ieee80211_hostap.c revision 186302
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 186302 2008-12-18 23:00:09Z 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> 60178354Ssam#include <net80211/ieee80211_wds.h> 61178354Ssam 62178354Ssam#define IEEE80211_RATE2MBS(r) (((r) & IEEE80211_RATE_VAL) / 2) 63178354Ssam 64178354Ssamstatic void hostap_vattach(struct ieee80211vap *); 65178354Ssamstatic int hostap_newstate(struct ieee80211vap *, enum ieee80211_state, int); 66178354Ssamstatic int hostap_input(struct ieee80211_node *ni, struct mbuf *m, 67178354Ssam int rssi, int noise, uint32_t rstamp); 68178354Ssamstatic void hostap_deliver_data(struct ieee80211vap *, 69178354Ssam struct ieee80211_node *, struct mbuf *); 70178354Ssamstatic void hostap_recv_mgmt(struct ieee80211_node *, struct mbuf *, 71178354Ssam int subtype, int rssi, int noise, uint32_t rstamp); 72178354Ssamstatic void hostap_recv_pspoll(struct ieee80211_node *, struct mbuf *); 73178354Ssam 74178354Ssamvoid 75178354Ssamieee80211_hostap_attach(struct ieee80211com *ic) 76178354Ssam{ 77178354Ssam ic->ic_vattach[IEEE80211_M_HOSTAP] = hostap_vattach; 78178354Ssam} 79178354Ssam 80178354Ssamvoid 81178354Ssamieee80211_hostap_detach(struct ieee80211com *ic) 82178354Ssam{ 83178354Ssam} 84178354Ssam 85178354Ssamstatic void 86178354Ssamhostap_vdetach(struct ieee80211vap *vap) 87178354Ssam{ 88178354Ssam} 89178354Ssam 90178354Ssamstatic void 91178354Ssamhostap_vattach(struct ieee80211vap *vap) 92178354Ssam{ 93178354Ssam vap->iv_newstate = hostap_newstate; 94178354Ssam vap->iv_input = hostap_input; 95178354Ssam vap->iv_recv_mgmt = hostap_recv_mgmt; 96178354Ssam vap->iv_opdetach = hostap_vdetach; 97178354Ssam vap->iv_deliver_data = hostap_deliver_data; 98178354Ssam} 99178354Ssam 100178354Ssamstatic void 101178354Ssamsta_disassoc(void *arg, struct ieee80211_node *ni) 102178354Ssam{ 103178354Ssam struct ieee80211vap *vap = arg; 104178354Ssam 105178354Ssam if (ni->ni_vap == vap && ni->ni_associd != 0) { 106178354Ssam IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DISASSOC, 107178354Ssam IEEE80211_REASON_ASSOC_LEAVE); 108178354Ssam ieee80211_node_leave(ni); 109178354Ssam } 110178354Ssam} 111178354Ssam 112178354Ssam/* 113178354Ssam * IEEE80211_M_HOSTAP vap state machine handler. 114178354Ssam */ 115178354Ssamstatic int 116178354Ssamhostap_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 117178354Ssam{ 118178354Ssam struct ieee80211com *ic = vap->iv_ic; 119178354Ssam enum ieee80211_state ostate; 120178354Ssam 121178354Ssam IEEE80211_LOCK_ASSERT(ic); 122178354Ssam 123178354Ssam ostate = vap->iv_state; 124178354Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", 125178354Ssam __func__, ieee80211_state_name[ostate], 126178354Ssam ieee80211_state_name[nstate], arg); 127178354Ssam vap->iv_state = nstate; /* state transition */ 128178354Ssam if (ostate != IEEE80211_S_SCAN) 129178354Ssam ieee80211_cancel_scan(vap); /* background scan */ 130178354Ssam switch (nstate) { 131178354Ssam case IEEE80211_S_INIT: 132178354Ssam switch (ostate) { 133178354Ssam case IEEE80211_S_SCAN: 134178354Ssam ieee80211_cancel_scan(vap); 135178354Ssam break; 136178354Ssam case IEEE80211_S_CAC: 137178354Ssam ieee80211_dfs_cac_stop(vap); 138178354Ssam break; 139178354Ssam case IEEE80211_S_RUN: 140178354Ssam ieee80211_iterate_nodes(&ic->ic_sta, sta_disassoc, vap); 141178354Ssam break; 142178354Ssam default: 143178354Ssam break; 144178354Ssam } 145178354Ssam if (ostate != IEEE80211_S_INIT) { 146178354Ssam /* NB: optimize INIT -> INIT case */ 147178354Ssam ieee80211_reset_bss(vap); 148178354Ssam } 149178354Ssam if (vap->iv_auth->ia_detach != NULL) 150178354Ssam vap->iv_auth->ia_detach(vap); 151178354Ssam break; 152178354Ssam case IEEE80211_S_SCAN: 153178354Ssam switch (ostate) { 154178354Ssam case IEEE80211_S_CSA: 155178354Ssam case IEEE80211_S_RUN: 156178354Ssam ieee80211_iterate_nodes(&ic->ic_sta, sta_disassoc, vap); 157178354Ssam /* 158178354Ssam * Clear overlapping BSS state; the beacon frame 159178354Ssam * will be reconstructed on transition to the RUN 160178354Ssam * state and the timeout routines check if the flag 161178354Ssam * is set before doing anything so this is sufficient. 162178354Ssam */ 163178354Ssam ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; 164178354Ssam ic->ic_flags_ext &= ~IEEE80211_FEXT_NONHT_PR; 165178354Ssam /* fall thru... */ 166178354Ssam case IEEE80211_S_CAC: 167178354Ssam /* 168178354Ssam * NB: We may get here because of a manual channel 169178354Ssam * change in which case we need to stop CAC 170178354Ssam * XXX no need to stop if ostate RUN but it's ok 171178354Ssam */ 172178354Ssam ieee80211_dfs_cac_stop(vap); 173178354Ssam /* fall thru... */ 174178354Ssam case IEEE80211_S_INIT: 175178354Ssam if (vap->iv_des_chan != IEEE80211_CHAN_ANYC && 176178354Ssam !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan)) { 177178354Ssam /* 178178354Ssam * Already have a channel; bypass the 179178354Ssam * scan and startup immediately. 180178354Ssam * ieee80211_create_ibss will call back to 181178354Ssam * move us to RUN state. 182178354Ssam */ 183178354Ssam ieee80211_create_ibss(vap, vap->iv_des_chan); 184178354Ssam break; 185178354Ssam } 186178354Ssam /* 187178354Ssam * Initiate a scan. We can come here as a result 188178354Ssam * of an IEEE80211_IOC_SCAN_REQ too in which case 189178354Ssam * the vap will be marked with IEEE80211_FEXT_SCANREQ 190178354Ssam * and the scan request parameters will be present 191178354Ssam * in iv_scanreq. Otherwise we do the default. 192178354Ssam */ 193178354Ssam if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { 194178354Ssam ieee80211_check_scan(vap, 195178354Ssam vap->iv_scanreq_flags, 196178354Ssam vap->iv_scanreq_duration, 197178354Ssam vap->iv_scanreq_mindwell, 198178354Ssam vap->iv_scanreq_maxdwell, 199178354Ssam vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); 200178354Ssam vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; 201178354Ssam } else 202178354Ssam ieee80211_check_scan_current(vap); 203178354Ssam break; 204178354Ssam case IEEE80211_S_SCAN: 205178354Ssam /* 206178354Ssam * A state change requires a reset; scan. 207178354Ssam */ 208178354Ssam ieee80211_check_scan_current(vap); 209178354Ssam break; 210178354Ssam default: 211178354Ssam break; 212178354Ssam } 213178354Ssam break; 214178354Ssam case IEEE80211_S_CAC: 215178354Ssam /* 216178354Ssam * Start CAC on a DFS channel. We come here when starting 217178354Ssam * a bss on a DFS channel (see ieee80211_create_ibss). 218178354Ssam */ 219178354Ssam ieee80211_dfs_cac_start(vap); 220178354Ssam break; 221178354Ssam case IEEE80211_S_RUN: 222178354Ssam if (vap->iv_flags & IEEE80211_F_WPA) { 223178354Ssam /* XXX validate prerequisites */ 224178354Ssam } 225178354Ssam switch (ostate) { 226178354Ssam case IEEE80211_S_INIT: 227178354Ssam /* 228178354Ssam * Already have a channel; bypass the 229178354Ssam * scan and startup immediately. 230178354Ssam * Note that ieee80211_create_ibss will call 231178354Ssam * back to do a RUN->RUN state change. 232178354Ssam */ 233178354Ssam ieee80211_create_ibss(vap, 234178354Ssam ieee80211_ht_adjust_channel(ic, 235178354Ssam ic->ic_curchan, vap->iv_flags_ext)); 236178354Ssam /* NB: iv_bss is changed on return */ 237178354Ssam break; 238178354Ssam case IEEE80211_S_CAC: 239178354Ssam /* 240178354Ssam * NB: This is the normal state change when CAC 241178354Ssam * expires and no radar was detected; no need to 242178354Ssam * clear the CAC timer as it's already expired. 243178354Ssam */ 244178354Ssam /* fall thru... */ 245178354Ssam case IEEE80211_S_CSA: 246178354Ssam /* 247178354Ssam * Update bss node channel to reflect where 248178354Ssam * we landed after CSA. 249178354Ssam */ 250178354Ssam ieee80211_node_set_chan(vap->iv_bss, 251178354Ssam ieee80211_ht_adjust_channel(ic, ic->ic_curchan, 252178354Ssam ieee80211_htchanflags(vap->iv_bss->ni_chan))); 253178354Ssam /* XXX bypass debug msgs */ 254178354Ssam break; 255178354Ssam case IEEE80211_S_SCAN: 256178354Ssam case IEEE80211_S_RUN: 257178354Ssam#ifdef IEEE80211_DEBUG 258178354Ssam if (ieee80211_msg_debug(vap)) { 259178354Ssam struct ieee80211_node *ni = vap->iv_bss; 260178354Ssam ieee80211_note(vap, 261178354Ssam "synchronized with %s ssid ", 262178354Ssam ether_sprintf(ni->ni_bssid)); 263178354Ssam ieee80211_print_essid(ni->ni_essid, 264178354Ssam ni->ni_esslen); 265178354Ssam /* XXX MCS/HT */ 266178354Ssam printf(" channel %d start %uMb\n", 267178354Ssam ieee80211_chan2ieee(ic, ic->ic_curchan), 268178354Ssam IEEE80211_RATE2MBS(ni->ni_txrate)); 269178354Ssam } 270178354Ssam#endif 271178354Ssam break; 272178354Ssam default: 273178354Ssam break; 274178354Ssam } 275178354Ssam /* 276178354Ssam * Start/stop the authenticator. We delay until here 277178354Ssam * to allow configuration to happen out of order. 278178354Ssam */ 279178354Ssam if (vap->iv_auth->ia_attach != NULL) { 280178354Ssam /* XXX check failure */ 281178354Ssam vap->iv_auth->ia_attach(vap); 282178354Ssam } else if (vap->iv_auth->ia_detach != NULL) { 283178354Ssam vap->iv_auth->ia_detach(vap); 284178354Ssam } 285178354Ssam ieee80211_node_authorize(vap->iv_bss); 286178354Ssam break; 287178354Ssam default: 288178354Ssam break; 289178354Ssam } 290178354Ssam return 0; 291178354Ssam} 292178354Ssam 293178354Ssamstatic void 294178354Ssamhostap_deliver_data(struct ieee80211vap *vap, 295178354Ssam struct ieee80211_node *ni, struct mbuf *m) 296178354Ssam{ 297178354Ssam struct ether_header *eh = mtod(m, struct ether_header *); 298178354Ssam struct ifnet *ifp = vap->iv_ifp; 299178354Ssam 300178354Ssam KASSERT(vap->iv_opmode == IEEE80211_M_HOSTAP, 301178354Ssam ("gack, opmode %d", vap->iv_opmode)); 302178354Ssam /* 303178354Ssam * Do accounting. 304178354Ssam */ 305178354Ssam ifp->if_ipackets++; 306178354Ssam IEEE80211_NODE_STAT(ni, rx_data); 307178354Ssam IEEE80211_NODE_STAT_ADD(ni, rx_bytes, m->m_pkthdr.len); 308178354Ssam if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 309178354Ssam m->m_flags |= M_MCAST; /* XXX M_BCAST? */ 310178354Ssam IEEE80211_NODE_STAT(ni, rx_mcast); 311178354Ssam } else 312178354Ssam IEEE80211_NODE_STAT(ni, rx_ucast); 313178354Ssam 314178354Ssam /* clear driver/net80211 flags before passing up */ 315178354Ssam m->m_flags &= ~M_80211_RX; 316178354Ssam 317178354Ssam /* perform as a bridge within the AP */ 318178354Ssam if ((vap->iv_flags & IEEE80211_F_NOBRIDGE) == 0) { 319178354Ssam struct mbuf *mcopy = NULL; 320178354Ssam 321178354Ssam if (m->m_flags & M_MCAST) { 322183364Ssam mcopy = m_dup(m, M_DONTWAIT); 323178354Ssam if (mcopy == NULL) 324178354Ssam ifp->if_oerrors++; 325178354Ssam else 326178354Ssam mcopy->m_flags |= M_MCAST; 327178354Ssam } else { 328178354Ssam /* 329178354Ssam * Check if the destination is associated with the 330178354Ssam * same vap and authorized to receive traffic. 331178354Ssam * Beware of traffic destined for the vap itself; 332178354Ssam * sending it will not work; just let it be delivered 333178354Ssam * normally. 334178354Ssam */ 335178354Ssam struct ieee80211_node *sta = ieee80211_find_vap_node( 336178354Ssam &vap->iv_ic->ic_sta, vap, eh->ether_dhost); 337178354Ssam if (sta != NULL) { 338178354Ssam if (ieee80211_node_is_authorized(sta)) { 339178354Ssam /* 340178354Ssam * Beware of sending to ourself; this 341178354Ssam * needs to happen via the normal 342178354Ssam * input path. 343178354Ssam */ 344178354Ssam if (sta != vap->iv_bss) { 345178354Ssam mcopy = m; 346178354Ssam m = NULL; 347178354Ssam } 348178354Ssam } else { 349178354Ssam vap->iv_stats.is_rx_unauth++; 350178354Ssam IEEE80211_NODE_STAT(sta, rx_unauth); 351178354Ssam } 352178354Ssam ieee80211_free_node(sta); 353178354Ssam } 354178354Ssam } 355178354Ssam if (mcopy != NULL) { 356178354Ssam int len, err; 357178354Ssam len = mcopy->m_pkthdr.len; 358185164Skmacy err = (ifp->if_transmit)(ifp, mcopy); 359178354Ssam if (err) { 360178354Ssam /* NB: IFQ_HANDOFF reclaims mcopy */ 361178354Ssam } else { 362178354Ssam ifp->if_opackets++; 363178354Ssam } 364178354Ssam } 365178354Ssam } 366178354Ssam if (m != NULL) { 367178354Ssam /* 368178354Ssam * Mark frame as coming from vap's interface. 369178354Ssam */ 370178354Ssam m->m_pkthdr.rcvif = ifp; 371178354Ssam if (m->m_flags & M_MCAST) { 372178354Ssam /* 373178354Ssam * Spam DWDS vap's w/ multicast traffic. 374178354Ssam */ 375178354Ssam /* XXX only if dwds in use? */ 376178354Ssam ieee80211_dwds_mcast(vap, m); 377178354Ssam } 378178354Ssam if (ni->ni_vlan != 0) { 379178354Ssam /* attach vlan tag */ 380178354Ssam m->m_pkthdr.ether_vtag = ni->ni_vlan; 381178354Ssam m->m_flags |= M_VLANTAG; 382178354Ssam } 383178354Ssam ifp->if_input(ifp, m); 384178354Ssam } 385178354Ssam} 386178354Ssam 387178354Ssam/* 388178354Ssam * Decide if a received management frame should be 389178354Ssam * printed when debugging is enabled. This filters some 390178354Ssam * of the less interesting frames that come frequently 391178354Ssam * (e.g. beacons). 392178354Ssam */ 393178354Ssamstatic __inline int 394178354Ssamdoprint(struct ieee80211vap *vap, int subtype) 395178354Ssam{ 396178354Ssam switch (subtype) { 397178354Ssam case IEEE80211_FC0_SUBTYPE_BEACON: 398178354Ssam return (vap->iv_ic->ic_flags & IEEE80211_F_SCAN); 399178354Ssam case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 400178354Ssam return 0; 401178354Ssam } 402178354Ssam return 1; 403178354Ssam} 404178354Ssam 405178354Ssam/* 406178354Ssam * Process a received frame. The node associated with the sender 407178354Ssam * should be supplied. If nothing was found in the node table then 408178354Ssam * the caller is assumed to supply a reference to iv_bss instead. 409178354Ssam * The RSSI and a timestamp are also supplied. The RSSI data is used 410178354Ssam * during AP scanning to select a AP to associate with; it can have 411178354Ssam * any units so long as values have consistent units and higher values 412178354Ssam * mean ``better signal''. The receive timestamp is currently not used 413178354Ssam * by the 802.11 layer. 414178354Ssam */ 415178354Ssamstatic int 416178354Ssamhostap_input(struct ieee80211_node *ni, struct mbuf *m, 417178354Ssam int rssi, int noise, uint32_t rstamp) 418178354Ssam{ 419178354Ssam#define SEQ_LEQ(a,b) ((int)((a)-(b)) <= 0) 420178354Ssam#define HAS_SEQ(type) ((type & 0x4) == 0) 421178354Ssam struct ieee80211vap *vap = ni->ni_vap; 422178354Ssam struct ieee80211com *ic = ni->ni_ic; 423178354Ssam struct ifnet *ifp = vap->iv_ifp; 424178354Ssam struct ieee80211_frame *wh; 425178354Ssam struct ieee80211_key *key; 426178354Ssam struct ether_header *eh; 427178354Ssam int hdrspace, need_tap; 428178354Ssam uint8_t dir, type, subtype, qos; 429178354Ssam uint8_t *bssid; 430178354Ssam uint16_t rxseq; 431178354Ssam 432183247Ssam if (m->m_flags & M_AMPDU_MPDU) { 433178354Ssam /* 434178354Ssam * Fastpath for A-MPDU reorder q resubmission. Frames 435183247Ssam * w/ M_AMPDU_MPDU marked have already passed through 436183247Ssam * here but were received out of order and been held on 437183247Ssam * the reorder queue. When resubmitted they are marked 438183247Ssam * with the M_AMPDU_MPDU flag and we can bypass most of 439183247Ssam * the normal processing. 440178354Ssam */ 441178354Ssam wh = mtod(m, struct ieee80211_frame *); 442178354Ssam type = IEEE80211_FC0_TYPE_DATA; 443178354Ssam dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 444178354Ssam subtype = IEEE80211_FC0_SUBTYPE_QOS; 445178354Ssam hdrspace = ieee80211_hdrspace(ic, wh); /* XXX optimize? */ 446178354Ssam goto resubmit_ampdu; 447178354Ssam } 448178354Ssam 449178354Ssam KASSERT(ni != NULL, ("null node")); 450178354Ssam ni->ni_inact = ni->ni_inact_reload; 451178354Ssam 452178354Ssam need_tap = 1; /* mbuf need to be tapped. */ 453178354Ssam type = -1; /* undefined */ 454178354Ssam 455178354Ssam if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 456178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 457178354Ssam ni->ni_macaddr, NULL, 458178354Ssam "too short (1): len %u", m->m_pkthdr.len); 459178354Ssam vap->iv_stats.is_rx_tooshort++; 460178354Ssam goto out; 461178354Ssam } 462178354Ssam /* 463178354Ssam * Bit of a cheat here, we use a pointer for a 3-address 464178354Ssam * frame format but don't reference fields past outside 465178354Ssam * ieee80211_frame_min w/o first validating the data is 466178354Ssam * present. 467178354Ssam */ 468178354Ssam wh = mtod(m, struct ieee80211_frame *); 469178354Ssam 470178354Ssam if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 471178354Ssam IEEE80211_FC0_VERSION_0) { 472178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 473178354Ssam ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]); 474178354Ssam vap->iv_stats.is_rx_badversion++; 475178354Ssam goto err; 476178354Ssam } 477178354Ssam 478178354Ssam dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 479178354Ssam type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 480178354Ssam subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 481178354Ssam if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 482178354Ssam if (dir != IEEE80211_FC1_DIR_NODS) 483178354Ssam bssid = wh->i_addr1; 484178354Ssam else if (type == IEEE80211_FC0_TYPE_CTL) 485178354Ssam bssid = wh->i_addr1; 486178354Ssam else { 487178354Ssam if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 488178354Ssam IEEE80211_DISCARD_MAC(vap, 489178354Ssam IEEE80211_MSG_ANY, ni->ni_macaddr, 490178354Ssam NULL, "too short (2): len %u", 491178354Ssam m->m_pkthdr.len); 492178354Ssam vap->iv_stats.is_rx_tooshort++; 493178354Ssam goto out; 494178354Ssam } 495178354Ssam bssid = wh->i_addr3; 496178354Ssam } 497178354Ssam /* 498178354Ssam * Validate the bssid. 499178354Ssam */ 500178354Ssam if (!(type == IEEE80211_FC0_TYPE_MGT && 501178354Ssam subtype == IEEE80211_FC0_SUBTYPE_BEACON) && 502178354Ssam !IEEE80211_ADDR_EQ(bssid, vap->iv_bss->ni_bssid) && 503178354Ssam !IEEE80211_ADDR_EQ(bssid, ifp->if_broadcastaddr)) { 504178354Ssam /* not interested in */ 505178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 506178354Ssam bssid, NULL, "%s", "not to bss"); 507178354Ssam vap->iv_stats.is_rx_wrongbss++; 508178354Ssam goto out; 509178354Ssam } 510178354Ssam 511178354Ssam IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 512178354Ssam ni->ni_noise = noise; 513178354Ssam ni->ni_rstamp = rstamp; 514178354Ssam if (HAS_SEQ(type)) { 515178354Ssam uint8_t tid = ieee80211_gettid(wh); 516178354Ssam if (IEEE80211_QOS_HAS_SEQ(wh) && 517178354Ssam TID_TO_WME_AC(tid) >= WME_AC_VI) 518178354Ssam ic->ic_wme.wme_hipri_traffic++; 519178354Ssam rxseq = le16toh(*(uint16_t *)wh->i_seq); 520178354Ssam if ((ni->ni_flags & IEEE80211_NODE_HT) == 0 && 521178354Ssam (wh->i_fc[1] & IEEE80211_FC1_RETRY) && 522178354Ssam SEQ_LEQ(rxseq, ni->ni_rxseqs[tid])) { 523178354Ssam /* duplicate, discard */ 524178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 525178354Ssam bssid, "duplicate", 526178354Ssam "seqno <%u,%u> fragno <%u,%u> tid %u", 527178354Ssam rxseq >> IEEE80211_SEQ_SEQ_SHIFT, 528178354Ssam ni->ni_rxseqs[tid] >> 529178354Ssam IEEE80211_SEQ_SEQ_SHIFT, 530178354Ssam rxseq & IEEE80211_SEQ_FRAG_MASK, 531178354Ssam ni->ni_rxseqs[tid] & 532178354Ssam IEEE80211_SEQ_FRAG_MASK, 533178354Ssam tid); 534178354Ssam vap->iv_stats.is_rx_dup++; 535178354Ssam IEEE80211_NODE_STAT(ni, rx_dup); 536178354Ssam goto out; 537178354Ssam } 538178354Ssam ni->ni_rxseqs[tid] = rxseq; 539178354Ssam } 540178354Ssam } 541178354Ssam 542178354Ssam switch (type) { 543178354Ssam case IEEE80211_FC0_TYPE_DATA: 544178354Ssam hdrspace = ieee80211_hdrspace(ic, wh); 545178354Ssam if (m->m_len < hdrspace && 546178354Ssam (m = m_pullup(m, hdrspace)) == NULL) { 547178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 548178354Ssam ni->ni_macaddr, NULL, 549178354Ssam "data too short: expecting %u", hdrspace); 550178354Ssam vap->iv_stats.is_rx_tooshort++; 551178354Ssam goto out; /* XXX */ 552178354Ssam } 553178354Ssam if (!(dir == IEEE80211_FC1_DIR_TODS || 554178354Ssam (dir == IEEE80211_FC1_DIR_DSTODS && 555178354Ssam (vap->iv_flags & IEEE80211_F_DWDS)))) { 556178354Ssam if (dir != IEEE80211_FC1_DIR_DSTODS) { 557178354Ssam IEEE80211_DISCARD(vap, 558178354Ssam IEEE80211_MSG_INPUT, wh, "data", 559178354Ssam "incorrect dir 0x%x", dir); 560178354Ssam } else { 561178354Ssam IEEE80211_DISCARD(vap, 562178354Ssam IEEE80211_MSG_INPUT | 563178354Ssam IEEE80211_MSG_WDS, wh, 564178354Ssam "4-address data", 565178354Ssam "%s", "DWDS not enabled"); 566178354Ssam } 567178354Ssam vap->iv_stats.is_rx_wrongdir++; 568178354Ssam goto out; 569178354Ssam } 570178354Ssam /* check if source STA is associated */ 571178354Ssam if (ni == vap->iv_bss) { 572178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 573178354Ssam wh, "data", "%s", "unknown src"); 574178354Ssam ieee80211_send_error(ni, wh->i_addr2, 575178354Ssam IEEE80211_FC0_SUBTYPE_DEAUTH, 576178354Ssam IEEE80211_REASON_NOT_AUTHED); 577178354Ssam vap->iv_stats.is_rx_notassoc++; 578178354Ssam goto err; 579178354Ssam } 580178354Ssam if (ni->ni_associd == 0) { 581178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 582178354Ssam wh, "data", "%s", "unassoc src"); 583178354Ssam IEEE80211_SEND_MGMT(ni, 584178354Ssam IEEE80211_FC0_SUBTYPE_DISASSOC, 585178354Ssam IEEE80211_REASON_NOT_ASSOCED); 586178354Ssam vap->iv_stats.is_rx_notassoc++; 587178354Ssam goto err; 588178354Ssam } 589178354Ssam 590178354Ssam /* 591178354Ssam * Check for power save state change. 592178354Ssam * XXX out-of-order A-MPDU frames? 593178354Ssam */ 594178354Ssam if (((wh->i_fc[1] & IEEE80211_FC1_PWR_MGT) ^ 595178354Ssam (ni->ni_flags & IEEE80211_NODE_PWR_MGT))) 596178354Ssam ieee80211_node_pwrsave(ni, 597178354Ssam wh->i_fc[1] & IEEE80211_FC1_PWR_MGT); 598178354Ssam /* 599178354Ssam * For 4-address packets handle WDS discovery 600178354Ssam * notifications. Once a WDS link is setup frames 601178354Ssam * are just delivered to the WDS vap (see below). 602178354Ssam */ 603178354Ssam if (dir == IEEE80211_FC1_DIR_DSTODS && ni->ni_wdsvap == NULL) { 604178354Ssam if (!ieee80211_node_is_authorized(ni)) { 605178354Ssam IEEE80211_DISCARD(vap, 606178354Ssam IEEE80211_MSG_INPUT | 607178354Ssam IEEE80211_MSG_WDS, wh, 608178354Ssam "4-address data", 609178354Ssam "%s", "unauthorized port"); 610178354Ssam vap->iv_stats.is_rx_unauth++; 611178354Ssam IEEE80211_NODE_STAT(ni, rx_unauth); 612178354Ssam goto err; 613178354Ssam } 614178354Ssam ieee80211_dwds_discover(ni, m); 615178354Ssam return type; 616178354Ssam } 617178354Ssam 618178354Ssam /* 619183247Ssam * Handle A-MPDU re-ordering. If the frame is to be 620183247Ssam * processed directly then ieee80211_ampdu_reorder 621178354Ssam * will return 0; otherwise it has consumed the mbuf 622178354Ssam * and we should do nothing more with it. 623178354Ssam */ 624183247Ssam if ((m->m_flags & M_AMPDU) && 625178354Ssam ieee80211_ampdu_reorder(ni, m) != 0) { 626178354Ssam m = NULL; 627178354Ssam goto out; 628178354Ssam } 629178354Ssam resubmit_ampdu: 630178354Ssam 631178354Ssam /* 632178354Ssam * Handle privacy requirements. Note that we 633178354Ssam * must not be preempted from here until after 634178354Ssam * we (potentially) call ieee80211_crypto_demic; 635178354Ssam * otherwise we may violate assumptions in the 636178354Ssam * crypto cipher modules used to do delayed update 637178354Ssam * of replay sequence numbers. 638178354Ssam */ 639178354Ssam if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 640178354Ssam if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 641178354Ssam /* 642178354Ssam * Discard encrypted frames when privacy is off. 643178354Ssam */ 644178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 645178354Ssam wh, "WEP", "%s", "PRIVACY off"); 646178354Ssam vap->iv_stats.is_rx_noprivacy++; 647178354Ssam IEEE80211_NODE_STAT(ni, rx_noprivacy); 648178354Ssam goto out; 649178354Ssam } 650178354Ssam key = ieee80211_crypto_decap(ni, m, hdrspace); 651178354Ssam if (key == NULL) { 652178354Ssam /* NB: stats+msgs handled in crypto_decap */ 653178354Ssam IEEE80211_NODE_STAT(ni, rx_wepfail); 654178354Ssam goto out; 655178354Ssam } 656178354Ssam wh = mtod(m, struct ieee80211_frame *); 657178354Ssam wh->i_fc[1] &= ~IEEE80211_FC1_WEP; 658178354Ssam } else { 659178354Ssam /* XXX M_WEP and IEEE80211_F_PRIVACY */ 660178354Ssam key = NULL; 661178354Ssam } 662178354Ssam 663178354Ssam /* 664178354Ssam * Save QoS bits for use below--before we strip the header. 665178354Ssam */ 666178354Ssam if (subtype == IEEE80211_FC0_SUBTYPE_QOS) { 667178354Ssam qos = (dir == IEEE80211_FC1_DIR_DSTODS) ? 668178354Ssam ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] : 669178354Ssam ((struct ieee80211_qosframe *)wh)->i_qos[0]; 670178354Ssam } else 671178354Ssam qos = 0; 672178354Ssam 673178354Ssam /* 674178354Ssam * Next up, any fragmentation. 675178354Ssam */ 676178354Ssam if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 677178354Ssam m = ieee80211_defrag(ni, m, hdrspace); 678178354Ssam if (m == NULL) { 679178354Ssam /* Fragment dropped or frame not complete yet */ 680178354Ssam goto out; 681178354Ssam } 682178354Ssam } 683178354Ssam wh = NULL; /* no longer valid, catch any uses */ 684178354Ssam 685178354Ssam /* 686178354Ssam * Next strip any MSDU crypto bits. 687178354Ssam */ 688178354Ssam if (key != NULL && !ieee80211_crypto_demic(vap, key, m, 0)) { 689178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 690178354Ssam ni->ni_macaddr, "data", "%s", "demic error"); 691178354Ssam vap->iv_stats.is_rx_demicfail++; 692178354Ssam IEEE80211_NODE_STAT(ni, rx_demicfail); 693178354Ssam goto out; 694178354Ssam } 695178354Ssam /* copy to listener after decrypt */ 696178354Ssam if (bpf_peers_present(vap->iv_rawbpf)) 697178354Ssam bpf_mtap(vap->iv_rawbpf, m); 698178354Ssam need_tap = 0; 699178354Ssam /* 700178354Ssam * Finally, strip the 802.11 header. 701178354Ssam */ 702178354Ssam m = ieee80211_decap(vap, m, hdrspace); 703178354Ssam if (m == NULL) { 704178354Ssam /* XXX mask bit to check for both */ 705178354Ssam /* don't count Null data frames as errors */ 706178354Ssam if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 707178354Ssam subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 708178354Ssam goto out; 709178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 710178354Ssam ni->ni_macaddr, "data", "%s", "decap error"); 711178354Ssam vap->iv_stats.is_rx_decap++; 712178354Ssam IEEE80211_NODE_STAT(ni, rx_decap); 713178354Ssam goto err; 714178354Ssam } 715178354Ssam eh = mtod(m, struct ether_header *); 716178354Ssam if (!ieee80211_node_is_authorized(ni)) { 717178354Ssam /* 718178354Ssam * Deny any non-PAE frames received prior to 719178354Ssam * authorization. For open/shared-key 720178354Ssam * authentication the port is mark authorized 721178354Ssam * after authentication completes. For 802.1x 722178354Ssam * the port is not marked authorized by the 723178354Ssam * authenticator until the handshake has completed. 724178354Ssam */ 725178354Ssam if (eh->ether_type != htons(ETHERTYPE_PAE)) { 726178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 727178354Ssam eh->ether_shost, "data", 728178354Ssam "unauthorized port: ether type 0x%x len %u", 729178354Ssam eh->ether_type, m->m_pkthdr.len); 730178354Ssam vap->iv_stats.is_rx_unauth++; 731178354Ssam IEEE80211_NODE_STAT(ni, rx_unauth); 732178354Ssam goto err; 733178354Ssam } 734178354Ssam } else { 735178354Ssam /* 736178354Ssam * When denying unencrypted frames, discard 737178354Ssam * any non-PAE frames received without encryption. 738178354Ssam */ 739178354Ssam if ((vap->iv_flags & IEEE80211_F_DROPUNENC) && 740178354Ssam (key == NULL && (m->m_flags & M_WEP) == 0) && 741178354Ssam eh->ether_type != htons(ETHERTYPE_PAE)) { 742178354Ssam /* 743178354Ssam * Drop unencrypted frames. 744178354Ssam */ 745178354Ssam vap->iv_stats.is_rx_unencrypted++; 746178354Ssam IEEE80211_NODE_STAT(ni, rx_unencrypted); 747178354Ssam goto out; 748178354Ssam } 749178354Ssam } 750178354Ssam /* XXX require HT? */ 751178354Ssam if (qos & IEEE80211_QOS_AMSDU) { 752178354Ssam m = ieee80211_decap_amsdu(ni, m); 753178354Ssam if (m == NULL) 754178354Ssam return IEEE80211_FC0_TYPE_DATA; 755184480Ssam } else if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) && 756178354Ssam#define FF_LLC_SIZE (sizeof(struct ether_header) + sizeof(struct llc)) 757178354Ssam m->m_pkthdr.len >= 3*FF_LLC_SIZE) { 758178354Ssam struct llc *llc; 759178354Ssam 760178354Ssam /* 761178354Ssam * Check for fast-frame tunnel encapsulation. 762178354Ssam */ 763178354Ssam if (m->m_len < FF_LLC_SIZE && 764178354Ssam (m = m_pullup(m, FF_LLC_SIZE)) == NULL) { 765178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 766178354Ssam ni->ni_macaddr, "fast-frame", 767178354Ssam "%s", "m_pullup(llc) failed"); 768178354Ssam vap->iv_stats.is_rx_tooshort++; 769178354Ssam return IEEE80211_FC0_TYPE_DATA; 770178354Ssam } 771178354Ssam llc = (struct llc *)(mtod(m, uint8_t *) + 772178354Ssam sizeof(struct ether_header)); 773178354Ssam if (llc->llc_snap.ether_type == htons(ATH_FF_ETH_TYPE)) { 774178354Ssam m_adj(m, FF_LLC_SIZE); 775178354Ssam m = ieee80211_decap_fastframe(ni, m); 776178354Ssam if (m == NULL) 777178354Ssam return IEEE80211_FC0_TYPE_DATA; 778178354Ssam } 779178354Ssam } 780178354Ssam#undef FF_LLC_SIZE 781178354Ssam if (dir == IEEE80211_FC1_DIR_DSTODS && ni->ni_wdsvap != NULL) 782178354Ssam ieee80211_deliver_data(ni->ni_wdsvap, ni, m); 783178354Ssam else 784178354Ssam hostap_deliver_data(vap, ni, m); 785178354Ssam return IEEE80211_FC0_TYPE_DATA; 786178354Ssam 787178354Ssam case IEEE80211_FC0_TYPE_MGT: 788178354Ssam vap->iv_stats.is_rx_mgmt++; 789178354Ssam IEEE80211_NODE_STAT(ni, rx_mgmt); 790178354Ssam if (dir != IEEE80211_FC1_DIR_NODS) { 791178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 792178354Ssam wh, "mgt", "incorrect dir 0x%x", dir); 793178354Ssam vap->iv_stats.is_rx_wrongdir++; 794178354Ssam goto err; 795178354Ssam } 796178354Ssam if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 797178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 798178354Ssam ni->ni_macaddr, "mgt", "too short: len %u", 799178354Ssam m->m_pkthdr.len); 800178354Ssam vap->iv_stats.is_rx_tooshort++; 801178354Ssam goto out; 802178354Ssam } 803178354Ssam if (IEEE80211_IS_MULTICAST(wh->i_addr2)) { 804178354Ssam /* ensure return frames are unicast */ 805178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 806178354Ssam wh, NULL, "source is multicast: %s", 807178354Ssam ether_sprintf(wh->i_addr2)); 808178354Ssam vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */ 809178354Ssam goto out; 810178354Ssam } 811178354Ssam#ifdef IEEE80211_DEBUG 812178354Ssam if ((ieee80211_msg_debug(vap) && doprint(vap, subtype)) || 813178354Ssam ieee80211_msg_dumppkts(vap)) { 814178354Ssam if_printf(ifp, "received %s from %s rssi %d\n", 815178354Ssam ieee80211_mgt_subtype_name[subtype >> 816178354Ssam IEEE80211_FC0_SUBTYPE_SHIFT], 817178354Ssam ether_sprintf(wh->i_addr2), rssi); 818178354Ssam } 819178354Ssam#endif 820178354Ssam if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 821178354Ssam if (subtype != IEEE80211_FC0_SUBTYPE_AUTH) { 822178354Ssam /* 823178354Ssam * Only shared key auth frames with a challenge 824178354Ssam * should be encrypted, discard all others. 825178354Ssam */ 826178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 827178354Ssam wh, NULL, 828178354Ssam "%s", "WEP set but not permitted"); 829178354Ssam vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 830178354Ssam goto out; 831178354Ssam } 832178354Ssam if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 833178354Ssam /* 834178354Ssam * Discard encrypted frames when privacy is off. 835178354Ssam */ 836178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 837178354Ssam wh, NULL, "%s", "WEP set but PRIVACY off"); 838178354Ssam vap->iv_stats.is_rx_noprivacy++; 839178354Ssam goto out; 840178354Ssam } 841178354Ssam hdrspace = ieee80211_hdrspace(ic, wh); 842178354Ssam key = ieee80211_crypto_decap(ni, m, hdrspace); 843178354Ssam if (key == NULL) { 844178354Ssam /* NB: stats+msgs handled in crypto_decap */ 845178354Ssam goto out; 846178354Ssam } 847178354Ssam wh = mtod(m, struct ieee80211_frame *); 848178354Ssam wh->i_fc[1] &= ~IEEE80211_FC1_WEP; 849178354Ssam } 850178354Ssam if (bpf_peers_present(vap->iv_rawbpf)) 851178354Ssam bpf_mtap(vap->iv_rawbpf, m); 852178354Ssam vap->iv_recv_mgmt(ni, m, subtype, rssi, noise, rstamp); 853178354Ssam m_freem(m); 854178354Ssam return IEEE80211_FC0_TYPE_MGT; 855178354Ssam 856178354Ssam case IEEE80211_FC0_TYPE_CTL: 857178354Ssam vap->iv_stats.is_rx_ctl++; 858178354Ssam IEEE80211_NODE_STAT(ni, rx_ctrl); 859178354Ssam switch (subtype) { 860178354Ssam case IEEE80211_FC0_SUBTYPE_PS_POLL: 861178354Ssam hostap_recv_pspoll(ni, m); 862178354Ssam break; 863178354Ssam case IEEE80211_FC0_SUBTYPE_BAR: 864178354Ssam ieee80211_recv_bar(ni, m); 865178354Ssam break; 866178354Ssam } 867178354Ssam goto out; 868178354Ssam default: 869178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 870178354Ssam wh, "bad", "frame type 0x%x", type); 871178354Ssam /* should not come here */ 872178354Ssam break; 873178354Ssam } 874178354Ssamerr: 875178354Ssam ifp->if_ierrors++; 876178354Ssamout: 877178354Ssam if (m != NULL) { 878178354Ssam if (bpf_peers_present(vap->iv_rawbpf) && need_tap) 879178354Ssam bpf_mtap(vap->iv_rawbpf, m); 880178354Ssam m_freem(m); 881178354Ssam } 882178354Ssam return type; 883178354Ssam#undef SEQ_LEQ 884178354Ssam} 885178354Ssam 886178354Ssamstatic void 887178354Ssamhostap_auth_open(struct ieee80211_node *ni, struct ieee80211_frame *wh, 888178354Ssam int rssi, int noise, uint32_t rstamp, uint16_t seq, uint16_t status) 889178354Ssam{ 890178354Ssam struct ieee80211vap *vap = ni->ni_vap; 891178354Ssam 892178354Ssam KASSERT(vap->iv_state == IEEE80211_S_RUN, ("state %d", vap->iv_state)); 893178354Ssam 894178354Ssam if (ni->ni_authmode == IEEE80211_AUTH_SHARED) { 895178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 896178354Ssam ni->ni_macaddr, "open auth", 897178354Ssam "bad sta auth mode %u", ni->ni_authmode); 898178354Ssam vap->iv_stats.is_rx_bad_auth++; /* XXX */ 899178354Ssam /* 900178354Ssam * Clear any challenge text that may be there if 901178354Ssam * a previous shared key auth failed and then an 902178354Ssam * open auth is attempted. 903178354Ssam */ 904178354Ssam if (ni->ni_challenge != NULL) { 905186302Ssam free(ni->ni_challenge, M_80211_NODE); 906178354Ssam ni->ni_challenge = NULL; 907178354Ssam } 908178354Ssam /* XXX hack to workaround calling convention */ 909178354Ssam ieee80211_send_error(ni, wh->i_addr2, 910178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 911178354Ssam (seq + 1) | (IEEE80211_STATUS_ALG<<16)); 912178354Ssam return; 913178354Ssam } 914178354Ssam if (seq != IEEE80211_AUTH_OPEN_REQUEST) { 915178354Ssam vap->iv_stats.is_rx_bad_auth++; 916178354Ssam return; 917178354Ssam } 918178354Ssam /* always accept open authentication requests */ 919178354Ssam if (ni == vap->iv_bss) { 920178354Ssam ni = ieee80211_dup_bss(vap, wh->i_addr2); 921178354Ssam if (ni == NULL) 922178354Ssam return; 923178354Ssam } else if ((ni->ni_flags & IEEE80211_NODE_AREF) == 0) 924178354Ssam (void) ieee80211_ref_node(ni); 925178354Ssam /* 926178354Ssam * Mark the node as referenced to reflect that it's 927178354Ssam * reference count has been bumped to insure it remains 928178354Ssam * after the transaction completes. 929178354Ssam */ 930178354Ssam ni->ni_flags |= IEEE80211_NODE_AREF; 931186099Ssam /* 932186151Ssam * Mark the node as requiring a valid association id 933186099Ssam * before outbound traffic is permitted. 934186099Ssam */ 935186099Ssam ni->ni_flags |= IEEE80211_NODE_ASSOCID; 936178354Ssam 937178354Ssam if (vap->iv_acl != NULL && 938178354Ssam vap->iv_acl->iac_getpolicy(vap) == IEEE80211_MACCMD_POLICY_RADIUS) { 939178354Ssam /* 940178354Ssam * When the ACL policy is set to RADIUS we defer the 941178354Ssam * authorization to a user agent. Dispatch an event, 942178354Ssam * a subsequent MLME call will decide the fate of the 943178354Ssam * station. If the user agent is not present then the 944178354Ssam * node will be reclaimed due to inactivity. 945178354Ssam */ 946178354Ssam IEEE80211_NOTE_MAC(vap, 947178354Ssam IEEE80211_MSG_AUTH | IEEE80211_MSG_ACL, ni->ni_macaddr, 948178354Ssam "%s", "station authentication defered (radius acl)"); 949178354Ssam ieee80211_notify_node_auth(ni); 950178354Ssam } else { 951178354Ssam IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, seq + 1); 952178354Ssam IEEE80211_NOTE_MAC(vap, 953178354Ssam IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, ni->ni_macaddr, 954178354Ssam "%s", "station authenticated (open)"); 955178354Ssam /* 956178354Ssam * When 802.1x is not in use mark the port 957178354Ssam * authorized at this point so traffic can flow. 958178354Ssam */ 959178354Ssam if (ni->ni_authmode != IEEE80211_AUTH_8021X) 960178354Ssam ieee80211_node_authorize(ni); 961178354Ssam } 962178354Ssam} 963178354Ssam 964178354Ssamstatic void 965178354Ssamhostap_auth_shared(struct ieee80211_node *ni, struct ieee80211_frame *wh, 966178354Ssam uint8_t *frm, uint8_t *efrm, int rssi, int noise, uint32_t rstamp, 967178354Ssam uint16_t seq, uint16_t status) 968178354Ssam{ 969178354Ssam struct ieee80211vap *vap = ni->ni_vap; 970178354Ssam uint8_t *challenge; 971178354Ssam int allocbs, estatus; 972178354Ssam 973178354Ssam KASSERT(vap->iv_state == IEEE80211_S_RUN, ("state %d", vap->iv_state)); 974178354Ssam 975178354Ssam /* 976178354Ssam * NB: this can happen as we allow pre-shared key 977178354Ssam * authentication to be enabled w/o wep being turned 978178354Ssam * on so that configuration of these can be done 979178354Ssam * in any order. It may be better to enforce the 980178354Ssam * ordering in which case this check would just be 981178354Ssam * for sanity/consistency. 982178354Ssam */ 983178354Ssam if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 984178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 985178354Ssam ni->ni_macaddr, "shared key auth", 986178354Ssam "%s", " PRIVACY is disabled"); 987178354Ssam estatus = IEEE80211_STATUS_ALG; 988178354Ssam goto bad; 989178354Ssam } 990178354Ssam /* 991178354Ssam * Pre-shared key authentication is evil; accept 992178354Ssam * it only if explicitly configured (it is supported 993178354Ssam * mainly for compatibility with clients like Mac OS X). 994178354Ssam */ 995178354Ssam if (ni->ni_authmode != IEEE80211_AUTH_AUTO && 996178354Ssam ni->ni_authmode != IEEE80211_AUTH_SHARED) { 997178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 998178354Ssam ni->ni_macaddr, "shared key auth", 999178354Ssam "bad sta auth mode %u", ni->ni_authmode); 1000178354Ssam vap->iv_stats.is_rx_bad_auth++; /* XXX maybe a unique error? */ 1001178354Ssam estatus = IEEE80211_STATUS_ALG; 1002178354Ssam goto bad; 1003178354Ssam } 1004178354Ssam 1005178354Ssam challenge = NULL; 1006178354Ssam if (frm + 1 < efrm) { 1007178354Ssam if ((frm[1] + 2) > (efrm - frm)) { 1008178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1009178354Ssam ni->ni_macaddr, "shared key auth", 1010178354Ssam "ie %d/%d too long", 1011178354Ssam frm[0], (frm[1] + 2) - (efrm - frm)); 1012178354Ssam vap->iv_stats.is_rx_bad_auth++; 1013178354Ssam estatus = IEEE80211_STATUS_CHALLENGE; 1014178354Ssam goto bad; 1015178354Ssam } 1016178354Ssam if (*frm == IEEE80211_ELEMID_CHALLENGE) 1017178354Ssam challenge = frm; 1018178354Ssam frm += frm[1] + 2; 1019178354Ssam } 1020178354Ssam switch (seq) { 1021178354Ssam case IEEE80211_AUTH_SHARED_CHALLENGE: 1022178354Ssam case IEEE80211_AUTH_SHARED_RESPONSE: 1023178354Ssam if (challenge == NULL) { 1024178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1025178354Ssam ni->ni_macaddr, "shared key auth", 1026178354Ssam "%s", "no challenge"); 1027178354Ssam vap->iv_stats.is_rx_bad_auth++; 1028178354Ssam estatus = IEEE80211_STATUS_CHALLENGE; 1029178354Ssam goto bad; 1030178354Ssam } 1031178354Ssam if (challenge[1] != IEEE80211_CHALLENGE_LEN) { 1032178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1033178354Ssam ni->ni_macaddr, "shared key auth", 1034178354Ssam "bad challenge len %d", challenge[1]); 1035178354Ssam vap->iv_stats.is_rx_bad_auth++; 1036178354Ssam estatus = IEEE80211_STATUS_CHALLENGE; 1037178354Ssam goto bad; 1038178354Ssam } 1039178354Ssam default: 1040178354Ssam break; 1041178354Ssam } 1042178354Ssam switch (seq) { 1043178354Ssam case IEEE80211_AUTH_SHARED_REQUEST: 1044178354Ssam if (ni == vap->iv_bss) { 1045178354Ssam ni = ieee80211_dup_bss(vap, wh->i_addr2); 1046178354Ssam if (ni == NULL) { 1047178354Ssam /* NB: no way to return an error */ 1048178354Ssam return; 1049178354Ssam } 1050178354Ssam allocbs = 1; 1051178354Ssam } else { 1052178354Ssam if ((ni->ni_flags & IEEE80211_NODE_AREF) == 0) 1053178354Ssam (void) ieee80211_ref_node(ni); 1054178354Ssam allocbs = 0; 1055178354Ssam } 1056178354Ssam /* 1057178354Ssam * Mark the node as referenced to reflect that it's 1058178354Ssam * reference count has been bumped to insure it remains 1059178354Ssam * after the transaction completes. 1060178354Ssam */ 1061178354Ssam ni->ni_flags |= IEEE80211_NODE_AREF; 1062186099Ssam /* 1063186099Ssam * Mark the node as requiring a valid associatio id 1064186099Ssam * before outbound traffic is permitted. 1065186099Ssam */ 1066186099Ssam ni->ni_flags |= IEEE80211_NODE_ASSOCID; 1067178354Ssam IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 1068178354Ssam ni->ni_noise = noise; 1069178354Ssam ni->ni_rstamp = rstamp; 1070178354Ssam if (!ieee80211_alloc_challenge(ni)) { 1071178354Ssam /* NB: don't return error so they rexmit */ 1072178354Ssam return; 1073178354Ssam } 1074178354Ssam get_random_bytes(ni->ni_challenge, 1075178354Ssam IEEE80211_CHALLENGE_LEN); 1076178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, 1077178354Ssam ni, "shared key %sauth request", allocbs ? "" : "re"); 1078178354Ssam /* 1079178354Ssam * When the ACL policy is set to RADIUS we defer the 1080178354Ssam * authorization to a user agent. Dispatch an event, 1081178354Ssam * a subsequent MLME call will decide the fate of the 1082178354Ssam * station. If the user agent is not present then the 1083178354Ssam * node will be reclaimed due to inactivity. 1084178354Ssam */ 1085178354Ssam if (vap->iv_acl != NULL && 1086178354Ssam vap->iv_acl->iac_getpolicy(vap) == IEEE80211_MACCMD_POLICY_RADIUS) { 1087178354Ssam IEEE80211_NOTE_MAC(vap, 1088178354Ssam IEEE80211_MSG_AUTH | IEEE80211_MSG_ACL, 1089178354Ssam ni->ni_macaddr, 1090178354Ssam "%s", "station authentication defered (radius acl)"); 1091178354Ssam ieee80211_notify_node_auth(ni); 1092178354Ssam return; 1093178354Ssam } 1094178354Ssam break; 1095178354Ssam case IEEE80211_AUTH_SHARED_RESPONSE: 1096178354Ssam if (ni == vap->iv_bss) { 1097178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1098178354Ssam ni->ni_macaddr, "shared key response", 1099178354Ssam "%s", "unknown station"); 1100178354Ssam /* NB: don't send a response */ 1101178354Ssam return; 1102178354Ssam } 1103178354Ssam if (ni->ni_challenge == NULL) { 1104178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1105178354Ssam ni->ni_macaddr, "shared key response", 1106178354Ssam "%s", "no challenge recorded"); 1107178354Ssam vap->iv_stats.is_rx_bad_auth++; 1108178354Ssam estatus = IEEE80211_STATUS_CHALLENGE; 1109178354Ssam goto bad; 1110178354Ssam } 1111178354Ssam if (memcmp(ni->ni_challenge, &challenge[2], 1112178354Ssam challenge[1]) != 0) { 1113178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1114178354Ssam ni->ni_macaddr, "shared key response", 1115178354Ssam "%s", "challenge mismatch"); 1116178354Ssam vap->iv_stats.is_rx_auth_fail++; 1117178354Ssam estatus = IEEE80211_STATUS_CHALLENGE; 1118178354Ssam goto bad; 1119178354Ssam } 1120178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, 1121178354Ssam ni, "%s", "station authenticated (shared key)"); 1122178354Ssam ieee80211_node_authorize(ni); 1123178354Ssam break; 1124178354Ssam default: 1125178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1126178354Ssam ni->ni_macaddr, "shared key auth", 1127178354Ssam "bad seq %d", seq); 1128178354Ssam vap->iv_stats.is_rx_bad_auth++; 1129178354Ssam estatus = IEEE80211_STATUS_SEQUENCE; 1130178354Ssam goto bad; 1131178354Ssam } 1132178354Ssam IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, seq + 1); 1133178354Ssam return; 1134178354Ssambad: 1135178354Ssam /* 1136178354Ssam * Send an error response; but only when operating as an AP. 1137178354Ssam */ 1138178354Ssam /* XXX hack to workaround calling convention */ 1139178354Ssam ieee80211_send_error(ni, wh->i_addr2, 1140178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 1141178354Ssam (seq + 1) | (estatus<<16)); 1142178354Ssam} 1143178354Ssam 1144178354Ssam/* 1145178354Ssam * Convert a WPA cipher selector OUI to an internal 1146178354Ssam * cipher algorithm. Where appropriate we also 1147178354Ssam * record any key length. 1148178354Ssam */ 1149178354Ssamstatic int 1150178354Ssamwpa_cipher(const uint8_t *sel, uint8_t *keylen) 1151178354Ssam{ 1152178354Ssam#define WPA_SEL(x) (((x)<<24)|WPA_OUI) 1153178354Ssam uint32_t w = LE_READ_4(sel); 1154178354Ssam 1155178354Ssam switch (w) { 1156178354Ssam case WPA_SEL(WPA_CSE_NULL): 1157178354Ssam return IEEE80211_CIPHER_NONE; 1158178354Ssam case WPA_SEL(WPA_CSE_WEP40): 1159178354Ssam if (keylen) 1160178354Ssam *keylen = 40 / NBBY; 1161178354Ssam return IEEE80211_CIPHER_WEP; 1162178354Ssam case WPA_SEL(WPA_CSE_WEP104): 1163178354Ssam if (keylen) 1164178354Ssam *keylen = 104 / NBBY; 1165178354Ssam return IEEE80211_CIPHER_WEP; 1166178354Ssam case WPA_SEL(WPA_CSE_TKIP): 1167178354Ssam return IEEE80211_CIPHER_TKIP; 1168178354Ssam case WPA_SEL(WPA_CSE_CCMP): 1169178354Ssam return IEEE80211_CIPHER_AES_CCM; 1170178354Ssam } 1171178354Ssam return 32; /* NB: so 1<< is discarded */ 1172178354Ssam#undef WPA_SEL 1173178354Ssam} 1174178354Ssam 1175178354Ssam/* 1176178354Ssam * Convert a WPA key management/authentication algorithm 1177178354Ssam * to an internal code. 1178178354Ssam */ 1179178354Ssamstatic int 1180178354Ssamwpa_keymgmt(const uint8_t *sel) 1181178354Ssam{ 1182178354Ssam#define WPA_SEL(x) (((x)<<24)|WPA_OUI) 1183178354Ssam uint32_t w = LE_READ_4(sel); 1184178354Ssam 1185178354Ssam switch (w) { 1186178354Ssam case WPA_SEL(WPA_ASE_8021X_UNSPEC): 1187178354Ssam return WPA_ASE_8021X_UNSPEC; 1188178354Ssam case WPA_SEL(WPA_ASE_8021X_PSK): 1189178354Ssam return WPA_ASE_8021X_PSK; 1190178354Ssam case WPA_SEL(WPA_ASE_NONE): 1191178354Ssam return WPA_ASE_NONE; 1192178354Ssam } 1193178354Ssam return 0; /* NB: so is discarded */ 1194178354Ssam#undef WPA_SEL 1195178354Ssam} 1196178354Ssam 1197178354Ssam/* 1198178354Ssam * Parse a WPA information element to collect parameters. 1199178354Ssam * Note that we do not validate security parameters; that 1200178354Ssam * is handled by the authenticator; the parsing done here 1201178354Ssam * is just for internal use in making operational decisions. 1202178354Ssam */ 1203178354Ssamstatic int 1204178354Ssamieee80211_parse_wpa(struct ieee80211vap *vap, const uint8_t *frm, 1205178354Ssam struct ieee80211_rsnparms *rsn, const struct ieee80211_frame *wh) 1206178354Ssam{ 1207178354Ssam uint8_t len = frm[1]; 1208178354Ssam uint32_t w; 1209178354Ssam int n; 1210178354Ssam 1211178354Ssam /* 1212178354Ssam * Check the length once for fixed parts: OUI, type, 1213178354Ssam * version, mcast cipher, and 2 selector counts. 1214178354Ssam * Other, variable-length data, must be checked separately. 1215178354Ssam */ 1216178354Ssam if ((vap->iv_flags & IEEE80211_F_WPA1) == 0) { 1217178354Ssam IEEE80211_DISCARD_IE(vap, 1218178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1219178354Ssam wh, "WPA", "not WPA, flags 0x%x", vap->iv_flags); 1220178354Ssam return IEEE80211_REASON_IE_INVALID; 1221178354Ssam } 1222178354Ssam if (len < 14) { 1223178354Ssam IEEE80211_DISCARD_IE(vap, 1224178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1225178354Ssam wh, "WPA", "too short, len %u", len); 1226178354Ssam return IEEE80211_REASON_IE_INVALID; 1227178354Ssam } 1228178354Ssam frm += 6, len -= 4; /* NB: len is payload only */ 1229178354Ssam /* NB: iswapoui already validated the OUI and type */ 1230178354Ssam w = LE_READ_2(frm); 1231178354Ssam if (w != WPA_VERSION) { 1232178354Ssam IEEE80211_DISCARD_IE(vap, 1233178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1234178354Ssam wh, "WPA", "bad version %u", w); 1235178354Ssam return IEEE80211_REASON_IE_INVALID; 1236178354Ssam } 1237178354Ssam frm += 2, len -= 2; 1238178354Ssam 1239178354Ssam memset(rsn, 0, sizeof(*rsn)); 1240178354Ssam 1241178354Ssam /* multicast/group cipher */ 1242178354Ssam rsn->rsn_mcastcipher = wpa_cipher(frm, &rsn->rsn_mcastkeylen); 1243178354Ssam frm += 4, len -= 4; 1244178354Ssam 1245178354Ssam /* unicast ciphers */ 1246178354Ssam n = LE_READ_2(frm); 1247178354Ssam frm += 2, len -= 2; 1248178354Ssam if (len < n*4+2) { 1249178354Ssam IEEE80211_DISCARD_IE(vap, 1250178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1251178354Ssam wh, "WPA", "ucast cipher data too short; len %u, n %u", 1252178354Ssam len, n); 1253178354Ssam return IEEE80211_REASON_IE_INVALID; 1254178354Ssam } 1255178354Ssam w = 0; 1256178354Ssam for (; n > 0; n--) { 1257178354Ssam w |= 1<<wpa_cipher(frm, &rsn->rsn_ucastkeylen); 1258178354Ssam frm += 4, len -= 4; 1259178354Ssam } 1260178354Ssam if (w & (1<<IEEE80211_CIPHER_TKIP)) 1261178354Ssam rsn->rsn_ucastcipher = IEEE80211_CIPHER_TKIP; 1262178354Ssam else 1263178354Ssam rsn->rsn_ucastcipher = IEEE80211_CIPHER_AES_CCM; 1264178354Ssam 1265178354Ssam /* key management algorithms */ 1266178354Ssam n = LE_READ_2(frm); 1267178354Ssam frm += 2, len -= 2; 1268178354Ssam if (len < n*4) { 1269178354Ssam IEEE80211_DISCARD_IE(vap, 1270178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1271178354Ssam wh, "WPA", "key mgmt alg data too short; len %u, n %u", 1272178354Ssam len, n); 1273178354Ssam return IEEE80211_REASON_IE_INVALID; 1274178354Ssam } 1275178354Ssam w = 0; 1276178354Ssam for (; n > 0; n--) { 1277178354Ssam w |= wpa_keymgmt(frm); 1278178354Ssam frm += 4, len -= 4; 1279178354Ssam } 1280178354Ssam if (w & WPA_ASE_8021X_UNSPEC) 1281178354Ssam rsn->rsn_keymgmt = WPA_ASE_8021X_UNSPEC; 1282178354Ssam else 1283178354Ssam rsn->rsn_keymgmt = WPA_ASE_8021X_PSK; 1284178354Ssam 1285178354Ssam if (len > 2) /* optional capabilities */ 1286178354Ssam rsn->rsn_caps = LE_READ_2(frm); 1287178354Ssam 1288178354Ssam return 0; 1289178354Ssam} 1290178354Ssam 1291178354Ssam/* 1292178354Ssam * Convert an RSN cipher selector OUI to an internal 1293178354Ssam * cipher algorithm. Where appropriate we also 1294178354Ssam * record any key length. 1295178354Ssam */ 1296178354Ssamstatic int 1297178354Ssamrsn_cipher(const uint8_t *sel, uint8_t *keylen) 1298178354Ssam{ 1299178354Ssam#define RSN_SEL(x) (((x)<<24)|RSN_OUI) 1300178354Ssam uint32_t w = LE_READ_4(sel); 1301178354Ssam 1302178354Ssam switch (w) { 1303178354Ssam case RSN_SEL(RSN_CSE_NULL): 1304178354Ssam return IEEE80211_CIPHER_NONE; 1305178354Ssam case RSN_SEL(RSN_CSE_WEP40): 1306178354Ssam if (keylen) 1307178354Ssam *keylen = 40 / NBBY; 1308178354Ssam return IEEE80211_CIPHER_WEP; 1309178354Ssam case RSN_SEL(RSN_CSE_WEP104): 1310178354Ssam if (keylen) 1311178354Ssam *keylen = 104 / NBBY; 1312178354Ssam return IEEE80211_CIPHER_WEP; 1313178354Ssam case RSN_SEL(RSN_CSE_TKIP): 1314178354Ssam return IEEE80211_CIPHER_TKIP; 1315178354Ssam case RSN_SEL(RSN_CSE_CCMP): 1316178354Ssam return IEEE80211_CIPHER_AES_CCM; 1317178354Ssam case RSN_SEL(RSN_CSE_WRAP): 1318178354Ssam return IEEE80211_CIPHER_AES_OCB; 1319178354Ssam } 1320178354Ssam return 32; /* NB: so 1<< is discarded */ 1321178354Ssam#undef WPA_SEL 1322178354Ssam} 1323178354Ssam 1324178354Ssam/* 1325178354Ssam * Convert an RSN key management/authentication algorithm 1326178354Ssam * to an internal code. 1327178354Ssam */ 1328178354Ssamstatic int 1329178354Ssamrsn_keymgmt(const uint8_t *sel) 1330178354Ssam{ 1331178354Ssam#define RSN_SEL(x) (((x)<<24)|RSN_OUI) 1332178354Ssam uint32_t w = LE_READ_4(sel); 1333178354Ssam 1334178354Ssam switch (w) { 1335178354Ssam case RSN_SEL(RSN_ASE_8021X_UNSPEC): 1336178354Ssam return RSN_ASE_8021X_UNSPEC; 1337178354Ssam case RSN_SEL(RSN_ASE_8021X_PSK): 1338178354Ssam return RSN_ASE_8021X_PSK; 1339178354Ssam case RSN_SEL(RSN_ASE_NONE): 1340178354Ssam return RSN_ASE_NONE; 1341178354Ssam } 1342178354Ssam return 0; /* NB: so is discarded */ 1343178354Ssam#undef RSN_SEL 1344178354Ssam} 1345178354Ssam 1346178354Ssam/* 1347178354Ssam * Parse a WPA/RSN information element to collect parameters 1348178354Ssam * and validate the parameters against what has been 1349178354Ssam * configured for the system. 1350178354Ssam */ 1351178354Ssamstatic int 1352178354Ssamieee80211_parse_rsn(struct ieee80211vap *vap, const uint8_t *frm, 1353178354Ssam struct ieee80211_rsnparms *rsn, const struct ieee80211_frame *wh) 1354178354Ssam{ 1355178354Ssam uint8_t len = frm[1]; 1356178354Ssam uint32_t w; 1357178354Ssam int n; 1358178354Ssam 1359178354Ssam /* 1360178354Ssam * Check the length once for fixed parts: 1361178354Ssam * version, mcast cipher, and 2 selector counts. 1362178354Ssam * Other, variable-length data, must be checked separately. 1363178354Ssam */ 1364178354Ssam if ((vap->iv_flags & IEEE80211_F_WPA2) == 0) { 1365178354Ssam IEEE80211_DISCARD_IE(vap, 1366178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1367178354Ssam wh, "WPA", "not RSN, flags 0x%x", vap->iv_flags); 1368178354Ssam return IEEE80211_REASON_IE_INVALID; 1369178354Ssam } 1370178354Ssam if (len < 10) { 1371178354Ssam IEEE80211_DISCARD_IE(vap, 1372178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1373178354Ssam wh, "RSN", "too short, len %u", len); 1374178354Ssam return IEEE80211_REASON_IE_INVALID; 1375178354Ssam } 1376178354Ssam frm += 2; 1377178354Ssam w = LE_READ_2(frm); 1378178354Ssam if (w != RSN_VERSION) { 1379178354Ssam IEEE80211_DISCARD_IE(vap, 1380178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1381178354Ssam wh, "RSN", "bad version %u", w); 1382178354Ssam return IEEE80211_REASON_IE_INVALID; 1383178354Ssam } 1384178354Ssam frm += 2, len -= 2; 1385178354Ssam 1386178354Ssam memset(rsn, 0, sizeof(*rsn)); 1387178354Ssam 1388178354Ssam /* multicast/group cipher */ 1389178354Ssam rsn->rsn_mcastcipher = rsn_cipher(frm, &rsn->rsn_mcastkeylen); 1390178354Ssam frm += 4, len -= 4; 1391178354Ssam 1392178354Ssam /* unicast ciphers */ 1393178354Ssam n = LE_READ_2(frm); 1394178354Ssam frm += 2, len -= 2; 1395178354Ssam if (len < n*4+2) { 1396178354Ssam IEEE80211_DISCARD_IE(vap, 1397178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1398178354Ssam wh, "RSN", "ucast cipher data too short; len %u, n %u", 1399178354Ssam len, n); 1400178354Ssam return IEEE80211_REASON_IE_INVALID; 1401178354Ssam } 1402178354Ssam w = 0; 1403178354Ssam for (; n > 0; n--) { 1404178354Ssam w |= 1<<rsn_cipher(frm, &rsn->rsn_ucastkeylen); 1405178354Ssam frm += 4, len -= 4; 1406178354Ssam } 1407178354Ssam if (w & (1<<IEEE80211_CIPHER_TKIP)) 1408178354Ssam rsn->rsn_ucastcipher = IEEE80211_CIPHER_TKIP; 1409178354Ssam else 1410178354Ssam rsn->rsn_ucastcipher = IEEE80211_CIPHER_AES_CCM; 1411178354Ssam 1412178354Ssam /* key management algorithms */ 1413178354Ssam n = LE_READ_2(frm); 1414178354Ssam frm += 2, len -= 2; 1415178354Ssam if (len < n*4) { 1416178354Ssam IEEE80211_DISCARD_IE(vap, 1417178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1418178354Ssam wh, "RSN", "key mgmt alg data too short; len %u, n %u", 1419178354Ssam len, n); 1420178354Ssam return IEEE80211_REASON_IE_INVALID; 1421178354Ssam } 1422178354Ssam w = 0; 1423178354Ssam for (; n > 0; n--) { 1424178354Ssam w |= rsn_keymgmt(frm); 1425178354Ssam frm += 4, len -= 4; 1426178354Ssam } 1427178354Ssam if (w & RSN_ASE_8021X_UNSPEC) 1428178354Ssam rsn->rsn_keymgmt = RSN_ASE_8021X_UNSPEC; 1429178354Ssam else 1430178354Ssam rsn->rsn_keymgmt = RSN_ASE_8021X_PSK; 1431178354Ssam 1432178354Ssam /* optional RSN capabilities */ 1433178354Ssam if (len > 2) 1434178354Ssam rsn->rsn_caps = LE_READ_2(frm); 1435178354Ssam /* XXXPMKID */ 1436178354Ssam 1437178354Ssam return 0; 1438178354Ssam} 1439178354Ssam 1440178354Ssam/* 1441178354Ssam * WPA/802.11i assocation request processing. 1442178354Ssam */ 1443178354Ssamstatic int 1444178354Ssamwpa_assocreq(struct ieee80211_node *ni, struct ieee80211_rsnparms *rsnparms, 1445178354Ssam const struct ieee80211_frame *wh, const uint8_t *wpa, 1446178354Ssam const uint8_t *rsn, uint16_t capinfo) 1447178354Ssam{ 1448178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1449178354Ssam uint8_t reason; 1450178354Ssam int badwparsn; 1451178354Ssam 1452178354Ssam ni->ni_flags &= ~(IEEE80211_NODE_WPS|IEEE80211_NODE_TSN); 1453178354Ssam if (wpa == NULL && rsn == NULL) { 1454178354Ssam if (vap->iv_flags_ext & IEEE80211_FEXT_WPS) { 1455178354Ssam /* 1456178354Ssam * W-Fi Protected Setup (WPS) permits 1457178354Ssam * clients to associate and pass EAPOL frames 1458178354Ssam * to establish initial credentials. 1459178354Ssam */ 1460178354Ssam ni->ni_flags |= IEEE80211_NODE_WPS; 1461178354Ssam return 1; 1462178354Ssam } 1463178354Ssam if ((vap->iv_flags_ext & IEEE80211_FEXT_TSN) && 1464178354Ssam (capinfo & IEEE80211_CAPINFO_PRIVACY)) { 1465178354Ssam /* 1466178354Ssam * Transitional Security Network. Permits clients 1467178354Ssam * to associate and use WEP while WPA is configured. 1468178354Ssam */ 1469178354Ssam ni->ni_flags |= IEEE80211_NODE_TSN; 1470178354Ssam return 1; 1471178354Ssam } 1472178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA, 1473178354Ssam wh, NULL, "%s", "no WPA/RSN IE in association request"); 1474178354Ssam vap->iv_stats.is_rx_assoc_badwpaie++; 1475178354Ssam reason = IEEE80211_REASON_IE_INVALID; 1476178354Ssam goto bad; 1477178354Ssam } 1478178354Ssam /* assert right association security credentials */ 1479178354Ssam badwparsn = 0; /* NB: to silence compiler */ 1480178354Ssam switch (vap->iv_flags & IEEE80211_F_WPA) { 1481178354Ssam case IEEE80211_F_WPA1: 1482178354Ssam badwparsn = (wpa == NULL); 1483178354Ssam break; 1484178354Ssam case IEEE80211_F_WPA2: 1485178354Ssam badwparsn = (rsn == NULL); 1486178354Ssam break; 1487178354Ssam case IEEE80211_F_WPA1|IEEE80211_F_WPA2: 1488178354Ssam badwparsn = (wpa == NULL && rsn == NULL); 1489178354Ssam break; 1490178354Ssam } 1491178354Ssam if (badwparsn) { 1492178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA, 1493178354Ssam wh, NULL, 1494178354Ssam "%s", "missing WPA/RSN IE in association request"); 1495178354Ssam vap->iv_stats.is_rx_assoc_badwpaie++; 1496178354Ssam reason = IEEE80211_REASON_IE_INVALID; 1497178354Ssam goto bad; 1498178354Ssam } 1499178354Ssam /* 1500178354Ssam * Parse WPA/RSN information element. 1501178354Ssam */ 1502178354Ssam if (wpa != NULL) 1503178354Ssam reason = ieee80211_parse_wpa(vap, wpa, rsnparms, wh); 1504178354Ssam else 1505178354Ssam reason = ieee80211_parse_rsn(vap, rsn, rsnparms, wh); 1506178354Ssam if (reason != 0) { 1507178354Ssam /* XXX distinguish WPA/RSN? */ 1508178354Ssam vap->iv_stats.is_rx_assoc_badwpaie++; 1509178354Ssam goto bad; 1510178354Ssam } 1511178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA, ni, 1512178354Ssam "%s ie: mc %u/%u uc %u/%u key %u caps 0x%x", 1513178354Ssam wpa != NULL ? "WPA" : "RSN", 1514178354Ssam rsnparms->rsn_mcastcipher, rsnparms->rsn_mcastkeylen, 1515178354Ssam rsnparms->rsn_ucastcipher, rsnparms->rsn_ucastkeylen, 1516178354Ssam rsnparms->rsn_keymgmt, rsnparms->rsn_caps); 1517178354Ssam 1518178354Ssam return 1; 1519178354Ssambad: 1520178354Ssam ieee80211_node_deauth(ni, reason); 1521178354Ssam return 0; 1522178354Ssam} 1523178354Ssam 1524178354Ssam/* XXX find a better place for definition */ 1525178354Ssamstruct l2_update_frame { 1526178354Ssam struct ether_header eh; 1527178354Ssam uint8_t dsap; 1528178354Ssam uint8_t ssap; 1529178354Ssam uint8_t control; 1530178354Ssam uint8_t xid[3]; 1531178354Ssam} __packed; 1532178354Ssam 1533178354Ssam/* 1534178354Ssam * Deliver a TGf L2UF frame on behalf of a station. 1535178354Ssam * This primes any bridge when the station is roaming 1536178354Ssam * between ap's on the same wired network. 1537178354Ssam */ 1538178354Ssamstatic void 1539178354Ssamieee80211_deliver_l2uf(struct ieee80211_node *ni) 1540178354Ssam{ 1541178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1542178354Ssam struct ifnet *ifp = vap->iv_ifp; 1543178354Ssam struct mbuf *m; 1544178354Ssam struct l2_update_frame *l2uf; 1545178354Ssam struct ether_header *eh; 1546178354Ssam 1547178354Ssam m = m_gethdr(M_NOWAIT, MT_DATA); 1548178354Ssam if (m == NULL) { 1549178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 1550178354Ssam "%s", "no mbuf for l2uf frame"); 1551178354Ssam vap->iv_stats.is_rx_nobuf++; /* XXX not right */ 1552178354Ssam return; 1553178354Ssam } 1554178354Ssam l2uf = mtod(m, struct l2_update_frame *); 1555178354Ssam eh = &l2uf->eh; 1556178354Ssam /* dst: Broadcast address */ 1557178354Ssam IEEE80211_ADDR_COPY(eh->ether_dhost, ifp->if_broadcastaddr); 1558178354Ssam /* src: associated STA */ 1559178354Ssam IEEE80211_ADDR_COPY(eh->ether_shost, ni->ni_macaddr); 1560178354Ssam eh->ether_type = htons(sizeof(*l2uf) - sizeof(*eh)); 1561178354Ssam 1562178354Ssam l2uf->dsap = 0; 1563178354Ssam l2uf->ssap = 0; 1564178354Ssam l2uf->control = 0xf5; 1565178354Ssam l2uf->xid[0] = 0x81; 1566178354Ssam l2uf->xid[1] = 0x80; 1567178354Ssam l2uf->xid[2] = 0x00; 1568178354Ssam 1569178354Ssam m->m_pkthdr.len = m->m_len = sizeof(*l2uf); 1570178354Ssam hostap_deliver_data(vap, ni, m); 1571178354Ssam} 1572178354Ssam 1573178354Ssamstatic void 1574178354Ssamratesetmismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh, 1575178354Ssam int reassoc, int resp, const char *tag, int rate) 1576178354Ssam{ 1577178354Ssam IEEE80211_NOTE_MAC(ni->ni_vap, IEEE80211_MSG_ANY, wh->i_addr2, 1578178354Ssam "deny %s request, %s rate set mismatch, rate/MCS %d", 1579178354Ssam reassoc ? "reassoc" : "assoc", tag, rate & IEEE80211_RATE_VAL); 1580178354Ssam IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_BASIC_RATE); 1581178354Ssam ieee80211_node_leave(ni); 1582178354Ssam} 1583178354Ssam 1584178354Ssamstatic void 1585178354Ssamcapinfomismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh, 1586178354Ssam int reassoc, int resp, const char *tag, int capinfo) 1587178354Ssam{ 1588178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1589178354Ssam 1590178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ANY, wh->i_addr2, 1591178354Ssam "deny %s request, %s mismatch 0x%x", 1592178354Ssam reassoc ? "reassoc" : "assoc", tag, capinfo); 1593178354Ssam IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_CAPINFO); 1594178354Ssam ieee80211_node_leave(ni); 1595178354Ssam vap->iv_stats.is_rx_assoc_capmismatch++; 1596178354Ssam} 1597178354Ssam 1598178354Ssamstatic void 1599178354Ssamhtcapmismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh, 1600178354Ssam int reassoc, int resp) 1601178354Ssam{ 1602178354Ssam IEEE80211_NOTE_MAC(ni->ni_vap, IEEE80211_MSG_ANY, wh->i_addr2, 1603178354Ssam "deny %s request, %s missing HT ie", reassoc ? "reassoc" : "assoc"); 1604178354Ssam /* XXX no better code */ 1605178354Ssam IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_OTHER); 1606178354Ssam ieee80211_node_leave(ni); 1607178354Ssam} 1608178354Ssam 1609178354Ssamstatic void 1610178354Ssamauthalgreject(struct ieee80211_node *ni, const struct ieee80211_frame *wh, 1611178354Ssam int algo, int seq, int status) 1612178354Ssam{ 1613178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1614178354Ssam 1615178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1616178354Ssam wh, NULL, "unsupported alg %d", algo); 1617178354Ssam vap->iv_stats.is_rx_auth_unsupported++; 1618178354Ssam ieee80211_send_error(ni, wh->i_addr2, IEEE80211_FC0_SUBTYPE_AUTH, 1619178354Ssam seq | (status << 16)); 1620178354Ssam} 1621178354Ssam 1622178354Ssamstatic __inline int 1623178354Ssamishtmixed(const uint8_t *ie) 1624178354Ssam{ 1625178354Ssam const struct ieee80211_ie_htinfo *ht = 1626178354Ssam (const struct ieee80211_ie_htinfo *) ie; 1627178354Ssam return (ht->hi_byte2 & IEEE80211_HTINFO_OPMODE) == 1628178354Ssam IEEE80211_HTINFO_OPMODE_MIXED; 1629178354Ssam} 1630178354Ssam 1631178354Ssamstatic int 1632178354Ssamis11bclient(const uint8_t *rates, const uint8_t *xrates) 1633178354Ssam{ 1634178354Ssam static const uint32_t brates = (1<<2*1)|(1<<2*2)|(1<<11)|(1<<2*11); 1635178354Ssam int i; 1636178354Ssam 1637178354Ssam /* NB: the 11b clients we care about will not have xrates */ 1638178354Ssam if (xrates != NULL || rates == NULL) 1639178354Ssam return 0; 1640178354Ssam for (i = 0; i < rates[1]; i++) { 1641178354Ssam int r = rates[2+i] & IEEE80211_RATE_VAL; 1642178354Ssam if (r > 2*11 || ((1<<r) & brates) == 0) 1643178354Ssam return 0; 1644178354Ssam } 1645178354Ssam return 1; 1646178354Ssam} 1647178354Ssam 1648178354Ssamstatic void 1649178354Ssamhostap_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, 1650178354Ssam int subtype, int rssi, int noise, uint32_t rstamp) 1651178354Ssam{ 1652178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1653178354Ssam struct ieee80211com *ic = ni->ni_ic; 1654178354Ssam struct ieee80211_frame *wh; 1655178354Ssam uint8_t *frm, *efrm, *sfrm; 1656178354Ssam uint8_t *ssid, *rates, *xrates, *wpa, *rsn, *wme, *ath, *htcap; 1657178354Ssam int reassoc, resp; 1658178354Ssam uint8_t rate; 1659178354Ssam 1660178354Ssam wh = mtod(m0, struct ieee80211_frame *); 1661178354Ssam frm = (uint8_t *)&wh[1]; 1662178354Ssam efrm = mtod(m0, uint8_t *) + m0->m_len; 1663178354Ssam switch (subtype) { 1664178354Ssam case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1665178354Ssam case IEEE80211_FC0_SUBTYPE_BEACON: { 1666178354Ssam struct ieee80211_scanparams scan; 1667178354Ssam /* 1668178354Ssam * We process beacon/probe response frames when scanning; 1669178354Ssam * otherwise we check beacon frames for overlapping non-ERP 1670178354Ssam * BSS in 11g and/or overlapping legacy BSS when in HT. 1671178354Ssam */ 1672178354Ssam if ((ic->ic_flags & IEEE80211_F_SCAN) == 0 && 1673178354Ssam subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP) { 1674178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1675178354Ssam return; 1676178354Ssam } 1677178354Ssam /* NB: accept off-channel frames */ 1678178354Ssam if (ieee80211_parse_beacon(ni, m0, &scan) &~ IEEE80211_BPARSE_OFFCHAN) 1679178354Ssam return; 1680178354Ssam /* 1681178354Ssam * Count frame now that we know it's to be processed. 1682178354Ssam */ 1683178354Ssam if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1684178354Ssam vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1685178354Ssam IEEE80211_NODE_STAT(ni, rx_beacons); 1686178354Ssam } else 1687178354Ssam IEEE80211_NODE_STAT(ni, rx_proberesp); 1688178354Ssam /* 1689178354Ssam * If scanning, just pass information to the scan module. 1690178354Ssam */ 1691178354Ssam if (ic->ic_flags & IEEE80211_F_SCAN) { 1692178354Ssam if (scan.status == 0 && /* NB: on channel */ 1693178354Ssam (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN)) { 1694178354Ssam /* 1695178354Ssam * Actively scanning a channel marked passive; 1696178354Ssam * send a probe request now that we know there 1697178354Ssam * is 802.11 traffic present. 1698178354Ssam * 1699178354Ssam * XXX check if the beacon we recv'd gives 1700178354Ssam * us what we need and suppress the probe req 1701178354Ssam */ 1702178354Ssam ieee80211_probe_curchan(vap, 1); 1703178354Ssam ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 1704178354Ssam } 1705178354Ssam ieee80211_add_scan(vap, &scan, wh, 1706178354Ssam subtype, rssi, noise, rstamp); 1707178354Ssam return; 1708178354Ssam } 1709178354Ssam /* 1710178354Ssam * Check beacon for overlapping bss w/ non ERP stations. 1711178354Ssam * If we detect one and protection is configured but not 1712178354Ssam * enabled, enable it and start a timer that'll bring us 1713178354Ssam * out if we stop seeing the bss. 1714178354Ssam */ 1715178354Ssam if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 1716178354Ssam scan.status == 0 && /* NB: on-channel */ 1717178354Ssam ((scan.erp & 0x100) == 0 || /* NB: no ERP, 11b sta*/ 1718178354Ssam (scan.erp & IEEE80211_ERP_NON_ERP_PRESENT))) { 1719178354Ssam ic->ic_lastnonerp = ticks; 1720178354Ssam ic->ic_flags_ext |= IEEE80211_FEXT_NONERP_PR; 1721178354Ssam if (ic->ic_protmode != IEEE80211_PROT_NONE && 1722178354Ssam (ic->ic_flags & IEEE80211_F_USEPROT) == 0) { 1723178354Ssam IEEE80211_NOTE_FRAME(vap, 1724178354Ssam IEEE80211_MSG_ASSOC, wh, 1725178354Ssam "non-ERP present on channel %d " 1726178354Ssam "(saw erp 0x%x from channel %d), " 1727178354Ssam "enable use of protection", 1728178354Ssam ic->ic_curchan->ic_ieee, 1729178354Ssam scan.erp, scan.chan); 1730178354Ssam ic->ic_flags |= IEEE80211_F_USEPROT; 1731178354Ssam ieee80211_notify_erp(ic); 1732178354Ssam } 1733178354Ssam } 1734178354Ssam /* 1735178354Ssam * Check beacon for non-HT station on HT channel 1736178354Ssam * and update HT BSS occupancy as appropriate. 1737178354Ssam */ 1738178354Ssam if (IEEE80211_IS_CHAN_HT(ic->ic_curchan)) { 1739178354Ssam if (scan.status & IEEE80211_BPARSE_OFFCHAN) { 1740178354Ssam /* 1741178354Ssam * Off control channel; only check frames 1742178354Ssam * that come in the extension channel when 1743178354Ssam * operating w/ HT40. 1744178354Ssam */ 1745178354Ssam if (!IEEE80211_IS_CHAN_HT40(ic->ic_curchan)) 1746178354Ssam break; 1747178354Ssam if (scan.chan != ic->ic_curchan->ic_extieee) 1748178354Ssam break; 1749178354Ssam } 1750178354Ssam if (scan.htinfo == NULL) { 1751178354Ssam ieee80211_htprot_update(ic, 1752178354Ssam IEEE80211_HTINFO_OPMODE_PROTOPT | 1753178354Ssam IEEE80211_HTINFO_NONHT_PRESENT); 1754178354Ssam } else if (ishtmixed(scan.htinfo)) { 1755178354Ssam /* XXX? take NONHT_PRESENT from beacon? */ 1756178354Ssam ieee80211_htprot_update(ic, 1757178354Ssam IEEE80211_HTINFO_OPMODE_MIXED | 1758178354Ssam IEEE80211_HTINFO_NONHT_PRESENT); 1759178354Ssam } 1760178354Ssam } 1761178354Ssam break; 1762178354Ssam } 1763178354Ssam 1764178354Ssam case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 1765178354Ssam if (vap->iv_state != IEEE80211_S_RUN) { 1766178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1767178354Ssam return; 1768178354Ssam } 1769178354Ssam /* 1770178354Ssam * prreq frame format 1771178354Ssam * [tlv] ssid 1772178354Ssam * [tlv] supported rates 1773178354Ssam * [tlv] extended supported rates 1774178354Ssam */ 1775178354Ssam ssid = rates = xrates = NULL; 1776178354Ssam sfrm = frm; 1777178354Ssam while (efrm - frm > 1) { 1778178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 1779178354Ssam switch (*frm) { 1780178354Ssam case IEEE80211_ELEMID_SSID: 1781178354Ssam ssid = frm; 1782178354Ssam break; 1783178354Ssam case IEEE80211_ELEMID_RATES: 1784178354Ssam rates = frm; 1785178354Ssam break; 1786178354Ssam case IEEE80211_ELEMID_XRATES: 1787178354Ssam xrates = frm; 1788178354Ssam break; 1789178354Ssam } 1790178354Ssam frm += frm[1] + 2; 1791178354Ssam } 1792178354Ssam IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 1793178354Ssam if (xrates != NULL) 1794178354Ssam IEEE80211_VERIFY_ELEMENT(xrates, 1795178354Ssam IEEE80211_RATE_MAXSIZE - rates[1], return); 1796178354Ssam IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); 1797178354Ssam IEEE80211_VERIFY_SSID(vap->iv_bss, ssid, return); 1798178354Ssam if ((vap->iv_flags & IEEE80211_F_HIDESSID) && ssid[1] == 0) { 1799178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1800178354Ssam wh, NULL, 1801178354Ssam "%s", "no ssid with ssid suppression enabled"); 1802178354Ssam vap->iv_stats.is_rx_ssidmismatch++; /*XXX*/ 1803178354Ssam return; 1804178354Ssam } 1805178354Ssam 1806178354Ssam /* XXX find a better class or define it's own */ 1807178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2, 1808178354Ssam "%s", "recv probe req"); 1809178354Ssam /* 1810178354Ssam * Some legacy 11b clients cannot hack a complete 1811178354Ssam * probe response frame. When the request includes 1812178354Ssam * only a bare-bones rate set, communicate this to 1813178354Ssam * the transmit side. 1814178354Ssam */ 1815178354Ssam ieee80211_send_proberesp(vap, wh->i_addr2, 1816178354Ssam is11bclient(rates, xrates) ? IEEE80211_SEND_LEGACY_11B : 0); 1817178354Ssam break; 1818178354Ssam 1819178354Ssam case IEEE80211_FC0_SUBTYPE_AUTH: { 1820178354Ssam uint16_t algo, seq, status; 1821178354Ssam 1822178354Ssam if (vap->iv_state != IEEE80211_S_RUN) { 1823178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1824178354Ssam return; 1825178354Ssam } 1826178354Ssam if (!IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_bss->ni_bssid)) { 1827178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1828178354Ssam wh, NULL, "%s", "wrong bssid"); 1829178354Ssam vap->iv_stats.is_rx_wrongbss++; /*XXX unique stat?*/ 1830178354Ssam return; 1831178354Ssam } 1832178354Ssam /* 1833178354Ssam * auth frame format 1834178354Ssam * [2] algorithm 1835178354Ssam * [2] sequence 1836178354Ssam * [2] status 1837178354Ssam * [tlv*] challenge 1838178354Ssam */ 1839178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return); 1840178354Ssam algo = le16toh(*(uint16_t *)frm); 1841178354Ssam seq = le16toh(*(uint16_t *)(frm + 2)); 1842178354Ssam status = le16toh(*(uint16_t *)(frm + 4)); 1843178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr2, 1844178354Ssam "recv auth frame with algorithm %d seq %d", algo, seq); 1845178354Ssam /* 1846178354Ssam * Consult the ACL policy module if setup. 1847178354Ssam */ 1848178354Ssam if (vap->iv_acl != NULL && 1849178354Ssam !vap->iv_acl->iac_check(vap, wh->i_addr2)) { 1850178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1851178354Ssam wh, NULL, "%s", "disallowed by ACL"); 1852178354Ssam vap->iv_stats.is_rx_acl++; 1853178354Ssam ieee80211_send_error(ni, wh->i_addr2, 1854178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 1855178354Ssam (seq+1) | (IEEE80211_STATUS_UNSPECIFIED<<16)); 1856178354Ssam return; 1857178354Ssam } 1858178354Ssam if (vap->iv_flags & IEEE80211_F_COUNTERM) { 1859178354Ssam IEEE80211_DISCARD(vap, 1860178354Ssam IEEE80211_MSG_AUTH | IEEE80211_MSG_CRYPTO, 1861178354Ssam wh, NULL, "%s", "TKIP countermeasures enabled"); 1862178354Ssam vap->iv_stats.is_rx_auth_countermeasures++; 1863178354Ssam ieee80211_send_error(ni, wh->i_addr2, 1864178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 1865178354Ssam IEEE80211_REASON_MIC_FAILURE); 1866178354Ssam return; 1867178354Ssam } 1868178354Ssam if (algo == IEEE80211_AUTH_ALG_SHARED) 1869178354Ssam hostap_auth_shared(ni, wh, frm + 6, efrm, rssi, 1870178354Ssam noise, rstamp, seq, status); 1871178354Ssam else if (algo == IEEE80211_AUTH_ALG_OPEN) 1872178354Ssam hostap_auth_open(ni, wh, rssi, noise, rstamp, 1873178354Ssam seq, status); 1874178354Ssam else if (algo == IEEE80211_AUTH_ALG_LEAP) { 1875178354Ssam authalgreject(ni, wh, algo, 1876178354Ssam seq+1, IEEE80211_STATUS_ALG); 1877178354Ssam return; 1878178354Ssam } else { 1879178354Ssam /* 1880178354Ssam * We assume that an unknown algorithm is the result 1881178354Ssam * of a decryption failure on a shared key auth frame; 1882178354Ssam * return a status code appropriate for that instead 1883178354Ssam * of IEEE80211_STATUS_ALG. 1884178354Ssam * 1885178354Ssam * NB: a seq# of 4 is intentional; the decrypted 1886178354Ssam * frame likely has a bogus seq value. 1887178354Ssam */ 1888178354Ssam authalgreject(ni, wh, algo, 1889178354Ssam 4, IEEE80211_STATUS_CHALLENGE); 1890178354Ssam return; 1891178354Ssam } 1892178354Ssam break; 1893178354Ssam } 1894178354Ssam 1895178354Ssam case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 1896178354Ssam case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: { 1897178354Ssam uint16_t capinfo, lintval; 1898178354Ssam struct ieee80211_rsnparms rsnparms; 1899178354Ssam 1900178354Ssam if (vap->iv_state != IEEE80211_S_RUN) { 1901178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1902178354Ssam return; 1903178354Ssam } 1904178354Ssam if (!IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_bss->ni_bssid)) { 1905178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1906178354Ssam wh, NULL, "%s", "wrong bssid"); 1907178354Ssam vap->iv_stats.is_rx_assoc_bss++; 1908178354Ssam return; 1909178354Ssam } 1910178354Ssam if (subtype == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) { 1911178354Ssam reassoc = 1; 1912178354Ssam resp = IEEE80211_FC0_SUBTYPE_REASSOC_RESP; 1913178354Ssam } else { 1914178354Ssam reassoc = 0; 1915178354Ssam resp = IEEE80211_FC0_SUBTYPE_ASSOC_RESP; 1916178354Ssam } 1917178354Ssam if (ni == vap->iv_bss) { 1918178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ANY, wh->i_addr2, 1919178354Ssam "deny %s request, sta not authenticated", 1920178354Ssam reassoc ? "reassoc" : "assoc"); 1921178354Ssam ieee80211_send_error(ni, wh->i_addr2, 1922178354Ssam IEEE80211_FC0_SUBTYPE_DEAUTH, 1923178354Ssam IEEE80211_REASON_ASSOC_NOT_AUTHED); 1924178354Ssam vap->iv_stats.is_rx_assoc_notauth++; 1925178354Ssam return; 1926178354Ssam } 1927178354Ssam 1928178354Ssam /* 1929178354Ssam * asreq frame format 1930178354Ssam * [2] capability information 1931178354Ssam * [2] listen interval 1932178354Ssam * [6*] current AP address (reassoc only) 1933178354Ssam * [tlv] ssid 1934178354Ssam * [tlv] supported rates 1935178354Ssam * [tlv] extended supported rates 1936178354Ssam * [tlv] WPA or RSN 1937178354Ssam * [tlv] HT capabilities 1938178354Ssam * [tlv] Atheros capabilities 1939178354Ssam */ 1940178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, (reassoc ? 10 : 4), return); 1941178354Ssam capinfo = le16toh(*(uint16_t *)frm); frm += 2; 1942178354Ssam lintval = le16toh(*(uint16_t *)frm); frm += 2; 1943178354Ssam if (reassoc) 1944178354Ssam frm += 6; /* ignore current AP info */ 1945178354Ssam ssid = rates = xrates = wpa = rsn = wme = ath = htcap = NULL; 1946178354Ssam sfrm = frm; 1947178354Ssam while (efrm - frm > 1) { 1948178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 1949178354Ssam switch (*frm) { 1950178354Ssam case IEEE80211_ELEMID_SSID: 1951178354Ssam ssid = frm; 1952178354Ssam break; 1953178354Ssam case IEEE80211_ELEMID_RATES: 1954178354Ssam rates = frm; 1955178354Ssam break; 1956178354Ssam case IEEE80211_ELEMID_XRATES: 1957178354Ssam xrates = frm; 1958178354Ssam break; 1959178354Ssam case IEEE80211_ELEMID_RSN: 1960178354Ssam rsn = frm; 1961178354Ssam break; 1962178354Ssam case IEEE80211_ELEMID_HTCAP: 1963178354Ssam htcap = frm; 1964178354Ssam break; 1965178354Ssam case IEEE80211_ELEMID_VENDOR: 1966178354Ssam if (iswpaoui(frm)) 1967178354Ssam wpa = frm; 1968178354Ssam else if (iswmeinfo(frm)) 1969178354Ssam wme = frm; 1970178354Ssam else if (isatherosoui(frm)) 1971178354Ssam ath = frm; 1972178354Ssam else if (vap->iv_flags_ext & IEEE80211_FEXT_HTCOMPAT) { 1973178354Ssam if (ishtcapoui(frm) && htcap == NULL) 1974178354Ssam htcap = frm; 1975178354Ssam } 1976178354Ssam break; 1977178354Ssam } 1978178354Ssam frm += frm[1] + 2; 1979178354Ssam } 1980178354Ssam IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 1981178354Ssam if (xrates != NULL) 1982178354Ssam IEEE80211_VERIFY_ELEMENT(xrates, 1983178354Ssam IEEE80211_RATE_MAXSIZE - rates[1], return); 1984178354Ssam IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); 1985178354Ssam IEEE80211_VERIFY_SSID(vap->iv_bss, ssid, return); 1986178354Ssam if (htcap != NULL) { 1987178354Ssam IEEE80211_VERIFY_LENGTH(htcap[1], 1988178354Ssam htcap[0] == IEEE80211_ELEMID_VENDOR ? 1989178354Ssam 4 + sizeof(struct ieee80211_ie_htcap)-2 : 1990178354Ssam sizeof(struct ieee80211_ie_htcap)-2, 1991178354Ssam return); /* XXX just NULL out? */ 1992178354Ssam } 1993178354Ssam 1994178354Ssam if ((vap->iv_flags & IEEE80211_F_WPA) && 1995178354Ssam !wpa_assocreq(ni, &rsnparms, wh, wpa, rsn, capinfo)) 1996178354Ssam return; 1997178354Ssam /* discard challenge after association */ 1998178354Ssam if (ni->ni_challenge != NULL) { 1999186302Ssam free(ni->ni_challenge, M_80211_NODE); 2000178354Ssam ni->ni_challenge = NULL; 2001178354Ssam } 2002178354Ssam /* NB: 802.11 spec says to ignore station's privacy bit */ 2003178354Ssam if ((capinfo & IEEE80211_CAPINFO_ESS) == 0) { 2004178354Ssam capinfomismatch(ni, wh, reassoc, resp, 2005178354Ssam "capability", capinfo); 2006178354Ssam return; 2007178354Ssam } 2008178354Ssam /* 2009178354Ssam * Disallow re-associate w/ invalid slot time setting. 2010178354Ssam */ 2011178354Ssam if (ni->ni_associd != 0 && 2012178354Ssam IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2013178354Ssam ((ni->ni_capinfo ^ capinfo) & IEEE80211_CAPINFO_SHORT_SLOTTIME)) { 2014178354Ssam capinfomismatch(ni, wh, reassoc, resp, 2015178354Ssam "slot time", capinfo); 2016178354Ssam return; 2017178354Ssam } 2018178354Ssam rate = ieee80211_setup_rates(ni, rates, xrates, 2019178354Ssam IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 2020178354Ssam IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 2021178354Ssam if (rate & IEEE80211_RATE_BASIC) { 2022178354Ssam ratesetmismatch(ni, wh, reassoc, resp, "legacy", rate); 2023178354Ssam vap->iv_stats.is_rx_assoc_norate++; 2024178354Ssam return; 2025178354Ssam } 2026178354Ssam /* 2027178354Ssam * If constrained to 11g-only stations reject an 2028178354Ssam * 11b-only station. We cheat a bit here by looking 2029178354Ssam * at the max negotiated xmit rate and assuming anyone 2030178354Ssam * with a best rate <24Mb/s is an 11b station. 2031178354Ssam */ 2032178354Ssam if ((vap->iv_flags & IEEE80211_F_PUREG) && rate < 48) { 2033178354Ssam ratesetmismatch(ni, wh, reassoc, resp, "11g", rate); 2034178354Ssam vap->iv_stats.is_rx_assoc_norate++; 2035178354Ssam return; 2036178354Ssam } 2037178354Ssam /* 2038178354Ssam * Do HT rate set handling and setup HT node state. 2039178354Ssam */ 2040178354Ssam ni->ni_chan = vap->iv_bss->ni_chan; 2041178354Ssam if (IEEE80211_IS_CHAN_HT(ni->ni_chan) && htcap != NULL) { 2042178354Ssam rate = ieee80211_setup_htrates(ni, htcap, 2043178354Ssam IEEE80211_F_DOFMCS | IEEE80211_F_DONEGO | 2044178354Ssam IEEE80211_F_DOBRS); 2045178354Ssam if (rate & IEEE80211_RATE_BASIC) { 2046178354Ssam ratesetmismatch(ni, wh, reassoc, resp, 2047178354Ssam "HT", rate); 2048178354Ssam vap->iv_stats.is_ht_assoc_norate++; 2049178354Ssam return; 2050178354Ssam } 2051183254Ssam ieee80211_ht_node_init(ni); 2052183254Ssam ieee80211_ht_updatehtcap(ni, htcap); 2053178354Ssam } else if (ni->ni_flags & IEEE80211_NODE_HT) 2054178354Ssam ieee80211_ht_node_cleanup(ni); 2055178354Ssam /* 2056178354Ssam * Allow AMPDU operation only with unencrypted traffic 2057178354Ssam * or AES-CCM; the 11n spec only specifies these ciphers 2058178354Ssam * so permitting any others is undefined and can lead 2059178354Ssam * to interoperability problems. 2060178354Ssam */ 2061178354Ssam if ((ni->ni_flags & IEEE80211_NODE_HT) && 2062178354Ssam (((vap->iv_flags & IEEE80211_F_WPA) && 2063178354Ssam rsnparms.rsn_ucastcipher != IEEE80211_CIPHER_AES_CCM) || 2064178354Ssam (vap->iv_flags & (IEEE80211_F_WPA|IEEE80211_F_PRIVACY)) == IEEE80211_F_PRIVACY)) { 2065178354Ssam IEEE80211_NOTE(vap, 2066178354Ssam IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni, 2067178354Ssam "disallow HT use because WEP or TKIP requested, " 2068178354Ssam "capinfo 0x%x ucastcipher %d", capinfo, 2069178354Ssam rsnparms.rsn_ucastcipher); 2070178354Ssam ieee80211_ht_node_cleanup(ni); 2071178354Ssam vap->iv_stats.is_ht_assoc_downgrade++; 2072178354Ssam } 2073178354Ssam /* 2074178354Ssam * If constrained to 11n-only stations reject legacy stations. 2075178354Ssam */ 2076178354Ssam if ((vap->iv_flags_ext & IEEE80211_FEXT_PUREN) && 2077178354Ssam (ni->ni_flags & IEEE80211_NODE_HT) == 0) { 2078178354Ssam htcapmismatch(ni, wh, reassoc, resp); 2079178354Ssam vap->iv_stats.is_ht_assoc_nohtcap++; 2080178354Ssam return; 2081178354Ssam } 2082178354Ssam IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 2083178354Ssam ni->ni_noise = noise; 2084178354Ssam ni->ni_rstamp = rstamp; 2085178354Ssam ni->ni_intval = lintval; 2086178354Ssam ni->ni_capinfo = capinfo; 2087178354Ssam ni->ni_fhdwell = vap->iv_bss->ni_fhdwell; 2088178354Ssam ni->ni_fhindex = vap->iv_bss->ni_fhindex; 2089178354Ssam /* 2090178354Ssam * Store the IEs. 2091178354Ssam * XXX maybe better to just expand 2092178354Ssam */ 2093178354Ssam if (ieee80211_ies_init(&ni->ni_ies, sfrm, efrm - sfrm)) { 2094178354Ssam#define setie(_ie, _off) ieee80211_ies_setie(ni->ni_ies, _ie, _off) 2095178354Ssam if (wpa != NULL) 2096178354Ssam setie(wpa_ie, wpa - sfrm); 2097178354Ssam if (rsn != NULL) 2098178354Ssam setie(rsn_ie, rsn - sfrm); 2099178354Ssam if (htcap != NULL) 2100178354Ssam setie(htcap_ie, htcap - sfrm); 2101178354Ssam if (wme != NULL) { 2102178354Ssam setie(wme_ie, wme - sfrm); 2103178354Ssam /* 2104178354Ssam * Mark node as capable of QoS. 2105178354Ssam */ 2106178354Ssam ni->ni_flags |= IEEE80211_NODE_QOS; 2107178354Ssam } else 2108178354Ssam ni->ni_flags &= ~IEEE80211_NODE_QOS; 2109178354Ssam if (ath != NULL) { 2110178354Ssam setie(ath_ie, ath - sfrm); 2111178354Ssam /* 2112178354Ssam * Parse ATH station parameters. 2113178354Ssam */ 2114178354Ssam ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 2115178354Ssam } else 2116178354Ssam ni->ni_ath_flags = 0; 2117178354Ssam#undef setie 2118178354Ssam } else { 2119178354Ssam ni->ni_flags &= ~IEEE80211_NODE_QOS; 2120178354Ssam ni->ni_ath_flags = 0; 2121178354Ssam } 2122178354Ssam ieee80211_node_join(ni, resp); 2123178354Ssam ieee80211_deliver_l2uf(ni); 2124178354Ssam break; 2125178354Ssam } 2126178354Ssam 2127178354Ssam case IEEE80211_FC0_SUBTYPE_DEAUTH: 2128178354Ssam case IEEE80211_FC0_SUBTYPE_DISASSOC: { 2129178354Ssam uint16_t reason; 2130178354Ssam 2131178354Ssam if (vap->iv_state != IEEE80211_S_RUN || 2132178354Ssam /* NB: can happen when in promiscuous mode */ 2133178354Ssam !IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) { 2134178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 2135178354Ssam break; 2136178354Ssam } 2137178354Ssam /* 2138178354Ssam * deauth/disassoc frame format 2139178354Ssam * [2] reason 2140178354Ssam */ 2141178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return); 2142178354Ssam reason = le16toh(*(uint16_t *)frm); 2143178354Ssam if (subtype == IEEE80211_FC0_SUBTYPE_DEAUTH) { 2144178354Ssam vap->iv_stats.is_rx_deauth++; 2145178354Ssam IEEE80211_NODE_STAT(ni, rx_deauth); 2146178354Ssam } else { 2147178354Ssam vap->iv_stats.is_rx_disassoc++; 2148178354Ssam IEEE80211_NODE_STAT(ni, rx_disassoc); 2149178354Ssam } 2150178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni, 2151178354Ssam "recv %s (reason %d)", ieee80211_mgt_subtype_name[subtype >> 2152178354Ssam IEEE80211_FC0_SUBTYPE_SHIFT], reason); 2153178354Ssam if (ni != vap->iv_bss) 2154178354Ssam ieee80211_node_leave(ni); 2155178354Ssam break; 2156178354Ssam } 2157178354Ssam 2158178354Ssam case IEEE80211_FC0_SUBTYPE_ACTION: 2159178354Ssam if (vap->iv_state == IEEE80211_S_RUN) { 2160178354Ssam if (ieee80211_parse_action(ni, m0) == 0) 2161178354Ssam ic->ic_recv_action(ni, frm, efrm); 2162178354Ssam } else 2163178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 2164178354Ssam break; 2165178354Ssam 2166178354Ssam case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 2167178354Ssam case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 2168178354Ssam default: 2169178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 2170178354Ssam wh, "mgt", "subtype 0x%x not handled", subtype); 2171178354Ssam vap->iv_stats.is_rx_badsubtype++; 2172178354Ssam break; 2173178354Ssam } 2174178354Ssam} 2175178354Ssam 2176178354Ssam/* 2177178354Ssam * Process a received ps-poll frame. 2178178354Ssam */ 2179178354Ssamstatic void 2180178354Ssamhostap_recv_pspoll(struct ieee80211_node *ni, struct mbuf *m0) 2181178354Ssam{ 2182178354Ssam struct ieee80211vap *vap = ni->ni_vap; 2183178354Ssam struct ieee80211_frame_min *wh; 2184184288Ssam struct ifnet *ifp; 2185178354Ssam struct mbuf *m; 2186178354Ssam uint16_t aid; 2187178354Ssam int qlen; 2188178354Ssam 2189178354Ssam wh = mtod(m0, struct ieee80211_frame_min *); 2190178354Ssam if (ni->ni_associd == 0) { 2191178354Ssam IEEE80211_DISCARD(vap, 2192178354Ssam IEEE80211_MSG_POWER | IEEE80211_MSG_DEBUG, 2193178354Ssam (struct ieee80211_frame *) wh, NULL, 2194178354Ssam "%s", "unassociated station"); 2195178354Ssam vap->iv_stats.is_ps_unassoc++; 2196178354Ssam IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, 2197178354Ssam IEEE80211_REASON_NOT_ASSOCED); 2198178354Ssam return; 2199178354Ssam } 2200178354Ssam 2201178354Ssam aid = le16toh(*(uint16_t *)wh->i_dur); 2202178354Ssam if (aid != ni->ni_associd) { 2203178354Ssam IEEE80211_DISCARD(vap, 2204178354Ssam IEEE80211_MSG_POWER | IEEE80211_MSG_DEBUG, 2205178354Ssam (struct ieee80211_frame *) wh, NULL, 2206178354Ssam "aid mismatch: sta aid 0x%x poll aid 0x%x", 2207178354Ssam ni->ni_associd, aid); 2208178354Ssam vap->iv_stats.is_ps_badaid++; 2209180837Ssam /* 2210180837Ssam * NB: We used to deauth the station but it turns out 2211180837Ssam * the Blackberry Curve 8230 (and perhaps other devices) 2212180837Ssam * sometimes send the wrong AID when WME is negotiated. 2213180837Ssam * Being more lenient here seems ok as we already check 2214180837Ssam * the station is associated and we only return frames 2215180837Ssam * queued for the station (i.e. we don't use the AID). 2216180837Ssam */ 2217178354Ssam return; 2218178354Ssam } 2219178354Ssam 2220178354Ssam /* Okay, take the first queued packet and put it out... */ 2221184288Ssam m = ieee80211_node_psq_dequeue(ni, &qlen); 2222178354Ssam if (m == NULL) { 2223178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_POWER, wh->i_addr2, 2224178354Ssam "%s", "recv ps-poll, but queue empty"); 2225178354Ssam ieee80211_send_nulldata(ieee80211_ref_node(ni)); 2226178354Ssam vap->iv_stats.is_ps_qempty++; /* XXX node stat */ 2227178354Ssam if (vap->iv_set_tim != NULL) 2228178354Ssam vap->iv_set_tim(ni, 0); /* just in case */ 2229178354Ssam return; 2230178354Ssam } 2231178354Ssam /* 2232178354Ssam * If there are more packets, set the more packets bit 2233178354Ssam * in the packet dispatched to the station; otherwise 2234178354Ssam * turn off the TIM bit. 2235178354Ssam */ 2236178354Ssam if (qlen != 0) { 2237178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 2238178354Ssam "recv ps-poll, send packet, %u still queued", qlen); 2239178354Ssam m->m_flags |= M_MORE_DATA; 2240178354Ssam } else { 2241178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 2242178354Ssam "%s", "recv ps-poll, send packet, queue empty"); 2243178354Ssam if (vap->iv_set_tim != NULL) 2244178354Ssam vap->iv_set_tim(ni, 0); 2245178354Ssam } 2246178354Ssam m->m_flags |= M_PWR_SAV; /* bypass PS handling */ 2247184288Ssam 2248184288Ssam if (m->m_flags & M_ENCAP) 2249184288Ssam ifp = vap->iv_ic->ic_ifp; 2250184288Ssam else 2251184288Ssam ifp = vap->iv_ifp; 2252178354Ssam IF_ENQUEUE(&ifp->if_snd, m); 2253178354Ssam if_start(ifp); 2254178354Ssam} 2255