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("$FreeBSD$"); 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 48 const 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) 65 static const struct ieee80211_rateset ieee80211_rateset_11a = 66 { 8, { B(12), 18, B(24), 36, B(48), 72, 96, 108 } }; 67 static const struct ieee80211_rateset ieee80211_rateset_half = 68 { 8, { B(6), 9, B(12), 18, B(24), 36, 48, 54 } }; 69 static const struct ieee80211_rateset ieee80211_rateset_quarter = 70 { 8, { B(3), 4, B(6), 9, B(12), 18, 24, 27 } }; 71 static 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 */ 74 static 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 78 static int media_status(enum ieee80211_opmode , 79 const struct ieee80211_channel *); 80 81 /* list of all instances */ 82 SLIST_HEAD(ieee80211_list, ieee80211com); 83 static struct ieee80211_list ieee80211_list = 84 SLIST_HEAD_INITIALIZER(ieee80211_list); 85 static uint8_t ieee80211_vapmap[32]; /* enough for 256 */ 86 static struct mtx ieee80211_vap_mtx; 87 MTX_SYSINIT(ieee80211, &ieee80211_vap_mtx, "net80211 instances", MTX_DEF); 88 89 static void 90 ieee80211_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 } 109 110 static void 111 ieee80211_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 */ 132 static int 133 ieee80211_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 */ 143 static void 144 ieee80211_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 } 208 209 void 210 ieee80211_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 } 281 282 void 283 ieee80211_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 } 305 306 static __inline int 307 mapgsm(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 } 319 320 static __inline int 321 mappsb(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 */ 329 int 330 ieee80211_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 */ 374 int 375 ieee80211_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 */ 387 u_int 388 ieee80211_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 */ 422 struct ieee80211_channel * 423 ieee80211_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 static void 444 addmedia(struct ieee80211com *ic, int mode, int mword) 445 { 446 #define TURBO(m) ((m) | IFM_IEEE80211_TURBO) 447 #define ADD(_ic, _s, _o) \ 448 ifmedia_add(&(_ic)->ic_media, \ 449 IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL) 450 static const u_int mopts[IEEE80211_MODE_MAX] = { 451 IFM_AUTO, /* IEEE80211_MODE_AUTO */ 452 IFM_IEEE80211_11A, /* IEEE80211_MODE_11A */ 453 IFM_IEEE80211_11B, /* IEEE80211_MODE_11B */ 454 IFM_IEEE80211_11G, /* IEEE80211_MODE_11G */ 455 IFM_IEEE80211_FH, /* IEEE80211_MODE_FH */ 456 TURBO(IFM_IEEE80211_11A), /* IEEE80211_MODE_TURBO_A */ 457 TURBO(IFM_IEEE80211_11G), /* IEEE80211_MODE_TURBO_G */ 458 TURBO(IFM_IEEE80211_11A), /* IEEE80211_MODE_STURBO_A */ 459 IFM_IEEE80211_11NA, /* IEEE80211_MODE_11NA */ 460 IFM_IEEE80211_11NG, /* IEEE80211_MODE_11NG */ 461 }; 462 u_int mopt; 463 464 KASSERT(mode < IEEE80211_MODE_MAX, ("bad mode %u", mode)); 465 mopt = mopts[mode]; 466 KASSERT(mopt != 0 || mode == IEEE80211_MODE_AUTO, 467 ("no media mapping for mode %u", mode)); 468 469 ADD(ic, mword, mopt); /* e.g. 11a auto */ 470 if (ic->ic_caps & IEEE80211_C_IBSS) 471 ADD(ic, mword, mopt | IFM_IEEE80211_ADHOC); 472 if (ic->ic_caps & IEEE80211_C_HOSTAP) 473 ADD(ic, mword, mopt | IFM_IEEE80211_HOSTAP); 474 if (ic->ic_caps & IEEE80211_C_AHDEMO) 475 ADD(ic, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0); 476 if (ic->ic_caps & IEEE80211_C_MONITOR) 477 ADD(ic, mword, mopt | IFM_IEEE80211_MONITOR); 478 #undef ADD 479 #undef TURBO 480 } 481 482 /* 483 * Setup the media data structures according to the channel and 484 * rate tables. This must be called by the driver after 485 * ieee80211_attach and before most anything else. 486 */ 487 void 488 ieee80211_media_init(struct ieee80211com *ic, 489 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) 490 { 491 struct ifnet *ifp = ic->ic_ifp; 492 int i, j, mode, rate, maxrate, mword, r; 493 const struct ieee80211_rateset *rs; 494 struct ieee80211_rateset allrates; 495 496 /* NB: this works because the structure is initialized to zero */ 497 if (LIST_EMPTY(&ic->ic_media.ifm_list)) { 498 /* 499 * Do late attach work that must wait for any subclass 500 * (i.e. driver) work such as overriding methods. 501 */ 502 ieee80211_node_lateattach(ic); 503 } else { 504 /* 505 * We are re-initializing the channel list; clear 506 * the existing media state as the media routines 507 * don't suppress duplicates. 508 */ 509 ifmedia_removeall(&ic->ic_media); 510 ieee80211_chan_init(ic); 511 } 512 ieee80211_power_lateattach(ic); 513 514 /* 515 * Fill in media characteristics. 516 */ 517 ifmedia_init(&ic->ic_media, 0, media_change, media_stat); 518 maxrate = 0; 519 /* 520 * Add media for legacy operating modes. 521 */ 522 memset(&allrates, 0, sizeof(allrates)); 523 for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) { 524 if (isclr(ic->ic_modecaps, mode)) 525 continue; 526 addmedia(ic, mode, IFM_AUTO); 527 if (mode == IEEE80211_MODE_AUTO) 528 continue; 529 rs = &ic->ic_sup_rates[mode]; 530 for (i = 0; i < rs->rs_nrates; i++) { 531 rate = rs->rs_rates[i]; 532 mword = ieee80211_rate2media(ic, rate, mode); 533 if (mword == 0) 534 continue; 535 addmedia(ic, mode, mword); 536 /* 537 * Add legacy rate to the collection of all rates. 538 */ 539 r = rate & IEEE80211_RATE_VAL; 540 for (j = 0; j < allrates.rs_nrates; j++) 541 if (allrates.rs_rates[j] == r) 542 break; 543 if (j == allrates.rs_nrates) { 544 /* unique, add to the set */ 545 allrates.rs_rates[j] = r; 546 allrates.rs_nrates++; 547 } 548 rate = (rate & IEEE80211_RATE_VAL) / 2; 549 if (rate > maxrate) 550 maxrate = rate; 551 } 552 } 553 for (i = 0; i < allrates.rs_nrates; i++) { 554 mword = ieee80211_rate2media(ic, allrates.rs_rates[i], 555 IEEE80211_MODE_AUTO); 556 if (mword == 0) 557 continue; 558 /* NB: remove media options from mword */ 559 addmedia(ic, IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword)); 560 } 561 /* 562 * Add HT/11n media. Note that we do not have enough 563 * bits in the media subtype to express the MCS so we 564 * use a "placeholder" media subtype and any fixed MCS 565 * must be specified with a different mechanism. 566 */ 567 for (; mode < IEEE80211_MODE_MAX; mode++) { 568 if (isclr(ic->ic_modecaps, mode)) 569 continue; 570 addmedia(ic, mode, IFM_AUTO); 571 addmedia(ic, mode, IFM_IEEE80211_MCS); 572 } 573 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) || 574 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) { 575 addmedia(ic, IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS); 576 /* XXX could walk htrates */ 577 /* XXX known array size */ 578 if (ieee80211_htrates[15] > maxrate) 579 maxrate = ieee80211_htrates[15]; 580 } 581 582 /* NB: strip explicit mode; we're actually in autoselect */ 583 ifmedia_set(&ic->ic_media, 584 media_status(ic->ic_opmode, ic->ic_curchan) &~ IFM_MMASK); 585 586 if (maxrate) 587 ifp->if_baudrate = IF_Mbps(maxrate); 588 } 589 590 const struct ieee80211_rateset * 591 ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c) 592 { 593 if (IEEE80211_IS_CHAN_HALF(c)) 594 return &ieee80211_rateset_half; 595 if (IEEE80211_IS_CHAN_QUARTER(c)) 596 return &ieee80211_rateset_quarter; 597 if (IEEE80211_IS_CHAN_HTA(c)) 598 return &ic->ic_sup_rates[IEEE80211_MODE_11A]; 599 if (IEEE80211_IS_CHAN_HTG(c)) { 600 /* XXX does this work for basic rates? */ 601 return &ic->ic_sup_rates[IEEE80211_MODE_11G]; 602 } 603 return &ic->ic_sup_rates[ieee80211_chan2mode(c)]; 604 } 605 606 void 607 ieee80211_announce(struct ieee80211com *ic) 608 { 609 struct ifnet *ifp = ic->ic_ifp; 610 int i, mode, rate, mword; 611 const struct ieee80211_rateset *rs; 612 613 /* NB: skip AUTO since it has no rates */ 614 for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) { 615 if (isclr(ic->ic_modecaps, mode)) 616 continue; 617 if_printf(ifp, "%s rates: ", ieee80211_phymode_name[mode]); 618 rs = &ic->ic_sup_rates[mode]; 619 for (i = 0; i < rs->rs_nrates; i++) { 620 mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode); 621 if (mword == 0) 622 continue; 623 rate = ieee80211_media2rate(mword); 624 printf("%s%d%sMbps", (i != 0 ? " " : ""), 625 rate / 2, ((rate & 0x1) != 0 ? ".5" : "")); 626 } 627 printf("\n"); 628 } 629 ieee80211_ht_announce(ic); 630 } 631 632 void 633 ieee80211_announce_channels(struct ieee80211com *ic) 634 { 635 const struct ieee80211_channel *c; 636 char type; 637 int i, cw; 638 639 printf("Chan Freq CW RegPwr MinPwr MaxPwr\n"); 640 for (i = 0; i < ic->ic_nchans; i++) { 641 c = &ic->ic_channels[i]; 642 if (IEEE80211_IS_CHAN_ST(c)) 643 type = 'S'; 644 else if (IEEE80211_IS_CHAN_108A(c)) 645 type = 'T'; 646 else if (IEEE80211_IS_CHAN_108G(c)) 647 type = 'G'; 648 else if (IEEE80211_IS_CHAN_HT(c)) 649 type = 'n'; 650 else if (IEEE80211_IS_CHAN_A(c)) 651 type = 'a'; 652 else if (IEEE80211_IS_CHAN_ANYG(c)) 653 type = 'g'; 654 else if (IEEE80211_IS_CHAN_B(c)) 655 type = 'b'; 656 else 657 type = 'f'; 658 if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c)) 659 cw = 40; 660 else if (IEEE80211_IS_CHAN_HALF(c)) 661 cw = 10; 662 else if (IEEE80211_IS_CHAN_QUARTER(c)) 663 cw = 5; 664 else 665 cw = 20; 666 printf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n" 667 , c->ic_ieee, c->ic_freq, type 668 , cw 669 , IEEE80211_IS_CHAN_HT40U(c) ? '+' : 670 IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' ' 671 , c->ic_maxregpower 672 , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0 673 , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0 674 ); 675 } 676 } 677 678 /* 679 * Find an instance by it's mac address. 680 */ 681 struct ieee80211com * 682 ieee80211_find_vap(const uint8_t mac[IEEE80211_ADDR_LEN]) 683 { 684 struct ieee80211com *ic; 685 686 /* XXX lock */ 687 SLIST_FOREACH(ic, &ieee80211_list, ic_next) 688 if (IEEE80211_ADDR_EQ(mac, ic->ic_myaddr)) 689 return ic; 690 return NULL; 691 } 692 693 static struct ieee80211com * 694 ieee80211_find_instance(struct ifnet *ifp) 695 { 696 struct ieee80211com *ic; 697 698 /* XXX lock */ 699 /* XXX not right for multiple instances but works for now */ 700 SLIST_FOREACH(ic, &ieee80211_list, ic_next) 701 if (ic->ic_ifp == ifp) 702 return ic; 703 return NULL; 704 } 705 706 static int 707 findrate(struct ieee80211com *ic, enum ieee80211_phymode mode, int rate) 708 { 709 #define IEEERATE(_ic,_m,_i) \ 710 ((_ic)->ic_sup_rates[_m].rs_rates[_i] & IEEE80211_RATE_VAL) 711 int i, nrates = ic->ic_sup_rates[mode].rs_nrates; 712 for (i = 0; i < nrates; i++) 713 if (IEEERATE(ic, mode, i) == rate) 714 return i; 715 return -1; 716 #undef IEEERATE 717 } 718 719 /* 720 * Convert a media specification to a rate index and possibly a mode 721 * (if the rate is fixed and the mode is specified as ``auto'' then 722 * we need to lock down the mode so the index is meanginful). 723 */ 724 static int 725 checkrate(struct ieee80211com *ic, enum ieee80211_phymode mode, int rate) 726 { 727 728 /* 729 * Check the rate table for the specified/current phy. 730 */ 731 if (mode == IEEE80211_MODE_AUTO) { 732 int i; 733 /* 734 * In autoselect mode search for the rate. 735 */ 736 for (i = IEEE80211_MODE_11A; i < IEEE80211_MODE_MAX; i++) { 737 if (isset(ic->ic_modecaps, i) && 738 findrate(ic, i, rate) != -1) 739 return 1; 740 } 741 return 0; 742 } else { 743 /* 744 * Mode is fixed, check for rate. 745 */ 746 return (findrate(ic, mode, rate) != -1); 747 } 748 } 749 750 /* 751 * Handle a media change request. 752 */ 753 int 754 ieee80211_media_change(struct ifnet *ifp) 755 { 756 struct ieee80211com *ic; 757 struct ifmedia_entry *ime; 758 enum ieee80211_opmode newopmode; 759 enum ieee80211_phymode newphymode; 760 int newrate, error = 0; 761 762 ic = ieee80211_find_instance(ifp); 763 if (!ic) { 764 if_printf(ifp, "%s: no 802.11 instance!\n", __func__); 765 return EINVAL; 766 } 767 ime = ic->ic_media.ifm_cur; 768 /* 769 * First, identify the phy mode. 770 */ 771 switch (IFM_MODE(ime->ifm_media)) { 772 case IFM_IEEE80211_11A: 773 newphymode = IEEE80211_MODE_11A; 774 break; 775 case IFM_IEEE80211_11B: 776 newphymode = IEEE80211_MODE_11B; 777 break; 778 case IFM_IEEE80211_11G: 779 newphymode = IEEE80211_MODE_11G; 780 break; 781 case IFM_IEEE80211_FH: 782 newphymode = IEEE80211_MODE_FH; 783 break; 784 case IFM_IEEE80211_11NA: 785 newphymode = IEEE80211_MODE_11NA; 786 break; 787 case IFM_IEEE80211_11NG: 788 newphymode = IEEE80211_MODE_11NG; 789 break; 790 case IFM_AUTO: 791 newphymode = IEEE80211_MODE_AUTO; 792 break; 793 default: 794 return EINVAL; 795 } 796 /* 797 * Turbo mode is an ``option''. 798 * XXX does not apply to AUTO 799 */ 800 if (ime->ifm_media & IFM_IEEE80211_TURBO) { 801 if (newphymode == IEEE80211_MODE_11A) { 802 if (ic->ic_flags & IEEE80211_F_TURBOP) 803 newphymode = IEEE80211_MODE_TURBO_A; 804 else 805 newphymode = IEEE80211_MODE_STURBO_A; 806 } else if (newphymode == IEEE80211_MODE_11G) 807 newphymode = IEEE80211_MODE_TURBO_G; 808 else 809 return EINVAL; 810 } 811 /* XXX HT40 +/- */ 812 /* 813 * Next, the fixed/variable rate. 814 */ 815 newrate = ic->ic_fixed_rate; 816 if (IFM_SUBTYPE(ime->ifm_media) != IFM_AUTO) { 817 /* 818 * Convert media subtype to rate. 819 */ 820 newrate = ieee80211_media2rate(ime->ifm_media); 821 if (newrate == 0 || !checkrate(ic, newphymode, newrate)) 822 return EINVAL; 823 } else 824 newrate = IEEE80211_FIXED_RATE_NONE; 825 826 /* 827 * Deduce new operating mode but don't install it just yet. 828 */ 829 if ((ime->ifm_media & (IFM_IEEE80211_ADHOC|IFM_FLAG0)) == 830 (IFM_IEEE80211_ADHOC|IFM_FLAG0)) 831 newopmode = IEEE80211_M_AHDEMO; 832 else if (ime->ifm_media & IFM_IEEE80211_HOSTAP) 833 newopmode = IEEE80211_M_HOSTAP; 834 else if (ime->ifm_media & IFM_IEEE80211_ADHOC) 835 newopmode = IEEE80211_M_IBSS; 836 else if (ime->ifm_media & IFM_IEEE80211_MONITOR) 837 newopmode = IEEE80211_M_MONITOR; 838 else 839 newopmode = IEEE80211_M_STA; 840 841 /* 842 * Handle phy mode change. 843 */ 844 if (ic->ic_des_mode != newphymode) { /* change phy mode */ 845 ic->ic_des_mode = newphymode; 846 error = ENETRESET; 847 } 848 849 /* 850 * Committed to changes, install the rate setting. 851 */ 852 if (ic->ic_fixed_rate != newrate) { 853 ic->ic_fixed_rate = newrate; /* set fixed tx rate */ 854 error = ENETRESET; 855 } 856 857 /* 858 * Handle operating mode change. 859 */ 860 if (ic->ic_opmode != newopmode) { 861 ic->ic_opmode = newopmode; 862 switch (newopmode) { 863 case IEEE80211_M_AHDEMO: 864 case IEEE80211_M_HOSTAP: 865 case IEEE80211_M_STA: 866 case IEEE80211_M_MONITOR: 867 case IEEE80211_M_WDS: 868 ic->ic_flags &= ~IEEE80211_F_IBSSON; 869 break; 870 case IEEE80211_M_IBSS: 871 ic->ic_flags |= IEEE80211_F_IBSSON; 872 break; 873 } 874 /* 875 * Yech, slot time may change depending on the 876 * operating mode so reset it to be sure everything 877 * is setup appropriately. 878 */ 879 ieee80211_reset_erp(ic); 880 ieee80211_wme_initparams(ic); /* after opmode change */ 881 error = ENETRESET; 882 } 883 #ifdef notdef 884 if (error == 0) 885 ifp->if_baudrate = ifmedia_baudrate(ime->ifm_media); 886 #endif 887 return error; 888 } 889 890 /* 891 * Common code to calculate the media status word 892 * from the operating mode and channel state. 893 */ 894 static int 895 media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan) 896 { 897 int status; 898 899 status = IFM_IEEE80211; 900 switch (opmode) { 901 case IEEE80211_M_STA: 902 break; 903 case IEEE80211_M_IBSS: 904 status |= IFM_IEEE80211_ADHOC; 905 break; 906 case IEEE80211_M_HOSTAP: 907 status |= IFM_IEEE80211_HOSTAP; 908 break; 909 case IEEE80211_M_MONITOR: 910 status |= IFM_IEEE80211_MONITOR; 911 break; 912 case IEEE80211_M_AHDEMO: 913 status |= IFM_IEEE80211_ADHOC | IFM_FLAG0; 914 break; 915 case IEEE80211_M_WDS: 916 /* should not come here */ 917 break; 918 } 919 if (IEEE80211_IS_CHAN_HTA(chan)) { 920 status |= IFM_IEEE80211_11NA; 921 } else if (IEEE80211_IS_CHAN_HTG(chan)) { 922 status |= IFM_IEEE80211_11NG; 923 } else if (IEEE80211_IS_CHAN_A(chan)) { 924 status |= IFM_IEEE80211_11A; 925 } else if (IEEE80211_IS_CHAN_B(chan)) { 926 status |= IFM_IEEE80211_11B; 927 } else if (IEEE80211_IS_CHAN_ANYG(chan)) { 928 status |= IFM_IEEE80211_11G; 929 } else if (IEEE80211_IS_CHAN_FHSS(chan)) { 930 status |= IFM_IEEE80211_FH; 931 } 932 /* XXX else complain? */ 933 934 if (IEEE80211_IS_CHAN_TURBO(chan)) 935 status |= IFM_IEEE80211_TURBO; 936 937 return status; 938 } 939 940 void 941 ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr) 942 { 943 struct ieee80211com *ic; 944 enum ieee80211_phymode mode; 945 const struct ieee80211_rateset *rs; 946 947 ic = ieee80211_find_instance(ifp); 948 if (!ic) { 949 if_printf(ifp, "%s: no 802.11 instance!\n", __func__); 950 return; 951 } 952 imr->ifm_status = IFM_AVALID; 953 /* 954 * NB: use the current channel's mode to lock down a xmit 955 * rate only when running; otherwise we may have a mismatch 956 * in which case the rate will not be convertible. 957 */ 958 if (ic->ic_state == IEEE80211_S_RUN) { 959 imr->ifm_status |= IFM_ACTIVE; 960 mode = ieee80211_chan2mode(ic->ic_curchan); 961 } else 962 mode = IEEE80211_MODE_AUTO; 963 imr->ifm_active = media_status(ic->ic_opmode, ic->ic_curchan); 964 /* 965 * Calculate a current rate if possible. 966 */ 967 if (ic->ic_fixed_rate != IEEE80211_FIXED_RATE_NONE) { 968 /* 969 * A fixed rate is set, report that. 970 */ 971 imr->ifm_active |= ieee80211_rate2media(ic, 972 ic->ic_fixed_rate, mode); 973 } else if (ic->ic_opmode == IEEE80211_M_STA) { 974 /* 975 * In station mode report the current transmit rate. 976 * XXX HT rate 977 */ 978 rs = &ic->ic_bss->ni_rates; 979 imr->ifm_active |= ieee80211_rate2media(ic, 980 rs->rs_rates[ic->ic_bss->ni_txrate], mode); 981 } else 982 imr->ifm_active |= IFM_AUTO; 983 } 984 985 /* 986 * Set the current phy mode and recalculate the active channel 987 * set based on the available channels for this mode. Also 988 * select a new default/current channel if the current one is 989 * inappropriate for this mode. 990 */ 991 int 992 ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode) 993 { 994 /* 995 * Adjust basic rates in 11b/11g supported rate set. 996 * Note that if operating on a hal/quarter rate channel 997 * this is a noop as those rates sets are different 998 * and used instead. 999 */ 1000 if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B) 1001 ieee80211_set11gbasicrates(&ic->ic_sup_rates[mode], mode); 1002 1003 ic->ic_curmode = mode; 1004 ieee80211_reset_erp(ic); /* reset ERP state */ 1005 ieee80211_wme_initparams(ic); /* reset WME stat */ 1006 1007 return 0; 1008 } 1009 1010 /* 1011 * Return the phy mode for with the specified channel. 1012 */ 1013 enum ieee80211_phymode 1014 ieee80211_chan2mode(const struct ieee80211_channel *chan) 1015 { 1016 1017 if (IEEE80211_IS_CHAN_HTA(chan)) 1018 return IEEE80211_MODE_11NA; 1019 else if (IEEE80211_IS_CHAN_HTG(chan)) 1020 return IEEE80211_MODE_11NG; 1021 else if (IEEE80211_IS_CHAN_108G(chan)) 1022 return IEEE80211_MODE_TURBO_G; 1023 else if (IEEE80211_IS_CHAN_ST(chan)) 1024 return IEEE80211_MODE_STURBO_A; 1025 else if (IEEE80211_IS_CHAN_TURBO(chan)) 1026 return IEEE80211_MODE_TURBO_A; 1027 else if (IEEE80211_IS_CHAN_A(chan)) 1028 return IEEE80211_MODE_11A; 1029 else if (IEEE80211_IS_CHAN_ANYG(chan)) 1030 return IEEE80211_MODE_11G; 1031 else if (IEEE80211_IS_CHAN_B(chan)) 1032 return IEEE80211_MODE_11B; 1033 else if (IEEE80211_IS_CHAN_FHSS(chan)) 1034 return IEEE80211_MODE_FH; 1035 1036 /* NB: should not get here */ 1037 printf("%s: cannot map channel to mode; freq %u flags 0x%x\n", 1038 __func__, chan->ic_freq, chan->ic_flags); 1039 return IEEE80211_MODE_11B; 1040 } 1041 1042 struct ratemedia { 1043 u_int match; /* rate + mode */ 1044 u_int media; /* if_media rate */ 1045 }; 1046 1047 static int 1048 findmedia(const struct ratemedia rates[], int n, u_int match) 1049 { 1050 int i; 1051 1052 for (i = 0; i < n; i++) 1053 if (rates[i].match == match) 1054 return rates[i].media; 1055 return IFM_AUTO; 1056 } 1057 1058 /* 1059 * Convert IEEE80211 rate value to ifmedia subtype. 1060 * Rate is either a legacy rate in units of 0.5Mbps 1061 * or an MCS index. 1062 */ 1063 int 1064 ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode) 1065 { 1066 #define N(a) (sizeof(a) / sizeof(a[0])) 1067 static const struct ratemedia rates[] = { 1068 { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 }, 1069 { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 }, 1070 { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 }, 1071 { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 }, 1072 { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 }, 1073 { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 }, 1074 { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 }, 1075 { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 }, 1076 { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 }, 1077 { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 }, 1078 { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 }, 1079 { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 }, 1080 { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 }, 1081 { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 }, 1082 { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 }, 1083 { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 }, 1084 { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 }, 1085 { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 }, 1086 { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 }, 1087 { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 }, 1088 { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 }, 1089 { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 }, 1090 { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 }, 1091 { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 }, 1092 { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 }, 1093 { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 }, 1094 { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 }, 1095 { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 }, 1096 { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 }, 1097 { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 }, 1098 /* NB: OFDM72 doesn't realy exist so we don't handle it */ 1099 }; 1100 static const struct ratemedia htrates[] = { 1101 { 0, IFM_IEEE80211_MCS }, 1102 { 1, IFM_IEEE80211_MCS }, 1103 { 2, IFM_IEEE80211_MCS }, 1104 { 3, IFM_IEEE80211_MCS }, 1105 { 4, IFM_IEEE80211_MCS }, 1106 { 5, IFM_IEEE80211_MCS }, 1107 { 6, IFM_IEEE80211_MCS }, 1108 { 7, IFM_IEEE80211_MCS }, 1109 { 8, IFM_IEEE80211_MCS }, 1110 { 9, IFM_IEEE80211_MCS }, 1111 { 10, IFM_IEEE80211_MCS }, 1112 { 11, IFM_IEEE80211_MCS }, 1113 { 12, IFM_IEEE80211_MCS }, 1114 { 13, IFM_IEEE80211_MCS }, 1115 { 14, IFM_IEEE80211_MCS }, 1116 { 15, IFM_IEEE80211_MCS }, 1117 }; 1118 int m; 1119 1120 /* 1121 * Check 11n rates first for match as an MCS. 1122 */ 1123 if (mode == IEEE80211_MODE_11NA) { 1124 if (rate & IEEE80211_RATE_MCS) { 1125 rate &= ~IEEE80211_RATE_MCS; 1126 m = findmedia(htrates, N(htrates), rate); 1127 if (m != IFM_AUTO) 1128 return m | IFM_IEEE80211_11NA; 1129 } 1130 } else if (mode == IEEE80211_MODE_11NG) { 1131 /* NB: 12 is ambiguous, it will be treated as an MCS */ 1132 if (rate & IEEE80211_RATE_MCS) { 1133 rate &= ~IEEE80211_RATE_MCS; 1134 m = findmedia(htrates, N(htrates), rate); 1135 if (m != IFM_AUTO) 1136 return m | IFM_IEEE80211_11NG; 1137 } 1138 } 1139 rate &= IEEE80211_RATE_VAL; 1140 switch (mode) { 1141 case IEEE80211_MODE_11A: 1142 case IEEE80211_MODE_11NA: 1143 case IEEE80211_MODE_TURBO_A: 1144 case IEEE80211_MODE_STURBO_A: 1145 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11A); 1146 case IEEE80211_MODE_11B: 1147 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11B); 1148 case IEEE80211_MODE_FH: 1149 return findmedia(rates, N(rates), rate | IFM_IEEE80211_FH); 1150 case IEEE80211_MODE_AUTO: 1151 /* NB: ic may be NULL for some drivers */ 1152 if (ic && ic->ic_phytype == IEEE80211_T_FH) 1153 return findmedia(rates, N(rates), 1154 rate | IFM_IEEE80211_FH); 1155 /* NB: hack, 11g matches both 11b+11a rates */ 1156 /* fall thru... */ 1157 case IEEE80211_MODE_11G: 1158 case IEEE80211_MODE_11NG: 1159 case IEEE80211_MODE_TURBO_G: 1160 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11G); 1161 } 1162 return IFM_AUTO; 1163 #undef N 1164 } 1165 1166 int 1167 ieee80211_media2rate(int mword) 1168 { 1169 #define N(a) (sizeof(a) / sizeof(a[0])) 1170 static const int ieeerates[] = { 1171 -1, /* IFM_AUTO */ 1172 0, /* IFM_MANUAL */ 1173 0, /* IFM_NONE */ 1174 2, /* IFM_IEEE80211_FH1 */ 1175 4, /* IFM_IEEE80211_FH2 */ 1176 2, /* IFM_IEEE80211_DS1 */ 1177 4, /* IFM_IEEE80211_DS2 */ 1178 11, /* IFM_IEEE80211_DS5 */ 1179 22, /* IFM_IEEE80211_DS11 */ 1180 44, /* IFM_IEEE80211_DS22 */ 1181 12, /* IFM_IEEE80211_OFDM6 */ 1182 18, /* IFM_IEEE80211_OFDM9 */ 1183 24, /* IFM_IEEE80211_OFDM12 */ 1184 36, /* IFM_IEEE80211_OFDM18 */ 1185 48, /* IFM_IEEE80211_OFDM24 */ 1186 72, /* IFM_IEEE80211_OFDM36 */ 1187 96, /* IFM_IEEE80211_OFDM48 */ 1188 108, /* IFM_IEEE80211_OFDM54 */ 1189 144, /* IFM_IEEE80211_OFDM72 */ 1190 0, /* IFM_IEEE80211_DS354k */ 1191 0, /* IFM_IEEE80211_DS512k */ 1192 6, /* IFM_IEEE80211_OFDM3 */ 1193 9, /* IFM_IEEE80211_OFDM4 */ 1194 54, /* IFM_IEEE80211_OFDM27 */ 1195 -1, /* IFM_IEEE80211_MCS */ 1196 }; 1197 return IFM_SUBTYPE(mword) < N(ieeerates) ? 1198 ieeerates[IFM_SUBTYPE(mword)] : 0; 1199 #undef N 1200 } 1201