ieee80211.c revision 283566
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 283566 2015-05-26 12:40:27Z 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#include <sys/socket.h> 39 40#include <machine/stdarg.h> 41 42#include <net/if.h> 43#include <net/if_var.h> 44#include <net/if_dl.h> 45#include <net/if_media.h> 46#include <net/if_types.h> 47#include <net/ethernet.h> 48 49#include <net80211/ieee80211_var.h> 50#include <net80211/ieee80211_regdomain.h> 51#ifdef IEEE80211_SUPPORT_SUPERG 52#include <net80211/ieee80211_superg.h> 53#endif 54#include <net80211/ieee80211_ratectl.h> 55 56#include <net/bpf.h> 57 58const char *ieee80211_phymode_name[IEEE80211_MODE_MAX] = { 59 [IEEE80211_MODE_AUTO] = "auto", 60 [IEEE80211_MODE_11A] = "11a", 61 [IEEE80211_MODE_11B] = "11b", 62 [IEEE80211_MODE_11G] = "11g", 63 [IEEE80211_MODE_FH] = "FH", 64 [IEEE80211_MODE_TURBO_A] = "turboA", 65 [IEEE80211_MODE_TURBO_G] = "turboG", 66 [IEEE80211_MODE_STURBO_A] = "sturboA", 67 [IEEE80211_MODE_HALF] = "half", 68 [IEEE80211_MODE_QUARTER] = "quarter", 69 [IEEE80211_MODE_11NA] = "11na", 70 [IEEE80211_MODE_11NG] = "11ng", 71}; 72/* map ieee80211_opmode to the corresponding capability bit */ 73const int ieee80211_opcap[IEEE80211_OPMODE_MAX] = { 74 [IEEE80211_M_IBSS] = IEEE80211_C_IBSS, 75 [IEEE80211_M_WDS] = IEEE80211_C_WDS, 76 [IEEE80211_M_STA] = IEEE80211_C_STA, 77 [IEEE80211_M_AHDEMO] = IEEE80211_C_AHDEMO, 78 [IEEE80211_M_HOSTAP] = IEEE80211_C_HOSTAP, 79 [IEEE80211_M_MONITOR] = IEEE80211_C_MONITOR, 80#ifdef IEEE80211_SUPPORT_MESH 81 [IEEE80211_M_MBSS] = IEEE80211_C_MBSS, 82#endif 83}; 84 85const uint8_t ieee80211broadcastaddr[IEEE80211_ADDR_LEN] = 86 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 87 88static void ieee80211_syncflag_locked(struct ieee80211com *ic, int flag); 89static void ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag); 90static void ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag); 91static int ieee80211_media_setup(struct ieee80211com *ic, 92 struct ifmedia *media, int caps, int addsta, 93 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat); 94static void ieee80211com_media_status(struct ifnet *, struct ifmediareq *); 95static int ieee80211com_media_change(struct ifnet *); 96static int media_status(enum ieee80211_opmode, 97 const struct ieee80211_channel *); 98 99MALLOC_DEFINE(M_80211_VAP, "80211vap", "802.11 vap state"); 100 101/* 102 * Default supported rates for 802.11 operation (in IEEE .5Mb units). 103 */ 104#define B(r) ((r) | IEEE80211_RATE_BASIC) 105static const struct ieee80211_rateset ieee80211_rateset_11a = 106 { 8, { B(12), 18, B(24), 36, B(48), 72, 96, 108 } }; 107static const struct ieee80211_rateset ieee80211_rateset_half = 108 { 8, { B(6), 9, B(12), 18, B(24), 36, 48, 54 } }; 109static const struct ieee80211_rateset ieee80211_rateset_quarter = 110 { 8, { B(3), 4, B(6), 9, B(12), 18, 24, 27 } }; 111static const struct ieee80211_rateset ieee80211_rateset_11b = 112 { 4, { B(2), B(4), B(11), B(22) } }; 113/* NB: OFDM rates are handled specially based on mode */ 114static const struct ieee80211_rateset ieee80211_rateset_11g = 115 { 12, { B(2), B(4), B(11), B(22), 12, 18, 24, 36, 48, 72, 96, 108 } }; 116#undef B 117 118/* 119 * Fill in 802.11 available channel set, mark 120 * all available channels as active, and pick 121 * a default channel if not already specified. 122 */ 123static void 124ieee80211_chan_init(struct ieee80211com *ic) 125{ 126#define DEFAULTRATES(m, def) do { \ 127 if (ic->ic_sup_rates[m].rs_nrates == 0) \ 128 ic->ic_sup_rates[m] = def; \ 129} while (0) 130 struct ieee80211_channel *c; 131 int i; 132 133 KASSERT(0 < ic->ic_nchans && ic->ic_nchans <= IEEE80211_CHAN_MAX, 134 ("invalid number of channels specified: %u", ic->ic_nchans)); 135 memset(ic->ic_chan_avail, 0, sizeof(ic->ic_chan_avail)); 136 memset(ic->ic_modecaps, 0, sizeof(ic->ic_modecaps)); 137 setbit(ic->ic_modecaps, IEEE80211_MODE_AUTO); 138 for (i = 0; i < ic->ic_nchans; i++) { 139 c = &ic->ic_channels[i]; 140 KASSERT(c->ic_flags != 0, ("channel with no flags")); 141 /* 142 * Help drivers that work only with frequencies by filling 143 * in IEEE channel #'s if not already calculated. Note this 144 * mimics similar work done in ieee80211_setregdomain when 145 * changing regulatory state. 146 */ 147 if (c->ic_ieee == 0) 148 c->ic_ieee = ieee80211_mhz2ieee(c->ic_freq,c->ic_flags); 149 if (IEEE80211_IS_CHAN_HT40(c) && c->ic_extieee == 0) 150 c->ic_extieee = ieee80211_mhz2ieee(c->ic_freq + 151 (IEEE80211_IS_CHAN_HT40U(c) ? 20 : -20), 152 c->ic_flags); 153 /* default max tx power to max regulatory */ 154 if (c->ic_maxpower == 0) 155 c->ic_maxpower = 2*c->ic_maxregpower; 156 setbit(ic->ic_chan_avail, c->ic_ieee); 157 /* 158 * Identify mode capabilities. 159 */ 160 if (IEEE80211_IS_CHAN_A(c)) 161 setbit(ic->ic_modecaps, IEEE80211_MODE_11A); 162 if (IEEE80211_IS_CHAN_B(c)) 163 setbit(ic->ic_modecaps, IEEE80211_MODE_11B); 164 if (IEEE80211_IS_CHAN_ANYG(c)) 165 setbit(ic->ic_modecaps, IEEE80211_MODE_11G); 166 if (IEEE80211_IS_CHAN_FHSS(c)) 167 setbit(ic->ic_modecaps, IEEE80211_MODE_FH); 168 if (IEEE80211_IS_CHAN_108A(c)) 169 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_A); 170 if (IEEE80211_IS_CHAN_108G(c)) 171 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_G); 172 if (IEEE80211_IS_CHAN_ST(c)) 173 setbit(ic->ic_modecaps, IEEE80211_MODE_STURBO_A); 174 if (IEEE80211_IS_CHAN_HALF(c)) 175 setbit(ic->ic_modecaps, IEEE80211_MODE_HALF); 176 if (IEEE80211_IS_CHAN_QUARTER(c)) 177 setbit(ic->ic_modecaps, IEEE80211_MODE_QUARTER); 178 if (IEEE80211_IS_CHAN_HTA(c)) 179 setbit(ic->ic_modecaps, IEEE80211_MODE_11NA); 180 if (IEEE80211_IS_CHAN_HTG(c)) 181 setbit(ic->ic_modecaps, IEEE80211_MODE_11NG); 182 } 183 /* initialize candidate channels to all available */ 184 memcpy(ic->ic_chan_active, ic->ic_chan_avail, 185 sizeof(ic->ic_chan_avail)); 186 187 /* sort channel table to allow lookup optimizations */ 188 ieee80211_sort_channels(ic->ic_channels, ic->ic_nchans); 189 190 /* invalidate any previous state */ 191 ic->ic_bsschan = IEEE80211_CHAN_ANYC; 192 ic->ic_prevchan = NULL; 193 ic->ic_csa_newchan = NULL; 194 /* arbitrarily pick the first channel */ 195 ic->ic_curchan = &ic->ic_channels[0]; 196 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 197 198 /* fillin well-known rate sets if driver has not specified */ 199 DEFAULTRATES(IEEE80211_MODE_11B, ieee80211_rateset_11b); 200 DEFAULTRATES(IEEE80211_MODE_11G, ieee80211_rateset_11g); 201 DEFAULTRATES(IEEE80211_MODE_11A, ieee80211_rateset_11a); 202 DEFAULTRATES(IEEE80211_MODE_TURBO_A, ieee80211_rateset_11a); 203 DEFAULTRATES(IEEE80211_MODE_TURBO_G, ieee80211_rateset_11g); 204 DEFAULTRATES(IEEE80211_MODE_STURBO_A, ieee80211_rateset_11a); 205 DEFAULTRATES(IEEE80211_MODE_HALF, ieee80211_rateset_half); 206 DEFAULTRATES(IEEE80211_MODE_QUARTER, ieee80211_rateset_quarter); 207 DEFAULTRATES(IEEE80211_MODE_11NA, ieee80211_rateset_11a); 208 DEFAULTRATES(IEEE80211_MODE_11NG, ieee80211_rateset_11g); 209 210 /* 211 * Setup required information to fill the mcsset field, if driver did 212 * not. Assume a 2T2R setup for historic reasons. 213 */ 214 if (ic->ic_rxstream == 0) 215 ic->ic_rxstream = 2; 216 if (ic->ic_txstream == 0) 217 ic->ic_txstream = 2; 218 219 /* 220 * Set auto mode to reset active channel state and any desired channel. 221 */ 222 (void) ieee80211_setmode(ic, IEEE80211_MODE_AUTO); 223#undef DEFAULTRATES 224} 225 226static void 227null_update_mcast(struct ieee80211com *ic) 228{ 229 230 ic_printf(ic, "need multicast update callback\n"); 231} 232 233static void 234null_update_promisc(struct ieee80211com *ic) 235{ 236 237 ic_printf(ic, "need promiscuous mode update callback\n"); 238} 239 240static int 241null_transmit(struct ifnet *ifp, struct mbuf *m) 242{ 243 m_freem(m); 244 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 245 return EACCES; /* XXX EIO/EPERM? */ 246} 247 248static int 249null_output(struct ifnet *ifp, struct mbuf *m, 250 const struct sockaddr *dst, struct route *ro) 251{ 252 if_printf(ifp, "discard raw packet\n"); 253 return null_transmit(ifp, m); 254} 255 256static void 257null_input(struct ifnet *ifp, struct mbuf *m) 258{ 259 if_printf(ifp, "if_input should not be called\n"); 260 m_freem(m); 261} 262 263static void 264null_update_chw(struct ieee80211com *ic) 265{ 266 267 ic_printf(ic, "%s: need callback\n", __func__); 268} 269 270int 271ic_printf(struct ieee80211com *ic, const char * fmt, ...) 272{ 273 va_list ap; 274 int retval; 275 276 retval = printf("%s: ", ic->ic_name); 277 va_start(ap, fmt); 278 retval += vprintf(fmt, ap); 279 va_end(ap); 280 return (retval); 281} 282 283/* 284 * Attach/setup the common net80211 state. Called by 285 * the driver on attach to prior to creating any vap's. 286 */ 287void 288ieee80211_ifattach(struct ieee80211com *ic, 289 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 290{ 291 struct ifnet *ifp = ic->ic_ifp; 292 struct sockaddr_dl *sdl; 293 struct ifaddr *ifa; 294 295 KASSERT(ifp->if_type == IFT_IEEE80211, ("if_type %d", ifp->if_type)); 296 297 IEEE80211_LOCK_INIT(ic, ic->ic_name); 298 IEEE80211_TX_LOCK_INIT(ic, ic->ic_name); 299 TAILQ_INIT(&ic->ic_vaps); 300 301 /* Create a taskqueue for all state changes */ 302 ic->ic_tq = taskqueue_create("ic_taskq", M_WAITOK | M_ZERO, 303 taskqueue_thread_enqueue, &ic->ic_tq); 304 taskqueue_start_threads(&ic->ic_tq, 1, PI_NET, "%s net80211 taskq", 305 ic->ic_name); 306 /* 307 * Fill in 802.11 available channel set, mark all 308 * available channels as active, and pick a default 309 * channel if not already specified. 310 */ 311 ieee80211_media_init(ic); 312 313 ic->ic_update_mcast = null_update_mcast; 314 ic->ic_update_promisc = null_update_promisc; 315 ic->ic_update_chw = null_update_chw; 316 317 ic->ic_hash_key = arc4random(); 318 ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT; 319 ic->ic_lintval = ic->ic_bintval; 320 ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX; 321 322 ieee80211_crypto_attach(ic); 323 ieee80211_node_attach(ic); 324 ieee80211_power_attach(ic); 325 ieee80211_proto_attach(ic); 326#ifdef IEEE80211_SUPPORT_SUPERG 327 ieee80211_superg_attach(ic); 328#endif 329 ieee80211_ht_attach(ic); 330 ieee80211_scan_attach(ic); 331 ieee80211_regdomain_attach(ic); 332 ieee80211_dfs_attach(ic); 333 334 ieee80211_sysctl_attach(ic); 335 336 ifp->if_addrlen = IEEE80211_ADDR_LEN; 337 ifp->if_hdrlen = 0; 338 339 CURVNET_SET(vnet0); 340 341 if_attach(ifp); 342 343 ifp->if_mtu = IEEE80211_MTU_MAX; 344 ifp->if_broadcastaddr = ieee80211broadcastaddr; 345 ifp->if_output = null_output; 346 ifp->if_input = null_input; /* just in case */ 347 ifp->if_resolvemulti = NULL; /* NB: callers check */ 348 349 ifa = ifaddr_byindex(ifp->if_index); 350 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); 351 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 352 sdl->sdl_type = IFT_ETHER; /* XXX IFT_IEEE80211? */ 353 sdl->sdl_alen = IEEE80211_ADDR_LEN; 354 IEEE80211_ADDR_COPY(LLADDR(sdl), macaddr); 355 ifa_free(ifa); 356 357 CURVNET_RESTORE(); 358} 359 360/* 361 * Detach net80211 state on device detach. Tear down 362 * all vap's and reclaim all common state prior to the 363 * device state going away. Note we may call back into 364 * driver; it must be prepared for this. 365 */ 366void 367ieee80211_ifdetach(struct ieee80211com *ic) 368{ 369 struct ifnet *ifp = ic->ic_ifp; 370 struct ieee80211vap *vap; 371 372 /* 373 * This detaches the main interface, but not the vaps. 374 * Each VAP may be in a separate VIMAGE. 375 */ 376 CURVNET_SET(ifp->if_vnet); 377 if_detach(ifp); 378 CURVNET_RESTORE(); 379 380 /* 381 * The VAP is responsible for setting and clearing 382 * the VIMAGE context. 383 */ 384 while ((vap = TAILQ_FIRST(&ic->ic_vaps)) != NULL) 385 ieee80211_vap_destroy(vap); 386 ieee80211_waitfor_parent(ic); 387 388 ieee80211_sysctl_detach(ic); 389 ieee80211_dfs_detach(ic); 390 ieee80211_regdomain_detach(ic); 391 ieee80211_scan_detach(ic); 392#ifdef IEEE80211_SUPPORT_SUPERG 393 ieee80211_superg_detach(ic); 394#endif 395 ieee80211_ht_detach(ic); 396 /* NB: must be called before ieee80211_node_detach */ 397 ieee80211_proto_detach(ic); 398 ieee80211_crypto_detach(ic); 399 ieee80211_power_detach(ic); 400 ieee80211_node_detach(ic); 401 402 /* XXX VNET needed? */ 403 ifmedia_removeall(&ic->ic_media); 404 405 taskqueue_free(ic->ic_tq); 406 IEEE80211_TX_LOCK_DESTROY(ic); 407 IEEE80211_LOCK_DESTROY(ic); 408} 409 410/* 411 * Default reset method for use with the ioctl support. This 412 * method is invoked after any state change in the 802.11 413 * layer that should be propagated to the hardware but not 414 * require re-initialization of the 802.11 state machine (e.g 415 * rescanning for an ap). We always return ENETRESET which 416 * should cause the driver to re-initialize the device. Drivers 417 * can override this method to implement more optimized support. 418 */ 419static int 420default_reset(struct ieee80211vap *vap, u_long cmd) 421{ 422 return ENETRESET; 423} 424 425/* 426 * Prepare a vap for use. Drivers use this call to 427 * setup net80211 state in new vap's prior attaching 428 * them with ieee80211_vap_attach (below). 429 */ 430int 431ieee80211_vap_setup(struct ieee80211com *ic, struct ieee80211vap *vap, 432 const char name[IFNAMSIZ], int unit, enum ieee80211_opmode opmode, 433 int flags, const uint8_t bssid[IEEE80211_ADDR_LEN], 434 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 435{ 436 struct ifnet *ifp; 437 438 ifp = if_alloc(IFT_ETHER); 439 if (ifp == NULL) { 440 ic_printf(ic, "%s: unable to allocate ifnet\n", 441 __func__); 442 return ENOMEM; 443 } 444 if_initname(ifp, name, unit); 445 ifp->if_softc = vap; /* back pointer */ 446 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 447 ifp->if_transmit = ieee80211_vap_transmit; 448 ifp->if_qflush = ieee80211_vap_qflush; 449 ifp->if_ioctl = ieee80211_ioctl; 450 ifp->if_init = ieee80211_init; 451 452 vap->iv_ifp = ifp; 453 vap->iv_ic = ic; 454 vap->iv_flags = ic->ic_flags; /* propagate common flags */ 455 vap->iv_flags_ext = ic->ic_flags_ext; 456 vap->iv_flags_ven = ic->ic_flags_ven; 457 vap->iv_caps = ic->ic_caps &~ IEEE80211_C_OPMODE; 458 vap->iv_htcaps = ic->ic_htcaps; 459 vap->iv_htextcaps = ic->ic_htextcaps; 460 vap->iv_opmode = opmode; 461 vap->iv_caps |= ieee80211_opcap[opmode]; 462 switch (opmode) { 463 case IEEE80211_M_WDS: 464 /* 465 * WDS links must specify the bssid of the far end. 466 * For legacy operation this is a static relationship. 467 * For non-legacy operation the station must associate 468 * and be authorized to pass traffic. Plumbing the 469 * vap to the proper node happens when the vap 470 * transitions to RUN state. 471 */ 472 IEEE80211_ADDR_COPY(vap->iv_des_bssid, bssid); 473 vap->iv_flags |= IEEE80211_F_DESBSSID; 474 if (flags & IEEE80211_CLONE_WDSLEGACY) 475 vap->iv_flags_ext |= IEEE80211_FEXT_WDSLEGACY; 476 break; 477#ifdef IEEE80211_SUPPORT_TDMA 478 case IEEE80211_M_AHDEMO: 479 if (flags & IEEE80211_CLONE_TDMA) { 480 /* NB: checked before clone operation allowed */ 481 KASSERT(ic->ic_caps & IEEE80211_C_TDMA, 482 ("not TDMA capable, ic_caps 0x%x", ic->ic_caps)); 483 /* 484 * Propagate TDMA capability to mark vap; this 485 * cannot be removed and is used to distinguish 486 * regular ahdemo operation from ahdemo+tdma. 487 */ 488 vap->iv_caps |= IEEE80211_C_TDMA; 489 } 490 break; 491#endif 492 default: 493 break; 494 } 495 /* auto-enable s/w beacon miss support */ 496 if (flags & IEEE80211_CLONE_NOBEACONS) 497 vap->iv_flags_ext |= IEEE80211_FEXT_SWBMISS; 498 /* auto-generated or user supplied MAC address */ 499 if (flags & (IEEE80211_CLONE_BSSID|IEEE80211_CLONE_MACADDR)) 500 vap->iv_flags_ext |= IEEE80211_FEXT_UNIQMAC; 501 /* 502 * Enable various functionality by default if we're 503 * capable; the driver can override us if it knows better. 504 */ 505 if (vap->iv_caps & IEEE80211_C_WME) 506 vap->iv_flags |= IEEE80211_F_WME; 507 if (vap->iv_caps & IEEE80211_C_BURST) 508 vap->iv_flags |= IEEE80211_F_BURST; 509 /* NB: bg scanning only makes sense for station mode right now */ 510 if (vap->iv_opmode == IEEE80211_M_STA && 511 (vap->iv_caps & IEEE80211_C_BGSCAN)) 512 vap->iv_flags |= IEEE80211_F_BGSCAN; 513 vap->iv_flags |= IEEE80211_F_DOTH; /* XXX no cap, just ena */ 514 /* NB: DFS support only makes sense for ap mode right now */ 515 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 516 (vap->iv_caps & IEEE80211_C_DFS)) 517 vap->iv_flags_ext |= IEEE80211_FEXT_DFS; 518 519 vap->iv_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */ 520 vap->iv_bmissthreshold = IEEE80211_HWBMISS_DEFAULT; 521 vap->iv_dtim_period = IEEE80211_DTIM_DEFAULT; 522 /* 523 * Install a default reset method for the ioctl support; 524 * the driver can override this. 525 */ 526 vap->iv_reset = default_reset; 527 528 IEEE80211_ADDR_COPY(vap->iv_myaddr, macaddr); 529 530 ieee80211_sysctl_vattach(vap); 531 ieee80211_crypto_vattach(vap); 532 ieee80211_node_vattach(vap); 533 ieee80211_power_vattach(vap); 534 ieee80211_proto_vattach(vap); 535#ifdef IEEE80211_SUPPORT_SUPERG 536 ieee80211_superg_vattach(vap); 537#endif 538 ieee80211_ht_vattach(vap); 539 ieee80211_scan_vattach(vap); 540 ieee80211_regdomain_vattach(vap); 541 ieee80211_radiotap_vattach(vap); 542 ieee80211_ratectl_set(vap, IEEE80211_RATECTL_NONE); 543 544 return 0; 545} 546 547/* 548 * Activate a vap. State should have been prepared with a 549 * call to ieee80211_vap_setup and by the driver. On return 550 * from this call the vap is ready for use. 551 */ 552int 553ieee80211_vap_attach(struct ieee80211vap *vap, 554 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) 555{ 556 struct ifnet *ifp = vap->iv_ifp; 557 struct ieee80211com *ic = vap->iv_ic; 558 struct ifmediareq imr; 559 int maxrate; 560 561 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 562 "%s: %s parent %s flags 0x%x flags_ext 0x%x\n", 563 __func__, ieee80211_opmode_name[vap->iv_opmode], 564 ic->ic_name, vap->iv_flags, vap->iv_flags_ext); 565 566 /* 567 * Do late attach work that cannot happen until after 568 * the driver has had a chance to override defaults. 569 */ 570 ieee80211_node_latevattach(vap); 571 ieee80211_power_latevattach(vap); 572 573 maxrate = ieee80211_media_setup(ic, &vap->iv_media, vap->iv_caps, 574 vap->iv_opmode == IEEE80211_M_STA, media_change, media_stat); 575 ieee80211_media_status(ifp, &imr); 576 /* NB: strip explicit mode; we're actually in autoselect */ 577 ifmedia_set(&vap->iv_media, 578 imr.ifm_active &~ (IFM_MMASK | IFM_IEEE80211_TURBO)); 579 if (maxrate) 580 ifp->if_baudrate = IF_Mbps(maxrate); 581 582 ether_ifattach(ifp, vap->iv_myaddr); 583 /* hook output method setup by ether_ifattach */ 584 vap->iv_output = ifp->if_output; 585 ifp->if_output = ieee80211_output; 586 /* NB: if_mtu set by ether_ifattach to ETHERMTU */ 587 588 IEEE80211_LOCK(ic); 589 TAILQ_INSERT_TAIL(&ic->ic_vaps, vap, iv_next); 590 ieee80211_syncflag_locked(ic, IEEE80211_F_WME); 591#ifdef IEEE80211_SUPPORT_SUPERG 592 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); 593#endif 594 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); 595 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); 596 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT); 597 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40); 598 ieee80211_syncifflag_locked(ic, IFF_PROMISC); 599 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI); 600 IEEE80211_UNLOCK(ic); 601 602 return 1; 603} 604 605/* 606 * Tear down vap state and reclaim the ifnet. 607 * The driver is assumed to have prepared for 608 * this; e.g. by turning off interrupts for the 609 * underlying device. 610 */ 611void 612ieee80211_vap_detach(struct ieee80211vap *vap) 613{ 614 struct ieee80211com *ic = vap->iv_ic; 615 struct ifnet *ifp = vap->iv_ifp; 616 617 CURVNET_SET(ifp->if_vnet); 618 619 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s parent %s\n", 620 __func__, ieee80211_opmode_name[vap->iv_opmode], ic->ic_name); 621 622 /* NB: bpfdetach is called by ether_ifdetach and claims all taps */ 623 ether_ifdetach(ifp); 624 625 ieee80211_stop(vap); 626 627 /* 628 * Flush any deferred vap tasks. 629 */ 630 ieee80211_draintask(ic, &vap->iv_nstate_task); 631 ieee80211_draintask(ic, &vap->iv_swbmiss_task); 632 633 /* XXX band-aid until ifnet handles this for us */ 634 taskqueue_drain(taskqueue_swi, &ifp->if_linktask); 635 636 IEEE80211_LOCK(ic); 637 KASSERT(vap->iv_state == IEEE80211_S_INIT , ("vap still running")); 638 TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next); 639 ieee80211_syncflag_locked(ic, IEEE80211_F_WME); 640#ifdef IEEE80211_SUPPORT_SUPERG 641 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); 642#endif 643 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); 644 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); 645 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT); 646 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40); 647 /* NB: this handles the bpfdetach done below */ 648 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_BPF); 649 ieee80211_syncifflag_locked(ic, IFF_PROMISC); 650 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI); 651 IEEE80211_UNLOCK(ic); 652 653 ifmedia_removeall(&vap->iv_media); 654 655 ieee80211_radiotap_vdetach(vap); 656 ieee80211_regdomain_vdetach(vap); 657 ieee80211_scan_vdetach(vap); 658#ifdef IEEE80211_SUPPORT_SUPERG 659 ieee80211_superg_vdetach(vap); 660#endif 661 ieee80211_ht_vdetach(vap); 662 /* NB: must be before ieee80211_node_vdetach */ 663 ieee80211_proto_vdetach(vap); 664 ieee80211_crypto_vdetach(vap); 665 ieee80211_power_vdetach(vap); 666 ieee80211_node_vdetach(vap); 667 ieee80211_sysctl_vdetach(vap); 668 669 if_free(ifp); 670 671 CURVNET_RESTORE(); 672} 673 674/* 675 * Synchronize flag bit state in the parent ifnet structure 676 * according to the state of all vap ifnet's. This is used, 677 * for example, to handle IFF_PROMISC and IFF_ALLMULTI. 678 */ 679void 680ieee80211_syncifflag_locked(struct ieee80211com *ic, int flag) 681{ 682 struct ifnet *ifp = ic->ic_ifp; 683 struct ieee80211vap *vap; 684 int bit, oflags; 685 686 IEEE80211_LOCK_ASSERT(ic); 687 688 bit = 0; 689 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 690 if (vap->iv_ifp->if_flags & flag) { 691 /* 692 * XXX the bridge sets PROMISC but we don't want to 693 * enable it on the device, discard here so all the 694 * drivers don't need to special-case it 695 */ 696 if (flag == IFF_PROMISC && 697 !(vap->iv_opmode == IEEE80211_M_MONITOR || 698 (vap->iv_opmode == IEEE80211_M_AHDEMO && 699 (vap->iv_caps & IEEE80211_C_TDMA) == 0))) 700 continue; 701 bit = 1; 702 break; 703 } 704 oflags = ifp->if_flags; 705 if (bit) 706 ifp->if_flags |= flag; 707 else 708 ifp->if_flags &= ~flag; 709 if ((ifp->if_flags ^ oflags) & flag) { 710 /* XXX should we return 1/0 and let caller do this? */ 711 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 712 if (flag == IFF_PROMISC) 713 ieee80211_runtask(ic, &ic->ic_promisc_task); 714 else if (flag == IFF_ALLMULTI) 715 ieee80211_runtask(ic, &ic->ic_mcast_task); 716 } 717 } 718} 719 720/* 721 * Synchronize flag bit state in the com structure 722 * according to the state of all vap's. This is used, 723 * for example, to handle state changes via ioctls. 724 */ 725static void 726ieee80211_syncflag_locked(struct ieee80211com *ic, int flag) 727{ 728 struct ieee80211vap *vap; 729 int bit; 730 731 IEEE80211_LOCK_ASSERT(ic); 732 733 bit = 0; 734 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 735 if (vap->iv_flags & flag) { 736 bit = 1; 737 break; 738 } 739 if (bit) 740 ic->ic_flags |= flag; 741 else 742 ic->ic_flags &= ~flag; 743} 744 745void 746ieee80211_syncflag(struct ieee80211vap *vap, int flag) 747{ 748 struct ieee80211com *ic = vap->iv_ic; 749 750 IEEE80211_LOCK(ic); 751 if (flag < 0) { 752 flag = -flag; 753 vap->iv_flags &= ~flag; 754 } else 755 vap->iv_flags |= flag; 756 ieee80211_syncflag_locked(ic, flag); 757 IEEE80211_UNLOCK(ic); 758} 759 760/* 761 * Synchronize flags_ht bit state in the com structure 762 * according to the state of all vap's. This is used, 763 * for example, to handle state changes via ioctls. 764 */ 765static void 766ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag) 767{ 768 struct ieee80211vap *vap; 769 int bit; 770 771 IEEE80211_LOCK_ASSERT(ic); 772 773 bit = 0; 774 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 775 if (vap->iv_flags_ht & flag) { 776 bit = 1; 777 break; 778 } 779 if (bit) 780 ic->ic_flags_ht |= flag; 781 else 782 ic->ic_flags_ht &= ~flag; 783} 784 785void 786ieee80211_syncflag_ht(struct ieee80211vap *vap, int flag) 787{ 788 struct ieee80211com *ic = vap->iv_ic; 789 790 IEEE80211_LOCK(ic); 791 if (flag < 0) { 792 flag = -flag; 793 vap->iv_flags_ht &= ~flag; 794 } else 795 vap->iv_flags_ht |= flag; 796 ieee80211_syncflag_ht_locked(ic, flag); 797 IEEE80211_UNLOCK(ic); 798} 799 800/* 801 * Synchronize flags_ext bit state in the com structure 802 * according to the state of all vap's. This is used, 803 * for example, to handle state changes via ioctls. 804 */ 805static void 806ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag) 807{ 808 struct ieee80211vap *vap; 809 int bit; 810 811 IEEE80211_LOCK_ASSERT(ic); 812 813 bit = 0; 814 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 815 if (vap->iv_flags_ext & flag) { 816 bit = 1; 817 break; 818 } 819 if (bit) 820 ic->ic_flags_ext |= flag; 821 else 822 ic->ic_flags_ext &= ~flag; 823} 824 825void 826ieee80211_syncflag_ext(struct ieee80211vap *vap, int flag) 827{ 828 struct ieee80211com *ic = vap->iv_ic; 829 830 IEEE80211_LOCK(ic); 831 if (flag < 0) { 832 flag = -flag; 833 vap->iv_flags_ext &= ~flag; 834 } else 835 vap->iv_flags_ext |= flag; 836 ieee80211_syncflag_ext_locked(ic, flag); 837 IEEE80211_UNLOCK(ic); 838} 839 840static __inline int 841mapgsm(u_int freq, u_int flags) 842{ 843 freq *= 10; 844 if (flags & IEEE80211_CHAN_QUARTER) 845 freq += 5; 846 else if (flags & IEEE80211_CHAN_HALF) 847 freq += 10; 848 else 849 freq += 20; 850 /* NB: there is no 907/20 wide but leave room */ 851 return (freq - 906*10) / 5; 852} 853 854static __inline int 855mappsb(u_int freq, u_int flags) 856{ 857 return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5; 858} 859 860/* 861 * Convert MHz frequency to IEEE channel number. 862 */ 863int 864ieee80211_mhz2ieee(u_int freq, u_int flags) 865{ 866#define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990) 867 if (flags & IEEE80211_CHAN_GSM) 868 return mapgsm(freq, flags); 869 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 870 if (freq == 2484) 871 return 14; 872 if (freq < 2484) 873 return ((int) freq - 2407) / 5; 874 else 875 return 15 + ((freq - 2512) / 20); 876 } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */ 877 if (freq <= 5000) { 878 /* XXX check regdomain? */ 879 if (IS_FREQ_IN_PSB(freq)) 880 return mappsb(freq, flags); 881 return (freq - 4000) / 5; 882 } else 883 return (freq - 5000) / 5; 884 } else { /* either, guess */ 885 if (freq == 2484) 886 return 14; 887 if (freq < 2484) { 888 if (907 <= freq && freq <= 922) 889 return mapgsm(freq, flags); 890 return ((int) freq - 2407) / 5; 891 } 892 if (freq < 5000) { 893 if (IS_FREQ_IN_PSB(freq)) 894 return mappsb(freq, flags); 895 else if (freq > 4900) 896 return (freq - 4000) / 5; 897 else 898 return 15 + ((freq - 2512) / 20); 899 } 900 return (freq - 5000) / 5; 901 } 902#undef IS_FREQ_IN_PSB 903} 904 905/* 906 * Convert channel to IEEE channel number. 907 */ 908int 909ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c) 910{ 911 if (c == NULL) { 912 ic_printf(ic, "invalid channel (NULL)\n"); 913 return 0; /* XXX */ 914 } 915 return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee); 916} 917 918/* 919 * Convert IEEE channel number to MHz frequency. 920 */ 921u_int 922ieee80211_ieee2mhz(u_int chan, u_int flags) 923{ 924 if (flags & IEEE80211_CHAN_GSM) 925 return 907 + 5 * (chan / 10); 926 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 927 if (chan == 14) 928 return 2484; 929 if (chan < 14) 930 return 2407 + chan*5; 931 else 932 return 2512 + ((chan-15)*20); 933 } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */ 934 if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) { 935 chan -= 37; 936 return 4940 + chan*5 + (chan % 5 ? 2 : 0); 937 } 938 return 5000 + (chan*5); 939 } else { /* either, guess */ 940 /* XXX can't distinguish PSB+GSM channels */ 941 if (chan == 14) 942 return 2484; 943 if (chan < 14) /* 0-13 */ 944 return 2407 + chan*5; 945 if (chan < 27) /* 15-26 */ 946 return 2512 + ((chan-15)*20); 947 return 5000 + (chan*5); 948 } 949} 950 951/* 952 * Locate a channel given a frequency+flags. We cache 953 * the previous lookup to optimize switching between two 954 * channels--as happens with dynamic turbo. 955 */ 956struct ieee80211_channel * 957ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags) 958{ 959 struct ieee80211_channel *c; 960 int i; 961 962 flags &= IEEE80211_CHAN_ALLTURBO; 963 c = ic->ic_prevchan; 964 if (c != NULL && c->ic_freq == freq && 965 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 966 return c; 967 /* brute force search */ 968 for (i = 0; i < ic->ic_nchans; i++) { 969 c = &ic->ic_channels[i]; 970 if (c->ic_freq == freq && 971 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 972 return c; 973 } 974 return NULL; 975} 976 977/* 978 * Locate a channel given a channel number+flags. We cache 979 * the previous lookup to optimize switching between two 980 * channels--as happens with dynamic turbo. 981 */ 982struct ieee80211_channel * 983ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags) 984{ 985 struct ieee80211_channel *c; 986 int i; 987 988 flags &= IEEE80211_CHAN_ALLTURBO; 989 c = ic->ic_prevchan; 990 if (c != NULL && c->ic_ieee == ieee && 991 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 992 return c; 993 /* brute force search */ 994 for (i = 0; i < ic->ic_nchans; i++) { 995 c = &ic->ic_channels[i]; 996 if (c->ic_ieee == ieee && 997 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 998 return c; 999 } 1000 return NULL; 1001} 1002 1003/* 1004 * Lookup a channel suitable for the given rx status. 1005 * 1006 * This is used to find a channel for a frame (eg beacon, probe 1007 * response) based purely on the received PHY information. 1008 * 1009 * For now it tries to do it based on R_FREQ / R_IEEE. 1010 * This is enough for 11bg and 11a (and thus 11ng/11na) 1011 * but it will not be enough for GSM, PSB channels and the 1012 * like. It also doesn't know about legacy-turbog and 1013 * legacy-turbo modes, which some offload NICs actually 1014 * support in weird ways. 1015 * 1016 * Takes the ic and rxstatus; returns the channel or NULL 1017 * if not found. 1018 * 1019 * XXX TODO: Add support for that when the need arises. 1020 */ 1021struct ieee80211_channel * 1022ieee80211_lookup_channel_rxstatus(struct ieee80211vap *vap, 1023 const struct ieee80211_rx_stats *rxs) 1024{ 1025 struct ieee80211com *ic = vap->iv_ic; 1026 uint32_t flags; 1027 struct ieee80211_channel *c; 1028 1029 if (rxs == NULL) 1030 return (NULL); 1031 1032 /* 1033 * Strictly speaking we only use freq for now, 1034 * however later on we may wish to just store 1035 * the ieee for verification. 1036 */ 1037 if ((rxs->r_flags & IEEE80211_R_FREQ) == 0) 1038 return (NULL); 1039 if ((rxs->r_flags & IEEE80211_R_IEEE) == 0) 1040 return (NULL); 1041 1042 /* 1043 * If the rx status contains a valid ieee/freq, then 1044 * ensure we populate the correct channel information 1045 * in rxchan before passing it up to the scan infrastructure. 1046 * Offload NICs will pass up beacons from all channels 1047 * during background scans. 1048 */ 1049 1050 /* Determine a band */ 1051 /* XXX should be done by the driver? */ 1052 if (rxs->c_freq < 3000) { 1053 flags = IEEE80211_CHAN_B; 1054 } else { 1055 flags = IEEE80211_CHAN_A; 1056 } 1057 1058 /* Channel lookup */ 1059 c = ieee80211_find_channel(ic, rxs->c_freq, flags); 1060 1061 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INPUT, 1062 "%s: freq=%d, ieee=%d, flags=0x%08x; c=%p\n", 1063 __func__, 1064 (int) rxs->c_freq, 1065 (int) rxs->c_ieee, 1066 flags, 1067 c); 1068 1069 return (c); 1070} 1071 1072static void 1073addmedia(struct ifmedia *media, int caps, int addsta, int mode, int mword) 1074{ 1075#define ADD(_ic, _s, _o) \ 1076 ifmedia_add(media, \ 1077 IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL) 1078 static const u_int mopts[IEEE80211_MODE_MAX] = { 1079 [IEEE80211_MODE_AUTO] = IFM_AUTO, 1080 [IEEE80211_MODE_11A] = IFM_IEEE80211_11A, 1081 [IEEE80211_MODE_11B] = IFM_IEEE80211_11B, 1082 [IEEE80211_MODE_11G] = IFM_IEEE80211_11G, 1083 [IEEE80211_MODE_FH] = IFM_IEEE80211_FH, 1084 [IEEE80211_MODE_TURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO, 1085 [IEEE80211_MODE_TURBO_G] = IFM_IEEE80211_11G|IFM_IEEE80211_TURBO, 1086 [IEEE80211_MODE_STURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO, 1087 [IEEE80211_MODE_HALF] = IFM_IEEE80211_11A, /* XXX */ 1088 [IEEE80211_MODE_QUARTER] = IFM_IEEE80211_11A, /* XXX */ 1089 [IEEE80211_MODE_11NA] = IFM_IEEE80211_11NA, 1090 [IEEE80211_MODE_11NG] = IFM_IEEE80211_11NG, 1091 }; 1092 u_int mopt; 1093 1094 mopt = mopts[mode]; 1095 if (addsta) 1096 ADD(ic, mword, mopt); /* STA mode has no cap */ 1097 if (caps & IEEE80211_C_IBSS) 1098 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC); 1099 if (caps & IEEE80211_C_HOSTAP) 1100 ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP); 1101 if (caps & IEEE80211_C_AHDEMO) 1102 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0); 1103 if (caps & IEEE80211_C_MONITOR) 1104 ADD(media, mword, mopt | IFM_IEEE80211_MONITOR); 1105 if (caps & IEEE80211_C_WDS) 1106 ADD(media, mword, mopt | IFM_IEEE80211_WDS); 1107 if (caps & IEEE80211_C_MBSS) 1108 ADD(media, mword, mopt | IFM_IEEE80211_MBSS); 1109#undef ADD 1110} 1111 1112/* 1113 * Setup the media data structures according to the channel and 1114 * rate tables. 1115 */ 1116static int 1117ieee80211_media_setup(struct ieee80211com *ic, 1118 struct ifmedia *media, int caps, int addsta, 1119 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) 1120{ 1121 int i, j, rate, maxrate, mword, r; 1122 enum ieee80211_phymode mode; 1123 const struct ieee80211_rateset *rs; 1124 struct ieee80211_rateset allrates; 1125 1126 /* 1127 * Fill in media characteristics. 1128 */ 1129 ifmedia_init(media, 0, media_change, media_stat); 1130 maxrate = 0; 1131 /* 1132 * Add media for legacy operating modes. 1133 */ 1134 memset(&allrates, 0, sizeof(allrates)); 1135 for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) { 1136 if (isclr(ic->ic_modecaps, mode)) 1137 continue; 1138 addmedia(media, caps, addsta, mode, IFM_AUTO); 1139 if (mode == IEEE80211_MODE_AUTO) 1140 continue; 1141 rs = &ic->ic_sup_rates[mode]; 1142 for (i = 0; i < rs->rs_nrates; i++) { 1143 rate = rs->rs_rates[i]; 1144 mword = ieee80211_rate2media(ic, rate, mode); 1145 if (mword == 0) 1146 continue; 1147 addmedia(media, caps, addsta, mode, mword); 1148 /* 1149 * Add legacy rate to the collection of all rates. 1150 */ 1151 r = rate & IEEE80211_RATE_VAL; 1152 for (j = 0; j < allrates.rs_nrates; j++) 1153 if (allrates.rs_rates[j] == r) 1154 break; 1155 if (j == allrates.rs_nrates) { 1156 /* unique, add to the set */ 1157 allrates.rs_rates[j] = r; 1158 allrates.rs_nrates++; 1159 } 1160 rate = (rate & IEEE80211_RATE_VAL) / 2; 1161 if (rate > maxrate) 1162 maxrate = rate; 1163 } 1164 } 1165 for (i = 0; i < allrates.rs_nrates; i++) { 1166 mword = ieee80211_rate2media(ic, allrates.rs_rates[i], 1167 IEEE80211_MODE_AUTO); 1168 if (mword == 0) 1169 continue; 1170 /* NB: remove media options from mword */ 1171 addmedia(media, caps, addsta, 1172 IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword)); 1173 } 1174 /* 1175 * Add HT/11n media. Note that we do not have enough 1176 * bits in the media subtype to express the MCS so we 1177 * use a "placeholder" media subtype and any fixed MCS 1178 * must be specified with a different mechanism. 1179 */ 1180 for (; mode <= IEEE80211_MODE_11NG; mode++) { 1181 if (isclr(ic->ic_modecaps, mode)) 1182 continue; 1183 addmedia(media, caps, addsta, mode, IFM_AUTO); 1184 addmedia(media, caps, addsta, mode, IFM_IEEE80211_MCS); 1185 } 1186 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) || 1187 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) { 1188 addmedia(media, caps, addsta, 1189 IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS); 1190 i = ic->ic_txstream * 8 - 1; 1191 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) && 1192 (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI40)) 1193 rate = ieee80211_htrates[i].ht40_rate_400ns; 1194 else if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40)) 1195 rate = ieee80211_htrates[i].ht40_rate_800ns; 1196 else if ((ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI20)) 1197 rate = ieee80211_htrates[i].ht20_rate_400ns; 1198 else 1199 rate = ieee80211_htrates[i].ht20_rate_800ns; 1200 if (rate > maxrate) 1201 maxrate = rate; 1202 } 1203 return maxrate; 1204} 1205 1206void 1207ieee80211_media_init(struct ieee80211com *ic) 1208{ 1209 struct ifnet *ifp = ic->ic_ifp; 1210 int maxrate; 1211 1212 /* NB: this works because the structure is initialized to zero */ 1213 if (!LIST_EMPTY(&ic->ic_media.ifm_list)) { 1214 /* 1215 * We are re-initializing the channel list; clear 1216 * the existing media state as the media routines 1217 * don't suppress duplicates. 1218 */ 1219 ifmedia_removeall(&ic->ic_media); 1220 } 1221 ieee80211_chan_init(ic); 1222 1223 /* 1224 * Recalculate media settings in case new channel list changes 1225 * the set of available modes. 1226 */ 1227 maxrate = ieee80211_media_setup(ic, &ic->ic_media, ic->ic_caps, 1, 1228 ieee80211com_media_change, ieee80211com_media_status); 1229 /* NB: strip explicit mode; we're actually in autoselect */ 1230 ifmedia_set(&ic->ic_media, 1231 media_status(ic->ic_opmode, ic->ic_curchan) &~ 1232 (IFM_MMASK | IFM_IEEE80211_TURBO)); 1233 if (maxrate) 1234 ifp->if_baudrate = IF_Mbps(maxrate); 1235 1236 /* XXX need to propagate new media settings to vap's */ 1237} 1238 1239/* XXX inline or eliminate? */ 1240const struct ieee80211_rateset * 1241ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c) 1242{ 1243 /* XXX does this work for 11ng basic rates? */ 1244 return &ic->ic_sup_rates[ieee80211_chan2mode(c)]; 1245} 1246 1247void 1248ieee80211_announce(struct ieee80211com *ic) 1249{ 1250 int i, rate, mword; 1251 enum ieee80211_phymode mode; 1252 const struct ieee80211_rateset *rs; 1253 1254 /* NB: skip AUTO since it has no rates */ 1255 for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) { 1256 if (isclr(ic->ic_modecaps, mode)) 1257 continue; 1258 ic_printf(ic, "%s rates: ", ieee80211_phymode_name[mode]); 1259 rs = &ic->ic_sup_rates[mode]; 1260 for (i = 0; i < rs->rs_nrates; i++) { 1261 mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode); 1262 if (mword == 0) 1263 continue; 1264 rate = ieee80211_media2rate(mword); 1265 printf("%s%d%sMbps", (i != 0 ? " " : ""), 1266 rate / 2, ((rate & 0x1) != 0 ? ".5" : "")); 1267 } 1268 printf("\n"); 1269 } 1270 ieee80211_ht_announce(ic); 1271} 1272 1273void 1274ieee80211_announce_channels(struct ieee80211com *ic) 1275{ 1276 const struct ieee80211_channel *c; 1277 char type; 1278 int i, cw; 1279 1280 printf("Chan Freq CW RegPwr MinPwr MaxPwr\n"); 1281 for (i = 0; i < ic->ic_nchans; i++) { 1282 c = &ic->ic_channels[i]; 1283 if (IEEE80211_IS_CHAN_ST(c)) 1284 type = 'S'; 1285 else if (IEEE80211_IS_CHAN_108A(c)) 1286 type = 'T'; 1287 else if (IEEE80211_IS_CHAN_108G(c)) 1288 type = 'G'; 1289 else if (IEEE80211_IS_CHAN_HT(c)) 1290 type = 'n'; 1291 else if (IEEE80211_IS_CHAN_A(c)) 1292 type = 'a'; 1293 else if (IEEE80211_IS_CHAN_ANYG(c)) 1294 type = 'g'; 1295 else if (IEEE80211_IS_CHAN_B(c)) 1296 type = 'b'; 1297 else 1298 type = 'f'; 1299 if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c)) 1300 cw = 40; 1301 else if (IEEE80211_IS_CHAN_HALF(c)) 1302 cw = 10; 1303 else if (IEEE80211_IS_CHAN_QUARTER(c)) 1304 cw = 5; 1305 else 1306 cw = 20; 1307 printf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n" 1308 , c->ic_ieee, c->ic_freq, type 1309 , cw 1310 , IEEE80211_IS_CHAN_HT40U(c) ? '+' : 1311 IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' ' 1312 , c->ic_maxregpower 1313 , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0 1314 , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0 1315 ); 1316 } 1317} 1318 1319static int 1320media2mode(const struct ifmedia_entry *ime, uint32_t flags, uint16_t *mode) 1321{ 1322 switch (IFM_MODE(ime->ifm_media)) { 1323 case IFM_IEEE80211_11A: 1324 *mode = IEEE80211_MODE_11A; 1325 break; 1326 case IFM_IEEE80211_11B: 1327 *mode = IEEE80211_MODE_11B; 1328 break; 1329 case IFM_IEEE80211_11G: 1330 *mode = IEEE80211_MODE_11G; 1331 break; 1332 case IFM_IEEE80211_FH: 1333 *mode = IEEE80211_MODE_FH; 1334 break; 1335 case IFM_IEEE80211_11NA: 1336 *mode = IEEE80211_MODE_11NA; 1337 break; 1338 case IFM_IEEE80211_11NG: 1339 *mode = IEEE80211_MODE_11NG; 1340 break; 1341 case IFM_AUTO: 1342 *mode = IEEE80211_MODE_AUTO; 1343 break; 1344 default: 1345 return 0; 1346 } 1347 /* 1348 * Turbo mode is an ``option''. 1349 * XXX does not apply to AUTO 1350 */ 1351 if (ime->ifm_media & IFM_IEEE80211_TURBO) { 1352 if (*mode == IEEE80211_MODE_11A) { 1353 if (flags & IEEE80211_F_TURBOP) 1354 *mode = IEEE80211_MODE_TURBO_A; 1355 else 1356 *mode = IEEE80211_MODE_STURBO_A; 1357 } else if (*mode == IEEE80211_MODE_11G) 1358 *mode = IEEE80211_MODE_TURBO_G; 1359 else 1360 return 0; 1361 } 1362 /* XXX HT40 +/- */ 1363 return 1; 1364} 1365 1366/* 1367 * Handle a media change request on the underlying interface. 1368 */ 1369int 1370ieee80211com_media_change(struct ifnet *ifp) 1371{ 1372 return EINVAL; 1373} 1374 1375/* 1376 * Handle a media change request on the vap interface. 1377 */ 1378int 1379ieee80211_media_change(struct ifnet *ifp) 1380{ 1381 struct ieee80211vap *vap = ifp->if_softc; 1382 struct ifmedia_entry *ime = vap->iv_media.ifm_cur; 1383 uint16_t newmode; 1384 1385 if (!media2mode(ime, vap->iv_flags, &newmode)) 1386 return EINVAL; 1387 if (vap->iv_des_mode != newmode) { 1388 vap->iv_des_mode = newmode; 1389 /* XXX kick state machine if up+running */ 1390 } 1391 return 0; 1392} 1393 1394/* 1395 * Common code to calculate the media status word 1396 * from the operating mode and channel state. 1397 */ 1398static int 1399media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan) 1400{ 1401 int status; 1402 1403 status = IFM_IEEE80211; 1404 switch (opmode) { 1405 case IEEE80211_M_STA: 1406 break; 1407 case IEEE80211_M_IBSS: 1408 status |= IFM_IEEE80211_ADHOC; 1409 break; 1410 case IEEE80211_M_HOSTAP: 1411 status |= IFM_IEEE80211_HOSTAP; 1412 break; 1413 case IEEE80211_M_MONITOR: 1414 status |= IFM_IEEE80211_MONITOR; 1415 break; 1416 case IEEE80211_M_AHDEMO: 1417 status |= IFM_IEEE80211_ADHOC | IFM_FLAG0; 1418 break; 1419 case IEEE80211_M_WDS: 1420 status |= IFM_IEEE80211_WDS; 1421 break; 1422 case IEEE80211_M_MBSS: 1423 status |= IFM_IEEE80211_MBSS; 1424 break; 1425 } 1426 if (IEEE80211_IS_CHAN_HTA(chan)) { 1427 status |= IFM_IEEE80211_11NA; 1428 } else if (IEEE80211_IS_CHAN_HTG(chan)) { 1429 status |= IFM_IEEE80211_11NG; 1430 } else if (IEEE80211_IS_CHAN_A(chan)) { 1431 status |= IFM_IEEE80211_11A; 1432 } else if (IEEE80211_IS_CHAN_B(chan)) { 1433 status |= IFM_IEEE80211_11B; 1434 } else if (IEEE80211_IS_CHAN_ANYG(chan)) { 1435 status |= IFM_IEEE80211_11G; 1436 } else if (IEEE80211_IS_CHAN_FHSS(chan)) { 1437 status |= IFM_IEEE80211_FH; 1438 } 1439 /* XXX else complain? */ 1440 1441 if (IEEE80211_IS_CHAN_TURBO(chan)) 1442 status |= IFM_IEEE80211_TURBO; 1443#if 0 1444 if (IEEE80211_IS_CHAN_HT20(chan)) 1445 status |= IFM_IEEE80211_HT20; 1446 if (IEEE80211_IS_CHAN_HT40(chan)) 1447 status |= IFM_IEEE80211_HT40; 1448#endif 1449 return status; 1450} 1451 1452static void 1453ieee80211com_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1454{ 1455 struct ieee80211com *ic = ifp->if_l2com; 1456 struct ieee80211vap *vap; 1457 1458 imr->ifm_status = IFM_AVALID; 1459 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1460 if (vap->iv_ifp->if_flags & IFF_UP) { 1461 imr->ifm_status |= IFM_ACTIVE; 1462 break; 1463 } 1464 imr->ifm_active = media_status(ic->ic_opmode, ic->ic_curchan); 1465 if (imr->ifm_status & IFM_ACTIVE) 1466 imr->ifm_current = imr->ifm_active; 1467} 1468 1469void 1470ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1471{ 1472 struct ieee80211vap *vap = ifp->if_softc; 1473 struct ieee80211com *ic = vap->iv_ic; 1474 enum ieee80211_phymode mode; 1475 1476 imr->ifm_status = IFM_AVALID; 1477 /* 1478 * NB: use the current channel's mode to lock down a xmit 1479 * rate only when running; otherwise we may have a mismatch 1480 * in which case the rate will not be convertible. 1481 */ 1482 if (vap->iv_state == IEEE80211_S_RUN || 1483 vap->iv_state == IEEE80211_S_SLEEP) { 1484 imr->ifm_status |= IFM_ACTIVE; 1485 mode = ieee80211_chan2mode(ic->ic_curchan); 1486 } else 1487 mode = IEEE80211_MODE_AUTO; 1488 imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan); 1489 /* 1490 * Calculate a current rate if possible. 1491 */ 1492 if (vap->iv_txparms[mode].ucastrate != IEEE80211_FIXED_RATE_NONE) { 1493 /* 1494 * A fixed rate is set, report that. 1495 */ 1496 imr->ifm_active |= ieee80211_rate2media(ic, 1497 vap->iv_txparms[mode].ucastrate, mode); 1498 } else if (vap->iv_opmode == IEEE80211_M_STA) { 1499 /* 1500 * In station mode report the current transmit rate. 1501 */ 1502 imr->ifm_active |= ieee80211_rate2media(ic, 1503 vap->iv_bss->ni_txrate, mode); 1504 } else 1505 imr->ifm_active |= IFM_AUTO; 1506 if (imr->ifm_status & IFM_ACTIVE) 1507 imr->ifm_current = imr->ifm_active; 1508} 1509 1510/* 1511 * Set the current phy mode and recalculate the active channel 1512 * set based on the available channels for this mode. Also 1513 * select a new default/current channel if the current one is 1514 * inappropriate for this mode. 1515 */ 1516int 1517ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode) 1518{ 1519 /* 1520 * Adjust basic rates in 11b/11g supported rate set. 1521 * Note that if operating on a hal/quarter rate channel 1522 * this is a noop as those rates sets are different 1523 * and used instead. 1524 */ 1525 if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B) 1526 ieee80211_setbasicrates(&ic->ic_sup_rates[mode], mode); 1527 1528 ic->ic_curmode = mode; 1529 ieee80211_reset_erp(ic); /* reset ERP state */ 1530 1531 return 0; 1532} 1533 1534/* 1535 * Return the phy mode for with the specified channel. 1536 */ 1537enum ieee80211_phymode 1538ieee80211_chan2mode(const struct ieee80211_channel *chan) 1539{ 1540 1541 if (IEEE80211_IS_CHAN_HTA(chan)) 1542 return IEEE80211_MODE_11NA; 1543 else if (IEEE80211_IS_CHAN_HTG(chan)) 1544 return IEEE80211_MODE_11NG; 1545 else if (IEEE80211_IS_CHAN_108G(chan)) 1546 return IEEE80211_MODE_TURBO_G; 1547 else if (IEEE80211_IS_CHAN_ST(chan)) 1548 return IEEE80211_MODE_STURBO_A; 1549 else if (IEEE80211_IS_CHAN_TURBO(chan)) 1550 return IEEE80211_MODE_TURBO_A; 1551 else if (IEEE80211_IS_CHAN_HALF(chan)) 1552 return IEEE80211_MODE_HALF; 1553 else if (IEEE80211_IS_CHAN_QUARTER(chan)) 1554 return IEEE80211_MODE_QUARTER; 1555 else if (IEEE80211_IS_CHAN_A(chan)) 1556 return IEEE80211_MODE_11A; 1557 else if (IEEE80211_IS_CHAN_ANYG(chan)) 1558 return IEEE80211_MODE_11G; 1559 else if (IEEE80211_IS_CHAN_B(chan)) 1560 return IEEE80211_MODE_11B; 1561 else if (IEEE80211_IS_CHAN_FHSS(chan)) 1562 return IEEE80211_MODE_FH; 1563 1564 /* NB: should not get here */ 1565 printf("%s: cannot map channel to mode; freq %u flags 0x%x\n", 1566 __func__, chan->ic_freq, chan->ic_flags); 1567 return IEEE80211_MODE_11B; 1568} 1569 1570struct ratemedia { 1571 u_int match; /* rate + mode */ 1572 u_int media; /* if_media rate */ 1573}; 1574 1575static int 1576findmedia(const struct ratemedia rates[], int n, u_int match) 1577{ 1578 int i; 1579 1580 for (i = 0; i < n; i++) 1581 if (rates[i].match == match) 1582 return rates[i].media; 1583 return IFM_AUTO; 1584} 1585 1586/* 1587 * Convert IEEE80211 rate value to ifmedia subtype. 1588 * Rate is either a legacy rate in units of 0.5Mbps 1589 * or an MCS index. 1590 */ 1591int 1592ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode) 1593{ 1594 static const struct ratemedia rates[] = { 1595 { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 }, 1596 { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 }, 1597 { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 }, 1598 { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 }, 1599 { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 }, 1600 { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 }, 1601 { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 }, 1602 { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 }, 1603 { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 }, 1604 { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 }, 1605 { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 }, 1606 { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 }, 1607 { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 }, 1608 { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 }, 1609 { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 }, 1610 { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 }, 1611 { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 }, 1612 { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 }, 1613 { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 }, 1614 { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 }, 1615 { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 }, 1616 { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 }, 1617 { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 }, 1618 { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 }, 1619 { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 }, 1620 { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 }, 1621 { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 }, 1622 { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 }, 1623 { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 }, 1624 { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 }, 1625 /* NB: OFDM72 doesn't realy exist so we don't handle it */ 1626 }; 1627 static const struct ratemedia htrates[] = { 1628 { 0, IFM_IEEE80211_MCS }, 1629 { 1, IFM_IEEE80211_MCS }, 1630 { 2, IFM_IEEE80211_MCS }, 1631 { 3, IFM_IEEE80211_MCS }, 1632 { 4, IFM_IEEE80211_MCS }, 1633 { 5, IFM_IEEE80211_MCS }, 1634 { 6, IFM_IEEE80211_MCS }, 1635 { 7, IFM_IEEE80211_MCS }, 1636 { 8, IFM_IEEE80211_MCS }, 1637 { 9, IFM_IEEE80211_MCS }, 1638 { 10, IFM_IEEE80211_MCS }, 1639 { 11, IFM_IEEE80211_MCS }, 1640 { 12, IFM_IEEE80211_MCS }, 1641 { 13, IFM_IEEE80211_MCS }, 1642 { 14, IFM_IEEE80211_MCS }, 1643 { 15, IFM_IEEE80211_MCS }, 1644 { 16, IFM_IEEE80211_MCS }, 1645 { 17, IFM_IEEE80211_MCS }, 1646 { 18, IFM_IEEE80211_MCS }, 1647 { 19, IFM_IEEE80211_MCS }, 1648 { 20, IFM_IEEE80211_MCS }, 1649 { 21, IFM_IEEE80211_MCS }, 1650 { 22, IFM_IEEE80211_MCS }, 1651 { 23, IFM_IEEE80211_MCS }, 1652 { 24, IFM_IEEE80211_MCS }, 1653 { 25, IFM_IEEE80211_MCS }, 1654 { 26, IFM_IEEE80211_MCS }, 1655 { 27, IFM_IEEE80211_MCS }, 1656 { 28, IFM_IEEE80211_MCS }, 1657 { 29, IFM_IEEE80211_MCS }, 1658 { 30, IFM_IEEE80211_MCS }, 1659 { 31, IFM_IEEE80211_MCS }, 1660 { 32, IFM_IEEE80211_MCS }, 1661 { 33, IFM_IEEE80211_MCS }, 1662 { 34, IFM_IEEE80211_MCS }, 1663 { 35, IFM_IEEE80211_MCS }, 1664 { 36, IFM_IEEE80211_MCS }, 1665 { 37, IFM_IEEE80211_MCS }, 1666 { 38, IFM_IEEE80211_MCS }, 1667 { 39, IFM_IEEE80211_MCS }, 1668 { 40, IFM_IEEE80211_MCS }, 1669 { 41, IFM_IEEE80211_MCS }, 1670 { 42, IFM_IEEE80211_MCS }, 1671 { 43, IFM_IEEE80211_MCS }, 1672 { 44, IFM_IEEE80211_MCS }, 1673 { 45, IFM_IEEE80211_MCS }, 1674 { 46, IFM_IEEE80211_MCS }, 1675 { 47, IFM_IEEE80211_MCS }, 1676 { 48, IFM_IEEE80211_MCS }, 1677 { 49, IFM_IEEE80211_MCS }, 1678 { 50, IFM_IEEE80211_MCS }, 1679 { 51, IFM_IEEE80211_MCS }, 1680 { 52, IFM_IEEE80211_MCS }, 1681 { 53, IFM_IEEE80211_MCS }, 1682 { 54, IFM_IEEE80211_MCS }, 1683 { 55, IFM_IEEE80211_MCS }, 1684 { 56, IFM_IEEE80211_MCS }, 1685 { 57, IFM_IEEE80211_MCS }, 1686 { 58, IFM_IEEE80211_MCS }, 1687 { 59, IFM_IEEE80211_MCS }, 1688 { 60, IFM_IEEE80211_MCS }, 1689 { 61, IFM_IEEE80211_MCS }, 1690 { 62, IFM_IEEE80211_MCS }, 1691 { 63, IFM_IEEE80211_MCS }, 1692 { 64, IFM_IEEE80211_MCS }, 1693 { 65, IFM_IEEE80211_MCS }, 1694 { 66, IFM_IEEE80211_MCS }, 1695 { 67, IFM_IEEE80211_MCS }, 1696 { 68, IFM_IEEE80211_MCS }, 1697 { 69, IFM_IEEE80211_MCS }, 1698 { 70, IFM_IEEE80211_MCS }, 1699 { 71, IFM_IEEE80211_MCS }, 1700 { 72, IFM_IEEE80211_MCS }, 1701 { 73, IFM_IEEE80211_MCS }, 1702 { 74, IFM_IEEE80211_MCS }, 1703 { 75, IFM_IEEE80211_MCS }, 1704 { 76, IFM_IEEE80211_MCS }, 1705 }; 1706 int m; 1707 1708 /* 1709 * Check 11n rates first for match as an MCS. 1710 */ 1711 if (mode == IEEE80211_MODE_11NA) { 1712 if (rate & IEEE80211_RATE_MCS) { 1713 rate &= ~IEEE80211_RATE_MCS; 1714 m = findmedia(htrates, nitems(htrates), rate); 1715 if (m != IFM_AUTO) 1716 return m | IFM_IEEE80211_11NA; 1717 } 1718 } else if (mode == IEEE80211_MODE_11NG) { 1719 /* NB: 12 is ambiguous, it will be treated as an MCS */ 1720 if (rate & IEEE80211_RATE_MCS) { 1721 rate &= ~IEEE80211_RATE_MCS; 1722 m = findmedia(htrates, nitems(htrates), rate); 1723 if (m != IFM_AUTO) 1724 return m | IFM_IEEE80211_11NG; 1725 } 1726 } 1727 rate &= IEEE80211_RATE_VAL; 1728 switch (mode) { 1729 case IEEE80211_MODE_11A: 1730 case IEEE80211_MODE_HALF: /* XXX good 'nuf */ 1731 case IEEE80211_MODE_QUARTER: 1732 case IEEE80211_MODE_11NA: 1733 case IEEE80211_MODE_TURBO_A: 1734 case IEEE80211_MODE_STURBO_A: 1735 return findmedia(rates, nitems(rates), 1736 rate | IFM_IEEE80211_11A); 1737 case IEEE80211_MODE_11B: 1738 return findmedia(rates, nitems(rates), 1739 rate | IFM_IEEE80211_11B); 1740 case IEEE80211_MODE_FH: 1741 return findmedia(rates, nitems(rates), 1742 rate | IFM_IEEE80211_FH); 1743 case IEEE80211_MODE_AUTO: 1744 /* NB: ic may be NULL for some drivers */ 1745 if (ic != NULL && ic->ic_phytype == IEEE80211_T_FH) 1746 return findmedia(rates, nitems(rates), 1747 rate | IFM_IEEE80211_FH); 1748 /* NB: hack, 11g matches both 11b+11a rates */ 1749 /* fall thru... */ 1750 case IEEE80211_MODE_11G: 1751 case IEEE80211_MODE_11NG: 1752 case IEEE80211_MODE_TURBO_G: 1753 return findmedia(rates, nitems(rates), rate | IFM_IEEE80211_11G); 1754 } 1755 return IFM_AUTO; 1756} 1757 1758int 1759ieee80211_media2rate(int mword) 1760{ 1761 static const int ieeerates[] = { 1762 -1, /* IFM_AUTO */ 1763 0, /* IFM_MANUAL */ 1764 0, /* IFM_NONE */ 1765 2, /* IFM_IEEE80211_FH1 */ 1766 4, /* IFM_IEEE80211_FH2 */ 1767 2, /* IFM_IEEE80211_DS1 */ 1768 4, /* IFM_IEEE80211_DS2 */ 1769 11, /* IFM_IEEE80211_DS5 */ 1770 22, /* IFM_IEEE80211_DS11 */ 1771 44, /* IFM_IEEE80211_DS22 */ 1772 12, /* IFM_IEEE80211_OFDM6 */ 1773 18, /* IFM_IEEE80211_OFDM9 */ 1774 24, /* IFM_IEEE80211_OFDM12 */ 1775 36, /* IFM_IEEE80211_OFDM18 */ 1776 48, /* IFM_IEEE80211_OFDM24 */ 1777 72, /* IFM_IEEE80211_OFDM36 */ 1778 96, /* IFM_IEEE80211_OFDM48 */ 1779 108, /* IFM_IEEE80211_OFDM54 */ 1780 144, /* IFM_IEEE80211_OFDM72 */ 1781 0, /* IFM_IEEE80211_DS354k */ 1782 0, /* IFM_IEEE80211_DS512k */ 1783 6, /* IFM_IEEE80211_OFDM3 */ 1784 9, /* IFM_IEEE80211_OFDM4 */ 1785 54, /* IFM_IEEE80211_OFDM27 */ 1786 -1, /* IFM_IEEE80211_MCS */ 1787 }; 1788 return IFM_SUBTYPE(mword) < nitems(ieeerates) ? 1789 ieeerates[IFM_SUBTYPE(mword)] : 0; 1790} 1791 1792/* 1793 * The following hash function is adapted from "Hash Functions" by Bob Jenkins 1794 * ("Algorithm Alley", Dr. Dobbs Journal, September 1997). 1795 */ 1796#define mix(a, b, c) \ 1797do { \ 1798 a -= b; a -= c; a ^= (c >> 13); \ 1799 b -= c; b -= a; b ^= (a << 8); \ 1800 c -= a; c -= b; c ^= (b >> 13); \ 1801 a -= b; a -= c; a ^= (c >> 12); \ 1802 b -= c; b -= a; b ^= (a << 16); \ 1803 c -= a; c -= b; c ^= (b >> 5); \ 1804 a -= b; a -= c; a ^= (c >> 3); \ 1805 b -= c; b -= a; b ^= (a << 10); \ 1806 c -= a; c -= b; c ^= (b >> 15); \ 1807} while (/*CONSTCOND*/0) 1808 1809uint32_t 1810ieee80211_mac_hash(const struct ieee80211com *ic, 1811 const uint8_t addr[IEEE80211_ADDR_LEN]) 1812{ 1813 uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = ic->ic_hash_key; 1814 1815 b += addr[5] << 8; 1816 b += addr[4]; 1817 a += addr[3] << 24; 1818 a += addr[2] << 16; 1819 a += addr[1] << 8; 1820 a += addr[0]; 1821 1822 mix(a, b, c); 1823 1824 return c; 1825} 1826#undef mix 1827 1828char 1829ieee80211_channel_type_char(const struct ieee80211_channel *c) 1830{ 1831 if (IEEE80211_IS_CHAN_ST(c)) 1832 return 'S'; 1833 if (IEEE80211_IS_CHAN_108A(c)) 1834 return 'T'; 1835 if (IEEE80211_IS_CHAN_108G(c)) 1836 return 'G'; 1837 if (IEEE80211_IS_CHAN_HT(c)) 1838 return 'n'; 1839 if (IEEE80211_IS_CHAN_A(c)) 1840 return 'a'; 1841 if (IEEE80211_IS_CHAN_ANYG(c)) 1842 return 'g'; 1843 if (IEEE80211_IS_CHAN_B(c)) 1844 return 'b'; 1845 return 'f'; 1846} 1847