1 /*- 2 * Copyright (c) 2001 Atsushi Onoe 3 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 /* 31 * IEEE 802.11 generic handler 32 */ 33 #include "opt_wlan.h" 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/kernel.h> 38 #include <sys/socket.h> 39 #include <sys/sbuf.h> 40 41 #include <machine/stdarg.h> 42 43 #include <net/if.h> 44 #include <net/if_var.h> 45 #include <net/if_dl.h> 46 #include <net/if_media.h> 47 #include <net/if_types.h> 48 #include <net/ethernet.h> 49 50 #include <net80211/ieee80211_var.h> 51 #include <net80211/ieee80211_regdomain.h> 52 #ifdef IEEE80211_SUPPORT_SUPERG 53 #include <net80211/ieee80211_superg.h> 54 #endif 55 #include <net80211/ieee80211_ratectl.h> 56 57 #include <net/bpf.h> 58 59 const char *ieee80211_phymode_name[IEEE80211_MODE_MAX] = { 60 [IEEE80211_MODE_AUTO] = "auto", 61 [IEEE80211_MODE_11A] = "11a", 62 [IEEE80211_MODE_11B] = "11b", 63 [IEEE80211_MODE_11G] = "11g", 64 [IEEE80211_MODE_FH] = "FH", 65 [IEEE80211_MODE_TURBO_A] = "turboA", 66 [IEEE80211_MODE_TURBO_G] = "turboG", 67 [IEEE80211_MODE_STURBO_A] = "sturboA", 68 [IEEE80211_MODE_HALF] = "half", 69 [IEEE80211_MODE_QUARTER] = "quarter", 70 [IEEE80211_MODE_11NA] = "11na", 71 [IEEE80211_MODE_11NG] = "11ng", 72 }; 73 /* map ieee80211_opmode to the corresponding capability bit */ 74 const int ieee80211_opcap[IEEE80211_OPMODE_MAX] = { 75 [IEEE80211_M_IBSS] = IEEE80211_C_IBSS, 76 [IEEE80211_M_WDS] = IEEE80211_C_WDS, 77 [IEEE80211_M_STA] = IEEE80211_C_STA, 78 [IEEE80211_M_AHDEMO] = IEEE80211_C_AHDEMO, 79 [IEEE80211_M_HOSTAP] = IEEE80211_C_HOSTAP, 80 [IEEE80211_M_MONITOR] = IEEE80211_C_MONITOR, 81 #ifdef IEEE80211_SUPPORT_MESH 82 [IEEE80211_M_MBSS] = IEEE80211_C_MBSS, 83 #endif 84 }; 85 86 const uint8_t ieee80211broadcastaddr[IEEE80211_ADDR_LEN] = 87 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 88 89 static void ieee80211_syncflag_locked(struct ieee80211com *ic, int flag); 90 static void ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag); 91 static void ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag); 92 static int ieee80211_media_setup(struct ieee80211com *ic, 93 struct ifmedia *media, int caps, int addsta, 94 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat); 95 static int media_status(enum ieee80211_opmode, 96 const struct ieee80211_channel *); 97 static uint64_t ieee80211_get_counter(struct ifnet *, ift_counter); 98 99 MALLOC_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) 105 static const struct ieee80211_rateset ieee80211_rateset_11a = 106 { 8, { B(12), 18, B(24), 36, B(48), 72, 96, 108 } }; 107 static const struct ieee80211_rateset ieee80211_rateset_half = 108 { 8, { B(6), 9, B(12), 18, B(24), 36, 48, 54 } }; 109 static const struct ieee80211_rateset ieee80211_rateset_quarter = 110 { 8, { B(3), 4, B(6), 9, B(12), 18, 24, 27 } }; 111 static 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 */ 114 static 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 */ 123 void 124 ieee80211_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 } 225 226 static void 227 null_update_mcast(struct ieee80211com *ic) 228 { 229 230 ic_printf(ic, "need multicast update callback\n"); 231 } 232 233 static void 234 null_update_promisc(struct ieee80211com *ic) 235 { 236 237 ic_printf(ic, "need promiscuous mode update callback\n"); 238 } 239 240 static void 241 null_update_chw(struct ieee80211com *ic) 242 { 243 244 ic_printf(ic, "%s: need callback\n", __func__); 245 } 246 247 int 248 ic_printf(struct ieee80211com *ic, const char * fmt, ...) 249 { 250 va_list ap; 251 int retval; 252 253 retval = printf("%s: ", ic->ic_name); 254 va_start(ap, fmt); 255 retval += vprintf(fmt, ap); 256 va_end(ap); 257 return (retval); 258 } 259 260 static LIST_HEAD(, ieee80211com) ic_head = LIST_HEAD_INITIALIZER(ic_head); 261 static struct mtx ic_list_mtx; 262 MTX_SYSINIT(ic_list, &ic_list_mtx, "ieee80211com list", MTX_DEF); 263 264 static int 265 sysctl_ieee80211coms(SYSCTL_HANDLER_ARGS) 266 { 267 struct ieee80211com *ic; 268 struct sbuf *sb; 269 char *sp; 270 int error; 271 272 sb = sbuf_new_auto(); 273 sp = ""; 274 mtx_lock(&ic_list_mtx); 275 LIST_FOREACH(ic, &ic_head, ic_next) { 276 sbuf_printf(sb, "%s%s", sp, ic->ic_name); 277 sp = " "; 278 } 279 mtx_unlock(&ic_list_mtx); 280 sbuf_finish(sb); 281 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1); 282 sbuf_delete(sb); 283 return (error); 284 } 285 286 SYSCTL_PROC(_net_wlan, OID_AUTO, devices, 287 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, 288 sysctl_ieee80211coms, "A", "names of available 802.11 devices"); 289 290 /* 291 * Attach/setup the common net80211 state. Called by 292 * the driver on attach to prior to creating any vap's. 293 */ 294 void 295 ieee80211_ifattach(struct ieee80211com *ic) 296 { 297 298 IEEE80211_LOCK_INIT(ic, ic->ic_name); 299 IEEE80211_TX_LOCK_INIT(ic, ic->ic_name); 300 TAILQ_INIT(&ic->ic_vaps); 301 302 /* Create a taskqueue for all state changes */ 303 ic->ic_tq = taskqueue_create("ic_taskq", M_WAITOK | M_ZERO, 304 taskqueue_thread_enqueue, &ic->ic_tq); 305 taskqueue_start_threads(&ic->ic_tq, 1, PI_NET, "%s net80211 taskq", 306 ic->ic_name); 307 ic->ic_ierrors = counter_u64_alloc(M_WAITOK); 308 ic->ic_oerrors = counter_u64_alloc(M_WAITOK); 309 /* 310 * Fill in 802.11 available channel set, mark all 311 * available channels as active, and pick a default 312 * channel if not already specified. 313 */ 314 ieee80211_chan_init(ic); 315 316 ic->ic_update_mcast = null_update_mcast; 317 ic->ic_update_promisc = null_update_promisc; 318 ic->ic_update_chw = null_update_chw; 319 320 ic->ic_hash_key = arc4random(); 321 ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT; 322 ic->ic_lintval = ic->ic_bintval; 323 ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX; 324 325 ieee80211_crypto_attach(ic); 326 ieee80211_node_attach(ic); 327 ieee80211_power_attach(ic); 328 ieee80211_proto_attach(ic); 329 #ifdef IEEE80211_SUPPORT_SUPERG 330 ieee80211_superg_attach(ic); 331 #endif 332 ieee80211_ht_attach(ic); 333 ieee80211_scan_attach(ic); 334 ieee80211_regdomain_attach(ic); 335 ieee80211_dfs_attach(ic); 336 337 ieee80211_sysctl_attach(ic); 338 339 mtx_lock(&ic_list_mtx); 340 LIST_INSERT_HEAD(&ic_head, ic, ic_next); 341 mtx_unlock(&ic_list_mtx); 342 } 343 344 /* 345 * Detach net80211 state on device detach. Tear down 346 * all vap's and reclaim all common state prior to the 347 * device state going away. Note we may call back into 348 * driver; it must be prepared for this. 349 */ 350 void 351 ieee80211_ifdetach(struct ieee80211com *ic) 352 { 353 struct ieee80211vap *vap; 354 355 mtx_lock(&ic_list_mtx); 356 LIST_REMOVE(ic, ic_next); 357 mtx_unlock(&ic_list_mtx); 358 359 taskqueue_drain(taskqueue_thread, &ic->ic_restart_task); 360 361 /* 362 * The VAP is responsible for setting and clearing 363 * the VIMAGE context. 364 */ 365 while ((vap = TAILQ_FIRST(&ic->ic_vaps)) != NULL) 366 ieee80211_vap_destroy(vap); 367 ieee80211_waitfor_parent(ic); 368 369 ieee80211_sysctl_detach(ic); 370 ieee80211_dfs_detach(ic); 371 ieee80211_regdomain_detach(ic); 372 ieee80211_scan_detach(ic); 373 #ifdef IEEE80211_SUPPORT_SUPERG 374 ieee80211_superg_detach(ic); 375 #endif 376 ieee80211_ht_detach(ic); 377 /* NB: must be called before ieee80211_node_detach */ 378 ieee80211_proto_detach(ic); 379 ieee80211_crypto_detach(ic); 380 ieee80211_power_detach(ic); 381 ieee80211_node_detach(ic); 382 383 counter_u64_free(ic->ic_ierrors); 384 counter_u64_free(ic->ic_oerrors); 385 386 taskqueue_free(ic->ic_tq); 387 IEEE80211_TX_LOCK_DESTROY(ic); 388 IEEE80211_LOCK_DESTROY(ic); 389 } 390 391 struct ieee80211com * 392 ieee80211_find_com(const char *name) 393 { 394 struct ieee80211com *ic; 395 396 mtx_lock(&ic_list_mtx); 397 LIST_FOREACH(ic, &ic_head, ic_next) 398 if (strcmp(ic->ic_name, name) == 0) 399 break; 400 mtx_unlock(&ic_list_mtx); 401 402 return (ic); 403 } 404 405 /* 406 * Default reset method for use with the ioctl support. This 407 * method is invoked after any state change in the 802.11 408 * layer that should be propagated to the hardware but not 409 * require re-initialization of the 802.11 state machine (e.g 410 * rescanning for an ap). We always return ENETRESET which 411 * should cause the driver to re-initialize the device. Drivers 412 * can override this method to implement more optimized support. 413 */ 414 static int 415 default_reset(struct ieee80211vap *vap, u_long cmd) 416 { 417 return ENETRESET; 418 } 419 420 /* 421 * Add underlying device errors to vap errors. 422 */ 423 static uint64_t 424 ieee80211_get_counter(struct ifnet *ifp, ift_counter cnt) 425 { 426 struct ieee80211vap *vap = ifp->if_softc; 427 struct ieee80211com *ic = vap->iv_ic; 428 uint64_t rv; 429 430 rv = if_get_counter_default(ifp, cnt); 431 switch (cnt) { 432 case IFCOUNTER_OERRORS: 433 rv += counter_u64_fetch(ic->ic_oerrors); 434 break; 435 case IFCOUNTER_IERRORS: 436 rv += counter_u64_fetch(ic->ic_ierrors); 437 break; 438 default: 439 break; 440 } 441 442 return (rv); 443 } 444 445 /* 446 * Prepare a vap for use. Drivers use this call to 447 * setup net80211 state in new vap's prior attaching 448 * them with ieee80211_vap_attach (below). 449 */ 450 int 451 ieee80211_vap_setup(struct ieee80211com *ic, struct ieee80211vap *vap, 452 const char name[IFNAMSIZ], int unit, enum ieee80211_opmode opmode, 453 int flags, const uint8_t bssid[IEEE80211_ADDR_LEN]) 454 { 455 struct ifnet *ifp; 456 457 ifp = if_alloc(IFT_ETHER); 458 if (ifp == NULL) { 459 ic_printf(ic, "%s: unable to allocate ifnet\n", 460 __func__); 461 return ENOMEM; 462 } 463 if_initname(ifp, name, unit); 464 ifp->if_softc = vap; /* back pointer */ 465 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 466 ifp->if_transmit = ieee80211_vap_transmit; 467 ifp->if_qflush = ieee80211_vap_qflush; 468 ifp->if_ioctl = ieee80211_ioctl; 469 ifp->if_init = ieee80211_init; 470 ifp->if_get_counter = ieee80211_get_counter; 471 472 vap->iv_ifp = ifp; 473 vap->iv_ic = ic; 474 vap->iv_flags = ic->ic_flags; /* propagate common flags */ 475 vap->iv_flags_ext = ic->ic_flags_ext; 476 vap->iv_flags_ven = ic->ic_flags_ven; 477 vap->iv_caps = ic->ic_caps &~ IEEE80211_C_OPMODE; 478 vap->iv_htcaps = ic->ic_htcaps; 479 vap->iv_htextcaps = ic->ic_htextcaps; 480 vap->iv_opmode = opmode; 481 vap->iv_caps |= ieee80211_opcap[opmode]; 482 vap->iv_myaddr = ic->ic_macaddr; 483 switch (opmode) { 484 case IEEE80211_M_WDS: 485 /* 486 * WDS links must specify the bssid of the far end. 487 * For legacy operation this is a static relationship. 488 * For non-legacy operation the station must associate 489 * and be authorized to pass traffic. Plumbing the 490 * vap to the proper node happens when the vap 491 * transitions to RUN state. 492 */ 493 IEEE80211_ADDR_COPY(vap->iv_des_bssid, bssid); 494 vap->iv_flags |= IEEE80211_F_DESBSSID; 495 if (flags & IEEE80211_CLONE_WDSLEGACY) 496 vap->iv_flags_ext |= IEEE80211_FEXT_WDSLEGACY; 497 break; 498 #ifdef IEEE80211_SUPPORT_TDMA 499 case IEEE80211_M_AHDEMO: 500 if (flags & IEEE80211_CLONE_TDMA) { 501 /* NB: checked before clone operation allowed */ 502 KASSERT(ic->ic_caps & IEEE80211_C_TDMA, 503 ("not TDMA capable, ic_caps 0x%x", ic->ic_caps)); 504 /* 505 * Propagate TDMA capability to mark vap; this 506 * cannot be removed and is used to distinguish 507 * regular ahdemo operation from ahdemo+tdma. 508 */ 509 vap->iv_caps |= IEEE80211_C_TDMA; 510 } 511 break; 512 #endif 513 default: 514 break; 515 } 516 /* auto-enable s/w beacon miss support */ 517 if (flags & IEEE80211_CLONE_NOBEACONS) 518 vap->iv_flags_ext |= IEEE80211_FEXT_SWBMISS; 519 /* auto-generated or user supplied MAC address */ 520 if (flags & (IEEE80211_CLONE_BSSID|IEEE80211_CLONE_MACADDR)) 521 vap->iv_flags_ext |= IEEE80211_FEXT_UNIQMAC; 522 /* 523 * Enable various functionality by default if we're 524 * capable; the driver can override us if it knows better. 525 */ 526 if (vap->iv_caps & IEEE80211_C_WME) 527 vap->iv_flags |= IEEE80211_F_WME; 528 if (vap->iv_caps & IEEE80211_C_BURST) 529 vap->iv_flags |= IEEE80211_F_BURST; 530 /* NB: bg scanning only makes sense for station mode right now */ 531 if (vap->iv_opmode == IEEE80211_M_STA && 532 (vap->iv_caps & IEEE80211_C_BGSCAN)) 533 vap->iv_flags |= IEEE80211_F_BGSCAN; 534 vap->iv_flags |= IEEE80211_F_DOTH; /* XXX no cap, just ena */ 535 /* NB: DFS support only makes sense for ap mode right now */ 536 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 537 (vap->iv_caps & IEEE80211_C_DFS)) 538 vap->iv_flags_ext |= IEEE80211_FEXT_DFS; 539 540 vap->iv_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */ 541 vap->iv_bmissthreshold = IEEE80211_HWBMISS_DEFAULT; 542 vap->iv_dtim_period = IEEE80211_DTIM_DEFAULT; 543 /* 544 * Install a default reset method for the ioctl support; 545 * the driver can override this. 546 */ 547 vap->iv_reset = default_reset; 548 549 ieee80211_sysctl_vattach(vap); 550 ieee80211_crypto_vattach(vap); 551 ieee80211_node_vattach(vap); 552 ieee80211_power_vattach(vap); 553 ieee80211_proto_vattach(vap); 554 #ifdef IEEE80211_SUPPORT_SUPERG 555 ieee80211_superg_vattach(vap); 556 #endif 557 ieee80211_ht_vattach(vap); 558 ieee80211_scan_vattach(vap); 559 ieee80211_regdomain_vattach(vap); 560 ieee80211_radiotap_vattach(vap); 561 ieee80211_ratectl_set(vap, IEEE80211_RATECTL_NONE); 562 563 return 0; 564 } 565 566 /* 567 * Activate a vap. State should have been prepared with a 568 * call to ieee80211_vap_setup and by the driver. On return 569 * from this call the vap is ready for use. 570 */ 571 int 572 ieee80211_vap_attach(struct ieee80211vap *vap, ifm_change_cb_t media_change, 573 ifm_stat_cb_t media_stat, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 574 { 575 struct ifnet *ifp = vap->iv_ifp; 576 struct ieee80211com *ic = vap->iv_ic; 577 struct ifmediareq imr; 578 int maxrate; 579 580 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 581 "%s: %s parent %s flags 0x%x flags_ext 0x%x\n", 582 __func__, ieee80211_opmode_name[vap->iv_opmode], 583 ic->ic_name, vap->iv_flags, vap->iv_flags_ext); 584 585 /* 586 * Do late attach work that cannot happen until after 587 * the driver has had a chance to override defaults. 588 */ 589 ieee80211_node_latevattach(vap); 590 ieee80211_power_latevattach(vap); 591 592 maxrate = ieee80211_media_setup(ic, &vap->iv_media, vap->iv_caps, 593 vap->iv_opmode == IEEE80211_M_STA, media_change, media_stat); 594 ieee80211_media_status(ifp, &imr); 595 /* NB: strip explicit mode; we're actually in autoselect */ 596 ifmedia_set(&vap->iv_media, 597 imr.ifm_active &~ (IFM_MMASK | IFM_IEEE80211_TURBO)); 598 if (maxrate) 599 ifp->if_baudrate = IF_Mbps(maxrate); 600 601 ether_ifattach(ifp, macaddr); 602 vap->iv_myaddr = IF_LLADDR(ifp); 603 /* hook output method setup by ether_ifattach */ 604 vap->iv_output = ifp->if_output; 605 ifp->if_output = ieee80211_output; 606 /* NB: if_mtu set by ether_ifattach to ETHERMTU */ 607 608 IEEE80211_LOCK(ic); 609 TAILQ_INSERT_TAIL(&ic->ic_vaps, vap, iv_next); 610 ieee80211_syncflag_locked(ic, IEEE80211_F_WME); 611 #ifdef IEEE80211_SUPPORT_SUPERG 612 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); 613 #endif 614 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); 615 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); 616 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT); 617 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40); 618 IEEE80211_UNLOCK(ic); 619 620 return 1; 621 } 622 623 /* 624 * Tear down vap state and reclaim the ifnet. 625 * The driver is assumed to have prepared for 626 * this; e.g. by turning off interrupts for the 627 * underlying device. 628 */ 629 void 630 ieee80211_vap_detach(struct ieee80211vap *vap) 631 { 632 struct ieee80211com *ic = vap->iv_ic; 633 struct ifnet *ifp = vap->iv_ifp; 634 635 CURVNET_SET(ifp->if_vnet); 636 637 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s parent %s\n", 638 __func__, ieee80211_opmode_name[vap->iv_opmode], ic->ic_name); 639 640 /* NB: bpfdetach is called by ether_ifdetach and claims all taps */ 641 ether_ifdetach(ifp); 642 643 ieee80211_stop(vap); 644 645 /* 646 * Flush any deferred vap tasks. 647 */ 648 ieee80211_draintask(ic, &vap->iv_nstate_task); 649 ieee80211_draintask(ic, &vap->iv_swbmiss_task); 650 651 /* XXX band-aid until ifnet handles this for us */ 652 taskqueue_drain(taskqueue_swi, &ifp->if_linktask); 653 654 IEEE80211_LOCK(ic); 655 KASSERT(vap->iv_state == IEEE80211_S_INIT , ("vap still running")); 656 TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next); 657 ieee80211_syncflag_locked(ic, IEEE80211_F_WME); 658 #ifdef IEEE80211_SUPPORT_SUPERG 659 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); 660 #endif 661 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); 662 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); 663 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT); 664 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40); 665 /* NB: this handles the bpfdetach done below */ 666 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_BPF); 667 if (vap->iv_ifflags & IFF_PROMISC) 668 ieee80211_promisc(vap, false); 669 if (vap->iv_ifflags & IFF_ALLMULTI) 670 ieee80211_allmulti(vap, false); 671 IEEE80211_UNLOCK(ic); 672 673 ifmedia_removeall(&vap->iv_media); 674 675 ieee80211_radiotap_vdetach(vap); 676 ieee80211_regdomain_vdetach(vap); 677 ieee80211_scan_vdetach(vap); 678 #ifdef IEEE80211_SUPPORT_SUPERG 679 ieee80211_superg_vdetach(vap); 680 #endif 681 ieee80211_ht_vdetach(vap); 682 /* NB: must be before ieee80211_node_vdetach */ 683 ieee80211_proto_vdetach(vap); 684 ieee80211_crypto_vdetach(vap); 685 ieee80211_power_vdetach(vap); 686 ieee80211_node_vdetach(vap); 687 ieee80211_sysctl_vdetach(vap); 688 689 if_free(ifp); 690 691 CURVNET_RESTORE(); 692 } 693 694 /* 695 * Count number of vaps in promisc, and issue promisc on 696 * parent respectively. 697 */ 698 void 699 ieee80211_promisc(struct ieee80211vap *vap, bool on) 700 { 701 struct ieee80211com *ic = vap->iv_ic; 702 703 /* 704 * XXX the bridge sets PROMISC but we don't want to 705 * enable it on the device, discard here so all the 706 * drivers don't need to special-case it 707 */ 708 if (!(vap->iv_opmode == IEEE80211_M_MONITOR || 709 (vap->iv_opmode == IEEE80211_M_AHDEMO && 710 (vap->iv_caps & IEEE80211_C_TDMA) == 0))) 711 return; 712 713 IEEE80211_LOCK(ic); 714 if (on) { 715 if (++ic->ic_promisc == 1) 716 ieee80211_runtask(ic, &ic->ic_promisc_task); 717 } else { 718 KASSERT(ic->ic_promisc > 0, ("%s: ic %p not promisc", 719 __func__, ic)); 720 if (--ic->ic_promisc == 0) 721 ieee80211_runtask(ic, &ic->ic_promisc_task); 722 } 723 IEEE80211_UNLOCK(ic); 724 } 725 726 /* 727 * Count number of vaps in allmulti, and issue allmulti on 728 * parent respectively. 729 */ 730 void 731 ieee80211_allmulti(struct ieee80211vap *vap, bool on) 732 { 733 struct ieee80211com *ic = vap->iv_ic; 734 735 IEEE80211_LOCK(ic); 736 if (on) { 737 if (++ic->ic_allmulti == 1) 738 ieee80211_runtask(ic, &ic->ic_mcast_task); 739 } else { 740 KASSERT(ic->ic_allmulti > 0, ("%s: ic %p not allmulti", 741 __func__, ic)); 742 if (--ic->ic_allmulti == 0) 743 ieee80211_runtask(ic, &ic->ic_mcast_task); 744 } 745 IEEE80211_UNLOCK(ic); 746 } 747 748 /* 749 * Synchronize flag bit state in the com structure 750 * according to the state of all vap's. This is used, 751 * for example, to handle state changes via ioctls. 752 */ 753 static void 754 ieee80211_syncflag_locked(struct ieee80211com *ic, int flag) 755 { 756 struct ieee80211vap *vap; 757 int bit; 758 759 IEEE80211_LOCK_ASSERT(ic); 760 761 bit = 0; 762 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 763 if (vap->iv_flags & flag) { 764 bit = 1; 765 break; 766 } 767 if (bit) 768 ic->ic_flags |= flag; 769 else 770 ic->ic_flags &= ~flag; 771 } 772 773 void 774 ieee80211_syncflag(struct ieee80211vap *vap, int flag) 775 { 776 struct ieee80211com *ic = vap->iv_ic; 777 778 IEEE80211_LOCK(ic); 779 if (flag < 0) { 780 flag = -flag; 781 vap->iv_flags &= ~flag; 782 } else 783 vap->iv_flags |= flag; 784 ieee80211_syncflag_locked(ic, flag); 785 IEEE80211_UNLOCK(ic); 786 } 787 788 /* 789 * Synchronize flags_ht bit state in the com structure 790 * according to the state of all vap's. This is used, 791 * for example, to handle state changes via ioctls. 792 */ 793 static void 794 ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag) 795 { 796 struct ieee80211vap *vap; 797 int bit; 798 799 IEEE80211_LOCK_ASSERT(ic); 800 801 bit = 0; 802 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 803 if (vap->iv_flags_ht & flag) { 804 bit = 1; 805 break; 806 } 807 if (bit) 808 ic->ic_flags_ht |= flag; 809 else 810 ic->ic_flags_ht &= ~flag; 811 } 812 813 void 814 ieee80211_syncflag_ht(struct ieee80211vap *vap, int flag) 815 { 816 struct ieee80211com *ic = vap->iv_ic; 817 818 IEEE80211_LOCK(ic); 819 if (flag < 0) { 820 flag = -flag; 821 vap->iv_flags_ht &= ~flag; 822 } else 823 vap->iv_flags_ht |= flag; 824 ieee80211_syncflag_ht_locked(ic, flag); 825 IEEE80211_UNLOCK(ic); 826 } 827 828 /* 829 * Synchronize flags_ext bit state in the com structure 830 * according to the state of all vap's. This is used, 831 * for example, to handle state changes via ioctls. 832 */ 833 static void 834 ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag) 835 { 836 struct ieee80211vap *vap; 837 int bit; 838 839 IEEE80211_LOCK_ASSERT(ic); 840 841 bit = 0; 842 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 843 if (vap->iv_flags_ext & flag) { 844 bit = 1; 845 break; 846 } 847 if (bit) 848 ic->ic_flags_ext |= flag; 849 else 850 ic->ic_flags_ext &= ~flag; 851 } 852 853 void 854 ieee80211_syncflag_ext(struct ieee80211vap *vap, int flag) 855 { 856 struct ieee80211com *ic = vap->iv_ic; 857 858 IEEE80211_LOCK(ic); 859 if (flag < 0) { 860 flag = -flag; 861 vap->iv_flags_ext &= ~flag; 862 } else 863 vap->iv_flags_ext |= flag; 864 ieee80211_syncflag_ext_locked(ic, flag); 865 IEEE80211_UNLOCK(ic); 866 } 867 868 static __inline int 869 mapgsm(u_int freq, u_int flags) 870 { 871 freq *= 10; 872 if (flags & IEEE80211_CHAN_QUARTER) 873 freq += 5; 874 else if (flags & IEEE80211_CHAN_HALF) 875 freq += 10; 876 else 877 freq += 20; 878 /* NB: there is no 907/20 wide but leave room */ 879 return (freq - 906*10) / 5; 880 } 881 882 static __inline int 883 mappsb(u_int freq, u_int flags) 884 { 885 return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5; 886 } 887 888 /* 889 * Convert MHz frequency to IEEE channel number. 890 */ 891 int 892 ieee80211_mhz2ieee(u_int freq, u_int flags) 893 { 894 #define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990) 895 if (flags & IEEE80211_CHAN_GSM) 896 return mapgsm(freq, flags); 897 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 898 if (freq == 2484) 899 return 14; 900 if (freq < 2484) 901 return ((int) freq - 2407) / 5; 902 else 903 return 15 + ((freq - 2512) / 20); 904 } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */ 905 if (freq <= 5000) { 906 /* XXX check regdomain? */ 907 if (IS_FREQ_IN_PSB(freq)) 908 return mappsb(freq, flags); 909 return (freq - 4000) / 5; 910 } else 911 return (freq - 5000) / 5; 912 } else { /* either, guess */ 913 if (freq == 2484) 914 return 14; 915 if (freq < 2484) { 916 if (907 <= freq && freq <= 922) 917 return mapgsm(freq, flags); 918 return ((int) freq - 2407) / 5; 919 } 920 if (freq < 5000) { 921 if (IS_FREQ_IN_PSB(freq)) 922 return mappsb(freq, flags); 923 else if (freq > 4900) 924 return (freq - 4000) / 5; 925 else 926 return 15 + ((freq - 2512) / 20); 927 } 928 return (freq - 5000) / 5; 929 } 930 #undef IS_FREQ_IN_PSB 931 } 932 933 /* 934 * Convert channel to IEEE channel number. 935 */ 936 int 937 ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c) 938 { 939 if (c == NULL) { 940 ic_printf(ic, "invalid channel (NULL)\n"); 941 return 0; /* XXX */ 942 } 943 return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee); 944 } 945 946 /* 947 * Convert IEEE channel number to MHz frequency. 948 */ 949 u_int 950 ieee80211_ieee2mhz(u_int chan, u_int flags) 951 { 952 if (flags & IEEE80211_CHAN_GSM) 953 return 907 + 5 * (chan / 10); 954 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 955 if (chan == 14) 956 return 2484; 957 if (chan < 14) 958 return 2407 + chan*5; 959 else 960 return 2512 + ((chan-15)*20); 961 } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */ 962 if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) { 963 chan -= 37; 964 return 4940 + chan*5 + (chan % 5 ? 2 : 0); 965 } 966 return 5000 + (chan*5); 967 } else { /* either, guess */ 968 /* XXX can't distinguish PSB+GSM channels */ 969 if (chan == 14) 970 return 2484; 971 if (chan < 14) /* 0-13 */ 972 return 2407 + chan*5; 973 if (chan < 27) /* 15-26 */ 974 return 2512 + ((chan-15)*20); 975 return 5000 + (chan*5); 976 } 977 } 978 979 /* 980 * Locate a channel given a frequency+flags. We cache 981 * the previous lookup to optimize switching between two 982 * channels--as happens with dynamic turbo. 983 */ 984 struct ieee80211_channel * 985 ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags) 986 { 987 struct ieee80211_channel *c; 988 int i; 989 990 flags &= IEEE80211_CHAN_ALLTURBO; 991 c = ic->ic_prevchan; 992 if (c != NULL && c->ic_freq == freq && 993 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 994 return c; 995 /* brute force search */ 996 for (i = 0; i < ic->ic_nchans; i++) { 997 c = &ic->ic_channels[i]; 998 if (c->ic_freq == freq && 999 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 1000 return c; 1001 } 1002 return NULL; 1003 } 1004 1005 /* 1006 * Locate a channel given a channel number+flags. We cache 1007 * the previous lookup to optimize switching between two 1008 * channels--as happens with dynamic turbo. 1009 */ 1010 struct ieee80211_channel * 1011 ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags) 1012 { 1013 struct ieee80211_channel *c; 1014 int i; 1015 1016 flags &= IEEE80211_CHAN_ALLTURBO; 1017 c = ic->ic_prevchan; 1018 if (c != NULL && c->ic_ieee == ieee && 1019 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 1020 return c; 1021 /* brute force search */ 1022 for (i = 0; i < ic->ic_nchans; i++) { 1023 c = &ic->ic_channels[i]; 1024 if (c->ic_ieee == ieee && 1025 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 1026 return c; 1027 } 1028 return NULL; 1029 } 1030 1031 /* 1032 * Lookup a channel suitable for the given rx status. 1033 * 1034 * This is used to find a channel for a frame (eg beacon, probe 1035 * response) based purely on the received PHY information. 1036 * 1037 * For now it tries to do it based on R_FREQ / R_IEEE. 1038 * This is enough for 11bg and 11a (and thus 11ng/11na) 1039 * but it will not be enough for GSM, PSB channels and the 1040 * like. It also doesn't know about legacy-turbog and 1041 * legacy-turbo modes, which some offload NICs actually 1042 * support in weird ways. 1043 * 1044 * Takes the ic and rxstatus; returns the channel or NULL 1045 * if not found. 1046 * 1047 * XXX TODO: Add support for that when the need arises. 1048 */ 1049 struct ieee80211_channel * 1050 ieee80211_lookup_channel_rxstatus(struct ieee80211vap *vap, 1051 const struct ieee80211_rx_stats *rxs) 1052 { 1053 struct ieee80211com *ic = vap->iv_ic; 1054 uint32_t flags; 1055 struct ieee80211_channel *c; 1056 1057 if (rxs == NULL) 1058 return (NULL); 1059 1060 /* 1061 * Strictly speaking we only use freq for now, 1062 * however later on we may wish to just store 1063 * the ieee for verification. 1064 */ 1065 if ((rxs->r_flags & IEEE80211_R_FREQ) == 0) 1066 return (NULL); 1067 if ((rxs->r_flags & IEEE80211_R_IEEE) == 0) 1068 return (NULL); 1069 1070 /* 1071 * If the rx status contains a valid ieee/freq, then 1072 * ensure we populate the correct channel information 1073 * in rxchan before passing it up to the scan infrastructure. 1074 * Offload NICs will pass up beacons from all channels 1075 * during background scans. 1076 */ 1077 1078 /* Determine a band */ 1079 /* XXX should be done by the driver? */ 1080 if (rxs->c_freq < 3000) { 1081 flags = IEEE80211_CHAN_G; 1082 } else { 1083 flags = IEEE80211_CHAN_A; 1084 } 1085 1086 /* Channel lookup */ 1087 c = ieee80211_find_channel(ic, rxs->c_freq, flags); 1088 1089 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INPUT, 1090 "%s: freq=%d, ieee=%d, flags=0x%08x; c=%p\n", 1091 __func__, 1092 (int) rxs->c_freq, 1093 (int) rxs->c_ieee, 1094 flags, 1095 c); 1096 1097 return (c); 1098 } 1099 1100 static void 1101 addmedia(struct ifmedia *media, int caps, int addsta, int mode, int mword) 1102 { 1103 #define ADD(_ic, _s, _o) \ 1104 ifmedia_add(media, \ 1105 IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL) 1106 static const u_int mopts[IEEE80211_MODE_MAX] = { 1107 [IEEE80211_MODE_AUTO] = IFM_AUTO, 1108 [IEEE80211_MODE_11A] = IFM_IEEE80211_11A, 1109 [IEEE80211_MODE_11B] = IFM_IEEE80211_11B, 1110 [IEEE80211_MODE_11G] = IFM_IEEE80211_11G, 1111 [IEEE80211_MODE_FH] = IFM_IEEE80211_FH, 1112 [IEEE80211_MODE_TURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO, 1113 [IEEE80211_MODE_TURBO_G] = IFM_IEEE80211_11G|IFM_IEEE80211_TURBO, 1114 [IEEE80211_MODE_STURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO, 1115 [IEEE80211_MODE_HALF] = IFM_IEEE80211_11A, /* XXX */ 1116 [IEEE80211_MODE_QUARTER] = IFM_IEEE80211_11A, /* XXX */ 1117 [IEEE80211_MODE_11NA] = IFM_IEEE80211_11NA, 1118 [IEEE80211_MODE_11NG] = IFM_IEEE80211_11NG, 1119 }; 1120 u_int mopt; 1121 1122 mopt = mopts[mode]; 1123 if (addsta) 1124 ADD(ic, mword, mopt); /* STA mode has no cap */ 1125 if (caps & IEEE80211_C_IBSS) 1126 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC); 1127 if (caps & IEEE80211_C_HOSTAP) 1128 ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP); 1129 if (caps & IEEE80211_C_AHDEMO) 1130 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0); 1131 if (caps & IEEE80211_C_MONITOR) 1132 ADD(media, mword, mopt | IFM_IEEE80211_MONITOR); 1133 if (caps & IEEE80211_C_WDS) 1134 ADD(media, mword, mopt | IFM_IEEE80211_WDS); 1135 if (caps & IEEE80211_C_MBSS) 1136 ADD(media, mword, mopt | IFM_IEEE80211_MBSS); 1137 #undef ADD 1138 } 1139 1140 /* 1141 * Setup the media data structures according to the channel and 1142 * rate tables. 1143 */ 1144 static int 1145 ieee80211_media_setup(struct ieee80211com *ic, 1146 struct ifmedia *media, int caps, int addsta, 1147 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) 1148 { 1149 int i, j, rate, maxrate, mword, r; 1150 enum ieee80211_phymode mode; 1151 const struct ieee80211_rateset *rs; 1152 struct ieee80211_rateset allrates; 1153 1154 /* 1155 * Fill in media characteristics. 1156 */ 1157 ifmedia_init(media, 0, media_change, media_stat); 1158 maxrate = 0; 1159 /* 1160 * Add media for legacy operating modes. 1161 */ 1162 memset(&allrates, 0, sizeof(allrates)); 1163 for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) { 1164 if (isclr(ic->ic_modecaps, mode)) 1165 continue; 1166 addmedia(media, caps, addsta, mode, IFM_AUTO); 1167 if (mode == IEEE80211_MODE_AUTO) 1168 continue; 1169 rs = &ic->ic_sup_rates[mode]; 1170 for (i = 0; i < rs->rs_nrates; i++) { 1171 rate = rs->rs_rates[i]; 1172 mword = ieee80211_rate2media(ic, rate, mode); 1173 if (mword == 0) 1174 continue; 1175 addmedia(media, caps, addsta, mode, mword); 1176 /* 1177 * Add legacy rate to the collection of all rates. 1178 */ 1179 r = rate & IEEE80211_RATE_VAL; 1180 for (j = 0; j < allrates.rs_nrates; j++) 1181 if (allrates.rs_rates[j] == r) 1182 break; 1183 if (j == allrates.rs_nrates) { 1184 /* unique, add to the set */ 1185 allrates.rs_rates[j] = r; 1186 allrates.rs_nrates++; 1187 } 1188 rate = (rate & IEEE80211_RATE_VAL) / 2; 1189 if (rate > maxrate) 1190 maxrate = rate; 1191 } 1192 } 1193 for (i = 0; i < allrates.rs_nrates; i++) { 1194 mword = ieee80211_rate2media(ic, allrates.rs_rates[i], 1195 IEEE80211_MODE_AUTO); 1196 if (mword == 0) 1197 continue; 1198 /* NB: remove media options from mword */ 1199 addmedia(media, caps, addsta, 1200 IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword)); 1201 } 1202 /* 1203 * Add HT/11n media. Note that we do not have enough 1204 * bits in the media subtype to express the MCS so we 1205 * use a "placeholder" media subtype and any fixed MCS 1206 * must be specified with a different mechanism. 1207 */ 1208 for (; mode <= IEEE80211_MODE_11NG; mode++) { 1209 if (isclr(ic->ic_modecaps, mode)) 1210 continue; 1211 addmedia(media, caps, addsta, mode, IFM_AUTO); 1212 addmedia(media, caps, addsta, mode, IFM_IEEE80211_MCS); 1213 } 1214 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) || 1215 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) { 1216 addmedia(media, caps, addsta, 1217 IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS); 1218 i = ic->ic_txstream * 8 - 1; 1219 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) && 1220 (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI40)) 1221 rate = ieee80211_htrates[i].ht40_rate_400ns; 1222 else if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40)) 1223 rate = ieee80211_htrates[i].ht40_rate_800ns; 1224 else if ((ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI20)) 1225 rate = ieee80211_htrates[i].ht20_rate_400ns; 1226 else 1227 rate = ieee80211_htrates[i].ht20_rate_800ns; 1228 if (rate > maxrate) 1229 maxrate = rate; 1230 } 1231 return maxrate; 1232 } 1233 1234 /* XXX inline or eliminate? */ 1235 const struct ieee80211_rateset * 1236 ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c) 1237 { 1238 /* XXX does this work for 11ng basic rates? */ 1239 return &ic->ic_sup_rates[ieee80211_chan2mode(c)]; 1240 } 1241 1242 void 1243 ieee80211_announce(struct ieee80211com *ic) 1244 { 1245 int i, rate, mword; 1246 enum ieee80211_phymode mode; 1247 const struct ieee80211_rateset *rs; 1248 1249 /* NB: skip AUTO since it has no rates */ 1250 for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) { 1251 if (isclr(ic->ic_modecaps, mode)) 1252 continue; 1253 ic_printf(ic, "%s rates: ", ieee80211_phymode_name[mode]); 1254 rs = &ic->ic_sup_rates[mode]; 1255 for (i = 0; i < rs->rs_nrates; i++) { 1256 mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode); 1257 if (mword == 0) 1258 continue; 1259 rate = ieee80211_media2rate(mword); 1260 printf("%s%d%sMbps", (i != 0 ? " " : ""), 1261 rate / 2, ((rate & 0x1) != 0 ? ".5" : "")); 1262 } 1263 printf("\n"); 1264 } 1265 ieee80211_ht_announce(ic); 1266 } 1267 1268 void 1269 ieee80211_announce_channels(struct ieee80211com *ic) 1270 { 1271 const struct ieee80211_channel *c; 1272 char type; 1273 int i, cw; 1274 1275 printf("Chan Freq CW RegPwr MinPwr MaxPwr\n"); 1276 for (i = 0; i < ic->ic_nchans; i++) { 1277 c = &ic->ic_channels[i]; 1278 if (IEEE80211_IS_CHAN_ST(c)) 1279 type = 'S'; 1280 else if (IEEE80211_IS_CHAN_108A(c)) 1281 type = 'T'; 1282 else if (IEEE80211_IS_CHAN_108G(c)) 1283 type = 'G'; 1284 else if (IEEE80211_IS_CHAN_HT(c)) 1285 type = 'n'; 1286 else if (IEEE80211_IS_CHAN_A(c)) 1287 type = 'a'; 1288 else if (IEEE80211_IS_CHAN_ANYG(c)) 1289 type = 'g'; 1290 else if (IEEE80211_IS_CHAN_B(c)) 1291 type = 'b'; 1292 else 1293 type = 'f'; 1294 if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c)) 1295 cw = 40; 1296 else if (IEEE80211_IS_CHAN_HALF(c)) 1297 cw = 10; 1298 else if (IEEE80211_IS_CHAN_QUARTER(c)) 1299 cw = 5; 1300 else 1301 cw = 20; 1302 printf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n" 1303 , c->ic_ieee, c->ic_freq, type 1304 , cw 1305 , IEEE80211_IS_CHAN_HT40U(c) ? '+' : 1306 IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' ' 1307 , c->ic_maxregpower 1308 , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0 1309 , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0 1310 ); 1311 } 1312 } 1313 1314 static int 1315 media2mode(const struct ifmedia_entry *ime, uint32_t flags, uint16_t *mode) 1316 { 1317 switch (IFM_MODE(ime->ifm_media)) { 1318 case IFM_IEEE80211_11A: 1319 *mode = IEEE80211_MODE_11A; 1320 break; 1321 case IFM_IEEE80211_11B: 1322 *mode = IEEE80211_MODE_11B; 1323 break; 1324 case IFM_IEEE80211_11G: 1325 *mode = IEEE80211_MODE_11G; 1326 break; 1327 case IFM_IEEE80211_FH: 1328 *mode = IEEE80211_MODE_FH; 1329 break; 1330 case IFM_IEEE80211_11NA: 1331 *mode = IEEE80211_MODE_11NA; 1332 break; 1333 case IFM_IEEE80211_11NG: 1334 *mode = IEEE80211_MODE_11NG; 1335 break; 1336 case IFM_AUTO: 1337 *mode = IEEE80211_MODE_AUTO; 1338 break; 1339 default: 1340 return 0; 1341 } 1342 /* 1343 * Turbo mode is an ``option''. 1344 * XXX does not apply to AUTO 1345 */ 1346 if (ime->ifm_media & IFM_IEEE80211_TURBO) { 1347 if (*mode == IEEE80211_MODE_11A) { 1348 if (flags & IEEE80211_F_TURBOP) 1349 *mode = IEEE80211_MODE_TURBO_A; 1350 else 1351 *mode = IEEE80211_MODE_STURBO_A; 1352 } else if (*mode == IEEE80211_MODE_11G) 1353 *mode = IEEE80211_MODE_TURBO_G; 1354 else 1355 return 0; 1356 } 1357 /* XXX HT40 +/- */ 1358 return 1; 1359 } 1360 1361 /* 1362 * Handle a media change request on the vap interface. 1363 */ 1364 int 1365 ieee80211_media_change(struct ifnet *ifp) 1366 { 1367 struct ieee80211vap *vap = ifp->if_softc; 1368 struct ifmedia_entry *ime = vap->iv_media.ifm_cur; 1369 uint16_t newmode; 1370 1371 if (!media2mode(ime, vap->iv_flags, &newmode)) 1372 return EINVAL; 1373 if (vap->iv_des_mode != newmode) { 1374 vap->iv_des_mode = newmode; 1375 /* XXX kick state machine if up+running */ 1376 } 1377 return 0; 1378 } 1379 1380 /* 1381 * Common code to calculate the media status word 1382 * from the operating mode and channel state. 1383 */ 1384 static int 1385 media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan) 1386 { 1387 int status; 1388 1389 status = IFM_IEEE80211; 1390 switch (opmode) { 1391 case IEEE80211_M_STA: 1392 break; 1393 case IEEE80211_M_IBSS: 1394 status |= IFM_IEEE80211_ADHOC; 1395 break; 1396 case IEEE80211_M_HOSTAP: 1397 status |= IFM_IEEE80211_HOSTAP; 1398 break; 1399 case IEEE80211_M_MONITOR: 1400 status |= IFM_IEEE80211_MONITOR; 1401 break; 1402 case IEEE80211_M_AHDEMO: 1403 status |= IFM_IEEE80211_ADHOC | IFM_FLAG0; 1404 break; 1405 case IEEE80211_M_WDS: 1406 status |= IFM_IEEE80211_WDS; 1407 break; 1408 case IEEE80211_M_MBSS: 1409 status |= IFM_IEEE80211_MBSS; 1410 break; 1411 } 1412 if (IEEE80211_IS_CHAN_HTA(chan)) { 1413 status |= IFM_IEEE80211_11NA; 1414 } else if (IEEE80211_IS_CHAN_HTG(chan)) { 1415 status |= IFM_IEEE80211_11NG; 1416 } else if (IEEE80211_IS_CHAN_A(chan)) { 1417 status |= IFM_IEEE80211_11A; 1418 } else if (IEEE80211_IS_CHAN_B(chan)) { 1419 status |= IFM_IEEE80211_11B; 1420 } else if (IEEE80211_IS_CHAN_ANYG(chan)) { 1421 status |= IFM_IEEE80211_11G; 1422 } else if (IEEE80211_IS_CHAN_FHSS(chan)) { 1423 status |= IFM_IEEE80211_FH; 1424 } 1425 /* XXX else complain? */ 1426 1427 if (IEEE80211_IS_CHAN_TURBO(chan)) 1428 status |= IFM_IEEE80211_TURBO; 1429 #if 0 1430 if (IEEE80211_IS_CHAN_HT20(chan)) 1431 status |= IFM_IEEE80211_HT20; 1432 if (IEEE80211_IS_CHAN_HT40(chan)) 1433 status |= IFM_IEEE80211_HT40; 1434 #endif 1435 return status; 1436 } 1437 1438 void 1439 ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1440 { 1441 struct ieee80211vap *vap = ifp->if_softc; 1442 struct ieee80211com *ic = vap->iv_ic; 1443 enum ieee80211_phymode mode; 1444 1445 imr->ifm_status = IFM_AVALID; 1446 /* 1447 * NB: use the current channel's mode to lock down a xmit 1448 * rate only when running; otherwise we may have a mismatch 1449 * in which case the rate will not be convertible. 1450 */ 1451 if (vap->iv_state == IEEE80211_S_RUN || 1452 vap->iv_state == IEEE80211_S_SLEEP) { 1453 imr->ifm_status |= IFM_ACTIVE; 1454 mode = ieee80211_chan2mode(ic->ic_curchan); 1455 } else 1456 mode = IEEE80211_MODE_AUTO; 1457 imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan); 1458 /* 1459 * Calculate a current rate if possible. 1460 */ 1461 if (vap->iv_txparms[mode].ucastrate != IEEE80211_FIXED_RATE_NONE) { 1462 /* 1463 * A fixed rate is set, report that. 1464 */ 1465 imr->ifm_active |= ieee80211_rate2media(ic, 1466 vap->iv_txparms[mode].ucastrate, mode); 1467 } else if (vap->iv_opmode == IEEE80211_M_STA) { 1468 /* 1469 * In station mode report the current transmit rate. 1470 */ 1471 imr->ifm_active |= ieee80211_rate2media(ic, 1472 vap->iv_bss->ni_txrate, mode); 1473 } else 1474 imr->ifm_active |= IFM_AUTO; 1475 if (imr->ifm_status & IFM_ACTIVE) 1476 imr->ifm_current = imr->ifm_active; 1477 } 1478 1479 /* 1480 * Set the current phy mode and recalculate the active channel 1481 * set based on the available channels for this mode. Also 1482 * select a new default/current channel if the current one is 1483 * inappropriate for this mode. 1484 */ 1485 int 1486 ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode) 1487 { 1488 /* 1489 * Adjust basic rates in 11b/11g supported rate set. 1490 * Note that if operating on a hal/quarter rate channel 1491 * this is a noop as those rates sets are different 1492 * and used instead. 1493 */ 1494 if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B) 1495 ieee80211_setbasicrates(&ic->ic_sup_rates[mode], mode); 1496 1497 ic->ic_curmode = mode; 1498 ieee80211_reset_erp(ic); /* reset ERP state */ 1499 1500 return 0; 1501 } 1502 1503 /* 1504 * Return the phy mode for with the specified channel. 1505 */ 1506 enum ieee80211_phymode 1507 ieee80211_chan2mode(const struct ieee80211_channel *chan) 1508 { 1509 1510 if (IEEE80211_IS_CHAN_HTA(chan)) 1511 return IEEE80211_MODE_11NA; 1512 else if (IEEE80211_IS_CHAN_HTG(chan)) 1513 return IEEE80211_MODE_11NG; 1514 else if (IEEE80211_IS_CHAN_108G(chan)) 1515 return IEEE80211_MODE_TURBO_G; 1516 else if (IEEE80211_IS_CHAN_ST(chan)) 1517 return IEEE80211_MODE_STURBO_A; 1518 else if (IEEE80211_IS_CHAN_TURBO(chan)) 1519 return IEEE80211_MODE_TURBO_A; 1520 else if (IEEE80211_IS_CHAN_HALF(chan)) 1521 return IEEE80211_MODE_HALF; 1522 else if (IEEE80211_IS_CHAN_QUARTER(chan)) 1523 return IEEE80211_MODE_QUARTER; 1524 else if (IEEE80211_IS_CHAN_A(chan)) 1525 return IEEE80211_MODE_11A; 1526 else if (IEEE80211_IS_CHAN_ANYG(chan)) 1527 return IEEE80211_MODE_11G; 1528 else if (IEEE80211_IS_CHAN_B(chan)) 1529 return IEEE80211_MODE_11B; 1530 else if (IEEE80211_IS_CHAN_FHSS(chan)) 1531 return IEEE80211_MODE_FH; 1532 1533 /* NB: should not get here */ 1534 printf("%s: cannot map channel to mode; freq %u flags 0x%x\n", 1535 __func__, chan->ic_freq, chan->ic_flags); 1536 return IEEE80211_MODE_11B; 1537 } 1538 1539 struct ratemedia { 1540 u_int match; /* rate + mode */ 1541 u_int media; /* if_media rate */ 1542 }; 1543 1544 static int 1545 findmedia(const struct ratemedia rates[], int n, u_int match) 1546 { 1547 int i; 1548 1549 for (i = 0; i < n; i++) 1550 if (rates[i].match == match) 1551 return rates[i].media; 1552 return IFM_AUTO; 1553 } 1554 1555 /* 1556 * Convert IEEE80211 rate value to ifmedia subtype. 1557 * Rate is either a legacy rate in units of 0.5Mbps 1558 * or an MCS index. 1559 */ 1560 int 1561 ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode) 1562 { 1563 static const struct ratemedia rates[] = { 1564 { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 }, 1565 { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 }, 1566 { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 }, 1567 { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 }, 1568 { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 }, 1569 { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 }, 1570 { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 }, 1571 { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 }, 1572 { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 }, 1573 { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 }, 1574 { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 }, 1575 { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 }, 1576 { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 }, 1577 { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 }, 1578 { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 }, 1579 { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 }, 1580 { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 }, 1581 { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 }, 1582 { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 }, 1583 { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 }, 1584 { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 }, 1585 { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 }, 1586 { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 }, 1587 { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 }, 1588 { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 }, 1589 { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 }, 1590 { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 }, 1591 { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 }, 1592 { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 }, 1593 { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 }, 1594 /* NB: OFDM72 doesn't realy exist so we don't handle it */ 1595 }; 1596 static const struct ratemedia htrates[] = { 1597 { 0, IFM_IEEE80211_MCS }, 1598 { 1, IFM_IEEE80211_MCS }, 1599 { 2, IFM_IEEE80211_MCS }, 1600 { 3, IFM_IEEE80211_MCS }, 1601 { 4, IFM_IEEE80211_MCS }, 1602 { 5, IFM_IEEE80211_MCS }, 1603 { 6, IFM_IEEE80211_MCS }, 1604 { 7, IFM_IEEE80211_MCS }, 1605 { 8, IFM_IEEE80211_MCS }, 1606 { 9, IFM_IEEE80211_MCS }, 1607 { 10, IFM_IEEE80211_MCS }, 1608 { 11, IFM_IEEE80211_MCS }, 1609 { 12, IFM_IEEE80211_MCS }, 1610 { 13, IFM_IEEE80211_MCS }, 1611 { 14, IFM_IEEE80211_MCS }, 1612 { 15, IFM_IEEE80211_MCS }, 1613 { 16, IFM_IEEE80211_MCS }, 1614 { 17, IFM_IEEE80211_MCS }, 1615 { 18, IFM_IEEE80211_MCS }, 1616 { 19, IFM_IEEE80211_MCS }, 1617 { 20, IFM_IEEE80211_MCS }, 1618 { 21, IFM_IEEE80211_MCS }, 1619 { 22, IFM_IEEE80211_MCS }, 1620 { 23, IFM_IEEE80211_MCS }, 1621 { 24, IFM_IEEE80211_MCS }, 1622 { 25, IFM_IEEE80211_MCS }, 1623 { 26, IFM_IEEE80211_MCS }, 1624 { 27, IFM_IEEE80211_MCS }, 1625 { 28, IFM_IEEE80211_MCS }, 1626 { 29, IFM_IEEE80211_MCS }, 1627 { 30, IFM_IEEE80211_MCS }, 1628 { 31, IFM_IEEE80211_MCS }, 1629 { 32, IFM_IEEE80211_MCS }, 1630 { 33, IFM_IEEE80211_MCS }, 1631 { 34, IFM_IEEE80211_MCS }, 1632 { 35, IFM_IEEE80211_MCS }, 1633 { 36, IFM_IEEE80211_MCS }, 1634 { 37, IFM_IEEE80211_MCS }, 1635 { 38, IFM_IEEE80211_MCS }, 1636 { 39, IFM_IEEE80211_MCS }, 1637 { 40, IFM_IEEE80211_MCS }, 1638 { 41, IFM_IEEE80211_MCS }, 1639 { 42, IFM_IEEE80211_MCS }, 1640 { 43, IFM_IEEE80211_MCS }, 1641 { 44, IFM_IEEE80211_MCS }, 1642 { 45, IFM_IEEE80211_MCS }, 1643 { 46, IFM_IEEE80211_MCS }, 1644 { 47, IFM_IEEE80211_MCS }, 1645 { 48, IFM_IEEE80211_MCS }, 1646 { 49, IFM_IEEE80211_MCS }, 1647 { 50, IFM_IEEE80211_MCS }, 1648 { 51, IFM_IEEE80211_MCS }, 1649 { 52, IFM_IEEE80211_MCS }, 1650 { 53, IFM_IEEE80211_MCS }, 1651 { 54, IFM_IEEE80211_MCS }, 1652 { 55, IFM_IEEE80211_MCS }, 1653 { 56, IFM_IEEE80211_MCS }, 1654 { 57, IFM_IEEE80211_MCS }, 1655 { 58, IFM_IEEE80211_MCS }, 1656 { 59, IFM_IEEE80211_MCS }, 1657 { 60, IFM_IEEE80211_MCS }, 1658 { 61, IFM_IEEE80211_MCS }, 1659 { 62, IFM_IEEE80211_MCS }, 1660 { 63, IFM_IEEE80211_MCS }, 1661 { 64, IFM_IEEE80211_MCS }, 1662 { 65, IFM_IEEE80211_MCS }, 1663 { 66, IFM_IEEE80211_MCS }, 1664 { 67, IFM_IEEE80211_MCS }, 1665 { 68, IFM_IEEE80211_MCS }, 1666 { 69, IFM_IEEE80211_MCS }, 1667 { 70, IFM_IEEE80211_MCS }, 1668 { 71, IFM_IEEE80211_MCS }, 1669 { 72, IFM_IEEE80211_MCS }, 1670 { 73, IFM_IEEE80211_MCS }, 1671 { 74, IFM_IEEE80211_MCS }, 1672 { 75, IFM_IEEE80211_MCS }, 1673 { 76, IFM_IEEE80211_MCS }, 1674 }; 1675 int m; 1676 1677 /* 1678 * Check 11n rates first for match as an MCS. 1679 */ 1680 if (mode == IEEE80211_MODE_11NA) { 1681 if (rate & IEEE80211_RATE_MCS) { 1682 rate &= ~IEEE80211_RATE_MCS; 1683 m = findmedia(htrates, nitems(htrates), rate); 1684 if (m != IFM_AUTO) 1685 return m | IFM_IEEE80211_11NA; 1686 } 1687 } else if (mode == IEEE80211_MODE_11NG) { 1688 /* NB: 12 is ambiguous, it will be treated as an MCS */ 1689 if (rate & IEEE80211_RATE_MCS) { 1690 rate &= ~IEEE80211_RATE_MCS; 1691 m = findmedia(htrates, nitems(htrates), rate); 1692 if (m != IFM_AUTO) 1693 return m | IFM_IEEE80211_11NG; 1694 } 1695 } 1696 rate &= IEEE80211_RATE_VAL; 1697 switch (mode) { 1698 case IEEE80211_MODE_11A: 1699 case IEEE80211_MODE_HALF: /* XXX good 'nuf */ 1700 case IEEE80211_MODE_QUARTER: 1701 case IEEE80211_MODE_11NA: 1702 case IEEE80211_MODE_TURBO_A: 1703 case IEEE80211_MODE_STURBO_A: 1704 return findmedia(rates, nitems(rates), 1705 rate | IFM_IEEE80211_11A); 1706 case IEEE80211_MODE_11B: 1707 return findmedia(rates, nitems(rates), 1708 rate | IFM_IEEE80211_11B); 1709 case IEEE80211_MODE_FH: 1710 return findmedia(rates, nitems(rates), 1711 rate | IFM_IEEE80211_FH); 1712 case IEEE80211_MODE_AUTO: 1713 /* NB: ic may be NULL for some drivers */ 1714 if (ic != NULL && ic->ic_phytype == IEEE80211_T_FH) 1715 return findmedia(rates, nitems(rates), 1716 rate | IFM_IEEE80211_FH); 1717 /* NB: hack, 11g matches both 11b+11a rates */ 1718 /* fall thru... */ 1719 case IEEE80211_MODE_11G: 1720 case IEEE80211_MODE_11NG: 1721 case IEEE80211_MODE_TURBO_G: 1722 return findmedia(rates, nitems(rates), rate | IFM_IEEE80211_11G); 1723 } 1724 return IFM_AUTO; 1725 } 1726 1727 int 1728 ieee80211_media2rate(int mword) 1729 { 1730 static const int ieeerates[] = { 1731 -1, /* IFM_AUTO */ 1732 0, /* IFM_MANUAL */ 1733 0, /* IFM_NONE */ 1734 2, /* IFM_IEEE80211_FH1 */ 1735 4, /* IFM_IEEE80211_FH2 */ 1736 2, /* IFM_IEEE80211_DS1 */ 1737 4, /* IFM_IEEE80211_DS2 */ 1738 11, /* IFM_IEEE80211_DS5 */ 1739 22, /* IFM_IEEE80211_DS11 */ 1740 44, /* IFM_IEEE80211_DS22 */ 1741 12, /* IFM_IEEE80211_OFDM6 */ 1742 18, /* IFM_IEEE80211_OFDM9 */ 1743 24, /* IFM_IEEE80211_OFDM12 */ 1744 36, /* IFM_IEEE80211_OFDM18 */ 1745 48, /* IFM_IEEE80211_OFDM24 */ 1746 72, /* IFM_IEEE80211_OFDM36 */ 1747 96, /* IFM_IEEE80211_OFDM48 */ 1748 108, /* IFM_IEEE80211_OFDM54 */ 1749 144, /* IFM_IEEE80211_OFDM72 */ 1750 0, /* IFM_IEEE80211_DS354k */ 1751 0, /* IFM_IEEE80211_DS512k */ 1752 6, /* IFM_IEEE80211_OFDM3 */ 1753 9, /* IFM_IEEE80211_OFDM4 */ 1754 54, /* IFM_IEEE80211_OFDM27 */ 1755 -1, /* IFM_IEEE80211_MCS */ 1756 }; 1757 return IFM_SUBTYPE(mword) < nitems(ieeerates) ? 1758 ieeerates[IFM_SUBTYPE(mword)] : 0; 1759 } 1760 1761 /* 1762 * The following hash function is adapted from "Hash Functions" by Bob Jenkins 1763 * ("Algorithm Alley", Dr. Dobbs Journal, September 1997). 1764 */ 1765 #define mix(a, b, c) \ 1766 do { \ 1767 a -= b; a -= c; a ^= (c >> 13); \ 1768 b -= c; b -= a; b ^= (a << 8); \ 1769 c -= a; c -= b; c ^= (b >> 13); \ 1770 a -= b; a -= c; a ^= (c >> 12); \ 1771 b -= c; b -= a; b ^= (a << 16); \ 1772 c -= a; c -= b; c ^= (b >> 5); \ 1773 a -= b; a -= c; a ^= (c >> 3); \ 1774 b -= c; b -= a; b ^= (a << 10); \ 1775 c -= a; c -= b; c ^= (b >> 15); \ 1776 } while (/*CONSTCOND*/0) 1777 1778 uint32_t 1779 ieee80211_mac_hash(const struct ieee80211com *ic, 1780 const uint8_t addr[IEEE80211_ADDR_LEN]) 1781 { 1782 uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = ic->ic_hash_key; 1783 1784 b += addr[5] << 8; 1785 b += addr[4]; 1786 a += addr[3] << 24; 1787 a += addr[2] << 16; 1788 a += addr[1] << 8; 1789 a += addr[0]; 1790 1791 mix(a, b, c); 1792 1793 return c; 1794 } 1795 #undef mix 1796 1797 char 1798 ieee80211_channel_type_char(const struct ieee80211_channel *c) 1799 { 1800 if (IEEE80211_IS_CHAN_ST(c)) 1801 return 'S'; 1802 if (IEEE80211_IS_CHAN_108A(c)) 1803 return 'T'; 1804 if (IEEE80211_IS_CHAN_108G(c)) 1805 return 'G'; 1806 if (IEEE80211_IS_CHAN_HT(c)) 1807 return 'n'; 1808 if (IEEE80211_IS_CHAN_A(c)) 1809 return 'a'; 1810 if (IEEE80211_IS_CHAN_ANYG(c)) 1811 return 'g'; 1812 if (IEEE80211_IS_CHAN_B(c)) 1813 return 'b'; 1814 return 'f'; 1815 } 1816