ieee80211_output.c revision 1.63.2.6
1 /* $NetBSD: ieee80211_output.c,v 1.63.2.6 2020/04/13 08:05:16 martin 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 #ifdef __NetBSD__ 33 __KERNEL_RCSID(0, "$NetBSD: ieee80211_output.c,v 1.63.2.6 2020/04/13 08:05:16 martin Exp $"); 34 #endif 35 36 #ifdef _KERNEL_OPT 37 #include "opt_inet.h" 38 #include "opt_inet6.h" 39 #include "opt_wlan.h" 40 #endif 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/kernel.h> 45 #include <sys/malloc.h> 46 #include <sys/mbuf.h> 47 #include <sys/endian.h> 48 49 #include <sys/socket.h> 50 51 #include <net/bpf.h> 52 #if __FreeBSD__ 53 #include <net/ethernet.h> 54 #endif 55 #include <net/if.h> 56 #if __FreeBSD__ 57 #include <net/if_var.h> 58 #endif 59 #include <net/if_llc.h> 60 #include <net/if_media.h> 61 #if __FreeBSD__ 62 #include <net/if_vlan_var.h> 63 #endif 64 #ifdef __NetBSD__ 65 #include <net/if_ether.h> 66 #include <net/route.h> 67 #endif 68 69 #include <net80211/ieee80211_var.h> 70 #include <net80211/ieee80211_regdomain.h> 71 #ifdef IEEE80211_SUPPORT_SUPERG 72 #include <net80211/ieee80211_superg.h> 73 #endif 74 #ifdef IEEE80211_SUPPORT_TDMA 75 #include <net80211/ieee80211_tdma.h> 76 #endif 77 #include <net80211/ieee80211_wds.h> 78 #include <net80211/ieee80211_mesh.h> 79 #include <net80211/ieee80211_vht.h> 80 81 #if defined(INET) || defined(INET6) 82 #include <netinet/in.h> 83 #endif 84 85 #ifdef INET 86 #if __FreeBSD__ 87 #include <netinet/if_ether.h> 88 #endif 89 #include <netinet/in_systm.h> 90 #include <netinet/ip.h> 91 #endif 92 #ifdef INET6 93 #include <netinet/ip6.h> 94 #endif 95 96 #if __FreeBSD__ 97 #include <security/mac/mac_framework.h> 98 #endif 99 100 #ifdef __NetBSD__ 101 #undef KASSERT 102 #define KASSERT(__cond, __complaint) FBSDKASSERT(__cond, __complaint) 103 #endif 104 105 #define ETHER_HEADER_COPY(dst, src) \ 106 memcpy(dst, src, sizeof(struct ether_header)) 107 108 static int ieee80211_fragment(struct ieee80211vap *, struct mbuf *, 109 u_int hdrsize, u_int ciphdrsize, u_int mtu); 110 static void ieee80211_tx_mgt_cb(struct ieee80211_node *, void *, int); 111 112 #ifdef IEEE80211_DEBUG 113 /* 114 * Decide if an outbound management frame should be 115 * printed when debugging is enabled. This filters some 116 * of the less interesting frames that come frequently 117 * (e.g. beacons). 118 */ 119 static __inline int 120 doprint(struct ieee80211vap *vap, int subtype) 121 { 122 switch (subtype) { 123 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 124 return (vap->iv_opmode == IEEE80211_M_IBSS); 125 } 126 return 1; 127 } 128 #endif 129 130 /* 131 * Transmit a frame to the given destination on the given VAP. 132 * 133 * It's up to the caller to figure out the details of who this 134 * is going to and resolving the node. 135 * 136 * This routine takes care of queuing it for power save, 137 * A-MPDU state stuff, fast-frames state stuff, encapsulation 138 * if required, then passing it up to the driver layer. 139 * 140 * This routine (for now) consumes the mbuf and frees the node 141 * reference; it ideally will return a TX status which reflects 142 * whether the mbuf was consumed or not, so the caller can 143 * free the mbuf (if appropriate) and the node reference (again, 144 * if appropriate.) 145 */ 146 int 147 ieee80211_vap_pkt_send_dest(struct ieee80211vap *vap, struct mbuf *m, 148 struct ieee80211_node *ni) 149 { 150 struct ieee80211com *ic = vap->iv_ic; 151 struct ifnet *ifp = vap->iv_ifp; 152 int mcast; 153 154 if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) && 155 (m->m_flags & M_PWR_SAV) == 0) { 156 /* 157 * Station in power save mode; pass the frame 158 * to the 802.11 layer and continue. We'll get 159 * the frame back when the time is right. 160 * XXX lose WDS vap linkage? 161 */ 162 if (ieee80211_pwrsave(ni, m) != 0) 163 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 164 ieee80211_free_node(ni); 165 166 /* 167 * We queued it fine, so tell the upper layer 168 * that we consumed it. 169 */ 170 return (0); 171 } 172 /* calculate priority so drivers can find the tx queue */ 173 if (ieee80211_classify(ni, m)) { 174 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_OUTPUT, 175 ni->ni_macaddr, NULL, 176 "%s", "classification failure"); 177 vap->iv_stats.is_tx_classify++; 178 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 179 m_freem(m); 180 ieee80211_free_node(ni); 181 182 /* XXX better status? */ 183 return (0); 184 } 185 /* 186 * Stash the node pointer. Note that we do this after 187 * any call to ieee80211_dwds_mcast because that code 188 * uses any existing value for rcvif to identify the 189 * interface it (might have been) received on. 190 */ 191 #if __FreeBSD__ 192 m->m_pkthdr.rcvif = (void *)ni; 193 #elif __NetBSD__ 194 m_set_rcvif(m, (void *)ni); 195 #endif 196 mcast = (m->m_flags & (M_MCAST | M_BCAST)) ? 1: 0; 197 198 BPF_MTAP(ifp, m); /* 802.3 tx */ 199 200 /* 201 * Check if A-MPDU tx aggregation is setup or if we 202 * should try to enable it. The sta must be associated 203 * with HT and A-MPDU enabled for use. When the policy 204 * routine decides we should enable A-MPDU we issue an 205 * ADDBA request and wait for a reply. The frame being 206 * encapsulated will go out w/o using A-MPDU, or possibly 207 * it might be collected by the driver and held/retransmit. 208 * The default ic_ampdu_enable routine handles staggering 209 * ADDBA requests in case the receiver NAK's us or we are 210 * otherwise unable to establish a BA stream. 211 * 212 * Don't treat group-addressed frames as candidates for aggregation; 213 * net80211 doesn't support 802.11aa-2012 and so group addressed 214 * frames will always have sequence numbers allocated from the NON_QOS 215 * TID. 216 */ 217 if ((ni->ni_flags & IEEE80211_NODE_AMPDU_TX) && 218 (vap->iv_flags_ht & IEEE80211_FHT_AMPDU_TX)) { 219 if ((m->m_flags & M_EAPOL) == 0 && (! mcast)) { 220 int tid = WME_AC_TO_TID(M_WME_GETAC(m)); 221 struct ieee80211_tx_ampdu *tap = &ni->ni_tx_ampdu[tid]; 222 223 ieee80211_txampdu_count_packet(tap); 224 if (IEEE80211_AMPDU_RUNNING(tap)) { 225 /* 226 * Operational, mark frame for aggregation. 227 * 228 * XXX do tx aggregation here 229 */ 230 m->m_flags |= M_AMPDU_MPDU; 231 } else if (!IEEE80211_AMPDU_REQUESTED(tap) && 232 ic->ic_ampdu_enable(ni, tap)) { 233 /* 234 * Not negotiated yet, request service. 235 */ 236 ieee80211_ampdu_request(ni, tap); 237 /* XXX hold frame for reply? */ 238 } 239 } 240 } 241 242 #ifdef IEEE80211_SUPPORT_SUPERG 243 /* 244 * Check for AMSDU/FF; queue for aggregation 245 * 246 * Note: we don't bother trying to do fast frames or 247 * A-MSDU encapsulation for 802.3 drivers. Now, we 248 * likely could do it for FF (because it's a magic 249 * atheros tunnel LLC type) but I don't think we're going 250 * to really need to. For A-MSDU we'd have to set the 251 * A-MSDU QoS bit in the wifi header, so we just plain 252 * can't do it. 253 * 254 * Strictly speaking, we could actually /do/ A-MSDU / FF 255 * with A-MPDU together which for certain circumstances 256 * is beneficial (eg A-MSDU of TCK ACKs.) However, 257 * I'll ignore that for now so existing behaviour is maintained. 258 * Later on it would be good to make "amsdu + ampdu" configurable. 259 */ 260 else if (__predict_true((vap->iv_caps & IEEE80211_C_8023ENCAP) == 0)) { 261 if ((! mcast) && ieee80211_amsdu_tx_ok(ni)) { 262 m = ieee80211_amsdu_check(ni, m); 263 if (m == NULL) { 264 /* NB: any ni ref held on stageq */ 265 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG, 266 "%s: amsdu_check queued frame\n", 267 __func__); 268 return (0); 269 } 270 } else if ((! mcast) && IEEE80211_ATH_CAP(vap, ni, 271 IEEE80211_NODE_FF)) { 272 m = ieee80211_ff_check(ni, m); 273 if (m == NULL) { 274 /* NB: any ni ref held on stageq */ 275 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG, 276 "%s: ff_check queued frame\n", 277 __func__); 278 return (0); 279 } 280 } 281 } 282 #endif /* IEEE80211_SUPPORT_SUPERG */ 283 284 /* 285 * Grab the TX lock - serialise the TX process from this 286 * point (where TX state is being checked/modified) 287 * through to driver queue. 288 */ 289 IEEE80211_TX_LOCK(ic); 290 291 /* 292 * XXX make the encap and transmit code a separate function 293 * so things like the FF (and later A-MSDU) path can just call 294 * it for flushed frames. 295 */ 296 if (__predict_true((vap->iv_caps & IEEE80211_C_8023ENCAP) == 0)) { 297 /* 298 * Encapsulate the packet in prep for transmission. 299 */ 300 m = ieee80211_encap(vap, ni, m); 301 if (m == NULL) { 302 /* NB: stat+msg handled in ieee80211_encap */ 303 IEEE80211_TX_UNLOCK(ic); 304 ieee80211_free_node(ni); 305 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 306 return (ENOBUFS); 307 } 308 } 309 (void) ieee80211_parent_xmitpkt(ic, m); 310 311 /* 312 * Unlock at this point - no need to hold it across 313 * ieee80211_free_node() (ie, the comlock) 314 */ 315 IEEE80211_TX_UNLOCK(ic); 316 ic->ic_lastdata = ticks; 317 318 return (0); 319 } 320 321 322 323 /* 324 * Send the given mbuf through the given vap. 325 * 326 * This consumes the mbuf regardless of whether the transmit 327 * was successful or not. 328 * 329 * This does none of the initial checks that ieee80211_start() 330 * does (eg CAC timeout, interface wakeup) - the caller must 331 * do this first. 332 */ 333 static int 334 ieee80211_start_pkt(struct ieee80211vap *vap, struct mbuf *m) 335 { 336 #define IS_DWDS(vap) \ 337 (vap->iv_opmode == IEEE80211_M_WDS && \ 338 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) == 0) 339 struct ieee80211com *ic = vap->iv_ic; 340 struct ifnet *ifp = vap->iv_ifp; 341 struct ieee80211_node *ni; 342 struct ether_header *eh; 343 344 /* 345 * Cancel any background scan. 346 */ 347 if (ic->ic_flags & IEEE80211_F_SCAN) 348 ieee80211_cancel_anyscan(vap); 349 /* 350 * Find the node for the destination so we can do 351 * things like power save and fast frames aggregation. 352 * 353 * NB: past this point various code assumes the first 354 * mbuf has the 802.3 header present (and contiguous). 355 */ 356 ni = NULL; 357 if (m->m_len < sizeof(struct ether_header) && 358 (m = m_pullup(m, sizeof(struct ether_header))) == NULL) { 359 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 360 "discard frame, %s\n", "m_pullup failed"); 361 vap->iv_stats.is_tx_nobuf++; /* XXX */ 362 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 363 return (ENOBUFS); 364 } 365 eh = mtod(m, struct ether_header *); 366 if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 367 if (IS_DWDS(vap)) { 368 /* 369 * Only unicast frames from the above go out 370 * DWDS vaps; multicast frames are handled by 371 * dispatching the frame as it comes through 372 * the AP vap (see below). 373 */ 374 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_WDS, 375 eh->ether_dhost, "mcast", "%s", "on DWDS"); 376 vap->iv_stats.is_dwds_mcast++; 377 m_freem(m); 378 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 379 /* XXX better status? */ 380 return (ENOBUFS); 381 } 382 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 383 /* 384 * Spam DWDS vap's w/ multicast traffic. 385 */ 386 /* XXX only if dwds in use? */ 387 ieee80211_dwds_mcast(vap, m); 388 } 389 } 390 #ifdef IEEE80211_SUPPORT_MESH 391 if (vap->iv_opmode != IEEE80211_M_MBSS) { 392 #endif 393 ni = ieee80211_find_txnode(vap, eh->ether_dhost); 394 if (ni == NULL) { 395 /* NB: ieee80211_find_txnode does stat+msg */ 396 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 397 m_freem(m); 398 /* XXX better status? */ 399 return (ENOBUFS); 400 } 401 if (ni->ni_associd == 0 && 402 (ni->ni_flags & IEEE80211_NODE_ASSOCID)) { 403 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_OUTPUT, 404 eh->ether_dhost, NULL, 405 "sta not associated (type 0x%04x)", 406 htons(eh->ether_type)); 407 vap->iv_stats.is_tx_notassoc++; 408 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 409 m_freem(m); 410 ieee80211_free_node(ni); 411 /* XXX better status? */ 412 return (ENOBUFS); 413 } 414 #ifdef IEEE80211_SUPPORT_MESH 415 } else { 416 if (!IEEE80211_ADDR_EQ(eh->ether_shost, vap->iv_myaddr)) { 417 /* 418 * Proxy station only if configured. 419 */ 420 if (!ieee80211_mesh_isproxyena(vap)) { 421 IEEE80211_DISCARD_MAC(vap, 422 IEEE80211_MSG_OUTPUT | 423 IEEE80211_MSG_MESH, 424 eh->ether_dhost, NULL, 425 "%s", "proxy not enabled"); 426 vap->iv_stats.is_mesh_notproxy++; 427 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 428 m_freem(m); 429 /* XXX better status? */ 430 return (ENOBUFS); 431 } 432 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 433 "forward frame from DS SA(%6D), DA(%6D)\n", 434 eh->ether_shost, ":", 435 eh->ether_dhost, ":"); 436 ieee80211_mesh_proxy_check(vap, eh->ether_shost); 437 } 438 ni = ieee80211_mesh_discover(vap, eh->ether_dhost, m); 439 if (ni == NULL) { 440 /* 441 * NB: ieee80211_mesh_discover holds/disposes 442 * frame (e.g. queueing on path discovery). 443 */ 444 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 445 /* XXX better status? */ 446 return (ENOBUFS); 447 } 448 } 449 #endif 450 451 /* 452 * We've resolved the sender, so attempt to transmit it. 453 */ 454 455 if (vap->iv_state == IEEE80211_S_SLEEP) { 456 /* 457 * In power save; queue frame and then wakeup device 458 * for transmit. 459 */ 460 ic->ic_lastdata = ticks; 461 if (ieee80211_pwrsave(ni, m) != 0) 462 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 463 ieee80211_free_node(ni); 464 ieee80211_new_state(vap, IEEE80211_S_RUN, 0); 465 return (0); 466 } 467 468 if (ieee80211_vap_pkt_send_dest(vap, m, ni) != 0) 469 return (ENOBUFS); 470 return (0); 471 #undef IS_DWDS 472 } 473 474 /* 475 * Start method for vap's. All packets from the stack come 476 * through here. We handle common processing of the packets 477 * before dispatching them to the underlying device. 478 * 479 * if_transmit() requires that the mbuf be consumed by this call 480 * regardless of the return condition. 481 */ 482 int 483 ieee80211_vap_transmit(struct ifnet *ifp, struct mbuf *m) 484 { 485 struct ieee80211vap *vap = ifp->if_softc; 486 struct ieee80211com *ic = vap->iv_ic; 487 488 /* 489 * No data frames go out unless we're running. 490 * Note in particular this covers CAC and CSA 491 * states (though maybe we should check muting 492 * for CSA). 493 */ 494 if (vap->iv_state != IEEE80211_S_RUN && 495 vap->iv_state != IEEE80211_S_SLEEP) { 496 IEEE80211_LOCK(ic); 497 /* re-check under the com lock to avoid races */ 498 if (vap->iv_state != IEEE80211_S_RUN && 499 vap->iv_state != IEEE80211_S_SLEEP) { 500 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 501 "%s: ignore queue, in %s state\n", 502 __func__, ieee80211_state_name[vap->iv_state]); 503 vap->iv_stats.is_tx_badstate++; 504 IEEE80211_UNLOCK(ic); 505 #if __FreeBSD__ 506 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 507 #elif __NetBSD__ 508 ifp->if_flags |= IFF_OACTIVE; 509 #endif 510 m_freem(m); 511 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 512 return (ENETDOWN); 513 } 514 IEEE80211_UNLOCK(ic); 515 } 516 517 /* 518 * Sanitize mbuf flags for net80211 use. We cannot 519 * clear M_PWR_SAV or M_MORE_DATA because these may 520 * be set for frames that are re-submitted from the 521 * power save queue. 522 * 523 * NB: This must be done before ieee80211_classify as 524 * it marks EAPOL in frames with M_EAPOL. 525 */ 526 m->m_flags &= ~(M_80211_TX - M_PWR_SAV - M_MORE_DATA); 527 528 /* 529 * Bump to the packet transmission path. 530 * The mbuf will be consumed here. 531 */ 532 return (ieee80211_start_pkt(vap, m)); 533 } 534 535 void 536 ieee80211_vap_qflush(struct ifnet *ifp) 537 { 538 539 /* Empty for now */ 540 } 541 542 /* 543 * 802.11 raw output routine. 544 * 545 * XXX TODO: this (and other send routines) should correctly 546 * XXX keep the pwr mgmt bit set if it decides to call into the 547 * XXX driver to send a frame whilst the state is SLEEP. 548 * 549 * Otherwise the peer may decide that we're awake and flood us 550 * with traffic we are still too asleep to receive! 551 */ 552 int 553 ieee80211_raw_output(struct ieee80211vap *vap, struct ieee80211_node *ni, 554 struct mbuf *m, const struct ieee80211_bpf_params *params) 555 { 556 struct ieee80211com *ic = vap->iv_ic; 557 int error; 558 559 /* 560 * Set node - the caller has taken a reference, so ensure 561 * that the mbuf has the same node value that 562 * it would if it were going via the normal path. 563 */ 564 #if __FreeBSD__ 565 m->m_pkthdr.rcvif = (void *)ni; 566 #elif __NetBSD__ 567 m_set_rcvif(m, (void*)ni); 568 #endif 569 570 /* 571 * Attempt to add bpf transmit parameters. 572 * 573 * For now it's ok to fail; the raw_xmit api still takes 574 * them as an option. 575 * 576 * Later on when ic_raw_xmit() has params removed, 577 * they'll have to be added - so fail the transmit if 578 * they can't be. 579 */ 580 if (params) 581 (void) ieee80211_add_xmit_params(m, params); 582 583 error = ic->ic_raw_xmit(ni, m, params); 584 if (error) { 585 if_inc_counter(vap->iv_ifp, IFCOUNTER_OERRORS, 1); 586 ieee80211_free_node(ni); 587 } 588 return (error); 589 } 590 591 static int 592 ieee80211_validate_frame(struct mbuf *m, 593 const struct ieee80211_bpf_params *params) 594 { 595 struct ieee80211_frame *wh; 596 int type; 597 598 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_ack)) 599 return (EINVAL); 600 601 wh = mtod(m, struct ieee80211_frame *); 602 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 603 IEEE80211_FC0_VERSION_0) 604 return (EINVAL); 605 606 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 607 if (type != IEEE80211_FC0_TYPE_DATA) { 608 if ((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) != 609 IEEE80211_FC1_DIR_NODS) 610 return (EINVAL); 611 612 if (type != IEEE80211_FC0_TYPE_MGT && 613 (wh->i_fc[1] & IEEE80211_FC1_MORE_FRAG) != 0) 614 return (EINVAL); 615 616 /* XXX skip other field checks? */ 617 } 618 619 if ((params && (params->ibp_flags & IEEE80211_BPF_CRYPTO) != 0) || 620 (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) != 0) { 621 int subtype; 622 623 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 624 625 /* 626 * See IEEE Std 802.11-2012, 627 * 8.2.4.1.9 'Protected Frame field' 628 */ 629 /* XXX no support for robust management frames yet. */ 630 if (!(type == IEEE80211_FC0_TYPE_DATA || 631 (type == IEEE80211_FC0_TYPE_MGT && 632 subtype == IEEE80211_FC0_SUBTYPE_AUTH))) 633 return (EINVAL); 634 635 wh->i_fc[1] |= IEEE80211_FC1_PROTECTED; 636 } 637 638 if (m->m_pkthdr.len < ieee80211_anyhdrsize(wh)) 639 return (EINVAL); 640 641 return (0); 642 } 643 644 /* 645 * 802.11 output routine. This is (currently) used only to 646 * connect bpf write calls to the 802.11 layer for injecting 647 * raw 802.11 frames. 648 */ 649 #if __FreeBSD__ 650 int 651 ieee80211_output(struct ifnet *ifp, struct mbuf *m, 652 const struct sockaddr *dst, struct route *ro) 653 #elif __NetBSD__ 654 int 655 ieee80211_output(struct ifnet *ifp, struct mbuf *m, 656 const struct sockaddr *dst, const struct rtentry *ro) 657 #endif 658 { 659 #define senderr(e) do { error = (e); goto bad;} while (0) 660 const struct ieee80211_bpf_params *params = NULL; 661 struct ieee80211_node *ni = NULL; 662 struct ieee80211vap *vap; 663 struct ieee80211_frame *wh; 664 struct ieee80211com *ic = NULL; 665 int error; 666 int ret; 667 668 #if __FreeBSD__ 669 if (ifp->if_drv_flags & IFF_DRV_OACTIVE) { 670 #elif __NetBSD__ 671 if (ifp->if_flags & IFF_OACTIVE) { 672 #endif 673 /* 674 * Short-circuit requests if the vap is marked OACTIVE 675 * as this can happen because a packet came down through 676 * ieee80211_start before the vap entered RUN state in 677 * which case it's ok to just drop the frame. This 678 * should not be necessary but callers of if_output don't 679 * check OACTIVE. 680 */ 681 senderr(ENETDOWN); 682 } 683 vap = ifp->if_softc; 684 ic = vap->iv_ic; 685 /* 686 * Hand to the 802.3 code if not tagged as 687 * a raw 802.11 frame. 688 */ 689 if (dst->sa_family != AF_IEEE80211) 690 return vap->iv_output(ifp, m, dst, ro); 691 #ifdef MAC 692 error = mac_ifnet_check_transmit(ifp, m); 693 if (error) 694 senderr(error); 695 #endif 696 #if __FreeBSD__ 697 if (ifp->if_flags & IFF_MONITOR) 698 senderr(ENETDOWN); 699 #endif 700 if (!IFNET_IS_UP_RUNNING(ifp)) 701 senderr(ENETDOWN); 702 if (vap->iv_state == IEEE80211_S_CAC) { 703 IEEE80211_DPRINTF(vap, 704 IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH, 705 "block %s frame in CAC state\n", "raw data"); 706 vap->iv_stats.is_tx_badstate++; 707 senderr(EIO); /* XXX */ 708 } else if (vap->iv_state == IEEE80211_S_SCAN) 709 senderr(EIO); 710 /* XXX bypass bridge, pfil, carp, etc. */ 711 712 /* 713 * NB: DLT_IEEE802_11_RADIO identifies the parameters are 714 * present by setting the sa_len field of the sockaddr (yes, 715 * this is a hack). 716 * NB: we assume sa_data is suitably aligned to cast. 717 */ 718 if (dst->sa_len != 0) 719 params = (const struct ieee80211_bpf_params *)dst->sa_data; 720 721 error = ieee80211_validate_frame(m, params); 722 if (error != 0) 723 senderr(error); 724 725 wh = mtod(m, struct ieee80211_frame *); 726 727 /* locate destination node */ 728 switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) { 729 case IEEE80211_FC1_DIR_NODS: 730 case IEEE80211_FC1_DIR_FROMDS: 731 ni = ieee80211_find_txnode(vap, wh->i_addr1); 732 break; 733 case IEEE80211_FC1_DIR_TODS: 734 case IEEE80211_FC1_DIR_DSTODS: 735 ni = ieee80211_find_txnode(vap, wh->i_addr3); 736 break; 737 default: 738 senderr(EDOOFUS); 739 } 740 if (ni == NULL) { 741 /* 742 * Permit packets w/ bpf params through regardless 743 * (see below about sa_len). 744 */ 745 if (dst->sa_len == 0) 746 senderr(EHOSTUNREACH); 747 ni = ieee80211_ref_node(vap->iv_bss); 748 } 749 750 /* 751 * Sanitize mbuf for net80211 flags leaked from above. 752 * 753 * NB: This must be done before ieee80211_classify as 754 * it marks EAPOL in frames with M_EAPOL. 755 */ 756 m->m_flags &= ~M_80211_TX; 757 m->m_flags |= M_ENCAP; /* mark encapsulated */ 758 759 if (IEEE80211_IS_DATA(wh)) { 760 /* calculate priority so drivers can find the tx queue */ 761 if (ieee80211_classify(ni, m)) 762 senderr(EIO); /* XXX */ 763 764 /* NB: ieee80211_encap does not include 802.11 header */ 765 IEEE80211_NODE_STAT_ADD(ni, tx_bytes, 766 m->m_pkthdr.len - ieee80211_hdrsize(wh)); 767 } else 768 M_WME_SETAC(m, WME_AC_BE); 769 770 IEEE80211_NODE_STAT(ni, tx_data); 771 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 772 IEEE80211_NODE_STAT(ni, tx_mcast); 773 m->m_flags |= M_MCAST; 774 } else 775 IEEE80211_NODE_STAT(ni, tx_ucast); 776 777 IEEE80211_TX_LOCK(ic); 778 ret = ieee80211_raw_output(vap, ni, m, params); 779 IEEE80211_TX_UNLOCK(ic); 780 return (ret); 781 bad: 782 if (m != NULL) 783 m_freem(m); 784 if (ni != NULL) 785 ieee80211_free_node(ni); 786 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 787 return error; 788 #undef senderr 789 } 790 791 /* 792 * Set the direction field and address fields of an outgoing 793 * frame. Note this should be called early on in constructing 794 * a frame as it sets i_fc[1]; other bits can then be or'd in. 795 */ 796 void 797 ieee80211_send_setup( 798 struct ieee80211_node *ni, 799 struct mbuf *m, 800 int type, int tid, 801 const uint8_t sa[IEEE80211_ADDR_LEN], 802 const uint8_t da[IEEE80211_ADDR_LEN], 803 const uint8_t bssid[IEEE80211_ADDR_LEN]) 804 { 805 #define WH4(wh) ((struct ieee80211_frame_addr4 *)wh) 806 struct ieee80211vap *vap = ni->ni_vap; 807 struct ieee80211_tx_ampdu *tap; 808 struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *); 809 ieee80211_seq seqno; 810 811 IEEE80211_TX_LOCK_ASSERT(ni->ni_ic); 812 813 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | type; 814 if ((type & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_DATA) { 815 switch (vap->iv_opmode) { 816 case IEEE80211_M_STA: 817 wh->i_fc[1] = IEEE80211_FC1_DIR_TODS; 818 IEEE80211_ADDR_COPY(wh->i_addr1, bssid); 819 IEEE80211_ADDR_COPY(wh->i_addr2, sa); 820 IEEE80211_ADDR_COPY(wh->i_addr3, da); 821 break; 822 case IEEE80211_M_IBSS: 823 case IEEE80211_M_AHDEMO: 824 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 825 IEEE80211_ADDR_COPY(wh->i_addr1, da); 826 IEEE80211_ADDR_COPY(wh->i_addr2, sa); 827 IEEE80211_ADDR_COPY(wh->i_addr3, bssid); 828 break; 829 case IEEE80211_M_HOSTAP: 830 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS; 831 IEEE80211_ADDR_COPY(wh->i_addr1, da); 832 IEEE80211_ADDR_COPY(wh->i_addr2, bssid); 833 IEEE80211_ADDR_COPY(wh->i_addr3, sa); 834 break; 835 case IEEE80211_M_WDS: 836 wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS; 837 IEEE80211_ADDR_COPY(wh->i_addr1, da); 838 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); 839 IEEE80211_ADDR_COPY(wh->i_addr3, da); 840 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, sa); 841 break; 842 case IEEE80211_M_MBSS: 843 #ifdef IEEE80211_SUPPORT_MESH 844 if (IEEE80211_IS_MULTICAST(da)) { 845 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS; 846 /* XXX next hop */ 847 IEEE80211_ADDR_COPY(wh->i_addr1, da); 848 IEEE80211_ADDR_COPY(wh->i_addr2, 849 vap->iv_myaddr); 850 } else { 851 wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS; 852 IEEE80211_ADDR_COPY(wh->i_addr1, da); 853 IEEE80211_ADDR_COPY(wh->i_addr2, 854 vap->iv_myaddr); 855 IEEE80211_ADDR_COPY(wh->i_addr3, da); 856 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, sa); 857 } 858 #endif 859 break; 860 case IEEE80211_M_MONITOR: /* NB: to quiet compiler */ 861 break; 862 } 863 } else { 864 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 865 IEEE80211_ADDR_COPY(wh->i_addr1, da); 866 IEEE80211_ADDR_COPY(wh->i_addr2, sa); 867 #ifdef IEEE80211_SUPPORT_MESH 868 if (vap->iv_opmode == IEEE80211_M_MBSS) 869 IEEE80211_ADDR_COPY(wh->i_addr3, sa); 870 else 871 #endif 872 IEEE80211_ADDR_COPY(wh->i_addr3, bssid); 873 } 874 *(uint16_t *)&wh->i_dur[0] = 0; 875 876 /* 877 * XXX TODO: this is what the TX lock is for. 878 * Here we're incrementing sequence numbers, and they 879 * need to be in lock-step with what the driver is doing 880 * both in TX ordering and crypto encap (IV increment.) 881 * 882 * If the driver does seqno itself, then we can skip 883 * assigning sequence numbers here, and we can avoid 884 * requiring the TX lock. 885 */ 886 tap = &ni->ni_tx_ampdu[tid]; 887 if (tid != IEEE80211_NONQOS_TID && IEEE80211_AMPDU_RUNNING(tap)) { 888 m->m_flags |= M_AMPDU_MPDU; 889 890 /* NB: zero out i_seq field (for s/w encryption etc) */ 891 *(uint16_t *)&wh->i_seq[0] = 0; 892 } else { 893 if (IEEE80211_HAS_SEQ(type & IEEE80211_FC0_TYPE_MASK, 894 type & IEEE80211_FC0_SUBTYPE_MASK)) 895 /* 896 * 802.11-2012 9.3.2.10 - QoS multicast frames 897 * come out of a different seqno space. 898 */ 899 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 900 seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]++; 901 } else { 902 seqno = ni->ni_txseqs[tid]++; 903 } 904 else 905 seqno = 0; 906 907 *(uint16_t *)&wh->i_seq[0] = 908 htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); 909 M_SEQNO_SET(m, seqno); 910 } 911 912 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) 913 m->m_flags |= M_MCAST; 914 #undef WH4 915 } 916 917 /* 918 * Send a management frame to the specified node. The node pointer 919 * must have a reference as the pointer will be passed to the driver 920 * and potentially held for a long time. If the frame is successfully 921 * dispatched to the driver, then it is responsible for freeing the 922 * reference (and potentially free'ing up any associated storage); 923 * otherwise deal with reclaiming any reference (on error). 924 */ 925 int 926 ieee80211_mgmt_output(struct ieee80211_node *ni, struct mbuf *m, int type, 927 struct ieee80211_bpf_params *params) 928 { 929 struct ieee80211vap *vap = ni->ni_vap; 930 struct ieee80211com *ic = ni->ni_ic; 931 struct ieee80211_frame *wh; 932 int ret; 933 934 KASSERT(ni != NULL, ("null node")); 935 936 if (vap->iv_state == IEEE80211_S_CAC) { 937 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH, 938 ni, "block %s frame in CAC state", 939 ieee80211_mgt_subtype_name(type)); 940 vap->iv_stats.is_tx_badstate++; 941 ieee80211_free_node(ni); 942 m_freem(m); 943 return EIO; /* XXX */ 944 } 945 946 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); 947 if (m == NULL) { 948 ieee80211_free_node(ni); 949 return ENOMEM; 950 } 951 952 IEEE80211_TX_LOCK(ic); 953 954 wh = mtod(m, struct ieee80211_frame *); 955 ieee80211_send_setup(ni, m, 956 IEEE80211_FC0_TYPE_MGT | type, IEEE80211_NONQOS_TID, 957 vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid); 958 if (params->ibp_flags & IEEE80211_BPF_CRYPTO) { 959 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr1, 960 "encrypting frame (%s)", __func__); 961 wh->i_fc[1] |= IEEE80211_FC1_PROTECTED; 962 } 963 m->m_flags |= M_ENCAP; /* mark encapsulated */ 964 965 KASSERT(type != IEEE80211_FC0_SUBTYPE_PROBE_RESP, ("probe response?")); 966 M_WME_SETAC(m, params->ibp_pri); 967 968 #ifdef IEEE80211_DEBUG 969 /* avoid printing too many frames */ 970 if ((ieee80211_msg_debug(vap) && doprint(vap, type)) || 971 ieee80211_msg_dumppkts(vap)) { 972 printf("[%s] send %s on channel %u\n", 973 ether_sprintf(wh->i_addr1), 974 ieee80211_mgt_subtype_name(type), 975 ieee80211_chan2ieee(ic, ic->ic_curchan)); 976 } 977 #endif 978 IEEE80211_NODE_STAT(ni, tx_mgmt); 979 980 ret = ieee80211_raw_output(vap, ni, m, params); 981 IEEE80211_TX_UNLOCK(ic); 982 return (ret); 983 } 984 985 static void 986 ieee80211_nulldata_transmitted(struct ieee80211_node *ni, void *arg, 987 int status) 988 { 989 struct ieee80211vap *vap = ni->ni_vap; 990 991 wakeup(vap); 992 } 993 994 /* 995 * Send a null data frame to the specified node. If the station 996 * is setup for QoS then a QoS Null Data frame is constructed. 997 * If this is a WDS station then a 4-address frame is constructed. 998 * 999 * NB: the caller is assumed to have setup a node reference 1000 * for use; this is necessary to deal with a race condition 1001 * when probing for inactive stations. Like ieee80211_mgmt_output 1002 * we must cleanup any node reference on error; however we 1003 * can safely just unref it as we know it will never be the 1004 * last reference to the node. 1005 */ 1006 int 1007 ieee80211_send_nulldata(struct ieee80211_node *ni) 1008 { 1009 struct ieee80211vap *vap = ni->ni_vap; 1010 struct ieee80211com *ic = ni->ni_ic; 1011 struct mbuf *m; 1012 struct ieee80211_frame *wh; 1013 int hdrlen; 1014 uint8_t *frm; 1015 int ret; 1016 1017 if (vap->iv_state == IEEE80211_S_CAC) { 1018 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH, 1019 ni, "block %s frame in CAC state", "null data"); 1020 ieee80211_unref_node(&ni); 1021 vap->iv_stats.is_tx_badstate++; 1022 return EIO; /* XXX */ 1023 } 1024 1025 if (ni->ni_flags & (IEEE80211_NODE_QOS|IEEE80211_NODE_HT)) 1026 hdrlen = sizeof(struct ieee80211_qosframe); 1027 else 1028 hdrlen = sizeof(struct ieee80211_frame); 1029 /* NB: only WDS vap's get 4-address frames */ 1030 if (vap->iv_opmode == IEEE80211_M_WDS) 1031 hdrlen += IEEE80211_ADDR_LEN; 1032 if (ic->ic_flags & IEEE80211_F_DATAPAD) 1033 hdrlen = roundup(hdrlen, sizeof(uint32_t)); 1034 1035 m = ieee80211_getmgtframe(&frm, ic->ic_headroom + hdrlen, 0); 1036 if (m == NULL) { 1037 /* XXX debug msg */ 1038 ieee80211_unref_node(&ni); 1039 vap->iv_stats.is_tx_nobuf++; 1040 return ENOMEM; 1041 } 1042 KASSERT(M_LEADINGSPACE(m) >= hdrlen, 1043 ("leading space %zd", M_LEADINGSPACE(m))); 1044 M_PREPEND(m, hdrlen, M_NOWAIT); 1045 if (m == NULL) { 1046 /* NB: cannot happen */ 1047 ieee80211_free_node(ni); 1048 return ENOMEM; 1049 } 1050 1051 IEEE80211_TX_LOCK(ic); 1052 1053 wh = mtod(m, struct ieee80211_frame *); /* NB: a little lie */ 1054 if (ni->ni_flags & IEEE80211_NODE_QOS) { 1055 const int tid = WME_AC_TO_TID(WME_AC_BE); 1056 uint8_t *qos; 1057 1058 ieee80211_send_setup(ni, m, 1059 IEEE80211_FC0_TYPE_DATA | IEEE80211_FC0_SUBTYPE_QOS_NULL, 1060 tid, vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid); 1061 1062 if (vap->iv_opmode == IEEE80211_M_WDS) 1063 qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos; 1064 else 1065 qos = ((struct ieee80211_qosframe *) wh)->i_qos; 1066 qos[0] = tid & IEEE80211_QOS_TID; 1067 if (ic->ic_wme.wme_wmeChanParams.cap_wmeParams[WME_AC_BE].wmep_noackPolicy) 1068 qos[0] |= IEEE80211_QOS_ACKPOLICY_NOACK; 1069 qos[1] = 0; 1070 } else { 1071 ieee80211_send_setup(ni, m, 1072 IEEE80211_FC0_TYPE_DATA | IEEE80211_FC0_SUBTYPE_NODATA, 1073 IEEE80211_NONQOS_TID, 1074 vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid); 1075 } 1076 if (vap->iv_opmode != IEEE80211_M_WDS) { 1077 /* NB: power management bit is never sent by an AP */ 1078 if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) && 1079 vap->iv_opmode != IEEE80211_M_HOSTAP) 1080 wh->i_fc[1] |= IEEE80211_FC1_PWR_MGT; 1081 } 1082 if ((ic->ic_flags & IEEE80211_F_SCAN) && 1083 (ni->ni_flags & IEEE80211_NODE_PWR_MGT)) { 1084 ieee80211_add_callback(m, ieee80211_nulldata_transmitted, 1085 NULL); 1086 } 1087 m->m_len = m->m_pkthdr.len = hdrlen; 1088 m->m_flags |= M_ENCAP; /* mark encapsulated */ 1089 1090 M_WME_SETAC(m, WME_AC_BE); 1091 1092 IEEE80211_NODE_STAT(ni, tx_data); 1093 1094 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS, ni, 1095 "send %snull data frame on channel %u, pwr mgt %s", 1096 ni->ni_flags & IEEE80211_NODE_QOS ? "QoS " : "", 1097 ieee80211_chan2ieee(ic, ic->ic_curchan), 1098 wh->i_fc[1] & IEEE80211_FC1_PWR_MGT ? "ena" : "dis"); 1099 1100 ret = ieee80211_raw_output(vap, ni, m, NULL); 1101 IEEE80211_TX_UNLOCK(ic); 1102 return (ret); 1103 } 1104 1105 /* 1106 * Assign priority to a frame based on any vlan tag assigned 1107 * to the station and/or any Diffserv setting in an IP header. 1108 * Finally, if an ACM policy is setup (in station mode) it's 1109 * applied. 1110 */ 1111 int 1112 ieee80211_classify(struct ieee80211_node *ni, struct mbuf *m) 1113 { 1114 const struct ether_header *eh = NULL; 1115 uint16_t ether_type; 1116 int v_wme_ac, d_wme_ac, ac; 1117 1118 if (__predict_false(m->m_flags & M_ENCAP)) { 1119 struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *); 1120 struct llc *llc; 1121 int hdrlen, subtype; 1122 1123 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1124 if (subtype & IEEE80211_FC0_SUBTYPE_NODATA) { 1125 ac = WME_AC_BE; 1126 goto done; 1127 } 1128 1129 hdrlen = ieee80211_hdrsize(wh); 1130 if (m->m_pkthdr.len < hdrlen + sizeof(*llc)) 1131 return 1; 1132 1133 llc = (struct llc *)mtodo(m, hdrlen); 1134 if (llc->llc_dsap != LLC_SNAP_LSAP || 1135 llc->llc_ssap != LLC_SNAP_LSAP || 1136 llc->llc_control != LLC_UI || 1137 llc->llc_snap.org_code[0] != 0 || 1138 llc->llc_snap.org_code[1] != 0 || 1139 llc->llc_snap.org_code[2] != 0) 1140 return 1; 1141 1142 ether_type = llc->llc_snap.ether_type; 1143 } else { 1144 eh = mtod(m, struct ether_header *); 1145 ether_type = eh->ether_type; 1146 } 1147 1148 /* 1149 * Always promote PAE/EAPOL frames to high priority. 1150 */ 1151 if (ether_type == htons(ETHERTYPE_PAE)) { 1152 /* NB: mark so others don't need to check header */ 1153 m->m_flags |= M_EAPOL; 1154 ac = WME_AC_VO; 1155 goto done; 1156 } 1157 /* 1158 * Non-qos traffic goes to BE. 1159 */ 1160 if ((ni->ni_flags & IEEE80211_NODE_QOS) == 0) { 1161 ac = WME_AC_BE; 1162 goto done; 1163 } 1164 1165 /* 1166 * If node has a vlan tag then all traffic 1167 * to it must have a matching tag. 1168 */ 1169 v_wme_ac = 0; 1170 if (ni->ni_vlan != 0) { 1171 if ((m->m_flags & M_VLANTAG) == 0) { 1172 IEEE80211_NODE_STAT(ni, tx_novlantag); 1173 return 1; 1174 } 1175 if (EVL_VLANOFTAG(m->m_pkthdr.ether_vtag) != 1176 EVL_VLANOFTAG(ni->ni_vlan)) { 1177 IEEE80211_NODE_STAT(ni, tx_vlanmismatch); 1178 return 1; 1179 } 1180 /* map vlan priority to AC */ 1181 v_wme_ac = TID_TO_WME_AC(EVL_PRIOFTAG(ni->ni_vlan)); 1182 } 1183 1184 /* XXX m_copydata may be too slow for fast path */ 1185 #ifdef INET 1186 if (eh && eh->ether_type == htons(ETHERTYPE_IP)) { 1187 uint8_t tos; 1188 /* 1189 * IP frame, map the DSCP bits from the TOS field. 1190 */ 1191 /* NB: ip header may not be in first mbuf */ 1192 m_copydata(m, sizeof(struct ether_header) + 1193 offsetof(struct ip, ip_tos), sizeof(tos), &tos); 1194 tos >>= 5; /* NB: ECN + low 3 bits of DSCP */ 1195 d_wme_ac = TID_TO_WME_AC(tos); 1196 } else { 1197 #endif /* INET */ 1198 #ifdef INET6 1199 if (eh && eh->ether_type == htons(ETHERTYPE_IPV6)) { 1200 uint32_t flow; 1201 uint8_t tos; 1202 /* 1203 * IPv6 frame, map the DSCP bits from the traffic class field. 1204 */ 1205 m_copydata(m, sizeof(struct ether_header) + 1206 offsetof(struct ip6_hdr, ip6_flow), sizeof(flow), 1207 (caddr_t) &flow); 1208 tos = (uint8_t)(ntohl(flow) >> 20); 1209 tos >>= 5; /* NB: ECN + low 3 bits of DSCP */ 1210 d_wme_ac = TID_TO_WME_AC(tos); 1211 } else { 1212 #endif /* INET6 */ 1213 d_wme_ac = WME_AC_BE; 1214 #ifdef INET6 1215 } 1216 #endif 1217 #ifdef INET 1218 } 1219 #endif 1220 /* 1221 * Use highest priority AC. 1222 */ 1223 if (v_wme_ac > d_wme_ac) 1224 ac = v_wme_ac; 1225 else 1226 ac = d_wme_ac; 1227 1228 /* 1229 * Apply ACM policy. 1230 */ 1231 if (ni->ni_vap->iv_opmode == IEEE80211_M_STA) { 1232 static const int acmap[4] = { 1233 WME_AC_BK, /* WME_AC_BE */ 1234 WME_AC_BK, /* WME_AC_BK */ 1235 WME_AC_BE, /* WME_AC_VI */ 1236 WME_AC_VI, /* WME_AC_VO */ 1237 }; 1238 struct ieee80211com *ic = ni->ni_ic; 1239 1240 while (ac != WME_AC_BK && 1241 ic->ic_wme.wme_wmeBssChanParams.cap_wmeParams[ac].wmep_acm) 1242 ac = acmap[ac]; 1243 } 1244 done: 1245 M_WME_SETAC(m, ac); 1246 return 0; 1247 } 1248 1249 /* 1250 * Insure there is sufficient contiguous space to encapsulate the 1251 * 802.11 data frame. If room isn't already there, arrange for it. 1252 * Drivers and cipher modules assume we have done the necessary work 1253 * and fail rudely if they don't find the space they need. 1254 */ 1255 struct mbuf * 1256 ieee80211_mbuf_adjust(struct ieee80211vap *vap, int hdrsize, 1257 struct ieee80211_key *key, struct mbuf *m) 1258 { 1259 #define TO_BE_RECLAIMED (sizeof(struct ether_header) - sizeof(struct llc)) 1260 int needed_space = vap->iv_ic->ic_headroom + hdrsize; 1261 1262 if (key != NULL) { 1263 /* XXX belongs in crypto code? */ 1264 needed_space += key->wk_cipher->ic_header; 1265 /* XXX frags */ 1266 /* 1267 * When crypto is being done in the host we must insure 1268 * the data are writable for the cipher routines; clone 1269 * a writable mbuf chain. 1270 * XXX handle SWMIC specially 1271 */ 1272 if (key->wk_flags & (IEEE80211_KEY_SWENCRYPT|IEEE80211_KEY_SWENMIC)) { 1273 m = m_unshare(m, M_NOWAIT); 1274 if (m == NULL) { 1275 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 1276 "%s: cannot get writable mbuf\n", __func__); 1277 vap->iv_stats.is_tx_nobuf++; /* XXX new stat */ 1278 return NULL; 1279 } 1280 } 1281 } 1282 /* 1283 * We know we are called just before stripping an Ethernet 1284 * header and prepending an LLC header. This means we know 1285 * there will be 1286 * sizeof(struct ether_header) - sizeof(struct llc) 1287 * bytes recovered to which we need additional space for the 1288 * 802.11 header and any crypto header. 1289 */ 1290 /* XXX check trailing space and copy instead? */ 1291 if (M_LEADINGSPACE(m) < needed_space - TO_BE_RECLAIMED) { 1292 struct mbuf *n = m_gethdr(M_NOWAIT, m->m_type); 1293 if (n == NULL) { 1294 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 1295 "%s: cannot expand storage\n", __func__); 1296 vap->iv_stats.is_tx_nobuf++; 1297 m_freem(m); 1298 return NULL; 1299 } 1300 #if __FreeBSD__ 1301 KASSERT(needed_space <= MHLEN, 1302 ("not enough room, need %u got %d\n", needed_space, MHLEN)); 1303 #elif __NetBSD__ 1304 KASSERT(needed_space <= MHLEN, 1305 ("not enough room, need %u got %lu\n", needed_space, (u_long)MHLEN)); 1306 #endif 1307 1308 /* 1309 * Setup new mbuf to have leading space to prepend the 1310 * 802.11 header and any crypto header bits that are 1311 * required (the latter are added when the driver calls 1312 * back to ieee80211_crypto_encap to do crypto encapsulation). 1313 */ 1314 /* NB: must be first 'cuz it clobbers m_data */ 1315 m_move_pkthdr(n, m); 1316 n->m_len = 0; /* NB: m_gethdr does not set */ 1317 n->m_data += needed_space; 1318 /* 1319 * Pull up Ethernet header to create the expected layout. 1320 * We could use m_pullup but that's overkill (i.e. we don't 1321 * need the actual data) and it cannot fail so do it inline 1322 * for speed. 1323 */ 1324 /* NB: struct ether_header is known to be contiguous */ 1325 n->m_len += sizeof(struct ether_header); 1326 m->m_len -= sizeof(struct ether_header); 1327 m->m_data += sizeof(struct ether_header); 1328 /* 1329 * Replace the head of the chain. 1330 */ 1331 n->m_next = m; 1332 m = n; 1333 } 1334 return m; 1335 #undef TO_BE_RECLAIMED 1336 } 1337 1338 /* 1339 * Return the transmit key to use in sending a unicast frame. 1340 * If a unicast key is set we use that. When no unicast key is set 1341 * we fall back to the default transmit key. 1342 */ 1343 static __inline struct ieee80211_key * 1344 ieee80211_crypto_getucastkey(struct ieee80211vap *vap, 1345 struct ieee80211_node *ni) 1346 { 1347 if (IEEE80211_KEY_UNDEFINED(&ni->ni_ucastkey)) { 1348 if (vap->iv_def_txkey == IEEE80211_KEYIX_NONE || 1349 IEEE80211_KEY_UNDEFINED(&vap->iv_nw_keys[vap->iv_def_txkey])) 1350 return NULL; 1351 return &vap->iv_nw_keys[vap->iv_def_txkey]; 1352 } else { 1353 return &ni->ni_ucastkey; 1354 } 1355 } 1356 1357 /* 1358 * Return the transmit key to use in sending a multicast frame. 1359 * Multicast traffic always uses the group key which is installed as 1360 * the default tx key. 1361 */ 1362 static __inline struct ieee80211_key * 1363 ieee80211_crypto_getmcastkey(struct ieee80211vap *vap, 1364 struct ieee80211_node *ni) 1365 { 1366 if (vap->iv_def_txkey == IEEE80211_KEYIX_NONE || 1367 IEEE80211_KEY_UNDEFINED(&vap->iv_nw_keys[vap->iv_def_txkey])) 1368 return NULL; 1369 return &vap->iv_nw_keys[vap->iv_def_txkey]; 1370 } 1371 1372 /* 1373 * Encapsulate an outbound data frame. The mbuf chain is updated. 1374 * If an error is encountered NULL is returned. The caller is required 1375 * to provide a node reference and pullup the ethernet header in the 1376 * first mbuf. 1377 * 1378 * NB: Packet is assumed to be processed by ieee80211_classify which 1379 * marked EAPOL frames w/ M_EAPOL. 1380 */ 1381 struct mbuf * 1382 ieee80211_encap(struct ieee80211vap *vap, struct ieee80211_node *ni, 1383 struct mbuf *m) 1384 { 1385 #define WH4(wh) ((struct ieee80211_frame_addr4 *)(wh)) 1386 #define MC01(mc) ((struct ieee80211_meshcntl_ae01 *)mc) 1387 struct ieee80211com *ic = ni->ni_ic; 1388 #ifdef IEEE80211_SUPPORT_MESH 1389 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1390 struct ieee80211_meshcntl_ae10 *mc; 1391 struct ieee80211_mesh_route *rt = NULL; 1392 int dir = -1; 1393 #endif 1394 struct ether_header eh; 1395 struct ieee80211_frame *wh; 1396 struct ieee80211_key *key; 1397 struct llc *llc; 1398 int hdrsize, hdrspace, datalen, addqos, txfrag, is4addr, is_mcast; 1399 ieee80211_seq seqno; 1400 int meshhdrsize, meshae; 1401 uint8_t *qos; 1402 int is_amsdu = 0; 1403 1404 IEEE80211_TX_LOCK_ASSERT(ic); 1405 1406 is_mcast = !! (m->m_flags & (M_MCAST | M_BCAST)); 1407 1408 /* 1409 * Copy existing Ethernet header to a safe place. The 1410 * rest of the code assumes it's ok to strip it when 1411 * reorganizing state for the final encapsulation. 1412 */ 1413 KASSERT(m->m_len >= sizeof(eh), ("no ethernet header!")); 1414 ETHER_HEADER_COPY(&eh, mtod(m, caddr_t)); 1415 1416 /* 1417 * Insure space for additional headers. First identify 1418 * transmit key to use in calculating any buffer adjustments 1419 * required. This is also used below to do privacy 1420 * encapsulation work. Then calculate the 802.11 header 1421 * size and any padding required by the driver. 1422 * 1423 * Note key may be NULL if we fall back to the default 1424 * transmit key and that is not set. In that case the 1425 * buffer may not be expanded as needed by the cipher 1426 * routines, but they will/should discard it. 1427 */ 1428 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 1429 if (vap->iv_opmode == IEEE80211_M_STA || 1430 !IEEE80211_IS_MULTICAST(eh.ether_dhost) || 1431 (vap->iv_opmode == IEEE80211_M_WDS && 1432 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY))) 1433 key = ieee80211_crypto_getucastkey(vap, ni); 1434 else 1435 key = ieee80211_crypto_getmcastkey(vap, ni); 1436 if (key == NULL && (m->m_flags & M_EAPOL) == 0) { 1437 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, 1438 eh.ether_dhost, 1439 "no default transmit key (%s) deftxkey %u", 1440 __func__, vap->iv_def_txkey); 1441 vap->iv_stats.is_tx_nodefkey++; 1442 goto bad; 1443 } 1444 } else 1445 key = NULL; 1446 /* 1447 * XXX Some ap's don't handle QoS-encapsulated EAPOL 1448 * frames so suppress use. This may be an issue if other 1449 * ap's require all data frames to be QoS-encapsulated 1450 * once negotiated in which case we'll need to make this 1451 * configurable. 1452 * 1453 * Don't send multicast QoS frames. 1454 * Technically multicast frames can be QoS if all stations in the 1455 * BSS are also QoS. 1456 * 1457 * NB: mesh data frames are QoS, including multicast frames. 1458 */ 1459 addqos = 1460 (((is_mcast == 0) && (ni->ni_flags & 1461 (IEEE80211_NODE_QOS|IEEE80211_NODE_HT))) || 1462 (vap->iv_opmode == IEEE80211_M_MBSS)) && 1463 (m->m_flags & M_EAPOL) == 0; 1464 1465 if (addqos) 1466 hdrsize = sizeof(struct ieee80211_qosframe); 1467 else 1468 hdrsize = sizeof(struct ieee80211_frame); 1469 #ifdef IEEE80211_SUPPORT_MESH 1470 if (vap->iv_opmode == IEEE80211_M_MBSS) { 1471 /* 1472 * Mesh data frames are encapsulated according to the 1473 * rules of Section 11B.8.5 (p.139 of D3.0 spec). 1474 * o Group Addressed data (aka multicast) originating 1475 * at the local sta are sent w/ 3-address format and 1476 * address extension mode 00 1477 * o Individually Addressed data (aka unicast) originating 1478 * at the local sta are sent w/ 4-address format and 1479 * address extension mode 00 1480 * o Group Addressed data forwarded from a non-mesh sta are 1481 * sent w/ 3-address format and address extension mode 01 1482 * o Individually Address data from another sta are sent 1483 * w/ 4-address format and address extension mode 10 1484 */ 1485 is4addr = 0; /* NB: don't use, disable */ 1486 if (!IEEE80211_IS_MULTICAST(eh.ether_dhost)) { 1487 rt = ieee80211_mesh_rt_find(vap, eh.ether_dhost); 1488 KASSERT(rt != NULL, ("route is NULL")); 1489 dir = IEEE80211_FC1_DIR_DSTODS; 1490 hdrsize += IEEE80211_ADDR_LEN; 1491 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { 1492 if (IEEE80211_ADDR_EQ(rt->rt_mesh_gate, 1493 vap->iv_myaddr)) { 1494 IEEE80211_NOTE_MAC(vap, 1495 IEEE80211_MSG_MESH, 1496 eh.ether_dhost, 1497 "%s", "trying to send to ourself"); 1498 goto bad; 1499 } 1500 meshae = IEEE80211_MESH_AE_10; 1501 meshhdrsize = 1502 sizeof(struct ieee80211_meshcntl_ae10); 1503 } else { 1504 meshae = IEEE80211_MESH_AE_00; 1505 meshhdrsize = 1506 sizeof(struct ieee80211_meshcntl); 1507 } 1508 } else { 1509 dir = IEEE80211_FC1_DIR_FROMDS; 1510 if (!IEEE80211_ADDR_EQ(eh.ether_shost, vap->iv_myaddr)) { 1511 /* proxy group */ 1512 meshae = IEEE80211_MESH_AE_01; 1513 meshhdrsize = 1514 sizeof(struct ieee80211_meshcntl_ae01); 1515 } else { 1516 /* group */ 1517 meshae = IEEE80211_MESH_AE_00; 1518 meshhdrsize = sizeof(struct ieee80211_meshcntl); 1519 } 1520 } 1521 } else { 1522 #endif 1523 /* 1524 * 4-address frames need to be generated for: 1525 * o packets sent through a WDS vap (IEEE80211_M_WDS) 1526 * o packets sent through a vap marked for relaying 1527 * (e.g. a station operating with dynamic WDS) 1528 */ 1529 is4addr = vap->iv_opmode == IEEE80211_M_WDS || 1530 ((vap->iv_flags_ext & IEEE80211_FEXT_4ADDR) && 1531 !IEEE80211_ADDR_EQ(eh.ether_shost, vap->iv_myaddr)); 1532 if (is4addr) 1533 hdrsize += IEEE80211_ADDR_LEN; 1534 meshhdrsize = meshae = 0; 1535 #ifdef IEEE80211_SUPPORT_MESH 1536 } 1537 #endif 1538 /* 1539 * Honor driver DATAPAD requirement. 1540 */ 1541 if (ic->ic_flags & IEEE80211_F_DATAPAD) 1542 hdrspace = roundup(hdrsize, sizeof(uint32_t)); 1543 else 1544 hdrspace = hdrsize; 1545 1546 if (__predict_true((m->m_flags & M_FF) == 0)) { 1547 /* 1548 * Normal frame. 1549 */ 1550 m = ieee80211_mbuf_adjust(vap, hdrspace + meshhdrsize, key, m); 1551 if (m == NULL) { 1552 /* NB: ieee80211_mbuf_adjust handles msgs+statistics */ 1553 goto bad; 1554 } 1555 /* NB: this could be optimized 'cuz of ieee80211_mbuf_adjust */ 1556 m_adj(m, sizeof(struct ether_header) - sizeof(struct llc)); 1557 llc = mtod(m, struct llc *); 1558 llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP; 1559 llc->llc_control = LLC_UI; 1560 llc->llc_snap.org_code[0] = 0; 1561 llc->llc_snap.org_code[1] = 0; 1562 llc->llc_snap.org_code[2] = 0; 1563 llc->llc_snap.ether_type = eh.ether_type; 1564 } else { 1565 #ifdef IEEE80211_SUPPORT_SUPERG 1566 /* 1567 * Aggregated frame. Check if it's for AMSDU or FF. 1568 * 1569 * XXX TODO: IEEE80211_NODE_AMSDU* isn't implemented 1570 * anywhere for some reason. But, since 11n requires 1571 * AMSDU RX, we can just assume "11n" == "AMSDU". 1572 */ 1573 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG, "%s: called; M_FF\n", __func__); 1574 if (ieee80211_amsdu_tx_ok(ni)) { 1575 m = ieee80211_amsdu_encap(vap, m, hdrspace + meshhdrsize, key); 1576 is_amsdu = 1; 1577 } else { 1578 m = ieee80211_ff_encap(vap, m, hdrspace + meshhdrsize, key); 1579 } 1580 if (m == NULL) 1581 #endif 1582 goto bad; 1583 } 1584 datalen = m->m_pkthdr.len; /* NB: w/o 802.11 header */ 1585 1586 M_PREPEND(m, hdrspace + meshhdrsize, M_NOWAIT); 1587 if (m == NULL) { 1588 vap->iv_stats.is_tx_nobuf++; 1589 goto bad; 1590 } 1591 wh = mtod(m, struct ieee80211_frame *); 1592 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_DATA; 1593 *(uint16_t *)wh->i_dur = 0; 1594 qos = NULL; /* NB: quiet compiler */ 1595 if (is4addr) { 1596 wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS; 1597 IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_macaddr); 1598 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); 1599 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_dhost); 1600 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, eh.ether_shost); 1601 } else switch (vap->iv_opmode) { 1602 case IEEE80211_M_STA: 1603 wh->i_fc[1] = IEEE80211_FC1_DIR_TODS; 1604 IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_bssid); 1605 IEEE80211_ADDR_COPY(wh->i_addr2, eh.ether_shost); 1606 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_dhost); 1607 break; 1608 case IEEE80211_M_IBSS: 1609 case IEEE80211_M_AHDEMO: 1610 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 1611 IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost); 1612 IEEE80211_ADDR_COPY(wh->i_addr2, eh.ether_shost); 1613 /* 1614 * NB: always use the bssid from iv_bss as the 1615 * neighbor's may be stale after an ibss merge 1616 */ 1617 IEEE80211_ADDR_COPY(wh->i_addr3, vap->iv_bss->ni_bssid); 1618 break; 1619 case IEEE80211_M_HOSTAP: 1620 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS; 1621 IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost); 1622 IEEE80211_ADDR_COPY(wh->i_addr2, ni->ni_bssid); 1623 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_shost); 1624 break; 1625 #ifdef IEEE80211_SUPPORT_MESH 1626 case IEEE80211_M_MBSS: 1627 /* NB: offset by hdrspace to deal with DATAPAD */ 1628 mc = (struct ieee80211_meshcntl_ae10 *) 1629 (mtod(m, uint8_t *) + hdrspace); 1630 wh->i_fc[1] = dir; 1631 switch (meshae) { 1632 case IEEE80211_MESH_AE_00: /* no proxy */ 1633 mc->mc_flags = 0; 1634 if (dir == IEEE80211_FC1_DIR_DSTODS) { /* ucast */ 1635 IEEE80211_ADDR_COPY(wh->i_addr1, 1636 ni->ni_macaddr); 1637 IEEE80211_ADDR_COPY(wh->i_addr2, 1638 vap->iv_myaddr); 1639 IEEE80211_ADDR_COPY(wh->i_addr3, 1640 eh.ether_dhost); 1641 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, 1642 eh.ether_shost); 1643 qos =((struct ieee80211_qosframe_addr4 *) 1644 wh)->i_qos; 1645 } else if (dir == IEEE80211_FC1_DIR_FROMDS) { 1646 /* mcast */ 1647 IEEE80211_ADDR_COPY(wh->i_addr1, 1648 eh.ether_dhost); 1649 IEEE80211_ADDR_COPY(wh->i_addr2, 1650 vap->iv_myaddr); 1651 IEEE80211_ADDR_COPY(wh->i_addr3, 1652 eh.ether_shost); 1653 qos = ((struct ieee80211_qosframe *) 1654 wh)->i_qos; 1655 } 1656 break; 1657 case IEEE80211_MESH_AE_01: /* mcast, proxy */ 1658 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS; 1659 IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost); 1660 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); 1661 IEEE80211_ADDR_COPY(wh->i_addr3, vap->iv_myaddr); 1662 mc->mc_flags = 1; 1663 IEEE80211_ADDR_COPY(MC01(mc)->mc_addr4, 1664 eh.ether_shost); 1665 qos = ((struct ieee80211_qosframe *) wh)->i_qos; 1666 break; 1667 case IEEE80211_MESH_AE_10: /* ucast, proxy */ 1668 KASSERT(rt != NULL, ("route is NULL")); 1669 IEEE80211_ADDR_COPY(wh->i_addr1, rt->rt_nexthop); 1670 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); 1671 IEEE80211_ADDR_COPY(wh->i_addr3, rt->rt_mesh_gate); 1672 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, vap->iv_myaddr); 1673 mc->mc_flags = IEEE80211_MESH_AE_10; 1674 IEEE80211_ADDR_COPY(mc->mc_addr5, eh.ether_dhost); 1675 IEEE80211_ADDR_COPY(mc->mc_addr6, eh.ether_shost); 1676 qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos; 1677 break; 1678 default: 1679 KASSERT(0, ("meshae %d", meshae)); 1680 break; 1681 } 1682 mc->mc_ttl = ms->ms_ttl; 1683 ms->ms_seq++; 1684 le32enc(mc->mc_seq, ms->ms_seq); 1685 break; 1686 #endif 1687 case IEEE80211_M_WDS: /* NB: is4addr should always be true */ 1688 default: 1689 goto bad; 1690 } 1691 if (m->m_flags & M_MORE_DATA) 1692 wh->i_fc[1] |= IEEE80211_FC1_MORE_DATA; 1693 if (addqos) { 1694 int ac, tid; 1695 1696 if (is4addr) { 1697 qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos; 1698 /* NB: mesh case handled earlier */ 1699 } else if (vap->iv_opmode != IEEE80211_M_MBSS) 1700 qos = ((struct ieee80211_qosframe *) wh)->i_qos; 1701 ac = M_WME_GETAC(m); 1702 /* map from access class/queue to 11e header priorty value */ 1703 tid = WME_AC_TO_TID(ac); 1704 qos[0] = tid & IEEE80211_QOS_TID; 1705 if (ic->ic_wme.wme_wmeChanParams.cap_wmeParams[ac].wmep_noackPolicy) 1706 qos[0] |= IEEE80211_QOS_ACKPOLICY_NOACK; 1707 #ifdef IEEE80211_SUPPORT_MESH 1708 if (vap->iv_opmode == IEEE80211_M_MBSS) 1709 qos[1] = IEEE80211_QOS_MC; 1710 else 1711 #endif 1712 qos[1] = 0; 1713 wh->i_fc[0] |= IEEE80211_FC0_SUBTYPE_QOS; 1714 1715 /* 1716 * If this is an A-MSDU then ensure we set the 1717 * relevant field. 1718 */ 1719 if (is_amsdu) 1720 qos[0] |= IEEE80211_QOS_AMSDU; 1721 1722 /* 1723 * XXX TODO TX lock is needed for atomic updates of sequence 1724 * numbers. If the driver does it, then don't do it here; 1725 * and we don't need the TX lock held. 1726 */ 1727 if ((m->m_flags & M_AMPDU_MPDU) == 0) { 1728 /* 1729 * 802.11-2012 9.3.2.10 - 1730 * 1731 * If this is a multicast frame then we need 1732 * to ensure that the sequence number comes from 1733 * a separate seqno space and not the TID space. 1734 * 1735 * Otherwise multicast frames may actually cause 1736 * holes in the TX blockack window space and 1737 * upset various things. 1738 */ 1739 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) 1740 seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]++; 1741 else 1742 seqno = ni->ni_txseqs[tid]++; 1743 1744 /* 1745 * NB: don't assign a sequence # to potential 1746 * aggregates; we expect this happens at the 1747 * point the frame comes off any aggregation q 1748 * as otherwise we may introduce holes in the 1749 * BA sequence space and/or make window accouting 1750 * more difficult. 1751 * 1752 * XXX may want to control this with a driver 1753 * capability; this may also change when we pull 1754 * aggregation up into net80211 1755 */ 1756 seqno = ni->ni_txseqs[tid]++; 1757 *(uint16_t *)wh->i_seq = 1758 htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); 1759 M_SEQNO_SET(m, seqno); 1760 } else { 1761 /* NB: zero out i_seq field (for s/w encryption etc) */ 1762 *(uint16_t *)wh->i_seq = 0; 1763 } 1764 } else { 1765 /* 1766 * XXX TODO TX lock is needed for atomic updates of sequence 1767 * numbers. If the driver does it, then don't do it here; 1768 * and we don't need the TX lock held. 1769 */ 1770 seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]++; 1771 *(uint16_t *)wh->i_seq = 1772 htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); 1773 M_SEQNO_SET(m, seqno); 1774 1775 /* 1776 * XXX TODO: we shouldn't allow EAPOL, etc that would 1777 * be forced to be non-QoS traffic to be A-MSDU encapsulated. 1778 */ 1779 if (is_amsdu) 1780 printf("%s: XXX ERROR: is_amsdu set; not QoS!\n", 1781 __func__); 1782 } 1783 1784 /* 1785 * Check if xmit fragmentation is required. 1786 * 1787 * If the hardware does fragmentation offload, then don't bother 1788 * doing it here. 1789 */ 1790 if (IEEE80211_CONF_FRAG_OFFLOAD(ic)) 1791 txfrag = 0; 1792 else 1793 txfrag = (m->m_pkthdr.len > vap->iv_fragthreshold && 1794 !IEEE80211_IS_MULTICAST(wh->i_addr1) && 1795 (vap->iv_caps & IEEE80211_C_TXFRAG) && 1796 (m->m_flags & (M_FF | M_AMPDU_MPDU)) == 0); 1797 1798 if (key != NULL) { 1799 /* 1800 * IEEE 802.1X: send EAPOL frames always in the clear. 1801 * WPA/WPA2: encrypt EAPOL keys when pairwise keys are set. 1802 */ 1803 if ((m->m_flags & M_EAPOL) == 0 || 1804 ((vap->iv_flags & IEEE80211_F_WPA) && 1805 (vap->iv_opmode == IEEE80211_M_STA ? 1806 !IEEE80211_KEY_UNDEFINED(key) : 1807 !IEEE80211_KEY_UNDEFINED(&ni->ni_ucastkey)))) { 1808 wh->i_fc[1] |= IEEE80211_FC1_PROTECTED; 1809 if (!ieee80211_crypto_enmic(vap, key, m, txfrag)) { 1810 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, 1811 eh.ether_dhost, 1812 "%s", "enmic failed, discard frame"); 1813 vap->iv_stats.is_crypto_enmicfail++; 1814 goto bad; 1815 } 1816 } 1817 } 1818 if (txfrag && !ieee80211_fragment(vap, m, hdrsize, 1819 key != NULL ? key->wk_cipher->ic_header : 0, vap->iv_fragthreshold)) 1820 goto bad; 1821 1822 m->m_flags |= M_ENCAP; /* mark encapsulated */ 1823 1824 IEEE80211_NODE_STAT(ni, tx_data); 1825 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1826 IEEE80211_NODE_STAT(ni, tx_mcast); 1827 m->m_flags |= M_MCAST; 1828 } else 1829 IEEE80211_NODE_STAT(ni, tx_ucast); 1830 IEEE80211_NODE_STAT_ADD(ni, tx_bytes, datalen); 1831 1832 return m; 1833 bad: 1834 if (m != NULL) 1835 m_freem(m); 1836 return NULL; 1837 #undef WH4 1838 #undef MC01 1839 } 1840 1841 void 1842 ieee80211_free_mbuf(struct mbuf *m) 1843 { 1844 struct mbuf *next; 1845 1846 if (m == NULL) 1847 return; 1848 1849 do { 1850 next = m->m_nextpkt; 1851 m->m_nextpkt = NULL; 1852 m_freem(m); 1853 } while ((m = next) != NULL); 1854 } 1855 1856 /* 1857 * Fragment the frame according to the specified mtu. 1858 * The size of the 802.11 header (w/o padding) is provided 1859 * so we don't need to recalculate it. We create a new 1860 * mbuf for each fragment and chain it through m_nextpkt; 1861 * we might be able to optimize this by reusing the original 1862 * packet's mbufs but that is significantly more complicated. 1863 */ 1864 static int 1865 ieee80211_fragment(struct ieee80211vap *vap, struct mbuf *m0, 1866 u_int hdrsize, u_int ciphdrsize, u_int mtu) 1867 { 1868 struct ieee80211com *ic = vap->iv_ic; 1869 struct ieee80211_frame *wh, *whf; 1870 struct mbuf *m, *prev; 1871 u_int totalhdrsize, fragno, fragsize, off, remainder, payload; 1872 u_int hdrspace; 1873 1874 KASSERT(m0->m_nextpkt == NULL, ("mbuf already chained?")); 1875 KASSERT(m0->m_pkthdr.len > mtu, 1876 ("pktlen %u mtu %u", m0->m_pkthdr.len, mtu)); 1877 1878 /* 1879 * Honor driver DATAPAD requirement. 1880 */ 1881 if (ic->ic_flags & IEEE80211_F_DATAPAD) 1882 hdrspace = roundup(hdrsize, sizeof(uint32_t)); 1883 else 1884 hdrspace = hdrsize; 1885 1886 wh = mtod(m0, struct ieee80211_frame *); 1887 /* NB: mark the first frag; it will be propagated below */ 1888 wh->i_fc[1] |= IEEE80211_FC1_MORE_FRAG; 1889 totalhdrsize = hdrspace + ciphdrsize; 1890 fragno = 1; 1891 off = mtu - ciphdrsize; 1892 remainder = m0->m_pkthdr.len - off; 1893 prev = m0; 1894 do { 1895 fragsize = MIN(totalhdrsize + remainder, mtu); 1896 #if __FreeBSD__ 1897 m = m_get2(fragsize, M_NOWAIT, MT_DATA, M_PKTHDR); 1898 #elif __NetBSD__ 1899 m = m_get(M_NOWAIT, MT_DATA); 1900 #endif 1901 if (m == NULL) 1902 goto bad; 1903 /* leave room to prepend any cipher header */ 1904 m_align(m, fragsize - ciphdrsize); 1905 1906 /* 1907 * Form the header in the fragment. Note that since 1908 * we mark the first fragment with the MORE_FRAG bit 1909 * it automatically is propagated to each fragment; we 1910 * need only clear it on the last fragment (done below). 1911 * NB: frag 1+ dont have Mesh Control field present. 1912 */ 1913 whf = mtod(m, struct ieee80211_frame *); 1914 memcpy(whf, wh, hdrsize); 1915 #ifdef IEEE80211_SUPPORT_MESH 1916 if (vap->iv_opmode == IEEE80211_M_MBSS) { 1917 if (IEEE80211_IS_DSTODS(wh)) 1918 ((struct ieee80211_qosframe_addr4 *) 1919 whf)->i_qos[1] &= ~IEEE80211_QOS_MC; 1920 else 1921 ((struct ieee80211_qosframe *) 1922 whf)->i_qos[1] &= ~IEEE80211_QOS_MC; 1923 } 1924 #endif 1925 *(uint16_t *)&whf->i_seq[0] |= htole16( 1926 (fragno & IEEE80211_SEQ_FRAG_MASK) << 1927 IEEE80211_SEQ_FRAG_SHIFT); 1928 fragno++; 1929 1930 payload = fragsize - totalhdrsize; 1931 /* NB: destination is known to be contiguous */ 1932 1933 m_copydata(m0, off, payload, mtod(m, uint8_t *) + hdrspace); 1934 m->m_len = hdrspace + payload; 1935 m->m_pkthdr.len = hdrspace + payload; 1936 m->m_flags |= M_FRAG; 1937 1938 /* chain up the fragment */ 1939 prev->m_nextpkt = m; 1940 prev = m; 1941 1942 /* deduct fragment just formed */ 1943 remainder -= payload; 1944 off += payload; 1945 } while (remainder != 0); 1946 1947 /* set the last fragment */ 1948 m->m_flags |= M_LASTFRAG; 1949 whf->i_fc[1] &= ~IEEE80211_FC1_MORE_FRAG; 1950 1951 /* strip first mbuf now that everything has been copied */ 1952 m_adj(m0, -(m0->m_pkthdr.len - (mtu - ciphdrsize))); 1953 m0->m_flags |= M_FIRSTFRAG | M_FRAG; 1954 1955 vap->iv_stats.is_tx_fragframes++; 1956 vap->iv_stats.is_tx_frags += fragno-1; 1957 1958 return 1; 1959 bad: 1960 /* reclaim fragments but leave original frame for caller to free */ 1961 ieee80211_free_mbuf(m0->m_nextpkt); 1962 m0->m_nextpkt = NULL; 1963 return 0; 1964 } 1965 1966 /* 1967 * Add a supported rates element id to a frame. 1968 */ 1969 uint8_t * 1970 ieee80211_add_rates(uint8_t *frm, const struct ieee80211_rateset *rs) 1971 { 1972 int nrates; 1973 1974 *frm++ = IEEE80211_ELEMID_RATES; 1975 nrates = rs->rs_nrates; 1976 if (nrates > IEEE80211_RATE_SIZE) 1977 nrates = IEEE80211_RATE_SIZE; 1978 *frm++ = nrates; 1979 memcpy(frm, rs->rs_rates, nrates); 1980 return frm + nrates; 1981 } 1982 1983 /* 1984 * Add an extended supported rates element id to a frame. 1985 */ 1986 uint8_t * 1987 ieee80211_add_xrates(uint8_t *frm, const struct ieee80211_rateset *rs) 1988 { 1989 /* 1990 * Add an extended supported rates element if operating in 11g mode. 1991 */ 1992 if (rs->rs_nrates > IEEE80211_RATE_SIZE) { 1993 int nrates = rs->rs_nrates - IEEE80211_RATE_SIZE; 1994 *frm++ = IEEE80211_ELEMID_XRATES; 1995 *frm++ = nrates; 1996 memcpy(frm, rs->rs_rates + IEEE80211_RATE_SIZE, nrates); 1997 frm += nrates; 1998 } 1999 return frm; 2000 } 2001 2002 /* 2003 * Add an ssid element to a frame. 2004 */ 2005 uint8_t * 2006 ieee80211_add_ssid(uint8_t *frm, const uint8_t *ssid, u_int len) 2007 { 2008 *frm++ = IEEE80211_ELEMID_SSID; 2009 *frm++ = len; 2010 memcpy(frm, ssid, len); 2011 return frm + len; 2012 } 2013 2014 /* 2015 * Add an erp element to a frame. 2016 */ 2017 static uint8_t * 2018 ieee80211_add_erp(uint8_t *frm, struct ieee80211com *ic) 2019 { 2020 uint8_t erp; 2021 2022 *frm++ = IEEE80211_ELEMID_ERP; 2023 *frm++ = 1; 2024 erp = 0; 2025 if (ic->ic_nonerpsta != 0) 2026 erp |= IEEE80211_ERP_NON_ERP_PRESENT; 2027 if (ic->ic_flags & IEEE80211_F_USEPROT) 2028 erp |= IEEE80211_ERP_USE_PROTECTION; 2029 if (ic->ic_flags & IEEE80211_F_USEBARKER) 2030 erp |= IEEE80211_ERP_LONG_PREAMBLE; 2031 *frm++ = erp; 2032 return frm; 2033 } 2034 2035 /* 2036 * Add a CFParams element to a frame. 2037 */ 2038 static uint8_t * 2039 ieee80211_add_cfparms(uint8_t *frm, struct ieee80211com *ic) 2040 { 2041 #define ADDSHORT(frm, v) do { \ 2042 le16enc(frm, v); \ 2043 frm += 2; \ 2044 } while (0) 2045 *frm++ = IEEE80211_ELEMID_CFPARMS; 2046 *frm++ = 6; 2047 *frm++ = 0; /* CFP count */ 2048 *frm++ = 2; /* CFP period */ 2049 ADDSHORT(frm, 0); /* CFP MaxDuration (TU) */ 2050 ADDSHORT(frm, 0); /* CFP CurRemaining (TU) */ 2051 return frm; 2052 #undef ADDSHORT 2053 } 2054 2055 static __inline uint8_t * 2056 add_appie(uint8_t *frm, const struct ieee80211_appie *ie) 2057 { 2058 memcpy(frm, ie->ie_data, ie->ie_len); 2059 return frm + ie->ie_len; 2060 } 2061 2062 static __inline uint8_t * 2063 add_ie(uint8_t *frm, const uint8_t *ie) 2064 { 2065 memcpy(frm, ie, 2 + ie[1]); 2066 return frm + 2 + ie[1]; 2067 } 2068 2069 #define WME_OUI_BYTES 0x00, 0x50, 0xf2 2070 /* 2071 * Add a WME information element to a frame. 2072 */ 2073 uint8_t * 2074 ieee80211_add_wme_info(uint8_t *frm, struct ieee80211_wme_state *wme) 2075 { 2076 static const struct ieee80211_wme_info info = { 2077 .wme_id = IEEE80211_ELEMID_VENDOR, 2078 .wme_len = sizeof(struct ieee80211_wme_info) - 2, 2079 .wme_oui = { WME_OUI_BYTES }, 2080 .wme_type = WME_OUI_TYPE, 2081 .wme_subtype = WME_INFO_OUI_SUBTYPE, 2082 .wme_version = WME_VERSION, 2083 .wme_info = 0, 2084 }; 2085 memcpy(frm, &info, sizeof(info)); 2086 return frm + sizeof(info); 2087 } 2088 2089 /* 2090 * Add a WME parameters element to a frame. 2091 */ 2092 static uint8_t * 2093 ieee80211_add_wme_param(uint8_t *frm, struct ieee80211_wme_state *wme) 2094 { 2095 #define SM(_v, _f) (((_v) << _f##_S) & _f) 2096 #define ADDSHORT(frm, v) do { \ 2097 le16enc(frm, v); \ 2098 frm += 2; \ 2099 } while (0) 2100 /* NB: this works 'cuz a param has an info at the front */ 2101 static const struct ieee80211_wme_info param = { 2102 .wme_id = IEEE80211_ELEMID_VENDOR, 2103 .wme_len = sizeof(struct ieee80211_wme_param) - 2, 2104 .wme_oui = { WME_OUI_BYTES }, 2105 .wme_type = WME_OUI_TYPE, 2106 .wme_subtype = WME_PARAM_OUI_SUBTYPE, 2107 .wme_version = WME_VERSION, 2108 }; 2109 int i; 2110 2111 memcpy(frm, ¶m, sizeof(param)); 2112 frm += __offsetof(struct ieee80211_wme_info, wme_info); 2113 *frm++ = wme->wme_bssChanParams.cap_info; /* AC info */ 2114 *frm++ = 0; /* reserved field */ 2115 for (i = 0; i < WME_NUM_AC; i++) { 2116 const struct wmeParams *ac = 2117 &wme->wme_bssChanParams.cap_wmeParams[i]; 2118 *frm++ = SM(i, WME_PARAM_ACI) 2119 | SM(ac->wmep_acm, WME_PARAM_ACM) 2120 | SM(ac->wmep_aifsn, WME_PARAM_AIFSN) 2121 ; 2122 *frm++ = SM(ac->wmep_logcwmax, WME_PARAM_LOGCWMAX) 2123 | SM(ac->wmep_logcwmin, WME_PARAM_LOGCWMIN) 2124 ; 2125 ADDSHORT(frm, ac->wmep_txopLimit); 2126 } 2127 return frm; 2128 #undef SM 2129 #undef ADDSHORT 2130 } 2131 #undef WME_OUI_BYTES 2132 2133 /* 2134 * Add an 11h Power Constraint element to a frame. 2135 */ 2136 static uint8_t * 2137 ieee80211_add_powerconstraint(uint8_t *frm, struct ieee80211vap *vap) 2138 { 2139 const struct ieee80211_channel *c = vap->iv_bss->ni_chan; 2140 /* XXX per-vap tx power limit? */ 2141 int8_t limit = vap->iv_ic->ic_txpowlimit / 2; 2142 2143 frm[0] = IEEE80211_ELEMID_PWRCNSTR; 2144 frm[1] = 1; 2145 frm[2] = c->ic_maxregpower > limit ? c->ic_maxregpower - limit : 0; 2146 return frm + 3; 2147 } 2148 2149 /* 2150 * Add an 11h Power Capability element to a frame. 2151 */ 2152 static uint8_t * 2153 ieee80211_add_powercapability(uint8_t *frm, const struct ieee80211_channel *c) 2154 { 2155 frm[0] = IEEE80211_ELEMID_PWRCAP; 2156 frm[1] = 2; 2157 frm[2] = c->ic_minpower; 2158 frm[3] = c->ic_maxpower; 2159 return frm + 4; 2160 } 2161 2162 /* 2163 * Add an 11h Supported Channels element to a frame. 2164 */ 2165 static uint8_t * 2166 ieee80211_add_supportedchannels(uint8_t *frm, struct ieee80211com *ic) 2167 { 2168 static const int ielen = 26; 2169 2170 frm[0] = IEEE80211_ELEMID_SUPPCHAN; 2171 frm[1] = ielen; 2172 /* XXX not correct */ 2173 memcpy(frm+2, ic->ic_chan_avail, ielen); 2174 return frm + 2 + ielen; 2175 } 2176 2177 /* 2178 * Add an 11h Quiet time element to a frame. 2179 */ 2180 static uint8_t * 2181 ieee80211_add_quiet(uint8_t *frm, struct ieee80211vap *vap, int update) 2182 { 2183 struct ieee80211_quiet_ie *quiet = (struct ieee80211_quiet_ie *) frm; 2184 2185 quiet->quiet_ie = IEEE80211_ELEMID_QUIET; 2186 quiet->len = 6; 2187 2188 /* 2189 * Only update every beacon interval - otherwise probe responses 2190 * would update the quiet count value. 2191 */ 2192 if (update) { 2193 if (vap->iv_quiet_count_value == 1) 2194 vap->iv_quiet_count_value = vap->iv_quiet_count; 2195 else if (vap->iv_quiet_count_value > 1) 2196 vap->iv_quiet_count_value--; 2197 } 2198 2199 if (vap->iv_quiet_count_value == 0) { 2200 /* value 0 is reserved as per 802.11h standerd */ 2201 vap->iv_quiet_count_value = 1; 2202 } 2203 2204 quiet->tbttcount = vap->iv_quiet_count_value; 2205 quiet->period = vap->iv_quiet_period; 2206 quiet->duration = htole16(vap->iv_quiet_duration); 2207 quiet->offset = htole16(vap->iv_quiet_offset); 2208 return frm + sizeof(*quiet); 2209 } 2210 2211 /* 2212 * Add an 11h Channel Switch Announcement element to a frame. 2213 * Note that we use the per-vap CSA count to adjust the global 2214 * counter so we can use this routine to form probe response 2215 * frames and get the current count. 2216 */ 2217 static uint8_t * 2218 ieee80211_add_csa(uint8_t *frm, struct ieee80211vap *vap) 2219 { 2220 struct ieee80211com *ic = vap->iv_ic; 2221 struct ieee80211_csa_ie *csa = (struct ieee80211_csa_ie *) frm; 2222 2223 csa->csa_ie = IEEE80211_ELEMID_CSA; 2224 csa->csa_len = 3; 2225 csa->csa_mode = 1; /* XXX force quiet on channel */ 2226 csa->csa_newchan = ieee80211_chan2ieee(ic, ic->ic_csa_newchan); 2227 csa->csa_count = ic->ic_csa_count - vap->iv_csa_count; 2228 return frm + sizeof(*csa); 2229 } 2230 2231 /* 2232 * Add an 11h country information element to a frame. 2233 */ 2234 static uint8_t * 2235 ieee80211_add_countryie(uint8_t *frm, struct ieee80211com *ic) 2236 { 2237 2238 if (ic->ic_countryie == NULL || 2239 ic->ic_countryie_chan != ic->ic_bsschan) { 2240 /* 2241 * Handle lazy construction of ie. This is done on 2242 * first use and after a channel change that requires 2243 * re-calculation. 2244 */ 2245 if (ic->ic_countryie != NULL) 2246 IEEE80211_FREE(ic->ic_countryie, M_80211_NODE_IE); 2247 ic->ic_countryie = ieee80211_alloc_countryie(ic); 2248 if (ic->ic_countryie == NULL) 2249 return frm; 2250 ic->ic_countryie_chan = ic->ic_bsschan; 2251 } 2252 return add_appie(frm, ic->ic_countryie); 2253 } 2254 2255 uint8_t * 2256 ieee80211_add_wpa(uint8_t *frm, const struct ieee80211vap *vap) 2257 { 2258 if (vap->iv_flags & IEEE80211_F_WPA1 && vap->iv_wpa_ie != NULL) 2259 return (add_ie(frm, vap->iv_wpa_ie)); 2260 else { 2261 /* XXX else complain? */ 2262 return (frm); 2263 } 2264 } 2265 2266 uint8_t * 2267 ieee80211_add_rsn(uint8_t *frm, const struct ieee80211vap *vap) 2268 { 2269 if (vap->iv_flags & IEEE80211_F_WPA2 && vap->iv_rsn_ie != NULL) 2270 return (add_ie(frm, vap->iv_rsn_ie)); 2271 else { 2272 /* XXX else complain? */ 2273 return (frm); 2274 } 2275 } 2276 2277 uint8_t * 2278 ieee80211_add_qos(uint8_t *frm, const struct ieee80211_node *ni) 2279 { 2280 if (ni->ni_flags & IEEE80211_NODE_QOS) { 2281 *frm++ = IEEE80211_ELEMID_QOS; 2282 *frm++ = 1; 2283 *frm++ = 0; 2284 } 2285 2286 return (frm); 2287 } 2288 2289 /* 2290 * Send a probe request frame with the specified ssid 2291 * and any optional information element data. 2292 */ 2293 int 2294 ieee80211_send_probereq(struct ieee80211_node *ni, 2295 const uint8_t sa[IEEE80211_ADDR_LEN], 2296 const uint8_t da[IEEE80211_ADDR_LEN], 2297 const uint8_t bssid[IEEE80211_ADDR_LEN], 2298 const uint8_t *ssid, size_t ssidlen) 2299 { 2300 struct ieee80211vap *vap = ni->ni_vap; 2301 struct ieee80211com *ic = ni->ni_ic; 2302 struct ieee80211_node *bss; 2303 const struct ieee80211_txparam *tp; 2304 struct ieee80211_bpf_params params; 2305 const struct ieee80211_rateset *rs; 2306 struct mbuf *m; 2307 uint8_t *frm; 2308 int ret; 2309 2310 bss = ieee80211_ref_node(vap->iv_bss); 2311 2312 if (vap->iv_state == IEEE80211_S_CAC) { 2313 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni, 2314 "block %s frame in CAC state", "probe request"); 2315 vap->iv_stats.is_tx_badstate++; 2316 ieee80211_free_node(bss); 2317 return EIO; /* XXX */ 2318 } 2319 2320 /* 2321 * Hold a reference on the node so it doesn't go away until after 2322 * the xmit is complete all the way in the driver. On error we 2323 * will remove our reference. 2324 */ 2325 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2326 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", 2327 __func__, __LINE__, 2328 ni, ether_sprintf(ni->ni_macaddr), 2329 ieee80211_node_refcnt(ni)+1); 2330 ieee80211_ref_node(ni); 2331 2332 /* 2333 * prreq frame format 2334 * [tlv] ssid 2335 * [tlv] supported rates 2336 * [tlv] RSN (optional) 2337 * [tlv] extended supported rates 2338 * [tlv] HT cap (optional) 2339 * [tlv] VHT cap (optional) 2340 * [tlv] WPA (optional) 2341 * [tlv] user-specified ie's 2342 */ 2343 m = ieee80211_getmgtframe(&frm, 2344 ic->ic_headroom + sizeof(struct ieee80211_frame), 2345 2 + IEEE80211_NWID_LEN 2346 + 2 + IEEE80211_RATE_SIZE 2347 + sizeof(struct ieee80211_ie_htcap) 2348 + sizeof(struct ieee80211_ie_vhtcap) 2349 + sizeof(struct ieee80211_ie_htinfo) /* XXX not needed? */ 2350 + sizeof(struct ieee80211_ie_wpa) 2351 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2352 + sizeof(struct ieee80211_ie_wpa) 2353 + (vap->iv_appie_probereq != NULL ? 2354 vap->iv_appie_probereq->ie_len : 0) 2355 ); 2356 if (m == NULL) { 2357 vap->iv_stats.is_tx_nobuf++; 2358 ieee80211_free_node(ni); 2359 ieee80211_free_node(bss); 2360 return ENOMEM; 2361 } 2362 2363 frm = ieee80211_add_ssid(frm, ssid, ssidlen); 2364 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2365 frm = ieee80211_add_rates(frm, rs); 2366 frm = ieee80211_add_rsn(frm, vap); 2367 frm = ieee80211_add_xrates(frm, rs); 2368 2369 /* 2370 * Note: we can't use bss; we don't have one yet. 2371 * 2372 * So, we should announce our capabilities 2373 * in this channel mode (2g/5g), not the 2374 * channel details itself. 2375 */ 2376 if ((vap->iv_opmode == IEEE80211_M_IBSS) && 2377 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 2378 struct ieee80211_channel *c; 2379 2380 /* 2381 * Get the HT channel that we should try upgrading to. 2382 * If we can do 40MHz then this'll upgrade it appropriately. 2383 */ 2384 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, 2385 vap->iv_flags_ht); 2386 frm = ieee80211_add_htcap_ch(frm, vap, c); 2387 } 2388 2389 /* 2390 * XXX TODO: need to figure out what/how to update the 2391 * VHT channel. 2392 */ 2393 #if 0 2394 (vap->iv_flags_vht & IEEE80211_FVHT_VHT) { 2395 struct ieee80211_channel *c; 2396 2397 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, 2398 vap->iv_flags_ht); 2399 c = ieee80211_vht_adjust_channel(ic, c, vap->iv_flags_vht); 2400 frm = ieee80211_add_vhtcap_ch(frm, vap, c); 2401 } 2402 #endif 2403 2404 frm = ieee80211_add_wpa(frm, vap); 2405 if (vap->iv_appie_probereq != NULL) 2406 frm = add_appie(frm, vap->iv_appie_probereq); 2407 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2408 2409 KASSERT(M_LEADINGSPACE(m) >= sizeof(struct ieee80211_frame), 2410 ("leading space %zd", M_LEADINGSPACE(m))); 2411 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); 2412 if (m == NULL) { 2413 /* NB: cannot happen */ 2414 ieee80211_free_node(ni); 2415 ieee80211_free_node(bss); 2416 return ENOMEM; 2417 } 2418 2419 IEEE80211_TX_LOCK(ic); 2420 ieee80211_send_setup(ni, m, 2421 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ, 2422 IEEE80211_NONQOS_TID, sa, da, bssid); 2423 /* XXX power management? */ 2424 m->m_flags |= M_ENCAP; /* mark encapsulated */ 2425 2426 M_WME_SETAC(m, WME_AC_BE); 2427 2428 IEEE80211_NODE_STAT(ni, tx_probereq); 2429 IEEE80211_NODE_STAT(ni, tx_mgmt); 2430 2431 IEEE80211_DPRINTF(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS, 2432 "send probe req on channel %u bssid %s sa %6D da %6D ssid \"%.*s\"\n", 2433 ieee80211_chan2ieee(ic, ic->ic_curchan), 2434 ether_sprintf(bssid), 2435 sa, ":", 2436 da, ":", 2437 ssidlen, ssid); 2438 2439 memset(¶ms, 0, sizeof(params)); 2440 params.ibp_pri = M_WME_GETAC(m); 2441 tp = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)]; 2442 params.ibp_rate0 = tp->mgmtrate; 2443 if (IEEE80211_IS_MULTICAST(da)) { 2444 params.ibp_flags |= IEEE80211_BPF_NOACK; 2445 params.ibp_try0 = 1; 2446 } else 2447 params.ibp_try0 = tp->maxretry; 2448 params.ibp_power = ni->ni_txpower; 2449 ret = ieee80211_raw_output(vap, ni, m, ¶ms); 2450 IEEE80211_TX_UNLOCK(ic); 2451 ieee80211_free_node(bss); 2452 return (ret); 2453 } 2454 2455 /* 2456 * Calculate capability information for mgt frames. 2457 */ 2458 uint16_t 2459 ieee80211_getcapinfo(struct ieee80211vap *vap, struct ieee80211_channel *chan) 2460 { 2461 struct ieee80211com *ic = vap->iv_ic; 2462 uint16_t capinfo; 2463 2464 KASSERT(vap->iv_opmode != IEEE80211_M_STA, ("station mode")); 2465 2466 if (vap->iv_opmode == IEEE80211_M_HOSTAP) 2467 capinfo = IEEE80211_CAPINFO_ESS; 2468 else if (vap->iv_opmode == IEEE80211_M_IBSS) 2469 capinfo = IEEE80211_CAPINFO_IBSS; 2470 else 2471 capinfo = 0; 2472 if (vap->iv_flags & IEEE80211_F_PRIVACY) 2473 capinfo |= IEEE80211_CAPINFO_PRIVACY; 2474 if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && 2475 IEEE80211_IS_CHAN_2GHZ(chan)) 2476 capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE; 2477 if (ic->ic_flags & IEEE80211_F_SHSLOT) 2478 capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME; 2479 if (IEEE80211_IS_CHAN_5GHZ(chan) && (vap->iv_flags & IEEE80211_F_DOTH)) 2480 capinfo |= IEEE80211_CAPINFO_SPECTRUM_MGMT; 2481 return capinfo; 2482 } 2483 2484 /* 2485 * Send a management frame. The node is for the destination (or ic_bss 2486 * when in station mode). Nodes other than ic_bss have their reference 2487 * count bumped to reflect our use for an indeterminant time. 2488 */ 2489 int 2490 ieee80211_send_mgmt(struct ieee80211_node *ni, int type, int arg) 2491 { 2492 #define HTFLAGS (IEEE80211_NODE_HT | IEEE80211_NODE_HTCOMPAT) 2493 #define senderr(_x, _v) do { vap->iv_stats._v++; ret = _x; goto bad; } while (0) 2494 struct ieee80211vap *vap = ni->ni_vap; 2495 struct ieee80211com *ic = ni->ni_ic; 2496 struct ieee80211_node *bss = vap->iv_bss; 2497 struct ieee80211_bpf_params params; 2498 struct mbuf *m; 2499 uint8_t *frm; 2500 uint16_t capinfo; 2501 int has_challenge, is_shared_key, ret, status; 2502 2503 KASSERT(ni != NULL, ("null node")); 2504 2505 /* 2506 * Hold a reference on the node so it doesn't go away until after 2507 * the xmit is complete all the way in the driver. On error we 2508 * will remove our reference. 2509 */ 2510 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2511 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", 2512 __func__, __LINE__, 2513 ni, ether_sprintf(ni->ni_macaddr), 2514 ieee80211_node_refcnt(ni)+1); 2515 ieee80211_ref_node(ni); 2516 2517 memset(¶ms, 0, sizeof(params)); 2518 switch (type) { 2519 2520 case IEEE80211_FC0_SUBTYPE_AUTH: 2521 status = arg >> 16; 2522 arg &= 0xffff; 2523 has_challenge = ((arg == IEEE80211_AUTH_SHARED_CHALLENGE || 2524 arg == IEEE80211_AUTH_SHARED_RESPONSE) && 2525 ni->ni_challenge != NULL); 2526 2527 /* 2528 * Deduce whether we're doing open authentication or 2529 * shared key authentication. We do the latter if 2530 * we're in the middle of a shared key authentication 2531 * handshake or if we're initiating an authentication 2532 * request and configured to use shared key. 2533 */ 2534 is_shared_key = has_challenge || 2535 arg >= IEEE80211_AUTH_SHARED_RESPONSE || 2536 (arg == IEEE80211_AUTH_SHARED_REQUEST && 2537 bss->ni_authmode == IEEE80211_AUTH_SHARED); 2538 2539 m = ieee80211_getmgtframe(&frm, 2540 ic->ic_headroom + sizeof(struct ieee80211_frame), 2541 3 * sizeof(uint16_t) 2542 + (has_challenge && status == IEEE80211_STATUS_SUCCESS ? 2543 sizeof(uint16_t)+IEEE80211_CHALLENGE_LEN : 0) 2544 ); 2545 if (m == NULL) 2546 senderr(ENOMEM, is_tx_nobuf); 2547 2548 ((uint16_t *)frm)[0] = 2549 (is_shared_key) ? htole16(IEEE80211_AUTH_ALG_SHARED) 2550 : htole16(IEEE80211_AUTH_ALG_OPEN); 2551 ((uint16_t *)frm)[1] = htole16(arg); /* sequence number */ 2552 ((uint16_t *)frm)[2] = htole16(status);/* status */ 2553 2554 if (has_challenge && status == IEEE80211_STATUS_SUCCESS) { 2555 ((uint16_t *)frm)[3] = 2556 htole16((IEEE80211_CHALLENGE_LEN << 8) | 2557 IEEE80211_ELEMID_CHALLENGE); 2558 memcpy(&((uint16_t *)frm)[4], ni->ni_challenge, 2559 IEEE80211_CHALLENGE_LEN); 2560 m->m_pkthdr.len = m->m_len = 2561 4 * sizeof(uint16_t) + IEEE80211_CHALLENGE_LEN; 2562 if (arg == IEEE80211_AUTH_SHARED_RESPONSE) { 2563 IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni, 2564 "request encrypt frame (%s)", __func__); 2565 /* mark frame for encryption */ 2566 params.ibp_flags |= IEEE80211_BPF_CRYPTO; 2567 } 2568 } else 2569 m->m_pkthdr.len = m->m_len = 3 * sizeof(uint16_t); 2570 2571 /* XXX not right for shared key */ 2572 if (status == IEEE80211_STATUS_SUCCESS) 2573 IEEE80211_NODE_STAT(ni, tx_auth); 2574 else 2575 IEEE80211_NODE_STAT(ni, tx_auth_fail); 2576 2577 if (vap->iv_opmode == IEEE80211_M_STA) 2578 ieee80211_add_callback(m, ieee80211_tx_mgt_cb, 2579 (void *) vap->iv_state); 2580 break; 2581 2582 case IEEE80211_FC0_SUBTYPE_DEAUTH: 2583 IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni, 2584 "send station deauthenticate (reason: %d (%s))", arg, 2585 ieee80211_reason_to_string(arg)); 2586 m = ieee80211_getmgtframe(&frm, 2587 ic->ic_headroom + sizeof(struct ieee80211_frame), 2588 sizeof(uint16_t)); 2589 if (m == NULL) 2590 senderr(ENOMEM, is_tx_nobuf); 2591 *(uint16_t *)frm = htole16(arg); /* reason */ 2592 m->m_pkthdr.len = m->m_len = sizeof(uint16_t); 2593 2594 IEEE80211_NODE_STAT(ni, tx_deauth); 2595 IEEE80211_NODE_STAT_SET(ni, tx_deauth_code, arg); 2596 2597 ieee80211_node_unauthorize(ni); /* port closed */ 2598 break; 2599 2600 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 2601 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 2602 /* 2603 * asreq frame format 2604 * [2] capability information 2605 * [2] listen interval 2606 * [6*] current AP address (reassoc only) 2607 * [tlv] ssid 2608 * [tlv] supported rates 2609 * [tlv] extended supported rates 2610 * [4] power capability (optional) 2611 * [28] supported channels (optional) 2612 * [tlv] HT capabilities 2613 * [tlv] VHT capabilities 2614 * [tlv] WME (optional) 2615 * [tlv] Vendor OUI HT capabilities (optional) 2616 * [tlv] Atheros capabilities (if negotiated) 2617 * [tlv] AppIE's (optional) 2618 */ 2619 m = ieee80211_getmgtframe(&frm, 2620 ic->ic_headroom + sizeof(struct ieee80211_frame), 2621 sizeof(uint16_t) 2622 + sizeof(uint16_t) 2623 + IEEE80211_ADDR_LEN 2624 + 2 + IEEE80211_NWID_LEN 2625 + 2 + IEEE80211_RATE_SIZE 2626 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2627 + 4 2628 + 2 + 26 2629 + sizeof(struct ieee80211_wme_info) 2630 + sizeof(struct ieee80211_ie_htcap) 2631 + sizeof(struct ieee80211_ie_vhtcap) 2632 + 4 + sizeof(struct ieee80211_ie_htcap) 2633 #ifdef IEEE80211_SUPPORT_SUPERG 2634 + sizeof(struct ieee80211_ath_ie) 2635 #endif 2636 + (vap->iv_appie_wpa != NULL ? 2637 vap->iv_appie_wpa->ie_len : 0) 2638 + (vap->iv_appie_assocreq != NULL ? 2639 vap->iv_appie_assocreq->ie_len : 0) 2640 ); 2641 if (m == NULL) 2642 senderr(ENOMEM, is_tx_nobuf); 2643 2644 KASSERT(vap->iv_opmode == IEEE80211_M_STA, 2645 ("wrong mode %u", vap->iv_opmode)); 2646 capinfo = IEEE80211_CAPINFO_ESS; 2647 if (vap->iv_flags & IEEE80211_F_PRIVACY) 2648 capinfo |= IEEE80211_CAPINFO_PRIVACY; 2649 /* 2650 * NB: Some 11a AP's reject the request when 2651 * short preamble is set. 2652 */ 2653 if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && 2654 IEEE80211_IS_CHAN_2GHZ(ic->ic_curchan)) 2655 capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE; 2656 if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 2657 (ic->ic_caps & IEEE80211_C_SHSLOT)) 2658 capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME; 2659 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SPECTRUM_MGMT) && 2660 (vap->iv_flags & IEEE80211_F_DOTH)) 2661 capinfo |= IEEE80211_CAPINFO_SPECTRUM_MGMT; 2662 *(uint16_t *)frm = htole16(capinfo); 2663 frm += 2; 2664 2665 KASSERT(bss->ni_intval != 0, ("beacon interval is zero!")); 2666 *(uint16_t *)frm = htole16(howmany(ic->ic_lintval, 2667 bss->ni_intval)); 2668 frm += 2; 2669 2670 if (type == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) { 2671 IEEE80211_ADDR_COPY(frm, bss->ni_bssid); 2672 frm += IEEE80211_ADDR_LEN; 2673 } 2674 2675 frm = ieee80211_add_ssid(frm, ni->ni_essid, ni->ni_esslen); 2676 frm = ieee80211_add_rates(frm, &ni->ni_rates); 2677 frm = ieee80211_add_rsn(frm, vap); 2678 frm = ieee80211_add_xrates(frm, &ni->ni_rates); 2679 if (capinfo & IEEE80211_CAPINFO_SPECTRUM_MGMT) { 2680 frm = ieee80211_add_powercapability(frm, 2681 ic->ic_curchan); 2682 frm = ieee80211_add_supportedchannels(frm, ic); 2683 } 2684 2685 /* 2686 * Check the channel - we may be using an 11n NIC with an 2687 * 11n capable station, but we're configured to be an 11b 2688 * channel. 2689 */ 2690 if ((vap->iv_flags_ht & IEEE80211_FHT_HT) && 2691 IEEE80211_IS_CHAN_HT(ni->ni_chan) && 2692 ni->ni_ies.htcap_ie != NULL && 2693 ni->ni_ies.htcap_ie[0] == IEEE80211_ELEMID_HTCAP) { 2694 frm = ieee80211_add_htcap(frm, ni); 2695 } 2696 2697 if ((vap->iv_flags_vht & IEEE80211_FVHT_VHT) && 2698 IEEE80211_IS_CHAN_VHT(ni->ni_chan) && 2699 ni->ni_ies.vhtcap_ie != NULL && 2700 ni->ni_ies.vhtcap_ie[0] == IEEE80211_ELEMID_VHT_CAP) { 2701 frm = ieee80211_add_vhtcap(frm, ni); 2702 } 2703 2704 frm = ieee80211_add_wpa(frm, vap); 2705 if ((ic->ic_flags & IEEE80211_F_WME) && 2706 ni->ni_ies.wme_ie != NULL) 2707 frm = ieee80211_add_wme_info(frm, &ic->ic_wme); 2708 2709 /* 2710 * Same deal - only send HT info if we're on an 11n 2711 * capable channel. 2712 */ 2713 if ((vap->iv_flags_ht & IEEE80211_FHT_HT) && 2714 IEEE80211_IS_CHAN_HT(ni->ni_chan) && 2715 ni->ni_ies.htcap_ie != NULL && 2716 ni->ni_ies.htcap_ie[0] == IEEE80211_ELEMID_VENDOR) { 2717 frm = ieee80211_add_htcap_vendor(frm, ni); 2718 } 2719 #ifdef IEEE80211_SUPPORT_SUPERG 2720 if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS)) { 2721 frm = ieee80211_add_ath(frm, 2722 IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS), 2723 ((vap->iv_flags & IEEE80211_F_WPA) == 0 && 2724 ni->ni_authmode != IEEE80211_AUTH_8021X) ? 2725 vap->iv_def_txkey : IEEE80211_KEYIX_NONE); 2726 } 2727 #endif /* IEEE80211_SUPPORT_SUPERG */ 2728 if (vap->iv_appie_assocreq != NULL) 2729 frm = add_appie(frm, vap->iv_appie_assocreq); 2730 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2731 2732 ieee80211_add_callback(m, ieee80211_tx_mgt_cb, 2733 (void *) vap->iv_state); 2734 break; 2735 2736 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 2737 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 2738 /* 2739 * asresp frame format 2740 * [2] capability information 2741 * [2] status 2742 * [2] association ID 2743 * [tlv] supported rates 2744 * [tlv] extended supported rates 2745 * [tlv] HT capabilities (standard, if STA enabled) 2746 * [tlv] HT information (standard, if STA enabled) 2747 * [tlv] VHT capabilities (standard, if STA enabled) 2748 * [tlv] VHT information (standard, if STA enabled) 2749 * [tlv] WME (if configured and STA enabled) 2750 * [tlv] HT capabilities (vendor OUI, if STA enabled) 2751 * [tlv] HT information (vendor OUI, if STA enabled) 2752 * [tlv] Atheros capabilities (if STA enabled) 2753 * [tlv] AppIE's (optional) 2754 */ 2755 m = ieee80211_getmgtframe(&frm, 2756 ic->ic_headroom + sizeof(struct ieee80211_frame), 2757 sizeof(uint16_t) 2758 + sizeof(uint16_t) 2759 + sizeof(uint16_t) 2760 + 2 + IEEE80211_RATE_SIZE 2761 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2762 + sizeof(struct ieee80211_ie_htcap) + 4 2763 + sizeof(struct ieee80211_ie_htinfo) + 4 2764 + sizeof(struct ieee80211_ie_vhtcap) 2765 + sizeof(struct ieee80211_ie_vht_operation) 2766 + sizeof(struct ieee80211_wme_param) 2767 #ifdef IEEE80211_SUPPORT_SUPERG 2768 + sizeof(struct ieee80211_ath_ie) 2769 #endif 2770 + (vap->iv_appie_assocresp != NULL ? 2771 vap->iv_appie_assocresp->ie_len : 0) 2772 ); 2773 if (m == NULL) 2774 senderr(ENOMEM, is_tx_nobuf); 2775 2776 capinfo = ieee80211_getcapinfo(vap, bss->ni_chan); 2777 *(uint16_t *)frm = htole16(capinfo); 2778 frm += 2; 2779 2780 *(uint16_t *)frm = htole16(arg); /* status */ 2781 frm += 2; 2782 2783 if (arg == IEEE80211_STATUS_SUCCESS) { 2784 *(uint16_t *)frm = htole16(ni->ni_associd); 2785 IEEE80211_NODE_STAT(ni, tx_assoc); 2786 } else 2787 IEEE80211_NODE_STAT(ni, tx_assoc_fail); 2788 frm += 2; 2789 2790 frm = ieee80211_add_rates(frm, &ni->ni_rates); 2791 frm = ieee80211_add_xrates(frm, &ni->ni_rates); 2792 /* NB: respond according to what we received */ 2793 if ((ni->ni_flags & HTFLAGS) == IEEE80211_NODE_HT) { 2794 frm = ieee80211_add_htcap(frm, ni); 2795 frm = ieee80211_add_htinfo(frm, ni); 2796 } 2797 if ((vap->iv_flags & IEEE80211_F_WME) && 2798 ni->ni_ies.wme_ie != NULL) 2799 frm = ieee80211_add_wme_param(frm, &ic->ic_wme); 2800 if ((ni->ni_flags & HTFLAGS) == HTFLAGS) { 2801 frm = ieee80211_add_htcap_vendor(frm, ni); 2802 frm = ieee80211_add_htinfo_vendor(frm, ni); 2803 } 2804 if (ni->ni_flags & IEEE80211_NODE_VHT) { 2805 frm = ieee80211_add_vhtcap(frm, ni); 2806 frm = ieee80211_add_vhtinfo(frm, ni); 2807 } 2808 #ifdef IEEE80211_SUPPORT_SUPERG 2809 if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS)) 2810 frm = ieee80211_add_ath(frm, 2811 IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS), 2812 ((vap->iv_flags & IEEE80211_F_WPA) == 0 && 2813 ni->ni_authmode != IEEE80211_AUTH_8021X) ? 2814 vap->iv_def_txkey : IEEE80211_KEYIX_NONE); 2815 #endif /* IEEE80211_SUPPORT_SUPERG */ 2816 if (vap->iv_appie_assocresp != NULL) 2817 frm = add_appie(frm, vap->iv_appie_assocresp); 2818 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2819 break; 2820 2821 case IEEE80211_FC0_SUBTYPE_DISASSOC: 2822 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 2823 "send station disassociate (reason: %d (%s))", arg, 2824 ieee80211_reason_to_string(arg)); 2825 m = ieee80211_getmgtframe(&frm, 2826 ic->ic_headroom + sizeof(struct ieee80211_frame), 2827 sizeof(uint16_t)); 2828 if (m == NULL) 2829 senderr(ENOMEM, is_tx_nobuf); 2830 *(uint16_t *)frm = htole16(arg); /* reason */ 2831 m->m_pkthdr.len = m->m_len = sizeof(uint16_t); 2832 2833 IEEE80211_NODE_STAT(ni, tx_disassoc); 2834 IEEE80211_NODE_STAT_SET(ni, tx_disassoc_code, arg); 2835 break; 2836 2837 default: 2838 IEEE80211_NOTE(vap, IEEE80211_MSG_ANY, ni, 2839 "invalid mgmt frame type %u", type); 2840 senderr(EINVAL, is_tx_unknownmgt); 2841 /* NOTREACHED */ 2842 } 2843 2844 /* NB: force non-ProbeResp frames to the highest queue */ 2845 params.ibp_pri = WME_AC_VO; 2846 params.ibp_rate0 = bss->ni_txparms->mgmtrate; 2847 /* NB: we know all frames are unicast */ 2848 params.ibp_try0 = bss->ni_txparms->maxretry; 2849 params.ibp_power = bss->ni_txpower; 2850 return ieee80211_mgmt_output(ni, m, type, ¶ms); 2851 bad: 2852 ieee80211_free_node(ni); 2853 return ret; 2854 #undef senderr 2855 #undef HTFLAGS 2856 } 2857 2858 /* 2859 * Return an mbuf with a probe response frame in it. 2860 * Space is left to prepend and 802.11 header at the 2861 * front but it's left to the caller to fill in. 2862 */ 2863 struct mbuf * 2864 ieee80211_alloc_proberesp(struct ieee80211_node *bss, int legacy) 2865 { 2866 struct ieee80211vap *vap = bss->ni_vap; 2867 struct ieee80211com *ic = bss->ni_ic; 2868 const struct ieee80211_rateset *rs; 2869 struct mbuf *m; 2870 uint16_t capinfo; 2871 uint8_t *frm; 2872 2873 /* 2874 * probe response frame format 2875 * [8] time stamp 2876 * [2] beacon interval 2877 * [2] cabability information 2878 * [tlv] ssid 2879 * [tlv] supported rates 2880 * [tlv] parameter set (FH/DS) 2881 * [tlv] parameter set (IBSS) 2882 * [tlv] country (optional) 2883 * [3] power control (optional) 2884 * [5] channel switch announcement (CSA) (optional) 2885 * [tlv] extended rate phy (ERP) 2886 * [tlv] extended supported rates 2887 * [tlv] RSN (optional) 2888 * [tlv] HT capabilities 2889 * [tlv] HT information 2890 * [tlv] VHT capabilities 2891 * [tlv] VHT information 2892 * [tlv] WPA (optional) 2893 * [tlv] WME (optional) 2894 * [tlv] Vendor OUI HT capabilities (optional) 2895 * [tlv] Vendor OUI HT information (optional) 2896 * [tlv] Atheros capabilities 2897 * [tlv] AppIE's (optional) 2898 * [tlv] Mesh ID (MBSS) 2899 * [tlv] Mesh Conf (MBSS) 2900 */ 2901 m = ieee80211_getmgtframe(&frm, 2902 ic->ic_headroom + sizeof(struct ieee80211_frame), 2903 8 2904 + sizeof(uint16_t) 2905 + sizeof(uint16_t) 2906 + 2 + IEEE80211_NWID_LEN 2907 + 2 + IEEE80211_RATE_SIZE 2908 + 7 /* max(7,3) */ 2909 + IEEE80211_COUNTRY_MAX_SIZE 2910 + 3 2911 + sizeof(struct ieee80211_csa_ie) 2912 + sizeof(struct ieee80211_quiet_ie) 2913 + 3 2914 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2915 + sizeof(struct ieee80211_ie_wpa) 2916 + sizeof(struct ieee80211_ie_htcap) 2917 + sizeof(struct ieee80211_ie_htinfo) 2918 + sizeof(struct ieee80211_ie_wpa) 2919 + sizeof(struct ieee80211_wme_param) 2920 + 4 + sizeof(struct ieee80211_ie_htcap) 2921 + 4 + sizeof(struct ieee80211_ie_htinfo) 2922 + sizeof(struct ieee80211_ie_vhtcap) 2923 + sizeof(struct ieee80211_ie_vht_operation) 2924 #ifdef IEEE80211_SUPPORT_SUPERG 2925 + sizeof(struct ieee80211_ath_ie) 2926 #endif 2927 #ifdef IEEE80211_SUPPORT_MESH 2928 + 2 + IEEE80211_MESHID_LEN 2929 + sizeof(struct ieee80211_meshconf_ie) 2930 #endif 2931 + (vap->iv_appie_proberesp != NULL ? 2932 vap->iv_appie_proberesp->ie_len : 0) 2933 ); 2934 if (m == NULL) { 2935 vap->iv_stats.is_tx_nobuf++; 2936 return NULL; 2937 } 2938 2939 memset(frm, 0, 8); /* timestamp should be filled later */ 2940 frm += 8; 2941 *(uint16_t *)frm = htole16(bss->ni_intval); 2942 frm += 2; 2943 capinfo = ieee80211_getcapinfo(vap, bss->ni_chan); 2944 *(uint16_t *)frm = htole16(capinfo); 2945 frm += 2; 2946 2947 frm = ieee80211_add_ssid(frm, bss->ni_essid, bss->ni_esslen); 2948 rs = ieee80211_get_suprates(ic, bss->ni_chan); 2949 frm = ieee80211_add_rates(frm, rs); 2950 2951 if (IEEE80211_IS_CHAN_FHSS(bss->ni_chan)) { 2952 *frm++ = IEEE80211_ELEMID_FHPARMS; 2953 *frm++ = 5; 2954 *frm++ = bss->ni_fhdwell & 0x00ff; 2955 *frm++ = (bss->ni_fhdwell >> 8) & 0x00ff; 2956 *frm++ = IEEE80211_FH_CHANSET( 2957 ieee80211_chan2ieee(ic, bss->ni_chan)); 2958 *frm++ = IEEE80211_FH_CHANPAT( 2959 ieee80211_chan2ieee(ic, bss->ni_chan)); 2960 *frm++ = bss->ni_fhindex; 2961 } else { 2962 *frm++ = IEEE80211_ELEMID_DSPARMS; 2963 *frm++ = 1; 2964 *frm++ = ieee80211_chan2ieee(ic, bss->ni_chan); 2965 } 2966 2967 if (vap->iv_opmode == IEEE80211_M_IBSS) { 2968 *frm++ = IEEE80211_ELEMID_IBSSPARMS; 2969 *frm++ = 2; 2970 *frm++ = 0; *frm++ = 0; /* TODO: ATIM window */ 2971 } 2972 if ((vap->iv_flags & IEEE80211_F_DOTH) || 2973 (vap->iv_flags_ext & IEEE80211_FEXT_DOTD)) 2974 frm = ieee80211_add_countryie(frm, ic); 2975 if (vap->iv_flags & IEEE80211_F_DOTH) { 2976 if (IEEE80211_IS_CHAN_5GHZ(bss->ni_chan)) 2977 frm = ieee80211_add_powerconstraint(frm, vap); 2978 if (ic->ic_flags & IEEE80211_F_CSAPENDING) 2979 frm = ieee80211_add_csa(frm, vap); 2980 } 2981 if (vap->iv_flags & IEEE80211_F_DOTH) { 2982 if (IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) && 2983 (vap->iv_flags_ext & IEEE80211_FEXT_DFS)) { 2984 if (vap->iv_quiet) 2985 frm = ieee80211_add_quiet(frm, vap, 0); 2986 } 2987 } 2988 if (IEEE80211_IS_CHAN_ANYG(bss->ni_chan)) 2989 frm = ieee80211_add_erp(frm, ic); 2990 frm = ieee80211_add_xrates(frm, rs); 2991 frm = ieee80211_add_rsn(frm, vap); 2992 /* 2993 * NB: legacy 11b clients do not get certain ie's. 2994 * The caller identifies such clients by passing 2995 * a token in legacy to us. Could expand this to be 2996 * any legacy client for stuff like HT ie's. 2997 */ 2998 if (IEEE80211_IS_CHAN_HT(bss->ni_chan) && 2999 legacy != IEEE80211_SEND_LEGACY_11B) { 3000 frm = ieee80211_add_htcap(frm, bss); 3001 frm = ieee80211_add_htinfo(frm, bss); 3002 } 3003 if (IEEE80211_IS_CHAN_VHT(bss->ni_chan) && 3004 legacy != IEEE80211_SEND_LEGACY_11B) { 3005 frm = ieee80211_add_vhtcap(frm, bss); 3006 frm = ieee80211_add_vhtinfo(frm, bss); 3007 } 3008 frm = ieee80211_add_wpa(frm, vap); 3009 if (vap->iv_flags & IEEE80211_F_WME) 3010 frm = ieee80211_add_wme_param(frm, &ic->ic_wme); 3011 if (IEEE80211_IS_CHAN_HT(bss->ni_chan) && 3012 (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) && 3013 legacy != IEEE80211_SEND_LEGACY_11B) { 3014 frm = ieee80211_add_htcap_vendor(frm, bss); 3015 frm = ieee80211_add_htinfo_vendor(frm, bss); 3016 } 3017 #ifdef IEEE80211_SUPPORT_SUPERG 3018 if ((vap->iv_flags & IEEE80211_F_ATHEROS) && 3019 legacy != IEEE80211_SEND_LEGACY_11B) 3020 frm = ieee80211_add_athcaps(frm, bss); 3021 #endif 3022 if (vap->iv_appie_proberesp != NULL) 3023 frm = add_appie(frm, vap->iv_appie_proberesp); 3024 #ifdef IEEE80211_SUPPORT_MESH 3025 if (vap->iv_opmode == IEEE80211_M_MBSS) { 3026 frm = ieee80211_add_meshid(frm, vap); 3027 frm = ieee80211_add_meshconf(frm, vap); 3028 } 3029 #endif 3030 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 3031 3032 return m; 3033 } 3034 3035 /* 3036 * Send a probe response frame to the specified mac address. 3037 * This does not go through the normal mgt frame api so we 3038 * can specify the destination address and re-use the bss node 3039 * for the sta reference. 3040 */ 3041 int 3042 ieee80211_send_proberesp(struct ieee80211vap *vap, 3043 const uint8_t da[IEEE80211_ADDR_LEN], int legacy) 3044 { 3045 struct ieee80211_node *bss = vap->iv_bss; 3046 struct ieee80211com *ic = vap->iv_ic; 3047 struct mbuf *m; 3048 int ret; 3049 3050 if (vap->iv_state == IEEE80211_S_CAC) { 3051 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, bss, 3052 "block %s frame in CAC state", "probe response"); 3053 vap->iv_stats.is_tx_badstate++; 3054 return EIO; /* XXX */ 3055 } 3056 3057 /* 3058 * Hold a reference on the node so it doesn't go away until after 3059 * the xmit is complete all the way in the driver. On error we 3060 * will remove our reference. 3061 */ 3062 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 3063 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", 3064 __func__, __LINE__, bss, ether_sprintf(bss->ni_macaddr), 3065 ieee80211_node_refcnt(bss)+1); 3066 ieee80211_ref_node(bss); 3067 3068 m = ieee80211_alloc_proberesp(bss, legacy); 3069 if (m == NULL) { 3070 ieee80211_free_node(bss); 3071 return ENOMEM; 3072 } 3073 3074 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); 3075 KASSERT(m != NULL, ("no room for header")); 3076 3077 IEEE80211_TX_LOCK(ic); 3078 ieee80211_send_setup(bss, m, 3079 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_RESP, 3080 IEEE80211_NONQOS_TID, vap->iv_myaddr, da, bss->ni_bssid); 3081 /* XXX power management? */ 3082 m->m_flags |= M_ENCAP; /* mark encapsulated */ 3083 3084 M_WME_SETAC(m, WME_AC_BE); 3085 3086 IEEE80211_DPRINTF(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS, 3087 "send probe resp on channel %u to %s%s\n", 3088 ieee80211_chan2ieee(ic, ic->ic_curchan), ether_sprintf(da), 3089 legacy ? " <legacy>" : ""); 3090 IEEE80211_NODE_STAT(bss, tx_mgmt); 3091 3092 ret = ieee80211_raw_output(vap, bss, m, NULL); 3093 IEEE80211_TX_UNLOCK(ic); 3094 return (ret); 3095 } 3096 3097 /* 3098 * Allocate and build a RTS (Request To Send) control frame. 3099 */ 3100 struct mbuf * 3101 ieee80211_alloc_rts(struct ieee80211com *ic, 3102 const uint8_t ra[IEEE80211_ADDR_LEN], 3103 const uint8_t ta[IEEE80211_ADDR_LEN], 3104 uint16_t dur) 3105 { 3106 struct ieee80211_frame_rts *rts; 3107 struct mbuf *m; 3108 3109 /* XXX honor ic_headroom */ 3110 m = m_gethdr(M_NOWAIT, MT_DATA); 3111 if (m != NULL) { 3112 rts = mtod(m, struct ieee80211_frame_rts *); 3113 rts->i_fc[0] = IEEE80211_FC0_VERSION_0 | 3114 IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_RTS; 3115 rts->i_fc[1] = IEEE80211_FC1_DIR_NODS; 3116 *(u_int16_t *)rts->i_dur = htole16(dur); 3117 IEEE80211_ADDR_COPY(rts->i_ra, ra); 3118 IEEE80211_ADDR_COPY(rts->i_ta, ta); 3119 3120 m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_rts); 3121 } 3122 return m; 3123 } 3124 3125 /* 3126 * Allocate and build a CTS (Clear To Send) control frame. 3127 */ 3128 struct mbuf * 3129 ieee80211_alloc_cts(struct ieee80211com *ic, 3130 const uint8_t ra[IEEE80211_ADDR_LEN], uint16_t dur) 3131 { 3132 struct ieee80211_frame_cts *cts; 3133 struct mbuf *m; 3134 3135 /* XXX honor ic_headroom */ 3136 m = m_gethdr(M_NOWAIT, MT_DATA); 3137 if (m != NULL) { 3138 cts = mtod(m, struct ieee80211_frame_cts *); 3139 cts->i_fc[0] = IEEE80211_FC0_VERSION_0 | 3140 IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_CTS; 3141 cts->i_fc[1] = IEEE80211_FC1_DIR_NODS; 3142 *(u_int16_t *)cts->i_dur = htole16(dur); 3143 IEEE80211_ADDR_COPY(cts->i_ra, ra); 3144 3145 m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_cts); 3146 } 3147 return m; 3148 } 3149 3150 /* 3151 * Wrapper for CTS/RTS frame allocation. 3152 */ 3153 struct mbuf * 3154 ieee80211_alloc_prot(struct ieee80211_node *ni, const struct mbuf *m, 3155 uint8_t rate, int prot) 3156 { 3157 struct ieee80211com *ic = ni->ni_ic; 3158 const struct ieee80211_frame *wh; 3159 struct mbuf *mprot; 3160 uint16_t dur; 3161 int pktlen, isshort; 3162 3163 KASSERT(prot == IEEE80211_PROT_RTSCTS || 3164 prot == IEEE80211_PROT_CTSONLY, 3165 ("wrong protection type %d", prot)); 3166 3167 wh = mtod(m, const struct ieee80211_frame *); 3168 pktlen = m->m_pkthdr.len + IEEE80211_CRC_LEN; 3169 isshort = (ic->ic_flags & IEEE80211_F_SHPREAMBLE) != 0; 3170 dur = ieee80211_compute_duration(ic->ic_rt, pktlen, rate, isshort) 3171 + ieee80211_ack_duration(ic->ic_rt, rate, isshort); 3172 3173 if (prot == IEEE80211_PROT_RTSCTS) { 3174 /* NB: CTS is the same size as an ACK */ 3175 dur += ieee80211_ack_duration(ic->ic_rt, rate, isshort); 3176 mprot = ieee80211_alloc_rts(ic, wh->i_addr1, wh->i_addr2, dur); 3177 } else 3178 mprot = ieee80211_alloc_cts(ic, ni->ni_vap->iv_myaddr, dur); 3179 3180 return (mprot); 3181 } 3182 3183 static void 3184 ieee80211_tx_mgt_timeout(void *arg) 3185 { 3186 struct ieee80211vap *vap = arg; 3187 3188 IEEE80211_LOCK(vap->iv_ic); 3189 if (vap->iv_state != IEEE80211_S_INIT && 3190 (vap->iv_ic->ic_flags & IEEE80211_F_SCAN) == 0) { 3191 /* 3192 * NB: it's safe to specify a timeout as the reason here; 3193 * it'll only be used in the right state. 3194 */ 3195 ieee80211_new_state_locked(vap, IEEE80211_S_SCAN, 3196 IEEE80211_SCAN_FAIL_TIMEOUT); 3197 } 3198 IEEE80211_UNLOCK(vap->iv_ic); 3199 } 3200 3201 /* 3202 * This is the callback set on net80211-sourced transmitted 3203 * authentication request frames. 3204 * 3205 * This does a couple of things: 3206 * 3207 * + If the frame transmitted was a success, it schedules a future 3208 * event which will transition the interface to scan. 3209 * If a state transition _then_ occurs before that event occurs, 3210 * said state transition will cancel this callout. 3211 * 3212 * + If the frame transmit was a failure, it immediately schedules 3213 * the transition back to scan. 3214 */ 3215 static void 3216 ieee80211_tx_mgt_cb(struct ieee80211_node *ni, void *arg, int status) 3217 { 3218 struct ieee80211vap *vap = ni->ni_vap; 3219 enum ieee80211_state ostate = (enum ieee80211_state) arg; 3220 3221 /* 3222 * Frame transmit completed; arrange timer callback. If 3223 * transmit was successfully we wait for response. Otherwise 3224 * we arrange an immediate callback instead of doing the 3225 * callback directly since we don't know what state the driver 3226 * is in (e.g. what locks it is holding). This work should 3227 * not be too time-critical and not happen too often so the 3228 * added overhead is acceptable. 3229 * 3230 * XXX what happens if !acked but response shows up before callback? 3231 */ 3232 if (vap->iv_state == ostate) { 3233 callout_reset(&vap->iv_mgtsend, 3234 status == 0 ? IEEE80211_TRANS_WAIT*hz : 0, 3235 ieee80211_tx_mgt_timeout, vap); 3236 } 3237 } 3238 3239 static void 3240 ieee80211_beacon_construct(struct mbuf *m, uint8_t *frm, 3241 struct ieee80211_node *ni) 3242 { 3243 struct ieee80211vap *vap = ni->ni_vap; 3244 struct ieee80211_beacon_offsets *bo = &vap->iv_bcn_off; 3245 struct ieee80211com *ic = ni->ni_ic; 3246 struct ieee80211_rateset *rs = &ni->ni_rates; 3247 uint16_t capinfo; 3248 3249 /* 3250 * beacon frame format 3251 * 3252 * TODO: update to 802.11-2012; a lot of stuff has changed; 3253 * vendor extensions should be at the end, etc. 3254 * 3255 * [8] time stamp 3256 * [2] beacon interval 3257 * [2] cabability information 3258 * [tlv] ssid 3259 * [tlv] supported rates 3260 * [3] parameter set (DS) 3261 * [8] CF parameter set (optional) 3262 * [tlv] parameter set (IBSS/TIM) 3263 * [tlv] country (optional) 3264 * [3] power control (optional) 3265 * [5] channel switch announcement (CSA) (optional) 3266 * XXX TODO: Quiet 3267 * XXX TODO: IBSS DFS 3268 * XXX TODO: TPC report 3269 * [tlv] extended rate phy (ERP) 3270 * [tlv] extended supported rates 3271 * [tlv] RSN parameters 3272 * XXX TODO: BSSLOAD 3273 * (XXX EDCA parameter set, QoS capability?) 3274 * XXX TODO: AP channel report 3275 * 3276 * [tlv] HT capabilities 3277 * [tlv] HT information 3278 * XXX TODO: 20/40 BSS coexistence 3279 * Mesh: 3280 * XXX TODO: Meshid 3281 * XXX TODO: mesh config 3282 * XXX TODO: mesh awake window 3283 * XXX TODO: beacon timing (mesh, etc) 3284 * XXX TODO: MCCAOP Advertisement Overview 3285 * XXX TODO: MCCAOP Advertisement 3286 * XXX TODO: Mesh channel switch parameters 3287 * VHT: 3288 * XXX TODO: VHT capabilities 3289 * XXX TODO: VHT operation 3290 * XXX TODO: VHT transmit power envelope 3291 * XXX TODO: channel switch wrapper element 3292 * XXX TODO: extended BSS load element 3293 * 3294 * XXX Vendor-specific OIDs (e.g. Atheros) 3295 * [tlv] WPA parameters 3296 * [tlv] WME parameters 3297 * [tlv] Vendor OUI HT capabilities (optional) 3298 * [tlv] Vendor OUI HT information (optional) 3299 * [tlv] Atheros capabilities (optional) 3300 * [tlv] TDMA parameters (optional) 3301 * [tlv] Mesh ID (MBSS) 3302 * [tlv] Mesh Conf (MBSS) 3303 * [tlv] application data (optional) 3304 */ 3305 3306 memset(bo, 0, sizeof(*bo)); 3307 3308 memset(frm, 0, 8); /* XXX timestamp is set by hardware/driver */ 3309 frm += 8; 3310 *(uint16_t *)frm = htole16(ni->ni_intval); 3311 frm += 2; 3312 capinfo = ieee80211_getcapinfo(vap, ni->ni_chan); 3313 bo->bo_caps = (uint16_t *)frm; 3314 *(uint16_t *)frm = htole16(capinfo); 3315 frm += 2; 3316 *frm++ = IEEE80211_ELEMID_SSID; 3317 if ((vap->iv_flags & IEEE80211_F_HIDESSID) == 0) { 3318 *frm++ = ni->ni_esslen; 3319 memcpy(frm, ni->ni_essid, ni->ni_esslen); 3320 frm += ni->ni_esslen; 3321 } else 3322 *frm++ = 0; 3323 frm = ieee80211_add_rates(frm, rs); 3324 if (!IEEE80211_IS_CHAN_FHSS(ni->ni_chan)) { 3325 *frm++ = IEEE80211_ELEMID_DSPARMS; 3326 *frm++ = 1; 3327 *frm++ = ieee80211_chan2ieee(ic, ni->ni_chan); 3328 } 3329 if (ic->ic_flags & IEEE80211_F_PCF) { 3330 bo->bo_cfp = frm; 3331 frm = ieee80211_add_cfparms(frm, ic); 3332 } 3333 bo->bo_tim = frm; 3334 if (vap->iv_opmode == IEEE80211_M_IBSS) { 3335 *frm++ = IEEE80211_ELEMID_IBSSPARMS; 3336 *frm++ = 2; 3337 *frm++ = 0; *frm++ = 0; /* TODO: ATIM window */ 3338 bo->bo_tim_len = 0; 3339 } else if (vap->iv_opmode == IEEE80211_M_HOSTAP || 3340 vap->iv_opmode == IEEE80211_M_MBSS) { 3341 /* TIM IE is the same for Mesh and Hostap */ 3342 struct ieee80211_tim_ie *tie = (struct ieee80211_tim_ie *) frm; 3343 3344 tie->tim_ie = IEEE80211_ELEMID_TIM; 3345 tie->tim_len = 4; /* length */ 3346 tie->tim_count = 0; /* DTIM count */ 3347 tie->tim_period = vap->iv_dtim_period; /* DTIM period */ 3348 tie->tim_bitctl = 0; /* bitmap control */ 3349 tie->tim_bitmap[0] = 0; /* Partial Virtual Bitmap */ 3350 frm += sizeof(struct ieee80211_tim_ie); 3351 bo->bo_tim_len = 1; 3352 } 3353 bo->bo_tim_trailer = frm; 3354 if ((vap->iv_flags & IEEE80211_F_DOTH) || 3355 (vap->iv_flags_ext & IEEE80211_FEXT_DOTD)) 3356 frm = ieee80211_add_countryie(frm, ic); 3357 if (vap->iv_flags & IEEE80211_F_DOTH) { 3358 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 3359 frm = ieee80211_add_powerconstraint(frm, vap); 3360 bo->bo_csa = frm; 3361 if (ic->ic_flags & IEEE80211_F_CSAPENDING) 3362 frm = ieee80211_add_csa(frm, vap); 3363 } else 3364 bo->bo_csa = frm; 3365 3366 bo->bo_quiet = NULL; 3367 if (vap->iv_flags & IEEE80211_F_DOTH) { 3368 if (IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) && 3369 (vap->iv_flags_ext & IEEE80211_FEXT_DFS) && 3370 (vap->iv_quiet == 1)) { 3371 /* 3372 * We only insert the quiet IE offset if 3373 * the quiet IE is enabled. Otherwise don't 3374 * put it here or we'll just overwrite 3375 * some other beacon contents. 3376 */ 3377 if (vap->iv_quiet) { 3378 bo->bo_quiet = frm; 3379 frm = ieee80211_add_quiet(frm,vap, 0); 3380 } 3381 } 3382 } 3383 3384 if (IEEE80211_IS_CHAN_ANYG(ni->ni_chan)) { 3385 bo->bo_erp = frm; 3386 frm = ieee80211_add_erp(frm, ic); 3387 } 3388 frm = ieee80211_add_xrates(frm, rs); 3389 frm = ieee80211_add_rsn(frm, vap); 3390 if (IEEE80211_IS_CHAN_HT(ni->ni_chan)) { 3391 frm = ieee80211_add_htcap(frm, ni); 3392 bo->bo_htinfo = frm; 3393 frm = ieee80211_add_htinfo(frm, ni); 3394 } 3395 3396 if (IEEE80211_IS_CHAN_VHT(ni->ni_chan)) { 3397 frm = ieee80211_add_vhtcap(frm, ni); 3398 bo->bo_vhtinfo = frm; 3399 frm = ieee80211_add_vhtinfo(frm, ni); 3400 /* Transmit power envelope */ 3401 /* Channel switch wrapper element */ 3402 /* Extended bss load element */ 3403 } 3404 3405 frm = ieee80211_add_wpa(frm, vap); 3406 if (vap->iv_flags & IEEE80211_F_WME) { 3407 bo->bo_wme = frm; 3408 frm = ieee80211_add_wme_param(frm, &ic->ic_wme); 3409 } 3410 if (IEEE80211_IS_CHAN_HT(ni->ni_chan) && 3411 (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT)) { 3412 frm = ieee80211_add_htcap_vendor(frm, ni); 3413 frm = ieee80211_add_htinfo_vendor(frm, ni); 3414 } 3415 3416 #ifdef IEEE80211_SUPPORT_SUPERG 3417 if (vap->iv_flags & IEEE80211_F_ATHEROS) { 3418 bo->bo_ath = frm; 3419 frm = ieee80211_add_athcaps(frm, ni); 3420 } 3421 #endif 3422 #ifdef IEEE80211_SUPPORT_TDMA 3423 if (vap->iv_caps & IEEE80211_C_TDMA) { 3424 bo->bo_tdma = frm; 3425 frm = ieee80211_add_tdma(frm, vap); 3426 } 3427 #endif 3428 if (vap->iv_appie_beacon != NULL) { 3429 bo->bo_appie = frm; 3430 bo->bo_appie_len = vap->iv_appie_beacon->ie_len; 3431 frm = add_appie(frm, vap->iv_appie_beacon); 3432 } 3433 3434 /* XXX TODO: move meshid/meshconf up to before vendor extensions? */ 3435 #ifdef IEEE80211_SUPPORT_MESH 3436 if (vap->iv_opmode == IEEE80211_M_MBSS) { 3437 frm = ieee80211_add_meshid(frm, vap); 3438 bo->bo_meshconf = frm; 3439 frm = ieee80211_add_meshconf(frm, vap); 3440 } 3441 #endif 3442 bo->bo_tim_trailer_len = frm - bo->bo_tim_trailer; 3443 bo->bo_csa_trailer_len = frm - bo->bo_csa; 3444 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 3445 } 3446 3447 /* 3448 * Allocate a beacon frame and fillin the appropriate bits. 3449 */ 3450 struct mbuf * 3451 ieee80211_beacon_alloc(struct ieee80211_node *ni) 3452 { 3453 struct ieee80211vap *vap = ni->ni_vap; 3454 struct ieee80211com *ic = ni->ni_ic; 3455 struct ifnet *ifp = vap->iv_ifp; 3456 struct ieee80211_frame *wh; 3457 struct mbuf *m; 3458 int pktlen; 3459 uint8_t *frm; 3460 3461 /* 3462 * Update the "We're putting the quiet IE in the beacon" state. 3463 */ 3464 if (vap->iv_quiet == 1) 3465 vap->iv_flags_ext |= IEEE80211_FEXT_QUIET_IE; 3466 else if (vap->iv_quiet == 0) 3467 vap->iv_flags_ext &= ~IEEE80211_FEXT_QUIET_IE; 3468 3469 /* 3470 * beacon frame format 3471 * 3472 * Note: This needs updating for 802.11-2012. 3473 * 3474 * [8] time stamp 3475 * [2] beacon interval 3476 * [2] cabability information 3477 * [tlv] ssid 3478 * [tlv] supported rates 3479 * [3] parameter set (DS) 3480 * [8] CF parameter set (optional) 3481 * [tlv] parameter set (IBSS/TIM) 3482 * [tlv] country (optional) 3483 * [3] power control (optional) 3484 * [5] channel switch announcement (CSA) (optional) 3485 * [tlv] extended rate phy (ERP) 3486 * [tlv] extended supported rates 3487 * [tlv] RSN parameters 3488 * [tlv] HT capabilities 3489 * [tlv] HT information 3490 * [tlv] VHT capabilities 3491 * [tlv] VHT operation 3492 * [tlv] Vendor OUI HT capabilities (optional) 3493 * [tlv] Vendor OUI HT information (optional) 3494 * XXX Vendor-specific OIDs (e.g. Atheros) 3495 * [tlv] WPA parameters 3496 * [tlv] WME parameters 3497 * [tlv] TDMA parameters (optional) 3498 * [tlv] Mesh ID (MBSS) 3499 * [tlv] Mesh Conf (MBSS) 3500 * [tlv] application data (optional) 3501 * NB: we allocate the max space required for the TIM bitmap. 3502 * XXX how big is this? 3503 */ 3504 pktlen = 8 /* time stamp */ 3505 + sizeof(uint16_t) /* beacon interval */ 3506 + sizeof(uint16_t) /* capabilities */ 3507 + 2 + ni->ni_esslen /* ssid */ 3508 + 2 + IEEE80211_RATE_SIZE /* supported rates */ 3509 + 2 + 1 /* DS parameters */ 3510 + 2 + 6 /* CF parameters */ 3511 + 2 + 4 + vap->iv_tim_len /* DTIM/IBSSPARMS */ 3512 + IEEE80211_COUNTRY_MAX_SIZE /* country */ 3513 + 2 + 1 /* power control */ 3514 + sizeof(struct ieee80211_csa_ie) /* CSA */ 3515 + sizeof(struct ieee80211_quiet_ie) /* Quiet */ 3516 + 2 + 1 /* ERP */ 3517 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 3518 + (vap->iv_caps & IEEE80211_C_WPA ? /* WPA 1+2 */ 3519 2*sizeof(struct ieee80211_ie_wpa) : 0) 3520 /* XXX conditional? */ 3521 + 4+2*sizeof(struct ieee80211_ie_htcap)/* HT caps */ 3522 + 4+2*sizeof(struct ieee80211_ie_htinfo)/* HT info */ 3523 + sizeof(struct ieee80211_ie_vhtcap)/* VHT caps */ 3524 + sizeof(struct ieee80211_ie_vht_operation)/* VHT info */ 3525 + (vap->iv_caps & IEEE80211_C_WME ? /* WME */ 3526 sizeof(struct ieee80211_wme_param) : 0) 3527 #ifdef IEEE80211_SUPPORT_SUPERG 3528 + sizeof(struct ieee80211_ath_ie) /* ATH */ 3529 #endif 3530 #ifdef IEEE80211_SUPPORT_TDMA 3531 + (vap->iv_caps & IEEE80211_C_TDMA ? /* TDMA */ 3532 sizeof(struct ieee80211_tdma_param) : 0) 3533 #endif 3534 #ifdef IEEE80211_SUPPORT_MESH 3535 + 2 + ni->ni_meshidlen 3536 + sizeof(struct ieee80211_meshconf_ie) 3537 #endif 3538 + IEEE80211_MAX_APPIE 3539 ; 3540 m = ieee80211_getmgtframe(&frm, 3541 ic->ic_headroom + sizeof(struct ieee80211_frame), pktlen); 3542 if (m == NULL) { 3543 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY, 3544 "%s: cannot get buf; size %u\n", __func__, pktlen); 3545 vap->iv_stats.is_tx_nobuf++; 3546 return NULL; 3547 } 3548 ieee80211_beacon_construct(m, frm, ni); 3549 3550 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); 3551 KASSERT(m != NULL, ("no space for 802.11 header?")); 3552 wh = mtod(m, struct ieee80211_frame *); 3553 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT | 3554 IEEE80211_FC0_SUBTYPE_BEACON; 3555 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 3556 *(uint16_t *)wh->i_dur = 0; 3557 IEEE80211_ADDR_COPY(wh->i_addr1, ifp->if_broadcastaddr); 3558 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); 3559 IEEE80211_ADDR_COPY(wh->i_addr3, ni->ni_bssid); 3560 *(uint16_t *)wh->i_seq = 0; 3561 3562 return m; 3563 } 3564 3565 /* 3566 * Update the dynamic parts of a beacon frame based on the current state. 3567 */ 3568 int 3569 ieee80211_beacon_update(struct ieee80211_node *ni, struct mbuf *m, int mcast) 3570 { 3571 struct ieee80211vap *vap = ni->ni_vap; 3572 struct ieee80211_beacon_offsets *bo = &vap->iv_bcn_off; 3573 struct ieee80211com *ic = ni->ni_ic; 3574 int len_changed = 0; 3575 uint16_t capinfo; 3576 struct ieee80211_frame *wh; 3577 ieee80211_seq seqno; 3578 3579 IEEE80211_LOCK(ic); 3580 /* 3581 * Handle 11h channel change when we've reached the count. 3582 * We must recalculate the beacon frame contents to account 3583 * for the new channel. Note we do this only for the first 3584 * vap that reaches this point; subsequent vaps just update 3585 * their beacon state to reflect the recalculated channel. 3586 */ 3587 if (isset(bo->bo_flags, IEEE80211_BEACON_CSA) && 3588 vap->iv_csa_count == ic->ic_csa_count) { 3589 vap->iv_csa_count = 0; 3590 /* 3591 * Effect channel change before reconstructing the beacon 3592 * frame contents as many places reference ni_chan. 3593 */ 3594 if (ic->ic_csa_newchan != NULL) 3595 ieee80211_csa_completeswitch(ic); 3596 /* 3597 * NB: ieee80211_beacon_construct clears all pending 3598 * updates in bo_flags so we don't need to explicitly 3599 * clear IEEE80211_BEACON_CSA. 3600 */ 3601 ieee80211_beacon_construct(m, 3602 mtod(m, uint8_t*) + sizeof(struct ieee80211_frame), ni); 3603 3604 /* XXX do WME aggressive mode processing? */ 3605 IEEE80211_UNLOCK(ic); 3606 return 1; /* just assume length changed */ 3607 } 3608 3609 /* 3610 * Handle the quiet time element being added and removed. 3611 * Again, for now we just cheat and reconstruct the whole 3612 * beacon - that way the gap is provided as appropriate. 3613 * 3614 * So, track whether we have already added the IE versus 3615 * whether we want to be adding the IE. 3616 */ 3617 if ((vap->iv_flags_ext & IEEE80211_FEXT_QUIET_IE) && 3618 (vap->iv_quiet == 0)) { 3619 /* 3620 * Quiet time beacon IE enabled, but it's disabled; 3621 * recalc 3622 */ 3623 vap->iv_flags_ext &= ~IEEE80211_FEXT_QUIET_IE; 3624 ieee80211_beacon_construct(m, 3625 mtod(m, uint8_t*) + sizeof(struct ieee80211_frame), ni); 3626 /* XXX do WME aggressive mode processing? */ 3627 IEEE80211_UNLOCK(ic); 3628 return 1; /* just assume length changed */ 3629 } 3630 3631 if (((vap->iv_flags_ext & IEEE80211_FEXT_QUIET_IE) == 0) && 3632 (vap->iv_quiet == 1)) { 3633 /* 3634 * Quiet time beacon IE disabled, but it's now enabled; 3635 * recalc 3636 */ 3637 vap->iv_flags_ext |= IEEE80211_FEXT_QUIET_IE; 3638 ieee80211_beacon_construct(m, 3639 mtod(m, uint8_t*) + sizeof(struct ieee80211_frame), ni); 3640 /* XXX do WME aggressive mode processing? */ 3641 IEEE80211_UNLOCK(ic); 3642 return 1; /* just assume length changed */ 3643 } 3644 3645 wh = mtod(m, struct ieee80211_frame *); 3646 3647 /* 3648 * XXX TODO Strictly speaking this should be incremented with the TX 3649 * lock held so as to serialise access to the non-qos TID sequence 3650 * number space. 3651 * 3652 * If the driver identifies it does its own TX seqno management then 3653 * we can skip this (and still not do the TX seqno.) 3654 */ 3655 seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]++; 3656 *(uint16_t *)&wh->i_seq[0] = 3657 htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); 3658 M_SEQNO_SET(m, seqno); 3659 3660 /* XXX faster to recalculate entirely or just changes? */ 3661 capinfo = ieee80211_getcapinfo(vap, ni->ni_chan); 3662 *bo->bo_caps = htole16(capinfo); 3663 3664 if (vap->iv_flags & IEEE80211_F_WME) { 3665 struct ieee80211_wme_state *wme = &ic->ic_wme; 3666 3667 /* 3668 * Check for aggressive mode change. When there is 3669 * significant high priority traffic in the BSS 3670 * throttle back BE traffic by using conservative 3671 * parameters. Otherwise BE uses aggressive params 3672 * to optimize performance of legacy/non-QoS traffic. 3673 */ 3674 if (wme->wme_flags & WME_F_AGGRMODE) { 3675 if (wme->wme_hipri_traffic > 3676 wme->wme_hipri_switch_thresh) { 3677 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 3678 "%s: traffic %u, disable aggressive mode\n", 3679 __func__, wme->wme_hipri_traffic); 3680 wme->wme_flags &= ~WME_F_AGGRMODE; 3681 ieee80211_wme_updateparams_locked(vap); 3682 wme->wme_hipri_traffic = 3683 wme->wme_hipri_switch_hysteresis; 3684 } else 3685 wme->wme_hipri_traffic = 0; 3686 } else { 3687 if (wme->wme_hipri_traffic <= 3688 wme->wme_hipri_switch_thresh) { 3689 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 3690 "%s: traffic %u, enable aggressive mode\n", 3691 __func__, wme->wme_hipri_traffic); 3692 wme->wme_flags |= WME_F_AGGRMODE; 3693 ieee80211_wme_updateparams_locked(vap); 3694 wme->wme_hipri_traffic = 0; 3695 } else 3696 wme->wme_hipri_traffic = 3697 wme->wme_hipri_switch_hysteresis; 3698 } 3699 if (isset(bo->bo_flags, IEEE80211_BEACON_WME)) { 3700 (void) ieee80211_add_wme_param(bo->bo_wme, wme); 3701 clrbit(bo->bo_flags, IEEE80211_BEACON_WME); 3702 } 3703 } 3704 3705 if (isset(bo->bo_flags, IEEE80211_BEACON_HTINFO)) { 3706 ieee80211_ht_update_beacon(vap, bo); 3707 clrbit(bo->bo_flags, IEEE80211_BEACON_HTINFO); 3708 } 3709 #ifdef IEEE80211_SUPPORT_TDMA 3710 if (vap->iv_caps & IEEE80211_C_TDMA) { 3711 /* 3712 * NB: the beacon is potentially updated every TBTT. 3713 */ 3714 ieee80211_tdma_update_beacon(vap, bo); 3715 } 3716 #endif 3717 #ifdef IEEE80211_SUPPORT_MESH 3718 if (vap->iv_opmode == IEEE80211_M_MBSS) 3719 ieee80211_mesh_update_beacon(vap, bo); 3720 #endif 3721 3722 if (vap->iv_opmode == IEEE80211_M_HOSTAP || 3723 vap->iv_opmode == IEEE80211_M_MBSS) { /* NB: no IBSS support*/ 3724 struct ieee80211_tim_ie *tie = 3725 (struct ieee80211_tim_ie *) bo->bo_tim; 3726 if (isset(bo->bo_flags, IEEE80211_BEACON_TIM)) { 3727 u_int timlen, timoff, i; 3728 /* 3729 * ATIM/DTIM needs updating. If it fits in the 3730 * current space allocated then just copy in the 3731 * new bits. Otherwise we need to move any trailing 3732 * data to make room. Note that we know there is 3733 * contiguous space because ieee80211_beacon_allocate 3734 * insures there is space in the mbuf to write a 3735 * maximal-size virtual bitmap (based on iv_max_aid). 3736 */ 3737 /* 3738 * Calculate the bitmap size and offset, copy any 3739 * trailer out of the way, and then copy in the 3740 * new bitmap and update the information element. 3741 * Note that the tim bitmap must contain at least 3742 * one byte and any offset must be even. 3743 */ 3744 if (vap->iv_ps_pending != 0) { 3745 timoff = 128; /* impossibly large */ 3746 for (i = 0; i < vap->iv_tim_len; i++) 3747 if (vap->iv_tim_bitmap[i]) { 3748 timoff = i &~ 1; 3749 break; 3750 } 3751 KASSERT(timoff != 128, ("tim bitmap empty!")); 3752 for (i = vap->iv_tim_len-1; i >= timoff; i--) 3753 if (vap->iv_tim_bitmap[i]) 3754 break; 3755 timlen = 1 + (i - timoff); 3756 } else { 3757 timoff = 0; 3758 timlen = 1; 3759 } 3760 3761 /* 3762 * TODO: validate this! 3763 */ 3764 if (timlen != bo->bo_tim_len) { 3765 /* copy up/down trailer */ 3766 int adjust = tie->tim_bitmap+timlen 3767 - bo->bo_tim_trailer; 3768 ovbcopy(bo->bo_tim_trailer, 3769 bo->bo_tim_trailer+adjust, 3770 bo->bo_tim_trailer_len); 3771 bo->bo_tim_trailer += adjust; 3772 bo->bo_erp += adjust; 3773 bo->bo_htinfo += adjust; 3774 bo->bo_vhtinfo += adjust; 3775 #ifdef IEEE80211_SUPPORT_SUPERG 3776 bo->bo_ath += adjust; 3777 #endif 3778 #ifdef IEEE80211_SUPPORT_TDMA 3779 bo->bo_tdma += adjust; 3780 #endif 3781 #ifdef IEEE80211_SUPPORT_MESH 3782 bo->bo_meshconf += adjust; 3783 #endif 3784 bo->bo_appie += adjust; 3785 bo->bo_wme += adjust; 3786 bo->bo_csa += adjust; 3787 bo->bo_quiet += adjust; 3788 bo->bo_tim_len = timlen; 3789 3790 /* update information element */ 3791 tie->tim_len = 3 + timlen; 3792 tie->tim_bitctl = timoff; 3793 len_changed = 1; 3794 } 3795 memcpy(tie->tim_bitmap, vap->iv_tim_bitmap + timoff, 3796 bo->bo_tim_len); 3797 3798 clrbit(bo->bo_flags, IEEE80211_BEACON_TIM); 3799 3800 IEEE80211_DPRINTF(vap, IEEE80211_MSG_POWER, 3801 "%s: TIM updated, pending %u, off %u, len %u\n", 3802 __func__, vap->iv_ps_pending, timoff, timlen); 3803 } 3804 /* count down DTIM period */ 3805 if (tie->tim_count == 0) 3806 tie->tim_count = tie->tim_period - 1; 3807 else 3808 tie->tim_count--; 3809 /* update state for buffered multicast frames on DTIM */ 3810 if (mcast && tie->tim_count == 0) 3811 tie->tim_bitctl |= 1; 3812 else 3813 tie->tim_bitctl &= ~1; 3814 if (isset(bo->bo_flags, IEEE80211_BEACON_CSA)) { 3815 struct ieee80211_csa_ie *csa = 3816 (struct ieee80211_csa_ie *) bo->bo_csa; 3817 3818 /* 3819 * Insert or update CSA ie. If we're just starting 3820 * to count down to the channel switch then we need 3821 * to insert the CSA ie. Otherwise we just need to 3822 * drop the count. The actual change happens above 3823 * when the vap's count reaches the target count. 3824 */ 3825 if (vap->iv_csa_count == 0) { 3826 memmove(&csa[1], csa, bo->bo_csa_trailer_len); 3827 bo->bo_erp += sizeof(*csa); 3828 bo->bo_htinfo += sizeof(*csa); 3829 bo->bo_vhtinfo += sizeof(*csa); 3830 bo->bo_wme += sizeof(*csa); 3831 #ifdef IEEE80211_SUPPORT_SUPERG 3832 bo->bo_ath += sizeof(*csa); 3833 #endif 3834 #ifdef IEEE80211_SUPPORT_TDMA 3835 bo->bo_tdma += sizeof(*csa); 3836 #endif 3837 #ifdef IEEE80211_SUPPORT_MESH 3838 bo->bo_meshconf += sizeof(*csa); 3839 #endif 3840 bo->bo_appie += sizeof(*csa); 3841 bo->bo_csa_trailer_len += sizeof(*csa); 3842 bo->bo_quiet += sizeof(*csa); 3843 bo->bo_tim_trailer_len += sizeof(*csa); 3844 m->m_len += sizeof(*csa); 3845 m->m_pkthdr.len += sizeof(*csa); 3846 3847 ieee80211_add_csa(bo->bo_csa, vap); 3848 } else 3849 csa->csa_count--; 3850 vap->iv_csa_count++; 3851 /* NB: don't clear IEEE80211_BEACON_CSA */ 3852 } 3853 3854 /* 3855 * Only add the quiet time IE if we've enabled it 3856 * as appropriate. 3857 */ 3858 if (IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) && 3859 (vap->iv_flags_ext & IEEE80211_FEXT_DFS)) { 3860 if (vap->iv_quiet && 3861 (vap->iv_flags_ext & IEEE80211_FEXT_QUIET_IE)) { 3862 ieee80211_add_quiet(bo->bo_quiet, vap, 1); 3863 } 3864 } 3865 if (isset(bo->bo_flags, IEEE80211_BEACON_ERP)) { 3866 /* 3867 * ERP element needs updating. 3868 */ 3869 (void) ieee80211_add_erp(bo->bo_erp, ic); 3870 clrbit(bo->bo_flags, IEEE80211_BEACON_ERP); 3871 } 3872 #ifdef IEEE80211_SUPPORT_SUPERG 3873 if (isset(bo->bo_flags, IEEE80211_BEACON_ATH)) { 3874 ieee80211_add_athcaps(bo->bo_ath, ni); 3875 clrbit(bo->bo_flags, IEEE80211_BEACON_ATH); 3876 } 3877 #endif 3878 } 3879 if (isset(bo->bo_flags, IEEE80211_BEACON_APPIE)) { 3880 const struct ieee80211_appie *aie = vap->iv_appie_beacon; 3881 int aielen; 3882 uint8_t *frm; 3883 3884 aielen = 0; 3885 if (aie != NULL) 3886 aielen += aie->ie_len; 3887 if (aielen != bo->bo_appie_len) { 3888 /* copy up/down trailer */ 3889 int adjust = aielen - bo->bo_appie_len; 3890 ovbcopy(bo->bo_tim_trailer, bo->bo_tim_trailer+adjust, 3891 bo->bo_tim_trailer_len); 3892 bo->bo_tim_trailer += adjust; 3893 bo->bo_appie += adjust; 3894 bo->bo_appie_len = aielen; 3895 3896 len_changed = 1; 3897 } 3898 frm = bo->bo_appie; 3899 if (aie != NULL) 3900 frm = add_appie(frm, aie); 3901 clrbit(bo->bo_flags, IEEE80211_BEACON_APPIE); 3902 } 3903 IEEE80211_UNLOCK(ic); 3904 3905 return len_changed; 3906 } 3907 3908 /* 3909 * Do Ethernet-LLC encapsulation for each payload in a fast frame 3910 * tunnel encapsulation. The frame is assumed to have an Ethernet 3911 * header at the front that must be stripped before prepending the 3912 * LLC followed by the Ethernet header passed in (with an Ethernet 3913 * type that specifies the payload size). 3914 */ 3915 struct mbuf * 3916 ieee80211_ff_encap1(struct ieee80211vap *vap, struct mbuf *m, 3917 const struct ether_header *eh) 3918 { 3919 struct llc *llc; 3920 uint16_t payload; 3921 3922 /* XXX optimize by combining m_adj+M_PREPEND */ 3923 m_adj(m, sizeof(struct ether_header) - sizeof(struct llc)); 3924 llc = mtod(m, struct llc *); 3925 llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP; 3926 llc->llc_control = LLC_UI; 3927 llc->llc_snap.org_code[0] = 0; 3928 llc->llc_snap.org_code[1] = 0; 3929 llc->llc_snap.org_code[2] = 0; 3930 llc->llc_snap.ether_type = eh->ether_type; 3931 payload = m->m_pkthdr.len; /* NB: w/o Ethernet header */ 3932 3933 M_PREPEND(m, sizeof(struct ether_header), M_NOWAIT); 3934 if (m == NULL) { /* XXX cannot happen */ 3935 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG, 3936 "%s: no space for ether_header\n", __func__); 3937 vap->iv_stats.is_tx_nobuf++; 3938 return NULL; 3939 } 3940 ETHER_HEADER_COPY(mtod(m, void *), eh); 3941 mtod(m, struct ether_header *)->ether_type = htons(payload); 3942 return m; 3943 } 3944 3945 /* 3946 * Complete an mbuf transmission. 3947 * 3948 * For now, this simply processes a completed frame after the 3949 * driver has completed it's transmission and/or retransmission. 3950 * It assumes the frame is an 802.11 encapsulated frame. 3951 * 3952 * Later on it will grow to become the exit path for a given frame 3953 * from the driver and, depending upon how it's been encapsulated 3954 * and already transmitted, it may end up doing A-MPDU retransmission, 3955 * power save requeuing, etc. 3956 * 3957 * In order for the above to work, the driver entry point to this 3958 * must not hold any driver locks. Thus, the driver needs to delay 3959 * any actual mbuf completion until it can release said locks. 3960 * 3961 * This frees the mbuf and if the mbuf has a node reference, 3962 * the node reference will be freed. 3963 */ 3964 void 3965 ieee80211_tx_complete(struct ieee80211_node *ni, struct mbuf *m, int status) 3966 { 3967 3968 if (ni != NULL) { 3969 struct ifnet *ifp = ni->ni_vap->iv_ifp; 3970 3971 if (status == 0) { 3972 if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len); 3973 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1); 3974 if (m->m_flags & M_MCAST) 3975 if_inc_counter(ifp, IFCOUNTER_OMCASTS, 1); 3976 } else 3977 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 3978 if (m->m_flags & M_TXCB) 3979 ieee80211_process_callback(ni, m, status); 3980 ieee80211_free_node(ni); 3981 } 3982 m_freem(m); 3983 } 3984
Indexes created Fri Sep 26 20:09:58 GMT 2025