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 ifp = ifunit(cp.icp_parent); 117 if (ifp == NULL) 118 return ENXIO; 119 /* XXX move printfs to DIAGNOSTIC before release */ 120 if (ifp->if_type != IFT_IEEE80211) { 121 if_printf(ifp, "%s: reject, not an 802.11 device\n", __func__); 122 return ENXIO; 123 } 124 if (cp.icp_opmode >= IEEE80211_OPMODE_MAX) { 125 if_printf(ifp, "%s: invalid opmode %d\n", 126 __func__, cp.icp_opmode); 127 return EINVAL; 128 } 129 ic = ifp->if_l2com; 130 if ((ic->ic_caps & ieee80211_opcap[cp.icp_opmode]) == 0) { 131 if_printf(ifp, "%s mode not supported\n", 132 ieee80211_opmode_name[cp.icp_opmode]); 133 return EOPNOTSUPP; 134 } 135 if ((cp.icp_flags & IEEE80211_CLONE_TDMA) && 136 #ifdef IEEE80211_SUPPORT_TDMA 137 (ic->ic_caps & IEEE80211_C_TDMA) == 0 138 #else 139 (1) 140 #endif 141 ) { 142 if_printf(ifp, "TDMA not supported\n"); 143 return EOPNOTSUPP; 144 } 145 vap = ic->ic_vap_create(ic, ifc->ifc_name, unit, 146 cp.icp_opmode, cp.icp_flags, cp.icp_bssid, 147 cp.icp_flags & IEEE80211_CLONE_MACADDR ? 148 cp.icp_macaddr : (const uint8_t *)IF_LLADDR(ifp)); 149 return (vap == NULL ? EIO : 0); 150 } 151 152 static int 153 wlan_clone_destroy(struct ifnet *ifp) 154 { 155 struct ieee80211vap *vap = ifp->if_softc; 156 struct ieee80211com *ic = vap->iv_ic; 157 158 wlan_serialize_enter(); /* WARNING must be global serializer */ 159 ic->ic_vap_delete(vap); 160 wlan_serialize_exit(); 161 162 return 0; 163 } 164 165 const char *wlan_last_enter_func; 166 const char *wlan_last_exit_func; 167 /* 168 * These serializer functions are used by wlan and all drivers. 169 */ 170 void 171 _wlan_serialize_enter(const char *funcname) 172 { 173 lwkt_serialize_enter(&wlan_global_serializer); 174 wlan_last_enter_func = funcname; 175 } 176 177 void 178 _wlan_serialize_exit(const char *funcname) 179 { 180 lwkt_serialize_exit(&wlan_global_serializer); 181 wlan_last_exit_func = funcname; 182 } 183 184 int 185 wlan_serialize_sleep(void *ident, int flags, const char *wmesg, int timo) 186 { 187 return(zsleep(ident, &wlan_global_serializer, flags, wmesg, timo)); 188 } 189 190 /* 191 * condition-var functions which interlock the ic lock (which is now 192 * just wlan_global_serializer) 193 */ 194 void 195 wlan_cv_init(struct cv *cv, const char *desc) 196 { 197 cv->cv_desc = desc; 198 cv->cv_waiters = 0; 199 } 200 201 int 202 wlan_cv_timedwait(struct cv *cv, int ticks) 203 { 204 int error; 205 206 ++cv->cv_waiters; 207 error = wlan_serialize_sleep(cv, 0, cv->cv_desc, ticks); 208 return (error); 209 } 210 211 void 212 wlan_cv_wait(struct cv *cv) 213 { 214 ++cv->cv_waiters; 215 wlan_serialize_sleep(cv, 0, cv->cv_desc, 0); 216 } 217 218 void 219 wlan_cv_signal(struct cv *cv, int broadcast) 220 { 221 if (cv->cv_waiters) { 222 if (broadcast) { 223 cv->cv_waiters = 0; 224 wakeup(cv); 225 } else { 226 --cv->cv_waiters; 227 wakeup_one(cv); 228 } 229 } 230 } 231 232 /* 233 * Misc 234 */ 235 void 236 ieee80211_vap_destroy(struct ieee80211vap *vap) 237 { 238 wlan_assert_serialized(); 239 wlan_serialize_exit(); 240 if_clone_destroy(vap->iv_ifp->if_xname); 241 wlan_serialize_enter(); 242 } 243 244 /* 245 * NOTE: This handler is used generally to convert milliseconds 246 * to ticks for various simple sysctl variables and does not 247 * need to be serialized. 248 */ 249 int 250 ieee80211_sysctl_msecs_ticks(SYSCTL_HANDLER_ARGS) 251 { 252 int msecs = ticks_to_msecs(*(int *)arg1); 253 int error, t; 254 255 error = sysctl_handle_int(oidp, &msecs, 0, req); 256 if (error == 0 && req->newptr) { 257 t = msecs_to_ticks(msecs); 258 *(int *)arg1 = (t < 1) ? 1 : t; 259 } 260 261 return error; 262 } 263 264 static int 265 ieee80211_sysctl_inact(SYSCTL_HANDLER_ARGS) 266 { 267 int inact = (*(int *)arg1) * IEEE80211_INACT_WAIT; 268 int error; 269 270 error = sysctl_handle_int(oidp, &inact, 0, req); 271 wlan_serialize_enter(); 272 if (error == 0 && req->newptr) 273 *(int *)arg1 = inact / IEEE80211_INACT_WAIT; 274 wlan_serialize_exit(); 275 276 return error; 277 } 278 279 static int 280 ieee80211_sysctl_parent(SYSCTL_HANDLER_ARGS) 281 { 282 struct ieee80211com *ic = arg1; 283 const char *name = ic->ic_ifp->if_xname; 284 285 return SYSCTL_OUT(req, name, strlen(name)); 286 } 287 288 static int 289 ieee80211_sysctl_radar(SYSCTL_HANDLER_ARGS) 290 { 291 struct ieee80211com *ic = arg1; 292 int t = 0, error; 293 294 error = sysctl_handle_int(oidp, &t, 0, req); 295 wlan_serialize_enter(); 296 if (error == 0 && req->newptr) 297 ieee80211_dfs_notify_radar(ic, ic->ic_curchan); 298 wlan_serialize_exit(); 299 300 return error; 301 } 302 303 void 304 ieee80211_sysctl_attach(struct ieee80211com *ic) 305 { 306 } 307 308 void 309 ieee80211_sysctl_detach(struct ieee80211com *ic) 310 { 311 } 312 313 void 314 ieee80211_sysctl_vattach(struct ieee80211vap *vap) 315 { 316 struct ifnet *ifp = vap->iv_ifp; 317 struct sysctl_ctx_list *ctx; 318 struct sysctl_oid *oid; 319 char num[14]; /* sufficient for 32 bits */ 320 321 ctx = (struct sysctl_ctx_list *) kmalloc(sizeof(struct sysctl_ctx_list), 322 M_DEVBUF, M_INTWAIT | M_ZERO); 323 if (ctx == NULL) { 324 if_printf(ifp, "%s: cannot allocate sysctl context!\n", 325 __func__); 326 return; 327 } 328 sysctl_ctx_init(ctx); 329 ksnprintf(num, sizeof(num), "%u", ifp->if_dunit); 330 oid = SYSCTL_ADD_NODE(ctx, &SYSCTL_NODE_CHILDREN(_net, wlan), 331 OID_AUTO, num, CTLFLAG_RD, NULL, ""); 332 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 333 "%parent", CTLFLAG_RD, vap->iv_ic, 0, 334 ieee80211_sysctl_parent, "A", "parent device"); 335 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 336 "driver_caps", CTLFLAG_RW, &vap->iv_caps, 0, 337 "driver capabilities"); 338 #ifdef IEEE80211_DEBUG 339 vap->iv_debug = ieee80211_debug; 340 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 341 "debug", CTLFLAG_RW, &vap->iv_debug, 0, 342 "control debugging printfs"); 343 #endif 344 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 345 "bmiss_max", CTLFLAG_RW, &vap->iv_bmiss_max, 0, 346 "consecutive beacon misses before scanning"); 347 /* XXX inherit from tunables */ 348 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 349 "inact_run", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_run, 0, 350 ieee80211_sysctl_inact, "I", 351 "station inactivity timeout (sec)"); 352 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 353 "inact_probe", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_probe, 0, 354 ieee80211_sysctl_inact, "I", 355 "station inactivity probe timeout (sec)"); 356 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 357 "inact_auth", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_auth, 0, 358 ieee80211_sysctl_inact, "I", 359 "station authentication timeout (sec)"); 360 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 361 "inact_init", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_init, 0, 362 ieee80211_sysctl_inact, "I", 363 "station initial state timeout (sec)"); 364 if (vap->iv_htcaps & IEEE80211_HTC_HT) { 365 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 366 "ampdu_mintraffic_bk", CTLFLAG_RW, 367 &vap->iv_ampdu_mintraffic[WME_AC_BK], 0, 368 "BK traffic tx aggr threshold (pps)"); 369 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 370 "ampdu_mintraffic_be", CTLFLAG_RW, 371 &vap->iv_ampdu_mintraffic[WME_AC_BE], 0, 372 "BE traffic tx aggr threshold (pps)"); 373 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 374 "ampdu_mintraffic_vo", CTLFLAG_RW, 375 &vap->iv_ampdu_mintraffic[WME_AC_VO], 0, 376 "VO traffic tx aggr threshold (pps)"); 377 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 378 "ampdu_mintraffic_vi", CTLFLAG_RW, 379 &vap->iv_ampdu_mintraffic[WME_AC_VI], 0, 380 "VI traffic tx aggr threshold (pps)"); 381 } 382 if (vap->iv_caps & IEEE80211_C_DFS) { 383 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 384 "radar", CTLTYPE_INT | CTLFLAG_RW, vap->iv_ic, 0, 385 ieee80211_sysctl_radar, "I", "simulate radar event"); 386 } 387 vap->iv_sysctl = ctx; 388 vap->iv_oid = oid; 389 } 390 391 void 392 ieee80211_sysctl_vdetach(struct ieee80211vap *vap) 393 { 394 395 if (vap->iv_sysctl != NULL) { 396 sysctl_ctx_free(vap->iv_sysctl); 397 kfree(vap->iv_sysctl, M_DEVBUF); 398 vap->iv_sysctl = NULL; 399 } 400 } 401 402 int 403 ieee80211_node_dectestref(struct ieee80211_node *ni) 404 { 405 /* XXX need equivalent of atomic_dec_and_test */ 406 atomic_subtract_int(&ni->ni_refcnt, 1); 407 return atomic_cmpset_int(&ni->ni_refcnt, 0, 1); 408 } 409 410 /* XXX this breaks ALTQ's packet scheduler */ 411 void 412 ieee80211_flush_ifq(struct ifaltq *ifq, struct ieee80211vap *vap) 413 { 414 struct ieee80211_node *ni; 415 struct mbuf *m, **mprev; 416 struct ifaltq_subque *ifsq = ifq_get_subq_default(ifq); 417 418 wlan_assert_serialized(); 419 420 ALTQ_SQ_LOCK(ifsq); 421 422 /* 423 * Fix normal queue 424 */ 425 mprev = &ifsq->ifsq_norm_head; 426 while ((m = *mprev) != NULL) { 427 ni = (struct ieee80211_node *)m->m_pkthdr.rcvif; 428 if (ni != NULL && ni->ni_vap == vap) { 429 *mprev = m->m_nextpkt; /* remove from list */ 430 ALTQ_SQ_CNTR_DEC(ifsq, m->m_pkthdr.len); 431 432 m_freem(m); 433 ieee80211_free_node(ni); /* reclaim ref */ 434 } else 435 mprev = &m->m_nextpkt; 436 } 437 /* recalculate tail ptr */ 438 m = ifsq->ifsq_norm_head; 439 for (; m != NULL && m->m_nextpkt != NULL; m = m->m_nextpkt) 440 ; 441 ifsq->ifsq_norm_tail = m; 442 443 /* 444 * Fix priority queue 445 */ 446 mprev = &ifsq->ifsq_prio_head; 447 while ((m = *mprev) != NULL) { 448 ni = (struct ieee80211_node *)m->m_pkthdr.rcvif; 449 if (ni != NULL && ni->ni_vap == vap) { 450 *mprev = m->m_nextpkt; /* remove from list */ 451 ALTQ_SQ_CNTR_DEC(ifsq, m->m_pkthdr.len); 452 ALTQ_SQ_PRIO_CNTR_DEC(ifsq, m->m_pkthdr.len); 453 454 m_freem(m); 455 ieee80211_free_node(ni); /* reclaim ref */ 456 } else 457 mprev = &m->m_nextpkt; 458 } 459 /* recalculate tail ptr */ 460 m = ifsq->ifsq_prio_head; 461 for (; m != NULL && m->m_nextpkt != NULL; m = m->m_nextpkt) 462 ; 463 ifsq->ifsq_prio_tail = m; 464 465 ALTQ_SQ_UNLOCK(ifsq); 466 } 467 468 /* 469 * As above, for mbufs allocated with m_gethdr/MGETHDR 470 * or initialized by M_COPY_PKTHDR. 471 */ 472 #define MC_ALIGN(m, len) \ 473 do { \ 474 (m)->m_data += (MCLBYTES - (len)) &~ (sizeof(long) - 1); \ 475 } while (/* CONSTCOND */ 0) 476 477 /* 478 * Allocate and setup a management frame of the specified 479 * size. We return the mbuf and a pointer to the start 480 * of the contiguous data area that's been reserved based 481 * on the packet length. The data area is forced to 32-bit 482 * alignment and the buffer length to a multiple of 4 bytes. 483 * This is done mainly so beacon frames (that require this) 484 * can use this interface too. 485 */ 486 struct mbuf * 487 ieee80211_getmgtframe(uint8_t **frm, int headroom, int pktlen) 488 { 489 struct mbuf *m; 490 u_int len; 491 492 /* 493 * NB: we know the mbuf routines will align the data area 494 * so we don't need to do anything special. 495 */ 496 len = roundup2(headroom + pktlen, 4); 497 KASSERT(len <= MCLBYTES, ("802.11 mgt frame too large: %u", len)); 498 if (len < MINCLSIZE) { 499 m = m_gethdr(MB_DONTWAIT, MT_DATA); 500 /* 501 * Align the data in case additional headers are added. 502 * This should only happen when a WEP header is added 503 * which only happens for shared key authentication mgt 504 * frames which all fit in MHLEN. 505 */ 506 if (m != NULL) 507 MH_ALIGN(m, len); 508 } else { 509 m = m_getcl(MB_DONTWAIT, MT_DATA, M_PKTHDR); 510 if (m != NULL) 511 MC_ALIGN(m, len); 512 } 513 if (m != NULL) { 514 m->m_data += headroom; 515 *frm = m->m_data; 516 } 517 return m; 518 } 519 520 /* 521 * Re-align the payload in the mbuf. This is mainly used (right now) 522 * to handle IP header alignment requirements on certain architectures. 523 */ 524 struct mbuf * 525 ieee80211_realign(struct ieee80211vap *vap, struct mbuf *m, size_t align) 526 { 527 int pktlen, space; 528 struct mbuf *n = NULL; 529 530 pktlen = m->m_pkthdr.len; 531 space = pktlen + align; 532 if (space < MINCLSIZE) 533 n = m_gethdr(MB_DONTWAIT, MT_DATA); 534 #ifdef notyet 535 else { 536 n = m_getjcl(MB_DONTWAIT, MT_DATA, M_PKTHDR, 537 space <= MCLBYTES ? MCLBYTES : 538 #if MJUMPAGESIZE != MCLBYTES 539 space <= MJUMPAGESIZE ? MJUMPAGESIZE : 540 #endif 541 space <= MJUM9BYTES ? MJUM9BYTES : MJUM16BYTES); 542 } 543 #endif 544 if (__predict_true(n != NULL)) { 545 m_move_pkthdr(n, m); 546 n->m_data = (caddr_t)(ALIGN(n->m_data + align) - align); 547 m_copydata(m, 0, pktlen, mtod(n, caddr_t)); 548 n->m_len = pktlen; 549 } else { 550 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 551 mtod(m, const struct ieee80211_frame *), NULL, 552 "%s", "no mbuf to realign"); 553 vap->iv_stats.is_rx_badalign++; 554 } 555 m_freem(m); 556 return n; 557 } 558 559 int 560 ieee80211_add_callback(struct mbuf *m, 561 void (*func)(struct ieee80211_node *, void *, int), void *arg) 562 { 563 struct m_tag *mtag; 564 struct ieee80211_cb *cb; 565 566 mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_CALLBACK, 567 sizeof(struct ieee80211_cb), M_INTWAIT); 568 if (mtag == NULL) 569 return 0; 570 571 cb = (struct ieee80211_cb *)(mtag+1); 572 cb->func = func; 573 cb->arg = arg; 574 m_tag_prepend(m, mtag); 575 m->m_flags |= M_TXCB; 576 return 1; 577 } 578 579 void 580 ieee80211_tx_complete(struct ieee80211_node *ni, struct mbuf *m, int status) 581 { 582 if (ni != NULL) { 583 if (m->m_flags & M_TXCB) 584 ieee80211_process_callback(ni, m, status); 585 ieee80211_free_node(ni); 586 } 587 m_freem(m); 588 } 589 590 void 591 ieee80211_process_callback(struct ieee80211_node *ni, 592 struct mbuf *m, int status) 593 { 594 struct m_tag *mtag; 595 596 mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_CALLBACK, NULL); 597 if (mtag != NULL) { 598 struct ieee80211_cb *cb = (struct ieee80211_cb *)(mtag+1); 599 cb->func(ni, cb->arg, status); 600 } 601 } 602 603 #include <sys/libkern.h> 604 605 void 606 get_random_bytes(void *p, size_t n) 607 { 608 uint8_t *dp = p; 609 610 while (n > 0) { 611 uint32_t v = karc4random(); 612 size_t nb = n > sizeof(uint32_t) ? sizeof(uint32_t) : n; 613 bcopy(&v, dp, n > sizeof(uint32_t) ? sizeof(uint32_t) : n); 614 dp += sizeof(uint32_t), n -= nb; 615 } 616 } 617 618 /* 619 * Helper function for events that pass just a single mac address. 620 */ 621 static void 622 notify_macaddr(struct ifnet *ifp, int op, const uint8_t mac[IEEE80211_ADDR_LEN]) 623 { 624 struct ieee80211_join_event iev; 625 626 memset(&iev, 0, sizeof(iev)); 627 IEEE80211_ADDR_COPY(iev.iev_addr, mac); 628 rt_ieee80211msg(ifp, op, &iev, sizeof(iev)); 629 } 630 631 void 632 ieee80211_notify_node_join(struct ieee80211_node *ni, int newassoc) 633 { 634 struct ieee80211vap *vap = ni->ni_vap; 635 struct ifnet *ifp = vap->iv_ifp; 636 637 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode join", 638 (ni == vap->iv_bss) ? "bss " : ""); 639 640 if (ni == vap->iv_bss) { 641 notify_macaddr(ifp, newassoc ? 642 RTM_IEEE80211_ASSOC : RTM_IEEE80211_REASSOC, ni->ni_bssid); 643 if_link_state_change(ifp); 644 } else { 645 notify_macaddr(ifp, newassoc ? 646 RTM_IEEE80211_JOIN : RTM_IEEE80211_REJOIN, ni->ni_macaddr); 647 } 648 } 649 650 void 651 ieee80211_notify_node_leave(struct ieee80211_node *ni) 652 { 653 struct ieee80211vap *vap = ni->ni_vap; 654 struct ifnet *ifp = vap->iv_ifp; 655 656 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode leave", 657 (ni == vap->iv_bss) ? "bss " : ""); 658 659 if (ni == vap->iv_bss) { 660 rt_ieee80211msg(ifp, RTM_IEEE80211_DISASSOC, NULL, 0); 661 if_link_state_change(ifp); 662 } else { 663 /* fire off wireless event station leaving */ 664 notify_macaddr(ifp, RTM_IEEE80211_LEAVE, ni->ni_macaddr); 665 } 666 } 667 668 void 669 ieee80211_notify_scan_done(struct ieee80211vap *vap) 670 { 671 struct ifnet *ifp = vap->iv_ifp; 672 673 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, "%s\n", "notify scan done"); 674 675 /* dispatch wireless event indicating scan completed */ 676 rt_ieee80211msg(ifp, RTM_IEEE80211_SCAN, NULL, 0); 677 } 678 679 void 680 ieee80211_notify_replay_failure(struct ieee80211vap *vap, 681 const struct ieee80211_frame *wh, const struct ieee80211_key *k, 682 u_int64_t rsc, int tid) 683 { 684 struct ifnet *ifp = vap->iv_ifp; 685 686 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2, 687 "%s replay detected <rsc %ju, csc %ju, keyix %u rxkeyix %u>", 688 k->wk_cipher->ic_name, (intmax_t) rsc, 689 (intmax_t) k->wk_keyrsc[tid], 690 k->wk_keyix, k->wk_rxkeyix); 691 692 if (ifp != NULL) { /* NB: for cipher test modules */ 693 struct ieee80211_replay_event iev; 694 695 IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1); 696 IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2); 697 iev.iev_cipher = k->wk_cipher->ic_cipher; 698 if (k->wk_rxkeyix != IEEE80211_KEYIX_NONE) 699 iev.iev_keyix = k->wk_rxkeyix; 700 else 701 iev.iev_keyix = k->wk_keyix; 702 iev.iev_keyrsc = k->wk_keyrsc[tid]; 703 iev.iev_rsc = rsc; 704 rt_ieee80211msg(ifp, RTM_IEEE80211_REPLAY, &iev, sizeof(iev)); 705 } 706 } 707 708 void 709 ieee80211_notify_michael_failure(struct ieee80211vap *vap, 710 const struct ieee80211_frame *wh, u_int keyix) 711 { 712 struct ifnet *ifp = vap->iv_ifp; 713 714 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2, 715 "michael MIC verification failed <keyix %u>", keyix); 716 vap->iv_stats.is_rx_tkipmic++; 717 718 if (ifp != NULL) { /* NB: for cipher test modules */ 719 struct ieee80211_michael_event iev; 720 721 IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1); 722 IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2); 723 iev.iev_cipher = IEEE80211_CIPHER_TKIP; 724 iev.iev_keyix = keyix; 725 rt_ieee80211msg(ifp, RTM_IEEE80211_MICHAEL, &iev, sizeof(iev)); 726 } 727 } 728 729 void 730 ieee80211_notify_wds_discover(struct ieee80211_node *ni) 731 { 732 struct ieee80211vap *vap = ni->ni_vap; 733 struct ifnet *ifp = vap->iv_ifp; 734 735 notify_macaddr(ifp, RTM_IEEE80211_WDS, ni->ni_macaddr); 736 } 737 738 void 739 ieee80211_notify_csa(struct ieee80211com *ic, 740 const struct ieee80211_channel *c, int mode, int count) 741 { 742 struct ifnet *ifp = ic->ic_ifp; 743 struct ieee80211_csa_event iev; 744 745 memset(&iev, 0, sizeof(iev)); 746 iev.iev_flags = c->ic_flags; 747 iev.iev_freq = c->ic_freq; 748 iev.iev_ieee = c->ic_ieee; 749 iev.iev_mode = mode; 750 iev.iev_count = count; 751 rt_ieee80211msg(ifp, RTM_IEEE80211_CSA, &iev, sizeof(iev)); 752 } 753 754 void 755 ieee80211_notify_radar(struct ieee80211com *ic, 756 const struct ieee80211_channel *c) 757 { 758 struct ifnet *ifp = ic->ic_ifp; 759 struct ieee80211_radar_event iev; 760 761 memset(&iev, 0, sizeof(iev)); 762 iev.iev_flags = c->ic_flags; 763 iev.iev_freq = c->ic_freq; 764 iev.iev_ieee = c->ic_ieee; 765 rt_ieee80211msg(ifp, RTM_IEEE80211_RADAR, &iev, sizeof(iev)); 766 } 767 768 void 769 ieee80211_notify_cac(struct ieee80211com *ic, 770 const struct ieee80211_channel *c, enum ieee80211_notify_cac_event type) 771 { 772 struct ifnet *ifp = ic->ic_ifp; 773 struct ieee80211_cac_event iev; 774 775 memset(&iev, 0, sizeof(iev)); 776 iev.iev_flags = c->ic_flags; 777 iev.iev_freq = c->ic_freq; 778 iev.iev_ieee = c->ic_ieee; 779 iev.iev_type = type; 780 rt_ieee80211msg(ifp, RTM_IEEE80211_CAC, &iev, sizeof(iev)); 781 } 782 783 void 784 ieee80211_notify_node_deauth(struct ieee80211_node *ni) 785 { 786 struct ieee80211vap *vap = ni->ni_vap; 787 struct ifnet *ifp = vap->iv_ifp; 788 789 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node deauth"); 790 791 notify_macaddr(ifp, RTM_IEEE80211_DEAUTH, ni->ni_macaddr); 792 } 793 794 void 795 ieee80211_notify_node_auth(struct ieee80211_node *ni) 796 { 797 struct ieee80211vap *vap = ni->ni_vap; 798 struct ifnet *ifp = vap->iv_ifp; 799 800 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node auth"); 801 802 notify_macaddr(ifp, RTM_IEEE80211_AUTH, ni->ni_macaddr); 803 } 804 805 void 806 ieee80211_notify_country(struct ieee80211vap *vap, 807 const uint8_t bssid[IEEE80211_ADDR_LEN], const uint8_t cc[2]) 808 { 809 struct ifnet *ifp = vap->iv_ifp; 810 struct ieee80211_country_event iev; 811 812 memset(&iev, 0, sizeof(iev)); 813 IEEE80211_ADDR_COPY(iev.iev_addr, bssid); 814 iev.iev_cc[0] = cc[0]; 815 iev.iev_cc[1] = cc[1]; 816 rt_ieee80211msg(ifp, RTM_IEEE80211_COUNTRY, &iev, sizeof(iev)); 817 } 818 819 void 820 ieee80211_notify_radio(struct ieee80211com *ic, int state) 821 { 822 struct ifnet *ifp = ic->ic_ifp; 823 struct ieee80211_radio_event iev; 824 825 memset(&iev, 0, sizeof(iev)); 826 iev.iev_state = state; 827 rt_ieee80211msg(ifp, RTM_IEEE80211_RADIO, &iev, sizeof(iev)); 828 } 829 830 int 831 ieee80211_handoff(struct ifnet *dst_ifp, struct mbuf *m) 832 { 833 struct mbuf *m0; 834 835 /* We may be sending a fragment so traverse the mbuf */ 836 wlan_assert_serialized(); 837 wlan_serialize_exit(); 838 for (; m; m = m0) { 839 struct altq_pktattr pktattr; 840 841 m0 = m->m_nextpkt; 842 m->m_nextpkt = NULL; 843 844 if (ifq_is_enabled(&dst_ifp->if_snd)) 845 altq_etherclassify(&dst_ifp->if_snd, m, &pktattr); 846 847 ifq_dispatch(dst_ifp, m, &pktattr); 848 } 849 wlan_serialize_enter(); 850 851 return (0); 852 } 853 854 /* IEEE Std 802.11a-1999, page 9, table 79 */ 855 #define IEEE80211_OFDM_SYM_TIME 4 856 #define IEEE80211_OFDM_PREAMBLE_TIME 16 857 #define IEEE80211_OFDM_SIGNAL_TIME 4 858 /* IEEE Std 802.11g-2003, page 44 */ 859 #define IEEE80211_OFDM_SIGNAL_EXT_TIME 6 860 861 /* IEEE Std 802.11a-1999, page 7, figure 107 */ 862 #define IEEE80211_OFDM_PLCP_SERVICE_NBITS 16 863 #define IEEE80211_OFDM_TAIL_NBITS 6 864 865 #define IEEE80211_OFDM_NBITS(frmlen) \ 866 (IEEE80211_OFDM_PLCP_SERVICE_NBITS + \ 867 ((frmlen) * NBBY) + \ 868 IEEE80211_OFDM_TAIL_NBITS) 869 870 #define IEEE80211_OFDM_NBITS_PER_SYM(kbps) \ 871 (((kbps) * IEEE80211_OFDM_SYM_TIME) / 1000) 872 873 #define IEEE80211_OFDM_NSYMS(kbps, frmlen) \ 874 howmany(IEEE80211_OFDM_NBITS((frmlen)), \ 875 IEEE80211_OFDM_NBITS_PER_SYM((kbps))) 876 877 #define IEEE80211_OFDM_TXTIME(kbps, frmlen) \ 878 (IEEE80211_OFDM_PREAMBLE_TIME + \ 879 IEEE80211_OFDM_SIGNAL_TIME + \ 880 (IEEE80211_OFDM_NSYMS((kbps), (frmlen)) * IEEE80211_OFDM_SYM_TIME)) 881 882 /* IEEE Std 802.11b-1999, page 28, subclause 18.3.4 */ 883 #define IEEE80211_CCK_PREAMBLE_LEN 144 884 #define IEEE80211_CCK_PLCP_HDR_TIME 48 885 #define IEEE80211_CCK_SHPREAMBLE_LEN 72 886 #define IEEE80211_CCK_SHPLCP_HDR_TIME 24 887 888 #define IEEE80211_CCK_NBITS(frmlen) ((frmlen) * NBBY) 889 #define IEEE80211_CCK_TXTIME(kbps, frmlen) \ 890 (((IEEE80211_CCK_NBITS((frmlen)) * 1000) + (kbps) - 1) / (kbps)) 891 892 uint16_t 893 ieee80211_txtime(struct ieee80211_node *ni, u_int len, uint8_t rs_rate, 894 uint32_t flags) 895 { 896 struct ieee80211vap *vap = ni->ni_vap; 897 uint16_t txtime; 898 int rate; 899 900 rs_rate &= IEEE80211_RATE_VAL; 901 rate = rs_rate * 500; /* ieee80211 rate -> kbps */ 902 903 if (vap->iv_ic->ic_phytype == IEEE80211_T_OFDM) { 904 /* 905 * IEEE Std 802.11a-1999, page 37, equation (29) 906 * IEEE Std 802.11g-2003, page 44, equation (42) 907 */ 908 txtime = IEEE80211_OFDM_TXTIME(rate, len); 909 if (vap->iv_ic->ic_curmode == IEEE80211_MODE_11G) 910 txtime += IEEE80211_OFDM_SIGNAL_EXT_TIME; 911 } else { 912 /* 913 * IEEE Std 802.11b-1999, page 28, subclause 18.3.4 914 * IEEE Std 802.11g-2003, page 45, equation (43) 915 */ 916 if (vap->iv_ic->ic_phytype == IEEE80211_T_OFDM_QUARTER+1) 917 ++len; 918 txtime = IEEE80211_CCK_TXTIME(rate, len); 919 920 /* 921 * Short preamble is not applicable for DS 1Mbits/s 922 */ 923 if (rs_rate != 2 && (flags & IEEE80211_F_SHPREAMBLE)) { 924 txtime += IEEE80211_CCK_SHPREAMBLE_LEN + 925 IEEE80211_CCK_SHPLCP_HDR_TIME; 926 } else { 927 txtime += IEEE80211_CCK_PREAMBLE_LEN + 928 IEEE80211_CCK_PLCP_HDR_TIME; 929 } 930 } 931 return txtime; 932 } 933 934 void 935 ieee80211_load_module(const char *modname) 936 { 937 938 #ifdef notyet 939 (void)kern_kldload(curthread, modname, NULL); 940 #else 941 kprintf("%s: load the %s module by hand for now.\n", __func__, modname); 942 #endif 943 } 944 945 static eventhandler_tag wlan_bpfevent; 946 static eventhandler_tag wlan_ifllevent; 947 948 static void 949 bpf_track_event(void *arg, struct ifnet *ifp, int dlt, int attach) 950 { 951 /* NB: identify vap's by if_start */ 952 953 wlan_serialize_enter(); 954 if (dlt == DLT_IEEE802_11_RADIO && ifp->if_start == ieee80211_start) { 955 struct ieee80211vap *vap = ifp->if_softc; 956 /* 957 * Track bpf radiotap listener state. We mark the vap 958 * to indicate if any listener is present and the com 959 * to indicate if any listener exists on any associated 960 * vap. This flag is used by drivers to prepare radiotap 961 * state only when needed. 962 */ 963 if (attach) { 964 ieee80211_syncflag_ext(vap, IEEE80211_FEXT_BPF); 965 if (vap->iv_opmode == IEEE80211_M_MONITOR) 966 atomic_add_int(&vap->iv_ic->ic_montaps, 1); 967 } else if (!vap->iv_rawbpf) { 968 ieee80211_syncflag_ext(vap, -IEEE80211_FEXT_BPF); 969 if (vap->iv_opmode == IEEE80211_M_MONITOR) 970 atomic_subtract_int(&vap->iv_ic->ic_montaps, 1); 971 } 972 } 973 wlan_serialize_exit(); 974 } 975 976 static void 977 wlan_iflladdr_event(void *arg __unused, struct ifnet *ifp) 978 { 979 struct ieee80211com *ic = ifp->if_l2com; 980 struct ieee80211vap *vap, *next; 981 982 wlan_serialize_enter(); 983 if (ifp->if_type != IFT_IEEE80211 || ic == NULL) { 984 wlan_serialize_exit(); 985 return; 986 } 987 988 TAILQ_FOREACH_MUTABLE(vap, &ic->ic_vaps, iv_next, next) { 989 /* 990 * If the MAC address has changed on the parent and it was 991 * copied to the vap on creation then re-sync. 992 */ 993 if (vap->iv_ic == ic && 994 (vap->iv_flags_ext & IEEE80211_FEXT_UNIQMAC) == 0) { 995 IEEE80211_ADDR_COPY(vap->iv_myaddr, IF_LLADDR(ifp)); 996 wlan_serialize_exit(); 997 if_setlladdr(vap->iv_ifp, IF_LLADDR(ifp), 998 IEEE80211_ADDR_LEN); 999 wlan_serialize_enter(); 1000 } 1001 } 1002 wlan_serialize_exit(); 1003 } 1004 1005 /* 1006 * Module glue. 1007 * 1008 * NB: the module name is "wlan" for compatibility with NetBSD. 1009 */ 1010 static int 1011 wlan_modevent(module_t mod, int type, void *unused) 1012 { 1013 int error; 1014 1015 wlan_serialize_enter(); 1016 1017 switch (type) { 1018 case MOD_LOAD: 1019 if (bootverbose) 1020 kprintf("wlan: <802.11 Link Layer>\n"); 1021 wlan_bpfevent = EVENTHANDLER_REGISTER(bpf_track, 1022 bpf_track_event, 0, 1023 EVENTHANDLER_PRI_ANY); 1024 if (wlan_bpfevent == NULL) { 1025 error = ENOMEM; 1026 break; 1027 } 1028 wlan_ifllevent = EVENTHANDLER_REGISTER(iflladdr_event, 1029 wlan_iflladdr_event, NULL, 1030 EVENTHANDLER_PRI_ANY); 1031 if (wlan_ifllevent == NULL) { 1032 EVENTHANDLER_DEREGISTER(bpf_track, wlan_bpfevent); 1033 error = ENOMEM; 1034 break; 1035 } 1036 if_clone_attach(&wlan_cloner); 1037 if_register_com_alloc(IFT_IEEE80211, wlan_alloc, wlan_free); 1038 error = 0; 1039 break; 1040 case MOD_UNLOAD: 1041 if_deregister_com_alloc(IFT_IEEE80211); 1042 if_clone_detach(&wlan_cloner); 1043 EVENTHANDLER_DEREGISTER(bpf_track, wlan_bpfevent); 1044 EVENTHANDLER_DEREGISTER(iflladdr_event, wlan_ifllevent); 1045 error = 0; 1046 break; 1047 default: 1048 error = EINVAL; 1049 break; 1050 } 1051 wlan_serialize_exit(); 1052 1053 return error; 1054 } 1055 1056 static moduledata_t wlan_mod = { 1057 "wlan", 1058 wlan_modevent, 1059 0 1060 }; 1061 DECLARE_MODULE(wlan, wlan_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST); 1062 MODULE_VERSION(wlan, 1); 1063 MODULE_DEPEND(wlan, ether, 1, 1, 1); 1064