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("$FreeBSD$"); 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 90 static int ieee80211_fragment(struct ieee80211vap *, struct mbuf *, 91 u_int hdrsize, u_int ciphdrsize, u_int mtu); 92 static 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 */ 101 static __inline int 102 doprint(struct ieee80211vap *vap, int subtype) 103 { 104 switch (subtype) { 105 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 106 return (vap->iv_opmode == IEEE80211_M_IBSS); 107 } 108 return 1; 109 } 110 #endif 111 112 /* 113 * Send the given mbuf through the given vap. 114 * 115 * This consumes the mbuf regardless of whether the transmit 116 * was successful or not. 117 * 118 * This does none of the initial checks that ieee80211_start() 119 * does (eg CAC timeout, interface wakeup) - the caller must 120 * do this first. 121 */ 122 static int 123 ieee80211_start_pkt(struct ieee80211vap *vap, struct mbuf *m) 124 { 125 #define IS_DWDS(vap) \ 126 (vap->iv_opmode == IEEE80211_M_WDS && \ 127 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) == 0) 128 struct ieee80211com *ic = vap->iv_ic; 129 struct ifnet *ifp = vap->iv_ifp; 130 struct ieee80211_node *ni; 131 struct ether_header *eh; 132 int error; 133 134 /* 135 * Cancel any background scan. 136 */ 137 if (ic->ic_flags & IEEE80211_F_SCAN) 138 ieee80211_cancel_anyscan(vap); 139 /* 140 * Find the node for the destination so we can do 141 * things like power save and fast frames aggregation. 142 * 143 * NB: past this point various code assumes the first 144 * mbuf has the 802.3 header present (and contiguous). 145 */ 146 ni = NULL; 147 if (m->m_len < sizeof(struct ether_header) && 148 (m = m_pullup(m, sizeof(struct ether_header))) == NULL) { 149 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 150 "discard frame, %s\n", "m_pullup failed"); 151 vap->iv_stats.is_tx_nobuf++; /* XXX */ 152 ifp->if_oerrors++; 153 return (ENOBUFS); 154 } 155 eh = mtod(m, struct ether_header *); 156 if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 157 if (IS_DWDS(vap)) { 158 /* 159 * Only unicast frames from the above go out 160 * DWDS vaps; multicast frames are handled by 161 * dispatching the frame as it comes through 162 * the AP vap (see below). 163 */ 164 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_WDS, 165 eh->ether_dhost, "mcast", "%s", "on DWDS"); 166 vap->iv_stats.is_dwds_mcast++; 167 m_freem(m); 168 /* XXX better status? */ 169 return (ENOBUFS); 170 } 171 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 172 /* 173 * Spam DWDS vap's w/ multicast traffic. 174 */ 175 /* XXX only if dwds in use? */ 176 ieee80211_dwds_mcast(vap, m); 177 } 178 } 179 #ifdef IEEE80211_SUPPORT_MESH 180 if (vap->iv_opmode != IEEE80211_M_MBSS) { 181 #endif 182 ni = ieee80211_find_txnode(vap, eh->ether_dhost); 183 if (ni == NULL) { 184 /* NB: ieee80211_find_txnode does stat+msg */ 185 ifp->if_oerrors++; 186 m_freem(m); 187 /* XXX better status? */ 188 return (ENOBUFS); 189 } 190 if (ni->ni_associd == 0 && 191 (ni->ni_flags & IEEE80211_NODE_ASSOCID)) { 192 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_OUTPUT, 193 eh->ether_dhost, NULL, 194 "sta not associated (type 0x%04x)", 195 htons(eh->ether_type)); 196 vap->iv_stats.is_tx_notassoc++; 197 ifp->if_oerrors++; 198 m_freem(m); 199 ieee80211_free_node(ni); 200 /* XXX better status? */ 201 return (ENOBUFS); 202 } 203 #ifdef IEEE80211_SUPPORT_MESH 204 } else { 205 if (!IEEE80211_ADDR_EQ(eh->ether_shost, vap->iv_myaddr)) { 206 /* 207 * Proxy station only if configured. 208 */ 209 if (!ieee80211_mesh_isproxyena(vap)) { 210 IEEE80211_DISCARD_MAC(vap, 211 IEEE80211_MSG_OUTPUT | 212 IEEE80211_MSG_MESH, 213 eh->ether_dhost, NULL, 214 "%s", "proxy not enabled"); 215 vap->iv_stats.is_mesh_notproxy++; 216 ifp->if_oerrors++; 217 m_freem(m); 218 /* XXX better status? */ 219 return (ENOBUFS); 220 } 221 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 222 "forward frame from DS SA(%6D), DA(%6D)\n", 223 eh->ether_shost, ":", 224 eh->ether_dhost, ":"); 225 ieee80211_mesh_proxy_check(vap, eh->ether_shost); 226 } 227 ni = ieee80211_mesh_discover(vap, eh->ether_dhost, m); 228 if (ni == NULL) { 229 /* 230 * NB: ieee80211_mesh_discover holds/disposes 231 * frame (e.g. queueing on path discovery). 232 */ 233 ifp->if_oerrors++; 234 /* XXX better status? */ 235 return (ENOBUFS); 236 } 237 } 238 #endif 239 if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) && 240 (m->m_flags & M_PWR_SAV) == 0) { 241 /* 242 * Station in power save mode; pass the frame 243 * to the 802.11 layer and continue. We'll get 244 * the frame back when the time is right. 245 * XXX lose WDS vap linkage? 246 */ 247 (void) ieee80211_pwrsave(ni, m); 248 ieee80211_free_node(ni); 249 /* XXX better status? */ 250 return (ENOBUFS); 251 } 252 /* calculate priority so drivers can find the tx queue */ 253 if (ieee80211_classify(ni, m)) { 254 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_OUTPUT, 255 eh->ether_dhost, NULL, 256 "%s", "classification failure"); 257 vap->iv_stats.is_tx_classify++; 258 ifp->if_oerrors++; 259 m_freem(m); 260 ieee80211_free_node(ni); 261 /* XXX better status? */ 262 return (ENOBUFS); 263 } 264 /* 265 * Stash the node pointer. Note that we do this after 266 * any call to ieee80211_dwds_mcast because that code 267 * uses any existing value for rcvif to identify the 268 * interface it (might have been) received on. 269 */ 270 m->m_pkthdr.rcvif = (void *)ni; 271 272 BPF_MTAP(ifp, m); /* 802.3 tx */ 273 274 275 /* 276 * Check if A-MPDU tx aggregation is setup or if we 277 * should try to enable it. The sta must be associated 278 * with HT and A-MPDU enabled for use. When the policy 279 * routine decides we should enable A-MPDU we issue an 280 * ADDBA request and wait for a reply. The frame being 281 * encapsulated will go out w/o using A-MPDU, or possibly 282 * it might be collected by the driver and held/retransmit. 283 * The default ic_ampdu_enable routine handles staggering 284 * ADDBA requests in case the receiver NAK's us or we are 285 * otherwise unable to establish a BA stream. 286 */ 287 if ((ni->ni_flags & IEEE80211_NODE_AMPDU_TX) && 288 (vap->iv_flags_ht & IEEE80211_FHT_AMPDU_TX) && 289 (m->m_flags & M_EAPOL) == 0) { 290 int tid = WME_AC_TO_TID(M_WME_GETAC(m)); 291 struct ieee80211_tx_ampdu *tap = &ni->ni_tx_ampdu[tid]; 292 293 ieee80211_txampdu_count_packet(tap); 294 if (IEEE80211_AMPDU_RUNNING(tap)) { 295 /* 296 * Operational, mark frame for aggregation. 297 * 298 * XXX do tx aggregation here 299 */ 300 m->m_flags |= M_AMPDU_MPDU; 301 } else if (!IEEE80211_AMPDU_REQUESTED(tap) && 302 ic->ic_ampdu_enable(ni, tap)) { 303 /* 304 * Not negotiated yet, request service. 305 */ 306 ieee80211_ampdu_request(ni, tap); 307 /* XXX hold frame for reply? */ 308 } 309 } 310 311 #ifdef IEEE80211_SUPPORT_SUPERG 312 else if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF)) { 313 m = ieee80211_ff_check(ni, m); 314 if (m == NULL) { 315 /* NB: any ni ref held on stageq */ 316 /* XXX better status? */ 317 return (ENOBUFS); 318 } 319 } 320 #endif /* IEEE80211_SUPPORT_SUPERG */ 321 322 /* 323 * Grab the TX lock - serialise the TX process from this 324 * point (where TX state is being checked/modified) 325 * through to driver queue. 326 */ 327 IEEE80211_TX_LOCK(ic); 328 329 if (__predict_true((vap->iv_caps & IEEE80211_C_8023ENCAP) == 0)) { 330 /* 331 * Encapsulate the packet in prep for transmission. 332 */ 333 m = ieee80211_encap(vap, ni, m); 334 if (m == NULL) { 335 /* NB: stat+msg handled in ieee80211_encap */ 336 IEEE80211_TX_UNLOCK(ic); 337 ieee80211_free_node(ni); 338 /* XXX better status? */ 339 return (ENOBUFS); 340 } 341 } 342 error = ieee80211_parent_transmit(ic, m); 343 344 /* 345 * Unlock at this point - no need to hold it across 346 * ieee80211_free_node() (ie, the comlock) 347 */ 348 IEEE80211_TX_UNLOCK(ic); 349 if (error != 0) { 350 /* NB: IFQ_HANDOFF reclaims mbuf */ 351 ieee80211_free_node(ni); 352 } else { 353 ifp->if_opackets++; 354 } 355 ic->ic_lastdata = ticks; 356 357 return (0); 358 #undef IS_DWDS 359 } 360 361 /* 362 * Start method for vap's. All packets from the stack come 363 * through here. We handle common processing of the packets 364 * before dispatching them to the underlying device. 365 */ 366 void 367 ieee80211_start(struct ifnet *ifp) 368 { 369 struct ieee80211vap *vap = ifp->if_softc; 370 struct ieee80211com *ic = vap->iv_ic; 371 struct ifnet *parent = ic->ic_ifp; 372 struct mbuf *m; 373 374 /* NB: parent must be up and running */ 375 if (!IFNET_IS_UP_RUNNING(parent)) { 376 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 377 "%s: ignore queue, parent %s not up+running\n", 378 __func__, parent->if_xname); 379 /* XXX stat */ 380 return; 381 } 382 if (vap->iv_state == IEEE80211_S_SLEEP) { 383 /* 384 * In power save, wakeup device for transmit. 385 */ 386 ieee80211_new_state(vap, IEEE80211_S_RUN, 0); 387 return; 388 } 389 /* 390 * No data frames go out unless we're running. 391 * Note in particular this covers CAC and CSA 392 * states (though maybe we should check muting 393 * for CSA). 394 */ 395 if (vap->iv_state != IEEE80211_S_RUN) { 396 IEEE80211_LOCK(ic); 397 /* re-check under the com lock to avoid races */ 398 if (vap->iv_state != IEEE80211_S_RUN) { 399 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 400 "%s: ignore queue, in %s state\n", 401 __func__, ieee80211_state_name[vap->iv_state]); 402 vap->iv_stats.is_tx_badstate++; 403 IEEE80211_UNLOCK(ic); 404 IFQ_LOCK(&ifp->if_snd); 405 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 406 IFQ_UNLOCK(&ifp->if_snd); 407 return; 408 } 409 IEEE80211_UNLOCK(ic); 410 } 411 412 for (;;) { 413 IFQ_DEQUEUE(&ifp->if_snd, m); 414 if (m == NULL) 415 break; 416 /* 417 * Sanitize mbuf flags for net80211 use. We cannot 418 * clear M_PWR_SAV or M_MORE_DATA because these may 419 * be set for frames that are re-submitted from the 420 * power save queue. 421 * 422 * NB: This must be done before ieee80211_classify as 423 * it marks EAPOL in frames with M_EAPOL. 424 */ 425 m->m_flags &= ~(M_80211_TX - M_PWR_SAV - M_MORE_DATA); 426 /* 427 * Bump to the packet transmission path. 428 */ 429 (void) ieee80211_start_pkt(vap, m); 430 /* mbuf is consumed here */ 431 } 432 } 433 434 /* 435 * 802.11 raw output routine. 436 */ 437 int 438 ieee80211_raw_output(struct ieee80211vap *vap, struct ieee80211_node *ni, 439 struct mbuf *m, const struct ieee80211_bpf_params *params) 440 { 441 struct ieee80211com *ic = vap->iv_ic; 442 443 return (ic->ic_raw_xmit(ni, m, params)); 444 } 445 446 /* 447 * 802.11 output routine. This is (currently) used only to 448 * connect bpf write calls to the 802.11 layer for injecting 449 * raw 802.11 frames. 450 */ 451 int 452 ieee80211_output(struct ifnet *ifp, struct mbuf *m, 453 const struct sockaddr *dst, struct route *ro) 454 { 455 #define senderr(e) do { error = (e); goto bad;} while (0) 456 struct ieee80211_node *ni = NULL; 457 struct ieee80211vap *vap; 458 struct ieee80211_frame *wh; 459 struct ieee80211com *ic = NULL; 460 int error; 461 int ret; 462 463 IFQ_LOCK(&ifp->if_snd); 464 if (ifp->if_drv_flags & IFF_DRV_OACTIVE) { 465 IFQ_UNLOCK(&ifp->if_snd); 466 /* 467 * Short-circuit requests if the vap is marked OACTIVE 468 * as this can happen because a packet came down through 469 * ieee80211_start before the vap entered RUN state in 470 * which case it's ok to just drop the frame. This 471 * should not be necessary but callers of if_output don't 472 * check OACTIVE. 473 */ 474 senderr(ENETDOWN); 475 } 476 IFQ_UNLOCK(&ifp->if_snd); 477 vap = ifp->if_softc; 478 ic = vap->iv_ic; 479 /* 480 * Hand to the 802.3 code if not tagged as 481 * a raw 802.11 frame. 482 */ 483 if (dst->sa_family != AF_IEEE80211) 484 return vap->iv_output(ifp, m, dst, ro); 485 #ifdef MAC 486 error = mac_ifnet_check_transmit(ifp, m); 487 if (error) 488 senderr(error); 489 #endif 490 if (ifp->if_flags & IFF_MONITOR) 491 senderr(ENETDOWN); 492 if (!IFNET_IS_UP_RUNNING(ifp)) 493 senderr(ENETDOWN); 494 if (vap->iv_state == IEEE80211_S_CAC) { 495 IEEE80211_DPRINTF(vap, 496 IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH, 497 "block %s frame in CAC state\n", "raw data"); 498 vap->iv_stats.is_tx_badstate++; 499 senderr(EIO); /* XXX */ 500 } else if (vap->iv_state == IEEE80211_S_SCAN) 501 senderr(EIO); 502 /* XXX bypass bridge, pfil, carp, etc. */ 503 504 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_ack)) 505 senderr(EIO); /* XXX */ 506 wh = mtod(m, struct ieee80211_frame *); 507 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 508 IEEE80211_FC0_VERSION_0) 509 senderr(EIO); /* XXX */ 510 511 /* locate destination node */ 512 switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) { 513 case IEEE80211_FC1_DIR_NODS: 514 case IEEE80211_FC1_DIR_FROMDS: 515 ni = ieee80211_find_txnode(vap, wh->i_addr1); 516 break; 517 case IEEE80211_FC1_DIR_TODS: 518 case IEEE80211_FC1_DIR_DSTODS: 519 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) 520 senderr(EIO); /* XXX */ 521 ni = ieee80211_find_txnode(vap, wh->i_addr3); 522 break; 523 default: 524 senderr(EIO); /* XXX */ 525 } 526 if (ni == NULL) { 527 /* 528 * Permit packets w/ bpf params through regardless 529 * (see below about sa_len). 530 */ 531 if (dst->sa_len == 0) 532 senderr(EHOSTUNREACH); 533 ni = ieee80211_ref_node(vap->iv_bss); 534 } 535 536 /* 537 * Sanitize mbuf for net80211 flags leaked from above. 538 * 539 * NB: This must be done before ieee80211_classify as 540 * it marks EAPOL in frames with M_EAPOL. 541 */ 542 m->m_flags &= ~M_80211_TX; 543 544 /* calculate priority so drivers can find the tx queue */ 545 /* XXX assumes an 802.3 frame */ 546 if (ieee80211_classify(ni, m)) 547 senderr(EIO); /* XXX */ 548 549 ifp->if_opackets++; 550 IEEE80211_NODE_STAT(ni, tx_data); 551 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 552 IEEE80211_NODE_STAT(ni, tx_mcast); 553 m->m_flags |= M_MCAST; 554 } else 555 IEEE80211_NODE_STAT(ni, tx_ucast); 556 /* NB: ieee80211_encap does not include 802.11 header */ 557 IEEE80211_NODE_STAT_ADD(ni, tx_bytes, m->m_pkthdr.len); 558 559 IEEE80211_TX_LOCK(ic); 560 561 /* 562 * NB: DLT_IEEE802_11_RADIO identifies the parameters are 563 * present by setting the sa_len field of the sockaddr (yes, 564 * this is a hack). 565 * NB: we assume sa_data is suitably aligned to cast. 566 */ 567 ret = ieee80211_raw_output(vap, ni, m, 568 (const struct ieee80211_bpf_params *)(dst->sa_len ? 569 dst->sa_data : NULL)); 570 IEEE80211_TX_UNLOCK(ic); 571 return (ret); 572 bad: 573 if (m != NULL) 574 m_freem(m); 575 if (ni != NULL) 576 ieee80211_free_node(ni); 577 ifp->if_oerrors++; 578 return error; 579 #undef senderr 580 } 581 582 /* 583 * Set the direction field and address fields of an outgoing 584 * frame. Note this should be called early on in constructing 585 * a frame as it sets i_fc[1]; other bits can then be or'd in. 586 */ 587 void 588 ieee80211_send_setup( 589 struct ieee80211_node *ni, 590 struct mbuf *m, 591 int type, int tid, 592 const uint8_t sa[IEEE80211_ADDR_LEN], 593 const uint8_t da[IEEE80211_ADDR_LEN], 594 const uint8_t bssid[IEEE80211_ADDR_LEN]) 595 { 596 #define WH4(wh) ((struct ieee80211_frame_addr4 *)wh) 597 struct ieee80211vap *vap = ni->ni_vap; 598 struct ieee80211_tx_ampdu *tap; 599 struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *); 600 ieee80211_seq seqno; 601 602 IEEE80211_TX_LOCK_ASSERT(ni->ni_ic); 603 604 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | type; 605 if ((type & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_DATA) { 606 switch (vap->iv_opmode) { 607 case IEEE80211_M_STA: 608 wh->i_fc[1] = IEEE80211_FC1_DIR_TODS; 609 IEEE80211_ADDR_COPY(wh->i_addr1, bssid); 610 IEEE80211_ADDR_COPY(wh->i_addr2, sa); 611 IEEE80211_ADDR_COPY(wh->i_addr3, da); 612 break; 613 case IEEE80211_M_IBSS: 614 case IEEE80211_M_AHDEMO: 615 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 616 IEEE80211_ADDR_COPY(wh->i_addr1, da); 617 IEEE80211_ADDR_COPY(wh->i_addr2, sa); 618 IEEE80211_ADDR_COPY(wh->i_addr3, bssid); 619 break; 620 case IEEE80211_M_HOSTAP: 621 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS; 622 IEEE80211_ADDR_COPY(wh->i_addr1, da); 623 IEEE80211_ADDR_COPY(wh->i_addr2, bssid); 624 IEEE80211_ADDR_COPY(wh->i_addr3, sa); 625 break; 626 case IEEE80211_M_WDS: 627 wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS; 628 IEEE80211_ADDR_COPY(wh->i_addr1, da); 629 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); 630 IEEE80211_ADDR_COPY(wh->i_addr3, da); 631 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, sa); 632 break; 633 case IEEE80211_M_MBSS: 634 #ifdef IEEE80211_SUPPORT_MESH 635 if (IEEE80211_IS_MULTICAST(da)) { 636 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS; 637 /* XXX next hop */ 638 IEEE80211_ADDR_COPY(wh->i_addr1, da); 639 IEEE80211_ADDR_COPY(wh->i_addr2, 640 vap->iv_myaddr); 641 } else { 642 wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS; 643 IEEE80211_ADDR_COPY(wh->i_addr1, da); 644 IEEE80211_ADDR_COPY(wh->i_addr2, 645 vap->iv_myaddr); 646 IEEE80211_ADDR_COPY(wh->i_addr3, da); 647 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, sa); 648 } 649 #endif 650 break; 651 case IEEE80211_M_MONITOR: /* NB: to quiet compiler */ 652 break; 653 } 654 } else { 655 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 656 IEEE80211_ADDR_COPY(wh->i_addr1, da); 657 IEEE80211_ADDR_COPY(wh->i_addr2, sa); 658 #ifdef IEEE80211_SUPPORT_MESH 659 if (vap->iv_opmode == IEEE80211_M_MBSS) 660 IEEE80211_ADDR_COPY(wh->i_addr3, sa); 661 else 662 #endif 663 IEEE80211_ADDR_COPY(wh->i_addr3, bssid); 664 } 665 *(uint16_t *)&wh->i_dur[0] = 0; 666 667 tap = &ni->ni_tx_ampdu[tid]; 668 if (tid != IEEE80211_NONQOS_TID && IEEE80211_AMPDU_RUNNING(tap)) 669 m->m_flags |= M_AMPDU_MPDU; 670 else { 671 seqno = ni->ni_txseqs[tid]++; 672 *(uint16_t *)&wh->i_seq[0] = 673 htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); 674 M_SEQNO_SET(m, seqno); 675 } 676 677 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) 678 m->m_flags |= M_MCAST; 679 #undef WH4 680 } 681 682 /* 683 * Send a management frame to the specified node. The node pointer 684 * must have a reference as the pointer will be passed to the driver 685 * and potentially held for a long time. If the frame is successfully 686 * dispatched to the driver, then it is responsible for freeing the 687 * reference (and potentially free'ing up any associated storage); 688 * otherwise deal with reclaiming any reference (on error). 689 */ 690 int 691 ieee80211_mgmt_output(struct ieee80211_node *ni, struct mbuf *m, int type, 692 struct ieee80211_bpf_params *params) 693 { 694 struct ieee80211vap *vap = ni->ni_vap; 695 struct ieee80211com *ic = ni->ni_ic; 696 struct ieee80211_frame *wh; 697 int ret; 698 699 KASSERT(ni != NULL, ("null node")); 700 701 if (vap->iv_state == IEEE80211_S_CAC) { 702 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH, 703 ni, "block %s frame in CAC state", 704 ieee80211_mgt_subtype_name[ 705 (type & IEEE80211_FC0_SUBTYPE_MASK) >> 706 IEEE80211_FC0_SUBTYPE_SHIFT]); 707 vap->iv_stats.is_tx_badstate++; 708 ieee80211_free_node(ni); 709 m_freem(m); 710 return EIO; /* XXX */ 711 } 712 713 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); 714 if (m == NULL) { 715 ieee80211_free_node(ni); 716 return ENOMEM; 717 } 718 719 IEEE80211_TX_LOCK(ic); 720 721 wh = mtod(m, struct ieee80211_frame *); 722 ieee80211_send_setup(ni, m, 723 IEEE80211_FC0_TYPE_MGT | type, IEEE80211_NONQOS_TID, 724 vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid); 725 if (params->ibp_flags & IEEE80211_BPF_CRYPTO) { 726 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr1, 727 "encrypting frame (%s)", __func__); 728 wh->i_fc[1] |= IEEE80211_FC1_WEP; 729 } 730 m->m_flags |= M_ENCAP; /* mark encapsulated */ 731 732 KASSERT(type != IEEE80211_FC0_SUBTYPE_PROBE_RESP, ("probe response?")); 733 M_WME_SETAC(m, params->ibp_pri); 734 735 #ifdef IEEE80211_DEBUG 736 /* avoid printing too many frames */ 737 if ((ieee80211_msg_debug(vap) && doprint(vap, type)) || 738 ieee80211_msg_dumppkts(vap)) { 739 printf("[%s] send %s on channel %u\n", 740 ether_sprintf(wh->i_addr1), 741 ieee80211_mgt_subtype_name[ 742 (type & IEEE80211_FC0_SUBTYPE_MASK) >> 743 IEEE80211_FC0_SUBTYPE_SHIFT], 744 ieee80211_chan2ieee(ic, ic->ic_curchan)); 745 } 746 #endif 747 IEEE80211_NODE_STAT(ni, tx_mgmt); 748 749 ret = ieee80211_raw_output(vap, ni, m, params); 750 IEEE80211_TX_UNLOCK(ic); 751 return (ret); 752 } 753 754 /* 755 * Send a null data frame to the specified node. If the station 756 * is setup for QoS then a QoS Null Data frame is constructed. 757 * If this is a WDS station then a 4-address frame is constructed. 758 * 759 * NB: the caller is assumed to have setup a node reference 760 * for use; this is necessary to deal with a race condition 761 * when probing for inactive stations. Like ieee80211_mgmt_output 762 * we must cleanup any node reference on error; however we 763 * can safely just unref it as we know it will never be the 764 * last reference to the node. 765 */ 766 int 767 ieee80211_send_nulldata(struct ieee80211_node *ni) 768 { 769 struct ieee80211vap *vap = ni->ni_vap; 770 struct ieee80211com *ic = ni->ni_ic; 771 struct mbuf *m; 772 struct ieee80211_frame *wh; 773 int hdrlen; 774 uint8_t *frm; 775 int ret; 776 777 if (vap->iv_state == IEEE80211_S_CAC) { 778 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH, 779 ni, "block %s frame in CAC state", "null data"); 780 ieee80211_unref_node(&ni); 781 vap->iv_stats.is_tx_badstate++; 782 return EIO; /* XXX */ 783 } 784 785 if (ni->ni_flags & (IEEE80211_NODE_QOS|IEEE80211_NODE_HT)) 786 hdrlen = sizeof(struct ieee80211_qosframe); 787 else 788 hdrlen = sizeof(struct ieee80211_frame); 789 /* NB: only WDS vap's get 4-address frames */ 790 if (vap->iv_opmode == IEEE80211_M_WDS) 791 hdrlen += IEEE80211_ADDR_LEN; 792 if (ic->ic_flags & IEEE80211_F_DATAPAD) 793 hdrlen = roundup(hdrlen, sizeof(uint32_t)); 794 795 m = ieee80211_getmgtframe(&frm, ic->ic_headroom + hdrlen, 0); 796 if (m == NULL) { 797 /* XXX debug msg */ 798 ieee80211_unref_node(&ni); 799 vap->iv_stats.is_tx_nobuf++; 800 return ENOMEM; 801 } 802 KASSERT(M_LEADINGSPACE(m) >= hdrlen, 803 ("leading space %zd", M_LEADINGSPACE(m))); 804 M_PREPEND(m, hdrlen, M_NOWAIT); 805 if (m == NULL) { 806 /* NB: cannot happen */ 807 ieee80211_free_node(ni); 808 return ENOMEM; 809 } 810 811 IEEE80211_TX_LOCK(ic); 812 813 wh = mtod(m, struct ieee80211_frame *); /* NB: a little lie */ 814 if (ni->ni_flags & IEEE80211_NODE_QOS) { 815 const int tid = WME_AC_TO_TID(WME_AC_BE); 816 uint8_t *qos; 817 818 ieee80211_send_setup(ni, m, 819 IEEE80211_FC0_TYPE_DATA | IEEE80211_FC0_SUBTYPE_QOS_NULL, 820 tid, vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid); 821 822 if (vap->iv_opmode == IEEE80211_M_WDS) 823 qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos; 824 else 825 qos = ((struct ieee80211_qosframe *) wh)->i_qos; 826 qos[0] = tid & IEEE80211_QOS_TID; 827 if (ic->ic_wme.wme_wmeChanParams.cap_wmeParams[WME_AC_BE].wmep_noackPolicy) 828 qos[0] |= IEEE80211_QOS_ACKPOLICY_NOACK; 829 qos[1] = 0; 830 } else { 831 ieee80211_send_setup(ni, m, 832 IEEE80211_FC0_TYPE_DATA | IEEE80211_FC0_SUBTYPE_NODATA, 833 IEEE80211_NONQOS_TID, 834 vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid); 835 } 836 if (vap->iv_opmode != IEEE80211_M_WDS) { 837 /* NB: power management bit is never sent by an AP */ 838 if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) && 839 vap->iv_opmode != IEEE80211_M_HOSTAP) 840 wh->i_fc[1] |= IEEE80211_FC1_PWR_MGT; 841 } 842 m->m_len = m->m_pkthdr.len = hdrlen; 843 m->m_flags |= M_ENCAP; /* mark encapsulated */ 844 845 M_WME_SETAC(m, WME_AC_BE); 846 847 IEEE80211_NODE_STAT(ni, tx_data); 848 849 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS, ni, 850 "send %snull data frame on channel %u, pwr mgt %s", 851 ni->ni_flags & IEEE80211_NODE_QOS ? "QoS " : "", 852 ieee80211_chan2ieee(ic, ic->ic_curchan), 853 wh->i_fc[1] & IEEE80211_FC1_PWR_MGT ? "ena" : "dis"); 854 855 ret = ieee80211_raw_output(vap, ni, m, NULL); 856 IEEE80211_TX_UNLOCK(ic); 857 return (ret); 858 } 859 860 /* 861 * Assign priority to a frame based on any vlan tag assigned 862 * to the station and/or any Diffserv setting in an IP header. 863 * Finally, if an ACM policy is setup (in station mode) it's 864 * applied. 865 */ 866 int 867 ieee80211_classify(struct ieee80211_node *ni, struct mbuf *m) 868 { 869 const struct ether_header *eh = mtod(m, struct ether_header *); 870 int v_wme_ac, d_wme_ac, ac; 871 872 /* 873 * Always promote PAE/EAPOL frames to high priority. 874 */ 875 if (eh->ether_type == htons(ETHERTYPE_PAE)) { 876 /* NB: mark so others don't need to check header */ 877 m->m_flags |= M_EAPOL; 878 ac = WME_AC_VO; 879 goto done; 880 } 881 /* 882 * Non-qos traffic goes to BE. 883 */ 884 if ((ni->ni_flags & IEEE80211_NODE_QOS) == 0) { 885 ac = WME_AC_BE; 886 goto done; 887 } 888 889 /* 890 * If node has a vlan tag then all traffic 891 * to it must have a matching tag. 892 */ 893 v_wme_ac = 0; 894 if (ni->ni_vlan != 0) { 895 if ((m->m_flags & M_VLANTAG) == 0) { 896 IEEE80211_NODE_STAT(ni, tx_novlantag); 897 return 1; 898 } 899 if (EVL_VLANOFTAG(m->m_pkthdr.ether_vtag) != 900 EVL_VLANOFTAG(ni->ni_vlan)) { 901 IEEE80211_NODE_STAT(ni, tx_vlanmismatch); 902 return 1; 903 } 904 /* map vlan priority to AC */ 905 v_wme_ac = TID_TO_WME_AC(EVL_PRIOFTAG(ni->ni_vlan)); 906 } 907 908 /* XXX m_copydata may be too slow for fast path */ 909 #ifdef INET 910 if (eh->ether_type == htons(ETHERTYPE_IP)) { 911 uint8_t tos; 912 /* 913 * IP frame, map the DSCP bits from the TOS field. 914 */ 915 /* NB: ip header may not be in first mbuf */ 916 m_copydata(m, sizeof(struct ether_header) + 917 offsetof(struct ip, ip_tos), sizeof(tos), &tos); 918 tos >>= 5; /* NB: ECN + low 3 bits of DSCP */ 919 d_wme_ac = TID_TO_WME_AC(tos); 920 } else { 921 #endif /* INET */ 922 #ifdef INET6 923 if (eh->ether_type == htons(ETHERTYPE_IPV6)) { 924 uint32_t flow; 925 uint8_t tos; 926 /* 927 * IPv6 frame, map the DSCP bits from the traffic class field. 928 */ 929 m_copydata(m, sizeof(struct ether_header) + 930 offsetof(struct ip6_hdr, ip6_flow), sizeof(flow), 931 (caddr_t) &flow); 932 tos = (uint8_t)(ntohl(flow) >> 20); 933 tos >>= 5; /* NB: ECN + low 3 bits of DSCP */ 934 d_wme_ac = TID_TO_WME_AC(tos); 935 } else { 936 #endif /* INET6 */ 937 d_wme_ac = WME_AC_BE; 938 #ifdef INET6 939 } 940 #endif 941 #ifdef INET 942 } 943 #endif 944 /* 945 * Use highest priority AC. 946 */ 947 if (v_wme_ac > d_wme_ac) 948 ac = v_wme_ac; 949 else 950 ac = d_wme_ac; 951 952 /* 953 * Apply ACM policy. 954 */ 955 if (ni->ni_vap->iv_opmode == IEEE80211_M_STA) { 956 static const int acmap[4] = { 957 WME_AC_BK, /* WME_AC_BE */ 958 WME_AC_BK, /* WME_AC_BK */ 959 WME_AC_BE, /* WME_AC_VI */ 960 WME_AC_VI, /* WME_AC_VO */ 961 }; 962 struct ieee80211com *ic = ni->ni_ic; 963 964 while (ac != WME_AC_BK && 965 ic->ic_wme.wme_wmeBssChanParams.cap_wmeParams[ac].wmep_acm) 966 ac = acmap[ac]; 967 } 968 done: 969 M_WME_SETAC(m, ac); 970 return 0; 971 } 972 973 /* 974 * Insure there is sufficient contiguous space to encapsulate the 975 * 802.11 data frame. If room isn't already there, arrange for it. 976 * Drivers and cipher modules assume we have done the necessary work 977 * and fail rudely if they don't find the space they need. 978 */ 979 struct mbuf * 980 ieee80211_mbuf_adjust(struct ieee80211vap *vap, int hdrsize, 981 struct ieee80211_key *key, struct mbuf *m) 982 { 983 #define TO_BE_RECLAIMED (sizeof(struct ether_header) - sizeof(struct llc)) 984 int needed_space = vap->iv_ic->ic_headroom + hdrsize; 985 986 if (key != NULL) { 987 /* XXX belongs in crypto code? */ 988 needed_space += key->wk_cipher->ic_header; 989 /* XXX frags */ 990 /* 991 * When crypto is being done in the host we must insure 992 * the data are writable for the cipher routines; clone 993 * a writable mbuf chain. 994 * XXX handle SWMIC specially 995 */ 996 if (key->wk_flags & (IEEE80211_KEY_SWENCRYPT|IEEE80211_KEY_SWENMIC)) { 997 m = m_unshare(m, M_NOWAIT); 998 if (m == NULL) { 999 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 1000 "%s: cannot get writable mbuf\n", __func__); 1001 vap->iv_stats.is_tx_nobuf++; /* XXX new stat */ 1002 return NULL; 1003 } 1004 } 1005 } 1006 /* 1007 * We know we are called just before stripping an Ethernet 1008 * header and prepending an LLC header. This means we know 1009 * there will be 1010 * sizeof(struct ether_header) - sizeof(struct llc) 1011 * bytes recovered to which we need additional space for the 1012 * 802.11 header and any crypto header. 1013 */ 1014 /* XXX check trailing space and copy instead? */ 1015 if (M_LEADINGSPACE(m) < needed_space - TO_BE_RECLAIMED) { 1016 struct mbuf *n = m_gethdr(M_NOWAIT, m->m_type); 1017 if (n == NULL) { 1018 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 1019 "%s: cannot expand storage\n", __func__); 1020 vap->iv_stats.is_tx_nobuf++; 1021 m_freem(m); 1022 return NULL; 1023 } 1024 KASSERT(needed_space <= MHLEN, 1025 ("not enough room, need %u got %d\n", needed_space, MHLEN)); 1026 /* 1027 * Setup new mbuf to have leading space to prepend the 1028 * 802.11 header and any crypto header bits that are 1029 * required (the latter are added when the driver calls 1030 * back to ieee80211_crypto_encap to do crypto encapsulation). 1031 */ 1032 /* NB: must be first 'cuz it clobbers m_data */ 1033 m_move_pkthdr(n, m); 1034 n->m_len = 0; /* NB: m_gethdr does not set */ 1035 n->m_data += needed_space; 1036 /* 1037 * Pull up Ethernet header to create the expected layout. 1038 * We could use m_pullup but that's overkill (i.e. we don't 1039 * need the actual data) and it cannot fail so do it inline 1040 * for speed. 1041 */ 1042 /* NB: struct ether_header is known to be contiguous */ 1043 n->m_len += sizeof(struct ether_header); 1044 m->m_len -= sizeof(struct ether_header); 1045 m->m_data += sizeof(struct ether_header); 1046 /* 1047 * Replace the head of the chain. 1048 */ 1049 n->m_next = m; 1050 m = n; 1051 } 1052 return m; 1053 #undef TO_BE_RECLAIMED 1054 } 1055 1056 /* 1057 * Return the transmit key to use in sending a unicast frame. 1058 * If a unicast key is set we use that. When no unicast key is set 1059 * we fall back to the default transmit key. 1060 */ 1061 static __inline struct ieee80211_key * 1062 ieee80211_crypto_getucastkey(struct ieee80211vap *vap, 1063 struct ieee80211_node *ni) 1064 { 1065 if (IEEE80211_KEY_UNDEFINED(&ni->ni_ucastkey)) { 1066 if (vap->iv_def_txkey == IEEE80211_KEYIX_NONE || 1067 IEEE80211_KEY_UNDEFINED(&vap->iv_nw_keys[vap->iv_def_txkey])) 1068 return NULL; 1069 return &vap->iv_nw_keys[vap->iv_def_txkey]; 1070 } else { 1071 return &ni->ni_ucastkey; 1072 } 1073 } 1074 1075 /* 1076 * Return the transmit key to use in sending a multicast frame. 1077 * Multicast traffic always uses the group key which is installed as 1078 * the default tx key. 1079 */ 1080 static __inline struct ieee80211_key * 1081 ieee80211_crypto_getmcastkey(struct ieee80211vap *vap, 1082 struct ieee80211_node *ni) 1083 { 1084 if (vap->iv_def_txkey == IEEE80211_KEYIX_NONE || 1085 IEEE80211_KEY_UNDEFINED(&vap->iv_nw_keys[vap->iv_def_txkey])) 1086 return NULL; 1087 return &vap->iv_nw_keys[vap->iv_def_txkey]; 1088 } 1089 1090 /* 1091 * Encapsulate an outbound data frame. The mbuf chain is updated. 1092 * If an error is encountered NULL is returned. The caller is required 1093 * to provide a node reference and pullup the ethernet header in the 1094 * first mbuf. 1095 * 1096 * NB: Packet is assumed to be processed by ieee80211_classify which 1097 * marked EAPOL frames w/ M_EAPOL. 1098 */ 1099 struct mbuf * 1100 ieee80211_encap(struct ieee80211vap *vap, struct ieee80211_node *ni, 1101 struct mbuf *m) 1102 { 1103 #define WH4(wh) ((struct ieee80211_frame_addr4 *)(wh)) 1104 #define MC01(mc) ((struct ieee80211_meshcntl_ae01 *)mc) 1105 struct ieee80211com *ic = ni->ni_ic; 1106 #ifdef IEEE80211_SUPPORT_MESH 1107 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1108 struct ieee80211_meshcntl_ae10 *mc; 1109 struct ieee80211_mesh_route *rt = NULL; 1110 int dir = -1; 1111 #endif 1112 struct ether_header eh; 1113 struct ieee80211_frame *wh; 1114 struct ieee80211_key *key; 1115 struct llc *llc; 1116 int hdrsize, hdrspace, datalen, addqos, txfrag, is4addr; 1117 ieee80211_seq seqno; 1118 int meshhdrsize, meshae; 1119 uint8_t *qos; 1120 1121 IEEE80211_TX_LOCK_ASSERT(ic); 1122 1123 /* 1124 * Copy existing Ethernet header to a safe place. The 1125 * rest of the code assumes it's ok to strip it when 1126 * reorganizing state for the final encapsulation. 1127 */ 1128 KASSERT(m->m_len >= sizeof(eh), ("no ethernet header!")); 1129 ETHER_HEADER_COPY(&eh, mtod(m, caddr_t)); 1130 1131 /* 1132 * Insure space for additional headers. First identify 1133 * transmit key to use in calculating any buffer adjustments 1134 * required. This is also used below to do privacy 1135 * encapsulation work. Then calculate the 802.11 header 1136 * size and any padding required by the driver. 1137 * 1138 * Note key may be NULL if we fall back to the default 1139 * transmit key and that is not set. In that case the 1140 * buffer may not be expanded as needed by the cipher 1141 * routines, but they will/should discard it. 1142 */ 1143 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 1144 if (vap->iv_opmode == IEEE80211_M_STA || 1145 !IEEE80211_IS_MULTICAST(eh.ether_dhost) || 1146 (vap->iv_opmode == IEEE80211_M_WDS && 1147 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY))) 1148 key = ieee80211_crypto_getucastkey(vap, ni); 1149 else 1150 key = ieee80211_crypto_getmcastkey(vap, ni); 1151 if (key == NULL && (m->m_flags & M_EAPOL) == 0) { 1152 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, 1153 eh.ether_dhost, 1154 "no default transmit key (%s) deftxkey %u", 1155 __func__, vap->iv_def_txkey); 1156 vap->iv_stats.is_tx_nodefkey++; 1157 goto bad; 1158 } 1159 } else 1160 key = NULL; 1161 /* 1162 * XXX Some ap's don't handle QoS-encapsulated EAPOL 1163 * frames so suppress use. This may be an issue if other 1164 * ap's require all data frames to be QoS-encapsulated 1165 * once negotiated in which case we'll need to make this 1166 * configurable. 1167 * NB: mesh data frames are QoS. 1168 */ 1169 addqos = ((ni->ni_flags & (IEEE80211_NODE_QOS|IEEE80211_NODE_HT)) || 1170 (vap->iv_opmode == IEEE80211_M_MBSS)) && 1171 (m->m_flags & M_EAPOL) == 0; 1172 if (addqos) 1173 hdrsize = sizeof(struct ieee80211_qosframe); 1174 else 1175 hdrsize = sizeof(struct ieee80211_frame); 1176 #ifdef IEEE80211_SUPPORT_MESH 1177 if (vap->iv_opmode == IEEE80211_M_MBSS) { 1178 /* 1179 * Mesh data frames are encapsulated according to the 1180 * rules of Section 11B.8.5 (p.139 of D3.0 spec). 1181 * o Group Addressed data (aka multicast) originating 1182 * at the local sta are sent w/ 3-address format and 1183 * address extension mode 00 1184 * o Individually Addressed data (aka unicast) originating 1185 * at the local sta are sent w/ 4-address format and 1186 * address extension mode 00 1187 * o Group Addressed data forwarded from a non-mesh sta are 1188 * sent w/ 3-address format and address extension mode 01 1189 * o Individually Address data from another sta are sent 1190 * w/ 4-address format and address extension mode 10 1191 */ 1192 is4addr = 0; /* NB: don't use, disable */ 1193 if (!IEEE80211_IS_MULTICAST(eh.ether_dhost)) { 1194 rt = ieee80211_mesh_rt_find(vap, eh.ether_dhost); 1195 KASSERT(rt != NULL, ("route is NULL")); 1196 dir = IEEE80211_FC1_DIR_DSTODS; 1197 hdrsize += IEEE80211_ADDR_LEN; 1198 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { 1199 if (IEEE80211_ADDR_EQ(rt->rt_mesh_gate, 1200 vap->iv_myaddr)) { 1201 IEEE80211_NOTE_MAC(vap, 1202 IEEE80211_MSG_MESH, 1203 eh.ether_dhost, 1204 "%s", "trying to send to ourself"); 1205 goto bad; 1206 } 1207 meshae = IEEE80211_MESH_AE_10; 1208 meshhdrsize = 1209 sizeof(struct ieee80211_meshcntl_ae10); 1210 } else { 1211 meshae = IEEE80211_MESH_AE_00; 1212 meshhdrsize = 1213 sizeof(struct ieee80211_meshcntl); 1214 } 1215 } else { 1216 dir = IEEE80211_FC1_DIR_FROMDS; 1217 if (!IEEE80211_ADDR_EQ(eh.ether_shost, vap->iv_myaddr)) { 1218 /* proxy group */ 1219 meshae = IEEE80211_MESH_AE_01; 1220 meshhdrsize = 1221 sizeof(struct ieee80211_meshcntl_ae01); 1222 } else { 1223 /* group */ 1224 meshae = IEEE80211_MESH_AE_00; 1225 meshhdrsize = sizeof(struct ieee80211_meshcntl); 1226 } 1227 } 1228 } else { 1229 #endif 1230 /* 1231 * 4-address frames need to be generated for: 1232 * o packets sent through a WDS vap (IEEE80211_M_WDS) 1233 * o packets sent through a vap marked for relaying 1234 * (e.g. a station operating with dynamic WDS) 1235 */ 1236 is4addr = vap->iv_opmode == IEEE80211_M_WDS || 1237 ((vap->iv_flags_ext & IEEE80211_FEXT_4ADDR) && 1238 !IEEE80211_ADDR_EQ(eh.ether_shost, vap->iv_myaddr)); 1239 if (is4addr) 1240 hdrsize += IEEE80211_ADDR_LEN; 1241 meshhdrsize = meshae = 0; 1242 #ifdef IEEE80211_SUPPORT_MESH 1243 } 1244 #endif 1245 /* 1246 * Honor driver DATAPAD requirement. 1247 */ 1248 if (ic->ic_flags & IEEE80211_F_DATAPAD) 1249 hdrspace = roundup(hdrsize, sizeof(uint32_t)); 1250 else 1251 hdrspace = hdrsize; 1252 1253 if (__predict_true((m->m_flags & M_FF) == 0)) { 1254 /* 1255 * Normal frame. 1256 */ 1257 m = ieee80211_mbuf_adjust(vap, hdrspace + meshhdrsize, key, m); 1258 if (m == NULL) { 1259 /* NB: ieee80211_mbuf_adjust handles msgs+statistics */ 1260 goto bad; 1261 } 1262 /* NB: this could be optimized 'cuz of ieee80211_mbuf_adjust */ 1263 m_adj(m, sizeof(struct ether_header) - sizeof(struct llc)); 1264 llc = mtod(m, struct llc *); 1265 llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP; 1266 llc->llc_control = LLC_UI; 1267 llc->llc_snap.org_code[0] = 0; 1268 llc->llc_snap.org_code[1] = 0; 1269 llc->llc_snap.org_code[2] = 0; 1270 llc->llc_snap.ether_type = eh.ether_type; 1271 } else { 1272 #ifdef IEEE80211_SUPPORT_SUPERG 1273 /* 1274 * Aggregated frame. 1275 */ 1276 m = ieee80211_ff_encap(vap, m, hdrspace + meshhdrsize, key); 1277 if (m == NULL) 1278 #endif 1279 goto bad; 1280 } 1281 datalen = m->m_pkthdr.len; /* NB: w/o 802.11 header */ 1282 1283 M_PREPEND(m, hdrspace + meshhdrsize, M_NOWAIT); 1284 if (m == NULL) { 1285 vap->iv_stats.is_tx_nobuf++; 1286 goto bad; 1287 } 1288 wh = mtod(m, struct ieee80211_frame *); 1289 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_DATA; 1290 *(uint16_t *)wh->i_dur = 0; 1291 qos = NULL; /* NB: quiet compiler */ 1292 if (is4addr) { 1293 wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS; 1294 IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_macaddr); 1295 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); 1296 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_dhost); 1297 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, eh.ether_shost); 1298 } else switch (vap->iv_opmode) { 1299 case IEEE80211_M_STA: 1300 wh->i_fc[1] = IEEE80211_FC1_DIR_TODS; 1301 IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_bssid); 1302 IEEE80211_ADDR_COPY(wh->i_addr2, eh.ether_shost); 1303 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_dhost); 1304 break; 1305 case IEEE80211_M_IBSS: 1306 case IEEE80211_M_AHDEMO: 1307 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 1308 IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost); 1309 IEEE80211_ADDR_COPY(wh->i_addr2, eh.ether_shost); 1310 /* 1311 * NB: always use the bssid from iv_bss as the 1312 * neighbor's may be stale after an ibss merge 1313 */ 1314 IEEE80211_ADDR_COPY(wh->i_addr3, vap->iv_bss->ni_bssid); 1315 break; 1316 case IEEE80211_M_HOSTAP: 1317 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS; 1318 IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost); 1319 IEEE80211_ADDR_COPY(wh->i_addr2, ni->ni_bssid); 1320 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_shost); 1321 break; 1322 #ifdef IEEE80211_SUPPORT_MESH 1323 case IEEE80211_M_MBSS: 1324 /* NB: offset by hdrspace to deal with DATAPAD */ 1325 mc = (struct ieee80211_meshcntl_ae10 *) 1326 (mtod(m, uint8_t *) + hdrspace); 1327 wh->i_fc[1] = dir; 1328 switch (meshae) { 1329 case IEEE80211_MESH_AE_00: /* no proxy */ 1330 mc->mc_flags = 0; 1331 if (dir == IEEE80211_FC1_DIR_DSTODS) { /* ucast */ 1332 IEEE80211_ADDR_COPY(wh->i_addr1, 1333 ni->ni_macaddr); 1334 IEEE80211_ADDR_COPY(wh->i_addr2, 1335 vap->iv_myaddr); 1336 IEEE80211_ADDR_COPY(wh->i_addr3, 1337 eh.ether_dhost); 1338 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, 1339 eh.ether_shost); 1340 qos =((struct ieee80211_qosframe_addr4 *) 1341 wh)->i_qos; 1342 } else if (dir == IEEE80211_FC1_DIR_FROMDS) { 1343 /* mcast */ 1344 IEEE80211_ADDR_COPY(wh->i_addr1, 1345 eh.ether_dhost); 1346 IEEE80211_ADDR_COPY(wh->i_addr2, 1347 vap->iv_myaddr); 1348 IEEE80211_ADDR_COPY(wh->i_addr3, 1349 eh.ether_shost); 1350 qos = ((struct ieee80211_qosframe *) 1351 wh)->i_qos; 1352 } 1353 break; 1354 case IEEE80211_MESH_AE_01: /* mcast, proxy */ 1355 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS; 1356 IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost); 1357 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); 1358 IEEE80211_ADDR_COPY(wh->i_addr3, vap->iv_myaddr); 1359 mc->mc_flags = 1; 1360 IEEE80211_ADDR_COPY(MC01(mc)->mc_addr4, 1361 eh.ether_shost); 1362 qos = ((struct ieee80211_qosframe *) wh)->i_qos; 1363 break; 1364 case IEEE80211_MESH_AE_10: /* ucast, proxy */ 1365 KASSERT(rt != NULL, ("route is NULL")); 1366 IEEE80211_ADDR_COPY(wh->i_addr1, rt->rt_nexthop); 1367 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); 1368 IEEE80211_ADDR_COPY(wh->i_addr3, rt->rt_mesh_gate); 1369 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, vap->iv_myaddr); 1370 mc->mc_flags = IEEE80211_MESH_AE_10; 1371 IEEE80211_ADDR_COPY(mc->mc_addr5, eh.ether_dhost); 1372 IEEE80211_ADDR_COPY(mc->mc_addr6, eh.ether_shost); 1373 qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos; 1374 break; 1375 default: 1376 KASSERT(0, ("meshae %d", meshae)); 1377 break; 1378 } 1379 mc->mc_ttl = ms->ms_ttl; 1380 ms->ms_seq++; 1381 LE_WRITE_4(mc->mc_seq, ms->ms_seq); 1382 break; 1383 #endif 1384 case IEEE80211_M_WDS: /* NB: is4addr should always be true */ 1385 default: 1386 goto bad; 1387 } 1388 if (m->m_flags & M_MORE_DATA) 1389 wh->i_fc[1] |= IEEE80211_FC1_MORE_DATA; 1390 if (addqos) { 1391 int ac, tid; 1392 1393 if (is4addr) { 1394 qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos; 1395 /* NB: mesh case handled earlier */ 1396 } else if (vap->iv_opmode != IEEE80211_M_MBSS) 1397 qos = ((struct ieee80211_qosframe *) wh)->i_qos; 1398 ac = M_WME_GETAC(m); 1399 /* map from access class/queue to 11e header priorty value */ 1400 tid = WME_AC_TO_TID(ac); 1401 qos[0] = tid & IEEE80211_QOS_TID; 1402 if (ic->ic_wme.wme_wmeChanParams.cap_wmeParams[ac].wmep_noackPolicy) 1403 qos[0] |= IEEE80211_QOS_ACKPOLICY_NOACK; 1404 #ifdef IEEE80211_SUPPORT_MESH 1405 if (vap->iv_opmode == IEEE80211_M_MBSS) 1406 qos[1] = IEEE80211_QOS_MC; 1407 else 1408 #endif 1409 qos[1] = 0; 1410 wh->i_fc[0] |= IEEE80211_FC0_SUBTYPE_QOS; 1411 1412 if ((m->m_flags & M_AMPDU_MPDU) == 0) { 1413 /* 1414 * NB: don't assign a sequence # to potential 1415 * aggregates; we expect this happens at the 1416 * point the frame comes off any aggregation q 1417 * as otherwise we may introduce holes in the 1418 * BA sequence space and/or make window accouting 1419 * more difficult. 1420 * 1421 * XXX may want to control this with a driver 1422 * capability; this may also change when we pull 1423 * aggregation up into net80211 1424 */ 1425 seqno = ni->ni_txseqs[tid]++; 1426 *(uint16_t *)wh->i_seq = 1427 htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); 1428 M_SEQNO_SET(m, seqno); 1429 } 1430 } else { 1431 seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]++; 1432 *(uint16_t *)wh->i_seq = 1433 htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); 1434 M_SEQNO_SET(m, seqno); 1435 } 1436 1437 1438 /* check if xmit fragmentation is required */ 1439 txfrag = (m->m_pkthdr.len > vap->iv_fragthreshold && 1440 !IEEE80211_IS_MULTICAST(wh->i_addr1) && 1441 (vap->iv_caps & IEEE80211_C_TXFRAG) && 1442 (m->m_flags & (M_FF | M_AMPDU_MPDU)) == 0); 1443 if (key != NULL) { 1444 /* 1445 * IEEE 802.1X: send EAPOL frames always in the clear. 1446 * WPA/WPA2: encrypt EAPOL keys when pairwise keys are set. 1447 */ 1448 if ((m->m_flags & M_EAPOL) == 0 || 1449 ((vap->iv_flags & IEEE80211_F_WPA) && 1450 (vap->iv_opmode == IEEE80211_M_STA ? 1451 !IEEE80211_KEY_UNDEFINED(key) : 1452 !IEEE80211_KEY_UNDEFINED(&ni->ni_ucastkey)))) { 1453 wh->i_fc[1] |= IEEE80211_FC1_WEP; 1454 if (!ieee80211_crypto_enmic(vap, key, m, txfrag)) { 1455 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, 1456 eh.ether_dhost, 1457 "%s", "enmic failed, discard frame"); 1458 vap->iv_stats.is_crypto_enmicfail++; 1459 goto bad; 1460 } 1461 } 1462 } 1463 if (txfrag && !ieee80211_fragment(vap, m, hdrsize, 1464 key != NULL ? key->wk_cipher->ic_header : 0, vap->iv_fragthreshold)) 1465 goto bad; 1466 1467 m->m_flags |= M_ENCAP; /* mark encapsulated */ 1468 1469 IEEE80211_NODE_STAT(ni, tx_data); 1470 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1471 IEEE80211_NODE_STAT(ni, tx_mcast); 1472 m->m_flags |= M_MCAST; 1473 } else 1474 IEEE80211_NODE_STAT(ni, tx_ucast); 1475 IEEE80211_NODE_STAT_ADD(ni, tx_bytes, datalen); 1476 1477 return m; 1478 bad: 1479 if (m != NULL) 1480 m_freem(m); 1481 return NULL; 1482 #undef WH4 1483 #undef MC01 1484 } 1485 1486 /* 1487 * Fragment the frame according to the specified mtu. 1488 * The size of the 802.11 header (w/o padding) is provided 1489 * so we don't need to recalculate it. We create a new 1490 * mbuf for each fragment and chain it through m_nextpkt; 1491 * we might be able to optimize this by reusing the original 1492 * packet's mbufs but that is significantly more complicated. 1493 */ 1494 static int 1495 ieee80211_fragment(struct ieee80211vap *vap, struct mbuf *m0, 1496 u_int hdrsize, u_int ciphdrsize, u_int mtu) 1497 { 1498 struct ieee80211com *ic = vap->iv_ic; 1499 struct ieee80211_frame *wh, *whf; 1500 struct mbuf *m, *prev, *next; 1501 u_int totalhdrsize, fragno, fragsize, off, remainder, payload; 1502 u_int hdrspace; 1503 1504 KASSERT(m0->m_nextpkt == NULL, ("mbuf already chained?")); 1505 KASSERT(m0->m_pkthdr.len > mtu, 1506 ("pktlen %u mtu %u", m0->m_pkthdr.len, mtu)); 1507 1508 /* 1509 * Honor driver DATAPAD requirement. 1510 */ 1511 if (ic->ic_flags & IEEE80211_F_DATAPAD) 1512 hdrspace = roundup(hdrsize, sizeof(uint32_t)); 1513 else 1514 hdrspace = hdrsize; 1515 1516 wh = mtod(m0, struct ieee80211_frame *); 1517 /* NB: mark the first frag; it will be propagated below */ 1518 wh->i_fc[1] |= IEEE80211_FC1_MORE_FRAG; 1519 totalhdrsize = hdrspace + ciphdrsize; 1520 fragno = 1; 1521 off = mtu - ciphdrsize; 1522 remainder = m0->m_pkthdr.len - off; 1523 prev = m0; 1524 do { 1525 fragsize = totalhdrsize + remainder; 1526 if (fragsize > mtu) 1527 fragsize = mtu; 1528 /* XXX fragsize can be >2048! */ 1529 KASSERT(fragsize < MCLBYTES, 1530 ("fragment size %u too big!", fragsize)); 1531 if (fragsize > MHLEN) 1532 m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR); 1533 else 1534 m = m_gethdr(M_NOWAIT, MT_DATA); 1535 if (m == NULL) 1536 goto bad; 1537 /* leave room to prepend any cipher header */ 1538 m_align(m, fragsize - ciphdrsize); 1539 1540 /* 1541 * Form the header in the fragment. Note that since 1542 * we mark the first fragment with the MORE_FRAG bit 1543 * it automatically is propagated to each fragment; we 1544 * need only clear it on the last fragment (done below). 1545 * NB: frag 1+ dont have Mesh Control field present. 1546 */ 1547 whf = mtod(m, struct ieee80211_frame *); 1548 memcpy(whf, wh, hdrsize); 1549 #ifdef IEEE80211_SUPPORT_MESH 1550 if (vap->iv_opmode == IEEE80211_M_MBSS) { 1551 if (IEEE80211_IS_DSTODS(wh)) 1552 ((struct ieee80211_qosframe_addr4 *) 1553 whf)->i_qos[1] &= ~IEEE80211_QOS_MC; 1554 else 1555 ((struct ieee80211_qosframe *) 1556 whf)->i_qos[1] &= ~IEEE80211_QOS_MC; 1557 } 1558 #endif 1559 *(uint16_t *)&whf->i_seq[0] |= htole16( 1560 (fragno & IEEE80211_SEQ_FRAG_MASK) << 1561 IEEE80211_SEQ_FRAG_SHIFT); 1562 fragno++; 1563 1564 payload = fragsize - totalhdrsize; 1565 /* NB: destination is known to be contiguous */ 1566 1567 m_copydata(m0, off, payload, mtod(m, uint8_t *) + hdrspace); 1568 m->m_len = hdrspace + payload; 1569 m->m_pkthdr.len = hdrspace + payload; 1570 m->m_flags |= M_FRAG; 1571 1572 /* chain up the fragment */ 1573 prev->m_nextpkt = m; 1574 prev = m; 1575 1576 /* deduct fragment just formed */ 1577 remainder -= payload; 1578 off += payload; 1579 } while (remainder != 0); 1580 1581 /* set the last fragment */ 1582 m->m_flags |= M_LASTFRAG; 1583 whf->i_fc[1] &= ~IEEE80211_FC1_MORE_FRAG; 1584 1585 /* strip first mbuf now that everything has been copied */ 1586 m_adj(m0, -(m0->m_pkthdr.len - (mtu - ciphdrsize))); 1587 m0->m_flags |= M_FIRSTFRAG | M_FRAG; 1588 1589 vap->iv_stats.is_tx_fragframes++; 1590 vap->iv_stats.is_tx_frags += fragno-1; 1591 1592 return 1; 1593 bad: 1594 /* reclaim fragments but leave original frame for caller to free */ 1595 for (m = m0->m_nextpkt; m != NULL; m = next) { 1596 next = m->m_nextpkt; 1597 m->m_nextpkt = NULL; /* XXX paranoid */ 1598 m_freem(m); 1599 } 1600 m0->m_nextpkt = NULL; 1601 return 0; 1602 } 1603 1604 /* 1605 * Add a supported rates element id to a frame. 1606 */ 1607 uint8_t * 1608 ieee80211_add_rates(uint8_t *frm, const struct ieee80211_rateset *rs) 1609 { 1610 int nrates; 1611 1612 *frm++ = IEEE80211_ELEMID_RATES; 1613 nrates = rs->rs_nrates; 1614 if (nrates > IEEE80211_RATE_SIZE) 1615 nrates = IEEE80211_RATE_SIZE; 1616 *frm++ = nrates; 1617 memcpy(frm, rs->rs_rates, nrates); 1618 return frm + nrates; 1619 } 1620 1621 /* 1622 * Add an extended supported rates element id to a frame. 1623 */ 1624 uint8_t * 1625 ieee80211_add_xrates(uint8_t *frm, const struct ieee80211_rateset *rs) 1626 { 1627 /* 1628 * Add an extended supported rates element if operating in 11g mode. 1629 */ 1630 if (rs->rs_nrates > IEEE80211_RATE_SIZE) { 1631 int nrates = rs->rs_nrates - IEEE80211_RATE_SIZE; 1632 *frm++ = IEEE80211_ELEMID_XRATES; 1633 *frm++ = nrates; 1634 memcpy(frm, rs->rs_rates + IEEE80211_RATE_SIZE, nrates); 1635 frm += nrates; 1636 } 1637 return frm; 1638 } 1639 1640 /* 1641 * Add an ssid element to a frame. 1642 */ 1643 static uint8_t * 1644 ieee80211_add_ssid(uint8_t *frm, const uint8_t *ssid, u_int len) 1645 { 1646 *frm++ = IEEE80211_ELEMID_SSID; 1647 *frm++ = len; 1648 memcpy(frm, ssid, len); 1649 return frm + len; 1650 } 1651 1652 /* 1653 * Add an erp element to a frame. 1654 */ 1655 static uint8_t * 1656 ieee80211_add_erp(uint8_t *frm, struct ieee80211com *ic) 1657 { 1658 uint8_t erp; 1659 1660 *frm++ = IEEE80211_ELEMID_ERP; 1661 *frm++ = 1; 1662 erp = 0; 1663 if (ic->ic_nonerpsta != 0) 1664 erp |= IEEE80211_ERP_NON_ERP_PRESENT; 1665 if (ic->ic_flags & IEEE80211_F_USEPROT) 1666 erp |= IEEE80211_ERP_USE_PROTECTION; 1667 if (ic->ic_flags & IEEE80211_F_USEBARKER) 1668 erp |= IEEE80211_ERP_LONG_PREAMBLE; 1669 *frm++ = erp; 1670 return frm; 1671 } 1672 1673 /* 1674 * Add a CFParams element to a frame. 1675 */ 1676 static uint8_t * 1677 ieee80211_add_cfparms(uint8_t *frm, struct ieee80211com *ic) 1678 { 1679 #define ADDSHORT(frm, v) do { \ 1680 LE_WRITE_2(frm, v); \ 1681 frm += 2; \ 1682 } while (0) 1683 *frm++ = IEEE80211_ELEMID_CFPARMS; 1684 *frm++ = 6; 1685 *frm++ = 0; /* CFP count */ 1686 *frm++ = 2; /* CFP period */ 1687 ADDSHORT(frm, 0); /* CFP MaxDuration (TU) */ 1688 ADDSHORT(frm, 0); /* CFP CurRemaining (TU) */ 1689 return frm; 1690 #undef ADDSHORT 1691 } 1692 1693 static __inline uint8_t * 1694 add_appie(uint8_t *frm, const struct ieee80211_appie *ie) 1695 { 1696 memcpy(frm, ie->ie_data, ie->ie_len); 1697 return frm + ie->ie_len; 1698 } 1699 1700 static __inline uint8_t * 1701 add_ie(uint8_t *frm, const uint8_t *ie) 1702 { 1703 memcpy(frm, ie, 2 + ie[1]); 1704 return frm + 2 + ie[1]; 1705 } 1706 1707 #define WME_OUI_BYTES 0x00, 0x50, 0xf2 1708 /* 1709 * Add a WME information element to a frame. 1710 */ 1711 static uint8_t * 1712 ieee80211_add_wme_info(uint8_t *frm, struct ieee80211_wme_state *wme) 1713 { 1714 static const struct ieee80211_wme_info info = { 1715 .wme_id = IEEE80211_ELEMID_VENDOR, 1716 .wme_len = sizeof(struct ieee80211_wme_info) - 2, 1717 .wme_oui = { WME_OUI_BYTES }, 1718 .wme_type = WME_OUI_TYPE, 1719 .wme_subtype = WME_INFO_OUI_SUBTYPE, 1720 .wme_version = WME_VERSION, 1721 .wme_info = 0, 1722 }; 1723 memcpy(frm, &info, sizeof(info)); 1724 return frm + sizeof(info); 1725 } 1726 1727 /* 1728 * Add a WME parameters element to a frame. 1729 */ 1730 static uint8_t * 1731 ieee80211_add_wme_param(uint8_t *frm, struct ieee80211_wme_state *wme) 1732 { 1733 #define SM(_v, _f) (((_v) << _f##_S) & _f) 1734 #define ADDSHORT(frm, v) do { \ 1735 LE_WRITE_2(frm, v); \ 1736 frm += 2; \ 1737 } while (0) 1738 /* NB: this works 'cuz a param has an info at the front */ 1739 static const struct ieee80211_wme_info param = { 1740 .wme_id = IEEE80211_ELEMID_VENDOR, 1741 .wme_len = sizeof(struct ieee80211_wme_param) - 2, 1742 .wme_oui = { WME_OUI_BYTES }, 1743 .wme_type = WME_OUI_TYPE, 1744 .wme_subtype = WME_PARAM_OUI_SUBTYPE, 1745 .wme_version = WME_VERSION, 1746 }; 1747 int i; 1748 1749 memcpy(frm, ¶m, sizeof(param)); 1750 frm += __offsetof(struct ieee80211_wme_info, wme_info); 1751 *frm++ = wme->wme_bssChanParams.cap_info; /* AC info */ 1752 *frm++ = 0; /* reserved field */ 1753 for (i = 0; i < WME_NUM_AC; i++) { 1754 const struct wmeParams *ac = 1755 &wme->wme_bssChanParams.cap_wmeParams[i]; 1756 *frm++ = SM(i, WME_PARAM_ACI) 1757 | SM(ac->wmep_acm, WME_PARAM_ACM) 1758 | SM(ac->wmep_aifsn, WME_PARAM_AIFSN) 1759 ; 1760 *frm++ = SM(ac->wmep_logcwmax, WME_PARAM_LOGCWMAX) 1761 | SM(ac->wmep_logcwmin, WME_PARAM_LOGCWMIN) 1762 ; 1763 ADDSHORT(frm, ac->wmep_txopLimit); 1764 } 1765 return frm; 1766 #undef SM 1767 #undef ADDSHORT 1768 } 1769 #undef WME_OUI_BYTES 1770 1771 /* 1772 * Add an 11h Power Constraint element to a frame. 1773 */ 1774 static uint8_t * 1775 ieee80211_add_powerconstraint(uint8_t *frm, struct ieee80211vap *vap) 1776 { 1777 const struct ieee80211_channel *c = vap->iv_bss->ni_chan; 1778 /* XXX per-vap tx power limit? */ 1779 int8_t limit = vap->iv_ic->ic_txpowlimit / 2; 1780 1781 frm[0] = IEEE80211_ELEMID_PWRCNSTR; 1782 frm[1] = 1; 1783 frm[2] = c->ic_maxregpower > limit ? c->ic_maxregpower - limit : 0; 1784 return frm + 3; 1785 } 1786 1787 /* 1788 * Add an 11h Power Capability element to a frame. 1789 */ 1790 static uint8_t * 1791 ieee80211_add_powercapability(uint8_t *frm, const struct ieee80211_channel *c) 1792 { 1793 frm[0] = IEEE80211_ELEMID_PWRCAP; 1794 frm[1] = 2; 1795 frm[2] = c->ic_minpower; 1796 frm[3] = c->ic_maxpower; 1797 return frm + 4; 1798 } 1799 1800 /* 1801 * Add an 11h Supported Channels element to a frame. 1802 */ 1803 static uint8_t * 1804 ieee80211_add_supportedchannels(uint8_t *frm, struct ieee80211com *ic) 1805 { 1806 static const int ielen = 26; 1807 1808 frm[0] = IEEE80211_ELEMID_SUPPCHAN; 1809 frm[1] = ielen; 1810 /* XXX not correct */ 1811 memcpy(frm+2, ic->ic_chan_avail, ielen); 1812 return frm + 2 + ielen; 1813 } 1814 1815 /* 1816 * Add an 11h Quiet time element to a frame. 1817 */ 1818 static uint8_t * 1819 ieee80211_add_quiet(uint8_t *frm, struct ieee80211vap *vap) 1820 { 1821 struct ieee80211_quiet_ie *quiet = (struct ieee80211_quiet_ie *) frm; 1822 1823 quiet->quiet_ie = IEEE80211_ELEMID_QUIET; 1824 quiet->len = 6; 1825 if (vap->iv_quiet_count_value == 1) 1826 vap->iv_quiet_count_value = vap->iv_quiet_count; 1827 else if (vap->iv_quiet_count_value > 1) 1828 vap->iv_quiet_count_value--; 1829 1830 if (vap->iv_quiet_count_value == 0) { 1831 /* value 0 is reserved as per 802.11h standerd */ 1832 vap->iv_quiet_count_value = 1; 1833 } 1834 1835 quiet->tbttcount = vap->iv_quiet_count_value; 1836 quiet->period = vap->iv_quiet_period; 1837 quiet->duration = htole16(vap->iv_quiet_duration); 1838 quiet->offset = htole16(vap->iv_quiet_offset); 1839 return frm + sizeof(*quiet); 1840 } 1841 1842 /* 1843 * Add an 11h Channel Switch Announcement element to a frame. 1844 * Note that we use the per-vap CSA count to adjust the global 1845 * counter so we can use this routine to form probe response 1846 * frames and get the current count. 1847 */ 1848 static uint8_t * 1849 ieee80211_add_csa(uint8_t *frm, struct ieee80211vap *vap) 1850 { 1851 struct ieee80211com *ic = vap->iv_ic; 1852 struct ieee80211_csa_ie *csa = (struct ieee80211_csa_ie *) frm; 1853 1854 csa->csa_ie = IEEE80211_ELEMID_CSA; 1855 csa->csa_len = 3; 1856 csa->csa_mode = 1; /* XXX force quiet on channel */ 1857 csa->csa_newchan = ieee80211_chan2ieee(ic, ic->ic_csa_newchan); 1858 csa->csa_count = ic->ic_csa_count - vap->iv_csa_count; 1859 return frm + sizeof(*csa); 1860 } 1861 1862 /* 1863 * Add an 11h country information element to a frame. 1864 */ 1865 static uint8_t * 1866 ieee80211_add_countryie(uint8_t *frm, struct ieee80211com *ic) 1867 { 1868 1869 if (ic->ic_countryie == NULL || 1870 ic->ic_countryie_chan != ic->ic_bsschan) { 1871 /* 1872 * Handle lazy construction of ie. This is done on 1873 * first use and after a channel change that requires 1874 * re-calculation. 1875 */ 1876 if (ic->ic_countryie != NULL) 1877 free(ic->ic_countryie, M_80211_NODE_IE); 1878 ic->ic_countryie = ieee80211_alloc_countryie(ic); 1879 if (ic->ic_countryie == NULL) 1880 return frm; 1881 ic->ic_countryie_chan = ic->ic_bsschan; 1882 } 1883 return add_appie(frm, ic->ic_countryie); 1884 } 1885 1886 uint8_t * 1887 ieee80211_add_wpa(uint8_t *frm, const struct ieee80211vap *vap) 1888 { 1889 if (vap->iv_flags & IEEE80211_F_WPA1 && vap->iv_wpa_ie != NULL) 1890 return (add_ie(frm, vap->iv_wpa_ie)); 1891 else { 1892 /* XXX else complain? */ 1893 return (frm); 1894 } 1895 } 1896 1897 uint8_t * 1898 ieee80211_add_rsn(uint8_t *frm, const struct ieee80211vap *vap) 1899 { 1900 if (vap->iv_flags & IEEE80211_F_WPA2 && vap->iv_rsn_ie != NULL) 1901 return (add_ie(frm, vap->iv_rsn_ie)); 1902 else { 1903 /* XXX else complain? */ 1904 return (frm); 1905 } 1906 } 1907 1908 uint8_t * 1909 ieee80211_add_qos(uint8_t *frm, const struct ieee80211_node *ni) 1910 { 1911 if (ni->ni_flags & IEEE80211_NODE_QOS) { 1912 *frm++ = IEEE80211_ELEMID_QOS; 1913 *frm++ = 1; 1914 *frm++ = 0; 1915 } 1916 1917 return (frm); 1918 } 1919 1920 /* 1921 * Send a probe request frame with the specified ssid 1922 * and any optional information element data. 1923 */ 1924 int 1925 ieee80211_send_probereq(struct ieee80211_node *ni, 1926 const uint8_t sa[IEEE80211_ADDR_LEN], 1927 const uint8_t da[IEEE80211_ADDR_LEN], 1928 const uint8_t bssid[IEEE80211_ADDR_LEN], 1929 const uint8_t *ssid, size_t ssidlen) 1930 { 1931 struct ieee80211vap *vap = ni->ni_vap; 1932 struct ieee80211com *ic = ni->ni_ic; 1933 const struct ieee80211_txparam *tp; 1934 struct ieee80211_bpf_params params; 1935 struct ieee80211_frame *wh; 1936 const struct ieee80211_rateset *rs; 1937 struct mbuf *m; 1938 uint8_t *frm; 1939 int ret; 1940 1941 if (vap->iv_state == IEEE80211_S_CAC) { 1942 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni, 1943 "block %s frame in CAC state", "probe request"); 1944 vap->iv_stats.is_tx_badstate++; 1945 return EIO; /* XXX */ 1946 } 1947 1948 /* 1949 * Hold a reference on the node so it doesn't go away until after 1950 * the xmit is complete all the way in the driver. On error we 1951 * will remove our reference. 1952 */ 1953 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1954 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", 1955 __func__, __LINE__, 1956 ni, ether_sprintf(ni->ni_macaddr), 1957 ieee80211_node_refcnt(ni)+1); 1958 ieee80211_ref_node(ni); 1959 1960 /* 1961 * prreq frame format 1962 * [tlv] ssid 1963 * [tlv] supported rates 1964 * [tlv] RSN (optional) 1965 * [tlv] extended supported rates 1966 * [tlv] WPA (optional) 1967 * [tlv] user-specified ie's 1968 */ 1969 m = ieee80211_getmgtframe(&frm, 1970 ic->ic_headroom + sizeof(struct ieee80211_frame), 1971 2 + IEEE80211_NWID_LEN 1972 + 2 + IEEE80211_RATE_SIZE 1973 + sizeof(struct ieee80211_ie_wpa) 1974 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 1975 + sizeof(struct ieee80211_ie_wpa) 1976 + (vap->iv_appie_probereq != NULL ? 1977 vap->iv_appie_probereq->ie_len : 0) 1978 ); 1979 if (m == NULL) { 1980 vap->iv_stats.is_tx_nobuf++; 1981 ieee80211_free_node(ni); 1982 return ENOMEM; 1983 } 1984 1985 frm = ieee80211_add_ssid(frm, ssid, ssidlen); 1986 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 1987 frm = ieee80211_add_rates(frm, rs); 1988 frm = ieee80211_add_rsn(frm, vap); 1989 frm = ieee80211_add_xrates(frm, rs); 1990 frm = ieee80211_add_wpa(frm, vap); 1991 if (vap->iv_appie_probereq != NULL) 1992 frm = add_appie(frm, vap->iv_appie_probereq); 1993 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 1994 1995 KASSERT(M_LEADINGSPACE(m) >= sizeof(struct ieee80211_frame), 1996 ("leading space %zd", M_LEADINGSPACE(m))); 1997 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); 1998 if (m == NULL) { 1999 /* NB: cannot happen */ 2000 ieee80211_free_node(ni); 2001 return ENOMEM; 2002 } 2003 2004 IEEE80211_TX_LOCK(ic); 2005 wh = mtod(m, struct ieee80211_frame *); 2006 ieee80211_send_setup(ni, m, 2007 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ, 2008 IEEE80211_NONQOS_TID, sa, da, bssid); 2009 /* XXX power management? */ 2010 m->m_flags |= M_ENCAP; /* mark encapsulated */ 2011 2012 M_WME_SETAC(m, WME_AC_BE); 2013 2014 IEEE80211_NODE_STAT(ni, tx_probereq); 2015 IEEE80211_NODE_STAT(ni, tx_mgmt); 2016 2017 IEEE80211_DPRINTF(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS, 2018 "send probe req on channel %u bssid %s ssid \"%.*s\"\n", 2019 ieee80211_chan2ieee(ic, ic->ic_curchan), ether_sprintf(bssid), 2020 ssidlen, ssid); 2021 2022 memset(¶ms, 0, sizeof(params)); 2023 params.ibp_pri = M_WME_GETAC(m); 2024 tp = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)]; 2025 params.ibp_rate0 = tp->mgmtrate; 2026 if (IEEE80211_IS_MULTICAST(da)) { 2027 params.ibp_flags |= IEEE80211_BPF_NOACK; 2028 params.ibp_try0 = 1; 2029 } else 2030 params.ibp_try0 = tp->maxretry; 2031 params.ibp_power = ni->ni_txpower; 2032 ret = ieee80211_raw_output(vap, ni, m, ¶ms); 2033 IEEE80211_TX_UNLOCK(ic); 2034 return (ret); 2035 } 2036 2037 /* 2038 * Calculate capability information for mgt frames. 2039 */ 2040 uint16_t 2041 ieee80211_getcapinfo(struct ieee80211vap *vap, struct ieee80211_channel *chan) 2042 { 2043 struct ieee80211com *ic = vap->iv_ic; 2044 uint16_t capinfo; 2045 2046 KASSERT(vap->iv_opmode != IEEE80211_M_STA, ("station mode")); 2047 2048 if (vap->iv_opmode == IEEE80211_M_HOSTAP) 2049 capinfo = IEEE80211_CAPINFO_ESS; 2050 else if (vap->iv_opmode == IEEE80211_M_IBSS) 2051 capinfo = IEEE80211_CAPINFO_IBSS; 2052 else 2053 capinfo = 0; 2054 if (vap->iv_flags & IEEE80211_F_PRIVACY) 2055 capinfo |= IEEE80211_CAPINFO_PRIVACY; 2056 if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && 2057 IEEE80211_IS_CHAN_2GHZ(chan)) 2058 capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE; 2059 if (ic->ic_flags & IEEE80211_F_SHSLOT) 2060 capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME; 2061 if (IEEE80211_IS_CHAN_5GHZ(chan) && (vap->iv_flags & IEEE80211_F_DOTH)) 2062 capinfo |= IEEE80211_CAPINFO_SPECTRUM_MGMT; 2063 return capinfo; 2064 } 2065 2066 /* 2067 * Send a management frame. The node is for the destination (or ic_bss 2068 * when in station mode). Nodes other than ic_bss have their reference 2069 * count bumped to reflect our use for an indeterminant time. 2070 */ 2071 int 2072 ieee80211_send_mgmt(struct ieee80211_node *ni, int type, int arg) 2073 { 2074 #define HTFLAGS (IEEE80211_NODE_HT | IEEE80211_NODE_HTCOMPAT) 2075 #define senderr(_x, _v) do { vap->iv_stats._v++; ret = _x; goto bad; } while (0) 2076 struct ieee80211vap *vap = ni->ni_vap; 2077 struct ieee80211com *ic = ni->ni_ic; 2078 struct ieee80211_node *bss = vap->iv_bss; 2079 struct ieee80211_bpf_params params; 2080 struct mbuf *m; 2081 uint8_t *frm; 2082 uint16_t capinfo; 2083 int has_challenge, is_shared_key, ret, status; 2084 2085 KASSERT(ni != NULL, ("null node")); 2086 2087 /* 2088 * Hold a reference on the node so it doesn't go away until after 2089 * the xmit is complete all the way in the driver. On error we 2090 * will remove our reference. 2091 */ 2092 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2093 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", 2094 __func__, __LINE__, 2095 ni, ether_sprintf(ni->ni_macaddr), 2096 ieee80211_node_refcnt(ni)+1); 2097 ieee80211_ref_node(ni); 2098 2099 memset(¶ms, 0, sizeof(params)); 2100 switch (type) { 2101 2102 case IEEE80211_FC0_SUBTYPE_AUTH: 2103 status = arg >> 16; 2104 arg &= 0xffff; 2105 has_challenge = ((arg == IEEE80211_AUTH_SHARED_CHALLENGE || 2106 arg == IEEE80211_AUTH_SHARED_RESPONSE) && 2107 ni->ni_challenge != NULL); 2108 2109 /* 2110 * Deduce whether we're doing open authentication or 2111 * shared key authentication. We do the latter if 2112 * we're in the middle of a shared key authentication 2113 * handshake or if we're initiating an authentication 2114 * request and configured to use shared key. 2115 */ 2116 is_shared_key = has_challenge || 2117 arg >= IEEE80211_AUTH_SHARED_RESPONSE || 2118 (arg == IEEE80211_AUTH_SHARED_REQUEST && 2119 bss->ni_authmode == IEEE80211_AUTH_SHARED); 2120 2121 m = ieee80211_getmgtframe(&frm, 2122 ic->ic_headroom + sizeof(struct ieee80211_frame), 2123 3 * sizeof(uint16_t) 2124 + (has_challenge && status == IEEE80211_STATUS_SUCCESS ? 2125 sizeof(uint16_t)+IEEE80211_CHALLENGE_LEN : 0) 2126 ); 2127 if (m == NULL) 2128 senderr(ENOMEM, is_tx_nobuf); 2129 2130 ((uint16_t *)frm)[0] = 2131 (is_shared_key) ? htole16(IEEE80211_AUTH_ALG_SHARED) 2132 : htole16(IEEE80211_AUTH_ALG_OPEN); 2133 ((uint16_t *)frm)[1] = htole16(arg); /* sequence number */ 2134 ((uint16_t *)frm)[2] = htole16(status);/* status */ 2135 2136 if (has_challenge && status == IEEE80211_STATUS_SUCCESS) { 2137 ((uint16_t *)frm)[3] = 2138 htole16((IEEE80211_CHALLENGE_LEN << 8) | 2139 IEEE80211_ELEMID_CHALLENGE); 2140 memcpy(&((uint16_t *)frm)[4], ni->ni_challenge, 2141 IEEE80211_CHALLENGE_LEN); 2142 m->m_pkthdr.len = m->m_len = 2143 4 * sizeof(uint16_t) + IEEE80211_CHALLENGE_LEN; 2144 if (arg == IEEE80211_AUTH_SHARED_RESPONSE) { 2145 IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni, 2146 "request encrypt frame (%s)", __func__); 2147 /* mark frame for encryption */ 2148 params.ibp_flags |= IEEE80211_BPF_CRYPTO; 2149 } 2150 } else 2151 m->m_pkthdr.len = m->m_len = 3 * sizeof(uint16_t); 2152 2153 /* XXX not right for shared key */ 2154 if (status == IEEE80211_STATUS_SUCCESS) 2155 IEEE80211_NODE_STAT(ni, tx_auth); 2156 else 2157 IEEE80211_NODE_STAT(ni, tx_auth_fail); 2158 2159 if (vap->iv_opmode == IEEE80211_M_STA) 2160 ieee80211_add_callback(m, ieee80211_tx_mgt_cb, 2161 (void *) vap->iv_state); 2162 break; 2163 2164 case IEEE80211_FC0_SUBTYPE_DEAUTH: 2165 IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni, 2166 "send station deauthenticate (reason %d)", arg); 2167 m = ieee80211_getmgtframe(&frm, 2168 ic->ic_headroom + sizeof(struct ieee80211_frame), 2169 sizeof(uint16_t)); 2170 if (m == NULL) 2171 senderr(ENOMEM, is_tx_nobuf); 2172 *(uint16_t *)frm = htole16(arg); /* reason */ 2173 m->m_pkthdr.len = m->m_len = sizeof(uint16_t); 2174 2175 IEEE80211_NODE_STAT(ni, tx_deauth); 2176 IEEE80211_NODE_STAT_SET(ni, tx_deauth_code, arg); 2177 2178 ieee80211_node_unauthorize(ni); /* port closed */ 2179 break; 2180 2181 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 2182 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 2183 /* 2184 * asreq frame format 2185 * [2] capability information 2186 * [2] listen interval 2187 * [6*] current AP address (reassoc only) 2188 * [tlv] ssid 2189 * [tlv] supported rates 2190 * [tlv] extended supported rates 2191 * [4] power capability (optional) 2192 * [28] supported channels (optional) 2193 * [tlv] HT capabilities 2194 * [tlv] WME (optional) 2195 * [tlv] Vendor OUI HT capabilities (optional) 2196 * [tlv] Atheros capabilities (if negotiated) 2197 * [tlv] AppIE's (optional) 2198 */ 2199 m = ieee80211_getmgtframe(&frm, 2200 ic->ic_headroom + sizeof(struct ieee80211_frame), 2201 sizeof(uint16_t) 2202 + sizeof(uint16_t) 2203 + IEEE80211_ADDR_LEN 2204 + 2 + IEEE80211_NWID_LEN 2205 + 2 + IEEE80211_RATE_SIZE 2206 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2207 + 4 2208 + 2 + 26 2209 + sizeof(struct ieee80211_wme_info) 2210 + sizeof(struct ieee80211_ie_htcap) 2211 + 4 + sizeof(struct ieee80211_ie_htcap) 2212 #ifdef IEEE80211_SUPPORT_SUPERG 2213 + sizeof(struct ieee80211_ath_ie) 2214 #endif 2215 + (vap->iv_appie_wpa != NULL ? 2216 vap->iv_appie_wpa->ie_len : 0) 2217 + (vap->iv_appie_assocreq != NULL ? 2218 vap->iv_appie_assocreq->ie_len : 0) 2219 ); 2220 if (m == NULL) 2221 senderr(ENOMEM, is_tx_nobuf); 2222 2223 KASSERT(vap->iv_opmode == IEEE80211_M_STA, 2224 ("wrong mode %u", vap->iv_opmode)); 2225 capinfo = IEEE80211_CAPINFO_ESS; 2226 if (vap->iv_flags & IEEE80211_F_PRIVACY) 2227 capinfo |= IEEE80211_CAPINFO_PRIVACY; 2228 /* 2229 * NB: Some 11a AP's reject the request when 2230 * short premable is set. 2231 */ 2232 if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && 2233 IEEE80211_IS_CHAN_2GHZ(ic->ic_curchan)) 2234 capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE; 2235 if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 2236 (ic->ic_caps & IEEE80211_C_SHSLOT)) 2237 capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME; 2238 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SPECTRUM_MGMT) && 2239 (vap->iv_flags & IEEE80211_F_DOTH)) 2240 capinfo |= IEEE80211_CAPINFO_SPECTRUM_MGMT; 2241 *(uint16_t *)frm = htole16(capinfo); 2242 frm += 2; 2243 2244 KASSERT(bss->ni_intval != 0, ("beacon interval is zero!")); 2245 *(uint16_t *)frm = htole16(howmany(ic->ic_lintval, 2246 bss->ni_intval)); 2247 frm += 2; 2248 2249 if (type == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) { 2250 IEEE80211_ADDR_COPY(frm, bss->ni_bssid); 2251 frm += IEEE80211_ADDR_LEN; 2252 } 2253 2254 frm = ieee80211_add_ssid(frm, ni->ni_essid, ni->ni_esslen); 2255 frm = ieee80211_add_rates(frm, &ni->ni_rates); 2256 frm = ieee80211_add_rsn(frm, vap); 2257 frm = ieee80211_add_xrates(frm, &ni->ni_rates); 2258 if (capinfo & IEEE80211_CAPINFO_SPECTRUM_MGMT) { 2259 frm = ieee80211_add_powercapability(frm, 2260 ic->ic_curchan); 2261 frm = ieee80211_add_supportedchannels(frm, ic); 2262 } 2263 if ((vap->iv_flags_ht & IEEE80211_FHT_HT) && 2264 ni->ni_ies.htcap_ie != NULL && 2265 ni->ni_ies.htcap_ie[0] == IEEE80211_ELEMID_HTCAP) 2266 frm = ieee80211_add_htcap(frm, ni); 2267 frm = ieee80211_add_wpa(frm, vap); 2268 if ((ic->ic_flags & IEEE80211_F_WME) && 2269 ni->ni_ies.wme_ie != NULL) 2270 frm = ieee80211_add_wme_info(frm, &ic->ic_wme); 2271 if ((vap->iv_flags_ht & IEEE80211_FHT_HT) && 2272 ni->ni_ies.htcap_ie != NULL && 2273 ni->ni_ies.htcap_ie[0] == IEEE80211_ELEMID_VENDOR) 2274 frm = ieee80211_add_htcap_vendor(frm, ni); 2275 #ifdef IEEE80211_SUPPORT_SUPERG 2276 if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS)) { 2277 frm = ieee80211_add_ath(frm, 2278 IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS), 2279 ((vap->iv_flags & IEEE80211_F_WPA) == 0 && 2280 ni->ni_authmode != IEEE80211_AUTH_8021X) ? 2281 vap->iv_def_txkey : IEEE80211_KEYIX_NONE); 2282 } 2283 #endif /* IEEE80211_SUPPORT_SUPERG */ 2284 if (vap->iv_appie_assocreq != NULL) 2285 frm = add_appie(frm, vap->iv_appie_assocreq); 2286 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2287 2288 ieee80211_add_callback(m, ieee80211_tx_mgt_cb, 2289 (void *) vap->iv_state); 2290 break; 2291 2292 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 2293 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 2294 /* 2295 * asresp frame format 2296 * [2] capability information 2297 * [2] status 2298 * [2] association ID 2299 * [tlv] supported rates 2300 * [tlv] extended supported rates 2301 * [tlv] HT capabilities (standard, if STA enabled) 2302 * [tlv] HT information (standard, if STA enabled) 2303 * [tlv] WME (if configured and STA enabled) 2304 * [tlv] HT capabilities (vendor OUI, if STA enabled) 2305 * [tlv] HT information (vendor OUI, if STA enabled) 2306 * [tlv] Atheros capabilities (if STA enabled) 2307 * [tlv] AppIE's (optional) 2308 */ 2309 m = ieee80211_getmgtframe(&frm, 2310 ic->ic_headroom + sizeof(struct ieee80211_frame), 2311 sizeof(uint16_t) 2312 + sizeof(uint16_t) 2313 + sizeof(uint16_t) 2314 + 2 + IEEE80211_RATE_SIZE 2315 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2316 + sizeof(struct ieee80211_ie_htcap) + 4 2317 + sizeof(struct ieee80211_ie_htinfo) + 4 2318 + sizeof(struct ieee80211_wme_param) 2319 #ifdef IEEE80211_SUPPORT_SUPERG 2320 + sizeof(struct ieee80211_ath_ie) 2321 #endif 2322 + (vap->iv_appie_assocresp != NULL ? 2323 vap->iv_appie_assocresp->ie_len : 0) 2324 ); 2325 if (m == NULL) 2326 senderr(ENOMEM, is_tx_nobuf); 2327 2328 capinfo = ieee80211_getcapinfo(vap, bss->ni_chan); 2329 *(uint16_t *)frm = htole16(capinfo); 2330 frm += 2; 2331 2332 *(uint16_t *)frm = htole16(arg); /* status */ 2333 frm += 2; 2334 2335 if (arg == IEEE80211_STATUS_SUCCESS) { 2336 *(uint16_t *)frm = htole16(ni->ni_associd); 2337 IEEE80211_NODE_STAT(ni, tx_assoc); 2338 } else 2339 IEEE80211_NODE_STAT(ni, tx_assoc_fail); 2340 frm += 2; 2341 2342 frm = ieee80211_add_rates(frm, &ni->ni_rates); 2343 frm = ieee80211_add_xrates(frm, &ni->ni_rates); 2344 /* NB: respond according to what we received */ 2345 if ((ni->ni_flags & HTFLAGS) == IEEE80211_NODE_HT) { 2346 frm = ieee80211_add_htcap(frm, ni); 2347 frm = ieee80211_add_htinfo(frm, ni); 2348 } 2349 if ((vap->iv_flags & IEEE80211_F_WME) && 2350 ni->ni_ies.wme_ie != NULL) 2351 frm = ieee80211_add_wme_param(frm, &ic->ic_wme); 2352 if ((ni->ni_flags & HTFLAGS) == HTFLAGS) { 2353 frm = ieee80211_add_htcap_vendor(frm, ni); 2354 frm = ieee80211_add_htinfo_vendor(frm, ni); 2355 } 2356 #ifdef IEEE80211_SUPPORT_SUPERG 2357 if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS)) 2358 frm = ieee80211_add_ath(frm, 2359 IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS), 2360 ((vap->iv_flags & IEEE80211_F_WPA) == 0 && 2361 ni->ni_authmode != IEEE80211_AUTH_8021X) ? 2362 vap->iv_def_txkey : IEEE80211_KEYIX_NONE); 2363 #endif /* IEEE80211_SUPPORT_SUPERG */ 2364 if (vap->iv_appie_assocresp != NULL) 2365 frm = add_appie(frm, vap->iv_appie_assocresp); 2366 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2367 break; 2368 2369 case IEEE80211_FC0_SUBTYPE_DISASSOC: 2370 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 2371 "send station disassociate (reason %d)", arg); 2372 m = ieee80211_getmgtframe(&frm, 2373 ic->ic_headroom + sizeof(struct ieee80211_frame), 2374 sizeof(uint16_t)); 2375 if (m == NULL) 2376 senderr(ENOMEM, is_tx_nobuf); 2377 *(uint16_t *)frm = htole16(arg); /* reason */ 2378 m->m_pkthdr.len = m->m_len = sizeof(uint16_t); 2379 2380 IEEE80211_NODE_STAT(ni, tx_disassoc); 2381 IEEE80211_NODE_STAT_SET(ni, tx_disassoc_code, arg); 2382 break; 2383 2384 default: 2385 IEEE80211_NOTE(vap, IEEE80211_MSG_ANY, ni, 2386 "invalid mgmt frame type %u", type); 2387 senderr(EINVAL, is_tx_unknownmgt); 2388 /* NOTREACHED */ 2389 } 2390 2391 /* NB: force non-ProbeResp frames to the highest queue */ 2392 params.ibp_pri = WME_AC_VO; 2393 params.ibp_rate0 = bss->ni_txparms->mgmtrate; 2394 /* NB: we know all frames are unicast */ 2395 params.ibp_try0 = bss->ni_txparms->maxretry; 2396 params.ibp_power = bss->ni_txpower; 2397 return ieee80211_mgmt_output(ni, m, type, ¶ms); 2398 bad: 2399 ieee80211_free_node(ni); 2400 return ret; 2401 #undef senderr 2402 #undef HTFLAGS 2403 } 2404 2405 /* 2406 * Return an mbuf with a probe response frame in it. 2407 * Space is left to prepend and 802.11 header at the 2408 * front but it's left to the caller to fill in. 2409 */ 2410 struct mbuf * 2411 ieee80211_alloc_proberesp(struct ieee80211_node *bss, int legacy) 2412 { 2413 struct ieee80211vap *vap = bss->ni_vap; 2414 struct ieee80211com *ic = bss->ni_ic; 2415 const struct ieee80211_rateset *rs; 2416 struct mbuf *m; 2417 uint16_t capinfo; 2418 uint8_t *frm; 2419 2420 /* 2421 * probe response frame format 2422 * [8] time stamp 2423 * [2] beacon interval 2424 * [2] cabability information 2425 * [tlv] ssid 2426 * [tlv] supported rates 2427 * [tlv] parameter set (FH/DS) 2428 * [tlv] parameter set (IBSS) 2429 * [tlv] country (optional) 2430 * [3] power control (optional) 2431 * [5] channel switch announcement (CSA) (optional) 2432 * [tlv] extended rate phy (ERP) 2433 * [tlv] extended supported rates 2434 * [tlv] RSN (optional) 2435 * [tlv] HT capabilities 2436 * [tlv] HT information 2437 * [tlv] WPA (optional) 2438 * [tlv] WME (optional) 2439 * [tlv] Vendor OUI HT capabilities (optional) 2440 * [tlv] Vendor OUI HT information (optional) 2441 * [tlv] Atheros capabilities 2442 * [tlv] AppIE's (optional) 2443 * [tlv] Mesh ID (MBSS) 2444 * [tlv] Mesh Conf (MBSS) 2445 */ 2446 m = ieee80211_getmgtframe(&frm, 2447 ic->ic_headroom + sizeof(struct ieee80211_frame), 2448 8 2449 + sizeof(uint16_t) 2450 + sizeof(uint16_t) 2451 + 2 + IEEE80211_NWID_LEN 2452 + 2 + IEEE80211_RATE_SIZE 2453 + 7 /* max(7,3) */ 2454 + IEEE80211_COUNTRY_MAX_SIZE 2455 + 3 2456 + sizeof(struct ieee80211_csa_ie) 2457 + sizeof(struct ieee80211_quiet_ie) 2458 + 3 2459 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2460 + sizeof(struct ieee80211_ie_wpa) 2461 + sizeof(struct ieee80211_ie_htcap) 2462 + sizeof(struct ieee80211_ie_htinfo) 2463 + sizeof(struct ieee80211_ie_wpa) 2464 + sizeof(struct ieee80211_wme_param) 2465 + 4 + sizeof(struct ieee80211_ie_htcap) 2466 + 4 + sizeof(struct ieee80211_ie_htinfo) 2467 #ifdef IEEE80211_SUPPORT_SUPERG 2468 + sizeof(struct ieee80211_ath_ie) 2469 #endif 2470 #ifdef IEEE80211_SUPPORT_MESH 2471 + 2 + IEEE80211_MESHID_LEN 2472 + sizeof(struct ieee80211_meshconf_ie) 2473 #endif 2474 + (vap->iv_appie_proberesp != NULL ? 2475 vap->iv_appie_proberesp->ie_len : 0) 2476 ); 2477 if (m == NULL) { 2478 vap->iv_stats.is_tx_nobuf++; 2479 return NULL; 2480 } 2481 2482 memset(frm, 0, 8); /* timestamp should be filled later */ 2483 frm += 8; 2484 *(uint16_t *)frm = htole16(bss->ni_intval); 2485 frm += 2; 2486 capinfo = ieee80211_getcapinfo(vap, bss->ni_chan); 2487 *(uint16_t *)frm = htole16(capinfo); 2488 frm += 2; 2489 2490 frm = ieee80211_add_ssid(frm, bss->ni_essid, bss->ni_esslen); 2491 rs = ieee80211_get_suprates(ic, bss->ni_chan); 2492 frm = ieee80211_add_rates(frm, rs); 2493 2494 if (IEEE80211_IS_CHAN_FHSS(bss->ni_chan)) { 2495 *frm++ = IEEE80211_ELEMID_FHPARMS; 2496 *frm++ = 5; 2497 *frm++ = bss->ni_fhdwell & 0x00ff; 2498 *frm++ = (bss->ni_fhdwell >> 8) & 0x00ff; 2499 *frm++ = IEEE80211_FH_CHANSET( 2500 ieee80211_chan2ieee(ic, bss->ni_chan)); 2501 *frm++ = IEEE80211_FH_CHANPAT( 2502 ieee80211_chan2ieee(ic, bss->ni_chan)); 2503 *frm++ = bss->ni_fhindex; 2504 } else { 2505 *frm++ = IEEE80211_ELEMID_DSPARMS; 2506 *frm++ = 1; 2507 *frm++ = ieee80211_chan2ieee(ic, bss->ni_chan); 2508 } 2509 2510 if (vap->iv_opmode == IEEE80211_M_IBSS) { 2511 *frm++ = IEEE80211_ELEMID_IBSSPARMS; 2512 *frm++ = 2; 2513 *frm++ = 0; *frm++ = 0; /* TODO: ATIM window */ 2514 } 2515 if ((vap->iv_flags & IEEE80211_F_DOTH) || 2516 (vap->iv_flags_ext & IEEE80211_FEXT_DOTD)) 2517 frm = ieee80211_add_countryie(frm, ic); 2518 if (vap->iv_flags & IEEE80211_F_DOTH) { 2519 if (IEEE80211_IS_CHAN_5GHZ(bss->ni_chan)) 2520 frm = ieee80211_add_powerconstraint(frm, vap); 2521 if (ic->ic_flags & IEEE80211_F_CSAPENDING) 2522 frm = ieee80211_add_csa(frm, vap); 2523 } 2524 if (vap->iv_flags & IEEE80211_F_DOTH) { 2525 if (IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) && 2526 (vap->iv_flags_ext & IEEE80211_FEXT_DFS)) { 2527 if (vap->iv_quiet) 2528 frm = ieee80211_add_quiet(frm, vap); 2529 } 2530 } 2531 if (IEEE80211_IS_CHAN_ANYG(bss->ni_chan)) 2532 frm = ieee80211_add_erp(frm, ic); 2533 frm = ieee80211_add_xrates(frm, rs); 2534 frm = ieee80211_add_rsn(frm, vap); 2535 /* 2536 * NB: legacy 11b clients do not get certain ie's. 2537 * The caller identifies such clients by passing 2538 * a token in legacy to us. Could expand this to be 2539 * any legacy client for stuff like HT ie's. 2540 */ 2541 if (IEEE80211_IS_CHAN_HT(bss->ni_chan) && 2542 legacy != IEEE80211_SEND_LEGACY_11B) { 2543 frm = ieee80211_add_htcap(frm, bss); 2544 frm = ieee80211_add_htinfo(frm, bss); 2545 } 2546 frm = ieee80211_add_wpa(frm, vap); 2547 if (vap->iv_flags & IEEE80211_F_WME) 2548 frm = ieee80211_add_wme_param(frm, &ic->ic_wme); 2549 if (IEEE80211_IS_CHAN_HT(bss->ni_chan) && 2550 (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) && 2551 legacy != IEEE80211_SEND_LEGACY_11B) { 2552 frm = ieee80211_add_htcap_vendor(frm, bss); 2553 frm = ieee80211_add_htinfo_vendor(frm, bss); 2554 } 2555 #ifdef IEEE80211_SUPPORT_SUPERG 2556 if ((vap->iv_flags & IEEE80211_F_ATHEROS) && 2557 legacy != IEEE80211_SEND_LEGACY_11B) 2558 frm = ieee80211_add_athcaps(frm, bss); 2559 #endif 2560 if (vap->iv_appie_proberesp != NULL) 2561 frm = add_appie(frm, vap->iv_appie_proberesp); 2562 #ifdef IEEE80211_SUPPORT_MESH 2563 if (vap->iv_opmode == IEEE80211_M_MBSS) { 2564 frm = ieee80211_add_meshid(frm, vap); 2565 frm = ieee80211_add_meshconf(frm, vap); 2566 } 2567 #endif 2568 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2569 2570 return m; 2571 } 2572 2573 /* 2574 * Send a probe response frame to the specified mac address. 2575 * This does not go through the normal mgt frame api so we 2576 * can specify the destination address and re-use the bss node 2577 * for the sta reference. 2578 */ 2579 int 2580 ieee80211_send_proberesp(struct ieee80211vap *vap, 2581 const uint8_t da[IEEE80211_ADDR_LEN], int legacy) 2582 { 2583 struct ieee80211_node *bss = vap->iv_bss; 2584 struct ieee80211com *ic = vap->iv_ic; 2585 struct ieee80211_frame *wh; 2586 struct mbuf *m; 2587 int ret; 2588 2589 if (vap->iv_state == IEEE80211_S_CAC) { 2590 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, bss, 2591 "block %s frame in CAC state", "probe response"); 2592 vap->iv_stats.is_tx_badstate++; 2593 return EIO; /* XXX */ 2594 } 2595 2596 /* 2597 * Hold a reference on the node so it doesn't go away until after 2598 * the xmit is complete all the way in the driver. On error we 2599 * will remove our reference. 2600 */ 2601 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2602 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", 2603 __func__, __LINE__, bss, ether_sprintf(bss->ni_macaddr), 2604 ieee80211_node_refcnt(bss)+1); 2605 ieee80211_ref_node(bss); 2606 2607 m = ieee80211_alloc_proberesp(bss, legacy); 2608 if (m == NULL) { 2609 ieee80211_free_node(bss); 2610 return ENOMEM; 2611 } 2612 2613 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); 2614 KASSERT(m != NULL, ("no room for header")); 2615 2616 IEEE80211_TX_LOCK(ic); 2617 wh = mtod(m, struct ieee80211_frame *); 2618 ieee80211_send_setup(bss, m, 2619 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_RESP, 2620 IEEE80211_NONQOS_TID, vap->iv_myaddr, da, bss->ni_bssid); 2621 /* XXX power management? */ 2622 m->m_flags |= M_ENCAP; /* mark encapsulated */ 2623 2624 M_WME_SETAC(m, WME_AC_BE); 2625 2626 IEEE80211_DPRINTF(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS, 2627 "send probe resp on channel %u to %s%s\n", 2628 ieee80211_chan2ieee(ic, ic->ic_curchan), ether_sprintf(da), 2629 legacy ? " <legacy>" : ""); 2630 IEEE80211_NODE_STAT(bss, tx_mgmt); 2631 2632 ret = ieee80211_raw_output(vap, bss, m, NULL); 2633 IEEE80211_TX_UNLOCK(ic); 2634 return (ret); 2635 } 2636 2637 /* 2638 * Allocate and build a RTS (Request To Send) control frame. 2639 */ 2640 struct mbuf * 2641 ieee80211_alloc_rts(struct ieee80211com *ic, 2642 const uint8_t ra[IEEE80211_ADDR_LEN], 2643 const uint8_t ta[IEEE80211_ADDR_LEN], 2644 uint16_t dur) 2645 { 2646 struct ieee80211_frame_rts *rts; 2647 struct mbuf *m; 2648 2649 /* XXX honor ic_headroom */ 2650 m = m_gethdr(M_NOWAIT, MT_DATA); 2651 if (m != NULL) { 2652 rts = mtod(m, struct ieee80211_frame_rts *); 2653 rts->i_fc[0] = IEEE80211_FC0_VERSION_0 | 2654 IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_RTS; 2655 rts->i_fc[1] = IEEE80211_FC1_DIR_NODS; 2656 *(u_int16_t *)rts->i_dur = htole16(dur); 2657 IEEE80211_ADDR_COPY(rts->i_ra, ra); 2658 IEEE80211_ADDR_COPY(rts->i_ta, ta); 2659 2660 m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_rts); 2661 } 2662 return m; 2663 } 2664 2665 /* 2666 * Allocate and build a CTS (Clear To Send) control frame. 2667 */ 2668 struct mbuf * 2669 ieee80211_alloc_cts(struct ieee80211com *ic, 2670 const uint8_t ra[IEEE80211_ADDR_LEN], uint16_t dur) 2671 { 2672 struct ieee80211_frame_cts *cts; 2673 struct mbuf *m; 2674 2675 /* XXX honor ic_headroom */ 2676 m = m_gethdr(M_NOWAIT, MT_DATA); 2677 if (m != NULL) { 2678 cts = mtod(m, struct ieee80211_frame_cts *); 2679 cts->i_fc[0] = IEEE80211_FC0_VERSION_0 | 2680 IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_CTS; 2681 cts->i_fc[1] = IEEE80211_FC1_DIR_NODS; 2682 *(u_int16_t *)cts->i_dur = htole16(dur); 2683 IEEE80211_ADDR_COPY(cts->i_ra, ra); 2684 2685 m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_cts); 2686 } 2687 return m; 2688 } 2689 2690 static void 2691 ieee80211_tx_mgt_timeout(void *arg) 2692 { 2693 struct ieee80211_node *ni = arg; 2694 struct ieee80211vap *vap = ni->ni_vap; 2695 2696 if (vap->iv_state != IEEE80211_S_INIT && 2697 (vap->iv_ic->ic_flags & IEEE80211_F_SCAN) == 0) { 2698 /* 2699 * NB: it's safe to specify a timeout as the reason here; 2700 * it'll only be used in the right state. 2701 */ 2702 ieee80211_new_state(vap, IEEE80211_S_SCAN, 2703 IEEE80211_SCAN_FAIL_TIMEOUT); 2704 } 2705 } 2706 2707 static void 2708 ieee80211_tx_mgt_cb(struct ieee80211_node *ni, void *arg, int status) 2709 { 2710 struct ieee80211vap *vap = ni->ni_vap; 2711 enum ieee80211_state ostate = (enum ieee80211_state) arg; 2712 2713 /* 2714 * Frame transmit completed; arrange timer callback. If 2715 * transmit was successfuly we wait for response. Otherwise 2716 * we arrange an immediate callback instead of doing the 2717 * callback directly since we don't know what state the driver 2718 * is in (e.g. what locks it is holding). This work should 2719 * not be too time-critical and not happen too often so the 2720 * added overhead is acceptable. 2721 * 2722 * XXX what happens if !acked but response shows up before callback? 2723 */ 2724 if (vap->iv_state == ostate) 2725 callout_reset(&vap->iv_mgtsend, 2726 status == 0 ? IEEE80211_TRANS_WAIT*hz : 0, 2727 ieee80211_tx_mgt_timeout, ni); 2728 } 2729 2730 static void 2731 ieee80211_beacon_construct(struct mbuf *m, uint8_t *frm, 2732 struct ieee80211_beacon_offsets *bo, struct ieee80211_node *ni) 2733 { 2734 struct ieee80211vap *vap = ni->ni_vap; 2735 struct ieee80211com *ic = ni->ni_ic; 2736 struct ieee80211_rateset *rs = &ni->ni_rates; 2737 uint16_t capinfo; 2738 2739 /* 2740 * beacon frame format 2741 * [8] time stamp 2742 * [2] beacon interval 2743 * [2] cabability information 2744 * [tlv] ssid 2745 * [tlv] supported rates 2746 * [3] parameter set (DS) 2747 * [8] CF parameter set (optional) 2748 * [tlv] parameter set (IBSS/TIM) 2749 * [tlv] country (optional) 2750 * [3] power control (optional) 2751 * [5] channel switch announcement (CSA) (optional) 2752 * [tlv] extended rate phy (ERP) 2753 * [tlv] extended supported rates 2754 * [tlv] RSN parameters 2755 * [tlv] HT capabilities 2756 * [tlv] HT information 2757 * XXX Vendor-specific OIDs (e.g. Atheros) 2758 * [tlv] WPA parameters 2759 * [tlv] WME parameters 2760 * [tlv] Vendor OUI HT capabilities (optional) 2761 * [tlv] Vendor OUI HT information (optional) 2762 * [tlv] Atheros capabilities (optional) 2763 * [tlv] TDMA parameters (optional) 2764 * [tlv] Mesh ID (MBSS) 2765 * [tlv] Mesh Conf (MBSS) 2766 * [tlv] application data (optional) 2767 */ 2768 2769 memset(bo, 0, sizeof(*bo)); 2770 2771 memset(frm, 0, 8); /* XXX timestamp is set by hardware/driver */ 2772 frm += 8; 2773 *(uint16_t *)frm = htole16(ni->ni_intval); 2774 frm += 2; 2775 capinfo = ieee80211_getcapinfo(vap, ni->ni_chan); 2776 bo->bo_caps = (uint16_t *)frm; 2777 *(uint16_t *)frm = htole16(capinfo); 2778 frm += 2; 2779 *frm++ = IEEE80211_ELEMID_SSID; 2780 if ((vap->iv_flags & IEEE80211_F_HIDESSID) == 0) { 2781 *frm++ = ni->ni_esslen; 2782 memcpy(frm, ni->ni_essid, ni->ni_esslen); 2783 frm += ni->ni_esslen; 2784 } else 2785 *frm++ = 0; 2786 frm = ieee80211_add_rates(frm, rs); 2787 if (!IEEE80211_IS_CHAN_FHSS(ni->ni_chan)) { 2788 *frm++ = IEEE80211_ELEMID_DSPARMS; 2789 *frm++ = 1; 2790 *frm++ = ieee80211_chan2ieee(ic, ni->ni_chan); 2791 } 2792 if (ic->ic_flags & IEEE80211_F_PCF) { 2793 bo->bo_cfp = frm; 2794 frm = ieee80211_add_cfparms(frm, ic); 2795 } 2796 bo->bo_tim = frm; 2797 if (vap->iv_opmode == IEEE80211_M_IBSS) { 2798 *frm++ = IEEE80211_ELEMID_IBSSPARMS; 2799 *frm++ = 2; 2800 *frm++ = 0; *frm++ = 0; /* TODO: ATIM window */ 2801 bo->bo_tim_len = 0; 2802 } else if (vap->iv_opmode == IEEE80211_M_HOSTAP || 2803 vap->iv_opmode == IEEE80211_M_MBSS) { 2804 /* TIM IE is the same for Mesh and Hostap */ 2805 struct ieee80211_tim_ie *tie = (struct ieee80211_tim_ie *) frm; 2806 2807 tie->tim_ie = IEEE80211_ELEMID_TIM; 2808 tie->tim_len = 4; /* length */ 2809 tie->tim_count = 0; /* DTIM count */ 2810 tie->tim_period = vap->iv_dtim_period; /* DTIM period */ 2811 tie->tim_bitctl = 0; /* bitmap control */ 2812 tie->tim_bitmap[0] = 0; /* Partial Virtual Bitmap */ 2813 frm += sizeof(struct ieee80211_tim_ie); 2814 bo->bo_tim_len = 1; 2815 } 2816 bo->bo_tim_trailer = frm; 2817 if ((vap->iv_flags & IEEE80211_F_DOTH) || 2818 (vap->iv_flags_ext & IEEE80211_FEXT_DOTD)) 2819 frm = ieee80211_add_countryie(frm, ic); 2820 if (vap->iv_flags & IEEE80211_F_DOTH) { 2821 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 2822 frm = ieee80211_add_powerconstraint(frm, vap); 2823 bo->bo_csa = frm; 2824 if (ic->ic_flags & IEEE80211_F_CSAPENDING) 2825 frm = ieee80211_add_csa(frm, vap); 2826 } else 2827 bo->bo_csa = frm; 2828 2829 if (vap->iv_flags & IEEE80211_F_DOTH) { 2830 bo->bo_quiet = frm; 2831 if (IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) && 2832 (vap->iv_flags_ext & IEEE80211_FEXT_DFS)) { 2833 if (vap->iv_quiet) 2834 frm = ieee80211_add_quiet(frm,vap); 2835 } 2836 } else 2837 bo->bo_quiet = frm; 2838 2839 if (IEEE80211_IS_CHAN_ANYG(ni->ni_chan)) { 2840 bo->bo_erp = frm; 2841 frm = ieee80211_add_erp(frm, ic); 2842 } 2843 frm = ieee80211_add_xrates(frm, rs); 2844 frm = ieee80211_add_rsn(frm, vap); 2845 if (IEEE80211_IS_CHAN_HT(ni->ni_chan)) { 2846 frm = ieee80211_add_htcap(frm, ni); 2847 bo->bo_htinfo = frm; 2848 frm = ieee80211_add_htinfo(frm, ni); 2849 } 2850 frm = ieee80211_add_wpa(frm, vap); 2851 if (vap->iv_flags & IEEE80211_F_WME) { 2852 bo->bo_wme = frm; 2853 frm = ieee80211_add_wme_param(frm, &ic->ic_wme); 2854 } 2855 if (IEEE80211_IS_CHAN_HT(ni->ni_chan) && 2856 (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT)) { 2857 frm = ieee80211_add_htcap_vendor(frm, ni); 2858 frm = ieee80211_add_htinfo_vendor(frm, ni); 2859 } 2860 #ifdef IEEE80211_SUPPORT_SUPERG 2861 if (vap->iv_flags & IEEE80211_F_ATHEROS) { 2862 bo->bo_ath = frm; 2863 frm = ieee80211_add_athcaps(frm, ni); 2864 } 2865 #endif 2866 #ifdef IEEE80211_SUPPORT_TDMA 2867 if (vap->iv_caps & IEEE80211_C_TDMA) { 2868 bo->bo_tdma = frm; 2869 frm = ieee80211_add_tdma(frm, vap); 2870 } 2871 #endif 2872 if (vap->iv_appie_beacon != NULL) { 2873 bo->bo_appie = frm; 2874 bo->bo_appie_len = vap->iv_appie_beacon->ie_len; 2875 frm = add_appie(frm, vap->iv_appie_beacon); 2876 } 2877 #ifdef IEEE80211_SUPPORT_MESH 2878 if (vap->iv_opmode == IEEE80211_M_MBSS) { 2879 frm = ieee80211_add_meshid(frm, vap); 2880 bo->bo_meshconf = frm; 2881 frm = ieee80211_add_meshconf(frm, vap); 2882 } 2883 #endif 2884 bo->bo_tim_trailer_len = frm - bo->bo_tim_trailer; 2885 bo->bo_csa_trailer_len = frm - bo->bo_csa; 2886 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2887 } 2888 2889 /* 2890 * Allocate a beacon frame and fillin the appropriate bits. 2891 */ 2892 struct mbuf * 2893 ieee80211_beacon_alloc(struct ieee80211_node *ni, 2894 struct ieee80211_beacon_offsets *bo) 2895 { 2896 struct ieee80211vap *vap = ni->ni_vap; 2897 struct ieee80211com *ic = ni->ni_ic; 2898 struct ifnet *ifp = vap->iv_ifp; 2899 struct ieee80211_frame *wh; 2900 struct mbuf *m; 2901 int pktlen; 2902 uint8_t *frm; 2903 2904 /* 2905 * beacon frame format 2906 * [8] time stamp 2907 * [2] beacon interval 2908 * [2] cabability information 2909 * [tlv] ssid 2910 * [tlv] supported rates 2911 * [3] parameter set (DS) 2912 * [8] CF parameter set (optional) 2913 * [tlv] parameter set (IBSS/TIM) 2914 * [tlv] country (optional) 2915 * [3] power control (optional) 2916 * [5] channel switch announcement (CSA) (optional) 2917 * [tlv] extended rate phy (ERP) 2918 * [tlv] extended supported rates 2919 * [tlv] RSN parameters 2920 * [tlv] HT capabilities 2921 * [tlv] HT information 2922 * [tlv] Vendor OUI HT capabilities (optional) 2923 * [tlv] Vendor OUI HT information (optional) 2924 * XXX Vendor-specific OIDs (e.g. Atheros) 2925 * [tlv] WPA parameters 2926 * [tlv] WME parameters 2927 * [tlv] TDMA parameters (optional) 2928 * [tlv] Mesh ID (MBSS) 2929 * [tlv] Mesh Conf (MBSS) 2930 * [tlv] application data (optional) 2931 * NB: we allocate the max space required for the TIM bitmap. 2932 * XXX how big is this? 2933 */ 2934 pktlen = 8 /* time stamp */ 2935 + sizeof(uint16_t) /* beacon interval */ 2936 + sizeof(uint16_t) /* capabilities */ 2937 + 2 + ni->ni_esslen /* ssid */ 2938 + 2 + IEEE80211_RATE_SIZE /* supported rates */ 2939 + 2 + 1 /* DS parameters */ 2940 + 2 + 6 /* CF parameters */ 2941 + 2 + 4 + vap->iv_tim_len /* DTIM/IBSSPARMS */ 2942 + IEEE80211_COUNTRY_MAX_SIZE /* country */ 2943 + 2 + 1 /* power control */ 2944 + sizeof(struct ieee80211_csa_ie) /* CSA */ 2945 + sizeof(struct ieee80211_quiet_ie) /* Quiet */ 2946 + 2 + 1 /* ERP */ 2947 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2948 + (vap->iv_caps & IEEE80211_C_WPA ? /* WPA 1+2 */ 2949 2*sizeof(struct ieee80211_ie_wpa) : 0) 2950 /* XXX conditional? */ 2951 + 4+2*sizeof(struct ieee80211_ie_htcap)/* HT caps */ 2952 + 4+2*sizeof(struct ieee80211_ie_htinfo)/* HT info */ 2953 + (vap->iv_caps & IEEE80211_C_WME ? /* WME */ 2954 sizeof(struct ieee80211_wme_param) : 0) 2955 #ifdef IEEE80211_SUPPORT_SUPERG 2956 + sizeof(struct ieee80211_ath_ie) /* ATH */ 2957 #endif 2958 #ifdef IEEE80211_SUPPORT_TDMA 2959 + (vap->iv_caps & IEEE80211_C_TDMA ? /* TDMA */ 2960 sizeof(struct ieee80211_tdma_param) : 0) 2961 #endif 2962 #ifdef IEEE80211_SUPPORT_MESH 2963 + 2 + ni->ni_meshidlen 2964 + sizeof(struct ieee80211_meshconf_ie) 2965 #endif 2966 + IEEE80211_MAX_APPIE 2967 ; 2968 m = ieee80211_getmgtframe(&frm, 2969 ic->ic_headroom + sizeof(struct ieee80211_frame), pktlen); 2970 if (m == NULL) { 2971 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY, 2972 "%s: cannot get buf; size %u\n", __func__, pktlen); 2973 vap->iv_stats.is_tx_nobuf++; 2974 return NULL; 2975 } 2976 ieee80211_beacon_construct(m, frm, bo, ni); 2977 2978 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); 2979 KASSERT(m != NULL, ("no space for 802.11 header?")); 2980 wh = mtod(m, struct ieee80211_frame *); 2981 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT | 2982 IEEE80211_FC0_SUBTYPE_BEACON; 2983 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 2984 *(uint16_t *)wh->i_dur = 0; 2985 IEEE80211_ADDR_COPY(wh->i_addr1, ifp->if_broadcastaddr); 2986 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); 2987 IEEE80211_ADDR_COPY(wh->i_addr3, ni->ni_bssid); 2988 *(uint16_t *)wh->i_seq = 0; 2989 2990 return m; 2991 } 2992 2993 /* 2994 * Update the dynamic parts of a beacon frame based on the current state. 2995 */ 2996 int 2997 ieee80211_beacon_update(struct ieee80211_node *ni, 2998 struct ieee80211_beacon_offsets *bo, struct mbuf *m, int mcast) 2999 { 3000 struct ieee80211vap *vap = ni->ni_vap; 3001 struct ieee80211com *ic = ni->ni_ic; 3002 int len_changed = 0; 3003 uint16_t capinfo; 3004 struct ieee80211_frame *wh; 3005 ieee80211_seq seqno; 3006 3007 IEEE80211_LOCK(ic); 3008 /* 3009 * Handle 11h channel change when we've reached the count. 3010 * We must recalculate the beacon frame contents to account 3011 * for the new channel. Note we do this only for the first 3012 * vap that reaches this point; subsequent vaps just update 3013 * their beacon state to reflect the recalculated channel. 3014 */ 3015 if (isset(bo->bo_flags, IEEE80211_BEACON_CSA) && 3016 vap->iv_csa_count == ic->ic_csa_count) { 3017 vap->iv_csa_count = 0; 3018 /* 3019 * Effect channel change before reconstructing the beacon 3020 * frame contents as many places reference ni_chan. 3021 */ 3022 if (ic->ic_csa_newchan != NULL) 3023 ieee80211_csa_completeswitch(ic); 3024 /* 3025 * NB: ieee80211_beacon_construct clears all pending 3026 * updates in bo_flags so we don't need to explicitly 3027 * clear IEEE80211_BEACON_CSA. 3028 */ 3029 ieee80211_beacon_construct(m, 3030 mtod(m, uint8_t*) + sizeof(struct ieee80211_frame), bo, ni); 3031 3032 /* XXX do WME aggressive mode processing? */ 3033 IEEE80211_UNLOCK(ic); 3034 return 1; /* just assume length changed */ 3035 } 3036 3037 wh = mtod(m, struct ieee80211_frame *); 3038 seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]++; 3039 *(uint16_t *)&wh->i_seq[0] = 3040 htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); 3041 M_SEQNO_SET(m, seqno); 3042 3043 /* XXX faster to recalculate entirely or just changes? */ 3044 capinfo = ieee80211_getcapinfo(vap, ni->ni_chan); 3045 *bo->bo_caps = htole16(capinfo); 3046 3047 if (vap->iv_flags & IEEE80211_F_WME) { 3048 struct ieee80211_wme_state *wme = &ic->ic_wme; 3049 3050 /* 3051 * Check for agressive mode change. When there is 3052 * significant high priority traffic in the BSS 3053 * throttle back BE traffic by using conservative 3054 * parameters. Otherwise BE uses agressive params 3055 * to optimize performance of legacy/non-QoS traffic. 3056 */ 3057 if (wme->wme_flags & WME_F_AGGRMODE) { 3058 if (wme->wme_hipri_traffic > 3059 wme->wme_hipri_switch_thresh) { 3060 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 3061 "%s: traffic %u, disable aggressive mode\n", 3062 __func__, wme->wme_hipri_traffic); 3063 wme->wme_flags &= ~WME_F_AGGRMODE; 3064 ieee80211_wme_updateparams_locked(vap); 3065 wme->wme_hipri_traffic = 3066 wme->wme_hipri_switch_hysteresis; 3067 } else 3068 wme->wme_hipri_traffic = 0; 3069 } else { 3070 if (wme->wme_hipri_traffic <= 3071 wme->wme_hipri_switch_thresh) { 3072 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 3073 "%s: traffic %u, enable aggressive mode\n", 3074 __func__, wme->wme_hipri_traffic); 3075 wme->wme_flags |= WME_F_AGGRMODE; 3076 ieee80211_wme_updateparams_locked(vap); 3077 wme->wme_hipri_traffic = 0; 3078 } else 3079 wme->wme_hipri_traffic = 3080 wme->wme_hipri_switch_hysteresis; 3081 } 3082 if (isset(bo->bo_flags, IEEE80211_BEACON_WME)) { 3083 (void) ieee80211_add_wme_param(bo->bo_wme, wme); 3084 clrbit(bo->bo_flags, IEEE80211_BEACON_WME); 3085 } 3086 } 3087 3088 if (isset(bo->bo_flags, IEEE80211_BEACON_HTINFO)) { 3089 ieee80211_ht_update_beacon(vap, bo); 3090 clrbit(bo->bo_flags, IEEE80211_BEACON_HTINFO); 3091 } 3092 #ifdef IEEE80211_SUPPORT_TDMA 3093 if (vap->iv_caps & IEEE80211_C_TDMA) { 3094 /* 3095 * NB: the beacon is potentially updated every TBTT. 3096 */ 3097 ieee80211_tdma_update_beacon(vap, bo); 3098 } 3099 #endif 3100 #ifdef IEEE80211_SUPPORT_MESH 3101 if (vap->iv_opmode == IEEE80211_M_MBSS) 3102 ieee80211_mesh_update_beacon(vap, bo); 3103 #endif 3104 3105 if (vap->iv_opmode == IEEE80211_M_HOSTAP || 3106 vap->iv_opmode == IEEE80211_M_MBSS) { /* NB: no IBSS support*/ 3107 struct ieee80211_tim_ie *tie = 3108 (struct ieee80211_tim_ie *) bo->bo_tim; 3109 if (isset(bo->bo_flags, IEEE80211_BEACON_TIM)) { 3110 u_int timlen, timoff, i; 3111 /* 3112 * ATIM/DTIM needs updating. If it fits in the 3113 * current space allocated then just copy in the 3114 * new bits. Otherwise we need to move any trailing 3115 * data to make room. Note that we know there is 3116 * contiguous space because ieee80211_beacon_allocate 3117 * insures there is space in the mbuf to write a 3118 * maximal-size virtual bitmap (based on iv_max_aid). 3119 */ 3120 /* 3121 * Calculate the bitmap size and offset, copy any 3122 * trailer out of the way, and then copy in the 3123 * new bitmap and update the information element. 3124 * Note that the tim bitmap must contain at least 3125 * one byte and any offset must be even. 3126 */ 3127 if (vap->iv_ps_pending != 0) { 3128 timoff = 128; /* impossibly large */ 3129 for (i = 0; i < vap->iv_tim_len; i++) 3130 if (vap->iv_tim_bitmap[i]) { 3131 timoff = i &~ 1; 3132 break; 3133 } 3134 KASSERT(timoff != 128, ("tim bitmap empty!")); 3135 for (i = vap->iv_tim_len-1; i >= timoff; i--) 3136 if (vap->iv_tim_bitmap[i]) 3137 break; 3138 timlen = 1 + (i - timoff); 3139 } else { 3140 timoff = 0; 3141 timlen = 1; 3142 } 3143 if (timlen != bo->bo_tim_len) { 3144 /* copy up/down trailer */ 3145 int adjust = tie->tim_bitmap+timlen 3146 - bo->bo_tim_trailer; 3147 ovbcopy(bo->bo_tim_trailer, 3148 bo->bo_tim_trailer+adjust, 3149 bo->bo_tim_trailer_len); 3150 bo->bo_tim_trailer += adjust; 3151 bo->bo_erp += adjust; 3152 bo->bo_htinfo += adjust; 3153 #ifdef IEEE80211_SUPPORT_SUPERG 3154 bo->bo_ath += adjust; 3155 #endif 3156 #ifdef IEEE80211_SUPPORT_TDMA 3157 bo->bo_tdma += adjust; 3158 #endif 3159 #ifdef IEEE80211_SUPPORT_MESH 3160 bo->bo_meshconf += adjust; 3161 #endif 3162 bo->bo_appie += adjust; 3163 bo->bo_wme += adjust; 3164 bo->bo_csa += adjust; 3165 bo->bo_quiet += adjust; 3166 bo->bo_tim_len = timlen; 3167 3168 /* update information element */ 3169 tie->tim_len = 3 + timlen; 3170 tie->tim_bitctl = timoff; 3171 len_changed = 1; 3172 } 3173 memcpy(tie->tim_bitmap, vap->iv_tim_bitmap + timoff, 3174 bo->bo_tim_len); 3175 3176 clrbit(bo->bo_flags, IEEE80211_BEACON_TIM); 3177 3178 IEEE80211_DPRINTF(vap, IEEE80211_MSG_POWER, 3179 "%s: TIM updated, pending %u, off %u, len %u\n", 3180 __func__, vap->iv_ps_pending, timoff, timlen); 3181 } 3182 /* count down DTIM period */ 3183 if (tie->tim_count == 0) 3184 tie->tim_count = tie->tim_period - 1; 3185 else 3186 tie->tim_count--; 3187 /* update state for buffered multicast frames on DTIM */ 3188 if (mcast && tie->tim_count == 0) 3189 tie->tim_bitctl |= 1; 3190 else 3191 tie->tim_bitctl &= ~1; 3192 if (isset(bo->bo_flags, IEEE80211_BEACON_CSA)) { 3193 struct ieee80211_csa_ie *csa = 3194 (struct ieee80211_csa_ie *) bo->bo_csa; 3195 3196 /* 3197 * Insert or update CSA ie. If we're just starting 3198 * to count down to the channel switch then we need 3199 * to insert the CSA ie. Otherwise we just need to 3200 * drop the count. The actual change happens above 3201 * when the vap's count reaches the target count. 3202 */ 3203 if (vap->iv_csa_count == 0) { 3204 memmove(&csa[1], csa, bo->bo_csa_trailer_len); 3205 bo->bo_erp += sizeof(*csa); 3206 bo->bo_htinfo += sizeof(*csa); 3207 bo->bo_wme += sizeof(*csa); 3208 #ifdef IEEE80211_SUPPORT_SUPERG 3209 bo->bo_ath += sizeof(*csa); 3210 #endif 3211 #ifdef IEEE80211_SUPPORT_TDMA 3212 bo->bo_tdma += sizeof(*csa); 3213 #endif 3214 #ifdef IEEE80211_SUPPORT_MESH 3215 bo->bo_meshconf += sizeof(*csa); 3216 #endif 3217 bo->bo_appie += sizeof(*csa); 3218 bo->bo_csa_trailer_len += sizeof(*csa); 3219 bo->bo_quiet += sizeof(*csa); 3220 bo->bo_tim_trailer_len += sizeof(*csa); 3221 m->m_len += sizeof(*csa); 3222 m->m_pkthdr.len += sizeof(*csa); 3223 3224 ieee80211_add_csa(bo->bo_csa, vap); 3225 } else 3226 csa->csa_count--; 3227 vap->iv_csa_count++; 3228 /* NB: don't clear IEEE80211_BEACON_CSA */ 3229 } 3230 if (IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) && 3231 (vap->iv_flags_ext & IEEE80211_FEXT_DFS) ){ 3232 if (vap->iv_quiet) 3233 ieee80211_add_quiet(bo->bo_quiet, vap); 3234 } 3235 if (isset(bo->bo_flags, IEEE80211_BEACON_ERP)) { 3236 /* 3237 * ERP element needs updating. 3238 */ 3239 (void) ieee80211_add_erp(bo->bo_erp, ic); 3240 clrbit(bo->bo_flags, IEEE80211_BEACON_ERP); 3241 } 3242 #ifdef IEEE80211_SUPPORT_SUPERG 3243 if (isset(bo->bo_flags, IEEE80211_BEACON_ATH)) { 3244 ieee80211_add_athcaps(bo->bo_ath, ni); 3245 clrbit(bo->bo_flags, IEEE80211_BEACON_ATH); 3246 } 3247 #endif 3248 } 3249 if (isset(bo->bo_flags, IEEE80211_BEACON_APPIE)) { 3250 const struct ieee80211_appie *aie = vap->iv_appie_beacon; 3251 int aielen; 3252 uint8_t *frm; 3253 3254 aielen = 0; 3255 if (aie != NULL) 3256 aielen += aie->ie_len; 3257 if (aielen != bo->bo_appie_len) { 3258 /* copy up/down trailer */ 3259 int adjust = aielen - bo->bo_appie_len; 3260 ovbcopy(bo->bo_tim_trailer, bo->bo_tim_trailer+adjust, 3261 bo->bo_tim_trailer_len); 3262 bo->bo_tim_trailer += adjust; 3263 bo->bo_appie += adjust; 3264 bo->bo_appie_len = aielen; 3265 3266 len_changed = 1; 3267 } 3268 frm = bo->bo_appie; 3269 if (aie != NULL) 3270 frm = add_appie(frm, aie); 3271 clrbit(bo->bo_flags, IEEE80211_BEACON_APPIE); 3272 } 3273 IEEE80211_UNLOCK(ic); 3274 3275 return len_changed; 3276 } 3277