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: stable/11/sys/net80211/ieee80211_wds.c 344969 2019-03-09 12:54:10Z avos $"); 29178354Ssam#endif 30178354Ssam 31178354Ssam/* 32178354Ssam * IEEE 802.11 WDS mode support. 33178354Ssam */ 34178354Ssam#include "opt_inet.h" 35178354Ssam#include "opt_wlan.h" 36178354Ssam 37178354Ssam#include <sys/param.h> 38178354Ssam#include <sys/systm.h> 39178354Ssam#include <sys/mbuf.h> 40178354Ssam#include <sys/malloc.h> 41178354Ssam#include <sys/kernel.h> 42178354Ssam 43178354Ssam#include <sys/socket.h> 44178354Ssam#include <sys/sockio.h> 45178354Ssam#include <sys/endian.h> 46178354Ssam#include <sys/errno.h> 47178354Ssam#include <sys/proc.h> 48178354Ssam#include <sys/sysctl.h> 49178354Ssam 50178354Ssam#include <net/if.h> 51257176Sglebius#include <net/if_var.h> 52178354Ssam#include <net/if_media.h> 53178354Ssam#include <net/if_llc.h> 54178354Ssam#include <net/ethernet.h> 55178354Ssam 56178354Ssam#include <net/bpf.h> 57178354Ssam 58178354Ssam#include <net80211/ieee80211_var.h> 59178354Ssam#include <net80211/ieee80211_wds.h> 60178354Ssam#include <net80211/ieee80211_input.h> 61190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 62190391Ssam#include <net80211/ieee80211_superg.h> 63190391Ssam#endif 64178354Ssam 65178354Ssamstatic void wds_vattach(struct ieee80211vap *); 66178354Ssamstatic int wds_newstate(struct ieee80211vap *, enum ieee80211_state, int); 67283535Sadrianstatic int wds_input(struct ieee80211_node *ni, struct mbuf *m, 68283535Sadrian const struct ieee80211_rx_stats *rxs, int, int); 69283535Sadrianstatic void wds_recv_mgmt(struct ieee80211_node *, struct mbuf *, int subtype, 70283535Sadrian const struct ieee80211_rx_stats *, int, int); 71178354Ssam 72178354Ssamvoid 73178354Ssamieee80211_wds_attach(struct ieee80211com *ic) 74178354Ssam{ 75178354Ssam ic->ic_vattach[IEEE80211_M_WDS] = wds_vattach; 76178354Ssam} 77178354Ssam 78178354Ssamvoid 79178354Ssamieee80211_wds_detach(struct ieee80211com *ic) 80178354Ssam{ 81178354Ssam} 82178354Ssam 83178354Ssamstatic void 84178354Ssamwds_vdetach(struct ieee80211vap *vap) 85178354Ssam{ 86178354Ssam if (vap->iv_bss != NULL) { 87178354Ssam /* XXX locking? */ 88178354Ssam if (vap->iv_bss->ni_wdsvap == vap) 89178354Ssam vap->iv_bss->ni_wdsvap = NULL; 90178354Ssam } 91178354Ssam} 92178354Ssam 93178354Ssamstatic void 94178354Ssamwds_vattach(struct ieee80211vap *vap) 95178354Ssam{ 96178354Ssam vap->iv_newstate = wds_newstate; 97178354Ssam vap->iv_input = wds_input; 98178354Ssam vap->iv_recv_mgmt = wds_recv_mgmt; 99178354Ssam vap->iv_opdetach = wds_vdetach; 100178354Ssam} 101178354Ssam 102195379Ssamstatic void 103195379Ssamwds_flush(struct ieee80211_node *ni) 104195379Ssam{ 105195379Ssam struct ieee80211com *ic = ni->ni_ic; 106195379Ssam struct mbuf *m, *next; 107195379Ssam int8_t rssi, nf; 108195379Ssam 109195379Ssam m = ieee80211_ageq_remove(&ic->ic_stageq, 110195379Ssam (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr)); 111195379Ssam if (m == NULL) 112195379Ssam return; 113195379Ssam 114195379Ssam IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_WDS, ni, 115195379Ssam "%s", "flush wds queue"); 116195379Ssam ic->ic_node_getsignal(ni, &rssi, &nf); 117195379Ssam for (; m != NULL; m = next) { 118195379Ssam next = m->m_nextpkt; 119195379Ssam m->m_nextpkt = NULL; 120195379Ssam ieee80211_input(ni, m, rssi, nf); 121195379Ssam } 122195379Ssam} 123195379Ssam 124178354Ssamstatic int 125178354Ssamieee80211_create_wds(struct ieee80211vap *vap, struct ieee80211_channel *chan) 126178354Ssam{ 127178354Ssam struct ieee80211com *ic = vap->iv_ic; 128178354Ssam struct ieee80211_node_table *nt = &ic->ic_sta; 129178354Ssam struct ieee80211_node *ni, *obss; 130178354Ssam 131178354Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_WDS, 132178354Ssam "%s: creating link to %s on channel %u\n", __func__, 133178354Ssam ether_sprintf(vap->iv_des_bssid), ieee80211_chan2ieee(ic, chan)); 134178354Ssam 135178354Ssam /* NB: vap create must specify the bssid for the link */ 136178354Ssam KASSERT(vap->iv_flags & IEEE80211_F_DESBSSID, ("no bssid")); 137178354Ssam /* NB: we should only be called on RUN transition */ 138178354Ssam KASSERT(vap->iv_state == IEEE80211_S_RUN, ("!RUN state")); 139178354Ssam 140178354Ssam if ((vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) == 0) { 141178354Ssam /* 142178354Ssam * Dynamic/non-legacy WDS. Reference the associated 143178354Ssam * station specified by the desired bssid setup at vap 144178354Ssam * create. Point ni_wdsvap at the WDS vap so 4-address 145178354Ssam * frames received through the associated AP vap will 146178354Ssam * be dispatched upward (e.g. to a bridge) as though 147178354Ssam * they arrived on the WDS vap. 148178354Ssam */ 149178354Ssam IEEE80211_NODE_LOCK(nt); 150178354Ssam obss = NULL; 151178354Ssam ni = ieee80211_find_node_locked(&ic->ic_sta, vap->iv_des_bssid); 152178354Ssam if (ni == NULL) { 153178354Ssam /* 154178354Ssam * Node went away before we could hookup. This 155178354Ssam * should be ok; no traffic will flow and a leave 156178354Ssam * event will be dispatched that should cause 157178354Ssam * the vap to be destroyed. 158178354Ssam */ 159178354Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_WDS, 160178354Ssam "%s: station %s went away\n", 161178354Ssam __func__, ether_sprintf(vap->iv_des_bssid)); 162178354Ssam /* XXX stat? */ 163178354Ssam } else if (ni->ni_wdsvap != NULL) { 164178354Ssam /* 165178354Ssam * Node already setup with a WDS vap; we cannot 166178354Ssam * allow multiple references so disallow. If 167178354Ssam * ni_wdsvap points at us that's ok; we should 168178354Ssam * do nothing anyway. 169178354Ssam */ 170178354Ssam /* XXX printf instead? */ 171178354Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_WDS, 172178354Ssam "%s: station %s in use with %s\n", 173178354Ssam __func__, ether_sprintf(vap->iv_des_bssid), 174178354Ssam ni->ni_wdsvap->iv_ifp->if_xname); 175178354Ssam /* XXX stat? */ 176178354Ssam } else { 177178354Ssam /* 178178354Ssam * Committed to new node, setup state. 179178354Ssam */ 180178354Ssam obss = vap->iv_bss; 181178354Ssam vap->iv_bss = ni; 182178354Ssam ni->ni_wdsvap = vap; 183178354Ssam } 184178354Ssam IEEE80211_NODE_UNLOCK(nt); 185178354Ssam if (obss != NULL) { 186178354Ssam /* NB: deferred to avoid recursive lock */ 187178354Ssam ieee80211_free_node(obss); 188178354Ssam } 189178354Ssam } else { 190178354Ssam /* 191178354Ssam * Legacy WDS vap setup. 192178354Ssam */ 193178354Ssam /* 194178354Ssam * The far end does not associate so we just create 195178354Ssam * create a new node and install it as the vap's 196178354Ssam * bss node. We must simulate an association and 197178354Ssam * authorize the port for traffic to flow. 198178354Ssam * XXX check if node already in sta table? 199178354Ssam */ 200178354Ssam ni = ieee80211_node_create_wds(vap, vap->iv_des_bssid, chan); 201178354Ssam if (ni != NULL) { 202178354Ssam obss = vap->iv_bss; 203178354Ssam vap->iv_bss = ieee80211_ref_node(ni); 204178354Ssam ni->ni_flags |= IEEE80211_NODE_AREF; 205178354Ssam if (obss != NULL) 206178354Ssam ieee80211_free_node(obss); 207178354Ssam /* give driver a chance to setup state like ni_txrate */ 208178354Ssam if (ic->ic_newassoc != NULL) 209178354Ssam ic->ic_newassoc(ni, 1); 210178354Ssam /* tell the authenticator about new station */ 211178354Ssam if (vap->iv_auth->ia_node_join != NULL) 212178354Ssam vap->iv_auth->ia_node_join(ni); 213178354Ssam if (ni->ni_authmode != IEEE80211_AUTH_8021X) 214178354Ssam ieee80211_node_authorize(ni); 215178354Ssam 216178354Ssam ieee80211_notify_node_join(ni, 1 /*newassoc*/); 217178354Ssam /* XXX inject l2uf frame */ 218178354Ssam } 219178354Ssam } 220178354Ssam 221178354Ssam /* 222195379Ssam * Flush any pending frames now that were setup. 223178354Ssam */ 224195379Ssam if (ni != NULL) 225195379Ssam wds_flush(ni); 226178354Ssam return (ni == NULL ? ENOENT : 0); 227178354Ssam} 228178354Ssam 229178354Ssam/* 230178354Ssam * Propagate multicast frames of an ap vap to all DWDS links. 231178354Ssam * The caller is assumed to have verified this frame is multicast. 232178354Ssam */ 233178354Ssamvoid 234178354Ssamieee80211_dwds_mcast(struct ieee80211vap *vap0, struct mbuf *m) 235178354Ssam{ 236178354Ssam struct ieee80211com *ic = vap0->iv_ic; 237178354Ssam const struct ether_header *eh = mtod(m, const struct ether_header *); 238178354Ssam struct ieee80211_node *ni; 239178354Ssam struct ieee80211vap *vap; 240178354Ssam struct ifnet *ifp; 241178354Ssam struct mbuf *mcopy; 242178354Ssam int err; 243178354Ssam 244178354Ssam KASSERT(ETHER_IS_MULTICAST(eh->ether_dhost), 245178354Ssam ("%s not mcast", ether_sprintf(eh->ether_dhost))); 246178354Ssam 247178354Ssam /* XXX locking */ 248178354Ssam TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 249178354Ssam /* only DWDS vaps are interesting */ 250178354Ssam if (vap->iv_opmode != IEEE80211_M_WDS || 251178354Ssam (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY)) 252178354Ssam continue; 253178354Ssam /* if it came in this interface, don't send it back out */ 254178354Ssam ifp = vap->iv_ifp; 255178354Ssam if (ifp == m->m_pkthdr.rcvif) 256178354Ssam continue; 257178354Ssam /* 258190672Ssam * Duplicate the frame and send it. 259178354Ssam */ 260243882Sglebius mcopy = m_copypacket(m, M_NOWAIT); 261178354Ssam if (mcopy == NULL) { 262271861Sglebius if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 263178354Ssam /* XXX stat + msg */ 264178354Ssam continue; 265178354Ssam } 266178354Ssam ni = ieee80211_find_txnode(vap, eh->ether_dhost); 267178354Ssam if (ni == NULL) { 268178354Ssam /* NB: ieee80211_find_txnode does stat+msg */ 269271861Sglebius if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 270178354Ssam m_freem(mcopy); 271178354Ssam continue; 272178354Ssam } 273190672Ssam /* calculate priority so drivers can find the tx queue */ 274178354Ssam if (ieee80211_classify(ni, mcopy)) { 275178354Ssam IEEE80211_DISCARD_MAC(vap, 276178354Ssam IEEE80211_MSG_OUTPUT | IEEE80211_MSG_WDS, 277178354Ssam eh->ether_dhost, NULL, 278178354Ssam "%s", "classification failure"); 279178354Ssam vap->iv_stats.is_tx_classify++; 280271861Sglebius if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 281178354Ssam m_freem(mcopy); 282178354Ssam ieee80211_free_node(ni); 283178354Ssam continue; 284178354Ssam } 285191542Ssam 286191542Ssam BPF_MTAP(ifp, m); /* 802.3 tx */ 287191542Ssam 288190672Ssam /* 289190672Ssam * Encapsulate the packet in prep for transmission. 290190672Ssam */ 291297287Savos IEEE80211_TX_LOCK(ic); 292190672Ssam mcopy = ieee80211_encap(vap, ni, mcopy); 293194461Srpaulo if (mcopy == NULL) { 294190672Ssam /* NB: stat+msg handled in ieee80211_encap */ 295297287Savos IEEE80211_TX_UNLOCK(ic); 296190672Ssam ieee80211_free_node(ni); 297190672Ssam continue; 298190672Ssam } 299190672Ssam mcopy->m_flags |= M_MCAST; 300178354Ssam mcopy->m_pkthdr.rcvif = (void *) ni; 301178354Ssam 302254082Sadrian err = ieee80211_parent_xmitpkt(ic, mcopy); 303297287Savos IEEE80211_TX_UNLOCK(ic); 304289164Sadrian if (!err) { 305271861Sglebius if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1); 306283313Sae if_inc_counter(ifp, IFCOUNTER_OMCASTS, 1); 307283313Sae if_inc_counter(ifp, IFCOUNTER_OBYTES, 308283313Sae m->m_pkthdr.len); 309283313Sae } 310178354Ssam } 311178354Ssam} 312178354Ssam 313178354Ssam/* 314178354Ssam * Handle DWDS discovery on receipt of a 4-address frame in 315178354Ssam * ap mode. Queue the frame and post an event for someone 316178354Ssam * to plumb the necessary WDS vap for this station. Frames 317178354Ssam * received prior to the vap set running will then be reprocessed 318178354Ssam * as if they were just received. 319178354Ssam */ 320178354Ssamvoid 321178354Ssamieee80211_dwds_discover(struct ieee80211_node *ni, struct mbuf *m) 322178354Ssam{ 323178354Ssam struct ieee80211com *ic = ni->ni_ic; 324178354Ssam 325195379Ssam /* 326195379Ssam * Save the frame with an aging interval 4 times 327195379Ssam * the listen interval specified by the station. 328195379Ssam * Frames that sit around too long are reclaimed 329195379Ssam * using this information. 330195379Ssam * XXX handle overflow? 331195379Ssam * XXX per/vap beacon interval? 332195379Ssam */ 333195379Ssam m->m_pkthdr.rcvif = (void *)(uintptr_t) 334195379Ssam ieee80211_mac_hash(ic, ni->ni_macaddr); 335195379Ssam (void) ieee80211_ageq_append(&ic->ic_stageq, m, 336195379Ssam ((ni->ni_intval * ic->ic_lintval) << 2) / 1024); 337178354Ssam ieee80211_notify_wds_discover(ni); 338178354Ssam} 339178354Ssam 340178354Ssam/* 341178354Ssam * IEEE80211_M_WDS vap state machine handler. 342178354Ssam */ 343178354Ssamstatic int 344178354Ssamwds_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 345178354Ssam{ 346178354Ssam struct ieee80211com *ic = vap->iv_ic; 347178354Ssam enum ieee80211_state ostate; 348178354Ssam int error; 349178354Ssam 350178354Ssam IEEE80211_LOCK_ASSERT(ic); 351178354Ssam 352178354Ssam ostate = vap->iv_state; 353178354Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s\n", __func__, 354178354Ssam ieee80211_state_name[ostate], ieee80211_state_name[nstate]); 355178354Ssam vap->iv_state = nstate; /* state transition */ 356178354Ssam callout_stop(&vap->iv_mgtsend); /* XXX callout_drain */ 357178354Ssam if (ostate != IEEE80211_S_SCAN) 358178354Ssam ieee80211_cancel_scan(vap); /* background scan */ 359178354Ssam error = 0; 360178354Ssam switch (nstate) { 361178354Ssam case IEEE80211_S_INIT: 362178354Ssam switch (ostate) { 363178354Ssam case IEEE80211_S_SCAN: 364178354Ssam ieee80211_cancel_scan(vap); 365178354Ssam break; 366178354Ssam default: 367178354Ssam break; 368178354Ssam } 369178354Ssam if (ostate != IEEE80211_S_INIT) { 370178354Ssam /* NB: optimize INIT -> INIT case */ 371178354Ssam ieee80211_reset_bss(vap); 372178354Ssam } 373178354Ssam break; 374178354Ssam case IEEE80211_S_SCAN: 375178354Ssam switch (ostate) { 376178354Ssam case IEEE80211_S_INIT: 377178354Ssam ieee80211_check_scan_current(vap); 378178354Ssam break; 379178354Ssam default: 380178354Ssam break; 381178354Ssam } 382178354Ssam break; 383178354Ssam case IEEE80211_S_RUN: 384178354Ssam if (ostate == IEEE80211_S_INIT) { 385178354Ssam /* 386178354Ssam * Already have a channel; bypass the scan 387178354Ssam * and startup immediately. 388178354Ssam */ 389178354Ssam error = ieee80211_create_wds(vap, ic->ic_curchan); 390178354Ssam } 391178354Ssam break; 392178354Ssam default: 393178354Ssam break; 394178354Ssam } 395178354Ssam return error; 396178354Ssam} 397178354Ssam 398178354Ssam/* 399178354Ssam * Process a received frame. The node associated with the sender 400178354Ssam * should be supplied. If nothing was found in the node table then 401178354Ssam * the caller is assumed to supply a reference to iv_bss instead. 402178354Ssam * The RSSI and a timestamp are also supplied. The RSSI data is used 403178354Ssam * during AP scanning to select a AP to associate with; it can have 404178354Ssam * any units so long as values have consistent units and higher values 405178354Ssam * mean ``better signal''. The receive timestamp is currently not used 406178354Ssam * by the 802.11 layer. 407178354Ssam */ 408178354Ssamstatic int 409283535Sadrianwds_input(struct ieee80211_node *ni, struct mbuf *m, 410283535Sadrian const struct ieee80211_rx_stats *rxs, int rssi, int nf) 411178354Ssam{ 412178354Ssam struct ieee80211vap *vap = ni->ni_vap; 413178354Ssam struct ieee80211com *ic = ni->ni_ic; 414178354Ssam struct ifnet *ifp = vap->iv_ifp; 415178354Ssam struct ieee80211_frame *wh; 416178354Ssam struct ieee80211_key *key; 417178354Ssam struct ether_header *eh; 418203422Srpaulo int hdrspace, need_tap = 1; /* mbuf need to be tapped. */ 419178354Ssam uint8_t dir, type, subtype, qos; 420178354Ssam 421183247Ssam if (m->m_flags & M_AMPDU_MPDU) { 422178354Ssam /* 423178354Ssam * Fastpath for A-MPDU reorder q resubmission. Frames 424183247Ssam * w/ M_AMPDU_MPDU marked have already passed through 425183247Ssam * here but were received out of order and been held on 426183247Ssam * the reorder queue. When resubmitted they are marked 427183247Ssam * with the M_AMPDU_MPDU flag and we can bypass most of 428183247Ssam * the normal processing. 429178354Ssam */ 430178354Ssam wh = mtod(m, struct ieee80211_frame *); 431178354Ssam type = IEEE80211_FC0_TYPE_DATA; 432178354Ssam dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 433178354Ssam subtype = IEEE80211_FC0_SUBTYPE_QOS; 434178354Ssam hdrspace = ieee80211_hdrspace(ic, wh); /* XXX optimize? */ 435178354Ssam goto resubmit_ampdu; 436178354Ssam } 437178354Ssam 438178354Ssam KASSERT(ni != NULL, ("null node")); 439178354Ssam 440178354Ssam type = -1; /* undefined */ 441178354Ssam 442178354Ssam if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 443178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 444178354Ssam ni->ni_macaddr, NULL, 445178354Ssam "too short (1): len %u", m->m_pkthdr.len); 446178354Ssam vap->iv_stats.is_rx_tooshort++; 447178354Ssam goto out; 448178354Ssam } 449178354Ssam /* 450178354Ssam * Bit of a cheat here, we use a pointer for a 3-address 451178354Ssam * frame format but don't reference fields past outside 452178354Ssam * ieee80211_frame_min w/o first validating the data is 453178354Ssam * present. 454178354Ssam */ 455178354Ssam wh = mtod(m, struct ieee80211_frame *); 456178354Ssam 457218958Sbschmidt if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) 458218958Sbschmidt ni->ni_inact = ni->ni_inact_reload; 459218958Sbschmidt 460178354Ssam if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 461178354Ssam IEEE80211_FC0_VERSION_0) { 462178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 463191547Ssam ni->ni_macaddr, NULL, "wrong version, fc %02x:%02x", 464191547Ssam wh->i_fc[0], wh->i_fc[1]); 465178354Ssam vap->iv_stats.is_rx_badversion++; 466178354Ssam goto err; 467178354Ssam } 468178354Ssam 469178354Ssam dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 470178354Ssam type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 471178354Ssam subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 472178354Ssam 473178354Ssam /* NB: WDS vap's do not scan */ 474178354Ssam if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_addr4)) { 475178354Ssam IEEE80211_DISCARD_MAC(vap, 476178354Ssam IEEE80211_MSG_ANY, ni->ni_macaddr, NULL, 477178354Ssam "too short (3): len %u", m->m_pkthdr.len); 478178354Ssam vap->iv_stats.is_rx_tooshort++; 479178354Ssam goto out; 480178354Ssam } 481178354Ssam /* NB: the TA is implicitly verified by finding the wds peer node */ 482178354Ssam if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr) && 483178354Ssam !IEEE80211_ADDR_EQ(wh->i_addr1, ifp->if_broadcastaddr)) { 484178354Ssam /* not interested in */ 485178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 486178354Ssam wh->i_addr1, NULL, "%s", "not to bss"); 487178354Ssam vap->iv_stats.is_rx_wrongbss++; 488178354Ssam goto out; 489178354Ssam } 490178354Ssam IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 491192468Ssam ni->ni_noise = nf; 492282820Sadrian if (IEEE80211_HAS_SEQ(type, subtype)) { 493178354Ssam uint8_t tid = ieee80211_gettid(wh); 494178354Ssam if (IEEE80211_QOS_HAS_SEQ(wh) && 495178354Ssam TID_TO_WME_AC(tid) >= WME_AC_VI) 496178354Ssam ic->ic_wme.wme_hipri_traffic++; 497296254Savos if (! ieee80211_check_rxseq(ni, wh, wh->i_addr1)) 498178354Ssam goto out; 499178354Ssam } 500178354Ssam switch (type) { 501178354Ssam case IEEE80211_FC0_TYPE_DATA: 502178354Ssam hdrspace = ieee80211_hdrspace(ic, wh); 503178354Ssam if (m->m_len < hdrspace && 504178354Ssam (m = m_pullup(m, hdrspace)) == NULL) { 505178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 506178354Ssam ni->ni_macaddr, NULL, 507178354Ssam "data too short: expecting %u", hdrspace); 508178354Ssam vap->iv_stats.is_rx_tooshort++; 509178354Ssam goto out; /* XXX */ 510178354Ssam } 511178354Ssam if (dir != IEEE80211_FC1_DIR_DSTODS) { 512178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 513178354Ssam wh, "data", "incorrect dir 0x%x", dir); 514178354Ssam vap->iv_stats.is_rx_wrongdir++; 515178354Ssam goto out; 516178354Ssam } 517178354Ssam /* 518178354Ssam * Only legacy WDS traffic should take this path. 519178354Ssam */ 520178354Ssam if ((vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) == 0) { 521178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 522178354Ssam wh, "data", "%s", "not legacy wds"); 523178354Ssam vap->iv_stats.is_rx_wrongdir++;/*XXX*/ 524178354Ssam goto out; 525178354Ssam } 526178354Ssam /* 527183247Ssam * Handle A-MPDU re-ordering. If the frame is to be 528183247Ssam * processed directly then ieee80211_ampdu_reorder 529178354Ssam * will return 0; otherwise it has consumed the mbuf 530178354Ssam * and we should do nothing more with it. 531178354Ssam */ 532183247Ssam if ((m->m_flags & M_AMPDU) && 533178354Ssam ieee80211_ampdu_reorder(ni, m) != 0) { 534178354Ssam m = NULL; 535178354Ssam goto out; 536178354Ssam } 537178354Ssam resubmit_ampdu: 538178354Ssam 539178354Ssam /* 540178354Ssam * Handle privacy requirements. Note that we 541178354Ssam * must not be preempted from here until after 542178354Ssam * we (potentially) call ieee80211_crypto_demic; 543178354Ssam * otherwise we may violate assumptions in the 544178354Ssam * crypto cipher modules used to do delayed update 545178354Ssam * of replay sequence numbers. 546178354Ssam */ 547260444Skevlo if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 548178354Ssam if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 549178354Ssam /* 550178354Ssam * Discard encrypted frames when privacy is off. 551178354Ssam */ 552178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 553178354Ssam wh, "WEP", "%s", "PRIVACY off"); 554178354Ssam vap->iv_stats.is_rx_noprivacy++; 555178354Ssam IEEE80211_NODE_STAT(ni, rx_noprivacy); 556178354Ssam goto out; 557178354Ssam } 558178354Ssam key = ieee80211_crypto_decap(ni, m, hdrspace); 559178354Ssam if (key == NULL) { 560178354Ssam /* NB: stats+msgs handled in crypto_decap */ 561178354Ssam IEEE80211_NODE_STAT(ni, rx_wepfail); 562178354Ssam goto out; 563178354Ssam } 564178354Ssam wh = mtod(m, struct ieee80211_frame *); 565260444Skevlo wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED; 566178354Ssam } else { 567178354Ssam /* XXX M_WEP and IEEE80211_F_PRIVACY */ 568178354Ssam key = NULL; 569178354Ssam } 570178354Ssam 571178354Ssam /* 572178354Ssam * Save QoS bits for use below--before we strip the header. 573178354Ssam */ 574344969Savos if (subtype == IEEE80211_FC0_SUBTYPE_QOS) 575344969Savos qos = ieee80211_getqos(wh)[0]; 576344969Savos else 577178354Ssam qos = 0; 578178354Ssam 579178354Ssam /* 580178354Ssam * Next up, any fragmentation. 581178354Ssam */ 582178354Ssam if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 583178354Ssam m = ieee80211_defrag(ni, m, hdrspace); 584178354Ssam if (m == NULL) { 585178354Ssam /* Fragment dropped or frame not complete yet */ 586178354Ssam goto out; 587178354Ssam } 588178354Ssam } 589178354Ssam wh = NULL; /* no longer valid, catch any uses */ 590178354Ssam 591178354Ssam /* 592178354Ssam * Next strip any MSDU crypto bits. 593178354Ssam */ 594178354Ssam if (key != NULL && !ieee80211_crypto_demic(vap, key, m, 0)) { 595178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 596178354Ssam ni->ni_macaddr, "data", "%s", "demic error"); 597178354Ssam vap->iv_stats.is_rx_demicfail++; 598178354Ssam IEEE80211_NODE_STAT(ni, rx_demicfail); 599178354Ssam goto out; 600178354Ssam } 601178354Ssam 602178354Ssam /* copy to listener after decrypt */ 603192468Ssam if (ieee80211_radiotap_active_vap(vap)) 604192468Ssam ieee80211_radiotap_rx(vap, m); 605178354Ssam need_tap = 0; 606178354Ssam 607178354Ssam /* 608178354Ssam * Finally, strip the 802.11 header. 609178354Ssam */ 610178354Ssam m = ieee80211_decap(vap, m, hdrspace); 611178354Ssam if (m == NULL) { 612178354Ssam /* XXX mask bit to check for both */ 613178354Ssam /* don't count Null data frames as errors */ 614178354Ssam if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 615178354Ssam subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 616178354Ssam goto out; 617178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 618178354Ssam ni->ni_macaddr, "data", "%s", "decap error"); 619178354Ssam vap->iv_stats.is_rx_decap++; 620178354Ssam IEEE80211_NODE_STAT(ni, rx_decap); 621178354Ssam goto err; 622178354Ssam } 623178354Ssam eh = mtod(m, struct ether_header *); 624178354Ssam if (!ieee80211_node_is_authorized(ni)) { 625178354Ssam /* 626178354Ssam * Deny any non-PAE frames received prior to 627178354Ssam * authorization. For open/shared-key 628178354Ssam * authentication the port is mark authorized 629178354Ssam * after authentication completes. For 802.1x 630178354Ssam * the port is not marked authorized by the 631178354Ssam * authenticator until the handshake has completed. 632178354Ssam */ 633178354Ssam if (eh->ether_type != htons(ETHERTYPE_PAE)) { 634178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 635178354Ssam eh->ether_shost, "data", 636178354Ssam "unauthorized port: ether type 0x%x len %u", 637178354Ssam eh->ether_type, m->m_pkthdr.len); 638178354Ssam vap->iv_stats.is_rx_unauth++; 639178354Ssam IEEE80211_NODE_STAT(ni, rx_unauth); 640178354Ssam goto err; 641178354Ssam } 642178354Ssam } else { 643178354Ssam /* 644178354Ssam * When denying unencrypted frames, discard 645178354Ssam * any non-PAE frames received without encryption. 646178354Ssam */ 647178354Ssam if ((vap->iv_flags & IEEE80211_F_DROPUNENC) && 648178354Ssam (key == NULL && (m->m_flags & M_WEP) == 0) && 649178354Ssam eh->ether_type != htons(ETHERTYPE_PAE)) { 650178354Ssam /* 651178354Ssam * Drop unencrypted frames. 652178354Ssam */ 653178354Ssam vap->iv_stats.is_rx_unencrypted++; 654178354Ssam IEEE80211_NODE_STAT(ni, rx_unencrypted); 655178354Ssam goto out; 656178354Ssam } 657178354Ssam } 658178354Ssam /* XXX require HT? */ 659178354Ssam if (qos & IEEE80211_QOS_AMSDU) { 660178354Ssam m = ieee80211_decap_amsdu(ni, m); 661178354Ssam if (m == NULL) 662178354Ssam return IEEE80211_FC0_TYPE_DATA; 663190391Ssam } else { 664190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 665190391Ssam m = ieee80211_decap_fastframe(vap, ni, m); 666190391Ssam if (m == NULL) 667178354Ssam return IEEE80211_FC0_TYPE_DATA; 668190391Ssam#endif 669178354Ssam } 670178354Ssam ieee80211_deliver_data(vap, ni, m); 671178354Ssam return IEEE80211_FC0_TYPE_DATA; 672178354Ssam 673178354Ssam case IEEE80211_FC0_TYPE_MGT: 674178354Ssam vap->iv_stats.is_rx_mgmt++; 675178354Ssam IEEE80211_NODE_STAT(ni, rx_mgmt); 676178354Ssam if (dir != IEEE80211_FC1_DIR_NODS) { 677178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 678178354Ssam wh, "data", "incorrect dir 0x%x", dir); 679178354Ssam vap->iv_stats.is_rx_wrongdir++; 680178354Ssam goto err; 681178354Ssam } 682178354Ssam if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 683178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 684178354Ssam ni->ni_macaddr, "mgt", "too short: len %u", 685178354Ssam m->m_pkthdr.len); 686178354Ssam vap->iv_stats.is_rx_tooshort++; 687178354Ssam goto out; 688178354Ssam } 689178354Ssam#ifdef IEEE80211_DEBUG 690178354Ssam if (ieee80211_msg_debug(vap) || ieee80211_msg_dumppkts(vap)) { 691178354Ssam if_printf(ifp, "received %s from %s rssi %d\n", 692298376Savos ieee80211_mgt_subtype_name(subtype), 693178354Ssam ether_sprintf(wh->i_addr2), rssi); 694178354Ssam } 695178354Ssam#endif 696260444Skevlo if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 697178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 698178354Ssam wh, NULL, "%s", "WEP set but not permitted"); 699178354Ssam vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 700178354Ssam goto out; 701178354Ssam } 702283535Sadrian vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf); 703192468Ssam goto out; 704178354Ssam 705178354Ssam case IEEE80211_FC0_TYPE_CTL: 706178354Ssam vap->iv_stats.is_rx_ctl++; 707178354Ssam IEEE80211_NODE_STAT(ni, rx_ctrl); 708178354Ssam goto out; 709192468Ssam 710178354Ssam default: 711178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 712178354Ssam wh, "bad", "frame type 0x%x", type); 713178354Ssam /* should not come here */ 714178354Ssam break; 715178354Ssam } 716178354Ssamerr: 717271861Sglebius if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 718178354Ssamout: 719178354Ssam if (m != NULL) { 720192765Ssam if (need_tap && ieee80211_radiotap_active_vap(vap)) 721192468Ssam ieee80211_radiotap_rx(vap, m); 722178354Ssam m_freem(m); 723178354Ssam } 724178354Ssam return type; 725178354Ssam} 726178354Ssam 727178354Ssamstatic void 728283535Sadrianwds_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype, 729283535Sadrian const struct ieee80211_rx_stats *rxs, int rssi, int nf) 730178354Ssam{ 731178354Ssam struct ieee80211vap *vap = ni->ni_vap; 732178354Ssam struct ieee80211com *ic = ni->ni_ic; 733178354Ssam struct ieee80211_frame *wh; 734178354Ssam u_int8_t *frm, *efrm; 735178354Ssam 736178354Ssam wh = mtod(m0, struct ieee80211_frame *); 737178354Ssam frm = (u_int8_t *)&wh[1]; 738178354Ssam efrm = mtod(m0, u_int8_t *) + m0->m_len; 739178354Ssam switch (subtype) { 740218927Sbschmidt case IEEE80211_FC0_SUBTYPE_ACTION: 741218927Sbschmidt case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: 742218958Sbschmidt if (ni == vap->iv_bss) { 743218958Sbschmidt IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 744218958Sbschmidt wh, NULL, "%s", "unknown node"); 745218927Sbschmidt vap->iv_stats.is_rx_mgtdiscard++; 746218958Sbschmidt } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1)) { 747218958Sbschmidt /* NB: not interested in multicast frames. */ 748218927Sbschmidt IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 749218958Sbschmidt wh, NULL, "%s", "not for us"); 750218958Sbschmidt vap->iv_stats.is_rx_mgtdiscard++; 751218958Sbschmidt } else if (vap->iv_state != IEEE80211_S_RUN) { 752218958Sbschmidt IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 753218927Sbschmidt wh, NULL, "wrong state %s", 754218927Sbschmidt ieee80211_state_name[vap->iv_state]); 755218927Sbschmidt vap->iv_stats.is_rx_mgtdiscard++; 756218958Sbschmidt } else { 757218958Sbschmidt if (ieee80211_parse_action(ni, m0) == 0) 758218958Sbschmidt (void)ic->ic_recv_action(ni, wh, frm, efrm); 759218927Sbschmidt } 760218927Sbschmidt break; 761218927Sbschmidt 762178354Ssam case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 763218927Sbschmidt case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 764178354Ssam case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 765178354Ssam case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 766218927Sbschmidt case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 767218927Sbschmidt case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 768295795Savos case IEEE80211_FC0_SUBTYPE_TIMING_ADV: 769218927Sbschmidt case IEEE80211_FC0_SUBTYPE_BEACON: 770218927Sbschmidt case IEEE80211_FC0_SUBTYPE_ATIM: 771178354Ssam case IEEE80211_FC0_SUBTYPE_DISASSOC: 772218927Sbschmidt case IEEE80211_FC0_SUBTYPE_AUTH: 773218927Sbschmidt case IEEE80211_FC0_SUBTYPE_DEAUTH: 774218927Sbschmidt IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 775218927Sbschmidt wh, NULL, "%s", "not handled"); 776178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 777178354Ssam break; 778218927Sbschmidt 779178354Ssam default: 780178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 781218927Sbschmidt wh, "mgt", "subtype 0x%x not handled", subtype); 782178354Ssam vap->iv_stats.is_rx_badsubtype++; 783178354Ssam break; 784178354Ssam } 785178354Ssam} 786