ieee80211_hostap.c revision 193413
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 193413 2009-06-03 23:30:25Z sam $"); 29178354Ssam#endif 30178354Ssam 31178354Ssam/* 32178354Ssam * IEEE 802.11 HOSTAP mode support. 33178354Ssam */ 34178354Ssam#include "opt_inet.h" 35178354Ssam#include "opt_wlan.h" 36178354Ssam 37178354Ssam#include <sys/param.h> 38178354Ssam#include <sys/systm.h> 39178354Ssam#include <sys/mbuf.h> 40178354Ssam#include <sys/malloc.h> 41178354Ssam#include <sys/kernel.h> 42178354Ssam 43178354Ssam#include <sys/socket.h> 44178354Ssam#include <sys/sockio.h> 45178354Ssam#include <sys/endian.h> 46178354Ssam#include <sys/errno.h> 47178354Ssam#include <sys/proc.h> 48178354Ssam#include <sys/sysctl.h> 49178354Ssam 50178354Ssam#include <net/if.h> 51178354Ssam#include <net/if_media.h> 52178354Ssam#include <net/if_llc.h> 53178354Ssam#include <net/ethernet.h> 54178354Ssam 55178354Ssam#include <net/bpf.h> 56178354Ssam 57178354Ssam#include <net80211/ieee80211_var.h> 58178354Ssam#include <net80211/ieee80211_hostap.h> 59178354Ssam#include <net80211/ieee80211_input.h> 60190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 61190391Ssam#include <net80211/ieee80211_superg.h> 62190391Ssam#endif 63178354Ssam#include <net80211/ieee80211_wds.h> 64178354Ssam 65178354Ssam#define IEEE80211_RATE2MBS(r) (((r) & IEEE80211_RATE_VAL) / 2) 66178354Ssam 67178354Ssamstatic void hostap_vattach(struct ieee80211vap *); 68178354Ssamstatic int hostap_newstate(struct ieee80211vap *, enum ieee80211_state, int); 69178354Ssamstatic int hostap_input(struct ieee80211_node *ni, struct mbuf *m, 70192468Ssam int rssi, int nf); 71178354Ssamstatic void hostap_deliver_data(struct ieee80211vap *, 72178354Ssam struct ieee80211_node *, struct mbuf *); 73178354Ssamstatic void hostap_recv_mgmt(struct ieee80211_node *, struct mbuf *, 74192468Ssam int subtype, int rssi, int nf); 75191546Ssamstatic void hostap_recv_ctl(struct ieee80211_node *, struct mbuf *, int); 76178354Ssamstatic void hostap_recv_pspoll(struct ieee80211_node *, struct mbuf *); 77178354Ssam 78178354Ssamvoid 79178354Ssamieee80211_hostap_attach(struct ieee80211com *ic) 80178354Ssam{ 81178354Ssam ic->ic_vattach[IEEE80211_M_HOSTAP] = hostap_vattach; 82178354Ssam} 83178354Ssam 84178354Ssamvoid 85178354Ssamieee80211_hostap_detach(struct ieee80211com *ic) 86178354Ssam{ 87178354Ssam} 88178354Ssam 89178354Ssamstatic void 90178354Ssamhostap_vdetach(struct ieee80211vap *vap) 91178354Ssam{ 92178354Ssam} 93178354Ssam 94178354Ssamstatic void 95178354Ssamhostap_vattach(struct ieee80211vap *vap) 96178354Ssam{ 97178354Ssam vap->iv_newstate = hostap_newstate; 98178354Ssam vap->iv_input = hostap_input; 99178354Ssam vap->iv_recv_mgmt = hostap_recv_mgmt; 100191546Ssam vap->iv_recv_ctl = hostap_recv_ctl; 101178354Ssam vap->iv_opdetach = hostap_vdetach; 102178354Ssam vap->iv_deliver_data = hostap_deliver_data; 103178354Ssam} 104178354Ssam 105178354Ssamstatic void 106178354Ssamsta_disassoc(void *arg, struct ieee80211_node *ni) 107178354Ssam{ 108178354Ssam struct ieee80211vap *vap = arg; 109178354Ssam 110178354Ssam if (ni->ni_vap == vap && ni->ni_associd != 0) { 111178354Ssam IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DISASSOC, 112178354Ssam IEEE80211_REASON_ASSOC_LEAVE); 113178354Ssam ieee80211_node_leave(ni); 114178354Ssam } 115178354Ssam} 116178354Ssam 117193413Ssamstatic void 118193413Ssamsta_csa(void *arg, struct ieee80211_node *ni) 119193413Ssam{ 120193413Ssam struct ieee80211vap *vap = arg; 121193413Ssam 122193413Ssam if (ni->ni_vap == vap && ni->ni_associd != 0) 123193413Ssam if (ni->ni_inact > vap->iv_inact_init) { 124193413Ssam ni->ni_inact = vap->iv_inact_init; 125193413Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 126193413Ssam "%s: inact %u", __func__, ni->ni_inact); 127193413Ssam } 128193413Ssam} 129193413Ssam 130178354Ssam/* 131178354Ssam * IEEE80211_M_HOSTAP vap state machine handler. 132178354Ssam */ 133178354Ssamstatic int 134178354Ssamhostap_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 135178354Ssam{ 136178354Ssam struct ieee80211com *ic = vap->iv_ic; 137178354Ssam enum ieee80211_state ostate; 138178354Ssam 139178354Ssam IEEE80211_LOCK_ASSERT(ic); 140178354Ssam 141178354Ssam ostate = vap->iv_state; 142178354Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", 143178354Ssam __func__, ieee80211_state_name[ostate], 144178354Ssam ieee80211_state_name[nstate], arg); 145178354Ssam vap->iv_state = nstate; /* state transition */ 146178354Ssam if (ostate != IEEE80211_S_SCAN) 147178354Ssam ieee80211_cancel_scan(vap); /* background scan */ 148178354Ssam switch (nstate) { 149178354Ssam case IEEE80211_S_INIT: 150178354Ssam switch (ostate) { 151178354Ssam case IEEE80211_S_SCAN: 152178354Ssam ieee80211_cancel_scan(vap); 153178354Ssam break; 154178354Ssam case IEEE80211_S_CAC: 155178354Ssam ieee80211_dfs_cac_stop(vap); 156178354Ssam break; 157178354Ssam case IEEE80211_S_RUN: 158178354Ssam ieee80211_iterate_nodes(&ic->ic_sta, sta_disassoc, vap); 159178354Ssam break; 160178354Ssam default: 161178354Ssam break; 162178354Ssam } 163178354Ssam if (ostate != IEEE80211_S_INIT) { 164178354Ssam /* NB: optimize INIT -> INIT case */ 165178354Ssam ieee80211_reset_bss(vap); 166178354Ssam } 167178354Ssam if (vap->iv_auth->ia_detach != NULL) 168178354Ssam vap->iv_auth->ia_detach(vap); 169178354Ssam break; 170178354Ssam case IEEE80211_S_SCAN: 171178354Ssam switch (ostate) { 172178354Ssam case IEEE80211_S_CSA: 173178354Ssam case IEEE80211_S_RUN: 174178354Ssam ieee80211_iterate_nodes(&ic->ic_sta, sta_disassoc, vap); 175178354Ssam /* 176178354Ssam * Clear overlapping BSS state; the beacon frame 177178354Ssam * will be reconstructed on transition to the RUN 178178354Ssam * state and the timeout routines check if the flag 179178354Ssam * is set before doing anything so this is sufficient. 180178354Ssam */ 181178354Ssam ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; 182178354Ssam ic->ic_flags_ext &= ~IEEE80211_FEXT_NONHT_PR; 183178354Ssam /* fall thru... */ 184178354Ssam case IEEE80211_S_CAC: 185178354Ssam /* 186178354Ssam * NB: We may get here because of a manual channel 187178354Ssam * change in which case we need to stop CAC 188178354Ssam * XXX no need to stop if ostate RUN but it's ok 189178354Ssam */ 190178354Ssam ieee80211_dfs_cac_stop(vap); 191178354Ssam /* fall thru... */ 192178354Ssam case IEEE80211_S_INIT: 193178354Ssam if (vap->iv_des_chan != IEEE80211_CHAN_ANYC && 194178354Ssam !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan)) { 195178354Ssam /* 196178354Ssam * Already have a channel; bypass the 197178354Ssam * scan and startup immediately. 198178354Ssam * ieee80211_create_ibss will call back to 199178354Ssam * move us to RUN state. 200178354Ssam */ 201178354Ssam ieee80211_create_ibss(vap, vap->iv_des_chan); 202178354Ssam break; 203178354Ssam } 204178354Ssam /* 205178354Ssam * Initiate a scan. We can come here as a result 206178354Ssam * of an IEEE80211_IOC_SCAN_REQ too in which case 207178354Ssam * the vap will be marked with IEEE80211_FEXT_SCANREQ 208178354Ssam * and the scan request parameters will be present 209178354Ssam * in iv_scanreq. Otherwise we do the default. 210178354Ssam */ 211178354Ssam if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { 212178354Ssam ieee80211_check_scan(vap, 213178354Ssam vap->iv_scanreq_flags, 214178354Ssam vap->iv_scanreq_duration, 215178354Ssam vap->iv_scanreq_mindwell, 216178354Ssam vap->iv_scanreq_maxdwell, 217178354Ssam vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); 218178354Ssam vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; 219178354Ssam } else 220178354Ssam ieee80211_check_scan_current(vap); 221178354Ssam break; 222178354Ssam case IEEE80211_S_SCAN: 223178354Ssam /* 224178354Ssam * A state change requires a reset; scan. 225178354Ssam */ 226178354Ssam ieee80211_check_scan_current(vap); 227178354Ssam break; 228178354Ssam default: 229178354Ssam break; 230178354Ssam } 231178354Ssam break; 232178354Ssam case IEEE80211_S_CAC: 233178354Ssam /* 234178354Ssam * Start CAC on a DFS channel. We come here when starting 235178354Ssam * a bss on a DFS channel (see ieee80211_create_ibss). 236178354Ssam */ 237178354Ssam ieee80211_dfs_cac_start(vap); 238178354Ssam break; 239178354Ssam case IEEE80211_S_RUN: 240178354Ssam if (vap->iv_flags & IEEE80211_F_WPA) { 241178354Ssam /* XXX validate prerequisites */ 242178354Ssam } 243178354Ssam switch (ostate) { 244178354Ssam case IEEE80211_S_INIT: 245178354Ssam /* 246178354Ssam * Already have a channel; bypass the 247178354Ssam * scan and startup immediately. 248178354Ssam * Note that ieee80211_create_ibss will call 249178354Ssam * back to do a RUN->RUN state change. 250178354Ssam */ 251178354Ssam ieee80211_create_ibss(vap, 252178354Ssam ieee80211_ht_adjust_channel(ic, 253178354Ssam ic->ic_curchan, vap->iv_flags_ext)); 254178354Ssam /* NB: iv_bss is changed on return */ 255178354Ssam break; 256178354Ssam case IEEE80211_S_CAC: 257178354Ssam /* 258178354Ssam * NB: This is the normal state change when CAC 259178354Ssam * expires and no radar was detected; no need to 260178354Ssam * clear the CAC timer as it's already expired. 261178354Ssam */ 262178354Ssam /* fall thru... */ 263178354Ssam case IEEE80211_S_CSA: 264178354Ssam /* 265193413Ssam * Shorten inactivity timer of associated stations 266193413Ssam * to weed out sta's that don't follow a CSA. 267193413Ssam */ 268193413Ssam ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap); 269193413Ssam /* 270178354Ssam * Update bss node channel to reflect where 271178354Ssam * we landed after CSA. 272178354Ssam */ 273178354Ssam ieee80211_node_set_chan(vap->iv_bss, 274178354Ssam ieee80211_ht_adjust_channel(ic, ic->ic_curchan, 275178354Ssam ieee80211_htchanflags(vap->iv_bss->ni_chan))); 276178354Ssam /* XXX bypass debug msgs */ 277178354Ssam break; 278178354Ssam case IEEE80211_S_SCAN: 279178354Ssam case IEEE80211_S_RUN: 280178354Ssam#ifdef IEEE80211_DEBUG 281178354Ssam if (ieee80211_msg_debug(vap)) { 282178354Ssam struct ieee80211_node *ni = vap->iv_bss; 283178354Ssam ieee80211_note(vap, 284178354Ssam "synchronized with %s ssid ", 285178354Ssam ether_sprintf(ni->ni_bssid)); 286178354Ssam ieee80211_print_essid(ni->ni_essid, 287178354Ssam ni->ni_esslen); 288178354Ssam /* XXX MCS/HT */ 289178354Ssam printf(" channel %d start %uMb\n", 290178354Ssam ieee80211_chan2ieee(ic, ic->ic_curchan), 291178354Ssam IEEE80211_RATE2MBS(ni->ni_txrate)); 292178354Ssam } 293178354Ssam#endif 294178354Ssam break; 295178354Ssam default: 296178354Ssam break; 297178354Ssam } 298178354Ssam /* 299178354Ssam * Start/stop the authenticator. We delay until here 300178354Ssam * to allow configuration to happen out of order. 301178354Ssam */ 302178354Ssam if (vap->iv_auth->ia_attach != NULL) { 303178354Ssam /* XXX check failure */ 304178354Ssam vap->iv_auth->ia_attach(vap); 305178354Ssam } else if (vap->iv_auth->ia_detach != NULL) { 306178354Ssam vap->iv_auth->ia_detach(vap); 307178354Ssam } 308178354Ssam ieee80211_node_authorize(vap->iv_bss); 309178354Ssam break; 310178354Ssam default: 311178354Ssam break; 312178354Ssam } 313178354Ssam return 0; 314178354Ssam} 315178354Ssam 316178354Ssamstatic void 317178354Ssamhostap_deliver_data(struct ieee80211vap *vap, 318178354Ssam struct ieee80211_node *ni, struct mbuf *m) 319178354Ssam{ 320178354Ssam struct ether_header *eh = mtod(m, struct ether_header *); 321178354Ssam struct ifnet *ifp = vap->iv_ifp; 322178354Ssam 323193292Ssam /* clear driver/net80211 flags before passing up */ 324193292Ssam m->m_flags &= ~(M_80211_RX | M_MCAST | M_BCAST); 325193292Ssam 326178354Ssam KASSERT(vap->iv_opmode == IEEE80211_M_HOSTAP, 327178354Ssam ("gack, opmode %d", vap->iv_opmode)); 328178354Ssam /* 329178354Ssam * Do accounting. 330178354Ssam */ 331178354Ssam ifp->if_ipackets++; 332178354Ssam IEEE80211_NODE_STAT(ni, rx_data); 333178354Ssam IEEE80211_NODE_STAT_ADD(ni, rx_bytes, m->m_pkthdr.len); 334178354Ssam if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 335178354Ssam m->m_flags |= M_MCAST; /* XXX M_BCAST? */ 336178354Ssam IEEE80211_NODE_STAT(ni, rx_mcast); 337178354Ssam } else 338178354Ssam IEEE80211_NODE_STAT(ni, rx_ucast); 339178354Ssam 340178354Ssam /* perform as a bridge within the AP */ 341178354Ssam if ((vap->iv_flags & IEEE80211_F_NOBRIDGE) == 0) { 342178354Ssam struct mbuf *mcopy = NULL; 343178354Ssam 344178354Ssam if (m->m_flags & M_MCAST) { 345183364Ssam mcopy = m_dup(m, M_DONTWAIT); 346178354Ssam if (mcopy == NULL) 347178354Ssam ifp->if_oerrors++; 348178354Ssam else 349178354Ssam mcopy->m_flags |= M_MCAST; 350178354Ssam } else { 351178354Ssam /* 352178354Ssam * Check if the destination is associated with the 353178354Ssam * same vap and authorized to receive traffic. 354178354Ssam * Beware of traffic destined for the vap itself; 355178354Ssam * sending it will not work; just let it be delivered 356178354Ssam * normally. 357178354Ssam */ 358178354Ssam struct ieee80211_node *sta = ieee80211_find_vap_node( 359178354Ssam &vap->iv_ic->ic_sta, vap, eh->ether_dhost); 360178354Ssam if (sta != NULL) { 361178354Ssam if (ieee80211_node_is_authorized(sta)) { 362178354Ssam /* 363178354Ssam * Beware of sending to ourself; this 364178354Ssam * needs to happen via the normal 365178354Ssam * input path. 366178354Ssam */ 367178354Ssam if (sta != vap->iv_bss) { 368178354Ssam mcopy = m; 369178354Ssam m = NULL; 370178354Ssam } 371178354Ssam } else { 372178354Ssam vap->iv_stats.is_rx_unauth++; 373178354Ssam IEEE80211_NODE_STAT(sta, rx_unauth); 374178354Ssam } 375178354Ssam ieee80211_free_node(sta); 376178354Ssam } 377178354Ssam } 378178354Ssam if (mcopy != NULL) { 379178354Ssam int len, err; 380178354Ssam len = mcopy->m_pkthdr.len; 381186658Ssam err = ifp->if_transmit(ifp, mcopy); 382178354Ssam if (err) { 383178354Ssam /* NB: IFQ_HANDOFF reclaims mcopy */ 384178354Ssam } else { 385178354Ssam ifp->if_opackets++; 386178354Ssam } 387178354Ssam } 388178354Ssam } 389178354Ssam if (m != NULL) { 390178354Ssam /* 391178354Ssam * Mark frame as coming from vap's interface. 392178354Ssam */ 393178354Ssam m->m_pkthdr.rcvif = ifp; 394178354Ssam if (m->m_flags & M_MCAST) { 395178354Ssam /* 396178354Ssam * Spam DWDS vap's w/ multicast traffic. 397178354Ssam */ 398178354Ssam /* XXX only if dwds in use? */ 399178354Ssam ieee80211_dwds_mcast(vap, m); 400178354Ssam } 401178354Ssam if (ni->ni_vlan != 0) { 402178354Ssam /* attach vlan tag */ 403178354Ssam m->m_pkthdr.ether_vtag = ni->ni_vlan; 404178354Ssam m->m_flags |= M_VLANTAG; 405178354Ssam } 406178354Ssam ifp->if_input(ifp, m); 407178354Ssam } 408178354Ssam} 409178354Ssam 410178354Ssam/* 411178354Ssam * Decide if a received management frame should be 412178354Ssam * printed when debugging is enabled. This filters some 413178354Ssam * of the less interesting frames that come frequently 414178354Ssam * (e.g. beacons). 415178354Ssam */ 416178354Ssamstatic __inline int 417178354Ssamdoprint(struct ieee80211vap *vap, int subtype) 418178354Ssam{ 419178354Ssam switch (subtype) { 420178354Ssam case IEEE80211_FC0_SUBTYPE_BEACON: 421178354Ssam return (vap->iv_ic->ic_flags & IEEE80211_F_SCAN); 422178354Ssam case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 423178354Ssam return 0; 424178354Ssam } 425178354Ssam return 1; 426178354Ssam} 427178354Ssam 428178354Ssam/* 429178354Ssam * Process a received frame. The node associated with the sender 430178354Ssam * should be supplied. If nothing was found in the node table then 431178354Ssam * the caller is assumed to supply a reference to iv_bss instead. 432178354Ssam * The RSSI and a timestamp are also supplied. The RSSI data is used 433178354Ssam * during AP scanning to select a AP to associate with; it can have 434178354Ssam * any units so long as values have consistent units and higher values 435178354Ssam * mean ``better signal''. The receive timestamp is currently not used 436178354Ssam * by the 802.11 layer. 437178354Ssam */ 438178354Ssamstatic int 439192468Ssamhostap_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf) 440178354Ssam{ 441178354Ssam#define SEQ_LEQ(a,b) ((int)((a)-(b)) <= 0) 442178354Ssam#define HAS_SEQ(type) ((type & 0x4) == 0) 443178354Ssam struct ieee80211vap *vap = ni->ni_vap; 444178354Ssam struct ieee80211com *ic = ni->ni_ic; 445178354Ssam struct ifnet *ifp = vap->iv_ifp; 446178354Ssam struct ieee80211_frame *wh; 447178354Ssam struct ieee80211_key *key; 448178354Ssam struct ether_header *eh; 449178354Ssam int hdrspace, need_tap; 450178354Ssam uint8_t dir, type, subtype, qos; 451178354Ssam uint8_t *bssid; 452178354Ssam uint16_t rxseq; 453178354Ssam 454183247Ssam if (m->m_flags & M_AMPDU_MPDU) { 455178354Ssam /* 456178354Ssam * Fastpath for A-MPDU reorder q resubmission. Frames 457183247Ssam * w/ M_AMPDU_MPDU marked have already passed through 458183247Ssam * here but were received out of order and been held on 459183247Ssam * the reorder queue. When resubmitted they are marked 460183247Ssam * with the M_AMPDU_MPDU flag and we can bypass most of 461183247Ssam * the normal processing. 462178354Ssam */ 463178354Ssam wh = mtod(m, struct ieee80211_frame *); 464178354Ssam type = IEEE80211_FC0_TYPE_DATA; 465178354Ssam dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 466178354Ssam subtype = IEEE80211_FC0_SUBTYPE_QOS; 467178354Ssam hdrspace = ieee80211_hdrspace(ic, wh); /* XXX optimize? */ 468178354Ssam goto resubmit_ampdu; 469178354Ssam } 470178354Ssam 471178354Ssam KASSERT(ni != NULL, ("null node")); 472178354Ssam ni->ni_inact = ni->ni_inact_reload; 473178354Ssam 474178354Ssam need_tap = 1; /* mbuf need to be tapped. */ 475178354Ssam type = -1; /* undefined */ 476178354Ssam 477178354Ssam if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 478178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 479178354Ssam ni->ni_macaddr, NULL, 480178354Ssam "too short (1): len %u", m->m_pkthdr.len); 481178354Ssam vap->iv_stats.is_rx_tooshort++; 482178354Ssam goto out; 483178354Ssam } 484178354Ssam /* 485178354Ssam * Bit of a cheat here, we use a pointer for a 3-address 486178354Ssam * frame format but don't reference fields past outside 487178354Ssam * ieee80211_frame_min w/o first validating the data is 488178354Ssam * present. 489178354Ssam */ 490178354Ssam wh = mtod(m, struct ieee80211_frame *); 491178354Ssam 492178354Ssam if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 493178354Ssam IEEE80211_FC0_VERSION_0) { 494178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 495191547Ssam ni->ni_macaddr, NULL, "wrong version, fc %02x:%02x", 496191547Ssam wh->i_fc[0], wh->i_fc[1]); 497178354Ssam vap->iv_stats.is_rx_badversion++; 498178354Ssam goto err; 499178354Ssam } 500178354Ssam 501178354Ssam dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 502178354Ssam type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 503178354Ssam subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 504178354Ssam if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 505178354Ssam if (dir != IEEE80211_FC1_DIR_NODS) 506178354Ssam bssid = wh->i_addr1; 507178354Ssam else if (type == IEEE80211_FC0_TYPE_CTL) 508178354Ssam bssid = wh->i_addr1; 509178354Ssam else { 510178354Ssam if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 511178354Ssam IEEE80211_DISCARD_MAC(vap, 512178354Ssam IEEE80211_MSG_ANY, ni->ni_macaddr, 513178354Ssam NULL, "too short (2): len %u", 514178354Ssam m->m_pkthdr.len); 515178354Ssam vap->iv_stats.is_rx_tooshort++; 516178354Ssam goto out; 517178354Ssam } 518178354Ssam bssid = wh->i_addr3; 519178354Ssam } 520178354Ssam /* 521178354Ssam * Validate the bssid. 522178354Ssam */ 523178354Ssam if (!(type == IEEE80211_FC0_TYPE_MGT && 524178354Ssam subtype == IEEE80211_FC0_SUBTYPE_BEACON) && 525178354Ssam !IEEE80211_ADDR_EQ(bssid, vap->iv_bss->ni_bssid) && 526178354Ssam !IEEE80211_ADDR_EQ(bssid, ifp->if_broadcastaddr)) { 527178354Ssam /* not interested in */ 528178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 529178354Ssam bssid, NULL, "%s", "not to bss"); 530178354Ssam vap->iv_stats.is_rx_wrongbss++; 531178354Ssam goto out; 532178354Ssam } 533178354Ssam 534178354Ssam IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 535192468Ssam ni->ni_noise = nf; 536178354Ssam if (HAS_SEQ(type)) { 537178354Ssam uint8_t tid = ieee80211_gettid(wh); 538178354Ssam if (IEEE80211_QOS_HAS_SEQ(wh) && 539178354Ssam TID_TO_WME_AC(tid) >= WME_AC_VI) 540178354Ssam ic->ic_wme.wme_hipri_traffic++; 541178354Ssam rxseq = le16toh(*(uint16_t *)wh->i_seq); 542178354Ssam if ((ni->ni_flags & IEEE80211_NODE_HT) == 0 && 543178354Ssam (wh->i_fc[1] & IEEE80211_FC1_RETRY) && 544178354Ssam SEQ_LEQ(rxseq, ni->ni_rxseqs[tid])) { 545178354Ssam /* duplicate, discard */ 546178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 547178354Ssam bssid, "duplicate", 548178354Ssam "seqno <%u,%u> fragno <%u,%u> tid %u", 549178354Ssam rxseq >> IEEE80211_SEQ_SEQ_SHIFT, 550178354Ssam ni->ni_rxseqs[tid] >> 551178354Ssam IEEE80211_SEQ_SEQ_SHIFT, 552178354Ssam rxseq & IEEE80211_SEQ_FRAG_MASK, 553178354Ssam ni->ni_rxseqs[tid] & 554178354Ssam IEEE80211_SEQ_FRAG_MASK, 555178354Ssam tid); 556178354Ssam vap->iv_stats.is_rx_dup++; 557178354Ssam IEEE80211_NODE_STAT(ni, rx_dup); 558178354Ssam goto out; 559178354Ssam } 560178354Ssam ni->ni_rxseqs[tid] = rxseq; 561178354Ssam } 562178354Ssam } 563178354Ssam 564178354Ssam switch (type) { 565178354Ssam case IEEE80211_FC0_TYPE_DATA: 566178354Ssam hdrspace = ieee80211_hdrspace(ic, wh); 567178354Ssam if (m->m_len < hdrspace && 568178354Ssam (m = m_pullup(m, hdrspace)) == NULL) { 569178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 570178354Ssam ni->ni_macaddr, NULL, 571178354Ssam "data too short: expecting %u", hdrspace); 572178354Ssam vap->iv_stats.is_rx_tooshort++; 573178354Ssam goto out; /* XXX */ 574178354Ssam } 575178354Ssam if (!(dir == IEEE80211_FC1_DIR_TODS || 576178354Ssam (dir == IEEE80211_FC1_DIR_DSTODS && 577178354Ssam (vap->iv_flags & IEEE80211_F_DWDS)))) { 578178354Ssam if (dir != IEEE80211_FC1_DIR_DSTODS) { 579178354Ssam IEEE80211_DISCARD(vap, 580178354Ssam IEEE80211_MSG_INPUT, wh, "data", 581178354Ssam "incorrect dir 0x%x", dir); 582178354Ssam } else { 583178354Ssam IEEE80211_DISCARD(vap, 584178354Ssam IEEE80211_MSG_INPUT | 585178354Ssam IEEE80211_MSG_WDS, wh, 586178354Ssam "4-address data", 587178354Ssam "%s", "DWDS not enabled"); 588178354Ssam } 589178354Ssam vap->iv_stats.is_rx_wrongdir++; 590178354Ssam goto out; 591178354Ssam } 592178354Ssam /* check if source STA is associated */ 593178354Ssam if (ni == vap->iv_bss) { 594178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 595178354Ssam wh, "data", "%s", "unknown src"); 596178354Ssam ieee80211_send_error(ni, wh->i_addr2, 597178354Ssam IEEE80211_FC0_SUBTYPE_DEAUTH, 598178354Ssam IEEE80211_REASON_NOT_AUTHED); 599178354Ssam vap->iv_stats.is_rx_notassoc++; 600178354Ssam goto err; 601178354Ssam } 602178354Ssam if (ni->ni_associd == 0) { 603178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 604178354Ssam wh, "data", "%s", "unassoc src"); 605178354Ssam IEEE80211_SEND_MGMT(ni, 606178354Ssam IEEE80211_FC0_SUBTYPE_DISASSOC, 607178354Ssam IEEE80211_REASON_NOT_ASSOCED); 608178354Ssam vap->iv_stats.is_rx_notassoc++; 609178354Ssam goto err; 610178354Ssam } 611178354Ssam 612178354Ssam /* 613178354Ssam * Check for power save state change. 614178354Ssam * XXX out-of-order A-MPDU frames? 615178354Ssam */ 616178354Ssam if (((wh->i_fc[1] & IEEE80211_FC1_PWR_MGT) ^ 617178354Ssam (ni->ni_flags & IEEE80211_NODE_PWR_MGT))) 618178354Ssam ieee80211_node_pwrsave(ni, 619178354Ssam wh->i_fc[1] & IEEE80211_FC1_PWR_MGT); 620178354Ssam /* 621178354Ssam * For 4-address packets handle WDS discovery 622178354Ssam * notifications. Once a WDS link is setup frames 623178354Ssam * are just delivered to the WDS vap (see below). 624178354Ssam */ 625178354Ssam if (dir == IEEE80211_FC1_DIR_DSTODS && ni->ni_wdsvap == NULL) { 626178354Ssam if (!ieee80211_node_is_authorized(ni)) { 627178354Ssam IEEE80211_DISCARD(vap, 628178354Ssam IEEE80211_MSG_INPUT | 629178354Ssam IEEE80211_MSG_WDS, wh, 630178354Ssam "4-address data", 631178354Ssam "%s", "unauthorized port"); 632178354Ssam vap->iv_stats.is_rx_unauth++; 633178354Ssam IEEE80211_NODE_STAT(ni, rx_unauth); 634178354Ssam goto err; 635178354Ssam } 636178354Ssam ieee80211_dwds_discover(ni, m); 637178354Ssam return type; 638178354Ssam } 639178354Ssam 640178354Ssam /* 641183247Ssam * Handle A-MPDU re-ordering. If the frame is to be 642183247Ssam * processed directly then ieee80211_ampdu_reorder 643178354Ssam * will return 0; otherwise it has consumed the mbuf 644178354Ssam * and we should do nothing more with it. 645178354Ssam */ 646183247Ssam if ((m->m_flags & M_AMPDU) && 647178354Ssam ieee80211_ampdu_reorder(ni, m) != 0) { 648178354Ssam m = NULL; 649178354Ssam goto out; 650178354Ssam } 651178354Ssam resubmit_ampdu: 652178354Ssam 653178354Ssam /* 654178354Ssam * Handle privacy requirements. Note that we 655178354Ssam * must not be preempted from here until after 656178354Ssam * we (potentially) call ieee80211_crypto_demic; 657178354Ssam * otherwise we may violate assumptions in the 658178354Ssam * crypto cipher modules used to do delayed update 659178354Ssam * of replay sequence numbers. 660178354Ssam */ 661178354Ssam if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 662178354Ssam if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 663178354Ssam /* 664178354Ssam * Discard encrypted frames when privacy is off. 665178354Ssam */ 666178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 667178354Ssam wh, "WEP", "%s", "PRIVACY off"); 668178354Ssam vap->iv_stats.is_rx_noprivacy++; 669178354Ssam IEEE80211_NODE_STAT(ni, rx_noprivacy); 670178354Ssam goto out; 671178354Ssam } 672178354Ssam key = ieee80211_crypto_decap(ni, m, hdrspace); 673178354Ssam if (key == NULL) { 674178354Ssam /* NB: stats+msgs handled in crypto_decap */ 675178354Ssam IEEE80211_NODE_STAT(ni, rx_wepfail); 676178354Ssam goto out; 677178354Ssam } 678178354Ssam wh = mtod(m, struct ieee80211_frame *); 679178354Ssam wh->i_fc[1] &= ~IEEE80211_FC1_WEP; 680178354Ssam } else { 681178354Ssam /* XXX M_WEP and IEEE80211_F_PRIVACY */ 682178354Ssam key = NULL; 683178354Ssam } 684178354Ssam 685178354Ssam /* 686178354Ssam * Save QoS bits for use below--before we strip the header. 687178354Ssam */ 688178354Ssam if (subtype == IEEE80211_FC0_SUBTYPE_QOS) { 689178354Ssam qos = (dir == IEEE80211_FC1_DIR_DSTODS) ? 690178354Ssam ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] : 691178354Ssam ((struct ieee80211_qosframe *)wh)->i_qos[0]; 692178354Ssam } else 693178354Ssam qos = 0; 694178354Ssam 695178354Ssam /* 696178354Ssam * Next up, any fragmentation. 697178354Ssam */ 698178354Ssam if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 699178354Ssam m = ieee80211_defrag(ni, m, hdrspace); 700178354Ssam if (m == NULL) { 701178354Ssam /* Fragment dropped or frame not complete yet */ 702178354Ssam goto out; 703178354Ssam } 704178354Ssam } 705178354Ssam wh = NULL; /* no longer valid, catch any uses */ 706178354Ssam 707178354Ssam /* 708178354Ssam * Next strip any MSDU crypto bits. 709178354Ssam */ 710178354Ssam if (key != NULL && !ieee80211_crypto_demic(vap, key, m, 0)) { 711178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 712178354Ssam ni->ni_macaddr, "data", "%s", "demic error"); 713178354Ssam vap->iv_stats.is_rx_demicfail++; 714178354Ssam IEEE80211_NODE_STAT(ni, rx_demicfail); 715178354Ssam goto out; 716178354Ssam } 717178354Ssam /* copy to listener after decrypt */ 718192468Ssam if (ieee80211_radiotap_active_vap(vap)) 719192468Ssam ieee80211_radiotap_rx(vap, m); 720178354Ssam need_tap = 0; 721178354Ssam /* 722178354Ssam * Finally, strip the 802.11 header. 723178354Ssam */ 724178354Ssam m = ieee80211_decap(vap, m, hdrspace); 725178354Ssam if (m == NULL) { 726178354Ssam /* XXX mask bit to check for both */ 727178354Ssam /* don't count Null data frames as errors */ 728178354Ssam if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 729178354Ssam subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 730178354Ssam goto out; 731178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 732178354Ssam ni->ni_macaddr, "data", "%s", "decap error"); 733178354Ssam vap->iv_stats.is_rx_decap++; 734178354Ssam IEEE80211_NODE_STAT(ni, rx_decap); 735178354Ssam goto err; 736178354Ssam } 737178354Ssam eh = mtod(m, struct ether_header *); 738178354Ssam if (!ieee80211_node_is_authorized(ni)) { 739178354Ssam /* 740178354Ssam * Deny any non-PAE frames received prior to 741178354Ssam * authorization. For open/shared-key 742178354Ssam * authentication the port is mark authorized 743178354Ssam * after authentication completes. For 802.1x 744178354Ssam * the port is not marked authorized by the 745178354Ssam * authenticator until the handshake has completed. 746178354Ssam */ 747178354Ssam if (eh->ether_type != htons(ETHERTYPE_PAE)) { 748178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 749178354Ssam eh->ether_shost, "data", 750178354Ssam "unauthorized port: ether type 0x%x len %u", 751178354Ssam eh->ether_type, m->m_pkthdr.len); 752178354Ssam vap->iv_stats.is_rx_unauth++; 753178354Ssam IEEE80211_NODE_STAT(ni, rx_unauth); 754178354Ssam goto err; 755178354Ssam } 756178354Ssam } else { 757178354Ssam /* 758178354Ssam * When denying unencrypted frames, discard 759178354Ssam * any non-PAE frames received without encryption. 760178354Ssam */ 761178354Ssam if ((vap->iv_flags & IEEE80211_F_DROPUNENC) && 762178354Ssam (key == NULL && (m->m_flags & M_WEP) == 0) && 763178354Ssam eh->ether_type != htons(ETHERTYPE_PAE)) { 764178354Ssam /* 765178354Ssam * Drop unencrypted frames. 766178354Ssam */ 767178354Ssam vap->iv_stats.is_rx_unencrypted++; 768178354Ssam IEEE80211_NODE_STAT(ni, rx_unencrypted); 769178354Ssam goto out; 770178354Ssam } 771178354Ssam } 772178354Ssam /* XXX require HT? */ 773178354Ssam if (qos & IEEE80211_QOS_AMSDU) { 774178354Ssam m = ieee80211_decap_amsdu(ni, m); 775178354Ssam if (m == NULL) 776178354Ssam return IEEE80211_FC0_TYPE_DATA; 777190391Ssam } else { 778190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 779190391Ssam m = ieee80211_decap_fastframe(vap, ni, m); 780190391Ssam if (m == NULL) 781178354Ssam return IEEE80211_FC0_TYPE_DATA; 782190391Ssam#endif 783178354Ssam } 784178354Ssam if (dir == IEEE80211_FC1_DIR_DSTODS && ni->ni_wdsvap != NULL) 785178354Ssam ieee80211_deliver_data(ni->ni_wdsvap, ni, m); 786178354Ssam else 787178354Ssam hostap_deliver_data(vap, ni, m); 788178354Ssam return IEEE80211_FC0_TYPE_DATA; 789178354Ssam 790178354Ssam case IEEE80211_FC0_TYPE_MGT: 791178354Ssam vap->iv_stats.is_rx_mgmt++; 792178354Ssam IEEE80211_NODE_STAT(ni, rx_mgmt); 793178354Ssam if (dir != IEEE80211_FC1_DIR_NODS) { 794178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 795178354Ssam wh, "mgt", "incorrect dir 0x%x", dir); 796178354Ssam vap->iv_stats.is_rx_wrongdir++; 797178354Ssam goto err; 798178354Ssam } 799178354Ssam if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 800178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 801178354Ssam ni->ni_macaddr, "mgt", "too short: len %u", 802178354Ssam m->m_pkthdr.len); 803178354Ssam vap->iv_stats.is_rx_tooshort++; 804178354Ssam goto out; 805178354Ssam } 806178354Ssam if (IEEE80211_IS_MULTICAST(wh->i_addr2)) { 807178354Ssam /* ensure return frames are unicast */ 808178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 809178354Ssam wh, NULL, "source is multicast: %s", 810178354Ssam ether_sprintf(wh->i_addr2)); 811178354Ssam vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */ 812178354Ssam goto out; 813178354Ssam } 814178354Ssam#ifdef IEEE80211_DEBUG 815178354Ssam if ((ieee80211_msg_debug(vap) && doprint(vap, subtype)) || 816178354Ssam ieee80211_msg_dumppkts(vap)) { 817178354Ssam if_printf(ifp, "received %s from %s rssi %d\n", 818178354Ssam ieee80211_mgt_subtype_name[subtype >> 819178354Ssam IEEE80211_FC0_SUBTYPE_SHIFT], 820178354Ssam ether_sprintf(wh->i_addr2), rssi); 821178354Ssam } 822178354Ssam#endif 823178354Ssam if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 824178354Ssam if (subtype != IEEE80211_FC0_SUBTYPE_AUTH) { 825178354Ssam /* 826178354Ssam * Only shared key auth frames with a challenge 827178354Ssam * should be encrypted, discard all others. 828178354Ssam */ 829178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 830178354Ssam wh, NULL, 831178354Ssam "%s", "WEP set but not permitted"); 832178354Ssam vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 833178354Ssam goto out; 834178354Ssam } 835178354Ssam if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 836178354Ssam /* 837178354Ssam * Discard encrypted frames when privacy is off. 838178354Ssam */ 839178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 840178354Ssam wh, NULL, "%s", "WEP set but PRIVACY off"); 841178354Ssam vap->iv_stats.is_rx_noprivacy++; 842178354Ssam goto out; 843178354Ssam } 844178354Ssam hdrspace = ieee80211_hdrspace(ic, wh); 845178354Ssam key = ieee80211_crypto_decap(ni, m, hdrspace); 846178354Ssam if (key == NULL) { 847178354Ssam /* NB: stats+msgs handled in crypto_decap */ 848178354Ssam goto out; 849178354Ssam } 850178354Ssam wh = mtod(m, struct ieee80211_frame *); 851178354Ssam wh->i_fc[1] &= ~IEEE80211_FC1_WEP; 852178354Ssam } 853192468Ssam vap->iv_recv_mgmt(ni, m, subtype, rssi, nf); 854191534Ssam goto out; 855178354Ssam 856178354Ssam case IEEE80211_FC0_TYPE_CTL: 857178354Ssam vap->iv_stats.is_rx_ctl++; 858178354Ssam IEEE80211_NODE_STAT(ni, rx_ctrl); 859191546Ssam vap->iv_recv_ctl(ni, m, subtype); 860178354Ssam goto out; 861178354Ssam default: 862178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 863178354Ssam wh, "bad", "frame type 0x%x", type); 864178354Ssam /* should not come here */ 865178354Ssam break; 866178354Ssam } 867178354Ssamerr: 868178354Ssam ifp->if_ierrors++; 869178354Ssamout: 870178354Ssam if (m != NULL) { 871192765Ssam if (need_tap && ieee80211_radiotap_active_vap(vap)) 872192468Ssam ieee80211_radiotap_rx(vap, m); 873178354Ssam m_freem(m); 874178354Ssam } 875178354Ssam return type; 876178354Ssam#undef SEQ_LEQ 877178354Ssam} 878178354Ssam 879178354Ssamstatic void 880178354Ssamhostap_auth_open(struct ieee80211_node *ni, struct ieee80211_frame *wh, 881192468Ssam int rssi, int nf, uint16_t seq, uint16_t status) 882178354Ssam{ 883178354Ssam struct ieee80211vap *vap = ni->ni_vap; 884178354Ssam 885178354Ssam KASSERT(vap->iv_state == IEEE80211_S_RUN, ("state %d", vap->iv_state)); 886178354Ssam 887178354Ssam if (ni->ni_authmode == IEEE80211_AUTH_SHARED) { 888178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 889178354Ssam ni->ni_macaddr, "open auth", 890178354Ssam "bad sta auth mode %u", ni->ni_authmode); 891178354Ssam vap->iv_stats.is_rx_bad_auth++; /* XXX */ 892178354Ssam /* 893178354Ssam * Clear any challenge text that may be there if 894178354Ssam * a previous shared key auth failed and then an 895178354Ssam * open auth is attempted. 896178354Ssam */ 897178354Ssam if (ni->ni_challenge != NULL) { 898186302Ssam free(ni->ni_challenge, M_80211_NODE); 899178354Ssam ni->ni_challenge = NULL; 900178354Ssam } 901178354Ssam /* XXX hack to workaround calling convention */ 902178354Ssam ieee80211_send_error(ni, wh->i_addr2, 903178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 904178354Ssam (seq + 1) | (IEEE80211_STATUS_ALG<<16)); 905178354Ssam return; 906178354Ssam } 907178354Ssam if (seq != IEEE80211_AUTH_OPEN_REQUEST) { 908178354Ssam vap->iv_stats.is_rx_bad_auth++; 909178354Ssam return; 910178354Ssam } 911178354Ssam /* always accept open authentication requests */ 912178354Ssam if (ni == vap->iv_bss) { 913178354Ssam ni = ieee80211_dup_bss(vap, wh->i_addr2); 914178354Ssam if (ni == NULL) 915178354Ssam return; 916178354Ssam } else if ((ni->ni_flags & IEEE80211_NODE_AREF) == 0) 917178354Ssam (void) ieee80211_ref_node(ni); 918178354Ssam /* 919178354Ssam * Mark the node as referenced to reflect that it's 920178354Ssam * reference count has been bumped to insure it remains 921178354Ssam * after the transaction completes. 922178354Ssam */ 923178354Ssam ni->ni_flags |= IEEE80211_NODE_AREF; 924186099Ssam /* 925186151Ssam * Mark the node as requiring a valid association id 926186099Ssam * before outbound traffic is permitted. 927186099Ssam */ 928186099Ssam ni->ni_flags |= IEEE80211_NODE_ASSOCID; 929178354Ssam 930178354Ssam if (vap->iv_acl != NULL && 931178354Ssam vap->iv_acl->iac_getpolicy(vap) == IEEE80211_MACCMD_POLICY_RADIUS) { 932178354Ssam /* 933178354Ssam * When the ACL policy is set to RADIUS we defer the 934178354Ssam * authorization to a user agent. Dispatch an event, 935178354Ssam * a subsequent MLME call will decide the fate of the 936178354Ssam * station. If the user agent is not present then the 937178354Ssam * node will be reclaimed due to inactivity. 938178354Ssam */ 939178354Ssam IEEE80211_NOTE_MAC(vap, 940178354Ssam IEEE80211_MSG_AUTH | IEEE80211_MSG_ACL, ni->ni_macaddr, 941178354Ssam "%s", "station authentication defered (radius acl)"); 942178354Ssam ieee80211_notify_node_auth(ni); 943178354Ssam } else { 944178354Ssam IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, seq + 1); 945178354Ssam IEEE80211_NOTE_MAC(vap, 946178354Ssam IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, ni->ni_macaddr, 947178354Ssam "%s", "station authenticated (open)"); 948178354Ssam /* 949178354Ssam * When 802.1x is not in use mark the port 950178354Ssam * authorized at this point so traffic can flow. 951178354Ssam */ 952178354Ssam if (ni->ni_authmode != IEEE80211_AUTH_8021X) 953178354Ssam ieee80211_node_authorize(ni); 954178354Ssam } 955178354Ssam} 956178354Ssam 957178354Ssamstatic void 958178354Ssamhostap_auth_shared(struct ieee80211_node *ni, struct ieee80211_frame *wh, 959192468Ssam uint8_t *frm, uint8_t *efrm, int rssi, int nf, 960178354Ssam uint16_t seq, uint16_t status) 961178354Ssam{ 962178354Ssam struct ieee80211vap *vap = ni->ni_vap; 963178354Ssam uint8_t *challenge; 964178354Ssam int allocbs, estatus; 965178354Ssam 966178354Ssam KASSERT(vap->iv_state == IEEE80211_S_RUN, ("state %d", vap->iv_state)); 967178354Ssam 968178354Ssam /* 969178354Ssam * NB: this can happen as we allow pre-shared key 970178354Ssam * authentication to be enabled w/o wep being turned 971178354Ssam * on so that configuration of these can be done 972178354Ssam * in any order. It may be better to enforce the 973178354Ssam * ordering in which case this check would just be 974178354Ssam * for sanity/consistency. 975178354Ssam */ 976178354Ssam if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 977178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 978178354Ssam ni->ni_macaddr, "shared key auth", 979178354Ssam "%s", " PRIVACY is disabled"); 980178354Ssam estatus = IEEE80211_STATUS_ALG; 981178354Ssam goto bad; 982178354Ssam } 983178354Ssam /* 984178354Ssam * Pre-shared key authentication is evil; accept 985178354Ssam * it only if explicitly configured (it is supported 986178354Ssam * mainly for compatibility with clients like Mac OS X). 987178354Ssam */ 988178354Ssam if (ni->ni_authmode != IEEE80211_AUTH_AUTO && 989178354Ssam ni->ni_authmode != IEEE80211_AUTH_SHARED) { 990178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 991178354Ssam ni->ni_macaddr, "shared key auth", 992178354Ssam "bad sta auth mode %u", ni->ni_authmode); 993178354Ssam vap->iv_stats.is_rx_bad_auth++; /* XXX maybe a unique error? */ 994178354Ssam estatus = IEEE80211_STATUS_ALG; 995178354Ssam goto bad; 996178354Ssam } 997178354Ssam 998178354Ssam challenge = NULL; 999178354Ssam if (frm + 1 < efrm) { 1000178354Ssam if ((frm[1] + 2) > (efrm - frm)) { 1001178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1002178354Ssam ni->ni_macaddr, "shared key auth", 1003178354Ssam "ie %d/%d too long", 1004178354Ssam frm[0], (frm[1] + 2) - (efrm - frm)); 1005178354Ssam vap->iv_stats.is_rx_bad_auth++; 1006178354Ssam estatus = IEEE80211_STATUS_CHALLENGE; 1007178354Ssam goto bad; 1008178354Ssam } 1009178354Ssam if (*frm == IEEE80211_ELEMID_CHALLENGE) 1010178354Ssam challenge = frm; 1011178354Ssam frm += frm[1] + 2; 1012178354Ssam } 1013178354Ssam switch (seq) { 1014178354Ssam case IEEE80211_AUTH_SHARED_CHALLENGE: 1015178354Ssam case IEEE80211_AUTH_SHARED_RESPONSE: 1016178354Ssam if (challenge == NULL) { 1017178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1018178354Ssam ni->ni_macaddr, "shared key auth", 1019178354Ssam "%s", "no challenge"); 1020178354Ssam vap->iv_stats.is_rx_bad_auth++; 1021178354Ssam estatus = IEEE80211_STATUS_CHALLENGE; 1022178354Ssam goto bad; 1023178354Ssam } 1024178354Ssam if (challenge[1] != IEEE80211_CHALLENGE_LEN) { 1025178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1026178354Ssam ni->ni_macaddr, "shared key auth", 1027178354Ssam "bad challenge len %d", challenge[1]); 1028178354Ssam vap->iv_stats.is_rx_bad_auth++; 1029178354Ssam estatus = IEEE80211_STATUS_CHALLENGE; 1030178354Ssam goto bad; 1031178354Ssam } 1032178354Ssam default: 1033178354Ssam break; 1034178354Ssam } 1035178354Ssam switch (seq) { 1036178354Ssam case IEEE80211_AUTH_SHARED_REQUEST: 1037178354Ssam if (ni == vap->iv_bss) { 1038178354Ssam ni = ieee80211_dup_bss(vap, wh->i_addr2); 1039178354Ssam if (ni == NULL) { 1040178354Ssam /* NB: no way to return an error */ 1041178354Ssam return; 1042178354Ssam } 1043178354Ssam allocbs = 1; 1044178354Ssam } else { 1045178354Ssam if ((ni->ni_flags & IEEE80211_NODE_AREF) == 0) 1046178354Ssam (void) ieee80211_ref_node(ni); 1047178354Ssam allocbs = 0; 1048178354Ssam } 1049178354Ssam /* 1050178354Ssam * Mark the node as referenced to reflect that it's 1051178354Ssam * reference count has been bumped to insure it remains 1052178354Ssam * after the transaction completes. 1053178354Ssam */ 1054178354Ssam ni->ni_flags |= IEEE80211_NODE_AREF; 1055186099Ssam /* 1056186099Ssam * Mark the node as requiring a valid associatio id 1057186099Ssam * before outbound traffic is permitted. 1058186099Ssam */ 1059186099Ssam ni->ni_flags |= IEEE80211_NODE_ASSOCID; 1060178354Ssam IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 1061192468Ssam ni->ni_noise = nf; 1062178354Ssam if (!ieee80211_alloc_challenge(ni)) { 1063178354Ssam /* NB: don't return error so they rexmit */ 1064178354Ssam return; 1065178354Ssam } 1066178354Ssam get_random_bytes(ni->ni_challenge, 1067178354Ssam IEEE80211_CHALLENGE_LEN); 1068178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, 1069178354Ssam ni, "shared key %sauth request", allocbs ? "" : "re"); 1070178354Ssam /* 1071178354Ssam * When the ACL policy is set to RADIUS we defer the 1072178354Ssam * authorization to a user agent. Dispatch an event, 1073178354Ssam * a subsequent MLME call will decide the fate of the 1074178354Ssam * station. If the user agent is not present then the 1075178354Ssam * node will be reclaimed due to inactivity. 1076178354Ssam */ 1077178354Ssam if (vap->iv_acl != NULL && 1078178354Ssam vap->iv_acl->iac_getpolicy(vap) == IEEE80211_MACCMD_POLICY_RADIUS) { 1079178354Ssam IEEE80211_NOTE_MAC(vap, 1080178354Ssam IEEE80211_MSG_AUTH | IEEE80211_MSG_ACL, 1081178354Ssam ni->ni_macaddr, 1082178354Ssam "%s", "station authentication defered (radius acl)"); 1083178354Ssam ieee80211_notify_node_auth(ni); 1084178354Ssam return; 1085178354Ssam } 1086178354Ssam break; 1087178354Ssam case IEEE80211_AUTH_SHARED_RESPONSE: 1088178354Ssam if (ni == vap->iv_bss) { 1089178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1090178354Ssam ni->ni_macaddr, "shared key response", 1091178354Ssam "%s", "unknown station"); 1092178354Ssam /* NB: don't send a response */ 1093178354Ssam return; 1094178354Ssam } 1095178354Ssam if (ni->ni_challenge == NULL) { 1096178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1097178354Ssam ni->ni_macaddr, "shared key response", 1098178354Ssam "%s", "no challenge recorded"); 1099178354Ssam vap->iv_stats.is_rx_bad_auth++; 1100178354Ssam estatus = IEEE80211_STATUS_CHALLENGE; 1101178354Ssam goto bad; 1102178354Ssam } 1103178354Ssam if (memcmp(ni->ni_challenge, &challenge[2], 1104178354Ssam challenge[1]) != 0) { 1105178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1106178354Ssam ni->ni_macaddr, "shared key response", 1107178354Ssam "%s", "challenge mismatch"); 1108178354Ssam vap->iv_stats.is_rx_auth_fail++; 1109178354Ssam estatus = IEEE80211_STATUS_CHALLENGE; 1110178354Ssam goto bad; 1111178354Ssam } 1112178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, 1113178354Ssam ni, "%s", "station authenticated (shared key)"); 1114178354Ssam ieee80211_node_authorize(ni); 1115178354Ssam break; 1116178354Ssam default: 1117178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1118178354Ssam ni->ni_macaddr, "shared key auth", 1119178354Ssam "bad seq %d", seq); 1120178354Ssam vap->iv_stats.is_rx_bad_auth++; 1121178354Ssam estatus = IEEE80211_STATUS_SEQUENCE; 1122178354Ssam goto bad; 1123178354Ssam } 1124178354Ssam IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, seq + 1); 1125178354Ssam return; 1126178354Ssambad: 1127178354Ssam /* 1128178354Ssam * Send an error response; but only when operating as an AP. 1129178354Ssam */ 1130178354Ssam /* XXX hack to workaround calling convention */ 1131178354Ssam ieee80211_send_error(ni, wh->i_addr2, 1132178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 1133178354Ssam (seq + 1) | (estatus<<16)); 1134178354Ssam} 1135178354Ssam 1136178354Ssam/* 1137178354Ssam * Convert a WPA cipher selector OUI to an internal 1138178354Ssam * cipher algorithm. Where appropriate we also 1139178354Ssam * record any key length. 1140178354Ssam */ 1141178354Ssamstatic int 1142178354Ssamwpa_cipher(const uint8_t *sel, uint8_t *keylen) 1143178354Ssam{ 1144178354Ssam#define WPA_SEL(x) (((x)<<24)|WPA_OUI) 1145178354Ssam uint32_t w = LE_READ_4(sel); 1146178354Ssam 1147178354Ssam switch (w) { 1148178354Ssam case WPA_SEL(WPA_CSE_NULL): 1149178354Ssam return IEEE80211_CIPHER_NONE; 1150178354Ssam case WPA_SEL(WPA_CSE_WEP40): 1151178354Ssam if (keylen) 1152178354Ssam *keylen = 40 / NBBY; 1153178354Ssam return IEEE80211_CIPHER_WEP; 1154178354Ssam case WPA_SEL(WPA_CSE_WEP104): 1155178354Ssam if (keylen) 1156178354Ssam *keylen = 104 / NBBY; 1157178354Ssam return IEEE80211_CIPHER_WEP; 1158178354Ssam case WPA_SEL(WPA_CSE_TKIP): 1159178354Ssam return IEEE80211_CIPHER_TKIP; 1160178354Ssam case WPA_SEL(WPA_CSE_CCMP): 1161178354Ssam return IEEE80211_CIPHER_AES_CCM; 1162178354Ssam } 1163178354Ssam return 32; /* NB: so 1<< is discarded */ 1164178354Ssam#undef WPA_SEL 1165178354Ssam} 1166178354Ssam 1167178354Ssam/* 1168178354Ssam * Convert a WPA key management/authentication algorithm 1169178354Ssam * to an internal code. 1170178354Ssam */ 1171178354Ssamstatic int 1172178354Ssamwpa_keymgmt(const uint8_t *sel) 1173178354Ssam{ 1174178354Ssam#define WPA_SEL(x) (((x)<<24)|WPA_OUI) 1175178354Ssam uint32_t w = LE_READ_4(sel); 1176178354Ssam 1177178354Ssam switch (w) { 1178178354Ssam case WPA_SEL(WPA_ASE_8021X_UNSPEC): 1179178354Ssam return WPA_ASE_8021X_UNSPEC; 1180178354Ssam case WPA_SEL(WPA_ASE_8021X_PSK): 1181178354Ssam return WPA_ASE_8021X_PSK; 1182178354Ssam case WPA_SEL(WPA_ASE_NONE): 1183178354Ssam return WPA_ASE_NONE; 1184178354Ssam } 1185178354Ssam return 0; /* NB: so is discarded */ 1186178354Ssam#undef WPA_SEL 1187178354Ssam} 1188178354Ssam 1189178354Ssam/* 1190178354Ssam * Parse a WPA information element to collect parameters. 1191178354Ssam * Note that we do not validate security parameters; that 1192178354Ssam * is handled by the authenticator; the parsing done here 1193178354Ssam * is just for internal use in making operational decisions. 1194178354Ssam */ 1195178354Ssamstatic int 1196178354Ssamieee80211_parse_wpa(struct ieee80211vap *vap, const uint8_t *frm, 1197178354Ssam struct ieee80211_rsnparms *rsn, const struct ieee80211_frame *wh) 1198178354Ssam{ 1199178354Ssam uint8_t len = frm[1]; 1200178354Ssam uint32_t w; 1201178354Ssam int n; 1202178354Ssam 1203178354Ssam /* 1204178354Ssam * Check the length once for fixed parts: OUI, type, 1205178354Ssam * version, mcast cipher, and 2 selector counts. 1206178354Ssam * Other, variable-length data, must be checked separately. 1207178354Ssam */ 1208178354Ssam if ((vap->iv_flags & IEEE80211_F_WPA1) == 0) { 1209178354Ssam IEEE80211_DISCARD_IE(vap, 1210178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1211178354Ssam wh, "WPA", "not WPA, flags 0x%x", vap->iv_flags); 1212178354Ssam return IEEE80211_REASON_IE_INVALID; 1213178354Ssam } 1214178354Ssam if (len < 14) { 1215178354Ssam IEEE80211_DISCARD_IE(vap, 1216178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1217178354Ssam wh, "WPA", "too short, len %u", len); 1218178354Ssam return IEEE80211_REASON_IE_INVALID; 1219178354Ssam } 1220178354Ssam frm += 6, len -= 4; /* NB: len is payload only */ 1221178354Ssam /* NB: iswapoui already validated the OUI and type */ 1222178354Ssam w = LE_READ_2(frm); 1223178354Ssam if (w != WPA_VERSION) { 1224178354Ssam IEEE80211_DISCARD_IE(vap, 1225178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1226178354Ssam wh, "WPA", "bad version %u", w); 1227178354Ssam return IEEE80211_REASON_IE_INVALID; 1228178354Ssam } 1229178354Ssam frm += 2, len -= 2; 1230178354Ssam 1231178354Ssam memset(rsn, 0, sizeof(*rsn)); 1232178354Ssam 1233178354Ssam /* multicast/group cipher */ 1234178354Ssam rsn->rsn_mcastcipher = wpa_cipher(frm, &rsn->rsn_mcastkeylen); 1235178354Ssam frm += 4, len -= 4; 1236178354Ssam 1237178354Ssam /* unicast ciphers */ 1238178354Ssam n = LE_READ_2(frm); 1239178354Ssam frm += 2, len -= 2; 1240178354Ssam if (len < n*4+2) { 1241178354Ssam IEEE80211_DISCARD_IE(vap, 1242178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1243178354Ssam wh, "WPA", "ucast cipher data too short; len %u, n %u", 1244178354Ssam len, n); 1245178354Ssam return IEEE80211_REASON_IE_INVALID; 1246178354Ssam } 1247178354Ssam w = 0; 1248178354Ssam for (; n > 0; n--) { 1249178354Ssam w |= 1<<wpa_cipher(frm, &rsn->rsn_ucastkeylen); 1250178354Ssam frm += 4, len -= 4; 1251178354Ssam } 1252178354Ssam if (w & (1<<IEEE80211_CIPHER_TKIP)) 1253178354Ssam rsn->rsn_ucastcipher = IEEE80211_CIPHER_TKIP; 1254178354Ssam else 1255178354Ssam rsn->rsn_ucastcipher = IEEE80211_CIPHER_AES_CCM; 1256178354Ssam 1257178354Ssam /* key management algorithms */ 1258178354Ssam n = LE_READ_2(frm); 1259178354Ssam frm += 2, len -= 2; 1260178354Ssam if (len < n*4) { 1261178354Ssam IEEE80211_DISCARD_IE(vap, 1262178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1263178354Ssam wh, "WPA", "key mgmt alg data too short; len %u, n %u", 1264178354Ssam len, n); 1265178354Ssam return IEEE80211_REASON_IE_INVALID; 1266178354Ssam } 1267178354Ssam w = 0; 1268178354Ssam for (; n > 0; n--) { 1269178354Ssam w |= wpa_keymgmt(frm); 1270178354Ssam frm += 4, len -= 4; 1271178354Ssam } 1272178354Ssam if (w & WPA_ASE_8021X_UNSPEC) 1273178354Ssam rsn->rsn_keymgmt = WPA_ASE_8021X_UNSPEC; 1274178354Ssam else 1275178354Ssam rsn->rsn_keymgmt = WPA_ASE_8021X_PSK; 1276178354Ssam 1277178354Ssam if (len > 2) /* optional capabilities */ 1278178354Ssam rsn->rsn_caps = LE_READ_2(frm); 1279178354Ssam 1280178354Ssam return 0; 1281178354Ssam} 1282178354Ssam 1283178354Ssam/* 1284178354Ssam * Convert an RSN cipher selector OUI to an internal 1285178354Ssam * cipher algorithm. Where appropriate we also 1286178354Ssam * record any key length. 1287178354Ssam */ 1288178354Ssamstatic int 1289178354Ssamrsn_cipher(const uint8_t *sel, uint8_t *keylen) 1290178354Ssam{ 1291178354Ssam#define RSN_SEL(x) (((x)<<24)|RSN_OUI) 1292178354Ssam uint32_t w = LE_READ_4(sel); 1293178354Ssam 1294178354Ssam switch (w) { 1295178354Ssam case RSN_SEL(RSN_CSE_NULL): 1296178354Ssam return IEEE80211_CIPHER_NONE; 1297178354Ssam case RSN_SEL(RSN_CSE_WEP40): 1298178354Ssam if (keylen) 1299178354Ssam *keylen = 40 / NBBY; 1300178354Ssam return IEEE80211_CIPHER_WEP; 1301178354Ssam case RSN_SEL(RSN_CSE_WEP104): 1302178354Ssam if (keylen) 1303178354Ssam *keylen = 104 / NBBY; 1304178354Ssam return IEEE80211_CIPHER_WEP; 1305178354Ssam case RSN_SEL(RSN_CSE_TKIP): 1306178354Ssam return IEEE80211_CIPHER_TKIP; 1307178354Ssam case RSN_SEL(RSN_CSE_CCMP): 1308178354Ssam return IEEE80211_CIPHER_AES_CCM; 1309178354Ssam case RSN_SEL(RSN_CSE_WRAP): 1310178354Ssam return IEEE80211_CIPHER_AES_OCB; 1311178354Ssam } 1312178354Ssam return 32; /* NB: so 1<< is discarded */ 1313178354Ssam#undef WPA_SEL 1314178354Ssam} 1315178354Ssam 1316178354Ssam/* 1317178354Ssam * Convert an RSN key management/authentication algorithm 1318178354Ssam * to an internal code. 1319178354Ssam */ 1320178354Ssamstatic int 1321178354Ssamrsn_keymgmt(const uint8_t *sel) 1322178354Ssam{ 1323178354Ssam#define RSN_SEL(x) (((x)<<24)|RSN_OUI) 1324178354Ssam uint32_t w = LE_READ_4(sel); 1325178354Ssam 1326178354Ssam switch (w) { 1327178354Ssam case RSN_SEL(RSN_ASE_8021X_UNSPEC): 1328178354Ssam return RSN_ASE_8021X_UNSPEC; 1329178354Ssam case RSN_SEL(RSN_ASE_8021X_PSK): 1330178354Ssam return RSN_ASE_8021X_PSK; 1331178354Ssam case RSN_SEL(RSN_ASE_NONE): 1332178354Ssam return RSN_ASE_NONE; 1333178354Ssam } 1334178354Ssam return 0; /* NB: so is discarded */ 1335178354Ssam#undef RSN_SEL 1336178354Ssam} 1337178354Ssam 1338178354Ssam/* 1339178354Ssam * Parse a WPA/RSN information element to collect parameters 1340178354Ssam * and validate the parameters against what has been 1341178354Ssam * configured for the system. 1342178354Ssam */ 1343178354Ssamstatic int 1344178354Ssamieee80211_parse_rsn(struct ieee80211vap *vap, const uint8_t *frm, 1345178354Ssam struct ieee80211_rsnparms *rsn, const struct ieee80211_frame *wh) 1346178354Ssam{ 1347178354Ssam uint8_t len = frm[1]; 1348178354Ssam uint32_t w; 1349178354Ssam int n; 1350178354Ssam 1351178354Ssam /* 1352178354Ssam * Check the length once for fixed parts: 1353178354Ssam * version, mcast cipher, and 2 selector counts. 1354178354Ssam * Other, variable-length data, must be checked separately. 1355178354Ssam */ 1356178354Ssam if ((vap->iv_flags & IEEE80211_F_WPA2) == 0) { 1357178354Ssam IEEE80211_DISCARD_IE(vap, 1358178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1359178354Ssam wh, "WPA", "not RSN, flags 0x%x", vap->iv_flags); 1360178354Ssam return IEEE80211_REASON_IE_INVALID; 1361178354Ssam } 1362178354Ssam if (len < 10) { 1363178354Ssam IEEE80211_DISCARD_IE(vap, 1364178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1365178354Ssam wh, "RSN", "too short, len %u", len); 1366178354Ssam return IEEE80211_REASON_IE_INVALID; 1367178354Ssam } 1368178354Ssam frm += 2; 1369178354Ssam w = LE_READ_2(frm); 1370178354Ssam if (w != RSN_VERSION) { 1371178354Ssam IEEE80211_DISCARD_IE(vap, 1372178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1373178354Ssam wh, "RSN", "bad version %u", w); 1374178354Ssam return IEEE80211_REASON_IE_INVALID; 1375178354Ssam } 1376178354Ssam frm += 2, len -= 2; 1377178354Ssam 1378178354Ssam memset(rsn, 0, sizeof(*rsn)); 1379178354Ssam 1380178354Ssam /* multicast/group cipher */ 1381178354Ssam rsn->rsn_mcastcipher = rsn_cipher(frm, &rsn->rsn_mcastkeylen); 1382178354Ssam frm += 4, len -= 4; 1383178354Ssam 1384178354Ssam /* unicast ciphers */ 1385178354Ssam n = LE_READ_2(frm); 1386178354Ssam frm += 2, len -= 2; 1387178354Ssam if (len < n*4+2) { 1388178354Ssam IEEE80211_DISCARD_IE(vap, 1389178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1390178354Ssam wh, "RSN", "ucast cipher data too short; len %u, n %u", 1391178354Ssam len, n); 1392178354Ssam return IEEE80211_REASON_IE_INVALID; 1393178354Ssam } 1394178354Ssam w = 0; 1395178354Ssam for (; n > 0; n--) { 1396178354Ssam w |= 1<<rsn_cipher(frm, &rsn->rsn_ucastkeylen); 1397178354Ssam frm += 4, len -= 4; 1398178354Ssam } 1399178354Ssam if (w & (1<<IEEE80211_CIPHER_TKIP)) 1400178354Ssam rsn->rsn_ucastcipher = IEEE80211_CIPHER_TKIP; 1401178354Ssam else 1402178354Ssam rsn->rsn_ucastcipher = IEEE80211_CIPHER_AES_CCM; 1403178354Ssam 1404178354Ssam /* key management algorithms */ 1405178354Ssam n = LE_READ_2(frm); 1406178354Ssam frm += 2, len -= 2; 1407178354Ssam if (len < n*4) { 1408178354Ssam IEEE80211_DISCARD_IE(vap, 1409178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1410178354Ssam wh, "RSN", "key mgmt alg data too short; len %u, n %u", 1411178354Ssam len, n); 1412178354Ssam return IEEE80211_REASON_IE_INVALID; 1413178354Ssam } 1414178354Ssam w = 0; 1415178354Ssam for (; n > 0; n--) { 1416178354Ssam w |= rsn_keymgmt(frm); 1417178354Ssam frm += 4, len -= 4; 1418178354Ssam } 1419178354Ssam if (w & RSN_ASE_8021X_UNSPEC) 1420178354Ssam rsn->rsn_keymgmt = RSN_ASE_8021X_UNSPEC; 1421178354Ssam else 1422178354Ssam rsn->rsn_keymgmt = RSN_ASE_8021X_PSK; 1423178354Ssam 1424178354Ssam /* optional RSN capabilities */ 1425178354Ssam if (len > 2) 1426178354Ssam rsn->rsn_caps = LE_READ_2(frm); 1427178354Ssam /* XXXPMKID */ 1428178354Ssam 1429178354Ssam return 0; 1430178354Ssam} 1431178354Ssam 1432178354Ssam/* 1433178354Ssam * WPA/802.11i assocation request processing. 1434178354Ssam */ 1435178354Ssamstatic int 1436178354Ssamwpa_assocreq(struct ieee80211_node *ni, struct ieee80211_rsnparms *rsnparms, 1437178354Ssam const struct ieee80211_frame *wh, const uint8_t *wpa, 1438178354Ssam const uint8_t *rsn, uint16_t capinfo) 1439178354Ssam{ 1440178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1441178354Ssam uint8_t reason; 1442178354Ssam int badwparsn; 1443178354Ssam 1444178354Ssam ni->ni_flags &= ~(IEEE80211_NODE_WPS|IEEE80211_NODE_TSN); 1445178354Ssam if (wpa == NULL && rsn == NULL) { 1446178354Ssam if (vap->iv_flags_ext & IEEE80211_FEXT_WPS) { 1447178354Ssam /* 1448178354Ssam * W-Fi Protected Setup (WPS) permits 1449178354Ssam * clients to associate and pass EAPOL frames 1450178354Ssam * to establish initial credentials. 1451178354Ssam */ 1452178354Ssam ni->ni_flags |= IEEE80211_NODE_WPS; 1453178354Ssam return 1; 1454178354Ssam } 1455178354Ssam if ((vap->iv_flags_ext & IEEE80211_FEXT_TSN) && 1456178354Ssam (capinfo & IEEE80211_CAPINFO_PRIVACY)) { 1457178354Ssam /* 1458178354Ssam * Transitional Security Network. Permits clients 1459178354Ssam * to associate and use WEP while WPA is configured. 1460178354Ssam */ 1461178354Ssam ni->ni_flags |= IEEE80211_NODE_TSN; 1462178354Ssam return 1; 1463178354Ssam } 1464178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA, 1465178354Ssam wh, NULL, "%s", "no WPA/RSN IE in association request"); 1466178354Ssam vap->iv_stats.is_rx_assoc_badwpaie++; 1467178354Ssam reason = IEEE80211_REASON_IE_INVALID; 1468178354Ssam goto bad; 1469178354Ssam } 1470178354Ssam /* assert right association security credentials */ 1471178354Ssam badwparsn = 0; /* NB: to silence compiler */ 1472178354Ssam switch (vap->iv_flags & IEEE80211_F_WPA) { 1473178354Ssam case IEEE80211_F_WPA1: 1474178354Ssam badwparsn = (wpa == NULL); 1475178354Ssam break; 1476178354Ssam case IEEE80211_F_WPA2: 1477178354Ssam badwparsn = (rsn == NULL); 1478178354Ssam break; 1479178354Ssam case IEEE80211_F_WPA1|IEEE80211_F_WPA2: 1480178354Ssam badwparsn = (wpa == NULL && rsn == NULL); 1481178354Ssam break; 1482178354Ssam } 1483178354Ssam if (badwparsn) { 1484178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA, 1485178354Ssam wh, NULL, 1486178354Ssam "%s", "missing WPA/RSN IE in association request"); 1487178354Ssam vap->iv_stats.is_rx_assoc_badwpaie++; 1488178354Ssam reason = IEEE80211_REASON_IE_INVALID; 1489178354Ssam goto bad; 1490178354Ssam } 1491178354Ssam /* 1492178354Ssam * Parse WPA/RSN information element. 1493178354Ssam */ 1494178354Ssam if (wpa != NULL) 1495178354Ssam reason = ieee80211_parse_wpa(vap, wpa, rsnparms, wh); 1496178354Ssam else 1497178354Ssam reason = ieee80211_parse_rsn(vap, rsn, rsnparms, wh); 1498178354Ssam if (reason != 0) { 1499178354Ssam /* XXX distinguish WPA/RSN? */ 1500178354Ssam vap->iv_stats.is_rx_assoc_badwpaie++; 1501178354Ssam goto bad; 1502178354Ssam } 1503178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA, ni, 1504178354Ssam "%s ie: mc %u/%u uc %u/%u key %u caps 0x%x", 1505178354Ssam wpa != NULL ? "WPA" : "RSN", 1506178354Ssam rsnparms->rsn_mcastcipher, rsnparms->rsn_mcastkeylen, 1507178354Ssam rsnparms->rsn_ucastcipher, rsnparms->rsn_ucastkeylen, 1508178354Ssam rsnparms->rsn_keymgmt, rsnparms->rsn_caps); 1509178354Ssam 1510178354Ssam return 1; 1511178354Ssambad: 1512178354Ssam ieee80211_node_deauth(ni, reason); 1513178354Ssam return 0; 1514178354Ssam} 1515178354Ssam 1516178354Ssam/* XXX find a better place for definition */ 1517178354Ssamstruct l2_update_frame { 1518178354Ssam struct ether_header eh; 1519178354Ssam uint8_t dsap; 1520178354Ssam uint8_t ssap; 1521178354Ssam uint8_t control; 1522178354Ssam uint8_t xid[3]; 1523178354Ssam} __packed; 1524178354Ssam 1525178354Ssam/* 1526178354Ssam * Deliver a TGf L2UF frame on behalf of a station. 1527178354Ssam * This primes any bridge when the station is roaming 1528178354Ssam * between ap's on the same wired network. 1529178354Ssam */ 1530178354Ssamstatic void 1531178354Ssamieee80211_deliver_l2uf(struct ieee80211_node *ni) 1532178354Ssam{ 1533178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1534178354Ssam struct ifnet *ifp = vap->iv_ifp; 1535178354Ssam struct mbuf *m; 1536178354Ssam struct l2_update_frame *l2uf; 1537178354Ssam struct ether_header *eh; 1538178354Ssam 1539178354Ssam m = m_gethdr(M_NOWAIT, MT_DATA); 1540178354Ssam if (m == NULL) { 1541178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 1542178354Ssam "%s", "no mbuf for l2uf frame"); 1543178354Ssam vap->iv_stats.is_rx_nobuf++; /* XXX not right */ 1544178354Ssam return; 1545178354Ssam } 1546178354Ssam l2uf = mtod(m, struct l2_update_frame *); 1547178354Ssam eh = &l2uf->eh; 1548178354Ssam /* dst: Broadcast address */ 1549178354Ssam IEEE80211_ADDR_COPY(eh->ether_dhost, ifp->if_broadcastaddr); 1550178354Ssam /* src: associated STA */ 1551178354Ssam IEEE80211_ADDR_COPY(eh->ether_shost, ni->ni_macaddr); 1552178354Ssam eh->ether_type = htons(sizeof(*l2uf) - sizeof(*eh)); 1553178354Ssam 1554178354Ssam l2uf->dsap = 0; 1555178354Ssam l2uf->ssap = 0; 1556178354Ssam l2uf->control = 0xf5; 1557178354Ssam l2uf->xid[0] = 0x81; 1558178354Ssam l2uf->xid[1] = 0x80; 1559178354Ssam l2uf->xid[2] = 0x00; 1560178354Ssam 1561178354Ssam m->m_pkthdr.len = m->m_len = sizeof(*l2uf); 1562178354Ssam hostap_deliver_data(vap, ni, m); 1563178354Ssam} 1564178354Ssam 1565178354Ssamstatic void 1566178354Ssamratesetmismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh, 1567178354Ssam int reassoc, int resp, const char *tag, int rate) 1568178354Ssam{ 1569178354Ssam IEEE80211_NOTE_MAC(ni->ni_vap, IEEE80211_MSG_ANY, wh->i_addr2, 1570178354Ssam "deny %s request, %s rate set mismatch, rate/MCS %d", 1571178354Ssam reassoc ? "reassoc" : "assoc", tag, rate & IEEE80211_RATE_VAL); 1572178354Ssam IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_BASIC_RATE); 1573178354Ssam ieee80211_node_leave(ni); 1574178354Ssam} 1575178354Ssam 1576178354Ssamstatic void 1577178354Ssamcapinfomismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh, 1578178354Ssam int reassoc, int resp, const char *tag, int capinfo) 1579178354Ssam{ 1580178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1581178354Ssam 1582178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ANY, wh->i_addr2, 1583178354Ssam "deny %s request, %s mismatch 0x%x", 1584178354Ssam reassoc ? "reassoc" : "assoc", tag, capinfo); 1585178354Ssam IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_CAPINFO); 1586178354Ssam ieee80211_node_leave(ni); 1587178354Ssam vap->iv_stats.is_rx_assoc_capmismatch++; 1588178354Ssam} 1589178354Ssam 1590178354Ssamstatic void 1591178354Ssamhtcapmismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh, 1592178354Ssam int reassoc, int resp) 1593178354Ssam{ 1594178354Ssam IEEE80211_NOTE_MAC(ni->ni_vap, IEEE80211_MSG_ANY, wh->i_addr2, 1595178354Ssam "deny %s request, %s missing HT ie", reassoc ? "reassoc" : "assoc"); 1596178354Ssam /* XXX no better code */ 1597178354Ssam IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_OTHER); 1598178354Ssam ieee80211_node_leave(ni); 1599178354Ssam} 1600178354Ssam 1601178354Ssamstatic void 1602178354Ssamauthalgreject(struct ieee80211_node *ni, const struct ieee80211_frame *wh, 1603178354Ssam int algo, int seq, int status) 1604178354Ssam{ 1605178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1606178354Ssam 1607178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1608178354Ssam wh, NULL, "unsupported alg %d", algo); 1609178354Ssam vap->iv_stats.is_rx_auth_unsupported++; 1610178354Ssam ieee80211_send_error(ni, wh->i_addr2, IEEE80211_FC0_SUBTYPE_AUTH, 1611178354Ssam seq | (status << 16)); 1612178354Ssam} 1613178354Ssam 1614178354Ssamstatic __inline int 1615178354Ssamishtmixed(const uint8_t *ie) 1616178354Ssam{ 1617178354Ssam const struct ieee80211_ie_htinfo *ht = 1618178354Ssam (const struct ieee80211_ie_htinfo *) ie; 1619178354Ssam return (ht->hi_byte2 & IEEE80211_HTINFO_OPMODE) == 1620178354Ssam IEEE80211_HTINFO_OPMODE_MIXED; 1621178354Ssam} 1622178354Ssam 1623178354Ssamstatic int 1624178354Ssamis11bclient(const uint8_t *rates, const uint8_t *xrates) 1625178354Ssam{ 1626178354Ssam static const uint32_t brates = (1<<2*1)|(1<<2*2)|(1<<11)|(1<<2*11); 1627178354Ssam int i; 1628178354Ssam 1629178354Ssam /* NB: the 11b clients we care about will not have xrates */ 1630178354Ssam if (xrates != NULL || rates == NULL) 1631178354Ssam return 0; 1632178354Ssam for (i = 0; i < rates[1]; i++) { 1633178354Ssam int r = rates[2+i] & IEEE80211_RATE_VAL; 1634178354Ssam if (r > 2*11 || ((1<<r) & brates) == 0) 1635178354Ssam return 0; 1636178354Ssam } 1637178354Ssam return 1; 1638178354Ssam} 1639178354Ssam 1640178354Ssamstatic void 1641178354Ssamhostap_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, 1642192468Ssam int subtype, int rssi, int nf) 1643178354Ssam{ 1644178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1645178354Ssam struct ieee80211com *ic = ni->ni_ic; 1646178354Ssam struct ieee80211_frame *wh; 1647178354Ssam uint8_t *frm, *efrm, *sfrm; 1648178354Ssam uint8_t *ssid, *rates, *xrates, *wpa, *rsn, *wme, *ath, *htcap; 1649178354Ssam int reassoc, resp; 1650178354Ssam uint8_t rate; 1651178354Ssam 1652178354Ssam wh = mtod(m0, struct ieee80211_frame *); 1653178354Ssam frm = (uint8_t *)&wh[1]; 1654178354Ssam efrm = mtod(m0, uint8_t *) + m0->m_len; 1655178354Ssam switch (subtype) { 1656178354Ssam case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1657178354Ssam case IEEE80211_FC0_SUBTYPE_BEACON: { 1658178354Ssam struct ieee80211_scanparams scan; 1659178354Ssam /* 1660178354Ssam * We process beacon/probe response frames when scanning; 1661178354Ssam * otherwise we check beacon frames for overlapping non-ERP 1662178354Ssam * BSS in 11g and/or overlapping legacy BSS when in HT. 1663178354Ssam */ 1664178354Ssam if ((ic->ic_flags & IEEE80211_F_SCAN) == 0 && 1665178354Ssam subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP) { 1666178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1667178354Ssam return; 1668178354Ssam } 1669178354Ssam /* NB: accept off-channel frames */ 1670178354Ssam if (ieee80211_parse_beacon(ni, m0, &scan) &~ IEEE80211_BPARSE_OFFCHAN) 1671178354Ssam return; 1672178354Ssam /* 1673178354Ssam * Count frame now that we know it's to be processed. 1674178354Ssam */ 1675178354Ssam if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1676178354Ssam vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1677178354Ssam IEEE80211_NODE_STAT(ni, rx_beacons); 1678178354Ssam } else 1679178354Ssam IEEE80211_NODE_STAT(ni, rx_proberesp); 1680178354Ssam /* 1681178354Ssam * If scanning, just pass information to the scan module. 1682178354Ssam */ 1683178354Ssam if (ic->ic_flags & IEEE80211_F_SCAN) { 1684178354Ssam if (scan.status == 0 && /* NB: on channel */ 1685178354Ssam (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN)) { 1686178354Ssam /* 1687178354Ssam * Actively scanning a channel marked passive; 1688178354Ssam * send a probe request now that we know there 1689178354Ssam * is 802.11 traffic present. 1690178354Ssam * 1691178354Ssam * XXX check if the beacon we recv'd gives 1692178354Ssam * us what we need and suppress the probe req 1693178354Ssam */ 1694178354Ssam ieee80211_probe_curchan(vap, 1); 1695178354Ssam ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 1696178354Ssam } 1697192468Ssam ieee80211_add_scan(vap, &scan, wh, subtype, rssi, nf); 1698178354Ssam return; 1699178354Ssam } 1700178354Ssam /* 1701178354Ssam * Check beacon for overlapping bss w/ non ERP stations. 1702178354Ssam * If we detect one and protection is configured but not 1703178354Ssam * enabled, enable it and start a timer that'll bring us 1704178354Ssam * out if we stop seeing the bss. 1705178354Ssam */ 1706178354Ssam if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 1707178354Ssam scan.status == 0 && /* NB: on-channel */ 1708178354Ssam ((scan.erp & 0x100) == 0 || /* NB: no ERP, 11b sta*/ 1709178354Ssam (scan.erp & IEEE80211_ERP_NON_ERP_PRESENT))) { 1710178354Ssam ic->ic_lastnonerp = ticks; 1711178354Ssam ic->ic_flags_ext |= IEEE80211_FEXT_NONERP_PR; 1712178354Ssam if (ic->ic_protmode != IEEE80211_PROT_NONE && 1713178354Ssam (ic->ic_flags & IEEE80211_F_USEPROT) == 0) { 1714178354Ssam IEEE80211_NOTE_FRAME(vap, 1715178354Ssam IEEE80211_MSG_ASSOC, wh, 1716178354Ssam "non-ERP present on channel %d " 1717178354Ssam "(saw erp 0x%x from channel %d), " 1718178354Ssam "enable use of protection", 1719178354Ssam ic->ic_curchan->ic_ieee, 1720178354Ssam scan.erp, scan.chan); 1721178354Ssam ic->ic_flags |= IEEE80211_F_USEPROT; 1722178354Ssam ieee80211_notify_erp(ic); 1723178354Ssam } 1724178354Ssam } 1725178354Ssam /* 1726178354Ssam * Check beacon for non-HT station on HT channel 1727178354Ssam * and update HT BSS occupancy as appropriate. 1728178354Ssam */ 1729178354Ssam if (IEEE80211_IS_CHAN_HT(ic->ic_curchan)) { 1730178354Ssam if (scan.status & IEEE80211_BPARSE_OFFCHAN) { 1731178354Ssam /* 1732178354Ssam * Off control channel; only check frames 1733178354Ssam * that come in the extension channel when 1734178354Ssam * operating w/ HT40. 1735178354Ssam */ 1736178354Ssam if (!IEEE80211_IS_CHAN_HT40(ic->ic_curchan)) 1737178354Ssam break; 1738178354Ssam if (scan.chan != ic->ic_curchan->ic_extieee) 1739178354Ssam break; 1740178354Ssam } 1741178354Ssam if (scan.htinfo == NULL) { 1742178354Ssam ieee80211_htprot_update(ic, 1743178354Ssam IEEE80211_HTINFO_OPMODE_PROTOPT | 1744178354Ssam IEEE80211_HTINFO_NONHT_PRESENT); 1745178354Ssam } else if (ishtmixed(scan.htinfo)) { 1746178354Ssam /* XXX? take NONHT_PRESENT from beacon? */ 1747178354Ssam ieee80211_htprot_update(ic, 1748178354Ssam IEEE80211_HTINFO_OPMODE_MIXED | 1749178354Ssam IEEE80211_HTINFO_NONHT_PRESENT); 1750178354Ssam } 1751178354Ssam } 1752178354Ssam break; 1753178354Ssam } 1754178354Ssam 1755178354Ssam case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 1756178354Ssam if (vap->iv_state != IEEE80211_S_RUN) { 1757178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1758178354Ssam return; 1759178354Ssam } 1760178354Ssam /* 1761178354Ssam * prreq frame format 1762178354Ssam * [tlv] ssid 1763178354Ssam * [tlv] supported rates 1764178354Ssam * [tlv] extended supported rates 1765178354Ssam */ 1766178354Ssam ssid = rates = xrates = NULL; 1767178354Ssam sfrm = frm; 1768178354Ssam while (efrm - frm > 1) { 1769178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 1770178354Ssam switch (*frm) { 1771178354Ssam case IEEE80211_ELEMID_SSID: 1772178354Ssam ssid = frm; 1773178354Ssam break; 1774178354Ssam case IEEE80211_ELEMID_RATES: 1775178354Ssam rates = frm; 1776178354Ssam break; 1777178354Ssam case IEEE80211_ELEMID_XRATES: 1778178354Ssam xrates = frm; 1779178354Ssam break; 1780178354Ssam } 1781178354Ssam frm += frm[1] + 2; 1782178354Ssam } 1783178354Ssam IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 1784178354Ssam if (xrates != NULL) 1785178354Ssam IEEE80211_VERIFY_ELEMENT(xrates, 1786178354Ssam IEEE80211_RATE_MAXSIZE - rates[1], return); 1787178354Ssam IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); 1788178354Ssam IEEE80211_VERIFY_SSID(vap->iv_bss, ssid, return); 1789178354Ssam if ((vap->iv_flags & IEEE80211_F_HIDESSID) && ssid[1] == 0) { 1790178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1791178354Ssam wh, NULL, 1792178354Ssam "%s", "no ssid with ssid suppression enabled"); 1793178354Ssam vap->iv_stats.is_rx_ssidmismatch++; /*XXX*/ 1794178354Ssam return; 1795178354Ssam } 1796178354Ssam 1797178354Ssam /* XXX find a better class or define it's own */ 1798178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2, 1799178354Ssam "%s", "recv probe req"); 1800178354Ssam /* 1801178354Ssam * Some legacy 11b clients cannot hack a complete 1802178354Ssam * probe response frame. When the request includes 1803178354Ssam * only a bare-bones rate set, communicate this to 1804178354Ssam * the transmit side. 1805178354Ssam */ 1806178354Ssam ieee80211_send_proberesp(vap, wh->i_addr2, 1807178354Ssam is11bclient(rates, xrates) ? IEEE80211_SEND_LEGACY_11B : 0); 1808178354Ssam break; 1809178354Ssam 1810178354Ssam case IEEE80211_FC0_SUBTYPE_AUTH: { 1811178354Ssam uint16_t algo, seq, status; 1812178354Ssam 1813178354Ssam if (vap->iv_state != IEEE80211_S_RUN) { 1814178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1815178354Ssam return; 1816178354Ssam } 1817178354Ssam if (!IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_bss->ni_bssid)) { 1818178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1819178354Ssam wh, NULL, "%s", "wrong bssid"); 1820178354Ssam vap->iv_stats.is_rx_wrongbss++; /*XXX unique stat?*/ 1821178354Ssam return; 1822178354Ssam } 1823178354Ssam /* 1824178354Ssam * auth frame format 1825178354Ssam * [2] algorithm 1826178354Ssam * [2] sequence 1827178354Ssam * [2] status 1828178354Ssam * [tlv*] challenge 1829178354Ssam */ 1830178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return); 1831178354Ssam algo = le16toh(*(uint16_t *)frm); 1832178354Ssam seq = le16toh(*(uint16_t *)(frm + 2)); 1833178354Ssam status = le16toh(*(uint16_t *)(frm + 4)); 1834178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr2, 1835178354Ssam "recv auth frame with algorithm %d seq %d", algo, seq); 1836178354Ssam /* 1837178354Ssam * Consult the ACL policy module if setup. 1838178354Ssam */ 1839178354Ssam if (vap->iv_acl != NULL && 1840178354Ssam !vap->iv_acl->iac_check(vap, wh->i_addr2)) { 1841178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1842178354Ssam wh, NULL, "%s", "disallowed by ACL"); 1843178354Ssam vap->iv_stats.is_rx_acl++; 1844178354Ssam ieee80211_send_error(ni, wh->i_addr2, 1845178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 1846178354Ssam (seq+1) | (IEEE80211_STATUS_UNSPECIFIED<<16)); 1847178354Ssam return; 1848178354Ssam } 1849178354Ssam if (vap->iv_flags & IEEE80211_F_COUNTERM) { 1850178354Ssam IEEE80211_DISCARD(vap, 1851178354Ssam IEEE80211_MSG_AUTH | IEEE80211_MSG_CRYPTO, 1852178354Ssam wh, NULL, "%s", "TKIP countermeasures enabled"); 1853178354Ssam vap->iv_stats.is_rx_auth_countermeasures++; 1854178354Ssam ieee80211_send_error(ni, wh->i_addr2, 1855178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 1856178354Ssam IEEE80211_REASON_MIC_FAILURE); 1857178354Ssam return; 1858178354Ssam } 1859178354Ssam if (algo == IEEE80211_AUTH_ALG_SHARED) 1860192468Ssam hostap_auth_shared(ni, wh, frm + 6, efrm, rssi, nf, 1861192468Ssam seq, status); 1862178354Ssam else if (algo == IEEE80211_AUTH_ALG_OPEN) 1863192468Ssam hostap_auth_open(ni, wh, rssi, nf, seq, status); 1864178354Ssam else if (algo == IEEE80211_AUTH_ALG_LEAP) { 1865178354Ssam authalgreject(ni, wh, algo, 1866178354Ssam seq+1, IEEE80211_STATUS_ALG); 1867178354Ssam return; 1868178354Ssam } else { 1869178354Ssam /* 1870178354Ssam * We assume that an unknown algorithm is the result 1871178354Ssam * of a decryption failure on a shared key auth frame; 1872178354Ssam * return a status code appropriate for that instead 1873178354Ssam * of IEEE80211_STATUS_ALG. 1874178354Ssam * 1875178354Ssam * NB: a seq# of 4 is intentional; the decrypted 1876178354Ssam * frame likely has a bogus seq value. 1877178354Ssam */ 1878178354Ssam authalgreject(ni, wh, algo, 1879178354Ssam 4, IEEE80211_STATUS_CHALLENGE); 1880178354Ssam return; 1881178354Ssam } 1882178354Ssam break; 1883178354Ssam } 1884178354Ssam 1885178354Ssam case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 1886178354Ssam case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: { 1887178354Ssam uint16_t capinfo, lintval; 1888178354Ssam struct ieee80211_rsnparms rsnparms; 1889178354Ssam 1890178354Ssam if (vap->iv_state != IEEE80211_S_RUN) { 1891178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1892178354Ssam return; 1893178354Ssam } 1894178354Ssam if (!IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_bss->ni_bssid)) { 1895178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1896178354Ssam wh, NULL, "%s", "wrong bssid"); 1897178354Ssam vap->iv_stats.is_rx_assoc_bss++; 1898178354Ssam return; 1899178354Ssam } 1900178354Ssam if (subtype == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) { 1901178354Ssam reassoc = 1; 1902178354Ssam resp = IEEE80211_FC0_SUBTYPE_REASSOC_RESP; 1903178354Ssam } else { 1904178354Ssam reassoc = 0; 1905178354Ssam resp = IEEE80211_FC0_SUBTYPE_ASSOC_RESP; 1906178354Ssam } 1907178354Ssam if (ni == vap->iv_bss) { 1908178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ANY, wh->i_addr2, 1909178354Ssam "deny %s request, sta not authenticated", 1910178354Ssam reassoc ? "reassoc" : "assoc"); 1911178354Ssam ieee80211_send_error(ni, wh->i_addr2, 1912178354Ssam IEEE80211_FC0_SUBTYPE_DEAUTH, 1913178354Ssam IEEE80211_REASON_ASSOC_NOT_AUTHED); 1914178354Ssam vap->iv_stats.is_rx_assoc_notauth++; 1915178354Ssam return; 1916178354Ssam } 1917178354Ssam 1918178354Ssam /* 1919178354Ssam * asreq frame format 1920178354Ssam * [2] capability information 1921178354Ssam * [2] listen interval 1922178354Ssam * [6*] current AP address (reassoc only) 1923178354Ssam * [tlv] ssid 1924178354Ssam * [tlv] supported rates 1925178354Ssam * [tlv] extended supported rates 1926178354Ssam * [tlv] WPA or RSN 1927178354Ssam * [tlv] HT capabilities 1928178354Ssam * [tlv] Atheros capabilities 1929178354Ssam */ 1930178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, (reassoc ? 10 : 4), return); 1931178354Ssam capinfo = le16toh(*(uint16_t *)frm); frm += 2; 1932178354Ssam lintval = le16toh(*(uint16_t *)frm); frm += 2; 1933178354Ssam if (reassoc) 1934178354Ssam frm += 6; /* ignore current AP info */ 1935178354Ssam ssid = rates = xrates = wpa = rsn = wme = ath = htcap = NULL; 1936178354Ssam sfrm = frm; 1937178354Ssam while (efrm - frm > 1) { 1938178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 1939178354Ssam switch (*frm) { 1940178354Ssam case IEEE80211_ELEMID_SSID: 1941178354Ssam ssid = frm; 1942178354Ssam break; 1943178354Ssam case IEEE80211_ELEMID_RATES: 1944178354Ssam rates = frm; 1945178354Ssam break; 1946178354Ssam case IEEE80211_ELEMID_XRATES: 1947178354Ssam xrates = frm; 1948178354Ssam break; 1949178354Ssam case IEEE80211_ELEMID_RSN: 1950178354Ssam rsn = frm; 1951178354Ssam break; 1952178354Ssam case IEEE80211_ELEMID_HTCAP: 1953178354Ssam htcap = frm; 1954178354Ssam break; 1955178354Ssam case IEEE80211_ELEMID_VENDOR: 1956178354Ssam if (iswpaoui(frm)) 1957178354Ssam wpa = frm; 1958178354Ssam else if (iswmeinfo(frm)) 1959178354Ssam wme = frm; 1960190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 1961178354Ssam else if (isatherosoui(frm)) 1962178354Ssam ath = frm; 1963190391Ssam#endif 1964178354Ssam else if (vap->iv_flags_ext & IEEE80211_FEXT_HTCOMPAT) { 1965178354Ssam if (ishtcapoui(frm) && htcap == NULL) 1966178354Ssam htcap = frm; 1967178354Ssam } 1968178354Ssam break; 1969178354Ssam } 1970178354Ssam frm += frm[1] + 2; 1971178354Ssam } 1972178354Ssam IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 1973178354Ssam if (xrates != NULL) 1974178354Ssam IEEE80211_VERIFY_ELEMENT(xrates, 1975178354Ssam IEEE80211_RATE_MAXSIZE - rates[1], return); 1976178354Ssam IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); 1977178354Ssam IEEE80211_VERIFY_SSID(vap->iv_bss, ssid, return); 1978178354Ssam if (htcap != NULL) { 1979178354Ssam IEEE80211_VERIFY_LENGTH(htcap[1], 1980178354Ssam htcap[0] == IEEE80211_ELEMID_VENDOR ? 1981178354Ssam 4 + sizeof(struct ieee80211_ie_htcap)-2 : 1982178354Ssam sizeof(struct ieee80211_ie_htcap)-2, 1983178354Ssam return); /* XXX just NULL out? */ 1984178354Ssam } 1985178354Ssam 1986178354Ssam if ((vap->iv_flags & IEEE80211_F_WPA) && 1987178354Ssam !wpa_assocreq(ni, &rsnparms, wh, wpa, rsn, capinfo)) 1988178354Ssam return; 1989178354Ssam /* discard challenge after association */ 1990178354Ssam if (ni->ni_challenge != NULL) { 1991186302Ssam free(ni->ni_challenge, M_80211_NODE); 1992178354Ssam ni->ni_challenge = NULL; 1993178354Ssam } 1994178354Ssam /* NB: 802.11 spec says to ignore station's privacy bit */ 1995178354Ssam if ((capinfo & IEEE80211_CAPINFO_ESS) == 0) { 1996178354Ssam capinfomismatch(ni, wh, reassoc, resp, 1997178354Ssam "capability", capinfo); 1998178354Ssam return; 1999178354Ssam } 2000178354Ssam /* 2001178354Ssam * Disallow re-associate w/ invalid slot time setting. 2002178354Ssam */ 2003178354Ssam if (ni->ni_associd != 0 && 2004178354Ssam IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2005178354Ssam ((ni->ni_capinfo ^ capinfo) & IEEE80211_CAPINFO_SHORT_SLOTTIME)) { 2006178354Ssam capinfomismatch(ni, wh, reassoc, resp, 2007178354Ssam "slot time", capinfo); 2008178354Ssam return; 2009178354Ssam } 2010178354Ssam rate = ieee80211_setup_rates(ni, rates, xrates, 2011178354Ssam IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 2012178354Ssam IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 2013178354Ssam if (rate & IEEE80211_RATE_BASIC) { 2014178354Ssam ratesetmismatch(ni, wh, reassoc, resp, "legacy", rate); 2015178354Ssam vap->iv_stats.is_rx_assoc_norate++; 2016178354Ssam return; 2017178354Ssam } 2018178354Ssam /* 2019178354Ssam * If constrained to 11g-only stations reject an 2020178354Ssam * 11b-only station. We cheat a bit here by looking 2021178354Ssam * at the max negotiated xmit rate and assuming anyone 2022178354Ssam * with a best rate <24Mb/s is an 11b station. 2023178354Ssam */ 2024178354Ssam if ((vap->iv_flags & IEEE80211_F_PUREG) && rate < 48) { 2025178354Ssam ratesetmismatch(ni, wh, reassoc, resp, "11g", rate); 2026178354Ssam vap->iv_stats.is_rx_assoc_norate++; 2027178354Ssam return; 2028178354Ssam } 2029178354Ssam /* 2030178354Ssam * Do HT rate set handling and setup HT node state. 2031178354Ssam */ 2032178354Ssam ni->ni_chan = vap->iv_bss->ni_chan; 2033178354Ssam if (IEEE80211_IS_CHAN_HT(ni->ni_chan) && htcap != NULL) { 2034178354Ssam rate = ieee80211_setup_htrates(ni, htcap, 2035178354Ssam IEEE80211_F_DOFMCS | IEEE80211_F_DONEGO | 2036178354Ssam IEEE80211_F_DOBRS); 2037178354Ssam if (rate & IEEE80211_RATE_BASIC) { 2038178354Ssam ratesetmismatch(ni, wh, reassoc, resp, 2039178354Ssam "HT", rate); 2040178354Ssam vap->iv_stats.is_ht_assoc_norate++; 2041178354Ssam return; 2042178354Ssam } 2043183254Ssam ieee80211_ht_node_init(ni); 2044183254Ssam ieee80211_ht_updatehtcap(ni, htcap); 2045178354Ssam } else if (ni->ni_flags & IEEE80211_NODE_HT) 2046178354Ssam ieee80211_ht_node_cleanup(ni); 2047190579Ssam#ifdef IEEE80211_SUPPORT_SUPERG 2048190579Ssam else if (ni->ni_ath_flags & IEEE80211_NODE_ATH) 2049190579Ssam ieee80211_ff_node_cleanup(ni); 2050190579Ssam#endif 2051178354Ssam /* 2052178354Ssam * Allow AMPDU operation only with unencrypted traffic 2053178354Ssam * or AES-CCM; the 11n spec only specifies these ciphers 2054178354Ssam * so permitting any others is undefined and can lead 2055178354Ssam * to interoperability problems. 2056178354Ssam */ 2057178354Ssam if ((ni->ni_flags & IEEE80211_NODE_HT) && 2058178354Ssam (((vap->iv_flags & IEEE80211_F_WPA) && 2059178354Ssam rsnparms.rsn_ucastcipher != IEEE80211_CIPHER_AES_CCM) || 2060178354Ssam (vap->iv_flags & (IEEE80211_F_WPA|IEEE80211_F_PRIVACY)) == IEEE80211_F_PRIVACY)) { 2061178354Ssam IEEE80211_NOTE(vap, 2062178354Ssam IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni, 2063178354Ssam "disallow HT use because WEP or TKIP requested, " 2064178354Ssam "capinfo 0x%x ucastcipher %d", capinfo, 2065178354Ssam rsnparms.rsn_ucastcipher); 2066178354Ssam ieee80211_ht_node_cleanup(ni); 2067178354Ssam vap->iv_stats.is_ht_assoc_downgrade++; 2068178354Ssam } 2069178354Ssam /* 2070178354Ssam * If constrained to 11n-only stations reject legacy stations. 2071178354Ssam */ 2072178354Ssam if ((vap->iv_flags_ext & IEEE80211_FEXT_PUREN) && 2073178354Ssam (ni->ni_flags & IEEE80211_NODE_HT) == 0) { 2074178354Ssam htcapmismatch(ni, wh, reassoc, resp); 2075178354Ssam vap->iv_stats.is_ht_assoc_nohtcap++; 2076178354Ssam return; 2077178354Ssam } 2078178354Ssam IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 2079192468Ssam ni->ni_noise = nf; 2080178354Ssam ni->ni_intval = lintval; 2081178354Ssam ni->ni_capinfo = capinfo; 2082178354Ssam ni->ni_fhdwell = vap->iv_bss->ni_fhdwell; 2083178354Ssam ni->ni_fhindex = vap->iv_bss->ni_fhindex; 2084178354Ssam /* 2085178354Ssam * Store the IEs. 2086178354Ssam * XXX maybe better to just expand 2087178354Ssam */ 2088178354Ssam if (ieee80211_ies_init(&ni->ni_ies, sfrm, efrm - sfrm)) { 2089178354Ssam#define setie(_ie, _off) ieee80211_ies_setie(ni->ni_ies, _ie, _off) 2090178354Ssam if (wpa != NULL) 2091178354Ssam setie(wpa_ie, wpa - sfrm); 2092178354Ssam if (rsn != NULL) 2093178354Ssam setie(rsn_ie, rsn - sfrm); 2094178354Ssam if (htcap != NULL) 2095178354Ssam setie(htcap_ie, htcap - sfrm); 2096178354Ssam if (wme != NULL) { 2097178354Ssam setie(wme_ie, wme - sfrm); 2098178354Ssam /* 2099178354Ssam * Mark node as capable of QoS. 2100178354Ssam */ 2101178354Ssam ni->ni_flags |= IEEE80211_NODE_QOS; 2102178354Ssam } else 2103178354Ssam ni->ni_flags &= ~IEEE80211_NODE_QOS; 2104190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 2105178354Ssam if (ath != NULL) { 2106178354Ssam setie(ath_ie, ath - sfrm); 2107178354Ssam /* 2108178354Ssam * Parse ATH station parameters. 2109178354Ssam */ 2110178354Ssam ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 2111178354Ssam } else 2112190391Ssam#endif 2113178354Ssam ni->ni_ath_flags = 0; 2114178354Ssam#undef setie 2115178354Ssam } else { 2116178354Ssam ni->ni_flags &= ~IEEE80211_NODE_QOS; 2117178354Ssam ni->ni_ath_flags = 0; 2118178354Ssam } 2119178354Ssam ieee80211_node_join(ni, resp); 2120178354Ssam ieee80211_deliver_l2uf(ni); 2121178354Ssam break; 2122178354Ssam } 2123178354Ssam 2124178354Ssam case IEEE80211_FC0_SUBTYPE_DEAUTH: 2125178354Ssam case IEEE80211_FC0_SUBTYPE_DISASSOC: { 2126178354Ssam uint16_t reason; 2127178354Ssam 2128178354Ssam if (vap->iv_state != IEEE80211_S_RUN || 2129178354Ssam /* NB: can happen when in promiscuous mode */ 2130178354Ssam !IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) { 2131178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 2132178354Ssam break; 2133178354Ssam } 2134178354Ssam /* 2135178354Ssam * deauth/disassoc frame format 2136178354Ssam * [2] reason 2137178354Ssam */ 2138178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return); 2139178354Ssam reason = le16toh(*(uint16_t *)frm); 2140178354Ssam if (subtype == IEEE80211_FC0_SUBTYPE_DEAUTH) { 2141178354Ssam vap->iv_stats.is_rx_deauth++; 2142178354Ssam IEEE80211_NODE_STAT(ni, rx_deauth); 2143178354Ssam } else { 2144178354Ssam vap->iv_stats.is_rx_disassoc++; 2145178354Ssam IEEE80211_NODE_STAT(ni, rx_disassoc); 2146178354Ssam } 2147178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni, 2148178354Ssam "recv %s (reason %d)", ieee80211_mgt_subtype_name[subtype >> 2149178354Ssam IEEE80211_FC0_SUBTYPE_SHIFT], reason); 2150178354Ssam if (ni != vap->iv_bss) 2151178354Ssam ieee80211_node_leave(ni); 2152178354Ssam break; 2153178354Ssam } 2154178354Ssam 2155178354Ssam case IEEE80211_FC0_SUBTYPE_ACTION: 2156178354Ssam if (vap->iv_state == IEEE80211_S_RUN) { 2157178354Ssam if (ieee80211_parse_action(ni, m0) == 0) 2158178354Ssam ic->ic_recv_action(ni, frm, efrm); 2159178354Ssam } else 2160178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 2161178354Ssam break; 2162178354Ssam 2163178354Ssam case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 2164178354Ssam case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 2165178354Ssam default: 2166178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 2167178354Ssam wh, "mgt", "subtype 0x%x not handled", subtype); 2168178354Ssam vap->iv_stats.is_rx_badsubtype++; 2169178354Ssam break; 2170178354Ssam } 2171178354Ssam} 2172178354Ssam 2173191546Ssamstatic void 2174191546Ssamhostap_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype) 2175191546Ssam{ 2176191546Ssam switch (subtype) { 2177191546Ssam case IEEE80211_FC0_SUBTYPE_PS_POLL: 2178191546Ssam hostap_recv_pspoll(ni, m); 2179191546Ssam break; 2180191546Ssam case IEEE80211_FC0_SUBTYPE_BAR: 2181191546Ssam ieee80211_recv_bar(ni, m); 2182191546Ssam break; 2183191546Ssam } 2184191546Ssam} 2185191546Ssam 2186178354Ssam/* 2187178354Ssam * Process a received ps-poll frame. 2188178354Ssam */ 2189178354Ssamstatic void 2190178354Ssamhostap_recv_pspoll(struct ieee80211_node *ni, struct mbuf *m0) 2191178354Ssam{ 2192178354Ssam struct ieee80211vap *vap = ni->ni_vap; 2193178354Ssam struct ieee80211_frame_min *wh; 2194184288Ssam struct ifnet *ifp; 2195178354Ssam struct mbuf *m; 2196178354Ssam uint16_t aid; 2197178354Ssam int qlen; 2198178354Ssam 2199178354Ssam wh = mtod(m0, struct ieee80211_frame_min *); 2200178354Ssam if (ni->ni_associd == 0) { 2201178354Ssam IEEE80211_DISCARD(vap, 2202178354Ssam IEEE80211_MSG_POWER | IEEE80211_MSG_DEBUG, 2203178354Ssam (struct ieee80211_frame *) wh, NULL, 2204178354Ssam "%s", "unassociated station"); 2205178354Ssam vap->iv_stats.is_ps_unassoc++; 2206178354Ssam IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, 2207178354Ssam IEEE80211_REASON_NOT_ASSOCED); 2208178354Ssam return; 2209178354Ssam } 2210178354Ssam 2211178354Ssam aid = le16toh(*(uint16_t *)wh->i_dur); 2212178354Ssam if (aid != ni->ni_associd) { 2213178354Ssam IEEE80211_DISCARD(vap, 2214178354Ssam IEEE80211_MSG_POWER | IEEE80211_MSG_DEBUG, 2215178354Ssam (struct ieee80211_frame *) wh, NULL, 2216178354Ssam "aid mismatch: sta aid 0x%x poll aid 0x%x", 2217178354Ssam ni->ni_associd, aid); 2218178354Ssam vap->iv_stats.is_ps_badaid++; 2219180837Ssam /* 2220180837Ssam * NB: We used to deauth the station but it turns out 2221180837Ssam * the Blackberry Curve 8230 (and perhaps other devices) 2222180837Ssam * sometimes send the wrong AID when WME is negotiated. 2223180837Ssam * Being more lenient here seems ok as we already check 2224180837Ssam * the station is associated and we only return frames 2225180837Ssam * queued for the station (i.e. we don't use the AID). 2226180837Ssam */ 2227178354Ssam return; 2228178354Ssam } 2229178354Ssam 2230178354Ssam /* Okay, take the first queued packet and put it out... */ 2231184288Ssam m = ieee80211_node_psq_dequeue(ni, &qlen); 2232178354Ssam if (m == NULL) { 2233178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_POWER, wh->i_addr2, 2234178354Ssam "%s", "recv ps-poll, but queue empty"); 2235178354Ssam ieee80211_send_nulldata(ieee80211_ref_node(ni)); 2236178354Ssam vap->iv_stats.is_ps_qempty++; /* XXX node stat */ 2237178354Ssam if (vap->iv_set_tim != NULL) 2238178354Ssam vap->iv_set_tim(ni, 0); /* just in case */ 2239178354Ssam return; 2240178354Ssam } 2241178354Ssam /* 2242178354Ssam * If there are more packets, set the more packets bit 2243178354Ssam * in the packet dispatched to the station; otherwise 2244178354Ssam * turn off the TIM bit. 2245178354Ssam */ 2246178354Ssam if (qlen != 0) { 2247178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 2248178354Ssam "recv ps-poll, send packet, %u still queued", qlen); 2249178354Ssam m->m_flags |= M_MORE_DATA; 2250178354Ssam } else { 2251178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 2252178354Ssam "%s", "recv ps-poll, send packet, queue empty"); 2253178354Ssam if (vap->iv_set_tim != NULL) 2254178354Ssam vap->iv_set_tim(ni, 0); 2255178354Ssam } 2256178354Ssam m->m_flags |= M_PWR_SAV; /* bypass PS handling */ 2257184288Ssam 2258184288Ssam if (m->m_flags & M_ENCAP) 2259184288Ssam ifp = vap->iv_ic->ic_ifp; 2260184288Ssam else 2261184288Ssam ifp = vap->iv_ifp; 2262178354Ssam IF_ENQUEUE(&ifp->if_snd, m); 2263178354Ssam if_start(ifp); 2264178354Ssam} 2265