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_dl.h> 43 #include <net/if_media.h> 44 #include <net/if_types.h> 45 #include <net/ethernet.h> 46 47 #include <net80211/ieee80211_var.h> 48 #include <net80211/ieee80211_regdomain.h> 49 #ifdef IEEE80211_SUPPORT_SUPERG 50 #include <net80211/ieee80211_superg.h> 51 #endif 52 #include <net80211/ieee80211_ratectl.h> 53 54 #include <net/bpf.h> 55 56 const char *ieee80211_phymode_name[IEEE80211_MODE_MAX] = { 57 [IEEE80211_MODE_AUTO] = "auto", 58 [IEEE80211_MODE_11A] = "11a", 59 [IEEE80211_MODE_11B] = "11b", 60 [IEEE80211_MODE_11G] = "11g", 61 [IEEE80211_MODE_FH] = "FH", 62 [IEEE80211_MODE_TURBO_A] = "turboA", 63 [IEEE80211_MODE_TURBO_G] = "turboG", 64 [IEEE80211_MODE_STURBO_A] = "sturboA", 65 [IEEE80211_MODE_HALF] = "half", 66 [IEEE80211_MODE_QUARTER] = "quarter", 67 [IEEE80211_MODE_11NA] = "11na", 68 [IEEE80211_MODE_11NG] = "11ng", 69 }; 70 /* map ieee80211_opmode to the corresponding capability bit */ 71 const int ieee80211_opcap[IEEE80211_OPMODE_MAX] = { 72 [IEEE80211_M_IBSS] = IEEE80211_C_IBSS, 73 [IEEE80211_M_WDS] = IEEE80211_C_WDS, 74 [IEEE80211_M_STA] = IEEE80211_C_STA, 75 [IEEE80211_M_AHDEMO] = IEEE80211_C_AHDEMO, 76 [IEEE80211_M_HOSTAP] = IEEE80211_C_HOSTAP, 77 [IEEE80211_M_MONITOR] = IEEE80211_C_MONITOR, 78 #ifdef IEEE80211_SUPPORT_MESH 79 [IEEE80211_M_MBSS] = IEEE80211_C_MBSS, 80 #endif 81 }; 82 83 static const uint8_t ieee80211broadcastaddr[IEEE80211_ADDR_LEN] = 84 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 85 86 static void ieee80211_syncflag_locked(struct ieee80211com *ic, int flag); 87 static void ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag); 88 static void ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag); 89 static int ieee80211_media_setup(struct ieee80211com *ic, 90 struct ifmedia *media, int caps, int addsta, 91 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat); 92 static void ieee80211com_media_status(struct ifnet *, struct ifmediareq *); 93 static int ieee80211com_media_change(struct ifnet *); 94 static int media_status(enum ieee80211_opmode, 95 const struct ieee80211_channel *); 96 97 MALLOC_DEFINE(M_80211_VAP, "80211vap", "802.11 vap state"); 98 99 /* 100 * Default supported rates for 802.11 operation (in IEEE .5Mb units). 101 */ 102 #define B(r) ((r) | IEEE80211_RATE_BASIC) 103 static const struct ieee80211_rateset ieee80211_rateset_11a = 104 { 8, { B(12), 18, B(24), 36, B(48), 72, 96, 108 } }; 105 static const struct ieee80211_rateset ieee80211_rateset_half = 106 { 8, { B(6), 9, B(12), 18, B(24), 36, 48, 54 } }; 107 static const struct ieee80211_rateset ieee80211_rateset_quarter = 108 { 8, { B(3), 4, B(6), 9, B(12), 18, 24, 27 } }; 109 static const struct ieee80211_rateset ieee80211_rateset_11b = 110 { 4, { B(2), B(4), B(11), B(22) } }; 111 /* NB: OFDM rates are handled specially based on mode */ 112 static const struct ieee80211_rateset ieee80211_rateset_11g = 113 { 12, { B(2), B(4), B(11), B(22), 12, 18, 24, 36, 48, 72, 96, 108 } }; 114 #undef B 115 116 /* 117 * Fill in 802.11 available channel set, mark 118 * all available channels as active, and pick 119 * a default channel if not already specified. 120 */ 121 static void 122 ieee80211_chan_init(struct ieee80211com *ic) 123 { 124 #define DEFAULTRATES(m, def) do { \ 125 if (ic->ic_sup_rates[m].rs_nrates == 0) \ 126 ic->ic_sup_rates[m] = def; \ 127 } while (0) 128 struct ieee80211_channel *c; 129 int i; 130 131 KASSERT(0 < ic->ic_nchans && ic->ic_nchans <= IEEE80211_CHAN_MAX, 132 ("invalid number of channels specified: %u", ic->ic_nchans)); 133 memset(ic->ic_chan_avail, 0, sizeof(ic->ic_chan_avail)); 134 memset(ic->ic_modecaps, 0, sizeof(ic->ic_modecaps)); 135 setbit(ic->ic_modecaps, IEEE80211_MODE_AUTO); 136 for (i = 0; i < ic->ic_nchans; i++) { 137 c = &ic->ic_channels[i]; 138 KASSERT(c->ic_flags != 0, ("channel with no flags")); 139 /* 140 * Help drivers that work only with frequencies by filling 141 * in IEEE channel #'s if not already calculated. Note this 142 * mimics similar work done in ieee80211_setregdomain when 143 * changing regulatory state. 144 */ 145 if (c->ic_ieee == 0) 146 c->ic_ieee = ieee80211_mhz2ieee(c->ic_freq,c->ic_flags); 147 if (IEEE80211_IS_CHAN_HT40(c) && c->ic_extieee == 0) 148 c->ic_extieee = ieee80211_mhz2ieee(c->ic_freq + 149 (IEEE80211_IS_CHAN_HT40U(c) ? 20 : -20), 150 c->ic_flags); 151 /* default max tx power to max regulatory */ 152 if (c->ic_maxpower == 0) 153 c->ic_maxpower = 2*c->ic_maxregpower; 154 setbit(ic->ic_chan_avail, c->ic_ieee); 155 /* 156 * Identify mode capabilities. 157 */ 158 if (IEEE80211_IS_CHAN_A(c)) 159 setbit(ic->ic_modecaps, IEEE80211_MODE_11A); 160 if (IEEE80211_IS_CHAN_B(c)) 161 setbit(ic->ic_modecaps, IEEE80211_MODE_11B); 162 if (IEEE80211_IS_CHAN_ANYG(c)) 163 setbit(ic->ic_modecaps, IEEE80211_MODE_11G); 164 if (IEEE80211_IS_CHAN_FHSS(c)) 165 setbit(ic->ic_modecaps, IEEE80211_MODE_FH); 166 if (IEEE80211_IS_CHAN_108A(c)) 167 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_A); 168 if (IEEE80211_IS_CHAN_108G(c)) 169 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_G); 170 if (IEEE80211_IS_CHAN_ST(c)) 171 setbit(ic->ic_modecaps, IEEE80211_MODE_STURBO_A); 172 if (IEEE80211_IS_CHAN_HALF(c)) 173 setbit(ic->ic_modecaps, IEEE80211_MODE_HALF); 174 if (IEEE80211_IS_CHAN_QUARTER(c)) 175 setbit(ic->ic_modecaps, IEEE80211_MODE_QUARTER); 176 if (IEEE80211_IS_CHAN_HTA(c)) 177 setbit(ic->ic_modecaps, IEEE80211_MODE_11NA); 178 if (IEEE80211_IS_CHAN_HTG(c)) 179 setbit(ic->ic_modecaps, IEEE80211_MODE_11NG); 180 } 181 /* initialize candidate channels to all available */ 182 memcpy(ic->ic_chan_active, ic->ic_chan_avail, 183 sizeof(ic->ic_chan_avail)); 184 185 /* sort channel table to allow lookup optimizations */ 186 ieee80211_sort_channels(ic->ic_channels, ic->ic_nchans); 187 188 /* invalidate any previous state */ 189 ic->ic_bsschan = IEEE80211_CHAN_ANYC; 190 ic->ic_prevchan = NULL; 191 ic->ic_csa_newchan = NULL; 192 /* arbitrarily pick the first channel */ 193 ic->ic_curchan = &ic->ic_channels[0]; 194 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 195 196 /* fillin well-known rate sets if driver has not specified */ 197 DEFAULTRATES(IEEE80211_MODE_11B, ieee80211_rateset_11b); 198 DEFAULTRATES(IEEE80211_MODE_11G, ieee80211_rateset_11g); 199 DEFAULTRATES(IEEE80211_MODE_11A, ieee80211_rateset_11a); 200 DEFAULTRATES(IEEE80211_MODE_TURBO_A, ieee80211_rateset_11a); 201 DEFAULTRATES(IEEE80211_MODE_TURBO_G, ieee80211_rateset_11g); 202 DEFAULTRATES(IEEE80211_MODE_STURBO_A, ieee80211_rateset_11a); 203 DEFAULTRATES(IEEE80211_MODE_HALF, ieee80211_rateset_half); 204 DEFAULTRATES(IEEE80211_MODE_QUARTER, ieee80211_rateset_quarter); 205 DEFAULTRATES(IEEE80211_MODE_11NA, ieee80211_rateset_11a); 206 DEFAULTRATES(IEEE80211_MODE_11NG, ieee80211_rateset_11g); 207 208 /* 209 * Setup required information to fill the mcsset field, if driver did 210 * not. Assume a 2T2R setup for historic reasons. 211 */ 212 if (ic->ic_rxstream == 0) 213 ic->ic_rxstream = 2; 214 if (ic->ic_txstream == 0) 215 ic->ic_txstream = 2; 216 217 /* 218 * Set auto mode to reset active channel state and any desired channel. 219 */ 220 (void) ieee80211_setmode(ic, IEEE80211_MODE_AUTO); 221 #undef DEFAULTRATES 222 } 223 224 static void 225 null_update_mcast(struct ifnet *ifp) 226 { 227 if_printf(ifp, "need multicast update callback\n"); 228 } 229 230 static void 231 null_update_promisc(struct ifnet *ifp) 232 { 233 if_printf(ifp, "need promiscuous mode update callback\n"); 234 } 235 236 static int 237 null_transmit(struct ifnet *ifp, struct mbuf *m) 238 { 239 m_freem(m); 240 ifp->if_oerrors++; 241 return EACCES; /* XXX EIO/EPERM? */ 242 } 243 244 static int 245 null_output(struct ifnet *ifp, struct mbuf *m, 246 struct sockaddr *dst, struct route *ro) 247 { 248 if_printf(ifp, "discard raw packet\n"); 249 return null_transmit(ifp, m); 250 } 251 252 static void 253 null_input(struct ifnet *ifp, struct mbuf *m) 254 { 255 if_printf(ifp, "if_input should not be called\n"); 256 m_freem(m); 257 } 258 259 static void 260 null_update_chw(struct ieee80211com *ic) 261 { 262 263 if_printf(ic->ic_ifp, "%s: need callback\n", __func__); 264 } 265 266 /* 267 * Attach/setup the common net80211 state. Called by 268 * the driver on attach to prior to creating any vap's. 269 */ 270 void 271 ieee80211_ifattach(struct ieee80211com *ic, 272 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 273 { 274 struct ifnet *ifp = ic->ic_ifp; 275 struct sockaddr_dl *sdl; 276 struct ifaddr *ifa; 277 278 KASSERT(ifp->if_type == IFT_IEEE80211, ("if_type %d", ifp->if_type)); 279 280 IEEE80211_LOCK_INIT(ic, ifp->if_xname); 281 TAILQ_INIT(&ic->ic_vaps); 282 283 /* Create a taskqueue for all state changes */ 284 ic->ic_tq = taskqueue_create("ic_taskq", M_WAITOK | M_ZERO, 285 taskqueue_thread_enqueue, &ic->ic_tq); 286 taskqueue_start_threads(&ic->ic_tq, 1, PI_NET, "%s net80211 taskq", 287 ifp->if_xname); 288 /* 289 * Fill in 802.11 available channel set, mark all 290 * available channels as active, and pick a default 291 * channel if not already specified. 292 */ 293 ieee80211_media_init(ic); 294 295 ic->ic_update_mcast = null_update_mcast; 296 ic->ic_update_promisc = null_update_promisc; 297 ic->ic_update_chw = null_update_chw; 298 299 ic->ic_hash_key = arc4random(); 300 ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT; 301 ic->ic_lintval = ic->ic_bintval; 302 ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX; 303 304 ieee80211_crypto_attach(ic); 305 ieee80211_node_attach(ic); 306 ieee80211_power_attach(ic); 307 ieee80211_proto_attach(ic); 308 #ifdef IEEE80211_SUPPORT_SUPERG 309 ieee80211_superg_attach(ic); 310 #endif 311 ieee80211_ht_attach(ic); 312 ieee80211_scan_attach(ic); 313 ieee80211_regdomain_attach(ic); 314 ieee80211_dfs_attach(ic); 315 316 ieee80211_sysctl_attach(ic); 317 318 ifp->if_addrlen = IEEE80211_ADDR_LEN; 319 ifp->if_hdrlen = 0; 320 321 CURVNET_SET(vnet0); 322 323 if_attach(ifp); 324 325 ifp->if_mtu = IEEE80211_MTU_MAX; 326 ifp->if_broadcastaddr = ieee80211broadcastaddr; 327 ifp->if_output = null_output; 328 ifp->if_input = null_input; /* just in case */ 329 ifp->if_resolvemulti = NULL; /* NB: callers check */ 330 331 ifa = ifaddr_byindex(ifp->if_index); 332 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); 333 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 334 sdl->sdl_type = IFT_ETHER; /* XXX IFT_IEEE80211? */ 335 sdl->sdl_alen = IEEE80211_ADDR_LEN; 336 IEEE80211_ADDR_COPY(LLADDR(sdl), macaddr); 337 ifa_free(ifa); 338 339 CURVNET_RESTORE(); 340 } 341 342 /* 343 * Detach net80211 state on device detach. Tear down 344 * all vap's and reclaim all common state prior to the 345 * device state going away. Note we may call back into 346 * driver; it must be prepared for this. 347 */ 348 void 349 ieee80211_ifdetach(struct ieee80211com *ic) 350 { 351 struct ifnet *ifp = ic->ic_ifp; 352 struct ieee80211vap *vap; 353 354 /* 355 * This detaches the main interface, but not the vaps. 356 * Each VAP may be in a separate VIMAGE. 357 */ 358 CURVNET_SET(ifp->if_vnet); 359 if_detach(ifp); 360 CURVNET_RESTORE(); 361 362 /* 363 * The VAP is responsible for setting and clearing 364 * the VIMAGE context. 365 */ 366 while ((vap = TAILQ_FIRST(&ic->ic_vaps)) != NULL) 367 ieee80211_vap_destroy(vap); 368 ieee80211_waitfor_parent(ic); 369 370 ieee80211_sysctl_detach(ic); 371 ieee80211_dfs_detach(ic); 372 ieee80211_regdomain_detach(ic); 373 ieee80211_scan_detach(ic); 374 #ifdef IEEE80211_SUPPORT_SUPERG 375 ieee80211_superg_detach(ic); 376 #endif 377 ieee80211_ht_detach(ic); 378 /* NB: must be called before ieee80211_node_detach */ 379 ieee80211_proto_detach(ic); 380 ieee80211_crypto_detach(ic); 381 ieee80211_power_detach(ic); 382 ieee80211_node_detach(ic); 383 384 /* XXX VNET needed? */ 385 ifmedia_removeall(&ic->ic_media); 386 387 taskqueue_free(ic->ic_tq); 388 IEEE80211_LOCK_DESTROY(ic); 389 } 390 391 /* 392 * Default reset method for use with the ioctl support. This 393 * method is invoked after any state change in the 802.11 394 * layer that should be propagated to the hardware but not 395 * require re-initialization of the 802.11 state machine (e.g 396 * rescanning for an ap). We always return ENETRESET which 397 * should cause the driver to re-initialize the device. Drivers 398 * can override this method to implement more optimized support. 399 */ 400 static int 401 default_reset(struct ieee80211vap *vap, u_long cmd) 402 { 403 return ENETRESET; 404 } 405 406 /* 407 * Prepare a vap for use. Drivers use this call to 408 * setup net80211 state in new vap's prior attaching 409 * them with ieee80211_vap_attach (below). 410 */ 411 int 412 ieee80211_vap_setup(struct ieee80211com *ic, struct ieee80211vap *vap, 413 const char name[IFNAMSIZ], int unit, enum ieee80211_opmode opmode, 414 int flags, const uint8_t bssid[IEEE80211_ADDR_LEN], 415 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 416 { 417 struct ifnet *ifp; 418 419 ifp = if_alloc(IFT_ETHER); 420 if (ifp == NULL) { 421 if_printf(ic->ic_ifp, "%s: unable to allocate ifnet\n", 422 __func__); 423 return ENOMEM; 424 } 425 if_initname(ifp, name, unit); 426 ifp->if_softc = vap; /* back pointer */ 427 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 428 ifp->if_start = ieee80211_start; 429 ifp->if_ioctl = ieee80211_ioctl; 430 ifp->if_init = ieee80211_init; 431 /* NB: input+output filled in by ether_ifattach */ 432 IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen); 433 ifp->if_snd.ifq_drv_maxlen = ifqmaxlen; 434 IFQ_SET_READY(&ifp->if_snd); 435 436 vap->iv_ifp = ifp; 437 vap->iv_ic = ic; 438 vap->iv_flags = ic->ic_flags; /* propagate common flags */ 439 vap->iv_flags_ext = ic->ic_flags_ext; 440 vap->iv_flags_ven = ic->ic_flags_ven; 441 vap->iv_caps = ic->ic_caps &~ IEEE80211_C_OPMODE; 442 vap->iv_htcaps = ic->ic_htcaps; 443 vap->iv_htextcaps = ic->ic_htextcaps; 444 vap->iv_opmode = opmode; 445 vap->iv_caps |= ieee80211_opcap[opmode]; 446 switch (opmode) { 447 case IEEE80211_M_WDS: 448 /* 449 * WDS links must specify the bssid of the far end. 450 * For legacy operation this is a static relationship. 451 * For non-legacy operation the station must associate 452 * and be authorized to pass traffic. Plumbing the 453 * vap to the proper node happens when the vap 454 * transitions to RUN state. 455 */ 456 IEEE80211_ADDR_COPY(vap->iv_des_bssid, bssid); 457 vap->iv_flags |= IEEE80211_F_DESBSSID; 458 if (flags & IEEE80211_CLONE_WDSLEGACY) 459 vap->iv_flags_ext |= IEEE80211_FEXT_WDSLEGACY; 460 break; 461 #ifdef IEEE80211_SUPPORT_TDMA 462 case IEEE80211_M_AHDEMO: 463 if (flags & IEEE80211_CLONE_TDMA) { 464 /* NB: checked before clone operation allowed */ 465 KASSERT(ic->ic_caps & IEEE80211_C_TDMA, 466 ("not TDMA capable, ic_caps 0x%x", ic->ic_caps)); 467 /* 468 * Propagate TDMA capability to mark vap; this 469 * cannot be removed and is used to distinguish 470 * regular ahdemo operation from ahdemo+tdma. 471 */ 472 vap->iv_caps |= IEEE80211_C_TDMA; 473 } 474 break; 475 #endif 476 default: 477 break; 478 } 479 /* auto-enable s/w beacon miss support */ 480 if (flags & IEEE80211_CLONE_NOBEACONS) 481 vap->iv_flags_ext |= IEEE80211_FEXT_SWBMISS; 482 /* auto-generated or user supplied MAC address */ 483 if (flags & (IEEE80211_CLONE_BSSID|IEEE80211_CLONE_MACADDR)) 484 vap->iv_flags_ext |= IEEE80211_FEXT_UNIQMAC; 485 /* 486 * Enable various functionality by default if we're 487 * capable; the driver can override us if it knows better. 488 */ 489 if (vap->iv_caps & IEEE80211_C_WME) 490 vap->iv_flags |= IEEE80211_F_WME; 491 if (vap->iv_caps & IEEE80211_C_BURST) 492 vap->iv_flags |= IEEE80211_F_BURST; 493 /* NB: bg scanning only makes sense for station mode right now */ 494 if (vap->iv_opmode == IEEE80211_M_STA && 495 (vap->iv_caps & IEEE80211_C_BGSCAN)) 496 vap->iv_flags |= IEEE80211_F_BGSCAN; 497 vap->iv_flags |= IEEE80211_F_DOTH; /* XXX no cap, just ena */ 498 /* NB: DFS support only makes sense for ap mode right now */ 499 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 500 (vap->iv_caps & IEEE80211_C_DFS)) 501 vap->iv_flags_ext |= IEEE80211_FEXT_DFS; 502 503 vap->iv_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */ 504 vap->iv_bmissthreshold = IEEE80211_HWBMISS_DEFAULT; 505 vap->iv_dtim_period = IEEE80211_DTIM_DEFAULT; 506 /* 507 * Install a default reset method for the ioctl support; 508 * the driver can override this. 509 */ 510 vap->iv_reset = default_reset; 511 512 IEEE80211_ADDR_COPY(vap->iv_myaddr, macaddr); 513 514 ieee80211_sysctl_vattach(vap); 515 ieee80211_crypto_vattach(vap); 516 ieee80211_node_vattach(vap); 517 ieee80211_power_vattach(vap); 518 ieee80211_proto_vattach(vap); 519 #ifdef IEEE80211_SUPPORT_SUPERG 520 ieee80211_superg_vattach(vap); 521 #endif 522 ieee80211_ht_vattach(vap); 523 ieee80211_scan_vattach(vap); 524 ieee80211_regdomain_vattach(vap); 525 ieee80211_radiotap_vattach(vap); 526 ieee80211_ratectl_set(vap, IEEE80211_RATECTL_NONE); 527 528 return 0; 529 } 530 531 /* 532 * Activate a vap. State should have been prepared with a 533 * call to ieee80211_vap_setup and by the driver. On return 534 * from this call the vap is ready for use. 535 */ 536 int 537 ieee80211_vap_attach(struct ieee80211vap *vap, 538 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) 539 { 540 struct ifnet *ifp = vap->iv_ifp; 541 struct ieee80211com *ic = vap->iv_ic; 542 struct ifmediareq imr; 543 int maxrate; 544 545 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 546 "%s: %s parent %s flags 0x%x flags_ext 0x%x\n", 547 __func__, ieee80211_opmode_name[vap->iv_opmode], 548 ic->ic_ifp->if_xname, vap->iv_flags, vap->iv_flags_ext); 549 550 /* 551 * Do late attach work that cannot happen until after 552 * the driver has had a chance to override defaults. 553 */ 554 ieee80211_node_latevattach(vap); 555 ieee80211_power_latevattach(vap); 556 557 maxrate = ieee80211_media_setup(ic, &vap->iv_media, vap->iv_caps, 558 vap->iv_opmode == IEEE80211_M_STA, media_change, media_stat); 559 ieee80211_media_status(ifp, &imr); 560 /* NB: strip explicit mode; we're actually in autoselect */ 561 ifmedia_set(&vap->iv_media, 562 imr.ifm_active &~ (IFM_MMASK | IFM_IEEE80211_TURBO)); 563 if (maxrate) 564 ifp->if_baudrate = IF_Mbps(maxrate); 565 566 ether_ifattach(ifp, vap->iv_myaddr); 567 if (vap->iv_opmode == IEEE80211_M_MONITOR) { 568 /* NB: disallow transmit */ 569 ifp->if_transmit = null_transmit; 570 ifp->if_output = null_output; 571 } else { 572 /* hook output method setup by ether_ifattach */ 573 vap->iv_output = ifp->if_output; 574 ifp->if_output = ieee80211_output; 575 } 576 /* NB: if_mtu set by ether_ifattach to ETHERMTU */ 577 578 IEEE80211_LOCK(ic); 579 TAILQ_INSERT_TAIL(&ic->ic_vaps, vap, iv_next); 580 ieee80211_syncflag_locked(ic, IEEE80211_F_WME); 581 #ifdef IEEE80211_SUPPORT_SUPERG 582 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); 583 #endif 584 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); 585 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); 586 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT); 587 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40); 588 ieee80211_syncifflag_locked(ic, IFF_PROMISC); 589 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI); 590 IEEE80211_UNLOCK(ic); 591 592 return 1; 593 } 594 595 /* 596 * Tear down vap state and reclaim the ifnet. 597 * The driver is assumed to have prepared for 598 * this; e.g. by turning off interrupts for the 599 * underlying device. 600 */ 601 void 602 ieee80211_vap_detach(struct ieee80211vap *vap) 603 { 604 struct ieee80211com *ic = vap->iv_ic; 605 struct ifnet *ifp = vap->iv_ifp; 606 607 CURVNET_SET(ifp->if_vnet); 608 609 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s parent %s\n", 610 __func__, ieee80211_opmode_name[vap->iv_opmode], 611 ic->ic_ifp->if_xname); 612 613 /* NB: bpfdetach is called by ether_ifdetach and claims all taps */ 614 ether_ifdetach(ifp); 615 616 ieee80211_stop(vap); 617 618 /* 619 * Flush any deferred vap tasks. 620 */ 621 ieee80211_draintask(ic, &vap->iv_nstate_task); 622 ieee80211_draintask(ic, &vap->iv_swbmiss_task); 623 624 /* XXX band-aid until ifnet handles this for us */ 625 taskqueue_drain(taskqueue_swi, &ifp->if_linktask); 626 627 IEEE80211_LOCK(ic); 628 KASSERT(vap->iv_state == IEEE80211_S_INIT , ("vap still running")); 629 TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next); 630 ieee80211_syncflag_locked(ic, IEEE80211_F_WME); 631 #ifdef IEEE80211_SUPPORT_SUPERG 632 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); 633 #endif 634 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); 635 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); 636 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT); 637 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40); 638 /* NB: this handles the bpfdetach done below */ 639 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_BPF); 640 ieee80211_syncifflag_locked(ic, IFF_PROMISC); 641 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI); 642 IEEE80211_UNLOCK(ic); 643 644 ifmedia_removeall(&vap->iv_media); 645 646 ieee80211_radiotap_vdetach(vap); 647 ieee80211_regdomain_vdetach(vap); 648 ieee80211_scan_vdetach(vap); 649 #ifdef IEEE80211_SUPPORT_SUPERG 650 ieee80211_superg_vdetach(vap); 651 #endif 652 ieee80211_ht_vdetach(vap); 653 /* NB: must be before ieee80211_node_vdetach */ 654 ieee80211_proto_vdetach(vap); 655 ieee80211_crypto_vdetach(vap); 656 ieee80211_power_vdetach(vap); 657 ieee80211_node_vdetach(vap); 658 ieee80211_sysctl_vdetach(vap); 659 660 if_free(ifp); 661 662 CURVNET_RESTORE(); 663 } 664 665 /* 666 * Synchronize flag bit state in the parent ifnet structure 667 * according to the state of all vap ifnet's. This is used, 668 * for example, to handle IFF_PROMISC and IFF_ALLMULTI. 669 */ 670 void 671 ieee80211_syncifflag_locked(struct ieee80211com *ic, int flag) 672 { 673 struct ifnet *ifp = ic->ic_ifp; 674 struct ieee80211vap *vap; 675 int bit, oflags; 676 677 IEEE80211_LOCK_ASSERT(ic); 678 679 bit = 0; 680 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 681 if (vap->iv_ifp->if_flags & flag) { 682 /* 683 * XXX the bridge sets PROMISC but we don't want to 684 * enable it on the device, discard here so all the 685 * drivers don't need to special-case it 686 */ 687 if (flag == IFF_PROMISC && 688 !(vap->iv_opmode == IEEE80211_M_MONITOR || 689 (vap->iv_opmode == IEEE80211_M_AHDEMO && 690 (vap->iv_caps & IEEE80211_C_TDMA) == 0))) 691 continue; 692 bit = 1; 693 break; 694 } 695 oflags = ifp->if_flags; 696 if (bit) 697 ifp->if_flags |= flag; 698 else 699 ifp->if_flags &= ~flag; 700 if ((ifp->if_flags ^ oflags) & flag) { 701 /* XXX should we return 1/0 and let caller do this? */ 702 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 703 if (flag == IFF_PROMISC) 704 ieee80211_runtask(ic, &ic->ic_promisc_task); 705 else if (flag == IFF_ALLMULTI) 706 ieee80211_runtask(ic, &ic->ic_mcast_task); 707 } 708 } 709 } 710 711 /* 712 * Synchronize flag bit state in the com structure 713 * according to the state of all vap's. This is used, 714 * for example, to handle state changes via ioctls. 715 */ 716 static void 717 ieee80211_syncflag_locked(struct ieee80211com *ic, int flag) 718 { 719 struct ieee80211vap *vap; 720 int bit; 721 722 IEEE80211_LOCK_ASSERT(ic); 723 724 bit = 0; 725 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 726 if (vap->iv_flags & flag) { 727 bit = 1; 728 break; 729 } 730 if (bit) 731 ic->ic_flags |= flag; 732 else 733 ic->ic_flags &= ~flag; 734 } 735 736 void 737 ieee80211_syncflag(struct ieee80211vap *vap, int flag) 738 { 739 struct ieee80211com *ic = vap->iv_ic; 740 741 IEEE80211_LOCK(ic); 742 if (flag < 0) { 743 flag = -flag; 744 vap->iv_flags &= ~flag; 745 } else 746 vap->iv_flags |= flag; 747 ieee80211_syncflag_locked(ic, flag); 748 IEEE80211_UNLOCK(ic); 749 } 750 751 /* 752 * Synchronize flags_ht bit state in the com structure 753 * according to the state of all vap's. This is used, 754 * for example, to handle state changes via ioctls. 755 */ 756 static void 757 ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag) 758 { 759 struct ieee80211vap *vap; 760 int bit; 761 762 IEEE80211_LOCK_ASSERT(ic); 763 764 bit = 0; 765 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 766 if (vap->iv_flags_ht & flag) { 767 bit = 1; 768 break; 769 } 770 if (bit) 771 ic->ic_flags_ht |= flag; 772 else 773 ic->ic_flags_ht &= ~flag; 774 } 775 776 void 777 ieee80211_syncflag_ht(struct ieee80211vap *vap, int flag) 778 { 779 struct ieee80211com *ic = vap->iv_ic; 780 781 IEEE80211_LOCK(ic); 782 if (flag < 0) { 783 flag = -flag; 784 vap->iv_flags_ht &= ~flag; 785 } else 786 vap->iv_flags_ht |= flag; 787 ieee80211_syncflag_ht_locked(ic, flag); 788 IEEE80211_UNLOCK(ic); 789 } 790 791 /* 792 * Synchronize flags_ext bit state in the com structure 793 * according to the state of all vap's. This is used, 794 * for example, to handle state changes via ioctls. 795 */ 796 static void 797 ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag) 798 { 799 struct ieee80211vap *vap; 800 int bit; 801 802 IEEE80211_LOCK_ASSERT(ic); 803 804 bit = 0; 805 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 806 if (vap->iv_flags_ext & flag) { 807 bit = 1; 808 break; 809 } 810 if (bit) 811 ic->ic_flags_ext |= flag; 812 else 813 ic->ic_flags_ext &= ~flag; 814 } 815 816 void 817 ieee80211_syncflag_ext(struct ieee80211vap *vap, int flag) 818 { 819 struct ieee80211com *ic = vap->iv_ic; 820 821 IEEE80211_LOCK(ic); 822 if (flag < 0) { 823 flag = -flag; 824 vap->iv_flags_ext &= ~flag; 825 } else 826 vap->iv_flags_ext |= flag; 827 ieee80211_syncflag_ext_locked(ic, flag); 828 IEEE80211_UNLOCK(ic); 829 } 830 831 static __inline int 832 mapgsm(u_int freq, u_int flags) 833 { 834 freq *= 10; 835 if (flags & IEEE80211_CHAN_QUARTER) 836 freq += 5; 837 else if (flags & IEEE80211_CHAN_HALF) 838 freq += 10; 839 else 840 freq += 20; 841 /* NB: there is no 907/20 wide but leave room */ 842 return (freq - 906*10) / 5; 843 } 844 845 static __inline int 846 mappsb(u_int freq, u_int flags) 847 { 848 return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5; 849 } 850 851 /* 852 * Convert MHz frequency to IEEE channel number. 853 */ 854 int 855 ieee80211_mhz2ieee(u_int freq, u_int flags) 856 { 857 #define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990) 858 if (flags & IEEE80211_CHAN_GSM) 859 return mapgsm(freq, flags); 860 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 861 if (freq == 2484) 862 return 14; 863 if (freq < 2484) 864 return ((int) freq - 2407) / 5; 865 else 866 return 15 + ((freq - 2512) / 20); 867 } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */ 868 if (freq <= 5000) { 869 /* XXX check regdomain? */ 870 if (IS_FREQ_IN_PSB(freq)) 871 return mappsb(freq, flags); 872 return (freq - 4000) / 5; 873 } else 874 return (freq - 5000) / 5; 875 } else { /* either, guess */ 876 if (freq == 2484) 877 return 14; 878 if (freq < 2484) { 879 if (907 <= freq && freq <= 922) 880 return mapgsm(freq, flags); 881 return ((int) freq - 2407) / 5; 882 } 883 if (freq < 5000) { 884 if (IS_FREQ_IN_PSB(freq)) 885 return mappsb(freq, flags); 886 else if (freq > 4900) 887 return (freq - 4000) / 5; 888 else 889 return 15 + ((freq - 2512) / 20); 890 } 891 return (freq - 5000) / 5; 892 } 893 #undef IS_FREQ_IN_PSB 894 } 895 896 /* 897 * Convert channel to IEEE channel number. 898 */ 899 int 900 ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c) 901 { 902 if (c == NULL) { 903 if_printf(ic->ic_ifp, "invalid channel (NULL)\n"); 904 return 0; /* XXX */ 905 } 906 return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee); 907 } 908 909 /* 910 * Convert IEEE channel number to MHz frequency. 911 */ 912 u_int 913 ieee80211_ieee2mhz(u_int chan, u_int flags) 914 { 915 if (flags & IEEE80211_CHAN_GSM) 916 return 907 + 5 * (chan / 10); 917 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 918 if (chan == 14) 919 return 2484; 920 if (chan < 14) 921 return 2407 + chan*5; 922 else 923 return 2512 + ((chan-15)*20); 924 } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */ 925 if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) { 926 chan -= 37; 927 return 4940 + chan*5 + (chan % 5 ? 2 : 0); 928 } 929 return 5000 + (chan*5); 930 } else { /* either, guess */ 931 /* XXX can't distinguish PSB+GSM channels */ 932 if (chan == 14) 933 return 2484; 934 if (chan < 14) /* 0-13 */ 935 return 2407 + chan*5; 936 if (chan < 27) /* 15-26 */ 937 return 2512 + ((chan-15)*20); 938 return 5000 + (chan*5); 939 } 940 } 941 942 /* 943 * Locate a channel given a frequency+flags. We cache 944 * the previous lookup to optimize switching between two 945 * channels--as happens with dynamic turbo. 946 */ 947 struct ieee80211_channel * 948 ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags) 949 { 950 struct ieee80211_channel *c; 951 int i; 952 953 flags &= IEEE80211_CHAN_ALLTURBO; 954 c = ic->ic_prevchan; 955 if (c != NULL && c->ic_freq == freq && 956 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 957 return c; 958 /* brute force search */ 959 for (i = 0; i < ic->ic_nchans; i++) { 960 c = &ic->ic_channels[i]; 961 if (c->ic_freq == freq && 962 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 963 return c; 964 } 965 return NULL; 966 } 967 968 /* 969 * Locate a channel given a channel number+flags. We cache 970 * the previous lookup to optimize switching between two 971 * channels--as happens with dynamic turbo. 972 */ 973 struct ieee80211_channel * 974 ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags) 975 { 976 struct ieee80211_channel *c; 977 int i; 978 979 flags &= IEEE80211_CHAN_ALLTURBO; 980 c = ic->ic_prevchan; 981 if (c != NULL && c->ic_ieee == ieee && 982 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 983 return c; 984 /* brute force search */ 985 for (i = 0; i < ic->ic_nchans; i++) { 986 c = &ic->ic_channels[i]; 987 if (c->ic_ieee == ieee && 988 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 989 return c; 990 } 991 return NULL; 992 } 993 994 static void 995 addmedia(struct ifmedia *media, int caps, int addsta, int mode, int mword) 996 { 997 #define ADD(_ic, _s, _o) \ 998 ifmedia_add(media, \ 999 IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL) 1000 static const u_int mopts[IEEE80211_MODE_MAX] = { 1001 [IEEE80211_MODE_AUTO] = IFM_AUTO, 1002 [IEEE80211_MODE_11A] = IFM_IEEE80211_11A, 1003 [IEEE80211_MODE_11B] = IFM_IEEE80211_11B, 1004 [IEEE80211_MODE_11G] = IFM_IEEE80211_11G, 1005 [IEEE80211_MODE_FH] = IFM_IEEE80211_FH, 1006 [IEEE80211_MODE_TURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO, 1007 [IEEE80211_MODE_TURBO_G] = IFM_IEEE80211_11G|IFM_IEEE80211_TURBO, 1008 [IEEE80211_MODE_STURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO, 1009 [IEEE80211_MODE_HALF] = IFM_IEEE80211_11A, /* XXX */ 1010 [IEEE80211_MODE_QUARTER] = IFM_IEEE80211_11A, /* XXX */ 1011 [IEEE80211_MODE_11NA] = IFM_IEEE80211_11NA, 1012 [IEEE80211_MODE_11NG] = IFM_IEEE80211_11NG, 1013 }; 1014 u_int mopt; 1015 1016 mopt = mopts[mode]; 1017 if (addsta) 1018 ADD(ic, mword, mopt); /* STA mode has no cap */ 1019 if (caps & IEEE80211_C_IBSS) 1020 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC); 1021 if (caps & IEEE80211_C_HOSTAP) 1022 ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP); 1023 if (caps & IEEE80211_C_AHDEMO) 1024 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0); 1025 if (caps & IEEE80211_C_MONITOR) 1026 ADD(media, mword, mopt | IFM_IEEE80211_MONITOR); 1027 if (caps & IEEE80211_C_WDS) 1028 ADD(media, mword, mopt | IFM_IEEE80211_WDS); 1029 if (caps & IEEE80211_C_MBSS) 1030 ADD(media, mword, mopt | IFM_IEEE80211_MBSS); 1031 #undef ADD 1032 } 1033 1034 /* 1035 * Setup the media data structures according to the channel and 1036 * rate tables. 1037 */ 1038 static int 1039 ieee80211_media_setup(struct ieee80211com *ic, 1040 struct ifmedia *media, int caps, int addsta, 1041 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) 1042 { 1043 int i, j, rate, maxrate, mword, r; 1044 enum ieee80211_phymode mode; 1045 const struct ieee80211_rateset *rs; 1046 struct ieee80211_rateset allrates; 1047 1048 /* 1049 * Fill in media characteristics. 1050 */ 1051 ifmedia_init(media, 0, media_change, media_stat); 1052 maxrate = 0; 1053 /* 1054 * Add media for legacy operating modes. 1055 */ 1056 memset(&allrates, 0, sizeof(allrates)); 1057 for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) { 1058 if (isclr(ic->ic_modecaps, mode)) 1059 continue; 1060 addmedia(media, caps, addsta, mode, IFM_AUTO); 1061 if (mode == IEEE80211_MODE_AUTO) 1062 continue; 1063 rs = &ic->ic_sup_rates[mode]; 1064 for (i = 0; i < rs->rs_nrates; i++) { 1065 rate = rs->rs_rates[i]; 1066 mword = ieee80211_rate2media(ic, rate, mode); 1067 if (mword == 0) 1068 continue; 1069 addmedia(media, caps, addsta, mode, mword); 1070 /* 1071 * Add legacy rate to the collection of all rates. 1072 */ 1073 r = rate & IEEE80211_RATE_VAL; 1074 for (j = 0; j < allrates.rs_nrates; j++) 1075 if (allrates.rs_rates[j] == r) 1076 break; 1077 if (j == allrates.rs_nrates) { 1078 /* unique, add to the set */ 1079 allrates.rs_rates[j] = r; 1080 allrates.rs_nrates++; 1081 } 1082 rate = (rate & IEEE80211_RATE_VAL) / 2; 1083 if (rate > maxrate) 1084 maxrate = rate; 1085 } 1086 } 1087 for (i = 0; i < allrates.rs_nrates; i++) { 1088 mword = ieee80211_rate2media(ic, allrates.rs_rates[i], 1089 IEEE80211_MODE_AUTO); 1090 if (mword == 0) 1091 continue; 1092 /* NB: remove media options from mword */ 1093 addmedia(media, caps, addsta, 1094 IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword)); 1095 } 1096 /* 1097 * Add HT/11n media. Note that we do not have enough 1098 * bits in the media subtype to express the MCS so we 1099 * use a "placeholder" media subtype and any fixed MCS 1100 * must be specified with a different mechanism. 1101 */ 1102 for (; mode <= IEEE80211_MODE_11NG; mode++) { 1103 if (isclr(ic->ic_modecaps, mode)) 1104 continue; 1105 addmedia(media, caps, addsta, mode, IFM_AUTO); 1106 addmedia(media, caps, addsta, mode, IFM_IEEE80211_MCS); 1107 } 1108 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) || 1109 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) { 1110 addmedia(media, caps, addsta, 1111 IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS); 1112 i = ic->ic_txstream * 8 - 1; 1113 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) && 1114 (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI40)) 1115 rate = ieee80211_htrates[i].ht40_rate_400ns; 1116 else if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40)) 1117 rate = ieee80211_htrates[i].ht40_rate_800ns; 1118 else if ((ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI20)) 1119 rate = ieee80211_htrates[i].ht20_rate_400ns; 1120 else 1121 rate = ieee80211_htrates[i].ht20_rate_800ns; 1122 if (rate > maxrate) 1123 maxrate = rate; 1124 } 1125 return maxrate; 1126 } 1127 1128 void 1129 ieee80211_media_init(struct ieee80211com *ic) 1130 { 1131 struct ifnet *ifp = ic->ic_ifp; 1132 int maxrate; 1133 1134 /* NB: this works because the structure is initialized to zero */ 1135 if (!LIST_EMPTY(&ic->ic_media.ifm_list)) { 1136 /* 1137 * We are re-initializing the channel list; clear 1138 * the existing media state as the media routines 1139 * don't suppress duplicates. 1140 */ 1141 ifmedia_removeall(&ic->ic_media); 1142 } 1143 ieee80211_chan_init(ic); 1144 1145 /* 1146 * Recalculate media settings in case new channel list changes 1147 * the set of available modes. 1148 */ 1149 maxrate = ieee80211_media_setup(ic, &ic->ic_media, ic->ic_caps, 1, 1150 ieee80211com_media_change, ieee80211com_media_status); 1151 /* NB: strip explicit mode; we're actually in autoselect */ 1152 ifmedia_set(&ic->ic_media, 1153 media_status(ic->ic_opmode, ic->ic_curchan) &~ 1154 (IFM_MMASK | IFM_IEEE80211_TURBO)); 1155 if (maxrate) 1156 ifp->if_baudrate = IF_Mbps(maxrate); 1157 1158 /* XXX need to propagate new media settings to vap's */ 1159 } 1160 1161 /* XXX inline or eliminate? */ 1162 const struct ieee80211_rateset * 1163 ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c) 1164 { 1165 /* XXX does this work for 11ng basic rates? */ 1166 return &ic->ic_sup_rates[ieee80211_chan2mode(c)]; 1167 } 1168 1169 void 1170 ieee80211_announce(struct ieee80211com *ic) 1171 { 1172 struct ifnet *ifp = ic->ic_ifp; 1173 int i, rate, mword; 1174 enum ieee80211_phymode mode; 1175 const struct ieee80211_rateset *rs; 1176 1177 /* NB: skip AUTO since it has no rates */ 1178 for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) { 1179 if (isclr(ic->ic_modecaps, mode)) 1180 continue; 1181 if_printf(ifp, "%s rates: ", ieee80211_phymode_name[mode]); 1182 rs = &ic->ic_sup_rates[mode]; 1183 for (i = 0; i < rs->rs_nrates; i++) { 1184 mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode); 1185 if (mword == 0) 1186 continue; 1187 rate = ieee80211_media2rate(mword); 1188 printf("%s%d%sMbps", (i != 0 ? " " : ""), 1189 rate / 2, ((rate & 0x1) != 0 ? ".5" : "")); 1190 } 1191 printf("\n"); 1192 } 1193 ieee80211_ht_announce(ic); 1194 } 1195 1196 void 1197 ieee80211_announce_channels(struct ieee80211com *ic) 1198 { 1199 const struct ieee80211_channel *c; 1200 char type; 1201 int i, cw; 1202 1203 printf("Chan Freq CW RegPwr MinPwr MaxPwr\n"); 1204 for (i = 0; i < ic->ic_nchans; i++) { 1205 c = &ic->ic_channels[i]; 1206 if (IEEE80211_IS_CHAN_ST(c)) 1207 type = 'S'; 1208 else if (IEEE80211_IS_CHAN_108A(c)) 1209 type = 'T'; 1210 else if (IEEE80211_IS_CHAN_108G(c)) 1211 type = 'G'; 1212 else if (IEEE80211_IS_CHAN_HT(c)) 1213 type = 'n'; 1214 else if (IEEE80211_IS_CHAN_A(c)) 1215 type = 'a'; 1216 else if (IEEE80211_IS_CHAN_ANYG(c)) 1217 type = 'g'; 1218 else if (IEEE80211_IS_CHAN_B(c)) 1219 type = 'b'; 1220 else 1221 type = 'f'; 1222 if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c)) 1223 cw = 40; 1224 else if (IEEE80211_IS_CHAN_HALF(c)) 1225 cw = 10; 1226 else if (IEEE80211_IS_CHAN_QUARTER(c)) 1227 cw = 5; 1228 else 1229 cw = 20; 1230 printf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n" 1231 , c->ic_ieee, c->ic_freq, type 1232 , cw 1233 , IEEE80211_IS_CHAN_HT40U(c) ? '+' : 1234 IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' ' 1235 , c->ic_maxregpower 1236 , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0 1237 , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0 1238 ); 1239 } 1240 } 1241 1242 static int 1243 media2mode(const struct ifmedia_entry *ime, uint32_t flags, uint16_t *mode) 1244 { 1245 switch (IFM_MODE(ime->ifm_media)) { 1246 case IFM_IEEE80211_11A: 1247 *mode = IEEE80211_MODE_11A; 1248 break; 1249 case IFM_IEEE80211_11B: 1250 *mode = IEEE80211_MODE_11B; 1251 break; 1252 case IFM_IEEE80211_11G: 1253 *mode = IEEE80211_MODE_11G; 1254 break; 1255 case IFM_IEEE80211_FH: 1256 *mode = IEEE80211_MODE_FH; 1257 break; 1258 case IFM_IEEE80211_11NA: 1259 *mode = IEEE80211_MODE_11NA; 1260 break; 1261 case IFM_IEEE80211_11NG: 1262 *mode = IEEE80211_MODE_11NG; 1263 break; 1264 case IFM_AUTO: 1265 *mode = IEEE80211_MODE_AUTO; 1266 break; 1267 default: 1268 return 0; 1269 } 1270 /* 1271 * Turbo mode is an ``option''. 1272 * XXX does not apply to AUTO 1273 */ 1274 if (ime->ifm_media & IFM_IEEE80211_TURBO) { 1275 if (*mode == IEEE80211_MODE_11A) { 1276 if (flags & IEEE80211_F_TURBOP) 1277 *mode = IEEE80211_MODE_TURBO_A; 1278 else 1279 *mode = IEEE80211_MODE_STURBO_A; 1280 } else if (*mode == IEEE80211_MODE_11G) 1281 *mode = IEEE80211_MODE_TURBO_G; 1282 else 1283 return 0; 1284 } 1285 /* XXX HT40 +/- */ 1286 return 1; 1287 } 1288 1289 /* 1290 * Handle a media change request on the underlying interface. 1291 */ 1292 int 1293 ieee80211com_media_change(struct ifnet *ifp) 1294 { 1295 return EINVAL; 1296 } 1297 1298 /* 1299 * Handle a media change request on the vap interface. 1300 */ 1301 int 1302 ieee80211_media_change(struct ifnet *ifp) 1303 { 1304 struct ieee80211vap *vap = ifp->if_softc; 1305 struct ifmedia_entry *ime = vap->iv_media.ifm_cur; 1306 uint16_t newmode; 1307 1308 if (!media2mode(ime, vap->iv_flags, &newmode)) 1309 return EINVAL; 1310 if (vap->iv_des_mode != newmode) { 1311 vap->iv_des_mode = newmode; 1312 /* XXX kick state machine if up+running */ 1313 } 1314 return 0; 1315 } 1316 1317 /* 1318 * Common code to calculate the media status word 1319 * from the operating mode and channel state. 1320 */ 1321 static int 1322 media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan) 1323 { 1324 int status; 1325 1326 status = IFM_IEEE80211; 1327 switch (opmode) { 1328 case IEEE80211_M_STA: 1329 break; 1330 case IEEE80211_M_IBSS: 1331 status |= IFM_IEEE80211_ADHOC; 1332 break; 1333 case IEEE80211_M_HOSTAP: 1334 status |= IFM_IEEE80211_HOSTAP; 1335 break; 1336 case IEEE80211_M_MONITOR: 1337 status |= IFM_IEEE80211_MONITOR; 1338 break; 1339 case IEEE80211_M_AHDEMO: 1340 status |= IFM_IEEE80211_ADHOC | IFM_FLAG0; 1341 break; 1342 case IEEE80211_M_WDS: 1343 status |= IFM_IEEE80211_WDS; 1344 break; 1345 case IEEE80211_M_MBSS: 1346 status |= IFM_IEEE80211_MBSS; 1347 break; 1348 } 1349 if (IEEE80211_IS_CHAN_HTA(chan)) { 1350 status |= IFM_IEEE80211_11NA; 1351 } else if (IEEE80211_IS_CHAN_HTG(chan)) { 1352 status |= IFM_IEEE80211_11NG; 1353 } else if (IEEE80211_IS_CHAN_A(chan)) { 1354 status |= IFM_IEEE80211_11A; 1355 } else if (IEEE80211_IS_CHAN_B(chan)) { 1356 status |= IFM_IEEE80211_11B; 1357 } else if (IEEE80211_IS_CHAN_ANYG(chan)) { 1358 status |= IFM_IEEE80211_11G; 1359 } else if (IEEE80211_IS_CHAN_FHSS(chan)) { 1360 status |= IFM_IEEE80211_FH; 1361 } 1362 /* XXX else complain? */ 1363 1364 if (IEEE80211_IS_CHAN_TURBO(chan)) 1365 status |= IFM_IEEE80211_TURBO; 1366 #if 0 1367 if (IEEE80211_IS_CHAN_HT20(chan)) 1368 status |= IFM_IEEE80211_HT20; 1369 if (IEEE80211_IS_CHAN_HT40(chan)) 1370 status |= IFM_IEEE80211_HT40; 1371 #endif 1372 return status; 1373 } 1374 1375 static void 1376 ieee80211com_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1377 { 1378 struct ieee80211com *ic = ifp->if_l2com; 1379 struct ieee80211vap *vap; 1380 1381 imr->ifm_status = IFM_AVALID; 1382 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1383 if (vap->iv_ifp->if_flags & IFF_UP) { 1384 imr->ifm_status |= IFM_ACTIVE; 1385 break; 1386 } 1387 imr->ifm_active = media_status(ic->ic_opmode, ic->ic_curchan); 1388 if (imr->ifm_status & IFM_ACTIVE) 1389 imr->ifm_current = imr->ifm_active; 1390 } 1391 1392 void 1393 ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1394 { 1395 struct ieee80211vap *vap = ifp->if_softc; 1396 struct ieee80211com *ic = vap->iv_ic; 1397 enum ieee80211_phymode mode; 1398 1399 imr->ifm_status = IFM_AVALID; 1400 /* 1401 * NB: use the current channel's mode to lock down a xmit 1402 * rate only when running; otherwise we may have a mismatch 1403 * in which case the rate will not be convertible. 1404 */ 1405 if (vap->iv_state == IEEE80211_S_RUN) { 1406 imr->ifm_status |= IFM_ACTIVE; 1407 mode = ieee80211_chan2mode(ic->ic_curchan); 1408 } else 1409 mode = IEEE80211_MODE_AUTO; 1410 imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan); 1411 /* 1412 * Calculate a current rate if possible. 1413 */ 1414 if (vap->iv_txparms[mode].ucastrate != IEEE80211_FIXED_RATE_NONE) { 1415 /* 1416 * A fixed rate is set, report that. 1417 */ 1418 imr->ifm_active |= ieee80211_rate2media(ic, 1419 vap->iv_txparms[mode].ucastrate, mode); 1420 } else if (vap->iv_opmode == IEEE80211_M_STA) { 1421 /* 1422 * In station mode report the current transmit rate. 1423 */ 1424 imr->ifm_active |= ieee80211_rate2media(ic, 1425 vap->iv_bss->ni_txrate, mode); 1426 } else 1427 imr->ifm_active |= IFM_AUTO; 1428 if (imr->ifm_status & IFM_ACTIVE) 1429 imr->ifm_current = imr->ifm_active; 1430 } 1431 1432 /* 1433 * Set the current phy mode and recalculate the active channel 1434 * set based on the available channels for this mode. Also 1435 * select a new default/current channel if the current one is 1436 * inappropriate for this mode. 1437 */ 1438 int 1439 ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode) 1440 { 1441 /* 1442 * Adjust basic rates in 11b/11g supported rate set. 1443 * Note that if operating on a hal/quarter rate channel 1444 * this is a noop as those rates sets are different 1445 * and used instead. 1446 */ 1447 if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B) 1448 ieee80211_setbasicrates(&ic->ic_sup_rates[mode], mode); 1449 1450 ic->ic_curmode = mode; 1451 ieee80211_reset_erp(ic); /* reset ERP state */ 1452 1453 return 0; 1454 } 1455 1456 /* 1457 * Return the phy mode for with the specified channel. 1458 */ 1459 enum ieee80211_phymode 1460 ieee80211_chan2mode(const struct ieee80211_channel *chan) 1461 { 1462 1463 if (IEEE80211_IS_CHAN_HTA(chan)) 1464 return IEEE80211_MODE_11NA; 1465 else if (IEEE80211_IS_CHAN_HTG(chan)) 1466 return IEEE80211_MODE_11NG; 1467 else if (IEEE80211_IS_CHAN_108G(chan)) 1468 return IEEE80211_MODE_TURBO_G; 1469 else if (IEEE80211_IS_CHAN_ST(chan)) 1470 return IEEE80211_MODE_STURBO_A; 1471 else if (IEEE80211_IS_CHAN_TURBO(chan)) 1472 return IEEE80211_MODE_TURBO_A; 1473 else if (IEEE80211_IS_CHAN_HALF(chan)) 1474 return IEEE80211_MODE_HALF; 1475 else if (IEEE80211_IS_CHAN_QUARTER(chan)) 1476 return IEEE80211_MODE_QUARTER; 1477 else if (IEEE80211_IS_CHAN_A(chan)) 1478 return IEEE80211_MODE_11A; 1479 else if (IEEE80211_IS_CHAN_ANYG(chan)) 1480 return IEEE80211_MODE_11G; 1481 else if (IEEE80211_IS_CHAN_B(chan)) 1482 return IEEE80211_MODE_11B; 1483 else if (IEEE80211_IS_CHAN_FHSS(chan)) 1484 return IEEE80211_MODE_FH; 1485 1486 /* NB: should not get here */ 1487 printf("%s: cannot map channel to mode; freq %u flags 0x%x\n", 1488 __func__, chan->ic_freq, chan->ic_flags); 1489 return IEEE80211_MODE_11B; 1490 } 1491 1492 struct ratemedia { 1493 u_int match; /* rate + mode */ 1494 u_int media; /* if_media rate */ 1495 }; 1496 1497 static int 1498 findmedia(const struct ratemedia rates[], int n, u_int match) 1499 { 1500 int i; 1501 1502 for (i = 0; i < n; i++) 1503 if (rates[i].match == match) 1504 return rates[i].media; 1505 return IFM_AUTO; 1506 } 1507 1508 /* 1509 * Convert IEEE80211 rate value to ifmedia subtype. 1510 * Rate is either a legacy rate in units of 0.5Mbps 1511 * or an MCS index. 1512 */ 1513 int 1514 ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode) 1515 { 1516 #define N(a) (sizeof(a) / sizeof(a[0])) 1517 static const struct ratemedia rates[] = { 1518 { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 }, 1519 { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 }, 1520 { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 }, 1521 { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 }, 1522 { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 }, 1523 { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 }, 1524 { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 }, 1525 { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 }, 1526 { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 }, 1527 { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 }, 1528 { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 }, 1529 { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 }, 1530 { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 }, 1531 { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 }, 1532 { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 }, 1533 { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 }, 1534 { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 }, 1535 { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 }, 1536 { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 }, 1537 { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 }, 1538 { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 }, 1539 { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 }, 1540 { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 }, 1541 { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 }, 1542 { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 }, 1543 { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 }, 1544 { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 }, 1545 { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 }, 1546 { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 }, 1547 { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 }, 1548 /* NB: OFDM72 doesn't realy exist so we don't handle it */ 1549 }; 1550 static const struct ratemedia htrates[] = { 1551 { 0, IFM_IEEE80211_MCS }, 1552 { 1, IFM_IEEE80211_MCS }, 1553 { 2, IFM_IEEE80211_MCS }, 1554 { 3, IFM_IEEE80211_MCS }, 1555 { 4, IFM_IEEE80211_MCS }, 1556 { 5, IFM_IEEE80211_MCS }, 1557 { 6, IFM_IEEE80211_MCS }, 1558 { 7, IFM_IEEE80211_MCS }, 1559 { 8, IFM_IEEE80211_MCS }, 1560 { 9, IFM_IEEE80211_MCS }, 1561 { 10, IFM_IEEE80211_MCS }, 1562 { 11, IFM_IEEE80211_MCS }, 1563 { 12, IFM_IEEE80211_MCS }, 1564 { 13, IFM_IEEE80211_MCS }, 1565 { 14, IFM_IEEE80211_MCS }, 1566 { 15, IFM_IEEE80211_MCS }, 1567 { 16, IFM_IEEE80211_MCS }, 1568 { 17, IFM_IEEE80211_MCS }, 1569 { 18, IFM_IEEE80211_MCS }, 1570 { 19, IFM_IEEE80211_MCS }, 1571 { 20, IFM_IEEE80211_MCS }, 1572 { 21, IFM_IEEE80211_MCS }, 1573 { 22, IFM_IEEE80211_MCS }, 1574 { 23, IFM_IEEE80211_MCS }, 1575 { 24, IFM_IEEE80211_MCS }, 1576 { 25, IFM_IEEE80211_MCS }, 1577 { 26, IFM_IEEE80211_MCS }, 1578 { 27, IFM_IEEE80211_MCS }, 1579 { 28, IFM_IEEE80211_MCS }, 1580 { 29, IFM_IEEE80211_MCS }, 1581 { 30, IFM_IEEE80211_MCS }, 1582 { 31, IFM_IEEE80211_MCS }, 1583 { 32, IFM_IEEE80211_MCS }, 1584 { 33, IFM_IEEE80211_MCS }, 1585 { 34, IFM_IEEE80211_MCS }, 1586 { 35, IFM_IEEE80211_MCS }, 1587 { 36, IFM_IEEE80211_MCS }, 1588 { 37, IFM_IEEE80211_MCS }, 1589 { 38, IFM_IEEE80211_MCS }, 1590 { 39, IFM_IEEE80211_MCS }, 1591 { 40, IFM_IEEE80211_MCS }, 1592 { 41, IFM_IEEE80211_MCS }, 1593 { 42, IFM_IEEE80211_MCS }, 1594 { 43, IFM_IEEE80211_MCS }, 1595 { 44, IFM_IEEE80211_MCS }, 1596 { 45, IFM_IEEE80211_MCS }, 1597 { 46, IFM_IEEE80211_MCS }, 1598 { 47, IFM_IEEE80211_MCS }, 1599 { 48, IFM_IEEE80211_MCS }, 1600 { 49, IFM_IEEE80211_MCS }, 1601 { 50, IFM_IEEE80211_MCS }, 1602 { 51, IFM_IEEE80211_MCS }, 1603 { 52, IFM_IEEE80211_MCS }, 1604 { 53, IFM_IEEE80211_MCS }, 1605 { 54, IFM_IEEE80211_MCS }, 1606 { 55, IFM_IEEE80211_MCS }, 1607 { 56, IFM_IEEE80211_MCS }, 1608 { 57, IFM_IEEE80211_MCS }, 1609 { 58, IFM_IEEE80211_MCS }, 1610 { 59, IFM_IEEE80211_MCS }, 1611 { 60, IFM_IEEE80211_MCS }, 1612 { 61, IFM_IEEE80211_MCS }, 1613 { 62, IFM_IEEE80211_MCS }, 1614 { 63, IFM_IEEE80211_MCS }, 1615 { 64, IFM_IEEE80211_MCS }, 1616 { 65, IFM_IEEE80211_MCS }, 1617 { 66, IFM_IEEE80211_MCS }, 1618 { 67, IFM_IEEE80211_MCS }, 1619 { 68, IFM_IEEE80211_MCS }, 1620 { 69, IFM_IEEE80211_MCS }, 1621 { 70, IFM_IEEE80211_MCS }, 1622 { 71, IFM_IEEE80211_MCS }, 1623 { 72, IFM_IEEE80211_MCS }, 1624 { 73, IFM_IEEE80211_MCS }, 1625 { 74, IFM_IEEE80211_MCS }, 1626 { 75, IFM_IEEE80211_MCS }, 1627 { 76, IFM_IEEE80211_MCS }, 1628 }; 1629 int m; 1630 1631 /* 1632 * Check 11n rates first for match as an MCS. 1633 */ 1634 if (mode == IEEE80211_MODE_11NA) { 1635 if (rate & IEEE80211_RATE_MCS) { 1636 rate &= ~IEEE80211_RATE_MCS; 1637 m = findmedia(htrates, N(htrates), rate); 1638 if (m != IFM_AUTO) 1639 return m | IFM_IEEE80211_11NA; 1640 } 1641 } else if (mode == IEEE80211_MODE_11NG) { 1642 /* NB: 12 is ambiguous, it will be treated as an MCS */ 1643 if (rate & IEEE80211_RATE_MCS) { 1644 rate &= ~IEEE80211_RATE_MCS; 1645 m = findmedia(htrates, N(htrates), rate); 1646 if (m != IFM_AUTO) 1647 return m | IFM_IEEE80211_11NG; 1648 } 1649 } 1650 rate &= IEEE80211_RATE_VAL; 1651 switch (mode) { 1652 case IEEE80211_MODE_11A: 1653 case IEEE80211_MODE_HALF: /* XXX good 'nuf */ 1654 case IEEE80211_MODE_QUARTER: 1655 case IEEE80211_MODE_11NA: 1656 case IEEE80211_MODE_TURBO_A: 1657 case IEEE80211_MODE_STURBO_A: 1658 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11A); 1659 case IEEE80211_MODE_11B: 1660 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11B); 1661 case IEEE80211_MODE_FH: 1662 return findmedia(rates, N(rates), rate | IFM_IEEE80211_FH); 1663 case IEEE80211_MODE_AUTO: 1664 /* NB: ic may be NULL for some drivers */ 1665 if (ic != NULL && ic->ic_phytype == IEEE80211_T_FH) 1666 return findmedia(rates, N(rates), 1667 rate | IFM_IEEE80211_FH); 1668 /* NB: hack, 11g matches both 11b+11a rates */ 1669 /* fall thru... */ 1670 case IEEE80211_MODE_11G: 1671 case IEEE80211_MODE_11NG: 1672 case IEEE80211_MODE_TURBO_G: 1673 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11G); 1674 } 1675 return IFM_AUTO; 1676 #undef N 1677 } 1678 1679 int 1680 ieee80211_media2rate(int mword) 1681 { 1682 #define N(a) (sizeof(a) / sizeof(a[0])) 1683 static const int ieeerates[] = { 1684 -1, /* IFM_AUTO */ 1685 0, /* IFM_MANUAL */ 1686 0, /* IFM_NONE */ 1687 2, /* IFM_IEEE80211_FH1 */ 1688 4, /* IFM_IEEE80211_FH2 */ 1689 2, /* IFM_IEEE80211_DS1 */ 1690 4, /* IFM_IEEE80211_DS2 */ 1691 11, /* IFM_IEEE80211_DS5 */ 1692 22, /* IFM_IEEE80211_DS11 */ 1693 44, /* IFM_IEEE80211_DS22 */ 1694 12, /* IFM_IEEE80211_OFDM6 */ 1695 18, /* IFM_IEEE80211_OFDM9 */ 1696 24, /* IFM_IEEE80211_OFDM12 */ 1697 36, /* IFM_IEEE80211_OFDM18 */ 1698 48, /* IFM_IEEE80211_OFDM24 */ 1699 72, /* IFM_IEEE80211_OFDM36 */ 1700 96, /* IFM_IEEE80211_OFDM48 */ 1701 108, /* IFM_IEEE80211_OFDM54 */ 1702 144, /* IFM_IEEE80211_OFDM72 */ 1703 0, /* IFM_IEEE80211_DS354k */ 1704 0, /* IFM_IEEE80211_DS512k */ 1705 6, /* IFM_IEEE80211_OFDM3 */ 1706 9, /* IFM_IEEE80211_OFDM4 */ 1707 54, /* IFM_IEEE80211_OFDM27 */ 1708 -1, /* IFM_IEEE80211_MCS */ 1709 }; 1710 return IFM_SUBTYPE(mword) < N(ieeerates) ? 1711 ieeerates[IFM_SUBTYPE(mword)] : 0; 1712 #undef N 1713 } 1714 1715 /* 1716 * The following hash function is adapted from "Hash Functions" by Bob Jenkins 1717 * ("Algorithm Alley", Dr. Dobbs Journal, September 1997). 1718 */ 1719 #define mix(a, b, c) \ 1720 do { \ 1721 a -= b; a -= c; a ^= (c >> 13); \ 1722 b -= c; b -= a; b ^= (a << 8); \ 1723 c -= a; c -= b; c ^= (b >> 13); \ 1724 a -= b; a -= c; a ^= (c >> 12); \ 1725 b -= c; b -= a; b ^= (a << 16); \ 1726 c -= a; c -= b; c ^= (b >> 5); \ 1727 a -= b; a -= c; a ^= (c >> 3); \ 1728 b -= c; b -= a; b ^= (a << 10); \ 1729 c -= a; c -= b; c ^= (b >> 15); \ 1730 } while (/*CONSTCOND*/0) 1731 1732 uint32_t 1733 ieee80211_mac_hash(const struct ieee80211com *ic, 1734 const uint8_t addr[IEEE80211_ADDR_LEN]) 1735 { 1736 uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = ic->ic_hash_key; 1737 1738 b += addr[5] << 8; 1739 b += addr[4]; 1740 a += addr[3] << 24; 1741 a += addr[2] << 16; 1742 a += addr[1] << 8; 1743 a += addr[0]; 1744 1745 mix(a, b, c); 1746 1747 return c; 1748 } 1749 #undef mix 1750