1 /*- 2 * Copyright (c) 2001 Atsushi Onoe 3 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include "opt_inet.h" 31 #include "opt_inet6.h" 32 #include "opt_wlan.h" 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/mbuf.h> 37 #include <sys/kernel.h> 38 #include <sys/endian.h> 39 40 #include <sys/socket.h> 41 42 #include <net/bpf.h> 43 #include <net/ethernet.h> 44 #include <net/if.h> 45 #include <net/if_var.h> 46 #include <net/if_llc.h> 47 #include <net/if_media.h> 48 #include <net/vlan/if_vlan_var.h> 49 50 #if defined(__DragonFly__) 51 #include <net/ifq_var.h> 52 #endif 53 54 #include <netproto/802_11/ieee80211_var.h> 55 #include <netproto/802_11/ieee80211_regdomain.h> 56 #ifdef IEEE80211_SUPPORT_SUPERG 57 #include <netproto/802_11/ieee80211_superg.h> 58 #endif 59 #ifdef IEEE80211_SUPPORT_TDMA 60 #include <netproto/802_11/ieee80211_tdma.h> 61 #endif 62 #include <netproto/802_11/ieee80211_wds.h> 63 #include <netproto/802_11/ieee80211_mesh.h> 64 65 #if defined(INET) || defined(INET6) 66 #include <netinet/in.h> 67 #endif 68 69 #ifdef INET 70 #include <netinet/if_ether.h> 71 #include <netinet/in_systm.h> 72 #include <netinet/ip.h> 73 #endif 74 #ifdef INET6 75 #include <netinet/ip6.h> 76 #endif 77 78 /*#include <security/mac/mac_framework.h>*/ 79 80 #define ETHER_HEADER_COPY(dst, src) \ 81 memcpy(dst, src, sizeof(struct ether_header)) 82 83 /* unalligned little endian access */ 84 #define LE_WRITE_2(p, v) do { \ 85 ((uint8_t *)(p))[0] = (v) & 0xff; \ 86 ((uint8_t *)(p))[1] = ((v) >> 8) & 0xff; \ 87 } while (0) 88 #define LE_WRITE_4(p, v) do { \ 89 ((uint8_t *)(p))[0] = (v) & 0xff; \ 90 ((uint8_t *)(p))[1] = ((v) >> 8) & 0xff; \ 91 ((uint8_t *)(p))[2] = ((v) >> 16) & 0xff; \ 92 ((uint8_t *)(p))[3] = ((v) >> 24) & 0xff; \ 93 } while (0) 94 95 static int ieee80211_fragment(struct ieee80211vap *, struct mbuf *, 96 u_int hdrsize, u_int ciphdrsize, u_int mtu); 97 static void ieee80211_tx_mgt_cb(struct ieee80211_node *, void *, int); 98 99 #ifdef IEEE80211_DEBUG 100 /* 101 * Decide if an outbound management frame should be 102 * printed when debugging is enabled. This filters some 103 * of the less interesting frames that come frequently 104 * (e.g. beacons). 105 */ 106 static __inline int 107 doprint(struct ieee80211vap *vap, int subtype) 108 { 109 switch (subtype) { 110 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 111 return (vap->iv_opmode == IEEE80211_M_IBSS); 112 } 113 return 1; 114 } 115 #endif 116 117 /* 118 * Transmit a frame to the given destination on the given VAP. 119 * 120 * It's up to the caller to figure out the details of who this 121 * is going to and resolving the node. 122 * 123 * This routine takes care of queuing it for power save, 124 * A-MPDU state stuff, fast-frames state stuff, encapsulation 125 * if required, then passing it up to the driver layer. 126 * 127 * This routine (for now) consumes the mbuf and frees the node 128 * reference; it ideally will return a TX status which reflects 129 * whether the mbuf was consumed or not, so the caller can 130 * free the mbuf (if appropriate) and the node reference (again, 131 * if appropriate.) 132 */ 133 int 134 ieee80211_vap_pkt_send_dest(struct ieee80211vap *vap, struct mbuf *m, 135 struct ieee80211_node *ni) 136 { 137 struct ieee80211com *ic = vap->iv_ic; 138 struct ifnet *ifp = vap->iv_ifp; 139 int error; 140 141 if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) && 142 (m->m_flags & M_PWR_SAV) == 0) { 143 /* 144 * Station in power save mode; pass the frame 145 * to the 802.11 layer and continue. We'll get 146 * the frame back when the time is right. 147 * XXX lose WDS vap linkage? 148 */ 149 (void) ieee80211_pwrsave(ni, m); 150 ieee80211_free_node(ni); 151 152 /* 153 * We queued it fine, so tell the upper layer 154 * that we consumed it. 155 */ 156 return (0); 157 } 158 /* calculate priority so drivers can find the tx queue */ 159 if (ieee80211_classify(ni, m)) { 160 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_OUTPUT, 161 ni->ni_macaddr, NULL, 162 "%s", "classification failure"); 163 vap->iv_stats.is_tx_classify++; 164 IFNET_STAT_INC(ifp, oerrors, 1); 165 m_freem(m); 166 ieee80211_free_node(ni); 167 168 /* XXX better status? */ 169 return (0); 170 } 171 /* 172 * Stash the node pointer. Note that we do this after 173 * any call to ieee80211_dwds_mcast because that code 174 * uses any existing value for rcvif to identify the 175 * interface it (might have been) received on. 176 */ 177 m->m_pkthdr.rcvif = (void *)ni; 178 179 BPF_MTAP(ifp, m); /* 802.3 tx */ 180 181 /* 182 * Check if A-MPDU tx aggregation is setup or if we 183 * should try to enable it. The sta must be associated 184 * with HT and A-MPDU enabled for use. When the policy 185 * routine decides we should enable A-MPDU we issue an 186 * ADDBA request and wait for a reply. The frame being 187 * encapsulated will go out w/o using A-MPDU, or possibly 188 * it might be collected by the driver and held/retransmit. 189 * The default ic_ampdu_enable routine handles staggering 190 * ADDBA requests in case the receiver NAK's us or we are 191 * otherwise unable to establish a BA stream. 192 */ 193 if ((ni->ni_flags & IEEE80211_NODE_AMPDU_TX) && 194 (vap->iv_flags_ht & IEEE80211_FHT_AMPDU_TX) && 195 (m->m_flags & M_EAPOL) == 0) { 196 int tid = WME_AC_TO_TID(M_WME_GETAC(m)); 197 struct ieee80211_tx_ampdu *tap = &ni->ni_tx_ampdu[tid]; 198 199 ieee80211_txampdu_count_packet(tap); 200 if (IEEE80211_AMPDU_RUNNING(tap)) { 201 /* 202 * Operational, mark frame for aggregation. 203 * 204 * XXX do tx aggregation here 205 */ 206 m->m_flags |= M_AMPDU_MPDU; 207 } else if (!IEEE80211_AMPDU_REQUESTED(tap) && 208 ic->ic_ampdu_enable(ni, tap)) { 209 /* 210 * Not negotiated yet, request service. 211 */ 212 ieee80211_ampdu_request(ni, tap); 213 /* XXX hold frame for reply? */ 214 } 215 } 216 217 #ifdef IEEE80211_SUPPORT_SUPERG 218 else if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF)) { 219 m = ieee80211_ff_check(ni, m); 220 if (m == NULL) { 221 /* NB: any ni ref held on stageq */ 222 return (0); 223 } 224 } 225 #endif /* IEEE80211_SUPPORT_SUPERG */ 226 227 /* 228 * Grab the TX lock - serialise the TX process from this 229 * point (where TX state is being checked/modified) 230 * through to driver queue. 231 */ 232 IEEE80211_TX_LOCK(ic); 233 234 if (__predict_true((vap->iv_caps & IEEE80211_C_8023ENCAP) == 0)) { 235 /* 236 * Encapsulate the packet in prep for transmission. 237 */ 238 m = ieee80211_encap(vap, ni, m); 239 if (m == NULL) { 240 /* NB: stat+msg handled in ieee80211_encap */ 241 IEEE80211_TX_UNLOCK(ic); 242 ieee80211_free_node(ni); 243 /* XXX better status? */ 244 return (ENOBUFS); 245 } 246 } 247 error = ieee80211_parent_xmitpkt(ic, m); 248 249 /* 250 * Unlock at this point - no need to hold it across 251 * ieee80211_free_node() (ie, the comlock) 252 */ 253 IEEE80211_TX_UNLOCK(ic); 254 if (error != 0) { 255 /* NB: IFQ_HANDOFF reclaims mbuf */ 256 ieee80211_free_node(ni); 257 } else { 258 IFNET_STAT_INC(ifp, opackets, 1); 259 } 260 ic->ic_lastdata = ticks; 261 262 return (0); 263 } 264 265 266 267 /* 268 * Send the given mbuf through the given vap. 269 * 270 * This consumes the mbuf regardless of whether the transmit 271 * was successful or not. 272 * 273 * This does none of the initial checks that ieee80211_start() 274 * does (eg CAC timeout, interface wakeup) - the caller must 275 * do this first. 276 */ 277 static int 278 ieee80211_start_pkt(struct ieee80211vap *vap, struct mbuf *m) 279 { 280 #define IS_DWDS(vap) \ 281 (vap->iv_opmode == IEEE80211_M_WDS && \ 282 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) == 0) 283 struct ieee80211com *ic = vap->iv_ic; 284 struct ifnet *ifp = vap->iv_ifp; 285 struct ieee80211_node *ni; 286 struct ether_header *eh; 287 288 /* 289 * Cancel any background scan. 290 */ 291 if (ic->ic_flags & IEEE80211_F_SCAN) 292 ieee80211_cancel_anyscan(vap); 293 /* 294 * Find the node for the destination so we can do 295 * things like power save and fast frames aggregation. 296 * 297 * NB: past this point various code assumes the first 298 * mbuf has the 802.3 header present (and contiguous). 299 */ 300 ni = NULL; 301 if (m->m_len < sizeof(struct ether_header) && 302 (m = m_pullup(m, sizeof(struct ether_header))) == NULL) { 303 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 304 "discard frame, %s\n", "m_pullup failed"); 305 vap->iv_stats.is_tx_nobuf++; /* XXX */ 306 IFNET_STAT_INC(ifp, oerrors, 1); 307 return (ENOBUFS); 308 } 309 eh = mtod(m, struct ether_header *); 310 if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 311 if (IS_DWDS(vap)) { 312 /* 313 * Only unicast frames from the above go out 314 * DWDS vaps; multicast frames are handled by 315 * dispatching the frame as it comes through 316 * the AP vap (see below). 317 */ 318 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_WDS, 319 eh->ether_dhost, "mcast", "%s", "on DWDS"); 320 vap->iv_stats.is_dwds_mcast++; 321 m_freem(m); 322 /* XXX better status? */ 323 return (ENOBUFS); 324 } 325 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 326 /* 327 * Spam DWDS vap's w/ multicast traffic. 328 */ 329 /* XXX only if dwds in use? */ 330 ieee80211_dwds_mcast(vap, m); 331 } 332 } 333 #ifdef IEEE80211_SUPPORT_MESH 334 if (vap->iv_opmode != IEEE80211_M_MBSS) { 335 #endif 336 ni = ieee80211_find_txnode(vap, eh->ether_dhost); 337 if (ni == NULL) { 338 /* NB: ieee80211_find_txnode does stat+msg */ 339 IFNET_STAT_INC(ifp, oerrors, 1); 340 m_freem(m); 341 /* XXX better status? */ 342 return (ENOBUFS); 343 } 344 if (ni->ni_associd == 0 && 345 (ni->ni_flags & IEEE80211_NODE_ASSOCID)) { 346 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_OUTPUT, 347 eh->ether_dhost, NULL, 348 "sta not associated (type 0x%04x)", 349 htons(eh->ether_type)); 350 vap->iv_stats.is_tx_notassoc++; 351 IFNET_STAT_INC(ifp, oerrors, 1); 352 m_freem(m); 353 ieee80211_free_node(ni); 354 /* XXX better status? */ 355 return (ENOBUFS); 356 } 357 #ifdef IEEE80211_SUPPORT_MESH 358 } else { 359 if (!IEEE80211_ADDR_EQ(eh->ether_shost, vap->iv_myaddr)) { 360 /* 361 * Proxy station only if configured. 362 */ 363 if (!ieee80211_mesh_isproxyena(vap)) { 364 IEEE80211_DISCARD_MAC(vap, 365 IEEE80211_MSG_OUTPUT | 366 IEEE80211_MSG_MESH, 367 eh->ether_dhost, NULL, 368 "%s", "proxy not enabled"); 369 vap->iv_stats.is_mesh_notproxy++; 370 IFNET_STAT_INC(ifp, oerrors, 1); 371 m_freem(m); 372 /* XXX better status? */ 373 return (ENOBUFS); 374 } 375 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 376 "forward frame from DS SA(%s), DA(%s)\n", 377 ether_sprintf(eh->ether_shost), 378 ether_sprintf(eh->ether_dhost)); 379 ieee80211_mesh_proxy_check(vap, eh->ether_shost); 380 } 381 ni = ieee80211_mesh_discover(vap, eh->ether_dhost, m); 382 if (ni == NULL) { 383 /* 384 * NB: ieee80211_mesh_discover holds/disposes 385 * frame (e.g. queueing on path discovery). 386 */ 387 IFNET_STAT_INC(ifp, oerrors, 1); 388 /* XXX better status? */ 389 return (ENOBUFS); 390 } 391 } 392 #endif 393 394 /* 395 * We've resolved the sender, so attempt to transmit it. 396 */ 397 398 if (vap->iv_state == IEEE80211_S_SLEEP) { 399 /* 400 * In power save; queue frame and then wakeup device 401 * for transmit. 402 */ 403 ic->ic_lastdata = ticks; 404 (void) ieee80211_pwrsave(ni, m); 405 ieee80211_free_node(ni); 406 ieee80211_new_state(vap, IEEE80211_S_RUN, 0); 407 return (0); 408 } 409 410 if (ieee80211_vap_pkt_send_dest(vap, m, ni) != 0) 411 return (ENOBUFS); 412 return (0); 413 #undef IS_DWDS 414 } 415 416 /* 417 * Start method for vap's. All packets from the stack come 418 * through here. We handle common processing of the packets 419 * before dispatching them to the underlying device. 420 * 421 * if_transmit() requires that the mbuf be consumed by this call 422 * regardless of the return condition. 423 */ 424 425 #if defined(__DragonFly__) 426 427 void 428 ieee80211_vap_start(struct ifnet *ifp, struct ifaltq_subque *ifsq) 429 { 430 struct ieee80211vap *vap = ifp->if_softc; 431 struct ieee80211com *ic = vap->iv_ic; 432 struct ifnet *parent = ic->ic_ifp; 433 struct mbuf *m = NULL; 434 435 /* NB: parent must be up and running */ 436 if (!IFNET_IS_UP_RUNNING(parent)) { 437 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 438 "%s: ignore queue, parent %s not up+running\n", 439 __func__, parent->if_xname); 440 /* XXX stat */ 441 /*m_freem(m);*/ 442 /*return (EINVAL);*/ 443 return; 444 } 445 446 wlan_assert_serialized(); 447 ASSERT_ALTQ_SQ_DEFAULT(ifp, ifsq); 448 449 /* 450 * No data frames go out unless we're running. 451 * Note in particular this covers CAC and CSA 452 * states (though maybe we should check muting 453 * for CSA). 454 */ 455 if (vap->iv_state != IEEE80211_S_RUN && 456 vap->iv_state != IEEE80211_S_SLEEP) { 457 IEEE80211_LOCK(ic); 458 /* re-check under the com lock to avoid races */ 459 if (vap->iv_state != IEEE80211_S_RUN && 460 vap->iv_state != IEEE80211_S_SLEEP) { 461 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 462 "%s: ignore queue, in %s state\n", 463 __func__, ieee80211_state_name[vap->iv_state]); 464 vap->iv_stats.is_tx_badstate++; 465 IEEE80211_UNLOCK(ic); 466 ifsq_set_oactive(ifsq); 467 /*m_freem(m);*/ 468 /* return (EINVAL); */ 469 return; 470 } 471 IEEE80211_UNLOCK(ic); 472 } 473 474 wlan_serialize_exit(); 475 for (;;) { 476 m = ifsq_dequeue(ifsq); 477 if (m == NULL) 478 break; 479 480 /* 481 * Sanitize mbuf flags for net80211 use. We cannot 482 * clear M_PWR_SAV or M_MORE_DATA because these may 483 * be set for frames that are re-submitted from the 484 * power save queue. 485 * 486 * NB: This must be done before ieee80211_classify as 487 * it marks EAPOL in frames with M_EAPOL. 488 */ 489 m->m_flags &= ~(M_80211_TX - M_PWR_SAV - M_MORE_DATA); 490 491 /* 492 * Bump to the packet transmission path. 493 * The mbuf will be consumed here. 494 */ 495 ieee80211_start_pkt(vap, m); 496 } 497 wlan_serialize_enter(); 498 } 499 500 #else 501 502 int 503 ieee80211_vap_transmit(struct ifnet *ifp, struct mbuf *m) 504 { 505 struct ieee80211vap *vap = ifp->if_softc; 506 struct ieee80211com *ic = vap->iv_ic; 507 struct ifnet *parent = ic->ic_ifp; 508 509 /* NB: parent must be up and running */ 510 if (!IFNET_IS_UP_RUNNING(parent)) { 511 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 512 "%s: ignore queue, parent %s not up+running\n", 513 __func__, parent->if_xname); 514 /* XXX stat */ 515 m_freem(m); 516 return (EINVAL); 517 } 518 519 /* 520 * No data frames go out unless we're running. 521 * Note in particular this covers CAC and CSA 522 * states (though maybe we should check muting 523 * for CSA). 524 */ 525 if (vap->iv_state != IEEE80211_S_RUN && 526 vap->iv_state != IEEE80211_S_SLEEP) { 527 IEEE80211_LOCK(ic); 528 /* re-check under the com lock to avoid races */ 529 if (vap->iv_state != IEEE80211_S_RUN && 530 vap->iv_state != IEEE80211_S_SLEEP) { 531 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 532 "%s: ignore queue, in %s state\n", 533 __func__, ieee80211_state_name[vap->iv_state]); 534 vap->iv_stats.is_tx_badstate++; 535 IEEE80211_UNLOCK(ic); 536 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 537 m_freem(m); 538 return (EINVAL); 539 } 540 IEEE80211_UNLOCK(ic); 541 } 542 543 /* 544 * Sanitize mbuf flags for net80211 use. We cannot 545 * clear M_PWR_SAV or M_MORE_DATA because these may 546 * be set for frames that are re-submitted from the 547 * power save queue. 548 * 549 * NB: This must be done before ieee80211_classify as 550 * it marks EAPOL in frames with M_EAPOL. 551 */ 552 m->m_flags &= ~(M_80211_TX - M_PWR_SAV - M_MORE_DATA); 553 554 /* 555 * Bump to the packet transmission path. 556 * The mbuf will be consumed here. 557 */ 558 return (ieee80211_start_pkt(vap, m)); 559 } 560 561 void 562 ieee80211_vap_qflush(struct ifnet *ifp) 563 { 564 565 /* Empty for now */ 566 } 567 568 #endif 569 570 /* 571 * 802.11 raw output routine. 572 * 573 * XXX TODO: this (and other send routines) should correctly 574 * XXX keep the pwr mgmt bit set if it decides to call into the 575 * XXX driver to send a frame whilst the state is SLEEP. 576 * 577 * Otherwise the peer may decide that we're awake and flood us 578 * with traffic we are still too asleep to receive! 579 */ 580 int 581 ieee80211_raw_output(struct ieee80211vap *vap, struct ieee80211_node *ni, 582 struct mbuf *m, const struct ieee80211_bpf_params *params) 583 { 584 struct ieee80211com *ic = vap->iv_ic; 585 586 return (ic->ic_raw_xmit(ni, m, params)); 587 } 588 589 /* 590 * 802.11 output routine. This is (currently) used only to 591 * connect bpf write calls to the 802.11 layer for injecting 592 * raw 802.11 frames. 593 */ 594 #if defined(__DragonFly__) 595 int 596 ieee80211_output(struct ifnet *ifp, struct mbuf *m, 597 struct sockaddr *dst, struct rtentry *rt) 598 #else 599 int 600 ieee80211_output(struct ifnet *ifp, struct mbuf *m, 601 const struct sockaddr *dst, struct route *ro) 602 #endif 603 { 604 #define senderr(e) do { error = (e); goto bad;} while (0) 605 struct ieee80211_node *ni = NULL; 606 struct ieee80211vap *vap; 607 struct ieee80211_frame *wh; 608 struct ieee80211com *ic = NULL; 609 int error; 610 int ret; 611 612 #if defined(__DragonFly__) 613 struct ifaltq_subque *ifsq; 614 ifsq = ifq_get_subq_default(&ifp->if_snd); 615 if (ifsq_is_oactive(ifsq)) 616 #else 617 if (ifp->if_drv_flags & IFF_DRV_OACTIVE) 618 #endif 619 { 620 /* 621 * Short-circuit requests if the vap is marked OACTIVE 622 * as this can happen because a packet came down through 623 * ieee80211_start before the vap entered RUN state in 624 * which case it's ok to just drop the frame. This 625 * should not be necessary but callers of if_output don't 626 * check OACTIVE. 627 */ 628 senderr(ENETDOWN); 629 } 630 vap = ifp->if_softc; 631 ic = vap->iv_ic; 632 /* 633 * Hand to the 802.3 code if not tagged as 634 * a raw 802.11 frame. 635 */ 636 #if defined(__DragonFly__) 637 if (dst->sa_family != AF_IEEE80211) 638 return vap->iv_output(ifp, m, dst, rt); 639 #else 640 if (dst->sa_family != AF_IEEE80211) 641 return vap->iv_output(ifp, m, dst, ro); 642 #endif 643 #ifdef MAC 644 error = mac_ifnet_check_transmit(ifp, m); 645 if (error) 646 senderr(error); 647 #endif 648 if (ifp->if_flags & IFF_MONITOR) 649 senderr(ENETDOWN); 650 if (!IFNET_IS_UP_RUNNING(ifp)) 651 senderr(ENETDOWN); 652 if (vap->iv_state == IEEE80211_S_CAC) { 653 IEEE80211_DPRINTF(vap, 654 IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH, 655 "block %s frame in CAC state\n", "raw data"); 656 vap->iv_stats.is_tx_badstate++; 657 senderr(EIO); /* XXX */ 658 } else if (vap->iv_state == IEEE80211_S_SCAN) 659 senderr(EIO); 660 /* XXX bypass bridge, pfil, carp, etc. */ 661 662 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_ack)) 663 senderr(EIO); /* XXX */ 664 wh = mtod(m, struct ieee80211_frame *); 665 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 666 IEEE80211_FC0_VERSION_0) 667 senderr(EIO); /* XXX */ 668 669 /* locate destination node */ 670 switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) { 671 case IEEE80211_FC1_DIR_NODS: 672 case IEEE80211_FC1_DIR_FROMDS: 673 ni = ieee80211_find_txnode(vap, wh->i_addr1); 674 break; 675 case IEEE80211_FC1_DIR_TODS: 676 case IEEE80211_FC1_DIR_DSTODS: 677 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) 678 senderr(EIO); /* XXX */ 679 ni = ieee80211_find_txnode(vap, wh->i_addr3); 680 break; 681 default: 682 senderr(EIO); /* XXX */ 683 } 684 if (ni == NULL) { 685 /* 686 * Permit packets w/ bpf params through regardless 687 * (see below about sa_len). 688 */ 689 if (dst->sa_len == 0) 690 senderr(EHOSTUNREACH); 691 ni = ieee80211_ref_node(vap->iv_bss); 692 } 693 694 /* 695 * Sanitize mbuf for net80211 flags leaked from above. 696 * 697 * NB: This must be done before ieee80211_classify as 698 * it marks EAPOL in frames with M_EAPOL. 699 */ 700 m->m_flags &= ~M_80211_TX; 701 702 /* calculate priority so drivers can find the tx queue */ 703 /* XXX assumes an 802.3 frame */ 704 if (ieee80211_classify(ni, m)) 705 senderr(EIO); /* XXX */ 706 707 IFNET_STAT_INC(ifp, opackets, 1); 708 IEEE80211_NODE_STAT(ni, tx_data); 709 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 710 IEEE80211_NODE_STAT(ni, tx_mcast); 711 m->m_flags |= M_MCAST; 712 } else 713 IEEE80211_NODE_STAT(ni, tx_ucast); 714 /* NB: ieee80211_encap does not include 802.11 header */ 715 IEEE80211_NODE_STAT_ADD(ni, tx_bytes, m->m_pkthdr.len); 716 717 IEEE80211_TX_LOCK(ic); 718 719 /* 720 * NB: DLT_IEEE802_11_RADIO identifies the parameters are 721 * present by setting the sa_len field of the sockaddr (yes, 722 * this is a hack). 723 * NB: we assume sa_data is suitably aligned to cast. 724 */ 725 ret = ieee80211_raw_output(vap, ni, m, 726 (const struct ieee80211_bpf_params *)(dst->sa_len ? 727 dst->sa_data : NULL)); 728 IEEE80211_TX_UNLOCK(ic); 729 return (ret); 730 bad: 731 if (m != NULL) 732 m_freem(m); 733 if (ni != NULL) 734 ieee80211_free_node(ni); 735 IFNET_STAT_INC(ifp, oerrors, 1); 736 return error; 737 #undef senderr 738 } 739 740 /* 741 * Set the direction field and address fields of an outgoing 742 * frame. Note this should be called early on in constructing 743 * a frame as it sets i_fc[1]; other bits can then be or'd in. 744 */ 745 void 746 ieee80211_send_setup( 747 struct ieee80211_node *ni, 748 struct mbuf *m, 749 int type, int tid, 750 const uint8_t sa[IEEE80211_ADDR_LEN], 751 const uint8_t da[IEEE80211_ADDR_LEN], 752 const uint8_t bssid[IEEE80211_ADDR_LEN]) 753 { 754 #define WH4(wh) ((struct ieee80211_frame_addr4 *)wh) 755 struct ieee80211vap *vap = ni->ni_vap; 756 struct ieee80211_tx_ampdu *tap; 757 struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *); 758 ieee80211_seq seqno; 759 760 IEEE80211_TX_LOCK_ASSERT(ni->ni_ic); 761 762 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | type; 763 if ((type & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_DATA) { 764 switch (vap->iv_opmode) { 765 case IEEE80211_M_STA: 766 wh->i_fc[1] = IEEE80211_FC1_DIR_TODS; 767 IEEE80211_ADDR_COPY(wh->i_addr1, bssid); 768 IEEE80211_ADDR_COPY(wh->i_addr2, sa); 769 IEEE80211_ADDR_COPY(wh->i_addr3, da); 770 break; 771 case IEEE80211_M_IBSS: 772 case IEEE80211_M_AHDEMO: 773 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 774 IEEE80211_ADDR_COPY(wh->i_addr1, da); 775 IEEE80211_ADDR_COPY(wh->i_addr2, sa); 776 IEEE80211_ADDR_COPY(wh->i_addr3, bssid); 777 break; 778 case IEEE80211_M_HOSTAP: 779 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS; 780 IEEE80211_ADDR_COPY(wh->i_addr1, da); 781 IEEE80211_ADDR_COPY(wh->i_addr2, bssid); 782 IEEE80211_ADDR_COPY(wh->i_addr3, sa); 783 break; 784 case IEEE80211_M_WDS: 785 wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS; 786 IEEE80211_ADDR_COPY(wh->i_addr1, da); 787 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); 788 IEEE80211_ADDR_COPY(wh->i_addr3, da); 789 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, sa); 790 break; 791 case IEEE80211_M_MBSS: 792 #ifdef IEEE80211_SUPPORT_MESH 793 if (IEEE80211_IS_MULTICAST(da)) { 794 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS; 795 /* XXX next hop */ 796 IEEE80211_ADDR_COPY(wh->i_addr1, da); 797 IEEE80211_ADDR_COPY(wh->i_addr2, 798 vap->iv_myaddr); 799 } else { 800 wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS; 801 IEEE80211_ADDR_COPY(wh->i_addr1, da); 802 IEEE80211_ADDR_COPY(wh->i_addr2, 803 vap->iv_myaddr); 804 IEEE80211_ADDR_COPY(wh->i_addr3, da); 805 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, sa); 806 } 807 #endif 808 break; 809 case IEEE80211_M_MONITOR: /* NB: to quiet compiler */ 810 break; 811 } 812 } else { 813 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 814 IEEE80211_ADDR_COPY(wh->i_addr1, da); 815 IEEE80211_ADDR_COPY(wh->i_addr2, sa); 816 #ifdef IEEE80211_SUPPORT_MESH 817 if (vap->iv_opmode == IEEE80211_M_MBSS) 818 IEEE80211_ADDR_COPY(wh->i_addr3, sa); 819 else 820 #endif 821 IEEE80211_ADDR_COPY(wh->i_addr3, bssid); 822 } 823 *(uint16_t *)&wh->i_dur[0] = 0; 824 825 tap = &ni->ni_tx_ampdu[tid]; 826 if (tid != IEEE80211_NONQOS_TID && IEEE80211_AMPDU_RUNNING(tap)) 827 m->m_flags |= M_AMPDU_MPDU; 828 else { 829 seqno = ni->ni_txseqs[tid]++; 830 *(uint16_t *)&wh->i_seq[0] = 831 htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); 832 M_SEQNO_SET(m, seqno); 833 } 834 835 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) 836 m->m_flags |= M_MCAST; 837 #undef WH4 838 } 839 840 /* 841 * Send a management frame to the specified node. The node pointer 842 * must have a reference as the pointer will be passed to the driver 843 * and potentially held for a long time. If the frame is successfully 844 * dispatched to the driver, then it is responsible for freeing the 845 * reference (and potentially free'ing up any associated storage); 846 * otherwise deal with reclaiming any reference (on error). 847 */ 848 int 849 ieee80211_mgmt_output(struct ieee80211_node *ni, struct mbuf *m, int type, 850 struct ieee80211_bpf_params *params) 851 { 852 struct ieee80211vap *vap = ni->ni_vap; 853 struct ieee80211com *ic = ni->ni_ic; 854 struct ieee80211_frame *wh; 855 int ret; 856 857 KASSERT(ni != NULL, ("null node")); 858 859 if (vap->iv_state == IEEE80211_S_CAC) { 860 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH, 861 ni, "block %s frame in CAC state", 862 ieee80211_mgt_subtype_name[ 863 (type & IEEE80211_FC0_SUBTYPE_MASK) >> 864 IEEE80211_FC0_SUBTYPE_SHIFT]); 865 vap->iv_stats.is_tx_badstate++; 866 ieee80211_free_node(ni); 867 m_freem(m); 868 return EIO; /* XXX */ 869 } 870 871 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); 872 if (m == NULL) { 873 ieee80211_free_node(ni); 874 return ENOMEM; 875 } 876 877 IEEE80211_TX_LOCK(ic); 878 879 wh = mtod(m, struct ieee80211_frame *); 880 ieee80211_send_setup(ni, m, 881 IEEE80211_FC0_TYPE_MGT | type, IEEE80211_NONQOS_TID, 882 vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid); 883 if (params->ibp_flags & IEEE80211_BPF_CRYPTO) { 884 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr1, 885 "encrypting frame (%s)", __func__); 886 wh->i_fc[1] |= IEEE80211_FC1_PROTECTED; 887 } 888 m->m_flags |= M_ENCAP; /* mark encapsulated */ 889 890 KASSERT(type != IEEE80211_FC0_SUBTYPE_PROBE_RESP, ("probe response?")); 891 M_WME_SETAC(m, params->ibp_pri); 892 893 #ifdef IEEE80211_DEBUG 894 /* avoid printing too many frames */ 895 if ((ieee80211_msg_debug(vap) && doprint(vap, type)) || 896 ieee80211_msg_dumppkts(vap)) { 897 kprintf("[%s] send %s on channel %u\n", 898 ether_sprintf(wh->i_addr1), 899 ieee80211_mgt_subtype_name[ 900 (type & IEEE80211_FC0_SUBTYPE_MASK) >> 901 IEEE80211_FC0_SUBTYPE_SHIFT], 902 ieee80211_chan2ieee(ic, ic->ic_curchan)); 903 } 904 #endif 905 IEEE80211_NODE_STAT(ni, tx_mgmt); 906 907 ret = ieee80211_raw_output(vap, ni, m, params); 908 IEEE80211_TX_UNLOCK(ic); 909 return (ret); 910 } 911 912 /* 913 * Send a null data frame to the specified node. If the station 914 * is setup for QoS then a QoS Null Data frame is constructed. 915 * If this is a WDS station then a 4-address frame is constructed. 916 * 917 * NB: the caller is assumed to have setup a node reference 918 * for use; this is necessary to deal with a race condition 919 * when probing for inactive stations. Like ieee80211_mgmt_output 920 * we must cleanup any node reference on error; however we 921 * can safely just unref it as we know it will never be the 922 * last reference to the node. 923 */ 924 int 925 ieee80211_send_nulldata(struct ieee80211_node *ni) 926 { 927 struct ieee80211vap *vap = ni->ni_vap; 928 struct ieee80211com *ic = ni->ni_ic; 929 struct mbuf *m; 930 struct ieee80211_frame *wh; 931 int hdrlen; 932 uint8_t *frm; 933 int ret; 934 935 if (vap->iv_state == IEEE80211_S_CAC) { 936 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH, 937 ni, "block %s frame in CAC state", "null data"); 938 ieee80211_unref_node(&ni); 939 vap->iv_stats.is_tx_badstate++; 940 return EIO; /* XXX */ 941 } 942 943 if (ni->ni_flags & (IEEE80211_NODE_QOS|IEEE80211_NODE_HT)) 944 hdrlen = sizeof(struct ieee80211_qosframe); 945 else 946 hdrlen = sizeof(struct ieee80211_frame); 947 /* NB: only WDS vap's get 4-address frames */ 948 if (vap->iv_opmode == IEEE80211_M_WDS) 949 hdrlen += IEEE80211_ADDR_LEN; 950 if (ic->ic_flags & IEEE80211_F_DATAPAD) 951 hdrlen = roundup(hdrlen, sizeof(uint32_t)); 952 953 m = ieee80211_getmgtframe(&frm, ic->ic_headroom + hdrlen, 0); 954 if (m == NULL) { 955 /* XXX debug msg */ 956 ieee80211_unref_node(&ni); 957 vap->iv_stats.is_tx_nobuf++; 958 return ENOMEM; 959 } 960 KASSERT(M_LEADINGSPACE(m) >= hdrlen, 961 ("leading space %zd", M_LEADINGSPACE(m))); 962 M_PREPEND(m, hdrlen, M_NOWAIT); 963 if (m == NULL) { 964 /* NB: cannot happen */ 965 ieee80211_free_node(ni); 966 return ENOMEM; 967 } 968 969 IEEE80211_TX_LOCK(ic); 970 971 wh = mtod(m, struct ieee80211_frame *); /* NB: a little lie */ 972 if (ni->ni_flags & IEEE80211_NODE_QOS) { 973 const int tid = WME_AC_TO_TID(WME_AC_BE); 974 uint8_t *qos; 975 976 ieee80211_send_setup(ni, m, 977 IEEE80211_FC0_TYPE_DATA | IEEE80211_FC0_SUBTYPE_QOS_NULL, 978 tid, vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid); 979 980 if (vap->iv_opmode == IEEE80211_M_WDS) 981 qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos; 982 else 983 qos = ((struct ieee80211_qosframe *) wh)->i_qos; 984 qos[0] = tid & IEEE80211_QOS_TID; 985 if (ic->ic_wme.wme_wmeChanParams.cap_wmeParams[WME_AC_BE].wmep_noackPolicy) 986 qos[0] |= IEEE80211_QOS_ACKPOLICY_NOACK; 987 qos[1] = 0; 988 } else { 989 ieee80211_send_setup(ni, m, 990 IEEE80211_FC0_TYPE_DATA | IEEE80211_FC0_SUBTYPE_NODATA, 991 IEEE80211_NONQOS_TID, 992 vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid); 993 } 994 if (vap->iv_opmode != IEEE80211_M_WDS) { 995 /* NB: power management bit is never sent by an AP */ 996 if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) && 997 vap->iv_opmode != IEEE80211_M_HOSTAP) 998 wh->i_fc[1] |= IEEE80211_FC1_PWR_MGT; 999 } 1000 m->m_len = m->m_pkthdr.len = hdrlen; 1001 m->m_flags |= M_ENCAP; /* mark encapsulated */ 1002 1003 M_WME_SETAC(m, WME_AC_BE); 1004 1005 IEEE80211_NODE_STAT(ni, tx_data); 1006 1007 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS, ni, 1008 "send %snull data frame on channel %u, pwr mgt %s", 1009 ni->ni_flags & IEEE80211_NODE_QOS ? "QoS " : "", 1010 ieee80211_chan2ieee(ic, ic->ic_curchan), 1011 wh->i_fc[1] & IEEE80211_FC1_PWR_MGT ? "ena" : "dis"); 1012 1013 ret = ieee80211_raw_output(vap, ni, m, NULL); 1014 IEEE80211_TX_UNLOCK(ic); 1015 return (ret); 1016 } 1017 1018 /* 1019 * Assign priority to a frame based on any vlan tag assigned 1020 * to the station and/or any Diffserv setting in an IP header. 1021 * Finally, if an ACM policy is setup (in station mode) it's 1022 * applied. 1023 */ 1024 int 1025 ieee80211_classify(struct ieee80211_node *ni, struct mbuf *m) 1026 { 1027 const struct ether_header *eh = mtod(m, struct ether_header *); 1028 int v_wme_ac, d_wme_ac, ac; 1029 1030 /* 1031 * Always promote PAE/EAPOL frames to high priority. 1032 */ 1033 if (eh->ether_type == htons(ETHERTYPE_PAE)) { 1034 /* NB: mark so others don't need to check header */ 1035 m->m_flags |= M_EAPOL; 1036 ac = WME_AC_VO; 1037 goto done; 1038 } 1039 /* 1040 * Non-qos traffic goes to BE. 1041 */ 1042 if ((ni->ni_flags & IEEE80211_NODE_QOS) == 0) { 1043 ac = WME_AC_BE; 1044 goto done; 1045 } 1046 1047 /* 1048 * If node has a vlan tag then all traffic 1049 * to it must have a matching tag. 1050 */ 1051 v_wme_ac = 0; 1052 if (ni->ni_vlan != 0) { 1053 if ((m->m_flags & M_VLANTAG) == 0) { 1054 IEEE80211_NODE_STAT(ni, tx_novlantag); 1055 return 1; 1056 } 1057 #if defined(__DragonFly__) 1058 if (EVL_VLANOFTAG(m->m_pkthdr.ether_vlantag) != 1059 EVL_VLANOFTAG(ni->ni_vlan)) { 1060 IEEE80211_NODE_STAT(ni, tx_vlanmismatch); 1061 return 1; 1062 } 1063 #else 1064 if (EVL_VLANOFTAG(m->m_pkthdr.ether_vtag) != 1065 EVL_VLANOFTAG(ni->ni_vlan)) { 1066 IEEE80211_NODE_STAT(ni, tx_vlanmismatch); 1067 return 1; 1068 } 1069 #endif 1070 /* map vlan priority to AC */ 1071 v_wme_ac = TID_TO_WME_AC(EVL_PRIOFTAG(ni->ni_vlan)); 1072 } 1073 1074 /* XXX m_copydata may be too slow for fast path */ 1075 #ifdef INET 1076 if (eh->ether_type == htons(ETHERTYPE_IP)) { 1077 uint8_t tos; 1078 /* 1079 * IP frame, map the DSCP bits from the TOS field. 1080 */ 1081 /* NB: ip header may not be in first mbuf */ 1082 m_copydata(m, sizeof(struct ether_header) + 1083 offsetof(struct ip, ip_tos), sizeof(tos), &tos); 1084 tos >>= 5; /* NB: ECN + low 3 bits of DSCP */ 1085 d_wme_ac = TID_TO_WME_AC(tos); 1086 } else { 1087 #endif /* INET */ 1088 #ifdef INET6 1089 if (eh->ether_type == htons(ETHERTYPE_IPV6)) { 1090 uint32_t flow; 1091 uint8_t tos; 1092 /* 1093 * IPv6 frame, map the DSCP bits from the traffic class field. 1094 */ 1095 m_copydata(m, sizeof(struct ether_header) + 1096 offsetof(struct ip6_hdr, ip6_flow), sizeof(flow), 1097 (caddr_t) &flow); 1098 tos = (uint8_t)(ntohl(flow) >> 20); 1099 tos >>= 5; /* NB: ECN + low 3 bits of DSCP */ 1100 d_wme_ac = TID_TO_WME_AC(tos); 1101 } else { 1102 #endif /* INET6 */ 1103 d_wme_ac = WME_AC_BE; 1104 #ifdef INET6 1105 } 1106 #endif 1107 #ifdef INET 1108 } 1109 #endif 1110 /* 1111 * Use highest priority AC. 1112 */ 1113 if (v_wme_ac > d_wme_ac) 1114 ac = v_wme_ac; 1115 else 1116 ac = d_wme_ac; 1117 1118 /* 1119 * Apply ACM policy. 1120 */ 1121 if (ni->ni_vap->iv_opmode == IEEE80211_M_STA) { 1122 static const int acmap[4] = { 1123 WME_AC_BK, /* WME_AC_BE */ 1124 WME_AC_BK, /* WME_AC_BK */ 1125 WME_AC_BE, /* WME_AC_VI */ 1126 WME_AC_VI, /* WME_AC_VO */ 1127 }; 1128 struct ieee80211com *ic = ni->ni_ic; 1129 1130 while (ac != WME_AC_BK && 1131 ic->ic_wme.wme_wmeBssChanParams.cap_wmeParams[ac].wmep_acm) 1132 ac = acmap[ac]; 1133 } 1134 done: 1135 M_WME_SETAC(m, ac); 1136 return 0; 1137 } 1138 1139 /* 1140 * Insure there is sufficient contiguous space to encapsulate the 1141 * 802.11 data frame. If room isn't already there, arrange for it. 1142 * Drivers and cipher modules assume we have done the necessary work 1143 * and fail rudely if they don't find the space they need. 1144 */ 1145 struct mbuf * 1146 ieee80211_mbuf_adjust(struct ieee80211vap *vap, int hdrsize, 1147 struct ieee80211_key *key, struct mbuf *m) 1148 { 1149 #define TO_BE_RECLAIMED (sizeof(struct ether_header) - sizeof(struct llc)) 1150 int needed_space = vap->iv_ic->ic_headroom + hdrsize; 1151 1152 if (key != NULL) { 1153 /* XXX belongs in crypto code? */ 1154 needed_space += key->wk_cipher->ic_header; 1155 /* XXX frags */ 1156 /* 1157 * When crypto is being done in the host we must insure 1158 * the data are writable for the cipher routines; clone 1159 * a writable mbuf chain. 1160 * XXX handle SWMIC specially 1161 */ 1162 if (key->wk_flags & (IEEE80211_KEY_SWENCRYPT|IEEE80211_KEY_SWENMIC)) { 1163 m = m_unshare(m, M_NOWAIT); 1164 if (m == NULL) { 1165 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 1166 "%s: cannot get writable mbuf\n", __func__); 1167 vap->iv_stats.is_tx_nobuf++; /* XXX new stat */ 1168 return NULL; 1169 } 1170 } 1171 } 1172 /* 1173 * We know we are called just before stripping an Ethernet 1174 * header and prepending an LLC header. This means we know 1175 * there will be 1176 * sizeof(struct ether_header) - sizeof(struct llc) 1177 * bytes recovered to which we need additional space for the 1178 * 802.11 header and any crypto header. 1179 */ 1180 /* XXX check trailing space and copy instead? */ 1181 if (M_LEADINGSPACE(m) < needed_space - TO_BE_RECLAIMED) { 1182 struct mbuf *n = m_gethdr(M_NOWAIT, m->m_type); 1183 if (n == NULL) { 1184 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, 1185 "%s: cannot expand storage\n", __func__); 1186 vap->iv_stats.is_tx_nobuf++; 1187 m_freem(m); 1188 return NULL; 1189 } 1190 #if defined(__DragonFly__) 1191 KASSERT(needed_space <= MHLEN, 1192 ("not enough room, need %u got %zd\n", needed_space, MHLEN)); 1193 #else 1194 KASSERT(needed_space <= MHLEN, 1195 ("not enough room, need %u got %d\n", needed_space, MHLEN)); 1196 #endif 1197 /* 1198 * Setup new mbuf to have leading space to prepend the 1199 * 802.11 header and any crypto header bits that are 1200 * required (the latter are added when the driver calls 1201 * back to ieee80211_crypto_encap to do crypto encapsulation). 1202 */ 1203 /* NB: must be first 'cuz it clobbers m_data */ 1204 m_move_pkthdr(n, m); 1205 n->m_len = 0; /* NB: m_gethdr does not set */ 1206 n->m_data += needed_space; 1207 /* 1208 * Pull up Ethernet header to create the expected layout. 1209 * We could use m_pullup but that's overkill (i.e. we don't 1210 * need the actual data) and it cannot fail so do it inline 1211 * for speed. 1212 */ 1213 /* NB: struct ether_header is known to be contiguous */ 1214 n->m_len += sizeof(struct ether_header); 1215 m->m_len -= sizeof(struct ether_header); 1216 m->m_data += sizeof(struct ether_header); 1217 /* 1218 * Replace the head of the chain. 1219 */ 1220 n->m_next = m; 1221 m = n; 1222 } 1223 return m; 1224 #undef TO_BE_RECLAIMED 1225 } 1226 1227 /* 1228 * Return the transmit key to use in sending a unicast frame. 1229 * If a unicast key is set we use that. When no unicast key is set 1230 * we fall back to the default transmit key. 1231 */ 1232 static __inline struct ieee80211_key * 1233 ieee80211_crypto_getucastkey(struct ieee80211vap *vap, 1234 struct ieee80211_node *ni) 1235 { 1236 if (IEEE80211_KEY_UNDEFINED(&ni->ni_ucastkey)) { 1237 if (vap->iv_def_txkey == IEEE80211_KEYIX_NONE || 1238 IEEE80211_KEY_UNDEFINED(&vap->iv_nw_keys[vap->iv_def_txkey])) 1239 return NULL; 1240 return &vap->iv_nw_keys[vap->iv_def_txkey]; 1241 } else { 1242 return &ni->ni_ucastkey; 1243 } 1244 } 1245 1246 /* 1247 * Return the transmit key to use in sending a multicast frame. 1248 * Multicast traffic always uses the group key which is installed as 1249 * the default tx key. 1250 */ 1251 static __inline struct ieee80211_key * 1252 ieee80211_crypto_getmcastkey(struct ieee80211vap *vap, 1253 struct ieee80211_node *ni) 1254 { 1255 if (vap->iv_def_txkey == IEEE80211_KEYIX_NONE || 1256 IEEE80211_KEY_UNDEFINED(&vap->iv_nw_keys[vap->iv_def_txkey])) 1257 return NULL; 1258 return &vap->iv_nw_keys[vap->iv_def_txkey]; 1259 } 1260 1261 /* 1262 * Encapsulate an outbound data frame. The mbuf chain is updated. 1263 * If an error is encountered NULL is returned. The caller is required 1264 * to provide a node reference and pullup the ethernet header in the 1265 * first mbuf. 1266 * 1267 * NB: Packet is assumed to be processed by ieee80211_classify which 1268 * marked EAPOL frames w/ M_EAPOL. 1269 */ 1270 struct mbuf * 1271 ieee80211_encap(struct ieee80211vap *vap, struct ieee80211_node *ni, 1272 struct mbuf *m) 1273 { 1274 #define WH4(wh) ((struct ieee80211_frame_addr4 *)(wh)) 1275 #define MC01(mc) ((struct ieee80211_meshcntl_ae01 *)mc) 1276 struct ieee80211com *ic = ni->ni_ic; 1277 #ifdef IEEE80211_SUPPORT_MESH 1278 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1279 struct ieee80211_meshcntl_ae10 *mc; 1280 struct ieee80211_mesh_route *rt = NULL; 1281 int dir = -1; 1282 #endif 1283 struct ether_header eh; 1284 struct ieee80211_frame *wh; 1285 struct ieee80211_key *key; 1286 struct llc *llc; 1287 int hdrsize, hdrspace, datalen, addqos, txfrag, is4addr; 1288 ieee80211_seq seqno; 1289 int meshhdrsize, meshae; 1290 uint8_t *qos; 1291 1292 IEEE80211_TX_LOCK_ASSERT(ic); 1293 1294 /* 1295 * Copy existing Ethernet header to a safe place. The 1296 * rest of the code assumes it's ok to strip it when 1297 * reorganizing state for the final encapsulation. 1298 */ 1299 KASSERT(m->m_len >= sizeof(eh), ("no ethernet header!")); 1300 ETHER_HEADER_COPY(&eh, mtod(m, caddr_t)); 1301 1302 /* 1303 * Insure space for additional headers. First identify 1304 * transmit key to use in calculating any buffer adjustments 1305 * required. This is also used below to do privacy 1306 * encapsulation work. Then calculate the 802.11 header 1307 * size and any padding required by the driver. 1308 * 1309 * Note key may be NULL if we fall back to the default 1310 * transmit key and that is not set. In that case the 1311 * buffer may not be expanded as needed by the cipher 1312 * routines, but they will/should discard it. 1313 */ 1314 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 1315 if (vap->iv_opmode == IEEE80211_M_STA || 1316 !IEEE80211_IS_MULTICAST(eh.ether_dhost) || 1317 (vap->iv_opmode == IEEE80211_M_WDS && 1318 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY))) 1319 key = ieee80211_crypto_getucastkey(vap, ni); 1320 else 1321 key = ieee80211_crypto_getmcastkey(vap, ni); 1322 if (key == NULL && (m->m_flags & M_EAPOL) == 0) { 1323 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, 1324 eh.ether_dhost, 1325 "no default transmit key (%s) deftxkey %u", 1326 __func__, vap->iv_def_txkey); 1327 vap->iv_stats.is_tx_nodefkey++; 1328 goto bad; 1329 } 1330 } else 1331 key = NULL; 1332 /* 1333 * XXX Some ap's don't handle QoS-encapsulated EAPOL 1334 * frames so suppress use. This may be an issue if other 1335 * ap's require all data frames to be QoS-encapsulated 1336 * once negotiated in which case we'll need to make this 1337 * configurable. 1338 * NB: mesh data frames are QoS. 1339 */ 1340 addqos = ((ni->ni_flags & (IEEE80211_NODE_QOS|IEEE80211_NODE_HT)) || 1341 (vap->iv_opmode == IEEE80211_M_MBSS)) && 1342 (m->m_flags & M_EAPOL) == 0; 1343 if (addqos) 1344 hdrsize = sizeof(struct ieee80211_qosframe); 1345 else 1346 hdrsize = sizeof(struct ieee80211_frame); 1347 #ifdef IEEE80211_SUPPORT_MESH 1348 if (vap->iv_opmode == IEEE80211_M_MBSS) { 1349 /* 1350 * Mesh data frames are encapsulated according to the 1351 * rules of Section 11B.8.5 (p.139 of D3.0 spec). 1352 * o Group Addressed data (aka multicast) originating 1353 * at the local sta are sent w/ 3-address format and 1354 * address extension mode 00 1355 * o Individually Addressed data (aka unicast) originating 1356 * at the local sta are sent w/ 4-address format and 1357 * address extension mode 00 1358 * o Group Addressed data forwarded from a non-mesh sta are 1359 * sent w/ 3-address format and address extension mode 01 1360 * o Individually Address data from another sta are sent 1361 * w/ 4-address format and address extension mode 10 1362 */ 1363 is4addr = 0; /* NB: don't use, disable */ 1364 if (!IEEE80211_IS_MULTICAST(eh.ether_dhost)) { 1365 rt = ieee80211_mesh_rt_find(vap, eh.ether_dhost); 1366 KASSERT(rt != NULL, ("route is NULL")); 1367 dir = IEEE80211_FC1_DIR_DSTODS; 1368 hdrsize += IEEE80211_ADDR_LEN; 1369 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { 1370 if (IEEE80211_ADDR_EQ(rt->rt_mesh_gate, 1371 vap->iv_myaddr)) { 1372 IEEE80211_NOTE_MAC(vap, 1373 IEEE80211_MSG_MESH, 1374 eh.ether_dhost, 1375 "%s", "trying to send to ourself"); 1376 goto bad; 1377 } 1378 meshae = IEEE80211_MESH_AE_10; 1379 meshhdrsize = 1380 sizeof(struct ieee80211_meshcntl_ae10); 1381 } else { 1382 meshae = IEEE80211_MESH_AE_00; 1383 meshhdrsize = 1384 sizeof(struct ieee80211_meshcntl); 1385 } 1386 } else { 1387 dir = IEEE80211_FC1_DIR_FROMDS; 1388 if (!IEEE80211_ADDR_EQ(eh.ether_shost, vap->iv_myaddr)) { 1389 /* proxy group */ 1390 meshae = IEEE80211_MESH_AE_01; 1391 meshhdrsize = 1392 sizeof(struct ieee80211_meshcntl_ae01); 1393 } else { 1394 /* group */ 1395 meshae = IEEE80211_MESH_AE_00; 1396 meshhdrsize = sizeof(struct ieee80211_meshcntl); 1397 } 1398 } 1399 } else { 1400 #endif 1401 /* 1402 * 4-address frames need to be generated for: 1403 * o packets sent through a WDS vap (IEEE80211_M_WDS) 1404 * o packets sent through a vap marked for relaying 1405 * (e.g. a station operating with dynamic WDS) 1406 */ 1407 is4addr = vap->iv_opmode == IEEE80211_M_WDS || 1408 ((vap->iv_flags_ext & IEEE80211_FEXT_4ADDR) && 1409 !IEEE80211_ADDR_EQ(eh.ether_shost, vap->iv_myaddr)); 1410 if (is4addr) 1411 hdrsize += IEEE80211_ADDR_LEN; 1412 meshhdrsize = meshae = 0; 1413 #ifdef IEEE80211_SUPPORT_MESH 1414 } 1415 #endif 1416 /* 1417 * Honor driver DATAPAD requirement. 1418 */ 1419 if (ic->ic_flags & IEEE80211_F_DATAPAD) 1420 hdrspace = roundup(hdrsize, sizeof(uint32_t)); 1421 else 1422 hdrspace = hdrsize; 1423 1424 if (__predict_true((m->m_flags & M_FF) == 0)) { 1425 /* 1426 * Normal frame. 1427 */ 1428 m = ieee80211_mbuf_adjust(vap, hdrspace + meshhdrsize, key, m); 1429 if (m == NULL) { 1430 /* NB: ieee80211_mbuf_adjust handles msgs+statistics */ 1431 goto bad; 1432 } 1433 /* NB: this could be optimized 'cuz of ieee80211_mbuf_adjust */ 1434 m_adj(m, sizeof(struct ether_header) - sizeof(struct llc)); 1435 llc = mtod(m, struct llc *); 1436 llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP; 1437 llc->llc_control = LLC_UI; 1438 llc->llc_snap.org_code[0] = 0; 1439 llc->llc_snap.org_code[1] = 0; 1440 llc->llc_snap.org_code[2] = 0; 1441 llc->llc_snap.ether_type = eh.ether_type; 1442 } else { 1443 #ifdef IEEE80211_SUPPORT_SUPERG 1444 /* 1445 * Aggregated frame. 1446 */ 1447 m = ieee80211_ff_encap(vap, m, hdrspace + meshhdrsize, key); 1448 if (m == NULL) 1449 #endif 1450 goto bad; 1451 } 1452 datalen = m->m_pkthdr.len; /* NB: w/o 802.11 header */ 1453 1454 M_PREPEND(m, hdrspace + meshhdrsize, M_NOWAIT); 1455 if (m == NULL) { 1456 vap->iv_stats.is_tx_nobuf++; 1457 goto bad; 1458 } 1459 wh = mtod(m, struct ieee80211_frame *); 1460 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_DATA; 1461 *(uint16_t *)wh->i_dur = 0; 1462 qos = NULL; /* NB: quiet compiler */ 1463 if (is4addr) { 1464 wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS; 1465 IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_macaddr); 1466 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); 1467 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_dhost); 1468 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, eh.ether_shost); 1469 } else switch (vap->iv_opmode) { 1470 case IEEE80211_M_STA: 1471 wh->i_fc[1] = IEEE80211_FC1_DIR_TODS; 1472 IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_bssid); 1473 IEEE80211_ADDR_COPY(wh->i_addr2, eh.ether_shost); 1474 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_dhost); 1475 break; 1476 case IEEE80211_M_IBSS: 1477 case IEEE80211_M_AHDEMO: 1478 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 1479 IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost); 1480 IEEE80211_ADDR_COPY(wh->i_addr2, eh.ether_shost); 1481 /* 1482 * NB: always use the bssid from iv_bss as the 1483 * neighbor's may be stale after an ibss merge 1484 */ 1485 IEEE80211_ADDR_COPY(wh->i_addr3, vap->iv_bss->ni_bssid); 1486 break; 1487 case IEEE80211_M_HOSTAP: 1488 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS; 1489 IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost); 1490 IEEE80211_ADDR_COPY(wh->i_addr2, ni->ni_bssid); 1491 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_shost); 1492 break; 1493 #ifdef IEEE80211_SUPPORT_MESH 1494 case IEEE80211_M_MBSS: 1495 /* NB: offset by hdrspace to deal with DATAPAD */ 1496 mc = (struct ieee80211_meshcntl_ae10 *) 1497 (mtod(m, uint8_t *) + hdrspace); 1498 wh->i_fc[1] = dir; 1499 switch (meshae) { 1500 case IEEE80211_MESH_AE_00: /* no proxy */ 1501 mc->mc_flags = 0; 1502 if (dir == IEEE80211_FC1_DIR_DSTODS) { /* ucast */ 1503 IEEE80211_ADDR_COPY(wh->i_addr1, 1504 ni->ni_macaddr); 1505 IEEE80211_ADDR_COPY(wh->i_addr2, 1506 vap->iv_myaddr); 1507 IEEE80211_ADDR_COPY(wh->i_addr3, 1508 eh.ether_dhost); 1509 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, 1510 eh.ether_shost); 1511 qos =((struct ieee80211_qosframe_addr4 *) 1512 wh)->i_qos; 1513 } else if (dir == IEEE80211_FC1_DIR_FROMDS) { 1514 /* mcast */ 1515 IEEE80211_ADDR_COPY(wh->i_addr1, 1516 eh.ether_dhost); 1517 IEEE80211_ADDR_COPY(wh->i_addr2, 1518 vap->iv_myaddr); 1519 IEEE80211_ADDR_COPY(wh->i_addr3, 1520 eh.ether_shost); 1521 qos = ((struct ieee80211_qosframe *) 1522 wh)->i_qos; 1523 } 1524 break; 1525 case IEEE80211_MESH_AE_01: /* mcast, proxy */ 1526 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS; 1527 IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost); 1528 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); 1529 IEEE80211_ADDR_COPY(wh->i_addr3, vap->iv_myaddr); 1530 mc->mc_flags = 1; 1531 IEEE80211_ADDR_COPY(MC01(mc)->mc_addr4, 1532 eh.ether_shost); 1533 qos = ((struct ieee80211_qosframe *) wh)->i_qos; 1534 break; 1535 case IEEE80211_MESH_AE_10: /* ucast, proxy */ 1536 KASSERT(rt != NULL, ("route is NULL")); 1537 IEEE80211_ADDR_COPY(wh->i_addr1, rt->rt_nexthop); 1538 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); 1539 IEEE80211_ADDR_COPY(wh->i_addr3, rt->rt_mesh_gate); 1540 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, vap->iv_myaddr); 1541 mc->mc_flags = IEEE80211_MESH_AE_10; 1542 IEEE80211_ADDR_COPY(mc->mc_addr5, eh.ether_dhost); 1543 IEEE80211_ADDR_COPY(mc->mc_addr6, eh.ether_shost); 1544 qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos; 1545 break; 1546 default: 1547 KASSERT(0, ("meshae %d", meshae)); 1548 break; 1549 } 1550 mc->mc_ttl = ms->ms_ttl; 1551 ms->ms_seq++; 1552 LE_WRITE_4(mc->mc_seq, ms->ms_seq); 1553 break; 1554 #endif 1555 case IEEE80211_M_WDS: /* NB: is4addr should always be true */ 1556 default: 1557 goto bad; 1558 } 1559 if (m->m_flags & M_MORE_DATA) 1560 wh->i_fc[1] |= IEEE80211_FC1_MORE_DATA; 1561 if (addqos) { 1562 int ac, tid; 1563 1564 if (is4addr) { 1565 qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos; 1566 /* NB: mesh case handled earlier */ 1567 } else if (vap->iv_opmode != IEEE80211_M_MBSS) 1568 qos = ((struct ieee80211_qosframe *) wh)->i_qos; 1569 ac = M_WME_GETAC(m); 1570 /* map from access class/queue to 11e header priorty value */ 1571 tid = WME_AC_TO_TID(ac); 1572 qos[0] = tid & IEEE80211_QOS_TID; 1573 if (ic->ic_wme.wme_wmeChanParams.cap_wmeParams[ac].wmep_noackPolicy) 1574 qos[0] |= IEEE80211_QOS_ACKPOLICY_NOACK; 1575 #ifdef IEEE80211_SUPPORT_MESH 1576 if (vap->iv_opmode == IEEE80211_M_MBSS) 1577 qos[1] = IEEE80211_QOS_MC; 1578 else 1579 #endif 1580 qos[1] = 0; 1581 wh->i_fc[0] |= IEEE80211_FC0_SUBTYPE_QOS; 1582 1583 if ((m->m_flags & M_AMPDU_MPDU) == 0) { 1584 /* 1585 * NB: don't assign a sequence # to potential 1586 * aggregates; we expect this happens at the 1587 * point the frame comes off any aggregation q 1588 * as otherwise we may introduce holes in the 1589 * BA sequence space and/or make window accouting 1590 * more difficult. 1591 * 1592 * XXX may want to control this with a driver 1593 * capability; this may also change when we pull 1594 * aggregation up into net80211 1595 */ 1596 seqno = ni->ni_txseqs[tid]++; 1597 *(uint16_t *)wh->i_seq = 1598 htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); 1599 M_SEQNO_SET(m, seqno); 1600 } 1601 } else { 1602 seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]++; 1603 *(uint16_t *)wh->i_seq = 1604 htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); 1605 M_SEQNO_SET(m, seqno); 1606 } 1607 1608 1609 /* check if xmit fragmentation is required */ 1610 txfrag = (m->m_pkthdr.len > vap->iv_fragthreshold && 1611 !IEEE80211_IS_MULTICAST(wh->i_addr1) && 1612 (vap->iv_caps & IEEE80211_C_TXFRAG) && 1613 (m->m_flags & (M_FF | M_AMPDU_MPDU)) == 0); 1614 if (key != NULL) { 1615 /* 1616 * IEEE 802.1X: send EAPOL frames always in the clear. 1617 * WPA/WPA2: encrypt EAPOL keys when pairwise keys are set. 1618 */ 1619 if ((m->m_flags & M_EAPOL) == 0 || 1620 ((vap->iv_flags & IEEE80211_F_WPA) && 1621 (vap->iv_opmode == IEEE80211_M_STA ? 1622 !IEEE80211_KEY_UNDEFINED(key) : 1623 !IEEE80211_KEY_UNDEFINED(&ni->ni_ucastkey)))) { 1624 wh->i_fc[1] |= IEEE80211_FC1_PROTECTED; 1625 if (!ieee80211_crypto_enmic(vap, key, m, txfrag)) { 1626 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, 1627 eh.ether_dhost, 1628 "%s", "enmic failed, discard frame"); 1629 vap->iv_stats.is_crypto_enmicfail++; 1630 goto bad; 1631 } 1632 } 1633 } 1634 if (txfrag && !ieee80211_fragment(vap, m, hdrsize, 1635 key != NULL ? key->wk_cipher->ic_header : 0, vap->iv_fragthreshold)) 1636 goto bad; 1637 1638 m->m_flags |= M_ENCAP; /* mark encapsulated */ 1639 1640 IEEE80211_NODE_STAT(ni, tx_data); 1641 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1642 IEEE80211_NODE_STAT(ni, tx_mcast); 1643 m->m_flags |= M_MCAST; 1644 } else 1645 IEEE80211_NODE_STAT(ni, tx_ucast); 1646 IEEE80211_NODE_STAT_ADD(ni, tx_bytes, datalen); 1647 1648 return m; 1649 bad: 1650 if (m != NULL) 1651 m_freem(m); 1652 return NULL; 1653 #undef WH4 1654 #undef MC01 1655 } 1656 1657 /* 1658 * Fragment the frame according to the specified mtu. 1659 * The size of the 802.11 header (w/o padding) is provided 1660 * so we don't need to recalculate it. We create a new 1661 * mbuf for each fragment and chain it through m_nextpkt; 1662 * we might be able to optimize this by reusing the original 1663 * packet's mbufs but that is significantly more complicated. 1664 */ 1665 static int 1666 ieee80211_fragment(struct ieee80211vap *vap, struct mbuf *m0, 1667 u_int hdrsize, u_int ciphdrsize, u_int mtu) 1668 { 1669 struct ieee80211com *ic = vap->iv_ic; 1670 struct ieee80211_frame *wh, *whf; 1671 struct mbuf *m, *prev, *next; 1672 u_int totalhdrsize, fragno, fragsize, off, remainder, payload; 1673 u_int hdrspace; 1674 1675 KASSERT(m0->m_nextpkt == NULL, ("mbuf already chained?")); 1676 KASSERT(m0->m_pkthdr.len > mtu, 1677 ("pktlen %u mtu %u", m0->m_pkthdr.len, mtu)); 1678 1679 /* 1680 * Honor driver DATAPAD requirement. 1681 */ 1682 if (ic->ic_flags & IEEE80211_F_DATAPAD) 1683 hdrspace = roundup(hdrsize, sizeof(uint32_t)); 1684 else 1685 hdrspace = hdrsize; 1686 1687 wh = mtod(m0, struct ieee80211_frame *); 1688 /* NB: mark the first frag; it will be propagated below */ 1689 wh->i_fc[1] |= IEEE80211_FC1_MORE_FRAG; 1690 totalhdrsize = hdrspace + ciphdrsize; 1691 fragno = 1; 1692 off = mtu - ciphdrsize; 1693 remainder = m0->m_pkthdr.len - off; 1694 prev = m0; 1695 do { 1696 fragsize = totalhdrsize + remainder; 1697 if (fragsize > mtu) 1698 fragsize = mtu; 1699 /* XXX fragsize can be >2048! */ 1700 KASSERT(fragsize < MCLBYTES, 1701 ("fragment size %u too big!", fragsize)); 1702 if (fragsize > MHLEN) 1703 m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR); 1704 else 1705 m = m_gethdr(M_NOWAIT, MT_DATA); 1706 if (m == NULL) 1707 goto bad; 1708 /* leave room to prepend any cipher header */ 1709 m_align(m, fragsize - ciphdrsize); 1710 1711 /* 1712 * Form the header in the fragment. Note that since 1713 * we mark the first fragment with the MORE_FRAG bit 1714 * it automatically is propagated to each fragment; we 1715 * need only clear it on the last fragment (done below). 1716 * NB: frag 1+ dont have Mesh Control field present. 1717 */ 1718 whf = mtod(m, struct ieee80211_frame *); 1719 memcpy(whf, wh, hdrsize); 1720 #ifdef IEEE80211_SUPPORT_MESH 1721 if (vap->iv_opmode == IEEE80211_M_MBSS) { 1722 if (IEEE80211_IS_DSTODS(wh)) 1723 ((struct ieee80211_qosframe_addr4 *) 1724 whf)->i_qos[1] &= ~IEEE80211_QOS_MC; 1725 else 1726 ((struct ieee80211_qosframe *) 1727 whf)->i_qos[1] &= ~IEEE80211_QOS_MC; 1728 } 1729 #endif 1730 *(uint16_t *)&whf->i_seq[0] |= htole16( 1731 (fragno & IEEE80211_SEQ_FRAG_MASK) << 1732 IEEE80211_SEQ_FRAG_SHIFT); 1733 fragno++; 1734 1735 payload = fragsize - totalhdrsize; 1736 /* NB: destination is known to be contiguous */ 1737 1738 m_copydata(m0, off, payload, mtod(m, uint8_t *) + hdrspace); 1739 m->m_len = hdrspace + payload; 1740 m->m_pkthdr.len = hdrspace + payload; 1741 m->m_flags |= M_FRAG; 1742 1743 /* chain up the fragment */ 1744 prev->m_nextpkt = m; 1745 prev = m; 1746 1747 /* deduct fragment just formed */ 1748 remainder -= payload; 1749 off += payload; 1750 } while (remainder != 0); 1751 1752 /* set the last fragment */ 1753 m->m_flags |= M_LASTFRAG; 1754 whf->i_fc[1] &= ~IEEE80211_FC1_MORE_FRAG; 1755 1756 /* strip first mbuf now that everything has been copied */ 1757 m_adj(m0, -(m0->m_pkthdr.len - (mtu - ciphdrsize))); 1758 m0->m_flags |= M_FIRSTFRAG | M_FRAG; 1759 1760 vap->iv_stats.is_tx_fragframes++; 1761 vap->iv_stats.is_tx_frags += fragno-1; 1762 1763 return 1; 1764 bad: 1765 /* reclaim fragments but leave original frame for caller to free */ 1766 for (m = m0->m_nextpkt; m != NULL; m = next) { 1767 next = m->m_nextpkt; 1768 m->m_nextpkt = NULL; /* XXX paranoid */ 1769 m_freem(m); 1770 } 1771 m0->m_nextpkt = NULL; 1772 return 0; 1773 } 1774 1775 /* 1776 * Add a supported rates element id to a frame. 1777 */ 1778 uint8_t * 1779 ieee80211_add_rates(uint8_t *frm, const struct ieee80211_rateset *rs) 1780 { 1781 int nrates; 1782 1783 *frm++ = IEEE80211_ELEMID_RATES; 1784 nrates = rs->rs_nrates; 1785 if (nrates > IEEE80211_RATE_SIZE) 1786 nrates = IEEE80211_RATE_SIZE; 1787 *frm++ = nrates; 1788 memcpy(frm, rs->rs_rates, nrates); 1789 return frm + nrates; 1790 } 1791 1792 /* 1793 * Add an extended supported rates element id to a frame. 1794 */ 1795 uint8_t * 1796 ieee80211_add_xrates(uint8_t *frm, const struct ieee80211_rateset *rs) 1797 { 1798 /* 1799 * Add an extended supported rates element if operating in 11g mode. 1800 */ 1801 if (rs->rs_nrates > IEEE80211_RATE_SIZE) { 1802 int nrates = rs->rs_nrates - IEEE80211_RATE_SIZE; 1803 *frm++ = IEEE80211_ELEMID_XRATES; 1804 *frm++ = nrates; 1805 memcpy(frm, rs->rs_rates + IEEE80211_RATE_SIZE, nrates); 1806 frm += nrates; 1807 } 1808 return frm; 1809 } 1810 1811 /* 1812 * Add an ssid element to a frame. 1813 */ 1814 uint8_t * 1815 ieee80211_add_ssid(uint8_t *frm, const uint8_t *ssid, u_int len) 1816 { 1817 *frm++ = IEEE80211_ELEMID_SSID; 1818 *frm++ = len; 1819 memcpy(frm, ssid, len); 1820 return frm + len; 1821 } 1822 1823 /* 1824 * Add an erp element to a frame. 1825 */ 1826 static uint8_t * 1827 ieee80211_add_erp(uint8_t *frm, struct ieee80211com *ic) 1828 { 1829 uint8_t erp; 1830 1831 *frm++ = IEEE80211_ELEMID_ERP; 1832 *frm++ = 1; 1833 erp = 0; 1834 if (ic->ic_nonerpsta != 0) 1835 erp |= IEEE80211_ERP_NON_ERP_PRESENT; 1836 if (ic->ic_flags & IEEE80211_F_USEPROT) 1837 erp |= IEEE80211_ERP_USE_PROTECTION; 1838 if (ic->ic_flags & IEEE80211_F_USEBARKER) 1839 erp |= IEEE80211_ERP_LONG_PREAMBLE; 1840 *frm++ = erp; 1841 return frm; 1842 } 1843 1844 /* 1845 * Add a CFParams element to a frame. 1846 */ 1847 static uint8_t * 1848 ieee80211_add_cfparms(uint8_t *frm, struct ieee80211com *ic) 1849 { 1850 #define ADDSHORT(frm, v) do { \ 1851 LE_WRITE_2(frm, v); \ 1852 frm += 2; \ 1853 } while (0) 1854 *frm++ = IEEE80211_ELEMID_CFPARMS; 1855 *frm++ = 6; 1856 *frm++ = 0; /* CFP count */ 1857 *frm++ = 2; /* CFP period */ 1858 ADDSHORT(frm, 0); /* CFP MaxDuration (TU) */ 1859 ADDSHORT(frm, 0); /* CFP CurRemaining (TU) */ 1860 return frm; 1861 #undef ADDSHORT 1862 } 1863 1864 static __inline uint8_t * 1865 add_appie(uint8_t *frm, const struct ieee80211_appie *ie) 1866 { 1867 memcpy(frm, ie->ie_data, ie->ie_len); 1868 return frm + ie->ie_len; 1869 } 1870 1871 static __inline uint8_t * 1872 add_ie(uint8_t *frm, const uint8_t *ie) 1873 { 1874 memcpy(frm, ie, 2 + ie[1]); 1875 return frm + 2 + ie[1]; 1876 } 1877 1878 #define WME_OUI_BYTES 0x00, 0x50, 0xf2 1879 /* 1880 * Add a WME information element to a frame. 1881 */ 1882 static uint8_t * 1883 ieee80211_add_wme_info(uint8_t *frm, struct ieee80211_wme_state *wme) 1884 { 1885 static const struct ieee80211_wme_info info = { 1886 .wme_id = IEEE80211_ELEMID_VENDOR, 1887 .wme_len = sizeof(struct ieee80211_wme_info) - 2, 1888 .wme_oui = { WME_OUI_BYTES }, 1889 .wme_type = WME_OUI_TYPE, 1890 .wme_subtype = WME_INFO_OUI_SUBTYPE, 1891 .wme_version = WME_VERSION, 1892 .wme_info = 0, 1893 }; 1894 memcpy(frm, &info, sizeof(info)); 1895 return frm + sizeof(info); 1896 } 1897 1898 /* 1899 * Add a WME parameters element to a frame. 1900 */ 1901 static uint8_t * 1902 ieee80211_add_wme_param(uint8_t *frm, struct ieee80211_wme_state *wme) 1903 { 1904 #define SM(_v, _f) (((_v) << _f##_S) & _f) 1905 #define ADDSHORT(frm, v) do { \ 1906 LE_WRITE_2(frm, v); \ 1907 frm += 2; \ 1908 } while (0) 1909 /* NB: this works 'cuz a param has an info at the front */ 1910 static const struct ieee80211_wme_info param = { 1911 .wme_id = IEEE80211_ELEMID_VENDOR, 1912 .wme_len = sizeof(struct ieee80211_wme_param) - 2, 1913 .wme_oui = { WME_OUI_BYTES }, 1914 .wme_type = WME_OUI_TYPE, 1915 .wme_subtype = WME_PARAM_OUI_SUBTYPE, 1916 .wme_version = WME_VERSION, 1917 }; 1918 int i; 1919 1920 memcpy(frm, ¶m, sizeof(param)); 1921 frm += __offsetof(struct ieee80211_wme_info, wme_info); 1922 *frm++ = wme->wme_bssChanParams.cap_info; /* AC info */ 1923 *frm++ = 0; /* reserved field */ 1924 for (i = 0; i < WME_NUM_AC; i++) { 1925 const struct wmeParams *ac = 1926 &wme->wme_bssChanParams.cap_wmeParams[i]; 1927 *frm++ = SM(i, WME_PARAM_ACI) 1928 | SM(ac->wmep_acm, WME_PARAM_ACM) 1929 | SM(ac->wmep_aifsn, WME_PARAM_AIFSN) 1930 ; 1931 *frm++ = SM(ac->wmep_logcwmax, WME_PARAM_LOGCWMAX) 1932 | SM(ac->wmep_logcwmin, WME_PARAM_LOGCWMIN) 1933 ; 1934 ADDSHORT(frm, ac->wmep_txopLimit); 1935 } 1936 return frm; 1937 #undef SM 1938 #undef ADDSHORT 1939 } 1940 #undef WME_OUI_BYTES 1941 1942 /* 1943 * Add an 11h Power Constraint element to a frame. 1944 */ 1945 static uint8_t * 1946 ieee80211_add_powerconstraint(uint8_t *frm, struct ieee80211vap *vap) 1947 { 1948 const struct ieee80211_channel *c = vap->iv_bss->ni_chan; 1949 /* XXX per-vap tx power limit? */ 1950 int8_t limit = vap->iv_ic->ic_txpowlimit / 2; 1951 1952 frm[0] = IEEE80211_ELEMID_PWRCNSTR; 1953 frm[1] = 1; 1954 frm[2] = c->ic_maxregpower > limit ? c->ic_maxregpower - limit : 0; 1955 return frm + 3; 1956 } 1957 1958 /* 1959 * Add an 11h Power Capability element to a frame. 1960 */ 1961 static uint8_t * 1962 ieee80211_add_powercapability(uint8_t *frm, const struct ieee80211_channel *c) 1963 { 1964 frm[0] = IEEE80211_ELEMID_PWRCAP; 1965 frm[1] = 2; 1966 frm[2] = c->ic_minpower; 1967 frm[3] = c->ic_maxpower; 1968 return frm + 4; 1969 } 1970 1971 /* 1972 * Add an 11h Supported Channels element to a frame. 1973 */ 1974 static uint8_t * 1975 ieee80211_add_supportedchannels(uint8_t *frm, struct ieee80211com *ic) 1976 { 1977 static const int ielen = 26; 1978 1979 frm[0] = IEEE80211_ELEMID_SUPPCHAN; 1980 frm[1] = ielen; 1981 /* XXX not correct */ 1982 memcpy(frm+2, ic->ic_chan_avail, ielen); 1983 return frm + 2 + ielen; 1984 } 1985 1986 /* 1987 * Add an 11h Quiet time element to a frame. 1988 */ 1989 static uint8_t * 1990 ieee80211_add_quiet(uint8_t *frm, struct ieee80211vap *vap) 1991 { 1992 struct ieee80211_quiet_ie *quiet = (struct ieee80211_quiet_ie *) frm; 1993 1994 quiet->quiet_ie = IEEE80211_ELEMID_QUIET; 1995 quiet->len = 6; 1996 if (vap->iv_quiet_count_value == 1) 1997 vap->iv_quiet_count_value = vap->iv_quiet_count; 1998 else if (vap->iv_quiet_count_value > 1) 1999 vap->iv_quiet_count_value--; 2000 2001 if (vap->iv_quiet_count_value == 0) { 2002 /* value 0 is reserved as per 802.11h standerd */ 2003 vap->iv_quiet_count_value = 1; 2004 } 2005 2006 quiet->tbttcount = vap->iv_quiet_count_value; 2007 quiet->period = vap->iv_quiet_period; 2008 quiet->duration = htole16(vap->iv_quiet_duration); 2009 quiet->offset = htole16(vap->iv_quiet_offset); 2010 return frm + sizeof(*quiet); 2011 } 2012 2013 /* 2014 * Add an 11h Channel Switch Announcement element to a frame. 2015 * Note that we use the per-vap CSA count to adjust the global 2016 * counter so we can use this routine to form probe response 2017 * frames and get the current count. 2018 */ 2019 static uint8_t * 2020 ieee80211_add_csa(uint8_t *frm, struct ieee80211vap *vap) 2021 { 2022 struct ieee80211com *ic = vap->iv_ic; 2023 struct ieee80211_csa_ie *csa = (struct ieee80211_csa_ie *) frm; 2024 2025 csa->csa_ie = IEEE80211_ELEMID_CSA; 2026 csa->csa_len = 3; 2027 csa->csa_mode = 1; /* XXX force quiet on channel */ 2028 csa->csa_newchan = ieee80211_chan2ieee(ic, ic->ic_csa_newchan); 2029 csa->csa_count = ic->ic_csa_count - vap->iv_csa_count; 2030 return frm + sizeof(*csa); 2031 } 2032 2033 /* 2034 * Add an 11h country information element to a frame. 2035 */ 2036 static uint8_t * 2037 ieee80211_add_countryie(uint8_t *frm, struct ieee80211com *ic) 2038 { 2039 2040 if (ic->ic_countryie == NULL || 2041 ic->ic_countryie_chan != ic->ic_bsschan) { 2042 /* 2043 * Handle lazy construction of ie. This is done on 2044 * first use and after a channel change that requires 2045 * re-calculation. 2046 */ 2047 if (ic->ic_countryie != NULL) 2048 kfree(ic->ic_countryie, M_80211_NODE_IE); 2049 ic->ic_countryie = ieee80211_alloc_countryie(ic); 2050 if (ic->ic_countryie == NULL) 2051 return frm; 2052 ic->ic_countryie_chan = ic->ic_bsschan; 2053 } 2054 return add_appie(frm, ic->ic_countryie); 2055 } 2056 2057 uint8_t * 2058 ieee80211_add_wpa(uint8_t *frm, const struct ieee80211vap *vap) 2059 { 2060 if (vap->iv_flags & IEEE80211_F_WPA1 && vap->iv_wpa_ie != NULL) 2061 return (add_ie(frm, vap->iv_wpa_ie)); 2062 else { 2063 /* XXX else complain? */ 2064 return (frm); 2065 } 2066 } 2067 2068 uint8_t * 2069 ieee80211_add_rsn(uint8_t *frm, const struct ieee80211vap *vap) 2070 { 2071 if (vap->iv_flags & IEEE80211_F_WPA2 && vap->iv_rsn_ie != NULL) 2072 return (add_ie(frm, vap->iv_rsn_ie)); 2073 else { 2074 /* XXX else complain? */ 2075 return (frm); 2076 } 2077 } 2078 2079 uint8_t * 2080 ieee80211_add_qos(uint8_t *frm, const struct ieee80211_node *ni) 2081 { 2082 if (ni->ni_flags & IEEE80211_NODE_QOS) { 2083 *frm++ = IEEE80211_ELEMID_QOS; 2084 *frm++ = 1; 2085 *frm++ = 0; 2086 } 2087 2088 return (frm); 2089 } 2090 2091 /* 2092 * Send a probe request frame with the specified ssid 2093 * and any optional information element data. 2094 */ 2095 int 2096 ieee80211_send_probereq(struct ieee80211_node *ni, 2097 const uint8_t sa[IEEE80211_ADDR_LEN], 2098 const uint8_t da[IEEE80211_ADDR_LEN], 2099 const uint8_t bssid[IEEE80211_ADDR_LEN], 2100 const uint8_t *ssid, size_t ssidlen) 2101 { 2102 struct ieee80211vap *vap = ni->ni_vap; 2103 struct ieee80211com *ic = ni->ni_ic; 2104 const struct ieee80211_txparam *tp; 2105 struct ieee80211_bpf_params params; 2106 struct ieee80211_frame *wh; 2107 const struct ieee80211_rateset *rs; 2108 struct mbuf *m; 2109 uint8_t *frm; 2110 int ret; 2111 2112 if (vap->iv_state == IEEE80211_S_CAC) { 2113 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni, 2114 "block %s frame in CAC state", "probe request"); 2115 vap->iv_stats.is_tx_badstate++; 2116 return EIO; /* XXX */ 2117 } 2118 2119 /* 2120 * Hold a reference on the node so it doesn't go away until after 2121 * the xmit is complete all the way in the driver. On error we 2122 * will remove our reference. 2123 */ 2124 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2125 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", 2126 __func__, __LINE__, 2127 ni, ether_sprintf(ni->ni_macaddr), 2128 ieee80211_node_refcnt(ni)+1); 2129 ieee80211_ref_node(ni); 2130 2131 /* 2132 * prreq frame format 2133 * [tlv] ssid 2134 * [tlv] supported rates 2135 * [tlv] RSN (optional) 2136 * [tlv] extended supported rates 2137 * [tlv] WPA (optional) 2138 * [tlv] user-specified ie's 2139 */ 2140 m = ieee80211_getmgtframe(&frm, 2141 ic->ic_headroom + sizeof(struct ieee80211_frame), 2142 2 + IEEE80211_NWID_LEN 2143 + 2 + IEEE80211_RATE_SIZE 2144 + sizeof(struct ieee80211_ie_wpa) 2145 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2146 + sizeof(struct ieee80211_ie_wpa) 2147 + (vap->iv_appie_probereq != NULL ? 2148 vap->iv_appie_probereq->ie_len : 0) 2149 ); 2150 if (m == NULL) { 2151 vap->iv_stats.is_tx_nobuf++; 2152 ieee80211_free_node(ni); 2153 return ENOMEM; 2154 } 2155 2156 frm = ieee80211_add_ssid(frm, ssid, ssidlen); 2157 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2158 frm = ieee80211_add_rates(frm, rs); 2159 frm = ieee80211_add_rsn(frm, vap); 2160 frm = ieee80211_add_xrates(frm, rs); 2161 frm = ieee80211_add_wpa(frm, vap); 2162 if (vap->iv_appie_probereq != NULL) 2163 frm = add_appie(frm, vap->iv_appie_probereq); 2164 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2165 2166 KASSERT(M_LEADINGSPACE(m) >= sizeof(struct ieee80211_frame), 2167 ("leading space %zd", M_LEADINGSPACE(m))); 2168 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); 2169 if (m == NULL) { 2170 /* NB: cannot happen */ 2171 ieee80211_free_node(ni); 2172 return ENOMEM; 2173 } 2174 2175 IEEE80211_TX_LOCK(ic); 2176 wh = mtod(m, struct ieee80211_frame *); 2177 ieee80211_send_setup(ni, m, 2178 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ, 2179 IEEE80211_NONQOS_TID, sa, da, bssid); 2180 /* XXX power management? */ 2181 m->m_flags |= M_ENCAP; /* mark encapsulated */ 2182 2183 M_WME_SETAC(m, WME_AC_BE); 2184 2185 IEEE80211_NODE_STAT(ni, tx_probereq); 2186 IEEE80211_NODE_STAT(ni, tx_mgmt); 2187 2188 IEEE80211_DPRINTF(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS, 2189 "send probe req on channel %u bssid %s ssid \"%.*s\"\n", 2190 ieee80211_chan2ieee(ic, ic->ic_curchan), ether_sprintf(bssid), 2191 (int)ssidlen, ssid); 2192 2193 memset(¶ms, 0, sizeof(params)); 2194 params.ibp_pri = M_WME_GETAC(m); 2195 tp = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)]; 2196 params.ibp_rate0 = tp->mgmtrate; 2197 if (IEEE80211_IS_MULTICAST(da)) { 2198 params.ibp_flags |= IEEE80211_BPF_NOACK; 2199 params.ibp_try0 = 1; 2200 } else 2201 params.ibp_try0 = tp->maxretry; 2202 params.ibp_power = ni->ni_txpower; 2203 ret = ieee80211_raw_output(vap, ni, m, ¶ms); 2204 IEEE80211_TX_UNLOCK(ic); 2205 return (ret); 2206 } 2207 2208 /* 2209 * Calculate capability information for mgt frames. 2210 */ 2211 uint16_t 2212 ieee80211_getcapinfo(struct ieee80211vap *vap, struct ieee80211_channel *chan) 2213 { 2214 struct ieee80211com *ic = vap->iv_ic; 2215 uint16_t capinfo; 2216 2217 KASSERT(vap->iv_opmode != IEEE80211_M_STA, ("station mode")); 2218 2219 if (vap->iv_opmode == IEEE80211_M_HOSTAP) 2220 capinfo = IEEE80211_CAPINFO_ESS; 2221 else if (vap->iv_opmode == IEEE80211_M_IBSS) 2222 capinfo = IEEE80211_CAPINFO_IBSS; 2223 else 2224 capinfo = 0; 2225 if (vap->iv_flags & IEEE80211_F_PRIVACY) 2226 capinfo |= IEEE80211_CAPINFO_PRIVACY; 2227 if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && 2228 IEEE80211_IS_CHAN_2GHZ(chan)) 2229 capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE; 2230 if (ic->ic_flags & IEEE80211_F_SHSLOT) 2231 capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME; 2232 if (IEEE80211_IS_CHAN_5GHZ(chan) && (vap->iv_flags & IEEE80211_F_DOTH)) 2233 capinfo |= IEEE80211_CAPINFO_SPECTRUM_MGMT; 2234 return capinfo; 2235 } 2236 2237 /* 2238 * Send a management frame. The node is for the destination (or ic_bss 2239 * when in station mode). Nodes other than ic_bss have their reference 2240 * count bumped to reflect our use for an indeterminant time. 2241 */ 2242 int 2243 ieee80211_send_mgmt(struct ieee80211_node *ni, int type, int arg) 2244 { 2245 #define HTFLAGS (IEEE80211_NODE_HT | IEEE80211_NODE_HTCOMPAT) 2246 #define senderr(_x, _v) do { vap->iv_stats._v++; ret = _x; goto bad; } while (0) 2247 struct ieee80211vap *vap = ni->ni_vap; 2248 struct ieee80211com *ic = ni->ni_ic; 2249 struct ieee80211_node *bss = vap->iv_bss; 2250 struct ieee80211_bpf_params params; 2251 struct mbuf *m; 2252 uint8_t *frm; 2253 uint16_t capinfo; 2254 int has_challenge, is_shared_key, ret, status; 2255 2256 KASSERT(ni != NULL, ("null node")); 2257 2258 /* 2259 * Hold a reference on the node so it doesn't go away until after 2260 * the xmit is complete all the way in the driver. On error we 2261 * will remove our reference. 2262 */ 2263 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2264 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", 2265 __func__, __LINE__, 2266 ni, ether_sprintf(ni->ni_macaddr), 2267 ieee80211_node_refcnt(ni)+1); 2268 ieee80211_ref_node(ni); 2269 2270 memset(¶ms, 0, sizeof(params)); 2271 switch (type) { 2272 2273 case IEEE80211_FC0_SUBTYPE_AUTH: 2274 status = arg >> 16; 2275 arg &= 0xffff; 2276 has_challenge = ((arg == IEEE80211_AUTH_SHARED_CHALLENGE || 2277 arg == IEEE80211_AUTH_SHARED_RESPONSE) && 2278 ni->ni_challenge != NULL); 2279 2280 /* 2281 * Deduce whether we're doing open authentication or 2282 * shared key authentication. We do the latter if 2283 * we're in the middle of a shared key authentication 2284 * handshake or if we're initiating an authentication 2285 * request and configured to use shared key. 2286 */ 2287 is_shared_key = has_challenge || 2288 arg >= IEEE80211_AUTH_SHARED_RESPONSE || 2289 (arg == IEEE80211_AUTH_SHARED_REQUEST && 2290 bss->ni_authmode == IEEE80211_AUTH_SHARED); 2291 2292 m = ieee80211_getmgtframe(&frm, 2293 ic->ic_headroom + sizeof(struct ieee80211_frame), 2294 3 * sizeof(uint16_t) 2295 + (has_challenge && status == IEEE80211_STATUS_SUCCESS ? 2296 sizeof(uint16_t)+IEEE80211_CHALLENGE_LEN : 0) 2297 ); 2298 if (m == NULL) 2299 senderr(ENOMEM, is_tx_nobuf); 2300 2301 ((uint16_t *)frm)[0] = 2302 (is_shared_key) ? htole16(IEEE80211_AUTH_ALG_SHARED) 2303 : htole16(IEEE80211_AUTH_ALG_OPEN); 2304 ((uint16_t *)frm)[1] = htole16(arg); /* sequence number */ 2305 ((uint16_t *)frm)[2] = htole16(status);/* status */ 2306 2307 if (has_challenge && status == IEEE80211_STATUS_SUCCESS) { 2308 ((uint16_t *)frm)[3] = 2309 htole16((IEEE80211_CHALLENGE_LEN << 8) | 2310 IEEE80211_ELEMID_CHALLENGE); 2311 memcpy(&((uint16_t *)frm)[4], ni->ni_challenge, 2312 IEEE80211_CHALLENGE_LEN); 2313 m->m_pkthdr.len = m->m_len = 2314 4 * sizeof(uint16_t) + IEEE80211_CHALLENGE_LEN; 2315 if (arg == IEEE80211_AUTH_SHARED_RESPONSE) { 2316 IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni, 2317 "request encrypt frame (%s)", __func__); 2318 /* mark frame for encryption */ 2319 params.ibp_flags |= IEEE80211_BPF_CRYPTO; 2320 } 2321 } else 2322 m->m_pkthdr.len = m->m_len = 3 * sizeof(uint16_t); 2323 2324 /* XXX not right for shared key */ 2325 if (status == IEEE80211_STATUS_SUCCESS) 2326 IEEE80211_NODE_STAT(ni, tx_auth); 2327 else 2328 IEEE80211_NODE_STAT(ni, tx_auth_fail); 2329 2330 if (vap->iv_opmode == IEEE80211_M_STA) 2331 ieee80211_add_callback(m, ieee80211_tx_mgt_cb, 2332 (void *) vap->iv_state); 2333 break; 2334 2335 case IEEE80211_FC0_SUBTYPE_DEAUTH: 2336 IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni, 2337 "send station deauthenticate (reason %d)", arg); 2338 m = ieee80211_getmgtframe(&frm, 2339 ic->ic_headroom + sizeof(struct ieee80211_frame), 2340 sizeof(uint16_t)); 2341 if (m == NULL) 2342 senderr(ENOMEM, is_tx_nobuf); 2343 *(uint16_t *)frm = htole16(arg); /* reason */ 2344 m->m_pkthdr.len = m->m_len = sizeof(uint16_t); 2345 2346 IEEE80211_NODE_STAT(ni, tx_deauth); 2347 IEEE80211_NODE_STAT_SET(ni, tx_deauth_code, arg); 2348 2349 ieee80211_node_unauthorize(ni); /* port closed */ 2350 break; 2351 2352 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 2353 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 2354 /* 2355 * asreq frame format 2356 * [2] capability information 2357 * [2] listen interval 2358 * [6*] current AP address (reassoc only) 2359 * [tlv] ssid 2360 * [tlv] supported rates 2361 * [tlv] extended supported rates 2362 * [4] power capability (optional) 2363 * [28] supported channels (optional) 2364 * [tlv] HT capabilities 2365 * [tlv] WME (optional) 2366 * [tlv] Vendor OUI HT capabilities (optional) 2367 * [tlv] Atheros capabilities (if negotiated) 2368 * [tlv] AppIE's (optional) 2369 */ 2370 m = ieee80211_getmgtframe(&frm, 2371 ic->ic_headroom + sizeof(struct ieee80211_frame), 2372 sizeof(uint16_t) 2373 + sizeof(uint16_t) 2374 + IEEE80211_ADDR_LEN 2375 + 2 + IEEE80211_NWID_LEN 2376 + 2 + IEEE80211_RATE_SIZE 2377 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2378 + 4 2379 + 2 + 26 2380 + sizeof(struct ieee80211_wme_info) 2381 + sizeof(struct ieee80211_ie_htcap) 2382 + 4 + sizeof(struct ieee80211_ie_htcap) 2383 #ifdef IEEE80211_SUPPORT_SUPERG 2384 + sizeof(struct ieee80211_ath_ie) 2385 #endif 2386 + (vap->iv_appie_wpa != NULL ? 2387 vap->iv_appie_wpa->ie_len : 0) 2388 + (vap->iv_appie_assocreq != NULL ? 2389 vap->iv_appie_assocreq->ie_len : 0) 2390 ); 2391 if (m == NULL) 2392 senderr(ENOMEM, is_tx_nobuf); 2393 2394 KASSERT(vap->iv_opmode == IEEE80211_M_STA, 2395 ("wrong mode %u", vap->iv_opmode)); 2396 capinfo = IEEE80211_CAPINFO_ESS; 2397 if (vap->iv_flags & IEEE80211_F_PRIVACY) 2398 capinfo |= IEEE80211_CAPINFO_PRIVACY; 2399 /* 2400 * NB: Some 11a AP's reject the request when 2401 * short premable is set. 2402 */ 2403 if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && 2404 IEEE80211_IS_CHAN_2GHZ(ic->ic_curchan)) 2405 capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE; 2406 if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 2407 (ic->ic_caps & IEEE80211_C_SHSLOT)) 2408 capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME; 2409 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SPECTRUM_MGMT) && 2410 (vap->iv_flags & IEEE80211_F_DOTH)) 2411 capinfo |= IEEE80211_CAPINFO_SPECTRUM_MGMT; 2412 *(uint16_t *)frm = htole16(capinfo); 2413 frm += 2; 2414 2415 KASSERT(bss->ni_intval != 0, ("beacon interval is zero!")); 2416 *(uint16_t *)frm = htole16(howmany(ic->ic_lintval, 2417 bss->ni_intval)); 2418 frm += 2; 2419 2420 if (type == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) { 2421 IEEE80211_ADDR_COPY(frm, bss->ni_bssid); 2422 frm += IEEE80211_ADDR_LEN; 2423 } 2424 2425 frm = ieee80211_add_ssid(frm, ni->ni_essid, ni->ni_esslen); 2426 frm = ieee80211_add_rates(frm, &ni->ni_rates); 2427 frm = ieee80211_add_rsn(frm, vap); 2428 frm = ieee80211_add_xrates(frm, &ni->ni_rates); 2429 if (capinfo & IEEE80211_CAPINFO_SPECTRUM_MGMT) { 2430 frm = ieee80211_add_powercapability(frm, 2431 ic->ic_curchan); 2432 frm = ieee80211_add_supportedchannels(frm, ic); 2433 } 2434 if ((vap->iv_flags_ht & IEEE80211_FHT_HT) && 2435 ni->ni_ies.htcap_ie != NULL && 2436 ni->ni_ies.htcap_ie[0] == IEEE80211_ELEMID_HTCAP) 2437 frm = ieee80211_add_htcap(frm, ni); 2438 frm = ieee80211_add_wpa(frm, vap); 2439 if ((ic->ic_flags & IEEE80211_F_WME) && 2440 ni->ni_ies.wme_ie != NULL) 2441 frm = ieee80211_add_wme_info(frm, &ic->ic_wme); 2442 if ((vap->iv_flags_ht & IEEE80211_FHT_HT) && 2443 ni->ni_ies.htcap_ie != NULL && 2444 ni->ni_ies.htcap_ie[0] == IEEE80211_ELEMID_VENDOR) 2445 frm = ieee80211_add_htcap_vendor(frm, ni); 2446 #ifdef IEEE80211_SUPPORT_SUPERG 2447 if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS)) { 2448 frm = ieee80211_add_ath(frm, 2449 IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS), 2450 ((vap->iv_flags & IEEE80211_F_WPA) == 0 && 2451 ni->ni_authmode != IEEE80211_AUTH_8021X) ? 2452 vap->iv_def_txkey : IEEE80211_KEYIX_NONE); 2453 } 2454 #endif /* IEEE80211_SUPPORT_SUPERG */ 2455 if (vap->iv_appie_assocreq != NULL) 2456 frm = add_appie(frm, vap->iv_appie_assocreq); 2457 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2458 2459 ieee80211_add_callback(m, ieee80211_tx_mgt_cb, 2460 (void *) vap->iv_state); 2461 break; 2462 2463 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 2464 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 2465 /* 2466 * asresp frame format 2467 * [2] capability information 2468 * [2] status 2469 * [2] association ID 2470 * [tlv] supported rates 2471 * [tlv] extended supported rates 2472 * [tlv] HT capabilities (standard, if STA enabled) 2473 * [tlv] HT information (standard, if STA enabled) 2474 * [tlv] WME (if configured and STA enabled) 2475 * [tlv] HT capabilities (vendor OUI, if STA enabled) 2476 * [tlv] HT information (vendor OUI, if STA enabled) 2477 * [tlv] Atheros capabilities (if STA enabled) 2478 * [tlv] AppIE's (optional) 2479 */ 2480 m = ieee80211_getmgtframe(&frm, 2481 ic->ic_headroom + sizeof(struct ieee80211_frame), 2482 sizeof(uint16_t) 2483 + sizeof(uint16_t) 2484 + sizeof(uint16_t) 2485 + 2 + IEEE80211_RATE_SIZE 2486 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2487 + sizeof(struct ieee80211_ie_htcap) + 4 2488 + sizeof(struct ieee80211_ie_htinfo) + 4 2489 + sizeof(struct ieee80211_wme_param) 2490 #ifdef IEEE80211_SUPPORT_SUPERG 2491 + sizeof(struct ieee80211_ath_ie) 2492 #endif 2493 + (vap->iv_appie_assocresp != NULL ? 2494 vap->iv_appie_assocresp->ie_len : 0) 2495 ); 2496 if (m == NULL) 2497 senderr(ENOMEM, is_tx_nobuf); 2498 2499 capinfo = ieee80211_getcapinfo(vap, bss->ni_chan); 2500 *(uint16_t *)frm = htole16(capinfo); 2501 frm += 2; 2502 2503 *(uint16_t *)frm = htole16(arg); /* status */ 2504 frm += 2; 2505 2506 if (arg == IEEE80211_STATUS_SUCCESS) { 2507 *(uint16_t *)frm = htole16(ni->ni_associd); 2508 IEEE80211_NODE_STAT(ni, tx_assoc); 2509 } else 2510 IEEE80211_NODE_STAT(ni, tx_assoc_fail); 2511 frm += 2; 2512 2513 frm = ieee80211_add_rates(frm, &ni->ni_rates); 2514 frm = ieee80211_add_xrates(frm, &ni->ni_rates); 2515 /* NB: respond according to what we received */ 2516 if ((ni->ni_flags & HTFLAGS) == IEEE80211_NODE_HT) { 2517 frm = ieee80211_add_htcap(frm, ni); 2518 frm = ieee80211_add_htinfo(frm, ni); 2519 } 2520 if ((vap->iv_flags & IEEE80211_F_WME) && 2521 ni->ni_ies.wme_ie != NULL) 2522 frm = ieee80211_add_wme_param(frm, &ic->ic_wme); 2523 if ((ni->ni_flags & HTFLAGS) == HTFLAGS) { 2524 frm = ieee80211_add_htcap_vendor(frm, ni); 2525 frm = ieee80211_add_htinfo_vendor(frm, ni); 2526 } 2527 #ifdef IEEE80211_SUPPORT_SUPERG 2528 if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS)) 2529 frm = ieee80211_add_ath(frm, 2530 IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS), 2531 ((vap->iv_flags & IEEE80211_F_WPA) == 0 && 2532 ni->ni_authmode != IEEE80211_AUTH_8021X) ? 2533 vap->iv_def_txkey : IEEE80211_KEYIX_NONE); 2534 #endif /* IEEE80211_SUPPORT_SUPERG */ 2535 if (vap->iv_appie_assocresp != NULL) 2536 frm = add_appie(frm, vap->iv_appie_assocresp); 2537 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2538 break; 2539 2540 case IEEE80211_FC0_SUBTYPE_DISASSOC: 2541 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 2542 "send station disassociate (reason %d)", arg); 2543 m = ieee80211_getmgtframe(&frm, 2544 ic->ic_headroom + sizeof(struct ieee80211_frame), 2545 sizeof(uint16_t)); 2546 if (m == NULL) 2547 senderr(ENOMEM, is_tx_nobuf); 2548 *(uint16_t *)frm = htole16(arg); /* reason */ 2549 m->m_pkthdr.len = m->m_len = sizeof(uint16_t); 2550 2551 IEEE80211_NODE_STAT(ni, tx_disassoc); 2552 IEEE80211_NODE_STAT_SET(ni, tx_disassoc_code, arg); 2553 break; 2554 2555 default: 2556 IEEE80211_NOTE(vap, IEEE80211_MSG_ANY, ni, 2557 "invalid mgmt frame type %u", type); 2558 senderr(EINVAL, is_tx_unknownmgt); 2559 /* NOTREACHED */ 2560 } 2561 2562 /* NB: force non-ProbeResp frames to the highest queue */ 2563 params.ibp_pri = WME_AC_VO; 2564 params.ibp_rate0 = bss->ni_txparms->mgmtrate; 2565 /* NB: we know all frames are unicast */ 2566 params.ibp_try0 = bss->ni_txparms->maxretry; 2567 params.ibp_power = bss->ni_txpower; 2568 return ieee80211_mgmt_output(ni, m, type, ¶ms); 2569 bad: 2570 ieee80211_free_node(ni); 2571 return ret; 2572 #undef senderr 2573 #undef HTFLAGS 2574 } 2575 2576 /* 2577 * Return an mbuf with a probe response frame in it. 2578 * Space is left to prepend and 802.11 header at the 2579 * front but it's left to the caller to fill in. 2580 */ 2581 struct mbuf * 2582 ieee80211_alloc_proberesp(struct ieee80211_node *bss, int legacy) 2583 { 2584 struct ieee80211vap *vap = bss->ni_vap; 2585 struct ieee80211com *ic = bss->ni_ic; 2586 const struct ieee80211_rateset *rs; 2587 struct mbuf *m; 2588 uint16_t capinfo; 2589 uint8_t *frm; 2590 2591 /* 2592 * probe response frame format 2593 * [8] time stamp 2594 * [2] beacon interval 2595 * [2] cabability information 2596 * [tlv] ssid 2597 * [tlv] supported rates 2598 * [tlv] parameter set (FH/DS) 2599 * [tlv] parameter set (IBSS) 2600 * [tlv] country (optional) 2601 * [3] power control (optional) 2602 * [5] channel switch announcement (CSA) (optional) 2603 * [tlv] extended rate phy (ERP) 2604 * [tlv] extended supported rates 2605 * [tlv] RSN (optional) 2606 * [tlv] HT capabilities 2607 * [tlv] HT information 2608 * [tlv] WPA (optional) 2609 * [tlv] WME (optional) 2610 * [tlv] Vendor OUI HT capabilities (optional) 2611 * [tlv] Vendor OUI HT information (optional) 2612 * [tlv] Atheros capabilities 2613 * [tlv] AppIE's (optional) 2614 * [tlv] Mesh ID (MBSS) 2615 * [tlv] Mesh Conf (MBSS) 2616 */ 2617 m = ieee80211_getmgtframe(&frm, 2618 ic->ic_headroom + sizeof(struct ieee80211_frame), 2619 8 2620 + sizeof(uint16_t) 2621 + sizeof(uint16_t) 2622 + 2 + IEEE80211_NWID_LEN 2623 + 2 + IEEE80211_RATE_SIZE 2624 + 7 /* max(7,3) */ 2625 + IEEE80211_COUNTRY_MAX_SIZE 2626 + 3 2627 + sizeof(struct ieee80211_csa_ie) 2628 + sizeof(struct ieee80211_quiet_ie) 2629 + 3 2630 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2631 + sizeof(struct ieee80211_ie_wpa) 2632 + sizeof(struct ieee80211_ie_htcap) 2633 + sizeof(struct ieee80211_ie_htinfo) 2634 + sizeof(struct ieee80211_ie_wpa) 2635 + sizeof(struct ieee80211_wme_param) 2636 + 4 + sizeof(struct ieee80211_ie_htcap) 2637 + 4 + sizeof(struct ieee80211_ie_htinfo) 2638 #ifdef IEEE80211_SUPPORT_SUPERG 2639 + sizeof(struct ieee80211_ath_ie) 2640 #endif 2641 #ifdef IEEE80211_SUPPORT_MESH 2642 + 2 + IEEE80211_MESHID_LEN 2643 + sizeof(struct ieee80211_meshconf_ie) 2644 #endif 2645 + (vap->iv_appie_proberesp != NULL ? 2646 vap->iv_appie_proberesp->ie_len : 0) 2647 ); 2648 if (m == NULL) { 2649 vap->iv_stats.is_tx_nobuf++; 2650 return NULL; 2651 } 2652 2653 memset(frm, 0, 8); /* timestamp should be filled later */ 2654 frm += 8; 2655 *(uint16_t *)frm = htole16(bss->ni_intval); 2656 frm += 2; 2657 capinfo = ieee80211_getcapinfo(vap, bss->ni_chan); 2658 *(uint16_t *)frm = htole16(capinfo); 2659 frm += 2; 2660 2661 frm = ieee80211_add_ssid(frm, bss->ni_essid, bss->ni_esslen); 2662 rs = ieee80211_get_suprates(ic, bss->ni_chan); 2663 frm = ieee80211_add_rates(frm, rs); 2664 2665 if (IEEE80211_IS_CHAN_FHSS(bss->ni_chan)) { 2666 *frm++ = IEEE80211_ELEMID_FHPARMS; 2667 *frm++ = 5; 2668 *frm++ = bss->ni_fhdwell & 0x00ff; 2669 *frm++ = (bss->ni_fhdwell >> 8) & 0x00ff; 2670 *frm++ = IEEE80211_FH_CHANSET( 2671 ieee80211_chan2ieee(ic, bss->ni_chan)); 2672 *frm++ = IEEE80211_FH_CHANPAT( 2673 ieee80211_chan2ieee(ic, bss->ni_chan)); 2674 *frm++ = bss->ni_fhindex; 2675 } else { 2676 *frm++ = IEEE80211_ELEMID_DSPARMS; 2677 *frm++ = 1; 2678 *frm++ = ieee80211_chan2ieee(ic, bss->ni_chan); 2679 } 2680 2681 if (vap->iv_opmode == IEEE80211_M_IBSS) { 2682 *frm++ = IEEE80211_ELEMID_IBSSPARMS; 2683 *frm++ = 2; 2684 *frm++ = 0; *frm++ = 0; /* TODO: ATIM window */ 2685 } 2686 if ((vap->iv_flags & IEEE80211_F_DOTH) || 2687 (vap->iv_flags_ext & IEEE80211_FEXT_DOTD)) 2688 frm = ieee80211_add_countryie(frm, ic); 2689 if (vap->iv_flags & IEEE80211_F_DOTH) { 2690 if (IEEE80211_IS_CHAN_5GHZ(bss->ni_chan)) 2691 frm = ieee80211_add_powerconstraint(frm, vap); 2692 if (ic->ic_flags & IEEE80211_F_CSAPENDING) 2693 frm = ieee80211_add_csa(frm, vap); 2694 } 2695 if (vap->iv_flags & IEEE80211_F_DOTH) { 2696 if (IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) && 2697 (vap->iv_flags_ext & IEEE80211_FEXT_DFS)) { 2698 if (vap->iv_quiet) 2699 frm = ieee80211_add_quiet(frm, vap); 2700 } 2701 } 2702 if (IEEE80211_IS_CHAN_ANYG(bss->ni_chan)) 2703 frm = ieee80211_add_erp(frm, ic); 2704 frm = ieee80211_add_xrates(frm, rs); 2705 frm = ieee80211_add_rsn(frm, vap); 2706 /* 2707 * NB: legacy 11b clients do not get certain ie's. 2708 * The caller identifies such clients by passing 2709 * a token in legacy to us. Could expand this to be 2710 * any legacy client for stuff like HT ie's. 2711 */ 2712 if (IEEE80211_IS_CHAN_HT(bss->ni_chan) && 2713 legacy != IEEE80211_SEND_LEGACY_11B) { 2714 frm = ieee80211_add_htcap(frm, bss); 2715 frm = ieee80211_add_htinfo(frm, bss); 2716 } 2717 frm = ieee80211_add_wpa(frm, vap); 2718 if (vap->iv_flags & IEEE80211_F_WME) 2719 frm = ieee80211_add_wme_param(frm, &ic->ic_wme); 2720 if (IEEE80211_IS_CHAN_HT(bss->ni_chan) && 2721 (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) && 2722 legacy != IEEE80211_SEND_LEGACY_11B) { 2723 frm = ieee80211_add_htcap_vendor(frm, bss); 2724 frm = ieee80211_add_htinfo_vendor(frm, bss); 2725 } 2726 #ifdef IEEE80211_SUPPORT_SUPERG 2727 if ((vap->iv_flags & IEEE80211_F_ATHEROS) && 2728 legacy != IEEE80211_SEND_LEGACY_11B) 2729 frm = ieee80211_add_athcaps(frm, bss); 2730 #endif 2731 if (vap->iv_appie_proberesp != NULL) 2732 frm = add_appie(frm, vap->iv_appie_proberesp); 2733 #ifdef IEEE80211_SUPPORT_MESH 2734 if (vap->iv_opmode == IEEE80211_M_MBSS) { 2735 frm = ieee80211_add_meshid(frm, vap); 2736 frm = ieee80211_add_meshconf(frm, vap); 2737 } 2738 #endif 2739 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2740 2741 return m; 2742 } 2743 2744 /* 2745 * Send a probe response frame to the specified mac address. 2746 * This does not go through the normal mgt frame api so we 2747 * can specify the destination address and re-use the bss node 2748 * for the sta reference. 2749 */ 2750 int 2751 ieee80211_send_proberesp(struct ieee80211vap *vap, 2752 const uint8_t da[IEEE80211_ADDR_LEN], int legacy) 2753 { 2754 struct ieee80211_node *bss = vap->iv_bss; 2755 struct ieee80211com *ic = vap->iv_ic; 2756 struct ieee80211_frame *wh; 2757 struct mbuf *m; 2758 int ret; 2759 2760 if (vap->iv_state == IEEE80211_S_CAC) { 2761 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, bss, 2762 "block %s frame in CAC state", "probe response"); 2763 vap->iv_stats.is_tx_badstate++; 2764 return EIO; /* XXX */ 2765 } 2766 2767 /* 2768 * Hold a reference on the node so it doesn't go away until after 2769 * the xmit is complete all the way in the driver. On error we 2770 * will remove our reference. 2771 */ 2772 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2773 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", 2774 __func__, __LINE__, bss, ether_sprintf(bss->ni_macaddr), 2775 ieee80211_node_refcnt(bss)+1); 2776 ieee80211_ref_node(bss); 2777 2778 m = ieee80211_alloc_proberesp(bss, legacy); 2779 if (m == NULL) { 2780 ieee80211_free_node(bss); 2781 return ENOMEM; 2782 } 2783 2784 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); 2785 KASSERT(m != NULL, ("no room for header")); 2786 2787 IEEE80211_TX_LOCK(ic); 2788 wh = mtod(m, struct ieee80211_frame *); 2789 ieee80211_send_setup(bss, m, 2790 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_RESP, 2791 IEEE80211_NONQOS_TID, vap->iv_myaddr, da, bss->ni_bssid); 2792 /* XXX power management? */ 2793 m->m_flags |= M_ENCAP; /* mark encapsulated */ 2794 2795 M_WME_SETAC(m, WME_AC_BE); 2796 2797 IEEE80211_DPRINTF(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS, 2798 "send probe resp on channel %u to %s%s\n", 2799 ieee80211_chan2ieee(ic, ic->ic_curchan), ether_sprintf(da), 2800 legacy ? " <legacy>" : ""); 2801 IEEE80211_NODE_STAT(bss, tx_mgmt); 2802 2803 ret = ieee80211_raw_output(vap, bss, m, NULL); 2804 IEEE80211_TX_UNLOCK(ic); 2805 return (ret); 2806 } 2807 2808 /* 2809 * Allocate and build a RTS (Request To Send) control frame. 2810 */ 2811 struct mbuf * 2812 ieee80211_alloc_rts(struct ieee80211com *ic, 2813 const uint8_t ra[IEEE80211_ADDR_LEN], 2814 const uint8_t ta[IEEE80211_ADDR_LEN], 2815 uint16_t dur) 2816 { 2817 struct ieee80211_frame_rts *rts; 2818 struct mbuf *m; 2819 2820 /* XXX honor ic_headroom */ 2821 m = m_gethdr(M_NOWAIT, MT_DATA); 2822 if (m != NULL) { 2823 rts = mtod(m, struct ieee80211_frame_rts *); 2824 rts->i_fc[0] = IEEE80211_FC0_VERSION_0 | 2825 IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_RTS; 2826 rts->i_fc[1] = IEEE80211_FC1_DIR_NODS; 2827 *(u_int16_t *)rts->i_dur = htole16(dur); 2828 IEEE80211_ADDR_COPY(rts->i_ra, ra); 2829 IEEE80211_ADDR_COPY(rts->i_ta, ta); 2830 2831 m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_rts); 2832 } 2833 return m; 2834 } 2835 2836 /* 2837 * Allocate and build a CTS (Clear To Send) control frame. 2838 */ 2839 struct mbuf * 2840 ieee80211_alloc_cts(struct ieee80211com *ic, 2841 const uint8_t ra[IEEE80211_ADDR_LEN], uint16_t dur) 2842 { 2843 struct ieee80211_frame_cts *cts; 2844 struct mbuf *m; 2845 2846 /* XXX honor ic_headroom */ 2847 m = m_gethdr(M_NOWAIT, MT_DATA); 2848 if (m != NULL) { 2849 cts = mtod(m, struct ieee80211_frame_cts *); 2850 cts->i_fc[0] = IEEE80211_FC0_VERSION_0 | 2851 IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_CTS; 2852 cts->i_fc[1] = IEEE80211_FC1_DIR_NODS; 2853 *(u_int16_t *)cts->i_dur = htole16(dur); 2854 IEEE80211_ADDR_COPY(cts->i_ra, ra); 2855 2856 m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_cts); 2857 } 2858 return m; 2859 } 2860 2861 static void 2862 ieee80211_tx_mgt_timeout(void *arg) 2863 { 2864 struct ieee80211vap *vap = arg; 2865 2866 IEEE80211_LOCK(vap->iv_ic); 2867 if (vap->iv_state != IEEE80211_S_INIT && 2868 (vap->iv_ic->ic_flags & IEEE80211_F_SCAN) == 0) { 2869 /* 2870 * NB: it's safe to specify a timeout as the reason here; 2871 * it'll only be used in the right state. 2872 */ 2873 ieee80211_new_state_locked(vap, IEEE80211_S_SCAN, 2874 IEEE80211_SCAN_FAIL_TIMEOUT); 2875 } 2876 IEEE80211_UNLOCK(vap->iv_ic); 2877 } 2878 2879 /* 2880 * This is the callback set on net80211-sourced transmitted 2881 * authentication request frames. 2882 * 2883 * This does a couple of things: 2884 * 2885 * + If the frame transmitted was a success, it schedules a future 2886 * event which will transition the interface to scan. 2887 * If a state transition _then_ occurs before that event occurs, 2888 * said state transition will cancel this callout. 2889 * 2890 * + If the frame transmit was a failure, it immediately schedules 2891 * the transition back to scan. 2892 */ 2893 static void 2894 ieee80211_tx_mgt_cb(struct ieee80211_node *ni, void *arg, int status) 2895 { 2896 struct ieee80211vap *vap = ni->ni_vap; 2897 enum ieee80211_state ostate = (enum ieee80211_state) arg; 2898 2899 /* 2900 * Frame transmit completed; arrange timer callback. If 2901 * transmit was successfuly we wait for response. Otherwise 2902 * we arrange an immediate callback instead of doing the 2903 * callback directly since we don't know what state the driver 2904 * is in (e.g. what locks it is holding). This work should 2905 * not be too time-critical and not happen too often so the 2906 * added overhead is acceptable. 2907 * 2908 * XXX what happens if !acked but response shows up before callback? 2909 */ 2910 if (vap->iv_state == ostate) { 2911 callout_reset(&vap->iv_mgtsend, 2912 status == 0 ? IEEE80211_TRANS_WAIT*hz : 0, 2913 ieee80211_tx_mgt_timeout, vap); 2914 } 2915 } 2916 2917 static void 2918 ieee80211_beacon_construct(struct mbuf *m, uint8_t *frm, 2919 struct ieee80211_beacon_offsets *bo, struct ieee80211_node *ni) 2920 { 2921 struct ieee80211vap *vap = ni->ni_vap; 2922 struct ieee80211com *ic = ni->ni_ic; 2923 struct ieee80211_rateset *rs = &ni->ni_rates; 2924 uint16_t capinfo; 2925 2926 /* 2927 * beacon frame format 2928 * [8] time stamp 2929 * [2] beacon interval 2930 * [2] cabability information 2931 * [tlv] ssid 2932 * [tlv] supported rates 2933 * [3] parameter set (DS) 2934 * [8] CF parameter set (optional) 2935 * [tlv] parameter set (IBSS/TIM) 2936 * [tlv] country (optional) 2937 * [3] power control (optional) 2938 * [5] channel switch announcement (CSA) (optional) 2939 * [tlv] extended rate phy (ERP) 2940 * [tlv] extended supported rates 2941 * [tlv] RSN parameters 2942 * [tlv] HT capabilities 2943 * [tlv] HT information 2944 * XXX Vendor-specific OIDs (e.g. Atheros) 2945 * [tlv] WPA parameters 2946 * [tlv] WME parameters 2947 * [tlv] Vendor OUI HT capabilities (optional) 2948 * [tlv] Vendor OUI HT information (optional) 2949 * [tlv] Atheros capabilities (optional) 2950 * [tlv] TDMA parameters (optional) 2951 * [tlv] Mesh ID (MBSS) 2952 * [tlv] Mesh Conf (MBSS) 2953 * [tlv] application data (optional) 2954 */ 2955 2956 memset(bo, 0, sizeof(*bo)); 2957 2958 memset(frm, 0, 8); /* XXX timestamp is set by hardware/driver */ 2959 frm += 8; 2960 *(uint16_t *)frm = htole16(ni->ni_intval); 2961 frm += 2; 2962 capinfo = ieee80211_getcapinfo(vap, ni->ni_chan); 2963 bo->bo_caps = (uint16_t *)frm; 2964 *(uint16_t *)frm = htole16(capinfo); 2965 frm += 2; 2966 *frm++ = IEEE80211_ELEMID_SSID; 2967 if ((vap->iv_flags & IEEE80211_F_HIDESSID) == 0) { 2968 *frm++ = ni->ni_esslen; 2969 memcpy(frm, ni->ni_essid, ni->ni_esslen); 2970 frm += ni->ni_esslen; 2971 } else 2972 *frm++ = 0; 2973 frm = ieee80211_add_rates(frm, rs); 2974 if (!IEEE80211_IS_CHAN_FHSS(ni->ni_chan)) { 2975 *frm++ = IEEE80211_ELEMID_DSPARMS; 2976 *frm++ = 1; 2977 *frm++ = ieee80211_chan2ieee(ic, ni->ni_chan); 2978 } 2979 if (ic->ic_flags & IEEE80211_F_PCF) { 2980 bo->bo_cfp = frm; 2981 frm = ieee80211_add_cfparms(frm, ic); 2982 } 2983 bo->bo_tim = frm; 2984 if (vap->iv_opmode == IEEE80211_M_IBSS) { 2985 *frm++ = IEEE80211_ELEMID_IBSSPARMS; 2986 *frm++ = 2; 2987 *frm++ = 0; *frm++ = 0; /* TODO: ATIM window */ 2988 bo->bo_tim_len = 0; 2989 } else if (vap->iv_opmode == IEEE80211_M_HOSTAP || 2990 vap->iv_opmode == IEEE80211_M_MBSS) { 2991 /* TIM IE is the same for Mesh and Hostap */ 2992 struct ieee80211_tim_ie *tie = (struct ieee80211_tim_ie *) frm; 2993 2994 tie->tim_ie = IEEE80211_ELEMID_TIM; 2995 tie->tim_len = 4; /* length */ 2996 tie->tim_count = 0; /* DTIM count */ 2997 tie->tim_period = vap->iv_dtim_period; /* DTIM period */ 2998 tie->tim_bitctl = 0; /* bitmap control */ 2999 tie->tim_bitmap[0] = 0; /* Partial Virtual Bitmap */ 3000 frm += sizeof(struct ieee80211_tim_ie); 3001 bo->bo_tim_len = 1; 3002 } 3003 bo->bo_tim_trailer = frm; 3004 if ((vap->iv_flags & IEEE80211_F_DOTH) || 3005 (vap->iv_flags_ext & IEEE80211_FEXT_DOTD)) 3006 frm = ieee80211_add_countryie(frm, ic); 3007 if (vap->iv_flags & IEEE80211_F_DOTH) { 3008 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 3009 frm = ieee80211_add_powerconstraint(frm, vap); 3010 bo->bo_csa = frm; 3011 if (ic->ic_flags & IEEE80211_F_CSAPENDING) 3012 frm = ieee80211_add_csa(frm, vap); 3013 } else 3014 bo->bo_csa = frm; 3015 3016 if (vap->iv_flags & IEEE80211_F_DOTH) { 3017 bo->bo_quiet = frm; 3018 if (IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) && 3019 (vap->iv_flags_ext & IEEE80211_FEXT_DFS)) { 3020 if (vap->iv_quiet) 3021 frm = ieee80211_add_quiet(frm,vap); 3022 } 3023 } else 3024 bo->bo_quiet = frm; 3025 3026 if (IEEE80211_IS_CHAN_ANYG(ni->ni_chan)) { 3027 bo->bo_erp = frm; 3028 frm = ieee80211_add_erp(frm, ic); 3029 } 3030 frm = ieee80211_add_xrates(frm, rs); 3031 frm = ieee80211_add_rsn(frm, vap); 3032 if (IEEE80211_IS_CHAN_HT(ni->ni_chan)) { 3033 frm = ieee80211_add_htcap(frm, ni); 3034 bo->bo_htinfo = frm; 3035 frm = ieee80211_add_htinfo(frm, ni); 3036 } 3037 frm = ieee80211_add_wpa(frm, vap); 3038 if (vap->iv_flags & IEEE80211_F_WME) { 3039 bo->bo_wme = frm; 3040 frm = ieee80211_add_wme_param(frm, &ic->ic_wme); 3041 } 3042 if (IEEE80211_IS_CHAN_HT(ni->ni_chan) && 3043 (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT)) { 3044 frm = ieee80211_add_htcap_vendor(frm, ni); 3045 frm = ieee80211_add_htinfo_vendor(frm, ni); 3046 } 3047 #ifdef IEEE80211_SUPPORT_SUPERG 3048 if (vap->iv_flags & IEEE80211_F_ATHEROS) { 3049 bo->bo_ath = frm; 3050 frm = ieee80211_add_athcaps(frm, ni); 3051 } 3052 #endif 3053 #ifdef IEEE80211_SUPPORT_TDMA 3054 if (vap->iv_caps & IEEE80211_C_TDMA) { 3055 bo->bo_tdma = frm; 3056 frm = ieee80211_add_tdma(frm, vap); 3057 } 3058 #endif 3059 if (vap->iv_appie_beacon != NULL) { 3060 bo->bo_appie = frm; 3061 bo->bo_appie_len = vap->iv_appie_beacon->ie_len; 3062 frm = add_appie(frm, vap->iv_appie_beacon); 3063 } 3064 #ifdef IEEE80211_SUPPORT_MESH 3065 if (vap->iv_opmode == IEEE80211_M_MBSS) { 3066 frm = ieee80211_add_meshid(frm, vap); 3067 bo->bo_meshconf = frm; 3068 frm = ieee80211_add_meshconf(frm, vap); 3069 } 3070 #endif 3071 bo->bo_tim_trailer_len = frm - bo->bo_tim_trailer; 3072 bo->bo_csa_trailer_len = frm - bo->bo_csa; 3073 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 3074 } 3075 3076 /* 3077 * Allocate a beacon frame and fillin the appropriate bits. 3078 */ 3079 struct mbuf * 3080 ieee80211_beacon_alloc(struct ieee80211_node *ni, 3081 struct ieee80211_beacon_offsets *bo) 3082 { 3083 struct ieee80211vap *vap = ni->ni_vap; 3084 struct ieee80211com *ic = ni->ni_ic; 3085 struct ifnet *ifp = vap->iv_ifp; 3086 struct ieee80211_frame *wh; 3087 struct mbuf *m; 3088 int pktlen; 3089 uint8_t *frm; 3090 3091 /* 3092 * beacon frame format 3093 * [8] time stamp 3094 * [2] beacon interval 3095 * [2] cabability information 3096 * [tlv] ssid 3097 * [tlv] supported rates 3098 * [3] parameter set (DS) 3099 * [8] CF parameter set (optional) 3100 * [tlv] parameter set (IBSS/TIM) 3101 * [tlv] country (optional) 3102 * [3] power control (optional) 3103 * [5] channel switch announcement (CSA) (optional) 3104 * [tlv] extended rate phy (ERP) 3105 * [tlv] extended supported rates 3106 * [tlv] RSN parameters 3107 * [tlv] HT capabilities 3108 * [tlv] HT information 3109 * [tlv] Vendor OUI HT capabilities (optional) 3110 * [tlv] Vendor OUI HT information (optional) 3111 * XXX Vendor-specific OIDs (e.g. Atheros) 3112 * [tlv] WPA parameters 3113 * [tlv] WME parameters 3114 * [tlv] TDMA parameters (optional) 3115 * [tlv] Mesh ID (MBSS) 3116 * [tlv] Mesh Conf (MBSS) 3117 * [tlv] application data (optional) 3118 * NB: we allocate the max space required for the TIM bitmap. 3119 * XXX how big is this? 3120 */ 3121 pktlen = 8 /* time stamp */ 3122 + sizeof(uint16_t) /* beacon interval */ 3123 + sizeof(uint16_t) /* capabilities */ 3124 + 2 + ni->ni_esslen /* ssid */ 3125 + 2 + IEEE80211_RATE_SIZE /* supported rates */ 3126 + 2 + 1 /* DS parameters */ 3127 + 2 + 6 /* CF parameters */ 3128 + 2 + 4 + vap->iv_tim_len /* DTIM/IBSSPARMS */ 3129 + IEEE80211_COUNTRY_MAX_SIZE /* country */ 3130 + 2 + 1 /* power control */ 3131 + sizeof(struct ieee80211_csa_ie) /* CSA */ 3132 + sizeof(struct ieee80211_quiet_ie) /* Quiet */ 3133 + 2 + 1 /* ERP */ 3134 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 3135 + (vap->iv_caps & IEEE80211_C_WPA ? /* WPA 1+2 */ 3136 2*sizeof(struct ieee80211_ie_wpa) : 0) 3137 /* XXX conditional? */ 3138 + 4+2*sizeof(struct ieee80211_ie_htcap)/* HT caps */ 3139 + 4+2*sizeof(struct ieee80211_ie_htinfo)/* HT info */ 3140 + (vap->iv_caps & IEEE80211_C_WME ? /* WME */ 3141 sizeof(struct ieee80211_wme_param) : 0) 3142 #ifdef IEEE80211_SUPPORT_SUPERG 3143 + sizeof(struct ieee80211_ath_ie) /* ATH */ 3144 #endif 3145 #ifdef IEEE80211_SUPPORT_TDMA 3146 + (vap->iv_caps & IEEE80211_C_TDMA ? /* TDMA */ 3147 sizeof(struct ieee80211_tdma_param) : 0) 3148 #endif 3149 #ifdef IEEE80211_SUPPORT_MESH 3150 + 2 + ni->ni_meshidlen 3151 + sizeof(struct ieee80211_meshconf_ie) 3152 #endif 3153 + IEEE80211_MAX_APPIE 3154 ; 3155 m = ieee80211_getmgtframe(&frm, 3156 ic->ic_headroom + sizeof(struct ieee80211_frame), pktlen); 3157 if (m == NULL) { 3158 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY, 3159 "%s: cannot get buf; size %u\n", __func__, pktlen); 3160 vap->iv_stats.is_tx_nobuf++; 3161 return NULL; 3162 } 3163 ieee80211_beacon_construct(m, frm, bo, ni); 3164 3165 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); 3166 KASSERT(m != NULL, ("no space for 802.11 header?")); 3167 wh = mtod(m, struct ieee80211_frame *); 3168 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT | 3169 IEEE80211_FC0_SUBTYPE_BEACON; 3170 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 3171 *(uint16_t *)wh->i_dur = 0; 3172 IEEE80211_ADDR_COPY(wh->i_addr1, ifp->if_broadcastaddr); 3173 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); 3174 IEEE80211_ADDR_COPY(wh->i_addr3, ni->ni_bssid); 3175 *(uint16_t *)wh->i_seq = 0; 3176 3177 return m; 3178 } 3179 3180 /* 3181 * Update the dynamic parts of a beacon frame based on the current state. 3182 */ 3183 int 3184 ieee80211_beacon_update(struct ieee80211_node *ni, 3185 struct ieee80211_beacon_offsets *bo, struct mbuf *m, int mcast) 3186 { 3187 struct ieee80211vap *vap = ni->ni_vap; 3188 struct ieee80211com *ic = ni->ni_ic; 3189 int len_changed = 0; 3190 uint16_t capinfo; 3191 struct ieee80211_frame *wh; 3192 ieee80211_seq seqno; 3193 3194 IEEE80211_LOCK(ic); 3195 /* 3196 * Handle 11h channel change when we've reached the count. 3197 * We must recalculate the beacon frame contents to account 3198 * for the new channel. Note we do this only for the first 3199 * vap that reaches this point; subsequent vaps just update 3200 * their beacon state to reflect the recalculated channel. 3201 */ 3202 if (isset(bo->bo_flags, IEEE80211_BEACON_CSA) && 3203 vap->iv_csa_count == ic->ic_csa_count) { 3204 vap->iv_csa_count = 0; 3205 /* 3206 * Effect channel change before reconstructing the beacon 3207 * frame contents as many places reference ni_chan. 3208 */ 3209 if (ic->ic_csa_newchan != NULL) 3210 ieee80211_csa_completeswitch(ic); 3211 /* 3212 * NB: ieee80211_beacon_construct clears all pending 3213 * updates in bo_flags so we don't need to explicitly 3214 * clear IEEE80211_BEACON_CSA. 3215 */ 3216 ieee80211_beacon_construct(m, 3217 mtod(m, uint8_t*) + sizeof(struct ieee80211_frame), bo, ni); 3218 3219 /* XXX do WME aggressive mode processing? */ 3220 IEEE80211_UNLOCK(ic); 3221 return 1; /* just assume length changed */ 3222 } 3223 3224 wh = mtod(m, struct ieee80211_frame *); 3225 seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]++; 3226 *(uint16_t *)&wh->i_seq[0] = 3227 htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); 3228 M_SEQNO_SET(m, seqno); 3229 3230 /* XXX faster to recalculate entirely or just changes? */ 3231 capinfo = ieee80211_getcapinfo(vap, ni->ni_chan); 3232 *bo->bo_caps = htole16(capinfo); 3233 3234 if (vap->iv_flags & IEEE80211_F_WME) { 3235 struct ieee80211_wme_state *wme = &ic->ic_wme; 3236 3237 /* 3238 * Check for agressive mode change. When there is 3239 * significant high priority traffic in the BSS 3240 * throttle back BE traffic by using conservative 3241 * parameters. Otherwise BE uses agressive params 3242 * to optimize performance of legacy/non-QoS traffic. 3243 */ 3244 if (wme->wme_flags & WME_F_AGGRMODE) { 3245 if (wme->wme_hipri_traffic > 3246 wme->wme_hipri_switch_thresh) { 3247 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 3248 "%s: traffic %u, disable aggressive mode\n", 3249 __func__, wme->wme_hipri_traffic); 3250 wme->wme_flags &= ~WME_F_AGGRMODE; 3251 ieee80211_wme_updateparams_locked(vap); 3252 wme->wme_hipri_traffic = 3253 wme->wme_hipri_switch_hysteresis; 3254 } else 3255 wme->wme_hipri_traffic = 0; 3256 } else { 3257 if (wme->wme_hipri_traffic <= 3258 wme->wme_hipri_switch_thresh) { 3259 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 3260 "%s: traffic %u, enable aggressive mode\n", 3261 __func__, wme->wme_hipri_traffic); 3262 wme->wme_flags |= WME_F_AGGRMODE; 3263 ieee80211_wme_updateparams_locked(vap); 3264 wme->wme_hipri_traffic = 0; 3265 } else 3266 wme->wme_hipri_traffic = 3267 wme->wme_hipri_switch_hysteresis; 3268 } 3269 if (isset(bo->bo_flags, IEEE80211_BEACON_WME)) { 3270 (void) ieee80211_add_wme_param(bo->bo_wme, wme); 3271 clrbit(bo->bo_flags, IEEE80211_BEACON_WME); 3272 } 3273 } 3274 3275 if (isset(bo->bo_flags, IEEE80211_BEACON_HTINFO)) { 3276 ieee80211_ht_update_beacon(vap, bo); 3277 clrbit(bo->bo_flags, IEEE80211_BEACON_HTINFO); 3278 } 3279 #ifdef IEEE80211_SUPPORT_TDMA 3280 if (vap->iv_caps & IEEE80211_C_TDMA) { 3281 /* 3282 * NB: the beacon is potentially updated every TBTT. 3283 */ 3284 ieee80211_tdma_update_beacon(vap, bo); 3285 } 3286 #endif 3287 #ifdef IEEE80211_SUPPORT_MESH 3288 if (vap->iv_opmode == IEEE80211_M_MBSS) 3289 ieee80211_mesh_update_beacon(vap, bo); 3290 #endif 3291 3292 if (vap->iv_opmode == IEEE80211_M_HOSTAP || 3293 vap->iv_opmode == IEEE80211_M_MBSS) { /* NB: no IBSS support*/ 3294 struct ieee80211_tim_ie *tie = 3295 (struct ieee80211_tim_ie *) bo->bo_tim; 3296 if (isset(bo->bo_flags, IEEE80211_BEACON_TIM)) { 3297 u_int timlen, timoff, i; 3298 /* 3299 * ATIM/DTIM needs updating. If it fits in the 3300 * current space allocated then just copy in the 3301 * new bits. Otherwise we need to move any trailing 3302 * data to make room. Note that we know there is 3303 * contiguous space because ieee80211_beacon_allocate 3304 * insures there is space in the mbuf to write a 3305 * maximal-size virtual bitmap (based on iv_max_aid). 3306 */ 3307 /* 3308 * Calculate the bitmap size and offset, copy any 3309 * trailer out of the way, and then copy in the 3310 * new bitmap and update the information element. 3311 * Note that the tim bitmap must contain at least 3312 * one byte and any offset must be even. 3313 */ 3314 if (vap->iv_ps_pending != 0) { 3315 timoff = 128; /* impossibly large */ 3316 for (i = 0; i < vap->iv_tim_len; i++) 3317 if (vap->iv_tim_bitmap[i]) { 3318 timoff = i &~ 1; 3319 break; 3320 } 3321 KASSERT(timoff != 128, ("tim bitmap empty!")); 3322 for (i = vap->iv_tim_len-1; i >= timoff; i--) 3323 if (vap->iv_tim_bitmap[i]) 3324 break; 3325 timlen = 1 + (i - timoff); 3326 } else { 3327 timoff = 0; 3328 timlen = 1; 3329 } 3330 if (timlen != bo->bo_tim_len) { 3331 /* copy up/down trailer */ 3332 int adjust = tie->tim_bitmap+timlen 3333 - bo->bo_tim_trailer; 3334 ovbcopy(bo->bo_tim_trailer, 3335 bo->bo_tim_trailer+adjust, 3336 bo->bo_tim_trailer_len); 3337 bo->bo_tim_trailer += adjust; 3338 bo->bo_erp += adjust; 3339 bo->bo_htinfo += adjust; 3340 #ifdef IEEE80211_SUPPORT_SUPERG 3341 bo->bo_ath += adjust; 3342 #endif 3343 #ifdef IEEE80211_SUPPORT_TDMA 3344 bo->bo_tdma += adjust; 3345 #endif 3346 #ifdef IEEE80211_SUPPORT_MESH 3347 bo->bo_meshconf += adjust; 3348 #endif 3349 bo->bo_appie += adjust; 3350 bo->bo_wme += adjust; 3351 bo->bo_csa += adjust; 3352 bo->bo_quiet += adjust; 3353 bo->bo_tim_len = timlen; 3354 3355 /* update information element */ 3356 tie->tim_len = 3 + timlen; 3357 tie->tim_bitctl = timoff; 3358 len_changed = 1; 3359 } 3360 memcpy(tie->tim_bitmap, vap->iv_tim_bitmap + timoff, 3361 bo->bo_tim_len); 3362 3363 clrbit(bo->bo_flags, IEEE80211_BEACON_TIM); 3364 3365 IEEE80211_DPRINTF(vap, IEEE80211_MSG_POWER, 3366 "%s: TIM updated, pending %u, off %u, len %u\n", 3367 __func__, vap->iv_ps_pending, timoff, timlen); 3368 } 3369 /* count down DTIM period */ 3370 if (tie->tim_count == 0) 3371 tie->tim_count = tie->tim_period - 1; 3372 else 3373 tie->tim_count--; 3374 /* update state for buffered multicast frames on DTIM */ 3375 if (mcast && tie->tim_count == 0) 3376 tie->tim_bitctl |= 1; 3377 else 3378 tie->tim_bitctl &= ~1; 3379 if (isset(bo->bo_flags, IEEE80211_BEACON_CSA)) { 3380 struct ieee80211_csa_ie *csa = 3381 (struct ieee80211_csa_ie *) bo->bo_csa; 3382 3383 /* 3384 * Insert or update CSA ie. If we're just starting 3385 * to count down to the channel switch then we need 3386 * to insert the CSA ie. Otherwise we just need to 3387 * drop the count. The actual change happens above 3388 * when the vap's count reaches the target count. 3389 */ 3390 if (vap->iv_csa_count == 0) { 3391 memmove(&csa[1], csa, bo->bo_csa_trailer_len); 3392 bo->bo_erp += sizeof(*csa); 3393 bo->bo_htinfo += sizeof(*csa); 3394 bo->bo_wme += sizeof(*csa); 3395 #ifdef IEEE80211_SUPPORT_SUPERG 3396 bo->bo_ath += sizeof(*csa); 3397 #endif 3398 #ifdef IEEE80211_SUPPORT_TDMA 3399 bo->bo_tdma += sizeof(*csa); 3400 #endif 3401 #ifdef IEEE80211_SUPPORT_MESH 3402 bo->bo_meshconf += sizeof(*csa); 3403 #endif 3404 bo->bo_appie += sizeof(*csa); 3405 bo->bo_csa_trailer_len += sizeof(*csa); 3406 bo->bo_quiet += sizeof(*csa); 3407 bo->bo_tim_trailer_len += sizeof(*csa); 3408 m->m_len += sizeof(*csa); 3409 m->m_pkthdr.len += sizeof(*csa); 3410 3411 ieee80211_add_csa(bo->bo_csa, vap); 3412 } else 3413 csa->csa_count--; 3414 vap->iv_csa_count++; 3415 /* NB: don't clear IEEE80211_BEACON_CSA */ 3416 } 3417 if (IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) && 3418 (vap->iv_flags_ext & IEEE80211_FEXT_DFS) ){ 3419 if (vap->iv_quiet) 3420 ieee80211_add_quiet(bo->bo_quiet, vap); 3421 } 3422 if (isset(bo->bo_flags, IEEE80211_BEACON_ERP)) { 3423 /* 3424 * ERP element needs updating. 3425 */ 3426 (void) ieee80211_add_erp(bo->bo_erp, ic); 3427 clrbit(bo->bo_flags, IEEE80211_BEACON_ERP); 3428 } 3429 #ifdef IEEE80211_SUPPORT_SUPERG 3430 if (isset(bo->bo_flags, IEEE80211_BEACON_ATH)) { 3431 ieee80211_add_athcaps(bo->bo_ath, ni); 3432 clrbit(bo->bo_flags, IEEE80211_BEACON_ATH); 3433 } 3434 #endif 3435 } 3436 if (isset(bo->bo_flags, IEEE80211_BEACON_APPIE)) { 3437 const struct ieee80211_appie *aie = vap->iv_appie_beacon; 3438 int aielen; 3439 uint8_t *frm; 3440 3441 aielen = 0; 3442 if (aie != NULL) 3443 aielen += aie->ie_len; 3444 if (aielen != bo->bo_appie_len) { 3445 /* copy up/down trailer */ 3446 int adjust = aielen - bo->bo_appie_len; 3447 ovbcopy(bo->bo_tim_trailer, bo->bo_tim_trailer+adjust, 3448 bo->bo_tim_trailer_len); 3449 bo->bo_tim_trailer += adjust; 3450 bo->bo_appie += adjust; 3451 bo->bo_appie_len = aielen; 3452 3453 len_changed = 1; 3454 } 3455 frm = bo->bo_appie; 3456 if (aie != NULL) 3457 frm = add_appie(frm, aie); 3458 clrbit(bo->bo_flags, IEEE80211_BEACON_APPIE); 3459 } 3460 IEEE80211_UNLOCK(ic); 3461 3462 return len_changed; 3463 } 3464 3465 /* 3466 * Do Ethernet-LLC encapsulation for each payload in a fast frame 3467 * tunnel encapsulation. The frame is assumed to have an Ethernet 3468 * header at the front that must be stripped before prepending the 3469 * LLC followed by the Ethernet header passed in (with an Ethernet 3470 * type that specifies the payload size). 3471 */ 3472 struct mbuf * 3473 ieee80211_ff_encap1(struct ieee80211vap *vap, struct mbuf *m, 3474 const struct ether_header *eh) 3475 { 3476 struct llc *llc; 3477 uint16_t payload; 3478 3479 /* XXX optimize by combining m_adj+M_PREPEND */ 3480 m_adj(m, sizeof(struct ether_header) - sizeof(struct llc)); 3481 llc = mtod(m, struct llc *); 3482 llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP; 3483 llc->llc_control = LLC_UI; 3484 llc->llc_snap.org_code[0] = 0; 3485 llc->llc_snap.org_code[1] = 0; 3486 llc->llc_snap.org_code[2] = 0; 3487 llc->llc_snap.ether_type = eh->ether_type; 3488 payload = m->m_pkthdr.len; /* NB: w/o Ethernet header */ 3489 3490 M_PREPEND(m, sizeof(struct ether_header), M_NOWAIT); 3491 if (m == NULL) { /* XXX cannot happen */ 3492 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG, 3493 "%s: no space for ether_header\n", __func__); 3494 vap->iv_stats.is_tx_nobuf++; 3495 return NULL; 3496 } 3497 ETHER_HEADER_COPY(mtod(m, void *), eh); 3498 mtod(m, struct ether_header *)->ether_type = htons(payload); 3499 return m; 3500 } 3501 3502 /* 3503 * Complete an mbuf transmission. 3504 * 3505 * For now, this simply processes a completed frame after the 3506 * driver has completed it's transmission and/or retransmission. 3507 * It assumes the frame is an 802.11 encapsulated frame. 3508 * 3509 * Later on it will grow to become the exit path for a given frame 3510 * from the driver and, depending upon how it's been encapsulated 3511 * and already transmitted, it may end up doing A-MPDU retransmission, 3512 * power save requeuing, etc. 3513 * 3514 * In order for the above to work, the driver entry point to this 3515 * must not hold any driver locks. Thus, the driver needs to delay 3516 * any actual mbuf completion until it can release said locks. 3517 * 3518 * This frees the mbuf and if the mbuf has a node reference, 3519 * the node reference will be freed. 3520 */ 3521 void 3522 ieee80211_tx_complete(struct ieee80211_node *ni, struct mbuf *m, int status) 3523 { 3524 3525 if (ni != NULL) { 3526 if (m->m_flags & M_TXCB) 3527 ieee80211_process_callback(ni, m, status); 3528 ieee80211_free_node(ni); 3529 } 3530 m_freem(m); 3531 } 3532