ieee80211.c revision 186107
1/*- 2 * Copyright (c) 2001 Atsushi Onoe 3 * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD: head/sys/net80211/ieee80211.c 186107 2008-12-15 01:26:33Z sam $"); 29 30/* 31 * IEEE 802.11 generic handler 32 */ 33#include "opt_wlan.h" 34 35#include <sys/param.h> 36#include <sys/systm.h> 37#include <sys/kernel.h> 38 39#include <sys/socket.h> 40 41#include <net/if.h> 42#include <net/if_dl.h> 43#include <net/if_media.h> 44#include <net/if_types.h> 45#include <net/ethernet.h> 46 47#include <net80211/ieee80211_var.h> 48#include <net80211/ieee80211_regdomain.h> 49 50#include <net/bpf.h> 51 52const char *ieee80211_phymode_name[IEEE80211_MODE_MAX] = { 53 [IEEE80211_MODE_AUTO] = "auto", 54 [IEEE80211_MODE_11A] = "11a", 55 [IEEE80211_MODE_11B] = "11b", 56 [IEEE80211_MODE_11G] = "11g", 57 [IEEE80211_MODE_FH] = "FH", 58 [IEEE80211_MODE_TURBO_A] = "turboA", 59 [IEEE80211_MODE_TURBO_G] = "turboG", 60 [IEEE80211_MODE_STURBO_A] = "sturboA", 61 [IEEE80211_MODE_11NA] = "11na", 62 [IEEE80211_MODE_11NG] = "11ng", 63}; 64/* map ieee80211_opmode to the corresponding capability bit */ 65const int ieee80211_opcap[IEEE80211_OPMODE_MAX] = { 66 [IEEE80211_M_IBSS] = IEEE80211_C_IBSS, 67 [IEEE80211_M_WDS] = IEEE80211_C_WDS, 68 [IEEE80211_M_STA] = IEEE80211_C_STA, 69 [IEEE80211_M_AHDEMO] = IEEE80211_C_AHDEMO, 70 [IEEE80211_M_HOSTAP] = IEEE80211_C_HOSTAP, 71 [IEEE80211_M_MONITOR] = IEEE80211_C_MONITOR, 72}; 73 74static const uint8_t ieee80211broadcastaddr[IEEE80211_ADDR_LEN] = 75 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 76 77static void ieee80211_syncflag_locked(struct ieee80211com *ic, int flag); 78static void ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag); 79static int ieee80211_media_setup(struct ieee80211com *ic, 80 struct ifmedia *media, int caps, int addsta, 81 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat); 82static void ieee80211com_media_status(struct ifnet *, struct ifmediareq *); 83static int ieee80211com_media_change(struct ifnet *); 84static int media_status(enum ieee80211_opmode, 85 const struct ieee80211_channel *); 86 87MALLOC_DEFINE(M_80211_VAP, "80211vap", "802.11 vap state"); 88 89/* 90 * Default supported rates for 802.11 operation (in IEEE .5Mb units). 91 */ 92#define B(r) ((r) | IEEE80211_RATE_BASIC) 93static const struct ieee80211_rateset ieee80211_rateset_11a = 94 { 8, { B(12), 18, B(24), 36, B(48), 72, 96, 108 } }; 95static const struct ieee80211_rateset ieee80211_rateset_half = 96 { 8, { B(6), 9, B(12), 18, B(24), 36, 48, 54 } }; 97static const struct ieee80211_rateset ieee80211_rateset_quarter = 98 { 8, { B(3), 4, B(6), 9, B(12), 18, 24, 27 } }; 99static const struct ieee80211_rateset ieee80211_rateset_11b = 100 { 4, { B(2), B(4), B(11), B(22) } }; 101/* NB: OFDM rates are handled specially based on mode */ 102static const struct ieee80211_rateset ieee80211_rateset_11g = 103 { 12, { B(2), B(4), B(11), B(22), 12, 18, 24, 36, 48, 72, 96, 108 } }; 104#undef B 105 106/* 107 * Fill in 802.11 available channel set, mark 108 * all available channels as active, and pick 109 * a default channel if not already specified. 110 */ 111static void 112ieee80211_chan_init(struct ieee80211com *ic) 113{ 114#define DEFAULTRATES(m, def) do { \ 115 if (isset(ic->ic_modecaps, m) && ic->ic_sup_rates[m].rs_nrates == 0) \ 116 ic->ic_sup_rates[m] = def; \ 117} while (0) 118 struct ieee80211_channel *c; 119 int i; 120 121 KASSERT(0 < ic->ic_nchans && ic->ic_nchans <= IEEE80211_CHAN_MAX, 122 ("invalid number of channels specified: %u", ic->ic_nchans)); 123 memset(ic->ic_chan_avail, 0, sizeof(ic->ic_chan_avail)); 124 memset(ic->ic_modecaps, 0, sizeof(ic->ic_modecaps)); 125 setbit(ic->ic_modecaps, IEEE80211_MODE_AUTO); 126 for (i = 0; i < ic->ic_nchans; i++) { 127 c = &ic->ic_channels[i]; 128 KASSERT(c->ic_flags != 0, ("channel with no flags")); 129 setbit(ic->ic_chan_avail, c->ic_ieee); 130 /* 131 * Identify mode capabilities. 132 */ 133 if (IEEE80211_IS_CHAN_A(c)) 134 setbit(ic->ic_modecaps, IEEE80211_MODE_11A); 135 if (IEEE80211_IS_CHAN_B(c)) 136 setbit(ic->ic_modecaps, IEEE80211_MODE_11B); 137 if (IEEE80211_IS_CHAN_ANYG(c)) 138 setbit(ic->ic_modecaps, IEEE80211_MODE_11G); 139 if (IEEE80211_IS_CHAN_FHSS(c)) 140 setbit(ic->ic_modecaps, IEEE80211_MODE_FH); 141 if (IEEE80211_IS_CHAN_108A(c)) 142 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_A); 143 if (IEEE80211_IS_CHAN_108G(c)) 144 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_G); 145 if (IEEE80211_IS_CHAN_ST(c)) 146 setbit(ic->ic_modecaps, IEEE80211_MODE_STURBO_A); 147 if (IEEE80211_IS_CHAN_HTA(c)) 148 setbit(ic->ic_modecaps, IEEE80211_MODE_11NA); 149 if (IEEE80211_IS_CHAN_HTG(c)) 150 setbit(ic->ic_modecaps, IEEE80211_MODE_11NG); 151 } 152 /* initialize candidate channels to all available */ 153 memcpy(ic->ic_chan_active, ic->ic_chan_avail, 154 sizeof(ic->ic_chan_avail)); 155 156 /* sort channel table to allow lookup optimizations */ 157 ieee80211_sort_channels(ic->ic_channels, ic->ic_nchans); 158 159 /* invalidate any previous state */ 160 ic->ic_bsschan = IEEE80211_CHAN_ANYC; 161 ic->ic_prevchan = NULL; 162 ic->ic_csa_newchan = NULL; 163 /* arbitrarily pick the first channel */ 164 ic->ic_curchan = &ic->ic_channels[0]; 165 166 /* fillin well-known rate sets if driver has not specified */ 167 DEFAULTRATES(IEEE80211_MODE_11B, ieee80211_rateset_11b); 168 DEFAULTRATES(IEEE80211_MODE_11G, ieee80211_rateset_11g); 169 DEFAULTRATES(IEEE80211_MODE_11A, ieee80211_rateset_11a); 170 DEFAULTRATES(IEEE80211_MODE_TURBO_A, ieee80211_rateset_11a); 171 DEFAULTRATES(IEEE80211_MODE_TURBO_G, ieee80211_rateset_11g); 172 173 /* 174 * Set auto mode to reset active channel state and any desired channel. 175 */ 176 (void) ieee80211_setmode(ic, IEEE80211_MODE_AUTO); 177#undef DEFAULTRATES 178} 179 180static void 181null_update_mcast(struct ifnet *ifp) 182{ 183 if_printf(ifp, "need multicast update callback\n"); 184} 185 186static void 187null_update_promisc(struct ifnet *ifp) 188{ 189 if_printf(ifp, "need promiscuous mode update callback\n"); 190} 191 192static int 193null_output(struct ifnet *ifp, struct mbuf *m, 194 struct sockaddr *dst, struct rtentry *rt0) 195{ 196 if_printf(ifp, "discard raw packet\n"); 197 m_freem(m); 198 return EIO; 199} 200 201static void 202null_input(struct ifnet *ifp, struct mbuf *m) 203{ 204 if_printf(ifp, "if_input should not be called\n"); 205 m_freem(m); 206} 207 208/* 209 * Attach/setup the common net80211 state. Called by 210 * the driver on attach to prior to creating any vap's. 211 */ 212void 213ieee80211_ifattach(struct ieee80211com *ic) 214{ 215 struct ifnet *ifp = ic->ic_ifp; 216 struct sockaddr_dl *sdl; 217 struct ifaddr *ifa; 218 219 KASSERT(ifp->if_type == IFT_IEEE80211, ("if_type %d", ifp->if_type)); 220 221 IEEE80211_LOCK_INIT(ic, ifp->if_xname); 222 TAILQ_INIT(&ic->ic_vaps); 223 /* 224 * Fill in 802.11 available channel set, mark all 225 * available channels as active, and pick a default 226 * channel if not already specified. 227 */ 228 ieee80211_media_init(ic); 229 230 ic->ic_update_mcast = null_update_mcast; 231 ic->ic_update_promisc = null_update_promisc; 232 233 ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT; 234 ic->ic_lintval = ic->ic_bintval; 235 ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX; 236 237 ieee80211_crypto_attach(ic); 238 ieee80211_node_attach(ic); 239 ieee80211_power_attach(ic); 240 ieee80211_proto_attach(ic); 241 ieee80211_ht_attach(ic); 242 ieee80211_scan_attach(ic); 243 ieee80211_regdomain_attach(ic); 244 245 ieee80211_sysctl_attach(ic); 246 247 ifp->if_addrlen = IEEE80211_ADDR_LEN; 248 ifp->if_hdrlen = 0; 249 if_attach(ifp); 250 ifp->if_mtu = IEEE80211_MTU_MAX; 251 ifp->if_broadcastaddr = ieee80211broadcastaddr; 252 ifp->if_output = null_output; 253 ifp->if_input = null_input; /* just in case */ 254 ifp->if_resolvemulti = NULL; /* NB: callers check */ 255 256 ifa = ifaddr_byindex(ifp->if_index); 257 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); 258 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 259 sdl->sdl_type = IFT_ETHER; /* XXX IFT_IEEE80211? */ 260 sdl->sdl_alen = IEEE80211_ADDR_LEN; 261 IEEE80211_ADDR_COPY(LLADDR(sdl), ic->ic_myaddr); 262} 263 264/* 265 * Detach net80211 state on device detach. Tear down 266 * all vap's and reclaim all common state prior to the 267 * device state going away. Note we may call back into 268 * driver; it must be prepared for this. 269 */ 270void 271ieee80211_ifdetach(struct ieee80211com *ic) 272{ 273 struct ifnet *ifp = ic->ic_ifp; 274 struct ieee80211vap *vap; 275 276 /* XXX ieee80211_stop_all? */ 277 while ((vap = TAILQ_FIRST(&ic->ic_vaps)) != NULL) 278 ieee80211_vap_destroy(vap); 279 280 ieee80211_sysctl_detach(ic); 281 ieee80211_regdomain_detach(ic); 282 ieee80211_scan_detach(ic); 283 ieee80211_ht_detach(ic); 284 /* NB: must be called before ieee80211_node_detach */ 285 ieee80211_proto_detach(ic); 286 ieee80211_crypto_detach(ic); 287 ieee80211_power_detach(ic); 288 ieee80211_node_detach(ic); 289 ifmedia_removeall(&ic->ic_media); 290 291 IEEE80211_LOCK_DESTROY(ic); 292 if_detach(ifp); 293} 294 295/* 296 * Default reset method for use with the ioctl support. This 297 * method is invoked after any state change in the 802.11 298 * layer that should be propagated to the hardware but not 299 * require re-initialization of the 802.11 state machine (e.g 300 * rescanning for an ap). We always return ENETRESET which 301 * should cause the driver to re-initialize the device. Drivers 302 * can override this method to implement more optimized support. 303 */ 304static int 305default_reset(struct ieee80211vap *vap, u_long cmd) 306{ 307 return ENETRESET; 308} 309 310/* 311 * Prepare a vap for use. Drivers use this call to 312 * setup net80211 state in new vap's prior attaching 313 * them with ieee80211_vap_attach (below). 314 */ 315int 316ieee80211_vap_setup(struct ieee80211com *ic, struct ieee80211vap *vap, 317 const char name[IFNAMSIZ], int unit, int opmode, int flags, 318 const uint8_t bssid[IEEE80211_ADDR_LEN], 319 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 320{ 321 struct ifnet *ifp; 322 323 ifp = if_alloc(IFT_ETHER); 324 if (ifp == NULL) { 325 if_printf(ic->ic_ifp, "%s: unable to allocate ifnet\n", 326 __func__); 327 return ENOMEM; 328 } 329 if_initname(ifp, name, unit); 330 ifp->if_softc = vap; /* back pointer */ 331 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 332 ifp->if_start = ieee80211_start; 333 ifp->if_ioctl = ieee80211_ioctl; 334 ifp->if_watchdog = NULL; /* NB: no watchdog routine */ 335 ifp->if_init = ieee80211_init; 336 /* NB: input+output filled in by ether_ifattach */ 337 IFQ_SET_MAXLEN(&ifp->if_snd, IFQ_MAXLEN); 338 ifp->if_snd.ifq_drv_maxlen = IFQ_MAXLEN; 339 IFQ_SET_READY(&ifp->if_snd); 340 341 vap->iv_ifp = ifp; 342 vap->iv_ic = ic; 343 vap->iv_flags = ic->ic_flags; /* propagate common flags */ 344 vap->iv_flags_ext = ic->ic_flags_ext; 345 vap->iv_flags_ven = ic->ic_flags_ven; 346 vap->iv_caps = ic->ic_caps &~ IEEE80211_C_OPMODE; 347 vap->iv_htcaps = ic->ic_htcaps; 348 vap->iv_opmode = opmode; 349 vap->iv_caps |= ieee80211_opcap[opmode]; 350 switch (opmode) { 351 case IEEE80211_M_WDS: 352 /* 353 * WDS links must specify the bssid of the far end. 354 * For legacy operation this is a static relationship. 355 * For non-legacy operation the station must associate 356 * and be authorized to pass traffic. Plumbing the 357 * vap to the proper node happens when the vap 358 * transitions to RUN state. 359 */ 360 IEEE80211_ADDR_COPY(vap->iv_des_bssid, bssid); 361 vap->iv_flags |= IEEE80211_F_DESBSSID; 362 if (flags & IEEE80211_CLONE_WDSLEGACY) 363 vap->iv_flags_ext |= IEEE80211_FEXT_WDSLEGACY; 364 break; 365 } 366 /* auto-enable s/w beacon miss support */ 367 if (flags & IEEE80211_CLONE_NOBEACONS) 368 vap->iv_flags_ext |= IEEE80211_FEXT_SWBMISS; 369 /* 370 * Enable various functionality by default if we're 371 * capable; the driver can override us if it knows better. 372 */ 373 if (vap->iv_caps & IEEE80211_C_WME) 374 vap->iv_flags |= IEEE80211_F_WME; 375 if (vap->iv_caps & IEEE80211_C_BURST) 376 vap->iv_flags |= IEEE80211_F_BURST; 377 if (vap->iv_caps & IEEE80211_C_FF) 378 vap->iv_flags |= IEEE80211_F_FF; 379 if (vap->iv_caps & IEEE80211_C_TURBOP) 380 vap->iv_flags |= IEEE80211_F_TURBOP; 381 /* NB: bg scanning only makes sense for station mode right now */ 382 if (vap->iv_opmode == IEEE80211_M_STA && 383 (vap->iv_caps & IEEE80211_C_BGSCAN)) 384 vap->iv_flags |= IEEE80211_F_BGSCAN; 385 vap->iv_flags |= IEEE80211_F_DOTH; /* XXX no cap, just ena */ 386 /* NB: DFS support only makes sense for ap mode right now */ 387 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 388 (vap->iv_caps & IEEE80211_C_DFS)) 389 vap->iv_flags_ext |= IEEE80211_FEXT_DFS; 390 391 vap->iv_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */ 392 vap->iv_bmissthreshold = IEEE80211_HWBMISS_DEFAULT; 393 vap->iv_dtim_period = IEEE80211_DTIM_DEFAULT; 394 /* 395 * Install a default reset method for the ioctl support; 396 * the driver can override this. 397 */ 398 vap->iv_reset = default_reset; 399 400 IEEE80211_ADDR_COPY(vap->iv_myaddr, macaddr); 401 402 ieee80211_sysctl_vattach(vap); 403 ieee80211_crypto_vattach(vap); 404 ieee80211_node_vattach(vap); 405 ieee80211_power_vattach(vap); 406 ieee80211_proto_vattach(vap); 407 ieee80211_ht_vattach(vap); 408 ieee80211_scan_vattach(vap); 409 ieee80211_regdomain_vattach(vap); 410 411 return 0; 412} 413 414/* 415 * Activate a vap. State should have been prepared with a 416 * call to ieee80211_vap_setup and by the driver. On return 417 * from this call the vap is ready for use. 418 */ 419int 420ieee80211_vap_attach(struct ieee80211vap *vap, 421 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) 422{ 423 struct ifnet *ifp = vap->iv_ifp; 424 struct ieee80211com *ic = vap->iv_ic; 425 struct ifmediareq imr; 426 int maxrate; 427 428 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 429 "%s: %s parent %s flags 0x%x flags_ext 0x%x\n", 430 __func__, ieee80211_opmode_name[vap->iv_opmode], 431 ic->ic_ifp->if_xname, vap->iv_flags, vap->iv_flags_ext); 432 433 /* 434 * Do late attach work that cannot happen until after 435 * the driver has had a chance to override defaults. 436 */ 437 ieee80211_node_latevattach(vap); 438 ieee80211_power_latevattach(vap); 439 440 maxrate = ieee80211_media_setup(ic, &vap->iv_media, vap->iv_caps, 441 vap->iv_opmode == IEEE80211_M_STA, media_change, media_stat); 442 ieee80211_media_status(ifp, &imr); 443 /* NB: strip explicit mode; we're actually in autoselect */ 444 ifmedia_set(&vap->iv_media, imr.ifm_active &~ IFM_MMASK); 445 if (maxrate) 446 ifp->if_baudrate = IF_Mbps(maxrate); 447 448 ether_ifattach(ifp, vap->iv_myaddr); 449 /* hook output method setup by ether_ifattach */ 450 vap->iv_output = ifp->if_output; 451 ifp->if_output = ieee80211_output; 452 /* NB: if_mtu set by ether_ifattach to ETHERMTU */ 453 bpfattach2(ifp, DLT_IEEE802_11, ifp->if_hdrlen, &vap->iv_rawbpf); 454 455 IEEE80211_LOCK(ic); 456 TAILQ_INSERT_TAIL(&ic->ic_vaps, vap, iv_next); 457 ieee80211_syncflag_locked(ic, IEEE80211_F_WME); 458 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); 459 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); 460 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); 461 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_HT); 462 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_USEHT40); 463 ieee80211_syncifflag_locked(ic, IFF_PROMISC); 464 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI); 465 IEEE80211_UNLOCK(ic); 466 467 return 1; 468} 469 470/* 471 * Tear down vap state and reclaim the ifnet. 472 * The driver is assumed to have prepared for 473 * this; e.g. by turning off interrupts for the 474 * underlying device. 475 */ 476void 477ieee80211_vap_detach(struct ieee80211vap *vap) 478{ 479 struct ieee80211com *ic = vap->iv_ic; 480 struct ifnet *ifp = vap->iv_ifp; 481 482 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s parent %s\n", 483 __func__, ieee80211_opmode_name[vap->iv_opmode], 484 ic->ic_ifp->if_xname); 485 486 IEEE80211_LOCK(ic); 487 /* block traffic from above */ 488 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 489 /* 490 * Evil hack. Clear the backpointer from the ifnet to the 491 * vap so any requests from above will return an error or 492 * be ignored. In particular this short-circuits requests 493 * by the bridge to turn off promiscuous mode as a result 494 * of calling ether_ifdetach. 495 */ 496 ifp->if_softc = NULL; 497 /* 498 * Stop the vap before detaching the ifnet. Ideally we'd 499 * do this in the other order so the ifnet is inaccessible 500 * while we cleanup internal state but that is hard. 501 */ 502 ieee80211_stop_locked(vap); 503 504 /* XXX accumulate iv_stats in ic_stats? */ 505 TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next); 506 ieee80211_syncflag_locked(ic, IEEE80211_F_WME); 507 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); 508 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); 509 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); 510 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_HT); 511 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_USEHT40); 512 ieee80211_syncifflag_locked(ic, IFF_PROMISC); 513 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI); 514 IEEE80211_UNLOCK(ic); 515 516 /* XXX can't hold com lock */ 517 /* NB: bpfattach is called by ether_ifdetach and claims all taps */ 518 ether_ifdetach(ifp); 519 520 ifmedia_removeall(&vap->iv_media); 521 522 ieee80211_regdomain_vdetach(vap); 523 ieee80211_scan_vdetach(vap); 524 ieee80211_ht_vdetach(vap); 525 /* NB: must be before ieee80211_node_vdetach */ 526 ieee80211_proto_vdetach(vap); 527 ieee80211_crypto_vdetach(vap); 528 ieee80211_power_vdetach(vap); 529 ieee80211_node_vdetach(vap); 530 ieee80211_sysctl_vdetach(vap); 531 532 if_free(ifp); 533} 534 535/* 536 * Synchronize flag bit state in the parent ifnet structure 537 * according to the state of all vap ifnet's. This is used, 538 * for example, to handle IFF_PROMISC and IFF_ALLMULTI. 539 */ 540void 541ieee80211_syncifflag_locked(struct ieee80211com *ic, int flag) 542{ 543 struct ifnet *ifp = ic->ic_ifp; 544 struct ieee80211vap *vap; 545 int bit, oflags; 546 547 IEEE80211_LOCK_ASSERT(ic); 548 549 bit = 0; 550 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 551 if (vap->iv_ifp->if_flags & flag) { 552 /* 553 * XXX the bridge sets PROMISC but we don't want to 554 * enable it on the device, discard here so all the 555 * drivers don't need to special-case it 556 */ 557 if (flag == IFF_PROMISC && 558 vap->iv_opmode == IEEE80211_M_HOSTAP) 559 continue; 560 bit = 1; 561 break; 562 } 563 oflags = ifp->if_flags; 564 if (bit) 565 ifp->if_flags |= flag; 566 else 567 ifp->if_flags &= ~flag; 568 if ((ifp->if_flags ^ oflags) & flag) { 569 /* XXX should we return 1/0 and let caller do this? */ 570 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 571 if (flag == IFF_PROMISC) 572 ic->ic_update_promisc(ifp); 573 else if (flag == IFF_ALLMULTI) 574 ic->ic_update_mcast(ifp); 575 } 576 } 577} 578 579/* 580 * Synchronize flag bit state in the com structure 581 * according to the state of all vap's. This is used, 582 * for example, to handle state changes via ioctls. 583 */ 584static void 585ieee80211_syncflag_locked(struct ieee80211com *ic, int flag) 586{ 587 struct ieee80211vap *vap; 588 int bit; 589 590 IEEE80211_LOCK_ASSERT(ic); 591 592 bit = 0; 593 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 594 if (vap->iv_flags & flag) { 595 bit = 1; 596 break; 597 } 598 if (bit) 599 ic->ic_flags |= flag; 600 else 601 ic->ic_flags &= ~flag; 602} 603 604void 605ieee80211_syncflag(struct ieee80211vap *vap, int flag) 606{ 607 struct ieee80211com *ic = vap->iv_ic; 608 609 IEEE80211_LOCK(ic); 610 if (flag < 0) { 611 flag = -flag; 612 vap->iv_flags &= ~flag; 613 } else 614 vap->iv_flags |= flag; 615 ieee80211_syncflag_locked(ic, flag); 616 IEEE80211_UNLOCK(ic); 617} 618 619/* 620 * Synchronize flag bit state in the com structure 621 * according to the state of all vap's. This is used, 622 * for example, to handle state changes via ioctls. 623 */ 624static void 625ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag) 626{ 627 struct ieee80211vap *vap; 628 int bit; 629 630 IEEE80211_LOCK_ASSERT(ic); 631 632 bit = 0; 633 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 634 if (vap->iv_flags_ext & flag) { 635 bit = 1; 636 break; 637 } 638 if (bit) 639 ic->ic_flags_ext |= flag; 640 else 641 ic->ic_flags_ext &= ~flag; 642} 643 644void 645ieee80211_syncflag_ext(struct ieee80211vap *vap, int flag) 646{ 647 struct ieee80211com *ic = vap->iv_ic; 648 649 IEEE80211_LOCK(ic); 650 if (flag < 0) { 651 flag = -flag; 652 vap->iv_flags_ext &= ~flag; 653 } else 654 vap->iv_flags_ext |= flag; 655 ieee80211_syncflag_ext_locked(ic, flag); 656 IEEE80211_UNLOCK(ic); 657} 658 659static __inline int 660mapgsm(u_int freq, u_int flags) 661{ 662 freq *= 10; 663 if (flags & IEEE80211_CHAN_QUARTER) 664 freq += 5; 665 else if (flags & IEEE80211_CHAN_HALF) 666 freq += 10; 667 else 668 freq += 20; 669 /* NB: there is no 907/20 wide but leave room */ 670 return (freq - 906*10) / 5; 671} 672 673static __inline int 674mappsb(u_int freq, u_int flags) 675{ 676 return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5; 677} 678 679/* 680 * Convert MHz frequency to IEEE channel number. 681 */ 682int 683ieee80211_mhz2ieee(u_int freq, u_int flags) 684{ 685#define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990) 686 if (flags & IEEE80211_CHAN_GSM) 687 return mapgsm(freq, flags); 688 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 689 if (freq == 2484) 690 return 14; 691 if (freq < 2484) 692 return ((int) freq - 2407) / 5; 693 else 694 return 15 + ((freq - 2512) / 20); 695 } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */ 696 if (freq <= 5000) { 697 /* XXX check regdomain? */ 698 if (IS_FREQ_IN_PSB(freq)) 699 return mappsb(freq, flags); 700 return (freq - 4000) / 5; 701 } else 702 return (freq - 5000) / 5; 703 } else { /* either, guess */ 704 if (freq == 2484) 705 return 14; 706 if (freq < 2484) { 707 if (907 <= freq && freq <= 922) 708 return mapgsm(freq, flags); 709 return ((int) freq - 2407) / 5; 710 } 711 if (freq < 5000) { 712 if (IS_FREQ_IN_PSB(freq)) 713 return mappsb(freq, flags); 714 else if (freq > 4900) 715 return (freq - 4000) / 5; 716 else 717 return 15 + ((freq - 2512) / 20); 718 } 719 return (freq - 5000) / 5; 720 } 721#undef IS_FREQ_IN_PSB 722} 723 724/* 725 * Convert channel to IEEE channel number. 726 */ 727int 728ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c) 729{ 730 if (c == NULL) { 731 if_printf(ic->ic_ifp, "invalid channel (NULL)\n"); 732 return 0; /* XXX */ 733 } 734 return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee); 735} 736 737/* 738 * Convert IEEE channel number to MHz frequency. 739 */ 740u_int 741ieee80211_ieee2mhz(u_int chan, u_int flags) 742{ 743 if (flags & IEEE80211_CHAN_GSM) 744 return 907 + 5 * (chan / 10); 745 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 746 if (chan == 14) 747 return 2484; 748 if (chan < 14) 749 return 2407 + chan*5; 750 else 751 return 2512 + ((chan-15)*20); 752 } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */ 753 if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) { 754 chan -= 37; 755 return 4940 + chan*5 + (chan % 5 ? 2 : 0); 756 } 757 return 5000 + (chan*5); 758 } else { /* either, guess */ 759 /* XXX can't distinguish PSB+GSM channels */ 760 if (chan == 14) 761 return 2484; 762 if (chan < 14) /* 0-13 */ 763 return 2407 + chan*5; 764 if (chan < 27) /* 15-26 */ 765 return 2512 + ((chan-15)*20); 766 return 5000 + (chan*5); 767 } 768} 769 770/* 771 * Locate a channel given a frequency+flags. We cache 772 * the previous lookup to optimize switching between two 773 * channels--as happens with dynamic turbo. 774 */ 775struct ieee80211_channel * 776ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags) 777{ 778 struct ieee80211_channel *c; 779 int i; 780 781 flags &= IEEE80211_CHAN_ALLTURBO; 782 c = ic->ic_prevchan; 783 if (c != NULL && c->ic_freq == freq && 784 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 785 return c; 786 /* brute force search */ 787 for (i = 0; i < ic->ic_nchans; i++) { 788 c = &ic->ic_channels[i]; 789 if (c->ic_freq == freq && 790 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 791 return c; 792 } 793 return NULL; 794} 795 796/* 797 * Locate a channel given a channel number+flags. We cache 798 * the previous lookup to optimize switching between two 799 * channels--as happens with dynamic turbo. 800 */ 801struct ieee80211_channel * 802ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags) 803{ 804 struct ieee80211_channel *c; 805 int i; 806 807 flags &= IEEE80211_CHAN_ALLTURBO; 808 c = ic->ic_prevchan; 809 if (c != NULL && c->ic_ieee == ieee && 810 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 811 return c; 812 /* brute force search */ 813 for (i = 0; i < ic->ic_nchans; i++) { 814 c = &ic->ic_channels[i]; 815 if (c->ic_ieee == ieee && 816 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 817 return c; 818 } 819 return NULL; 820} 821 822static void 823addmedia(struct ifmedia *media, int caps, int addsta, int mode, int mword) 824{ 825#define ADD(_ic, _s, _o) \ 826 ifmedia_add(media, \ 827 IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL) 828 static const u_int mopts[IEEE80211_MODE_MAX] = { 829 IFM_AUTO, 830 IFM_IEEE80211_11A, 831 IFM_IEEE80211_11B, 832 IFM_IEEE80211_11G, 833 IFM_IEEE80211_FH, 834 IFM_IEEE80211_11A | IFM_IEEE80211_TURBO, 835 IFM_IEEE80211_11G | IFM_IEEE80211_TURBO, 836 IFM_IEEE80211_11A | IFM_IEEE80211_TURBO, 837 IFM_IEEE80211_11NA, 838 IFM_IEEE80211_11NG, 839 }; 840 u_int mopt; 841 842 mopt = mopts[mode]; 843 if (addsta) 844 ADD(ic, mword, mopt); /* STA mode has no cap */ 845 if (caps & IEEE80211_C_IBSS) 846 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC); 847 if (caps & IEEE80211_C_HOSTAP) 848 ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP); 849 if (caps & IEEE80211_C_AHDEMO) 850 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0); 851 if (caps & IEEE80211_C_MONITOR) 852 ADD(media, mword, mopt | IFM_IEEE80211_MONITOR); 853 if (caps & IEEE80211_C_WDS) 854 ADD(media, mword, mopt | IFM_IEEE80211_WDS); 855#undef ADD 856} 857 858/* 859 * Setup the media data structures according to the channel and 860 * rate tables. 861 */ 862static int 863ieee80211_media_setup(struct ieee80211com *ic, 864 struct ifmedia *media, int caps, int addsta, 865 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) 866{ 867 int i, j, mode, rate, maxrate, mword, r; 868 const struct ieee80211_rateset *rs; 869 struct ieee80211_rateset allrates; 870 871 /* 872 * Fill in media characteristics. 873 */ 874 ifmedia_init(media, 0, media_change, media_stat); 875 maxrate = 0; 876 /* 877 * Add media for legacy operating modes. 878 */ 879 memset(&allrates, 0, sizeof(allrates)); 880 for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) { 881 if (isclr(ic->ic_modecaps, mode)) 882 continue; 883 addmedia(media, caps, addsta, mode, IFM_AUTO); 884 if (mode == IEEE80211_MODE_AUTO) 885 continue; 886 rs = &ic->ic_sup_rates[mode]; 887 for (i = 0; i < rs->rs_nrates; i++) { 888 rate = rs->rs_rates[i]; 889 mword = ieee80211_rate2media(ic, rate, mode); 890 if (mword == 0) 891 continue; 892 addmedia(media, caps, addsta, mode, mword); 893 /* 894 * Add legacy rate to the collection of all rates. 895 */ 896 r = rate & IEEE80211_RATE_VAL; 897 for (j = 0; j < allrates.rs_nrates; j++) 898 if (allrates.rs_rates[j] == r) 899 break; 900 if (j == allrates.rs_nrates) { 901 /* unique, add to the set */ 902 allrates.rs_rates[j] = r; 903 allrates.rs_nrates++; 904 } 905 rate = (rate & IEEE80211_RATE_VAL) / 2; 906 if (rate > maxrate) 907 maxrate = rate; 908 } 909 } 910 for (i = 0; i < allrates.rs_nrates; i++) { 911 mword = ieee80211_rate2media(ic, allrates.rs_rates[i], 912 IEEE80211_MODE_AUTO); 913 if (mword == 0) 914 continue; 915 /* NB: remove media options from mword */ 916 addmedia(media, caps, addsta, 917 IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword)); 918 } 919 /* 920 * Add HT/11n media. Note that we do not have enough 921 * bits in the media subtype to express the MCS so we 922 * use a "placeholder" media subtype and any fixed MCS 923 * must be specified with a different mechanism. 924 */ 925 for (; mode < IEEE80211_MODE_MAX; mode++) { 926 if (isclr(ic->ic_modecaps, mode)) 927 continue; 928 addmedia(media, caps, addsta, mode, IFM_AUTO); 929 addmedia(media, caps, addsta, mode, IFM_IEEE80211_MCS); 930 } 931 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) || 932 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) { 933 addmedia(media, caps, addsta, 934 IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS); 935 /* XXX could walk htrates */ 936 /* XXX known array size */ 937 if (ieee80211_htrates[15].ht40_rate_400ns > maxrate) 938 maxrate = ieee80211_htrates[15].ht40_rate_400ns; 939 } 940 return maxrate; 941} 942 943void 944ieee80211_media_init(struct ieee80211com *ic) 945{ 946 struct ifnet *ifp = ic->ic_ifp; 947 int maxrate; 948 949 /* NB: this works because the structure is initialized to zero */ 950 if (!LIST_EMPTY(&ic->ic_media.ifm_list)) { 951 /* 952 * We are re-initializing the channel list; clear 953 * the existing media state as the media routines 954 * don't suppress duplicates. 955 */ 956 ifmedia_removeall(&ic->ic_media); 957 } 958 ieee80211_chan_init(ic); 959 960 /* 961 * Recalculate media settings in case new channel list changes 962 * the set of available modes. 963 */ 964 maxrate = ieee80211_media_setup(ic, &ic->ic_media, ic->ic_caps, 1, 965 ieee80211com_media_change, ieee80211com_media_status); 966 /* NB: strip explicit mode; we're actually in autoselect */ 967 ifmedia_set(&ic->ic_media, 968 media_status(ic->ic_opmode, ic->ic_curchan) &~ IFM_MMASK); 969 if (maxrate) 970 ifp->if_baudrate = IF_Mbps(maxrate); 971 972 /* XXX need to propagate new media settings to vap's */ 973} 974 975const struct ieee80211_rateset * 976ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c) 977{ 978 if (IEEE80211_IS_CHAN_HALF(c)) 979 return &ieee80211_rateset_half; 980 if (IEEE80211_IS_CHAN_QUARTER(c)) 981 return &ieee80211_rateset_quarter; 982 if (IEEE80211_IS_CHAN_HTA(c)) 983 return &ic->ic_sup_rates[IEEE80211_MODE_11A]; 984 if (IEEE80211_IS_CHAN_HTG(c)) { 985 /* XXX does this work for basic rates? */ 986 return &ic->ic_sup_rates[IEEE80211_MODE_11G]; 987 } 988 return &ic->ic_sup_rates[ieee80211_chan2mode(c)]; 989} 990 991void 992ieee80211_announce(struct ieee80211com *ic) 993{ 994 struct ifnet *ifp = ic->ic_ifp; 995 int i, mode, rate, mword; 996 const struct ieee80211_rateset *rs; 997 998 /* NB: skip AUTO since it has no rates */ 999 for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) { 1000 if (isclr(ic->ic_modecaps, mode)) 1001 continue; 1002 if_printf(ifp, "%s rates: ", ieee80211_phymode_name[mode]); 1003 rs = &ic->ic_sup_rates[mode]; 1004 for (i = 0; i < rs->rs_nrates; i++) { 1005 mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode); 1006 if (mword == 0) 1007 continue; 1008 rate = ieee80211_media2rate(mword); 1009 printf("%s%d%sMbps", (i != 0 ? " " : ""), 1010 rate / 2, ((rate & 0x1) != 0 ? ".5" : "")); 1011 } 1012 printf("\n"); 1013 } 1014 ieee80211_ht_announce(ic); 1015} 1016 1017void 1018ieee80211_announce_channels(struct ieee80211com *ic) 1019{ 1020 const struct ieee80211_channel *c; 1021 char type; 1022 int i, cw; 1023 1024 printf("Chan Freq CW RegPwr MinPwr MaxPwr\n"); 1025 for (i = 0; i < ic->ic_nchans; i++) { 1026 c = &ic->ic_channels[i]; 1027 if (IEEE80211_IS_CHAN_ST(c)) 1028 type = 'S'; 1029 else if (IEEE80211_IS_CHAN_108A(c)) 1030 type = 'T'; 1031 else if (IEEE80211_IS_CHAN_108G(c)) 1032 type = 'G'; 1033 else if (IEEE80211_IS_CHAN_HT(c)) 1034 type = 'n'; 1035 else if (IEEE80211_IS_CHAN_A(c)) 1036 type = 'a'; 1037 else if (IEEE80211_IS_CHAN_ANYG(c)) 1038 type = 'g'; 1039 else if (IEEE80211_IS_CHAN_B(c)) 1040 type = 'b'; 1041 else 1042 type = 'f'; 1043 if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c)) 1044 cw = 40; 1045 else if (IEEE80211_IS_CHAN_HALF(c)) 1046 cw = 10; 1047 else if (IEEE80211_IS_CHAN_QUARTER(c)) 1048 cw = 5; 1049 else 1050 cw = 20; 1051 printf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n" 1052 , c->ic_ieee, c->ic_freq, type 1053 , cw 1054 , IEEE80211_IS_CHAN_HT40U(c) ? '+' : 1055 IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' ' 1056 , c->ic_maxregpower 1057 , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0 1058 , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0 1059 ); 1060 } 1061} 1062 1063static int 1064media2mode(const struct ifmedia_entry *ime, uint32_t flags, uint16_t *mode) 1065{ 1066 switch (IFM_MODE(ime->ifm_media)) { 1067 case IFM_IEEE80211_11A: 1068 *mode = IEEE80211_MODE_11A; 1069 break; 1070 case IFM_IEEE80211_11B: 1071 *mode = IEEE80211_MODE_11B; 1072 break; 1073 case IFM_IEEE80211_11G: 1074 *mode = IEEE80211_MODE_11G; 1075 break; 1076 case IFM_IEEE80211_FH: 1077 *mode = IEEE80211_MODE_FH; 1078 break; 1079 case IFM_IEEE80211_11NA: 1080 *mode = IEEE80211_MODE_11NA; 1081 break; 1082 case IFM_IEEE80211_11NG: 1083 *mode = IEEE80211_MODE_11NG; 1084 break; 1085 case IFM_AUTO: 1086 *mode = IEEE80211_MODE_AUTO; 1087 break; 1088 default: 1089 return 0; 1090 } 1091 /* 1092 * Turbo mode is an ``option''. 1093 * XXX does not apply to AUTO 1094 */ 1095 if (ime->ifm_media & IFM_IEEE80211_TURBO) { 1096 if (*mode == IEEE80211_MODE_11A) { 1097 if (flags & IEEE80211_F_TURBOP) 1098 *mode = IEEE80211_MODE_TURBO_A; 1099 else 1100 *mode = IEEE80211_MODE_STURBO_A; 1101 } else if (*mode == IEEE80211_MODE_11G) 1102 *mode = IEEE80211_MODE_TURBO_G; 1103 else 1104 return 0; 1105 } 1106 /* XXX HT40 +/- */ 1107 return 1; 1108} 1109 1110/* 1111 * Handle a media change request on the underlying interface. 1112 */ 1113int 1114ieee80211com_media_change(struct ifnet *ifp) 1115{ 1116 return EINVAL; 1117} 1118 1119/* 1120 * Handle a media change request on the vap interface. 1121 */ 1122int 1123ieee80211_media_change(struct ifnet *ifp) 1124{ 1125 struct ieee80211vap *vap = ifp->if_softc; 1126 struct ifmedia_entry *ime = vap->iv_media.ifm_cur; 1127 uint16_t newmode; 1128 1129 if (!media2mode(ime, vap->iv_flags, &newmode)) 1130 return EINVAL; 1131 if (vap->iv_des_mode != newmode) { 1132 vap->iv_des_mode = newmode; 1133 return ENETRESET; 1134 } 1135 return 0; 1136} 1137 1138/* 1139 * Common code to calculate the media status word 1140 * from the operating mode and channel state. 1141 */ 1142static int 1143media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan) 1144{ 1145 int status; 1146 1147 status = IFM_IEEE80211; 1148 switch (opmode) { 1149 case IEEE80211_M_STA: 1150 break; 1151 case IEEE80211_M_IBSS: 1152 status |= IFM_IEEE80211_ADHOC; 1153 break; 1154 case IEEE80211_M_HOSTAP: 1155 status |= IFM_IEEE80211_HOSTAP; 1156 break; 1157 case IEEE80211_M_MONITOR: 1158 status |= IFM_IEEE80211_MONITOR; 1159 break; 1160 case IEEE80211_M_AHDEMO: 1161 status |= IFM_IEEE80211_ADHOC | IFM_FLAG0; 1162 break; 1163 case IEEE80211_M_WDS: 1164 status |= IFM_IEEE80211_WDS; 1165 break; 1166 } 1167 if (IEEE80211_IS_CHAN_HTA(chan)) { 1168 status |= IFM_IEEE80211_11NA; 1169 } else if (IEEE80211_IS_CHAN_HTG(chan)) { 1170 status |= IFM_IEEE80211_11NG; 1171 } else if (IEEE80211_IS_CHAN_A(chan)) { 1172 status |= IFM_IEEE80211_11A; 1173 } else if (IEEE80211_IS_CHAN_B(chan)) { 1174 status |= IFM_IEEE80211_11B; 1175 } else if (IEEE80211_IS_CHAN_ANYG(chan)) { 1176 status |= IFM_IEEE80211_11G; 1177 } else if (IEEE80211_IS_CHAN_FHSS(chan)) { 1178 status |= IFM_IEEE80211_FH; 1179 } 1180 /* XXX else complain? */ 1181 1182 if (IEEE80211_IS_CHAN_TURBO(chan)) 1183 status |= IFM_IEEE80211_TURBO; 1184#if 0 1185 if (IEEE80211_IS_CHAN_HT20(chan)) 1186 status |= IFM_IEEE80211_HT20; 1187 if (IEEE80211_IS_CHAN_HT40(chan)) 1188 status |= IFM_IEEE80211_HT40; 1189#endif 1190 return status; 1191} 1192 1193static void 1194ieee80211com_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1195{ 1196 struct ieee80211com *ic = ifp->if_l2com; 1197 struct ieee80211vap *vap; 1198 1199 imr->ifm_status = IFM_AVALID; 1200 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1201 if (vap->iv_ifp->if_flags & IFF_UP) { 1202 imr->ifm_status |= IFM_ACTIVE; 1203 break; 1204 } 1205 imr->ifm_active = media_status(ic->ic_opmode, ic->ic_curchan); 1206 if (imr->ifm_status & IFM_ACTIVE) 1207 imr->ifm_current = imr->ifm_active; 1208} 1209 1210void 1211ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1212{ 1213 struct ieee80211vap *vap = ifp->if_softc; 1214 struct ieee80211com *ic = vap->iv_ic; 1215 enum ieee80211_phymode mode; 1216 1217 imr->ifm_status = IFM_AVALID; 1218 /* 1219 * NB: use the current channel's mode to lock down a xmit 1220 * rate only when running; otherwise we may have a mismatch 1221 * in which case the rate will not be convertible. 1222 */ 1223 if (vap->iv_state == IEEE80211_S_RUN) { 1224 imr->ifm_status |= IFM_ACTIVE; 1225 mode = ieee80211_chan2mode(ic->ic_curchan); 1226 } else 1227 mode = IEEE80211_MODE_AUTO; 1228 imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan); 1229 /* 1230 * Calculate a current rate if possible. 1231 */ 1232 if (vap->iv_txparms[mode].ucastrate != IEEE80211_FIXED_RATE_NONE) { 1233 /* 1234 * A fixed rate is set, report that. 1235 */ 1236 imr->ifm_active |= ieee80211_rate2media(ic, 1237 vap->iv_txparms[mode].ucastrate, mode); 1238 } else if (vap->iv_opmode == IEEE80211_M_STA) { 1239 /* 1240 * In station mode report the current transmit rate. 1241 */ 1242 imr->ifm_active |= ieee80211_rate2media(ic, 1243 vap->iv_bss->ni_txrate, mode); 1244 } else 1245 imr->ifm_active |= IFM_AUTO; 1246 if (imr->ifm_status & IFM_ACTIVE) 1247 imr->ifm_current = imr->ifm_active; 1248} 1249 1250/* 1251 * Set the current phy mode and recalculate the active channel 1252 * set based on the available channels for this mode. Also 1253 * select a new default/current channel if the current one is 1254 * inappropriate for this mode. 1255 */ 1256int 1257ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode) 1258{ 1259 /* 1260 * Adjust basic rates in 11b/11g supported rate set. 1261 * Note that if operating on a hal/quarter rate channel 1262 * this is a noop as those rates sets are different 1263 * and used instead. 1264 */ 1265 if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B) 1266 ieee80211_setbasicrates(&ic->ic_sup_rates[mode], mode); 1267 1268 ic->ic_curmode = mode; 1269 ieee80211_reset_erp(ic); /* reset ERP state */ 1270 1271 return 0; 1272} 1273 1274/* 1275 * Return the phy mode for with the specified channel. 1276 */ 1277enum ieee80211_phymode 1278ieee80211_chan2mode(const struct ieee80211_channel *chan) 1279{ 1280 1281 if (IEEE80211_IS_CHAN_HTA(chan)) 1282 return IEEE80211_MODE_11NA; 1283 else if (IEEE80211_IS_CHAN_HTG(chan)) 1284 return IEEE80211_MODE_11NG; 1285 else if (IEEE80211_IS_CHAN_108G(chan)) 1286 return IEEE80211_MODE_TURBO_G; 1287 else if (IEEE80211_IS_CHAN_ST(chan)) 1288 return IEEE80211_MODE_STURBO_A; 1289 else if (IEEE80211_IS_CHAN_TURBO(chan)) 1290 return IEEE80211_MODE_TURBO_A; 1291 else if (IEEE80211_IS_CHAN_A(chan)) 1292 return IEEE80211_MODE_11A; 1293 else if (IEEE80211_IS_CHAN_ANYG(chan)) 1294 return IEEE80211_MODE_11G; 1295 else if (IEEE80211_IS_CHAN_B(chan)) 1296 return IEEE80211_MODE_11B; 1297 else if (IEEE80211_IS_CHAN_FHSS(chan)) 1298 return IEEE80211_MODE_FH; 1299 1300 /* NB: should not get here */ 1301 printf("%s: cannot map channel to mode; freq %u flags 0x%x\n", 1302 __func__, chan->ic_freq, chan->ic_flags); 1303 return IEEE80211_MODE_11B; 1304} 1305 1306struct ratemedia { 1307 u_int match; /* rate + mode */ 1308 u_int media; /* if_media rate */ 1309}; 1310 1311static int 1312findmedia(const struct ratemedia rates[], int n, u_int match) 1313{ 1314 int i; 1315 1316 for (i = 0; i < n; i++) 1317 if (rates[i].match == match) 1318 return rates[i].media; 1319 return IFM_AUTO; 1320} 1321 1322/* 1323 * Convert IEEE80211 rate value to ifmedia subtype. 1324 * Rate is either a legacy rate in units of 0.5Mbps 1325 * or an MCS index. 1326 */ 1327int 1328ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode) 1329{ 1330#define N(a) (sizeof(a) / sizeof(a[0])) 1331 static const struct ratemedia rates[] = { 1332 { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 }, 1333 { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 }, 1334 { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 }, 1335 { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 }, 1336 { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 }, 1337 { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 }, 1338 { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 }, 1339 { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 }, 1340 { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 }, 1341 { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 }, 1342 { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 }, 1343 { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 }, 1344 { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 }, 1345 { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 }, 1346 { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 }, 1347 { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 }, 1348 { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 }, 1349 { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 }, 1350 { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 }, 1351 { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 }, 1352 { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 }, 1353 { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 }, 1354 { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 }, 1355 { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 }, 1356 { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 }, 1357 { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 }, 1358 { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 }, 1359 { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 }, 1360 { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 }, 1361 { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 }, 1362 /* NB: OFDM72 doesn't realy exist so we don't handle it */ 1363 }; 1364 static const struct ratemedia htrates[] = { 1365 { 0, IFM_IEEE80211_MCS }, 1366 { 1, IFM_IEEE80211_MCS }, 1367 { 2, IFM_IEEE80211_MCS }, 1368 { 3, IFM_IEEE80211_MCS }, 1369 { 4, IFM_IEEE80211_MCS }, 1370 { 5, IFM_IEEE80211_MCS }, 1371 { 6, IFM_IEEE80211_MCS }, 1372 { 7, IFM_IEEE80211_MCS }, 1373 { 8, IFM_IEEE80211_MCS }, 1374 { 9, IFM_IEEE80211_MCS }, 1375 { 10, IFM_IEEE80211_MCS }, 1376 { 11, IFM_IEEE80211_MCS }, 1377 { 12, IFM_IEEE80211_MCS }, 1378 { 13, IFM_IEEE80211_MCS }, 1379 { 14, IFM_IEEE80211_MCS }, 1380 { 15, IFM_IEEE80211_MCS }, 1381 }; 1382 int m; 1383 1384 /* 1385 * Check 11n rates first for match as an MCS. 1386 */ 1387 if (mode == IEEE80211_MODE_11NA) { 1388 if (rate & IEEE80211_RATE_MCS) { 1389 rate &= ~IEEE80211_RATE_MCS; 1390 m = findmedia(htrates, N(htrates), rate); 1391 if (m != IFM_AUTO) 1392 return m | IFM_IEEE80211_11NA; 1393 } 1394 } else if (mode == IEEE80211_MODE_11NG) { 1395 /* NB: 12 is ambiguous, it will be treated as an MCS */ 1396 if (rate & IEEE80211_RATE_MCS) { 1397 rate &= ~IEEE80211_RATE_MCS; 1398 m = findmedia(htrates, N(htrates), rate); 1399 if (m != IFM_AUTO) 1400 return m | IFM_IEEE80211_11NG; 1401 } 1402 } 1403 rate &= IEEE80211_RATE_VAL; 1404 switch (mode) { 1405 case IEEE80211_MODE_11A: 1406 case IEEE80211_MODE_11NA: 1407 case IEEE80211_MODE_TURBO_A: 1408 case IEEE80211_MODE_STURBO_A: 1409 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11A); 1410 case IEEE80211_MODE_11B: 1411 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11B); 1412 case IEEE80211_MODE_FH: 1413 return findmedia(rates, N(rates), rate | IFM_IEEE80211_FH); 1414 case IEEE80211_MODE_AUTO: 1415 /* NB: ic may be NULL for some drivers */ 1416 if (ic && ic->ic_phytype == IEEE80211_T_FH) 1417 return findmedia(rates, N(rates), 1418 rate | IFM_IEEE80211_FH); 1419 /* NB: hack, 11g matches both 11b+11a rates */ 1420 /* fall thru... */ 1421 case IEEE80211_MODE_11G: 1422 case IEEE80211_MODE_11NG: 1423 case IEEE80211_MODE_TURBO_G: 1424 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11G); 1425 } 1426 return IFM_AUTO; 1427#undef N 1428} 1429 1430int 1431ieee80211_media2rate(int mword) 1432{ 1433#define N(a) (sizeof(a) / sizeof(a[0])) 1434 static const int ieeerates[] = { 1435 -1, /* IFM_AUTO */ 1436 0, /* IFM_MANUAL */ 1437 0, /* IFM_NONE */ 1438 2, /* IFM_IEEE80211_FH1 */ 1439 4, /* IFM_IEEE80211_FH2 */ 1440 2, /* IFM_IEEE80211_DS1 */ 1441 4, /* IFM_IEEE80211_DS2 */ 1442 11, /* IFM_IEEE80211_DS5 */ 1443 22, /* IFM_IEEE80211_DS11 */ 1444 44, /* IFM_IEEE80211_DS22 */ 1445 12, /* IFM_IEEE80211_OFDM6 */ 1446 18, /* IFM_IEEE80211_OFDM9 */ 1447 24, /* IFM_IEEE80211_OFDM12 */ 1448 36, /* IFM_IEEE80211_OFDM18 */ 1449 48, /* IFM_IEEE80211_OFDM24 */ 1450 72, /* IFM_IEEE80211_OFDM36 */ 1451 96, /* IFM_IEEE80211_OFDM48 */ 1452 108, /* IFM_IEEE80211_OFDM54 */ 1453 144, /* IFM_IEEE80211_OFDM72 */ 1454 0, /* IFM_IEEE80211_DS354k */ 1455 0, /* IFM_IEEE80211_DS512k */ 1456 6, /* IFM_IEEE80211_OFDM3 */ 1457 9, /* IFM_IEEE80211_OFDM4 */ 1458 54, /* IFM_IEEE80211_OFDM27 */ 1459 -1, /* IFM_IEEE80211_MCS */ 1460 }; 1461 return IFM_SUBTYPE(mword) < N(ieeerates) ? 1462 ieeerates[IFM_SUBTYPE(mword)] : 0; 1463#undef N 1464} 1465