ieee80211.c revision 283535
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 283535 2015-05-25 16:37:41Z adrian $"); 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 85static const 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 ifnet *ifp) 228{ 229 if_printf(ifp, "need multicast update callback\n"); 230} 231 232static void 233null_update_promisc(struct ifnet *ifp) 234{ 235 if_printf(ifp, "need promiscuous mode update callback\n"); 236} 237 238static int 239null_transmit(struct ifnet *ifp, struct mbuf *m) 240{ 241 m_freem(m); 242 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 243 return EACCES; /* XXX EIO/EPERM? */ 244} 245 246#if __FreeBSD_version >= 1000031 247static int 248null_output(struct ifnet *ifp, struct mbuf *m, 249 const struct sockaddr *dst, struct route *ro) 250#else 251static int 252null_output(struct ifnet *ifp, struct mbuf *m, 253 struct sockaddr *dst, struct route *ro) 254#endif 255{ 256 if_printf(ifp, "discard raw packet\n"); 257 return null_transmit(ifp, m); 258} 259 260static void 261null_input(struct ifnet *ifp, struct mbuf *m) 262{ 263 if_printf(ifp, "if_input should not be called\n"); 264 m_freem(m); 265} 266 267static void 268null_update_chw(struct ieee80211com *ic) 269{ 270 271 ic_printf(ic, "%s: need callback\n", __func__); 272} 273 274int 275ic_printf(struct ieee80211com *ic, const char * fmt, ...) 276{ 277 va_list ap; 278 int retval; 279 280 retval = printf("%s: ", ic->ic_name); 281 va_start(ap, fmt); 282 retval += vprintf(fmt, ap); 283 va_end(ap); 284 return (retval); 285} 286 287/* 288 * Attach/setup the common net80211 state. Called by 289 * the driver on attach to prior to creating any vap's. 290 */ 291void 292ieee80211_ifattach(struct ieee80211com *ic, 293 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 294{ 295 struct ifnet *ifp = ic->ic_ifp; 296 struct sockaddr_dl *sdl; 297 struct ifaddr *ifa; 298 299 KASSERT(ifp->if_type == IFT_IEEE80211, ("if_type %d", ifp->if_type)); 300 301 IEEE80211_LOCK_INIT(ic, ic->ic_name); 302 IEEE80211_TX_LOCK_INIT(ic, ic->ic_name); 303 TAILQ_INIT(&ic->ic_vaps); 304 305 /* Create a taskqueue for all state changes */ 306 ic->ic_tq = taskqueue_create("ic_taskq", M_WAITOK | M_ZERO, 307 taskqueue_thread_enqueue, &ic->ic_tq); 308 taskqueue_start_threads(&ic->ic_tq, 1, PI_NET, "%s net80211 taskq", 309 ifp->if_xname); 310 /* 311 * Fill in 802.11 available channel set, mark all 312 * available channels as active, and pick a default 313 * channel if not already specified. 314 */ 315 ieee80211_media_init(ic); 316 317 ic->ic_update_mcast = null_update_mcast; 318 ic->ic_update_promisc = null_update_promisc; 319 ic->ic_update_chw = null_update_chw; 320 321 ic->ic_hash_key = arc4random(); 322 ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT; 323 ic->ic_lintval = ic->ic_bintval; 324 ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX; 325 326 ieee80211_crypto_attach(ic); 327 ieee80211_node_attach(ic); 328 ieee80211_power_attach(ic); 329 ieee80211_proto_attach(ic); 330#ifdef IEEE80211_SUPPORT_SUPERG 331 ieee80211_superg_attach(ic); 332#endif 333 ieee80211_ht_attach(ic); 334 ieee80211_scan_attach(ic); 335 ieee80211_regdomain_attach(ic); 336 ieee80211_dfs_attach(ic); 337 338 ieee80211_sysctl_attach(ic); 339 340 ifp->if_addrlen = IEEE80211_ADDR_LEN; 341 ifp->if_hdrlen = 0; 342 343 CURVNET_SET(vnet0); 344 345 if_attach(ifp); 346 347 ifp->if_mtu = IEEE80211_MTU_MAX; 348 ifp->if_broadcastaddr = ieee80211broadcastaddr; 349 ifp->if_output = null_output; 350 ifp->if_input = null_input; /* just in case */ 351 ifp->if_resolvemulti = NULL; /* NB: callers check */ 352 353 ifa = ifaddr_byindex(ifp->if_index); 354 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); 355 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 356 sdl->sdl_type = IFT_ETHER; /* XXX IFT_IEEE80211? */ 357 sdl->sdl_alen = IEEE80211_ADDR_LEN; 358 IEEE80211_ADDR_COPY(LLADDR(sdl), macaddr); 359 ifa_free(ifa); 360 361 CURVNET_RESTORE(); 362} 363 364/* 365 * Detach net80211 state on device detach. Tear down 366 * all vap's and reclaim all common state prior to the 367 * device state going away. Note we may call back into 368 * driver; it must be prepared for this. 369 */ 370void 371ieee80211_ifdetach(struct ieee80211com *ic) 372{ 373 struct ifnet *ifp = ic->ic_ifp; 374 struct ieee80211vap *vap; 375 376 /* 377 * This detaches the main interface, but not the vaps. 378 * Each VAP may be in a separate VIMAGE. 379 */ 380 CURVNET_SET(ifp->if_vnet); 381 if_detach(ifp); 382 CURVNET_RESTORE(); 383 384 /* 385 * The VAP is responsible for setting and clearing 386 * the VIMAGE context. 387 */ 388 while ((vap = TAILQ_FIRST(&ic->ic_vaps)) != NULL) 389 ieee80211_vap_destroy(vap); 390 ieee80211_waitfor_parent(ic); 391 392 ieee80211_sysctl_detach(ic); 393 ieee80211_dfs_detach(ic); 394 ieee80211_regdomain_detach(ic); 395 ieee80211_scan_detach(ic); 396#ifdef IEEE80211_SUPPORT_SUPERG 397 ieee80211_superg_detach(ic); 398#endif 399 ieee80211_ht_detach(ic); 400 /* NB: must be called before ieee80211_node_detach */ 401 ieee80211_proto_detach(ic); 402 ieee80211_crypto_detach(ic); 403 ieee80211_power_detach(ic); 404 ieee80211_node_detach(ic); 405 406 /* XXX VNET needed? */ 407 ifmedia_removeall(&ic->ic_media); 408 409 taskqueue_free(ic->ic_tq); 410 IEEE80211_TX_LOCK_DESTROY(ic); 411 IEEE80211_LOCK_DESTROY(ic); 412} 413 414/* 415 * Default reset method for use with the ioctl support. This 416 * method is invoked after any state change in the 802.11 417 * layer that should be propagated to the hardware but not 418 * require re-initialization of the 802.11 state machine (e.g 419 * rescanning for an ap). We always return ENETRESET which 420 * should cause the driver to re-initialize the device. Drivers 421 * can override this method to implement more optimized support. 422 */ 423static int 424default_reset(struct ieee80211vap *vap, u_long cmd) 425{ 426 return ENETRESET; 427} 428 429/* 430 * Prepare a vap for use. Drivers use this call to 431 * setup net80211 state in new vap's prior attaching 432 * them with ieee80211_vap_attach (below). 433 */ 434int 435ieee80211_vap_setup(struct ieee80211com *ic, struct ieee80211vap *vap, 436 const char name[IFNAMSIZ], int unit, enum ieee80211_opmode opmode, 437 int flags, const uint8_t bssid[IEEE80211_ADDR_LEN], 438 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 439{ 440 struct ifnet *ifp; 441 442 ifp = if_alloc(IFT_ETHER); 443 if (ifp == NULL) { 444 ic_printf(ic, "%s: unable to allocate ifnet\n", 445 __func__); 446 return ENOMEM; 447 } 448 if_initname(ifp, name, unit); 449 ifp->if_softc = vap; /* back pointer */ 450 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 451 ifp->if_transmit = ieee80211_vap_transmit; 452 ifp->if_qflush = ieee80211_vap_qflush; 453 ifp->if_ioctl = ieee80211_ioctl; 454 ifp->if_init = ieee80211_init; 455 456 vap->iv_ifp = ifp; 457 vap->iv_ic = ic; 458 vap->iv_flags = ic->ic_flags; /* propagate common flags */ 459 vap->iv_flags_ext = ic->ic_flags_ext; 460 vap->iv_flags_ven = ic->ic_flags_ven; 461 vap->iv_caps = ic->ic_caps &~ IEEE80211_C_OPMODE; 462 vap->iv_htcaps = ic->ic_htcaps; 463 vap->iv_htextcaps = ic->ic_htextcaps; 464 vap->iv_opmode = opmode; 465 vap->iv_caps |= ieee80211_opcap[opmode]; 466 switch (opmode) { 467 case IEEE80211_M_WDS: 468 /* 469 * WDS links must specify the bssid of the far end. 470 * For legacy operation this is a static relationship. 471 * For non-legacy operation the station must associate 472 * and be authorized to pass traffic. Plumbing the 473 * vap to the proper node happens when the vap 474 * transitions to RUN state. 475 */ 476 IEEE80211_ADDR_COPY(vap->iv_des_bssid, bssid); 477 vap->iv_flags |= IEEE80211_F_DESBSSID; 478 if (flags & IEEE80211_CLONE_WDSLEGACY) 479 vap->iv_flags_ext |= IEEE80211_FEXT_WDSLEGACY; 480 break; 481#ifdef IEEE80211_SUPPORT_TDMA 482 case IEEE80211_M_AHDEMO: 483 if (flags & IEEE80211_CLONE_TDMA) { 484 /* NB: checked before clone operation allowed */ 485 KASSERT(ic->ic_caps & IEEE80211_C_TDMA, 486 ("not TDMA capable, ic_caps 0x%x", ic->ic_caps)); 487 /* 488 * Propagate TDMA capability to mark vap; this 489 * cannot be removed and is used to distinguish 490 * regular ahdemo operation from ahdemo+tdma. 491 */ 492 vap->iv_caps |= IEEE80211_C_TDMA; 493 } 494 break; 495#endif 496 default: 497 break; 498 } 499 /* auto-enable s/w beacon miss support */ 500 if (flags & IEEE80211_CLONE_NOBEACONS) 501 vap->iv_flags_ext |= IEEE80211_FEXT_SWBMISS; 502 /* auto-generated or user supplied MAC address */ 503 if (flags & (IEEE80211_CLONE_BSSID|IEEE80211_CLONE_MACADDR)) 504 vap->iv_flags_ext |= IEEE80211_FEXT_UNIQMAC; 505 /* 506 * Enable various functionality by default if we're 507 * capable; the driver can override us if it knows better. 508 */ 509 if (vap->iv_caps & IEEE80211_C_WME) 510 vap->iv_flags |= IEEE80211_F_WME; 511 if (vap->iv_caps & IEEE80211_C_BURST) 512 vap->iv_flags |= IEEE80211_F_BURST; 513 /* NB: bg scanning only makes sense for station mode right now */ 514 if (vap->iv_opmode == IEEE80211_M_STA && 515 (vap->iv_caps & IEEE80211_C_BGSCAN)) 516 vap->iv_flags |= IEEE80211_F_BGSCAN; 517 vap->iv_flags |= IEEE80211_F_DOTH; /* XXX no cap, just ena */ 518 /* NB: DFS support only makes sense for ap mode right now */ 519 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 520 (vap->iv_caps & IEEE80211_C_DFS)) 521 vap->iv_flags_ext |= IEEE80211_FEXT_DFS; 522 523 vap->iv_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */ 524 vap->iv_bmissthreshold = IEEE80211_HWBMISS_DEFAULT; 525 vap->iv_dtim_period = IEEE80211_DTIM_DEFAULT; 526 /* 527 * Install a default reset method for the ioctl support; 528 * the driver can override this. 529 */ 530 vap->iv_reset = default_reset; 531 532 IEEE80211_ADDR_COPY(vap->iv_myaddr, macaddr); 533 534 ieee80211_sysctl_vattach(vap); 535 ieee80211_crypto_vattach(vap); 536 ieee80211_node_vattach(vap); 537 ieee80211_power_vattach(vap); 538 ieee80211_proto_vattach(vap); 539#ifdef IEEE80211_SUPPORT_SUPERG 540 ieee80211_superg_vattach(vap); 541#endif 542 ieee80211_ht_vattach(vap); 543 ieee80211_scan_vattach(vap); 544 ieee80211_regdomain_vattach(vap); 545 ieee80211_radiotap_vattach(vap); 546 ieee80211_ratectl_set(vap, IEEE80211_RATECTL_NONE); 547 548 return 0; 549} 550 551/* 552 * Activate a vap. State should have been prepared with a 553 * call to ieee80211_vap_setup and by the driver. On return 554 * from this call the vap is ready for use. 555 */ 556int 557ieee80211_vap_attach(struct ieee80211vap *vap, 558 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) 559{ 560 struct ifnet *ifp = vap->iv_ifp; 561 struct ieee80211com *ic = vap->iv_ic; 562 struct ifmediareq imr; 563 int maxrate; 564 565 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 566 "%s: %s parent %s flags 0x%x flags_ext 0x%x\n", 567 __func__, ieee80211_opmode_name[vap->iv_opmode], 568 ic->ic_name, vap->iv_flags, vap->iv_flags_ext); 569 570 /* 571 * Do late attach work that cannot happen until after 572 * the driver has had a chance to override defaults. 573 */ 574 ieee80211_node_latevattach(vap); 575 ieee80211_power_latevattach(vap); 576 577 maxrate = ieee80211_media_setup(ic, &vap->iv_media, vap->iv_caps, 578 vap->iv_opmode == IEEE80211_M_STA, media_change, media_stat); 579 ieee80211_media_status(ifp, &imr); 580 /* NB: strip explicit mode; we're actually in autoselect */ 581 ifmedia_set(&vap->iv_media, 582 imr.ifm_active &~ (IFM_MMASK | IFM_IEEE80211_TURBO)); 583 if (maxrate) 584 ifp->if_baudrate = IF_Mbps(maxrate); 585 586 ether_ifattach(ifp, vap->iv_myaddr); 587 /* hook output method setup by ether_ifattach */ 588 vap->iv_output = ifp->if_output; 589 ifp->if_output = ieee80211_output; 590 /* NB: if_mtu set by ether_ifattach to ETHERMTU */ 591 592 IEEE80211_LOCK(ic); 593 TAILQ_INSERT_TAIL(&ic->ic_vaps, vap, iv_next); 594 ieee80211_syncflag_locked(ic, IEEE80211_F_WME); 595#ifdef IEEE80211_SUPPORT_SUPERG 596 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); 597#endif 598 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); 599 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); 600 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT); 601 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40); 602 ieee80211_syncifflag_locked(ic, IFF_PROMISC); 603 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI); 604 IEEE80211_UNLOCK(ic); 605 606 return 1; 607} 608 609/* 610 * Tear down vap state and reclaim the ifnet. 611 * The driver is assumed to have prepared for 612 * this; e.g. by turning off interrupts for the 613 * underlying device. 614 */ 615void 616ieee80211_vap_detach(struct ieee80211vap *vap) 617{ 618 struct ieee80211com *ic = vap->iv_ic; 619 struct ifnet *ifp = vap->iv_ifp; 620 621 CURVNET_SET(ifp->if_vnet); 622 623 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s parent %s\n", 624 __func__, ieee80211_opmode_name[vap->iv_opmode], 625 ic->ic_name); 626 627 /* NB: bpfdetach is called by ether_ifdetach and claims all taps */ 628 ether_ifdetach(ifp); 629 630 ieee80211_stop(vap); 631 632 /* 633 * Flush any deferred vap tasks. 634 */ 635 ieee80211_draintask(ic, &vap->iv_nstate_task); 636 ieee80211_draintask(ic, &vap->iv_swbmiss_task); 637 638 /* XXX band-aid until ifnet handles this for us */ 639 taskqueue_drain(taskqueue_swi, &ifp->if_linktask); 640 641 IEEE80211_LOCK(ic); 642 KASSERT(vap->iv_state == IEEE80211_S_INIT , ("vap still running")); 643 TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next); 644 ieee80211_syncflag_locked(ic, IEEE80211_F_WME); 645#ifdef IEEE80211_SUPPORT_SUPERG 646 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); 647#endif 648 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); 649 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); 650 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT); 651 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40); 652 /* NB: this handles the bpfdetach done below */ 653 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_BPF); 654 ieee80211_syncifflag_locked(ic, IFF_PROMISC); 655 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI); 656 IEEE80211_UNLOCK(ic); 657 658 ifmedia_removeall(&vap->iv_media); 659 660 ieee80211_radiotap_vdetach(vap); 661 ieee80211_regdomain_vdetach(vap); 662 ieee80211_scan_vdetach(vap); 663#ifdef IEEE80211_SUPPORT_SUPERG 664 ieee80211_superg_vdetach(vap); 665#endif 666 ieee80211_ht_vdetach(vap); 667 /* NB: must be before ieee80211_node_vdetach */ 668 ieee80211_proto_vdetach(vap); 669 ieee80211_crypto_vdetach(vap); 670 ieee80211_power_vdetach(vap); 671 ieee80211_node_vdetach(vap); 672 ieee80211_sysctl_vdetach(vap); 673 674 if_free(ifp); 675 676 CURVNET_RESTORE(); 677} 678 679/* 680 * Synchronize flag bit state in the parent ifnet structure 681 * according to the state of all vap ifnet's. This is used, 682 * for example, to handle IFF_PROMISC and IFF_ALLMULTI. 683 */ 684void 685ieee80211_syncifflag_locked(struct ieee80211com *ic, int flag) 686{ 687 struct ifnet *ifp = ic->ic_ifp; 688 struct ieee80211vap *vap; 689 int bit, oflags; 690 691 IEEE80211_LOCK_ASSERT(ic); 692 693 bit = 0; 694 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 695 if (vap->iv_ifp->if_flags & flag) { 696 /* 697 * XXX the bridge sets PROMISC but we don't want to 698 * enable it on the device, discard here so all the 699 * drivers don't need to special-case it 700 */ 701 if (flag == IFF_PROMISC && 702 !(vap->iv_opmode == IEEE80211_M_MONITOR || 703 (vap->iv_opmode == IEEE80211_M_AHDEMO && 704 (vap->iv_caps & IEEE80211_C_TDMA) == 0))) 705 continue; 706 bit = 1; 707 break; 708 } 709 oflags = ifp->if_flags; 710 if (bit) 711 ifp->if_flags |= flag; 712 else 713 ifp->if_flags &= ~flag; 714 if ((ifp->if_flags ^ oflags) & flag) { 715 /* XXX should we return 1/0 and let caller do this? */ 716 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 717 if (flag == IFF_PROMISC) 718 ieee80211_runtask(ic, &ic->ic_promisc_task); 719 else if (flag == IFF_ALLMULTI) 720 ieee80211_runtask(ic, &ic->ic_mcast_task); 721 } 722 } 723} 724 725/* 726 * Synchronize flag bit state in the com structure 727 * according to the state of all vap's. This is used, 728 * for example, to handle state changes via ioctls. 729 */ 730static void 731ieee80211_syncflag_locked(struct ieee80211com *ic, int flag) 732{ 733 struct ieee80211vap *vap; 734 int bit; 735 736 IEEE80211_LOCK_ASSERT(ic); 737 738 bit = 0; 739 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 740 if (vap->iv_flags & flag) { 741 bit = 1; 742 break; 743 } 744 if (bit) 745 ic->ic_flags |= flag; 746 else 747 ic->ic_flags &= ~flag; 748} 749 750void 751ieee80211_syncflag(struct ieee80211vap *vap, int flag) 752{ 753 struct ieee80211com *ic = vap->iv_ic; 754 755 IEEE80211_LOCK(ic); 756 if (flag < 0) { 757 flag = -flag; 758 vap->iv_flags &= ~flag; 759 } else 760 vap->iv_flags |= flag; 761 ieee80211_syncflag_locked(ic, flag); 762 IEEE80211_UNLOCK(ic); 763} 764 765/* 766 * Synchronize flags_ht bit state in the com structure 767 * according to the state of all vap's. This is used, 768 * for example, to handle state changes via ioctls. 769 */ 770static void 771ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag) 772{ 773 struct ieee80211vap *vap; 774 int bit; 775 776 IEEE80211_LOCK_ASSERT(ic); 777 778 bit = 0; 779 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 780 if (vap->iv_flags_ht & flag) { 781 bit = 1; 782 break; 783 } 784 if (bit) 785 ic->ic_flags_ht |= flag; 786 else 787 ic->ic_flags_ht &= ~flag; 788} 789 790void 791ieee80211_syncflag_ht(struct ieee80211vap *vap, int flag) 792{ 793 struct ieee80211com *ic = vap->iv_ic; 794 795 IEEE80211_LOCK(ic); 796 if (flag < 0) { 797 flag = -flag; 798 vap->iv_flags_ht &= ~flag; 799 } else 800 vap->iv_flags_ht |= flag; 801 ieee80211_syncflag_ht_locked(ic, flag); 802 IEEE80211_UNLOCK(ic); 803} 804 805/* 806 * Synchronize flags_ext bit state in the com structure 807 * according to the state of all vap's. This is used, 808 * for example, to handle state changes via ioctls. 809 */ 810static void 811ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag) 812{ 813 struct ieee80211vap *vap; 814 int bit; 815 816 IEEE80211_LOCK_ASSERT(ic); 817 818 bit = 0; 819 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 820 if (vap->iv_flags_ext & flag) { 821 bit = 1; 822 break; 823 } 824 if (bit) 825 ic->ic_flags_ext |= flag; 826 else 827 ic->ic_flags_ext &= ~flag; 828} 829 830void 831ieee80211_syncflag_ext(struct ieee80211vap *vap, int flag) 832{ 833 struct ieee80211com *ic = vap->iv_ic; 834 835 IEEE80211_LOCK(ic); 836 if (flag < 0) { 837 flag = -flag; 838 vap->iv_flags_ext &= ~flag; 839 } else 840 vap->iv_flags_ext |= flag; 841 ieee80211_syncflag_ext_locked(ic, flag); 842 IEEE80211_UNLOCK(ic); 843} 844 845static __inline int 846mapgsm(u_int freq, u_int flags) 847{ 848 freq *= 10; 849 if (flags & IEEE80211_CHAN_QUARTER) 850 freq += 5; 851 else if (flags & IEEE80211_CHAN_HALF) 852 freq += 10; 853 else 854 freq += 20; 855 /* NB: there is no 907/20 wide but leave room */ 856 return (freq - 906*10) / 5; 857} 858 859static __inline int 860mappsb(u_int freq, u_int flags) 861{ 862 return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5; 863} 864 865/* 866 * Convert MHz frequency to IEEE channel number. 867 */ 868int 869ieee80211_mhz2ieee(u_int freq, u_int flags) 870{ 871#define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990) 872 if (flags & IEEE80211_CHAN_GSM) 873 return mapgsm(freq, flags); 874 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 875 if (freq == 2484) 876 return 14; 877 if (freq < 2484) 878 return ((int) freq - 2407) / 5; 879 else 880 return 15 + ((freq - 2512) / 20); 881 } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */ 882 if (freq <= 5000) { 883 /* XXX check regdomain? */ 884 if (IS_FREQ_IN_PSB(freq)) 885 return mappsb(freq, flags); 886 return (freq - 4000) / 5; 887 } else 888 return (freq - 5000) / 5; 889 } else { /* either, guess */ 890 if (freq == 2484) 891 return 14; 892 if (freq < 2484) { 893 if (907 <= freq && freq <= 922) 894 return mapgsm(freq, flags); 895 return ((int) freq - 2407) / 5; 896 } 897 if (freq < 5000) { 898 if (IS_FREQ_IN_PSB(freq)) 899 return mappsb(freq, flags); 900 else if (freq > 4900) 901 return (freq - 4000) / 5; 902 else 903 return 15 + ((freq - 2512) / 20); 904 } 905 return (freq - 5000) / 5; 906 } 907#undef IS_FREQ_IN_PSB 908} 909 910/* 911 * Convert channel to IEEE channel number. 912 */ 913int 914ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c) 915{ 916 if (c == NULL) { 917 ic_printf(ic, "invalid channel (NULL)\n"); 918 return 0; /* XXX */ 919 } 920 return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee); 921} 922 923/* 924 * Convert IEEE channel number to MHz frequency. 925 */ 926u_int 927ieee80211_ieee2mhz(u_int chan, u_int flags) 928{ 929 if (flags & IEEE80211_CHAN_GSM) 930 return 907 + 5 * (chan / 10); 931 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 932 if (chan == 14) 933 return 2484; 934 if (chan < 14) 935 return 2407 + chan*5; 936 else 937 return 2512 + ((chan-15)*20); 938 } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */ 939 if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) { 940 chan -= 37; 941 return 4940 + chan*5 + (chan % 5 ? 2 : 0); 942 } 943 return 5000 + (chan*5); 944 } else { /* either, guess */ 945 /* XXX can't distinguish PSB+GSM channels */ 946 if (chan == 14) 947 return 2484; 948 if (chan < 14) /* 0-13 */ 949 return 2407 + chan*5; 950 if (chan < 27) /* 15-26 */ 951 return 2512 + ((chan-15)*20); 952 return 5000 + (chan*5); 953 } 954} 955 956/* 957 * Locate a channel given a frequency+flags. We cache 958 * the previous lookup to optimize switching between two 959 * channels--as happens with dynamic turbo. 960 */ 961struct ieee80211_channel * 962ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags) 963{ 964 struct ieee80211_channel *c; 965 int i; 966 967 flags &= IEEE80211_CHAN_ALLTURBO; 968 c = ic->ic_prevchan; 969 if (c != NULL && c->ic_freq == freq && 970 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 971 return c; 972 /* brute force search */ 973 for (i = 0; i < ic->ic_nchans; i++) { 974 c = &ic->ic_channels[i]; 975 if (c->ic_freq == freq && 976 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 977 return c; 978 } 979 return NULL; 980} 981 982/* 983 * Locate a channel given a channel number+flags. We cache 984 * the previous lookup to optimize switching between two 985 * channels--as happens with dynamic turbo. 986 */ 987struct ieee80211_channel * 988ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags) 989{ 990 struct ieee80211_channel *c; 991 int i; 992 993 flags &= IEEE80211_CHAN_ALLTURBO; 994 c = ic->ic_prevchan; 995 if (c != NULL && c->ic_ieee == ieee && 996 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 997 return c; 998 /* brute force search */ 999 for (i = 0; i < ic->ic_nchans; i++) { 1000 c = &ic->ic_channels[i]; 1001 if (c->ic_ieee == ieee && 1002 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 1003 return c; 1004 } 1005 return NULL; 1006} 1007 1008/* 1009 * Lookup a channel suitable for the given rx status. 1010 * 1011 * This is used to find a channel for a frame (eg beacon, probe 1012 * response) based purely on the received PHY information. 1013 * 1014 * For now it tries to do it based on R_FREQ / R_IEEE. 1015 * This is enough for 11bg and 11a (and thus 11ng/11na) 1016 * but it will not be enough for GSM, PSB channels and the 1017 * like. It also doesn't know about legacy-turbog and 1018 * legacy-turbo modes, which some offload NICs actually 1019 * support in weird ways. 1020 * 1021 * Takes the ic and rxstatus; returns the channel or NULL 1022 * if not found. 1023 * 1024 * XXX TODO: Add support for that when the need arises. 1025 */ 1026struct ieee80211_channel * 1027ieee80211_lookup_channel_rxstatus(struct ieee80211vap *vap, 1028 const struct ieee80211_rx_stats *rxs) 1029{ 1030 struct ieee80211com *ic = vap->iv_ic; 1031 uint32_t flags; 1032 struct ieee80211_channel *c; 1033 1034 if (rxs == NULL) 1035 return (NULL); 1036 1037 /* 1038 * Strictly speaking we only use freq for now, 1039 * however later on we may wish to just store 1040 * the ieee for verification. 1041 */ 1042 if ((rxs->r_flags & IEEE80211_R_FREQ) == 0) 1043 return (NULL); 1044 if ((rxs->r_flags & IEEE80211_R_IEEE) == 0) 1045 return (NULL); 1046 1047 /* 1048 * If the rx status contains a valid ieee/freq, then 1049 * ensure we populate the correct channel information 1050 * in rxchan before passing it up to the scan infrastructure. 1051 * Offload NICs will pass up beacons from all channels 1052 * during background scans. 1053 */ 1054 1055 /* Determine a band */ 1056 /* XXX should be done by the driver? */ 1057 if (rxs->c_freq < 3000) { 1058 flags = IEEE80211_CHAN_B; 1059 } else { 1060 flags = IEEE80211_CHAN_A; 1061 } 1062 1063 /* Channel lookup */ 1064 c = ieee80211_find_channel(ic, rxs->c_freq, flags); 1065 1066 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INPUT, 1067 "%s: freq=%d, ieee=%d, flags=0x%08x; c=%p\n", 1068 __func__, 1069 (int) rxs->c_freq, 1070 (int) rxs->c_ieee, 1071 flags, 1072 c); 1073 1074 return (c); 1075} 1076 1077static void 1078addmedia(struct ifmedia *media, int caps, int addsta, int mode, int mword) 1079{ 1080#define ADD(_ic, _s, _o) \ 1081 ifmedia_add(media, \ 1082 IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL) 1083 static const u_int mopts[IEEE80211_MODE_MAX] = { 1084 [IEEE80211_MODE_AUTO] = IFM_AUTO, 1085 [IEEE80211_MODE_11A] = IFM_IEEE80211_11A, 1086 [IEEE80211_MODE_11B] = IFM_IEEE80211_11B, 1087 [IEEE80211_MODE_11G] = IFM_IEEE80211_11G, 1088 [IEEE80211_MODE_FH] = IFM_IEEE80211_FH, 1089 [IEEE80211_MODE_TURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO, 1090 [IEEE80211_MODE_TURBO_G] = IFM_IEEE80211_11G|IFM_IEEE80211_TURBO, 1091 [IEEE80211_MODE_STURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO, 1092 [IEEE80211_MODE_HALF] = IFM_IEEE80211_11A, /* XXX */ 1093 [IEEE80211_MODE_QUARTER] = IFM_IEEE80211_11A, /* XXX */ 1094 [IEEE80211_MODE_11NA] = IFM_IEEE80211_11NA, 1095 [IEEE80211_MODE_11NG] = IFM_IEEE80211_11NG, 1096 }; 1097 u_int mopt; 1098 1099 mopt = mopts[mode]; 1100 if (addsta) 1101 ADD(ic, mword, mopt); /* STA mode has no cap */ 1102 if (caps & IEEE80211_C_IBSS) 1103 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC); 1104 if (caps & IEEE80211_C_HOSTAP) 1105 ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP); 1106 if (caps & IEEE80211_C_AHDEMO) 1107 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0); 1108 if (caps & IEEE80211_C_MONITOR) 1109 ADD(media, mword, mopt | IFM_IEEE80211_MONITOR); 1110 if (caps & IEEE80211_C_WDS) 1111 ADD(media, mword, mopt | IFM_IEEE80211_WDS); 1112 if (caps & IEEE80211_C_MBSS) 1113 ADD(media, mword, mopt | IFM_IEEE80211_MBSS); 1114#undef ADD 1115} 1116 1117/* 1118 * Setup the media data structures according to the channel and 1119 * rate tables. 1120 */ 1121static int 1122ieee80211_media_setup(struct ieee80211com *ic, 1123 struct ifmedia *media, int caps, int addsta, 1124 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) 1125{ 1126 int i, j, rate, maxrate, mword, r; 1127 enum ieee80211_phymode mode; 1128 const struct ieee80211_rateset *rs; 1129 struct ieee80211_rateset allrates; 1130 1131 /* 1132 * Fill in media characteristics. 1133 */ 1134 ifmedia_init(media, 0, media_change, media_stat); 1135 maxrate = 0; 1136 /* 1137 * Add media for legacy operating modes. 1138 */ 1139 memset(&allrates, 0, sizeof(allrates)); 1140 for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) { 1141 if (isclr(ic->ic_modecaps, mode)) 1142 continue; 1143 addmedia(media, caps, addsta, mode, IFM_AUTO); 1144 if (mode == IEEE80211_MODE_AUTO) 1145 continue; 1146 rs = &ic->ic_sup_rates[mode]; 1147 for (i = 0; i < rs->rs_nrates; i++) { 1148 rate = rs->rs_rates[i]; 1149 mword = ieee80211_rate2media(ic, rate, mode); 1150 if (mword == 0) 1151 continue; 1152 addmedia(media, caps, addsta, mode, mword); 1153 /* 1154 * Add legacy rate to the collection of all rates. 1155 */ 1156 r = rate & IEEE80211_RATE_VAL; 1157 for (j = 0; j < allrates.rs_nrates; j++) 1158 if (allrates.rs_rates[j] == r) 1159 break; 1160 if (j == allrates.rs_nrates) { 1161 /* unique, add to the set */ 1162 allrates.rs_rates[j] = r; 1163 allrates.rs_nrates++; 1164 } 1165 rate = (rate & IEEE80211_RATE_VAL) / 2; 1166 if (rate > maxrate) 1167 maxrate = rate; 1168 } 1169 } 1170 for (i = 0; i < allrates.rs_nrates; i++) { 1171 mword = ieee80211_rate2media(ic, allrates.rs_rates[i], 1172 IEEE80211_MODE_AUTO); 1173 if (mword == 0) 1174 continue; 1175 /* NB: remove media options from mword */ 1176 addmedia(media, caps, addsta, 1177 IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword)); 1178 } 1179 /* 1180 * Add HT/11n media. Note that we do not have enough 1181 * bits in the media subtype to express the MCS so we 1182 * use a "placeholder" media subtype and any fixed MCS 1183 * must be specified with a different mechanism. 1184 */ 1185 for (; mode <= IEEE80211_MODE_11NG; mode++) { 1186 if (isclr(ic->ic_modecaps, mode)) 1187 continue; 1188 addmedia(media, caps, addsta, mode, IFM_AUTO); 1189 addmedia(media, caps, addsta, mode, IFM_IEEE80211_MCS); 1190 } 1191 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) || 1192 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) { 1193 addmedia(media, caps, addsta, 1194 IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS); 1195 i = ic->ic_txstream * 8 - 1; 1196 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) && 1197 (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI40)) 1198 rate = ieee80211_htrates[i].ht40_rate_400ns; 1199 else if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40)) 1200 rate = ieee80211_htrates[i].ht40_rate_800ns; 1201 else if ((ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI20)) 1202 rate = ieee80211_htrates[i].ht20_rate_400ns; 1203 else 1204 rate = ieee80211_htrates[i].ht20_rate_800ns; 1205 if (rate > maxrate) 1206 maxrate = rate; 1207 } 1208 return maxrate; 1209} 1210 1211void 1212ieee80211_media_init(struct ieee80211com *ic) 1213{ 1214 struct ifnet *ifp = ic->ic_ifp; 1215 int maxrate; 1216 1217 /* NB: this works because the structure is initialized to zero */ 1218 if (!LIST_EMPTY(&ic->ic_media.ifm_list)) { 1219 /* 1220 * We are re-initializing the channel list; clear 1221 * the existing media state as the media routines 1222 * don't suppress duplicates. 1223 */ 1224 ifmedia_removeall(&ic->ic_media); 1225 } 1226 ieee80211_chan_init(ic); 1227 1228 /* 1229 * Recalculate media settings in case new channel list changes 1230 * the set of available modes. 1231 */ 1232 maxrate = ieee80211_media_setup(ic, &ic->ic_media, ic->ic_caps, 1, 1233 ieee80211com_media_change, ieee80211com_media_status); 1234 /* NB: strip explicit mode; we're actually in autoselect */ 1235 ifmedia_set(&ic->ic_media, 1236 media_status(ic->ic_opmode, ic->ic_curchan) &~ 1237 (IFM_MMASK | IFM_IEEE80211_TURBO)); 1238 if (maxrate) 1239 ifp->if_baudrate = IF_Mbps(maxrate); 1240 1241 /* XXX need to propagate new media settings to vap's */ 1242} 1243 1244/* XXX inline or eliminate? */ 1245const struct ieee80211_rateset * 1246ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c) 1247{ 1248 /* XXX does this work for 11ng basic rates? */ 1249 return &ic->ic_sup_rates[ieee80211_chan2mode(c)]; 1250} 1251 1252void 1253ieee80211_announce(struct ieee80211com *ic) 1254{ 1255 int i, rate, mword; 1256 enum ieee80211_phymode mode; 1257 const struct ieee80211_rateset *rs; 1258 1259 /* NB: skip AUTO since it has no rates */ 1260 for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) { 1261 if (isclr(ic->ic_modecaps, mode)) 1262 continue; 1263 ic_printf(ic, "%s rates: ", ieee80211_phymode_name[mode]); 1264 rs = &ic->ic_sup_rates[mode]; 1265 for (i = 0; i < rs->rs_nrates; i++) { 1266 mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode); 1267 if (mword == 0) 1268 continue; 1269 rate = ieee80211_media2rate(mword); 1270 printf("%s%d%sMbps", (i != 0 ? " " : ""), 1271 rate / 2, ((rate & 0x1) != 0 ? ".5" : "")); 1272 } 1273 printf("\n"); 1274 } 1275 ieee80211_ht_announce(ic); 1276} 1277 1278void 1279ieee80211_announce_channels(struct ieee80211com *ic) 1280{ 1281 const struct ieee80211_channel *c; 1282 char type; 1283 int i, cw; 1284 1285 printf("Chan Freq CW RegPwr MinPwr MaxPwr\n"); 1286 for (i = 0; i < ic->ic_nchans; i++) { 1287 c = &ic->ic_channels[i]; 1288 if (IEEE80211_IS_CHAN_ST(c)) 1289 type = 'S'; 1290 else if (IEEE80211_IS_CHAN_108A(c)) 1291 type = 'T'; 1292 else if (IEEE80211_IS_CHAN_108G(c)) 1293 type = 'G'; 1294 else if (IEEE80211_IS_CHAN_HT(c)) 1295 type = 'n'; 1296 else if (IEEE80211_IS_CHAN_A(c)) 1297 type = 'a'; 1298 else if (IEEE80211_IS_CHAN_ANYG(c)) 1299 type = 'g'; 1300 else if (IEEE80211_IS_CHAN_B(c)) 1301 type = 'b'; 1302 else 1303 type = 'f'; 1304 if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c)) 1305 cw = 40; 1306 else if (IEEE80211_IS_CHAN_HALF(c)) 1307 cw = 10; 1308 else if (IEEE80211_IS_CHAN_QUARTER(c)) 1309 cw = 5; 1310 else 1311 cw = 20; 1312 printf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n" 1313 , c->ic_ieee, c->ic_freq, type 1314 , cw 1315 , IEEE80211_IS_CHAN_HT40U(c) ? '+' : 1316 IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' ' 1317 , c->ic_maxregpower 1318 , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0 1319 , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0 1320 ); 1321 } 1322} 1323 1324static int 1325media2mode(const struct ifmedia_entry *ime, uint32_t flags, uint16_t *mode) 1326{ 1327 switch (IFM_MODE(ime->ifm_media)) { 1328 case IFM_IEEE80211_11A: 1329 *mode = IEEE80211_MODE_11A; 1330 break; 1331 case IFM_IEEE80211_11B: 1332 *mode = IEEE80211_MODE_11B; 1333 break; 1334 case IFM_IEEE80211_11G: 1335 *mode = IEEE80211_MODE_11G; 1336 break; 1337 case IFM_IEEE80211_FH: 1338 *mode = IEEE80211_MODE_FH; 1339 break; 1340 case IFM_IEEE80211_11NA: 1341 *mode = IEEE80211_MODE_11NA; 1342 break; 1343 case IFM_IEEE80211_11NG: 1344 *mode = IEEE80211_MODE_11NG; 1345 break; 1346 case IFM_AUTO: 1347 *mode = IEEE80211_MODE_AUTO; 1348 break; 1349 default: 1350 return 0; 1351 } 1352 /* 1353 * Turbo mode is an ``option''. 1354 * XXX does not apply to AUTO 1355 */ 1356 if (ime->ifm_media & IFM_IEEE80211_TURBO) { 1357 if (*mode == IEEE80211_MODE_11A) { 1358 if (flags & IEEE80211_F_TURBOP) 1359 *mode = IEEE80211_MODE_TURBO_A; 1360 else 1361 *mode = IEEE80211_MODE_STURBO_A; 1362 } else if (*mode == IEEE80211_MODE_11G) 1363 *mode = IEEE80211_MODE_TURBO_G; 1364 else 1365 return 0; 1366 } 1367 /* XXX HT40 +/- */ 1368 return 1; 1369} 1370 1371/* 1372 * Handle a media change request on the underlying interface. 1373 */ 1374int 1375ieee80211com_media_change(struct ifnet *ifp) 1376{ 1377 return EINVAL; 1378} 1379 1380/* 1381 * Handle a media change request on the vap interface. 1382 */ 1383int 1384ieee80211_media_change(struct ifnet *ifp) 1385{ 1386 struct ieee80211vap *vap = ifp->if_softc; 1387 struct ifmedia_entry *ime = vap->iv_media.ifm_cur; 1388 uint16_t newmode; 1389 1390 if (!media2mode(ime, vap->iv_flags, &newmode)) 1391 return EINVAL; 1392 if (vap->iv_des_mode != newmode) { 1393 vap->iv_des_mode = newmode; 1394 /* XXX kick state machine if up+running */ 1395 } 1396 return 0; 1397} 1398 1399/* 1400 * Common code to calculate the media status word 1401 * from the operating mode and channel state. 1402 */ 1403static int 1404media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan) 1405{ 1406 int status; 1407 1408 status = IFM_IEEE80211; 1409 switch (opmode) { 1410 case IEEE80211_M_STA: 1411 break; 1412 case IEEE80211_M_IBSS: 1413 status |= IFM_IEEE80211_ADHOC; 1414 break; 1415 case IEEE80211_M_HOSTAP: 1416 status |= IFM_IEEE80211_HOSTAP; 1417 break; 1418 case IEEE80211_M_MONITOR: 1419 status |= IFM_IEEE80211_MONITOR; 1420 break; 1421 case IEEE80211_M_AHDEMO: 1422 status |= IFM_IEEE80211_ADHOC | IFM_FLAG0; 1423 break; 1424 case IEEE80211_M_WDS: 1425 status |= IFM_IEEE80211_WDS; 1426 break; 1427 case IEEE80211_M_MBSS: 1428 status |= IFM_IEEE80211_MBSS; 1429 break; 1430 } 1431 if (IEEE80211_IS_CHAN_HTA(chan)) { 1432 status |= IFM_IEEE80211_11NA; 1433 } else if (IEEE80211_IS_CHAN_HTG(chan)) { 1434 status |= IFM_IEEE80211_11NG; 1435 } else if (IEEE80211_IS_CHAN_A(chan)) { 1436 status |= IFM_IEEE80211_11A; 1437 } else if (IEEE80211_IS_CHAN_B(chan)) { 1438 status |= IFM_IEEE80211_11B; 1439 } else if (IEEE80211_IS_CHAN_ANYG(chan)) { 1440 status |= IFM_IEEE80211_11G; 1441 } else if (IEEE80211_IS_CHAN_FHSS(chan)) { 1442 status |= IFM_IEEE80211_FH; 1443 } 1444 /* XXX else complain? */ 1445 1446 if (IEEE80211_IS_CHAN_TURBO(chan)) 1447 status |= IFM_IEEE80211_TURBO; 1448#if 0 1449 if (IEEE80211_IS_CHAN_HT20(chan)) 1450 status |= IFM_IEEE80211_HT20; 1451 if (IEEE80211_IS_CHAN_HT40(chan)) 1452 status |= IFM_IEEE80211_HT40; 1453#endif 1454 return status; 1455} 1456 1457static void 1458ieee80211com_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1459{ 1460 struct ieee80211com *ic = ifp->if_l2com; 1461 struct ieee80211vap *vap; 1462 1463 imr->ifm_status = IFM_AVALID; 1464 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1465 if (vap->iv_ifp->if_flags & IFF_UP) { 1466 imr->ifm_status |= IFM_ACTIVE; 1467 break; 1468 } 1469 imr->ifm_active = media_status(ic->ic_opmode, ic->ic_curchan); 1470 if (imr->ifm_status & IFM_ACTIVE) 1471 imr->ifm_current = imr->ifm_active; 1472} 1473 1474void 1475ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1476{ 1477 struct ieee80211vap *vap = ifp->if_softc; 1478 struct ieee80211com *ic = vap->iv_ic; 1479 enum ieee80211_phymode mode; 1480 1481 imr->ifm_status = IFM_AVALID; 1482 /* 1483 * NB: use the current channel's mode to lock down a xmit 1484 * rate only when running; otherwise we may have a mismatch 1485 * in which case the rate will not be convertible. 1486 */ 1487 if (vap->iv_state == IEEE80211_S_RUN || 1488 vap->iv_state == IEEE80211_S_SLEEP) { 1489 imr->ifm_status |= IFM_ACTIVE; 1490 mode = ieee80211_chan2mode(ic->ic_curchan); 1491 } else 1492 mode = IEEE80211_MODE_AUTO; 1493 imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan); 1494 /* 1495 * Calculate a current rate if possible. 1496 */ 1497 if (vap->iv_txparms[mode].ucastrate != IEEE80211_FIXED_RATE_NONE) { 1498 /* 1499 * A fixed rate is set, report that. 1500 */ 1501 imr->ifm_active |= ieee80211_rate2media(ic, 1502 vap->iv_txparms[mode].ucastrate, mode); 1503 } else if (vap->iv_opmode == IEEE80211_M_STA) { 1504 /* 1505 * In station mode report the current transmit rate. 1506 */ 1507 imr->ifm_active |= ieee80211_rate2media(ic, 1508 vap->iv_bss->ni_txrate, mode); 1509 } else 1510 imr->ifm_active |= IFM_AUTO; 1511 if (imr->ifm_status & IFM_ACTIVE) 1512 imr->ifm_current = imr->ifm_active; 1513} 1514 1515/* 1516 * Set the current phy mode and recalculate the active channel 1517 * set based on the available channels for this mode. Also 1518 * select a new default/current channel if the current one is 1519 * inappropriate for this mode. 1520 */ 1521int 1522ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode) 1523{ 1524 /* 1525 * Adjust basic rates in 11b/11g supported rate set. 1526 * Note that if operating on a hal/quarter rate channel 1527 * this is a noop as those rates sets are different 1528 * and used instead. 1529 */ 1530 if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B) 1531 ieee80211_setbasicrates(&ic->ic_sup_rates[mode], mode); 1532 1533 ic->ic_curmode = mode; 1534 ieee80211_reset_erp(ic); /* reset ERP state */ 1535 1536 return 0; 1537} 1538 1539/* 1540 * Return the phy mode for with the specified channel. 1541 */ 1542enum ieee80211_phymode 1543ieee80211_chan2mode(const struct ieee80211_channel *chan) 1544{ 1545 1546 if (IEEE80211_IS_CHAN_HTA(chan)) 1547 return IEEE80211_MODE_11NA; 1548 else if (IEEE80211_IS_CHAN_HTG(chan)) 1549 return IEEE80211_MODE_11NG; 1550 else if (IEEE80211_IS_CHAN_108G(chan)) 1551 return IEEE80211_MODE_TURBO_G; 1552 else if (IEEE80211_IS_CHAN_ST(chan)) 1553 return IEEE80211_MODE_STURBO_A; 1554 else if (IEEE80211_IS_CHAN_TURBO(chan)) 1555 return IEEE80211_MODE_TURBO_A; 1556 else if (IEEE80211_IS_CHAN_HALF(chan)) 1557 return IEEE80211_MODE_HALF; 1558 else if (IEEE80211_IS_CHAN_QUARTER(chan)) 1559 return IEEE80211_MODE_QUARTER; 1560 else if (IEEE80211_IS_CHAN_A(chan)) 1561 return IEEE80211_MODE_11A; 1562 else if (IEEE80211_IS_CHAN_ANYG(chan)) 1563 return IEEE80211_MODE_11G; 1564 else if (IEEE80211_IS_CHAN_B(chan)) 1565 return IEEE80211_MODE_11B; 1566 else if (IEEE80211_IS_CHAN_FHSS(chan)) 1567 return IEEE80211_MODE_FH; 1568 1569 /* NB: should not get here */ 1570 printf("%s: cannot map channel to mode; freq %u flags 0x%x\n", 1571 __func__, chan->ic_freq, chan->ic_flags); 1572 return IEEE80211_MODE_11B; 1573} 1574 1575struct ratemedia { 1576 u_int match; /* rate + mode */ 1577 u_int media; /* if_media rate */ 1578}; 1579 1580static int 1581findmedia(const struct ratemedia rates[], int n, u_int match) 1582{ 1583 int i; 1584 1585 for (i = 0; i < n; i++) 1586 if (rates[i].match == match) 1587 return rates[i].media; 1588 return IFM_AUTO; 1589} 1590 1591/* 1592 * Convert IEEE80211 rate value to ifmedia subtype. 1593 * Rate is either a legacy rate in units of 0.5Mbps 1594 * or an MCS index. 1595 */ 1596int 1597ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode) 1598{ 1599 static const struct ratemedia rates[] = { 1600 { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 }, 1601 { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 }, 1602 { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 }, 1603 { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 }, 1604 { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 }, 1605 { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 }, 1606 { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 }, 1607 { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 }, 1608 { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 }, 1609 { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 }, 1610 { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 }, 1611 { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 }, 1612 { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 }, 1613 { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 }, 1614 { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 }, 1615 { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 }, 1616 { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 }, 1617 { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 }, 1618 { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 }, 1619 { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 }, 1620 { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 }, 1621 { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 }, 1622 { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 }, 1623 { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 }, 1624 { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 }, 1625 { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 }, 1626 { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 }, 1627 { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 }, 1628 { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 }, 1629 { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 }, 1630 /* NB: OFDM72 doesn't realy exist so we don't handle it */ 1631 }; 1632 static const struct ratemedia htrates[] = { 1633 { 0, IFM_IEEE80211_MCS }, 1634 { 1, IFM_IEEE80211_MCS }, 1635 { 2, IFM_IEEE80211_MCS }, 1636 { 3, IFM_IEEE80211_MCS }, 1637 { 4, IFM_IEEE80211_MCS }, 1638 { 5, IFM_IEEE80211_MCS }, 1639 { 6, IFM_IEEE80211_MCS }, 1640 { 7, IFM_IEEE80211_MCS }, 1641 { 8, IFM_IEEE80211_MCS }, 1642 { 9, IFM_IEEE80211_MCS }, 1643 { 10, IFM_IEEE80211_MCS }, 1644 { 11, IFM_IEEE80211_MCS }, 1645 { 12, IFM_IEEE80211_MCS }, 1646 { 13, IFM_IEEE80211_MCS }, 1647 { 14, IFM_IEEE80211_MCS }, 1648 { 15, IFM_IEEE80211_MCS }, 1649 { 16, IFM_IEEE80211_MCS }, 1650 { 17, IFM_IEEE80211_MCS }, 1651 { 18, IFM_IEEE80211_MCS }, 1652 { 19, IFM_IEEE80211_MCS }, 1653 { 20, IFM_IEEE80211_MCS }, 1654 { 21, IFM_IEEE80211_MCS }, 1655 { 22, IFM_IEEE80211_MCS }, 1656 { 23, IFM_IEEE80211_MCS }, 1657 { 24, IFM_IEEE80211_MCS }, 1658 { 25, IFM_IEEE80211_MCS }, 1659 { 26, IFM_IEEE80211_MCS }, 1660 { 27, IFM_IEEE80211_MCS }, 1661 { 28, IFM_IEEE80211_MCS }, 1662 { 29, IFM_IEEE80211_MCS }, 1663 { 30, IFM_IEEE80211_MCS }, 1664 { 31, IFM_IEEE80211_MCS }, 1665 { 32, IFM_IEEE80211_MCS }, 1666 { 33, IFM_IEEE80211_MCS }, 1667 { 34, IFM_IEEE80211_MCS }, 1668 { 35, IFM_IEEE80211_MCS }, 1669 { 36, IFM_IEEE80211_MCS }, 1670 { 37, IFM_IEEE80211_MCS }, 1671 { 38, IFM_IEEE80211_MCS }, 1672 { 39, IFM_IEEE80211_MCS }, 1673 { 40, IFM_IEEE80211_MCS }, 1674 { 41, IFM_IEEE80211_MCS }, 1675 { 42, IFM_IEEE80211_MCS }, 1676 { 43, IFM_IEEE80211_MCS }, 1677 { 44, IFM_IEEE80211_MCS }, 1678 { 45, IFM_IEEE80211_MCS }, 1679 { 46, IFM_IEEE80211_MCS }, 1680 { 47, IFM_IEEE80211_MCS }, 1681 { 48, IFM_IEEE80211_MCS }, 1682 { 49, IFM_IEEE80211_MCS }, 1683 { 50, IFM_IEEE80211_MCS }, 1684 { 51, IFM_IEEE80211_MCS }, 1685 { 52, IFM_IEEE80211_MCS }, 1686 { 53, IFM_IEEE80211_MCS }, 1687 { 54, IFM_IEEE80211_MCS }, 1688 { 55, IFM_IEEE80211_MCS }, 1689 { 56, IFM_IEEE80211_MCS }, 1690 { 57, IFM_IEEE80211_MCS }, 1691 { 58, IFM_IEEE80211_MCS }, 1692 { 59, IFM_IEEE80211_MCS }, 1693 { 60, IFM_IEEE80211_MCS }, 1694 { 61, IFM_IEEE80211_MCS }, 1695 { 62, IFM_IEEE80211_MCS }, 1696 { 63, IFM_IEEE80211_MCS }, 1697 { 64, IFM_IEEE80211_MCS }, 1698 { 65, IFM_IEEE80211_MCS }, 1699 { 66, IFM_IEEE80211_MCS }, 1700 { 67, IFM_IEEE80211_MCS }, 1701 { 68, IFM_IEEE80211_MCS }, 1702 { 69, IFM_IEEE80211_MCS }, 1703 { 70, IFM_IEEE80211_MCS }, 1704 { 71, IFM_IEEE80211_MCS }, 1705 { 72, IFM_IEEE80211_MCS }, 1706 { 73, IFM_IEEE80211_MCS }, 1707 { 74, IFM_IEEE80211_MCS }, 1708 { 75, IFM_IEEE80211_MCS }, 1709 { 76, IFM_IEEE80211_MCS }, 1710 }; 1711 int m; 1712 1713 /* 1714 * Check 11n rates first for match as an MCS. 1715 */ 1716 if (mode == IEEE80211_MODE_11NA) { 1717 if (rate & IEEE80211_RATE_MCS) { 1718 rate &= ~IEEE80211_RATE_MCS; 1719 m = findmedia(htrates, nitems(htrates), rate); 1720 if (m != IFM_AUTO) 1721 return m | IFM_IEEE80211_11NA; 1722 } 1723 } else if (mode == IEEE80211_MODE_11NG) { 1724 /* NB: 12 is ambiguous, it will be treated as an MCS */ 1725 if (rate & IEEE80211_RATE_MCS) { 1726 rate &= ~IEEE80211_RATE_MCS; 1727 m = findmedia(htrates, nitems(htrates), rate); 1728 if (m != IFM_AUTO) 1729 return m | IFM_IEEE80211_11NG; 1730 } 1731 } 1732 rate &= IEEE80211_RATE_VAL; 1733 switch (mode) { 1734 case IEEE80211_MODE_11A: 1735 case IEEE80211_MODE_HALF: /* XXX good 'nuf */ 1736 case IEEE80211_MODE_QUARTER: 1737 case IEEE80211_MODE_11NA: 1738 case IEEE80211_MODE_TURBO_A: 1739 case IEEE80211_MODE_STURBO_A: 1740 return findmedia(rates, nitems(rates), 1741 rate | IFM_IEEE80211_11A); 1742 case IEEE80211_MODE_11B: 1743 return findmedia(rates, nitems(rates), 1744 rate | IFM_IEEE80211_11B); 1745 case IEEE80211_MODE_FH: 1746 return findmedia(rates, nitems(rates), 1747 rate | IFM_IEEE80211_FH); 1748 case IEEE80211_MODE_AUTO: 1749 /* NB: ic may be NULL for some drivers */ 1750 if (ic != NULL && ic->ic_phytype == IEEE80211_T_FH) 1751 return findmedia(rates, nitems(rates), 1752 rate | IFM_IEEE80211_FH); 1753 /* NB: hack, 11g matches both 11b+11a rates */ 1754 /* fall thru... */ 1755 case IEEE80211_MODE_11G: 1756 case IEEE80211_MODE_11NG: 1757 case IEEE80211_MODE_TURBO_G: 1758 return findmedia(rates, nitems(rates), rate | IFM_IEEE80211_11G); 1759 } 1760 return IFM_AUTO; 1761} 1762 1763int 1764ieee80211_media2rate(int mword) 1765{ 1766 static const int ieeerates[] = { 1767 -1, /* IFM_AUTO */ 1768 0, /* IFM_MANUAL */ 1769 0, /* IFM_NONE */ 1770 2, /* IFM_IEEE80211_FH1 */ 1771 4, /* IFM_IEEE80211_FH2 */ 1772 2, /* IFM_IEEE80211_DS1 */ 1773 4, /* IFM_IEEE80211_DS2 */ 1774 11, /* IFM_IEEE80211_DS5 */ 1775 22, /* IFM_IEEE80211_DS11 */ 1776 44, /* IFM_IEEE80211_DS22 */ 1777 12, /* IFM_IEEE80211_OFDM6 */ 1778 18, /* IFM_IEEE80211_OFDM9 */ 1779 24, /* IFM_IEEE80211_OFDM12 */ 1780 36, /* IFM_IEEE80211_OFDM18 */ 1781 48, /* IFM_IEEE80211_OFDM24 */ 1782 72, /* IFM_IEEE80211_OFDM36 */ 1783 96, /* IFM_IEEE80211_OFDM48 */ 1784 108, /* IFM_IEEE80211_OFDM54 */ 1785 144, /* IFM_IEEE80211_OFDM72 */ 1786 0, /* IFM_IEEE80211_DS354k */ 1787 0, /* IFM_IEEE80211_DS512k */ 1788 6, /* IFM_IEEE80211_OFDM3 */ 1789 9, /* IFM_IEEE80211_OFDM4 */ 1790 54, /* IFM_IEEE80211_OFDM27 */ 1791 -1, /* IFM_IEEE80211_MCS */ 1792 }; 1793 return IFM_SUBTYPE(mword) < nitems(ieeerates) ? 1794 ieeerates[IFM_SUBTYPE(mword)] : 0; 1795} 1796 1797/* 1798 * The following hash function is adapted from "Hash Functions" by Bob Jenkins 1799 * ("Algorithm Alley", Dr. Dobbs Journal, September 1997). 1800 */ 1801#define mix(a, b, c) \ 1802do { \ 1803 a -= b; a -= c; a ^= (c >> 13); \ 1804 b -= c; b -= a; b ^= (a << 8); \ 1805 c -= a; c -= b; c ^= (b >> 13); \ 1806 a -= b; a -= c; a ^= (c >> 12); \ 1807 b -= c; b -= a; b ^= (a << 16); \ 1808 c -= a; c -= b; c ^= (b >> 5); \ 1809 a -= b; a -= c; a ^= (c >> 3); \ 1810 b -= c; b -= a; b ^= (a << 10); \ 1811 c -= a; c -= b; c ^= (b >> 15); \ 1812} while (/*CONSTCOND*/0) 1813 1814uint32_t 1815ieee80211_mac_hash(const struct ieee80211com *ic, 1816 const uint8_t addr[IEEE80211_ADDR_LEN]) 1817{ 1818 uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = ic->ic_hash_key; 1819 1820 b += addr[5] << 8; 1821 b += addr[4]; 1822 a += addr[3] << 24; 1823 a += addr[2] << 16; 1824 a += addr[1] << 8; 1825 a += addr[0]; 1826 1827 mix(a, b, c); 1828 1829 return c; 1830} 1831#undef mix 1832 1833char 1834ieee80211_channel_type_char(const struct ieee80211_channel *c) 1835{ 1836 if (IEEE80211_IS_CHAN_ST(c)) 1837 return 'S'; 1838 if (IEEE80211_IS_CHAN_108A(c)) 1839 return 'T'; 1840 if (IEEE80211_IS_CHAN_108G(c)) 1841 return 'G'; 1842 if (IEEE80211_IS_CHAN_HT(c)) 1843 return 'n'; 1844 if (IEEE80211_IS_CHAN_A(c)) 1845 return 'a'; 1846 if (IEEE80211_IS_CHAN_ANYG(c)) 1847 return 'g'; 1848 if (IEEE80211_IS_CHAN_B(c)) 1849 return 'b'; 1850 return 'f'; 1851} 1852