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/malloc.h> 38 #include <sys/mbuf.h> 39 #include <sys/module.h> 40 #include <sys/proc.h> 41 #include <sys/sysctl.h> 42 43 #include <sys/socket.h> 44 45 #include <net/bpf.h> 46 #include <net/if.h> 47 #include <net/if_dl.h> 48 #include <net/if_clone.h> 49 #include <net/if_media.h> 50 #include <net/if_types.h> 51 #include <net/ethernet.h> 52 #include <net/route.h> 53 #include <net/ifq_var.h> 54 55 #include <netproto/802_11/ieee80211_var.h> 56 #include <netproto/802_11/ieee80211_input.h> 57 58 SYSCTL_NODE(_net, OID_AUTO, wlan, CTLFLAG_RD, 0, "IEEE 80211 parameters"); 59 60 #ifdef IEEE80211_DEBUG 61 int ieee80211_debug = 0; 62 SYSCTL_INT(_net_wlan, OID_AUTO, debug, CTLFLAG_RW, &ieee80211_debug, 63 0, "debugging printfs"); 64 #endif 65 66 int ieee80211_force_swcrypto = 0; 67 SYSCTL_INT(_net_wlan, OID_AUTO, force_swcrypto, CTLFLAG_RW, 68 &ieee80211_force_swcrypto, 0, "force software crypto"); 69 70 static int wlan_clone_destroy(struct ifnet *); 71 static int wlan_clone_create(struct if_clone *, int, caddr_t); 72 73 static struct if_clone wlan_cloner = 74 IF_CLONE_INITIALIZER("wlan", wlan_clone_create, wlan_clone_destroy, 75 0, IF_MAXUNIT); 76 77 struct lwkt_serialize wlan_global_serializer = LWKT_SERIALIZE_INITIALIZER; 78 79 static int 80 wlan_clone_create(struct if_clone *ifc, int unit, caddr_t params) 81 { 82 struct ieee80211_clone_params cp; 83 struct ieee80211vap *vap; 84 struct ieee80211com *ic; 85 int error; 86 87 error = copyin(params, &cp, sizeof(cp)); 88 if (error) 89 return error; 90 91 ic = ieee80211_find_com(cp.icp_parent); 92 if (ic == NULL) 93 return ENXIO; 94 if (cp.icp_opmode >= IEEE80211_OPMODE_MAX) { 95 ic_printf(ic, "%s: invalid opmode %d\n", __func__, 96 cp.icp_opmode); 97 return EINVAL; 98 } 99 if ((ic->ic_caps & ieee80211_opcap[cp.icp_opmode]) == 0) { 100 ic_printf(ic, "%s mode not supported\n", 101 ieee80211_opmode_name[cp.icp_opmode]); 102 return EOPNOTSUPP; 103 } 104 if ((cp.icp_flags & IEEE80211_CLONE_TDMA) && 105 #ifdef IEEE80211_SUPPORT_TDMA 106 (ic->ic_caps & IEEE80211_C_TDMA) == 0 107 #else 108 (1) 109 #endif 110 ) { 111 ic_printf(ic, "TDMA not supported\n"); 112 return EOPNOTSUPP; 113 } 114 vap = ic->ic_vap_create(ic, ifc->ifc_name, unit, 115 cp.icp_opmode, cp.icp_flags, cp.icp_bssid, 116 cp.icp_flags & IEEE80211_CLONE_MACADDR ? 117 cp.icp_macaddr : ic->ic_macaddr); 118 119 120 return (vap == NULL ? EIO : 0); 121 } 122 123 static int 124 wlan_clone_destroy(struct ifnet *ifp) 125 { 126 struct ieee80211vap *vap = ifp->if_softc; 127 struct ieee80211com *ic = vap->iv_ic; 128 129 ic->ic_vap_delete(vap); 130 131 return 0; 132 } 133 134 const char *wlan_last_enter_func; 135 const char *wlan_last_exit_func; 136 137 /* 138 * These serializer functions are used by wlan and all drivers. 139 * They are not recursive. The serializer must be held on 140 * any OACTIVE interactions. Dragonfly automatically holds 141 * the serializer on most ifp->if_*() calls but calls made 142 * from wlan into ath might not. 143 */ 144 void 145 _wlan_serialize_enter(const char *funcname) 146 { 147 lwkt_serialize_enter(&wlan_global_serializer); 148 wlan_last_enter_func = funcname; 149 } 150 151 void 152 _wlan_serialize_exit(const char *funcname) 153 { 154 lwkt_serialize_exit(&wlan_global_serializer); 155 wlan_last_exit_func = funcname; 156 } 157 158 int 159 _wlan_is_serialized(void) 160 { 161 return (IS_SERIALIZED(&wlan_global_serializer)); 162 } 163 164 /* 165 * Push/pop allows the wlan serializer to be entered recursively. 166 */ 167 int 168 _wlan_serialize_push(const char *funcname) 169 { 170 if (IS_SERIALIZED(&wlan_global_serializer)) { 171 return 0; 172 } else { 173 _wlan_serialize_enter(funcname); 174 return 1; 175 } 176 } 177 178 void 179 _wlan_serialize_pop(const char *funcname, int wst) 180 { 181 if (wst) { 182 _wlan_serialize_exit(funcname); 183 } 184 } 185 186 #if 0 187 188 int 189 wlan_serialize_sleep(void *ident, int flags, const char *wmesg, int timo) 190 { 191 return(zsleep(ident, &wlan_global_serializer, flags, wmesg, timo)); 192 } 193 194 /* 195 * condition-var functions which interlock the ic lock (which is now 196 * just wlan_global_serializer) 197 */ 198 void 199 wlan_cv_init(struct cv *cv, const char *desc) 200 { 201 cv->cv_desc = desc; 202 cv->cv_waiters = 0; 203 } 204 205 int 206 wlan_cv_timedwait(struct cv *cv, int ticks) 207 { 208 int error; 209 210 ++cv->cv_waiters; 211 error = wlan_serialize_sleep(cv, 0, cv->cv_desc, ticks); 212 return (error); 213 } 214 215 void 216 wlan_cv_wait(struct cv *cv) 217 { 218 ++cv->cv_waiters; 219 wlan_serialize_sleep(cv, 0, cv->cv_desc, 0); 220 } 221 222 void 223 wlan_cv_signal(struct cv *cv, int broadcast) 224 { 225 if (cv->cv_waiters) { 226 if (broadcast) { 227 cv->cv_waiters = 0; 228 wakeup(cv); 229 } else { 230 --cv->cv_waiters; 231 wakeup_one(cv); 232 } 233 } 234 } 235 236 #endif 237 238 /* 239 * Add RX parameters to the given mbuf. 240 * 241 * Returns 1 if OK, 0 on error. 242 */ 243 int 244 ieee80211_add_rx_params(struct mbuf *m, const struct ieee80211_rx_stats *rxs) 245 { 246 struct m_tag *mtag; 247 struct ieee80211_rx_params *rx; 248 249 mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_RECV_PARAMS, 250 sizeof(struct ieee80211_rx_stats), M_NOWAIT); 251 if (mtag == NULL) 252 return (0); 253 254 rx = (struct ieee80211_rx_params *)(mtag + 1); 255 memcpy(&rx->params, rxs, sizeof(*rxs)); 256 m_tag_prepend(m, mtag); 257 return (1); 258 } 259 260 int 261 ieee80211_get_rx_params(struct mbuf *m, struct ieee80211_rx_stats *rxs) 262 { 263 struct m_tag *mtag; 264 struct ieee80211_rx_params *rx; 265 266 mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_RECV_PARAMS, 267 NULL); 268 if (mtag == NULL) 269 return (-1); 270 rx = (struct ieee80211_rx_params *)(mtag + 1); 271 memcpy(rxs, &rx->params, sizeof(*rxs)); 272 return (0); 273 } 274 275 /* 276 * Misc 277 */ 278 int 279 ieee80211_vap_xmitpkt(struct ieee80211vap *vap, struct mbuf *m) 280 { 281 struct ifnet *ifp = vap->iv_ifp; 282 struct ifaltq_subque *ifsq = ifq_get_subq_default(&ifp->if_snd); 283 int error; 284 int wst; 285 286 /* 287 * When transmitting via the VAP, we shouldn't hold 288 * any IC TX lock as the VAP TX path will acquire it. 289 */ 290 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 291 292 error = ifsq_enqueue(ifsq, m, NULL); 293 if (error) 294 IFNET_STAT_INC(ifp, oqdrops, 1); 295 wst = wlan_serialize_push(); 296 ifp->if_start(ifp, ifsq); 297 wlan_serialize_pop(wst); 298 299 return error; 300 } 301 302 int 303 ieee80211_parent_xmitpkt(struct ieee80211com *ic, struct mbuf *m) 304 { 305 int error; 306 307 /* 308 * Assert the IC TX lock is held - this enforces the 309 * processing -> queuing order is maintained 310 */ 311 IEEE80211_TX_LOCK_ASSERT(ic); 312 error = ic->ic_transmit(ic, m); 313 if (error) { 314 struct ieee80211_node *ni; 315 316 ni = (struct ieee80211_node *)m->m_pkthdr.rcvif; 317 318 /* XXX number of fragments */ 319 IFNET_STAT_INC(ni->ni_vap->iv_ifp, oerrors, 1); 320 ieee80211_free_node(ni); 321 ieee80211_free_mbuf(m); 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 /* 335 * Make sure we con't end up in an infinite loop in ieee80211_ifdetach 336 * when if_clone_destroy fails. 337 */ 338 KKASSERT(if_clone_destroy(vap->iv_ifp->if_xname) == 0); 339 wlan_serialize_enter(); 340 } 341 342 /* 343 * NOTE: This handler is used generally to convert milliseconds 344 * to ticks for various simple sysctl variables and does not 345 * need to be serialized. 346 */ 347 int 348 ieee80211_sysctl_msecs_ticks(SYSCTL_HANDLER_ARGS) 349 { 350 int msecs = ticks_to_msecs(*(int *)arg1); 351 int error, t; 352 353 error = sysctl_handle_int(oidp, &msecs, 0, req); 354 if (error == 0 && req->newptr) { 355 t = msecs_to_ticks(msecs); 356 *(int *)arg1 = (t < 1) ? 1 : t; 357 } 358 359 return error; 360 } 361 362 static int 363 ieee80211_sysctl_inact(SYSCTL_HANDLER_ARGS) 364 { 365 int inact = (*(int *)arg1) * IEEE80211_INACT_WAIT; 366 int error; 367 368 error = sysctl_handle_int(oidp, &inact, 0, req); 369 if (error == 0 && req->newptr) 370 *(int *)arg1 = inact / IEEE80211_INACT_WAIT; 371 372 return error; 373 } 374 375 static int 376 ieee80211_sysctl_parent(SYSCTL_HANDLER_ARGS) 377 { 378 struct ieee80211com *ic = arg1; 379 const char *name = ic->ic_name; 380 381 return SYSCTL_OUT(req, name, strlen(name)); 382 } 383 384 static int 385 ieee80211_sysctl_radar(SYSCTL_HANDLER_ARGS) 386 { 387 struct ieee80211com *ic = arg1; 388 int t = 0, error; 389 390 error = sysctl_handle_int(oidp, &t, 0, req); 391 if (error == 0 && req->newptr) 392 ieee80211_dfs_notify_radar(ic, ic->ic_curchan); 393 394 return error; 395 } 396 397 void 398 ieee80211_sysctl_attach(struct ieee80211com *ic) 399 { 400 } 401 402 void 403 ieee80211_sysctl_detach(struct ieee80211com *ic) 404 { 405 } 406 407 void 408 ieee80211_sysctl_vattach(struct ieee80211vap *vap) 409 { 410 struct ifnet *ifp = vap->iv_ifp; 411 struct sysctl_ctx_list *ctx; 412 struct sysctl_oid *oid; 413 char num[14]; /* sufficient for 32 bits */ 414 415 ctx = (struct sysctl_ctx_list *) kmalloc(sizeof(struct sysctl_ctx_list), 416 M_DEVBUF, M_INTWAIT | M_ZERO); 417 if (ctx == NULL) { 418 if_printf(ifp, "%s: cannot allocate sysctl context!\n", 419 __func__); 420 return; 421 } 422 sysctl_ctx_init(ctx); 423 ksnprintf(num, sizeof(num), "%u", ifp->if_dunit); 424 oid = SYSCTL_ADD_NODE(ctx, &SYSCTL_NODE_CHILDREN(_net, wlan), 425 OID_AUTO, num, CTLFLAG_RD, NULL, ""); 426 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 427 "%parent", CTLFLAG_RD, vap->iv_ic, 0, 428 ieee80211_sysctl_parent, "A", "parent device"); 429 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 430 "driver_caps", CTLFLAG_RW, &vap->iv_caps, 0, 431 "driver capabilities"); 432 #ifdef IEEE80211_DEBUG 433 vap->iv_debug = ieee80211_debug; 434 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 435 "debug", CTLFLAG_RW, &vap->iv_debug, 0, 436 "control debugging printfs"); 437 #endif 438 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 439 "bmiss_max", CTLFLAG_RW, &vap->iv_bmiss_max, 0, 440 "consecutive beacon misses before scanning"); 441 /* XXX inherit from tunables */ 442 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 443 "inact_run", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_run, 0, 444 ieee80211_sysctl_inact, "I", 445 "station inactivity timeout (sec)"); 446 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 447 "inact_probe", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_probe, 0, 448 ieee80211_sysctl_inact, "I", 449 "station inactivity probe timeout (sec)"); 450 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 451 "inact_auth", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_auth, 0, 452 ieee80211_sysctl_inact, "I", 453 "station authentication timeout (sec)"); 454 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 455 "inact_init", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_init, 0, 456 ieee80211_sysctl_inact, "I", 457 "station initial state timeout (sec)"); 458 if (vap->iv_htcaps & IEEE80211_HTC_HT) { 459 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 460 "ampdu_mintraffic_bk", CTLFLAG_RW, 461 &vap->iv_ampdu_mintraffic[WME_AC_BK], 0, 462 "BK traffic tx aggr threshold (pps)"); 463 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 464 "ampdu_mintraffic_be", CTLFLAG_RW, 465 &vap->iv_ampdu_mintraffic[WME_AC_BE], 0, 466 "BE traffic tx aggr threshold (pps)"); 467 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 468 "ampdu_mintraffic_vo", CTLFLAG_RW, 469 &vap->iv_ampdu_mintraffic[WME_AC_VO], 0, 470 "VO traffic tx aggr threshold (pps)"); 471 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 472 "ampdu_mintraffic_vi", CTLFLAG_RW, 473 &vap->iv_ampdu_mintraffic[WME_AC_VI], 0, 474 "VI traffic tx aggr threshold (pps)"); 475 } 476 if (vap->iv_caps & IEEE80211_C_DFS) { 477 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 478 "radar", CTLTYPE_INT | CTLFLAG_RW, vap->iv_ic, 0, 479 ieee80211_sysctl_radar, "I", "simulate radar event"); 480 } 481 vap->iv_sysctl = ctx; 482 vap->iv_oid = oid; 483 } 484 485 void 486 ieee80211_sysctl_vdetach(struct ieee80211vap *vap) 487 { 488 489 if (vap->iv_sysctl != NULL) { 490 sysctl_ctx_free(vap->iv_sysctl); 491 kfree(vap->iv_sysctl, M_DEVBUF); 492 vap->iv_sysctl = NULL; 493 } 494 } 495 496 int 497 ieee80211_node_dectestref(struct ieee80211_node *ni) 498 { 499 /* XXX need equivalent of atomic_dec_and_test */ 500 atomic_subtract_int(&ni->ni_refcnt, 1); 501 return atomic_cmpset_int(&ni->ni_refcnt, 0, 1); 502 } 503 504 #if 0 505 /* XXX this breaks ALTQ's packet scheduler */ 506 void 507 ieee80211_flush_ifq(struct ifaltq *ifq, struct ieee80211vap *vap) 508 { 509 struct ieee80211_node *ni; 510 struct mbuf *m, **mprev; 511 struct ifaltq_subque *ifsq = ifq_get_subq_default(ifq); 512 513 wlan_assert_serialized(); 514 515 ALTQ_SQ_LOCK(ifsq); 516 517 /* 518 * Fix normal queue 519 */ 520 mprev = &ifsq->ifsq_norm_head; 521 while ((m = *mprev) != NULL) { 522 ni = (struct ieee80211_node *)m->m_pkthdr.rcvif; 523 if (ni != NULL && ni->ni_vap == vap) { 524 *mprev = m->m_nextpkt; /* remove from list */ 525 ALTQ_SQ_CNTR_DEC(ifsq, m->m_pkthdr.len); 526 527 m_freem(m); 528 ieee80211_free_node(ni); /* reclaim ref */ 529 } else 530 mprev = &m->m_nextpkt; 531 } 532 /* recalculate tail ptr */ 533 m = ifsq->ifsq_norm_head; 534 for (; m != NULL && m->m_nextpkt != NULL; m = m->m_nextpkt) 535 ; 536 ifsq->ifsq_norm_tail = m; 537 538 /* 539 * Fix priority queue 540 */ 541 mprev = &ifsq->ifsq_prio_head; 542 while ((m = *mprev) != NULL) { 543 ni = (struct ieee80211_node *)m->m_pkthdr.rcvif; 544 if (ni != NULL && ni->ni_vap == vap) { 545 *mprev = m->m_nextpkt; /* remove from list */ 546 ALTQ_SQ_CNTR_DEC(ifsq, m->m_pkthdr.len); 547 ALTQ_SQ_PRIO_CNTR_DEC(ifsq, m->m_pkthdr.len); 548 549 m_freem(m); 550 ieee80211_free_node(ni); /* reclaim ref */ 551 } else 552 mprev = &m->m_nextpkt; 553 } 554 /* recalculate tail ptr */ 555 m = ifsq->ifsq_prio_head; 556 for (; m != NULL && m->m_nextpkt != NULL; m = m->m_nextpkt) 557 ; 558 ifsq->ifsq_prio_tail = m; 559 560 ALTQ_SQ_UNLOCK(ifsq); 561 } 562 #endif 563 564 /* 565 * As above, for mbufs allocated with m_gethdr/MGETHDR 566 * or initialized by M_COPY_PKTHDR. 567 */ 568 #define MC_ALIGN(m, len) \ 569 do { \ 570 (m)->m_data += rounddown2(MCLBYTES - (len), sizeof(long)); \ 571 } while (/* CONSTCOND */ 0) 572 573 /* 574 * Allocate and setup a management frame of the specified 575 * size. We return the mbuf and a pointer to the start 576 * of the contiguous data area that's been reserved based 577 * on the packet length. The data area is forced to 32-bit 578 * alignment and the buffer length to a multiple of 4 bytes. 579 * This is done mainly so beacon frames (that require this) 580 * can use this interface too. 581 */ 582 struct mbuf * 583 ieee80211_getmgtframe(uint8_t **frm, int headroom, int pktlen) 584 { 585 struct mbuf *m; 586 u_int len; 587 588 /* 589 * NB: we know the mbuf routines will align the data area 590 * so we don't need to do anything special. 591 */ 592 len = roundup2(headroom + pktlen, 4); 593 KASSERT(len <= MCLBYTES, ("802.11 mgt frame too large: %u", len)); 594 if (len < MINCLSIZE) { 595 m = m_gethdr(M_NOWAIT, MT_DATA); 596 /* 597 * Align the data in case additional headers are added. 598 * This should only happen when a WEP header is added 599 * which only happens for shared key authentication mgt 600 * frames which all fit in MHLEN. 601 */ 602 if (m != NULL) 603 MH_ALIGN(m, len); 604 } else { 605 m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR); 606 if (m != NULL) 607 MC_ALIGN(m, len); 608 } 609 if (m != NULL) { 610 m->m_data += headroom; 611 *frm = m->m_data; 612 } 613 return m; 614 } 615 616 /* 617 * Re-align the payload in the mbuf. This is mainly used (right now) 618 * to handle IP header alignment requirements on certain architectures. 619 */ 620 struct mbuf * 621 ieee80211_realign(struct ieee80211vap *vap, struct mbuf *m, size_t align) 622 { 623 int pktlen, space; 624 struct mbuf *n = NULL; 625 626 pktlen = m->m_pkthdr.len; 627 space = pktlen + align; 628 if (space < MINCLSIZE) { 629 n = m_gethdr(M_NOWAIT, MT_DATA); 630 } else { 631 if (space <= MCLBYTES) 632 space = MCLBYTES; 633 else if (space <= MJUMPAGESIZE) 634 space = MJUMPAGESIZE; 635 else if (space <= MJUM9BYTES) 636 space = MJUM9BYTES; 637 else 638 space = MJUM16BYTES; 639 n = m_getjcl(M_NOWAIT, MT_DATA, M_PKTHDR, space); 640 } 641 if (__predict_true(n != NULL)) { 642 m_move_pkthdr(n, m); 643 n->m_data = (caddr_t)(ALIGN(n->m_data + align) - align); 644 m_copydata(m, 0, pktlen, mtod(n, caddr_t)); 645 n->m_len = pktlen; 646 } else { 647 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 648 mtod(m, const struct ieee80211_frame *), NULL, 649 "%s", "no mbuf to realign"); 650 vap->iv_stats.is_rx_badalign++; 651 } 652 m_freem(m); 653 return n; 654 } 655 656 int 657 ieee80211_add_callback(struct mbuf *m, 658 void (*func)(struct ieee80211_node *, void *, int), void *arg) 659 { 660 struct m_tag *mtag; 661 struct ieee80211_cb *cb; 662 663 mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_CALLBACK, 664 sizeof(struct ieee80211_cb), M_INTWAIT); 665 if (mtag == NULL) 666 return 0; 667 668 cb = (struct ieee80211_cb *)(mtag+1); 669 cb->func = func; 670 cb->arg = arg; 671 m_tag_prepend(m, mtag); 672 m->m_flags |= M_TXCB; 673 return 1; 674 } 675 676 int 677 ieee80211_add_xmit_params(struct mbuf *m, 678 const struct ieee80211_bpf_params *params) 679 { 680 struct m_tag *mtag; 681 struct ieee80211_tx_params *tx; 682 683 mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_XMIT_PARAMS, 684 sizeof(struct ieee80211_tx_params), M_NOWAIT); 685 if (mtag == NULL) 686 return (0); 687 688 tx = (struct ieee80211_tx_params *)(mtag+1); 689 memcpy(&tx->params, params, sizeof(struct ieee80211_bpf_params)); 690 m_tag_prepend(m, mtag); 691 return (1); 692 } 693 694 int 695 ieee80211_get_xmit_params(struct mbuf *m, 696 struct ieee80211_bpf_params *params) 697 { 698 struct m_tag *mtag; 699 struct ieee80211_tx_params *tx; 700 701 mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_XMIT_PARAMS, 702 NULL); 703 if (mtag == NULL) 704 return (-1); 705 tx = (struct ieee80211_tx_params *)(mtag + 1); 706 memcpy(params, &tx->params, sizeof(struct ieee80211_bpf_params)); 707 return (0); 708 } 709 710 void 711 ieee80211_process_callback(struct ieee80211_node *ni, 712 struct mbuf *m, int status) 713 { 714 struct m_tag *mtag; 715 716 mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_CALLBACK, NULL); 717 if (mtag != NULL) { 718 struct ieee80211_cb *cb = (struct ieee80211_cb *)(mtag+1); 719 cb->func(ni, cb->arg, status); 720 } 721 } 722 723 #include <sys/libkern.h> 724 725 void 726 get_random_bytes(void *p, size_t n) 727 { 728 uint8_t *dp = p; 729 730 while (n > 0) { 731 uint32_t v = karc4random(); 732 size_t nb = n > sizeof(uint32_t) ? sizeof(uint32_t) : n; 733 bcopy(&v, dp, n > sizeof(uint32_t) ? sizeof(uint32_t) : n); 734 dp += sizeof(uint32_t), n -= nb; 735 } 736 } 737 738 /* 739 * Helper function for events that pass just a single mac address. 740 */ 741 static void 742 notify_macaddr(struct ifnet *ifp, int op, const uint8_t mac[IEEE80211_ADDR_LEN]) 743 { 744 struct ieee80211_join_event iev; 745 746 memset(&iev, 0, sizeof(iev)); 747 IEEE80211_ADDR_COPY(iev.iev_addr, mac); 748 rt_ieee80211msg(ifp, op, &iev, sizeof(iev)); 749 } 750 751 void 752 ieee80211_notify_node_join(struct ieee80211_node *ni, int newassoc) 753 { 754 struct ieee80211vap *vap = ni->ni_vap; 755 struct ifnet *ifp = vap->iv_ifp; 756 757 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode join", 758 (ni == vap->iv_bss) ? "bss " : ""); 759 760 if (ni == vap->iv_bss) { 761 ifp->if_link_state = LINK_STATE_UP; 762 notify_macaddr(ifp, newassoc ? 763 RTM_IEEE80211_ASSOC : RTM_IEEE80211_REASSOC, ni->ni_bssid); 764 if_link_state_change(ifp); 765 } else { 766 notify_macaddr(ifp, newassoc ? 767 RTM_IEEE80211_JOIN : RTM_IEEE80211_REJOIN, ni->ni_macaddr); 768 } 769 } 770 771 void 772 ieee80211_notify_node_leave(struct ieee80211_node *ni) 773 { 774 struct ieee80211vap *vap = ni->ni_vap; 775 struct ifnet *ifp = vap->iv_ifp; 776 777 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode leave", 778 (ni == vap->iv_bss) ? "bss " : ""); 779 780 if (ni == vap->iv_bss) { 781 ifp->if_link_state = LINK_STATE_DOWN; 782 rt_ieee80211msg(ifp, RTM_IEEE80211_DISASSOC, NULL, 0); 783 if_link_state_change(ifp); 784 } else { 785 /* fire off wireless event station leaving */ 786 notify_macaddr(ifp, RTM_IEEE80211_LEAVE, ni->ni_macaddr); 787 } 788 } 789 790 void 791 ieee80211_notify_scan_done(struct ieee80211vap *vap) 792 { 793 struct ifnet *ifp = vap->iv_ifp; 794 795 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, "%s\n", "notify scan done"); 796 797 /* dispatch wireless event indicating scan completed */ 798 rt_ieee80211msg(ifp, RTM_IEEE80211_SCAN, NULL, 0); 799 } 800 801 void 802 ieee80211_notify_replay_failure(struct ieee80211vap *vap, 803 const struct ieee80211_frame *wh, const struct ieee80211_key *k, 804 u_int64_t rsc, int tid) 805 { 806 struct ifnet *ifp = vap->iv_ifp; 807 808 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2, 809 "%s replay detected <rsc %ju, csc %ju, keyix %u rxkeyix %u>", 810 k->wk_cipher->ic_name, (intmax_t) rsc, 811 (intmax_t) k->wk_keyrsc[tid], 812 k->wk_keyix, k->wk_rxkeyix); 813 814 if (ifp != NULL) { /* NB: for cipher test modules */ 815 struct ieee80211_replay_event iev; 816 817 IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1); 818 IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2); 819 iev.iev_cipher = k->wk_cipher->ic_cipher; 820 if (k->wk_rxkeyix != IEEE80211_KEYIX_NONE) 821 iev.iev_keyix = k->wk_rxkeyix; 822 else 823 iev.iev_keyix = k->wk_keyix; 824 iev.iev_keyrsc = k->wk_keyrsc[tid]; 825 iev.iev_rsc = rsc; 826 rt_ieee80211msg(ifp, RTM_IEEE80211_REPLAY, &iev, sizeof(iev)); 827 } 828 } 829 830 void 831 ieee80211_notify_michael_failure(struct ieee80211vap *vap, 832 const struct ieee80211_frame *wh, u_int keyix) 833 { 834 struct ifnet *ifp = vap->iv_ifp; 835 836 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2, 837 "michael MIC verification failed <keyix %u>", keyix); 838 vap->iv_stats.is_rx_tkipmic++; 839 840 if (ifp != NULL) { /* NB: for cipher test modules */ 841 struct ieee80211_michael_event iev; 842 843 IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1); 844 IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2); 845 iev.iev_cipher = IEEE80211_CIPHER_TKIP; 846 iev.iev_keyix = keyix; 847 rt_ieee80211msg(ifp, RTM_IEEE80211_MICHAEL, &iev, sizeof(iev)); 848 } 849 } 850 851 void 852 ieee80211_notify_wds_discover(struct ieee80211_node *ni) 853 { 854 struct ieee80211vap *vap = ni->ni_vap; 855 struct ifnet *ifp = vap->iv_ifp; 856 857 notify_macaddr(ifp, RTM_IEEE80211_WDS, ni->ni_macaddr); 858 } 859 860 void 861 ieee80211_notify_csa(struct ieee80211com *ic, 862 const struct ieee80211_channel *c, int mode, int count) 863 { 864 struct ieee80211vap *vap; 865 struct ifnet *ifp; 866 struct ieee80211_csa_event iev; 867 868 memset(&iev, 0, sizeof(iev)); 869 iev.iev_flags = c->ic_flags; 870 iev.iev_freq = c->ic_freq; 871 iev.iev_ieee = c->ic_ieee; 872 iev.iev_mode = mode; 873 iev.iev_count = count; 874 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 875 ifp = vap->iv_ifp; 876 rt_ieee80211msg(ifp, RTM_IEEE80211_CSA, &iev, sizeof(iev)); 877 } 878 } 879 880 void 881 ieee80211_notify_radar(struct ieee80211com *ic, 882 const struct ieee80211_channel *c) 883 { 884 struct ieee80211_radar_event iev; 885 struct ieee80211vap *vap; 886 struct ifnet *ifp; 887 888 memset(&iev, 0, sizeof(iev)); 889 iev.iev_flags = c->ic_flags; 890 iev.iev_freq = c->ic_freq; 891 iev.iev_ieee = c->ic_ieee; 892 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 893 ifp = vap->iv_ifp; 894 rt_ieee80211msg(ifp, RTM_IEEE80211_RADAR, &iev, sizeof(iev)); 895 } 896 } 897 898 void 899 ieee80211_notify_cac(struct ieee80211com *ic, 900 const struct ieee80211_channel *c, enum ieee80211_notify_cac_event type) 901 { 902 struct ieee80211_cac_event iev; 903 struct ieee80211vap *vap; 904 struct ifnet *ifp; 905 906 memset(&iev, 0, sizeof(iev)); 907 iev.iev_flags = c->ic_flags; 908 iev.iev_freq = c->ic_freq; 909 iev.iev_ieee = c->ic_ieee; 910 iev.iev_type = type; 911 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 912 ifp = vap->iv_ifp; 913 rt_ieee80211msg(ifp, RTM_IEEE80211_CAC, &iev, sizeof(iev)); 914 } 915 } 916 917 void 918 ieee80211_notify_node_deauth(struct ieee80211_node *ni) 919 { 920 struct ieee80211vap *vap = ni->ni_vap; 921 struct ifnet *ifp = vap->iv_ifp; 922 923 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node deauth"); 924 925 notify_macaddr(ifp, RTM_IEEE80211_DEAUTH, ni->ni_macaddr); 926 } 927 928 void 929 ieee80211_notify_node_auth(struct ieee80211_node *ni) 930 { 931 struct ieee80211vap *vap = ni->ni_vap; 932 struct ifnet *ifp = vap->iv_ifp; 933 934 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node auth"); 935 936 notify_macaddr(ifp, RTM_IEEE80211_AUTH, ni->ni_macaddr); 937 } 938 939 void 940 ieee80211_notify_country(struct ieee80211vap *vap, 941 const uint8_t bssid[IEEE80211_ADDR_LEN], const uint8_t cc[2]) 942 { 943 struct ifnet *ifp = vap->iv_ifp; 944 struct ieee80211_country_event iev; 945 946 memset(&iev, 0, sizeof(iev)); 947 IEEE80211_ADDR_COPY(iev.iev_addr, bssid); 948 iev.iev_cc[0] = cc[0]; 949 iev.iev_cc[1] = cc[1]; 950 rt_ieee80211msg(ifp, RTM_IEEE80211_COUNTRY, &iev, sizeof(iev)); 951 } 952 953 void 954 ieee80211_notify_radio(struct ieee80211com *ic, int state) 955 { 956 struct ieee80211_radio_event iev; 957 struct ieee80211vap *vap; 958 struct ifnet *ifp; 959 960 memset(&iev, 0, sizeof(iev)); 961 iev.iev_state = state; 962 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 963 ifp = vap->iv_ifp; 964 rt_ieee80211msg(ifp, RTM_IEEE80211_RADIO, &iev, sizeof(iev)); 965 } 966 } 967 968 /* IEEE Std 802.11a-1999, page 9, table 79 */ 969 #define IEEE80211_OFDM_SYM_TIME 4 970 #define IEEE80211_OFDM_PREAMBLE_TIME 16 971 #define IEEE80211_OFDM_SIGNAL_TIME 4 972 /* IEEE Std 802.11g-2003, page 44 */ 973 #define IEEE80211_OFDM_SIGNAL_EXT_TIME 6 974 975 /* IEEE Std 802.11a-1999, page 7, figure 107 */ 976 #define IEEE80211_OFDM_PLCP_SERVICE_NBITS 16 977 #define IEEE80211_OFDM_TAIL_NBITS 6 978 979 #define IEEE80211_OFDM_NBITS(frmlen) \ 980 (IEEE80211_OFDM_PLCP_SERVICE_NBITS + \ 981 ((frmlen) * NBBY) + \ 982 IEEE80211_OFDM_TAIL_NBITS) 983 984 #define IEEE80211_OFDM_NBITS_PER_SYM(kbps) \ 985 (((kbps) * IEEE80211_OFDM_SYM_TIME) / 1000) 986 987 #define IEEE80211_OFDM_NSYMS(kbps, frmlen) \ 988 howmany(IEEE80211_OFDM_NBITS((frmlen)), \ 989 IEEE80211_OFDM_NBITS_PER_SYM((kbps))) 990 991 #define IEEE80211_OFDM_TXTIME(kbps, frmlen) \ 992 (IEEE80211_OFDM_PREAMBLE_TIME + \ 993 IEEE80211_OFDM_SIGNAL_TIME + \ 994 (IEEE80211_OFDM_NSYMS((kbps), (frmlen)) * IEEE80211_OFDM_SYM_TIME)) 995 996 /* IEEE Std 802.11b-1999, page 28, subclause 18.3.4 */ 997 #define IEEE80211_CCK_PREAMBLE_LEN 144 998 #define IEEE80211_CCK_PLCP_HDR_TIME 48 999 #define IEEE80211_CCK_SHPREAMBLE_LEN 72 1000 #define IEEE80211_CCK_SHPLCP_HDR_TIME 24 1001 1002 #define IEEE80211_CCK_NBITS(frmlen) ((frmlen) * NBBY) 1003 #define IEEE80211_CCK_TXTIME(kbps, frmlen) \ 1004 (((IEEE80211_CCK_NBITS((frmlen)) * 1000) + (kbps) - 1) / (kbps)) 1005 1006 uint16_t 1007 ieee80211_txtime(struct ieee80211_node *ni, u_int len, uint8_t rs_rate, 1008 uint32_t flags) 1009 { 1010 struct ieee80211vap *vap = ni->ni_vap; 1011 uint16_t txtime; 1012 int rate; 1013 1014 rs_rate &= IEEE80211_RATE_VAL; 1015 rate = rs_rate * 500; /* ieee80211 rate -> kbps */ 1016 1017 if (vap->iv_ic->ic_phytype == IEEE80211_T_OFDM) { 1018 /* 1019 * IEEE Std 802.11a-1999, page 37, equation (29) 1020 * IEEE Std 802.11g-2003, page 44, equation (42) 1021 */ 1022 txtime = IEEE80211_OFDM_TXTIME(rate, len); 1023 if (vap->iv_ic->ic_curmode == IEEE80211_MODE_11G) 1024 txtime += IEEE80211_OFDM_SIGNAL_EXT_TIME; 1025 } else { 1026 /* 1027 * IEEE Std 802.11b-1999, page 28, subclause 18.3.4 1028 * IEEE Std 802.11g-2003, page 45, equation (43) 1029 */ 1030 if (vap->iv_ic->ic_phytype == IEEE80211_T_OFDM_QUARTER+1) 1031 ++len; 1032 txtime = IEEE80211_CCK_TXTIME(rate, len); 1033 1034 /* 1035 * Short preamble is not applicable for DS 1Mbits/s 1036 */ 1037 if (rs_rate != 2 && (flags & IEEE80211_F_SHPREAMBLE)) { 1038 txtime += IEEE80211_CCK_SHPREAMBLE_LEN + 1039 IEEE80211_CCK_SHPLCP_HDR_TIME; 1040 } else { 1041 txtime += IEEE80211_CCK_PREAMBLE_LEN + 1042 IEEE80211_CCK_PLCP_HDR_TIME; 1043 } 1044 } 1045 return txtime; 1046 } 1047 1048 void 1049 ieee80211_load_module(const char *modname) 1050 { 1051 1052 #ifdef notyet 1053 (void)kern_kldload(curthread, modname, NULL); 1054 #else 1055 kprintf("%s: load the %s module by hand for now.\n", __func__, modname); 1056 #endif 1057 } 1058 1059 static eventhandler_tag wlan_bpfevent; 1060 static eventhandler_tag wlan_ifllevent; 1061 1062 static void 1063 bpf_track_event(void *arg, struct ifnet *ifp, int dlt, int attach) 1064 { 1065 /* NB: identify vap's by if_start */ 1066 1067 if (dlt == DLT_IEEE802_11_RADIO && 1068 ifp->if_start == ieee80211_vap_start) { 1069 struct ieee80211vap *vap = ifp->if_softc; 1070 /* 1071 * Track bpf radiotap listener state. We mark the vap 1072 * to indicate if any listener is present and the com 1073 * to indicate if any listener exists on any associated 1074 * vap. This flag is used by drivers to prepare radiotap 1075 * state only when needed. 1076 */ 1077 if (attach) { 1078 ieee80211_syncflag_ext(vap, IEEE80211_FEXT_BPF); 1079 if (vap->iv_opmode == IEEE80211_M_MONITOR) 1080 atomic_add_int(&vap->iv_ic->ic_montaps, 1); 1081 } else if (!vap->iv_rawbpf) { 1082 ieee80211_syncflag_ext(vap, -IEEE80211_FEXT_BPF); 1083 if (vap->iv_opmode == IEEE80211_M_MONITOR) 1084 atomic_subtract_int(&vap->iv_ic->ic_montaps, 1); 1085 } 1086 } 1087 } 1088 1089 const char * 1090 ether_sprintf(const u_char *buf) 1091 { 1092 static char ethstr[MAXCPU][ETHER_ADDRSTRLEN + 1]; 1093 char *ptr = ethstr[mycpu->gd_cpuid]; 1094 1095 kether_ntoa(buf, ptr); 1096 return (ptr); 1097 } 1098 1099 /* 1100 * Change MAC address on the vap (if was not started). 1101 */ 1102 static void 1103 wlan_iflladdr_event(void *arg __unused, struct ifnet *ifp) 1104 { 1105 /* NB: identify vap's by if_init */ 1106 if (ifp->if_init == ieee80211_init && 1107 (ifp->if_flags & IFF_UP) == 0) { 1108 struct ieee80211vap *vap = ifp->if_softc; 1109 IEEE80211_ADDR_COPY(vap->iv_myaddr, IF_LLADDR(ifp)); 1110 } 1111 } 1112 1113 /* 1114 * Module glue. 1115 * 1116 * NB: the module name is "wlan" for compatibility with NetBSD. 1117 */ 1118 static int 1119 wlan_modevent(module_t mod, int type, void *unused) 1120 { 1121 int error; 1122 1123 switch (type) { 1124 case MOD_LOAD: 1125 if (bootverbose) 1126 kprintf("wlan: <802.11 Link Layer>\n"); 1127 wlan_bpfevent = EVENTHANDLER_REGISTER(bpf_track, 1128 bpf_track_event, 0, 1129 EVENTHANDLER_PRI_ANY); 1130 wlan_ifllevent = EVENTHANDLER_REGISTER(iflladdr_event, 1131 wlan_iflladdr_event, NULL, 1132 EVENTHANDLER_PRI_ANY); 1133 if_clone_attach(&wlan_cloner); 1134 error = 0; 1135 break; 1136 case MOD_UNLOAD: 1137 if_clone_detach(&wlan_cloner); 1138 EVENTHANDLER_DEREGISTER(bpf_track, wlan_bpfevent); 1139 EVENTHANDLER_DEREGISTER(iflladdr_event, wlan_ifllevent); 1140 error = 0; 1141 break; 1142 default: 1143 error = EINVAL; 1144 break; 1145 } 1146 return error; 1147 } 1148 1149 static moduledata_t wlan_mod = { 1150 "wlan", 1151 wlan_modevent, 1152 0 1153 }; 1154 DECLARE_MODULE(wlan, wlan_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST); 1155 MODULE_VERSION(wlan, 1); 1156 MODULE_DEPEND(wlan, ether, 1, 1, 1); 1157