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/eventhandler.h> 38 #include <sys/linker.h> 39 #include <sys/mbuf.h> 40 #include <sys/module.h> 41 #include <sys/proc.h> 42 #include <sys/sysctl.h> 43 44 #include <sys/socket.h> 45 46 #include <net/bpf.h> 47 #include <net/if.h> 48 #include <net/if_var.h> 49 #include <net/if_dl.h> 50 #include <net/if_clone.h> 51 #include <net/if_media.h> 52 #include <net/if_types.h> 53 #include <net/ethernet.h> 54 #include <net/route.h> 55 #include <net/vnet.h> 56 57 #include <net80211/ieee80211_var.h> 58 #include <net80211/ieee80211_input.h> 59 60 SYSCTL_NODE(_net, OID_AUTO, wlan, CTLFLAG_RD, 0, "IEEE 80211 parameters"); 61 62 #ifdef IEEE80211_DEBUG 63 int ieee80211_debug = 0; 64 SYSCTL_INT(_net_wlan, OID_AUTO, debug, CTLFLAG_RW, &ieee80211_debug, 65 0, "debugging printfs"); 66 #endif 67 68 static MALLOC_DEFINE(M_80211_COM, "80211com", "802.11 com state"); 69 70 static const char wlanname[] = "wlan"; 71 static struct if_clone *wlan_cloner; 72 73 static int 74 wlan_clone_create(struct if_clone *ifc, int unit, caddr_t params) 75 { 76 struct ieee80211_clone_params cp; 77 struct ieee80211vap *vap; 78 struct ieee80211com *ic; 79 int error; 80 81 error = copyin(params, &cp, sizeof(cp)); 82 if (error) 83 return error; 84 ic = ieee80211_find_com(cp.icp_parent); 85 if (ic == NULL) 86 return ENXIO; 87 if (cp.icp_opmode >= IEEE80211_OPMODE_MAX) { 88 ic_printf(ic, "%s: invalid opmode %d\n", __func__, 89 cp.icp_opmode); 90 return EINVAL; 91 } 92 if ((ic->ic_caps & ieee80211_opcap[cp.icp_opmode]) == 0) { 93 ic_printf(ic, "%s mode not supported\n", 94 ieee80211_opmode_name[cp.icp_opmode]); 95 return EOPNOTSUPP; 96 } 97 if ((cp.icp_flags & IEEE80211_CLONE_TDMA) && 98 #ifdef IEEE80211_SUPPORT_TDMA 99 (ic->ic_caps & IEEE80211_C_TDMA) == 0 100 #else 101 (1) 102 #endif 103 ) { 104 ic_printf(ic, "TDMA not supported\n"); 105 return EOPNOTSUPP; 106 } 107 vap = ic->ic_vap_create(ic, wlanname, unit, 108 cp.icp_opmode, cp.icp_flags, cp.icp_bssid, 109 cp.icp_flags & IEEE80211_CLONE_MACADDR ? 110 cp.icp_macaddr : ic->ic_macaddr); 111 112 return (vap == NULL ? EIO : 0); 113 } 114 115 static void 116 wlan_clone_destroy(struct ifnet *ifp) 117 { 118 struct ieee80211vap *vap = ifp->if_softc; 119 struct ieee80211com *ic = vap->iv_ic; 120 121 ic->ic_vap_delete(vap); 122 } 123 124 void 125 ieee80211_vap_destroy(struct ieee80211vap *vap) 126 { 127 CURVNET_SET(vap->iv_ifp->if_vnet); 128 if_clone_destroyif(wlan_cloner, vap->iv_ifp); 129 CURVNET_RESTORE(); 130 } 131 132 int 133 ieee80211_sysctl_msecs_ticks(SYSCTL_HANDLER_ARGS) 134 { 135 int msecs = ticks_to_msecs(*(int *)arg1); 136 int error, t; 137 138 error = sysctl_handle_int(oidp, &msecs, 0, req); 139 if (error || !req->newptr) 140 return error; 141 t = msecs_to_ticks(msecs); 142 *(int *)arg1 = (t < 1) ? 1 : t; 143 return 0; 144 } 145 146 static int 147 ieee80211_sysctl_inact(SYSCTL_HANDLER_ARGS) 148 { 149 int inact = (*(int *)arg1) * IEEE80211_INACT_WAIT; 150 int error; 151 152 error = sysctl_handle_int(oidp, &inact, 0, req); 153 if (error || !req->newptr) 154 return error; 155 *(int *)arg1 = inact / IEEE80211_INACT_WAIT; 156 return 0; 157 } 158 159 static int 160 ieee80211_sysctl_parent(SYSCTL_HANDLER_ARGS) 161 { 162 struct ieee80211com *ic = arg1; 163 164 return SYSCTL_OUT_STR(req, ic->ic_name); 165 } 166 167 static int 168 ieee80211_sysctl_radar(SYSCTL_HANDLER_ARGS) 169 { 170 struct ieee80211com *ic = arg1; 171 int t = 0, error; 172 173 error = sysctl_handle_int(oidp, &t, 0, req); 174 if (error || !req->newptr) 175 return error; 176 IEEE80211_LOCK(ic); 177 ieee80211_dfs_notify_radar(ic, ic->ic_curchan); 178 IEEE80211_UNLOCK(ic); 179 return 0; 180 } 181 182 void 183 ieee80211_sysctl_attach(struct ieee80211com *ic) 184 { 185 } 186 187 void 188 ieee80211_sysctl_detach(struct ieee80211com *ic) 189 { 190 } 191 192 void 193 ieee80211_sysctl_vattach(struct ieee80211vap *vap) 194 { 195 struct ifnet *ifp = vap->iv_ifp; 196 struct sysctl_ctx_list *ctx; 197 struct sysctl_oid *oid; 198 char num[14]; /* sufficient for 32 bits */ 199 200 ctx = (struct sysctl_ctx_list *) IEEE80211_MALLOC(sizeof(struct sysctl_ctx_list), 201 M_DEVBUF, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 202 if (ctx == NULL) { 203 if_printf(ifp, "%s: cannot allocate sysctl context!\n", 204 __func__); 205 return; 206 } 207 sysctl_ctx_init(ctx); 208 snprintf(num, sizeof(num), "%u", ifp->if_dunit); 209 oid = SYSCTL_ADD_NODE(ctx, &SYSCTL_NODE_CHILDREN(_net, wlan), 210 OID_AUTO, num, CTLFLAG_RD, NULL, ""); 211 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 212 "%parent", CTLTYPE_STRING | CTLFLAG_RD, vap->iv_ic, 0, 213 ieee80211_sysctl_parent, "A", "parent device"); 214 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 215 "driver_caps", CTLFLAG_RW, &vap->iv_caps, 0, 216 "driver capabilities"); 217 #ifdef IEEE80211_DEBUG 218 vap->iv_debug = ieee80211_debug; 219 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 220 "debug", CTLFLAG_RW, &vap->iv_debug, 0, 221 "control debugging printfs"); 222 #endif 223 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 224 "bmiss_max", CTLFLAG_RW, &vap->iv_bmiss_max, 0, 225 "consecutive beacon misses before scanning"); 226 /* XXX inherit from tunables */ 227 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 228 "inact_run", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_run, 0, 229 ieee80211_sysctl_inact, "I", 230 "station inactivity timeout (sec)"); 231 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 232 "inact_probe", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_probe, 0, 233 ieee80211_sysctl_inact, "I", 234 "station inactivity probe timeout (sec)"); 235 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 236 "inact_auth", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_auth, 0, 237 ieee80211_sysctl_inact, "I", 238 "station authentication timeout (sec)"); 239 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 240 "inact_init", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_init, 0, 241 ieee80211_sysctl_inact, "I", 242 "station initial state timeout (sec)"); 243 if (vap->iv_htcaps & IEEE80211_HTC_HT) { 244 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 245 "ampdu_mintraffic_bk", CTLFLAG_RW, 246 &vap->iv_ampdu_mintraffic[WME_AC_BK], 0, 247 "BK traffic tx aggr threshold (pps)"); 248 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 249 "ampdu_mintraffic_be", CTLFLAG_RW, 250 &vap->iv_ampdu_mintraffic[WME_AC_BE], 0, 251 "BE traffic tx aggr threshold (pps)"); 252 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 253 "ampdu_mintraffic_vo", CTLFLAG_RW, 254 &vap->iv_ampdu_mintraffic[WME_AC_VO], 0, 255 "VO traffic tx aggr threshold (pps)"); 256 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 257 "ampdu_mintraffic_vi", CTLFLAG_RW, 258 &vap->iv_ampdu_mintraffic[WME_AC_VI], 0, 259 "VI traffic tx aggr threshold (pps)"); 260 } 261 if (vap->iv_caps & IEEE80211_C_DFS) { 262 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 263 "radar", CTLTYPE_INT | CTLFLAG_RW, vap->iv_ic, 0, 264 ieee80211_sysctl_radar, "I", "simulate radar event"); 265 } 266 vap->iv_sysctl = ctx; 267 vap->iv_oid = oid; 268 } 269 270 void 271 ieee80211_sysctl_vdetach(struct ieee80211vap *vap) 272 { 273 274 if (vap->iv_sysctl != NULL) { 275 sysctl_ctx_free(vap->iv_sysctl); 276 IEEE80211_FREE(vap->iv_sysctl, M_DEVBUF); 277 vap->iv_sysctl = NULL; 278 } 279 } 280 281 int 282 ieee80211_node_dectestref(struct ieee80211_node *ni) 283 { 284 /* XXX need equivalent of atomic_dec_and_test */ 285 atomic_subtract_int(&ni->ni_refcnt, 1); 286 return atomic_cmpset_int(&ni->ni_refcnt, 0, 1); 287 } 288 289 void 290 ieee80211_drain_ifq(struct ifqueue *ifq) 291 { 292 struct ieee80211_node *ni; 293 struct mbuf *m; 294 295 for (;;) { 296 IF_DEQUEUE(ifq, m); 297 if (m == NULL) 298 break; 299 300 ni = (struct ieee80211_node *)m->m_pkthdr.rcvif; 301 KASSERT(ni != NULL, ("frame w/o node")); 302 ieee80211_free_node(ni); 303 m->m_pkthdr.rcvif = NULL; 304 305 m_freem(m); 306 } 307 } 308 309 void 310 ieee80211_flush_ifq(struct ifqueue *ifq, struct ieee80211vap *vap) 311 { 312 struct ieee80211_node *ni; 313 struct mbuf *m, **mprev; 314 315 IF_LOCK(ifq); 316 mprev = &ifq->ifq_head; 317 while ((m = *mprev) != NULL) { 318 ni = (struct ieee80211_node *)m->m_pkthdr.rcvif; 319 if (ni != NULL && ni->ni_vap == vap) { 320 *mprev = m->m_nextpkt; /* remove from list */ 321 ifq->ifq_len--; 322 323 m_freem(m); 324 ieee80211_free_node(ni); /* reclaim ref */ 325 } else 326 mprev = &m->m_nextpkt; 327 } 328 /* recalculate tail ptr */ 329 m = ifq->ifq_head; 330 for (; m != NULL && m->m_nextpkt != NULL; m = m->m_nextpkt) 331 ; 332 ifq->ifq_tail = m; 333 IF_UNLOCK(ifq); 334 } 335 336 /* 337 * As above, for mbufs allocated with m_gethdr/MGETHDR 338 * or initialized by M_COPY_PKTHDR. 339 */ 340 #define MC_ALIGN(m, len) \ 341 do { \ 342 (m)->m_data += (MCLBYTES - (len)) &~ (sizeof(long) - 1); \ 343 } while (/* CONSTCOND */ 0) 344 345 /* 346 * Allocate and setup a management frame of the specified 347 * size. We return the mbuf and a pointer to the start 348 * of the contiguous data area that's been reserved based 349 * on the packet length. The data area is forced to 32-bit 350 * alignment and the buffer length to a multiple of 4 bytes. 351 * This is done mainly so beacon frames (that require this) 352 * can use this interface too. 353 */ 354 struct mbuf * 355 ieee80211_getmgtframe(uint8_t **frm, int headroom, int pktlen) 356 { 357 struct mbuf *m; 358 u_int len; 359 360 /* 361 * NB: we know the mbuf routines will align the data area 362 * so we don't need to do anything special. 363 */ 364 len = roundup2(headroom + pktlen, 4); 365 KASSERT(len <= MCLBYTES, ("802.11 mgt frame too large: %u", len)); 366 if (len < MINCLSIZE) { 367 m = m_gethdr(M_NOWAIT, MT_DATA); 368 /* 369 * Align the data in case additional headers are added. 370 * This should only happen when a WEP header is added 371 * which only happens for shared key authentication mgt 372 * frames which all fit in MHLEN. 373 */ 374 if (m != NULL) 375 M_ALIGN(m, len); 376 } else { 377 m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR); 378 if (m != NULL) 379 MC_ALIGN(m, len); 380 } 381 if (m != NULL) { 382 m->m_data += headroom; 383 *frm = m->m_data; 384 } 385 return m; 386 } 387 388 #ifndef __NO_STRICT_ALIGNMENT 389 /* 390 * Re-align the payload in the mbuf. This is mainly used (right now) 391 * to handle IP header alignment requirements on certain architectures. 392 */ 393 struct mbuf * 394 ieee80211_realign(struct ieee80211vap *vap, struct mbuf *m, size_t align) 395 { 396 int pktlen, space; 397 struct mbuf *n; 398 399 pktlen = m->m_pkthdr.len; 400 space = pktlen + align; 401 if (space < MINCLSIZE) 402 n = m_gethdr(M_NOWAIT, MT_DATA); 403 else { 404 n = m_getjcl(M_NOWAIT, MT_DATA, M_PKTHDR, 405 space <= MCLBYTES ? MCLBYTES : 406 #if MJUMPAGESIZE != MCLBYTES 407 space <= MJUMPAGESIZE ? MJUMPAGESIZE : 408 #endif 409 space <= MJUM9BYTES ? MJUM9BYTES : MJUM16BYTES); 410 } 411 if (__predict_true(n != NULL)) { 412 m_move_pkthdr(n, m); 413 n->m_data = (caddr_t)(ALIGN(n->m_data + align) - align); 414 m_copydata(m, 0, pktlen, mtod(n, caddr_t)); 415 n->m_len = pktlen; 416 } else { 417 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 418 mtod(m, const struct ieee80211_frame *), NULL, 419 "%s", "no mbuf to realign"); 420 vap->iv_stats.is_rx_badalign++; 421 } 422 m_freem(m); 423 return n; 424 } 425 #endif /* !__NO_STRICT_ALIGNMENT */ 426 427 int 428 ieee80211_add_callback(struct mbuf *m, 429 void (*func)(struct ieee80211_node *, void *, int), void *arg) 430 { 431 struct m_tag *mtag; 432 struct ieee80211_cb *cb; 433 434 mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_CALLBACK, 435 sizeof(struct ieee80211_cb), M_NOWAIT); 436 if (mtag == NULL) 437 return 0; 438 439 cb = (struct ieee80211_cb *)(mtag+1); 440 cb->func = func; 441 cb->arg = arg; 442 m_tag_prepend(m, mtag); 443 m->m_flags |= M_TXCB; 444 return 1; 445 } 446 447 int 448 ieee80211_add_xmit_params(struct mbuf *m, 449 const struct ieee80211_bpf_params *params) 450 { 451 struct m_tag *mtag; 452 struct ieee80211_tx_params *tx; 453 454 mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_XMIT_PARAMS, 455 sizeof(struct ieee80211_tx_params), M_NOWAIT); 456 if (mtag == NULL) 457 return (0); 458 459 tx = (struct ieee80211_tx_params *)(mtag+1); 460 memcpy(&tx->params, params, sizeof(struct ieee80211_bpf_params)); 461 m_tag_prepend(m, mtag); 462 return (1); 463 } 464 465 int 466 ieee80211_get_xmit_params(struct mbuf *m, 467 struct ieee80211_bpf_params *params) 468 { 469 struct m_tag *mtag; 470 struct ieee80211_tx_params *tx; 471 472 mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_XMIT_PARAMS, 473 NULL); 474 if (mtag == NULL) 475 return (-1); 476 tx = (struct ieee80211_tx_params *)(mtag + 1); 477 memcpy(params, &tx->params, sizeof(struct ieee80211_bpf_params)); 478 return (0); 479 } 480 481 void 482 ieee80211_process_callback(struct ieee80211_node *ni, 483 struct mbuf *m, int status) 484 { 485 struct m_tag *mtag; 486 487 mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_CALLBACK, NULL); 488 if (mtag != NULL) { 489 struct ieee80211_cb *cb = (struct ieee80211_cb *)(mtag+1); 490 cb->func(ni, cb->arg, status); 491 } 492 } 493 494 /* 495 * Add RX parameters to the given mbuf. 496 * 497 * Returns 1 if OK, 0 on error. 498 */ 499 int 500 ieee80211_add_rx_params(struct mbuf *m, const struct ieee80211_rx_stats *rxs) 501 { 502 struct m_tag *mtag; 503 struct ieee80211_rx_params *rx; 504 505 mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_RECV_PARAMS, 506 sizeof(struct ieee80211_rx_stats), M_NOWAIT); 507 if (mtag == NULL) 508 return (0); 509 510 rx = (struct ieee80211_rx_params *)(mtag + 1); 511 memcpy(&rx->params, rxs, sizeof(*rxs)); 512 m_tag_prepend(m, mtag); 513 return (1); 514 } 515 516 int 517 ieee80211_get_rx_params(struct mbuf *m, struct ieee80211_rx_stats *rxs) 518 { 519 struct m_tag *mtag; 520 struct ieee80211_rx_params *rx; 521 522 mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_RECV_PARAMS, 523 NULL); 524 if (mtag == NULL) 525 return (-1); 526 rx = (struct ieee80211_rx_params *)(mtag + 1); 527 memcpy(rxs, &rx->params, sizeof(*rxs)); 528 return (0); 529 } 530 531 /* 532 * Transmit a frame to the parent interface. 533 */ 534 int 535 ieee80211_parent_xmitpkt(struct ieee80211com *ic, struct mbuf *m) 536 { 537 int error; 538 539 /* 540 * Assert the IC TX lock is held - this enforces the 541 * processing -> queuing order is maintained 542 */ 543 IEEE80211_TX_LOCK_ASSERT(ic); 544 error = ic->ic_transmit(ic, m); 545 if (error) { 546 struct ieee80211_node *ni; 547 548 ni = (struct ieee80211_node *)m->m_pkthdr.rcvif; 549 550 /* XXX number of fragments */ 551 if_inc_counter(ni->ni_vap->iv_ifp, IFCOUNTER_OERRORS, 1); 552 ieee80211_free_node(ni); 553 ieee80211_free_mbuf(m); 554 } 555 return (error); 556 } 557 558 /* 559 * Transmit a frame to the VAP interface. 560 */ 561 int 562 ieee80211_vap_xmitpkt(struct ieee80211vap *vap, struct mbuf *m) 563 { 564 struct ifnet *ifp = vap->iv_ifp; 565 566 /* 567 * When transmitting via the VAP, we shouldn't hold 568 * any IC TX lock as the VAP TX path will acquire it. 569 */ 570 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 571 572 return (ifp->if_transmit(ifp, m)); 573 574 } 575 576 #include <sys/libkern.h> 577 578 void 579 get_random_bytes(void *p, size_t n) 580 { 581 uint8_t *dp = p; 582 583 while (n > 0) { 584 uint32_t v = arc4random(); 585 size_t nb = n > sizeof(uint32_t) ? sizeof(uint32_t) : n; 586 bcopy(&v, dp, n > sizeof(uint32_t) ? sizeof(uint32_t) : n); 587 dp += sizeof(uint32_t), n -= nb; 588 } 589 } 590 591 /* 592 * Helper function for events that pass just a single mac address. 593 */ 594 static void 595 notify_macaddr(struct ifnet *ifp, int op, const uint8_t mac[IEEE80211_ADDR_LEN]) 596 { 597 struct ieee80211_join_event iev; 598 599 CURVNET_SET(ifp->if_vnet); 600 memset(&iev, 0, sizeof(iev)); 601 IEEE80211_ADDR_COPY(iev.iev_addr, mac); 602 rt_ieee80211msg(ifp, op, &iev, sizeof(iev)); 603 CURVNET_RESTORE(); 604 } 605 606 void 607 ieee80211_notify_node_join(struct ieee80211_node *ni, int newassoc) 608 { 609 struct ieee80211vap *vap = ni->ni_vap; 610 struct ifnet *ifp = vap->iv_ifp; 611 612 CURVNET_SET_QUIET(ifp->if_vnet); 613 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode join", 614 (ni == vap->iv_bss) ? "bss " : ""); 615 616 if (ni == vap->iv_bss) { 617 notify_macaddr(ifp, newassoc ? 618 RTM_IEEE80211_ASSOC : RTM_IEEE80211_REASSOC, ni->ni_bssid); 619 if_link_state_change(ifp, LINK_STATE_UP); 620 } else { 621 notify_macaddr(ifp, newassoc ? 622 RTM_IEEE80211_JOIN : RTM_IEEE80211_REJOIN, ni->ni_macaddr); 623 } 624 CURVNET_RESTORE(); 625 } 626 627 void 628 ieee80211_notify_node_leave(struct ieee80211_node *ni) 629 { 630 struct ieee80211vap *vap = ni->ni_vap; 631 struct ifnet *ifp = vap->iv_ifp; 632 633 CURVNET_SET_QUIET(ifp->if_vnet); 634 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode leave", 635 (ni == vap->iv_bss) ? "bss " : ""); 636 637 if (ni == vap->iv_bss) { 638 rt_ieee80211msg(ifp, RTM_IEEE80211_DISASSOC, NULL, 0); 639 if_link_state_change(ifp, LINK_STATE_DOWN); 640 } else { 641 /* fire off wireless event station leaving */ 642 notify_macaddr(ifp, RTM_IEEE80211_LEAVE, ni->ni_macaddr); 643 } 644 CURVNET_RESTORE(); 645 } 646 647 void 648 ieee80211_notify_scan_done(struct ieee80211vap *vap) 649 { 650 struct ifnet *ifp = vap->iv_ifp; 651 652 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, "%s\n", "notify scan done"); 653 654 /* dispatch wireless event indicating scan completed */ 655 CURVNET_SET(ifp->if_vnet); 656 rt_ieee80211msg(ifp, RTM_IEEE80211_SCAN, NULL, 0); 657 CURVNET_RESTORE(); 658 } 659 660 void 661 ieee80211_notify_replay_failure(struct ieee80211vap *vap, 662 const struct ieee80211_frame *wh, const struct ieee80211_key *k, 663 u_int64_t rsc, int tid) 664 { 665 struct ifnet *ifp = vap->iv_ifp; 666 667 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2, 668 "%s replay detected tid %d <rsc %ju, csc %ju, keyix %u rxkeyix %u>", 669 k->wk_cipher->ic_name, tid, (intmax_t) rsc, 670 (intmax_t) k->wk_keyrsc[tid], 671 k->wk_keyix, k->wk_rxkeyix); 672 673 if (ifp != NULL) { /* NB: for cipher test modules */ 674 struct ieee80211_replay_event iev; 675 676 IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1); 677 IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2); 678 iev.iev_cipher = k->wk_cipher->ic_cipher; 679 if (k->wk_rxkeyix != IEEE80211_KEYIX_NONE) 680 iev.iev_keyix = k->wk_rxkeyix; 681 else 682 iev.iev_keyix = k->wk_keyix; 683 iev.iev_keyrsc = k->wk_keyrsc[tid]; 684 iev.iev_rsc = rsc; 685 CURVNET_SET(ifp->if_vnet); 686 rt_ieee80211msg(ifp, RTM_IEEE80211_REPLAY, &iev, sizeof(iev)); 687 CURVNET_RESTORE(); 688 } 689 } 690 691 void 692 ieee80211_notify_michael_failure(struct ieee80211vap *vap, 693 const struct ieee80211_frame *wh, u_int keyix) 694 { 695 struct ifnet *ifp = vap->iv_ifp; 696 697 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2, 698 "michael MIC verification failed <keyix %u>", keyix); 699 vap->iv_stats.is_rx_tkipmic++; 700 701 if (ifp != NULL) { /* NB: for cipher test modules */ 702 struct ieee80211_michael_event iev; 703 704 IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1); 705 IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2); 706 iev.iev_cipher = IEEE80211_CIPHER_TKIP; 707 iev.iev_keyix = keyix; 708 CURVNET_SET(ifp->if_vnet); 709 rt_ieee80211msg(ifp, RTM_IEEE80211_MICHAEL, &iev, sizeof(iev)); 710 CURVNET_RESTORE(); 711 } 712 } 713 714 void 715 ieee80211_notify_wds_discover(struct ieee80211_node *ni) 716 { 717 struct ieee80211vap *vap = ni->ni_vap; 718 struct ifnet *ifp = vap->iv_ifp; 719 720 notify_macaddr(ifp, RTM_IEEE80211_WDS, ni->ni_macaddr); 721 } 722 723 void 724 ieee80211_notify_csa(struct ieee80211com *ic, 725 const struct ieee80211_channel *c, int mode, int count) 726 { 727 struct ieee80211_csa_event iev; 728 struct ieee80211vap *vap; 729 struct ifnet *ifp; 730 731 memset(&iev, 0, sizeof(iev)); 732 iev.iev_flags = c->ic_flags; 733 iev.iev_freq = c->ic_freq; 734 iev.iev_ieee = c->ic_ieee; 735 iev.iev_mode = mode; 736 iev.iev_count = count; 737 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 738 ifp = vap->iv_ifp; 739 CURVNET_SET(ifp->if_vnet); 740 rt_ieee80211msg(ifp, RTM_IEEE80211_CSA, &iev, sizeof(iev)); 741 CURVNET_RESTORE(); 742 } 743 } 744 745 void 746 ieee80211_notify_radar(struct ieee80211com *ic, 747 const struct ieee80211_channel *c) 748 { 749 struct ieee80211_radar_event iev; 750 struct ieee80211vap *vap; 751 struct ifnet *ifp; 752 753 memset(&iev, 0, sizeof(iev)); 754 iev.iev_flags = c->ic_flags; 755 iev.iev_freq = c->ic_freq; 756 iev.iev_ieee = c->ic_ieee; 757 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 758 ifp = vap->iv_ifp; 759 CURVNET_SET(ifp->if_vnet); 760 rt_ieee80211msg(ifp, RTM_IEEE80211_RADAR, &iev, sizeof(iev)); 761 CURVNET_RESTORE(); 762 } 763 } 764 765 void 766 ieee80211_notify_cac(struct ieee80211com *ic, 767 const struct ieee80211_channel *c, enum ieee80211_notify_cac_event type) 768 { 769 struct ieee80211_cac_event iev; 770 struct ieee80211vap *vap; 771 struct ifnet *ifp; 772 773 memset(&iev, 0, sizeof(iev)); 774 iev.iev_flags = c->ic_flags; 775 iev.iev_freq = c->ic_freq; 776 iev.iev_ieee = c->ic_ieee; 777 iev.iev_type = type; 778 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 779 ifp = vap->iv_ifp; 780 CURVNET_SET(ifp->if_vnet); 781 rt_ieee80211msg(ifp, RTM_IEEE80211_CAC, &iev, sizeof(iev)); 782 CURVNET_RESTORE(); 783 } 784 } 785 786 void 787 ieee80211_notify_node_deauth(struct ieee80211_node *ni) 788 { 789 struct ieee80211vap *vap = ni->ni_vap; 790 struct ifnet *ifp = vap->iv_ifp; 791 792 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node deauth"); 793 794 notify_macaddr(ifp, RTM_IEEE80211_DEAUTH, ni->ni_macaddr); 795 } 796 797 void 798 ieee80211_notify_node_auth(struct ieee80211_node *ni) 799 { 800 struct ieee80211vap *vap = ni->ni_vap; 801 struct ifnet *ifp = vap->iv_ifp; 802 803 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node auth"); 804 805 notify_macaddr(ifp, RTM_IEEE80211_AUTH, ni->ni_macaddr); 806 } 807 808 void 809 ieee80211_notify_country(struct ieee80211vap *vap, 810 const uint8_t bssid[IEEE80211_ADDR_LEN], const uint8_t cc[2]) 811 { 812 struct ifnet *ifp = vap->iv_ifp; 813 struct ieee80211_country_event iev; 814 815 memset(&iev, 0, sizeof(iev)); 816 IEEE80211_ADDR_COPY(iev.iev_addr, bssid); 817 iev.iev_cc[0] = cc[0]; 818 iev.iev_cc[1] = cc[1]; 819 CURVNET_SET(ifp->if_vnet); 820 rt_ieee80211msg(ifp, RTM_IEEE80211_COUNTRY, &iev, sizeof(iev)); 821 CURVNET_RESTORE(); 822 } 823 824 void 825 ieee80211_notify_radio(struct ieee80211com *ic, int state) 826 { 827 struct ieee80211_radio_event iev; 828 struct ieee80211vap *vap; 829 struct ifnet *ifp; 830 831 memset(&iev, 0, sizeof(iev)); 832 iev.iev_state = state; 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_RADIO, &iev, sizeof(iev)); 837 CURVNET_RESTORE(); 838 } 839 } 840 841 void 842 ieee80211_load_module(const char *modname) 843 { 844 845 #ifdef notyet 846 (void)kern_kldload(curthread, modname, NULL); 847 #else 848 printf("%s: load the %s module by hand for now.\n", __func__, modname); 849 #endif 850 } 851 852 static eventhandler_tag wlan_bpfevent; 853 854 static void 855 bpf_track(void *arg, struct ifnet *ifp, int dlt, int attach) 856 { 857 /* NB: identify vap's by if_init */ 858 if (dlt == DLT_IEEE802_11_RADIO && 859 ifp->if_init == ieee80211_init) { 860 struct ieee80211vap *vap = ifp->if_softc; 861 /* 862 * Track bpf radiotap listener state. We mark the vap 863 * to indicate if any listener is present and the com 864 * to indicate if any listener exists on any associated 865 * vap. This flag is used by drivers to prepare radiotap 866 * state only when needed. 867 */ 868 if (attach) { 869 ieee80211_syncflag_ext(vap, IEEE80211_FEXT_BPF); 870 if (vap->iv_opmode == IEEE80211_M_MONITOR) 871 atomic_add_int(&vap->iv_ic->ic_montaps, 1); 872 } else if (!bpf_peers_present(vap->iv_rawbpf)) { 873 ieee80211_syncflag_ext(vap, -IEEE80211_FEXT_BPF); 874 if (vap->iv_opmode == IEEE80211_M_MONITOR) 875 atomic_subtract_int(&vap->iv_ic->ic_montaps, 1); 876 } 877 } 878 } 879 880 /* 881 * Module glue. 882 * 883 * NB: the module name is "wlan" for compatibility with NetBSD. 884 */ 885 static int 886 wlan_modevent(module_t mod, int type, void *unused) 887 { 888 switch (type) { 889 case MOD_LOAD: 890 if (bootverbose) 891 printf("wlan: <802.11 Link Layer>\n"); 892 wlan_bpfevent = EVENTHANDLER_REGISTER(bpf_track, 893 bpf_track, 0, EVENTHANDLER_PRI_ANY); 894 wlan_cloner = if_clone_simple(wlanname, wlan_clone_create, 895 wlan_clone_destroy, 0); 896 return 0; 897 case MOD_UNLOAD: 898 if_clone_detach(wlan_cloner); 899 EVENTHANDLER_DEREGISTER(bpf_track, wlan_bpfevent); 900 return 0; 901 } 902 return EINVAL; 903 } 904 905 static moduledata_t wlan_mod = { 906 wlanname, 907 wlan_modevent, 908 0 909 }; 910 DECLARE_MODULE(wlan, wlan_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST); 911 MODULE_VERSION(wlan, 1); 912 MODULE_DEPEND(wlan, ether, 1, 1, 1); 913 #ifdef IEEE80211_ALQ 914 MODULE_DEPEND(wlan, alq, 1, 1, 1); 915 #endif /* IEEE80211_ALQ */ 916 917