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("$FreeBSD$"); 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/kernel.h> 36 #include <sys/systm.h> 37 #include <sys/linker.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_var.h> 48 #include <net/if_dl.h> 49 #include <net/if_clone.h> 50 #include <net/if_media.h> 51 #include <net/if_types.h> 52 #include <net/ethernet.h> 53 #include <net/route.h> 54 #include <net/vnet.h> 55 56 #include <net80211/ieee80211_var.h> 57 #include <net80211/ieee80211_input.h> 58 59 SYSCTL_NODE(_net, OID_AUTO, wlan, CTLFLAG_RD, 0, "IEEE 80211 parameters"); 60 61 #ifdef IEEE80211_DEBUG 62 int ieee80211_debug = 0; 63 SYSCTL_INT(_net_wlan, OID_AUTO, debug, CTLFLAG_RW, &ieee80211_debug, 64 0, "debugging printfs"); 65 #endif 66 67 static MALLOC_DEFINE(M_80211_COM, "80211com", "802.11 com state"); 68 69 #if __FreeBSD_version >= 1000020 70 static const char wlanname[] = "wlan"; 71 static struct if_clone *wlan_cloner; 72 #endif 73 74 /* 75 * Allocate/free com structure in conjunction with ifnet; 76 * these routines are registered with if_register_com_alloc 77 * below and are called automatically by the ifnet code 78 * when the ifnet of the parent device is created. 79 */ 80 static void * 81 wlan_alloc(u_char type, struct ifnet *ifp) 82 { 83 struct ieee80211com *ic; 84 85 ic = malloc(sizeof(struct ieee80211com), M_80211_COM, M_WAITOK|M_ZERO); 86 ic->ic_ifp = ifp; 87 88 return (ic); 89 } 90 91 static void 92 wlan_free(void *ic, u_char type) 93 { 94 free(ic, M_80211_COM); 95 } 96 97 static int 98 wlan_clone_create(struct if_clone *ifc, int unit, caddr_t params) 99 { 100 struct ieee80211_clone_params cp; 101 struct ieee80211vap *vap; 102 struct ieee80211com *ic; 103 struct ifnet *ifp; 104 int error; 105 106 error = copyin(params, &cp, sizeof(cp)); 107 if (error) 108 return error; 109 ifp = ifunit(cp.icp_parent); 110 if (ifp == NULL) 111 return ENXIO; 112 /* XXX move printfs to DIAGNOSTIC before release */ 113 if (ifp->if_type != IFT_IEEE80211) { 114 if_printf(ifp, "%s: reject, not an 802.11 device\n", __func__); 115 return ENXIO; 116 } 117 if (cp.icp_opmode >= IEEE80211_OPMODE_MAX) { 118 if_printf(ifp, "%s: invalid opmode %d\n", 119 __func__, cp.icp_opmode); 120 return EINVAL; 121 } 122 ic = ifp->if_l2com; 123 if ((ic->ic_caps & ieee80211_opcap[cp.icp_opmode]) == 0) { 124 if_printf(ifp, "%s mode not supported\n", 125 ieee80211_opmode_name[cp.icp_opmode]); 126 return EOPNOTSUPP; 127 } 128 if ((cp.icp_flags & IEEE80211_CLONE_TDMA) && 129 #ifdef IEEE80211_SUPPORT_TDMA 130 (ic->ic_caps & IEEE80211_C_TDMA) == 0 131 #else 132 (1) 133 #endif 134 ) { 135 if_printf(ifp, "TDMA not supported\n"); 136 return EOPNOTSUPP; 137 } 138 #if __FreeBSD_version >= 1000020 139 vap = ic->ic_vap_create(ic, wlanname, unit, 140 cp.icp_opmode, cp.icp_flags, cp.icp_bssid, 141 cp.icp_flags & IEEE80211_CLONE_MACADDR ? 142 cp.icp_macaddr : (const uint8_t *)IF_LLADDR(ifp)); 143 #else 144 vap = ic->ic_vap_create(ic, ifc->ifc_name, unit, 145 cp.icp_opmode, cp.icp_flags, cp.icp_bssid, 146 cp.icp_flags & IEEE80211_CLONE_MACADDR ? 147 cp.icp_macaddr : (const uint8_t *)IF_LLADDR(ifp)); 148 149 #endif 150 151 return (vap == NULL ? EIO : 0); 152 } 153 154 static void 155 wlan_clone_destroy(struct ifnet *ifp) 156 { 157 struct ieee80211vap *vap = ifp->if_softc; 158 struct ieee80211com *ic = vap->iv_ic; 159 160 ic->ic_vap_delete(vap); 161 } 162 163 #if __FreeBSD_version < 1000020 164 IFC_SIMPLE_DECLARE(wlan, 0); 165 #endif 166 167 void 168 ieee80211_vap_destroy(struct ieee80211vap *vap) 169 { 170 CURVNET_SET(vap->iv_ifp->if_vnet); 171 #if __FreeBSD_version >= 1000020 172 if_clone_destroyif(wlan_cloner, vap->iv_ifp); 173 #else 174 if_clone_destroyif(&wlan_cloner, vap->iv_ifp); 175 #endif 176 CURVNET_RESTORE(); 177 } 178 179 int 180 ieee80211_sysctl_msecs_ticks(SYSCTL_HANDLER_ARGS) 181 { 182 int msecs = ticks_to_msecs(*(int *)arg1); 183 int error, t; 184 185 error = sysctl_handle_int(oidp, &msecs, 0, req); 186 if (error || !req->newptr) 187 return error; 188 t = msecs_to_ticks(msecs); 189 *(int *)arg1 = (t < 1) ? 1 : t; 190 return 0; 191 } 192 193 static int 194 ieee80211_sysctl_inact(SYSCTL_HANDLER_ARGS) 195 { 196 int inact = (*(int *)arg1) * IEEE80211_INACT_WAIT; 197 int error; 198 199 error = sysctl_handle_int(oidp, &inact, 0, req); 200 if (error || !req->newptr) 201 return error; 202 *(int *)arg1 = inact / IEEE80211_INACT_WAIT; 203 return 0; 204 } 205 206 static int 207 ieee80211_sysctl_parent(SYSCTL_HANDLER_ARGS) 208 { 209 struct ieee80211com *ic = arg1; 210 const char *name = ic->ic_ifp->if_xname; 211 212 return SYSCTL_OUT(req, name, strlen(name)); 213 } 214 215 static int 216 ieee80211_sysctl_radar(SYSCTL_HANDLER_ARGS) 217 { 218 struct ieee80211com *ic = arg1; 219 int t = 0, error; 220 221 error = sysctl_handle_int(oidp, &t, 0, req); 222 if (error || !req->newptr) 223 return error; 224 IEEE80211_LOCK(ic); 225 ieee80211_dfs_notify_radar(ic, ic->ic_curchan); 226 IEEE80211_UNLOCK(ic); 227 return 0; 228 } 229 230 void 231 ieee80211_sysctl_attach(struct ieee80211com *ic) 232 { 233 } 234 235 void 236 ieee80211_sysctl_detach(struct ieee80211com *ic) 237 { 238 } 239 240 void 241 ieee80211_sysctl_vattach(struct ieee80211vap *vap) 242 { 243 struct ifnet *ifp = vap->iv_ifp; 244 struct sysctl_ctx_list *ctx; 245 struct sysctl_oid *oid; 246 char num[14]; /* sufficient for 32 bits */ 247 248 ctx = (struct sysctl_ctx_list *) malloc(sizeof(struct sysctl_ctx_list), 249 M_DEVBUF, M_NOWAIT | M_ZERO); 250 if (ctx == NULL) { 251 if_printf(ifp, "%s: cannot allocate sysctl context!\n", 252 __func__); 253 return; 254 } 255 sysctl_ctx_init(ctx); 256 snprintf(num, sizeof(num), "%u", ifp->if_dunit); 257 oid = SYSCTL_ADD_NODE(ctx, &SYSCTL_NODE_CHILDREN(_net, wlan), 258 OID_AUTO, num, CTLFLAG_RD, NULL, ""); 259 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 260 "%parent", CTLTYPE_STRING | CTLFLAG_RD, vap->iv_ic, 0, 261 ieee80211_sysctl_parent, "A", "parent device"); 262 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 263 "driver_caps", CTLFLAG_RW, &vap->iv_caps, 0, 264 "driver capabilities"); 265 #ifdef IEEE80211_DEBUG 266 vap->iv_debug = ieee80211_debug; 267 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 268 "debug", CTLFLAG_RW, &vap->iv_debug, 0, 269 "control debugging printfs"); 270 #endif 271 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 272 "bmiss_max", CTLFLAG_RW, &vap->iv_bmiss_max, 0, 273 "consecutive beacon misses before scanning"); 274 /* XXX inherit from tunables */ 275 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 276 "inact_run", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_run, 0, 277 ieee80211_sysctl_inact, "I", 278 "station inactivity timeout (sec)"); 279 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 280 "inact_probe", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_probe, 0, 281 ieee80211_sysctl_inact, "I", 282 "station inactivity probe timeout (sec)"); 283 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 284 "inact_auth", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_auth, 0, 285 ieee80211_sysctl_inact, "I", 286 "station authentication timeout (sec)"); 287 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 288 "inact_init", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_init, 0, 289 ieee80211_sysctl_inact, "I", 290 "station initial state timeout (sec)"); 291 if (vap->iv_htcaps & IEEE80211_HTC_HT) { 292 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 293 "ampdu_mintraffic_bk", CTLFLAG_RW, 294 &vap->iv_ampdu_mintraffic[WME_AC_BK], 0, 295 "BK traffic tx aggr threshold (pps)"); 296 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 297 "ampdu_mintraffic_be", CTLFLAG_RW, 298 &vap->iv_ampdu_mintraffic[WME_AC_BE], 0, 299 "BE traffic tx aggr threshold (pps)"); 300 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 301 "ampdu_mintraffic_vo", CTLFLAG_RW, 302 &vap->iv_ampdu_mintraffic[WME_AC_VO], 0, 303 "VO traffic tx aggr threshold (pps)"); 304 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 305 "ampdu_mintraffic_vi", CTLFLAG_RW, 306 &vap->iv_ampdu_mintraffic[WME_AC_VI], 0, 307 "VI traffic tx aggr threshold (pps)"); 308 } 309 if (vap->iv_caps & IEEE80211_C_DFS) { 310 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 311 "radar", CTLTYPE_INT | CTLFLAG_RW, vap->iv_ic, 0, 312 ieee80211_sysctl_radar, "I", "simulate radar event"); 313 } 314 vap->iv_sysctl = ctx; 315 vap->iv_oid = oid; 316 } 317 318 void 319 ieee80211_sysctl_vdetach(struct ieee80211vap *vap) 320 { 321 322 if (vap->iv_sysctl != NULL) { 323 sysctl_ctx_free(vap->iv_sysctl); 324 free(vap->iv_sysctl, M_DEVBUF); 325 vap->iv_sysctl = NULL; 326 } 327 } 328 329 int 330 ieee80211_node_dectestref(struct ieee80211_node *ni) 331 { 332 /* XXX need equivalent of atomic_dec_and_test */ 333 atomic_subtract_int(&ni->ni_refcnt, 1); 334 return atomic_cmpset_int(&ni->ni_refcnt, 0, 1); 335 } 336 337 void 338 ieee80211_drain_ifq(struct ifqueue *ifq) 339 { 340 struct ieee80211_node *ni; 341 struct mbuf *m; 342 343 for (;;) { 344 IF_DEQUEUE(ifq, m); 345 if (m == NULL) 346 break; 347 348 ni = (struct ieee80211_node *)m->m_pkthdr.rcvif; 349 KASSERT(ni != NULL, ("frame w/o node")); 350 ieee80211_free_node(ni); 351 m->m_pkthdr.rcvif = NULL; 352 353 m_freem(m); 354 } 355 } 356 357 void 358 ieee80211_flush_ifq(struct ifqueue *ifq, struct ieee80211vap *vap) 359 { 360 struct ieee80211_node *ni; 361 struct mbuf *m, **mprev; 362 363 IF_LOCK(ifq); 364 mprev = &ifq->ifq_head; 365 while ((m = *mprev) != NULL) { 366 ni = (struct ieee80211_node *)m->m_pkthdr.rcvif; 367 if (ni != NULL && ni->ni_vap == vap) { 368 *mprev = m->m_nextpkt; /* remove from list */ 369 ifq->ifq_len--; 370 371 m_freem(m); 372 ieee80211_free_node(ni); /* reclaim ref */ 373 } else 374 mprev = &m->m_nextpkt; 375 } 376 /* recalculate tail ptr */ 377 m = ifq->ifq_head; 378 for (; m != NULL && m->m_nextpkt != NULL; m = m->m_nextpkt) 379 ; 380 ifq->ifq_tail = m; 381 IF_UNLOCK(ifq); 382 } 383 384 /* 385 * As above, for mbufs allocated with m_gethdr/MGETHDR 386 * or initialized by M_COPY_PKTHDR. 387 */ 388 #define MC_ALIGN(m, len) \ 389 do { \ 390 (m)->m_data += (MCLBYTES - (len)) &~ (sizeof(long) - 1); \ 391 } while (/* CONSTCOND */ 0) 392 393 /* 394 * Allocate and setup a management frame of the specified 395 * size. We return the mbuf and a pointer to the start 396 * of the contiguous data area that's been reserved based 397 * on the packet length. The data area is forced to 32-bit 398 * alignment and the buffer length to a multiple of 4 bytes. 399 * This is done mainly so beacon frames (that require this) 400 * can use this interface too. 401 */ 402 struct mbuf * 403 ieee80211_getmgtframe(uint8_t **frm, int headroom, int pktlen) 404 { 405 struct mbuf *m; 406 u_int len; 407 408 /* 409 * NB: we know the mbuf routines will align the data area 410 * so we don't need to do anything special. 411 */ 412 len = roundup2(headroom + pktlen, 4); 413 KASSERT(len <= MCLBYTES, ("802.11 mgt frame too large: %u", len)); 414 if (len < MINCLSIZE) { 415 m = m_gethdr(M_NOWAIT, MT_DATA); 416 /* 417 * Align the data in case additional headers are added. 418 * This should only happen when a WEP header is added 419 * which only happens for shared key authentication mgt 420 * frames which all fit in MHLEN. 421 */ 422 if (m != NULL) 423 MH_ALIGN(m, len); 424 } else { 425 m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR); 426 if (m != NULL) 427 MC_ALIGN(m, len); 428 } 429 if (m != NULL) { 430 m->m_data += headroom; 431 *frm = m->m_data; 432 } 433 return m; 434 } 435 436 #ifndef __NO_STRICT_ALIGNMENT 437 /* 438 * Re-align the payload in the mbuf. This is mainly used (right now) 439 * to handle IP header alignment requirements on certain architectures. 440 */ 441 struct mbuf * 442 ieee80211_realign(struct ieee80211vap *vap, struct mbuf *m, size_t align) 443 { 444 int pktlen, space; 445 struct mbuf *n; 446 447 pktlen = m->m_pkthdr.len; 448 space = pktlen + align; 449 if (space < MINCLSIZE) 450 n = m_gethdr(M_NOWAIT, MT_DATA); 451 else { 452 n = m_getjcl(M_NOWAIT, MT_DATA, M_PKTHDR, 453 space <= MCLBYTES ? MCLBYTES : 454 #if MJUMPAGESIZE != MCLBYTES 455 space <= MJUMPAGESIZE ? MJUMPAGESIZE : 456 #endif 457 space <= MJUM9BYTES ? MJUM9BYTES : MJUM16BYTES); 458 } 459 if (__predict_true(n != NULL)) { 460 m_move_pkthdr(n, m); 461 n->m_data = (caddr_t)(ALIGN(n->m_data + align) - align); 462 m_copydata(m, 0, pktlen, mtod(n, caddr_t)); 463 n->m_len = pktlen; 464 } else { 465 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 466 mtod(m, const struct ieee80211_frame *), NULL, 467 "%s", "no mbuf to realign"); 468 vap->iv_stats.is_rx_badalign++; 469 } 470 m_freem(m); 471 return n; 472 } 473 #endif /* !__NO_STRICT_ALIGNMENT */ 474 475 int 476 ieee80211_add_callback(struct mbuf *m, 477 void (*func)(struct ieee80211_node *, void *, int), void *arg) 478 { 479 struct m_tag *mtag; 480 struct ieee80211_cb *cb; 481 482 mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_CALLBACK, 483 sizeof(struct ieee80211_cb), M_NOWAIT); 484 if (mtag == NULL) 485 return 0; 486 487 cb = (struct ieee80211_cb *)(mtag+1); 488 cb->func = func; 489 cb->arg = arg; 490 m_tag_prepend(m, mtag); 491 m->m_flags |= M_TXCB; 492 return 1; 493 } 494 495 void 496 ieee80211_process_callback(struct ieee80211_node *ni, 497 struct mbuf *m, int status) 498 { 499 struct m_tag *mtag; 500 501 mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_CALLBACK, NULL); 502 if (mtag != NULL) { 503 struct ieee80211_cb *cb = (struct ieee80211_cb *)(mtag+1); 504 cb->func(ni, cb->arg, status); 505 } 506 } 507 508 /* 509 * Transmit a frame to the parent interface. 510 * 511 * TODO: if the transmission fails, make sure the parent node is freed 512 * (the callers will first need modifying.) 513 */ 514 int 515 ieee80211_parent_xmitpkt(struct ieee80211com *ic, 516 struct mbuf *m) 517 { 518 struct ifnet *parent = ic->ic_ifp; 519 /* 520 * Assert the IC TX lock is held - this enforces the 521 * processing -> queuing order is maintained 522 */ 523 IEEE80211_TX_LOCK_ASSERT(ic); 524 525 return (parent->if_transmit(parent, m)); 526 } 527 528 /* 529 * Transmit a frame to the VAP interface. 530 */ 531 int 532 ieee80211_vap_xmitpkt(struct ieee80211vap *vap, struct mbuf *m) 533 { 534 struct ifnet *ifp = vap->iv_ifp; 535 536 /* 537 * When transmitting via the VAP, we shouldn't hold 538 * any IC TX lock as the VAP TX path will acquire it. 539 */ 540 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 541 542 return (ifp->if_transmit(ifp, m)); 543 544 } 545 546 #include <sys/libkern.h> 547 548 void 549 get_random_bytes(void *p, size_t n) 550 { 551 uint8_t *dp = p; 552 553 while (n > 0) { 554 uint32_t v = arc4random(); 555 size_t nb = n > sizeof(uint32_t) ? sizeof(uint32_t) : n; 556 bcopy(&v, dp, n > sizeof(uint32_t) ? sizeof(uint32_t) : n); 557 dp += sizeof(uint32_t), n -= nb; 558 } 559 } 560 561 /* 562 * Helper function for events that pass just a single mac address. 563 */ 564 static void 565 notify_macaddr(struct ifnet *ifp, int op, const uint8_t mac[IEEE80211_ADDR_LEN]) 566 { 567 struct ieee80211_join_event iev; 568 569 CURVNET_SET(ifp->if_vnet); 570 memset(&iev, 0, sizeof(iev)); 571 IEEE80211_ADDR_COPY(iev.iev_addr, mac); 572 rt_ieee80211msg(ifp, op, &iev, sizeof(iev)); 573 CURVNET_RESTORE(); 574 } 575 576 void 577 ieee80211_notify_node_join(struct ieee80211_node *ni, int newassoc) 578 { 579 struct ieee80211vap *vap = ni->ni_vap; 580 struct ifnet *ifp = vap->iv_ifp; 581 582 CURVNET_SET_QUIET(ifp->if_vnet); 583 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode join", 584 (ni == vap->iv_bss) ? "bss " : ""); 585 586 if (ni == vap->iv_bss) { 587 notify_macaddr(ifp, newassoc ? 588 RTM_IEEE80211_ASSOC : RTM_IEEE80211_REASSOC, ni->ni_bssid); 589 if_link_state_change(ifp, LINK_STATE_UP); 590 } else { 591 notify_macaddr(ifp, newassoc ? 592 RTM_IEEE80211_JOIN : RTM_IEEE80211_REJOIN, ni->ni_macaddr); 593 } 594 CURVNET_RESTORE(); 595 } 596 597 void 598 ieee80211_notify_node_leave(struct ieee80211_node *ni) 599 { 600 struct ieee80211vap *vap = ni->ni_vap; 601 struct ifnet *ifp = vap->iv_ifp; 602 603 CURVNET_SET_QUIET(ifp->if_vnet); 604 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode leave", 605 (ni == vap->iv_bss) ? "bss " : ""); 606 607 if (ni == vap->iv_bss) { 608 rt_ieee80211msg(ifp, RTM_IEEE80211_DISASSOC, NULL, 0); 609 if_link_state_change(ifp, LINK_STATE_DOWN); 610 } else { 611 /* fire off wireless event station leaving */ 612 notify_macaddr(ifp, RTM_IEEE80211_LEAVE, ni->ni_macaddr); 613 } 614 CURVNET_RESTORE(); 615 } 616 617 void 618 ieee80211_notify_scan_done(struct ieee80211vap *vap) 619 { 620 struct ifnet *ifp = vap->iv_ifp; 621 622 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, "%s\n", "notify scan done"); 623 624 /* dispatch wireless event indicating scan completed */ 625 CURVNET_SET(ifp->if_vnet); 626 rt_ieee80211msg(ifp, RTM_IEEE80211_SCAN, NULL, 0); 627 CURVNET_RESTORE(); 628 } 629 630 void 631 ieee80211_notify_replay_failure(struct ieee80211vap *vap, 632 const struct ieee80211_frame *wh, const struct ieee80211_key *k, 633 u_int64_t rsc, int tid) 634 { 635 struct ifnet *ifp = vap->iv_ifp; 636 637 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2, 638 "%s replay detected tid %d <rsc %ju, csc %ju, keyix %u rxkeyix %u>", 639 k->wk_cipher->ic_name, tid, (intmax_t) rsc, 640 (intmax_t) k->wk_keyrsc[tid], 641 k->wk_keyix, k->wk_rxkeyix); 642 643 if (ifp != NULL) { /* NB: for cipher test modules */ 644 struct ieee80211_replay_event iev; 645 646 IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1); 647 IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2); 648 iev.iev_cipher = k->wk_cipher->ic_cipher; 649 if (k->wk_rxkeyix != IEEE80211_KEYIX_NONE) 650 iev.iev_keyix = k->wk_rxkeyix; 651 else 652 iev.iev_keyix = k->wk_keyix; 653 iev.iev_keyrsc = k->wk_keyrsc[tid]; 654 iev.iev_rsc = rsc; 655 CURVNET_SET(ifp->if_vnet); 656 rt_ieee80211msg(ifp, RTM_IEEE80211_REPLAY, &iev, sizeof(iev)); 657 CURVNET_RESTORE(); 658 } 659 } 660 661 void 662 ieee80211_notify_michael_failure(struct ieee80211vap *vap, 663 const struct ieee80211_frame *wh, u_int keyix) 664 { 665 struct ifnet *ifp = vap->iv_ifp; 666 667 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2, 668 "michael MIC verification failed <keyix %u>", keyix); 669 vap->iv_stats.is_rx_tkipmic++; 670 671 if (ifp != NULL) { /* NB: for cipher test modules */ 672 struct ieee80211_michael_event iev; 673 674 IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1); 675 IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2); 676 iev.iev_cipher = IEEE80211_CIPHER_TKIP; 677 iev.iev_keyix = keyix; 678 CURVNET_SET(ifp->if_vnet); 679 rt_ieee80211msg(ifp, RTM_IEEE80211_MICHAEL, &iev, sizeof(iev)); 680 CURVNET_RESTORE(); 681 } 682 } 683 684 void 685 ieee80211_notify_wds_discover(struct ieee80211_node *ni) 686 { 687 struct ieee80211vap *vap = ni->ni_vap; 688 struct ifnet *ifp = vap->iv_ifp; 689 690 notify_macaddr(ifp, RTM_IEEE80211_WDS, ni->ni_macaddr); 691 } 692 693 void 694 ieee80211_notify_csa(struct ieee80211com *ic, 695 const struct ieee80211_channel *c, int mode, int count) 696 { 697 struct ifnet *ifp = ic->ic_ifp; 698 struct ieee80211_csa_event iev; 699 700 memset(&iev, 0, sizeof(iev)); 701 iev.iev_flags = c->ic_flags; 702 iev.iev_freq = c->ic_freq; 703 iev.iev_ieee = c->ic_ieee; 704 iev.iev_mode = mode; 705 iev.iev_count = count; 706 CURVNET_SET(ifp->if_vnet); 707 rt_ieee80211msg(ifp, RTM_IEEE80211_CSA, &iev, sizeof(iev)); 708 CURVNET_RESTORE(); 709 } 710 711 void 712 ieee80211_notify_radar(struct ieee80211com *ic, 713 const struct ieee80211_channel *c) 714 { 715 struct ifnet *ifp = ic->ic_ifp; 716 struct ieee80211_radar_event iev; 717 718 memset(&iev, 0, sizeof(iev)); 719 iev.iev_flags = c->ic_flags; 720 iev.iev_freq = c->ic_freq; 721 iev.iev_ieee = c->ic_ieee; 722 CURVNET_SET(ifp->if_vnet); 723 rt_ieee80211msg(ifp, RTM_IEEE80211_RADAR, &iev, sizeof(iev)); 724 CURVNET_RESTORE(); 725 } 726 727 void 728 ieee80211_notify_cac(struct ieee80211com *ic, 729 const struct ieee80211_channel *c, enum ieee80211_notify_cac_event type) 730 { 731 struct ifnet *ifp = ic->ic_ifp; 732 struct ieee80211_cac_event iev; 733 734 memset(&iev, 0, sizeof(iev)); 735 iev.iev_flags = c->ic_flags; 736 iev.iev_freq = c->ic_freq; 737 iev.iev_ieee = c->ic_ieee; 738 iev.iev_type = type; 739 CURVNET_SET(ifp->if_vnet); 740 rt_ieee80211msg(ifp, RTM_IEEE80211_CAC, &iev, sizeof(iev)); 741 CURVNET_RESTORE(); 742 } 743 744 void 745 ieee80211_notify_node_deauth(struct ieee80211_node *ni) 746 { 747 struct ieee80211vap *vap = ni->ni_vap; 748 struct ifnet *ifp = vap->iv_ifp; 749 750 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node deauth"); 751 752 notify_macaddr(ifp, RTM_IEEE80211_DEAUTH, ni->ni_macaddr); 753 } 754 755 void 756 ieee80211_notify_node_auth(struct ieee80211_node *ni) 757 { 758 struct ieee80211vap *vap = ni->ni_vap; 759 struct ifnet *ifp = vap->iv_ifp; 760 761 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node auth"); 762 763 notify_macaddr(ifp, RTM_IEEE80211_AUTH, ni->ni_macaddr); 764 } 765 766 void 767 ieee80211_notify_country(struct ieee80211vap *vap, 768 const uint8_t bssid[IEEE80211_ADDR_LEN], const uint8_t cc[2]) 769 { 770 struct ifnet *ifp = vap->iv_ifp; 771 struct ieee80211_country_event iev; 772 773 memset(&iev, 0, sizeof(iev)); 774 IEEE80211_ADDR_COPY(iev.iev_addr, bssid); 775 iev.iev_cc[0] = cc[0]; 776 iev.iev_cc[1] = cc[1]; 777 CURVNET_SET(ifp->if_vnet); 778 rt_ieee80211msg(ifp, RTM_IEEE80211_COUNTRY, &iev, sizeof(iev)); 779 CURVNET_RESTORE(); 780 } 781 782 void 783 ieee80211_notify_radio(struct ieee80211com *ic, int state) 784 { 785 struct ifnet *ifp = ic->ic_ifp; 786 struct ieee80211_radio_event iev; 787 788 memset(&iev, 0, sizeof(iev)); 789 iev.iev_state = state; 790 CURVNET_SET(ifp->if_vnet); 791 rt_ieee80211msg(ifp, RTM_IEEE80211_RADIO, &iev, sizeof(iev)); 792 CURVNET_RESTORE(); 793 } 794 795 void 796 ieee80211_load_module(const char *modname) 797 { 798 799 #ifdef notyet 800 (void)kern_kldload(curthread, modname, NULL); 801 #else 802 printf("%s: load the %s module by hand for now.\n", __func__, modname); 803 #endif 804 } 805 806 static eventhandler_tag wlan_bpfevent; 807 static eventhandler_tag wlan_ifllevent; 808 809 static void 810 bpf_track(void *arg, struct ifnet *ifp, int dlt, int attach) 811 { 812 /* NB: identify vap's by if_init */ 813 if (dlt == DLT_IEEE802_11_RADIO && 814 ifp->if_init == ieee80211_init) { 815 struct ieee80211vap *vap = ifp->if_softc; 816 /* 817 * Track bpf radiotap listener state. We mark the vap 818 * to indicate if any listener is present and the com 819 * to indicate if any listener exists on any associated 820 * vap. This flag is used by drivers to prepare radiotap 821 * state only when needed. 822 */ 823 if (attach) { 824 ieee80211_syncflag_ext(vap, IEEE80211_FEXT_BPF); 825 if (vap->iv_opmode == IEEE80211_M_MONITOR) 826 atomic_add_int(&vap->iv_ic->ic_montaps, 1); 827 } else if (!bpf_peers_present(vap->iv_rawbpf)) { 828 ieee80211_syncflag_ext(vap, -IEEE80211_FEXT_BPF); 829 if (vap->iv_opmode == IEEE80211_M_MONITOR) 830 atomic_subtract_int(&vap->iv_ic->ic_montaps, 1); 831 } 832 } 833 } 834 835 static void 836 wlan_iflladdr(void *arg __unused, struct ifnet *ifp) 837 { 838 struct ieee80211com *ic = ifp->if_l2com; 839 struct ieee80211vap *vap, *next; 840 841 if (ifp->if_type != IFT_IEEE80211 || ic == NULL) 842 return; 843 844 IEEE80211_LOCK(ic); 845 TAILQ_FOREACH_SAFE(vap, &ic->ic_vaps, iv_next, next) { 846 /* 847 * If the MAC address has changed on the parent and it was 848 * copied to the vap on creation then re-sync. 849 */ 850 if (vap->iv_ic == ic && 851 (vap->iv_flags_ext & IEEE80211_FEXT_UNIQMAC) == 0) { 852 IEEE80211_ADDR_COPY(vap->iv_myaddr, IF_LLADDR(ifp)); 853 IEEE80211_UNLOCK(ic); 854 if_setlladdr(vap->iv_ifp, IF_LLADDR(ifp), 855 IEEE80211_ADDR_LEN); 856 IEEE80211_LOCK(ic); 857 } 858 } 859 IEEE80211_UNLOCK(ic); 860 } 861 862 /* 863 * Module glue. 864 * 865 * NB: the module name is "wlan" for compatibility with NetBSD. 866 */ 867 static int 868 wlan_modevent(module_t mod, int type, void *unused) 869 { 870 switch (type) { 871 case MOD_LOAD: 872 if (bootverbose) 873 printf("wlan: <802.11 Link Layer>\n"); 874 wlan_bpfevent = EVENTHANDLER_REGISTER(bpf_track, 875 bpf_track, 0, EVENTHANDLER_PRI_ANY); 876 if (wlan_bpfevent == NULL) 877 return ENOMEM; 878 wlan_ifllevent = EVENTHANDLER_REGISTER(iflladdr_event, 879 wlan_iflladdr, NULL, EVENTHANDLER_PRI_ANY); 880 if (wlan_ifllevent == NULL) { 881 EVENTHANDLER_DEREGISTER(bpf_track, wlan_bpfevent); 882 return ENOMEM; 883 } 884 #if __FreeBSD_version >= 1000020 885 wlan_cloner = if_clone_simple(wlanname, wlan_clone_create, 886 wlan_clone_destroy, 0); 887 #else 888 if_clone_attach(&wlan_cloner); 889 #endif 890 if_register_com_alloc(IFT_IEEE80211, wlan_alloc, wlan_free); 891 return 0; 892 case MOD_UNLOAD: 893 if_deregister_com_alloc(IFT_IEEE80211); 894 #if __FreeBSD_version >= 1000020 895 if_clone_detach(wlan_cloner); 896 #else 897 if_clone_detach(&wlan_cloner); 898 #endif 899 EVENTHANDLER_DEREGISTER(bpf_track, wlan_bpfevent); 900 EVENTHANDLER_DEREGISTER(iflladdr_event, wlan_ifllevent); 901 return 0; 902 } 903 return EINVAL; 904 } 905 906 static moduledata_t wlan_mod = { 907 #if __FreeBSD_version >= 1000020 908 wlanname, 909 #else 910 "wlan", 911 #endif 912 wlan_modevent, 913 0 914 }; 915 DECLARE_MODULE(wlan, wlan_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST); 916 MODULE_VERSION(wlan, 1); 917 MODULE_DEPEND(wlan, ether, 1, 1, 1); 918 #ifdef IEEE80211_ALQ 919 MODULE_DEPEND(wlan, alq, 1, 1, 1); 920 #endif /* IEEE80211_ALQ */ 921 922