ieee80211.c revision 173861
1/*- 2 * Copyright (c) 2001 Atsushi Onoe 3 * Copyright (c) 2002-2007 Sam Leffler, Errno Consulting 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD: head/sys/net80211/ieee80211.c 173861 2007-11-23 05:57:20Z sam $"); 29 30/* 31 * IEEE 802.11 generic handler 32 */ 33 34#include <sys/param.h> 35#include <sys/systm.h> 36#include <sys/kernel.h> 37 38#include <sys/socket.h> 39 40#include <net/if.h> 41#include <net/if_media.h> 42#include <net/ethernet.h> 43 44#include <net80211/ieee80211_var.h> 45 46#include <net/bpf.h> 47 48const char *ieee80211_phymode_name[] = { 49 "auto", /* IEEE80211_MODE_AUTO */ 50 "11a", /* IEEE80211_MODE_11A */ 51 "11b", /* IEEE80211_MODE_11B */ 52 "11g", /* IEEE80211_MODE_11G */ 53 "FH", /* IEEE80211_MODE_FH */ 54 "turboA", /* IEEE80211_MODE_TURBO_A */ 55 "turboG", /* IEEE80211_MODE_TURBO_G */ 56 "sturboA", /* IEEE80211_MODE_STURBO_A */ 57 "11na", /* IEEE80211_MODE_11NA */ 58 "11ng", /* IEEE80211_MODE_11NG */ 59}; 60 61/* 62 * Default supported rates for 802.11 operation (in IEEE .5Mb units). 63 */ 64#define B(r) ((r) | IEEE80211_RATE_BASIC) 65static const struct ieee80211_rateset ieee80211_rateset_11a = 66 { 8, { B(12), 18, B(24), 36, B(48), 72, 96, 108 } }; 67static const struct ieee80211_rateset ieee80211_rateset_half = 68 { 8, { B(6), 9, B(12), 18, B(24), 36, 48, 54 } }; 69static const struct ieee80211_rateset ieee80211_rateset_quarter = 70 { 8, { B(3), 4, B(6), 9, B(12), 18, 24, 27 } }; 71static const struct ieee80211_rateset ieee80211_rateset_11b = 72 { 4, { B(2), B(4), B(11), B(22) } }; 73/* NB: OFDM rates are handled specially based on mode */ 74static const struct ieee80211_rateset ieee80211_rateset_11g = 75 { 12, { B(2), B(4), B(11), B(22), 12, 18, 24, 36, 48, 72, 96, 108 } }; 76#undef B 77 78static int media_status(enum ieee80211_opmode , 79 const struct ieee80211_channel *); 80 81/* list of all instances */ 82SLIST_HEAD(ieee80211_list, ieee80211com); 83static struct ieee80211_list ieee80211_list = 84 SLIST_HEAD_INITIALIZER(ieee80211_list); 85static uint8_t ieee80211_vapmap[32]; /* enough for 256 */ 86static struct mtx ieee80211_vap_mtx; 87MTX_SYSINIT(ieee80211, &ieee80211_vap_mtx, "net80211 instances", MTX_DEF); 88 89static void 90ieee80211_add_vap(struct ieee80211com *ic) 91{ 92#define N(a) (sizeof(a)/sizeof(a[0])) 93 int i; 94 uint8_t b; 95 96 mtx_lock(&ieee80211_vap_mtx); 97 ic->ic_vap = 0; 98 for (i = 0; i < N(ieee80211_vapmap) && ieee80211_vapmap[i] == 0xff; i++) 99 ic->ic_vap += NBBY; 100 if (i == N(ieee80211_vapmap)) 101 panic("vap table full"); 102 for (b = ieee80211_vapmap[i]; b & 1; b >>= 1) 103 ic->ic_vap++; 104 setbit(ieee80211_vapmap, ic->ic_vap); 105 SLIST_INSERT_HEAD(&ieee80211_list, ic, ic_next); 106 mtx_unlock(&ieee80211_vap_mtx); 107#undef N 108} 109 110static void 111ieee80211_remove_vap(struct ieee80211com *ic) 112{ 113 mtx_lock(&ieee80211_vap_mtx); 114 SLIST_REMOVE(&ieee80211_list, ic, ieee80211com, ic_next); 115 KASSERT(ic->ic_vap < sizeof(ieee80211_vapmap)*NBBY, 116 ("invalid vap id %d", ic->ic_vap)); 117 KASSERT(isset(ieee80211_vapmap, ic->ic_vap), 118 ("vap id %d not allocated", ic->ic_vap)); 119 clrbit(ieee80211_vapmap, ic->ic_vap); 120 mtx_unlock(&ieee80211_vap_mtx); 121} 122 123/* 124 * Default reset method for use with the ioctl support. This 125 * method is invoked after any state change in the 802.11 126 * layer that should be propagated to the hardware but not 127 * require re-initialization of the 802.11 state machine (e.g 128 * rescanning for an ap). We always return ENETRESET which 129 * should cause the driver to re-initialize the device. Drivers 130 * can override this method to implement more optimized support. 131 */ 132static int 133ieee80211_default_reset(struct ifnet *ifp) 134{ 135 return ENETRESET; 136} 137 138/* 139 * Fill in 802.11 available channel set, mark 140 * all available channels as active, and pick 141 * a default channel if not already specified. 142 */ 143static void 144ieee80211_chan_init(struct ieee80211com *ic) 145{ 146#define DEFAULTRATES(m, def) do { \ 147 if (isset(ic->ic_modecaps, m) && ic->ic_sup_rates[m].rs_nrates == 0) \ 148 ic->ic_sup_rates[m] = def; \ 149} while (0) 150 struct ieee80211_channel *c; 151 int i; 152 153 KASSERT(0 < ic->ic_nchans && ic->ic_nchans < IEEE80211_CHAN_MAX, 154 ("invalid number of channels specified: %u", ic->ic_nchans)); 155 memset(ic->ic_chan_avail, 0, sizeof(ic->ic_chan_avail)); 156 setbit(ic->ic_modecaps, IEEE80211_MODE_AUTO); 157 for (i = 0; i < ic->ic_nchans; i++) { 158 c = &ic->ic_channels[i]; 159 KASSERT(c->ic_flags != 0, ("channel with no flags")); 160 KASSERT(c->ic_ieee < IEEE80211_CHAN_MAX, 161 ("channel with bogus ieee number %u", c->ic_ieee)); 162 setbit(ic->ic_chan_avail, c->ic_ieee); 163 /* 164 * Identify mode capabilities. 165 */ 166 if (IEEE80211_IS_CHAN_A(c)) 167 setbit(ic->ic_modecaps, IEEE80211_MODE_11A); 168 if (IEEE80211_IS_CHAN_B(c)) 169 setbit(ic->ic_modecaps, IEEE80211_MODE_11B); 170 if (IEEE80211_IS_CHAN_ANYG(c)) 171 setbit(ic->ic_modecaps, IEEE80211_MODE_11G); 172 if (IEEE80211_IS_CHAN_FHSS(c)) 173 setbit(ic->ic_modecaps, IEEE80211_MODE_FH); 174 if (IEEE80211_IS_CHAN_108A(c)) 175 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_A); 176 if (IEEE80211_IS_CHAN_108G(c)) 177 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_G); 178 if (IEEE80211_IS_CHAN_ST(c)) 179 setbit(ic->ic_modecaps, IEEE80211_MODE_STURBO_A); 180 if (IEEE80211_IS_CHAN_HTA(c)) 181 setbit(ic->ic_modecaps, IEEE80211_MODE_11NA); 182 if (IEEE80211_IS_CHAN_HTG(c)) 183 setbit(ic->ic_modecaps, IEEE80211_MODE_11NG); 184 } 185 /* initialize candidate channels to all available */ 186 memcpy(ic->ic_chan_active, ic->ic_chan_avail, 187 sizeof(ic->ic_chan_avail)); 188 189 ic->ic_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */ 190 ic->ic_bsschan = IEEE80211_CHAN_ANYC; 191 ic->ic_prevchan = NULL; 192 /* arbitrarily pick the first channel */ 193 ic->ic_curchan = &ic->ic_channels[0]; 194 195 /* fillin well-known rate sets if driver has not specified */ 196 DEFAULTRATES(IEEE80211_MODE_11B, ieee80211_rateset_11b); 197 DEFAULTRATES(IEEE80211_MODE_11G, ieee80211_rateset_11g); 198 DEFAULTRATES(IEEE80211_MODE_11A, ieee80211_rateset_11a); 199 DEFAULTRATES(IEEE80211_MODE_TURBO_A, ieee80211_rateset_11a); 200 DEFAULTRATES(IEEE80211_MODE_TURBO_G, ieee80211_rateset_11g); 201 202 /* 203 * Set auto mode to reset active channel state and any desired channel. 204 */ 205 (void) ieee80211_setmode(ic, IEEE80211_MODE_AUTO); 206#undef DEFAULTRATES 207} 208 209void 210ieee80211_ifattach(struct ieee80211com *ic) 211{ 212 struct ifnet *ifp = ic->ic_ifp; 213 214 ether_ifattach(ifp, ic->ic_myaddr); 215 ifp->if_output = ieee80211_output; 216 217 bpfattach2(ifp, DLT_IEEE802_11, 218 sizeof(struct ieee80211_frame_addr4), &ic->ic_rawbpf); 219 220 /* override the 802.3 setting */ 221 ifp->if_hdrlen = ic->ic_headroom 222 + sizeof(struct ieee80211_qosframe_addr4) 223 + IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN 224 + IEEE80211_WEP_EXTIVLEN; 225 /* XXX no way to recalculate on ifdetach */ 226 if (ALIGN(ifp->if_hdrlen) > max_linkhdr) { 227 /* XXX sanity check... */ 228 max_linkhdr = ALIGN(ifp->if_hdrlen); 229 max_hdr = max_linkhdr + max_protohdr; 230 max_datalen = MHLEN - max_hdr; 231 } 232 233 /* 234 * Fill in 802.11 available channel set, mark all 235 * available channels as active, and pick a default 236 * channel if not already specified. 237 */ 238 ieee80211_chan_init(ic); 239 240 if (ic->ic_caps & IEEE80211_C_BGSCAN) /* enable if capable */ 241 ic->ic_flags |= IEEE80211_F_BGSCAN; 242#if 0 243 /* XXX not until WME+WPA issues resolved */ 244 if (ic->ic_caps & IEEE80211_C_WME) /* enable if capable */ 245 ic->ic_flags |= IEEE80211_F_WME; 246#endif 247 if (ic->ic_caps & IEEE80211_C_BURST) 248 ic->ic_flags |= IEEE80211_F_BURST; 249 ic->ic_flags |= IEEE80211_F_DOTH; /* XXX out of caps, just ena */ 250 251 ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT; 252 ic->ic_bmissthreshold = IEEE80211_HWBMISS_DEFAULT; 253 ic->ic_dtim_period = IEEE80211_DTIM_DEFAULT; 254 IEEE80211_LOCK_INIT(ic, "ieee80211com"); 255 IEEE80211_BEACON_LOCK_INIT(ic, "beacon"); 256 257 ic->ic_lintval = ic->ic_bintval; 258 ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX; 259 260 ieee80211_crypto_attach(ic); 261 ieee80211_node_attach(ic); 262 ieee80211_power_attach(ic); 263 ieee80211_proto_attach(ic); 264 ieee80211_ht_attach(ic); 265 ieee80211_scan_attach(ic); 266 267 ieee80211_add_vap(ic); 268 269 ieee80211_sysctl_attach(ic); /* NB: requires ic_vap */ 270 271 /* 272 * Install a default reset method for the ioctl support. 273 * The driver is expected to fill this in before calling us. 274 */ 275 if (ic->ic_reset == NULL) 276 ic->ic_reset = ieee80211_default_reset; 277 278 KASSERT(ifp->if_spare2 == NULL, ("oops, hosed")); 279 ifp->if_spare2 = ic; /* XXX temp backpointer */ 280} 281 282void 283ieee80211_ifdetach(struct ieee80211com *ic) 284{ 285 struct ifnet *ifp = ic->ic_ifp; 286 287 ieee80211_remove_vap(ic); 288 289 ieee80211_sysctl_detach(ic); 290 ieee80211_scan_detach(ic); 291 ieee80211_ht_detach(ic); 292 /* NB: must be called before ieee80211_node_detach */ 293 ieee80211_proto_detach(ic); 294 ieee80211_crypto_detach(ic); 295 ieee80211_power_detach(ic); 296 ieee80211_node_detach(ic); 297 ifmedia_removeall(&ic->ic_media); 298 299 IEEE80211_LOCK_DESTROY(ic); 300 IEEE80211_BEACON_LOCK_DESTROY(ic); 301 302 bpfdetach(ifp); 303 ether_ifdetach(ifp); 304} 305 306static __inline int 307mapgsm(u_int freq, u_int flags) 308{ 309 freq *= 10; 310 if (flags & IEEE80211_CHAN_QUARTER) 311 freq += 5; 312 else if (flags & IEEE80211_CHAN_HALF) 313 freq += 10; 314 else 315 freq += 20; 316 /* NB: there is no 907/20 wide but leave room */ 317 return (freq - 906*10) / 5; 318} 319 320static __inline int 321mappsb(u_int freq, u_int flags) 322{ 323 return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5; 324} 325 326/* 327 * Convert MHz frequency to IEEE channel number. 328 */ 329int 330ieee80211_mhz2ieee(u_int freq, u_int flags) 331{ 332#define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990) 333 if (flags & IEEE80211_CHAN_GSM) 334 return mapgsm(freq, flags); 335 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 336 if (freq == 2484) 337 return 14; 338 if (freq < 2484) 339 return ((int) freq - 2407) / 5; 340 else 341 return 15 + ((freq - 2512) / 20); 342 } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */ 343 if (freq <= 5000) { 344 /* XXX check regdomain? */ 345 if (IS_FREQ_IN_PSB(freq)) 346 return mappsb(freq, flags); 347 return (freq - 4000) / 5; 348 } else 349 return (freq - 5000) / 5; 350 } else { /* either, guess */ 351 if (freq == 2484) 352 return 14; 353 if (freq < 2484) { 354 if (907 <= freq && freq <= 922) 355 return mapgsm(freq, flags); 356 return ((int) freq - 2407) / 5; 357 } 358 if (freq < 5000) { 359 if (IS_FREQ_IN_PSB(freq)) 360 return mappsb(freq, flags); 361 else if (freq > 4900) 362 return (freq - 4000) / 5; 363 else 364 return 15 + ((freq - 2512) / 20); 365 } 366 return (freq - 5000) / 5; 367 } 368#undef IS_FREQ_IN_PSB 369} 370 371/* 372 * Convert channel to IEEE channel number. 373 */ 374int 375ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c) 376{ 377 if (c == NULL) { 378 if_printf(ic->ic_ifp, "invalid channel (NULL)\n"); 379 return 0; /* XXX */ 380 } 381 return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee); 382} 383 384/* 385 * Convert IEEE channel number to MHz frequency. 386 */ 387u_int 388ieee80211_ieee2mhz(u_int chan, u_int flags) 389{ 390 if (flags & IEEE80211_CHAN_GSM) 391 return 907 + 5 * (chan / 10); 392 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 393 if (chan == 14) 394 return 2484; 395 if (chan < 14) 396 return 2407 + chan*5; 397 else 398 return 2512 + ((chan-15)*20); 399 } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */ 400 if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) { 401 chan -= 37; 402 return 4940 + chan*5 + (chan % 5 ? 2 : 0); 403 } 404 return 5000 + (chan*5); 405 } else { /* either, guess */ 406 /* XXX can't distinguish PSB+GSM channels */ 407 if (chan == 14) 408 return 2484; 409 if (chan < 14) /* 0-13 */ 410 return 2407 + chan*5; 411 if (chan < 27) /* 15-26 */ 412 return 2512 + ((chan-15)*20); 413 return 5000 + (chan*5); 414 } 415} 416 417/* 418 * Locate a channel given a frequency+flags. We cache 419 * the previous lookup to optimize swithing between two 420 * channels--as happens with dynamic turbo. 421 */ 422struct ieee80211_channel * 423ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags) 424{ 425 struct ieee80211_channel *c; 426 int i; 427 428 flags &= IEEE80211_CHAN_ALLTURBO; 429 c = ic->ic_prevchan; 430 if (c != NULL && c->ic_freq == freq && 431 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 432 return c; 433 /* brute force search */ 434 for (i = 0; i < ic->ic_nchans; i++) { 435 c = &ic->ic_channels[i]; 436 if (c->ic_freq == freq && 437 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 438 return c; 439 } 440 return NULL; 441} 442 443/* 444 * Locate a channel given a channel number+flags. We cache 445 * the previous lookup to optimize switching between two 446 * channels--as happens with dynamic turbo. 447 */ 448struct ieee80211_channel * 449ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags) 450{ 451 struct ieee80211_channel *c; 452 int i; 453 454 flags &= IEEE80211_CHAN_ALLTURBO; 455 c = ic->ic_prevchan; 456 if (c != NULL && c->ic_ieee == ieee && 457 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 458 return c; 459 /* brute force search */ 460 for (i = 0; i < ic->ic_nchans; i++) { 461 c = &ic->ic_channels[i]; 462 if (c->ic_ieee == ieee && 463 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 464 return c; 465 } 466 return NULL; 467} 468 469static void 470addmedia(struct ieee80211com *ic, int mode, int mword) 471{ 472#define TURBO(m) ((m) | IFM_IEEE80211_TURBO) 473#define ADD(_ic, _s, _o) \ 474 ifmedia_add(&(_ic)->ic_media, \ 475 IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL) 476 static const u_int mopts[IEEE80211_MODE_MAX] = { 477 IFM_AUTO, /* IEEE80211_MODE_AUTO */ 478 IFM_IEEE80211_11A, /* IEEE80211_MODE_11A */ 479 IFM_IEEE80211_11B, /* IEEE80211_MODE_11B */ 480 IFM_IEEE80211_11G, /* IEEE80211_MODE_11G */ 481 IFM_IEEE80211_FH, /* IEEE80211_MODE_FH */ 482 TURBO(IFM_IEEE80211_11A), /* IEEE80211_MODE_TURBO_A */ 483 TURBO(IFM_IEEE80211_11G), /* IEEE80211_MODE_TURBO_G */ 484 TURBO(IFM_IEEE80211_11A), /* IEEE80211_MODE_STURBO_A */ 485 IFM_IEEE80211_11NA, /* IEEE80211_MODE_11NA */ 486 IFM_IEEE80211_11NG, /* IEEE80211_MODE_11NG */ 487 }; 488 u_int mopt; 489 490 KASSERT(mode < IEEE80211_MODE_MAX, ("bad mode %u", mode)); 491 mopt = mopts[mode]; 492 KASSERT(mopt != 0 || mode == IEEE80211_MODE_AUTO, 493 ("no media mapping for mode %u", mode)); 494 495 ADD(ic, mword, mopt); /* e.g. 11a auto */ 496 if (ic->ic_caps & IEEE80211_C_IBSS) 497 ADD(ic, mword, mopt | IFM_IEEE80211_ADHOC); 498 if (ic->ic_caps & IEEE80211_C_HOSTAP) 499 ADD(ic, mword, mopt | IFM_IEEE80211_HOSTAP); 500 if (ic->ic_caps & IEEE80211_C_AHDEMO) 501 ADD(ic, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0); 502 if (ic->ic_caps & IEEE80211_C_MONITOR) 503 ADD(ic, mword, mopt | IFM_IEEE80211_MONITOR); 504#undef ADD 505#undef TURBO 506} 507 508/* 509 * Setup the media data structures according to the channel and 510 * rate tables. This must be called by the driver after 511 * ieee80211_attach and before most anything else. 512 */ 513void 514ieee80211_media_init(struct ieee80211com *ic, 515 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) 516{ 517 struct ifnet *ifp = ic->ic_ifp; 518 int i, j, mode, rate, maxrate, mword, r; 519 const struct ieee80211_rateset *rs; 520 struct ieee80211_rateset allrates; 521 522 /* NB: this works because the structure is initialized to zero */ 523 if (LIST_EMPTY(&ic->ic_media.ifm_list)) { 524 /* 525 * Do late attach work that must wait for any subclass 526 * (i.e. driver) work such as overriding methods. 527 */ 528 ieee80211_node_lateattach(ic); 529 } else { 530 /* 531 * We are re-initializing the channel list; clear 532 * the existing media state as the media routines 533 * don't suppress duplicates. 534 */ 535 ifmedia_removeall(&ic->ic_media); 536 ieee80211_chan_init(ic); 537 } 538 ieee80211_power_lateattach(ic); 539 540 /* 541 * Fill in media characteristics. 542 */ 543 ifmedia_init(&ic->ic_media, 0, media_change, media_stat); 544 maxrate = 0; 545 /* 546 * Add media for legacy operating modes. 547 */ 548 memset(&allrates, 0, sizeof(allrates)); 549 for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) { 550 if (isclr(ic->ic_modecaps, mode)) 551 continue; 552 addmedia(ic, mode, IFM_AUTO); 553 if (mode == IEEE80211_MODE_AUTO) 554 continue; 555 rs = &ic->ic_sup_rates[mode]; 556 for (i = 0; i < rs->rs_nrates; i++) { 557 rate = rs->rs_rates[i]; 558 mword = ieee80211_rate2media(ic, rate, mode); 559 if (mword == 0) 560 continue; 561 addmedia(ic, mode, mword); 562 /* 563 * Add legacy rate to the collection of all rates. 564 */ 565 r = rate & IEEE80211_RATE_VAL; 566 for (j = 0; j < allrates.rs_nrates; j++) 567 if (allrates.rs_rates[j] == r) 568 break; 569 if (j == allrates.rs_nrates) { 570 /* unique, add to the set */ 571 allrates.rs_rates[j] = r; 572 allrates.rs_nrates++; 573 } 574 rate = (rate & IEEE80211_RATE_VAL) / 2; 575 if (rate > maxrate) 576 maxrate = rate; 577 } 578 } 579 for (i = 0; i < allrates.rs_nrates; i++) { 580 mword = ieee80211_rate2media(ic, allrates.rs_rates[i], 581 IEEE80211_MODE_AUTO); 582 if (mword == 0) 583 continue; 584 /* NB: remove media options from mword */ 585 addmedia(ic, IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword)); 586 } 587 /* 588 * Add HT/11n media. Note that we do not have enough 589 * bits in the media subtype to express the MCS so we 590 * use a "placeholder" media subtype and any fixed MCS 591 * must be specified with a different mechanism. 592 */ 593 for (; mode < IEEE80211_MODE_MAX; mode++) { 594 if (isclr(ic->ic_modecaps, mode)) 595 continue; 596 addmedia(ic, mode, IFM_AUTO); 597 addmedia(ic, mode, IFM_IEEE80211_MCS); 598 } 599 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) || 600 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) { 601 addmedia(ic, IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS); 602 /* XXX could walk htrates */ 603 /* XXX known array size */ 604 if (ieee80211_htrates[15] > maxrate) 605 maxrate = ieee80211_htrates[15]; 606 } 607 608 /* NB: strip explicit mode; we're actually in autoselect */ 609 ifmedia_set(&ic->ic_media, 610 media_status(ic->ic_opmode, ic->ic_curchan) &~ IFM_MMASK); 611 612 if (maxrate) 613 ifp->if_baudrate = IF_Mbps(maxrate); 614} 615 616const struct ieee80211_rateset * 617ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c) 618{ 619 if (IEEE80211_IS_CHAN_HALF(c)) 620 return &ieee80211_rateset_half; 621 if (IEEE80211_IS_CHAN_QUARTER(c)) 622 return &ieee80211_rateset_quarter; 623 if (IEEE80211_IS_CHAN_HTA(c)) 624 return &ic->ic_sup_rates[IEEE80211_MODE_11A]; 625 if (IEEE80211_IS_CHAN_HTG(c)) { 626 /* XXX does this work for basic rates? */ 627 return &ic->ic_sup_rates[IEEE80211_MODE_11G]; 628 } 629 return &ic->ic_sup_rates[ieee80211_chan2mode(c)]; 630} 631 632void 633ieee80211_announce(struct ieee80211com *ic) 634{ 635 struct ifnet *ifp = ic->ic_ifp; 636 int i, mode, rate, mword; 637 const struct ieee80211_rateset *rs; 638 639 /* NB: skip AUTO since it has no rates */ 640 for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) { 641 if (isclr(ic->ic_modecaps, mode)) 642 continue; 643 if_printf(ifp, "%s rates: ", ieee80211_phymode_name[mode]); 644 rs = &ic->ic_sup_rates[mode]; 645 for (i = 0; i < rs->rs_nrates; i++) { 646 mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode); 647 if (mword == 0) 648 continue; 649 rate = ieee80211_media2rate(mword); 650 printf("%s%d%sMbps", (i != 0 ? " " : ""), 651 rate / 2, ((rate & 0x1) != 0 ? ".5" : "")); 652 } 653 printf("\n"); 654 } 655 ieee80211_ht_announce(ic); 656} 657 658void 659ieee80211_announce_channels(struct ieee80211com *ic) 660{ 661 const struct ieee80211_channel *c; 662 char type; 663 int i, cw; 664 665 printf("Chan Freq CW RegPwr MinPwr MaxPwr\n"); 666 for (i = 0; i < ic->ic_nchans; i++) { 667 c = &ic->ic_channels[i]; 668 if (IEEE80211_IS_CHAN_ST(c)) 669 type = 'S'; 670 else if (IEEE80211_IS_CHAN_108A(c)) 671 type = 'T'; 672 else if (IEEE80211_IS_CHAN_108G(c)) 673 type = 'G'; 674 else if (IEEE80211_IS_CHAN_HT(c)) 675 type = 'n'; 676 else if (IEEE80211_IS_CHAN_A(c)) 677 type = 'a'; 678 else if (IEEE80211_IS_CHAN_ANYG(c)) 679 type = 'g'; 680 else if (IEEE80211_IS_CHAN_B(c)) 681 type = 'b'; 682 else 683 type = 'f'; 684 if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c)) 685 cw = 40; 686 else if (IEEE80211_IS_CHAN_HALF(c)) 687 cw = 10; 688 else if (IEEE80211_IS_CHAN_QUARTER(c)) 689 cw = 5; 690 else 691 cw = 20; 692 printf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n" 693 , c->ic_ieee, c->ic_freq, type 694 , cw 695 , IEEE80211_IS_CHAN_HT40U(c) ? '+' : 696 IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' ' 697 , c->ic_maxregpower 698 , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0 699 , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0 700 ); 701 } 702} 703 704/* 705 * Find an instance by it's mac address. 706 */ 707struct ieee80211com * 708ieee80211_find_vap(const uint8_t mac[IEEE80211_ADDR_LEN]) 709{ 710 struct ieee80211com *ic; 711 712 /* XXX lock */ 713 SLIST_FOREACH(ic, &ieee80211_list, ic_next) 714 if (IEEE80211_ADDR_EQ(mac, ic->ic_myaddr)) 715 return ic; 716 return NULL; 717} 718 719static struct ieee80211com * 720ieee80211_find_instance(struct ifnet *ifp) 721{ 722 struct ieee80211com *ic; 723 724 /* XXX lock */ 725 /* XXX not right for multiple instances but works for now */ 726 SLIST_FOREACH(ic, &ieee80211_list, ic_next) 727 if (ic->ic_ifp == ifp) 728 return ic; 729 return NULL; 730} 731 732static int 733findrate(struct ieee80211com *ic, enum ieee80211_phymode mode, int rate) 734{ 735#define IEEERATE(_ic,_m,_i) \ 736 ((_ic)->ic_sup_rates[_m].rs_rates[_i] & IEEE80211_RATE_VAL) 737 int i, nrates = ic->ic_sup_rates[mode].rs_nrates; 738 for (i = 0; i < nrates; i++) 739 if (IEEERATE(ic, mode, i) == rate) 740 return i; 741 return -1; 742#undef IEEERATE 743} 744 745/* 746 * Convert a media specification to a rate index and possibly a mode 747 * (if the rate is fixed and the mode is specified as ``auto'' then 748 * we need to lock down the mode so the index is meanginful). 749 */ 750static int 751checkrate(struct ieee80211com *ic, enum ieee80211_phymode mode, int rate) 752{ 753 754 /* 755 * Check the rate table for the specified/current phy. 756 */ 757 if (mode == IEEE80211_MODE_AUTO) { 758 int i; 759 /* 760 * In autoselect mode search for the rate. 761 */ 762 for (i = IEEE80211_MODE_11A; i < IEEE80211_MODE_MAX; i++) { 763 if (isset(ic->ic_modecaps, i) && 764 findrate(ic, i, rate) != -1) 765 return 1; 766 } 767 return 0; 768 } else { 769 /* 770 * Mode is fixed, check for rate. 771 */ 772 return (findrate(ic, mode, rate) != -1); 773 } 774} 775 776/* 777 * Handle a media change request. 778 */ 779int 780ieee80211_media_change(struct ifnet *ifp) 781{ 782 struct ieee80211com *ic; 783 struct ifmedia_entry *ime; 784 enum ieee80211_opmode newopmode; 785 enum ieee80211_phymode newphymode; 786 int newrate, error = 0; 787 788 ic = ieee80211_find_instance(ifp); 789 if (!ic) { 790 if_printf(ifp, "%s: no 802.11 instance!\n", __func__); 791 return EINVAL; 792 } 793 ime = ic->ic_media.ifm_cur; 794 /* 795 * First, identify the phy mode. 796 */ 797 switch (IFM_MODE(ime->ifm_media)) { 798 case IFM_IEEE80211_11A: 799 newphymode = IEEE80211_MODE_11A; 800 break; 801 case IFM_IEEE80211_11B: 802 newphymode = IEEE80211_MODE_11B; 803 break; 804 case IFM_IEEE80211_11G: 805 newphymode = IEEE80211_MODE_11G; 806 break; 807 case IFM_IEEE80211_FH: 808 newphymode = IEEE80211_MODE_FH; 809 break; 810 case IFM_IEEE80211_11NA: 811 newphymode = IEEE80211_MODE_11NA; 812 break; 813 case IFM_IEEE80211_11NG: 814 newphymode = IEEE80211_MODE_11NG; 815 break; 816 case IFM_AUTO: 817 newphymode = IEEE80211_MODE_AUTO; 818 break; 819 default: 820 return EINVAL; 821 } 822 /* 823 * Turbo mode is an ``option''. 824 * XXX does not apply to AUTO 825 */ 826 if (ime->ifm_media & IFM_IEEE80211_TURBO) { 827 if (newphymode == IEEE80211_MODE_11A) { 828 if (ic->ic_flags & IEEE80211_F_TURBOP) 829 newphymode = IEEE80211_MODE_TURBO_A; 830 else 831 newphymode = IEEE80211_MODE_STURBO_A; 832 } else if (newphymode == IEEE80211_MODE_11G) 833 newphymode = IEEE80211_MODE_TURBO_G; 834 else 835 return EINVAL; 836 } 837 /* XXX HT40 +/- */ 838 /* 839 * Next, the fixed/variable rate. 840 */ 841 newrate = ic->ic_fixed_rate; 842 if (IFM_SUBTYPE(ime->ifm_media) != IFM_AUTO) { 843 /* 844 * Convert media subtype to rate. 845 */ 846 newrate = ieee80211_media2rate(ime->ifm_media); 847 if (newrate == 0 || !checkrate(ic, newphymode, newrate)) 848 return EINVAL; 849 } else 850 newrate = IEEE80211_FIXED_RATE_NONE; 851 852 /* 853 * Deduce new operating mode but don't install it just yet. 854 */ 855 if ((ime->ifm_media & (IFM_IEEE80211_ADHOC|IFM_FLAG0)) == 856 (IFM_IEEE80211_ADHOC|IFM_FLAG0)) 857 newopmode = IEEE80211_M_AHDEMO; 858 else if (ime->ifm_media & IFM_IEEE80211_HOSTAP) 859 newopmode = IEEE80211_M_HOSTAP; 860 else if (ime->ifm_media & IFM_IEEE80211_ADHOC) 861 newopmode = IEEE80211_M_IBSS; 862 else if (ime->ifm_media & IFM_IEEE80211_MONITOR) 863 newopmode = IEEE80211_M_MONITOR; 864 else 865 newopmode = IEEE80211_M_STA; 866 867 /* 868 * Handle phy mode change. 869 */ 870 if (ic->ic_des_mode != newphymode) { /* change phy mode */ 871 ic->ic_des_mode = newphymode; 872 error = ENETRESET; 873 } 874 875 /* 876 * Committed to changes, install the rate setting. 877 */ 878 if (ic->ic_fixed_rate != newrate) { 879 ic->ic_fixed_rate = newrate; /* set fixed tx rate */ 880 error = ENETRESET; 881 } 882 883 /* 884 * Handle operating mode change. 885 */ 886 if (ic->ic_opmode != newopmode) { 887 ic->ic_opmode = newopmode; 888 switch (newopmode) { 889 case IEEE80211_M_AHDEMO: 890 case IEEE80211_M_HOSTAP: 891 case IEEE80211_M_STA: 892 case IEEE80211_M_MONITOR: 893 case IEEE80211_M_WDS: 894 ic->ic_flags &= ~IEEE80211_F_IBSSON; 895 break; 896 case IEEE80211_M_IBSS: 897 ic->ic_flags |= IEEE80211_F_IBSSON; 898 break; 899 } 900 /* 901 * Yech, slot time may change depending on the 902 * operating mode so reset it to be sure everything 903 * is setup appropriately. 904 */ 905 ieee80211_reset_erp(ic); 906 ieee80211_wme_initparams(ic); /* after opmode change */ 907 error = ENETRESET; 908 } 909#ifdef notdef 910 if (error == 0) 911 ifp->if_baudrate = ifmedia_baudrate(ime->ifm_media); 912#endif 913 return error; 914} 915 916/* 917 * Common code to calculate the media status word 918 * from the operating mode and channel state. 919 */ 920static int 921media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan) 922{ 923 int status; 924 925 status = IFM_IEEE80211; 926 switch (opmode) { 927 case IEEE80211_M_STA: 928 break; 929 case IEEE80211_M_IBSS: 930 status |= IFM_IEEE80211_ADHOC; 931 break; 932 case IEEE80211_M_HOSTAP: 933 status |= IFM_IEEE80211_HOSTAP; 934 break; 935 case IEEE80211_M_MONITOR: 936 status |= IFM_IEEE80211_MONITOR; 937 break; 938 case IEEE80211_M_AHDEMO: 939 status |= IFM_IEEE80211_ADHOC | IFM_FLAG0; 940 break; 941 case IEEE80211_M_WDS: 942 /* should not come here */ 943 break; 944 } 945 if (IEEE80211_IS_CHAN_HTA(chan)) { 946 status |= IFM_IEEE80211_11NA; 947 } else if (IEEE80211_IS_CHAN_HTG(chan)) { 948 status |= IFM_IEEE80211_11NG; 949 } else if (IEEE80211_IS_CHAN_A(chan)) { 950 status |= IFM_IEEE80211_11A; 951 } else if (IEEE80211_IS_CHAN_B(chan)) { 952 status |= IFM_IEEE80211_11B; 953 } else if (IEEE80211_IS_CHAN_ANYG(chan)) { 954 status |= IFM_IEEE80211_11G; 955 } else if (IEEE80211_IS_CHAN_FHSS(chan)) { 956 status |= IFM_IEEE80211_FH; 957 } 958 /* XXX else complain? */ 959 960 if (IEEE80211_IS_CHAN_TURBO(chan)) 961 status |= IFM_IEEE80211_TURBO; 962 963 return status; 964} 965 966void 967ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr) 968{ 969 struct ieee80211com *ic; 970 enum ieee80211_phymode mode; 971 const struct ieee80211_rateset *rs; 972 973 ic = ieee80211_find_instance(ifp); 974 if (!ic) { 975 if_printf(ifp, "%s: no 802.11 instance!\n", __func__); 976 return; 977 } 978 imr->ifm_status = IFM_AVALID; 979 /* 980 * NB: use the current channel's mode to lock down a xmit 981 * rate only when running; otherwise we may have a mismatch 982 * in which case the rate will not be convertible. 983 */ 984 if (ic->ic_state == IEEE80211_S_RUN) { 985 imr->ifm_status |= IFM_ACTIVE; 986 mode = ieee80211_chan2mode(ic->ic_curchan); 987 } else 988 mode = IEEE80211_MODE_AUTO; 989 imr->ifm_active = media_status(ic->ic_opmode, ic->ic_curchan); 990 /* 991 * Calculate a current rate if possible. 992 */ 993 if (ic->ic_fixed_rate != IEEE80211_FIXED_RATE_NONE) { 994 /* 995 * A fixed rate is set, report that. 996 */ 997 imr->ifm_active |= ieee80211_rate2media(ic, 998 ic->ic_fixed_rate, mode); 999 } else if (ic->ic_opmode == IEEE80211_M_STA) { 1000 /* 1001 * In station mode report the current transmit rate. 1002 * XXX HT rate 1003 */ 1004 rs = &ic->ic_bss->ni_rates; 1005 imr->ifm_active |= ieee80211_rate2media(ic, 1006 rs->rs_rates[ic->ic_bss->ni_txrate], mode); 1007 } else 1008 imr->ifm_active |= IFM_AUTO; 1009} 1010 1011/* 1012 * Set the current phy mode and recalculate the active channel 1013 * set based on the available channels for this mode. Also 1014 * select a new default/current channel if the current one is 1015 * inappropriate for this mode. 1016 */ 1017int 1018ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode) 1019{ 1020 /* 1021 * Adjust basic rates in 11b/11g supported rate set. 1022 * Note that if operating on a hal/quarter rate channel 1023 * this is a noop as those rates sets are different 1024 * and used instead. 1025 */ 1026 if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B) 1027 ieee80211_set11gbasicrates(&ic->ic_sup_rates[mode], mode); 1028 1029 ic->ic_curmode = mode; 1030 ieee80211_reset_erp(ic); /* reset ERP state */ 1031 ieee80211_wme_initparams(ic); /* reset WME stat */ 1032 1033 return 0; 1034} 1035 1036/* 1037 * Return the phy mode for with the specified channel. 1038 */ 1039enum ieee80211_phymode 1040ieee80211_chan2mode(const struct ieee80211_channel *chan) 1041{ 1042 1043 if (IEEE80211_IS_CHAN_HTA(chan)) 1044 return IEEE80211_MODE_11NA; 1045 else if (IEEE80211_IS_CHAN_HTG(chan)) 1046 return IEEE80211_MODE_11NG; 1047 else if (IEEE80211_IS_CHAN_108G(chan)) 1048 return IEEE80211_MODE_TURBO_G; 1049 else if (IEEE80211_IS_CHAN_ST(chan)) 1050 return IEEE80211_MODE_STURBO_A; 1051 else if (IEEE80211_IS_CHAN_TURBO(chan)) 1052 return IEEE80211_MODE_TURBO_A; 1053 else if (IEEE80211_IS_CHAN_A(chan)) 1054 return IEEE80211_MODE_11A; 1055 else if (IEEE80211_IS_CHAN_ANYG(chan)) 1056 return IEEE80211_MODE_11G; 1057 else if (IEEE80211_IS_CHAN_B(chan)) 1058 return IEEE80211_MODE_11B; 1059 else if (IEEE80211_IS_CHAN_FHSS(chan)) 1060 return IEEE80211_MODE_FH; 1061 1062 /* NB: should not get here */ 1063 printf("%s: cannot map channel to mode; freq %u flags 0x%x\n", 1064 __func__, chan->ic_freq, chan->ic_flags); 1065 return IEEE80211_MODE_11B; 1066} 1067 1068struct ratemedia { 1069 u_int match; /* rate + mode */ 1070 u_int media; /* if_media rate */ 1071}; 1072 1073static int 1074findmedia(const struct ratemedia rates[], int n, u_int match) 1075{ 1076 int i; 1077 1078 for (i = 0; i < n; i++) 1079 if (rates[i].match == match) 1080 return rates[i].media; 1081 return IFM_AUTO; 1082} 1083 1084/* 1085 * Convert IEEE80211 rate value to ifmedia subtype. 1086 * Rate is either a legacy rate in units of 0.5Mbps 1087 * or an MCS index. 1088 */ 1089int 1090ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode) 1091{ 1092#define N(a) (sizeof(a) / sizeof(a[0])) 1093 static const struct ratemedia rates[] = { 1094 { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 }, 1095 { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 }, 1096 { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 }, 1097 { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 }, 1098 { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 }, 1099 { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 }, 1100 { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 }, 1101 { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 }, 1102 { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 }, 1103 { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 }, 1104 { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 }, 1105 { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 }, 1106 { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 }, 1107 { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 }, 1108 { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 }, 1109 { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 }, 1110 { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 }, 1111 { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 }, 1112 { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 }, 1113 { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 }, 1114 { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 }, 1115 { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 }, 1116 { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 }, 1117 { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 }, 1118 { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 }, 1119 { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 }, 1120 { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 }, 1121 { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 }, 1122 { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 }, 1123 { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 }, 1124 /* NB: OFDM72 doesn't realy exist so we don't handle it */ 1125 }; 1126 static const struct ratemedia htrates[] = { 1127 { 0, IFM_IEEE80211_MCS }, 1128 { 1, IFM_IEEE80211_MCS }, 1129 { 2, IFM_IEEE80211_MCS }, 1130 { 3, IFM_IEEE80211_MCS }, 1131 { 4, IFM_IEEE80211_MCS }, 1132 { 5, IFM_IEEE80211_MCS }, 1133 { 6, IFM_IEEE80211_MCS }, 1134 { 7, IFM_IEEE80211_MCS }, 1135 { 8, IFM_IEEE80211_MCS }, 1136 { 9, IFM_IEEE80211_MCS }, 1137 { 10, IFM_IEEE80211_MCS }, 1138 { 11, IFM_IEEE80211_MCS }, 1139 { 12, IFM_IEEE80211_MCS }, 1140 { 13, IFM_IEEE80211_MCS }, 1141 { 14, IFM_IEEE80211_MCS }, 1142 { 15, IFM_IEEE80211_MCS }, 1143 }; 1144 int m; 1145 1146 /* 1147 * Check 11n rates first for match as an MCS. 1148 */ 1149 if (mode == IEEE80211_MODE_11NA) { 1150 if (rate & IEEE80211_RATE_MCS) { 1151 rate &= ~IEEE80211_RATE_MCS; 1152 m = findmedia(htrates, N(htrates), rate); 1153 if (m != IFM_AUTO) 1154 return m | IFM_IEEE80211_11NA; 1155 } 1156 } else if (mode == IEEE80211_MODE_11NG) { 1157 /* NB: 12 is ambiguous, it will be treated as an MCS */ 1158 if (rate & IEEE80211_RATE_MCS) { 1159 rate &= ~IEEE80211_RATE_MCS; 1160 m = findmedia(htrates, N(htrates), rate); 1161 if (m != IFM_AUTO) 1162 return m | IFM_IEEE80211_11NG; 1163 } 1164 } 1165 rate &= IEEE80211_RATE_VAL; 1166 switch (mode) { 1167 case IEEE80211_MODE_11A: 1168 case IEEE80211_MODE_11NA: 1169 case IEEE80211_MODE_TURBO_A: 1170 case IEEE80211_MODE_STURBO_A: 1171 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11A); 1172 case IEEE80211_MODE_11B: 1173 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11B); 1174 case IEEE80211_MODE_FH: 1175 return findmedia(rates, N(rates), rate | IFM_IEEE80211_FH); 1176 case IEEE80211_MODE_AUTO: 1177 /* NB: ic may be NULL for some drivers */ 1178 if (ic && ic->ic_phytype == IEEE80211_T_FH) 1179 return findmedia(rates, N(rates), 1180 rate | IFM_IEEE80211_FH); 1181 /* NB: hack, 11g matches both 11b+11a rates */ 1182 /* fall thru... */ 1183 case IEEE80211_MODE_11G: 1184 case IEEE80211_MODE_11NG: 1185 case IEEE80211_MODE_TURBO_G: 1186 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11G); 1187 } 1188 return IFM_AUTO; 1189#undef N 1190} 1191 1192int 1193ieee80211_media2rate(int mword) 1194{ 1195#define N(a) (sizeof(a) / sizeof(a[0])) 1196 static const int ieeerates[] = { 1197 -1, /* IFM_AUTO */ 1198 0, /* IFM_MANUAL */ 1199 0, /* IFM_NONE */ 1200 2, /* IFM_IEEE80211_FH1 */ 1201 4, /* IFM_IEEE80211_FH2 */ 1202 2, /* IFM_IEEE80211_DS1 */ 1203 4, /* IFM_IEEE80211_DS2 */ 1204 11, /* IFM_IEEE80211_DS5 */ 1205 22, /* IFM_IEEE80211_DS11 */ 1206 44, /* IFM_IEEE80211_DS22 */ 1207 12, /* IFM_IEEE80211_OFDM6 */ 1208 18, /* IFM_IEEE80211_OFDM9 */ 1209 24, /* IFM_IEEE80211_OFDM12 */ 1210 36, /* IFM_IEEE80211_OFDM18 */ 1211 48, /* IFM_IEEE80211_OFDM24 */ 1212 72, /* IFM_IEEE80211_OFDM36 */ 1213 96, /* IFM_IEEE80211_OFDM48 */ 1214 108, /* IFM_IEEE80211_OFDM54 */ 1215 144, /* IFM_IEEE80211_OFDM72 */ 1216 0, /* IFM_IEEE80211_DS354k */ 1217 0, /* IFM_IEEE80211_DS512k */ 1218 6, /* IFM_IEEE80211_OFDM3 */ 1219 9, /* IFM_IEEE80211_OFDM4 */ 1220 54, /* IFM_IEEE80211_OFDM27 */ 1221 -1, /* IFM_IEEE80211_MCS */ 1222 }; 1223 return IFM_SUBTYPE(mword) < N(ieeerates) ? 1224 ieeerates[IFM_SUBTYPE(mword)] : 0; 1225#undef N 1226} 1227