ieee80211_wds.c revision 283855
118334Speter/*- 2132718Skan * Copyright (c) 2007-2008 Sam Leffler, Errno Consulting 3169689Skan * All rights reserved. 418334Speter * 590075Sobrien * Redistribution and use in source and binary forms, with or without 618334Speter * modification, are permitted provided that the following conditions 790075Sobrien * are met: 890075Sobrien * 1. Redistributions of source code must retain the above copyright 990075Sobrien * notice, this list of conditions and the following disclaimer. 1090075Sobrien * 2. Redistributions in binary form must reproduce the above copyright 1118334Speter * notice, this list of conditions and the following disclaimer in the 1290075Sobrien * documentation and/or other materials provided with the distribution. 1390075Sobrien * 1490075Sobrien * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 1590075Sobrien * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 1618334Speter * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 1718334Speter * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 1890075Sobrien * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19169689Skan * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20169689Skan * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2118334Speter * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2218334Speter * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 2318334Speter * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2418334Speter */ 2518334Speter 2690075Sobrien#include <sys/cdefs.h> 2790075Sobrien#ifdef __FreeBSD__ 2818334Speter__FBSDID("$FreeBSD: stable/10/sys/net80211/ieee80211_wds.c 283855 2015-05-31 23:29:04Z ae $"); 2990075Sobrien#endif 3090075Sobrien 3118334Speter/* 3290075Sobrien * IEEE 802.11 WDS mode support. 3390075Sobrien */ 3418334Speter#include "opt_inet.h" 3590075Sobrien#include "opt_wlan.h" 3690075Sobrien 3718334Speter#include <sys/param.h> 3890075Sobrien#include <sys/systm.h> 3990075Sobrien#include <sys/mbuf.h> 4018334Speter#include <sys/malloc.h> 4190075Sobrien#include <sys/kernel.h> 4290075Sobrien 4390075Sobrien#include <sys/socket.h> 4418334Speter#include <sys/sockio.h> 4590075Sobrien#include <sys/endian.h> 4690075Sobrien#include <sys/errno.h> 4718334Speter#include <sys/proc.h> 4890075Sobrien#include <sys/sysctl.h> 4918334Speter 5090075Sobrien#include <net/if.h> 5118334Speter#include <net/if_media.h> 5290075Sobrien#include <net/if_llc.h> 5318334Speter#include <net/ethernet.h> 5490075Sobrien 5590075Sobrien#include <net/bpf.h> 5618334Speter 57169689Skan#include <net80211/ieee80211_var.h> 5818334Speter#include <net80211/ieee80211_wds.h> 5990075Sobrien#include <net80211/ieee80211_input.h> 60169689Skan#ifdef IEEE80211_SUPPORT_SUPERG 6118334Speter#include <net80211/ieee80211_superg.h> 6290075Sobrien#endif 6390075Sobrien 6490075Sobrienstatic void wds_vattach(struct ieee80211vap *); 6590075Sobrienstatic int wds_newstate(struct ieee80211vap *, enum ieee80211_state, int); 6690075Sobrienstatic int wds_input(struct ieee80211_node *ni, struct mbuf *m, int, int); 6790075Sobrienstatic void wds_recv_mgmt(struct ieee80211_node *, struct mbuf *, 6890075Sobrien int subtype, int, int); 6990075Sobrien 7090075Sobrienvoid 7190075Sobrienieee80211_wds_attach(struct ieee80211com *ic) 7290075Sobrien{ 7390075Sobrien ic->ic_vattach[IEEE80211_M_WDS] = wds_vattach; 7490075Sobrien} 7590075Sobrien 7618334Spetervoid 7718334Speterieee80211_wds_detach(struct ieee80211com *ic) 7818334Speter{ 7918334Speter} 8018334Speter 8118334Speterstatic void 8290075Sobrienwds_vdetach(struct ieee80211vap *vap) 8390075Sobrien{ 8490075Sobrien if (vap->iv_bss != NULL) { 8518334Speter /* XXX locking? */ 86132718Skan if (vap->iv_bss->ni_wdsvap == vap) 8750397Sobrien vap->iv_bss->ni_wdsvap = NULL; 88132718Skan } 89132718Skan} 9018334Speter 9190075Sobrienstatic void 9290075Sobrienwds_vattach(struct ieee80211vap *vap) 9318334Speter{ 9490075Sobrien vap->iv_newstate = wds_newstate; 9590075Sobrien vap->iv_input = wds_input; 9690075Sobrien vap->iv_recv_mgmt = wds_recv_mgmt; 9718334Speter vap->iv_opdetach = wds_vdetach; 9818334Speter} 9918334Speter 100132718Skanstatic void 101132718Skanwds_flush(struct ieee80211_node *ni) 10218334Speter{ 10318334Speter struct ieee80211com *ic = ni->ni_ic; 10418334Speter struct mbuf *m, *next; 10518334Speter int8_t rssi, nf; 10618334Speter 10718334Speter m = ieee80211_ageq_remove(&ic->ic_stageq, 10818334Speter (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr)); 10918334Speter if (m == NULL) 11018334Speter return; 11118334Speter 11218334Speter IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_WDS, ni, 11318334Speter "%s", "flush wds queue"); 11490075Sobrien ic->ic_node_getsignal(ni, &rssi, &nf); 11590075Sobrien for (; m != NULL; m = next) { 11690075Sobrien next = m->m_nextpkt; 11790075Sobrien m->m_nextpkt = NULL; 11890075Sobrien ieee80211_input(ni, m, rssi, nf); 11990075Sobrien } 12090075Sobrien} 12190075Sobrien 12290075Sobrienstatic int 12390075Sobrienieee80211_create_wds(struct ieee80211vap *vap, struct ieee80211_channel *chan) 12490075Sobrien{ 12590075Sobrien struct ieee80211com *ic = vap->iv_ic; 12690075Sobrien struct ieee80211_node_table *nt = &ic->ic_sta; 12790075Sobrien struct ieee80211_node *ni, *obss; 12890075Sobrien 12990075Sobrien IEEE80211_DPRINTF(vap, IEEE80211_MSG_WDS, 13090075Sobrien "%s: creating link to %s on channel %u\n", __func__, 13190075Sobrien ether_sprintf(vap->iv_des_bssid), ieee80211_chan2ieee(ic, chan)); 13290075Sobrien 13390075Sobrien /* NB: vap create must specify the bssid for the link */ 13490075Sobrien KASSERT(vap->iv_flags & IEEE80211_F_DESBSSID, ("no bssid")); 13590075Sobrien /* NB: we should only be called on RUN transition */ 13690075Sobrien KASSERT(vap->iv_state == IEEE80211_S_RUN, ("!RUN state")); 13790075Sobrien 13890075Sobrien if ((vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) == 0) { 13990075Sobrien /* 14090075Sobrien * Dynamic/non-legacy WDS. Reference the associated 14190075Sobrien * station specified by the desired bssid setup at vap 14290075Sobrien * create. Point ni_wdsvap at the WDS vap so 4-address 14390075Sobrien * frames received through the associated AP vap will 14490075Sobrien * be dispatched upward (e.g. to a bridge) as though 14590075Sobrien * they arrived on the WDS vap. 14690075Sobrien */ 14790075Sobrien IEEE80211_NODE_LOCK(nt); 14890075Sobrien obss = NULL; 14990075Sobrien ni = ieee80211_find_node_locked(&ic->ic_sta, vap->iv_des_bssid); 15090075Sobrien if (ni == NULL) { 15118334Speter /* 15218334Speter * Node went away before we could hookup. This 15318334Speter * should be ok; no traffic will flow and a leave 15418334Speter * event will be dispatched that should cause 15518334Speter * the vap to be destroyed. 15690075Sobrien */ 15790075Sobrien IEEE80211_DPRINTF(vap, IEEE80211_MSG_WDS, 15890075Sobrien "%s: station %s went away\n", 15918334Speter __func__, ether_sprintf(vap->iv_des_bssid)); 16018334Speter /* XXX stat? */ 161169689Skan } else if (ni->ni_wdsvap != NULL) { 16290075Sobrien /* 16318334Speter * Node already setup with a WDS vap; we cannot 16418334Speter * allow multiple references so disallow. If 16518334Speter * ni_wdsvap points at us that's ok; we should 16690075Sobrien * do nothing anyway. 16790075Sobrien */ 16890075Sobrien /* XXX printf instead? */ 16918334Speter IEEE80211_DPRINTF(vap, IEEE80211_MSG_WDS, 17018334Speter "%s: station %s in use with %s\n", 17190075Sobrien __func__, ether_sprintf(vap->iv_des_bssid), 17218334Speter ni->ni_wdsvap->iv_ifp->if_xname); 17390075Sobrien /* XXX stat? */ 17418334Speter } else { 175132718Skan /* 176132718Skan * Committed to new node, setup state. 177132718Skan */ 178132718Skan obss = vap->iv_bss; 179132718Skan vap->iv_bss = ni; 180132718Skan ni->ni_wdsvap = vap; 181132718Skan } 182132718Skan IEEE80211_NODE_UNLOCK(nt); 183132718Skan if (obss != NULL) { 184132718Skan /* NB: deferred to avoid recursive lock */ 185132718Skan ieee80211_free_node(obss); 186132718Skan } 187132718Skan } else { 188132718Skan /* 189132718Skan * Legacy WDS vap setup. 190169689Skan */ 191169689Skan /* 192169689Skan * The far end does not associate so we just create 193169689Skan * create a new node and install it as the vap's 19452284Sobrien * bss node. We must simulate an association and 195169689Skan * authorize the port for traffic to flow. 196169689Skan * XXX check if node already in sta table? 197169689Skan */ 198169689Skan ni = ieee80211_node_create_wds(vap, vap->iv_des_bssid, chan); 199169689Skan if (ni != NULL) { 20052284Sobrien obss = vap->iv_bss; 201169689Skan vap->iv_bss = ieee80211_ref_node(ni); 202169689Skan ni->ni_flags |= IEEE80211_NODE_AREF; 203169689Skan if (obss != NULL) 204169689Skan ieee80211_free_node(obss); 20552284Sobrien /* give driver a chance to setup state like ni_txrate */ 206169689Skan if (ic->ic_newassoc != NULL) 207169689Skan ic->ic_newassoc(ni, 1); 20852284Sobrien /* tell the authenticator about new station */ 209169689Skan if (vap->iv_auth->ia_node_join != NULL) 210169689Skan vap->iv_auth->ia_node_join(ni); 21152284Sobrien if (ni->ni_authmode != IEEE80211_AUTH_8021X) 212169689Skan ieee80211_node_authorize(ni); 213169689Skan 214169689Skan ieee80211_notify_node_join(ni, 1 /*newassoc*/); 215169689Skan /* XXX inject l2uf frame */ 216169689Skan } 217169689Skan } 218169689Skan 219169689Skan /* 22018334Speter * Flush any pending frames now that were setup. 221132718Skan */ 22218334Speter if (ni != NULL) 22318334Speter wds_flush(ni); 22490075Sobrien return (ni == NULL ? ENOENT : 0); 22518334Speter} 22618334Speter 22750397Sobrien/* 228132718Skan * Propagate multicast frames of an ap vap to all DWDS links. 229132718Skan * The caller is assumed to have verified this frame is multicast. 23050397Sobrien */ 23190075Sobrienvoid 23218334Speterieee80211_dwds_mcast(struct ieee80211vap *vap0, struct mbuf *m) 23390075Sobrien{ 23490075Sobrien struct ieee80211com *ic = vap0->iv_ic; 23590075Sobrien const struct ether_header *eh = mtod(m, const struct ether_header *); 23690075Sobrien struct ieee80211_node *ni; 23718334Speter struct ieee80211vap *vap; 23818334Speter struct ifnet *ifp; 23918334Speter struct mbuf *mcopy; 24018334Speter int err; 24118334Speter 24218334Speter KASSERT(ETHER_IS_MULTICAST(eh->ether_dhost), 24318334Speter ("%s not mcast", ether_sprintf(eh->ether_dhost))); 24490075Sobrien 24518334Speter /* XXX locking */ 246132718Skan TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 247169689Skan /* only DWDS vaps are interesting */ 24818334Speter if (vap->iv_opmode != IEEE80211_M_WDS || 24918334Speter (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY)) 25018334Speter continue; 251132718Skan /* if it came in this interface, don't send it back out */ 25218334Speter ifp = vap->iv_ifp; 25390075Sobrien if (ifp == m->m_pkthdr.rcvif) 25418334Speter continue; 25590075Sobrien /* 25690075Sobrien * Duplicate the frame and send it. 25790075Sobrien */ 25818334Speter mcopy = m_copypacket(m, M_NOWAIT); 25990075Sobrien if (mcopy == NULL) { 26018334Speter ifp->if_oerrors++; 26190075Sobrien /* XXX stat + msg */ 26290075Sobrien continue; 26390075Sobrien } 26490075Sobrien ni = ieee80211_find_txnode(vap, eh->ether_dhost); 26590075Sobrien if (ni == NULL) { 26690075Sobrien /* NB: ieee80211_find_txnode does stat+msg */ 26790075Sobrien ifp->if_oerrors++; 26890075Sobrien m_freem(mcopy); 26990075Sobrien continue; 27090075Sobrien } 27190075Sobrien /* calculate priority so drivers can find the tx queue */ 27290075Sobrien if (ieee80211_classify(ni, mcopy)) { 27318334Speter IEEE80211_DISCARD_MAC(vap, 27490075Sobrien IEEE80211_MSG_OUTPUT | IEEE80211_MSG_WDS, 27590075Sobrien eh->ether_dhost, NULL, 27618334Speter "%s", "classification failure"); 27790075Sobrien vap->iv_stats.is_tx_classify++; 278132718Skan ifp->if_oerrors++; 27990075Sobrien m_freem(mcopy); 28090075Sobrien ieee80211_free_node(ni); 28190075Sobrien continue; 28290075Sobrien } 28390075Sobrien 28490075Sobrien BPF_MTAP(ifp, m); /* 802.3 tx */ 28590075Sobrien 28618334Speter /* 28790075Sobrien * Encapsulate the packet in prep for transmission. 28890075Sobrien */ 28918334Speter mcopy = ieee80211_encap(vap, ni, mcopy); 29090075Sobrien if (mcopy == NULL) { 29190075Sobrien /* NB: stat+msg handled in ieee80211_encap */ 29218334Speter ieee80211_free_node(ni); 29318334Speter continue; 294132718Skan } 29590075Sobrien mcopy->m_flags |= M_MCAST; 29618334Speter mcopy->m_pkthdr.rcvif = (void *) ni; 29790075Sobrien 29890075Sobrien err = ieee80211_parent_xmitpkt(ic, mcopy); 299169689Skan if (err) { 30090075Sobrien /* NB: IFQ_HANDOFF reclaims mbuf */ 30118334Speter ifp->if_oerrors++; 30290075Sobrien ieee80211_free_node(ni); 30318334Speter } else { 30490075Sobrien ifp->if_opackets++; 30590075Sobrien if_inc_counter(ifp, IFCOUNTER_OMCASTS, 1); 30690075Sobrien if_inc_counter(ifp, IFCOUNTER_OBYTES, 30790075Sobrien m->m_pkthdr.len); 30890075Sobrien } 30990075Sobrien } 31018334Speter} 31190075Sobrien 31290075Sobrien/* 31390075Sobrien * Handle DWDS discovery on receipt of a 4-address frame in 31490075Sobrien * ap mode. Queue the frame and post an event for someone 31590075Sobrien * to plumb the necessary WDS vap for this station. Frames 31618334Speter * received prior to the vap set running will then be reprocessed 31718334Speter * as if they were just received. 31890075Sobrien */ 31918334Spetervoid 32090075Sobrienieee80211_dwds_discover(struct ieee80211_node *ni, struct mbuf *m) 32190075Sobrien{ 32290075Sobrien struct ieee80211com *ic = ni->ni_ic; 32390075Sobrien 32490075Sobrien /* 32590075Sobrien * Save the frame with an aging interval 4 times 32690075Sobrien * the listen interval specified by the station. 32718334Speter * Frames that sit around too long are reclaimed 32818334Speter * using this information. 32990075Sobrien * XXX handle overflow? 33090075Sobrien * XXX per/vap beacon interval? 33190075Sobrien */ 332132718Skan m->m_pkthdr.rcvif = (void *)(uintptr_t) 333132718Skan ieee80211_mac_hash(ic, ni->ni_macaddr); 334132718Skan (void) ieee80211_ageq_append(&ic->ic_stageq, m, 335132718Skan ((ni->ni_intval * ic->ic_lintval) << 2) / 1024); 336132718Skan ieee80211_notify_wds_discover(ni); 33790075Sobrien} 33890075Sobrien 33918334Speter/* 34090075Sobrien * IEEE80211_M_WDS vap state machine handler. 34190075Sobrien */ 342132718Skanstatic int 343132718Skanwds_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 344132718Skan{ 345132718Skan struct ieee80211com *ic = vap->iv_ic; 346132718Skan struct ieee80211_node *ni; 347132718Skan enum ieee80211_state ostate; 34890075Sobrien int error; 34990075Sobrien 35018334Speter IEEE80211_LOCK_ASSERT(ic); 35196263Sobrien 35296263Sobrien ostate = vap->iv_state; 35396263Sobrien IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s\n", __func__, 35496263Sobrien ieee80211_state_name[ostate], ieee80211_state_name[nstate]); 35596263Sobrien vap->iv_state = nstate; /* state transition */ 35696263Sobrien callout_stop(&vap->iv_mgtsend); /* XXX callout_drain */ 35796263Sobrien if (ostate != IEEE80211_S_SCAN) 35890075Sobrien ieee80211_cancel_scan(vap); /* background scan */ 35990075Sobrien ni = vap->iv_bss; /* NB: no reference held */ 36090075Sobrien error = 0; 36190075Sobrien switch (nstate) { 36218334Speter case IEEE80211_S_INIT: 36390075Sobrien switch (ostate) { 364132718Skan case IEEE80211_S_SCAN: 365132718Skan ieee80211_cancel_scan(vap); 366132718Skan break; 367132718Skan default: 368132718Skan break; 36918334Speter } 37090075Sobrien if (ostate != IEEE80211_S_INIT) { 37190075Sobrien /* NB: optimize INIT -> INIT case */ 372132718Skan ieee80211_reset_bss(vap); 373132718Skan } 374132718Skan break; 375132718Skan case IEEE80211_S_SCAN: 376132718Skan switch (ostate) { 377132718Skan case IEEE80211_S_INIT: 37890075Sobrien ieee80211_check_scan_current(vap); 379132718Skan break; 380132718Skan default: 381132718Skan break; 382132718Skan } 383132718Skan break; 38490075Sobrien case IEEE80211_S_RUN: 38590075Sobrien if (ostate == IEEE80211_S_INIT) { 386169689Skan /* 38790075Sobrien * Already have a channel; bypass the scan 38818334Speter * and startup immediately. 38990075Sobrien */ 39090075Sobrien error = ieee80211_create_wds(vap, ic->ic_curchan); 39190075Sobrien } 39290075Sobrien break; 39390075Sobrien default: 39490075Sobrien break; 39590075Sobrien } 39690075Sobrien return error; 39790075Sobrien} 39890075Sobrien 39990075Sobrien/* 40090075Sobrien * Process a received frame. The node associated with the sender 40190075Sobrien * should be supplied. If nothing was found in the node table then 40290075Sobrien * the caller is assumed to supply a reference to iv_bss instead. 40318334Speter * The RSSI and a timestamp are also supplied. The RSSI data is used 40490075Sobrien * during AP scanning to select a AP to associate with; it can have 40590075Sobrien * any units so long as values have consistent units and higher values 406132718Skan * mean ``better signal''. The receive timestamp is currently not used 40790075Sobrien * by the 802.11 layer. 40890075Sobrien */ 409132718Skanstatic int 41090075Sobrienwds_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf) 411132718Skan{ 412132718Skan#define HAS_SEQ(type) ((type & 0x4) == 0) 413132718Skan struct ieee80211vap *vap = ni->ni_vap; 414132718Skan struct ieee80211com *ic = ni->ni_ic; 41590075Sobrien struct ifnet *ifp = vap->iv_ifp; 41690075Sobrien struct ieee80211_frame *wh; 41790075Sobrien struct ieee80211_key *key; 41818334Speter struct ether_header *eh; 41990075Sobrien int hdrspace, need_tap = 1; /* mbuf need to be tapped. */ 42090075Sobrien uint8_t dir, type, subtype, qos; 42190075Sobrien uint16_t rxseq; 42218334Speter 42318334Speter if (m->m_flags & M_AMPDU_MPDU) { 42418334Speter /* 42518334Speter * Fastpath for A-MPDU reorder q resubmission. Frames 42618334Speter * w/ M_AMPDU_MPDU marked have already passed through 42718334Speter * here but were received out of order and been held on 42818334Speter * the reorder queue. When resubmitted they are marked 42918334Speter * with the M_AMPDU_MPDU flag and we can bypass most of 430132718Skan * the normal processing. 431132718Skan */ 43218334Speter wh = mtod(m, struct ieee80211_frame *); 43390075Sobrien type = IEEE80211_FC0_TYPE_DATA; 43490075Sobrien dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 43518334Speter subtype = IEEE80211_FC0_SUBTYPE_QOS; 43618334Speter hdrspace = ieee80211_hdrspace(ic, wh); /* XXX optimize? */ 43718334Speter goto resubmit_ampdu; 43818334Speter } 43918334Speter 44018334Speter KASSERT(ni != NULL, ("null node")); 44118334Speter 44218334Speter type = -1; /* undefined */ 44318334Speter 44418334Speter if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 44518334Speter IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 44618334Speter ni->ni_macaddr, NULL, 44718334Speter "too short (1): len %u", m->m_pkthdr.len); 44890075Sobrien vap->iv_stats.is_rx_tooshort++; 44990075Sobrien goto out; 45090075Sobrien } 45118334Speter /* 45218334Speter * Bit of a cheat here, we use a pointer for a 3-address 45390075Sobrien * frame format but don't reference fields past outside 45418334Speter * ieee80211_frame_min w/o first validating the data is 45590075Sobrien * present. 45690075Sobrien */ 45790075Sobrien wh = mtod(m, struct ieee80211_frame *); 45818334Speter 45990075Sobrien if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) 46090075Sobrien ni->ni_inact = ni->ni_inact_reload; 46190075Sobrien 46290075Sobrien if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 46390075Sobrien IEEE80211_FC0_VERSION_0) { 46490075Sobrien IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 46590075Sobrien ni->ni_macaddr, NULL, "wrong version, fc %02x:%02x", 46690075Sobrien wh->i_fc[0], wh->i_fc[1]); 46790075Sobrien vap->iv_stats.is_rx_badversion++; 46890075Sobrien goto err; 46918334Speter } 47018334Speter 47118334Speter dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 47218334Speter type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 47318334Speter subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 47418334Speter 47518334Speter /* NB: WDS vap's do not scan */ 47618334Speter if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_addr4)) { 47790075Sobrien IEEE80211_DISCARD_MAC(vap, 47890075Sobrien IEEE80211_MSG_ANY, ni->ni_macaddr, NULL, 47990075Sobrien "too short (3): len %u", m->m_pkthdr.len); 48018334Speter vap->iv_stats.is_rx_tooshort++; 48118334Speter goto out; 48290075Sobrien } 48318334Speter /* NB: the TA is implicitly verified by finding the wds peer node */ 48490075Sobrien if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr) && 48590075Sobrien !IEEE80211_ADDR_EQ(wh->i_addr1, ifp->if_broadcastaddr)) { 48690075Sobrien /* not interested in */ 48718334Speter IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 48890075Sobrien wh->i_addr1, NULL, "%s", "not to bss"); 48990075Sobrien vap->iv_stats.is_rx_wrongbss++; 49090075Sobrien goto out; 49190075Sobrien } 49290075Sobrien IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 49390075Sobrien ni->ni_noise = nf; 49490075Sobrien if (HAS_SEQ(type)) { 49590075Sobrien uint8_t tid = ieee80211_gettid(wh); 49690075Sobrien if (IEEE80211_QOS_HAS_SEQ(wh) && 49790075Sobrien TID_TO_WME_AC(tid) >= WME_AC_VI) 49818334Speter ic->ic_wme.wme_hipri_traffic++; 49918334Speter rxseq = le16toh(*(uint16_t *)wh->i_seq); 50018334Speter if (! ieee80211_check_rxseq(ni, wh)) { 50118334Speter /* duplicate, discard */ 50218334Speter IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 50318334Speter wh->i_addr1, "duplicate", 50418334Speter "seqno <%u,%u> fragno <%u,%u> tid %u", 50518334Speter rxseq >> IEEE80211_SEQ_SEQ_SHIFT, 50618334Speter ni->ni_rxseqs[tid] >> IEEE80211_SEQ_SEQ_SHIFT, 50790075Sobrien rxseq & IEEE80211_SEQ_FRAG_MASK, 50890075Sobrien ni->ni_rxseqs[tid] & IEEE80211_SEQ_FRAG_MASK, 50990075Sobrien tid); 51018334Speter vap->iv_stats.is_rx_dup++; 51118334Speter IEEE80211_NODE_STAT(ni, rx_dup); 51290075Sobrien goto out; 51390075Sobrien } 51490075Sobrien ni->ni_rxseqs[tid] = rxseq; 51590075Sobrien } 51690075Sobrien switch (type) { 51790075Sobrien case IEEE80211_FC0_TYPE_DATA: 51890075Sobrien hdrspace = ieee80211_hdrspace(ic, wh); 51990075Sobrien if (m->m_len < hdrspace && 52090075Sobrien (m = m_pullup(m, hdrspace)) == NULL) { 52190075Sobrien IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 52290075Sobrien ni->ni_macaddr, NULL, 52390075Sobrien "data too short: expecting %u", hdrspace); 52490075Sobrien vap->iv_stats.is_rx_tooshort++; 52590075Sobrien goto out; /* XXX */ 52618334Speter } 52790075Sobrien if (dir != IEEE80211_FC1_DIR_DSTODS) { 52818334Speter IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 52918334Speter wh, "data", "incorrect dir 0x%x", dir); 53018334Speter vap->iv_stats.is_rx_wrongdir++; 53118334Speter goto out; 53218334Speter } 53318334Speter /* 53496263Sobrien * Only legacy WDS traffic should take this path. 53518334Speter */ 53618334Speter if ((vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) == 0) { 53790075Sobrien IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 53818334Speter wh, "data", "%s", "not legacy wds"); 53918334Speter vap->iv_stats.is_rx_wrongdir++;/*XXX*/ 54018334Speter goto out; 54190075Sobrien } 54218334Speter /* 543132718Skan * Handle A-MPDU re-ordering. If the frame is to be 54450397Sobrien * processed directly then ieee80211_ampdu_reorder 54550397Sobrien * will return 0; otherwise it has consumed the mbuf 54618334Speter * and we should do nothing more with it. 54718334Speter */ 54818334Speter if ((m->m_flags & M_AMPDU) && 54918334Speter ieee80211_ampdu_reorder(ni, m) != 0) { 55018334Speter m = NULL; 55118334Speter goto out; 55218334Speter } 55318334Speter resubmit_ampdu: 55450397Sobrien 55590075Sobrien /* 55618334Speter * Handle privacy requirements. Note that we 55718334Speter * must not be preempted from here until after 55818334Speter * we (potentially) call ieee80211_crypto_demic; 55918334Speter * otherwise we may violate assumptions in the 56090075Sobrien * crypto cipher modules used to do delayed update 56118334Speter * of replay sequence numbers. 56218334Speter */ 56318334Speter if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 56490075Sobrien if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 56590075Sobrien /* 56690075Sobrien * Discard encrypted frames when privacy is off. 56790075Sobrien */ 568132718Skan IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 56990075Sobrien wh, "WEP", "%s", "PRIVACY off"); 57090075Sobrien vap->iv_stats.is_rx_noprivacy++; 57190075Sobrien IEEE80211_NODE_STAT(ni, rx_noprivacy); 57290075Sobrien goto out; 57390075Sobrien } 57490075Sobrien key = ieee80211_crypto_decap(ni, m, hdrspace); 57590075Sobrien if (key == NULL) { 57690075Sobrien /* NB: stats+msgs handled in crypto_decap */ 57790075Sobrien IEEE80211_NODE_STAT(ni, rx_wepfail); 57890075Sobrien goto out; 57990075Sobrien } 58090075Sobrien wh = mtod(m, struct ieee80211_frame *); 58190075Sobrien wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED; 58290075Sobrien } else { 58390075Sobrien /* XXX M_WEP and IEEE80211_F_PRIVACY */ 58490075Sobrien key = NULL; 58590075Sobrien } 58690075Sobrien 58790075Sobrien /* 58890075Sobrien * Save QoS bits for use below--before we strip the header. 58990075Sobrien */ 59090075Sobrien if (subtype == IEEE80211_FC0_SUBTYPE_QOS) { 59190075Sobrien qos = (dir == IEEE80211_FC1_DIR_DSTODS) ? 59290075Sobrien ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] : 59390075Sobrien ((struct ieee80211_qosframe *)wh)->i_qos[0]; 59490075Sobrien } else 59590075Sobrien qos = 0; 59690075Sobrien 59790075Sobrien /* 59890075Sobrien * Next up, any fragmentation. 59990075Sobrien */ 60090075Sobrien if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 60190075Sobrien m = ieee80211_defrag(ni, m, hdrspace); 60290075Sobrien if (m == NULL) { 60390075Sobrien /* Fragment dropped or frame not complete yet */ 60490075Sobrien goto out; 60590075Sobrien } 606132718Skan } 60790075Sobrien wh = NULL; /* no longer valid, catch any uses */ 60890075Sobrien 60990075Sobrien /* 61090075Sobrien * Next strip any MSDU crypto bits. 61190075Sobrien */ 61290075Sobrien if (key != NULL && !ieee80211_crypto_demic(vap, key, m, 0)) { 61390075Sobrien IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 61490075Sobrien ni->ni_macaddr, "data", "%s", "demic error"); 61590075Sobrien vap->iv_stats.is_rx_demicfail++; 61690075Sobrien IEEE80211_NODE_STAT(ni, rx_demicfail); 61790075Sobrien goto out; 61890075Sobrien } 61990075Sobrien 62090075Sobrien /* copy to listener after decrypt */ 62190075Sobrien if (ieee80211_radiotap_active_vap(vap)) 62290075Sobrien ieee80211_radiotap_rx(vap, m); 62390075Sobrien need_tap = 0; 62490075Sobrien 62590075Sobrien /* 62690075Sobrien * Finally, strip the 802.11 header. 62790075Sobrien */ 62890075Sobrien m = ieee80211_decap(vap, m, hdrspace); 62990075Sobrien if (m == NULL) { 63090075Sobrien /* XXX mask bit to check for both */ 63190075Sobrien /* don't count Null data frames as errors */ 63290075Sobrien if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 63390075Sobrien subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 63490075Sobrien goto out; 63590075Sobrien IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 63690075Sobrien ni->ni_macaddr, "data", "%s", "decap error"); 63790075Sobrien vap->iv_stats.is_rx_decap++; 63890075Sobrien IEEE80211_NODE_STAT(ni, rx_decap); 63990075Sobrien goto err; 64090075Sobrien } 64190075Sobrien eh = mtod(m, struct ether_header *); 64290075Sobrien if (!ieee80211_node_is_authorized(ni)) { 64390075Sobrien /* 64490075Sobrien * Deny any non-PAE frames received prior to 64590075Sobrien * authorization. For open/shared-key 64690075Sobrien * authentication the port is mark authorized 64790075Sobrien * after authentication completes. For 802.1x 64890075Sobrien * the port is not marked authorized by the 64990075Sobrien * authenticator until the handshake has completed. 65090075Sobrien */ 65190075Sobrien if (eh->ether_type != htons(ETHERTYPE_PAE)) { 65290075Sobrien IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 65390075Sobrien eh->ether_shost, "data", 65418334Speter "unauthorized port: ether type 0x%x len %u", 65518334Speter eh->ether_type, m->m_pkthdr.len); 65618334Speter vap->iv_stats.is_rx_unauth++; 65718334Speter IEEE80211_NODE_STAT(ni, rx_unauth); 65818334Speter goto err; 65918334Speter } 660132718Skan } else { 66118334Speter /* 66290075Sobrien * When denying unencrypted frames, discard 66390075Sobrien * any non-PAE frames received without encryption. 66418334Speter */ 66590075Sobrien if ((vap->iv_flags & IEEE80211_F_DROPUNENC) && 66690075Sobrien (key == NULL && (m->m_flags & M_WEP) == 0) && 66718334Speter eh->ether_type != htons(ETHERTYPE_PAE)) { 66890075Sobrien /* 66990075Sobrien * Drop unencrypted frames. 67018334Speter */ 671132718Skan vap->iv_stats.is_rx_unencrypted++; 672132718Skan IEEE80211_NODE_STAT(ni, rx_unencrypted); 67390075Sobrien goto out; 67490075Sobrien } 675169689Skan } 67690075Sobrien /* XXX require HT? */ 67790075Sobrien if (qos & IEEE80211_QOS_AMSDU) { 67890075Sobrien m = ieee80211_decap_amsdu(ni, m); 67918334Speter if (m == NULL) 68018334Speter return IEEE80211_FC0_TYPE_DATA; 68190075Sobrien } else { 68290075Sobrien#ifdef IEEE80211_SUPPORT_SUPERG 68318334Speter m = ieee80211_decap_fastframe(vap, ni, m); 68490075Sobrien if (m == NULL) 68590075Sobrien return IEEE80211_FC0_TYPE_DATA; 68618334Speter#endif 68790075Sobrien } 68818334Speter ieee80211_deliver_data(vap, ni, m); 68918334Speter return IEEE80211_FC0_TYPE_DATA; 69018334Speter 691169689Skan case IEEE80211_FC0_TYPE_MGT: 692169689Skan vap->iv_stats.is_rx_mgmt++; 69396263Sobrien IEEE80211_NODE_STAT(ni, rx_mgmt); 69418334Speter if (dir != IEEE80211_FC1_DIR_NODS) { 69518334Speter IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 69690075Sobrien wh, "data", "incorrect dir 0x%x", dir); 697169689Skan vap->iv_stats.is_rx_wrongdir++; 698169689Skan goto err; 699169689Skan } 700169689Skan if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 701169689Skan IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 702169689Skan ni->ni_macaddr, "mgt", "too short: len %u", 703169689Skan m->m_pkthdr.len); 704169689Skan vap->iv_stats.is_rx_tooshort++; 705169689Skan goto out; 706169689Skan } 70750397Sobrien#ifdef IEEE80211_DEBUG 70850397Sobrien if (ieee80211_msg_debug(vap) || ieee80211_msg_dumppkts(vap)) { 70950397Sobrien if_printf(ifp, "received %s from %s rssi %d\n", 71050397Sobrien ieee80211_mgt_subtype_name[subtype >> 71118334Speter IEEE80211_FC0_SUBTYPE_SHIFT], 71218334Speter ether_sprintf(wh->i_addr2), rssi); 71318334Speter } 71418334Speter#endif 71590075Sobrien if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 71690075Sobrien IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 71790075Sobrien wh, NULL, "%s", "WEP set but not permitted"); 71818334Speter vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 71990075Sobrien goto out; 72090075Sobrien } 72190075Sobrien vap->iv_recv_mgmt(ni, m, subtype, rssi, nf); 72290075Sobrien goto out; 72390075Sobrien 72418334Speter case IEEE80211_FC0_TYPE_CTL: 72590075Sobrien vap->iv_stats.is_rx_ctl++; 72618334Speter IEEE80211_NODE_STAT(ni, rx_ctrl); 72718334Speter goto out; 72818334Speter 72990075Sobrien default: 73090075Sobrien IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 73118334Speter wh, "bad", "frame type 0x%x", type); 73218334Speter /* should not come here */ 73318334Speter break; 73418334Speter } 73518334Spetererr: 73618334Speter ifp->if_ierrors++; 737132718Skanout: 73818334Speter if (m != NULL) { 73990075Sobrien if (need_tap && ieee80211_radiotap_active_vap(vap)) 74090075Sobrien ieee80211_radiotap_rx(vap, m); 74190075Sobrien m_freem(m); 74290075Sobrien } 74318334Speter return type; 74490075Sobrien} 74518334Speter 746132718Skanstatic void 747132718Skanwds_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, 748132718Skan int subtype, int rssi, int nf) 749132718Skan{ 750132718Skan struct ieee80211vap *vap = ni->ni_vap; 751132718Skan struct ieee80211com *ic = ni->ni_ic; 752132718Skan struct ieee80211_frame *wh; 753132718Skan u_int8_t *frm, *efrm; 754169689Skan 755169689Skan wh = mtod(m0, struct ieee80211_frame *); 756169689Skan frm = (u_int8_t *)&wh[1]; 757169689Skan efrm = mtod(m0, u_int8_t *) + m0->m_len; 758169689Skan switch (subtype) { 759169689Skan case IEEE80211_FC0_SUBTYPE_ACTION: 760169689Skan case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: 761169689Skan if (ni == vap->iv_bss) { 762169689Skan IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 763169689Skan wh, NULL, "%s", "unknown node"); 764169689Skan vap->iv_stats.is_rx_mgtdiscard++; 765169689Skan } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1)) { 766169689Skan /* NB: not interested in multicast frames. */ 767169689Skan IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 768132718Skan wh, NULL, "%s", "not for us"); 769132718Skan vap->iv_stats.is_rx_mgtdiscard++; 770132718Skan } else if (vap->iv_state != IEEE80211_S_RUN) { 771132718Skan IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 772132718Skan wh, NULL, "wrong state %s", 773132718Skan ieee80211_state_name[vap->iv_state]); 774132718Skan vap->iv_stats.is_rx_mgtdiscard++; 775132718Skan } else { 776132718Skan if (ieee80211_parse_action(ni, m0) == 0) 777132718Skan (void)ic->ic_recv_action(ni, wh, frm, efrm); 778169689Skan } 779132718Skan break; 780132718Skan 781132718Skan case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 782132718Skan case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 783132718Skan case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 784132718Skan case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 785132718Skan case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 786132718Skan case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 787132718Skan case IEEE80211_FC0_SUBTYPE_BEACON: 788132718Skan case IEEE80211_FC0_SUBTYPE_ATIM: 789132718Skan case IEEE80211_FC0_SUBTYPE_DISASSOC: 790132718Skan case IEEE80211_FC0_SUBTYPE_AUTH: 791132718Skan case IEEE80211_FC0_SUBTYPE_DEAUTH: 792132718Skan IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 793132718Skan wh, NULL, "%s", "not handled"); 794132718Skan vap->iv_stats.is_rx_mgtdiscard++; 795132718Skan break; 796132718Skan 797132718Skan default: 798132718Skan IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 799132718Skan wh, "mgt", "subtype 0x%x not handled", subtype); 800132718Skan vap->iv_stats.is_rx_badsubtype++; 801132718Skan break; 802132718Skan } 803132718Skan} 804132718Skan