ieee80211_hostap.c revision 190391
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 190391 2009-03-24 20:39:08Z sam $"); 29178354Ssam#endif 30178354Ssam 31178354Ssam/* 32178354Ssam * IEEE 802.11 HOSTAP mode support. 33178354Ssam */ 34178354Ssam#include "opt_inet.h" 35178354Ssam#include "opt_wlan.h" 36178354Ssam 37178354Ssam#include <sys/param.h> 38178354Ssam#include <sys/systm.h> 39178354Ssam#include <sys/mbuf.h> 40178354Ssam#include <sys/malloc.h> 41178354Ssam#include <sys/kernel.h> 42178354Ssam 43178354Ssam#include <sys/socket.h> 44178354Ssam#include <sys/sockio.h> 45178354Ssam#include <sys/endian.h> 46178354Ssam#include <sys/errno.h> 47178354Ssam#include <sys/proc.h> 48178354Ssam#include <sys/sysctl.h> 49178354Ssam 50178354Ssam#include <net/if.h> 51178354Ssam#include <net/if_media.h> 52178354Ssam#include <net/if_llc.h> 53178354Ssam#include <net/ethernet.h> 54178354Ssam 55178354Ssam#include <net/bpf.h> 56178354Ssam 57178354Ssam#include <net80211/ieee80211_var.h> 58178354Ssam#include <net80211/ieee80211_hostap.h> 59178354Ssam#include <net80211/ieee80211_input.h> 60190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 61190391Ssam#include <net80211/ieee80211_superg.h> 62190391Ssam#endif 63178354Ssam#include <net80211/ieee80211_wds.h> 64178354Ssam 65178354Ssam#define IEEE80211_RATE2MBS(r) (((r) & IEEE80211_RATE_VAL) / 2) 66178354Ssam 67178354Ssamstatic void hostap_vattach(struct ieee80211vap *); 68178354Ssamstatic int hostap_newstate(struct ieee80211vap *, enum ieee80211_state, int); 69178354Ssamstatic int hostap_input(struct ieee80211_node *ni, struct mbuf *m, 70178354Ssam int rssi, int noise, uint32_t rstamp); 71178354Ssamstatic void hostap_deliver_data(struct ieee80211vap *, 72178354Ssam struct ieee80211_node *, struct mbuf *); 73178354Ssamstatic void hostap_recv_mgmt(struct ieee80211_node *, struct mbuf *, 74178354Ssam int subtype, int rssi, int noise, uint32_t rstamp); 75178354Ssamstatic void hostap_recv_pspoll(struct ieee80211_node *, struct mbuf *); 76178354Ssam 77178354Ssamvoid 78178354Ssamieee80211_hostap_attach(struct ieee80211com *ic) 79178354Ssam{ 80178354Ssam ic->ic_vattach[IEEE80211_M_HOSTAP] = hostap_vattach; 81178354Ssam} 82178354Ssam 83178354Ssamvoid 84178354Ssamieee80211_hostap_detach(struct ieee80211com *ic) 85178354Ssam{ 86178354Ssam} 87178354Ssam 88178354Ssamstatic void 89178354Ssamhostap_vdetach(struct ieee80211vap *vap) 90178354Ssam{ 91178354Ssam} 92178354Ssam 93178354Ssamstatic void 94178354Ssamhostap_vattach(struct ieee80211vap *vap) 95178354Ssam{ 96178354Ssam vap->iv_newstate = hostap_newstate; 97178354Ssam vap->iv_input = hostap_input; 98178354Ssam vap->iv_recv_mgmt = hostap_recv_mgmt; 99178354Ssam vap->iv_opdetach = hostap_vdetach; 100178354Ssam vap->iv_deliver_data = hostap_deliver_data; 101178354Ssam} 102178354Ssam 103178354Ssamstatic void 104178354Ssamsta_disassoc(void *arg, struct ieee80211_node *ni) 105178354Ssam{ 106178354Ssam struct ieee80211vap *vap = arg; 107178354Ssam 108178354Ssam if (ni->ni_vap == vap && ni->ni_associd != 0) { 109178354Ssam IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DISASSOC, 110178354Ssam IEEE80211_REASON_ASSOC_LEAVE); 111178354Ssam ieee80211_node_leave(ni); 112178354Ssam } 113178354Ssam} 114178354Ssam 115178354Ssam/* 116178354Ssam * IEEE80211_M_HOSTAP vap state machine handler. 117178354Ssam */ 118178354Ssamstatic int 119178354Ssamhostap_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 120178354Ssam{ 121178354Ssam struct ieee80211com *ic = vap->iv_ic; 122178354Ssam enum ieee80211_state ostate; 123178354Ssam 124178354Ssam IEEE80211_LOCK_ASSERT(ic); 125178354Ssam 126178354Ssam ostate = vap->iv_state; 127178354Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", 128178354Ssam __func__, ieee80211_state_name[ostate], 129178354Ssam ieee80211_state_name[nstate], arg); 130178354Ssam vap->iv_state = nstate; /* state transition */ 131178354Ssam if (ostate != IEEE80211_S_SCAN) 132178354Ssam ieee80211_cancel_scan(vap); /* background scan */ 133178354Ssam switch (nstate) { 134178354Ssam case IEEE80211_S_INIT: 135178354Ssam switch (ostate) { 136178354Ssam case IEEE80211_S_SCAN: 137178354Ssam ieee80211_cancel_scan(vap); 138178354Ssam break; 139178354Ssam case IEEE80211_S_CAC: 140178354Ssam ieee80211_dfs_cac_stop(vap); 141178354Ssam break; 142178354Ssam case IEEE80211_S_RUN: 143178354Ssam ieee80211_iterate_nodes(&ic->ic_sta, sta_disassoc, vap); 144178354Ssam break; 145178354Ssam default: 146178354Ssam break; 147178354Ssam } 148178354Ssam if (ostate != IEEE80211_S_INIT) { 149178354Ssam /* NB: optimize INIT -> INIT case */ 150178354Ssam ieee80211_reset_bss(vap); 151178354Ssam } 152178354Ssam if (vap->iv_auth->ia_detach != NULL) 153178354Ssam vap->iv_auth->ia_detach(vap); 154178354Ssam break; 155178354Ssam case IEEE80211_S_SCAN: 156178354Ssam switch (ostate) { 157178354Ssam case IEEE80211_S_CSA: 158178354Ssam case IEEE80211_S_RUN: 159178354Ssam ieee80211_iterate_nodes(&ic->ic_sta, sta_disassoc, vap); 160178354Ssam /* 161178354Ssam * Clear overlapping BSS state; the beacon frame 162178354Ssam * will be reconstructed on transition to the RUN 163178354Ssam * state and the timeout routines check if the flag 164178354Ssam * is set before doing anything so this is sufficient. 165178354Ssam */ 166178354Ssam ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; 167178354Ssam ic->ic_flags_ext &= ~IEEE80211_FEXT_NONHT_PR; 168178354Ssam /* fall thru... */ 169178354Ssam case IEEE80211_S_CAC: 170178354Ssam /* 171178354Ssam * NB: We may get here because of a manual channel 172178354Ssam * change in which case we need to stop CAC 173178354Ssam * XXX no need to stop if ostate RUN but it's ok 174178354Ssam */ 175178354Ssam ieee80211_dfs_cac_stop(vap); 176178354Ssam /* fall thru... */ 177178354Ssam case IEEE80211_S_INIT: 178178354Ssam if (vap->iv_des_chan != IEEE80211_CHAN_ANYC && 179178354Ssam !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan)) { 180178354Ssam /* 181178354Ssam * Already have a channel; bypass the 182178354Ssam * scan and startup immediately. 183178354Ssam * ieee80211_create_ibss will call back to 184178354Ssam * move us to RUN state. 185178354Ssam */ 186178354Ssam ieee80211_create_ibss(vap, vap->iv_des_chan); 187178354Ssam break; 188178354Ssam } 189178354Ssam /* 190178354Ssam * Initiate a scan. We can come here as a result 191178354Ssam * of an IEEE80211_IOC_SCAN_REQ too in which case 192178354Ssam * the vap will be marked with IEEE80211_FEXT_SCANREQ 193178354Ssam * and the scan request parameters will be present 194178354Ssam * in iv_scanreq. Otherwise we do the default. 195178354Ssam */ 196178354Ssam if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { 197178354Ssam ieee80211_check_scan(vap, 198178354Ssam vap->iv_scanreq_flags, 199178354Ssam vap->iv_scanreq_duration, 200178354Ssam vap->iv_scanreq_mindwell, 201178354Ssam vap->iv_scanreq_maxdwell, 202178354Ssam vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); 203178354Ssam vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; 204178354Ssam } else 205178354Ssam ieee80211_check_scan_current(vap); 206178354Ssam break; 207178354Ssam case IEEE80211_S_SCAN: 208178354Ssam /* 209178354Ssam * A state change requires a reset; scan. 210178354Ssam */ 211178354Ssam ieee80211_check_scan_current(vap); 212178354Ssam break; 213178354Ssam default: 214178354Ssam break; 215178354Ssam } 216178354Ssam break; 217178354Ssam case IEEE80211_S_CAC: 218178354Ssam /* 219178354Ssam * Start CAC on a DFS channel. We come here when starting 220178354Ssam * a bss on a DFS channel (see ieee80211_create_ibss). 221178354Ssam */ 222178354Ssam ieee80211_dfs_cac_start(vap); 223178354Ssam break; 224178354Ssam case IEEE80211_S_RUN: 225178354Ssam if (vap->iv_flags & IEEE80211_F_WPA) { 226178354Ssam /* XXX validate prerequisites */ 227178354Ssam } 228178354Ssam switch (ostate) { 229178354Ssam case IEEE80211_S_INIT: 230178354Ssam /* 231178354Ssam * Already have a channel; bypass the 232178354Ssam * scan and startup immediately. 233178354Ssam * Note that ieee80211_create_ibss will call 234178354Ssam * back to do a RUN->RUN state change. 235178354Ssam */ 236178354Ssam ieee80211_create_ibss(vap, 237178354Ssam ieee80211_ht_adjust_channel(ic, 238178354Ssam ic->ic_curchan, vap->iv_flags_ext)); 239178354Ssam /* NB: iv_bss is changed on return */ 240178354Ssam break; 241178354Ssam case IEEE80211_S_CAC: 242178354Ssam /* 243178354Ssam * NB: This is the normal state change when CAC 244178354Ssam * expires and no radar was detected; no need to 245178354Ssam * clear the CAC timer as it's already expired. 246178354Ssam */ 247178354Ssam /* fall thru... */ 248178354Ssam case IEEE80211_S_CSA: 249178354Ssam /* 250178354Ssam * Update bss node channel to reflect where 251178354Ssam * we landed after CSA. 252178354Ssam */ 253178354Ssam ieee80211_node_set_chan(vap->iv_bss, 254178354Ssam ieee80211_ht_adjust_channel(ic, ic->ic_curchan, 255178354Ssam ieee80211_htchanflags(vap->iv_bss->ni_chan))); 256178354Ssam /* XXX bypass debug msgs */ 257178354Ssam break; 258178354Ssam case IEEE80211_S_SCAN: 259178354Ssam case IEEE80211_S_RUN: 260178354Ssam#ifdef IEEE80211_DEBUG 261178354Ssam if (ieee80211_msg_debug(vap)) { 262178354Ssam struct ieee80211_node *ni = vap->iv_bss; 263178354Ssam ieee80211_note(vap, 264178354Ssam "synchronized with %s ssid ", 265178354Ssam ether_sprintf(ni->ni_bssid)); 266178354Ssam ieee80211_print_essid(ni->ni_essid, 267178354Ssam ni->ni_esslen); 268178354Ssam /* XXX MCS/HT */ 269178354Ssam printf(" channel %d start %uMb\n", 270178354Ssam ieee80211_chan2ieee(ic, ic->ic_curchan), 271178354Ssam IEEE80211_RATE2MBS(ni->ni_txrate)); 272178354Ssam } 273178354Ssam#endif 274178354Ssam break; 275178354Ssam default: 276178354Ssam break; 277178354Ssam } 278178354Ssam /* 279178354Ssam * Start/stop the authenticator. We delay until here 280178354Ssam * to allow configuration to happen out of order. 281178354Ssam */ 282178354Ssam if (vap->iv_auth->ia_attach != NULL) { 283178354Ssam /* XXX check failure */ 284178354Ssam vap->iv_auth->ia_attach(vap); 285178354Ssam } else if (vap->iv_auth->ia_detach != NULL) { 286178354Ssam vap->iv_auth->ia_detach(vap); 287178354Ssam } 288178354Ssam ieee80211_node_authorize(vap->iv_bss); 289178354Ssam break; 290178354Ssam default: 291178354Ssam break; 292178354Ssam } 293178354Ssam return 0; 294178354Ssam} 295178354Ssam 296178354Ssamstatic void 297178354Ssamhostap_deliver_data(struct ieee80211vap *vap, 298178354Ssam struct ieee80211_node *ni, struct mbuf *m) 299178354Ssam{ 300178354Ssam struct ether_header *eh = mtod(m, struct ether_header *); 301178354Ssam struct ifnet *ifp = vap->iv_ifp; 302178354Ssam 303178354Ssam KASSERT(vap->iv_opmode == IEEE80211_M_HOSTAP, 304178354Ssam ("gack, opmode %d", vap->iv_opmode)); 305178354Ssam /* 306178354Ssam * Do accounting. 307178354Ssam */ 308178354Ssam ifp->if_ipackets++; 309178354Ssam IEEE80211_NODE_STAT(ni, rx_data); 310178354Ssam IEEE80211_NODE_STAT_ADD(ni, rx_bytes, m->m_pkthdr.len); 311178354Ssam if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 312178354Ssam m->m_flags |= M_MCAST; /* XXX M_BCAST? */ 313178354Ssam IEEE80211_NODE_STAT(ni, rx_mcast); 314178354Ssam } else 315178354Ssam IEEE80211_NODE_STAT(ni, rx_ucast); 316178354Ssam 317178354Ssam /* clear driver/net80211 flags before passing up */ 318178354Ssam m->m_flags &= ~M_80211_RX; 319178354Ssam 320178354Ssam /* perform as a bridge within the AP */ 321178354Ssam if ((vap->iv_flags & IEEE80211_F_NOBRIDGE) == 0) { 322178354Ssam struct mbuf *mcopy = NULL; 323178354Ssam 324178354Ssam if (m->m_flags & M_MCAST) { 325183364Ssam mcopy = m_dup(m, M_DONTWAIT); 326178354Ssam if (mcopy == NULL) 327178354Ssam ifp->if_oerrors++; 328178354Ssam else 329178354Ssam mcopy->m_flags |= M_MCAST; 330178354Ssam } else { 331178354Ssam /* 332178354Ssam * Check if the destination is associated with the 333178354Ssam * same vap and authorized to receive traffic. 334178354Ssam * Beware of traffic destined for the vap itself; 335178354Ssam * sending it will not work; just let it be delivered 336178354Ssam * normally. 337178354Ssam */ 338178354Ssam struct ieee80211_node *sta = ieee80211_find_vap_node( 339178354Ssam &vap->iv_ic->ic_sta, vap, eh->ether_dhost); 340178354Ssam if (sta != NULL) { 341178354Ssam if (ieee80211_node_is_authorized(sta)) { 342178354Ssam /* 343178354Ssam * Beware of sending to ourself; this 344178354Ssam * needs to happen via the normal 345178354Ssam * input path. 346178354Ssam */ 347178354Ssam if (sta != vap->iv_bss) { 348178354Ssam mcopy = m; 349178354Ssam m = NULL; 350178354Ssam } 351178354Ssam } else { 352178354Ssam vap->iv_stats.is_rx_unauth++; 353178354Ssam IEEE80211_NODE_STAT(sta, rx_unauth); 354178354Ssam } 355178354Ssam ieee80211_free_node(sta); 356178354Ssam } 357178354Ssam } 358178354Ssam if (mcopy != NULL) { 359178354Ssam int len, err; 360178354Ssam len = mcopy->m_pkthdr.len; 361186658Ssam err = ifp->if_transmit(ifp, mcopy); 362178354Ssam if (err) { 363178354Ssam /* NB: IFQ_HANDOFF reclaims mcopy */ 364178354Ssam } else { 365178354Ssam ifp->if_opackets++; 366178354Ssam } 367178354Ssam } 368178354Ssam } 369178354Ssam if (m != NULL) { 370178354Ssam /* 371178354Ssam * Mark frame as coming from vap's interface. 372178354Ssam */ 373178354Ssam m->m_pkthdr.rcvif = ifp; 374178354Ssam if (m->m_flags & M_MCAST) { 375178354Ssam /* 376178354Ssam * Spam DWDS vap's w/ multicast traffic. 377178354Ssam */ 378178354Ssam /* XXX only if dwds in use? */ 379178354Ssam ieee80211_dwds_mcast(vap, m); 380178354Ssam } 381178354Ssam if (ni->ni_vlan != 0) { 382178354Ssam /* attach vlan tag */ 383178354Ssam m->m_pkthdr.ether_vtag = ni->ni_vlan; 384178354Ssam m->m_flags |= M_VLANTAG; 385178354Ssam } 386178354Ssam ifp->if_input(ifp, m); 387178354Ssam } 388178354Ssam} 389178354Ssam 390178354Ssam/* 391178354Ssam * Decide if a received management frame should be 392178354Ssam * printed when debugging is enabled. This filters some 393178354Ssam * of the less interesting frames that come frequently 394178354Ssam * (e.g. beacons). 395178354Ssam */ 396178354Ssamstatic __inline int 397178354Ssamdoprint(struct ieee80211vap *vap, int subtype) 398178354Ssam{ 399178354Ssam switch (subtype) { 400178354Ssam case IEEE80211_FC0_SUBTYPE_BEACON: 401178354Ssam return (vap->iv_ic->ic_flags & IEEE80211_F_SCAN); 402178354Ssam case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 403178354Ssam return 0; 404178354Ssam } 405178354Ssam return 1; 406178354Ssam} 407178354Ssam 408178354Ssam/* 409178354Ssam * Process a received frame. The node associated with the sender 410178354Ssam * should be supplied. If nothing was found in the node table then 411178354Ssam * the caller is assumed to supply a reference to iv_bss instead. 412178354Ssam * The RSSI and a timestamp are also supplied. The RSSI data is used 413178354Ssam * during AP scanning to select a AP to associate with; it can have 414178354Ssam * any units so long as values have consistent units and higher values 415178354Ssam * mean ``better signal''. The receive timestamp is currently not used 416178354Ssam * by the 802.11 layer. 417178354Ssam */ 418178354Ssamstatic int 419178354Ssamhostap_input(struct ieee80211_node *ni, struct mbuf *m, 420178354Ssam int rssi, int noise, uint32_t rstamp) 421178354Ssam{ 422178354Ssam#define SEQ_LEQ(a,b) ((int)((a)-(b)) <= 0) 423178354Ssam#define HAS_SEQ(type) ((type & 0x4) == 0) 424178354Ssam struct ieee80211vap *vap = ni->ni_vap; 425178354Ssam struct ieee80211com *ic = ni->ni_ic; 426178354Ssam struct ifnet *ifp = vap->iv_ifp; 427178354Ssam struct ieee80211_frame *wh; 428178354Ssam struct ieee80211_key *key; 429178354Ssam struct ether_header *eh; 430178354Ssam int hdrspace, need_tap; 431178354Ssam uint8_t dir, type, subtype, qos; 432178354Ssam uint8_t *bssid; 433178354Ssam uint16_t rxseq; 434178354Ssam 435183247Ssam if (m->m_flags & M_AMPDU_MPDU) { 436178354Ssam /* 437178354Ssam * Fastpath for A-MPDU reorder q resubmission. Frames 438183247Ssam * w/ M_AMPDU_MPDU marked have already passed through 439183247Ssam * here but were received out of order and been held on 440183247Ssam * the reorder queue. When resubmitted they are marked 441183247Ssam * with the M_AMPDU_MPDU flag and we can bypass most of 442183247Ssam * the normal processing. 443178354Ssam */ 444178354Ssam wh = mtod(m, struct ieee80211_frame *); 445178354Ssam type = IEEE80211_FC0_TYPE_DATA; 446178354Ssam dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 447178354Ssam subtype = IEEE80211_FC0_SUBTYPE_QOS; 448178354Ssam hdrspace = ieee80211_hdrspace(ic, wh); /* XXX optimize? */ 449178354Ssam goto resubmit_ampdu; 450178354Ssam } 451178354Ssam 452178354Ssam KASSERT(ni != NULL, ("null node")); 453178354Ssam ni->ni_inact = ni->ni_inact_reload; 454178354Ssam 455178354Ssam need_tap = 1; /* mbuf need to be tapped. */ 456178354Ssam type = -1; /* undefined */ 457178354Ssam 458178354Ssam if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 459178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 460178354Ssam ni->ni_macaddr, NULL, 461178354Ssam "too short (1): len %u", m->m_pkthdr.len); 462178354Ssam vap->iv_stats.is_rx_tooshort++; 463178354Ssam goto out; 464178354Ssam } 465178354Ssam /* 466178354Ssam * Bit of a cheat here, we use a pointer for a 3-address 467178354Ssam * frame format but don't reference fields past outside 468178354Ssam * ieee80211_frame_min w/o first validating the data is 469178354Ssam * present. 470178354Ssam */ 471178354Ssam wh = mtod(m, struct ieee80211_frame *); 472178354Ssam 473178354Ssam if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 474178354Ssam IEEE80211_FC0_VERSION_0) { 475178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 476178354Ssam ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]); 477178354Ssam vap->iv_stats.is_rx_badversion++; 478178354Ssam goto err; 479178354Ssam } 480178354Ssam 481178354Ssam dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 482178354Ssam type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 483178354Ssam subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 484178354Ssam if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 485178354Ssam if (dir != IEEE80211_FC1_DIR_NODS) 486178354Ssam bssid = wh->i_addr1; 487178354Ssam else if (type == IEEE80211_FC0_TYPE_CTL) 488178354Ssam bssid = wh->i_addr1; 489178354Ssam else { 490178354Ssam if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 491178354Ssam IEEE80211_DISCARD_MAC(vap, 492178354Ssam IEEE80211_MSG_ANY, ni->ni_macaddr, 493178354Ssam NULL, "too short (2): len %u", 494178354Ssam m->m_pkthdr.len); 495178354Ssam vap->iv_stats.is_rx_tooshort++; 496178354Ssam goto out; 497178354Ssam } 498178354Ssam bssid = wh->i_addr3; 499178354Ssam } 500178354Ssam /* 501178354Ssam * Validate the bssid. 502178354Ssam */ 503178354Ssam if (!(type == IEEE80211_FC0_TYPE_MGT && 504178354Ssam subtype == IEEE80211_FC0_SUBTYPE_BEACON) && 505178354Ssam !IEEE80211_ADDR_EQ(bssid, vap->iv_bss->ni_bssid) && 506178354Ssam !IEEE80211_ADDR_EQ(bssid, ifp->if_broadcastaddr)) { 507178354Ssam /* not interested in */ 508178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 509178354Ssam bssid, NULL, "%s", "not to bss"); 510178354Ssam vap->iv_stats.is_rx_wrongbss++; 511178354Ssam goto out; 512178354Ssam } 513178354Ssam 514178354Ssam IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 515178354Ssam ni->ni_noise = noise; 516178354Ssam ni->ni_rstamp = rstamp; 517178354Ssam if (HAS_SEQ(type)) { 518178354Ssam uint8_t tid = ieee80211_gettid(wh); 519178354Ssam if (IEEE80211_QOS_HAS_SEQ(wh) && 520178354Ssam TID_TO_WME_AC(tid) >= WME_AC_VI) 521178354Ssam ic->ic_wme.wme_hipri_traffic++; 522178354Ssam rxseq = le16toh(*(uint16_t *)wh->i_seq); 523178354Ssam if ((ni->ni_flags & IEEE80211_NODE_HT) == 0 && 524178354Ssam (wh->i_fc[1] & IEEE80211_FC1_RETRY) && 525178354Ssam SEQ_LEQ(rxseq, ni->ni_rxseqs[tid])) { 526178354Ssam /* duplicate, discard */ 527178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 528178354Ssam bssid, "duplicate", 529178354Ssam "seqno <%u,%u> fragno <%u,%u> tid %u", 530178354Ssam rxseq >> IEEE80211_SEQ_SEQ_SHIFT, 531178354Ssam ni->ni_rxseqs[tid] >> 532178354Ssam IEEE80211_SEQ_SEQ_SHIFT, 533178354Ssam rxseq & IEEE80211_SEQ_FRAG_MASK, 534178354Ssam ni->ni_rxseqs[tid] & 535178354Ssam IEEE80211_SEQ_FRAG_MASK, 536178354Ssam tid); 537178354Ssam vap->iv_stats.is_rx_dup++; 538178354Ssam IEEE80211_NODE_STAT(ni, rx_dup); 539178354Ssam goto out; 540178354Ssam } 541178354Ssam ni->ni_rxseqs[tid] = rxseq; 542178354Ssam } 543178354Ssam } 544178354Ssam 545178354Ssam switch (type) { 546178354Ssam case IEEE80211_FC0_TYPE_DATA: 547178354Ssam hdrspace = ieee80211_hdrspace(ic, wh); 548178354Ssam if (m->m_len < hdrspace && 549178354Ssam (m = m_pullup(m, hdrspace)) == NULL) { 550178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 551178354Ssam ni->ni_macaddr, NULL, 552178354Ssam "data too short: expecting %u", hdrspace); 553178354Ssam vap->iv_stats.is_rx_tooshort++; 554178354Ssam goto out; /* XXX */ 555178354Ssam } 556178354Ssam if (!(dir == IEEE80211_FC1_DIR_TODS || 557178354Ssam (dir == IEEE80211_FC1_DIR_DSTODS && 558178354Ssam (vap->iv_flags & IEEE80211_F_DWDS)))) { 559178354Ssam if (dir != IEEE80211_FC1_DIR_DSTODS) { 560178354Ssam IEEE80211_DISCARD(vap, 561178354Ssam IEEE80211_MSG_INPUT, wh, "data", 562178354Ssam "incorrect dir 0x%x", dir); 563178354Ssam } else { 564178354Ssam IEEE80211_DISCARD(vap, 565178354Ssam IEEE80211_MSG_INPUT | 566178354Ssam IEEE80211_MSG_WDS, wh, 567178354Ssam "4-address data", 568178354Ssam "%s", "DWDS not enabled"); 569178354Ssam } 570178354Ssam vap->iv_stats.is_rx_wrongdir++; 571178354Ssam goto out; 572178354Ssam } 573178354Ssam /* check if source STA is associated */ 574178354Ssam if (ni == vap->iv_bss) { 575178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 576178354Ssam wh, "data", "%s", "unknown src"); 577178354Ssam ieee80211_send_error(ni, wh->i_addr2, 578178354Ssam IEEE80211_FC0_SUBTYPE_DEAUTH, 579178354Ssam IEEE80211_REASON_NOT_AUTHED); 580178354Ssam vap->iv_stats.is_rx_notassoc++; 581178354Ssam goto err; 582178354Ssam } 583178354Ssam if (ni->ni_associd == 0) { 584178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 585178354Ssam wh, "data", "%s", "unassoc src"); 586178354Ssam IEEE80211_SEND_MGMT(ni, 587178354Ssam IEEE80211_FC0_SUBTYPE_DISASSOC, 588178354Ssam IEEE80211_REASON_NOT_ASSOCED); 589178354Ssam vap->iv_stats.is_rx_notassoc++; 590178354Ssam goto err; 591178354Ssam } 592178354Ssam 593178354Ssam /* 594178354Ssam * Check for power save state change. 595178354Ssam * XXX out-of-order A-MPDU frames? 596178354Ssam */ 597178354Ssam if (((wh->i_fc[1] & IEEE80211_FC1_PWR_MGT) ^ 598178354Ssam (ni->ni_flags & IEEE80211_NODE_PWR_MGT))) 599178354Ssam ieee80211_node_pwrsave(ni, 600178354Ssam wh->i_fc[1] & IEEE80211_FC1_PWR_MGT); 601178354Ssam /* 602178354Ssam * For 4-address packets handle WDS discovery 603178354Ssam * notifications. Once a WDS link is setup frames 604178354Ssam * are just delivered to the WDS vap (see below). 605178354Ssam */ 606178354Ssam if (dir == IEEE80211_FC1_DIR_DSTODS && ni->ni_wdsvap == NULL) { 607178354Ssam if (!ieee80211_node_is_authorized(ni)) { 608178354Ssam IEEE80211_DISCARD(vap, 609178354Ssam IEEE80211_MSG_INPUT | 610178354Ssam IEEE80211_MSG_WDS, wh, 611178354Ssam "4-address data", 612178354Ssam "%s", "unauthorized port"); 613178354Ssam vap->iv_stats.is_rx_unauth++; 614178354Ssam IEEE80211_NODE_STAT(ni, rx_unauth); 615178354Ssam goto err; 616178354Ssam } 617178354Ssam ieee80211_dwds_discover(ni, m); 618178354Ssam return type; 619178354Ssam } 620178354Ssam 621178354Ssam /* 622183247Ssam * Handle A-MPDU re-ordering. If the frame is to be 623183247Ssam * processed directly then ieee80211_ampdu_reorder 624178354Ssam * will return 0; otherwise it has consumed the mbuf 625178354Ssam * and we should do nothing more with it. 626178354Ssam */ 627183247Ssam if ((m->m_flags & M_AMPDU) && 628178354Ssam ieee80211_ampdu_reorder(ni, m) != 0) { 629178354Ssam m = NULL; 630178354Ssam goto out; 631178354Ssam } 632178354Ssam resubmit_ampdu: 633178354Ssam 634178354Ssam /* 635178354Ssam * Handle privacy requirements. Note that we 636178354Ssam * must not be preempted from here until after 637178354Ssam * we (potentially) call ieee80211_crypto_demic; 638178354Ssam * otherwise we may violate assumptions in the 639178354Ssam * crypto cipher modules used to do delayed update 640178354Ssam * of replay sequence numbers. 641178354Ssam */ 642178354Ssam if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 643178354Ssam if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 644178354Ssam /* 645178354Ssam * Discard encrypted frames when privacy is off. 646178354Ssam */ 647178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 648178354Ssam wh, "WEP", "%s", "PRIVACY off"); 649178354Ssam vap->iv_stats.is_rx_noprivacy++; 650178354Ssam IEEE80211_NODE_STAT(ni, rx_noprivacy); 651178354Ssam goto out; 652178354Ssam } 653178354Ssam key = ieee80211_crypto_decap(ni, m, hdrspace); 654178354Ssam if (key == NULL) { 655178354Ssam /* NB: stats+msgs handled in crypto_decap */ 656178354Ssam IEEE80211_NODE_STAT(ni, rx_wepfail); 657178354Ssam goto out; 658178354Ssam } 659178354Ssam wh = mtod(m, struct ieee80211_frame *); 660178354Ssam wh->i_fc[1] &= ~IEEE80211_FC1_WEP; 661178354Ssam } else { 662178354Ssam /* XXX M_WEP and IEEE80211_F_PRIVACY */ 663178354Ssam key = NULL; 664178354Ssam } 665178354Ssam 666178354Ssam /* 667178354Ssam * Save QoS bits for use below--before we strip the header. 668178354Ssam */ 669178354Ssam if (subtype == IEEE80211_FC0_SUBTYPE_QOS) { 670178354Ssam qos = (dir == IEEE80211_FC1_DIR_DSTODS) ? 671178354Ssam ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] : 672178354Ssam ((struct ieee80211_qosframe *)wh)->i_qos[0]; 673178354Ssam } else 674178354Ssam qos = 0; 675178354Ssam 676178354Ssam /* 677178354Ssam * Next up, any fragmentation. 678178354Ssam */ 679178354Ssam if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 680178354Ssam m = ieee80211_defrag(ni, m, hdrspace); 681178354Ssam if (m == NULL) { 682178354Ssam /* Fragment dropped or frame not complete yet */ 683178354Ssam goto out; 684178354Ssam } 685178354Ssam } 686178354Ssam wh = NULL; /* no longer valid, catch any uses */ 687178354Ssam 688178354Ssam /* 689178354Ssam * Next strip any MSDU crypto bits. 690178354Ssam */ 691178354Ssam if (key != NULL && !ieee80211_crypto_demic(vap, key, m, 0)) { 692178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 693178354Ssam ni->ni_macaddr, "data", "%s", "demic error"); 694178354Ssam vap->iv_stats.is_rx_demicfail++; 695178354Ssam IEEE80211_NODE_STAT(ni, rx_demicfail); 696178354Ssam goto out; 697178354Ssam } 698178354Ssam /* copy to listener after decrypt */ 699178354Ssam if (bpf_peers_present(vap->iv_rawbpf)) 700178354Ssam bpf_mtap(vap->iv_rawbpf, m); 701178354Ssam need_tap = 0; 702178354Ssam /* 703178354Ssam * Finally, strip the 802.11 header. 704178354Ssam */ 705178354Ssam m = ieee80211_decap(vap, m, hdrspace); 706178354Ssam if (m == NULL) { 707178354Ssam /* XXX mask bit to check for both */ 708178354Ssam /* don't count Null data frames as errors */ 709178354Ssam if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 710178354Ssam subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 711178354Ssam goto out; 712178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 713178354Ssam ni->ni_macaddr, "data", "%s", "decap error"); 714178354Ssam vap->iv_stats.is_rx_decap++; 715178354Ssam IEEE80211_NODE_STAT(ni, rx_decap); 716178354Ssam goto err; 717178354Ssam } 718178354Ssam eh = mtod(m, struct ether_header *); 719178354Ssam if (!ieee80211_node_is_authorized(ni)) { 720178354Ssam /* 721178354Ssam * Deny any non-PAE frames received prior to 722178354Ssam * authorization. For open/shared-key 723178354Ssam * authentication the port is mark authorized 724178354Ssam * after authentication completes. For 802.1x 725178354Ssam * the port is not marked authorized by the 726178354Ssam * authenticator until the handshake has completed. 727178354Ssam */ 728178354Ssam if (eh->ether_type != htons(ETHERTYPE_PAE)) { 729178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 730178354Ssam eh->ether_shost, "data", 731178354Ssam "unauthorized port: ether type 0x%x len %u", 732178354Ssam eh->ether_type, m->m_pkthdr.len); 733178354Ssam vap->iv_stats.is_rx_unauth++; 734178354Ssam IEEE80211_NODE_STAT(ni, rx_unauth); 735178354Ssam goto err; 736178354Ssam } 737178354Ssam } else { 738178354Ssam /* 739178354Ssam * When denying unencrypted frames, discard 740178354Ssam * any non-PAE frames received without encryption. 741178354Ssam */ 742178354Ssam if ((vap->iv_flags & IEEE80211_F_DROPUNENC) && 743178354Ssam (key == NULL && (m->m_flags & M_WEP) == 0) && 744178354Ssam eh->ether_type != htons(ETHERTYPE_PAE)) { 745178354Ssam /* 746178354Ssam * Drop unencrypted frames. 747178354Ssam */ 748178354Ssam vap->iv_stats.is_rx_unencrypted++; 749178354Ssam IEEE80211_NODE_STAT(ni, rx_unencrypted); 750178354Ssam goto out; 751178354Ssam } 752178354Ssam } 753178354Ssam /* XXX require HT? */ 754178354Ssam if (qos & IEEE80211_QOS_AMSDU) { 755178354Ssam m = ieee80211_decap_amsdu(ni, m); 756178354Ssam if (m == NULL) 757178354Ssam return IEEE80211_FC0_TYPE_DATA; 758190391Ssam } else { 759190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 760190391Ssam m = ieee80211_decap_fastframe(vap, ni, m); 761190391Ssam if (m == NULL) 762178354Ssam return IEEE80211_FC0_TYPE_DATA; 763190391Ssam#endif 764178354Ssam } 765178354Ssam if (dir == IEEE80211_FC1_DIR_DSTODS && ni->ni_wdsvap != NULL) 766178354Ssam ieee80211_deliver_data(ni->ni_wdsvap, ni, m); 767178354Ssam else 768178354Ssam hostap_deliver_data(vap, ni, m); 769178354Ssam return IEEE80211_FC0_TYPE_DATA; 770178354Ssam 771178354Ssam case IEEE80211_FC0_TYPE_MGT: 772178354Ssam vap->iv_stats.is_rx_mgmt++; 773178354Ssam IEEE80211_NODE_STAT(ni, rx_mgmt); 774178354Ssam if (dir != IEEE80211_FC1_DIR_NODS) { 775178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 776178354Ssam wh, "mgt", "incorrect dir 0x%x", dir); 777178354Ssam vap->iv_stats.is_rx_wrongdir++; 778178354Ssam goto err; 779178354Ssam } 780178354Ssam if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 781178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 782178354Ssam ni->ni_macaddr, "mgt", "too short: len %u", 783178354Ssam m->m_pkthdr.len); 784178354Ssam vap->iv_stats.is_rx_tooshort++; 785178354Ssam goto out; 786178354Ssam } 787178354Ssam if (IEEE80211_IS_MULTICAST(wh->i_addr2)) { 788178354Ssam /* ensure return frames are unicast */ 789178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 790178354Ssam wh, NULL, "source is multicast: %s", 791178354Ssam ether_sprintf(wh->i_addr2)); 792178354Ssam vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */ 793178354Ssam goto out; 794178354Ssam } 795178354Ssam#ifdef IEEE80211_DEBUG 796178354Ssam if ((ieee80211_msg_debug(vap) && doprint(vap, subtype)) || 797178354Ssam ieee80211_msg_dumppkts(vap)) { 798178354Ssam if_printf(ifp, "received %s from %s rssi %d\n", 799178354Ssam ieee80211_mgt_subtype_name[subtype >> 800178354Ssam IEEE80211_FC0_SUBTYPE_SHIFT], 801178354Ssam ether_sprintf(wh->i_addr2), rssi); 802178354Ssam } 803178354Ssam#endif 804178354Ssam if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 805178354Ssam if (subtype != IEEE80211_FC0_SUBTYPE_AUTH) { 806178354Ssam /* 807178354Ssam * Only shared key auth frames with a challenge 808178354Ssam * should be encrypted, discard all others. 809178354Ssam */ 810178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 811178354Ssam wh, NULL, 812178354Ssam "%s", "WEP set but not permitted"); 813178354Ssam vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 814178354Ssam goto out; 815178354Ssam } 816178354Ssam if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 817178354Ssam /* 818178354Ssam * Discard encrypted frames when privacy is off. 819178354Ssam */ 820178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 821178354Ssam wh, NULL, "%s", "WEP set but PRIVACY off"); 822178354Ssam vap->iv_stats.is_rx_noprivacy++; 823178354Ssam goto out; 824178354Ssam } 825178354Ssam hdrspace = ieee80211_hdrspace(ic, wh); 826178354Ssam key = ieee80211_crypto_decap(ni, m, hdrspace); 827178354Ssam if (key == NULL) { 828178354Ssam /* NB: stats+msgs handled in crypto_decap */ 829178354Ssam goto out; 830178354Ssam } 831178354Ssam wh = mtod(m, struct ieee80211_frame *); 832178354Ssam wh->i_fc[1] &= ~IEEE80211_FC1_WEP; 833178354Ssam } 834178354Ssam if (bpf_peers_present(vap->iv_rawbpf)) 835178354Ssam bpf_mtap(vap->iv_rawbpf, m); 836178354Ssam vap->iv_recv_mgmt(ni, m, subtype, rssi, noise, rstamp); 837178354Ssam m_freem(m); 838178354Ssam return IEEE80211_FC0_TYPE_MGT; 839178354Ssam 840178354Ssam case IEEE80211_FC0_TYPE_CTL: 841178354Ssam vap->iv_stats.is_rx_ctl++; 842178354Ssam IEEE80211_NODE_STAT(ni, rx_ctrl); 843178354Ssam switch (subtype) { 844178354Ssam case IEEE80211_FC0_SUBTYPE_PS_POLL: 845178354Ssam hostap_recv_pspoll(ni, m); 846178354Ssam break; 847178354Ssam case IEEE80211_FC0_SUBTYPE_BAR: 848178354Ssam ieee80211_recv_bar(ni, m); 849178354Ssam break; 850178354Ssam } 851178354Ssam goto out; 852178354Ssam default: 853178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 854178354Ssam wh, "bad", "frame type 0x%x", type); 855178354Ssam /* should not come here */ 856178354Ssam break; 857178354Ssam } 858178354Ssamerr: 859178354Ssam ifp->if_ierrors++; 860178354Ssamout: 861178354Ssam if (m != NULL) { 862178354Ssam if (bpf_peers_present(vap->iv_rawbpf) && need_tap) 863178354Ssam bpf_mtap(vap->iv_rawbpf, m); 864178354Ssam m_freem(m); 865178354Ssam } 866178354Ssam return type; 867178354Ssam#undef SEQ_LEQ 868178354Ssam} 869178354Ssam 870178354Ssamstatic void 871178354Ssamhostap_auth_open(struct ieee80211_node *ni, struct ieee80211_frame *wh, 872178354Ssam int rssi, int noise, uint32_t rstamp, uint16_t seq, uint16_t status) 873178354Ssam{ 874178354Ssam struct ieee80211vap *vap = ni->ni_vap; 875178354Ssam 876178354Ssam KASSERT(vap->iv_state == IEEE80211_S_RUN, ("state %d", vap->iv_state)); 877178354Ssam 878178354Ssam if (ni->ni_authmode == IEEE80211_AUTH_SHARED) { 879178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 880178354Ssam ni->ni_macaddr, "open auth", 881178354Ssam "bad sta auth mode %u", ni->ni_authmode); 882178354Ssam vap->iv_stats.is_rx_bad_auth++; /* XXX */ 883178354Ssam /* 884178354Ssam * Clear any challenge text that may be there if 885178354Ssam * a previous shared key auth failed and then an 886178354Ssam * open auth is attempted. 887178354Ssam */ 888178354Ssam if (ni->ni_challenge != NULL) { 889186302Ssam free(ni->ni_challenge, M_80211_NODE); 890178354Ssam ni->ni_challenge = NULL; 891178354Ssam } 892178354Ssam /* XXX hack to workaround calling convention */ 893178354Ssam ieee80211_send_error(ni, wh->i_addr2, 894178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 895178354Ssam (seq + 1) | (IEEE80211_STATUS_ALG<<16)); 896178354Ssam return; 897178354Ssam } 898178354Ssam if (seq != IEEE80211_AUTH_OPEN_REQUEST) { 899178354Ssam vap->iv_stats.is_rx_bad_auth++; 900178354Ssam return; 901178354Ssam } 902178354Ssam /* always accept open authentication requests */ 903178354Ssam if (ni == vap->iv_bss) { 904178354Ssam ni = ieee80211_dup_bss(vap, wh->i_addr2); 905178354Ssam if (ni == NULL) 906178354Ssam return; 907178354Ssam } else if ((ni->ni_flags & IEEE80211_NODE_AREF) == 0) 908178354Ssam (void) ieee80211_ref_node(ni); 909178354Ssam /* 910178354Ssam * Mark the node as referenced to reflect that it's 911178354Ssam * reference count has been bumped to insure it remains 912178354Ssam * after the transaction completes. 913178354Ssam */ 914178354Ssam ni->ni_flags |= IEEE80211_NODE_AREF; 915186099Ssam /* 916186151Ssam * Mark the node as requiring a valid association id 917186099Ssam * before outbound traffic is permitted. 918186099Ssam */ 919186099Ssam ni->ni_flags |= IEEE80211_NODE_ASSOCID; 920178354Ssam 921178354Ssam if (vap->iv_acl != NULL && 922178354Ssam vap->iv_acl->iac_getpolicy(vap) == IEEE80211_MACCMD_POLICY_RADIUS) { 923178354Ssam /* 924178354Ssam * When the ACL policy is set to RADIUS we defer the 925178354Ssam * authorization to a user agent. Dispatch an event, 926178354Ssam * a subsequent MLME call will decide the fate of the 927178354Ssam * station. If the user agent is not present then the 928178354Ssam * node will be reclaimed due to inactivity. 929178354Ssam */ 930178354Ssam IEEE80211_NOTE_MAC(vap, 931178354Ssam IEEE80211_MSG_AUTH | IEEE80211_MSG_ACL, ni->ni_macaddr, 932178354Ssam "%s", "station authentication defered (radius acl)"); 933178354Ssam ieee80211_notify_node_auth(ni); 934178354Ssam } else { 935178354Ssam IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, seq + 1); 936178354Ssam IEEE80211_NOTE_MAC(vap, 937178354Ssam IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, ni->ni_macaddr, 938178354Ssam "%s", "station authenticated (open)"); 939178354Ssam /* 940178354Ssam * When 802.1x is not in use mark the port 941178354Ssam * authorized at this point so traffic can flow. 942178354Ssam */ 943178354Ssam if (ni->ni_authmode != IEEE80211_AUTH_8021X) 944178354Ssam ieee80211_node_authorize(ni); 945178354Ssam } 946178354Ssam} 947178354Ssam 948178354Ssamstatic void 949178354Ssamhostap_auth_shared(struct ieee80211_node *ni, struct ieee80211_frame *wh, 950178354Ssam uint8_t *frm, uint8_t *efrm, int rssi, int noise, uint32_t rstamp, 951178354Ssam uint16_t seq, uint16_t status) 952178354Ssam{ 953178354Ssam struct ieee80211vap *vap = ni->ni_vap; 954178354Ssam uint8_t *challenge; 955178354Ssam int allocbs, estatus; 956178354Ssam 957178354Ssam KASSERT(vap->iv_state == IEEE80211_S_RUN, ("state %d", vap->iv_state)); 958178354Ssam 959178354Ssam /* 960178354Ssam * NB: this can happen as we allow pre-shared key 961178354Ssam * authentication to be enabled w/o wep being turned 962178354Ssam * on so that configuration of these can be done 963178354Ssam * in any order. It may be better to enforce the 964178354Ssam * ordering in which case this check would just be 965178354Ssam * for sanity/consistency. 966178354Ssam */ 967178354Ssam if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 968178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 969178354Ssam ni->ni_macaddr, "shared key auth", 970178354Ssam "%s", " PRIVACY is disabled"); 971178354Ssam estatus = IEEE80211_STATUS_ALG; 972178354Ssam goto bad; 973178354Ssam } 974178354Ssam /* 975178354Ssam * Pre-shared key authentication is evil; accept 976178354Ssam * it only if explicitly configured (it is supported 977178354Ssam * mainly for compatibility with clients like Mac OS X). 978178354Ssam */ 979178354Ssam if (ni->ni_authmode != IEEE80211_AUTH_AUTO && 980178354Ssam ni->ni_authmode != IEEE80211_AUTH_SHARED) { 981178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 982178354Ssam ni->ni_macaddr, "shared key auth", 983178354Ssam "bad sta auth mode %u", ni->ni_authmode); 984178354Ssam vap->iv_stats.is_rx_bad_auth++; /* XXX maybe a unique error? */ 985178354Ssam estatus = IEEE80211_STATUS_ALG; 986178354Ssam goto bad; 987178354Ssam } 988178354Ssam 989178354Ssam challenge = NULL; 990178354Ssam if (frm + 1 < efrm) { 991178354Ssam if ((frm[1] + 2) > (efrm - frm)) { 992178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 993178354Ssam ni->ni_macaddr, "shared key auth", 994178354Ssam "ie %d/%d too long", 995178354Ssam frm[0], (frm[1] + 2) - (efrm - frm)); 996178354Ssam vap->iv_stats.is_rx_bad_auth++; 997178354Ssam estatus = IEEE80211_STATUS_CHALLENGE; 998178354Ssam goto bad; 999178354Ssam } 1000178354Ssam if (*frm == IEEE80211_ELEMID_CHALLENGE) 1001178354Ssam challenge = frm; 1002178354Ssam frm += frm[1] + 2; 1003178354Ssam } 1004178354Ssam switch (seq) { 1005178354Ssam case IEEE80211_AUTH_SHARED_CHALLENGE: 1006178354Ssam case IEEE80211_AUTH_SHARED_RESPONSE: 1007178354Ssam if (challenge == NULL) { 1008178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1009178354Ssam ni->ni_macaddr, "shared key auth", 1010178354Ssam "%s", "no challenge"); 1011178354Ssam vap->iv_stats.is_rx_bad_auth++; 1012178354Ssam estatus = IEEE80211_STATUS_CHALLENGE; 1013178354Ssam goto bad; 1014178354Ssam } 1015178354Ssam if (challenge[1] != IEEE80211_CHALLENGE_LEN) { 1016178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1017178354Ssam ni->ni_macaddr, "shared key auth", 1018178354Ssam "bad challenge len %d", challenge[1]); 1019178354Ssam vap->iv_stats.is_rx_bad_auth++; 1020178354Ssam estatus = IEEE80211_STATUS_CHALLENGE; 1021178354Ssam goto bad; 1022178354Ssam } 1023178354Ssam default: 1024178354Ssam break; 1025178354Ssam } 1026178354Ssam switch (seq) { 1027178354Ssam case IEEE80211_AUTH_SHARED_REQUEST: 1028178354Ssam if (ni == vap->iv_bss) { 1029178354Ssam ni = ieee80211_dup_bss(vap, wh->i_addr2); 1030178354Ssam if (ni == NULL) { 1031178354Ssam /* NB: no way to return an error */ 1032178354Ssam return; 1033178354Ssam } 1034178354Ssam allocbs = 1; 1035178354Ssam } else { 1036178354Ssam if ((ni->ni_flags & IEEE80211_NODE_AREF) == 0) 1037178354Ssam (void) ieee80211_ref_node(ni); 1038178354Ssam allocbs = 0; 1039178354Ssam } 1040178354Ssam /* 1041178354Ssam * Mark the node as referenced to reflect that it's 1042178354Ssam * reference count has been bumped to insure it remains 1043178354Ssam * after the transaction completes. 1044178354Ssam */ 1045178354Ssam ni->ni_flags |= IEEE80211_NODE_AREF; 1046186099Ssam /* 1047186099Ssam * Mark the node as requiring a valid associatio id 1048186099Ssam * before outbound traffic is permitted. 1049186099Ssam */ 1050186099Ssam ni->ni_flags |= IEEE80211_NODE_ASSOCID; 1051178354Ssam IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 1052178354Ssam ni->ni_noise = noise; 1053178354Ssam ni->ni_rstamp = rstamp; 1054178354Ssam if (!ieee80211_alloc_challenge(ni)) { 1055178354Ssam /* NB: don't return error so they rexmit */ 1056178354Ssam return; 1057178354Ssam } 1058178354Ssam get_random_bytes(ni->ni_challenge, 1059178354Ssam IEEE80211_CHALLENGE_LEN); 1060178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, 1061178354Ssam ni, "shared key %sauth request", allocbs ? "" : "re"); 1062178354Ssam /* 1063178354Ssam * When the ACL policy is set to RADIUS we defer the 1064178354Ssam * authorization to a user agent. Dispatch an event, 1065178354Ssam * a subsequent MLME call will decide the fate of the 1066178354Ssam * station. If the user agent is not present then the 1067178354Ssam * node will be reclaimed due to inactivity. 1068178354Ssam */ 1069178354Ssam if (vap->iv_acl != NULL && 1070178354Ssam vap->iv_acl->iac_getpolicy(vap) == IEEE80211_MACCMD_POLICY_RADIUS) { 1071178354Ssam IEEE80211_NOTE_MAC(vap, 1072178354Ssam IEEE80211_MSG_AUTH | IEEE80211_MSG_ACL, 1073178354Ssam ni->ni_macaddr, 1074178354Ssam "%s", "station authentication defered (radius acl)"); 1075178354Ssam ieee80211_notify_node_auth(ni); 1076178354Ssam return; 1077178354Ssam } 1078178354Ssam break; 1079178354Ssam case IEEE80211_AUTH_SHARED_RESPONSE: 1080178354Ssam if (ni == vap->iv_bss) { 1081178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1082178354Ssam ni->ni_macaddr, "shared key response", 1083178354Ssam "%s", "unknown station"); 1084178354Ssam /* NB: don't send a response */ 1085178354Ssam return; 1086178354Ssam } 1087178354Ssam if (ni->ni_challenge == NULL) { 1088178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1089178354Ssam ni->ni_macaddr, "shared key response", 1090178354Ssam "%s", "no challenge recorded"); 1091178354Ssam vap->iv_stats.is_rx_bad_auth++; 1092178354Ssam estatus = IEEE80211_STATUS_CHALLENGE; 1093178354Ssam goto bad; 1094178354Ssam } 1095178354Ssam if (memcmp(ni->ni_challenge, &challenge[2], 1096178354Ssam challenge[1]) != 0) { 1097178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1098178354Ssam ni->ni_macaddr, "shared key response", 1099178354Ssam "%s", "challenge mismatch"); 1100178354Ssam vap->iv_stats.is_rx_auth_fail++; 1101178354Ssam estatus = IEEE80211_STATUS_CHALLENGE; 1102178354Ssam goto bad; 1103178354Ssam } 1104178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, 1105178354Ssam ni, "%s", "station authenticated (shared key)"); 1106178354Ssam ieee80211_node_authorize(ni); 1107178354Ssam break; 1108178354Ssam default: 1109178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1110178354Ssam ni->ni_macaddr, "shared key auth", 1111178354Ssam "bad seq %d", seq); 1112178354Ssam vap->iv_stats.is_rx_bad_auth++; 1113178354Ssam estatus = IEEE80211_STATUS_SEQUENCE; 1114178354Ssam goto bad; 1115178354Ssam } 1116178354Ssam IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, seq + 1); 1117178354Ssam return; 1118178354Ssambad: 1119178354Ssam /* 1120178354Ssam * Send an error response; but only when operating as an AP. 1121178354Ssam */ 1122178354Ssam /* XXX hack to workaround calling convention */ 1123178354Ssam ieee80211_send_error(ni, wh->i_addr2, 1124178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 1125178354Ssam (seq + 1) | (estatus<<16)); 1126178354Ssam} 1127178354Ssam 1128178354Ssam/* 1129178354Ssam * Convert a WPA cipher selector OUI to an internal 1130178354Ssam * cipher algorithm. Where appropriate we also 1131178354Ssam * record any key length. 1132178354Ssam */ 1133178354Ssamstatic int 1134178354Ssamwpa_cipher(const uint8_t *sel, uint8_t *keylen) 1135178354Ssam{ 1136178354Ssam#define WPA_SEL(x) (((x)<<24)|WPA_OUI) 1137178354Ssam uint32_t w = LE_READ_4(sel); 1138178354Ssam 1139178354Ssam switch (w) { 1140178354Ssam case WPA_SEL(WPA_CSE_NULL): 1141178354Ssam return IEEE80211_CIPHER_NONE; 1142178354Ssam case WPA_SEL(WPA_CSE_WEP40): 1143178354Ssam if (keylen) 1144178354Ssam *keylen = 40 / NBBY; 1145178354Ssam return IEEE80211_CIPHER_WEP; 1146178354Ssam case WPA_SEL(WPA_CSE_WEP104): 1147178354Ssam if (keylen) 1148178354Ssam *keylen = 104 / NBBY; 1149178354Ssam return IEEE80211_CIPHER_WEP; 1150178354Ssam case WPA_SEL(WPA_CSE_TKIP): 1151178354Ssam return IEEE80211_CIPHER_TKIP; 1152178354Ssam case WPA_SEL(WPA_CSE_CCMP): 1153178354Ssam return IEEE80211_CIPHER_AES_CCM; 1154178354Ssam } 1155178354Ssam return 32; /* NB: so 1<< is discarded */ 1156178354Ssam#undef WPA_SEL 1157178354Ssam} 1158178354Ssam 1159178354Ssam/* 1160178354Ssam * Convert a WPA key management/authentication algorithm 1161178354Ssam * to an internal code. 1162178354Ssam */ 1163178354Ssamstatic int 1164178354Ssamwpa_keymgmt(const uint8_t *sel) 1165178354Ssam{ 1166178354Ssam#define WPA_SEL(x) (((x)<<24)|WPA_OUI) 1167178354Ssam uint32_t w = LE_READ_4(sel); 1168178354Ssam 1169178354Ssam switch (w) { 1170178354Ssam case WPA_SEL(WPA_ASE_8021X_UNSPEC): 1171178354Ssam return WPA_ASE_8021X_UNSPEC; 1172178354Ssam case WPA_SEL(WPA_ASE_8021X_PSK): 1173178354Ssam return WPA_ASE_8021X_PSK; 1174178354Ssam case WPA_SEL(WPA_ASE_NONE): 1175178354Ssam return WPA_ASE_NONE; 1176178354Ssam } 1177178354Ssam return 0; /* NB: so is discarded */ 1178178354Ssam#undef WPA_SEL 1179178354Ssam} 1180178354Ssam 1181178354Ssam/* 1182178354Ssam * Parse a WPA information element to collect parameters. 1183178354Ssam * Note that we do not validate security parameters; that 1184178354Ssam * is handled by the authenticator; the parsing done here 1185178354Ssam * is just for internal use in making operational decisions. 1186178354Ssam */ 1187178354Ssamstatic int 1188178354Ssamieee80211_parse_wpa(struct ieee80211vap *vap, const uint8_t *frm, 1189178354Ssam struct ieee80211_rsnparms *rsn, const struct ieee80211_frame *wh) 1190178354Ssam{ 1191178354Ssam uint8_t len = frm[1]; 1192178354Ssam uint32_t w; 1193178354Ssam int n; 1194178354Ssam 1195178354Ssam /* 1196178354Ssam * Check the length once for fixed parts: OUI, type, 1197178354Ssam * version, mcast cipher, and 2 selector counts. 1198178354Ssam * Other, variable-length data, must be checked separately. 1199178354Ssam */ 1200178354Ssam if ((vap->iv_flags & IEEE80211_F_WPA1) == 0) { 1201178354Ssam IEEE80211_DISCARD_IE(vap, 1202178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1203178354Ssam wh, "WPA", "not WPA, flags 0x%x", vap->iv_flags); 1204178354Ssam return IEEE80211_REASON_IE_INVALID; 1205178354Ssam } 1206178354Ssam if (len < 14) { 1207178354Ssam IEEE80211_DISCARD_IE(vap, 1208178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1209178354Ssam wh, "WPA", "too short, len %u", len); 1210178354Ssam return IEEE80211_REASON_IE_INVALID; 1211178354Ssam } 1212178354Ssam frm += 6, len -= 4; /* NB: len is payload only */ 1213178354Ssam /* NB: iswapoui already validated the OUI and type */ 1214178354Ssam w = LE_READ_2(frm); 1215178354Ssam if (w != WPA_VERSION) { 1216178354Ssam IEEE80211_DISCARD_IE(vap, 1217178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1218178354Ssam wh, "WPA", "bad version %u", w); 1219178354Ssam return IEEE80211_REASON_IE_INVALID; 1220178354Ssam } 1221178354Ssam frm += 2, len -= 2; 1222178354Ssam 1223178354Ssam memset(rsn, 0, sizeof(*rsn)); 1224178354Ssam 1225178354Ssam /* multicast/group cipher */ 1226178354Ssam rsn->rsn_mcastcipher = wpa_cipher(frm, &rsn->rsn_mcastkeylen); 1227178354Ssam frm += 4, len -= 4; 1228178354Ssam 1229178354Ssam /* unicast ciphers */ 1230178354Ssam n = LE_READ_2(frm); 1231178354Ssam frm += 2, len -= 2; 1232178354Ssam if (len < n*4+2) { 1233178354Ssam IEEE80211_DISCARD_IE(vap, 1234178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1235178354Ssam wh, "WPA", "ucast cipher data too short; len %u, n %u", 1236178354Ssam len, n); 1237178354Ssam return IEEE80211_REASON_IE_INVALID; 1238178354Ssam } 1239178354Ssam w = 0; 1240178354Ssam for (; n > 0; n--) { 1241178354Ssam w |= 1<<wpa_cipher(frm, &rsn->rsn_ucastkeylen); 1242178354Ssam frm += 4, len -= 4; 1243178354Ssam } 1244178354Ssam if (w & (1<<IEEE80211_CIPHER_TKIP)) 1245178354Ssam rsn->rsn_ucastcipher = IEEE80211_CIPHER_TKIP; 1246178354Ssam else 1247178354Ssam rsn->rsn_ucastcipher = IEEE80211_CIPHER_AES_CCM; 1248178354Ssam 1249178354Ssam /* key management algorithms */ 1250178354Ssam n = LE_READ_2(frm); 1251178354Ssam frm += 2, len -= 2; 1252178354Ssam if (len < n*4) { 1253178354Ssam IEEE80211_DISCARD_IE(vap, 1254178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1255178354Ssam wh, "WPA", "key mgmt alg data too short; len %u, n %u", 1256178354Ssam len, n); 1257178354Ssam return IEEE80211_REASON_IE_INVALID; 1258178354Ssam } 1259178354Ssam w = 0; 1260178354Ssam for (; n > 0; n--) { 1261178354Ssam w |= wpa_keymgmt(frm); 1262178354Ssam frm += 4, len -= 4; 1263178354Ssam } 1264178354Ssam if (w & WPA_ASE_8021X_UNSPEC) 1265178354Ssam rsn->rsn_keymgmt = WPA_ASE_8021X_UNSPEC; 1266178354Ssam else 1267178354Ssam rsn->rsn_keymgmt = WPA_ASE_8021X_PSK; 1268178354Ssam 1269178354Ssam if (len > 2) /* optional capabilities */ 1270178354Ssam rsn->rsn_caps = LE_READ_2(frm); 1271178354Ssam 1272178354Ssam return 0; 1273178354Ssam} 1274178354Ssam 1275178354Ssam/* 1276178354Ssam * Convert an RSN cipher selector OUI to an internal 1277178354Ssam * cipher algorithm. Where appropriate we also 1278178354Ssam * record any key length. 1279178354Ssam */ 1280178354Ssamstatic int 1281178354Ssamrsn_cipher(const uint8_t *sel, uint8_t *keylen) 1282178354Ssam{ 1283178354Ssam#define RSN_SEL(x) (((x)<<24)|RSN_OUI) 1284178354Ssam uint32_t w = LE_READ_4(sel); 1285178354Ssam 1286178354Ssam switch (w) { 1287178354Ssam case RSN_SEL(RSN_CSE_NULL): 1288178354Ssam return IEEE80211_CIPHER_NONE; 1289178354Ssam case RSN_SEL(RSN_CSE_WEP40): 1290178354Ssam if (keylen) 1291178354Ssam *keylen = 40 / NBBY; 1292178354Ssam return IEEE80211_CIPHER_WEP; 1293178354Ssam case RSN_SEL(RSN_CSE_WEP104): 1294178354Ssam if (keylen) 1295178354Ssam *keylen = 104 / NBBY; 1296178354Ssam return IEEE80211_CIPHER_WEP; 1297178354Ssam case RSN_SEL(RSN_CSE_TKIP): 1298178354Ssam return IEEE80211_CIPHER_TKIP; 1299178354Ssam case RSN_SEL(RSN_CSE_CCMP): 1300178354Ssam return IEEE80211_CIPHER_AES_CCM; 1301178354Ssam case RSN_SEL(RSN_CSE_WRAP): 1302178354Ssam return IEEE80211_CIPHER_AES_OCB; 1303178354Ssam } 1304178354Ssam return 32; /* NB: so 1<< is discarded */ 1305178354Ssam#undef WPA_SEL 1306178354Ssam} 1307178354Ssam 1308178354Ssam/* 1309178354Ssam * Convert an RSN key management/authentication algorithm 1310178354Ssam * to an internal code. 1311178354Ssam */ 1312178354Ssamstatic int 1313178354Ssamrsn_keymgmt(const uint8_t *sel) 1314178354Ssam{ 1315178354Ssam#define RSN_SEL(x) (((x)<<24)|RSN_OUI) 1316178354Ssam uint32_t w = LE_READ_4(sel); 1317178354Ssam 1318178354Ssam switch (w) { 1319178354Ssam case RSN_SEL(RSN_ASE_8021X_UNSPEC): 1320178354Ssam return RSN_ASE_8021X_UNSPEC; 1321178354Ssam case RSN_SEL(RSN_ASE_8021X_PSK): 1322178354Ssam return RSN_ASE_8021X_PSK; 1323178354Ssam case RSN_SEL(RSN_ASE_NONE): 1324178354Ssam return RSN_ASE_NONE; 1325178354Ssam } 1326178354Ssam return 0; /* NB: so is discarded */ 1327178354Ssam#undef RSN_SEL 1328178354Ssam} 1329178354Ssam 1330178354Ssam/* 1331178354Ssam * Parse a WPA/RSN information element to collect parameters 1332178354Ssam * and validate the parameters against what has been 1333178354Ssam * configured for the system. 1334178354Ssam */ 1335178354Ssamstatic int 1336178354Ssamieee80211_parse_rsn(struct ieee80211vap *vap, const uint8_t *frm, 1337178354Ssam struct ieee80211_rsnparms *rsn, const struct ieee80211_frame *wh) 1338178354Ssam{ 1339178354Ssam uint8_t len = frm[1]; 1340178354Ssam uint32_t w; 1341178354Ssam int n; 1342178354Ssam 1343178354Ssam /* 1344178354Ssam * Check the length once for fixed parts: 1345178354Ssam * version, mcast cipher, and 2 selector counts. 1346178354Ssam * Other, variable-length data, must be checked separately. 1347178354Ssam */ 1348178354Ssam if ((vap->iv_flags & IEEE80211_F_WPA2) == 0) { 1349178354Ssam IEEE80211_DISCARD_IE(vap, 1350178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1351178354Ssam wh, "WPA", "not RSN, flags 0x%x", vap->iv_flags); 1352178354Ssam return IEEE80211_REASON_IE_INVALID; 1353178354Ssam } 1354178354Ssam if (len < 10) { 1355178354Ssam IEEE80211_DISCARD_IE(vap, 1356178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1357178354Ssam wh, "RSN", "too short, len %u", len); 1358178354Ssam return IEEE80211_REASON_IE_INVALID; 1359178354Ssam } 1360178354Ssam frm += 2; 1361178354Ssam w = LE_READ_2(frm); 1362178354Ssam if (w != RSN_VERSION) { 1363178354Ssam IEEE80211_DISCARD_IE(vap, 1364178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1365178354Ssam wh, "RSN", "bad version %u", w); 1366178354Ssam return IEEE80211_REASON_IE_INVALID; 1367178354Ssam } 1368178354Ssam frm += 2, len -= 2; 1369178354Ssam 1370178354Ssam memset(rsn, 0, sizeof(*rsn)); 1371178354Ssam 1372178354Ssam /* multicast/group cipher */ 1373178354Ssam rsn->rsn_mcastcipher = rsn_cipher(frm, &rsn->rsn_mcastkeylen); 1374178354Ssam frm += 4, len -= 4; 1375178354Ssam 1376178354Ssam /* unicast ciphers */ 1377178354Ssam n = LE_READ_2(frm); 1378178354Ssam frm += 2, len -= 2; 1379178354Ssam if (len < n*4+2) { 1380178354Ssam IEEE80211_DISCARD_IE(vap, 1381178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1382178354Ssam wh, "RSN", "ucast cipher data too short; len %u, n %u", 1383178354Ssam len, n); 1384178354Ssam return IEEE80211_REASON_IE_INVALID; 1385178354Ssam } 1386178354Ssam w = 0; 1387178354Ssam for (; n > 0; n--) { 1388178354Ssam w |= 1<<rsn_cipher(frm, &rsn->rsn_ucastkeylen); 1389178354Ssam frm += 4, len -= 4; 1390178354Ssam } 1391178354Ssam if (w & (1<<IEEE80211_CIPHER_TKIP)) 1392178354Ssam rsn->rsn_ucastcipher = IEEE80211_CIPHER_TKIP; 1393178354Ssam else 1394178354Ssam rsn->rsn_ucastcipher = IEEE80211_CIPHER_AES_CCM; 1395178354Ssam 1396178354Ssam /* key management algorithms */ 1397178354Ssam n = LE_READ_2(frm); 1398178354Ssam frm += 2, len -= 2; 1399178354Ssam if (len < n*4) { 1400178354Ssam IEEE80211_DISCARD_IE(vap, 1401178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1402178354Ssam wh, "RSN", "key mgmt alg data too short; len %u, n %u", 1403178354Ssam len, n); 1404178354Ssam return IEEE80211_REASON_IE_INVALID; 1405178354Ssam } 1406178354Ssam w = 0; 1407178354Ssam for (; n > 0; n--) { 1408178354Ssam w |= rsn_keymgmt(frm); 1409178354Ssam frm += 4, len -= 4; 1410178354Ssam } 1411178354Ssam if (w & RSN_ASE_8021X_UNSPEC) 1412178354Ssam rsn->rsn_keymgmt = RSN_ASE_8021X_UNSPEC; 1413178354Ssam else 1414178354Ssam rsn->rsn_keymgmt = RSN_ASE_8021X_PSK; 1415178354Ssam 1416178354Ssam /* optional RSN capabilities */ 1417178354Ssam if (len > 2) 1418178354Ssam rsn->rsn_caps = LE_READ_2(frm); 1419178354Ssam /* XXXPMKID */ 1420178354Ssam 1421178354Ssam return 0; 1422178354Ssam} 1423178354Ssam 1424178354Ssam/* 1425178354Ssam * WPA/802.11i assocation request processing. 1426178354Ssam */ 1427178354Ssamstatic int 1428178354Ssamwpa_assocreq(struct ieee80211_node *ni, struct ieee80211_rsnparms *rsnparms, 1429178354Ssam const struct ieee80211_frame *wh, const uint8_t *wpa, 1430178354Ssam const uint8_t *rsn, uint16_t capinfo) 1431178354Ssam{ 1432178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1433178354Ssam uint8_t reason; 1434178354Ssam int badwparsn; 1435178354Ssam 1436178354Ssam ni->ni_flags &= ~(IEEE80211_NODE_WPS|IEEE80211_NODE_TSN); 1437178354Ssam if (wpa == NULL && rsn == NULL) { 1438178354Ssam if (vap->iv_flags_ext & IEEE80211_FEXT_WPS) { 1439178354Ssam /* 1440178354Ssam * W-Fi Protected Setup (WPS) permits 1441178354Ssam * clients to associate and pass EAPOL frames 1442178354Ssam * to establish initial credentials. 1443178354Ssam */ 1444178354Ssam ni->ni_flags |= IEEE80211_NODE_WPS; 1445178354Ssam return 1; 1446178354Ssam } 1447178354Ssam if ((vap->iv_flags_ext & IEEE80211_FEXT_TSN) && 1448178354Ssam (capinfo & IEEE80211_CAPINFO_PRIVACY)) { 1449178354Ssam /* 1450178354Ssam * Transitional Security Network. Permits clients 1451178354Ssam * to associate and use WEP while WPA is configured. 1452178354Ssam */ 1453178354Ssam ni->ni_flags |= IEEE80211_NODE_TSN; 1454178354Ssam return 1; 1455178354Ssam } 1456178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA, 1457178354Ssam wh, NULL, "%s", "no WPA/RSN IE in association request"); 1458178354Ssam vap->iv_stats.is_rx_assoc_badwpaie++; 1459178354Ssam reason = IEEE80211_REASON_IE_INVALID; 1460178354Ssam goto bad; 1461178354Ssam } 1462178354Ssam /* assert right association security credentials */ 1463178354Ssam badwparsn = 0; /* NB: to silence compiler */ 1464178354Ssam switch (vap->iv_flags & IEEE80211_F_WPA) { 1465178354Ssam case IEEE80211_F_WPA1: 1466178354Ssam badwparsn = (wpa == NULL); 1467178354Ssam break; 1468178354Ssam case IEEE80211_F_WPA2: 1469178354Ssam badwparsn = (rsn == NULL); 1470178354Ssam break; 1471178354Ssam case IEEE80211_F_WPA1|IEEE80211_F_WPA2: 1472178354Ssam badwparsn = (wpa == NULL && rsn == NULL); 1473178354Ssam break; 1474178354Ssam } 1475178354Ssam if (badwparsn) { 1476178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA, 1477178354Ssam wh, NULL, 1478178354Ssam "%s", "missing WPA/RSN IE in association request"); 1479178354Ssam vap->iv_stats.is_rx_assoc_badwpaie++; 1480178354Ssam reason = IEEE80211_REASON_IE_INVALID; 1481178354Ssam goto bad; 1482178354Ssam } 1483178354Ssam /* 1484178354Ssam * Parse WPA/RSN information element. 1485178354Ssam */ 1486178354Ssam if (wpa != NULL) 1487178354Ssam reason = ieee80211_parse_wpa(vap, wpa, rsnparms, wh); 1488178354Ssam else 1489178354Ssam reason = ieee80211_parse_rsn(vap, rsn, rsnparms, wh); 1490178354Ssam if (reason != 0) { 1491178354Ssam /* XXX distinguish WPA/RSN? */ 1492178354Ssam vap->iv_stats.is_rx_assoc_badwpaie++; 1493178354Ssam goto bad; 1494178354Ssam } 1495178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA, ni, 1496178354Ssam "%s ie: mc %u/%u uc %u/%u key %u caps 0x%x", 1497178354Ssam wpa != NULL ? "WPA" : "RSN", 1498178354Ssam rsnparms->rsn_mcastcipher, rsnparms->rsn_mcastkeylen, 1499178354Ssam rsnparms->rsn_ucastcipher, rsnparms->rsn_ucastkeylen, 1500178354Ssam rsnparms->rsn_keymgmt, rsnparms->rsn_caps); 1501178354Ssam 1502178354Ssam return 1; 1503178354Ssambad: 1504178354Ssam ieee80211_node_deauth(ni, reason); 1505178354Ssam return 0; 1506178354Ssam} 1507178354Ssam 1508178354Ssam/* XXX find a better place for definition */ 1509178354Ssamstruct l2_update_frame { 1510178354Ssam struct ether_header eh; 1511178354Ssam uint8_t dsap; 1512178354Ssam uint8_t ssap; 1513178354Ssam uint8_t control; 1514178354Ssam uint8_t xid[3]; 1515178354Ssam} __packed; 1516178354Ssam 1517178354Ssam/* 1518178354Ssam * Deliver a TGf L2UF frame on behalf of a station. 1519178354Ssam * This primes any bridge when the station is roaming 1520178354Ssam * between ap's on the same wired network. 1521178354Ssam */ 1522178354Ssamstatic void 1523178354Ssamieee80211_deliver_l2uf(struct ieee80211_node *ni) 1524178354Ssam{ 1525178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1526178354Ssam struct ifnet *ifp = vap->iv_ifp; 1527178354Ssam struct mbuf *m; 1528178354Ssam struct l2_update_frame *l2uf; 1529178354Ssam struct ether_header *eh; 1530178354Ssam 1531178354Ssam m = m_gethdr(M_NOWAIT, MT_DATA); 1532178354Ssam if (m == NULL) { 1533178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 1534178354Ssam "%s", "no mbuf for l2uf frame"); 1535178354Ssam vap->iv_stats.is_rx_nobuf++; /* XXX not right */ 1536178354Ssam return; 1537178354Ssam } 1538178354Ssam l2uf = mtod(m, struct l2_update_frame *); 1539178354Ssam eh = &l2uf->eh; 1540178354Ssam /* dst: Broadcast address */ 1541178354Ssam IEEE80211_ADDR_COPY(eh->ether_dhost, ifp->if_broadcastaddr); 1542178354Ssam /* src: associated STA */ 1543178354Ssam IEEE80211_ADDR_COPY(eh->ether_shost, ni->ni_macaddr); 1544178354Ssam eh->ether_type = htons(sizeof(*l2uf) - sizeof(*eh)); 1545178354Ssam 1546178354Ssam l2uf->dsap = 0; 1547178354Ssam l2uf->ssap = 0; 1548178354Ssam l2uf->control = 0xf5; 1549178354Ssam l2uf->xid[0] = 0x81; 1550178354Ssam l2uf->xid[1] = 0x80; 1551178354Ssam l2uf->xid[2] = 0x00; 1552178354Ssam 1553178354Ssam m->m_pkthdr.len = m->m_len = sizeof(*l2uf); 1554178354Ssam hostap_deliver_data(vap, ni, m); 1555178354Ssam} 1556178354Ssam 1557178354Ssamstatic void 1558178354Ssamratesetmismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh, 1559178354Ssam int reassoc, int resp, const char *tag, int rate) 1560178354Ssam{ 1561178354Ssam IEEE80211_NOTE_MAC(ni->ni_vap, IEEE80211_MSG_ANY, wh->i_addr2, 1562178354Ssam "deny %s request, %s rate set mismatch, rate/MCS %d", 1563178354Ssam reassoc ? "reassoc" : "assoc", tag, rate & IEEE80211_RATE_VAL); 1564178354Ssam IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_BASIC_RATE); 1565178354Ssam ieee80211_node_leave(ni); 1566178354Ssam} 1567178354Ssam 1568178354Ssamstatic void 1569178354Ssamcapinfomismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh, 1570178354Ssam int reassoc, int resp, const char *tag, int capinfo) 1571178354Ssam{ 1572178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1573178354Ssam 1574178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ANY, wh->i_addr2, 1575178354Ssam "deny %s request, %s mismatch 0x%x", 1576178354Ssam reassoc ? "reassoc" : "assoc", tag, capinfo); 1577178354Ssam IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_CAPINFO); 1578178354Ssam ieee80211_node_leave(ni); 1579178354Ssam vap->iv_stats.is_rx_assoc_capmismatch++; 1580178354Ssam} 1581178354Ssam 1582178354Ssamstatic void 1583178354Ssamhtcapmismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh, 1584178354Ssam int reassoc, int resp) 1585178354Ssam{ 1586178354Ssam IEEE80211_NOTE_MAC(ni->ni_vap, IEEE80211_MSG_ANY, wh->i_addr2, 1587178354Ssam "deny %s request, %s missing HT ie", reassoc ? "reassoc" : "assoc"); 1588178354Ssam /* XXX no better code */ 1589178354Ssam IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_OTHER); 1590178354Ssam ieee80211_node_leave(ni); 1591178354Ssam} 1592178354Ssam 1593178354Ssamstatic void 1594178354Ssamauthalgreject(struct ieee80211_node *ni, const struct ieee80211_frame *wh, 1595178354Ssam int algo, int seq, int status) 1596178354Ssam{ 1597178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1598178354Ssam 1599178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1600178354Ssam wh, NULL, "unsupported alg %d", algo); 1601178354Ssam vap->iv_stats.is_rx_auth_unsupported++; 1602178354Ssam ieee80211_send_error(ni, wh->i_addr2, IEEE80211_FC0_SUBTYPE_AUTH, 1603178354Ssam seq | (status << 16)); 1604178354Ssam} 1605178354Ssam 1606178354Ssamstatic __inline int 1607178354Ssamishtmixed(const uint8_t *ie) 1608178354Ssam{ 1609178354Ssam const struct ieee80211_ie_htinfo *ht = 1610178354Ssam (const struct ieee80211_ie_htinfo *) ie; 1611178354Ssam return (ht->hi_byte2 & IEEE80211_HTINFO_OPMODE) == 1612178354Ssam IEEE80211_HTINFO_OPMODE_MIXED; 1613178354Ssam} 1614178354Ssam 1615178354Ssamstatic int 1616178354Ssamis11bclient(const uint8_t *rates, const uint8_t *xrates) 1617178354Ssam{ 1618178354Ssam static const uint32_t brates = (1<<2*1)|(1<<2*2)|(1<<11)|(1<<2*11); 1619178354Ssam int i; 1620178354Ssam 1621178354Ssam /* NB: the 11b clients we care about will not have xrates */ 1622178354Ssam if (xrates != NULL || rates == NULL) 1623178354Ssam return 0; 1624178354Ssam for (i = 0; i < rates[1]; i++) { 1625178354Ssam int r = rates[2+i] & IEEE80211_RATE_VAL; 1626178354Ssam if (r > 2*11 || ((1<<r) & brates) == 0) 1627178354Ssam return 0; 1628178354Ssam } 1629178354Ssam return 1; 1630178354Ssam} 1631178354Ssam 1632178354Ssamstatic void 1633178354Ssamhostap_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, 1634178354Ssam int subtype, int rssi, int noise, uint32_t rstamp) 1635178354Ssam{ 1636178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1637178354Ssam struct ieee80211com *ic = ni->ni_ic; 1638178354Ssam struct ieee80211_frame *wh; 1639178354Ssam uint8_t *frm, *efrm, *sfrm; 1640178354Ssam uint8_t *ssid, *rates, *xrates, *wpa, *rsn, *wme, *ath, *htcap; 1641178354Ssam int reassoc, resp; 1642178354Ssam uint8_t rate; 1643178354Ssam 1644178354Ssam wh = mtod(m0, struct ieee80211_frame *); 1645178354Ssam frm = (uint8_t *)&wh[1]; 1646178354Ssam efrm = mtod(m0, uint8_t *) + m0->m_len; 1647178354Ssam switch (subtype) { 1648178354Ssam case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1649178354Ssam case IEEE80211_FC0_SUBTYPE_BEACON: { 1650178354Ssam struct ieee80211_scanparams scan; 1651178354Ssam /* 1652178354Ssam * We process beacon/probe response frames when scanning; 1653178354Ssam * otherwise we check beacon frames for overlapping non-ERP 1654178354Ssam * BSS in 11g and/or overlapping legacy BSS when in HT. 1655178354Ssam */ 1656178354Ssam if ((ic->ic_flags & IEEE80211_F_SCAN) == 0 && 1657178354Ssam subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP) { 1658178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1659178354Ssam return; 1660178354Ssam } 1661178354Ssam /* NB: accept off-channel frames */ 1662178354Ssam if (ieee80211_parse_beacon(ni, m0, &scan) &~ IEEE80211_BPARSE_OFFCHAN) 1663178354Ssam return; 1664178354Ssam /* 1665178354Ssam * Count frame now that we know it's to be processed. 1666178354Ssam */ 1667178354Ssam if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1668178354Ssam vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1669178354Ssam IEEE80211_NODE_STAT(ni, rx_beacons); 1670178354Ssam } else 1671178354Ssam IEEE80211_NODE_STAT(ni, rx_proberesp); 1672178354Ssam /* 1673178354Ssam * If scanning, just pass information to the scan module. 1674178354Ssam */ 1675178354Ssam if (ic->ic_flags & IEEE80211_F_SCAN) { 1676178354Ssam if (scan.status == 0 && /* NB: on channel */ 1677178354Ssam (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN)) { 1678178354Ssam /* 1679178354Ssam * Actively scanning a channel marked passive; 1680178354Ssam * send a probe request now that we know there 1681178354Ssam * is 802.11 traffic present. 1682178354Ssam * 1683178354Ssam * XXX check if the beacon we recv'd gives 1684178354Ssam * us what we need and suppress the probe req 1685178354Ssam */ 1686178354Ssam ieee80211_probe_curchan(vap, 1); 1687178354Ssam ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 1688178354Ssam } 1689178354Ssam ieee80211_add_scan(vap, &scan, wh, 1690178354Ssam subtype, rssi, noise, rstamp); 1691178354Ssam return; 1692178354Ssam } 1693178354Ssam /* 1694178354Ssam * Check beacon for overlapping bss w/ non ERP stations. 1695178354Ssam * If we detect one and protection is configured but not 1696178354Ssam * enabled, enable it and start a timer that'll bring us 1697178354Ssam * out if we stop seeing the bss. 1698178354Ssam */ 1699178354Ssam if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 1700178354Ssam scan.status == 0 && /* NB: on-channel */ 1701178354Ssam ((scan.erp & 0x100) == 0 || /* NB: no ERP, 11b sta*/ 1702178354Ssam (scan.erp & IEEE80211_ERP_NON_ERP_PRESENT))) { 1703178354Ssam ic->ic_lastnonerp = ticks; 1704178354Ssam ic->ic_flags_ext |= IEEE80211_FEXT_NONERP_PR; 1705178354Ssam if (ic->ic_protmode != IEEE80211_PROT_NONE && 1706178354Ssam (ic->ic_flags & IEEE80211_F_USEPROT) == 0) { 1707178354Ssam IEEE80211_NOTE_FRAME(vap, 1708178354Ssam IEEE80211_MSG_ASSOC, wh, 1709178354Ssam "non-ERP present on channel %d " 1710178354Ssam "(saw erp 0x%x from channel %d), " 1711178354Ssam "enable use of protection", 1712178354Ssam ic->ic_curchan->ic_ieee, 1713178354Ssam scan.erp, scan.chan); 1714178354Ssam ic->ic_flags |= IEEE80211_F_USEPROT; 1715178354Ssam ieee80211_notify_erp(ic); 1716178354Ssam } 1717178354Ssam } 1718178354Ssam /* 1719178354Ssam * Check beacon for non-HT station on HT channel 1720178354Ssam * and update HT BSS occupancy as appropriate. 1721178354Ssam */ 1722178354Ssam if (IEEE80211_IS_CHAN_HT(ic->ic_curchan)) { 1723178354Ssam if (scan.status & IEEE80211_BPARSE_OFFCHAN) { 1724178354Ssam /* 1725178354Ssam * Off control channel; only check frames 1726178354Ssam * that come in the extension channel when 1727178354Ssam * operating w/ HT40. 1728178354Ssam */ 1729178354Ssam if (!IEEE80211_IS_CHAN_HT40(ic->ic_curchan)) 1730178354Ssam break; 1731178354Ssam if (scan.chan != ic->ic_curchan->ic_extieee) 1732178354Ssam break; 1733178354Ssam } 1734178354Ssam if (scan.htinfo == NULL) { 1735178354Ssam ieee80211_htprot_update(ic, 1736178354Ssam IEEE80211_HTINFO_OPMODE_PROTOPT | 1737178354Ssam IEEE80211_HTINFO_NONHT_PRESENT); 1738178354Ssam } else if (ishtmixed(scan.htinfo)) { 1739178354Ssam /* XXX? take NONHT_PRESENT from beacon? */ 1740178354Ssam ieee80211_htprot_update(ic, 1741178354Ssam IEEE80211_HTINFO_OPMODE_MIXED | 1742178354Ssam IEEE80211_HTINFO_NONHT_PRESENT); 1743178354Ssam } 1744178354Ssam } 1745178354Ssam break; 1746178354Ssam } 1747178354Ssam 1748178354Ssam case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 1749178354Ssam if (vap->iv_state != IEEE80211_S_RUN) { 1750178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1751178354Ssam return; 1752178354Ssam } 1753178354Ssam /* 1754178354Ssam * prreq frame format 1755178354Ssam * [tlv] ssid 1756178354Ssam * [tlv] supported rates 1757178354Ssam * [tlv] extended supported rates 1758178354Ssam */ 1759178354Ssam ssid = rates = xrates = NULL; 1760178354Ssam sfrm = frm; 1761178354Ssam while (efrm - frm > 1) { 1762178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 1763178354Ssam switch (*frm) { 1764178354Ssam case IEEE80211_ELEMID_SSID: 1765178354Ssam ssid = frm; 1766178354Ssam break; 1767178354Ssam case IEEE80211_ELEMID_RATES: 1768178354Ssam rates = frm; 1769178354Ssam break; 1770178354Ssam case IEEE80211_ELEMID_XRATES: 1771178354Ssam xrates = frm; 1772178354Ssam break; 1773178354Ssam } 1774178354Ssam frm += frm[1] + 2; 1775178354Ssam } 1776178354Ssam IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 1777178354Ssam if (xrates != NULL) 1778178354Ssam IEEE80211_VERIFY_ELEMENT(xrates, 1779178354Ssam IEEE80211_RATE_MAXSIZE - rates[1], return); 1780178354Ssam IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); 1781178354Ssam IEEE80211_VERIFY_SSID(vap->iv_bss, ssid, return); 1782178354Ssam if ((vap->iv_flags & IEEE80211_F_HIDESSID) && ssid[1] == 0) { 1783178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1784178354Ssam wh, NULL, 1785178354Ssam "%s", "no ssid with ssid suppression enabled"); 1786178354Ssam vap->iv_stats.is_rx_ssidmismatch++; /*XXX*/ 1787178354Ssam return; 1788178354Ssam } 1789178354Ssam 1790178354Ssam /* XXX find a better class or define it's own */ 1791178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2, 1792178354Ssam "%s", "recv probe req"); 1793178354Ssam /* 1794178354Ssam * Some legacy 11b clients cannot hack a complete 1795178354Ssam * probe response frame. When the request includes 1796178354Ssam * only a bare-bones rate set, communicate this to 1797178354Ssam * the transmit side. 1798178354Ssam */ 1799178354Ssam ieee80211_send_proberesp(vap, wh->i_addr2, 1800178354Ssam is11bclient(rates, xrates) ? IEEE80211_SEND_LEGACY_11B : 0); 1801178354Ssam break; 1802178354Ssam 1803178354Ssam case IEEE80211_FC0_SUBTYPE_AUTH: { 1804178354Ssam uint16_t algo, seq, status; 1805178354Ssam 1806178354Ssam if (vap->iv_state != IEEE80211_S_RUN) { 1807178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1808178354Ssam return; 1809178354Ssam } 1810178354Ssam if (!IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_bss->ni_bssid)) { 1811178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1812178354Ssam wh, NULL, "%s", "wrong bssid"); 1813178354Ssam vap->iv_stats.is_rx_wrongbss++; /*XXX unique stat?*/ 1814178354Ssam return; 1815178354Ssam } 1816178354Ssam /* 1817178354Ssam * auth frame format 1818178354Ssam * [2] algorithm 1819178354Ssam * [2] sequence 1820178354Ssam * [2] status 1821178354Ssam * [tlv*] challenge 1822178354Ssam */ 1823178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return); 1824178354Ssam algo = le16toh(*(uint16_t *)frm); 1825178354Ssam seq = le16toh(*(uint16_t *)(frm + 2)); 1826178354Ssam status = le16toh(*(uint16_t *)(frm + 4)); 1827178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr2, 1828178354Ssam "recv auth frame with algorithm %d seq %d", algo, seq); 1829178354Ssam /* 1830178354Ssam * Consult the ACL policy module if setup. 1831178354Ssam */ 1832178354Ssam if (vap->iv_acl != NULL && 1833178354Ssam !vap->iv_acl->iac_check(vap, wh->i_addr2)) { 1834178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1835178354Ssam wh, NULL, "%s", "disallowed by ACL"); 1836178354Ssam vap->iv_stats.is_rx_acl++; 1837178354Ssam ieee80211_send_error(ni, wh->i_addr2, 1838178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 1839178354Ssam (seq+1) | (IEEE80211_STATUS_UNSPECIFIED<<16)); 1840178354Ssam return; 1841178354Ssam } 1842178354Ssam if (vap->iv_flags & IEEE80211_F_COUNTERM) { 1843178354Ssam IEEE80211_DISCARD(vap, 1844178354Ssam IEEE80211_MSG_AUTH | IEEE80211_MSG_CRYPTO, 1845178354Ssam wh, NULL, "%s", "TKIP countermeasures enabled"); 1846178354Ssam vap->iv_stats.is_rx_auth_countermeasures++; 1847178354Ssam ieee80211_send_error(ni, wh->i_addr2, 1848178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 1849178354Ssam IEEE80211_REASON_MIC_FAILURE); 1850178354Ssam return; 1851178354Ssam } 1852178354Ssam if (algo == IEEE80211_AUTH_ALG_SHARED) 1853178354Ssam hostap_auth_shared(ni, wh, frm + 6, efrm, rssi, 1854178354Ssam noise, rstamp, seq, status); 1855178354Ssam else if (algo == IEEE80211_AUTH_ALG_OPEN) 1856178354Ssam hostap_auth_open(ni, wh, rssi, noise, rstamp, 1857178354Ssam seq, status); 1858178354Ssam else if (algo == IEEE80211_AUTH_ALG_LEAP) { 1859178354Ssam authalgreject(ni, wh, algo, 1860178354Ssam seq+1, IEEE80211_STATUS_ALG); 1861178354Ssam return; 1862178354Ssam } else { 1863178354Ssam /* 1864178354Ssam * We assume that an unknown algorithm is the result 1865178354Ssam * of a decryption failure on a shared key auth frame; 1866178354Ssam * return a status code appropriate for that instead 1867178354Ssam * of IEEE80211_STATUS_ALG. 1868178354Ssam * 1869178354Ssam * NB: a seq# of 4 is intentional; the decrypted 1870178354Ssam * frame likely has a bogus seq value. 1871178354Ssam */ 1872178354Ssam authalgreject(ni, wh, algo, 1873178354Ssam 4, IEEE80211_STATUS_CHALLENGE); 1874178354Ssam return; 1875178354Ssam } 1876178354Ssam break; 1877178354Ssam } 1878178354Ssam 1879178354Ssam case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 1880178354Ssam case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: { 1881178354Ssam uint16_t capinfo, lintval; 1882178354Ssam struct ieee80211_rsnparms rsnparms; 1883178354Ssam 1884178354Ssam if (vap->iv_state != IEEE80211_S_RUN) { 1885178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1886178354Ssam return; 1887178354Ssam } 1888178354Ssam if (!IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_bss->ni_bssid)) { 1889178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1890178354Ssam wh, NULL, "%s", "wrong bssid"); 1891178354Ssam vap->iv_stats.is_rx_assoc_bss++; 1892178354Ssam return; 1893178354Ssam } 1894178354Ssam if (subtype == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) { 1895178354Ssam reassoc = 1; 1896178354Ssam resp = IEEE80211_FC0_SUBTYPE_REASSOC_RESP; 1897178354Ssam } else { 1898178354Ssam reassoc = 0; 1899178354Ssam resp = IEEE80211_FC0_SUBTYPE_ASSOC_RESP; 1900178354Ssam } 1901178354Ssam if (ni == vap->iv_bss) { 1902178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ANY, wh->i_addr2, 1903178354Ssam "deny %s request, sta not authenticated", 1904178354Ssam reassoc ? "reassoc" : "assoc"); 1905178354Ssam ieee80211_send_error(ni, wh->i_addr2, 1906178354Ssam IEEE80211_FC0_SUBTYPE_DEAUTH, 1907178354Ssam IEEE80211_REASON_ASSOC_NOT_AUTHED); 1908178354Ssam vap->iv_stats.is_rx_assoc_notauth++; 1909178354Ssam return; 1910178354Ssam } 1911178354Ssam 1912178354Ssam /* 1913178354Ssam * asreq frame format 1914178354Ssam * [2] capability information 1915178354Ssam * [2] listen interval 1916178354Ssam * [6*] current AP address (reassoc only) 1917178354Ssam * [tlv] ssid 1918178354Ssam * [tlv] supported rates 1919178354Ssam * [tlv] extended supported rates 1920178354Ssam * [tlv] WPA or RSN 1921178354Ssam * [tlv] HT capabilities 1922178354Ssam * [tlv] Atheros capabilities 1923178354Ssam */ 1924178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, (reassoc ? 10 : 4), return); 1925178354Ssam capinfo = le16toh(*(uint16_t *)frm); frm += 2; 1926178354Ssam lintval = le16toh(*(uint16_t *)frm); frm += 2; 1927178354Ssam if (reassoc) 1928178354Ssam frm += 6; /* ignore current AP info */ 1929178354Ssam ssid = rates = xrates = wpa = rsn = wme = ath = htcap = NULL; 1930178354Ssam sfrm = frm; 1931178354Ssam while (efrm - frm > 1) { 1932178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 1933178354Ssam switch (*frm) { 1934178354Ssam case IEEE80211_ELEMID_SSID: 1935178354Ssam ssid = frm; 1936178354Ssam break; 1937178354Ssam case IEEE80211_ELEMID_RATES: 1938178354Ssam rates = frm; 1939178354Ssam break; 1940178354Ssam case IEEE80211_ELEMID_XRATES: 1941178354Ssam xrates = frm; 1942178354Ssam break; 1943178354Ssam case IEEE80211_ELEMID_RSN: 1944178354Ssam rsn = frm; 1945178354Ssam break; 1946178354Ssam case IEEE80211_ELEMID_HTCAP: 1947178354Ssam htcap = frm; 1948178354Ssam break; 1949178354Ssam case IEEE80211_ELEMID_VENDOR: 1950178354Ssam if (iswpaoui(frm)) 1951178354Ssam wpa = frm; 1952178354Ssam else if (iswmeinfo(frm)) 1953178354Ssam wme = frm; 1954190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 1955178354Ssam else if (isatherosoui(frm)) 1956178354Ssam ath = frm; 1957190391Ssam#endif 1958178354Ssam else if (vap->iv_flags_ext & IEEE80211_FEXT_HTCOMPAT) { 1959178354Ssam if (ishtcapoui(frm) && htcap == NULL) 1960178354Ssam htcap = frm; 1961178354Ssam } 1962178354Ssam break; 1963178354Ssam } 1964178354Ssam frm += frm[1] + 2; 1965178354Ssam } 1966178354Ssam IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 1967178354Ssam if (xrates != NULL) 1968178354Ssam IEEE80211_VERIFY_ELEMENT(xrates, 1969178354Ssam IEEE80211_RATE_MAXSIZE - rates[1], return); 1970178354Ssam IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); 1971178354Ssam IEEE80211_VERIFY_SSID(vap->iv_bss, ssid, return); 1972178354Ssam if (htcap != NULL) { 1973178354Ssam IEEE80211_VERIFY_LENGTH(htcap[1], 1974178354Ssam htcap[0] == IEEE80211_ELEMID_VENDOR ? 1975178354Ssam 4 + sizeof(struct ieee80211_ie_htcap)-2 : 1976178354Ssam sizeof(struct ieee80211_ie_htcap)-2, 1977178354Ssam return); /* XXX just NULL out? */ 1978178354Ssam } 1979178354Ssam 1980178354Ssam if ((vap->iv_flags & IEEE80211_F_WPA) && 1981178354Ssam !wpa_assocreq(ni, &rsnparms, wh, wpa, rsn, capinfo)) 1982178354Ssam return; 1983178354Ssam /* discard challenge after association */ 1984178354Ssam if (ni->ni_challenge != NULL) { 1985186302Ssam free(ni->ni_challenge, M_80211_NODE); 1986178354Ssam ni->ni_challenge = NULL; 1987178354Ssam } 1988178354Ssam /* NB: 802.11 spec says to ignore station's privacy bit */ 1989178354Ssam if ((capinfo & IEEE80211_CAPINFO_ESS) == 0) { 1990178354Ssam capinfomismatch(ni, wh, reassoc, resp, 1991178354Ssam "capability", capinfo); 1992178354Ssam return; 1993178354Ssam } 1994178354Ssam /* 1995178354Ssam * Disallow re-associate w/ invalid slot time setting. 1996178354Ssam */ 1997178354Ssam if (ni->ni_associd != 0 && 1998178354Ssam IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 1999178354Ssam ((ni->ni_capinfo ^ capinfo) & IEEE80211_CAPINFO_SHORT_SLOTTIME)) { 2000178354Ssam capinfomismatch(ni, wh, reassoc, resp, 2001178354Ssam "slot time", capinfo); 2002178354Ssam return; 2003178354Ssam } 2004178354Ssam rate = ieee80211_setup_rates(ni, rates, xrates, 2005178354Ssam IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 2006178354Ssam IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 2007178354Ssam if (rate & IEEE80211_RATE_BASIC) { 2008178354Ssam ratesetmismatch(ni, wh, reassoc, resp, "legacy", rate); 2009178354Ssam vap->iv_stats.is_rx_assoc_norate++; 2010178354Ssam return; 2011178354Ssam } 2012178354Ssam /* 2013178354Ssam * If constrained to 11g-only stations reject an 2014178354Ssam * 11b-only station. We cheat a bit here by looking 2015178354Ssam * at the max negotiated xmit rate and assuming anyone 2016178354Ssam * with a best rate <24Mb/s is an 11b station. 2017178354Ssam */ 2018178354Ssam if ((vap->iv_flags & IEEE80211_F_PUREG) && rate < 48) { 2019178354Ssam ratesetmismatch(ni, wh, reassoc, resp, "11g", rate); 2020178354Ssam vap->iv_stats.is_rx_assoc_norate++; 2021178354Ssam return; 2022178354Ssam } 2023178354Ssam /* 2024178354Ssam * Do HT rate set handling and setup HT node state. 2025178354Ssam */ 2026178354Ssam ni->ni_chan = vap->iv_bss->ni_chan; 2027178354Ssam if (IEEE80211_IS_CHAN_HT(ni->ni_chan) && htcap != NULL) { 2028178354Ssam rate = ieee80211_setup_htrates(ni, htcap, 2029178354Ssam IEEE80211_F_DOFMCS | IEEE80211_F_DONEGO | 2030178354Ssam IEEE80211_F_DOBRS); 2031178354Ssam if (rate & IEEE80211_RATE_BASIC) { 2032178354Ssam ratesetmismatch(ni, wh, reassoc, resp, 2033178354Ssam "HT", rate); 2034178354Ssam vap->iv_stats.is_ht_assoc_norate++; 2035178354Ssam return; 2036178354Ssam } 2037183254Ssam ieee80211_ht_node_init(ni); 2038183254Ssam ieee80211_ht_updatehtcap(ni, htcap); 2039178354Ssam } else if (ni->ni_flags & IEEE80211_NODE_HT) 2040178354Ssam ieee80211_ht_node_cleanup(ni); 2041178354Ssam /* 2042178354Ssam * Allow AMPDU operation only with unencrypted traffic 2043178354Ssam * or AES-CCM; the 11n spec only specifies these ciphers 2044178354Ssam * so permitting any others is undefined and can lead 2045178354Ssam * to interoperability problems. 2046178354Ssam */ 2047178354Ssam if ((ni->ni_flags & IEEE80211_NODE_HT) && 2048178354Ssam (((vap->iv_flags & IEEE80211_F_WPA) && 2049178354Ssam rsnparms.rsn_ucastcipher != IEEE80211_CIPHER_AES_CCM) || 2050178354Ssam (vap->iv_flags & (IEEE80211_F_WPA|IEEE80211_F_PRIVACY)) == IEEE80211_F_PRIVACY)) { 2051178354Ssam IEEE80211_NOTE(vap, 2052178354Ssam IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni, 2053178354Ssam "disallow HT use because WEP or TKIP requested, " 2054178354Ssam "capinfo 0x%x ucastcipher %d", capinfo, 2055178354Ssam rsnparms.rsn_ucastcipher); 2056178354Ssam ieee80211_ht_node_cleanup(ni); 2057178354Ssam vap->iv_stats.is_ht_assoc_downgrade++; 2058178354Ssam } 2059178354Ssam /* 2060178354Ssam * If constrained to 11n-only stations reject legacy stations. 2061178354Ssam */ 2062178354Ssam if ((vap->iv_flags_ext & IEEE80211_FEXT_PUREN) && 2063178354Ssam (ni->ni_flags & IEEE80211_NODE_HT) == 0) { 2064178354Ssam htcapmismatch(ni, wh, reassoc, resp); 2065178354Ssam vap->iv_stats.is_ht_assoc_nohtcap++; 2066178354Ssam return; 2067178354Ssam } 2068178354Ssam IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 2069178354Ssam ni->ni_noise = noise; 2070178354Ssam ni->ni_rstamp = rstamp; 2071178354Ssam ni->ni_intval = lintval; 2072178354Ssam ni->ni_capinfo = capinfo; 2073178354Ssam ni->ni_fhdwell = vap->iv_bss->ni_fhdwell; 2074178354Ssam ni->ni_fhindex = vap->iv_bss->ni_fhindex; 2075178354Ssam /* 2076178354Ssam * Store the IEs. 2077178354Ssam * XXX maybe better to just expand 2078178354Ssam */ 2079178354Ssam if (ieee80211_ies_init(&ni->ni_ies, sfrm, efrm - sfrm)) { 2080178354Ssam#define setie(_ie, _off) ieee80211_ies_setie(ni->ni_ies, _ie, _off) 2081178354Ssam if (wpa != NULL) 2082178354Ssam setie(wpa_ie, wpa - sfrm); 2083178354Ssam if (rsn != NULL) 2084178354Ssam setie(rsn_ie, rsn - sfrm); 2085178354Ssam if (htcap != NULL) 2086178354Ssam setie(htcap_ie, htcap - sfrm); 2087178354Ssam if (wme != NULL) { 2088178354Ssam setie(wme_ie, wme - sfrm); 2089178354Ssam /* 2090178354Ssam * Mark node as capable of QoS. 2091178354Ssam */ 2092178354Ssam ni->ni_flags |= IEEE80211_NODE_QOS; 2093178354Ssam } else 2094178354Ssam ni->ni_flags &= ~IEEE80211_NODE_QOS; 2095190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 2096178354Ssam if (ath != NULL) { 2097178354Ssam setie(ath_ie, ath - sfrm); 2098178354Ssam /* 2099178354Ssam * Parse ATH station parameters. 2100178354Ssam */ 2101178354Ssam ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 2102178354Ssam } else 2103190391Ssam#endif 2104178354Ssam ni->ni_ath_flags = 0; 2105178354Ssam#undef setie 2106178354Ssam } else { 2107178354Ssam ni->ni_flags &= ~IEEE80211_NODE_QOS; 2108178354Ssam ni->ni_ath_flags = 0; 2109178354Ssam } 2110178354Ssam ieee80211_node_join(ni, resp); 2111178354Ssam ieee80211_deliver_l2uf(ni); 2112178354Ssam break; 2113178354Ssam } 2114178354Ssam 2115178354Ssam case IEEE80211_FC0_SUBTYPE_DEAUTH: 2116178354Ssam case IEEE80211_FC0_SUBTYPE_DISASSOC: { 2117178354Ssam uint16_t reason; 2118178354Ssam 2119178354Ssam if (vap->iv_state != IEEE80211_S_RUN || 2120178354Ssam /* NB: can happen when in promiscuous mode */ 2121178354Ssam !IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) { 2122178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 2123178354Ssam break; 2124178354Ssam } 2125178354Ssam /* 2126178354Ssam * deauth/disassoc frame format 2127178354Ssam * [2] reason 2128178354Ssam */ 2129178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return); 2130178354Ssam reason = le16toh(*(uint16_t *)frm); 2131178354Ssam if (subtype == IEEE80211_FC0_SUBTYPE_DEAUTH) { 2132178354Ssam vap->iv_stats.is_rx_deauth++; 2133178354Ssam IEEE80211_NODE_STAT(ni, rx_deauth); 2134178354Ssam } else { 2135178354Ssam vap->iv_stats.is_rx_disassoc++; 2136178354Ssam IEEE80211_NODE_STAT(ni, rx_disassoc); 2137178354Ssam } 2138178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni, 2139178354Ssam "recv %s (reason %d)", ieee80211_mgt_subtype_name[subtype >> 2140178354Ssam IEEE80211_FC0_SUBTYPE_SHIFT], reason); 2141178354Ssam if (ni != vap->iv_bss) 2142178354Ssam ieee80211_node_leave(ni); 2143178354Ssam break; 2144178354Ssam } 2145178354Ssam 2146178354Ssam case IEEE80211_FC0_SUBTYPE_ACTION: 2147178354Ssam if (vap->iv_state == IEEE80211_S_RUN) { 2148178354Ssam if (ieee80211_parse_action(ni, m0) == 0) 2149178354Ssam ic->ic_recv_action(ni, frm, efrm); 2150178354Ssam } else 2151178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 2152178354Ssam break; 2153178354Ssam 2154178354Ssam case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 2155178354Ssam case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 2156178354Ssam default: 2157178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 2158178354Ssam wh, "mgt", "subtype 0x%x not handled", subtype); 2159178354Ssam vap->iv_stats.is_rx_badsubtype++; 2160178354Ssam break; 2161178354Ssam } 2162178354Ssam} 2163178354Ssam 2164178354Ssam/* 2165178354Ssam * Process a received ps-poll frame. 2166178354Ssam */ 2167178354Ssamstatic void 2168178354Ssamhostap_recv_pspoll(struct ieee80211_node *ni, struct mbuf *m0) 2169178354Ssam{ 2170178354Ssam struct ieee80211vap *vap = ni->ni_vap; 2171178354Ssam struct ieee80211_frame_min *wh; 2172184288Ssam struct ifnet *ifp; 2173178354Ssam struct mbuf *m; 2174178354Ssam uint16_t aid; 2175178354Ssam int qlen; 2176178354Ssam 2177178354Ssam wh = mtod(m0, struct ieee80211_frame_min *); 2178178354Ssam if (ni->ni_associd == 0) { 2179178354Ssam IEEE80211_DISCARD(vap, 2180178354Ssam IEEE80211_MSG_POWER | IEEE80211_MSG_DEBUG, 2181178354Ssam (struct ieee80211_frame *) wh, NULL, 2182178354Ssam "%s", "unassociated station"); 2183178354Ssam vap->iv_stats.is_ps_unassoc++; 2184178354Ssam IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, 2185178354Ssam IEEE80211_REASON_NOT_ASSOCED); 2186178354Ssam return; 2187178354Ssam } 2188178354Ssam 2189178354Ssam aid = le16toh(*(uint16_t *)wh->i_dur); 2190178354Ssam if (aid != ni->ni_associd) { 2191178354Ssam IEEE80211_DISCARD(vap, 2192178354Ssam IEEE80211_MSG_POWER | IEEE80211_MSG_DEBUG, 2193178354Ssam (struct ieee80211_frame *) wh, NULL, 2194178354Ssam "aid mismatch: sta aid 0x%x poll aid 0x%x", 2195178354Ssam ni->ni_associd, aid); 2196178354Ssam vap->iv_stats.is_ps_badaid++; 2197180837Ssam /* 2198180837Ssam * NB: We used to deauth the station but it turns out 2199180837Ssam * the Blackberry Curve 8230 (and perhaps other devices) 2200180837Ssam * sometimes send the wrong AID when WME is negotiated. 2201180837Ssam * Being more lenient here seems ok as we already check 2202180837Ssam * the station is associated and we only return frames 2203180837Ssam * queued for the station (i.e. we don't use the AID). 2204180837Ssam */ 2205178354Ssam return; 2206178354Ssam } 2207178354Ssam 2208178354Ssam /* Okay, take the first queued packet and put it out... */ 2209184288Ssam m = ieee80211_node_psq_dequeue(ni, &qlen); 2210178354Ssam if (m == NULL) { 2211178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_POWER, wh->i_addr2, 2212178354Ssam "%s", "recv ps-poll, but queue empty"); 2213178354Ssam ieee80211_send_nulldata(ieee80211_ref_node(ni)); 2214178354Ssam vap->iv_stats.is_ps_qempty++; /* XXX node stat */ 2215178354Ssam if (vap->iv_set_tim != NULL) 2216178354Ssam vap->iv_set_tim(ni, 0); /* just in case */ 2217178354Ssam return; 2218178354Ssam } 2219178354Ssam /* 2220178354Ssam * If there are more packets, set the more packets bit 2221178354Ssam * in the packet dispatched to the station; otherwise 2222178354Ssam * turn off the TIM bit. 2223178354Ssam */ 2224178354Ssam if (qlen != 0) { 2225178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 2226178354Ssam "recv ps-poll, send packet, %u still queued", qlen); 2227178354Ssam m->m_flags |= M_MORE_DATA; 2228178354Ssam } else { 2229178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 2230178354Ssam "%s", "recv ps-poll, send packet, queue empty"); 2231178354Ssam if (vap->iv_set_tim != NULL) 2232178354Ssam vap->iv_set_tim(ni, 0); 2233178354Ssam } 2234178354Ssam m->m_flags |= M_PWR_SAV; /* bypass PS handling */ 2235184288Ssam 2236184288Ssam if (m->m_flags & M_ENCAP) 2237184288Ssam ifp = vap->iv_ic->ic_ifp; 2238184288Ssam else 2239184288Ssam ifp = vap->iv_ifp; 2240178354Ssam IF_ENQUEUE(&ifp->if_snd, m); 2241178354Ssam if_start(ifp); 2242178354Ssam} 2243