| 1 | /* $NetBSD: ieee80211.c,v 1.56 2015/08/24 22:21:26 pooka Exp $ */ |
| 2 | /*- |
| 3 | * Copyright (c) 2001 Atsushi Onoe |
| 4 | * Copyright (c) 2002-2005 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 | * 3. The name of the author may not be used to endorse or promote products |
| 16 | * derived from this software without specific prior written permission. |
| 17 | * |
| 18 | * Alternatively, this software may be distributed under the terms of the |
| 19 | * GNU General Public License ("GPL") version 2 as published by the Free |
| 20 | * Software Foundation. |
| 21 | * |
| 22 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 23 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 24 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 25 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 26 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 27 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 28 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 29 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 30 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 31 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 32 | */ |
| 33 | |
| 34 | #include <sys/cdefs.h> |
| 35 | #ifdef __FreeBSD__ |
| 36 | __FBSDID("$FreeBSD: src/sys/net80211/ieee80211.c,v 1.22 2005/08/10 16:22:29 sam Exp $" ); |
| 37 | #endif |
| 38 | #ifdef __NetBSD__ |
| 39 | __KERNEL_RCSID(0, "$NetBSD: ieee80211.c,v 1.56 2015/08/24 22:21:26 pooka Exp $" ); |
| 40 | #endif |
| 41 | |
| 42 | /* |
| 43 | * IEEE 802.11 generic handler |
| 44 | */ |
| 45 | |
| 46 | #ifdef _KERNEL_OPT |
| 47 | #include "opt_inet.h" |
| 48 | #endif |
| 49 | |
| 50 | #include <sys/param.h> |
| 51 | #include <sys/systm.h> |
| 52 | #include <sys/kernel.h> |
| 53 | |
| 54 | #include <sys/socket.h> |
| 55 | #include <sys/sockio.h> |
| 56 | #include <sys/endian.h> |
| 57 | #include <sys/errno.h> |
| 58 | #include <sys/proc.h> |
| 59 | #include <sys/sysctl.h> |
| 60 | |
| 61 | #include <net/if.h> |
| 62 | #include <net/if_media.h> |
| 63 | #include <net/if_arp.h> |
| 64 | #include <net/if_ether.h> |
| 65 | #include <net/if_llc.h> |
| 66 | |
| 67 | #include <net80211/ieee80211_netbsd.h> |
| 68 | #include <net80211/ieee80211_var.h> |
| 69 | #include <net80211/ieee80211_sysctl.h> |
| 70 | |
| 71 | #include <net/bpf.h> |
| 72 | |
| 73 | #ifdef INET |
| 74 | #include <netinet/in.h> |
| 75 | #include <net/if_ether.h> |
| 76 | #endif |
| 77 | |
| 78 | const struct ieee80211_channel ieee80211_channel_anyc = { |
| 79 | 0, 0 |
| 80 | }; |
| 81 | |
| 82 | struct ieee80211com_head ieee80211com_head = |
| 83 | LIST_HEAD_INITIALIZER(ieee80211com_head); |
| 84 | |
| 85 | const char *ieee80211_phymode_name[] = { |
| 86 | "auto" , /* IEEE80211_MODE_AUTO */ |
| 87 | "11a" , /* IEEE80211_MODE_11A */ |
| 88 | "11b" , /* IEEE80211_MODE_11B */ |
| 89 | "11g" , /* IEEE80211_MODE_11G */ |
| 90 | "FH" , /* IEEE80211_MODE_FH */ |
| 91 | "turboA" , /* IEEE80211_MODE_TURBO_A */ |
| 92 | "turboG" , /* IEEE80211_MODE_TURBO_G */ |
| 93 | }; |
| 94 | |
| 95 | /* list of all instances */ |
| 96 | SLIST_HEAD(ieee80211_list, ieee80211com); |
| 97 | static struct ieee80211_list ieee80211_list = |
| 98 | SLIST_HEAD_INITIALIZER(ieee80211_list); |
| 99 | static u_int8_t ieee80211_vapmap[32]; /* enough for 256 */ |
| 100 | |
| 101 | static void |
| 102 | ieee80211_add_vap(struct ieee80211com *ic) |
| 103 | { |
| 104 | #define N(a) (sizeof(a)/sizeof(a[0])) |
| 105 | int i; |
| 106 | int s; |
| 107 | u_int8_t b; |
| 108 | |
| 109 | s = splnet(); |
| 110 | ic->ic_vap = 0; |
| 111 | for (i = 0; i < N(ieee80211_vapmap) && ieee80211_vapmap[i] == 0xff; i++) |
| 112 | ic->ic_vap += NBBY; |
| 113 | if (i == N(ieee80211_vapmap)) |
| 114 | panic("vap table full" ); |
| 115 | for (b = ieee80211_vapmap[i]; b & 1; b >>= 1) |
| 116 | ic->ic_vap++; |
| 117 | setbit(ieee80211_vapmap, ic->ic_vap); |
| 118 | SLIST_INSERT_HEAD(&ieee80211_list, ic, ic_next); |
| 119 | splx(s); |
| 120 | #undef N |
| 121 | } |
| 122 | |
| 123 | static void |
| 124 | ieee80211_remove_vap(struct ieee80211com *ic) |
| 125 | { |
| 126 | int s; |
| 127 | |
| 128 | s = splnet(); |
| 129 | SLIST_REMOVE(&ieee80211_list, ic, ieee80211com, ic_next); |
| 130 | IASSERT(ic->ic_vap < sizeof(ieee80211_vapmap)*NBBY, |
| 131 | ("invalid vap id %d" , ic->ic_vap)); |
| 132 | IASSERT(isset(ieee80211_vapmap, ic->ic_vap), |
| 133 | ("vap id %d not allocated" , ic->ic_vap)); |
| 134 | clrbit(ieee80211_vapmap, ic->ic_vap); |
| 135 | splx(s); |
| 136 | } |
| 137 | |
| 138 | /* |
| 139 | * Default reset method for use with the ioctl support. This |
| 140 | * method is invoked after any state change in the 802.11 |
| 141 | * layer that should be propagated to the hardware but not |
| 142 | * require re-initialization of the 802.11 state machine (e.g |
| 143 | * rescanning for an ap). We always return ENETRESET which |
| 144 | * should cause the driver to re-initialize the device. Drivers |
| 145 | * can override this method to implement more optimized support. |
| 146 | */ |
| 147 | static int |
| 148 | ieee80211_default_reset(struct ifnet *ifp) |
| 149 | { |
| 150 | return ENETRESET; |
| 151 | } |
| 152 | |
| 153 | void |
| 154 | ieee80211_ifattach(struct ieee80211com *ic) |
| 155 | { |
| 156 | struct ifnet *ifp = ic->ic_ifp; |
| 157 | struct ieee80211_channel *c; |
| 158 | int i; |
| 159 | |
| 160 | #ifdef __NetBSD__ |
| 161 | ieee80211_init(); |
| 162 | #endif /* __NetBSD__ */ |
| 163 | |
| 164 | ether_ifattach(ifp, ic->ic_myaddr); |
| 165 | bpf_attach2(ifp, DLT_IEEE802_11, |
| 166 | sizeof(struct ieee80211_frame_addr4), &ic->ic_rawbpf); |
| 167 | |
| 168 | ieee80211_crypto_attach(ic); |
| 169 | |
| 170 | /* |
| 171 | * Fill in 802.11 available channel set, mark |
| 172 | * all available channels as active, and pick |
| 173 | * a default channel if not already specified. |
| 174 | */ |
| 175 | memset(ic->ic_chan_avail, 0, sizeof(ic->ic_chan_avail)); |
| 176 | ic->ic_modecaps |= 1<<IEEE80211_MODE_AUTO; |
| 177 | for (i = 0; i <= IEEE80211_CHAN_MAX; i++) { |
| 178 | c = &ic->ic_channels[i]; |
| 179 | if (c->ic_flags) { |
| 180 | /* |
| 181 | * Verify driver passed us valid data. |
| 182 | */ |
| 183 | if (i != ieee80211_chan2ieee(ic, c)) { |
| 184 | if_printf(ifp, "bad channel ignored; " |
| 185 | "freq %u flags %x number %u\n" , |
| 186 | c->ic_freq, c->ic_flags, i); |
| 187 | c->ic_flags = 0; /* NB: remove */ |
| 188 | continue; |
| 189 | } |
| 190 | setbit(ic->ic_chan_avail, i); |
| 191 | /* |
| 192 | * Identify mode capabilities. |
| 193 | */ |
| 194 | if (IEEE80211_IS_CHAN_A(c)) |
| 195 | ic->ic_modecaps |= 1<<IEEE80211_MODE_11A; |
| 196 | if (IEEE80211_IS_CHAN_B(c)) |
| 197 | ic->ic_modecaps |= 1<<IEEE80211_MODE_11B; |
| 198 | if (IEEE80211_IS_CHAN_PUREG(c)) |
| 199 | ic->ic_modecaps |= 1<<IEEE80211_MODE_11G; |
| 200 | if (IEEE80211_IS_CHAN_FHSS(c)) |
| 201 | ic->ic_modecaps |= 1<<IEEE80211_MODE_FH; |
| 202 | if (IEEE80211_IS_CHAN_T(c)) |
| 203 | ic->ic_modecaps |= 1<<IEEE80211_MODE_TURBO_A; |
| 204 | if (IEEE80211_IS_CHAN_108G(c)) |
| 205 | ic->ic_modecaps |= 1<<IEEE80211_MODE_TURBO_G; |
| 206 | if (ic->ic_curchan == NULL) { |
| 207 | /* arbitrarily pick the first channel */ |
| 208 | ic->ic_curchan = &ic->ic_channels[i]; |
| 209 | } |
| 210 | } |
| 211 | } |
| 212 | /* validate ic->ic_curmode */ |
| 213 | if ((ic->ic_modecaps & (1<<ic->ic_curmode)) == 0) |
| 214 | ic->ic_curmode = IEEE80211_MODE_AUTO; |
| 215 | ic->ic_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */ |
| 216 | #if 0 |
| 217 | /* |
| 218 | * Enable WME by default if we're capable. |
| 219 | */ |
| 220 | if (ic->ic_caps & IEEE80211_C_WME) |
| 221 | ic->ic_flags |= IEEE80211_F_WME; |
| 222 | #endif |
| 223 | (void) ieee80211_setmode(ic, ic->ic_curmode); |
| 224 | |
| 225 | if (ic->ic_bintval == 0) |
| 226 | ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT; |
| 227 | ic->ic_bmisstimeout = 7*ic->ic_bintval; /* default 7 beacons */ |
| 228 | ic->ic_dtim_period = IEEE80211_DTIM_DEFAULT; |
| 229 | IEEE80211_BEACON_LOCK_INIT(ic, "beacon" ); |
| 230 | |
| 231 | if (ic->ic_lintval == 0) |
| 232 | ic->ic_lintval = ic->ic_bintval; |
| 233 | ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX; |
| 234 | |
| 235 | LIST_INSERT_HEAD(&ieee80211com_head, ic, ic_list); |
| 236 | ieee80211_node_attach(ic); |
| 237 | ieee80211_proto_attach(ic); |
| 238 | |
| 239 | ieee80211_add_vap(ic); |
| 240 | |
| 241 | ieee80211_sysctl_attach(ic); /* NB: requires ic_vap */ |
| 242 | |
| 243 | /* |
| 244 | * Install a default reset method for the ioctl support. |
| 245 | * The driver is expected to fill this in before calling us. |
| 246 | */ |
| 247 | if (ic->ic_reset == NULL) |
| 248 | ic->ic_reset = ieee80211_default_reset; |
| 249 | } |
| 250 | |
| 251 | void |
| 252 | ieee80211_ifdetach(struct ieee80211com *ic) |
| 253 | { |
| 254 | struct ifnet *ifp = ic->ic_ifp; |
| 255 | |
| 256 | ieee80211_remove_vap(ic); |
| 257 | |
| 258 | ieee80211_sysctl_detach(ic); |
| 259 | ieee80211_proto_detach(ic); |
| 260 | ieee80211_crypto_detach(ic); |
| 261 | ieee80211_node_detach(ic); |
| 262 | LIST_REMOVE(ic, ic_list); |
| 263 | ifmedia_delete_instance(&ic->ic_media, IFM_INST_ANY); |
| 264 | |
| 265 | IEEE80211_BEACON_LOCK_DESTROY(ic); |
| 266 | |
| 267 | bpf_detach(ifp); |
| 268 | ether_ifdetach(ifp); |
| 269 | } |
| 270 | |
| 271 | /* |
| 272 | * Convert MHz frequency to IEEE channel number. |
| 273 | */ |
| 274 | u_int |
| 275 | ieee80211_mhz2ieee(u_int freq, u_int flags) |
| 276 | { |
| 277 | if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ |
| 278 | if (freq == 2484) |
| 279 | return 14; |
| 280 | if (freq < 2484) |
| 281 | return (freq - 2407) / 5; |
| 282 | else |
| 283 | return 15 + ((freq - 2512) / 20); |
| 284 | } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5 GHz band */ |
| 285 | return (freq - 5000) / 5; |
| 286 | } else { /* either, guess */ |
| 287 | if (freq == 2484) |
| 288 | return 14; |
| 289 | if (freq < 2484) |
| 290 | return (freq - 2407) / 5; |
| 291 | if (freq < 5000) |
| 292 | return 15 + ((freq - 2512) / 20); |
| 293 | return (freq - 5000) / 5; |
| 294 | } |
| 295 | } |
| 296 | |
| 297 | /* |
| 298 | * Convert channel to IEEE channel number. |
| 299 | */ |
| 300 | u_int |
| 301 | ieee80211_chan2ieee(struct ieee80211com *ic, struct ieee80211_channel *c) |
| 302 | { |
| 303 | if (ic->ic_channels <= c && c <= &ic->ic_channels[IEEE80211_CHAN_MAX]) |
| 304 | return c - ic->ic_channels; |
| 305 | else if (c == IEEE80211_CHAN_ANYC) |
| 306 | return IEEE80211_CHAN_ANY; |
| 307 | else if (c != NULL) { |
| 308 | if_printf(ic->ic_ifp, "invalid channel freq %u flags %x\n" , |
| 309 | c->ic_freq, c->ic_flags); |
| 310 | return 0; /* XXX */ |
| 311 | } else { |
| 312 | if_printf(ic->ic_ifp, "invalid channel (NULL)\n" ); |
| 313 | return 0; /* XXX */ |
| 314 | } |
| 315 | } |
| 316 | |
| 317 | /* |
| 318 | * Convert IEEE channel number to MHz frequency. |
| 319 | */ |
| 320 | u_int |
| 321 | ieee80211_ieee2mhz(u_int chan, u_int flags) |
| 322 | { |
| 323 | if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ |
| 324 | if (chan == 14) |
| 325 | return 2484; |
| 326 | if (chan < 14) |
| 327 | return 2407 + chan*5; |
| 328 | else |
| 329 | return 2512 + ((chan-15)*20); |
| 330 | } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5 GHz band */ |
| 331 | return 5000 + (chan*5); |
| 332 | } else { /* either, guess */ |
| 333 | if (chan == 14) |
| 334 | return 2484; |
| 335 | if (chan < 14) /* 0-13 */ |
| 336 | return 2407 + chan*5; |
| 337 | if (chan < 27) /* 15-26 */ |
| 338 | return 2512 + ((chan-15)*20); |
| 339 | return 5000 + (chan*5); |
| 340 | } |
| 341 | } |
| 342 | |
| 343 | /* |
| 344 | * Setup the media data structures according to the channel and |
| 345 | * rate tables. This must be called by the driver after |
| 346 | * ieee80211_attach and before most anything else. |
| 347 | */ |
| 348 | void |
| 349 | ieee80211_media_init(struct ieee80211com *ic, |
| 350 | ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) |
| 351 | { |
| 352 | #define ADD(_ic, _s, _o) \ |
| 353 | ifmedia_add(&(_ic)->ic_media, \ |
| 354 | IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL) |
| 355 | struct ifnet *ifp = ic->ic_ifp; |
| 356 | struct ifmediareq imr; |
| 357 | int i, j, mode, rate, maxrate, mword, mopt, r; |
| 358 | const struct ieee80211_rateset *rs; |
| 359 | struct ieee80211_rateset allrates; |
| 360 | |
| 361 | /* |
| 362 | * Do late attach work that must wait for any subclass |
| 363 | * (i.e. driver) work such as overriding methods. |
| 364 | */ |
| 365 | ieee80211_node_lateattach(ic); |
| 366 | |
| 367 | #ifdef IEEE80211_NO_HOSTAP |
| 368 | ic->ic_caps &= ~IEEE80211_C_HOSTAP; |
| 369 | #endif /* IEEE80211_NO_HOSTAP */ |
| 370 | |
| 371 | /* |
| 372 | * Fill in media characteristics. |
| 373 | */ |
| 374 | ifmedia_init(&ic->ic_media, 0, media_change, media_stat); |
| 375 | maxrate = 0; |
| 376 | memset(&allrates, 0, sizeof(allrates)); |
| 377 | for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_MAX; mode++) { |
| 378 | static const u_int mopts[] = { |
| 379 | IFM_AUTO, |
| 380 | IFM_IEEE80211_11A, |
| 381 | IFM_IEEE80211_11B, |
| 382 | IFM_IEEE80211_11G, |
| 383 | IFM_IEEE80211_FH, |
| 384 | IFM_IEEE80211_11A | IFM_IEEE80211_TURBO, |
| 385 | IFM_IEEE80211_11G | IFM_IEEE80211_TURBO, |
| 386 | }; |
| 387 | if ((ic->ic_modecaps & (1<<mode)) == 0) |
| 388 | continue; |
| 389 | mopt = mopts[mode]; |
| 390 | ADD(ic, IFM_AUTO, mopt); /* e.g. 11a auto */ |
| 391 | if (ic->ic_caps & IEEE80211_C_IBSS) |
| 392 | ADD(ic, IFM_AUTO, mopt | IFM_IEEE80211_ADHOC); |
| 393 | if (ic->ic_caps & IEEE80211_C_HOSTAP) |
| 394 | ADD(ic, IFM_AUTO, mopt | IFM_IEEE80211_HOSTAP); |
| 395 | if (ic->ic_caps & IEEE80211_C_AHDEMO) |
| 396 | ADD(ic, IFM_AUTO, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0); |
| 397 | if (ic->ic_caps & IEEE80211_C_MONITOR) |
| 398 | ADD(ic, IFM_AUTO, mopt | IFM_IEEE80211_MONITOR); |
| 399 | if (mode == IEEE80211_MODE_AUTO) |
| 400 | continue; |
| 401 | rs = &ic->ic_sup_rates[mode]; |
| 402 | for (i = 0; i < rs->rs_nrates; i++) { |
| 403 | rate = rs->rs_rates[i]; |
| 404 | mword = ieee80211_rate2media(ic, rate, mode); |
| 405 | if (mword == 0) |
| 406 | continue; |
| 407 | ADD(ic, mword, mopt); |
| 408 | if (ic->ic_caps & IEEE80211_C_IBSS) |
| 409 | ADD(ic, mword, mopt | IFM_IEEE80211_ADHOC); |
| 410 | if (ic->ic_caps & IEEE80211_C_HOSTAP) |
| 411 | ADD(ic, mword, mopt | IFM_IEEE80211_HOSTAP); |
| 412 | if (ic->ic_caps & IEEE80211_C_AHDEMO) |
| 413 | ADD(ic, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0); |
| 414 | if (ic->ic_caps & IEEE80211_C_MONITOR) |
| 415 | ADD(ic, mword, mopt | IFM_IEEE80211_MONITOR); |
| 416 | /* |
| 417 | * Add rate to the collection of all rates. |
| 418 | */ |
| 419 | r = rate & IEEE80211_RATE_VAL; |
| 420 | for (j = 0; j < allrates.rs_nrates; j++) |
| 421 | if (allrates.rs_rates[j] == r) |
| 422 | break; |
| 423 | if (j == allrates.rs_nrates) { |
| 424 | /* unique, add to the set */ |
| 425 | allrates.rs_rates[j] = r; |
| 426 | allrates.rs_nrates++; |
| 427 | } |
| 428 | rate = (rate & IEEE80211_RATE_VAL) / 2; |
| 429 | if (rate > maxrate) |
| 430 | maxrate = rate; |
| 431 | } |
| 432 | } |
| 433 | for (i = 0; i < allrates.rs_nrates; i++) { |
| 434 | mword = ieee80211_rate2media(ic, allrates.rs_rates[i], |
| 435 | IEEE80211_MODE_AUTO); |
| 436 | if (mword == 0) |
| 437 | continue; |
| 438 | mword = IFM_SUBTYPE(mword); /* remove media options */ |
| 439 | ADD(ic, mword, 0); |
| 440 | if (ic->ic_caps & IEEE80211_C_IBSS) |
| 441 | ADD(ic, mword, IFM_IEEE80211_ADHOC); |
| 442 | if (ic->ic_caps & IEEE80211_C_HOSTAP) |
| 443 | ADD(ic, mword, IFM_IEEE80211_HOSTAP); |
| 444 | if (ic->ic_caps & IEEE80211_C_AHDEMO) |
| 445 | ADD(ic, mword, IFM_IEEE80211_ADHOC | IFM_FLAG0); |
| 446 | if (ic->ic_caps & IEEE80211_C_MONITOR) |
| 447 | ADD(ic, mword, IFM_IEEE80211_MONITOR); |
| 448 | } |
| 449 | ieee80211_media_status(ifp, &imr); |
| 450 | ifmedia_set(&ic->ic_media, imr.ifm_active); |
| 451 | |
| 452 | if (maxrate) |
| 453 | ifp->if_baudrate = IF_Mbps(maxrate); |
| 454 | #undef ADD |
| 455 | } |
| 456 | |
| 457 | void |
| 458 | ieee80211_announce(struct ieee80211com *ic) |
| 459 | { |
| 460 | struct ifnet *ifp = ic->ic_ifp; |
| 461 | int i, mode, rate, mword; |
| 462 | struct ieee80211_rateset *rs; |
| 463 | |
| 464 | for (mode = IEEE80211_MODE_11A; mode < IEEE80211_MODE_MAX; mode++) { |
| 465 | if ((ic->ic_modecaps & (1<<mode)) == 0) |
| 466 | continue; |
| 467 | aprint_normal("%s: %s rates: " , ifp->if_xname, |
| 468 | ieee80211_phymode_name[mode]); |
| 469 | rs = &ic->ic_sup_rates[mode]; |
| 470 | for (i = 0; i < rs->rs_nrates; i++) { |
| 471 | rate = rs->rs_rates[i]; |
| 472 | mword = ieee80211_rate2media(ic, rate, mode); |
| 473 | if (mword == 0) |
| 474 | continue; |
| 475 | aprint_normal("%s%d%sMbps" , (i != 0 ? " " : "" ), |
| 476 | (rate & IEEE80211_RATE_VAL) / 2, |
| 477 | ((rate & 0x1) != 0 ? ".5" : "" )); |
| 478 | } |
| 479 | aprint_normal("\n" ); |
| 480 | } |
| 481 | } |
| 482 | |
| 483 | static int |
| 484 | findrate(struct ieee80211com *ic, enum ieee80211_phymode mode, int rate) |
| 485 | { |
| 486 | #define IEEERATE(_ic,_m,_i) \ |
| 487 | ((_ic)->ic_sup_rates[_m].rs_rates[_i] & IEEE80211_RATE_VAL) |
| 488 | int i, nrates = ic->ic_sup_rates[mode].rs_nrates; |
| 489 | for (i = 0; i < nrates; i++) |
| 490 | if (IEEERATE(ic, mode, i) == rate) |
| 491 | return i; |
| 492 | return -1; |
| 493 | #undef IEEERATE |
| 494 | } |
| 495 | |
| 496 | /* |
| 497 | * Find an instance by its mac address. |
| 498 | */ |
| 499 | struct ieee80211com * |
| 500 | ieee80211_find_vap(const u_int8_t mac[IEEE80211_ADDR_LEN]) |
| 501 | { |
| 502 | int s; |
| 503 | struct ieee80211com *ic; |
| 504 | |
| 505 | s = splnet(); |
| 506 | SLIST_FOREACH(ic, &ieee80211_list, ic_next) |
| 507 | if (IEEE80211_ADDR_EQ(mac, ic->ic_myaddr)) |
| 508 | break; |
| 509 | splx(s); |
| 510 | return ic; |
| 511 | } |
| 512 | |
| 513 | static struct ieee80211com * |
| 514 | ieee80211_find_instance(struct ifnet *ifp) |
| 515 | { |
| 516 | int s; |
| 517 | struct ieee80211com *ic; |
| 518 | |
| 519 | s = splnet(); |
| 520 | /* XXX not right for multiple instances but works for now */ |
| 521 | SLIST_FOREACH(ic, &ieee80211_list, ic_next) |
| 522 | if (ic->ic_ifp == ifp) |
| 523 | break; |
| 524 | splx(s); |
| 525 | return ic; |
| 526 | } |
| 527 | |
| 528 | /* |
| 529 | * Handle a media change request. |
| 530 | */ |
| 531 | int |
| 532 | ieee80211_media_change(struct ifnet *ifp) |
| 533 | { |
| 534 | struct ieee80211com *ic; |
| 535 | struct ifmedia_entry *ime; |
| 536 | enum ieee80211_opmode newopmode; |
| 537 | enum ieee80211_phymode newphymode; |
| 538 | int i, j, newrate, error = 0; |
| 539 | |
| 540 | ic = ieee80211_find_instance(ifp); |
| 541 | if (!ic) { |
| 542 | if_printf(ifp, "%s: no 802.11 instance!\n" , __func__); |
| 543 | return EINVAL; |
| 544 | } |
| 545 | ime = ic->ic_media.ifm_cur; |
| 546 | /* |
| 547 | * First, identify the phy mode. |
| 548 | */ |
| 549 | switch (IFM_MODE(ime->ifm_media)) { |
| 550 | case IFM_IEEE80211_11A: |
| 551 | newphymode = IEEE80211_MODE_11A; |
| 552 | break; |
| 553 | case IFM_IEEE80211_11B: |
| 554 | newphymode = IEEE80211_MODE_11B; |
| 555 | break; |
| 556 | case IFM_IEEE80211_11G: |
| 557 | newphymode = IEEE80211_MODE_11G; |
| 558 | break; |
| 559 | case IFM_IEEE80211_FH: |
| 560 | newphymode = IEEE80211_MODE_FH; |
| 561 | break; |
| 562 | case IFM_AUTO: |
| 563 | newphymode = IEEE80211_MODE_AUTO; |
| 564 | break; |
| 565 | default: |
| 566 | return EINVAL; |
| 567 | } |
| 568 | /* |
| 569 | * Turbo mode is an ``option''. |
| 570 | * XXX does not apply to AUTO |
| 571 | */ |
| 572 | if (ime->ifm_media & IFM_IEEE80211_TURBO) { |
| 573 | if (newphymode == IEEE80211_MODE_11A) |
| 574 | newphymode = IEEE80211_MODE_TURBO_A; |
| 575 | else if (newphymode == IEEE80211_MODE_11G) |
| 576 | newphymode = IEEE80211_MODE_TURBO_G; |
| 577 | else |
| 578 | return EINVAL; |
| 579 | } |
| 580 | /* |
| 581 | * Validate requested mode is available. |
| 582 | */ |
| 583 | if ((ic->ic_modecaps & (1<<newphymode)) == 0) |
| 584 | return EINVAL; |
| 585 | |
| 586 | /* |
| 587 | * Next, the fixed/variable rate. |
| 588 | */ |
| 589 | i = -1; |
| 590 | if (IFM_SUBTYPE(ime->ifm_media) != IFM_AUTO) { |
| 591 | /* |
| 592 | * Convert media subtype to rate. |
| 593 | */ |
| 594 | newrate = ieee80211_media2rate(ime->ifm_media); |
| 595 | if (newrate == 0) |
| 596 | return EINVAL; |
| 597 | /* |
| 598 | * Check the rate table for the specified/current phy. |
| 599 | */ |
| 600 | if (newphymode == IEEE80211_MODE_AUTO) { |
| 601 | /* |
| 602 | * In autoselect mode search for the rate. |
| 603 | */ |
| 604 | for (j = IEEE80211_MODE_11A; |
| 605 | j < IEEE80211_MODE_MAX; j++) { |
| 606 | if ((ic->ic_modecaps & (1<<j)) == 0) |
| 607 | continue; |
| 608 | i = findrate(ic, j, newrate); |
| 609 | if (i != -1) { |
| 610 | /* lock mode too */ |
| 611 | newphymode = j; |
| 612 | break; |
| 613 | } |
| 614 | } |
| 615 | } else { |
| 616 | i = findrate(ic, newphymode, newrate); |
| 617 | } |
| 618 | if (i == -1) /* mode/rate mismatch */ |
| 619 | return EINVAL; |
| 620 | } |
| 621 | /* NB: defer rate setting to later */ |
| 622 | |
| 623 | /* |
| 624 | * Deduce new operating mode but don't install it just yet. |
| 625 | */ |
| 626 | if ((ime->ifm_media & (IFM_IEEE80211_ADHOC|IFM_FLAG0)) == |
| 627 | (IFM_IEEE80211_ADHOC|IFM_FLAG0)) |
| 628 | newopmode = IEEE80211_M_AHDEMO; |
| 629 | else if (ime->ifm_media & IFM_IEEE80211_HOSTAP) |
| 630 | newopmode = IEEE80211_M_HOSTAP; |
| 631 | else if (ime->ifm_media & IFM_IEEE80211_ADHOC) |
| 632 | newopmode = IEEE80211_M_IBSS; |
| 633 | else if (ime->ifm_media & IFM_IEEE80211_MONITOR) |
| 634 | newopmode = IEEE80211_M_MONITOR; |
| 635 | else |
| 636 | newopmode = IEEE80211_M_STA; |
| 637 | |
| 638 | #ifndef IEEE80211_NO_HOSTAP |
| 639 | /* |
| 640 | * Autoselect doesn't make sense when operating as an AP. |
| 641 | * If no phy mode has been selected, pick one and lock it |
| 642 | * down so rate tables can be used in forming beacon frames |
| 643 | * and the like. |
| 644 | */ |
| 645 | if (newopmode == IEEE80211_M_HOSTAP && |
| 646 | newphymode == IEEE80211_MODE_AUTO) { |
| 647 | for (j = IEEE80211_MODE_11A; j < IEEE80211_MODE_MAX; j++) |
| 648 | if (ic->ic_modecaps & (1<<j)) { |
| 649 | newphymode = j; |
| 650 | break; |
| 651 | } |
| 652 | } |
| 653 | #endif /* !IEEE80211_NO_HOSTAP */ |
| 654 | |
| 655 | /* |
| 656 | * Handle phy mode change. |
| 657 | */ |
| 658 | if (ic->ic_curmode != newphymode) { /* change phy mode */ |
| 659 | error = ieee80211_setmode(ic, newphymode); |
| 660 | if (error != 0) |
| 661 | return error; |
| 662 | error = ENETRESET; |
| 663 | } |
| 664 | |
| 665 | /* |
| 666 | * Committed to changes, install the rate setting. |
| 667 | */ |
| 668 | if (ic->ic_fixed_rate != i) { |
| 669 | ic->ic_fixed_rate = i; /* set fixed tx rate */ |
| 670 | error = ENETRESET; |
| 671 | } |
| 672 | |
| 673 | /* |
| 674 | * Handle operating mode change. |
| 675 | */ |
| 676 | if (ic->ic_opmode != newopmode) { |
| 677 | ic->ic_opmode = newopmode; |
| 678 | switch (newopmode) { |
| 679 | case IEEE80211_M_AHDEMO: |
| 680 | case IEEE80211_M_HOSTAP: |
| 681 | case IEEE80211_M_STA: |
| 682 | case IEEE80211_M_MONITOR: |
| 683 | ic->ic_flags &= ~IEEE80211_F_IBSSON; |
| 684 | break; |
| 685 | case IEEE80211_M_IBSS: |
| 686 | ic->ic_flags |= IEEE80211_F_IBSSON; |
| 687 | break; |
| 688 | } |
| 689 | /* |
| 690 | * Yech, slot time may change depending on the |
| 691 | * operating mode so reset it to be sure everything |
| 692 | * is setup appropriately. |
| 693 | */ |
| 694 | ieee80211_reset_erp(ic); |
| 695 | ieee80211_wme_initparams(ic); /* after opmode change */ |
| 696 | error = ENETRESET; |
| 697 | } |
| 698 | #ifdef notdef |
| 699 | if (error == 0) |
| 700 | ifp->if_baudrate = ifmedia_baudrate(ime->ifm_media); |
| 701 | #endif |
| 702 | return error; |
| 703 | } |
| 704 | |
| 705 | void |
| 706 | ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr) |
| 707 | { |
| 708 | struct ieee80211com *ic; |
| 709 | struct ieee80211_rateset *rs; |
| 710 | |
| 711 | ic = ieee80211_find_instance(ifp); |
| 712 | if (!ic) { |
| 713 | if_printf(ifp, "%s: no 802.11 instance!\n" , __func__); |
| 714 | return; |
| 715 | } |
| 716 | imr->ifm_status = IFM_AVALID; |
| 717 | imr->ifm_active = IFM_IEEE80211; |
| 718 | if (ic->ic_state == IEEE80211_S_RUN) |
| 719 | imr->ifm_status |= IFM_ACTIVE; |
| 720 | /* |
| 721 | * Calculate a current rate if possible. |
| 722 | */ |
| 723 | if (ic->ic_fixed_rate != IEEE80211_FIXED_RATE_NONE) { |
| 724 | /* |
| 725 | * A fixed rate is set, report that. |
| 726 | */ |
| 727 | rs = &ic->ic_sup_rates[ic->ic_curmode]; |
| 728 | imr->ifm_active |= ieee80211_rate2media(ic, |
| 729 | rs->rs_rates[ic->ic_fixed_rate], ic->ic_curmode); |
| 730 | } else if (ic->ic_opmode == IEEE80211_M_STA) { |
| 731 | /* |
| 732 | * In station mode report the current transmit rate. |
| 733 | */ |
| 734 | rs = &ic->ic_bss->ni_rates; |
| 735 | imr->ifm_active |= ieee80211_rate2media(ic, |
| 736 | rs->rs_rates[ic->ic_bss->ni_txrate], ic->ic_curmode); |
| 737 | } else |
| 738 | imr->ifm_active |= IFM_AUTO; |
| 739 | switch (ic->ic_opmode) { |
| 740 | case IEEE80211_M_STA: |
| 741 | break; |
| 742 | case IEEE80211_M_IBSS: |
| 743 | imr->ifm_active |= IFM_IEEE80211_ADHOC; |
| 744 | break; |
| 745 | case IEEE80211_M_AHDEMO: |
| 746 | /* should not come here */ |
| 747 | break; |
| 748 | case IEEE80211_M_HOSTAP: |
| 749 | imr->ifm_active |= IFM_IEEE80211_HOSTAP; |
| 750 | break; |
| 751 | case IEEE80211_M_MONITOR: |
| 752 | imr->ifm_active |= IFM_IEEE80211_MONITOR; |
| 753 | break; |
| 754 | } |
| 755 | switch (ic->ic_curmode) { |
| 756 | case IEEE80211_MODE_11A: |
| 757 | imr->ifm_active |= IFM_IEEE80211_11A; |
| 758 | break; |
| 759 | case IEEE80211_MODE_11B: |
| 760 | imr->ifm_active |= IFM_IEEE80211_11B; |
| 761 | break; |
| 762 | case IEEE80211_MODE_11G: |
| 763 | imr->ifm_active |= IFM_IEEE80211_11G; |
| 764 | break; |
| 765 | case IEEE80211_MODE_FH: |
| 766 | imr->ifm_active |= IFM_IEEE80211_FH; |
| 767 | break; |
| 768 | case IEEE80211_MODE_TURBO_A: |
| 769 | imr->ifm_active |= IFM_IEEE80211_11A |
| 770 | | IFM_IEEE80211_TURBO; |
| 771 | break; |
| 772 | case IEEE80211_MODE_TURBO_G: |
| 773 | imr->ifm_active |= IFM_IEEE80211_11G |
| 774 | | IFM_IEEE80211_TURBO; |
| 775 | break; |
| 776 | } |
| 777 | } |
| 778 | |
| 779 | void |
| 780 | ieee80211_watchdog(struct ieee80211com *ic) |
| 781 | { |
| 782 | struct ieee80211_node_table *nt; |
| 783 | int need_inact_timer = 0; |
| 784 | |
| 785 | if (ic->ic_state != IEEE80211_S_INIT) { |
| 786 | if (ic->ic_mgt_timer && --ic->ic_mgt_timer == 0) |
| 787 | ieee80211_new_state(ic, IEEE80211_S_SCAN, 0); |
| 788 | nt = &ic->ic_scan; |
| 789 | if (nt->nt_inact_timer) { |
| 790 | if (--nt->nt_inact_timer == 0) |
| 791 | nt->nt_timeout(nt); |
| 792 | need_inact_timer += nt->nt_inact_timer; |
| 793 | } |
| 794 | nt = &ic->ic_sta; |
| 795 | if (nt->nt_inact_timer) { |
| 796 | if (--nt->nt_inact_timer == 0) |
| 797 | nt->nt_timeout(nt); |
| 798 | need_inact_timer += nt->nt_inact_timer; |
| 799 | } |
| 800 | } |
| 801 | if (ic->ic_mgt_timer != 0 || need_inact_timer) |
| 802 | ic->ic_ifp->if_timer = 1; |
| 803 | } |
| 804 | |
| 805 | const struct ieee80211_rateset ieee80211_std_rateset_11a = |
| 806 | { 8, { 12, 18, 24, 36, 48, 72, 96, 108 } }; |
| 807 | |
| 808 | const struct ieee80211_rateset ieee80211_std_rateset_11b = |
| 809 | { 4, { 2, 4, 11, 22 } }; |
| 810 | |
| 811 | const struct ieee80211_rateset ieee80211_std_rateset_11g = |
| 812 | { 12, { 2, 4, 11, 22, 12, 18, 24, 36, 48, 72, 96, 108 } }; |
| 813 | |
| 814 | /* |
| 815 | * Set the current phy mode and recalculate the active channel |
| 816 | * set based on the available channels for this mode. Also |
| 817 | * select a new default/current channel if the current one is |
| 818 | * inappropriate for this mode. |
| 819 | */ |
| 820 | int |
| 821 | ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode) |
| 822 | { |
| 823 | #define N(a) (sizeof(a) / sizeof(a[0])) |
| 824 | static const u_int chanflags[] = { |
| 825 | 0, /* IEEE80211_MODE_AUTO */ |
| 826 | IEEE80211_CHAN_A, /* IEEE80211_MODE_11A */ |
| 827 | IEEE80211_CHAN_B, /* IEEE80211_MODE_11B */ |
| 828 | IEEE80211_CHAN_PUREG, /* IEEE80211_MODE_11G */ |
| 829 | IEEE80211_CHAN_FHSS, /* IEEE80211_MODE_FH */ |
| 830 | IEEE80211_CHAN_T, /* IEEE80211_MODE_TURBO_A */ |
| 831 | IEEE80211_CHAN_108G, /* IEEE80211_MODE_TURBO_G */ |
| 832 | }; |
| 833 | struct ieee80211_channel *c; |
| 834 | u_int modeflags; |
| 835 | int i; |
| 836 | |
| 837 | /* validate new mode */ |
| 838 | if ((ic->ic_modecaps & (1<<mode)) == 0) { |
| 839 | IEEE80211_DPRINTF(ic, IEEE80211_MSG_ANY, |
| 840 | "%s: mode %u not supported (caps 0x%x)\n" , |
| 841 | __func__, mode, ic->ic_modecaps); |
| 842 | return EINVAL; |
| 843 | } |
| 844 | |
| 845 | /* |
| 846 | * Verify at least one channel is present in the available |
| 847 | * channel list before committing to the new mode. |
| 848 | */ |
| 849 | IASSERT(mode < N(chanflags), ("Unexpected mode %u" , mode)); |
| 850 | modeflags = chanflags[mode]; |
| 851 | for (i = 0; i <= IEEE80211_CHAN_MAX; i++) { |
| 852 | c = &ic->ic_channels[i]; |
| 853 | if (c->ic_flags == 0) |
| 854 | continue; |
| 855 | if (mode == IEEE80211_MODE_AUTO) { |
| 856 | /* ignore turbo channels for autoselect */ |
| 857 | if ((c->ic_flags & IEEE80211_CHAN_TURBO) == 0) |
| 858 | break; |
| 859 | } else { |
| 860 | if ((c->ic_flags & modeflags) == modeflags) |
| 861 | break; |
| 862 | } |
| 863 | } |
| 864 | if (i > IEEE80211_CHAN_MAX) { |
| 865 | IEEE80211_DPRINTF(ic, IEEE80211_MSG_ANY, |
| 866 | "%s: no channels found for mode %u\n" , __func__, mode); |
| 867 | return EINVAL; |
| 868 | } |
| 869 | |
| 870 | /* |
| 871 | * Calculate the active channel set. |
| 872 | */ |
| 873 | memset(ic->ic_chan_active, 0, sizeof(ic->ic_chan_active)); |
| 874 | for (i = 0; i <= IEEE80211_CHAN_MAX; i++) { |
| 875 | c = &ic->ic_channels[i]; |
| 876 | if (c->ic_flags == 0) |
| 877 | continue; |
| 878 | if (mode == IEEE80211_MODE_AUTO) { |
| 879 | /* take anything but pure turbo channels */ |
| 880 | if ((c->ic_flags & IEEE80211_CHAN_TURBO) == 0) |
| 881 | setbit(ic->ic_chan_active, i); |
| 882 | } else { |
| 883 | if ((c->ic_flags & modeflags) == modeflags) |
| 884 | setbit(ic->ic_chan_active, i); |
| 885 | } |
| 886 | } |
| 887 | /* |
| 888 | * If no current/default channel is setup or the current |
| 889 | * channel is wrong for the mode then pick the first |
| 890 | * available channel from the active list. This is likely |
| 891 | * not the right one. |
| 892 | */ |
| 893 | if (ic->ic_ibss_chan == NULL || |
| 894 | isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ic->ic_ibss_chan))) { |
| 895 | for (i = 0; i <= IEEE80211_CHAN_MAX; i++) |
| 896 | if (isset(ic->ic_chan_active, i)) { |
| 897 | ic->ic_ibss_chan = &ic->ic_channels[i]; |
| 898 | break; |
| 899 | } |
| 900 | IASSERT(ic->ic_ibss_chan != NULL && |
| 901 | isset(ic->ic_chan_active, |
| 902 | ieee80211_chan2ieee(ic, ic->ic_ibss_chan)), |
| 903 | ("Bad IBSS channel %u" , |
| 904 | ieee80211_chan2ieee(ic, ic->ic_ibss_chan))); |
| 905 | } |
| 906 | /* |
| 907 | * If the desired channel is set but no longer valid then reset it. |
| 908 | */ |
| 909 | if (ic->ic_des_chan != IEEE80211_CHAN_ANYC && |
| 910 | isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ic->ic_des_chan))) |
| 911 | ic->ic_des_chan = IEEE80211_CHAN_ANYC; |
| 912 | |
| 913 | /* |
| 914 | * Do mode-specific rate setup. |
| 915 | */ |
| 916 | if (mode == IEEE80211_MODE_11G) { |
| 917 | /* |
| 918 | * Use a mixed 11b/11g rate set. |
| 919 | */ |
| 920 | ieee80211_set11gbasicrates(&ic->ic_sup_rates[mode], |
| 921 | IEEE80211_MODE_11G); |
| 922 | } else if (mode == IEEE80211_MODE_11B) { |
| 923 | /* |
| 924 | * Force pure 11b rate set. |
| 925 | */ |
| 926 | ieee80211_set11gbasicrates(&ic->ic_sup_rates[mode], |
| 927 | IEEE80211_MODE_11B); |
| 928 | } |
| 929 | /* |
| 930 | * Setup an initial rate set according to the |
| 931 | * current/default channel selected above. This |
| 932 | * will be changed when scanning but must exist |
| 933 | * now so driver have a consistent state of ic_ibss_chan. |
| 934 | */ |
| 935 | if (ic->ic_bss) /* NB: can be called before lateattach */ |
| 936 | ic->ic_bss->ni_rates = ic->ic_sup_rates[mode]; |
| 937 | |
| 938 | ic->ic_curmode = mode; |
| 939 | ieee80211_reset_erp(ic); /* reset ERP state */ |
| 940 | ieee80211_wme_initparams(ic); /* reset WME stat */ |
| 941 | |
| 942 | return 0; |
| 943 | #undef N |
| 944 | } |
| 945 | |
| 946 | /* |
| 947 | * Return the phy mode for with the specified channel so the |
| 948 | * caller can select a rate set. This is problematic for channels |
| 949 | * where multiple operating modes are possible (e.g. 11g+11b). |
| 950 | * In those cases we defer to the current operating mode when set. |
| 951 | */ |
| 952 | enum ieee80211_phymode |
| 953 | ieee80211_chan2mode(struct ieee80211com *ic, struct ieee80211_channel *chan) |
| 954 | { |
| 955 | if (IEEE80211_IS_CHAN_T(chan)) { |
| 956 | return IEEE80211_MODE_TURBO_A; |
| 957 | } else if (IEEE80211_IS_CHAN_5GHZ(chan)) { |
| 958 | return IEEE80211_MODE_11A; |
| 959 | } else if (IEEE80211_IS_CHAN_FHSS(chan)) |
| 960 | return IEEE80211_MODE_FH; |
| 961 | else if (chan->ic_flags & (IEEE80211_CHAN_OFDM|IEEE80211_CHAN_DYN)) { |
| 962 | /* |
| 963 | * This assumes all 11g channels are also usable |
| 964 | * for 11b, which is currently true. |
| 965 | */ |
| 966 | if (ic->ic_curmode == IEEE80211_MODE_TURBO_G) |
| 967 | return IEEE80211_MODE_TURBO_G; |
| 968 | if (ic->ic_curmode == IEEE80211_MODE_11B) |
| 969 | return IEEE80211_MODE_11B; |
| 970 | return IEEE80211_MODE_11G; |
| 971 | } else |
| 972 | return IEEE80211_MODE_11B; |
| 973 | } |
| 974 | |
| 975 | /* |
| 976 | * convert IEEE80211 rate value to ifmedia subtype. |
| 977 | * ieee80211 rate is in unit of 0.5Mbps. |
| 978 | */ |
| 979 | int |
| 980 | ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode) |
| 981 | { |
| 982 | #define N(a) (sizeof(a) / sizeof(a[0])) |
| 983 | static const struct { |
| 984 | u_int m; /* rate + mode */ |
| 985 | u_int r; /* if_media rate */ |
| 986 | } rates[] = { |
| 987 | { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 }, |
| 988 | { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 }, |
| 989 | { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 }, |
| 990 | { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 }, |
| 991 | { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 }, |
| 992 | { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 }, |
| 993 | { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 }, |
| 994 | { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 }, |
| 995 | { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 }, |
| 996 | { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 }, |
| 997 | { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 }, |
| 998 | { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 }, |
| 999 | { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 }, |
| 1000 | { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 }, |
| 1001 | { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 }, |
| 1002 | { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 }, |
| 1003 | { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 }, |
| 1004 | { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 }, |
| 1005 | { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 }, |
| 1006 | { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 }, |
| 1007 | { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 }, |
| 1008 | { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 }, |
| 1009 | { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 }, |
| 1010 | { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 }, |
| 1011 | { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 }, |
| 1012 | { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 }, |
| 1013 | { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 }, |
| 1014 | /* NB: OFDM72 doesn't realy exist so we don't handle it */ |
| 1015 | }; |
| 1016 | u_int mask, i; |
| 1017 | |
| 1018 | mask = rate & IEEE80211_RATE_VAL; |
| 1019 | switch (mode) { |
| 1020 | case IEEE80211_MODE_11A: |
| 1021 | case IEEE80211_MODE_TURBO_A: |
| 1022 | mask |= IFM_IEEE80211_11A; |
| 1023 | break; |
| 1024 | case IEEE80211_MODE_11B: |
| 1025 | mask |= IFM_IEEE80211_11B; |
| 1026 | break; |
| 1027 | case IEEE80211_MODE_FH: |
| 1028 | mask |= IFM_IEEE80211_FH; |
| 1029 | break; |
| 1030 | case IEEE80211_MODE_AUTO: |
| 1031 | /* NB: ic may be NULL for some drivers */ |
| 1032 | if (ic && ic->ic_phytype == IEEE80211_T_FH) { |
| 1033 | mask |= IFM_IEEE80211_FH; |
| 1034 | break; |
| 1035 | } |
| 1036 | /* NB: hack, 11g matches both 11b+11a rates */ |
| 1037 | /* fall thru... */ |
| 1038 | case IEEE80211_MODE_11G: |
| 1039 | case IEEE80211_MODE_TURBO_G: |
| 1040 | mask |= IFM_IEEE80211_11G; |
| 1041 | break; |
| 1042 | } |
| 1043 | for (i = 0; i < N(rates); i++) |
| 1044 | if (rates[i].m == mask) |
| 1045 | return rates[i].r; |
| 1046 | return IFM_AUTO; |
| 1047 | #undef N |
| 1048 | } |
| 1049 | |
| 1050 | int |
| 1051 | ieee80211_media2rate(int mword) |
| 1052 | { |
| 1053 | #define N(a) (sizeof(a) / sizeof(a[0])) |
| 1054 | static const int ieeerates[] = { |
| 1055 | -1, /* IFM_AUTO */ |
| 1056 | 0, /* IFM_MANUAL */ |
| 1057 | 0, /* IFM_NONE */ |
| 1058 | 2, /* IFM_IEEE80211_FH1 */ |
| 1059 | 4, /* IFM_IEEE80211_FH2 */ |
| 1060 | 4, /* IFM_IEEE80211_DS2 */ |
| 1061 | 11, /* IFM_IEEE80211_DS5 */ |
| 1062 | 22, /* IFM_IEEE80211_DS11 */ |
| 1063 | 2, /* IFM_IEEE80211_DS1 */ |
| 1064 | 44, /* IFM_IEEE80211_DS22 */ |
| 1065 | 12, /* IFM_IEEE80211_OFDM6 */ |
| 1066 | 18, /* IFM_IEEE80211_OFDM9 */ |
| 1067 | 24, /* IFM_IEEE80211_OFDM12 */ |
| 1068 | 36, /* IFM_IEEE80211_OFDM18 */ |
| 1069 | 48, /* IFM_IEEE80211_OFDM24 */ |
| 1070 | 72, /* IFM_IEEE80211_OFDM36 */ |
| 1071 | 96, /* IFM_IEEE80211_OFDM48 */ |
| 1072 | 108, /* IFM_IEEE80211_OFDM54 */ |
| 1073 | 144, /* IFM_IEEE80211_OFDM72 */ |
| 1074 | }; |
| 1075 | return IFM_SUBTYPE(mword) < N(ieeerates) ? |
| 1076 | ieeerates[IFM_SUBTYPE(mword)] : 0; |
| 1077 | #undef N |
| 1078 | } |
| 1079 | |