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 static int wlan_clone_destroy(struct ifnet *); 70 static int wlan_clone_create(struct if_clone *, int, caddr_t); 71 72 static struct if_clone wlan_cloner = 73 IF_CLONE_INITIALIZER("wlan", wlan_clone_create, wlan_clone_destroy, 74 0, IF_MAXUNIT); 75 76 struct lwkt_serialize wlan_global_serializer = LWKT_SERIALIZE_INITIALIZER; 77 78 static int 79 wlan_clone_create(struct if_clone *ifc, int unit, caddr_t params) 80 { 81 struct ieee80211_clone_params cp; 82 struct ieee80211vap *vap; 83 struct ieee80211com *ic; 84 int error; 85 86 error = copyin(params, &cp, sizeof(cp)); 87 if (error) 88 return error; 89 90 ic = ieee80211_find_com(cp.icp_parent); 91 if (ic == NULL) 92 return ENXIO; 93 if (cp.icp_opmode >= IEEE80211_OPMODE_MAX) { 94 ic_printf(ic, "%s: invalid opmode %d\n", __func__, 95 cp.icp_opmode); 96 return EINVAL; 97 } 98 if ((ic->ic_caps & ieee80211_opcap[cp.icp_opmode]) == 0) { 99 ic_printf(ic, "%s mode not supported\n", 100 ieee80211_opmode_name[cp.icp_opmode]); 101 return EOPNOTSUPP; 102 } 103 if ((cp.icp_flags & IEEE80211_CLONE_TDMA) && 104 #ifdef IEEE80211_SUPPORT_TDMA 105 (ic->ic_caps & IEEE80211_C_TDMA) == 0 106 #else 107 (1) 108 #endif 109 ) { 110 ic_printf(ic, "TDMA not supported\n"); 111 return EOPNOTSUPP; 112 } 113 vap = ic->ic_vap_create(ic, ifc->ifc_name, unit, 114 cp.icp_opmode, cp.icp_flags, cp.icp_bssid, 115 cp.icp_flags & IEEE80211_CLONE_MACADDR ? 116 cp.icp_macaddr : ic->ic_macaddr); 117 118 119 return (vap == NULL ? EIO : 0); 120 } 121 122 static int 123 wlan_clone_destroy(struct ifnet *ifp) 124 { 125 struct ieee80211vap *vap = ifp->if_softc; 126 struct ieee80211com *ic = vap->iv_ic; 127 128 ic->ic_vap_delete(vap); 129 130 return 0; 131 } 132 133 const char *wlan_last_enter_func; 134 const char *wlan_last_exit_func; 135 136 /* 137 * These serializer functions are used by wlan and all drivers. 138 * They are not recursive. The serializer must be held on 139 * any OACTIVE interactions. Dragonfly automatically holds 140 * the serializer on most ifp->if_*() calls but calls made 141 * from wlan into ath might not. 142 */ 143 void 144 _wlan_serialize_enter(const char *funcname) 145 { 146 lwkt_serialize_enter(&wlan_global_serializer); 147 wlan_last_enter_func = funcname; 148 } 149 150 void 151 _wlan_serialize_exit(const char *funcname) 152 { 153 lwkt_serialize_exit(&wlan_global_serializer); 154 wlan_last_exit_func = funcname; 155 } 156 157 int 158 _wlan_is_serialized(void) 159 { 160 return (IS_SERIALIZED(&wlan_global_serializer)); 161 } 162 163 /* 164 * Push/pop allows the wlan serializer to be entered recursively. 165 */ 166 int 167 _wlan_serialize_push(const char *funcname) 168 { 169 if (IS_SERIALIZED(&wlan_global_serializer)) { 170 return 0; 171 } else { 172 _wlan_serialize_enter(funcname); 173 return 1; 174 } 175 } 176 177 void 178 _wlan_serialize_pop(const char *funcname, int wst) 179 { 180 if (wst) { 181 _wlan_serialize_exit(funcname); 182 } 183 } 184 185 #if 0 186 187 int 188 wlan_serialize_sleep(void *ident, int flags, const char *wmesg, int timo) 189 { 190 return(zsleep(ident, &wlan_global_serializer, flags, wmesg, timo)); 191 } 192 193 /* 194 * condition-var functions which interlock the ic lock (which is now 195 * just wlan_global_serializer) 196 */ 197 void 198 wlan_cv_init(struct cv *cv, const char *desc) 199 { 200 cv->cv_desc = desc; 201 cv->cv_waiters = 0; 202 } 203 204 int 205 wlan_cv_timedwait(struct cv *cv, int ticks) 206 { 207 int error; 208 209 ++cv->cv_waiters; 210 error = wlan_serialize_sleep(cv, 0, cv->cv_desc, ticks); 211 return (error); 212 } 213 214 void 215 wlan_cv_wait(struct cv *cv) 216 { 217 ++cv->cv_waiters; 218 wlan_serialize_sleep(cv, 0, cv->cv_desc, 0); 219 } 220 221 void 222 wlan_cv_signal(struct cv *cv, int broadcast) 223 { 224 if (cv->cv_waiters) { 225 if (broadcast) { 226 cv->cv_waiters = 0; 227 wakeup(cv); 228 } else { 229 --cv->cv_waiters; 230 wakeup_one(cv); 231 } 232 } 233 } 234 235 #endif 236 237 /* 238 * Add RX parameters to the given mbuf. 239 * 240 * Returns 1 if OK, 0 on error. 241 */ 242 int 243 ieee80211_add_rx_params(struct mbuf *m, const struct ieee80211_rx_stats *rxs) 244 { 245 struct m_tag *mtag; 246 struct ieee80211_rx_params *rx; 247 248 mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_RECV_PARAMS, 249 sizeof(struct ieee80211_rx_stats), M_NOWAIT); 250 if (mtag == NULL) 251 return (0); 252 253 rx = (struct ieee80211_rx_params *)(mtag + 1); 254 memcpy(&rx->params, rxs, sizeof(*rxs)); 255 m_tag_prepend(m, mtag); 256 return (1); 257 } 258 259 int 260 ieee80211_get_rx_params(struct mbuf *m, struct ieee80211_rx_stats *rxs) 261 { 262 struct m_tag *mtag; 263 struct ieee80211_rx_params *rx; 264 265 mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_RECV_PARAMS, 266 NULL); 267 if (mtag == NULL) 268 return (-1); 269 rx = (struct ieee80211_rx_params *)(mtag + 1); 270 memcpy(rxs, &rx->params, sizeof(*rxs)); 271 return (0); 272 } 273 274 /* 275 * Misc 276 */ 277 int 278 ieee80211_vap_xmitpkt(struct ieee80211vap *vap, struct mbuf *m) 279 { 280 struct ifnet *ifp = vap->iv_ifp; 281 struct ifaltq_subque *ifsq = ifq_get_subq_default(&ifp->if_snd); 282 int error; 283 int wst; 284 285 /* 286 * When transmitting via the VAP, we shouldn't hold 287 * any IC TX lock as the VAP TX path will acquire it. 288 */ 289 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 290 291 error = ifsq_enqueue(ifsq, m, NULL); 292 wst = wlan_serialize_push(); 293 ifp->if_start(ifp, ifsq); 294 wlan_serialize_pop(wst); 295 296 return error; 297 } 298 299 int 300 ieee80211_parent_xmitpkt(struct ieee80211com *ic, struct mbuf *m) 301 { 302 int error; 303 304 /* 305 * Assert the IC TX lock is held - this enforces the 306 * processing -> queuing order is maintained 307 */ 308 IEEE80211_TX_LOCK_ASSERT(ic); 309 error = ic->ic_transmit(ic, m); 310 if (error) { 311 struct ieee80211_node *ni; 312 313 ni = (struct ieee80211_node *)m->m_pkthdr.rcvif; 314 315 /* XXX number of fragments */ 316 IFNET_STAT_INC(ni->ni_vap->iv_ifp, oerrors, 1); 317 ieee80211_free_node(ni); 318 ieee80211_free_mbuf(m); 319 } 320 return (error); 321 } 322 323 void 324 ieee80211_vap_destroy(struct ieee80211vap *vap) 325 { 326 /* 327 * WLAN serializer must _not_ be held for if_clone_destroy(), 328 * since it could dead-lock the domsg to netisrs. 329 */ 330 wlan_serialize_exit(); 331 /* 332 * Make sure we con't end up in an infinite loop in ieee80211_ifdetach 333 * when if_clone_destroy fails. 334 */ 335 KKASSERT(if_clone_destroy(vap->iv_ifp->if_xname) == 0); 336 wlan_serialize_enter(); 337 } 338 339 /* 340 * NOTE: This handler is used generally to convert milliseconds 341 * to ticks for various simple sysctl variables and does not 342 * need to be serialized. 343 */ 344 int 345 ieee80211_sysctl_msecs_ticks(SYSCTL_HANDLER_ARGS) 346 { 347 int msecs = ticks_to_msecs(*(int *)arg1); 348 int error, t; 349 350 error = sysctl_handle_int(oidp, &msecs, 0, req); 351 if (error == 0 && req->newptr) { 352 t = msecs_to_ticks(msecs); 353 *(int *)arg1 = (t < 1) ? 1 : t; 354 } 355 356 return error; 357 } 358 359 static int 360 ieee80211_sysctl_inact(SYSCTL_HANDLER_ARGS) 361 { 362 int inact = (*(int *)arg1) * IEEE80211_INACT_WAIT; 363 int error; 364 365 error = sysctl_handle_int(oidp, &inact, 0, req); 366 if (error == 0 && req->newptr) 367 *(int *)arg1 = inact / IEEE80211_INACT_WAIT; 368 369 return error; 370 } 371 372 static int 373 ieee80211_sysctl_parent(SYSCTL_HANDLER_ARGS) 374 { 375 struct ieee80211com *ic = arg1; 376 const char *name = ic->ic_name; 377 378 return SYSCTL_OUT(req, name, strlen(name)); 379 } 380 381 static int 382 ieee80211_sysctl_radar(SYSCTL_HANDLER_ARGS) 383 { 384 struct ieee80211com *ic = arg1; 385 int t = 0, error; 386 387 error = sysctl_handle_int(oidp, &t, 0, req); 388 if (error == 0 && req->newptr) 389 ieee80211_dfs_notify_radar(ic, ic->ic_curchan); 390 391 return error; 392 } 393 394 void 395 ieee80211_sysctl_attach(struct ieee80211com *ic) 396 { 397 } 398 399 void 400 ieee80211_sysctl_detach(struct ieee80211com *ic) 401 { 402 } 403 404 void 405 ieee80211_sysctl_vattach(struct ieee80211vap *vap) 406 { 407 struct ifnet *ifp = vap->iv_ifp; 408 struct sysctl_ctx_list *ctx; 409 struct sysctl_oid *oid; 410 char num[14]; /* sufficient for 32 bits */ 411 412 ctx = (struct sysctl_ctx_list *) kmalloc(sizeof(struct sysctl_ctx_list), 413 M_DEVBUF, M_INTWAIT | M_ZERO); 414 if (ctx == NULL) { 415 if_printf(ifp, "%s: cannot allocate sysctl context!\n", 416 __func__); 417 return; 418 } 419 sysctl_ctx_init(ctx); 420 ksnprintf(num, sizeof(num), "%u", ifp->if_dunit); 421 oid = SYSCTL_ADD_NODE(ctx, &SYSCTL_NODE_CHILDREN(_net, wlan), 422 OID_AUTO, num, CTLFLAG_RD, NULL, ""); 423 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 424 "%parent", CTLFLAG_RD, vap->iv_ic, 0, 425 ieee80211_sysctl_parent, "A", "parent device"); 426 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 427 "driver_caps", CTLFLAG_RW, &vap->iv_caps, 0, 428 "driver capabilities"); 429 #ifdef IEEE80211_DEBUG 430 vap->iv_debug = ieee80211_debug; 431 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 432 "debug", CTLFLAG_RW, &vap->iv_debug, 0, 433 "control debugging printfs"); 434 #endif 435 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 436 "bmiss_max", CTLFLAG_RW, &vap->iv_bmiss_max, 0, 437 "consecutive beacon misses before scanning"); 438 /* XXX inherit from tunables */ 439 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 440 "inact_run", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_run, 0, 441 ieee80211_sysctl_inact, "I", 442 "station inactivity timeout (sec)"); 443 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 444 "inact_probe", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_probe, 0, 445 ieee80211_sysctl_inact, "I", 446 "station inactivity probe timeout (sec)"); 447 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 448 "inact_auth", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_auth, 0, 449 ieee80211_sysctl_inact, "I", 450 "station authentication timeout (sec)"); 451 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 452 "inact_init", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_init, 0, 453 ieee80211_sysctl_inact, "I", 454 "station initial state timeout (sec)"); 455 if (vap->iv_htcaps & IEEE80211_HTC_HT) { 456 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 457 "ampdu_mintraffic_bk", CTLFLAG_RW, 458 &vap->iv_ampdu_mintraffic[WME_AC_BK], 0, 459 "BK traffic tx aggr threshold (pps)"); 460 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 461 "ampdu_mintraffic_be", CTLFLAG_RW, 462 &vap->iv_ampdu_mintraffic[WME_AC_BE], 0, 463 "BE traffic tx aggr threshold (pps)"); 464 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 465 "ampdu_mintraffic_vo", CTLFLAG_RW, 466 &vap->iv_ampdu_mintraffic[WME_AC_VO], 0, 467 "VO traffic tx aggr threshold (pps)"); 468 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 469 "ampdu_mintraffic_vi", CTLFLAG_RW, 470 &vap->iv_ampdu_mintraffic[WME_AC_VI], 0, 471 "VI traffic tx aggr threshold (pps)"); 472 } 473 if (vap->iv_caps & IEEE80211_C_DFS) { 474 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 475 "radar", CTLTYPE_INT | CTLFLAG_RW, vap->iv_ic, 0, 476 ieee80211_sysctl_radar, "I", "simulate radar event"); 477 } 478 vap->iv_sysctl = ctx; 479 vap->iv_oid = oid; 480 } 481 482 void 483 ieee80211_sysctl_vdetach(struct ieee80211vap *vap) 484 { 485 486 if (vap->iv_sysctl != NULL) { 487 sysctl_ctx_free(vap->iv_sysctl); 488 kfree(vap->iv_sysctl, M_DEVBUF); 489 vap->iv_sysctl = NULL; 490 } 491 } 492 493 int 494 ieee80211_node_dectestref(struct ieee80211_node *ni) 495 { 496 /* XXX need equivalent of atomic_dec_and_test */ 497 atomic_subtract_int(&ni->ni_refcnt, 1); 498 return atomic_cmpset_int(&ni->ni_refcnt, 0, 1); 499 } 500 501 #if 0 502 /* XXX this breaks ALTQ's packet scheduler */ 503 void 504 ieee80211_flush_ifq(struct ifaltq *ifq, struct ieee80211vap *vap) 505 { 506 struct ieee80211_node *ni; 507 struct mbuf *m, **mprev; 508 struct ifaltq_subque *ifsq = ifq_get_subq_default(ifq); 509 510 wlan_assert_serialized(); 511 512 ALTQ_SQ_LOCK(ifsq); 513 514 /* 515 * Fix normal queue 516 */ 517 mprev = &ifsq->ifsq_norm_head; 518 while ((m = *mprev) != NULL) { 519 ni = (struct ieee80211_node *)m->m_pkthdr.rcvif; 520 if (ni != NULL && ni->ni_vap == vap) { 521 *mprev = m->m_nextpkt; /* remove from list */ 522 ALTQ_SQ_CNTR_DEC(ifsq, m->m_pkthdr.len); 523 524 m_freem(m); 525 ieee80211_free_node(ni); /* reclaim ref */ 526 } else 527 mprev = &m->m_nextpkt; 528 } 529 /* recalculate tail ptr */ 530 m = ifsq->ifsq_norm_head; 531 for (; m != NULL && m->m_nextpkt != NULL; m = m->m_nextpkt) 532 ; 533 ifsq->ifsq_norm_tail = m; 534 535 /* 536 * Fix priority queue 537 */ 538 mprev = &ifsq->ifsq_prio_head; 539 while ((m = *mprev) != NULL) { 540 ni = (struct ieee80211_node *)m->m_pkthdr.rcvif; 541 if (ni != NULL && ni->ni_vap == vap) { 542 *mprev = m->m_nextpkt; /* remove from list */ 543 ALTQ_SQ_CNTR_DEC(ifsq, m->m_pkthdr.len); 544 ALTQ_SQ_PRIO_CNTR_DEC(ifsq, m->m_pkthdr.len); 545 546 m_freem(m); 547 ieee80211_free_node(ni); /* reclaim ref */ 548 } else 549 mprev = &m->m_nextpkt; 550 } 551 /* recalculate tail ptr */ 552 m = ifsq->ifsq_prio_head; 553 for (; m != NULL && m->m_nextpkt != NULL; m = m->m_nextpkt) 554 ; 555 ifsq->ifsq_prio_tail = m; 556 557 ALTQ_SQ_UNLOCK(ifsq); 558 } 559 #endif 560 561 /* 562 * As above, for mbufs allocated with m_gethdr/MGETHDR 563 * or initialized by M_COPY_PKTHDR. 564 */ 565 #define MC_ALIGN(m, len) \ 566 do { \ 567 (m)->m_data += rounddown2(MCLBYTES - (len), sizeof(long)); \ 568 } while (/* CONSTCOND */ 0) 569 570 /* 571 * Allocate and setup a management frame of the specified 572 * size. We return the mbuf and a pointer to the start 573 * of the contiguous data area that's been reserved based 574 * on the packet length. The data area is forced to 32-bit 575 * alignment and the buffer length to a multiple of 4 bytes. 576 * This is done mainly so beacon frames (that require this) 577 * can use this interface too. 578 */ 579 struct mbuf * 580 ieee80211_getmgtframe(uint8_t **frm, int headroom, int pktlen) 581 { 582 struct mbuf *m; 583 u_int len; 584 585 /* 586 * NB: we know the mbuf routines will align the data area 587 * so we don't need to do anything special. 588 */ 589 len = roundup2(headroom + pktlen, 4); 590 KASSERT(len <= MCLBYTES, ("802.11 mgt frame too large: %u", len)); 591 if (len < MINCLSIZE) { 592 m = m_gethdr(M_NOWAIT, MT_DATA); 593 /* 594 * Align the data in case additional headers are added. 595 * This should only happen when a WEP header is added 596 * which only happens for shared key authentication mgt 597 * frames which all fit in MHLEN. 598 */ 599 if (m != NULL) 600 MH_ALIGN(m, len); 601 } else { 602 m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR); 603 if (m != NULL) 604 MC_ALIGN(m, len); 605 } 606 if (m != NULL) { 607 m->m_data += headroom; 608 *frm = m->m_data; 609 } 610 return m; 611 } 612 613 /* 614 * Re-align the payload in the mbuf. This is mainly used (right now) 615 * to handle IP header alignment requirements on certain architectures. 616 */ 617 struct mbuf * 618 ieee80211_realign(struct ieee80211vap *vap, struct mbuf *m, size_t align) 619 { 620 int pktlen, space; 621 struct mbuf *n = NULL; 622 623 pktlen = m->m_pkthdr.len; 624 space = pktlen + align; 625 if (space < MINCLSIZE) { 626 n = m_gethdr(M_NOWAIT, MT_DATA); 627 } else { 628 if (space <= MCLBYTES) 629 space = MCLBYTES; 630 else if (space <= MJUMPAGESIZE) 631 space = MJUMPAGESIZE; 632 else if (space <= MJUM9BYTES) 633 space = MJUM9BYTES; 634 else 635 space = MJUM16BYTES; 636 n = m_getjcl(M_NOWAIT, MT_DATA, M_PKTHDR, space); 637 } 638 if (__predict_true(n != NULL)) { 639 m_move_pkthdr(n, m); 640 n->m_data = (caddr_t)(ALIGN(n->m_data + align) - align); 641 m_copydata(m, 0, pktlen, mtod(n, caddr_t)); 642 n->m_len = pktlen; 643 } else { 644 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 645 mtod(m, const struct ieee80211_frame *), NULL, 646 "%s", "no mbuf to realign"); 647 vap->iv_stats.is_rx_badalign++; 648 } 649 m_freem(m); 650 return n; 651 } 652 653 int 654 ieee80211_add_callback(struct mbuf *m, 655 void (*func)(struct ieee80211_node *, void *, int), void *arg) 656 { 657 struct m_tag *mtag; 658 struct ieee80211_cb *cb; 659 660 mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_CALLBACK, 661 sizeof(struct ieee80211_cb), M_INTWAIT); 662 if (mtag == NULL) 663 return 0; 664 665 cb = (struct ieee80211_cb *)(mtag+1); 666 cb->func = func; 667 cb->arg = arg; 668 m_tag_prepend(m, mtag); 669 m->m_flags |= M_TXCB; 670 return 1; 671 } 672 673 int 674 ieee80211_add_xmit_params(struct mbuf *m, 675 const struct ieee80211_bpf_params *params) 676 { 677 struct m_tag *mtag; 678 struct ieee80211_tx_params *tx; 679 680 mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_XMIT_PARAMS, 681 sizeof(struct ieee80211_tx_params), M_NOWAIT); 682 if (mtag == NULL) 683 return (0); 684 685 tx = (struct ieee80211_tx_params *)(mtag+1); 686 memcpy(&tx->params, params, sizeof(struct ieee80211_bpf_params)); 687 m_tag_prepend(m, mtag); 688 return (1); 689 } 690 691 int 692 ieee80211_get_xmit_params(struct mbuf *m, 693 struct ieee80211_bpf_params *params) 694 { 695 struct m_tag *mtag; 696 struct ieee80211_tx_params *tx; 697 698 mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_XMIT_PARAMS, 699 NULL); 700 if (mtag == NULL) 701 return (-1); 702 tx = (struct ieee80211_tx_params *)(mtag + 1); 703 memcpy(params, &tx->params, sizeof(struct ieee80211_bpf_params)); 704 return (0); 705 } 706 707 void 708 ieee80211_process_callback(struct ieee80211_node *ni, 709 struct mbuf *m, int status) 710 { 711 struct m_tag *mtag; 712 713 mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_CALLBACK, NULL); 714 if (mtag != NULL) { 715 struct ieee80211_cb *cb = (struct ieee80211_cb *)(mtag+1); 716 cb->func(ni, cb->arg, status); 717 } 718 } 719 720 #include <sys/libkern.h> 721 722 void 723 get_random_bytes(void *p, size_t n) 724 { 725 uint8_t *dp = p; 726 727 while (n > 0) { 728 uint32_t v = karc4random(); 729 size_t nb = n > sizeof(uint32_t) ? sizeof(uint32_t) : n; 730 bcopy(&v, dp, n > sizeof(uint32_t) ? sizeof(uint32_t) : n); 731 dp += sizeof(uint32_t), n -= nb; 732 } 733 } 734 735 /* 736 * Helper function for events that pass just a single mac address. 737 */ 738 static void 739 notify_macaddr(struct ifnet *ifp, int op, const uint8_t mac[IEEE80211_ADDR_LEN]) 740 { 741 struct ieee80211_join_event iev; 742 743 memset(&iev, 0, sizeof(iev)); 744 IEEE80211_ADDR_COPY(iev.iev_addr, mac); 745 rt_ieee80211msg(ifp, op, &iev, sizeof(iev)); 746 } 747 748 void 749 ieee80211_notify_node_join(struct ieee80211_node *ni, int newassoc) 750 { 751 struct ieee80211vap *vap = ni->ni_vap; 752 struct ifnet *ifp = vap->iv_ifp; 753 754 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode join", 755 (ni == vap->iv_bss) ? "bss " : ""); 756 757 if (ni == vap->iv_bss) { 758 notify_macaddr(ifp, newassoc ? 759 RTM_IEEE80211_ASSOC : RTM_IEEE80211_REASSOC, ni->ni_bssid); 760 if_link_state_change(ifp); 761 } else { 762 notify_macaddr(ifp, newassoc ? 763 RTM_IEEE80211_JOIN : RTM_IEEE80211_REJOIN, ni->ni_macaddr); 764 } 765 } 766 767 void 768 ieee80211_notify_node_leave(struct ieee80211_node *ni) 769 { 770 struct ieee80211vap *vap = ni->ni_vap; 771 struct ifnet *ifp = vap->iv_ifp; 772 773 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode leave", 774 (ni == vap->iv_bss) ? "bss " : ""); 775 776 if (ni == vap->iv_bss) { 777 rt_ieee80211msg(ifp, RTM_IEEE80211_DISASSOC, NULL, 0); 778 if_link_state_change(ifp); 779 } else { 780 /* fire off wireless event station leaving */ 781 notify_macaddr(ifp, RTM_IEEE80211_LEAVE, ni->ni_macaddr); 782 } 783 } 784 785 void 786 ieee80211_notify_scan_done(struct ieee80211vap *vap) 787 { 788 struct ifnet *ifp = vap->iv_ifp; 789 790 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, "%s\n", "notify scan done"); 791 792 /* dispatch wireless event indicating scan completed */ 793 rt_ieee80211msg(ifp, RTM_IEEE80211_SCAN, NULL, 0); 794 } 795 796 void 797 ieee80211_notify_replay_failure(struct ieee80211vap *vap, 798 const struct ieee80211_frame *wh, const struct ieee80211_key *k, 799 u_int64_t rsc, int tid) 800 { 801 struct ifnet *ifp = vap->iv_ifp; 802 803 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2, 804 "%s replay detected <rsc %ju, csc %ju, keyix %u rxkeyix %u>", 805 k->wk_cipher->ic_name, (intmax_t) rsc, 806 (intmax_t) k->wk_keyrsc[tid], 807 k->wk_keyix, k->wk_rxkeyix); 808 809 if (ifp != NULL) { /* NB: for cipher test modules */ 810 struct ieee80211_replay_event iev; 811 812 IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1); 813 IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2); 814 iev.iev_cipher = k->wk_cipher->ic_cipher; 815 if (k->wk_rxkeyix != IEEE80211_KEYIX_NONE) 816 iev.iev_keyix = k->wk_rxkeyix; 817 else 818 iev.iev_keyix = k->wk_keyix; 819 iev.iev_keyrsc = k->wk_keyrsc[tid]; 820 iev.iev_rsc = rsc; 821 rt_ieee80211msg(ifp, RTM_IEEE80211_REPLAY, &iev, sizeof(iev)); 822 } 823 } 824 825 void 826 ieee80211_notify_michael_failure(struct ieee80211vap *vap, 827 const struct ieee80211_frame *wh, u_int keyix) 828 { 829 struct ifnet *ifp = vap->iv_ifp; 830 831 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2, 832 "michael MIC verification failed <keyix %u>", keyix); 833 vap->iv_stats.is_rx_tkipmic++; 834 835 if (ifp != NULL) { /* NB: for cipher test modules */ 836 struct ieee80211_michael_event iev; 837 838 IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1); 839 IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2); 840 iev.iev_cipher = IEEE80211_CIPHER_TKIP; 841 iev.iev_keyix = keyix; 842 rt_ieee80211msg(ifp, RTM_IEEE80211_MICHAEL, &iev, sizeof(iev)); 843 } 844 } 845 846 void 847 ieee80211_notify_wds_discover(struct ieee80211_node *ni) 848 { 849 struct ieee80211vap *vap = ni->ni_vap; 850 struct ifnet *ifp = vap->iv_ifp; 851 852 notify_macaddr(ifp, RTM_IEEE80211_WDS, ni->ni_macaddr); 853 } 854 855 void 856 ieee80211_notify_csa(struct ieee80211com *ic, 857 const struct ieee80211_channel *c, int mode, int count) 858 { 859 struct ieee80211vap *vap; 860 struct ifnet *ifp; 861 struct ieee80211_csa_event iev; 862 863 memset(&iev, 0, sizeof(iev)); 864 iev.iev_flags = c->ic_flags; 865 iev.iev_freq = c->ic_freq; 866 iev.iev_ieee = c->ic_ieee; 867 iev.iev_mode = mode; 868 iev.iev_count = count; 869 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 870 ifp = vap->iv_ifp; 871 rt_ieee80211msg(ifp, RTM_IEEE80211_CSA, &iev, sizeof(iev)); 872 } 873 } 874 875 void 876 ieee80211_notify_radar(struct ieee80211com *ic, 877 const struct ieee80211_channel *c) 878 { 879 struct ieee80211_radar_event iev; 880 struct ieee80211vap *vap; 881 struct ifnet *ifp; 882 883 memset(&iev, 0, sizeof(iev)); 884 iev.iev_flags = c->ic_flags; 885 iev.iev_freq = c->ic_freq; 886 iev.iev_ieee = c->ic_ieee; 887 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 888 ifp = vap->iv_ifp; 889 rt_ieee80211msg(ifp, RTM_IEEE80211_RADAR, &iev, sizeof(iev)); 890 } 891 } 892 893 void 894 ieee80211_notify_cac(struct ieee80211com *ic, 895 const struct ieee80211_channel *c, enum ieee80211_notify_cac_event type) 896 { 897 struct ieee80211_cac_event iev; 898 struct ieee80211vap *vap; 899 struct ifnet *ifp; 900 901 memset(&iev, 0, sizeof(iev)); 902 iev.iev_flags = c->ic_flags; 903 iev.iev_freq = c->ic_freq; 904 iev.iev_ieee = c->ic_ieee; 905 iev.iev_type = type; 906 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 907 ifp = vap->iv_ifp; 908 rt_ieee80211msg(ifp, RTM_IEEE80211_CAC, &iev, sizeof(iev)); 909 } 910 } 911 912 void 913 ieee80211_notify_node_deauth(struct ieee80211_node *ni) 914 { 915 struct ieee80211vap *vap = ni->ni_vap; 916 struct ifnet *ifp = vap->iv_ifp; 917 918 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node deauth"); 919 920 notify_macaddr(ifp, RTM_IEEE80211_DEAUTH, ni->ni_macaddr); 921 } 922 923 void 924 ieee80211_notify_node_auth(struct ieee80211_node *ni) 925 { 926 struct ieee80211vap *vap = ni->ni_vap; 927 struct ifnet *ifp = vap->iv_ifp; 928 929 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node auth"); 930 931 notify_macaddr(ifp, RTM_IEEE80211_AUTH, ni->ni_macaddr); 932 } 933 934 void 935 ieee80211_notify_country(struct ieee80211vap *vap, 936 const uint8_t bssid[IEEE80211_ADDR_LEN], const uint8_t cc[2]) 937 { 938 struct ifnet *ifp = vap->iv_ifp; 939 struct ieee80211_country_event iev; 940 941 memset(&iev, 0, sizeof(iev)); 942 IEEE80211_ADDR_COPY(iev.iev_addr, bssid); 943 iev.iev_cc[0] = cc[0]; 944 iev.iev_cc[1] = cc[1]; 945 rt_ieee80211msg(ifp, RTM_IEEE80211_COUNTRY, &iev, sizeof(iev)); 946 } 947 948 void 949 ieee80211_notify_radio(struct ieee80211com *ic, int state) 950 { 951 struct ieee80211_radio_event iev; 952 struct ieee80211vap *vap; 953 struct ifnet *ifp; 954 955 memset(&iev, 0, sizeof(iev)); 956 iev.iev_state = state; 957 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 958 ifp = vap->iv_ifp; 959 rt_ieee80211msg(ifp, RTM_IEEE80211_RADIO, &iev, sizeof(iev)); 960 } 961 } 962 963 /* IEEE Std 802.11a-1999, page 9, table 79 */ 964 #define IEEE80211_OFDM_SYM_TIME 4 965 #define IEEE80211_OFDM_PREAMBLE_TIME 16 966 #define IEEE80211_OFDM_SIGNAL_TIME 4 967 /* IEEE Std 802.11g-2003, page 44 */ 968 #define IEEE80211_OFDM_SIGNAL_EXT_TIME 6 969 970 /* IEEE Std 802.11a-1999, page 7, figure 107 */ 971 #define IEEE80211_OFDM_PLCP_SERVICE_NBITS 16 972 #define IEEE80211_OFDM_TAIL_NBITS 6 973 974 #define IEEE80211_OFDM_NBITS(frmlen) \ 975 (IEEE80211_OFDM_PLCP_SERVICE_NBITS + \ 976 ((frmlen) * NBBY) + \ 977 IEEE80211_OFDM_TAIL_NBITS) 978 979 #define IEEE80211_OFDM_NBITS_PER_SYM(kbps) \ 980 (((kbps) * IEEE80211_OFDM_SYM_TIME) / 1000) 981 982 #define IEEE80211_OFDM_NSYMS(kbps, frmlen) \ 983 howmany(IEEE80211_OFDM_NBITS((frmlen)), \ 984 IEEE80211_OFDM_NBITS_PER_SYM((kbps))) 985 986 #define IEEE80211_OFDM_TXTIME(kbps, frmlen) \ 987 (IEEE80211_OFDM_PREAMBLE_TIME + \ 988 IEEE80211_OFDM_SIGNAL_TIME + \ 989 (IEEE80211_OFDM_NSYMS((kbps), (frmlen)) * IEEE80211_OFDM_SYM_TIME)) 990 991 /* IEEE Std 802.11b-1999, page 28, subclause 18.3.4 */ 992 #define IEEE80211_CCK_PREAMBLE_LEN 144 993 #define IEEE80211_CCK_PLCP_HDR_TIME 48 994 #define IEEE80211_CCK_SHPREAMBLE_LEN 72 995 #define IEEE80211_CCK_SHPLCP_HDR_TIME 24 996 997 #define IEEE80211_CCK_NBITS(frmlen) ((frmlen) * NBBY) 998 #define IEEE80211_CCK_TXTIME(kbps, frmlen) \ 999 (((IEEE80211_CCK_NBITS((frmlen)) * 1000) + (kbps) - 1) / (kbps)) 1000 1001 uint16_t 1002 ieee80211_txtime(struct ieee80211_node *ni, u_int len, uint8_t rs_rate, 1003 uint32_t flags) 1004 { 1005 struct ieee80211vap *vap = ni->ni_vap; 1006 uint16_t txtime; 1007 int rate; 1008 1009 rs_rate &= IEEE80211_RATE_VAL; 1010 rate = rs_rate * 500; /* ieee80211 rate -> kbps */ 1011 1012 if (vap->iv_ic->ic_phytype == IEEE80211_T_OFDM) { 1013 /* 1014 * IEEE Std 802.11a-1999, page 37, equation (29) 1015 * IEEE Std 802.11g-2003, page 44, equation (42) 1016 */ 1017 txtime = IEEE80211_OFDM_TXTIME(rate, len); 1018 if (vap->iv_ic->ic_curmode == IEEE80211_MODE_11G) 1019 txtime += IEEE80211_OFDM_SIGNAL_EXT_TIME; 1020 } else { 1021 /* 1022 * IEEE Std 802.11b-1999, page 28, subclause 18.3.4 1023 * IEEE Std 802.11g-2003, page 45, equation (43) 1024 */ 1025 if (vap->iv_ic->ic_phytype == IEEE80211_T_OFDM_QUARTER+1) 1026 ++len; 1027 txtime = IEEE80211_CCK_TXTIME(rate, len); 1028 1029 /* 1030 * Short preamble is not applicable for DS 1Mbits/s 1031 */ 1032 if (rs_rate != 2 && (flags & IEEE80211_F_SHPREAMBLE)) { 1033 txtime += IEEE80211_CCK_SHPREAMBLE_LEN + 1034 IEEE80211_CCK_SHPLCP_HDR_TIME; 1035 } else { 1036 txtime += IEEE80211_CCK_PREAMBLE_LEN + 1037 IEEE80211_CCK_PLCP_HDR_TIME; 1038 } 1039 } 1040 return txtime; 1041 } 1042 1043 void 1044 ieee80211_load_module(const char *modname) 1045 { 1046 1047 #ifdef notyet 1048 (void)kern_kldload(curthread, modname, NULL); 1049 #else 1050 kprintf("%s: load the %s module by hand for now.\n", __func__, modname); 1051 #endif 1052 } 1053 1054 static eventhandler_tag wlan_bpfevent; 1055 static eventhandler_tag wlan_ifllevent; 1056 1057 static void 1058 bpf_track_event(void *arg, struct ifnet *ifp, int dlt, int attach) 1059 { 1060 /* NB: identify vap's by if_start */ 1061 1062 if (dlt == DLT_IEEE802_11_RADIO && 1063 ifp->if_start == ieee80211_vap_start) { 1064 struct ieee80211vap *vap = ifp->if_softc; 1065 /* 1066 * Track bpf radiotap listener state. We mark the vap 1067 * to indicate if any listener is present and the com 1068 * to indicate if any listener exists on any associated 1069 * vap. This flag is used by drivers to prepare radiotap 1070 * state only when needed. 1071 */ 1072 if (attach) { 1073 ieee80211_syncflag_ext(vap, IEEE80211_FEXT_BPF); 1074 if (vap->iv_opmode == IEEE80211_M_MONITOR) 1075 atomic_add_int(&vap->iv_ic->ic_montaps, 1); 1076 } else if (!vap->iv_rawbpf) { 1077 ieee80211_syncflag_ext(vap, -IEEE80211_FEXT_BPF); 1078 if (vap->iv_opmode == IEEE80211_M_MONITOR) 1079 atomic_subtract_int(&vap->iv_ic->ic_montaps, 1); 1080 } 1081 } 1082 } 1083 1084 const char * 1085 ether_sprintf(const u_char *buf) 1086 { 1087 static char ethstr[MAXCPU][ETHER_ADDRSTRLEN + 1]; 1088 char *ptr = ethstr[mycpu->gd_cpuid]; 1089 1090 kether_ntoa(buf, ptr); 1091 return (ptr); 1092 } 1093 1094 /* 1095 * Change MAC address on the vap (if was not started). 1096 */ 1097 static void 1098 wlan_iflladdr_event(void *arg __unused, struct ifnet *ifp) 1099 { 1100 /* NB: identify vap's by if_init */ 1101 if (ifp->if_init == ieee80211_init && 1102 (ifp->if_flags & IFF_UP) == 0) { 1103 struct ieee80211vap *vap = ifp->if_softc; 1104 IEEE80211_ADDR_COPY(vap->iv_myaddr, IF_LLADDR(ifp)); 1105 } 1106 } 1107 1108 /* 1109 * Module glue. 1110 * 1111 * NB: the module name is "wlan" for compatibility with NetBSD. 1112 */ 1113 static int 1114 wlan_modevent(module_t mod, int type, void *unused) 1115 { 1116 int error; 1117 1118 switch (type) { 1119 case MOD_LOAD: 1120 if (bootverbose) 1121 kprintf("wlan: <802.11 Link Layer>\n"); 1122 wlan_bpfevent = EVENTHANDLER_REGISTER(bpf_track, 1123 bpf_track_event, 0, 1124 EVENTHANDLER_PRI_ANY); 1125 wlan_ifllevent = EVENTHANDLER_REGISTER(iflladdr_event, 1126 wlan_iflladdr_event, NULL, 1127 EVENTHANDLER_PRI_ANY); 1128 if_clone_attach(&wlan_cloner); 1129 error = 0; 1130 break; 1131 case MOD_UNLOAD: 1132 if_clone_detach(&wlan_cloner); 1133 EVENTHANDLER_DEREGISTER(bpf_track, wlan_bpfevent); 1134 EVENTHANDLER_DEREGISTER(iflladdr_event, wlan_ifllevent); 1135 error = 0; 1136 break; 1137 default: 1138 error = EINVAL; 1139 break; 1140 } 1141 return error; 1142 } 1143 1144 static moduledata_t wlan_mod = { 1145 "wlan", 1146 wlan_modevent, 1147 0 1148 }; 1149 DECLARE_MODULE(wlan, wlan_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST); 1150 MODULE_VERSION(wlan, 1); 1151 MODULE_DEPEND(wlan, ether, 1, 1, 1); 1152