ieee80211_output.c revision 191536
1116742Ssam/*- 2116904Ssam * Copyright (c) 2001 Atsushi Onoe 3186904Ssam * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting 4116742Ssam * All rights reserved. 5116742Ssam * 6116742Ssam * Redistribution and use in source and binary forms, with or without 7116742Ssam * modification, are permitted provided that the following conditions 8116742Ssam * are met: 9116742Ssam * 1. Redistributions of source code must retain the above copyright 10116904Ssam * notice, this list of conditions and the following disclaimer. 11116904Ssam * 2. Redistributions in binary form must reproduce the above copyright 12116904Ssam * notice, this list of conditions and the following disclaimer in the 13116904Ssam * documentation and/or other materials provided with the distribution. 14116742Ssam * 15116904Ssam * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16116904Ssam * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17116904Ssam * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18116904Ssam * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19116904Ssam * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20116904Ssam * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21116904Ssam * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22116904Ssam * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23116904Ssam * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24116904Ssam * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25116742Ssam */ 26116742Ssam 27116742Ssam#include <sys/cdefs.h> 28116742Ssam__FBSDID("$FreeBSD: head/sys/net80211/ieee80211_output.c 191536 2009-04-26 21:11:12Z sam $"); 29116742Ssam 30116742Ssam#include "opt_inet.h" 31178354Ssam#include "opt_wlan.h" 32116742Ssam 33116742Ssam#include <sys/param.h> 34116742Ssam#include <sys/systm.h> 35116742Ssam#include <sys/mbuf.h> 36116742Ssam#include <sys/kernel.h> 37116742Ssam#include <sys/endian.h> 38116742Ssam 39138568Ssam#include <sys/socket.h> 40116742Ssam 41138568Ssam#include <net/bpf.h> 42138568Ssam#include <net/ethernet.h> 43116742Ssam#include <net/if.h> 44138568Ssam#include <net/if_llc.h> 45116742Ssam#include <net/if_media.h> 46138568Ssam#include <net/if_vlan_var.h> 47116742Ssam 48116742Ssam#include <net80211/ieee80211_var.h> 49170530Ssam#include <net80211/ieee80211_regdomain.h> 50190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 51190391Ssam#include <net80211/ieee80211_superg.h> 52190391Ssam#endif 53186904Ssam#ifdef IEEE80211_SUPPORT_TDMA 54186904Ssam#include <net80211/ieee80211_tdma.h> 55186904Ssam#endif 56178354Ssam#include <net80211/ieee80211_wds.h> 57116742Ssam 58116742Ssam#ifdef INET 59116742Ssam#include <netinet/in.h> 60116742Ssam#include <netinet/if_ether.h> 61138568Ssam#include <netinet/in_systm.h> 62138568Ssam#include <netinet/ip.h> 63116742Ssam#endif 64116742Ssam 65170530Ssam#define ETHER_HEADER_COPY(dst, src) \ 66170530Ssam memcpy(dst, src, sizeof(struct ether_header)) 67170530Ssam 68178354Ssamstatic int ieee80211_fragment(struct ieee80211vap *, struct mbuf *, 69170530Ssam u_int hdrsize, u_int ciphdrsize, u_int mtu); 70170530Ssamstatic void ieee80211_tx_mgt_cb(struct ieee80211_node *, void *, int); 71170530Ssam 72138568Ssam#ifdef IEEE80211_DEBUG 73119150Ssam/* 74138568Ssam * Decide if an outbound management frame should be 75138568Ssam * printed when debugging is enabled. This filters some 76138568Ssam * of the less interesting frames that come frequently 77138568Ssam * (e.g. beacons). 78138568Ssam */ 79138568Ssamstatic __inline int 80178354Ssamdoprint(struct ieee80211vap *vap, int subtype) 81138568Ssam{ 82138568Ssam switch (subtype) { 83138568Ssam case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 84178354Ssam return (vap->iv_opmode == IEEE80211_M_IBSS); 85138568Ssam } 86138568Ssam return 1; 87138568Ssam} 88138568Ssam#endif 89138568Ssam 90138568Ssam/* 91178354Ssam * Start method for vap's. All packets from the stack come 92178354Ssam * through here. We handle common processing of the packets 93178354Ssam * before dispatching them to the underlying device. 94178354Ssam */ 95178354Ssamvoid 96178354Ssamieee80211_start(struct ifnet *ifp) 97178354Ssam{ 98178354Ssam#define IS_DWDS(vap) \ 99178354Ssam (vap->iv_opmode == IEEE80211_M_WDS && \ 100178354Ssam (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) == 0) 101178354Ssam struct ieee80211vap *vap = ifp->if_softc; 102178354Ssam struct ieee80211com *ic = vap->iv_ic; 103178354Ssam struct ifnet *parent = ic->ic_ifp; 104178354Ssam struct ieee80211_node *ni; 105178354Ssam struct mbuf *m; 106178354Ssam struct ether_header *eh; 107178354Ssam int error; 108178354Ssam 109178354Ssam /* NB: parent must be up and running */ 110178354Ssam if (!IFNET_IS_UP_RUNNING(parent)) { 111178354Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 112178354Ssam "%s: ignore queue, parent %s not up+running\n", 113178354Ssam __func__, parent->if_xname); 114178354Ssam /* XXX stat */ 115178354Ssam return; 116178354Ssam } 117178354Ssam if (vap->iv_state == IEEE80211_S_SLEEP) { 118178354Ssam /* 119178354Ssam * In power save, wakeup device for transmit. 120178354Ssam */ 121178354Ssam ieee80211_new_state(vap, IEEE80211_S_RUN, 0); 122178354Ssam return; 123178354Ssam } 124178354Ssam /* 125178354Ssam * No data frames go out unless we're running. 126178354Ssam * Note in particular this covers CAC and CSA 127178354Ssam * states (though maybe we should check muting 128178354Ssam * for CSA). 129178354Ssam */ 130178354Ssam if (vap->iv_state != IEEE80211_S_RUN) { 131178354Ssam IEEE80211_LOCK(ic); 132178354Ssam /* re-check under the com lock to avoid races */ 133178354Ssam if (vap->iv_state != IEEE80211_S_RUN) { 134178354Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 135178354Ssam "%s: ignore queue, in %s state\n", 136178354Ssam __func__, ieee80211_state_name[vap->iv_state]); 137178354Ssam vap->iv_stats.is_tx_badstate++; 138178354Ssam ifp->if_drv_flags |= IFF_DRV_OACTIVE; 139178354Ssam IEEE80211_UNLOCK(ic); 140178354Ssam return; 141178354Ssam } 142178354Ssam IEEE80211_UNLOCK(ic); 143178354Ssam } 144178354Ssam for (;;) { 145178354Ssam IFQ_DEQUEUE(&ifp->if_snd, m); 146178354Ssam if (m == NULL) 147178354Ssam break; 148178354Ssam /* 149178354Ssam * Sanitize mbuf flags for net80211 use. We cannot 150178354Ssam * clear M_PWR_SAV because this may be set for frames 151178354Ssam * that are re-submitted from the power save queue. 152178354Ssam * 153178354Ssam * NB: This must be done before ieee80211_classify as 154178354Ssam * it marks EAPOL in frames with M_EAPOL. 155178354Ssam */ 156178354Ssam m->m_flags &= ~(M_80211_TX - M_PWR_SAV); 157178354Ssam /* 158178354Ssam * Cancel any background scan. 159178354Ssam */ 160178354Ssam if (ic->ic_flags & IEEE80211_F_SCAN) 161178354Ssam ieee80211_cancel_anyscan(vap); 162178354Ssam /* 163178354Ssam * Find the node for the destination so we can do 164178354Ssam * things like power save and fast frames aggregation. 165178354Ssam * 166178354Ssam * NB: past this point various code assumes the first 167178354Ssam * mbuf has the 802.3 header present (and contiguous). 168178354Ssam */ 169178354Ssam ni = NULL; 170178354Ssam if (m->m_len < sizeof(struct ether_header) && 171178354Ssam (m = m_pullup(m, sizeof(struct ether_header))) == NULL) { 172178354Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 173178354Ssam "discard frame, %s\n", "m_pullup failed"); 174178354Ssam vap->iv_stats.is_tx_nobuf++; /* XXX */ 175178354Ssam ifp->if_oerrors++; 176178354Ssam continue; 177178354Ssam } 178178354Ssam eh = mtod(m, struct ether_header *); 179178354Ssam if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 180178354Ssam if (IS_DWDS(vap)) { 181178354Ssam /* 182178354Ssam * Only unicast frames from the above go out 183178354Ssam * DWDS vaps; multicast frames are handled by 184178354Ssam * dispatching the frame as it comes through 185178354Ssam * the AP vap (see below). 186178354Ssam */ 187178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_WDS, 188178354Ssam eh->ether_dhost, "mcast", "%s", "on DWDS"); 189178354Ssam vap->iv_stats.is_dwds_mcast++; 190178354Ssam m_freem(m); 191178354Ssam continue; 192178354Ssam } 193178354Ssam if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 194178354Ssam /* 195178354Ssam * Spam DWDS vap's w/ multicast traffic. 196178354Ssam */ 197178354Ssam /* XXX only if dwds in use? */ 198178354Ssam ieee80211_dwds_mcast(vap, m); 199178354Ssam } 200178354Ssam } 201178354Ssam ni = ieee80211_find_txnode(vap, eh->ether_dhost); 202178354Ssam if (ni == NULL) { 203178354Ssam /* NB: ieee80211_find_txnode does stat+msg */ 204178354Ssam ifp->if_oerrors++; 205178354Ssam m_freem(m); 206178354Ssam continue; 207178354Ssam } 208184271Ssam if (ni->ni_associd == 0 && 209186099Ssam (ni->ni_flags & IEEE80211_NODE_ASSOCID)) { 210184271Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_OUTPUT, 211184271Ssam eh->ether_dhost, NULL, 212184271Ssam "sta not associated (type 0x%04x)", 213184271Ssam htons(eh->ether_type)); 214184271Ssam vap->iv_stats.is_tx_notassoc++; 215184271Ssam ifp->if_oerrors++; 216184271Ssam m_freem(m); 217184271Ssam ieee80211_free_node(ni); 218184271Ssam continue; 219178354Ssam } 220190579Ssam 221178354Ssam if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) && 222178354Ssam (m->m_flags & M_PWR_SAV) == 0) { 223178354Ssam /* 224178354Ssam * Station in power save mode; pass the frame 225178354Ssam * to the 802.11 layer and continue. We'll get 226178354Ssam * the frame back when the time is right. 227178354Ssam * XXX lose WDS vap linkage? 228178354Ssam */ 229184288Ssam (void) ieee80211_pwrsave(ni, m); 230178354Ssam ieee80211_free_node(ni); 231178354Ssam continue; 232178354Ssam } 233178354Ssam /* calculate priority so drivers can find the tx queue */ 234178354Ssam if (ieee80211_classify(ni, m)) { 235178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_OUTPUT, 236178354Ssam eh->ether_dhost, NULL, 237178354Ssam "%s", "classification failure"); 238178354Ssam vap->iv_stats.is_tx_classify++; 239178354Ssam ifp->if_oerrors++; 240178354Ssam m_freem(m); 241178354Ssam ieee80211_free_node(ni); 242178354Ssam continue; 243178354Ssam } 244178354Ssam 245190579Ssam BPF_MTAP(ifp, m); /* 802.3 tx */ 246190579Ssam 247190579Ssam#ifdef IEEE80211_SUPPORT_SUPERG 248190579Ssam if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF)) { 249190579Ssam m = ieee80211_ff_check(ni, m); 250190579Ssam if (m == NULL) { 251190579Ssam /* NB: any ni ref held on stageq */ 252190579Ssam continue; 253190579Ssam } 254190579Ssam } 255190579Ssam#endif /* IEEE80211_SUPPORT_SUPERG */ 256190850Ssam if (__predict_true((vap->iv_caps & IEEE80211_C_8023ENCAP) == 0)) { 257190850Ssam /* 258190850Ssam * Encapsulate the packet in prep for transmission. 259190850Ssam */ 260190850Ssam m = ieee80211_encap(vap, ni, m); 261190850Ssam if (m == NULL) { 262190850Ssam /* NB: stat+msg handled in ieee80211_encap */ 263190850Ssam ieee80211_free_node(ni); 264190850Ssam continue; 265190850Ssam } 266190579Ssam } 267178354Ssam 268178354Ssam /* 269178354Ssam * Stash the node pointer and hand the frame off to 270178354Ssam * the underlying device. Note that we do this after 271178354Ssam * any call to ieee80211_dwds_mcast because that code 272178354Ssam * uses any existing value for rcvif. 273178354Ssam */ 274178354Ssam m->m_pkthdr.rcvif = (void *)ni; 275178354Ssam 276186658Ssam error = parent->if_transmit(parent, m); 277178354Ssam if (error != 0) { 278178354Ssam /* NB: IFQ_HANDOFF reclaims mbuf */ 279178354Ssam ieee80211_free_node(ni); 280178354Ssam } else { 281178354Ssam ifp->if_opackets++; 282178354Ssam } 283178354Ssam ic->ic_lastdata = ticks; 284178354Ssam } 285178354Ssam#undef IS_DWDS 286178354Ssam} 287178354Ssam 288178354Ssam/* 289178354Ssam * 802.11 output routine. This is (currently) used only to 290178354Ssam * connect bpf write calls to the 802.11 layer for injecting 291178354Ssam * raw 802.11 frames. Note we locate the ieee80211com from 292178354Ssam * the ifnet using a spare field setup at attach time. This 293178354Ssam * will go away when the virtual ap support comes in. 294178354Ssam */ 295178354Ssamint 296178354Ssamieee80211_output(struct ifnet *ifp, struct mbuf *m, 297191148Skmacy struct sockaddr *dst, struct route *ro) 298178354Ssam{ 299178354Ssam#define senderr(e) do { error = (e); goto bad;} while (0) 300178354Ssam struct ieee80211_node *ni = NULL; 301178354Ssam struct ieee80211vap *vap; 302178354Ssam struct ieee80211_frame *wh; 303178354Ssam int error; 304178354Ssam 305178354Ssam if (ifp->if_drv_flags & IFF_DRV_OACTIVE) { 306178354Ssam /* 307178354Ssam * Short-circuit requests if the vap is marked OACTIVE 308178354Ssam * as this is used when tearing down state to indicate 309178354Ssam * the vap may be gone. This can also happen because a 310178354Ssam * packet came down through ieee80211_start before the 311178354Ssam * vap entered RUN state in which case it's also ok to 312178354Ssam * just drop the frame. This should not be necessary 313178354Ssam * but callers of if_output don't check OACTIVE. 314178354Ssam */ 315178354Ssam senderr(ENETDOWN); 316178354Ssam } 317178354Ssam vap = ifp->if_softc; 318178354Ssam /* 319178354Ssam * Hand to the 802.3 code if not tagged as 320178354Ssam * a raw 802.11 frame. 321178354Ssam */ 322178354Ssam if (dst->sa_family != AF_IEEE80211) 323191148Skmacy return vap->iv_output(ifp, m, dst, ro); 324178354Ssam#ifdef MAC 325178354Ssam error = mac_check_ifnet_transmit(ifp, m); 326178354Ssam if (error) 327178354Ssam senderr(error); 328178354Ssam#endif 329178354Ssam if (ifp->if_flags & IFF_MONITOR) 330178354Ssam senderr(ENETDOWN); 331178354Ssam if (!IFNET_IS_UP_RUNNING(ifp)) 332178354Ssam senderr(ENETDOWN); 333178354Ssam if (vap->iv_state == IEEE80211_S_CAC) { 334178354Ssam IEEE80211_DPRINTF(vap, 335178354Ssam IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH, 336178354Ssam "block %s frame in CAC state\n", "raw data"); 337178354Ssam vap->iv_stats.is_tx_badstate++; 338178354Ssam senderr(EIO); /* XXX */ 339178354Ssam } 340178354Ssam /* XXX bypass bridge, pfil, carp, etc. */ 341178354Ssam 342178354Ssam if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_ack)) 343178354Ssam senderr(EIO); /* XXX */ 344178354Ssam wh = mtod(m, struct ieee80211_frame *); 345178354Ssam if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 346178354Ssam IEEE80211_FC0_VERSION_0) 347178354Ssam senderr(EIO); /* XXX */ 348178354Ssam 349178354Ssam /* locate destination node */ 350178354Ssam switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) { 351178354Ssam case IEEE80211_FC1_DIR_NODS: 352178354Ssam case IEEE80211_FC1_DIR_FROMDS: 353178354Ssam ni = ieee80211_find_txnode(vap, wh->i_addr1); 354178354Ssam break; 355178354Ssam case IEEE80211_FC1_DIR_TODS: 356178354Ssam case IEEE80211_FC1_DIR_DSTODS: 357178354Ssam if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) 358178354Ssam senderr(EIO); /* XXX */ 359178354Ssam ni = ieee80211_find_txnode(vap, wh->i_addr3); 360178354Ssam break; 361178354Ssam default: 362178354Ssam senderr(EIO); /* XXX */ 363178354Ssam } 364178354Ssam if (ni == NULL) { 365178354Ssam /* 366178354Ssam * Permit packets w/ bpf params through regardless 367178354Ssam * (see below about sa_len). 368178354Ssam */ 369178354Ssam if (dst->sa_len == 0) 370178354Ssam senderr(EHOSTUNREACH); 371178354Ssam ni = ieee80211_ref_node(vap->iv_bss); 372178354Ssam } 373178354Ssam 374178354Ssam /* 375178354Ssam * Sanitize mbuf for net80211 flags leaked from above. 376178354Ssam * 377178354Ssam * NB: This must be done before ieee80211_classify as 378178354Ssam * it marks EAPOL in frames with M_EAPOL. 379178354Ssam */ 380178354Ssam m->m_flags &= ~M_80211_TX; 381178354Ssam 382178354Ssam /* calculate priority so drivers can find the tx queue */ 383178354Ssam /* XXX assumes an 802.3 frame */ 384178354Ssam if (ieee80211_classify(ni, m)) 385178354Ssam senderr(EIO); /* XXX */ 386178354Ssam 387191536Ssam if (bpf_peers_present(vap->iv_rawbpf)) 388191536Ssam bpf_mtap(vap->iv_rawbpf, m); 389178354Ssam 390191536Ssam IEEE80211_NODE_STAT(ni, tx_data); 391191536Ssam if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 392191536Ssam IEEE80211_NODE_STAT(ni, tx_mcast); 393191536Ssam m->m_flags |= M_MCAST; 394191536Ssam } else 395191536Ssam IEEE80211_NODE_STAT(ni, tx_ucast); 396191536Ssam /* NB: ieee80211_encap does not include 802.11 header */ 397191536Ssam IEEE80211_NODE_STAT_ADD(ni, tx_bytes, m->m_pkthdr.len); 398191536Ssam 399178354Ssam /* 400178354Ssam * NB: DLT_IEEE802_11_RADIO identifies the parameters are 401178354Ssam * present by setting the sa_len field of the sockaddr (yes, 402178354Ssam * this is a hack). 403178354Ssam * NB: we assume sa_data is suitably aligned to cast. 404178354Ssam */ 405178354Ssam return vap->iv_ic->ic_raw_xmit(ni, m, 406178354Ssam (const struct ieee80211_bpf_params *)(dst->sa_len ? 407178354Ssam dst->sa_data : NULL)); 408178354Ssambad: 409178354Ssam if (m != NULL) 410178354Ssam m_freem(m); 411178354Ssam if (ni != NULL) 412178354Ssam ieee80211_free_node(ni); 413178354Ssam return error; 414178354Ssam#undef senderr 415178354Ssam} 416178354Ssam 417178354Ssam/* 418148314Ssam * Set the direction field and address fields of an outgoing 419184285Ssam * frame. Note this should be called early on in constructing 420184285Ssam * a frame as it sets i_fc[1]; other bits can then be or'd in. 421148314Ssam */ 422148314Ssamstatic void 423178354Ssamieee80211_send_setup( 424148314Ssam struct ieee80211_node *ni, 425148314Ssam struct ieee80211_frame *wh, 426184282Ssam int type, int tid, 427170530Ssam const uint8_t sa[IEEE80211_ADDR_LEN], 428170530Ssam const uint8_t da[IEEE80211_ADDR_LEN], 429170530Ssam const uint8_t bssid[IEEE80211_ADDR_LEN]) 430148314Ssam{ 431148314Ssam#define WH4(wh) ((struct ieee80211_frame_addr4 *)wh) 432148314Ssam 433148314Ssam wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | type; 434148314Ssam if ((type & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_DATA) { 435178354Ssam struct ieee80211vap *vap = ni->ni_vap; 436178354Ssam 437178354Ssam switch (vap->iv_opmode) { 438148314Ssam case IEEE80211_M_STA: 439148314Ssam wh->i_fc[1] = IEEE80211_FC1_DIR_TODS; 440148314Ssam IEEE80211_ADDR_COPY(wh->i_addr1, bssid); 441148314Ssam IEEE80211_ADDR_COPY(wh->i_addr2, sa); 442148314Ssam IEEE80211_ADDR_COPY(wh->i_addr3, da); 443148314Ssam break; 444148314Ssam case IEEE80211_M_IBSS: 445148314Ssam case IEEE80211_M_AHDEMO: 446148314Ssam wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 447148314Ssam IEEE80211_ADDR_COPY(wh->i_addr1, da); 448148314Ssam IEEE80211_ADDR_COPY(wh->i_addr2, sa); 449148314Ssam IEEE80211_ADDR_COPY(wh->i_addr3, bssid); 450148314Ssam break; 451148314Ssam case IEEE80211_M_HOSTAP: 452148314Ssam wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS; 453148314Ssam IEEE80211_ADDR_COPY(wh->i_addr1, da); 454148314Ssam IEEE80211_ADDR_COPY(wh->i_addr2, bssid); 455148314Ssam IEEE80211_ADDR_COPY(wh->i_addr3, sa); 456148314Ssam break; 457170530Ssam case IEEE80211_M_WDS: 458170530Ssam wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS; 459178354Ssam IEEE80211_ADDR_COPY(wh->i_addr1, da); 460178354Ssam IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); 461170530Ssam IEEE80211_ADDR_COPY(wh->i_addr3, da); 462170530Ssam IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, sa); 463170530Ssam break; 464148314Ssam case IEEE80211_M_MONITOR: /* NB: to quiet compiler */ 465148314Ssam break; 466148314Ssam } 467148314Ssam } else { 468148314Ssam wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 469148314Ssam IEEE80211_ADDR_COPY(wh->i_addr1, da); 470148314Ssam IEEE80211_ADDR_COPY(wh->i_addr2, sa); 471148314Ssam IEEE80211_ADDR_COPY(wh->i_addr3, bssid); 472148314Ssam } 473170530Ssam *(uint16_t *)&wh->i_dur[0] = 0; 474170530Ssam *(uint16_t *)&wh->i_seq[0] = 475184282Ssam htole16(ni->ni_txseqs[tid] << IEEE80211_SEQ_SEQ_SHIFT); 476184282Ssam ni->ni_txseqs[tid]++; 477148314Ssam#undef WH4 478148314Ssam} 479148314Ssam 480148314Ssam/* 481119150Ssam * Send a management frame to the specified node. The node pointer 482119150Ssam * must have a reference as the pointer will be passed to the driver 483119150Ssam * and potentially held for a long time. If the frame is successfully 484119150Ssam * dispatched to the driver, then it is responsible for freeing the 485178354Ssam * reference (and potentially free'ing up any associated storage); 486178354Ssam * otherwise deal with reclaiming any reference (on error). 487119150Ssam */ 488170530Ssamint 489184282Ssamieee80211_mgmt_output(struct ieee80211_node *ni, struct mbuf *m, int type, 490184282Ssam struct ieee80211_bpf_params *params) 491116742Ssam{ 492178354Ssam struct ieee80211vap *vap = ni->ni_vap; 493178354Ssam struct ieee80211com *ic = ni->ni_ic; 494116742Ssam struct ieee80211_frame *wh; 495116742Ssam 496119150Ssam KASSERT(ni != NULL, ("null node")); 497116742Ssam 498178354Ssam if (vap->iv_state == IEEE80211_S_CAC) { 499178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH, 500178354Ssam ni, "block %s frame in CAC state", 501178354Ssam ieee80211_mgt_subtype_name[ 502178354Ssam (type & IEEE80211_FC0_SUBTYPE_MASK) >> 503178354Ssam IEEE80211_FC0_SUBTYPE_SHIFT]); 504178354Ssam vap->iv_stats.is_tx_badstate++; 505178354Ssam ieee80211_free_node(ni); 506178354Ssam m_freem(m); 507178354Ssam return EIO; /* XXX */ 508178354Ssam } 509178354Ssam 510116742Ssam M_PREPEND(m, sizeof(struct ieee80211_frame), M_DONTWAIT); 511178354Ssam if (m == NULL) { 512178354Ssam ieee80211_free_node(ni); 513116742Ssam return ENOMEM; 514178354Ssam } 515119150Ssam 516116742Ssam wh = mtod(m, struct ieee80211_frame *); 517184282Ssam ieee80211_send_setup(ni, wh, 518184282Ssam IEEE80211_FC0_TYPE_MGT | type, IEEE80211_NONQOS_TID, 519184282Ssam vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid); 520184282Ssam if (params->ibp_flags & IEEE80211_BPF_CRYPTO) { 521178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr1, 522178354Ssam "encrypting frame (%s)", __func__); 523138568Ssam wh->i_fc[1] |= IEEE80211_FC1_WEP; 524138568Ssam } 525184286Ssam m->m_flags |= M_ENCAP; /* mark encapsulated */ 526184282Ssam 527184282Ssam KASSERT(type != IEEE80211_FC0_SUBTYPE_PROBE_RESP, ("probe response?")); 528184282Ssam M_WME_SETAC(m, params->ibp_pri); 529184282Ssam 530116742Ssam#ifdef IEEE80211_DEBUG 531138568Ssam /* avoid printing too many frames */ 532178354Ssam if ((ieee80211_msg_debug(vap) && doprint(vap, type)) || 533178354Ssam ieee80211_msg_dumppkts(vap)) { 534138568Ssam printf("[%s] send %s on channel %u\n", 535138568Ssam ether_sprintf(wh->i_addr1), 536138568Ssam ieee80211_mgt_subtype_name[ 537138568Ssam (type & IEEE80211_FC0_SUBTYPE_MASK) >> 538138568Ssam IEEE80211_FC0_SUBTYPE_SHIFT], 539148936Ssam ieee80211_chan2ieee(ic, ic->ic_curchan)); 540138568Ssam } 541116742Ssam#endif 542138568Ssam IEEE80211_NODE_STAT(ni, tx_mgmt); 543170530Ssam 544184282Ssam return ic->ic_raw_xmit(ni, m, params); 545116742Ssam} 546116742Ssam 547119150Ssam/* 548184283Ssam * Send a null data frame to the specified node. If the station 549184283Ssam * is setup for QoS then a QoS Null Data frame is constructed. 550184283Ssam * If this is a WDS station then a 4-address frame is constructed. 551148582Ssam * 552148582Ssam * NB: the caller is assumed to have setup a node reference 553148582Ssam * for use; this is necessary to deal with a race condition 554178354Ssam * when probing for inactive stations. Like ieee80211_mgmt_output 555178354Ssam * we must cleanup any node reference on error; however we 556178354Ssam * can safely just unref it as we know it will never be the 557178354Ssam * last reference to the node. 558119150Ssam */ 559138568Ssamint 560148301Ssamieee80211_send_nulldata(struct ieee80211_node *ni) 561138568Ssam{ 562178354Ssam struct ieee80211vap *vap = ni->ni_vap; 563148301Ssam struct ieee80211com *ic = ni->ni_ic; 564138568Ssam struct mbuf *m; 565138568Ssam struct ieee80211_frame *wh; 566184283Ssam int hdrlen; 567184283Ssam uint8_t *frm; 568138568Ssam 569178354Ssam if (vap->iv_state == IEEE80211_S_CAC) { 570178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH, 571178354Ssam ni, "block %s frame in CAC state", "null data"); 572178354Ssam ieee80211_unref_node(&ni); 573178354Ssam vap->iv_stats.is_tx_badstate++; 574178354Ssam return EIO; /* XXX */ 575178354Ssam } 576178354Ssam 577184283Ssam if (ni->ni_flags & (IEEE80211_NODE_QOS|IEEE80211_NODE_HT)) 578184283Ssam hdrlen = sizeof(struct ieee80211_qosframe); 579184283Ssam else 580184283Ssam hdrlen = sizeof(struct ieee80211_frame); 581184283Ssam /* NB: only WDS vap's get 4-address frames */ 582184283Ssam if (vap->iv_opmode == IEEE80211_M_WDS) 583184283Ssam hdrlen += IEEE80211_ADDR_LEN; 584184283Ssam if (ic->ic_flags & IEEE80211_F_DATAPAD) 585184283Ssam hdrlen = roundup(hdrlen, sizeof(uint32_t)); 586184283Ssam 587184283Ssam m = ieee80211_getmgtframe(&frm, ic->ic_headroom + hdrlen, 0); 588138568Ssam if (m == NULL) { 589138568Ssam /* XXX debug msg */ 590170530Ssam ieee80211_unref_node(&ni); 591178354Ssam vap->iv_stats.is_tx_nobuf++; 592138568Ssam return ENOMEM; 593138568Ssam } 594184283Ssam KASSERT(M_LEADINGSPACE(m) >= hdrlen, 595184283Ssam ("leading space %zd", M_LEADINGSPACE(m))); 596184283Ssam M_PREPEND(m, hdrlen, M_DONTWAIT); 597184283Ssam if (m == NULL) { 598184283Ssam /* NB: cannot happen */ 599184283Ssam ieee80211_free_node(ni); 600184283Ssam return ENOMEM; 601184283Ssam } 602138568Ssam 603184283Ssam wh = mtod(m, struct ieee80211_frame *); /* NB: a little lie */ 604184283Ssam if (ni->ni_flags & IEEE80211_NODE_QOS) { 605184283Ssam const int tid = WME_AC_TO_TID(WME_AC_BE); 606184283Ssam uint8_t *qos; 607184283Ssam 608184283Ssam ieee80211_send_setup(ni, wh, 609184283Ssam IEEE80211_FC0_TYPE_DATA | IEEE80211_FC0_SUBTYPE_QOS_NULL, 610184283Ssam tid, vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid); 611184283Ssam 612184283Ssam if (vap->iv_opmode == IEEE80211_M_WDS) 613184283Ssam qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos; 614184283Ssam else 615184283Ssam qos = ((struct ieee80211_qosframe *) wh)->i_qos; 616184283Ssam qos[0] = tid & IEEE80211_QOS_TID; 617184283Ssam if (ic->ic_wme.wme_wmeChanParams.cap_wmeParams[WME_AC_BE].wmep_noackPolicy) 618184283Ssam qos[0] |= IEEE80211_QOS_ACKPOLICY_NOACK; 619184283Ssam qos[1] = 0; 620184283Ssam } else { 621184283Ssam ieee80211_send_setup(ni, wh, 622184283Ssam IEEE80211_FC0_TYPE_DATA | IEEE80211_FC0_SUBTYPE_NODATA, 623184283Ssam IEEE80211_NONQOS_TID, 624184283Ssam vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid); 625184283Ssam } 626178354Ssam if (vap->iv_opmode != IEEE80211_M_WDS) { 627178354Ssam /* NB: power management bit is never sent by an AP */ 628178354Ssam if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) && 629178354Ssam vap->iv_opmode != IEEE80211_M_HOSTAP) 630178354Ssam wh->i_fc[1] |= IEEE80211_FC1_PWR_MGT; 631178354Ssam } 632184283Ssam m->m_len = m->m_pkthdr.len = hdrlen; 633184286Ssam m->m_flags |= M_ENCAP; /* mark encapsulated */ 634184283Ssam 635172231Ssam M_WME_SETAC(m, WME_AC_BE); 636138568Ssam 637138568Ssam IEEE80211_NODE_STAT(ni, tx_data); 638138568Ssam 639178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS, ni, 640184283Ssam "send %snull data frame on channel %u, pwr mgt %s", 641184283Ssam ni->ni_flags & IEEE80211_NODE_QOS ? "QoS " : "", 642148936Ssam ieee80211_chan2ieee(ic, ic->ic_curchan), 643148314Ssam wh->i_fc[1] & IEEE80211_FC1_PWR_MGT ? "ena" : "dis"); 644148314Ssam 645178354Ssam return ic->ic_raw_xmit(ni, m, NULL); 646138568Ssam} 647138568Ssam 648138568Ssam/* 649138568Ssam * Assign priority to a frame based on any vlan tag assigned 650138568Ssam * to the station and/or any Diffserv setting in an IP header. 651138568Ssam * Finally, if an ACM policy is setup (in station mode) it's 652138568Ssam * applied. 653138568Ssam */ 654138568Ssamint 655178354Ssamieee80211_classify(struct ieee80211_node *ni, struct mbuf *m) 656138568Ssam{ 657178354Ssam const struct ether_header *eh = mtod(m, struct ether_header *); 658138568Ssam int v_wme_ac, d_wme_ac, ac; 659138568Ssam 660178354Ssam /* 661178354Ssam * Always promote PAE/EAPOL frames to high priority. 662178354Ssam */ 663178354Ssam if (eh->ether_type == htons(ETHERTYPE_PAE)) { 664178354Ssam /* NB: mark so others don't need to check header */ 665178354Ssam m->m_flags |= M_EAPOL; 666178354Ssam ac = WME_AC_VO; 667178354Ssam goto done; 668178354Ssam } 669178354Ssam /* 670178354Ssam * Non-qos traffic goes to BE. 671178354Ssam */ 672138568Ssam if ((ni->ni_flags & IEEE80211_NODE_QOS) == 0) { 673138568Ssam ac = WME_AC_BE; 674138568Ssam goto done; 675138568Ssam } 676138568Ssam 677138568Ssam /* 678138568Ssam * If node has a vlan tag then all traffic 679138568Ssam * to it must have a matching tag. 680138568Ssam */ 681138568Ssam v_wme_ac = 0; 682138568Ssam if (ni->ni_vlan != 0) { 683162375Sandre if ((m->m_flags & M_VLANTAG) == 0) { 684138568Ssam IEEE80211_NODE_STAT(ni, tx_novlantag); 685138568Ssam return 1; 686138568Ssam } 687162375Sandre if (EVL_VLANOFTAG(m->m_pkthdr.ether_vtag) != 688138568Ssam EVL_VLANOFTAG(ni->ni_vlan)) { 689138568Ssam IEEE80211_NODE_STAT(ni, tx_vlanmismatch); 690138568Ssam return 1; 691138568Ssam } 692138568Ssam /* map vlan priority to AC */ 693173867Ssam v_wme_ac = TID_TO_WME_AC(EVL_PRIOFTAG(ni->ni_vlan)); 694138568Ssam } 695138568Ssam 696138568Ssam#ifdef INET 697138568Ssam if (eh->ether_type == htons(ETHERTYPE_IP)) { 698173867Ssam uint8_t tos; 699138568Ssam /* 700173867Ssam * IP frame, map the DSCP bits from the TOS field. 701138568Ssam */ 702173867Ssam /* XXX m_copydata may be too slow for fast path */ 703173867Ssam /* NB: ip header may not be in first mbuf */ 704173867Ssam m_copydata(m, sizeof(struct ether_header) + 705173867Ssam offsetof(struct ip, ip_tos), sizeof(tos), &tos); 706173867Ssam tos >>= 5; /* NB: ECN + low 3 bits of DSCP */ 707173867Ssam d_wme_ac = TID_TO_WME_AC(tos); 708138568Ssam } else { 709138568Ssam#endif /* INET */ 710138568Ssam d_wme_ac = WME_AC_BE; 711138568Ssam#ifdef INET 712138568Ssam } 713138568Ssam#endif 714138568Ssam /* 715138568Ssam * Use highest priority AC. 716138568Ssam */ 717138568Ssam if (v_wme_ac > d_wme_ac) 718138568Ssam ac = v_wme_ac; 719138568Ssam else 720138568Ssam ac = d_wme_ac; 721138568Ssam 722138568Ssam /* 723138568Ssam * Apply ACM policy. 724138568Ssam */ 725178354Ssam if (ni->ni_vap->iv_opmode == IEEE80211_M_STA) { 726138568Ssam static const int acmap[4] = { 727138568Ssam WME_AC_BK, /* WME_AC_BE */ 728138568Ssam WME_AC_BK, /* WME_AC_BK */ 729138568Ssam WME_AC_BE, /* WME_AC_VI */ 730138568Ssam WME_AC_VI, /* WME_AC_VO */ 731138568Ssam }; 732178354Ssam struct ieee80211com *ic = ni->ni_ic; 733178354Ssam 734138568Ssam while (ac != WME_AC_BK && 735138568Ssam ic->ic_wme.wme_wmeBssChanParams.cap_wmeParams[ac].wmep_acm) 736138568Ssam ac = acmap[ac]; 737138568Ssam } 738138568Ssamdone: 739138568Ssam M_WME_SETAC(m, ac); 740138568Ssam return 0; 741138568Ssam} 742138568Ssam 743138568Ssam/* 744139527Ssam * Insure there is sufficient contiguous space to encapsulate the 745139527Ssam * 802.11 data frame. If room isn't already there, arrange for it. 746139527Ssam * Drivers and cipher modules assume we have done the necessary work 747139527Ssam * and fail rudely if they don't find the space they need. 748139527Ssam */ 749190391Ssamstruct mbuf * 750178354Ssamieee80211_mbuf_adjust(struct ieee80211vap *vap, int hdrsize, 751139527Ssam struct ieee80211_key *key, struct mbuf *m) 752139527Ssam{ 753164805Ssam#define TO_BE_RECLAIMED (sizeof(struct ether_header) - sizeof(struct llc)) 754178354Ssam int needed_space = vap->iv_ic->ic_headroom + hdrsize; 755139527Ssam 756139527Ssam if (key != NULL) { 757139527Ssam /* XXX belongs in crypto code? */ 758139527Ssam needed_space += key->wk_cipher->ic_header; 759139527Ssam /* XXX frags */ 760156758Ssam /* 761156758Ssam * When crypto is being done in the host we must insure 762156758Ssam * the data are writable for the cipher routines; clone 763156758Ssam * a writable mbuf chain. 764156758Ssam * XXX handle SWMIC specially 765156758Ssam */ 766179394Ssam if (key->wk_flags & (IEEE80211_KEY_SWENCRYPT|IEEE80211_KEY_SWENMIC)) { 767156758Ssam m = m_unshare(m, M_NOWAIT); 768156758Ssam if (m == NULL) { 769178354Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 770156758Ssam "%s: cannot get writable mbuf\n", __func__); 771178354Ssam vap->iv_stats.is_tx_nobuf++; /* XXX new stat */ 772156758Ssam return NULL; 773156758Ssam } 774156758Ssam } 775139527Ssam } 776139527Ssam /* 777139527Ssam * We know we are called just before stripping an Ethernet 778139527Ssam * header and prepending an LLC header. This means we know 779139527Ssam * there will be 780164805Ssam * sizeof(struct ether_header) - sizeof(struct llc) 781139527Ssam * bytes recovered to which we need additional space for the 782139527Ssam * 802.11 header and any crypto header. 783139527Ssam */ 784139527Ssam /* XXX check trailing space and copy instead? */ 785139527Ssam if (M_LEADINGSPACE(m) < needed_space - TO_BE_RECLAIMED) { 786139527Ssam struct mbuf *n = m_gethdr(M_NOWAIT, m->m_type); 787139527Ssam if (n == NULL) { 788178354Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 789139527Ssam "%s: cannot expand storage\n", __func__); 790178354Ssam vap->iv_stats.is_tx_nobuf++; 791139527Ssam m_freem(m); 792139527Ssam return NULL; 793139527Ssam } 794139527Ssam KASSERT(needed_space <= MHLEN, 795139527Ssam ("not enough room, need %u got %zu\n", needed_space, MHLEN)); 796139527Ssam /* 797139527Ssam * Setup new mbuf to have leading space to prepend the 798139527Ssam * 802.11 header and any crypto header bits that are 799139527Ssam * required (the latter are added when the driver calls 800139527Ssam * back to ieee80211_crypto_encap to do crypto encapsulation). 801139527Ssam */ 802139527Ssam /* NB: must be first 'cuz it clobbers m_data */ 803139527Ssam m_move_pkthdr(n, m); 804139527Ssam n->m_len = 0; /* NB: m_gethdr does not set */ 805139527Ssam n->m_data += needed_space; 806139527Ssam /* 807139527Ssam * Pull up Ethernet header to create the expected layout. 808139527Ssam * We could use m_pullup but that's overkill (i.e. we don't 809139527Ssam * need the actual data) and it cannot fail so do it inline 810139527Ssam * for speed. 811139527Ssam */ 812139527Ssam /* NB: struct ether_header is known to be contiguous */ 813139527Ssam n->m_len += sizeof(struct ether_header); 814139527Ssam m->m_len -= sizeof(struct ether_header); 815139527Ssam m->m_data += sizeof(struct ether_header); 816139527Ssam /* 817139527Ssam * Replace the head of the chain. 818139527Ssam */ 819139527Ssam n->m_next = m; 820139527Ssam m = n; 821139527Ssam } 822139527Ssam return m; 823139527Ssam#undef TO_BE_RECLAIMED 824139527Ssam} 825139527Ssam 826139527Ssam/* 827139527Ssam * Return the transmit key to use in sending a unicast frame. 828139527Ssam * If a unicast key is set we use that. When no unicast key is set 829139527Ssam * we fall back to the default transmit key. 830138568Ssam */ 831138568Ssamstatic __inline struct ieee80211_key * 832178354Ssamieee80211_crypto_getucastkey(struct ieee80211vap *vap, 833178354Ssam struct ieee80211_node *ni) 834138568Ssam{ 835167432Ssam if (IEEE80211_KEY_UNDEFINED(&ni->ni_ucastkey)) { 836178354Ssam if (vap->iv_def_txkey == IEEE80211_KEYIX_NONE || 837178354Ssam IEEE80211_KEY_UNDEFINED(&vap->iv_nw_keys[vap->iv_def_txkey])) 838138568Ssam return NULL; 839178354Ssam return &vap->iv_nw_keys[vap->iv_def_txkey]; 840138568Ssam } else { 841138568Ssam return &ni->ni_ucastkey; 842138568Ssam } 843138568Ssam} 844138568Ssam 845138568Ssam/* 846139527Ssam * Return the transmit key to use in sending a multicast frame. 847139527Ssam * Multicast traffic always uses the group key which is installed as 848139527Ssam * the default tx key. 849139527Ssam */ 850139527Ssamstatic __inline struct ieee80211_key * 851178354Ssamieee80211_crypto_getmcastkey(struct ieee80211vap *vap, 852178354Ssam struct ieee80211_node *ni) 853139527Ssam{ 854178354Ssam if (vap->iv_def_txkey == IEEE80211_KEYIX_NONE || 855178354Ssam IEEE80211_KEY_UNDEFINED(&vap->iv_nw_keys[vap->iv_def_txkey])) 856139527Ssam return NULL; 857178354Ssam return &vap->iv_nw_keys[vap->iv_def_txkey]; 858139527Ssam} 859139527Ssam 860139527Ssam/* 861138568Ssam * Encapsulate an outbound data frame. The mbuf chain is updated. 862138568Ssam * If an error is encountered NULL is returned. The caller is required 863138568Ssam * to provide a node reference and pullup the ethernet header in the 864138568Ssam * first mbuf. 865178354Ssam * 866178354Ssam * NB: Packet is assumed to be processed by ieee80211_classify which 867178354Ssam * marked EAPOL frames w/ M_EAPOL. 868138568Ssam */ 869116742Ssamstruct mbuf * 870190579Ssamieee80211_encap(struct ieee80211vap *vap, struct ieee80211_node *ni, 871190579Ssam struct mbuf *m) 872116742Ssam{ 873178354Ssam#define WH4(wh) ((struct ieee80211_frame_addr4 *)(wh)) 874178354Ssam struct ieee80211com *ic = ni->ni_ic; 875116742Ssam struct ether_header eh; 876116742Ssam struct ieee80211_frame *wh; 877138568Ssam struct ieee80211_key *key; 878116742Ssam struct llc *llc; 879190391Ssam int hdrsize, hdrspace, datalen, addqos, txfrag, is4addr; 880116742Ssam 881170530Ssam /* 882170530Ssam * Copy existing Ethernet header to a safe place. The 883170530Ssam * rest of the code assumes it's ok to strip it when 884170530Ssam * reorganizing state for the final encapsulation. 885170530Ssam */ 886138568Ssam KASSERT(m->m_len >= sizeof(eh), ("no ethernet header!")); 887178354Ssam ETHER_HEADER_COPY(&eh, mtod(m, caddr_t)); 888116742Ssam 889138568Ssam /* 890138568Ssam * Insure space for additional headers. First identify 891138568Ssam * transmit key to use in calculating any buffer adjustments 892138568Ssam * required. This is also used below to do privacy 893138568Ssam * encapsulation work. Then calculate the 802.11 header 894138568Ssam * size and any padding required by the driver. 895138568Ssam * 896138568Ssam * Note key may be NULL if we fall back to the default 897138568Ssam * transmit key and that is not set. In that case the 898138568Ssam * buffer may not be expanded as needed by the cipher 899138568Ssam * routines, but they will/should discard it. 900138568Ssam */ 901178354Ssam if (vap->iv_flags & IEEE80211_F_PRIVACY) { 902178354Ssam if (vap->iv_opmode == IEEE80211_M_STA || 903178354Ssam !IEEE80211_IS_MULTICAST(eh.ether_dhost) || 904178354Ssam (vap->iv_opmode == IEEE80211_M_WDS && 905178354Ssam (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY))) 906178354Ssam key = ieee80211_crypto_getucastkey(vap, ni); 907139527Ssam else 908178354Ssam key = ieee80211_crypto_getmcastkey(vap, ni); 909178354Ssam if (key == NULL && (m->m_flags & M_EAPOL) == 0) { 910178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, 911178354Ssam eh.ether_dhost, 912178354Ssam "no default transmit key (%s) deftxkey %u", 913178354Ssam __func__, vap->iv_def_txkey); 914178354Ssam vap->iv_stats.is_tx_nodefkey++; 915171950Ssam goto bad; 916138568Ssam } 917138568Ssam } else 918138568Ssam key = NULL; 919139527Ssam /* 920139527Ssam * XXX Some ap's don't handle QoS-encapsulated EAPOL 921139527Ssam * frames so suppress use. This may be an issue if other 922139527Ssam * ap's require all data frames to be QoS-encapsulated 923139527Ssam * once negotiated in which case we'll need to make this 924139527Ssam * configurable. 925139527Ssam */ 926170530Ssam addqos = (ni->ni_flags & (IEEE80211_NODE_QOS|IEEE80211_NODE_HT)) && 927178354Ssam (m->m_flags & M_EAPOL) == 0; 928139527Ssam if (addqos) 929138568Ssam hdrsize = sizeof(struct ieee80211_qosframe); 930138568Ssam else 931138568Ssam hdrsize = sizeof(struct ieee80211_frame); 932178354Ssam /* 933178354Ssam * 4-address frames need to be generated for: 934190672Ssam * o packets sent through a WDS vap (IEEE80211_M_WDS) 935178354Ssam * o packets relayed by a station operating with dynamic WDS 936178354Ssam * (IEEE80211_M_STA+IEEE80211_F_DWDS and src address) 937178354Ssam */ 938190672Ssam is4addr = vap->iv_opmode == IEEE80211_M_WDS || 939178354Ssam (vap->iv_opmode == IEEE80211_M_STA && 940178354Ssam (vap->iv_flags & IEEE80211_F_DWDS) && 941178354Ssam !IEEE80211_ADDR_EQ(eh.ether_shost, vap->iv_myaddr)); 942178354Ssam if (is4addr) 943178354Ssam hdrsize += IEEE80211_ADDR_LEN; 944178354Ssam /* 945178354Ssam * Honor driver DATAPAD requirement. 946178354Ssam */ 947138568Ssam if (ic->ic_flags & IEEE80211_F_DATAPAD) 948178354Ssam hdrspace = roundup(hdrsize, sizeof(uint32_t)); 949178354Ssam else 950178354Ssam hdrspace = hdrsize; 951170530Ssam 952190391Ssam if (__predict_true((m->m_flags & M_FF) == 0)) { 953170530Ssam /* 954170530Ssam * Normal frame. 955170530Ssam */ 956178354Ssam m = ieee80211_mbuf_adjust(vap, hdrspace, key, m); 957170530Ssam if (m == NULL) { 958170530Ssam /* NB: ieee80211_mbuf_adjust handles msgs+statistics */ 959170530Ssam goto bad; 960170530Ssam } 961170530Ssam /* NB: this could be optimized 'cuz of ieee80211_mbuf_adjust */ 962170530Ssam m_adj(m, sizeof(struct ether_header) - sizeof(struct llc)); 963170530Ssam llc = mtod(m, struct llc *); 964170530Ssam llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP; 965170530Ssam llc->llc_control = LLC_UI; 966170530Ssam llc->llc_snap.org_code[0] = 0; 967170530Ssam llc->llc_snap.org_code[1] = 0; 968170530Ssam llc->llc_snap.org_code[2] = 0; 969170530Ssam llc->llc_snap.ether_type = eh.ether_type; 970190391Ssam } else { 971190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 972190579Ssam /* 973190579Ssam * Aggregated frame. 974190579Ssam */ 975190391Ssam m = ieee80211_ff_encap(vap, m, hdrspace, key); 976190391Ssam if (m == NULL) 977190391Ssam#endif 978190391Ssam goto bad; 979127772Ssam } 980138568Ssam datalen = m->m_pkthdr.len; /* NB: w/o 802.11 header */ 981138568Ssam 982178354Ssam M_PREPEND(m, hdrspace, M_DONTWAIT); 983121180Ssam if (m == NULL) { 984178354Ssam vap->iv_stats.is_tx_nobuf++; 985119150Ssam goto bad; 986121180Ssam } 987116742Ssam wh = mtod(m, struct ieee80211_frame *); 988116742Ssam wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_DATA; 989170530Ssam *(uint16_t *)wh->i_dur = 0; 990178354Ssam if (is4addr) { 991178354Ssam wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS; 992178354Ssam IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_macaddr); 993178354Ssam IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); 994178354Ssam IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_dhost); 995178354Ssam IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, eh.ether_shost); 996178354Ssam } else switch (vap->iv_opmode) { 997116742Ssam case IEEE80211_M_STA: 998116742Ssam wh->i_fc[1] = IEEE80211_FC1_DIR_TODS; 999116742Ssam IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_bssid); 1000116742Ssam IEEE80211_ADDR_COPY(wh->i_addr2, eh.ether_shost); 1001116742Ssam IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_dhost); 1002116742Ssam break; 1003116742Ssam case IEEE80211_M_IBSS: 1004116742Ssam case IEEE80211_M_AHDEMO: 1005116742Ssam wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 1006116742Ssam IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost); 1007116742Ssam IEEE80211_ADDR_COPY(wh->i_addr2, eh.ether_shost); 1008140636Ssam /* 1009178354Ssam * NB: always use the bssid from iv_bss as the 1010140636Ssam * neighbor's may be stale after an ibss merge 1011140636Ssam */ 1012178354Ssam IEEE80211_ADDR_COPY(wh->i_addr3, vap->iv_bss->ni_bssid); 1013116742Ssam break; 1014116742Ssam case IEEE80211_M_HOSTAP: 1015116742Ssam wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS; 1016116742Ssam IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost); 1017116742Ssam IEEE80211_ADDR_COPY(wh->i_addr2, ni->ni_bssid); 1018116742Ssam IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_shost); 1019116742Ssam break; 1020117817Ssam case IEEE80211_M_MONITOR: 1021178354Ssam case IEEE80211_M_WDS: /* NB: is4addr should always be true */ 1022119150Ssam goto bad; 1023116742Ssam } 1024190678Ssam if (m->m_flags & M_MORE_DATA) 1025147789Ssam wh->i_fc[1] |= IEEE80211_FC1_MORE_DATA; 1026139527Ssam if (addqos) { 1027178354Ssam uint8_t *qos; 1028138568Ssam int ac, tid; 1029138568Ssam 1030178354Ssam if (is4addr) { 1031178354Ssam qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos; 1032178354Ssam } else 1033178354Ssam qos = ((struct ieee80211_qosframe *) wh)->i_qos; 1034138568Ssam ac = M_WME_GETAC(m); 1035138568Ssam /* map from access class/queue to 11e header priorty value */ 1036138568Ssam tid = WME_AC_TO_TID(ac); 1037178354Ssam qos[0] = tid & IEEE80211_QOS_TID; 1038170530Ssam /* 1039170530Ssam * Check if A-MPDU tx aggregation is setup or if we 1040170530Ssam * should try to enable it. The sta must be associated 1041178354Ssam * with HT and A-MPDU enabled for use. When the policy 1042178354Ssam * routine decides we should enable A-MPDU we issue an 1043178354Ssam * ADDBA request and wait for a reply. The frame being 1044178354Ssam * encapsulated will go out w/o using A-MPDU, or possibly 1045178354Ssam * it might be collected by the driver and held/retransmit. 1046178354Ssam * The default ic_ampdu_enable routine handles staggering 1047178354Ssam * ADDBA requests in case the receiver NAK's us or we are 1048178354Ssam * otherwise unable to establish a BA stream. 1049170530Ssam */ 1050173273Ssam if ((ni->ni_flags & IEEE80211_NODE_AMPDU_TX) && 1051178354Ssam (vap->iv_flags_ext & IEEE80211_FEXT_AMPDU_TX)) { 1052170530Ssam struct ieee80211_tx_ampdu *tap = &ni->ni_tx_ampdu[ac]; 1053170530Ssam 1054178354Ssam ieee80211_txampdu_count_packet(tap); 1055170530Ssam if (IEEE80211_AMPDU_RUNNING(tap)) { 1056170530Ssam /* 1057170530Ssam * Operational, mark frame for aggregation. 1058183247Ssam * 1059183247Ssam * NB: We support only immediate BA's for 1060183247Ssam * AMPDU which means we set the QoS control 1061183247Ssam * field to "normal ack" (0) to get "implicit 1062183247Ssam * block ack" behaviour. 1063170530Ssam */ 1064183247Ssam m->m_flags |= M_AMPDU_MPDU; 1065178354Ssam } else if (!IEEE80211_AMPDU_REQUESTED(tap) && 1066178354Ssam ic->ic_ampdu_enable(ni, tap)) { 1067170530Ssam /* 1068170530Ssam * Not negotiated yet, request service. 1069170530Ssam */ 1070170530Ssam ieee80211_ampdu_request(ni, tap); 1071170530Ssam } 1072170530Ssam } 1073170530Ssam /* XXX works even when BA marked above */ 1074138568Ssam if (ic->ic_wme.wme_wmeChanParams.cap_wmeParams[ac].wmep_noackPolicy) 1075178354Ssam qos[0] |= IEEE80211_QOS_ACKPOLICY_NOACK; 1076178354Ssam qos[1] = 0; 1077178354Ssam wh->i_fc[0] |= IEEE80211_FC0_SUBTYPE_QOS; 1078138568Ssam 1079183247Ssam if ((m->m_flags & M_AMPDU_MPDU) == 0) { 1080183247Ssam /* 1081183247Ssam * NB: don't assign a sequence # to potential 1082183247Ssam * aggregates; we expect this happens at the 1083183247Ssam * point the frame comes off any aggregation q 1084183247Ssam * as otherwise we may introduce holes in the 1085183247Ssam * BA sequence space and/or make window accouting 1086183247Ssam * more difficult. 1087183247Ssam * 1088183247Ssam * XXX may want to control this with a driver 1089183247Ssam * capability; this may also change when we pull 1090183247Ssam * aggregation up into net80211 1091183247Ssam */ 1092183247Ssam *(uint16_t *)wh->i_seq = 1093183247Ssam htole16(ni->ni_txseqs[tid] << IEEE80211_SEQ_SEQ_SHIFT); 1094183247Ssam ni->ni_txseqs[tid]++; 1095183247Ssam } 1096138568Ssam } else { 1097170530Ssam *(uint16_t *)wh->i_seq = 1098167439Ssam htole16(ni->ni_txseqs[IEEE80211_NONQOS_TID] << IEEE80211_SEQ_SEQ_SHIFT); 1099167439Ssam ni->ni_txseqs[IEEE80211_NONQOS_TID]++; 1100138568Ssam } 1101170530Ssam /* check if xmit fragmentation is required */ 1102178354Ssam txfrag = (m->m_pkthdr.len > vap->iv_fragthreshold && 1103170530Ssam !IEEE80211_IS_MULTICAST(wh->i_addr1) && 1104178354Ssam (vap->iv_caps & IEEE80211_C_TXFRAG) && 1105190391Ssam (m->m_flags & M_FF) == 0); /* NB: don't fragment ff's */ 1106139527Ssam if (key != NULL) { 1107139527Ssam /* 1108139527Ssam * IEEE 802.1X: send EAPOL frames always in the clear. 1109139527Ssam * WPA/WPA2: encrypt EAPOL keys when pairwise keys are set. 1110139527Ssam */ 1111178354Ssam if ((m->m_flags & M_EAPOL) == 0 || 1112178354Ssam ((vap->iv_flags & IEEE80211_F_WPA) && 1113178354Ssam (vap->iv_opmode == IEEE80211_M_STA ? 1114167432Ssam !IEEE80211_KEY_UNDEFINED(key) : 1115167432Ssam !IEEE80211_KEY_UNDEFINED(&ni->ni_ucastkey)))) { 1116139527Ssam wh->i_fc[1] |= IEEE80211_FC1_WEP; 1117178354Ssam if (!ieee80211_crypto_enmic(vap, key, m, txfrag)) { 1118178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, 1119178354Ssam eh.ether_dhost, 1120178354Ssam "%s", "enmic failed, discard frame"); 1121178354Ssam vap->iv_stats.is_crypto_enmicfail++; 1122139527Ssam goto bad; 1123139527Ssam } 1124139527Ssam } 1125139527Ssam } 1126178354Ssam if (txfrag && !ieee80211_fragment(vap, m, hdrsize, 1127178354Ssam key != NULL ? key->wk_cipher->ic_header : 0, vap->iv_fragthreshold)) 1128170530Ssam goto bad; 1129138568Ssam 1130184286Ssam m->m_flags |= M_ENCAP; /* mark encapsulated */ 1131184286Ssam 1132138568Ssam IEEE80211_NODE_STAT(ni, tx_data); 1133161144Ssam if (IEEE80211_IS_MULTICAST(wh->i_addr1)) 1134161144Ssam IEEE80211_NODE_STAT(ni, tx_mcast); 1135161144Ssam else 1136161144Ssam IEEE80211_NODE_STAT(ni, tx_ucast); 1137138568Ssam IEEE80211_NODE_STAT_ADD(ni, tx_bytes, datalen); 1138138568Ssam 1139178354Ssam /* XXX fragmented frames not handled */ 1140178354Ssam if (bpf_peers_present(vap->iv_rawbpf)) 1141178354Ssam bpf_mtap(vap->iv_rawbpf, m); 1142178354Ssam 1143116742Ssam return m; 1144119150Ssambad: 1145119150Ssam if (m != NULL) 1146119150Ssam m_freem(m); 1147119150Ssam return NULL; 1148178354Ssam#undef WH4 1149116742Ssam} 1150116742Ssam 1151116742Ssam/* 1152170530Ssam * Fragment the frame according to the specified mtu. 1153170530Ssam * The size of the 802.11 header (w/o padding) is provided 1154170530Ssam * so we don't need to recalculate it. We create a new 1155170530Ssam * mbuf for each fragment and chain it through m_nextpkt; 1156170530Ssam * we might be able to optimize this by reusing the original 1157170530Ssam * packet's mbufs but that is significantly more complicated. 1158170530Ssam */ 1159170530Ssamstatic int 1160178354Ssamieee80211_fragment(struct ieee80211vap *vap, struct mbuf *m0, 1161170530Ssam u_int hdrsize, u_int ciphdrsize, u_int mtu) 1162170530Ssam{ 1163170530Ssam struct ieee80211_frame *wh, *whf; 1164170530Ssam struct mbuf *m, *prev, *next; 1165170530Ssam u_int totalhdrsize, fragno, fragsize, off, remainder, payload; 1166170530Ssam 1167170530Ssam KASSERT(m0->m_nextpkt == NULL, ("mbuf already chained?")); 1168170530Ssam KASSERT(m0->m_pkthdr.len > mtu, 1169170530Ssam ("pktlen %u mtu %u", m0->m_pkthdr.len, mtu)); 1170170530Ssam 1171170530Ssam wh = mtod(m0, struct ieee80211_frame *); 1172170530Ssam /* NB: mark the first frag; it will be propagated below */ 1173170530Ssam wh->i_fc[1] |= IEEE80211_FC1_MORE_FRAG; 1174170530Ssam totalhdrsize = hdrsize + ciphdrsize; 1175170530Ssam fragno = 1; 1176170530Ssam off = mtu - ciphdrsize; 1177170530Ssam remainder = m0->m_pkthdr.len - off; 1178170530Ssam prev = m0; 1179170530Ssam do { 1180170530Ssam fragsize = totalhdrsize + remainder; 1181170530Ssam if (fragsize > mtu) 1182170530Ssam fragsize = mtu; 1183178354Ssam /* XXX fragsize can be >2048! */ 1184170530Ssam KASSERT(fragsize < MCLBYTES, 1185170530Ssam ("fragment size %u too big!", fragsize)); 1186170530Ssam if (fragsize > MHLEN) 1187170530Ssam m = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR); 1188170530Ssam else 1189170530Ssam m = m_gethdr(M_DONTWAIT, MT_DATA); 1190170530Ssam if (m == NULL) 1191170530Ssam goto bad; 1192170530Ssam /* leave room to prepend any cipher header */ 1193170530Ssam m_align(m, fragsize - ciphdrsize); 1194170530Ssam 1195170530Ssam /* 1196170530Ssam * Form the header in the fragment. Note that since 1197170530Ssam * we mark the first fragment with the MORE_FRAG bit 1198170530Ssam * it automatically is propagated to each fragment; we 1199170530Ssam * need only clear it on the last fragment (done below). 1200170530Ssam */ 1201170530Ssam whf = mtod(m, struct ieee80211_frame *); 1202170530Ssam memcpy(whf, wh, hdrsize); 1203170530Ssam *(uint16_t *)&whf->i_seq[0] |= htole16( 1204170530Ssam (fragno & IEEE80211_SEQ_FRAG_MASK) << 1205170530Ssam IEEE80211_SEQ_FRAG_SHIFT); 1206170530Ssam fragno++; 1207170530Ssam 1208170530Ssam payload = fragsize - totalhdrsize; 1209170530Ssam /* NB: destination is known to be contiguous */ 1210170530Ssam m_copydata(m0, off, payload, mtod(m, uint8_t *) + hdrsize); 1211170530Ssam m->m_len = hdrsize + payload; 1212170530Ssam m->m_pkthdr.len = hdrsize + payload; 1213170530Ssam m->m_flags |= M_FRAG; 1214170530Ssam 1215170530Ssam /* chain up the fragment */ 1216170530Ssam prev->m_nextpkt = m; 1217170530Ssam prev = m; 1218170530Ssam 1219170530Ssam /* deduct fragment just formed */ 1220170530Ssam remainder -= payload; 1221170530Ssam off += payload; 1222170530Ssam } while (remainder != 0); 1223188380Sweongyo 1224188380Sweongyo /* set the last fragment */ 1225188380Sweongyo m->m_flags |= M_LASTFRAG; 1226170530Ssam whf->i_fc[1] &= ~IEEE80211_FC1_MORE_FRAG; 1227170530Ssam 1228170530Ssam /* strip first mbuf now that everything has been copied */ 1229170530Ssam m_adj(m0, -(m0->m_pkthdr.len - (mtu - ciphdrsize))); 1230170530Ssam m0->m_flags |= M_FIRSTFRAG | M_FRAG; 1231170530Ssam 1232178354Ssam vap->iv_stats.is_tx_fragframes++; 1233178354Ssam vap->iv_stats.is_tx_frags += fragno-1; 1234170530Ssam 1235170530Ssam return 1; 1236170530Ssambad: 1237170530Ssam /* reclaim fragments but leave original frame for caller to free */ 1238170530Ssam for (m = m0->m_nextpkt; m != NULL; m = next) { 1239170530Ssam next = m->m_nextpkt; 1240170530Ssam m->m_nextpkt = NULL; /* XXX paranoid */ 1241170530Ssam m_freem(m); 1242170530Ssam } 1243170530Ssam m0->m_nextpkt = NULL; 1244170530Ssam return 0; 1245170530Ssam} 1246170530Ssam 1247170530Ssam/* 1248116742Ssam * Add a supported rates element id to a frame. 1249116742Ssam */ 1250170530Ssamstatic uint8_t * 1251170530Ssamieee80211_add_rates(uint8_t *frm, const struct ieee80211_rateset *rs) 1252116742Ssam{ 1253116742Ssam int nrates; 1254116742Ssam 1255116742Ssam *frm++ = IEEE80211_ELEMID_RATES; 1256116742Ssam nrates = rs->rs_nrates; 1257116742Ssam if (nrates > IEEE80211_RATE_SIZE) 1258116742Ssam nrates = IEEE80211_RATE_SIZE; 1259116742Ssam *frm++ = nrates; 1260116742Ssam memcpy(frm, rs->rs_rates, nrates); 1261116742Ssam return frm + nrates; 1262116742Ssam} 1263116742Ssam 1264116742Ssam/* 1265116742Ssam * Add an extended supported rates element id to a frame. 1266116742Ssam */ 1267170530Ssamstatic uint8_t * 1268170530Ssamieee80211_add_xrates(uint8_t *frm, const struct ieee80211_rateset *rs) 1269116742Ssam{ 1270116742Ssam /* 1271116742Ssam * Add an extended supported rates element if operating in 11g mode. 1272116742Ssam */ 1273116742Ssam if (rs->rs_nrates > IEEE80211_RATE_SIZE) { 1274116742Ssam int nrates = rs->rs_nrates - IEEE80211_RATE_SIZE; 1275116742Ssam *frm++ = IEEE80211_ELEMID_XRATES; 1276116742Ssam *frm++ = nrates; 1277116742Ssam memcpy(frm, rs->rs_rates + IEEE80211_RATE_SIZE, nrates); 1278116742Ssam frm += nrates; 1279116742Ssam } 1280116742Ssam return frm; 1281116742Ssam} 1282116742Ssam 1283116742Ssam/* 1284178354Ssam * Add an ssid element to a frame. 1285116742Ssam */ 1286170530Ssamstatic uint8_t * 1287170530Ssamieee80211_add_ssid(uint8_t *frm, const uint8_t *ssid, u_int len) 1288116742Ssam{ 1289116742Ssam *frm++ = IEEE80211_ELEMID_SSID; 1290116742Ssam *frm++ = len; 1291116742Ssam memcpy(frm, ssid, len); 1292116742Ssam return frm + len; 1293116742Ssam} 1294116742Ssam 1295138568Ssam/* 1296138568Ssam * Add an erp element to a frame. 1297138568Ssam */ 1298170530Ssamstatic uint8_t * 1299170530Ssamieee80211_add_erp(uint8_t *frm, struct ieee80211com *ic) 1300116742Ssam{ 1301170530Ssam uint8_t erp; 1302116742Ssam 1303138568Ssam *frm++ = IEEE80211_ELEMID_ERP; 1304138568Ssam *frm++ = 1; 1305138568Ssam erp = 0; 1306138568Ssam if (ic->ic_nonerpsta != 0) 1307138568Ssam erp |= IEEE80211_ERP_NON_ERP_PRESENT; 1308138568Ssam if (ic->ic_flags & IEEE80211_F_USEPROT) 1309138568Ssam erp |= IEEE80211_ERP_USE_PROTECTION; 1310138568Ssam if (ic->ic_flags & IEEE80211_F_USEBARKER) 1311138568Ssam erp |= IEEE80211_ERP_LONG_PREAMBLE; 1312138568Ssam *frm++ = erp; 1313138568Ssam return frm; 1314138568Ssam} 1315138568Ssam 1316178354Ssam/* 1317178354Ssam * Add a CFParams element to a frame. 1318178354Ssam */ 1319170530Ssamstatic uint8_t * 1320178354Ssamieee80211_add_cfparms(uint8_t *frm, struct ieee80211com *ic) 1321138568Ssam{ 1322138568Ssam#define ADDSHORT(frm, v) do { \ 1323138568Ssam frm[0] = (v) & 0xff; \ 1324138568Ssam frm[1] = (v) >> 8; \ 1325138568Ssam frm += 2; \ 1326138568Ssam} while (0) 1327178354Ssam *frm++ = IEEE80211_ELEMID_CFPARMS; 1328178354Ssam *frm++ = 6; 1329178354Ssam *frm++ = 0; /* CFP count */ 1330178354Ssam *frm++ = 2; /* CFP period */ 1331178354Ssam ADDSHORT(frm, 0); /* CFP MaxDuration (TU) */ 1332178354Ssam ADDSHORT(frm, 0); /* CFP CurRemaining (TU) */ 1333138568Ssam return frm; 1334138568Ssam#undef ADDSHORT 1335116742Ssam} 1336116742Ssam 1337178354Ssamstatic __inline uint8_t * 1338178354Ssamadd_appie(uint8_t *frm, const struct ieee80211_appie *ie) 1339138568Ssam{ 1340178354Ssam memcpy(frm, ie->ie_data, ie->ie_len); 1341178354Ssam return frm + ie->ie_len; 1342138568Ssam} 1343138568Ssam 1344178354Ssamstatic __inline uint8_t * 1345178354Ssamadd_ie(uint8_t *frm, const uint8_t *ie) 1346138568Ssam{ 1347178354Ssam memcpy(frm, ie, 2 + ie[1]); 1348178354Ssam return frm + 2 + ie[1]; 1349138568Ssam} 1350138568Ssam 1351138568Ssam#define WME_OUI_BYTES 0x00, 0x50, 0xf2 1352138568Ssam/* 1353138568Ssam * Add a WME information element to a frame. 1354138568Ssam */ 1355170530Ssamstatic uint8_t * 1356170530Ssamieee80211_add_wme_info(uint8_t *frm, struct ieee80211_wme_state *wme) 1357138568Ssam{ 1358138568Ssam static const struct ieee80211_wme_info info = { 1359138568Ssam .wme_id = IEEE80211_ELEMID_VENDOR, 1360138568Ssam .wme_len = sizeof(struct ieee80211_wme_info) - 2, 1361138568Ssam .wme_oui = { WME_OUI_BYTES }, 1362138568Ssam .wme_type = WME_OUI_TYPE, 1363138568Ssam .wme_subtype = WME_INFO_OUI_SUBTYPE, 1364138568Ssam .wme_version = WME_VERSION, 1365138568Ssam .wme_info = 0, 1366138568Ssam }; 1367138568Ssam memcpy(frm, &info, sizeof(info)); 1368138568Ssam return frm + sizeof(info); 1369138568Ssam} 1370138568Ssam 1371138568Ssam/* 1372138568Ssam * Add a WME parameters element to a frame. 1373138568Ssam */ 1374170530Ssamstatic uint8_t * 1375170530Ssamieee80211_add_wme_param(uint8_t *frm, struct ieee80211_wme_state *wme) 1376138568Ssam{ 1377138568Ssam#define SM(_v, _f) (((_v) << _f##_S) & _f) 1378138568Ssam#define ADDSHORT(frm, v) do { \ 1379138568Ssam frm[0] = (v) & 0xff; \ 1380138568Ssam frm[1] = (v) >> 8; \ 1381138568Ssam frm += 2; \ 1382138568Ssam} while (0) 1383138568Ssam /* NB: this works 'cuz a param has an info at the front */ 1384138568Ssam static const struct ieee80211_wme_info param = { 1385138568Ssam .wme_id = IEEE80211_ELEMID_VENDOR, 1386138568Ssam .wme_len = sizeof(struct ieee80211_wme_param) - 2, 1387138568Ssam .wme_oui = { WME_OUI_BYTES }, 1388138568Ssam .wme_type = WME_OUI_TYPE, 1389138568Ssam .wme_subtype = WME_PARAM_OUI_SUBTYPE, 1390138568Ssam .wme_version = WME_VERSION, 1391138568Ssam }; 1392138568Ssam int i; 1393138568Ssam 1394138568Ssam memcpy(frm, ¶m, sizeof(param)); 1395138568Ssam frm += __offsetof(struct ieee80211_wme_info, wme_info); 1396138568Ssam *frm++ = wme->wme_bssChanParams.cap_info; /* AC info */ 1397138568Ssam *frm++ = 0; /* reserved field */ 1398138568Ssam for (i = 0; i < WME_NUM_AC; i++) { 1399138568Ssam const struct wmeParams *ac = 1400138568Ssam &wme->wme_bssChanParams.cap_wmeParams[i]; 1401138568Ssam *frm++ = SM(i, WME_PARAM_ACI) 1402138568Ssam | SM(ac->wmep_acm, WME_PARAM_ACM) 1403138568Ssam | SM(ac->wmep_aifsn, WME_PARAM_AIFSN) 1404138568Ssam ; 1405138568Ssam *frm++ = SM(ac->wmep_logcwmax, WME_PARAM_LOGCWMAX) 1406138568Ssam | SM(ac->wmep_logcwmin, WME_PARAM_LOGCWMIN) 1407138568Ssam ; 1408138568Ssam ADDSHORT(frm, ac->wmep_txopLimit); 1409138568Ssam } 1410138568Ssam return frm; 1411138568Ssam#undef SM 1412138568Ssam#undef ADDSHORT 1413138568Ssam} 1414138568Ssam#undef WME_OUI_BYTES 1415138568Ssam 1416138568Ssam/* 1417178354Ssam * Add an 11h Power Constraint element to a frame. 1418178354Ssam */ 1419178354Ssamstatic uint8_t * 1420178354Ssamieee80211_add_powerconstraint(uint8_t *frm, struct ieee80211vap *vap) 1421178354Ssam{ 1422178354Ssam const struct ieee80211_channel *c = vap->iv_bss->ni_chan; 1423178354Ssam /* XXX per-vap tx power limit? */ 1424178354Ssam int8_t limit = vap->iv_ic->ic_txpowlimit / 2; 1425178354Ssam 1426178354Ssam frm[0] = IEEE80211_ELEMID_PWRCNSTR; 1427178354Ssam frm[1] = 1; 1428178354Ssam frm[2] = c->ic_maxregpower > limit ? c->ic_maxregpower - limit : 0; 1429178354Ssam return frm + 3; 1430178354Ssam} 1431178354Ssam 1432178354Ssam/* 1433178354Ssam * Add an 11h Power Capability element to a frame. 1434178354Ssam */ 1435178354Ssamstatic uint8_t * 1436178354Ssamieee80211_add_powercapability(uint8_t *frm, const struct ieee80211_channel *c) 1437178354Ssam{ 1438178354Ssam frm[0] = IEEE80211_ELEMID_PWRCAP; 1439178354Ssam frm[1] = 2; 1440178354Ssam frm[2] = c->ic_minpower; 1441178354Ssam frm[3] = c->ic_maxpower; 1442178354Ssam return frm + 4; 1443178354Ssam} 1444178354Ssam 1445178354Ssam/* 1446178354Ssam * Add an 11h Supported Channels element to a frame. 1447178354Ssam */ 1448178354Ssamstatic uint8_t * 1449178354Ssamieee80211_add_supportedchannels(uint8_t *frm, struct ieee80211com *ic) 1450178354Ssam{ 1451178354Ssam static const int ielen = 26; 1452178354Ssam 1453178354Ssam frm[0] = IEEE80211_ELEMID_SUPPCHAN; 1454178354Ssam frm[1] = ielen; 1455178354Ssam /* XXX not correct */ 1456178354Ssam memcpy(frm+2, ic->ic_chan_avail, ielen); 1457178354Ssam return frm + 2 + ielen; 1458178354Ssam} 1459178354Ssam 1460178354Ssam/* 1461178354Ssam * Add an 11h Channel Switch Announcement element to a frame. 1462178354Ssam * Note that we use the per-vap CSA count to adjust the global 1463178354Ssam * counter so we can use this routine to form probe response 1464178354Ssam * frames and get the current count. 1465178354Ssam */ 1466178354Ssamstatic uint8_t * 1467178354Ssamieee80211_add_csa(uint8_t *frm, struct ieee80211vap *vap) 1468178354Ssam{ 1469178354Ssam struct ieee80211com *ic = vap->iv_ic; 1470178354Ssam struct ieee80211_csa_ie *csa = (struct ieee80211_csa_ie *) frm; 1471178354Ssam 1472178354Ssam csa->csa_ie = IEEE80211_ELEMID_CHANSWITCHANN; 1473178354Ssam csa->csa_len = 3; 1474178354Ssam csa->csa_mode = 1; /* XXX force quiet on channel */ 1475178354Ssam csa->csa_newchan = ieee80211_chan2ieee(ic, ic->ic_csa_newchan); 1476178354Ssam csa->csa_count = ic->ic_csa_count - vap->iv_csa_count; 1477178354Ssam return frm + sizeof(*csa); 1478178354Ssam} 1479178354Ssam 1480178354Ssam/* 1481178354Ssam * Add an 11h country information element to a frame. 1482178354Ssam */ 1483178354Ssamstatic uint8_t * 1484178354Ssamieee80211_add_countryie(uint8_t *frm, struct ieee80211com *ic) 1485178354Ssam{ 1486178354Ssam 1487178354Ssam if (ic->ic_countryie == NULL || 1488178354Ssam ic->ic_countryie_chan != ic->ic_bsschan) { 1489178354Ssam /* 1490178354Ssam * Handle lazy construction of ie. This is done on 1491178354Ssam * first use and after a channel change that requires 1492178354Ssam * re-calculation. 1493178354Ssam */ 1494178354Ssam if (ic->ic_countryie != NULL) 1495178354Ssam free(ic->ic_countryie, M_80211_NODE_IE); 1496178354Ssam ic->ic_countryie = ieee80211_alloc_countryie(ic); 1497178354Ssam if (ic->ic_countryie == NULL) 1498178354Ssam return frm; 1499178354Ssam ic->ic_countryie_chan = ic->ic_bsschan; 1500178354Ssam } 1501178354Ssam return add_appie(frm, ic->ic_countryie); 1502178354Ssam} 1503178354Ssam 1504178354Ssam/* 1505148315Ssam * Send a probe request frame with the specified ssid 1506148315Ssam * and any optional information element data. 1507148315Ssam */ 1508148315Ssamint 1509148315Ssamieee80211_send_probereq(struct ieee80211_node *ni, 1510170530Ssam const uint8_t sa[IEEE80211_ADDR_LEN], 1511170530Ssam const uint8_t da[IEEE80211_ADDR_LEN], 1512170530Ssam const uint8_t bssid[IEEE80211_ADDR_LEN], 1513178354Ssam const uint8_t *ssid, size_t ssidlen) 1514148315Ssam{ 1515178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1516148315Ssam struct ieee80211com *ic = ni->ni_ic; 1517184284Ssam const struct ieee80211_txparam *tp; 1518184284Ssam struct ieee80211_bpf_params params; 1519148315Ssam struct ieee80211_frame *wh; 1520165569Ssam const struct ieee80211_rateset *rs; 1521148315Ssam struct mbuf *m; 1522170530Ssam uint8_t *frm; 1523148315Ssam 1524178354Ssam if (vap->iv_state == IEEE80211_S_CAC) { 1525178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni, 1526178354Ssam "block %s frame in CAC state", "probe request"); 1527178354Ssam vap->iv_stats.is_tx_badstate++; 1528178354Ssam return EIO; /* XXX */ 1529178354Ssam } 1530178354Ssam 1531148315Ssam /* 1532148315Ssam * Hold a reference on the node so it doesn't go away until after 1533148315Ssam * the xmit is complete all the way in the driver. On error we 1534148315Ssam * will remove our reference. 1535148315Ssam */ 1536178354Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1537148315Ssam "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", 1538148315Ssam __func__, __LINE__, 1539148315Ssam ni, ether_sprintf(ni->ni_macaddr), 1540148315Ssam ieee80211_node_refcnt(ni)+1); 1541148315Ssam ieee80211_ref_node(ni); 1542148315Ssam 1543148315Ssam /* 1544148315Ssam * prreq frame format 1545148315Ssam * [tlv] ssid 1546148315Ssam * [tlv] supported rates 1547178354Ssam * [tlv] RSN (optional) 1548148315Ssam * [tlv] extended supported rates 1549178354Ssam * [tlv] WPA (optional) 1550148315Ssam * [tlv] user-specified ie's 1551148315Ssam */ 1552148315Ssam m = ieee80211_getmgtframe(&frm, 1553170530Ssam ic->ic_headroom + sizeof(struct ieee80211_frame), 1554178354Ssam 2 + IEEE80211_NWID_LEN 1555148315Ssam + 2 + IEEE80211_RATE_SIZE 1556178354Ssam + sizeof(struct ieee80211_ie_wpa) 1557148315Ssam + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 1558178354Ssam + sizeof(struct ieee80211_ie_wpa) 1559178354Ssam + (vap->iv_appie_probereq != NULL ? 1560178354Ssam vap->iv_appie_probereq->ie_len : 0) 1561148315Ssam ); 1562148315Ssam if (m == NULL) { 1563178354Ssam vap->iv_stats.is_tx_nobuf++; 1564148315Ssam ieee80211_free_node(ni); 1565148315Ssam return ENOMEM; 1566148315Ssam } 1567148315Ssam 1568148315Ssam frm = ieee80211_add_ssid(frm, ssid, ssidlen); 1569165569Ssam rs = ieee80211_get_suprates(ic, ic->ic_curchan); 1570165569Ssam frm = ieee80211_add_rates(frm, rs); 1571178354Ssam if (vap->iv_flags & IEEE80211_F_WPA2) { 1572178354Ssam if (vap->iv_rsn_ie != NULL) 1573178354Ssam frm = add_ie(frm, vap->iv_rsn_ie); 1574178354Ssam /* XXX else complain? */ 1575178354Ssam } 1576165569Ssam frm = ieee80211_add_xrates(frm, rs); 1577178354Ssam if (vap->iv_flags & IEEE80211_F_WPA1) { 1578178354Ssam if (vap->iv_wpa_ie != NULL) 1579178354Ssam frm = add_ie(frm, vap->iv_wpa_ie); 1580178354Ssam /* XXX else complain? */ 1581148315Ssam } 1582178354Ssam if (vap->iv_appie_probereq != NULL) 1583178354Ssam frm = add_appie(frm, vap->iv_appie_probereq); 1584170530Ssam m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 1585148315Ssam 1586184284Ssam KASSERT(M_LEADINGSPACE(m) >= sizeof(struct ieee80211_frame), 1587184284Ssam ("leading space %zd", M_LEADINGSPACE(m))); 1588148315Ssam M_PREPEND(m, sizeof(struct ieee80211_frame), M_DONTWAIT); 1589184284Ssam if (m == NULL) { 1590184284Ssam /* NB: cannot happen */ 1591184284Ssam ieee80211_free_node(ni); 1592148315Ssam return ENOMEM; 1593184284Ssam } 1594148315Ssam 1595148315Ssam wh = mtod(m, struct ieee80211_frame *); 1596178354Ssam ieee80211_send_setup(ni, wh, 1597184282Ssam IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ, 1598184282Ssam IEEE80211_NONQOS_TID, sa, da, bssid); 1599148315Ssam /* XXX power management? */ 1600184286Ssam m->m_flags |= M_ENCAP; /* mark encapsulated */ 1601148315Ssam 1602178354Ssam M_WME_SETAC(m, WME_AC_BE); 1603178354Ssam 1604148315Ssam IEEE80211_NODE_STAT(ni, tx_probereq); 1605148315Ssam IEEE80211_NODE_STAT(ni, tx_mgmt); 1606148315Ssam 1607178354Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS, 1608178354Ssam "send probe req on channel %u bssid %s ssid \"%.*s\"\n", 1609178354Ssam ieee80211_chan2ieee(ic, ic->ic_curchan), ether_sprintf(bssid), 1610178354Ssam ssidlen, ssid); 1611148315Ssam 1612184284Ssam memset(¶ms, 0, sizeof(params)); 1613184284Ssam params.ibp_pri = M_WME_GETAC(m); 1614184284Ssam tp = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)]; 1615184284Ssam params.ibp_rate0 = tp->mgmtrate; 1616184284Ssam if (IEEE80211_IS_MULTICAST(da)) { 1617184284Ssam params.ibp_flags |= IEEE80211_BPF_NOACK; 1618184284Ssam params.ibp_try0 = 1; 1619184284Ssam } else 1620184284Ssam params.ibp_try0 = tp->maxretry; 1621184284Ssam params.ibp_power = ni->ni_txpower; 1622184284Ssam return ic->ic_raw_xmit(ni, m, ¶ms); 1623148315Ssam} 1624148315Ssam 1625148315Ssam/* 1626155999Ssam * Calculate capability information for mgt frames. 1627155999Ssam */ 1628170530Ssamstatic uint16_t 1629178354Ssamgetcapinfo(struct ieee80211vap *vap, struct ieee80211_channel *chan) 1630155999Ssam{ 1631178354Ssam struct ieee80211com *ic = vap->iv_ic; 1632170530Ssam uint16_t capinfo; 1633155999Ssam 1634178354Ssam KASSERT(vap->iv_opmode != IEEE80211_M_STA, ("station mode")); 1635155999Ssam 1636178354Ssam if (vap->iv_opmode == IEEE80211_M_HOSTAP) 1637155999Ssam capinfo = IEEE80211_CAPINFO_ESS; 1638178354Ssam else if (vap->iv_opmode == IEEE80211_M_IBSS) 1639155999Ssam capinfo = IEEE80211_CAPINFO_IBSS; 1640155999Ssam else 1641155999Ssam capinfo = 0; 1642178354Ssam if (vap->iv_flags & IEEE80211_F_PRIVACY) 1643155999Ssam capinfo |= IEEE80211_CAPINFO_PRIVACY; 1644155999Ssam if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && 1645155999Ssam IEEE80211_IS_CHAN_2GHZ(chan)) 1646155999Ssam capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE; 1647155999Ssam if (ic->ic_flags & IEEE80211_F_SHSLOT) 1648155999Ssam capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME; 1649178354Ssam if (IEEE80211_IS_CHAN_5GHZ(chan) && (vap->iv_flags & IEEE80211_F_DOTH)) 1650178354Ssam capinfo |= IEEE80211_CAPINFO_SPECTRUM_MGMT; 1651155999Ssam return capinfo; 1652155999Ssam} 1653155999Ssam 1654155999Ssam/* 1655119150Ssam * Send a management frame. The node is for the destination (or ic_bss 1656119150Ssam * when in station mode). Nodes other than ic_bss have their reference 1657119150Ssam * count bumped to reflect our use for an indeterminant time. 1658119150Ssam */ 1659116742Ssamint 1660178354Ssamieee80211_send_mgmt(struct ieee80211_node *ni, int type, int arg) 1661116742Ssam{ 1662173273Ssam#define HTFLAGS (IEEE80211_NODE_HT | IEEE80211_NODE_HTCOMPAT) 1663178354Ssam#define senderr(_x, _v) do { vap->iv_stats._v++; ret = _x; goto bad; } while (0) 1664178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1665178354Ssam struct ieee80211com *ic = ni->ni_ic; 1666178354Ssam struct ieee80211_node *bss = vap->iv_bss; 1667184282Ssam struct ieee80211_bpf_params params; 1668116742Ssam struct mbuf *m; 1669170530Ssam uint8_t *frm; 1670170530Ssam uint16_t capinfo; 1671170530Ssam int has_challenge, is_shared_key, ret, status; 1672116742Ssam 1673119150Ssam KASSERT(ni != NULL, ("null node")); 1674119150Ssam 1675119150Ssam /* 1676119150Ssam * Hold a reference on the node so it doesn't go away until after 1677119150Ssam * the xmit is complete all the way in the driver. On error we 1678119150Ssam * will remove our reference. 1679119150Ssam */ 1680178354Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1681140766Ssam "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", 1682138568Ssam __func__, __LINE__, 1683140766Ssam ni, ether_sprintf(ni->ni_macaddr), 1684140766Ssam ieee80211_node_refcnt(ni)+1); 1685138568Ssam ieee80211_ref_node(ni); 1686138568Ssam 1687184282Ssam memset(¶ms, 0, sizeof(params)); 1688116742Ssam switch (type) { 1689116742Ssam 1690116742Ssam case IEEE80211_FC0_SUBTYPE_AUTH: 1691138568Ssam status = arg >> 16; 1692138568Ssam arg &= 0xffff; 1693138568Ssam has_challenge = ((arg == IEEE80211_AUTH_SHARED_CHALLENGE || 1694138568Ssam arg == IEEE80211_AUTH_SHARED_RESPONSE) && 1695138568Ssam ni->ni_challenge != NULL); 1696138568Ssam 1697138568Ssam /* 1698138568Ssam * Deduce whether we're doing open authentication or 1699138568Ssam * shared key authentication. We do the latter if 1700138568Ssam * we're in the middle of a shared key authentication 1701138568Ssam * handshake or if we're initiating an authentication 1702138568Ssam * request and configured to use shared key. 1703138568Ssam */ 1704138568Ssam is_shared_key = has_challenge || 1705138568Ssam arg >= IEEE80211_AUTH_SHARED_RESPONSE || 1706138568Ssam (arg == IEEE80211_AUTH_SHARED_REQUEST && 1707178354Ssam bss->ni_authmode == IEEE80211_AUTH_SHARED); 1708138568Ssam 1709138568Ssam m = ieee80211_getmgtframe(&frm, 1710184282Ssam ic->ic_headroom + sizeof(struct ieee80211_frame), 1711170530Ssam 3 * sizeof(uint16_t) 1712138568Ssam + (has_challenge && status == IEEE80211_STATUS_SUCCESS ? 1713170530Ssam sizeof(uint16_t)+IEEE80211_CHALLENGE_LEN : 0) 1714138568Ssam ); 1715116742Ssam if (m == NULL) 1716138568Ssam senderr(ENOMEM, is_tx_nobuf); 1717138568Ssam 1718170530Ssam ((uint16_t *)frm)[0] = 1719138568Ssam (is_shared_key) ? htole16(IEEE80211_AUTH_ALG_SHARED) 1720138568Ssam : htole16(IEEE80211_AUTH_ALG_OPEN); 1721170530Ssam ((uint16_t *)frm)[1] = htole16(arg); /* sequence number */ 1722170530Ssam ((uint16_t *)frm)[2] = htole16(status);/* status */ 1723138568Ssam 1724138568Ssam if (has_challenge && status == IEEE80211_STATUS_SUCCESS) { 1725170530Ssam ((uint16_t *)frm)[3] = 1726138568Ssam htole16((IEEE80211_CHALLENGE_LEN << 8) | 1727138568Ssam IEEE80211_ELEMID_CHALLENGE); 1728170530Ssam memcpy(&((uint16_t *)frm)[4], ni->ni_challenge, 1729138568Ssam IEEE80211_CHALLENGE_LEN); 1730138568Ssam m->m_pkthdr.len = m->m_len = 1731170530Ssam 4 * sizeof(uint16_t) + IEEE80211_CHALLENGE_LEN; 1732138568Ssam if (arg == IEEE80211_AUTH_SHARED_RESPONSE) { 1733178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni, 1734178354Ssam "request encrypt frame (%s)", __func__); 1735184282Ssam /* mark frame for encryption */ 1736184282Ssam params.ibp_flags |= IEEE80211_BPF_CRYPTO; 1737138568Ssam } 1738138568Ssam } else 1739170530Ssam m->m_pkthdr.len = m->m_len = 3 * sizeof(uint16_t); 1740138568Ssam 1741138568Ssam /* XXX not right for shared key */ 1742138568Ssam if (status == IEEE80211_STATUS_SUCCESS) 1743138568Ssam IEEE80211_NODE_STAT(ni, tx_auth); 1744138568Ssam else 1745138568Ssam IEEE80211_NODE_STAT(ni, tx_auth_fail); 1746138568Ssam 1747178354Ssam if (vap->iv_opmode == IEEE80211_M_STA) 1748170530Ssam ieee80211_add_callback(m, ieee80211_tx_mgt_cb, 1749178354Ssam (void *) vap->iv_state); 1750116742Ssam break; 1751116742Ssam 1752116742Ssam case IEEE80211_FC0_SUBTYPE_DEAUTH: 1753178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni, 1754178354Ssam "send station deauthenticate (reason %d)", arg); 1755170530Ssam m = ieee80211_getmgtframe(&frm, 1756170530Ssam ic->ic_headroom + sizeof(struct ieee80211_frame), 1757170530Ssam sizeof(uint16_t)); 1758116742Ssam if (m == NULL) 1759138568Ssam senderr(ENOMEM, is_tx_nobuf); 1760170530Ssam *(uint16_t *)frm = htole16(arg); /* reason */ 1761170530Ssam m->m_pkthdr.len = m->m_len = sizeof(uint16_t); 1762138568Ssam 1763138568Ssam IEEE80211_NODE_STAT(ni, tx_deauth); 1764138568Ssam IEEE80211_NODE_STAT_SET(ni, tx_deauth_code, arg); 1765138568Ssam 1766148302Ssam ieee80211_node_unauthorize(ni); /* port closed */ 1767116742Ssam break; 1768116742Ssam 1769116742Ssam case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 1770116742Ssam case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 1771116742Ssam /* 1772116742Ssam * asreq frame format 1773116742Ssam * [2] capability information 1774116742Ssam * [2] listen interval 1775116742Ssam * [6*] current AP address (reassoc only) 1776116742Ssam * [tlv] ssid 1777116742Ssam * [tlv] supported rates 1778116742Ssam * [tlv] extended supported rates 1779178354Ssam * [4] power capability (optional) 1780178354Ssam * [28] supported channels (optional) 1781170530Ssam * [tlv] HT capabilities 1782178354Ssam * [tlv] WME (optional) 1783170530Ssam * [tlv] Vendor OUI HT capabilities (optional) 1784170530Ssam * [tlv] Atheros capabilities (if negotiated) 1785178354Ssam * [tlv] AppIE's (optional) 1786116742Ssam */ 1787138568Ssam m = ieee80211_getmgtframe(&frm, 1788170530Ssam ic->ic_headroom + sizeof(struct ieee80211_frame), 1789170530Ssam sizeof(uint16_t) 1790170530Ssam + sizeof(uint16_t) 1791116742Ssam + IEEE80211_ADDR_LEN 1792138568Ssam + 2 + IEEE80211_NWID_LEN 1793116742Ssam + 2 + IEEE80211_RATE_SIZE 1794138568Ssam + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 1795178354Ssam + 4 1796178354Ssam + 2 + 26 1797138568Ssam + sizeof(struct ieee80211_wme_info) 1798178354Ssam + sizeof(struct ieee80211_ie_htcap) 1799178354Ssam + 4 + sizeof(struct ieee80211_ie_htcap) 1800190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 1801170530Ssam + sizeof(struct ieee80211_ath_ie) 1802190391Ssam#endif 1803178354Ssam + (vap->iv_appie_wpa != NULL ? 1804178354Ssam vap->iv_appie_wpa->ie_len : 0) 1805178354Ssam + (vap->iv_appie_assocreq != NULL ? 1806178354Ssam vap->iv_appie_assocreq->ie_len : 0) 1807138568Ssam ); 1808116742Ssam if (m == NULL) 1809138568Ssam senderr(ENOMEM, is_tx_nobuf); 1810116742Ssam 1811178354Ssam KASSERT(vap->iv_opmode == IEEE80211_M_STA, 1812178354Ssam ("wrong mode %u", vap->iv_opmode)); 1813155999Ssam capinfo = IEEE80211_CAPINFO_ESS; 1814178354Ssam if (vap->iv_flags & IEEE80211_F_PRIVACY) 1815116742Ssam capinfo |= IEEE80211_CAPINFO_PRIVACY; 1816120070Ssam /* 1817120070Ssam * NB: Some 11a AP's reject the request when 1818120070Ssam * short premable is set. 1819120070Ssam */ 1820120070Ssam if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && 1821148936Ssam IEEE80211_IS_CHAN_2GHZ(ic->ic_curchan)) 1822116742Ssam capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE; 1823170530Ssam if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 1824138568Ssam (ic->ic_caps & IEEE80211_C_SHSLOT)) 1825116742Ssam capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME; 1826173273Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_SPECTRUM_MGMT) && 1827178354Ssam (vap->iv_flags & IEEE80211_F_DOTH)) 1828173273Ssam capinfo |= IEEE80211_CAPINFO_SPECTRUM_MGMT; 1829170530Ssam *(uint16_t *)frm = htole16(capinfo); 1830116742Ssam frm += 2; 1831116742Ssam 1832178354Ssam KASSERT(bss->ni_intval != 0, ("beacon interval is zero!")); 1833170530Ssam *(uint16_t *)frm = htole16(howmany(ic->ic_lintval, 1834178354Ssam bss->ni_intval)); 1835116742Ssam frm += 2; 1836116742Ssam 1837116742Ssam if (type == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) { 1838178354Ssam IEEE80211_ADDR_COPY(frm, bss->ni_bssid); 1839116742Ssam frm += IEEE80211_ADDR_LEN; 1840116742Ssam } 1841116742Ssam 1842116742Ssam frm = ieee80211_add_ssid(frm, ni->ni_essid, ni->ni_esslen); 1843116742Ssam frm = ieee80211_add_rates(frm, &ni->ni_rates); 1844178354Ssam if (vap->iv_flags & IEEE80211_F_WPA2) { 1845178354Ssam if (vap->iv_rsn_ie != NULL) 1846178354Ssam frm = add_ie(frm, vap->iv_rsn_ie); 1847178354Ssam /* XXX else complain? */ 1848178354Ssam } 1849116742Ssam frm = ieee80211_add_xrates(frm, &ni->ni_rates); 1850178354Ssam if (capinfo & IEEE80211_CAPINFO_SPECTRUM_MGMT) { 1851178354Ssam frm = ieee80211_add_powercapability(frm, 1852178354Ssam ic->ic_curchan); 1853178354Ssam frm = ieee80211_add_supportedchannels(frm, ic); 1854178354Ssam } 1855178354Ssam if ((vap->iv_flags_ext & IEEE80211_FEXT_HT) && 1856178354Ssam ni->ni_ies.htcap_ie != NULL && 1857178354Ssam ni->ni_ies.htcap_ie[0] == IEEE80211_ELEMID_HTCAP) 1858173273Ssam frm = ieee80211_add_htcap(frm, ni); 1859178354Ssam if (vap->iv_flags & IEEE80211_F_WPA1) { 1860178354Ssam if (vap->iv_wpa_ie != NULL) 1861178354Ssam frm = add_ie(frm, vap->iv_wpa_ie); 1862178354Ssam /* XXX else complain */ 1863178354Ssam } 1864178354Ssam if ((ic->ic_flags & IEEE80211_F_WME) && 1865178354Ssam ni->ni_ies.wme_ie != NULL) 1866138568Ssam frm = ieee80211_add_wme_info(frm, &ic->ic_wme); 1867178354Ssam if ((vap->iv_flags_ext & IEEE80211_FEXT_HT) && 1868178354Ssam ni->ni_ies.htcap_ie != NULL && 1869178354Ssam ni->ni_ies.htcap_ie[0] == IEEE80211_ELEMID_VENDOR) 1870173273Ssam frm = ieee80211_add_htcap_vendor(frm, ni); 1871190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 1872190451Ssam if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS)) { 1873190451Ssam frm = ieee80211_add_ath(frm, 1874178354Ssam IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS), 1875190451Ssam ((vap->iv_flags & IEEE80211_F_WPA) == 0 && 1876190451Ssam ni->ni_authmode != IEEE80211_AUTH_8021X) ? 1877190451Ssam vap->iv_def_txkey : IEEE80211_KEYIX_NONE); 1878190451Ssam } 1879190391Ssam#endif /* IEEE80211_SUPPORT_SUPERG */ 1880178354Ssam if (vap->iv_appie_assocreq != NULL) 1881178354Ssam frm = add_appie(frm, vap->iv_appie_assocreq); 1882170530Ssam m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 1883116742Ssam 1884170530Ssam ieee80211_add_callback(m, ieee80211_tx_mgt_cb, 1885178354Ssam (void *) vap->iv_state); 1886116742Ssam break; 1887116742Ssam 1888116742Ssam case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 1889116742Ssam case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 1890116742Ssam /* 1891170530Ssam * asresp frame format 1892116742Ssam * [2] capability information 1893116742Ssam * [2] status 1894116742Ssam * [2] association ID 1895116742Ssam * [tlv] supported rates 1896116742Ssam * [tlv] extended supported rates 1897178354Ssam * [tlv] HT capabilities (standard, if STA enabled) 1898178354Ssam * [tlv] HT information (standard, if STA enabled) 1899178354Ssam * [tlv] WME (if configured and STA enabled) 1900178354Ssam * [tlv] HT capabilities (vendor OUI, if STA enabled) 1901178354Ssam * [tlv] HT information (vendor OUI, if STA enabled) 1902178354Ssam * [tlv] Atheros capabilities (if STA enabled) 1903178354Ssam * [tlv] AppIE's (optional) 1904116742Ssam */ 1905138568Ssam m = ieee80211_getmgtframe(&frm, 1906170530Ssam ic->ic_headroom + sizeof(struct ieee80211_frame), 1907170530Ssam sizeof(uint16_t) 1908170530Ssam + sizeof(uint16_t) 1909170530Ssam + sizeof(uint16_t) 1910116742Ssam + 2 + IEEE80211_RATE_SIZE 1911138568Ssam + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 1912170530Ssam + sizeof(struct ieee80211_ie_htcap) + 4 1913170530Ssam + sizeof(struct ieee80211_ie_htinfo) + 4 1914178354Ssam + sizeof(struct ieee80211_wme_param) 1915190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 1916170530Ssam + sizeof(struct ieee80211_ath_ie) 1917190391Ssam#endif 1918178354Ssam + (vap->iv_appie_assocresp != NULL ? 1919178354Ssam vap->iv_appie_assocresp->ie_len : 0) 1920138568Ssam ); 1921116742Ssam if (m == NULL) 1922138568Ssam senderr(ENOMEM, is_tx_nobuf); 1923116742Ssam 1924178354Ssam capinfo = getcapinfo(vap, bss->ni_chan); 1925170530Ssam *(uint16_t *)frm = htole16(capinfo); 1926116742Ssam frm += 2; 1927116742Ssam 1928170530Ssam *(uint16_t *)frm = htole16(arg); /* status */ 1929116742Ssam frm += 2; 1930116742Ssam 1931138568Ssam if (arg == IEEE80211_STATUS_SUCCESS) { 1932170530Ssam *(uint16_t *)frm = htole16(ni->ni_associd); 1933138568Ssam IEEE80211_NODE_STAT(ni, tx_assoc); 1934138568Ssam } else 1935138568Ssam IEEE80211_NODE_STAT(ni, tx_assoc_fail); 1936116742Ssam frm += 2; 1937116742Ssam 1938119150Ssam frm = ieee80211_add_rates(frm, &ni->ni_rates); 1939119150Ssam frm = ieee80211_add_xrates(frm, &ni->ni_rates); 1940173273Ssam /* NB: respond according to what we received */ 1941173273Ssam if ((ni->ni_flags & HTFLAGS) == IEEE80211_NODE_HT) { 1942173273Ssam frm = ieee80211_add_htcap(frm, ni); 1943173273Ssam frm = ieee80211_add_htinfo(frm, ni); 1944173273Ssam } 1945178354Ssam if ((vap->iv_flags & IEEE80211_F_WME) && 1946178354Ssam ni->ni_ies.wme_ie != NULL) 1947138568Ssam frm = ieee80211_add_wme_param(frm, &ic->ic_wme); 1948173273Ssam if ((ni->ni_flags & HTFLAGS) == HTFLAGS) { 1949173273Ssam frm = ieee80211_add_htcap_vendor(frm, ni); 1950173273Ssam frm = ieee80211_add_htinfo_vendor(frm, ni); 1951170530Ssam } 1952190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 1953178354Ssam if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS)) 1954190451Ssam frm = ieee80211_add_ath(frm, 1955178354Ssam IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS), 1956190451Ssam ((vap->iv_flags & IEEE80211_F_WPA) == 0 && 1957190451Ssam ni->ni_authmode != IEEE80211_AUTH_8021X) ? 1958190451Ssam vap->iv_def_txkey : IEEE80211_KEYIX_NONE); 1959190391Ssam#endif /* IEEE80211_SUPPORT_SUPERG */ 1960178354Ssam if (vap->iv_appie_assocresp != NULL) 1961178354Ssam frm = add_appie(frm, vap->iv_appie_assocresp); 1962170530Ssam m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 1963116742Ssam break; 1964116742Ssam 1965116742Ssam case IEEE80211_FC0_SUBTYPE_DISASSOC: 1966178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 1967178354Ssam "send station disassociate (reason %d)", arg); 1968170530Ssam m = ieee80211_getmgtframe(&frm, 1969170530Ssam ic->ic_headroom + sizeof(struct ieee80211_frame), 1970170530Ssam sizeof(uint16_t)); 1971116742Ssam if (m == NULL) 1972138568Ssam senderr(ENOMEM, is_tx_nobuf); 1973170530Ssam *(uint16_t *)frm = htole16(arg); /* reason */ 1974170530Ssam m->m_pkthdr.len = m->m_len = sizeof(uint16_t); 1975138568Ssam 1976138568Ssam IEEE80211_NODE_STAT(ni, tx_disassoc); 1977138568Ssam IEEE80211_NODE_STAT_SET(ni, tx_disassoc_code, arg); 1978116742Ssam break; 1979116742Ssam 1980116742Ssam default: 1981178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ANY, ni, 1982178354Ssam "invalid mgmt frame type %u", type); 1983121180Ssam senderr(EINVAL, is_tx_unknownmgt); 1984119150Ssam /* NOTREACHED */ 1985116742Ssam } 1986170530Ssam 1987184282Ssam /* NB: force non-ProbeResp frames to the highest queue */ 1988184282Ssam params.ibp_pri = WME_AC_VO; 1989184282Ssam params.ibp_rate0 = bss->ni_txparms->mgmtrate; 1990184282Ssam /* NB: we know all frames are unicast */ 1991184282Ssam params.ibp_try0 = bss->ni_txparms->maxretry; 1992184282Ssam params.ibp_power = bss->ni_txpower; 1993184282Ssam return ieee80211_mgmt_output(ni, m, type, ¶ms); 1994119150Ssambad: 1995170530Ssam ieee80211_free_node(ni); 1996116742Ssam return ret; 1997119150Ssam#undef senderr 1998173273Ssam#undef HTFLAGS 1999116742Ssam} 2000138568Ssam 2001178354Ssam/* 2002178354Ssam * Return an mbuf with a probe response frame in it. 2003178354Ssam * Space is left to prepend and 802.11 header at the 2004178354Ssam * front but it's left to the caller to fill in. 2005178354Ssam */ 2006178354Ssamstruct mbuf * 2007178354Ssamieee80211_alloc_proberesp(struct ieee80211_node *bss, int legacy) 2008178354Ssam{ 2009178354Ssam struct ieee80211vap *vap = bss->ni_vap; 2010178354Ssam struct ieee80211com *ic = bss->ni_ic; 2011178354Ssam const struct ieee80211_rateset *rs; 2012178354Ssam struct mbuf *m; 2013178354Ssam uint16_t capinfo; 2014178354Ssam uint8_t *frm; 2015178354Ssam 2016178354Ssam /* 2017178354Ssam * probe response frame format 2018178354Ssam * [8] time stamp 2019178354Ssam * [2] beacon interval 2020178354Ssam * [2] cabability information 2021178354Ssam * [tlv] ssid 2022178354Ssam * [tlv] supported rates 2023178354Ssam * [tlv] parameter set (FH/DS) 2024178354Ssam * [tlv] parameter set (IBSS) 2025178354Ssam * [tlv] country (optional) 2026178354Ssam * [3] power control (optional) 2027178354Ssam * [5] channel switch announcement (CSA) (optional) 2028178354Ssam * [tlv] extended rate phy (ERP) 2029178354Ssam * [tlv] extended supported rates 2030180351Ssam * [tlv] RSN (optional) 2031178354Ssam * [tlv] HT capabilities 2032178354Ssam * [tlv] HT information 2033178354Ssam * [tlv] WPA (optional) 2034178354Ssam * [tlv] WME (optional) 2035178354Ssam * [tlv] Vendor OUI HT capabilities (optional) 2036178354Ssam * [tlv] Vendor OUI HT information (optional) 2037178354Ssam * [tlv] Atheros capabilities 2038178354Ssam * [tlv] AppIE's (optional) 2039178354Ssam */ 2040178354Ssam m = ieee80211_getmgtframe(&frm, 2041178354Ssam ic->ic_headroom + sizeof(struct ieee80211_frame), 2042178354Ssam 8 2043178354Ssam + sizeof(uint16_t) 2044178354Ssam + sizeof(uint16_t) 2045178354Ssam + 2 + IEEE80211_NWID_LEN 2046178354Ssam + 2 + IEEE80211_RATE_SIZE 2047178354Ssam + 7 /* max(7,3) */ 2048178354Ssam + IEEE80211_COUNTRY_MAX_SIZE 2049178354Ssam + 3 2050178354Ssam + sizeof(struct ieee80211_csa_ie) 2051178354Ssam + 3 2052178354Ssam + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2053180351Ssam + sizeof(struct ieee80211_ie_wpa) 2054178354Ssam + sizeof(struct ieee80211_ie_htcap) 2055178354Ssam + sizeof(struct ieee80211_ie_htinfo) 2056178354Ssam + sizeof(struct ieee80211_ie_wpa) 2057178354Ssam + sizeof(struct ieee80211_wme_param) 2058178354Ssam + 4 + sizeof(struct ieee80211_ie_htcap) 2059178354Ssam + 4 + sizeof(struct ieee80211_ie_htinfo) 2060190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 2061178354Ssam + sizeof(struct ieee80211_ath_ie) 2062190391Ssam#endif 2063178354Ssam + (vap->iv_appie_proberesp != NULL ? 2064178354Ssam vap->iv_appie_proberesp->ie_len : 0) 2065178354Ssam ); 2066178354Ssam if (m == NULL) { 2067178354Ssam vap->iv_stats.is_tx_nobuf++; 2068178354Ssam return NULL; 2069178354Ssam } 2070178354Ssam 2071178354Ssam memset(frm, 0, 8); /* timestamp should be filled later */ 2072178354Ssam frm += 8; 2073178354Ssam *(uint16_t *)frm = htole16(bss->ni_intval); 2074178354Ssam frm += 2; 2075178354Ssam capinfo = getcapinfo(vap, bss->ni_chan); 2076178354Ssam *(uint16_t *)frm = htole16(capinfo); 2077178354Ssam frm += 2; 2078178354Ssam 2079178354Ssam frm = ieee80211_add_ssid(frm, bss->ni_essid, bss->ni_esslen); 2080178354Ssam rs = ieee80211_get_suprates(ic, bss->ni_chan); 2081178354Ssam frm = ieee80211_add_rates(frm, rs); 2082178354Ssam 2083178354Ssam if (IEEE80211_IS_CHAN_FHSS(bss->ni_chan)) { 2084178354Ssam *frm++ = IEEE80211_ELEMID_FHPARMS; 2085178354Ssam *frm++ = 5; 2086178354Ssam *frm++ = bss->ni_fhdwell & 0x00ff; 2087178354Ssam *frm++ = (bss->ni_fhdwell >> 8) & 0x00ff; 2088178354Ssam *frm++ = IEEE80211_FH_CHANSET( 2089178354Ssam ieee80211_chan2ieee(ic, bss->ni_chan)); 2090178354Ssam *frm++ = IEEE80211_FH_CHANPAT( 2091178354Ssam ieee80211_chan2ieee(ic, bss->ni_chan)); 2092178354Ssam *frm++ = bss->ni_fhindex; 2093178354Ssam } else { 2094178354Ssam *frm++ = IEEE80211_ELEMID_DSPARMS; 2095178354Ssam *frm++ = 1; 2096178354Ssam *frm++ = ieee80211_chan2ieee(ic, bss->ni_chan); 2097178354Ssam } 2098178354Ssam 2099178354Ssam if (vap->iv_opmode == IEEE80211_M_IBSS) { 2100178354Ssam *frm++ = IEEE80211_ELEMID_IBSSPARMS; 2101178354Ssam *frm++ = 2; 2102178354Ssam *frm++ = 0; *frm++ = 0; /* TODO: ATIM window */ 2103178354Ssam } 2104178354Ssam if ((vap->iv_flags & IEEE80211_F_DOTH) || 2105178354Ssam (vap->iv_flags_ext & IEEE80211_FEXT_DOTD)) 2106178354Ssam frm = ieee80211_add_countryie(frm, ic); 2107178354Ssam if (vap->iv_flags & IEEE80211_F_DOTH) { 2108178354Ssam if (IEEE80211_IS_CHAN_5GHZ(bss->ni_chan)) 2109178354Ssam frm = ieee80211_add_powerconstraint(frm, vap); 2110178354Ssam if (ic->ic_flags & IEEE80211_F_CSAPENDING) 2111178354Ssam frm = ieee80211_add_csa(frm, vap); 2112178354Ssam } 2113178354Ssam if (IEEE80211_IS_CHAN_ANYG(bss->ni_chan)) 2114178354Ssam frm = ieee80211_add_erp(frm, ic); 2115178354Ssam frm = ieee80211_add_xrates(frm, rs); 2116180351Ssam if (vap->iv_flags & IEEE80211_F_WPA2) { 2117180351Ssam if (vap->iv_rsn_ie != NULL) 2118180351Ssam frm = add_ie(frm, vap->iv_rsn_ie); 2119180351Ssam /* XXX else complain? */ 2120180351Ssam } 2121178354Ssam /* 2122178354Ssam * NB: legacy 11b clients do not get certain ie's. 2123178354Ssam * The caller identifies such clients by passing 2124178354Ssam * a token in legacy to us. Could expand this to be 2125178354Ssam * any legacy client for stuff like HT ie's. 2126178354Ssam */ 2127178354Ssam if (IEEE80211_IS_CHAN_HT(bss->ni_chan) && 2128178354Ssam legacy != IEEE80211_SEND_LEGACY_11B) { 2129178354Ssam frm = ieee80211_add_htcap(frm, bss); 2130178354Ssam frm = ieee80211_add_htinfo(frm, bss); 2131178354Ssam } 2132178354Ssam if (vap->iv_flags & IEEE80211_F_WPA1) { 2133178354Ssam if (vap->iv_wpa_ie != NULL) 2134178354Ssam frm = add_ie(frm, vap->iv_wpa_ie); 2135178354Ssam /* XXX else complain? */ 2136178354Ssam } 2137178354Ssam if (vap->iv_flags & IEEE80211_F_WME) 2138178354Ssam frm = ieee80211_add_wme_param(frm, &ic->ic_wme); 2139178354Ssam if (IEEE80211_IS_CHAN_HT(bss->ni_chan) && 2140178354Ssam (vap->iv_flags_ext & IEEE80211_FEXT_HTCOMPAT) && 2141178354Ssam legacy != IEEE80211_SEND_LEGACY_11B) { 2142178354Ssam frm = ieee80211_add_htcap_vendor(frm, bss); 2143178354Ssam frm = ieee80211_add_htinfo_vendor(frm, bss); 2144178354Ssam } 2145190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 2146190451Ssam if ((vap->iv_flags & IEEE80211_F_ATHEROS) && 2147190451Ssam legacy != IEEE80211_SEND_LEGACY_11B) 2148190451Ssam frm = ieee80211_add_athcaps(frm, bss); 2149190391Ssam#endif 2150178354Ssam if (vap->iv_appie_proberesp != NULL) 2151178354Ssam frm = add_appie(frm, vap->iv_appie_proberesp); 2152178354Ssam m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2153178354Ssam 2154178354Ssam return m; 2155178354Ssam} 2156178354Ssam 2157178354Ssam/* 2158178354Ssam * Send a probe response frame to the specified mac address. 2159178354Ssam * This does not go through the normal mgt frame api so we 2160178354Ssam * can specify the destination address and re-use the bss node 2161178354Ssam * for the sta reference. 2162178354Ssam */ 2163178354Ssamint 2164178354Ssamieee80211_send_proberesp(struct ieee80211vap *vap, 2165178354Ssam const uint8_t da[IEEE80211_ADDR_LEN], int legacy) 2166178354Ssam{ 2167178354Ssam struct ieee80211_node *bss = vap->iv_bss; 2168178354Ssam struct ieee80211com *ic = vap->iv_ic; 2169178354Ssam struct ieee80211_frame *wh; 2170178354Ssam struct mbuf *m; 2171178354Ssam 2172178354Ssam if (vap->iv_state == IEEE80211_S_CAC) { 2173178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, bss, 2174178354Ssam "block %s frame in CAC state", "probe response"); 2175178354Ssam vap->iv_stats.is_tx_badstate++; 2176178354Ssam return EIO; /* XXX */ 2177178354Ssam } 2178178354Ssam 2179178354Ssam /* 2180178354Ssam * Hold a reference on the node so it doesn't go away until after 2181178354Ssam * the xmit is complete all the way in the driver. On error we 2182178354Ssam * will remove our reference. 2183178354Ssam */ 2184178354Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2185178354Ssam "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", 2186178354Ssam __func__, __LINE__, bss, ether_sprintf(bss->ni_macaddr), 2187178354Ssam ieee80211_node_refcnt(bss)+1); 2188178354Ssam ieee80211_ref_node(bss); 2189178354Ssam 2190178354Ssam m = ieee80211_alloc_proberesp(bss, legacy); 2191178354Ssam if (m == NULL) { 2192178354Ssam ieee80211_free_node(bss); 2193178354Ssam return ENOMEM; 2194178354Ssam } 2195178354Ssam 2196178354Ssam M_PREPEND(m, sizeof(struct ieee80211_frame), M_DONTWAIT); 2197178354Ssam KASSERT(m != NULL, ("no room for header")); 2198178354Ssam 2199178354Ssam wh = mtod(m, struct ieee80211_frame *); 2200178354Ssam ieee80211_send_setup(bss, wh, 2201184282Ssam IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_RESP, 2202184282Ssam IEEE80211_NONQOS_TID, vap->iv_myaddr, da, bss->ni_bssid); 2203178354Ssam /* XXX power management? */ 2204184286Ssam m->m_flags |= M_ENCAP; /* mark encapsulated */ 2205178354Ssam 2206178354Ssam M_WME_SETAC(m, WME_AC_BE); 2207178354Ssam 2208178354Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS, 2209178354Ssam "send probe resp on channel %u to %s%s\n", 2210178354Ssam ieee80211_chan2ieee(ic, ic->ic_curchan), ether_sprintf(da), 2211178354Ssam legacy ? " <legacy>" : ""); 2212178354Ssam IEEE80211_NODE_STAT(bss, tx_mgmt); 2213178354Ssam 2214178354Ssam return ic->ic_raw_xmit(bss, m, NULL); 2215178354Ssam} 2216178354Ssam 2217178354Ssam/* 2218178354Ssam * Allocate and build a RTS (Request To Send) control frame. 2219178354Ssam */ 2220178354Ssamstruct mbuf * 2221178354Ssamieee80211_alloc_rts(struct ieee80211com *ic, 2222178354Ssam const uint8_t ra[IEEE80211_ADDR_LEN], 2223178354Ssam const uint8_t ta[IEEE80211_ADDR_LEN], 2224178354Ssam uint16_t dur) 2225178354Ssam{ 2226178354Ssam struct ieee80211_frame_rts *rts; 2227178354Ssam struct mbuf *m; 2228178354Ssam 2229178354Ssam /* XXX honor ic_headroom */ 2230178354Ssam m = m_gethdr(M_DONTWAIT, MT_DATA); 2231178354Ssam if (m != NULL) { 2232178354Ssam rts = mtod(m, struct ieee80211_frame_rts *); 2233178354Ssam rts->i_fc[0] = IEEE80211_FC0_VERSION_0 | 2234178354Ssam IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_RTS; 2235178354Ssam rts->i_fc[1] = IEEE80211_FC1_DIR_NODS; 2236178354Ssam *(u_int16_t *)rts->i_dur = htole16(dur); 2237178354Ssam IEEE80211_ADDR_COPY(rts->i_ra, ra); 2238178354Ssam IEEE80211_ADDR_COPY(rts->i_ta, ta); 2239178354Ssam 2240178354Ssam m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_rts); 2241178354Ssam } 2242178354Ssam return m; 2243178354Ssam} 2244178354Ssam 2245178354Ssam/* 2246178354Ssam * Allocate and build a CTS (Clear To Send) control frame. 2247178354Ssam */ 2248178354Ssamstruct mbuf * 2249178354Ssamieee80211_alloc_cts(struct ieee80211com *ic, 2250178354Ssam const uint8_t ra[IEEE80211_ADDR_LEN], uint16_t dur) 2251178354Ssam{ 2252178354Ssam struct ieee80211_frame_cts *cts; 2253178354Ssam struct mbuf *m; 2254178354Ssam 2255178354Ssam /* XXX honor ic_headroom */ 2256178354Ssam m = m_gethdr(M_DONTWAIT, MT_DATA); 2257178354Ssam if (m != NULL) { 2258178354Ssam cts = mtod(m, struct ieee80211_frame_cts *); 2259178354Ssam cts->i_fc[0] = IEEE80211_FC0_VERSION_0 | 2260178354Ssam IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_CTS; 2261178354Ssam cts->i_fc[1] = IEEE80211_FC1_DIR_NODS; 2262178354Ssam *(u_int16_t *)cts->i_dur = htole16(dur); 2263178354Ssam IEEE80211_ADDR_COPY(cts->i_ra, ra); 2264178354Ssam 2265178354Ssam m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_cts); 2266178354Ssam } 2267178354Ssam return m; 2268178354Ssam} 2269178354Ssam 2270170530Ssamstatic void 2271170530Ssamieee80211_tx_mgt_timeout(void *arg) 2272170530Ssam{ 2273170530Ssam struct ieee80211_node *ni = arg; 2274178354Ssam struct ieee80211vap *vap = ni->ni_vap; 2275170530Ssam 2276178354Ssam if (vap->iv_state != IEEE80211_S_INIT && 2277178354Ssam (vap->iv_ic->ic_flags & IEEE80211_F_SCAN) == 0) { 2278170530Ssam /* 2279170530Ssam * NB: it's safe to specify a timeout as the reason here; 2280170530Ssam * it'll only be used in the right state. 2281170530Ssam */ 2282178354Ssam ieee80211_new_state(vap, IEEE80211_S_SCAN, 2283170530Ssam IEEE80211_SCAN_FAIL_TIMEOUT); 2284170530Ssam } 2285170530Ssam} 2286170530Ssam 2287170530Ssamstatic void 2288170530Ssamieee80211_tx_mgt_cb(struct ieee80211_node *ni, void *arg, int status) 2289170530Ssam{ 2290178354Ssam struct ieee80211vap *vap = ni->ni_vap; 2291170530Ssam enum ieee80211_state ostate = (enum ieee80211_state) arg; 2292170530Ssam 2293170530Ssam /* 2294170530Ssam * Frame transmit completed; arrange timer callback. If 2295170530Ssam * transmit was successfuly we wait for response. Otherwise 2296170530Ssam * we arrange an immediate callback instead of doing the 2297170530Ssam * callback directly since we don't know what state the driver 2298170530Ssam * is in (e.g. what locks it is holding). This work should 2299170530Ssam * not be too time-critical and not happen too often so the 2300170530Ssam * added overhead is acceptable. 2301170530Ssam * 2302170530Ssam * XXX what happens if !acked but response shows up before callback? 2303170530Ssam */ 2304178354Ssam if (vap->iv_state == ostate) 2305178354Ssam callout_reset(&vap->iv_mgtsend, 2306170530Ssam status == 0 ? IEEE80211_TRANS_WAIT*hz : 0, 2307170530Ssam ieee80211_tx_mgt_timeout, ni); 2308170530Ssam} 2309170530Ssam 2310178354Ssamstatic void 2311178354Ssamieee80211_beacon_construct(struct mbuf *m, uint8_t *frm, 2312178354Ssam struct ieee80211_beacon_offsets *bo, struct ieee80211_node *ni) 2313138568Ssam{ 2314178354Ssam struct ieee80211vap *vap = ni->ni_vap; 2315172211Ssam struct ieee80211com *ic = ni->ni_ic; 2316178354Ssam struct ieee80211_rateset *rs = &ni->ni_rates; 2317170530Ssam uint16_t capinfo; 2318138568Ssam 2319138568Ssam /* 2320138568Ssam * beacon frame format 2321138568Ssam * [8] time stamp 2322138568Ssam * [2] beacon interval 2323138568Ssam * [2] cabability information 2324138568Ssam * [tlv] ssid 2325138568Ssam * [tlv] supported rates 2326138568Ssam * [3] parameter set (DS) 2327178354Ssam * [8] CF parameter set (optional) 2328138568Ssam * [tlv] parameter set (IBSS/TIM) 2329178354Ssam * [tlv] country (optional) 2330178354Ssam * [3] power control (optional) 2331178354Ssam * [5] channel switch announcement (CSA) (optional) 2332138568Ssam * [tlv] extended rate phy (ERP) 2333138568Ssam * [tlv] extended supported rates 2334180351Ssam * [tlv] RSN parameters 2335170530Ssam * [tlv] HT capabilities 2336170530Ssam * [tlv] HT information 2337178354Ssam * XXX Vendor-specific OIDs (e.g. Atheros) 2338178354Ssam * [tlv] WPA parameters 2339178354Ssam * [tlv] WME parameters 2340170530Ssam * [tlv] Vendor OUI HT capabilities (optional) 2341170530Ssam * [tlv] Vendor OUI HT information (optional) 2342190451Ssam * [tlv] Atheros capabilities (optional) 2343186904Ssam * [tlv] TDMA parameters (optional) 2344178354Ssam * [tlv] application data (optional) 2345138568Ssam */ 2346138568Ssam 2347173273Ssam memset(bo, 0, sizeof(*bo)); 2348173273Ssam 2349138568Ssam memset(frm, 0, 8); /* XXX timestamp is set by hardware/driver */ 2350138568Ssam frm += 8; 2351170530Ssam *(uint16_t *)frm = htole16(ni->ni_intval); 2352138568Ssam frm += 2; 2353178354Ssam capinfo = getcapinfo(vap, ni->ni_chan); 2354170530Ssam bo->bo_caps = (uint16_t *)frm; 2355170530Ssam *(uint16_t *)frm = htole16(capinfo); 2356138568Ssam frm += 2; 2357138568Ssam *frm++ = IEEE80211_ELEMID_SSID; 2358178354Ssam if ((vap->iv_flags & IEEE80211_F_HIDESSID) == 0) { 2359138568Ssam *frm++ = ni->ni_esslen; 2360138568Ssam memcpy(frm, ni->ni_essid, ni->ni_esslen); 2361138568Ssam frm += ni->ni_esslen; 2362138568Ssam } else 2363138568Ssam *frm++ = 0; 2364138568Ssam frm = ieee80211_add_rates(frm, rs); 2365178354Ssam if (!IEEE80211_IS_CHAN_FHSS(ni->ni_chan)) { 2366138568Ssam *frm++ = IEEE80211_ELEMID_DSPARMS; 2367138568Ssam *frm++ = 1; 2368178354Ssam *frm++ = ieee80211_chan2ieee(ic, ni->ni_chan); 2369138568Ssam } 2370178354Ssam if (ic->ic_flags & IEEE80211_F_PCF) { 2371178354Ssam bo->bo_cfp = frm; 2372178354Ssam frm = ieee80211_add_cfparms(frm, ic); 2373178354Ssam } 2374138568Ssam bo->bo_tim = frm; 2375178354Ssam if (vap->iv_opmode == IEEE80211_M_IBSS) { 2376138568Ssam *frm++ = IEEE80211_ELEMID_IBSSPARMS; 2377138568Ssam *frm++ = 2; 2378138568Ssam *frm++ = 0; *frm++ = 0; /* TODO: ATIM window */ 2379138568Ssam bo->bo_tim_len = 0; 2380178354Ssam } else if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 2381138568Ssam struct ieee80211_tim_ie *tie = (struct ieee80211_tim_ie *) frm; 2382138568Ssam 2383138568Ssam tie->tim_ie = IEEE80211_ELEMID_TIM; 2384138568Ssam tie->tim_len = 4; /* length */ 2385138568Ssam tie->tim_count = 0; /* DTIM count */ 2386178354Ssam tie->tim_period = vap->iv_dtim_period; /* DTIM period */ 2387138568Ssam tie->tim_bitctl = 0; /* bitmap control */ 2388138568Ssam tie->tim_bitmap[0] = 0; /* Partial Virtual Bitmap */ 2389138568Ssam frm += sizeof(struct ieee80211_tim_ie); 2390138568Ssam bo->bo_tim_len = 1; 2391138568Ssam } 2392172211Ssam bo->bo_tim_trailer = frm; 2393178354Ssam if ((vap->iv_flags & IEEE80211_F_DOTH) || 2394178354Ssam (vap->iv_flags_ext & IEEE80211_FEXT_DOTD)) 2395178354Ssam frm = ieee80211_add_countryie(frm, ic); 2396178354Ssam if (vap->iv_flags & IEEE80211_F_DOTH) { 2397178354Ssam if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 2398178354Ssam frm = ieee80211_add_powerconstraint(frm, vap); 2399178354Ssam bo->bo_csa = frm; 2400178354Ssam if (ic->ic_flags & IEEE80211_F_CSAPENDING) 2401178354Ssam frm = ieee80211_add_csa(frm, vap); 2402178354Ssam } else 2403178354Ssam bo->bo_csa = frm; 2404178354Ssam if (IEEE80211_IS_CHAN_ANYG(ni->ni_chan)) { 2405153973Ssam bo->bo_erp = frm; 2406138568Ssam frm = ieee80211_add_erp(frm, ic); 2407173273Ssam } 2408170530Ssam frm = ieee80211_add_xrates(frm, rs); 2409180351Ssam if (vap->iv_flags & IEEE80211_F_WPA2) { 2410180351Ssam if (vap->iv_rsn_ie != NULL) 2411180351Ssam frm = add_ie(frm, vap->iv_rsn_ie); 2412180351Ssam /* XXX else complain */ 2413180351Ssam } 2414178354Ssam if (IEEE80211_IS_CHAN_HT(ni->ni_chan)) { 2415170530Ssam frm = ieee80211_add_htcap(frm, ni); 2416170530Ssam bo->bo_htinfo = frm; 2417170530Ssam frm = ieee80211_add_htinfo(frm, ni); 2418173273Ssam } 2419178354Ssam if (vap->iv_flags & IEEE80211_F_WPA1) { 2420178354Ssam if (vap->iv_wpa_ie != NULL) 2421178354Ssam frm = add_ie(frm, vap->iv_wpa_ie); 2422178354Ssam /* XXX else complain */ 2423178354Ssam } 2424178354Ssam if (vap->iv_flags & IEEE80211_F_WME) { 2425173273Ssam bo->bo_wme = frm; 2426173273Ssam frm = ieee80211_add_wme_param(frm, &ic->ic_wme); 2427173273Ssam } 2428178354Ssam if (IEEE80211_IS_CHAN_HT(ni->ni_chan) && 2429178354Ssam (vap->iv_flags_ext & IEEE80211_FEXT_HTCOMPAT)) { 2430173273Ssam frm = ieee80211_add_htcap_vendor(frm, ni); 2431173273Ssam frm = ieee80211_add_htinfo_vendor(frm, ni); 2432173273Ssam } 2433190451Ssam#ifdef IEEE80211_SUPPORT_SUPERG 2434190451Ssam if (vap->iv_flags & IEEE80211_F_ATHEROS) { 2435190451Ssam bo->bo_ath = frm; 2436190451Ssam frm = ieee80211_add_athcaps(frm, ni); 2437190451Ssam } 2438190451Ssam#endif 2439186904Ssam#ifdef IEEE80211_SUPPORT_TDMA 2440186904Ssam if (vap->iv_caps & IEEE80211_C_TDMA) { 2441186904Ssam bo->bo_tdma = frm; 2442186904Ssam frm = ieee80211_add_tdma(frm, vap); 2443186904Ssam } 2444186904Ssam#endif 2445178354Ssam if (vap->iv_appie_beacon != NULL) { 2446178354Ssam bo->bo_appie = frm; 2447178354Ssam bo->bo_appie_len = vap->iv_appie_beacon->ie_len; 2448178354Ssam frm = add_appie(frm, vap->iv_appie_beacon); 2449178354Ssam } 2450172211Ssam bo->bo_tim_trailer_len = frm - bo->bo_tim_trailer; 2451178354Ssam bo->bo_csa_trailer_len = frm - bo->bo_csa; 2452170530Ssam m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2453178354Ssam} 2454138568Ssam 2455178354Ssam/* 2456178354Ssam * Allocate a beacon frame and fillin the appropriate bits. 2457178354Ssam */ 2458178354Ssamstruct mbuf * 2459178354Ssamieee80211_beacon_alloc(struct ieee80211_node *ni, 2460178354Ssam struct ieee80211_beacon_offsets *bo) 2461178354Ssam{ 2462178354Ssam struct ieee80211vap *vap = ni->ni_vap; 2463178354Ssam struct ieee80211com *ic = ni->ni_ic; 2464178354Ssam struct ifnet *ifp = vap->iv_ifp; 2465178354Ssam struct ieee80211_frame *wh; 2466178354Ssam struct mbuf *m; 2467178354Ssam int pktlen; 2468178354Ssam uint8_t *frm; 2469178354Ssam 2470178354Ssam /* 2471178354Ssam * beacon frame format 2472178354Ssam * [8] time stamp 2473178354Ssam * [2] beacon interval 2474178354Ssam * [2] cabability information 2475178354Ssam * [tlv] ssid 2476178354Ssam * [tlv] supported rates 2477178354Ssam * [3] parameter set (DS) 2478178354Ssam * [8] CF parameter set (optional) 2479178354Ssam * [tlv] parameter set (IBSS/TIM) 2480178354Ssam * [tlv] country (optional) 2481178354Ssam * [3] power control (optional) 2482178354Ssam * [5] channel switch announcement (CSA) (optional) 2483178354Ssam * [tlv] extended rate phy (ERP) 2484178354Ssam * [tlv] extended supported rates 2485178354Ssam * [tlv] RSN parameters 2486178354Ssam * [tlv] HT capabilities 2487178354Ssam * [tlv] HT information 2488178354Ssam * [tlv] Vendor OUI HT capabilities (optional) 2489178354Ssam * [tlv] Vendor OUI HT information (optional) 2490178354Ssam * XXX Vendor-specific OIDs (e.g. Atheros) 2491178354Ssam * [tlv] WPA parameters 2492178354Ssam * [tlv] WME parameters 2493186904Ssam * [tlv] TDMA parameters (optional) 2494178354Ssam * [tlv] application data (optional) 2495178354Ssam * NB: we allocate the max space required for the TIM bitmap. 2496178354Ssam * XXX how big is this? 2497178354Ssam */ 2498178354Ssam pktlen = 8 /* time stamp */ 2499178354Ssam + sizeof(uint16_t) /* beacon interval */ 2500178354Ssam + sizeof(uint16_t) /* capabilities */ 2501178354Ssam + 2 + ni->ni_esslen /* ssid */ 2502178354Ssam + 2 + IEEE80211_RATE_SIZE /* supported rates */ 2503178354Ssam + 2 + 1 /* DS parameters */ 2504178354Ssam + 2 + 6 /* CF parameters */ 2505178354Ssam + 2 + 4 + vap->iv_tim_len /* DTIM/IBSSPARMS */ 2506178354Ssam + IEEE80211_COUNTRY_MAX_SIZE /* country */ 2507178354Ssam + 2 + 1 /* power control */ 2508178354Ssam + sizeof(struct ieee80211_csa_ie) /* CSA */ 2509178354Ssam + 2 + 1 /* ERP */ 2510178354Ssam + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2511178354Ssam + (vap->iv_caps & IEEE80211_C_WPA ? /* WPA 1+2 */ 2512178354Ssam 2*sizeof(struct ieee80211_ie_wpa) : 0) 2513178354Ssam /* XXX conditional? */ 2514178354Ssam + 4+2*sizeof(struct ieee80211_ie_htcap)/* HT caps */ 2515178354Ssam + 4+2*sizeof(struct ieee80211_ie_htinfo)/* HT info */ 2516178354Ssam + (vap->iv_caps & IEEE80211_C_WME ? /* WME */ 2517178354Ssam sizeof(struct ieee80211_wme_param) : 0) 2518190451Ssam#ifdef IEEE80211_SUPPORT_SUPERG 2519190451Ssam + sizeof(struct ieee80211_ath_ie) /* ATH */ 2520190451Ssam#endif 2521186904Ssam#ifdef IEEE80211_SUPPORT_TDMA 2522186904Ssam + (vap->iv_caps & IEEE80211_C_TDMA ? /* TDMA */ 2523186904Ssam sizeof(struct ieee80211_tdma_param) : 0) 2524186904Ssam#endif 2525178354Ssam + IEEE80211_MAX_APPIE 2526178354Ssam ; 2527178354Ssam m = ieee80211_getmgtframe(&frm, 2528178354Ssam ic->ic_headroom + sizeof(struct ieee80211_frame), pktlen); 2529178354Ssam if (m == NULL) { 2530178354Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY, 2531178354Ssam "%s: cannot get buf; size %u\n", __func__, pktlen); 2532178354Ssam vap->iv_stats.is_tx_nobuf++; 2533178354Ssam return NULL; 2534178354Ssam } 2535178354Ssam ieee80211_beacon_construct(m, frm, bo, ni); 2536178354Ssam 2537138568Ssam M_PREPEND(m, sizeof(struct ieee80211_frame), M_DONTWAIT); 2538138568Ssam KASSERT(m != NULL, ("no space for 802.11 header?")); 2539138568Ssam wh = mtod(m, struct ieee80211_frame *); 2540138568Ssam wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT | 2541138568Ssam IEEE80211_FC0_SUBTYPE_BEACON; 2542138568Ssam wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 2543170530Ssam *(uint16_t *)wh->i_dur = 0; 2544138568Ssam IEEE80211_ADDR_COPY(wh->i_addr1, ifp->if_broadcastaddr); 2545178354Ssam IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); 2546138568Ssam IEEE80211_ADDR_COPY(wh->i_addr3, ni->ni_bssid); 2547170530Ssam *(uint16_t *)wh->i_seq = 0; 2548138568Ssam 2549138568Ssam return m; 2550138568Ssam} 2551138568Ssam 2552138568Ssam/* 2553138568Ssam * Update the dynamic parts of a beacon frame based on the current state. 2554138568Ssam */ 2555138568Ssamint 2556172211Ssamieee80211_beacon_update(struct ieee80211_node *ni, 2557138568Ssam struct ieee80211_beacon_offsets *bo, struct mbuf *m, int mcast) 2558138568Ssam{ 2559178354Ssam struct ieee80211vap *vap = ni->ni_vap; 2560172211Ssam struct ieee80211com *ic = ni->ni_ic; 2561138568Ssam int len_changed = 0; 2562170530Ssam uint16_t capinfo; 2563138568Ssam 2564178354Ssam IEEE80211_LOCK(ic); 2565178354Ssam /* 2566178354Ssam * Handle 11h channel change when we've reached the count. 2567178354Ssam * We must recalculate the beacon frame contents to account 2568178354Ssam * for the new channel. Note we do this only for the first 2569178354Ssam * vap that reaches this point; subsequent vaps just update 2570178354Ssam * their beacon state to reflect the recalculated channel. 2571178354Ssam */ 2572178354Ssam if (isset(bo->bo_flags, IEEE80211_BEACON_CSA) && 2573178354Ssam vap->iv_csa_count == ic->ic_csa_count) { 2574178354Ssam vap->iv_csa_count = 0; 2575178354Ssam /* 2576178354Ssam * Effect channel change before reconstructing the beacon 2577178354Ssam * frame contents as many places reference ni_chan. 2578178354Ssam */ 2579178354Ssam if (ic->ic_csa_newchan != NULL) 2580178354Ssam ieee80211_csa_completeswitch(ic); 2581178354Ssam /* 2582178354Ssam * NB: ieee80211_beacon_construct clears all pending 2583178354Ssam * updates in bo_flags so we don't need to explicitly 2584178354Ssam * clear IEEE80211_BEACON_CSA. 2585178354Ssam */ 2586178354Ssam ieee80211_beacon_construct(m, 2587178354Ssam mtod(m, uint8_t*) + sizeof(struct ieee80211_frame), bo, ni); 2588178354Ssam 2589178354Ssam /* XXX do WME aggressive mode processing? */ 2590178354Ssam IEEE80211_UNLOCK(ic); 2591178354Ssam return 1; /* just assume length changed */ 2592178354Ssam } 2593178354Ssam 2594138568Ssam /* XXX faster to recalculate entirely or just changes? */ 2595178354Ssam capinfo = getcapinfo(vap, ni->ni_chan); 2596138568Ssam *bo->bo_caps = htole16(capinfo); 2597138568Ssam 2598178354Ssam if (vap->iv_flags & IEEE80211_F_WME) { 2599138568Ssam struct ieee80211_wme_state *wme = &ic->ic_wme; 2600138568Ssam 2601138568Ssam /* 2602138568Ssam * Check for agressive mode change. When there is 2603138568Ssam * significant high priority traffic in the BSS 2604138568Ssam * throttle back BE traffic by using conservative 2605138568Ssam * parameters. Otherwise BE uses agressive params 2606138568Ssam * to optimize performance of legacy/non-QoS traffic. 2607138568Ssam */ 2608138568Ssam if (wme->wme_flags & WME_F_AGGRMODE) { 2609138568Ssam if (wme->wme_hipri_traffic > 2610138568Ssam wme->wme_hipri_switch_thresh) { 2611178354Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 2612138568Ssam "%s: traffic %u, disable aggressive mode\n", 2613138568Ssam __func__, wme->wme_hipri_traffic); 2614138568Ssam wme->wme_flags &= ~WME_F_AGGRMODE; 2615178354Ssam ieee80211_wme_updateparams_locked(vap); 2616138568Ssam wme->wme_hipri_traffic = 2617138568Ssam wme->wme_hipri_switch_hysteresis; 2618138568Ssam } else 2619138568Ssam wme->wme_hipri_traffic = 0; 2620138568Ssam } else { 2621138568Ssam if (wme->wme_hipri_traffic <= 2622138568Ssam wme->wme_hipri_switch_thresh) { 2623178354Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 2624138568Ssam "%s: traffic %u, enable aggressive mode\n", 2625138568Ssam __func__, wme->wme_hipri_traffic); 2626138568Ssam wme->wme_flags |= WME_F_AGGRMODE; 2627178354Ssam ieee80211_wme_updateparams_locked(vap); 2628138568Ssam wme->wme_hipri_traffic = 0; 2629138568Ssam } else 2630138568Ssam wme->wme_hipri_traffic = 2631138568Ssam wme->wme_hipri_switch_hysteresis; 2632138568Ssam } 2633172211Ssam if (isset(bo->bo_flags, IEEE80211_BEACON_WME)) { 2634138568Ssam (void) ieee80211_add_wme_param(bo->bo_wme, wme); 2635172211Ssam clrbit(bo->bo_flags, IEEE80211_BEACON_WME); 2636138568Ssam } 2637138568Ssam } 2638138568Ssam 2639178354Ssam if (isset(bo->bo_flags, IEEE80211_BEACON_HTINFO)) { 2640178354Ssam ieee80211_ht_update_beacon(vap, bo); 2641172211Ssam clrbit(bo->bo_flags, IEEE80211_BEACON_HTINFO); 2642170530Ssam } 2643186904Ssam#ifdef IEEE80211_SUPPORT_TDMA 2644186904Ssam if (vap->iv_caps & IEEE80211_C_TDMA) { 2645186904Ssam /* 2646186904Ssam * NB: the beacon is potentially updated every TBTT. 2647186904Ssam */ 2648186904Ssam ieee80211_tdma_update_beacon(vap, bo); 2649186904Ssam } 2650186904Ssam#endif 2651178354Ssam if (vap->iv_opmode == IEEE80211_M_HOSTAP) { /* NB: no IBSS support*/ 2652138568Ssam struct ieee80211_tim_ie *tie = 2653138568Ssam (struct ieee80211_tim_ie *) bo->bo_tim; 2654172211Ssam if (isset(bo->bo_flags, IEEE80211_BEACON_TIM)) { 2655138568Ssam u_int timlen, timoff, i; 2656138568Ssam /* 2657138568Ssam * ATIM/DTIM needs updating. If it fits in the 2658138568Ssam * current space allocated then just copy in the 2659138568Ssam * new bits. Otherwise we need to move any trailing 2660138568Ssam * data to make room. Note that we know there is 2661138568Ssam * contiguous space because ieee80211_beacon_allocate 2662138568Ssam * insures there is space in the mbuf to write a 2663178354Ssam * maximal-size virtual bitmap (based on iv_max_aid). 2664138568Ssam */ 2665138568Ssam /* 2666138568Ssam * Calculate the bitmap size and offset, copy any 2667138568Ssam * trailer out of the way, and then copy in the 2668138568Ssam * new bitmap and update the information element. 2669138568Ssam * Note that the tim bitmap must contain at least 2670138568Ssam * one byte and any offset must be even. 2671138568Ssam */ 2672178354Ssam if (vap->iv_ps_pending != 0) { 2673138568Ssam timoff = 128; /* impossibly large */ 2674178354Ssam for (i = 0; i < vap->iv_tim_len; i++) 2675178354Ssam if (vap->iv_tim_bitmap[i]) { 2676138568Ssam timoff = i &~ 1; 2677138568Ssam break; 2678138568Ssam } 2679138568Ssam KASSERT(timoff != 128, ("tim bitmap empty!")); 2680178354Ssam for (i = vap->iv_tim_len-1; i >= timoff; i--) 2681178354Ssam if (vap->iv_tim_bitmap[i]) 2682138568Ssam break; 2683138568Ssam timlen = 1 + (i - timoff); 2684138568Ssam } else { 2685138568Ssam timoff = 0; 2686138568Ssam timlen = 1; 2687138568Ssam } 2688138568Ssam if (timlen != bo->bo_tim_len) { 2689138568Ssam /* copy up/down trailer */ 2690153973Ssam int adjust = tie->tim_bitmap+timlen 2691172211Ssam - bo->bo_tim_trailer; 2692172211Ssam ovbcopy(bo->bo_tim_trailer, 2693172211Ssam bo->bo_tim_trailer+adjust, 2694172211Ssam bo->bo_tim_trailer_len); 2695172211Ssam bo->bo_tim_trailer += adjust; 2696153973Ssam bo->bo_erp += adjust; 2697170530Ssam bo->bo_htinfo += adjust; 2698190451Ssam#ifdef IEEE80211_SUPERG_SUPPORT 2699190451Ssam bo->bo_ath += adjust; 2700190451Ssam#endif 2701190448Ssam#ifdef IEEE80211_TDMA_SUPPORT 2702190448Ssam bo->bo_tdma += adjust; 2703190448Ssam#endif 2704178354Ssam bo->bo_appie += adjust; 2705178354Ssam bo->bo_wme += adjust; 2706178354Ssam bo->bo_csa += adjust; 2707138568Ssam bo->bo_tim_len = timlen; 2708138568Ssam 2709138568Ssam /* update information element */ 2710138568Ssam tie->tim_len = 3 + timlen; 2711138568Ssam tie->tim_bitctl = timoff; 2712138568Ssam len_changed = 1; 2713138568Ssam } 2714178354Ssam memcpy(tie->tim_bitmap, vap->iv_tim_bitmap + timoff, 2715138568Ssam bo->bo_tim_len); 2716138568Ssam 2717172211Ssam clrbit(bo->bo_flags, IEEE80211_BEACON_TIM); 2718138568Ssam 2719178354Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_POWER, 2720138568Ssam "%s: TIM updated, pending %u, off %u, len %u\n", 2721178354Ssam __func__, vap->iv_ps_pending, timoff, timlen); 2722138568Ssam } 2723138568Ssam /* count down DTIM period */ 2724138568Ssam if (tie->tim_count == 0) 2725138568Ssam tie->tim_count = tie->tim_period - 1; 2726138568Ssam else 2727138568Ssam tie->tim_count--; 2728138568Ssam /* update state for buffered multicast frames on DTIM */ 2729153139Ssam if (mcast && tie->tim_count == 0) 2730138568Ssam tie->tim_bitctl |= 1; 2731138568Ssam else 2732138568Ssam tie->tim_bitctl &= ~1; 2733178354Ssam if (isset(bo->bo_flags, IEEE80211_BEACON_CSA)) { 2734178354Ssam struct ieee80211_csa_ie *csa = 2735178354Ssam (struct ieee80211_csa_ie *) bo->bo_csa; 2736178354Ssam 2737178354Ssam /* 2738178354Ssam * Insert or update CSA ie. If we're just starting 2739178354Ssam * to count down to the channel switch then we need 2740178354Ssam * to insert the CSA ie. Otherwise we just need to 2741178354Ssam * drop the count. The actual change happens above 2742178354Ssam * when the vap's count reaches the target count. 2743178354Ssam */ 2744178354Ssam if (vap->iv_csa_count == 0) { 2745178354Ssam memmove(&csa[1], csa, bo->bo_csa_trailer_len); 2746178354Ssam bo->bo_erp += sizeof(*csa); 2747190449Ssam bo->bo_htinfo += sizeof(*csa); 2748178354Ssam bo->bo_wme += sizeof(*csa); 2749190451Ssam#ifdef IEEE80211_SUPERG_SUPPORT 2750190451Ssam bo->bo_ath += sizeof(*csa); 2751190451Ssam#endif 2752190448Ssam#ifdef IEEE80211_TDMA_SUPPORT 2753190448Ssam bo->bo_tdma += sizeof(*csa); 2754190448Ssam#endif 2755178354Ssam bo->bo_appie += sizeof(*csa); 2756178354Ssam bo->bo_csa_trailer_len += sizeof(*csa); 2757178354Ssam bo->bo_tim_trailer_len += sizeof(*csa); 2758178354Ssam m->m_len += sizeof(*csa); 2759178354Ssam m->m_pkthdr.len += sizeof(*csa); 2760178354Ssam 2761178354Ssam ieee80211_add_csa(bo->bo_csa, vap); 2762178354Ssam } else 2763178354Ssam csa->csa_count--; 2764178354Ssam vap->iv_csa_count++; 2765178354Ssam /* NB: don't clear IEEE80211_BEACON_CSA */ 2766178354Ssam } 2767172211Ssam if (isset(bo->bo_flags, IEEE80211_BEACON_ERP)) { 2768153973Ssam /* 2769153973Ssam * ERP element needs updating. 2770153973Ssam */ 2771153973Ssam (void) ieee80211_add_erp(bo->bo_erp, ic); 2772172211Ssam clrbit(bo->bo_flags, IEEE80211_BEACON_ERP); 2773153973Ssam } 2774190451Ssam#ifdef IEEE80211_SUPPORT_SUPERG 2775190451Ssam if (isset(bo->bo_flags, IEEE80211_BEACON_ATH)) { 2776190451Ssam ieee80211_add_athcaps(bo->bo_ath, ni); 2777190451Ssam clrbit(bo->bo_flags, IEEE80211_BEACON_ATH); 2778190451Ssam } 2779190451Ssam#endif 2780138568Ssam } 2781178354Ssam if (isset(bo->bo_flags, IEEE80211_BEACON_APPIE)) { 2782178354Ssam const struct ieee80211_appie *aie = vap->iv_appie_beacon; 2783178354Ssam int aielen; 2784178354Ssam uint8_t *frm; 2785138568Ssam 2786178354Ssam aielen = 0; 2787178354Ssam if (aie != NULL) 2788178354Ssam aielen += aie->ie_len; 2789178354Ssam if (aielen != bo->bo_appie_len) { 2790178354Ssam /* copy up/down trailer */ 2791178354Ssam int adjust = aielen - bo->bo_appie_len; 2792178354Ssam ovbcopy(bo->bo_tim_trailer, bo->bo_tim_trailer+adjust, 2793178354Ssam bo->bo_tim_trailer_len); 2794178354Ssam bo->bo_tim_trailer += adjust; 2795178354Ssam bo->bo_appie += adjust; 2796178354Ssam bo->bo_appie_len = aielen; 2797178354Ssam 2798178354Ssam len_changed = 1; 2799178354Ssam } 2800178354Ssam frm = bo->bo_appie; 2801178354Ssam if (aie != NULL) 2802178354Ssam frm = add_appie(frm, aie); 2803178354Ssam clrbit(bo->bo_flags, IEEE80211_BEACON_APPIE); 2804178354Ssam } 2805178354Ssam IEEE80211_UNLOCK(ic); 2806178354Ssam 2807138568Ssam return len_changed; 2808138568Ssam} 2809