1 /*- 2 * Copyright (c) 2003-2009 Sam Leffler, Errno Consulting 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 * 25 * $FreeBSD: head/sys/net80211/ieee80211_freebsd.c 202612 2010-01-19 05:00:57Z thompsa $ 26 */ 27 28 /* 29 * IEEE 802.11 support (DragonFlyBSD-specific code) 30 */ 31 #include "opt_wlan.h" 32 33 #include <sys/param.h> 34 #include <sys/kernel.h> 35 #include <sys/systm.h> 36 #include <sys/linker.h> 37 #include <sys/mbuf.h> 38 #include <sys/module.h> 39 #include <sys/proc.h> 40 #include <sys/sysctl.h> 41 42 #include <sys/socket.h> 43 44 #include <net/bpf.h> 45 #include <net/if.h> 46 #include <net/if_dl.h> 47 #include <net/if_clone.h> 48 #include <net/if_media.h> 49 #include <net/if_types.h> 50 #include <net/ethernet.h> 51 #include <net/route.h> 52 #include <net/ifq_var.h> 53 54 #include <netproto/802_11/ieee80211_var.h> 55 #include <netproto/802_11/ieee80211_input.h> 56 57 SYSCTL_NODE(_net, OID_AUTO, wlan, CTLFLAG_RD, 0, "IEEE 80211 parameters"); 58 59 #ifdef IEEE80211_DEBUG 60 int ieee80211_debug = 0; 61 SYSCTL_INT(_net_wlan, OID_AUTO, debug, CTLFLAG_RW, &ieee80211_debug, 62 0, "debugging printfs"); 63 #endif 64 65 int ieee80211_force_swcrypto = 0; 66 SYSCTL_INT(_net_wlan, OID_AUTO, force_swcrypto, CTLFLAG_RW, 67 &ieee80211_force_swcrypto, 0, "force software crypto"); 68 69 MALLOC_DEFINE(M_80211_COM, "80211com", "802.11 com state"); 70 71 72 static int wlan_clone_destroy(struct ifnet *); 73 static int wlan_clone_create(struct if_clone *, int, caddr_t); 74 75 static struct if_clone wlan_cloner = 76 IF_CLONE_INITIALIZER("wlan", wlan_clone_create, wlan_clone_destroy, 77 0, IF_MAXUNIT); 78 79 struct lwkt_serialize wlan_global_serializer = LWKT_SERIALIZE_INITIALIZER; 80 81 /* 82 * Allocate/free com structure in conjunction with ifnet; 83 * these routines are registered with if_register_com_alloc 84 * below and are called automatically by the ifnet code 85 * when the ifnet of the parent device is created. 86 */ 87 static void * 88 wlan_alloc(u_char type, struct ifnet *ifp) 89 { 90 struct ieee80211com *ic; 91 92 ic = kmalloc(sizeof(struct ieee80211com), M_80211_COM, M_WAITOK|M_ZERO); 93 ic->ic_ifp = ifp; 94 95 return (ic); 96 } 97 98 static void 99 wlan_free(void *ic, u_char type) 100 { 101 kfree(ic, M_80211_COM); 102 } 103 104 static int 105 wlan_clone_create(struct if_clone *ifc, int unit, caddr_t params) 106 { 107 struct ieee80211_clone_params cp; 108 struct ieee80211vap *vap; 109 struct ieee80211com *ic; 110 struct ifnet *ifp; 111 int error; 112 113 error = copyin(params, &cp, sizeof(cp)); 114 if (error) 115 return error; 116 117 ifnet_lock(); 118 119 ifp = ifunit(cp.icp_parent); 120 if (ifp == NULL) { 121 ifnet_unlock(); 122 return ENXIO; 123 } 124 /* XXX move printfs to DIAGNOSTIC before release */ 125 if (ifp->if_type != IFT_IEEE80211) { 126 if_printf(ifp, "%s: reject, not an 802.11 device\n", __func__); 127 ifnet_unlock(); 128 return ENXIO; 129 } 130 if (cp.icp_opmode >= IEEE80211_OPMODE_MAX) { 131 if_printf(ifp, "%s: invalid opmode %d\n", 132 __func__, cp.icp_opmode); 133 ifnet_unlock(); 134 return EINVAL; 135 } 136 ic = ifp->if_l2com; 137 if ((ic->ic_caps & ieee80211_opcap[cp.icp_opmode]) == 0) { 138 if_printf(ifp, "%s mode not supported\n", 139 ieee80211_opmode_name[cp.icp_opmode]); 140 ifnet_unlock(); 141 return EOPNOTSUPP; 142 } 143 if ((cp.icp_flags & IEEE80211_CLONE_TDMA) && 144 #ifdef IEEE80211_SUPPORT_TDMA 145 (ic->ic_caps & IEEE80211_C_TDMA) == 0 146 #else 147 (1) 148 #endif 149 ) { 150 if_printf(ifp, "TDMA not supported\n"); 151 ifnet_unlock(); 152 return EOPNOTSUPP; 153 } 154 vap = ic->ic_vap_create(ic, ifc->ifc_name, unit, 155 cp.icp_opmode, cp.icp_flags, cp.icp_bssid, 156 cp.icp_flags & IEEE80211_CLONE_MACADDR ? 157 cp.icp_macaddr : (const uint8_t *)IF_LLADDR(ifp)); 158 159 ifnet_unlock(); 160 161 return (vap == NULL ? EIO : 0); 162 } 163 164 static int 165 wlan_clone_destroy(struct ifnet *ifp) 166 { 167 struct ieee80211vap *vap = ifp->if_softc; 168 struct ieee80211com *ic = vap->iv_ic; 169 170 ic->ic_vap_delete(vap); 171 172 return 0; 173 } 174 175 const char *wlan_last_enter_func; 176 const char *wlan_last_exit_func; 177 178 /* 179 * These serializer functions are used by wlan and all drivers. 180 * They are not recursive. The serializer must be held on 181 * any OACTIVE interactions. Dragonfly automatically holds 182 * the serializer on most ifp->if_*() calls but calls made 183 * from wlan into ath might not. 184 */ 185 void 186 _wlan_serialize_enter(const char *funcname) 187 { 188 lwkt_serialize_enter(&wlan_global_serializer); 189 wlan_last_enter_func = funcname; 190 } 191 192 void 193 _wlan_serialize_exit(const char *funcname) 194 { 195 lwkt_serialize_exit(&wlan_global_serializer); 196 wlan_last_exit_func = funcname; 197 } 198 199 int 200 _wlan_is_serialized(void) 201 { 202 return (IS_SERIALIZED(&wlan_global_serializer)); 203 } 204 205 /* 206 * Push/pop allows the wlan serializer to be entered recursively. 207 */ 208 int 209 _wlan_serialize_push(const char *funcname) 210 { 211 if (IS_SERIALIZED(&wlan_global_serializer)) { 212 return 0; 213 } else { 214 _wlan_serialize_enter(funcname); 215 return 1; 216 } 217 } 218 219 void 220 _wlan_serialize_pop(const char *funcname, int wst) 221 { 222 if (wst) { 223 _wlan_serialize_exit(funcname); 224 } 225 } 226 227 #if 0 228 229 int 230 wlan_serialize_sleep(void *ident, int flags, const char *wmesg, int timo) 231 { 232 return(zsleep(ident, &wlan_global_serializer, flags, wmesg, timo)); 233 } 234 235 /* 236 * condition-var functions which interlock the ic lock (which is now 237 * just wlan_global_serializer) 238 */ 239 void 240 wlan_cv_init(struct cv *cv, const char *desc) 241 { 242 cv->cv_desc = desc; 243 cv->cv_waiters = 0; 244 } 245 246 int 247 wlan_cv_timedwait(struct cv *cv, int ticks) 248 { 249 int error; 250 251 ++cv->cv_waiters; 252 error = wlan_serialize_sleep(cv, 0, cv->cv_desc, ticks); 253 return (error); 254 } 255 256 void 257 wlan_cv_wait(struct cv *cv) 258 { 259 ++cv->cv_waiters; 260 wlan_serialize_sleep(cv, 0, cv->cv_desc, 0); 261 } 262 263 void 264 wlan_cv_signal(struct cv *cv, int broadcast) 265 { 266 if (cv->cv_waiters) { 267 if (broadcast) { 268 cv->cv_waiters = 0; 269 wakeup(cv); 270 } else { 271 --cv->cv_waiters; 272 wakeup_one(cv); 273 } 274 } 275 } 276 277 #endif 278 279 /* 280 * Misc 281 */ 282 int 283 ieee80211_vap_xmitpkt(struct ieee80211vap *vap, struct mbuf *m) 284 { 285 struct ifnet *ifp = vap->iv_ifp; 286 struct ifaltq_subque *ifsq = ifq_get_subq_default(&ifp->if_snd); 287 int error; 288 int wst; 289 290 /* 291 * When transmitting via the VAP, we shouldn't hold 292 * any IC TX lock as the VAP TX path will acquire it. 293 */ 294 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 295 296 error = ifsq_enqueue(ifsq, m, NULL); 297 wst = wlan_serialize_push(); 298 ifp->if_start(ifp, ifsq); 299 wlan_serialize_pop(wst); 300 301 return error; 302 } 303 304 int 305 ieee80211_parent_xmitpkt(struct ieee80211com *ic, struct mbuf *m) 306 { 307 struct ifnet *parent = ic->ic_ifp; 308 struct ifaltq_subque *ifsq = ifq_get_subq_default(&parent->if_snd); 309 int error; 310 int wst; 311 312 /* 313 * Assert the IC TX lock is held - this enforces the 314 * processing -> queuing order is maintained 315 */ 316 IEEE80211_TX_LOCK_ASSERT(ic); 317 318 error = ifsq_enqueue(ifsq, m, NULL); 319 wst = wlan_serialize_push(); 320 parent->if_start(parent, ifsq); 321 wlan_serialize_pop(wst); 322 323 return error; 324 } 325 326 void 327 ieee80211_vap_destroy(struct ieee80211vap *vap) 328 { 329 /* 330 * WLAN serializer must _not_ be held for if_clone_destroy(), 331 * since it could dead-lock the domsg to netisrs. 332 */ 333 wlan_serialize_exit(); 334 if_clone_destroy(vap->iv_ifp->if_xname); 335 wlan_serialize_enter(); 336 } 337 338 /* 339 * NOTE: This handler is used generally to convert milliseconds 340 * to ticks for various simple sysctl variables and does not 341 * need to be serialized. 342 */ 343 int 344 ieee80211_sysctl_msecs_ticks(SYSCTL_HANDLER_ARGS) 345 { 346 int msecs = ticks_to_msecs(*(int *)arg1); 347 int error, t; 348 349 error = sysctl_handle_int(oidp, &msecs, 0, req); 350 if (error == 0 && req->newptr) { 351 t = msecs_to_ticks(msecs); 352 *(int *)arg1 = (t < 1) ? 1 : t; 353 } 354 355 return error; 356 } 357 358 static int 359 ieee80211_sysctl_inact(SYSCTL_HANDLER_ARGS) 360 { 361 int inact = (*(int *)arg1) * IEEE80211_INACT_WAIT; 362 int error; 363 364 error = sysctl_handle_int(oidp, &inact, 0, req); 365 if (error == 0 && req->newptr) 366 *(int *)arg1 = inact / IEEE80211_INACT_WAIT; 367 368 return error; 369 } 370 371 static int 372 ieee80211_sysctl_parent(SYSCTL_HANDLER_ARGS) 373 { 374 struct ieee80211com *ic = arg1; 375 const char *name = ic->ic_ifp->if_xname; 376 377 return SYSCTL_OUT(req, name, strlen(name)); 378 } 379 380 static int 381 ieee80211_sysctl_radar(SYSCTL_HANDLER_ARGS) 382 { 383 struct ieee80211com *ic = arg1; 384 int t = 0, error; 385 386 error = sysctl_handle_int(oidp, &t, 0, req); 387 if (error == 0 && req->newptr) 388 ieee80211_dfs_notify_radar(ic, ic->ic_curchan); 389 390 return error; 391 } 392 393 void 394 ieee80211_sysctl_attach(struct ieee80211com *ic) 395 { 396 } 397 398 void 399 ieee80211_sysctl_detach(struct ieee80211com *ic) 400 { 401 } 402 403 void 404 ieee80211_sysctl_vattach(struct ieee80211vap *vap) 405 { 406 struct ifnet *ifp = vap->iv_ifp; 407 struct sysctl_ctx_list *ctx; 408 struct sysctl_oid *oid; 409 char num[14]; /* sufficient for 32 bits */ 410 411 ctx = (struct sysctl_ctx_list *) kmalloc(sizeof(struct sysctl_ctx_list), 412 M_DEVBUF, M_INTWAIT | M_ZERO); 413 if (ctx == NULL) { 414 if_printf(ifp, "%s: cannot allocate sysctl context!\n", 415 __func__); 416 return; 417 } 418 sysctl_ctx_init(ctx); 419 ksnprintf(num, sizeof(num), "%u", ifp->if_dunit); 420 oid = SYSCTL_ADD_NODE(ctx, &SYSCTL_NODE_CHILDREN(_net, wlan), 421 OID_AUTO, num, CTLFLAG_RD, NULL, ""); 422 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 423 "%parent", CTLFLAG_RD, vap->iv_ic, 0, 424 ieee80211_sysctl_parent, "A", "parent device"); 425 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 426 "driver_caps", CTLFLAG_RW, &vap->iv_caps, 0, 427 "driver capabilities"); 428 #ifdef IEEE80211_DEBUG 429 vap->iv_debug = ieee80211_debug; 430 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 431 "debug", CTLFLAG_RW, &vap->iv_debug, 0, 432 "control debugging printfs"); 433 #endif 434 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 435 "bmiss_max", CTLFLAG_RW, &vap->iv_bmiss_max, 0, 436 "consecutive beacon misses before scanning"); 437 /* XXX inherit from tunables */ 438 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 439 "inact_run", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_run, 0, 440 ieee80211_sysctl_inact, "I", 441 "station inactivity timeout (sec)"); 442 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 443 "inact_probe", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_probe, 0, 444 ieee80211_sysctl_inact, "I", 445 "station inactivity probe timeout (sec)"); 446 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 447 "inact_auth", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_auth, 0, 448 ieee80211_sysctl_inact, "I", 449 "station authentication timeout (sec)"); 450 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 451 "inact_init", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_init, 0, 452 ieee80211_sysctl_inact, "I", 453 "station initial state timeout (sec)"); 454 if (vap->iv_htcaps & IEEE80211_HTC_HT) { 455 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 456 "ampdu_mintraffic_bk", CTLFLAG_RW, 457 &vap->iv_ampdu_mintraffic[WME_AC_BK], 0, 458 "BK traffic tx aggr threshold (pps)"); 459 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 460 "ampdu_mintraffic_be", CTLFLAG_RW, 461 &vap->iv_ampdu_mintraffic[WME_AC_BE], 0, 462 "BE traffic tx aggr threshold (pps)"); 463 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 464 "ampdu_mintraffic_vo", CTLFLAG_RW, 465 &vap->iv_ampdu_mintraffic[WME_AC_VO], 0, 466 "VO traffic tx aggr threshold (pps)"); 467 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 468 "ampdu_mintraffic_vi", CTLFLAG_RW, 469 &vap->iv_ampdu_mintraffic[WME_AC_VI], 0, 470 "VI traffic tx aggr threshold (pps)"); 471 } 472 if (vap->iv_caps & IEEE80211_C_DFS) { 473 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 474 "radar", CTLTYPE_INT | CTLFLAG_RW, vap->iv_ic, 0, 475 ieee80211_sysctl_radar, "I", "simulate radar event"); 476 } 477 vap->iv_sysctl = ctx; 478 vap->iv_oid = oid; 479 } 480 481 void 482 ieee80211_sysctl_vdetach(struct ieee80211vap *vap) 483 { 484 485 if (vap->iv_sysctl != NULL) { 486 sysctl_ctx_free(vap->iv_sysctl); 487 kfree(vap->iv_sysctl, M_DEVBUF); 488 vap->iv_sysctl = NULL; 489 } 490 } 491 492 int 493 ieee80211_node_dectestref(struct ieee80211_node *ni) 494 { 495 /* XXX need equivalent of atomic_dec_and_test */ 496 atomic_subtract_int(&ni->ni_refcnt, 1); 497 return atomic_cmpset_int(&ni->ni_refcnt, 0, 1); 498 } 499 500 #if 0 501 /* XXX this breaks ALTQ's packet scheduler */ 502 void 503 ieee80211_flush_ifq(struct ifaltq *ifq, struct ieee80211vap *vap) 504 { 505 struct ieee80211_node *ni; 506 struct mbuf *m, **mprev; 507 struct ifaltq_subque *ifsq = ifq_get_subq_default(ifq); 508 509 wlan_assert_serialized(); 510 511 ALTQ_SQ_LOCK(ifsq); 512 513 /* 514 * Fix normal queue 515 */ 516 mprev = &ifsq->ifsq_norm_head; 517 while ((m = *mprev) != NULL) { 518 ni = (struct ieee80211_node *)m->m_pkthdr.rcvif; 519 if (ni != NULL && ni->ni_vap == vap) { 520 *mprev = m->m_nextpkt; /* remove from list */ 521 ALTQ_SQ_CNTR_DEC(ifsq, m->m_pkthdr.len); 522 523 m_freem(m); 524 ieee80211_free_node(ni); /* reclaim ref */ 525 } else 526 mprev = &m->m_nextpkt; 527 } 528 /* recalculate tail ptr */ 529 m = ifsq->ifsq_norm_head; 530 for (; m != NULL && m->m_nextpkt != NULL; m = m->m_nextpkt) 531 ; 532 ifsq->ifsq_norm_tail = m; 533 534 /* 535 * Fix priority queue 536 */ 537 mprev = &ifsq->ifsq_prio_head; 538 while ((m = *mprev) != NULL) { 539 ni = (struct ieee80211_node *)m->m_pkthdr.rcvif; 540 if (ni != NULL && ni->ni_vap == vap) { 541 *mprev = m->m_nextpkt; /* remove from list */ 542 ALTQ_SQ_CNTR_DEC(ifsq, m->m_pkthdr.len); 543 ALTQ_SQ_PRIO_CNTR_DEC(ifsq, m->m_pkthdr.len); 544 545 m_freem(m); 546 ieee80211_free_node(ni); /* reclaim ref */ 547 } else 548 mprev = &m->m_nextpkt; 549 } 550 /* recalculate tail ptr */ 551 m = ifsq->ifsq_prio_head; 552 for (; m != NULL && m->m_nextpkt != NULL; m = m->m_nextpkt) 553 ; 554 ifsq->ifsq_prio_tail = m; 555 556 ALTQ_SQ_UNLOCK(ifsq); 557 } 558 #endif 559 560 /* 561 * As above, for mbufs allocated with m_gethdr/MGETHDR 562 * or initialized by M_COPY_PKTHDR. 563 */ 564 #define MC_ALIGN(m, len) \ 565 do { \ 566 (m)->m_data += (MCLBYTES - (len)) &~ (sizeof(long) - 1); \ 567 } while (/* CONSTCOND */ 0) 568 569 /* 570 * Allocate and setup a management frame of the specified 571 * size. We return the mbuf and a pointer to the start 572 * of the contiguous data area that's been reserved based 573 * on the packet length. The data area is forced to 32-bit 574 * alignment and the buffer length to a multiple of 4 bytes. 575 * This is done mainly so beacon frames (that require this) 576 * can use this interface too. 577 */ 578 struct mbuf * 579 ieee80211_getmgtframe(uint8_t **frm, int headroom, int pktlen) 580 { 581 struct mbuf *m; 582 u_int len; 583 584 /* 585 * NB: we know the mbuf routines will align the data area 586 * so we don't need to do anything special. 587 */ 588 len = roundup2(headroom + pktlen, 4); 589 KASSERT(len <= MCLBYTES, ("802.11 mgt frame too large: %u", len)); 590 if (len < MINCLSIZE) { 591 m = m_gethdr(M_NOWAIT, MT_DATA); 592 /* 593 * Align the data in case additional headers are added. 594 * This should only happen when a WEP header is added 595 * which only happens for shared key authentication mgt 596 * frames which all fit in MHLEN. 597 */ 598 if (m != NULL) 599 MH_ALIGN(m, len); 600 } else { 601 m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR); 602 if (m != NULL) 603 MC_ALIGN(m, len); 604 } 605 if (m != NULL) { 606 m->m_data += headroom; 607 *frm = m->m_data; 608 } 609 return m; 610 } 611 612 /* 613 * Re-align the payload in the mbuf. This is mainly used (right now) 614 * to handle IP header alignment requirements on certain architectures. 615 */ 616 struct mbuf * 617 ieee80211_realign(struct ieee80211vap *vap, struct mbuf *m, size_t align) 618 { 619 int pktlen, space; 620 struct mbuf *n = NULL; 621 622 pktlen = m->m_pkthdr.len; 623 space = pktlen + align; 624 if (space < MINCLSIZE) { 625 n = m_gethdr(M_NOWAIT, MT_DATA); 626 } else { 627 if (space <= MCLBYTES) 628 space = MCLBYTES; 629 else if (space <= MJUMPAGESIZE) 630 space = MJUMPAGESIZE; 631 else if (space <= MJUM9BYTES) 632 space = MJUM9BYTES; 633 else 634 space = MJUM16BYTES; 635 n = m_getjcl(M_NOWAIT, MT_DATA, M_PKTHDR, space); 636 } 637 if (__predict_true(n != NULL)) { 638 m_move_pkthdr(n, m); 639 n->m_data = (caddr_t)(ALIGN(n->m_data + align) - align); 640 m_copydata(m, 0, pktlen, mtod(n, caddr_t)); 641 n->m_len = pktlen; 642 } else { 643 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 644 mtod(m, const struct ieee80211_frame *), NULL, 645 "%s", "no mbuf to realign"); 646 vap->iv_stats.is_rx_badalign++; 647 } 648 m_freem(m); 649 return n; 650 } 651 652 int 653 ieee80211_add_callback(struct mbuf *m, 654 void (*func)(struct ieee80211_node *, void *, int), void *arg) 655 { 656 struct m_tag *mtag; 657 struct ieee80211_cb *cb; 658 659 mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_CALLBACK, 660 sizeof(struct ieee80211_cb), M_INTWAIT); 661 if (mtag == NULL) 662 return 0; 663 664 cb = (struct ieee80211_cb *)(mtag+1); 665 cb->func = func; 666 cb->arg = arg; 667 m_tag_prepend(m, mtag); 668 m->m_flags |= M_TXCB; 669 return 1; 670 } 671 672 void 673 ieee80211_process_callback(struct ieee80211_node *ni, 674 struct mbuf *m, int status) 675 { 676 struct m_tag *mtag; 677 678 mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_CALLBACK, NULL); 679 if (mtag != NULL) { 680 struct ieee80211_cb *cb = (struct ieee80211_cb *)(mtag+1); 681 cb->func(ni, cb->arg, status); 682 } 683 } 684 685 #include <sys/libkern.h> 686 687 void 688 get_random_bytes(void *p, size_t n) 689 { 690 uint8_t *dp = p; 691 692 while (n > 0) { 693 uint32_t v = karc4random(); 694 size_t nb = n > sizeof(uint32_t) ? sizeof(uint32_t) : n; 695 bcopy(&v, dp, n > sizeof(uint32_t) ? sizeof(uint32_t) : n); 696 dp += sizeof(uint32_t), n -= nb; 697 } 698 } 699 700 /* 701 * Helper function for events that pass just a single mac address. 702 */ 703 static void 704 notify_macaddr(struct ifnet *ifp, int op, const uint8_t mac[IEEE80211_ADDR_LEN]) 705 { 706 struct ieee80211_join_event iev; 707 708 memset(&iev, 0, sizeof(iev)); 709 IEEE80211_ADDR_COPY(iev.iev_addr, mac); 710 rt_ieee80211msg(ifp, op, &iev, sizeof(iev)); 711 } 712 713 void 714 ieee80211_notify_node_join(struct ieee80211_node *ni, int newassoc) 715 { 716 struct ieee80211vap *vap = ni->ni_vap; 717 struct ifnet *ifp = vap->iv_ifp; 718 719 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode join", 720 (ni == vap->iv_bss) ? "bss " : ""); 721 722 if (ni == vap->iv_bss) { 723 notify_macaddr(ifp, newassoc ? 724 RTM_IEEE80211_ASSOC : RTM_IEEE80211_REASSOC, ni->ni_bssid); 725 if_link_state_change(ifp); 726 } else { 727 notify_macaddr(ifp, newassoc ? 728 RTM_IEEE80211_JOIN : RTM_IEEE80211_REJOIN, ni->ni_macaddr); 729 } 730 } 731 732 void 733 ieee80211_notify_node_leave(struct ieee80211_node *ni) 734 { 735 struct ieee80211vap *vap = ni->ni_vap; 736 struct ifnet *ifp = vap->iv_ifp; 737 738 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode leave", 739 (ni == vap->iv_bss) ? "bss " : ""); 740 741 if (ni == vap->iv_bss) { 742 rt_ieee80211msg(ifp, RTM_IEEE80211_DISASSOC, NULL, 0); 743 if_link_state_change(ifp); 744 } else { 745 /* fire off wireless event station leaving */ 746 notify_macaddr(ifp, RTM_IEEE80211_LEAVE, ni->ni_macaddr); 747 } 748 } 749 750 void 751 ieee80211_notify_scan_done(struct ieee80211vap *vap) 752 { 753 struct ifnet *ifp = vap->iv_ifp; 754 755 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, "%s\n", "notify scan done"); 756 757 /* dispatch wireless event indicating scan completed */ 758 rt_ieee80211msg(ifp, RTM_IEEE80211_SCAN, NULL, 0); 759 } 760 761 void 762 ieee80211_notify_replay_failure(struct ieee80211vap *vap, 763 const struct ieee80211_frame *wh, const struct ieee80211_key *k, 764 u_int64_t rsc, int tid) 765 { 766 struct ifnet *ifp = vap->iv_ifp; 767 768 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2, 769 "%s replay detected <rsc %ju, csc %ju, keyix %u rxkeyix %u>", 770 k->wk_cipher->ic_name, (intmax_t) rsc, 771 (intmax_t) k->wk_keyrsc[tid], 772 k->wk_keyix, k->wk_rxkeyix); 773 774 if (ifp != NULL) { /* NB: for cipher test modules */ 775 struct ieee80211_replay_event iev; 776 777 IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1); 778 IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2); 779 iev.iev_cipher = k->wk_cipher->ic_cipher; 780 if (k->wk_rxkeyix != IEEE80211_KEYIX_NONE) 781 iev.iev_keyix = k->wk_rxkeyix; 782 else 783 iev.iev_keyix = k->wk_keyix; 784 iev.iev_keyrsc = k->wk_keyrsc[tid]; 785 iev.iev_rsc = rsc; 786 rt_ieee80211msg(ifp, RTM_IEEE80211_REPLAY, &iev, sizeof(iev)); 787 } 788 } 789 790 void 791 ieee80211_notify_michael_failure(struct ieee80211vap *vap, 792 const struct ieee80211_frame *wh, u_int keyix) 793 { 794 struct ifnet *ifp = vap->iv_ifp; 795 796 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2, 797 "michael MIC verification failed <keyix %u>", keyix); 798 vap->iv_stats.is_rx_tkipmic++; 799 800 if (ifp != NULL) { /* NB: for cipher test modules */ 801 struct ieee80211_michael_event iev; 802 803 IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1); 804 IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2); 805 iev.iev_cipher = IEEE80211_CIPHER_TKIP; 806 iev.iev_keyix = keyix; 807 rt_ieee80211msg(ifp, RTM_IEEE80211_MICHAEL, &iev, sizeof(iev)); 808 } 809 } 810 811 void 812 ieee80211_notify_wds_discover(struct ieee80211_node *ni) 813 { 814 struct ieee80211vap *vap = ni->ni_vap; 815 struct ifnet *ifp = vap->iv_ifp; 816 817 notify_macaddr(ifp, RTM_IEEE80211_WDS, ni->ni_macaddr); 818 } 819 820 void 821 ieee80211_notify_csa(struct ieee80211com *ic, 822 const struct ieee80211_channel *c, int mode, int count) 823 { 824 struct ifnet *ifp = ic->ic_ifp; 825 struct ieee80211_csa_event iev; 826 827 memset(&iev, 0, sizeof(iev)); 828 iev.iev_flags = c->ic_flags; 829 iev.iev_freq = c->ic_freq; 830 iev.iev_ieee = c->ic_ieee; 831 iev.iev_mode = mode; 832 iev.iev_count = count; 833 rt_ieee80211msg(ifp, RTM_IEEE80211_CSA, &iev, sizeof(iev)); 834 } 835 836 void 837 ieee80211_notify_radar(struct ieee80211com *ic, 838 const struct ieee80211_channel *c) 839 { 840 struct ifnet *ifp = ic->ic_ifp; 841 struct ieee80211_radar_event iev; 842 843 memset(&iev, 0, sizeof(iev)); 844 iev.iev_flags = c->ic_flags; 845 iev.iev_freq = c->ic_freq; 846 iev.iev_ieee = c->ic_ieee; 847 rt_ieee80211msg(ifp, RTM_IEEE80211_RADAR, &iev, sizeof(iev)); 848 } 849 850 void 851 ieee80211_notify_cac(struct ieee80211com *ic, 852 const struct ieee80211_channel *c, enum ieee80211_notify_cac_event type) 853 { 854 struct ifnet *ifp = ic->ic_ifp; 855 struct ieee80211_cac_event iev; 856 857 memset(&iev, 0, sizeof(iev)); 858 iev.iev_flags = c->ic_flags; 859 iev.iev_freq = c->ic_freq; 860 iev.iev_ieee = c->ic_ieee; 861 iev.iev_type = type; 862 rt_ieee80211msg(ifp, RTM_IEEE80211_CAC, &iev, sizeof(iev)); 863 } 864 865 void 866 ieee80211_notify_node_deauth(struct ieee80211_node *ni) 867 { 868 struct ieee80211vap *vap = ni->ni_vap; 869 struct ifnet *ifp = vap->iv_ifp; 870 871 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node deauth"); 872 873 notify_macaddr(ifp, RTM_IEEE80211_DEAUTH, ni->ni_macaddr); 874 } 875 876 void 877 ieee80211_notify_node_auth(struct ieee80211_node *ni) 878 { 879 struct ieee80211vap *vap = ni->ni_vap; 880 struct ifnet *ifp = vap->iv_ifp; 881 882 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node auth"); 883 884 notify_macaddr(ifp, RTM_IEEE80211_AUTH, ni->ni_macaddr); 885 } 886 887 void 888 ieee80211_notify_country(struct ieee80211vap *vap, 889 const uint8_t bssid[IEEE80211_ADDR_LEN], const uint8_t cc[2]) 890 { 891 struct ifnet *ifp = vap->iv_ifp; 892 struct ieee80211_country_event iev; 893 894 memset(&iev, 0, sizeof(iev)); 895 IEEE80211_ADDR_COPY(iev.iev_addr, bssid); 896 iev.iev_cc[0] = cc[0]; 897 iev.iev_cc[1] = cc[1]; 898 rt_ieee80211msg(ifp, RTM_IEEE80211_COUNTRY, &iev, sizeof(iev)); 899 } 900 901 void 902 ieee80211_notify_radio(struct ieee80211com *ic, int state) 903 { 904 struct ifnet *ifp = ic->ic_ifp; 905 struct ieee80211_radio_event iev; 906 907 memset(&iev, 0, sizeof(iev)); 908 iev.iev_state = state; 909 rt_ieee80211msg(ifp, RTM_IEEE80211_RADIO, &iev, sizeof(iev)); 910 } 911 912 /* IEEE Std 802.11a-1999, page 9, table 79 */ 913 #define IEEE80211_OFDM_SYM_TIME 4 914 #define IEEE80211_OFDM_PREAMBLE_TIME 16 915 #define IEEE80211_OFDM_SIGNAL_TIME 4 916 /* IEEE Std 802.11g-2003, page 44 */ 917 #define IEEE80211_OFDM_SIGNAL_EXT_TIME 6 918 919 /* IEEE Std 802.11a-1999, page 7, figure 107 */ 920 #define IEEE80211_OFDM_PLCP_SERVICE_NBITS 16 921 #define IEEE80211_OFDM_TAIL_NBITS 6 922 923 #define IEEE80211_OFDM_NBITS(frmlen) \ 924 (IEEE80211_OFDM_PLCP_SERVICE_NBITS + \ 925 ((frmlen) * NBBY) + \ 926 IEEE80211_OFDM_TAIL_NBITS) 927 928 #define IEEE80211_OFDM_NBITS_PER_SYM(kbps) \ 929 (((kbps) * IEEE80211_OFDM_SYM_TIME) / 1000) 930 931 #define IEEE80211_OFDM_NSYMS(kbps, frmlen) \ 932 howmany(IEEE80211_OFDM_NBITS((frmlen)), \ 933 IEEE80211_OFDM_NBITS_PER_SYM((kbps))) 934 935 #define IEEE80211_OFDM_TXTIME(kbps, frmlen) \ 936 (IEEE80211_OFDM_PREAMBLE_TIME + \ 937 IEEE80211_OFDM_SIGNAL_TIME + \ 938 (IEEE80211_OFDM_NSYMS((kbps), (frmlen)) * IEEE80211_OFDM_SYM_TIME)) 939 940 /* IEEE Std 802.11b-1999, page 28, subclause 18.3.4 */ 941 #define IEEE80211_CCK_PREAMBLE_LEN 144 942 #define IEEE80211_CCK_PLCP_HDR_TIME 48 943 #define IEEE80211_CCK_SHPREAMBLE_LEN 72 944 #define IEEE80211_CCK_SHPLCP_HDR_TIME 24 945 946 #define IEEE80211_CCK_NBITS(frmlen) ((frmlen) * NBBY) 947 #define IEEE80211_CCK_TXTIME(kbps, frmlen) \ 948 (((IEEE80211_CCK_NBITS((frmlen)) * 1000) + (kbps) - 1) / (kbps)) 949 950 uint16_t 951 ieee80211_txtime(struct ieee80211_node *ni, u_int len, uint8_t rs_rate, 952 uint32_t flags) 953 { 954 struct ieee80211vap *vap = ni->ni_vap; 955 uint16_t txtime; 956 int rate; 957 958 rs_rate &= IEEE80211_RATE_VAL; 959 rate = rs_rate * 500; /* ieee80211 rate -> kbps */ 960 961 if (vap->iv_ic->ic_phytype == IEEE80211_T_OFDM) { 962 /* 963 * IEEE Std 802.11a-1999, page 37, equation (29) 964 * IEEE Std 802.11g-2003, page 44, equation (42) 965 */ 966 txtime = IEEE80211_OFDM_TXTIME(rate, len); 967 if (vap->iv_ic->ic_curmode == IEEE80211_MODE_11G) 968 txtime += IEEE80211_OFDM_SIGNAL_EXT_TIME; 969 } else { 970 /* 971 * IEEE Std 802.11b-1999, page 28, subclause 18.3.4 972 * IEEE Std 802.11g-2003, page 45, equation (43) 973 */ 974 if (vap->iv_ic->ic_phytype == IEEE80211_T_OFDM_QUARTER+1) 975 ++len; 976 txtime = IEEE80211_CCK_TXTIME(rate, len); 977 978 /* 979 * Short preamble is not applicable for DS 1Mbits/s 980 */ 981 if (rs_rate != 2 && (flags & IEEE80211_F_SHPREAMBLE)) { 982 txtime += IEEE80211_CCK_SHPREAMBLE_LEN + 983 IEEE80211_CCK_SHPLCP_HDR_TIME; 984 } else { 985 txtime += IEEE80211_CCK_PREAMBLE_LEN + 986 IEEE80211_CCK_PLCP_HDR_TIME; 987 } 988 } 989 return txtime; 990 } 991 992 void 993 ieee80211_load_module(const char *modname) 994 { 995 996 #ifdef notyet 997 (void)kern_kldload(curthread, modname, NULL); 998 #else 999 kprintf("%s: load the %s module by hand for now.\n", __func__, modname); 1000 #endif 1001 } 1002 1003 static eventhandler_tag wlan_bpfevent; 1004 static eventhandler_tag wlan_ifllevent; 1005 1006 static void 1007 bpf_track_event(void *arg, struct ifnet *ifp, int dlt, int attach) 1008 { 1009 /* NB: identify vap's by if_start */ 1010 1011 if (dlt == DLT_IEEE802_11_RADIO && 1012 ifp->if_start == ieee80211_vap_start) { 1013 struct ieee80211vap *vap = ifp->if_softc; 1014 /* 1015 * Track bpf radiotap listener state. We mark the vap 1016 * to indicate if any listener is present and the com 1017 * to indicate if any listener exists on any associated 1018 * vap. This flag is used by drivers to prepare radiotap 1019 * state only when needed. 1020 */ 1021 if (attach) { 1022 ieee80211_syncflag_ext(vap, IEEE80211_FEXT_BPF); 1023 if (vap->iv_opmode == IEEE80211_M_MONITOR) 1024 atomic_add_int(&vap->iv_ic->ic_montaps, 1); 1025 } else if (!vap->iv_rawbpf) { 1026 ieee80211_syncflag_ext(vap, -IEEE80211_FEXT_BPF); 1027 if (vap->iv_opmode == IEEE80211_M_MONITOR) 1028 atomic_subtract_int(&vap->iv_ic->ic_montaps, 1); 1029 } 1030 } 1031 } 1032 1033 const char * 1034 ether_sprintf(const u_char *buf) 1035 { 1036 static char ethstr[MAXCPU][ETHER_ADDRSTRLEN + 1]; 1037 char *ptr = ethstr[mycpu->gd_cpuid]; 1038 1039 kether_ntoa(buf, ptr); 1040 return (ptr); 1041 } 1042 1043 static void 1044 wlan_iflladdr_event(void *arg __unused, struct ifnet *ifp) 1045 { 1046 struct ieee80211com *ic = ifp->if_l2com; 1047 struct ieee80211vap *vap, *next; 1048 1049 if (ifp->if_type != IFT_IEEE80211 || ic == NULL) { 1050 return; 1051 } 1052 1053 TAILQ_FOREACH_MUTABLE(vap, &ic->ic_vaps, iv_next, next) { 1054 /* 1055 * If the MAC address has changed on the parent and it was 1056 * copied to the vap on creation then re-sync. 1057 */ 1058 if (vap->iv_ic == ic && 1059 (vap->iv_flags_ext & IEEE80211_FEXT_UNIQMAC) == 0) { 1060 IEEE80211_ADDR_COPY(vap->iv_myaddr, IF_LLADDR(ifp)); 1061 if_setlladdr(vap->iv_ifp, IF_LLADDR(ifp), 1062 IEEE80211_ADDR_LEN); 1063 } 1064 } 1065 } 1066 1067 /* 1068 * Module glue. 1069 * 1070 * NB: the module name is "wlan" for compatibility with NetBSD. 1071 */ 1072 static int 1073 wlan_modevent(module_t mod, int type, void *unused) 1074 { 1075 int error; 1076 1077 switch (type) { 1078 case MOD_LOAD: 1079 if (bootverbose) 1080 kprintf("wlan: <802.11 Link Layer>\n"); 1081 wlan_bpfevent = EVENTHANDLER_REGISTER(bpf_track, 1082 bpf_track_event, 0, 1083 EVENTHANDLER_PRI_ANY); 1084 if (wlan_bpfevent == NULL) { 1085 error = ENOMEM; 1086 break; 1087 } 1088 wlan_ifllevent = EVENTHANDLER_REGISTER(iflladdr_event, 1089 wlan_iflladdr_event, NULL, 1090 EVENTHANDLER_PRI_ANY); 1091 if (wlan_ifllevent == NULL) { 1092 EVENTHANDLER_DEREGISTER(bpf_track, wlan_bpfevent); 1093 error = ENOMEM; 1094 break; 1095 } 1096 if_clone_attach(&wlan_cloner); 1097 if_register_com_alloc(IFT_IEEE80211, wlan_alloc, wlan_free); 1098 error = 0; 1099 break; 1100 case MOD_UNLOAD: 1101 if_deregister_com_alloc(IFT_IEEE80211); 1102 if_clone_detach(&wlan_cloner); 1103 EVENTHANDLER_DEREGISTER(bpf_track, wlan_bpfevent); 1104 EVENTHANDLER_DEREGISTER(iflladdr_event, wlan_ifllevent); 1105 error = 0; 1106 break; 1107 default: 1108 error = EINVAL; 1109 break; 1110 } 1111 return error; 1112 } 1113 1114 static moduledata_t wlan_mod = { 1115 "wlan", 1116 wlan_modevent, 1117 0 1118 }; 1119 DECLARE_MODULE(wlan, wlan_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST); 1120 MODULE_VERSION(wlan, 1); 1121 MODULE_DEPEND(wlan, ether, 1, 1, 1); 1122