ieee80211.c revision 254315
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 254315 2013-08-14 04:24:25Z rpaulo $"); 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} 243 244#if __FreeBSD_version >= 1000031 245static int 246null_output(struct ifnet *ifp, struct mbuf *m, 247 const struct sockaddr *dst, struct route *ro) 248#else 249static int 250null_output(struct ifnet *ifp, struct mbuf *m, 251 struct sockaddr *dst, struct route *ro) 252#endif 253{ 254 if_printf(ifp, "discard raw packet\n"); 255 return null_transmit(ifp, m); 256} 257 258static void 259null_input(struct ifnet *ifp, struct mbuf *m) 260{ 261 if_printf(ifp, "if_input should not be called\n"); 262 m_freem(m); 263} 264 265static void 266null_update_chw(struct ieee80211com *ic) 267{ 268 269 if_printf(ic->ic_ifp, "%s: need callback\n", __func__); 270} 271 272/* 273 * Attach/setup the common net80211 state. Called by 274 * the driver on attach to prior to creating any vap's. 275 */ 276void 277ieee80211_ifattach(struct ieee80211com *ic, 278 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 279{ 280 struct ifnet *ifp = ic->ic_ifp; 281 struct sockaddr_dl *sdl; 282 struct ifaddr *ifa; 283 284 KASSERT(ifp->if_type == IFT_IEEE80211, ("if_type %d", ifp->if_type)); 285 286 IEEE80211_LOCK_INIT(ic, ifp->if_xname); 287 IEEE80211_TX_LOCK_INIT(ic, ifp->if_xname); 288 TAILQ_INIT(&ic->ic_vaps); 289 290 /* Create a taskqueue for all state changes */ 291 ic->ic_tq = taskqueue_create("ic_taskq", M_WAITOK | M_ZERO, 292 taskqueue_thread_enqueue, &ic->ic_tq); 293 taskqueue_start_threads(&ic->ic_tq, 1, PI_NET, "%s net80211 taskq", 294 ifp->if_xname); 295 /* 296 * Fill in 802.11 available channel set, mark all 297 * available channels as active, and pick a default 298 * channel if not already specified. 299 */ 300 ieee80211_media_init(ic); 301 302 ic->ic_update_mcast = null_update_mcast; 303 ic->ic_update_promisc = null_update_promisc; 304 ic->ic_update_chw = null_update_chw; 305 306 ic->ic_hash_key = arc4random(); 307 ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT; 308 ic->ic_lintval = ic->ic_bintval; 309 ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX; 310 311 ieee80211_crypto_attach(ic); 312 ieee80211_node_attach(ic); 313 ieee80211_power_attach(ic); 314 ieee80211_proto_attach(ic); 315#ifdef IEEE80211_SUPPORT_SUPERG 316 ieee80211_superg_attach(ic); 317#endif 318 ieee80211_ht_attach(ic); 319 ieee80211_scan_attach(ic); 320 ieee80211_regdomain_attach(ic); 321 ieee80211_dfs_attach(ic); 322 323 ieee80211_sysctl_attach(ic); 324 325 ifp->if_addrlen = IEEE80211_ADDR_LEN; 326 ifp->if_hdrlen = 0; 327 328 CURVNET_SET(vnet0); 329 330 if_attach(ifp); 331 332 ifp->if_mtu = IEEE80211_MTU_MAX; 333 ifp->if_broadcastaddr = ieee80211broadcastaddr; 334 ifp->if_output = null_output; 335 ifp->if_input = null_input; /* just in case */ 336 ifp->if_resolvemulti = NULL; /* NB: callers check */ 337 338 ifa = ifaddr_byindex(ifp->if_index); 339 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); 340 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 341 sdl->sdl_type = IFT_ETHER; /* XXX IFT_IEEE80211? */ 342 sdl->sdl_alen = IEEE80211_ADDR_LEN; 343 IEEE80211_ADDR_COPY(LLADDR(sdl), macaddr); 344 ifa_free(ifa); 345 346 CURVNET_RESTORE(); 347} 348 349/* 350 * Detach net80211 state on device detach. Tear down 351 * all vap's and reclaim all common state prior to the 352 * device state going away. Note we may call back into 353 * driver; it must be prepared for this. 354 */ 355void 356ieee80211_ifdetach(struct ieee80211com *ic) 357{ 358 struct ifnet *ifp = ic->ic_ifp; 359 struct ieee80211vap *vap; 360 361 /* 362 * This detaches the main interface, but not the vaps. 363 * Each VAP may be in a separate VIMAGE. 364 */ 365 CURVNET_SET(ifp->if_vnet); 366 if_detach(ifp); 367 CURVNET_RESTORE(); 368 369 /* 370 * The VAP is responsible for setting and clearing 371 * the VIMAGE context. 372 */ 373 while ((vap = TAILQ_FIRST(&ic->ic_vaps)) != NULL) 374 ieee80211_vap_destroy(vap); 375 ieee80211_waitfor_parent(ic); 376 377 ieee80211_sysctl_detach(ic); 378 ieee80211_dfs_detach(ic); 379 ieee80211_regdomain_detach(ic); 380 ieee80211_scan_detach(ic); 381#ifdef IEEE80211_SUPPORT_SUPERG 382 ieee80211_superg_detach(ic); 383#endif 384 ieee80211_ht_detach(ic); 385 /* NB: must be called before ieee80211_node_detach */ 386 ieee80211_proto_detach(ic); 387 ieee80211_crypto_detach(ic); 388 ieee80211_power_detach(ic); 389 ieee80211_node_detach(ic); 390 391 /* XXX VNET needed? */ 392 ifmedia_removeall(&ic->ic_media); 393 394 taskqueue_free(ic->ic_tq); 395 IEEE80211_TX_LOCK_DESTROY(ic); 396 IEEE80211_LOCK_DESTROY(ic); 397} 398 399/* 400 * Default reset method for use with the ioctl support. This 401 * method is invoked after any state change in the 802.11 402 * layer that should be propagated to the hardware but not 403 * require re-initialization of the 802.11 state machine (e.g 404 * rescanning for an ap). We always return ENETRESET which 405 * should cause the driver to re-initialize the device. Drivers 406 * can override this method to implement more optimized support. 407 */ 408static int 409default_reset(struct ieee80211vap *vap, u_long cmd) 410{ 411 return ENETRESET; 412} 413 414/* 415 * Prepare a vap for use. Drivers use this call to 416 * setup net80211 state in new vap's prior attaching 417 * them with ieee80211_vap_attach (below). 418 */ 419int 420ieee80211_vap_setup(struct ieee80211com *ic, struct ieee80211vap *vap, 421 const char name[IFNAMSIZ], int unit, enum ieee80211_opmode opmode, 422 int flags, const uint8_t bssid[IEEE80211_ADDR_LEN], 423 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 424{ 425 struct ifnet *ifp; 426 427 ifp = if_alloc(IFT_ETHER); 428 if (ifp == NULL) { 429 if_printf(ic->ic_ifp, "%s: unable to allocate ifnet\n", 430 __func__); 431 return ENOMEM; 432 } 433 if_initname(ifp, name, unit); 434 ifp->if_softc = vap; /* back pointer */ 435 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 436 ifp->if_transmit = ieee80211_vap_transmit; 437 ifp->if_qflush = ieee80211_vap_qflush; 438 ifp->if_ioctl = ieee80211_ioctl; 439 ifp->if_init = ieee80211_init; 440 441 vap->iv_ifp = ifp; 442 vap->iv_ic = ic; 443 vap->iv_flags = ic->ic_flags; /* propagate common flags */ 444 vap->iv_flags_ext = ic->ic_flags_ext; 445 vap->iv_flags_ven = ic->ic_flags_ven; 446 vap->iv_caps = ic->ic_caps &~ IEEE80211_C_OPMODE; 447 vap->iv_htcaps = ic->ic_htcaps; 448 vap->iv_htextcaps = ic->ic_htextcaps; 449 vap->iv_opmode = opmode; 450 vap->iv_caps |= ieee80211_opcap[opmode]; 451 switch (opmode) { 452 case IEEE80211_M_WDS: 453 /* 454 * WDS links must specify the bssid of the far end. 455 * For legacy operation this is a static relationship. 456 * For non-legacy operation the station must associate 457 * and be authorized to pass traffic. Plumbing the 458 * vap to the proper node happens when the vap 459 * transitions to RUN state. 460 */ 461 IEEE80211_ADDR_COPY(vap->iv_des_bssid, bssid); 462 vap->iv_flags |= IEEE80211_F_DESBSSID; 463 if (flags & IEEE80211_CLONE_WDSLEGACY) 464 vap->iv_flags_ext |= IEEE80211_FEXT_WDSLEGACY; 465 break; 466#ifdef IEEE80211_SUPPORT_TDMA 467 case IEEE80211_M_AHDEMO: 468 if (flags & IEEE80211_CLONE_TDMA) { 469 /* NB: checked before clone operation allowed */ 470 KASSERT(ic->ic_caps & IEEE80211_C_TDMA, 471 ("not TDMA capable, ic_caps 0x%x", ic->ic_caps)); 472 /* 473 * Propagate TDMA capability to mark vap; this 474 * cannot be removed and is used to distinguish 475 * regular ahdemo operation from ahdemo+tdma. 476 */ 477 vap->iv_caps |= IEEE80211_C_TDMA; 478 } 479 break; 480#endif 481 default: 482 break; 483 } 484 /* auto-enable s/w beacon miss support */ 485 if (flags & IEEE80211_CLONE_NOBEACONS) 486 vap->iv_flags_ext |= IEEE80211_FEXT_SWBMISS; 487 /* auto-generated or user supplied MAC address */ 488 if (flags & (IEEE80211_CLONE_BSSID|IEEE80211_CLONE_MACADDR)) 489 vap->iv_flags_ext |= IEEE80211_FEXT_UNIQMAC; 490 /* 491 * Enable various functionality by default if we're 492 * capable; the driver can override us if it knows better. 493 */ 494 if (vap->iv_caps & IEEE80211_C_WME) 495 vap->iv_flags |= IEEE80211_F_WME; 496 if (vap->iv_caps & IEEE80211_C_BURST) 497 vap->iv_flags |= IEEE80211_F_BURST; 498 /* NB: bg scanning only makes sense for station mode right now */ 499 if (vap->iv_opmode == IEEE80211_M_STA && 500 (vap->iv_caps & IEEE80211_C_BGSCAN)) 501 vap->iv_flags |= IEEE80211_F_BGSCAN; 502 vap->iv_flags |= IEEE80211_F_DOTH; /* XXX no cap, just ena */ 503 /* NB: DFS support only makes sense for ap mode right now */ 504 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 505 (vap->iv_caps & IEEE80211_C_DFS)) 506 vap->iv_flags_ext |= IEEE80211_FEXT_DFS; 507 508 vap->iv_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */ 509 vap->iv_bmissthreshold = IEEE80211_HWBMISS_DEFAULT; 510 vap->iv_dtim_period = IEEE80211_DTIM_DEFAULT; 511 /* 512 * Install a default reset method for the ioctl support; 513 * the driver can override this. 514 */ 515 vap->iv_reset = default_reset; 516 517 IEEE80211_ADDR_COPY(vap->iv_myaddr, macaddr); 518 519 ieee80211_sysctl_vattach(vap); 520 ieee80211_crypto_vattach(vap); 521 ieee80211_node_vattach(vap); 522 ieee80211_power_vattach(vap); 523 ieee80211_proto_vattach(vap); 524#ifdef IEEE80211_SUPPORT_SUPERG 525 ieee80211_superg_vattach(vap); 526#endif 527 ieee80211_ht_vattach(vap); 528 ieee80211_scan_vattach(vap); 529 ieee80211_regdomain_vattach(vap); 530 ieee80211_radiotap_vattach(vap); 531 ieee80211_ratectl_set(vap, IEEE80211_RATECTL_NONE); 532 533 return 0; 534} 535 536/* 537 * Activate a vap. State should have been prepared with a 538 * call to ieee80211_vap_setup and by the driver. On return 539 * from this call the vap is ready for use. 540 */ 541int 542ieee80211_vap_attach(struct ieee80211vap *vap, 543 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) 544{ 545 struct ifnet *ifp = vap->iv_ifp; 546 struct ieee80211com *ic = vap->iv_ic; 547 struct ifmediareq imr; 548 int maxrate; 549 550 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 551 "%s: %s parent %s flags 0x%x flags_ext 0x%x\n", 552 __func__, ieee80211_opmode_name[vap->iv_opmode], 553 ic->ic_ifp->if_xname, vap->iv_flags, vap->iv_flags_ext); 554 555 /* 556 * Do late attach work that cannot happen until after 557 * the driver has had a chance to override defaults. 558 */ 559 ieee80211_node_latevattach(vap); 560 ieee80211_power_latevattach(vap); 561 562 maxrate = ieee80211_media_setup(ic, &vap->iv_media, vap->iv_caps, 563 vap->iv_opmode == IEEE80211_M_STA, media_change, media_stat); 564 ieee80211_media_status(ifp, &imr); 565 /* NB: strip explicit mode; we're actually in autoselect */ 566 ifmedia_set(&vap->iv_media, 567 imr.ifm_active &~ (IFM_MMASK | IFM_IEEE80211_TURBO)); 568 if (maxrate) 569 ifp->if_baudrate = IF_Mbps(maxrate); 570 571 ether_ifattach(ifp, vap->iv_myaddr); 572 if (vap->iv_opmode == IEEE80211_M_MONITOR) { 573 /* NB: disallow transmit */ 574 ifp->if_transmit = null_transmit; 575 ifp->if_output = null_output; 576 } else { 577 /* hook output method setup by ether_ifattach */ 578 vap->iv_output = ifp->if_output; 579 ifp->if_output = ieee80211_output; 580 } 581 /* NB: if_mtu set by ether_ifattach to ETHERMTU */ 582 583 IEEE80211_LOCK(ic); 584 TAILQ_INSERT_TAIL(&ic->ic_vaps, vap, iv_next); 585 ieee80211_syncflag_locked(ic, IEEE80211_F_WME); 586#ifdef IEEE80211_SUPPORT_SUPERG 587 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); 588#endif 589 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); 590 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); 591 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT); 592 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40); 593 ieee80211_syncifflag_locked(ic, IFF_PROMISC); 594 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI); 595 IEEE80211_UNLOCK(ic); 596 597 return 1; 598} 599 600/* 601 * Tear down vap state and reclaim the ifnet. 602 * The driver is assumed to have prepared for 603 * this; e.g. by turning off interrupts for the 604 * underlying device. 605 */ 606void 607ieee80211_vap_detach(struct ieee80211vap *vap) 608{ 609 struct ieee80211com *ic = vap->iv_ic; 610 struct ifnet *ifp = vap->iv_ifp; 611 612 CURVNET_SET(ifp->if_vnet); 613 614 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s parent %s\n", 615 __func__, ieee80211_opmode_name[vap->iv_opmode], 616 ic->ic_ifp->if_xname); 617 618 /* NB: bpfdetach is called by ether_ifdetach and claims all taps */ 619 ether_ifdetach(ifp); 620 621 ieee80211_stop(vap); 622 623 /* 624 * Flush any deferred vap tasks. 625 */ 626 ieee80211_draintask(ic, &vap->iv_nstate_task); 627 ieee80211_draintask(ic, &vap->iv_swbmiss_task); 628 629 /* XXX band-aid until ifnet handles this for us */ 630 taskqueue_drain(taskqueue_swi, &ifp->if_linktask); 631 632 IEEE80211_LOCK(ic); 633 KASSERT(vap->iv_state == IEEE80211_S_INIT , ("vap still running")); 634 TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next); 635 ieee80211_syncflag_locked(ic, IEEE80211_F_WME); 636#ifdef IEEE80211_SUPPORT_SUPERG 637 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); 638#endif 639 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); 640 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); 641 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT); 642 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40); 643 /* NB: this handles the bpfdetach done below */ 644 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_BPF); 645 ieee80211_syncifflag_locked(ic, IFF_PROMISC); 646 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI); 647 IEEE80211_UNLOCK(ic); 648 649 ifmedia_removeall(&vap->iv_media); 650 651 ieee80211_radiotap_vdetach(vap); 652 ieee80211_regdomain_vdetach(vap); 653 ieee80211_scan_vdetach(vap); 654#ifdef IEEE80211_SUPPORT_SUPERG 655 ieee80211_superg_vdetach(vap); 656#endif 657 ieee80211_ht_vdetach(vap); 658 /* NB: must be before ieee80211_node_vdetach */ 659 ieee80211_proto_vdetach(vap); 660 ieee80211_crypto_vdetach(vap); 661 ieee80211_power_vdetach(vap); 662 ieee80211_node_vdetach(vap); 663 ieee80211_sysctl_vdetach(vap); 664 665 if_free(ifp); 666 667 CURVNET_RESTORE(); 668} 669 670/* 671 * Synchronize flag bit state in the parent ifnet structure 672 * according to the state of all vap ifnet's. This is used, 673 * for example, to handle IFF_PROMISC and IFF_ALLMULTI. 674 */ 675void 676ieee80211_syncifflag_locked(struct ieee80211com *ic, int flag) 677{ 678 struct ifnet *ifp = ic->ic_ifp; 679 struct ieee80211vap *vap; 680 int bit, oflags; 681 682 IEEE80211_LOCK_ASSERT(ic); 683 684 bit = 0; 685 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 686 if (vap->iv_ifp->if_flags & flag) { 687 /* 688 * XXX the bridge sets PROMISC but we don't want to 689 * enable it on the device, discard here so all the 690 * drivers don't need to special-case it 691 */ 692 if (flag == IFF_PROMISC && 693 !(vap->iv_opmode == IEEE80211_M_MONITOR || 694 (vap->iv_opmode == IEEE80211_M_AHDEMO && 695 (vap->iv_caps & IEEE80211_C_TDMA) == 0))) 696 continue; 697 bit = 1; 698 break; 699 } 700 oflags = ifp->if_flags; 701 if (bit) 702 ifp->if_flags |= flag; 703 else 704 ifp->if_flags &= ~flag; 705 if ((ifp->if_flags ^ oflags) & flag) { 706 /* XXX should we return 1/0 and let caller do this? */ 707 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 708 if (flag == IFF_PROMISC) 709 ieee80211_runtask(ic, &ic->ic_promisc_task); 710 else if (flag == IFF_ALLMULTI) 711 ieee80211_runtask(ic, &ic->ic_mcast_task); 712 } 713 } 714} 715 716/* 717 * Synchronize flag bit state in the com structure 718 * according to the state of all vap's. This is used, 719 * for example, to handle state changes via ioctls. 720 */ 721static void 722ieee80211_syncflag_locked(struct ieee80211com *ic, int flag) 723{ 724 struct ieee80211vap *vap; 725 int bit; 726 727 IEEE80211_LOCK_ASSERT(ic); 728 729 bit = 0; 730 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 731 if (vap->iv_flags & flag) { 732 bit = 1; 733 break; 734 } 735 if (bit) 736 ic->ic_flags |= flag; 737 else 738 ic->ic_flags &= ~flag; 739} 740 741void 742ieee80211_syncflag(struct ieee80211vap *vap, int flag) 743{ 744 struct ieee80211com *ic = vap->iv_ic; 745 746 IEEE80211_LOCK(ic); 747 if (flag < 0) { 748 flag = -flag; 749 vap->iv_flags &= ~flag; 750 } else 751 vap->iv_flags |= flag; 752 ieee80211_syncflag_locked(ic, flag); 753 IEEE80211_UNLOCK(ic); 754} 755 756/* 757 * Synchronize flags_ht bit state in the com structure 758 * according to the state of all vap's. This is used, 759 * for example, to handle state changes via ioctls. 760 */ 761static void 762ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag) 763{ 764 struct ieee80211vap *vap; 765 int bit; 766 767 IEEE80211_LOCK_ASSERT(ic); 768 769 bit = 0; 770 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 771 if (vap->iv_flags_ht & flag) { 772 bit = 1; 773 break; 774 } 775 if (bit) 776 ic->ic_flags_ht |= flag; 777 else 778 ic->ic_flags_ht &= ~flag; 779} 780 781void 782ieee80211_syncflag_ht(struct ieee80211vap *vap, int flag) 783{ 784 struct ieee80211com *ic = vap->iv_ic; 785 786 IEEE80211_LOCK(ic); 787 if (flag < 0) { 788 flag = -flag; 789 vap->iv_flags_ht &= ~flag; 790 } else 791 vap->iv_flags_ht |= flag; 792 ieee80211_syncflag_ht_locked(ic, flag); 793 IEEE80211_UNLOCK(ic); 794} 795 796/* 797 * Synchronize flags_ext bit state in the com structure 798 * according to the state of all vap's. This is used, 799 * for example, to handle state changes via ioctls. 800 */ 801static void 802ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag) 803{ 804 struct ieee80211vap *vap; 805 int bit; 806 807 IEEE80211_LOCK_ASSERT(ic); 808 809 bit = 0; 810 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 811 if (vap->iv_flags_ext & flag) { 812 bit = 1; 813 break; 814 } 815 if (bit) 816 ic->ic_flags_ext |= flag; 817 else 818 ic->ic_flags_ext &= ~flag; 819} 820 821void 822ieee80211_syncflag_ext(struct ieee80211vap *vap, int flag) 823{ 824 struct ieee80211com *ic = vap->iv_ic; 825 826 IEEE80211_LOCK(ic); 827 if (flag < 0) { 828 flag = -flag; 829 vap->iv_flags_ext &= ~flag; 830 } else 831 vap->iv_flags_ext |= flag; 832 ieee80211_syncflag_ext_locked(ic, flag); 833 IEEE80211_UNLOCK(ic); 834} 835 836static __inline int 837mapgsm(u_int freq, u_int flags) 838{ 839 freq *= 10; 840 if (flags & IEEE80211_CHAN_QUARTER) 841 freq += 5; 842 else if (flags & IEEE80211_CHAN_HALF) 843 freq += 10; 844 else 845 freq += 20; 846 /* NB: there is no 907/20 wide but leave room */ 847 return (freq - 906*10) / 5; 848} 849 850static __inline int 851mappsb(u_int freq, u_int flags) 852{ 853 return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5; 854} 855 856/* 857 * Convert MHz frequency to IEEE channel number. 858 */ 859int 860ieee80211_mhz2ieee(u_int freq, u_int flags) 861{ 862#define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990) 863 if (flags & IEEE80211_CHAN_GSM) 864 return mapgsm(freq, flags); 865 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 866 if (freq == 2484) 867 return 14; 868 if (freq < 2484) 869 return ((int) freq - 2407) / 5; 870 else 871 return 15 + ((freq - 2512) / 20); 872 } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */ 873 if (freq <= 5000) { 874 /* XXX check regdomain? */ 875 if (IS_FREQ_IN_PSB(freq)) 876 return mappsb(freq, flags); 877 return (freq - 4000) / 5; 878 } else 879 return (freq - 5000) / 5; 880 } else { /* either, guess */ 881 if (freq == 2484) 882 return 14; 883 if (freq < 2484) { 884 if (907 <= freq && freq <= 922) 885 return mapgsm(freq, flags); 886 return ((int) freq - 2407) / 5; 887 } 888 if (freq < 5000) { 889 if (IS_FREQ_IN_PSB(freq)) 890 return mappsb(freq, flags); 891 else if (freq > 4900) 892 return (freq - 4000) / 5; 893 else 894 return 15 + ((freq - 2512) / 20); 895 } 896 return (freq - 5000) / 5; 897 } 898#undef IS_FREQ_IN_PSB 899} 900 901/* 902 * Convert channel to IEEE channel number. 903 */ 904int 905ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c) 906{ 907 if (c == NULL) { 908 if_printf(ic->ic_ifp, "invalid channel (NULL)\n"); 909 return 0; /* XXX */ 910 } 911 return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee); 912} 913 914/* 915 * Convert IEEE channel number to MHz frequency. 916 */ 917u_int 918ieee80211_ieee2mhz(u_int chan, u_int flags) 919{ 920 if (flags & IEEE80211_CHAN_GSM) 921 return 907 + 5 * (chan / 10); 922 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 923 if (chan == 14) 924 return 2484; 925 if (chan < 14) 926 return 2407 + chan*5; 927 else 928 return 2512 + ((chan-15)*20); 929 } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */ 930 if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) { 931 chan -= 37; 932 return 4940 + chan*5 + (chan % 5 ? 2 : 0); 933 } 934 return 5000 + (chan*5); 935 } else { /* either, guess */ 936 /* XXX can't distinguish PSB+GSM channels */ 937 if (chan == 14) 938 return 2484; 939 if (chan < 14) /* 0-13 */ 940 return 2407 + chan*5; 941 if (chan < 27) /* 15-26 */ 942 return 2512 + ((chan-15)*20); 943 return 5000 + (chan*5); 944 } 945} 946 947/* 948 * Locate a channel given a frequency+flags. We cache 949 * the previous lookup to optimize switching between two 950 * channels--as happens with dynamic turbo. 951 */ 952struct ieee80211_channel * 953ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags) 954{ 955 struct ieee80211_channel *c; 956 int i; 957 958 flags &= IEEE80211_CHAN_ALLTURBO; 959 c = ic->ic_prevchan; 960 if (c != NULL && c->ic_freq == freq && 961 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 962 return c; 963 /* brute force search */ 964 for (i = 0; i < ic->ic_nchans; i++) { 965 c = &ic->ic_channels[i]; 966 if (c->ic_freq == freq && 967 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 968 return c; 969 } 970 return NULL; 971} 972 973/* 974 * Locate a channel given a channel number+flags. We cache 975 * the previous lookup to optimize switching between two 976 * channels--as happens with dynamic turbo. 977 */ 978struct ieee80211_channel * 979ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags) 980{ 981 struct ieee80211_channel *c; 982 int i; 983 984 flags &= IEEE80211_CHAN_ALLTURBO; 985 c = ic->ic_prevchan; 986 if (c != NULL && c->ic_ieee == ieee && 987 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 988 return c; 989 /* brute force search */ 990 for (i = 0; i < ic->ic_nchans; i++) { 991 c = &ic->ic_channels[i]; 992 if (c->ic_ieee == ieee && 993 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 994 return c; 995 } 996 return NULL; 997} 998 999static void 1000addmedia(struct ifmedia *media, int caps, int addsta, int mode, int mword) 1001{ 1002#define ADD(_ic, _s, _o) \ 1003 ifmedia_add(media, \ 1004 IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL) 1005 static const u_int mopts[IEEE80211_MODE_MAX] = { 1006 [IEEE80211_MODE_AUTO] = IFM_AUTO, 1007 [IEEE80211_MODE_11A] = IFM_IEEE80211_11A, 1008 [IEEE80211_MODE_11B] = IFM_IEEE80211_11B, 1009 [IEEE80211_MODE_11G] = IFM_IEEE80211_11G, 1010 [IEEE80211_MODE_FH] = IFM_IEEE80211_FH, 1011 [IEEE80211_MODE_TURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO, 1012 [IEEE80211_MODE_TURBO_G] = IFM_IEEE80211_11G|IFM_IEEE80211_TURBO, 1013 [IEEE80211_MODE_STURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO, 1014 [IEEE80211_MODE_HALF] = IFM_IEEE80211_11A, /* XXX */ 1015 [IEEE80211_MODE_QUARTER] = IFM_IEEE80211_11A, /* XXX */ 1016 [IEEE80211_MODE_11NA] = IFM_IEEE80211_11NA, 1017 [IEEE80211_MODE_11NG] = IFM_IEEE80211_11NG, 1018 }; 1019 u_int mopt; 1020 1021 mopt = mopts[mode]; 1022 if (addsta) 1023 ADD(ic, mword, mopt); /* STA mode has no cap */ 1024 if (caps & IEEE80211_C_IBSS) 1025 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC); 1026 if (caps & IEEE80211_C_HOSTAP) 1027 ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP); 1028 if (caps & IEEE80211_C_AHDEMO) 1029 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0); 1030 if (caps & IEEE80211_C_MONITOR) 1031 ADD(media, mword, mopt | IFM_IEEE80211_MONITOR); 1032 if (caps & IEEE80211_C_WDS) 1033 ADD(media, mword, mopt | IFM_IEEE80211_WDS); 1034 if (caps & IEEE80211_C_MBSS) 1035 ADD(media, mword, mopt | IFM_IEEE80211_MBSS); 1036#undef ADD 1037} 1038 1039/* 1040 * Setup the media data structures according to the channel and 1041 * rate tables. 1042 */ 1043static int 1044ieee80211_media_setup(struct ieee80211com *ic, 1045 struct ifmedia *media, int caps, int addsta, 1046 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) 1047{ 1048 int i, j, rate, maxrate, mword, r; 1049 enum ieee80211_phymode mode; 1050 const struct ieee80211_rateset *rs; 1051 struct ieee80211_rateset allrates; 1052 1053 /* 1054 * Fill in media characteristics. 1055 */ 1056 ifmedia_init(media, 0, media_change, media_stat); 1057 maxrate = 0; 1058 /* 1059 * Add media for legacy operating modes. 1060 */ 1061 memset(&allrates, 0, sizeof(allrates)); 1062 for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) { 1063 if (isclr(ic->ic_modecaps, mode)) 1064 continue; 1065 addmedia(media, caps, addsta, mode, IFM_AUTO); 1066 if (mode == IEEE80211_MODE_AUTO) 1067 continue; 1068 rs = &ic->ic_sup_rates[mode]; 1069 for (i = 0; i < rs->rs_nrates; i++) { 1070 rate = rs->rs_rates[i]; 1071 mword = ieee80211_rate2media(ic, rate, mode); 1072 if (mword == 0) 1073 continue; 1074 addmedia(media, caps, addsta, mode, mword); 1075 /* 1076 * Add legacy rate to the collection of all rates. 1077 */ 1078 r = rate & IEEE80211_RATE_VAL; 1079 for (j = 0; j < allrates.rs_nrates; j++) 1080 if (allrates.rs_rates[j] == r) 1081 break; 1082 if (j == allrates.rs_nrates) { 1083 /* unique, add to the set */ 1084 allrates.rs_rates[j] = r; 1085 allrates.rs_nrates++; 1086 } 1087 rate = (rate & IEEE80211_RATE_VAL) / 2; 1088 if (rate > maxrate) 1089 maxrate = rate; 1090 } 1091 } 1092 for (i = 0; i < allrates.rs_nrates; i++) { 1093 mword = ieee80211_rate2media(ic, allrates.rs_rates[i], 1094 IEEE80211_MODE_AUTO); 1095 if (mword == 0) 1096 continue; 1097 /* NB: remove media options from mword */ 1098 addmedia(media, caps, addsta, 1099 IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword)); 1100 } 1101 /* 1102 * Add HT/11n media. Note that we do not have enough 1103 * bits in the media subtype to express the MCS so we 1104 * use a "placeholder" media subtype and any fixed MCS 1105 * must be specified with a different mechanism. 1106 */ 1107 for (; mode <= IEEE80211_MODE_11NG; mode++) { 1108 if (isclr(ic->ic_modecaps, mode)) 1109 continue; 1110 addmedia(media, caps, addsta, mode, IFM_AUTO); 1111 addmedia(media, caps, addsta, mode, IFM_IEEE80211_MCS); 1112 } 1113 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) || 1114 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) { 1115 addmedia(media, caps, addsta, 1116 IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS); 1117 i = ic->ic_txstream * 8 - 1; 1118 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) && 1119 (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI40)) 1120 rate = ieee80211_htrates[i].ht40_rate_400ns; 1121 else if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40)) 1122 rate = ieee80211_htrates[i].ht40_rate_800ns; 1123 else if ((ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI20)) 1124 rate = ieee80211_htrates[i].ht20_rate_400ns; 1125 else 1126 rate = ieee80211_htrates[i].ht20_rate_800ns; 1127 if (rate > maxrate) 1128 maxrate = rate; 1129 } 1130 return maxrate; 1131} 1132 1133void 1134ieee80211_media_init(struct ieee80211com *ic) 1135{ 1136 struct ifnet *ifp = ic->ic_ifp; 1137 int maxrate; 1138 1139 /* NB: this works because the structure is initialized to zero */ 1140 if (!LIST_EMPTY(&ic->ic_media.ifm_list)) { 1141 /* 1142 * We are re-initializing the channel list; clear 1143 * the existing media state as the media routines 1144 * don't suppress duplicates. 1145 */ 1146 ifmedia_removeall(&ic->ic_media); 1147 } 1148 ieee80211_chan_init(ic); 1149 1150 /* 1151 * Recalculate media settings in case new channel list changes 1152 * the set of available modes. 1153 */ 1154 maxrate = ieee80211_media_setup(ic, &ic->ic_media, ic->ic_caps, 1, 1155 ieee80211com_media_change, ieee80211com_media_status); 1156 /* NB: strip explicit mode; we're actually in autoselect */ 1157 ifmedia_set(&ic->ic_media, 1158 media_status(ic->ic_opmode, ic->ic_curchan) &~ 1159 (IFM_MMASK | IFM_IEEE80211_TURBO)); 1160 if (maxrate) 1161 ifp->if_baudrate = IF_Mbps(maxrate); 1162 1163 /* XXX need to propagate new media settings to vap's */ 1164} 1165 1166/* XXX inline or eliminate? */ 1167const struct ieee80211_rateset * 1168ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c) 1169{ 1170 /* XXX does this work for 11ng basic rates? */ 1171 return &ic->ic_sup_rates[ieee80211_chan2mode(c)]; 1172} 1173 1174void 1175ieee80211_announce(struct ieee80211com *ic) 1176{ 1177 struct ifnet *ifp = ic->ic_ifp; 1178 int i, rate, mword; 1179 enum ieee80211_phymode mode; 1180 const struct ieee80211_rateset *rs; 1181 1182 /* NB: skip AUTO since it has no rates */ 1183 for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) { 1184 if (isclr(ic->ic_modecaps, mode)) 1185 continue; 1186 if_printf(ifp, "%s rates: ", ieee80211_phymode_name[mode]); 1187 rs = &ic->ic_sup_rates[mode]; 1188 for (i = 0; i < rs->rs_nrates; i++) { 1189 mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode); 1190 if (mword == 0) 1191 continue; 1192 rate = ieee80211_media2rate(mword); 1193 printf("%s%d%sMbps", (i != 0 ? " " : ""), 1194 rate / 2, ((rate & 0x1) != 0 ? ".5" : "")); 1195 } 1196 printf("\n"); 1197 } 1198 ieee80211_ht_announce(ic); 1199} 1200 1201void 1202ieee80211_announce_channels(struct ieee80211com *ic) 1203{ 1204 const struct ieee80211_channel *c; 1205 char type; 1206 int i, cw; 1207 1208 printf("Chan Freq CW RegPwr MinPwr MaxPwr\n"); 1209 for (i = 0; i < ic->ic_nchans; i++) { 1210 c = &ic->ic_channels[i]; 1211 if (IEEE80211_IS_CHAN_ST(c)) 1212 type = 'S'; 1213 else if (IEEE80211_IS_CHAN_108A(c)) 1214 type = 'T'; 1215 else if (IEEE80211_IS_CHAN_108G(c)) 1216 type = 'G'; 1217 else if (IEEE80211_IS_CHAN_HT(c)) 1218 type = 'n'; 1219 else if (IEEE80211_IS_CHAN_A(c)) 1220 type = 'a'; 1221 else if (IEEE80211_IS_CHAN_ANYG(c)) 1222 type = 'g'; 1223 else if (IEEE80211_IS_CHAN_B(c)) 1224 type = 'b'; 1225 else 1226 type = 'f'; 1227 if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c)) 1228 cw = 40; 1229 else if (IEEE80211_IS_CHAN_HALF(c)) 1230 cw = 10; 1231 else if (IEEE80211_IS_CHAN_QUARTER(c)) 1232 cw = 5; 1233 else 1234 cw = 20; 1235 printf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n" 1236 , c->ic_ieee, c->ic_freq, type 1237 , cw 1238 , IEEE80211_IS_CHAN_HT40U(c) ? '+' : 1239 IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' ' 1240 , c->ic_maxregpower 1241 , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0 1242 , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0 1243 ); 1244 } 1245} 1246 1247static int 1248media2mode(const struct ifmedia_entry *ime, uint32_t flags, uint16_t *mode) 1249{ 1250 switch (IFM_MODE(ime->ifm_media)) { 1251 case IFM_IEEE80211_11A: 1252 *mode = IEEE80211_MODE_11A; 1253 break; 1254 case IFM_IEEE80211_11B: 1255 *mode = IEEE80211_MODE_11B; 1256 break; 1257 case IFM_IEEE80211_11G: 1258 *mode = IEEE80211_MODE_11G; 1259 break; 1260 case IFM_IEEE80211_FH: 1261 *mode = IEEE80211_MODE_FH; 1262 break; 1263 case IFM_IEEE80211_11NA: 1264 *mode = IEEE80211_MODE_11NA; 1265 break; 1266 case IFM_IEEE80211_11NG: 1267 *mode = IEEE80211_MODE_11NG; 1268 break; 1269 case IFM_AUTO: 1270 *mode = IEEE80211_MODE_AUTO; 1271 break; 1272 default: 1273 return 0; 1274 } 1275 /* 1276 * Turbo mode is an ``option''. 1277 * XXX does not apply to AUTO 1278 */ 1279 if (ime->ifm_media & IFM_IEEE80211_TURBO) { 1280 if (*mode == IEEE80211_MODE_11A) { 1281 if (flags & IEEE80211_F_TURBOP) 1282 *mode = IEEE80211_MODE_TURBO_A; 1283 else 1284 *mode = IEEE80211_MODE_STURBO_A; 1285 } else if (*mode == IEEE80211_MODE_11G) 1286 *mode = IEEE80211_MODE_TURBO_G; 1287 else 1288 return 0; 1289 } 1290 /* XXX HT40 +/- */ 1291 return 1; 1292} 1293 1294/* 1295 * Handle a media change request on the underlying interface. 1296 */ 1297int 1298ieee80211com_media_change(struct ifnet *ifp) 1299{ 1300 return EINVAL; 1301} 1302 1303/* 1304 * Handle a media change request on the vap interface. 1305 */ 1306int 1307ieee80211_media_change(struct ifnet *ifp) 1308{ 1309 struct ieee80211vap *vap = ifp->if_softc; 1310 struct ifmedia_entry *ime = vap->iv_media.ifm_cur; 1311 uint16_t newmode; 1312 1313 if (!media2mode(ime, vap->iv_flags, &newmode)) 1314 return EINVAL; 1315 if (vap->iv_des_mode != newmode) { 1316 vap->iv_des_mode = newmode; 1317 /* XXX kick state machine if up+running */ 1318 } 1319 return 0; 1320} 1321 1322/* 1323 * Common code to calculate the media status word 1324 * from the operating mode and channel state. 1325 */ 1326static int 1327media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan) 1328{ 1329 int status; 1330 1331 status = IFM_IEEE80211; 1332 switch (opmode) { 1333 case IEEE80211_M_STA: 1334 break; 1335 case IEEE80211_M_IBSS: 1336 status |= IFM_IEEE80211_ADHOC; 1337 break; 1338 case IEEE80211_M_HOSTAP: 1339 status |= IFM_IEEE80211_HOSTAP; 1340 break; 1341 case IEEE80211_M_MONITOR: 1342 status |= IFM_IEEE80211_MONITOR; 1343 break; 1344 case IEEE80211_M_AHDEMO: 1345 status |= IFM_IEEE80211_ADHOC | IFM_FLAG0; 1346 break; 1347 case IEEE80211_M_WDS: 1348 status |= IFM_IEEE80211_WDS; 1349 break; 1350 case IEEE80211_M_MBSS: 1351 status |= IFM_IEEE80211_MBSS; 1352 break; 1353 } 1354 if (IEEE80211_IS_CHAN_HTA(chan)) { 1355 status |= IFM_IEEE80211_11NA; 1356 } else if (IEEE80211_IS_CHAN_HTG(chan)) { 1357 status |= IFM_IEEE80211_11NG; 1358 } else if (IEEE80211_IS_CHAN_A(chan)) { 1359 status |= IFM_IEEE80211_11A; 1360 } else if (IEEE80211_IS_CHAN_B(chan)) { 1361 status |= IFM_IEEE80211_11B; 1362 } else if (IEEE80211_IS_CHAN_ANYG(chan)) { 1363 status |= IFM_IEEE80211_11G; 1364 } else if (IEEE80211_IS_CHAN_FHSS(chan)) { 1365 status |= IFM_IEEE80211_FH; 1366 } 1367 /* XXX else complain? */ 1368 1369 if (IEEE80211_IS_CHAN_TURBO(chan)) 1370 status |= IFM_IEEE80211_TURBO; 1371#if 0 1372 if (IEEE80211_IS_CHAN_HT20(chan)) 1373 status |= IFM_IEEE80211_HT20; 1374 if (IEEE80211_IS_CHAN_HT40(chan)) 1375 status |= IFM_IEEE80211_HT40; 1376#endif 1377 return status; 1378} 1379 1380static void 1381ieee80211com_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1382{ 1383 struct ieee80211com *ic = ifp->if_l2com; 1384 struct ieee80211vap *vap; 1385 1386 imr->ifm_status = IFM_AVALID; 1387 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1388 if (vap->iv_ifp->if_flags & IFF_UP) { 1389 imr->ifm_status |= IFM_ACTIVE; 1390 break; 1391 } 1392 imr->ifm_active = media_status(ic->ic_opmode, ic->ic_curchan); 1393 if (imr->ifm_status & IFM_ACTIVE) 1394 imr->ifm_current = imr->ifm_active; 1395} 1396 1397void 1398ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1399{ 1400 struct ieee80211vap *vap = ifp->if_softc; 1401 struct ieee80211com *ic = vap->iv_ic; 1402 enum ieee80211_phymode mode; 1403 1404 imr->ifm_status = IFM_AVALID; 1405 /* 1406 * NB: use the current channel's mode to lock down a xmit 1407 * rate only when running; otherwise we may have a mismatch 1408 * in which case the rate will not be convertible. 1409 */ 1410 if (vap->iv_state == IEEE80211_S_RUN) { 1411 imr->ifm_status |= IFM_ACTIVE; 1412 mode = ieee80211_chan2mode(ic->ic_curchan); 1413 } else 1414 mode = IEEE80211_MODE_AUTO; 1415 imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan); 1416 /* 1417 * Calculate a current rate if possible. 1418 */ 1419 if (vap->iv_txparms[mode].ucastrate != IEEE80211_FIXED_RATE_NONE) { 1420 /* 1421 * A fixed rate is set, report that. 1422 */ 1423 imr->ifm_active |= ieee80211_rate2media(ic, 1424 vap->iv_txparms[mode].ucastrate, mode); 1425 } else if (vap->iv_opmode == IEEE80211_M_STA) { 1426 /* 1427 * In station mode report the current transmit rate. 1428 */ 1429 imr->ifm_active |= ieee80211_rate2media(ic, 1430 vap->iv_bss->ni_txrate, mode); 1431 } else 1432 imr->ifm_active |= IFM_AUTO; 1433 if (imr->ifm_status & IFM_ACTIVE) 1434 imr->ifm_current = imr->ifm_active; 1435} 1436 1437/* 1438 * Set the current phy mode and recalculate the active channel 1439 * set based on the available channels for this mode. Also 1440 * select a new default/current channel if the current one is 1441 * inappropriate for this mode. 1442 */ 1443int 1444ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode) 1445{ 1446 /* 1447 * Adjust basic rates in 11b/11g supported rate set. 1448 * Note that if operating on a hal/quarter rate channel 1449 * this is a noop as those rates sets are different 1450 * and used instead. 1451 */ 1452 if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B) 1453 ieee80211_setbasicrates(&ic->ic_sup_rates[mode], mode); 1454 1455 ic->ic_curmode = mode; 1456 ieee80211_reset_erp(ic); /* reset ERP state */ 1457 1458 return 0; 1459} 1460 1461/* 1462 * Return the phy mode for with the specified channel. 1463 */ 1464enum ieee80211_phymode 1465ieee80211_chan2mode(const struct ieee80211_channel *chan) 1466{ 1467 1468 if (IEEE80211_IS_CHAN_HTA(chan)) 1469 return IEEE80211_MODE_11NA; 1470 else if (IEEE80211_IS_CHAN_HTG(chan)) 1471 return IEEE80211_MODE_11NG; 1472 else if (IEEE80211_IS_CHAN_108G(chan)) 1473 return IEEE80211_MODE_TURBO_G; 1474 else if (IEEE80211_IS_CHAN_ST(chan)) 1475 return IEEE80211_MODE_STURBO_A; 1476 else if (IEEE80211_IS_CHAN_TURBO(chan)) 1477 return IEEE80211_MODE_TURBO_A; 1478 else if (IEEE80211_IS_CHAN_HALF(chan)) 1479 return IEEE80211_MODE_HALF; 1480 else if (IEEE80211_IS_CHAN_QUARTER(chan)) 1481 return IEEE80211_MODE_QUARTER; 1482 else if (IEEE80211_IS_CHAN_A(chan)) 1483 return IEEE80211_MODE_11A; 1484 else if (IEEE80211_IS_CHAN_ANYG(chan)) 1485 return IEEE80211_MODE_11G; 1486 else if (IEEE80211_IS_CHAN_B(chan)) 1487 return IEEE80211_MODE_11B; 1488 else if (IEEE80211_IS_CHAN_FHSS(chan)) 1489 return IEEE80211_MODE_FH; 1490 1491 /* NB: should not get here */ 1492 printf("%s: cannot map channel to mode; freq %u flags 0x%x\n", 1493 __func__, chan->ic_freq, chan->ic_flags); 1494 return IEEE80211_MODE_11B; 1495} 1496 1497struct ratemedia { 1498 u_int match; /* rate + mode */ 1499 u_int media; /* if_media rate */ 1500}; 1501 1502static int 1503findmedia(const struct ratemedia rates[], int n, u_int match) 1504{ 1505 int i; 1506 1507 for (i = 0; i < n; i++) 1508 if (rates[i].match == match) 1509 return rates[i].media; 1510 return IFM_AUTO; 1511} 1512 1513/* 1514 * Convert IEEE80211 rate value to ifmedia subtype. 1515 * Rate is either a legacy rate in units of 0.5Mbps 1516 * or an MCS index. 1517 */ 1518int 1519ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode) 1520{ 1521 static const struct ratemedia rates[] = { 1522 { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 }, 1523 { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 }, 1524 { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 }, 1525 { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 }, 1526 { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 }, 1527 { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 }, 1528 { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 }, 1529 { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 }, 1530 { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 }, 1531 { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 }, 1532 { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 }, 1533 { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 }, 1534 { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 }, 1535 { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 }, 1536 { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 }, 1537 { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 }, 1538 { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 }, 1539 { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 }, 1540 { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 }, 1541 { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 }, 1542 { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 }, 1543 { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 }, 1544 { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 }, 1545 { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 }, 1546 { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 }, 1547 { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 }, 1548 { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 }, 1549 { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 }, 1550 { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 }, 1551 { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 }, 1552 /* NB: OFDM72 doesn't realy exist so we don't handle it */ 1553 }; 1554 static const struct ratemedia htrates[] = { 1555 { 0, IFM_IEEE80211_MCS }, 1556 { 1, IFM_IEEE80211_MCS }, 1557 { 2, IFM_IEEE80211_MCS }, 1558 { 3, IFM_IEEE80211_MCS }, 1559 { 4, IFM_IEEE80211_MCS }, 1560 { 5, IFM_IEEE80211_MCS }, 1561 { 6, IFM_IEEE80211_MCS }, 1562 { 7, IFM_IEEE80211_MCS }, 1563 { 8, IFM_IEEE80211_MCS }, 1564 { 9, IFM_IEEE80211_MCS }, 1565 { 10, IFM_IEEE80211_MCS }, 1566 { 11, IFM_IEEE80211_MCS }, 1567 { 12, IFM_IEEE80211_MCS }, 1568 { 13, IFM_IEEE80211_MCS }, 1569 { 14, IFM_IEEE80211_MCS }, 1570 { 15, IFM_IEEE80211_MCS }, 1571 { 16, IFM_IEEE80211_MCS }, 1572 { 17, IFM_IEEE80211_MCS }, 1573 { 18, IFM_IEEE80211_MCS }, 1574 { 19, IFM_IEEE80211_MCS }, 1575 { 20, IFM_IEEE80211_MCS }, 1576 { 21, IFM_IEEE80211_MCS }, 1577 { 22, IFM_IEEE80211_MCS }, 1578 { 23, IFM_IEEE80211_MCS }, 1579 { 24, IFM_IEEE80211_MCS }, 1580 { 25, IFM_IEEE80211_MCS }, 1581 { 26, IFM_IEEE80211_MCS }, 1582 { 27, IFM_IEEE80211_MCS }, 1583 { 28, IFM_IEEE80211_MCS }, 1584 { 29, IFM_IEEE80211_MCS }, 1585 { 30, IFM_IEEE80211_MCS }, 1586 { 31, IFM_IEEE80211_MCS }, 1587 { 32, IFM_IEEE80211_MCS }, 1588 { 33, IFM_IEEE80211_MCS }, 1589 { 34, IFM_IEEE80211_MCS }, 1590 { 35, IFM_IEEE80211_MCS }, 1591 { 36, IFM_IEEE80211_MCS }, 1592 { 37, IFM_IEEE80211_MCS }, 1593 { 38, IFM_IEEE80211_MCS }, 1594 { 39, IFM_IEEE80211_MCS }, 1595 { 40, IFM_IEEE80211_MCS }, 1596 { 41, IFM_IEEE80211_MCS }, 1597 { 42, IFM_IEEE80211_MCS }, 1598 { 43, IFM_IEEE80211_MCS }, 1599 { 44, IFM_IEEE80211_MCS }, 1600 { 45, IFM_IEEE80211_MCS }, 1601 { 46, IFM_IEEE80211_MCS }, 1602 { 47, IFM_IEEE80211_MCS }, 1603 { 48, IFM_IEEE80211_MCS }, 1604 { 49, IFM_IEEE80211_MCS }, 1605 { 50, IFM_IEEE80211_MCS }, 1606 { 51, IFM_IEEE80211_MCS }, 1607 { 52, IFM_IEEE80211_MCS }, 1608 { 53, IFM_IEEE80211_MCS }, 1609 { 54, IFM_IEEE80211_MCS }, 1610 { 55, IFM_IEEE80211_MCS }, 1611 { 56, IFM_IEEE80211_MCS }, 1612 { 57, IFM_IEEE80211_MCS }, 1613 { 58, IFM_IEEE80211_MCS }, 1614 { 59, IFM_IEEE80211_MCS }, 1615 { 60, IFM_IEEE80211_MCS }, 1616 { 61, IFM_IEEE80211_MCS }, 1617 { 62, IFM_IEEE80211_MCS }, 1618 { 63, IFM_IEEE80211_MCS }, 1619 { 64, IFM_IEEE80211_MCS }, 1620 { 65, IFM_IEEE80211_MCS }, 1621 { 66, IFM_IEEE80211_MCS }, 1622 { 67, IFM_IEEE80211_MCS }, 1623 { 68, IFM_IEEE80211_MCS }, 1624 { 69, IFM_IEEE80211_MCS }, 1625 { 70, IFM_IEEE80211_MCS }, 1626 { 71, IFM_IEEE80211_MCS }, 1627 { 72, IFM_IEEE80211_MCS }, 1628 { 73, IFM_IEEE80211_MCS }, 1629 { 74, IFM_IEEE80211_MCS }, 1630 { 75, IFM_IEEE80211_MCS }, 1631 { 76, IFM_IEEE80211_MCS }, 1632 }; 1633 int m; 1634 1635 /* 1636 * Check 11n rates first for match as an MCS. 1637 */ 1638 if (mode == IEEE80211_MODE_11NA) { 1639 if (rate & IEEE80211_RATE_MCS) { 1640 rate &= ~IEEE80211_RATE_MCS; 1641 m = findmedia(htrates, nitems(htrates), rate); 1642 if (m != IFM_AUTO) 1643 return m | IFM_IEEE80211_11NA; 1644 } 1645 } else if (mode == IEEE80211_MODE_11NG) { 1646 /* NB: 12 is ambiguous, it will be treated as an MCS */ 1647 if (rate & IEEE80211_RATE_MCS) { 1648 rate &= ~IEEE80211_RATE_MCS; 1649 m = findmedia(htrates, nitems(htrates), rate); 1650 if (m != IFM_AUTO) 1651 return m | IFM_IEEE80211_11NG; 1652 } 1653 } 1654 rate &= IEEE80211_RATE_VAL; 1655 switch (mode) { 1656 case IEEE80211_MODE_11A: 1657 case IEEE80211_MODE_HALF: /* XXX good 'nuf */ 1658 case IEEE80211_MODE_QUARTER: 1659 case IEEE80211_MODE_11NA: 1660 case IEEE80211_MODE_TURBO_A: 1661 case IEEE80211_MODE_STURBO_A: 1662 return findmedia(rates, nitems(rates), 1663 rate | IFM_IEEE80211_11A); 1664 case IEEE80211_MODE_11B: 1665 return findmedia(rates, nitems(rates), 1666 rate | IFM_IEEE80211_11B); 1667 case IEEE80211_MODE_FH: 1668 return findmedia(rates, nitems(rates), 1669 rate | IFM_IEEE80211_FH); 1670 case IEEE80211_MODE_AUTO: 1671 /* NB: ic may be NULL for some drivers */ 1672 if (ic != NULL && ic->ic_phytype == IEEE80211_T_FH) 1673 return findmedia(rates, nitems(rates), 1674 rate | IFM_IEEE80211_FH); 1675 /* NB: hack, 11g matches both 11b+11a rates */ 1676 /* fall thru... */ 1677 case IEEE80211_MODE_11G: 1678 case IEEE80211_MODE_11NG: 1679 case IEEE80211_MODE_TURBO_G: 1680 return findmedia(rates, nitems(rates), rate | IFM_IEEE80211_11G); 1681 } 1682 return IFM_AUTO; 1683} 1684 1685int 1686ieee80211_media2rate(int mword) 1687{ 1688 static const int ieeerates[] = { 1689 -1, /* IFM_AUTO */ 1690 0, /* IFM_MANUAL */ 1691 0, /* IFM_NONE */ 1692 2, /* IFM_IEEE80211_FH1 */ 1693 4, /* IFM_IEEE80211_FH2 */ 1694 2, /* IFM_IEEE80211_DS1 */ 1695 4, /* IFM_IEEE80211_DS2 */ 1696 11, /* IFM_IEEE80211_DS5 */ 1697 22, /* IFM_IEEE80211_DS11 */ 1698 44, /* IFM_IEEE80211_DS22 */ 1699 12, /* IFM_IEEE80211_OFDM6 */ 1700 18, /* IFM_IEEE80211_OFDM9 */ 1701 24, /* IFM_IEEE80211_OFDM12 */ 1702 36, /* IFM_IEEE80211_OFDM18 */ 1703 48, /* IFM_IEEE80211_OFDM24 */ 1704 72, /* IFM_IEEE80211_OFDM36 */ 1705 96, /* IFM_IEEE80211_OFDM48 */ 1706 108, /* IFM_IEEE80211_OFDM54 */ 1707 144, /* IFM_IEEE80211_OFDM72 */ 1708 0, /* IFM_IEEE80211_DS354k */ 1709 0, /* IFM_IEEE80211_DS512k */ 1710 6, /* IFM_IEEE80211_OFDM3 */ 1711 9, /* IFM_IEEE80211_OFDM4 */ 1712 54, /* IFM_IEEE80211_OFDM27 */ 1713 -1, /* IFM_IEEE80211_MCS */ 1714 }; 1715 return IFM_SUBTYPE(mword) < nitems(ieeerates) ? 1716 ieeerates[IFM_SUBTYPE(mword)] : 0; 1717} 1718 1719/* 1720 * The following hash function is adapted from "Hash Functions" by Bob Jenkins 1721 * ("Algorithm Alley", Dr. Dobbs Journal, September 1997). 1722 */ 1723#define mix(a, b, c) \ 1724do { \ 1725 a -= b; a -= c; a ^= (c >> 13); \ 1726 b -= c; b -= a; b ^= (a << 8); \ 1727 c -= a; c -= b; c ^= (b >> 13); \ 1728 a -= b; a -= c; a ^= (c >> 12); \ 1729 b -= c; b -= a; b ^= (a << 16); \ 1730 c -= a; c -= b; c ^= (b >> 5); \ 1731 a -= b; a -= c; a ^= (c >> 3); \ 1732 b -= c; b -= a; b ^= (a << 10); \ 1733 c -= a; c -= b; c ^= (b >> 15); \ 1734} while (/*CONSTCOND*/0) 1735 1736uint32_t 1737ieee80211_mac_hash(const struct ieee80211com *ic, 1738 const uint8_t addr[IEEE80211_ADDR_LEN]) 1739{ 1740 uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = ic->ic_hash_key; 1741 1742 b += addr[5] << 8; 1743 b += addr[4]; 1744 a += addr[3] << 24; 1745 a += addr[2] << 16; 1746 a += addr[1] << 8; 1747 a += addr[0]; 1748 1749 mix(a, b, c); 1750 1751 return c; 1752} 1753#undef mix 1754