ieee80211.c revision 249925
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: head/sys/net80211/ieee80211.c 249925 2013-04-26 12:50:32Z glebius $"); 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 56const 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 */ 71const 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 83static const uint8_t ieee80211broadcastaddr[IEEE80211_ADDR_LEN] = 84 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 85 86static void ieee80211_syncflag_locked(struct ieee80211com *ic, int flag); 87static void ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag); 88static void ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag); 89static 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); 92static void ieee80211com_media_status(struct ifnet *, struct ifmediareq *); 93static int ieee80211com_media_change(struct ifnet *); 94static int media_status(enum ieee80211_opmode, 95 const struct ieee80211_channel *); 96 97MALLOC_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) 103static const struct ieee80211_rateset ieee80211_rateset_11a = 104 { 8, { B(12), 18, B(24), 36, B(48), 72, 96, 108 } }; 105static const struct ieee80211_rateset ieee80211_rateset_half = 106 { 8, { B(6), 9, B(12), 18, B(24), 36, 48, 54 } }; 107static const struct ieee80211_rateset ieee80211_rateset_quarter = 108 { 8, { B(3), 4, B(6), 9, B(12), 18, 24, 27 } }; 109static 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 */ 112static 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 */ 121static void 122ieee80211_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 224static void 225null_update_mcast(struct ifnet *ifp) 226{ 227 if_printf(ifp, "need multicast update callback\n"); 228} 229 230static void 231null_update_promisc(struct ifnet *ifp) 232{ 233 if_printf(ifp, "need promiscuous mode update callback\n"); 234} 235 236static int 237null_transmit(struct ifnet *ifp, struct mbuf *m) 238{ 239 m_freem(m); 240 ifp->if_oerrors++; 241 return EACCES; /* XXX EIO/EPERM? */ 242} 243 244static int 245null_output(struct ifnet *ifp, struct mbuf *m, 246 const struct sockaddr *dst, struct route *ro) 247{ 248 if_printf(ifp, "discard raw packet\n"); 249 return null_transmit(ifp, m); 250} 251 252static void 253null_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 259static void 260null_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 */ 270void 271ieee80211_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 IEEE80211_TX_LOCK_INIT(ic, ifp->if_xname); 282 TAILQ_INIT(&ic->ic_vaps); 283 284 /* Create a taskqueue for all state changes */ 285 ic->ic_tq = taskqueue_create("ic_taskq", M_WAITOK | M_ZERO, 286 taskqueue_thread_enqueue, &ic->ic_tq); 287 taskqueue_start_threads(&ic->ic_tq, 1, PI_NET, "%s net80211 taskq", 288 ifp->if_xname); 289 /* 290 * Fill in 802.11 available channel set, mark all 291 * available channels as active, and pick a default 292 * channel if not already specified. 293 */ 294 ieee80211_media_init(ic); 295 296 ic->ic_update_mcast = null_update_mcast; 297 ic->ic_update_promisc = null_update_promisc; 298 ic->ic_update_chw = null_update_chw; 299 300 ic->ic_hash_key = arc4random(); 301 ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT; 302 ic->ic_lintval = ic->ic_bintval; 303 ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX; 304 305 ieee80211_crypto_attach(ic); 306 ieee80211_node_attach(ic); 307 ieee80211_power_attach(ic); 308 ieee80211_proto_attach(ic); 309#ifdef IEEE80211_SUPPORT_SUPERG 310 ieee80211_superg_attach(ic); 311#endif 312 ieee80211_ht_attach(ic); 313 ieee80211_scan_attach(ic); 314 ieee80211_regdomain_attach(ic); 315 ieee80211_dfs_attach(ic); 316 317 ieee80211_sysctl_attach(ic); 318 319 ifp->if_addrlen = IEEE80211_ADDR_LEN; 320 ifp->if_hdrlen = 0; 321 322 CURVNET_SET(vnet0); 323 324 if_attach(ifp); 325 326 ifp->if_mtu = IEEE80211_MTU_MAX; 327 ifp->if_broadcastaddr = ieee80211broadcastaddr; 328 ifp->if_output = null_output; 329 ifp->if_input = null_input; /* just in case */ 330 ifp->if_resolvemulti = NULL; /* NB: callers check */ 331 332 ifa = ifaddr_byindex(ifp->if_index); 333 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); 334 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 335 sdl->sdl_type = IFT_ETHER; /* XXX IFT_IEEE80211? */ 336 sdl->sdl_alen = IEEE80211_ADDR_LEN; 337 IEEE80211_ADDR_COPY(LLADDR(sdl), macaddr); 338 ifa_free(ifa); 339 340 CURVNET_RESTORE(); 341} 342 343/* 344 * Detach net80211 state on device detach. Tear down 345 * all vap's and reclaim all common state prior to the 346 * device state going away. Note we may call back into 347 * driver; it must be prepared for this. 348 */ 349void 350ieee80211_ifdetach(struct ieee80211com *ic) 351{ 352 struct ifnet *ifp = ic->ic_ifp; 353 struct ieee80211vap *vap; 354 355 /* 356 * This detaches the main interface, but not the vaps. 357 * Each VAP may be in a separate VIMAGE. 358 */ 359 CURVNET_SET(ifp->if_vnet); 360 if_detach(ifp); 361 CURVNET_RESTORE(); 362 363 /* 364 * The VAP is responsible for setting and clearing 365 * the VIMAGE context. 366 */ 367 while ((vap = TAILQ_FIRST(&ic->ic_vaps)) != NULL) 368 ieee80211_vap_destroy(vap); 369 ieee80211_waitfor_parent(ic); 370 371 ieee80211_sysctl_detach(ic); 372 ieee80211_dfs_detach(ic); 373 ieee80211_regdomain_detach(ic); 374 ieee80211_scan_detach(ic); 375#ifdef IEEE80211_SUPPORT_SUPERG 376 ieee80211_superg_detach(ic); 377#endif 378 ieee80211_ht_detach(ic); 379 /* NB: must be called before ieee80211_node_detach */ 380 ieee80211_proto_detach(ic); 381 ieee80211_crypto_detach(ic); 382 ieee80211_power_detach(ic); 383 ieee80211_node_detach(ic); 384 385 /* XXX VNET needed? */ 386 ifmedia_removeall(&ic->ic_media); 387 388 taskqueue_free(ic->ic_tq); 389 IEEE80211_TX_LOCK_DESTROY(ic); 390 IEEE80211_LOCK_DESTROY(ic); 391} 392 393/* 394 * Default reset method for use with the ioctl support. This 395 * method is invoked after any state change in the 802.11 396 * layer that should be propagated to the hardware but not 397 * require re-initialization of the 802.11 state machine (e.g 398 * rescanning for an ap). We always return ENETRESET which 399 * should cause the driver to re-initialize the device. Drivers 400 * can override this method to implement more optimized support. 401 */ 402static int 403default_reset(struct ieee80211vap *vap, u_long cmd) 404{ 405 return ENETRESET; 406} 407 408/* 409 * Prepare a vap for use. Drivers use this call to 410 * setup net80211 state in new vap's prior attaching 411 * them with ieee80211_vap_attach (below). 412 */ 413int 414ieee80211_vap_setup(struct ieee80211com *ic, struct ieee80211vap *vap, 415 const char name[IFNAMSIZ], int unit, enum ieee80211_opmode opmode, 416 int flags, const uint8_t bssid[IEEE80211_ADDR_LEN], 417 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 418{ 419 struct ifnet *ifp; 420 421 ifp = if_alloc(IFT_ETHER); 422 if (ifp == NULL) { 423 if_printf(ic->ic_ifp, "%s: unable to allocate ifnet\n", 424 __func__); 425 return ENOMEM; 426 } 427 if_initname(ifp, name, unit); 428 ifp->if_softc = vap; /* back pointer */ 429 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 430 ifp->if_start = ieee80211_start; 431 ifp->if_ioctl = ieee80211_ioctl; 432 ifp->if_init = ieee80211_init; 433 /* NB: input+output filled in by ether_ifattach */ 434 IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen); 435 ifp->if_snd.ifq_drv_maxlen = ifqmaxlen; 436 IFQ_SET_READY(&ifp->if_snd); 437 438 vap->iv_ifp = ifp; 439 vap->iv_ic = ic; 440 vap->iv_flags = ic->ic_flags; /* propagate common flags */ 441 vap->iv_flags_ext = ic->ic_flags_ext; 442 vap->iv_flags_ven = ic->ic_flags_ven; 443 vap->iv_caps = ic->ic_caps &~ IEEE80211_C_OPMODE; 444 vap->iv_htcaps = ic->ic_htcaps; 445 vap->iv_htextcaps = ic->ic_htextcaps; 446 vap->iv_opmode = opmode; 447 vap->iv_caps |= ieee80211_opcap[opmode]; 448 switch (opmode) { 449 case IEEE80211_M_WDS: 450 /* 451 * WDS links must specify the bssid of the far end. 452 * For legacy operation this is a static relationship. 453 * For non-legacy operation the station must associate 454 * and be authorized to pass traffic. Plumbing the 455 * vap to the proper node happens when the vap 456 * transitions to RUN state. 457 */ 458 IEEE80211_ADDR_COPY(vap->iv_des_bssid, bssid); 459 vap->iv_flags |= IEEE80211_F_DESBSSID; 460 if (flags & IEEE80211_CLONE_WDSLEGACY) 461 vap->iv_flags_ext |= IEEE80211_FEXT_WDSLEGACY; 462 break; 463#ifdef IEEE80211_SUPPORT_TDMA 464 case IEEE80211_M_AHDEMO: 465 if (flags & IEEE80211_CLONE_TDMA) { 466 /* NB: checked before clone operation allowed */ 467 KASSERT(ic->ic_caps & IEEE80211_C_TDMA, 468 ("not TDMA capable, ic_caps 0x%x", ic->ic_caps)); 469 /* 470 * Propagate TDMA capability to mark vap; this 471 * cannot be removed and is used to distinguish 472 * regular ahdemo operation from ahdemo+tdma. 473 */ 474 vap->iv_caps |= IEEE80211_C_TDMA; 475 } 476 break; 477#endif 478 default: 479 break; 480 } 481 /* auto-enable s/w beacon miss support */ 482 if (flags & IEEE80211_CLONE_NOBEACONS) 483 vap->iv_flags_ext |= IEEE80211_FEXT_SWBMISS; 484 /* auto-generated or user supplied MAC address */ 485 if (flags & (IEEE80211_CLONE_BSSID|IEEE80211_CLONE_MACADDR)) 486 vap->iv_flags_ext |= IEEE80211_FEXT_UNIQMAC; 487 /* 488 * Enable various functionality by default if we're 489 * capable; the driver can override us if it knows better. 490 */ 491 if (vap->iv_caps & IEEE80211_C_WME) 492 vap->iv_flags |= IEEE80211_F_WME; 493 if (vap->iv_caps & IEEE80211_C_BURST) 494 vap->iv_flags |= IEEE80211_F_BURST; 495 /* NB: bg scanning only makes sense for station mode right now */ 496 if (vap->iv_opmode == IEEE80211_M_STA && 497 (vap->iv_caps & IEEE80211_C_BGSCAN)) 498 vap->iv_flags |= IEEE80211_F_BGSCAN; 499 vap->iv_flags |= IEEE80211_F_DOTH; /* XXX no cap, just ena */ 500 /* NB: DFS support only makes sense for ap mode right now */ 501 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 502 (vap->iv_caps & IEEE80211_C_DFS)) 503 vap->iv_flags_ext |= IEEE80211_FEXT_DFS; 504 505 vap->iv_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */ 506 vap->iv_bmissthreshold = IEEE80211_HWBMISS_DEFAULT; 507 vap->iv_dtim_period = IEEE80211_DTIM_DEFAULT; 508 /* 509 * Install a default reset method for the ioctl support; 510 * the driver can override this. 511 */ 512 vap->iv_reset = default_reset; 513 514 IEEE80211_ADDR_COPY(vap->iv_myaddr, macaddr); 515 516 ieee80211_sysctl_vattach(vap); 517 ieee80211_crypto_vattach(vap); 518 ieee80211_node_vattach(vap); 519 ieee80211_power_vattach(vap); 520 ieee80211_proto_vattach(vap); 521#ifdef IEEE80211_SUPPORT_SUPERG 522 ieee80211_superg_vattach(vap); 523#endif 524 ieee80211_ht_vattach(vap); 525 ieee80211_scan_vattach(vap); 526 ieee80211_regdomain_vattach(vap); 527 ieee80211_radiotap_vattach(vap); 528 ieee80211_ratectl_set(vap, IEEE80211_RATECTL_NONE); 529 530 return 0; 531} 532 533/* 534 * Activate a vap. State should have been prepared with a 535 * call to ieee80211_vap_setup and by the driver. On return 536 * from this call the vap is ready for use. 537 */ 538int 539ieee80211_vap_attach(struct ieee80211vap *vap, 540 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) 541{ 542 struct ifnet *ifp = vap->iv_ifp; 543 struct ieee80211com *ic = vap->iv_ic; 544 struct ifmediareq imr; 545 int maxrate; 546 547 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 548 "%s: %s parent %s flags 0x%x flags_ext 0x%x\n", 549 __func__, ieee80211_opmode_name[vap->iv_opmode], 550 ic->ic_ifp->if_xname, vap->iv_flags, vap->iv_flags_ext); 551 552 /* 553 * Do late attach work that cannot happen until after 554 * the driver has had a chance to override defaults. 555 */ 556 ieee80211_node_latevattach(vap); 557 ieee80211_power_latevattach(vap); 558 559 maxrate = ieee80211_media_setup(ic, &vap->iv_media, vap->iv_caps, 560 vap->iv_opmode == IEEE80211_M_STA, media_change, media_stat); 561 ieee80211_media_status(ifp, &imr); 562 /* NB: strip explicit mode; we're actually in autoselect */ 563 ifmedia_set(&vap->iv_media, 564 imr.ifm_active &~ (IFM_MMASK | IFM_IEEE80211_TURBO)); 565 if (maxrate) 566 ifp->if_baudrate = IF_Mbps(maxrate); 567 568 ether_ifattach(ifp, vap->iv_myaddr); 569 if (vap->iv_opmode == IEEE80211_M_MONITOR) { 570 /* NB: disallow transmit */ 571 ifp->if_transmit = null_transmit; 572 ifp->if_output = null_output; 573 } else { 574 /* hook output method setup by ether_ifattach */ 575 vap->iv_output = ifp->if_output; 576 ifp->if_output = ieee80211_output; 577 } 578 /* NB: if_mtu set by ether_ifattach to ETHERMTU */ 579 580 IEEE80211_LOCK(ic); 581 TAILQ_INSERT_TAIL(&ic->ic_vaps, vap, iv_next); 582 ieee80211_syncflag_locked(ic, IEEE80211_F_WME); 583#ifdef IEEE80211_SUPPORT_SUPERG 584 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); 585#endif 586 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); 587 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); 588 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT); 589 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40); 590 ieee80211_syncifflag_locked(ic, IFF_PROMISC); 591 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI); 592 IEEE80211_UNLOCK(ic); 593 594 return 1; 595} 596 597/* 598 * Tear down vap state and reclaim the ifnet. 599 * The driver is assumed to have prepared for 600 * this; e.g. by turning off interrupts for the 601 * underlying device. 602 */ 603void 604ieee80211_vap_detach(struct ieee80211vap *vap) 605{ 606 struct ieee80211com *ic = vap->iv_ic; 607 struct ifnet *ifp = vap->iv_ifp; 608 609 CURVNET_SET(ifp->if_vnet); 610 611 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s parent %s\n", 612 __func__, ieee80211_opmode_name[vap->iv_opmode], 613 ic->ic_ifp->if_xname); 614 615 /* NB: bpfdetach is called by ether_ifdetach and claims all taps */ 616 ether_ifdetach(ifp); 617 618 ieee80211_stop(vap); 619 620 /* 621 * Flush any deferred vap tasks. 622 */ 623 ieee80211_draintask(ic, &vap->iv_nstate_task); 624 ieee80211_draintask(ic, &vap->iv_swbmiss_task); 625 626 /* XXX band-aid until ifnet handles this for us */ 627 taskqueue_drain(taskqueue_swi, &ifp->if_linktask); 628 629 IEEE80211_LOCK(ic); 630 KASSERT(vap->iv_state == IEEE80211_S_INIT , ("vap still running")); 631 TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next); 632 ieee80211_syncflag_locked(ic, IEEE80211_F_WME); 633#ifdef IEEE80211_SUPPORT_SUPERG 634 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); 635#endif 636 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); 637 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); 638 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT); 639 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40); 640 /* NB: this handles the bpfdetach done below */ 641 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_BPF); 642 ieee80211_syncifflag_locked(ic, IFF_PROMISC); 643 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI); 644 IEEE80211_UNLOCK(ic); 645 646 ifmedia_removeall(&vap->iv_media); 647 648 ieee80211_radiotap_vdetach(vap); 649 ieee80211_regdomain_vdetach(vap); 650 ieee80211_scan_vdetach(vap); 651#ifdef IEEE80211_SUPPORT_SUPERG 652 ieee80211_superg_vdetach(vap); 653#endif 654 ieee80211_ht_vdetach(vap); 655 /* NB: must be before ieee80211_node_vdetach */ 656 ieee80211_proto_vdetach(vap); 657 ieee80211_crypto_vdetach(vap); 658 ieee80211_power_vdetach(vap); 659 ieee80211_node_vdetach(vap); 660 ieee80211_sysctl_vdetach(vap); 661 662 if_free(ifp); 663 664 CURVNET_RESTORE(); 665} 666 667/* 668 * Synchronize flag bit state in the parent ifnet structure 669 * according to the state of all vap ifnet's. This is used, 670 * for example, to handle IFF_PROMISC and IFF_ALLMULTI. 671 */ 672void 673ieee80211_syncifflag_locked(struct ieee80211com *ic, int flag) 674{ 675 struct ifnet *ifp = ic->ic_ifp; 676 struct ieee80211vap *vap; 677 int bit, oflags; 678 679 IEEE80211_LOCK_ASSERT(ic); 680 681 bit = 0; 682 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 683 if (vap->iv_ifp->if_flags & flag) { 684 /* 685 * XXX the bridge sets PROMISC but we don't want to 686 * enable it on the device, discard here so all the 687 * drivers don't need to special-case it 688 */ 689 if (flag == IFF_PROMISC && 690 !(vap->iv_opmode == IEEE80211_M_MONITOR || 691 (vap->iv_opmode == IEEE80211_M_AHDEMO && 692 (vap->iv_caps & IEEE80211_C_TDMA) == 0))) 693 continue; 694 bit = 1; 695 break; 696 } 697 oflags = ifp->if_flags; 698 if (bit) 699 ifp->if_flags |= flag; 700 else 701 ifp->if_flags &= ~flag; 702 if ((ifp->if_flags ^ oflags) & flag) { 703 /* XXX should we return 1/0 and let caller do this? */ 704 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 705 if (flag == IFF_PROMISC) 706 ieee80211_runtask(ic, &ic->ic_promisc_task); 707 else if (flag == IFF_ALLMULTI) 708 ieee80211_runtask(ic, &ic->ic_mcast_task); 709 } 710 } 711} 712 713/* 714 * Synchronize flag bit state in the com structure 715 * according to the state of all vap's. This is used, 716 * for example, to handle state changes via ioctls. 717 */ 718static void 719ieee80211_syncflag_locked(struct ieee80211com *ic, int flag) 720{ 721 struct ieee80211vap *vap; 722 int bit; 723 724 IEEE80211_LOCK_ASSERT(ic); 725 726 bit = 0; 727 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 728 if (vap->iv_flags & flag) { 729 bit = 1; 730 break; 731 } 732 if (bit) 733 ic->ic_flags |= flag; 734 else 735 ic->ic_flags &= ~flag; 736} 737 738void 739ieee80211_syncflag(struct ieee80211vap *vap, int flag) 740{ 741 struct ieee80211com *ic = vap->iv_ic; 742 743 IEEE80211_LOCK(ic); 744 if (flag < 0) { 745 flag = -flag; 746 vap->iv_flags &= ~flag; 747 } else 748 vap->iv_flags |= flag; 749 ieee80211_syncflag_locked(ic, flag); 750 IEEE80211_UNLOCK(ic); 751} 752 753/* 754 * Synchronize flags_ht bit state in the com structure 755 * according to the state of all vap's. This is used, 756 * for example, to handle state changes via ioctls. 757 */ 758static void 759ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag) 760{ 761 struct ieee80211vap *vap; 762 int bit; 763 764 IEEE80211_LOCK_ASSERT(ic); 765 766 bit = 0; 767 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 768 if (vap->iv_flags_ht & flag) { 769 bit = 1; 770 break; 771 } 772 if (bit) 773 ic->ic_flags_ht |= flag; 774 else 775 ic->ic_flags_ht &= ~flag; 776} 777 778void 779ieee80211_syncflag_ht(struct ieee80211vap *vap, int flag) 780{ 781 struct ieee80211com *ic = vap->iv_ic; 782 783 IEEE80211_LOCK(ic); 784 if (flag < 0) { 785 flag = -flag; 786 vap->iv_flags_ht &= ~flag; 787 } else 788 vap->iv_flags_ht |= flag; 789 ieee80211_syncflag_ht_locked(ic, flag); 790 IEEE80211_UNLOCK(ic); 791} 792 793/* 794 * Synchronize flags_ext bit state in the com structure 795 * according to the state of all vap's. This is used, 796 * for example, to handle state changes via ioctls. 797 */ 798static void 799ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag) 800{ 801 struct ieee80211vap *vap; 802 int bit; 803 804 IEEE80211_LOCK_ASSERT(ic); 805 806 bit = 0; 807 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 808 if (vap->iv_flags_ext & flag) { 809 bit = 1; 810 break; 811 } 812 if (bit) 813 ic->ic_flags_ext |= flag; 814 else 815 ic->ic_flags_ext &= ~flag; 816} 817 818void 819ieee80211_syncflag_ext(struct ieee80211vap *vap, int flag) 820{ 821 struct ieee80211com *ic = vap->iv_ic; 822 823 IEEE80211_LOCK(ic); 824 if (flag < 0) { 825 flag = -flag; 826 vap->iv_flags_ext &= ~flag; 827 } else 828 vap->iv_flags_ext |= flag; 829 ieee80211_syncflag_ext_locked(ic, flag); 830 IEEE80211_UNLOCK(ic); 831} 832 833static __inline int 834mapgsm(u_int freq, u_int flags) 835{ 836 freq *= 10; 837 if (flags & IEEE80211_CHAN_QUARTER) 838 freq += 5; 839 else if (flags & IEEE80211_CHAN_HALF) 840 freq += 10; 841 else 842 freq += 20; 843 /* NB: there is no 907/20 wide but leave room */ 844 return (freq - 906*10) / 5; 845} 846 847static __inline int 848mappsb(u_int freq, u_int flags) 849{ 850 return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5; 851} 852 853/* 854 * Convert MHz frequency to IEEE channel number. 855 */ 856int 857ieee80211_mhz2ieee(u_int freq, u_int flags) 858{ 859#define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990) 860 if (flags & IEEE80211_CHAN_GSM) 861 return mapgsm(freq, flags); 862 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 863 if (freq == 2484) 864 return 14; 865 if (freq < 2484) 866 return ((int) freq - 2407) / 5; 867 else 868 return 15 + ((freq - 2512) / 20); 869 } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */ 870 if (freq <= 5000) { 871 /* XXX check regdomain? */ 872 if (IS_FREQ_IN_PSB(freq)) 873 return mappsb(freq, flags); 874 return (freq - 4000) / 5; 875 } else 876 return (freq - 5000) / 5; 877 } else { /* either, guess */ 878 if (freq == 2484) 879 return 14; 880 if (freq < 2484) { 881 if (907 <= freq && freq <= 922) 882 return mapgsm(freq, flags); 883 return ((int) freq - 2407) / 5; 884 } 885 if (freq < 5000) { 886 if (IS_FREQ_IN_PSB(freq)) 887 return mappsb(freq, flags); 888 else if (freq > 4900) 889 return (freq - 4000) / 5; 890 else 891 return 15 + ((freq - 2512) / 20); 892 } 893 return (freq - 5000) / 5; 894 } 895#undef IS_FREQ_IN_PSB 896} 897 898/* 899 * Convert channel to IEEE channel number. 900 */ 901int 902ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c) 903{ 904 if (c == NULL) { 905 if_printf(ic->ic_ifp, "invalid channel (NULL)\n"); 906 return 0; /* XXX */ 907 } 908 return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee); 909} 910 911/* 912 * Convert IEEE channel number to MHz frequency. 913 */ 914u_int 915ieee80211_ieee2mhz(u_int chan, u_int flags) 916{ 917 if (flags & IEEE80211_CHAN_GSM) 918 return 907 + 5 * (chan / 10); 919 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 920 if (chan == 14) 921 return 2484; 922 if (chan < 14) 923 return 2407 + chan*5; 924 else 925 return 2512 + ((chan-15)*20); 926 } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */ 927 if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) { 928 chan -= 37; 929 return 4940 + chan*5 + (chan % 5 ? 2 : 0); 930 } 931 return 5000 + (chan*5); 932 } else { /* either, guess */ 933 /* XXX can't distinguish PSB+GSM channels */ 934 if (chan == 14) 935 return 2484; 936 if (chan < 14) /* 0-13 */ 937 return 2407 + chan*5; 938 if (chan < 27) /* 15-26 */ 939 return 2512 + ((chan-15)*20); 940 return 5000 + (chan*5); 941 } 942} 943 944/* 945 * Locate a channel given a frequency+flags. We cache 946 * the previous lookup to optimize switching between two 947 * channels--as happens with dynamic turbo. 948 */ 949struct ieee80211_channel * 950ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags) 951{ 952 struct ieee80211_channel *c; 953 int i; 954 955 flags &= IEEE80211_CHAN_ALLTURBO; 956 c = ic->ic_prevchan; 957 if (c != NULL && c->ic_freq == freq && 958 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 959 return c; 960 /* brute force search */ 961 for (i = 0; i < ic->ic_nchans; i++) { 962 c = &ic->ic_channels[i]; 963 if (c->ic_freq == freq && 964 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 965 return c; 966 } 967 return NULL; 968} 969 970/* 971 * Locate a channel given a channel number+flags. We cache 972 * the previous lookup to optimize switching between two 973 * channels--as happens with dynamic turbo. 974 */ 975struct ieee80211_channel * 976ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags) 977{ 978 struct ieee80211_channel *c; 979 int i; 980 981 flags &= IEEE80211_CHAN_ALLTURBO; 982 c = ic->ic_prevchan; 983 if (c != NULL && c->ic_ieee == ieee && 984 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 985 return c; 986 /* brute force search */ 987 for (i = 0; i < ic->ic_nchans; i++) { 988 c = &ic->ic_channels[i]; 989 if (c->ic_ieee == ieee && 990 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 991 return c; 992 } 993 return NULL; 994} 995 996static void 997addmedia(struct ifmedia *media, int caps, int addsta, int mode, int mword) 998{ 999#define ADD(_ic, _s, _o) \ 1000 ifmedia_add(media, \ 1001 IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL) 1002 static const u_int mopts[IEEE80211_MODE_MAX] = { 1003 [IEEE80211_MODE_AUTO] = IFM_AUTO, 1004 [IEEE80211_MODE_11A] = IFM_IEEE80211_11A, 1005 [IEEE80211_MODE_11B] = IFM_IEEE80211_11B, 1006 [IEEE80211_MODE_11G] = IFM_IEEE80211_11G, 1007 [IEEE80211_MODE_FH] = IFM_IEEE80211_FH, 1008 [IEEE80211_MODE_TURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO, 1009 [IEEE80211_MODE_TURBO_G] = IFM_IEEE80211_11G|IFM_IEEE80211_TURBO, 1010 [IEEE80211_MODE_STURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO, 1011 [IEEE80211_MODE_HALF] = IFM_IEEE80211_11A, /* XXX */ 1012 [IEEE80211_MODE_QUARTER] = IFM_IEEE80211_11A, /* XXX */ 1013 [IEEE80211_MODE_11NA] = IFM_IEEE80211_11NA, 1014 [IEEE80211_MODE_11NG] = IFM_IEEE80211_11NG, 1015 }; 1016 u_int mopt; 1017 1018 mopt = mopts[mode]; 1019 if (addsta) 1020 ADD(ic, mword, mopt); /* STA mode has no cap */ 1021 if (caps & IEEE80211_C_IBSS) 1022 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC); 1023 if (caps & IEEE80211_C_HOSTAP) 1024 ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP); 1025 if (caps & IEEE80211_C_AHDEMO) 1026 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0); 1027 if (caps & IEEE80211_C_MONITOR) 1028 ADD(media, mword, mopt | IFM_IEEE80211_MONITOR); 1029 if (caps & IEEE80211_C_WDS) 1030 ADD(media, mword, mopt | IFM_IEEE80211_WDS); 1031 if (caps & IEEE80211_C_MBSS) 1032 ADD(media, mword, mopt | IFM_IEEE80211_MBSS); 1033#undef ADD 1034} 1035 1036/* 1037 * Setup the media data structures according to the channel and 1038 * rate tables. 1039 */ 1040static int 1041ieee80211_media_setup(struct ieee80211com *ic, 1042 struct ifmedia *media, int caps, int addsta, 1043 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) 1044{ 1045 int i, j, rate, maxrate, mword, r; 1046 enum ieee80211_phymode mode; 1047 const struct ieee80211_rateset *rs; 1048 struct ieee80211_rateset allrates; 1049 1050 /* 1051 * Fill in media characteristics. 1052 */ 1053 ifmedia_init(media, 0, media_change, media_stat); 1054 maxrate = 0; 1055 /* 1056 * Add media for legacy operating modes. 1057 */ 1058 memset(&allrates, 0, sizeof(allrates)); 1059 for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) { 1060 if (isclr(ic->ic_modecaps, mode)) 1061 continue; 1062 addmedia(media, caps, addsta, mode, IFM_AUTO); 1063 if (mode == IEEE80211_MODE_AUTO) 1064 continue; 1065 rs = &ic->ic_sup_rates[mode]; 1066 for (i = 0; i < rs->rs_nrates; i++) { 1067 rate = rs->rs_rates[i]; 1068 mword = ieee80211_rate2media(ic, rate, mode); 1069 if (mword == 0) 1070 continue; 1071 addmedia(media, caps, addsta, mode, mword); 1072 /* 1073 * Add legacy rate to the collection of all rates. 1074 */ 1075 r = rate & IEEE80211_RATE_VAL; 1076 for (j = 0; j < allrates.rs_nrates; j++) 1077 if (allrates.rs_rates[j] == r) 1078 break; 1079 if (j == allrates.rs_nrates) { 1080 /* unique, add to the set */ 1081 allrates.rs_rates[j] = r; 1082 allrates.rs_nrates++; 1083 } 1084 rate = (rate & IEEE80211_RATE_VAL) / 2; 1085 if (rate > maxrate) 1086 maxrate = rate; 1087 } 1088 } 1089 for (i = 0; i < allrates.rs_nrates; i++) { 1090 mword = ieee80211_rate2media(ic, allrates.rs_rates[i], 1091 IEEE80211_MODE_AUTO); 1092 if (mword == 0) 1093 continue; 1094 /* NB: remove media options from mword */ 1095 addmedia(media, caps, addsta, 1096 IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword)); 1097 } 1098 /* 1099 * Add HT/11n media. Note that we do not have enough 1100 * bits in the media subtype to express the MCS so we 1101 * use a "placeholder" media subtype and any fixed MCS 1102 * must be specified with a different mechanism. 1103 */ 1104 for (; mode <= IEEE80211_MODE_11NG; mode++) { 1105 if (isclr(ic->ic_modecaps, mode)) 1106 continue; 1107 addmedia(media, caps, addsta, mode, IFM_AUTO); 1108 addmedia(media, caps, addsta, mode, IFM_IEEE80211_MCS); 1109 } 1110 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) || 1111 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) { 1112 addmedia(media, caps, addsta, 1113 IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS); 1114 i = ic->ic_txstream * 8 - 1; 1115 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) && 1116 (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI40)) 1117 rate = ieee80211_htrates[i].ht40_rate_400ns; 1118 else if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40)) 1119 rate = ieee80211_htrates[i].ht40_rate_800ns; 1120 else if ((ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI20)) 1121 rate = ieee80211_htrates[i].ht20_rate_400ns; 1122 else 1123 rate = ieee80211_htrates[i].ht20_rate_800ns; 1124 if (rate > maxrate) 1125 maxrate = rate; 1126 } 1127 return maxrate; 1128} 1129 1130void 1131ieee80211_media_init(struct ieee80211com *ic) 1132{ 1133 struct ifnet *ifp = ic->ic_ifp; 1134 int maxrate; 1135 1136 /* NB: this works because the structure is initialized to zero */ 1137 if (!LIST_EMPTY(&ic->ic_media.ifm_list)) { 1138 /* 1139 * We are re-initializing the channel list; clear 1140 * the existing media state as the media routines 1141 * don't suppress duplicates. 1142 */ 1143 ifmedia_removeall(&ic->ic_media); 1144 } 1145 ieee80211_chan_init(ic); 1146 1147 /* 1148 * Recalculate media settings in case new channel list changes 1149 * the set of available modes. 1150 */ 1151 maxrate = ieee80211_media_setup(ic, &ic->ic_media, ic->ic_caps, 1, 1152 ieee80211com_media_change, ieee80211com_media_status); 1153 /* NB: strip explicit mode; we're actually in autoselect */ 1154 ifmedia_set(&ic->ic_media, 1155 media_status(ic->ic_opmode, ic->ic_curchan) &~ 1156 (IFM_MMASK | IFM_IEEE80211_TURBO)); 1157 if (maxrate) 1158 ifp->if_baudrate = IF_Mbps(maxrate); 1159 1160 /* XXX need to propagate new media settings to vap's */ 1161} 1162 1163/* XXX inline or eliminate? */ 1164const struct ieee80211_rateset * 1165ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c) 1166{ 1167 /* XXX does this work for 11ng basic rates? */ 1168 return &ic->ic_sup_rates[ieee80211_chan2mode(c)]; 1169} 1170 1171void 1172ieee80211_announce(struct ieee80211com *ic) 1173{ 1174 struct ifnet *ifp = ic->ic_ifp; 1175 int i, rate, mword; 1176 enum ieee80211_phymode mode; 1177 const struct ieee80211_rateset *rs; 1178 1179 /* NB: skip AUTO since it has no rates */ 1180 for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) { 1181 if (isclr(ic->ic_modecaps, mode)) 1182 continue; 1183 if_printf(ifp, "%s rates: ", ieee80211_phymode_name[mode]); 1184 rs = &ic->ic_sup_rates[mode]; 1185 for (i = 0; i < rs->rs_nrates; i++) { 1186 mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode); 1187 if (mword == 0) 1188 continue; 1189 rate = ieee80211_media2rate(mword); 1190 printf("%s%d%sMbps", (i != 0 ? " " : ""), 1191 rate / 2, ((rate & 0x1) != 0 ? ".5" : "")); 1192 } 1193 printf("\n"); 1194 } 1195 ieee80211_ht_announce(ic); 1196} 1197 1198void 1199ieee80211_announce_channels(struct ieee80211com *ic) 1200{ 1201 const struct ieee80211_channel *c; 1202 char type; 1203 int i, cw; 1204 1205 printf("Chan Freq CW RegPwr MinPwr MaxPwr\n"); 1206 for (i = 0; i < ic->ic_nchans; i++) { 1207 c = &ic->ic_channels[i]; 1208 if (IEEE80211_IS_CHAN_ST(c)) 1209 type = 'S'; 1210 else if (IEEE80211_IS_CHAN_108A(c)) 1211 type = 'T'; 1212 else if (IEEE80211_IS_CHAN_108G(c)) 1213 type = 'G'; 1214 else if (IEEE80211_IS_CHAN_HT(c)) 1215 type = 'n'; 1216 else if (IEEE80211_IS_CHAN_A(c)) 1217 type = 'a'; 1218 else if (IEEE80211_IS_CHAN_ANYG(c)) 1219 type = 'g'; 1220 else if (IEEE80211_IS_CHAN_B(c)) 1221 type = 'b'; 1222 else 1223 type = 'f'; 1224 if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c)) 1225 cw = 40; 1226 else if (IEEE80211_IS_CHAN_HALF(c)) 1227 cw = 10; 1228 else if (IEEE80211_IS_CHAN_QUARTER(c)) 1229 cw = 5; 1230 else 1231 cw = 20; 1232 printf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n" 1233 , c->ic_ieee, c->ic_freq, type 1234 , cw 1235 , IEEE80211_IS_CHAN_HT40U(c) ? '+' : 1236 IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' ' 1237 , c->ic_maxregpower 1238 , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0 1239 , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0 1240 ); 1241 } 1242} 1243 1244static int 1245media2mode(const struct ifmedia_entry *ime, uint32_t flags, uint16_t *mode) 1246{ 1247 switch (IFM_MODE(ime->ifm_media)) { 1248 case IFM_IEEE80211_11A: 1249 *mode = IEEE80211_MODE_11A; 1250 break; 1251 case IFM_IEEE80211_11B: 1252 *mode = IEEE80211_MODE_11B; 1253 break; 1254 case IFM_IEEE80211_11G: 1255 *mode = IEEE80211_MODE_11G; 1256 break; 1257 case IFM_IEEE80211_FH: 1258 *mode = IEEE80211_MODE_FH; 1259 break; 1260 case IFM_IEEE80211_11NA: 1261 *mode = IEEE80211_MODE_11NA; 1262 break; 1263 case IFM_IEEE80211_11NG: 1264 *mode = IEEE80211_MODE_11NG; 1265 break; 1266 case IFM_AUTO: 1267 *mode = IEEE80211_MODE_AUTO; 1268 break; 1269 default: 1270 return 0; 1271 } 1272 /* 1273 * Turbo mode is an ``option''. 1274 * XXX does not apply to AUTO 1275 */ 1276 if (ime->ifm_media & IFM_IEEE80211_TURBO) { 1277 if (*mode == IEEE80211_MODE_11A) { 1278 if (flags & IEEE80211_F_TURBOP) 1279 *mode = IEEE80211_MODE_TURBO_A; 1280 else 1281 *mode = IEEE80211_MODE_STURBO_A; 1282 } else if (*mode == IEEE80211_MODE_11G) 1283 *mode = IEEE80211_MODE_TURBO_G; 1284 else 1285 return 0; 1286 } 1287 /* XXX HT40 +/- */ 1288 return 1; 1289} 1290 1291/* 1292 * Handle a media change request on the underlying interface. 1293 */ 1294int 1295ieee80211com_media_change(struct ifnet *ifp) 1296{ 1297 return EINVAL; 1298} 1299 1300/* 1301 * Handle a media change request on the vap interface. 1302 */ 1303int 1304ieee80211_media_change(struct ifnet *ifp) 1305{ 1306 struct ieee80211vap *vap = ifp->if_softc; 1307 struct ifmedia_entry *ime = vap->iv_media.ifm_cur; 1308 uint16_t newmode; 1309 1310 if (!media2mode(ime, vap->iv_flags, &newmode)) 1311 return EINVAL; 1312 if (vap->iv_des_mode != newmode) { 1313 vap->iv_des_mode = newmode; 1314 /* XXX kick state machine if up+running */ 1315 } 1316 return 0; 1317} 1318 1319/* 1320 * Common code to calculate the media status word 1321 * from the operating mode and channel state. 1322 */ 1323static int 1324media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan) 1325{ 1326 int status; 1327 1328 status = IFM_IEEE80211; 1329 switch (opmode) { 1330 case IEEE80211_M_STA: 1331 break; 1332 case IEEE80211_M_IBSS: 1333 status |= IFM_IEEE80211_ADHOC; 1334 break; 1335 case IEEE80211_M_HOSTAP: 1336 status |= IFM_IEEE80211_HOSTAP; 1337 break; 1338 case IEEE80211_M_MONITOR: 1339 status |= IFM_IEEE80211_MONITOR; 1340 break; 1341 case IEEE80211_M_AHDEMO: 1342 status |= IFM_IEEE80211_ADHOC | IFM_FLAG0; 1343 break; 1344 case IEEE80211_M_WDS: 1345 status |= IFM_IEEE80211_WDS; 1346 break; 1347 case IEEE80211_M_MBSS: 1348 status |= IFM_IEEE80211_MBSS; 1349 break; 1350 } 1351 if (IEEE80211_IS_CHAN_HTA(chan)) { 1352 status |= IFM_IEEE80211_11NA; 1353 } else if (IEEE80211_IS_CHAN_HTG(chan)) { 1354 status |= IFM_IEEE80211_11NG; 1355 } else if (IEEE80211_IS_CHAN_A(chan)) { 1356 status |= IFM_IEEE80211_11A; 1357 } else if (IEEE80211_IS_CHAN_B(chan)) { 1358 status |= IFM_IEEE80211_11B; 1359 } else if (IEEE80211_IS_CHAN_ANYG(chan)) { 1360 status |= IFM_IEEE80211_11G; 1361 } else if (IEEE80211_IS_CHAN_FHSS(chan)) { 1362 status |= IFM_IEEE80211_FH; 1363 } 1364 /* XXX else complain? */ 1365 1366 if (IEEE80211_IS_CHAN_TURBO(chan)) 1367 status |= IFM_IEEE80211_TURBO; 1368#if 0 1369 if (IEEE80211_IS_CHAN_HT20(chan)) 1370 status |= IFM_IEEE80211_HT20; 1371 if (IEEE80211_IS_CHAN_HT40(chan)) 1372 status |= IFM_IEEE80211_HT40; 1373#endif 1374 return status; 1375} 1376 1377static void 1378ieee80211com_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1379{ 1380 struct ieee80211com *ic = ifp->if_l2com; 1381 struct ieee80211vap *vap; 1382 1383 imr->ifm_status = IFM_AVALID; 1384 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1385 if (vap->iv_ifp->if_flags & IFF_UP) { 1386 imr->ifm_status |= IFM_ACTIVE; 1387 break; 1388 } 1389 imr->ifm_active = media_status(ic->ic_opmode, ic->ic_curchan); 1390 if (imr->ifm_status & IFM_ACTIVE) 1391 imr->ifm_current = imr->ifm_active; 1392} 1393 1394void 1395ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1396{ 1397 struct ieee80211vap *vap = ifp->if_softc; 1398 struct ieee80211com *ic = vap->iv_ic; 1399 enum ieee80211_phymode mode; 1400 1401 imr->ifm_status = IFM_AVALID; 1402 /* 1403 * NB: use the current channel's mode to lock down a xmit 1404 * rate only when running; otherwise we may have a mismatch 1405 * in which case the rate will not be convertible. 1406 */ 1407 if (vap->iv_state == IEEE80211_S_RUN) { 1408 imr->ifm_status |= IFM_ACTIVE; 1409 mode = ieee80211_chan2mode(ic->ic_curchan); 1410 } else 1411 mode = IEEE80211_MODE_AUTO; 1412 imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan); 1413 /* 1414 * Calculate a current rate if possible. 1415 */ 1416 if (vap->iv_txparms[mode].ucastrate != IEEE80211_FIXED_RATE_NONE) { 1417 /* 1418 * A fixed rate is set, report that. 1419 */ 1420 imr->ifm_active |= ieee80211_rate2media(ic, 1421 vap->iv_txparms[mode].ucastrate, mode); 1422 } else if (vap->iv_opmode == IEEE80211_M_STA) { 1423 /* 1424 * In station mode report the current transmit rate. 1425 */ 1426 imr->ifm_active |= ieee80211_rate2media(ic, 1427 vap->iv_bss->ni_txrate, mode); 1428 } else 1429 imr->ifm_active |= IFM_AUTO; 1430 if (imr->ifm_status & IFM_ACTIVE) 1431 imr->ifm_current = imr->ifm_active; 1432} 1433 1434/* 1435 * Set the current phy mode and recalculate the active channel 1436 * set based on the available channels for this mode. Also 1437 * select a new default/current channel if the current one is 1438 * inappropriate for this mode. 1439 */ 1440int 1441ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode) 1442{ 1443 /* 1444 * Adjust basic rates in 11b/11g supported rate set. 1445 * Note that if operating on a hal/quarter rate channel 1446 * this is a noop as those rates sets are different 1447 * and used instead. 1448 */ 1449 if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B) 1450 ieee80211_setbasicrates(&ic->ic_sup_rates[mode], mode); 1451 1452 ic->ic_curmode = mode; 1453 ieee80211_reset_erp(ic); /* reset ERP state */ 1454 1455 return 0; 1456} 1457 1458/* 1459 * Return the phy mode for with the specified channel. 1460 */ 1461enum ieee80211_phymode 1462ieee80211_chan2mode(const struct ieee80211_channel *chan) 1463{ 1464 1465 if (IEEE80211_IS_CHAN_HTA(chan)) 1466 return IEEE80211_MODE_11NA; 1467 else if (IEEE80211_IS_CHAN_HTG(chan)) 1468 return IEEE80211_MODE_11NG; 1469 else if (IEEE80211_IS_CHAN_108G(chan)) 1470 return IEEE80211_MODE_TURBO_G; 1471 else if (IEEE80211_IS_CHAN_ST(chan)) 1472 return IEEE80211_MODE_STURBO_A; 1473 else if (IEEE80211_IS_CHAN_TURBO(chan)) 1474 return IEEE80211_MODE_TURBO_A; 1475 else if (IEEE80211_IS_CHAN_HALF(chan)) 1476 return IEEE80211_MODE_HALF; 1477 else if (IEEE80211_IS_CHAN_QUARTER(chan)) 1478 return IEEE80211_MODE_QUARTER; 1479 else if (IEEE80211_IS_CHAN_A(chan)) 1480 return IEEE80211_MODE_11A; 1481 else if (IEEE80211_IS_CHAN_ANYG(chan)) 1482 return IEEE80211_MODE_11G; 1483 else if (IEEE80211_IS_CHAN_B(chan)) 1484 return IEEE80211_MODE_11B; 1485 else if (IEEE80211_IS_CHAN_FHSS(chan)) 1486 return IEEE80211_MODE_FH; 1487 1488 /* NB: should not get here */ 1489 printf("%s: cannot map channel to mode; freq %u flags 0x%x\n", 1490 __func__, chan->ic_freq, chan->ic_flags); 1491 return IEEE80211_MODE_11B; 1492} 1493 1494struct ratemedia { 1495 u_int match; /* rate + mode */ 1496 u_int media; /* if_media rate */ 1497}; 1498 1499static int 1500findmedia(const struct ratemedia rates[], int n, u_int match) 1501{ 1502 int i; 1503 1504 for (i = 0; i < n; i++) 1505 if (rates[i].match == match) 1506 return rates[i].media; 1507 return IFM_AUTO; 1508} 1509 1510/* 1511 * Convert IEEE80211 rate value to ifmedia subtype. 1512 * Rate is either a legacy rate in units of 0.5Mbps 1513 * or an MCS index. 1514 */ 1515int 1516ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode) 1517{ 1518#define N(a) (sizeof(a) / sizeof(a[0])) 1519 static const struct ratemedia rates[] = { 1520 { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 }, 1521 { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 }, 1522 { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 }, 1523 { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 }, 1524 { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 }, 1525 { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 }, 1526 { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 }, 1527 { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 }, 1528 { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 }, 1529 { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 }, 1530 { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 }, 1531 { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 }, 1532 { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 }, 1533 { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 }, 1534 { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 }, 1535 { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 }, 1536 { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 }, 1537 { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 }, 1538 { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 }, 1539 { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 }, 1540 { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 }, 1541 { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 }, 1542 { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 }, 1543 { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 }, 1544 { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 }, 1545 { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 }, 1546 { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 }, 1547 { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 }, 1548 { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 }, 1549 { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 }, 1550 /* NB: OFDM72 doesn't realy exist so we don't handle it */ 1551 }; 1552 static const struct ratemedia htrates[] = { 1553 { 0, IFM_IEEE80211_MCS }, 1554 { 1, IFM_IEEE80211_MCS }, 1555 { 2, IFM_IEEE80211_MCS }, 1556 { 3, IFM_IEEE80211_MCS }, 1557 { 4, IFM_IEEE80211_MCS }, 1558 { 5, IFM_IEEE80211_MCS }, 1559 { 6, IFM_IEEE80211_MCS }, 1560 { 7, IFM_IEEE80211_MCS }, 1561 { 8, IFM_IEEE80211_MCS }, 1562 { 9, IFM_IEEE80211_MCS }, 1563 { 10, IFM_IEEE80211_MCS }, 1564 { 11, IFM_IEEE80211_MCS }, 1565 { 12, IFM_IEEE80211_MCS }, 1566 { 13, IFM_IEEE80211_MCS }, 1567 { 14, IFM_IEEE80211_MCS }, 1568 { 15, IFM_IEEE80211_MCS }, 1569 { 16, IFM_IEEE80211_MCS }, 1570 { 17, IFM_IEEE80211_MCS }, 1571 { 18, IFM_IEEE80211_MCS }, 1572 { 19, IFM_IEEE80211_MCS }, 1573 { 20, IFM_IEEE80211_MCS }, 1574 { 21, IFM_IEEE80211_MCS }, 1575 { 22, IFM_IEEE80211_MCS }, 1576 { 23, IFM_IEEE80211_MCS }, 1577 { 24, IFM_IEEE80211_MCS }, 1578 { 25, IFM_IEEE80211_MCS }, 1579 { 26, IFM_IEEE80211_MCS }, 1580 { 27, IFM_IEEE80211_MCS }, 1581 { 28, IFM_IEEE80211_MCS }, 1582 { 29, IFM_IEEE80211_MCS }, 1583 { 30, IFM_IEEE80211_MCS }, 1584 { 31, IFM_IEEE80211_MCS }, 1585 { 32, IFM_IEEE80211_MCS }, 1586 { 33, IFM_IEEE80211_MCS }, 1587 { 34, IFM_IEEE80211_MCS }, 1588 { 35, IFM_IEEE80211_MCS }, 1589 { 36, IFM_IEEE80211_MCS }, 1590 { 37, IFM_IEEE80211_MCS }, 1591 { 38, IFM_IEEE80211_MCS }, 1592 { 39, IFM_IEEE80211_MCS }, 1593 { 40, IFM_IEEE80211_MCS }, 1594 { 41, IFM_IEEE80211_MCS }, 1595 { 42, IFM_IEEE80211_MCS }, 1596 { 43, IFM_IEEE80211_MCS }, 1597 { 44, IFM_IEEE80211_MCS }, 1598 { 45, IFM_IEEE80211_MCS }, 1599 { 46, IFM_IEEE80211_MCS }, 1600 { 47, IFM_IEEE80211_MCS }, 1601 { 48, IFM_IEEE80211_MCS }, 1602 { 49, IFM_IEEE80211_MCS }, 1603 { 50, IFM_IEEE80211_MCS }, 1604 { 51, IFM_IEEE80211_MCS }, 1605 { 52, IFM_IEEE80211_MCS }, 1606 { 53, IFM_IEEE80211_MCS }, 1607 { 54, IFM_IEEE80211_MCS }, 1608 { 55, IFM_IEEE80211_MCS }, 1609 { 56, IFM_IEEE80211_MCS }, 1610 { 57, IFM_IEEE80211_MCS }, 1611 { 58, IFM_IEEE80211_MCS }, 1612 { 59, IFM_IEEE80211_MCS }, 1613 { 60, IFM_IEEE80211_MCS }, 1614 { 61, IFM_IEEE80211_MCS }, 1615 { 62, IFM_IEEE80211_MCS }, 1616 { 63, IFM_IEEE80211_MCS }, 1617 { 64, IFM_IEEE80211_MCS }, 1618 { 65, IFM_IEEE80211_MCS }, 1619 { 66, IFM_IEEE80211_MCS }, 1620 { 67, IFM_IEEE80211_MCS }, 1621 { 68, IFM_IEEE80211_MCS }, 1622 { 69, IFM_IEEE80211_MCS }, 1623 { 70, IFM_IEEE80211_MCS }, 1624 { 71, IFM_IEEE80211_MCS }, 1625 { 72, IFM_IEEE80211_MCS }, 1626 { 73, IFM_IEEE80211_MCS }, 1627 { 74, IFM_IEEE80211_MCS }, 1628 { 75, IFM_IEEE80211_MCS }, 1629 { 76, IFM_IEEE80211_MCS }, 1630 }; 1631 int m; 1632 1633 /* 1634 * Check 11n rates first for match as an MCS. 1635 */ 1636 if (mode == IEEE80211_MODE_11NA) { 1637 if (rate & IEEE80211_RATE_MCS) { 1638 rate &= ~IEEE80211_RATE_MCS; 1639 m = findmedia(htrates, N(htrates), rate); 1640 if (m != IFM_AUTO) 1641 return m | IFM_IEEE80211_11NA; 1642 } 1643 } else if (mode == IEEE80211_MODE_11NG) { 1644 /* NB: 12 is ambiguous, it will be treated as an MCS */ 1645 if (rate & IEEE80211_RATE_MCS) { 1646 rate &= ~IEEE80211_RATE_MCS; 1647 m = findmedia(htrates, N(htrates), rate); 1648 if (m != IFM_AUTO) 1649 return m | IFM_IEEE80211_11NG; 1650 } 1651 } 1652 rate &= IEEE80211_RATE_VAL; 1653 switch (mode) { 1654 case IEEE80211_MODE_11A: 1655 case IEEE80211_MODE_HALF: /* XXX good 'nuf */ 1656 case IEEE80211_MODE_QUARTER: 1657 case IEEE80211_MODE_11NA: 1658 case IEEE80211_MODE_TURBO_A: 1659 case IEEE80211_MODE_STURBO_A: 1660 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11A); 1661 case IEEE80211_MODE_11B: 1662 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11B); 1663 case IEEE80211_MODE_FH: 1664 return findmedia(rates, N(rates), rate | IFM_IEEE80211_FH); 1665 case IEEE80211_MODE_AUTO: 1666 /* NB: ic may be NULL for some drivers */ 1667 if (ic != NULL && ic->ic_phytype == IEEE80211_T_FH) 1668 return findmedia(rates, N(rates), 1669 rate | IFM_IEEE80211_FH); 1670 /* NB: hack, 11g matches both 11b+11a rates */ 1671 /* fall thru... */ 1672 case IEEE80211_MODE_11G: 1673 case IEEE80211_MODE_11NG: 1674 case IEEE80211_MODE_TURBO_G: 1675 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11G); 1676 } 1677 return IFM_AUTO; 1678#undef N 1679} 1680 1681int 1682ieee80211_media2rate(int mword) 1683{ 1684#define N(a) (sizeof(a) / sizeof(a[0])) 1685 static const int ieeerates[] = { 1686 -1, /* IFM_AUTO */ 1687 0, /* IFM_MANUAL */ 1688 0, /* IFM_NONE */ 1689 2, /* IFM_IEEE80211_FH1 */ 1690 4, /* IFM_IEEE80211_FH2 */ 1691 2, /* IFM_IEEE80211_DS1 */ 1692 4, /* IFM_IEEE80211_DS2 */ 1693 11, /* IFM_IEEE80211_DS5 */ 1694 22, /* IFM_IEEE80211_DS11 */ 1695 44, /* IFM_IEEE80211_DS22 */ 1696 12, /* IFM_IEEE80211_OFDM6 */ 1697 18, /* IFM_IEEE80211_OFDM9 */ 1698 24, /* IFM_IEEE80211_OFDM12 */ 1699 36, /* IFM_IEEE80211_OFDM18 */ 1700 48, /* IFM_IEEE80211_OFDM24 */ 1701 72, /* IFM_IEEE80211_OFDM36 */ 1702 96, /* IFM_IEEE80211_OFDM48 */ 1703 108, /* IFM_IEEE80211_OFDM54 */ 1704 144, /* IFM_IEEE80211_OFDM72 */ 1705 0, /* IFM_IEEE80211_DS354k */ 1706 0, /* IFM_IEEE80211_DS512k */ 1707 6, /* IFM_IEEE80211_OFDM3 */ 1708 9, /* IFM_IEEE80211_OFDM4 */ 1709 54, /* IFM_IEEE80211_OFDM27 */ 1710 -1, /* IFM_IEEE80211_MCS */ 1711 }; 1712 return IFM_SUBTYPE(mword) < N(ieeerates) ? 1713 ieeerates[IFM_SUBTYPE(mword)] : 0; 1714#undef N 1715} 1716 1717/* 1718 * The following hash function is adapted from "Hash Functions" by Bob Jenkins 1719 * ("Algorithm Alley", Dr. Dobbs Journal, September 1997). 1720 */ 1721#define mix(a, b, c) \ 1722do { \ 1723 a -= b; a -= c; a ^= (c >> 13); \ 1724 b -= c; b -= a; b ^= (a << 8); \ 1725 c -= a; c -= b; c ^= (b >> 13); \ 1726 a -= b; a -= c; a ^= (c >> 12); \ 1727 b -= c; b -= a; b ^= (a << 16); \ 1728 c -= a; c -= b; c ^= (b >> 5); \ 1729 a -= b; a -= c; a ^= (c >> 3); \ 1730 b -= c; b -= a; b ^= (a << 10); \ 1731 c -= a; c -= b; c ^= (b >> 15); \ 1732} while (/*CONSTCOND*/0) 1733 1734uint32_t 1735ieee80211_mac_hash(const struct ieee80211com *ic, 1736 const uint8_t addr[IEEE80211_ADDR_LEN]) 1737{ 1738 uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = ic->ic_hash_key; 1739 1740 b += addr[5] << 8; 1741 b += addr[4]; 1742 a += addr[3] << 24; 1743 a += addr[2] << 16; 1744 a += addr[1] << 8; 1745 a += addr[0]; 1746 1747 mix(a, b, c); 1748 1749 return c; 1750} 1751#undef mix 1752