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 26#include <sys/cdefs.h> 27__FBSDID("$FreeBSD: stable/11/sys/net80211/ieee80211_freebsd.c 343817 2019-02-06 01:47:22Z avos $"); 28 29/* 30 * IEEE 802.11 support (FreeBSD-specific code) 31 */ 32#include "opt_wlan.h" 33 34#include <sys/param.h> 35#include <sys/systm.h> 36#include <sys/eventhandler.h> 37#include <sys/kernel.h> 38#include <sys/linker.h> 39#include <sys/malloc.h> 40#include <sys/mbuf.h> 41#include <sys/module.h> 42#include <sys/proc.h> 43#include <sys/sysctl.h> 44 45#include <sys/socket.h> 46 47#include <net/bpf.h> 48#include <net/if.h> 49#include <net/if_var.h> 50#include <net/if_dl.h> 51#include <net/if_clone.h> 52#include <net/if_media.h> 53#include <net/if_types.h> 54#include <net/ethernet.h> 55#include <net/route.h> 56#include <net/vnet.h> 57 58#include <net80211/ieee80211_var.h> 59#include <net80211/ieee80211_input.h> 60 61SYSCTL_NODE(_net, OID_AUTO, wlan, CTLFLAG_RD, 0, "IEEE 80211 parameters"); 62 63#ifdef IEEE80211_DEBUG 64static int ieee80211_debug = 0; 65SYSCTL_INT(_net_wlan, OID_AUTO, debug, CTLFLAG_RW, &ieee80211_debug, 66 0, "debugging printfs"); 67#endif 68 69static const char wlanname[] = "wlan"; 70static struct if_clone *wlan_cloner; 71 72static int 73wlan_clone_create(struct if_clone *ifc, int unit, caddr_t params) 74{ 75 struct ieee80211_clone_params cp; 76 struct ieee80211vap *vap; 77 struct ieee80211com *ic; 78 int error; 79 80 error = copyin(params, &cp, sizeof(cp)); 81 if (error) 82 return error; 83 ic = ieee80211_find_com(cp.icp_parent); 84 if (ic == NULL) 85 return ENXIO; 86 if (cp.icp_opmode >= IEEE80211_OPMODE_MAX) { 87 ic_printf(ic, "%s: invalid opmode %d\n", __func__, 88 cp.icp_opmode); 89 return EINVAL; 90 } 91 if ((ic->ic_caps & ieee80211_opcap[cp.icp_opmode]) == 0) { 92 ic_printf(ic, "%s mode not supported\n", 93 ieee80211_opmode_name[cp.icp_opmode]); 94 return EOPNOTSUPP; 95 } 96 if ((cp.icp_flags & IEEE80211_CLONE_TDMA) && 97#ifdef IEEE80211_SUPPORT_TDMA 98 (ic->ic_caps & IEEE80211_C_TDMA) == 0 99#else 100 (1) 101#endif 102 ) { 103 ic_printf(ic, "TDMA not supported\n"); 104 return EOPNOTSUPP; 105 } 106 vap = ic->ic_vap_create(ic, wlanname, unit, 107 cp.icp_opmode, cp.icp_flags, cp.icp_bssid, 108 cp.icp_flags & IEEE80211_CLONE_MACADDR ? 109 cp.icp_macaddr : ic->ic_macaddr); 110 111 return (vap == NULL ? EIO : 0); 112} 113 114static void 115wlan_clone_destroy(struct ifnet *ifp) 116{ 117 struct ieee80211vap *vap = ifp->if_softc; 118 struct ieee80211com *ic = vap->iv_ic; 119 120 ic->ic_vap_delete(vap); 121} 122 123void 124ieee80211_vap_destroy(struct ieee80211vap *vap) 125{ 126 CURVNET_SET(vap->iv_ifp->if_vnet); 127 if_clone_destroyif(wlan_cloner, vap->iv_ifp); 128 CURVNET_RESTORE(); 129} 130 131int 132ieee80211_sysctl_msecs_ticks(SYSCTL_HANDLER_ARGS) 133{ 134 int msecs = ticks_to_msecs(*(int *)arg1); 135 int error, t; 136 137 error = sysctl_handle_int(oidp, &msecs, 0, req); 138 if (error || !req->newptr) 139 return error; 140 t = msecs_to_ticks(msecs); 141 *(int *)arg1 = (t < 1) ? 1 : t; 142 return 0; 143} 144 145static int 146ieee80211_sysctl_inact(SYSCTL_HANDLER_ARGS) 147{ 148 int inact = (*(int *)arg1) * IEEE80211_INACT_WAIT; 149 int error; 150 151 error = sysctl_handle_int(oidp, &inact, 0, req); 152 if (error || !req->newptr) 153 return error; 154 *(int *)arg1 = inact / IEEE80211_INACT_WAIT; 155 return 0; 156} 157 158static int 159ieee80211_sysctl_parent(SYSCTL_HANDLER_ARGS) 160{ 161 struct ieee80211com *ic = arg1; 162 163 return SYSCTL_OUT_STR(req, ic->ic_name); 164} 165 166static int 167ieee80211_sysctl_radar(SYSCTL_HANDLER_ARGS) 168{ 169 struct ieee80211com *ic = arg1; 170 int t = 0, error; 171 172 error = sysctl_handle_int(oidp, &t, 0, req); 173 if (error || !req->newptr) 174 return error; 175 IEEE80211_LOCK(ic); 176 ieee80211_dfs_notify_radar(ic, ic->ic_curchan); 177 IEEE80211_UNLOCK(ic); 178 return 0; 179} 180 181/* 182 * For now, just restart everything. 183 * 184 * Later on, it'd be nice to have a separate VAP restart to 185 * full-device restart. 186 */ 187static int 188ieee80211_sysctl_vap_restart(SYSCTL_HANDLER_ARGS) 189{ 190 struct ieee80211vap *vap = arg1; 191 int t = 0, error; 192 193 error = sysctl_handle_int(oidp, &t, 0, req); 194 if (error || !req->newptr) 195 return error; 196 197 ieee80211_restart_all(vap->iv_ic); 198 return 0; 199} 200 201void 202ieee80211_sysctl_attach(struct ieee80211com *ic) 203{ 204} 205 206void 207ieee80211_sysctl_detach(struct ieee80211com *ic) 208{ 209} 210 211void 212ieee80211_sysctl_vattach(struct ieee80211vap *vap) 213{ 214 struct ifnet *ifp = vap->iv_ifp; 215 struct sysctl_ctx_list *ctx; 216 struct sysctl_oid *oid; 217 char num[14]; /* sufficient for 32 bits */ 218 219 ctx = (struct sysctl_ctx_list *) IEEE80211_MALLOC(sizeof(struct sysctl_ctx_list), 220 M_DEVBUF, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 221 if (ctx == NULL) { 222 if_printf(ifp, "%s: cannot allocate sysctl context!\n", 223 __func__); 224 return; 225 } 226 sysctl_ctx_init(ctx); 227 snprintf(num, sizeof(num), "%u", ifp->if_dunit); 228 oid = SYSCTL_ADD_NODE(ctx, &SYSCTL_NODE_CHILDREN(_net, wlan), 229 OID_AUTO, num, CTLFLAG_RD, NULL, ""); 230 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 231 "%parent", CTLTYPE_STRING | CTLFLAG_RD, vap->iv_ic, 0, 232 ieee80211_sysctl_parent, "A", "parent device"); 233 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 234 "driver_caps", CTLFLAG_RW, &vap->iv_caps, 0, 235 "driver capabilities"); 236#ifdef IEEE80211_DEBUG 237 vap->iv_debug = ieee80211_debug; 238 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 239 "debug", CTLFLAG_RW, &vap->iv_debug, 0, 240 "control debugging printfs"); 241#endif 242 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 243 "bmiss_max", CTLFLAG_RW, &vap->iv_bmiss_max, 0, 244 "consecutive beacon misses before scanning"); 245 /* XXX inherit from tunables */ 246 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 247 "inact_run", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_run, 0, 248 ieee80211_sysctl_inact, "I", 249 "station inactivity timeout (sec)"); 250 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 251 "inact_probe", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_probe, 0, 252 ieee80211_sysctl_inact, "I", 253 "station inactivity probe timeout (sec)"); 254 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 255 "inact_auth", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_auth, 0, 256 ieee80211_sysctl_inact, "I", 257 "station authentication timeout (sec)"); 258 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 259 "inact_init", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_init, 0, 260 ieee80211_sysctl_inact, "I", 261 "station initial state timeout (sec)"); 262 if (vap->iv_htcaps & IEEE80211_HTC_HT) { 263 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 264 "ampdu_mintraffic_bk", CTLFLAG_RW, 265 &vap->iv_ampdu_mintraffic[WME_AC_BK], 0, 266 "BK traffic tx aggr threshold (pps)"); 267 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 268 "ampdu_mintraffic_be", CTLFLAG_RW, 269 &vap->iv_ampdu_mintraffic[WME_AC_BE], 0, 270 "BE traffic tx aggr threshold (pps)"); 271 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 272 "ampdu_mintraffic_vo", CTLFLAG_RW, 273 &vap->iv_ampdu_mintraffic[WME_AC_VO], 0, 274 "VO traffic tx aggr threshold (pps)"); 275 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 276 "ampdu_mintraffic_vi", CTLFLAG_RW, 277 &vap->iv_ampdu_mintraffic[WME_AC_VI], 0, 278 "VI traffic tx aggr threshold (pps)"); 279 } 280 281 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 282 "force_restart", CTLTYPE_INT | CTLFLAG_RW, vap, 0, 283 ieee80211_sysctl_vap_restart, "I", 284 "force a VAP restart"); 285 286 if (vap->iv_caps & IEEE80211_C_DFS) { 287 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 288 "radar", CTLTYPE_INT | CTLFLAG_RW, vap->iv_ic, 0, 289 ieee80211_sysctl_radar, "I", "simulate radar event"); 290 } 291 vap->iv_sysctl = ctx; 292 vap->iv_oid = oid; 293} 294 295void 296ieee80211_sysctl_vdetach(struct ieee80211vap *vap) 297{ 298 299 if (vap->iv_sysctl != NULL) { 300 sysctl_ctx_free(vap->iv_sysctl); 301 IEEE80211_FREE(vap->iv_sysctl, M_DEVBUF); 302 vap->iv_sysctl = NULL; 303 } 304} 305 306#define MS(_v, _f) (((_v) & _f##_M) >> _f##_S) 307int 308ieee80211_com_vincref(struct ieee80211vap *vap) 309{ 310 uint32_t ostate; 311 312 ostate = atomic_fetchadd_32(&vap->iv_com_state, IEEE80211_COM_REF_ADD); 313 314 if (ostate & IEEE80211_COM_DETACHED) { 315 atomic_subtract_32(&vap->iv_com_state, IEEE80211_COM_REF_ADD); 316 return (ENETDOWN); 317 } 318 319 if (MS(ostate, IEEE80211_COM_REF) == IEEE80211_COM_REF_MAX) { 320 atomic_subtract_32(&vap->iv_com_state, IEEE80211_COM_REF_ADD); 321 return (EOVERFLOW); 322 } 323 324 return (0); 325} 326 327void 328ieee80211_com_vdecref(struct ieee80211vap *vap) 329{ 330 uint32_t ostate; 331 332 ostate = atomic_fetchadd_32(&vap->iv_com_state, -IEEE80211_COM_REF_ADD); 333 334 KASSERT(MS(ostate, IEEE80211_COM_REF) != 0, 335 ("com reference counter underflow")); 336 337 (void) ostate; 338} 339 340void 341ieee80211_com_vdetach(struct ieee80211vap *vap) 342{ 343 int sleep_time; 344 345 sleep_time = msecs_to_ticks(250); 346 if (sleep_time == 0) 347 sleep_time = 1; 348 349 atomic_set_32(&vap->iv_com_state, IEEE80211_COM_DETACHED); 350 while (MS(atomic_load_32(&vap->iv_com_state), IEEE80211_COM_REF) != 0) 351 pause("comref", sleep_time); 352} 353#undef MS 354 355int 356ieee80211_node_dectestref(struct ieee80211_node *ni) 357{ 358 /* XXX need equivalent of atomic_dec_and_test */ 359 atomic_subtract_int(&ni->ni_refcnt, 1); 360 return atomic_cmpset_int(&ni->ni_refcnt, 0, 1); 361} 362 363void 364ieee80211_drain_ifq(struct ifqueue *ifq) 365{ 366 struct ieee80211_node *ni; 367 struct mbuf *m; 368 369 for (;;) { 370 IF_DEQUEUE(ifq, m); 371 if (m == NULL) 372 break; 373 374 ni = (struct ieee80211_node *)m->m_pkthdr.rcvif; 375 KASSERT(ni != NULL, ("frame w/o node")); 376 ieee80211_free_node(ni); 377 m->m_pkthdr.rcvif = NULL; 378 379 m_freem(m); 380 } 381} 382 383void 384ieee80211_flush_ifq(struct ifqueue *ifq, struct ieee80211vap *vap) 385{ 386 struct ieee80211_node *ni; 387 struct mbuf *m, **mprev; 388 389 IF_LOCK(ifq); 390 mprev = &ifq->ifq_head; 391 while ((m = *mprev) != NULL) { 392 ni = (struct ieee80211_node *)m->m_pkthdr.rcvif; 393 if (ni != NULL && ni->ni_vap == vap) { 394 *mprev = m->m_nextpkt; /* remove from list */ 395 ifq->ifq_len--; 396 397 m_freem(m); 398 ieee80211_free_node(ni); /* reclaim ref */ 399 } else 400 mprev = &m->m_nextpkt; 401 } 402 /* recalculate tail ptr */ 403 m = ifq->ifq_head; 404 for (; m != NULL && m->m_nextpkt != NULL; m = m->m_nextpkt) 405 ; 406 ifq->ifq_tail = m; 407 IF_UNLOCK(ifq); 408} 409 410/* 411 * As above, for mbufs allocated with m_gethdr/MGETHDR 412 * or initialized by M_COPY_PKTHDR. 413 */ 414#define MC_ALIGN(m, len) \ 415do { \ 416 (m)->m_data += rounddown2(MCLBYTES - (len), sizeof(long)); \ 417} while (/* CONSTCOND */ 0) 418 419/* 420 * Allocate and setup a management frame of the specified 421 * size. We return the mbuf and a pointer to the start 422 * of the contiguous data area that's been reserved based 423 * on the packet length. The data area is forced to 32-bit 424 * alignment and the buffer length to a multiple of 4 bytes. 425 * This is done mainly so beacon frames (that require this) 426 * can use this interface too. 427 */ 428struct mbuf * 429ieee80211_getmgtframe(uint8_t **frm, int headroom, int pktlen) 430{ 431 struct mbuf *m; 432 u_int len; 433 434 /* 435 * NB: we know the mbuf routines will align the data area 436 * so we don't need to do anything special. 437 */ 438 len = roundup2(headroom + pktlen, 4); 439 KASSERT(len <= MCLBYTES, ("802.11 mgt frame too large: %u", len)); 440 if (len < MINCLSIZE) { 441 m = m_gethdr(M_NOWAIT, MT_DATA); 442 /* 443 * Align the data in case additional headers are added. 444 * This should only happen when a WEP header is added 445 * which only happens for shared key authentication mgt 446 * frames which all fit in MHLEN. 447 */ 448 if (m != NULL) 449 M_ALIGN(m, len); 450 } else { 451 m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR); 452 if (m != NULL) 453 MC_ALIGN(m, len); 454 } 455 if (m != NULL) { 456 m->m_data += headroom; 457 *frm = m->m_data; 458 } 459 return m; 460} 461 462#ifndef __NO_STRICT_ALIGNMENT 463/* 464 * Re-align the payload in the mbuf. This is mainly used (right now) 465 * to handle IP header alignment requirements on certain architectures. 466 */ 467struct mbuf * 468ieee80211_realign(struct ieee80211vap *vap, struct mbuf *m, size_t align) 469{ 470 int pktlen, space; 471 struct mbuf *n; 472 473 pktlen = m->m_pkthdr.len; 474 space = pktlen + align; 475 if (space < MINCLSIZE) 476 n = m_gethdr(M_NOWAIT, MT_DATA); 477 else { 478 n = m_getjcl(M_NOWAIT, MT_DATA, M_PKTHDR, 479 space <= MCLBYTES ? MCLBYTES : 480#if MJUMPAGESIZE != MCLBYTES 481 space <= MJUMPAGESIZE ? MJUMPAGESIZE : 482#endif 483 space <= MJUM9BYTES ? MJUM9BYTES : MJUM16BYTES); 484 } 485 if (__predict_true(n != NULL)) { 486 m_move_pkthdr(n, m); 487 n->m_data = (caddr_t)(ALIGN(n->m_data + align) - align); 488 m_copydata(m, 0, pktlen, mtod(n, caddr_t)); 489 n->m_len = pktlen; 490 } else { 491 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 492 mtod(m, const struct ieee80211_frame *), NULL, 493 "%s", "no mbuf to realign"); 494 vap->iv_stats.is_rx_badalign++; 495 } 496 m_freem(m); 497 return n; 498} 499#endif /* !__NO_STRICT_ALIGNMENT */ 500 501int 502ieee80211_add_callback(struct mbuf *m, 503 void (*func)(struct ieee80211_node *, void *, int), void *arg) 504{ 505 struct m_tag *mtag; 506 struct ieee80211_cb *cb; 507 508 mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_CALLBACK, 509 sizeof(struct ieee80211_cb), M_NOWAIT); 510 if (mtag == NULL) 511 return 0; 512 513 cb = (struct ieee80211_cb *)(mtag+1); 514 cb->func = func; 515 cb->arg = arg; 516 m_tag_prepend(m, mtag); 517 m->m_flags |= M_TXCB; 518 return 1; 519} 520 521int 522ieee80211_add_xmit_params(struct mbuf *m, 523 const struct ieee80211_bpf_params *params) 524{ 525 struct m_tag *mtag; 526 struct ieee80211_tx_params *tx; 527 528 mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_XMIT_PARAMS, 529 sizeof(struct ieee80211_tx_params), M_NOWAIT); 530 if (mtag == NULL) 531 return (0); 532 533 tx = (struct ieee80211_tx_params *)(mtag+1); 534 memcpy(&tx->params, params, sizeof(struct ieee80211_bpf_params)); 535 m_tag_prepend(m, mtag); 536 return (1); 537} 538 539int 540ieee80211_get_xmit_params(struct mbuf *m, 541 struct ieee80211_bpf_params *params) 542{ 543 struct m_tag *mtag; 544 struct ieee80211_tx_params *tx; 545 546 mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_XMIT_PARAMS, 547 NULL); 548 if (mtag == NULL) 549 return (-1); 550 tx = (struct ieee80211_tx_params *)(mtag + 1); 551 memcpy(params, &tx->params, sizeof(struct ieee80211_bpf_params)); 552 return (0); 553} 554 555void 556ieee80211_process_callback(struct ieee80211_node *ni, 557 struct mbuf *m, int status) 558{ 559 struct m_tag *mtag; 560 561 mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_CALLBACK, NULL); 562 if (mtag != NULL) { 563 struct ieee80211_cb *cb = (struct ieee80211_cb *)(mtag+1); 564 cb->func(ni, cb->arg, status); 565 } 566} 567 568/* 569 * Add RX parameters to the given mbuf. 570 * 571 * Returns 1 if OK, 0 on error. 572 */ 573int 574ieee80211_add_rx_params(struct mbuf *m, const struct ieee80211_rx_stats *rxs) 575{ 576 struct m_tag *mtag; 577 struct ieee80211_rx_params *rx; 578 579 mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_RECV_PARAMS, 580 sizeof(struct ieee80211_rx_stats), M_NOWAIT); 581 if (mtag == NULL) 582 return (0); 583 584 rx = (struct ieee80211_rx_params *)(mtag + 1); 585 memcpy(&rx->params, rxs, sizeof(*rxs)); 586 m_tag_prepend(m, mtag); 587 return (1); 588} 589 590int 591ieee80211_get_rx_params(struct mbuf *m, struct ieee80211_rx_stats *rxs) 592{ 593 struct m_tag *mtag; 594 struct ieee80211_rx_params *rx; 595 596 mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_RECV_PARAMS, 597 NULL); 598 if (mtag == NULL) 599 return (-1); 600 rx = (struct ieee80211_rx_params *)(mtag + 1); 601 memcpy(rxs, &rx->params, sizeof(*rxs)); 602 return (0); 603} 604 605/* 606 * Transmit a frame to the parent interface. 607 */ 608int 609ieee80211_parent_xmitpkt(struct ieee80211com *ic, struct mbuf *m) 610{ 611 int error; 612 613 /* 614 * Assert the IC TX lock is held - this enforces the 615 * processing -> queuing order is maintained 616 */ 617 IEEE80211_TX_LOCK_ASSERT(ic); 618 error = ic->ic_transmit(ic, m); 619 if (error) { 620 struct ieee80211_node *ni; 621 622 ni = (struct ieee80211_node *)m->m_pkthdr.rcvif; 623 624 /* XXX number of fragments */ 625 if_inc_counter(ni->ni_vap->iv_ifp, IFCOUNTER_OERRORS, 1); 626 ieee80211_free_node(ni); 627 ieee80211_free_mbuf(m); 628 } 629 return (error); 630} 631 632/* 633 * Transmit a frame to the VAP interface. 634 */ 635int 636ieee80211_vap_xmitpkt(struct ieee80211vap *vap, struct mbuf *m) 637{ 638 struct ifnet *ifp = vap->iv_ifp; 639 640 /* 641 * When transmitting via the VAP, we shouldn't hold 642 * any IC TX lock as the VAP TX path will acquire it. 643 */ 644 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 645 646 return (ifp->if_transmit(ifp, m)); 647 648} 649 650#include <sys/libkern.h> 651 652void 653get_random_bytes(void *p, size_t n) 654{ 655 uint8_t *dp = p; 656 657 while (n > 0) { 658 uint32_t v = arc4random(); 659 size_t nb = n > sizeof(uint32_t) ? sizeof(uint32_t) : n; 660 bcopy(&v, dp, n > sizeof(uint32_t) ? sizeof(uint32_t) : n); 661 dp += sizeof(uint32_t), n -= nb; 662 } 663} 664 665/* 666 * Helper function for events that pass just a single mac address. 667 */ 668static void 669notify_macaddr(struct ifnet *ifp, int op, const uint8_t mac[IEEE80211_ADDR_LEN]) 670{ 671 struct ieee80211_join_event iev; 672 673 CURVNET_SET(ifp->if_vnet); 674 memset(&iev, 0, sizeof(iev)); 675 IEEE80211_ADDR_COPY(iev.iev_addr, mac); 676 rt_ieee80211msg(ifp, op, &iev, sizeof(iev)); 677 CURVNET_RESTORE(); 678} 679 680void 681ieee80211_notify_node_join(struct ieee80211_node *ni, int newassoc) 682{ 683 struct ieee80211vap *vap = ni->ni_vap; 684 struct ifnet *ifp = vap->iv_ifp; 685 686 CURVNET_SET_QUIET(ifp->if_vnet); 687 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode join", 688 (ni == vap->iv_bss) ? "bss " : ""); 689 690 if (ni == vap->iv_bss) { 691 notify_macaddr(ifp, newassoc ? 692 RTM_IEEE80211_ASSOC : RTM_IEEE80211_REASSOC, ni->ni_bssid); 693 if_link_state_change(ifp, LINK_STATE_UP); 694 } else { 695 notify_macaddr(ifp, newassoc ? 696 RTM_IEEE80211_JOIN : RTM_IEEE80211_REJOIN, ni->ni_macaddr); 697 } 698 CURVNET_RESTORE(); 699} 700 701void 702ieee80211_notify_node_leave(struct ieee80211_node *ni) 703{ 704 struct ieee80211vap *vap = ni->ni_vap; 705 struct ifnet *ifp = vap->iv_ifp; 706 707 CURVNET_SET_QUIET(ifp->if_vnet); 708 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode leave", 709 (ni == vap->iv_bss) ? "bss " : ""); 710 711 if (ni == vap->iv_bss) { 712 rt_ieee80211msg(ifp, RTM_IEEE80211_DISASSOC, NULL, 0); 713 if_link_state_change(ifp, LINK_STATE_DOWN); 714 } else { 715 /* fire off wireless event station leaving */ 716 notify_macaddr(ifp, RTM_IEEE80211_LEAVE, ni->ni_macaddr); 717 } 718 CURVNET_RESTORE(); 719} 720 721void 722ieee80211_notify_scan_done(struct ieee80211vap *vap) 723{ 724 struct ifnet *ifp = vap->iv_ifp; 725 726 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, "%s\n", "notify scan done"); 727 728 /* dispatch wireless event indicating scan completed */ 729 CURVNET_SET(ifp->if_vnet); 730 rt_ieee80211msg(ifp, RTM_IEEE80211_SCAN, NULL, 0); 731 CURVNET_RESTORE(); 732} 733 734void 735ieee80211_notify_replay_failure(struct ieee80211vap *vap, 736 const struct ieee80211_frame *wh, const struct ieee80211_key *k, 737 u_int64_t rsc, int tid) 738{ 739 struct ifnet *ifp = vap->iv_ifp; 740 741 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2, 742 "%s replay detected tid %d <rsc %ju, csc %ju, keyix %u rxkeyix %u>", 743 k->wk_cipher->ic_name, tid, (intmax_t) rsc, 744 (intmax_t) k->wk_keyrsc[tid], 745 k->wk_keyix, k->wk_rxkeyix); 746 747 if (ifp != NULL) { /* NB: for cipher test modules */ 748 struct ieee80211_replay_event iev; 749 750 IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1); 751 IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2); 752 iev.iev_cipher = k->wk_cipher->ic_cipher; 753 if (k->wk_rxkeyix != IEEE80211_KEYIX_NONE) 754 iev.iev_keyix = k->wk_rxkeyix; 755 else 756 iev.iev_keyix = k->wk_keyix; 757 iev.iev_keyrsc = k->wk_keyrsc[tid]; 758 iev.iev_rsc = rsc; 759 CURVNET_SET(ifp->if_vnet); 760 rt_ieee80211msg(ifp, RTM_IEEE80211_REPLAY, &iev, sizeof(iev)); 761 CURVNET_RESTORE(); 762 } 763} 764 765void 766ieee80211_notify_michael_failure(struct ieee80211vap *vap, 767 const struct ieee80211_frame *wh, u_int keyix) 768{ 769 struct ifnet *ifp = vap->iv_ifp; 770 771 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2, 772 "michael MIC verification failed <keyix %u>", keyix); 773 vap->iv_stats.is_rx_tkipmic++; 774 775 if (ifp != NULL) { /* NB: for cipher test modules */ 776 struct ieee80211_michael_event iev; 777 778 IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1); 779 IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2); 780 iev.iev_cipher = IEEE80211_CIPHER_TKIP; 781 iev.iev_keyix = keyix; 782 CURVNET_SET(ifp->if_vnet); 783 rt_ieee80211msg(ifp, RTM_IEEE80211_MICHAEL, &iev, sizeof(iev)); 784 CURVNET_RESTORE(); 785 } 786} 787 788void 789ieee80211_notify_wds_discover(struct ieee80211_node *ni) 790{ 791 struct ieee80211vap *vap = ni->ni_vap; 792 struct ifnet *ifp = vap->iv_ifp; 793 794 notify_macaddr(ifp, RTM_IEEE80211_WDS, ni->ni_macaddr); 795} 796 797void 798ieee80211_notify_csa(struct ieee80211com *ic, 799 const struct ieee80211_channel *c, int mode, int count) 800{ 801 struct ieee80211_csa_event iev; 802 struct ieee80211vap *vap; 803 struct ifnet *ifp; 804 805 memset(&iev, 0, sizeof(iev)); 806 iev.iev_flags = c->ic_flags; 807 iev.iev_freq = c->ic_freq; 808 iev.iev_ieee = c->ic_ieee; 809 iev.iev_mode = mode; 810 iev.iev_count = count; 811 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 812 ifp = vap->iv_ifp; 813 CURVNET_SET(ifp->if_vnet); 814 rt_ieee80211msg(ifp, RTM_IEEE80211_CSA, &iev, sizeof(iev)); 815 CURVNET_RESTORE(); 816 } 817} 818 819void 820ieee80211_notify_radar(struct ieee80211com *ic, 821 const struct ieee80211_channel *c) 822{ 823 struct ieee80211_radar_event iev; 824 struct ieee80211vap *vap; 825 struct ifnet *ifp; 826 827 memset(&iev, 0, sizeof(iev)); 828 iev.iev_flags = c->ic_flags; 829 iev.iev_freq = c->ic_freq; 830 iev.iev_ieee = c->ic_ieee; 831 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 832 ifp = vap->iv_ifp; 833 CURVNET_SET(ifp->if_vnet); 834 rt_ieee80211msg(ifp, RTM_IEEE80211_RADAR, &iev, sizeof(iev)); 835 CURVNET_RESTORE(); 836 } 837} 838 839void 840ieee80211_notify_cac(struct ieee80211com *ic, 841 const struct ieee80211_channel *c, enum ieee80211_notify_cac_event type) 842{ 843 struct ieee80211_cac_event iev; 844 struct ieee80211vap *vap; 845 struct ifnet *ifp; 846 847 memset(&iev, 0, sizeof(iev)); 848 iev.iev_flags = c->ic_flags; 849 iev.iev_freq = c->ic_freq; 850 iev.iev_ieee = c->ic_ieee; 851 iev.iev_type = type; 852 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 853 ifp = vap->iv_ifp; 854 CURVNET_SET(ifp->if_vnet); 855 rt_ieee80211msg(ifp, RTM_IEEE80211_CAC, &iev, sizeof(iev)); 856 CURVNET_RESTORE(); 857 } 858} 859 860void 861ieee80211_notify_node_deauth(struct ieee80211_node *ni) 862{ 863 struct ieee80211vap *vap = ni->ni_vap; 864 struct ifnet *ifp = vap->iv_ifp; 865 866 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node deauth"); 867 868 notify_macaddr(ifp, RTM_IEEE80211_DEAUTH, ni->ni_macaddr); 869} 870 871void 872ieee80211_notify_node_auth(struct ieee80211_node *ni) 873{ 874 struct ieee80211vap *vap = ni->ni_vap; 875 struct ifnet *ifp = vap->iv_ifp; 876 877 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node auth"); 878 879 notify_macaddr(ifp, RTM_IEEE80211_AUTH, ni->ni_macaddr); 880} 881 882void 883ieee80211_notify_country(struct ieee80211vap *vap, 884 const uint8_t bssid[IEEE80211_ADDR_LEN], const uint8_t cc[2]) 885{ 886 struct ifnet *ifp = vap->iv_ifp; 887 struct ieee80211_country_event iev; 888 889 memset(&iev, 0, sizeof(iev)); 890 IEEE80211_ADDR_COPY(iev.iev_addr, bssid); 891 iev.iev_cc[0] = cc[0]; 892 iev.iev_cc[1] = cc[1]; 893 CURVNET_SET(ifp->if_vnet); 894 rt_ieee80211msg(ifp, RTM_IEEE80211_COUNTRY, &iev, sizeof(iev)); 895 CURVNET_RESTORE(); 896} 897 898void 899ieee80211_notify_radio(struct ieee80211com *ic, int state) 900{ 901 struct ieee80211_radio_event iev; 902 struct ieee80211vap *vap; 903 struct ifnet *ifp; 904 905 memset(&iev, 0, sizeof(iev)); 906 iev.iev_state = state; 907 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 908 ifp = vap->iv_ifp; 909 CURVNET_SET(ifp->if_vnet); 910 rt_ieee80211msg(ifp, RTM_IEEE80211_RADIO, &iev, sizeof(iev)); 911 CURVNET_RESTORE(); 912 } 913} 914 915void 916ieee80211_load_module(const char *modname) 917{ 918 919#ifdef notyet 920 (void)kern_kldload(curthread, modname, NULL); 921#else 922 printf("%s: load the %s module by hand for now.\n", __func__, modname); 923#endif 924} 925 926static eventhandler_tag wlan_bpfevent; 927static eventhandler_tag wlan_ifllevent; 928 929static void 930bpf_track(void *arg, struct ifnet *ifp, int dlt, int attach) 931{ 932 /* NB: identify vap's by if_init */ 933 if (dlt == DLT_IEEE802_11_RADIO && 934 ifp->if_init == ieee80211_init) { 935 struct ieee80211vap *vap = ifp->if_softc; 936 /* 937 * Track bpf radiotap listener state. We mark the vap 938 * to indicate if any listener is present and the com 939 * to indicate if any listener exists on any associated 940 * vap. This flag is used by drivers to prepare radiotap 941 * state only when needed. 942 */ 943 if (attach) { 944 ieee80211_syncflag_ext(vap, IEEE80211_FEXT_BPF); 945 if (vap->iv_opmode == IEEE80211_M_MONITOR) 946 atomic_add_int(&vap->iv_ic->ic_montaps, 1); 947 } else if (!bpf_peers_present(vap->iv_rawbpf)) { 948 ieee80211_syncflag_ext(vap, -IEEE80211_FEXT_BPF); 949 if (vap->iv_opmode == IEEE80211_M_MONITOR) 950 atomic_subtract_int(&vap->iv_ic->ic_montaps, 1); 951 } 952 } 953} 954 955/* 956 * Change MAC address on the vap (if was not started). 957 */ 958static void 959wlan_iflladdr(void *arg __unused, struct ifnet *ifp) 960{ 961 /* NB: identify vap's by if_init */ 962 if (ifp->if_init == ieee80211_init && 963 (ifp->if_flags & IFF_UP) == 0) { 964 struct ieee80211vap *vap = ifp->if_softc; 965 966 IEEE80211_ADDR_COPY(vap->iv_myaddr, IF_LLADDR(ifp)); 967 } 968} 969 970/* 971 * Module glue. 972 * 973 * NB: the module name is "wlan" for compatibility with NetBSD. 974 */ 975static int 976wlan_modevent(module_t mod, int type, void *unused) 977{ 978 switch (type) { 979 case MOD_LOAD: 980 if (bootverbose) 981 printf("wlan: <802.11 Link Layer>\n"); 982 wlan_bpfevent = EVENTHANDLER_REGISTER(bpf_track, 983 bpf_track, 0, EVENTHANDLER_PRI_ANY); 984 wlan_ifllevent = EVENTHANDLER_REGISTER(iflladdr_event, 985 wlan_iflladdr, NULL, EVENTHANDLER_PRI_ANY); 986 wlan_cloner = if_clone_simple(wlanname, wlan_clone_create, 987 wlan_clone_destroy, 0); 988 return 0; 989 case MOD_UNLOAD: 990 if_clone_detach(wlan_cloner); 991 EVENTHANDLER_DEREGISTER(bpf_track, wlan_bpfevent); 992 EVENTHANDLER_DEREGISTER(iflladdr_event, wlan_ifllevent); 993 return 0; 994 } 995 return EINVAL; 996} 997 998static moduledata_t wlan_mod = { 999 wlanname, 1000 wlan_modevent, 1001 0 1002}; 1003DECLARE_MODULE(wlan, wlan_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST); 1004MODULE_VERSION(wlan, 1); 1005MODULE_DEPEND(wlan, ether, 1, 1, 1); 1006#ifdef IEEE80211_ALQ 1007MODULE_DEPEND(wlan, alq, 1, 1, 1); 1008#endif /* IEEE80211_ALQ */ 1009 1010