1 /*- 2 * Copyright (c) 2001 Atsushi Onoe 3 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 /* 31 * IEEE 802.11 generic handler 32 */ 33 #include "opt_wlan.h" 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/kernel.h> 38 39 #include <sys/socket.h> 40 41 #include <net/if.h> 42 #include <net/if_var.h> 43 #include <net/if_dl.h> 44 #include <net/if_media.h> 45 #include <net/if_types.h> 46 #include <net/ethernet.h> 47 48 #include <netproto/802_11/ieee80211_var.h> 49 #include <netproto/802_11/ieee80211_regdomain.h> 50 #ifdef IEEE80211_SUPPORT_SUPERG 51 #include <netproto/802_11/ieee80211_superg.h> 52 #endif 53 #include <netproto/802_11/ieee80211_ratectl.h> 54 55 #include <net/bpf.h> 56 57 #define IEEE80211_NMBCLUSTERS_DEFMIN 32 58 #define IEEE80211_NMBCLUSTERS_DEFAULT 128 59 60 static int ieee80211_nmbclusters_default = IEEE80211_NMBCLUSTERS_DEFAULT; 61 TUNABLE_INT("net.link.ieee80211.nmbclusters", &ieee80211_nmbclusters_default); 62 63 const char *ieee80211_phymode_name[IEEE80211_MODE_MAX] = { 64 [IEEE80211_MODE_AUTO] = "auto", 65 [IEEE80211_MODE_11A] = "11a", 66 [IEEE80211_MODE_11B] = "11b", 67 [IEEE80211_MODE_11G] = "11g", 68 [IEEE80211_MODE_FH] = "FH", 69 [IEEE80211_MODE_TURBO_A] = "turboA", 70 [IEEE80211_MODE_TURBO_G] = "turboG", 71 [IEEE80211_MODE_STURBO_A] = "sturboA", 72 [IEEE80211_MODE_HALF] = "half", 73 [IEEE80211_MODE_QUARTER] = "quarter", 74 [IEEE80211_MODE_11NA] = "11na", 75 [IEEE80211_MODE_11NG] = "11ng", 76 }; 77 /* map ieee80211_opmode to the corresponding capability bit */ 78 const int ieee80211_opcap[IEEE80211_OPMODE_MAX] = { 79 [IEEE80211_M_IBSS] = IEEE80211_C_IBSS, 80 [IEEE80211_M_WDS] = IEEE80211_C_WDS, 81 [IEEE80211_M_STA] = IEEE80211_C_STA, 82 [IEEE80211_M_AHDEMO] = IEEE80211_C_AHDEMO, 83 [IEEE80211_M_HOSTAP] = IEEE80211_C_HOSTAP, 84 [IEEE80211_M_MONITOR] = IEEE80211_C_MONITOR, 85 #ifdef IEEE80211_SUPPORT_MESH 86 [IEEE80211_M_MBSS] = IEEE80211_C_MBSS, 87 #endif 88 }; 89 90 const uint8_t ieee80211broadcastaddr[IEEE80211_ADDR_LEN] = 91 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 92 93 static void ieee80211_syncflag_locked(struct ieee80211com *ic, int flag); 94 static void ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag); 95 static void ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag); 96 static int ieee80211_media_setup(struct ieee80211com *ic, 97 struct ifmedia *media, int caps, int addsta, 98 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat); 99 static void ieee80211com_media_status(struct ifnet *, struct ifmediareq *); 100 static int ieee80211com_media_change(struct ifnet *); 101 static int media_status(enum ieee80211_opmode, 102 const struct ieee80211_channel *); 103 104 MALLOC_DEFINE(M_80211_VAP, "80211vap", "802.11 vap state"); 105 106 /* 107 * Default supported rates for 802.11 operation (in IEEE .5Mb units). 108 */ 109 #define B(r) ((r) | IEEE80211_RATE_BASIC) 110 static const struct ieee80211_rateset ieee80211_rateset_11a = 111 { 8, { B(12), 18, B(24), 36, B(48), 72, 96, 108 } }; 112 static const struct ieee80211_rateset ieee80211_rateset_half = 113 { 8, { B(6), 9, B(12), 18, B(24), 36, 48, 54 } }; 114 static const struct ieee80211_rateset ieee80211_rateset_quarter = 115 { 8, { B(3), 4, B(6), 9, B(12), 18, 24, 27 } }; 116 static const struct ieee80211_rateset ieee80211_rateset_11b = 117 { 4, { B(2), B(4), B(11), B(22) } }; 118 /* NB: OFDM rates are handled specially based on mode */ 119 static const struct ieee80211_rateset ieee80211_rateset_11g = 120 { 12, { B(2), B(4), B(11), B(22), 12, 18, 24, 36, 48, 72, 96, 108 } }; 121 #undef B 122 123 /* 124 * Fill in 802.11 available channel set, mark 125 * all available channels as active, and pick 126 * a default channel if not already specified. 127 */ 128 static void 129 ieee80211_chan_init(struct ieee80211com *ic) 130 { 131 #define DEFAULTRATES(m, def) do { \ 132 if (ic->ic_sup_rates[m].rs_nrates == 0) \ 133 ic->ic_sup_rates[m] = def; \ 134 } while (0) 135 struct ieee80211_channel *c; 136 int i; 137 138 KASSERT(0 < ic->ic_nchans && ic->ic_nchans <= IEEE80211_CHAN_MAX, 139 ("invalid number of channels specified: %u", ic->ic_nchans)); 140 memset(ic->ic_chan_avail, 0, sizeof(ic->ic_chan_avail)); 141 memset(ic->ic_modecaps, 0, sizeof(ic->ic_modecaps)); 142 setbit(ic->ic_modecaps, IEEE80211_MODE_AUTO); 143 for (i = 0; i < ic->ic_nchans; i++) { 144 c = &ic->ic_channels[i]; 145 KASSERT(c->ic_flags != 0, ("channel with no flags")); 146 /* 147 * Help drivers that work only with frequencies by filling 148 * in IEEE channel #'s if not already calculated. Note this 149 * mimics similar work done in ieee80211_setregdomain when 150 * changing regulatory state. 151 */ 152 if (c->ic_ieee == 0) 153 c->ic_ieee = ieee80211_mhz2ieee(c->ic_freq,c->ic_flags); 154 if (IEEE80211_IS_CHAN_HT40(c) && c->ic_extieee == 0) 155 c->ic_extieee = ieee80211_mhz2ieee(c->ic_freq + 156 (IEEE80211_IS_CHAN_HT40U(c) ? 20 : -20), 157 c->ic_flags); 158 /* default max tx power to max regulatory */ 159 if (c->ic_maxpower == 0) 160 c->ic_maxpower = 2*c->ic_maxregpower; 161 setbit(ic->ic_chan_avail, c->ic_ieee); 162 /* 163 * Identify mode capabilities. 164 */ 165 if (IEEE80211_IS_CHAN_A(c)) 166 setbit(ic->ic_modecaps, IEEE80211_MODE_11A); 167 if (IEEE80211_IS_CHAN_B(c)) 168 setbit(ic->ic_modecaps, IEEE80211_MODE_11B); 169 if (IEEE80211_IS_CHAN_ANYG(c)) 170 setbit(ic->ic_modecaps, IEEE80211_MODE_11G); 171 if (IEEE80211_IS_CHAN_FHSS(c)) 172 setbit(ic->ic_modecaps, IEEE80211_MODE_FH); 173 if (IEEE80211_IS_CHAN_108A(c)) 174 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_A); 175 if (IEEE80211_IS_CHAN_108G(c)) 176 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_G); 177 if (IEEE80211_IS_CHAN_ST(c)) 178 setbit(ic->ic_modecaps, IEEE80211_MODE_STURBO_A); 179 if (IEEE80211_IS_CHAN_HALF(c)) 180 setbit(ic->ic_modecaps, IEEE80211_MODE_HALF); 181 if (IEEE80211_IS_CHAN_QUARTER(c)) 182 setbit(ic->ic_modecaps, IEEE80211_MODE_QUARTER); 183 if (IEEE80211_IS_CHAN_HTA(c)) 184 setbit(ic->ic_modecaps, IEEE80211_MODE_11NA); 185 if (IEEE80211_IS_CHAN_HTG(c)) 186 setbit(ic->ic_modecaps, IEEE80211_MODE_11NG); 187 } 188 /* initialize candidate channels to all available */ 189 memcpy(ic->ic_chan_active, ic->ic_chan_avail, 190 sizeof(ic->ic_chan_avail)); 191 192 /* sort channel table to allow lookup optimizations */ 193 ieee80211_sort_channels(ic->ic_channels, ic->ic_nchans); 194 195 /* invalidate any previous state */ 196 ic->ic_bsschan = IEEE80211_CHAN_ANYC; 197 ic->ic_prevchan = NULL; 198 ic->ic_csa_newchan = NULL; 199 /* arbitrarily pick the first channel */ 200 ic->ic_curchan = &ic->ic_channels[0]; 201 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 202 203 /* fillin well-known rate sets if driver has not specified */ 204 DEFAULTRATES(IEEE80211_MODE_11B, ieee80211_rateset_11b); 205 DEFAULTRATES(IEEE80211_MODE_11G, ieee80211_rateset_11g); 206 DEFAULTRATES(IEEE80211_MODE_11A, ieee80211_rateset_11a); 207 DEFAULTRATES(IEEE80211_MODE_TURBO_A, ieee80211_rateset_11a); 208 DEFAULTRATES(IEEE80211_MODE_TURBO_G, ieee80211_rateset_11g); 209 DEFAULTRATES(IEEE80211_MODE_STURBO_A, ieee80211_rateset_11a); 210 DEFAULTRATES(IEEE80211_MODE_HALF, ieee80211_rateset_half); 211 DEFAULTRATES(IEEE80211_MODE_QUARTER, ieee80211_rateset_quarter); 212 DEFAULTRATES(IEEE80211_MODE_11NA, ieee80211_rateset_11a); 213 DEFAULTRATES(IEEE80211_MODE_11NG, ieee80211_rateset_11g); 214 215 /* 216 * Setup required information to fill the mcsset field, if driver did 217 * not. Assume a 2T2R setup for historic reasons. 218 */ 219 if (ic->ic_rxstream == 0) 220 ic->ic_rxstream = 2; 221 if (ic->ic_txstream == 0) 222 ic->ic_txstream = 2; 223 224 /* 225 * Set auto mode to reset active channel state and any desired channel. 226 */ 227 (void) ieee80211_setmode(ic, IEEE80211_MODE_AUTO); 228 #undef DEFAULTRATES 229 } 230 231 static void 232 null_update_mcast(struct ifnet *ifp) 233 { 234 if_printf(ifp, "need multicast update callback\n"); 235 } 236 237 static void 238 null_update_promisc(struct ifnet *ifp) 239 { 240 if_printf(ifp, "need promiscuous mode update callback\n"); 241 } 242 243 static int 244 null_transmit(struct ifnet *ifp, struct mbuf *m) 245 { 246 m_freem(m); 247 IFNET_STAT_INC(ifp, oerrors, 1); 248 return EACCES; /* XXX EIO/EPERM? */ 249 } 250 251 #if defined(__DragonFly__) 252 static int 253 null_output(struct ifnet *ifp, struct mbuf *m, 254 struct sockaddr *dst, struct rtentry *ro) 255 #elif __FreeBSD_version >= 1000031 256 static int 257 null_output(struct ifnet *ifp, struct mbuf *m, 258 const struct sockaddr *dst, struct route *ro) 259 #else 260 static int 261 null_output(struct ifnet *ifp, struct mbuf *m, 262 struct sockaddr *dst, struct route *ro) 263 #endif 264 { 265 if_printf(ifp, "discard raw packet\n"); 266 return null_transmit(ifp, m); 267 } 268 269 #if defined(__DragonFly__) 270 271 static void 272 null_input(struct ifnet *ifp, struct mbuf *m, 273 const struct pktinfo *pi, int cpuid) 274 { 275 if_printf(ifp, "if_input should not be called\n"); 276 m_freem(m); 277 } 278 279 #else 280 281 static void 282 null_input(struct ifnet *ifp, struct mbuf *m) 283 { 284 if_printf(ifp, "if_input should not be called\n"); 285 m_freem(m); 286 } 287 288 #endif 289 290 static void 291 null_update_chw(struct ieee80211com *ic) 292 { 293 294 if_printf(ic->ic_ifp, "%s: need callback\n", __func__); 295 } 296 297 /* 298 * Attach/setup the common net80211 state. Called by 299 * the driver on attach to prior to creating any vap's. 300 */ 301 void 302 ieee80211_ifattach(struct ieee80211com *ic, 303 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 304 { 305 struct ifnet *ifp = ic->ic_ifp; 306 struct sockaddr_dl *sdl; 307 struct ifaddr *ifa; 308 309 KASSERT(ifp->if_type == IFT_IEEE80211, ("if_type %d", ifp->if_type)); 310 311 IEEE80211_LOCK_INIT(ic, ifp->if_xname); 312 IEEE80211_TX_LOCK_INIT(ic, ifp->if_xname); 313 TAILQ_INIT(&ic->ic_vaps); 314 315 /* Create a taskqueue for all state changes */ 316 ic->ic_tq = taskqueue_create("ic_taskq", M_WAITOK | M_ZERO, 317 taskqueue_thread_enqueue, &ic->ic_tq); 318 #if defined(__DragonFly__) 319 taskqueue_start_threads(&ic->ic_tq, 1, TDPRI_KERN_DAEMON, -1, 320 "%s net80211 taskq", ifp->if_xname); 321 #else 322 taskqueue_start_threads(&ic->ic_tq, 1, PI_NET, "%s net80211 taskq", 323 ifp->if_xname); 324 #endif 325 /* 326 * Fill in 802.11 available channel set, mark all 327 * available channels as active, and pick a default 328 * channel if not already specified. 329 */ 330 ieee80211_media_init(ic); 331 332 ic->ic_update_mcast = null_update_mcast; 333 ic->ic_update_promisc = null_update_promisc; 334 ic->ic_update_chw = null_update_chw; 335 336 ic->ic_hash_key = arc4random(); 337 ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT; 338 ic->ic_lintval = ic->ic_bintval; 339 ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX; 340 341 ieee80211_crypto_attach(ic); 342 ieee80211_node_attach(ic); 343 ieee80211_power_attach(ic); 344 ieee80211_proto_attach(ic); 345 #ifdef IEEE80211_SUPPORT_SUPERG 346 ieee80211_superg_attach(ic); 347 #endif 348 ieee80211_ht_attach(ic); 349 ieee80211_scan_attach(ic); 350 ieee80211_regdomain_attach(ic); 351 ieee80211_dfs_attach(ic); 352 353 ieee80211_sysctl_attach(ic); 354 355 ifp->if_addrlen = IEEE80211_ADDR_LEN; 356 ifp->if_hdrlen = 0; 357 358 /* 359 * If driver does not configure # of mbuf clusters/jclusters 360 * that could sit on the device queues for quite some time, 361 * we then assume: 362 * - The device queues only consume mbuf clusters. 363 * - No more than ieee80211_nmbclusters_default (by default 364 * 128) mbuf clusters will sit on the device queues for 365 * quite some time. 366 */ 367 if (ifp->if_nmbclusters <= 0 && ifp->if_nmbjclusters <= 0) { 368 if (ieee80211_nmbclusters_default < 369 IEEE80211_NMBCLUSTERS_DEFMIN) { 370 kprintf("ieee80211 nmbclusters %d -> %d\n", 371 ieee80211_nmbclusters_default, 372 IEEE80211_NMBCLUSTERS_DEFAULT); 373 ieee80211_nmbclusters_default = 374 IEEE80211_NMBCLUSTERS_DEFAULT; 375 } 376 ifp->if_nmbclusters = ieee80211_nmbclusters_default; 377 } 378 379 CURVNET_SET(vnet0); 380 381 /* 382 * This function must _not_ be serialized by the WLAN serializer, 383 * since it could dead-lock the domsg to netisrs in if_attach(). 384 */ 385 wlan_serialize_exit(); 386 #if defined(__DragonFly__) 387 if_attach(ifp, &wlan_global_serializer); 388 #else 389 if_attach(ifp); 390 #endif 391 wlan_serialize_enter(); 392 393 ifp->if_mtu = IEEE80211_MTU_MAX; 394 ifp->if_broadcastaddr = ieee80211broadcastaddr; 395 ifp->if_output = null_output; 396 ifp->if_input = null_input; /* just in case */ 397 ifp->if_resolvemulti = NULL; /* NB: callers check */ 398 399 ifa = TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa; 400 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 401 sdl->sdl_type = IFT_ETHER; /* XXX IFT_IEEE80211? */ 402 sdl->sdl_alen = IEEE80211_ADDR_LEN; 403 IEEE80211_ADDR_COPY(LLADDR(sdl), macaddr); 404 405 CURVNET_RESTORE(); 406 } 407 408 /* 409 * Detach net80211 state on device detach. Tear down 410 * all vap's and reclaim all common state prior to the 411 * device state going away. Note we may call back into 412 * driver; it must be prepared for this. 413 */ 414 void 415 ieee80211_ifdetach(struct ieee80211com *ic) 416 { 417 struct ifnet *ifp = ic->ic_ifp; 418 struct ieee80211vap *vap; 419 420 /* 421 * The VAP is responsible for setting and clearing 422 * the VIMAGE context. 423 */ 424 while ((vap = TAILQ_FIRST(&ic->ic_vaps)) != NULL) 425 ieee80211_vap_destroy(vap); 426 427 /* 428 * WLAN serializer must _not_ be held for if_detach(), 429 * since it could dead-lock the domsg to netisrs. 430 * 431 * XXX 432 * This function actually should _not_ be serialized 433 * by the WLAN serializer, however, all 802.11 device 434 * drivers serialize it ... 435 */ 436 wlan_serialize_exit(); 437 438 /* 439 * This detaches the main interface, but not the vaps. 440 * Each VAP may be in a separate VIMAGE. 441 * 442 * Detach the main interface _after_ all vaps are 443 * destroyed, since the main interface is referenced 444 * on vaps' detach path. 445 */ 446 CURVNET_SET(ifp->if_vnet); 447 if_detach(ifp); 448 CURVNET_RESTORE(); 449 450 /* Re-hold WLAN serializer */ 451 wlan_serialize_enter(); 452 453 ieee80211_waitfor_parent(ic); 454 455 ieee80211_sysctl_detach(ic); 456 ieee80211_dfs_detach(ic); 457 ieee80211_regdomain_detach(ic); 458 ieee80211_scan_detach(ic); 459 #ifdef IEEE80211_SUPPORT_SUPERG 460 ieee80211_superg_detach(ic); 461 #endif 462 ieee80211_ht_detach(ic); 463 /* NB: must be called before ieee80211_node_detach */ 464 ieee80211_proto_detach(ic); 465 ieee80211_crypto_detach(ic); 466 ieee80211_power_detach(ic); 467 ieee80211_node_detach(ic); 468 469 /* XXX VNET needed? */ 470 ifmedia_removeall(&ic->ic_media); 471 472 taskqueue_free(ic->ic_tq); 473 IEEE80211_TX_LOCK_DESTROY(ic); 474 IEEE80211_LOCK_DESTROY(ic); 475 } 476 477 /* 478 * Default reset method for use with the ioctl support. This 479 * method is invoked after any state change in the 802.11 480 * layer that should be propagated to the hardware but not 481 * require re-initialization of the 802.11 state machine (e.g 482 * rescanning for an ap). We always return ENETRESET which 483 * should cause the driver to re-initialize the device. Drivers 484 * can override this method to implement more optimized support. 485 */ 486 static int 487 default_reset(struct ieee80211vap *vap, u_long cmd) 488 { 489 return ENETRESET; 490 } 491 492 /* 493 * Prepare a vap for use. Drivers use this call to 494 * setup net80211 state in new vap's prior attaching 495 * them with ieee80211_vap_attach (below). 496 */ 497 int 498 ieee80211_vap_setup(struct ieee80211com *ic, struct ieee80211vap *vap, 499 const char name[IFNAMSIZ], int unit, enum ieee80211_opmode opmode, 500 int flags, const uint8_t bssid[IEEE80211_ADDR_LEN], 501 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 502 { 503 struct ifnet *ifp; 504 505 ifp = if_alloc(IFT_ETHER); 506 if (ifp == NULL) { 507 if_printf(ic->ic_ifp, "%s: unable to allocate ifnet\n", 508 __func__); 509 return ENOMEM; 510 } 511 if_initname(ifp, name, unit); 512 ifp->if_softc = vap; /* back pointer */ 513 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 514 ifp->if_start = ieee80211_vap_start; 515 #if 0 516 ifp->if_transmit = ieee80211_vap_transmit; 517 ifp->if_qflush = ieee80211_vap_qflush; 518 #endif 519 ifp->if_ioctl = ieee80211_ioctl; 520 ifp->if_init = ieee80211_init; 521 522 vap->iv_ifp = ifp; 523 vap->iv_ic = ic; 524 vap->iv_flags = ic->ic_flags; /* propagate common flags */ 525 vap->iv_flags_ext = ic->ic_flags_ext; 526 vap->iv_flags_ven = ic->ic_flags_ven; 527 vap->iv_caps = ic->ic_caps &~ IEEE80211_C_OPMODE; 528 vap->iv_htcaps = ic->ic_htcaps; 529 vap->iv_htextcaps = ic->ic_htextcaps; 530 vap->iv_opmode = opmode; 531 vap->iv_caps |= ieee80211_opcap[opmode]; 532 switch (opmode) { 533 case IEEE80211_M_WDS: 534 /* 535 * WDS links must specify the bssid of the far end. 536 * For legacy operation this is a static relationship. 537 * For non-legacy operation the station must associate 538 * and be authorized to pass traffic. Plumbing the 539 * vap to the proper node happens when the vap 540 * transitions to RUN state. 541 */ 542 IEEE80211_ADDR_COPY(vap->iv_des_bssid, bssid); 543 vap->iv_flags |= IEEE80211_F_DESBSSID; 544 if (flags & IEEE80211_CLONE_WDSLEGACY) 545 vap->iv_flags_ext |= IEEE80211_FEXT_WDSLEGACY; 546 break; 547 #ifdef IEEE80211_SUPPORT_TDMA 548 case IEEE80211_M_AHDEMO: 549 if (flags & IEEE80211_CLONE_TDMA) { 550 /* NB: checked before clone operation allowed */ 551 KASSERT(ic->ic_caps & IEEE80211_C_TDMA, 552 ("not TDMA capable, ic_caps 0x%x", ic->ic_caps)); 553 /* 554 * Propagate TDMA capability to mark vap; this 555 * cannot be removed and is used to distinguish 556 * regular ahdemo operation from ahdemo+tdma. 557 */ 558 vap->iv_caps |= IEEE80211_C_TDMA; 559 } 560 break; 561 #endif 562 default: 563 break; 564 } 565 /* auto-enable s/w beacon miss support */ 566 if (flags & IEEE80211_CLONE_NOBEACONS) 567 vap->iv_flags_ext |= IEEE80211_FEXT_SWBMISS; 568 /* auto-generated or user supplied MAC address */ 569 if (flags & (IEEE80211_CLONE_BSSID|IEEE80211_CLONE_MACADDR)) 570 vap->iv_flags_ext |= IEEE80211_FEXT_UNIQMAC; 571 /* 572 * Enable various functionality by default if we're 573 * capable; the driver can override us if it knows better. 574 */ 575 if (vap->iv_caps & IEEE80211_C_WME) 576 vap->iv_flags |= IEEE80211_F_WME; 577 if (vap->iv_caps & IEEE80211_C_BURST) 578 vap->iv_flags |= IEEE80211_F_BURST; 579 /* NB: bg scanning only makes sense for station mode right now */ 580 #if 0 581 /* 582 * DISABLE BGSCAN BY DEFAULT, many issues can crop up including 583 * the link going dead. 584 */ 585 if (vap->iv_opmode == IEEE80211_M_STA && 586 (vap->iv_caps & IEEE80211_C_BGSCAN)) 587 vap->iv_flags |= IEEE80211_F_BGSCAN; 588 #endif 589 vap->iv_flags |= IEEE80211_F_DOTH; /* XXX no cap, just ena */ 590 /* NB: DFS support only makes sense for ap mode right now */ 591 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 592 (vap->iv_caps & IEEE80211_C_DFS)) 593 vap->iv_flags_ext |= IEEE80211_FEXT_DFS; 594 595 vap->iv_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */ 596 vap->iv_bmissthreshold = IEEE80211_HWBMISS_DEFAULT; 597 vap->iv_dtim_period = IEEE80211_DTIM_DEFAULT; 598 /* 599 * Install a default reset method for the ioctl support; 600 * the driver can override this. 601 */ 602 vap->iv_reset = default_reset; 603 604 IEEE80211_ADDR_COPY(vap->iv_myaddr, macaddr); 605 606 ieee80211_sysctl_vattach(vap); 607 ieee80211_crypto_vattach(vap); 608 ieee80211_node_vattach(vap); 609 ieee80211_power_vattach(vap); 610 ieee80211_proto_vattach(vap); 611 #ifdef IEEE80211_SUPPORT_SUPERG 612 ieee80211_superg_vattach(vap); 613 #endif 614 ieee80211_ht_vattach(vap); 615 ieee80211_scan_vattach(vap); 616 ieee80211_regdomain_vattach(vap); 617 ieee80211_radiotap_vattach(vap); 618 ieee80211_ratectl_set(vap, IEEE80211_RATECTL_NONE); 619 620 return 0; 621 } 622 623 /* 624 * Activate a vap. State should have been prepared with a 625 * call to ieee80211_vap_setup and by the driver. On return 626 * from this call the vap is ready for use. 627 */ 628 int 629 ieee80211_vap_attach(struct ieee80211vap *vap, 630 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) 631 { 632 struct ifnet *ifp = vap->iv_ifp; 633 struct ieee80211com *ic = vap->iv_ic; 634 struct ifmediareq imr; 635 int maxrate; 636 637 /* 638 * This function must _not_ be serialized by the WLAN serializer, 639 * since it could dead-lock the domsg to netisrs in ether_ifattach(). 640 */ 641 wlan_assert_notserialized(); 642 643 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 644 "%s: %s parent %s flags 0x%x flags_ext 0x%x\n", 645 __func__, ieee80211_opmode_name[vap->iv_opmode], 646 ic->ic_ifp->if_xname, vap->iv_flags, vap->iv_flags_ext); 647 648 /* 649 * Do late attach work that cannot happen until after 650 * the driver has had a chance to override defaults. 651 */ 652 ieee80211_node_latevattach(vap); 653 ieee80211_power_latevattach(vap); 654 655 maxrate = ieee80211_media_setup(ic, &vap->iv_media, vap->iv_caps, 656 vap->iv_opmode == IEEE80211_M_STA, media_change, media_stat); 657 ieee80211_media_status(ifp, &imr); 658 /* NB: strip explicit mode; we're actually in autoselect */ 659 ifmedia_set(&vap->iv_media, 660 imr.ifm_active &~ (IFM_MMASK | IFM_IEEE80211_TURBO)); 661 if (maxrate) 662 ifp->if_baudrate = IF_Mbps(maxrate); 663 664 #if defined(__DragonFly__) 665 ether_ifattach(ifp, vap->iv_myaddr, &wlan_global_serializer); 666 #else 667 ether_ifattach(ifp, vap->iv_myaddr); 668 #endif 669 /* hook output method setup by ether_ifattach */ 670 vap->iv_output = ifp->if_output; 671 ifp->if_output = ieee80211_output; 672 /* NB: if_mtu set by ether_ifattach to ETHERMTU */ 673 674 IEEE80211_LOCK(ic); 675 TAILQ_INSERT_TAIL(&ic->ic_vaps, vap, iv_next); 676 ieee80211_syncflag_locked(ic, IEEE80211_F_WME); 677 #ifdef IEEE80211_SUPPORT_SUPERG 678 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); 679 #endif 680 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); 681 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); 682 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT); 683 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40); 684 ieee80211_syncifflag_locked(ic, IFF_PROMISC); 685 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI); 686 IEEE80211_UNLOCK(ic); 687 688 return 1; 689 } 690 691 /* 692 * Tear down vap state and reclaim the ifnet. 693 * The driver is assumed to have prepared for 694 * this; e.g. by turning off interrupts for the 695 * underlying device. 696 */ 697 void 698 ieee80211_vap_detach(struct ieee80211vap *vap) 699 { 700 struct ieee80211com *ic = vap->iv_ic; 701 struct ifnet *ifp = vap->iv_ifp; 702 703 /* 704 * This function must _not_ be serialized by the WLAN serializer, 705 * since it could dead-lock the domsg to netisrs in ether_ifdettach(). 706 */ 707 wlan_assert_notserialized(); 708 709 CURVNET_SET(ifp->if_vnet); 710 711 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s parent %s\n", 712 __func__, ieee80211_opmode_name[vap->iv_opmode], 713 ic->ic_ifp->if_xname); 714 715 /* NB: bpfdetach is called by ether_ifdetach and claims all taps */ 716 ether_ifdetach(ifp); 717 718 ieee80211_stop(vap); 719 720 /* 721 * Flush any deferred vap tasks. 722 */ 723 ieee80211_draintask(ic, &vap->iv_nstate_task); 724 ieee80211_draintask(ic, &vap->iv_swbmiss_task); 725 726 #if !defined(__DragonFly__) 727 /* XXX band-aid until ifnet handles this for us */ 728 taskqueue_drain(taskqueue_swi, &ifp->if_linktask); 729 #endif 730 731 IEEE80211_LOCK(ic); 732 KASSERT(vap->iv_state == IEEE80211_S_INIT , ("vap still running")); 733 TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next); 734 ieee80211_syncflag_locked(ic, IEEE80211_F_WME); 735 #ifdef IEEE80211_SUPPORT_SUPERG 736 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); 737 #endif 738 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); 739 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); 740 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT); 741 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40); 742 /* NB: this handles the bpfdetach done below */ 743 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_BPF); 744 ieee80211_syncifflag_locked(ic, IFF_PROMISC); 745 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI); 746 IEEE80211_UNLOCK(ic); 747 748 ifmedia_removeall(&vap->iv_media); 749 750 ieee80211_radiotap_vdetach(vap); 751 ieee80211_regdomain_vdetach(vap); 752 ieee80211_scan_vdetach(vap); 753 #ifdef IEEE80211_SUPPORT_SUPERG 754 ieee80211_superg_vdetach(vap); 755 #endif 756 ieee80211_ht_vdetach(vap); 757 /* NB: must be before ieee80211_node_vdetach */ 758 ieee80211_proto_vdetach(vap); 759 ieee80211_crypto_vdetach(vap); 760 ieee80211_power_vdetach(vap); 761 ieee80211_node_vdetach(vap); 762 ieee80211_sysctl_vdetach(vap); 763 764 if_free(ifp); 765 766 CURVNET_RESTORE(); 767 } 768 769 /* 770 * Synchronize flag bit state in the parent ifnet structure 771 * according to the state of all vap ifnet's. This is used, 772 * for example, to handle IFF_PROMISC and IFF_ALLMULTI. 773 */ 774 void 775 ieee80211_syncifflag_locked(struct ieee80211com *ic, int flag) 776 { 777 struct ifnet *ifp = ic->ic_ifp; 778 struct ieee80211vap *vap; 779 int bit, oflags; 780 781 IEEE80211_LOCK_ASSERT(ic); 782 783 bit = 0; 784 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 785 if (vap->iv_ifp->if_flags & flag) { 786 /* 787 * XXX the bridge sets PROMISC but we don't want to 788 * enable it on the device, discard here so all the 789 * drivers don't need to special-case it 790 */ 791 if (flag == IFF_PROMISC && 792 !(vap->iv_opmode == IEEE80211_M_MONITOR || 793 (vap->iv_opmode == IEEE80211_M_AHDEMO && 794 (vap->iv_caps & IEEE80211_C_TDMA) == 0))) 795 continue; 796 bit = 1; 797 break; 798 } 799 oflags = ifp->if_flags; 800 if (bit) 801 ifp->if_flags |= flag; 802 else 803 ifp->if_flags &= ~flag; 804 if ((ifp->if_flags ^ oflags) & flag) { 805 /* XXX should we return 1/0 and let caller do this? */ 806 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 807 if (flag == IFF_PROMISC) 808 ieee80211_runtask(ic, &ic->ic_promisc_task); 809 else if (flag == IFF_ALLMULTI) 810 ieee80211_runtask(ic, &ic->ic_mcast_task); 811 } 812 } 813 } 814 815 /* 816 * Synchronize flag bit state in the com structure 817 * according to the state of all vap's. This is used, 818 * for example, to handle state changes via ioctls. 819 */ 820 static void 821 ieee80211_syncflag_locked(struct ieee80211com *ic, int flag) 822 { 823 struct ieee80211vap *vap; 824 int bit; 825 826 IEEE80211_LOCK_ASSERT(ic); 827 828 bit = 0; 829 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 830 if (vap->iv_flags & flag) { 831 bit = 1; 832 break; 833 } 834 if (bit) 835 ic->ic_flags |= flag; 836 else 837 ic->ic_flags &= ~flag; 838 } 839 840 void 841 ieee80211_syncflag(struct ieee80211vap *vap, int flag) 842 { 843 struct ieee80211com *ic = vap->iv_ic; 844 845 IEEE80211_LOCK(ic); 846 if (flag < 0) { 847 flag = -flag; 848 vap->iv_flags &= ~flag; 849 } else 850 vap->iv_flags |= flag; 851 ieee80211_syncflag_locked(ic, flag); 852 IEEE80211_UNLOCK(ic); 853 } 854 855 /* 856 * Synchronize flags_ht bit state in the com structure 857 * according to the state of all vap's. This is used, 858 * for example, to handle state changes via ioctls. 859 */ 860 static void 861 ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag) 862 { 863 struct ieee80211vap *vap; 864 int bit; 865 866 IEEE80211_LOCK_ASSERT(ic); 867 868 bit = 0; 869 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 870 if (vap->iv_flags_ht & flag) { 871 bit = 1; 872 break; 873 } 874 if (bit) 875 ic->ic_flags_ht |= flag; 876 else 877 ic->ic_flags_ht &= ~flag; 878 } 879 880 void 881 ieee80211_syncflag_ht(struct ieee80211vap *vap, int flag) 882 { 883 struct ieee80211com *ic = vap->iv_ic; 884 885 IEEE80211_LOCK(ic); 886 if (flag < 0) { 887 flag = -flag; 888 vap->iv_flags_ht &= ~flag; 889 } else 890 vap->iv_flags_ht |= flag; 891 ieee80211_syncflag_ht_locked(ic, flag); 892 IEEE80211_UNLOCK(ic); 893 } 894 895 /* 896 * Synchronize flags_ext bit state in the com structure 897 * according to the state of all vap's. This is used, 898 * for example, to handle state changes via ioctls. 899 */ 900 static void 901 ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag) 902 { 903 struct ieee80211vap *vap; 904 int bit; 905 906 IEEE80211_LOCK_ASSERT(ic); 907 908 bit = 0; 909 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 910 if (vap->iv_flags_ext & flag) { 911 bit = 1; 912 break; 913 } 914 if (bit) 915 ic->ic_flags_ext |= flag; 916 else 917 ic->ic_flags_ext &= ~flag; 918 } 919 920 void 921 ieee80211_syncflag_ext(struct ieee80211vap *vap, int flag) 922 { 923 struct ieee80211com *ic = vap->iv_ic; 924 925 IEEE80211_LOCK(ic); 926 if (flag < 0) { 927 flag = -flag; 928 vap->iv_flags_ext &= ~flag; 929 } else 930 vap->iv_flags_ext |= flag; 931 ieee80211_syncflag_ext_locked(ic, flag); 932 IEEE80211_UNLOCK(ic); 933 } 934 935 static __inline int 936 mapgsm(u_int freq, u_int flags) 937 { 938 freq *= 10; 939 if (flags & IEEE80211_CHAN_QUARTER) 940 freq += 5; 941 else if (flags & IEEE80211_CHAN_HALF) 942 freq += 10; 943 else 944 freq += 20; 945 /* NB: there is no 907/20 wide but leave room */ 946 return (freq - 906*10) / 5; 947 } 948 949 static __inline int 950 mappsb(u_int freq, u_int flags) 951 { 952 return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5; 953 } 954 955 /* 956 * Convert MHz frequency to IEEE channel number. 957 */ 958 int 959 ieee80211_mhz2ieee(u_int freq, u_int flags) 960 { 961 #define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990) 962 if (flags & IEEE80211_CHAN_GSM) 963 return mapgsm(freq, flags); 964 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 965 if (freq == 2484) 966 return 14; 967 if (freq < 2484) 968 return ((int) freq - 2407) / 5; 969 else 970 return 15 + ((freq - 2512) / 20); 971 } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */ 972 if (freq <= 5000) { 973 /* XXX check regdomain? */ 974 if (IS_FREQ_IN_PSB(freq)) 975 return mappsb(freq, flags); 976 return (freq - 4000) / 5; 977 } else 978 return (freq - 5000) / 5; 979 } else { /* either, guess */ 980 if (freq == 2484) 981 return 14; 982 if (freq < 2484) { 983 if (907 <= freq && freq <= 922) 984 return mapgsm(freq, flags); 985 return ((int) freq - 2407) / 5; 986 } 987 if (freq < 5000) { 988 if (IS_FREQ_IN_PSB(freq)) 989 return mappsb(freq, flags); 990 else if (freq > 4900) 991 return (freq - 4000) / 5; 992 else 993 return 15 + ((freq - 2512) / 20); 994 } 995 return (freq - 5000) / 5; 996 } 997 #undef IS_FREQ_IN_PSB 998 } 999 1000 /* 1001 * Convert channel to IEEE channel number. 1002 */ 1003 int 1004 ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c) 1005 { 1006 if (c == NULL) { 1007 if_printf(ic->ic_ifp, "invalid channel (NULL)\n"); 1008 return 0; /* XXX */ 1009 } 1010 return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee); 1011 } 1012 1013 /* 1014 * Convert IEEE channel number to MHz frequency. 1015 */ 1016 u_int 1017 ieee80211_ieee2mhz(u_int chan, u_int flags) 1018 { 1019 if (flags & IEEE80211_CHAN_GSM) 1020 return 907 + 5 * (chan / 10); 1021 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 1022 if (chan == 14) 1023 return 2484; 1024 if (chan < 14) 1025 return 2407 + chan*5; 1026 else 1027 return 2512 + ((chan-15)*20); 1028 } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */ 1029 if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) { 1030 chan -= 37; 1031 return 4940 + chan*5 + (chan % 5 ? 2 : 0); 1032 } 1033 return 5000 + (chan*5); 1034 } else { /* either, guess */ 1035 /* XXX can't distinguish PSB+GSM channels */ 1036 if (chan == 14) 1037 return 2484; 1038 if (chan < 14) /* 0-13 */ 1039 return 2407 + chan*5; 1040 if (chan < 27) /* 15-26 */ 1041 return 2512 + ((chan-15)*20); 1042 return 5000 + (chan*5); 1043 } 1044 } 1045 1046 /* 1047 * Locate a channel given a frequency+flags. We cache 1048 * the previous lookup to optimize switching between two 1049 * channels--as happens with dynamic turbo. 1050 */ 1051 struct ieee80211_channel * 1052 ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags) 1053 { 1054 struct ieee80211_channel *c; 1055 int i; 1056 1057 flags &= IEEE80211_CHAN_ALLTURBO; 1058 c = ic->ic_prevchan; 1059 if (c != NULL && c->ic_freq == freq && 1060 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 1061 return c; 1062 /* brute force search */ 1063 for (i = 0; i < ic->ic_nchans; i++) { 1064 c = &ic->ic_channels[i]; 1065 if (c->ic_freq == freq && 1066 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 1067 return c; 1068 } 1069 return NULL; 1070 } 1071 1072 /* 1073 * Locate a channel given a channel number+flags. We cache 1074 * the previous lookup to optimize switching between two 1075 * channels--as happens with dynamic turbo. 1076 */ 1077 struct ieee80211_channel * 1078 ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags) 1079 { 1080 struct ieee80211_channel *c; 1081 int i; 1082 1083 flags &= IEEE80211_CHAN_ALLTURBO; 1084 c = ic->ic_prevchan; 1085 if (c != NULL && c->ic_ieee == ieee && 1086 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 1087 return c; 1088 /* brute force search */ 1089 for (i = 0; i < ic->ic_nchans; i++) { 1090 c = &ic->ic_channels[i]; 1091 if (c->ic_ieee == ieee && 1092 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 1093 return c; 1094 } 1095 return NULL; 1096 } 1097 1098 static void 1099 addmedia(struct ifmedia *media, int caps, int addsta, int mode, int mword) 1100 { 1101 #define ADD(_ic, _s, _o) \ 1102 ifmedia_add(media, \ 1103 IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL) 1104 static const u_int mopts[IEEE80211_MODE_MAX] = { 1105 [IEEE80211_MODE_AUTO] = IFM_AUTO, 1106 [IEEE80211_MODE_11A] = IFM_IEEE80211_11A, 1107 [IEEE80211_MODE_11B] = IFM_IEEE80211_11B, 1108 [IEEE80211_MODE_11G] = IFM_IEEE80211_11G, 1109 [IEEE80211_MODE_FH] = IFM_IEEE80211_FH, 1110 [IEEE80211_MODE_TURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO, 1111 [IEEE80211_MODE_TURBO_G] = IFM_IEEE80211_11G|IFM_IEEE80211_TURBO, 1112 [IEEE80211_MODE_STURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO, 1113 [IEEE80211_MODE_HALF] = IFM_IEEE80211_11A, /* XXX */ 1114 [IEEE80211_MODE_QUARTER] = IFM_IEEE80211_11A, /* XXX */ 1115 [IEEE80211_MODE_11NA] = IFM_IEEE80211_11NA, 1116 [IEEE80211_MODE_11NG] = IFM_IEEE80211_11NG, 1117 }; 1118 u_int mopt; 1119 1120 mopt = mopts[mode]; 1121 if (addsta) 1122 ADD(ic, mword, mopt); /* STA mode has no cap */ 1123 if (caps & IEEE80211_C_IBSS) 1124 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC); 1125 if (caps & IEEE80211_C_HOSTAP) 1126 ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP); 1127 if (caps & IEEE80211_C_AHDEMO) 1128 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0); 1129 if (caps & IEEE80211_C_MONITOR) 1130 ADD(media, mword, mopt | IFM_IEEE80211_MONITOR); 1131 if (caps & IEEE80211_C_WDS) 1132 ADD(media, mword, mopt | IFM_IEEE80211_WDS); 1133 if (caps & IEEE80211_C_MBSS) 1134 ADD(media, mword, mopt | IFM_IEEE80211_MBSS); 1135 #undef ADD 1136 } 1137 1138 /* 1139 * Setup the media data structures according to the channel and 1140 * rate tables. 1141 */ 1142 static int 1143 ieee80211_media_setup(struct ieee80211com *ic, 1144 struct ifmedia *media, int caps, int addsta, 1145 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) 1146 { 1147 int i, j, rate, maxrate, mword, r; 1148 enum ieee80211_phymode mode; 1149 const struct ieee80211_rateset *rs; 1150 struct ieee80211_rateset allrates; 1151 1152 /* 1153 * Fill in media characteristics. 1154 */ 1155 ifmedia_init(media, 0, media_change, media_stat); 1156 maxrate = 0; 1157 /* 1158 * Add media for legacy operating modes. 1159 */ 1160 memset(&allrates, 0, sizeof(allrates)); 1161 for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) { 1162 if (isclr(ic->ic_modecaps, mode)) 1163 continue; 1164 addmedia(media, caps, addsta, mode, IFM_AUTO); 1165 if (mode == IEEE80211_MODE_AUTO) 1166 continue; 1167 rs = &ic->ic_sup_rates[mode]; 1168 for (i = 0; i < rs->rs_nrates; i++) { 1169 rate = rs->rs_rates[i]; 1170 mword = ieee80211_rate2media(ic, rate, mode); 1171 if (mword == 0) 1172 continue; 1173 addmedia(media, caps, addsta, mode, mword); 1174 /* 1175 * Add legacy rate to the collection of all rates. 1176 */ 1177 r = rate & IEEE80211_RATE_VAL; 1178 for (j = 0; j < allrates.rs_nrates; j++) 1179 if (allrates.rs_rates[j] == r) 1180 break; 1181 if (j == allrates.rs_nrates) { 1182 /* unique, add to the set */ 1183 allrates.rs_rates[j] = r; 1184 allrates.rs_nrates++; 1185 } 1186 rate = (rate & IEEE80211_RATE_VAL) / 2; 1187 if (rate > maxrate) 1188 maxrate = rate; 1189 } 1190 } 1191 for (i = 0; i < allrates.rs_nrates; i++) { 1192 mword = ieee80211_rate2media(ic, allrates.rs_rates[i], 1193 IEEE80211_MODE_AUTO); 1194 if (mword == 0) 1195 continue; 1196 /* NB: remove media options from mword */ 1197 addmedia(media, caps, addsta, 1198 IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword)); 1199 } 1200 /* 1201 * Add HT/11n media. Note that we do not have enough 1202 * bits in the media subtype to express the MCS so we 1203 * use a "placeholder" media subtype and any fixed MCS 1204 * must be specified with a different mechanism. 1205 */ 1206 for (; mode <= IEEE80211_MODE_11NG; mode++) { 1207 if (isclr(ic->ic_modecaps, mode)) 1208 continue; 1209 addmedia(media, caps, addsta, mode, IFM_AUTO); 1210 addmedia(media, caps, addsta, mode, IFM_IEEE80211_MCS); 1211 } 1212 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) || 1213 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) { 1214 addmedia(media, caps, addsta, 1215 IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS); 1216 i = ic->ic_txstream * 8 - 1; 1217 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) && 1218 (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI40)) 1219 rate = ieee80211_htrates[i].ht40_rate_400ns; 1220 else if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40)) 1221 rate = ieee80211_htrates[i].ht40_rate_800ns; 1222 else if ((ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI20)) 1223 rate = ieee80211_htrates[i].ht20_rate_400ns; 1224 else 1225 rate = ieee80211_htrates[i].ht20_rate_800ns; 1226 if (rate > maxrate) 1227 maxrate = rate; 1228 } 1229 return maxrate; 1230 } 1231 1232 void 1233 ieee80211_media_init(struct ieee80211com *ic) 1234 { 1235 struct ifnet *ifp = ic->ic_ifp; 1236 int maxrate; 1237 1238 /* NB: this works because the structure is initialized to zero */ 1239 if (!LIST_EMPTY(&ic->ic_media.ifm_list)) { 1240 /* 1241 * We are re-initializing the channel list; clear 1242 * the existing media state as the media routines 1243 * don't suppress duplicates. 1244 */ 1245 ifmedia_removeall(&ic->ic_media); 1246 } 1247 ieee80211_chan_init(ic); 1248 1249 /* 1250 * Recalculate media settings in case new channel list changes 1251 * the set of available modes. 1252 */ 1253 maxrate = ieee80211_media_setup(ic, &ic->ic_media, ic->ic_caps, 1, 1254 ieee80211com_media_change, ieee80211com_media_status); 1255 /* NB: strip explicit mode; we're actually in autoselect */ 1256 ifmedia_set(&ic->ic_media, 1257 media_status(ic->ic_opmode, ic->ic_curchan) &~ 1258 (IFM_MMASK | IFM_IEEE80211_TURBO)); 1259 if (maxrate) 1260 ifp->if_baudrate = IF_Mbps(maxrate); 1261 1262 /* XXX need to propagate new media settings to vap's */ 1263 } 1264 1265 /* XXX inline or eliminate? */ 1266 const struct ieee80211_rateset * 1267 ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c) 1268 { 1269 /* XXX does this work for 11ng basic rates? */ 1270 return &ic->ic_sup_rates[ieee80211_chan2mode(c)]; 1271 } 1272 1273 void 1274 ieee80211_announce(struct ieee80211com *ic) 1275 { 1276 struct ifnet *ifp = ic->ic_ifp; 1277 int i, rate, mword; 1278 enum ieee80211_phymode mode; 1279 const struct ieee80211_rateset *rs; 1280 1281 /* NB: skip AUTO since it has no rates */ 1282 for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) { 1283 if (isclr(ic->ic_modecaps, mode)) 1284 continue; 1285 if_printf(ifp, "%s rates: ", ieee80211_phymode_name[mode]); 1286 rs = &ic->ic_sup_rates[mode]; 1287 for (i = 0; i < rs->rs_nrates; i++) { 1288 mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode); 1289 if (mword == 0) 1290 continue; 1291 rate = ieee80211_media2rate(mword); 1292 kprintf("%s%d%sMbps", (i != 0 ? " " : ""), 1293 rate / 2, ((rate & 0x1) != 0 ? ".5" : "")); 1294 } 1295 kprintf("\n"); 1296 } 1297 ieee80211_ht_announce(ic); 1298 } 1299 1300 void 1301 ieee80211_announce_channels(struct ieee80211com *ic) 1302 { 1303 const struct ieee80211_channel *c; 1304 char type; 1305 int i, cw; 1306 1307 kprintf("Chan Freq CW RegPwr MinPwr MaxPwr\n"); 1308 for (i = 0; i < ic->ic_nchans; i++) { 1309 c = &ic->ic_channels[i]; 1310 if (IEEE80211_IS_CHAN_ST(c)) 1311 type = 'S'; 1312 else if (IEEE80211_IS_CHAN_108A(c)) 1313 type = 'T'; 1314 else if (IEEE80211_IS_CHAN_108G(c)) 1315 type = 'G'; 1316 else if (IEEE80211_IS_CHAN_HT(c)) 1317 type = 'n'; 1318 else if (IEEE80211_IS_CHAN_A(c)) 1319 type = 'a'; 1320 else if (IEEE80211_IS_CHAN_ANYG(c)) 1321 type = 'g'; 1322 else if (IEEE80211_IS_CHAN_B(c)) 1323 type = 'b'; 1324 else 1325 type = 'f'; 1326 if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c)) 1327 cw = 40; 1328 else if (IEEE80211_IS_CHAN_HALF(c)) 1329 cw = 10; 1330 else if (IEEE80211_IS_CHAN_QUARTER(c)) 1331 cw = 5; 1332 else 1333 cw = 20; 1334 kprintf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n" 1335 , c->ic_ieee, c->ic_freq, type 1336 , cw 1337 , IEEE80211_IS_CHAN_HT40U(c) ? '+' : 1338 IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' ' 1339 , c->ic_maxregpower 1340 , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0 1341 , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0 1342 ); 1343 } 1344 } 1345 1346 static int 1347 media2mode(const struct ifmedia_entry *ime, uint32_t flags, uint16_t *mode) 1348 { 1349 switch (IFM_MODE(ime->ifm_media)) { 1350 case IFM_IEEE80211_11A: 1351 *mode = IEEE80211_MODE_11A; 1352 break; 1353 case IFM_IEEE80211_11B: 1354 *mode = IEEE80211_MODE_11B; 1355 break; 1356 case IFM_IEEE80211_11G: 1357 *mode = IEEE80211_MODE_11G; 1358 break; 1359 case IFM_IEEE80211_FH: 1360 *mode = IEEE80211_MODE_FH; 1361 break; 1362 case IFM_IEEE80211_11NA: 1363 *mode = IEEE80211_MODE_11NA; 1364 break; 1365 case IFM_IEEE80211_11NG: 1366 *mode = IEEE80211_MODE_11NG; 1367 break; 1368 case IFM_AUTO: 1369 *mode = IEEE80211_MODE_AUTO; 1370 break; 1371 default: 1372 return 0; 1373 } 1374 /* 1375 * Turbo mode is an ``option''. 1376 * XXX does not apply to AUTO 1377 */ 1378 if (ime->ifm_media & IFM_IEEE80211_TURBO) { 1379 if (*mode == IEEE80211_MODE_11A) { 1380 if (flags & IEEE80211_F_TURBOP) 1381 *mode = IEEE80211_MODE_TURBO_A; 1382 else 1383 *mode = IEEE80211_MODE_STURBO_A; 1384 } else if (*mode == IEEE80211_MODE_11G) 1385 *mode = IEEE80211_MODE_TURBO_G; 1386 else 1387 return 0; 1388 } 1389 /* XXX HT40 +/- */ 1390 return 1; 1391 } 1392 1393 /* 1394 * Handle a media change request on the underlying interface. 1395 */ 1396 int 1397 ieee80211com_media_change(struct ifnet *ifp) 1398 { 1399 return EINVAL; 1400 } 1401 1402 /* 1403 * Handle a media change request on the vap interface. 1404 */ 1405 int 1406 ieee80211_media_change(struct ifnet *ifp) 1407 { 1408 struct ieee80211vap *vap = ifp->if_softc; 1409 struct ifmedia_entry *ime = vap->iv_media.ifm_cur; 1410 uint16_t newmode; 1411 1412 if (!media2mode(ime, vap->iv_flags, &newmode)) 1413 return EINVAL; 1414 if (vap->iv_des_mode != newmode) { 1415 vap->iv_des_mode = newmode; 1416 /* XXX kick state machine if up+running */ 1417 } 1418 return 0; 1419 } 1420 1421 /* 1422 * Common code to calculate the media status word 1423 * from the operating mode and channel state. 1424 */ 1425 static int 1426 media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan) 1427 { 1428 int status; 1429 1430 status = IFM_IEEE80211; 1431 switch (opmode) { 1432 case IEEE80211_M_STA: 1433 break; 1434 case IEEE80211_M_IBSS: 1435 status |= IFM_IEEE80211_ADHOC; 1436 break; 1437 case IEEE80211_M_HOSTAP: 1438 status |= IFM_IEEE80211_HOSTAP; 1439 break; 1440 case IEEE80211_M_MONITOR: 1441 status |= IFM_IEEE80211_MONITOR; 1442 break; 1443 case IEEE80211_M_AHDEMO: 1444 status |= IFM_IEEE80211_ADHOC | IFM_FLAG0; 1445 break; 1446 case IEEE80211_M_WDS: 1447 status |= IFM_IEEE80211_WDS; 1448 break; 1449 case IEEE80211_M_MBSS: 1450 status |= IFM_IEEE80211_MBSS; 1451 break; 1452 } 1453 if (IEEE80211_IS_CHAN_HTA(chan)) { 1454 status |= IFM_IEEE80211_11NA; 1455 } else if (IEEE80211_IS_CHAN_HTG(chan)) { 1456 status |= IFM_IEEE80211_11NG; 1457 } else if (IEEE80211_IS_CHAN_A(chan)) { 1458 status |= IFM_IEEE80211_11A; 1459 } else if (IEEE80211_IS_CHAN_B(chan)) { 1460 status |= IFM_IEEE80211_11B; 1461 } else if (IEEE80211_IS_CHAN_ANYG(chan)) { 1462 status |= IFM_IEEE80211_11G; 1463 } else if (IEEE80211_IS_CHAN_FHSS(chan)) { 1464 status |= IFM_IEEE80211_FH; 1465 } 1466 /* XXX else complain? */ 1467 1468 if (IEEE80211_IS_CHAN_TURBO(chan)) 1469 status |= IFM_IEEE80211_TURBO; 1470 #if 0 1471 if (IEEE80211_IS_CHAN_HT20(chan)) 1472 status |= IFM_IEEE80211_HT20; 1473 if (IEEE80211_IS_CHAN_HT40(chan)) 1474 status |= IFM_IEEE80211_HT40; 1475 #endif 1476 return status; 1477 } 1478 1479 static void 1480 ieee80211com_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1481 { 1482 struct ieee80211com *ic = ifp->if_l2com; 1483 struct ieee80211vap *vap; 1484 1485 imr->ifm_status = IFM_AVALID; 1486 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1487 if (vap->iv_ifp->if_flags & IFF_UP) { 1488 imr->ifm_status |= IFM_ACTIVE; 1489 break; 1490 } 1491 imr->ifm_active = media_status(ic->ic_opmode, ic->ic_curchan); 1492 if (imr->ifm_status & IFM_ACTIVE) 1493 imr->ifm_current = imr->ifm_active; 1494 } 1495 1496 void 1497 ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1498 { 1499 struct ieee80211vap *vap = ifp->if_softc; 1500 struct ieee80211com *ic = vap->iv_ic; 1501 enum ieee80211_phymode mode; 1502 1503 imr->ifm_status = IFM_AVALID; 1504 /* 1505 * NB: use the current channel's mode to lock down a xmit 1506 * rate only when running; otherwise we may have a mismatch 1507 * in which case the rate will not be convertible. 1508 */ 1509 if (vap->iv_state == IEEE80211_S_RUN || 1510 vap->iv_state == IEEE80211_S_SLEEP) { 1511 imr->ifm_status |= IFM_ACTIVE; 1512 mode = ieee80211_chan2mode(ic->ic_curchan); 1513 } else 1514 mode = IEEE80211_MODE_AUTO; 1515 imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan); 1516 /* 1517 * Calculate a current rate if possible. 1518 */ 1519 if (vap->iv_txparms[mode].ucastrate != IEEE80211_FIXED_RATE_NONE) { 1520 /* 1521 * A fixed rate is set, report that. 1522 */ 1523 imr->ifm_active |= ieee80211_rate2media(ic, 1524 vap->iv_txparms[mode].ucastrate, mode); 1525 } else if (vap->iv_opmode == IEEE80211_M_STA) { 1526 /* 1527 * In station mode report the current transmit rate. 1528 */ 1529 imr->ifm_active |= ieee80211_rate2media(ic, 1530 vap->iv_bss->ni_txrate, mode); 1531 } else 1532 imr->ifm_active |= IFM_AUTO; 1533 if (imr->ifm_status & IFM_ACTIVE) 1534 imr->ifm_current = imr->ifm_active; 1535 } 1536 1537 /* 1538 * Set the current phy mode and recalculate the active channel 1539 * set based on the available channels for this mode. Also 1540 * select a new default/current channel if the current one is 1541 * inappropriate for this mode. 1542 */ 1543 int 1544 ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode) 1545 { 1546 /* 1547 * Adjust basic rates in 11b/11g supported rate set. 1548 * Note that if operating on a hal/quarter rate channel 1549 * this is a noop as those rates sets are different 1550 * and used instead. 1551 */ 1552 if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B) 1553 ieee80211_setbasicrates(&ic->ic_sup_rates[mode], mode); 1554 1555 ic->ic_curmode = mode; 1556 ieee80211_reset_erp(ic); /* reset ERP state */ 1557 1558 return 0; 1559 } 1560 1561 /* 1562 * Return the phy mode for with the specified channel. 1563 */ 1564 enum ieee80211_phymode 1565 ieee80211_chan2mode(const struct ieee80211_channel *chan) 1566 { 1567 1568 if (IEEE80211_IS_CHAN_HTA(chan)) 1569 return IEEE80211_MODE_11NA; 1570 else if (IEEE80211_IS_CHAN_HTG(chan)) 1571 return IEEE80211_MODE_11NG; 1572 else if (IEEE80211_IS_CHAN_108G(chan)) 1573 return IEEE80211_MODE_TURBO_G; 1574 else if (IEEE80211_IS_CHAN_ST(chan)) 1575 return IEEE80211_MODE_STURBO_A; 1576 else if (IEEE80211_IS_CHAN_TURBO(chan)) 1577 return IEEE80211_MODE_TURBO_A; 1578 else if (IEEE80211_IS_CHAN_HALF(chan)) 1579 return IEEE80211_MODE_HALF; 1580 else if (IEEE80211_IS_CHAN_QUARTER(chan)) 1581 return IEEE80211_MODE_QUARTER; 1582 else if (IEEE80211_IS_CHAN_A(chan)) 1583 return IEEE80211_MODE_11A; 1584 else if (IEEE80211_IS_CHAN_ANYG(chan)) 1585 return IEEE80211_MODE_11G; 1586 else if (IEEE80211_IS_CHAN_B(chan)) 1587 return IEEE80211_MODE_11B; 1588 else if (IEEE80211_IS_CHAN_FHSS(chan)) 1589 return IEEE80211_MODE_FH; 1590 1591 /* NB: should not get here */ 1592 kprintf("%s: cannot map channel to mode; freq %u flags 0x%x\n", 1593 __func__, chan->ic_freq, chan->ic_flags); 1594 return IEEE80211_MODE_11B; 1595 } 1596 1597 struct ratemedia { 1598 u_int match; /* rate + mode */ 1599 u_int media; /* if_media rate */ 1600 }; 1601 1602 static int 1603 findmedia(const struct ratemedia rates[], int n, u_int match) 1604 { 1605 int i; 1606 1607 for (i = 0; i < n; i++) 1608 if (rates[i].match == match) 1609 return rates[i].media; 1610 return IFM_AUTO; 1611 } 1612 1613 /* 1614 * Convert IEEE80211 rate value to ifmedia subtype. 1615 * Rate is either a legacy rate in units of 0.5Mbps 1616 * or an MCS index. 1617 */ 1618 int 1619 ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode) 1620 { 1621 static const struct ratemedia rates[] = { 1622 { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 }, 1623 { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 }, 1624 { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 }, 1625 { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 }, 1626 { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 }, 1627 { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 }, 1628 { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 }, 1629 { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 }, 1630 { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 }, 1631 { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 }, 1632 { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 }, 1633 { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 }, 1634 { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 }, 1635 { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 }, 1636 { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 }, 1637 { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 }, 1638 { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 }, 1639 { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 }, 1640 { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 }, 1641 { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 }, 1642 { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 }, 1643 { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 }, 1644 { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 }, 1645 { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 }, 1646 { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 }, 1647 { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 }, 1648 { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 }, 1649 { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 }, 1650 { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 }, 1651 { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 }, 1652 /* NB: OFDM72 doesn't realy exist so we don't handle it */ 1653 }; 1654 static const struct ratemedia htrates[] = { 1655 { 0, IFM_IEEE80211_MCS }, 1656 { 1, IFM_IEEE80211_MCS }, 1657 { 2, IFM_IEEE80211_MCS }, 1658 { 3, IFM_IEEE80211_MCS }, 1659 { 4, IFM_IEEE80211_MCS }, 1660 { 5, IFM_IEEE80211_MCS }, 1661 { 6, IFM_IEEE80211_MCS }, 1662 { 7, IFM_IEEE80211_MCS }, 1663 { 8, IFM_IEEE80211_MCS }, 1664 { 9, IFM_IEEE80211_MCS }, 1665 { 10, IFM_IEEE80211_MCS }, 1666 { 11, IFM_IEEE80211_MCS }, 1667 { 12, IFM_IEEE80211_MCS }, 1668 { 13, IFM_IEEE80211_MCS }, 1669 { 14, IFM_IEEE80211_MCS }, 1670 { 15, IFM_IEEE80211_MCS }, 1671 { 16, IFM_IEEE80211_MCS }, 1672 { 17, IFM_IEEE80211_MCS }, 1673 { 18, IFM_IEEE80211_MCS }, 1674 { 19, IFM_IEEE80211_MCS }, 1675 { 20, IFM_IEEE80211_MCS }, 1676 { 21, IFM_IEEE80211_MCS }, 1677 { 22, IFM_IEEE80211_MCS }, 1678 { 23, IFM_IEEE80211_MCS }, 1679 { 24, IFM_IEEE80211_MCS }, 1680 { 25, IFM_IEEE80211_MCS }, 1681 { 26, IFM_IEEE80211_MCS }, 1682 { 27, IFM_IEEE80211_MCS }, 1683 { 28, IFM_IEEE80211_MCS }, 1684 { 29, IFM_IEEE80211_MCS }, 1685 { 30, IFM_IEEE80211_MCS }, 1686 { 31, IFM_IEEE80211_MCS }, 1687 { 32, IFM_IEEE80211_MCS }, 1688 { 33, IFM_IEEE80211_MCS }, 1689 { 34, IFM_IEEE80211_MCS }, 1690 { 35, IFM_IEEE80211_MCS }, 1691 { 36, IFM_IEEE80211_MCS }, 1692 { 37, IFM_IEEE80211_MCS }, 1693 { 38, IFM_IEEE80211_MCS }, 1694 { 39, IFM_IEEE80211_MCS }, 1695 { 40, IFM_IEEE80211_MCS }, 1696 { 41, IFM_IEEE80211_MCS }, 1697 { 42, IFM_IEEE80211_MCS }, 1698 { 43, IFM_IEEE80211_MCS }, 1699 { 44, IFM_IEEE80211_MCS }, 1700 { 45, IFM_IEEE80211_MCS }, 1701 { 46, IFM_IEEE80211_MCS }, 1702 { 47, IFM_IEEE80211_MCS }, 1703 { 48, IFM_IEEE80211_MCS }, 1704 { 49, IFM_IEEE80211_MCS }, 1705 { 50, IFM_IEEE80211_MCS }, 1706 { 51, IFM_IEEE80211_MCS }, 1707 { 52, IFM_IEEE80211_MCS }, 1708 { 53, IFM_IEEE80211_MCS }, 1709 { 54, IFM_IEEE80211_MCS }, 1710 { 55, IFM_IEEE80211_MCS }, 1711 { 56, IFM_IEEE80211_MCS }, 1712 { 57, IFM_IEEE80211_MCS }, 1713 { 58, IFM_IEEE80211_MCS }, 1714 { 59, IFM_IEEE80211_MCS }, 1715 { 60, IFM_IEEE80211_MCS }, 1716 { 61, IFM_IEEE80211_MCS }, 1717 { 62, IFM_IEEE80211_MCS }, 1718 { 63, IFM_IEEE80211_MCS }, 1719 { 64, IFM_IEEE80211_MCS }, 1720 { 65, IFM_IEEE80211_MCS }, 1721 { 66, IFM_IEEE80211_MCS }, 1722 { 67, IFM_IEEE80211_MCS }, 1723 { 68, IFM_IEEE80211_MCS }, 1724 { 69, IFM_IEEE80211_MCS }, 1725 { 70, IFM_IEEE80211_MCS }, 1726 { 71, IFM_IEEE80211_MCS }, 1727 { 72, IFM_IEEE80211_MCS }, 1728 { 73, IFM_IEEE80211_MCS }, 1729 { 74, IFM_IEEE80211_MCS }, 1730 { 75, IFM_IEEE80211_MCS }, 1731 { 76, IFM_IEEE80211_MCS }, 1732 }; 1733 int m; 1734 1735 /* 1736 * Check 11n rates first for match as an MCS. 1737 */ 1738 if (mode == IEEE80211_MODE_11NA) { 1739 if (rate & IEEE80211_RATE_MCS) { 1740 rate &= ~IEEE80211_RATE_MCS; 1741 m = findmedia(htrates, nitems(htrates), rate); 1742 if (m != IFM_AUTO) 1743 return m | IFM_IEEE80211_11NA; 1744 } 1745 } else if (mode == IEEE80211_MODE_11NG) { 1746 /* NB: 12 is ambiguous, it will be treated as an MCS */ 1747 if (rate & IEEE80211_RATE_MCS) { 1748 rate &= ~IEEE80211_RATE_MCS; 1749 m = findmedia(htrates, nitems(htrates), rate); 1750 if (m != IFM_AUTO) 1751 return m | IFM_IEEE80211_11NG; 1752 } 1753 } 1754 rate &= IEEE80211_RATE_VAL; 1755 switch (mode) { 1756 case IEEE80211_MODE_11A: 1757 case IEEE80211_MODE_HALF: /* XXX good 'nuf */ 1758 case IEEE80211_MODE_QUARTER: 1759 case IEEE80211_MODE_11NA: 1760 case IEEE80211_MODE_TURBO_A: 1761 case IEEE80211_MODE_STURBO_A: 1762 return findmedia(rates, nitems(rates), 1763 rate | IFM_IEEE80211_11A); 1764 case IEEE80211_MODE_11B: 1765 return findmedia(rates, nitems(rates), 1766 rate | IFM_IEEE80211_11B); 1767 case IEEE80211_MODE_FH: 1768 return findmedia(rates, nitems(rates), 1769 rate | IFM_IEEE80211_FH); 1770 case IEEE80211_MODE_AUTO: 1771 /* NB: ic may be NULL for some drivers */ 1772 if (ic != NULL && ic->ic_phytype == IEEE80211_T_FH) 1773 return findmedia(rates, nitems(rates), 1774 rate | IFM_IEEE80211_FH); 1775 /* NB: hack, 11g matches both 11b+11a rates */ 1776 /* fall thru... */ 1777 case IEEE80211_MODE_11G: 1778 case IEEE80211_MODE_11NG: 1779 case IEEE80211_MODE_TURBO_G: 1780 return findmedia(rates, nitems(rates), rate | IFM_IEEE80211_11G); 1781 } 1782 return IFM_AUTO; 1783 } 1784 1785 int 1786 ieee80211_media2rate(int mword) 1787 { 1788 static const int ieeerates[] = { 1789 -1, /* IFM_AUTO */ 1790 0, /* IFM_MANUAL */ 1791 0, /* IFM_NONE */ 1792 2, /* IFM_IEEE80211_FH1 */ 1793 4, /* IFM_IEEE80211_FH2 */ 1794 2, /* IFM_IEEE80211_DS1 */ 1795 4, /* IFM_IEEE80211_DS2 */ 1796 11, /* IFM_IEEE80211_DS5 */ 1797 22, /* IFM_IEEE80211_DS11 */ 1798 44, /* IFM_IEEE80211_DS22 */ 1799 12, /* IFM_IEEE80211_OFDM6 */ 1800 18, /* IFM_IEEE80211_OFDM9 */ 1801 24, /* IFM_IEEE80211_OFDM12 */ 1802 36, /* IFM_IEEE80211_OFDM18 */ 1803 48, /* IFM_IEEE80211_OFDM24 */ 1804 72, /* IFM_IEEE80211_OFDM36 */ 1805 96, /* IFM_IEEE80211_OFDM48 */ 1806 108, /* IFM_IEEE80211_OFDM54 */ 1807 144, /* IFM_IEEE80211_OFDM72 */ 1808 0, /* IFM_IEEE80211_DS354k */ 1809 0, /* IFM_IEEE80211_DS512k */ 1810 6, /* IFM_IEEE80211_OFDM3 */ 1811 9, /* IFM_IEEE80211_OFDM4 */ 1812 54, /* IFM_IEEE80211_OFDM27 */ 1813 -1, /* IFM_IEEE80211_MCS */ 1814 }; 1815 return IFM_SUBTYPE(mword) < nitems(ieeerates) ? 1816 ieeerates[IFM_SUBTYPE(mword)] : 0; 1817 } 1818 1819 /* 1820 * The following hash function is adapted from "Hash Functions" by Bob Jenkins 1821 * ("Algorithm Alley", Dr. Dobbs Journal, September 1997). 1822 */ 1823 #define mix(a, b, c) \ 1824 do { \ 1825 a -= b; a -= c; a ^= (c >> 13); \ 1826 b -= c; b -= a; b ^= (a << 8); \ 1827 c -= a; c -= b; c ^= (b >> 13); \ 1828 a -= b; a -= c; a ^= (c >> 12); \ 1829 b -= c; b -= a; b ^= (a << 16); \ 1830 c -= a; c -= b; c ^= (b >> 5); \ 1831 a -= b; a -= c; a ^= (c >> 3); \ 1832 b -= c; b -= a; b ^= (a << 10); \ 1833 c -= a; c -= b; c ^= (b >> 15); \ 1834 } while (/*CONSTCOND*/0) 1835 1836 uint32_t 1837 ieee80211_mac_hash(const struct ieee80211com *ic, 1838 const uint8_t addr[IEEE80211_ADDR_LEN]) 1839 { 1840 uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = ic->ic_hash_key; 1841 1842 b += addr[5] << 8; 1843 b += addr[4]; 1844 a += addr[3] << 24; 1845 a += addr[2] << 16; 1846 a += addr[1] << 8; 1847 a += addr[0]; 1848 1849 mix(a, b, c); 1850 1851 return c; 1852 } 1853 #undef mix 1854