ieee80211_output.c revision 1.63.2.3
1 /* $NetBSD: ieee80211_output.c,v 1.63.2.3 2018/07/16 20:11:11 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 #if __FreeBSD__ 648 int 649 ieee80211_output(struct ifnet *ifp, struct mbuf *m, 650 const struct sockaddr *dst, struct route *ro) 651 #elif __NetBSD__ 652 int 653 ieee80211_output(struct ifnet *ifp, struct mbuf *m, 654 const struct sockaddr *dst, const struct rtentry *ro) 655 #endif 656 { 657 #define senderr(e) do { error = (e); goto bad;} while (0) 658 const struct ieee80211_bpf_params *params = NULL; 659 struct ieee80211_node *ni = NULL; 660 struct ieee80211vap *vap; 661 struct ieee80211_frame *wh; 662 struct ieee80211com *ic = NULL; 663 int error; 664 int ret; 665 666 #if __FreeBSD__ 667 if (ifp->if_drv_flags & IFF_DRV_OACTIVE) { 668 #elif __NetBSD__ 669 if (ifp->if_flags & IFF_OACTIVE) { 670 #endif 671 /* 672 * Short-circuit requests if the vap is marked OACTIVE 673 * as this can happen because a packet came down through 674 * ieee80211_start before the vap entered RUN state in 675 * which case it's ok to just drop the frame. This 676 * should not be necessary but callers of if_output don't 677 * check OACTIVE. 678 */ 679 senderr(ENETDOWN); 680 } 681 vap = ifp->if_softc; 682 ic = vap->iv_ic; 683 /* 684 * Hand to the 802.3 code if not tagged as 685 * a raw 802.11 frame. 686 */ 687 if (dst->sa_family != AF_IEEE80211) 688 return vap->iv_output(ifp, m, dst, ro); 689 #ifdef MAC 690 error = mac_ifnet_check_transmit(ifp, m); 691 if (error) 692 senderr(error); 693 #endif 694 #if __FreeBSD__ 695 if (ifp->if_flags & IFF_MONITOR) 696 senderr(ENETDOWN); 697 #endif 698 if (!IFNET_IS_UP_RUNNING(ifp)) 699 senderr(ENETDOWN); 700 if (vap->iv_state == IEEE80211_S_CAC) { 701 IEEE80211_DPRINTF(vap, 702 IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH, 703 "block %s frame in CAC state\n", "raw data"); 704 vap->iv_stats.is_tx_badstate++; 705 senderr(EIO); /* XXX */ 706 } else if (vap->iv_state == IEEE80211_S_SCAN) 707 senderr(EIO); 708 /* XXX bypass bridge, pfil, carp, etc. */ 709 710 /* 711 * NB: DLT_IEEE802_11_RADIO identifies the parameters are 712 * present by setting the sa_len field of the sockaddr (yes, 713 * this is a hack). 714 * NB: we assume sa_data is suitably aligned to cast. 715 */ 716 if (dst->sa_len != 0) 717 params = (const struct ieee80211_bpf_params *)dst->sa_data; 718 719 error = ieee80211_validate_frame(m, params); 720 if (error != 0) 721 senderr(error); 722 723 wh = mtod(m, struct ieee80211_frame *); 724 725 /* locate destination node */ 726 switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) { 727 case IEEE80211_FC1_DIR_NODS: 728 case IEEE80211_FC1_DIR_FROMDS: 729 ni = ieee80211_find_txnode(vap, wh->i_addr1); 730 break; 731 case IEEE80211_FC1_DIR_TODS: 732 case IEEE80211_FC1_DIR_DSTODS: 733 ni = ieee80211_find_txnode(vap, wh->i_addr3); 734 break; 735 default: 736 senderr(EDOOFUS); 737 } 738 if (ni == NULL) { 739 /* 740 * Permit packets w/ bpf params through regardless 741 * (see below about sa_len). 742 */ 743 if (dst->sa_len == 0) 744 senderr(EHOSTUNREACH); 745 ni = ieee80211_ref_node(vap->iv_bss); 746 } 747 748 /* 749 * Sanitize mbuf for net80211 flags leaked from above. 750 * 751 * NB: This must be done before ieee80211_classify as 752 * it marks EAPOL in frames with M_EAPOL. 753 */ 754 m->m_flags &= ~M_80211_TX; 755 m->m_flags |= M_ENCAP; /* mark encapsulated */ 756 757 if (IEEE80211_IS_DATA(wh)) { 758 /* calculate priority so drivers can find the tx queue */ 759 if (ieee80211_classify(ni, m)) 760 senderr(EIO); /* XXX */ 761 762 /* NB: ieee80211_encap does not include 802.11 header */ 763 IEEE80211_NODE_STAT_ADD(ni, tx_bytes, 764 m->m_pkthdr.len - ieee80211_hdrsize(wh)); 765 } else 766 M_WME_SETAC(m, WME_AC_BE); 767 768 IEEE80211_NODE_STAT(ni, tx_data); 769 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 770 IEEE80211_NODE_STAT(ni, tx_mcast); 771 m->m_flags |= M_MCAST; 772 } else 773 IEEE80211_NODE_STAT(ni, tx_ucast); 774 775 IEEE80211_TX_LOCK(ic); 776 ret = ieee80211_raw_output(vap, ni, m, params); 777 IEEE80211_TX_UNLOCK(ic); 778 return (ret); 779 bad: 780 if (m != NULL) 781 m_freem(m); 782 if (ni != NULL) 783 ieee80211_free_node(ni); 784 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 785 return error; 786 #undef senderr 787 } 788 789 /* 790 * Set the direction field and address fields of an outgoing 791 * frame. Note this should be called early on in constructing 792 * a frame as it sets i_fc[1]; other bits can then be or'd in. 793 */ 794 void 795 ieee80211_send_setup( 796 struct ieee80211_node *ni, 797 struct mbuf *m, 798 int type, int tid, 799 const uint8_t sa[IEEE80211_ADDR_LEN], 800 const uint8_t da[IEEE80211_ADDR_LEN], 801 const uint8_t bssid[IEEE80211_ADDR_LEN]) 802 { 803 #define WH4(wh) ((struct ieee80211_frame_addr4 *)wh) 804 struct ieee80211vap *vap = ni->ni_vap; 805 struct ieee80211_tx_ampdu *tap; 806 struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *); 807 ieee80211_seq seqno; 808 809 IEEE80211_TX_LOCK_ASSERT(ni->ni_ic); 810 811 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | type; 812 if ((type & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_DATA) { 813 switch (vap->iv_opmode) { 814 case IEEE80211_M_STA: 815 wh->i_fc[1] = IEEE80211_FC1_DIR_TODS; 816 IEEE80211_ADDR_COPY(wh->i_addr1, bssid); 817 IEEE80211_ADDR_COPY(wh->i_addr2, sa); 818 IEEE80211_ADDR_COPY(wh->i_addr3, da); 819 break; 820 case IEEE80211_M_IBSS: 821 case IEEE80211_M_AHDEMO: 822 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 823 IEEE80211_ADDR_COPY(wh->i_addr1, da); 824 IEEE80211_ADDR_COPY(wh->i_addr2, sa); 825 IEEE80211_ADDR_COPY(wh->i_addr3, bssid); 826 break; 827 case IEEE80211_M_HOSTAP: 828 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS; 829 IEEE80211_ADDR_COPY(wh->i_addr1, da); 830 IEEE80211_ADDR_COPY(wh->i_addr2, bssid); 831 IEEE80211_ADDR_COPY(wh->i_addr3, sa); 832 break; 833 case IEEE80211_M_WDS: 834 wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS; 835 IEEE80211_ADDR_COPY(wh->i_addr1, da); 836 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); 837 IEEE80211_ADDR_COPY(wh->i_addr3, da); 838 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, sa); 839 break; 840 case IEEE80211_M_MBSS: 841 #ifdef IEEE80211_SUPPORT_MESH 842 if (IEEE80211_IS_MULTICAST(da)) { 843 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS; 844 /* XXX next hop */ 845 IEEE80211_ADDR_COPY(wh->i_addr1, da); 846 IEEE80211_ADDR_COPY(wh->i_addr2, 847 vap->iv_myaddr); 848 } else { 849 wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS; 850 IEEE80211_ADDR_COPY(wh->i_addr1, da); 851 IEEE80211_ADDR_COPY(wh->i_addr2, 852 vap->iv_myaddr); 853 IEEE80211_ADDR_COPY(wh->i_addr3, da); 854 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, sa); 855 } 856 #endif 857 break; 858 case IEEE80211_M_MONITOR: /* NB: to quiet compiler */ 859 break; 860 } 861 } else { 862 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 863 IEEE80211_ADDR_COPY(wh->i_addr1, da); 864 IEEE80211_ADDR_COPY(wh->i_addr2, sa); 865 #ifdef IEEE80211_SUPPORT_MESH 866 if (vap->iv_opmode == IEEE80211_M_MBSS) 867 IEEE80211_ADDR_COPY(wh->i_addr3, sa); 868 else 869 #endif 870 IEEE80211_ADDR_COPY(wh->i_addr3, bssid); 871 } 872 *(uint16_t *)&wh->i_dur[0] = 0; 873 874 /* 875 * XXX TODO: this is what the TX lock is for. 876 * Here we're incrementing sequence numbers, and they 877 * need to be in lock-step with what the driver is doing 878 * both in TX ordering and crypto encap (IV increment.) 879 * 880 * If the driver does seqno itself, then we can skip 881 * assigning sequence numbers here, and we can avoid 882 * requiring the TX lock. 883 */ 884 tap = &ni->ni_tx_ampdu[tid]; 885 if (tid != IEEE80211_NONQOS_TID && IEEE80211_AMPDU_RUNNING(tap)) { 886 m->m_flags |= M_AMPDU_MPDU; 887 888 /* NB: zero out i_seq field (for s/w encryption etc) */ 889 *(uint16_t *)&wh->i_seq[0] = 0; 890 } else { 891 if (IEEE80211_HAS_SEQ(type & IEEE80211_FC0_TYPE_MASK, 892 type & IEEE80211_FC0_SUBTYPE_MASK)) 893 /* 894 * 802.11-2012 9.3.2.10 - QoS multicast frames 895 * come out of a different seqno space. 896 */ 897 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 898 seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]++; 899 } else { 900 seqno = ni->ni_txseqs[tid]++; 901 } 902 else 903 seqno = 0; 904 905 *(uint16_t *)&wh->i_seq[0] = 906 htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); 907 M_SEQNO_SET(m, seqno); 908 } 909 910 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) 911 m->m_flags |= M_MCAST; 912 #undef WH4 913 } 914 915 /* 916 * Send a management frame to the specified node. The node pointer 917 * must have a reference as the pointer will be passed to the driver 918 * and potentially held for a long time. If the frame is successfully 919 * dispatched to the driver, then it is responsible for freeing the 920 * reference (and potentially free'ing up any associated storage); 921 * otherwise deal with reclaiming any reference (on error). 922 */ 923 int 924 ieee80211_mgmt_output(struct ieee80211_node *ni, struct mbuf *m, int type, 925 struct ieee80211_bpf_params *params) 926 { 927 struct ieee80211vap *vap = ni->ni_vap; 928 struct ieee80211com *ic = ni->ni_ic; 929 struct ieee80211_frame *wh; 930 int ret; 931 932 KASSERT(ni != NULL, ("null node")); 933 934 if (vap->iv_state == IEEE80211_S_CAC) { 935 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH, 936 ni, "block %s frame in CAC state", 937 ieee80211_mgt_subtype_name(type)); 938 vap->iv_stats.is_tx_badstate++; 939 ieee80211_free_node(ni); 940 m_freem(m); 941 return EIO; /* XXX */ 942 } 943 944 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); 945 if (m == NULL) { 946 ieee80211_free_node(ni); 947 return ENOMEM; 948 } 949 950 IEEE80211_TX_LOCK(ic); 951 952 wh = mtod(m, struct ieee80211_frame *); 953 ieee80211_send_setup(ni, m, 954 IEEE80211_FC0_TYPE_MGT | type, IEEE80211_NONQOS_TID, 955 vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid); 956 if (params->ibp_flags & IEEE80211_BPF_CRYPTO) { 957 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr1, 958 "encrypting frame (%s)", __func__); 959 wh->i_fc[1] |= IEEE80211_FC1_PROTECTED; 960 } 961 m->m_flags |= M_ENCAP; /* mark encapsulated */ 962 963 KASSERT(type != IEEE80211_FC0_SUBTYPE_PROBE_RESP, ("probe response?")); 964 M_WME_SETAC(m, params->ibp_pri); 965 966 #ifdef IEEE80211_DEBUG 967 /* avoid printing too many frames */ 968 if ((ieee80211_msg_debug(vap) && doprint(vap, type)) || 969 ieee80211_msg_dumppkts(vap)) { 970 printf("[%s] send %s on channel %u\n", 971 ether_sprintf(wh->i_addr1), 972 ieee80211_mgt_subtype_name(type), 973 ieee80211_chan2ieee(ic, ic->ic_curchan)); 974 } 975 #endif 976 IEEE80211_NODE_STAT(ni, tx_mgmt); 977 978 ret = ieee80211_raw_output(vap, ni, m, params); 979 IEEE80211_TX_UNLOCK(ic); 980 return (ret); 981 } 982 983 static void 984 ieee80211_nulldata_transmitted(struct ieee80211_node *ni, void *arg, 985 int status) 986 { 987 struct ieee80211vap *vap = ni->ni_vap; 988 989 wakeup(vap); 990 } 991 992 /* 993 * Send a null data frame to the specified node. If the station 994 * is setup for QoS then a QoS Null Data frame is constructed. 995 * If this is a WDS station then a 4-address frame is constructed. 996 * 997 * NB: the caller is assumed to have setup a node reference 998 * for use; this is necessary to deal with a race condition 999 * when probing for inactive stations. Like ieee80211_mgmt_output 1000 * we must cleanup any node reference on error; however we 1001 * can safely just unref it as we know it will never be the 1002 * last reference to the node. 1003 */ 1004 int 1005 ieee80211_send_nulldata(struct ieee80211_node *ni) 1006 { 1007 struct ieee80211vap *vap = ni->ni_vap; 1008 struct ieee80211com *ic = ni->ni_ic; 1009 struct mbuf *m; 1010 struct ieee80211_frame *wh; 1011 int hdrlen; 1012 uint8_t *frm; 1013 int ret; 1014 1015 if (vap->iv_state == IEEE80211_S_CAC) { 1016 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH, 1017 ni, "block %s frame in CAC state", "null data"); 1018 ieee80211_unref_node(&ni); 1019 vap->iv_stats.is_tx_badstate++; 1020 return EIO; /* XXX */ 1021 } 1022 1023 if (ni->ni_flags & (IEEE80211_NODE_QOS|IEEE80211_NODE_HT)) 1024 hdrlen = sizeof(struct ieee80211_qosframe); 1025 else 1026 hdrlen = sizeof(struct ieee80211_frame); 1027 /* NB: only WDS vap's get 4-address frames */ 1028 if (vap->iv_opmode == IEEE80211_M_WDS) 1029 hdrlen += IEEE80211_ADDR_LEN; 1030 if (ic->ic_flags & IEEE80211_F_DATAPAD) 1031 hdrlen = roundup(hdrlen, sizeof(uint32_t)); 1032 1033 m = ieee80211_getmgtframe(&frm, ic->ic_headroom + hdrlen, 0); 1034 if (m == NULL) { 1035 /* XXX debug msg */ 1036 ieee80211_unref_node(&ni); 1037 vap->iv_stats.is_tx_nobuf++; 1038 return ENOMEM; 1039 } 1040 KASSERT(M_LEADINGSPACE(m) >= hdrlen, 1041 ("leading space %zd", M_LEADINGSPACE(m))); 1042 M_PREPEND(m, hdrlen, M_NOWAIT); 1043 if (m == NULL) { 1044 /* NB: cannot happen */ 1045 ieee80211_free_node(ni); 1046 return ENOMEM; 1047 } 1048 1049 IEEE80211_TX_LOCK(ic); 1050 1051 wh = mtod(m, struct ieee80211_frame *); /* NB: a little lie */ 1052 if (ni->ni_flags & IEEE80211_NODE_QOS) { 1053 const int tid = WME_AC_TO_TID(WME_AC_BE); 1054 uint8_t *qos; 1055 1056 ieee80211_send_setup(ni, m, 1057 IEEE80211_FC0_TYPE_DATA | IEEE80211_FC0_SUBTYPE_QOS_NULL, 1058 tid, vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid); 1059 1060 if (vap->iv_opmode == IEEE80211_M_WDS) 1061 qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos; 1062 else 1063 qos = ((struct ieee80211_qosframe *) wh)->i_qos; 1064 qos[0] = tid & IEEE80211_QOS_TID; 1065 if (ic->ic_wme.wme_wmeChanParams.cap_wmeParams[WME_AC_BE].wmep_noackPolicy) 1066 qos[0] |= IEEE80211_QOS_ACKPOLICY_NOACK; 1067 qos[1] = 0; 1068 } else { 1069 ieee80211_send_setup(ni, m, 1070 IEEE80211_FC0_TYPE_DATA | IEEE80211_FC0_SUBTYPE_NODATA, 1071 IEEE80211_NONQOS_TID, 1072 vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid); 1073 } 1074 if (vap->iv_opmode != IEEE80211_M_WDS) { 1075 /* NB: power management bit is never sent by an AP */ 1076 if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) && 1077 vap->iv_opmode != IEEE80211_M_HOSTAP) 1078 wh->i_fc[1] |= IEEE80211_FC1_PWR_MGT; 1079 } 1080 if ((ic->ic_flags & IEEE80211_F_SCAN) && 1081 (ni->ni_flags & IEEE80211_NODE_PWR_MGT)) { 1082 ieee80211_add_callback(m, ieee80211_nulldata_transmitted, 1083 NULL); 1084 } 1085 m->m_len = m->m_pkthdr.len = hdrlen; 1086 m->m_flags |= M_ENCAP; /* mark encapsulated */ 1087 1088 M_WME_SETAC(m, WME_AC_BE); 1089 1090 IEEE80211_NODE_STAT(ni, tx_data); 1091 1092 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS, ni, 1093 "send %snull data frame on channel %u, pwr mgt %s", 1094 ni->ni_flags & IEEE80211_NODE_QOS ? "QoS " : "", 1095 ieee80211_chan2ieee(ic, ic->ic_curchan), 1096 wh->i_fc[1] & IEEE80211_FC1_PWR_MGT ? "ena" : "dis"); 1097 1098 ret = ieee80211_raw_output(vap, ni, m, NULL); 1099 IEEE80211_TX_UNLOCK(ic); 1100 return (ret); 1101 } 1102 1103 /* 1104 * Assign priority to a frame based on any vlan tag assigned 1105 * to the station and/or any Diffserv setting in an IP header. 1106 * Finally, if an ACM policy is setup (in station mode) it's 1107 * applied. 1108 */ 1109 int 1110 ieee80211_classify(struct ieee80211_node *ni, struct mbuf *m) 1111 { 1112 const struct ether_header *eh = NULL; 1113 uint16_t ether_type; 1114 int v_wme_ac, d_wme_ac, ac; 1115 1116 if (__predict_false(m->m_flags & M_ENCAP)) { 1117 struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *); 1118 struct llc *llc; 1119 int hdrlen, subtype; 1120 1121 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1122 if (subtype & IEEE80211_FC0_SUBTYPE_NODATA) { 1123 ac = WME_AC_BE; 1124 goto done; 1125 } 1126 1127 hdrlen = ieee80211_hdrsize(wh); 1128 if (m->m_pkthdr.len < hdrlen + sizeof(*llc)) 1129 return 1; 1130 1131 llc = (struct llc *)mtodo(m, hdrlen); 1132 if (llc->llc_dsap != LLC_SNAP_LSAP || 1133 llc->llc_ssap != LLC_SNAP_LSAP || 1134 llc->llc_control != LLC_UI || 1135 llc->llc_snap.org_code[0] != 0 || 1136 llc->llc_snap.org_code[1] != 0 || 1137 llc->llc_snap.org_code[2] != 0) 1138 return 1; 1139 1140 ether_type = llc->llc_snap.ether_type; 1141 } else { 1142 eh = mtod(m, struct ether_header *); 1143 ether_type = eh->ether_type; 1144 } 1145 1146 /* 1147 * Always promote PAE/EAPOL frames to high priority. 1148 */ 1149 if (ether_type == htons(ETHERTYPE_PAE)) { 1150 /* NB: mark so others don't need to check header */ 1151 m->m_flags |= M_EAPOL; 1152 ac = WME_AC_VO; 1153 goto done; 1154 } 1155 /* 1156 * Non-qos traffic goes to BE. 1157 */ 1158 if ((ni->ni_flags & IEEE80211_NODE_QOS) == 0) { 1159 ac = WME_AC_BE; 1160 goto done; 1161 } 1162 1163 /* 1164 * If node has a vlan tag then all traffic 1165 * to it must have a matching tag. 1166 */ 1167 v_wme_ac = 0; 1168 if (ni->ni_vlan != 0) { 1169 if ((m->m_flags & M_VLANTAG) == 0) { 1170 IEEE80211_NODE_STAT(ni, tx_novlantag); 1171 return 1; 1172 } 1173 if (EVL_VLANOFTAG(m->m_pkthdr.ether_vtag) != 1174 EVL_VLANOFTAG(ni->ni_vlan)) { 1175 IEEE80211_NODE_STAT(ni, tx_vlanmismatch); 1176 return 1; 1177 } 1178 /* map vlan priority to AC */ 1179 v_wme_ac = TID_TO_WME_AC(EVL_PRIOFTAG(ni->ni_vlan)); 1180 } 1181 1182 /* XXX m_copydata may be too slow for fast path */ 1183 #ifdef INET 1184 if (eh && eh->ether_type == htons(ETHERTYPE_IP)) { 1185 uint8_t tos; 1186 /* 1187 * IP frame, map the DSCP bits from the TOS field. 1188 */ 1189 /* NB: ip header may not be in first mbuf */ 1190 m_copydata(m, sizeof(struct ether_header) + 1191 offsetof(struct ip, ip_tos), sizeof(tos), &tos); 1192 tos >>= 5; /* NB: ECN + low 3 bits of DSCP */ 1193 d_wme_ac = TID_TO_WME_AC(tos); 1194 } else { 1195 #endif /* INET */ 1196 #ifdef INET6 1197 if (eh && eh->ether_type == htons(ETHERTYPE_IPV6)) { 1198 uint32_t flow; 1199 uint8_t tos; 1200 /* 1201 * IPv6 frame, map the DSCP bits from the traffic class field. 1202 */ 1203 m_copydata(m, sizeof(struct ether_header) + 1204 offsetof(struct ip6_hdr, ip6_flow), sizeof(flow), 1205 (caddr_t) &flow); 1206 tos = (uint8_t)(ntohl(flow) >> 20); 1207 tos >>= 5; /* NB: ECN + low 3 bits of DSCP */ 1208 d_wme_ac = TID_TO_WME_AC(tos); 1209 } else { 1210 #endif /* INET6 */ 1211 d_wme_ac = WME_AC_BE; 1212 #ifdef INET6 1213 } 1214 #endif 1215 #ifdef INET 1216 } 1217 #endif 1218 /* 1219 * Use highest priority AC. 1220 */ 1221 if (v_wme_ac > d_wme_ac) 1222 ac = v_wme_ac; 1223 else 1224 ac = d_wme_ac; 1225 1226 /* 1227 * Apply ACM policy. 1228 */ 1229 if (ni->ni_vap->iv_opmode == IEEE80211_M_STA) { 1230 static const int acmap[4] = { 1231 WME_AC_BK, /* WME_AC_BE */ 1232 WME_AC_BK, /* WME_AC_BK */ 1233 WME_AC_BE, /* WME_AC_VI */ 1234 WME_AC_VI, /* WME_AC_VO */ 1235 }; 1236 struct ieee80211com *ic = ni->ni_ic; 1237 1238 while (ac != WME_AC_BK && 1239 ic->ic_wme.wme_wmeBssChanParams.cap_wmeParams[ac].wmep_acm) 1240 ac = acmap[ac]; 1241 } 1242 done: 1243 M_WME_SETAC(m, ac); 1244 return 0; 1245 } 1246 1247 /* 1248 * Insure there is sufficient contiguous space to encapsulate the 1249 * 802.11 data frame. If room isn't already there, arrange for it. 1250 * Drivers and cipher modules assume we have done the necessary work 1251 * and fail rudely if they don't find the space they need. 1252 */ 1253 struct mbuf * 1254 ieee80211_mbuf_adjust(struct ieee80211vap *vap, int hdrsize, 1255 struct ieee80211_key *key, struct mbuf *m) 1256 { 1257 #define TO_BE_RECLAIMED (sizeof(struct ether_header) - sizeof(struct llc)) 1258 int needed_space = vap->iv_ic->ic_headroom + hdrsize; 1259 1260 if (key != NULL) { 1261 /* XXX belongs in crypto code? */ 1262 needed_space += key->wk_cipher->ic_header; 1263 /* XXX frags */ 1264 /* 1265 * When crypto is being done in the host we must insure 1266 * the data are writable for the cipher routines; clone 1267 * a writable mbuf chain. 1268 * XXX handle SWMIC specially 1269 */ 1270 if (key->wk_flags & (IEEE80211_KEY_SWENCRYPT|IEEE80211_KEY_SWENMIC)) { 1271 m = m_unshare(m, M_NOWAIT); 1272 if (m == NULL) { 1273 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 1274 "%s: cannot get writable mbuf\n", __func__); 1275 vap->iv_stats.is_tx_nobuf++; /* XXX new stat */ 1276 return NULL; 1277 } 1278 } 1279 } 1280 /* 1281 * We know we are called just before stripping an Ethernet 1282 * header and prepending an LLC header. This means we know 1283 * there will be 1284 * sizeof(struct ether_header) - sizeof(struct llc) 1285 * bytes recovered to which we need additional space for the 1286 * 802.11 header and any crypto header. 1287 */ 1288 /* XXX check trailing space and copy instead? */ 1289 if (M_LEADINGSPACE(m) < needed_space - TO_BE_RECLAIMED) { 1290 struct mbuf *n = m_gethdr(M_NOWAIT, m->m_type); 1291 if (n == NULL) { 1292 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 1293 "%s: cannot expand storage\n", __func__); 1294 vap->iv_stats.is_tx_nobuf++; 1295 m_freem(m); 1296 return NULL; 1297 } 1298 #if __FreeBSD__ 1299 KASSERT(needed_space <= MHLEN, 1300 ("not enough room, need %u got %d\n", needed_space, MHLEN)); 1301 #elif __NetBSD__ 1302 KASSERT(needed_space <= MHLEN, 1303 ("not enough room, need %u got %lu\n", needed_space, MHLEN)); 1304 #endif 1305 /* 1306 * Setup new mbuf to have leading space to prepend the 1307 * 802.11 header and any crypto header bits that are 1308 * required (the latter are added when the driver calls 1309 * back to ieee80211_crypto_encap to do crypto encapsulation). 1310 */ 1311 /* NB: must be first 'cuz it clobbers m_data */ 1312 m_move_pkthdr(n, m); 1313 n->m_len = 0; /* NB: m_gethdr does not set */ 1314 n->m_data += needed_space; 1315 /* 1316 * Pull up Ethernet header to create the expected layout. 1317 * We could use m_pullup but that's overkill (i.e. we don't 1318 * need the actual data) and it cannot fail so do it inline 1319 * for speed. 1320 */ 1321 /* NB: struct ether_header is known to be contiguous */ 1322 n->m_len += sizeof(struct ether_header); 1323 m->m_len -= sizeof(struct ether_header); 1324 m->m_data += sizeof(struct ether_header); 1325 /* 1326 * Replace the head of the chain. 1327 */ 1328 n->m_next = m; 1329 m = n; 1330 } 1331 return m; 1332 #undef TO_BE_RECLAIMED 1333 } 1334 1335 /* 1336 * Return the transmit key to use in sending a unicast frame. 1337 * If a unicast key is set we use that. When no unicast key is set 1338 * we fall back to the default transmit key. 1339 */ 1340 static __inline struct ieee80211_key * 1341 ieee80211_crypto_getucastkey(struct ieee80211vap *vap, 1342 struct ieee80211_node *ni) 1343 { 1344 if (IEEE80211_KEY_UNDEFINED(&ni->ni_ucastkey)) { 1345 if (vap->iv_def_txkey == IEEE80211_KEYIX_NONE || 1346 IEEE80211_KEY_UNDEFINED(&vap->iv_nw_keys[vap->iv_def_txkey])) 1347 return NULL; 1348 return &vap->iv_nw_keys[vap->iv_def_txkey]; 1349 } else { 1350 return &ni->ni_ucastkey; 1351 } 1352 } 1353 1354 /* 1355 * Return the transmit key to use in sending a multicast frame. 1356 * Multicast traffic always uses the group key which is installed as 1357 * the default tx key. 1358 */ 1359 static __inline struct ieee80211_key * 1360 ieee80211_crypto_getmcastkey(struct ieee80211vap *vap, 1361 struct ieee80211_node *ni) 1362 { 1363 if (vap->iv_def_txkey == IEEE80211_KEYIX_NONE || 1364 IEEE80211_KEY_UNDEFINED(&vap->iv_nw_keys[vap->iv_def_txkey])) 1365 return NULL; 1366 return &vap->iv_nw_keys[vap->iv_def_txkey]; 1367 } 1368 1369 /* 1370 * Encapsulate an outbound data frame. The mbuf chain is updated. 1371 * If an error is encountered NULL is returned. The caller is required 1372 * to provide a node reference and pullup the ethernet header in the 1373 * first mbuf. 1374 * 1375 * NB: Packet is assumed to be processed by ieee80211_classify which 1376 * marked EAPOL frames w/ M_EAPOL. 1377 */ 1378 struct mbuf * 1379 ieee80211_encap(struct ieee80211vap *vap, struct ieee80211_node *ni, 1380 struct mbuf *m) 1381 { 1382 #define WH4(wh) ((struct ieee80211_frame_addr4 *)(wh)) 1383 #define MC01(mc) ((struct ieee80211_meshcntl_ae01 *)mc) 1384 struct ieee80211com *ic = ni->ni_ic; 1385 #ifdef IEEE80211_SUPPORT_MESH 1386 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1387 struct ieee80211_meshcntl_ae10 *mc; 1388 struct ieee80211_mesh_route *rt = NULL; 1389 int dir = -1; 1390 #endif 1391 struct ether_header eh; 1392 struct ieee80211_frame *wh; 1393 struct ieee80211_key *key; 1394 struct llc *llc; 1395 int hdrsize, hdrspace, datalen, addqos, txfrag, is4addr, is_mcast; 1396 ieee80211_seq seqno; 1397 int meshhdrsize, meshae; 1398 uint8_t *qos; 1399 int is_amsdu = 0; 1400 1401 IEEE80211_TX_LOCK_ASSERT(ic); 1402 1403 is_mcast = !! (m->m_flags & (M_MCAST | M_BCAST)); 1404 1405 /* 1406 * Copy existing Ethernet header to a safe place. The 1407 * rest of the code assumes it's ok to strip it when 1408 * reorganizing state for the final encapsulation. 1409 */ 1410 KASSERT(m->m_len >= sizeof(eh), ("no ethernet header!")); 1411 ETHER_HEADER_COPY(&eh, mtod(m, caddr_t)); 1412 1413 /* 1414 * Insure space for additional headers. First identify 1415 * transmit key to use in calculating any buffer adjustments 1416 * required. This is also used below to do privacy 1417 * encapsulation work. Then calculate the 802.11 header 1418 * size and any padding required by the driver. 1419 * 1420 * Note key may be NULL if we fall back to the default 1421 * transmit key and that is not set. In that case the 1422 * buffer may not be expanded as needed by the cipher 1423 * routines, but they will/should discard it. 1424 */ 1425 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 1426 if (vap->iv_opmode == IEEE80211_M_STA || 1427 !IEEE80211_IS_MULTICAST(eh.ether_dhost) || 1428 (vap->iv_opmode == IEEE80211_M_WDS && 1429 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY))) 1430 key = ieee80211_crypto_getucastkey(vap, ni); 1431 else 1432 key = ieee80211_crypto_getmcastkey(vap, ni); 1433 if (key == NULL && (m->m_flags & M_EAPOL) == 0) { 1434 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, 1435 eh.ether_dhost, 1436 "no default transmit key (%s) deftxkey %u", 1437 __func__, vap->iv_def_txkey); 1438 vap->iv_stats.is_tx_nodefkey++; 1439 goto bad; 1440 } 1441 } else 1442 key = NULL; 1443 /* 1444 * XXX Some ap's don't handle QoS-encapsulated EAPOL 1445 * frames so suppress use. This may be an issue if other 1446 * ap's require all data frames to be QoS-encapsulated 1447 * once negotiated in which case we'll need to make this 1448 * configurable. 1449 * 1450 * Don't send multicast QoS frames. 1451 * Technically multicast frames can be QoS if all stations in the 1452 * BSS are also QoS. 1453 * 1454 * NB: mesh data frames are QoS, including multicast frames. 1455 */ 1456 addqos = 1457 (((is_mcast == 0) && (ni->ni_flags & 1458 (IEEE80211_NODE_QOS|IEEE80211_NODE_HT))) || 1459 (vap->iv_opmode == IEEE80211_M_MBSS)) && 1460 (m->m_flags & M_EAPOL) == 0; 1461 1462 if (addqos) 1463 hdrsize = sizeof(struct ieee80211_qosframe); 1464 else 1465 hdrsize = sizeof(struct ieee80211_frame); 1466 #ifdef IEEE80211_SUPPORT_MESH 1467 if (vap->iv_opmode == IEEE80211_M_MBSS) { 1468 /* 1469 * Mesh data frames are encapsulated according to the 1470 * rules of Section 11B.8.5 (p.139 of D3.0 spec). 1471 * o Group Addressed data (aka multicast) originating 1472 * at the local sta are sent w/ 3-address format and 1473 * address extension mode 00 1474 * o Individually Addressed data (aka unicast) originating 1475 * at the local sta are sent w/ 4-address format and 1476 * address extension mode 00 1477 * o Group Addressed data forwarded from a non-mesh sta are 1478 * sent w/ 3-address format and address extension mode 01 1479 * o Individually Address data from another sta are sent 1480 * w/ 4-address format and address extension mode 10 1481 */ 1482 is4addr = 0; /* NB: don't use, disable */ 1483 if (!IEEE80211_IS_MULTICAST(eh.ether_dhost)) { 1484 rt = ieee80211_mesh_rt_find(vap, eh.ether_dhost); 1485 KASSERT(rt != NULL, ("route is NULL")); 1486 dir = IEEE80211_FC1_DIR_DSTODS; 1487 hdrsize += IEEE80211_ADDR_LEN; 1488 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { 1489 if (IEEE80211_ADDR_EQ(rt->rt_mesh_gate, 1490 vap->iv_myaddr)) { 1491 IEEE80211_NOTE_MAC(vap, 1492 IEEE80211_MSG_MESH, 1493 eh.ether_dhost, 1494 "%s", "trying to send to ourself"); 1495 goto bad; 1496 } 1497 meshae = IEEE80211_MESH_AE_10; 1498 meshhdrsize = 1499 sizeof(struct ieee80211_meshcntl_ae10); 1500 } else { 1501 meshae = IEEE80211_MESH_AE_00; 1502 meshhdrsize = 1503 sizeof(struct ieee80211_meshcntl); 1504 } 1505 } else { 1506 dir = IEEE80211_FC1_DIR_FROMDS; 1507 if (!IEEE80211_ADDR_EQ(eh.ether_shost, vap->iv_myaddr)) { 1508 /* proxy group */ 1509 meshae = IEEE80211_MESH_AE_01; 1510 meshhdrsize = 1511 sizeof(struct ieee80211_meshcntl_ae01); 1512 } else { 1513 /* group */ 1514 meshae = IEEE80211_MESH_AE_00; 1515 meshhdrsize = sizeof(struct ieee80211_meshcntl); 1516 } 1517 } 1518 } else { 1519 #endif 1520 /* 1521 * 4-address frames need to be generated for: 1522 * o packets sent through a WDS vap (IEEE80211_M_WDS) 1523 * o packets sent through a vap marked for relaying 1524 * (e.g. a station operating with dynamic WDS) 1525 */ 1526 is4addr = vap->iv_opmode == IEEE80211_M_WDS || 1527 ((vap->iv_flags_ext & IEEE80211_FEXT_4ADDR) && 1528 !IEEE80211_ADDR_EQ(eh.ether_shost, vap->iv_myaddr)); 1529 if (is4addr) 1530 hdrsize += IEEE80211_ADDR_LEN; 1531 meshhdrsize = meshae = 0; 1532 #ifdef IEEE80211_SUPPORT_MESH 1533 } 1534 #endif 1535 /* 1536 * Honor driver DATAPAD requirement. 1537 */ 1538 if (ic->ic_flags & IEEE80211_F_DATAPAD) 1539 hdrspace = roundup(hdrsize, sizeof(uint32_t)); 1540 else 1541 hdrspace = hdrsize; 1542 1543 if (__predict_true((m->m_flags & M_FF) == 0)) { 1544 /* 1545 * Normal frame. 1546 */ 1547 m = ieee80211_mbuf_adjust(vap, hdrspace + meshhdrsize, key, m); 1548 if (m == NULL) { 1549 /* NB: ieee80211_mbuf_adjust handles msgs+statistics */ 1550 goto bad; 1551 } 1552 /* NB: this could be optimized 'cuz of ieee80211_mbuf_adjust */ 1553 m_adj(m, sizeof(struct ether_header) - sizeof(struct llc)); 1554 llc = mtod(m, struct llc *); 1555 llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP; 1556 llc->llc_control = LLC_UI; 1557 llc->llc_snap.org_code[0] = 0; 1558 llc->llc_snap.org_code[1] = 0; 1559 llc->llc_snap.org_code[2] = 0; 1560 llc->llc_snap.ether_type = eh.ether_type; 1561 } else { 1562 #ifdef IEEE80211_SUPPORT_SUPERG 1563 /* 1564 * Aggregated frame. Check if it's for AMSDU or FF. 1565 * 1566 * XXX TODO: IEEE80211_NODE_AMSDU* isn't implemented 1567 * anywhere for some reason. But, since 11n requires 1568 * AMSDU RX, we can just assume "11n" == "AMSDU". 1569 */ 1570 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG, "%s: called; M_FF\n", __func__); 1571 if (ieee80211_amsdu_tx_ok(ni)) { 1572 m = ieee80211_amsdu_encap(vap, m, hdrspace + meshhdrsize, key); 1573 is_amsdu = 1; 1574 } else { 1575 m = ieee80211_ff_encap(vap, m, hdrspace + meshhdrsize, key); 1576 } 1577 if (m == NULL) 1578 #endif 1579 goto bad; 1580 } 1581 datalen = m->m_pkthdr.len; /* NB: w/o 802.11 header */ 1582 1583 M_PREPEND(m, hdrspace + meshhdrsize, M_NOWAIT); 1584 if (m == NULL) { 1585 vap->iv_stats.is_tx_nobuf++; 1586 goto bad; 1587 } 1588 wh = mtod(m, struct ieee80211_frame *); 1589 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_DATA; 1590 *(uint16_t *)wh->i_dur = 0; 1591 qos = NULL; /* NB: quiet compiler */ 1592 if (is4addr) { 1593 wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS; 1594 IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_macaddr); 1595 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); 1596 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_dhost); 1597 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, eh.ether_shost); 1598 } else switch (vap->iv_opmode) { 1599 case IEEE80211_M_STA: 1600 wh->i_fc[1] = IEEE80211_FC1_DIR_TODS; 1601 IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_bssid); 1602 IEEE80211_ADDR_COPY(wh->i_addr2, eh.ether_shost); 1603 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_dhost); 1604 break; 1605 case IEEE80211_M_IBSS: 1606 case IEEE80211_M_AHDEMO: 1607 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 1608 IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost); 1609 IEEE80211_ADDR_COPY(wh->i_addr2, eh.ether_shost); 1610 /* 1611 * NB: always use the bssid from iv_bss as the 1612 * neighbor's may be stale after an ibss merge 1613 */ 1614 IEEE80211_ADDR_COPY(wh->i_addr3, vap->iv_bss->ni_bssid); 1615 break; 1616 case IEEE80211_M_HOSTAP: 1617 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS; 1618 IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost); 1619 IEEE80211_ADDR_COPY(wh->i_addr2, ni->ni_bssid); 1620 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_shost); 1621 break; 1622 #ifdef IEEE80211_SUPPORT_MESH 1623 case IEEE80211_M_MBSS: 1624 /* NB: offset by hdrspace to deal with DATAPAD */ 1625 mc = (struct ieee80211_meshcntl_ae10 *) 1626 (mtod(m, uint8_t *) + hdrspace); 1627 wh->i_fc[1] = dir; 1628 switch (meshae) { 1629 case IEEE80211_MESH_AE_00: /* no proxy */ 1630 mc->mc_flags = 0; 1631 if (dir == IEEE80211_FC1_DIR_DSTODS) { /* ucast */ 1632 IEEE80211_ADDR_COPY(wh->i_addr1, 1633 ni->ni_macaddr); 1634 IEEE80211_ADDR_COPY(wh->i_addr2, 1635 vap->iv_myaddr); 1636 IEEE80211_ADDR_COPY(wh->i_addr3, 1637 eh.ether_dhost); 1638 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, 1639 eh.ether_shost); 1640 qos =((struct ieee80211_qosframe_addr4 *) 1641 wh)->i_qos; 1642 } else if (dir == IEEE80211_FC1_DIR_FROMDS) { 1643 /* mcast */ 1644 IEEE80211_ADDR_COPY(wh->i_addr1, 1645 eh.ether_dhost); 1646 IEEE80211_ADDR_COPY(wh->i_addr2, 1647 vap->iv_myaddr); 1648 IEEE80211_ADDR_COPY(wh->i_addr3, 1649 eh.ether_shost); 1650 qos = ((struct ieee80211_qosframe *) 1651 wh)->i_qos; 1652 } 1653 break; 1654 case IEEE80211_MESH_AE_01: /* mcast, proxy */ 1655 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS; 1656 IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost); 1657 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); 1658 IEEE80211_ADDR_COPY(wh->i_addr3, vap->iv_myaddr); 1659 mc->mc_flags = 1; 1660 IEEE80211_ADDR_COPY(MC01(mc)->mc_addr4, 1661 eh.ether_shost); 1662 qos = ((struct ieee80211_qosframe *) wh)->i_qos; 1663 break; 1664 case IEEE80211_MESH_AE_10: /* ucast, proxy */ 1665 KASSERT(rt != NULL, ("route is NULL")); 1666 IEEE80211_ADDR_COPY(wh->i_addr1, rt->rt_nexthop); 1667 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); 1668 IEEE80211_ADDR_COPY(wh->i_addr3, rt->rt_mesh_gate); 1669 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, vap->iv_myaddr); 1670 mc->mc_flags = IEEE80211_MESH_AE_10; 1671 IEEE80211_ADDR_COPY(mc->mc_addr5, eh.ether_dhost); 1672 IEEE80211_ADDR_COPY(mc->mc_addr6, eh.ether_shost); 1673 qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos; 1674 break; 1675 default: 1676 KASSERT(0, ("meshae %d", meshae)); 1677 break; 1678 } 1679 mc->mc_ttl = ms->ms_ttl; 1680 ms->ms_seq++; 1681 le32enc(mc->mc_seq, ms->ms_seq); 1682 break; 1683 #endif 1684 case IEEE80211_M_WDS: /* NB: is4addr should always be true */ 1685 default: 1686 goto bad; 1687 } 1688 if (m->m_flags & M_MORE_DATA) 1689 wh->i_fc[1] |= IEEE80211_FC1_MORE_DATA; 1690 if (addqos) { 1691 int ac, tid; 1692 1693 if (is4addr) { 1694 qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos; 1695 /* NB: mesh case handled earlier */ 1696 } else if (vap->iv_opmode != IEEE80211_M_MBSS) 1697 qos = ((struct ieee80211_qosframe *) wh)->i_qos; 1698 ac = M_WME_GETAC(m); 1699 /* map from access class/queue to 11e header priorty value */ 1700 tid = WME_AC_TO_TID(ac); 1701 qos[0] = tid & IEEE80211_QOS_TID; 1702 if (ic->ic_wme.wme_wmeChanParams.cap_wmeParams[ac].wmep_noackPolicy) 1703 qos[0] |= IEEE80211_QOS_ACKPOLICY_NOACK; 1704 #ifdef IEEE80211_SUPPORT_MESH 1705 if (vap->iv_opmode == IEEE80211_M_MBSS) 1706 qos[1] = IEEE80211_QOS_MC; 1707 else 1708 #endif 1709 qos[1] = 0; 1710 wh->i_fc[0] |= IEEE80211_FC0_SUBTYPE_QOS; 1711 1712 /* 1713 * If this is an A-MSDU then ensure we set the 1714 * relevant field. 1715 */ 1716 if (is_amsdu) 1717 qos[0] |= IEEE80211_QOS_AMSDU; 1718 1719 /* 1720 * XXX TODO TX lock is needed for atomic updates of sequence 1721 * numbers. If the driver does it, then don't do it here; 1722 * and we don't need the TX lock held. 1723 */ 1724 if ((m->m_flags & M_AMPDU_MPDU) == 0) { 1725 /* 1726 * 802.11-2012 9.3.2.10 - 1727 * 1728 * If this is a multicast frame then we need 1729 * to ensure that the sequence number comes from 1730 * a separate seqno space and not the TID space. 1731 * 1732 * Otherwise multicast frames may actually cause 1733 * holes in the TX blockack window space and 1734 * upset various things. 1735 */ 1736 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) 1737 seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]++; 1738 else 1739 seqno = ni->ni_txseqs[tid]++; 1740 1741 /* 1742 * NB: don't assign a sequence # to potential 1743 * aggregates; we expect this happens at the 1744 * point the frame comes off any aggregation q 1745 * as otherwise we may introduce holes in the 1746 * BA sequence space and/or make window accouting 1747 * more difficult. 1748 * 1749 * XXX may want to control this with a driver 1750 * capability; this may also change when we pull 1751 * aggregation up into net80211 1752 */ 1753 seqno = ni->ni_txseqs[tid]++; 1754 *(uint16_t *)wh->i_seq = 1755 htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); 1756 M_SEQNO_SET(m, seqno); 1757 } else { 1758 /* NB: zero out i_seq field (for s/w encryption etc) */ 1759 *(uint16_t *)wh->i_seq = 0; 1760 } 1761 } else { 1762 /* 1763 * XXX TODO TX lock is needed for atomic updates of sequence 1764 * numbers. If the driver does it, then don't do it here; 1765 * and we don't need the TX lock held. 1766 */ 1767 seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]++; 1768 *(uint16_t *)wh->i_seq = 1769 htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); 1770 M_SEQNO_SET(m, seqno); 1771 1772 /* 1773 * XXX TODO: we shouldn't allow EAPOL, etc that would 1774 * be forced to be non-QoS traffic to be A-MSDU encapsulated. 1775 */ 1776 if (is_amsdu) 1777 printf("%s: XXX ERROR: is_amsdu set; not QoS!\n", 1778 __func__); 1779 } 1780 1781 /* 1782 * Check if xmit fragmentation is required. 1783 * 1784 * If the hardware does fragmentation offload, then don't bother 1785 * doing it here. 1786 */ 1787 if (IEEE80211_CONF_FRAG_OFFLOAD(ic)) 1788 txfrag = 0; 1789 else 1790 txfrag = (m->m_pkthdr.len > vap->iv_fragthreshold && 1791 !IEEE80211_IS_MULTICAST(wh->i_addr1) && 1792 (vap->iv_caps & IEEE80211_C_TXFRAG) && 1793 (m->m_flags & (M_FF | M_AMPDU_MPDU)) == 0); 1794 1795 if (key != NULL) { 1796 /* 1797 * IEEE 802.1X: send EAPOL frames always in the clear. 1798 * WPA/WPA2: encrypt EAPOL keys when pairwise keys are set. 1799 */ 1800 if ((m->m_flags & M_EAPOL) == 0 || 1801 ((vap->iv_flags & IEEE80211_F_WPA) && 1802 (vap->iv_opmode == IEEE80211_M_STA ? 1803 !IEEE80211_KEY_UNDEFINED(key) : 1804 !IEEE80211_KEY_UNDEFINED(&ni->ni_ucastkey)))) { 1805 wh->i_fc[1] |= IEEE80211_FC1_PROTECTED; 1806 if (!ieee80211_crypto_enmic(vap, key, m, txfrag)) { 1807 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, 1808 eh.ether_dhost, 1809 "%s", "enmic failed, discard frame"); 1810 vap->iv_stats.is_crypto_enmicfail++; 1811 goto bad; 1812 } 1813 } 1814 } 1815 if (txfrag && !ieee80211_fragment(vap, m, hdrsize, 1816 key != NULL ? key->wk_cipher->ic_header : 0, vap->iv_fragthreshold)) 1817 goto bad; 1818 1819 m->m_flags |= M_ENCAP; /* mark encapsulated */ 1820 1821 IEEE80211_NODE_STAT(ni, tx_data); 1822 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1823 IEEE80211_NODE_STAT(ni, tx_mcast); 1824 m->m_flags |= M_MCAST; 1825 } else 1826 IEEE80211_NODE_STAT(ni, tx_ucast); 1827 IEEE80211_NODE_STAT_ADD(ni, tx_bytes, datalen); 1828 1829 return m; 1830 bad: 1831 if (m != NULL) 1832 m_freem(m); 1833 return NULL; 1834 #undef WH4 1835 #undef MC01 1836 } 1837 1838 void 1839 ieee80211_free_mbuf(struct mbuf *m) 1840 { 1841 struct mbuf *next; 1842 1843 if (m == NULL) 1844 return; 1845 1846 do { 1847 next = m->m_nextpkt; 1848 m->m_nextpkt = NULL; 1849 m_freem(m); 1850 } while ((m = next) != NULL); 1851 } 1852 1853 /* 1854 * Fragment the frame according to the specified mtu. 1855 * The size of the 802.11 header (w/o padding) is provided 1856 * so we don't need to recalculate it. We create a new 1857 * mbuf for each fragment and chain it through m_nextpkt; 1858 * we might be able to optimize this by reusing the original 1859 * packet's mbufs but that is significantly more complicated. 1860 */ 1861 static int 1862 ieee80211_fragment(struct ieee80211vap *vap, struct mbuf *m0, 1863 u_int hdrsize, u_int ciphdrsize, u_int mtu) 1864 { 1865 struct ieee80211com *ic = vap->iv_ic; 1866 struct ieee80211_frame *wh, *whf; 1867 struct mbuf *m, *prev; 1868 u_int totalhdrsize, fragno, fragsize, off, remainder, payload; 1869 u_int hdrspace; 1870 1871 KASSERT(m0->m_nextpkt == NULL, ("mbuf already chained?")); 1872 KASSERT(m0->m_pkthdr.len > mtu, 1873 ("pktlen %u mtu %u", m0->m_pkthdr.len, mtu)); 1874 1875 /* 1876 * Honor driver DATAPAD requirement. 1877 */ 1878 if (ic->ic_flags & IEEE80211_F_DATAPAD) 1879 hdrspace = roundup(hdrsize, sizeof(uint32_t)); 1880 else 1881 hdrspace = hdrsize; 1882 1883 wh = mtod(m0, struct ieee80211_frame *); 1884 /* NB: mark the first frag; it will be propagated below */ 1885 wh->i_fc[1] |= IEEE80211_FC1_MORE_FRAG; 1886 totalhdrsize = hdrspace + ciphdrsize; 1887 fragno = 1; 1888 off = mtu - ciphdrsize; 1889 remainder = m0->m_pkthdr.len - off; 1890 prev = m0; 1891 do { 1892 fragsize = MIN(totalhdrsize + remainder, mtu); 1893 #if __FreeBSD__ 1894 m = m_get2(fragsize, M_NOWAIT, MT_DATA, M_PKTHDR); 1895 #elif __NetBSD__ 1896 m = m_get(M_NOWAIT, MT_DATA); 1897 #endif 1898 if (m == NULL) 1899 goto bad; 1900 /* leave room to prepend any cipher header */ 1901 m_align(m, fragsize - ciphdrsize); 1902 1903 /* 1904 * Form the header in the fragment. Note that since 1905 * we mark the first fragment with the MORE_FRAG bit 1906 * it automatically is propagated to each fragment; we 1907 * need only clear it on the last fragment (done below). 1908 * NB: frag 1+ dont have Mesh Control field present. 1909 */ 1910 whf = mtod(m, struct ieee80211_frame *); 1911 memcpy(whf, wh, hdrsize); 1912 #ifdef IEEE80211_SUPPORT_MESH 1913 if (vap->iv_opmode == IEEE80211_M_MBSS) { 1914 if (IEEE80211_IS_DSTODS(wh)) 1915 ((struct ieee80211_qosframe_addr4 *) 1916 whf)->i_qos[1] &= ~IEEE80211_QOS_MC; 1917 else 1918 ((struct ieee80211_qosframe *) 1919 whf)->i_qos[1] &= ~IEEE80211_QOS_MC; 1920 } 1921 #endif 1922 *(uint16_t *)&whf->i_seq[0] |= htole16( 1923 (fragno & IEEE80211_SEQ_FRAG_MASK) << 1924 IEEE80211_SEQ_FRAG_SHIFT); 1925 fragno++; 1926 1927 payload = fragsize - totalhdrsize; 1928 /* NB: destination is known to be contiguous */ 1929 1930 m_copydata(m0, off, payload, mtod(m, uint8_t *) + hdrspace); 1931 m->m_len = hdrspace + payload; 1932 m->m_pkthdr.len = hdrspace + payload; 1933 m->m_flags |= M_FRAG; 1934 1935 /* chain up the fragment */ 1936 prev->m_nextpkt = m; 1937 prev = m; 1938 1939 /* deduct fragment just formed */ 1940 remainder -= payload; 1941 off += payload; 1942 } while (remainder != 0); 1943 1944 /* set the last fragment */ 1945 m->m_flags |= M_LASTFRAG; 1946 whf->i_fc[1] &= ~IEEE80211_FC1_MORE_FRAG; 1947 1948 /* strip first mbuf now that everything has been copied */ 1949 m_adj(m0, -(m0->m_pkthdr.len - (mtu - ciphdrsize))); 1950 m0->m_flags |= M_FIRSTFRAG | M_FRAG; 1951 1952 vap->iv_stats.is_tx_fragframes++; 1953 vap->iv_stats.is_tx_frags += fragno-1; 1954 1955 return 1; 1956 bad: 1957 /* reclaim fragments but leave original frame for caller to free */ 1958 ieee80211_free_mbuf(m0->m_nextpkt); 1959 m0->m_nextpkt = NULL; 1960 return 0; 1961 } 1962 1963 /* 1964 * Add a supported rates element id to a frame. 1965 */ 1966 uint8_t * 1967 ieee80211_add_rates(uint8_t *frm, const struct ieee80211_rateset *rs) 1968 { 1969 int nrates; 1970 1971 *frm++ = IEEE80211_ELEMID_RATES; 1972 nrates = rs->rs_nrates; 1973 if (nrates > IEEE80211_RATE_SIZE) 1974 nrates = IEEE80211_RATE_SIZE; 1975 *frm++ = nrates; 1976 memcpy(frm, rs->rs_rates, nrates); 1977 return frm + nrates; 1978 } 1979 1980 /* 1981 * Add an extended supported rates element id to a frame. 1982 */ 1983 uint8_t * 1984 ieee80211_add_xrates(uint8_t *frm, const struct ieee80211_rateset *rs) 1985 { 1986 /* 1987 * Add an extended supported rates element if operating in 11g mode. 1988 */ 1989 if (rs->rs_nrates > IEEE80211_RATE_SIZE) { 1990 int nrates = rs->rs_nrates - IEEE80211_RATE_SIZE; 1991 *frm++ = IEEE80211_ELEMID_XRATES; 1992 *frm++ = nrates; 1993 memcpy(frm, rs->rs_rates + IEEE80211_RATE_SIZE, nrates); 1994 frm += nrates; 1995 } 1996 return frm; 1997 } 1998 1999 /* 2000 * Add an ssid element to a frame. 2001 */ 2002 uint8_t * 2003 ieee80211_add_ssid(uint8_t *frm, const uint8_t *ssid, u_int len) 2004 { 2005 *frm++ = IEEE80211_ELEMID_SSID; 2006 *frm++ = len; 2007 memcpy(frm, ssid, len); 2008 return frm + len; 2009 } 2010 2011 /* 2012 * Add an erp element to a frame. 2013 */ 2014 static uint8_t * 2015 ieee80211_add_erp(uint8_t *frm, struct ieee80211com *ic) 2016 { 2017 uint8_t erp; 2018 2019 *frm++ = IEEE80211_ELEMID_ERP; 2020 *frm++ = 1; 2021 erp = 0; 2022 if (ic->ic_nonerpsta != 0) 2023 erp |= IEEE80211_ERP_NON_ERP_PRESENT; 2024 if (ic->ic_flags & IEEE80211_F_USEPROT) 2025 erp |= IEEE80211_ERP_USE_PROTECTION; 2026 if (ic->ic_flags & IEEE80211_F_USEBARKER) 2027 erp |= IEEE80211_ERP_LONG_PREAMBLE; 2028 *frm++ = erp; 2029 return frm; 2030 } 2031 2032 /* 2033 * Add a CFParams element to a frame. 2034 */ 2035 static uint8_t * 2036 ieee80211_add_cfparms(uint8_t *frm, struct ieee80211com *ic) 2037 { 2038 #define ADDSHORT(frm, v) do { \ 2039 le16enc(frm, v); \ 2040 frm += 2; \ 2041 } while (0) 2042 *frm++ = IEEE80211_ELEMID_CFPARMS; 2043 *frm++ = 6; 2044 *frm++ = 0; /* CFP count */ 2045 *frm++ = 2; /* CFP period */ 2046 ADDSHORT(frm, 0); /* CFP MaxDuration (TU) */ 2047 ADDSHORT(frm, 0); /* CFP CurRemaining (TU) */ 2048 return frm; 2049 #undef ADDSHORT 2050 } 2051 2052 static __inline uint8_t * 2053 add_appie(uint8_t *frm, const struct ieee80211_appie *ie) 2054 { 2055 memcpy(frm, ie->ie_data, ie->ie_len); 2056 return frm + ie->ie_len; 2057 } 2058 2059 static __inline uint8_t * 2060 add_ie(uint8_t *frm, const uint8_t *ie) 2061 { 2062 memcpy(frm, ie, 2 + ie[1]); 2063 return frm + 2 + ie[1]; 2064 } 2065 2066 #define WME_OUI_BYTES 0x00, 0x50, 0xf2 2067 /* 2068 * Add a WME information element to a frame. 2069 */ 2070 uint8_t * 2071 ieee80211_add_wme_info(uint8_t *frm, struct ieee80211_wme_state *wme) 2072 { 2073 static const struct ieee80211_wme_info info = { 2074 .wme_id = IEEE80211_ELEMID_VENDOR, 2075 .wme_len = sizeof(struct ieee80211_wme_info) - 2, 2076 .wme_oui = { WME_OUI_BYTES }, 2077 .wme_type = WME_OUI_TYPE, 2078 .wme_subtype = WME_INFO_OUI_SUBTYPE, 2079 .wme_version = WME_VERSION, 2080 .wme_info = 0, 2081 }; 2082 memcpy(frm, &info, sizeof(info)); 2083 return frm + sizeof(info); 2084 } 2085 2086 /* 2087 * Add a WME parameters element to a frame. 2088 */ 2089 static uint8_t * 2090 ieee80211_add_wme_param(uint8_t *frm, struct ieee80211_wme_state *wme) 2091 { 2092 #define SM(_v, _f) (((_v) << _f##_S) & _f) 2093 #define ADDSHORT(frm, v) do { \ 2094 le16enc(frm, v); \ 2095 frm += 2; \ 2096 } while (0) 2097 /* NB: this works 'cuz a param has an info at the front */ 2098 static const struct ieee80211_wme_info param = { 2099 .wme_id = IEEE80211_ELEMID_VENDOR, 2100 .wme_len = sizeof(struct ieee80211_wme_param) - 2, 2101 .wme_oui = { WME_OUI_BYTES }, 2102 .wme_type = WME_OUI_TYPE, 2103 .wme_subtype = WME_PARAM_OUI_SUBTYPE, 2104 .wme_version = WME_VERSION, 2105 }; 2106 int i; 2107 2108 memcpy(frm, ¶m, sizeof(param)); 2109 frm += __offsetof(struct ieee80211_wme_info, wme_info); 2110 *frm++ = wme->wme_bssChanParams.cap_info; /* AC info */ 2111 *frm++ = 0; /* reserved field */ 2112 for (i = 0; i < WME_NUM_AC; i++) { 2113 const struct wmeParams *ac = 2114 &wme->wme_bssChanParams.cap_wmeParams[i]; 2115 *frm++ = SM(i, WME_PARAM_ACI) 2116 | SM(ac->wmep_acm, WME_PARAM_ACM) 2117 | SM(ac->wmep_aifsn, WME_PARAM_AIFSN) 2118 ; 2119 *frm++ = SM(ac->wmep_logcwmax, WME_PARAM_LOGCWMAX) 2120 | SM(ac->wmep_logcwmin, WME_PARAM_LOGCWMIN) 2121 ; 2122 ADDSHORT(frm, ac->wmep_txopLimit); 2123 } 2124 return frm; 2125 #undef SM 2126 #undef ADDSHORT 2127 } 2128 #undef WME_OUI_BYTES 2129 2130 /* 2131 * Add an 11h Power Constraint element to a frame. 2132 */ 2133 static uint8_t * 2134 ieee80211_add_powerconstraint(uint8_t *frm, struct ieee80211vap *vap) 2135 { 2136 const struct ieee80211_channel *c = vap->iv_bss->ni_chan; 2137 /* XXX per-vap tx power limit? */ 2138 int8_t limit = vap->iv_ic->ic_txpowlimit / 2; 2139 2140 frm[0] = IEEE80211_ELEMID_PWRCNSTR; 2141 frm[1] = 1; 2142 frm[2] = c->ic_maxregpower > limit ? c->ic_maxregpower - limit : 0; 2143 return frm + 3; 2144 } 2145 2146 /* 2147 * Add an 11h Power Capability element to a frame. 2148 */ 2149 static uint8_t * 2150 ieee80211_add_powercapability(uint8_t *frm, const struct ieee80211_channel *c) 2151 { 2152 frm[0] = IEEE80211_ELEMID_PWRCAP; 2153 frm[1] = 2; 2154 frm[2] = c->ic_minpower; 2155 frm[3] = c->ic_maxpower; 2156 return frm + 4; 2157 } 2158 2159 /* 2160 * Add an 11h Supported Channels element to a frame. 2161 */ 2162 static uint8_t * 2163 ieee80211_add_supportedchannels(uint8_t *frm, struct ieee80211com *ic) 2164 { 2165 static const int ielen = 26; 2166 2167 frm[0] = IEEE80211_ELEMID_SUPPCHAN; 2168 frm[1] = ielen; 2169 /* XXX not correct */ 2170 memcpy(frm+2, ic->ic_chan_avail, ielen); 2171 return frm + 2 + ielen; 2172 } 2173 2174 /* 2175 * Add an 11h Quiet time element to a frame. 2176 */ 2177 static uint8_t * 2178 ieee80211_add_quiet(uint8_t *frm, struct ieee80211vap *vap, int update) 2179 { 2180 struct ieee80211_quiet_ie *quiet = (struct ieee80211_quiet_ie *) frm; 2181 2182 quiet->quiet_ie = IEEE80211_ELEMID_QUIET; 2183 quiet->len = 6; 2184 2185 /* 2186 * Only update every beacon interval - otherwise probe responses 2187 * would update the quiet count value. 2188 */ 2189 if (update) { 2190 if (vap->iv_quiet_count_value == 1) 2191 vap->iv_quiet_count_value = vap->iv_quiet_count; 2192 else if (vap->iv_quiet_count_value > 1) 2193 vap->iv_quiet_count_value--; 2194 } 2195 2196 if (vap->iv_quiet_count_value == 0) { 2197 /* value 0 is reserved as per 802.11h standerd */ 2198 vap->iv_quiet_count_value = 1; 2199 } 2200 2201 quiet->tbttcount = vap->iv_quiet_count_value; 2202 quiet->period = vap->iv_quiet_period; 2203 quiet->duration = htole16(vap->iv_quiet_duration); 2204 quiet->offset = htole16(vap->iv_quiet_offset); 2205 return frm + sizeof(*quiet); 2206 } 2207 2208 /* 2209 * Add an 11h Channel Switch Announcement element to a frame. 2210 * Note that we use the per-vap CSA count to adjust the global 2211 * counter so we can use this routine to form probe response 2212 * frames and get the current count. 2213 */ 2214 static uint8_t * 2215 ieee80211_add_csa(uint8_t *frm, struct ieee80211vap *vap) 2216 { 2217 struct ieee80211com *ic = vap->iv_ic; 2218 struct ieee80211_csa_ie *csa = (struct ieee80211_csa_ie *) frm; 2219 2220 csa->csa_ie = IEEE80211_ELEMID_CSA; 2221 csa->csa_len = 3; 2222 csa->csa_mode = 1; /* XXX force quiet on channel */ 2223 csa->csa_newchan = ieee80211_chan2ieee(ic, ic->ic_csa_newchan); 2224 csa->csa_count = ic->ic_csa_count - vap->iv_csa_count; 2225 return frm + sizeof(*csa); 2226 } 2227 2228 /* 2229 * Add an 11h country information element to a frame. 2230 */ 2231 static uint8_t * 2232 ieee80211_add_countryie(uint8_t *frm, struct ieee80211com *ic) 2233 { 2234 2235 if (ic->ic_countryie == NULL || 2236 ic->ic_countryie_chan != ic->ic_bsschan) { 2237 /* 2238 * Handle lazy construction of ie. This is done on 2239 * first use and after a channel change that requires 2240 * re-calculation. 2241 */ 2242 if (ic->ic_countryie != NULL) 2243 IEEE80211_FREE(ic->ic_countryie, M_80211_NODE_IE); 2244 ic->ic_countryie = ieee80211_alloc_countryie(ic); 2245 if (ic->ic_countryie == NULL) 2246 return frm; 2247 ic->ic_countryie_chan = ic->ic_bsschan; 2248 } 2249 return add_appie(frm, ic->ic_countryie); 2250 } 2251 2252 uint8_t * 2253 ieee80211_add_wpa(uint8_t *frm, const struct ieee80211vap *vap) 2254 { 2255 if (vap->iv_flags & IEEE80211_F_WPA1 && vap->iv_wpa_ie != NULL) 2256 return (add_ie(frm, vap->iv_wpa_ie)); 2257 else { 2258 /* XXX else complain? */ 2259 return (frm); 2260 } 2261 } 2262 2263 uint8_t * 2264 ieee80211_add_rsn(uint8_t *frm, const struct ieee80211vap *vap) 2265 { 2266 if (vap->iv_flags & IEEE80211_F_WPA2 && vap->iv_rsn_ie != NULL) 2267 return (add_ie(frm, vap->iv_rsn_ie)); 2268 else { 2269 /* XXX else complain? */ 2270 return (frm); 2271 } 2272 } 2273 2274 uint8_t * 2275 ieee80211_add_qos(uint8_t *frm, const struct ieee80211_node *ni) 2276 { 2277 if (ni->ni_flags & IEEE80211_NODE_QOS) { 2278 *frm++ = IEEE80211_ELEMID_QOS; 2279 *frm++ = 1; 2280 *frm++ = 0; 2281 } 2282 2283 return (frm); 2284 } 2285 2286 /* 2287 * Send a probe request frame with the specified ssid 2288 * and any optional information element data. 2289 */ 2290 int 2291 ieee80211_send_probereq(struct ieee80211_node *ni, 2292 const uint8_t sa[IEEE80211_ADDR_LEN], 2293 const uint8_t da[IEEE80211_ADDR_LEN], 2294 const uint8_t bssid[IEEE80211_ADDR_LEN], 2295 const uint8_t *ssid, size_t ssidlen) 2296 { 2297 struct ieee80211vap *vap = ni->ni_vap; 2298 struct ieee80211com *ic = ni->ni_ic; 2299 struct ieee80211_node *bss; 2300 const struct ieee80211_txparam *tp; 2301 struct ieee80211_bpf_params params; 2302 const struct ieee80211_rateset *rs; 2303 struct mbuf *m; 2304 uint8_t *frm; 2305 int ret; 2306 2307 bss = ieee80211_ref_node(vap->iv_bss); 2308 2309 if (vap->iv_state == IEEE80211_S_CAC) { 2310 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni, 2311 "block %s frame in CAC state", "probe request"); 2312 vap->iv_stats.is_tx_badstate++; 2313 ieee80211_free_node(bss); 2314 return EIO; /* XXX */ 2315 } 2316 2317 /* 2318 * Hold a reference on the node so it doesn't go away until after 2319 * the xmit is complete all the way in the driver. On error we 2320 * will remove our reference. 2321 */ 2322 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2323 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", 2324 __func__, __LINE__, 2325 ni, ether_sprintf(ni->ni_macaddr), 2326 ieee80211_node_refcnt(ni)+1); 2327 ieee80211_ref_node(ni); 2328 2329 /* 2330 * prreq frame format 2331 * [tlv] ssid 2332 * [tlv] supported rates 2333 * [tlv] RSN (optional) 2334 * [tlv] extended supported rates 2335 * [tlv] HT cap (optional) 2336 * [tlv] VHT cap (optional) 2337 * [tlv] WPA (optional) 2338 * [tlv] user-specified ie's 2339 */ 2340 m = ieee80211_getmgtframe(&frm, 2341 ic->ic_headroom + sizeof(struct ieee80211_frame), 2342 2 + IEEE80211_NWID_LEN 2343 + 2 + IEEE80211_RATE_SIZE 2344 + sizeof(struct ieee80211_ie_htcap) 2345 + sizeof(struct ieee80211_ie_vhtcap) 2346 + sizeof(struct ieee80211_ie_htinfo) /* XXX not needed? */ 2347 + sizeof(struct ieee80211_ie_wpa) 2348 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2349 + sizeof(struct ieee80211_ie_wpa) 2350 + (vap->iv_appie_probereq != NULL ? 2351 vap->iv_appie_probereq->ie_len : 0) 2352 ); 2353 if (m == NULL) { 2354 vap->iv_stats.is_tx_nobuf++; 2355 ieee80211_free_node(ni); 2356 ieee80211_free_node(bss); 2357 return ENOMEM; 2358 } 2359 2360 frm = ieee80211_add_ssid(frm, ssid, ssidlen); 2361 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2362 frm = ieee80211_add_rates(frm, rs); 2363 frm = ieee80211_add_rsn(frm, vap); 2364 frm = ieee80211_add_xrates(frm, rs); 2365 2366 /* 2367 * Note: we can't use bss; we don't have one yet. 2368 * 2369 * So, we should announce our capabilities 2370 * in this channel mode (2g/5g), not the 2371 * channel details itself. 2372 */ 2373 if ((vap->iv_opmode == IEEE80211_M_IBSS) && 2374 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 2375 struct ieee80211_channel *c; 2376 2377 /* 2378 * Get the HT channel that we should try upgrading to. 2379 * If we can do 40MHz then this'll upgrade it appropriately. 2380 */ 2381 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, 2382 vap->iv_flags_ht); 2383 frm = ieee80211_add_htcap_ch(frm, vap, c); 2384 } 2385 2386 /* 2387 * XXX TODO: need to figure out what/how to update the 2388 * VHT channel. 2389 */ 2390 #if 0 2391 (vap->iv_flags_vht & IEEE80211_FVHT_VHT) { 2392 struct ieee80211_channel *c; 2393 2394 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, 2395 vap->iv_flags_ht); 2396 c = ieee80211_vht_adjust_channel(ic, c, vap->iv_flags_vht); 2397 frm = ieee80211_add_vhtcap_ch(frm, vap, c); 2398 } 2399 #endif 2400 2401 frm = ieee80211_add_wpa(frm, vap); 2402 if (vap->iv_appie_probereq != NULL) 2403 frm = add_appie(frm, vap->iv_appie_probereq); 2404 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2405 2406 KASSERT(M_LEADINGSPACE(m) >= sizeof(struct ieee80211_frame), 2407 ("leading space %zd", M_LEADINGSPACE(m))); 2408 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); 2409 if (m == NULL) { 2410 /* NB: cannot happen */ 2411 ieee80211_free_node(ni); 2412 ieee80211_free_node(bss); 2413 return ENOMEM; 2414 } 2415 2416 IEEE80211_TX_LOCK(ic); 2417 ieee80211_send_setup(ni, m, 2418 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ, 2419 IEEE80211_NONQOS_TID, sa, da, bssid); 2420 /* XXX power management? */ 2421 m->m_flags |= M_ENCAP; /* mark encapsulated */ 2422 2423 M_WME_SETAC(m, WME_AC_BE); 2424 2425 IEEE80211_NODE_STAT(ni, tx_probereq); 2426 IEEE80211_NODE_STAT(ni, tx_mgmt); 2427 2428 IEEE80211_DPRINTF(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS, 2429 "send probe req on channel %u bssid %s sa %6D da %6D ssid \"%.*s\"\n", 2430 ieee80211_chan2ieee(ic, ic->ic_curchan), 2431 ether_sprintf(bssid), 2432 sa, ":", 2433 da, ":", 2434 ssidlen, ssid); 2435 2436 memset(¶ms, 0, sizeof(params)); 2437 params.ibp_pri = M_WME_GETAC(m); 2438 tp = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)]; 2439 params.ibp_rate0 = tp->mgmtrate; 2440 if (IEEE80211_IS_MULTICAST(da)) { 2441 params.ibp_flags |= IEEE80211_BPF_NOACK; 2442 params.ibp_try0 = 1; 2443 } else 2444 params.ibp_try0 = tp->maxretry; 2445 params.ibp_power = ni->ni_txpower; 2446 ret = ieee80211_raw_output(vap, ni, m, ¶ms); 2447 IEEE80211_TX_UNLOCK(ic); 2448 ieee80211_free_node(bss); 2449 return (ret); 2450 } 2451 2452 /* 2453 * Calculate capability information for mgt frames. 2454 */ 2455 uint16_t 2456 ieee80211_getcapinfo(struct ieee80211vap *vap, struct ieee80211_channel *chan) 2457 { 2458 struct ieee80211com *ic = vap->iv_ic; 2459 uint16_t capinfo; 2460 2461 KASSERT(vap->iv_opmode != IEEE80211_M_STA, ("station mode")); 2462 2463 if (vap->iv_opmode == IEEE80211_M_HOSTAP) 2464 capinfo = IEEE80211_CAPINFO_ESS; 2465 else if (vap->iv_opmode == IEEE80211_M_IBSS) 2466 capinfo = IEEE80211_CAPINFO_IBSS; 2467 else 2468 capinfo = 0; 2469 if (vap->iv_flags & IEEE80211_F_PRIVACY) 2470 capinfo |= IEEE80211_CAPINFO_PRIVACY; 2471 if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && 2472 IEEE80211_IS_CHAN_2GHZ(chan)) 2473 capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE; 2474 if (ic->ic_flags & IEEE80211_F_SHSLOT) 2475 capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME; 2476 if (IEEE80211_IS_CHAN_5GHZ(chan) && (vap->iv_flags & IEEE80211_F_DOTH)) 2477 capinfo |= IEEE80211_CAPINFO_SPECTRUM_MGMT; 2478 return capinfo; 2479 } 2480 2481 /* 2482 * Send a management frame. The node is for the destination (or ic_bss 2483 * when in station mode). Nodes other than ic_bss have their reference 2484 * count bumped to reflect our use for an indeterminant time. 2485 */ 2486 int 2487 ieee80211_send_mgmt(struct ieee80211_node *ni, int type, int arg) 2488 { 2489 #define HTFLAGS (IEEE80211_NODE_HT | IEEE80211_NODE_HTCOMPAT) 2490 #define senderr(_x, _v) do { vap->iv_stats._v++; ret = _x; goto bad; } while (0) 2491 struct ieee80211vap *vap = ni->ni_vap; 2492 struct ieee80211com *ic = ni->ni_ic; 2493 struct ieee80211_node *bss = vap->iv_bss; 2494 struct ieee80211_bpf_params params; 2495 struct mbuf *m; 2496 uint8_t *frm; 2497 uint16_t capinfo; 2498 int has_challenge, is_shared_key, ret, status; 2499 2500 KASSERT(ni != NULL, ("null node")); 2501 2502 /* 2503 * Hold a reference on the node so it doesn't go away until after 2504 * the xmit is complete all the way in the driver. On error we 2505 * will remove our reference. 2506 */ 2507 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2508 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", 2509 __func__, __LINE__, 2510 ni, ether_sprintf(ni->ni_macaddr), 2511 ieee80211_node_refcnt(ni)+1); 2512 ieee80211_ref_node(ni); 2513 2514 memset(¶ms, 0, sizeof(params)); 2515 switch (type) { 2516 2517 case IEEE80211_FC0_SUBTYPE_AUTH: 2518 status = arg >> 16; 2519 arg &= 0xffff; 2520 has_challenge = ((arg == IEEE80211_AUTH_SHARED_CHALLENGE || 2521 arg == IEEE80211_AUTH_SHARED_RESPONSE) && 2522 ni->ni_challenge != NULL); 2523 2524 /* 2525 * Deduce whether we're doing open authentication or 2526 * shared key authentication. We do the latter if 2527 * we're in the middle of a shared key authentication 2528 * handshake or if we're initiating an authentication 2529 * request and configured to use shared key. 2530 */ 2531 is_shared_key = has_challenge || 2532 arg >= IEEE80211_AUTH_SHARED_RESPONSE || 2533 (arg == IEEE80211_AUTH_SHARED_REQUEST && 2534 bss->ni_authmode == IEEE80211_AUTH_SHARED); 2535 2536 m = ieee80211_getmgtframe(&frm, 2537 ic->ic_headroom + sizeof(struct ieee80211_frame), 2538 3 * sizeof(uint16_t) 2539 + (has_challenge && status == IEEE80211_STATUS_SUCCESS ? 2540 sizeof(uint16_t)+IEEE80211_CHALLENGE_LEN : 0) 2541 ); 2542 if (m == NULL) 2543 senderr(ENOMEM, is_tx_nobuf); 2544 2545 ((uint16_t *)frm)[0] = 2546 (is_shared_key) ? htole16(IEEE80211_AUTH_ALG_SHARED) 2547 : htole16(IEEE80211_AUTH_ALG_OPEN); 2548 ((uint16_t *)frm)[1] = htole16(arg); /* sequence number */ 2549 ((uint16_t *)frm)[2] = htole16(status);/* status */ 2550 2551 if (has_challenge && status == IEEE80211_STATUS_SUCCESS) { 2552 ((uint16_t *)frm)[3] = 2553 htole16((IEEE80211_CHALLENGE_LEN << 8) | 2554 IEEE80211_ELEMID_CHALLENGE); 2555 memcpy(&((uint16_t *)frm)[4], ni->ni_challenge, 2556 IEEE80211_CHALLENGE_LEN); 2557 m->m_pkthdr.len = m->m_len = 2558 4 * sizeof(uint16_t) + IEEE80211_CHALLENGE_LEN; 2559 if (arg == IEEE80211_AUTH_SHARED_RESPONSE) { 2560 IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni, 2561 "request encrypt frame (%s)", __func__); 2562 /* mark frame for encryption */ 2563 params.ibp_flags |= IEEE80211_BPF_CRYPTO; 2564 } 2565 } else 2566 m->m_pkthdr.len = m->m_len = 3 * sizeof(uint16_t); 2567 2568 /* XXX not right for shared key */ 2569 if (status == IEEE80211_STATUS_SUCCESS) 2570 IEEE80211_NODE_STAT(ni, tx_auth); 2571 else 2572 IEEE80211_NODE_STAT(ni, tx_auth_fail); 2573 2574 if (vap->iv_opmode == IEEE80211_M_STA) 2575 ieee80211_add_callback(m, ieee80211_tx_mgt_cb, 2576 (void *) vap->iv_state); 2577 break; 2578 2579 case IEEE80211_FC0_SUBTYPE_DEAUTH: 2580 IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni, 2581 "send station deauthenticate (reason: %d (%s))", arg, 2582 ieee80211_reason_to_string(arg)); 2583 m = ieee80211_getmgtframe(&frm, 2584 ic->ic_headroom + sizeof(struct ieee80211_frame), 2585 sizeof(uint16_t)); 2586 if (m == NULL) 2587 senderr(ENOMEM, is_tx_nobuf); 2588 *(uint16_t *)frm = htole16(arg); /* reason */ 2589 m->m_pkthdr.len = m->m_len = sizeof(uint16_t); 2590 2591 IEEE80211_NODE_STAT(ni, tx_deauth); 2592 IEEE80211_NODE_STAT_SET(ni, tx_deauth_code, arg); 2593 2594 ieee80211_node_unauthorize(ni); /* port closed */ 2595 break; 2596 2597 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 2598 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 2599 /* 2600 * asreq frame format 2601 * [2] capability information 2602 * [2] listen interval 2603 * [6*] current AP address (reassoc only) 2604 * [tlv] ssid 2605 * [tlv] supported rates 2606 * [tlv] extended supported rates 2607 * [4] power capability (optional) 2608 * [28] supported channels (optional) 2609 * [tlv] HT capabilities 2610 * [tlv] VHT capabilities 2611 * [tlv] WME (optional) 2612 * [tlv] Vendor OUI HT capabilities (optional) 2613 * [tlv] Atheros capabilities (if negotiated) 2614 * [tlv] AppIE's (optional) 2615 */ 2616 m = ieee80211_getmgtframe(&frm, 2617 ic->ic_headroom + sizeof(struct ieee80211_frame), 2618 sizeof(uint16_t) 2619 + sizeof(uint16_t) 2620 + IEEE80211_ADDR_LEN 2621 + 2 + IEEE80211_NWID_LEN 2622 + 2 + IEEE80211_RATE_SIZE 2623 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2624 + 4 2625 + 2 + 26 2626 + sizeof(struct ieee80211_wme_info) 2627 + sizeof(struct ieee80211_ie_htcap) 2628 + sizeof(struct ieee80211_ie_vhtcap) 2629 + 4 + sizeof(struct ieee80211_ie_htcap) 2630 #ifdef IEEE80211_SUPPORT_SUPERG 2631 + sizeof(struct ieee80211_ath_ie) 2632 #endif 2633 + (vap->iv_appie_wpa != NULL ? 2634 vap->iv_appie_wpa->ie_len : 0) 2635 + (vap->iv_appie_assocreq != NULL ? 2636 vap->iv_appie_assocreq->ie_len : 0) 2637 ); 2638 if (m == NULL) 2639 senderr(ENOMEM, is_tx_nobuf); 2640 2641 KASSERT(vap->iv_opmode == IEEE80211_M_STA, 2642 ("wrong mode %u", vap->iv_opmode)); 2643 capinfo = IEEE80211_CAPINFO_ESS; 2644 if (vap->iv_flags & IEEE80211_F_PRIVACY) 2645 capinfo |= IEEE80211_CAPINFO_PRIVACY; 2646 /* 2647 * NB: Some 11a AP's reject the request when 2648 * short preamble is set. 2649 */ 2650 if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && 2651 IEEE80211_IS_CHAN_2GHZ(ic->ic_curchan)) 2652 capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE; 2653 if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 2654 (ic->ic_caps & IEEE80211_C_SHSLOT)) 2655 capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME; 2656 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SPECTRUM_MGMT) && 2657 (vap->iv_flags & IEEE80211_F_DOTH)) 2658 capinfo |= IEEE80211_CAPINFO_SPECTRUM_MGMT; 2659 *(uint16_t *)frm = htole16(capinfo); 2660 frm += 2; 2661 2662 KASSERT(bss->ni_intval != 0, ("beacon interval is zero!")); 2663 *(uint16_t *)frm = htole16(howmany(ic->ic_lintval, 2664 bss->ni_intval)); 2665 frm += 2; 2666 2667 if (type == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) { 2668 IEEE80211_ADDR_COPY(frm, bss->ni_bssid); 2669 frm += IEEE80211_ADDR_LEN; 2670 } 2671 2672 frm = ieee80211_add_ssid(frm, ni->ni_essid, ni->ni_esslen); 2673 frm = ieee80211_add_rates(frm, &ni->ni_rates); 2674 frm = ieee80211_add_rsn(frm, vap); 2675 frm = ieee80211_add_xrates(frm, &ni->ni_rates); 2676 if (capinfo & IEEE80211_CAPINFO_SPECTRUM_MGMT) { 2677 frm = ieee80211_add_powercapability(frm, 2678 ic->ic_curchan); 2679 frm = ieee80211_add_supportedchannels(frm, ic); 2680 } 2681 2682 /* 2683 * Check the channel - we may be using an 11n NIC with an 2684 * 11n capable station, but we're configured to be an 11b 2685 * channel. 2686 */ 2687 if ((vap->iv_flags_ht & IEEE80211_FHT_HT) && 2688 IEEE80211_IS_CHAN_HT(ni->ni_chan) && 2689 ni->ni_ies.htcap_ie != NULL && 2690 ni->ni_ies.htcap_ie[0] == IEEE80211_ELEMID_HTCAP) { 2691 frm = ieee80211_add_htcap(frm, ni); 2692 } 2693 2694 if ((vap->iv_flags_vht & IEEE80211_FVHT_VHT) && 2695 IEEE80211_IS_CHAN_VHT(ni->ni_chan) && 2696 ni->ni_ies.vhtcap_ie != NULL && 2697 ni->ni_ies.vhtcap_ie[0] == IEEE80211_ELEMID_VHT_CAP) { 2698 frm = ieee80211_add_vhtcap(frm, ni); 2699 } 2700 2701 frm = ieee80211_add_wpa(frm, vap); 2702 if ((ic->ic_flags & IEEE80211_F_WME) && 2703 ni->ni_ies.wme_ie != NULL) 2704 frm = ieee80211_add_wme_info(frm, &ic->ic_wme); 2705 2706 /* 2707 * Same deal - only send HT info if we're on an 11n 2708 * capable channel. 2709 */ 2710 if ((vap->iv_flags_ht & IEEE80211_FHT_HT) && 2711 IEEE80211_IS_CHAN_HT(ni->ni_chan) && 2712 ni->ni_ies.htcap_ie != NULL && 2713 ni->ni_ies.htcap_ie[0] == IEEE80211_ELEMID_VENDOR) { 2714 frm = ieee80211_add_htcap_vendor(frm, ni); 2715 } 2716 #ifdef IEEE80211_SUPPORT_SUPERG 2717 if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS)) { 2718 frm = ieee80211_add_ath(frm, 2719 IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS), 2720 ((vap->iv_flags & IEEE80211_F_WPA) == 0 && 2721 ni->ni_authmode != IEEE80211_AUTH_8021X) ? 2722 vap->iv_def_txkey : IEEE80211_KEYIX_NONE); 2723 } 2724 #endif /* IEEE80211_SUPPORT_SUPERG */ 2725 if (vap->iv_appie_assocreq != NULL) 2726 frm = add_appie(frm, vap->iv_appie_assocreq); 2727 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2728 2729 ieee80211_add_callback(m, ieee80211_tx_mgt_cb, 2730 (void *) vap->iv_state); 2731 break; 2732 2733 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 2734 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 2735 /* 2736 * asresp frame format 2737 * [2] capability information 2738 * [2] status 2739 * [2] association ID 2740 * [tlv] supported rates 2741 * [tlv] extended supported rates 2742 * [tlv] HT capabilities (standard, if STA enabled) 2743 * [tlv] HT information (standard, if STA enabled) 2744 * [tlv] VHT capabilities (standard, if STA enabled) 2745 * [tlv] VHT information (standard, if STA enabled) 2746 * [tlv] WME (if configured and STA enabled) 2747 * [tlv] HT capabilities (vendor OUI, if STA enabled) 2748 * [tlv] HT information (vendor OUI, if STA enabled) 2749 * [tlv] Atheros capabilities (if STA enabled) 2750 * [tlv] AppIE's (optional) 2751 */ 2752 m = ieee80211_getmgtframe(&frm, 2753 ic->ic_headroom + sizeof(struct ieee80211_frame), 2754 sizeof(uint16_t) 2755 + sizeof(uint16_t) 2756 + sizeof(uint16_t) 2757 + 2 + IEEE80211_RATE_SIZE 2758 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2759 + sizeof(struct ieee80211_ie_htcap) + 4 2760 + sizeof(struct ieee80211_ie_htinfo) + 4 2761 + sizeof(struct ieee80211_ie_vhtcap) 2762 + sizeof(struct ieee80211_ie_vht_operation) 2763 + sizeof(struct ieee80211_wme_param) 2764 #ifdef IEEE80211_SUPPORT_SUPERG 2765 + sizeof(struct ieee80211_ath_ie) 2766 #endif 2767 + (vap->iv_appie_assocresp != NULL ? 2768 vap->iv_appie_assocresp->ie_len : 0) 2769 ); 2770 if (m == NULL) 2771 senderr(ENOMEM, is_tx_nobuf); 2772 2773 capinfo = ieee80211_getcapinfo(vap, bss->ni_chan); 2774 *(uint16_t *)frm = htole16(capinfo); 2775 frm += 2; 2776 2777 *(uint16_t *)frm = htole16(arg); /* status */ 2778 frm += 2; 2779 2780 if (arg == IEEE80211_STATUS_SUCCESS) { 2781 *(uint16_t *)frm = htole16(ni->ni_associd); 2782 IEEE80211_NODE_STAT(ni, tx_assoc); 2783 } else 2784 IEEE80211_NODE_STAT(ni, tx_assoc_fail); 2785 frm += 2; 2786 2787 frm = ieee80211_add_rates(frm, &ni->ni_rates); 2788 frm = ieee80211_add_xrates(frm, &ni->ni_rates); 2789 /* NB: respond according to what we received */ 2790 if ((ni->ni_flags & HTFLAGS) == IEEE80211_NODE_HT) { 2791 frm = ieee80211_add_htcap(frm, ni); 2792 frm = ieee80211_add_htinfo(frm, ni); 2793 } 2794 if ((vap->iv_flags & IEEE80211_F_WME) && 2795 ni->ni_ies.wme_ie != NULL) 2796 frm = ieee80211_add_wme_param(frm, &ic->ic_wme); 2797 if ((ni->ni_flags & HTFLAGS) == HTFLAGS) { 2798 frm = ieee80211_add_htcap_vendor(frm, ni); 2799 frm = ieee80211_add_htinfo_vendor(frm, ni); 2800 } 2801 if (ni->ni_flags & IEEE80211_NODE_VHT) { 2802 frm = ieee80211_add_vhtcap(frm, ni); 2803 frm = ieee80211_add_vhtinfo(frm, ni); 2804 } 2805 #ifdef IEEE80211_SUPPORT_SUPERG 2806 if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS)) 2807 frm = ieee80211_add_ath(frm, 2808 IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS), 2809 ((vap->iv_flags & IEEE80211_F_WPA) == 0 && 2810 ni->ni_authmode != IEEE80211_AUTH_8021X) ? 2811 vap->iv_def_txkey : IEEE80211_KEYIX_NONE); 2812 #endif /* IEEE80211_SUPPORT_SUPERG */ 2813 if (vap->iv_appie_assocresp != NULL) 2814 frm = add_appie(frm, vap->iv_appie_assocresp); 2815 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2816 break; 2817 2818 case IEEE80211_FC0_SUBTYPE_DISASSOC: 2819 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 2820 "send station disassociate (reason: %d (%s))", arg, 2821 ieee80211_reason_to_string(arg)); 2822 m = ieee80211_getmgtframe(&frm, 2823 ic->ic_headroom + sizeof(struct ieee80211_frame), 2824 sizeof(uint16_t)); 2825 if (m == NULL) 2826 senderr(ENOMEM, is_tx_nobuf); 2827 *(uint16_t *)frm = htole16(arg); /* reason */ 2828 m->m_pkthdr.len = m->m_len = sizeof(uint16_t); 2829 2830 IEEE80211_NODE_STAT(ni, tx_disassoc); 2831 IEEE80211_NODE_STAT_SET(ni, tx_disassoc_code, arg); 2832 break; 2833 2834 default: 2835 IEEE80211_NOTE(vap, IEEE80211_MSG_ANY, ni, 2836 "invalid mgmt frame type %u", type); 2837 senderr(EINVAL, is_tx_unknownmgt); 2838 /* NOTREACHED */ 2839 } 2840 2841 /* NB: force non-ProbeResp frames to the highest queue */ 2842 params.ibp_pri = WME_AC_VO; 2843 params.ibp_rate0 = bss->ni_txparms->mgmtrate; 2844 /* NB: we know all frames are unicast */ 2845 params.ibp_try0 = bss->ni_txparms->maxretry; 2846 params.ibp_power = bss->ni_txpower; 2847 return ieee80211_mgmt_output(ni, m, type, ¶ms); 2848 bad: 2849 ieee80211_free_node(ni); 2850 return ret; 2851 #undef senderr 2852 #undef HTFLAGS 2853 } 2854 2855 /* 2856 * Return an mbuf with a probe response frame in it. 2857 * Space is left to prepend and 802.11 header at the 2858 * front but it's left to the caller to fill in. 2859 */ 2860 struct mbuf * 2861 ieee80211_alloc_proberesp(struct ieee80211_node *bss, int legacy) 2862 { 2863 struct ieee80211vap *vap = bss->ni_vap; 2864 struct ieee80211com *ic = bss->ni_ic; 2865 const struct ieee80211_rateset *rs; 2866 struct mbuf *m; 2867 uint16_t capinfo; 2868 uint8_t *frm; 2869 2870 /* 2871 * probe response frame format 2872 * [8] time stamp 2873 * [2] beacon interval 2874 * [2] cabability information 2875 * [tlv] ssid 2876 * [tlv] supported rates 2877 * [tlv] parameter set (FH/DS) 2878 * [tlv] parameter set (IBSS) 2879 * [tlv] country (optional) 2880 * [3] power control (optional) 2881 * [5] channel switch announcement (CSA) (optional) 2882 * [tlv] extended rate phy (ERP) 2883 * [tlv] extended supported rates 2884 * [tlv] RSN (optional) 2885 * [tlv] HT capabilities 2886 * [tlv] HT information 2887 * [tlv] VHT capabilities 2888 * [tlv] VHT information 2889 * [tlv] WPA (optional) 2890 * [tlv] WME (optional) 2891 * [tlv] Vendor OUI HT capabilities (optional) 2892 * [tlv] Vendor OUI HT information (optional) 2893 * [tlv] Atheros capabilities 2894 * [tlv] AppIE's (optional) 2895 * [tlv] Mesh ID (MBSS) 2896 * [tlv] Mesh Conf (MBSS) 2897 */ 2898 m = ieee80211_getmgtframe(&frm, 2899 ic->ic_headroom + sizeof(struct ieee80211_frame), 2900 8 2901 + sizeof(uint16_t) 2902 + sizeof(uint16_t) 2903 + 2 + IEEE80211_NWID_LEN 2904 + 2 + IEEE80211_RATE_SIZE 2905 + 7 /* max(7,3) */ 2906 + IEEE80211_COUNTRY_MAX_SIZE 2907 + 3 2908 + sizeof(struct ieee80211_csa_ie) 2909 + sizeof(struct ieee80211_quiet_ie) 2910 + 3 2911 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2912 + sizeof(struct ieee80211_ie_wpa) 2913 + sizeof(struct ieee80211_ie_htcap) 2914 + sizeof(struct ieee80211_ie_htinfo) 2915 + sizeof(struct ieee80211_ie_wpa) 2916 + sizeof(struct ieee80211_wme_param) 2917 + 4 + sizeof(struct ieee80211_ie_htcap) 2918 + 4 + sizeof(struct ieee80211_ie_htinfo) 2919 + sizeof(struct ieee80211_ie_vhtcap) 2920 + sizeof(struct ieee80211_ie_vht_operation) 2921 #ifdef IEEE80211_SUPPORT_SUPERG 2922 + sizeof(struct ieee80211_ath_ie) 2923 #endif 2924 #ifdef IEEE80211_SUPPORT_MESH 2925 + 2 + IEEE80211_MESHID_LEN 2926 + sizeof(struct ieee80211_meshconf_ie) 2927 #endif 2928 + (vap->iv_appie_proberesp != NULL ? 2929 vap->iv_appie_proberesp->ie_len : 0) 2930 ); 2931 if (m == NULL) { 2932 vap->iv_stats.is_tx_nobuf++; 2933 return NULL; 2934 } 2935 2936 memset(frm, 0, 8); /* timestamp should be filled later */ 2937 frm += 8; 2938 *(uint16_t *)frm = htole16(bss->ni_intval); 2939 frm += 2; 2940 capinfo = ieee80211_getcapinfo(vap, bss->ni_chan); 2941 *(uint16_t *)frm = htole16(capinfo); 2942 frm += 2; 2943 2944 frm = ieee80211_add_ssid(frm, bss->ni_essid, bss->ni_esslen); 2945 rs = ieee80211_get_suprates(ic, bss->ni_chan); 2946 frm = ieee80211_add_rates(frm, rs); 2947 2948 if (IEEE80211_IS_CHAN_FHSS(bss->ni_chan)) { 2949 *frm++ = IEEE80211_ELEMID_FHPARMS; 2950 *frm++ = 5; 2951 *frm++ = bss->ni_fhdwell & 0x00ff; 2952 *frm++ = (bss->ni_fhdwell >> 8) & 0x00ff; 2953 *frm++ = IEEE80211_FH_CHANSET( 2954 ieee80211_chan2ieee(ic, bss->ni_chan)); 2955 *frm++ = IEEE80211_FH_CHANPAT( 2956 ieee80211_chan2ieee(ic, bss->ni_chan)); 2957 *frm++ = bss->ni_fhindex; 2958 } else { 2959 *frm++ = IEEE80211_ELEMID_DSPARMS; 2960 *frm++ = 1; 2961 *frm++ = ieee80211_chan2ieee(ic, bss->ni_chan); 2962 } 2963 2964 if (vap->iv_opmode == IEEE80211_M_IBSS) { 2965 *frm++ = IEEE80211_ELEMID_IBSSPARMS; 2966 *frm++ = 2; 2967 *frm++ = 0; *frm++ = 0; /* TODO: ATIM window */ 2968 } 2969 if ((vap->iv_flags & IEEE80211_F_DOTH) || 2970 (vap->iv_flags_ext & IEEE80211_FEXT_DOTD)) 2971 frm = ieee80211_add_countryie(frm, ic); 2972 if (vap->iv_flags & IEEE80211_F_DOTH) { 2973 if (IEEE80211_IS_CHAN_5GHZ(bss->ni_chan)) 2974 frm = ieee80211_add_powerconstraint(frm, vap); 2975 if (ic->ic_flags & IEEE80211_F_CSAPENDING) 2976 frm = ieee80211_add_csa(frm, vap); 2977 } 2978 if (vap->iv_flags & IEEE80211_F_DOTH) { 2979 if (IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) && 2980 (vap->iv_flags_ext & IEEE80211_FEXT_DFS)) { 2981 if (vap->iv_quiet) 2982 frm = ieee80211_add_quiet(frm, vap, 0); 2983 } 2984 } 2985 if (IEEE80211_IS_CHAN_ANYG(bss->ni_chan)) 2986 frm = ieee80211_add_erp(frm, ic); 2987 frm = ieee80211_add_xrates(frm, rs); 2988 frm = ieee80211_add_rsn(frm, vap); 2989 /* 2990 * NB: legacy 11b clients do not get certain ie's. 2991 * The caller identifies such clients by passing 2992 * a token in legacy to us. Could expand this to be 2993 * any legacy client for stuff like HT ie's. 2994 */ 2995 if (IEEE80211_IS_CHAN_HT(bss->ni_chan) && 2996 legacy != IEEE80211_SEND_LEGACY_11B) { 2997 frm = ieee80211_add_htcap(frm, bss); 2998 frm = ieee80211_add_htinfo(frm, bss); 2999 } 3000 if (IEEE80211_IS_CHAN_VHT(bss->ni_chan) && 3001 legacy != IEEE80211_SEND_LEGACY_11B) { 3002 frm = ieee80211_add_vhtcap(frm, bss); 3003 frm = ieee80211_add_vhtinfo(frm, bss); 3004 } 3005 frm = ieee80211_add_wpa(frm, vap); 3006 if (vap->iv_flags & IEEE80211_F_WME) 3007 frm = ieee80211_add_wme_param(frm, &ic->ic_wme); 3008 if (IEEE80211_IS_CHAN_HT(bss->ni_chan) && 3009 (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) && 3010 legacy != IEEE80211_SEND_LEGACY_11B) { 3011 frm = ieee80211_add_htcap_vendor(frm, bss); 3012 frm = ieee80211_add_htinfo_vendor(frm, bss); 3013 } 3014 #ifdef IEEE80211_SUPPORT_SUPERG 3015 if ((vap->iv_flags & IEEE80211_F_ATHEROS) && 3016 legacy != IEEE80211_SEND_LEGACY_11B) 3017 frm = ieee80211_add_athcaps(frm, bss); 3018 #endif 3019 if (vap->iv_appie_proberesp != NULL) 3020 frm = add_appie(frm, vap->iv_appie_proberesp); 3021 #ifdef IEEE80211_SUPPORT_MESH 3022 if (vap->iv_opmode == IEEE80211_M_MBSS) { 3023 frm = ieee80211_add_meshid(frm, vap); 3024 frm = ieee80211_add_meshconf(frm, vap); 3025 } 3026 #endif 3027 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 3028 3029 return m; 3030 } 3031 3032 /* 3033 * Send a probe response frame to the specified mac address. 3034 * This does not go through the normal mgt frame api so we 3035 * can specify the destination address and re-use the bss node 3036 * for the sta reference. 3037 */ 3038 int 3039 ieee80211_send_proberesp(struct ieee80211vap *vap, 3040 const uint8_t da[IEEE80211_ADDR_LEN], int legacy) 3041 { 3042 struct ieee80211_node *bss = vap->iv_bss; 3043 struct ieee80211com *ic = vap->iv_ic; 3044 struct mbuf *m; 3045 int ret; 3046 3047 if (vap->iv_state == IEEE80211_S_CAC) { 3048 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, bss, 3049 "block %s frame in CAC state", "probe response"); 3050 vap->iv_stats.is_tx_badstate++; 3051 return EIO; /* XXX */ 3052 } 3053 3054 /* 3055 * Hold a reference on the node so it doesn't go away until after 3056 * the xmit is complete all the way in the driver. On error we 3057 * will remove our reference. 3058 */ 3059 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 3060 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", 3061 __func__, __LINE__, bss, ether_sprintf(bss->ni_macaddr), 3062 ieee80211_node_refcnt(bss)+1); 3063 ieee80211_ref_node(bss); 3064 3065 m = ieee80211_alloc_proberesp(bss, legacy); 3066 if (m == NULL) { 3067 ieee80211_free_node(bss); 3068 return ENOMEM; 3069 } 3070 3071 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); 3072 KASSERT(m != NULL, ("no room for header")); 3073 3074 IEEE80211_TX_LOCK(ic); 3075 ieee80211_send_setup(bss, m, 3076 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_RESP, 3077 IEEE80211_NONQOS_TID, vap->iv_myaddr, da, bss->ni_bssid); 3078 /* XXX power management? */ 3079 m->m_flags |= M_ENCAP; /* mark encapsulated */ 3080 3081 M_WME_SETAC(m, WME_AC_BE); 3082 3083 IEEE80211_DPRINTF(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS, 3084 "send probe resp on channel %u to %s%s\n", 3085 ieee80211_chan2ieee(ic, ic->ic_curchan), ether_sprintf(da), 3086 legacy ? " <legacy>" : ""); 3087 IEEE80211_NODE_STAT(bss, tx_mgmt); 3088 3089 ret = ieee80211_raw_output(vap, bss, m, NULL); 3090 IEEE80211_TX_UNLOCK(ic); 3091 return (ret); 3092 } 3093 3094 /* 3095 * Allocate and build a RTS (Request To Send) control frame. 3096 */ 3097 struct mbuf * 3098 ieee80211_alloc_rts(struct ieee80211com *ic, 3099 const uint8_t ra[IEEE80211_ADDR_LEN], 3100 const uint8_t ta[IEEE80211_ADDR_LEN], 3101 uint16_t dur) 3102 { 3103 struct ieee80211_frame_rts *rts; 3104 struct mbuf *m; 3105 3106 /* XXX honor ic_headroom */ 3107 m = m_gethdr(M_NOWAIT, MT_DATA); 3108 if (m != NULL) { 3109 rts = mtod(m, struct ieee80211_frame_rts *); 3110 rts->i_fc[0] = IEEE80211_FC0_VERSION_0 | 3111 IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_RTS; 3112 rts->i_fc[1] = IEEE80211_FC1_DIR_NODS; 3113 *(u_int16_t *)rts->i_dur = htole16(dur); 3114 IEEE80211_ADDR_COPY(rts->i_ra, ra); 3115 IEEE80211_ADDR_COPY(rts->i_ta, ta); 3116 3117 m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_rts); 3118 } 3119 return m; 3120 } 3121 3122 /* 3123 * Allocate and build a CTS (Clear To Send) control frame. 3124 */ 3125 struct mbuf * 3126 ieee80211_alloc_cts(struct ieee80211com *ic, 3127 const uint8_t ra[IEEE80211_ADDR_LEN], uint16_t dur) 3128 { 3129 struct ieee80211_frame_cts *cts; 3130 struct mbuf *m; 3131 3132 /* XXX honor ic_headroom */ 3133 m = m_gethdr(M_NOWAIT, MT_DATA); 3134 if (m != NULL) { 3135 cts = mtod(m, struct ieee80211_frame_cts *); 3136 cts->i_fc[0] = IEEE80211_FC0_VERSION_0 | 3137 IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_CTS; 3138 cts->i_fc[1] = IEEE80211_FC1_DIR_NODS; 3139 *(u_int16_t *)cts->i_dur = htole16(dur); 3140 IEEE80211_ADDR_COPY(cts->i_ra, ra); 3141 3142 m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_cts); 3143 } 3144 return m; 3145 } 3146 3147 /* 3148 * Wrapper for CTS/RTS frame allocation. 3149 */ 3150 struct mbuf * 3151 ieee80211_alloc_prot(struct ieee80211_node *ni, const struct mbuf *m, 3152 uint8_t rate, int prot) 3153 { 3154 struct ieee80211com *ic = ni->ni_ic; 3155 const struct ieee80211_frame *wh; 3156 struct mbuf *mprot; 3157 uint16_t dur; 3158 int pktlen, isshort; 3159 3160 KASSERT(prot == IEEE80211_PROT_RTSCTS || 3161 prot == IEEE80211_PROT_CTSONLY, 3162 ("wrong protection type %d", prot)); 3163 3164 wh = mtod(m, const struct ieee80211_frame *); 3165 pktlen = m->m_pkthdr.len + IEEE80211_CRC_LEN; 3166 isshort = (ic->ic_flags & IEEE80211_F_SHPREAMBLE) != 0; 3167 dur = ieee80211_compute_duration(ic->ic_rt, pktlen, rate, isshort) 3168 + ieee80211_ack_duration(ic->ic_rt, rate, isshort); 3169 3170 if (prot == IEEE80211_PROT_RTSCTS) { 3171 /* NB: CTS is the same size as an ACK */ 3172 dur += ieee80211_ack_duration(ic->ic_rt, rate, isshort); 3173 mprot = ieee80211_alloc_rts(ic, wh->i_addr1, wh->i_addr2, dur); 3174 } else 3175 mprot = ieee80211_alloc_cts(ic, ni->ni_vap->iv_myaddr, dur); 3176 3177 return (mprot); 3178 } 3179 3180 static void 3181 ieee80211_tx_mgt_timeout(void *arg) 3182 { 3183 struct ieee80211vap *vap = arg; 3184 3185 IEEE80211_LOCK(vap->iv_ic); 3186 if (vap->iv_state != IEEE80211_S_INIT && 3187 (vap->iv_ic->ic_flags & IEEE80211_F_SCAN) == 0) { 3188 /* 3189 * NB: it's safe to specify a timeout as the reason here; 3190 * it'll only be used in the right state. 3191 */ 3192 ieee80211_new_state_locked(vap, IEEE80211_S_SCAN, 3193 IEEE80211_SCAN_FAIL_TIMEOUT); 3194 } 3195 IEEE80211_UNLOCK(vap->iv_ic); 3196 } 3197 3198 /* 3199 * This is the callback set on net80211-sourced transmitted 3200 * authentication request frames. 3201 * 3202 * This does a couple of things: 3203 * 3204 * + If the frame transmitted was a success, it schedules a future 3205 * event which will transition the interface to scan. 3206 * If a state transition _then_ occurs before that event occurs, 3207 * said state transition will cancel this callout. 3208 * 3209 * + If the frame transmit was a failure, it immediately schedules 3210 * the transition back to scan. 3211 */ 3212 static void 3213 ieee80211_tx_mgt_cb(struct ieee80211_node *ni, void *arg, int status) 3214 { 3215 struct ieee80211vap *vap = ni->ni_vap; 3216 enum ieee80211_state ostate = (enum ieee80211_state) arg; 3217 3218 /* 3219 * Frame transmit completed; arrange timer callback. If 3220 * transmit was successfully we wait for response. Otherwise 3221 * we arrange an immediate callback instead of doing the 3222 * callback directly since we don't know what state the driver 3223 * is in (e.g. what locks it is holding). This work should 3224 * not be too time-critical and not happen too often so the 3225 * added overhead is acceptable. 3226 * 3227 * XXX what happens if !acked but response shows up before callback? 3228 */ 3229 if (vap->iv_state == ostate) { 3230 callout_reset(&vap->iv_mgtsend, 3231 status == 0 ? IEEE80211_TRANS_WAIT*hz : 0, 3232 ieee80211_tx_mgt_timeout, vap); 3233 } 3234 } 3235 3236 static void 3237 ieee80211_beacon_construct(struct mbuf *m, uint8_t *frm, 3238 struct ieee80211_node *ni) 3239 { 3240 struct ieee80211vap *vap = ni->ni_vap; 3241 struct ieee80211_beacon_offsets *bo = &vap->iv_bcn_off; 3242 struct ieee80211com *ic = ni->ni_ic; 3243 struct ieee80211_rateset *rs = &ni->ni_rates; 3244 uint16_t capinfo; 3245 3246 /* 3247 * beacon frame format 3248 * 3249 * TODO: update to 802.11-2012; a lot of stuff has changed; 3250 * vendor extensions should be at the end, etc. 3251 * 3252 * [8] time stamp 3253 * [2] beacon interval 3254 * [2] cabability information 3255 * [tlv] ssid 3256 * [tlv] supported rates 3257 * [3] parameter set (DS) 3258 * [8] CF parameter set (optional) 3259 * [tlv] parameter set (IBSS/TIM) 3260 * [tlv] country (optional) 3261 * [3] power control (optional) 3262 * [5] channel switch announcement (CSA) (optional) 3263 * XXX TODO: Quiet 3264 * XXX TODO: IBSS DFS 3265 * XXX TODO: TPC report 3266 * [tlv] extended rate phy (ERP) 3267 * [tlv] extended supported rates 3268 * [tlv] RSN parameters 3269 * XXX TODO: BSSLOAD 3270 * (XXX EDCA parameter set, QoS capability?) 3271 * XXX TODO: AP channel report 3272 * 3273 * [tlv] HT capabilities 3274 * [tlv] HT information 3275 * XXX TODO: 20/40 BSS coexistence 3276 * Mesh: 3277 * XXX TODO: Meshid 3278 * XXX TODO: mesh config 3279 * XXX TODO: mesh awake window 3280 * XXX TODO: beacon timing (mesh, etc) 3281 * XXX TODO: MCCAOP Advertisement Overview 3282 * XXX TODO: MCCAOP Advertisement 3283 * XXX TODO: Mesh channel switch parameters 3284 * VHT: 3285 * XXX TODO: VHT capabilities 3286 * XXX TODO: VHT operation 3287 * XXX TODO: VHT transmit power envelope 3288 * XXX TODO: channel switch wrapper element 3289 * XXX TODO: extended BSS load element 3290 * 3291 * XXX Vendor-specific OIDs (e.g. Atheros) 3292 * [tlv] WPA parameters 3293 * [tlv] WME parameters 3294 * [tlv] Vendor OUI HT capabilities (optional) 3295 * [tlv] Vendor OUI HT information (optional) 3296 * [tlv] Atheros capabilities (optional) 3297 * [tlv] TDMA parameters (optional) 3298 * [tlv] Mesh ID (MBSS) 3299 * [tlv] Mesh Conf (MBSS) 3300 * [tlv] application data (optional) 3301 */ 3302 3303 memset(bo, 0, sizeof(*bo)); 3304 3305 memset(frm, 0, 8); /* XXX timestamp is set by hardware/driver */ 3306 frm += 8; 3307 *(uint16_t *)frm = htole16(ni->ni_intval); 3308 frm += 2; 3309 capinfo = ieee80211_getcapinfo(vap, ni->ni_chan); 3310 bo->bo_caps = (uint16_t *)frm; 3311 *(uint16_t *)frm = htole16(capinfo); 3312 frm += 2; 3313 *frm++ = IEEE80211_ELEMID_SSID; 3314 if ((vap->iv_flags & IEEE80211_F_HIDESSID) == 0) { 3315 *frm++ = ni->ni_esslen; 3316 memcpy(frm, ni->ni_essid, ni->ni_esslen); 3317 frm += ni->ni_esslen; 3318 } else 3319 *frm++ = 0; 3320 frm = ieee80211_add_rates(frm, rs); 3321 if (!IEEE80211_IS_CHAN_FHSS(ni->ni_chan)) { 3322 *frm++ = IEEE80211_ELEMID_DSPARMS; 3323 *frm++ = 1; 3324 *frm++ = ieee80211_chan2ieee(ic, ni->ni_chan); 3325 } 3326 if (ic->ic_flags & IEEE80211_F_PCF) { 3327 bo->bo_cfp = frm; 3328 frm = ieee80211_add_cfparms(frm, ic); 3329 } 3330 bo->bo_tim = frm; 3331 if (vap->iv_opmode == IEEE80211_M_IBSS) { 3332 *frm++ = IEEE80211_ELEMID_IBSSPARMS; 3333 *frm++ = 2; 3334 *frm++ = 0; *frm++ = 0; /* TODO: ATIM window */ 3335 bo->bo_tim_len = 0; 3336 } else if (vap->iv_opmode == IEEE80211_M_HOSTAP || 3337 vap->iv_opmode == IEEE80211_M_MBSS) { 3338 /* TIM IE is the same for Mesh and Hostap */ 3339 struct ieee80211_tim_ie *tie = (struct ieee80211_tim_ie *) frm; 3340 3341 tie->tim_ie = IEEE80211_ELEMID_TIM; 3342 tie->tim_len = 4; /* length */ 3343 tie->tim_count = 0; /* DTIM count */ 3344 tie->tim_period = vap->iv_dtim_period; /* DTIM period */ 3345 tie->tim_bitctl = 0; /* bitmap control */ 3346 tie->tim_bitmap[0] = 0; /* Partial Virtual Bitmap */ 3347 frm += sizeof(struct ieee80211_tim_ie); 3348 bo->bo_tim_len = 1; 3349 } 3350 bo->bo_tim_trailer = frm; 3351 if ((vap->iv_flags & IEEE80211_F_DOTH) || 3352 (vap->iv_flags_ext & IEEE80211_FEXT_DOTD)) 3353 frm = ieee80211_add_countryie(frm, ic); 3354 if (vap->iv_flags & IEEE80211_F_DOTH) { 3355 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 3356 frm = ieee80211_add_powerconstraint(frm, vap); 3357 bo->bo_csa = frm; 3358 if (ic->ic_flags & IEEE80211_F_CSAPENDING) 3359 frm = ieee80211_add_csa(frm, vap); 3360 } else 3361 bo->bo_csa = frm; 3362 3363 bo->bo_quiet = NULL; 3364 if (vap->iv_flags & IEEE80211_F_DOTH) { 3365 if (IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) && 3366 (vap->iv_flags_ext & IEEE80211_FEXT_DFS) && 3367 (vap->iv_quiet == 1)) { 3368 /* 3369 * We only insert the quiet IE offset if 3370 * the quiet IE is enabled. Otherwise don't 3371 * put it here or we'll just overwrite 3372 * some other beacon contents. 3373 */ 3374 if (vap->iv_quiet) { 3375 bo->bo_quiet = frm; 3376 frm = ieee80211_add_quiet(frm,vap, 0); 3377 } 3378 } 3379 } 3380 3381 if (IEEE80211_IS_CHAN_ANYG(ni->ni_chan)) { 3382 bo->bo_erp = frm; 3383 frm = ieee80211_add_erp(frm, ic); 3384 } 3385 frm = ieee80211_add_xrates(frm, rs); 3386 frm = ieee80211_add_rsn(frm, vap); 3387 if (IEEE80211_IS_CHAN_HT(ni->ni_chan)) { 3388 frm = ieee80211_add_htcap(frm, ni); 3389 bo->bo_htinfo = frm; 3390 frm = ieee80211_add_htinfo(frm, ni); 3391 } 3392 3393 if (IEEE80211_IS_CHAN_VHT(ni->ni_chan)) { 3394 frm = ieee80211_add_vhtcap(frm, ni); 3395 bo->bo_vhtinfo = frm; 3396 frm = ieee80211_add_vhtinfo(frm, ni); 3397 /* Transmit power envelope */ 3398 /* Channel switch wrapper element */ 3399 /* Extended bss load element */ 3400 } 3401 3402 frm = ieee80211_add_wpa(frm, vap); 3403 if (vap->iv_flags & IEEE80211_F_WME) { 3404 bo->bo_wme = frm; 3405 frm = ieee80211_add_wme_param(frm, &ic->ic_wme); 3406 } 3407 if (IEEE80211_IS_CHAN_HT(ni->ni_chan) && 3408 (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT)) { 3409 frm = ieee80211_add_htcap_vendor(frm, ni); 3410 frm = ieee80211_add_htinfo_vendor(frm, ni); 3411 } 3412 3413 #ifdef IEEE80211_SUPPORT_SUPERG 3414 if (vap->iv_flags & IEEE80211_F_ATHEROS) { 3415 bo->bo_ath = frm; 3416 frm = ieee80211_add_athcaps(frm, ni); 3417 } 3418 #endif 3419 #ifdef IEEE80211_SUPPORT_TDMA 3420 if (vap->iv_caps & IEEE80211_C_TDMA) { 3421 bo->bo_tdma = frm; 3422 frm = ieee80211_add_tdma(frm, vap); 3423 } 3424 #endif 3425 if (vap->iv_appie_beacon != NULL) { 3426 bo->bo_appie = frm; 3427 bo->bo_appie_len = vap->iv_appie_beacon->ie_len; 3428 frm = add_appie(frm, vap->iv_appie_beacon); 3429 } 3430 3431 /* XXX TODO: move meshid/meshconf up to before vendor extensions? */ 3432 #ifdef IEEE80211_SUPPORT_MESH 3433 if (vap->iv_opmode == IEEE80211_M_MBSS) { 3434 frm = ieee80211_add_meshid(frm, vap); 3435 bo->bo_meshconf = frm; 3436 frm = ieee80211_add_meshconf(frm, vap); 3437 } 3438 #endif 3439 bo->bo_tim_trailer_len = frm - bo->bo_tim_trailer; 3440 bo->bo_csa_trailer_len = frm - bo->bo_csa; 3441 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 3442 } 3443 3444 /* 3445 * Allocate a beacon frame and fillin the appropriate bits. 3446 */ 3447 struct mbuf * 3448 ieee80211_beacon_alloc(struct ieee80211_node *ni) 3449 { 3450 struct ieee80211vap *vap = ni->ni_vap; 3451 struct ieee80211com *ic = ni->ni_ic; 3452 struct ifnet *ifp = vap->iv_ifp; 3453 struct ieee80211_frame *wh; 3454 struct mbuf *m; 3455 int pktlen; 3456 uint8_t *frm; 3457 3458 /* 3459 * Update the "We're putting the quiet IE in the beacon" state. 3460 */ 3461 if (vap->iv_quiet == 1) 3462 vap->iv_flags_ext |= IEEE80211_FEXT_QUIET_IE; 3463 else if (vap->iv_quiet == 0) 3464 vap->iv_flags_ext &= ~IEEE80211_FEXT_QUIET_IE; 3465 3466 /* 3467 * beacon frame format 3468 * 3469 * Note: This needs updating for 802.11-2012. 3470 * 3471 * [8] time stamp 3472 * [2] beacon interval 3473 * [2] cabability information 3474 * [tlv] ssid 3475 * [tlv] supported rates 3476 * [3] parameter set (DS) 3477 * [8] CF parameter set (optional) 3478 * [tlv] parameter set (IBSS/TIM) 3479 * [tlv] country (optional) 3480 * [3] power control (optional) 3481 * [5] channel switch announcement (CSA) (optional) 3482 * [tlv] extended rate phy (ERP) 3483 * [tlv] extended supported rates 3484 * [tlv] RSN parameters 3485 * [tlv] HT capabilities 3486 * [tlv] HT information 3487 * [tlv] VHT capabilities 3488 * [tlv] VHT operation 3489 * [tlv] Vendor OUI HT capabilities (optional) 3490 * [tlv] Vendor OUI HT information (optional) 3491 * XXX Vendor-specific OIDs (e.g. Atheros) 3492 * [tlv] WPA parameters 3493 * [tlv] WME parameters 3494 * [tlv] TDMA parameters (optional) 3495 * [tlv] Mesh ID (MBSS) 3496 * [tlv] Mesh Conf (MBSS) 3497 * [tlv] application data (optional) 3498 * NB: we allocate the max space required for the TIM bitmap. 3499 * XXX how big is this? 3500 */ 3501 pktlen = 8 /* time stamp */ 3502 + sizeof(uint16_t) /* beacon interval */ 3503 + sizeof(uint16_t) /* capabilities */ 3504 + 2 + ni->ni_esslen /* ssid */ 3505 + 2 + IEEE80211_RATE_SIZE /* supported rates */ 3506 + 2 + 1 /* DS parameters */ 3507 + 2 + 6 /* CF parameters */ 3508 + 2 + 4 + vap->iv_tim_len /* DTIM/IBSSPARMS */ 3509 + IEEE80211_COUNTRY_MAX_SIZE /* country */ 3510 + 2 + 1 /* power control */ 3511 + sizeof(struct ieee80211_csa_ie) /* CSA */ 3512 + sizeof(struct ieee80211_quiet_ie) /* Quiet */ 3513 + 2 + 1 /* ERP */ 3514 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 3515 + (vap->iv_caps & IEEE80211_C_WPA ? /* WPA 1+2 */ 3516 2*sizeof(struct ieee80211_ie_wpa) : 0) 3517 /* XXX conditional? */ 3518 + 4+2*sizeof(struct ieee80211_ie_htcap)/* HT caps */ 3519 + 4+2*sizeof(struct ieee80211_ie_htinfo)/* HT info */ 3520 + sizeof(struct ieee80211_ie_vhtcap)/* VHT caps */ 3521 + sizeof(struct ieee80211_ie_vht_operation)/* VHT info */ 3522 + (vap->iv_caps & IEEE80211_C_WME ? /* WME */ 3523 sizeof(struct ieee80211_wme_param) : 0) 3524 #ifdef IEEE80211_SUPPORT_SUPERG 3525 + sizeof(struct ieee80211_ath_ie) /* ATH */ 3526 #endif 3527 #ifdef IEEE80211_SUPPORT_TDMA 3528 + (vap->iv_caps & IEEE80211_C_TDMA ? /* TDMA */ 3529 sizeof(struct ieee80211_tdma_param) : 0) 3530 #endif 3531 #ifdef IEEE80211_SUPPORT_MESH 3532 + 2 + ni->ni_meshidlen 3533 + sizeof(struct ieee80211_meshconf_ie) 3534 #endif 3535 + IEEE80211_MAX_APPIE 3536 ; 3537 m = ieee80211_getmgtframe(&frm, 3538 ic->ic_headroom + sizeof(struct ieee80211_frame), pktlen); 3539 if (m == NULL) { 3540 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY, 3541 "%s: cannot get buf; size %u\n", __func__, pktlen); 3542 vap->iv_stats.is_tx_nobuf++; 3543 return NULL; 3544 } 3545 ieee80211_beacon_construct(m, frm, ni); 3546 3547 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); 3548 KASSERT(m != NULL, ("no space for 802.11 header?")); 3549 wh = mtod(m, struct ieee80211_frame *); 3550 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT | 3551 IEEE80211_FC0_SUBTYPE_BEACON; 3552 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 3553 *(uint16_t *)wh->i_dur = 0; 3554 IEEE80211_ADDR_COPY(wh->i_addr1, ifp->if_broadcastaddr); 3555 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); 3556 IEEE80211_ADDR_COPY(wh->i_addr3, ni->ni_bssid); 3557 *(uint16_t *)wh->i_seq = 0; 3558 3559 return m; 3560 } 3561 3562 /* 3563 * Update the dynamic parts of a beacon frame based on the current state. 3564 */ 3565 int 3566 ieee80211_beacon_update(struct ieee80211_node *ni, struct mbuf *m, int mcast) 3567 { 3568 struct ieee80211vap *vap = ni->ni_vap; 3569 struct ieee80211_beacon_offsets *bo = &vap->iv_bcn_off; 3570 struct ieee80211com *ic = ni->ni_ic; 3571 int len_changed = 0; 3572 uint16_t capinfo; 3573 struct ieee80211_frame *wh; 3574 ieee80211_seq seqno; 3575 3576 IEEE80211_LOCK(ic); 3577 /* 3578 * Handle 11h channel change when we've reached the count. 3579 * We must recalculate the beacon frame contents to account 3580 * for the new channel. Note we do this only for the first 3581 * vap that reaches this point; subsequent vaps just update 3582 * their beacon state to reflect the recalculated channel. 3583 */ 3584 if (isset(bo->bo_flags, IEEE80211_BEACON_CSA) && 3585 vap->iv_csa_count == ic->ic_csa_count) { 3586 vap->iv_csa_count = 0; 3587 /* 3588 * Effect channel change before reconstructing the beacon 3589 * frame contents as many places reference ni_chan. 3590 */ 3591 if (ic->ic_csa_newchan != NULL) 3592 ieee80211_csa_completeswitch(ic); 3593 /* 3594 * NB: ieee80211_beacon_construct clears all pending 3595 * updates in bo_flags so we don't need to explicitly 3596 * clear IEEE80211_BEACON_CSA. 3597 */ 3598 ieee80211_beacon_construct(m, 3599 mtod(m, uint8_t*) + sizeof(struct ieee80211_frame), ni); 3600 3601 /* XXX do WME aggressive mode processing? */ 3602 IEEE80211_UNLOCK(ic); 3603 return 1; /* just assume length changed */ 3604 } 3605 3606 /* 3607 * Handle the quiet time element being added and removed. 3608 * Again, for now we just cheat and reconstruct the whole 3609 * beacon - that way the gap is provided as appropriate. 3610 * 3611 * So, track whether we have already added the IE versus 3612 * whether we want to be adding the IE. 3613 */ 3614 if ((vap->iv_flags_ext & IEEE80211_FEXT_QUIET_IE) && 3615 (vap->iv_quiet == 0)) { 3616 /* 3617 * Quiet time beacon IE enabled, but it's disabled; 3618 * recalc 3619 */ 3620 vap->iv_flags_ext &= ~IEEE80211_FEXT_QUIET_IE; 3621 ieee80211_beacon_construct(m, 3622 mtod(m, uint8_t*) + sizeof(struct ieee80211_frame), ni); 3623 /* XXX do WME aggressive mode processing? */ 3624 IEEE80211_UNLOCK(ic); 3625 return 1; /* just assume length changed */ 3626 } 3627 3628 if (((vap->iv_flags_ext & IEEE80211_FEXT_QUIET_IE) == 0) && 3629 (vap->iv_quiet == 1)) { 3630 /* 3631 * Quiet time beacon IE disabled, but it's now enabled; 3632 * recalc 3633 */ 3634 vap->iv_flags_ext |= IEEE80211_FEXT_QUIET_IE; 3635 ieee80211_beacon_construct(m, 3636 mtod(m, uint8_t*) + sizeof(struct ieee80211_frame), ni); 3637 /* XXX do WME aggressive mode processing? */ 3638 IEEE80211_UNLOCK(ic); 3639 return 1; /* just assume length changed */ 3640 } 3641 3642 wh = mtod(m, struct ieee80211_frame *); 3643 3644 /* 3645 * XXX TODO Strictly speaking this should be incremented with the TX 3646 * lock held so as to serialise access to the non-qos TID sequence 3647 * number space. 3648 * 3649 * If the driver identifies it does its own TX seqno management then 3650 * we can skip this (and still not do the TX seqno.) 3651 */ 3652 seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]++; 3653 *(uint16_t *)&wh->i_seq[0] = 3654 htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); 3655 M_SEQNO_SET(m, seqno); 3656 3657 /* XXX faster to recalculate entirely or just changes? */ 3658 capinfo = ieee80211_getcapinfo(vap, ni->ni_chan); 3659 *bo->bo_caps = htole16(capinfo); 3660 3661 if (vap->iv_flags & IEEE80211_F_WME) { 3662 struct ieee80211_wme_state *wme = &ic->ic_wme; 3663 3664 /* 3665 * Check for aggressive mode change. When there is 3666 * significant high priority traffic in the BSS 3667 * throttle back BE traffic by using conservative 3668 * parameters. Otherwise BE uses aggressive params 3669 * to optimize performance of legacy/non-QoS traffic. 3670 */ 3671 if (wme->wme_flags & WME_F_AGGRMODE) { 3672 if (wme->wme_hipri_traffic > 3673 wme->wme_hipri_switch_thresh) { 3674 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 3675 "%s: traffic %u, disable aggressive mode\n", 3676 __func__, wme->wme_hipri_traffic); 3677 wme->wme_flags &= ~WME_F_AGGRMODE; 3678 ieee80211_wme_updateparams_locked(vap); 3679 wme->wme_hipri_traffic = 3680 wme->wme_hipri_switch_hysteresis; 3681 } else 3682 wme->wme_hipri_traffic = 0; 3683 } else { 3684 if (wme->wme_hipri_traffic <= 3685 wme->wme_hipri_switch_thresh) { 3686 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 3687 "%s: traffic %u, enable aggressive mode\n", 3688 __func__, wme->wme_hipri_traffic); 3689 wme->wme_flags |= WME_F_AGGRMODE; 3690 ieee80211_wme_updateparams_locked(vap); 3691 wme->wme_hipri_traffic = 0; 3692 } else 3693 wme->wme_hipri_traffic = 3694 wme->wme_hipri_switch_hysteresis; 3695 } 3696 if (isset(bo->bo_flags, IEEE80211_BEACON_WME)) { 3697 (void) ieee80211_add_wme_param(bo->bo_wme, wme); 3698 clrbit(bo->bo_flags, IEEE80211_BEACON_WME); 3699 } 3700 } 3701 3702 if (isset(bo->bo_flags, IEEE80211_BEACON_HTINFO)) { 3703 ieee80211_ht_update_beacon(vap, bo); 3704 clrbit(bo->bo_flags, IEEE80211_BEACON_HTINFO); 3705 } 3706 #ifdef IEEE80211_SUPPORT_TDMA 3707 if (vap->iv_caps & IEEE80211_C_TDMA) { 3708 /* 3709 * NB: the beacon is potentially updated every TBTT. 3710 */ 3711 ieee80211_tdma_update_beacon(vap, bo); 3712 } 3713 #endif 3714 #ifdef IEEE80211_SUPPORT_MESH 3715 if (vap->iv_opmode == IEEE80211_M_MBSS) 3716 ieee80211_mesh_update_beacon(vap, bo); 3717 #endif 3718 3719 if (vap->iv_opmode == IEEE80211_M_HOSTAP || 3720 vap->iv_opmode == IEEE80211_M_MBSS) { /* NB: no IBSS support*/ 3721 struct ieee80211_tim_ie *tie = 3722 (struct ieee80211_tim_ie *) bo->bo_tim; 3723 if (isset(bo->bo_flags, IEEE80211_BEACON_TIM)) { 3724 u_int timlen, timoff, i; 3725 /* 3726 * ATIM/DTIM needs updating. If it fits in the 3727 * current space allocated then just copy in the 3728 * new bits. Otherwise we need to move any trailing 3729 * data to make room. Note that we know there is 3730 * contiguous space because ieee80211_beacon_allocate 3731 * insures there is space in the mbuf to write a 3732 * maximal-size virtual bitmap (based on iv_max_aid). 3733 */ 3734 /* 3735 * Calculate the bitmap size and offset, copy any 3736 * trailer out of the way, and then copy in the 3737 * new bitmap and update the information element. 3738 * Note that the tim bitmap must contain at least 3739 * one byte and any offset must be even. 3740 */ 3741 if (vap->iv_ps_pending != 0) { 3742 timoff = 128; /* impossibly large */ 3743 for (i = 0; i < vap->iv_tim_len; i++) 3744 if (vap->iv_tim_bitmap[i]) { 3745 timoff = i &~ 1; 3746 break; 3747 } 3748 KASSERT(timoff != 128, ("tim bitmap empty!")); 3749 for (i = vap->iv_tim_len-1; i >= timoff; i--) 3750 if (vap->iv_tim_bitmap[i]) 3751 break; 3752 timlen = 1 + (i - timoff); 3753 } else { 3754 timoff = 0; 3755 timlen = 1; 3756 } 3757 3758 /* 3759 * TODO: validate this! 3760 */ 3761 if (timlen != bo->bo_tim_len) { 3762 /* copy up/down trailer */ 3763 int adjust = tie->tim_bitmap+timlen 3764 - bo->bo_tim_trailer; 3765 ovbcopy(bo->bo_tim_trailer, 3766 bo->bo_tim_trailer+adjust, 3767 bo->bo_tim_trailer_len); 3768 bo->bo_tim_trailer += adjust; 3769 bo->bo_erp += adjust; 3770 bo->bo_htinfo += adjust; 3771 bo->bo_vhtinfo += adjust; 3772 #ifdef IEEE80211_SUPPORT_SUPERG 3773 bo->bo_ath += adjust; 3774 #endif 3775 #ifdef IEEE80211_SUPPORT_TDMA 3776 bo->bo_tdma += adjust; 3777 #endif 3778 #ifdef IEEE80211_SUPPORT_MESH 3779 bo->bo_meshconf += adjust; 3780 #endif 3781 bo->bo_appie += adjust; 3782 bo->bo_wme += adjust; 3783 bo->bo_csa += adjust; 3784 bo->bo_quiet += adjust; 3785 bo->bo_tim_len = timlen; 3786 3787 /* update information element */ 3788 tie->tim_len = 3 + timlen; 3789 tie->tim_bitctl = timoff; 3790 len_changed = 1; 3791 } 3792 memcpy(tie->tim_bitmap, vap->iv_tim_bitmap + timoff, 3793 bo->bo_tim_len); 3794 3795 clrbit(bo->bo_flags, IEEE80211_BEACON_TIM); 3796 3797 IEEE80211_DPRINTF(vap, IEEE80211_MSG_POWER, 3798 "%s: TIM updated, pending %u, off %u, len %u\n", 3799 __func__, vap->iv_ps_pending, timoff, timlen); 3800 } 3801 /* count down DTIM period */ 3802 if (tie->tim_count == 0) 3803 tie->tim_count = tie->tim_period - 1; 3804 else 3805 tie->tim_count--; 3806 /* update state for buffered multicast frames on DTIM */ 3807 if (mcast && tie->tim_count == 0) 3808 tie->tim_bitctl |= 1; 3809 else 3810 tie->tim_bitctl &= ~1; 3811 if (isset(bo->bo_flags, IEEE80211_BEACON_CSA)) { 3812 struct ieee80211_csa_ie *csa = 3813 (struct ieee80211_csa_ie *) bo->bo_csa; 3814 3815 /* 3816 * Insert or update CSA ie. If we're just starting 3817 * to count down to the channel switch then we need 3818 * to insert the CSA ie. Otherwise we just need to 3819 * drop the count. The actual change happens above 3820 * when the vap's count reaches the target count. 3821 */ 3822 if (vap->iv_csa_count == 0) { 3823 memmove(&csa[1], csa, bo->bo_csa_trailer_len); 3824 bo->bo_erp += sizeof(*csa); 3825 bo->bo_htinfo += sizeof(*csa); 3826 bo->bo_vhtinfo += sizeof(*csa); 3827 bo->bo_wme += sizeof(*csa); 3828 #ifdef IEEE80211_SUPPORT_SUPERG 3829 bo->bo_ath += sizeof(*csa); 3830 #endif 3831 #ifdef IEEE80211_SUPPORT_TDMA 3832 bo->bo_tdma += sizeof(*csa); 3833 #endif 3834 #ifdef IEEE80211_SUPPORT_MESH 3835 bo->bo_meshconf += sizeof(*csa); 3836 #endif 3837 bo->bo_appie += sizeof(*csa); 3838 bo->bo_csa_trailer_len += sizeof(*csa); 3839 bo->bo_quiet += sizeof(*csa); 3840 bo->bo_tim_trailer_len += sizeof(*csa); 3841 m->m_len += sizeof(*csa); 3842 m->m_pkthdr.len += sizeof(*csa); 3843 3844 ieee80211_add_csa(bo->bo_csa, vap); 3845 } else 3846 csa->csa_count--; 3847 vap->iv_csa_count++; 3848 /* NB: don't clear IEEE80211_BEACON_CSA */ 3849 } 3850 3851 /* 3852 * Only add the quiet time IE if we've enabled it 3853 * as appropriate. 3854 */ 3855 if (IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) && 3856 (vap->iv_flags_ext & IEEE80211_FEXT_DFS)) { 3857 if (vap->iv_quiet && 3858 (vap->iv_flags_ext & IEEE80211_FEXT_QUIET_IE)) { 3859 ieee80211_add_quiet(bo->bo_quiet, vap, 1); 3860 } 3861 } 3862 if (isset(bo->bo_flags, IEEE80211_BEACON_ERP)) { 3863 /* 3864 * ERP element needs updating. 3865 */ 3866 (void) ieee80211_add_erp(bo->bo_erp, ic); 3867 clrbit(bo->bo_flags, IEEE80211_BEACON_ERP); 3868 } 3869 #ifdef IEEE80211_SUPPORT_SUPERG 3870 if (isset(bo->bo_flags, IEEE80211_BEACON_ATH)) { 3871 ieee80211_add_athcaps(bo->bo_ath, ni); 3872 clrbit(bo->bo_flags, IEEE80211_BEACON_ATH); 3873 } 3874 #endif 3875 } 3876 if (isset(bo->bo_flags, IEEE80211_BEACON_APPIE)) { 3877 const struct ieee80211_appie *aie = vap->iv_appie_beacon; 3878 int aielen; 3879 uint8_t *frm; 3880 3881 aielen = 0; 3882 if (aie != NULL) 3883 aielen += aie->ie_len; 3884 if (aielen != bo->bo_appie_len) { 3885 /* copy up/down trailer */ 3886 int adjust = aielen - bo->bo_appie_len; 3887 ovbcopy(bo->bo_tim_trailer, bo->bo_tim_trailer+adjust, 3888 bo->bo_tim_trailer_len); 3889 bo->bo_tim_trailer += adjust; 3890 bo->bo_appie += adjust; 3891 bo->bo_appie_len = aielen; 3892 3893 len_changed = 1; 3894 } 3895 frm = bo->bo_appie; 3896 if (aie != NULL) 3897 frm = add_appie(frm, aie); 3898 clrbit(bo->bo_flags, IEEE80211_BEACON_APPIE); 3899 } 3900 IEEE80211_UNLOCK(ic); 3901 3902 return len_changed; 3903 } 3904 3905 /* 3906 * Do Ethernet-LLC encapsulation for each payload in a fast frame 3907 * tunnel encapsulation. The frame is assumed to have an Ethernet 3908 * header at the front that must be stripped before prepending the 3909 * LLC followed by the Ethernet header passed in (with an Ethernet 3910 * type that specifies the payload size). 3911 */ 3912 struct mbuf * 3913 ieee80211_ff_encap1(struct ieee80211vap *vap, struct mbuf *m, 3914 const struct ether_header *eh) 3915 { 3916 struct llc *llc; 3917 uint16_t payload; 3918 3919 /* XXX optimize by combining m_adj+M_PREPEND */ 3920 m_adj(m, sizeof(struct ether_header) - sizeof(struct llc)); 3921 llc = mtod(m, struct llc *); 3922 llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP; 3923 llc->llc_control = LLC_UI; 3924 llc->llc_snap.org_code[0] = 0; 3925 llc->llc_snap.org_code[1] = 0; 3926 llc->llc_snap.org_code[2] = 0; 3927 llc->llc_snap.ether_type = eh->ether_type; 3928 payload = m->m_pkthdr.len; /* NB: w/o Ethernet header */ 3929 3930 M_PREPEND(m, sizeof(struct ether_header), M_NOWAIT); 3931 if (m == NULL) { /* XXX cannot happen */ 3932 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG, 3933 "%s: no space for ether_header\n", __func__); 3934 vap->iv_stats.is_tx_nobuf++; 3935 return NULL; 3936 } 3937 ETHER_HEADER_COPY(mtod(m, void *), eh); 3938 mtod(m, struct ether_header *)->ether_type = htons(payload); 3939 return m; 3940 } 3941 3942 /* 3943 * Complete an mbuf transmission. 3944 * 3945 * For now, this simply processes a completed frame after the 3946 * driver has completed it's transmission and/or retransmission. 3947 * It assumes the frame is an 802.11 encapsulated frame. 3948 * 3949 * Later on it will grow to become the exit path for a given frame 3950 * from the driver and, depending upon how it's been encapsulated 3951 * and already transmitted, it may end up doing A-MPDU retransmission, 3952 * power save requeuing, etc. 3953 * 3954 * In order for the above to work, the driver entry point to this 3955 * must not hold any driver locks. Thus, the driver needs to delay 3956 * any actual mbuf completion until it can release said locks. 3957 * 3958 * This frees the mbuf and if the mbuf has a node reference, 3959 * the node reference will be freed. 3960 */ 3961 void 3962 ieee80211_tx_complete(struct ieee80211_node *ni, struct mbuf *m, int status) 3963 { 3964 3965 if (ni != NULL) { 3966 struct ifnet *ifp = ni->ni_vap->iv_ifp; 3967 3968 if (status == 0) { 3969 if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len); 3970 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1); 3971 if (m->m_flags & M_MCAST) 3972 if_inc_counter(ifp, IFCOUNTER_OMCASTS, 1); 3973 } else 3974 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 3975 if (m->m_flags & M_TXCB) 3976 ieee80211_process_callback(ni, m, status); 3977 ieee80211_free_node(ni); 3978 } 3979 m_freem(m); 3980 } 3981
Indexes created Fri Sep 26 20:09:58 GMT 2025