ieee80211_output.c revision 289162
164499Swollman/*- 22742Swollman * Copyright (c) 2001 Atsushi Onoe 352770Sgrog * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting 42742Swollman * All rights reserved. 52742Swollman * 62742Swollman * Redistribution and use in source and binary forms, with or without 72742Swollman * modification, are permitted provided that the following conditions 82742Swollman * are met: 92742Swollman * 1. Redistributions of source code must retain the above copyright 102742Swollman * notice, this list of conditions and the following disclaimer. 1158787Sru * 2. Redistributions in binary form must reproduce the above copyright 122742Swollman * notice, this list of conditions and the following disclaimer in the 132742Swollman * documentation and/or other materials provided with the distribution. 142742Swollman * 152742Swollman * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 162742Swollman * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 172742Swollman * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 1858787Sru * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 1958787Sru * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 2058787Sru * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 212742Swollman * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 222742Swollman * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 239908Swollman * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 242742Swollman * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2530711Swollman */ 262742Swollman 279908Swollman#include <sys/cdefs.h> 282742Swollman__FBSDID("$FreeBSD: head/sys/net80211/ieee80211_output.c 289162 2015-10-12 03:27:08Z adrian $"); 2958787Sru 3058787Sru#include "opt_inet.h" 3114343Swollman#include "opt_inet6.h" 3214343Swollman#include "opt_wlan.h" 3314343Swollman 3414343Swollman#include <sys/param.h> 3514343Swollman#include <sys/systm.h> 362742Swollman#include <sys/mbuf.h> 379908Swollman#include <sys/kernel.h> 3820094Swollman#include <sys/endian.h> 3920094Swollman 4020094Swollman#include <sys/socket.h> 4120094Swollman 4220094Swollman#include <net/bpf.h> 4320094Swollman#include <net/ethernet.h> 4420094Swollman#include <net/if.h> 4520094Swollman#include <net/if_var.h> 4620094Swollman#include <net/if_llc.h> 4720094Swollman#include <net/if_media.h> 4820094Swollman#include <net/if_vlan_var.h> 4920094Swollman 5020094Swollman#include <net80211/ieee80211_var.h> 5158787Sru#include <net80211/ieee80211_regdomain.h> 5258787Sru#ifdef IEEE80211_SUPPORT_SUPERG 5321217Swollman#include <net80211/ieee80211_superg.h> 5421217Swollman#endif 5558787Sru#ifdef IEEE80211_SUPPORT_TDMA 5658787Sru#include <net80211/ieee80211_tdma.h> 572742Swollman#endif 5858787Sru#include <net80211/ieee80211_wds.h> 5921217Swollman#include <net80211/ieee80211_mesh.h> 6020094Swollman 6158787Sru#if defined(INET) || defined(INET6) 6258787Sru#include <netinet/in.h> 6320094Swollman#endif 642742Swollman 659908Swollman#ifdef INET 662742Swollman#include <netinet/if_ether.h> 6714343Swollman#include <netinet/in_systm.h> 6814343Swollman#include <netinet/ip.h> 6914343Swollman#endif 7014343Swollman#ifdef INET6 7114343Swollman#include <netinet/ip6.h> 7214343Swollman#endif 7364499Swollman 7464499Swollman#include <security/mac/mac_framework.h> 7564499Swollman 7664499Swollman#define ETHER_HEADER_COPY(dst, src) \ 7764499Swollman memcpy(dst, src, sizeof(struct ether_header)) 7814343Swollman 792742Swollman/* unalligned little endian access */ 802742Swollman#define LE_WRITE_2(p, v) do { \ 812742Swollman ((uint8_t *)(p))[0] = (v) & 0xff; \ 8258787Sru ((uint8_t *)(p))[1] = ((v) >> 8) & 0xff; \ 832742Swollman} while (0) 842742Swollman#define LE_WRITE_4(p, v) do { \ 859908Swollman ((uint8_t *)(p))[0] = (v) & 0xff; \ 862742Swollman ((uint8_t *)(p))[1] = ((v) >> 8) & 0xff; \ 8758787Sru ((uint8_t *)(p))[2] = ((v) >> 16) & 0xff; \ 8858787Sru ((uint8_t *)(p))[3] = ((v) >> 24) & 0xff; \ 8914343Swollman} while (0) 9014343Swollman 9158787Srustatic int ieee80211_fragment(struct ieee80211vap *, struct mbuf *, 9214343Swollman u_int hdrsize, u_int ciphdrsize, u_int mtu); 9314343Swollmanstatic void ieee80211_tx_mgt_cb(struct ieee80211_node *, void *, int); 9414343Swollman 9558787Sru#ifdef IEEE80211_DEBUG 9614343Swollman/* 9758787Sru * Decide if an outbound management frame should be 9858787Sru * printed when debugging is enabled. This filters some 9958787Sru * of the less interesting frames that come frequently 10014343Swollman * (e.g. beacons). 10158787Sru */ 10258787Srustatic __inline int 1032742Swollmandoprint(struct ieee80211vap *vap, int subtype) 1042742Swollman{ 10558787Sru switch (subtype) { 10658787Sru case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 10758787Sru return (vap->iv_opmode == IEEE80211_M_IBSS); 1082742Swollman } 1092742Swollman return 1; 1109908Swollman} 1112742Swollman#endif 11214343Swollman 11358787Sru/* 11414343Swollman * Transmit a frame to the given destination on the given VAP. 11514343Swollman * 11658787Sru * It's up to the caller to figure out the details of who this 11758787Sru * is going to and resolving the node. 11814343Swollman * 11914343Swollman * This routine takes care of queuing it for power save, 12058787Sru * A-MPDU state stuff, fast-frames state stuff, encapsulation 12143543Swollman * if required, then passing it up to the driver layer. 1222742Swollman * 1232742Swollman * This routine (for now) consumes the mbuf and frees the node 12458787Sru * reference; it ideally will return a TX status which reflects 1252742Swollman * whether the mbuf was consumed or not, so the caller can 1262742Swollman * free the mbuf (if appropriate) and the node reference (again, 1279908Swollman * if appropriate.) 1282742Swollman */ 12914343Swollmanint 13014343Swollmanieee80211_vap_pkt_send_dest(struct ieee80211vap *vap, struct mbuf *m, 13114343Swollman struct ieee80211_node *ni) 13214343Swollman{ 13314343Swollman struct ieee80211com *ic = vap->iv_ic; 13414343Swollman struct ifnet *ifp = vap->iv_ifp; 13514343Swollman int error, len, mcast; 13643543Swollman 13714343Swollman if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) && 13814343Swollman (m->m_flags & M_PWR_SAV) == 0) { 13958787Sru /* 14043543Swollman * Station in power save mode; pass the frame 1412742Swollman * to the 802.11 layer and continue. We'll get 1422742Swollman * the frame back when the time is right. 14358787Sru * XXX lose WDS vap linkage? 1442742Swollman */ 1452742Swollman if (ieee80211_pwrsave(ni, m) != 0) 1462742Swollman if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1472742Swollman ieee80211_free_node(ni); 14858787Sru 14958787Sru /* 15058787Sru * We queued it fine, so tell the upper layer 1518029Swollman * that we consumed it. 15214343Swollman */ 15314343Swollman return (0); 15414343Swollman } 15514343Swollman /* calculate priority so drivers can find the tx queue */ 15614343Swollman if (ieee80211_classify(ni, m)) { 15714343Swollman IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_OUTPUT, 15814343Swollman ni->ni_macaddr, NULL, 15958787Sru "%s", "classification failure"); 16014343Swollman vap->iv_stats.is_tx_classify++; 16114343Swollman if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 16258787Sru m_freem(m); 16358787Sru ieee80211_free_node(ni); 1642742Swollman 1652742Swollman /* XXX better status? */ 16614343Swollman return (0); 1678029Swollman } 16814343Swollman /* 1692742Swollman * Stash the node pointer. Note that we do this after 1702742Swollman * any call to ieee80211_dwds_mcast because that code 17114343Swollman * uses any existing value for rcvif to identify the 17258787Sru * interface it (might have been) received on. 1732742Swollman */ 17414343Swollman m->m_pkthdr.rcvif = (void *)ni; 17514343Swollman mcast = (m->m_flags & (M_MCAST | M_BCAST)) ? 1: 0; 17614343Swollman len = m->m_pkthdr.len; 17714343Swollman 17830711Swollman BPF_MTAP(ifp, m); /* 802.3 tx */ 17930711Swollman 18058787Sru /* 18158787Sru * Check if A-MPDU tx aggregation is setup or if we 1822742Swollman * should try to enable it. The sta must be associated 18343014Swollman * with HT and A-MPDU enabled for use. When the policy 18443014Swollman * routine decides we should enable A-MPDU we issue an 18543014Swollman * ADDBA request and wait for a reply. The frame being 18643014Swollman * encapsulated will go out w/o using A-MPDU, or possibly 1872742Swollman * it might be collected by the driver and held/retransmit. 1882742Swollman * The default ic_ampdu_enable routine handles staggering 18958787Sru * ADDBA requests in case the receiver NAK's us or we are 1902742Swollman * otherwise unable to establish a BA stream. 19119878Swollman */ 19243014Swollman if ((ni->ni_flags & IEEE80211_NODE_AMPDU_TX) && 19343014Swollman (vap->iv_flags_ht & IEEE80211_FHT_AMPDU_TX) && 1942742Swollman (m->m_flags & M_EAPOL) == 0) { 1952742Swollman int tid = WME_AC_TO_TID(M_WME_GETAC(m)); 19619878Swollman struct ieee80211_tx_ampdu *tap = &ni->ni_tx_ampdu[tid]; 19719878Swollman 1982742Swollman ieee80211_txampdu_count_packet(tap); 1992742Swollman if (IEEE80211_AMPDU_RUNNING(tap)) { 2002742Swollman /* 2012742Swollman * Operational, mark frame for aggregation. 20219878Swollman * 2032742Swollman * XXX do tx aggregation here 2042742Swollman */ 20543543Swollman m->m_flags |= M_AMPDU_MPDU; 20643543Swollman } else if (!IEEE80211_AMPDU_REQUESTED(tap) && 20743543Swollman ic->ic_ampdu_enable(ni, tap)) { 2082742Swollman /* 2092742Swollman * Not negotiated yet, request service. 21043543Swollman */ 2112742Swollman ieee80211_ampdu_request(ni, tap); 2122742Swollman /* XXX hold frame for reply? */ 2132742Swollman } 2142742Swollman } 21519878Swollman 2162742Swollman /* 21719878Swollman * XXX If we aren't doing AMPDU TX then we /could/ do 2182742Swollman * fast-frames encapsulation, however right now this 21919878Swollman * output logic doesn't handle that case. 22043014Swollman * 22143014Swollman * So we'll be limited to "fast-frames" xmit for non-11n STA 2222742Swollman * and "no fast frames" xmit for 11n STAs. 2232742Swollman * It'd be nice to eventually test fast-frames out by 2242742Swollman * gracefully falling from failing A-MPDU transmission 2252742Swollman * (driver says no, fail to negotiate it with peer) to 2262742Swollman * using fast-frames. 2272742Swollman * 2282742Swollman * Note: we can actually put A-MSDU's inside an A-MPDU, 2292742Swollman * so hopefully we can figure out how to make that particular 2302742Swollman * combination work right. 23119878Swollman */ 2322742Swollman#ifdef IEEE80211_SUPPORT_SUPERG 23319878Swollman else if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF)) { 23419878Swollman m = ieee80211_ff_check(ni, m); 23519878Swollman if (m == NULL) { 2362742Swollman /* NB: any ni ref held on stageq */ 23719878Swollman return (0); 23819878Swollman } 23919878Swollman } 2402742Swollman#endif /* IEEE80211_SUPPORT_SUPERG */ 24114343Swollman 24214343Swollman /* 24314343Swollman * Grab the TX lock - serialise the TX process from this 24419878Swollman * point (where TX state is being checked/modified) 24519878Swollman * through to driver queue. 24614343Swollman */ 24714343Swollman IEEE80211_TX_LOCK(ic); 24814343Swollman 24914343Swollman /* 25019878Swollman * XXX make the encap and transmit code a separate function 25119878Swollman * so things like the FF (and later A-MSDU) path can just call 25214343Swollman * it for flushed frames. 25319878Swollman */ 25419878Swollman if (__predict_true((vap->iv_caps & IEEE80211_C_8023ENCAP) == 0)) { 25519878Swollman /* 25614343Swollman * Encapsulate the packet in prep for transmission. 25714343Swollman */ 25814343Swollman m = ieee80211_encap(vap, ni, m); 25914343Swollman if (m == NULL) { 26019878Swollman /* NB: stat+msg handled in ieee80211_encap */ 26119878Swollman IEEE80211_TX_UNLOCK(ic); 26214343Swollman ieee80211_free_node(ni); 26319878Swollman if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 26414343Swollman return (ENOBUFS); 26519878Swollman } 26614343Swollman } 26758787Sru error = ieee80211_parent_xmitpkt(ic, m); 26858787Sru 26958787Sru /* 27014343Swollman * Unlock at this point - no need to hold it across 2712742Swollman * ieee80211_free_node() (ie, the comlock) 2722742Swollman */ 2732742Swollman IEEE80211_TX_UNLOCK(ic); 27419878Swollman if (error != 0) { 2752742Swollman /* NB: IFQ_HANDOFF reclaims mbuf */ 27619878Swollman ieee80211_free_node(ni); 27719878Swollman if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 2782742Swollman } 2792742Swollman ic->ic_lastdata = ticks; 2802742Swollman 28119878Swollman return (0); 28219878Swollman} 28343014Swollman 28458787Sru 28543014Swollman 2862742Swollman/* 2872742Swollman * Send the given mbuf through the given vap. 2882742Swollman * 2892742Swollman * This consumes the mbuf regardless of whether the transmit 2902742Swollman * was successful or not. 2912742Swollman * 2922742Swollman * This does none of the initial checks that ieee80211_start() 2932742Swollman * does (eg CAC timeout, interface wakeup) - the caller must 2942742Swollman * do this first. 2952742Swollman */ 2962742Swollmanstatic int 2972742Swollmanieee80211_start_pkt(struct ieee80211vap *vap, struct mbuf *m) 29814343Swollman{ 2992742Swollman#define IS_DWDS(vap) \ 30014343Swollman (vap->iv_opmode == IEEE80211_M_WDS && \ 30114343Swollman (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) == 0) 3022742Swollman struct ieee80211com *ic = vap->iv_ic; 30314343Swollman struct ifnet *ifp = vap->iv_ifp; 30443014Swollman struct ieee80211_node *ni; 30514343Swollman struct ether_header *eh; 30614343Swollman 30714343Swollman /* 3089908Swollman * Cancel any background scan. 3099908Swollman */ 3109908Swollman if (ic->ic_flags & IEEE80211_F_SCAN) 3119908Swollman ieee80211_cancel_anyscan(vap); 3129908Swollman /* 3139908Swollman * Find the node for the destination so we can do 3149908Swollman * things like power save and fast frames aggregation. 31520094Swollman * 31620094Swollman * NB: past this point various code assumes the first 3172742Swollman * mbuf has the 802.3 header present (and contiguous). 3182742Swollman */ 31914343Swollman ni = NULL; 3202742Swollman if (m->m_len < sizeof(struct ether_header) && 32120094Swollman (m = m_pullup(m, sizeof(struct ether_header))) == NULL) { 3222742Swollman IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 3238029Swollman "discard frame, %s\n", "m_pullup failed"); 32430711Swollman vap->iv_stats.is_tx_nobuf++; /* XXX */ 32558787Sru if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 32658787Sru return (ENOBUFS); 3272742Swollman } 32830711Swollman eh = mtod(m, struct ether_header *); 32958787Sru if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 33058787Sru if (IS_DWDS(vap)) { 33158787Sru /* 33230711Swollman * Only unicast frames from the above go out 33330711Swollman * DWDS vaps; multicast frames are handled by 3342742Swollman * dispatching the frame as it comes through 3352742Swollman * the AP vap (see below). 3362742Swollman */ 3372742Swollman IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_WDS, 3382742Swollman eh->ether_dhost, "mcast", "%s", "on DWDS"); 3392742Swollman vap->iv_stats.is_dwds_mcast++; 34019878Swollman m_freem(m); 34119878Swollman if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 34219878Swollman /* XXX better status? */ 3432742Swollman return (ENOBUFS); 3442742Swollman } 3452742Swollman if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 3462742Swollman /* 34719878Swollman * Spam DWDS vap's w/ multicast traffic. 34819878Swollman */ 3492742Swollman /* XXX only if dwds in use? */ 35058787Sru ieee80211_dwds_mcast(vap, m); 3519908Swollman } 3529908Swollman } 35319878Swollman#ifdef IEEE80211_SUPPORT_MESH 3549908Swollman if (vap->iv_opmode != IEEE80211_M_MBSS) { 3552742Swollman#endif 3562742Swollman ni = ieee80211_find_txnode(vap, eh->ether_dhost); 3572742Swollman if (ni == NULL) { 35819878Swollman /* NB: ieee80211_find_txnode does stat+msg */ 35919878Swollman if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 3602742Swollman m_freem(m); 3612742Swollman /* XXX better status? */ 3622742Swollman return (ENOBUFS); 3632742Swollman } 36458787Sru if (ni->ni_associd == 0 && 36558787Sru (ni->ni_flags & IEEE80211_NODE_ASSOCID)) { 3662742Swollman IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_OUTPUT, 36714343Swollman eh->ether_dhost, NULL, 36814343Swollman "sta not associated (type 0x%04x)", 36914343Swollman htons(eh->ether_type)); 37019878Swollman vap->iv_stats.is_tx_notassoc++; 37114343Swollman if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 37214343Swollman m_freem(m); 37314343Swollman ieee80211_free_node(ni); 37414343Swollman /* XXX better status? */ 37514343Swollman return (ENOBUFS); 37614343Swollman } 37714343Swollman#ifdef IEEE80211_SUPPORT_MESH 37819878Swollman } else { 37919878Swollman if (!IEEE80211_ADDR_EQ(eh->ether_shost, vap->iv_myaddr)) { 38014343Swollman /* 3812742Swollman * Proxy station only if configured. 3822742Swollman */ 3832742Swollman if (!ieee80211_mesh_isproxyena(vap)) { 3842742Swollman IEEE80211_DISCARD_MAC(vap, 38519878Swollman IEEE80211_MSG_OUTPUT | 3862742Swollman IEEE80211_MSG_MESH, 3872742Swollman eh->ether_dhost, NULL, 3882742Swollman "%s", "proxy not enabled"); 3892742Swollman vap->iv_stats.is_mesh_notproxy++; 39019878Swollman if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 3912742Swollman m_freem(m); 3922742Swollman /* XXX better status? */ 39358787Sru return (ENOBUFS); 39458787Sru } 39558787Sru IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 3962742Swollman "forward frame from DS SA(%6D), DA(%6D)\n", 3972742Swollman eh->ether_shost, ":", 39858787Sru eh->ether_dhost, ":"); 39958787Sru ieee80211_mesh_proxy_check(vap, eh->ether_shost); 40058787Sru } 4012742Swollman ni = ieee80211_mesh_discover(vap, eh->ether_dhost, m); 4022742Swollman if (ni == NULL) { 4032742Swollman /* 4042742Swollman * NB: ieee80211_mesh_discover holds/disposes 40519878Swollman * frame (e.g. queueing on path discovery). 4062742Swollman */ 40743014Swollman if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 40843014Swollman /* XXX better status? */ 40943014Swollman return (ENOBUFS); 41043014Swollman } 41143014Swollman } 41243014Swollman#endif 41343014Swollman 41443014Swollman /* 41543014Swollman * We've resolved the sender, so attempt to transmit it. 41643014Swollman */ 41743014Swollman 41843014Swollman if (vap->iv_state == IEEE80211_S_SLEEP) { 41943014Swollman /* 42043014Swollman * In power save; queue frame and then wakeup device 42143014Swollman * for transmit. 42243014Swollman */ 42343014Swollman ic->ic_lastdata = ticks; 42443014Swollman if (ieee80211_pwrsave(ni, m) != 0) 42543014Swollman if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 42643014Swollman ieee80211_free_node(ni); 42743014Swollman ieee80211_new_state(vap, IEEE80211_S_RUN, 0); 42843014Swollman return (0); 42943014Swollman } 43043014Swollman 43143014Swollman if (ieee80211_vap_pkt_send_dest(vap, m, ni) != 0) 43243014Swollman return (ENOBUFS); 43343014Swollman return (0); 43443014Swollman#undef IS_DWDS 43543014Swollman} 43643014Swollman 43743014Swollman/* 43843014Swollman * Start method for vap's. All packets from the stack come 43943014Swollman * through here. We handle common processing of the packets 4402742Swollman * before dispatching them to the underlying device. 4412742Swollman * 44219878Swollman * if_transmit() requires that the mbuf be consumed by this call 44319878Swollman * regardless of the return condition. 44419878Swollman */ 44520094Swollmanint 44620094Swollmanieee80211_vap_transmit(struct ifnet *ifp, struct mbuf *m) 44720094Swollman{ 4482742Swollman struct ieee80211vap *vap = ifp->if_softc; 4492742Swollman struct ieee80211com *ic = vap->iv_ic; 45019878Swollman 4512742Swollman /* 4522742Swollman * No data frames go out unless we're running. 4532742Swollman * Note in particular this covers CAC and CSA 4542742Swollman * states (though maybe we should check muting 45519878Swollman * for CSA). 4562742Swollman */ 4572742Swollman if (vap->iv_state != IEEE80211_S_RUN && 4582742Swollman vap->iv_state != IEEE80211_S_SLEEP) { 4592742Swollman IEEE80211_LOCK(ic); 4602742Swollman /* re-check under the com lock to avoid races */ 4612742Swollman if (vap->iv_state != IEEE80211_S_RUN && 4622742Swollman vap->iv_state != IEEE80211_S_SLEEP) { 4632742Swollman IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 4642742Swollman "%s: ignore queue, in %s state\n", 46558787Sru __func__, ieee80211_state_name[vap->iv_state]); 4662742Swollman vap->iv_stats.is_tx_badstate++; 46758787Sru IEEE80211_UNLOCK(ic); 46858787Sru ifp->if_drv_flags |= IFF_DRV_OACTIVE; 4692742Swollman m_freem(m); 47058787Sru if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 47120094Swollman return (ENETDOWN); 47220094Swollman } 47320094Swollman IEEE80211_UNLOCK(ic); 47420094Swollman } 47520094Swollman 47620094Swollman /* 47720094Swollman * Sanitize mbuf flags for net80211 use. We cannot 47820094Swollman * clear M_PWR_SAV or M_MORE_DATA because these may 4792742Swollman * be set for frames that are re-submitted from the 4802742Swollman * power save queue. 4812742Swollman * 4822742Swollman * NB: This must be done before ieee80211_classify as 4832742Swollman * it marks EAPOL in frames with M_EAPOL. 48458787Sru */ 4852742Swollman m->m_flags &= ~(M_80211_TX - M_PWR_SAV - M_MORE_DATA); 4862742Swollman 4872742Swollman /* 4882742Swollman * Bump to the packet transmission path. 4892742Swollman * The mbuf will be consumed here. 4902742Swollman */ 4912742Swollman return (ieee80211_start_pkt(vap, m)); 4922742Swollman} 4932742Swollman 4942742Swollmanvoid 49519878Swollmanieee80211_vap_qflush(struct ifnet *ifp) 4962742Swollman{ 4972742Swollman 49819878Swollman /* Empty for now */ 4992742Swollman} 50014343Swollman 50158787Sru/* 5022742Swollman * 802.11 raw output routine. 50314343Swollman * 5049908Swollman * XXX TODO: this (and other send routines) should correctly 5052742Swollman * XXX keep the pwr mgmt bit set if it decides to call into the 5062742Swollman * XXX driver to send a frame whilst the state is SLEEP. 5072742Swollman * 5082742Swollman * Otherwise the peer may decide that we're awake and flood us 5092742Swollman * with traffic we are still too asleep to receive! 51058787Sru */ 51158787Sruint 51258787Sruieee80211_raw_output(struct ieee80211vap *vap, struct ieee80211_node *ni, 51358787Sru struct mbuf *m, const struct ieee80211_bpf_params *params) 51419878Swollman{ 5152742Swollman struct ieee80211com *ic = vap->iv_ic; 5162742Swollman int error; 5172742Swollman 5182742Swollman /* 5192742Swollman * Set node - the caller has taken a reference, so ensure 5202742Swollman * that the mbuf has the same node value that 5212742Swollman * it would if it were going via the normal path. 5222742Swollman */ 5232742Swollman m->m_pkthdr.rcvif = (void *)ni; 5242742Swollman 5252742Swollman /* 5262742Swollman * Attempt to add bpf transmit parameters. 5272742Swollman * 5282742Swollman * For now it's ok to fail; the raw_xmit api still takes 5292742Swollman * them as an option. 5302742Swollman * 5312742Swollman * Later on when ic_raw_xmit() has params removed, 5322742Swollman * they'll have to be added - so fail the transmit if 5332742Swollman * they can't be. 5342742Swollman */ 5352742Swollman if (params) 5362742Swollman (void) ieee80211_add_xmit_params(m, params); 5372742Swollman 53814343Swollman error = ic->ic_raw_xmit(ni, m, params); 5399908Swollman if (error) 5409908Swollman if_inc_counter(vap->iv_ifp, IFCOUNTER_OERRORS, 1); 5419908Swollman return (error); 5429908Swollman} 5439908Swollman 54414343Swollman/* 5452742Swollman * 802.11 output routine. This is (currently) used only to 54643014Swollman * connect bpf write calls to the 802.11 layer for injecting 54743014Swollman * raw 802.11 frames. 54843014Swollman */ 54943014Swollmanint 55043014Swollmanieee80211_output(struct ifnet *ifp, struct mbuf *m, 55143014Swollman const struct sockaddr *dst, struct route *ro) 55243014Swollman{ 55343014Swollman#define senderr(e) do { error = (e); goto bad;} while (0) 55443014Swollman struct ieee80211_node *ni = NULL; 55543014Swollman struct ieee80211vap *vap; 55643014Swollman struct ieee80211_frame *wh; 55758787Sru struct ieee80211com *ic = NULL; 55843014Swollman int error; 55943014Swollman int ret; 56043014Swollman 56143014Swollman if (ifp->if_drv_flags & IFF_DRV_OACTIVE) { 56243014Swollman /* 56343014Swollman * Short-circuit requests if the vap is marked OACTIVE 56443014Swollman * as this can happen because a packet came down through 5659908Swollman * ieee80211_start before the vap entered RUN state in 5669908Swollman * which case it's ok to just drop the frame. This 56719878Swollman * should not be necessary but callers of if_output don't 5682742Swollman * check OACTIVE. 5692742Swollman */ 5702742Swollman senderr(ENETDOWN); 5712742Swollman } 5729908Swollman vap = ifp->if_softc; 5732742Swollman ic = vap->iv_ic; 57419878Swollman /* 5752742Swollman * Hand to the 802.3 code if not tagged as 5762742Swollman * a raw 802.11 frame. 5772742Swollman */ 5789908Swollman if (dst->sa_family != AF_IEEE80211) 5792742Swollman return vap->iv_output(ifp, m, dst, ro); 58019878Swollman#ifdef MAC 5812742Swollman error = mac_ifnet_check_transmit(ifp, m); 5822742Swollman if (error) 5832742Swollman senderr(error); 5842742Swollman#endif 5852742Swollman if (ifp->if_flags & IFF_MONITOR) 5862742Swollman senderr(ENETDOWN); 5872742Swollman if (!IFNET_IS_UP_RUNNING(ifp)) 5882742Swollman senderr(ENETDOWN); 5892742Swollman if (vap->iv_state == IEEE80211_S_CAC) { 5902742Swollman IEEE80211_DPRINTF(vap, 5912742Swollman IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH, 5922742Swollman "block %s frame in CAC state\n", "raw data"); 5932742Swollman vap->iv_stats.is_tx_badstate++; 5942742Swollman senderr(EIO); /* XXX */ 59519878Swollman } else if (vap->iv_state == IEEE80211_S_SCAN) 5962742Swollman senderr(EIO); 5972742Swollman /* XXX bypass bridge, pfil, carp, etc. */ 5982742Swollman 59919878Swollman if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_ack)) 6002742Swollman senderr(EIO); /* XXX */ 6012742Swollman wh = mtod(m, struct ieee80211_frame *); 6022742Swollman if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 6032742Swollman IEEE80211_FC0_VERSION_0) 6042742Swollman senderr(EIO); /* XXX */ 6052742Swollman 60619878Swollman /* locate destination node */ 6072742Swollman switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) { 6082742Swollman case IEEE80211_FC1_DIR_NODS: 6092742Swollman case IEEE80211_FC1_DIR_FROMDS: 61058787Sru ni = ieee80211_find_txnode(vap, wh->i_addr1); 61158787Sru break; 61258787Sru case IEEE80211_FC1_DIR_TODS: 61358787Sru case IEEE80211_FC1_DIR_DSTODS: 61458787Sru if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) 6159908Swollman senderr(EIO); /* XXX */ 61619878Swollman ni = ieee80211_find_txnode(vap, wh->i_addr3); 6172742Swollman break; 6182742Swollman default: 6192742Swollman senderr(EIO); /* XXX */ 6202742Swollman } 6212742Swollman if (ni == NULL) { 6222742Swollman /* 6232742Swollman * Permit packets w/ bpf params through regardless 6242742Swollman * (see below about sa_len). 6252742Swollman */ 6262742Swollman if (dst->sa_len == 0) 62719878Swollman senderr(EHOSTUNREACH); 6282742Swollman ni = ieee80211_ref_node(vap->iv_bss); 6292742Swollman } 6302742Swollman 63119878Swollman /* 6322742Swollman * Sanitize mbuf for net80211 flags leaked from above. 6332742Swollman * 6342742Swollman * NB: This must be done before ieee80211_classify as 6352742Swollman * it marks EAPOL in frames with M_EAPOL. 63619878Swollman */ 6372742Swollman m->m_flags &= ~M_80211_TX; 6382742Swollman 6392742Swollman /* calculate priority so drivers can find the tx queue */ 6402742Swollman /* XXX assumes an 802.3 frame */ 64119878Swollman if (ieee80211_classify(ni, m)) 6422742Swollman senderr(EIO); /* XXX */ 6432742Swollman 6442742Swollman if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1); 6452742Swollman IEEE80211_NODE_STAT(ni, tx_data); 6462742Swollman if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 6472742Swollman IEEE80211_NODE_STAT(ni, tx_mcast); 6482742Swollman m->m_flags |= M_MCAST; 64919878Swollman } else 6502742Swollman IEEE80211_NODE_STAT(ni, tx_ucast); 6512742Swollman /* NB: ieee80211_encap does not include 802.11 header */ 6529908Swollman IEEE80211_NODE_STAT_ADD(ni, tx_bytes, m->m_pkthdr.len); 6532742Swollman 65419878Swollman IEEE80211_TX_LOCK(ic); 6552742Swollman 6562742Swollman /* 6572742Swollman * NB: DLT_IEEE802_11_RADIO identifies the parameters are 6582742Swollman * present by setting the sa_len field of the sockaddr (yes, 6592742Swollman * this is a hack). 6602742Swollman * NB: we assume sa_data is suitably aligned to cast. 6612742Swollman */ 6622742Swollman ret = ieee80211_raw_output(vap, ni, m, 6632742Swollman (const struct ieee80211_bpf_params *)(dst->sa_len ? 6642742Swollman dst->sa_data : NULL)); 6652742Swollman IEEE80211_TX_UNLOCK(ic); 6662742Swollman return (ret); 6672742Swollmanbad: 6682742Swollman if (m != NULL) 6692742Swollman m_freem(m); 6702742Swollman if (ni != NULL) 6712742Swollman ieee80211_free_node(ni); 67219878Swollman if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 6732742Swollman return error; 6742742Swollman#undef senderr 6752742Swollman} 6762742Swollman 6772742Swollman/* 6782742Swollman * Set the direction field and address fields of an outgoing 6792742Swollman * frame. Note this should be called early on in constructing 6809908Swollman * a frame as it sets i_fc[1]; other bits can then be or'd in. 6812742Swollman */ 68219878Swollmanvoid 6832742Swollmanieee80211_send_setup( 6842742Swollman struct ieee80211_node *ni, 6852742Swollman struct mbuf *m, 6862742Swollman int type, int tid, 68719878Swollman const uint8_t sa[IEEE80211_ADDR_LEN], 6882742Swollman const uint8_t da[IEEE80211_ADDR_LEN], 6892742Swollman const uint8_t bssid[IEEE80211_ADDR_LEN]) 6902742Swollman{ 6912742Swollman#define WH4(wh) ((struct ieee80211_frame_addr4 *)wh) 6922742Swollman struct ieee80211vap *vap = ni->ni_vap; 6932742Swollman struct ieee80211_tx_ampdu *tap; 6942742Swollman struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *); 6952742Swollman ieee80211_seq seqno; 6962742Swollman 6972742Swollman IEEE80211_TX_LOCK_ASSERT(ni->ni_ic); 69819878Swollman 6992742Swollman wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | type; 7002742Swollman if ((type & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_DATA) { 7012742Swollman switch (vap->iv_opmode) { 7022742Swollman case IEEE80211_M_STA: 70319878Swollman wh->i_fc[1] = IEEE80211_FC1_DIR_TODS; 7042742Swollman IEEE80211_ADDR_COPY(wh->i_addr1, bssid); 7052742Swollman IEEE80211_ADDR_COPY(wh->i_addr2, sa); 7062742Swollman IEEE80211_ADDR_COPY(wh->i_addr3, da); 7072742Swollman break; 7082742Swollman case IEEE80211_M_IBSS: 70919878Swollman case IEEE80211_M_AHDEMO: 7102742Swollman wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 7112742Swollman IEEE80211_ADDR_COPY(wh->i_addr1, da); 7122742Swollman IEEE80211_ADDR_COPY(wh->i_addr2, sa); 7132742Swollman IEEE80211_ADDR_COPY(wh->i_addr3, bssid); 71419878Swollman break; 7152742Swollman case IEEE80211_M_HOSTAP: 7162742Swollman wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS; 7172742Swollman IEEE80211_ADDR_COPY(wh->i_addr1, da); 7182742Swollman IEEE80211_ADDR_COPY(wh->i_addr2, bssid); 7199908Swollman IEEE80211_ADDR_COPY(wh->i_addr3, sa); 7209908Swollman break; 7219908Swollman case IEEE80211_M_WDS: 7229908Swollman wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS; 7232742Swollman IEEE80211_ADDR_COPY(wh->i_addr1, da); 7249908Swollman IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); 7259908Swollman IEEE80211_ADDR_COPY(wh->i_addr3, da); 72658787Sru IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, sa); 72758787Sru break; 7282742Swollman case IEEE80211_M_MBSS: 7292742Swollman#ifdef IEEE80211_SUPPORT_MESH 7302742Swollman if (IEEE80211_IS_MULTICAST(da)) { 73119878Swollman wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS; 7322742Swollman /* XXX next hop */ 7332742Swollman IEEE80211_ADDR_COPY(wh->i_addr1, da); 7342742Swollman IEEE80211_ADDR_COPY(wh->i_addr2, 7352742Swollman vap->iv_myaddr); 73658787Sru } else { 73758787Sru wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS; 73858787Sru IEEE80211_ADDR_COPY(wh->i_addr1, da); 73958787Sru IEEE80211_ADDR_COPY(wh->i_addr2, 74058787Sru vap->iv_myaddr); 74158787Sru IEEE80211_ADDR_COPY(wh->i_addr3, da); 74258787Sru IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, sa); 74364499Swollman } 74464499Swollman#endif 74564499Swollman break; 7469908Swollman case IEEE80211_M_MONITOR: /* NB: to quiet compiler */ 7472742Swollman break; 74858787Sru } 74958787Sru } else { 7502742Swollman wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 7512742Swollman IEEE80211_ADDR_COPY(wh->i_addr1, da); 7522742Swollman IEEE80211_ADDR_COPY(wh->i_addr2, sa); 7539908Swollman#ifdef IEEE80211_SUPPORT_MESH 7542742Swollman if (vap->iv_opmode == IEEE80211_M_MBSS) 7552742Swollman IEEE80211_ADDR_COPY(wh->i_addr3, sa); 7562742Swollman else 7572742Swollman#endif 7582742Swollman IEEE80211_ADDR_COPY(wh->i_addr3, bssid); 7592742Swollman } 7602742Swollman *(uint16_t *)&wh->i_dur[0] = 0; 7612742Swollman 7622742Swollman tap = &ni->ni_tx_ampdu[tid]; 7632742Swollman if (tid != IEEE80211_NONQOS_TID && IEEE80211_AMPDU_RUNNING(tap)) 7642742Swollman m->m_flags |= M_AMPDU_MPDU; 7652742Swollman else { 76658787Sru if (IEEE80211_HAS_SEQ(type & IEEE80211_FC0_TYPE_MASK, 76758787Sru type & IEEE80211_FC0_SUBTYPE_MASK)) 76858787Sru seqno = ni->ni_txseqs[tid]++; 76958787Sru else 77058787Sru seqno = 0; 77158787Sru 77258787Sru *(uint16_t *)&wh->i_seq[0] = 77358787Sru htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); 77458787Sru M_SEQNO_SET(m, seqno); 77558787Sru } 7762742Swollman 77758787Sru if (IEEE80211_IS_MULTICAST(wh->i_addr1)) 77858787Sru m->m_flags |= M_MCAST; 77958787Sru#undef WH4 78058787Sru} 78158787Sru 78258787Sru/* 78358787Sru * Send a management frame to the specified node. The node pointer 7842742Swollman * must have a reference as the pointer will be passed to the driver 78558787Sru * and potentially held for a long time. If the frame is successfully 78658787Sru * dispatched to the driver, then it is responsible for freeing the 78758787Sru * reference (and potentially free'ing up any associated storage); 78858787Sru * otherwise deal with reclaiming any reference (on error). 78958787Sru */ 79058787Sruint 79158787Sruieee80211_mgmt_output(struct ieee80211_node *ni, struct mbuf *m, int type, 79258787Sru struct ieee80211_bpf_params *params) 79358787Sru{ 79458787Sru struct ieee80211vap *vap = ni->ni_vap; 79558787Sru struct ieee80211com *ic = ni->ni_ic; 79658787Sru struct ieee80211_frame *wh; 79758787Sru int ret; 79858787Sru 79958787Sru KASSERT(ni != NULL, ("null node")); 80058787Sru 80158787Sru if (vap->iv_state == IEEE80211_S_CAC) { 80258787Sru IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH, 80358787Sru ni, "block %s frame in CAC state", 80458787Sru ieee80211_mgt_subtype_name[ 80558787Sru (type & IEEE80211_FC0_SUBTYPE_MASK) >> 80658787Sru IEEE80211_FC0_SUBTYPE_SHIFT]); 80758787Sru vap->iv_stats.is_tx_badstate++; 80858787Sru ieee80211_free_node(ni); 80958787Sru m_freem(m); 81058787Sru return EIO; /* XXX */ 81158787Sru } 81258787Sru 81358787Sru M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); 81458787Sru if (m == NULL) { 81558787Sru ieee80211_free_node(ni); 81658787Sru return ENOMEM; 81758787Sru } 81858787Sru 81958787Sru IEEE80211_TX_LOCK(ic); 82058787Sru 8212742Swollman wh = mtod(m, struct ieee80211_frame *); 82243543Swollman ieee80211_send_setup(ni, m, 82343543Swollman IEEE80211_FC0_TYPE_MGT | type, IEEE80211_NONQOS_TID, 82458787Sru vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid); 82543543Swollman if (params->ibp_flags & IEEE80211_BPF_CRYPTO) { 8269908Swollman IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr1, 8272742Swollman "encrypting frame (%s)", __func__); 82819878Swollman wh->i_fc[1] |= IEEE80211_FC1_PROTECTED; 8292742Swollman } 8302742Swollman m->m_flags |= M_ENCAP; /* mark encapsulated */ 83119878Swollman 8322742Swollman KASSERT(type != IEEE80211_FC0_SUBTYPE_PROBE_RESP, ("probe response?")); 8332742Swollman M_WME_SETAC(m, params->ibp_pri); 8342742Swollman 83543014Swollman#ifdef IEEE80211_DEBUG 8362742Swollman /* avoid printing too many frames */ 8372742Swollman if ((ieee80211_msg_debug(vap) && doprint(vap, type)) || 8382742Swollman ieee80211_msg_dumppkts(vap)) { 8392742Swollman printf("[%s] send %s on channel %u\n", 8402742Swollman ether_sprintf(wh->i_addr1), 8412742Swollman ieee80211_mgt_subtype_name[ 8422742Swollman (type & IEEE80211_FC0_SUBTYPE_MASK) >> 8432742Swollman IEEE80211_FC0_SUBTYPE_SHIFT], 8442742Swollman ieee80211_chan2ieee(ic, ic->ic_curchan)); 8452742Swollman } 8462742Swollman#endif 8479908Swollman IEEE80211_NODE_STAT(ni, tx_mgmt); 8482742Swollman 84919878Swollman ret = ieee80211_raw_output(vap, ni, m, params); 8502742Swollman IEEE80211_TX_UNLOCK(ic); 8512742Swollman return (ret); 8522742Swollman} 8532742Swollman 8542742Swollman/* 85558787Sru * Send a null data frame to the specified node. If the station 85658787Sru * is setup for QoS then a QoS Null Data frame is constructed. 85758787Sru * If this is a WDS station then a 4-address frame is constructed. 85858787Sru * 85958787Sru * NB: the caller is assumed to have setup a node reference 86058787Sru * for use; this is necessary to deal with a race condition 86158787Sru * when probing for inactive stations. Like ieee80211_mgmt_output 86258787Sru * we must cleanup any node reference on error; however we 86358787Sru * can safely just unref it as we know it will never be the 86458787Sru * last reference to the node. 86514343Swollman */ 86658787Sruint 86758787Sruieee80211_send_nulldata(struct ieee80211_node *ni) 86858787Sru{ 8692742Swollman struct ieee80211vap *vap = ni->ni_vap; 8702742Swollman struct ieee80211com *ic = ni->ni_ic; 87158787Sru struct mbuf *m; 8722742Swollman struct ieee80211_frame *wh; 87319878Swollman int hdrlen; 8742742Swollman uint8_t *frm; 8752742Swollman int ret; 8762742Swollman 8772742Swollman if (vap->iv_state == IEEE80211_S_CAC) { 8782742Swollman IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH, 87919878Swollman ni, "block %s frame in CAC state", "null data"); 8802742Swollman ieee80211_unref_node(&ni); 8812742Swollman vap->iv_stats.is_tx_badstate++; 8822742Swollman return EIO; /* XXX */ 8832742Swollman } 8842742Swollman 8852742Swollman if (ni->ni_flags & (IEEE80211_NODE_QOS|IEEE80211_NODE_HT)) 8862742Swollman hdrlen = sizeof(struct ieee80211_qosframe); 8872742Swollman else 8882742Swollman hdrlen = sizeof(struct ieee80211_frame); 8892742Swollman /* NB: only WDS vap's get 4-address frames */ 8902742Swollman if (vap->iv_opmode == IEEE80211_M_WDS) 8912742Swollman hdrlen += IEEE80211_ADDR_LEN; 8922742Swollman if (ic->ic_flags & IEEE80211_F_DATAPAD) 89319878Swollman hdrlen = roundup(hdrlen, sizeof(uint32_t)); 8942742Swollman 8952742Swollman m = ieee80211_getmgtframe(&frm, ic->ic_headroom + hdrlen, 0); 8962742Swollman if (m == NULL) { 89714343Swollman /* XXX debug msg */ 89814343Swollman ieee80211_unref_node(&ni); 89914343Swollman vap->iv_stats.is_tx_nobuf++; 90014343Swollman return ENOMEM; 90114343Swollman } 90214343Swollman KASSERT(M_LEADINGSPACE(m) >= hdrlen, 90314343Swollman ("leading space %zd", M_LEADINGSPACE(m))); 90458787Sru M_PREPEND(m, hdrlen, M_NOWAIT); 90558787Sru if (m == NULL) { 90658787Sru /* NB: cannot happen */ 90720094Swollman ieee80211_free_node(ni); 90858787Sru return ENOMEM; 90914343Swollman } 9102742Swollman 9112742Swollman IEEE80211_TX_LOCK(ic); 91258787Sru 9132742Swollman wh = mtod(m, struct ieee80211_frame *); /* NB: a little lie */ 9142742Swollman if (ni->ni_flags & IEEE80211_NODE_QOS) { 91558787Sru const int tid = WME_AC_TO_TID(WME_AC_BE); 91658787Sru uint8_t *qos; 91758787Sru 9182742Swollman ieee80211_send_setup(ni, m, 91943543Swollman IEEE80211_FC0_TYPE_DATA | IEEE80211_FC0_SUBTYPE_QOS_NULL, 92043543Swollman tid, vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid); 92143543Swollman 92243543Swollman if (vap->iv_opmode == IEEE80211_M_WDS) 92343543Swollman qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos; 92458787Sru else 92558787Sru qos = ((struct ieee80211_qosframe *) wh)->i_qos; 92658787Sru qos[0] = tid & IEEE80211_QOS_TID; 92743543Swollman if (ic->ic_wme.wme_wmeChanParams.cap_wmeParams[WME_AC_BE].wmep_noackPolicy) 92843543Swollman qos[0] |= IEEE80211_QOS_ACKPOLICY_NOACK; 92943543Swollman qos[1] = 0; 93043543Swollman } else { 93143543Swollman ieee80211_send_setup(ni, m, 93243543Swollman IEEE80211_FC0_TYPE_DATA | IEEE80211_FC0_SUBTYPE_NODATA, 93343543Swollman IEEE80211_NONQOS_TID, 93458787Sru vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid); 93514343Swollman } 93614343Swollman if (vap->iv_opmode != IEEE80211_M_WDS) { 93714343Swollman /* NB: power management bit is never sent by an AP */ 93814343Swollman if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) && 93958787Sru vap->iv_opmode != IEEE80211_M_HOSTAP) 94017200Swollman wh->i_fc[1] |= IEEE80211_FC1_PWR_MGT; 94117200Swollman } 94217200Swollman m->m_len = m->m_pkthdr.len = hdrlen; 94317200Swollman m->m_flags |= M_ENCAP; /* mark encapsulated */ 94417200Swollman 94517200Swollman M_WME_SETAC(m, WME_AC_BE); 94617200Swollman 94758787Sru IEEE80211_NODE_STAT(ni, tx_data); 9482742Swollman 9492742Swollman IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS, ni, 9502742Swollman "send %snull data frame on channel %u, pwr mgt %s", 9512742Swollman ni->ni_flags & IEEE80211_NODE_QOS ? "QoS " : "", 95219878Swollman ieee80211_chan2ieee(ic, ic->ic_curchan), 9532742Swollman wh->i_fc[1] & IEEE80211_FC1_PWR_MGT ? "ena" : "dis"); 9542742Swollman 9552742Swollman ret = ieee80211_raw_output(vap, ni, m, NULL); 95658787Sru IEEE80211_TX_UNLOCK(ic); 95714343Swollman return (ret); 9582742Swollman} 95958787Sru 9602742Swollman/* 9612742Swollman * Assign priority to a frame based on any vlan tag assigned 9622742Swollman * to the station and/or any Diffserv setting in an IP header. 96314343Swollman * Finally, if an ACM policy is setup (in station mode) it's 96458787Sru * applied. 96517200Swollman */ 96617200Swollmanint 96717200Swollmanieee80211_classify(struct ieee80211_node *ni, struct mbuf *m) 96817200Swollman{ 96917200Swollman const struct ether_header *eh = mtod(m, struct ether_header *); 97017200Swollman int v_wme_ac, d_wme_ac, ac; 97158787Sru 97217200Swollman /* 97317200Swollman * Always promote PAE/EAPOL frames to high priority. 97458787Sru */ 97558787Sru if (eh->ether_type == htons(ETHERTYPE_PAE)) { 97658787Sru /* NB: mark so others don't need to check header */ 97758787Sru m->m_flags |= M_EAPOL; 97858787Sru ac = WME_AC_VO; 97958787Sru goto done; 98058787Sru } 98158787Sru /* 98258787Sru * Non-qos traffic goes to BE. 98358787Sru */ 98458787Sru if ((ni->ni_flags & IEEE80211_NODE_QOS) == 0) { 98558787Sru ac = WME_AC_BE; 98658787Sru goto done; 98758787Sru } 98858787Sru 98958787Sru /* 99058787Sru * If node has a vlan tag then all traffic 99158787Sru * to it must have a matching tag. 99258787Sru */ 99358787Sru v_wme_ac = 0; 99458787Sru if (ni->ni_vlan != 0) { 99558787Sru if ((m->m_flags & M_VLANTAG) == 0) { 99658787Sru IEEE80211_NODE_STAT(ni, tx_novlantag); 99758787Sru return 1; 99858787Sru } 99958787Sru if (EVL_VLANOFTAG(m->m_pkthdr.ether_vtag) != 100058787Sru EVL_VLANOFTAG(ni->ni_vlan)) { 100158787Sru IEEE80211_NODE_STAT(ni, tx_vlanmismatch); 100258787Sru return 1; 100358787Sru } 100458787Sru /* map vlan priority to AC */ 100558787Sru v_wme_ac = TID_TO_WME_AC(EVL_PRIOFTAG(ni->ni_vlan)); 100658787Sru } 100714343Swollman 100814343Swollman /* XXX m_copydata may be too slow for fast path */ 100958787Sru#ifdef INET 101058787Sru if (eh->ether_type == htons(ETHERTYPE_IP)) { 101114343Swollman uint8_t tos; 101214343Swollman /* 101314343Swollman * IP frame, map the DSCP bits from the TOS field. 101417200Swollman */ 101558787Sru /* NB: ip header may not be in first mbuf */ 101617200Swollman m_copydata(m, sizeof(struct ether_header) + 101717200Swollman offsetof(struct ip, ip_tos), sizeof(tos), &tos); 101817200Swollman tos >>= 5; /* NB: ECN + low 3 bits of DSCP */ 101917200Swollman d_wme_ac = TID_TO_WME_AC(tos); 102017200Swollman } else { 102117200Swollman#endif /* INET */ 102258787Sru#ifdef INET6 102358787Sru if (eh->ether_type == htons(ETHERTYPE_IPV6)) { 102458787Sru uint32_t flow; 102558787Sru uint8_t tos; 102658787Sru /* 102758787Sru * IPv6 frame, map the DSCP bits from the traffic class field. 102858787Sru */ 102958787Sru m_copydata(m, sizeof(struct ether_header) + 103058787Sru offsetof(struct ip6_hdr, ip6_flow), sizeof(flow), 103158787Sru (caddr_t) &flow); 103258787Sru tos = (uint8_t)(ntohl(flow) >> 20); 103358787Sru tos >>= 5; /* NB: ECN + low 3 bits of DSCP */ 103458787Sru d_wme_ac = TID_TO_WME_AC(tos); 103558787Sru } else { 103658787Sru#endif /* INET6 */ 103758787Sru d_wme_ac = WME_AC_BE; 103858787Sru#ifdef INET6 103958787Sru } 104058787Sru#endif 104158787Sru#ifdef INET 104258787Sru } 104358787Sru#endif 104458787Sru /* 104558787Sru * Use highest priority AC. 104658787Sru */ 104758787Sru if (v_wme_ac > d_wme_ac) 104858787Sru ac = v_wme_ac; 104958787Sru else 105058787Sru ac = d_wme_ac; 105158787Sru 105258787Sru /* 105358787Sru * Apply ACM policy. 105458787Sru */ 105558787Sru if (ni->ni_vap->iv_opmode == IEEE80211_M_STA) { 105658787Sru static const int acmap[4] = { 105758787Sru WME_AC_BK, /* WME_AC_BE */ 105858787Sru WME_AC_BK, /* WME_AC_BK */ 105958787Sru WME_AC_BE, /* WME_AC_VI */ 106058787Sru WME_AC_VI, /* WME_AC_VO */ 106158787Sru }; 106258787Sru struct ieee80211com *ic = ni->ni_ic; 106358787Sru 106458787Sru while (ac != WME_AC_BK && 106558787Sru ic->ic_wme.wme_wmeBssChanParams.cap_wmeParams[ac].wmep_acm) 106658787Sru ac = acmap[ac]; 106758787Sru } 106858787Srudone: 106958787Sru M_WME_SETAC(m, ac); 107058787Sru return 0; 107158787Sru} 107258787Sru 107358787Sru/* 107458787Sru * Insure there is sufficient contiguous space to encapsulate the 107558787Sru * 802.11 data frame. If room isn't already there, arrange for it. 107658787Sru * Drivers and cipher modules assume we have done the necessary work 107758787Sru * and fail rudely if they don't find the space they need. 107858787Sru */ 107958787Srustruct mbuf * 108058787Sruieee80211_mbuf_adjust(struct ieee80211vap *vap, int hdrsize, 108158787Sru struct ieee80211_key *key, struct mbuf *m) 108258787Sru{ 108358787Sru#define TO_BE_RECLAIMED (sizeof(struct ether_header) - sizeof(struct llc)) 108458787Sru int needed_space = vap->iv_ic->ic_headroom + hdrsize; 108558787Sru 108658787Sru if (key != NULL) { 108758787Sru /* XXX belongs in crypto code? */ 108858787Sru needed_space += key->wk_cipher->ic_header; 108958787Sru /* XXX frags */ 109058787Sru /* 109158787Sru * When crypto is being done in the host we must insure 109258787Sru * the data are writable for the cipher routines; clone 109358787Sru * a writable mbuf chain. 109458787Sru * XXX handle SWMIC specially 109558787Sru */ 109658787Sru if (key->wk_flags & (IEEE80211_KEY_SWENCRYPT|IEEE80211_KEY_SWENMIC)) { 109758787Sru m = m_unshare(m, M_NOWAIT); 109858787Sru if (m == NULL) { 109958787Sru IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 110058787Sru "%s: cannot get writable mbuf\n", __func__); 110158787Sru vap->iv_stats.is_tx_nobuf++; /* XXX new stat */ 110258787Sru return NULL; 110358787Sru } 110458787Sru } 110558787Sru } 110658787Sru /* 110758787Sru * We know we are called just before stripping an Ethernet 110858787Sru * header and prepending an LLC header. This means we know 110958787Sru * there will be 111058787Sru * sizeof(struct ether_header) - sizeof(struct llc) 111158787Sru * bytes recovered to which we need additional space for the 111258787Sru * 802.11 header and any crypto header. 1113 */ 1114 /* XXX check trailing space and copy instead? */ 1115 if (M_LEADINGSPACE(m) < needed_space - TO_BE_RECLAIMED) { 1116 struct mbuf *n = m_gethdr(M_NOWAIT, m->m_type); 1117 if (n == NULL) { 1118 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 1119 "%s: cannot expand storage\n", __func__); 1120 vap->iv_stats.is_tx_nobuf++; 1121 m_freem(m); 1122 return NULL; 1123 } 1124 KASSERT(needed_space <= MHLEN, 1125 ("not enough room, need %u got %d\n", needed_space, MHLEN)); 1126 /* 1127 * Setup new mbuf to have leading space to prepend the 1128 * 802.11 header and any crypto header bits that are 1129 * required (the latter are added when the driver calls 1130 * back to ieee80211_crypto_encap to do crypto encapsulation). 1131 */ 1132 /* NB: must be first 'cuz it clobbers m_data */ 1133 m_move_pkthdr(n, m); 1134 n->m_len = 0; /* NB: m_gethdr does not set */ 1135 n->m_data += needed_space; 1136 /* 1137 * Pull up Ethernet header to create the expected layout. 1138 * We could use m_pullup but that's overkill (i.e. we don't 1139 * need the actual data) and it cannot fail so do it inline 1140 * for speed. 1141 */ 1142 /* NB: struct ether_header is known to be contiguous */ 1143 n->m_len += sizeof(struct ether_header); 1144 m->m_len -= sizeof(struct ether_header); 1145 m->m_data += sizeof(struct ether_header); 1146 /* 1147 * Replace the head of the chain. 1148 */ 1149 n->m_next = m; 1150 m = n; 1151 } 1152 return m; 1153#undef TO_BE_RECLAIMED 1154} 1155 1156/* 1157 * Return the transmit key to use in sending a unicast frame. 1158 * If a unicast key is set we use that. When no unicast key is set 1159 * we fall back to the default transmit key. 1160 */ 1161static __inline struct ieee80211_key * 1162ieee80211_crypto_getucastkey(struct ieee80211vap *vap, 1163 struct ieee80211_node *ni) 1164{ 1165 if (IEEE80211_KEY_UNDEFINED(&ni->ni_ucastkey)) { 1166 if (vap->iv_def_txkey == IEEE80211_KEYIX_NONE || 1167 IEEE80211_KEY_UNDEFINED(&vap->iv_nw_keys[vap->iv_def_txkey])) 1168 return NULL; 1169 return &vap->iv_nw_keys[vap->iv_def_txkey]; 1170 } else { 1171 return &ni->ni_ucastkey; 1172 } 1173} 1174 1175/* 1176 * Return the transmit key to use in sending a multicast frame. 1177 * Multicast traffic always uses the group key which is installed as 1178 * the default tx key. 1179 */ 1180static __inline struct ieee80211_key * 1181ieee80211_crypto_getmcastkey(struct ieee80211vap *vap, 1182 struct ieee80211_node *ni) 1183{ 1184 if (vap->iv_def_txkey == IEEE80211_KEYIX_NONE || 1185 IEEE80211_KEY_UNDEFINED(&vap->iv_nw_keys[vap->iv_def_txkey])) 1186 return NULL; 1187 return &vap->iv_nw_keys[vap->iv_def_txkey]; 1188} 1189 1190/* 1191 * Encapsulate an outbound data frame. The mbuf chain is updated. 1192 * If an error is encountered NULL is returned. The caller is required 1193 * to provide a node reference and pullup the ethernet header in the 1194 * first mbuf. 1195 * 1196 * NB: Packet is assumed to be processed by ieee80211_classify which 1197 * marked EAPOL frames w/ M_EAPOL. 1198 */ 1199struct mbuf * 1200ieee80211_encap(struct ieee80211vap *vap, struct ieee80211_node *ni, 1201 struct mbuf *m) 1202{ 1203#define WH4(wh) ((struct ieee80211_frame_addr4 *)(wh)) 1204#define MC01(mc) ((struct ieee80211_meshcntl_ae01 *)mc) 1205 struct ieee80211com *ic = ni->ni_ic; 1206#ifdef IEEE80211_SUPPORT_MESH 1207 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1208 struct ieee80211_meshcntl_ae10 *mc; 1209 struct ieee80211_mesh_route *rt = NULL; 1210 int dir = -1; 1211#endif 1212 struct ether_header eh; 1213 struct ieee80211_frame *wh; 1214 struct ieee80211_key *key; 1215 struct llc *llc; 1216 int hdrsize, hdrspace, datalen, addqos, txfrag, is4addr; 1217 ieee80211_seq seqno; 1218 int meshhdrsize, meshae; 1219 uint8_t *qos; 1220 1221 IEEE80211_TX_LOCK_ASSERT(ic); 1222 1223 /* 1224 * Copy existing Ethernet header to a safe place. The 1225 * rest of the code assumes it's ok to strip it when 1226 * reorganizing state for the final encapsulation. 1227 */ 1228 KASSERT(m->m_len >= sizeof(eh), ("no ethernet header!")); 1229 ETHER_HEADER_COPY(&eh, mtod(m, caddr_t)); 1230 1231 /* 1232 * Insure space for additional headers. First identify 1233 * transmit key to use in calculating any buffer adjustments 1234 * required. This is also used below to do privacy 1235 * encapsulation work. Then calculate the 802.11 header 1236 * size and any padding required by the driver. 1237 * 1238 * Note key may be NULL if we fall back to the default 1239 * transmit key and that is not set. In that case the 1240 * buffer may not be expanded as needed by the cipher 1241 * routines, but they will/should discard it. 1242 */ 1243 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 1244 if (vap->iv_opmode == IEEE80211_M_STA || 1245 !IEEE80211_IS_MULTICAST(eh.ether_dhost) || 1246 (vap->iv_opmode == IEEE80211_M_WDS && 1247 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY))) 1248 key = ieee80211_crypto_getucastkey(vap, ni); 1249 else 1250 key = ieee80211_crypto_getmcastkey(vap, ni); 1251 if (key == NULL && (m->m_flags & M_EAPOL) == 0) { 1252 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, 1253 eh.ether_dhost, 1254 "no default transmit key (%s) deftxkey %u", 1255 __func__, vap->iv_def_txkey); 1256 vap->iv_stats.is_tx_nodefkey++; 1257 goto bad; 1258 } 1259 } else 1260 key = NULL; 1261 /* 1262 * XXX Some ap's don't handle QoS-encapsulated EAPOL 1263 * frames so suppress use. This may be an issue if other 1264 * ap's require all data frames to be QoS-encapsulated 1265 * once negotiated in which case we'll need to make this 1266 * configurable. 1267 * NB: mesh data frames are QoS. 1268 */ 1269 addqos = ((ni->ni_flags & (IEEE80211_NODE_QOS|IEEE80211_NODE_HT)) || 1270 (vap->iv_opmode == IEEE80211_M_MBSS)) && 1271 (m->m_flags & M_EAPOL) == 0; 1272 if (addqos) 1273 hdrsize = sizeof(struct ieee80211_qosframe); 1274 else 1275 hdrsize = sizeof(struct ieee80211_frame); 1276#ifdef IEEE80211_SUPPORT_MESH 1277 if (vap->iv_opmode == IEEE80211_M_MBSS) { 1278 /* 1279 * Mesh data frames are encapsulated according to the 1280 * rules of Section 11B.8.5 (p.139 of D3.0 spec). 1281 * o Group Addressed data (aka multicast) originating 1282 * at the local sta are sent w/ 3-address format and 1283 * address extension mode 00 1284 * o Individually Addressed data (aka unicast) originating 1285 * at the local sta are sent w/ 4-address format and 1286 * address extension mode 00 1287 * o Group Addressed data forwarded from a non-mesh sta are 1288 * sent w/ 3-address format and address extension mode 01 1289 * o Individually Address data from another sta are sent 1290 * w/ 4-address format and address extension mode 10 1291 */ 1292 is4addr = 0; /* NB: don't use, disable */ 1293 if (!IEEE80211_IS_MULTICAST(eh.ether_dhost)) { 1294 rt = ieee80211_mesh_rt_find(vap, eh.ether_dhost); 1295 KASSERT(rt != NULL, ("route is NULL")); 1296 dir = IEEE80211_FC1_DIR_DSTODS; 1297 hdrsize += IEEE80211_ADDR_LEN; 1298 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { 1299 if (IEEE80211_ADDR_EQ(rt->rt_mesh_gate, 1300 vap->iv_myaddr)) { 1301 IEEE80211_NOTE_MAC(vap, 1302 IEEE80211_MSG_MESH, 1303 eh.ether_dhost, 1304 "%s", "trying to send to ourself"); 1305 goto bad; 1306 } 1307 meshae = IEEE80211_MESH_AE_10; 1308 meshhdrsize = 1309 sizeof(struct ieee80211_meshcntl_ae10); 1310 } else { 1311 meshae = IEEE80211_MESH_AE_00; 1312 meshhdrsize = 1313 sizeof(struct ieee80211_meshcntl); 1314 } 1315 } else { 1316 dir = IEEE80211_FC1_DIR_FROMDS; 1317 if (!IEEE80211_ADDR_EQ(eh.ether_shost, vap->iv_myaddr)) { 1318 /* proxy group */ 1319 meshae = IEEE80211_MESH_AE_01; 1320 meshhdrsize = 1321 sizeof(struct ieee80211_meshcntl_ae01); 1322 } else { 1323 /* group */ 1324 meshae = IEEE80211_MESH_AE_00; 1325 meshhdrsize = sizeof(struct ieee80211_meshcntl); 1326 } 1327 } 1328 } else { 1329#endif 1330 /* 1331 * 4-address frames need to be generated for: 1332 * o packets sent through a WDS vap (IEEE80211_M_WDS) 1333 * o packets sent through a vap marked for relaying 1334 * (e.g. a station operating with dynamic WDS) 1335 */ 1336 is4addr = vap->iv_opmode == IEEE80211_M_WDS || 1337 ((vap->iv_flags_ext & IEEE80211_FEXT_4ADDR) && 1338 !IEEE80211_ADDR_EQ(eh.ether_shost, vap->iv_myaddr)); 1339 if (is4addr) 1340 hdrsize += IEEE80211_ADDR_LEN; 1341 meshhdrsize = meshae = 0; 1342#ifdef IEEE80211_SUPPORT_MESH 1343 } 1344#endif 1345 /* 1346 * Honor driver DATAPAD requirement. 1347 */ 1348 if (ic->ic_flags & IEEE80211_F_DATAPAD) 1349 hdrspace = roundup(hdrsize, sizeof(uint32_t)); 1350 else 1351 hdrspace = hdrsize; 1352 1353 if (__predict_true((m->m_flags & M_FF) == 0)) { 1354 /* 1355 * Normal frame. 1356 */ 1357 m = ieee80211_mbuf_adjust(vap, hdrspace + meshhdrsize, key, m); 1358 if (m == NULL) { 1359 /* NB: ieee80211_mbuf_adjust handles msgs+statistics */ 1360 goto bad; 1361 } 1362 /* NB: this could be optimized 'cuz of ieee80211_mbuf_adjust */ 1363 m_adj(m, sizeof(struct ether_header) - sizeof(struct llc)); 1364 llc = mtod(m, struct llc *); 1365 llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP; 1366 llc->llc_control = LLC_UI; 1367 llc->llc_snap.org_code[0] = 0; 1368 llc->llc_snap.org_code[1] = 0; 1369 llc->llc_snap.org_code[2] = 0; 1370 llc->llc_snap.ether_type = eh.ether_type; 1371 } else { 1372#ifdef IEEE80211_SUPPORT_SUPERG 1373 /* 1374 * Aggregated frame. 1375 */ 1376 m = ieee80211_ff_encap(vap, m, hdrspace + meshhdrsize, key); 1377 if (m == NULL) 1378#endif 1379 goto bad; 1380 } 1381 datalen = m->m_pkthdr.len; /* NB: w/o 802.11 header */ 1382 1383 M_PREPEND(m, hdrspace + meshhdrsize, M_NOWAIT); 1384 if (m == NULL) { 1385 vap->iv_stats.is_tx_nobuf++; 1386 goto bad; 1387 } 1388 wh = mtod(m, struct ieee80211_frame *); 1389 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_DATA; 1390 *(uint16_t *)wh->i_dur = 0; 1391 qos = NULL; /* NB: quiet compiler */ 1392 if (is4addr) { 1393 wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS; 1394 IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_macaddr); 1395 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); 1396 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_dhost); 1397 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, eh.ether_shost); 1398 } else switch (vap->iv_opmode) { 1399 case IEEE80211_M_STA: 1400 wh->i_fc[1] = IEEE80211_FC1_DIR_TODS; 1401 IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_bssid); 1402 IEEE80211_ADDR_COPY(wh->i_addr2, eh.ether_shost); 1403 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_dhost); 1404 break; 1405 case IEEE80211_M_IBSS: 1406 case IEEE80211_M_AHDEMO: 1407 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 1408 IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost); 1409 IEEE80211_ADDR_COPY(wh->i_addr2, eh.ether_shost); 1410 /* 1411 * NB: always use the bssid from iv_bss as the 1412 * neighbor's may be stale after an ibss merge 1413 */ 1414 IEEE80211_ADDR_COPY(wh->i_addr3, vap->iv_bss->ni_bssid); 1415 break; 1416 case IEEE80211_M_HOSTAP: 1417 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS; 1418 IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost); 1419 IEEE80211_ADDR_COPY(wh->i_addr2, ni->ni_bssid); 1420 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_shost); 1421 break; 1422#ifdef IEEE80211_SUPPORT_MESH 1423 case IEEE80211_M_MBSS: 1424 /* NB: offset by hdrspace to deal with DATAPAD */ 1425 mc = (struct ieee80211_meshcntl_ae10 *) 1426 (mtod(m, uint8_t *) + hdrspace); 1427 wh->i_fc[1] = dir; 1428 switch (meshae) { 1429 case IEEE80211_MESH_AE_00: /* no proxy */ 1430 mc->mc_flags = 0; 1431 if (dir == IEEE80211_FC1_DIR_DSTODS) { /* ucast */ 1432 IEEE80211_ADDR_COPY(wh->i_addr1, 1433 ni->ni_macaddr); 1434 IEEE80211_ADDR_COPY(wh->i_addr2, 1435 vap->iv_myaddr); 1436 IEEE80211_ADDR_COPY(wh->i_addr3, 1437 eh.ether_dhost); 1438 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, 1439 eh.ether_shost); 1440 qos =((struct ieee80211_qosframe_addr4 *) 1441 wh)->i_qos; 1442 } else if (dir == IEEE80211_FC1_DIR_FROMDS) { 1443 /* mcast */ 1444 IEEE80211_ADDR_COPY(wh->i_addr1, 1445 eh.ether_dhost); 1446 IEEE80211_ADDR_COPY(wh->i_addr2, 1447 vap->iv_myaddr); 1448 IEEE80211_ADDR_COPY(wh->i_addr3, 1449 eh.ether_shost); 1450 qos = ((struct ieee80211_qosframe *) 1451 wh)->i_qos; 1452 } 1453 break; 1454 case IEEE80211_MESH_AE_01: /* mcast, proxy */ 1455 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS; 1456 IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost); 1457 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); 1458 IEEE80211_ADDR_COPY(wh->i_addr3, vap->iv_myaddr); 1459 mc->mc_flags = 1; 1460 IEEE80211_ADDR_COPY(MC01(mc)->mc_addr4, 1461 eh.ether_shost); 1462 qos = ((struct ieee80211_qosframe *) wh)->i_qos; 1463 break; 1464 case IEEE80211_MESH_AE_10: /* ucast, proxy */ 1465 KASSERT(rt != NULL, ("route is NULL")); 1466 IEEE80211_ADDR_COPY(wh->i_addr1, rt->rt_nexthop); 1467 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); 1468 IEEE80211_ADDR_COPY(wh->i_addr3, rt->rt_mesh_gate); 1469 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, vap->iv_myaddr); 1470 mc->mc_flags = IEEE80211_MESH_AE_10; 1471 IEEE80211_ADDR_COPY(mc->mc_addr5, eh.ether_dhost); 1472 IEEE80211_ADDR_COPY(mc->mc_addr6, eh.ether_shost); 1473 qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos; 1474 break; 1475 default: 1476 KASSERT(0, ("meshae %d", meshae)); 1477 break; 1478 } 1479 mc->mc_ttl = ms->ms_ttl; 1480 ms->ms_seq++; 1481 LE_WRITE_4(mc->mc_seq, ms->ms_seq); 1482 break; 1483#endif 1484 case IEEE80211_M_WDS: /* NB: is4addr should always be true */ 1485 default: 1486 goto bad; 1487 } 1488 if (m->m_flags & M_MORE_DATA) 1489 wh->i_fc[1] |= IEEE80211_FC1_MORE_DATA; 1490 if (addqos) { 1491 int ac, tid; 1492 1493 if (is4addr) { 1494 qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos; 1495 /* NB: mesh case handled earlier */ 1496 } else if (vap->iv_opmode != IEEE80211_M_MBSS) 1497 qos = ((struct ieee80211_qosframe *) wh)->i_qos; 1498 ac = M_WME_GETAC(m); 1499 /* map from access class/queue to 11e header priorty value */ 1500 tid = WME_AC_TO_TID(ac); 1501 qos[0] = tid & IEEE80211_QOS_TID; 1502 if (ic->ic_wme.wme_wmeChanParams.cap_wmeParams[ac].wmep_noackPolicy) 1503 qos[0] |= IEEE80211_QOS_ACKPOLICY_NOACK; 1504#ifdef IEEE80211_SUPPORT_MESH 1505 if (vap->iv_opmode == IEEE80211_M_MBSS) 1506 qos[1] = IEEE80211_QOS_MC; 1507 else 1508#endif 1509 qos[1] = 0; 1510 wh->i_fc[0] |= IEEE80211_FC0_SUBTYPE_QOS; 1511 1512 if ((m->m_flags & M_AMPDU_MPDU) == 0) { 1513 /* 1514 * NB: don't assign a sequence # to potential 1515 * aggregates; we expect this happens at the 1516 * point the frame comes off any aggregation q 1517 * as otherwise we may introduce holes in the 1518 * BA sequence space and/or make window accouting 1519 * more difficult. 1520 * 1521 * XXX may want to control this with a driver 1522 * capability; this may also change when we pull 1523 * aggregation up into net80211 1524 */ 1525 seqno = ni->ni_txseqs[tid]++; 1526 *(uint16_t *)wh->i_seq = 1527 htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); 1528 M_SEQNO_SET(m, seqno); 1529 } 1530 } else { 1531 seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]++; 1532 *(uint16_t *)wh->i_seq = 1533 htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); 1534 M_SEQNO_SET(m, seqno); 1535 } 1536 1537 1538 /* check if xmit fragmentation is required */ 1539 txfrag = (m->m_pkthdr.len > vap->iv_fragthreshold && 1540 !IEEE80211_IS_MULTICAST(wh->i_addr1) && 1541 (vap->iv_caps & IEEE80211_C_TXFRAG) && 1542 (m->m_flags & (M_FF | M_AMPDU_MPDU)) == 0); 1543 if (key != NULL) { 1544 /* 1545 * IEEE 802.1X: send EAPOL frames always in the clear. 1546 * WPA/WPA2: encrypt EAPOL keys when pairwise keys are set. 1547 */ 1548 if ((m->m_flags & M_EAPOL) == 0 || 1549 ((vap->iv_flags & IEEE80211_F_WPA) && 1550 (vap->iv_opmode == IEEE80211_M_STA ? 1551 !IEEE80211_KEY_UNDEFINED(key) : 1552 !IEEE80211_KEY_UNDEFINED(&ni->ni_ucastkey)))) { 1553 wh->i_fc[1] |= IEEE80211_FC1_PROTECTED; 1554 if (!ieee80211_crypto_enmic(vap, key, m, txfrag)) { 1555 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, 1556 eh.ether_dhost, 1557 "%s", "enmic failed, discard frame"); 1558 vap->iv_stats.is_crypto_enmicfail++; 1559 goto bad; 1560 } 1561 } 1562 } 1563 if (txfrag && !ieee80211_fragment(vap, m, hdrsize, 1564 key != NULL ? key->wk_cipher->ic_header : 0, vap->iv_fragthreshold)) 1565 goto bad; 1566 1567 m->m_flags |= M_ENCAP; /* mark encapsulated */ 1568 1569 IEEE80211_NODE_STAT(ni, tx_data); 1570 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1571 IEEE80211_NODE_STAT(ni, tx_mcast); 1572 m->m_flags |= M_MCAST; 1573 } else 1574 IEEE80211_NODE_STAT(ni, tx_ucast); 1575 IEEE80211_NODE_STAT_ADD(ni, tx_bytes, datalen); 1576 1577 return m; 1578bad: 1579 if (m != NULL) 1580 m_freem(m); 1581 return NULL; 1582#undef WH4 1583#undef MC01 1584} 1585 1586void 1587ieee80211_free_mbuf(struct mbuf *m) 1588{ 1589 struct mbuf *next; 1590 1591 if (m == NULL) 1592 return; 1593 1594 do { 1595 next = m->m_nextpkt; 1596 m->m_nextpkt = NULL; 1597 m_freem(m); 1598 } while ((m = next) != NULL); 1599} 1600 1601/* 1602 * Fragment the frame according to the specified mtu. 1603 * The size of the 802.11 header (w/o padding) is provided 1604 * so we don't need to recalculate it. We create a new 1605 * mbuf for each fragment and chain it through m_nextpkt; 1606 * we might be able to optimize this by reusing the original 1607 * packet's mbufs but that is significantly more complicated. 1608 */ 1609static int 1610ieee80211_fragment(struct ieee80211vap *vap, struct mbuf *m0, 1611 u_int hdrsize, u_int ciphdrsize, u_int mtu) 1612{ 1613 struct ieee80211com *ic = vap->iv_ic; 1614 struct ieee80211_frame *wh, *whf; 1615 struct mbuf *m, *prev; 1616 u_int totalhdrsize, fragno, fragsize, off, remainder, payload; 1617 u_int hdrspace; 1618 1619 KASSERT(m0->m_nextpkt == NULL, ("mbuf already chained?")); 1620 KASSERT(m0->m_pkthdr.len > mtu, 1621 ("pktlen %u mtu %u", m0->m_pkthdr.len, mtu)); 1622 1623 /* 1624 * Honor driver DATAPAD requirement. 1625 */ 1626 if (ic->ic_flags & IEEE80211_F_DATAPAD) 1627 hdrspace = roundup(hdrsize, sizeof(uint32_t)); 1628 else 1629 hdrspace = hdrsize; 1630 1631 wh = mtod(m0, struct ieee80211_frame *); 1632 /* NB: mark the first frag; it will be propagated below */ 1633 wh->i_fc[1] |= IEEE80211_FC1_MORE_FRAG; 1634 totalhdrsize = hdrspace + ciphdrsize; 1635 fragno = 1; 1636 off = mtu - ciphdrsize; 1637 remainder = m0->m_pkthdr.len - off; 1638 prev = m0; 1639 do { 1640 fragsize = totalhdrsize + remainder; 1641 if (fragsize > mtu) 1642 fragsize = mtu; 1643 /* XXX fragsize can be >2048! */ 1644 KASSERT(fragsize < MCLBYTES, 1645 ("fragment size %u too big!", fragsize)); 1646 if (fragsize > MHLEN) 1647 m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR); 1648 else 1649 m = m_gethdr(M_NOWAIT, MT_DATA); 1650 if (m == NULL) 1651 goto bad; 1652 /* leave room to prepend any cipher header */ 1653 m_align(m, fragsize - ciphdrsize); 1654 1655 /* 1656 * Form the header in the fragment. Note that since 1657 * we mark the first fragment with the MORE_FRAG bit 1658 * it automatically is propagated to each fragment; we 1659 * need only clear it on the last fragment (done below). 1660 * NB: frag 1+ dont have Mesh Control field present. 1661 */ 1662 whf = mtod(m, struct ieee80211_frame *); 1663 memcpy(whf, wh, hdrsize); 1664#ifdef IEEE80211_SUPPORT_MESH 1665 if (vap->iv_opmode == IEEE80211_M_MBSS) { 1666 if (IEEE80211_IS_DSTODS(wh)) 1667 ((struct ieee80211_qosframe_addr4 *) 1668 whf)->i_qos[1] &= ~IEEE80211_QOS_MC; 1669 else 1670 ((struct ieee80211_qosframe *) 1671 whf)->i_qos[1] &= ~IEEE80211_QOS_MC; 1672 } 1673#endif 1674 *(uint16_t *)&whf->i_seq[0] |= htole16( 1675 (fragno & IEEE80211_SEQ_FRAG_MASK) << 1676 IEEE80211_SEQ_FRAG_SHIFT); 1677 fragno++; 1678 1679 payload = fragsize - totalhdrsize; 1680 /* NB: destination is known to be contiguous */ 1681 1682 m_copydata(m0, off, payload, mtod(m, uint8_t *) + hdrspace); 1683 m->m_len = hdrspace + payload; 1684 m->m_pkthdr.len = hdrspace + payload; 1685 m->m_flags |= M_FRAG; 1686 1687 /* chain up the fragment */ 1688 prev->m_nextpkt = m; 1689 prev = m; 1690 1691 /* deduct fragment just formed */ 1692 remainder -= payload; 1693 off += payload; 1694 } while (remainder != 0); 1695 1696 /* set the last fragment */ 1697 m->m_flags |= M_LASTFRAG; 1698 whf->i_fc[1] &= ~IEEE80211_FC1_MORE_FRAG; 1699 1700 /* strip first mbuf now that everything has been copied */ 1701 m_adj(m0, -(m0->m_pkthdr.len - (mtu - ciphdrsize))); 1702 m0->m_flags |= M_FIRSTFRAG | M_FRAG; 1703 1704 vap->iv_stats.is_tx_fragframes++; 1705 vap->iv_stats.is_tx_frags += fragno-1; 1706 1707 return 1; 1708bad: 1709 /* reclaim fragments but leave original frame for caller to free */ 1710 ieee80211_free_mbuf(m0->m_nextpkt); 1711 m0->m_nextpkt = NULL; 1712 return 0; 1713} 1714 1715/* 1716 * Add a supported rates element id to a frame. 1717 */ 1718uint8_t * 1719ieee80211_add_rates(uint8_t *frm, const struct ieee80211_rateset *rs) 1720{ 1721 int nrates; 1722 1723 *frm++ = IEEE80211_ELEMID_RATES; 1724 nrates = rs->rs_nrates; 1725 if (nrates > IEEE80211_RATE_SIZE) 1726 nrates = IEEE80211_RATE_SIZE; 1727 *frm++ = nrates; 1728 memcpy(frm, rs->rs_rates, nrates); 1729 return frm + nrates; 1730} 1731 1732/* 1733 * Add an extended supported rates element id to a frame. 1734 */ 1735uint8_t * 1736ieee80211_add_xrates(uint8_t *frm, const struct ieee80211_rateset *rs) 1737{ 1738 /* 1739 * Add an extended supported rates element if operating in 11g mode. 1740 */ 1741 if (rs->rs_nrates > IEEE80211_RATE_SIZE) { 1742 int nrates = rs->rs_nrates - IEEE80211_RATE_SIZE; 1743 *frm++ = IEEE80211_ELEMID_XRATES; 1744 *frm++ = nrates; 1745 memcpy(frm, rs->rs_rates + IEEE80211_RATE_SIZE, nrates); 1746 frm += nrates; 1747 } 1748 return frm; 1749} 1750 1751/* 1752 * Add an ssid element to a frame. 1753 */ 1754uint8_t * 1755ieee80211_add_ssid(uint8_t *frm, const uint8_t *ssid, u_int len) 1756{ 1757 *frm++ = IEEE80211_ELEMID_SSID; 1758 *frm++ = len; 1759 memcpy(frm, ssid, len); 1760 return frm + len; 1761} 1762 1763/* 1764 * Add an erp element to a frame. 1765 */ 1766static uint8_t * 1767ieee80211_add_erp(uint8_t *frm, struct ieee80211com *ic) 1768{ 1769 uint8_t erp; 1770 1771 *frm++ = IEEE80211_ELEMID_ERP; 1772 *frm++ = 1; 1773 erp = 0; 1774 if (ic->ic_nonerpsta != 0) 1775 erp |= IEEE80211_ERP_NON_ERP_PRESENT; 1776 if (ic->ic_flags & IEEE80211_F_USEPROT) 1777 erp |= IEEE80211_ERP_USE_PROTECTION; 1778 if (ic->ic_flags & IEEE80211_F_USEBARKER) 1779 erp |= IEEE80211_ERP_LONG_PREAMBLE; 1780 *frm++ = erp; 1781 return frm; 1782} 1783 1784/* 1785 * Add a CFParams element to a frame. 1786 */ 1787static uint8_t * 1788ieee80211_add_cfparms(uint8_t *frm, struct ieee80211com *ic) 1789{ 1790#define ADDSHORT(frm, v) do { \ 1791 LE_WRITE_2(frm, v); \ 1792 frm += 2; \ 1793} while (0) 1794 *frm++ = IEEE80211_ELEMID_CFPARMS; 1795 *frm++ = 6; 1796 *frm++ = 0; /* CFP count */ 1797 *frm++ = 2; /* CFP period */ 1798 ADDSHORT(frm, 0); /* CFP MaxDuration (TU) */ 1799 ADDSHORT(frm, 0); /* CFP CurRemaining (TU) */ 1800 return frm; 1801#undef ADDSHORT 1802} 1803 1804static __inline uint8_t * 1805add_appie(uint8_t *frm, const struct ieee80211_appie *ie) 1806{ 1807 memcpy(frm, ie->ie_data, ie->ie_len); 1808 return frm + ie->ie_len; 1809} 1810 1811static __inline uint8_t * 1812add_ie(uint8_t *frm, const uint8_t *ie) 1813{ 1814 memcpy(frm, ie, 2 + ie[1]); 1815 return frm + 2 + ie[1]; 1816} 1817 1818#define WME_OUI_BYTES 0x00, 0x50, 0xf2 1819/* 1820 * Add a WME information element to a frame. 1821 */ 1822uint8_t * 1823ieee80211_add_wme_info(uint8_t *frm, struct ieee80211_wme_state *wme) 1824{ 1825 static const struct ieee80211_wme_info info = { 1826 .wme_id = IEEE80211_ELEMID_VENDOR, 1827 .wme_len = sizeof(struct ieee80211_wme_info) - 2, 1828 .wme_oui = { WME_OUI_BYTES }, 1829 .wme_type = WME_OUI_TYPE, 1830 .wme_subtype = WME_INFO_OUI_SUBTYPE, 1831 .wme_version = WME_VERSION, 1832 .wme_info = 0, 1833 }; 1834 memcpy(frm, &info, sizeof(info)); 1835 return frm + sizeof(info); 1836} 1837 1838/* 1839 * Add a WME parameters element to a frame. 1840 */ 1841static uint8_t * 1842ieee80211_add_wme_param(uint8_t *frm, struct ieee80211_wme_state *wme) 1843{ 1844#define SM(_v, _f) (((_v) << _f##_S) & _f) 1845#define ADDSHORT(frm, v) do { \ 1846 LE_WRITE_2(frm, v); \ 1847 frm += 2; \ 1848} while (0) 1849 /* NB: this works 'cuz a param has an info at the front */ 1850 static const struct ieee80211_wme_info param = { 1851 .wme_id = IEEE80211_ELEMID_VENDOR, 1852 .wme_len = sizeof(struct ieee80211_wme_param) - 2, 1853 .wme_oui = { WME_OUI_BYTES }, 1854 .wme_type = WME_OUI_TYPE, 1855 .wme_subtype = WME_PARAM_OUI_SUBTYPE, 1856 .wme_version = WME_VERSION, 1857 }; 1858 int i; 1859 1860 memcpy(frm, ¶m, sizeof(param)); 1861 frm += __offsetof(struct ieee80211_wme_info, wme_info); 1862 *frm++ = wme->wme_bssChanParams.cap_info; /* AC info */ 1863 *frm++ = 0; /* reserved field */ 1864 for (i = 0; i < WME_NUM_AC; i++) { 1865 const struct wmeParams *ac = 1866 &wme->wme_bssChanParams.cap_wmeParams[i]; 1867 *frm++ = SM(i, WME_PARAM_ACI) 1868 | SM(ac->wmep_acm, WME_PARAM_ACM) 1869 | SM(ac->wmep_aifsn, WME_PARAM_AIFSN) 1870 ; 1871 *frm++ = SM(ac->wmep_logcwmax, WME_PARAM_LOGCWMAX) 1872 | SM(ac->wmep_logcwmin, WME_PARAM_LOGCWMIN) 1873 ; 1874 ADDSHORT(frm, ac->wmep_txopLimit); 1875 } 1876 return frm; 1877#undef SM 1878#undef ADDSHORT 1879} 1880#undef WME_OUI_BYTES 1881 1882/* 1883 * Add an 11h Power Constraint element to a frame. 1884 */ 1885static uint8_t * 1886ieee80211_add_powerconstraint(uint8_t *frm, struct ieee80211vap *vap) 1887{ 1888 const struct ieee80211_channel *c = vap->iv_bss->ni_chan; 1889 /* XXX per-vap tx power limit? */ 1890 int8_t limit = vap->iv_ic->ic_txpowlimit / 2; 1891 1892 frm[0] = IEEE80211_ELEMID_PWRCNSTR; 1893 frm[1] = 1; 1894 frm[2] = c->ic_maxregpower > limit ? c->ic_maxregpower - limit : 0; 1895 return frm + 3; 1896} 1897 1898/* 1899 * Add an 11h Power Capability element to a frame. 1900 */ 1901static uint8_t * 1902ieee80211_add_powercapability(uint8_t *frm, const struct ieee80211_channel *c) 1903{ 1904 frm[0] = IEEE80211_ELEMID_PWRCAP; 1905 frm[1] = 2; 1906 frm[2] = c->ic_minpower; 1907 frm[3] = c->ic_maxpower; 1908 return frm + 4; 1909} 1910 1911/* 1912 * Add an 11h Supported Channels element to a frame. 1913 */ 1914static uint8_t * 1915ieee80211_add_supportedchannels(uint8_t *frm, struct ieee80211com *ic) 1916{ 1917 static const int ielen = 26; 1918 1919 frm[0] = IEEE80211_ELEMID_SUPPCHAN; 1920 frm[1] = ielen; 1921 /* XXX not correct */ 1922 memcpy(frm+2, ic->ic_chan_avail, ielen); 1923 return frm + 2 + ielen; 1924} 1925 1926/* 1927 * Add an 11h Quiet time element to a frame. 1928 */ 1929static uint8_t * 1930ieee80211_add_quiet(uint8_t *frm, struct ieee80211vap *vap) 1931{ 1932 struct ieee80211_quiet_ie *quiet = (struct ieee80211_quiet_ie *) frm; 1933 1934 quiet->quiet_ie = IEEE80211_ELEMID_QUIET; 1935 quiet->len = 6; 1936 if (vap->iv_quiet_count_value == 1) 1937 vap->iv_quiet_count_value = vap->iv_quiet_count; 1938 else if (vap->iv_quiet_count_value > 1) 1939 vap->iv_quiet_count_value--; 1940 1941 if (vap->iv_quiet_count_value == 0) { 1942 /* value 0 is reserved as per 802.11h standerd */ 1943 vap->iv_quiet_count_value = 1; 1944 } 1945 1946 quiet->tbttcount = vap->iv_quiet_count_value; 1947 quiet->period = vap->iv_quiet_period; 1948 quiet->duration = htole16(vap->iv_quiet_duration); 1949 quiet->offset = htole16(vap->iv_quiet_offset); 1950 return frm + sizeof(*quiet); 1951} 1952 1953/* 1954 * Add an 11h Channel Switch Announcement element to a frame. 1955 * Note that we use the per-vap CSA count to adjust the global 1956 * counter so we can use this routine to form probe response 1957 * frames and get the current count. 1958 */ 1959static uint8_t * 1960ieee80211_add_csa(uint8_t *frm, struct ieee80211vap *vap) 1961{ 1962 struct ieee80211com *ic = vap->iv_ic; 1963 struct ieee80211_csa_ie *csa = (struct ieee80211_csa_ie *) frm; 1964 1965 csa->csa_ie = IEEE80211_ELEMID_CSA; 1966 csa->csa_len = 3; 1967 csa->csa_mode = 1; /* XXX force quiet on channel */ 1968 csa->csa_newchan = ieee80211_chan2ieee(ic, ic->ic_csa_newchan); 1969 csa->csa_count = ic->ic_csa_count - vap->iv_csa_count; 1970 return frm + sizeof(*csa); 1971} 1972 1973/* 1974 * Add an 11h country information element to a frame. 1975 */ 1976static uint8_t * 1977ieee80211_add_countryie(uint8_t *frm, struct ieee80211com *ic) 1978{ 1979 1980 if (ic->ic_countryie == NULL || 1981 ic->ic_countryie_chan != ic->ic_bsschan) { 1982 /* 1983 * Handle lazy construction of ie. This is done on 1984 * first use and after a channel change that requires 1985 * re-calculation. 1986 */ 1987 if (ic->ic_countryie != NULL) 1988 IEEE80211_FREE(ic->ic_countryie, M_80211_NODE_IE); 1989 ic->ic_countryie = ieee80211_alloc_countryie(ic); 1990 if (ic->ic_countryie == NULL) 1991 return frm; 1992 ic->ic_countryie_chan = ic->ic_bsschan; 1993 } 1994 return add_appie(frm, ic->ic_countryie); 1995} 1996 1997uint8_t * 1998ieee80211_add_wpa(uint8_t *frm, const struct ieee80211vap *vap) 1999{ 2000 if (vap->iv_flags & IEEE80211_F_WPA1 && vap->iv_wpa_ie != NULL) 2001 return (add_ie(frm, vap->iv_wpa_ie)); 2002 else { 2003 /* XXX else complain? */ 2004 return (frm); 2005 } 2006} 2007 2008uint8_t * 2009ieee80211_add_rsn(uint8_t *frm, const struct ieee80211vap *vap) 2010{ 2011 if (vap->iv_flags & IEEE80211_F_WPA2 && vap->iv_rsn_ie != NULL) 2012 return (add_ie(frm, vap->iv_rsn_ie)); 2013 else { 2014 /* XXX else complain? */ 2015 return (frm); 2016 } 2017} 2018 2019uint8_t * 2020ieee80211_add_qos(uint8_t *frm, const struct ieee80211_node *ni) 2021{ 2022 if (ni->ni_flags & IEEE80211_NODE_QOS) { 2023 *frm++ = IEEE80211_ELEMID_QOS; 2024 *frm++ = 1; 2025 *frm++ = 0; 2026 } 2027 2028 return (frm); 2029} 2030 2031/* 2032 * Send a probe request frame with the specified ssid 2033 * and any optional information element data. 2034 */ 2035int 2036ieee80211_send_probereq(struct ieee80211_node *ni, 2037 const uint8_t sa[IEEE80211_ADDR_LEN], 2038 const uint8_t da[IEEE80211_ADDR_LEN], 2039 const uint8_t bssid[IEEE80211_ADDR_LEN], 2040 const uint8_t *ssid, size_t ssidlen) 2041{ 2042 struct ieee80211vap *vap = ni->ni_vap; 2043 struct ieee80211com *ic = ni->ni_ic; 2044 const struct ieee80211_txparam *tp; 2045 struct ieee80211_bpf_params params; 2046 struct ieee80211_frame *wh; 2047 const struct ieee80211_rateset *rs; 2048 struct mbuf *m; 2049 uint8_t *frm; 2050 int ret; 2051 2052 if (vap->iv_state == IEEE80211_S_CAC) { 2053 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni, 2054 "block %s frame in CAC state", "probe request"); 2055 vap->iv_stats.is_tx_badstate++; 2056 return EIO; /* XXX */ 2057 } 2058 2059 /* 2060 * Hold a reference on the node so it doesn't go away until after 2061 * the xmit is complete all the way in the driver. On error we 2062 * will remove our reference. 2063 */ 2064 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2065 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", 2066 __func__, __LINE__, 2067 ni, ether_sprintf(ni->ni_macaddr), 2068 ieee80211_node_refcnt(ni)+1); 2069 ieee80211_ref_node(ni); 2070 2071 /* 2072 * prreq frame format 2073 * [tlv] ssid 2074 * [tlv] supported rates 2075 * [tlv] RSN (optional) 2076 * [tlv] extended supported rates 2077 * [tlv] WPA (optional) 2078 * [tlv] user-specified ie's 2079 */ 2080 m = ieee80211_getmgtframe(&frm, 2081 ic->ic_headroom + sizeof(struct ieee80211_frame), 2082 2 + IEEE80211_NWID_LEN 2083 + 2 + IEEE80211_RATE_SIZE 2084 + sizeof(struct ieee80211_ie_wpa) 2085 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2086 + sizeof(struct ieee80211_ie_wpa) 2087 + (vap->iv_appie_probereq != NULL ? 2088 vap->iv_appie_probereq->ie_len : 0) 2089 ); 2090 if (m == NULL) { 2091 vap->iv_stats.is_tx_nobuf++; 2092 ieee80211_free_node(ni); 2093 return ENOMEM; 2094 } 2095 2096 frm = ieee80211_add_ssid(frm, ssid, ssidlen); 2097 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2098 frm = ieee80211_add_rates(frm, rs); 2099 frm = ieee80211_add_rsn(frm, vap); 2100 frm = ieee80211_add_xrates(frm, rs); 2101 frm = ieee80211_add_wpa(frm, vap); 2102 if (vap->iv_appie_probereq != NULL) 2103 frm = add_appie(frm, vap->iv_appie_probereq); 2104 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2105 2106 KASSERT(M_LEADINGSPACE(m) >= sizeof(struct ieee80211_frame), 2107 ("leading space %zd", M_LEADINGSPACE(m))); 2108 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); 2109 if (m == NULL) { 2110 /* NB: cannot happen */ 2111 ieee80211_free_node(ni); 2112 return ENOMEM; 2113 } 2114 2115 IEEE80211_TX_LOCK(ic); 2116 wh = mtod(m, struct ieee80211_frame *); 2117 ieee80211_send_setup(ni, m, 2118 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ, 2119 IEEE80211_NONQOS_TID, sa, da, bssid); 2120 /* XXX power management? */ 2121 m->m_flags |= M_ENCAP; /* mark encapsulated */ 2122 2123 M_WME_SETAC(m, WME_AC_BE); 2124 2125 IEEE80211_NODE_STAT(ni, tx_probereq); 2126 IEEE80211_NODE_STAT(ni, tx_mgmt); 2127 2128 IEEE80211_DPRINTF(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS, 2129 "send probe req on channel %u bssid %s ssid \"%.*s\"\n", 2130 ieee80211_chan2ieee(ic, ic->ic_curchan), ether_sprintf(bssid), 2131 ssidlen, ssid); 2132 2133 memset(¶ms, 0, sizeof(params)); 2134 params.ibp_pri = M_WME_GETAC(m); 2135 tp = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)]; 2136 params.ibp_rate0 = tp->mgmtrate; 2137 if (IEEE80211_IS_MULTICAST(da)) { 2138 params.ibp_flags |= IEEE80211_BPF_NOACK; 2139 params.ibp_try0 = 1; 2140 } else 2141 params.ibp_try0 = tp->maxretry; 2142 params.ibp_power = ni->ni_txpower; 2143 ret = ieee80211_raw_output(vap, ni, m, ¶ms); 2144 IEEE80211_TX_UNLOCK(ic); 2145 return (ret); 2146} 2147 2148/* 2149 * Calculate capability information for mgt frames. 2150 */ 2151uint16_t 2152ieee80211_getcapinfo(struct ieee80211vap *vap, struct ieee80211_channel *chan) 2153{ 2154 struct ieee80211com *ic = vap->iv_ic; 2155 uint16_t capinfo; 2156 2157 KASSERT(vap->iv_opmode != IEEE80211_M_STA, ("station mode")); 2158 2159 if (vap->iv_opmode == IEEE80211_M_HOSTAP) 2160 capinfo = IEEE80211_CAPINFO_ESS; 2161 else if (vap->iv_opmode == IEEE80211_M_IBSS) 2162 capinfo = IEEE80211_CAPINFO_IBSS; 2163 else 2164 capinfo = 0; 2165 if (vap->iv_flags & IEEE80211_F_PRIVACY) 2166 capinfo |= IEEE80211_CAPINFO_PRIVACY; 2167 if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && 2168 IEEE80211_IS_CHAN_2GHZ(chan)) 2169 capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE; 2170 if (ic->ic_flags & IEEE80211_F_SHSLOT) 2171 capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME; 2172 if (IEEE80211_IS_CHAN_5GHZ(chan) && (vap->iv_flags & IEEE80211_F_DOTH)) 2173 capinfo |= IEEE80211_CAPINFO_SPECTRUM_MGMT; 2174 return capinfo; 2175} 2176 2177/* 2178 * Send a management frame. The node is for the destination (or ic_bss 2179 * when in station mode). Nodes other than ic_bss have their reference 2180 * count bumped to reflect our use for an indeterminant time. 2181 */ 2182int 2183ieee80211_send_mgmt(struct ieee80211_node *ni, int type, int arg) 2184{ 2185#define HTFLAGS (IEEE80211_NODE_HT | IEEE80211_NODE_HTCOMPAT) 2186#define senderr(_x, _v) do { vap->iv_stats._v++; ret = _x; goto bad; } while (0) 2187 struct ieee80211vap *vap = ni->ni_vap; 2188 struct ieee80211com *ic = ni->ni_ic; 2189 struct ieee80211_node *bss = vap->iv_bss; 2190 struct ieee80211_bpf_params params; 2191 struct mbuf *m; 2192 uint8_t *frm; 2193 uint16_t capinfo; 2194 int has_challenge, is_shared_key, ret, status; 2195 2196 KASSERT(ni != NULL, ("null node")); 2197 2198 /* 2199 * Hold a reference on the node so it doesn't go away until after 2200 * the xmit is complete all the way in the driver. On error we 2201 * will remove our reference. 2202 */ 2203 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2204 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", 2205 __func__, __LINE__, 2206 ni, ether_sprintf(ni->ni_macaddr), 2207 ieee80211_node_refcnt(ni)+1); 2208 ieee80211_ref_node(ni); 2209 2210 memset(¶ms, 0, sizeof(params)); 2211 switch (type) { 2212 2213 case IEEE80211_FC0_SUBTYPE_AUTH: 2214 status = arg >> 16; 2215 arg &= 0xffff; 2216 has_challenge = ((arg == IEEE80211_AUTH_SHARED_CHALLENGE || 2217 arg == IEEE80211_AUTH_SHARED_RESPONSE) && 2218 ni->ni_challenge != NULL); 2219 2220 /* 2221 * Deduce whether we're doing open authentication or 2222 * shared key authentication. We do the latter if 2223 * we're in the middle of a shared key authentication 2224 * handshake or if we're initiating an authentication 2225 * request and configured to use shared key. 2226 */ 2227 is_shared_key = has_challenge || 2228 arg >= IEEE80211_AUTH_SHARED_RESPONSE || 2229 (arg == IEEE80211_AUTH_SHARED_REQUEST && 2230 bss->ni_authmode == IEEE80211_AUTH_SHARED); 2231 2232 m = ieee80211_getmgtframe(&frm, 2233 ic->ic_headroom + sizeof(struct ieee80211_frame), 2234 3 * sizeof(uint16_t) 2235 + (has_challenge && status == IEEE80211_STATUS_SUCCESS ? 2236 sizeof(uint16_t)+IEEE80211_CHALLENGE_LEN : 0) 2237 ); 2238 if (m == NULL) 2239 senderr(ENOMEM, is_tx_nobuf); 2240 2241 ((uint16_t *)frm)[0] = 2242 (is_shared_key) ? htole16(IEEE80211_AUTH_ALG_SHARED) 2243 : htole16(IEEE80211_AUTH_ALG_OPEN); 2244 ((uint16_t *)frm)[1] = htole16(arg); /* sequence number */ 2245 ((uint16_t *)frm)[2] = htole16(status);/* status */ 2246 2247 if (has_challenge && status == IEEE80211_STATUS_SUCCESS) { 2248 ((uint16_t *)frm)[3] = 2249 htole16((IEEE80211_CHALLENGE_LEN << 8) | 2250 IEEE80211_ELEMID_CHALLENGE); 2251 memcpy(&((uint16_t *)frm)[4], ni->ni_challenge, 2252 IEEE80211_CHALLENGE_LEN); 2253 m->m_pkthdr.len = m->m_len = 2254 4 * sizeof(uint16_t) + IEEE80211_CHALLENGE_LEN; 2255 if (arg == IEEE80211_AUTH_SHARED_RESPONSE) { 2256 IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni, 2257 "request encrypt frame (%s)", __func__); 2258 /* mark frame for encryption */ 2259 params.ibp_flags |= IEEE80211_BPF_CRYPTO; 2260 } 2261 } else 2262 m->m_pkthdr.len = m->m_len = 3 * sizeof(uint16_t); 2263 2264 /* XXX not right for shared key */ 2265 if (status == IEEE80211_STATUS_SUCCESS) 2266 IEEE80211_NODE_STAT(ni, tx_auth); 2267 else 2268 IEEE80211_NODE_STAT(ni, tx_auth_fail); 2269 2270 if (vap->iv_opmode == IEEE80211_M_STA) 2271 ieee80211_add_callback(m, ieee80211_tx_mgt_cb, 2272 (void *) vap->iv_state); 2273 break; 2274 2275 case IEEE80211_FC0_SUBTYPE_DEAUTH: 2276 IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni, 2277 "send station deauthenticate (reason %d)", arg); 2278 m = ieee80211_getmgtframe(&frm, 2279 ic->ic_headroom + sizeof(struct ieee80211_frame), 2280 sizeof(uint16_t)); 2281 if (m == NULL) 2282 senderr(ENOMEM, is_tx_nobuf); 2283 *(uint16_t *)frm = htole16(arg); /* reason */ 2284 m->m_pkthdr.len = m->m_len = sizeof(uint16_t); 2285 2286 IEEE80211_NODE_STAT(ni, tx_deauth); 2287 IEEE80211_NODE_STAT_SET(ni, tx_deauth_code, arg); 2288 2289 ieee80211_node_unauthorize(ni); /* port closed */ 2290 break; 2291 2292 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 2293 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 2294 /* 2295 * asreq frame format 2296 * [2] capability information 2297 * [2] listen interval 2298 * [6*] current AP address (reassoc only) 2299 * [tlv] ssid 2300 * [tlv] supported rates 2301 * [tlv] extended supported rates 2302 * [4] power capability (optional) 2303 * [28] supported channels (optional) 2304 * [tlv] HT capabilities 2305 * [tlv] WME (optional) 2306 * [tlv] Vendor OUI HT capabilities (optional) 2307 * [tlv] Atheros capabilities (if negotiated) 2308 * [tlv] AppIE's (optional) 2309 */ 2310 m = ieee80211_getmgtframe(&frm, 2311 ic->ic_headroom + sizeof(struct ieee80211_frame), 2312 sizeof(uint16_t) 2313 + sizeof(uint16_t) 2314 + IEEE80211_ADDR_LEN 2315 + 2 + IEEE80211_NWID_LEN 2316 + 2 + IEEE80211_RATE_SIZE 2317 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2318 + 4 2319 + 2 + 26 2320 + sizeof(struct ieee80211_wme_info) 2321 + sizeof(struct ieee80211_ie_htcap) 2322 + 4 + sizeof(struct ieee80211_ie_htcap) 2323#ifdef IEEE80211_SUPPORT_SUPERG 2324 + sizeof(struct ieee80211_ath_ie) 2325#endif 2326 + (vap->iv_appie_wpa != NULL ? 2327 vap->iv_appie_wpa->ie_len : 0) 2328 + (vap->iv_appie_assocreq != NULL ? 2329 vap->iv_appie_assocreq->ie_len : 0) 2330 ); 2331 if (m == NULL) 2332 senderr(ENOMEM, is_tx_nobuf); 2333 2334 KASSERT(vap->iv_opmode == IEEE80211_M_STA, 2335 ("wrong mode %u", vap->iv_opmode)); 2336 capinfo = IEEE80211_CAPINFO_ESS; 2337 if (vap->iv_flags & IEEE80211_F_PRIVACY) 2338 capinfo |= IEEE80211_CAPINFO_PRIVACY; 2339 /* 2340 * NB: Some 11a AP's reject the request when 2341 * short premable is set. 2342 */ 2343 if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && 2344 IEEE80211_IS_CHAN_2GHZ(ic->ic_curchan)) 2345 capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE; 2346 if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 2347 (ic->ic_caps & IEEE80211_C_SHSLOT)) 2348 capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME; 2349 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SPECTRUM_MGMT) && 2350 (vap->iv_flags & IEEE80211_F_DOTH)) 2351 capinfo |= IEEE80211_CAPINFO_SPECTRUM_MGMT; 2352 *(uint16_t *)frm = htole16(capinfo); 2353 frm += 2; 2354 2355 KASSERT(bss->ni_intval != 0, ("beacon interval is zero!")); 2356 *(uint16_t *)frm = htole16(howmany(ic->ic_lintval, 2357 bss->ni_intval)); 2358 frm += 2; 2359 2360 if (type == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) { 2361 IEEE80211_ADDR_COPY(frm, bss->ni_bssid); 2362 frm += IEEE80211_ADDR_LEN; 2363 } 2364 2365 frm = ieee80211_add_ssid(frm, ni->ni_essid, ni->ni_esslen); 2366 frm = ieee80211_add_rates(frm, &ni->ni_rates); 2367 frm = ieee80211_add_rsn(frm, vap); 2368 frm = ieee80211_add_xrates(frm, &ni->ni_rates); 2369 if (capinfo & IEEE80211_CAPINFO_SPECTRUM_MGMT) { 2370 frm = ieee80211_add_powercapability(frm, 2371 ic->ic_curchan); 2372 frm = ieee80211_add_supportedchannels(frm, ic); 2373 } 2374 2375 /* 2376 * Check the channel - we may be using an 11n NIC with an 2377 * 11n capable station, but we're configured to be an 11b 2378 * channel. 2379 */ 2380 if ((vap->iv_flags_ht & IEEE80211_FHT_HT) && 2381 IEEE80211_IS_CHAN_HT(ni->ni_chan) && 2382 ni->ni_ies.htcap_ie != NULL && 2383 ni->ni_ies.htcap_ie[0] == IEEE80211_ELEMID_HTCAP) { 2384 frm = ieee80211_add_htcap(frm, ni); 2385 } 2386 frm = ieee80211_add_wpa(frm, vap); 2387 if ((ic->ic_flags & IEEE80211_F_WME) && 2388 ni->ni_ies.wme_ie != NULL) 2389 frm = ieee80211_add_wme_info(frm, &ic->ic_wme); 2390 2391 /* 2392 * Same deal - only send HT info if we're on an 11n 2393 * capable channel. 2394 */ 2395 if ((vap->iv_flags_ht & IEEE80211_FHT_HT) && 2396 IEEE80211_IS_CHAN_HT(ni->ni_chan) && 2397 ni->ni_ies.htcap_ie != NULL && 2398 ni->ni_ies.htcap_ie[0] == IEEE80211_ELEMID_VENDOR) { 2399 frm = ieee80211_add_htcap_vendor(frm, ni); 2400 } 2401#ifdef IEEE80211_SUPPORT_SUPERG 2402 if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS)) { 2403 frm = ieee80211_add_ath(frm, 2404 IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS), 2405 ((vap->iv_flags & IEEE80211_F_WPA) == 0 && 2406 ni->ni_authmode != IEEE80211_AUTH_8021X) ? 2407 vap->iv_def_txkey : IEEE80211_KEYIX_NONE); 2408 } 2409#endif /* IEEE80211_SUPPORT_SUPERG */ 2410 if (vap->iv_appie_assocreq != NULL) 2411 frm = add_appie(frm, vap->iv_appie_assocreq); 2412 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2413 2414 ieee80211_add_callback(m, ieee80211_tx_mgt_cb, 2415 (void *) vap->iv_state); 2416 break; 2417 2418 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 2419 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 2420 /* 2421 * asresp frame format 2422 * [2] capability information 2423 * [2] status 2424 * [2] association ID 2425 * [tlv] supported rates 2426 * [tlv] extended supported rates 2427 * [tlv] HT capabilities (standard, if STA enabled) 2428 * [tlv] HT information (standard, if STA enabled) 2429 * [tlv] WME (if configured and STA enabled) 2430 * [tlv] HT capabilities (vendor OUI, if STA enabled) 2431 * [tlv] HT information (vendor OUI, if STA enabled) 2432 * [tlv] Atheros capabilities (if STA enabled) 2433 * [tlv] AppIE's (optional) 2434 */ 2435 m = ieee80211_getmgtframe(&frm, 2436 ic->ic_headroom + sizeof(struct ieee80211_frame), 2437 sizeof(uint16_t) 2438 + sizeof(uint16_t) 2439 + sizeof(uint16_t) 2440 + 2 + IEEE80211_RATE_SIZE 2441 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2442 + sizeof(struct ieee80211_ie_htcap) + 4 2443 + sizeof(struct ieee80211_ie_htinfo) + 4 2444 + sizeof(struct ieee80211_wme_param) 2445#ifdef IEEE80211_SUPPORT_SUPERG 2446 + sizeof(struct ieee80211_ath_ie) 2447#endif 2448 + (vap->iv_appie_assocresp != NULL ? 2449 vap->iv_appie_assocresp->ie_len : 0) 2450 ); 2451 if (m == NULL) 2452 senderr(ENOMEM, is_tx_nobuf); 2453 2454 capinfo = ieee80211_getcapinfo(vap, bss->ni_chan); 2455 *(uint16_t *)frm = htole16(capinfo); 2456 frm += 2; 2457 2458 *(uint16_t *)frm = htole16(arg); /* status */ 2459 frm += 2; 2460 2461 if (arg == IEEE80211_STATUS_SUCCESS) { 2462 *(uint16_t *)frm = htole16(ni->ni_associd); 2463 IEEE80211_NODE_STAT(ni, tx_assoc); 2464 } else 2465 IEEE80211_NODE_STAT(ni, tx_assoc_fail); 2466 frm += 2; 2467 2468 frm = ieee80211_add_rates(frm, &ni->ni_rates); 2469 frm = ieee80211_add_xrates(frm, &ni->ni_rates); 2470 /* NB: respond according to what we received */ 2471 if ((ni->ni_flags & HTFLAGS) == IEEE80211_NODE_HT) { 2472 frm = ieee80211_add_htcap(frm, ni); 2473 frm = ieee80211_add_htinfo(frm, ni); 2474 } 2475 if ((vap->iv_flags & IEEE80211_F_WME) && 2476 ni->ni_ies.wme_ie != NULL) 2477 frm = ieee80211_add_wme_param(frm, &ic->ic_wme); 2478 if ((ni->ni_flags & HTFLAGS) == HTFLAGS) { 2479 frm = ieee80211_add_htcap_vendor(frm, ni); 2480 frm = ieee80211_add_htinfo_vendor(frm, ni); 2481 } 2482#ifdef IEEE80211_SUPPORT_SUPERG 2483 if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS)) 2484 frm = ieee80211_add_ath(frm, 2485 IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS), 2486 ((vap->iv_flags & IEEE80211_F_WPA) == 0 && 2487 ni->ni_authmode != IEEE80211_AUTH_8021X) ? 2488 vap->iv_def_txkey : IEEE80211_KEYIX_NONE); 2489#endif /* IEEE80211_SUPPORT_SUPERG */ 2490 if (vap->iv_appie_assocresp != NULL) 2491 frm = add_appie(frm, vap->iv_appie_assocresp); 2492 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2493 break; 2494 2495 case IEEE80211_FC0_SUBTYPE_DISASSOC: 2496 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 2497 "send station disassociate (reason %d)", arg); 2498 m = ieee80211_getmgtframe(&frm, 2499 ic->ic_headroom + sizeof(struct ieee80211_frame), 2500 sizeof(uint16_t)); 2501 if (m == NULL) 2502 senderr(ENOMEM, is_tx_nobuf); 2503 *(uint16_t *)frm = htole16(arg); /* reason */ 2504 m->m_pkthdr.len = m->m_len = sizeof(uint16_t); 2505 2506 IEEE80211_NODE_STAT(ni, tx_disassoc); 2507 IEEE80211_NODE_STAT_SET(ni, tx_disassoc_code, arg); 2508 break; 2509 2510 default: 2511 IEEE80211_NOTE(vap, IEEE80211_MSG_ANY, ni, 2512 "invalid mgmt frame type %u", type); 2513 senderr(EINVAL, is_tx_unknownmgt); 2514 /* NOTREACHED */ 2515 } 2516 2517 /* NB: force non-ProbeResp frames to the highest queue */ 2518 params.ibp_pri = WME_AC_VO; 2519 params.ibp_rate0 = bss->ni_txparms->mgmtrate; 2520 /* NB: we know all frames are unicast */ 2521 params.ibp_try0 = bss->ni_txparms->maxretry; 2522 params.ibp_power = bss->ni_txpower; 2523 return ieee80211_mgmt_output(ni, m, type, ¶ms); 2524bad: 2525 ieee80211_free_node(ni); 2526 return ret; 2527#undef senderr 2528#undef HTFLAGS 2529} 2530 2531/* 2532 * Return an mbuf with a probe response frame in it. 2533 * Space is left to prepend and 802.11 header at the 2534 * front but it's left to the caller to fill in. 2535 */ 2536struct mbuf * 2537ieee80211_alloc_proberesp(struct ieee80211_node *bss, int legacy) 2538{ 2539 struct ieee80211vap *vap = bss->ni_vap; 2540 struct ieee80211com *ic = bss->ni_ic; 2541 const struct ieee80211_rateset *rs; 2542 struct mbuf *m; 2543 uint16_t capinfo; 2544 uint8_t *frm; 2545 2546 /* 2547 * probe response frame format 2548 * [8] time stamp 2549 * [2] beacon interval 2550 * [2] cabability information 2551 * [tlv] ssid 2552 * [tlv] supported rates 2553 * [tlv] parameter set (FH/DS) 2554 * [tlv] parameter set (IBSS) 2555 * [tlv] country (optional) 2556 * [3] power control (optional) 2557 * [5] channel switch announcement (CSA) (optional) 2558 * [tlv] extended rate phy (ERP) 2559 * [tlv] extended supported rates 2560 * [tlv] RSN (optional) 2561 * [tlv] HT capabilities 2562 * [tlv] HT information 2563 * [tlv] WPA (optional) 2564 * [tlv] WME (optional) 2565 * [tlv] Vendor OUI HT capabilities (optional) 2566 * [tlv] Vendor OUI HT information (optional) 2567 * [tlv] Atheros capabilities 2568 * [tlv] AppIE's (optional) 2569 * [tlv] Mesh ID (MBSS) 2570 * [tlv] Mesh Conf (MBSS) 2571 */ 2572 m = ieee80211_getmgtframe(&frm, 2573 ic->ic_headroom + sizeof(struct ieee80211_frame), 2574 8 2575 + sizeof(uint16_t) 2576 + sizeof(uint16_t) 2577 + 2 + IEEE80211_NWID_LEN 2578 + 2 + IEEE80211_RATE_SIZE 2579 + 7 /* max(7,3) */ 2580 + IEEE80211_COUNTRY_MAX_SIZE 2581 + 3 2582 + sizeof(struct ieee80211_csa_ie) 2583 + sizeof(struct ieee80211_quiet_ie) 2584 + 3 2585 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2586 + sizeof(struct ieee80211_ie_wpa) 2587 + sizeof(struct ieee80211_ie_htcap) 2588 + sizeof(struct ieee80211_ie_htinfo) 2589 + sizeof(struct ieee80211_ie_wpa) 2590 + sizeof(struct ieee80211_wme_param) 2591 + 4 + sizeof(struct ieee80211_ie_htcap) 2592 + 4 + sizeof(struct ieee80211_ie_htinfo) 2593#ifdef IEEE80211_SUPPORT_SUPERG 2594 + sizeof(struct ieee80211_ath_ie) 2595#endif 2596#ifdef IEEE80211_SUPPORT_MESH 2597 + 2 + IEEE80211_MESHID_LEN 2598 + sizeof(struct ieee80211_meshconf_ie) 2599#endif 2600 + (vap->iv_appie_proberesp != NULL ? 2601 vap->iv_appie_proberesp->ie_len : 0) 2602 ); 2603 if (m == NULL) { 2604 vap->iv_stats.is_tx_nobuf++; 2605 return NULL; 2606 } 2607 2608 memset(frm, 0, 8); /* timestamp should be filled later */ 2609 frm += 8; 2610 *(uint16_t *)frm = htole16(bss->ni_intval); 2611 frm += 2; 2612 capinfo = ieee80211_getcapinfo(vap, bss->ni_chan); 2613 *(uint16_t *)frm = htole16(capinfo); 2614 frm += 2; 2615 2616 frm = ieee80211_add_ssid(frm, bss->ni_essid, bss->ni_esslen); 2617 rs = ieee80211_get_suprates(ic, bss->ni_chan); 2618 frm = ieee80211_add_rates(frm, rs); 2619 2620 if (IEEE80211_IS_CHAN_FHSS(bss->ni_chan)) { 2621 *frm++ = IEEE80211_ELEMID_FHPARMS; 2622 *frm++ = 5; 2623 *frm++ = bss->ni_fhdwell & 0x00ff; 2624 *frm++ = (bss->ni_fhdwell >> 8) & 0x00ff; 2625 *frm++ = IEEE80211_FH_CHANSET( 2626 ieee80211_chan2ieee(ic, bss->ni_chan)); 2627 *frm++ = IEEE80211_FH_CHANPAT( 2628 ieee80211_chan2ieee(ic, bss->ni_chan)); 2629 *frm++ = bss->ni_fhindex; 2630 } else { 2631 *frm++ = IEEE80211_ELEMID_DSPARMS; 2632 *frm++ = 1; 2633 *frm++ = ieee80211_chan2ieee(ic, bss->ni_chan); 2634 } 2635 2636 if (vap->iv_opmode == IEEE80211_M_IBSS) { 2637 *frm++ = IEEE80211_ELEMID_IBSSPARMS; 2638 *frm++ = 2; 2639 *frm++ = 0; *frm++ = 0; /* TODO: ATIM window */ 2640 } 2641 if ((vap->iv_flags & IEEE80211_F_DOTH) || 2642 (vap->iv_flags_ext & IEEE80211_FEXT_DOTD)) 2643 frm = ieee80211_add_countryie(frm, ic); 2644 if (vap->iv_flags & IEEE80211_F_DOTH) { 2645 if (IEEE80211_IS_CHAN_5GHZ(bss->ni_chan)) 2646 frm = ieee80211_add_powerconstraint(frm, vap); 2647 if (ic->ic_flags & IEEE80211_F_CSAPENDING) 2648 frm = ieee80211_add_csa(frm, vap); 2649 } 2650 if (vap->iv_flags & IEEE80211_F_DOTH) { 2651 if (IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) && 2652 (vap->iv_flags_ext & IEEE80211_FEXT_DFS)) { 2653 if (vap->iv_quiet) 2654 frm = ieee80211_add_quiet(frm, vap); 2655 } 2656 } 2657 if (IEEE80211_IS_CHAN_ANYG(bss->ni_chan)) 2658 frm = ieee80211_add_erp(frm, ic); 2659 frm = ieee80211_add_xrates(frm, rs); 2660 frm = ieee80211_add_rsn(frm, vap); 2661 /* 2662 * NB: legacy 11b clients do not get certain ie's. 2663 * The caller identifies such clients by passing 2664 * a token in legacy to us. Could expand this to be 2665 * any legacy client for stuff like HT ie's. 2666 */ 2667 if (IEEE80211_IS_CHAN_HT(bss->ni_chan) && 2668 legacy != IEEE80211_SEND_LEGACY_11B) { 2669 frm = ieee80211_add_htcap(frm, bss); 2670 frm = ieee80211_add_htinfo(frm, bss); 2671 } 2672 frm = ieee80211_add_wpa(frm, vap); 2673 if (vap->iv_flags & IEEE80211_F_WME) 2674 frm = ieee80211_add_wme_param(frm, &ic->ic_wme); 2675 if (IEEE80211_IS_CHAN_HT(bss->ni_chan) && 2676 (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) && 2677 legacy != IEEE80211_SEND_LEGACY_11B) { 2678 frm = ieee80211_add_htcap_vendor(frm, bss); 2679 frm = ieee80211_add_htinfo_vendor(frm, bss); 2680 } 2681#ifdef IEEE80211_SUPPORT_SUPERG 2682 if ((vap->iv_flags & IEEE80211_F_ATHEROS) && 2683 legacy != IEEE80211_SEND_LEGACY_11B) 2684 frm = ieee80211_add_athcaps(frm, bss); 2685#endif 2686 if (vap->iv_appie_proberesp != NULL) 2687 frm = add_appie(frm, vap->iv_appie_proberesp); 2688#ifdef IEEE80211_SUPPORT_MESH 2689 if (vap->iv_opmode == IEEE80211_M_MBSS) { 2690 frm = ieee80211_add_meshid(frm, vap); 2691 frm = ieee80211_add_meshconf(frm, vap); 2692 } 2693#endif 2694 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2695 2696 return m; 2697} 2698 2699/* 2700 * Send a probe response frame to the specified mac address. 2701 * This does not go through the normal mgt frame api so we 2702 * can specify the destination address and re-use the bss node 2703 * for the sta reference. 2704 */ 2705int 2706ieee80211_send_proberesp(struct ieee80211vap *vap, 2707 const uint8_t da[IEEE80211_ADDR_LEN], int legacy) 2708{ 2709 struct ieee80211_node *bss = vap->iv_bss; 2710 struct ieee80211com *ic = vap->iv_ic; 2711 struct ieee80211_frame *wh; 2712 struct mbuf *m; 2713 int ret; 2714 2715 if (vap->iv_state == IEEE80211_S_CAC) { 2716 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, bss, 2717 "block %s frame in CAC state", "probe response"); 2718 vap->iv_stats.is_tx_badstate++; 2719 return EIO; /* XXX */ 2720 } 2721 2722 /* 2723 * Hold a reference on the node so it doesn't go away until after 2724 * the xmit is complete all the way in the driver. On error we 2725 * will remove our reference. 2726 */ 2727 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2728 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", 2729 __func__, __LINE__, bss, ether_sprintf(bss->ni_macaddr), 2730 ieee80211_node_refcnt(bss)+1); 2731 ieee80211_ref_node(bss); 2732 2733 m = ieee80211_alloc_proberesp(bss, legacy); 2734 if (m == NULL) { 2735 ieee80211_free_node(bss); 2736 return ENOMEM; 2737 } 2738 2739 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); 2740 KASSERT(m != NULL, ("no room for header")); 2741 2742 IEEE80211_TX_LOCK(ic); 2743 wh = mtod(m, struct ieee80211_frame *); 2744 ieee80211_send_setup(bss, m, 2745 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_RESP, 2746 IEEE80211_NONQOS_TID, vap->iv_myaddr, da, bss->ni_bssid); 2747 /* XXX power management? */ 2748 m->m_flags |= M_ENCAP; /* mark encapsulated */ 2749 2750 M_WME_SETAC(m, WME_AC_BE); 2751 2752 IEEE80211_DPRINTF(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS, 2753 "send probe resp on channel %u to %s%s\n", 2754 ieee80211_chan2ieee(ic, ic->ic_curchan), ether_sprintf(da), 2755 legacy ? " <legacy>" : ""); 2756 IEEE80211_NODE_STAT(bss, tx_mgmt); 2757 2758 ret = ieee80211_raw_output(vap, bss, m, NULL); 2759 IEEE80211_TX_UNLOCK(ic); 2760 return (ret); 2761} 2762 2763/* 2764 * Allocate and build a RTS (Request To Send) control frame. 2765 */ 2766struct mbuf * 2767ieee80211_alloc_rts(struct ieee80211com *ic, 2768 const uint8_t ra[IEEE80211_ADDR_LEN], 2769 const uint8_t ta[IEEE80211_ADDR_LEN], 2770 uint16_t dur) 2771{ 2772 struct ieee80211_frame_rts *rts; 2773 struct mbuf *m; 2774 2775 /* XXX honor ic_headroom */ 2776 m = m_gethdr(M_NOWAIT, MT_DATA); 2777 if (m != NULL) { 2778 rts = mtod(m, struct ieee80211_frame_rts *); 2779 rts->i_fc[0] = IEEE80211_FC0_VERSION_0 | 2780 IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_RTS; 2781 rts->i_fc[1] = IEEE80211_FC1_DIR_NODS; 2782 *(u_int16_t *)rts->i_dur = htole16(dur); 2783 IEEE80211_ADDR_COPY(rts->i_ra, ra); 2784 IEEE80211_ADDR_COPY(rts->i_ta, ta); 2785 2786 m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_rts); 2787 } 2788 return m; 2789} 2790 2791/* 2792 * Allocate and build a CTS (Clear To Send) control frame. 2793 */ 2794struct mbuf * 2795ieee80211_alloc_cts(struct ieee80211com *ic, 2796 const uint8_t ra[IEEE80211_ADDR_LEN], uint16_t dur) 2797{ 2798 struct ieee80211_frame_cts *cts; 2799 struct mbuf *m; 2800 2801 /* XXX honor ic_headroom */ 2802 m = m_gethdr(M_NOWAIT, MT_DATA); 2803 if (m != NULL) { 2804 cts = mtod(m, struct ieee80211_frame_cts *); 2805 cts->i_fc[0] = IEEE80211_FC0_VERSION_0 | 2806 IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_CTS; 2807 cts->i_fc[1] = IEEE80211_FC1_DIR_NODS; 2808 *(u_int16_t *)cts->i_dur = htole16(dur); 2809 IEEE80211_ADDR_COPY(cts->i_ra, ra); 2810 2811 m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_cts); 2812 } 2813 return m; 2814} 2815 2816static void 2817ieee80211_tx_mgt_timeout(void *arg) 2818{ 2819 struct ieee80211vap *vap = arg; 2820 2821 IEEE80211_LOCK(vap->iv_ic); 2822 if (vap->iv_state != IEEE80211_S_INIT && 2823 (vap->iv_ic->ic_flags & IEEE80211_F_SCAN) == 0) { 2824 /* 2825 * NB: it's safe to specify a timeout as the reason here; 2826 * it'll only be used in the right state. 2827 */ 2828 ieee80211_new_state_locked(vap, IEEE80211_S_SCAN, 2829 IEEE80211_SCAN_FAIL_TIMEOUT); 2830 } 2831 IEEE80211_UNLOCK(vap->iv_ic); 2832} 2833 2834/* 2835 * This is the callback set on net80211-sourced transmitted 2836 * authentication request frames. 2837 * 2838 * This does a couple of things: 2839 * 2840 * + If the frame transmitted was a success, it schedules a future 2841 * event which will transition the interface to scan. 2842 * If a state transition _then_ occurs before that event occurs, 2843 * said state transition will cancel this callout. 2844 * 2845 * + If the frame transmit was a failure, it immediately schedules 2846 * the transition back to scan. 2847 */ 2848static void 2849ieee80211_tx_mgt_cb(struct ieee80211_node *ni, void *arg, int status) 2850{ 2851 struct ieee80211vap *vap = ni->ni_vap; 2852 enum ieee80211_state ostate = (enum ieee80211_state) arg; 2853 2854 /* 2855 * Frame transmit completed; arrange timer callback. If 2856 * transmit was successfuly we wait for response. Otherwise 2857 * we arrange an immediate callback instead of doing the 2858 * callback directly since we don't know what state the driver 2859 * is in (e.g. what locks it is holding). This work should 2860 * not be too time-critical and not happen too often so the 2861 * added overhead is acceptable. 2862 * 2863 * XXX what happens if !acked but response shows up before callback? 2864 */ 2865 if (vap->iv_state == ostate) { 2866 callout_reset(&vap->iv_mgtsend, 2867 status == 0 ? IEEE80211_TRANS_WAIT*hz : 0, 2868 ieee80211_tx_mgt_timeout, vap); 2869 } 2870} 2871 2872static void 2873ieee80211_beacon_construct(struct mbuf *m, uint8_t *frm, 2874 struct ieee80211_node *ni) 2875{ 2876 struct ieee80211vap *vap = ni->ni_vap; 2877 struct ieee80211_beacon_offsets *bo = &vap->iv_bcn_off; 2878 struct ieee80211com *ic = ni->ni_ic; 2879 struct ieee80211_rateset *rs = &ni->ni_rates; 2880 uint16_t capinfo; 2881 2882 /* 2883 * beacon frame format 2884 * [8] time stamp 2885 * [2] beacon interval 2886 * [2] cabability information 2887 * [tlv] ssid 2888 * [tlv] supported rates 2889 * [3] parameter set (DS) 2890 * [8] CF parameter set (optional) 2891 * [tlv] parameter set (IBSS/TIM) 2892 * [tlv] country (optional) 2893 * [3] power control (optional) 2894 * [5] channel switch announcement (CSA) (optional) 2895 * [tlv] extended rate phy (ERP) 2896 * [tlv] extended supported rates 2897 * [tlv] RSN parameters 2898 * [tlv] HT capabilities 2899 * [tlv] HT information 2900 * XXX Vendor-specific OIDs (e.g. Atheros) 2901 * [tlv] WPA parameters 2902 * [tlv] WME parameters 2903 * [tlv] Vendor OUI HT capabilities (optional) 2904 * [tlv] Vendor OUI HT information (optional) 2905 * [tlv] Atheros capabilities (optional) 2906 * [tlv] TDMA parameters (optional) 2907 * [tlv] Mesh ID (MBSS) 2908 * [tlv] Mesh Conf (MBSS) 2909 * [tlv] application data (optional) 2910 */ 2911 2912 memset(bo, 0, sizeof(*bo)); 2913 2914 memset(frm, 0, 8); /* XXX timestamp is set by hardware/driver */ 2915 frm += 8; 2916 *(uint16_t *)frm = htole16(ni->ni_intval); 2917 frm += 2; 2918 capinfo = ieee80211_getcapinfo(vap, ni->ni_chan); 2919 bo->bo_caps = (uint16_t *)frm; 2920 *(uint16_t *)frm = htole16(capinfo); 2921 frm += 2; 2922 *frm++ = IEEE80211_ELEMID_SSID; 2923 if ((vap->iv_flags & IEEE80211_F_HIDESSID) == 0) { 2924 *frm++ = ni->ni_esslen; 2925 memcpy(frm, ni->ni_essid, ni->ni_esslen); 2926 frm += ni->ni_esslen; 2927 } else 2928 *frm++ = 0; 2929 frm = ieee80211_add_rates(frm, rs); 2930 if (!IEEE80211_IS_CHAN_FHSS(ni->ni_chan)) { 2931 *frm++ = IEEE80211_ELEMID_DSPARMS; 2932 *frm++ = 1; 2933 *frm++ = ieee80211_chan2ieee(ic, ni->ni_chan); 2934 } 2935 if (ic->ic_flags & IEEE80211_F_PCF) { 2936 bo->bo_cfp = frm; 2937 frm = ieee80211_add_cfparms(frm, ic); 2938 } 2939 bo->bo_tim = frm; 2940 if (vap->iv_opmode == IEEE80211_M_IBSS) { 2941 *frm++ = IEEE80211_ELEMID_IBSSPARMS; 2942 *frm++ = 2; 2943 *frm++ = 0; *frm++ = 0; /* TODO: ATIM window */ 2944 bo->bo_tim_len = 0; 2945 } else if (vap->iv_opmode == IEEE80211_M_HOSTAP || 2946 vap->iv_opmode == IEEE80211_M_MBSS) { 2947 /* TIM IE is the same for Mesh and Hostap */ 2948 struct ieee80211_tim_ie *tie = (struct ieee80211_tim_ie *) frm; 2949 2950 tie->tim_ie = IEEE80211_ELEMID_TIM; 2951 tie->tim_len = 4; /* length */ 2952 tie->tim_count = 0; /* DTIM count */ 2953 tie->tim_period = vap->iv_dtim_period; /* DTIM period */ 2954 tie->tim_bitctl = 0; /* bitmap control */ 2955 tie->tim_bitmap[0] = 0; /* Partial Virtual Bitmap */ 2956 frm += sizeof(struct ieee80211_tim_ie); 2957 bo->bo_tim_len = 1; 2958 } 2959 bo->bo_tim_trailer = frm; 2960 if ((vap->iv_flags & IEEE80211_F_DOTH) || 2961 (vap->iv_flags_ext & IEEE80211_FEXT_DOTD)) 2962 frm = ieee80211_add_countryie(frm, ic); 2963 if (vap->iv_flags & IEEE80211_F_DOTH) { 2964 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 2965 frm = ieee80211_add_powerconstraint(frm, vap); 2966 bo->bo_csa = frm; 2967 if (ic->ic_flags & IEEE80211_F_CSAPENDING) 2968 frm = ieee80211_add_csa(frm, vap); 2969 } else 2970 bo->bo_csa = frm; 2971 2972 if (vap->iv_flags & IEEE80211_F_DOTH) { 2973 bo->bo_quiet = frm; 2974 if (IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) && 2975 (vap->iv_flags_ext & IEEE80211_FEXT_DFS)) { 2976 if (vap->iv_quiet) 2977 frm = ieee80211_add_quiet(frm,vap); 2978 } 2979 } else 2980 bo->bo_quiet = frm; 2981 2982 if (IEEE80211_IS_CHAN_ANYG(ni->ni_chan)) { 2983 bo->bo_erp = frm; 2984 frm = ieee80211_add_erp(frm, ic); 2985 } 2986 frm = ieee80211_add_xrates(frm, rs); 2987 frm = ieee80211_add_rsn(frm, vap); 2988 if (IEEE80211_IS_CHAN_HT(ni->ni_chan)) { 2989 frm = ieee80211_add_htcap(frm, ni); 2990 bo->bo_htinfo = frm; 2991 frm = ieee80211_add_htinfo(frm, ni); 2992 } 2993 frm = ieee80211_add_wpa(frm, vap); 2994 if (vap->iv_flags & IEEE80211_F_WME) { 2995 bo->bo_wme = frm; 2996 frm = ieee80211_add_wme_param(frm, &ic->ic_wme); 2997 } 2998 if (IEEE80211_IS_CHAN_HT(ni->ni_chan) && 2999 (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT)) { 3000 frm = ieee80211_add_htcap_vendor(frm, ni); 3001 frm = ieee80211_add_htinfo_vendor(frm, ni); 3002 } 3003#ifdef IEEE80211_SUPPORT_SUPERG 3004 if (vap->iv_flags & IEEE80211_F_ATHEROS) { 3005 bo->bo_ath = frm; 3006 frm = ieee80211_add_athcaps(frm, ni); 3007 } 3008#endif 3009#ifdef IEEE80211_SUPPORT_TDMA 3010 if (vap->iv_caps & IEEE80211_C_TDMA) { 3011 bo->bo_tdma = frm; 3012 frm = ieee80211_add_tdma(frm, vap); 3013 } 3014#endif 3015 if (vap->iv_appie_beacon != NULL) { 3016 bo->bo_appie = frm; 3017 bo->bo_appie_len = vap->iv_appie_beacon->ie_len; 3018 frm = add_appie(frm, vap->iv_appie_beacon); 3019 } 3020#ifdef IEEE80211_SUPPORT_MESH 3021 if (vap->iv_opmode == IEEE80211_M_MBSS) { 3022 frm = ieee80211_add_meshid(frm, vap); 3023 bo->bo_meshconf = frm; 3024 frm = ieee80211_add_meshconf(frm, vap); 3025 } 3026#endif 3027 bo->bo_tim_trailer_len = frm - bo->bo_tim_trailer; 3028 bo->bo_csa_trailer_len = frm - bo->bo_csa; 3029 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 3030} 3031 3032/* 3033 * Allocate a beacon frame and fillin the appropriate bits. 3034 */ 3035struct mbuf * 3036ieee80211_beacon_alloc(struct ieee80211_node *ni) 3037{ 3038 struct ieee80211vap *vap = ni->ni_vap; 3039 struct ieee80211com *ic = ni->ni_ic; 3040 struct ifnet *ifp = vap->iv_ifp; 3041 struct ieee80211_frame *wh; 3042 struct mbuf *m; 3043 int pktlen; 3044 uint8_t *frm; 3045 3046 /* 3047 * beacon frame format 3048 * [8] time stamp 3049 * [2] beacon interval 3050 * [2] cabability information 3051 * [tlv] ssid 3052 * [tlv] supported rates 3053 * [3] parameter set (DS) 3054 * [8] CF parameter set (optional) 3055 * [tlv] parameter set (IBSS/TIM) 3056 * [tlv] country (optional) 3057 * [3] power control (optional) 3058 * [5] channel switch announcement (CSA) (optional) 3059 * [tlv] extended rate phy (ERP) 3060 * [tlv] extended supported rates 3061 * [tlv] RSN parameters 3062 * [tlv] HT capabilities 3063 * [tlv] HT information 3064 * [tlv] Vendor OUI HT capabilities (optional) 3065 * [tlv] Vendor OUI HT information (optional) 3066 * XXX Vendor-specific OIDs (e.g. Atheros) 3067 * [tlv] WPA parameters 3068 * [tlv] WME parameters 3069 * [tlv] TDMA parameters (optional) 3070 * [tlv] Mesh ID (MBSS) 3071 * [tlv] Mesh Conf (MBSS) 3072 * [tlv] application data (optional) 3073 * NB: we allocate the max space required for the TIM bitmap. 3074 * XXX how big is this? 3075 */ 3076 pktlen = 8 /* time stamp */ 3077 + sizeof(uint16_t) /* beacon interval */ 3078 + sizeof(uint16_t) /* capabilities */ 3079 + 2 + ni->ni_esslen /* ssid */ 3080 + 2 + IEEE80211_RATE_SIZE /* supported rates */ 3081 + 2 + 1 /* DS parameters */ 3082 + 2 + 6 /* CF parameters */ 3083 + 2 + 4 + vap->iv_tim_len /* DTIM/IBSSPARMS */ 3084 + IEEE80211_COUNTRY_MAX_SIZE /* country */ 3085 + 2 + 1 /* power control */ 3086 + sizeof(struct ieee80211_csa_ie) /* CSA */ 3087 + sizeof(struct ieee80211_quiet_ie) /* Quiet */ 3088 + 2 + 1 /* ERP */ 3089 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 3090 + (vap->iv_caps & IEEE80211_C_WPA ? /* WPA 1+2 */ 3091 2*sizeof(struct ieee80211_ie_wpa) : 0) 3092 /* XXX conditional? */ 3093 + 4+2*sizeof(struct ieee80211_ie_htcap)/* HT caps */ 3094 + 4+2*sizeof(struct ieee80211_ie_htinfo)/* HT info */ 3095 + (vap->iv_caps & IEEE80211_C_WME ? /* WME */ 3096 sizeof(struct ieee80211_wme_param) : 0) 3097#ifdef IEEE80211_SUPPORT_SUPERG 3098 + sizeof(struct ieee80211_ath_ie) /* ATH */ 3099#endif 3100#ifdef IEEE80211_SUPPORT_TDMA 3101 + (vap->iv_caps & IEEE80211_C_TDMA ? /* TDMA */ 3102 sizeof(struct ieee80211_tdma_param) : 0) 3103#endif 3104#ifdef IEEE80211_SUPPORT_MESH 3105 + 2 + ni->ni_meshidlen 3106 + sizeof(struct ieee80211_meshconf_ie) 3107#endif 3108 + IEEE80211_MAX_APPIE 3109 ; 3110 m = ieee80211_getmgtframe(&frm, 3111 ic->ic_headroom + sizeof(struct ieee80211_frame), pktlen); 3112 if (m == NULL) { 3113 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY, 3114 "%s: cannot get buf; size %u\n", __func__, pktlen); 3115 vap->iv_stats.is_tx_nobuf++; 3116 return NULL; 3117 } 3118 ieee80211_beacon_construct(m, frm, ni); 3119 3120 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); 3121 KASSERT(m != NULL, ("no space for 802.11 header?")); 3122 wh = mtod(m, struct ieee80211_frame *); 3123 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT | 3124 IEEE80211_FC0_SUBTYPE_BEACON; 3125 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 3126 *(uint16_t *)wh->i_dur = 0; 3127 IEEE80211_ADDR_COPY(wh->i_addr1, ifp->if_broadcastaddr); 3128 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); 3129 IEEE80211_ADDR_COPY(wh->i_addr3, ni->ni_bssid); 3130 *(uint16_t *)wh->i_seq = 0; 3131 3132 return m; 3133} 3134 3135/* 3136 * Update the dynamic parts of a beacon frame based on the current state. 3137 */ 3138int 3139ieee80211_beacon_update(struct ieee80211_node *ni, struct mbuf *m, int mcast) 3140{ 3141 struct ieee80211vap *vap = ni->ni_vap; 3142 struct ieee80211_beacon_offsets *bo = &vap->iv_bcn_off; 3143 struct ieee80211com *ic = ni->ni_ic; 3144 int len_changed = 0; 3145 uint16_t capinfo; 3146 struct ieee80211_frame *wh; 3147 ieee80211_seq seqno; 3148 3149 IEEE80211_LOCK(ic); 3150 /* 3151 * Handle 11h channel change when we've reached the count. 3152 * We must recalculate the beacon frame contents to account 3153 * for the new channel. Note we do this only for the first 3154 * vap that reaches this point; subsequent vaps just update 3155 * their beacon state to reflect the recalculated channel. 3156 */ 3157 if (isset(bo->bo_flags, IEEE80211_BEACON_CSA) && 3158 vap->iv_csa_count == ic->ic_csa_count) { 3159 vap->iv_csa_count = 0; 3160 /* 3161 * Effect channel change before reconstructing the beacon 3162 * frame contents as many places reference ni_chan. 3163 */ 3164 if (ic->ic_csa_newchan != NULL) 3165 ieee80211_csa_completeswitch(ic); 3166 /* 3167 * NB: ieee80211_beacon_construct clears all pending 3168 * updates in bo_flags so we don't need to explicitly 3169 * clear IEEE80211_BEACON_CSA. 3170 */ 3171 ieee80211_beacon_construct(m, 3172 mtod(m, uint8_t*) + sizeof(struct ieee80211_frame), ni); 3173 3174 /* XXX do WME aggressive mode processing? */ 3175 IEEE80211_UNLOCK(ic); 3176 return 1; /* just assume length changed */ 3177 } 3178 3179 wh = mtod(m, struct ieee80211_frame *); 3180 seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]++; 3181 *(uint16_t *)&wh->i_seq[0] = 3182 htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); 3183 M_SEQNO_SET(m, seqno); 3184 3185 /* XXX faster to recalculate entirely or just changes? */ 3186 capinfo = ieee80211_getcapinfo(vap, ni->ni_chan); 3187 *bo->bo_caps = htole16(capinfo); 3188 3189 if (vap->iv_flags & IEEE80211_F_WME) { 3190 struct ieee80211_wme_state *wme = &ic->ic_wme; 3191 3192 /* 3193 * Check for agressive mode change. When there is 3194 * significant high priority traffic in the BSS 3195 * throttle back BE traffic by using conservative 3196 * parameters. Otherwise BE uses agressive params 3197 * to optimize performance of legacy/non-QoS traffic. 3198 */ 3199 if (wme->wme_flags & WME_F_AGGRMODE) { 3200 if (wme->wme_hipri_traffic > 3201 wme->wme_hipri_switch_thresh) { 3202 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 3203 "%s: traffic %u, disable aggressive mode\n", 3204 __func__, wme->wme_hipri_traffic); 3205 wme->wme_flags &= ~WME_F_AGGRMODE; 3206 ieee80211_wme_updateparams_locked(vap); 3207 wme->wme_hipri_traffic = 3208 wme->wme_hipri_switch_hysteresis; 3209 } else 3210 wme->wme_hipri_traffic = 0; 3211 } else { 3212 if (wme->wme_hipri_traffic <= 3213 wme->wme_hipri_switch_thresh) { 3214 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 3215 "%s: traffic %u, enable aggressive mode\n", 3216 __func__, wme->wme_hipri_traffic); 3217 wme->wme_flags |= WME_F_AGGRMODE; 3218 ieee80211_wme_updateparams_locked(vap); 3219 wme->wme_hipri_traffic = 0; 3220 } else 3221 wme->wme_hipri_traffic = 3222 wme->wme_hipri_switch_hysteresis; 3223 } 3224 if (isset(bo->bo_flags, IEEE80211_BEACON_WME)) { 3225 (void) ieee80211_add_wme_param(bo->bo_wme, wme); 3226 clrbit(bo->bo_flags, IEEE80211_BEACON_WME); 3227 } 3228 } 3229 3230 if (isset(bo->bo_flags, IEEE80211_BEACON_HTINFO)) { 3231 ieee80211_ht_update_beacon(vap, bo); 3232 clrbit(bo->bo_flags, IEEE80211_BEACON_HTINFO); 3233 } 3234#ifdef IEEE80211_SUPPORT_TDMA 3235 if (vap->iv_caps & IEEE80211_C_TDMA) { 3236 /* 3237 * NB: the beacon is potentially updated every TBTT. 3238 */ 3239 ieee80211_tdma_update_beacon(vap, bo); 3240 } 3241#endif 3242#ifdef IEEE80211_SUPPORT_MESH 3243 if (vap->iv_opmode == IEEE80211_M_MBSS) 3244 ieee80211_mesh_update_beacon(vap, bo); 3245#endif 3246 3247 if (vap->iv_opmode == IEEE80211_M_HOSTAP || 3248 vap->iv_opmode == IEEE80211_M_MBSS) { /* NB: no IBSS support*/ 3249 struct ieee80211_tim_ie *tie = 3250 (struct ieee80211_tim_ie *) bo->bo_tim; 3251 if (isset(bo->bo_flags, IEEE80211_BEACON_TIM)) { 3252 u_int timlen, timoff, i; 3253 /* 3254 * ATIM/DTIM needs updating. If it fits in the 3255 * current space allocated then just copy in the 3256 * new bits. Otherwise we need to move any trailing 3257 * data to make room. Note that we know there is 3258 * contiguous space because ieee80211_beacon_allocate 3259 * insures there is space in the mbuf to write a 3260 * maximal-size virtual bitmap (based on iv_max_aid). 3261 */ 3262 /* 3263 * Calculate the bitmap size and offset, copy any 3264 * trailer out of the way, and then copy in the 3265 * new bitmap and update the information element. 3266 * Note that the tim bitmap must contain at least 3267 * one byte and any offset must be even. 3268 */ 3269 if (vap->iv_ps_pending != 0) { 3270 timoff = 128; /* impossibly large */ 3271 for (i = 0; i < vap->iv_tim_len; i++) 3272 if (vap->iv_tim_bitmap[i]) { 3273 timoff = i &~ 1; 3274 break; 3275 } 3276 KASSERT(timoff != 128, ("tim bitmap empty!")); 3277 for (i = vap->iv_tim_len-1; i >= timoff; i--) 3278 if (vap->iv_tim_bitmap[i]) 3279 break; 3280 timlen = 1 + (i - timoff); 3281 } else { 3282 timoff = 0; 3283 timlen = 1; 3284 } 3285 if (timlen != bo->bo_tim_len) { 3286 /* copy up/down trailer */ 3287 int adjust = tie->tim_bitmap+timlen 3288 - bo->bo_tim_trailer; 3289 ovbcopy(bo->bo_tim_trailer, 3290 bo->bo_tim_trailer+adjust, 3291 bo->bo_tim_trailer_len); 3292 bo->bo_tim_trailer += adjust; 3293 bo->bo_erp += adjust; 3294 bo->bo_htinfo += adjust; 3295#ifdef IEEE80211_SUPPORT_SUPERG 3296 bo->bo_ath += adjust; 3297#endif 3298#ifdef IEEE80211_SUPPORT_TDMA 3299 bo->bo_tdma += adjust; 3300#endif 3301#ifdef IEEE80211_SUPPORT_MESH 3302 bo->bo_meshconf += adjust; 3303#endif 3304 bo->bo_appie += adjust; 3305 bo->bo_wme += adjust; 3306 bo->bo_csa += adjust; 3307 bo->bo_quiet += adjust; 3308 bo->bo_tim_len = timlen; 3309 3310 /* update information element */ 3311 tie->tim_len = 3 + timlen; 3312 tie->tim_bitctl = timoff; 3313 len_changed = 1; 3314 } 3315 memcpy(tie->tim_bitmap, vap->iv_tim_bitmap + timoff, 3316 bo->bo_tim_len); 3317 3318 clrbit(bo->bo_flags, IEEE80211_BEACON_TIM); 3319 3320 IEEE80211_DPRINTF(vap, IEEE80211_MSG_POWER, 3321 "%s: TIM updated, pending %u, off %u, len %u\n", 3322 __func__, vap->iv_ps_pending, timoff, timlen); 3323 } 3324 /* count down DTIM period */ 3325 if (tie->tim_count == 0) 3326 tie->tim_count = tie->tim_period - 1; 3327 else 3328 tie->tim_count--; 3329 /* update state for buffered multicast frames on DTIM */ 3330 if (mcast && tie->tim_count == 0) 3331 tie->tim_bitctl |= 1; 3332 else 3333 tie->tim_bitctl &= ~1; 3334 if (isset(bo->bo_flags, IEEE80211_BEACON_CSA)) { 3335 struct ieee80211_csa_ie *csa = 3336 (struct ieee80211_csa_ie *) bo->bo_csa; 3337 3338 /* 3339 * Insert or update CSA ie. If we're just starting 3340 * to count down to the channel switch then we need 3341 * to insert the CSA ie. Otherwise we just need to 3342 * drop the count. The actual change happens above 3343 * when the vap's count reaches the target count. 3344 */ 3345 if (vap->iv_csa_count == 0) { 3346 memmove(&csa[1], csa, bo->bo_csa_trailer_len); 3347 bo->bo_erp += sizeof(*csa); 3348 bo->bo_htinfo += sizeof(*csa); 3349 bo->bo_wme += sizeof(*csa); 3350#ifdef IEEE80211_SUPPORT_SUPERG 3351 bo->bo_ath += sizeof(*csa); 3352#endif 3353#ifdef IEEE80211_SUPPORT_TDMA 3354 bo->bo_tdma += sizeof(*csa); 3355#endif 3356#ifdef IEEE80211_SUPPORT_MESH 3357 bo->bo_meshconf += sizeof(*csa); 3358#endif 3359 bo->bo_appie += sizeof(*csa); 3360 bo->bo_csa_trailer_len += sizeof(*csa); 3361 bo->bo_quiet += sizeof(*csa); 3362 bo->bo_tim_trailer_len += sizeof(*csa); 3363 m->m_len += sizeof(*csa); 3364 m->m_pkthdr.len += sizeof(*csa); 3365 3366 ieee80211_add_csa(bo->bo_csa, vap); 3367 } else 3368 csa->csa_count--; 3369 vap->iv_csa_count++; 3370 /* NB: don't clear IEEE80211_BEACON_CSA */ 3371 } 3372 if (IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) && 3373 (vap->iv_flags_ext & IEEE80211_FEXT_DFS) ){ 3374 if (vap->iv_quiet) 3375 ieee80211_add_quiet(bo->bo_quiet, vap); 3376 } 3377 if (isset(bo->bo_flags, IEEE80211_BEACON_ERP)) { 3378 /* 3379 * ERP element needs updating. 3380 */ 3381 (void) ieee80211_add_erp(bo->bo_erp, ic); 3382 clrbit(bo->bo_flags, IEEE80211_BEACON_ERP); 3383 } 3384#ifdef IEEE80211_SUPPORT_SUPERG 3385 if (isset(bo->bo_flags, IEEE80211_BEACON_ATH)) { 3386 ieee80211_add_athcaps(bo->bo_ath, ni); 3387 clrbit(bo->bo_flags, IEEE80211_BEACON_ATH); 3388 } 3389#endif 3390 } 3391 if (isset(bo->bo_flags, IEEE80211_BEACON_APPIE)) { 3392 const struct ieee80211_appie *aie = vap->iv_appie_beacon; 3393 int aielen; 3394 uint8_t *frm; 3395 3396 aielen = 0; 3397 if (aie != NULL) 3398 aielen += aie->ie_len; 3399 if (aielen != bo->bo_appie_len) { 3400 /* copy up/down trailer */ 3401 int adjust = aielen - bo->bo_appie_len; 3402 ovbcopy(bo->bo_tim_trailer, bo->bo_tim_trailer+adjust, 3403 bo->bo_tim_trailer_len); 3404 bo->bo_tim_trailer += adjust; 3405 bo->bo_appie += adjust; 3406 bo->bo_appie_len = aielen; 3407 3408 len_changed = 1; 3409 } 3410 frm = bo->bo_appie; 3411 if (aie != NULL) 3412 frm = add_appie(frm, aie); 3413 clrbit(bo->bo_flags, IEEE80211_BEACON_APPIE); 3414 } 3415 IEEE80211_UNLOCK(ic); 3416 3417 return len_changed; 3418} 3419 3420/* 3421 * Do Ethernet-LLC encapsulation for each payload in a fast frame 3422 * tunnel encapsulation. The frame is assumed to have an Ethernet 3423 * header at the front that must be stripped before prepending the 3424 * LLC followed by the Ethernet header passed in (with an Ethernet 3425 * type that specifies the payload size). 3426 */ 3427struct mbuf * 3428ieee80211_ff_encap1(struct ieee80211vap *vap, struct mbuf *m, 3429 const struct ether_header *eh) 3430{ 3431 struct llc *llc; 3432 uint16_t payload; 3433 3434 /* XXX optimize by combining m_adj+M_PREPEND */ 3435 m_adj(m, sizeof(struct ether_header) - sizeof(struct llc)); 3436 llc = mtod(m, struct llc *); 3437 llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP; 3438 llc->llc_control = LLC_UI; 3439 llc->llc_snap.org_code[0] = 0; 3440 llc->llc_snap.org_code[1] = 0; 3441 llc->llc_snap.org_code[2] = 0; 3442 llc->llc_snap.ether_type = eh->ether_type; 3443 payload = m->m_pkthdr.len; /* NB: w/o Ethernet header */ 3444 3445 M_PREPEND(m, sizeof(struct ether_header), M_NOWAIT); 3446 if (m == NULL) { /* XXX cannot happen */ 3447 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG, 3448 "%s: no space for ether_header\n", __func__); 3449 vap->iv_stats.is_tx_nobuf++; 3450 return NULL; 3451 } 3452 ETHER_HEADER_COPY(mtod(m, void *), eh); 3453 mtod(m, struct ether_header *)->ether_type = htons(payload); 3454 return m; 3455} 3456 3457/* 3458 * Complete an mbuf transmission. 3459 * 3460 * For now, this simply processes a completed frame after the 3461 * driver has completed it's transmission and/or retransmission. 3462 * It assumes the frame is an 802.11 encapsulated frame. 3463 * 3464 * Later on it will grow to become the exit path for a given frame 3465 * from the driver and, depending upon how it's been encapsulated 3466 * and already transmitted, it may end up doing A-MPDU retransmission, 3467 * power save requeuing, etc. 3468 * 3469 * In order for the above to work, the driver entry point to this 3470 * must not hold any driver locks. Thus, the driver needs to delay 3471 * any actual mbuf completion until it can release said locks. 3472 * 3473 * This frees the mbuf and if the mbuf has a node reference, 3474 * the node reference will be freed. 3475 */ 3476void 3477ieee80211_tx_complete(struct ieee80211_node *ni, struct mbuf *m, int status) 3478{ 3479 3480 if (ni != NULL) { 3481 struct ifnet *ifp = ni->ni_vap->iv_ifp; 3482 3483 if (status == 0) { 3484 if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len); 3485 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1); 3486 if (m->m_flags & M_MCAST) 3487 if_inc_counter(ifp, IFCOUNTER_OMCASTS, 1); 3488 } else 3489 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 3490 if (m->m_flags & M_TXCB) 3491 ieee80211_process_callback(ni, m, status); 3492 ieee80211_free_node(ni); 3493 } 3494 m_freem(m); 3495} 3496