ieee80211_freebsd.c revision 343489
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 343489 2019-01-27 13:03:48Z 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 MALLOC_DEFINE(M_80211_COM, "80211com", "802.11 com state"); 70 71static const char wlanname[] = "wlan"; 72static struct if_clone *wlan_cloner; 73 74static int 75wlan_clone_create(struct if_clone *ifc, int unit, caddr_t params) 76{ 77 struct ieee80211_clone_params cp; 78 struct ieee80211vap *vap; 79 struct ieee80211com *ic; 80 int error; 81 82 error = copyin(params, &cp, sizeof(cp)); 83 if (error) 84 return error; 85 ic = ieee80211_find_com(cp.icp_parent); 86 if (ic == NULL) 87 return ENXIO; 88 if (cp.icp_opmode >= IEEE80211_OPMODE_MAX) { 89 ic_printf(ic, "%s: invalid opmode %d\n", __func__, 90 cp.icp_opmode); 91 return EINVAL; 92 } 93 if ((ic->ic_caps & ieee80211_opcap[cp.icp_opmode]) == 0) { 94 ic_printf(ic, "%s mode not supported\n", 95 ieee80211_opmode_name[cp.icp_opmode]); 96 return EOPNOTSUPP; 97 } 98 if ((cp.icp_flags & IEEE80211_CLONE_TDMA) && 99#ifdef IEEE80211_SUPPORT_TDMA 100 (ic->ic_caps & IEEE80211_C_TDMA) == 0 101#else 102 (1) 103#endif 104 ) { 105 ic_printf(ic, "TDMA not supported\n"); 106 return EOPNOTSUPP; 107 } 108 vap = ic->ic_vap_create(ic, wlanname, unit, 109 cp.icp_opmode, cp.icp_flags, cp.icp_bssid, 110 cp.icp_flags & IEEE80211_CLONE_MACADDR ? 111 cp.icp_macaddr : ic->ic_macaddr); 112 113 return (vap == NULL ? EIO : 0); 114} 115 116static void 117wlan_clone_destroy(struct ifnet *ifp) 118{ 119 struct ieee80211vap *vap = ifp->if_softc; 120 struct ieee80211com *ic = vap->iv_ic; 121 122 ic->ic_vap_delete(vap); 123} 124 125void 126ieee80211_vap_destroy(struct ieee80211vap *vap) 127{ 128 CURVNET_SET(vap->iv_ifp->if_vnet); 129 if_clone_destroyif(wlan_cloner, vap->iv_ifp); 130 CURVNET_RESTORE(); 131} 132 133int 134ieee80211_sysctl_msecs_ticks(SYSCTL_HANDLER_ARGS) 135{ 136 int msecs = ticks_to_msecs(*(int *)arg1); 137 int error, t; 138 139 error = sysctl_handle_int(oidp, &msecs, 0, req); 140 if (error || !req->newptr) 141 return error; 142 t = msecs_to_ticks(msecs); 143 *(int *)arg1 = (t < 1) ? 1 : t; 144 return 0; 145} 146 147static int 148ieee80211_sysctl_inact(SYSCTL_HANDLER_ARGS) 149{ 150 int inact = (*(int *)arg1) * IEEE80211_INACT_WAIT; 151 int error; 152 153 error = sysctl_handle_int(oidp, &inact, 0, req); 154 if (error || !req->newptr) 155 return error; 156 *(int *)arg1 = inact / IEEE80211_INACT_WAIT; 157 return 0; 158} 159 160static int 161ieee80211_sysctl_parent(SYSCTL_HANDLER_ARGS) 162{ 163 struct ieee80211com *ic = arg1; 164 165 return SYSCTL_OUT_STR(req, ic->ic_name); 166} 167 168static int 169ieee80211_sysctl_radar(SYSCTL_HANDLER_ARGS) 170{ 171 struct ieee80211com *ic = arg1; 172 int t = 0, error; 173 174 error = sysctl_handle_int(oidp, &t, 0, req); 175 if (error || !req->newptr) 176 return error; 177 IEEE80211_LOCK(ic); 178 ieee80211_dfs_notify_radar(ic, ic->ic_curchan); 179 IEEE80211_UNLOCK(ic); 180 return 0; 181} 182 183/* 184 * For now, just restart everything. 185 * 186 * Later on, it'd be nice to have a separate VAP restart to 187 * full-device restart. 188 */ 189static int 190ieee80211_sysctl_vap_restart(SYSCTL_HANDLER_ARGS) 191{ 192 struct ieee80211vap *vap = arg1; 193 int t = 0, error; 194 195 error = sysctl_handle_int(oidp, &t, 0, req); 196 if (error || !req->newptr) 197 return error; 198 199 ieee80211_restart_all(vap->iv_ic); 200 return 0; 201} 202 203void 204ieee80211_sysctl_attach(struct ieee80211com *ic) 205{ 206} 207 208void 209ieee80211_sysctl_detach(struct ieee80211com *ic) 210{ 211} 212 213void 214ieee80211_sysctl_vattach(struct ieee80211vap *vap) 215{ 216 struct ifnet *ifp = vap->iv_ifp; 217 struct sysctl_ctx_list *ctx; 218 struct sysctl_oid *oid; 219 char num[14]; /* sufficient for 32 bits */ 220 221 ctx = (struct sysctl_ctx_list *) IEEE80211_MALLOC(sizeof(struct sysctl_ctx_list), 222 M_DEVBUF, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 223 if (ctx == NULL) { 224 if_printf(ifp, "%s: cannot allocate sysctl context!\n", 225 __func__); 226 return; 227 } 228 sysctl_ctx_init(ctx); 229 snprintf(num, sizeof(num), "%u", ifp->if_dunit); 230 oid = SYSCTL_ADD_NODE(ctx, &SYSCTL_NODE_CHILDREN(_net, wlan), 231 OID_AUTO, num, CTLFLAG_RD, NULL, ""); 232 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 233 "%parent", CTLTYPE_STRING | CTLFLAG_RD, vap->iv_ic, 0, 234 ieee80211_sysctl_parent, "A", "parent device"); 235 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 236 "driver_caps", CTLFLAG_RW, &vap->iv_caps, 0, 237 "driver capabilities"); 238#ifdef IEEE80211_DEBUG 239 vap->iv_debug = ieee80211_debug; 240 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 241 "debug", CTLFLAG_RW, &vap->iv_debug, 0, 242 "control debugging printfs"); 243#endif 244 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 245 "bmiss_max", CTLFLAG_RW, &vap->iv_bmiss_max, 0, 246 "consecutive beacon misses before scanning"); 247 /* XXX inherit from tunables */ 248 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 249 "inact_run", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_run, 0, 250 ieee80211_sysctl_inact, "I", 251 "station inactivity timeout (sec)"); 252 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 253 "inact_probe", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_probe, 0, 254 ieee80211_sysctl_inact, "I", 255 "station inactivity probe timeout (sec)"); 256 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 257 "inact_auth", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_auth, 0, 258 ieee80211_sysctl_inact, "I", 259 "station authentication timeout (sec)"); 260 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 261 "inact_init", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_init, 0, 262 ieee80211_sysctl_inact, "I", 263 "station initial state timeout (sec)"); 264 if (vap->iv_htcaps & IEEE80211_HTC_HT) { 265 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 266 "ampdu_mintraffic_bk", CTLFLAG_RW, 267 &vap->iv_ampdu_mintraffic[WME_AC_BK], 0, 268 "BK traffic tx aggr threshold (pps)"); 269 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 270 "ampdu_mintraffic_be", CTLFLAG_RW, 271 &vap->iv_ampdu_mintraffic[WME_AC_BE], 0, 272 "BE traffic tx aggr threshold (pps)"); 273 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 274 "ampdu_mintraffic_vo", CTLFLAG_RW, 275 &vap->iv_ampdu_mintraffic[WME_AC_VO], 0, 276 "VO traffic tx aggr threshold (pps)"); 277 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 278 "ampdu_mintraffic_vi", CTLFLAG_RW, 279 &vap->iv_ampdu_mintraffic[WME_AC_VI], 0, 280 "VI traffic tx aggr threshold (pps)"); 281 } 282 283 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 284 "force_restart", CTLTYPE_INT | CTLFLAG_RW, vap, 0, 285 ieee80211_sysctl_vap_restart, "I", 286 "force a VAP restart"); 287 288 if (vap->iv_caps & IEEE80211_C_DFS) { 289 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 290 "radar", CTLTYPE_INT | CTLFLAG_RW, vap->iv_ic, 0, 291 ieee80211_sysctl_radar, "I", "simulate radar event"); 292 } 293 vap->iv_sysctl = ctx; 294 vap->iv_oid = oid; 295} 296 297void 298ieee80211_sysctl_vdetach(struct ieee80211vap *vap) 299{ 300 301 if (vap->iv_sysctl != NULL) { 302 sysctl_ctx_free(vap->iv_sysctl); 303 IEEE80211_FREE(vap->iv_sysctl, M_DEVBUF); 304 vap->iv_sysctl = NULL; 305 } 306} 307 308#define MS(_v, _f) (((_v) & _f##_M) >> _f##_S) 309int 310ieee80211_com_vincref(struct ieee80211vap *vap) 311{ 312 uint32_t ostate; 313 314 ostate = atomic_fetchadd_32(&vap->iv_com_state, IEEE80211_COM_REF_ADD); 315 316 if (ostate & IEEE80211_COM_DETACHED) { 317 atomic_subtract_32(&vap->iv_com_state, IEEE80211_COM_REF_ADD); 318 return (ENETDOWN); 319 } 320 321 if (MS(ostate, IEEE80211_COM_REF) == IEEE80211_COM_REF_MAX) { 322 atomic_subtract_32(&vap->iv_com_state, IEEE80211_COM_REF_ADD); 323 return (EOVERFLOW); 324 } 325 326 return (0); 327} 328 329void 330ieee80211_com_vdecref(struct ieee80211vap *vap) 331{ 332 uint32_t ostate; 333 334 ostate = atomic_fetchadd_32(&vap->iv_com_state, -IEEE80211_COM_REF_ADD); 335 336 KASSERT(MS(ostate, IEEE80211_COM_REF) != 0, 337 ("com reference counter underflow")); 338 339 (void) ostate; 340} 341 342void 343ieee80211_com_vdetach(struct ieee80211vap *vap) 344{ 345 int sleep_time; 346 347 sleep_time = msecs_to_ticks(250); 348 if (sleep_time == 0) 349 sleep_time = 1; 350 351 atomic_set_32(&vap->iv_com_state, IEEE80211_COM_DETACHED); 352 while (MS(atomic_load_32(&vap->iv_com_state), IEEE80211_COM_REF) != 0) 353 pause("comref", sleep_time); 354} 355#undef MS 356 357int 358ieee80211_node_dectestref(struct ieee80211_node *ni) 359{ 360 /* XXX need equivalent of atomic_dec_and_test */ 361 atomic_subtract_int(&ni->ni_refcnt, 1); 362 return atomic_cmpset_int(&ni->ni_refcnt, 0, 1); 363} 364 365void 366ieee80211_drain_ifq(struct ifqueue *ifq) 367{ 368 struct ieee80211_node *ni; 369 struct mbuf *m; 370 371 for (;;) { 372 IF_DEQUEUE(ifq, m); 373 if (m == NULL) 374 break; 375 376 ni = (struct ieee80211_node *)m->m_pkthdr.rcvif; 377 KASSERT(ni != NULL, ("frame w/o node")); 378 ieee80211_free_node(ni); 379 m->m_pkthdr.rcvif = NULL; 380 381 m_freem(m); 382 } 383} 384 385void 386ieee80211_flush_ifq(struct ifqueue *ifq, struct ieee80211vap *vap) 387{ 388 struct ieee80211_node *ni; 389 struct mbuf *m, **mprev; 390 391 IF_LOCK(ifq); 392 mprev = &ifq->ifq_head; 393 while ((m = *mprev) != NULL) { 394 ni = (struct ieee80211_node *)m->m_pkthdr.rcvif; 395 if (ni != NULL && ni->ni_vap == vap) { 396 *mprev = m->m_nextpkt; /* remove from list */ 397 ifq->ifq_len--; 398 399 m_freem(m); 400 ieee80211_free_node(ni); /* reclaim ref */ 401 } else 402 mprev = &m->m_nextpkt; 403 } 404 /* recalculate tail ptr */ 405 m = ifq->ifq_head; 406 for (; m != NULL && m->m_nextpkt != NULL; m = m->m_nextpkt) 407 ; 408 ifq->ifq_tail = m; 409 IF_UNLOCK(ifq); 410} 411 412/* 413 * As above, for mbufs allocated with m_gethdr/MGETHDR 414 * or initialized by M_COPY_PKTHDR. 415 */ 416#define MC_ALIGN(m, len) \ 417do { \ 418 (m)->m_data += rounddown2(MCLBYTES - (len), sizeof(long)); \ 419} while (/* CONSTCOND */ 0) 420 421/* 422 * Allocate and setup a management frame of the specified 423 * size. We return the mbuf and a pointer to the start 424 * of the contiguous data area that's been reserved based 425 * on the packet length. The data area is forced to 32-bit 426 * alignment and the buffer length to a multiple of 4 bytes. 427 * This is done mainly so beacon frames (that require this) 428 * can use this interface too. 429 */ 430struct mbuf * 431ieee80211_getmgtframe(uint8_t **frm, int headroom, int pktlen) 432{ 433 struct mbuf *m; 434 u_int len; 435 436 /* 437 * NB: we know the mbuf routines will align the data area 438 * so we don't need to do anything special. 439 */ 440 len = roundup2(headroom + pktlen, 4); 441 KASSERT(len <= MCLBYTES, ("802.11 mgt frame too large: %u", len)); 442 if (len < MINCLSIZE) { 443 m = m_gethdr(M_NOWAIT, MT_DATA); 444 /* 445 * Align the data in case additional headers are added. 446 * This should only happen when a WEP header is added 447 * which only happens for shared key authentication mgt 448 * frames which all fit in MHLEN. 449 */ 450 if (m != NULL) 451 M_ALIGN(m, len); 452 } else { 453 m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR); 454 if (m != NULL) 455 MC_ALIGN(m, len); 456 } 457 if (m != NULL) { 458 m->m_data += headroom; 459 *frm = m->m_data; 460 } 461 return m; 462} 463 464#ifndef __NO_STRICT_ALIGNMENT 465/* 466 * Re-align the payload in the mbuf. This is mainly used (right now) 467 * to handle IP header alignment requirements on certain architectures. 468 */ 469struct mbuf * 470ieee80211_realign(struct ieee80211vap *vap, struct mbuf *m, size_t align) 471{ 472 int pktlen, space; 473 struct mbuf *n; 474 475 pktlen = m->m_pkthdr.len; 476 space = pktlen + align; 477 if (space < MINCLSIZE) 478 n = m_gethdr(M_NOWAIT, MT_DATA); 479 else { 480 n = m_getjcl(M_NOWAIT, MT_DATA, M_PKTHDR, 481 space <= MCLBYTES ? MCLBYTES : 482#if MJUMPAGESIZE != MCLBYTES 483 space <= MJUMPAGESIZE ? MJUMPAGESIZE : 484#endif 485 space <= MJUM9BYTES ? MJUM9BYTES : MJUM16BYTES); 486 } 487 if (__predict_true(n != NULL)) { 488 m_move_pkthdr(n, m); 489 n->m_data = (caddr_t)(ALIGN(n->m_data + align) - align); 490 m_copydata(m, 0, pktlen, mtod(n, caddr_t)); 491 n->m_len = pktlen; 492 } else { 493 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 494 mtod(m, const struct ieee80211_frame *), NULL, 495 "%s", "no mbuf to realign"); 496 vap->iv_stats.is_rx_badalign++; 497 } 498 m_freem(m); 499 return n; 500} 501#endif /* !__NO_STRICT_ALIGNMENT */ 502 503int 504ieee80211_add_callback(struct mbuf *m, 505 void (*func)(struct ieee80211_node *, void *, int), void *arg) 506{ 507 struct m_tag *mtag; 508 struct ieee80211_cb *cb; 509 510 mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_CALLBACK, 511 sizeof(struct ieee80211_cb), M_NOWAIT); 512 if (mtag == NULL) 513 return 0; 514 515 cb = (struct ieee80211_cb *)(mtag+1); 516 cb->func = func; 517 cb->arg = arg; 518 m_tag_prepend(m, mtag); 519 m->m_flags |= M_TXCB; 520 return 1; 521} 522 523int 524ieee80211_add_xmit_params(struct mbuf *m, 525 const struct ieee80211_bpf_params *params) 526{ 527 struct m_tag *mtag; 528 struct ieee80211_tx_params *tx; 529 530 mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_XMIT_PARAMS, 531 sizeof(struct ieee80211_tx_params), M_NOWAIT); 532 if (mtag == NULL) 533 return (0); 534 535 tx = (struct ieee80211_tx_params *)(mtag+1); 536 memcpy(&tx->params, params, sizeof(struct ieee80211_bpf_params)); 537 m_tag_prepend(m, mtag); 538 return (1); 539} 540 541int 542ieee80211_get_xmit_params(struct mbuf *m, 543 struct ieee80211_bpf_params *params) 544{ 545 struct m_tag *mtag; 546 struct ieee80211_tx_params *tx; 547 548 mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_XMIT_PARAMS, 549 NULL); 550 if (mtag == NULL) 551 return (-1); 552 tx = (struct ieee80211_tx_params *)(mtag + 1); 553 memcpy(params, &tx->params, sizeof(struct ieee80211_bpf_params)); 554 return (0); 555} 556 557void 558ieee80211_process_callback(struct ieee80211_node *ni, 559 struct mbuf *m, int status) 560{ 561 struct m_tag *mtag; 562 563 mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_CALLBACK, NULL); 564 if (mtag != NULL) { 565 struct ieee80211_cb *cb = (struct ieee80211_cb *)(mtag+1); 566 cb->func(ni, cb->arg, status); 567 } 568} 569 570/* 571 * Add RX parameters to the given mbuf. 572 * 573 * Returns 1 if OK, 0 on error. 574 */ 575int 576ieee80211_add_rx_params(struct mbuf *m, const struct ieee80211_rx_stats *rxs) 577{ 578 struct m_tag *mtag; 579 struct ieee80211_rx_params *rx; 580 581 mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_RECV_PARAMS, 582 sizeof(struct ieee80211_rx_stats), M_NOWAIT); 583 if (mtag == NULL) 584 return (0); 585 586 rx = (struct ieee80211_rx_params *)(mtag + 1); 587 memcpy(&rx->params, rxs, sizeof(*rxs)); 588 m_tag_prepend(m, mtag); 589 return (1); 590} 591 592int 593ieee80211_get_rx_params(struct mbuf *m, struct ieee80211_rx_stats *rxs) 594{ 595 struct m_tag *mtag; 596 struct ieee80211_rx_params *rx; 597 598 mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_RECV_PARAMS, 599 NULL); 600 if (mtag == NULL) 601 return (-1); 602 rx = (struct ieee80211_rx_params *)(mtag + 1); 603 memcpy(rxs, &rx->params, sizeof(*rxs)); 604 return (0); 605} 606 607/* 608 * Transmit a frame to the parent interface. 609 */ 610int 611ieee80211_parent_xmitpkt(struct ieee80211com *ic, struct mbuf *m) 612{ 613 int error; 614 615 /* 616 * Assert the IC TX lock is held - this enforces the 617 * processing -> queuing order is maintained 618 */ 619 IEEE80211_TX_LOCK_ASSERT(ic); 620 error = ic->ic_transmit(ic, m); 621 if (error) { 622 struct ieee80211_node *ni; 623 624 ni = (struct ieee80211_node *)m->m_pkthdr.rcvif; 625 626 /* XXX number of fragments */ 627 if_inc_counter(ni->ni_vap->iv_ifp, IFCOUNTER_OERRORS, 1); 628 ieee80211_free_node(ni); 629 ieee80211_free_mbuf(m); 630 } 631 return (error); 632} 633 634/* 635 * Transmit a frame to the VAP interface. 636 */ 637int 638ieee80211_vap_xmitpkt(struct ieee80211vap *vap, struct mbuf *m) 639{ 640 struct ifnet *ifp = vap->iv_ifp; 641 642 /* 643 * When transmitting via the VAP, we shouldn't hold 644 * any IC TX lock as the VAP TX path will acquire it. 645 */ 646 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 647 648 return (ifp->if_transmit(ifp, m)); 649 650} 651 652#include <sys/libkern.h> 653 654void 655get_random_bytes(void *p, size_t n) 656{ 657 uint8_t *dp = p; 658 659 while (n > 0) { 660 uint32_t v = arc4random(); 661 size_t nb = n > sizeof(uint32_t) ? sizeof(uint32_t) : n; 662 bcopy(&v, dp, n > sizeof(uint32_t) ? sizeof(uint32_t) : n); 663 dp += sizeof(uint32_t), n -= nb; 664 } 665} 666 667/* 668 * Helper function for events that pass just a single mac address. 669 */ 670static void 671notify_macaddr(struct ifnet *ifp, int op, const uint8_t mac[IEEE80211_ADDR_LEN]) 672{ 673 struct ieee80211_join_event iev; 674 675 CURVNET_SET(ifp->if_vnet); 676 memset(&iev, 0, sizeof(iev)); 677 IEEE80211_ADDR_COPY(iev.iev_addr, mac); 678 rt_ieee80211msg(ifp, op, &iev, sizeof(iev)); 679 CURVNET_RESTORE(); 680} 681 682void 683ieee80211_notify_node_join(struct ieee80211_node *ni, int newassoc) 684{ 685 struct ieee80211vap *vap = ni->ni_vap; 686 struct ifnet *ifp = vap->iv_ifp; 687 688 CURVNET_SET_QUIET(ifp->if_vnet); 689 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode join", 690 (ni == vap->iv_bss) ? "bss " : ""); 691 692 if (ni == vap->iv_bss) { 693 notify_macaddr(ifp, newassoc ? 694 RTM_IEEE80211_ASSOC : RTM_IEEE80211_REASSOC, ni->ni_bssid); 695 if_link_state_change(ifp, LINK_STATE_UP); 696 } else { 697 notify_macaddr(ifp, newassoc ? 698 RTM_IEEE80211_JOIN : RTM_IEEE80211_REJOIN, ni->ni_macaddr); 699 } 700 CURVNET_RESTORE(); 701} 702 703void 704ieee80211_notify_node_leave(struct ieee80211_node *ni) 705{ 706 struct ieee80211vap *vap = ni->ni_vap; 707 struct ifnet *ifp = vap->iv_ifp; 708 709 CURVNET_SET_QUIET(ifp->if_vnet); 710 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode leave", 711 (ni == vap->iv_bss) ? "bss " : ""); 712 713 if (ni == vap->iv_bss) { 714 rt_ieee80211msg(ifp, RTM_IEEE80211_DISASSOC, NULL, 0); 715 if_link_state_change(ifp, LINK_STATE_DOWN); 716 } else { 717 /* fire off wireless event station leaving */ 718 notify_macaddr(ifp, RTM_IEEE80211_LEAVE, ni->ni_macaddr); 719 } 720 CURVNET_RESTORE(); 721} 722 723void 724ieee80211_notify_scan_done(struct ieee80211vap *vap) 725{ 726 struct ifnet *ifp = vap->iv_ifp; 727 728 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, "%s\n", "notify scan done"); 729 730 /* dispatch wireless event indicating scan completed */ 731 CURVNET_SET(ifp->if_vnet); 732 rt_ieee80211msg(ifp, RTM_IEEE80211_SCAN, NULL, 0); 733 CURVNET_RESTORE(); 734} 735 736void 737ieee80211_notify_replay_failure(struct ieee80211vap *vap, 738 const struct ieee80211_frame *wh, const struct ieee80211_key *k, 739 u_int64_t rsc, int tid) 740{ 741 struct ifnet *ifp = vap->iv_ifp; 742 743 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2, 744 "%s replay detected tid %d <rsc %ju, csc %ju, keyix %u rxkeyix %u>", 745 k->wk_cipher->ic_name, tid, (intmax_t) rsc, 746 (intmax_t) k->wk_keyrsc[tid], 747 k->wk_keyix, k->wk_rxkeyix); 748 749 if (ifp != NULL) { /* NB: for cipher test modules */ 750 struct ieee80211_replay_event iev; 751 752 IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1); 753 IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2); 754 iev.iev_cipher = k->wk_cipher->ic_cipher; 755 if (k->wk_rxkeyix != IEEE80211_KEYIX_NONE) 756 iev.iev_keyix = k->wk_rxkeyix; 757 else 758 iev.iev_keyix = k->wk_keyix; 759 iev.iev_keyrsc = k->wk_keyrsc[tid]; 760 iev.iev_rsc = rsc; 761 CURVNET_SET(ifp->if_vnet); 762 rt_ieee80211msg(ifp, RTM_IEEE80211_REPLAY, &iev, sizeof(iev)); 763 CURVNET_RESTORE(); 764 } 765} 766 767void 768ieee80211_notify_michael_failure(struct ieee80211vap *vap, 769 const struct ieee80211_frame *wh, u_int keyix) 770{ 771 struct ifnet *ifp = vap->iv_ifp; 772 773 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2, 774 "michael MIC verification failed <keyix %u>", keyix); 775 vap->iv_stats.is_rx_tkipmic++; 776 777 if (ifp != NULL) { /* NB: for cipher test modules */ 778 struct ieee80211_michael_event iev; 779 780 IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1); 781 IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2); 782 iev.iev_cipher = IEEE80211_CIPHER_TKIP; 783 iev.iev_keyix = keyix; 784 CURVNET_SET(ifp->if_vnet); 785 rt_ieee80211msg(ifp, RTM_IEEE80211_MICHAEL, &iev, sizeof(iev)); 786 CURVNET_RESTORE(); 787 } 788} 789 790void 791ieee80211_notify_wds_discover(struct ieee80211_node *ni) 792{ 793 struct ieee80211vap *vap = ni->ni_vap; 794 struct ifnet *ifp = vap->iv_ifp; 795 796 notify_macaddr(ifp, RTM_IEEE80211_WDS, ni->ni_macaddr); 797} 798 799void 800ieee80211_notify_csa(struct ieee80211com *ic, 801 const struct ieee80211_channel *c, int mode, int count) 802{ 803 struct ieee80211_csa_event iev; 804 struct ieee80211vap *vap; 805 struct ifnet *ifp; 806 807 memset(&iev, 0, sizeof(iev)); 808 iev.iev_flags = c->ic_flags; 809 iev.iev_freq = c->ic_freq; 810 iev.iev_ieee = c->ic_ieee; 811 iev.iev_mode = mode; 812 iev.iev_count = count; 813 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 814 ifp = vap->iv_ifp; 815 CURVNET_SET(ifp->if_vnet); 816 rt_ieee80211msg(ifp, RTM_IEEE80211_CSA, &iev, sizeof(iev)); 817 CURVNET_RESTORE(); 818 } 819} 820 821void 822ieee80211_notify_radar(struct ieee80211com *ic, 823 const struct ieee80211_channel *c) 824{ 825 struct ieee80211_radar_event iev; 826 struct ieee80211vap *vap; 827 struct ifnet *ifp; 828 829 memset(&iev, 0, sizeof(iev)); 830 iev.iev_flags = c->ic_flags; 831 iev.iev_freq = c->ic_freq; 832 iev.iev_ieee = c->ic_ieee; 833 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 834 ifp = vap->iv_ifp; 835 CURVNET_SET(ifp->if_vnet); 836 rt_ieee80211msg(ifp, RTM_IEEE80211_RADAR, &iev, sizeof(iev)); 837 CURVNET_RESTORE(); 838 } 839} 840 841void 842ieee80211_notify_cac(struct ieee80211com *ic, 843 const struct ieee80211_channel *c, enum ieee80211_notify_cac_event type) 844{ 845 struct ieee80211_cac_event iev; 846 struct ieee80211vap *vap; 847 struct ifnet *ifp; 848 849 memset(&iev, 0, sizeof(iev)); 850 iev.iev_flags = c->ic_flags; 851 iev.iev_freq = c->ic_freq; 852 iev.iev_ieee = c->ic_ieee; 853 iev.iev_type = type; 854 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 855 ifp = vap->iv_ifp; 856 CURVNET_SET(ifp->if_vnet); 857 rt_ieee80211msg(ifp, RTM_IEEE80211_CAC, &iev, sizeof(iev)); 858 CURVNET_RESTORE(); 859 } 860} 861 862void 863ieee80211_notify_node_deauth(struct ieee80211_node *ni) 864{ 865 struct ieee80211vap *vap = ni->ni_vap; 866 struct ifnet *ifp = vap->iv_ifp; 867 868 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node deauth"); 869 870 notify_macaddr(ifp, RTM_IEEE80211_DEAUTH, ni->ni_macaddr); 871} 872 873void 874ieee80211_notify_node_auth(struct ieee80211_node *ni) 875{ 876 struct ieee80211vap *vap = ni->ni_vap; 877 struct ifnet *ifp = vap->iv_ifp; 878 879 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node auth"); 880 881 notify_macaddr(ifp, RTM_IEEE80211_AUTH, ni->ni_macaddr); 882} 883 884void 885ieee80211_notify_country(struct ieee80211vap *vap, 886 const uint8_t bssid[IEEE80211_ADDR_LEN], const uint8_t cc[2]) 887{ 888 struct ifnet *ifp = vap->iv_ifp; 889 struct ieee80211_country_event iev; 890 891 memset(&iev, 0, sizeof(iev)); 892 IEEE80211_ADDR_COPY(iev.iev_addr, bssid); 893 iev.iev_cc[0] = cc[0]; 894 iev.iev_cc[1] = cc[1]; 895 CURVNET_SET(ifp->if_vnet); 896 rt_ieee80211msg(ifp, RTM_IEEE80211_COUNTRY, &iev, sizeof(iev)); 897 CURVNET_RESTORE(); 898} 899 900void 901ieee80211_notify_radio(struct ieee80211com *ic, int state) 902{ 903 struct ieee80211_radio_event iev; 904 struct ieee80211vap *vap; 905 struct ifnet *ifp; 906 907 memset(&iev, 0, sizeof(iev)); 908 iev.iev_state = state; 909 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 910 ifp = vap->iv_ifp; 911 CURVNET_SET(ifp->if_vnet); 912 rt_ieee80211msg(ifp, RTM_IEEE80211_RADIO, &iev, sizeof(iev)); 913 CURVNET_RESTORE(); 914 } 915} 916 917void 918ieee80211_load_module(const char *modname) 919{ 920 921#ifdef notyet 922 (void)kern_kldload(curthread, modname, NULL); 923#else 924 printf("%s: load the %s module by hand for now.\n", __func__, modname); 925#endif 926} 927 928static eventhandler_tag wlan_bpfevent; 929static eventhandler_tag wlan_ifllevent; 930 931static void 932bpf_track(void *arg, struct ifnet *ifp, int dlt, int attach) 933{ 934 /* NB: identify vap's by if_init */ 935 if (dlt == DLT_IEEE802_11_RADIO && 936 ifp->if_init == ieee80211_init) { 937 struct ieee80211vap *vap = ifp->if_softc; 938 /* 939 * Track bpf radiotap listener state. We mark the vap 940 * to indicate if any listener is present and the com 941 * to indicate if any listener exists on any associated 942 * vap. This flag is used by drivers to prepare radiotap 943 * state only when needed. 944 */ 945 if (attach) { 946 ieee80211_syncflag_ext(vap, IEEE80211_FEXT_BPF); 947 if (vap->iv_opmode == IEEE80211_M_MONITOR) 948 atomic_add_int(&vap->iv_ic->ic_montaps, 1); 949 } else if (!bpf_peers_present(vap->iv_rawbpf)) { 950 ieee80211_syncflag_ext(vap, -IEEE80211_FEXT_BPF); 951 if (vap->iv_opmode == IEEE80211_M_MONITOR) 952 atomic_subtract_int(&vap->iv_ic->ic_montaps, 1); 953 } 954 } 955} 956 957/* 958 * Change MAC address on the vap (if was not started). 959 */ 960static void 961wlan_iflladdr(void *arg __unused, struct ifnet *ifp) 962{ 963 /* NB: identify vap's by if_init */ 964 if (ifp->if_init == ieee80211_init && 965 (ifp->if_flags & IFF_UP) == 0) { 966 struct ieee80211vap *vap = ifp->if_softc; 967 968 IEEE80211_ADDR_COPY(vap->iv_myaddr, IF_LLADDR(ifp)); 969 } 970} 971 972/* 973 * Module glue. 974 * 975 * NB: the module name is "wlan" for compatibility with NetBSD. 976 */ 977static int 978wlan_modevent(module_t mod, int type, void *unused) 979{ 980 switch (type) { 981 case MOD_LOAD: 982 if (bootverbose) 983 printf("wlan: <802.11 Link Layer>\n"); 984 wlan_bpfevent = EVENTHANDLER_REGISTER(bpf_track, 985 bpf_track, 0, EVENTHANDLER_PRI_ANY); 986 wlan_ifllevent = EVENTHANDLER_REGISTER(iflladdr_event, 987 wlan_iflladdr, NULL, EVENTHANDLER_PRI_ANY); 988 wlan_cloner = if_clone_simple(wlanname, wlan_clone_create, 989 wlan_clone_destroy, 0); 990 return 0; 991 case MOD_UNLOAD: 992 if_clone_detach(wlan_cloner); 993 EVENTHANDLER_DEREGISTER(bpf_track, wlan_bpfevent); 994 EVENTHANDLER_DEREGISTER(iflladdr_event, wlan_ifllevent); 995 return 0; 996 } 997 return EINVAL; 998} 999 1000static moduledata_t wlan_mod = { 1001 wlanname, 1002 wlan_modevent, 1003 0 1004}; 1005DECLARE_MODULE(wlan, wlan_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST); 1006MODULE_VERSION(wlan, 1); 1007MODULE_DEPEND(wlan, ether, 1, 1, 1); 1008#ifdef IEEE80211_ALQ 1009MODULE_DEPEND(wlan, alq, 1, 1, 1); 1010#endif /* IEEE80211_ALQ */ 1011 1012