ieee80211_output.c revision 253007
1/*- 2 * Copyright (c) 2001 Atsushi Onoe 3 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD: head/sys/net80211/ieee80211_output.c 253007 2013-07-07 21:39:37Z alfred $"); 29 30#include "opt_inet.h" 31#include "opt_inet6.h" 32#include "opt_wlan.h" 33 34#include <sys/param.h> 35#include <sys/systm.h> 36#include <sys/mbuf.h> 37#include <sys/kernel.h> 38#include <sys/endian.h> 39 40#include <sys/socket.h> 41 42#include <net/bpf.h> 43#include <net/ethernet.h> 44#include <net/if.h> 45#include <net/if_llc.h> 46#include <net/if_media.h> 47#include <net/if_vlan_var.h> 48 49#include <net80211/ieee80211_var.h> 50#include <net80211/ieee80211_regdomain.h> 51#ifdef IEEE80211_SUPPORT_SUPERG 52#include <net80211/ieee80211_superg.h> 53#endif 54#ifdef IEEE80211_SUPPORT_TDMA 55#include <net80211/ieee80211_tdma.h> 56#endif 57#include <net80211/ieee80211_wds.h> 58#include <net80211/ieee80211_mesh.h> 59 60#if defined(INET) || defined(INET6) 61#include <netinet/in.h> 62#endif 63 64#ifdef INET 65#include <netinet/if_ether.h> 66#include <netinet/in_systm.h> 67#include <netinet/ip.h> 68#endif 69#ifdef INET6 70#include <netinet/ip6.h> 71#endif 72 73#include <security/mac/mac_framework.h> 74 75#define ETHER_HEADER_COPY(dst, src) \ 76 memcpy(dst, src, sizeof(struct ether_header)) 77 78/* unalligned little endian access */ 79#define LE_WRITE_2(p, v) do { \ 80 ((uint8_t *)(p))[0] = (v) & 0xff; \ 81 ((uint8_t *)(p))[1] = ((v) >> 8) & 0xff; \ 82} while (0) 83#define LE_WRITE_4(p, v) do { \ 84 ((uint8_t *)(p))[0] = (v) & 0xff; \ 85 ((uint8_t *)(p))[1] = ((v) >> 8) & 0xff; \ 86 ((uint8_t *)(p))[2] = ((v) >> 16) & 0xff; \ 87 ((uint8_t *)(p))[3] = ((v) >> 24) & 0xff; \ 88} while (0) 89 90static int ieee80211_fragment(struct ieee80211vap *, struct mbuf *, 91 u_int hdrsize, u_int ciphdrsize, u_int mtu); 92static void ieee80211_tx_mgt_cb(struct ieee80211_node *, void *, int); 93 94#ifdef IEEE80211_DEBUG 95/* 96 * Decide if an outbound management frame should be 97 * printed when debugging is enabled. This filters some 98 * of the less interesting frames that come frequently 99 * (e.g. beacons). 100 */ 101static __inline int 102doprint(struct ieee80211vap *vap, int subtype) 103{ 104 switch (subtype) { 105 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 106 return (vap->iv_opmode == IEEE80211_M_IBSS); 107 } 108 return 1; 109} 110#endif 111 112/* 113 * Send the given mbuf through the given vap. 114 * 115 * This consumes the mbuf regardless of whether the transmit 116 * was successful or not. 117 * 118 * This does none of the initial checks that ieee80211_start() 119 * does (eg CAC timeout, interface wakeup) - the caller must 120 * do this first. 121 */ 122static int 123ieee80211_start_pkt(struct ieee80211vap *vap, struct mbuf *m) 124{ 125#define IS_DWDS(vap) \ 126 (vap->iv_opmode == IEEE80211_M_WDS && \ 127 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) == 0) 128 struct ieee80211com *ic = vap->iv_ic; 129 struct ifnet *ifp = vap->iv_ifp; 130 struct ieee80211_node *ni; 131 struct ether_header *eh; 132 int error; 133 134 /* 135 * Cancel any background scan. 136 */ 137 if (ic->ic_flags & IEEE80211_F_SCAN) 138 ieee80211_cancel_anyscan(vap); 139 /* 140 * Find the node for the destination so we can do 141 * things like power save and fast frames aggregation. 142 * 143 * NB: past this point various code assumes the first 144 * mbuf has the 802.3 header present (and contiguous). 145 */ 146 ni = NULL; 147 if (m->m_len < sizeof(struct ether_header) && 148 (m = m_pullup(m, sizeof(struct ether_header))) == NULL) { 149 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 150 "discard frame, %s\n", "m_pullup failed"); 151 vap->iv_stats.is_tx_nobuf++; /* XXX */ 152 ifp->if_oerrors++; 153 return (ENOBUFS); 154 } 155 eh = mtod(m, struct ether_header *); 156 if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 157 if (IS_DWDS(vap)) { 158 /* 159 * Only unicast frames from the above go out 160 * DWDS vaps; multicast frames are handled by 161 * dispatching the frame as it comes through 162 * the AP vap (see below). 163 */ 164 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_WDS, 165 eh->ether_dhost, "mcast", "%s", "on DWDS"); 166 vap->iv_stats.is_dwds_mcast++; 167 m_freem(m); 168 /* XXX better status? */ 169 return (ENOBUFS); 170 } 171 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 172 /* 173 * Spam DWDS vap's w/ multicast traffic. 174 */ 175 /* XXX only if dwds in use? */ 176 ieee80211_dwds_mcast(vap, m); 177 } 178 } 179#ifdef IEEE80211_SUPPORT_MESH 180 if (vap->iv_opmode != IEEE80211_M_MBSS) { 181#endif 182 ni = ieee80211_find_txnode(vap, eh->ether_dhost); 183 if (ni == NULL) { 184 /* NB: ieee80211_find_txnode does stat+msg */ 185 ifp->if_oerrors++; 186 m_freem(m); 187 /* XXX better status? */ 188 return (ENOBUFS); 189 } 190 if (ni->ni_associd == 0 && 191 (ni->ni_flags & IEEE80211_NODE_ASSOCID)) { 192 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_OUTPUT, 193 eh->ether_dhost, NULL, 194 "sta not associated (type 0x%04x)", 195 htons(eh->ether_type)); 196 vap->iv_stats.is_tx_notassoc++; 197 ifp->if_oerrors++; 198 m_freem(m); 199 ieee80211_free_node(ni); 200 /* XXX better status? */ 201 return (ENOBUFS); 202 } 203#ifdef IEEE80211_SUPPORT_MESH 204 } else { 205 if (!IEEE80211_ADDR_EQ(eh->ether_shost, vap->iv_myaddr)) { 206 /* 207 * Proxy station only if configured. 208 */ 209 if (!ieee80211_mesh_isproxyena(vap)) { 210 IEEE80211_DISCARD_MAC(vap, 211 IEEE80211_MSG_OUTPUT | 212 IEEE80211_MSG_MESH, 213 eh->ether_dhost, NULL, 214 "%s", "proxy not enabled"); 215 vap->iv_stats.is_mesh_notproxy++; 216 ifp->if_oerrors++; 217 m_freem(m); 218 /* XXX better status? */ 219 return (ENOBUFS); 220 } 221 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 222 "forward frame from DS SA(%6D), DA(%6D)\n", 223 eh->ether_shost, ":", 224 eh->ether_dhost, ":"); 225 ieee80211_mesh_proxy_check(vap, eh->ether_shost); 226 } 227 ni = ieee80211_mesh_discover(vap, eh->ether_dhost, m); 228 if (ni == NULL) { 229 /* 230 * NB: ieee80211_mesh_discover holds/disposes 231 * frame (e.g. queueing on path discovery). 232 */ 233 ifp->if_oerrors++; 234 /* XXX better status? */ 235 return (ENOBUFS); 236 } 237 } 238#endif 239 if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) && 240 (m->m_flags & M_PWR_SAV) == 0) { 241 /* 242 * Station in power save mode; pass the frame 243 * to the 802.11 layer and continue. We'll get 244 * the frame back when the time is right. 245 * XXX lose WDS vap linkage? 246 */ 247 (void) ieee80211_pwrsave(ni, m); 248 ieee80211_free_node(ni); 249 /* XXX better status? */ 250 return (ENOBUFS); 251 } 252 /* calculate priority so drivers can find the tx queue */ 253 if (ieee80211_classify(ni, m)) { 254 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_OUTPUT, 255 eh->ether_dhost, NULL, 256 "%s", "classification failure"); 257 vap->iv_stats.is_tx_classify++; 258 ifp->if_oerrors++; 259 m_freem(m); 260 ieee80211_free_node(ni); 261 /* XXX better status? */ 262 return (ENOBUFS); 263 } 264 /* 265 * Stash the node pointer. Note that we do this after 266 * any call to ieee80211_dwds_mcast because that code 267 * uses any existing value for rcvif to identify the 268 * interface it (might have been) received on. 269 */ 270 m->m_pkthdr.rcvif = (void *)ni; 271 272 BPF_MTAP(ifp, m); /* 802.3 tx */ 273 274 275 /* 276 * Check if A-MPDU tx aggregation is setup or if we 277 * should try to enable it. The sta must be associated 278 * with HT and A-MPDU enabled for use. When the policy 279 * routine decides we should enable A-MPDU we issue an 280 * ADDBA request and wait for a reply. The frame being 281 * encapsulated will go out w/o using A-MPDU, or possibly 282 * it might be collected by the driver and held/retransmit. 283 * The default ic_ampdu_enable routine handles staggering 284 * ADDBA requests in case the receiver NAK's us or we are 285 * otherwise unable to establish a BA stream. 286 */ 287 if ((ni->ni_flags & IEEE80211_NODE_AMPDU_TX) && 288 (vap->iv_flags_ht & IEEE80211_FHT_AMPDU_TX) && 289 (m->m_flags & M_EAPOL) == 0) { 290 int tid = WME_AC_TO_TID(M_WME_GETAC(m)); 291 struct ieee80211_tx_ampdu *tap = &ni->ni_tx_ampdu[tid]; 292 293 ieee80211_txampdu_count_packet(tap); 294 if (IEEE80211_AMPDU_RUNNING(tap)) { 295 /* 296 * Operational, mark frame for aggregation. 297 * 298 * XXX do tx aggregation here 299 */ 300 m->m_flags |= M_AMPDU_MPDU; 301 } else if (!IEEE80211_AMPDU_REQUESTED(tap) && 302 ic->ic_ampdu_enable(ni, tap)) { 303 /* 304 * Not negotiated yet, request service. 305 */ 306 ieee80211_ampdu_request(ni, tap); 307 /* XXX hold frame for reply? */ 308 } 309 } 310 311#ifdef IEEE80211_SUPPORT_SUPERG 312 else if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF)) { 313 m = ieee80211_ff_check(ni, m); 314 if (m == NULL) { 315 /* NB: any ni ref held on stageq */ 316 /* XXX better status? */ 317 return (ENOBUFS); 318 } 319 } 320#endif /* IEEE80211_SUPPORT_SUPERG */ 321 322 /* 323 * Grab the TX lock - serialise the TX process from this 324 * point (where TX state is being checked/modified) 325 * through to driver queue. 326 */ 327 IEEE80211_TX_LOCK(ic); 328 329 if (__predict_true((vap->iv_caps & IEEE80211_C_8023ENCAP) == 0)) { 330 /* 331 * Encapsulate the packet in prep for transmission. 332 */ 333 m = ieee80211_encap(vap, ni, m); 334 if (m == NULL) { 335 /* NB: stat+msg handled in ieee80211_encap */ 336 IEEE80211_TX_UNLOCK(ic); 337 ieee80211_free_node(ni); 338 /* XXX better status? */ 339 return (ENOBUFS); 340 } 341 } 342 error = ieee80211_parent_transmit(ic, m); 343 344 /* 345 * Unlock at this point - no need to hold it across 346 * ieee80211_free_node() (ie, the comlock) 347 */ 348 IEEE80211_TX_UNLOCK(ic); 349 if (error != 0) { 350 /* NB: IFQ_HANDOFF reclaims mbuf */ 351 ieee80211_free_node(ni); 352 } else { 353 ifp->if_opackets++; 354 } 355 ic->ic_lastdata = ticks; 356 357 return (0); 358#undef IS_DWDS 359} 360 361/* 362 * Start method for vap's. All packets from the stack come 363 * through here. We handle common processing of the packets 364 * before dispatching them to the underlying device. 365 */ 366void 367ieee80211_start(struct ifnet *ifp) 368{ 369 struct ieee80211vap *vap = ifp->if_softc; 370 struct ieee80211com *ic = vap->iv_ic; 371 struct ifnet *parent = ic->ic_ifp; 372 struct mbuf *m; 373 374 /* NB: parent must be up and running */ 375 if (!IFNET_IS_UP_RUNNING(parent)) { 376 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 377 "%s: ignore queue, parent %s not up+running\n", 378 __func__, parent->if_xname); 379 /* XXX stat */ 380 return; 381 } 382 if (vap->iv_state == IEEE80211_S_SLEEP) { 383 /* 384 * In power save, wakeup device for transmit. 385 */ 386 ieee80211_new_state(vap, IEEE80211_S_RUN, 0); 387 return; 388 } 389 /* 390 * No data frames go out unless we're running. 391 * Note in particular this covers CAC and CSA 392 * states (though maybe we should check muting 393 * for CSA). 394 */ 395 if (vap->iv_state != IEEE80211_S_RUN) { 396 IEEE80211_LOCK(ic); 397 /* re-check under the com lock to avoid races */ 398 if (vap->iv_state != IEEE80211_S_RUN) { 399 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 400 "%s: ignore queue, in %s state\n", 401 __func__, ieee80211_state_name[vap->iv_state]); 402 vap->iv_stats.is_tx_badstate++; 403 IEEE80211_UNLOCK(ic); 404 IFQ_LOCK(&ifp->if_snd); 405 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 406 IFQ_UNLOCK(&ifp->if_snd); 407 return; 408 } 409 IEEE80211_UNLOCK(ic); 410 } 411 412 for (;;) { 413 IFQ_DEQUEUE(&ifp->if_snd, m); 414 if (m == NULL) 415 break; 416 /* 417 * Sanitize mbuf flags for net80211 use. We cannot 418 * clear M_PWR_SAV or M_MORE_DATA because these may 419 * be set for frames that are re-submitted from the 420 * power save queue. 421 * 422 * NB: This must be done before ieee80211_classify as 423 * it marks EAPOL in frames with M_EAPOL. 424 */ 425 m->m_flags &= ~(M_80211_TX - M_PWR_SAV - M_MORE_DATA); 426 /* 427 * Bump to the packet transmission path. 428 */ 429 (void) ieee80211_start_pkt(vap, m); 430 /* mbuf is consumed here */ 431 } 432} 433 434/* 435 * 802.11 raw output routine. 436 */ 437int 438ieee80211_raw_output(struct ieee80211vap *vap, struct ieee80211_node *ni, 439 struct mbuf *m, const struct ieee80211_bpf_params *params) 440{ 441 struct ieee80211com *ic = vap->iv_ic; 442 443 return (ic->ic_raw_xmit(ni, m, params)); 444} 445 446/* 447 * 802.11 output routine. This is (currently) used only to 448 * connect bpf write calls to the 802.11 layer for injecting 449 * raw 802.11 frames. 450 */ 451int 452ieee80211_output(struct ifnet *ifp, struct mbuf *m, 453 const struct sockaddr *dst, struct route *ro) 454{ 455#define senderr(e) do { error = (e); goto bad;} while (0) 456 struct ieee80211_node *ni = NULL; 457 struct ieee80211vap *vap; 458 struct ieee80211_frame *wh; 459 struct ieee80211com *ic = NULL; 460 int error; 461 int ret; 462 463 IFQ_LOCK(&ifp->if_snd); 464 if (ifp->if_drv_flags & IFF_DRV_OACTIVE) { 465 IFQ_UNLOCK(&ifp->if_snd); 466 /* 467 * Short-circuit requests if the vap is marked OACTIVE 468 * as this can happen because a packet came down through 469 * ieee80211_start before the vap entered RUN state in 470 * which case it's ok to just drop the frame. This 471 * should not be necessary but callers of if_output don't 472 * check OACTIVE. 473 */ 474 senderr(ENETDOWN); 475 } 476 IFQ_UNLOCK(&ifp->if_snd); 477 vap = ifp->if_softc; 478 ic = vap->iv_ic; 479 /* 480 * Hand to the 802.3 code if not tagged as 481 * a raw 802.11 frame. 482 */ 483 if (dst->sa_family != AF_IEEE80211) 484 return vap->iv_output(ifp, m, dst, ro); 485#ifdef MAC 486 error = mac_ifnet_check_transmit(ifp, m); 487 if (error) 488 senderr(error); 489#endif 490 if (ifp->if_flags & IFF_MONITOR) 491 senderr(ENETDOWN); 492 if (!IFNET_IS_UP_RUNNING(ifp)) 493 senderr(ENETDOWN); 494 if (vap->iv_state == IEEE80211_S_CAC) { 495 IEEE80211_DPRINTF(vap, 496 IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH, 497 "block %s frame in CAC state\n", "raw data"); 498 vap->iv_stats.is_tx_badstate++; 499 senderr(EIO); /* XXX */ 500 } else if (vap->iv_state == IEEE80211_S_SCAN) 501 senderr(EIO); 502 /* XXX bypass bridge, pfil, carp, etc. */ 503 504 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_ack)) 505 senderr(EIO); /* XXX */ 506 wh = mtod(m, struct ieee80211_frame *); 507 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 508 IEEE80211_FC0_VERSION_0) 509 senderr(EIO); /* XXX */ 510 511 /* locate destination node */ 512 switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) { 513 case IEEE80211_FC1_DIR_NODS: 514 case IEEE80211_FC1_DIR_FROMDS: 515 ni = ieee80211_find_txnode(vap, wh->i_addr1); 516 break; 517 case IEEE80211_FC1_DIR_TODS: 518 case IEEE80211_FC1_DIR_DSTODS: 519 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) 520 senderr(EIO); /* XXX */ 521 ni = ieee80211_find_txnode(vap, wh->i_addr3); 522 break; 523 default: 524 senderr(EIO); /* XXX */ 525 } 526 if (ni == NULL) { 527 /* 528 * Permit packets w/ bpf params through regardless 529 * (see below about sa_len). 530 */ 531 if (dst->sa_len == 0) 532 senderr(EHOSTUNREACH); 533 ni = ieee80211_ref_node(vap->iv_bss); 534 } 535 536 /* 537 * Sanitize mbuf for net80211 flags leaked from above. 538 * 539 * NB: This must be done before ieee80211_classify as 540 * it marks EAPOL in frames with M_EAPOL. 541 */ 542 m->m_flags &= ~M_80211_TX; 543 544 /* calculate priority so drivers can find the tx queue */ 545 /* XXX assumes an 802.3 frame */ 546 if (ieee80211_classify(ni, m)) 547 senderr(EIO); /* XXX */ 548 549 ifp->if_opackets++; 550 IEEE80211_NODE_STAT(ni, tx_data); 551 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 552 IEEE80211_NODE_STAT(ni, tx_mcast); 553 m->m_flags |= M_MCAST; 554 } else 555 IEEE80211_NODE_STAT(ni, tx_ucast); 556 /* NB: ieee80211_encap does not include 802.11 header */ 557 IEEE80211_NODE_STAT_ADD(ni, tx_bytes, m->m_pkthdr.len); 558 559 IEEE80211_TX_LOCK(ic); 560 561 /* 562 * NB: DLT_IEEE802_11_RADIO identifies the parameters are 563 * present by setting the sa_len field of the sockaddr (yes, 564 * this is a hack). 565 * NB: we assume sa_data is suitably aligned to cast. 566 */ 567 ret = ieee80211_raw_output(vap, ni, m, 568 (const struct ieee80211_bpf_params *)(dst->sa_len ? 569 dst->sa_data : NULL)); 570 IEEE80211_TX_UNLOCK(ic); 571 return (ret); 572bad: 573 if (m != NULL) 574 m_freem(m); 575 if (ni != NULL) 576 ieee80211_free_node(ni); 577 ifp->if_oerrors++; 578 return error; 579#undef senderr 580} 581 582/* 583 * Set the direction field and address fields of an outgoing 584 * frame. Note this should be called early on in constructing 585 * a frame as it sets i_fc[1]; other bits can then be or'd in. 586 */ 587void 588ieee80211_send_setup( 589 struct ieee80211_node *ni, 590 struct mbuf *m, 591 int type, int tid, 592 const uint8_t sa[IEEE80211_ADDR_LEN], 593 const uint8_t da[IEEE80211_ADDR_LEN], 594 const uint8_t bssid[IEEE80211_ADDR_LEN]) 595{ 596#define WH4(wh) ((struct ieee80211_frame_addr4 *)wh) 597 struct ieee80211vap *vap = ni->ni_vap; 598 struct ieee80211_tx_ampdu *tap; 599 struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *); 600 ieee80211_seq seqno; 601 602 IEEE80211_TX_LOCK_ASSERT(ni->ni_ic); 603 604 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | type; 605 if ((type & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_DATA) { 606 switch (vap->iv_opmode) { 607 case IEEE80211_M_STA: 608 wh->i_fc[1] = IEEE80211_FC1_DIR_TODS; 609 IEEE80211_ADDR_COPY(wh->i_addr1, bssid); 610 IEEE80211_ADDR_COPY(wh->i_addr2, sa); 611 IEEE80211_ADDR_COPY(wh->i_addr3, da); 612 break; 613 case IEEE80211_M_IBSS: 614 case IEEE80211_M_AHDEMO: 615 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 616 IEEE80211_ADDR_COPY(wh->i_addr1, da); 617 IEEE80211_ADDR_COPY(wh->i_addr2, sa); 618 IEEE80211_ADDR_COPY(wh->i_addr3, bssid); 619 break; 620 case IEEE80211_M_HOSTAP: 621 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS; 622 IEEE80211_ADDR_COPY(wh->i_addr1, da); 623 IEEE80211_ADDR_COPY(wh->i_addr2, bssid); 624 IEEE80211_ADDR_COPY(wh->i_addr3, sa); 625 break; 626 case IEEE80211_M_WDS: 627 wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS; 628 IEEE80211_ADDR_COPY(wh->i_addr1, da); 629 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); 630 IEEE80211_ADDR_COPY(wh->i_addr3, da); 631 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, sa); 632 break; 633 case IEEE80211_M_MBSS: 634#ifdef IEEE80211_SUPPORT_MESH 635 if (IEEE80211_IS_MULTICAST(da)) { 636 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS; 637 /* XXX next hop */ 638 IEEE80211_ADDR_COPY(wh->i_addr1, da); 639 IEEE80211_ADDR_COPY(wh->i_addr2, 640 vap->iv_myaddr); 641 } else { 642 wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS; 643 IEEE80211_ADDR_COPY(wh->i_addr1, da); 644 IEEE80211_ADDR_COPY(wh->i_addr2, 645 vap->iv_myaddr); 646 IEEE80211_ADDR_COPY(wh->i_addr3, da); 647 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, sa); 648 } 649#endif 650 break; 651 case IEEE80211_M_MONITOR: /* NB: to quiet compiler */ 652 break; 653 } 654 } else { 655 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 656 IEEE80211_ADDR_COPY(wh->i_addr1, da); 657 IEEE80211_ADDR_COPY(wh->i_addr2, sa); 658#ifdef IEEE80211_SUPPORT_MESH 659 if (vap->iv_opmode == IEEE80211_M_MBSS) 660 IEEE80211_ADDR_COPY(wh->i_addr3, sa); 661 else 662#endif 663 IEEE80211_ADDR_COPY(wh->i_addr3, bssid); 664 } 665 *(uint16_t *)&wh->i_dur[0] = 0; 666 667 tap = &ni->ni_tx_ampdu[tid]; 668 if (tid != IEEE80211_NONQOS_TID && IEEE80211_AMPDU_RUNNING(tap)) 669 m->m_flags |= M_AMPDU_MPDU; 670 else { 671 seqno = ni->ni_txseqs[tid]++; 672 *(uint16_t *)&wh->i_seq[0] = 673 htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); 674 M_SEQNO_SET(m, seqno); 675 } 676 677 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) 678 m->m_flags |= M_MCAST; 679#undef WH4 680} 681 682/* 683 * Send a management frame to the specified node. The node pointer 684 * must have a reference as the pointer will be passed to the driver 685 * and potentially held for a long time. If the frame is successfully 686 * dispatched to the driver, then it is responsible for freeing the 687 * reference (and potentially free'ing up any associated storage); 688 * otherwise deal with reclaiming any reference (on error). 689 */ 690int 691ieee80211_mgmt_output(struct ieee80211_node *ni, struct mbuf *m, int type, 692 struct ieee80211_bpf_params *params) 693{ 694 struct ieee80211vap *vap = ni->ni_vap; 695 struct ieee80211com *ic = ni->ni_ic; 696 struct ieee80211_frame *wh; 697 int ret; 698 699 KASSERT(ni != NULL, ("null node")); 700 701 if (vap->iv_state == IEEE80211_S_CAC) { 702 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH, 703 ni, "block %s frame in CAC state", 704 ieee80211_mgt_subtype_name[ 705 (type & IEEE80211_FC0_SUBTYPE_MASK) >> 706 IEEE80211_FC0_SUBTYPE_SHIFT]); 707 vap->iv_stats.is_tx_badstate++; 708 ieee80211_free_node(ni); 709 m_freem(m); 710 return EIO; /* XXX */ 711 } 712 713 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); 714 if (m == NULL) { 715 ieee80211_free_node(ni); 716 return ENOMEM; 717 } 718 719 IEEE80211_TX_LOCK(ic); 720 721 wh = mtod(m, struct ieee80211_frame *); 722 ieee80211_send_setup(ni, m, 723 IEEE80211_FC0_TYPE_MGT | type, IEEE80211_NONQOS_TID, 724 vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid); 725 if (params->ibp_flags & IEEE80211_BPF_CRYPTO) { 726 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr1, 727 "encrypting frame (%s)", __func__); 728 wh->i_fc[1] |= IEEE80211_FC1_WEP; 729 } 730 m->m_flags |= M_ENCAP; /* mark encapsulated */ 731 732 KASSERT(type != IEEE80211_FC0_SUBTYPE_PROBE_RESP, ("probe response?")); 733 M_WME_SETAC(m, params->ibp_pri); 734 735#ifdef IEEE80211_DEBUG 736 /* avoid printing too many frames */ 737 if ((ieee80211_msg_debug(vap) && doprint(vap, type)) || 738 ieee80211_msg_dumppkts(vap)) { 739 printf("[%s] send %s on channel %u\n", 740 ether_sprintf(wh->i_addr1), 741 ieee80211_mgt_subtype_name[ 742 (type & IEEE80211_FC0_SUBTYPE_MASK) >> 743 IEEE80211_FC0_SUBTYPE_SHIFT], 744 ieee80211_chan2ieee(ic, ic->ic_curchan)); 745 } 746#endif 747 IEEE80211_NODE_STAT(ni, tx_mgmt); 748 749 ret = ieee80211_raw_output(vap, ni, m, params); 750 IEEE80211_TX_UNLOCK(ic); 751 return (ret); 752} 753 754/* 755 * Send a null data frame to the specified node. If the station 756 * is setup for QoS then a QoS Null Data frame is constructed. 757 * If this is a WDS station then a 4-address frame is constructed. 758 * 759 * NB: the caller is assumed to have setup a node reference 760 * for use; this is necessary to deal with a race condition 761 * when probing for inactive stations. Like ieee80211_mgmt_output 762 * we must cleanup any node reference on error; however we 763 * can safely just unref it as we know it will never be the 764 * last reference to the node. 765 */ 766int 767ieee80211_send_nulldata(struct ieee80211_node *ni) 768{ 769 struct ieee80211vap *vap = ni->ni_vap; 770 struct ieee80211com *ic = ni->ni_ic; 771 struct mbuf *m; 772 struct ieee80211_frame *wh; 773 int hdrlen; 774 uint8_t *frm; 775 int ret; 776 777 if (vap->iv_state == IEEE80211_S_CAC) { 778 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH, 779 ni, "block %s frame in CAC state", "null data"); 780 ieee80211_unref_node(&ni); 781 vap->iv_stats.is_tx_badstate++; 782 return EIO; /* XXX */ 783 } 784 785 if (ni->ni_flags & (IEEE80211_NODE_QOS|IEEE80211_NODE_HT)) 786 hdrlen = sizeof(struct ieee80211_qosframe); 787 else 788 hdrlen = sizeof(struct ieee80211_frame); 789 /* NB: only WDS vap's get 4-address frames */ 790 if (vap->iv_opmode == IEEE80211_M_WDS) 791 hdrlen += IEEE80211_ADDR_LEN; 792 if (ic->ic_flags & IEEE80211_F_DATAPAD) 793 hdrlen = roundup(hdrlen, sizeof(uint32_t)); 794 795 m = ieee80211_getmgtframe(&frm, ic->ic_headroom + hdrlen, 0); 796 if (m == NULL) { 797 /* XXX debug msg */ 798 ieee80211_unref_node(&ni); 799 vap->iv_stats.is_tx_nobuf++; 800 return ENOMEM; 801 } 802 KASSERT(M_LEADINGSPACE(m) >= hdrlen, 803 ("leading space %zd", M_LEADINGSPACE(m))); 804 M_PREPEND(m, hdrlen, M_NOWAIT); 805 if (m == NULL) { 806 /* NB: cannot happen */ 807 ieee80211_free_node(ni); 808 return ENOMEM; 809 } 810 811 IEEE80211_TX_LOCK(ic); 812 813 wh = mtod(m, struct ieee80211_frame *); /* NB: a little lie */ 814 if (ni->ni_flags & IEEE80211_NODE_QOS) { 815 const int tid = WME_AC_TO_TID(WME_AC_BE); 816 uint8_t *qos; 817 818 ieee80211_send_setup(ni, m, 819 IEEE80211_FC0_TYPE_DATA | IEEE80211_FC0_SUBTYPE_QOS_NULL, 820 tid, vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid); 821 822 if (vap->iv_opmode == IEEE80211_M_WDS) 823 qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos; 824 else 825 qos = ((struct ieee80211_qosframe *) wh)->i_qos; 826 qos[0] = tid & IEEE80211_QOS_TID; 827 if (ic->ic_wme.wme_wmeChanParams.cap_wmeParams[WME_AC_BE].wmep_noackPolicy) 828 qos[0] |= IEEE80211_QOS_ACKPOLICY_NOACK; 829 qos[1] = 0; 830 } else { 831 ieee80211_send_setup(ni, m, 832 IEEE80211_FC0_TYPE_DATA | IEEE80211_FC0_SUBTYPE_NODATA, 833 IEEE80211_NONQOS_TID, 834 vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid); 835 } 836 if (vap->iv_opmode != IEEE80211_M_WDS) { 837 /* NB: power management bit is never sent by an AP */ 838 if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) && 839 vap->iv_opmode != IEEE80211_M_HOSTAP) 840 wh->i_fc[1] |= IEEE80211_FC1_PWR_MGT; 841 } 842 m->m_len = m->m_pkthdr.len = hdrlen; 843 m->m_flags |= M_ENCAP; /* mark encapsulated */ 844 845 M_WME_SETAC(m, WME_AC_BE); 846 847 IEEE80211_NODE_STAT(ni, tx_data); 848 849 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS, ni, 850 "send %snull data frame on channel %u, pwr mgt %s", 851 ni->ni_flags & IEEE80211_NODE_QOS ? "QoS " : "", 852 ieee80211_chan2ieee(ic, ic->ic_curchan), 853 wh->i_fc[1] & IEEE80211_FC1_PWR_MGT ? "ena" : "dis"); 854 855 ret = ieee80211_raw_output(vap, ni, m, NULL); 856 IEEE80211_TX_UNLOCK(ic); 857 return (ret); 858} 859 860/* 861 * Assign priority to a frame based on any vlan tag assigned 862 * to the station and/or any Diffserv setting in an IP header. 863 * Finally, if an ACM policy is setup (in station mode) it's 864 * applied. 865 */ 866int 867ieee80211_classify(struct ieee80211_node *ni, struct mbuf *m) 868{ 869 const struct ether_header *eh = mtod(m, struct ether_header *); 870 int v_wme_ac, d_wme_ac, ac; 871 872 /* 873 * Always promote PAE/EAPOL frames to high priority. 874 */ 875 if (eh->ether_type == htons(ETHERTYPE_PAE)) { 876 /* NB: mark so others don't need to check header */ 877 m->m_flags |= M_EAPOL; 878 ac = WME_AC_VO; 879 goto done; 880 } 881 /* 882 * Non-qos traffic goes to BE. 883 */ 884 if ((ni->ni_flags & IEEE80211_NODE_QOS) == 0) { 885 ac = WME_AC_BE; 886 goto done; 887 } 888 889 /* 890 * If node has a vlan tag then all traffic 891 * to it must have a matching tag. 892 */ 893 v_wme_ac = 0; 894 if (ni->ni_vlan != 0) { 895 if ((m->m_flags & M_VLANTAG) == 0) { 896 IEEE80211_NODE_STAT(ni, tx_novlantag); 897 return 1; 898 } 899 if (EVL_VLANOFTAG(m->m_pkthdr.ether_vtag) != 900 EVL_VLANOFTAG(ni->ni_vlan)) { 901 IEEE80211_NODE_STAT(ni, tx_vlanmismatch); 902 return 1; 903 } 904 /* map vlan priority to AC */ 905 v_wme_ac = TID_TO_WME_AC(EVL_PRIOFTAG(ni->ni_vlan)); 906 } 907 908 /* XXX m_copydata may be too slow for fast path */ 909#ifdef INET 910 if (eh->ether_type == htons(ETHERTYPE_IP)) { 911 uint8_t tos; 912 /* 913 * IP frame, map the DSCP bits from the TOS field. 914 */ 915 /* NB: ip header may not be in first mbuf */ 916 m_copydata(m, sizeof(struct ether_header) + 917 offsetof(struct ip, ip_tos), sizeof(tos), &tos); 918 tos >>= 5; /* NB: ECN + low 3 bits of DSCP */ 919 d_wme_ac = TID_TO_WME_AC(tos); 920 } else { 921#endif /* INET */ 922#ifdef INET6 923 if (eh->ether_type == htons(ETHERTYPE_IPV6)) { 924 uint32_t flow; 925 uint8_t tos; 926 /* 927 * IPv6 frame, map the DSCP bits from the traffic class field. 928 */ 929 m_copydata(m, sizeof(struct ether_header) + 930 offsetof(struct ip6_hdr, ip6_flow), sizeof(flow), 931 (caddr_t) &flow); 932 tos = (uint8_t)(ntohl(flow) >> 20); 933 tos >>= 5; /* NB: ECN + low 3 bits of DSCP */ 934 d_wme_ac = TID_TO_WME_AC(tos); 935 } else { 936#endif /* INET6 */ 937 d_wme_ac = WME_AC_BE; 938#ifdef INET6 939 } 940#endif 941#ifdef INET 942 } 943#endif 944 /* 945 * Use highest priority AC. 946 */ 947 if (v_wme_ac > d_wme_ac) 948 ac = v_wme_ac; 949 else 950 ac = d_wme_ac; 951 952 /* 953 * Apply ACM policy. 954 */ 955 if (ni->ni_vap->iv_opmode == IEEE80211_M_STA) { 956 static const int acmap[4] = { 957 WME_AC_BK, /* WME_AC_BE */ 958 WME_AC_BK, /* WME_AC_BK */ 959 WME_AC_BE, /* WME_AC_VI */ 960 WME_AC_VI, /* WME_AC_VO */ 961 }; 962 struct ieee80211com *ic = ni->ni_ic; 963 964 while (ac != WME_AC_BK && 965 ic->ic_wme.wme_wmeBssChanParams.cap_wmeParams[ac].wmep_acm) 966 ac = acmap[ac]; 967 } 968done: 969 M_WME_SETAC(m, ac); 970 return 0; 971} 972 973/* 974 * Insure there is sufficient contiguous space to encapsulate the 975 * 802.11 data frame. If room isn't already there, arrange for it. 976 * Drivers and cipher modules assume we have done the necessary work 977 * and fail rudely if they don't find the space they need. 978 */ 979struct mbuf * 980ieee80211_mbuf_adjust(struct ieee80211vap *vap, int hdrsize, 981 struct ieee80211_key *key, struct mbuf *m) 982{ 983#define TO_BE_RECLAIMED (sizeof(struct ether_header) - sizeof(struct llc)) 984 int needed_space = vap->iv_ic->ic_headroom + hdrsize; 985 986 if (key != NULL) { 987 /* XXX belongs in crypto code? */ 988 needed_space += key->wk_cipher->ic_header; 989 /* XXX frags */ 990 /* 991 * When crypto is being done in the host we must insure 992 * the data are writable for the cipher routines; clone 993 * a writable mbuf chain. 994 * XXX handle SWMIC specially 995 */ 996 if (key->wk_flags & (IEEE80211_KEY_SWENCRYPT|IEEE80211_KEY_SWENMIC)) { 997 m = m_unshare(m, M_NOWAIT); 998 if (m == NULL) { 999 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 1000 "%s: cannot get writable mbuf\n", __func__); 1001 vap->iv_stats.is_tx_nobuf++; /* XXX new stat */ 1002 return NULL; 1003 } 1004 } 1005 } 1006 /* 1007 * We know we are called just before stripping an Ethernet 1008 * header and prepending an LLC header. This means we know 1009 * there will be 1010 * sizeof(struct ether_header) - sizeof(struct llc) 1011 * bytes recovered to which we need additional space for the 1012 * 802.11 header and any crypto header. 1013 */ 1014 /* XXX check trailing space and copy instead? */ 1015 if (M_LEADINGSPACE(m) < needed_space - TO_BE_RECLAIMED) { 1016 struct mbuf *n = m_gethdr(M_NOWAIT, m->m_type); 1017 if (n == NULL) { 1018 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 1019 "%s: cannot expand storage\n", __func__); 1020 vap->iv_stats.is_tx_nobuf++; 1021 m_freem(m); 1022 return NULL; 1023 } 1024 KASSERT(needed_space <= MHLEN, 1025 ("not enough room, need %u got %d\n", needed_space, MHLEN)); 1026 /* 1027 * Setup new mbuf to have leading space to prepend the 1028 * 802.11 header and any crypto header bits that are 1029 * required (the latter are added when the driver calls 1030 * back to ieee80211_crypto_encap to do crypto encapsulation). 1031 */ 1032 /* NB: must be first 'cuz it clobbers m_data */ 1033 m_move_pkthdr(n, m); 1034 n->m_len = 0; /* NB: m_gethdr does not set */ 1035 n->m_data += needed_space; 1036 /* 1037 * Pull up Ethernet header to create the expected layout. 1038 * We could use m_pullup but that's overkill (i.e. we don't 1039 * need the actual data) and it cannot fail so do it inline 1040 * for speed. 1041 */ 1042 /* NB: struct ether_header is known to be contiguous */ 1043 n->m_len += sizeof(struct ether_header); 1044 m->m_len -= sizeof(struct ether_header); 1045 m->m_data += sizeof(struct ether_header); 1046 /* 1047 * Replace the head of the chain. 1048 */ 1049 n->m_next = m; 1050 m = n; 1051 } 1052 return m; 1053#undef TO_BE_RECLAIMED 1054} 1055 1056/* 1057 * Return the transmit key to use in sending a unicast frame. 1058 * If a unicast key is set we use that. When no unicast key is set 1059 * we fall back to the default transmit key. 1060 */ 1061static __inline struct ieee80211_key * 1062ieee80211_crypto_getucastkey(struct ieee80211vap *vap, 1063 struct ieee80211_node *ni) 1064{ 1065 if (IEEE80211_KEY_UNDEFINED(&ni->ni_ucastkey)) { 1066 if (vap->iv_def_txkey == IEEE80211_KEYIX_NONE || 1067 IEEE80211_KEY_UNDEFINED(&vap->iv_nw_keys[vap->iv_def_txkey])) 1068 return NULL; 1069 return &vap->iv_nw_keys[vap->iv_def_txkey]; 1070 } else { 1071 return &ni->ni_ucastkey; 1072 } 1073} 1074 1075/* 1076 * Return the transmit key to use in sending a multicast frame. 1077 * Multicast traffic always uses the group key which is installed as 1078 * the default tx key. 1079 */ 1080static __inline struct ieee80211_key * 1081ieee80211_crypto_getmcastkey(struct ieee80211vap *vap, 1082 struct ieee80211_node *ni) 1083{ 1084 if (vap->iv_def_txkey == IEEE80211_KEYIX_NONE || 1085 IEEE80211_KEY_UNDEFINED(&vap->iv_nw_keys[vap->iv_def_txkey])) 1086 return NULL; 1087 return &vap->iv_nw_keys[vap->iv_def_txkey]; 1088} 1089 1090/* 1091 * Encapsulate an outbound data frame. The mbuf chain is updated. 1092 * If an error is encountered NULL is returned. The caller is required 1093 * to provide a node reference and pullup the ethernet header in the 1094 * first mbuf. 1095 * 1096 * NB: Packet is assumed to be processed by ieee80211_classify which 1097 * marked EAPOL frames w/ M_EAPOL. 1098 */ 1099struct mbuf * 1100ieee80211_encap(struct ieee80211vap *vap, struct ieee80211_node *ni, 1101 struct mbuf *m) 1102{ 1103#define WH4(wh) ((struct ieee80211_frame_addr4 *)(wh)) 1104#define MC01(mc) ((struct ieee80211_meshcntl_ae01 *)mc) 1105 struct ieee80211com *ic = ni->ni_ic; 1106#ifdef IEEE80211_SUPPORT_MESH 1107 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1108 struct ieee80211_meshcntl_ae10 *mc; 1109 struct ieee80211_mesh_route *rt = NULL; 1110 int dir = -1; 1111#endif 1112 struct ether_header eh; 1113 struct ieee80211_frame *wh; 1114 struct ieee80211_key *key; 1115 struct llc *llc; 1116 int hdrsize, hdrspace, datalen, addqos, txfrag, is4addr; 1117 ieee80211_seq seqno; 1118 int meshhdrsize, meshae; 1119 uint8_t *qos; 1120 1121 IEEE80211_TX_LOCK_ASSERT(ic); 1122 1123 /* 1124 * Copy existing Ethernet header to a safe place. The 1125 * rest of the code assumes it's ok to strip it when 1126 * reorganizing state for the final encapsulation. 1127 */ 1128 KASSERT(m->m_len >= sizeof(eh), ("no ethernet header!")); 1129 ETHER_HEADER_COPY(&eh, mtod(m, caddr_t)); 1130 1131 /* 1132 * Insure space for additional headers. First identify 1133 * transmit key to use in calculating any buffer adjustments 1134 * required. This is also used below to do privacy 1135 * encapsulation work. Then calculate the 802.11 header 1136 * size and any padding required by the driver. 1137 * 1138 * Note key may be NULL if we fall back to the default 1139 * transmit key and that is not set. In that case the 1140 * buffer may not be expanded as needed by the cipher 1141 * routines, but they will/should discard it. 1142 */ 1143 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 1144 if (vap->iv_opmode == IEEE80211_M_STA || 1145 !IEEE80211_IS_MULTICAST(eh.ether_dhost) || 1146 (vap->iv_opmode == IEEE80211_M_WDS && 1147 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY))) 1148 key = ieee80211_crypto_getucastkey(vap, ni); 1149 else 1150 key = ieee80211_crypto_getmcastkey(vap, ni); 1151 if (key == NULL && (m->m_flags & M_EAPOL) == 0) { 1152 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, 1153 eh.ether_dhost, 1154 "no default transmit key (%s) deftxkey %u", 1155 __func__, vap->iv_def_txkey); 1156 vap->iv_stats.is_tx_nodefkey++; 1157 goto bad; 1158 } 1159 } else 1160 key = NULL; 1161 /* 1162 * XXX Some ap's don't handle QoS-encapsulated EAPOL 1163 * frames so suppress use. This may be an issue if other 1164 * ap's require all data frames to be QoS-encapsulated 1165 * once negotiated in which case we'll need to make this 1166 * configurable. 1167 * NB: mesh data frames are QoS. 1168 */ 1169 addqos = ((ni->ni_flags & (IEEE80211_NODE_QOS|IEEE80211_NODE_HT)) || 1170 (vap->iv_opmode == IEEE80211_M_MBSS)) && 1171 (m->m_flags & M_EAPOL) == 0; 1172 if (addqos) 1173 hdrsize = sizeof(struct ieee80211_qosframe); 1174 else 1175 hdrsize = sizeof(struct ieee80211_frame); 1176#ifdef IEEE80211_SUPPORT_MESH 1177 if (vap->iv_opmode == IEEE80211_M_MBSS) { 1178 /* 1179 * Mesh data frames are encapsulated according to the 1180 * rules of Section 11B.8.5 (p.139 of D3.0 spec). 1181 * o Group Addressed data (aka multicast) originating 1182 * at the local sta are sent w/ 3-address format and 1183 * address extension mode 00 1184 * o Individually Addressed data (aka unicast) originating 1185 * at the local sta are sent w/ 4-address format and 1186 * address extension mode 00 1187 * o Group Addressed data forwarded from a non-mesh sta are 1188 * sent w/ 3-address format and address extension mode 01 1189 * o Individually Address data from another sta are sent 1190 * w/ 4-address format and address extension mode 10 1191 */ 1192 is4addr = 0; /* NB: don't use, disable */ 1193 if (!IEEE80211_IS_MULTICAST(eh.ether_dhost)) { 1194 rt = ieee80211_mesh_rt_find(vap, eh.ether_dhost); 1195 KASSERT(rt != NULL, ("route is NULL")); 1196 dir = IEEE80211_FC1_DIR_DSTODS; 1197 hdrsize += IEEE80211_ADDR_LEN; 1198 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { 1199 if (IEEE80211_ADDR_EQ(rt->rt_mesh_gate, 1200 vap->iv_myaddr)) { 1201 IEEE80211_NOTE_MAC(vap, 1202 IEEE80211_MSG_MESH, 1203 eh.ether_dhost, 1204 "%s", "trying to send to ourself"); 1205 goto bad; 1206 } 1207 meshae = IEEE80211_MESH_AE_10; 1208 meshhdrsize = 1209 sizeof(struct ieee80211_meshcntl_ae10); 1210 } else { 1211 meshae = IEEE80211_MESH_AE_00; 1212 meshhdrsize = 1213 sizeof(struct ieee80211_meshcntl); 1214 } 1215 } else { 1216 dir = IEEE80211_FC1_DIR_FROMDS; 1217 if (!IEEE80211_ADDR_EQ(eh.ether_shost, vap->iv_myaddr)) { 1218 /* proxy group */ 1219 meshae = IEEE80211_MESH_AE_01; 1220 meshhdrsize = 1221 sizeof(struct ieee80211_meshcntl_ae01); 1222 } else { 1223 /* group */ 1224 meshae = IEEE80211_MESH_AE_00; 1225 meshhdrsize = sizeof(struct ieee80211_meshcntl); 1226 } 1227 } 1228 } else { 1229#endif 1230 /* 1231 * 4-address frames need to be generated for: 1232 * o packets sent through a WDS vap (IEEE80211_M_WDS) 1233 * o packets sent through a vap marked for relaying 1234 * (e.g. a station operating with dynamic WDS) 1235 */ 1236 is4addr = vap->iv_opmode == IEEE80211_M_WDS || 1237 ((vap->iv_flags_ext & IEEE80211_FEXT_4ADDR) && 1238 !IEEE80211_ADDR_EQ(eh.ether_shost, vap->iv_myaddr)); 1239 if (is4addr) 1240 hdrsize += IEEE80211_ADDR_LEN; 1241 meshhdrsize = meshae = 0; 1242#ifdef IEEE80211_SUPPORT_MESH 1243 } 1244#endif 1245 /* 1246 * Honor driver DATAPAD requirement. 1247 */ 1248 if (ic->ic_flags & IEEE80211_F_DATAPAD) 1249 hdrspace = roundup(hdrsize, sizeof(uint32_t)); 1250 else 1251 hdrspace = hdrsize; 1252 1253 if (__predict_true((m->m_flags & M_FF) == 0)) { 1254 /* 1255 * Normal frame. 1256 */ 1257 m = ieee80211_mbuf_adjust(vap, hdrspace + meshhdrsize, key, m); 1258 if (m == NULL) { 1259 /* NB: ieee80211_mbuf_adjust handles msgs+statistics */ 1260 goto bad; 1261 } 1262 /* NB: this could be optimized 'cuz of ieee80211_mbuf_adjust */ 1263 m_adj(m, sizeof(struct ether_header) - sizeof(struct llc)); 1264 llc = mtod(m, struct llc *); 1265 llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP; 1266 llc->llc_control = LLC_UI; 1267 llc->llc_snap.org_code[0] = 0; 1268 llc->llc_snap.org_code[1] = 0; 1269 llc->llc_snap.org_code[2] = 0; 1270 llc->llc_snap.ether_type = eh.ether_type; 1271 } else { 1272#ifdef IEEE80211_SUPPORT_SUPERG 1273 /* 1274 * Aggregated frame. 1275 */ 1276 m = ieee80211_ff_encap(vap, m, hdrspace + meshhdrsize, key); 1277 if (m == NULL) 1278#endif 1279 goto bad; 1280 } 1281 datalen = m->m_pkthdr.len; /* NB: w/o 802.11 header */ 1282 1283 M_PREPEND(m, hdrspace + meshhdrsize, M_NOWAIT); 1284 if (m == NULL) { 1285 vap->iv_stats.is_tx_nobuf++; 1286 goto bad; 1287 } 1288 wh = mtod(m, struct ieee80211_frame *); 1289 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_DATA; 1290 *(uint16_t *)wh->i_dur = 0; 1291 qos = NULL; /* NB: quiet compiler */ 1292 if (is4addr) { 1293 wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS; 1294 IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_macaddr); 1295 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); 1296 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_dhost); 1297 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, eh.ether_shost); 1298 } else switch (vap->iv_opmode) { 1299 case IEEE80211_M_STA: 1300 wh->i_fc[1] = IEEE80211_FC1_DIR_TODS; 1301 IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_bssid); 1302 IEEE80211_ADDR_COPY(wh->i_addr2, eh.ether_shost); 1303 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_dhost); 1304 break; 1305 case IEEE80211_M_IBSS: 1306 case IEEE80211_M_AHDEMO: 1307 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 1308 IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost); 1309 IEEE80211_ADDR_COPY(wh->i_addr2, eh.ether_shost); 1310 /* 1311 * NB: always use the bssid from iv_bss as the 1312 * neighbor's may be stale after an ibss merge 1313 */ 1314 IEEE80211_ADDR_COPY(wh->i_addr3, vap->iv_bss->ni_bssid); 1315 break; 1316 case IEEE80211_M_HOSTAP: 1317 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS; 1318 IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost); 1319 IEEE80211_ADDR_COPY(wh->i_addr2, ni->ni_bssid); 1320 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_shost); 1321 break; 1322#ifdef IEEE80211_SUPPORT_MESH 1323 case IEEE80211_M_MBSS: 1324 /* NB: offset by hdrspace to deal with DATAPAD */ 1325 mc = (struct ieee80211_meshcntl_ae10 *) 1326 (mtod(m, uint8_t *) + hdrspace); 1327 wh->i_fc[1] = dir; 1328 switch (meshae) { 1329 case IEEE80211_MESH_AE_00: /* no proxy */ 1330 mc->mc_flags = 0; 1331 if (dir == IEEE80211_FC1_DIR_DSTODS) { /* ucast */ 1332 IEEE80211_ADDR_COPY(wh->i_addr1, 1333 ni->ni_macaddr); 1334 IEEE80211_ADDR_COPY(wh->i_addr2, 1335 vap->iv_myaddr); 1336 IEEE80211_ADDR_COPY(wh->i_addr3, 1337 eh.ether_dhost); 1338 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, 1339 eh.ether_shost); 1340 qos =((struct ieee80211_qosframe_addr4 *) 1341 wh)->i_qos; 1342 } else if (dir == IEEE80211_FC1_DIR_FROMDS) { 1343 /* mcast */ 1344 IEEE80211_ADDR_COPY(wh->i_addr1, 1345 eh.ether_dhost); 1346 IEEE80211_ADDR_COPY(wh->i_addr2, 1347 vap->iv_myaddr); 1348 IEEE80211_ADDR_COPY(wh->i_addr3, 1349 eh.ether_shost); 1350 qos = ((struct ieee80211_qosframe *) 1351 wh)->i_qos; 1352 } 1353 break; 1354 case IEEE80211_MESH_AE_01: /* mcast, proxy */ 1355 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS; 1356 IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost); 1357 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); 1358 IEEE80211_ADDR_COPY(wh->i_addr3, vap->iv_myaddr); 1359 mc->mc_flags = 1; 1360 IEEE80211_ADDR_COPY(MC01(mc)->mc_addr4, 1361 eh.ether_shost); 1362 qos = ((struct ieee80211_qosframe *) wh)->i_qos; 1363 break; 1364 case IEEE80211_MESH_AE_10: /* ucast, proxy */ 1365 KASSERT(rt != NULL, ("route is NULL")); 1366 IEEE80211_ADDR_COPY(wh->i_addr1, rt->rt_nexthop); 1367 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); 1368 IEEE80211_ADDR_COPY(wh->i_addr3, rt->rt_mesh_gate); 1369 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, vap->iv_myaddr); 1370 mc->mc_flags = IEEE80211_MESH_AE_10; 1371 IEEE80211_ADDR_COPY(mc->mc_addr5, eh.ether_dhost); 1372 IEEE80211_ADDR_COPY(mc->mc_addr6, eh.ether_shost); 1373 qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos; 1374 break; 1375 default: 1376 KASSERT(0, ("meshae %d", meshae)); 1377 break; 1378 } 1379 mc->mc_ttl = ms->ms_ttl; 1380 ms->ms_seq++; 1381 LE_WRITE_4(mc->mc_seq, ms->ms_seq); 1382 break; 1383#endif 1384 case IEEE80211_M_WDS: /* NB: is4addr should always be true */ 1385 default: 1386 goto bad; 1387 } 1388 if (m->m_flags & M_MORE_DATA) 1389 wh->i_fc[1] |= IEEE80211_FC1_MORE_DATA; 1390 if (addqos) { 1391 int ac, tid; 1392 1393 if (is4addr) { 1394 qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos; 1395 /* NB: mesh case handled earlier */ 1396 } else if (vap->iv_opmode != IEEE80211_M_MBSS) 1397 qos = ((struct ieee80211_qosframe *) wh)->i_qos; 1398 ac = M_WME_GETAC(m); 1399 /* map from access class/queue to 11e header priorty value */ 1400 tid = WME_AC_TO_TID(ac); 1401 qos[0] = tid & IEEE80211_QOS_TID; 1402 if (ic->ic_wme.wme_wmeChanParams.cap_wmeParams[ac].wmep_noackPolicy) 1403 qos[0] |= IEEE80211_QOS_ACKPOLICY_NOACK; 1404#ifdef IEEE80211_SUPPORT_MESH 1405 if (vap->iv_opmode == IEEE80211_M_MBSS) 1406 qos[1] = IEEE80211_QOS_MC; 1407 else 1408#endif 1409 qos[1] = 0; 1410 wh->i_fc[0] |= IEEE80211_FC0_SUBTYPE_QOS; 1411 1412 if ((m->m_flags & M_AMPDU_MPDU) == 0) { 1413 /* 1414 * NB: don't assign a sequence # to potential 1415 * aggregates; we expect this happens at the 1416 * point the frame comes off any aggregation q 1417 * as otherwise we may introduce holes in the 1418 * BA sequence space and/or make window accouting 1419 * more difficult. 1420 * 1421 * XXX may want to control this with a driver 1422 * capability; this may also change when we pull 1423 * aggregation up into net80211 1424 */ 1425 seqno = ni->ni_txseqs[tid]++; 1426 *(uint16_t *)wh->i_seq = 1427 htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); 1428 M_SEQNO_SET(m, seqno); 1429 } 1430 } else { 1431 seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]++; 1432 *(uint16_t *)wh->i_seq = 1433 htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); 1434 M_SEQNO_SET(m, seqno); 1435 } 1436 1437 1438 /* check if xmit fragmentation is required */ 1439 txfrag = (m->m_pkthdr.len > vap->iv_fragthreshold && 1440 !IEEE80211_IS_MULTICAST(wh->i_addr1) && 1441 (vap->iv_caps & IEEE80211_C_TXFRAG) && 1442 (m->m_flags & (M_FF | M_AMPDU_MPDU)) == 0); 1443 if (key != NULL) { 1444 /* 1445 * IEEE 802.1X: send EAPOL frames always in the clear. 1446 * WPA/WPA2: encrypt EAPOL keys when pairwise keys are set. 1447 */ 1448 if ((m->m_flags & M_EAPOL) == 0 || 1449 ((vap->iv_flags & IEEE80211_F_WPA) && 1450 (vap->iv_opmode == IEEE80211_M_STA ? 1451 !IEEE80211_KEY_UNDEFINED(key) : 1452 !IEEE80211_KEY_UNDEFINED(&ni->ni_ucastkey)))) { 1453 wh->i_fc[1] |= IEEE80211_FC1_WEP; 1454 if (!ieee80211_crypto_enmic(vap, key, m, txfrag)) { 1455 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, 1456 eh.ether_dhost, 1457 "%s", "enmic failed, discard frame"); 1458 vap->iv_stats.is_crypto_enmicfail++; 1459 goto bad; 1460 } 1461 } 1462 } 1463 if (txfrag && !ieee80211_fragment(vap, m, hdrsize, 1464 key != NULL ? key->wk_cipher->ic_header : 0, vap->iv_fragthreshold)) 1465 goto bad; 1466 1467 m->m_flags |= M_ENCAP; /* mark encapsulated */ 1468 1469 IEEE80211_NODE_STAT(ni, tx_data); 1470 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1471 IEEE80211_NODE_STAT(ni, tx_mcast); 1472 m->m_flags |= M_MCAST; 1473 } else 1474 IEEE80211_NODE_STAT(ni, tx_ucast); 1475 IEEE80211_NODE_STAT_ADD(ni, tx_bytes, datalen); 1476 1477 return m; 1478bad: 1479 if (m != NULL) 1480 m_freem(m); 1481 return NULL; 1482#undef WH4 1483#undef MC01 1484} 1485 1486/* 1487 * Fragment the frame according to the specified mtu. 1488 * The size of the 802.11 header (w/o padding) is provided 1489 * so we don't need to recalculate it. We create a new 1490 * mbuf for each fragment and chain it through m_nextpkt; 1491 * we might be able to optimize this by reusing the original 1492 * packet's mbufs but that is significantly more complicated. 1493 */ 1494static int 1495ieee80211_fragment(struct ieee80211vap *vap, struct mbuf *m0, 1496 u_int hdrsize, u_int ciphdrsize, u_int mtu) 1497{ 1498 struct ieee80211com *ic = vap->iv_ic; 1499 struct ieee80211_frame *wh, *whf; 1500 struct mbuf *m, *prev, *next; 1501 u_int totalhdrsize, fragno, fragsize, off, remainder, payload; 1502 u_int hdrspace; 1503 1504 KASSERT(m0->m_nextpkt == NULL, ("mbuf already chained?")); 1505 KASSERT(m0->m_pkthdr.len > mtu, 1506 ("pktlen %u mtu %u", m0->m_pkthdr.len, mtu)); 1507 1508 /* 1509 * Honor driver DATAPAD requirement. 1510 */ 1511 if (ic->ic_flags & IEEE80211_F_DATAPAD) 1512 hdrspace = roundup(hdrsize, sizeof(uint32_t)); 1513 else 1514 hdrspace = hdrsize; 1515 1516 wh = mtod(m0, struct ieee80211_frame *); 1517 /* NB: mark the first frag; it will be propagated below */ 1518 wh->i_fc[1] |= IEEE80211_FC1_MORE_FRAG; 1519 totalhdrsize = hdrspace + ciphdrsize; 1520 fragno = 1; 1521 off = mtu - ciphdrsize; 1522 remainder = m0->m_pkthdr.len - off; 1523 prev = m0; 1524 do { 1525 fragsize = totalhdrsize + remainder; 1526 if (fragsize > mtu) 1527 fragsize = mtu; 1528 /* XXX fragsize can be >2048! */ 1529 KASSERT(fragsize < MCLBYTES, 1530 ("fragment size %u too big!", fragsize)); 1531 if (fragsize > MHLEN) 1532 m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR); 1533 else 1534 m = m_gethdr(M_NOWAIT, MT_DATA); 1535 if (m == NULL) 1536 goto bad; 1537 /* leave room to prepend any cipher header */ 1538 m_align(m, fragsize - ciphdrsize); 1539 1540 /* 1541 * Form the header in the fragment. Note that since 1542 * we mark the first fragment with the MORE_FRAG bit 1543 * it automatically is propagated to each fragment; we 1544 * need only clear it on the last fragment (done below). 1545 * NB: frag 1+ dont have Mesh Control field present. 1546 */ 1547 whf = mtod(m, struct ieee80211_frame *); 1548 memcpy(whf, wh, hdrsize); 1549#ifdef IEEE80211_SUPPORT_MESH 1550 if (vap->iv_opmode == IEEE80211_M_MBSS) { 1551 if (IEEE80211_IS_DSTODS(wh)) 1552 ((struct ieee80211_qosframe_addr4 *) 1553 whf)->i_qos[1] &= ~IEEE80211_QOS_MC; 1554 else 1555 ((struct ieee80211_qosframe *) 1556 whf)->i_qos[1] &= ~IEEE80211_QOS_MC; 1557 } 1558#endif 1559 *(uint16_t *)&whf->i_seq[0] |= htole16( 1560 (fragno & IEEE80211_SEQ_FRAG_MASK) << 1561 IEEE80211_SEQ_FRAG_SHIFT); 1562 fragno++; 1563 1564 payload = fragsize - totalhdrsize; 1565 /* NB: destination is known to be contiguous */ 1566 1567 m_copydata(m0, off, payload, mtod(m, uint8_t *) + hdrspace); 1568 m->m_len = hdrspace + payload; 1569 m->m_pkthdr.len = hdrspace + payload; 1570 m->m_flags |= M_FRAG; 1571 1572 /* chain up the fragment */ 1573 prev->m_nextpkt = m; 1574 prev = m; 1575 1576 /* deduct fragment just formed */ 1577 remainder -= payload; 1578 off += payload; 1579 } while (remainder != 0); 1580 1581 /* set the last fragment */ 1582 m->m_flags |= M_LASTFRAG; 1583 whf->i_fc[1] &= ~IEEE80211_FC1_MORE_FRAG; 1584 1585 /* strip first mbuf now that everything has been copied */ 1586 m_adj(m0, -(m0->m_pkthdr.len - (mtu - ciphdrsize))); 1587 m0->m_flags |= M_FIRSTFRAG | M_FRAG; 1588 1589 vap->iv_stats.is_tx_fragframes++; 1590 vap->iv_stats.is_tx_frags += fragno-1; 1591 1592 return 1; 1593bad: 1594 /* reclaim fragments but leave original frame for caller to free */ 1595 for (m = m0->m_nextpkt; m != NULL; m = next) { 1596 next = m->m_nextpkt; 1597 m->m_nextpkt = NULL; /* XXX paranoid */ 1598 m_freem(m); 1599 } 1600 m0->m_nextpkt = NULL; 1601 return 0; 1602} 1603 1604/* 1605 * Add a supported rates element id to a frame. 1606 */ 1607uint8_t * 1608ieee80211_add_rates(uint8_t *frm, const struct ieee80211_rateset *rs) 1609{ 1610 int nrates; 1611 1612 *frm++ = IEEE80211_ELEMID_RATES; 1613 nrates = rs->rs_nrates; 1614 if (nrates > IEEE80211_RATE_SIZE) 1615 nrates = IEEE80211_RATE_SIZE; 1616 *frm++ = nrates; 1617 memcpy(frm, rs->rs_rates, nrates); 1618 return frm + nrates; 1619} 1620 1621/* 1622 * Add an extended supported rates element id to a frame. 1623 */ 1624uint8_t * 1625ieee80211_add_xrates(uint8_t *frm, const struct ieee80211_rateset *rs) 1626{ 1627 /* 1628 * Add an extended supported rates element if operating in 11g mode. 1629 */ 1630 if (rs->rs_nrates > IEEE80211_RATE_SIZE) { 1631 int nrates = rs->rs_nrates - IEEE80211_RATE_SIZE; 1632 *frm++ = IEEE80211_ELEMID_XRATES; 1633 *frm++ = nrates; 1634 memcpy(frm, rs->rs_rates + IEEE80211_RATE_SIZE, nrates); 1635 frm += nrates; 1636 } 1637 return frm; 1638} 1639 1640/* 1641 * Add an ssid element to a frame. 1642 */ 1643static uint8_t * 1644ieee80211_add_ssid(uint8_t *frm, const uint8_t *ssid, u_int len) 1645{ 1646 *frm++ = IEEE80211_ELEMID_SSID; 1647 *frm++ = len; 1648 memcpy(frm, ssid, len); 1649 return frm + len; 1650} 1651 1652/* 1653 * Add an erp element to a frame. 1654 */ 1655static uint8_t * 1656ieee80211_add_erp(uint8_t *frm, struct ieee80211com *ic) 1657{ 1658 uint8_t erp; 1659 1660 *frm++ = IEEE80211_ELEMID_ERP; 1661 *frm++ = 1; 1662 erp = 0; 1663 if (ic->ic_nonerpsta != 0) 1664 erp |= IEEE80211_ERP_NON_ERP_PRESENT; 1665 if (ic->ic_flags & IEEE80211_F_USEPROT) 1666 erp |= IEEE80211_ERP_USE_PROTECTION; 1667 if (ic->ic_flags & IEEE80211_F_USEBARKER) 1668 erp |= IEEE80211_ERP_LONG_PREAMBLE; 1669 *frm++ = erp; 1670 return frm; 1671} 1672 1673/* 1674 * Add a CFParams element to a frame. 1675 */ 1676static uint8_t * 1677ieee80211_add_cfparms(uint8_t *frm, struct ieee80211com *ic) 1678{ 1679#define ADDSHORT(frm, v) do { \ 1680 LE_WRITE_2(frm, v); \ 1681 frm += 2; \ 1682} while (0) 1683 *frm++ = IEEE80211_ELEMID_CFPARMS; 1684 *frm++ = 6; 1685 *frm++ = 0; /* CFP count */ 1686 *frm++ = 2; /* CFP period */ 1687 ADDSHORT(frm, 0); /* CFP MaxDuration (TU) */ 1688 ADDSHORT(frm, 0); /* CFP CurRemaining (TU) */ 1689 return frm; 1690#undef ADDSHORT 1691} 1692 1693static __inline uint8_t * 1694add_appie(uint8_t *frm, const struct ieee80211_appie *ie) 1695{ 1696 memcpy(frm, ie->ie_data, ie->ie_len); 1697 return frm + ie->ie_len; 1698} 1699 1700static __inline uint8_t * 1701add_ie(uint8_t *frm, const uint8_t *ie) 1702{ 1703 memcpy(frm, ie, 2 + ie[1]); 1704 return frm + 2 + ie[1]; 1705} 1706 1707#define WME_OUI_BYTES 0x00, 0x50, 0xf2 1708/* 1709 * Add a WME information element to a frame. 1710 */ 1711static uint8_t * 1712ieee80211_add_wme_info(uint8_t *frm, struct ieee80211_wme_state *wme) 1713{ 1714 static const struct ieee80211_wme_info info = { 1715 .wme_id = IEEE80211_ELEMID_VENDOR, 1716 .wme_len = sizeof(struct ieee80211_wme_info) - 2, 1717 .wme_oui = { WME_OUI_BYTES }, 1718 .wme_type = WME_OUI_TYPE, 1719 .wme_subtype = WME_INFO_OUI_SUBTYPE, 1720 .wme_version = WME_VERSION, 1721 .wme_info = 0, 1722 }; 1723 memcpy(frm, &info, sizeof(info)); 1724 return frm + sizeof(info); 1725} 1726 1727/* 1728 * Add a WME parameters element to a frame. 1729 */ 1730static uint8_t * 1731ieee80211_add_wme_param(uint8_t *frm, struct ieee80211_wme_state *wme) 1732{ 1733#define SM(_v, _f) (((_v) << _f##_S) & _f) 1734#define ADDSHORT(frm, v) do { \ 1735 LE_WRITE_2(frm, v); \ 1736 frm += 2; \ 1737} while (0) 1738 /* NB: this works 'cuz a param has an info at the front */ 1739 static const struct ieee80211_wme_info param = { 1740 .wme_id = IEEE80211_ELEMID_VENDOR, 1741 .wme_len = sizeof(struct ieee80211_wme_param) - 2, 1742 .wme_oui = { WME_OUI_BYTES }, 1743 .wme_type = WME_OUI_TYPE, 1744 .wme_subtype = WME_PARAM_OUI_SUBTYPE, 1745 .wme_version = WME_VERSION, 1746 }; 1747 int i; 1748 1749 memcpy(frm, ¶m, sizeof(param)); 1750 frm += __offsetof(struct ieee80211_wme_info, wme_info); 1751 *frm++ = wme->wme_bssChanParams.cap_info; /* AC info */ 1752 *frm++ = 0; /* reserved field */ 1753 for (i = 0; i < WME_NUM_AC; i++) { 1754 const struct wmeParams *ac = 1755 &wme->wme_bssChanParams.cap_wmeParams[i]; 1756 *frm++ = SM(i, WME_PARAM_ACI) 1757 | SM(ac->wmep_acm, WME_PARAM_ACM) 1758 | SM(ac->wmep_aifsn, WME_PARAM_AIFSN) 1759 ; 1760 *frm++ = SM(ac->wmep_logcwmax, WME_PARAM_LOGCWMAX) 1761 | SM(ac->wmep_logcwmin, WME_PARAM_LOGCWMIN) 1762 ; 1763 ADDSHORT(frm, ac->wmep_txopLimit); 1764 } 1765 return frm; 1766#undef SM 1767#undef ADDSHORT 1768} 1769#undef WME_OUI_BYTES 1770 1771/* 1772 * Add an 11h Power Constraint element to a frame. 1773 */ 1774static uint8_t * 1775ieee80211_add_powerconstraint(uint8_t *frm, struct ieee80211vap *vap) 1776{ 1777 const struct ieee80211_channel *c = vap->iv_bss->ni_chan; 1778 /* XXX per-vap tx power limit? */ 1779 int8_t limit = vap->iv_ic->ic_txpowlimit / 2; 1780 1781 frm[0] = IEEE80211_ELEMID_PWRCNSTR; 1782 frm[1] = 1; 1783 frm[2] = c->ic_maxregpower > limit ? c->ic_maxregpower - limit : 0; 1784 return frm + 3; 1785} 1786 1787/* 1788 * Add an 11h Power Capability element to a frame. 1789 */ 1790static uint8_t * 1791ieee80211_add_powercapability(uint8_t *frm, const struct ieee80211_channel *c) 1792{ 1793 frm[0] = IEEE80211_ELEMID_PWRCAP; 1794 frm[1] = 2; 1795 frm[2] = c->ic_minpower; 1796 frm[3] = c->ic_maxpower; 1797 return frm + 4; 1798} 1799 1800/* 1801 * Add an 11h Supported Channels element to a frame. 1802 */ 1803static uint8_t * 1804ieee80211_add_supportedchannels(uint8_t *frm, struct ieee80211com *ic) 1805{ 1806 static const int ielen = 26; 1807 1808 frm[0] = IEEE80211_ELEMID_SUPPCHAN; 1809 frm[1] = ielen; 1810 /* XXX not correct */ 1811 memcpy(frm+2, ic->ic_chan_avail, ielen); 1812 return frm + 2 + ielen; 1813} 1814 1815/* 1816 * Add an 11h Quiet time element to a frame. 1817 */ 1818static uint8_t * 1819ieee80211_add_quiet(uint8_t *frm, struct ieee80211vap *vap) 1820{ 1821 struct ieee80211_quiet_ie *quiet = (struct ieee80211_quiet_ie *) frm; 1822 1823 quiet->quiet_ie = IEEE80211_ELEMID_QUIET; 1824 quiet->len = 6; 1825 if (vap->iv_quiet_count_value == 1) 1826 vap->iv_quiet_count_value = vap->iv_quiet_count; 1827 else if (vap->iv_quiet_count_value > 1) 1828 vap->iv_quiet_count_value--; 1829 1830 if (vap->iv_quiet_count_value == 0) { 1831 /* value 0 is reserved as per 802.11h standerd */ 1832 vap->iv_quiet_count_value = 1; 1833 } 1834 1835 quiet->tbttcount = vap->iv_quiet_count_value; 1836 quiet->period = vap->iv_quiet_period; 1837 quiet->duration = htole16(vap->iv_quiet_duration); 1838 quiet->offset = htole16(vap->iv_quiet_offset); 1839 return frm + sizeof(*quiet); 1840} 1841 1842/* 1843 * Add an 11h Channel Switch Announcement element to a frame. 1844 * Note that we use the per-vap CSA count to adjust the global 1845 * counter so we can use this routine to form probe response 1846 * frames and get the current count. 1847 */ 1848static uint8_t * 1849ieee80211_add_csa(uint8_t *frm, struct ieee80211vap *vap) 1850{ 1851 struct ieee80211com *ic = vap->iv_ic; 1852 struct ieee80211_csa_ie *csa = (struct ieee80211_csa_ie *) frm; 1853 1854 csa->csa_ie = IEEE80211_ELEMID_CSA; 1855 csa->csa_len = 3; 1856 csa->csa_mode = 1; /* XXX force quiet on channel */ 1857 csa->csa_newchan = ieee80211_chan2ieee(ic, ic->ic_csa_newchan); 1858 csa->csa_count = ic->ic_csa_count - vap->iv_csa_count; 1859 return frm + sizeof(*csa); 1860} 1861 1862/* 1863 * Add an 11h country information element to a frame. 1864 */ 1865static uint8_t * 1866ieee80211_add_countryie(uint8_t *frm, struct ieee80211com *ic) 1867{ 1868 1869 if (ic->ic_countryie == NULL || 1870 ic->ic_countryie_chan != ic->ic_bsschan) { 1871 /* 1872 * Handle lazy construction of ie. This is done on 1873 * first use and after a channel change that requires 1874 * re-calculation. 1875 */ 1876 if (ic->ic_countryie != NULL) 1877 free(ic->ic_countryie, M_80211_NODE_IE); 1878 ic->ic_countryie = ieee80211_alloc_countryie(ic); 1879 if (ic->ic_countryie == NULL) 1880 return frm; 1881 ic->ic_countryie_chan = ic->ic_bsschan; 1882 } 1883 return add_appie(frm, ic->ic_countryie); 1884} 1885 1886/* 1887 * Send a probe request frame with the specified ssid 1888 * and any optional information element data. 1889 */ 1890int 1891ieee80211_send_probereq(struct ieee80211_node *ni, 1892 const uint8_t sa[IEEE80211_ADDR_LEN], 1893 const uint8_t da[IEEE80211_ADDR_LEN], 1894 const uint8_t bssid[IEEE80211_ADDR_LEN], 1895 const uint8_t *ssid, size_t ssidlen) 1896{ 1897 struct ieee80211vap *vap = ni->ni_vap; 1898 struct ieee80211com *ic = ni->ni_ic; 1899 const struct ieee80211_txparam *tp; 1900 struct ieee80211_bpf_params params; 1901 struct ieee80211_frame *wh; 1902 const struct ieee80211_rateset *rs; 1903 struct mbuf *m; 1904 uint8_t *frm; 1905 int ret; 1906 1907 if (vap->iv_state == IEEE80211_S_CAC) { 1908 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni, 1909 "block %s frame in CAC state", "probe request"); 1910 vap->iv_stats.is_tx_badstate++; 1911 return EIO; /* XXX */ 1912 } 1913 1914 /* 1915 * Hold a reference on the node so it doesn't go away until after 1916 * the xmit is complete all the way in the driver. On error we 1917 * will remove our reference. 1918 */ 1919 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1920 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", 1921 __func__, __LINE__, 1922 ni, ether_sprintf(ni->ni_macaddr), 1923 ieee80211_node_refcnt(ni)+1); 1924 ieee80211_ref_node(ni); 1925 1926 /* 1927 * prreq frame format 1928 * [tlv] ssid 1929 * [tlv] supported rates 1930 * [tlv] RSN (optional) 1931 * [tlv] extended supported rates 1932 * [tlv] WPA (optional) 1933 * [tlv] user-specified ie's 1934 */ 1935 m = ieee80211_getmgtframe(&frm, 1936 ic->ic_headroom + sizeof(struct ieee80211_frame), 1937 2 + IEEE80211_NWID_LEN 1938 + 2 + IEEE80211_RATE_SIZE 1939 + sizeof(struct ieee80211_ie_wpa) 1940 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 1941 + sizeof(struct ieee80211_ie_wpa) 1942 + (vap->iv_appie_probereq != NULL ? 1943 vap->iv_appie_probereq->ie_len : 0) 1944 ); 1945 if (m == NULL) { 1946 vap->iv_stats.is_tx_nobuf++; 1947 ieee80211_free_node(ni); 1948 return ENOMEM; 1949 } 1950 1951 frm = ieee80211_add_ssid(frm, ssid, ssidlen); 1952 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 1953 frm = ieee80211_add_rates(frm, rs); 1954 if (vap->iv_flags & IEEE80211_F_WPA2) { 1955 if (vap->iv_rsn_ie != NULL) 1956 frm = add_ie(frm, vap->iv_rsn_ie); 1957 /* XXX else complain? */ 1958 } 1959 frm = ieee80211_add_xrates(frm, rs); 1960 if (vap->iv_flags & IEEE80211_F_WPA1) { 1961 if (vap->iv_wpa_ie != NULL) 1962 frm = add_ie(frm, vap->iv_wpa_ie); 1963 /* XXX else complain? */ 1964 } 1965 if (vap->iv_appie_probereq != NULL) 1966 frm = add_appie(frm, vap->iv_appie_probereq); 1967 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 1968 1969 KASSERT(M_LEADINGSPACE(m) >= sizeof(struct ieee80211_frame), 1970 ("leading space %zd", M_LEADINGSPACE(m))); 1971 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); 1972 if (m == NULL) { 1973 /* NB: cannot happen */ 1974 ieee80211_free_node(ni); 1975 return ENOMEM; 1976 } 1977 1978 IEEE80211_TX_LOCK(ic); 1979 wh = mtod(m, struct ieee80211_frame *); 1980 ieee80211_send_setup(ni, m, 1981 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ, 1982 IEEE80211_NONQOS_TID, sa, da, bssid); 1983 /* XXX power management? */ 1984 m->m_flags |= M_ENCAP; /* mark encapsulated */ 1985 1986 M_WME_SETAC(m, WME_AC_BE); 1987 1988 IEEE80211_NODE_STAT(ni, tx_probereq); 1989 IEEE80211_NODE_STAT(ni, tx_mgmt); 1990 1991 IEEE80211_DPRINTF(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS, 1992 "send probe req on channel %u bssid %s ssid \"%.*s\"\n", 1993 ieee80211_chan2ieee(ic, ic->ic_curchan), ether_sprintf(bssid), 1994 ssidlen, ssid); 1995 1996 memset(¶ms, 0, sizeof(params)); 1997 params.ibp_pri = M_WME_GETAC(m); 1998 tp = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)]; 1999 params.ibp_rate0 = tp->mgmtrate; 2000 if (IEEE80211_IS_MULTICAST(da)) { 2001 params.ibp_flags |= IEEE80211_BPF_NOACK; 2002 params.ibp_try0 = 1; 2003 } else 2004 params.ibp_try0 = tp->maxretry; 2005 params.ibp_power = ni->ni_txpower; 2006 ret = ieee80211_raw_output(vap, ni, m, ¶ms); 2007 IEEE80211_TX_UNLOCK(ic); 2008 return (ret); 2009} 2010 2011/* 2012 * Calculate capability information for mgt frames. 2013 */ 2014uint16_t 2015ieee80211_getcapinfo(struct ieee80211vap *vap, struct ieee80211_channel *chan) 2016{ 2017 struct ieee80211com *ic = vap->iv_ic; 2018 uint16_t capinfo; 2019 2020 KASSERT(vap->iv_opmode != IEEE80211_M_STA, ("station mode")); 2021 2022 if (vap->iv_opmode == IEEE80211_M_HOSTAP) 2023 capinfo = IEEE80211_CAPINFO_ESS; 2024 else if (vap->iv_opmode == IEEE80211_M_IBSS) 2025 capinfo = IEEE80211_CAPINFO_IBSS; 2026 else 2027 capinfo = 0; 2028 if (vap->iv_flags & IEEE80211_F_PRIVACY) 2029 capinfo |= IEEE80211_CAPINFO_PRIVACY; 2030 if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && 2031 IEEE80211_IS_CHAN_2GHZ(chan)) 2032 capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE; 2033 if (ic->ic_flags & IEEE80211_F_SHSLOT) 2034 capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME; 2035 if (IEEE80211_IS_CHAN_5GHZ(chan) && (vap->iv_flags & IEEE80211_F_DOTH)) 2036 capinfo |= IEEE80211_CAPINFO_SPECTRUM_MGMT; 2037 return capinfo; 2038} 2039 2040/* 2041 * Send a management frame. The node is for the destination (or ic_bss 2042 * when in station mode). Nodes other than ic_bss have their reference 2043 * count bumped to reflect our use for an indeterminant time. 2044 */ 2045int 2046ieee80211_send_mgmt(struct ieee80211_node *ni, int type, int arg) 2047{ 2048#define HTFLAGS (IEEE80211_NODE_HT | IEEE80211_NODE_HTCOMPAT) 2049#define senderr(_x, _v) do { vap->iv_stats._v++; ret = _x; goto bad; } while (0) 2050 struct ieee80211vap *vap = ni->ni_vap; 2051 struct ieee80211com *ic = ni->ni_ic; 2052 struct ieee80211_node *bss = vap->iv_bss; 2053 struct ieee80211_bpf_params params; 2054 struct mbuf *m; 2055 uint8_t *frm; 2056 uint16_t capinfo; 2057 int has_challenge, is_shared_key, ret, status; 2058 2059 KASSERT(ni != NULL, ("null node")); 2060 2061 /* 2062 * Hold a reference on the node so it doesn't go away until after 2063 * the xmit is complete all the way in the driver. On error we 2064 * will remove our reference. 2065 */ 2066 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2067 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", 2068 __func__, __LINE__, 2069 ni, ether_sprintf(ni->ni_macaddr), 2070 ieee80211_node_refcnt(ni)+1); 2071 ieee80211_ref_node(ni); 2072 2073 memset(¶ms, 0, sizeof(params)); 2074 switch (type) { 2075 2076 case IEEE80211_FC0_SUBTYPE_AUTH: 2077 status = arg >> 16; 2078 arg &= 0xffff; 2079 has_challenge = ((arg == IEEE80211_AUTH_SHARED_CHALLENGE || 2080 arg == IEEE80211_AUTH_SHARED_RESPONSE) && 2081 ni->ni_challenge != NULL); 2082 2083 /* 2084 * Deduce whether we're doing open authentication or 2085 * shared key authentication. We do the latter if 2086 * we're in the middle of a shared key authentication 2087 * handshake or if we're initiating an authentication 2088 * request and configured to use shared key. 2089 */ 2090 is_shared_key = has_challenge || 2091 arg >= IEEE80211_AUTH_SHARED_RESPONSE || 2092 (arg == IEEE80211_AUTH_SHARED_REQUEST && 2093 bss->ni_authmode == IEEE80211_AUTH_SHARED); 2094 2095 m = ieee80211_getmgtframe(&frm, 2096 ic->ic_headroom + sizeof(struct ieee80211_frame), 2097 3 * sizeof(uint16_t) 2098 + (has_challenge && status == IEEE80211_STATUS_SUCCESS ? 2099 sizeof(uint16_t)+IEEE80211_CHALLENGE_LEN : 0) 2100 ); 2101 if (m == NULL) 2102 senderr(ENOMEM, is_tx_nobuf); 2103 2104 ((uint16_t *)frm)[0] = 2105 (is_shared_key) ? htole16(IEEE80211_AUTH_ALG_SHARED) 2106 : htole16(IEEE80211_AUTH_ALG_OPEN); 2107 ((uint16_t *)frm)[1] = htole16(arg); /* sequence number */ 2108 ((uint16_t *)frm)[2] = htole16(status);/* status */ 2109 2110 if (has_challenge && status == IEEE80211_STATUS_SUCCESS) { 2111 ((uint16_t *)frm)[3] = 2112 htole16((IEEE80211_CHALLENGE_LEN << 8) | 2113 IEEE80211_ELEMID_CHALLENGE); 2114 memcpy(&((uint16_t *)frm)[4], ni->ni_challenge, 2115 IEEE80211_CHALLENGE_LEN); 2116 m->m_pkthdr.len = m->m_len = 2117 4 * sizeof(uint16_t) + IEEE80211_CHALLENGE_LEN; 2118 if (arg == IEEE80211_AUTH_SHARED_RESPONSE) { 2119 IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni, 2120 "request encrypt frame (%s)", __func__); 2121 /* mark frame for encryption */ 2122 params.ibp_flags |= IEEE80211_BPF_CRYPTO; 2123 } 2124 } else 2125 m->m_pkthdr.len = m->m_len = 3 * sizeof(uint16_t); 2126 2127 /* XXX not right for shared key */ 2128 if (status == IEEE80211_STATUS_SUCCESS) 2129 IEEE80211_NODE_STAT(ni, tx_auth); 2130 else 2131 IEEE80211_NODE_STAT(ni, tx_auth_fail); 2132 2133 if (vap->iv_opmode == IEEE80211_M_STA) 2134 ieee80211_add_callback(m, ieee80211_tx_mgt_cb, 2135 (void *) vap->iv_state); 2136 break; 2137 2138 case IEEE80211_FC0_SUBTYPE_DEAUTH: 2139 IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni, 2140 "send station deauthenticate (reason %d)", arg); 2141 m = ieee80211_getmgtframe(&frm, 2142 ic->ic_headroom + sizeof(struct ieee80211_frame), 2143 sizeof(uint16_t)); 2144 if (m == NULL) 2145 senderr(ENOMEM, is_tx_nobuf); 2146 *(uint16_t *)frm = htole16(arg); /* reason */ 2147 m->m_pkthdr.len = m->m_len = sizeof(uint16_t); 2148 2149 IEEE80211_NODE_STAT(ni, tx_deauth); 2150 IEEE80211_NODE_STAT_SET(ni, tx_deauth_code, arg); 2151 2152 ieee80211_node_unauthorize(ni); /* port closed */ 2153 break; 2154 2155 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 2156 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 2157 /* 2158 * asreq frame format 2159 * [2] capability information 2160 * [2] listen interval 2161 * [6*] current AP address (reassoc only) 2162 * [tlv] ssid 2163 * [tlv] supported rates 2164 * [tlv] extended supported rates 2165 * [4] power capability (optional) 2166 * [28] supported channels (optional) 2167 * [tlv] HT capabilities 2168 * [tlv] WME (optional) 2169 * [tlv] Vendor OUI HT capabilities (optional) 2170 * [tlv] Atheros capabilities (if negotiated) 2171 * [tlv] AppIE's (optional) 2172 */ 2173 m = ieee80211_getmgtframe(&frm, 2174 ic->ic_headroom + sizeof(struct ieee80211_frame), 2175 sizeof(uint16_t) 2176 + sizeof(uint16_t) 2177 + IEEE80211_ADDR_LEN 2178 + 2 + IEEE80211_NWID_LEN 2179 + 2 + IEEE80211_RATE_SIZE 2180 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2181 + 4 2182 + 2 + 26 2183 + sizeof(struct ieee80211_wme_info) 2184 + sizeof(struct ieee80211_ie_htcap) 2185 + 4 + sizeof(struct ieee80211_ie_htcap) 2186#ifdef IEEE80211_SUPPORT_SUPERG 2187 + sizeof(struct ieee80211_ath_ie) 2188#endif 2189 + (vap->iv_appie_wpa != NULL ? 2190 vap->iv_appie_wpa->ie_len : 0) 2191 + (vap->iv_appie_assocreq != NULL ? 2192 vap->iv_appie_assocreq->ie_len : 0) 2193 ); 2194 if (m == NULL) 2195 senderr(ENOMEM, is_tx_nobuf); 2196 2197 KASSERT(vap->iv_opmode == IEEE80211_M_STA, 2198 ("wrong mode %u", vap->iv_opmode)); 2199 capinfo = IEEE80211_CAPINFO_ESS; 2200 if (vap->iv_flags & IEEE80211_F_PRIVACY) 2201 capinfo |= IEEE80211_CAPINFO_PRIVACY; 2202 /* 2203 * NB: Some 11a AP's reject the request when 2204 * short premable is set. 2205 */ 2206 if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && 2207 IEEE80211_IS_CHAN_2GHZ(ic->ic_curchan)) 2208 capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE; 2209 if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 2210 (ic->ic_caps & IEEE80211_C_SHSLOT)) 2211 capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME; 2212 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SPECTRUM_MGMT) && 2213 (vap->iv_flags & IEEE80211_F_DOTH)) 2214 capinfo |= IEEE80211_CAPINFO_SPECTRUM_MGMT; 2215 *(uint16_t *)frm = htole16(capinfo); 2216 frm += 2; 2217 2218 KASSERT(bss->ni_intval != 0, ("beacon interval is zero!")); 2219 *(uint16_t *)frm = htole16(howmany(ic->ic_lintval, 2220 bss->ni_intval)); 2221 frm += 2; 2222 2223 if (type == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) { 2224 IEEE80211_ADDR_COPY(frm, bss->ni_bssid); 2225 frm += IEEE80211_ADDR_LEN; 2226 } 2227 2228 frm = ieee80211_add_ssid(frm, ni->ni_essid, ni->ni_esslen); 2229 frm = ieee80211_add_rates(frm, &ni->ni_rates); 2230 if (vap->iv_flags & IEEE80211_F_WPA2) { 2231 if (vap->iv_rsn_ie != NULL) 2232 frm = add_ie(frm, vap->iv_rsn_ie); 2233 /* XXX else complain? */ 2234 } 2235 frm = ieee80211_add_xrates(frm, &ni->ni_rates); 2236 if (capinfo & IEEE80211_CAPINFO_SPECTRUM_MGMT) { 2237 frm = ieee80211_add_powercapability(frm, 2238 ic->ic_curchan); 2239 frm = ieee80211_add_supportedchannels(frm, ic); 2240 } 2241 if ((vap->iv_flags_ht & IEEE80211_FHT_HT) && 2242 ni->ni_ies.htcap_ie != NULL && 2243 ni->ni_ies.htcap_ie[0] == IEEE80211_ELEMID_HTCAP) 2244 frm = ieee80211_add_htcap(frm, ni); 2245 if (vap->iv_flags & IEEE80211_F_WPA1) { 2246 if (vap->iv_wpa_ie != NULL) 2247 frm = add_ie(frm, vap->iv_wpa_ie); 2248 /* XXX else complain */ 2249 } 2250 if ((ic->ic_flags & IEEE80211_F_WME) && 2251 ni->ni_ies.wme_ie != NULL) 2252 frm = ieee80211_add_wme_info(frm, &ic->ic_wme); 2253 if ((vap->iv_flags_ht & IEEE80211_FHT_HT) && 2254 ni->ni_ies.htcap_ie != NULL && 2255 ni->ni_ies.htcap_ie[0] == IEEE80211_ELEMID_VENDOR) 2256 frm = ieee80211_add_htcap_vendor(frm, ni); 2257#ifdef IEEE80211_SUPPORT_SUPERG 2258 if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS)) { 2259 frm = ieee80211_add_ath(frm, 2260 IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS), 2261 ((vap->iv_flags & IEEE80211_F_WPA) == 0 && 2262 ni->ni_authmode != IEEE80211_AUTH_8021X) ? 2263 vap->iv_def_txkey : IEEE80211_KEYIX_NONE); 2264 } 2265#endif /* IEEE80211_SUPPORT_SUPERG */ 2266 if (vap->iv_appie_assocreq != NULL) 2267 frm = add_appie(frm, vap->iv_appie_assocreq); 2268 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2269 2270 ieee80211_add_callback(m, ieee80211_tx_mgt_cb, 2271 (void *) vap->iv_state); 2272 break; 2273 2274 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 2275 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 2276 /* 2277 * asresp frame format 2278 * [2] capability information 2279 * [2] status 2280 * [2] association ID 2281 * [tlv] supported rates 2282 * [tlv] extended supported rates 2283 * [tlv] HT capabilities (standard, if STA enabled) 2284 * [tlv] HT information (standard, if STA enabled) 2285 * [tlv] WME (if configured and STA enabled) 2286 * [tlv] HT capabilities (vendor OUI, if STA enabled) 2287 * [tlv] HT information (vendor OUI, if STA enabled) 2288 * [tlv] Atheros capabilities (if STA enabled) 2289 * [tlv] AppIE's (optional) 2290 */ 2291 m = ieee80211_getmgtframe(&frm, 2292 ic->ic_headroom + sizeof(struct ieee80211_frame), 2293 sizeof(uint16_t) 2294 + sizeof(uint16_t) 2295 + sizeof(uint16_t) 2296 + 2 + IEEE80211_RATE_SIZE 2297 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2298 + sizeof(struct ieee80211_ie_htcap) + 4 2299 + sizeof(struct ieee80211_ie_htinfo) + 4 2300 + sizeof(struct ieee80211_wme_param) 2301#ifdef IEEE80211_SUPPORT_SUPERG 2302 + sizeof(struct ieee80211_ath_ie) 2303#endif 2304 + (vap->iv_appie_assocresp != NULL ? 2305 vap->iv_appie_assocresp->ie_len : 0) 2306 ); 2307 if (m == NULL) 2308 senderr(ENOMEM, is_tx_nobuf); 2309 2310 capinfo = ieee80211_getcapinfo(vap, bss->ni_chan); 2311 *(uint16_t *)frm = htole16(capinfo); 2312 frm += 2; 2313 2314 *(uint16_t *)frm = htole16(arg); /* status */ 2315 frm += 2; 2316 2317 if (arg == IEEE80211_STATUS_SUCCESS) { 2318 *(uint16_t *)frm = htole16(ni->ni_associd); 2319 IEEE80211_NODE_STAT(ni, tx_assoc); 2320 } else 2321 IEEE80211_NODE_STAT(ni, tx_assoc_fail); 2322 frm += 2; 2323 2324 frm = ieee80211_add_rates(frm, &ni->ni_rates); 2325 frm = ieee80211_add_xrates(frm, &ni->ni_rates); 2326 /* NB: respond according to what we received */ 2327 if ((ni->ni_flags & HTFLAGS) == IEEE80211_NODE_HT) { 2328 frm = ieee80211_add_htcap(frm, ni); 2329 frm = ieee80211_add_htinfo(frm, ni); 2330 } 2331 if ((vap->iv_flags & IEEE80211_F_WME) && 2332 ni->ni_ies.wme_ie != NULL) 2333 frm = ieee80211_add_wme_param(frm, &ic->ic_wme); 2334 if ((ni->ni_flags & HTFLAGS) == HTFLAGS) { 2335 frm = ieee80211_add_htcap_vendor(frm, ni); 2336 frm = ieee80211_add_htinfo_vendor(frm, ni); 2337 } 2338#ifdef IEEE80211_SUPPORT_SUPERG 2339 if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS)) 2340 frm = ieee80211_add_ath(frm, 2341 IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS), 2342 ((vap->iv_flags & IEEE80211_F_WPA) == 0 && 2343 ni->ni_authmode != IEEE80211_AUTH_8021X) ? 2344 vap->iv_def_txkey : IEEE80211_KEYIX_NONE); 2345#endif /* IEEE80211_SUPPORT_SUPERG */ 2346 if (vap->iv_appie_assocresp != NULL) 2347 frm = add_appie(frm, vap->iv_appie_assocresp); 2348 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2349 break; 2350 2351 case IEEE80211_FC0_SUBTYPE_DISASSOC: 2352 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 2353 "send station disassociate (reason %d)", arg); 2354 m = ieee80211_getmgtframe(&frm, 2355 ic->ic_headroom + sizeof(struct ieee80211_frame), 2356 sizeof(uint16_t)); 2357 if (m == NULL) 2358 senderr(ENOMEM, is_tx_nobuf); 2359 *(uint16_t *)frm = htole16(arg); /* reason */ 2360 m->m_pkthdr.len = m->m_len = sizeof(uint16_t); 2361 2362 IEEE80211_NODE_STAT(ni, tx_disassoc); 2363 IEEE80211_NODE_STAT_SET(ni, tx_disassoc_code, arg); 2364 break; 2365 2366 default: 2367 IEEE80211_NOTE(vap, IEEE80211_MSG_ANY, ni, 2368 "invalid mgmt frame type %u", type); 2369 senderr(EINVAL, is_tx_unknownmgt); 2370 /* NOTREACHED */ 2371 } 2372 2373 /* NB: force non-ProbeResp frames to the highest queue */ 2374 params.ibp_pri = WME_AC_VO; 2375 params.ibp_rate0 = bss->ni_txparms->mgmtrate; 2376 /* NB: we know all frames are unicast */ 2377 params.ibp_try0 = bss->ni_txparms->maxretry; 2378 params.ibp_power = bss->ni_txpower; 2379 return ieee80211_mgmt_output(ni, m, type, ¶ms); 2380bad: 2381 ieee80211_free_node(ni); 2382 return ret; 2383#undef senderr 2384#undef HTFLAGS 2385} 2386 2387/* 2388 * Return an mbuf with a probe response frame in it. 2389 * Space is left to prepend and 802.11 header at the 2390 * front but it's left to the caller to fill in. 2391 */ 2392struct mbuf * 2393ieee80211_alloc_proberesp(struct ieee80211_node *bss, int legacy) 2394{ 2395 struct ieee80211vap *vap = bss->ni_vap; 2396 struct ieee80211com *ic = bss->ni_ic; 2397 const struct ieee80211_rateset *rs; 2398 struct mbuf *m; 2399 uint16_t capinfo; 2400 uint8_t *frm; 2401 2402 /* 2403 * probe response frame format 2404 * [8] time stamp 2405 * [2] beacon interval 2406 * [2] cabability information 2407 * [tlv] ssid 2408 * [tlv] supported rates 2409 * [tlv] parameter set (FH/DS) 2410 * [tlv] parameter set (IBSS) 2411 * [tlv] country (optional) 2412 * [3] power control (optional) 2413 * [5] channel switch announcement (CSA) (optional) 2414 * [tlv] extended rate phy (ERP) 2415 * [tlv] extended supported rates 2416 * [tlv] RSN (optional) 2417 * [tlv] HT capabilities 2418 * [tlv] HT information 2419 * [tlv] WPA (optional) 2420 * [tlv] WME (optional) 2421 * [tlv] Vendor OUI HT capabilities (optional) 2422 * [tlv] Vendor OUI HT information (optional) 2423 * [tlv] Atheros capabilities 2424 * [tlv] AppIE's (optional) 2425 * [tlv] Mesh ID (MBSS) 2426 * [tlv] Mesh Conf (MBSS) 2427 */ 2428 m = ieee80211_getmgtframe(&frm, 2429 ic->ic_headroom + sizeof(struct ieee80211_frame), 2430 8 2431 + sizeof(uint16_t) 2432 + sizeof(uint16_t) 2433 + 2 + IEEE80211_NWID_LEN 2434 + 2 + IEEE80211_RATE_SIZE 2435 + 7 /* max(7,3) */ 2436 + IEEE80211_COUNTRY_MAX_SIZE 2437 + 3 2438 + sizeof(struct ieee80211_csa_ie) 2439 + sizeof(struct ieee80211_quiet_ie) 2440 + 3 2441 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2442 + sizeof(struct ieee80211_ie_wpa) 2443 + sizeof(struct ieee80211_ie_htcap) 2444 + sizeof(struct ieee80211_ie_htinfo) 2445 + sizeof(struct ieee80211_ie_wpa) 2446 + sizeof(struct ieee80211_wme_param) 2447 + 4 + sizeof(struct ieee80211_ie_htcap) 2448 + 4 + sizeof(struct ieee80211_ie_htinfo) 2449#ifdef IEEE80211_SUPPORT_SUPERG 2450 + sizeof(struct ieee80211_ath_ie) 2451#endif 2452#ifdef IEEE80211_SUPPORT_MESH 2453 + 2 + IEEE80211_MESHID_LEN 2454 + sizeof(struct ieee80211_meshconf_ie) 2455#endif 2456 + (vap->iv_appie_proberesp != NULL ? 2457 vap->iv_appie_proberesp->ie_len : 0) 2458 ); 2459 if (m == NULL) { 2460 vap->iv_stats.is_tx_nobuf++; 2461 return NULL; 2462 } 2463 2464 memset(frm, 0, 8); /* timestamp should be filled later */ 2465 frm += 8; 2466 *(uint16_t *)frm = htole16(bss->ni_intval); 2467 frm += 2; 2468 capinfo = ieee80211_getcapinfo(vap, bss->ni_chan); 2469 *(uint16_t *)frm = htole16(capinfo); 2470 frm += 2; 2471 2472 frm = ieee80211_add_ssid(frm, bss->ni_essid, bss->ni_esslen); 2473 rs = ieee80211_get_suprates(ic, bss->ni_chan); 2474 frm = ieee80211_add_rates(frm, rs); 2475 2476 if (IEEE80211_IS_CHAN_FHSS(bss->ni_chan)) { 2477 *frm++ = IEEE80211_ELEMID_FHPARMS; 2478 *frm++ = 5; 2479 *frm++ = bss->ni_fhdwell & 0x00ff; 2480 *frm++ = (bss->ni_fhdwell >> 8) & 0x00ff; 2481 *frm++ = IEEE80211_FH_CHANSET( 2482 ieee80211_chan2ieee(ic, bss->ni_chan)); 2483 *frm++ = IEEE80211_FH_CHANPAT( 2484 ieee80211_chan2ieee(ic, bss->ni_chan)); 2485 *frm++ = bss->ni_fhindex; 2486 } else { 2487 *frm++ = IEEE80211_ELEMID_DSPARMS; 2488 *frm++ = 1; 2489 *frm++ = ieee80211_chan2ieee(ic, bss->ni_chan); 2490 } 2491 2492 if (vap->iv_opmode == IEEE80211_M_IBSS) { 2493 *frm++ = IEEE80211_ELEMID_IBSSPARMS; 2494 *frm++ = 2; 2495 *frm++ = 0; *frm++ = 0; /* TODO: ATIM window */ 2496 } 2497 if ((vap->iv_flags & IEEE80211_F_DOTH) || 2498 (vap->iv_flags_ext & IEEE80211_FEXT_DOTD)) 2499 frm = ieee80211_add_countryie(frm, ic); 2500 if (vap->iv_flags & IEEE80211_F_DOTH) { 2501 if (IEEE80211_IS_CHAN_5GHZ(bss->ni_chan)) 2502 frm = ieee80211_add_powerconstraint(frm, vap); 2503 if (ic->ic_flags & IEEE80211_F_CSAPENDING) 2504 frm = ieee80211_add_csa(frm, vap); 2505 } 2506 if (vap->iv_flags & IEEE80211_F_DOTH) { 2507 if (IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) && 2508 (vap->iv_flags_ext & IEEE80211_FEXT_DFS)) { 2509 if (vap->iv_quiet) 2510 frm = ieee80211_add_quiet(frm, vap); 2511 } 2512 } 2513 if (IEEE80211_IS_CHAN_ANYG(bss->ni_chan)) 2514 frm = ieee80211_add_erp(frm, ic); 2515 frm = ieee80211_add_xrates(frm, rs); 2516 if (vap->iv_flags & IEEE80211_F_WPA2) { 2517 if (vap->iv_rsn_ie != NULL) 2518 frm = add_ie(frm, vap->iv_rsn_ie); 2519 /* XXX else complain? */ 2520 } 2521 /* 2522 * NB: legacy 11b clients do not get certain ie's. 2523 * The caller identifies such clients by passing 2524 * a token in legacy to us. Could expand this to be 2525 * any legacy client for stuff like HT ie's. 2526 */ 2527 if (IEEE80211_IS_CHAN_HT(bss->ni_chan) && 2528 legacy != IEEE80211_SEND_LEGACY_11B) { 2529 frm = ieee80211_add_htcap(frm, bss); 2530 frm = ieee80211_add_htinfo(frm, bss); 2531 } 2532 if (vap->iv_flags & IEEE80211_F_WPA1) { 2533 if (vap->iv_wpa_ie != NULL) 2534 frm = add_ie(frm, vap->iv_wpa_ie); 2535 /* XXX else complain? */ 2536 } 2537 if (vap->iv_flags & IEEE80211_F_WME) 2538 frm = ieee80211_add_wme_param(frm, &ic->ic_wme); 2539 if (IEEE80211_IS_CHAN_HT(bss->ni_chan) && 2540 (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) && 2541 legacy != IEEE80211_SEND_LEGACY_11B) { 2542 frm = ieee80211_add_htcap_vendor(frm, bss); 2543 frm = ieee80211_add_htinfo_vendor(frm, bss); 2544 } 2545#ifdef IEEE80211_SUPPORT_SUPERG 2546 if ((vap->iv_flags & IEEE80211_F_ATHEROS) && 2547 legacy != IEEE80211_SEND_LEGACY_11B) 2548 frm = ieee80211_add_athcaps(frm, bss); 2549#endif 2550 if (vap->iv_appie_proberesp != NULL) 2551 frm = add_appie(frm, vap->iv_appie_proberesp); 2552#ifdef IEEE80211_SUPPORT_MESH 2553 if (vap->iv_opmode == IEEE80211_M_MBSS) { 2554 frm = ieee80211_add_meshid(frm, vap); 2555 frm = ieee80211_add_meshconf(frm, vap); 2556 } 2557#endif 2558 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2559 2560 return m; 2561} 2562 2563/* 2564 * Send a probe response frame to the specified mac address. 2565 * This does not go through the normal mgt frame api so we 2566 * can specify the destination address and re-use the bss node 2567 * for the sta reference. 2568 */ 2569int 2570ieee80211_send_proberesp(struct ieee80211vap *vap, 2571 const uint8_t da[IEEE80211_ADDR_LEN], int legacy) 2572{ 2573 struct ieee80211_node *bss = vap->iv_bss; 2574 struct ieee80211com *ic = vap->iv_ic; 2575 struct ieee80211_frame *wh; 2576 struct mbuf *m; 2577 int ret; 2578 2579 if (vap->iv_state == IEEE80211_S_CAC) { 2580 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, bss, 2581 "block %s frame in CAC state", "probe response"); 2582 vap->iv_stats.is_tx_badstate++; 2583 return EIO; /* XXX */ 2584 } 2585 2586 /* 2587 * Hold a reference on the node so it doesn't go away until after 2588 * the xmit is complete all the way in the driver. On error we 2589 * will remove our reference. 2590 */ 2591 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2592 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", 2593 __func__, __LINE__, bss, ether_sprintf(bss->ni_macaddr), 2594 ieee80211_node_refcnt(bss)+1); 2595 ieee80211_ref_node(bss); 2596 2597 m = ieee80211_alloc_proberesp(bss, legacy); 2598 if (m == NULL) { 2599 ieee80211_free_node(bss); 2600 return ENOMEM; 2601 } 2602 2603 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); 2604 KASSERT(m != NULL, ("no room for header")); 2605 2606 IEEE80211_TX_LOCK(ic); 2607 wh = mtod(m, struct ieee80211_frame *); 2608 ieee80211_send_setup(bss, m, 2609 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_RESP, 2610 IEEE80211_NONQOS_TID, vap->iv_myaddr, da, bss->ni_bssid); 2611 /* XXX power management? */ 2612 m->m_flags |= M_ENCAP; /* mark encapsulated */ 2613 2614 M_WME_SETAC(m, WME_AC_BE); 2615 2616 IEEE80211_DPRINTF(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS, 2617 "send probe resp on channel %u to %s%s\n", 2618 ieee80211_chan2ieee(ic, ic->ic_curchan), ether_sprintf(da), 2619 legacy ? " <legacy>" : ""); 2620 IEEE80211_NODE_STAT(bss, tx_mgmt); 2621 2622 ret = ieee80211_raw_output(vap, bss, m, NULL); 2623 IEEE80211_TX_UNLOCK(ic); 2624 return (ret); 2625} 2626 2627/* 2628 * Allocate and build a RTS (Request To Send) control frame. 2629 */ 2630struct mbuf * 2631ieee80211_alloc_rts(struct ieee80211com *ic, 2632 const uint8_t ra[IEEE80211_ADDR_LEN], 2633 const uint8_t ta[IEEE80211_ADDR_LEN], 2634 uint16_t dur) 2635{ 2636 struct ieee80211_frame_rts *rts; 2637 struct mbuf *m; 2638 2639 /* XXX honor ic_headroom */ 2640 m = m_gethdr(M_NOWAIT, MT_DATA); 2641 if (m != NULL) { 2642 rts = mtod(m, struct ieee80211_frame_rts *); 2643 rts->i_fc[0] = IEEE80211_FC0_VERSION_0 | 2644 IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_RTS; 2645 rts->i_fc[1] = IEEE80211_FC1_DIR_NODS; 2646 *(u_int16_t *)rts->i_dur = htole16(dur); 2647 IEEE80211_ADDR_COPY(rts->i_ra, ra); 2648 IEEE80211_ADDR_COPY(rts->i_ta, ta); 2649 2650 m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_rts); 2651 } 2652 return m; 2653} 2654 2655/* 2656 * Allocate and build a CTS (Clear To Send) control frame. 2657 */ 2658struct mbuf * 2659ieee80211_alloc_cts(struct ieee80211com *ic, 2660 const uint8_t ra[IEEE80211_ADDR_LEN], uint16_t dur) 2661{ 2662 struct ieee80211_frame_cts *cts; 2663 struct mbuf *m; 2664 2665 /* XXX honor ic_headroom */ 2666 m = m_gethdr(M_NOWAIT, MT_DATA); 2667 if (m != NULL) { 2668 cts = mtod(m, struct ieee80211_frame_cts *); 2669 cts->i_fc[0] = IEEE80211_FC0_VERSION_0 | 2670 IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_CTS; 2671 cts->i_fc[1] = IEEE80211_FC1_DIR_NODS; 2672 *(u_int16_t *)cts->i_dur = htole16(dur); 2673 IEEE80211_ADDR_COPY(cts->i_ra, ra); 2674 2675 m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_cts); 2676 } 2677 return m; 2678} 2679 2680static void 2681ieee80211_tx_mgt_timeout(void *arg) 2682{ 2683 struct ieee80211_node *ni = arg; 2684 struct ieee80211vap *vap = ni->ni_vap; 2685 2686 if (vap->iv_state != IEEE80211_S_INIT && 2687 (vap->iv_ic->ic_flags & IEEE80211_F_SCAN) == 0) { 2688 /* 2689 * NB: it's safe to specify a timeout as the reason here; 2690 * it'll only be used in the right state. 2691 */ 2692 ieee80211_new_state(vap, IEEE80211_S_SCAN, 2693 IEEE80211_SCAN_FAIL_TIMEOUT); 2694 } 2695} 2696 2697static void 2698ieee80211_tx_mgt_cb(struct ieee80211_node *ni, void *arg, int status) 2699{ 2700 struct ieee80211vap *vap = ni->ni_vap; 2701 enum ieee80211_state ostate = (enum ieee80211_state) arg; 2702 2703 /* 2704 * Frame transmit completed; arrange timer callback. If 2705 * transmit was successfuly we wait for response. Otherwise 2706 * we arrange an immediate callback instead of doing the 2707 * callback directly since we don't know what state the driver 2708 * is in (e.g. what locks it is holding). This work should 2709 * not be too time-critical and not happen too often so the 2710 * added overhead is acceptable. 2711 * 2712 * XXX what happens if !acked but response shows up before callback? 2713 */ 2714 if (vap->iv_state == ostate) 2715 callout_reset(&vap->iv_mgtsend, 2716 status == 0 ? IEEE80211_TRANS_WAIT*hz : 0, 2717 ieee80211_tx_mgt_timeout, ni); 2718} 2719 2720static void 2721ieee80211_beacon_construct(struct mbuf *m, uint8_t *frm, 2722 struct ieee80211_beacon_offsets *bo, struct ieee80211_node *ni) 2723{ 2724 struct ieee80211vap *vap = ni->ni_vap; 2725 struct ieee80211com *ic = ni->ni_ic; 2726 struct ieee80211_rateset *rs = &ni->ni_rates; 2727 uint16_t capinfo; 2728 2729 /* 2730 * beacon frame format 2731 * [8] time stamp 2732 * [2] beacon interval 2733 * [2] cabability information 2734 * [tlv] ssid 2735 * [tlv] supported rates 2736 * [3] parameter set (DS) 2737 * [8] CF parameter set (optional) 2738 * [tlv] parameter set (IBSS/TIM) 2739 * [tlv] country (optional) 2740 * [3] power control (optional) 2741 * [5] channel switch announcement (CSA) (optional) 2742 * [tlv] extended rate phy (ERP) 2743 * [tlv] extended supported rates 2744 * [tlv] RSN parameters 2745 * [tlv] HT capabilities 2746 * [tlv] HT information 2747 * XXX Vendor-specific OIDs (e.g. Atheros) 2748 * [tlv] WPA parameters 2749 * [tlv] WME parameters 2750 * [tlv] Vendor OUI HT capabilities (optional) 2751 * [tlv] Vendor OUI HT information (optional) 2752 * [tlv] Atheros capabilities (optional) 2753 * [tlv] TDMA parameters (optional) 2754 * [tlv] Mesh ID (MBSS) 2755 * [tlv] Mesh Conf (MBSS) 2756 * [tlv] application data (optional) 2757 */ 2758 2759 memset(bo, 0, sizeof(*bo)); 2760 2761 memset(frm, 0, 8); /* XXX timestamp is set by hardware/driver */ 2762 frm += 8; 2763 *(uint16_t *)frm = htole16(ni->ni_intval); 2764 frm += 2; 2765 capinfo = ieee80211_getcapinfo(vap, ni->ni_chan); 2766 bo->bo_caps = (uint16_t *)frm; 2767 *(uint16_t *)frm = htole16(capinfo); 2768 frm += 2; 2769 *frm++ = IEEE80211_ELEMID_SSID; 2770 if ((vap->iv_flags & IEEE80211_F_HIDESSID) == 0) { 2771 *frm++ = ni->ni_esslen; 2772 memcpy(frm, ni->ni_essid, ni->ni_esslen); 2773 frm += ni->ni_esslen; 2774 } else 2775 *frm++ = 0; 2776 frm = ieee80211_add_rates(frm, rs); 2777 if (!IEEE80211_IS_CHAN_FHSS(ni->ni_chan)) { 2778 *frm++ = IEEE80211_ELEMID_DSPARMS; 2779 *frm++ = 1; 2780 *frm++ = ieee80211_chan2ieee(ic, ni->ni_chan); 2781 } 2782 if (ic->ic_flags & IEEE80211_F_PCF) { 2783 bo->bo_cfp = frm; 2784 frm = ieee80211_add_cfparms(frm, ic); 2785 } 2786 bo->bo_tim = frm; 2787 if (vap->iv_opmode == IEEE80211_M_IBSS) { 2788 *frm++ = IEEE80211_ELEMID_IBSSPARMS; 2789 *frm++ = 2; 2790 *frm++ = 0; *frm++ = 0; /* TODO: ATIM window */ 2791 bo->bo_tim_len = 0; 2792 } else if (vap->iv_opmode == IEEE80211_M_HOSTAP || 2793 vap->iv_opmode == IEEE80211_M_MBSS) { 2794 /* TIM IE is the same for Mesh and Hostap */ 2795 struct ieee80211_tim_ie *tie = (struct ieee80211_tim_ie *) frm; 2796 2797 tie->tim_ie = IEEE80211_ELEMID_TIM; 2798 tie->tim_len = 4; /* length */ 2799 tie->tim_count = 0; /* DTIM count */ 2800 tie->tim_period = vap->iv_dtim_period; /* DTIM period */ 2801 tie->tim_bitctl = 0; /* bitmap control */ 2802 tie->tim_bitmap[0] = 0; /* Partial Virtual Bitmap */ 2803 frm += sizeof(struct ieee80211_tim_ie); 2804 bo->bo_tim_len = 1; 2805 } 2806 bo->bo_tim_trailer = frm; 2807 if ((vap->iv_flags & IEEE80211_F_DOTH) || 2808 (vap->iv_flags_ext & IEEE80211_FEXT_DOTD)) 2809 frm = ieee80211_add_countryie(frm, ic); 2810 if (vap->iv_flags & IEEE80211_F_DOTH) { 2811 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 2812 frm = ieee80211_add_powerconstraint(frm, vap); 2813 bo->bo_csa = frm; 2814 if (ic->ic_flags & IEEE80211_F_CSAPENDING) 2815 frm = ieee80211_add_csa(frm, vap); 2816 } else 2817 bo->bo_csa = frm; 2818 2819 if (vap->iv_flags & IEEE80211_F_DOTH) { 2820 bo->bo_quiet = frm; 2821 if (IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) && 2822 (vap->iv_flags_ext & IEEE80211_FEXT_DFS)) { 2823 if (vap->iv_quiet) 2824 frm = ieee80211_add_quiet(frm,vap); 2825 } 2826 } else 2827 bo->bo_quiet = frm; 2828 2829 if (IEEE80211_IS_CHAN_ANYG(ni->ni_chan)) { 2830 bo->bo_erp = frm; 2831 frm = ieee80211_add_erp(frm, ic); 2832 } 2833 frm = ieee80211_add_xrates(frm, rs); 2834 if (vap->iv_flags & IEEE80211_F_WPA2) { 2835 if (vap->iv_rsn_ie != NULL) 2836 frm = add_ie(frm, vap->iv_rsn_ie); 2837 /* XXX else complain */ 2838 } 2839 if (IEEE80211_IS_CHAN_HT(ni->ni_chan)) { 2840 frm = ieee80211_add_htcap(frm, ni); 2841 bo->bo_htinfo = frm; 2842 frm = ieee80211_add_htinfo(frm, ni); 2843 } 2844 if (vap->iv_flags & IEEE80211_F_WPA1) { 2845 if (vap->iv_wpa_ie != NULL) 2846 frm = add_ie(frm, vap->iv_wpa_ie); 2847 /* XXX else complain */ 2848 } 2849 if (vap->iv_flags & IEEE80211_F_WME) { 2850 bo->bo_wme = frm; 2851 frm = ieee80211_add_wme_param(frm, &ic->ic_wme); 2852 } 2853 if (IEEE80211_IS_CHAN_HT(ni->ni_chan) && 2854 (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT)) { 2855 frm = ieee80211_add_htcap_vendor(frm, ni); 2856 frm = ieee80211_add_htinfo_vendor(frm, ni); 2857 } 2858#ifdef IEEE80211_SUPPORT_SUPERG 2859 if (vap->iv_flags & IEEE80211_F_ATHEROS) { 2860 bo->bo_ath = frm; 2861 frm = ieee80211_add_athcaps(frm, ni); 2862 } 2863#endif 2864#ifdef IEEE80211_SUPPORT_TDMA 2865 if (vap->iv_caps & IEEE80211_C_TDMA) { 2866 bo->bo_tdma = frm; 2867 frm = ieee80211_add_tdma(frm, vap); 2868 } 2869#endif 2870 if (vap->iv_appie_beacon != NULL) { 2871 bo->bo_appie = frm; 2872 bo->bo_appie_len = vap->iv_appie_beacon->ie_len; 2873 frm = add_appie(frm, vap->iv_appie_beacon); 2874 } 2875#ifdef IEEE80211_SUPPORT_MESH 2876 if (vap->iv_opmode == IEEE80211_M_MBSS) { 2877 frm = ieee80211_add_meshid(frm, vap); 2878 bo->bo_meshconf = frm; 2879 frm = ieee80211_add_meshconf(frm, vap); 2880 } 2881#endif 2882 bo->bo_tim_trailer_len = frm - bo->bo_tim_trailer; 2883 bo->bo_csa_trailer_len = frm - bo->bo_csa; 2884 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2885} 2886 2887/* 2888 * Allocate a beacon frame and fillin the appropriate bits. 2889 */ 2890struct mbuf * 2891ieee80211_beacon_alloc(struct ieee80211_node *ni, 2892 struct ieee80211_beacon_offsets *bo) 2893{ 2894 struct ieee80211vap *vap = ni->ni_vap; 2895 struct ieee80211com *ic = ni->ni_ic; 2896 struct ifnet *ifp = vap->iv_ifp; 2897 struct ieee80211_frame *wh; 2898 struct mbuf *m; 2899 int pktlen; 2900 uint8_t *frm; 2901 2902 /* 2903 * beacon frame format 2904 * [8] time stamp 2905 * [2] beacon interval 2906 * [2] cabability information 2907 * [tlv] ssid 2908 * [tlv] supported rates 2909 * [3] parameter set (DS) 2910 * [8] CF parameter set (optional) 2911 * [tlv] parameter set (IBSS/TIM) 2912 * [tlv] country (optional) 2913 * [3] power control (optional) 2914 * [5] channel switch announcement (CSA) (optional) 2915 * [tlv] extended rate phy (ERP) 2916 * [tlv] extended supported rates 2917 * [tlv] RSN parameters 2918 * [tlv] HT capabilities 2919 * [tlv] HT information 2920 * [tlv] Vendor OUI HT capabilities (optional) 2921 * [tlv] Vendor OUI HT information (optional) 2922 * XXX Vendor-specific OIDs (e.g. Atheros) 2923 * [tlv] WPA parameters 2924 * [tlv] WME parameters 2925 * [tlv] TDMA parameters (optional) 2926 * [tlv] Mesh ID (MBSS) 2927 * [tlv] Mesh Conf (MBSS) 2928 * [tlv] application data (optional) 2929 * NB: we allocate the max space required for the TIM bitmap. 2930 * XXX how big is this? 2931 */ 2932 pktlen = 8 /* time stamp */ 2933 + sizeof(uint16_t) /* beacon interval */ 2934 + sizeof(uint16_t) /* capabilities */ 2935 + 2 + ni->ni_esslen /* ssid */ 2936 + 2 + IEEE80211_RATE_SIZE /* supported rates */ 2937 + 2 + 1 /* DS parameters */ 2938 + 2 + 6 /* CF parameters */ 2939 + 2 + 4 + vap->iv_tim_len /* DTIM/IBSSPARMS */ 2940 + IEEE80211_COUNTRY_MAX_SIZE /* country */ 2941 + 2 + 1 /* power control */ 2942 + sizeof(struct ieee80211_csa_ie) /* CSA */ 2943 + sizeof(struct ieee80211_quiet_ie) /* Quiet */ 2944 + 2 + 1 /* ERP */ 2945 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2946 + (vap->iv_caps & IEEE80211_C_WPA ? /* WPA 1+2 */ 2947 2*sizeof(struct ieee80211_ie_wpa) : 0) 2948 /* XXX conditional? */ 2949 + 4+2*sizeof(struct ieee80211_ie_htcap)/* HT caps */ 2950 + 4+2*sizeof(struct ieee80211_ie_htinfo)/* HT info */ 2951 + (vap->iv_caps & IEEE80211_C_WME ? /* WME */ 2952 sizeof(struct ieee80211_wme_param) : 0) 2953#ifdef IEEE80211_SUPPORT_SUPERG 2954 + sizeof(struct ieee80211_ath_ie) /* ATH */ 2955#endif 2956#ifdef IEEE80211_SUPPORT_TDMA 2957 + (vap->iv_caps & IEEE80211_C_TDMA ? /* TDMA */ 2958 sizeof(struct ieee80211_tdma_param) : 0) 2959#endif 2960#ifdef IEEE80211_SUPPORT_MESH 2961 + 2 + ni->ni_meshidlen 2962 + sizeof(struct ieee80211_meshconf_ie) 2963#endif 2964 + IEEE80211_MAX_APPIE 2965 ; 2966 m = ieee80211_getmgtframe(&frm, 2967 ic->ic_headroom + sizeof(struct ieee80211_frame), pktlen); 2968 if (m == NULL) { 2969 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY, 2970 "%s: cannot get buf; size %u\n", __func__, pktlen); 2971 vap->iv_stats.is_tx_nobuf++; 2972 return NULL; 2973 } 2974 ieee80211_beacon_construct(m, frm, bo, ni); 2975 2976 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); 2977 KASSERT(m != NULL, ("no space for 802.11 header?")); 2978 wh = mtod(m, struct ieee80211_frame *); 2979 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT | 2980 IEEE80211_FC0_SUBTYPE_BEACON; 2981 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 2982 *(uint16_t *)wh->i_dur = 0; 2983 IEEE80211_ADDR_COPY(wh->i_addr1, ifp->if_broadcastaddr); 2984 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); 2985 IEEE80211_ADDR_COPY(wh->i_addr3, ni->ni_bssid); 2986 *(uint16_t *)wh->i_seq = 0; 2987 2988 return m; 2989} 2990 2991/* 2992 * Update the dynamic parts of a beacon frame based on the current state. 2993 */ 2994int 2995ieee80211_beacon_update(struct ieee80211_node *ni, 2996 struct ieee80211_beacon_offsets *bo, struct mbuf *m, int mcast) 2997{ 2998 struct ieee80211vap *vap = ni->ni_vap; 2999 struct ieee80211com *ic = ni->ni_ic; 3000 int len_changed = 0; 3001 uint16_t capinfo; 3002 struct ieee80211_frame *wh; 3003 ieee80211_seq seqno; 3004 3005 IEEE80211_LOCK(ic); 3006 /* 3007 * Handle 11h channel change when we've reached the count. 3008 * We must recalculate the beacon frame contents to account 3009 * for the new channel. Note we do this only for the first 3010 * vap that reaches this point; subsequent vaps just update 3011 * their beacon state to reflect the recalculated channel. 3012 */ 3013 if (isset(bo->bo_flags, IEEE80211_BEACON_CSA) && 3014 vap->iv_csa_count == ic->ic_csa_count) { 3015 vap->iv_csa_count = 0; 3016 /* 3017 * Effect channel change before reconstructing the beacon 3018 * frame contents as many places reference ni_chan. 3019 */ 3020 if (ic->ic_csa_newchan != NULL) 3021 ieee80211_csa_completeswitch(ic); 3022 /* 3023 * NB: ieee80211_beacon_construct clears all pending 3024 * updates in bo_flags so we don't need to explicitly 3025 * clear IEEE80211_BEACON_CSA. 3026 */ 3027 ieee80211_beacon_construct(m, 3028 mtod(m, uint8_t*) + sizeof(struct ieee80211_frame), bo, ni); 3029 3030 /* XXX do WME aggressive mode processing? */ 3031 IEEE80211_UNLOCK(ic); 3032 return 1; /* just assume length changed */ 3033 } 3034 3035 wh = mtod(m, struct ieee80211_frame *); 3036 seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]++; 3037 *(uint16_t *)&wh->i_seq[0] = 3038 htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); 3039 M_SEQNO_SET(m, seqno); 3040 3041 /* XXX faster to recalculate entirely or just changes? */ 3042 capinfo = ieee80211_getcapinfo(vap, ni->ni_chan); 3043 *bo->bo_caps = htole16(capinfo); 3044 3045 if (vap->iv_flags & IEEE80211_F_WME) { 3046 struct ieee80211_wme_state *wme = &ic->ic_wme; 3047 3048 /* 3049 * Check for agressive mode change. When there is 3050 * significant high priority traffic in the BSS 3051 * throttle back BE traffic by using conservative 3052 * parameters. Otherwise BE uses agressive params 3053 * to optimize performance of legacy/non-QoS traffic. 3054 */ 3055 if (wme->wme_flags & WME_F_AGGRMODE) { 3056 if (wme->wme_hipri_traffic > 3057 wme->wme_hipri_switch_thresh) { 3058 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 3059 "%s: traffic %u, disable aggressive mode\n", 3060 __func__, wme->wme_hipri_traffic); 3061 wme->wme_flags &= ~WME_F_AGGRMODE; 3062 ieee80211_wme_updateparams_locked(vap); 3063 wme->wme_hipri_traffic = 3064 wme->wme_hipri_switch_hysteresis; 3065 } else 3066 wme->wme_hipri_traffic = 0; 3067 } else { 3068 if (wme->wme_hipri_traffic <= 3069 wme->wme_hipri_switch_thresh) { 3070 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 3071 "%s: traffic %u, enable aggressive mode\n", 3072 __func__, wme->wme_hipri_traffic); 3073 wme->wme_flags |= WME_F_AGGRMODE; 3074 ieee80211_wme_updateparams_locked(vap); 3075 wme->wme_hipri_traffic = 0; 3076 } else 3077 wme->wme_hipri_traffic = 3078 wme->wme_hipri_switch_hysteresis; 3079 } 3080 if (isset(bo->bo_flags, IEEE80211_BEACON_WME)) { 3081 (void) ieee80211_add_wme_param(bo->bo_wme, wme); 3082 clrbit(bo->bo_flags, IEEE80211_BEACON_WME); 3083 } 3084 } 3085 3086 if (isset(bo->bo_flags, IEEE80211_BEACON_HTINFO)) { 3087 ieee80211_ht_update_beacon(vap, bo); 3088 clrbit(bo->bo_flags, IEEE80211_BEACON_HTINFO); 3089 } 3090#ifdef IEEE80211_SUPPORT_TDMA 3091 if (vap->iv_caps & IEEE80211_C_TDMA) { 3092 /* 3093 * NB: the beacon is potentially updated every TBTT. 3094 */ 3095 ieee80211_tdma_update_beacon(vap, bo); 3096 } 3097#endif 3098#ifdef IEEE80211_SUPPORT_MESH 3099 if (vap->iv_opmode == IEEE80211_M_MBSS) 3100 ieee80211_mesh_update_beacon(vap, bo); 3101#endif 3102 3103 if (vap->iv_opmode == IEEE80211_M_HOSTAP || 3104 vap->iv_opmode == IEEE80211_M_MBSS) { /* NB: no IBSS support*/ 3105 struct ieee80211_tim_ie *tie = 3106 (struct ieee80211_tim_ie *) bo->bo_tim; 3107 if (isset(bo->bo_flags, IEEE80211_BEACON_TIM)) { 3108 u_int timlen, timoff, i; 3109 /* 3110 * ATIM/DTIM needs updating. If it fits in the 3111 * current space allocated then just copy in the 3112 * new bits. Otherwise we need to move any trailing 3113 * data to make room. Note that we know there is 3114 * contiguous space because ieee80211_beacon_allocate 3115 * insures there is space in the mbuf to write a 3116 * maximal-size virtual bitmap (based on iv_max_aid). 3117 */ 3118 /* 3119 * Calculate the bitmap size and offset, copy any 3120 * trailer out of the way, and then copy in the 3121 * new bitmap and update the information element. 3122 * Note that the tim bitmap must contain at least 3123 * one byte and any offset must be even. 3124 */ 3125 if (vap->iv_ps_pending != 0) { 3126 timoff = 128; /* impossibly large */ 3127 for (i = 0; i < vap->iv_tim_len; i++) 3128 if (vap->iv_tim_bitmap[i]) { 3129 timoff = i &~ 1; 3130 break; 3131 } 3132 KASSERT(timoff != 128, ("tim bitmap empty!")); 3133 for (i = vap->iv_tim_len-1; i >= timoff; i--) 3134 if (vap->iv_tim_bitmap[i]) 3135 break; 3136 timlen = 1 + (i - timoff); 3137 } else { 3138 timoff = 0; 3139 timlen = 1; 3140 } 3141 if (timlen != bo->bo_tim_len) { 3142 /* copy up/down trailer */ 3143 int adjust = tie->tim_bitmap+timlen 3144 - bo->bo_tim_trailer; 3145 ovbcopy(bo->bo_tim_trailer, 3146 bo->bo_tim_trailer+adjust, 3147 bo->bo_tim_trailer_len); 3148 bo->bo_tim_trailer += adjust; 3149 bo->bo_erp += adjust; 3150 bo->bo_htinfo += adjust; 3151#ifdef IEEE80211_SUPPORT_SUPERG 3152 bo->bo_ath += adjust; 3153#endif 3154#ifdef IEEE80211_SUPPORT_TDMA 3155 bo->bo_tdma += adjust; 3156#endif 3157#ifdef IEEE80211_SUPPORT_MESH 3158 bo->bo_meshconf += adjust; 3159#endif 3160 bo->bo_appie += adjust; 3161 bo->bo_wme += adjust; 3162 bo->bo_csa += adjust; 3163 bo->bo_quiet += adjust; 3164 bo->bo_tim_len = timlen; 3165 3166 /* update information element */ 3167 tie->tim_len = 3 + timlen; 3168 tie->tim_bitctl = timoff; 3169 len_changed = 1; 3170 } 3171 memcpy(tie->tim_bitmap, vap->iv_tim_bitmap + timoff, 3172 bo->bo_tim_len); 3173 3174 clrbit(bo->bo_flags, IEEE80211_BEACON_TIM); 3175 3176 IEEE80211_DPRINTF(vap, IEEE80211_MSG_POWER, 3177 "%s: TIM updated, pending %u, off %u, len %u\n", 3178 __func__, vap->iv_ps_pending, timoff, timlen); 3179 } 3180 /* count down DTIM period */ 3181 if (tie->tim_count == 0) 3182 tie->tim_count = tie->tim_period - 1; 3183 else 3184 tie->tim_count--; 3185 /* update state for buffered multicast frames on DTIM */ 3186 if (mcast && tie->tim_count == 0) 3187 tie->tim_bitctl |= 1; 3188 else 3189 tie->tim_bitctl &= ~1; 3190 if (isset(bo->bo_flags, IEEE80211_BEACON_CSA)) { 3191 struct ieee80211_csa_ie *csa = 3192 (struct ieee80211_csa_ie *) bo->bo_csa; 3193 3194 /* 3195 * Insert or update CSA ie. If we're just starting 3196 * to count down to the channel switch then we need 3197 * to insert the CSA ie. Otherwise we just need to 3198 * drop the count. The actual change happens above 3199 * when the vap's count reaches the target count. 3200 */ 3201 if (vap->iv_csa_count == 0) { 3202 memmove(&csa[1], csa, bo->bo_csa_trailer_len); 3203 bo->bo_erp += sizeof(*csa); 3204 bo->bo_htinfo += sizeof(*csa); 3205 bo->bo_wme += sizeof(*csa); 3206#ifdef IEEE80211_SUPPORT_SUPERG 3207 bo->bo_ath += sizeof(*csa); 3208#endif 3209#ifdef IEEE80211_SUPPORT_TDMA 3210 bo->bo_tdma += sizeof(*csa); 3211#endif 3212#ifdef IEEE80211_SUPPORT_MESH 3213 bo->bo_meshconf += sizeof(*csa); 3214#endif 3215 bo->bo_appie += sizeof(*csa); 3216 bo->bo_csa_trailer_len += sizeof(*csa); 3217 bo->bo_quiet += sizeof(*csa); 3218 bo->bo_tim_trailer_len += sizeof(*csa); 3219 m->m_len += sizeof(*csa); 3220 m->m_pkthdr.len += sizeof(*csa); 3221 3222 ieee80211_add_csa(bo->bo_csa, vap); 3223 } else 3224 csa->csa_count--; 3225 vap->iv_csa_count++; 3226 /* NB: don't clear IEEE80211_BEACON_CSA */ 3227 } 3228 if (IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) && 3229 (vap->iv_flags_ext & IEEE80211_FEXT_DFS) ){ 3230 if (vap->iv_quiet) 3231 ieee80211_add_quiet(bo->bo_quiet, vap); 3232 } 3233 if (isset(bo->bo_flags, IEEE80211_BEACON_ERP)) { 3234 /* 3235 * ERP element needs updating. 3236 */ 3237 (void) ieee80211_add_erp(bo->bo_erp, ic); 3238 clrbit(bo->bo_flags, IEEE80211_BEACON_ERP); 3239 } 3240#ifdef IEEE80211_SUPPORT_SUPERG 3241 if (isset(bo->bo_flags, IEEE80211_BEACON_ATH)) { 3242 ieee80211_add_athcaps(bo->bo_ath, ni); 3243 clrbit(bo->bo_flags, IEEE80211_BEACON_ATH); 3244 } 3245#endif 3246 } 3247 if (isset(bo->bo_flags, IEEE80211_BEACON_APPIE)) { 3248 const struct ieee80211_appie *aie = vap->iv_appie_beacon; 3249 int aielen; 3250 uint8_t *frm; 3251 3252 aielen = 0; 3253 if (aie != NULL) 3254 aielen += aie->ie_len; 3255 if (aielen != bo->bo_appie_len) { 3256 /* copy up/down trailer */ 3257 int adjust = aielen - bo->bo_appie_len; 3258 ovbcopy(bo->bo_tim_trailer, bo->bo_tim_trailer+adjust, 3259 bo->bo_tim_trailer_len); 3260 bo->bo_tim_trailer += adjust; 3261 bo->bo_appie += adjust; 3262 bo->bo_appie_len = aielen; 3263 3264 len_changed = 1; 3265 } 3266 frm = bo->bo_appie; 3267 if (aie != NULL) 3268 frm = add_appie(frm, aie); 3269 clrbit(bo->bo_flags, IEEE80211_BEACON_APPIE); 3270 } 3271 IEEE80211_UNLOCK(ic); 3272 3273 return len_changed; 3274} 3275