ieee80211.c revision 1.48.12.1
1 /* $NetBSD: ieee80211.c,v 1.48.12.1 2008/02/22 16:50:25 skrll Exp $ */ 2 /*- 3 * Copyright (c) 2001 Atsushi Onoe 4 * Copyright (c) 2002-2007 Sam Leffler, Errno Consulting 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 #ifdef __NetBSD__ 30 __KERNEL_RCSID(0, "$NetBSD: ieee80211.c,v 1.48.12.1 2008/02/22 16:50:25 skrll Exp $"); 31 #endif 32 #ifdef __FreeBSD__ 33 __FBSDID("$FreeBSD: src/sys/net80211/ieee80211.c,v 1.45 2007/12/07 01:46:12 kmacy Exp $"); 34 #endif 35 36 /* 37 * IEEE 802.11 generic handler 38 */ 39 40 #include "opt_inet.h" 41 #include "bpfilter.h" 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/kernel.h> 46 47 #include <sys/socket.h> 48 #include <sys/sockio.h> 49 #include <sys/endian.h> 50 #include <sys/errno.h> 51 #include <sys/proc.h> 52 #include <sys/sysctl.h> 53 54 #include <net/if.h> 55 #include <net/if_media.h> 56 #include <net/if_arp.h> 57 #include <net/if_ether.h> 58 #include <net/if_llc.h> 59 60 #include <net80211/ieee80211_netbsd.h> 61 #include <net80211/ieee80211_var.h> 62 #include <net80211/ieee80211_sysctl.h> 63 64 #include <net/bpf.h> 65 66 #ifdef INET 67 #include <netinet/in.h> 68 #include <net/if_ether.h> 69 #endif 70 71 const char *ieee80211_phymode_name[] = { 72 "auto", /* IEEE80211_MODE_AUTO */ 73 "11a", /* IEEE80211_MODE_11A */ 74 "11b", /* IEEE80211_MODE_11B */ 75 "11g", /* IEEE80211_MODE_11G */ 76 "FH", /* IEEE80211_MODE_FH */ 77 "turboA", /* IEEE80211_MODE_TURBO_A */ 78 "turboG", /* IEEE80211_MODE_TURBO_G */ 79 "sturboA", /* IEEE80211_MODE_STURBO_A */ 80 "11na", /* IEEE80211_MODE_11NA */ 81 "11ng", /* IEEE80211_MODE_11NG */ 82 }; 83 84 /* 85 * Default supported rates for 802.11 operation (in IEEE .5Mb units). 86 */ 87 #define B(r) ((r) | IEEE80211_RATE_BASIC) 88 static const struct ieee80211_rateset ieee80211_rateset_11a = 89 { 8, { B(12), 18, B(24), 36, B(48), 72, 96, 108 } }; 90 static const struct ieee80211_rateset ieee80211_rateset_half = 91 { 8, { B(6), 9, B(12), 18, B(24), 36, 48, 54 } }; 92 static const struct ieee80211_rateset ieee80211_rateset_quarter = 93 { 8, { B(3), 4, B(6), 9, B(12), 18, 24, 27 } }; 94 static const struct ieee80211_rateset ieee80211_rateset_11b = 95 { 4, { B(2), B(4), B(11), B(22) } }; 96 /* NB: OFDM rates are handled specially based on mode */ 97 static const struct ieee80211_rateset ieee80211_rateset_11g = 98 { 12, { B(2), B(4), B(11), B(22), 12, 18, 24, 36, 48, 72, 96, 108 } }; 99 #undef B 100 101 static int media_status(enum ieee80211_opmode , 102 const struct ieee80211_channel *); 103 104 /* list of all instances */ 105 struct ieee80211_list ieee80211_list = 106 SLIST_HEAD_INITIALIZER(ieee80211_list); 107 static uint8_t ieee80211_vapmap[32]; /* enough for 256 */ 108 109 static void 110 ieee80211_add_vap(struct ieee80211com *ic) 111 { 112 #define N(a) (sizeof(a)/sizeof(a[0])) 113 int i; 114 int s; 115 uint8_t b; 116 117 s = splnet(); 118 ic->ic_vap = 0; 119 for (i = 0; i < N(ieee80211_vapmap) && ieee80211_vapmap[i] == 0xff; i++) 120 ic->ic_vap += NBBY; 121 if (i == N(ieee80211_vapmap)) 122 panic("vap table full"); 123 for (b = ieee80211_vapmap[i]; b & 1; b >>= 1) 124 ic->ic_vap++; 125 setbit(ieee80211_vapmap, ic->ic_vap); 126 SLIST_INSERT_HEAD(&ieee80211_list, ic, ic_next); 127 splx(s); 128 #undef N 129 } 130 131 static void 132 ieee80211_remove_vap(struct ieee80211com *ic) 133 { 134 int s; 135 136 s = splnet(); 137 SLIST_REMOVE(&ieee80211_list, ic, ieee80211com, ic_next); 138 IASSERT(ic->ic_vap < sizeof(ieee80211_vapmap)*NBBY, 139 ("invalid vap id %d", ic->ic_vap)); 140 IASSERT(isset(ieee80211_vapmap, ic->ic_vap), 141 ("vap id %d not allocated", ic->ic_vap)); 142 clrbit(ieee80211_vapmap, ic->ic_vap); 143 splx(s); 144 } 145 146 /* 147 * Default reset method for use with the ioctl support. This 148 * method is invoked after any state change in the 802.11 149 * layer that should be propagated to the hardware but not 150 * require re-initialization of the 802.11 state machine (e.g 151 * rescanning for an ap). We always return ENETRESET which 152 * should cause the driver to re-initialize the device. Drivers 153 * can override this method to implement more optimized support. 154 */ 155 static int 156 ieee80211_default_reset(struct ifnet *ifp) 157 { 158 return ENETRESET; 159 } 160 161 /* 162 * Fill in 802.11 available channel set, mark 163 * all available channels as active, and pick 164 * a default channel if not already specified. 165 */ 166 static void 167 ieee80211_chan_init(struct ieee80211com *ic) 168 { 169 #define DEFAULTRATES(m, def) do { \ 170 if (isset(ic->ic_modecaps, m) && ic->ic_sup_rates[m].rs_nrates == 0) \ 171 ic->ic_sup_rates[m] = def; \ 172 } while (0) 173 struct ieee80211_channel *c; 174 int i; 175 176 IASSERT(0 < ic->ic_nchans && ic->ic_nchans < IEEE80211_CHAN_MAX, 177 ("invalid number of channels specified: %u", ic->ic_nchans)); 178 memset(ic->ic_chan_avail, 0, sizeof(ic->ic_chan_avail)); 179 setbit(ic->ic_modecaps, IEEE80211_MODE_AUTO); 180 for (i = 0; i < ic->ic_nchans; i++) { 181 c = &ic->ic_channels[i]; 182 IASSERT(c->ic_flags != 0, ("channel with no flags")); 183 IASSERT(c->ic_ieee < IEEE80211_CHAN_MAX, 184 ("channel with bogus ieee number %u", c->ic_ieee)); 185 setbit(ic->ic_chan_avail, c->ic_ieee); 186 /* 187 * Identify mode capabilities. 188 */ 189 if (IEEE80211_IS_CHAN_A(c)) 190 setbit(ic->ic_modecaps, IEEE80211_MODE_11A); 191 if (IEEE80211_IS_CHAN_B(c)) 192 setbit(ic->ic_modecaps, IEEE80211_MODE_11B); 193 if (IEEE80211_IS_CHAN_ANYG(c)) 194 setbit(ic->ic_modecaps, IEEE80211_MODE_11G); 195 if (IEEE80211_IS_CHAN_FHSS(c)) 196 setbit(ic->ic_modecaps, IEEE80211_MODE_FH); 197 if (IEEE80211_IS_CHAN_108A(c)) 198 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_A); 199 if (IEEE80211_IS_CHAN_108G(c)) 200 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_G); 201 if (IEEE80211_IS_CHAN_ST(c)) 202 setbit(ic->ic_modecaps, IEEE80211_MODE_STURBO_A); 203 if (IEEE80211_IS_CHAN_HTA(c)) 204 setbit(ic->ic_modecaps, IEEE80211_MODE_11NA); 205 if (IEEE80211_IS_CHAN_HTG(c)) 206 setbit(ic->ic_modecaps, IEEE80211_MODE_11NG); 207 } 208 /* initialize candidate channels to all available */ 209 memcpy(ic->ic_chan_active, ic->ic_chan_avail, 210 sizeof(ic->ic_chan_avail)); 211 212 ic->ic_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */ 213 ic->ic_bsschan = IEEE80211_CHAN_ANYC; 214 ic->ic_prevchan = NULL; 215 /* arbitrarily pick the first channel */ 216 ic->ic_curchan = &ic->ic_channels[0]; 217 218 /* fillin well-known rate sets if driver has not specified */ 219 DEFAULTRATES(IEEE80211_MODE_11B, ieee80211_rateset_11b); 220 DEFAULTRATES(IEEE80211_MODE_11G, ieee80211_rateset_11g); 221 DEFAULTRATES(IEEE80211_MODE_11A, ieee80211_rateset_11a); 222 DEFAULTRATES(IEEE80211_MODE_TURBO_A, ieee80211_rateset_11a); 223 DEFAULTRATES(IEEE80211_MODE_TURBO_G, ieee80211_rateset_11g); 224 225 /* 226 * Set auto mode to reset active channel state and any desired channel. 227 */ 228 (void) ieee80211_setmode(ic, IEEE80211_MODE_AUTO); 229 #undef DEFAULTRATES 230 } 231 232 void 233 ieee80211_ifattach(struct ieee80211com *ic) 234 { 235 struct ifnet *ifp = ic->ic_ifp; 236 237 #ifdef __NetBSD__ 238 net80211_init(); 239 #endif /* __NetBSD__ */ 240 241 ether_ifattach(ifp, ic->ic_myaddr); 242 ifp->if_output = ieee80211_output; 243 244 #if NBPFILTER > 0 245 bpfattach2(ifp, DLT_IEEE802_11, 246 sizeof(struct ieee80211_frame_addr4), &ic->ic_rawbpf); 247 #endif 248 249 /* override the 802.3 setting */ 250 ifp->if_hdrlen = ic->ic_headroom 251 + sizeof(struct ieee80211_qosframe_addr4) 252 + IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN 253 + IEEE80211_WEP_EXTIVLEN; 254 /* XXX no way to recalculate on ifdetach */ 255 if (ALIGN(ifp->if_hdrlen) > max_linkhdr) { 256 /* XXX sanity check... */ 257 max_linkhdr = ALIGN(ifp->if_hdrlen); 258 max_hdr = max_linkhdr + max_protohdr; 259 max_datalen = MHLEN - max_hdr; 260 } 261 262 /* 263 * Fill in 802.11 available channel set, mark all 264 * available channels as active, and pick a default 265 * channel if not already specified. 266 */ 267 ieee80211_chan_init(ic); 268 269 if (ic->ic_caps & IEEE80211_C_BGSCAN) /* enable if capable */ 270 ic->ic_flags |= IEEE80211_F_BGSCAN; 271 #if 0 272 /* XXX not until WME+WPA issues resolved */ 273 if (ic->ic_caps & IEEE80211_C_WME) /* enable if capable */ 274 ic->ic_flags |= IEEE80211_F_WME; 275 #endif 276 if (ic->ic_caps & IEEE80211_C_BURST) 277 ic->ic_flags |= IEEE80211_F_BURST; 278 ic->ic_flags |= IEEE80211_F_DOTH; /* XXX out of caps, just ena */ 279 280 ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT; 281 ic->ic_bmissthreshold = IEEE80211_HWBMISS_DEFAULT; 282 ic->ic_dtim_period = IEEE80211_DTIM_DEFAULT; 283 IEEE80211_LOCK_INIT(ic, "ieee80211com"); 284 IEEE80211_BEACON_LOCK_INIT(ic, "beacon"); 285 286 ic->ic_lintval = ic->ic_bintval; 287 ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX; 288 289 ieee80211_crypto_attach(ic); 290 ieee80211_node_attach(ic); 291 ieee80211_power_attach(ic); 292 ieee80211_proto_attach(ic); 293 ieee80211_ht_attach(ic); 294 ieee80211_scan_attach(ic); 295 296 ieee80211_add_vap(ic); 297 298 ieee80211_sysctl_attach(ic); /* NB: requires ic_vap */ 299 300 /* 301 * Install a default reset method for the ioctl support. 302 * The driver is expected to fill this in before calling us. 303 */ 304 if (ic->ic_reset == NULL) 305 ic->ic_reset = ieee80211_default_reset; 306 307 #if !defined(__NetBSD__) 308 IASSERT(ifp->if_llsoftc == NULL, ("oops, hosed")); 309 ifp->if_llsoftc = ic; 310 #endif 311 } 312 313 void 314 ieee80211_ifdetach(struct ieee80211com *ic) 315 { 316 struct ifnet *ifp = ic->ic_ifp; 317 318 ieee80211_remove_vap(ic); 319 320 ieee80211_sysctl_detach(ic); 321 ieee80211_scan_detach(ic); 322 ieee80211_ht_detach(ic); 323 /* NB: must be called before ieee80211_node_detach */ 324 ieee80211_proto_detach(ic); 325 ieee80211_crypto_detach(ic); 326 ieee80211_power_detach(ic); 327 ieee80211_node_detach(ic); 328 ifmedia_delete_instance(&ic->ic_media, IFM_INST_ANY); 329 330 IEEE80211_LOCK_DESTROY(ic); 331 IEEE80211_BEACON_LOCK_DESTROY(ic); 332 333 #if NBPFILTER > 0 334 bpfdetach(ifp); 335 #endif 336 ether_ifdetach(ifp); 337 } 338 339 static __inline int 340 mapgsm(u_int freq, u_int flags) 341 { 342 freq *= 10; 343 if (flags & IEEE80211_CHAN_QUARTER) 344 freq += 5; 345 else if (flags & IEEE80211_CHAN_HALF) 346 freq += 10; 347 else 348 freq += 20; 349 /* NB: there is no 907/20 wide but leave room */ 350 return (freq - 906*10) / 5; 351 } 352 353 static __inline int 354 mappsb(u_int freq, u_int flags) 355 { 356 return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5; 357 } 358 359 /* 360 * Convert MHz frequency to IEEE channel number. 361 */ 362 int 363 ieee80211_mhz2ieee(u_int freq, u_int flags) 364 { 365 #define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990) 366 if (flags & IEEE80211_CHAN_GSM) 367 return mapgsm(freq, flags); 368 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 369 if (freq == 2484) 370 return 14; 371 if (freq < 2484) 372 return ((int) freq - 2407) / 5; 373 else 374 return 15 + ((freq - 2512) / 20); 375 } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */ 376 if (freq <= 5000) { 377 /* XXX check regdomain? */ 378 if (IS_FREQ_IN_PSB(freq)) 379 return mappsb(freq, flags); 380 return (freq - 4000) / 5; 381 } else 382 return (freq - 5000) / 5; 383 } else { /* either, guess */ 384 if (freq == 2484) 385 return 14; 386 if (freq < 2484) { 387 if (907 <= freq && freq <= 922) 388 return mapgsm(freq, flags); 389 return ((int) freq - 2407) / 5; 390 } 391 if (freq < 5000) { 392 if (IS_FREQ_IN_PSB(freq)) 393 return mappsb(freq, flags); 394 else if (freq > 4900) 395 return (freq - 4000) / 5; 396 else 397 return 15 + ((freq - 2512) / 20); 398 } 399 return (freq - 5000) / 5; 400 } 401 #undef IS_FREQ_IN_PSB 402 } 403 404 /* 405 * Convert channel to IEEE channel number. 406 */ 407 int 408 ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c) 409 { 410 if (c == NULL) { 411 if_printf(ic->ic_ifp, "invalid channel (NULL)\n"); 412 return 0; /* XXX */ 413 } 414 return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee); 415 } 416 417 /* 418 * Convert IEEE channel number to MHz frequency. 419 */ 420 u_int 421 ieee80211_ieee2mhz(u_int chan, u_int flags) 422 { 423 if (flags & IEEE80211_CHAN_GSM) 424 return 907 + 5 * (chan / 10); 425 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 426 if (chan == 14) 427 return 2484; 428 if (chan < 14) 429 return 2407 + chan*5; 430 else 431 return 2512 + ((chan-15)*20); 432 } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */ 433 if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) { 434 chan -= 37; 435 return 4940 + chan*5 + (chan % 5 ? 2 : 0); 436 } 437 return 5000 + (chan*5); 438 } else { /* either, guess */ 439 /* XXX can't distinguish PSB+GSM channels */ 440 if (chan == 14) 441 return 2484; 442 if (chan < 14) /* 0-13 */ 443 return 2407 + chan*5; 444 if (chan < 27) /* 15-26 */ 445 return 2512 + ((chan-15)*20); 446 return 5000 + (chan*5); 447 } 448 } 449 450 /* 451 * Locate a channel given a frequency+flags. We cache 452 * the previous lookup to optimize swithing between two 453 * channels--as happens with dynamic turbo. 454 */ 455 struct ieee80211_channel * 456 ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags) 457 { 458 struct ieee80211_channel *c; 459 int i; 460 461 flags &= IEEE80211_CHAN_ALLTURBO; 462 c = ic->ic_prevchan; 463 if (c != NULL && c->ic_freq == freq && 464 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 465 return c; 466 /* brute force search */ 467 for (i = 0; i < ic->ic_nchans; i++) { 468 c = &ic->ic_channels[i]; 469 if (c->ic_freq == freq && 470 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 471 return c; 472 } 473 return NULL; 474 } 475 476 /* 477 * Locate a channel given a channel number+flags. We cache 478 * the previous lookup to optimize switching between two 479 * channels--as happens with dynamic turbo. 480 */ 481 struct ieee80211_channel * 482 ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags) 483 { 484 struct ieee80211_channel *c; 485 int i; 486 487 flags &= IEEE80211_CHAN_ALLTURBO; 488 c = ic->ic_prevchan; 489 if (c != NULL && c->ic_ieee == ieee && 490 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 491 return c; 492 /* brute force search */ 493 for (i = 0; i < ic->ic_nchans; i++) { 494 c = &ic->ic_channels[i]; 495 if (c->ic_ieee == ieee && 496 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 497 return c; 498 } 499 return NULL; 500 } 501 502 static void 503 addmedia(struct ieee80211com *ic, int mode, int mword) 504 { 505 #define TURBO(m) ((m) | IFM_IEEE80211_TURBO) 506 #define ADD(_ic, _s, _o) \ 507 ifmedia_add(&(_ic)->ic_media, \ 508 IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL) 509 static const u_int mopts[IEEE80211_MODE_MAX] = { 510 IFM_AUTO, /* IEEE80211_MODE_AUTO */ 511 IFM_IEEE80211_11A, /* IEEE80211_MODE_11A */ 512 IFM_IEEE80211_11B, /* IEEE80211_MODE_11B */ 513 IFM_IEEE80211_11G, /* IEEE80211_MODE_11G */ 514 IFM_IEEE80211_FH, /* IEEE80211_MODE_FH */ 515 TURBO(IFM_IEEE80211_11A), /* IEEE80211_MODE_TURBO_A */ 516 TURBO(IFM_IEEE80211_11G), /* IEEE80211_MODE_TURBO_G */ 517 TURBO(IFM_IEEE80211_11A), /* IEEE80211_MODE_STURBO_A */ 518 IFM_IEEE80211_11NA, /* IEEE80211_MODE_11NA */ 519 IFM_IEEE80211_11NG, /* IEEE80211_MODE_11NG */ 520 }; 521 u_int mopt; 522 523 IASSERT(mode < IEEE80211_MODE_MAX, ("bad mode %u", mode)); 524 mopt = mopts[mode]; 525 IASSERT(mopt != 0 || mode == IEEE80211_MODE_AUTO, 526 ("no media mapping for mode %u", mode)); 527 528 ADD(ic, mword, mopt); /* e.g. 11a auto */ 529 if (ic->ic_caps & IEEE80211_C_IBSS) 530 ADD(ic, mword, mopt | IFM_IEEE80211_ADHOC); 531 if (ic->ic_caps & IEEE80211_C_HOSTAP) 532 ADD(ic, mword, mopt | IFM_IEEE80211_HOSTAP); 533 if (ic->ic_caps & IEEE80211_C_AHDEMO) 534 ADD(ic, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0); 535 if (ic->ic_caps & IEEE80211_C_MONITOR) 536 ADD(ic, mword, mopt | IFM_IEEE80211_MONITOR); 537 #undef ADD 538 #undef TURBO 539 } 540 541 /* 542 * Setup the media data structures according to the channel and 543 * rate tables. This must be called by the driver after 544 * ieee80211_attach and before most anything else. 545 */ 546 void 547 ieee80211_media_init(struct ieee80211com *ic, 548 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) 549 { 550 struct ifnet *ifp = ic->ic_ifp; 551 int i, j, mode, rate, maxrate, mword, r; 552 const struct ieee80211_rateset *rs; 553 struct ieee80211_rateset allrates; 554 555 /* XXXNH */ 556 /* NB: this works because the structure is initialized to zero */ 557 if (TAILQ_EMPTY(&ic->ic_media.ifm_list)) { 558 /* 559 * Do late attach work that must wait for any subclass 560 * (i.e. driver) work such as overriding methods. 561 */ 562 ieee80211_node_lateattach(ic); 563 } else { 564 /* 565 * We are re-initializing the channel list; clear 566 * the existing media state as the media routines 567 * don't suppress duplicates. 568 */ 569 ifmedia_delete_instance(&ic->ic_media, IFM_INST_ANY); 570 ieee80211_chan_init(ic); 571 } 572 ieee80211_power_lateattach(ic); 573 574 #ifdef IEEE80211_NO_HOSTAP 575 ic->ic_caps &= ~IEEE80211_C_HOSTAP; 576 #endif /* IEEE80211_NO_HOSTAP */ 577 578 /* 579 * Fill in media characteristics. 580 */ 581 ifmedia_init(&ic->ic_media, 0, media_change, media_stat); 582 maxrate = 0; 583 /* 584 * Add media for legacy operating modes. 585 */ 586 memset(&allrates, 0, sizeof(allrates)); 587 for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) { 588 if (isclr(ic->ic_modecaps, mode)) 589 continue; 590 addmedia(ic, mode, IFM_AUTO); 591 if (mode == IEEE80211_MODE_AUTO) 592 continue; 593 rs = &ic->ic_sup_rates[mode]; 594 for (i = 0; i < rs->rs_nrates; i++) { 595 rate = rs->rs_rates[i]; 596 mword = ieee80211_rate2media(ic, rate, mode); 597 if (mword == 0) 598 continue; 599 addmedia(ic, mode, mword); 600 /* 601 * Add legacy rate to the collection of all rates. 602 */ 603 r = rate & IEEE80211_RATE_VAL; 604 for (j = 0; j < allrates.rs_nrates; j++) 605 if (allrates.rs_rates[j] == r) 606 break; 607 if (j == allrates.rs_nrates) { 608 /* unique, add to the set */ 609 allrates.rs_rates[j] = r; 610 allrates.rs_nrates++; 611 } 612 rate = (rate & IEEE80211_RATE_VAL) / 2; 613 if (rate > maxrate) 614 maxrate = rate; 615 } 616 } 617 for (i = 0; i < allrates.rs_nrates; i++) { 618 mword = ieee80211_rate2media(ic, allrates.rs_rates[i], 619 IEEE80211_MODE_AUTO); 620 if (mword == 0) 621 continue; 622 /* NB: remove media options from mword */ 623 addmedia(ic, IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword)); 624 } 625 /* 626 * Add HT/11n media. Note that we do not have enough 627 * bits in the media subtype to express the MCS so we 628 * use a "placeholder" media subtype and any fixed MCS 629 * must be specified with a different mechanism. 630 */ 631 for (; mode < IEEE80211_MODE_MAX; mode++) { 632 if (isclr(ic->ic_modecaps, mode)) 633 continue; 634 addmedia(ic, mode, IFM_AUTO); 635 addmedia(ic, mode, IFM_IEEE80211_MCS); 636 } 637 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) || 638 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) { 639 addmedia(ic, IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS); 640 /* XXX could walk htrates */ 641 /* XXX known array size */ 642 if (ieee80211_htrates[15] > maxrate) 643 maxrate = ieee80211_htrates[15]; 644 } 645 646 /* NB: strip explicit mode; we're actually in autoselect */ 647 ifmedia_set(&ic->ic_media, 648 media_status(ic->ic_opmode, ic->ic_curchan) &~ IFM_MMASK); 649 650 if (maxrate) 651 ifp->if_baudrate = IF_Mbps(maxrate); 652 } 653 654 const struct ieee80211_rateset * 655 ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c) 656 { 657 if (IEEE80211_IS_CHAN_HALF(c)) 658 return &ieee80211_rateset_half; 659 if (IEEE80211_IS_CHAN_QUARTER(c)) 660 return &ieee80211_rateset_quarter; 661 if (IEEE80211_IS_CHAN_HTA(c)) 662 return &ic->ic_sup_rates[IEEE80211_MODE_11A]; 663 if (IEEE80211_IS_CHAN_HTG(c)) { 664 /* XXX does this work for basic rates? */ 665 return &ic->ic_sup_rates[IEEE80211_MODE_11G]; 666 } 667 return &ic->ic_sup_rates[ieee80211_chan2mode(c)]; 668 } 669 670 void 671 ieee80211_announce(struct ieee80211com *ic) 672 { 673 struct ifnet *ifp = ic->ic_ifp; 674 int i, mode, rate, mword; 675 const struct ieee80211_rateset *rs; 676 677 /* NB: skip AUTO since it has no rates */ 678 for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) { 679 if (isclr(ic->ic_modecaps, mode)) 680 continue; 681 aprint_normal("%s: %s rates: ", ifp->if_xname, 682 ieee80211_phymode_name[mode]); 683 rs = &ic->ic_sup_rates[mode]; 684 for (i = 0; i < rs->rs_nrates; i++) { 685 mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode); 686 if (mword == 0) 687 continue; 688 rate = ieee80211_media2rate(mword); 689 aprint_normal("%s%d%sMbps", (i != 0 ? " " : ""), 690 rate / 2, ((rate & 0x1) != 0 ? ".5" : "")); 691 } 692 aprint_normal("\n"); 693 } 694 ieee80211_ht_announce(ic); 695 } 696 697 void 698 ieee80211_announce_channels(struct ieee80211com *ic) 699 { 700 const struct ieee80211_channel *c; 701 char type; 702 int i, cw; 703 704 printf("Chan Freq CW RegPwr MinPwr MaxPwr\n"); 705 for (i = 0; i < ic->ic_nchans; i++) { 706 c = &ic->ic_channels[i]; 707 if (IEEE80211_IS_CHAN_ST(c)) 708 type = 'S'; 709 else if (IEEE80211_IS_CHAN_108A(c)) 710 type = 'T'; 711 else if (IEEE80211_IS_CHAN_108G(c)) 712 type = 'G'; 713 else if (IEEE80211_IS_CHAN_HT(c)) 714 type = 'n'; 715 else if (IEEE80211_IS_CHAN_A(c)) 716 type = 'a'; 717 else if (IEEE80211_IS_CHAN_ANYG(c)) 718 type = 'g'; 719 else if (IEEE80211_IS_CHAN_B(c)) 720 type = 'b'; 721 else 722 type = 'f'; 723 if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c)) 724 cw = 40; 725 else if (IEEE80211_IS_CHAN_HALF(c)) 726 cw = 10; 727 else if (IEEE80211_IS_CHAN_QUARTER(c)) 728 cw = 5; 729 else 730 cw = 20; 731 printf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n" 732 , c->ic_ieee, c->ic_freq, type 733 , cw 734 , IEEE80211_IS_CHAN_HT40U(c) ? '+' : 735 IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' ' 736 , c->ic_maxregpower 737 , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0 738 , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0 739 ); 740 } 741 } 742 743 /* 744 * Find an instance by it's mac address. 745 */ 746 struct ieee80211com * 747 ieee80211_find_vap(const uint8_t mac[IEEE80211_ADDR_LEN]) 748 { 749 int s; 750 struct ieee80211com *ic; 751 752 s = splnet(); 753 SLIST_FOREACH(ic, &ieee80211_list, ic_next) 754 if (IEEE80211_ADDR_EQ(mac, ic->ic_myaddr)) 755 break; 756 splx(s); 757 return ic; 758 } 759 760 static struct ieee80211com * 761 ieee80211_find_instance(struct ifnet *ifp) 762 { 763 int s; 764 struct ieee80211com *ic; 765 766 s = splnet(); 767 /* XXX not right for multiple instances but works for now */ 768 SLIST_FOREACH(ic, &ieee80211_list, ic_next) 769 if (ic->ic_ifp == ifp) 770 break; 771 splx(s); 772 return ic; 773 } 774 775 static int 776 findrate(struct ieee80211com *ic, enum ieee80211_phymode mode, int rate) 777 { 778 #define IEEERATE(_ic,_m,_i) \ 779 ((_ic)->ic_sup_rates[_m].rs_rates[_i] & IEEE80211_RATE_VAL) 780 int i, nrates = ic->ic_sup_rates[mode].rs_nrates; 781 for (i = 0; i < nrates; i++) 782 if (IEEERATE(ic, mode, i) == rate) 783 return i; 784 return -1; 785 #undef IEEERATE 786 } 787 788 /* 789 * Convert a media specification to a rate index and possibly a mode 790 * (if the rate is fixed and the mode is specified as ``auto'' then 791 * we need to lock down the mode so the index is meanginful). 792 */ 793 static int 794 checkrate(struct ieee80211com *ic, enum ieee80211_phymode mode, int rate) 795 { 796 797 /* 798 * Check the rate table for the specified/current phy. 799 */ 800 if (mode == IEEE80211_MODE_AUTO) { 801 int i; 802 /* 803 * In autoselect mode search for the rate. 804 */ 805 for (i = IEEE80211_MODE_11A; i < IEEE80211_MODE_MAX; i++) { 806 if (isset(ic->ic_modecaps, i) && 807 findrate(ic, i, rate) != -1) 808 return 1; 809 } 810 return 0; 811 } else { 812 /* 813 * Mode is fixed, check for rate. 814 */ 815 return (findrate(ic, mode, rate) != -1); 816 } 817 } 818 819 /* 820 * Handle a media change request. 821 */ 822 int 823 ieee80211_media_change(struct ifnet *ifp) 824 { 825 struct ieee80211com *ic; 826 struct ifmedia_entry *ime; 827 enum ieee80211_opmode newopmode; 828 enum ieee80211_phymode newphymode; 829 int newrate, error = 0; 830 831 ic = ieee80211_find_instance(ifp); 832 if (!ic) { 833 if_printf(ifp, "%s: no 802.11 instance!\n", __func__); 834 return EINVAL; 835 } 836 ime = ic->ic_media.ifm_cur; 837 /* 838 * First, identify the phy mode. 839 */ 840 switch (IFM_MODE(ime->ifm_media)) { 841 case IFM_IEEE80211_11A: 842 newphymode = IEEE80211_MODE_11A; 843 break; 844 case IFM_IEEE80211_11B: 845 newphymode = IEEE80211_MODE_11B; 846 break; 847 case IFM_IEEE80211_11G: 848 newphymode = IEEE80211_MODE_11G; 849 break; 850 case IFM_IEEE80211_FH: 851 newphymode = IEEE80211_MODE_FH; 852 break; 853 case IFM_IEEE80211_11NA: 854 newphymode = IEEE80211_MODE_11NA; 855 break; 856 case IFM_IEEE80211_11NG: 857 newphymode = IEEE80211_MODE_11NG; 858 break; 859 case IFM_AUTO: 860 newphymode = IEEE80211_MODE_AUTO; 861 break; 862 default: 863 return EINVAL; 864 } 865 /* 866 * Turbo mode is an ``option''. 867 * XXX does not apply to AUTO 868 */ 869 if (ime->ifm_media & IFM_IEEE80211_TURBO) { 870 if (newphymode == IEEE80211_MODE_11A) { 871 if (ic->ic_flags & IEEE80211_F_TURBOP) 872 newphymode = IEEE80211_MODE_TURBO_A; 873 else 874 newphymode = IEEE80211_MODE_STURBO_A; 875 } else if (newphymode == IEEE80211_MODE_11G) 876 newphymode = IEEE80211_MODE_TURBO_G; 877 else 878 return EINVAL; 879 } 880 /* XXX HT40 +/- */ 881 /* 882 * Next, the fixed/variable rate. 883 */ 884 newrate = ic->ic_fixed_rate; 885 if (IFM_SUBTYPE(ime->ifm_media) != IFM_AUTO) { 886 /* 887 * Convert media subtype to rate. 888 */ 889 newrate = ieee80211_media2rate(ime->ifm_media); 890 if (newrate == 0 || !checkrate(ic, newphymode, newrate)) 891 return EINVAL; 892 } else 893 newrate = IEEE80211_FIXED_RATE_NONE; 894 895 /* 896 * Deduce new operating mode but don't install it just yet. 897 */ 898 if ((ime->ifm_media & (IFM_IEEE80211_ADHOC|IFM_FLAG0)) == 899 (IFM_IEEE80211_ADHOC|IFM_FLAG0)) 900 newopmode = IEEE80211_M_AHDEMO; 901 else if (ime->ifm_media & IFM_IEEE80211_HOSTAP) 902 newopmode = IEEE80211_M_HOSTAP; 903 else if (ime->ifm_media & IFM_IEEE80211_ADHOC) 904 newopmode = IEEE80211_M_IBSS; 905 else if (ime->ifm_media & IFM_IEEE80211_MONITOR) 906 newopmode = IEEE80211_M_MONITOR; 907 else 908 newopmode = IEEE80211_M_STA; 909 910 /* 911 * Handle phy mode change. 912 */ 913 if (ic->ic_des_mode != newphymode) { /* change phy mode */ 914 ic->ic_des_mode = newphymode; 915 error = ENETRESET; 916 } 917 918 /* 919 * Committed to changes, install the rate setting. 920 */ 921 if (ic->ic_fixed_rate != newrate) { 922 ic->ic_fixed_rate = newrate; /* set fixed tx rate */ 923 error = ENETRESET; 924 } 925 926 /* 927 * Handle operating mode change. 928 */ 929 if (ic->ic_opmode != newopmode) { 930 ic->ic_opmode = newopmode; 931 switch (newopmode) { 932 case IEEE80211_M_AHDEMO: 933 case IEEE80211_M_HOSTAP: 934 case IEEE80211_M_STA: 935 case IEEE80211_M_MONITOR: 936 case IEEE80211_M_WDS: 937 ic->ic_flags &= ~IEEE80211_F_IBSSON; 938 break; 939 case IEEE80211_M_IBSS: 940 ic->ic_flags |= IEEE80211_F_IBSSON; 941 break; 942 } 943 /* 944 * Yech, slot time may change depending on the 945 * operating mode so reset it to be sure everything 946 * is setup appropriately. 947 */ 948 ieee80211_reset_erp(ic); 949 ieee80211_wme_initparams(ic); /* after opmode change */ 950 error = ENETRESET; 951 } 952 #ifdef notdef 953 if (error == 0) 954 ifp->if_baudrate = ifmedia_baudrate(ime->ifm_media); 955 #endif 956 return error; 957 } 958 959 /* 960 * Common code to calculate the media status word 961 * from the operating mode and channel state. 962 */ 963 static int 964 media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan) 965 { 966 int status; 967 968 status = IFM_IEEE80211; 969 switch (opmode) { 970 case IEEE80211_M_STA: 971 break; 972 case IEEE80211_M_IBSS: 973 status |= IFM_IEEE80211_ADHOC; 974 break; 975 case IEEE80211_M_HOSTAP: 976 status |= IFM_IEEE80211_HOSTAP; 977 break; 978 case IEEE80211_M_MONITOR: 979 status |= IFM_IEEE80211_MONITOR; 980 break; 981 case IEEE80211_M_AHDEMO: 982 status |= IFM_IEEE80211_ADHOC | IFM_FLAG0; 983 break; 984 case IEEE80211_M_WDS: 985 /* should not come here */ 986 break; 987 } 988 if (IEEE80211_IS_CHAN_HTA(chan)) { 989 status |= IFM_IEEE80211_11NA; 990 } else if (IEEE80211_IS_CHAN_HTG(chan)) { 991 status |= IFM_IEEE80211_11NG; 992 } else if (IEEE80211_IS_CHAN_A(chan)) { 993 status |= IFM_IEEE80211_11A; 994 } else if (IEEE80211_IS_CHAN_B(chan)) { 995 status |= IFM_IEEE80211_11B; 996 } else if (IEEE80211_IS_CHAN_ANYG(chan)) { 997 status |= IFM_IEEE80211_11G; 998 } else if (IEEE80211_IS_CHAN_FHSS(chan)) { 999 status |= IFM_IEEE80211_FH; 1000 } 1001 /* XXX else complain? */ 1002 1003 if (IEEE80211_IS_CHAN_TURBO(chan)) 1004 status |= IFM_IEEE80211_TURBO; 1005 1006 return status; 1007 } 1008 1009 void 1010 ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1011 { 1012 struct ieee80211com *ic; 1013 enum ieee80211_phymode mode; 1014 const struct ieee80211_rateset *rs; 1015 1016 ic = ieee80211_find_instance(ifp); 1017 if (!ic) { 1018 if_printf(ifp, "%s: no 802.11 instance!\n", __func__); 1019 return; 1020 } 1021 imr->ifm_status = IFM_AVALID; 1022 /* 1023 * NB: use the current channel's mode to lock down a xmit 1024 * rate only when running; otherwise we may have a mismatch 1025 * in which case the rate will not be convertible. 1026 */ 1027 if (ic->ic_state == IEEE80211_S_RUN) { 1028 imr->ifm_status |= IFM_ACTIVE; 1029 mode = ieee80211_chan2mode(ic->ic_curchan); 1030 } else 1031 mode = IEEE80211_MODE_AUTO; 1032 imr->ifm_active = media_status(ic->ic_opmode, ic->ic_curchan); 1033 /* 1034 * Calculate a current rate if possible. 1035 */ 1036 if (ic->ic_fixed_rate != IEEE80211_FIXED_RATE_NONE) { 1037 /* 1038 * A fixed rate is set, report that. 1039 */ 1040 imr->ifm_active |= ieee80211_rate2media(ic, 1041 ic->ic_fixed_rate, mode); 1042 } else if (ic->ic_opmode == IEEE80211_M_STA) { 1043 /* 1044 * In station mode report the current transmit rate. 1045 * XXX HT rate 1046 */ 1047 rs = &ic->ic_bss->ni_rates; 1048 imr->ifm_active |= ieee80211_rate2media(ic, 1049 rs->rs_rates[ic->ic_bss->ni_txrate], mode); 1050 } else 1051 imr->ifm_active |= IFM_AUTO; 1052 } 1053 1054 /* 1055 * Set the current phy mode and recalculate the active channel 1056 * set based on the available channels for this mode. Also 1057 * select a new default/current channel if the current one is 1058 * inappropriate for this mode. 1059 */ 1060 int 1061 ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode) 1062 { 1063 /* 1064 * Adjust basic rates in 11b/11g supported rate set. 1065 * Note that if operating on a hal/quarter rate channel 1066 * this is a noop as those rates sets are different 1067 * and used instead. 1068 */ 1069 if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B) 1070 ieee80211_set11gbasicrates(&ic->ic_sup_rates[mode], mode); 1071 1072 ic->ic_curmode = mode; 1073 ieee80211_reset_erp(ic); /* reset ERP state */ 1074 ieee80211_wme_initparams(ic); /* reset WME stat */ 1075 1076 return 0; 1077 } 1078 1079 /* 1080 * Return the phy mode for with the specified channel. 1081 */ 1082 enum ieee80211_phymode 1083 ieee80211_chan2mode(const struct ieee80211_channel *chan) 1084 { 1085 if (IEEE80211_IS_CHAN_HTA(chan)) 1086 return IEEE80211_MODE_11NA; 1087 else if (IEEE80211_IS_CHAN_HTG(chan)) 1088 return IEEE80211_MODE_11NG; 1089 else if (IEEE80211_IS_CHAN_108G(chan)) 1090 return IEEE80211_MODE_TURBO_G; 1091 else if (IEEE80211_IS_CHAN_ST(chan)) 1092 return IEEE80211_MODE_STURBO_A; 1093 else if (IEEE80211_IS_CHAN_TURBO(chan)) 1094 return IEEE80211_MODE_TURBO_A; 1095 else if (IEEE80211_IS_CHAN_A(chan)) 1096 return IEEE80211_MODE_11A; 1097 else if (IEEE80211_IS_CHAN_ANYG(chan)) 1098 return IEEE80211_MODE_11G; 1099 else if (IEEE80211_IS_CHAN_B(chan)) 1100 return IEEE80211_MODE_11B; 1101 else if (IEEE80211_IS_CHAN_FHSS(chan)) 1102 return IEEE80211_MODE_FH; 1103 1104 /* NB: should not get here */ 1105 printf("%s: cannot map channel to mode; freq %u flags 0x%x\n", 1106 __func__, chan->ic_freq, chan->ic_flags); 1107 return IEEE80211_MODE_11B; 1108 } 1109 1110 struct ratemedia { 1111 u_int match; /* rate + mode */ 1112 u_int media; /* if_media rate */ 1113 }; 1114 1115 static int 1116 findmedia(const struct ratemedia rates[], int n, u_int match) 1117 { 1118 int i; 1119 1120 for (i = 0; i < n; i++) 1121 if (rates[i].match == match) 1122 return rates[i].media; 1123 return IFM_AUTO; 1124 } 1125 1126 /* 1127 * Convert IEEE80211 rate value to ifmedia subtype. 1128 * Rate is either a legacy rate in units of 0.5Mbps 1129 * or an MCS index. 1130 */ 1131 int 1132 ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode) 1133 { 1134 #define N(a) (sizeof(a) / sizeof(a[0])) 1135 static const struct ratemedia rates[] = { 1136 { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 }, 1137 { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 }, 1138 { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 }, 1139 { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 }, 1140 { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 }, 1141 { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 }, 1142 { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 }, 1143 { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 }, 1144 { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 }, 1145 { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 }, 1146 { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 }, 1147 { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 }, 1148 { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 }, 1149 { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 }, 1150 { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 }, 1151 { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 }, 1152 { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 }, 1153 { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 }, 1154 { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 }, 1155 { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 }, 1156 { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 }, 1157 { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 }, 1158 { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 }, 1159 { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 }, 1160 { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 }, 1161 { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 }, 1162 { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 }, 1163 { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 }, 1164 { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 }, 1165 { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 }, 1166 /* NB: OFDM72 doesn't realy exist so we don't handle it */ 1167 }; 1168 static const struct ratemedia htrates[] = { 1169 { 0, IFM_IEEE80211_MCS }, 1170 { 1, IFM_IEEE80211_MCS }, 1171 { 2, IFM_IEEE80211_MCS }, 1172 { 3, IFM_IEEE80211_MCS }, 1173 { 4, IFM_IEEE80211_MCS }, 1174 { 5, IFM_IEEE80211_MCS }, 1175 { 6, IFM_IEEE80211_MCS }, 1176 { 7, IFM_IEEE80211_MCS }, 1177 { 8, IFM_IEEE80211_MCS }, 1178 { 9, IFM_IEEE80211_MCS }, 1179 { 10, IFM_IEEE80211_MCS }, 1180 { 11, IFM_IEEE80211_MCS }, 1181 { 12, IFM_IEEE80211_MCS }, 1182 { 13, IFM_IEEE80211_MCS }, 1183 { 14, IFM_IEEE80211_MCS }, 1184 { 15, IFM_IEEE80211_MCS }, 1185 }; 1186 int m; 1187 1188 /* 1189 * Check 11n rates first for match as an MCS. 1190 */ 1191 if (mode == IEEE80211_MODE_11NA) { 1192 if (rate & IEEE80211_RATE_MCS) { 1193 rate &= ~IEEE80211_RATE_MCS; 1194 m = findmedia(htrates, N(htrates), rate); 1195 if (m != IFM_AUTO) 1196 return m | IFM_IEEE80211_11NA; 1197 } 1198 } else if (mode == IEEE80211_MODE_11NG) { 1199 /* NB: 12 is ambiguous, it will be treated as an MCS */ 1200 if (rate & IEEE80211_RATE_MCS) { 1201 rate &= ~IEEE80211_RATE_MCS; 1202 m = findmedia(htrates, N(htrates), rate); 1203 if (m != IFM_AUTO) 1204 return m | IFM_IEEE80211_11NG; 1205 } 1206 } 1207 rate &= IEEE80211_RATE_VAL; 1208 switch (mode) { 1209 case IEEE80211_MODE_11A: 1210 case IEEE80211_MODE_11NA: 1211 case IEEE80211_MODE_TURBO_A: 1212 case IEEE80211_MODE_STURBO_A: 1213 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11A); 1214 case IEEE80211_MODE_11B: 1215 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11B); 1216 case IEEE80211_MODE_FH: 1217 return findmedia(rates, N(rates), rate | IFM_IEEE80211_FH); 1218 case IEEE80211_MODE_AUTO: 1219 /* NB: ic may be NULL for some drivers */ 1220 if (ic && ic->ic_phytype == IEEE80211_T_FH) 1221 return findmedia(rates, N(rates), 1222 rate | IFM_IEEE80211_FH); 1223 /* NB: hack, 11g matches both 11b+11a rates */ 1224 /* fall thru... */ 1225 case IEEE80211_MODE_11G: 1226 case IEEE80211_MODE_11NG: 1227 case IEEE80211_MODE_TURBO_G: 1228 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11G); 1229 } 1230 return IFM_AUTO; 1231 #undef N 1232 } 1233 1234 int 1235 ieee80211_media2rate(int mword) 1236 { 1237 #define N(a) (sizeof(a) / sizeof(a[0])) 1238 static const int ieeerates[] = { 1239 -1, /* IFM_AUTO */ 1240 0, /* IFM_MANUAL */ 1241 0, /* IFM_NONE */ 1242 2, /* IFM_IEEE80211_FH1 */ 1243 4, /* IFM_IEEE80211_FH2 */ 1244 4, /* IFM_IEEE80211_DS2 */ 1245 11, /* IFM_IEEE80211_DS5 */ 1246 22, /* IFM_IEEE80211_DS11 */ 1247 2, /* IFM_IEEE80211_DS1 */ 1248 44, /* IFM_IEEE80211_DS22 */ 1249 12, /* IFM_IEEE80211_OFDM6 */ 1250 18, /* IFM_IEEE80211_OFDM9 */ 1251 24, /* IFM_IEEE80211_OFDM12 */ 1252 36, /* IFM_IEEE80211_OFDM18 */ 1253 48, /* IFM_IEEE80211_OFDM24 */ 1254 72, /* IFM_IEEE80211_OFDM36 */ 1255 96, /* IFM_IEEE80211_OFDM48 */ 1256 108, /* IFM_IEEE80211_OFDM54 */ 1257 144, /* IFM_IEEE80211_OFDM72 */ 1258 0, /* IFM_IEEE80211_DS354k */ 1259 0, /* IFM_IEEE80211_DS512k */ 1260 6, /* IFM_IEEE80211_OFDM3 */ 1261 9, /* IFM_IEEE80211_OFDM4 */ 1262 54, /* IFM_IEEE80211_OFDM27 */ 1263 -1, /* IFM_IEEE80211_MCS */ 1264 }; 1265 return IFM_SUBTYPE(mword) < N(ieeerates) ? 1266 ieeerates[IFM_SUBTYPE(mword)] : 0; 1267 #undef N 1268 } 1269
Indexes created Thu Oct 02 10:09:58 GMT 2025