ieee80211.c revision 1.56.18.8
1 /* $NetBSD: ieee80211.c,v 1.56.18.8 2020/04/13 08:05:15 martin 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 __NetBSD__ 33 __KERNEL_RCSID(0, "$NetBSD: ieee80211.c,v 1.56.18.8 2020/04/13 08:05:15 martin Exp $"); 34 #endif 35 36 /* 37 * IEEE 802.11 generic handler 38 */ 39 #ifdef _KERNEL_OPT 40 #include "opt_wlan.h" 41 #endif 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/kernel.h> 46 #include <sys/malloc.h> 47 #include <sys/socket.h> 48 #include <sys/sbuf.h> 49 50 #ifdef __FreeBSD__ 51 #include <machine/stdarg.h> 52 #elif __NetBSD__ 53 #include <sys/once.h> 54 #include <sys/stdarg.h> 55 #else 56 #error 57 #endif 58 59 #include <net/if.h> 60 #ifdef __FreeBSD__ 61 #include <net/if_var.h> 62 #endif 63 #include <net/if_dl.h> 64 #include <net/if_media.h> 65 #include <net/if_types.h> 66 #ifdef __FreeBSD__ 67 #include <net/ethernet.h> 68 #endif 69 #ifdef __NetBSD__ 70 #include <net/route.h> 71 #include <net/if_ether.h> 72 #endif 73 74 #include <net80211/ieee80211_var.h> 75 #include <net80211/ieee80211_regdomain.h> 76 #ifdef IEEE80211_SUPPORT_SUPERG 77 #include <net80211/ieee80211_superg.h> 78 #endif 79 #include <net80211/ieee80211_ratectl.h> 80 #include <net80211/ieee80211_vht.h> 81 82 #include <net/bpf.h> 83 84 #ifdef __NetBSD__ 85 #undef KASSERT 86 #define KASSERT(__cond, __complaint) FBSDKASSERT(__cond, __complaint) 87 #endif 88 89 const char *ieee80211_phymode_name[IEEE80211_MODE_MAX] = { 90 [IEEE80211_MODE_AUTO] = "auto", 91 [IEEE80211_MODE_11A] = "11a", 92 [IEEE80211_MODE_11B] = "11b", 93 [IEEE80211_MODE_11G] = "11g", 94 [IEEE80211_MODE_FH] = "FH", 95 [IEEE80211_MODE_TURBO_A] = "turboA", 96 [IEEE80211_MODE_TURBO_G] = "turboG", 97 [IEEE80211_MODE_STURBO_A] = "sturboA", 98 [IEEE80211_MODE_HALF] = "half", 99 [IEEE80211_MODE_QUARTER] = "quarter", 100 [IEEE80211_MODE_11NA] = "11na", 101 [IEEE80211_MODE_11NG] = "11ng", 102 [IEEE80211_MODE_VHT_2GHZ] = "11acg", 103 [IEEE80211_MODE_VHT_5GHZ] = "11ac", 104 }; 105 /* map ieee80211_opmode to the corresponding capability bit */ 106 const int ieee80211_opcap[IEEE80211_OPMODE_MAX] = { 107 [IEEE80211_M_IBSS] = IEEE80211_C_IBSS, 108 [IEEE80211_M_WDS] = IEEE80211_C_WDS, 109 [IEEE80211_M_STA] = IEEE80211_C_STA, 110 [IEEE80211_M_AHDEMO] = IEEE80211_C_AHDEMO, 111 [IEEE80211_M_HOSTAP] = IEEE80211_C_HOSTAP, 112 [IEEE80211_M_MONITOR] = IEEE80211_C_MONITOR, 113 #ifdef IEEE80211_SUPPORT_MESH 114 [IEEE80211_M_MBSS] = IEEE80211_C_MBSS, 115 #endif 116 }; 117 118 const uint8_t ieee80211broadcastaddr[IEEE80211_ADDR_LEN] = 119 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 120 121 static void ieee80211_syncflag_locked(struct ieee80211com *ic, int flag); 122 static void ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag); 123 static void ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag); 124 static void ieee80211_syncflag_vht_locked(struct ieee80211com *ic, int flag); 125 static int ieee80211_media_setup(struct ieee80211com *ic, 126 struct ifmedia *media, int caps, int addsta, 127 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat); 128 static int media_status(enum ieee80211_opmode, 129 const struct ieee80211_channel *); 130 static uint64_t ieee80211_get_counter(struct ifnet *, ift_counter); 131 132 133 MALLOC_DEFINE(M_80211_VAP, "80211vap", "802.11 vap state"); 134 135 /* 136 * Default supported rates for 802.11 operation (in IEEE .5Mb units). 137 */ 138 #define B(r) ((r) | IEEE80211_RATE_BASIC) 139 static const struct ieee80211_rateset ieee80211_rateset_11a = 140 { 8, { B(12), 18, B(24), 36, B(48), 72, 96, 108 } }; 141 static const struct ieee80211_rateset ieee80211_rateset_half = 142 { 8, { B(6), 9, B(12), 18, B(24), 36, 48, 54 } }; 143 static const struct ieee80211_rateset ieee80211_rateset_quarter = 144 { 8, { B(3), 4, B(6), 9, B(12), 18, 24, 27 } }; 145 static const struct ieee80211_rateset ieee80211_rateset_11b = 146 { 4, { B(2), B(4), B(11), B(22) } }; 147 /* NB: OFDM rates are handled specially based on mode */ 148 static const struct ieee80211_rateset ieee80211_rateset_11g = 149 { 12, { B(2), B(4), B(11), B(22), 12, 18, 24, 36, 48, 72, 96, 108 } }; 150 #undef B 151 152 static int set_vht_extchan(struct ieee80211_channel *c); 153 154 /* 155 * Fill in 802.11 available channel set, mark 156 * all available channels as active, and pick 157 * a default channel if not already specified. 158 */ 159 void 160 ieee80211_chan_init(struct ieee80211com *ic) 161 { 162 #define DEFAULTRATES(m, def) do { \ 163 if (ic->ic_sup_rates[m].rs_nrates == 0) \ 164 ic->ic_sup_rates[m] = def; \ 165 } while (0) 166 struct ieee80211_channel *c; 167 int i; 168 169 KASSERT(0 < ic->ic_nchans && ic->ic_nchans <= IEEE80211_CHAN_MAX, 170 ("invalid number of channels specified: %u", ic->ic_nchans)); 171 memset(ic->ic_chan_avail, 0, sizeof(ic->ic_chan_avail)); 172 memset(ic->ic_modecaps, 0, sizeof(ic->ic_modecaps)); 173 setbit(ic->ic_modecaps, IEEE80211_MODE_AUTO); 174 for (i = 0; i < ic->ic_nchans; i++) { 175 c = &ic->ic_channels[i]; 176 KASSERT(c->ic_flags != 0, ("channel with no flags")); 177 /* 178 * Help drivers that work only with frequencies by filling 179 * in IEEE channel #'s if not already calculated. Note this 180 * mimics similar work done in ieee80211_setregdomain when 181 * changing regulatory state. 182 */ 183 if (c->ic_ieee == 0) 184 c->ic_ieee = ieee80211_mhz2ieee(c->ic_freq,c->ic_flags); 185 186 /* 187 * Setup the HT40/VHT40 upper/lower bits. 188 * The VHT80 math is done elsewhere. 189 */ 190 if (IEEE80211_IS_CHAN_HT40(c) && c->ic_extieee == 0) 191 c->ic_extieee = ieee80211_mhz2ieee(c->ic_freq + 192 (IEEE80211_IS_CHAN_HT40U(c) ? 20 : -20), 193 c->ic_flags); 194 195 /* Update VHT math */ 196 /* 197 * XXX VHT again, note that this assumes VHT80 channels 198 * are legit already 199 */ 200 set_vht_extchan(c); 201 202 /* default max tx power to max regulatory */ 203 if (c->ic_maxpower == 0) 204 c->ic_maxpower = 2*c->ic_maxregpower; 205 setbit(ic->ic_chan_avail, c->ic_ieee); 206 /* 207 * Identify mode capabilities. 208 */ 209 if (IEEE80211_IS_CHAN_A(c)) 210 setbit(ic->ic_modecaps, IEEE80211_MODE_11A); 211 if (IEEE80211_IS_CHAN_B(c)) 212 setbit(ic->ic_modecaps, IEEE80211_MODE_11B); 213 if (IEEE80211_IS_CHAN_ANYG(c)) 214 setbit(ic->ic_modecaps, IEEE80211_MODE_11G); 215 if (IEEE80211_IS_CHAN_FHSS(c)) 216 setbit(ic->ic_modecaps, IEEE80211_MODE_FH); 217 if (IEEE80211_IS_CHAN_108A(c)) 218 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_A); 219 if (IEEE80211_IS_CHAN_108G(c)) 220 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_G); 221 if (IEEE80211_IS_CHAN_ST(c)) 222 setbit(ic->ic_modecaps, IEEE80211_MODE_STURBO_A); 223 if (IEEE80211_IS_CHAN_HALF(c)) 224 setbit(ic->ic_modecaps, IEEE80211_MODE_HALF); 225 if (IEEE80211_IS_CHAN_QUARTER(c)) 226 setbit(ic->ic_modecaps, IEEE80211_MODE_QUARTER); 227 if (IEEE80211_IS_CHAN_HTA(c)) 228 setbit(ic->ic_modecaps, IEEE80211_MODE_11NA); 229 if (IEEE80211_IS_CHAN_HTG(c)) 230 setbit(ic->ic_modecaps, IEEE80211_MODE_11NG); 231 if (IEEE80211_IS_CHAN_VHTA(c)) 232 setbit(ic->ic_modecaps, IEEE80211_MODE_VHT_5GHZ); 233 if (IEEE80211_IS_CHAN_VHTG(c)) 234 setbit(ic->ic_modecaps, IEEE80211_MODE_VHT_2GHZ); 235 } 236 /* initialize candidate channels to all available */ 237 memcpy(ic->ic_chan_active, ic->ic_chan_avail, 238 sizeof(ic->ic_chan_avail)); 239 240 /* sort channel table to allow lookup optimizations */ 241 ieee80211_sort_channels(ic->ic_channels, ic->ic_nchans); 242 243 /* invalidate any previous state */ 244 ic->ic_bsschan = IEEE80211_CHAN_ANYC; 245 ic->ic_prevchan = NULL; 246 ic->ic_csa_newchan = NULL; 247 /* arbitrarily pick the first channel */ 248 ic->ic_curchan = &ic->ic_channels[0]; 249 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 250 251 /* fillin well-known rate sets if driver has not specified */ 252 DEFAULTRATES(IEEE80211_MODE_11B, ieee80211_rateset_11b); 253 DEFAULTRATES(IEEE80211_MODE_11G, ieee80211_rateset_11g); 254 DEFAULTRATES(IEEE80211_MODE_11A, ieee80211_rateset_11a); 255 DEFAULTRATES(IEEE80211_MODE_TURBO_A, ieee80211_rateset_11a); 256 DEFAULTRATES(IEEE80211_MODE_TURBO_G, ieee80211_rateset_11g); 257 DEFAULTRATES(IEEE80211_MODE_STURBO_A, ieee80211_rateset_11a); 258 DEFAULTRATES(IEEE80211_MODE_HALF, ieee80211_rateset_half); 259 DEFAULTRATES(IEEE80211_MODE_QUARTER, ieee80211_rateset_quarter); 260 DEFAULTRATES(IEEE80211_MODE_11NA, ieee80211_rateset_11a); 261 DEFAULTRATES(IEEE80211_MODE_11NG, ieee80211_rateset_11g); 262 DEFAULTRATES(IEEE80211_MODE_VHT_2GHZ, ieee80211_rateset_11g); 263 DEFAULTRATES(IEEE80211_MODE_VHT_5GHZ, ieee80211_rateset_11a); 264 265 /* 266 * Setup required information to fill the mcsset field, if driver did 267 * not. Assume a 2T2R setup for historic reasons. 268 */ 269 if (ic->ic_rxstream == 0) 270 ic->ic_rxstream = 2; 271 if (ic->ic_txstream == 0) 272 ic->ic_txstream = 2; 273 274 ieee80211_init_suphtrates(ic); 275 276 /* 277 * Set auto mode to reset active channel state and any desired channel. 278 */ 279 (void) ieee80211_setmode(ic, IEEE80211_MODE_AUTO); 280 #undef DEFAULTRATES 281 } 282 283 static void 284 null_update_mcast(struct ieee80211com *ic) 285 { 286 287 ic_printf(ic, "need multicast update callback\n"); 288 } 289 290 static void 291 null_update_promisc(struct ieee80211com *ic) 292 { 293 294 ic_printf(ic, "need promiscuous mode update callback\n"); 295 } 296 297 static void 298 null_update_chw(struct ieee80211com *ic) 299 { 300 301 ic_printf(ic, "%s: need callback\n", __func__); 302 } 303 304 #ifdef __FreeBSD__ 305 int 306 ic_printf(struct ieee80211com *ic, const char * fmt, ...) 307 { 308 va_list ap; 309 int retval; 310 311 retval = printf("%s: ", ic->ic_name); 312 va_start(ap, fmt); 313 retval += vprintf(fmt, ap); 314 va_end(ap); 315 return (retval); 316 } 317 #elif __NetBSD__ 318 void 319 ic_printf(struct ieee80211com *ic, const char * fmt, ...) 320 { 321 va_list ap; 322 323 printf("%s: ", ic->ic_name); 324 va_start(ap, fmt); 325 vprintf(fmt, ap); 326 va_end(ap); 327 } 328 #endif 329 330 static LIST_HEAD(, ieee80211com) ic_head = LIST_HEAD_INITIALIZER(ic_head); 331 #ifdef __FreeBSD__ 332 static struct mtx ic_list_mtx; 333 MTX_SYSINIT(ic_list, &ic_list_mtx, "ieee80211com list", MTX_DEF); 334 #elif __NetBSD__ 335 static kmutex_t ic_list_mtx; 336 #endif 337 338 #if notyet 339 static int 340 sysctl_ieee80211coms(SYSCTL_HANDLER_ARGS) 341 { 342 struct ieee80211com *ic; 343 struct sbuf sb; 344 char *sp; 345 int error; 346 347 error = sysctl_wire_old_buffer(req, 0); 348 if (error) 349 return (error); 350 sbuf_new_for_sysctl(&sb, NULL, 8, req); 351 sbuf_clear_flags(&sb, SBUF_INCLUDENUL); 352 sp = ""; 353 mtx_lock(&ic_list_mtx); 354 LIST_FOREACH(ic, &ic_head, ic_next) { 355 sbuf_printf(&sb, "%s%s", sp, ic->ic_name); 356 sp = " "; 357 } 358 mtx_unlock(&ic_list_mtx); 359 error = sbuf_finish(&sb); 360 sbuf_delete(&sb); 361 return (error); 362 } 363 364 SYSCTL_PROC(_net_wlan, OID_AUTO, devices, 365 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, 366 sysctl_ieee80211coms, "A", "names of available 802.11 devices"); 367 #endif 368 369 #if __NetBSD__ 370 static int 371 ic_list_mtx_init (void) 372 { 373 mutex_init(&ic_list_mtx, MUTEX_DEFAULT, IPL_NET); 374 ieee80211_auth_setup(); 375 return 0; 376 } 377 #endif 378 379 /* 380 * Attach/setup the common net80211 state. Called by 381 * the driver on attach to prior to creating any vap's. 382 */ 383 void 384 ieee80211_ifattach(struct ieee80211com *ic) 385 { 386 #if __NetBSD__ 387 static ONCE_DECL(ic_list_mtx_once); 388 RUN_ONCE(&ic_list_mtx_once, ic_list_mtx_init); 389 #endif 390 391 IEEE80211_LOCK_INIT(ic, ic->ic_name); 392 IEEE80211_TX_LOCK_INIT(ic, ic->ic_name); 393 TAILQ_INIT(&ic->ic_vaps); 394 395 #if __FreeBSD__ 396 /* Create a taskqueue for all state changes */ 397 ic->ic_tq = taskqueue_create("ic_taskq", M_WAITOK | M_ZERO, 398 taskqueue_thread_enqueue, &ic->ic_tq); 399 taskqueue_start_threads(&ic->ic_tq, 1, PI_NET, "%s net80211 taskq", 400 ic->ic_name); 401 ic->ic_ierrors = counter_u64_alloc(M_WAITOK); 402 ic->ic_oerrors = counter_u64_alloc(M_WAITOK); 403 #elif __NetBSD__ 404 /* 405 * Create a workqueue for all state changes, ieee80211_netbsd.* 406 * has glue to translate taskqueue functions to workqueue. 407 */ 408 if (workqueue_create(&ic->ic_tq, "net80211_wq", 409 ieee80211_runwork, ic, PRI_SOFTNET, IPL_NET, WQ_MPSAFE)) 410 panic("net80211 workqueue not created"); 411 ic->ic_ierrors = 0; 412 ic->ic_oerrors = 0; 413 #endif 414 415 /* 416 * Fill in 802.11 available channel set, mark all 417 * available channels as active, and pick a default 418 * channel if not already specified. 419 */ 420 ieee80211_chan_init(ic); 421 422 ic->ic_update_mcast = null_update_mcast; 423 ic->ic_update_promisc = null_update_promisc; 424 ic->ic_update_chw = null_update_chw; 425 426 ic->ic_hash_key = arc4random(); 427 ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT; 428 ic->ic_lintval = ic->ic_bintval; 429 ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX; 430 431 ieee80211_crypto_attach(ic); 432 ieee80211_node_attach(ic); 433 ieee80211_power_attach(ic); 434 ieee80211_proto_attach(ic); 435 #ifdef IEEE80211_SUPPORT_SUPERG 436 ieee80211_superg_attach(ic); 437 #endif 438 ieee80211_ht_attach(ic); 439 ieee80211_vht_attach(ic); 440 ieee80211_scan_attach(ic); 441 ieee80211_regdomain_attach(ic); 442 ieee80211_dfs_attach(ic); 443 444 ieee80211_sysctl_attach(ic); 445 446 mtx_lock(&ic_list_mtx); 447 LIST_INSERT_HEAD(&ic_head, ic, ic_next); 448 mtx_unlock(&ic_list_mtx); 449 } 450 451 /* 452 * Detach net80211 state on device detach. Tear down 453 * all vap's and reclaim all common state prior to the 454 * device state going away. Note we may call back into 455 * driver; it must be prepared for this. 456 */ 457 void 458 ieee80211_ifdetach(struct ieee80211com *ic) 459 { 460 struct ieee80211vap *vap; 461 462 mtx_lock(&ic_list_mtx); 463 LIST_REMOVE(ic, ic_next); 464 mtx_unlock(&ic_list_mtx); 465 466 #if __FreeBSD__ 467 taskqueue_drain(taskqueue_thread, &ic->ic_restart_task); 468 #endif 469 470 /* 471 * The VAP is responsible for setting and clearing 472 * the VIMAGE context. 473 */ 474 while ((vap = TAILQ_FIRST(&ic->ic_vaps)) != NULL) 475 ieee80211_vap_destroy(vap); 476 ieee80211_waitfor_parent(ic); 477 478 ieee80211_sysctl_detach(ic); 479 ieee80211_dfs_detach(ic); 480 ieee80211_regdomain_detach(ic); 481 ieee80211_scan_detach(ic); 482 #ifdef IEEE80211_SUPPORT_SUPERG 483 ieee80211_superg_detach(ic); 484 #endif 485 ieee80211_vht_detach(ic); 486 ieee80211_ht_detach(ic); 487 /* NB: must be called before ieee80211_node_detach */ 488 ieee80211_proto_detach(ic); 489 ieee80211_crypto_detach(ic); 490 ieee80211_power_detach(ic); 491 ieee80211_node_detach(ic); 492 493 counter_u64_free(ic->ic_ierrors); 494 counter_u64_free(ic->ic_oerrors); 495 496 taskqueue_free(ic->ic_tq); 497 IEEE80211_TX_LOCK_DESTROY(ic); 498 IEEE80211_LOCK_DESTROY(ic); 499 } 500 501 struct ieee80211com * 502 ieee80211_find_com(const char *name) 503 { 504 struct ieee80211com *ic; 505 506 mtx_lock(&ic_list_mtx); 507 LIST_FOREACH(ic, &ic_head, ic_next) 508 if (strcmp(ic->ic_name, name) == 0) 509 break; 510 mtx_unlock(&ic_list_mtx); 511 512 return (ic); 513 } 514 515 void 516 ieee80211_iterate_coms(ieee80211_com_iter_func *f, void *arg) 517 { 518 struct ieee80211com *ic; 519 520 mtx_lock(&ic_list_mtx); 521 LIST_FOREACH(ic, &ic_head, ic_next) 522 (*f)(arg, ic); 523 mtx_unlock(&ic_list_mtx); 524 } 525 526 /* 527 * Default reset method for use with the ioctl support. This 528 * method is invoked after any state change in the 802.11 529 * layer that should be propagated to the hardware but not 530 * require re-initialization of the 802.11 state machine (e.g 531 * rescanning for an ap). We always return ENETRESET which 532 * should cause the driver to re-initialize the device. Drivers 533 * can override this method to implement more optimized support. 534 */ 535 static int 536 default_reset(struct ieee80211vap *vap, u_long cmd) 537 { 538 return ENETRESET; 539 } 540 541 /* 542 * Default for updating the VAP default TX key index. 543 * 544 * Drivers that support TX offload as well as hardware encryption offload 545 * may need to be informed of key index changes separate from the key 546 * update. 547 */ 548 static void 549 default_update_deftxkey(struct ieee80211vap *vap, ieee80211_keyix kid) 550 { 551 552 /* XXX assert validity */ 553 /* XXX assert we're in a key update block */ 554 vap->iv_def_txkey = kid; 555 } 556 557 /* 558 * Add underlying device errors to vap errors. 559 */ 560 static __unused uint64_t 561 ieee80211_get_counter(struct ifnet *ifp, ift_counter cnt) 562 { 563 struct ieee80211vap *vap = ifp->if_softc; 564 struct ieee80211com *ic = vap->iv_ic; 565 uint64_t rv; 566 567 rv = if_get_counter_default(ifp, cnt); 568 switch (cnt) { 569 case IFCOUNTER_OERRORS: 570 rv += counter_u64_fetch(ic->ic_oerrors); 571 break; 572 case IFCOUNTER_IERRORS: 573 rv += counter_u64_fetch(ic->ic_ierrors); 574 break; 575 default: 576 break; 577 } 578 579 return (rv); 580 } 581 582 /* 583 * Prepare a vap for use. Drivers use this call to 584 * setup net80211 state in new vap's prior attaching 585 * them with ieee80211_vap_attach (below). 586 */ 587 int 588 ieee80211_vap_setup(struct ieee80211com *ic, struct ieee80211vap *vap, 589 const char name[IFNAMSIZ], int unit, enum ieee80211_opmode opmode, 590 int flags, const uint8_t bssid[IEEE80211_ADDR_LEN]) 591 { 592 struct ifnet *ifp; 593 594 ifp = if_alloc(IFT_ETHER); 595 if (ifp == NULL) { 596 ic_printf(ic, "%s: unable to allocate ifnet\n", 597 __func__); 598 return ENOMEM; 599 } 600 #if __NetBSD__ 601 if_initialize(ifp); 602 #endif 603 if_initname(ifp, name, unit); 604 ifp->if_softc = vap; /* back pointer */ 605 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 606 ifp->if_transmit = ieee80211_vap_transmit; 607 #if __FreeBSD__ 608 ifp->if_qflush = ieee80211_vap_qflush; 609 #endif 610 ifp->if_ioctl = ieee80211_ioctl; 611 ifp->if_init = ieee80211_init; 612 613 #if notyet 614 ifp->if_get_counter = ieee80211_get_counter; 615 #endif 616 vap->iv_ifp = ifp; 617 vap->iv_ic = ic; 618 vap->iv_flags = ic->ic_flags; /* propagate common flags */ 619 vap->iv_flags_ext = ic->ic_flags_ext; 620 vap->iv_flags_ven = ic->ic_flags_ven; 621 vap->iv_caps = ic->ic_caps &~ IEEE80211_C_OPMODE; 622 623 /* 11n capabilities - XXX methodize */ 624 vap->iv_htcaps = ic->ic_htcaps; 625 vap->iv_htextcaps = ic->ic_htextcaps; 626 627 /* 11ac capabilities - XXX methodize */ 628 vap->iv_vhtcaps = ic->ic_vhtcaps; 629 vap->iv_vhtextcaps = ic->ic_vhtextcaps; 630 631 vap->iv_opmode = opmode; 632 vap->iv_caps |= ieee80211_opcap[opmode]; 633 /* NNN Done in vap_attach, where is the correct place? */ 634 IEEE80211_ADDR_COPY(vap->iv_myaddr, ic->ic_macaddr); 635 switch (opmode) { 636 case IEEE80211_M_WDS: 637 /* 638 * WDS links must specify the bssid of the far end. 639 * For legacy operation this is a static relationship. 640 * For non-legacy operation the station must associate 641 * and be authorized to pass traffic. Plumbing the 642 * vap to the proper node happens when the vap 643 * transitions to RUN state. 644 */ 645 IEEE80211_ADDR_COPY(vap->iv_des_bssid, bssid); 646 vap->iv_flags |= IEEE80211_F_DESBSSID; 647 if (flags & IEEE80211_CLONE_WDSLEGACY) 648 vap->iv_flags_ext |= IEEE80211_FEXT_WDSLEGACY; 649 break; 650 #ifdef IEEE80211_SUPPORT_TDMA 651 case IEEE80211_M_AHDEMO: 652 if (flags & IEEE80211_CLONE_TDMA) { 653 /* NB: checked before clone operation allowed */ 654 KASSERT(ic->ic_caps & IEEE80211_C_TDMA, 655 ("not TDMA capable, ic_caps 0x%x", ic->ic_caps)); 656 /* 657 * Propagate TDMA capability to mark vap; this 658 * cannot be removed and is used to distinguish 659 * regular ahdemo operation from ahdemo+tdma. 660 */ 661 vap->iv_caps |= IEEE80211_C_TDMA; 662 } 663 break; 664 #endif 665 default: 666 break; 667 } 668 /* auto-enable s/w beacon miss support */ 669 if (flags & IEEE80211_CLONE_NOBEACONS) 670 vap->iv_flags_ext |= IEEE80211_FEXT_SWBMISS; 671 /* auto-generated or user supplied MAC address */ 672 if (flags & (IEEE80211_CLONE_BSSID|IEEE80211_CLONE_MACADDR)) 673 vap->iv_flags_ext |= IEEE80211_FEXT_UNIQMAC; 674 /* 675 * Enable various functionality by default if we're 676 * capable; the driver can override us if it knows better. 677 */ 678 if (vap->iv_caps & IEEE80211_C_WME) 679 vap->iv_flags |= IEEE80211_F_WME; 680 if (vap->iv_caps & IEEE80211_C_BURST) 681 vap->iv_flags |= IEEE80211_F_BURST; 682 /* NB: bg scanning only makes sense for station mode right now */ 683 if (vap->iv_opmode == IEEE80211_M_STA && 684 (vap->iv_caps & IEEE80211_C_BGSCAN)) 685 vap->iv_flags |= IEEE80211_F_BGSCAN; 686 vap->iv_flags |= IEEE80211_F_DOTH; /* XXX no cap, just ena */ 687 /* NB: DFS support only makes sense for ap mode right now */ 688 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 689 (vap->iv_caps & IEEE80211_C_DFS)) 690 vap->iv_flags_ext |= IEEE80211_FEXT_DFS; 691 692 vap->iv_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */ 693 vap->iv_bmissthreshold = IEEE80211_HWBMISS_DEFAULT; 694 vap->iv_dtim_period = IEEE80211_DTIM_DEFAULT; 695 /* 696 * Install a default reset method for the ioctl support; 697 * the driver can override this. 698 */ 699 vap->iv_reset = default_reset; 700 701 /* 702 * Install a default crypto key update method, the driver 703 * can override this. 704 */ 705 vap->iv_update_deftxkey = default_update_deftxkey; 706 707 ieee80211_sysctl_vattach(vap); 708 ieee80211_crypto_vattach(vap); 709 ieee80211_node_vattach(vap); 710 ieee80211_power_vattach(vap); 711 ieee80211_proto_vattach(vap); 712 #ifdef IEEE80211_SUPPORT_SUPERG 713 ieee80211_superg_vattach(vap); 714 #endif 715 ieee80211_ht_vattach(vap); 716 ieee80211_vht_vattach(vap); 717 ieee80211_scan_vattach(vap); 718 ieee80211_regdomain_vattach(vap); 719 ieee80211_radiotap_vattach(vap); 720 ieee80211_ratectl_set(vap, IEEE80211_RATECTL_NONE); 721 722 return 0; 723 } 724 725 /* 726 * Activate a vap. State should have been prepared with a 727 * call to ieee80211_vap_setup and by the driver. On return 728 * from this call the vap is ready for use. 729 */ 730 int 731 ieee80211_vap_attach(struct ieee80211vap *vap, ifm_change_cb_t media_change, 732 ifm_stat_cb_t media_stat, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 733 { 734 struct ifnet *ifp = vap->iv_ifp; 735 struct ieee80211com *ic = vap->iv_ic; 736 struct ifmediareq imr; 737 int maxrate; 738 739 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 740 "%s: %s parent %s flags 0x%x flags_ext 0x%x\n", 741 __func__, ieee80211_opmode_name[vap->iv_opmode], 742 ic->ic_name, vap->iv_flags, vap->iv_flags_ext); 743 744 /* 745 * Do late attach work that cannot happen until after 746 * the driver has had a chance to override defaults. 747 */ 748 ieee80211_node_latevattach(vap); 749 ieee80211_power_latevattach(vap); 750 751 maxrate = ieee80211_media_setup(ic, &vap->iv_media, vap->iv_caps, 752 vap->iv_opmode == IEEE80211_M_STA, media_change, media_stat); 753 ieee80211_media_status(ifp, &imr); 754 /* NB: strip explicit mode; we're actually in autoselect */ 755 ifmedia_set(&vap->iv_media, 756 imr.ifm_active &~ (IFM_MMASK | IFM_IEEE80211_TURBO)); 757 if (maxrate) 758 ifp->if_baudrate = IF_Mbps(maxrate); 759 760 ether_ifattach(ifp, macaddr); 761 /* NNN also done in vap_setup, which is correct? */ 762 IEEE80211_ADDR_COPY(vap->iv_myaddr, IF_LLADDR(ifp)); 763 764 /* hook output method setup by ether_ifattach */ 765 vap->iv_output = ifp->if_output; 766 ifp->if_output = ieee80211_output; 767 768 /* NB: if_mtu set by ether_ifattach to ETHERMTU */ 769 770 IEEE80211_LOCK(ic); 771 TAILQ_INSERT_TAIL(&ic->ic_vaps, vap, iv_next); 772 ieee80211_syncflag_locked(ic, IEEE80211_F_WME); 773 #ifdef IEEE80211_SUPPORT_SUPERG 774 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); 775 #endif 776 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); 777 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); 778 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT); 779 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40); 780 781 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_VHT); 782 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT40); 783 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT80); 784 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT80P80); 785 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT160); 786 IEEE80211_UNLOCK(ic); 787 788 #if __NetBSD__ 789 if_register(ifp); 790 #endif 791 792 return 1; 793 } 794 795 /* 796 * Tear down vap state and reclaim the ifnet. 797 * The driver is assumed to have prepared for 798 * this; e.g. by turning off interrupts for the 799 * underlying device. 800 */ 801 void 802 ieee80211_vap_detach(struct ieee80211vap *vap) 803 { 804 struct ieee80211com *ic = vap->iv_ic; 805 struct ifnet *ifp = vap->iv_ifp; 806 807 CURVNET_SET(ifp->if_vnet); 808 809 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s parent %s\n", 810 __func__, ieee80211_opmode_name[vap->iv_opmode], ic->ic_name); 811 812 /* NB: bpfdetach is called by ether_ifdetach and claims all taps */ 813 ether_ifdetach(ifp); 814 815 ieee80211_stop(vap); 816 817 /* 818 * Flush any deferred vap tasks. 819 */ 820 ieee80211_draintask(ic, &vap->iv_nstate_task); 821 ieee80211_draintask(ic, &vap->iv_swbmiss_task); 822 ieee80211_draintask(ic, &vap->iv_wme_task); 823 ieee80211_draintask(ic, &ic->ic_parent_task); 824 825 #if __FreeBSD__ 826 /* XXX band-aid until ifnet handles this for us */ 827 taskqueue_drain(taskqueue_swi, &ifp->if_linktask); 828 #endif 829 830 IEEE80211_LOCK(ic); 831 KASSERT(vap->iv_state == IEEE80211_S_INIT , ("vap still running")); 832 TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next); 833 ieee80211_syncflag_locked(ic, IEEE80211_F_WME); 834 #ifdef IEEE80211_SUPPORT_SUPERG 835 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); 836 #endif 837 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); 838 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); 839 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT); 840 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40); 841 842 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_VHT); 843 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT40); 844 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT80); 845 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT80P80); 846 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT160); 847 848 /* NB: this handles the bpfdetach done below */ 849 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_BPF); 850 if (vap->iv_ifflags & IFF_PROMISC) 851 ieee80211_promisc(vap, false); 852 if (vap->iv_ifflags & IFF_ALLMULTI) 853 ieee80211_allmulti(vap, false); 854 IEEE80211_UNLOCK(ic); 855 856 ifmedia_removeall(&vap->iv_media); 857 858 ieee80211_radiotap_vdetach(vap); 859 ieee80211_regdomain_vdetach(vap); 860 ieee80211_scan_vdetach(vap); 861 #ifdef IEEE80211_SUPPORT_SUPERG 862 ieee80211_superg_vdetach(vap); 863 #endif 864 ieee80211_vht_vdetach(vap); 865 ieee80211_ht_vdetach(vap); 866 /* NB: must be before ieee80211_node_vdetach */ 867 ieee80211_proto_vdetach(vap); 868 ieee80211_crypto_vdetach(vap); 869 ieee80211_power_vdetach(vap); 870 ieee80211_node_vdetach(vap); 871 ieee80211_sysctl_vdetach(vap); 872 873 if_free(ifp); 874 875 CURVNET_RESTORE(); 876 } 877 878 /* 879 * Count number of vaps in promisc, and issue promisc on 880 * parent respectively. 881 */ 882 void 883 ieee80211_promisc(struct ieee80211vap *vap, bool on) 884 { 885 struct ieee80211com *ic = vap->iv_ic; 886 887 IEEE80211_LOCK_ASSERT(ic); 888 889 if (on) { 890 if (++ic->ic_promisc == 1) 891 ieee80211_runtask(ic, &ic->ic_promisc_task); 892 } else { 893 KASSERT(ic->ic_promisc > 0, ("%s: ic %p not promisc", 894 __func__, ic)); 895 if (--ic->ic_promisc == 0) 896 ieee80211_runtask(ic, &ic->ic_promisc_task); 897 } 898 } 899 900 /* 901 * Count number of vaps in allmulti, and issue allmulti on 902 * parent respectively. 903 */ 904 void 905 ieee80211_allmulti(struct ieee80211vap *vap, bool on) 906 { 907 struct ieee80211com *ic = vap->iv_ic; 908 909 IEEE80211_LOCK_ASSERT(ic); 910 911 if (on) { 912 if (++ic->ic_allmulti == 1) 913 ieee80211_runtask(ic, &ic->ic_mcast_task); 914 } else { 915 KASSERT(ic->ic_allmulti > 0, ("%s: ic %p not allmulti", 916 __func__, ic)); 917 if (--ic->ic_allmulti == 0) 918 ieee80211_runtask(ic, &ic->ic_mcast_task); 919 } 920 } 921 922 /* 923 * Synchronize flag bit state in the com structure 924 * according to the state of all vap's. This is used, 925 * for example, to handle state changes via ioctls. 926 */ 927 static void 928 ieee80211_syncflag_locked(struct ieee80211com *ic, int flag) 929 { 930 struct ieee80211vap *vap; 931 int bit; 932 933 IEEE80211_LOCK_ASSERT(ic); 934 935 bit = 0; 936 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 937 if (vap->iv_flags & flag) { 938 bit = 1; 939 break; 940 } 941 if (bit) 942 ic->ic_flags |= flag; 943 else 944 ic->ic_flags &= ~flag; 945 } 946 947 void 948 ieee80211_syncflag(struct ieee80211vap *vap, int flag) 949 { 950 struct ieee80211com *ic = vap->iv_ic; 951 952 IEEE80211_LOCK(ic); 953 if (flag < 0) { 954 flag = -flag; 955 vap->iv_flags &= ~flag; 956 } else 957 vap->iv_flags |= flag; 958 ieee80211_syncflag_locked(ic, flag); 959 IEEE80211_UNLOCK(ic); 960 } 961 962 /* 963 * Synchronize flags_ht bit state in the com structure 964 * according to the state of all vap's. This is used, 965 * for example, to handle state changes via ioctls. 966 */ 967 static void 968 ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag) 969 { 970 struct ieee80211vap *vap; 971 int bit; 972 973 IEEE80211_LOCK_ASSERT(ic); 974 975 bit = 0; 976 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 977 if (vap->iv_flags_ht & flag) { 978 bit = 1; 979 break; 980 } 981 if (bit) 982 ic->ic_flags_ht |= flag; 983 else 984 ic->ic_flags_ht &= ~flag; 985 } 986 987 void 988 ieee80211_syncflag_ht(struct ieee80211vap *vap, int flag) 989 { 990 struct ieee80211com *ic = vap->iv_ic; 991 992 IEEE80211_LOCK(ic); 993 if (flag < 0) { 994 flag = -flag; 995 vap->iv_flags_ht &= ~flag; 996 } else 997 vap->iv_flags_ht |= flag; 998 ieee80211_syncflag_ht_locked(ic, flag); 999 IEEE80211_UNLOCK(ic); 1000 } 1001 1002 /* 1003 * Synchronize flags_vht bit state in the com structure 1004 * according to the state of all vap's. This is used, 1005 * for example, to handle state changes via ioctls. 1006 */ 1007 static void 1008 ieee80211_syncflag_vht_locked(struct ieee80211com *ic, int flag) 1009 { 1010 struct ieee80211vap *vap; 1011 int bit; 1012 1013 IEEE80211_LOCK_ASSERT(ic); 1014 1015 bit = 0; 1016 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1017 if (vap->iv_flags_vht & flag) { 1018 bit = 1; 1019 break; 1020 } 1021 if (bit) 1022 ic->ic_flags_vht |= flag; 1023 else 1024 ic->ic_flags_vht &= ~flag; 1025 } 1026 1027 void 1028 ieee80211_syncflag_vht(struct ieee80211vap *vap, int flag) 1029 { 1030 struct ieee80211com *ic = vap->iv_ic; 1031 1032 IEEE80211_LOCK(ic); 1033 if (flag < 0) { 1034 flag = -flag; 1035 vap->iv_flags_vht &= ~flag; 1036 } else 1037 vap->iv_flags_vht |= flag; 1038 ieee80211_syncflag_vht_locked(ic, flag); 1039 IEEE80211_UNLOCK(ic); 1040 } 1041 1042 /* 1043 * Synchronize flags_ext bit state in the com structure 1044 * according to the state of all vap's. This is used, 1045 * for example, to handle state changes via ioctls. 1046 */ 1047 static void 1048 ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag) 1049 { 1050 struct ieee80211vap *vap; 1051 int bit; 1052 1053 IEEE80211_LOCK_ASSERT(ic); 1054 1055 bit = 0; 1056 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1057 if (vap->iv_flags_ext & flag) { 1058 bit = 1; 1059 break; 1060 } 1061 if (bit) 1062 ic->ic_flags_ext |= flag; 1063 else 1064 ic->ic_flags_ext &= ~flag; 1065 } 1066 1067 void 1068 ieee80211_syncflag_ext(struct ieee80211vap *vap, int flag) 1069 { 1070 struct ieee80211com *ic = vap->iv_ic; 1071 1072 IEEE80211_LOCK(ic); 1073 if (flag < 0) { 1074 flag = -flag; 1075 vap->iv_flags_ext &= ~flag; 1076 } else 1077 vap->iv_flags_ext |= flag; 1078 ieee80211_syncflag_ext_locked(ic, flag); 1079 IEEE80211_UNLOCK(ic); 1080 } 1081 1082 static __inline int 1083 mapgsm(u_int freq, u_int flags) 1084 { 1085 freq *= 10; 1086 if (flags & IEEE80211_CHAN_QUARTER) 1087 freq += 5; 1088 else if (flags & IEEE80211_CHAN_HALF) 1089 freq += 10; 1090 else 1091 freq += 20; 1092 /* NB: there is no 907/20 wide but leave room */ 1093 return (freq - 906*10) / 5; 1094 } 1095 1096 static __inline int 1097 mappsb(u_int freq, u_int flags) 1098 { 1099 return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5; 1100 } 1101 1102 /* 1103 * Convert MHz frequency to IEEE channel number. 1104 */ 1105 int 1106 ieee80211_mhz2ieee(u_int freq, u_int flags) 1107 { 1108 #define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990) 1109 if (flags & IEEE80211_CHAN_GSM) 1110 return mapgsm(freq, flags); 1111 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 1112 if (freq == 2484) 1113 return 14; 1114 if (freq < 2484) 1115 return ((int) freq - 2407) / 5; 1116 else 1117 return 15 + ((freq - 2512) / 20); 1118 } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */ 1119 if (freq <= 5000) { 1120 /* XXX check regdomain? */ 1121 if (IS_FREQ_IN_PSB(freq)) 1122 return mappsb(freq, flags); 1123 return (freq - 4000) / 5; 1124 } else 1125 return (freq - 5000) / 5; 1126 } else { /* either, guess */ 1127 if (freq == 2484) 1128 return 14; 1129 if (freq < 2484) { 1130 if (907 <= freq && freq <= 922) 1131 return mapgsm(freq, flags); 1132 return ((int) freq - 2407) / 5; 1133 } 1134 if (freq < 5000) { 1135 if (IS_FREQ_IN_PSB(freq)) 1136 return mappsb(freq, flags); 1137 else if (freq > 4900) 1138 return (freq - 4000) / 5; 1139 else 1140 return 15 + ((freq - 2512) / 20); 1141 } 1142 return (freq - 5000) / 5; 1143 } 1144 #undef IS_FREQ_IN_PSB 1145 } 1146 1147 /* 1148 * Convert channel to IEEE channel number. 1149 */ 1150 int 1151 ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c) 1152 { 1153 if (c == NULL) { 1154 ic_printf(ic, "invalid channel (NULL)\n"); 1155 return 0; /* XXX */ 1156 } 1157 return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee); 1158 } 1159 1160 /* 1161 * Convert IEEE channel number to MHz frequency. 1162 */ 1163 u_int 1164 ieee80211_ieee2mhz(u_int chan, u_int flags) 1165 { 1166 if (flags & IEEE80211_CHAN_GSM) 1167 return 907 + 5 * (chan / 10); 1168 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 1169 if (chan == 14) 1170 return 2484; 1171 if (chan < 14) 1172 return 2407 + chan*5; 1173 else 1174 return 2512 + ((chan-15)*20); 1175 } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */ 1176 if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) { 1177 chan -= 37; 1178 return 4940 + chan*5 + (chan % 5 ? 2 : 0); 1179 } 1180 return 5000 + (chan*5); 1181 } else { /* either, guess */ 1182 /* XXX can't distinguish PSB+GSM channels */ 1183 if (chan == 14) 1184 return 2484; 1185 if (chan < 14) /* 0-13 */ 1186 return 2407 + chan*5; 1187 if (chan < 27) /* 15-26 */ 1188 return 2512 + ((chan-15)*20); 1189 return 5000 + (chan*5); 1190 } 1191 } 1192 1193 static __inline void 1194 set_extchan(struct ieee80211_channel *c) 1195 { 1196 1197 /* 1198 * IEEE Std 802.11-2012, page 1738, subclause 20.3.15.4: 1199 * "the secondary channel number shall be 'N + [1,-1] * 4' 1200 */ 1201 if (c->ic_flags & IEEE80211_CHAN_HT40U) 1202 c->ic_extieee = c->ic_ieee + 4; 1203 else if (c->ic_flags & IEEE80211_CHAN_HT40D) 1204 c->ic_extieee = c->ic_ieee - 4; 1205 else 1206 c->ic_extieee = 0; 1207 } 1208 1209 /* 1210 * Populate the freq1/freq2 fields as appropriate for VHT channels. 1211 * 1212 * This for now uses a hard-coded list of 80MHz wide channels. 1213 * 1214 * For HT20/HT40, freq1 just is the centre frequency of the 40MHz 1215 * wide channel we've already decided upon. 1216 * 1217 * For VHT80 and VHT160, there are only a small number of fixed 1218 * 80/160MHz wide channels, so we just use those. 1219 * 1220 * This is all likely very very wrong - both the regulatory code 1221 * and this code needs to ensure that all four channels are 1222 * available and valid before the VHT80 (and eight for VHT160) channel 1223 * is created. 1224 */ 1225 1226 struct vht_chan_range { 1227 uint16_t freq_start; 1228 uint16_t freq_end; 1229 }; 1230 1231 struct vht_chan_range vht80_chan_ranges[] = { 1232 { 5170, 5250 }, 1233 { 5250, 5330 }, 1234 { 5490, 5570 }, 1235 { 5570, 5650 }, 1236 { 5650, 5730 }, 1237 { 5735, 5815 }, 1238 { 0, 0, } 1239 }; 1240 1241 static int 1242 set_vht_extchan(struct ieee80211_channel *c) 1243 { 1244 int i; 1245 1246 if (! IEEE80211_IS_CHAN_VHT(c)) { 1247 return (0); 1248 } 1249 1250 if (IEEE80211_IS_CHAN_VHT20(c)) { 1251 c->ic_vht_ch_freq1 = c->ic_ieee; 1252 return (1); 1253 } 1254 1255 if (IEEE80211_IS_CHAN_VHT40(c)) { 1256 if (IEEE80211_IS_CHAN_HT40U(c)) 1257 c->ic_vht_ch_freq1 = c->ic_ieee + 2; 1258 else if (IEEE80211_IS_CHAN_HT40D(c)) 1259 c->ic_vht_ch_freq1 = c->ic_ieee - 2; 1260 else 1261 return (0); 1262 return (1); 1263 } 1264 1265 if (IEEE80211_IS_CHAN_VHT80(c)) { 1266 for (i = 0; vht80_chan_ranges[i].freq_start != 0; i++) { 1267 if (c->ic_freq >= vht80_chan_ranges[i].freq_start && 1268 c->ic_freq < vht80_chan_ranges[i].freq_end) { 1269 int midpoint; 1270 1271 midpoint = vht80_chan_ranges[i].freq_start + 40; 1272 c->ic_vht_ch_freq1 = 1273 ieee80211_mhz2ieee(midpoint, c->ic_flags); 1274 c->ic_vht_ch_freq2 = 0; 1275 #if 0 1276 printf("%s: %d, freq=%d, midpoint=%d, freq1=%d, freq2=%d\n", 1277 __func__, c->ic_ieee, c->ic_freq, midpoint, 1278 c->ic_vht_ch_freq1, c->ic_vht_ch_freq2); 1279 #endif 1280 return (1); 1281 } 1282 } 1283 return (0); 1284 } 1285 1286 printf("%s: unknown VHT channel type (ieee=%d, flags=0x%08x)\n", 1287 __func__, 1288 c->ic_ieee, 1289 c->ic_flags); 1290 1291 return (0); 1292 } 1293 1294 /* 1295 * Return whether the current channel could possibly be a part of 1296 * a VHT80 channel. 1297 * 1298 * This doesn't check that the whole range is in the allowed list 1299 * according to regulatory. 1300 */ 1301 static int 1302 is_vht80_valid_freq(uint16_t freq) 1303 { 1304 int i; 1305 for (i = 0; vht80_chan_ranges[i].freq_start != 0; i++) { 1306 if (freq >= vht80_chan_ranges[i].freq_start && 1307 freq < vht80_chan_ranges[i].freq_end) 1308 return (1); 1309 } 1310 return (0); 1311 } 1312 1313 static int 1314 addchan(struct ieee80211_channel chans[], int maxchans, int *nchans, 1315 uint8_t ieee, uint16_t freq, int8_t maxregpower, uint32_t flags) 1316 { 1317 struct ieee80211_channel *c; 1318 1319 if (*nchans >= maxchans) 1320 return (ENOBUFS); 1321 1322 #if 0 1323 printf("%s: %d: ieee=%d, freq=%d, flags=0x%08x\n", 1324 __func__, 1325 *nchans, 1326 ieee, 1327 freq, 1328 flags); 1329 #endif 1330 1331 c = &chans[(*nchans)++]; 1332 c->ic_ieee = ieee; 1333 c->ic_freq = freq != 0 ? freq : ieee80211_ieee2mhz(ieee, flags); 1334 c->ic_maxregpower = maxregpower; 1335 c->ic_maxpower = 2 * maxregpower; 1336 c->ic_flags = flags; 1337 c->ic_vht_ch_freq1 = 0; 1338 c->ic_vht_ch_freq2 = 0; 1339 set_extchan(c); 1340 set_vht_extchan(c); 1341 1342 return (0); 1343 } 1344 1345 static int 1346 copychan_prev(struct ieee80211_channel chans[], int maxchans, int *nchans, 1347 uint32_t flags) 1348 { 1349 struct ieee80211_channel *c; 1350 1351 KASSERT(*nchans > 0, ("channel list is empty\n")); 1352 1353 if (*nchans >= maxchans) 1354 return (ENOBUFS); 1355 1356 #if 0 1357 printf("%s: %d: flags=0x%08x\n", 1358 __func__, 1359 *nchans, 1360 flags); 1361 #endif 1362 1363 c = &chans[(*nchans)++]; 1364 c[0] = c[-1]; 1365 c->ic_flags = flags; 1366 c->ic_vht_ch_freq1 = 0; 1367 c->ic_vht_ch_freq2 = 0; 1368 set_extchan(c); 1369 set_vht_extchan(c); 1370 1371 return (0); 1372 } 1373 1374 /* 1375 * XXX VHT-2GHz 1376 */ 1377 static void 1378 getflags_2ghz(const uint8_t bands[], uint32_t flags[], int ht40) 1379 { 1380 int nmodes; 1381 1382 nmodes = 0; 1383 if (isset(bands, IEEE80211_MODE_11B)) 1384 flags[nmodes++] = IEEE80211_CHAN_B; 1385 if (isset(bands, IEEE80211_MODE_11G)) 1386 flags[nmodes++] = IEEE80211_CHAN_G; 1387 if (isset(bands, IEEE80211_MODE_11NG)) 1388 flags[nmodes++] = IEEE80211_CHAN_G | IEEE80211_CHAN_HT20; 1389 if (ht40) { 1390 flags[nmodes++] = IEEE80211_CHAN_G | IEEE80211_CHAN_HT40U; 1391 flags[nmodes++] = IEEE80211_CHAN_G | IEEE80211_CHAN_HT40D; 1392 } 1393 flags[nmodes] = 0; 1394 } 1395 1396 static void 1397 getflags_5ghz(const uint8_t bands[], uint32_t flags[], int ht40, int vht80) 1398 { 1399 int nmodes; 1400 1401 /* 1402 * the addchan_list function seems to expect the flags array to 1403 * be in channel width order, so the VHT bits are interspersed 1404 * as appropriate to maintain said order. 1405 * 1406 * It also assumes HT40U is before HT40D. 1407 */ 1408 nmodes = 0; 1409 1410 /* 20MHz */ 1411 if (isset(bands, IEEE80211_MODE_11A)) 1412 flags[nmodes++] = IEEE80211_CHAN_A; 1413 if (isset(bands, IEEE80211_MODE_11NA)) 1414 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT20; 1415 if (isset(bands, IEEE80211_MODE_VHT_5GHZ)) { 1416 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT20 | 1417 IEEE80211_CHAN_VHT20; 1418 } 1419 1420 /* 40MHz */ 1421 if (ht40) { 1422 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT40U; 1423 } 1424 if (ht40 && isset(bands, IEEE80211_MODE_VHT_5GHZ)) { 1425 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT40U 1426 | IEEE80211_CHAN_VHT40U; 1427 } 1428 if (ht40) { 1429 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT40D; 1430 } 1431 if (ht40 && isset(bands, IEEE80211_MODE_VHT_5GHZ)) { 1432 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT40D 1433 | IEEE80211_CHAN_VHT40D; 1434 } 1435 1436 /* 80MHz */ 1437 if (vht80 && isset(bands, IEEE80211_MODE_VHT_5GHZ)) { 1438 flags[nmodes++] = IEEE80211_CHAN_A | 1439 IEEE80211_CHAN_HT40U | IEEE80211_CHAN_VHT80; 1440 flags[nmodes++] = IEEE80211_CHAN_A | 1441 IEEE80211_CHAN_HT40D | IEEE80211_CHAN_VHT80; 1442 } 1443 1444 /* XXX VHT80+80 */ 1445 /* XXX VHT160 */ 1446 flags[nmodes] = 0; 1447 } 1448 1449 static void 1450 getflags(const uint8_t bands[], uint32_t flags[], int ht40, int vht80) 1451 { 1452 1453 flags[0] = 0; 1454 if (isset(bands, IEEE80211_MODE_11A) || 1455 isset(bands, IEEE80211_MODE_11NA) || 1456 isset(bands, IEEE80211_MODE_VHT_5GHZ)) { 1457 if (isset(bands, IEEE80211_MODE_11B) || 1458 isset(bands, IEEE80211_MODE_11G) || 1459 isset(bands, IEEE80211_MODE_11NG) || 1460 isset(bands, IEEE80211_MODE_VHT_2GHZ)) 1461 return; 1462 1463 getflags_5ghz(bands, flags, ht40, vht80); 1464 } else 1465 getflags_2ghz(bands, flags, ht40); 1466 } 1467 1468 /* 1469 * Add one 20 MHz channel into specified channel list. 1470 */ 1471 /* XXX VHT */ 1472 int 1473 ieee80211_add_channel(struct ieee80211_channel chans[], int maxchans, 1474 int *nchans, uint8_t ieee, uint16_t freq, int8_t maxregpower, 1475 uint32_t chan_flags, const uint8_t bands[]) 1476 { 1477 uint32_t flags[IEEE80211_MODE_MAX]; 1478 int i, error; 1479 1480 getflags(bands, flags, 0, 0); 1481 KASSERT(flags[0] != 0, ("%s: no correct mode provided\n", __func__)); 1482 1483 error = addchan(chans, maxchans, nchans, ieee, freq, maxregpower, 1484 flags[0] | chan_flags); 1485 for (i = 1; flags[i] != 0 && error == 0; i++) { 1486 error = copychan_prev(chans, maxchans, nchans, 1487 flags[i] | chan_flags); 1488 } 1489 1490 return (error); 1491 } 1492 1493 static struct ieee80211_channel * 1494 findchannel(struct ieee80211_channel chans[], int nchans, uint16_t freq, 1495 uint32_t flags) 1496 { 1497 struct ieee80211_channel *c; 1498 int i; 1499 1500 flags &= IEEE80211_CHAN_ALLTURBO; 1501 /* brute force search */ 1502 for (i = 0; i < nchans; i++) { 1503 c = &chans[i]; 1504 if (c->ic_freq == freq && 1505 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 1506 return c; 1507 } 1508 return NULL; 1509 } 1510 1511 /* 1512 * Add 40 MHz channel pair into specified channel list. 1513 */ 1514 /* XXX VHT */ 1515 int 1516 ieee80211_add_channel_ht40(struct ieee80211_channel chans[], int maxchans, 1517 int *nchans, uint8_t ieee, int8_t maxregpower, uint32_t flags) 1518 { 1519 struct ieee80211_channel *cent, *extc; 1520 uint16_t freq; 1521 int error; 1522 1523 freq = ieee80211_ieee2mhz(ieee, flags); 1524 1525 /* 1526 * Each entry defines an HT40 channel pair; find the 1527 * center channel, then the extension channel above. 1528 */ 1529 flags |= IEEE80211_CHAN_HT20; 1530 cent = findchannel(chans, *nchans, freq, flags); 1531 if (cent == NULL) 1532 return (EINVAL); 1533 1534 extc = findchannel(chans, *nchans, freq + 20, flags); 1535 if (extc == NULL) 1536 return (ENOENT); 1537 1538 flags &= ~IEEE80211_CHAN_HT; 1539 error = addchan(chans, maxchans, nchans, cent->ic_ieee, cent->ic_freq, 1540 maxregpower, flags | IEEE80211_CHAN_HT40U); 1541 if (error != 0) 1542 return (error); 1543 1544 error = addchan(chans, maxchans, nchans, extc->ic_ieee, extc->ic_freq, 1545 maxregpower, flags | IEEE80211_CHAN_HT40D); 1546 1547 return (error); 1548 } 1549 1550 /* 1551 * Fetch the center frequency for the primary channel. 1552 */ 1553 uint32_t 1554 ieee80211_get_channel_center_freq(const struct ieee80211_channel *c) 1555 { 1556 1557 return (c->ic_freq); 1558 } 1559 1560 /* 1561 * Fetch the center frequency for the primary BAND channel. 1562 * 1563 * For 5, 10, 20MHz channels it'll be the normally configured channel 1564 * frequency. 1565 * 1566 * For 40MHz, 80MHz, 160Mhz channels it'll the the centre of the 1567 * wide channel, not the centre of the primary channel (that's ic_freq). 1568 * 1569 * For 80+80MHz channels this will be the centre of the primary 1570 * 80MHz channel; the secondary 80MHz channel will be center_freq2(). 1571 */ 1572 uint32_t 1573 ieee80211_get_channel_center_freq1(const struct ieee80211_channel *c) 1574 { 1575 1576 /* 1577 * VHT - use the pre-calculated centre frequency 1578 * of the given channel. 1579 */ 1580 if (IEEE80211_IS_CHAN_VHT(c)) 1581 return (ieee80211_ieee2mhz(c->ic_vht_ch_freq1, c->ic_flags)); 1582 1583 if (IEEE80211_IS_CHAN_HT40U(c)) { 1584 return (c->ic_freq + 10); 1585 } 1586 if (IEEE80211_IS_CHAN_HT40D(c)) { 1587 return (c->ic_freq - 10); 1588 } 1589 1590 return (c->ic_freq); 1591 } 1592 1593 /* 1594 * For now, no 80+80 support; it will likely always return 0. 1595 */ 1596 uint32_t 1597 ieee80211_get_channel_center_freq2(const struct ieee80211_channel *c) 1598 { 1599 1600 if (IEEE80211_IS_CHAN_VHT(c) && (c->ic_vht_ch_freq2 != 0)) 1601 return (ieee80211_ieee2mhz(c->ic_vht_ch_freq2, c->ic_flags)); 1602 1603 return (0); 1604 } 1605 1606 /* 1607 * Adds channels into specified channel list (ieee[] array must be sorted). 1608 * Channels are already sorted. 1609 */ 1610 static int 1611 add_chanlist(struct ieee80211_channel chans[], int maxchans, int *nchans, 1612 const uint8_t ieee[], int nieee, uint32_t flags[]) 1613 { 1614 uint16_t freq; 1615 int i, j, error; 1616 int is_vht; 1617 1618 for (i = 0; i < nieee; i++) { 1619 freq = ieee80211_ieee2mhz(ieee[i], flags[0]); 1620 for (j = 0; flags[j] != 0; j++) { 1621 /* 1622 * Notes: 1623 * + HT40 and VHT40 channels occur together, so 1624 * we need to be careful that we actually allow that. 1625 * + VHT80, VHT160 will coexist with HT40/VHT40, so 1626 * make sure it's not skipped because of the overlap 1627 * check used for (V)HT40. 1628 */ 1629 is_vht = !! (flags[j] & IEEE80211_CHAN_VHT); 1630 1631 /* 1632 * Test for VHT80. 1633 * XXX This is all very broken right now. 1634 * What we /should/ do is: 1635 * 1636 * + check that the frequency is in the list of 1637 * allowed VHT80 ranges; and 1638 * + the other 3 channels in the list are actually 1639 * also available. 1640 */ 1641 if (is_vht && flags[j] & IEEE80211_CHAN_VHT80) 1642 if (! is_vht80_valid_freq(freq)) 1643 continue; 1644 1645 /* 1646 * Test for (V)HT40. 1647 * 1648 * This is also a fall through from VHT80; as we only 1649 * allow a VHT80 channel if the VHT40 combination is 1650 * also valid. If the VHT40 form is not valid then 1651 * we certainly can't do VHT80.. 1652 */ 1653 if (flags[j] & IEEE80211_CHAN_HT40D) 1654 /* 1655 * Can't have a "lower" channel if we are the 1656 * first channel. 1657 * 1658 * Can't have a "lower" channel if it's below/ 1659 * within 20MHz of the first channel. 1660 * 1661 * Can't have a "lower" channel if the channel 1662 * below it is not 20MHz away. 1663 */ 1664 if (i == 0 || ieee[i] < ieee[0] + 4 || 1665 freq - 20 != 1666 ieee80211_ieee2mhz(ieee[i] - 4, flags[j])) 1667 continue; 1668 if (flags[j] & IEEE80211_CHAN_HT40U) 1669 /* 1670 * Can't have an "upper" channel if we are 1671 * the last channel. 1672 * 1673 * Can't have an "upper" channel be above the 1674 * last channel in the list. 1675 * 1676 * Can't have an "upper" channel if the next 1677 * channel according to the math isn't 20MHz 1678 * away. (Likely for channel 13/14.) 1679 */ 1680 if (i == nieee - 1 || 1681 ieee[i] + 4 > ieee[nieee - 1] || 1682 freq + 20 != 1683 ieee80211_ieee2mhz(ieee[i] + 4, flags[j])) 1684 continue; 1685 1686 if (j == 0) { 1687 error = addchan(chans, maxchans, nchans, 1688 ieee[i], freq, 0, flags[j]); 1689 } else { 1690 error = copychan_prev(chans, maxchans, nchans, 1691 flags[j]); 1692 } 1693 if (error != 0) 1694 return (error); 1695 } 1696 } 1697 1698 return (0); 1699 } 1700 1701 int 1702 ieee80211_add_channel_list_2ghz(struct ieee80211_channel chans[], int maxchans, 1703 int *nchans, const uint8_t ieee[], int nieee, const uint8_t bands[], 1704 int ht40) 1705 { 1706 uint32_t flags[IEEE80211_MODE_MAX]; 1707 1708 /* XXX no VHT for now */ 1709 getflags_2ghz(bands, flags, ht40); 1710 KASSERT(flags[0] != 0, ("%s: no correct mode provided\n", __func__)); 1711 1712 return (add_chanlist(chans, maxchans, nchans, ieee, nieee, flags)); 1713 } 1714 1715 int 1716 ieee80211_add_channel_list_5ghz(struct ieee80211_channel chans[], int maxchans, 1717 int *nchans, const uint8_t ieee[], int nieee, const uint8_t bands[], 1718 int ht40) 1719 { 1720 uint32_t flags[IEEE80211_MODE_MAX]; 1721 int vht80 = 0; 1722 1723 /* 1724 * For now, assume VHT == VHT80 support as a minimum. 1725 */ 1726 if (isset(bands, IEEE80211_MODE_VHT_5GHZ)) 1727 vht80 = 1; 1728 1729 getflags_5ghz(bands, flags, ht40, vht80); 1730 KASSERT(flags[0] != 0, ("%s: no correct mode provided\n", __func__)); 1731 1732 return (add_chanlist(chans, maxchans, nchans, ieee, nieee, flags)); 1733 } 1734 1735 /* 1736 * Locate a channel given a frequency+flags. We cache 1737 * the previous lookup to optimize switching between two 1738 * channels--as happens with dynamic turbo. 1739 */ 1740 struct ieee80211_channel * 1741 ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags) 1742 { 1743 struct ieee80211_channel *c; 1744 1745 flags &= IEEE80211_CHAN_ALLTURBO; 1746 c = ic->ic_prevchan; 1747 if (c != NULL && c->ic_freq == freq && 1748 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 1749 return c; 1750 /* brute force search */ 1751 return (findchannel(ic->ic_channels, ic->ic_nchans, freq, flags)); 1752 } 1753 1754 /* 1755 * Locate a channel given a channel number+flags. We cache 1756 * the previous lookup to optimize switching between two 1757 * channels--as happens with dynamic turbo. 1758 */ 1759 struct ieee80211_channel * 1760 ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags) 1761 { 1762 struct ieee80211_channel *c; 1763 int i; 1764 1765 flags &= IEEE80211_CHAN_ALLTURBO; 1766 c = ic->ic_prevchan; 1767 if (c != NULL && c->ic_ieee == ieee && 1768 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 1769 return c; 1770 /* brute force search */ 1771 for (i = 0; i < ic->ic_nchans; i++) { 1772 c = &ic->ic_channels[i]; 1773 if (c->ic_ieee == ieee && 1774 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 1775 return c; 1776 } 1777 return NULL; 1778 } 1779 1780 /* 1781 * Lookup a channel suitable for the given rx status. 1782 * 1783 * This is used to find a channel for a frame (eg beacon, probe 1784 * response) based purely on the received PHY information. 1785 * 1786 * For now it tries to do it based on R_FREQ / R_IEEE. 1787 * This is enough for 11bg and 11a (and thus 11ng/11na) 1788 * but it will not be enough for GSM, PSB channels and the 1789 * like. It also doesn't know about legacy-turbog and 1790 * legacy-turbo modes, which some offload NICs actually 1791 * support in weird ways. 1792 * 1793 * Takes the ic and rxstatus; returns the channel or NULL 1794 * if not found. 1795 * 1796 * XXX TODO: Add support for that when the need arises. 1797 */ 1798 struct ieee80211_channel * 1799 ieee80211_lookup_channel_rxstatus(struct ieee80211vap *vap, 1800 const struct ieee80211_rx_stats *rxs) 1801 { 1802 struct ieee80211com *ic = vap->iv_ic; 1803 uint32_t flags; 1804 struct ieee80211_channel *c; 1805 1806 if (rxs == NULL) 1807 return (NULL); 1808 1809 /* 1810 * Strictly speaking we only use freq for now, 1811 * however later on we may wish to just store 1812 * the ieee for verification. 1813 */ 1814 if ((rxs->r_flags & IEEE80211_R_FREQ) == 0) 1815 return (NULL); 1816 if ((rxs->r_flags & IEEE80211_R_IEEE) == 0) 1817 return (NULL); 1818 1819 /* 1820 * If the rx status contains a valid ieee/freq, then 1821 * ensure we populate the correct channel information 1822 * in rxchan before passing it up to the scan infrastructure. 1823 * Offload NICs will pass up beacons from all channels 1824 * during background scans. 1825 */ 1826 1827 /* Determine a band */ 1828 /* XXX should be done by the driver? */ 1829 if (rxs->c_freq < 3000) { 1830 flags = IEEE80211_CHAN_G; 1831 } else { 1832 flags = IEEE80211_CHAN_A; 1833 } 1834 1835 /* Channel lookup */ 1836 c = ieee80211_find_channel(ic, rxs->c_freq, flags); 1837 1838 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INPUT, 1839 "%s: freq=%d, ieee=%d, flags=0x%08x; c=%p\n", 1840 __func__, 1841 (int) rxs->c_freq, 1842 (int) rxs->c_ieee, 1843 flags, 1844 c); 1845 1846 return (c); 1847 } 1848 1849 static void 1850 addmedia(struct ifmedia *media, int caps, int addsta, int mode, int mword) 1851 { 1852 #define ADD(_ic, _s, _o) \ 1853 ifmedia_add(media, \ 1854 IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL) 1855 static const u_int mopts[IEEE80211_MODE_MAX] = { 1856 [IEEE80211_MODE_AUTO] = IFM_AUTO, 1857 [IEEE80211_MODE_11A] = IFM_IEEE80211_11A, 1858 [IEEE80211_MODE_11B] = IFM_IEEE80211_11B, 1859 [IEEE80211_MODE_11G] = IFM_IEEE80211_11G, 1860 [IEEE80211_MODE_FH] = IFM_IEEE80211_FH, 1861 [IEEE80211_MODE_TURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO, 1862 [IEEE80211_MODE_TURBO_G] = IFM_IEEE80211_11G|IFM_IEEE80211_TURBO, 1863 [IEEE80211_MODE_STURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO, 1864 [IEEE80211_MODE_HALF] = IFM_IEEE80211_11A, /* XXX */ 1865 [IEEE80211_MODE_QUARTER] = IFM_IEEE80211_11A, /* XXX */ 1866 [IEEE80211_MODE_11NA] = IFM_IEEE80211_11NA, 1867 [IEEE80211_MODE_11NG] = IFM_IEEE80211_11NG, 1868 [IEEE80211_MODE_VHT_2GHZ] = IFM_IEEE80211_VHT2G, 1869 [IEEE80211_MODE_VHT_5GHZ] = IFM_IEEE80211_VHT5G, 1870 }; 1871 u_int mopt; 1872 1873 mopt = mopts[mode]; 1874 if (addsta) 1875 ADD(ic, mword, mopt); /* STA mode has no cap */ 1876 if (caps & IEEE80211_C_IBSS) 1877 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC); 1878 if (caps & IEEE80211_C_HOSTAP) 1879 ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP); 1880 if (caps & IEEE80211_C_AHDEMO) 1881 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0); 1882 if (caps & IEEE80211_C_MONITOR) 1883 ADD(media, mword, mopt | IFM_IEEE80211_MONITOR); 1884 if (caps & IEEE80211_C_WDS) 1885 ADD(media, mword, mopt | IFM_IEEE80211_WDS); 1886 if (caps & IEEE80211_C_MBSS) 1887 ADD(media, mword, mopt | IFM_IEEE80211_MBSS); 1888 #undef ADD 1889 } 1890 1891 /* 1892 * Setup the media data structures according to the channel and 1893 * rate tables. 1894 */ 1895 static int 1896 ieee80211_media_setup(struct ieee80211com *ic, 1897 struct ifmedia *media, int caps, int addsta, 1898 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) 1899 { 1900 int i, j, rate, maxrate, mword, r; 1901 enum ieee80211_phymode mode; 1902 const struct ieee80211_rateset *rs; 1903 struct ieee80211_rateset allrates; 1904 1905 /* 1906 * Fill in media characteristics. 1907 */ 1908 ifmedia_init(media, 0, media_change, media_stat); 1909 maxrate = 0; 1910 /* 1911 * Add media for legacy operating modes. 1912 */ 1913 memset(&allrates, 0, sizeof(allrates)); 1914 for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) { 1915 if (isclr(ic->ic_modecaps, mode)) 1916 continue; 1917 addmedia(media, caps, addsta, mode, IFM_AUTO); 1918 if (mode == IEEE80211_MODE_AUTO) 1919 continue; 1920 rs = &ic->ic_sup_rates[mode]; 1921 for (i = 0; i < rs->rs_nrates; i++) { 1922 rate = rs->rs_rates[i]; 1923 mword = ieee80211_rate2media(ic, rate, mode); 1924 if (mword == 0) 1925 continue; 1926 addmedia(media, caps, addsta, mode, mword); 1927 /* 1928 * Add legacy rate to the collection of all rates. 1929 */ 1930 r = rate & IEEE80211_RATE_VAL; 1931 for (j = 0; j < allrates.rs_nrates; j++) 1932 if (allrates.rs_rates[j] == r) 1933 break; 1934 if (j == allrates.rs_nrates) { 1935 /* unique, add to the set */ 1936 allrates.rs_rates[j] = r; 1937 allrates.rs_nrates++; 1938 } 1939 rate = (rate & IEEE80211_RATE_VAL) / 2; 1940 if (rate > maxrate) 1941 maxrate = rate; 1942 } 1943 } 1944 for (i = 0; i < allrates.rs_nrates; i++) { 1945 mword = ieee80211_rate2media(ic, allrates.rs_rates[i], 1946 IEEE80211_MODE_AUTO); 1947 if (mword == 0) 1948 continue; 1949 /* NB: remove media options from mword */ 1950 addmedia(media, caps, addsta, 1951 IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword)); 1952 } 1953 /* 1954 * Add HT/11n media. Note that we do not have enough 1955 * bits in the media subtype to express the MCS so we 1956 * use a "placeholder" media subtype and any fixed MCS 1957 * must be specified with a different mechanism. 1958 */ 1959 for (; mode <= IEEE80211_MODE_11NG; mode++) { 1960 if (isclr(ic->ic_modecaps, mode)) 1961 continue; 1962 addmedia(media, caps, addsta, mode, IFM_AUTO); 1963 addmedia(media, caps, addsta, mode, IFM_IEEE80211_MCS); 1964 } 1965 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) || 1966 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) { 1967 addmedia(media, caps, addsta, 1968 IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS); 1969 i = ic->ic_txstream * 8 - 1; 1970 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) && 1971 (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI40)) 1972 rate = ieee80211_htrates[i].ht40_rate_400ns; 1973 else if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40)) 1974 rate = ieee80211_htrates[i].ht40_rate_800ns; 1975 else if ((ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI20)) 1976 rate = ieee80211_htrates[i].ht20_rate_400ns; 1977 else 1978 rate = ieee80211_htrates[i].ht20_rate_800ns; 1979 if (rate > maxrate) 1980 maxrate = rate; 1981 } 1982 1983 /* 1984 * Add VHT media. 1985 */ 1986 for (; mode <= IEEE80211_MODE_VHT_5GHZ; mode++) { 1987 if (isclr(ic->ic_modecaps, mode)) 1988 continue; 1989 addmedia(media, caps, addsta, mode, IFM_AUTO); 1990 addmedia(media, caps, addsta, mode, IFM_IEEE80211_VHT); 1991 1992 /* XXX TODO: VHT maxrate */ 1993 } 1994 1995 return maxrate; 1996 } 1997 1998 /* XXX inline or eliminate? */ 1999 const struct ieee80211_rateset * 2000 ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c) 2001 { 2002 /* XXX does this work for 11ng basic rates? */ 2003 return &ic->ic_sup_rates[ieee80211_chan2mode(c)]; 2004 } 2005 2006 /* XXX inline or eliminate? */ 2007 const struct ieee80211_htrateset * 2008 ieee80211_get_suphtrates(struct ieee80211com *ic, 2009 const struct ieee80211_channel *c) 2010 { 2011 return &ic->ic_sup_htrates; 2012 } 2013 2014 void 2015 ieee80211_media_init(struct ieee80211com *ic, 2016 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) 2017 { 2018 2019 ieee80211_media_init_with_lock(ic, media_change, media_stat, NULL); 2020 } 2021 2022 void 2023 ieee80211_announce(struct ieee80211com *ic) 2024 { 2025 int i, rate, mword; 2026 enum ieee80211_phymode mode; 2027 const struct ieee80211_rateset *rs; 2028 2029 /* NB: skip AUTO since it has no rates */ 2030 for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) { 2031 if (isclr(ic->ic_modecaps, mode)) 2032 continue; 2033 aprint_debug("%s: %s rates: ", ifp->if_xname, 2034 ieee80211_phymode_name[mode]); 2035 ic_printf(ic, "%s rates: ", ieee80211_phymode_name[mode]); 2036 rs = &ic->ic_sup_rates[mode]; 2037 for (i = 0; i < rs->rs_nrates; i++) { 2038 mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode); 2039 if (mword == 0) 2040 continue; 2041 rate = ieee80211_media2rate(mword); 2042 aprint_debug("%s%d%sMbps", (i != 0 ? " " : ""), 2043 rate / 2, ((rate & 0x1) != 0 ? ".5" : "")); 2044 } 2045 aprint_debug("\n"); 2046 } 2047 ieee80211_ht_announce(ic); 2048 ieee80211_vht_announce(ic); 2049 } 2050 2051 void 2052 ieee80211_announce_channels(struct ieee80211com *ic) 2053 { 2054 const struct ieee80211_channel *c; 2055 char type; 2056 int i, cw; 2057 2058 printf("Chan Freq CW RegPwr MinPwr MaxPwr\n"); 2059 for (i = 0; i < ic->ic_nchans; i++) { 2060 c = &ic->ic_channels[i]; 2061 if (IEEE80211_IS_CHAN_ST(c)) 2062 type = 'S'; 2063 else if (IEEE80211_IS_CHAN_108A(c)) 2064 type = 'T'; 2065 else if (IEEE80211_IS_CHAN_108G(c)) 2066 type = 'G'; 2067 else if (IEEE80211_IS_CHAN_HT(c)) 2068 type = 'n'; 2069 else if (IEEE80211_IS_CHAN_A(c)) 2070 type = 'a'; 2071 else if (IEEE80211_IS_CHAN_ANYG(c)) 2072 type = 'g'; 2073 else if (IEEE80211_IS_CHAN_B(c)) 2074 type = 'b'; 2075 else 2076 type = 'f'; 2077 if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c)) 2078 cw = 40; 2079 else if (IEEE80211_IS_CHAN_HALF(c)) 2080 cw = 10; 2081 else if (IEEE80211_IS_CHAN_QUARTER(c)) 2082 cw = 5; 2083 else 2084 cw = 20; 2085 printf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n" 2086 , c->ic_ieee, c->ic_freq, type 2087 , cw 2088 , IEEE80211_IS_CHAN_HT40U(c) ? '+' : 2089 IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' ' 2090 , c->ic_maxregpower 2091 , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0 2092 , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0 2093 ); 2094 } 2095 } 2096 2097 static int 2098 media2mode(const struct ifmedia_entry *ime, uint32_t flags, uint16_t *mode) 2099 { 2100 switch (IFM_MODE(ime->ifm_media)) { 2101 case IFM_IEEE80211_11A: 2102 *mode = IEEE80211_MODE_11A; 2103 break; 2104 case IFM_IEEE80211_11B: 2105 *mode = IEEE80211_MODE_11B; 2106 break; 2107 case IFM_IEEE80211_11G: 2108 *mode = IEEE80211_MODE_11G; 2109 break; 2110 case IFM_IEEE80211_FH: 2111 *mode = IEEE80211_MODE_FH; 2112 break; 2113 case IFM_IEEE80211_11NA: 2114 *mode = IEEE80211_MODE_11NA; 2115 break; 2116 case IFM_IEEE80211_11NG: 2117 *mode = IEEE80211_MODE_11NG; 2118 break; 2119 case IFM_AUTO: 2120 *mode = IEEE80211_MODE_AUTO; 2121 break; 2122 default: 2123 return 0; 2124 } 2125 /* 2126 * Turbo mode is an ``option''. 2127 * XXX does not apply to AUTO 2128 */ 2129 if (ime->ifm_media & IFM_IEEE80211_TURBO) { 2130 if (*mode == IEEE80211_MODE_11A) { 2131 if (flags & IEEE80211_F_TURBOP) 2132 *mode = IEEE80211_MODE_TURBO_A; 2133 else 2134 *mode = IEEE80211_MODE_STURBO_A; 2135 } else if (*mode == IEEE80211_MODE_11G) 2136 *mode = IEEE80211_MODE_TURBO_G; 2137 else 2138 return 0; 2139 } 2140 /* XXX HT40 +/- */ 2141 return 1; 2142 } 2143 2144 /* 2145 * Handle a media change request on the vap interface. 2146 */ 2147 int 2148 ieee80211_media_change(struct ifnet *ifp) 2149 { 2150 struct ieee80211vap *vap = ifp->if_softc; 2151 struct ifmedia_entry *ime = vap->iv_media.ifm_cur; 2152 uint16_t newmode; 2153 2154 if (!media2mode(ime, vap->iv_flags, &newmode)) 2155 return EINVAL; 2156 if (vap->iv_des_mode != newmode) { 2157 vap->iv_des_mode = newmode; 2158 /* XXX kick state machine if up+running */ 2159 } 2160 return 0; 2161 } 2162 2163 /* 2164 * Common code to calculate the media status word 2165 * from the operating mode and channel state. 2166 */ 2167 static int 2168 media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan) 2169 { 2170 int status; 2171 2172 status = IFM_IEEE80211; 2173 switch (opmode) { 2174 case IEEE80211_M_STA: 2175 break; 2176 case IEEE80211_M_IBSS: 2177 status |= IFM_IEEE80211_ADHOC; 2178 break; 2179 case IEEE80211_M_HOSTAP: 2180 status |= IFM_IEEE80211_HOSTAP; 2181 break; 2182 case IEEE80211_M_MONITOR: 2183 status |= IFM_IEEE80211_MONITOR; 2184 break; 2185 case IEEE80211_M_AHDEMO: 2186 status |= IFM_IEEE80211_ADHOC | IFM_FLAG0; 2187 break; 2188 case IEEE80211_M_WDS: 2189 status |= IFM_IEEE80211_WDS; 2190 break; 2191 case IEEE80211_M_MBSS: 2192 status |= IFM_IEEE80211_MBSS; 2193 break; 2194 } 2195 if (IEEE80211_IS_CHAN_HTA(chan)) { 2196 status |= IFM_IEEE80211_11NA; 2197 } else if (IEEE80211_IS_CHAN_HTG(chan)) { 2198 status |= IFM_IEEE80211_11NG; 2199 } else if (IEEE80211_IS_CHAN_A(chan)) { 2200 status |= IFM_IEEE80211_11A; 2201 } else if (IEEE80211_IS_CHAN_B(chan)) { 2202 status |= IFM_IEEE80211_11B; 2203 } else if (IEEE80211_IS_CHAN_ANYG(chan)) { 2204 status |= IFM_IEEE80211_11G; 2205 } else if (IEEE80211_IS_CHAN_FHSS(chan)) { 2206 status |= IFM_IEEE80211_FH; 2207 } 2208 /* XXX else complain? */ 2209 2210 if (IEEE80211_IS_CHAN_TURBO(chan)) 2211 status |= IFM_IEEE80211_TURBO; 2212 #if 0 2213 if (IEEE80211_IS_CHAN_HT20(chan)) 2214 status |= IFM_IEEE80211_HT20; 2215 if (IEEE80211_IS_CHAN_HT40(chan)) 2216 status |= IFM_IEEE80211_HT40; 2217 #endif 2218 return status; 2219 } 2220 2221 void 2222 ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr) 2223 { 2224 struct ieee80211vap *vap = ifp->if_softc; 2225 struct ieee80211com *ic = vap->iv_ic; 2226 enum ieee80211_phymode mode; 2227 2228 imr->ifm_status = IFM_AVALID; 2229 /* 2230 * NB: use the current channel's mode to lock down a xmit 2231 * rate only when running; otherwise we may have a mismatch 2232 * in which case the rate will not be convertible. 2233 */ 2234 if (vap->iv_state == IEEE80211_S_RUN || 2235 vap->iv_state == IEEE80211_S_SLEEP) { 2236 imr->ifm_status |= IFM_ACTIVE; 2237 mode = ieee80211_chan2mode(ic->ic_curchan); 2238 } else 2239 mode = IEEE80211_MODE_AUTO; 2240 imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan); 2241 /* 2242 * Calculate a current rate if possible. 2243 */ 2244 if (vap->iv_txparms[mode].ucastrate != IEEE80211_FIXED_RATE_NONE) { 2245 /* 2246 * A fixed rate is set, report that. 2247 */ 2248 imr->ifm_active |= ieee80211_rate2media(ic, 2249 vap->iv_txparms[mode].ucastrate, mode); 2250 } else if (vap->iv_opmode == IEEE80211_M_STA) { 2251 /* 2252 * In station mode report the current transmit rate. 2253 */ 2254 imr->ifm_active |= ieee80211_rate2media(ic, 2255 vap->iv_bss->ni_txrate, mode); 2256 } else 2257 imr->ifm_active |= IFM_AUTO; 2258 if (imr->ifm_status & IFM_ACTIVE) 2259 imr->ifm_current = imr->ifm_active; 2260 } 2261 2262 /* 2263 * Set the current phy mode and recalculate the active channel 2264 * set based on the available channels for this mode. Also 2265 * select a new default/current channel if the current one is 2266 * inappropriate for this mode. 2267 */ 2268 int 2269 ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode) 2270 { 2271 /* 2272 * Adjust basic rates in 11b/11g supported rate set. 2273 * Note that if operating on a hal/quarter rate channel 2274 * this is a noop as those rates sets are different 2275 * and used instead. 2276 */ 2277 if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B) 2278 ieee80211_setbasicrates(&ic->ic_sup_rates[mode], mode); 2279 2280 ic->ic_curmode = mode; 2281 ieee80211_reset_erp(ic); /* reset ERP state */ 2282 2283 return 0; 2284 } 2285 2286 /* 2287 * Return the phy mode for with the specified channel. 2288 */ 2289 enum ieee80211_phymode 2290 ieee80211_chan2mode(const struct ieee80211_channel *chan) 2291 { 2292 2293 if (IEEE80211_IS_CHAN_VHT_2GHZ(chan)) 2294 return IEEE80211_MODE_VHT_2GHZ; 2295 else if (IEEE80211_IS_CHAN_VHT_5GHZ(chan)) 2296 return IEEE80211_MODE_VHT_5GHZ; 2297 else if (IEEE80211_IS_CHAN_HTA(chan)) 2298 return IEEE80211_MODE_11NA; 2299 else if (IEEE80211_IS_CHAN_HTG(chan)) 2300 return IEEE80211_MODE_11NG; 2301 else if (IEEE80211_IS_CHAN_108G(chan)) 2302 return IEEE80211_MODE_TURBO_G; 2303 else if (IEEE80211_IS_CHAN_ST(chan)) 2304 return IEEE80211_MODE_STURBO_A; 2305 else if (IEEE80211_IS_CHAN_TURBO(chan)) 2306 return IEEE80211_MODE_TURBO_A; 2307 else if (IEEE80211_IS_CHAN_HALF(chan)) 2308 return IEEE80211_MODE_HALF; 2309 else if (IEEE80211_IS_CHAN_QUARTER(chan)) 2310 return IEEE80211_MODE_QUARTER; 2311 else if (IEEE80211_IS_CHAN_A(chan)) 2312 return IEEE80211_MODE_11A; 2313 else if (IEEE80211_IS_CHAN_ANYG(chan)) 2314 return IEEE80211_MODE_11G; 2315 else if (IEEE80211_IS_CHAN_B(chan)) 2316 return IEEE80211_MODE_11B; 2317 else if (IEEE80211_IS_CHAN_FHSS(chan)) 2318 return IEEE80211_MODE_FH; 2319 2320 /* NB: should not get here */ 2321 printf("%s: cannot map channel to mode; freq %u flags 0x%x\n", 2322 __func__, chan->ic_freq, chan->ic_flags); 2323 return IEEE80211_MODE_11B; 2324 } 2325 2326 struct ratemedia { 2327 u_int match; /* rate + mode */ 2328 u_int media; /* if_media rate */ 2329 }; 2330 2331 static int 2332 findmedia(const struct ratemedia rates[], int n, u_int match) 2333 { 2334 int i; 2335 2336 for (i = 0; i < n; i++) 2337 if (rates[i].match == match) 2338 return rates[i].media; 2339 return IFM_AUTO; 2340 } 2341 2342 /* 2343 * Convert IEEE80211 rate value to ifmedia subtype. 2344 * Rate is either a legacy rate in units of 0.5Mbps 2345 * or an MCS index. 2346 */ 2347 int 2348 ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode) 2349 { 2350 static const struct ratemedia rates[] = { 2351 { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 }, 2352 { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 }, 2353 { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 }, 2354 { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 }, 2355 { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 }, 2356 { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 }, 2357 { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 }, 2358 { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 }, 2359 { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 }, 2360 { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 }, 2361 { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 }, 2362 { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 }, 2363 { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 }, 2364 { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 }, 2365 { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 }, 2366 { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 }, 2367 { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 }, 2368 { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 }, 2369 { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 }, 2370 { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 }, 2371 { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 }, 2372 { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 }, 2373 { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 }, 2374 { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 }, 2375 { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 }, 2376 { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 }, 2377 { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 }, 2378 { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 }, 2379 { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 }, 2380 { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 }, 2381 /* NB: OFDM72 doesn't really exist so we don't handle it */ 2382 }; 2383 static const struct ratemedia htrates[] = { 2384 { 0, IFM_IEEE80211_MCS }, 2385 { 1, IFM_IEEE80211_MCS }, 2386 { 2, IFM_IEEE80211_MCS }, 2387 { 3, IFM_IEEE80211_MCS }, 2388 { 4, IFM_IEEE80211_MCS }, 2389 { 5, IFM_IEEE80211_MCS }, 2390 { 6, IFM_IEEE80211_MCS }, 2391 { 7, IFM_IEEE80211_MCS }, 2392 { 8, IFM_IEEE80211_MCS }, 2393 { 9, IFM_IEEE80211_MCS }, 2394 { 10, IFM_IEEE80211_MCS }, 2395 { 11, IFM_IEEE80211_MCS }, 2396 { 12, IFM_IEEE80211_MCS }, 2397 { 13, IFM_IEEE80211_MCS }, 2398 { 14, IFM_IEEE80211_MCS }, 2399 { 15, IFM_IEEE80211_MCS }, 2400 { 16, IFM_IEEE80211_MCS }, 2401 { 17, IFM_IEEE80211_MCS }, 2402 { 18, IFM_IEEE80211_MCS }, 2403 { 19, IFM_IEEE80211_MCS }, 2404 { 20, IFM_IEEE80211_MCS }, 2405 { 21, IFM_IEEE80211_MCS }, 2406 { 22, IFM_IEEE80211_MCS }, 2407 { 23, IFM_IEEE80211_MCS }, 2408 { 24, IFM_IEEE80211_MCS }, 2409 { 25, IFM_IEEE80211_MCS }, 2410 { 26, IFM_IEEE80211_MCS }, 2411 { 27, IFM_IEEE80211_MCS }, 2412 { 28, IFM_IEEE80211_MCS }, 2413 { 29, IFM_IEEE80211_MCS }, 2414 { 30, IFM_IEEE80211_MCS }, 2415 { 31, IFM_IEEE80211_MCS }, 2416 { 32, IFM_IEEE80211_MCS }, 2417 { 33, IFM_IEEE80211_MCS }, 2418 { 34, IFM_IEEE80211_MCS }, 2419 { 35, IFM_IEEE80211_MCS }, 2420 { 36, IFM_IEEE80211_MCS }, 2421 { 37, IFM_IEEE80211_MCS }, 2422 { 38, IFM_IEEE80211_MCS }, 2423 { 39, IFM_IEEE80211_MCS }, 2424 { 40, IFM_IEEE80211_MCS }, 2425 { 41, IFM_IEEE80211_MCS }, 2426 { 42, IFM_IEEE80211_MCS }, 2427 { 43, IFM_IEEE80211_MCS }, 2428 { 44, IFM_IEEE80211_MCS }, 2429 { 45, IFM_IEEE80211_MCS }, 2430 { 46, IFM_IEEE80211_MCS }, 2431 { 47, IFM_IEEE80211_MCS }, 2432 { 48, IFM_IEEE80211_MCS }, 2433 { 49, IFM_IEEE80211_MCS }, 2434 { 50, IFM_IEEE80211_MCS }, 2435 { 51, IFM_IEEE80211_MCS }, 2436 { 52, IFM_IEEE80211_MCS }, 2437 { 53, IFM_IEEE80211_MCS }, 2438 { 54, IFM_IEEE80211_MCS }, 2439 { 55, IFM_IEEE80211_MCS }, 2440 { 56, IFM_IEEE80211_MCS }, 2441 { 57, IFM_IEEE80211_MCS }, 2442 { 58, IFM_IEEE80211_MCS }, 2443 { 59, IFM_IEEE80211_MCS }, 2444 { 60, IFM_IEEE80211_MCS }, 2445 { 61, IFM_IEEE80211_MCS }, 2446 { 62, IFM_IEEE80211_MCS }, 2447 { 63, IFM_IEEE80211_MCS }, 2448 { 64, IFM_IEEE80211_MCS }, 2449 { 65, IFM_IEEE80211_MCS }, 2450 { 66, IFM_IEEE80211_MCS }, 2451 { 67, IFM_IEEE80211_MCS }, 2452 { 68, IFM_IEEE80211_MCS }, 2453 { 69, IFM_IEEE80211_MCS }, 2454 { 70, IFM_IEEE80211_MCS }, 2455 { 71, IFM_IEEE80211_MCS }, 2456 { 72, IFM_IEEE80211_MCS }, 2457 { 73, IFM_IEEE80211_MCS }, 2458 { 74, IFM_IEEE80211_MCS }, 2459 { 75, IFM_IEEE80211_MCS }, 2460 { 76, IFM_IEEE80211_MCS }, 2461 }; 2462 int m; 2463 2464 /* 2465 * Check 11n rates first for match as an MCS. 2466 */ 2467 if (mode == IEEE80211_MODE_11NA) { 2468 if (rate & IEEE80211_RATE_MCS) { 2469 rate &= ~IEEE80211_RATE_MCS; 2470 m = findmedia(htrates, nitems(htrates), rate); 2471 if (m != IFM_AUTO) 2472 return m | IFM_IEEE80211_11NA; 2473 } 2474 } else if (mode == IEEE80211_MODE_11NG) { 2475 /* NB: 12 is ambiguous, it will be treated as an MCS */ 2476 if (rate & IEEE80211_RATE_MCS) { 2477 rate &= ~IEEE80211_RATE_MCS; 2478 m = findmedia(htrates, nitems(htrates), rate); 2479 if (m != IFM_AUTO) 2480 return m | IFM_IEEE80211_11NG; 2481 } 2482 } 2483 rate &= IEEE80211_RATE_VAL; 2484 switch (mode) { 2485 case IEEE80211_MODE_11A: 2486 case IEEE80211_MODE_HALF: /* XXX good 'nuf */ 2487 case IEEE80211_MODE_QUARTER: 2488 case IEEE80211_MODE_11NA: 2489 case IEEE80211_MODE_TURBO_A: 2490 case IEEE80211_MODE_STURBO_A: 2491 return findmedia(rates, nitems(rates), 2492 rate | IFM_IEEE80211_11A); 2493 case IEEE80211_MODE_11B: 2494 return findmedia(rates, nitems(rates), 2495 rate | IFM_IEEE80211_11B); 2496 case IEEE80211_MODE_FH: 2497 return findmedia(rates, nitems(rates), 2498 rate | IFM_IEEE80211_FH); 2499 case IEEE80211_MODE_AUTO: 2500 /* NB: ic may be NULL for some drivers */ 2501 if (ic != NULL && ic->ic_phytype == IEEE80211_T_FH) 2502 return findmedia(rates, nitems(rates), 2503 rate | IFM_IEEE80211_FH); 2504 /* NB: hack, 11g matches both 11b+11a rates */ 2505 /* fall thru... */ 2506 case IEEE80211_MODE_11G: 2507 case IEEE80211_MODE_11NG: 2508 case IEEE80211_MODE_TURBO_G: 2509 return findmedia(rates, nitems(rates), rate | IFM_IEEE80211_11G); 2510 case IEEE80211_MODE_VHT_2GHZ: 2511 case IEEE80211_MODE_VHT_5GHZ: 2512 /* XXX TODO: need to figure out mapping for VHT rates */ 2513 return IFM_AUTO; 2514 } 2515 return IFM_AUTO; 2516 } 2517 2518 int 2519 ieee80211_media2rate(int mword) 2520 { 2521 static const int ieeerates[] = { 2522 -1, /* IFM_AUTO */ 2523 0, /* IFM_MANUAL */ 2524 0, /* IFM_NONE */ 2525 2, /* IFM_IEEE80211_FH1 */ 2526 4, /* IFM_IEEE80211_FH2 */ 2527 2, /* IFM_IEEE80211_DS1 */ 2528 4, /* IFM_IEEE80211_DS2 */ 2529 11, /* IFM_IEEE80211_DS5 */ 2530 22, /* IFM_IEEE80211_DS11 */ 2531 44, /* IFM_IEEE80211_DS22 */ 2532 12, /* IFM_IEEE80211_OFDM6 */ 2533 18, /* IFM_IEEE80211_OFDM9 */ 2534 24, /* IFM_IEEE80211_OFDM12 */ 2535 36, /* IFM_IEEE80211_OFDM18 */ 2536 48, /* IFM_IEEE80211_OFDM24 */ 2537 72, /* IFM_IEEE80211_OFDM36 */ 2538 96, /* IFM_IEEE80211_OFDM48 */ 2539 108, /* IFM_IEEE80211_OFDM54 */ 2540 144, /* IFM_IEEE80211_OFDM72 */ 2541 0, /* IFM_IEEE80211_DS354k */ 2542 0, /* IFM_IEEE80211_DS512k */ 2543 6, /* IFM_IEEE80211_OFDM3 */ 2544 9, /* IFM_IEEE80211_OFDM4 */ 2545 54, /* IFM_IEEE80211_OFDM27 */ 2546 -1, /* IFM_IEEE80211_MCS */ 2547 -1, /* IFM_IEEE80211_VHT */ 2548 }; 2549 return IFM_SUBTYPE(mword) < nitems(ieeerates) ? 2550 ieeerates[IFM_SUBTYPE(mword)] : 0; 2551 } 2552 2553 /* 2554 * The following hash function is adapted from "Hash Functions" by Bob Jenkins 2555 * ("Algorithm Alley", Dr. Dobbs Journal, September 1997). 2556 */ 2557 #define mix(a, b, c) \ 2558 do { \ 2559 a -= b; a -= c; a ^= (c >> 13); \ 2560 b -= c; b -= a; b ^= (a << 8); \ 2561 c -= a; c -= b; c ^= (b >> 13); \ 2562 a -= b; a -= c; a ^= (c >> 12); \ 2563 b -= c; b -= a; b ^= (a << 16); \ 2564 c -= a; c -= b; c ^= (b >> 5); \ 2565 a -= b; a -= c; a ^= (c >> 3); \ 2566 b -= c; b -= a; b ^= (a << 10); \ 2567 c -= a; c -= b; c ^= (b >> 15); \ 2568 } while (/*CONSTCOND*/0) 2569 2570 uint32_t 2571 ieee80211_mac_hash(const struct ieee80211com *ic, 2572 const uint8_t addr[IEEE80211_ADDR_LEN]) 2573 { 2574 uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = ic->ic_hash_key; 2575 2576 b += addr[5] << 8; 2577 b += addr[4]; 2578 a += addr[3] << 24; 2579 a += addr[2] << 16; 2580 a += addr[1] << 8; 2581 a += addr[0]; 2582 2583 mix(a, b, c); 2584 2585 return c; 2586 } 2587 #undef mix 2588 2589 char 2590 ieee80211_channel_type_char(const struct ieee80211_channel *c) 2591 { 2592 if (IEEE80211_IS_CHAN_ST(c)) 2593 return 'S'; 2594 if (IEEE80211_IS_CHAN_108A(c)) 2595 return 'T'; 2596 if (IEEE80211_IS_CHAN_108G(c)) 2597 return 'G'; 2598 if (IEEE80211_IS_CHAN_VHT(c)) 2599 return 'v'; 2600 if (IEEE80211_IS_CHAN_HT(c)) 2601 return 'n'; 2602 if (IEEE80211_IS_CHAN_A(c)) 2603 return 'a'; 2604 if (IEEE80211_IS_CHAN_ANYG(c)) 2605 return 'g'; 2606 if (IEEE80211_IS_CHAN_B(c)) 2607 return 'b'; 2608 return 'f'; 2609 } 2610
Indexes created Thu Oct 02 10:09:58 GMT 2025