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