ieee80211.c revision 1.56.18.2
1 /* $NetBSD: ieee80211.c,v 1.56.18.2 2018/07/12 16:35:34 phil Exp $ */ 2 3 /*- 4 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 5 * 6 * Copyright (c) 2001 Atsushi Onoe 7 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include <sys/cdefs.h> 32 #ifdef __FreeBSD__ 33 __FBSDID("$FreeBSD$"); 34 #endif 35 36 /* 37 * IEEE 802.11 generic handler 38 */ 39 #include "opt_wlan.h" 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/kernel.h> 44 #include <sys/malloc.h> 45 #include <sys/socket.h> 46 #include <sys/sbuf.h> 47 48 #ifdef __FreeBSD__ 49 #include <machine/stdarg.h> 50 #elif __NetBSD__ 51 #include <sys/stdarg.h> 52 #else 53 #error 54 #endif 55 56 #include <net/if.h> 57 #ifdef __FreeBSD__ 58 #include <net/if_var.h> 59 #endif 60 #include <net/if_dl.h> 61 #include <net/if_media.h> 62 #include <net/if_types.h> 63 #ifdef __FreeBSD__ 64 #include <net/ethernet.h> 65 #endif 66 #ifdef __NetBSD__ 67 #include <net/route.h> 68 #include <net/if_ether.h> 69 #endif 70 71 #include <net80211/ieee80211_var.h> 72 #include <net80211/ieee80211_regdomain.h> 73 #ifdef IEEE80211_SUPPORT_SUPERG 74 #include <net80211/ieee80211_superg.h> 75 #endif 76 #include <net80211/ieee80211_ratectl.h> 77 #include <net80211/ieee80211_vht.h> 78 79 #include <net/bpf.h> 80 81 #ifdef __NetBSD__ 82 #undef KASSERT 83 #define KASSERT(__cond, __complaint) FBSDKASSERT(__cond, __complaint) 84 #endif 85 86 const char *ieee80211_phymode_name[IEEE80211_MODE_MAX] = { 87 [IEEE80211_MODE_AUTO] = "auto", 88 [IEEE80211_MODE_11A] = "11a", 89 [IEEE80211_MODE_11B] = "11b", 90 [IEEE80211_MODE_11G] = "11g", 91 [IEEE80211_MODE_FH] = "FH", 92 [IEEE80211_MODE_TURBO_A] = "turboA", 93 [IEEE80211_MODE_TURBO_G] = "turboG", 94 [IEEE80211_MODE_STURBO_A] = "sturboA", 95 [IEEE80211_MODE_HALF] = "half", 96 [IEEE80211_MODE_QUARTER] = "quarter", 97 [IEEE80211_MODE_11NA] = "11na", 98 [IEEE80211_MODE_11NG] = "11ng", 99 [IEEE80211_MODE_VHT_2GHZ] = "11acg", 100 [IEEE80211_MODE_VHT_5GHZ] = "11ac", 101 }; 102 /* map ieee80211_opmode to the corresponding capability bit */ 103 const int ieee80211_opcap[IEEE80211_OPMODE_MAX] = { 104 [IEEE80211_M_IBSS] = IEEE80211_C_IBSS, 105 [IEEE80211_M_WDS] = IEEE80211_C_WDS, 106 [IEEE80211_M_STA] = IEEE80211_C_STA, 107 [IEEE80211_M_AHDEMO] = IEEE80211_C_AHDEMO, 108 [IEEE80211_M_HOSTAP] = IEEE80211_C_HOSTAP, 109 [IEEE80211_M_MONITOR] = IEEE80211_C_MONITOR, 110 #ifdef IEEE80211_SUPPORT_MESH 111 [IEEE80211_M_MBSS] = IEEE80211_C_MBSS, 112 #endif 113 }; 114 115 const uint8_t ieee80211broadcastaddr[IEEE80211_ADDR_LEN] = 116 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 117 118 static void ieee80211_syncflag_locked(struct ieee80211com *ic, int flag); 119 static void ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag); 120 static void ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag); 121 static void ieee80211_syncflag_vht_locked(struct ieee80211com *ic, int flag); 122 static int ieee80211_media_setup(struct ieee80211com *ic, 123 struct ifmedia *media, int caps, int addsta, 124 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat); 125 static int media_status(enum ieee80211_opmode, 126 const struct ieee80211_channel *); 127 static uint64_t ieee80211_get_counter(struct ifnet *, ift_counter); 128 129 130 MALLOC_DEFINE(M_80211_VAP, "80211vap", "802.11 vap state"); 131 132 /* 133 * Default supported rates for 802.11 operation (in IEEE .5Mb units). 134 */ 135 #define B(r) ((r) | IEEE80211_RATE_BASIC) 136 static const struct ieee80211_rateset ieee80211_rateset_11a = 137 { 8, { B(12), 18, B(24), 36, B(48), 72, 96, 108 } }; 138 static const struct ieee80211_rateset ieee80211_rateset_half = 139 { 8, { B(6), 9, B(12), 18, B(24), 36, 48, 54 } }; 140 static const struct ieee80211_rateset ieee80211_rateset_quarter = 141 { 8, { B(3), 4, B(6), 9, B(12), 18, 24, 27 } }; 142 static const struct ieee80211_rateset ieee80211_rateset_11b = 143 { 4, { B(2), B(4), B(11), B(22) } }; 144 /* NB: OFDM rates are handled specially based on mode */ 145 static const struct ieee80211_rateset ieee80211_rateset_11g = 146 { 12, { B(2), B(4), B(11), B(22), 12, 18, 24, 36, 48, 72, 96, 108 } }; 147 #undef B 148 149 static int set_vht_extchan(struct ieee80211_channel *c); 150 151 /* 152 * Fill in 802.11 available channel set, mark 153 * all available channels as active, and pick 154 * a default channel if not already specified. 155 */ 156 void 157 ieee80211_chan_init(struct ieee80211com *ic) 158 { 159 #define DEFAULTRATES(m, def) do { \ 160 if (ic->ic_sup_rates[m].rs_nrates == 0) \ 161 ic->ic_sup_rates[m] = def; \ 162 } while (0) 163 struct ieee80211_channel *c; 164 int i; 165 166 KASSERT(0 < ic->ic_nchans && ic->ic_nchans <= IEEE80211_CHAN_MAX, 167 ("invalid number of channels specified: %u", ic->ic_nchans)); 168 memset(ic->ic_chan_avail, 0, sizeof(ic->ic_chan_avail)); 169 memset(ic->ic_modecaps, 0, sizeof(ic->ic_modecaps)); 170 setbit(ic->ic_modecaps, IEEE80211_MODE_AUTO); 171 for (i = 0; i < ic->ic_nchans; i++) { 172 c = &ic->ic_channels[i]; 173 KASSERT(c->ic_flags != 0, ("channel with no flags")); 174 /* 175 * Help drivers that work only with frequencies by filling 176 * in IEEE channel #'s if not already calculated. Note this 177 * mimics similar work done in ieee80211_setregdomain when 178 * changing regulatory state. 179 */ 180 if (c->ic_ieee == 0) 181 c->ic_ieee = ieee80211_mhz2ieee(c->ic_freq,c->ic_flags); 182 183 /* 184 * Setup the HT40/VHT40 upper/lower bits. 185 * The VHT80 math is done elsewhere. 186 */ 187 if (IEEE80211_IS_CHAN_HT40(c) && c->ic_extieee == 0) 188 c->ic_extieee = ieee80211_mhz2ieee(c->ic_freq + 189 (IEEE80211_IS_CHAN_HT40U(c) ? 20 : -20), 190 c->ic_flags); 191 192 /* Update VHT math */ 193 /* 194 * XXX VHT again, note that this assumes VHT80 channels 195 * are legit already 196 */ 197 set_vht_extchan(c); 198 199 /* default max tx power to max regulatory */ 200 if (c->ic_maxpower == 0) 201 c->ic_maxpower = 2*c->ic_maxregpower; 202 setbit(ic->ic_chan_avail, c->ic_ieee); 203 /* 204 * Identify mode capabilities. 205 */ 206 if (IEEE80211_IS_CHAN_A(c)) 207 setbit(ic->ic_modecaps, IEEE80211_MODE_11A); 208 if (IEEE80211_IS_CHAN_B(c)) 209 setbit(ic->ic_modecaps, IEEE80211_MODE_11B); 210 if (IEEE80211_IS_CHAN_ANYG(c)) 211 setbit(ic->ic_modecaps, IEEE80211_MODE_11G); 212 if (IEEE80211_IS_CHAN_FHSS(c)) 213 setbit(ic->ic_modecaps, IEEE80211_MODE_FH); 214 if (IEEE80211_IS_CHAN_108A(c)) 215 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_A); 216 if (IEEE80211_IS_CHAN_108G(c)) 217 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_G); 218 if (IEEE80211_IS_CHAN_ST(c)) 219 setbit(ic->ic_modecaps, IEEE80211_MODE_STURBO_A); 220 if (IEEE80211_IS_CHAN_HALF(c)) 221 setbit(ic->ic_modecaps, IEEE80211_MODE_HALF); 222 if (IEEE80211_IS_CHAN_QUARTER(c)) 223 setbit(ic->ic_modecaps, IEEE80211_MODE_QUARTER); 224 if (IEEE80211_IS_CHAN_HTA(c)) 225 setbit(ic->ic_modecaps, IEEE80211_MODE_11NA); 226 if (IEEE80211_IS_CHAN_HTG(c)) 227 setbit(ic->ic_modecaps, IEEE80211_MODE_11NG); 228 if (IEEE80211_IS_CHAN_VHTA(c)) 229 setbit(ic->ic_modecaps, IEEE80211_MODE_VHT_5GHZ); 230 if (IEEE80211_IS_CHAN_VHTG(c)) 231 setbit(ic->ic_modecaps, IEEE80211_MODE_VHT_2GHZ); 232 } 233 /* initialize candidate channels to all available */ 234 memcpy(ic->ic_chan_active, ic->ic_chan_avail, 235 sizeof(ic->ic_chan_avail)); 236 237 /* sort channel table to allow lookup optimizations */ 238 ieee80211_sort_channels(ic->ic_channels, ic->ic_nchans); 239 240 /* invalidate any previous state */ 241 ic->ic_bsschan = IEEE80211_CHAN_ANYC; 242 ic->ic_prevchan = NULL; 243 ic->ic_csa_newchan = NULL; 244 /* arbitrarily pick the first channel */ 245 ic->ic_curchan = &ic->ic_channels[0]; 246 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 247 248 /* fillin well-known rate sets if driver has not specified */ 249 DEFAULTRATES(IEEE80211_MODE_11B, ieee80211_rateset_11b); 250 DEFAULTRATES(IEEE80211_MODE_11G, ieee80211_rateset_11g); 251 DEFAULTRATES(IEEE80211_MODE_11A, ieee80211_rateset_11a); 252 DEFAULTRATES(IEEE80211_MODE_TURBO_A, ieee80211_rateset_11a); 253 DEFAULTRATES(IEEE80211_MODE_TURBO_G, ieee80211_rateset_11g); 254 DEFAULTRATES(IEEE80211_MODE_STURBO_A, ieee80211_rateset_11a); 255 DEFAULTRATES(IEEE80211_MODE_HALF, ieee80211_rateset_half); 256 DEFAULTRATES(IEEE80211_MODE_QUARTER, ieee80211_rateset_quarter); 257 DEFAULTRATES(IEEE80211_MODE_11NA, ieee80211_rateset_11a); 258 DEFAULTRATES(IEEE80211_MODE_11NG, ieee80211_rateset_11g); 259 DEFAULTRATES(IEEE80211_MODE_VHT_2GHZ, ieee80211_rateset_11g); 260 DEFAULTRATES(IEEE80211_MODE_VHT_5GHZ, ieee80211_rateset_11a); 261 262 /* 263 * Setup required information to fill the mcsset field, if driver did 264 * not. Assume a 2T2R setup for historic reasons. 265 */ 266 if (ic->ic_rxstream == 0) 267 ic->ic_rxstream = 2; 268 if (ic->ic_txstream == 0) 269 ic->ic_txstream = 2; 270 271 ieee80211_init_suphtrates(ic); 272 273 /* 274 * Set auto mode to reset active channel state and any desired channel. 275 */ 276 (void) ieee80211_setmode(ic, IEEE80211_MODE_AUTO); 277 #undef DEFAULTRATES 278 } 279 280 static void 281 null_update_mcast(struct ieee80211com *ic) 282 { 283 284 ic_printf(ic, "need multicast update callback\n"); 285 } 286 287 static void 288 null_update_promisc(struct ieee80211com *ic) 289 { 290 291 ic_printf(ic, "need promiscuous mode update callback\n"); 292 } 293 294 static void 295 null_update_chw(struct ieee80211com *ic) 296 { 297 298 ic_printf(ic, "%s: need callback\n", __func__); 299 } 300 301 #ifdef __FreeBSD__ 302 int 303 ic_printf(struct ieee80211com *ic, const char * fmt, ...) 304 { 305 va_list ap; 306 int retval; 307 308 retval = printf("%s: ", ic->ic_name); 309 va_start(ap, fmt); 310 retval += vprintf(fmt, ap); 311 va_end(ap); 312 return (retval); 313 } 314 #elif __NetBSD__ 315 void 316 ic_printf(struct ieee80211com *ic, const char * fmt, ...) 317 { 318 va_list ap; 319 320 printf("%s: ", ic->ic_name); 321 va_start(ap, fmt); 322 vprintf(fmt, ap); 323 va_end(ap); 324 } 325 #endif 326 327 static LIST_HEAD(, ieee80211com) ic_head = LIST_HEAD_INITIALIZER(ic_head); 328 #ifdef __FreeBSD__ 329 static struct mtx ic_list_mtx; 330 MTX_SYSINIT(ic_list, &ic_list_mtx, "ieee80211com list", MTX_DEF); 331 #elif __NetBSD__ 332 static kmutex_t ic_list_mtx; 333 #endif 334 335 #if notyet 336 static int 337 sysctl_ieee80211coms(SYSCTL_HANDLER_ARGS) 338 { 339 struct ieee80211com *ic; 340 struct sbuf sb; 341 char *sp; 342 int error; 343 344 error = sysctl_wire_old_buffer(req, 0); 345 if (error) 346 return (error); 347 sbuf_new_for_sysctl(&sb, NULL, 8, req); 348 sbuf_clear_flags(&sb, SBUF_INCLUDENUL); 349 sp = ""; 350 mtx_lock(&ic_list_mtx); 351 LIST_FOREACH(ic, &ic_head, ic_next) { 352 sbuf_printf(&sb, "%s%s", sp, ic->ic_name); 353 sp = " "; 354 } 355 mtx_unlock(&ic_list_mtx); 356 error = sbuf_finish(&sb); 357 sbuf_delete(&sb); 358 return (error); 359 } 360 361 SYSCTL_PROC(_net_wlan, OID_AUTO, devices, 362 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, 363 sysctl_ieee80211coms, "A", "names of available 802.11 devices"); 364 #endif 365 366 /* 367 * Attach/setup the common net80211 state. Called by 368 * the driver on attach to prior to creating any vap's. 369 */ 370 void 371 ieee80211_ifattach(struct ieee80211com *ic) 372 { 373 374 IEEE80211_LOCK_INIT(ic, ic->ic_name); 375 IEEE80211_TX_LOCK_INIT(ic, ic->ic_name); 376 TAILQ_INIT(&ic->ic_vaps); 377 378 #ifdef notyet 379 /* Create a taskqueue for all state changes */ 380 ic->ic_tq = taskqueue_create("ic_taskq", M_WAITOK | M_ZERO, 381 taskqueue_thread_enqueue, &ic->ic_tq); 382 taskqueue_start_threads(&ic->ic_tq, 1, PI_NET, "%s net80211 taskq", 383 ic->ic_name); 384 ic->ic_ierrors = counter_u64_alloc(M_WAITOK); 385 ic->ic_oerrors = counter_u64_alloc(M_WAITOK); 386 #endif 387 /* 388 * Fill in 802.11 available channel set, mark all 389 * available channels as active, and pick a default 390 * channel if not already specified. 391 */ 392 ieee80211_chan_init(ic); 393 394 ic->ic_update_mcast = null_update_mcast; 395 ic->ic_update_promisc = null_update_promisc; 396 ic->ic_update_chw = null_update_chw; 397 398 ic->ic_hash_key = arc4random(); 399 ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT; 400 ic->ic_lintval = ic->ic_bintval; 401 ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX; 402 403 ieee80211_crypto_attach(ic); 404 ieee80211_node_attach(ic); 405 ieee80211_power_attach(ic); 406 ieee80211_proto_attach(ic); 407 #ifdef IEEE80211_SUPPORT_SUPERG 408 ieee80211_superg_attach(ic); 409 #endif 410 ieee80211_ht_attach(ic); 411 ieee80211_vht_attach(ic); 412 ieee80211_scan_attach(ic); 413 ieee80211_regdomain_attach(ic); 414 ieee80211_dfs_attach(ic); 415 416 ieee80211_sysctl_attach(ic); 417 418 mtx_lock(&ic_list_mtx); 419 LIST_INSERT_HEAD(&ic_head, ic, ic_next); 420 mtx_unlock(&ic_list_mtx); 421 } 422 423 /* 424 * Detach net80211 state on device detach. Tear down 425 * all vap's and reclaim all common state prior to the 426 * device state going away. Note we may call back into 427 * driver; it must be prepared for this. 428 */ 429 void 430 ieee80211_ifdetach(struct ieee80211com *ic) 431 { 432 struct ieee80211vap *vap; 433 434 mtx_lock(&ic_list_mtx); 435 LIST_REMOVE(ic, ic_next); 436 mtx_unlock(&ic_list_mtx); 437 438 taskqueue_drain(taskqueue_thread, &ic->ic_restart_task); 439 440 /* 441 * The VAP is responsible for setting and clearing 442 * the VIMAGE context. 443 */ 444 while ((vap = TAILQ_FIRST(&ic->ic_vaps)) != NULL) 445 ieee80211_vap_destroy(vap); 446 ieee80211_waitfor_parent(ic); 447 448 ieee80211_sysctl_detach(ic); 449 ieee80211_dfs_detach(ic); 450 ieee80211_regdomain_detach(ic); 451 ieee80211_scan_detach(ic); 452 #ifdef IEEE80211_SUPPORT_SUPERG 453 ieee80211_superg_detach(ic); 454 #endif 455 ieee80211_vht_detach(ic); 456 ieee80211_ht_detach(ic); 457 /* NB: must be called before ieee80211_node_detach */ 458 ieee80211_proto_detach(ic); 459 ieee80211_crypto_detach(ic); 460 ieee80211_power_detach(ic); 461 ieee80211_node_detach(ic); 462 463 counter_u64_free(ic->ic_ierrors); 464 counter_u64_free(ic->ic_oerrors); 465 466 taskqueue_free(ic->ic_tq); 467 IEEE80211_TX_LOCK_DESTROY(ic); 468 IEEE80211_LOCK_DESTROY(ic); 469 } 470 471 struct ieee80211com * 472 ieee80211_find_com(const char *name) 473 { 474 struct ieee80211com *ic; 475 476 mtx_lock(&ic_list_mtx); 477 LIST_FOREACH(ic, &ic_head, ic_next) 478 if (strcmp(ic->ic_name, name) == 0) 479 break; 480 mtx_unlock(&ic_list_mtx); 481 482 return (ic); 483 } 484 485 void 486 ieee80211_iterate_coms(ieee80211_com_iter_func *f, void *arg) 487 { 488 struct ieee80211com *ic; 489 490 mtx_lock(&ic_list_mtx); 491 LIST_FOREACH(ic, &ic_head, ic_next) 492 (*f)(arg, ic); 493 mtx_unlock(&ic_list_mtx); 494 } 495 496 /* 497 * Default reset method for use with the ioctl support. This 498 * method is invoked after any state change in the 802.11 499 * layer that should be propagated to the hardware but not 500 * require re-initialization of the 802.11 state machine (e.g 501 * rescanning for an ap). We always return ENETRESET which 502 * should cause the driver to re-initialize the device. Drivers 503 * can override this method to implement more optimized support. 504 */ 505 static int 506 default_reset(struct ieee80211vap *vap, u_long cmd) 507 { 508 return ENETRESET; 509 } 510 511 /* 512 * Default for updating the VAP default TX key index. 513 * 514 * Drivers that support TX offload as well as hardware encryption offload 515 * may need to be informed of key index changes separate from the key 516 * update. 517 */ 518 static void 519 default_update_deftxkey(struct ieee80211vap *vap, ieee80211_keyix kid) 520 { 521 522 /* XXX assert validity */ 523 /* XXX assert we're in a key update block */ 524 vap->iv_def_txkey = kid; 525 } 526 527 /* 528 * Add underlying device errors to vap errors. 529 */ 530 static __unused uint64_t 531 ieee80211_get_counter(struct ifnet *ifp, ift_counter cnt) 532 { 533 struct ieee80211vap *vap = ifp->if_softc; 534 struct ieee80211com *ic = vap->iv_ic; 535 uint64_t rv; 536 537 rv = if_get_counter_default(ifp, cnt); 538 switch (cnt) { 539 case IFCOUNTER_OERRORS: 540 rv += counter_u64_fetch(ic->ic_oerrors); 541 break; 542 case IFCOUNTER_IERRORS: 543 rv += counter_u64_fetch(ic->ic_ierrors); 544 break; 545 default: 546 break; 547 } 548 549 return (rv); 550 } 551 552 /* 553 * Prepare a vap for use. Drivers use this call to 554 * setup net80211 state in new vap's prior attaching 555 * them with ieee80211_vap_attach (below). 556 */ 557 int 558 ieee80211_vap_setup(struct ieee80211com *ic, struct ieee80211vap *vap, 559 const char name[IFNAMSIZ], int unit, enum ieee80211_opmode opmode, 560 int flags, const uint8_t bssid[IEEE80211_ADDR_LEN]) 561 { 562 struct ifnet *ifp; 563 564 ifp = if_alloc(IFT_ETHER); 565 if (ifp == NULL) { 566 ic_printf(ic, "%s: unable to allocate ifnet\n", 567 __func__); 568 return ENOMEM; 569 } 570 if_initname(ifp, name, unit); 571 ifp->if_softc = vap; /* back pointer */ 572 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 573 ifp->if_transmit = ieee80211_vap_transmit; 574 #ifdef __FreeBSD__ 575 ifp->if_qflush = ieee80211_vap_qflush; 576 #endif 577 #ifdef notyet 578 ifp->if_ioctl = ieee80211_ioctl; 579 ifp->if_init = ieee80211_init; 580 #endif 581 #ifdef __FreeBSD__ 582 ifp->if_get_counter = ieee80211_get_counter; 583 #endif 584 585 vap->iv_ifp = ifp; 586 vap->iv_ic = ic; 587 vap->iv_flags = ic->ic_flags; /* propagate common flags */ 588 vap->iv_flags_ext = ic->ic_flags_ext; 589 vap->iv_flags_ven = ic->ic_flags_ven; 590 vap->iv_caps = ic->ic_caps &~ IEEE80211_C_OPMODE; 591 592 /* 11n capabilities - XXX methodize */ 593 vap->iv_htcaps = ic->ic_htcaps; 594 vap->iv_htextcaps = ic->ic_htextcaps; 595 596 /* 11ac capabilities - XXX methodize */ 597 vap->iv_vhtcaps = ic->ic_vhtcaps; 598 vap->iv_vhtextcaps = ic->ic_vhtextcaps; 599 600 vap->iv_opmode = opmode; 601 vap->iv_caps |= ieee80211_opcap[opmode]; 602 IEEE80211_ADDR_COPY(vap->iv_myaddr, ic->ic_macaddr); 603 switch (opmode) { 604 case IEEE80211_M_WDS: 605 /* 606 * WDS links must specify the bssid of the far end. 607 * For legacy operation this is a static relationship. 608 * For non-legacy operation the station must associate 609 * and be authorized to pass traffic. Plumbing the 610 * vap to the proper node happens when the vap 611 * transitions to RUN state. 612 */ 613 IEEE80211_ADDR_COPY(vap->iv_des_bssid, bssid); 614 vap->iv_flags |= IEEE80211_F_DESBSSID; 615 if (flags & IEEE80211_CLONE_WDSLEGACY) 616 vap->iv_flags_ext |= IEEE80211_FEXT_WDSLEGACY; 617 break; 618 #ifdef IEEE80211_SUPPORT_TDMA 619 case IEEE80211_M_AHDEMO: 620 if (flags & IEEE80211_CLONE_TDMA) { 621 /* NB: checked before clone operation allowed */ 622 KASSERT(ic->ic_caps & IEEE80211_C_TDMA, 623 ("not TDMA capable, ic_caps 0x%x", ic->ic_caps)); 624 /* 625 * Propagate TDMA capability to mark vap; this 626 * cannot be removed and is used to distinguish 627 * regular ahdemo operation from ahdemo+tdma. 628 */ 629 vap->iv_caps |= IEEE80211_C_TDMA; 630 } 631 break; 632 #endif 633 default: 634 break; 635 } 636 /* auto-enable s/w beacon miss support */ 637 if (flags & IEEE80211_CLONE_NOBEACONS) 638 vap->iv_flags_ext |= IEEE80211_FEXT_SWBMISS; 639 /* auto-generated or user supplied MAC address */ 640 if (flags & (IEEE80211_CLONE_BSSID|IEEE80211_CLONE_MACADDR)) 641 vap->iv_flags_ext |= IEEE80211_FEXT_UNIQMAC; 642 /* 643 * Enable various functionality by default if we're 644 * capable; the driver can override us if it knows better. 645 */ 646 if (vap->iv_caps & IEEE80211_C_WME) 647 vap->iv_flags |= IEEE80211_F_WME; 648 if (vap->iv_caps & IEEE80211_C_BURST) 649 vap->iv_flags |= IEEE80211_F_BURST; 650 /* NB: bg scanning only makes sense for station mode right now */ 651 if (vap->iv_opmode == IEEE80211_M_STA && 652 (vap->iv_caps & IEEE80211_C_BGSCAN)) 653 vap->iv_flags |= IEEE80211_F_BGSCAN; 654 vap->iv_flags |= IEEE80211_F_DOTH; /* XXX no cap, just ena */ 655 /* NB: DFS support only makes sense for ap mode right now */ 656 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 657 (vap->iv_caps & IEEE80211_C_DFS)) 658 vap->iv_flags_ext |= IEEE80211_FEXT_DFS; 659 660 vap->iv_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */ 661 vap->iv_bmissthreshold = IEEE80211_HWBMISS_DEFAULT; 662 vap->iv_dtim_period = IEEE80211_DTIM_DEFAULT; 663 /* 664 * Install a default reset method for the ioctl support; 665 * the driver can override this. 666 */ 667 vap->iv_reset = default_reset; 668 669 /* 670 * Install a default crypto key update method, the driver 671 * can override this. 672 */ 673 vap->iv_update_deftxkey = default_update_deftxkey; 674 675 ieee80211_sysctl_vattach(vap); 676 ieee80211_crypto_vattach(vap); 677 ieee80211_node_vattach(vap); 678 ieee80211_power_vattach(vap); 679 ieee80211_proto_vattach(vap); 680 #ifdef IEEE80211_SUPPORT_SUPERG 681 ieee80211_superg_vattach(vap); 682 #endif 683 ieee80211_ht_vattach(vap); 684 ieee80211_vht_vattach(vap); 685 ieee80211_scan_vattach(vap); 686 ieee80211_regdomain_vattach(vap); 687 ieee80211_radiotap_vattach(vap); 688 ieee80211_ratectl_set(vap, IEEE80211_RATECTL_NONE); 689 690 return 0; 691 } 692 693 /* 694 * Activate a vap. State should have been prepared with a 695 * call to ieee80211_vap_setup and by the driver. On return 696 * from this call the vap is ready for use. 697 */ 698 int 699 ieee80211_vap_attach(struct ieee80211vap *vap, ifm_change_cb_t media_change, 700 ifm_stat_cb_t media_stat, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 701 { 702 struct ifnet *ifp = vap->iv_ifp; 703 struct ieee80211com *ic = vap->iv_ic; 704 struct ifmediareq imr; 705 int maxrate; 706 707 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 708 "%s: %s parent %s flags 0x%x flags_ext 0x%x\n", 709 __func__, ieee80211_opmode_name[vap->iv_opmode], 710 ic->ic_name, vap->iv_flags, vap->iv_flags_ext); 711 712 /* 713 * Do late attach work that cannot happen until after 714 * the driver has had a chance to override defaults. 715 */ 716 ieee80211_node_latevattach(vap); 717 ieee80211_power_latevattach(vap); 718 719 maxrate = ieee80211_media_setup(ic, &vap->iv_media, vap->iv_caps, 720 vap->iv_opmode == IEEE80211_M_STA, media_change, media_stat); 721 ieee80211_media_status(ifp, &imr); 722 /* NB: strip explicit mode; we're actually in autoselect */ 723 ifmedia_set(&vap->iv_media, 724 imr.ifm_active &~ (IFM_MMASK | IFM_IEEE80211_TURBO)); 725 if (maxrate) 726 ifp->if_baudrate = IF_Mbps(maxrate); 727 728 ether_ifattach(ifp, macaddr); 729 IEEE80211_ADDR_COPY(vap->iv_myaddr, IF_LLADDR(ifp)); 730 /* hook output method setup by ether_ifattach */ 731 #ifdef notyet 732 vap->iv_output = ifp->if_output; 733 ifp->if_output = ieee80211_output; 734 #endif 735 /* NB: if_mtu set by ether_ifattach to ETHERMTU */ 736 737 IEEE80211_LOCK(ic); 738 TAILQ_INSERT_TAIL(&ic->ic_vaps, vap, iv_next); 739 ieee80211_syncflag_locked(ic, IEEE80211_F_WME); 740 #ifdef IEEE80211_SUPPORT_SUPERG 741 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); 742 #endif 743 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); 744 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); 745 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT); 746 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40); 747 748 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_VHT); 749 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT40); 750 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT80); 751 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT80P80); 752 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT160); 753 IEEE80211_UNLOCK(ic); 754 755 return 1; 756 } 757 758 /* 759 * Tear down vap state and reclaim the ifnet. 760 * The driver is assumed to have prepared for 761 * this; e.g. by turning off interrupts for the 762 * underlying device. 763 */ 764 void 765 ieee80211_vap_detach(struct ieee80211vap *vap) 766 { 767 struct ieee80211com *ic = vap->iv_ic; 768 struct ifnet *ifp = vap->iv_ifp; 769 770 CURVNET_SET(ifp->if_vnet); 771 772 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s parent %s\n", 773 __func__, ieee80211_opmode_name[vap->iv_opmode], ic->ic_name); 774 775 /* NB: bpfdetach is called by ether_ifdetach and claims all taps */ 776 ether_ifdetach(ifp); 777 778 ieee80211_stop(vap); 779 780 /* 781 * Flush any deferred vap tasks. 782 */ 783 ieee80211_draintask(ic, &vap->iv_nstate_task); 784 ieee80211_draintask(ic, &vap->iv_swbmiss_task); 785 ieee80211_draintask(ic, &vap->iv_wme_task); 786 ieee80211_draintask(ic, &ic->ic_parent_task); 787 788 /* XXX band-aid until ifnet handles this for us */ 789 taskqueue_drain(taskqueue_swi, &ifp->if_linktask); 790 791 IEEE80211_LOCK(ic); 792 KASSERT(vap->iv_state == IEEE80211_S_INIT , ("vap still running")); 793 TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next); 794 ieee80211_syncflag_locked(ic, IEEE80211_F_WME); 795 #ifdef IEEE80211_SUPPORT_SUPERG 796 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); 797 #endif 798 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); 799 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); 800 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT); 801 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40); 802 803 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_VHT); 804 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT40); 805 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT80); 806 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT80P80); 807 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT160); 808 809 /* NB: this handles the bpfdetach done below */ 810 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_BPF); 811 if (vap->iv_ifflags & IFF_PROMISC) 812 ieee80211_promisc(vap, false); 813 if (vap->iv_ifflags & IFF_ALLMULTI) 814 ieee80211_allmulti(vap, false); 815 IEEE80211_UNLOCK(ic); 816 817 ifmedia_removeall(&vap->iv_media); 818 819 ieee80211_radiotap_vdetach(vap); 820 ieee80211_regdomain_vdetach(vap); 821 ieee80211_scan_vdetach(vap); 822 #ifdef IEEE80211_SUPPORT_SUPERG 823 ieee80211_superg_vdetach(vap); 824 #endif 825 ieee80211_vht_vdetach(vap); 826 ieee80211_ht_vdetach(vap); 827 /* NB: must be before ieee80211_node_vdetach */ 828 ieee80211_proto_vdetach(vap); 829 ieee80211_crypto_vdetach(vap); 830 ieee80211_power_vdetach(vap); 831 ieee80211_node_vdetach(vap); 832 ieee80211_sysctl_vdetach(vap); 833 834 if_free(ifp); 835 836 CURVNET_RESTORE(); 837 } 838 839 /* 840 * Count number of vaps in promisc, and issue promisc on 841 * parent respectively. 842 */ 843 void 844 ieee80211_promisc(struct ieee80211vap *vap, bool on) 845 { 846 struct ieee80211com *ic = vap->iv_ic; 847 848 IEEE80211_LOCK_ASSERT(ic); 849 850 if (on) { 851 if (++ic->ic_promisc == 1) 852 ieee80211_runtask(ic, &ic->ic_promisc_task); 853 } else { 854 KASSERT(ic->ic_promisc > 0, ("%s: ic %p not promisc", 855 __func__, ic)); 856 if (--ic->ic_promisc == 0) 857 ieee80211_runtask(ic, &ic->ic_promisc_task); 858 } 859 } 860 861 /* 862 * Count number of vaps in allmulti, and issue allmulti on 863 * parent respectively. 864 */ 865 void 866 ieee80211_allmulti(struct ieee80211vap *vap, bool on) 867 { 868 struct ieee80211com *ic = vap->iv_ic; 869 870 IEEE80211_LOCK_ASSERT(ic); 871 872 if (on) { 873 if (++ic->ic_allmulti == 1) 874 ieee80211_runtask(ic, &ic->ic_mcast_task); 875 } else { 876 KASSERT(ic->ic_allmulti > 0, ("%s: ic %p not allmulti", 877 __func__, ic)); 878 if (--ic->ic_allmulti == 0) 879 ieee80211_runtask(ic, &ic->ic_mcast_task); 880 } 881 } 882 883 /* 884 * Synchronize flag bit state in the com structure 885 * according to the state of all vap's. This is used, 886 * for example, to handle state changes via ioctls. 887 */ 888 static void 889 ieee80211_syncflag_locked(struct ieee80211com *ic, int flag) 890 { 891 struct ieee80211vap *vap; 892 int bit; 893 894 IEEE80211_LOCK_ASSERT(ic); 895 896 bit = 0; 897 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 898 if (vap->iv_flags & flag) { 899 bit = 1; 900 break; 901 } 902 if (bit) 903 ic->ic_flags |= flag; 904 else 905 ic->ic_flags &= ~flag; 906 } 907 908 void 909 ieee80211_syncflag(struct ieee80211vap *vap, int flag) 910 { 911 struct ieee80211com *ic = vap->iv_ic; 912 913 IEEE80211_LOCK(ic); 914 if (flag < 0) { 915 flag = -flag; 916 vap->iv_flags &= ~flag; 917 } else 918 vap->iv_flags |= flag; 919 ieee80211_syncflag_locked(ic, flag); 920 IEEE80211_UNLOCK(ic); 921 } 922 923 /* 924 * Synchronize flags_ht bit state in the com structure 925 * according to the state of all vap's. This is used, 926 * for example, to handle state changes via ioctls. 927 */ 928 static void 929 ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag) 930 { 931 struct ieee80211vap *vap; 932 int bit; 933 934 IEEE80211_LOCK_ASSERT(ic); 935 936 bit = 0; 937 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 938 if (vap->iv_flags_ht & flag) { 939 bit = 1; 940 break; 941 } 942 if (bit) 943 ic->ic_flags_ht |= flag; 944 else 945 ic->ic_flags_ht &= ~flag; 946 } 947 948 void 949 ieee80211_syncflag_ht(struct ieee80211vap *vap, int flag) 950 { 951 struct ieee80211com *ic = vap->iv_ic; 952 953 IEEE80211_LOCK(ic); 954 if (flag < 0) { 955 flag = -flag; 956 vap->iv_flags_ht &= ~flag; 957 } else 958 vap->iv_flags_ht |= flag; 959 ieee80211_syncflag_ht_locked(ic, flag); 960 IEEE80211_UNLOCK(ic); 961 } 962 963 /* 964 * Synchronize flags_vht bit state in the com structure 965 * according to the state of all vap's. This is used, 966 * for example, to handle state changes via ioctls. 967 */ 968 static void 969 ieee80211_syncflag_vht_locked(struct ieee80211com *ic, int flag) 970 { 971 struct ieee80211vap *vap; 972 int bit; 973 974 IEEE80211_LOCK_ASSERT(ic); 975 976 bit = 0; 977 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 978 if (vap->iv_flags_vht & flag) { 979 bit = 1; 980 break; 981 } 982 if (bit) 983 ic->ic_flags_vht |= flag; 984 else 985 ic->ic_flags_vht &= ~flag; 986 } 987 988 void 989 ieee80211_syncflag_vht(struct ieee80211vap *vap, int flag) 990 { 991 struct ieee80211com *ic = vap->iv_ic; 992 993 IEEE80211_LOCK(ic); 994 if (flag < 0) { 995 flag = -flag; 996 vap->iv_flags_vht &= ~flag; 997 } else 998 vap->iv_flags_vht |= flag; 999 ieee80211_syncflag_vht_locked(ic, flag); 1000 IEEE80211_UNLOCK(ic); 1001 } 1002 1003 /* 1004 * Synchronize flags_ext bit state in the com structure 1005 * according to the state of all vap's. This is used, 1006 * for example, to handle state changes via ioctls. 1007 */ 1008 static void 1009 ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag) 1010 { 1011 struct ieee80211vap *vap; 1012 int bit; 1013 1014 IEEE80211_LOCK_ASSERT(ic); 1015 1016 bit = 0; 1017 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1018 if (vap->iv_flags_ext & flag) { 1019 bit = 1; 1020 break; 1021 } 1022 if (bit) 1023 ic->ic_flags_ext |= flag; 1024 else 1025 ic->ic_flags_ext &= ~flag; 1026 } 1027 1028 void 1029 ieee80211_syncflag_ext(struct ieee80211vap *vap, int flag) 1030 { 1031 struct ieee80211com *ic = vap->iv_ic; 1032 1033 IEEE80211_LOCK(ic); 1034 if (flag < 0) { 1035 flag = -flag; 1036 vap->iv_flags_ext &= ~flag; 1037 } else 1038 vap->iv_flags_ext |= flag; 1039 ieee80211_syncflag_ext_locked(ic, flag); 1040 IEEE80211_UNLOCK(ic); 1041 } 1042 1043 static __inline int 1044 mapgsm(u_int freq, u_int flags) 1045 { 1046 freq *= 10; 1047 if (flags & IEEE80211_CHAN_QUARTER) 1048 freq += 5; 1049 else if (flags & IEEE80211_CHAN_HALF) 1050 freq += 10; 1051 else 1052 freq += 20; 1053 /* NB: there is no 907/20 wide but leave room */ 1054 return (freq - 906*10) / 5; 1055 } 1056 1057 static __inline int 1058 mappsb(u_int freq, u_int flags) 1059 { 1060 return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5; 1061 } 1062 1063 /* 1064 * Convert MHz frequency to IEEE channel number. 1065 */ 1066 int 1067 ieee80211_mhz2ieee(u_int freq, u_int flags) 1068 { 1069 #define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990) 1070 if (flags & IEEE80211_CHAN_GSM) 1071 return mapgsm(freq, flags); 1072 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 1073 if (freq == 2484) 1074 return 14; 1075 if (freq < 2484) 1076 return ((int) freq - 2407) / 5; 1077 else 1078 return 15 + ((freq - 2512) / 20); 1079 } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */ 1080 if (freq <= 5000) { 1081 /* XXX check regdomain? */ 1082 if (IS_FREQ_IN_PSB(freq)) 1083 return mappsb(freq, flags); 1084 return (freq - 4000) / 5; 1085 } else 1086 return (freq - 5000) / 5; 1087 } else { /* either, guess */ 1088 if (freq == 2484) 1089 return 14; 1090 if (freq < 2484) { 1091 if (907 <= freq && freq <= 922) 1092 return mapgsm(freq, flags); 1093 return ((int) freq - 2407) / 5; 1094 } 1095 if (freq < 5000) { 1096 if (IS_FREQ_IN_PSB(freq)) 1097 return mappsb(freq, flags); 1098 else if (freq > 4900) 1099 return (freq - 4000) / 5; 1100 else 1101 return 15 + ((freq - 2512) / 20); 1102 } 1103 return (freq - 5000) / 5; 1104 } 1105 #undef IS_FREQ_IN_PSB 1106 } 1107 1108 /* 1109 * Convert channel to IEEE channel number. 1110 */ 1111 int 1112 ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c) 1113 { 1114 if (c == NULL) { 1115 ic_printf(ic, "invalid channel (NULL)\n"); 1116 return 0; /* XXX */ 1117 } 1118 return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee); 1119 } 1120 1121 /* 1122 * Convert IEEE channel number to MHz frequency. 1123 */ 1124 u_int 1125 ieee80211_ieee2mhz(u_int chan, u_int flags) 1126 { 1127 if (flags & IEEE80211_CHAN_GSM) 1128 return 907 + 5 * (chan / 10); 1129 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 1130 if (chan == 14) 1131 return 2484; 1132 if (chan < 14) 1133 return 2407 + chan*5; 1134 else 1135 return 2512 + ((chan-15)*20); 1136 } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */ 1137 if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) { 1138 chan -= 37; 1139 return 4940 + chan*5 + (chan % 5 ? 2 : 0); 1140 } 1141 return 5000 + (chan*5); 1142 } else { /* either, guess */ 1143 /* XXX can't distinguish PSB+GSM channels */ 1144 if (chan == 14) 1145 return 2484; 1146 if (chan < 14) /* 0-13 */ 1147 return 2407 + chan*5; 1148 if (chan < 27) /* 15-26 */ 1149 return 2512 + ((chan-15)*20); 1150 return 5000 + (chan*5); 1151 } 1152 } 1153 1154 static __inline void 1155 set_extchan(struct ieee80211_channel *c) 1156 { 1157 1158 /* 1159 * IEEE Std 802.11-2012, page 1738, subclause 20.3.15.4: 1160 * "the secondary channel number shall be 'N + [1,-1] * 4' 1161 */ 1162 if (c->ic_flags & IEEE80211_CHAN_HT40U) 1163 c->ic_extieee = c->ic_ieee + 4; 1164 else if (c->ic_flags & IEEE80211_CHAN_HT40D) 1165 c->ic_extieee = c->ic_ieee - 4; 1166 else 1167 c->ic_extieee = 0; 1168 } 1169 1170 /* 1171 * Populate the freq1/freq2 fields as appropriate for VHT channels. 1172 * 1173 * This for now uses a hard-coded list of 80MHz wide channels. 1174 * 1175 * For HT20/HT40, freq1 just is the centre frequency of the 40MHz 1176 * wide channel we've already decided upon. 1177 * 1178 * For VHT80 and VHT160, there are only a small number of fixed 1179 * 80/160MHz wide channels, so we just use those. 1180 * 1181 * This is all likely very very wrong - both the regulatory code 1182 * and this code needs to ensure that all four channels are 1183 * available and valid before the VHT80 (and eight for VHT160) channel 1184 * is created. 1185 */ 1186 1187 struct vht_chan_range { 1188 uint16_t freq_start; 1189 uint16_t freq_end; 1190 }; 1191 1192 struct vht_chan_range vht80_chan_ranges[] = { 1193 { 5170, 5250 }, 1194 { 5250, 5330 }, 1195 { 5490, 5570 }, 1196 { 5570, 5650 }, 1197 { 5650, 5730 }, 1198 { 5735, 5815 }, 1199 { 0, 0, } 1200 }; 1201 1202 static int 1203 set_vht_extchan(struct ieee80211_channel *c) 1204 { 1205 int i; 1206 1207 if (! IEEE80211_IS_CHAN_VHT(c)) { 1208 return (0); 1209 } 1210 1211 if (IEEE80211_IS_CHAN_VHT20(c)) { 1212 c->ic_vht_ch_freq1 = c->ic_ieee; 1213 return (1); 1214 } 1215 1216 if (IEEE80211_IS_CHAN_VHT40(c)) { 1217 if (IEEE80211_IS_CHAN_HT40U(c)) 1218 c->ic_vht_ch_freq1 = c->ic_ieee + 2; 1219 else if (IEEE80211_IS_CHAN_HT40D(c)) 1220 c->ic_vht_ch_freq1 = c->ic_ieee - 2; 1221 else 1222 return (0); 1223 return (1); 1224 } 1225 1226 if (IEEE80211_IS_CHAN_VHT80(c)) { 1227 for (i = 0; vht80_chan_ranges[i].freq_start != 0; i++) { 1228 if (c->ic_freq >= vht80_chan_ranges[i].freq_start && 1229 c->ic_freq < vht80_chan_ranges[i].freq_end) { 1230 int midpoint; 1231 1232 midpoint = vht80_chan_ranges[i].freq_start + 40; 1233 c->ic_vht_ch_freq1 = 1234 ieee80211_mhz2ieee(midpoint, c->ic_flags); 1235 c->ic_vht_ch_freq2 = 0; 1236 #if 0 1237 printf("%s: %d, freq=%d, midpoint=%d, freq1=%d, freq2=%d\n", 1238 __func__, c->ic_ieee, c->ic_freq, midpoint, 1239 c->ic_vht_ch_freq1, c->ic_vht_ch_freq2); 1240 #endif 1241 return (1); 1242 } 1243 } 1244 return (0); 1245 } 1246 1247 printf("%s: unknown VHT channel type (ieee=%d, flags=0x%08x)\n", 1248 __func__, 1249 c->ic_ieee, 1250 c->ic_flags); 1251 1252 return (0); 1253 } 1254 1255 /* 1256 * Return whether the current channel could possibly be a part of 1257 * a VHT80 channel. 1258 * 1259 * This doesn't check that the whole range is in the allowed list 1260 * according to regulatory. 1261 */ 1262 static int 1263 is_vht80_valid_freq(uint16_t freq) 1264 { 1265 int i; 1266 for (i = 0; vht80_chan_ranges[i].freq_start != 0; i++) { 1267 if (freq >= vht80_chan_ranges[i].freq_start && 1268 freq < vht80_chan_ranges[i].freq_end) 1269 return (1); 1270 } 1271 return (0); 1272 } 1273 1274 static int 1275 addchan(struct ieee80211_channel chans[], int maxchans, int *nchans, 1276 uint8_t ieee, uint16_t freq, int8_t maxregpower, uint32_t flags) 1277 { 1278 struct ieee80211_channel *c; 1279 1280 if (*nchans >= maxchans) 1281 return (ENOBUFS); 1282 1283 #if 0 1284 printf("%s: %d: ieee=%d, freq=%d, flags=0x%08x\n", 1285 __func__, 1286 *nchans, 1287 ieee, 1288 freq, 1289 flags); 1290 #endif 1291 1292 c = &chans[(*nchans)++]; 1293 c->ic_ieee = ieee; 1294 c->ic_freq = freq != 0 ? freq : ieee80211_ieee2mhz(ieee, flags); 1295 c->ic_maxregpower = maxregpower; 1296 c->ic_maxpower = 2 * maxregpower; 1297 c->ic_flags = flags; 1298 c->ic_vht_ch_freq1 = 0; 1299 c->ic_vht_ch_freq2 = 0; 1300 set_extchan(c); 1301 set_vht_extchan(c); 1302 1303 return (0); 1304 } 1305 1306 static int 1307 copychan_prev(struct ieee80211_channel chans[], int maxchans, int *nchans, 1308 uint32_t flags) 1309 { 1310 struct ieee80211_channel *c; 1311 1312 KASSERT(*nchans > 0, ("channel list is empty\n")); 1313 1314 if (*nchans >= maxchans) 1315 return (ENOBUFS); 1316 1317 #if 0 1318 printf("%s: %d: flags=0x%08x\n", 1319 __func__, 1320 *nchans, 1321 flags); 1322 #endif 1323 1324 c = &chans[(*nchans)++]; 1325 c[0] = c[-1]; 1326 c->ic_flags = flags; 1327 c->ic_vht_ch_freq1 = 0; 1328 c->ic_vht_ch_freq2 = 0; 1329 set_extchan(c); 1330 set_vht_extchan(c); 1331 1332 return (0); 1333 } 1334 1335 /* 1336 * XXX VHT-2GHz 1337 */ 1338 static void 1339 getflags_2ghz(const uint8_t bands[], uint32_t flags[], int ht40) 1340 { 1341 int nmodes; 1342 1343 nmodes = 0; 1344 if (isset(bands, IEEE80211_MODE_11B)) 1345 flags[nmodes++] = IEEE80211_CHAN_B; 1346 if (isset(bands, IEEE80211_MODE_11G)) 1347 flags[nmodes++] = IEEE80211_CHAN_G; 1348 if (isset(bands, IEEE80211_MODE_11NG)) 1349 flags[nmodes++] = IEEE80211_CHAN_G | IEEE80211_CHAN_HT20; 1350 if (ht40) { 1351 flags[nmodes++] = IEEE80211_CHAN_G | IEEE80211_CHAN_HT40U; 1352 flags[nmodes++] = IEEE80211_CHAN_G | IEEE80211_CHAN_HT40D; 1353 } 1354 flags[nmodes] = 0; 1355 } 1356 1357 static void 1358 getflags_5ghz(const uint8_t bands[], uint32_t flags[], int ht40, int vht80) 1359 { 1360 int nmodes; 1361 1362 /* 1363 * the addchan_list function seems to expect the flags array to 1364 * be in channel width order, so the VHT bits are interspersed 1365 * as appropriate to maintain said order. 1366 * 1367 * It also assumes HT40U is before HT40D. 1368 */ 1369 nmodes = 0; 1370 1371 /* 20MHz */ 1372 if (isset(bands, IEEE80211_MODE_11A)) 1373 flags[nmodes++] = IEEE80211_CHAN_A; 1374 if (isset(bands, IEEE80211_MODE_11NA)) 1375 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT20; 1376 if (isset(bands, IEEE80211_MODE_VHT_5GHZ)) { 1377 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT20 | 1378 IEEE80211_CHAN_VHT20; 1379 } 1380 1381 /* 40MHz */ 1382 if (ht40) { 1383 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT40U; 1384 } 1385 if (ht40 && isset(bands, IEEE80211_MODE_VHT_5GHZ)) { 1386 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT40U 1387 | IEEE80211_CHAN_VHT40U; 1388 } 1389 if (ht40) { 1390 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT40D; 1391 } 1392 if (ht40 && isset(bands, IEEE80211_MODE_VHT_5GHZ)) { 1393 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT40D 1394 | IEEE80211_CHAN_VHT40D; 1395 } 1396 1397 /* 80MHz */ 1398 if (vht80 && isset(bands, IEEE80211_MODE_VHT_5GHZ)) { 1399 flags[nmodes++] = IEEE80211_CHAN_A | 1400 IEEE80211_CHAN_HT40U | IEEE80211_CHAN_VHT80; 1401 flags[nmodes++] = IEEE80211_CHAN_A | 1402 IEEE80211_CHAN_HT40D | IEEE80211_CHAN_VHT80; 1403 } 1404 1405 /* XXX VHT80+80 */ 1406 /* XXX VHT160 */ 1407 flags[nmodes] = 0; 1408 } 1409 1410 static void 1411 getflags(const uint8_t bands[], uint32_t flags[], int ht40, int vht80) 1412 { 1413 1414 flags[0] = 0; 1415 if (isset(bands, IEEE80211_MODE_11A) || 1416 isset(bands, IEEE80211_MODE_11NA) || 1417 isset(bands, IEEE80211_MODE_VHT_5GHZ)) { 1418 if (isset(bands, IEEE80211_MODE_11B) || 1419 isset(bands, IEEE80211_MODE_11G) || 1420 isset(bands, IEEE80211_MODE_11NG) || 1421 isset(bands, IEEE80211_MODE_VHT_2GHZ)) 1422 return; 1423 1424 getflags_5ghz(bands, flags, ht40, vht80); 1425 } else 1426 getflags_2ghz(bands, flags, ht40); 1427 } 1428 1429 /* 1430 * Add one 20 MHz channel into specified channel list. 1431 */ 1432 /* XXX VHT */ 1433 int 1434 ieee80211_add_channel(struct ieee80211_channel chans[], int maxchans, 1435 int *nchans, uint8_t ieee, uint16_t freq, int8_t maxregpower, 1436 uint32_t chan_flags, const uint8_t bands[]) 1437 { 1438 uint32_t flags[IEEE80211_MODE_MAX]; 1439 int i, error; 1440 1441 getflags(bands, flags, 0, 0); 1442 KASSERT(flags[0] != 0, ("%s: no correct mode provided\n", __func__)); 1443 1444 error = addchan(chans, maxchans, nchans, ieee, freq, maxregpower, 1445 flags[0] | chan_flags); 1446 for (i = 1; flags[i] != 0 && error == 0; i++) { 1447 error = copychan_prev(chans, maxchans, nchans, 1448 flags[i] | chan_flags); 1449 } 1450 1451 return (error); 1452 } 1453 1454 static struct ieee80211_channel * 1455 findchannel(struct ieee80211_channel chans[], int nchans, uint16_t freq, 1456 uint32_t flags) 1457 { 1458 struct ieee80211_channel *c; 1459 int i; 1460 1461 flags &= IEEE80211_CHAN_ALLTURBO; 1462 /* brute force search */ 1463 for (i = 0; i < nchans; i++) { 1464 c = &chans[i]; 1465 if (c->ic_freq == freq && 1466 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 1467 return c; 1468 } 1469 return NULL; 1470 } 1471 1472 /* 1473 * Add 40 MHz channel pair into specified channel list. 1474 */ 1475 /* XXX VHT */ 1476 int 1477 ieee80211_add_channel_ht40(struct ieee80211_channel chans[], int maxchans, 1478 int *nchans, uint8_t ieee, int8_t maxregpower, uint32_t flags) 1479 { 1480 struct ieee80211_channel *cent, *extc; 1481 uint16_t freq; 1482 int error; 1483 1484 freq = ieee80211_ieee2mhz(ieee, flags); 1485 1486 /* 1487 * Each entry defines an HT40 channel pair; find the 1488 * center channel, then the extension channel above. 1489 */ 1490 flags |= IEEE80211_CHAN_HT20; 1491 cent = findchannel(chans, *nchans, freq, flags); 1492 if (cent == NULL) 1493 return (EINVAL); 1494 1495 extc = findchannel(chans, *nchans, freq + 20, flags); 1496 if (extc == NULL) 1497 return (ENOENT); 1498 1499 flags &= ~IEEE80211_CHAN_HT; 1500 error = addchan(chans, maxchans, nchans, cent->ic_ieee, cent->ic_freq, 1501 maxregpower, flags | IEEE80211_CHAN_HT40U); 1502 if (error != 0) 1503 return (error); 1504 1505 error = addchan(chans, maxchans, nchans, extc->ic_ieee, extc->ic_freq, 1506 maxregpower, flags | IEEE80211_CHAN_HT40D); 1507 1508 return (error); 1509 } 1510 1511 /* 1512 * Fetch the center frequency for the primary channel. 1513 */ 1514 uint32_t 1515 ieee80211_get_channel_center_freq(const struct ieee80211_channel *c) 1516 { 1517 1518 return (c->ic_freq); 1519 } 1520 1521 /* 1522 * Fetch the center frequency for the primary BAND channel. 1523 * 1524 * For 5, 10, 20MHz channels it'll be the normally configured channel 1525 * frequency. 1526 * 1527 * For 40MHz, 80MHz, 160Mhz channels it'll the the centre of the 1528 * wide channel, not the centre of the primary channel (that's ic_freq). 1529 * 1530 * For 80+80MHz channels this will be the centre of the primary 1531 * 80MHz channel; the secondary 80MHz channel will be center_freq2(). 1532 */ 1533 uint32_t 1534 ieee80211_get_channel_center_freq1(const struct ieee80211_channel *c) 1535 { 1536 1537 /* 1538 * VHT - use the pre-calculated centre frequency 1539 * of the given channel. 1540 */ 1541 if (IEEE80211_IS_CHAN_VHT(c)) 1542 return (ieee80211_ieee2mhz(c->ic_vht_ch_freq1, c->ic_flags)); 1543 1544 if (IEEE80211_IS_CHAN_HT40U(c)) { 1545 return (c->ic_freq + 10); 1546 } 1547 if (IEEE80211_IS_CHAN_HT40D(c)) { 1548 return (c->ic_freq - 10); 1549 } 1550 1551 return (c->ic_freq); 1552 } 1553 1554 /* 1555 * For now, no 80+80 support; it will likely always return 0. 1556 */ 1557 uint32_t 1558 ieee80211_get_channel_center_freq2(const struct ieee80211_channel *c) 1559 { 1560 1561 if (IEEE80211_IS_CHAN_VHT(c) && (c->ic_vht_ch_freq2 != 0)) 1562 return (ieee80211_ieee2mhz(c->ic_vht_ch_freq2, c->ic_flags)); 1563 1564 return (0); 1565 } 1566 1567 /* 1568 * Adds channels into specified channel list (ieee[] array must be sorted). 1569 * Channels are already sorted. 1570 */ 1571 static int 1572 add_chanlist(struct ieee80211_channel chans[], int maxchans, int *nchans, 1573 const uint8_t ieee[], int nieee, uint32_t flags[]) 1574 { 1575 uint16_t freq; 1576 int i, j, error; 1577 int is_vht; 1578 1579 for (i = 0; i < nieee; i++) { 1580 freq = ieee80211_ieee2mhz(ieee[i], flags[0]); 1581 for (j = 0; flags[j] != 0; j++) { 1582 /* 1583 * Notes: 1584 * + HT40 and VHT40 channels occur together, so 1585 * we need to be careful that we actually allow that. 1586 * + VHT80, VHT160 will coexist with HT40/VHT40, so 1587 * make sure it's not skipped because of the overlap 1588 * check used for (V)HT40. 1589 */ 1590 is_vht = !! (flags[j] & IEEE80211_CHAN_VHT); 1591 1592 /* 1593 * Test for VHT80. 1594 * XXX This is all very broken right now. 1595 * What we /should/ do is: 1596 * 1597 * + check that the frequency is in the list of 1598 * allowed VHT80 ranges; and 1599 * + the other 3 channels in the list are actually 1600 * also available. 1601 */ 1602 if (is_vht && flags[j] & IEEE80211_CHAN_VHT80) 1603 if (! is_vht80_valid_freq(freq)) 1604 continue; 1605 1606 /* 1607 * Test for (V)HT40. 1608 * 1609 * This is also a fall through from VHT80; as we only 1610 * allow a VHT80 channel if the VHT40 combination is 1611 * also valid. If the VHT40 form is not valid then 1612 * we certainly can't do VHT80.. 1613 */ 1614 if (flags[j] & IEEE80211_CHAN_HT40D) 1615 /* 1616 * Can't have a "lower" channel if we are the 1617 * first channel. 1618 * 1619 * Can't have a "lower" channel if it's below/ 1620 * within 20MHz of the first channel. 1621 * 1622 * Can't have a "lower" channel if the channel 1623 * below it is not 20MHz away. 1624 */ 1625 if (i == 0 || ieee[i] < ieee[0] + 4 || 1626 freq - 20 != 1627 ieee80211_ieee2mhz(ieee[i] - 4, flags[j])) 1628 continue; 1629 if (flags[j] & IEEE80211_CHAN_HT40U) 1630 /* 1631 * Can't have an "upper" channel if we are 1632 * the last channel. 1633 * 1634 * Can't have an "upper" channel be above the 1635 * last channel in the list. 1636 * 1637 * Can't have an "upper" channel if the next 1638 * channel according to the math isn't 20MHz 1639 * away. (Likely for channel 13/14.) 1640 */ 1641 if (i == nieee - 1 || 1642 ieee[i] + 4 > ieee[nieee - 1] || 1643 freq + 20 != 1644 ieee80211_ieee2mhz(ieee[i] + 4, flags[j])) 1645 continue; 1646 1647 if (j == 0) { 1648 error = addchan(chans, maxchans, nchans, 1649 ieee[i], freq, 0, flags[j]); 1650 } else { 1651 error = copychan_prev(chans, maxchans, nchans, 1652 flags[j]); 1653 } 1654 if (error != 0) 1655 return (error); 1656 } 1657 } 1658 1659 return (0); 1660 } 1661 1662 int 1663 ieee80211_add_channel_list_2ghz(struct ieee80211_channel chans[], int maxchans, 1664 int *nchans, const uint8_t ieee[], int nieee, const uint8_t bands[], 1665 int ht40) 1666 { 1667 uint32_t flags[IEEE80211_MODE_MAX]; 1668 1669 /* XXX no VHT for now */ 1670 getflags_2ghz(bands, flags, ht40); 1671 KASSERT(flags[0] != 0, ("%s: no correct mode provided\n", __func__)); 1672 1673 return (add_chanlist(chans, maxchans, nchans, ieee, nieee, flags)); 1674 } 1675 1676 int 1677 ieee80211_add_channel_list_5ghz(struct ieee80211_channel chans[], int maxchans, 1678 int *nchans, const uint8_t ieee[], int nieee, const uint8_t bands[], 1679 int ht40) 1680 { 1681 uint32_t flags[IEEE80211_MODE_MAX]; 1682 int vht80 = 0; 1683 1684 /* 1685 * For now, assume VHT == VHT80 support as a minimum. 1686 */ 1687 if (isset(bands, IEEE80211_MODE_VHT_5GHZ)) 1688 vht80 = 1; 1689 1690 getflags_5ghz(bands, flags, ht40, vht80); 1691 KASSERT(flags[0] != 0, ("%s: no correct mode provided\n", __func__)); 1692 1693 return (add_chanlist(chans, maxchans, nchans, ieee, nieee, flags)); 1694 } 1695 1696 /* 1697 * Locate a channel given a frequency+flags. We cache 1698 * the previous lookup to optimize switching between two 1699 * channels--as happens with dynamic turbo. 1700 */ 1701 struct ieee80211_channel * 1702 ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags) 1703 { 1704 struct ieee80211_channel *c; 1705 1706 flags &= IEEE80211_CHAN_ALLTURBO; 1707 c = ic->ic_prevchan; 1708 if (c != NULL && c->ic_freq == freq && 1709 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 1710 return c; 1711 /* brute force search */ 1712 return (findchannel(ic->ic_channels, ic->ic_nchans, freq, flags)); 1713 } 1714 1715 /* 1716 * Locate a channel given a channel number+flags. We cache 1717 * the previous lookup to optimize switching between two 1718 * channels--as happens with dynamic turbo. 1719 */ 1720 struct ieee80211_channel * 1721 ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags) 1722 { 1723 struct ieee80211_channel *c; 1724 int i; 1725 1726 flags &= IEEE80211_CHAN_ALLTURBO; 1727 c = ic->ic_prevchan; 1728 if (c != NULL && c->ic_ieee == ieee && 1729 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 1730 return c; 1731 /* brute force search */ 1732 for (i = 0; i < ic->ic_nchans; i++) { 1733 c = &ic->ic_channels[i]; 1734 if (c->ic_ieee == ieee && 1735 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 1736 return c; 1737 } 1738 return NULL; 1739 } 1740 1741 /* 1742 * Lookup a channel suitable for the given rx status. 1743 * 1744 * This is used to find a channel for a frame (eg beacon, probe 1745 * response) based purely on the received PHY information. 1746 * 1747 * For now it tries to do it based on R_FREQ / R_IEEE. 1748 * This is enough for 11bg and 11a (and thus 11ng/11na) 1749 * but it will not be enough for GSM, PSB channels and the 1750 * like. It also doesn't know about legacy-turbog and 1751 * legacy-turbo modes, which some offload NICs actually 1752 * support in weird ways. 1753 * 1754 * Takes the ic and rxstatus; returns the channel or NULL 1755 * if not found. 1756 * 1757 * XXX TODO: Add support for that when the need arises. 1758 */ 1759 struct ieee80211_channel * 1760 ieee80211_lookup_channel_rxstatus(struct ieee80211vap *vap, 1761 const struct ieee80211_rx_stats *rxs) 1762 { 1763 struct ieee80211com *ic = vap->iv_ic; 1764 uint32_t flags; 1765 struct ieee80211_channel *c; 1766 1767 if (rxs == NULL) 1768 return (NULL); 1769 1770 /* 1771 * Strictly speaking we only use freq for now, 1772 * however later on we may wish to just store 1773 * the ieee for verification. 1774 */ 1775 if ((rxs->r_flags & IEEE80211_R_FREQ) == 0) 1776 return (NULL); 1777 if ((rxs->r_flags & IEEE80211_R_IEEE) == 0) 1778 return (NULL); 1779 1780 /* 1781 * If the rx status contains a valid ieee/freq, then 1782 * ensure we populate the correct channel information 1783 * in rxchan before passing it up to the scan infrastructure. 1784 * Offload NICs will pass up beacons from all channels 1785 * during background scans. 1786 */ 1787 1788 /* Determine a band */ 1789 /* XXX should be done by the driver? */ 1790 if (rxs->c_freq < 3000) { 1791 flags = IEEE80211_CHAN_G; 1792 } else { 1793 flags = IEEE80211_CHAN_A; 1794 } 1795 1796 /* Channel lookup */ 1797 c = ieee80211_find_channel(ic, rxs->c_freq, flags); 1798 1799 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INPUT, 1800 "%s: freq=%d, ieee=%d, flags=0x%08x; c=%p\n", 1801 __func__, 1802 (int) rxs->c_freq, 1803 (int) rxs->c_ieee, 1804 flags, 1805 c); 1806 1807 return (c); 1808 } 1809 1810 static void 1811 addmedia(struct ifmedia *media, int caps, int addsta, int mode, int mword) 1812 { 1813 #define ADD(_ic, _s, _o) \ 1814 ifmedia_add(media, \ 1815 IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL) 1816 static const u_int mopts[IEEE80211_MODE_MAX] = { 1817 [IEEE80211_MODE_AUTO] = IFM_AUTO, 1818 [IEEE80211_MODE_11A] = IFM_IEEE80211_11A, 1819 [IEEE80211_MODE_11B] = IFM_IEEE80211_11B, 1820 [IEEE80211_MODE_11G] = IFM_IEEE80211_11G, 1821 [IEEE80211_MODE_FH] = IFM_IEEE80211_FH, 1822 [IEEE80211_MODE_TURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO, 1823 [IEEE80211_MODE_TURBO_G] = IFM_IEEE80211_11G|IFM_IEEE80211_TURBO, 1824 [IEEE80211_MODE_STURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO, 1825 [IEEE80211_MODE_HALF] = IFM_IEEE80211_11A, /* XXX */ 1826 [IEEE80211_MODE_QUARTER] = IFM_IEEE80211_11A, /* XXX */ 1827 [IEEE80211_MODE_11NA] = IFM_IEEE80211_11NA, 1828 [IEEE80211_MODE_11NG] = IFM_IEEE80211_11NG, 1829 [IEEE80211_MODE_VHT_2GHZ] = IFM_IEEE80211_VHT2G, 1830 [IEEE80211_MODE_VHT_5GHZ] = IFM_IEEE80211_VHT5G, 1831 }; 1832 u_int mopt; 1833 1834 mopt = mopts[mode]; 1835 if (addsta) 1836 ADD(ic, mword, mopt); /* STA mode has no cap */ 1837 if (caps & IEEE80211_C_IBSS) 1838 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC); 1839 if (caps & IEEE80211_C_HOSTAP) 1840 ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP); 1841 if (caps & IEEE80211_C_AHDEMO) 1842 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0); 1843 if (caps & IEEE80211_C_MONITOR) 1844 ADD(media, mword, mopt | IFM_IEEE80211_MONITOR); 1845 if (caps & IEEE80211_C_WDS) 1846 ADD(media, mword, mopt | IFM_IEEE80211_WDS); 1847 if (caps & IEEE80211_C_MBSS) 1848 ADD(media, mword, mopt | IFM_IEEE80211_MBSS); 1849 #undef ADD 1850 } 1851 1852 /* 1853 * Setup the media data structures according to the channel and 1854 * rate tables. 1855 */ 1856 static int 1857 ieee80211_media_setup(struct ieee80211com *ic, 1858 struct ifmedia *media, int caps, int addsta, 1859 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) 1860 { 1861 int i, j, rate, maxrate, mword, r; 1862 enum ieee80211_phymode mode; 1863 const struct ieee80211_rateset *rs; 1864 struct ieee80211_rateset allrates; 1865 1866 /* 1867 * Fill in media characteristics. 1868 */ 1869 ifmedia_init(media, 0, media_change, media_stat); 1870 maxrate = 0; 1871 /* 1872 * Add media for legacy operating modes. 1873 */ 1874 memset(&allrates, 0, sizeof(allrates)); 1875 for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) { 1876 if (isclr(ic->ic_modecaps, mode)) 1877 continue; 1878 addmedia(media, caps, addsta, mode, IFM_AUTO); 1879 if (mode == IEEE80211_MODE_AUTO) 1880 continue; 1881 rs = &ic->ic_sup_rates[mode]; 1882 for (i = 0; i < rs->rs_nrates; i++) { 1883 rate = rs->rs_rates[i]; 1884 mword = ieee80211_rate2media(ic, rate, mode); 1885 if (mword == 0) 1886 continue; 1887 addmedia(media, caps, addsta, mode, mword); 1888 /* 1889 * Add legacy rate to the collection of all rates. 1890 */ 1891 r = rate & IEEE80211_RATE_VAL; 1892 for (j = 0; j < allrates.rs_nrates; j++) 1893 if (allrates.rs_rates[j] == r) 1894 break; 1895 if (j == allrates.rs_nrates) { 1896 /* unique, add to the set */ 1897 allrates.rs_rates[j] = r; 1898 allrates.rs_nrates++; 1899 } 1900 rate = (rate & IEEE80211_RATE_VAL) / 2; 1901 if (rate > maxrate) 1902 maxrate = rate; 1903 } 1904 } 1905 for (i = 0; i < allrates.rs_nrates; i++) { 1906 mword = ieee80211_rate2media(ic, allrates.rs_rates[i], 1907 IEEE80211_MODE_AUTO); 1908 if (mword == 0) 1909 continue; 1910 /* NB: remove media options from mword */ 1911 addmedia(media, caps, addsta, 1912 IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword)); 1913 } 1914 /* 1915 * Add HT/11n media. Note that we do not have enough 1916 * bits in the media subtype to express the MCS so we 1917 * use a "placeholder" media subtype and any fixed MCS 1918 * must be specified with a different mechanism. 1919 */ 1920 for (; mode <= IEEE80211_MODE_11NG; mode++) { 1921 if (isclr(ic->ic_modecaps, mode)) 1922 continue; 1923 addmedia(media, caps, addsta, mode, IFM_AUTO); 1924 addmedia(media, caps, addsta, mode, IFM_IEEE80211_MCS); 1925 } 1926 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) || 1927 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) { 1928 addmedia(media, caps, addsta, 1929 IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS); 1930 i = ic->ic_txstream * 8 - 1; 1931 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) && 1932 (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI40)) 1933 rate = ieee80211_htrates[i].ht40_rate_400ns; 1934 else if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40)) 1935 rate = ieee80211_htrates[i].ht40_rate_800ns; 1936 else if ((ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI20)) 1937 rate = ieee80211_htrates[i].ht20_rate_400ns; 1938 else 1939 rate = ieee80211_htrates[i].ht20_rate_800ns; 1940 if (rate > maxrate) 1941 maxrate = rate; 1942 } 1943 1944 /* 1945 * Add VHT media. 1946 */ 1947 for (; mode <= IEEE80211_MODE_VHT_5GHZ; mode++) { 1948 if (isclr(ic->ic_modecaps, mode)) 1949 continue; 1950 addmedia(media, caps, addsta, mode, IFM_AUTO); 1951 addmedia(media, caps, addsta, mode, IFM_IEEE80211_VHT); 1952 1953 /* XXX TODO: VHT maxrate */ 1954 } 1955 1956 return maxrate; 1957 } 1958 1959 /* XXX inline or eliminate? */ 1960 const struct ieee80211_rateset * 1961 ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c) 1962 { 1963 /* XXX does this work for 11ng basic rates? */ 1964 return &ic->ic_sup_rates[ieee80211_chan2mode(c)]; 1965 } 1966 1967 /* XXX inline or eliminate? */ 1968 const struct ieee80211_htrateset * 1969 ieee80211_get_suphtrates(struct ieee80211com *ic, 1970 const struct ieee80211_channel *c) 1971 { 1972 return &ic->ic_sup_htrates; 1973 } 1974 1975 void 1976 ieee80211_announce(struct ieee80211com *ic) 1977 { 1978 int i, rate, mword; 1979 enum ieee80211_phymode mode; 1980 const struct ieee80211_rateset *rs; 1981 1982 /* NB: skip AUTO since it has no rates */ 1983 for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) { 1984 if (isclr(ic->ic_modecaps, mode)) 1985 continue; 1986 ic_printf(ic, "%s rates: ", ieee80211_phymode_name[mode]); 1987 rs = &ic->ic_sup_rates[mode]; 1988 for (i = 0; i < rs->rs_nrates; i++) { 1989 mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode); 1990 if (mword == 0) 1991 continue; 1992 rate = ieee80211_media2rate(mword); 1993 printf("%s%d%sMbps", (i != 0 ? " " : ""), 1994 rate / 2, ((rate & 0x1) != 0 ? ".5" : "")); 1995 } 1996 printf("\n"); 1997 } 1998 ieee80211_ht_announce(ic); 1999 ieee80211_vht_announce(ic); 2000 } 2001 2002 void 2003 ieee80211_announce_channels(struct ieee80211com *ic) 2004 { 2005 const struct ieee80211_channel *c; 2006 char type; 2007 int i, cw; 2008 2009 printf("Chan Freq CW RegPwr MinPwr MaxPwr\n"); 2010 for (i = 0; i < ic->ic_nchans; i++) { 2011 c = &ic->ic_channels[i]; 2012 if (IEEE80211_IS_CHAN_ST(c)) 2013 type = 'S'; 2014 else if (IEEE80211_IS_CHAN_108A(c)) 2015 type = 'T'; 2016 else if (IEEE80211_IS_CHAN_108G(c)) 2017 type = 'G'; 2018 else if (IEEE80211_IS_CHAN_HT(c)) 2019 type = 'n'; 2020 else if (IEEE80211_IS_CHAN_A(c)) 2021 type = 'a'; 2022 else if (IEEE80211_IS_CHAN_ANYG(c)) 2023 type = 'g'; 2024 else if (IEEE80211_IS_CHAN_B(c)) 2025 type = 'b'; 2026 else 2027 type = 'f'; 2028 if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c)) 2029 cw = 40; 2030 else if (IEEE80211_IS_CHAN_HALF(c)) 2031 cw = 10; 2032 else if (IEEE80211_IS_CHAN_QUARTER(c)) 2033 cw = 5; 2034 else 2035 cw = 20; 2036 printf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n" 2037 , c->ic_ieee, c->ic_freq, type 2038 , cw 2039 , IEEE80211_IS_CHAN_HT40U(c) ? '+' : 2040 IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' ' 2041 , c->ic_maxregpower 2042 , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0 2043 , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0 2044 ); 2045 } 2046 } 2047 2048 static int 2049 media2mode(const struct ifmedia_entry *ime, uint32_t flags, uint16_t *mode) 2050 { 2051 switch (IFM_MODE(ime->ifm_media)) { 2052 case IFM_IEEE80211_11A: 2053 *mode = IEEE80211_MODE_11A; 2054 break; 2055 case IFM_IEEE80211_11B: 2056 *mode = IEEE80211_MODE_11B; 2057 break; 2058 case IFM_IEEE80211_11G: 2059 *mode = IEEE80211_MODE_11G; 2060 break; 2061 case IFM_IEEE80211_FH: 2062 *mode = IEEE80211_MODE_FH; 2063 break; 2064 case IFM_IEEE80211_11NA: 2065 *mode = IEEE80211_MODE_11NA; 2066 break; 2067 case IFM_IEEE80211_11NG: 2068 *mode = IEEE80211_MODE_11NG; 2069 break; 2070 case IFM_AUTO: 2071 *mode = IEEE80211_MODE_AUTO; 2072 break; 2073 default: 2074 return 0; 2075 } 2076 /* 2077 * Turbo mode is an ``option''. 2078 * XXX does not apply to AUTO 2079 */ 2080 if (ime->ifm_media & IFM_IEEE80211_TURBO) { 2081 if (*mode == IEEE80211_MODE_11A) { 2082 if (flags & IEEE80211_F_TURBOP) 2083 *mode = IEEE80211_MODE_TURBO_A; 2084 else 2085 *mode = IEEE80211_MODE_STURBO_A; 2086 } else if (*mode == IEEE80211_MODE_11G) 2087 *mode = IEEE80211_MODE_TURBO_G; 2088 else 2089 return 0; 2090 } 2091 /* XXX HT40 +/- */ 2092 return 1; 2093 } 2094 2095 /* 2096 * Handle a media change request on the vap interface. 2097 */ 2098 int 2099 ieee80211_media_change(struct ifnet *ifp) 2100 { 2101 struct ieee80211vap *vap = ifp->if_softc; 2102 struct ifmedia_entry *ime = vap->iv_media.ifm_cur; 2103 uint16_t newmode; 2104 2105 if (!media2mode(ime, vap->iv_flags, &newmode)) 2106 return EINVAL; 2107 if (vap->iv_des_mode != newmode) { 2108 vap->iv_des_mode = newmode; 2109 /* XXX kick state machine if up+running */ 2110 } 2111 return 0; 2112 } 2113 2114 /* 2115 * Common code to calculate the media status word 2116 * from the operating mode and channel state. 2117 */ 2118 static int 2119 media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan) 2120 { 2121 int status; 2122 2123 status = IFM_IEEE80211; 2124 switch (opmode) { 2125 case IEEE80211_M_STA: 2126 break; 2127 case IEEE80211_M_IBSS: 2128 status |= IFM_IEEE80211_ADHOC; 2129 break; 2130 case IEEE80211_M_HOSTAP: 2131 status |= IFM_IEEE80211_HOSTAP; 2132 break; 2133 case IEEE80211_M_MONITOR: 2134 status |= IFM_IEEE80211_MONITOR; 2135 break; 2136 case IEEE80211_M_AHDEMO: 2137 status |= IFM_IEEE80211_ADHOC | IFM_FLAG0; 2138 break; 2139 case IEEE80211_M_WDS: 2140 status |= IFM_IEEE80211_WDS; 2141 break; 2142 case IEEE80211_M_MBSS: 2143 status |= IFM_IEEE80211_MBSS; 2144 break; 2145 } 2146 if (IEEE80211_IS_CHAN_HTA(chan)) { 2147 status |= IFM_IEEE80211_11NA; 2148 } else if (IEEE80211_IS_CHAN_HTG(chan)) { 2149 status |= IFM_IEEE80211_11NG; 2150 } else if (IEEE80211_IS_CHAN_A(chan)) { 2151 status |= IFM_IEEE80211_11A; 2152 } else if (IEEE80211_IS_CHAN_B(chan)) { 2153 status |= IFM_IEEE80211_11B; 2154 } else if (IEEE80211_IS_CHAN_ANYG(chan)) { 2155 status |= IFM_IEEE80211_11G; 2156 } else if (IEEE80211_IS_CHAN_FHSS(chan)) { 2157 status |= IFM_IEEE80211_FH; 2158 } 2159 /* XXX else complain? */ 2160 2161 if (IEEE80211_IS_CHAN_TURBO(chan)) 2162 status |= IFM_IEEE80211_TURBO; 2163 #if 0 2164 if (IEEE80211_IS_CHAN_HT20(chan)) 2165 status |= IFM_IEEE80211_HT20; 2166 if (IEEE80211_IS_CHAN_HT40(chan)) 2167 status |= IFM_IEEE80211_HT40; 2168 #endif 2169 return status; 2170 } 2171 2172 void 2173 ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr) 2174 { 2175 struct ieee80211vap *vap = ifp->if_softc; 2176 struct ieee80211com *ic = vap->iv_ic; 2177 enum ieee80211_phymode mode; 2178 2179 imr->ifm_status = IFM_AVALID; 2180 /* 2181 * NB: use the current channel's mode to lock down a xmit 2182 * rate only when running; otherwise we may have a mismatch 2183 * in which case the rate will not be convertible. 2184 */ 2185 if (vap->iv_state == IEEE80211_S_RUN || 2186 vap->iv_state == IEEE80211_S_SLEEP) { 2187 imr->ifm_status |= IFM_ACTIVE; 2188 mode = ieee80211_chan2mode(ic->ic_curchan); 2189 } else 2190 mode = IEEE80211_MODE_AUTO; 2191 imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan); 2192 /* 2193 * Calculate a current rate if possible. 2194 */ 2195 if (vap->iv_txparms[mode].ucastrate != IEEE80211_FIXED_RATE_NONE) { 2196 /* 2197 * A fixed rate is set, report that. 2198 */ 2199 imr->ifm_active |= ieee80211_rate2media(ic, 2200 vap->iv_txparms[mode].ucastrate, mode); 2201 } else if (vap->iv_opmode == IEEE80211_M_STA) { 2202 /* 2203 * In station mode report the current transmit rate. 2204 */ 2205 imr->ifm_active |= ieee80211_rate2media(ic, 2206 vap->iv_bss->ni_txrate, mode); 2207 } else 2208 imr->ifm_active |= IFM_AUTO; 2209 if (imr->ifm_status & IFM_ACTIVE) 2210 imr->ifm_current = imr->ifm_active; 2211 } 2212 2213 /* 2214 * Set the current phy mode and recalculate the active channel 2215 * set based on the available channels for this mode. Also 2216 * select a new default/current channel if the current one is 2217 * inappropriate for this mode. 2218 */ 2219 int 2220 ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode) 2221 { 2222 /* 2223 * Adjust basic rates in 11b/11g supported rate set. 2224 * Note that if operating on a hal/quarter rate channel 2225 * this is a noop as those rates sets are different 2226 * and used instead. 2227 */ 2228 if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B) 2229 ieee80211_setbasicrates(&ic->ic_sup_rates[mode], mode); 2230 2231 ic->ic_curmode = mode; 2232 ieee80211_reset_erp(ic); /* reset ERP state */ 2233 2234 return 0; 2235 } 2236 2237 /* 2238 * Return the phy mode for with the specified channel. 2239 */ 2240 enum ieee80211_phymode 2241 ieee80211_chan2mode(const struct ieee80211_channel *chan) 2242 { 2243 2244 if (IEEE80211_IS_CHAN_VHT_2GHZ(chan)) 2245 return IEEE80211_MODE_VHT_2GHZ; 2246 else if (IEEE80211_IS_CHAN_VHT_5GHZ(chan)) 2247 return IEEE80211_MODE_VHT_5GHZ; 2248 else if (IEEE80211_IS_CHAN_HTA(chan)) 2249 return IEEE80211_MODE_11NA; 2250 else if (IEEE80211_IS_CHAN_HTG(chan)) 2251 return IEEE80211_MODE_11NG; 2252 else if (IEEE80211_IS_CHAN_108G(chan)) 2253 return IEEE80211_MODE_TURBO_G; 2254 else if (IEEE80211_IS_CHAN_ST(chan)) 2255 return IEEE80211_MODE_STURBO_A; 2256 else if (IEEE80211_IS_CHAN_TURBO(chan)) 2257 return IEEE80211_MODE_TURBO_A; 2258 else if (IEEE80211_IS_CHAN_HALF(chan)) 2259 return IEEE80211_MODE_HALF; 2260 else if (IEEE80211_IS_CHAN_QUARTER(chan)) 2261 return IEEE80211_MODE_QUARTER; 2262 else if (IEEE80211_IS_CHAN_A(chan)) 2263 return IEEE80211_MODE_11A; 2264 else if (IEEE80211_IS_CHAN_ANYG(chan)) 2265 return IEEE80211_MODE_11G; 2266 else if (IEEE80211_IS_CHAN_B(chan)) 2267 return IEEE80211_MODE_11B; 2268 else if (IEEE80211_IS_CHAN_FHSS(chan)) 2269 return IEEE80211_MODE_FH; 2270 2271 /* NB: should not get here */ 2272 printf("%s: cannot map channel to mode; freq %u flags 0x%x\n", 2273 __func__, chan->ic_freq, chan->ic_flags); 2274 return IEEE80211_MODE_11B; 2275 } 2276 2277 struct ratemedia { 2278 u_int match; /* rate + mode */ 2279 u_int media; /* if_media rate */ 2280 }; 2281 2282 static int 2283 findmedia(const struct ratemedia rates[], int n, u_int match) 2284 { 2285 int i; 2286 2287 for (i = 0; i < n; i++) 2288 if (rates[i].match == match) 2289 return rates[i].media; 2290 return IFM_AUTO; 2291 } 2292 2293 /* 2294 * Convert IEEE80211 rate value to ifmedia subtype. 2295 * Rate is either a legacy rate in units of 0.5Mbps 2296 * or an MCS index. 2297 */ 2298 int 2299 ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode) 2300 { 2301 static const struct ratemedia rates[] = { 2302 { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 }, 2303 { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 }, 2304 { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 }, 2305 { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 }, 2306 { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 }, 2307 { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 }, 2308 { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 }, 2309 { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 }, 2310 { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 }, 2311 { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 }, 2312 { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 }, 2313 { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 }, 2314 { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 }, 2315 { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 }, 2316 { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 }, 2317 { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 }, 2318 { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 }, 2319 { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 }, 2320 { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 }, 2321 { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 }, 2322 { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 }, 2323 { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 }, 2324 { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 }, 2325 { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 }, 2326 { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 }, 2327 { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 }, 2328 { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 }, 2329 { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 }, 2330 { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 }, 2331 { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 }, 2332 /* NB: OFDM72 doesn't really exist so we don't handle it */ 2333 }; 2334 static const struct ratemedia htrates[] = { 2335 { 0, IFM_IEEE80211_MCS }, 2336 { 1, IFM_IEEE80211_MCS }, 2337 { 2, IFM_IEEE80211_MCS }, 2338 { 3, IFM_IEEE80211_MCS }, 2339 { 4, IFM_IEEE80211_MCS }, 2340 { 5, IFM_IEEE80211_MCS }, 2341 { 6, IFM_IEEE80211_MCS }, 2342 { 7, IFM_IEEE80211_MCS }, 2343 { 8, IFM_IEEE80211_MCS }, 2344 { 9, IFM_IEEE80211_MCS }, 2345 { 10, IFM_IEEE80211_MCS }, 2346 { 11, IFM_IEEE80211_MCS }, 2347 { 12, IFM_IEEE80211_MCS }, 2348 { 13, IFM_IEEE80211_MCS }, 2349 { 14, IFM_IEEE80211_MCS }, 2350 { 15, IFM_IEEE80211_MCS }, 2351 { 16, IFM_IEEE80211_MCS }, 2352 { 17, IFM_IEEE80211_MCS }, 2353 { 18, IFM_IEEE80211_MCS }, 2354 { 19, IFM_IEEE80211_MCS }, 2355 { 20, IFM_IEEE80211_MCS }, 2356 { 21, IFM_IEEE80211_MCS }, 2357 { 22, IFM_IEEE80211_MCS }, 2358 { 23, IFM_IEEE80211_MCS }, 2359 { 24, IFM_IEEE80211_MCS }, 2360 { 25, IFM_IEEE80211_MCS }, 2361 { 26, IFM_IEEE80211_MCS }, 2362 { 27, IFM_IEEE80211_MCS }, 2363 { 28, IFM_IEEE80211_MCS }, 2364 { 29, IFM_IEEE80211_MCS }, 2365 { 30, IFM_IEEE80211_MCS }, 2366 { 31, IFM_IEEE80211_MCS }, 2367 { 32, IFM_IEEE80211_MCS }, 2368 { 33, IFM_IEEE80211_MCS }, 2369 { 34, IFM_IEEE80211_MCS }, 2370 { 35, IFM_IEEE80211_MCS }, 2371 { 36, IFM_IEEE80211_MCS }, 2372 { 37, IFM_IEEE80211_MCS }, 2373 { 38, IFM_IEEE80211_MCS }, 2374 { 39, IFM_IEEE80211_MCS }, 2375 { 40, IFM_IEEE80211_MCS }, 2376 { 41, IFM_IEEE80211_MCS }, 2377 { 42, IFM_IEEE80211_MCS }, 2378 { 43, IFM_IEEE80211_MCS }, 2379 { 44, IFM_IEEE80211_MCS }, 2380 { 45, IFM_IEEE80211_MCS }, 2381 { 46, IFM_IEEE80211_MCS }, 2382 { 47, IFM_IEEE80211_MCS }, 2383 { 48, IFM_IEEE80211_MCS }, 2384 { 49, IFM_IEEE80211_MCS }, 2385 { 50, IFM_IEEE80211_MCS }, 2386 { 51, IFM_IEEE80211_MCS }, 2387 { 52, IFM_IEEE80211_MCS }, 2388 { 53, IFM_IEEE80211_MCS }, 2389 { 54, IFM_IEEE80211_MCS }, 2390 { 55, IFM_IEEE80211_MCS }, 2391 { 56, IFM_IEEE80211_MCS }, 2392 { 57, IFM_IEEE80211_MCS }, 2393 { 58, IFM_IEEE80211_MCS }, 2394 { 59, IFM_IEEE80211_MCS }, 2395 { 60, IFM_IEEE80211_MCS }, 2396 { 61, IFM_IEEE80211_MCS }, 2397 { 62, IFM_IEEE80211_MCS }, 2398 { 63, IFM_IEEE80211_MCS }, 2399 { 64, IFM_IEEE80211_MCS }, 2400 { 65, IFM_IEEE80211_MCS }, 2401 { 66, IFM_IEEE80211_MCS }, 2402 { 67, IFM_IEEE80211_MCS }, 2403 { 68, IFM_IEEE80211_MCS }, 2404 { 69, IFM_IEEE80211_MCS }, 2405 { 70, IFM_IEEE80211_MCS }, 2406 { 71, IFM_IEEE80211_MCS }, 2407 { 72, IFM_IEEE80211_MCS }, 2408 { 73, IFM_IEEE80211_MCS }, 2409 { 74, IFM_IEEE80211_MCS }, 2410 { 75, IFM_IEEE80211_MCS }, 2411 { 76, IFM_IEEE80211_MCS }, 2412 }; 2413 int m; 2414 2415 /* 2416 * Check 11n rates first for match as an MCS. 2417 */ 2418 if (mode == IEEE80211_MODE_11NA) { 2419 if (rate & IEEE80211_RATE_MCS) { 2420 rate &= ~IEEE80211_RATE_MCS; 2421 m = findmedia(htrates, nitems(htrates), rate); 2422 if (m != IFM_AUTO) 2423 return m | IFM_IEEE80211_11NA; 2424 } 2425 } else if (mode == IEEE80211_MODE_11NG) { 2426 /* NB: 12 is ambiguous, it will be treated as an MCS */ 2427 if (rate & IEEE80211_RATE_MCS) { 2428 rate &= ~IEEE80211_RATE_MCS; 2429 m = findmedia(htrates, nitems(htrates), rate); 2430 if (m != IFM_AUTO) 2431 return m | IFM_IEEE80211_11NG; 2432 } 2433 } 2434 rate &= IEEE80211_RATE_VAL; 2435 switch (mode) { 2436 case IEEE80211_MODE_11A: 2437 case IEEE80211_MODE_HALF: /* XXX good 'nuf */ 2438 case IEEE80211_MODE_QUARTER: 2439 case IEEE80211_MODE_11NA: 2440 case IEEE80211_MODE_TURBO_A: 2441 case IEEE80211_MODE_STURBO_A: 2442 return findmedia(rates, nitems(rates), 2443 rate | IFM_IEEE80211_11A); 2444 case IEEE80211_MODE_11B: 2445 return findmedia(rates, nitems(rates), 2446 rate | IFM_IEEE80211_11B); 2447 case IEEE80211_MODE_FH: 2448 return findmedia(rates, nitems(rates), 2449 rate | IFM_IEEE80211_FH); 2450 case IEEE80211_MODE_AUTO: 2451 /* NB: ic may be NULL for some drivers */ 2452 if (ic != NULL && ic->ic_phytype == IEEE80211_T_FH) 2453 return findmedia(rates, nitems(rates), 2454 rate | IFM_IEEE80211_FH); 2455 /* NB: hack, 11g matches both 11b+11a rates */ 2456 /* fall thru... */ 2457 case IEEE80211_MODE_11G: 2458 case IEEE80211_MODE_11NG: 2459 case IEEE80211_MODE_TURBO_G: 2460 return findmedia(rates, nitems(rates), rate | IFM_IEEE80211_11G); 2461 case IEEE80211_MODE_VHT_2GHZ: 2462 case IEEE80211_MODE_VHT_5GHZ: 2463 /* XXX TODO: need to figure out mapping for VHT rates */ 2464 return IFM_AUTO; 2465 } 2466 return IFM_AUTO; 2467 } 2468 2469 int 2470 ieee80211_media2rate(int mword) 2471 { 2472 static const int ieeerates[] = { 2473 -1, /* IFM_AUTO */ 2474 0, /* IFM_MANUAL */ 2475 0, /* IFM_NONE */ 2476 2, /* IFM_IEEE80211_FH1 */ 2477 4, /* IFM_IEEE80211_FH2 */ 2478 2, /* IFM_IEEE80211_DS1 */ 2479 4, /* IFM_IEEE80211_DS2 */ 2480 11, /* IFM_IEEE80211_DS5 */ 2481 22, /* IFM_IEEE80211_DS11 */ 2482 44, /* IFM_IEEE80211_DS22 */ 2483 12, /* IFM_IEEE80211_OFDM6 */ 2484 18, /* IFM_IEEE80211_OFDM9 */ 2485 24, /* IFM_IEEE80211_OFDM12 */ 2486 36, /* IFM_IEEE80211_OFDM18 */ 2487 48, /* IFM_IEEE80211_OFDM24 */ 2488 72, /* IFM_IEEE80211_OFDM36 */ 2489 96, /* IFM_IEEE80211_OFDM48 */ 2490 108, /* IFM_IEEE80211_OFDM54 */ 2491 144, /* IFM_IEEE80211_OFDM72 */ 2492 0, /* IFM_IEEE80211_DS354k */ 2493 0, /* IFM_IEEE80211_DS512k */ 2494 6, /* IFM_IEEE80211_OFDM3 */ 2495 9, /* IFM_IEEE80211_OFDM4 */ 2496 54, /* IFM_IEEE80211_OFDM27 */ 2497 -1, /* IFM_IEEE80211_MCS */ 2498 -1, /* IFM_IEEE80211_VHT */ 2499 }; 2500 return IFM_SUBTYPE(mword) < nitems(ieeerates) ? 2501 ieeerates[IFM_SUBTYPE(mword)] : 0; 2502 } 2503 2504 /* 2505 * The following hash function is adapted from "Hash Functions" by Bob Jenkins 2506 * ("Algorithm Alley", Dr. Dobbs Journal, September 1997). 2507 */ 2508 #define mix(a, b, c) \ 2509 do { \ 2510 a -= b; a -= c; a ^= (c >> 13); \ 2511 b -= c; b -= a; b ^= (a << 8); \ 2512 c -= a; c -= b; c ^= (b >> 13); \ 2513 a -= b; a -= c; a ^= (c >> 12); \ 2514 b -= c; b -= a; b ^= (a << 16); \ 2515 c -= a; c -= b; c ^= (b >> 5); \ 2516 a -= b; a -= c; a ^= (c >> 3); \ 2517 b -= c; b -= a; b ^= (a << 10); \ 2518 c -= a; c -= b; c ^= (b >> 15); \ 2519 } while (/*CONSTCOND*/0) 2520 2521 uint32_t 2522 ieee80211_mac_hash(const struct ieee80211com *ic, 2523 const uint8_t addr[IEEE80211_ADDR_LEN]) 2524 { 2525 uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = ic->ic_hash_key; 2526 2527 b += addr[5] << 8; 2528 b += addr[4]; 2529 a += addr[3] << 24; 2530 a += addr[2] << 16; 2531 a += addr[1] << 8; 2532 a += addr[0]; 2533 2534 mix(a, b, c); 2535 2536 return c; 2537 } 2538 #undef mix 2539 2540 char 2541 ieee80211_channel_type_char(const struct ieee80211_channel *c) 2542 { 2543 if (IEEE80211_IS_CHAN_ST(c)) 2544 return 'S'; 2545 if (IEEE80211_IS_CHAN_108A(c)) 2546 return 'T'; 2547 if (IEEE80211_IS_CHAN_108G(c)) 2548 return 'G'; 2549 if (IEEE80211_IS_CHAN_VHT(c)) 2550 return 'v'; 2551 if (IEEE80211_IS_CHAN_HT(c)) 2552 return 'n'; 2553 if (IEEE80211_IS_CHAN_A(c)) 2554 return 'a'; 2555 if (IEEE80211_IS_CHAN_ANYG(c)) 2556 return 'g'; 2557 if (IEEE80211_IS_CHAN_B(c)) 2558 return 'b'; 2559 return 'f'; 2560 } 2561
Indexes created Thu Oct 02 10:09:58 GMT 2025