ieee80211.c revision 1.56.18.3
1 /* $NetBSD: ieee80211.c,v 1.56.18.3 2018/07/16 20:11:11 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 static uint ic_list_mtx_needsinit = 1; 334 static uint ic_list_mtx_ready = 0; 335 #endif 336 337 #if notyet 338 static int 339 sysctl_ieee80211coms(SYSCTL_HANDLER_ARGS) 340 { 341 struct ieee80211com *ic; 342 struct sbuf sb; 343 char *sp; 344 int error; 345 346 error = sysctl_wire_old_buffer(req, 0); 347 if (error) 348 return (error); 349 sbuf_new_for_sysctl(&sb, NULL, 8, req); 350 sbuf_clear_flags(&sb, SBUF_INCLUDENUL); 351 sp = ""; 352 mtx_lock(&ic_list_mtx); 353 LIST_FOREACH(ic, &ic_head, ic_next) { 354 sbuf_printf(&sb, "%s%s", sp, ic->ic_name); 355 sp = " "; 356 } 357 mtx_unlock(&ic_list_mtx); 358 error = sbuf_finish(&sb); 359 sbuf_delete(&sb); 360 return (error); 361 } 362 363 SYSCTL_PROC(_net_wlan, OID_AUTO, devices, 364 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, 365 sysctl_ieee80211coms, "A", "names of available 802.11 devices"); 366 #endif 367 368 /* 369 * Attach/setup the common net80211 state. Called by 370 * the driver on attach to prior to creating any vap's. 371 */ 372 void 373 ieee80211_ifattach(struct ieee80211com *ic) 374 { 375 #if __NetBSD__ 376 /* Initialize the ic_list_mtx the first time here. 377 * Only want to use the big lock on first try to initialize. 378 * Once initialized, it won't use the big lock any more. 379 */ 380 if (ic_list_mtx_needsinit) { 381 KERNEL_LOCK(1, NULL); 382 if (!ic_list_mtx_ready) { 383 mutex_init(&ic_list_mtx, MUTEX_DEFAULT, IPL_NET); 384 ic_list_mtx_ready = 1; 385 ic_list_mtx_needsinit = 0; 386 /* Doing this one-time initialization here also. */ 387 ieee80211_auth_setup(); 388 } 389 KERNEL_UNLOCK_ONE(NULL); 390 } 391 #endif 392 393 IEEE80211_LOCK_INIT(ic, ic->ic_name); 394 IEEE80211_TX_LOCK_INIT(ic, ic->ic_name); 395 TAILQ_INIT(&ic->ic_vaps); 396 397 #if __FreeBSD__ 398 /* Create a taskqueue for all state changes */ 399 ic->ic_tq = taskqueue_create("ic_taskq", M_WAITOK | M_ZERO, 400 taskqueue_thread_enqueue, &ic->ic_tq); 401 taskqueue_start_threads(&ic->ic_tq, 1, PI_NET, "%s net80211 taskq", 402 ic->ic_name); 403 ic->ic_ierrors = counter_u64_alloc(M_WAITOK); 404 ic->ic_oerrors = counter_u64_alloc(M_WAITOK); 405 #elif__NetBSD__ 406 /* NNN task/workqueue get it ready.... */ 407 ic->ic_ierrors = 0; 408 ic->ic_oerrors = 0; 409 #endif 410 411 /* 412 * Fill in 802.11 available channel set, mark all 413 * available channels as active, and pick a default 414 * channel if not already specified. 415 */ 416 ieee80211_chan_init(ic); 417 418 ic->ic_update_mcast = null_update_mcast; 419 ic->ic_update_promisc = null_update_promisc; 420 ic->ic_update_chw = null_update_chw; 421 422 ic->ic_hash_key = arc4random(); 423 ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT; 424 ic->ic_lintval = ic->ic_bintval; 425 ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX; 426 427 ieee80211_crypto_attach(ic); 428 ieee80211_node_attach(ic); 429 ieee80211_power_attach(ic); 430 ieee80211_proto_attach(ic); 431 #ifdef IEEE80211_SUPPORT_SUPERG 432 ieee80211_superg_attach(ic); 433 #endif 434 ieee80211_ht_attach(ic); 435 ieee80211_vht_attach(ic); 436 ieee80211_scan_attach(ic); 437 ieee80211_regdomain_attach(ic); 438 ieee80211_dfs_attach(ic); 439 440 ieee80211_sysctl_attach(ic); 441 442 mtx_lock(&ic_list_mtx); 443 LIST_INSERT_HEAD(&ic_head, ic, ic_next); 444 mtx_unlock(&ic_list_mtx); 445 } 446 447 /* 448 * Detach net80211 state on device detach. Tear down 449 * all vap's and reclaim all common state prior to the 450 * device state going away. Note we may call back into 451 * driver; it must be prepared for this. 452 */ 453 void 454 ieee80211_ifdetach(struct ieee80211com *ic) 455 { 456 struct ieee80211vap *vap; 457 458 mtx_lock(&ic_list_mtx); 459 LIST_REMOVE(ic, ic_next); 460 mtx_unlock(&ic_list_mtx); 461 462 taskqueue_drain(taskqueue_thread, &ic->ic_restart_task); 463 464 /* 465 * The VAP is responsible for setting and clearing 466 * the VIMAGE context. 467 */ 468 while ((vap = TAILQ_FIRST(&ic->ic_vaps)) != NULL) 469 ieee80211_vap_destroy(vap); 470 ieee80211_waitfor_parent(ic); 471 472 ieee80211_sysctl_detach(ic); 473 ieee80211_dfs_detach(ic); 474 ieee80211_regdomain_detach(ic); 475 ieee80211_scan_detach(ic); 476 #ifdef IEEE80211_SUPPORT_SUPERG 477 ieee80211_superg_detach(ic); 478 #endif 479 ieee80211_vht_detach(ic); 480 ieee80211_ht_detach(ic); 481 /* NB: must be called before ieee80211_node_detach */ 482 ieee80211_proto_detach(ic); 483 ieee80211_crypto_detach(ic); 484 ieee80211_power_detach(ic); 485 ieee80211_node_detach(ic); 486 487 counter_u64_free(ic->ic_ierrors); 488 counter_u64_free(ic->ic_oerrors); 489 490 taskqueue_free(ic->ic_tq); 491 IEEE80211_TX_LOCK_DESTROY(ic); 492 IEEE80211_LOCK_DESTROY(ic); 493 } 494 495 struct ieee80211com * 496 ieee80211_find_com(const char *name) 497 { 498 struct ieee80211com *ic; 499 500 mtx_lock(&ic_list_mtx); 501 LIST_FOREACH(ic, &ic_head, ic_next) 502 if (strcmp(ic->ic_name, name) == 0) 503 break; 504 mtx_unlock(&ic_list_mtx); 505 506 return (ic); 507 } 508 509 void 510 ieee80211_iterate_coms(ieee80211_com_iter_func *f, void *arg) 511 { 512 struct ieee80211com *ic; 513 514 mtx_lock(&ic_list_mtx); 515 LIST_FOREACH(ic, &ic_head, ic_next) 516 (*f)(arg, ic); 517 mtx_unlock(&ic_list_mtx); 518 } 519 520 /* 521 * Default reset method for use with the ioctl support. This 522 * method is invoked after any state change in the 802.11 523 * layer that should be propagated to the hardware but not 524 * require re-initialization of the 802.11 state machine (e.g 525 * rescanning for an ap). We always return ENETRESET which 526 * should cause the driver to re-initialize the device. Drivers 527 * can override this method to implement more optimized support. 528 */ 529 static int 530 default_reset(struct ieee80211vap *vap, u_long cmd) 531 { 532 return ENETRESET; 533 } 534 535 /* 536 * Default for updating the VAP default TX key index. 537 * 538 * Drivers that support TX offload as well as hardware encryption offload 539 * may need to be informed of key index changes separate from the key 540 * update. 541 */ 542 static void 543 default_update_deftxkey(struct ieee80211vap *vap, ieee80211_keyix kid) 544 { 545 546 /* XXX assert validity */ 547 /* XXX assert we're in a key update block */ 548 vap->iv_def_txkey = kid; 549 } 550 551 /* 552 * Add underlying device errors to vap errors. 553 */ 554 static __unused uint64_t 555 ieee80211_get_counter(struct ifnet *ifp, ift_counter cnt) 556 { 557 struct ieee80211vap *vap = ifp->if_softc; 558 struct ieee80211com *ic = vap->iv_ic; 559 uint64_t rv; 560 561 rv = if_get_counter_default(ifp, cnt); 562 switch (cnt) { 563 case IFCOUNTER_OERRORS: 564 rv += counter_u64_fetch(ic->ic_oerrors); 565 break; 566 case IFCOUNTER_IERRORS: 567 rv += counter_u64_fetch(ic->ic_ierrors); 568 break; 569 default: 570 break; 571 } 572 573 return (rv); 574 } 575 576 /* 577 * Prepare a vap for use. Drivers use this call to 578 * setup net80211 state in new vap's prior attaching 579 * them with ieee80211_vap_attach (below). 580 */ 581 int 582 ieee80211_vap_setup(struct ieee80211com *ic, struct ieee80211vap *vap, 583 const char name[IFNAMSIZ], int unit, enum ieee80211_opmode opmode, 584 int flags, const uint8_t bssid[IEEE80211_ADDR_LEN]) 585 { 586 struct ifnet *ifp; 587 588 ifp = if_alloc(IFT_ETHER); 589 if (ifp == NULL) { 590 ic_printf(ic, "%s: unable to allocate ifnet\n", 591 __func__); 592 return ENOMEM; 593 } 594 #if __NetBSD__ 595 if_initialize(ifp); 596 #endif 597 if_initname(ifp, name, unit); 598 ifp->if_softc = vap; /* back pointer */ 599 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 600 ifp->if_transmit = ieee80211_vap_transmit; 601 #if __FreeBSD__ 602 ifp->if_qflush = ieee80211_vap_qflush; 603 #endif 604 ifp->if_ioctl = ieee80211_ioctl; 605 ifp->if_init = ieee80211_init; 606 607 #if notyet 608 ifp->if_get_counter = ieee80211_get_counter; 609 #endif 610 vap->iv_ifp = ifp; 611 vap->iv_ic = ic; 612 vap->iv_flags = ic->ic_flags; /* propagate common flags */ 613 vap->iv_flags_ext = ic->ic_flags_ext; 614 vap->iv_flags_ven = ic->ic_flags_ven; 615 vap->iv_caps = ic->ic_caps &~ IEEE80211_C_OPMODE; 616 617 /* 11n capabilities - XXX methodize */ 618 vap->iv_htcaps = ic->ic_htcaps; 619 vap->iv_htextcaps = ic->ic_htextcaps; 620 621 /* 11ac capabilities - XXX methodize */ 622 vap->iv_vhtcaps = ic->ic_vhtcaps; 623 vap->iv_vhtextcaps = ic->ic_vhtextcaps; 624 625 vap->iv_opmode = opmode; 626 vap->iv_caps |= ieee80211_opcap[opmode]; 627 IEEE80211_ADDR_COPY(vap->iv_myaddr, ic->ic_macaddr); 628 switch (opmode) { 629 case IEEE80211_M_WDS: 630 /* 631 * WDS links must specify the bssid of the far end. 632 * For legacy operation this is a static relationship. 633 * For non-legacy operation the station must associate 634 * and be authorized to pass traffic. Plumbing the 635 * vap to the proper node happens when the vap 636 * transitions to RUN state. 637 */ 638 IEEE80211_ADDR_COPY(vap->iv_des_bssid, bssid); 639 vap->iv_flags |= IEEE80211_F_DESBSSID; 640 if (flags & IEEE80211_CLONE_WDSLEGACY) 641 vap->iv_flags_ext |= IEEE80211_FEXT_WDSLEGACY; 642 break; 643 #ifdef IEEE80211_SUPPORT_TDMA 644 case IEEE80211_M_AHDEMO: 645 if (flags & IEEE80211_CLONE_TDMA) { 646 /* NB: checked before clone operation allowed */ 647 KASSERT(ic->ic_caps & IEEE80211_C_TDMA, 648 ("not TDMA capable, ic_caps 0x%x", ic->ic_caps)); 649 /* 650 * Propagate TDMA capability to mark vap; this 651 * cannot be removed and is used to distinguish 652 * regular ahdemo operation from ahdemo+tdma. 653 */ 654 vap->iv_caps |= IEEE80211_C_TDMA; 655 } 656 break; 657 #endif 658 default: 659 break; 660 } 661 /* auto-enable s/w beacon miss support */ 662 if (flags & IEEE80211_CLONE_NOBEACONS) 663 vap->iv_flags_ext |= IEEE80211_FEXT_SWBMISS; 664 /* auto-generated or user supplied MAC address */ 665 if (flags & (IEEE80211_CLONE_BSSID|IEEE80211_CLONE_MACADDR)) 666 vap->iv_flags_ext |= IEEE80211_FEXT_UNIQMAC; 667 /* 668 * Enable various functionality by default if we're 669 * capable; the driver can override us if it knows better. 670 */ 671 if (vap->iv_caps & IEEE80211_C_WME) 672 vap->iv_flags |= IEEE80211_F_WME; 673 if (vap->iv_caps & IEEE80211_C_BURST) 674 vap->iv_flags |= IEEE80211_F_BURST; 675 /* NB: bg scanning only makes sense for station mode right now */ 676 if (vap->iv_opmode == IEEE80211_M_STA && 677 (vap->iv_caps & IEEE80211_C_BGSCAN)) 678 vap->iv_flags |= IEEE80211_F_BGSCAN; 679 vap->iv_flags |= IEEE80211_F_DOTH; /* XXX no cap, just ena */ 680 /* NB: DFS support only makes sense for ap mode right now */ 681 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 682 (vap->iv_caps & IEEE80211_C_DFS)) 683 vap->iv_flags_ext |= IEEE80211_FEXT_DFS; 684 685 vap->iv_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */ 686 vap->iv_bmissthreshold = IEEE80211_HWBMISS_DEFAULT; 687 vap->iv_dtim_period = IEEE80211_DTIM_DEFAULT; 688 /* 689 * Install a default reset method for the ioctl support; 690 * the driver can override this. 691 */ 692 vap->iv_reset = default_reset; 693 694 /* 695 * Install a default crypto key update method, the driver 696 * can override this. 697 */ 698 vap->iv_update_deftxkey = default_update_deftxkey; 699 700 ieee80211_sysctl_vattach(vap); 701 ieee80211_crypto_vattach(vap); 702 ieee80211_node_vattach(vap); 703 ieee80211_power_vattach(vap); 704 ieee80211_proto_vattach(vap); 705 #ifdef IEEE80211_SUPPORT_SUPERG 706 ieee80211_superg_vattach(vap); 707 #endif 708 ieee80211_ht_vattach(vap); 709 ieee80211_vht_vattach(vap); 710 ieee80211_scan_vattach(vap); 711 ieee80211_regdomain_vattach(vap); 712 ieee80211_radiotap_vattach(vap); 713 ieee80211_ratectl_set(vap, IEEE80211_RATECTL_NONE); 714 715 return 0; 716 } 717 718 /* 719 * Activate a vap. State should have been prepared with a 720 * call to ieee80211_vap_setup and by the driver. On return 721 * from this call the vap is ready for use. 722 */ 723 int 724 ieee80211_vap_attach(struct ieee80211vap *vap, ifm_change_cb_t media_change, 725 ifm_stat_cb_t media_stat, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 726 { 727 struct ifnet *ifp = vap->iv_ifp; 728 struct ieee80211com *ic = vap->iv_ic; 729 struct ifmediareq imr; 730 int maxrate; 731 732 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 733 "%s: %s parent %s flags 0x%x flags_ext 0x%x\n", 734 __func__, ieee80211_opmode_name[vap->iv_opmode], 735 ic->ic_name, vap->iv_flags, vap->iv_flags_ext); 736 737 /* 738 * Do late attach work that cannot happen until after 739 * the driver has had a chance to override defaults. 740 */ 741 ieee80211_node_latevattach(vap); 742 ieee80211_power_latevattach(vap); 743 744 maxrate = ieee80211_media_setup(ic, &vap->iv_media, vap->iv_caps, 745 vap->iv_opmode == IEEE80211_M_STA, media_change, media_stat); 746 ieee80211_media_status(ifp, &imr); 747 /* NB: strip explicit mode; we're actually in autoselect */ 748 ifmedia_set(&vap->iv_media, 749 imr.ifm_active &~ (IFM_MMASK | IFM_IEEE80211_TURBO)); 750 if (maxrate) 751 ifp->if_baudrate = IF_Mbps(maxrate); 752 753 ether_ifattach(ifp, macaddr); 754 IEEE80211_ADDR_COPY(vap->iv_myaddr, IF_LLADDR(ifp)); 755 /* hook output method setup by ether_ifattach */ 756 vap->iv_output = ifp->if_output; 757 ifp->if_output = ieee80211_output; 758 759 /* NB: if_mtu set by ether_ifattach to ETHERMTU */ 760 761 IEEE80211_LOCK(ic); 762 TAILQ_INSERT_TAIL(&ic->ic_vaps, vap, iv_next); 763 ieee80211_syncflag_locked(ic, IEEE80211_F_WME); 764 #ifdef IEEE80211_SUPPORT_SUPERG 765 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); 766 #endif 767 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); 768 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); 769 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT); 770 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40); 771 772 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_VHT); 773 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT40); 774 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT80); 775 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT80P80); 776 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT160); 777 IEEE80211_UNLOCK(ic); 778 779 #if __NetBSD__ 780 if_register(ifp); 781 #endif 782 783 return 1; 784 } 785 786 /* 787 * Tear down vap state and reclaim the ifnet. 788 * The driver is assumed to have prepared for 789 * this; e.g. by turning off interrupts for the 790 * underlying device. 791 */ 792 void 793 ieee80211_vap_detach(struct ieee80211vap *vap) 794 { 795 struct ieee80211com *ic = vap->iv_ic; 796 struct ifnet *ifp = vap->iv_ifp; 797 798 CURVNET_SET(ifp->if_vnet); 799 800 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s parent %s\n", 801 __func__, ieee80211_opmode_name[vap->iv_opmode], ic->ic_name); 802 803 /* NB: bpfdetach is called by ether_ifdetach and claims all taps */ 804 ether_ifdetach(ifp); 805 806 ieee80211_stop(vap); 807 808 /* 809 * Flush any deferred vap tasks. 810 */ 811 ieee80211_draintask(ic, &vap->iv_nstate_task); 812 ieee80211_draintask(ic, &vap->iv_swbmiss_task); 813 ieee80211_draintask(ic, &vap->iv_wme_task); 814 ieee80211_draintask(ic, &ic->ic_parent_task); 815 816 /* XXX band-aid until ifnet handles this for us */ 817 taskqueue_drain(taskqueue_swi, &ifp->if_linktask); 818 819 IEEE80211_LOCK(ic); 820 KASSERT(vap->iv_state == IEEE80211_S_INIT , ("vap still running")); 821 TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next); 822 ieee80211_syncflag_locked(ic, IEEE80211_F_WME); 823 #ifdef IEEE80211_SUPPORT_SUPERG 824 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); 825 #endif 826 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); 827 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); 828 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT); 829 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40); 830 831 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_VHT); 832 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT40); 833 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT80); 834 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT80P80); 835 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT160); 836 837 /* NB: this handles the bpfdetach done below */ 838 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_BPF); 839 if (vap->iv_ifflags & IFF_PROMISC) 840 ieee80211_promisc(vap, false); 841 if (vap->iv_ifflags & IFF_ALLMULTI) 842 ieee80211_allmulti(vap, false); 843 IEEE80211_UNLOCK(ic); 844 845 ifmedia_removeall(&vap->iv_media); 846 847 ieee80211_radiotap_vdetach(vap); 848 ieee80211_regdomain_vdetach(vap); 849 ieee80211_scan_vdetach(vap); 850 #ifdef IEEE80211_SUPPORT_SUPERG 851 ieee80211_superg_vdetach(vap); 852 #endif 853 ieee80211_vht_vdetach(vap); 854 ieee80211_ht_vdetach(vap); 855 /* NB: must be before ieee80211_node_vdetach */ 856 ieee80211_proto_vdetach(vap); 857 ieee80211_crypto_vdetach(vap); 858 ieee80211_power_vdetach(vap); 859 ieee80211_node_vdetach(vap); 860 ieee80211_sysctl_vdetach(vap); 861 862 if_free(ifp); 863 864 CURVNET_RESTORE(); 865 } 866 867 /* 868 * Count number of vaps in promisc, and issue promisc on 869 * parent respectively. 870 */ 871 void 872 ieee80211_promisc(struct ieee80211vap *vap, bool on) 873 { 874 struct ieee80211com *ic = vap->iv_ic; 875 876 IEEE80211_LOCK_ASSERT(ic); 877 878 if (on) { 879 if (++ic->ic_promisc == 1) 880 ieee80211_runtask(ic, &ic->ic_promisc_task); 881 } else { 882 KASSERT(ic->ic_promisc > 0, ("%s: ic %p not promisc", 883 __func__, ic)); 884 if (--ic->ic_promisc == 0) 885 ieee80211_runtask(ic, &ic->ic_promisc_task); 886 } 887 } 888 889 /* 890 * Count number of vaps in allmulti, and issue allmulti on 891 * parent respectively. 892 */ 893 void 894 ieee80211_allmulti(struct ieee80211vap *vap, bool on) 895 { 896 struct ieee80211com *ic = vap->iv_ic; 897 898 IEEE80211_LOCK_ASSERT(ic); 899 900 if (on) { 901 if (++ic->ic_allmulti == 1) 902 ieee80211_runtask(ic, &ic->ic_mcast_task); 903 } else { 904 KASSERT(ic->ic_allmulti > 0, ("%s: ic %p not allmulti", 905 __func__, ic)); 906 if (--ic->ic_allmulti == 0) 907 ieee80211_runtask(ic, &ic->ic_mcast_task); 908 } 909 } 910 911 /* 912 * Synchronize flag bit state in the com structure 913 * according to the state of all vap's. This is used, 914 * for example, to handle state changes via ioctls. 915 */ 916 static void 917 ieee80211_syncflag_locked(struct ieee80211com *ic, int flag) 918 { 919 struct ieee80211vap *vap; 920 int bit; 921 922 IEEE80211_LOCK_ASSERT(ic); 923 924 bit = 0; 925 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 926 if (vap->iv_flags & flag) { 927 bit = 1; 928 break; 929 } 930 if (bit) 931 ic->ic_flags |= flag; 932 else 933 ic->ic_flags &= ~flag; 934 } 935 936 void 937 ieee80211_syncflag(struct ieee80211vap *vap, int flag) 938 { 939 struct ieee80211com *ic = vap->iv_ic; 940 941 IEEE80211_LOCK(ic); 942 if (flag < 0) { 943 flag = -flag; 944 vap->iv_flags &= ~flag; 945 } else 946 vap->iv_flags |= flag; 947 ieee80211_syncflag_locked(ic, flag); 948 IEEE80211_UNLOCK(ic); 949 } 950 951 /* 952 * Synchronize flags_ht bit state in the com structure 953 * according to the state of all vap's. This is used, 954 * for example, to handle state changes via ioctls. 955 */ 956 static void 957 ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag) 958 { 959 struct ieee80211vap *vap; 960 int bit; 961 962 IEEE80211_LOCK_ASSERT(ic); 963 964 bit = 0; 965 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 966 if (vap->iv_flags_ht & flag) { 967 bit = 1; 968 break; 969 } 970 if (bit) 971 ic->ic_flags_ht |= flag; 972 else 973 ic->ic_flags_ht &= ~flag; 974 } 975 976 void 977 ieee80211_syncflag_ht(struct ieee80211vap *vap, int flag) 978 { 979 struct ieee80211com *ic = vap->iv_ic; 980 981 IEEE80211_LOCK(ic); 982 if (flag < 0) { 983 flag = -flag; 984 vap->iv_flags_ht &= ~flag; 985 } else 986 vap->iv_flags_ht |= flag; 987 ieee80211_syncflag_ht_locked(ic, flag); 988 IEEE80211_UNLOCK(ic); 989 } 990 991 /* 992 * Synchronize flags_vht bit state in the com structure 993 * according to the state of all vap's. This is used, 994 * for example, to handle state changes via ioctls. 995 */ 996 static void 997 ieee80211_syncflag_vht_locked(struct ieee80211com *ic, int flag) 998 { 999 struct ieee80211vap *vap; 1000 int bit; 1001 1002 IEEE80211_LOCK_ASSERT(ic); 1003 1004 bit = 0; 1005 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1006 if (vap->iv_flags_vht & flag) { 1007 bit = 1; 1008 break; 1009 } 1010 if (bit) 1011 ic->ic_flags_vht |= flag; 1012 else 1013 ic->ic_flags_vht &= ~flag; 1014 } 1015 1016 void 1017 ieee80211_syncflag_vht(struct ieee80211vap *vap, int flag) 1018 { 1019 struct ieee80211com *ic = vap->iv_ic; 1020 1021 IEEE80211_LOCK(ic); 1022 if (flag < 0) { 1023 flag = -flag; 1024 vap->iv_flags_vht &= ~flag; 1025 } else 1026 vap->iv_flags_vht |= flag; 1027 ieee80211_syncflag_vht_locked(ic, flag); 1028 IEEE80211_UNLOCK(ic); 1029 } 1030 1031 /* 1032 * Synchronize flags_ext bit state in the com structure 1033 * according to the state of all vap's. This is used, 1034 * for example, to handle state changes via ioctls. 1035 */ 1036 static void 1037 ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag) 1038 { 1039 struct ieee80211vap *vap; 1040 int bit; 1041 1042 IEEE80211_LOCK_ASSERT(ic); 1043 1044 bit = 0; 1045 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1046 if (vap->iv_flags_ext & flag) { 1047 bit = 1; 1048 break; 1049 } 1050 if (bit) 1051 ic->ic_flags_ext |= flag; 1052 else 1053 ic->ic_flags_ext &= ~flag; 1054 } 1055 1056 void 1057 ieee80211_syncflag_ext(struct ieee80211vap *vap, int flag) 1058 { 1059 struct ieee80211com *ic = vap->iv_ic; 1060 1061 IEEE80211_LOCK(ic); 1062 if (flag < 0) { 1063 flag = -flag; 1064 vap->iv_flags_ext &= ~flag; 1065 } else 1066 vap->iv_flags_ext |= flag; 1067 ieee80211_syncflag_ext_locked(ic, flag); 1068 IEEE80211_UNLOCK(ic); 1069 } 1070 1071 static __inline int 1072 mapgsm(u_int freq, u_int flags) 1073 { 1074 freq *= 10; 1075 if (flags & IEEE80211_CHAN_QUARTER) 1076 freq += 5; 1077 else if (flags & IEEE80211_CHAN_HALF) 1078 freq += 10; 1079 else 1080 freq += 20; 1081 /* NB: there is no 907/20 wide but leave room */ 1082 return (freq - 906*10) / 5; 1083 } 1084 1085 static __inline int 1086 mappsb(u_int freq, u_int flags) 1087 { 1088 return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5; 1089 } 1090 1091 /* 1092 * Convert MHz frequency to IEEE channel number. 1093 */ 1094 int 1095 ieee80211_mhz2ieee(u_int freq, u_int flags) 1096 { 1097 #define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990) 1098 if (flags & IEEE80211_CHAN_GSM) 1099 return mapgsm(freq, flags); 1100 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 1101 if (freq == 2484) 1102 return 14; 1103 if (freq < 2484) 1104 return ((int) freq - 2407) / 5; 1105 else 1106 return 15 + ((freq - 2512) / 20); 1107 } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */ 1108 if (freq <= 5000) { 1109 /* XXX check regdomain? */ 1110 if (IS_FREQ_IN_PSB(freq)) 1111 return mappsb(freq, flags); 1112 return (freq - 4000) / 5; 1113 } else 1114 return (freq - 5000) / 5; 1115 } else { /* either, guess */ 1116 if (freq == 2484) 1117 return 14; 1118 if (freq < 2484) { 1119 if (907 <= freq && freq <= 922) 1120 return mapgsm(freq, flags); 1121 return ((int) freq - 2407) / 5; 1122 } 1123 if (freq < 5000) { 1124 if (IS_FREQ_IN_PSB(freq)) 1125 return mappsb(freq, flags); 1126 else if (freq > 4900) 1127 return (freq - 4000) / 5; 1128 else 1129 return 15 + ((freq - 2512) / 20); 1130 } 1131 return (freq - 5000) / 5; 1132 } 1133 #undef IS_FREQ_IN_PSB 1134 } 1135 1136 /* 1137 * Convert channel to IEEE channel number. 1138 */ 1139 int 1140 ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c) 1141 { 1142 if (c == NULL) { 1143 ic_printf(ic, "invalid channel (NULL)\n"); 1144 return 0; /* XXX */ 1145 } 1146 return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee); 1147 } 1148 1149 /* 1150 * Convert IEEE channel number to MHz frequency. 1151 */ 1152 u_int 1153 ieee80211_ieee2mhz(u_int chan, u_int flags) 1154 { 1155 if (flags & IEEE80211_CHAN_GSM) 1156 return 907 + 5 * (chan / 10); 1157 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 1158 if (chan == 14) 1159 return 2484; 1160 if (chan < 14) 1161 return 2407 + chan*5; 1162 else 1163 return 2512 + ((chan-15)*20); 1164 } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */ 1165 if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) { 1166 chan -= 37; 1167 return 4940 + chan*5 + (chan % 5 ? 2 : 0); 1168 } 1169 return 5000 + (chan*5); 1170 } else { /* either, guess */ 1171 /* XXX can't distinguish PSB+GSM channels */ 1172 if (chan == 14) 1173 return 2484; 1174 if (chan < 14) /* 0-13 */ 1175 return 2407 + chan*5; 1176 if (chan < 27) /* 15-26 */ 1177 return 2512 + ((chan-15)*20); 1178 return 5000 + (chan*5); 1179 } 1180 } 1181 1182 static __inline void 1183 set_extchan(struct ieee80211_channel *c) 1184 { 1185 1186 /* 1187 * IEEE Std 802.11-2012, page 1738, subclause 20.3.15.4: 1188 * "the secondary channel number shall be 'N + [1,-1] * 4' 1189 */ 1190 if (c->ic_flags & IEEE80211_CHAN_HT40U) 1191 c->ic_extieee = c->ic_ieee + 4; 1192 else if (c->ic_flags & IEEE80211_CHAN_HT40D) 1193 c->ic_extieee = c->ic_ieee - 4; 1194 else 1195 c->ic_extieee = 0; 1196 } 1197 1198 /* 1199 * Populate the freq1/freq2 fields as appropriate for VHT channels. 1200 * 1201 * This for now uses a hard-coded list of 80MHz wide channels. 1202 * 1203 * For HT20/HT40, freq1 just is the centre frequency of the 40MHz 1204 * wide channel we've already decided upon. 1205 * 1206 * For VHT80 and VHT160, there are only a small number of fixed 1207 * 80/160MHz wide channels, so we just use those. 1208 * 1209 * This is all likely very very wrong - both the regulatory code 1210 * and this code needs to ensure that all four channels are 1211 * available and valid before the VHT80 (and eight for VHT160) channel 1212 * is created. 1213 */ 1214 1215 struct vht_chan_range { 1216 uint16_t freq_start; 1217 uint16_t freq_end; 1218 }; 1219 1220 struct vht_chan_range vht80_chan_ranges[] = { 1221 { 5170, 5250 }, 1222 { 5250, 5330 }, 1223 { 5490, 5570 }, 1224 { 5570, 5650 }, 1225 { 5650, 5730 }, 1226 { 5735, 5815 }, 1227 { 0, 0, } 1228 }; 1229 1230 static int 1231 set_vht_extchan(struct ieee80211_channel *c) 1232 { 1233 int i; 1234 1235 if (! IEEE80211_IS_CHAN_VHT(c)) { 1236 return (0); 1237 } 1238 1239 if (IEEE80211_IS_CHAN_VHT20(c)) { 1240 c->ic_vht_ch_freq1 = c->ic_ieee; 1241 return (1); 1242 } 1243 1244 if (IEEE80211_IS_CHAN_VHT40(c)) { 1245 if (IEEE80211_IS_CHAN_HT40U(c)) 1246 c->ic_vht_ch_freq1 = c->ic_ieee + 2; 1247 else if (IEEE80211_IS_CHAN_HT40D(c)) 1248 c->ic_vht_ch_freq1 = c->ic_ieee - 2; 1249 else 1250 return (0); 1251 return (1); 1252 } 1253 1254 if (IEEE80211_IS_CHAN_VHT80(c)) { 1255 for (i = 0; vht80_chan_ranges[i].freq_start != 0; i++) { 1256 if (c->ic_freq >= vht80_chan_ranges[i].freq_start && 1257 c->ic_freq < vht80_chan_ranges[i].freq_end) { 1258 int midpoint; 1259 1260 midpoint = vht80_chan_ranges[i].freq_start + 40; 1261 c->ic_vht_ch_freq1 = 1262 ieee80211_mhz2ieee(midpoint, c->ic_flags); 1263 c->ic_vht_ch_freq2 = 0; 1264 #if 0 1265 printf("%s: %d, freq=%d, midpoint=%d, freq1=%d, freq2=%d\n", 1266 __func__, c->ic_ieee, c->ic_freq, midpoint, 1267 c->ic_vht_ch_freq1, c->ic_vht_ch_freq2); 1268 #endif 1269 return (1); 1270 } 1271 } 1272 return (0); 1273 } 1274 1275 printf("%s: unknown VHT channel type (ieee=%d, flags=0x%08x)\n", 1276 __func__, 1277 c->ic_ieee, 1278 c->ic_flags); 1279 1280 return (0); 1281 } 1282 1283 /* 1284 * Return whether the current channel could possibly be a part of 1285 * a VHT80 channel. 1286 * 1287 * This doesn't check that the whole range is in the allowed list 1288 * according to regulatory. 1289 */ 1290 static int 1291 is_vht80_valid_freq(uint16_t freq) 1292 { 1293 int i; 1294 for (i = 0; vht80_chan_ranges[i].freq_start != 0; i++) { 1295 if (freq >= vht80_chan_ranges[i].freq_start && 1296 freq < vht80_chan_ranges[i].freq_end) 1297 return (1); 1298 } 1299 return (0); 1300 } 1301 1302 static int 1303 addchan(struct ieee80211_channel chans[], int maxchans, int *nchans, 1304 uint8_t ieee, uint16_t freq, int8_t maxregpower, uint32_t flags) 1305 { 1306 struct ieee80211_channel *c; 1307 1308 if (*nchans >= maxchans) 1309 return (ENOBUFS); 1310 1311 #if 0 1312 printf("%s: %d: ieee=%d, freq=%d, flags=0x%08x\n", 1313 __func__, 1314 *nchans, 1315 ieee, 1316 freq, 1317 flags); 1318 #endif 1319 1320 c = &chans[(*nchans)++]; 1321 c->ic_ieee = ieee; 1322 c->ic_freq = freq != 0 ? freq : ieee80211_ieee2mhz(ieee, flags); 1323 c->ic_maxregpower = maxregpower; 1324 c->ic_maxpower = 2 * maxregpower; 1325 c->ic_flags = flags; 1326 c->ic_vht_ch_freq1 = 0; 1327 c->ic_vht_ch_freq2 = 0; 1328 set_extchan(c); 1329 set_vht_extchan(c); 1330 1331 return (0); 1332 } 1333 1334 static int 1335 copychan_prev(struct ieee80211_channel chans[], int maxchans, int *nchans, 1336 uint32_t flags) 1337 { 1338 struct ieee80211_channel *c; 1339 1340 KASSERT(*nchans > 0, ("channel list is empty\n")); 1341 1342 if (*nchans >= maxchans) 1343 return (ENOBUFS); 1344 1345 #if 0 1346 printf("%s: %d: flags=0x%08x\n", 1347 __func__, 1348 *nchans, 1349 flags); 1350 #endif 1351 1352 c = &chans[(*nchans)++]; 1353 c[0] = c[-1]; 1354 c->ic_flags = flags; 1355 c->ic_vht_ch_freq1 = 0; 1356 c->ic_vht_ch_freq2 = 0; 1357 set_extchan(c); 1358 set_vht_extchan(c); 1359 1360 return (0); 1361 } 1362 1363 /* 1364 * XXX VHT-2GHz 1365 */ 1366 static void 1367 getflags_2ghz(const uint8_t bands[], uint32_t flags[], int ht40) 1368 { 1369 int nmodes; 1370 1371 nmodes = 0; 1372 if (isset(bands, IEEE80211_MODE_11B)) 1373 flags[nmodes++] = IEEE80211_CHAN_B; 1374 if (isset(bands, IEEE80211_MODE_11G)) 1375 flags[nmodes++] = IEEE80211_CHAN_G; 1376 if (isset(bands, IEEE80211_MODE_11NG)) 1377 flags[nmodes++] = IEEE80211_CHAN_G | IEEE80211_CHAN_HT20; 1378 if (ht40) { 1379 flags[nmodes++] = IEEE80211_CHAN_G | IEEE80211_CHAN_HT40U; 1380 flags[nmodes++] = IEEE80211_CHAN_G | IEEE80211_CHAN_HT40D; 1381 } 1382 flags[nmodes] = 0; 1383 } 1384 1385 static void 1386 getflags_5ghz(const uint8_t bands[], uint32_t flags[], int ht40, int vht80) 1387 { 1388 int nmodes; 1389 1390 /* 1391 * the addchan_list function seems to expect the flags array to 1392 * be in channel width order, so the VHT bits are interspersed 1393 * as appropriate to maintain said order. 1394 * 1395 * It also assumes HT40U is before HT40D. 1396 */ 1397 nmodes = 0; 1398 1399 /* 20MHz */ 1400 if (isset(bands, IEEE80211_MODE_11A)) 1401 flags[nmodes++] = IEEE80211_CHAN_A; 1402 if (isset(bands, IEEE80211_MODE_11NA)) 1403 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT20; 1404 if (isset(bands, IEEE80211_MODE_VHT_5GHZ)) { 1405 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT20 | 1406 IEEE80211_CHAN_VHT20; 1407 } 1408 1409 /* 40MHz */ 1410 if (ht40) { 1411 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT40U; 1412 } 1413 if (ht40 && isset(bands, IEEE80211_MODE_VHT_5GHZ)) { 1414 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT40U 1415 | IEEE80211_CHAN_VHT40U; 1416 } 1417 if (ht40) { 1418 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT40D; 1419 } 1420 if (ht40 && isset(bands, IEEE80211_MODE_VHT_5GHZ)) { 1421 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT40D 1422 | IEEE80211_CHAN_VHT40D; 1423 } 1424 1425 /* 80MHz */ 1426 if (vht80 && isset(bands, IEEE80211_MODE_VHT_5GHZ)) { 1427 flags[nmodes++] = IEEE80211_CHAN_A | 1428 IEEE80211_CHAN_HT40U | IEEE80211_CHAN_VHT80; 1429 flags[nmodes++] = IEEE80211_CHAN_A | 1430 IEEE80211_CHAN_HT40D | IEEE80211_CHAN_VHT80; 1431 } 1432 1433 /* XXX VHT80+80 */ 1434 /* XXX VHT160 */ 1435 flags[nmodes] = 0; 1436 } 1437 1438 static void 1439 getflags(const uint8_t bands[], uint32_t flags[], int ht40, int vht80) 1440 { 1441 1442 flags[0] = 0; 1443 if (isset(bands, IEEE80211_MODE_11A) || 1444 isset(bands, IEEE80211_MODE_11NA) || 1445 isset(bands, IEEE80211_MODE_VHT_5GHZ)) { 1446 if (isset(bands, IEEE80211_MODE_11B) || 1447 isset(bands, IEEE80211_MODE_11G) || 1448 isset(bands, IEEE80211_MODE_11NG) || 1449 isset(bands, IEEE80211_MODE_VHT_2GHZ)) 1450 return; 1451 1452 getflags_5ghz(bands, flags, ht40, vht80); 1453 } else 1454 getflags_2ghz(bands, flags, ht40); 1455 } 1456 1457 /* 1458 * Add one 20 MHz channel into specified channel list. 1459 */ 1460 /* XXX VHT */ 1461 int 1462 ieee80211_add_channel(struct ieee80211_channel chans[], int maxchans, 1463 int *nchans, uint8_t ieee, uint16_t freq, int8_t maxregpower, 1464 uint32_t chan_flags, const uint8_t bands[]) 1465 { 1466 uint32_t flags[IEEE80211_MODE_MAX]; 1467 int i, error; 1468 1469 getflags(bands, flags, 0, 0); 1470 KASSERT(flags[0] != 0, ("%s: no correct mode provided\n", __func__)); 1471 1472 error = addchan(chans, maxchans, nchans, ieee, freq, maxregpower, 1473 flags[0] | chan_flags); 1474 for (i = 1; flags[i] != 0 && error == 0; i++) { 1475 error = copychan_prev(chans, maxchans, nchans, 1476 flags[i] | chan_flags); 1477 } 1478 1479 return (error); 1480 } 1481 1482 static struct ieee80211_channel * 1483 findchannel(struct ieee80211_channel chans[], int nchans, uint16_t freq, 1484 uint32_t flags) 1485 { 1486 struct ieee80211_channel *c; 1487 int i; 1488 1489 flags &= IEEE80211_CHAN_ALLTURBO; 1490 /* brute force search */ 1491 for (i = 0; i < nchans; i++) { 1492 c = &chans[i]; 1493 if (c->ic_freq == freq && 1494 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 1495 return c; 1496 } 1497 return NULL; 1498 } 1499 1500 /* 1501 * Add 40 MHz channel pair into specified channel list. 1502 */ 1503 /* XXX VHT */ 1504 int 1505 ieee80211_add_channel_ht40(struct ieee80211_channel chans[], int maxchans, 1506 int *nchans, uint8_t ieee, int8_t maxregpower, uint32_t flags) 1507 { 1508 struct ieee80211_channel *cent, *extc; 1509 uint16_t freq; 1510 int error; 1511 1512 freq = ieee80211_ieee2mhz(ieee, flags); 1513 1514 /* 1515 * Each entry defines an HT40 channel pair; find the 1516 * center channel, then the extension channel above. 1517 */ 1518 flags |= IEEE80211_CHAN_HT20; 1519 cent = findchannel(chans, *nchans, freq, flags); 1520 if (cent == NULL) 1521 return (EINVAL); 1522 1523 extc = findchannel(chans, *nchans, freq + 20, flags); 1524 if (extc == NULL) 1525 return (ENOENT); 1526 1527 flags &= ~IEEE80211_CHAN_HT; 1528 error = addchan(chans, maxchans, nchans, cent->ic_ieee, cent->ic_freq, 1529 maxregpower, flags | IEEE80211_CHAN_HT40U); 1530 if (error != 0) 1531 return (error); 1532 1533 error = addchan(chans, maxchans, nchans, extc->ic_ieee, extc->ic_freq, 1534 maxregpower, flags | IEEE80211_CHAN_HT40D); 1535 1536 return (error); 1537 } 1538 1539 /* 1540 * Fetch the center frequency for the primary channel. 1541 */ 1542 uint32_t 1543 ieee80211_get_channel_center_freq(const struct ieee80211_channel *c) 1544 { 1545 1546 return (c->ic_freq); 1547 } 1548 1549 /* 1550 * Fetch the center frequency for the primary BAND channel. 1551 * 1552 * For 5, 10, 20MHz channels it'll be the normally configured channel 1553 * frequency. 1554 * 1555 * For 40MHz, 80MHz, 160Mhz channels it'll the the centre of the 1556 * wide channel, not the centre of the primary channel (that's ic_freq). 1557 * 1558 * For 80+80MHz channels this will be the centre of the primary 1559 * 80MHz channel; the secondary 80MHz channel will be center_freq2(). 1560 */ 1561 uint32_t 1562 ieee80211_get_channel_center_freq1(const struct ieee80211_channel *c) 1563 { 1564 1565 /* 1566 * VHT - use the pre-calculated centre frequency 1567 * of the given channel. 1568 */ 1569 if (IEEE80211_IS_CHAN_VHT(c)) 1570 return (ieee80211_ieee2mhz(c->ic_vht_ch_freq1, c->ic_flags)); 1571 1572 if (IEEE80211_IS_CHAN_HT40U(c)) { 1573 return (c->ic_freq + 10); 1574 } 1575 if (IEEE80211_IS_CHAN_HT40D(c)) { 1576 return (c->ic_freq - 10); 1577 } 1578 1579 return (c->ic_freq); 1580 } 1581 1582 /* 1583 * For now, no 80+80 support; it will likely always return 0. 1584 */ 1585 uint32_t 1586 ieee80211_get_channel_center_freq2(const struct ieee80211_channel *c) 1587 { 1588 1589 if (IEEE80211_IS_CHAN_VHT(c) && (c->ic_vht_ch_freq2 != 0)) 1590 return (ieee80211_ieee2mhz(c->ic_vht_ch_freq2, c->ic_flags)); 1591 1592 return (0); 1593 } 1594 1595 /* 1596 * Adds channels into specified channel list (ieee[] array must be sorted). 1597 * Channels are already sorted. 1598 */ 1599 static int 1600 add_chanlist(struct ieee80211_channel chans[], int maxchans, int *nchans, 1601 const uint8_t ieee[], int nieee, uint32_t flags[]) 1602 { 1603 uint16_t freq; 1604 int i, j, error; 1605 int is_vht; 1606 1607 for (i = 0; i < nieee; i++) { 1608 freq = ieee80211_ieee2mhz(ieee[i], flags[0]); 1609 for (j = 0; flags[j] != 0; j++) { 1610 /* 1611 * Notes: 1612 * + HT40 and VHT40 channels occur together, so 1613 * we need to be careful that we actually allow that. 1614 * + VHT80, VHT160 will coexist with HT40/VHT40, so 1615 * make sure it's not skipped because of the overlap 1616 * check used for (V)HT40. 1617 */ 1618 is_vht = !! (flags[j] & IEEE80211_CHAN_VHT); 1619 1620 /* 1621 * Test for VHT80. 1622 * XXX This is all very broken right now. 1623 * What we /should/ do is: 1624 * 1625 * + check that the frequency is in the list of 1626 * allowed VHT80 ranges; and 1627 * + the other 3 channels in the list are actually 1628 * also available. 1629 */ 1630 if (is_vht && flags[j] & IEEE80211_CHAN_VHT80) 1631 if (! is_vht80_valid_freq(freq)) 1632 continue; 1633 1634 /* 1635 * Test for (V)HT40. 1636 * 1637 * This is also a fall through from VHT80; as we only 1638 * allow a VHT80 channel if the VHT40 combination is 1639 * also valid. If the VHT40 form is not valid then 1640 * we certainly can't do VHT80.. 1641 */ 1642 if (flags[j] & IEEE80211_CHAN_HT40D) 1643 /* 1644 * Can't have a "lower" channel if we are the 1645 * first channel. 1646 * 1647 * Can't have a "lower" channel if it's below/ 1648 * within 20MHz of the first channel. 1649 * 1650 * Can't have a "lower" channel if the channel 1651 * below it is not 20MHz away. 1652 */ 1653 if (i == 0 || ieee[i] < ieee[0] + 4 || 1654 freq - 20 != 1655 ieee80211_ieee2mhz(ieee[i] - 4, flags[j])) 1656 continue; 1657 if (flags[j] & IEEE80211_CHAN_HT40U) 1658 /* 1659 * Can't have an "upper" channel if we are 1660 * the last channel. 1661 * 1662 * Can't have an "upper" channel be above the 1663 * last channel in the list. 1664 * 1665 * Can't have an "upper" channel if the next 1666 * channel according to the math isn't 20MHz 1667 * away. (Likely for channel 13/14.) 1668 */ 1669 if (i == nieee - 1 || 1670 ieee[i] + 4 > ieee[nieee - 1] || 1671 freq + 20 != 1672 ieee80211_ieee2mhz(ieee[i] + 4, flags[j])) 1673 continue; 1674 1675 if (j == 0) { 1676 error = addchan(chans, maxchans, nchans, 1677 ieee[i], freq, 0, flags[j]); 1678 } else { 1679 error = copychan_prev(chans, maxchans, nchans, 1680 flags[j]); 1681 } 1682 if (error != 0) 1683 return (error); 1684 } 1685 } 1686 1687 return (0); 1688 } 1689 1690 int 1691 ieee80211_add_channel_list_2ghz(struct ieee80211_channel chans[], int maxchans, 1692 int *nchans, const uint8_t ieee[], int nieee, const uint8_t bands[], 1693 int ht40) 1694 { 1695 uint32_t flags[IEEE80211_MODE_MAX]; 1696 1697 /* XXX no VHT for now */ 1698 getflags_2ghz(bands, flags, ht40); 1699 KASSERT(flags[0] != 0, ("%s: no correct mode provided\n", __func__)); 1700 1701 return (add_chanlist(chans, maxchans, nchans, ieee, nieee, flags)); 1702 } 1703 1704 int 1705 ieee80211_add_channel_list_5ghz(struct ieee80211_channel chans[], int maxchans, 1706 int *nchans, const uint8_t ieee[], int nieee, const uint8_t bands[], 1707 int ht40) 1708 { 1709 uint32_t flags[IEEE80211_MODE_MAX]; 1710 int vht80 = 0; 1711 1712 /* 1713 * For now, assume VHT == VHT80 support as a minimum. 1714 */ 1715 if (isset(bands, IEEE80211_MODE_VHT_5GHZ)) 1716 vht80 = 1; 1717 1718 getflags_5ghz(bands, flags, ht40, vht80); 1719 KASSERT(flags[0] != 0, ("%s: no correct mode provided\n", __func__)); 1720 1721 return (add_chanlist(chans, maxchans, nchans, ieee, nieee, flags)); 1722 } 1723 1724 /* 1725 * Locate a channel given a frequency+flags. We cache 1726 * the previous lookup to optimize switching between two 1727 * channels--as happens with dynamic turbo. 1728 */ 1729 struct ieee80211_channel * 1730 ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags) 1731 { 1732 struct ieee80211_channel *c; 1733 1734 flags &= IEEE80211_CHAN_ALLTURBO; 1735 c = ic->ic_prevchan; 1736 if (c != NULL && c->ic_freq == freq && 1737 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 1738 return c; 1739 /* brute force search */ 1740 return (findchannel(ic->ic_channels, ic->ic_nchans, freq, flags)); 1741 } 1742 1743 /* 1744 * Locate a channel given a channel number+flags. We cache 1745 * the previous lookup to optimize switching between two 1746 * channels--as happens with dynamic turbo. 1747 */ 1748 struct ieee80211_channel * 1749 ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags) 1750 { 1751 struct ieee80211_channel *c; 1752 int i; 1753 1754 flags &= IEEE80211_CHAN_ALLTURBO; 1755 c = ic->ic_prevchan; 1756 if (c != NULL && c->ic_ieee == ieee && 1757 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 1758 return c; 1759 /* brute force search */ 1760 for (i = 0; i < ic->ic_nchans; i++) { 1761 c = &ic->ic_channels[i]; 1762 if (c->ic_ieee == ieee && 1763 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 1764 return c; 1765 } 1766 return NULL; 1767 } 1768 1769 /* 1770 * Lookup a channel suitable for the given rx status. 1771 * 1772 * This is used to find a channel for a frame (eg beacon, probe 1773 * response) based purely on the received PHY information. 1774 * 1775 * For now it tries to do it based on R_FREQ / R_IEEE. 1776 * This is enough for 11bg and 11a (and thus 11ng/11na) 1777 * but it will not be enough for GSM, PSB channels and the 1778 * like. It also doesn't know about legacy-turbog and 1779 * legacy-turbo modes, which some offload NICs actually 1780 * support in weird ways. 1781 * 1782 * Takes the ic and rxstatus; returns the channel or NULL 1783 * if not found. 1784 * 1785 * XXX TODO: Add support for that when the need arises. 1786 */ 1787 struct ieee80211_channel * 1788 ieee80211_lookup_channel_rxstatus(struct ieee80211vap *vap, 1789 const struct ieee80211_rx_stats *rxs) 1790 { 1791 struct ieee80211com *ic = vap->iv_ic; 1792 uint32_t flags; 1793 struct ieee80211_channel *c; 1794 1795 if (rxs == NULL) 1796 return (NULL); 1797 1798 /* 1799 * Strictly speaking we only use freq for now, 1800 * however later on we may wish to just store 1801 * the ieee for verification. 1802 */ 1803 if ((rxs->r_flags & IEEE80211_R_FREQ) == 0) 1804 return (NULL); 1805 if ((rxs->r_flags & IEEE80211_R_IEEE) == 0) 1806 return (NULL); 1807 1808 /* 1809 * If the rx status contains a valid ieee/freq, then 1810 * ensure we populate the correct channel information 1811 * in rxchan before passing it up to the scan infrastructure. 1812 * Offload NICs will pass up beacons from all channels 1813 * during background scans. 1814 */ 1815 1816 /* Determine a band */ 1817 /* XXX should be done by the driver? */ 1818 if (rxs->c_freq < 3000) { 1819 flags = IEEE80211_CHAN_G; 1820 } else { 1821 flags = IEEE80211_CHAN_A; 1822 } 1823 1824 /* Channel lookup */ 1825 c = ieee80211_find_channel(ic, rxs->c_freq, flags); 1826 1827 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INPUT, 1828 "%s: freq=%d, ieee=%d, flags=0x%08x; c=%p\n", 1829 __func__, 1830 (int) rxs->c_freq, 1831 (int) rxs->c_ieee, 1832 flags, 1833 c); 1834 1835 return (c); 1836 } 1837 1838 static void 1839 addmedia(struct ifmedia *media, int caps, int addsta, int mode, int mword) 1840 { 1841 #define ADD(_ic, _s, _o) \ 1842 ifmedia_add(media, \ 1843 IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL) 1844 static const u_int mopts[IEEE80211_MODE_MAX] = { 1845 [IEEE80211_MODE_AUTO] = IFM_AUTO, 1846 [IEEE80211_MODE_11A] = IFM_IEEE80211_11A, 1847 [IEEE80211_MODE_11B] = IFM_IEEE80211_11B, 1848 [IEEE80211_MODE_11G] = IFM_IEEE80211_11G, 1849 [IEEE80211_MODE_FH] = IFM_IEEE80211_FH, 1850 [IEEE80211_MODE_TURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO, 1851 [IEEE80211_MODE_TURBO_G] = IFM_IEEE80211_11G|IFM_IEEE80211_TURBO, 1852 [IEEE80211_MODE_STURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO, 1853 [IEEE80211_MODE_HALF] = IFM_IEEE80211_11A, /* XXX */ 1854 [IEEE80211_MODE_QUARTER] = IFM_IEEE80211_11A, /* XXX */ 1855 [IEEE80211_MODE_11NA] = IFM_IEEE80211_11NA, 1856 [IEEE80211_MODE_11NG] = IFM_IEEE80211_11NG, 1857 [IEEE80211_MODE_VHT_2GHZ] = IFM_IEEE80211_VHT2G, 1858 [IEEE80211_MODE_VHT_5GHZ] = IFM_IEEE80211_VHT5G, 1859 }; 1860 u_int mopt; 1861 1862 mopt = mopts[mode]; 1863 if (addsta) 1864 ADD(ic, mword, mopt); /* STA mode has no cap */ 1865 if (caps & IEEE80211_C_IBSS) 1866 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC); 1867 if (caps & IEEE80211_C_HOSTAP) 1868 ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP); 1869 if (caps & IEEE80211_C_AHDEMO) 1870 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0); 1871 if (caps & IEEE80211_C_MONITOR) 1872 ADD(media, mword, mopt | IFM_IEEE80211_MONITOR); 1873 if (caps & IEEE80211_C_WDS) 1874 ADD(media, mword, mopt | IFM_IEEE80211_WDS); 1875 if (caps & IEEE80211_C_MBSS) 1876 ADD(media, mword, mopt | IFM_IEEE80211_MBSS); 1877 #undef ADD 1878 } 1879 1880 /* 1881 * Setup the media data structures according to the channel and 1882 * rate tables. 1883 */ 1884 static int 1885 ieee80211_media_setup(struct ieee80211com *ic, 1886 struct ifmedia *media, int caps, int addsta, 1887 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) 1888 { 1889 int i, j, rate, maxrate, mword, r; 1890 enum ieee80211_phymode mode; 1891 const struct ieee80211_rateset *rs; 1892 struct ieee80211_rateset allrates; 1893 1894 /* 1895 * Fill in media characteristics. 1896 */ 1897 ifmedia_init(media, 0, media_change, media_stat); 1898 maxrate = 0; 1899 /* 1900 * Add media for legacy operating modes. 1901 */ 1902 memset(&allrates, 0, sizeof(allrates)); 1903 for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) { 1904 if (isclr(ic->ic_modecaps, mode)) 1905 continue; 1906 addmedia(media, caps, addsta, mode, IFM_AUTO); 1907 if (mode == IEEE80211_MODE_AUTO) 1908 continue; 1909 rs = &ic->ic_sup_rates[mode]; 1910 for (i = 0; i < rs->rs_nrates; i++) { 1911 rate = rs->rs_rates[i]; 1912 mword = ieee80211_rate2media(ic, rate, mode); 1913 if (mword == 0) 1914 continue; 1915 addmedia(media, caps, addsta, mode, mword); 1916 /* 1917 * Add legacy rate to the collection of all rates. 1918 */ 1919 r = rate & IEEE80211_RATE_VAL; 1920 for (j = 0; j < allrates.rs_nrates; j++) 1921 if (allrates.rs_rates[j] == r) 1922 break; 1923 if (j == allrates.rs_nrates) { 1924 /* unique, add to the set */ 1925 allrates.rs_rates[j] = r; 1926 allrates.rs_nrates++; 1927 } 1928 rate = (rate & IEEE80211_RATE_VAL) / 2; 1929 if (rate > maxrate) 1930 maxrate = rate; 1931 } 1932 } 1933 for (i = 0; i < allrates.rs_nrates; i++) { 1934 mword = ieee80211_rate2media(ic, allrates.rs_rates[i], 1935 IEEE80211_MODE_AUTO); 1936 if (mword == 0) 1937 continue; 1938 /* NB: remove media options from mword */ 1939 addmedia(media, caps, addsta, 1940 IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword)); 1941 } 1942 /* 1943 * Add HT/11n media. Note that we do not have enough 1944 * bits in the media subtype to express the MCS so we 1945 * use a "placeholder" media subtype and any fixed MCS 1946 * must be specified with a different mechanism. 1947 */ 1948 for (; mode <= IEEE80211_MODE_11NG; mode++) { 1949 if (isclr(ic->ic_modecaps, mode)) 1950 continue; 1951 addmedia(media, caps, addsta, mode, IFM_AUTO); 1952 addmedia(media, caps, addsta, mode, IFM_IEEE80211_MCS); 1953 } 1954 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) || 1955 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) { 1956 addmedia(media, caps, addsta, 1957 IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS); 1958 i = ic->ic_txstream * 8 - 1; 1959 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) && 1960 (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI40)) 1961 rate = ieee80211_htrates[i].ht40_rate_400ns; 1962 else if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40)) 1963 rate = ieee80211_htrates[i].ht40_rate_800ns; 1964 else if ((ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI20)) 1965 rate = ieee80211_htrates[i].ht20_rate_400ns; 1966 else 1967 rate = ieee80211_htrates[i].ht20_rate_800ns; 1968 if (rate > maxrate) 1969 maxrate = rate; 1970 } 1971 1972 /* 1973 * Add VHT media. 1974 */ 1975 for (; mode <= IEEE80211_MODE_VHT_5GHZ; mode++) { 1976 if (isclr(ic->ic_modecaps, mode)) 1977 continue; 1978 addmedia(media, caps, addsta, mode, IFM_AUTO); 1979 addmedia(media, caps, addsta, mode, IFM_IEEE80211_VHT); 1980 1981 /* XXX TODO: VHT maxrate */ 1982 } 1983 1984 return maxrate; 1985 } 1986 1987 /* XXX inline or eliminate? */ 1988 const struct ieee80211_rateset * 1989 ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c) 1990 { 1991 /* XXX does this work for 11ng basic rates? */ 1992 return &ic->ic_sup_rates[ieee80211_chan2mode(c)]; 1993 } 1994 1995 /* XXX inline or eliminate? */ 1996 const struct ieee80211_htrateset * 1997 ieee80211_get_suphtrates(struct ieee80211com *ic, 1998 const struct ieee80211_channel *c) 1999 { 2000 return &ic->ic_sup_htrates; 2001 } 2002 2003 void 2004 ieee80211_announce(struct ieee80211com *ic) 2005 { 2006 int i, rate, mword; 2007 enum ieee80211_phymode mode; 2008 const struct ieee80211_rateset *rs; 2009 2010 /* NB: skip AUTO since it has no rates */ 2011 for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) { 2012 if (isclr(ic->ic_modecaps, mode)) 2013 continue; 2014 ic_printf(ic, "%s rates: ", ieee80211_phymode_name[mode]); 2015 rs = &ic->ic_sup_rates[mode]; 2016 for (i = 0; i < rs->rs_nrates; i++) { 2017 mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode); 2018 if (mword == 0) 2019 continue; 2020 rate = ieee80211_media2rate(mword); 2021 printf("%s%d%sMbps", (i != 0 ? " " : ""), 2022 rate / 2, ((rate & 0x1) != 0 ? ".5" : "")); 2023 } 2024 printf("\n"); 2025 } 2026 ieee80211_ht_announce(ic); 2027 ieee80211_vht_announce(ic); 2028 } 2029 2030 void 2031 ieee80211_announce_channels(struct ieee80211com *ic) 2032 { 2033 const struct ieee80211_channel *c; 2034 char type; 2035 int i, cw; 2036 2037 printf("Chan Freq CW RegPwr MinPwr MaxPwr\n"); 2038 for (i = 0; i < ic->ic_nchans; i++) { 2039 c = &ic->ic_channels[i]; 2040 if (IEEE80211_IS_CHAN_ST(c)) 2041 type = 'S'; 2042 else if (IEEE80211_IS_CHAN_108A(c)) 2043 type = 'T'; 2044 else if (IEEE80211_IS_CHAN_108G(c)) 2045 type = 'G'; 2046 else if (IEEE80211_IS_CHAN_HT(c)) 2047 type = 'n'; 2048 else if (IEEE80211_IS_CHAN_A(c)) 2049 type = 'a'; 2050 else if (IEEE80211_IS_CHAN_ANYG(c)) 2051 type = 'g'; 2052 else if (IEEE80211_IS_CHAN_B(c)) 2053 type = 'b'; 2054 else 2055 type = 'f'; 2056 if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c)) 2057 cw = 40; 2058 else if (IEEE80211_IS_CHAN_HALF(c)) 2059 cw = 10; 2060 else if (IEEE80211_IS_CHAN_QUARTER(c)) 2061 cw = 5; 2062 else 2063 cw = 20; 2064 printf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n" 2065 , c->ic_ieee, c->ic_freq, type 2066 , cw 2067 , IEEE80211_IS_CHAN_HT40U(c) ? '+' : 2068 IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' ' 2069 , c->ic_maxregpower 2070 , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0 2071 , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0 2072 ); 2073 } 2074 } 2075 2076 static int 2077 media2mode(const struct ifmedia_entry *ime, uint32_t flags, uint16_t *mode) 2078 { 2079 switch (IFM_MODE(ime->ifm_media)) { 2080 case IFM_IEEE80211_11A: 2081 *mode = IEEE80211_MODE_11A; 2082 break; 2083 case IFM_IEEE80211_11B: 2084 *mode = IEEE80211_MODE_11B; 2085 break; 2086 case IFM_IEEE80211_11G: 2087 *mode = IEEE80211_MODE_11G; 2088 break; 2089 case IFM_IEEE80211_FH: 2090 *mode = IEEE80211_MODE_FH; 2091 break; 2092 case IFM_IEEE80211_11NA: 2093 *mode = IEEE80211_MODE_11NA; 2094 break; 2095 case IFM_IEEE80211_11NG: 2096 *mode = IEEE80211_MODE_11NG; 2097 break; 2098 case IFM_AUTO: 2099 *mode = IEEE80211_MODE_AUTO; 2100 break; 2101 default: 2102 return 0; 2103 } 2104 /* 2105 * Turbo mode is an ``option''. 2106 * XXX does not apply to AUTO 2107 */ 2108 if (ime->ifm_media & IFM_IEEE80211_TURBO) { 2109 if (*mode == IEEE80211_MODE_11A) { 2110 if (flags & IEEE80211_F_TURBOP) 2111 *mode = IEEE80211_MODE_TURBO_A; 2112 else 2113 *mode = IEEE80211_MODE_STURBO_A; 2114 } else if (*mode == IEEE80211_MODE_11G) 2115 *mode = IEEE80211_MODE_TURBO_G; 2116 else 2117 return 0; 2118 } 2119 /* XXX HT40 +/- */ 2120 return 1; 2121 } 2122 2123 /* 2124 * Handle a media change request on the vap interface. 2125 */ 2126 int 2127 ieee80211_media_change(struct ifnet *ifp) 2128 { 2129 struct ieee80211vap *vap = ifp->if_softc; 2130 struct ifmedia_entry *ime = vap->iv_media.ifm_cur; 2131 uint16_t newmode; 2132 2133 if (!media2mode(ime, vap->iv_flags, &newmode)) 2134 return EINVAL; 2135 if (vap->iv_des_mode != newmode) { 2136 vap->iv_des_mode = newmode; 2137 /* XXX kick state machine if up+running */ 2138 } 2139 return 0; 2140 } 2141 2142 /* 2143 * Common code to calculate the media status word 2144 * from the operating mode and channel state. 2145 */ 2146 static int 2147 media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan) 2148 { 2149 int status; 2150 2151 status = IFM_IEEE80211; 2152 switch (opmode) { 2153 case IEEE80211_M_STA: 2154 break; 2155 case IEEE80211_M_IBSS: 2156 status |= IFM_IEEE80211_ADHOC; 2157 break; 2158 case IEEE80211_M_HOSTAP: 2159 status |= IFM_IEEE80211_HOSTAP; 2160 break; 2161 case IEEE80211_M_MONITOR: 2162 status |= IFM_IEEE80211_MONITOR; 2163 break; 2164 case IEEE80211_M_AHDEMO: 2165 status |= IFM_IEEE80211_ADHOC | IFM_FLAG0; 2166 break; 2167 case IEEE80211_M_WDS: 2168 status |= IFM_IEEE80211_WDS; 2169 break; 2170 case IEEE80211_M_MBSS: 2171 status |= IFM_IEEE80211_MBSS; 2172 break; 2173 } 2174 if (IEEE80211_IS_CHAN_HTA(chan)) { 2175 status |= IFM_IEEE80211_11NA; 2176 } else if (IEEE80211_IS_CHAN_HTG(chan)) { 2177 status |= IFM_IEEE80211_11NG; 2178 } else if (IEEE80211_IS_CHAN_A(chan)) { 2179 status |= IFM_IEEE80211_11A; 2180 } else if (IEEE80211_IS_CHAN_B(chan)) { 2181 status |= IFM_IEEE80211_11B; 2182 } else if (IEEE80211_IS_CHAN_ANYG(chan)) { 2183 status |= IFM_IEEE80211_11G; 2184 } else if (IEEE80211_IS_CHAN_FHSS(chan)) { 2185 status |= IFM_IEEE80211_FH; 2186 } 2187 /* XXX else complain? */ 2188 2189 if (IEEE80211_IS_CHAN_TURBO(chan)) 2190 status |= IFM_IEEE80211_TURBO; 2191 #if 0 2192 if (IEEE80211_IS_CHAN_HT20(chan)) 2193 status |= IFM_IEEE80211_HT20; 2194 if (IEEE80211_IS_CHAN_HT40(chan)) 2195 status |= IFM_IEEE80211_HT40; 2196 #endif 2197 return status; 2198 } 2199 2200 void 2201 ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr) 2202 { 2203 struct ieee80211vap *vap = ifp->if_softc; 2204 struct ieee80211com *ic = vap->iv_ic; 2205 enum ieee80211_phymode mode; 2206 2207 imr->ifm_status = IFM_AVALID; 2208 /* 2209 * NB: use the current channel's mode to lock down a xmit 2210 * rate only when running; otherwise we may have a mismatch 2211 * in which case the rate will not be convertible. 2212 */ 2213 if (vap->iv_state == IEEE80211_S_RUN || 2214 vap->iv_state == IEEE80211_S_SLEEP) { 2215 imr->ifm_status |= IFM_ACTIVE; 2216 mode = ieee80211_chan2mode(ic->ic_curchan); 2217 } else 2218 mode = IEEE80211_MODE_AUTO; 2219 imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan); 2220 /* 2221 * Calculate a current rate if possible. 2222 */ 2223 if (vap->iv_txparms[mode].ucastrate != IEEE80211_FIXED_RATE_NONE) { 2224 /* 2225 * A fixed rate is set, report that. 2226 */ 2227 imr->ifm_active |= ieee80211_rate2media(ic, 2228 vap->iv_txparms[mode].ucastrate, mode); 2229 } else if (vap->iv_opmode == IEEE80211_M_STA) { 2230 /* 2231 * In station mode report the current transmit rate. 2232 */ 2233 imr->ifm_active |= ieee80211_rate2media(ic, 2234 vap->iv_bss->ni_txrate, mode); 2235 } else 2236 imr->ifm_active |= IFM_AUTO; 2237 if (imr->ifm_status & IFM_ACTIVE) 2238 imr->ifm_current = imr->ifm_active; 2239 } 2240 2241 /* 2242 * Set the current phy mode and recalculate the active channel 2243 * set based on the available channels for this mode. Also 2244 * select a new default/current channel if the current one is 2245 * inappropriate for this mode. 2246 */ 2247 int 2248 ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode) 2249 { 2250 /* 2251 * Adjust basic rates in 11b/11g supported rate set. 2252 * Note that if operating on a hal/quarter rate channel 2253 * this is a noop as those rates sets are different 2254 * and used instead. 2255 */ 2256 if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B) 2257 ieee80211_setbasicrates(&ic->ic_sup_rates[mode], mode); 2258 2259 ic->ic_curmode = mode; 2260 ieee80211_reset_erp(ic); /* reset ERP state */ 2261 2262 return 0; 2263 } 2264 2265 /* 2266 * Return the phy mode for with the specified channel. 2267 */ 2268 enum ieee80211_phymode 2269 ieee80211_chan2mode(const struct ieee80211_channel *chan) 2270 { 2271 2272 if (IEEE80211_IS_CHAN_VHT_2GHZ(chan)) 2273 return IEEE80211_MODE_VHT_2GHZ; 2274 else if (IEEE80211_IS_CHAN_VHT_5GHZ(chan)) 2275 return IEEE80211_MODE_VHT_5GHZ; 2276 else if (IEEE80211_IS_CHAN_HTA(chan)) 2277 return IEEE80211_MODE_11NA; 2278 else if (IEEE80211_IS_CHAN_HTG(chan)) 2279 return IEEE80211_MODE_11NG; 2280 else if (IEEE80211_IS_CHAN_108G(chan)) 2281 return IEEE80211_MODE_TURBO_G; 2282 else if (IEEE80211_IS_CHAN_ST(chan)) 2283 return IEEE80211_MODE_STURBO_A; 2284 else if (IEEE80211_IS_CHAN_TURBO(chan)) 2285 return IEEE80211_MODE_TURBO_A; 2286 else if (IEEE80211_IS_CHAN_HALF(chan)) 2287 return IEEE80211_MODE_HALF; 2288 else if (IEEE80211_IS_CHAN_QUARTER(chan)) 2289 return IEEE80211_MODE_QUARTER; 2290 else if (IEEE80211_IS_CHAN_A(chan)) 2291 return IEEE80211_MODE_11A; 2292 else if (IEEE80211_IS_CHAN_ANYG(chan)) 2293 return IEEE80211_MODE_11G; 2294 else if (IEEE80211_IS_CHAN_B(chan)) 2295 return IEEE80211_MODE_11B; 2296 else if (IEEE80211_IS_CHAN_FHSS(chan)) 2297 return IEEE80211_MODE_FH; 2298 2299 /* NB: should not get here */ 2300 printf("%s: cannot map channel to mode; freq %u flags 0x%x\n", 2301 __func__, chan->ic_freq, chan->ic_flags); 2302 return IEEE80211_MODE_11B; 2303 } 2304 2305 struct ratemedia { 2306 u_int match; /* rate + mode */ 2307 u_int media; /* if_media rate */ 2308 }; 2309 2310 static int 2311 findmedia(const struct ratemedia rates[], int n, u_int match) 2312 { 2313 int i; 2314 2315 for (i = 0; i < n; i++) 2316 if (rates[i].match == match) 2317 return rates[i].media; 2318 return IFM_AUTO; 2319 } 2320 2321 /* 2322 * Convert IEEE80211 rate value to ifmedia subtype. 2323 * Rate is either a legacy rate in units of 0.5Mbps 2324 * or an MCS index. 2325 */ 2326 int 2327 ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode) 2328 { 2329 static const struct ratemedia rates[] = { 2330 { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 }, 2331 { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 }, 2332 { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 }, 2333 { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 }, 2334 { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 }, 2335 { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 }, 2336 { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 }, 2337 { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 }, 2338 { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 }, 2339 { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 }, 2340 { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 }, 2341 { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 }, 2342 { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 }, 2343 { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 }, 2344 { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 }, 2345 { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 }, 2346 { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 }, 2347 { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 }, 2348 { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 }, 2349 { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 }, 2350 { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 }, 2351 { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 }, 2352 { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 }, 2353 { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 }, 2354 { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 }, 2355 { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 }, 2356 { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 }, 2357 { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 }, 2358 { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 }, 2359 { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 }, 2360 /* NB: OFDM72 doesn't really exist so we don't handle it */ 2361 }; 2362 static const struct ratemedia htrates[] = { 2363 { 0, IFM_IEEE80211_MCS }, 2364 { 1, IFM_IEEE80211_MCS }, 2365 { 2, IFM_IEEE80211_MCS }, 2366 { 3, IFM_IEEE80211_MCS }, 2367 { 4, IFM_IEEE80211_MCS }, 2368 { 5, IFM_IEEE80211_MCS }, 2369 { 6, IFM_IEEE80211_MCS }, 2370 { 7, IFM_IEEE80211_MCS }, 2371 { 8, IFM_IEEE80211_MCS }, 2372 { 9, IFM_IEEE80211_MCS }, 2373 { 10, IFM_IEEE80211_MCS }, 2374 { 11, IFM_IEEE80211_MCS }, 2375 { 12, IFM_IEEE80211_MCS }, 2376 { 13, IFM_IEEE80211_MCS }, 2377 { 14, IFM_IEEE80211_MCS }, 2378 { 15, IFM_IEEE80211_MCS }, 2379 { 16, IFM_IEEE80211_MCS }, 2380 { 17, IFM_IEEE80211_MCS }, 2381 { 18, IFM_IEEE80211_MCS }, 2382 { 19, IFM_IEEE80211_MCS }, 2383 { 20, IFM_IEEE80211_MCS }, 2384 { 21, IFM_IEEE80211_MCS }, 2385 { 22, IFM_IEEE80211_MCS }, 2386 { 23, IFM_IEEE80211_MCS }, 2387 { 24, IFM_IEEE80211_MCS }, 2388 { 25, IFM_IEEE80211_MCS }, 2389 { 26, IFM_IEEE80211_MCS }, 2390 { 27, IFM_IEEE80211_MCS }, 2391 { 28, IFM_IEEE80211_MCS }, 2392 { 29, IFM_IEEE80211_MCS }, 2393 { 30, IFM_IEEE80211_MCS }, 2394 { 31, IFM_IEEE80211_MCS }, 2395 { 32, IFM_IEEE80211_MCS }, 2396 { 33, IFM_IEEE80211_MCS }, 2397 { 34, IFM_IEEE80211_MCS }, 2398 { 35, IFM_IEEE80211_MCS }, 2399 { 36, IFM_IEEE80211_MCS }, 2400 { 37, IFM_IEEE80211_MCS }, 2401 { 38, IFM_IEEE80211_MCS }, 2402 { 39, IFM_IEEE80211_MCS }, 2403 { 40, IFM_IEEE80211_MCS }, 2404 { 41, IFM_IEEE80211_MCS }, 2405 { 42, IFM_IEEE80211_MCS }, 2406 { 43, IFM_IEEE80211_MCS }, 2407 { 44, IFM_IEEE80211_MCS }, 2408 { 45, IFM_IEEE80211_MCS }, 2409 { 46, IFM_IEEE80211_MCS }, 2410 { 47, IFM_IEEE80211_MCS }, 2411 { 48, IFM_IEEE80211_MCS }, 2412 { 49, IFM_IEEE80211_MCS }, 2413 { 50, IFM_IEEE80211_MCS }, 2414 { 51, IFM_IEEE80211_MCS }, 2415 { 52, IFM_IEEE80211_MCS }, 2416 { 53, IFM_IEEE80211_MCS }, 2417 { 54, IFM_IEEE80211_MCS }, 2418 { 55, IFM_IEEE80211_MCS }, 2419 { 56, IFM_IEEE80211_MCS }, 2420 { 57, IFM_IEEE80211_MCS }, 2421 { 58, IFM_IEEE80211_MCS }, 2422 { 59, IFM_IEEE80211_MCS }, 2423 { 60, IFM_IEEE80211_MCS }, 2424 { 61, IFM_IEEE80211_MCS }, 2425 { 62, IFM_IEEE80211_MCS }, 2426 { 63, IFM_IEEE80211_MCS }, 2427 { 64, IFM_IEEE80211_MCS }, 2428 { 65, IFM_IEEE80211_MCS }, 2429 { 66, IFM_IEEE80211_MCS }, 2430 { 67, IFM_IEEE80211_MCS }, 2431 { 68, IFM_IEEE80211_MCS }, 2432 { 69, IFM_IEEE80211_MCS }, 2433 { 70, IFM_IEEE80211_MCS }, 2434 { 71, IFM_IEEE80211_MCS }, 2435 { 72, IFM_IEEE80211_MCS }, 2436 { 73, IFM_IEEE80211_MCS }, 2437 { 74, IFM_IEEE80211_MCS }, 2438 { 75, IFM_IEEE80211_MCS }, 2439 { 76, IFM_IEEE80211_MCS }, 2440 }; 2441 int m; 2442 2443 /* 2444 * Check 11n rates first for match as an MCS. 2445 */ 2446 if (mode == IEEE80211_MODE_11NA) { 2447 if (rate & IEEE80211_RATE_MCS) { 2448 rate &= ~IEEE80211_RATE_MCS; 2449 m = findmedia(htrates, nitems(htrates), rate); 2450 if (m != IFM_AUTO) 2451 return m | IFM_IEEE80211_11NA; 2452 } 2453 } else if (mode == IEEE80211_MODE_11NG) { 2454 /* NB: 12 is ambiguous, it will be treated as an MCS */ 2455 if (rate & IEEE80211_RATE_MCS) { 2456 rate &= ~IEEE80211_RATE_MCS; 2457 m = findmedia(htrates, nitems(htrates), rate); 2458 if (m != IFM_AUTO) 2459 return m | IFM_IEEE80211_11NG; 2460 } 2461 } 2462 rate &= IEEE80211_RATE_VAL; 2463 switch (mode) { 2464 case IEEE80211_MODE_11A: 2465 case IEEE80211_MODE_HALF: /* XXX good 'nuf */ 2466 case IEEE80211_MODE_QUARTER: 2467 case IEEE80211_MODE_11NA: 2468 case IEEE80211_MODE_TURBO_A: 2469 case IEEE80211_MODE_STURBO_A: 2470 return findmedia(rates, nitems(rates), 2471 rate | IFM_IEEE80211_11A); 2472 case IEEE80211_MODE_11B: 2473 return findmedia(rates, nitems(rates), 2474 rate | IFM_IEEE80211_11B); 2475 case IEEE80211_MODE_FH: 2476 return findmedia(rates, nitems(rates), 2477 rate | IFM_IEEE80211_FH); 2478 case IEEE80211_MODE_AUTO: 2479 /* NB: ic may be NULL for some drivers */ 2480 if (ic != NULL && ic->ic_phytype == IEEE80211_T_FH) 2481 return findmedia(rates, nitems(rates), 2482 rate | IFM_IEEE80211_FH); 2483 /* NB: hack, 11g matches both 11b+11a rates */ 2484 /* fall thru... */ 2485 case IEEE80211_MODE_11G: 2486 case IEEE80211_MODE_11NG: 2487 case IEEE80211_MODE_TURBO_G: 2488 return findmedia(rates, nitems(rates), rate | IFM_IEEE80211_11G); 2489 case IEEE80211_MODE_VHT_2GHZ: 2490 case IEEE80211_MODE_VHT_5GHZ: 2491 /* XXX TODO: need to figure out mapping for VHT rates */ 2492 return IFM_AUTO; 2493 } 2494 return IFM_AUTO; 2495 } 2496 2497 int 2498 ieee80211_media2rate(int mword) 2499 { 2500 static const int ieeerates[] = { 2501 -1, /* IFM_AUTO */ 2502 0, /* IFM_MANUAL */ 2503 0, /* IFM_NONE */ 2504 2, /* IFM_IEEE80211_FH1 */ 2505 4, /* IFM_IEEE80211_FH2 */ 2506 2, /* IFM_IEEE80211_DS1 */ 2507 4, /* IFM_IEEE80211_DS2 */ 2508 11, /* IFM_IEEE80211_DS5 */ 2509 22, /* IFM_IEEE80211_DS11 */ 2510 44, /* IFM_IEEE80211_DS22 */ 2511 12, /* IFM_IEEE80211_OFDM6 */ 2512 18, /* IFM_IEEE80211_OFDM9 */ 2513 24, /* IFM_IEEE80211_OFDM12 */ 2514 36, /* IFM_IEEE80211_OFDM18 */ 2515 48, /* IFM_IEEE80211_OFDM24 */ 2516 72, /* IFM_IEEE80211_OFDM36 */ 2517 96, /* IFM_IEEE80211_OFDM48 */ 2518 108, /* IFM_IEEE80211_OFDM54 */ 2519 144, /* IFM_IEEE80211_OFDM72 */ 2520 0, /* IFM_IEEE80211_DS354k */ 2521 0, /* IFM_IEEE80211_DS512k */ 2522 6, /* IFM_IEEE80211_OFDM3 */ 2523 9, /* IFM_IEEE80211_OFDM4 */ 2524 54, /* IFM_IEEE80211_OFDM27 */ 2525 -1, /* IFM_IEEE80211_MCS */ 2526 -1, /* IFM_IEEE80211_VHT */ 2527 }; 2528 return IFM_SUBTYPE(mword) < nitems(ieeerates) ? 2529 ieeerates[IFM_SUBTYPE(mword)] : 0; 2530 } 2531 2532 /* 2533 * The following hash function is adapted from "Hash Functions" by Bob Jenkins 2534 * ("Algorithm Alley", Dr. Dobbs Journal, September 1997). 2535 */ 2536 #define mix(a, b, c) \ 2537 do { \ 2538 a -= b; a -= c; a ^= (c >> 13); \ 2539 b -= c; b -= a; b ^= (a << 8); \ 2540 c -= a; c -= b; c ^= (b >> 13); \ 2541 a -= b; a -= c; a ^= (c >> 12); \ 2542 b -= c; b -= a; b ^= (a << 16); \ 2543 c -= a; c -= b; c ^= (b >> 5); \ 2544 a -= b; a -= c; a ^= (c >> 3); \ 2545 b -= c; b -= a; b ^= (a << 10); \ 2546 c -= a; c -= b; c ^= (b >> 15); \ 2547 } while (/*CONSTCOND*/0) 2548 2549 uint32_t 2550 ieee80211_mac_hash(const struct ieee80211com *ic, 2551 const uint8_t addr[IEEE80211_ADDR_LEN]) 2552 { 2553 uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = ic->ic_hash_key; 2554 2555 b += addr[5] << 8; 2556 b += addr[4]; 2557 a += addr[3] << 24; 2558 a += addr[2] << 16; 2559 a += addr[1] << 8; 2560 a += addr[0]; 2561 2562 mix(a, b, c); 2563 2564 return c; 2565 } 2566 #undef mix 2567 2568 char 2569 ieee80211_channel_type_char(const struct ieee80211_channel *c) 2570 { 2571 if (IEEE80211_IS_CHAN_ST(c)) 2572 return 'S'; 2573 if (IEEE80211_IS_CHAN_108A(c)) 2574 return 'T'; 2575 if (IEEE80211_IS_CHAN_108G(c)) 2576 return 'G'; 2577 if (IEEE80211_IS_CHAN_VHT(c)) 2578 return 'v'; 2579 if (IEEE80211_IS_CHAN_HT(c)) 2580 return 'n'; 2581 if (IEEE80211_IS_CHAN_A(c)) 2582 return 'a'; 2583 if (IEEE80211_IS_CHAN_ANYG(c)) 2584 return 'g'; 2585 if (IEEE80211_IS_CHAN_B(c)) 2586 return 'b'; 2587 return 'f'; 2588 } 2589
Indexes created Thu Oct 02 10:09:58 GMT 2025