ieee80211_output.c revision 1.63.2.2
1 /* $NetBSD: ieee80211_output.c,v 1.63.2.2 2018/07/12 16:35:34 phil Exp $ */ 2 3 /*- 4 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 5 * 6 * Copyright (c) 2001 Atsushi Onoe 7 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include <sys/cdefs.h> 32 #if __FreeBSD__ 33 __FBSDID("$FreeBSD$"); 34 #endif 35 36 #include "opt_inet.h" 37 #include "opt_inet6.h" 38 #include "opt_wlan.h" 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/kernel.h> 43 #include <sys/malloc.h> 44 #include <sys/mbuf.h> 45 #include <sys/endian.h> 46 47 #include <sys/socket.h> 48 49 #include <net/bpf.h> 50 #if __FreeBSD__ 51 #include <net/ethernet.h> 52 #endif 53 #include <net/if.h> 54 #if __FreeBSD__ 55 #include <net/if_var.h> 56 #endif 57 #include <net/if_llc.h> 58 #include <net/if_media.h> 59 #if __FreeBSD__ 60 #include <net/if_vlan_var.h> 61 #endif 62 #ifdef __NetBSD__ 63 #include <net/if_ether.h> 64 #include <net/route.h> 65 #endif 66 67 #include <net80211/ieee80211_var.h> 68 #include <net80211/ieee80211_regdomain.h> 69 #ifdef IEEE80211_SUPPORT_SUPERG 70 #include <net80211/ieee80211_superg.h> 71 #endif 72 #ifdef IEEE80211_SUPPORT_TDMA 73 #include <net80211/ieee80211_tdma.h> 74 #endif 75 #include <net80211/ieee80211_wds.h> 76 #include <net80211/ieee80211_mesh.h> 77 #include <net80211/ieee80211_vht.h> 78 79 #if defined(INET) || defined(INET6) 80 #include <netinet/in.h> 81 #endif 82 83 #ifdef INET 84 #if __FreeBSD__ 85 #include <netinet/if_ether.h> 86 #endif 87 #include <netinet/in_systm.h> 88 #include <netinet/ip.h> 89 #endif 90 #ifdef INET6 91 #include <netinet/ip6.h> 92 #endif 93 94 #if __FreeBSD__ 95 #include <security/mac/mac_framework.h> 96 #endif 97 98 #ifdef __NetBSD__ 99 #undef KASSERT 100 #define KASSERT(__cond, __complaint) FBSDKASSERT(__cond, __complaint) 101 #endif 102 103 #define ETHER_HEADER_COPY(dst, src) \ 104 memcpy(dst, src, sizeof(struct ether_header)) 105 106 static int ieee80211_fragment(struct ieee80211vap *, struct mbuf *, 107 u_int hdrsize, u_int ciphdrsize, u_int mtu); 108 static void ieee80211_tx_mgt_cb(struct ieee80211_node *, void *, int); 109 110 #ifdef IEEE80211_DEBUG 111 /* 112 * Decide if an outbound management frame should be 113 * printed when debugging is enabled. This filters some 114 * of the less interesting frames that come frequently 115 * (e.g. beacons). 116 */ 117 static __inline int 118 doprint(struct ieee80211vap *vap, int subtype) 119 { 120 switch (subtype) { 121 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 122 return (vap->iv_opmode == IEEE80211_M_IBSS); 123 } 124 return 1; 125 } 126 #endif 127 128 /* 129 * Transmit a frame to the given destination on the given VAP. 130 * 131 * It's up to the caller to figure out the details of who this 132 * is going to and resolving the node. 133 * 134 * This routine takes care of queuing it for power save, 135 * A-MPDU state stuff, fast-frames state stuff, encapsulation 136 * if required, then passing it up to the driver layer. 137 * 138 * This routine (for now) consumes the mbuf and frees the node 139 * reference; it ideally will return a TX status which reflects 140 * whether the mbuf was consumed or not, so the caller can 141 * free the mbuf (if appropriate) and the node reference (again, 142 * if appropriate.) 143 */ 144 int 145 ieee80211_vap_pkt_send_dest(struct ieee80211vap *vap, struct mbuf *m, 146 struct ieee80211_node *ni) 147 { 148 struct ieee80211com *ic = vap->iv_ic; 149 struct ifnet *ifp = vap->iv_ifp; 150 int mcast; 151 152 if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) && 153 (m->m_flags & M_PWR_SAV) == 0) { 154 /* 155 * Station in power save mode; pass the frame 156 * to the 802.11 layer and continue. We'll get 157 * the frame back when the time is right. 158 * XXX lose WDS vap linkage? 159 */ 160 if (ieee80211_pwrsave(ni, m) != 0) 161 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 162 ieee80211_free_node(ni); 163 164 /* 165 * We queued it fine, so tell the upper layer 166 * that we consumed it. 167 */ 168 return (0); 169 } 170 /* calculate priority so drivers can find the tx queue */ 171 if (ieee80211_classify(ni, m)) { 172 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_OUTPUT, 173 ni->ni_macaddr, NULL, 174 "%s", "classification failure"); 175 vap->iv_stats.is_tx_classify++; 176 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 177 m_freem(m); 178 ieee80211_free_node(ni); 179 180 /* XXX better status? */ 181 return (0); 182 } 183 /* 184 * Stash the node pointer. Note that we do this after 185 * any call to ieee80211_dwds_mcast because that code 186 * uses any existing value for rcvif to identify the 187 * interface it (might have been) received on. 188 */ 189 #if __FreeBSD__ 190 m->m_pkthdr.rcvif = (void *)ni; 191 #elif __NetBSD__ 192 m_set_rcvif(m, (void *)ni); 193 #endif 194 mcast = (m->m_flags & (M_MCAST | M_BCAST)) ? 1: 0; 195 196 BPF_MTAP(ifp, m); /* 802.3 tx */ 197 198 /* 199 * Check if A-MPDU tx aggregation is setup or if we 200 * should try to enable it. The sta must be associated 201 * with HT and A-MPDU enabled for use. When the policy 202 * routine decides we should enable A-MPDU we issue an 203 * ADDBA request and wait for a reply. The frame being 204 * encapsulated will go out w/o using A-MPDU, or possibly 205 * it might be collected by the driver and held/retransmit. 206 * The default ic_ampdu_enable routine handles staggering 207 * ADDBA requests in case the receiver NAK's us or we are 208 * otherwise unable to establish a BA stream. 209 * 210 * Don't treat group-addressed frames as candidates for aggregation; 211 * net80211 doesn't support 802.11aa-2012 and so group addressed 212 * frames will always have sequence numbers allocated from the NON_QOS 213 * TID. 214 */ 215 if ((ni->ni_flags & IEEE80211_NODE_AMPDU_TX) && 216 (vap->iv_flags_ht & IEEE80211_FHT_AMPDU_TX)) { 217 if ((m->m_flags & M_EAPOL) == 0 && (! mcast)) { 218 int tid = WME_AC_TO_TID(M_WME_GETAC(m)); 219 struct ieee80211_tx_ampdu *tap = &ni->ni_tx_ampdu[tid]; 220 221 ieee80211_txampdu_count_packet(tap); 222 if (IEEE80211_AMPDU_RUNNING(tap)) { 223 /* 224 * Operational, mark frame for aggregation. 225 * 226 * XXX do tx aggregation here 227 */ 228 m->m_flags |= M_AMPDU_MPDU; 229 } else if (!IEEE80211_AMPDU_REQUESTED(tap) && 230 ic->ic_ampdu_enable(ni, tap)) { 231 /* 232 * Not negotiated yet, request service. 233 */ 234 ieee80211_ampdu_request(ni, tap); 235 /* XXX hold frame for reply? */ 236 } 237 } 238 } 239 240 #ifdef IEEE80211_SUPPORT_SUPERG 241 /* 242 * Check for AMSDU/FF; queue for aggregation 243 * 244 * Note: we don't bother trying to do fast frames or 245 * A-MSDU encapsulation for 802.3 drivers. Now, we 246 * likely could do it for FF (because it's a magic 247 * atheros tunnel LLC type) but I don't think we're going 248 * to really need to. For A-MSDU we'd have to set the 249 * A-MSDU QoS bit in the wifi header, so we just plain 250 * can't do it. 251 * 252 * Strictly speaking, we could actually /do/ A-MSDU / FF 253 * with A-MPDU together which for certain circumstances 254 * is beneficial (eg A-MSDU of TCK ACKs.) However, 255 * I'll ignore that for now so existing behaviour is maintained. 256 * Later on it would be good to make "amsdu + ampdu" configurable. 257 */ 258 else if (__predict_true((vap->iv_caps & IEEE80211_C_8023ENCAP) == 0)) { 259 if ((! mcast) && ieee80211_amsdu_tx_ok(ni)) { 260 m = ieee80211_amsdu_check(ni, m); 261 if (m == NULL) { 262 /* NB: any ni ref held on stageq */ 263 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG, 264 "%s: amsdu_check queued frame\n", 265 __func__); 266 return (0); 267 } 268 } else if ((! mcast) && IEEE80211_ATH_CAP(vap, ni, 269 IEEE80211_NODE_FF)) { 270 m = ieee80211_ff_check(ni, m); 271 if (m == NULL) { 272 /* NB: any ni ref held on stageq */ 273 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG, 274 "%s: ff_check queued frame\n", 275 __func__); 276 return (0); 277 } 278 } 279 } 280 #endif /* IEEE80211_SUPPORT_SUPERG */ 281 282 /* 283 * Grab the TX lock - serialise the TX process from this 284 * point (where TX state is being checked/modified) 285 * through to driver queue. 286 */ 287 IEEE80211_TX_LOCK(ic); 288 289 /* 290 * XXX make the encap and transmit code a separate function 291 * so things like the FF (and later A-MSDU) path can just call 292 * it for flushed frames. 293 */ 294 if (__predict_true((vap->iv_caps & IEEE80211_C_8023ENCAP) == 0)) { 295 /* 296 * Encapsulate the packet in prep for transmission. 297 */ 298 m = ieee80211_encap(vap, ni, m); 299 if (m == NULL) { 300 /* NB: stat+msg handled in ieee80211_encap */ 301 IEEE80211_TX_UNLOCK(ic); 302 ieee80211_free_node(ni); 303 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 304 return (ENOBUFS); 305 } 306 } 307 (void) ieee80211_parent_xmitpkt(ic, m); 308 309 /* 310 * Unlock at this point - no need to hold it across 311 * ieee80211_free_node() (ie, the comlock) 312 */ 313 IEEE80211_TX_UNLOCK(ic); 314 ic->ic_lastdata = ticks; 315 316 return (0); 317 } 318 319 320 321 /* 322 * Send the given mbuf through the given vap. 323 * 324 * This consumes the mbuf regardless of whether the transmit 325 * was successful or not. 326 * 327 * This does none of the initial checks that ieee80211_start() 328 * does (eg CAC timeout, interface wakeup) - the caller must 329 * do this first. 330 */ 331 static int 332 ieee80211_start_pkt(struct ieee80211vap *vap, struct mbuf *m) 333 { 334 #define IS_DWDS(vap) \ 335 (vap->iv_opmode == IEEE80211_M_WDS && \ 336 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) == 0) 337 struct ieee80211com *ic = vap->iv_ic; 338 struct ifnet *ifp = vap->iv_ifp; 339 struct ieee80211_node *ni; 340 struct ether_header *eh; 341 342 /* 343 * Cancel any background scan. 344 */ 345 if (ic->ic_flags & IEEE80211_F_SCAN) 346 ieee80211_cancel_anyscan(vap); 347 /* 348 * Find the node for the destination so we can do 349 * things like power save and fast frames aggregation. 350 * 351 * NB: past this point various code assumes the first 352 * mbuf has the 802.3 header present (and contiguous). 353 */ 354 ni = NULL; 355 if (m->m_len < sizeof(struct ether_header) && 356 (m = m_pullup(m, sizeof(struct ether_header))) == NULL) { 357 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 358 "discard frame, %s\n", "m_pullup failed"); 359 vap->iv_stats.is_tx_nobuf++; /* XXX */ 360 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 361 return (ENOBUFS); 362 } 363 eh = mtod(m, struct ether_header *); 364 if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 365 if (IS_DWDS(vap)) { 366 /* 367 * Only unicast frames from the above go out 368 * DWDS vaps; multicast frames are handled by 369 * dispatching the frame as it comes through 370 * the AP vap (see below). 371 */ 372 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_WDS, 373 eh->ether_dhost, "mcast", "%s", "on DWDS"); 374 vap->iv_stats.is_dwds_mcast++; 375 m_freem(m); 376 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 377 /* XXX better status? */ 378 return (ENOBUFS); 379 } 380 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 381 /* 382 * Spam DWDS vap's w/ multicast traffic. 383 */ 384 /* XXX only if dwds in use? */ 385 ieee80211_dwds_mcast(vap, m); 386 } 387 } 388 #ifdef IEEE80211_SUPPORT_MESH 389 if (vap->iv_opmode != IEEE80211_M_MBSS) { 390 #endif 391 ni = ieee80211_find_txnode(vap, eh->ether_dhost); 392 if (ni == NULL) { 393 /* NB: ieee80211_find_txnode does stat+msg */ 394 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 395 m_freem(m); 396 /* XXX better status? */ 397 return (ENOBUFS); 398 } 399 if (ni->ni_associd == 0 && 400 (ni->ni_flags & IEEE80211_NODE_ASSOCID)) { 401 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_OUTPUT, 402 eh->ether_dhost, NULL, 403 "sta not associated (type 0x%04x)", 404 htons(eh->ether_type)); 405 vap->iv_stats.is_tx_notassoc++; 406 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 407 m_freem(m); 408 ieee80211_free_node(ni); 409 /* XXX better status? */ 410 return (ENOBUFS); 411 } 412 #ifdef IEEE80211_SUPPORT_MESH 413 } else { 414 if (!IEEE80211_ADDR_EQ(eh->ether_shost, vap->iv_myaddr)) { 415 /* 416 * Proxy station only if configured. 417 */ 418 if (!ieee80211_mesh_isproxyena(vap)) { 419 IEEE80211_DISCARD_MAC(vap, 420 IEEE80211_MSG_OUTPUT | 421 IEEE80211_MSG_MESH, 422 eh->ether_dhost, NULL, 423 "%s", "proxy not enabled"); 424 vap->iv_stats.is_mesh_notproxy++; 425 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 426 m_freem(m); 427 /* XXX better status? */ 428 return (ENOBUFS); 429 } 430 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 431 "forward frame from DS SA(%6D), DA(%6D)\n", 432 eh->ether_shost, ":", 433 eh->ether_dhost, ":"); 434 ieee80211_mesh_proxy_check(vap, eh->ether_shost); 435 } 436 ni = ieee80211_mesh_discover(vap, eh->ether_dhost, m); 437 if (ni == NULL) { 438 /* 439 * NB: ieee80211_mesh_discover holds/disposes 440 * frame (e.g. queueing on path discovery). 441 */ 442 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 443 /* XXX better status? */ 444 return (ENOBUFS); 445 } 446 } 447 #endif 448 449 /* 450 * We've resolved the sender, so attempt to transmit it. 451 */ 452 453 if (vap->iv_state == IEEE80211_S_SLEEP) { 454 /* 455 * In power save; queue frame and then wakeup device 456 * for transmit. 457 */ 458 ic->ic_lastdata = ticks; 459 if (ieee80211_pwrsave(ni, m) != 0) 460 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 461 ieee80211_free_node(ni); 462 ieee80211_new_state(vap, IEEE80211_S_RUN, 0); 463 return (0); 464 } 465 466 if (ieee80211_vap_pkt_send_dest(vap, m, ni) != 0) 467 return (ENOBUFS); 468 return (0); 469 #undef IS_DWDS 470 } 471 472 /* 473 * Start method for vap's. All packets from the stack come 474 * through here. We handle common processing of the packets 475 * before dispatching them to the underlying device. 476 * 477 * if_transmit() requires that the mbuf be consumed by this call 478 * regardless of the return condition. 479 */ 480 int 481 ieee80211_vap_transmit(struct ifnet *ifp, struct mbuf *m) 482 { 483 struct ieee80211vap *vap = ifp->if_softc; 484 struct ieee80211com *ic = vap->iv_ic; 485 486 /* 487 * No data frames go out unless we're running. 488 * Note in particular this covers CAC and CSA 489 * states (though maybe we should check muting 490 * for CSA). 491 */ 492 if (vap->iv_state != IEEE80211_S_RUN && 493 vap->iv_state != IEEE80211_S_SLEEP) { 494 IEEE80211_LOCK(ic); 495 /* re-check under the com lock to avoid races */ 496 if (vap->iv_state != IEEE80211_S_RUN && 497 vap->iv_state != IEEE80211_S_SLEEP) { 498 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 499 "%s: ignore queue, in %s state\n", 500 __func__, ieee80211_state_name[vap->iv_state]); 501 vap->iv_stats.is_tx_badstate++; 502 IEEE80211_UNLOCK(ic); 503 #if __FreeBSD__ 504 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 505 #elif __NetBSD__ 506 ifp->if_flags |= IFF_OACTIVE; 507 #endif 508 m_freem(m); 509 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 510 return (ENETDOWN); 511 } 512 IEEE80211_UNLOCK(ic); 513 } 514 515 /* 516 * Sanitize mbuf flags for net80211 use. We cannot 517 * clear M_PWR_SAV or M_MORE_DATA because these may 518 * be set for frames that are re-submitted from the 519 * power save queue. 520 * 521 * NB: This must be done before ieee80211_classify as 522 * it marks EAPOL in frames with M_EAPOL. 523 */ 524 m->m_flags &= ~(M_80211_TX - M_PWR_SAV - M_MORE_DATA); 525 526 /* 527 * Bump to the packet transmission path. 528 * The mbuf will be consumed here. 529 */ 530 return (ieee80211_start_pkt(vap, m)); 531 } 532 533 void 534 ieee80211_vap_qflush(struct ifnet *ifp) 535 { 536 537 /* Empty for now */ 538 } 539 540 /* 541 * 802.11 raw output routine. 542 * 543 * XXX TODO: this (and other send routines) should correctly 544 * XXX keep the pwr mgmt bit set if it decides to call into the 545 * XXX driver to send a frame whilst the state is SLEEP. 546 * 547 * Otherwise the peer may decide that we're awake and flood us 548 * with traffic we are still too asleep to receive! 549 */ 550 int 551 ieee80211_raw_output(struct ieee80211vap *vap, struct ieee80211_node *ni, 552 struct mbuf *m, const struct ieee80211_bpf_params *params) 553 { 554 struct ieee80211com *ic = vap->iv_ic; 555 int error; 556 557 /* 558 * Set node - the caller has taken a reference, so ensure 559 * that the mbuf has the same node value that 560 * it would if it were going via the normal path. 561 */ 562 #if __FreeBSD__ 563 m->m_pkthdr.rcvif = (void *)ni; 564 #elif __NetBSD__ 565 m_set_rcvif(m, (void*)ni); 566 #endif 567 568 /* 569 * Attempt to add bpf transmit parameters. 570 * 571 * For now it's ok to fail; the raw_xmit api still takes 572 * them as an option. 573 * 574 * Later on when ic_raw_xmit() has params removed, 575 * they'll have to be added - so fail the transmit if 576 * they can't be. 577 */ 578 if (params) 579 (void) ieee80211_add_xmit_params(m, params); 580 581 error = ic->ic_raw_xmit(ni, m, params); 582 if (error) { 583 if_inc_counter(vap->iv_ifp, IFCOUNTER_OERRORS, 1); 584 ieee80211_free_node(ni); 585 } 586 return (error); 587 } 588 589 static int 590 ieee80211_validate_frame(struct mbuf *m, 591 const struct ieee80211_bpf_params *params) 592 { 593 struct ieee80211_frame *wh; 594 int type; 595 596 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_ack)) 597 return (EINVAL); 598 599 wh = mtod(m, struct ieee80211_frame *); 600 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 601 IEEE80211_FC0_VERSION_0) 602 return (EINVAL); 603 604 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 605 if (type != IEEE80211_FC0_TYPE_DATA) { 606 if ((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) != 607 IEEE80211_FC1_DIR_NODS) 608 return (EINVAL); 609 610 if (type != IEEE80211_FC0_TYPE_MGT && 611 (wh->i_fc[1] & IEEE80211_FC1_MORE_FRAG) != 0) 612 return (EINVAL); 613 614 /* XXX skip other field checks? */ 615 } 616 617 if ((params && (params->ibp_flags & IEEE80211_BPF_CRYPTO) != 0) || 618 (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) != 0) { 619 int subtype; 620 621 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 622 623 /* 624 * See IEEE Std 802.11-2012, 625 * 8.2.4.1.9 'Protected Frame field' 626 */ 627 /* XXX no support for robust management frames yet. */ 628 if (!(type == IEEE80211_FC0_TYPE_DATA || 629 (type == IEEE80211_FC0_TYPE_MGT && 630 subtype == IEEE80211_FC0_SUBTYPE_AUTH))) 631 return (EINVAL); 632 633 wh->i_fc[1] |= IEEE80211_FC1_PROTECTED; 634 } 635 636 if (m->m_pkthdr.len < ieee80211_anyhdrsize(wh)) 637 return (EINVAL); 638 639 return (0); 640 } 641 642 /* 643 * 802.11 output routine. This is (currently) used only to 644 * connect bpf write calls to the 802.11 layer for injecting 645 * raw 802.11 frames. 646 */ 647 int 648 ieee80211_output(struct ifnet *ifp, struct mbuf *m, 649 const struct sockaddr *dst, struct route *ro) 650 { 651 #define senderr(e) do { error = (e); goto bad;} while (0) 652 const struct ieee80211_bpf_params *params = NULL; 653 struct ieee80211_node *ni = NULL; 654 struct ieee80211vap *vap; 655 struct ieee80211_frame *wh; 656 struct ieee80211com *ic = NULL; 657 int error; 658 int ret; 659 660 #if __FreeBSD__ 661 if (ifp->if_drv_flags & IFF_DRV_OACTIVE) { 662 #elif __NetBSD__ 663 if (ifp->if_flags & IFF_OACTIVE) { 664 #endif 665 /* 666 * Short-circuit requests if the vap is marked OACTIVE 667 * as this can happen because a packet came down through 668 * ieee80211_start before the vap entered RUN state in 669 * which case it's ok to just drop the frame. This 670 * should not be necessary but callers of if_output don't 671 * check OACTIVE. 672 */ 673 senderr(ENETDOWN); 674 } 675 vap = ifp->if_softc; 676 ic = vap->iv_ic; 677 /* 678 * Hand to the 802.3 code if not tagged as 679 * a raw 802.11 frame. 680 */ 681 if (dst->sa_family != AF_IEEE80211) 682 return vap->iv_output(ifp, m, dst, ro); 683 #ifdef MAC 684 error = mac_ifnet_check_transmit(ifp, m); 685 if (error) 686 senderr(error); 687 #endif 688 #if __FreeBSD__ 689 if (ifp->if_flags & IFF_MONITOR) 690 senderr(ENETDOWN); 691 #endif 692 if (!IFNET_IS_UP_RUNNING(ifp)) 693 senderr(ENETDOWN); 694 if (vap->iv_state == IEEE80211_S_CAC) { 695 IEEE80211_DPRINTF(vap, 696 IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH, 697 "block %s frame in CAC state\n", "raw data"); 698 vap->iv_stats.is_tx_badstate++; 699 senderr(EIO); /* XXX */ 700 } else if (vap->iv_state == IEEE80211_S_SCAN) 701 senderr(EIO); 702 /* XXX bypass bridge, pfil, carp, etc. */ 703 704 /* 705 * NB: DLT_IEEE802_11_RADIO identifies the parameters are 706 * present by setting the sa_len field of the sockaddr (yes, 707 * this is a hack). 708 * NB: we assume sa_data is suitably aligned to cast. 709 */ 710 if (dst->sa_len != 0) 711 params = (const struct ieee80211_bpf_params *)dst->sa_data; 712 713 error = ieee80211_validate_frame(m, params); 714 if (error != 0) 715 senderr(error); 716 717 wh = mtod(m, struct ieee80211_frame *); 718 719 /* locate destination node */ 720 switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) { 721 case IEEE80211_FC1_DIR_NODS: 722 case IEEE80211_FC1_DIR_FROMDS: 723 ni = ieee80211_find_txnode(vap, wh->i_addr1); 724 break; 725 case IEEE80211_FC1_DIR_TODS: 726 case IEEE80211_FC1_DIR_DSTODS: 727 ni = ieee80211_find_txnode(vap, wh->i_addr3); 728 break; 729 default: 730 senderr(EDOOFUS); 731 } 732 if (ni == NULL) { 733 /* 734 * Permit packets w/ bpf params through regardless 735 * (see below about sa_len). 736 */ 737 if (dst->sa_len == 0) 738 senderr(EHOSTUNREACH); 739 ni = ieee80211_ref_node(vap->iv_bss); 740 } 741 742 /* 743 * Sanitize mbuf for net80211 flags leaked from above. 744 * 745 * NB: This must be done before ieee80211_classify as 746 * it marks EAPOL in frames with M_EAPOL. 747 */ 748 m->m_flags &= ~M_80211_TX; 749 m->m_flags |= M_ENCAP; /* mark encapsulated */ 750 751 if (IEEE80211_IS_DATA(wh)) { 752 /* calculate priority so drivers can find the tx queue */ 753 if (ieee80211_classify(ni, m)) 754 senderr(EIO); /* XXX */ 755 756 /* NB: ieee80211_encap does not include 802.11 header */ 757 IEEE80211_NODE_STAT_ADD(ni, tx_bytes, 758 m->m_pkthdr.len - ieee80211_hdrsize(wh)); 759 } else 760 M_WME_SETAC(m, WME_AC_BE); 761 762 IEEE80211_NODE_STAT(ni, tx_data); 763 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 764 IEEE80211_NODE_STAT(ni, tx_mcast); 765 m->m_flags |= M_MCAST; 766 } else 767 IEEE80211_NODE_STAT(ni, tx_ucast); 768 769 IEEE80211_TX_LOCK(ic); 770 ret = ieee80211_raw_output(vap, ni, m, params); 771 IEEE80211_TX_UNLOCK(ic); 772 return (ret); 773 bad: 774 if (m != NULL) 775 m_freem(m); 776 if (ni != NULL) 777 ieee80211_free_node(ni); 778 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 779 return error; 780 #undef senderr 781 } 782 783 /* 784 * Set the direction field and address fields of an outgoing 785 * frame. Note this should be called early on in constructing 786 * a frame as it sets i_fc[1]; other bits can then be or'd in. 787 */ 788 void 789 ieee80211_send_setup( 790 struct ieee80211_node *ni, 791 struct mbuf *m, 792 int type, int tid, 793 const uint8_t sa[IEEE80211_ADDR_LEN], 794 const uint8_t da[IEEE80211_ADDR_LEN], 795 const uint8_t bssid[IEEE80211_ADDR_LEN]) 796 { 797 #define WH4(wh) ((struct ieee80211_frame_addr4 *)wh) 798 struct ieee80211vap *vap = ni->ni_vap; 799 struct ieee80211_tx_ampdu *tap; 800 struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *); 801 ieee80211_seq seqno; 802 803 IEEE80211_TX_LOCK_ASSERT(ni->ni_ic); 804 805 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | type; 806 if ((type & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_DATA) { 807 switch (vap->iv_opmode) { 808 case IEEE80211_M_STA: 809 wh->i_fc[1] = IEEE80211_FC1_DIR_TODS; 810 IEEE80211_ADDR_COPY(wh->i_addr1, bssid); 811 IEEE80211_ADDR_COPY(wh->i_addr2, sa); 812 IEEE80211_ADDR_COPY(wh->i_addr3, da); 813 break; 814 case IEEE80211_M_IBSS: 815 case IEEE80211_M_AHDEMO: 816 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 817 IEEE80211_ADDR_COPY(wh->i_addr1, da); 818 IEEE80211_ADDR_COPY(wh->i_addr2, sa); 819 IEEE80211_ADDR_COPY(wh->i_addr3, bssid); 820 break; 821 case IEEE80211_M_HOSTAP: 822 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS; 823 IEEE80211_ADDR_COPY(wh->i_addr1, da); 824 IEEE80211_ADDR_COPY(wh->i_addr2, bssid); 825 IEEE80211_ADDR_COPY(wh->i_addr3, sa); 826 break; 827 case IEEE80211_M_WDS: 828 wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS; 829 IEEE80211_ADDR_COPY(wh->i_addr1, da); 830 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); 831 IEEE80211_ADDR_COPY(wh->i_addr3, da); 832 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, sa); 833 break; 834 case IEEE80211_M_MBSS: 835 #ifdef IEEE80211_SUPPORT_MESH 836 if (IEEE80211_IS_MULTICAST(da)) { 837 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS; 838 /* XXX next hop */ 839 IEEE80211_ADDR_COPY(wh->i_addr1, da); 840 IEEE80211_ADDR_COPY(wh->i_addr2, 841 vap->iv_myaddr); 842 } else { 843 wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS; 844 IEEE80211_ADDR_COPY(wh->i_addr1, da); 845 IEEE80211_ADDR_COPY(wh->i_addr2, 846 vap->iv_myaddr); 847 IEEE80211_ADDR_COPY(wh->i_addr3, da); 848 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, sa); 849 } 850 #endif 851 break; 852 case IEEE80211_M_MONITOR: /* NB: to quiet compiler */ 853 break; 854 } 855 } else { 856 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 857 IEEE80211_ADDR_COPY(wh->i_addr1, da); 858 IEEE80211_ADDR_COPY(wh->i_addr2, sa); 859 #ifdef IEEE80211_SUPPORT_MESH 860 if (vap->iv_opmode == IEEE80211_M_MBSS) 861 IEEE80211_ADDR_COPY(wh->i_addr3, sa); 862 else 863 #endif 864 IEEE80211_ADDR_COPY(wh->i_addr3, bssid); 865 } 866 *(uint16_t *)&wh->i_dur[0] = 0; 867 868 /* 869 * XXX TODO: this is what the TX lock is for. 870 * Here we're incrementing sequence numbers, and they 871 * need to be in lock-step with what the driver is doing 872 * both in TX ordering and crypto encap (IV increment.) 873 * 874 * If the driver does seqno itself, then we can skip 875 * assigning sequence numbers here, and we can avoid 876 * requiring the TX lock. 877 */ 878 tap = &ni->ni_tx_ampdu[tid]; 879 if (tid != IEEE80211_NONQOS_TID && IEEE80211_AMPDU_RUNNING(tap)) { 880 m->m_flags |= M_AMPDU_MPDU; 881 882 /* NB: zero out i_seq field (for s/w encryption etc) */ 883 *(uint16_t *)&wh->i_seq[0] = 0; 884 } else { 885 if (IEEE80211_HAS_SEQ(type & IEEE80211_FC0_TYPE_MASK, 886 type & IEEE80211_FC0_SUBTYPE_MASK)) 887 /* 888 * 802.11-2012 9.3.2.10 - QoS multicast frames 889 * come out of a different seqno space. 890 */ 891 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 892 seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]++; 893 } else { 894 seqno = ni->ni_txseqs[tid]++; 895 } 896 else 897 seqno = 0; 898 899 *(uint16_t *)&wh->i_seq[0] = 900 htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); 901 M_SEQNO_SET(m, seqno); 902 } 903 904 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) 905 m->m_flags |= M_MCAST; 906 #undef WH4 907 } 908 909 /* 910 * Send a management frame to the specified node. The node pointer 911 * must have a reference as the pointer will be passed to the driver 912 * and potentially held for a long time. If the frame is successfully 913 * dispatched to the driver, then it is responsible for freeing the 914 * reference (and potentially free'ing up any associated storage); 915 * otherwise deal with reclaiming any reference (on error). 916 */ 917 int 918 ieee80211_mgmt_output(struct ieee80211_node *ni, struct mbuf *m, int type, 919 struct ieee80211_bpf_params *params) 920 { 921 struct ieee80211vap *vap = ni->ni_vap; 922 struct ieee80211com *ic = ni->ni_ic; 923 struct ieee80211_frame *wh; 924 int ret; 925 926 KASSERT(ni != NULL, ("null node")); 927 928 if (vap->iv_state == IEEE80211_S_CAC) { 929 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH, 930 ni, "block %s frame in CAC state", 931 ieee80211_mgt_subtype_name(type)); 932 vap->iv_stats.is_tx_badstate++; 933 ieee80211_free_node(ni); 934 m_freem(m); 935 return EIO; /* XXX */ 936 } 937 938 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); 939 if (m == NULL) { 940 ieee80211_free_node(ni); 941 return ENOMEM; 942 } 943 944 IEEE80211_TX_LOCK(ic); 945 946 wh = mtod(m, struct ieee80211_frame *); 947 ieee80211_send_setup(ni, m, 948 IEEE80211_FC0_TYPE_MGT | type, IEEE80211_NONQOS_TID, 949 vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid); 950 if (params->ibp_flags & IEEE80211_BPF_CRYPTO) { 951 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr1, 952 "encrypting frame (%s)", __func__); 953 wh->i_fc[1] |= IEEE80211_FC1_PROTECTED; 954 } 955 m->m_flags |= M_ENCAP; /* mark encapsulated */ 956 957 KASSERT(type != IEEE80211_FC0_SUBTYPE_PROBE_RESP, ("probe response?")); 958 M_WME_SETAC(m, params->ibp_pri); 959 960 #ifdef IEEE80211_DEBUG 961 /* avoid printing too many frames */ 962 if ((ieee80211_msg_debug(vap) && doprint(vap, type)) || 963 ieee80211_msg_dumppkts(vap)) { 964 printf("[%s] send %s on channel %u\n", 965 ether_sprintf(wh->i_addr1), 966 ieee80211_mgt_subtype_name(type), 967 ieee80211_chan2ieee(ic, ic->ic_curchan)); 968 } 969 #endif 970 IEEE80211_NODE_STAT(ni, tx_mgmt); 971 972 ret = ieee80211_raw_output(vap, ni, m, params); 973 IEEE80211_TX_UNLOCK(ic); 974 return (ret); 975 } 976 977 static void 978 ieee80211_nulldata_transmitted(struct ieee80211_node *ni, void *arg, 979 int status) 980 { 981 struct ieee80211vap *vap = ni->ni_vap; 982 983 wakeup(vap); 984 } 985 986 /* 987 * Send a null data frame to the specified node. If the station 988 * is setup for QoS then a QoS Null Data frame is constructed. 989 * If this is a WDS station then a 4-address frame is constructed. 990 * 991 * NB: the caller is assumed to have setup a node reference 992 * for use; this is necessary to deal with a race condition 993 * when probing for inactive stations. Like ieee80211_mgmt_output 994 * we must cleanup any node reference on error; however we 995 * can safely just unref it as we know it will never be the 996 * last reference to the node. 997 */ 998 int 999 ieee80211_send_nulldata(struct ieee80211_node *ni) 1000 { 1001 struct ieee80211vap *vap = ni->ni_vap; 1002 struct ieee80211com *ic = ni->ni_ic; 1003 struct mbuf *m; 1004 struct ieee80211_frame *wh; 1005 int hdrlen; 1006 uint8_t *frm; 1007 int ret; 1008 1009 if (vap->iv_state == IEEE80211_S_CAC) { 1010 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH, 1011 ni, "block %s frame in CAC state", "null data"); 1012 ieee80211_unref_node(&ni); 1013 vap->iv_stats.is_tx_badstate++; 1014 return EIO; /* XXX */ 1015 } 1016 1017 if (ni->ni_flags & (IEEE80211_NODE_QOS|IEEE80211_NODE_HT)) 1018 hdrlen = sizeof(struct ieee80211_qosframe); 1019 else 1020 hdrlen = sizeof(struct ieee80211_frame); 1021 /* NB: only WDS vap's get 4-address frames */ 1022 if (vap->iv_opmode == IEEE80211_M_WDS) 1023 hdrlen += IEEE80211_ADDR_LEN; 1024 if (ic->ic_flags & IEEE80211_F_DATAPAD) 1025 hdrlen = roundup(hdrlen, sizeof(uint32_t)); 1026 1027 m = ieee80211_getmgtframe(&frm, ic->ic_headroom + hdrlen, 0); 1028 if (m == NULL) { 1029 /* XXX debug msg */ 1030 ieee80211_unref_node(&ni); 1031 vap->iv_stats.is_tx_nobuf++; 1032 return ENOMEM; 1033 } 1034 KASSERT(M_LEADINGSPACE(m) >= hdrlen, 1035 ("leading space %zd", M_LEADINGSPACE(m))); 1036 M_PREPEND(m, hdrlen, M_NOWAIT); 1037 if (m == NULL) { 1038 /* NB: cannot happen */ 1039 ieee80211_free_node(ni); 1040 return ENOMEM; 1041 } 1042 1043 IEEE80211_TX_LOCK(ic); 1044 1045 wh = mtod(m, struct ieee80211_frame *); /* NB: a little lie */ 1046 if (ni->ni_flags & IEEE80211_NODE_QOS) { 1047 const int tid = WME_AC_TO_TID(WME_AC_BE); 1048 uint8_t *qos; 1049 1050 ieee80211_send_setup(ni, m, 1051 IEEE80211_FC0_TYPE_DATA | IEEE80211_FC0_SUBTYPE_QOS_NULL, 1052 tid, vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid); 1053 1054 if (vap->iv_opmode == IEEE80211_M_WDS) 1055 qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos; 1056 else 1057 qos = ((struct ieee80211_qosframe *) wh)->i_qos; 1058 qos[0] = tid & IEEE80211_QOS_TID; 1059 if (ic->ic_wme.wme_wmeChanParams.cap_wmeParams[WME_AC_BE].wmep_noackPolicy) 1060 qos[0] |= IEEE80211_QOS_ACKPOLICY_NOACK; 1061 qos[1] = 0; 1062 } else { 1063 ieee80211_send_setup(ni, m, 1064 IEEE80211_FC0_TYPE_DATA | IEEE80211_FC0_SUBTYPE_NODATA, 1065 IEEE80211_NONQOS_TID, 1066 vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid); 1067 } 1068 if (vap->iv_opmode != IEEE80211_M_WDS) { 1069 /* NB: power management bit is never sent by an AP */ 1070 if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) && 1071 vap->iv_opmode != IEEE80211_M_HOSTAP) 1072 wh->i_fc[1] |= IEEE80211_FC1_PWR_MGT; 1073 } 1074 if ((ic->ic_flags & IEEE80211_F_SCAN) && 1075 (ni->ni_flags & IEEE80211_NODE_PWR_MGT)) { 1076 ieee80211_add_callback(m, ieee80211_nulldata_transmitted, 1077 NULL); 1078 } 1079 m->m_len = m->m_pkthdr.len = hdrlen; 1080 m->m_flags |= M_ENCAP; /* mark encapsulated */ 1081 1082 M_WME_SETAC(m, WME_AC_BE); 1083 1084 IEEE80211_NODE_STAT(ni, tx_data); 1085 1086 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS, ni, 1087 "send %snull data frame on channel %u, pwr mgt %s", 1088 ni->ni_flags & IEEE80211_NODE_QOS ? "QoS " : "", 1089 ieee80211_chan2ieee(ic, ic->ic_curchan), 1090 wh->i_fc[1] & IEEE80211_FC1_PWR_MGT ? "ena" : "dis"); 1091 1092 ret = ieee80211_raw_output(vap, ni, m, NULL); 1093 IEEE80211_TX_UNLOCK(ic); 1094 return (ret); 1095 } 1096 1097 /* 1098 * Assign priority to a frame based on any vlan tag assigned 1099 * to the station and/or any Diffserv setting in an IP header. 1100 * Finally, if an ACM policy is setup (in station mode) it's 1101 * applied. 1102 */ 1103 int 1104 ieee80211_classify(struct ieee80211_node *ni, struct mbuf *m) 1105 { 1106 const struct ether_header *eh = NULL; 1107 uint16_t ether_type; 1108 int v_wme_ac, d_wme_ac, ac; 1109 1110 if (__predict_false(m->m_flags & M_ENCAP)) { 1111 struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *); 1112 struct llc *llc; 1113 int hdrlen, subtype; 1114 1115 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1116 if (subtype & IEEE80211_FC0_SUBTYPE_NODATA) { 1117 ac = WME_AC_BE; 1118 goto done; 1119 } 1120 1121 hdrlen = ieee80211_hdrsize(wh); 1122 if (m->m_pkthdr.len < hdrlen + sizeof(*llc)) 1123 return 1; 1124 1125 llc = (struct llc *)mtodo(m, hdrlen); 1126 if (llc->llc_dsap != LLC_SNAP_LSAP || 1127 llc->llc_ssap != LLC_SNAP_LSAP || 1128 llc->llc_control != LLC_UI || 1129 llc->llc_snap.org_code[0] != 0 || 1130 llc->llc_snap.org_code[1] != 0 || 1131 llc->llc_snap.org_code[2] != 0) 1132 return 1; 1133 1134 ether_type = llc->llc_snap.ether_type; 1135 } else { 1136 eh = mtod(m, struct ether_header *); 1137 ether_type = eh->ether_type; 1138 } 1139 1140 /* 1141 * Always promote PAE/EAPOL frames to high priority. 1142 */ 1143 if (ether_type == htons(ETHERTYPE_PAE)) { 1144 /* NB: mark so others don't need to check header */ 1145 m->m_flags |= M_EAPOL; 1146 ac = WME_AC_VO; 1147 goto done; 1148 } 1149 /* 1150 * Non-qos traffic goes to BE. 1151 */ 1152 if ((ni->ni_flags & IEEE80211_NODE_QOS) == 0) { 1153 ac = WME_AC_BE; 1154 goto done; 1155 } 1156 1157 /* 1158 * If node has a vlan tag then all traffic 1159 * to it must have a matching tag. 1160 */ 1161 v_wme_ac = 0; 1162 if (ni->ni_vlan != 0) { 1163 if ((m->m_flags & M_VLANTAG) == 0) { 1164 IEEE80211_NODE_STAT(ni, tx_novlantag); 1165 return 1; 1166 } 1167 if (EVL_VLANOFTAG(m->m_pkthdr.ether_vtag) != 1168 EVL_VLANOFTAG(ni->ni_vlan)) { 1169 IEEE80211_NODE_STAT(ni, tx_vlanmismatch); 1170 return 1; 1171 } 1172 /* map vlan priority to AC */ 1173 v_wme_ac = TID_TO_WME_AC(EVL_PRIOFTAG(ni->ni_vlan)); 1174 } 1175 1176 /* XXX m_copydata may be too slow for fast path */ 1177 #ifdef INET 1178 if (eh && eh->ether_type == htons(ETHERTYPE_IP)) { 1179 uint8_t tos; 1180 /* 1181 * IP frame, map the DSCP bits from the TOS field. 1182 */ 1183 /* NB: ip header may not be in first mbuf */ 1184 m_copydata(m, sizeof(struct ether_header) + 1185 offsetof(struct ip, ip_tos), sizeof(tos), &tos); 1186 tos >>= 5; /* NB: ECN + low 3 bits of DSCP */ 1187 d_wme_ac = TID_TO_WME_AC(tos); 1188 } else { 1189 #endif /* INET */ 1190 #ifdef INET6 1191 if (eh && eh->ether_type == htons(ETHERTYPE_IPV6)) { 1192 uint32_t flow; 1193 uint8_t tos; 1194 /* 1195 * IPv6 frame, map the DSCP bits from the traffic class field. 1196 */ 1197 m_copydata(m, sizeof(struct ether_header) + 1198 offsetof(struct ip6_hdr, ip6_flow), sizeof(flow), 1199 (caddr_t) &flow); 1200 tos = (uint8_t)(ntohl(flow) >> 20); 1201 tos >>= 5; /* NB: ECN + low 3 bits of DSCP */ 1202 d_wme_ac = TID_TO_WME_AC(tos); 1203 } else { 1204 #endif /* INET6 */ 1205 d_wme_ac = WME_AC_BE; 1206 #ifdef INET6 1207 } 1208 #endif 1209 #ifdef INET 1210 } 1211 #endif 1212 /* 1213 * Use highest priority AC. 1214 */ 1215 if (v_wme_ac > d_wme_ac) 1216 ac = v_wme_ac; 1217 else 1218 ac = d_wme_ac; 1219 1220 /* 1221 * Apply ACM policy. 1222 */ 1223 if (ni->ni_vap->iv_opmode == IEEE80211_M_STA) { 1224 static const int acmap[4] = { 1225 WME_AC_BK, /* WME_AC_BE */ 1226 WME_AC_BK, /* WME_AC_BK */ 1227 WME_AC_BE, /* WME_AC_VI */ 1228 WME_AC_VI, /* WME_AC_VO */ 1229 }; 1230 struct ieee80211com *ic = ni->ni_ic; 1231 1232 while (ac != WME_AC_BK && 1233 ic->ic_wme.wme_wmeBssChanParams.cap_wmeParams[ac].wmep_acm) 1234 ac = acmap[ac]; 1235 } 1236 done: 1237 M_WME_SETAC(m, ac); 1238 return 0; 1239 } 1240 1241 /* 1242 * Insure there is sufficient contiguous space to encapsulate the 1243 * 802.11 data frame. If room isn't already there, arrange for it. 1244 * Drivers and cipher modules assume we have done the necessary work 1245 * and fail rudely if they don't find the space they need. 1246 */ 1247 struct mbuf * 1248 ieee80211_mbuf_adjust(struct ieee80211vap *vap, int hdrsize, 1249 struct ieee80211_key *key, struct mbuf *m) 1250 { 1251 #define TO_BE_RECLAIMED (sizeof(struct ether_header) - sizeof(struct llc)) 1252 int needed_space = vap->iv_ic->ic_headroom + hdrsize; 1253 1254 if (key != NULL) { 1255 /* XXX belongs in crypto code? */ 1256 needed_space += key->wk_cipher->ic_header; 1257 /* XXX frags */ 1258 /* 1259 * When crypto is being done in the host we must insure 1260 * the data are writable for the cipher routines; clone 1261 * a writable mbuf chain. 1262 * XXX handle SWMIC specially 1263 */ 1264 if (key->wk_flags & (IEEE80211_KEY_SWENCRYPT|IEEE80211_KEY_SWENMIC)) { 1265 m = m_unshare(m, M_NOWAIT); 1266 if (m == NULL) { 1267 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 1268 "%s: cannot get writable mbuf\n", __func__); 1269 vap->iv_stats.is_tx_nobuf++; /* XXX new stat */ 1270 return NULL; 1271 } 1272 } 1273 } 1274 /* 1275 * We know we are called just before stripping an Ethernet 1276 * header and prepending an LLC header. This means we know 1277 * there will be 1278 * sizeof(struct ether_header) - sizeof(struct llc) 1279 * bytes recovered to which we need additional space for the 1280 * 802.11 header and any crypto header. 1281 */ 1282 /* XXX check trailing space and copy instead? */ 1283 if (M_LEADINGSPACE(m) < needed_space - TO_BE_RECLAIMED) { 1284 struct mbuf *n = m_gethdr(M_NOWAIT, m->m_type); 1285 if (n == NULL) { 1286 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 1287 "%s: cannot expand storage\n", __func__); 1288 vap->iv_stats.is_tx_nobuf++; 1289 m_freem(m); 1290 return NULL; 1291 } 1292 #if __FreeBSD__ 1293 KASSERT(needed_space <= MHLEN, 1294 ("not enough room, need %u got %d\n", needed_space, MHLEN)); 1295 #elif __NetBSD__ 1296 KASSERT(needed_space <= MHLEN, 1297 ("not enough room, need %u got %lu\n", needed_space, MHLEN)); 1298 #endif 1299 /* 1300 * Setup new mbuf to have leading space to prepend the 1301 * 802.11 header and any crypto header bits that are 1302 * required (the latter are added when the driver calls 1303 * back to ieee80211_crypto_encap to do crypto encapsulation). 1304 */ 1305 /* NB: must be first 'cuz it clobbers m_data */ 1306 m_move_pkthdr(n, m); 1307 n->m_len = 0; /* NB: m_gethdr does not set */ 1308 n->m_data += needed_space; 1309 /* 1310 * Pull up Ethernet header to create the expected layout. 1311 * We could use m_pullup but that's overkill (i.e. we don't 1312 * need the actual data) and it cannot fail so do it inline 1313 * for speed. 1314 */ 1315 /* NB: struct ether_header is known to be contiguous */ 1316 n->m_len += sizeof(struct ether_header); 1317 m->m_len -= sizeof(struct ether_header); 1318 m->m_data += sizeof(struct ether_header); 1319 /* 1320 * Replace the head of the chain. 1321 */ 1322 n->m_next = m; 1323 m = n; 1324 } 1325 return m; 1326 #undef TO_BE_RECLAIMED 1327 } 1328 1329 /* 1330 * Return the transmit key to use in sending a unicast frame. 1331 * If a unicast key is set we use that. When no unicast key is set 1332 * we fall back to the default transmit key. 1333 */ 1334 static __inline struct ieee80211_key * 1335 ieee80211_crypto_getucastkey(struct ieee80211vap *vap, 1336 struct ieee80211_node *ni) 1337 { 1338 if (IEEE80211_KEY_UNDEFINED(&ni->ni_ucastkey)) { 1339 if (vap->iv_def_txkey == IEEE80211_KEYIX_NONE || 1340 IEEE80211_KEY_UNDEFINED(&vap->iv_nw_keys[vap->iv_def_txkey])) 1341 return NULL; 1342 return &vap->iv_nw_keys[vap->iv_def_txkey]; 1343 } else { 1344 return &ni->ni_ucastkey; 1345 } 1346 } 1347 1348 /* 1349 * Return the transmit key to use in sending a multicast frame. 1350 * Multicast traffic always uses the group key which is installed as 1351 * the default tx key. 1352 */ 1353 static __inline struct ieee80211_key * 1354 ieee80211_crypto_getmcastkey(struct ieee80211vap *vap, 1355 struct ieee80211_node *ni) 1356 { 1357 if (vap->iv_def_txkey == IEEE80211_KEYIX_NONE || 1358 IEEE80211_KEY_UNDEFINED(&vap->iv_nw_keys[vap->iv_def_txkey])) 1359 return NULL; 1360 return &vap->iv_nw_keys[vap->iv_def_txkey]; 1361 } 1362 1363 /* 1364 * Encapsulate an outbound data frame. The mbuf chain is updated. 1365 * If an error is encountered NULL is returned. The caller is required 1366 * to provide a node reference and pullup the ethernet header in the 1367 * first mbuf. 1368 * 1369 * NB: Packet is assumed to be processed by ieee80211_classify which 1370 * marked EAPOL frames w/ M_EAPOL. 1371 */ 1372 struct mbuf * 1373 ieee80211_encap(struct ieee80211vap *vap, struct ieee80211_node *ni, 1374 struct mbuf *m) 1375 { 1376 #define WH4(wh) ((struct ieee80211_frame_addr4 *)(wh)) 1377 #define MC01(mc) ((struct ieee80211_meshcntl_ae01 *)mc) 1378 struct ieee80211com *ic = ni->ni_ic; 1379 #ifdef IEEE80211_SUPPORT_MESH 1380 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1381 struct ieee80211_meshcntl_ae10 *mc; 1382 struct ieee80211_mesh_route *rt = NULL; 1383 int dir = -1; 1384 #endif 1385 struct ether_header eh; 1386 struct ieee80211_frame *wh; 1387 struct ieee80211_key *key; 1388 struct llc *llc; 1389 int hdrsize, hdrspace, datalen, addqos, txfrag, is4addr, is_mcast; 1390 ieee80211_seq seqno; 1391 int meshhdrsize, meshae; 1392 uint8_t *qos; 1393 int is_amsdu = 0; 1394 1395 IEEE80211_TX_LOCK_ASSERT(ic); 1396 1397 is_mcast = !! (m->m_flags & (M_MCAST | M_BCAST)); 1398 1399 /* 1400 * Copy existing Ethernet header to a safe place. The 1401 * rest of the code assumes it's ok to strip it when 1402 * reorganizing state for the final encapsulation. 1403 */ 1404 KASSERT(m->m_len >= sizeof(eh), ("no ethernet header!")); 1405 ETHER_HEADER_COPY(&eh, mtod(m, caddr_t)); 1406 1407 /* 1408 * Insure space for additional headers. First identify 1409 * transmit key to use in calculating any buffer adjustments 1410 * required. This is also used below to do privacy 1411 * encapsulation work. Then calculate the 802.11 header 1412 * size and any padding required by the driver. 1413 * 1414 * Note key may be NULL if we fall back to the default 1415 * transmit key and that is not set. In that case the 1416 * buffer may not be expanded as needed by the cipher 1417 * routines, but they will/should discard it. 1418 */ 1419 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 1420 if (vap->iv_opmode == IEEE80211_M_STA || 1421 !IEEE80211_IS_MULTICAST(eh.ether_dhost) || 1422 (vap->iv_opmode == IEEE80211_M_WDS && 1423 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY))) 1424 key = ieee80211_crypto_getucastkey(vap, ni); 1425 else 1426 key = ieee80211_crypto_getmcastkey(vap, ni); 1427 if (key == NULL && (m->m_flags & M_EAPOL) == 0) { 1428 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, 1429 eh.ether_dhost, 1430 "no default transmit key (%s) deftxkey %u", 1431 __func__, vap->iv_def_txkey); 1432 vap->iv_stats.is_tx_nodefkey++; 1433 goto bad; 1434 } 1435 } else 1436 key = NULL; 1437 /* 1438 * XXX Some ap's don't handle QoS-encapsulated EAPOL 1439 * frames so suppress use. This may be an issue if other 1440 * ap's require all data frames to be QoS-encapsulated 1441 * once negotiated in which case we'll need to make this 1442 * configurable. 1443 * 1444 * Don't send multicast QoS frames. 1445 * Technically multicast frames can be QoS if all stations in the 1446 * BSS are also QoS. 1447 * 1448 * NB: mesh data frames are QoS, including multicast frames. 1449 */ 1450 addqos = 1451 (((is_mcast == 0) && (ni->ni_flags & 1452 (IEEE80211_NODE_QOS|IEEE80211_NODE_HT))) || 1453 (vap->iv_opmode == IEEE80211_M_MBSS)) && 1454 (m->m_flags & M_EAPOL) == 0; 1455 1456 if (addqos) 1457 hdrsize = sizeof(struct ieee80211_qosframe); 1458 else 1459 hdrsize = sizeof(struct ieee80211_frame); 1460 #ifdef IEEE80211_SUPPORT_MESH 1461 if (vap->iv_opmode == IEEE80211_M_MBSS) { 1462 /* 1463 * Mesh data frames are encapsulated according to the 1464 * rules of Section 11B.8.5 (p.139 of D3.0 spec). 1465 * o Group Addressed data (aka multicast) originating 1466 * at the local sta are sent w/ 3-address format and 1467 * address extension mode 00 1468 * o Individually Addressed data (aka unicast) originating 1469 * at the local sta are sent w/ 4-address format and 1470 * address extension mode 00 1471 * o Group Addressed data forwarded from a non-mesh sta are 1472 * sent w/ 3-address format and address extension mode 01 1473 * o Individually Address data from another sta are sent 1474 * w/ 4-address format and address extension mode 10 1475 */ 1476 is4addr = 0; /* NB: don't use, disable */ 1477 if (!IEEE80211_IS_MULTICAST(eh.ether_dhost)) { 1478 rt = ieee80211_mesh_rt_find(vap, eh.ether_dhost); 1479 KASSERT(rt != NULL, ("route is NULL")); 1480 dir = IEEE80211_FC1_DIR_DSTODS; 1481 hdrsize += IEEE80211_ADDR_LEN; 1482 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { 1483 if (IEEE80211_ADDR_EQ(rt->rt_mesh_gate, 1484 vap->iv_myaddr)) { 1485 IEEE80211_NOTE_MAC(vap, 1486 IEEE80211_MSG_MESH, 1487 eh.ether_dhost, 1488 "%s", "trying to send to ourself"); 1489 goto bad; 1490 } 1491 meshae = IEEE80211_MESH_AE_10; 1492 meshhdrsize = 1493 sizeof(struct ieee80211_meshcntl_ae10); 1494 } else { 1495 meshae = IEEE80211_MESH_AE_00; 1496 meshhdrsize = 1497 sizeof(struct ieee80211_meshcntl); 1498 } 1499 } else { 1500 dir = IEEE80211_FC1_DIR_FROMDS; 1501 if (!IEEE80211_ADDR_EQ(eh.ether_shost, vap->iv_myaddr)) { 1502 /* proxy group */ 1503 meshae = IEEE80211_MESH_AE_01; 1504 meshhdrsize = 1505 sizeof(struct ieee80211_meshcntl_ae01); 1506 } else { 1507 /* group */ 1508 meshae = IEEE80211_MESH_AE_00; 1509 meshhdrsize = sizeof(struct ieee80211_meshcntl); 1510 } 1511 } 1512 } else { 1513 #endif 1514 /* 1515 * 4-address frames need to be generated for: 1516 * o packets sent through a WDS vap (IEEE80211_M_WDS) 1517 * o packets sent through a vap marked for relaying 1518 * (e.g. a station operating with dynamic WDS) 1519 */ 1520 is4addr = vap->iv_opmode == IEEE80211_M_WDS || 1521 ((vap->iv_flags_ext & IEEE80211_FEXT_4ADDR) && 1522 !IEEE80211_ADDR_EQ(eh.ether_shost, vap->iv_myaddr)); 1523 if (is4addr) 1524 hdrsize += IEEE80211_ADDR_LEN; 1525 meshhdrsize = meshae = 0; 1526 #ifdef IEEE80211_SUPPORT_MESH 1527 } 1528 #endif 1529 /* 1530 * Honor driver DATAPAD requirement. 1531 */ 1532 if (ic->ic_flags & IEEE80211_F_DATAPAD) 1533 hdrspace = roundup(hdrsize, sizeof(uint32_t)); 1534 else 1535 hdrspace = hdrsize; 1536 1537 if (__predict_true((m->m_flags & M_FF) == 0)) { 1538 /* 1539 * Normal frame. 1540 */ 1541 m = ieee80211_mbuf_adjust(vap, hdrspace + meshhdrsize, key, m); 1542 if (m == NULL) { 1543 /* NB: ieee80211_mbuf_adjust handles msgs+statistics */ 1544 goto bad; 1545 } 1546 /* NB: this could be optimized 'cuz of ieee80211_mbuf_adjust */ 1547 m_adj(m, sizeof(struct ether_header) - sizeof(struct llc)); 1548 llc = mtod(m, struct llc *); 1549 llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP; 1550 llc->llc_control = LLC_UI; 1551 llc->llc_snap.org_code[0] = 0; 1552 llc->llc_snap.org_code[1] = 0; 1553 llc->llc_snap.org_code[2] = 0; 1554 llc->llc_snap.ether_type = eh.ether_type; 1555 } else { 1556 #ifdef IEEE80211_SUPPORT_SUPERG 1557 /* 1558 * Aggregated frame. Check if it's for AMSDU or FF. 1559 * 1560 * XXX TODO: IEEE80211_NODE_AMSDU* isn't implemented 1561 * anywhere for some reason. But, since 11n requires 1562 * AMSDU RX, we can just assume "11n" == "AMSDU". 1563 */ 1564 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG, "%s: called; M_FF\n", __func__); 1565 if (ieee80211_amsdu_tx_ok(ni)) { 1566 m = ieee80211_amsdu_encap(vap, m, hdrspace + meshhdrsize, key); 1567 is_amsdu = 1; 1568 } else { 1569 m = ieee80211_ff_encap(vap, m, hdrspace + meshhdrsize, key); 1570 } 1571 if (m == NULL) 1572 #endif 1573 goto bad; 1574 } 1575 datalen = m->m_pkthdr.len; /* NB: w/o 802.11 header */ 1576 1577 M_PREPEND(m, hdrspace + meshhdrsize, M_NOWAIT); 1578 if (m == NULL) { 1579 vap->iv_stats.is_tx_nobuf++; 1580 goto bad; 1581 } 1582 wh = mtod(m, struct ieee80211_frame *); 1583 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_DATA; 1584 *(uint16_t *)wh->i_dur = 0; 1585 qos = NULL; /* NB: quiet compiler */ 1586 if (is4addr) { 1587 wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS; 1588 IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_macaddr); 1589 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); 1590 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_dhost); 1591 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, eh.ether_shost); 1592 } else switch (vap->iv_opmode) { 1593 case IEEE80211_M_STA: 1594 wh->i_fc[1] = IEEE80211_FC1_DIR_TODS; 1595 IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_bssid); 1596 IEEE80211_ADDR_COPY(wh->i_addr2, eh.ether_shost); 1597 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_dhost); 1598 break; 1599 case IEEE80211_M_IBSS: 1600 case IEEE80211_M_AHDEMO: 1601 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 1602 IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost); 1603 IEEE80211_ADDR_COPY(wh->i_addr2, eh.ether_shost); 1604 /* 1605 * NB: always use the bssid from iv_bss as the 1606 * neighbor's may be stale after an ibss merge 1607 */ 1608 IEEE80211_ADDR_COPY(wh->i_addr3, vap->iv_bss->ni_bssid); 1609 break; 1610 case IEEE80211_M_HOSTAP: 1611 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS; 1612 IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost); 1613 IEEE80211_ADDR_COPY(wh->i_addr2, ni->ni_bssid); 1614 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_shost); 1615 break; 1616 #ifdef IEEE80211_SUPPORT_MESH 1617 case IEEE80211_M_MBSS: 1618 /* NB: offset by hdrspace to deal with DATAPAD */ 1619 mc = (struct ieee80211_meshcntl_ae10 *) 1620 (mtod(m, uint8_t *) + hdrspace); 1621 wh->i_fc[1] = dir; 1622 switch (meshae) { 1623 case IEEE80211_MESH_AE_00: /* no proxy */ 1624 mc->mc_flags = 0; 1625 if (dir == IEEE80211_FC1_DIR_DSTODS) { /* ucast */ 1626 IEEE80211_ADDR_COPY(wh->i_addr1, 1627 ni->ni_macaddr); 1628 IEEE80211_ADDR_COPY(wh->i_addr2, 1629 vap->iv_myaddr); 1630 IEEE80211_ADDR_COPY(wh->i_addr3, 1631 eh.ether_dhost); 1632 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, 1633 eh.ether_shost); 1634 qos =((struct ieee80211_qosframe_addr4 *) 1635 wh)->i_qos; 1636 } else if (dir == IEEE80211_FC1_DIR_FROMDS) { 1637 /* mcast */ 1638 IEEE80211_ADDR_COPY(wh->i_addr1, 1639 eh.ether_dhost); 1640 IEEE80211_ADDR_COPY(wh->i_addr2, 1641 vap->iv_myaddr); 1642 IEEE80211_ADDR_COPY(wh->i_addr3, 1643 eh.ether_shost); 1644 qos = ((struct ieee80211_qosframe *) 1645 wh)->i_qos; 1646 } 1647 break; 1648 case IEEE80211_MESH_AE_01: /* mcast, proxy */ 1649 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS; 1650 IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost); 1651 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); 1652 IEEE80211_ADDR_COPY(wh->i_addr3, vap->iv_myaddr); 1653 mc->mc_flags = 1; 1654 IEEE80211_ADDR_COPY(MC01(mc)->mc_addr4, 1655 eh.ether_shost); 1656 qos = ((struct ieee80211_qosframe *) wh)->i_qos; 1657 break; 1658 case IEEE80211_MESH_AE_10: /* ucast, proxy */ 1659 KASSERT(rt != NULL, ("route is NULL")); 1660 IEEE80211_ADDR_COPY(wh->i_addr1, rt->rt_nexthop); 1661 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); 1662 IEEE80211_ADDR_COPY(wh->i_addr3, rt->rt_mesh_gate); 1663 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, vap->iv_myaddr); 1664 mc->mc_flags = IEEE80211_MESH_AE_10; 1665 IEEE80211_ADDR_COPY(mc->mc_addr5, eh.ether_dhost); 1666 IEEE80211_ADDR_COPY(mc->mc_addr6, eh.ether_shost); 1667 qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos; 1668 break; 1669 default: 1670 KASSERT(0, ("meshae %d", meshae)); 1671 break; 1672 } 1673 mc->mc_ttl = ms->ms_ttl; 1674 ms->ms_seq++; 1675 le32enc(mc->mc_seq, ms->ms_seq); 1676 break; 1677 #endif 1678 case IEEE80211_M_WDS: /* NB: is4addr should always be true */ 1679 default: 1680 goto bad; 1681 } 1682 if (m->m_flags & M_MORE_DATA) 1683 wh->i_fc[1] |= IEEE80211_FC1_MORE_DATA; 1684 if (addqos) { 1685 int ac, tid; 1686 1687 if (is4addr) { 1688 qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos; 1689 /* NB: mesh case handled earlier */ 1690 } else if (vap->iv_opmode != IEEE80211_M_MBSS) 1691 qos = ((struct ieee80211_qosframe *) wh)->i_qos; 1692 ac = M_WME_GETAC(m); 1693 /* map from access class/queue to 11e header priorty value */ 1694 tid = WME_AC_TO_TID(ac); 1695 qos[0] = tid & IEEE80211_QOS_TID; 1696 if (ic->ic_wme.wme_wmeChanParams.cap_wmeParams[ac].wmep_noackPolicy) 1697 qos[0] |= IEEE80211_QOS_ACKPOLICY_NOACK; 1698 #ifdef IEEE80211_SUPPORT_MESH 1699 if (vap->iv_opmode == IEEE80211_M_MBSS) 1700 qos[1] = IEEE80211_QOS_MC; 1701 else 1702 #endif 1703 qos[1] = 0; 1704 wh->i_fc[0] |= IEEE80211_FC0_SUBTYPE_QOS; 1705 1706 /* 1707 * If this is an A-MSDU then ensure we set the 1708 * relevant field. 1709 */ 1710 if (is_amsdu) 1711 qos[0] |= IEEE80211_QOS_AMSDU; 1712 1713 /* 1714 * XXX TODO TX lock is needed for atomic updates of sequence 1715 * numbers. If the driver does it, then don't do it here; 1716 * and we don't need the TX lock held. 1717 */ 1718 if ((m->m_flags & M_AMPDU_MPDU) == 0) { 1719 /* 1720 * 802.11-2012 9.3.2.10 - 1721 * 1722 * If this is a multicast frame then we need 1723 * to ensure that the sequence number comes from 1724 * a separate seqno space and not the TID space. 1725 * 1726 * Otherwise multicast frames may actually cause 1727 * holes in the TX blockack window space and 1728 * upset various things. 1729 */ 1730 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) 1731 seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]++; 1732 else 1733 seqno = ni->ni_txseqs[tid]++; 1734 1735 /* 1736 * NB: don't assign a sequence # to potential 1737 * aggregates; we expect this happens at the 1738 * point the frame comes off any aggregation q 1739 * as otherwise we may introduce holes in the 1740 * BA sequence space and/or make window accouting 1741 * more difficult. 1742 * 1743 * XXX may want to control this with a driver 1744 * capability; this may also change when we pull 1745 * aggregation up into net80211 1746 */ 1747 seqno = ni->ni_txseqs[tid]++; 1748 *(uint16_t *)wh->i_seq = 1749 htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); 1750 M_SEQNO_SET(m, seqno); 1751 } else { 1752 /* NB: zero out i_seq field (for s/w encryption etc) */ 1753 *(uint16_t *)wh->i_seq = 0; 1754 } 1755 } else { 1756 /* 1757 * XXX TODO TX lock is needed for atomic updates of sequence 1758 * numbers. If the driver does it, then don't do it here; 1759 * and we don't need the TX lock held. 1760 */ 1761 seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]++; 1762 *(uint16_t *)wh->i_seq = 1763 htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); 1764 M_SEQNO_SET(m, seqno); 1765 1766 /* 1767 * XXX TODO: we shouldn't allow EAPOL, etc that would 1768 * be forced to be non-QoS traffic to be A-MSDU encapsulated. 1769 */ 1770 if (is_amsdu) 1771 printf("%s: XXX ERROR: is_amsdu set; not QoS!\n", 1772 __func__); 1773 } 1774 1775 /* 1776 * Check if xmit fragmentation is required. 1777 * 1778 * If the hardware does fragmentation offload, then don't bother 1779 * doing it here. 1780 */ 1781 if (IEEE80211_CONF_FRAG_OFFLOAD(ic)) 1782 txfrag = 0; 1783 else 1784 txfrag = (m->m_pkthdr.len > vap->iv_fragthreshold && 1785 !IEEE80211_IS_MULTICAST(wh->i_addr1) && 1786 (vap->iv_caps & IEEE80211_C_TXFRAG) && 1787 (m->m_flags & (M_FF | M_AMPDU_MPDU)) == 0); 1788 1789 if (key != NULL) { 1790 /* 1791 * IEEE 802.1X: send EAPOL frames always in the clear. 1792 * WPA/WPA2: encrypt EAPOL keys when pairwise keys are set. 1793 */ 1794 if ((m->m_flags & M_EAPOL) == 0 || 1795 ((vap->iv_flags & IEEE80211_F_WPA) && 1796 (vap->iv_opmode == IEEE80211_M_STA ? 1797 !IEEE80211_KEY_UNDEFINED(key) : 1798 !IEEE80211_KEY_UNDEFINED(&ni->ni_ucastkey)))) { 1799 wh->i_fc[1] |= IEEE80211_FC1_PROTECTED; 1800 if (!ieee80211_crypto_enmic(vap, key, m, txfrag)) { 1801 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, 1802 eh.ether_dhost, 1803 "%s", "enmic failed, discard frame"); 1804 vap->iv_stats.is_crypto_enmicfail++; 1805 goto bad; 1806 } 1807 } 1808 } 1809 if (txfrag && !ieee80211_fragment(vap, m, hdrsize, 1810 key != NULL ? key->wk_cipher->ic_header : 0, vap->iv_fragthreshold)) 1811 goto bad; 1812 1813 m->m_flags |= M_ENCAP; /* mark encapsulated */ 1814 1815 IEEE80211_NODE_STAT(ni, tx_data); 1816 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1817 IEEE80211_NODE_STAT(ni, tx_mcast); 1818 m->m_flags |= M_MCAST; 1819 } else 1820 IEEE80211_NODE_STAT(ni, tx_ucast); 1821 IEEE80211_NODE_STAT_ADD(ni, tx_bytes, datalen); 1822 1823 return m; 1824 bad: 1825 if (m != NULL) 1826 m_freem(m); 1827 return NULL; 1828 #undef WH4 1829 #undef MC01 1830 } 1831 1832 void 1833 ieee80211_free_mbuf(struct mbuf *m) 1834 { 1835 struct mbuf *next; 1836 1837 if (m == NULL) 1838 return; 1839 1840 do { 1841 next = m->m_nextpkt; 1842 m->m_nextpkt = NULL; 1843 m_freem(m); 1844 } while ((m = next) != NULL); 1845 } 1846 1847 /* 1848 * Fragment the frame according to the specified mtu. 1849 * The size of the 802.11 header (w/o padding) is provided 1850 * so we don't need to recalculate it. We create a new 1851 * mbuf for each fragment and chain it through m_nextpkt; 1852 * we might be able to optimize this by reusing the original 1853 * packet's mbufs but that is significantly more complicated. 1854 */ 1855 static int 1856 ieee80211_fragment(struct ieee80211vap *vap, struct mbuf *m0, 1857 u_int hdrsize, u_int ciphdrsize, u_int mtu) 1858 { 1859 struct ieee80211com *ic = vap->iv_ic; 1860 struct ieee80211_frame *wh, *whf; 1861 struct mbuf *m, *prev; 1862 u_int totalhdrsize, fragno, fragsize, off, remainder, payload; 1863 u_int hdrspace; 1864 1865 KASSERT(m0->m_nextpkt == NULL, ("mbuf already chained?")); 1866 KASSERT(m0->m_pkthdr.len > mtu, 1867 ("pktlen %u mtu %u", m0->m_pkthdr.len, mtu)); 1868 1869 /* 1870 * Honor driver DATAPAD requirement. 1871 */ 1872 if (ic->ic_flags & IEEE80211_F_DATAPAD) 1873 hdrspace = roundup(hdrsize, sizeof(uint32_t)); 1874 else 1875 hdrspace = hdrsize; 1876 1877 wh = mtod(m0, struct ieee80211_frame *); 1878 /* NB: mark the first frag; it will be propagated below */ 1879 wh->i_fc[1] |= IEEE80211_FC1_MORE_FRAG; 1880 totalhdrsize = hdrspace + ciphdrsize; 1881 fragno = 1; 1882 off = mtu - ciphdrsize; 1883 remainder = m0->m_pkthdr.len - off; 1884 prev = m0; 1885 do { 1886 fragsize = MIN(totalhdrsize + remainder, mtu); 1887 #if __FreeBSD__ 1888 m = m_get2(fragsize, M_NOWAIT, MT_DATA, M_PKTHDR); 1889 #elif __NetBSD__ 1890 m = m_get(M_NOWAIT, MT_DATA); 1891 #endif 1892 if (m == NULL) 1893 goto bad; 1894 /* leave room to prepend any cipher header */ 1895 m_align(m, fragsize - ciphdrsize); 1896 1897 /* 1898 * Form the header in the fragment. Note that since 1899 * we mark the first fragment with the MORE_FRAG bit 1900 * it automatically is propagated to each fragment; we 1901 * need only clear it on the last fragment (done below). 1902 * NB: frag 1+ dont have Mesh Control field present. 1903 */ 1904 whf = mtod(m, struct ieee80211_frame *); 1905 memcpy(whf, wh, hdrsize); 1906 #ifdef IEEE80211_SUPPORT_MESH 1907 if (vap->iv_opmode == IEEE80211_M_MBSS) { 1908 if (IEEE80211_IS_DSTODS(wh)) 1909 ((struct ieee80211_qosframe_addr4 *) 1910 whf)->i_qos[1] &= ~IEEE80211_QOS_MC; 1911 else 1912 ((struct ieee80211_qosframe *) 1913 whf)->i_qos[1] &= ~IEEE80211_QOS_MC; 1914 } 1915 #endif 1916 *(uint16_t *)&whf->i_seq[0] |= htole16( 1917 (fragno & IEEE80211_SEQ_FRAG_MASK) << 1918 IEEE80211_SEQ_FRAG_SHIFT); 1919 fragno++; 1920 1921 payload = fragsize - totalhdrsize; 1922 /* NB: destination is known to be contiguous */ 1923 1924 m_copydata(m0, off, payload, mtod(m, uint8_t *) + hdrspace); 1925 m->m_len = hdrspace + payload; 1926 m->m_pkthdr.len = hdrspace + payload; 1927 m->m_flags |= M_FRAG; 1928 1929 /* chain up the fragment */ 1930 prev->m_nextpkt = m; 1931 prev = m; 1932 1933 /* deduct fragment just formed */ 1934 remainder -= payload; 1935 off += payload; 1936 } while (remainder != 0); 1937 1938 /* set the last fragment */ 1939 m->m_flags |= M_LASTFRAG; 1940 whf->i_fc[1] &= ~IEEE80211_FC1_MORE_FRAG; 1941 1942 /* strip first mbuf now that everything has been copied */ 1943 m_adj(m0, -(m0->m_pkthdr.len - (mtu - ciphdrsize))); 1944 m0->m_flags |= M_FIRSTFRAG | M_FRAG; 1945 1946 vap->iv_stats.is_tx_fragframes++; 1947 vap->iv_stats.is_tx_frags += fragno-1; 1948 1949 return 1; 1950 bad: 1951 /* reclaim fragments but leave original frame for caller to free */ 1952 ieee80211_free_mbuf(m0->m_nextpkt); 1953 m0->m_nextpkt = NULL; 1954 return 0; 1955 } 1956 1957 /* 1958 * Add a supported rates element id to a frame. 1959 */ 1960 uint8_t * 1961 ieee80211_add_rates(uint8_t *frm, const struct ieee80211_rateset *rs) 1962 { 1963 int nrates; 1964 1965 *frm++ = IEEE80211_ELEMID_RATES; 1966 nrates = rs->rs_nrates; 1967 if (nrates > IEEE80211_RATE_SIZE) 1968 nrates = IEEE80211_RATE_SIZE; 1969 *frm++ = nrates; 1970 memcpy(frm, rs->rs_rates, nrates); 1971 return frm + nrates; 1972 } 1973 1974 /* 1975 * Add an extended supported rates element id to a frame. 1976 */ 1977 uint8_t * 1978 ieee80211_add_xrates(uint8_t *frm, const struct ieee80211_rateset *rs) 1979 { 1980 /* 1981 * Add an extended supported rates element if operating in 11g mode. 1982 */ 1983 if (rs->rs_nrates > IEEE80211_RATE_SIZE) { 1984 int nrates = rs->rs_nrates - IEEE80211_RATE_SIZE; 1985 *frm++ = IEEE80211_ELEMID_XRATES; 1986 *frm++ = nrates; 1987 memcpy(frm, rs->rs_rates + IEEE80211_RATE_SIZE, nrates); 1988 frm += nrates; 1989 } 1990 return frm; 1991 } 1992 1993 /* 1994 * Add an ssid element to a frame. 1995 */ 1996 uint8_t * 1997 ieee80211_add_ssid(uint8_t *frm, const uint8_t *ssid, u_int len) 1998 { 1999 *frm++ = IEEE80211_ELEMID_SSID; 2000 *frm++ = len; 2001 memcpy(frm, ssid, len); 2002 return frm + len; 2003 } 2004 2005 /* 2006 * Add an erp element to a frame. 2007 */ 2008 static uint8_t * 2009 ieee80211_add_erp(uint8_t *frm, struct ieee80211com *ic) 2010 { 2011 uint8_t erp; 2012 2013 *frm++ = IEEE80211_ELEMID_ERP; 2014 *frm++ = 1; 2015 erp = 0; 2016 if (ic->ic_nonerpsta != 0) 2017 erp |= IEEE80211_ERP_NON_ERP_PRESENT; 2018 if (ic->ic_flags & IEEE80211_F_USEPROT) 2019 erp |= IEEE80211_ERP_USE_PROTECTION; 2020 if (ic->ic_flags & IEEE80211_F_USEBARKER) 2021 erp |= IEEE80211_ERP_LONG_PREAMBLE; 2022 *frm++ = erp; 2023 return frm; 2024 } 2025 2026 /* 2027 * Add a CFParams element to a frame. 2028 */ 2029 static uint8_t * 2030 ieee80211_add_cfparms(uint8_t *frm, struct ieee80211com *ic) 2031 { 2032 #define ADDSHORT(frm, v) do { \ 2033 le16enc(frm, v); \ 2034 frm += 2; \ 2035 } while (0) 2036 *frm++ = IEEE80211_ELEMID_CFPARMS; 2037 *frm++ = 6; 2038 *frm++ = 0; /* CFP count */ 2039 *frm++ = 2; /* CFP period */ 2040 ADDSHORT(frm, 0); /* CFP MaxDuration (TU) */ 2041 ADDSHORT(frm, 0); /* CFP CurRemaining (TU) */ 2042 return frm; 2043 #undef ADDSHORT 2044 } 2045 2046 static __inline uint8_t * 2047 add_appie(uint8_t *frm, const struct ieee80211_appie *ie) 2048 { 2049 memcpy(frm, ie->ie_data, ie->ie_len); 2050 return frm + ie->ie_len; 2051 } 2052 2053 static __inline uint8_t * 2054 add_ie(uint8_t *frm, const uint8_t *ie) 2055 { 2056 memcpy(frm, ie, 2 + ie[1]); 2057 return frm + 2 + ie[1]; 2058 } 2059 2060 #define WME_OUI_BYTES 0x00, 0x50, 0xf2 2061 /* 2062 * Add a WME information element to a frame. 2063 */ 2064 uint8_t * 2065 ieee80211_add_wme_info(uint8_t *frm, struct ieee80211_wme_state *wme) 2066 { 2067 static const struct ieee80211_wme_info info = { 2068 .wme_id = IEEE80211_ELEMID_VENDOR, 2069 .wme_len = sizeof(struct ieee80211_wme_info) - 2, 2070 .wme_oui = { WME_OUI_BYTES }, 2071 .wme_type = WME_OUI_TYPE, 2072 .wme_subtype = WME_INFO_OUI_SUBTYPE, 2073 .wme_version = WME_VERSION, 2074 .wme_info = 0, 2075 }; 2076 memcpy(frm, &info, sizeof(info)); 2077 return frm + sizeof(info); 2078 } 2079 2080 /* 2081 * Add a WME parameters element to a frame. 2082 */ 2083 static uint8_t * 2084 ieee80211_add_wme_param(uint8_t *frm, struct ieee80211_wme_state *wme) 2085 { 2086 #define SM(_v, _f) (((_v) << _f##_S) & _f) 2087 #define ADDSHORT(frm, v) do { \ 2088 le16enc(frm, v); \ 2089 frm += 2; \ 2090 } while (0) 2091 /* NB: this works 'cuz a param has an info at the front */ 2092 static const struct ieee80211_wme_info param = { 2093 .wme_id = IEEE80211_ELEMID_VENDOR, 2094 .wme_len = sizeof(struct ieee80211_wme_param) - 2, 2095 .wme_oui = { WME_OUI_BYTES }, 2096 .wme_type = WME_OUI_TYPE, 2097 .wme_subtype = WME_PARAM_OUI_SUBTYPE, 2098 .wme_version = WME_VERSION, 2099 }; 2100 int i; 2101 2102 memcpy(frm, ¶m, sizeof(param)); 2103 frm += __offsetof(struct ieee80211_wme_info, wme_info); 2104 *frm++ = wme->wme_bssChanParams.cap_info; /* AC info */ 2105 *frm++ = 0; /* reserved field */ 2106 for (i = 0; i < WME_NUM_AC; i++) { 2107 const struct wmeParams *ac = 2108 &wme->wme_bssChanParams.cap_wmeParams[i]; 2109 *frm++ = SM(i, WME_PARAM_ACI) 2110 | SM(ac->wmep_acm, WME_PARAM_ACM) 2111 | SM(ac->wmep_aifsn, WME_PARAM_AIFSN) 2112 ; 2113 *frm++ = SM(ac->wmep_logcwmax, WME_PARAM_LOGCWMAX) 2114 | SM(ac->wmep_logcwmin, WME_PARAM_LOGCWMIN) 2115 ; 2116 ADDSHORT(frm, ac->wmep_txopLimit); 2117 } 2118 return frm; 2119 #undef SM 2120 #undef ADDSHORT 2121 } 2122 #undef WME_OUI_BYTES 2123 2124 /* 2125 * Add an 11h Power Constraint element to a frame. 2126 */ 2127 static uint8_t * 2128 ieee80211_add_powerconstraint(uint8_t *frm, struct ieee80211vap *vap) 2129 { 2130 const struct ieee80211_channel *c = vap->iv_bss->ni_chan; 2131 /* XXX per-vap tx power limit? */ 2132 int8_t limit = vap->iv_ic->ic_txpowlimit / 2; 2133 2134 frm[0] = IEEE80211_ELEMID_PWRCNSTR; 2135 frm[1] = 1; 2136 frm[2] = c->ic_maxregpower > limit ? c->ic_maxregpower - limit : 0; 2137 return frm + 3; 2138 } 2139 2140 /* 2141 * Add an 11h Power Capability element to a frame. 2142 */ 2143 static uint8_t * 2144 ieee80211_add_powercapability(uint8_t *frm, const struct ieee80211_channel *c) 2145 { 2146 frm[0] = IEEE80211_ELEMID_PWRCAP; 2147 frm[1] = 2; 2148 frm[2] = c->ic_minpower; 2149 frm[3] = c->ic_maxpower; 2150 return frm + 4; 2151 } 2152 2153 /* 2154 * Add an 11h Supported Channels element to a frame. 2155 */ 2156 static uint8_t * 2157 ieee80211_add_supportedchannels(uint8_t *frm, struct ieee80211com *ic) 2158 { 2159 static const int ielen = 26; 2160 2161 frm[0] = IEEE80211_ELEMID_SUPPCHAN; 2162 frm[1] = ielen; 2163 /* XXX not correct */ 2164 memcpy(frm+2, ic->ic_chan_avail, ielen); 2165 return frm + 2 + ielen; 2166 } 2167 2168 /* 2169 * Add an 11h Quiet time element to a frame. 2170 */ 2171 static uint8_t * 2172 ieee80211_add_quiet(uint8_t *frm, struct ieee80211vap *vap, int update) 2173 { 2174 struct ieee80211_quiet_ie *quiet = (struct ieee80211_quiet_ie *) frm; 2175 2176 quiet->quiet_ie = IEEE80211_ELEMID_QUIET; 2177 quiet->len = 6; 2178 2179 /* 2180 * Only update every beacon interval - otherwise probe responses 2181 * would update the quiet count value. 2182 */ 2183 if (update) { 2184 if (vap->iv_quiet_count_value == 1) 2185 vap->iv_quiet_count_value = vap->iv_quiet_count; 2186 else if (vap->iv_quiet_count_value > 1) 2187 vap->iv_quiet_count_value--; 2188 } 2189 2190 if (vap->iv_quiet_count_value == 0) { 2191 /* value 0 is reserved as per 802.11h standerd */ 2192 vap->iv_quiet_count_value = 1; 2193 } 2194 2195 quiet->tbttcount = vap->iv_quiet_count_value; 2196 quiet->period = vap->iv_quiet_period; 2197 quiet->duration = htole16(vap->iv_quiet_duration); 2198 quiet->offset = htole16(vap->iv_quiet_offset); 2199 return frm + sizeof(*quiet); 2200 } 2201 2202 /* 2203 * Add an 11h Channel Switch Announcement element to a frame. 2204 * Note that we use the per-vap CSA count to adjust the global 2205 * counter so we can use this routine to form probe response 2206 * frames and get the current count. 2207 */ 2208 static uint8_t * 2209 ieee80211_add_csa(uint8_t *frm, struct ieee80211vap *vap) 2210 { 2211 struct ieee80211com *ic = vap->iv_ic; 2212 struct ieee80211_csa_ie *csa = (struct ieee80211_csa_ie *) frm; 2213 2214 csa->csa_ie = IEEE80211_ELEMID_CSA; 2215 csa->csa_len = 3; 2216 csa->csa_mode = 1; /* XXX force quiet on channel */ 2217 csa->csa_newchan = ieee80211_chan2ieee(ic, ic->ic_csa_newchan); 2218 csa->csa_count = ic->ic_csa_count - vap->iv_csa_count; 2219 return frm + sizeof(*csa); 2220 } 2221 2222 /* 2223 * Add an 11h country information element to a frame. 2224 */ 2225 static uint8_t * 2226 ieee80211_add_countryie(uint8_t *frm, struct ieee80211com *ic) 2227 { 2228 2229 if (ic->ic_countryie == NULL || 2230 ic->ic_countryie_chan != ic->ic_bsschan) { 2231 /* 2232 * Handle lazy construction of ie. This is done on 2233 * first use and after a channel change that requires 2234 * re-calculation. 2235 */ 2236 if (ic->ic_countryie != NULL) 2237 IEEE80211_FREE(ic->ic_countryie, M_80211_NODE_IE); 2238 ic->ic_countryie = ieee80211_alloc_countryie(ic); 2239 if (ic->ic_countryie == NULL) 2240 return frm; 2241 ic->ic_countryie_chan = ic->ic_bsschan; 2242 } 2243 return add_appie(frm, ic->ic_countryie); 2244 } 2245 2246 uint8_t * 2247 ieee80211_add_wpa(uint8_t *frm, const struct ieee80211vap *vap) 2248 { 2249 if (vap->iv_flags & IEEE80211_F_WPA1 && vap->iv_wpa_ie != NULL) 2250 return (add_ie(frm, vap->iv_wpa_ie)); 2251 else { 2252 /* XXX else complain? */ 2253 return (frm); 2254 } 2255 } 2256 2257 uint8_t * 2258 ieee80211_add_rsn(uint8_t *frm, const struct ieee80211vap *vap) 2259 { 2260 if (vap->iv_flags & IEEE80211_F_WPA2 && vap->iv_rsn_ie != NULL) 2261 return (add_ie(frm, vap->iv_rsn_ie)); 2262 else { 2263 /* XXX else complain? */ 2264 return (frm); 2265 } 2266 } 2267 2268 uint8_t * 2269 ieee80211_add_qos(uint8_t *frm, const struct ieee80211_node *ni) 2270 { 2271 if (ni->ni_flags & IEEE80211_NODE_QOS) { 2272 *frm++ = IEEE80211_ELEMID_QOS; 2273 *frm++ = 1; 2274 *frm++ = 0; 2275 } 2276 2277 return (frm); 2278 } 2279 2280 /* 2281 * Send a probe request frame with the specified ssid 2282 * and any optional information element data. 2283 */ 2284 int 2285 ieee80211_send_probereq(struct ieee80211_node *ni, 2286 const uint8_t sa[IEEE80211_ADDR_LEN], 2287 const uint8_t da[IEEE80211_ADDR_LEN], 2288 const uint8_t bssid[IEEE80211_ADDR_LEN], 2289 const uint8_t *ssid, size_t ssidlen) 2290 { 2291 struct ieee80211vap *vap = ni->ni_vap; 2292 struct ieee80211com *ic = ni->ni_ic; 2293 struct ieee80211_node *bss; 2294 const struct ieee80211_txparam *tp; 2295 struct ieee80211_bpf_params params; 2296 const struct ieee80211_rateset *rs; 2297 struct mbuf *m; 2298 uint8_t *frm; 2299 int ret; 2300 2301 bss = ieee80211_ref_node(vap->iv_bss); 2302 2303 if (vap->iv_state == IEEE80211_S_CAC) { 2304 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni, 2305 "block %s frame in CAC state", "probe request"); 2306 vap->iv_stats.is_tx_badstate++; 2307 ieee80211_free_node(bss); 2308 return EIO; /* XXX */ 2309 } 2310 2311 /* 2312 * Hold a reference on the node so it doesn't go away until after 2313 * the xmit is complete all the way in the driver. On error we 2314 * will remove our reference. 2315 */ 2316 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2317 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", 2318 __func__, __LINE__, 2319 ni, ether_sprintf(ni->ni_macaddr), 2320 ieee80211_node_refcnt(ni)+1); 2321 ieee80211_ref_node(ni); 2322 2323 /* 2324 * prreq frame format 2325 * [tlv] ssid 2326 * [tlv] supported rates 2327 * [tlv] RSN (optional) 2328 * [tlv] extended supported rates 2329 * [tlv] HT cap (optional) 2330 * [tlv] VHT cap (optional) 2331 * [tlv] WPA (optional) 2332 * [tlv] user-specified ie's 2333 */ 2334 m = ieee80211_getmgtframe(&frm, 2335 ic->ic_headroom + sizeof(struct ieee80211_frame), 2336 2 + IEEE80211_NWID_LEN 2337 + 2 + IEEE80211_RATE_SIZE 2338 + sizeof(struct ieee80211_ie_htcap) 2339 + sizeof(struct ieee80211_ie_vhtcap) 2340 + sizeof(struct ieee80211_ie_htinfo) /* XXX not needed? */ 2341 + sizeof(struct ieee80211_ie_wpa) 2342 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2343 + sizeof(struct ieee80211_ie_wpa) 2344 + (vap->iv_appie_probereq != NULL ? 2345 vap->iv_appie_probereq->ie_len : 0) 2346 ); 2347 if (m == NULL) { 2348 vap->iv_stats.is_tx_nobuf++; 2349 ieee80211_free_node(ni); 2350 ieee80211_free_node(bss); 2351 return ENOMEM; 2352 } 2353 2354 frm = ieee80211_add_ssid(frm, ssid, ssidlen); 2355 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2356 frm = ieee80211_add_rates(frm, rs); 2357 frm = ieee80211_add_rsn(frm, vap); 2358 frm = ieee80211_add_xrates(frm, rs); 2359 2360 /* 2361 * Note: we can't use bss; we don't have one yet. 2362 * 2363 * So, we should announce our capabilities 2364 * in this channel mode (2g/5g), not the 2365 * channel details itself. 2366 */ 2367 if ((vap->iv_opmode == IEEE80211_M_IBSS) && 2368 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 2369 struct ieee80211_channel *c; 2370 2371 /* 2372 * Get the HT channel that we should try upgrading to. 2373 * If we can do 40MHz then this'll upgrade it appropriately. 2374 */ 2375 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, 2376 vap->iv_flags_ht); 2377 frm = ieee80211_add_htcap_ch(frm, vap, c); 2378 } 2379 2380 /* 2381 * XXX TODO: need to figure out what/how to update the 2382 * VHT channel. 2383 */ 2384 #if 0 2385 (vap->iv_flags_vht & IEEE80211_FVHT_VHT) { 2386 struct ieee80211_channel *c; 2387 2388 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, 2389 vap->iv_flags_ht); 2390 c = ieee80211_vht_adjust_channel(ic, c, vap->iv_flags_vht); 2391 frm = ieee80211_add_vhtcap_ch(frm, vap, c); 2392 } 2393 #endif 2394 2395 frm = ieee80211_add_wpa(frm, vap); 2396 if (vap->iv_appie_probereq != NULL) 2397 frm = add_appie(frm, vap->iv_appie_probereq); 2398 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2399 2400 KASSERT(M_LEADINGSPACE(m) >= sizeof(struct ieee80211_frame), 2401 ("leading space %zd", M_LEADINGSPACE(m))); 2402 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); 2403 if (m == NULL) { 2404 /* NB: cannot happen */ 2405 ieee80211_free_node(ni); 2406 ieee80211_free_node(bss); 2407 return ENOMEM; 2408 } 2409 2410 IEEE80211_TX_LOCK(ic); 2411 ieee80211_send_setup(ni, m, 2412 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ, 2413 IEEE80211_NONQOS_TID, sa, da, bssid); 2414 /* XXX power management? */ 2415 m->m_flags |= M_ENCAP; /* mark encapsulated */ 2416 2417 M_WME_SETAC(m, WME_AC_BE); 2418 2419 IEEE80211_NODE_STAT(ni, tx_probereq); 2420 IEEE80211_NODE_STAT(ni, tx_mgmt); 2421 2422 IEEE80211_DPRINTF(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS, 2423 "send probe req on channel %u bssid %s sa %6D da %6D ssid \"%.*s\"\n", 2424 ieee80211_chan2ieee(ic, ic->ic_curchan), 2425 ether_sprintf(bssid), 2426 sa, ":", 2427 da, ":", 2428 ssidlen, ssid); 2429 2430 memset(¶ms, 0, sizeof(params)); 2431 params.ibp_pri = M_WME_GETAC(m); 2432 tp = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)]; 2433 params.ibp_rate0 = tp->mgmtrate; 2434 if (IEEE80211_IS_MULTICAST(da)) { 2435 params.ibp_flags |= IEEE80211_BPF_NOACK; 2436 params.ibp_try0 = 1; 2437 } else 2438 params.ibp_try0 = tp->maxretry; 2439 params.ibp_power = ni->ni_txpower; 2440 ret = ieee80211_raw_output(vap, ni, m, ¶ms); 2441 IEEE80211_TX_UNLOCK(ic); 2442 ieee80211_free_node(bss); 2443 return (ret); 2444 } 2445 2446 /* 2447 * Calculate capability information for mgt frames. 2448 */ 2449 uint16_t 2450 ieee80211_getcapinfo(struct ieee80211vap *vap, struct ieee80211_channel *chan) 2451 { 2452 struct ieee80211com *ic = vap->iv_ic; 2453 uint16_t capinfo; 2454 2455 KASSERT(vap->iv_opmode != IEEE80211_M_STA, ("station mode")); 2456 2457 if (vap->iv_opmode == IEEE80211_M_HOSTAP) 2458 capinfo = IEEE80211_CAPINFO_ESS; 2459 else if (vap->iv_opmode == IEEE80211_M_IBSS) 2460 capinfo = IEEE80211_CAPINFO_IBSS; 2461 else 2462 capinfo = 0; 2463 if (vap->iv_flags & IEEE80211_F_PRIVACY) 2464 capinfo |= IEEE80211_CAPINFO_PRIVACY; 2465 if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && 2466 IEEE80211_IS_CHAN_2GHZ(chan)) 2467 capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE; 2468 if (ic->ic_flags & IEEE80211_F_SHSLOT) 2469 capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME; 2470 if (IEEE80211_IS_CHAN_5GHZ(chan) && (vap->iv_flags & IEEE80211_F_DOTH)) 2471 capinfo |= IEEE80211_CAPINFO_SPECTRUM_MGMT; 2472 return capinfo; 2473 } 2474 2475 /* 2476 * Send a management frame. The node is for the destination (or ic_bss 2477 * when in station mode). Nodes other than ic_bss have their reference 2478 * count bumped to reflect our use for an indeterminant time. 2479 */ 2480 int 2481 ieee80211_send_mgmt(struct ieee80211_node *ni, int type, int arg) 2482 { 2483 #define HTFLAGS (IEEE80211_NODE_HT | IEEE80211_NODE_HTCOMPAT) 2484 #define senderr(_x, _v) do { vap->iv_stats._v++; ret = _x; goto bad; } while (0) 2485 struct ieee80211vap *vap = ni->ni_vap; 2486 struct ieee80211com *ic = ni->ni_ic; 2487 struct ieee80211_node *bss = vap->iv_bss; 2488 struct ieee80211_bpf_params params; 2489 struct mbuf *m; 2490 uint8_t *frm; 2491 uint16_t capinfo; 2492 int has_challenge, is_shared_key, ret, status; 2493 2494 KASSERT(ni != NULL, ("null node")); 2495 2496 /* 2497 * Hold a reference on the node so it doesn't go away until after 2498 * the xmit is complete all the way in the driver. On error we 2499 * will remove our reference. 2500 */ 2501 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2502 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", 2503 __func__, __LINE__, 2504 ni, ether_sprintf(ni->ni_macaddr), 2505 ieee80211_node_refcnt(ni)+1); 2506 ieee80211_ref_node(ni); 2507 2508 memset(¶ms, 0, sizeof(params)); 2509 switch (type) { 2510 2511 case IEEE80211_FC0_SUBTYPE_AUTH: 2512 status = arg >> 16; 2513 arg &= 0xffff; 2514 has_challenge = ((arg == IEEE80211_AUTH_SHARED_CHALLENGE || 2515 arg == IEEE80211_AUTH_SHARED_RESPONSE) && 2516 ni->ni_challenge != NULL); 2517 2518 /* 2519 * Deduce whether we're doing open authentication or 2520 * shared key authentication. We do the latter if 2521 * we're in the middle of a shared key authentication 2522 * handshake or if we're initiating an authentication 2523 * request and configured to use shared key. 2524 */ 2525 is_shared_key = has_challenge || 2526 arg >= IEEE80211_AUTH_SHARED_RESPONSE || 2527 (arg == IEEE80211_AUTH_SHARED_REQUEST && 2528 bss->ni_authmode == IEEE80211_AUTH_SHARED); 2529 2530 m = ieee80211_getmgtframe(&frm, 2531 ic->ic_headroom + sizeof(struct ieee80211_frame), 2532 3 * sizeof(uint16_t) 2533 + (has_challenge && status == IEEE80211_STATUS_SUCCESS ? 2534 sizeof(uint16_t)+IEEE80211_CHALLENGE_LEN : 0) 2535 ); 2536 if (m == NULL) 2537 senderr(ENOMEM, is_tx_nobuf); 2538 2539 ((uint16_t *)frm)[0] = 2540 (is_shared_key) ? htole16(IEEE80211_AUTH_ALG_SHARED) 2541 : htole16(IEEE80211_AUTH_ALG_OPEN); 2542 ((uint16_t *)frm)[1] = htole16(arg); /* sequence number */ 2543 ((uint16_t *)frm)[2] = htole16(status);/* status */ 2544 2545 if (has_challenge && status == IEEE80211_STATUS_SUCCESS) { 2546 ((uint16_t *)frm)[3] = 2547 htole16((IEEE80211_CHALLENGE_LEN << 8) | 2548 IEEE80211_ELEMID_CHALLENGE); 2549 memcpy(&((uint16_t *)frm)[4], ni->ni_challenge, 2550 IEEE80211_CHALLENGE_LEN); 2551 m->m_pkthdr.len = m->m_len = 2552 4 * sizeof(uint16_t) + IEEE80211_CHALLENGE_LEN; 2553 if (arg == IEEE80211_AUTH_SHARED_RESPONSE) { 2554 IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni, 2555 "request encrypt frame (%s)", __func__); 2556 /* mark frame for encryption */ 2557 params.ibp_flags |= IEEE80211_BPF_CRYPTO; 2558 } 2559 } else 2560 m->m_pkthdr.len = m->m_len = 3 * sizeof(uint16_t); 2561 2562 /* XXX not right for shared key */ 2563 if (status == IEEE80211_STATUS_SUCCESS) 2564 IEEE80211_NODE_STAT(ni, tx_auth); 2565 else 2566 IEEE80211_NODE_STAT(ni, tx_auth_fail); 2567 2568 if (vap->iv_opmode == IEEE80211_M_STA) 2569 ieee80211_add_callback(m, ieee80211_tx_mgt_cb, 2570 (void *) vap->iv_state); 2571 break; 2572 2573 case IEEE80211_FC0_SUBTYPE_DEAUTH: 2574 IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni, 2575 "send station deauthenticate (reason: %d (%s))", arg, 2576 ieee80211_reason_to_string(arg)); 2577 m = ieee80211_getmgtframe(&frm, 2578 ic->ic_headroom + sizeof(struct ieee80211_frame), 2579 sizeof(uint16_t)); 2580 if (m == NULL) 2581 senderr(ENOMEM, is_tx_nobuf); 2582 *(uint16_t *)frm = htole16(arg); /* reason */ 2583 m->m_pkthdr.len = m->m_len = sizeof(uint16_t); 2584 2585 IEEE80211_NODE_STAT(ni, tx_deauth); 2586 IEEE80211_NODE_STAT_SET(ni, tx_deauth_code, arg); 2587 2588 ieee80211_node_unauthorize(ni); /* port closed */ 2589 break; 2590 2591 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 2592 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 2593 /* 2594 * asreq frame format 2595 * [2] capability information 2596 * [2] listen interval 2597 * [6*] current AP address (reassoc only) 2598 * [tlv] ssid 2599 * [tlv] supported rates 2600 * [tlv] extended supported rates 2601 * [4] power capability (optional) 2602 * [28] supported channels (optional) 2603 * [tlv] HT capabilities 2604 * [tlv] VHT capabilities 2605 * [tlv] WME (optional) 2606 * [tlv] Vendor OUI HT capabilities (optional) 2607 * [tlv] Atheros capabilities (if negotiated) 2608 * [tlv] AppIE's (optional) 2609 */ 2610 m = ieee80211_getmgtframe(&frm, 2611 ic->ic_headroom + sizeof(struct ieee80211_frame), 2612 sizeof(uint16_t) 2613 + sizeof(uint16_t) 2614 + IEEE80211_ADDR_LEN 2615 + 2 + IEEE80211_NWID_LEN 2616 + 2 + IEEE80211_RATE_SIZE 2617 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2618 + 4 2619 + 2 + 26 2620 + sizeof(struct ieee80211_wme_info) 2621 + sizeof(struct ieee80211_ie_htcap) 2622 + sizeof(struct ieee80211_ie_vhtcap) 2623 + 4 + sizeof(struct ieee80211_ie_htcap) 2624 #ifdef IEEE80211_SUPPORT_SUPERG 2625 + sizeof(struct ieee80211_ath_ie) 2626 #endif 2627 + (vap->iv_appie_wpa != NULL ? 2628 vap->iv_appie_wpa->ie_len : 0) 2629 + (vap->iv_appie_assocreq != NULL ? 2630 vap->iv_appie_assocreq->ie_len : 0) 2631 ); 2632 if (m == NULL) 2633 senderr(ENOMEM, is_tx_nobuf); 2634 2635 KASSERT(vap->iv_opmode == IEEE80211_M_STA, 2636 ("wrong mode %u", vap->iv_opmode)); 2637 capinfo = IEEE80211_CAPINFO_ESS; 2638 if (vap->iv_flags & IEEE80211_F_PRIVACY) 2639 capinfo |= IEEE80211_CAPINFO_PRIVACY; 2640 /* 2641 * NB: Some 11a AP's reject the request when 2642 * short preamble is set. 2643 */ 2644 if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && 2645 IEEE80211_IS_CHAN_2GHZ(ic->ic_curchan)) 2646 capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE; 2647 if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 2648 (ic->ic_caps & IEEE80211_C_SHSLOT)) 2649 capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME; 2650 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SPECTRUM_MGMT) && 2651 (vap->iv_flags & IEEE80211_F_DOTH)) 2652 capinfo |= IEEE80211_CAPINFO_SPECTRUM_MGMT; 2653 *(uint16_t *)frm = htole16(capinfo); 2654 frm += 2; 2655 2656 KASSERT(bss->ni_intval != 0, ("beacon interval is zero!")); 2657 *(uint16_t *)frm = htole16(howmany(ic->ic_lintval, 2658 bss->ni_intval)); 2659 frm += 2; 2660 2661 if (type == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) { 2662 IEEE80211_ADDR_COPY(frm, bss->ni_bssid); 2663 frm += IEEE80211_ADDR_LEN; 2664 } 2665 2666 frm = ieee80211_add_ssid(frm, ni->ni_essid, ni->ni_esslen); 2667 frm = ieee80211_add_rates(frm, &ni->ni_rates); 2668 frm = ieee80211_add_rsn(frm, vap); 2669 frm = ieee80211_add_xrates(frm, &ni->ni_rates); 2670 if (capinfo & IEEE80211_CAPINFO_SPECTRUM_MGMT) { 2671 frm = ieee80211_add_powercapability(frm, 2672 ic->ic_curchan); 2673 frm = ieee80211_add_supportedchannels(frm, ic); 2674 } 2675 2676 /* 2677 * Check the channel - we may be using an 11n NIC with an 2678 * 11n capable station, but we're configured to be an 11b 2679 * channel. 2680 */ 2681 if ((vap->iv_flags_ht & IEEE80211_FHT_HT) && 2682 IEEE80211_IS_CHAN_HT(ni->ni_chan) && 2683 ni->ni_ies.htcap_ie != NULL && 2684 ni->ni_ies.htcap_ie[0] == IEEE80211_ELEMID_HTCAP) { 2685 frm = ieee80211_add_htcap(frm, ni); 2686 } 2687 2688 if ((vap->iv_flags_vht & IEEE80211_FVHT_VHT) && 2689 IEEE80211_IS_CHAN_VHT(ni->ni_chan) && 2690 ni->ni_ies.vhtcap_ie != NULL && 2691 ni->ni_ies.vhtcap_ie[0] == IEEE80211_ELEMID_VHT_CAP) { 2692 frm = ieee80211_add_vhtcap(frm, ni); 2693 } 2694 2695 frm = ieee80211_add_wpa(frm, vap); 2696 if ((ic->ic_flags & IEEE80211_F_WME) && 2697 ni->ni_ies.wme_ie != NULL) 2698 frm = ieee80211_add_wme_info(frm, &ic->ic_wme); 2699 2700 /* 2701 * Same deal - only send HT info if we're on an 11n 2702 * capable channel. 2703 */ 2704 if ((vap->iv_flags_ht & IEEE80211_FHT_HT) && 2705 IEEE80211_IS_CHAN_HT(ni->ni_chan) && 2706 ni->ni_ies.htcap_ie != NULL && 2707 ni->ni_ies.htcap_ie[0] == IEEE80211_ELEMID_VENDOR) { 2708 frm = ieee80211_add_htcap_vendor(frm, ni); 2709 } 2710 #ifdef IEEE80211_SUPPORT_SUPERG 2711 if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS)) { 2712 frm = ieee80211_add_ath(frm, 2713 IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS), 2714 ((vap->iv_flags & IEEE80211_F_WPA) == 0 && 2715 ni->ni_authmode != IEEE80211_AUTH_8021X) ? 2716 vap->iv_def_txkey : IEEE80211_KEYIX_NONE); 2717 } 2718 #endif /* IEEE80211_SUPPORT_SUPERG */ 2719 if (vap->iv_appie_assocreq != NULL) 2720 frm = add_appie(frm, vap->iv_appie_assocreq); 2721 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2722 2723 ieee80211_add_callback(m, ieee80211_tx_mgt_cb, 2724 (void *) vap->iv_state); 2725 break; 2726 2727 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 2728 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 2729 /* 2730 * asresp frame format 2731 * [2] capability information 2732 * [2] status 2733 * [2] association ID 2734 * [tlv] supported rates 2735 * [tlv] extended supported rates 2736 * [tlv] HT capabilities (standard, if STA enabled) 2737 * [tlv] HT information (standard, if STA enabled) 2738 * [tlv] VHT capabilities (standard, if STA enabled) 2739 * [tlv] VHT information (standard, if STA enabled) 2740 * [tlv] WME (if configured and STA enabled) 2741 * [tlv] HT capabilities (vendor OUI, if STA enabled) 2742 * [tlv] HT information (vendor OUI, if STA enabled) 2743 * [tlv] Atheros capabilities (if STA enabled) 2744 * [tlv] AppIE's (optional) 2745 */ 2746 m = ieee80211_getmgtframe(&frm, 2747 ic->ic_headroom + sizeof(struct ieee80211_frame), 2748 sizeof(uint16_t) 2749 + sizeof(uint16_t) 2750 + sizeof(uint16_t) 2751 + 2 + IEEE80211_RATE_SIZE 2752 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2753 + sizeof(struct ieee80211_ie_htcap) + 4 2754 + sizeof(struct ieee80211_ie_htinfo) + 4 2755 + sizeof(struct ieee80211_ie_vhtcap) 2756 + sizeof(struct ieee80211_ie_vht_operation) 2757 + sizeof(struct ieee80211_wme_param) 2758 #ifdef IEEE80211_SUPPORT_SUPERG 2759 + sizeof(struct ieee80211_ath_ie) 2760 #endif 2761 + (vap->iv_appie_assocresp != NULL ? 2762 vap->iv_appie_assocresp->ie_len : 0) 2763 ); 2764 if (m == NULL) 2765 senderr(ENOMEM, is_tx_nobuf); 2766 2767 capinfo = ieee80211_getcapinfo(vap, bss->ni_chan); 2768 *(uint16_t *)frm = htole16(capinfo); 2769 frm += 2; 2770 2771 *(uint16_t *)frm = htole16(arg); /* status */ 2772 frm += 2; 2773 2774 if (arg == IEEE80211_STATUS_SUCCESS) { 2775 *(uint16_t *)frm = htole16(ni->ni_associd); 2776 IEEE80211_NODE_STAT(ni, tx_assoc); 2777 } else 2778 IEEE80211_NODE_STAT(ni, tx_assoc_fail); 2779 frm += 2; 2780 2781 frm = ieee80211_add_rates(frm, &ni->ni_rates); 2782 frm = ieee80211_add_xrates(frm, &ni->ni_rates); 2783 /* NB: respond according to what we received */ 2784 if ((ni->ni_flags & HTFLAGS) == IEEE80211_NODE_HT) { 2785 frm = ieee80211_add_htcap(frm, ni); 2786 frm = ieee80211_add_htinfo(frm, ni); 2787 } 2788 if ((vap->iv_flags & IEEE80211_F_WME) && 2789 ni->ni_ies.wme_ie != NULL) 2790 frm = ieee80211_add_wme_param(frm, &ic->ic_wme); 2791 if ((ni->ni_flags & HTFLAGS) == HTFLAGS) { 2792 frm = ieee80211_add_htcap_vendor(frm, ni); 2793 frm = ieee80211_add_htinfo_vendor(frm, ni); 2794 } 2795 if (ni->ni_flags & IEEE80211_NODE_VHT) { 2796 frm = ieee80211_add_vhtcap(frm, ni); 2797 frm = ieee80211_add_vhtinfo(frm, ni); 2798 } 2799 #ifdef IEEE80211_SUPPORT_SUPERG 2800 if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS)) 2801 frm = ieee80211_add_ath(frm, 2802 IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS), 2803 ((vap->iv_flags & IEEE80211_F_WPA) == 0 && 2804 ni->ni_authmode != IEEE80211_AUTH_8021X) ? 2805 vap->iv_def_txkey : IEEE80211_KEYIX_NONE); 2806 #endif /* IEEE80211_SUPPORT_SUPERG */ 2807 if (vap->iv_appie_assocresp != NULL) 2808 frm = add_appie(frm, vap->iv_appie_assocresp); 2809 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2810 break; 2811 2812 case IEEE80211_FC0_SUBTYPE_DISASSOC: 2813 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 2814 "send station disassociate (reason: %d (%s))", arg, 2815 ieee80211_reason_to_string(arg)); 2816 m = ieee80211_getmgtframe(&frm, 2817 ic->ic_headroom + sizeof(struct ieee80211_frame), 2818 sizeof(uint16_t)); 2819 if (m == NULL) 2820 senderr(ENOMEM, is_tx_nobuf); 2821 *(uint16_t *)frm = htole16(arg); /* reason */ 2822 m->m_pkthdr.len = m->m_len = sizeof(uint16_t); 2823 2824 IEEE80211_NODE_STAT(ni, tx_disassoc); 2825 IEEE80211_NODE_STAT_SET(ni, tx_disassoc_code, arg); 2826 break; 2827 2828 default: 2829 IEEE80211_NOTE(vap, IEEE80211_MSG_ANY, ni, 2830 "invalid mgmt frame type %u", type); 2831 senderr(EINVAL, is_tx_unknownmgt); 2832 /* NOTREACHED */ 2833 } 2834 2835 /* NB: force non-ProbeResp frames to the highest queue */ 2836 params.ibp_pri = WME_AC_VO; 2837 params.ibp_rate0 = bss->ni_txparms->mgmtrate; 2838 /* NB: we know all frames are unicast */ 2839 params.ibp_try0 = bss->ni_txparms->maxretry; 2840 params.ibp_power = bss->ni_txpower; 2841 return ieee80211_mgmt_output(ni, m, type, ¶ms); 2842 bad: 2843 ieee80211_free_node(ni); 2844 return ret; 2845 #undef senderr 2846 #undef HTFLAGS 2847 } 2848 2849 /* 2850 * Return an mbuf with a probe response frame in it. 2851 * Space is left to prepend and 802.11 header at the 2852 * front but it's left to the caller to fill in. 2853 */ 2854 struct mbuf * 2855 ieee80211_alloc_proberesp(struct ieee80211_node *bss, int legacy) 2856 { 2857 struct ieee80211vap *vap = bss->ni_vap; 2858 struct ieee80211com *ic = bss->ni_ic; 2859 const struct ieee80211_rateset *rs; 2860 struct mbuf *m; 2861 uint16_t capinfo; 2862 uint8_t *frm; 2863 2864 /* 2865 * probe response frame format 2866 * [8] time stamp 2867 * [2] beacon interval 2868 * [2] cabability information 2869 * [tlv] ssid 2870 * [tlv] supported rates 2871 * [tlv] parameter set (FH/DS) 2872 * [tlv] parameter set (IBSS) 2873 * [tlv] country (optional) 2874 * [3] power control (optional) 2875 * [5] channel switch announcement (CSA) (optional) 2876 * [tlv] extended rate phy (ERP) 2877 * [tlv] extended supported rates 2878 * [tlv] RSN (optional) 2879 * [tlv] HT capabilities 2880 * [tlv] HT information 2881 * [tlv] VHT capabilities 2882 * [tlv] VHT information 2883 * [tlv] WPA (optional) 2884 * [tlv] WME (optional) 2885 * [tlv] Vendor OUI HT capabilities (optional) 2886 * [tlv] Vendor OUI HT information (optional) 2887 * [tlv] Atheros capabilities 2888 * [tlv] AppIE's (optional) 2889 * [tlv] Mesh ID (MBSS) 2890 * [tlv] Mesh Conf (MBSS) 2891 */ 2892 m = ieee80211_getmgtframe(&frm, 2893 ic->ic_headroom + sizeof(struct ieee80211_frame), 2894 8 2895 + sizeof(uint16_t) 2896 + sizeof(uint16_t) 2897 + 2 + IEEE80211_NWID_LEN 2898 + 2 + IEEE80211_RATE_SIZE 2899 + 7 /* max(7,3) */ 2900 + IEEE80211_COUNTRY_MAX_SIZE 2901 + 3 2902 + sizeof(struct ieee80211_csa_ie) 2903 + sizeof(struct ieee80211_quiet_ie) 2904 + 3 2905 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2906 + sizeof(struct ieee80211_ie_wpa) 2907 + sizeof(struct ieee80211_ie_htcap) 2908 + sizeof(struct ieee80211_ie_htinfo) 2909 + sizeof(struct ieee80211_ie_wpa) 2910 + sizeof(struct ieee80211_wme_param) 2911 + 4 + sizeof(struct ieee80211_ie_htcap) 2912 + 4 + sizeof(struct ieee80211_ie_htinfo) 2913 + sizeof(struct ieee80211_ie_vhtcap) 2914 + sizeof(struct ieee80211_ie_vht_operation) 2915 #ifdef IEEE80211_SUPPORT_SUPERG 2916 + sizeof(struct ieee80211_ath_ie) 2917 #endif 2918 #ifdef IEEE80211_SUPPORT_MESH 2919 + 2 + IEEE80211_MESHID_LEN 2920 + sizeof(struct ieee80211_meshconf_ie) 2921 #endif 2922 + (vap->iv_appie_proberesp != NULL ? 2923 vap->iv_appie_proberesp->ie_len : 0) 2924 ); 2925 if (m == NULL) { 2926 vap->iv_stats.is_tx_nobuf++; 2927 return NULL; 2928 } 2929 2930 memset(frm, 0, 8); /* timestamp should be filled later */ 2931 frm += 8; 2932 *(uint16_t *)frm = htole16(bss->ni_intval); 2933 frm += 2; 2934 capinfo = ieee80211_getcapinfo(vap, bss->ni_chan); 2935 *(uint16_t *)frm = htole16(capinfo); 2936 frm += 2; 2937 2938 frm = ieee80211_add_ssid(frm, bss->ni_essid, bss->ni_esslen); 2939 rs = ieee80211_get_suprates(ic, bss->ni_chan); 2940 frm = ieee80211_add_rates(frm, rs); 2941 2942 if (IEEE80211_IS_CHAN_FHSS(bss->ni_chan)) { 2943 *frm++ = IEEE80211_ELEMID_FHPARMS; 2944 *frm++ = 5; 2945 *frm++ = bss->ni_fhdwell & 0x00ff; 2946 *frm++ = (bss->ni_fhdwell >> 8) & 0x00ff; 2947 *frm++ = IEEE80211_FH_CHANSET( 2948 ieee80211_chan2ieee(ic, bss->ni_chan)); 2949 *frm++ = IEEE80211_FH_CHANPAT( 2950 ieee80211_chan2ieee(ic, bss->ni_chan)); 2951 *frm++ = bss->ni_fhindex; 2952 } else { 2953 *frm++ = IEEE80211_ELEMID_DSPARMS; 2954 *frm++ = 1; 2955 *frm++ = ieee80211_chan2ieee(ic, bss->ni_chan); 2956 } 2957 2958 if (vap->iv_opmode == IEEE80211_M_IBSS) { 2959 *frm++ = IEEE80211_ELEMID_IBSSPARMS; 2960 *frm++ = 2; 2961 *frm++ = 0; *frm++ = 0; /* TODO: ATIM window */ 2962 } 2963 if ((vap->iv_flags & IEEE80211_F_DOTH) || 2964 (vap->iv_flags_ext & IEEE80211_FEXT_DOTD)) 2965 frm = ieee80211_add_countryie(frm, ic); 2966 if (vap->iv_flags & IEEE80211_F_DOTH) { 2967 if (IEEE80211_IS_CHAN_5GHZ(bss->ni_chan)) 2968 frm = ieee80211_add_powerconstraint(frm, vap); 2969 if (ic->ic_flags & IEEE80211_F_CSAPENDING) 2970 frm = ieee80211_add_csa(frm, vap); 2971 } 2972 if (vap->iv_flags & IEEE80211_F_DOTH) { 2973 if (IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) && 2974 (vap->iv_flags_ext & IEEE80211_FEXT_DFS)) { 2975 if (vap->iv_quiet) 2976 frm = ieee80211_add_quiet(frm, vap, 0); 2977 } 2978 } 2979 if (IEEE80211_IS_CHAN_ANYG(bss->ni_chan)) 2980 frm = ieee80211_add_erp(frm, ic); 2981 frm = ieee80211_add_xrates(frm, rs); 2982 frm = ieee80211_add_rsn(frm, vap); 2983 /* 2984 * NB: legacy 11b clients do not get certain ie's. 2985 * The caller identifies such clients by passing 2986 * a token in legacy to us. Could expand this to be 2987 * any legacy client for stuff like HT ie's. 2988 */ 2989 if (IEEE80211_IS_CHAN_HT(bss->ni_chan) && 2990 legacy != IEEE80211_SEND_LEGACY_11B) { 2991 frm = ieee80211_add_htcap(frm, bss); 2992 frm = ieee80211_add_htinfo(frm, bss); 2993 } 2994 if (IEEE80211_IS_CHAN_VHT(bss->ni_chan) && 2995 legacy != IEEE80211_SEND_LEGACY_11B) { 2996 frm = ieee80211_add_vhtcap(frm, bss); 2997 frm = ieee80211_add_vhtinfo(frm, bss); 2998 } 2999 frm = ieee80211_add_wpa(frm, vap); 3000 if (vap->iv_flags & IEEE80211_F_WME) 3001 frm = ieee80211_add_wme_param(frm, &ic->ic_wme); 3002 if (IEEE80211_IS_CHAN_HT(bss->ni_chan) && 3003 (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) && 3004 legacy != IEEE80211_SEND_LEGACY_11B) { 3005 frm = ieee80211_add_htcap_vendor(frm, bss); 3006 frm = ieee80211_add_htinfo_vendor(frm, bss); 3007 } 3008 #ifdef IEEE80211_SUPPORT_SUPERG 3009 if ((vap->iv_flags & IEEE80211_F_ATHEROS) && 3010 legacy != IEEE80211_SEND_LEGACY_11B) 3011 frm = ieee80211_add_athcaps(frm, bss); 3012 #endif 3013 if (vap->iv_appie_proberesp != NULL) 3014 frm = add_appie(frm, vap->iv_appie_proberesp); 3015 #ifdef IEEE80211_SUPPORT_MESH 3016 if (vap->iv_opmode == IEEE80211_M_MBSS) { 3017 frm = ieee80211_add_meshid(frm, vap); 3018 frm = ieee80211_add_meshconf(frm, vap); 3019 } 3020 #endif 3021 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 3022 3023 return m; 3024 } 3025 3026 /* 3027 * Send a probe response frame to the specified mac address. 3028 * This does not go through the normal mgt frame api so we 3029 * can specify the destination address and re-use the bss node 3030 * for the sta reference. 3031 */ 3032 int 3033 ieee80211_send_proberesp(struct ieee80211vap *vap, 3034 const uint8_t da[IEEE80211_ADDR_LEN], int legacy) 3035 { 3036 struct ieee80211_node *bss = vap->iv_bss; 3037 struct ieee80211com *ic = vap->iv_ic; 3038 struct mbuf *m; 3039 int ret; 3040 3041 if (vap->iv_state == IEEE80211_S_CAC) { 3042 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, bss, 3043 "block %s frame in CAC state", "probe response"); 3044 vap->iv_stats.is_tx_badstate++; 3045 return EIO; /* XXX */ 3046 } 3047 3048 /* 3049 * Hold a reference on the node so it doesn't go away until after 3050 * the xmit is complete all the way in the driver. On error we 3051 * will remove our reference. 3052 */ 3053 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 3054 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", 3055 __func__, __LINE__, bss, ether_sprintf(bss->ni_macaddr), 3056 ieee80211_node_refcnt(bss)+1); 3057 ieee80211_ref_node(bss); 3058 3059 m = ieee80211_alloc_proberesp(bss, legacy); 3060 if (m == NULL) { 3061 ieee80211_free_node(bss); 3062 return ENOMEM; 3063 } 3064 3065 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); 3066 KASSERT(m != NULL, ("no room for header")); 3067 3068 IEEE80211_TX_LOCK(ic); 3069 ieee80211_send_setup(bss, m, 3070 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_RESP, 3071 IEEE80211_NONQOS_TID, vap->iv_myaddr, da, bss->ni_bssid); 3072 /* XXX power management? */ 3073 m->m_flags |= M_ENCAP; /* mark encapsulated */ 3074 3075 M_WME_SETAC(m, WME_AC_BE); 3076 3077 IEEE80211_DPRINTF(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS, 3078 "send probe resp on channel %u to %s%s\n", 3079 ieee80211_chan2ieee(ic, ic->ic_curchan), ether_sprintf(da), 3080 legacy ? " <legacy>" : ""); 3081 IEEE80211_NODE_STAT(bss, tx_mgmt); 3082 3083 ret = ieee80211_raw_output(vap, bss, m, NULL); 3084 IEEE80211_TX_UNLOCK(ic); 3085 return (ret); 3086 } 3087 3088 /* 3089 * Allocate and build a RTS (Request To Send) control frame. 3090 */ 3091 struct mbuf * 3092 ieee80211_alloc_rts(struct ieee80211com *ic, 3093 const uint8_t ra[IEEE80211_ADDR_LEN], 3094 const uint8_t ta[IEEE80211_ADDR_LEN], 3095 uint16_t dur) 3096 { 3097 struct ieee80211_frame_rts *rts; 3098 struct mbuf *m; 3099 3100 /* XXX honor ic_headroom */ 3101 m = m_gethdr(M_NOWAIT, MT_DATA); 3102 if (m != NULL) { 3103 rts = mtod(m, struct ieee80211_frame_rts *); 3104 rts->i_fc[0] = IEEE80211_FC0_VERSION_0 | 3105 IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_RTS; 3106 rts->i_fc[1] = IEEE80211_FC1_DIR_NODS; 3107 *(u_int16_t *)rts->i_dur = htole16(dur); 3108 IEEE80211_ADDR_COPY(rts->i_ra, ra); 3109 IEEE80211_ADDR_COPY(rts->i_ta, ta); 3110 3111 m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_rts); 3112 } 3113 return m; 3114 } 3115 3116 /* 3117 * Allocate and build a CTS (Clear To Send) control frame. 3118 */ 3119 struct mbuf * 3120 ieee80211_alloc_cts(struct ieee80211com *ic, 3121 const uint8_t ra[IEEE80211_ADDR_LEN], uint16_t dur) 3122 { 3123 struct ieee80211_frame_cts *cts; 3124 struct mbuf *m; 3125 3126 /* XXX honor ic_headroom */ 3127 m = m_gethdr(M_NOWAIT, MT_DATA); 3128 if (m != NULL) { 3129 cts = mtod(m, struct ieee80211_frame_cts *); 3130 cts->i_fc[0] = IEEE80211_FC0_VERSION_0 | 3131 IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_CTS; 3132 cts->i_fc[1] = IEEE80211_FC1_DIR_NODS; 3133 *(u_int16_t *)cts->i_dur = htole16(dur); 3134 IEEE80211_ADDR_COPY(cts->i_ra, ra); 3135 3136 m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_cts); 3137 } 3138 return m; 3139 } 3140 3141 /* 3142 * Wrapper for CTS/RTS frame allocation. 3143 */ 3144 struct mbuf * 3145 ieee80211_alloc_prot(struct ieee80211_node *ni, const struct mbuf *m, 3146 uint8_t rate, int prot) 3147 { 3148 struct ieee80211com *ic = ni->ni_ic; 3149 const struct ieee80211_frame *wh; 3150 struct mbuf *mprot; 3151 uint16_t dur; 3152 int pktlen, isshort; 3153 3154 KASSERT(prot == IEEE80211_PROT_RTSCTS || 3155 prot == IEEE80211_PROT_CTSONLY, 3156 ("wrong protection type %d", prot)); 3157 3158 wh = mtod(m, const struct ieee80211_frame *); 3159 pktlen = m->m_pkthdr.len + IEEE80211_CRC_LEN; 3160 isshort = (ic->ic_flags & IEEE80211_F_SHPREAMBLE) != 0; 3161 dur = ieee80211_compute_duration(ic->ic_rt, pktlen, rate, isshort) 3162 + ieee80211_ack_duration(ic->ic_rt, rate, isshort); 3163 3164 if (prot == IEEE80211_PROT_RTSCTS) { 3165 /* NB: CTS is the same size as an ACK */ 3166 dur += ieee80211_ack_duration(ic->ic_rt, rate, isshort); 3167 mprot = ieee80211_alloc_rts(ic, wh->i_addr1, wh->i_addr2, dur); 3168 } else 3169 mprot = ieee80211_alloc_cts(ic, ni->ni_vap->iv_myaddr, dur); 3170 3171 return (mprot); 3172 } 3173 3174 static void 3175 ieee80211_tx_mgt_timeout(void *arg) 3176 { 3177 struct ieee80211vap *vap = arg; 3178 3179 IEEE80211_LOCK(vap->iv_ic); 3180 if (vap->iv_state != IEEE80211_S_INIT && 3181 (vap->iv_ic->ic_flags & IEEE80211_F_SCAN) == 0) { 3182 /* 3183 * NB: it's safe to specify a timeout as the reason here; 3184 * it'll only be used in the right state. 3185 */ 3186 ieee80211_new_state_locked(vap, IEEE80211_S_SCAN, 3187 IEEE80211_SCAN_FAIL_TIMEOUT); 3188 } 3189 IEEE80211_UNLOCK(vap->iv_ic); 3190 } 3191 3192 /* 3193 * This is the callback set on net80211-sourced transmitted 3194 * authentication request frames. 3195 * 3196 * This does a couple of things: 3197 * 3198 * + If the frame transmitted was a success, it schedules a future 3199 * event which will transition the interface to scan. 3200 * If a state transition _then_ occurs before that event occurs, 3201 * said state transition will cancel this callout. 3202 * 3203 * + If the frame transmit was a failure, it immediately schedules 3204 * the transition back to scan. 3205 */ 3206 static void 3207 ieee80211_tx_mgt_cb(struct ieee80211_node *ni, void *arg, int status) 3208 { 3209 struct ieee80211vap *vap = ni->ni_vap; 3210 enum ieee80211_state ostate = (enum ieee80211_state) arg; 3211 3212 /* 3213 * Frame transmit completed; arrange timer callback. If 3214 * transmit was successfully we wait for response. Otherwise 3215 * we arrange an immediate callback instead of doing the 3216 * callback directly since we don't know what state the driver 3217 * is in (e.g. what locks it is holding). This work should 3218 * not be too time-critical and not happen too often so the 3219 * added overhead is acceptable. 3220 * 3221 * XXX what happens if !acked but response shows up before callback? 3222 */ 3223 if (vap->iv_state == ostate) { 3224 callout_reset(&vap->iv_mgtsend, 3225 status == 0 ? IEEE80211_TRANS_WAIT*hz : 0, 3226 ieee80211_tx_mgt_timeout, vap); 3227 } 3228 } 3229 3230 static void 3231 ieee80211_beacon_construct(struct mbuf *m, uint8_t *frm, 3232 struct ieee80211_node *ni) 3233 { 3234 struct ieee80211vap *vap = ni->ni_vap; 3235 struct ieee80211_beacon_offsets *bo = &vap->iv_bcn_off; 3236 struct ieee80211com *ic = ni->ni_ic; 3237 struct ieee80211_rateset *rs = &ni->ni_rates; 3238 uint16_t capinfo; 3239 3240 /* 3241 * beacon frame format 3242 * 3243 * TODO: update to 802.11-2012; a lot of stuff has changed; 3244 * vendor extensions should be at the end, etc. 3245 * 3246 * [8] time stamp 3247 * [2] beacon interval 3248 * [2] cabability information 3249 * [tlv] ssid 3250 * [tlv] supported rates 3251 * [3] parameter set (DS) 3252 * [8] CF parameter set (optional) 3253 * [tlv] parameter set (IBSS/TIM) 3254 * [tlv] country (optional) 3255 * [3] power control (optional) 3256 * [5] channel switch announcement (CSA) (optional) 3257 * XXX TODO: Quiet 3258 * XXX TODO: IBSS DFS 3259 * XXX TODO: TPC report 3260 * [tlv] extended rate phy (ERP) 3261 * [tlv] extended supported rates 3262 * [tlv] RSN parameters 3263 * XXX TODO: BSSLOAD 3264 * (XXX EDCA parameter set, QoS capability?) 3265 * XXX TODO: AP channel report 3266 * 3267 * [tlv] HT capabilities 3268 * [tlv] HT information 3269 * XXX TODO: 20/40 BSS coexistence 3270 * Mesh: 3271 * XXX TODO: Meshid 3272 * XXX TODO: mesh config 3273 * XXX TODO: mesh awake window 3274 * XXX TODO: beacon timing (mesh, etc) 3275 * XXX TODO: MCCAOP Advertisement Overview 3276 * XXX TODO: MCCAOP Advertisement 3277 * XXX TODO: Mesh channel switch parameters 3278 * VHT: 3279 * XXX TODO: VHT capabilities 3280 * XXX TODO: VHT operation 3281 * XXX TODO: VHT transmit power envelope 3282 * XXX TODO: channel switch wrapper element 3283 * XXX TODO: extended BSS load element 3284 * 3285 * XXX Vendor-specific OIDs (e.g. Atheros) 3286 * [tlv] WPA parameters 3287 * [tlv] WME parameters 3288 * [tlv] Vendor OUI HT capabilities (optional) 3289 * [tlv] Vendor OUI HT information (optional) 3290 * [tlv] Atheros capabilities (optional) 3291 * [tlv] TDMA parameters (optional) 3292 * [tlv] Mesh ID (MBSS) 3293 * [tlv] Mesh Conf (MBSS) 3294 * [tlv] application data (optional) 3295 */ 3296 3297 memset(bo, 0, sizeof(*bo)); 3298 3299 memset(frm, 0, 8); /* XXX timestamp is set by hardware/driver */ 3300 frm += 8; 3301 *(uint16_t *)frm = htole16(ni->ni_intval); 3302 frm += 2; 3303 capinfo = ieee80211_getcapinfo(vap, ni->ni_chan); 3304 bo->bo_caps = (uint16_t *)frm; 3305 *(uint16_t *)frm = htole16(capinfo); 3306 frm += 2; 3307 *frm++ = IEEE80211_ELEMID_SSID; 3308 if ((vap->iv_flags & IEEE80211_F_HIDESSID) == 0) { 3309 *frm++ = ni->ni_esslen; 3310 memcpy(frm, ni->ni_essid, ni->ni_esslen); 3311 frm += ni->ni_esslen; 3312 } else 3313 *frm++ = 0; 3314 frm = ieee80211_add_rates(frm, rs); 3315 if (!IEEE80211_IS_CHAN_FHSS(ni->ni_chan)) { 3316 *frm++ = IEEE80211_ELEMID_DSPARMS; 3317 *frm++ = 1; 3318 *frm++ = ieee80211_chan2ieee(ic, ni->ni_chan); 3319 } 3320 if (ic->ic_flags & IEEE80211_F_PCF) { 3321 bo->bo_cfp = frm; 3322 frm = ieee80211_add_cfparms(frm, ic); 3323 } 3324 bo->bo_tim = frm; 3325 if (vap->iv_opmode == IEEE80211_M_IBSS) { 3326 *frm++ = IEEE80211_ELEMID_IBSSPARMS; 3327 *frm++ = 2; 3328 *frm++ = 0; *frm++ = 0; /* TODO: ATIM window */ 3329 bo->bo_tim_len = 0; 3330 } else if (vap->iv_opmode == IEEE80211_M_HOSTAP || 3331 vap->iv_opmode == IEEE80211_M_MBSS) { 3332 /* TIM IE is the same for Mesh and Hostap */ 3333 struct ieee80211_tim_ie *tie = (struct ieee80211_tim_ie *) frm; 3334 3335 tie->tim_ie = IEEE80211_ELEMID_TIM; 3336 tie->tim_len = 4; /* length */ 3337 tie->tim_count = 0; /* DTIM count */ 3338 tie->tim_period = vap->iv_dtim_period; /* DTIM period */ 3339 tie->tim_bitctl = 0; /* bitmap control */ 3340 tie->tim_bitmap[0] = 0; /* Partial Virtual Bitmap */ 3341 frm += sizeof(struct ieee80211_tim_ie); 3342 bo->bo_tim_len = 1; 3343 } 3344 bo->bo_tim_trailer = frm; 3345 if ((vap->iv_flags & IEEE80211_F_DOTH) || 3346 (vap->iv_flags_ext & IEEE80211_FEXT_DOTD)) 3347 frm = ieee80211_add_countryie(frm, ic); 3348 if (vap->iv_flags & IEEE80211_F_DOTH) { 3349 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 3350 frm = ieee80211_add_powerconstraint(frm, vap); 3351 bo->bo_csa = frm; 3352 if (ic->ic_flags & IEEE80211_F_CSAPENDING) 3353 frm = ieee80211_add_csa(frm, vap); 3354 } else 3355 bo->bo_csa = frm; 3356 3357 bo->bo_quiet = NULL; 3358 if (vap->iv_flags & IEEE80211_F_DOTH) { 3359 if (IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) && 3360 (vap->iv_flags_ext & IEEE80211_FEXT_DFS) && 3361 (vap->iv_quiet == 1)) { 3362 /* 3363 * We only insert the quiet IE offset if 3364 * the quiet IE is enabled. Otherwise don't 3365 * put it here or we'll just overwrite 3366 * some other beacon contents. 3367 */ 3368 if (vap->iv_quiet) { 3369 bo->bo_quiet = frm; 3370 frm = ieee80211_add_quiet(frm,vap, 0); 3371 } 3372 } 3373 } 3374 3375 if (IEEE80211_IS_CHAN_ANYG(ni->ni_chan)) { 3376 bo->bo_erp = frm; 3377 frm = ieee80211_add_erp(frm, ic); 3378 } 3379 frm = ieee80211_add_xrates(frm, rs); 3380 frm = ieee80211_add_rsn(frm, vap); 3381 if (IEEE80211_IS_CHAN_HT(ni->ni_chan)) { 3382 frm = ieee80211_add_htcap(frm, ni); 3383 bo->bo_htinfo = frm; 3384 frm = ieee80211_add_htinfo(frm, ni); 3385 } 3386 3387 if (IEEE80211_IS_CHAN_VHT(ni->ni_chan)) { 3388 frm = ieee80211_add_vhtcap(frm, ni); 3389 bo->bo_vhtinfo = frm; 3390 frm = ieee80211_add_vhtinfo(frm, ni); 3391 /* Transmit power envelope */ 3392 /* Channel switch wrapper element */ 3393 /* Extended bss load element */ 3394 } 3395 3396 frm = ieee80211_add_wpa(frm, vap); 3397 if (vap->iv_flags & IEEE80211_F_WME) { 3398 bo->bo_wme = frm; 3399 frm = ieee80211_add_wme_param(frm, &ic->ic_wme); 3400 } 3401 if (IEEE80211_IS_CHAN_HT(ni->ni_chan) && 3402 (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT)) { 3403 frm = ieee80211_add_htcap_vendor(frm, ni); 3404 frm = ieee80211_add_htinfo_vendor(frm, ni); 3405 } 3406 3407 #ifdef IEEE80211_SUPPORT_SUPERG 3408 if (vap->iv_flags & IEEE80211_F_ATHEROS) { 3409 bo->bo_ath = frm; 3410 frm = ieee80211_add_athcaps(frm, ni); 3411 } 3412 #endif 3413 #ifdef IEEE80211_SUPPORT_TDMA 3414 if (vap->iv_caps & IEEE80211_C_TDMA) { 3415 bo->bo_tdma = frm; 3416 frm = ieee80211_add_tdma(frm, vap); 3417 } 3418 #endif 3419 if (vap->iv_appie_beacon != NULL) { 3420 bo->bo_appie = frm; 3421 bo->bo_appie_len = vap->iv_appie_beacon->ie_len; 3422 frm = add_appie(frm, vap->iv_appie_beacon); 3423 } 3424 3425 /* XXX TODO: move meshid/meshconf up to before vendor extensions? */ 3426 #ifdef IEEE80211_SUPPORT_MESH 3427 if (vap->iv_opmode == IEEE80211_M_MBSS) { 3428 frm = ieee80211_add_meshid(frm, vap); 3429 bo->bo_meshconf = frm; 3430 frm = ieee80211_add_meshconf(frm, vap); 3431 } 3432 #endif 3433 bo->bo_tim_trailer_len = frm - bo->bo_tim_trailer; 3434 bo->bo_csa_trailer_len = frm - bo->bo_csa; 3435 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 3436 } 3437 3438 /* 3439 * Allocate a beacon frame and fillin the appropriate bits. 3440 */ 3441 struct mbuf * 3442 ieee80211_beacon_alloc(struct ieee80211_node *ni) 3443 { 3444 struct ieee80211vap *vap = ni->ni_vap; 3445 struct ieee80211com *ic = ni->ni_ic; 3446 struct ifnet *ifp = vap->iv_ifp; 3447 struct ieee80211_frame *wh; 3448 struct mbuf *m; 3449 int pktlen; 3450 uint8_t *frm; 3451 3452 /* 3453 * Update the "We're putting the quiet IE in the beacon" state. 3454 */ 3455 if (vap->iv_quiet == 1) 3456 vap->iv_flags_ext |= IEEE80211_FEXT_QUIET_IE; 3457 else if (vap->iv_quiet == 0) 3458 vap->iv_flags_ext &= ~IEEE80211_FEXT_QUIET_IE; 3459 3460 /* 3461 * beacon frame format 3462 * 3463 * Note: This needs updating for 802.11-2012. 3464 * 3465 * [8] time stamp 3466 * [2] beacon interval 3467 * [2] cabability information 3468 * [tlv] ssid 3469 * [tlv] supported rates 3470 * [3] parameter set (DS) 3471 * [8] CF parameter set (optional) 3472 * [tlv] parameter set (IBSS/TIM) 3473 * [tlv] country (optional) 3474 * [3] power control (optional) 3475 * [5] channel switch announcement (CSA) (optional) 3476 * [tlv] extended rate phy (ERP) 3477 * [tlv] extended supported rates 3478 * [tlv] RSN parameters 3479 * [tlv] HT capabilities 3480 * [tlv] HT information 3481 * [tlv] VHT capabilities 3482 * [tlv] VHT operation 3483 * [tlv] Vendor OUI HT capabilities (optional) 3484 * [tlv] Vendor OUI HT information (optional) 3485 * XXX Vendor-specific OIDs (e.g. Atheros) 3486 * [tlv] WPA parameters 3487 * [tlv] WME parameters 3488 * [tlv] TDMA parameters (optional) 3489 * [tlv] Mesh ID (MBSS) 3490 * [tlv] Mesh Conf (MBSS) 3491 * [tlv] application data (optional) 3492 * NB: we allocate the max space required for the TIM bitmap. 3493 * XXX how big is this? 3494 */ 3495 pktlen = 8 /* time stamp */ 3496 + sizeof(uint16_t) /* beacon interval */ 3497 + sizeof(uint16_t) /* capabilities */ 3498 + 2 + ni->ni_esslen /* ssid */ 3499 + 2 + IEEE80211_RATE_SIZE /* supported rates */ 3500 + 2 + 1 /* DS parameters */ 3501 + 2 + 6 /* CF parameters */ 3502 + 2 + 4 + vap->iv_tim_len /* DTIM/IBSSPARMS */ 3503 + IEEE80211_COUNTRY_MAX_SIZE /* country */ 3504 + 2 + 1 /* power control */ 3505 + sizeof(struct ieee80211_csa_ie) /* CSA */ 3506 + sizeof(struct ieee80211_quiet_ie) /* Quiet */ 3507 + 2 + 1 /* ERP */ 3508 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 3509 + (vap->iv_caps & IEEE80211_C_WPA ? /* WPA 1+2 */ 3510 2*sizeof(struct ieee80211_ie_wpa) : 0) 3511 /* XXX conditional? */ 3512 + 4+2*sizeof(struct ieee80211_ie_htcap)/* HT caps */ 3513 + 4+2*sizeof(struct ieee80211_ie_htinfo)/* HT info */ 3514 + sizeof(struct ieee80211_ie_vhtcap)/* VHT caps */ 3515 + sizeof(struct ieee80211_ie_vht_operation)/* VHT info */ 3516 + (vap->iv_caps & IEEE80211_C_WME ? /* WME */ 3517 sizeof(struct ieee80211_wme_param) : 0) 3518 #ifdef IEEE80211_SUPPORT_SUPERG 3519 + sizeof(struct ieee80211_ath_ie) /* ATH */ 3520 #endif 3521 #ifdef IEEE80211_SUPPORT_TDMA 3522 + (vap->iv_caps & IEEE80211_C_TDMA ? /* TDMA */ 3523 sizeof(struct ieee80211_tdma_param) : 0) 3524 #endif 3525 #ifdef IEEE80211_SUPPORT_MESH 3526 + 2 + ni->ni_meshidlen 3527 + sizeof(struct ieee80211_meshconf_ie) 3528 #endif 3529 + IEEE80211_MAX_APPIE 3530 ; 3531 m = ieee80211_getmgtframe(&frm, 3532 ic->ic_headroom + sizeof(struct ieee80211_frame), pktlen); 3533 if (m == NULL) { 3534 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY, 3535 "%s: cannot get buf; size %u\n", __func__, pktlen); 3536 vap->iv_stats.is_tx_nobuf++; 3537 return NULL; 3538 } 3539 ieee80211_beacon_construct(m, frm, ni); 3540 3541 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); 3542 KASSERT(m != NULL, ("no space for 802.11 header?")); 3543 wh = mtod(m, struct ieee80211_frame *); 3544 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT | 3545 IEEE80211_FC0_SUBTYPE_BEACON; 3546 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 3547 *(uint16_t *)wh->i_dur = 0; 3548 IEEE80211_ADDR_COPY(wh->i_addr1, ifp->if_broadcastaddr); 3549 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); 3550 IEEE80211_ADDR_COPY(wh->i_addr3, ni->ni_bssid); 3551 *(uint16_t *)wh->i_seq = 0; 3552 3553 return m; 3554 } 3555 3556 /* 3557 * Update the dynamic parts of a beacon frame based on the current state. 3558 */ 3559 int 3560 ieee80211_beacon_update(struct ieee80211_node *ni, struct mbuf *m, int mcast) 3561 { 3562 struct ieee80211vap *vap = ni->ni_vap; 3563 struct ieee80211_beacon_offsets *bo = &vap->iv_bcn_off; 3564 struct ieee80211com *ic = ni->ni_ic; 3565 int len_changed = 0; 3566 uint16_t capinfo; 3567 struct ieee80211_frame *wh; 3568 ieee80211_seq seqno; 3569 3570 IEEE80211_LOCK(ic); 3571 /* 3572 * Handle 11h channel change when we've reached the count. 3573 * We must recalculate the beacon frame contents to account 3574 * for the new channel. Note we do this only for the first 3575 * vap that reaches this point; subsequent vaps just update 3576 * their beacon state to reflect the recalculated channel. 3577 */ 3578 if (isset(bo->bo_flags, IEEE80211_BEACON_CSA) && 3579 vap->iv_csa_count == ic->ic_csa_count) { 3580 vap->iv_csa_count = 0; 3581 /* 3582 * Effect channel change before reconstructing the beacon 3583 * frame contents as many places reference ni_chan. 3584 */ 3585 if (ic->ic_csa_newchan != NULL) 3586 ieee80211_csa_completeswitch(ic); 3587 /* 3588 * NB: ieee80211_beacon_construct clears all pending 3589 * updates in bo_flags so we don't need to explicitly 3590 * clear IEEE80211_BEACON_CSA. 3591 */ 3592 ieee80211_beacon_construct(m, 3593 mtod(m, uint8_t*) + sizeof(struct ieee80211_frame), ni); 3594 3595 /* XXX do WME aggressive mode processing? */ 3596 IEEE80211_UNLOCK(ic); 3597 return 1; /* just assume length changed */ 3598 } 3599 3600 /* 3601 * Handle the quiet time element being added and removed. 3602 * Again, for now we just cheat and reconstruct the whole 3603 * beacon - that way the gap is provided as appropriate. 3604 * 3605 * So, track whether we have already added the IE versus 3606 * whether we want to be adding the IE. 3607 */ 3608 if ((vap->iv_flags_ext & IEEE80211_FEXT_QUIET_IE) && 3609 (vap->iv_quiet == 0)) { 3610 /* 3611 * Quiet time beacon IE enabled, but it's disabled; 3612 * recalc 3613 */ 3614 vap->iv_flags_ext &= ~IEEE80211_FEXT_QUIET_IE; 3615 ieee80211_beacon_construct(m, 3616 mtod(m, uint8_t*) + sizeof(struct ieee80211_frame), ni); 3617 /* XXX do WME aggressive mode processing? */ 3618 IEEE80211_UNLOCK(ic); 3619 return 1; /* just assume length changed */ 3620 } 3621 3622 if (((vap->iv_flags_ext & IEEE80211_FEXT_QUIET_IE) == 0) && 3623 (vap->iv_quiet == 1)) { 3624 /* 3625 * Quiet time beacon IE disabled, but it's now enabled; 3626 * recalc 3627 */ 3628 vap->iv_flags_ext |= IEEE80211_FEXT_QUIET_IE; 3629 ieee80211_beacon_construct(m, 3630 mtod(m, uint8_t*) + sizeof(struct ieee80211_frame), ni); 3631 /* XXX do WME aggressive mode processing? */ 3632 IEEE80211_UNLOCK(ic); 3633 return 1; /* just assume length changed */ 3634 } 3635 3636 wh = mtod(m, struct ieee80211_frame *); 3637 3638 /* 3639 * XXX TODO Strictly speaking this should be incremented with the TX 3640 * lock held so as to serialise access to the non-qos TID sequence 3641 * number space. 3642 * 3643 * If the driver identifies it does its own TX seqno management then 3644 * we can skip this (and still not do the TX seqno.) 3645 */ 3646 seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]++; 3647 *(uint16_t *)&wh->i_seq[0] = 3648 htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); 3649 M_SEQNO_SET(m, seqno); 3650 3651 /* XXX faster to recalculate entirely or just changes? */ 3652 capinfo = ieee80211_getcapinfo(vap, ni->ni_chan); 3653 *bo->bo_caps = htole16(capinfo); 3654 3655 if (vap->iv_flags & IEEE80211_F_WME) { 3656 struct ieee80211_wme_state *wme = &ic->ic_wme; 3657 3658 /* 3659 * Check for aggressive mode change. When there is 3660 * significant high priority traffic in the BSS 3661 * throttle back BE traffic by using conservative 3662 * parameters. Otherwise BE uses aggressive params 3663 * to optimize performance of legacy/non-QoS traffic. 3664 */ 3665 if (wme->wme_flags & WME_F_AGGRMODE) { 3666 if (wme->wme_hipri_traffic > 3667 wme->wme_hipri_switch_thresh) { 3668 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 3669 "%s: traffic %u, disable aggressive mode\n", 3670 __func__, wme->wme_hipri_traffic); 3671 wme->wme_flags &= ~WME_F_AGGRMODE; 3672 ieee80211_wme_updateparams_locked(vap); 3673 wme->wme_hipri_traffic = 3674 wme->wme_hipri_switch_hysteresis; 3675 } else 3676 wme->wme_hipri_traffic = 0; 3677 } else { 3678 if (wme->wme_hipri_traffic <= 3679 wme->wme_hipri_switch_thresh) { 3680 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 3681 "%s: traffic %u, enable aggressive mode\n", 3682 __func__, wme->wme_hipri_traffic); 3683 wme->wme_flags |= WME_F_AGGRMODE; 3684 ieee80211_wme_updateparams_locked(vap); 3685 wme->wme_hipri_traffic = 0; 3686 } else 3687 wme->wme_hipri_traffic = 3688 wme->wme_hipri_switch_hysteresis; 3689 } 3690 if (isset(bo->bo_flags, IEEE80211_BEACON_WME)) { 3691 (void) ieee80211_add_wme_param(bo->bo_wme, wme); 3692 clrbit(bo->bo_flags, IEEE80211_BEACON_WME); 3693 } 3694 } 3695 3696 if (isset(bo->bo_flags, IEEE80211_BEACON_HTINFO)) { 3697 ieee80211_ht_update_beacon(vap, bo); 3698 clrbit(bo->bo_flags, IEEE80211_BEACON_HTINFO); 3699 } 3700 #ifdef IEEE80211_SUPPORT_TDMA 3701 if (vap->iv_caps & IEEE80211_C_TDMA) { 3702 /* 3703 * NB: the beacon is potentially updated every TBTT. 3704 */ 3705 ieee80211_tdma_update_beacon(vap, bo); 3706 } 3707 #endif 3708 #ifdef IEEE80211_SUPPORT_MESH 3709 if (vap->iv_opmode == IEEE80211_M_MBSS) 3710 ieee80211_mesh_update_beacon(vap, bo); 3711 #endif 3712 3713 if (vap->iv_opmode == IEEE80211_M_HOSTAP || 3714 vap->iv_opmode == IEEE80211_M_MBSS) { /* NB: no IBSS support*/ 3715 struct ieee80211_tim_ie *tie = 3716 (struct ieee80211_tim_ie *) bo->bo_tim; 3717 if (isset(bo->bo_flags, IEEE80211_BEACON_TIM)) { 3718 u_int timlen, timoff, i; 3719 /* 3720 * ATIM/DTIM needs updating. If it fits in the 3721 * current space allocated then just copy in the 3722 * new bits. Otherwise we need to move any trailing 3723 * data to make room. Note that we know there is 3724 * contiguous space because ieee80211_beacon_allocate 3725 * insures there is space in the mbuf to write a 3726 * maximal-size virtual bitmap (based on iv_max_aid). 3727 */ 3728 /* 3729 * Calculate the bitmap size and offset, copy any 3730 * trailer out of the way, and then copy in the 3731 * new bitmap and update the information element. 3732 * Note that the tim bitmap must contain at least 3733 * one byte and any offset must be even. 3734 */ 3735 if (vap->iv_ps_pending != 0) { 3736 timoff = 128; /* impossibly large */ 3737 for (i = 0; i < vap->iv_tim_len; i++) 3738 if (vap->iv_tim_bitmap[i]) { 3739 timoff = i &~ 1; 3740 break; 3741 } 3742 KASSERT(timoff != 128, ("tim bitmap empty!")); 3743 for (i = vap->iv_tim_len-1; i >= timoff; i--) 3744 if (vap->iv_tim_bitmap[i]) 3745 break; 3746 timlen = 1 + (i - timoff); 3747 } else { 3748 timoff = 0; 3749 timlen = 1; 3750 } 3751 3752 /* 3753 * TODO: validate this! 3754 */ 3755 if (timlen != bo->bo_tim_len) { 3756 /* copy up/down trailer */ 3757 int adjust = tie->tim_bitmap+timlen 3758 - bo->bo_tim_trailer; 3759 ovbcopy(bo->bo_tim_trailer, 3760 bo->bo_tim_trailer+adjust, 3761 bo->bo_tim_trailer_len); 3762 bo->bo_tim_trailer += adjust; 3763 bo->bo_erp += adjust; 3764 bo->bo_htinfo += adjust; 3765 bo->bo_vhtinfo += adjust; 3766 #ifdef IEEE80211_SUPPORT_SUPERG 3767 bo->bo_ath += adjust; 3768 #endif 3769 #ifdef IEEE80211_SUPPORT_TDMA 3770 bo->bo_tdma += adjust; 3771 #endif 3772 #ifdef IEEE80211_SUPPORT_MESH 3773 bo->bo_meshconf += adjust; 3774 #endif 3775 bo->bo_appie += adjust; 3776 bo->bo_wme += adjust; 3777 bo->bo_csa += adjust; 3778 bo->bo_quiet += adjust; 3779 bo->bo_tim_len = timlen; 3780 3781 /* update information element */ 3782 tie->tim_len = 3 + timlen; 3783 tie->tim_bitctl = timoff; 3784 len_changed = 1; 3785 } 3786 memcpy(tie->tim_bitmap, vap->iv_tim_bitmap + timoff, 3787 bo->bo_tim_len); 3788 3789 clrbit(bo->bo_flags, IEEE80211_BEACON_TIM); 3790 3791 IEEE80211_DPRINTF(vap, IEEE80211_MSG_POWER, 3792 "%s: TIM updated, pending %u, off %u, len %u\n", 3793 __func__, vap->iv_ps_pending, timoff, timlen); 3794 } 3795 /* count down DTIM period */ 3796 if (tie->tim_count == 0) 3797 tie->tim_count = tie->tim_period - 1; 3798 else 3799 tie->tim_count--; 3800 /* update state for buffered multicast frames on DTIM */ 3801 if (mcast && tie->tim_count == 0) 3802 tie->tim_bitctl |= 1; 3803 else 3804 tie->tim_bitctl &= ~1; 3805 if (isset(bo->bo_flags, IEEE80211_BEACON_CSA)) { 3806 struct ieee80211_csa_ie *csa = 3807 (struct ieee80211_csa_ie *) bo->bo_csa; 3808 3809 /* 3810 * Insert or update CSA ie. If we're just starting 3811 * to count down to the channel switch then we need 3812 * to insert the CSA ie. Otherwise we just need to 3813 * drop the count. The actual change happens above 3814 * when the vap's count reaches the target count. 3815 */ 3816 if (vap->iv_csa_count == 0) { 3817 memmove(&csa[1], csa, bo->bo_csa_trailer_len); 3818 bo->bo_erp += sizeof(*csa); 3819 bo->bo_htinfo += sizeof(*csa); 3820 bo->bo_vhtinfo += sizeof(*csa); 3821 bo->bo_wme += sizeof(*csa); 3822 #ifdef IEEE80211_SUPPORT_SUPERG 3823 bo->bo_ath += sizeof(*csa); 3824 #endif 3825 #ifdef IEEE80211_SUPPORT_TDMA 3826 bo->bo_tdma += sizeof(*csa); 3827 #endif 3828 #ifdef IEEE80211_SUPPORT_MESH 3829 bo->bo_meshconf += sizeof(*csa); 3830 #endif 3831 bo->bo_appie += sizeof(*csa); 3832 bo->bo_csa_trailer_len += sizeof(*csa); 3833 bo->bo_quiet += sizeof(*csa); 3834 bo->bo_tim_trailer_len += sizeof(*csa); 3835 m->m_len += sizeof(*csa); 3836 m->m_pkthdr.len += sizeof(*csa); 3837 3838 ieee80211_add_csa(bo->bo_csa, vap); 3839 } else 3840 csa->csa_count--; 3841 vap->iv_csa_count++; 3842 /* NB: don't clear IEEE80211_BEACON_CSA */ 3843 } 3844 3845 /* 3846 * Only add the quiet time IE if we've enabled it 3847 * as appropriate. 3848 */ 3849 if (IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) && 3850 (vap->iv_flags_ext & IEEE80211_FEXT_DFS)) { 3851 if (vap->iv_quiet && 3852 (vap->iv_flags_ext & IEEE80211_FEXT_QUIET_IE)) { 3853 ieee80211_add_quiet(bo->bo_quiet, vap, 1); 3854 } 3855 } 3856 if (isset(bo->bo_flags, IEEE80211_BEACON_ERP)) { 3857 /* 3858 * ERP element needs updating. 3859 */ 3860 (void) ieee80211_add_erp(bo->bo_erp, ic); 3861 clrbit(bo->bo_flags, IEEE80211_BEACON_ERP); 3862 } 3863 #ifdef IEEE80211_SUPPORT_SUPERG 3864 if (isset(bo->bo_flags, IEEE80211_BEACON_ATH)) { 3865 ieee80211_add_athcaps(bo->bo_ath, ni); 3866 clrbit(bo->bo_flags, IEEE80211_BEACON_ATH); 3867 } 3868 #endif 3869 } 3870 if (isset(bo->bo_flags, IEEE80211_BEACON_APPIE)) { 3871 const struct ieee80211_appie *aie = vap->iv_appie_beacon; 3872 int aielen; 3873 uint8_t *frm; 3874 3875 aielen = 0; 3876 if (aie != NULL) 3877 aielen += aie->ie_len; 3878 if (aielen != bo->bo_appie_len) { 3879 /* copy up/down trailer */ 3880 int adjust = aielen - bo->bo_appie_len; 3881 ovbcopy(bo->bo_tim_trailer, bo->bo_tim_trailer+adjust, 3882 bo->bo_tim_trailer_len); 3883 bo->bo_tim_trailer += adjust; 3884 bo->bo_appie += adjust; 3885 bo->bo_appie_len = aielen; 3886 3887 len_changed = 1; 3888 } 3889 frm = bo->bo_appie; 3890 if (aie != NULL) 3891 frm = add_appie(frm, aie); 3892 clrbit(bo->bo_flags, IEEE80211_BEACON_APPIE); 3893 } 3894 IEEE80211_UNLOCK(ic); 3895 3896 return len_changed; 3897 } 3898 3899 /* 3900 * Do Ethernet-LLC encapsulation for each payload in a fast frame 3901 * tunnel encapsulation. The frame is assumed to have an Ethernet 3902 * header at the front that must be stripped before prepending the 3903 * LLC followed by the Ethernet header passed in (with an Ethernet 3904 * type that specifies the payload size). 3905 */ 3906 struct mbuf * 3907 ieee80211_ff_encap1(struct ieee80211vap *vap, struct mbuf *m, 3908 const struct ether_header *eh) 3909 { 3910 struct llc *llc; 3911 uint16_t payload; 3912 3913 /* XXX optimize by combining m_adj+M_PREPEND */ 3914 m_adj(m, sizeof(struct ether_header) - sizeof(struct llc)); 3915 llc = mtod(m, struct llc *); 3916 llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP; 3917 llc->llc_control = LLC_UI; 3918 llc->llc_snap.org_code[0] = 0; 3919 llc->llc_snap.org_code[1] = 0; 3920 llc->llc_snap.org_code[2] = 0; 3921 llc->llc_snap.ether_type = eh->ether_type; 3922 payload = m->m_pkthdr.len; /* NB: w/o Ethernet header */ 3923 3924 M_PREPEND(m, sizeof(struct ether_header), M_NOWAIT); 3925 if (m == NULL) { /* XXX cannot happen */ 3926 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG, 3927 "%s: no space for ether_header\n", __func__); 3928 vap->iv_stats.is_tx_nobuf++; 3929 return NULL; 3930 } 3931 ETHER_HEADER_COPY(mtod(m, void *), eh); 3932 mtod(m, struct ether_header *)->ether_type = htons(payload); 3933 return m; 3934 } 3935 3936 /* 3937 * Complete an mbuf transmission. 3938 * 3939 * For now, this simply processes a completed frame after the 3940 * driver has completed it's transmission and/or retransmission. 3941 * It assumes the frame is an 802.11 encapsulated frame. 3942 * 3943 * Later on it will grow to become the exit path for a given frame 3944 * from the driver and, depending upon how it's been encapsulated 3945 * and already transmitted, it may end up doing A-MPDU retransmission, 3946 * power save requeuing, etc. 3947 * 3948 * In order for the above to work, the driver entry point to this 3949 * must not hold any driver locks. Thus, the driver needs to delay 3950 * any actual mbuf completion until it can release said locks. 3951 * 3952 * This frees the mbuf and if the mbuf has a node reference, 3953 * the node reference will be freed. 3954 */ 3955 void 3956 ieee80211_tx_complete(struct ieee80211_node *ni, struct mbuf *m, int status) 3957 { 3958 3959 if (ni != NULL) { 3960 struct ifnet *ifp = ni->ni_vap->iv_ifp; 3961 3962 if (status == 0) { 3963 if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len); 3964 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1); 3965 if (m->m_flags & M_MCAST) 3966 if_inc_counter(ifp, IFCOUNTER_OMCASTS, 1); 3967 } else 3968 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 3969 if (m->m_flags & M_TXCB) 3970 ieee80211_process_callback(ni, m, status); 3971 ieee80211_free_node(ni); 3972 } 3973 m_freem(m); 3974 } 3975
Indexes created Fri Sep 26 08:10:20 GMT 2025