ieee80211_output.c revision 254076
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 254076 2013-08-07 22:01:43Z adrian $"); 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 * Transmit a frame to the given destination on the given VAP. 114 * 115 * It's up to the caller to figure out the details of who this 116 * is going to and resolving the node. 117 * 118 * This routine takes care of queuing it for power save, 119 * A-MPDU state stuff, fast-frames state stuff, encapsulation 120 * if required, then passing it up to the driver layer. 121 * 122 * This routine (for now) consumes the mbuf and frees the node 123 * reference; it ideally will return a TX status which reflects 124 * whether the mbuf was consumed or not, so the caller can 125 * free the mbuf (if appropriate) and the node reference (again, 126 * if appropriate.) 127 */ 128int 129ieee80211_vap_pkt_send_dest(struct ieee80211vap *vap, struct mbuf *m, 130 struct ieee80211_node *ni) 131{ 132 struct ieee80211com *ic = vap->iv_ic; 133 struct ifnet *ifp = vap->iv_ifp; 134 int error; 135 136 if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) && 137 (m->m_flags & M_PWR_SAV) == 0) { 138 /* 139 * Station in power save mode; pass the frame 140 * to the 802.11 layer and continue. We'll get 141 * the frame back when the time is right. 142 * XXX lose WDS vap linkage? 143 */ 144 (void) ieee80211_pwrsave(ni, m); 145 ieee80211_free_node(ni); 146 /* XXX better status? */ 147 return (ENOBUFS); 148 } 149 /* calculate priority so drivers can find the tx queue */ 150 if (ieee80211_classify(ni, m)) { 151 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_OUTPUT, 152 ni->ni_macaddr, NULL, 153 "%s", "classification failure"); 154 vap->iv_stats.is_tx_classify++; 155 ifp->if_oerrors++; 156 m_freem(m); 157 ieee80211_free_node(ni); 158 /* XXX better status? */ 159 return (ENOBUFS); 160 } 161 /* 162 * Stash the node pointer. Note that we do this after 163 * any call to ieee80211_dwds_mcast because that code 164 * uses any existing value for rcvif to identify the 165 * interface it (might have been) received on. 166 */ 167 m->m_pkthdr.rcvif = (void *)ni; 168 169 BPF_MTAP(ifp, m); /* 802.3 tx */ 170 171 172 /* 173 * Check if A-MPDU tx aggregation is setup or if we 174 * should try to enable it. The sta must be associated 175 * with HT and A-MPDU enabled for use. When the policy 176 * routine decides we should enable A-MPDU we issue an 177 * ADDBA request and wait for a reply. The frame being 178 * encapsulated will go out w/o using A-MPDU, or possibly 179 * it might be collected by the driver and held/retransmit. 180 * The default ic_ampdu_enable routine handles staggering 181 * ADDBA requests in case the receiver NAK's us or we are 182 * otherwise unable to establish a BA stream. 183 */ 184 if ((ni->ni_flags & IEEE80211_NODE_AMPDU_TX) && 185 (vap->iv_flags_ht & IEEE80211_FHT_AMPDU_TX) && 186 (m->m_flags & M_EAPOL) == 0) { 187 int tid = WME_AC_TO_TID(M_WME_GETAC(m)); 188 struct ieee80211_tx_ampdu *tap = &ni->ni_tx_ampdu[tid]; 189 190 ieee80211_txampdu_count_packet(tap); 191 if (IEEE80211_AMPDU_RUNNING(tap)) { 192 /* 193 * Operational, mark frame for aggregation. 194 * 195 * XXX do tx aggregation here 196 */ 197 m->m_flags |= M_AMPDU_MPDU; 198 } else if (!IEEE80211_AMPDU_REQUESTED(tap) && 199 ic->ic_ampdu_enable(ni, tap)) { 200 /* 201 * Not negotiated yet, request service. 202 */ 203 ieee80211_ampdu_request(ni, tap); 204 /* XXX hold frame for reply? */ 205 } 206 } 207 208#ifdef IEEE80211_SUPPORT_SUPERG 209 else if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF)) { 210 m = ieee80211_ff_check(ni, m); 211 if (m == NULL) { 212 /* NB: any ni ref held on stageq */ 213 /* XXX better status? */ 214 return (ENOBUFS); 215 } 216 } 217#endif /* IEEE80211_SUPPORT_SUPERG */ 218 219 /* 220 * Grab the TX lock - serialise the TX process from this 221 * point (where TX state is being checked/modified) 222 * through to driver queue. 223 */ 224 IEEE80211_TX_LOCK(ic); 225 226 if (__predict_true((vap->iv_caps & IEEE80211_C_8023ENCAP) == 0)) { 227 /* 228 * Encapsulate the packet in prep for transmission. 229 */ 230 m = ieee80211_encap(vap, ni, m); 231 if (m == NULL) { 232 /* NB: stat+msg handled in ieee80211_encap */ 233 IEEE80211_TX_UNLOCK(ic); 234 ieee80211_free_node(ni); 235 /* XXX better status? */ 236 return (ENOBUFS); 237 } 238 } 239 error = ieee80211_parent_transmit(ic, m); 240 241 /* 242 * Unlock at this point - no need to hold it across 243 * ieee80211_free_node() (ie, the comlock) 244 */ 245 IEEE80211_TX_UNLOCK(ic); 246 if (error != 0) { 247 /* NB: IFQ_HANDOFF reclaims mbuf */ 248 ieee80211_free_node(ni); 249 } else { 250 ifp->if_opackets++; 251 } 252 ic->ic_lastdata = ticks; 253 254 return (0); 255} 256 257 258 259/* 260 * Send the given mbuf through the given vap. 261 * 262 * This consumes the mbuf regardless of whether the transmit 263 * was successful or not. 264 * 265 * This does none of the initial checks that ieee80211_start() 266 * does (eg CAC timeout, interface wakeup) - the caller must 267 * do this first. 268 */ 269static int 270ieee80211_start_pkt(struct ieee80211vap *vap, struct mbuf *m) 271{ 272#define IS_DWDS(vap) \ 273 (vap->iv_opmode == IEEE80211_M_WDS && \ 274 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) == 0) 275 struct ieee80211com *ic = vap->iv_ic; 276 struct ifnet *ifp = vap->iv_ifp; 277 struct ieee80211_node *ni; 278 struct ether_header *eh; 279 280 /* 281 * Cancel any background scan. 282 */ 283 if (ic->ic_flags & IEEE80211_F_SCAN) 284 ieee80211_cancel_anyscan(vap); 285 /* 286 * Find the node for the destination so we can do 287 * things like power save and fast frames aggregation. 288 * 289 * NB: past this point various code assumes the first 290 * mbuf has the 802.3 header present (and contiguous). 291 */ 292 ni = NULL; 293 if (m->m_len < sizeof(struct ether_header) && 294 (m = m_pullup(m, sizeof(struct ether_header))) == NULL) { 295 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 296 "discard frame, %s\n", "m_pullup failed"); 297 vap->iv_stats.is_tx_nobuf++; /* XXX */ 298 ifp->if_oerrors++; 299 return (ENOBUFS); 300 } 301 eh = mtod(m, struct ether_header *); 302 if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 303 if (IS_DWDS(vap)) { 304 /* 305 * Only unicast frames from the above go out 306 * DWDS vaps; multicast frames are handled by 307 * dispatching the frame as it comes through 308 * the AP vap (see below). 309 */ 310 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_WDS, 311 eh->ether_dhost, "mcast", "%s", "on DWDS"); 312 vap->iv_stats.is_dwds_mcast++; 313 m_freem(m); 314 /* XXX better status? */ 315 return (ENOBUFS); 316 } 317 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 318 /* 319 * Spam DWDS vap's w/ multicast traffic. 320 */ 321 /* XXX only if dwds in use? */ 322 ieee80211_dwds_mcast(vap, m); 323 } 324 } 325#ifdef IEEE80211_SUPPORT_MESH 326 if (vap->iv_opmode != IEEE80211_M_MBSS) { 327#endif 328 ni = ieee80211_find_txnode(vap, eh->ether_dhost); 329 if (ni == NULL) { 330 /* NB: ieee80211_find_txnode does stat+msg */ 331 ifp->if_oerrors++; 332 m_freem(m); 333 /* XXX better status? */ 334 return (ENOBUFS); 335 } 336 if (ni->ni_associd == 0 && 337 (ni->ni_flags & IEEE80211_NODE_ASSOCID)) { 338 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_OUTPUT, 339 eh->ether_dhost, NULL, 340 "sta not associated (type 0x%04x)", 341 htons(eh->ether_type)); 342 vap->iv_stats.is_tx_notassoc++; 343 ifp->if_oerrors++; 344 m_freem(m); 345 ieee80211_free_node(ni); 346 /* XXX better status? */ 347 return (ENOBUFS); 348 } 349#ifdef IEEE80211_SUPPORT_MESH 350 } else { 351 if (!IEEE80211_ADDR_EQ(eh->ether_shost, vap->iv_myaddr)) { 352 /* 353 * Proxy station only if configured. 354 */ 355 if (!ieee80211_mesh_isproxyena(vap)) { 356 IEEE80211_DISCARD_MAC(vap, 357 IEEE80211_MSG_OUTPUT | 358 IEEE80211_MSG_MESH, 359 eh->ether_dhost, NULL, 360 "%s", "proxy not enabled"); 361 vap->iv_stats.is_mesh_notproxy++; 362 ifp->if_oerrors++; 363 m_freem(m); 364 /* XXX better status? */ 365 return (ENOBUFS); 366 } 367 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 368 "forward frame from DS SA(%6D), DA(%6D)\n", 369 eh->ether_shost, ":", 370 eh->ether_dhost, ":"); 371 ieee80211_mesh_proxy_check(vap, eh->ether_shost); 372 } 373 ni = ieee80211_mesh_discover(vap, eh->ether_dhost, m); 374 if (ni == NULL) { 375 /* 376 * NB: ieee80211_mesh_discover holds/disposes 377 * frame (e.g. queueing on path discovery). 378 */ 379 ifp->if_oerrors++; 380 /* XXX better status? */ 381 return (ENOBUFS); 382 } 383 } 384#endif 385 386 /* 387 * We've resolved the sender, so attempt to transmit it. 388 */ 389 if (ieee80211_vap_pkt_send_dest(vap, m, ni) != 0) 390 return (ENOBUFS); 391 return (0); 392#undef IS_DWDS 393} 394 395/* 396 * Start method for vap's. All packets from the stack come 397 * through here. We handle common processing of the packets 398 * before dispatching them to the underlying device. 399 */ 400void 401ieee80211_start(struct ifnet *ifp) 402{ 403 struct ieee80211vap *vap = ifp->if_softc; 404 struct ieee80211com *ic = vap->iv_ic; 405 struct ifnet *parent = ic->ic_ifp; 406 struct mbuf *m; 407 408 /* NB: parent must be up and running */ 409 if (!IFNET_IS_UP_RUNNING(parent)) { 410 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 411 "%s: ignore queue, parent %s not up+running\n", 412 __func__, parent->if_xname); 413 /* XXX stat */ 414 return; 415 } 416 if (vap->iv_state == IEEE80211_S_SLEEP) { 417 /* 418 * In power save, wakeup device for transmit. 419 */ 420 ieee80211_new_state(vap, IEEE80211_S_RUN, 0); 421 return; 422 } 423 /* 424 * No data frames go out unless we're running. 425 * Note in particular this covers CAC and CSA 426 * states (though maybe we should check muting 427 * for CSA). 428 */ 429 if (vap->iv_state != IEEE80211_S_RUN) { 430 IEEE80211_LOCK(ic); 431 /* re-check under the com lock to avoid races */ 432 if (vap->iv_state != IEEE80211_S_RUN) { 433 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 434 "%s: ignore queue, in %s state\n", 435 __func__, ieee80211_state_name[vap->iv_state]); 436 vap->iv_stats.is_tx_badstate++; 437 IEEE80211_UNLOCK(ic); 438 IFQ_LOCK(&ifp->if_snd); 439 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 440 IFQ_UNLOCK(&ifp->if_snd); 441 return; 442 } 443 IEEE80211_UNLOCK(ic); 444 } 445 446 for (;;) { 447 IFQ_DEQUEUE(&ifp->if_snd, m); 448 if (m == NULL) 449 break; 450 /* 451 * Sanitize mbuf flags for net80211 use. We cannot 452 * clear M_PWR_SAV or M_MORE_DATA because these may 453 * be set for frames that are re-submitted from the 454 * power save queue. 455 * 456 * NB: This must be done before ieee80211_classify as 457 * it marks EAPOL in frames with M_EAPOL. 458 */ 459 m->m_flags &= ~(M_80211_TX - M_PWR_SAV - M_MORE_DATA); 460 /* 461 * Bump to the packet transmission path. 462 */ 463 (void) ieee80211_start_pkt(vap, m); 464 /* mbuf is consumed here */ 465 } 466} 467 468/* 469 * 802.11 raw output routine. 470 */ 471int 472ieee80211_raw_output(struct ieee80211vap *vap, struct ieee80211_node *ni, 473 struct mbuf *m, const struct ieee80211_bpf_params *params) 474{ 475 struct ieee80211com *ic = vap->iv_ic; 476 477 return (ic->ic_raw_xmit(ni, m, params)); 478} 479 480/* 481 * 802.11 output routine. This is (currently) used only to 482 * connect bpf write calls to the 802.11 layer for injecting 483 * raw 802.11 frames. 484 */ 485#if __FreeBSD_version >= 1000031 486int 487ieee80211_output(struct ifnet *ifp, struct mbuf *m, 488 const struct sockaddr *dst, struct route *ro) 489#else 490int 491ieee80211_output(struct ifnet *ifp, struct mbuf *m, 492 struct sockaddr *dst, struct route *ro) 493#endif 494{ 495#define senderr(e) do { error = (e); goto bad;} while (0) 496 struct ieee80211_node *ni = NULL; 497 struct ieee80211vap *vap; 498 struct ieee80211_frame *wh; 499 struct ieee80211com *ic = NULL; 500 int error; 501 int ret; 502 503 IFQ_LOCK(&ifp->if_snd); 504 if (ifp->if_drv_flags & IFF_DRV_OACTIVE) { 505 IFQ_UNLOCK(&ifp->if_snd); 506 /* 507 * Short-circuit requests if the vap is marked OACTIVE 508 * as this can happen because a packet came down through 509 * ieee80211_start before the vap entered RUN state in 510 * which case it's ok to just drop the frame. This 511 * should not be necessary but callers of if_output don't 512 * check OACTIVE. 513 */ 514 senderr(ENETDOWN); 515 } 516 IFQ_UNLOCK(&ifp->if_snd); 517 vap = ifp->if_softc; 518 ic = vap->iv_ic; 519 /* 520 * Hand to the 802.3 code if not tagged as 521 * a raw 802.11 frame. 522 */ 523 if (dst->sa_family != AF_IEEE80211) 524 return vap->iv_output(ifp, m, dst, ro); 525#ifdef MAC 526 error = mac_ifnet_check_transmit(ifp, m); 527 if (error) 528 senderr(error); 529#endif 530 if (ifp->if_flags & IFF_MONITOR) 531 senderr(ENETDOWN); 532 if (!IFNET_IS_UP_RUNNING(ifp)) 533 senderr(ENETDOWN); 534 if (vap->iv_state == IEEE80211_S_CAC) { 535 IEEE80211_DPRINTF(vap, 536 IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH, 537 "block %s frame in CAC state\n", "raw data"); 538 vap->iv_stats.is_tx_badstate++; 539 senderr(EIO); /* XXX */ 540 } else if (vap->iv_state == IEEE80211_S_SCAN) 541 senderr(EIO); 542 /* XXX bypass bridge, pfil, carp, etc. */ 543 544 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_ack)) 545 senderr(EIO); /* XXX */ 546 wh = mtod(m, struct ieee80211_frame *); 547 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 548 IEEE80211_FC0_VERSION_0) 549 senderr(EIO); /* XXX */ 550 551 /* locate destination node */ 552 switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) { 553 case IEEE80211_FC1_DIR_NODS: 554 case IEEE80211_FC1_DIR_FROMDS: 555 ni = ieee80211_find_txnode(vap, wh->i_addr1); 556 break; 557 case IEEE80211_FC1_DIR_TODS: 558 case IEEE80211_FC1_DIR_DSTODS: 559 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) 560 senderr(EIO); /* XXX */ 561 ni = ieee80211_find_txnode(vap, wh->i_addr3); 562 break; 563 default: 564 senderr(EIO); /* XXX */ 565 } 566 if (ni == NULL) { 567 /* 568 * Permit packets w/ bpf params through regardless 569 * (see below about sa_len). 570 */ 571 if (dst->sa_len == 0) 572 senderr(EHOSTUNREACH); 573 ni = ieee80211_ref_node(vap->iv_bss); 574 } 575 576 /* 577 * Sanitize mbuf for net80211 flags leaked from above. 578 * 579 * NB: This must be done before ieee80211_classify as 580 * it marks EAPOL in frames with M_EAPOL. 581 */ 582 m->m_flags &= ~M_80211_TX; 583 584 /* calculate priority so drivers can find the tx queue */ 585 /* XXX assumes an 802.3 frame */ 586 if (ieee80211_classify(ni, m)) 587 senderr(EIO); /* XXX */ 588 589 ifp->if_opackets++; 590 IEEE80211_NODE_STAT(ni, tx_data); 591 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 592 IEEE80211_NODE_STAT(ni, tx_mcast); 593 m->m_flags |= M_MCAST; 594 } else 595 IEEE80211_NODE_STAT(ni, tx_ucast); 596 /* NB: ieee80211_encap does not include 802.11 header */ 597 IEEE80211_NODE_STAT_ADD(ni, tx_bytes, m->m_pkthdr.len); 598 599 IEEE80211_TX_LOCK(ic); 600 601 /* 602 * NB: DLT_IEEE802_11_RADIO identifies the parameters are 603 * present by setting the sa_len field of the sockaddr (yes, 604 * this is a hack). 605 * NB: we assume sa_data is suitably aligned to cast. 606 */ 607 ret = ieee80211_raw_output(vap, ni, m, 608 (const struct ieee80211_bpf_params *)(dst->sa_len ? 609 dst->sa_data : NULL)); 610 IEEE80211_TX_UNLOCK(ic); 611 return (ret); 612bad: 613 if (m != NULL) 614 m_freem(m); 615 if (ni != NULL) 616 ieee80211_free_node(ni); 617 ifp->if_oerrors++; 618 return error; 619#undef senderr 620} 621 622/* 623 * Set the direction field and address fields of an outgoing 624 * frame. Note this should be called early on in constructing 625 * a frame as it sets i_fc[1]; other bits can then be or'd in. 626 */ 627void 628ieee80211_send_setup( 629 struct ieee80211_node *ni, 630 struct mbuf *m, 631 int type, int tid, 632 const uint8_t sa[IEEE80211_ADDR_LEN], 633 const uint8_t da[IEEE80211_ADDR_LEN], 634 const uint8_t bssid[IEEE80211_ADDR_LEN]) 635{ 636#define WH4(wh) ((struct ieee80211_frame_addr4 *)wh) 637 struct ieee80211vap *vap = ni->ni_vap; 638 struct ieee80211_tx_ampdu *tap; 639 struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *); 640 ieee80211_seq seqno; 641 642 IEEE80211_TX_LOCK_ASSERT(ni->ni_ic); 643 644 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | type; 645 if ((type & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_DATA) { 646 switch (vap->iv_opmode) { 647 case IEEE80211_M_STA: 648 wh->i_fc[1] = IEEE80211_FC1_DIR_TODS; 649 IEEE80211_ADDR_COPY(wh->i_addr1, bssid); 650 IEEE80211_ADDR_COPY(wh->i_addr2, sa); 651 IEEE80211_ADDR_COPY(wh->i_addr3, da); 652 break; 653 case IEEE80211_M_IBSS: 654 case IEEE80211_M_AHDEMO: 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 IEEE80211_ADDR_COPY(wh->i_addr3, bssid); 659 break; 660 case IEEE80211_M_HOSTAP: 661 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS; 662 IEEE80211_ADDR_COPY(wh->i_addr1, da); 663 IEEE80211_ADDR_COPY(wh->i_addr2, bssid); 664 IEEE80211_ADDR_COPY(wh->i_addr3, sa); 665 break; 666 case IEEE80211_M_WDS: 667 wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS; 668 IEEE80211_ADDR_COPY(wh->i_addr1, da); 669 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); 670 IEEE80211_ADDR_COPY(wh->i_addr3, da); 671 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, sa); 672 break; 673 case IEEE80211_M_MBSS: 674#ifdef IEEE80211_SUPPORT_MESH 675 if (IEEE80211_IS_MULTICAST(da)) { 676 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS; 677 /* XXX next hop */ 678 IEEE80211_ADDR_COPY(wh->i_addr1, da); 679 IEEE80211_ADDR_COPY(wh->i_addr2, 680 vap->iv_myaddr); 681 } else { 682 wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS; 683 IEEE80211_ADDR_COPY(wh->i_addr1, da); 684 IEEE80211_ADDR_COPY(wh->i_addr2, 685 vap->iv_myaddr); 686 IEEE80211_ADDR_COPY(wh->i_addr3, da); 687 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, sa); 688 } 689#endif 690 break; 691 case IEEE80211_M_MONITOR: /* NB: to quiet compiler */ 692 break; 693 } 694 } else { 695 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 696 IEEE80211_ADDR_COPY(wh->i_addr1, da); 697 IEEE80211_ADDR_COPY(wh->i_addr2, sa); 698#ifdef IEEE80211_SUPPORT_MESH 699 if (vap->iv_opmode == IEEE80211_M_MBSS) 700 IEEE80211_ADDR_COPY(wh->i_addr3, sa); 701 else 702#endif 703 IEEE80211_ADDR_COPY(wh->i_addr3, bssid); 704 } 705 *(uint16_t *)&wh->i_dur[0] = 0; 706 707 tap = &ni->ni_tx_ampdu[tid]; 708 if (tid != IEEE80211_NONQOS_TID && IEEE80211_AMPDU_RUNNING(tap)) 709 m->m_flags |= M_AMPDU_MPDU; 710 else { 711 seqno = ni->ni_txseqs[tid]++; 712 *(uint16_t *)&wh->i_seq[0] = 713 htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); 714 M_SEQNO_SET(m, seqno); 715 } 716 717 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) 718 m->m_flags |= M_MCAST; 719#undef WH4 720} 721 722/* 723 * Send a management frame to the specified node. The node pointer 724 * must have a reference as the pointer will be passed to the driver 725 * and potentially held for a long time. If the frame is successfully 726 * dispatched to the driver, then it is responsible for freeing the 727 * reference (and potentially free'ing up any associated storage); 728 * otherwise deal with reclaiming any reference (on error). 729 */ 730int 731ieee80211_mgmt_output(struct ieee80211_node *ni, struct mbuf *m, int type, 732 struct ieee80211_bpf_params *params) 733{ 734 struct ieee80211vap *vap = ni->ni_vap; 735 struct ieee80211com *ic = ni->ni_ic; 736 struct ieee80211_frame *wh; 737 int ret; 738 739 KASSERT(ni != NULL, ("null node")); 740 741 if (vap->iv_state == IEEE80211_S_CAC) { 742 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH, 743 ni, "block %s frame in CAC state", 744 ieee80211_mgt_subtype_name[ 745 (type & IEEE80211_FC0_SUBTYPE_MASK) >> 746 IEEE80211_FC0_SUBTYPE_SHIFT]); 747 vap->iv_stats.is_tx_badstate++; 748 ieee80211_free_node(ni); 749 m_freem(m); 750 return EIO; /* XXX */ 751 } 752 753 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); 754 if (m == NULL) { 755 ieee80211_free_node(ni); 756 return ENOMEM; 757 } 758 759 IEEE80211_TX_LOCK(ic); 760 761 wh = mtod(m, struct ieee80211_frame *); 762 ieee80211_send_setup(ni, m, 763 IEEE80211_FC0_TYPE_MGT | type, IEEE80211_NONQOS_TID, 764 vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid); 765 if (params->ibp_flags & IEEE80211_BPF_CRYPTO) { 766 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr1, 767 "encrypting frame (%s)", __func__); 768 wh->i_fc[1] |= IEEE80211_FC1_WEP; 769 } 770 m->m_flags |= M_ENCAP; /* mark encapsulated */ 771 772 KASSERT(type != IEEE80211_FC0_SUBTYPE_PROBE_RESP, ("probe response?")); 773 M_WME_SETAC(m, params->ibp_pri); 774 775#ifdef IEEE80211_DEBUG 776 /* avoid printing too many frames */ 777 if ((ieee80211_msg_debug(vap) && doprint(vap, type)) || 778 ieee80211_msg_dumppkts(vap)) { 779 printf("[%s] send %s on channel %u\n", 780 ether_sprintf(wh->i_addr1), 781 ieee80211_mgt_subtype_name[ 782 (type & IEEE80211_FC0_SUBTYPE_MASK) >> 783 IEEE80211_FC0_SUBTYPE_SHIFT], 784 ieee80211_chan2ieee(ic, ic->ic_curchan)); 785 } 786#endif 787 IEEE80211_NODE_STAT(ni, tx_mgmt); 788 789 ret = ieee80211_raw_output(vap, ni, m, params); 790 IEEE80211_TX_UNLOCK(ic); 791 return (ret); 792} 793 794/* 795 * Send a null data frame to the specified node. If the station 796 * is setup for QoS then a QoS Null Data frame is constructed. 797 * If this is a WDS station then a 4-address frame is constructed. 798 * 799 * NB: the caller is assumed to have setup a node reference 800 * for use; this is necessary to deal with a race condition 801 * when probing for inactive stations. Like ieee80211_mgmt_output 802 * we must cleanup any node reference on error; however we 803 * can safely just unref it as we know it will never be the 804 * last reference to the node. 805 */ 806int 807ieee80211_send_nulldata(struct ieee80211_node *ni) 808{ 809 struct ieee80211vap *vap = ni->ni_vap; 810 struct ieee80211com *ic = ni->ni_ic; 811 struct mbuf *m; 812 struct ieee80211_frame *wh; 813 int hdrlen; 814 uint8_t *frm; 815 int ret; 816 817 if (vap->iv_state == IEEE80211_S_CAC) { 818 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH, 819 ni, "block %s frame in CAC state", "null data"); 820 ieee80211_unref_node(&ni); 821 vap->iv_stats.is_tx_badstate++; 822 return EIO; /* XXX */ 823 } 824 825 if (ni->ni_flags & (IEEE80211_NODE_QOS|IEEE80211_NODE_HT)) 826 hdrlen = sizeof(struct ieee80211_qosframe); 827 else 828 hdrlen = sizeof(struct ieee80211_frame); 829 /* NB: only WDS vap's get 4-address frames */ 830 if (vap->iv_opmode == IEEE80211_M_WDS) 831 hdrlen += IEEE80211_ADDR_LEN; 832 if (ic->ic_flags & IEEE80211_F_DATAPAD) 833 hdrlen = roundup(hdrlen, sizeof(uint32_t)); 834 835 m = ieee80211_getmgtframe(&frm, ic->ic_headroom + hdrlen, 0); 836 if (m == NULL) { 837 /* XXX debug msg */ 838 ieee80211_unref_node(&ni); 839 vap->iv_stats.is_tx_nobuf++; 840 return ENOMEM; 841 } 842 KASSERT(M_LEADINGSPACE(m) >= hdrlen, 843 ("leading space %zd", M_LEADINGSPACE(m))); 844 M_PREPEND(m, hdrlen, M_NOWAIT); 845 if (m == NULL) { 846 /* NB: cannot happen */ 847 ieee80211_free_node(ni); 848 return ENOMEM; 849 } 850 851 IEEE80211_TX_LOCK(ic); 852 853 wh = mtod(m, struct ieee80211_frame *); /* NB: a little lie */ 854 if (ni->ni_flags & IEEE80211_NODE_QOS) { 855 const int tid = WME_AC_TO_TID(WME_AC_BE); 856 uint8_t *qos; 857 858 ieee80211_send_setup(ni, m, 859 IEEE80211_FC0_TYPE_DATA | IEEE80211_FC0_SUBTYPE_QOS_NULL, 860 tid, vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid); 861 862 if (vap->iv_opmode == IEEE80211_M_WDS) 863 qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos; 864 else 865 qos = ((struct ieee80211_qosframe *) wh)->i_qos; 866 qos[0] = tid & IEEE80211_QOS_TID; 867 if (ic->ic_wme.wme_wmeChanParams.cap_wmeParams[WME_AC_BE].wmep_noackPolicy) 868 qos[0] |= IEEE80211_QOS_ACKPOLICY_NOACK; 869 qos[1] = 0; 870 } else { 871 ieee80211_send_setup(ni, m, 872 IEEE80211_FC0_TYPE_DATA | IEEE80211_FC0_SUBTYPE_NODATA, 873 IEEE80211_NONQOS_TID, 874 vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid); 875 } 876 if (vap->iv_opmode != IEEE80211_M_WDS) { 877 /* NB: power management bit is never sent by an AP */ 878 if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) && 879 vap->iv_opmode != IEEE80211_M_HOSTAP) 880 wh->i_fc[1] |= IEEE80211_FC1_PWR_MGT; 881 } 882 m->m_len = m->m_pkthdr.len = hdrlen; 883 m->m_flags |= M_ENCAP; /* mark encapsulated */ 884 885 M_WME_SETAC(m, WME_AC_BE); 886 887 IEEE80211_NODE_STAT(ni, tx_data); 888 889 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS, ni, 890 "send %snull data frame on channel %u, pwr mgt %s", 891 ni->ni_flags & IEEE80211_NODE_QOS ? "QoS " : "", 892 ieee80211_chan2ieee(ic, ic->ic_curchan), 893 wh->i_fc[1] & IEEE80211_FC1_PWR_MGT ? "ena" : "dis"); 894 895 ret = ieee80211_raw_output(vap, ni, m, NULL); 896 IEEE80211_TX_UNLOCK(ic); 897 return (ret); 898} 899 900/* 901 * Assign priority to a frame based on any vlan tag assigned 902 * to the station and/or any Diffserv setting in an IP header. 903 * Finally, if an ACM policy is setup (in station mode) it's 904 * applied. 905 */ 906int 907ieee80211_classify(struct ieee80211_node *ni, struct mbuf *m) 908{ 909 const struct ether_header *eh = mtod(m, struct ether_header *); 910 int v_wme_ac, d_wme_ac, ac; 911 912 /* 913 * Always promote PAE/EAPOL frames to high priority. 914 */ 915 if (eh->ether_type == htons(ETHERTYPE_PAE)) { 916 /* NB: mark so others don't need to check header */ 917 m->m_flags |= M_EAPOL; 918 ac = WME_AC_VO; 919 goto done; 920 } 921 /* 922 * Non-qos traffic goes to BE. 923 */ 924 if ((ni->ni_flags & IEEE80211_NODE_QOS) == 0) { 925 ac = WME_AC_BE; 926 goto done; 927 } 928 929 /* 930 * If node has a vlan tag then all traffic 931 * to it must have a matching tag. 932 */ 933 v_wme_ac = 0; 934 if (ni->ni_vlan != 0) { 935 if ((m->m_flags & M_VLANTAG) == 0) { 936 IEEE80211_NODE_STAT(ni, tx_novlantag); 937 return 1; 938 } 939 if (EVL_VLANOFTAG(m->m_pkthdr.ether_vtag) != 940 EVL_VLANOFTAG(ni->ni_vlan)) { 941 IEEE80211_NODE_STAT(ni, tx_vlanmismatch); 942 return 1; 943 } 944 /* map vlan priority to AC */ 945 v_wme_ac = TID_TO_WME_AC(EVL_PRIOFTAG(ni->ni_vlan)); 946 } 947 948 /* XXX m_copydata may be too slow for fast path */ 949#ifdef INET 950 if (eh->ether_type == htons(ETHERTYPE_IP)) { 951 uint8_t tos; 952 /* 953 * IP frame, map the DSCP bits from the TOS field. 954 */ 955 /* NB: ip header may not be in first mbuf */ 956 m_copydata(m, sizeof(struct ether_header) + 957 offsetof(struct ip, ip_tos), sizeof(tos), &tos); 958 tos >>= 5; /* NB: ECN + low 3 bits of DSCP */ 959 d_wme_ac = TID_TO_WME_AC(tos); 960 } else { 961#endif /* INET */ 962#ifdef INET6 963 if (eh->ether_type == htons(ETHERTYPE_IPV6)) { 964 uint32_t flow; 965 uint8_t tos; 966 /* 967 * IPv6 frame, map the DSCP bits from the traffic class field. 968 */ 969 m_copydata(m, sizeof(struct ether_header) + 970 offsetof(struct ip6_hdr, ip6_flow), sizeof(flow), 971 (caddr_t) &flow); 972 tos = (uint8_t)(ntohl(flow) >> 20); 973 tos >>= 5; /* NB: ECN + low 3 bits of DSCP */ 974 d_wme_ac = TID_TO_WME_AC(tos); 975 } else { 976#endif /* INET6 */ 977 d_wme_ac = WME_AC_BE; 978#ifdef INET6 979 } 980#endif 981#ifdef INET 982 } 983#endif 984 /* 985 * Use highest priority AC. 986 */ 987 if (v_wme_ac > d_wme_ac) 988 ac = v_wme_ac; 989 else 990 ac = d_wme_ac; 991 992 /* 993 * Apply ACM policy. 994 */ 995 if (ni->ni_vap->iv_opmode == IEEE80211_M_STA) { 996 static const int acmap[4] = { 997 WME_AC_BK, /* WME_AC_BE */ 998 WME_AC_BK, /* WME_AC_BK */ 999 WME_AC_BE, /* WME_AC_VI */ 1000 WME_AC_VI, /* WME_AC_VO */ 1001 }; 1002 struct ieee80211com *ic = ni->ni_ic; 1003 1004 while (ac != WME_AC_BK && 1005 ic->ic_wme.wme_wmeBssChanParams.cap_wmeParams[ac].wmep_acm) 1006 ac = acmap[ac]; 1007 } 1008done: 1009 M_WME_SETAC(m, ac); 1010 return 0; 1011} 1012 1013/* 1014 * Insure there is sufficient contiguous space to encapsulate the 1015 * 802.11 data frame. If room isn't already there, arrange for it. 1016 * Drivers and cipher modules assume we have done the necessary work 1017 * and fail rudely if they don't find the space they need. 1018 */ 1019struct mbuf * 1020ieee80211_mbuf_adjust(struct ieee80211vap *vap, int hdrsize, 1021 struct ieee80211_key *key, struct mbuf *m) 1022{ 1023#define TO_BE_RECLAIMED (sizeof(struct ether_header) - sizeof(struct llc)) 1024 int needed_space = vap->iv_ic->ic_headroom + hdrsize; 1025 1026 if (key != NULL) { 1027 /* XXX belongs in crypto code? */ 1028 needed_space += key->wk_cipher->ic_header; 1029 /* XXX frags */ 1030 /* 1031 * When crypto is being done in the host we must insure 1032 * the data are writable for the cipher routines; clone 1033 * a writable mbuf chain. 1034 * XXX handle SWMIC specially 1035 */ 1036 if (key->wk_flags & (IEEE80211_KEY_SWENCRYPT|IEEE80211_KEY_SWENMIC)) { 1037 m = m_unshare(m, M_NOWAIT); 1038 if (m == NULL) { 1039 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 1040 "%s: cannot get writable mbuf\n", __func__); 1041 vap->iv_stats.is_tx_nobuf++; /* XXX new stat */ 1042 return NULL; 1043 } 1044 } 1045 } 1046 /* 1047 * We know we are called just before stripping an Ethernet 1048 * header and prepending an LLC header. This means we know 1049 * there will be 1050 * sizeof(struct ether_header) - sizeof(struct llc) 1051 * bytes recovered to which we need additional space for the 1052 * 802.11 header and any crypto header. 1053 */ 1054 /* XXX check trailing space and copy instead? */ 1055 if (M_LEADINGSPACE(m) < needed_space - TO_BE_RECLAIMED) { 1056 struct mbuf *n = m_gethdr(M_NOWAIT, m->m_type); 1057 if (n == NULL) { 1058 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 1059 "%s: cannot expand storage\n", __func__); 1060 vap->iv_stats.is_tx_nobuf++; 1061 m_freem(m); 1062 return NULL; 1063 } 1064 KASSERT(needed_space <= MHLEN, 1065 ("not enough room, need %u got %d\n", needed_space, MHLEN)); 1066 /* 1067 * Setup new mbuf to have leading space to prepend the 1068 * 802.11 header and any crypto header bits that are 1069 * required (the latter are added when the driver calls 1070 * back to ieee80211_crypto_encap to do crypto encapsulation). 1071 */ 1072 /* NB: must be first 'cuz it clobbers m_data */ 1073 m_move_pkthdr(n, m); 1074 n->m_len = 0; /* NB: m_gethdr does not set */ 1075 n->m_data += needed_space; 1076 /* 1077 * Pull up Ethernet header to create the expected layout. 1078 * We could use m_pullup but that's overkill (i.e. we don't 1079 * need the actual data) and it cannot fail so do it inline 1080 * for speed. 1081 */ 1082 /* NB: struct ether_header is known to be contiguous */ 1083 n->m_len += sizeof(struct ether_header); 1084 m->m_len -= sizeof(struct ether_header); 1085 m->m_data += sizeof(struct ether_header); 1086 /* 1087 * Replace the head of the chain. 1088 */ 1089 n->m_next = m; 1090 m = n; 1091 } 1092 return m; 1093#undef TO_BE_RECLAIMED 1094} 1095 1096/* 1097 * Return the transmit key to use in sending a unicast frame. 1098 * If a unicast key is set we use that. When no unicast key is set 1099 * we fall back to the default transmit key. 1100 */ 1101static __inline struct ieee80211_key * 1102ieee80211_crypto_getucastkey(struct ieee80211vap *vap, 1103 struct ieee80211_node *ni) 1104{ 1105 if (IEEE80211_KEY_UNDEFINED(&ni->ni_ucastkey)) { 1106 if (vap->iv_def_txkey == IEEE80211_KEYIX_NONE || 1107 IEEE80211_KEY_UNDEFINED(&vap->iv_nw_keys[vap->iv_def_txkey])) 1108 return NULL; 1109 return &vap->iv_nw_keys[vap->iv_def_txkey]; 1110 } else { 1111 return &ni->ni_ucastkey; 1112 } 1113} 1114 1115/* 1116 * Return the transmit key to use in sending a multicast frame. 1117 * Multicast traffic always uses the group key which is installed as 1118 * the default tx key. 1119 */ 1120static __inline struct ieee80211_key * 1121ieee80211_crypto_getmcastkey(struct ieee80211vap *vap, 1122 struct ieee80211_node *ni) 1123{ 1124 if (vap->iv_def_txkey == IEEE80211_KEYIX_NONE || 1125 IEEE80211_KEY_UNDEFINED(&vap->iv_nw_keys[vap->iv_def_txkey])) 1126 return NULL; 1127 return &vap->iv_nw_keys[vap->iv_def_txkey]; 1128} 1129 1130/* 1131 * Encapsulate an outbound data frame. The mbuf chain is updated. 1132 * If an error is encountered NULL is returned. The caller is required 1133 * to provide a node reference and pullup the ethernet header in the 1134 * first mbuf. 1135 * 1136 * NB: Packet is assumed to be processed by ieee80211_classify which 1137 * marked EAPOL frames w/ M_EAPOL. 1138 */ 1139struct mbuf * 1140ieee80211_encap(struct ieee80211vap *vap, struct ieee80211_node *ni, 1141 struct mbuf *m) 1142{ 1143#define WH4(wh) ((struct ieee80211_frame_addr4 *)(wh)) 1144#define MC01(mc) ((struct ieee80211_meshcntl_ae01 *)mc) 1145 struct ieee80211com *ic = ni->ni_ic; 1146#ifdef IEEE80211_SUPPORT_MESH 1147 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1148 struct ieee80211_meshcntl_ae10 *mc; 1149 struct ieee80211_mesh_route *rt = NULL; 1150 int dir = -1; 1151#endif 1152 struct ether_header eh; 1153 struct ieee80211_frame *wh; 1154 struct ieee80211_key *key; 1155 struct llc *llc; 1156 int hdrsize, hdrspace, datalen, addqos, txfrag, is4addr; 1157 ieee80211_seq seqno; 1158 int meshhdrsize, meshae; 1159 uint8_t *qos; 1160 1161 IEEE80211_TX_LOCK_ASSERT(ic); 1162 1163 /* 1164 * Copy existing Ethernet header to a safe place. The 1165 * rest of the code assumes it's ok to strip it when 1166 * reorganizing state for the final encapsulation. 1167 */ 1168 KASSERT(m->m_len >= sizeof(eh), ("no ethernet header!")); 1169 ETHER_HEADER_COPY(&eh, mtod(m, caddr_t)); 1170 1171 /* 1172 * Insure space for additional headers. First identify 1173 * transmit key to use in calculating any buffer adjustments 1174 * required. This is also used below to do privacy 1175 * encapsulation work. Then calculate the 802.11 header 1176 * size and any padding required by the driver. 1177 * 1178 * Note key may be NULL if we fall back to the default 1179 * transmit key and that is not set. In that case the 1180 * buffer may not be expanded as needed by the cipher 1181 * routines, but they will/should discard it. 1182 */ 1183 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 1184 if (vap->iv_opmode == IEEE80211_M_STA || 1185 !IEEE80211_IS_MULTICAST(eh.ether_dhost) || 1186 (vap->iv_opmode == IEEE80211_M_WDS && 1187 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY))) 1188 key = ieee80211_crypto_getucastkey(vap, ni); 1189 else 1190 key = ieee80211_crypto_getmcastkey(vap, ni); 1191 if (key == NULL && (m->m_flags & M_EAPOL) == 0) { 1192 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, 1193 eh.ether_dhost, 1194 "no default transmit key (%s) deftxkey %u", 1195 __func__, vap->iv_def_txkey); 1196 vap->iv_stats.is_tx_nodefkey++; 1197 goto bad; 1198 } 1199 } else 1200 key = NULL; 1201 /* 1202 * XXX Some ap's don't handle QoS-encapsulated EAPOL 1203 * frames so suppress use. This may be an issue if other 1204 * ap's require all data frames to be QoS-encapsulated 1205 * once negotiated in which case we'll need to make this 1206 * configurable. 1207 * NB: mesh data frames are QoS. 1208 */ 1209 addqos = ((ni->ni_flags & (IEEE80211_NODE_QOS|IEEE80211_NODE_HT)) || 1210 (vap->iv_opmode == IEEE80211_M_MBSS)) && 1211 (m->m_flags & M_EAPOL) == 0; 1212 if (addqos) 1213 hdrsize = sizeof(struct ieee80211_qosframe); 1214 else 1215 hdrsize = sizeof(struct ieee80211_frame); 1216#ifdef IEEE80211_SUPPORT_MESH 1217 if (vap->iv_opmode == IEEE80211_M_MBSS) { 1218 /* 1219 * Mesh data frames are encapsulated according to the 1220 * rules of Section 11B.8.5 (p.139 of D3.0 spec). 1221 * o Group Addressed data (aka multicast) originating 1222 * at the local sta are sent w/ 3-address format and 1223 * address extension mode 00 1224 * o Individually Addressed data (aka unicast) originating 1225 * at the local sta are sent w/ 4-address format and 1226 * address extension mode 00 1227 * o Group Addressed data forwarded from a non-mesh sta are 1228 * sent w/ 3-address format and address extension mode 01 1229 * o Individually Address data from another sta are sent 1230 * w/ 4-address format and address extension mode 10 1231 */ 1232 is4addr = 0; /* NB: don't use, disable */ 1233 if (!IEEE80211_IS_MULTICAST(eh.ether_dhost)) { 1234 rt = ieee80211_mesh_rt_find(vap, eh.ether_dhost); 1235 KASSERT(rt != NULL, ("route is NULL")); 1236 dir = IEEE80211_FC1_DIR_DSTODS; 1237 hdrsize += IEEE80211_ADDR_LEN; 1238 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { 1239 if (IEEE80211_ADDR_EQ(rt->rt_mesh_gate, 1240 vap->iv_myaddr)) { 1241 IEEE80211_NOTE_MAC(vap, 1242 IEEE80211_MSG_MESH, 1243 eh.ether_dhost, 1244 "%s", "trying to send to ourself"); 1245 goto bad; 1246 } 1247 meshae = IEEE80211_MESH_AE_10; 1248 meshhdrsize = 1249 sizeof(struct ieee80211_meshcntl_ae10); 1250 } else { 1251 meshae = IEEE80211_MESH_AE_00; 1252 meshhdrsize = 1253 sizeof(struct ieee80211_meshcntl); 1254 } 1255 } else { 1256 dir = IEEE80211_FC1_DIR_FROMDS; 1257 if (!IEEE80211_ADDR_EQ(eh.ether_shost, vap->iv_myaddr)) { 1258 /* proxy group */ 1259 meshae = IEEE80211_MESH_AE_01; 1260 meshhdrsize = 1261 sizeof(struct ieee80211_meshcntl_ae01); 1262 } else { 1263 /* group */ 1264 meshae = IEEE80211_MESH_AE_00; 1265 meshhdrsize = sizeof(struct ieee80211_meshcntl); 1266 } 1267 } 1268 } else { 1269#endif 1270 /* 1271 * 4-address frames need to be generated for: 1272 * o packets sent through a WDS vap (IEEE80211_M_WDS) 1273 * o packets sent through a vap marked for relaying 1274 * (e.g. a station operating with dynamic WDS) 1275 */ 1276 is4addr = vap->iv_opmode == IEEE80211_M_WDS || 1277 ((vap->iv_flags_ext & IEEE80211_FEXT_4ADDR) && 1278 !IEEE80211_ADDR_EQ(eh.ether_shost, vap->iv_myaddr)); 1279 if (is4addr) 1280 hdrsize += IEEE80211_ADDR_LEN; 1281 meshhdrsize = meshae = 0; 1282#ifdef IEEE80211_SUPPORT_MESH 1283 } 1284#endif 1285 /* 1286 * Honor driver DATAPAD requirement. 1287 */ 1288 if (ic->ic_flags & IEEE80211_F_DATAPAD) 1289 hdrspace = roundup(hdrsize, sizeof(uint32_t)); 1290 else 1291 hdrspace = hdrsize; 1292 1293 if (__predict_true((m->m_flags & M_FF) == 0)) { 1294 /* 1295 * Normal frame. 1296 */ 1297 m = ieee80211_mbuf_adjust(vap, hdrspace + meshhdrsize, key, m); 1298 if (m == NULL) { 1299 /* NB: ieee80211_mbuf_adjust handles msgs+statistics */ 1300 goto bad; 1301 } 1302 /* NB: this could be optimized 'cuz of ieee80211_mbuf_adjust */ 1303 m_adj(m, sizeof(struct ether_header) - sizeof(struct llc)); 1304 llc = mtod(m, struct llc *); 1305 llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP; 1306 llc->llc_control = LLC_UI; 1307 llc->llc_snap.org_code[0] = 0; 1308 llc->llc_snap.org_code[1] = 0; 1309 llc->llc_snap.org_code[2] = 0; 1310 llc->llc_snap.ether_type = eh.ether_type; 1311 } else { 1312#ifdef IEEE80211_SUPPORT_SUPERG 1313 /* 1314 * Aggregated frame. 1315 */ 1316 m = ieee80211_ff_encap(vap, m, hdrspace + meshhdrsize, key); 1317 if (m == NULL) 1318#endif 1319 goto bad; 1320 } 1321 datalen = m->m_pkthdr.len; /* NB: w/o 802.11 header */ 1322 1323 M_PREPEND(m, hdrspace + meshhdrsize, M_NOWAIT); 1324 if (m == NULL) { 1325 vap->iv_stats.is_tx_nobuf++; 1326 goto bad; 1327 } 1328 wh = mtod(m, struct ieee80211_frame *); 1329 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_DATA; 1330 *(uint16_t *)wh->i_dur = 0; 1331 qos = NULL; /* NB: quiet compiler */ 1332 if (is4addr) { 1333 wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS; 1334 IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_macaddr); 1335 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); 1336 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_dhost); 1337 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, eh.ether_shost); 1338 } else switch (vap->iv_opmode) { 1339 case IEEE80211_M_STA: 1340 wh->i_fc[1] = IEEE80211_FC1_DIR_TODS; 1341 IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_bssid); 1342 IEEE80211_ADDR_COPY(wh->i_addr2, eh.ether_shost); 1343 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_dhost); 1344 break; 1345 case IEEE80211_M_IBSS: 1346 case IEEE80211_M_AHDEMO: 1347 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 1348 IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost); 1349 IEEE80211_ADDR_COPY(wh->i_addr2, eh.ether_shost); 1350 /* 1351 * NB: always use the bssid from iv_bss as the 1352 * neighbor's may be stale after an ibss merge 1353 */ 1354 IEEE80211_ADDR_COPY(wh->i_addr3, vap->iv_bss->ni_bssid); 1355 break; 1356 case IEEE80211_M_HOSTAP: 1357 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS; 1358 IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost); 1359 IEEE80211_ADDR_COPY(wh->i_addr2, ni->ni_bssid); 1360 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_shost); 1361 break; 1362#ifdef IEEE80211_SUPPORT_MESH 1363 case IEEE80211_M_MBSS: 1364 /* NB: offset by hdrspace to deal with DATAPAD */ 1365 mc = (struct ieee80211_meshcntl_ae10 *) 1366 (mtod(m, uint8_t *) + hdrspace); 1367 wh->i_fc[1] = dir; 1368 switch (meshae) { 1369 case IEEE80211_MESH_AE_00: /* no proxy */ 1370 mc->mc_flags = 0; 1371 if (dir == IEEE80211_FC1_DIR_DSTODS) { /* ucast */ 1372 IEEE80211_ADDR_COPY(wh->i_addr1, 1373 ni->ni_macaddr); 1374 IEEE80211_ADDR_COPY(wh->i_addr2, 1375 vap->iv_myaddr); 1376 IEEE80211_ADDR_COPY(wh->i_addr3, 1377 eh.ether_dhost); 1378 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, 1379 eh.ether_shost); 1380 qos =((struct ieee80211_qosframe_addr4 *) 1381 wh)->i_qos; 1382 } else if (dir == IEEE80211_FC1_DIR_FROMDS) { 1383 /* mcast */ 1384 IEEE80211_ADDR_COPY(wh->i_addr1, 1385 eh.ether_dhost); 1386 IEEE80211_ADDR_COPY(wh->i_addr2, 1387 vap->iv_myaddr); 1388 IEEE80211_ADDR_COPY(wh->i_addr3, 1389 eh.ether_shost); 1390 qos = ((struct ieee80211_qosframe *) 1391 wh)->i_qos; 1392 } 1393 break; 1394 case IEEE80211_MESH_AE_01: /* mcast, proxy */ 1395 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS; 1396 IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost); 1397 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); 1398 IEEE80211_ADDR_COPY(wh->i_addr3, vap->iv_myaddr); 1399 mc->mc_flags = 1; 1400 IEEE80211_ADDR_COPY(MC01(mc)->mc_addr4, 1401 eh.ether_shost); 1402 qos = ((struct ieee80211_qosframe *) wh)->i_qos; 1403 break; 1404 case IEEE80211_MESH_AE_10: /* ucast, proxy */ 1405 KASSERT(rt != NULL, ("route is NULL")); 1406 IEEE80211_ADDR_COPY(wh->i_addr1, rt->rt_nexthop); 1407 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); 1408 IEEE80211_ADDR_COPY(wh->i_addr3, rt->rt_mesh_gate); 1409 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, vap->iv_myaddr); 1410 mc->mc_flags = IEEE80211_MESH_AE_10; 1411 IEEE80211_ADDR_COPY(mc->mc_addr5, eh.ether_dhost); 1412 IEEE80211_ADDR_COPY(mc->mc_addr6, eh.ether_shost); 1413 qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos; 1414 break; 1415 default: 1416 KASSERT(0, ("meshae %d", meshae)); 1417 break; 1418 } 1419 mc->mc_ttl = ms->ms_ttl; 1420 ms->ms_seq++; 1421 LE_WRITE_4(mc->mc_seq, ms->ms_seq); 1422 break; 1423#endif 1424 case IEEE80211_M_WDS: /* NB: is4addr should always be true */ 1425 default: 1426 goto bad; 1427 } 1428 if (m->m_flags & M_MORE_DATA) 1429 wh->i_fc[1] |= IEEE80211_FC1_MORE_DATA; 1430 if (addqos) { 1431 int ac, tid; 1432 1433 if (is4addr) { 1434 qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos; 1435 /* NB: mesh case handled earlier */ 1436 } else if (vap->iv_opmode != IEEE80211_M_MBSS) 1437 qos = ((struct ieee80211_qosframe *) wh)->i_qos; 1438 ac = M_WME_GETAC(m); 1439 /* map from access class/queue to 11e header priorty value */ 1440 tid = WME_AC_TO_TID(ac); 1441 qos[0] = tid & IEEE80211_QOS_TID; 1442 if (ic->ic_wme.wme_wmeChanParams.cap_wmeParams[ac].wmep_noackPolicy) 1443 qos[0] |= IEEE80211_QOS_ACKPOLICY_NOACK; 1444#ifdef IEEE80211_SUPPORT_MESH 1445 if (vap->iv_opmode == IEEE80211_M_MBSS) 1446 qos[1] = IEEE80211_QOS_MC; 1447 else 1448#endif 1449 qos[1] = 0; 1450 wh->i_fc[0] |= IEEE80211_FC0_SUBTYPE_QOS; 1451 1452 if ((m->m_flags & M_AMPDU_MPDU) == 0) { 1453 /* 1454 * NB: don't assign a sequence # to potential 1455 * aggregates; we expect this happens at the 1456 * point the frame comes off any aggregation q 1457 * as otherwise we may introduce holes in the 1458 * BA sequence space and/or make window accouting 1459 * more difficult. 1460 * 1461 * XXX may want to control this with a driver 1462 * capability; this may also change when we pull 1463 * aggregation up into net80211 1464 */ 1465 seqno = ni->ni_txseqs[tid]++; 1466 *(uint16_t *)wh->i_seq = 1467 htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); 1468 M_SEQNO_SET(m, seqno); 1469 } 1470 } else { 1471 seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]++; 1472 *(uint16_t *)wh->i_seq = 1473 htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); 1474 M_SEQNO_SET(m, seqno); 1475 } 1476 1477 1478 /* check if xmit fragmentation is required */ 1479 txfrag = (m->m_pkthdr.len > vap->iv_fragthreshold && 1480 !IEEE80211_IS_MULTICAST(wh->i_addr1) && 1481 (vap->iv_caps & IEEE80211_C_TXFRAG) && 1482 (m->m_flags & (M_FF | M_AMPDU_MPDU)) == 0); 1483 if (key != NULL) { 1484 /* 1485 * IEEE 802.1X: send EAPOL frames always in the clear. 1486 * WPA/WPA2: encrypt EAPOL keys when pairwise keys are set. 1487 */ 1488 if ((m->m_flags & M_EAPOL) == 0 || 1489 ((vap->iv_flags & IEEE80211_F_WPA) && 1490 (vap->iv_opmode == IEEE80211_M_STA ? 1491 !IEEE80211_KEY_UNDEFINED(key) : 1492 !IEEE80211_KEY_UNDEFINED(&ni->ni_ucastkey)))) { 1493 wh->i_fc[1] |= IEEE80211_FC1_WEP; 1494 if (!ieee80211_crypto_enmic(vap, key, m, txfrag)) { 1495 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, 1496 eh.ether_dhost, 1497 "%s", "enmic failed, discard frame"); 1498 vap->iv_stats.is_crypto_enmicfail++; 1499 goto bad; 1500 } 1501 } 1502 } 1503 if (txfrag && !ieee80211_fragment(vap, m, hdrsize, 1504 key != NULL ? key->wk_cipher->ic_header : 0, vap->iv_fragthreshold)) 1505 goto bad; 1506 1507 m->m_flags |= M_ENCAP; /* mark encapsulated */ 1508 1509 IEEE80211_NODE_STAT(ni, tx_data); 1510 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1511 IEEE80211_NODE_STAT(ni, tx_mcast); 1512 m->m_flags |= M_MCAST; 1513 } else 1514 IEEE80211_NODE_STAT(ni, tx_ucast); 1515 IEEE80211_NODE_STAT_ADD(ni, tx_bytes, datalen); 1516 1517 return m; 1518bad: 1519 if (m != NULL) 1520 m_freem(m); 1521 return NULL; 1522#undef WH4 1523#undef MC01 1524} 1525 1526/* 1527 * Fragment the frame according to the specified mtu. 1528 * The size of the 802.11 header (w/o padding) is provided 1529 * so we don't need to recalculate it. We create a new 1530 * mbuf for each fragment and chain it through m_nextpkt; 1531 * we might be able to optimize this by reusing the original 1532 * packet's mbufs but that is significantly more complicated. 1533 */ 1534static int 1535ieee80211_fragment(struct ieee80211vap *vap, struct mbuf *m0, 1536 u_int hdrsize, u_int ciphdrsize, u_int mtu) 1537{ 1538 struct ieee80211com *ic = vap->iv_ic; 1539 struct ieee80211_frame *wh, *whf; 1540 struct mbuf *m, *prev, *next; 1541 u_int totalhdrsize, fragno, fragsize, off, remainder, payload; 1542 u_int hdrspace; 1543 1544 KASSERT(m0->m_nextpkt == NULL, ("mbuf already chained?")); 1545 KASSERT(m0->m_pkthdr.len > mtu, 1546 ("pktlen %u mtu %u", m0->m_pkthdr.len, mtu)); 1547 1548 /* 1549 * Honor driver DATAPAD requirement. 1550 */ 1551 if (ic->ic_flags & IEEE80211_F_DATAPAD) 1552 hdrspace = roundup(hdrsize, sizeof(uint32_t)); 1553 else 1554 hdrspace = hdrsize; 1555 1556 wh = mtod(m0, struct ieee80211_frame *); 1557 /* NB: mark the first frag; it will be propagated below */ 1558 wh->i_fc[1] |= IEEE80211_FC1_MORE_FRAG; 1559 totalhdrsize = hdrspace + ciphdrsize; 1560 fragno = 1; 1561 off = mtu - ciphdrsize; 1562 remainder = m0->m_pkthdr.len - off; 1563 prev = m0; 1564 do { 1565 fragsize = totalhdrsize + remainder; 1566 if (fragsize > mtu) 1567 fragsize = mtu; 1568 /* XXX fragsize can be >2048! */ 1569 KASSERT(fragsize < MCLBYTES, 1570 ("fragment size %u too big!", fragsize)); 1571 if (fragsize > MHLEN) 1572 m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR); 1573 else 1574 m = m_gethdr(M_NOWAIT, MT_DATA); 1575 if (m == NULL) 1576 goto bad; 1577 /* leave room to prepend any cipher header */ 1578 m_align(m, fragsize - ciphdrsize); 1579 1580 /* 1581 * Form the header in the fragment. Note that since 1582 * we mark the first fragment with the MORE_FRAG bit 1583 * it automatically is propagated to each fragment; we 1584 * need only clear it on the last fragment (done below). 1585 * NB: frag 1+ dont have Mesh Control field present. 1586 */ 1587 whf = mtod(m, struct ieee80211_frame *); 1588 memcpy(whf, wh, hdrsize); 1589#ifdef IEEE80211_SUPPORT_MESH 1590 if (vap->iv_opmode == IEEE80211_M_MBSS) { 1591 if (IEEE80211_IS_DSTODS(wh)) 1592 ((struct ieee80211_qosframe_addr4 *) 1593 whf)->i_qos[1] &= ~IEEE80211_QOS_MC; 1594 else 1595 ((struct ieee80211_qosframe *) 1596 whf)->i_qos[1] &= ~IEEE80211_QOS_MC; 1597 } 1598#endif 1599 *(uint16_t *)&whf->i_seq[0] |= htole16( 1600 (fragno & IEEE80211_SEQ_FRAG_MASK) << 1601 IEEE80211_SEQ_FRAG_SHIFT); 1602 fragno++; 1603 1604 payload = fragsize - totalhdrsize; 1605 /* NB: destination is known to be contiguous */ 1606 1607 m_copydata(m0, off, payload, mtod(m, uint8_t *) + hdrspace); 1608 m->m_len = hdrspace + payload; 1609 m->m_pkthdr.len = hdrspace + payload; 1610 m->m_flags |= M_FRAG; 1611 1612 /* chain up the fragment */ 1613 prev->m_nextpkt = m; 1614 prev = m; 1615 1616 /* deduct fragment just formed */ 1617 remainder -= payload; 1618 off += payload; 1619 } while (remainder != 0); 1620 1621 /* set the last fragment */ 1622 m->m_flags |= M_LASTFRAG; 1623 whf->i_fc[1] &= ~IEEE80211_FC1_MORE_FRAG; 1624 1625 /* strip first mbuf now that everything has been copied */ 1626 m_adj(m0, -(m0->m_pkthdr.len - (mtu - ciphdrsize))); 1627 m0->m_flags |= M_FIRSTFRAG | M_FRAG; 1628 1629 vap->iv_stats.is_tx_fragframes++; 1630 vap->iv_stats.is_tx_frags += fragno-1; 1631 1632 return 1; 1633bad: 1634 /* reclaim fragments but leave original frame for caller to free */ 1635 for (m = m0->m_nextpkt; m != NULL; m = next) { 1636 next = m->m_nextpkt; 1637 m->m_nextpkt = NULL; /* XXX paranoid */ 1638 m_freem(m); 1639 } 1640 m0->m_nextpkt = NULL; 1641 return 0; 1642} 1643 1644/* 1645 * Add a supported rates element id to a frame. 1646 */ 1647uint8_t * 1648ieee80211_add_rates(uint8_t *frm, const struct ieee80211_rateset *rs) 1649{ 1650 int nrates; 1651 1652 *frm++ = IEEE80211_ELEMID_RATES; 1653 nrates = rs->rs_nrates; 1654 if (nrates > IEEE80211_RATE_SIZE) 1655 nrates = IEEE80211_RATE_SIZE; 1656 *frm++ = nrates; 1657 memcpy(frm, rs->rs_rates, nrates); 1658 return frm + nrates; 1659} 1660 1661/* 1662 * Add an extended supported rates element id to a frame. 1663 */ 1664uint8_t * 1665ieee80211_add_xrates(uint8_t *frm, const struct ieee80211_rateset *rs) 1666{ 1667 /* 1668 * Add an extended supported rates element if operating in 11g mode. 1669 */ 1670 if (rs->rs_nrates > IEEE80211_RATE_SIZE) { 1671 int nrates = rs->rs_nrates - IEEE80211_RATE_SIZE; 1672 *frm++ = IEEE80211_ELEMID_XRATES; 1673 *frm++ = nrates; 1674 memcpy(frm, rs->rs_rates + IEEE80211_RATE_SIZE, nrates); 1675 frm += nrates; 1676 } 1677 return frm; 1678} 1679 1680/* 1681 * Add an ssid element to a frame. 1682 */ 1683static uint8_t * 1684ieee80211_add_ssid(uint8_t *frm, const uint8_t *ssid, u_int len) 1685{ 1686 *frm++ = IEEE80211_ELEMID_SSID; 1687 *frm++ = len; 1688 memcpy(frm, ssid, len); 1689 return frm + len; 1690} 1691 1692/* 1693 * Add an erp element to a frame. 1694 */ 1695static uint8_t * 1696ieee80211_add_erp(uint8_t *frm, struct ieee80211com *ic) 1697{ 1698 uint8_t erp; 1699 1700 *frm++ = IEEE80211_ELEMID_ERP; 1701 *frm++ = 1; 1702 erp = 0; 1703 if (ic->ic_nonerpsta != 0) 1704 erp |= IEEE80211_ERP_NON_ERP_PRESENT; 1705 if (ic->ic_flags & IEEE80211_F_USEPROT) 1706 erp |= IEEE80211_ERP_USE_PROTECTION; 1707 if (ic->ic_flags & IEEE80211_F_USEBARKER) 1708 erp |= IEEE80211_ERP_LONG_PREAMBLE; 1709 *frm++ = erp; 1710 return frm; 1711} 1712 1713/* 1714 * Add a CFParams element to a frame. 1715 */ 1716static uint8_t * 1717ieee80211_add_cfparms(uint8_t *frm, struct ieee80211com *ic) 1718{ 1719#define ADDSHORT(frm, v) do { \ 1720 LE_WRITE_2(frm, v); \ 1721 frm += 2; \ 1722} while (0) 1723 *frm++ = IEEE80211_ELEMID_CFPARMS; 1724 *frm++ = 6; 1725 *frm++ = 0; /* CFP count */ 1726 *frm++ = 2; /* CFP period */ 1727 ADDSHORT(frm, 0); /* CFP MaxDuration (TU) */ 1728 ADDSHORT(frm, 0); /* CFP CurRemaining (TU) */ 1729 return frm; 1730#undef ADDSHORT 1731} 1732 1733static __inline uint8_t * 1734add_appie(uint8_t *frm, const struct ieee80211_appie *ie) 1735{ 1736 memcpy(frm, ie->ie_data, ie->ie_len); 1737 return frm + ie->ie_len; 1738} 1739 1740static __inline uint8_t * 1741add_ie(uint8_t *frm, const uint8_t *ie) 1742{ 1743 memcpy(frm, ie, 2 + ie[1]); 1744 return frm + 2 + ie[1]; 1745} 1746 1747#define WME_OUI_BYTES 0x00, 0x50, 0xf2 1748/* 1749 * Add a WME information element to a frame. 1750 */ 1751static uint8_t * 1752ieee80211_add_wme_info(uint8_t *frm, struct ieee80211_wme_state *wme) 1753{ 1754 static const struct ieee80211_wme_info info = { 1755 .wme_id = IEEE80211_ELEMID_VENDOR, 1756 .wme_len = sizeof(struct ieee80211_wme_info) - 2, 1757 .wme_oui = { WME_OUI_BYTES }, 1758 .wme_type = WME_OUI_TYPE, 1759 .wme_subtype = WME_INFO_OUI_SUBTYPE, 1760 .wme_version = WME_VERSION, 1761 .wme_info = 0, 1762 }; 1763 memcpy(frm, &info, sizeof(info)); 1764 return frm + sizeof(info); 1765} 1766 1767/* 1768 * Add a WME parameters element to a frame. 1769 */ 1770static uint8_t * 1771ieee80211_add_wme_param(uint8_t *frm, struct ieee80211_wme_state *wme) 1772{ 1773#define SM(_v, _f) (((_v) << _f##_S) & _f) 1774#define ADDSHORT(frm, v) do { \ 1775 LE_WRITE_2(frm, v); \ 1776 frm += 2; \ 1777} while (0) 1778 /* NB: this works 'cuz a param has an info at the front */ 1779 static const struct ieee80211_wme_info param = { 1780 .wme_id = IEEE80211_ELEMID_VENDOR, 1781 .wme_len = sizeof(struct ieee80211_wme_param) - 2, 1782 .wme_oui = { WME_OUI_BYTES }, 1783 .wme_type = WME_OUI_TYPE, 1784 .wme_subtype = WME_PARAM_OUI_SUBTYPE, 1785 .wme_version = WME_VERSION, 1786 }; 1787 int i; 1788 1789 memcpy(frm, ¶m, sizeof(param)); 1790 frm += __offsetof(struct ieee80211_wme_info, wme_info); 1791 *frm++ = wme->wme_bssChanParams.cap_info; /* AC info */ 1792 *frm++ = 0; /* reserved field */ 1793 for (i = 0; i < WME_NUM_AC; i++) { 1794 const struct wmeParams *ac = 1795 &wme->wme_bssChanParams.cap_wmeParams[i]; 1796 *frm++ = SM(i, WME_PARAM_ACI) 1797 | SM(ac->wmep_acm, WME_PARAM_ACM) 1798 | SM(ac->wmep_aifsn, WME_PARAM_AIFSN) 1799 ; 1800 *frm++ = SM(ac->wmep_logcwmax, WME_PARAM_LOGCWMAX) 1801 | SM(ac->wmep_logcwmin, WME_PARAM_LOGCWMIN) 1802 ; 1803 ADDSHORT(frm, ac->wmep_txopLimit); 1804 } 1805 return frm; 1806#undef SM 1807#undef ADDSHORT 1808} 1809#undef WME_OUI_BYTES 1810 1811/* 1812 * Add an 11h Power Constraint element to a frame. 1813 */ 1814static uint8_t * 1815ieee80211_add_powerconstraint(uint8_t *frm, struct ieee80211vap *vap) 1816{ 1817 const struct ieee80211_channel *c = vap->iv_bss->ni_chan; 1818 /* XXX per-vap tx power limit? */ 1819 int8_t limit = vap->iv_ic->ic_txpowlimit / 2; 1820 1821 frm[0] = IEEE80211_ELEMID_PWRCNSTR; 1822 frm[1] = 1; 1823 frm[2] = c->ic_maxregpower > limit ? c->ic_maxregpower - limit : 0; 1824 return frm + 3; 1825} 1826 1827/* 1828 * Add an 11h Power Capability element to a frame. 1829 */ 1830static uint8_t * 1831ieee80211_add_powercapability(uint8_t *frm, const struct ieee80211_channel *c) 1832{ 1833 frm[0] = IEEE80211_ELEMID_PWRCAP; 1834 frm[1] = 2; 1835 frm[2] = c->ic_minpower; 1836 frm[3] = c->ic_maxpower; 1837 return frm + 4; 1838} 1839 1840/* 1841 * Add an 11h Supported Channels element to a frame. 1842 */ 1843static uint8_t * 1844ieee80211_add_supportedchannels(uint8_t *frm, struct ieee80211com *ic) 1845{ 1846 static const int ielen = 26; 1847 1848 frm[0] = IEEE80211_ELEMID_SUPPCHAN; 1849 frm[1] = ielen; 1850 /* XXX not correct */ 1851 memcpy(frm+2, ic->ic_chan_avail, ielen); 1852 return frm + 2 + ielen; 1853} 1854 1855/* 1856 * Add an 11h Quiet time element to a frame. 1857 */ 1858static uint8_t * 1859ieee80211_add_quiet(uint8_t *frm, struct ieee80211vap *vap) 1860{ 1861 struct ieee80211_quiet_ie *quiet = (struct ieee80211_quiet_ie *) frm; 1862 1863 quiet->quiet_ie = IEEE80211_ELEMID_QUIET; 1864 quiet->len = 6; 1865 if (vap->iv_quiet_count_value == 1) 1866 vap->iv_quiet_count_value = vap->iv_quiet_count; 1867 else if (vap->iv_quiet_count_value > 1) 1868 vap->iv_quiet_count_value--; 1869 1870 if (vap->iv_quiet_count_value == 0) { 1871 /* value 0 is reserved as per 802.11h standerd */ 1872 vap->iv_quiet_count_value = 1; 1873 } 1874 1875 quiet->tbttcount = vap->iv_quiet_count_value; 1876 quiet->period = vap->iv_quiet_period; 1877 quiet->duration = htole16(vap->iv_quiet_duration); 1878 quiet->offset = htole16(vap->iv_quiet_offset); 1879 return frm + sizeof(*quiet); 1880} 1881 1882/* 1883 * Add an 11h Channel Switch Announcement element to a frame. 1884 * Note that we use the per-vap CSA count to adjust the global 1885 * counter so we can use this routine to form probe response 1886 * frames and get the current count. 1887 */ 1888static uint8_t * 1889ieee80211_add_csa(uint8_t *frm, struct ieee80211vap *vap) 1890{ 1891 struct ieee80211com *ic = vap->iv_ic; 1892 struct ieee80211_csa_ie *csa = (struct ieee80211_csa_ie *) frm; 1893 1894 csa->csa_ie = IEEE80211_ELEMID_CSA; 1895 csa->csa_len = 3; 1896 csa->csa_mode = 1; /* XXX force quiet on channel */ 1897 csa->csa_newchan = ieee80211_chan2ieee(ic, ic->ic_csa_newchan); 1898 csa->csa_count = ic->ic_csa_count - vap->iv_csa_count; 1899 return frm + sizeof(*csa); 1900} 1901 1902/* 1903 * Add an 11h country information element to a frame. 1904 */ 1905static uint8_t * 1906ieee80211_add_countryie(uint8_t *frm, struct ieee80211com *ic) 1907{ 1908 1909 if (ic->ic_countryie == NULL || 1910 ic->ic_countryie_chan != ic->ic_bsschan) { 1911 /* 1912 * Handle lazy construction of ie. This is done on 1913 * first use and after a channel change that requires 1914 * re-calculation. 1915 */ 1916 if (ic->ic_countryie != NULL) 1917 free(ic->ic_countryie, M_80211_NODE_IE); 1918 ic->ic_countryie = ieee80211_alloc_countryie(ic); 1919 if (ic->ic_countryie == NULL) 1920 return frm; 1921 ic->ic_countryie_chan = ic->ic_bsschan; 1922 } 1923 return add_appie(frm, ic->ic_countryie); 1924} 1925 1926uint8_t * 1927ieee80211_add_wpa(uint8_t *frm, const struct ieee80211vap *vap) 1928{ 1929 if (vap->iv_flags & IEEE80211_F_WPA1 && vap->iv_wpa_ie != NULL) 1930 return (add_ie(frm, vap->iv_wpa_ie)); 1931 else { 1932 /* XXX else complain? */ 1933 return (frm); 1934 } 1935} 1936 1937uint8_t * 1938ieee80211_add_rsn(uint8_t *frm, const struct ieee80211vap *vap) 1939{ 1940 if (vap->iv_flags & IEEE80211_F_WPA2 && vap->iv_rsn_ie != NULL) 1941 return (add_ie(frm, vap->iv_rsn_ie)); 1942 else { 1943 /* XXX else complain? */ 1944 return (frm); 1945 } 1946} 1947 1948uint8_t * 1949ieee80211_add_qos(uint8_t *frm, const struct ieee80211_node *ni) 1950{ 1951 if (ni->ni_flags & IEEE80211_NODE_QOS) { 1952 *frm++ = IEEE80211_ELEMID_QOS; 1953 *frm++ = 1; 1954 *frm++ = 0; 1955 } 1956 1957 return (frm); 1958} 1959 1960/* 1961 * Send a probe request frame with the specified ssid 1962 * and any optional information element data. 1963 */ 1964int 1965ieee80211_send_probereq(struct ieee80211_node *ni, 1966 const uint8_t sa[IEEE80211_ADDR_LEN], 1967 const uint8_t da[IEEE80211_ADDR_LEN], 1968 const uint8_t bssid[IEEE80211_ADDR_LEN], 1969 const uint8_t *ssid, size_t ssidlen) 1970{ 1971 struct ieee80211vap *vap = ni->ni_vap; 1972 struct ieee80211com *ic = ni->ni_ic; 1973 const struct ieee80211_txparam *tp; 1974 struct ieee80211_bpf_params params; 1975 struct ieee80211_frame *wh; 1976 const struct ieee80211_rateset *rs; 1977 struct mbuf *m; 1978 uint8_t *frm; 1979 int ret; 1980 1981 if (vap->iv_state == IEEE80211_S_CAC) { 1982 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni, 1983 "block %s frame in CAC state", "probe request"); 1984 vap->iv_stats.is_tx_badstate++; 1985 return EIO; /* XXX */ 1986 } 1987 1988 /* 1989 * Hold a reference on the node so it doesn't go away until after 1990 * the xmit is complete all the way in the driver. On error we 1991 * will remove our reference. 1992 */ 1993 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1994 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", 1995 __func__, __LINE__, 1996 ni, ether_sprintf(ni->ni_macaddr), 1997 ieee80211_node_refcnt(ni)+1); 1998 ieee80211_ref_node(ni); 1999 2000 /* 2001 * prreq frame format 2002 * [tlv] ssid 2003 * [tlv] supported rates 2004 * [tlv] RSN (optional) 2005 * [tlv] extended supported rates 2006 * [tlv] WPA (optional) 2007 * [tlv] user-specified ie's 2008 */ 2009 m = ieee80211_getmgtframe(&frm, 2010 ic->ic_headroom + sizeof(struct ieee80211_frame), 2011 2 + IEEE80211_NWID_LEN 2012 + 2 + IEEE80211_RATE_SIZE 2013 + sizeof(struct ieee80211_ie_wpa) 2014 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2015 + sizeof(struct ieee80211_ie_wpa) 2016 + (vap->iv_appie_probereq != NULL ? 2017 vap->iv_appie_probereq->ie_len : 0) 2018 ); 2019 if (m == NULL) { 2020 vap->iv_stats.is_tx_nobuf++; 2021 ieee80211_free_node(ni); 2022 return ENOMEM; 2023 } 2024 2025 frm = ieee80211_add_ssid(frm, ssid, ssidlen); 2026 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2027 frm = ieee80211_add_rates(frm, rs); 2028 frm = ieee80211_add_rsn(frm, vap); 2029 frm = ieee80211_add_xrates(frm, rs); 2030 frm = ieee80211_add_wpa(frm, vap); 2031 if (vap->iv_appie_probereq != NULL) 2032 frm = add_appie(frm, vap->iv_appie_probereq); 2033 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2034 2035 KASSERT(M_LEADINGSPACE(m) >= sizeof(struct ieee80211_frame), 2036 ("leading space %zd", M_LEADINGSPACE(m))); 2037 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); 2038 if (m == NULL) { 2039 /* NB: cannot happen */ 2040 ieee80211_free_node(ni); 2041 return ENOMEM; 2042 } 2043 2044 IEEE80211_TX_LOCK(ic); 2045 wh = mtod(m, struct ieee80211_frame *); 2046 ieee80211_send_setup(ni, m, 2047 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ, 2048 IEEE80211_NONQOS_TID, sa, da, bssid); 2049 /* XXX power management? */ 2050 m->m_flags |= M_ENCAP; /* mark encapsulated */ 2051 2052 M_WME_SETAC(m, WME_AC_BE); 2053 2054 IEEE80211_NODE_STAT(ni, tx_probereq); 2055 IEEE80211_NODE_STAT(ni, tx_mgmt); 2056 2057 IEEE80211_DPRINTF(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS, 2058 "send probe req on channel %u bssid %s ssid \"%.*s\"\n", 2059 ieee80211_chan2ieee(ic, ic->ic_curchan), ether_sprintf(bssid), 2060 ssidlen, ssid); 2061 2062 memset(¶ms, 0, sizeof(params)); 2063 params.ibp_pri = M_WME_GETAC(m); 2064 tp = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)]; 2065 params.ibp_rate0 = tp->mgmtrate; 2066 if (IEEE80211_IS_MULTICAST(da)) { 2067 params.ibp_flags |= IEEE80211_BPF_NOACK; 2068 params.ibp_try0 = 1; 2069 } else 2070 params.ibp_try0 = tp->maxretry; 2071 params.ibp_power = ni->ni_txpower; 2072 ret = ieee80211_raw_output(vap, ni, m, ¶ms); 2073 IEEE80211_TX_UNLOCK(ic); 2074 return (ret); 2075} 2076 2077/* 2078 * Calculate capability information for mgt frames. 2079 */ 2080uint16_t 2081ieee80211_getcapinfo(struct ieee80211vap *vap, struct ieee80211_channel *chan) 2082{ 2083 struct ieee80211com *ic = vap->iv_ic; 2084 uint16_t capinfo; 2085 2086 KASSERT(vap->iv_opmode != IEEE80211_M_STA, ("station mode")); 2087 2088 if (vap->iv_opmode == IEEE80211_M_HOSTAP) 2089 capinfo = IEEE80211_CAPINFO_ESS; 2090 else if (vap->iv_opmode == IEEE80211_M_IBSS) 2091 capinfo = IEEE80211_CAPINFO_IBSS; 2092 else 2093 capinfo = 0; 2094 if (vap->iv_flags & IEEE80211_F_PRIVACY) 2095 capinfo |= IEEE80211_CAPINFO_PRIVACY; 2096 if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && 2097 IEEE80211_IS_CHAN_2GHZ(chan)) 2098 capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE; 2099 if (ic->ic_flags & IEEE80211_F_SHSLOT) 2100 capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME; 2101 if (IEEE80211_IS_CHAN_5GHZ(chan) && (vap->iv_flags & IEEE80211_F_DOTH)) 2102 capinfo |= IEEE80211_CAPINFO_SPECTRUM_MGMT; 2103 return capinfo; 2104} 2105 2106/* 2107 * Send a management frame. The node is for the destination (or ic_bss 2108 * when in station mode). Nodes other than ic_bss have their reference 2109 * count bumped to reflect our use for an indeterminant time. 2110 */ 2111int 2112ieee80211_send_mgmt(struct ieee80211_node *ni, int type, int arg) 2113{ 2114#define HTFLAGS (IEEE80211_NODE_HT | IEEE80211_NODE_HTCOMPAT) 2115#define senderr(_x, _v) do { vap->iv_stats._v++; ret = _x; goto bad; } while (0) 2116 struct ieee80211vap *vap = ni->ni_vap; 2117 struct ieee80211com *ic = ni->ni_ic; 2118 struct ieee80211_node *bss = vap->iv_bss; 2119 struct ieee80211_bpf_params params; 2120 struct mbuf *m; 2121 uint8_t *frm; 2122 uint16_t capinfo; 2123 int has_challenge, is_shared_key, ret, status; 2124 2125 KASSERT(ni != NULL, ("null node")); 2126 2127 /* 2128 * Hold a reference on the node so it doesn't go away until after 2129 * the xmit is complete all the way in the driver. On error we 2130 * will remove our reference. 2131 */ 2132 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2133 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", 2134 __func__, __LINE__, 2135 ni, ether_sprintf(ni->ni_macaddr), 2136 ieee80211_node_refcnt(ni)+1); 2137 ieee80211_ref_node(ni); 2138 2139 memset(¶ms, 0, sizeof(params)); 2140 switch (type) { 2141 2142 case IEEE80211_FC0_SUBTYPE_AUTH: 2143 status = arg >> 16; 2144 arg &= 0xffff; 2145 has_challenge = ((arg == IEEE80211_AUTH_SHARED_CHALLENGE || 2146 arg == IEEE80211_AUTH_SHARED_RESPONSE) && 2147 ni->ni_challenge != NULL); 2148 2149 /* 2150 * Deduce whether we're doing open authentication or 2151 * shared key authentication. We do the latter if 2152 * we're in the middle of a shared key authentication 2153 * handshake or if we're initiating an authentication 2154 * request and configured to use shared key. 2155 */ 2156 is_shared_key = has_challenge || 2157 arg >= IEEE80211_AUTH_SHARED_RESPONSE || 2158 (arg == IEEE80211_AUTH_SHARED_REQUEST && 2159 bss->ni_authmode == IEEE80211_AUTH_SHARED); 2160 2161 m = ieee80211_getmgtframe(&frm, 2162 ic->ic_headroom + sizeof(struct ieee80211_frame), 2163 3 * sizeof(uint16_t) 2164 + (has_challenge && status == IEEE80211_STATUS_SUCCESS ? 2165 sizeof(uint16_t)+IEEE80211_CHALLENGE_LEN : 0) 2166 ); 2167 if (m == NULL) 2168 senderr(ENOMEM, is_tx_nobuf); 2169 2170 ((uint16_t *)frm)[0] = 2171 (is_shared_key) ? htole16(IEEE80211_AUTH_ALG_SHARED) 2172 : htole16(IEEE80211_AUTH_ALG_OPEN); 2173 ((uint16_t *)frm)[1] = htole16(arg); /* sequence number */ 2174 ((uint16_t *)frm)[2] = htole16(status);/* status */ 2175 2176 if (has_challenge && status == IEEE80211_STATUS_SUCCESS) { 2177 ((uint16_t *)frm)[3] = 2178 htole16((IEEE80211_CHALLENGE_LEN << 8) | 2179 IEEE80211_ELEMID_CHALLENGE); 2180 memcpy(&((uint16_t *)frm)[4], ni->ni_challenge, 2181 IEEE80211_CHALLENGE_LEN); 2182 m->m_pkthdr.len = m->m_len = 2183 4 * sizeof(uint16_t) + IEEE80211_CHALLENGE_LEN; 2184 if (arg == IEEE80211_AUTH_SHARED_RESPONSE) { 2185 IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni, 2186 "request encrypt frame (%s)", __func__); 2187 /* mark frame for encryption */ 2188 params.ibp_flags |= IEEE80211_BPF_CRYPTO; 2189 } 2190 } else 2191 m->m_pkthdr.len = m->m_len = 3 * sizeof(uint16_t); 2192 2193 /* XXX not right for shared key */ 2194 if (status == IEEE80211_STATUS_SUCCESS) 2195 IEEE80211_NODE_STAT(ni, tx_auth); 2196 else 2197 IEEE80211_NODE_STAT(ni, tx_auth_fail); 2198 2199 if (vap->iv_opmode == IEEE80211_M_STA) 2200 ieee80211_add_callback(m, ieee80211_tx_mgt_cb, 2201 (void *) vap->iv_state); 2202 break; 2203 2204 case IEEE80211_FC0_SUBTYPE_DEAUTH: 2205 IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni, 2206 "send station deauthenticate (reason %d)", arg); 2207 m = ieee80211_getmgtframe(&frm, 2208 ic->ic_headroom + sizeof(struct ieee80211_frame), 2209 sizeof(uint16_t)); 2210 if (m == NULL) 2211 senderr(ENOMEM, is_tx_nobuf); 2212 *(uint16_t *)frm = htole16(arg); /* reason */ 2213 m->m_pkthdr.len = m->m_len = sizeof(uint16_t); 2214 2215 IEEE80211_NODE_STAT(ni, tx_deauth); 2216 IEEE80211_NODE_STAT_SET(ni, tx_deauth_code, arg); 2217 2218 ieee80211_node_unauthorize(ni); /* port closed */ 2219 break; 2220 2221 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 2222 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 2223 /* 2224 * asreq frame format 2225 * [2] capability information 2226 * [2] listen interval 2227 * [6*] current AP address (reassoc only) 2228 * [tlv] ssid 2229 * [tlv] supported rates 2230 * [tlv] extended supported rates 2231 * [4] power capability (optional) 2232 * [28] supported channels (optional) 2233 * [tlv] HT capabilities 2234 * [tlv] WME (optional) 2235 * [tlv] Vendor OUI HT capabilities (optional) 2236 * [tlv] Atheros capabilities (if negotiated) 2237 * [tlv] AppIE's (optional) 2238 */ 2239 m = ieee80211_getmgtframe(&frm, 2240 ic->ic_headroom + sizeof(struct ieee80211_frame), 2241 sizeof(uint16_t) 2242 + sizeof(uint16_t) 2243 + IEEE80211_ADDR_LEN 2244 + 2 + IEEE80211_NWID_LEN 2245 + 2 + IEEE80211_RATE_SIZE 2246 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2247 + 4 2248 + 2 + 26 2249 + sizeof(struct ieee80211_wme_info) 2250 + sizeof(struct ieee80211_ie_htcap) 2251 + 4 + sizeof(struct ieee80211_ie_htcap) 2252#ifdef IEEE80211_SUPPORT_SUPERG 2253 + sizeof(struct ieee80211_ath_ie) 2254#endif 2255 + (vap->iv_appie_wpa != NULL ? 2256 vap->iv_appie_wpa->ie_len : 0) 2257 + (vap->iv_appie_assocreq != NULL ? 2258 vap->iv_appie_assocreq->ie_len : 0) 2259 ); 2260 if (m == NULL) 2261 senderr(ENOMEM, is_tx_nobuf); 2262 2263 KASSERT(vap->iv_opmode == IEEE80211_M_STA, 2264 ("wrong mode %u", vap->iv_opmode)); 2265 capinfo = IEEE80211_CAPINFO_ESS; 2266 if (vap->iv_flags & IEEE80211_F_PRIVACY) 2267 capinfo |= IEEE80211_CAPINFO_PRIVACY; 2268 /* 2269 * NB: Some 11a AP's reject the request when 2270 * short premable is set. 2271 */ 2272 if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && 2273 IEEE80211_IS_CHAN_2GHZ(ic->ic_curchan)) 2274 capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE; 2275 if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 2276 (ic->ic_caps & IEEE80211_C_SHSLOT)) 2277 capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME; 2278 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SPECTRUM_MGMT) && 2279 (vap->iv_flags & IEEE80211_F_DOTH)) 2280 capinfo |= IEEE80211_CAPINFO_SPECTRUM_MGMT; 2281 *(uint16_t *)frm = htole16(capinfo); 2282 frm += 2; 2283 2284 KASSERT(bss->ni_intval != 0, ("beacon interval is zero!")); 2285 *(uint16_t *)frm = htole16(howmany(ic->ic_lintval, 2286 bss->ni_intval)); 2287 frm += 2; 2288 2289 if (type == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) { 2290 IEEE80211_ADDR_COPY(frm, bss->ni_bssid); 2291 frm += IEEE80211_ADDR_LEN; 2292 } 2293 2294 frm = ieee80211_add_ssid(frm, ni->ni_essid, ni->ni_esslen); 2295 frm = ieee80211_add_rates(frm, &ni->ni_rates); 2296 frm = ieee80211_add_rsn(frm, vap); 2297 frm = ieee80211_add_xrates(frm, &ni->ni_rates); 2298 if (capinfo & IEEE80211_CAPINFO_SPECTRUM_MGMT) { 2299 frm = ieee80211_add_powercapability(frm, 2300 ic->ic_curchan); 2301 frm = ieee80211_add_supportedchannels(frm, ic); 2302 } 2303 if ((vap->iv_flags_ht & IEEE80211_FHT_HT) && 2304 ni->ni_ies.htcap_ie != NULL && 2305 ni->ni_ies.htcap_ie[0] == IEEE80211_ELEMID_HTCAP) 2306 frm = ieee80211_add_htcap(frm, ni); 2307 frm = ieee80211_add_wpa(frm, vap); 2308 if ((ic->ic_flags & IEEE80211_F_WME) && 2309 ni->ni_ies.wme_ie != NULL) 2310 frm = ieee80211_add_wme_info(frm, &ic->ic_wme); 2311 if ((vap->iv_flags_ht & IEEE80211_FHT_HT) && 2312 ni->ni_ies.htcap_ie != NULL && 2313 ni->ni_ies.htcap_ie[0] == IEEE80211_ELEMID_VENDOR) 2314 frm = ieee80211_add_htcap_vendor(frm, ni); 2315#ifdef IEEE80211_SUPPORT_SUPERG 2316 if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS)) { 2317 frm = ieee80211_add_ath(frm, 2318 IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS), 2319 ((vap->iv_flags & IEEE80211_F_WPA) == 0 && 2320 ni->ni_authmode != IEEE80211_AUTH_8021X) ? 2321 vap->iv_def_txkey : IEEE80211_KEYIX_NONE); 2322 } 2323#endif /* IEEE80211_SUPPORT_SUPERG */ 2324 if (vap->iv_appie_assocreq != NULL) 2325 frm = add_appie(frm, vap->iv_appie_assocreq); 2326 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2327 2328 ieee80211_add_callback(m, ieee80211_tx_mgt_cb, 2329 (void *) vap->iv_state); 2330 break; 2331 2332 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 2333 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 2334 /* 2335 * asresp frame format 2336 * [2] capability information 2337 * [2] status 2338 * [2] association ID 2339 * [tlv] supported rates 2340 * [tlv] extended supported rates 2341 * [tlv] HT capabilities (standard, if STA enabled) 2342 * [tlv] HT information (standard, if STA enabled) 2343 * [tlv] WME (if configured and STA enabled) 2344 * [tlv] HT capabilities (vendor OUI, if STA enabled) 2345 * [tlv] HT information (vendor OUI, if STA enabled) 2346 * [tlv] Atheros capabilities (if STA enabled) 2347 * [tlv] AppIE's (optional) 2348 */ 2349 m = ieee80211_getmgtframe(&frm, 2350 ic->ic_headroom + sizeof(struct ieee80211_frame), 2351 sizeof(uint16_t) 2352 + sizeof(uint16_t) 2353 + sizeof(uint16_t) 2354 + 2 + IEEE80211_RATE_SIZE 2355 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2356 + sizeof(struct ieee80211_ie_htcap) + 4 2357 + sizeof(struct ieee80211_ie_htinfo) + 4 2358 + sizeof(struct ieee80211_wme_param) 2359#ifdef IEEE80211_SUPPORT_SUPERG 2360 + sizeof(struct ieee80211_ath_ie) 2361#endif 2362 + (vap->iv_appie_assocresp != NULL ? 2363 vap->iv_appie_assocresp->ie_len : 0) 2364 ); 2365 if (m == NULL) 2366 senderr(ENOMEM, is_tx_nobuf); 2367 2368 capinfo = ieee80211_getcapinfo(vap, bss->ni_chan); 2369 *(uint16_t *)frm = htole16(capinfo); 2370 frm += 2; 2371 2372 *(uint16_t *)frm = htole16(arg); /* status */ 2373 frm += 2; 2374 2375 if (arg == IEEE80211_STATUS_SUCCESS) { 2376 *(uint16_t *)frm = htole16(ni->ni_associd); 2377 IEEE80211_NODE_STAT(ni, tx_assoc); 2378 } else 2379 IEEE80211_NODE_STAT(ni, tx_assoc_fail); 2380 frm += 2; 2381 2382 frm = ieee80211_add_rates(frm, &ni->ni_rates); 2383 frm = ieee80211_add_xrates(frm, &ni->ni_rates); 2384 /* NB: respond according to what we received */ 2385 if ((ni->ni_flags & HTFLAGS) == IEEE80211_NODE_HT) { 2386 frm = ieee80211_add_htcap(frm, ni); 2387 frm = ieee80211_add_htinfo(frm, ni); 2388 } 2389 if ((vap->iv_flags & IEEE80211_F_WME) && 2390 ni->ni_ies.wme_ie != NULL) 2391 frm = ieee80211_add_wme_param(frm, &ic->ic_wme); 2392 if ((ni->ni_flags & HTFLAGS) == HTFLAGS) { 2393 frm = ieee80211_add_htcap_vendor(frm, ni); 2394 frm = ieee80211_add_htinfo_vendor(frm, ni); 2395 } 2396#ifdef IEEE80211_SUPPORT_SUPERG 2397 if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS)) 2398 frm = ieee80211_add_ath(frm, 2399 IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS), 2400 ((vap->iv_flags & IEEE80211_F_WPA) == 0 && 2401 ni->ni_authmode != IEEE80211_AUTH_8021X) ? 2402 vap->iv_def_txkey : IEEE80211_KEYIX_NONE); 2403#endif /* IEEE80211_SUPPORT_SUPERG */ 2404 if (vap->iv_appie_assocresp != NULL) 2405 frm = add_appie(frm, vap->iv_appie_assocresp); 2406 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2407 break; 2408 2409 case IEEE80211_FC0_SUBTYPE_DISASSOC: 2410 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 2411 "send station disassociate (reason %d)", arg); 2412 m = ieee80211_getmgtframe(&frm, 2413 ic->ic_headroom + sizeof(struct ieee80211_frame), 2414 sizeof(uint16_t)); 2415 if (m == NULL) 2416 senderr(ENOMEM, is_tx_nobuf); 2417 *(uint16_t *)frm = htole16(arg); /* reason */ 2418 m->m_pkthdr.len = m->m_len = sizeof(uint16_t); 2419 2420 IEEE80211_NODE_STAT(ni, tx_disassoc); 2421 IEEE80211_NODE_STAT_SET(ni, tx_disassoc_code, arg); 2422 break; 2423 2424 default: 2425 IEEE80211_NOTE(vap, IEEE80211_MSG_ANY, ni, 2426 "invalid mgmt frame type %u", type); 2427 senderr(EINVAL, is_tx_unknownmgt); 2428 /* NOTREACHED */ 2429 } 2430 2431 /* NB: force non-ProbeResp frames to the highest queue */ 2432 params.ibp_pri = WME_AC_VO; 2433 params.ibp_rate0 = bss->ni_txparms->mgmtrate; 2434 /* NB: we know all frames are unicast */ 2435 params.ibp_try0 = bss->ni_txparms->maxretry; 2436 params.ibp_power = bss->ni_txpower; 2437 return ieee80211_mgmt_output(ni, m, type, ¶ms); 2438bad: 2439 ieee80211_free_node(ni); 2440 return ret; 2441#undef senderr 2442#undef HTFLAGS 2443} 2444 2445/* 2446 * Return an mbuf with a probe response frame in it. 2447 * Space is left to prepend and 802.11 header at the 2448 * front but it's left to the caller to fill in. 2449 */ 2450struct mbuf * 2451ieee80211_alloc_proberesp(struct ieee80211_node *bss, int legacy) 2452{ 2453 struct ieee80211vap *vap = bss->ni_vap; 2454 struct ieee80211com *ic = bss->ni_ic; 2455 const struct ieee80211_rateset *rs; 2456 struct mbuf *m; 2457 uint16_t capinfo; 2458 uint8_t *frm; 2459 2460 /* 2461 * probe response frame format 2462 * [8] time stamp 2463 * [2] beacon interval 2464 * [2] cabability information 2465 * [tlv] ssid 2466 * [tlv] supported rates 2467 * [tlv] parameter set (FH/DS) 2468 * [tlv] parameter set (IBSS) 2469 * [tlv] country (optional) 2470 * [3] power control (optional) 2471 * [5] channel switch announcement (CSA) (optional) 2472 * [tlv] extended rate phy (ERP) 2473 * [tlv] extended supported rates 2474 * [tlv] RSN (optional) 2475 * [tlv] HT capabilities 2476 * [tlv] HT information 2477 * [tlv] WPA (optional) 2478 * [tlv] WME (optional) 2479 * [tlv] Vendor OUI HT capabilities (optional) 2480 * [tlv] Vendor OUI HT information (optional) 2481 * [tlv] Atheros capabilities 2482 * [tlv] AppIE's (optional) 2483 * [tlv] Mesh ID (MBSS) 2484 * [tlv] Mesh Conf (MBSS) 2485 */ 2486 m = ieee80211_getmgtframe(&frm, 2487 ic->ic_headroom + sizeof(struct ieee80211_frame), 2488 8 2489 + sizeof(uint16_t) 2490 + sizeof(uint16_t) 2491 + 2 + IEEE80211_NWID_LEN 2492 + 2 + IEEE80211_RATE_SIZE 2493 + 7 /* max(7,3) */ 2494 + IEEE80211_COUNTRY_MAX_SIZE 2495 + 3 2496 + sizeof(struct ieee80211_csa_ie) 2497 + sizeof(struct ieee80211_quiet_ie) 2498 + 3 2499 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2500 + sizeof(struct ieee80211_ie_wpa) 2501 + sizeof(struct ieee80211_ie_htcap) 2502 + sizeof(struct ieee80211_ie_htinfo) 2503 + sizeof(struct ieee80211_ie_wpa) 2504 + sizeof(struct ieee80211_wme_param) 2505 + 4 + sizeof(struct ieee80211_ie_htcap) 2506 + 4 + sizeof(struct ieee80211_ie_htinfo) 2507#ifdef IEEE80211_SUPPORT_SUPERG 2508 + sizeof(struct ieee80211_ath_ie) 2509#endif 2510#ifdef IEEE80211_SUPPORT_MESH 2511 + 2 + IEEE80211_MESHID_LEN 2512 + sizeof(struct ieee80211_meshconf_ie) 2513#endif 2514 + (vap->iv_appie_proberesp != NULL ? 2515 vap->iv_appie_proberesp->ie_len : 0) 2516 ); 2517 if (m == NULL) { 2518 vap->iv_stats.is_tx_nobuf++; 2519 return NULL; 2520 } 2521 2522 memset(frm, 0, 8); /* timestamp should be filled later */ 2523 frm += 8; 2524 *(uint16_t *)frm = htole16(bss->ni_intval); 2525 frm += 2; 2526 capinfo = ieee80211_getcapinfo(vap, bss->ni_chan); 2527 *(uint16_t *)frm = htole16(capinfo); 2528 frm += 2; 2529 2530 frm = ieee80211_add_ssid(frm, bss->ni_essid, bss->ni_esslen); 2531 rs = ieee80211_get_suprates(ic, bss->ni_chan); 2532 frm = ieee80211_add_rates(frm, rs); 2533 2534 if (IEEE80211_IS_CHAN_FHSS(bss->ni_chan)) { 2535 *frm++ = IEEE80211_ELEMID_FHPARMS; 2536 *frm++ = 5; 2537 *frm++ = bss->ni_fhdwell & 0x00ff; 2538 *frm++ = (bss->ni_fhdwell >> 8) & 0x00ff; 2539 *frm++ = IEEE80211_FH_CHANSET( 2540 ieee80211_chan2ieee(ic, bss->ni_chan)); 2541 *frm++ = IEEE80211_FH_CHANPAT( 2542 ieee80211_chan2ieee(ic, bss->ni_chan)); 2543 *frm++ = bss->ni_fhindex; 2544 } else { 2545 *frm++ = IEEE80211_ELEMID_DSPARMS; 2546 *frm++ = 1; 2547 *frm++ = ieee80211_chan2ieee(ic, bss->ni_chan); 2548 } 2549 2550 if (vap->iv_opmode == IEEE80211_M_IBSS) { 2551 *frm++ = IEEE80211_ELEMID_IBSSPARMS; 2552 *frm++ = 2; 2553 *frm++ = 0; *frm++ = 0; /* TODO: ATIM window */ 2554 } 2555 if ((vap->iv_flags & IEEE80211_F_DOTH) || 2556 (vap->iv_flags_ext & IEEE80211_FEXT_DOTD)) 2557 frm = ieee80211_add_countryie(frm, ic); 2558 if (vap->iv_flags & IEEE80211_F_DOTH) { 2559 if (IEEE80211_IS_CHAN_5GHZ(bss->ni_chan)) 2560 frm = ieee80211_add_powerconstraint(frm, vap); 2561 if (ic->ic_flags & IEEE80211_F_CSAPENDING) 2562 frm = ieee80211_add_csa(frm, vap); 2563 } 2564 if (vap->iv_flags & IEEE80211_F_DOTH) { 2565 if (IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) && 2566 (vap->iv_flags_ext & IEEE80211_FEXT_DFS)) { 2567 if (vap->iv_quiet) 2568 frm = ieee80211_add_quiet(frm, vap); 2569 } 2570 } 2571 if (IEEE80211_IS_CHAN_ANYG(bss->ni_chan)) 2572 frm = ieee80211_add_erp(frm, ic); 2573 frm = ieee80211_add_xrates(frm, rs); 2574 frm = ieee80211_add_rsn(frm, vap); 2575 /* 2576 * NB: legacy 11b clients do not get certain ie's. 2577 * The caller identifies such clients by passing 2578 * a token in legacy to us. Could expand this to be 2579 * any legacy client for stuff like HT ie's. 2580 */ 2581 if (IEEE80211_IS_CHAN_HT(bss->ni_chan) && 2582 legacy != IEEE80211_SEND_LEGACY_11B) { 2583 frm = ieee80211_add_htcap(frm, bss); 2584 frm = ieee80211_add_htinfo(frm, bss); 2585 } 2586 frm = ieee80211_add_wpa(frm, vap); 2587 if (vap->iv_flags & IEEE80211_F_WME) 2588 frm = ieee80211_add_wme_param(frm, &ic->ic_wme); 2589 if (IEEE80211_IS_CHAN_HT(bss->ni_chan) && 2590 (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) && 2591 legacy != IEEE80211_SEND_LEGACY_11B) { 2592 frm = ieee80211_add_htcap_vendor(frm, bss); 2593 frm = ieee80211_add_htinfo_vendor(frm, bss); 2594 } 2595#ifdef IEEE80211_SUPPORT_SUPERG 2596 if ((vap->iv_flags & IEEE80211_F_ATHEROS) && 2597 legacy != IEEE80211_SEND_LEGACY_11B) 2598 frm = ieee80211_add_athcaps(frm, bss); 2599#endif 2600 if (vap->iv_appie_proberesp != NULL) 2601 frm = add_appie(frm, vap->iv_appie_proberesp); 2602#ifdef IEEE80211_SUPPORT_MESH 2603 if (vap->iv_opmode == IEEE80211_M_MBSS) { 2604 frm = ieee80211_add_meshid(frm, vap); 2605 frm = ieee80211_add_meshconf(frm, vap); 2606 } 2607#endif 2608 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2609 2610 return m; 2611} 2612 2613/* 2614 * Send a probe response frame to the specified mac address. 2615 * This does not go through the normal mgt frame api so we 2616 * can specify the destination address and re-use the bss node 2617 * for the sta reference. 2618 */ 2619int 2620ieee80211_send_proberesp(struct ieee80211vap *vap, 2621 const uint8_t da[IEEE80211_ADDR_LEN], int legacy) 2622{ 2623 struct ieee80211_node *bss = vap->iv_bss; 2624 struct ieee80211com *ic = vap->iv_ic; 2625 struct ieee80211_frame *wh; 2626 struct mbuf *m; 2627 int ret; 2628 2629 if (vap->iv_state == IEEE80211_S_CAC) { 2630 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, bss, 2631 "block %s frame in CAC state", "probe response"); 2632 vap->iv_stats.is_tx_badstate++; 2633 return EIO; /* XXX */ 2634 } 2635 2636 /* 2637 * Hold a reference on the node so it doesn't go away until after 2638 * the xmit is complete all the way in the driver. On error we 2639 * will remove our reference. 2640 */ 2641 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2642 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", 2643 __func__, __LINE__, bss, ether_sprintf(bss->ni_macaddr), 2644 ieee80211_node_refcnt(bss)+1); 2645 ieee80211_ref_node(bss); 2646 2647 m = ieee80211_alloc_proberesp(bss, legacy); 2648 if (m == NULL) { 2649 ieee80211_free_node(bss); 2650 return ENOMEM; 2651 } 2652 2653 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); 2654 KASSERT(m != NULL, ("no room for header")); 2655 2656 IEEE80211_TX_LOCK(ic); 2657 wh = mtod(m, struct ieee80211_frame *); 2658 ieee80211_send_setup(bss, m, 2659 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_RESP, 2660 IEEE80211_NONQOS_TID, vap->iv_myaddr, da, bss->ni_bssid); 2661 /* XXX power management? */ 2662 m->m_flags |= M_ENCAP; /* mark encapsulated */ 2663 2664 M_WME_SETAC(m, WME_AC_BE); 2665 2666 IEEE80211_DPRINTF(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS, 2667 "send probe resp on channel %u to %s%s\n", 2668 ieee80211_chan2ieee(ic, ic->ic_curchan), ether_sprintf(da), 2669 legacy ? " <legacy>" : ""); 2670 IEEE80211_NODE_STAT(bss, tx_mgmt); 2671 2672 ret = ieee80211_raw_output(vap, bss, m, NULL); 2673 IEEE80211_TX_UNLOCK(ic); 2674 return (ret); 2675} 2676 2677/* 2678 * Allocate and build a RTS (Request To Send) control frame. 2679 */ 2680struct mbuf * 2681ieee80211_alloc_rts(struct ieee80211com *ic, 2682 const uint8_t ra[IEEE80211_ADDR_LEN], 2683 const uint8_t ta[IEEE80211_ADDR_LEN], 2684 uint16_t dur) 2685{ 2686 struct ieee80211_frame_rts *rts; 2687 struct mbuf *m; 2688 2689 /* XXX honor ic_headroom */ 2690 m = m_gethdr(M_NOWAIT, MT_DATA); 2691 if (m != NULL) { 2692 rts = mtod(m, struct ieee80211_frame_rts *); 2693 rts->i_fc[0] = IEEE80211_FC0_VERSION_0 | 2694 IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_RTS; 2695 rts->i_fc[1] = IEEE80211_FC1_DIR_NODS; 2696 *(u_int16_t *)rts->i_dur = htole16(dur); 2697 IEEE80211_ADDR_COPY(rts->i_ra, ra); 2698 IEEE80211_ADDR_COPY(rts->i_ta, ta); 2699 2700 m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_rts); 2701 } 2702 return m; 2703} 2704 2705/* 2706 * Allocate and build a CTS (Clear To Send) control frame. 2707 */ 2708struct mbuf * 2709ieee80211_alloc_cts(struct ieee80211com *ic, 2710 const uint8_t ra[IEEE80211_ADDR_LEN], uint16_t dur) 2711{ 2712 struct ieee80211_frame_cts *cts; 2713 struct mbuf *m; 2714 2715 /* XXX honor ic_headroom */ 2716 m = m_gethdr(M_NOWAIT, MT_DATA); 2717 if (m != NULL) { 2718 cts = mtod(m, struct ieee80211_frame_cts *); 2719 cts->i_fc[0] = IEEE80211_FC0_VERSION_0 | 2720 IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_CTS; 2721 cts->i_fc[1] = IEEE80211_FC1_DIR_NODS; 2722 *(u_int16_t *)cts->i_dur = htole16(dur); 2723 IEEE80211_ADDR_COPY(cts->i_ra, ra); 2724 2725 m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_cts); 2726 } 2727 return m; 2728} 2729 2730static void 2731ieee80211_tx_mgt_timeout(void *arg) 2732{ 2733 struct ieee80211_node *ni = arg; 2734 struct ieee80211vap *vap = ni->ni_vap; 2735 2736 if (vap->iv_state != IEEE80211_S_INIT && 2737 (vap->iv_ic->ic_flags & IEEE80211_F_SCAN) == 0) { 2738 /* 2739 * NB: it's safe to specify a timeout as the reason here; 2740 * it'll only be used in the right state. 2741 */ 2742 ieee80211_new_state(vap, IEEE80211_S_SCAN, 2743 IEEE80211_SCAN_FAIL_TIMEOUT); 2744 } 2745} 2746 2747static void 2748ieee80211_tx_mgt_cb(struct ieee80211_node *ni, void *arg, int status) 2749{ 2750 struct ieee80211vap *vap = ni->ni_vap; 2751 enum ieee80211_state ostate = (enum ieee80211_state) arg; 2752 2753 /* 2754 * Frame transmit completed; arrange timer callback. If 2755 * transmit was successfuly we wait for response. Otherwise 2756 * we arrange an immediate callback instead of doing the 2757 * callback directly since we don't know what state the driver 2758 * is in (e.g. what locks it is holding). This work should 2759 * not be too time-critical and not happen too often so the 2760 * added overhead is acceptable. 2761 * 2762 * XXX what happens if !acked but response shows up before callback? 2763 */ 2764 if (vap->iv_state == ostate) 2765 callout_reset(&vap->iv_mgtsend, 2766 status == 0 ? IEEE80211_TRANS_WAIT*hz : 0, 2767 ieee80211_tx_mgt_timeout, ni); 2768} 2769 2770static void 2771ieee80211_beacon_construct(struct mbuf *m, uint8_t *frm, 2772 struct ieee80211_beacon_offsets *bo, struct ieee80211_node *ni) 2773{ 2774 struct ieee80211vap *vap = ni->ni_vap; 2775 struct ieee80211com *ic = ni->ni_ic; 2776 struct ieee80211_rateset *rs = &ni->ni_rates; 2777 uint16_t capinfo; 2778 2779 /* 2780 * beacon frame format 2781 * [8] time stamp 2782 * [2] beacon interval 2783 * [2] cabability information 2784 * [tlv] ssid 2785 * [tlv] supported rates 2786 * [3] parameter set (DS) 2787 * [8] CF parameter set (optional) 2788 * [tlv] parameter set (IBSS/TIM) 2789 * [tlv] country (optional) 2790 * [3] power control (optional) 2791 * [5] channel switch announcement (CSA) (optional) 2792 * [tlv] extended rate phy (ERP) 2793 * [tlv] extended supported rates 2794 * [tlv] RSN parameters 2795 * [tlv] HT capabilities 2796 * [tlv] HT information 2797 * XXX Vendor-specific OIDs (e.g. Atheros) 2798 * [tlv] WPA parameters 2799 * [tlv] WME parameters 2800 * [tlv] Vendor OUI HT capabilities (optional) 2801 * [tlv] Vendor OUI HT information (optional) 2802 * [tlv] Atheros capabilities (optional) 2803 * [tlv] TDMA parameters (optional) 2804 * [tlv] Mesh ID (MBSS) 2805 * [tlv] Mesh Conf (MBSS) 2806 * [tlv] application data (optional) 2807 */ 2808 2809 memset(bo, 0, sizeof(*bo)); 2810 2811 memset(frm, 0, 8); /* XXX timestamp is set by hardware/driver */ 2812 frm += 8; 2813 *(uint16_t *)frm = htole16(ni->ni_intval); 2814 frm += 2; 2815 capinfo = ieee80211_getcapinfo(vap, ni->ni_chan); 2816 bo->bo_caps = (uint16_t *)frm; 2817 *(uint16_t *)frm = htole16(capinfo); 2818 frm += 2; 2819 *frm++ = IEEE80211_ELEMID_SSID; 2820 if ((vap->iv_flags & IEEE80211_F_HIDESSID) == 0) { 2821 *frm++ = ni->ni_esslen; 2822 memcpy(frm, ni->ni_essid, ni->ni_esslen); 2823 frm += ni->ni_esslen; 2824 } else 2825 *frm++ = 0; 2826 frm = ieee80211_add_rates(frm, rs); 2827 if (!IEEE80211_IS_CHAN_FHSS(ni->ni_chan)) { 2828 *frm++ = IEEE80211_ELEMID_DSPARMS; 2829 *frm++ = 1; 2830 *frm++ = ieee80211_chan2ieee(ic, ni->ni_chan); 2831 } 2832 if (ic->ic_flags & IEEE80211_F_PCF) { 2833 bo->bo_cfp = frm; 2834 frm = ieee80211_add_cfparms(frm, ic); 2835 } 2836 bo->bo_tim = frm; 2837 if (vap->iv_opmode == IEEE80211_M_IBSS) { 2838 *frm++ = IEEE80211_ELEMID_IBSSPARMS; 2839 *frm++ = 2; 2840 *frm++ = 0; *frm++ = 0; /* TODO: ATIM window */ 2841 bo->bo_tim_len = 0; 2842 } else if (vap->iv_opmode == IEEE80211_M_HOSTAP || 2843 vap->iv_opmode == IEEE80211_M_MBSS) { 2844 /* TIM IE is the same for Mesh and Hostap */ 2845 struct ieee80211_tim_ie *tie = (struct ieee80211_tim_ie *) frm; 2846 2847 tie->tim_ie = IEEE80211_ELEMID_TIM; 2848 tie->tim_len = 4; /* length */ 2849 tie->tim_count = 0; /* DTIM count */ 2850 tie->tim_period = vap->iv_dtim_period; /* DTIM period */ 2851 tie->tim_bitctl = 0; /* bitmap control */ 2852 tie->tim_bitmap[0] = 0; /* Partial Virtual Bitmap */ 2853 frm += sizeof(struct ieee80211_tim_ie); 2854 bo->bo_tim_len = 1; 2855 } 2856 bo->bo_tim_trailer = frm; 2857 if ((vap->iv_flags & IEEE80211_F_DOTH) || 2858 (vap->iv_flags_ext & IEEE80211_FEXT_DOTD)) 2859 frm = ieee80211_add_countryie(frm, ic); 2860 if (vap->iv_flags & IEEE80211_F_DOTH) { 2861 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 2862 frm = ieee80211_add_powerconstraint(frm, vap); 2863 bo->bo_csa = frm; 2864 if (ic->ic_flags & IEEE80211_F_CSAPENDING) 2865 frm = ieee80211_add_csa(frm, vap); 2866 } else 2867 bo->bo_csa = frm; 2868 2869 if (vap->iv_flags & IEEE80211_F_DOTH) { 2870 bo->bo_quiet = frm; 2871 if (IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) && 2872 (vap->iv_flags_ext & IEEE80211_FEXT_DFS)) { 2873 if (vap->iv_quiet) 2874 frm = ieee80211_add_quiet(frm,vap); 2875 } 2876 } else 2877 bo->bo_quiet = frm; 2878 2879 if (IEEE80211_IS_CHAN_ANYG(ni->ni_chan)) { 2880 bo->bo_erp = frm; 2881 frm = ieee80211_add_erp(frm, ic); 2882 } 2883 frm = ieee80211_add_xrates(frm, rs); 2884 frm = ieee80211_add_rsn(frm, vap); 2885 if (IEEE80211_IS_CHAN_HT(ni->ni_chan)) { 2886 frm = ieee80211_add_htcap(frm, ni); 2887 bo->bo_htinfo = frm; 2888 frm = ieee80211_add_htinfo(frm, ni); 2889 } 2890 frm = ieee80211_add_wpa(frm, vap); 2891 if (vap->iv_flags & IEEE80211_F_WME) { 2892 bo->bo_wme = frm; 2893 frm = ieee80211_add_wme_param(frm, &ic->ic_wme); 2894 } 2895 if (IEEE80211_IS_CHAN_HT(ni->ni_chan) && 2896 (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT)) { 2897 frm = ieee80211_add_htcap_vendor(frm, ni); 2898 frm = ieee80211_add_htinfo_vendor(frm, ni); 2899 } 2900#ifdef IEEE80211_SUPPORT_SUPERG 2901 if (vap->iv_flags & IEEE80211_F_ATHEROS) { 2902 bo->bo_ath = frm; 2903 frm = ieee80211_add_athcaps(frm, ni); 2904 } 2905#endif 2906#ifdef IEEE80211_SUPPORT_TDMA 2907 if (vap->iv_caps & IEEE80211_C_TDMA) { 2908 bo->bo_tdma = frm; 2909 frm = ieee80211_add_tdma(frm, vap); 2910 } 2911#endif 2912 if (vap->iv_appie_beacon != NULL) { 2913 bo->bo_appie = frm; 2914 bo->bo_appie_len = vap->iv_appie_beacon->ie_len; 2915 frm = add_appie(frm, vap->iv_appie_beacon); 2916 } 2917#ifdef IEEE80211_SUPPORT_MESH 2918 if (vap->iv_opmode == IEEE80211_M_MBSS) { 2919 frm = ieee80211_add_meshid(frm, vap); 2920 bo->bo_meshconf = frm; 2921 frm = ieee80211_add_meshconf(frm, vap); 2922 } 2923#endif 2924 bo->bo_tim_trailer_len = frm - bo->bo_tim_trailer; 2925 bo->bo_csa_trailer_len = frm - bo->bo_csa; 2926 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2927} 2928 2929/* 2930 * Allocate a beacon frame and fillin the appropriate bits. 2931 */ 2932struct mbuf * 2933ieee80211_beacon_alloc(struct ieee80211_node *ni, 2934 struct ieee80211_beacon_offsets *bo) 2935{ 2936 struct ieee80211vap *vap = ni->ni_vap; 2937 struct ieee80211com *ic = ni->ni_ic; 2938 struct ifnet *ifp = vap->iv_ifp; 2939 struct ieee80211_frame *wh; 2940 struct mbuf *m; 2941 int pktlen; 2942 uint8_t *frm; 2943 2944 /* 2945 * beacon frame format 2946 * [8] time stamp 2947 * [2] beacon interval 2948 * [2] cabability information 2949 * [tlv] ssid 2950 * [tlv] supported rates 2951 * [3] parameter set (DS) 2952 * [8] CF parameter set (optional) 2953 * [tlv] parameter set (IBSS/TIM) 2954 * [tlv] country (optional) 2955 * [3] power control (optional) 2956 * [5] channel switch announcement (CSA) (optional) 2957 * [tlv] extended rate phy (ERP) 2958 * [tlv] extended supported rates 2959 * [tlv] RSN parameters 2960 * [tlv] HT capabilities 2961 * [tlv] HT information 2962 * [tlv] Vendor OUI HT capabilities (optional) 2963 * [tlv] Vendor OUI HT information (optional) 2964 * XXX Vendor-specific OIDs (e.g. Atheros) 2965 * [tlv] WPA parameters 2966 * [tlv] WME parameters 2967 * [tlv] TDMA parameters (optional) 2968 * [tlv] Mesh ID (MBSS) 2969 * [tlv] Mesh Conf (MBSS) 2970 * [tlv] application data (optional) 2971 * NB: we allocate the max space required for the TIM bitmap. 2972 * XXX how big is this? 2973 */ 2974 pktlen = 8 /* time stamp */ 2975 + sizeof(uint16_t) /* beacon interval */ 2976 + sizeof(uint16_t) /* capabilities */ 2977 + 2 + ni->ni_esslen /* ssid */ 2978 + 2 + IEEE80211_RATE_SIZE /* supported rates */ 2979 + 2 + 1 /* DS parameters */ 2980 + 2 + 6 /* CF parameters */ 2981 + 2 + 4 + vap->iv_tim_len /* DTIM/IBSSPARMS */ 2982 + IEEE80211_COUNTRY_MAX_SIZE /* country */ 2983 + 2 + 1 /* power control */ 2984 + sizeof(struct ieee80211_csa_ie) /* CSA */ 2985 + sizeof(struct ieee80211_quiet_ie) /* Quiet */ 2986 + 2 + 1 /* ERP */ 2987 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2988 + (vap->iv_caps & IEEE80211_C_WPA ? /* WPA 1+2 */ 2989 2*sizeof(struct ieee80211_ie_wpa) : 0) 2990 /* XXX conditional? */ 2991 + 4+2*sizeof(struct ieee80211_ie_htcap)/* HT caps */ 2992 + 4+2*sizeof(struct ieee80211_ie_htinfo)/* HT info */ 2993 + (vap->iv_caps & IEEE80211_C_WME ? /* WME */ 2994 sizeof(struct ieee80211_wme_param) : 0) 2995#ifdef IEEE80211_SUPPORT_SUPERG 2996 + sizeof(struct ieee80211_ath_ie) /* ATH */ 2997#endif 2998#ifdef IEEE80211_SUPPORT_TDMA 2999 + (vap->iv_caps & IEEE80211_C_TDMA ? /* TDMA */ 3000 sizeof(struct ieee80211_tdma_param) : 0) 3001#endif 3002#ifdef IEEE80211_SUPPORT_MESH 3003 + 2 + ni->ni_meshidlen 3004 + sizeof(struct ieee80211_meshconf_ie) 3005#endif 3006 + IEEE80211_MAX_APPIE 3007 ; 3008 m = ieee80211_getmgtframe(&frm, 3009 ic->ic_headroom + sizeof(struct ieee80211_frame), pktlen); 3010 if (m == NULL) { 3011 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY, 3012 "%s: cannot get buf; size %u\n", __func__, pktlen); 3013 vap->iv_stats.is_tx_nobuf++; 3014 return NULL; 3015 } 3016 ieee80211_beacon_construct(m, frm, bo, ni); 3017 3018 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); 3019 KASSERT(m != NULL, ("no space for 802.11 header?")); 3020 wh = mtod(m, struct ieee80211_frame *); 3021 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT | 3022 IEEE80211_FC0_SUBTYPE_BEACON; 3023 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 3024 *(uint16_t *)wh->i_dur = 0; 3025 IEEE80211_ADDR_COPY(wh->i_addr1, ifp->if_broadcastaddr); 3026 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); 3027 IEEE80211_ADDR_COPY(wh->i_addr3, ni->ni_bssid); 3028 *(uint16_t *)wh->i_seq = 0; 3029 3030 return m; 3031} 3032 3033/* 3034 * Update the dynamic parts of a beacon frame based on the current state. 3035 */ 3036int 3037ieee80211_beacon_update(struct ieee80211_node *ni, 3038 struct ieee80211_beacon_offsets *bo, struct mbuf *m, int mcast) 3039{ 3040 struct ieee80211vap *vap = ni->ni_vap; 3041 struct ieee80211com *ic = ni->ni_ic; 3042 int len_changed = 0; 3043 uint16_t capinfo; 3044 struct ieee80211_frame *wh; 3045 ieee80211_seq seqno; 3046 3047 IEEE80211_LOCK(ic); 3048 /* 3049 * Handle 11h channel change when we've reached the count. 3050 * We must recalculate the beacon frame contents to account 3051 * for the new channel. Note we do this only for the first 3052 * vap that reaches this point; subsequent vaps just update 3053 * their beacon state to reflect the recalculated channel. 3054 */ 3055 if (isset(bo->bo_flags, IEEE80211_BEACON_CSA) && 3056 vap->iv_csa_count == ic->ic_csa_count) { 3057 vap->iv_csa_count = 0; 3058 /* 3059 * Effect channel change before reconstructing the beacon 3060 * frame contents as many places reference ni_chan. 3061 */ 3062 if (ic->ic_csa_newchan != NULL) 3063 ieee80211_csa_completeswitch(ic); 3064 /* 3065 * NB: ieee80211_beacon_construct clears all pending 3066 * updates in bo_flags so we don't need to explicitly 3067 * clear IEEE80211_BEACON_CSA. 3068 */ 3069 ieee80211_beacon_construct(m, 3070 mtod(m, uint8_t*) + sizeof(struct ieee80211_frame), bo, ni); 3071 3072 /* XXX do WME aggressive mode processing? */ 3073 IEEE80211_UNLOCK(ic); 3074 return 1; /* just assume length changed */ 3075 } 3076 3077 wh = mtod(m, struct ieee80211_frame *); 3078 seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]++; 3079 *(uint16_t *)&wh->i_seq[0] = 3080 htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); 3081 M_SEQNO_SET(m, seqno); 3082 3083 /* XXX faster to recalculate entirely or just changes? */ 3084 capinfo = ieee80211_getcapinfo(vap, ni->ni_chan); 3085 *bo->bo_caps = htole16(capinfo); 3086 3087 if (vap->iv_flags & IEEE80211_F_WME) { 3088 struct ieee80211_wme_state *wme = &ic->ic_wme; 3089 3090 /* 3091 * Check for agressive mode change. When there is 3092 * significant high priority traffic in the BSS 3093 * throttle back BE traffic by using conservative 3094 * parameters. Otherwise BE uses agressive params 3095 * to optimize performance of legacy/non-QoS traffic. 3096 */ 3097 if (wme->wme_flags & WME_F_AGGRMODE) { 3098 if (wme->wme_hipri_traffic > 3099 wme->wme_hipri_switch_thresh) { 3100 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 3101 "%s: traffic %u, disable aggressive mode\n", 3102 __func__, wme->wme_hipri_traffic); 3103 wme->wme_flags &= ~WME_F_AGGRMODE; 3104 ieee80211_wme_updateparams_locked(vap); 3105 wme->wme_hipri_traffic = 3106 wme->wme_hipri_switch_hysteresis; 3107 } else 3108 wme->wme_hipri_traffic = 0; 3109 } else { 3110 if (wme->wme_hipri_traffic <= 3111 wme->wme_hipri_switch_thresh) { 3112 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 3113 "%s: traffic %u, enable aggressive mode\n", 3114 __func__, wme->wme_hipri_traffic); 3115 wme->wme_flags |= WME_F_AGGRMODE; 3116 ieee80211_wme_updateparams_locked(vap); 3117 wme->wme_hipri_traffic = 0; 3118 } else 3119 wme->wme_hipri_traffic = 3120 wme->wme_hipri_switch_hysteresis; 3121 } 3122 if (isset(bo->bo_flags, IEEE80211_BEACON_WME)) { 3123 (void) ieee80211_add_wme_param(bo->bo_wme, wme); 3124 clrbit(bo->bo_flags, IEEE80211_BEACON_WME); 3125 } 3126 } 3127 3128 if (isset(bo->bo_flags, IEEE80211_BEACON_HTINFO)) { 3129 ieee80211_ht_update_beacon(vap, bo); 3130 clrbit(bo->bo_flags, IEEE80211_BEACON_HTINFO); 3131 } 3132#ifdef IEEE80211_SUPPORT_TDMA 3133 if (vap->iv_caps & IEEE80211_C_TDMA) { 3134 /* 3135 * NB: the beacon is potentially updated every TBTT. 3136 */ 3137 ieee80211_tdma_update_beacon(vap, bo); 3138 } 3139#endif 3140#ifdef IEEE80211_SUPPORT_MESH 3141 if (vap->iv_opmode == IEEE80211_M_MBSS) 3142 ieee80211_mesh_update_beacon(vap, bo); 3143#endif 3144 3145 if (vap->iv_opmode == IEEE80211_M_HOSTAP || 3146 vap->iv_opmode == IEEE80211_M_MBSS) { /* NB: no IBSS support*/ 3147 struct ieee80211_tim_ie *tie = 3148 (struct ieee80211_tim_ie *) bo->bo_tim; 3149 if (isset(bo->bo_flags, IEEE80211_BEACON_TIM)) { 3150 u_int timlen, timoff, i; 3151 /* 3152 * ATIM/DTIM needs updating. If it fits in the 3153 * current space allocated then just copy in the 3154 * new bits. Otherwise we need to move any trailing 3155 * data to make room. Note that we know there is 3156 * contiguous space because ieee80211_beacon_allocate 3157 * insures there is space in the mbuf to write a 3158 * maximal-size virtual bitmap (based on iv_max_aid). 3159 */ 3160 /* 3161 * Calculate the bitmap size and offset, copy any 3162 * trailer out of the way, and then copy in the 3163 * new bitmap and update the information element. 3164 * Note that the tim bitmap must contain at least 3165 * one byte and any offset must be even. 3166 */ 3167 if (vap->iv_ps_pending != 0) { 3168 timoff = 128; /* impossibly large */ 3169 for (i = 0; i < vap->iv_tim_len; i++) 3170 if (vap->iv_tim_bitmap[i]) { 3171 timoff = i &~ 1; 3172 break; 3173 } 3174 KASSERT(timoff != 128, ("tim bitmap empty!")); 3175 for (i = vap->iv_tim_len-1; i >= timoff; i--) 3176 if (vap->iv_tim_bitmap[i]) 3177 break; 3178 timlen = 1 + (i - timoff); 3179 } else { 3180 timoff = 0; 3181 timlen = 1; 3182 } 3183 if (timlen != bo->bo_tim_len) { 3184 /* copy up/down trailer */ 3185 int adjust = tie->tim_bitmap+timlen 3186 - bo->bo_tim_trailer; 3187 ovbcopy(bo->bo_tim_trailer, 3188 bo->bo_tim_trailer+adjust, 3189 bo->bo_tim_trailer_len); 3190 bo->bo_tim_trailer += adjust; 3191 bo->bo_erp += adjust; 3192 bo->bo_htinfo += adjust; 3193#ifdef IEEE80211_SUPPORT_SUPERG 3194 bo->bo_ath += adjust; 3195#endif 3196#ifdef IEEE80211_SUPPORT_TDMA 3197 bo->bo_tdma += adjust; 3198#endif 3199#ifdef IEEE80211_SUPPORT_MESH 3200 bo->bo_meshconf += adjust; 3201#endif 3202 bo->bo_appie += adjust; 3203 bo->bo_wme += adjust; 3204 bo->bo_csa += adjust; 3205 bo->bo_quiet += adjust; 3206 bo->bo_tim_len = timlen; 3207 3208 /* update information element */ 3209 tie->tim_len = 3 + timlen; 3210 tie->tim_bitctl = timoff; 3211 len_changed = 1; 3212 } 3213 memcpy(tie->tim_bitmap, vap->iv_tim_bitmap + timoff, 3214 bo->bo_tim_len); 3215 3216 clrbit(bo->bo_flags, IEEE80211_BEACON_TIM); 3217 3218 IEEE80211_DPRINTF(vap, IEEE80211_MSG_POWER, 3219 "%s: TIM updated, pending %u, off %u, len %u\n", 3220 __func__, vap->iv_ps_pending, timoff, timlen); 3221 } 3222 /* count down DTIM period */ 3223 if (tie->tim_count == 0) 3224 tie->tim_count = tie->tim_period - 1; 3225 else 3226 tie->tim_count--; 3227 /* update state for buffered multicast frames on DTIM */ 3228 if (mcast && tie->tim_count == 0) 3229 tie->tim_bitctl |= 1; 3230 else 3231 tie->tim_bitctl &= ~1; 3232 if (isset(bo->bo_flags, IEEE80211_BEACON_CSA)) { 3233 struct ieee80211_csa_ie *csa = 3234 (struct ieee80211_csa_ie *) bo->bo_csa; 3235 3236 /* 3237 * Insert or update CSA ie. If we're just starting 3238 * to count down to the channel switch then we need 3239 * to insert the CSA ie. Otherwise we just need to 3240 * drop the count. The actual change happens above 3241 * when the vap's count reaches the target count. 3242 */ 3243 if (vap->iv_csa_count == 0) { 3244 memmove(&csa[1], csa, bo->bo_csa_trailer_len); 3245 bo->bo_erp += sizeof(*csa); 3246 bo->bo_htinfo += sizeof(*csa); 3247 bo->bo_wme += sizeof(*csa); 3248#ifdef IEEE80211_SUPPORT_SUPERG 3249 bo->bo_ath += sizeof(*csa); 3250#endif 3251#ifdef IEEE80211_SUPPORT_TDMA 3252 bo->bo_tdma += sizeof(*csa); 3253#endif 3254#ifdef IEEE80211_SUPPORT_MESH 3255 bo->bo_meshconf += sizeof(*csa); 3256#endif 3257 bo->bo_appie += sizeof(*csa); 3258 bo->bo_csa_trailer_len += sizeof(*csa); 3259 bo->bo_quiet += sizeof(*csa); 3260 bo->bo_tim_trailer_len += sizeof(*csa); 3261 m->m_len += sizeof(*csa); 3262 m->m_pkthdr.len += sizeof(*csa); 3263 3264 ieee80211_add_csa(bo->bo_csa, vap); 3265 } else 3266 csa->csa_count--; 3267 vap->iv_csa_count++; 3268 /* NB: don't clear IEEE80211_BEACON_CSA */ 3269 } 3270 if (IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) && 3271 (vap->iv_flags_ext & IEEE80211_FEXT_DFS) ){ 3272 if (vap->iv_quiet) 3273 ieee80211_add_quiet(bo->bo_quiet, vap); 3274 } 3275 if (isset(bo->bo_flags, IEEE80211_BEACON_ERP)) { 3276 /* 3277 * ERP element needs updating. 3278 */ 3279 (void) ieee80211_add_erp(bo->bo_erp, ic); 3280 clrbit(bo->bo_flags, IEEE80211_BEACON_ERP); 3281 } 3282#ifdef IEEE80211_SUPPORT_SUPERG 3283 if (isset(bo->bo_flags, IEEE80211_BEACON_ATH)) { 3284 ieee80211_add_athcaps(bo->bo_ath, ni); 3285 clrbit(bo->bo_flags, IEEE80211_BEACON_ATH); 3286 } 3287#endif 3288 } 3289 if (isset(bo->bo_flags, IEEE80211_BEACON_APPIE)) { 3290 const struct ieee80211_appie *aie = vap->iv_appie_beacon; 3291 int aielen; 3292 uint8_t *frm; 3293 3294 aielen = 0; 3295 if (aie != NULL) 3296 aielen += aie->ie_len; 3297 if (aielen != bo->bo_appie_len) { 3298 /* copy up/down trailer */ 3299 int adjust = aielen - bo->bo_appie_len; 3300 ovbcopy(bo->bo_tim_trailer, bo->bo_tim_trailer+adjust, 3301 bo->bo_tim_trailer_len); 3302 bo->bo_tim_trailer += adjust; 3303 bo->bo_appie += adjust; 3304 bo->bo_appie_len = aielen; 3305 3306 len_changed = 1; 3307 } 3308 frm = bo->bo_appie; 3309 if (aie != NULL) 3310 frm = add_appie(frm, aie); 3311 clrbit(bo->bo_flags, IEEE80211_BEACON_APPIE); 3312 } 3313 IEEE80211_UNLOCK(ic); 3314 3315 return len_changed; 3316} 3317