ieee80211.c revision 184278
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 184278 2008-10-25 23:43:08Z 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 KASSERT(c->ic_ieee < IEEE80211_CHAN_MAX, 130 ("channel with bogus ieee number %u", c->ic_ieee)); 131 setbit(ic->ic_chan_avail, c->ic_ieee); 132 /* 133 * Identify mode capabilities. 134 */ 135 if (IEEE80211_IS_CHAN_A(c)) 136 setbit(ic->ic_modecaps, IEEE80211_MODE_11A); 137 if (IEEE80211_IS_CHAN_B(c)) 138 setbit(ic->ic_modecaps, IEEE80211_MODE_11B); 139 if (IEEE80211_IS_CHAN_ANYG(c)) 140 setbit(ic->ic_modecaps, IEEE80211_MODE_11G); 141 if (IEEE80211_IS_CHAN_FHSS(c)) 142 setbit(ic->ic_modecaps, IEEE80211_MODE_FH); 143 if (IEEE80211_IS_CHAN_108A(c)) 144 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_A); 145 if (IEEE80211_IS_CHAN_108G(c)) 146 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_G); 147 if (IEEE80211_IS_CHAN_ST(c)) 148 setbit(ic->ic_modecaps, IEEE80211_MODE_STURBO_A); 149 if (IEEE80211_IS_CHAN_HTA(c)) 150 setbit(ic->ic_modecaps, IEEE80211_MODE_11NA); 151 if (IEEE80211_IS_CHAN_HTG(c)) 152 setbit(ic->ic_modecaps, IEEE80211_MODE_11NG); 153 } 154 /* initialize candidate channels to all available */ 155 memcpy(ic->ic_chan_active, ic->ic_chan_avail, 156 sizeof(ic->ic_chan_avail)); 157 158 /* sort channel table to allow lookup optimizations */ 159 ieee80211_sort_channels(ic->ic_channels, ic->ic_nchans); 160 161 /* invalidate any previous state */ 162 ic->ic_bsschan = IEEE80211_CHAN_ANYC; 163 ic->ic_prevchan = NULL; 164 ic->ic_csa_newchan = NULL; 165 /* arbitrarily pick the first channel */ 166 ic->ic_curchan = &ic->ic_channels[0]; 167 168 /* fillin well-known rate sets if driver has not specified */ 169 DEFAULTRATES(IEEE80211_MODE_11B, ieee80211_rateset_11b); 170 DEFAULTRATES(IEEE80211_MODE_11G, ieee80211_rateset_11g); 171 DEFAULTRATES(IEEE80211_MODE_11A, ieee80211_rateset_11a); 172 DEFAULTRATES(IEEE80211_MODE_TURBO_A, ieee80211_rateset_11a); 173 DEFAULTRATES(IEEE80211_MODE_TURBO_G, ieee80211_rateset_11g); 174 175 /* 176 * Set auto mode to reset active channel state and any desired channel. 177 */ 178 (void) ieee80211_setmode(ic, IEEE80211_MODE_AUTO); 179#undef DEFAULTRATES 180} 181 182static void 183null_update_mcast(struct ifnet *ifp) 184{ 185 if_printf(ifp, "need multicast update callback\n"); 186} 187 188static void 189null_update_promisc(struct ifnet *ifp) 190{ 191 if_printf(ifp, "need promiscuous mode update callback\n"); 192} 193 194static int 195null_output(struct ifnet *ifp, struct mbuf *m, 196 struct sockaddr *dst, struct rtentry *rt0) 197{ 198 if_printf(ifp, "discard raw packet\n"); 199 m_freem(m); 200 return EIO; 201} 202 203static void 204null_input(struct ifnet *ifp, struct mbuf *m) 205{ 206 if_printf(ifp, "if_input should not be called\n"); 207 m_freem(m); 208} 209 210/* 211 * Attach/setup the common net80211 state. Called by 212 * the driver on attach to prior to creating any vap's. 213 */ 214void 215ieee80211_ifattach(struct ieee80211com *ic) 216{ 217 struct ifnet *ifp = ic->ic_ifp; 218 struct sockaddr_dl *sdl; 219 struct ifaddr *ifa; 220 221 KASSERT(ifp->if_type == IFT_IEEE80211, ("if_type %d", ifp->if_type)); 222 223 IEEE80211_LOCK_INIT(ic, ifp->if_xname); 224 TAILQ_INIT(&ic->ic_vaps); 225 /* 226 * Fill in 802.11 available channel set, mark all 227 * available channels as active, and pick a default 228 * channel if not already specified. 229 */ 230 ieee80211_media_init(ic); 231 232 ic->ic_update_mcast = null_update_mcast; 233 ic->ic_update_promisc = null_update_promisc; 234 235 ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT; 236 ic->ic_lintval = ic->ic_bintval; 237 ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX; 238 239 ieee80211_crypto_attach(ic); 240 ieee80211_node_attach(ic); 241 ieee80211_power_attach(ic); 242 ieee80211_proto_attach(ic); 243 ieee80211_ht_attach(ic); 244 ieee80211_scan_attach(ic); 245 ieee80211_regdomain_attach(ic); 246 247 ieee80211_sysctl_attach(ic); 248 249 ifp->if_addrlen = IEEE80211_ADDR_LEN; 250 ifp->if_hdrlen = 0; 251 if_attach(ifp); 252 ifp->if_mtu = IEEE80211_MTU_MAX; 253 ifp->if_broadcastaddr = ieee80211broadcastaddr; 254 ifp->if_output = null_output; 255 ifp->if_input = null_input; /* just in case */ 256 ifp->if_resolvemulti = NULL; /* NB: callers check */ 257 258 ifa = ifaddr_byindex(ifp->if_index); 259 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); 260 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 261 sdl->sdl_type = IFT_ETHER; /* XXX IFT_IEEE80211? */ 262 sdl->sdl_alen = IEEE80211_ADDR_LEN; 263 IEEE80211_ADDR_COPY(LLADDR(sdl), ic->ic_myaddr); 264} 265 266/* 267 * Detach net80211 state on device detach. Tear down 268 * all vap's and reclaim all common state prior to the 269 * device state going away. Note we may call back into 270 * driver; it must be prepared for this. 271 */ 272void 273ieee80211_ifdetach(struct ieee80211com *ic) 274{ 275 struct ifnet *ifp = ic->ic_ifp; 276 struct ieee80211vap *vap; 277 278 /* XXX ieee80211_stop_all? */ 279 while ((vap = TAILQ_FIRST(&ic->ic_vaps)) != NULL) 280 ieee80211_vap_destroy(vap); 281 282 ieee80211_sysctl_detach(ic); 283 ieee80211_regdomain_detach(ic); 284 ieee80211_scan_detach(ic); 285 ieee80211_ht_detach(ic); 286 /* NB: must be called before ieee80211_node_detach */ 287 ieee80211_proto_detach(ic); 288 ieee80211_crypto_detach(ic); 289 ieee80211_power_detach(ic); 290 ieee80211_node_detach(ic); 291 ifmedia_removeall(&ic->ic_media); 292 293 IEEE80211_LOCK_DESTROY(ic); 294 if_detach(ifp); 295} 296 297/* 298 * Default reset method for use with the ioctl support. This 299 * method is invoked after any state change in the 802.11 300 * layer that should be propagated to the hardware but not 301 * require re-initialization of the 802.11 state machine (e.g 302 * rescanning for an ap). We always return ENETRESET which 303 * should cause the driver to re-initialize the device. Drivers 304 * can override this method to implement more optimized support. 305 */ 306static int 307default_reset(struct ieee80211vap *vap, u_long cmd) 308{ 309 return ENETRESET; 310} 311 312/* 313 * Prepare a vap for use. Drivers use this call to 314 * setup net80211 state in new vap's prior attaching 315 * them with ieee80211_vap_attach (below). 316 */ 317int 318ieee80211_vap_setup(struct ieee80211com *ic, struct ieee80211vap *vap, 319 const char name[IFNAMSIZ], int unit, int opmode, int flags, 320 const uint8_t bssid[IEEE80211_ADDR_LEN], 321 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 322{ 323 struct ifnet *ifp; 324 325 ifp = if_alloc(IFT_ETHER); 326 if (ifp == NULL) { 327 if_printf(ic->ic_ifp, "%s: unable to allocate ifnet\n", 328 __func__); 329 return ENOMEM; 330 } 331 if_initname(ifp, name, unit); 332 ifp->if_softc = vap; /* back pointer */ 333 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 334 ifp->if_start = ieee80211_start; 335 ifp->if_ioctl = ieee80211_ioctl; 336 ifp->if_watchdog = NULL; /* NB: no watchdog routine */ 337 ifp->if_init = ieee80211_init; 338 /* NB: input+output filled in by ether_ifattach */ 339 IFQ_SET_MAXLEN(&ifp->if_snd, IFQ_MAXLEN); 340 ifp->if_snd.ifq_drv_maxlen = IFQ_MAXLEN; 341 IFQ_SET_READY(&ifp->if_snd); 342 343 vap->iv_ifp = ifp; 344 vap->iv_ic = ic; 345 vap->iv_flags = ic->ic_flags; /* propagate common flags */ 346 vap->iv_flags_ext = ic->ic_flags_ext; 347 vap->iv_flags_ven = ic->ic_flags_ven; 348 vap->iv_caps = ic->ic_caps &~ IEEE80211_C_OPMODE; 349 vap->iv_htcaps = ic->ic_htcaps; 350 vap->iv_opmode = opmode; 351 vap->iv_caps |= ieee80211_opcap[opmode]; 352 switch (opmode) { 353 case IEEE80211_M_WDS: 354 /* 355 * WDS links must specify the bssid of the far end. 356 * For legacy operation this is a static relationship. 357 * For non-legacy operation the station must associate 358 * and be authorized to pass traffic. Plumbing the 359 * vap to the proper node happens when the vap 360 * transitions to RUN state. 361 */ 362 IEEE80211_ADDR_COPY(vap->iv_des_bssid, bssid); 363 vap->iv_flags |= IEEE80211_F_DESBSSID; 364 if (flags & IEEE80211_CLONE_WDSLEGACY) 365 vap->iv_flags_ext |= IEEE80211_FEXT_WDSLEGACY; 366 break; 367 } 368 /* auto-enable s/w beacon miss support */ 369 if (flags & IEEE80211_CLONE_NOBEACONS) 370 vap->iv_flags_ext |= IEEE80211_FEXT_SWBMISS; 371 /* 372 * Enable various functionality by default if we're 373 * capable; the driver can override us if it knows better. 374 */ 375 if (vap->iv_caps & IEEE80211_C_WME) 376 vap->iv_flags |= IEEE80211_F_WME; 377 if (vap->iv_caps & IEEE80211_C_BURST) 378 vap->iv_flags |= IEEE80211_F_BURST; 379 if (vap->iv_caps & IEEE80211_C_FF) 380 vap->iv_flags |= IEEE80211_F_FF; 381 if (vap->iv_caps & IEEE80211_C_TURBOP) 382 vap->iv_flags |= IEEE80211_F_TURBOP; 383 /* NB: bg scanning only makes sense for station mode right now */ 384 if (vap->iv_opmode == IEEE80211_M_STA && 385 (vap->iv_caps & IEEE80211_C_BGSCAN)) 386 vap->iv_flags |= IEEE80211_F_BGSCAN; 387 vap->iv_flags |= IEEE80211_F_DOTH; /* XXX no cap, just ena */ 388 /* NB: DFS support only makes sense for ap mode right now */ 389 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 390 (vap->iv_caps & IEEE80211_C_DFS)) 391 vap->iv_flags_ext |= IEEE80211_FEXT_DFS; 392 393 vap->iv_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */ 394 vap->iv_bmissthreshold = IEEE80211_HWBMISS_DEFAULT; 395 vap->iv_dtim_period = IEEE80211_DTIM_DEFAULT; 396 /* 397 * Install a default reset method for the ioctl support; 398 * the driver can override this. 399 */ 400 vap->iv_reset = default_reset; 401 402 IEEE80211_ADDR_COPY(vap->iv_myaddr, macaddr); 403 404 ieee80211_sysctl_vattach(vap); 405 ieee80211_crypto_vattach(vap); 406 ieee80211_node_vattach(vap); 407 ieee80211_power_vattach(vap); 408 ieee80211_proto_vattach(vap); 409 ieee80211_ht_vattach(vap); 410 ieee80211_scan_vattach(vap); 411 ieee80211_regdomain_vattach(vap); 412 413 return 0; 414} 415 416/* 417 * Activate a vap. State should have been prepared with a 418 * call to ieee80211_vap_setup and by the driver. On return 419 * from this call the vap is ready for use. 420 */ 421int 422ieee80211_vap_attach(struct ieee80211vap *vap, 423 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) 424{ 425 struct ifnet *ifp = vap->iv_ifp; 426 struct ieee80211com *ic = vap->iv_ic; 427 struct ifmediareq imr; 428 int maxrate; 429 430 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 431 "%s: %s parent %s flags 0x%x flags_ext 0x%x\n", 432 __func__, ieee80211_opmode_name[vap->iv_opmode], 433 ic->ic_ifp->if_xname, vap->iv_flags, vap->iv_flags_ext); 434 435 /* 436 * Do late attach work that cannot happen until after 437 * the driver has had a chance to override defaults. 438 */ 439 ieee80211_node_latevattach(vap); 440 ieee80211_power_latevattach(vap); 441 442 maxrate = ieee80211_media_setup(ic, &vap->iv_media, vap->iv_caps, 443 vap->iv_opmode == IEEE80211_M_STA, media_change, media_stat); 444 ieee80211_media_status(ifp, &imr); 445 /* NB: strip explicit mode; we're actually in autoselect */ 446 ifmedia_set(&vap->iv_media, imr.ifm_active &~ IFM_MMASK); 447 if (maxrate) 448 ifp->if_baudrate = IF_Mbps(maxrate); 449 450 ether_ifattach(ifp, vap->iv_myaddr); 451 /* hook output method setup by ether_ifattach */ 452 vap->iv_output = ifp->if_output; 453 ifp->if_output = ieee80211_output; 454 /* NB: if_mtu set by ether_ifattach to ETHERMTU */ 455 bpfattach2(ifp, DLT_IEEE802_11, ifp->if_hdrlen, &vap->iv_rawbpf); 456 457 IEEE80211_LOCK(ic); 458 TAILQ_INSERT_TAIL(&ic->ic_vaps, vap, iv_next); 459 ieee80211_syncflag_locked(ic, IEEE80211_F_WME); 460 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); 461 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); 462 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); 463 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_HT); 464 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_USEHT40); 465 ieee80211_syncifflag_locked(ic, IFF_PROMISC); 466 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI); 467 IEEE80211_UNLOCK(ic); 468 469 return 1; 470} 471 472/* 473 * Tear down vap state and reclaim the ifnet. 474 * The driver is assumed to have prepared for 475 * this; e.g. by turning off interrupts for the 476 * underlying device. 477 */ 478void 479ieee80211_vap_detach(struct ieee80211vap *vap) 480{ 481 struct ieee80211com *ic = vap->iv_ic; 482 struct ifnet *ifp = vap->iv_ifp; 483 484 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s parent %s\n", 485 __func__, ieee80211_opmode_name[vap->iv_opmode], 486 ic->ic_ifp->if_xname); 487 488 IEEE80211_LOCK(ic); 489 /* block traffic from above */ 490 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 491 /* 492 * Evil hack. Clear the backpointer from the ifnet to the 493 * vap so any requests from above will return an error or 494 * be ignored. In particular this short-circuits requests 495 * by the bridge to turn off promiscuous mode as a result 496 * of calling ether_ifdetach. 497 */ 498 ifp->if_softc = NULL; 499 /* 500 * Stop the vap before detaching the ifnet. Ideally we'd 501 * do this in the other order so the ifnet is inaccessible 502 * while we cleanup internal state but that is hard. 503 */ 504 ieee80211_stop_locked(vap); 505 506 /* XXX accumulate iv_stats in ic_stats? */ 507 TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next); 508 ieee80211_syncflag_locked(ic, IEEE80211_F_WME); 509 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); 510 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); 511 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); 512 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_HT); 513 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_USEHT40); 514 ieee80211_syncifflag_locked(ic, IFF_PROMISC); 515 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI); 516 IEEE80211_UNLOCK(ic); 517 518 /* XXX can't hold com lock */ 519 /* NB: bpfattach is called by ether_ifdetach and claims all taps */ 520 ether_ifdetach(ifp); 521 522 ifmedia_removeall(&vap->iv_media); 523 524 ieee80211_regdomain_vdetach(vap); 525 ieee80211_scan_vdetach(vap); 526 ieee80211_ht_vdetach(vap); 527 /* NB: must be before ieee80211_node_vdetach */ 528 ieee80211_proto_vdetach(vap); 529 ieee80211_crypto_vdetach(vap); 530 ieee80211_power_vdetach(vap); 531 ieee80211_node_vdetach(vap); 532 ieee80211_sysctl_vdetach(vap); 533 534 if_free(ifp); 535} 536 537/* 538 * Synchronize flag bit state in the parent ifnet structure 539 * according to the state of all vap ifnet's. This is used, 540 * for example, to handle IFF_PROMISC and IFF_ALLMULTI. 541 */ 542void 543ieee80211_syncifflag_locked(struct ieee80211com *ic, int flag) 544{ 545 struct ifnet *ifp = ic->ic_ifp; 546 struct ieee80211vap *vap; 547 int bit, oflags; 548 549 IEEE80211_LOCK_ASSERT(ic); 550 551 bit = 0; 552 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 553 if (vap->iv_ifp->if_flags & flag) { 554 /* 555 * XXX the bridge sets PROMISC but we don't want to 556 * enable it on the device, discard here so all the 557 * drivers don't need to special-case it 558 */ 559 if (flag == IFF_PROMISC && 560 vap->iv_opmode == IEEE80211_M_HOSTAP) 561 continue; 562 bit = 1; 563 break; 564 } 565 oflags = ifp->if_flags; 566 if (bit) 567 ifp->if_flags |= flag; 568 else 569 ifp->if_flags &= ~flag; 570 if ((ifp->if_flags ^ oflags) & flag) { 571 /* XXX should we return 1/0 and let caller do this? */ 572 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 573 if (flag == IFF_PROMISC) 574 ic->ic_update_promisc(ifp); 575 else if (flag == IFF_ALLMULTI) 576 ic->ic_update_mcast(ifp); 577 } 578 } 579} 580 581/* 582 * Synchronize flag bit state in the com structure 583 * according to the state of all vap's. This is used, 584 * for example, to handle state changes via ioctls. 585 */ 586static void 587ieee80211_syncflag_locked(struct ieee80211com *ic, int flag) 588{ 589 struct ieee80211vap *vap; 590 int bit; 591 592 IEEE80211_LOCK_ASSERT(ic); 593 594 bit = 0; 595 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 596 if (vap->iv_flags & flag) { 597 bit = 1; 598 break; 599 } 600 if (bit) 601 ic->ic_flags |= flag; 602 else 603 ic->ic_flags &= ~flag; 604} 605 606void 607ieee80211_syncflag(struct ieee80211vap *vap, int flag) 608{ 609 struct ieee80211com *ic = vap->iv_ic; 610 611 IEEE80211_LOCK(ic); 612 if (flag < 0) { 613 flag = -flag; 614 vap->iv_flags &= ~flag; 615 } else 616 vap->iv_flags |= flag; 617 ieee80211_syncflag_locked(ic, flag); 618 IEEE80211_UNLOCK(ic); 619} 620 621/* 622 * Synchronize flag bit state in the com structure 623 * according to the state of all vap's. This is used, 624 * for example, to handle state changes via ioctls. 625 */ 626static void 627ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag) 628{ 629 struct ieee80211vap *vap; 630 int bit; 631 632 IEEE80211_LOCK_ASSERT(ic); 633 634 bit = 0; 635 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 636 if (vap->iv_flags_ext & flag) { 637 bit = 1; 638 break; 639 } 640 if (bit) 641 ic->ic_flags_ext |= flag; 642 else 643 ic->ic_flags_ext &= ~flag; 644} 645 646void 647ieee80211_syncflag_ext(struct ieee80211vap *vap, int flag) 648{ 649 struct ieee80211com *ic = vap->iv_ic; 650 651 IEEE80211_LOCK(ic); 652 if (flag < 0) { 653 flag = -flag; 654 vap->iv_flags_ext &= ~flag; 655 } else 656 vap->iv_flags_ext |= flag; 657 ieee80211_syncflag_ext_locked(ic, flag); 658 IEEE80211_UNLOCK(ic); 659} 660 661static __inline int 662mapgsm(u_int freq, u_int flags) 663{ 664 freq *= 10; 665 if (flags & IEEE80211_CHAN_QUARTER) 666 freq += 5; 667 else if (flags & IEEE80211_CHAN_HALF) 668 freq += 10; 669 else 670 freq += 20; 671 /* NB: there is no 907/20 wide but leave room */ 672 return (freq - 906*10) / 5; 673} 674 675static __inline int 676mappsb(u_int freq, u_int flags) 677{ 678 return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5; 679} 680 681/* 682 * Convert MHz frequency to IEEE channel number. 683 */ 684int 685ieee80211_mhz2ieee(u_int freq, u_int flags) 686{ 687#define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990) 688 if (flags & IEEE80211_CHAN_GSM) 689 return mapgsm(freq, flags); 690 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 691 if (freq == 2484) 692 return 14; 693 if (freq < 2484) 694 return ((int) freq - 2407) / 5; 695 else 696 return 15 + ((freq - 2512) / 20); 697 } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */ 698 if (freq <= 5000) { 699 /* XXX check regdomain? */ 700 if (IS_FREQ_IN_PSB(freq)) 701 return mappsb(freq, flags); 702 return (freq - 4000) / 5; 703 } else 704 return (freq - 5000) / 5; 705 } else { /* either, guess */ 706 if (freq == 2484) 707 return 14; 708 if (freq < 2484) { 709 if (907 <= freq && freq <= 922) 710 return mapgsm(freq, flags); 711 return ((int) freq - 2407) / 5; 712 } 713 if (freq < 5000) { 714 if (IS_FREQ_IN_PSB(freq)) 715 return mappsb(freq, flags); 716 else if (freq > 4900) 717 return (freq - 4000) / 5; 718 else 719 return 15 + ((freq - 2512) / 20); 720 } 721 return (freq - 5000) / 5; 722 } 723#undef IS_FREQ_IN_PSB 724} 725 726/* 727 * Convert channel to IEEE channel number. 728 */ 729int 730ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c) 731{ 732 if (c == NULL) { 733 if_printf(ic->ic_ifp, "invalid channel (NULL)\n"); 734 return 0; /* XXX */ 735 } 736 return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee); 737} 738 739/* 740 * Convert IEEE channel number to MHz frequency. 741 */ 742u_int 743ieee80211_ieee2mhz(u_int chan, u_int flags) 744{ 745 if (flags & IEEE80211_CHAN_GSM) 746 return 907 + 5 * (chan / 10); 747 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 748 if (chan == 14) 749 return 2484; 750 if (chan < 14) 751 return 2407 + chan*5; 752 else 753 return 2512 + ((chan-15)*20); 754 } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */ 755 if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) { 756 chan -= 37; 757 return 4940 + chan*5 + (chan % 5 ? 2 : 0); 758 } 759 return 5000 + (chan*5); 760 } else { /* either, guess */ 761 /* XXX can't distinguish PSB+GSM channels */ 762 if (chan == 14) 763 return 2484; 764 if (chan < 14) /* 0-13 */ 765 return 2407 + chan*5; 766 if (chan < 27) /* 15-26 */ 767 return 2512 + ((chan-15)*20); 768 return 5000 + (chan*5); 769 } 770} 771 772/* 773 * Locate a channel given a frequency+flags. We cache 774 * the previous lookup to optimize switching between two 775 * channels--as happens with dynamic turbo. 776 */ 777struct ieee80211_channel * 778ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags) 779{ 780 struct ieee80211_channel *c; 781 int i; 782 783 flags &= IEEE80211_CHAN_ALLTURBO; 784 c = ic->ic_prevchan; 785 if (c != NULL && c->ic_freq == freq && 786 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 787 return c; 788 /* brute force search */ 789 for (i = 0; i < ic->ic_nchans; i++) { 790 c = &ic->ic_channels[i]; 791 if (c->ic_freq == freq && 792 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 793 return c; 794 } 795 return NULL; 796} 797 798/* 799 * Locate a channel given a channel number+flags. We cache 800 * the previous lookup to optimize switching between two 801 * channels--as happens with dynamic turbo. 802 */ 803struct ieee80211_channel * 804ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags) 805{ 806 struct ieee80211_channel *c; 807 int i; 808 809 flags &= IEEE80211_CHAN_ALLTURBO; 810 c = ic->ic_prevchan; 811 if (c != NULL && c->ic_ieee == ieee && 812 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 813 return c; 814 /* brute force search */ 815 for (i = 0; i < ic->ic_nchans; i++) { 816 c = &ic->ic_channels[i]; 817 if (c->ic_ieee == ieee && 818 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 819 return c; 820 } 821 return NULL; 822} 823 824static void 825addmedia(struct ifmedia *media, int caps, int addsta, int mode, int mword) 826{ 827#define ADD(_ic, _s, _o) \ 828 ifmedia_add(media, \ 829 IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL) 830 static const u_int mopts[IEEE80211_MODE_MAX] = { 831 IFM_AUTO, 832 IFM_IEEE80211_11A, 833 IFM_IEEE80211_11B, 834 IFM_IEEE80211_11G, 835 IFM_IEEE80211_FH, 836 IFM_IEEE80211_11A | IFM_IEEE80211_TURBO, 837 IFM_IEEE80211_11G | IFM_IEEE80211_TURBO, 838 IFM_IEEE80211_11A | IFM_IEEE80211_TURBO, 839 IFM_IEEE80211_11NA, 840 IFM_IEEE80211_11NG, 841 }; 842 u_int mopt; 843 844 mopt = mopts[mode]; 845 if (addsta) 846 ADD(ic, mword, mopt); /* STA mode has no cap */ 847 if (caps & IEEE80211_C_IBSS) 848 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC); 849 if (caps & IEEE80211_C_HOSTAP) 850 ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP); 851 if (caps & IEEE80211_C_AHDEMO) 852 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0); 853 if (caps & IEEE80211_C_MONITOR) 854 ADD(media, mword, mopt | IFM_IEEE80211_MONITOR); 855 if (caps & IEEE80211_C_WDS) 856 ADD(media, mword, mopt | IFM_IEEE80211_WDS); 857#undef ADD 858} 859 860/* 861 * Setup the media data structures according to the channel and 862 * rate tables. 863 */ 864static int 865ieee80211_media_setup(struct ieee80211com *ic, 866 struct ifmedia *media, int caps, int addsta, 867 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) 868{ 869 int i, j, mode, rate, maxrate, mword, r; 870 const struct ieee80211_rateset *rs; 871 struct ieee80211_rateset allrates; 872 873 /* 874 * Fill in media characteristics. 875 */ 876 ifmedia_init(media, 0, media_change, media_stat); 877 maxrate = 0; 878 /* 879 * Add media for legacy operating modes. 880 */ 881 memset(&allrates, 0, sizeof(allrates)); 882 for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) { 883 if (isclr(ic->ic_modecaps, mode)) 884 continue; 885 addmedia(media, caps, addsta, mode, IFM_AUTO); 886 if (mode == IEEE80211_MODE_AUTO) 887 continue; 888 rs = &ic->ic_sup_rates[mode]; 889 for (i = 0; i < rs->rs_nrates; i++) { 890 rate = rs->rs_rates[i]; 891 mword = ieee80211_rate2media(ic, rate, mode); 892 if (mword == 0) 893 continue; 894 addmedia(media, caps, addsta, mode, mword); 895 /* 896 * Add legacy rate to the collection of all rates. 897 */ 898 r = rate & IEEE80211_RATE_VAL; 899 for (j = 0; j < allrates.rs_nrates; j++) 900 if (allrates.rs_rates[j] == r) 901 break; 902 if (j == allrates.rs_nrates) { 903 /* unique, add to the set */ 904 allrates.rs_rates[j] = r; 905 allrates.rs_nrates++; 906 } 907 rate = (rate & IEEE80211_RATE_VAL) / 2; 908 if (rate > maxrate) 909 maxrate = rate; 910 } 911 } 912 for (i = 0; i < allrates.rs_nrates; i++) { 913 mword = ieee80211_rate2media(ic, allrates.rs_rates[i], 914 IEEE80211_MODE_AUTO); 915 if (mword == 0) 916 continue; 917 /* NB: remove media options from mword */ 918 addmedia(media, caps, addsta, 919 IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword)); 920 } 921 /* 922 * Add HT/11n media. Note that we do not have enough 923 * bits in the media subtype to express the MCS so we 924 * use a "placeholder" media subtype and any fixed MCS 925 * must be specified with a different mechanism. 926 */ 927 for (; mode < IEEE80211_MODE_MAX; mode++) { 928 if (isclr(ic->ic_modecaps, mode)) 929 continue; 930 addmedia(media, caps, addsta, mode, IFM_AUTO); 931 addmedia(media, caps, addsta, mode, IFM_IEEE80211_MCS); 932 } 933 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) || 934 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) { 935 addmedia(media, caps, addsta, 936 IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS); 937 /* XXX could walk htrates */ 938 /* XXX known array size */ 939 if (ieee80211_htrates[15].ht40_rate_400ns > maxrate) 940 maxrate = ieee80211_htrates[15].ht40_rate_400ns; 941 } 942 return maxrate; 943} 944 945void 946ieee80211_media_init(struct ieee80211com *ic) 947{ 948 struct ifnet *ifp = ic->ic_ifp; 949 int maxrate; 950 951 /* NB: this works because the structure is initialized to zero */ 952 if (!LIST_EMPTY(&ic->ic_media.ifm_list)) { 953 /* 954 * We are re-initializing the channel list; clear 955 * the existing media state as the media routines 956 * don't suppress duplicates. 957 */ 958 ifmedia_removeall(&ic->ic_media); 959 } 960 ieee80211_chan_init(ic); 961 962 /* 963 * Recalculate media settings in case new channel list changes 964 * the set of available modes. 965 */ 966 maxrate = ieee80211_media_setup(ic, &ic->ic_media, ic->ic_caps, 1, 967 ieee80211com_media_change, ieee80211com_media_status); 968 /* NB: strip explicit mode; we're actually in autoselect */ 969 ifmedia_set(&ic->ic_media, 970 media_status(ic->ic_opmode, ic->ic_curchan) &~ IFM_MMASK); 971 if (maxrate) 972 ifp->if_baudrate = IF_Mbps(maxrate); 973 974 /* XXX need to propagate new media settings to vap's */ 975} 976 977const struct ieee80211_rateset * 978ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c) 979{ 980 if (IEEE80211_IS_CHAN_HALF(c)) 981 return &ieee80211_rateset_half; 982 if (IEEE80211_IS_CHAN_QUARTER(c)) 983 return &ieee80211_rateset_quarter; 984 if (IEEE80211_IS_CHAN_HTA(c)) 985 return &ic->ic_sup_rates[IEEE80211_MODE_11A]; 986 if (IEEE80211_IS_CHAN_HTG(c)) { 987 /* XXX does this work for basic rates? */ 988 return &ic->ic_sup_rates[IEEE80211_MODE_11G]; 989 } 990 return &ic->ic_sup_rates[ieee80211_chan2mode(c)]; 991} 992 993void 994ieee80211_announce(struct ieee80211com *ic) 995{ 996 struct ifnet *ifp = ic->ic_ifp; 997 int i, mode, rate, mword; 998 const struct ieee80211_rateset *rs; 999 1000 /* NB: skip AUTO since it has no rates */ 1001 for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) { 1002 if (isclr(ic->ic_modecaps, mode)) 1003 continue; 1004 if_printf(ifp, "%s rates: ", ieee80211_phymode_name[mode]); 1005 rs = &ic->ic_sup_rates[mode]; 1006 for (i = 0; i < rs->rs_nrates; i++) { 1007 mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode); 1008 if (mword == 0) 1009 continue; 1010 rate = ieee80211_media2rate(mword); 1011 printf("%s%d%sMbps", (i != 0 ? " " : ""), 1012 rate / 2, ((rate & 0x1) != 0 ? ".5" : "")); 1013 } 1014 printf("\n"); 1015 } 1016 ieee80211_ht_announce(ic); 1017} 1018 1019void 1020ieee80211_announce_channels(struct ieee80211com *ic) 1021{ 1022 const struct ieee80211_channel *c; 1023 char type; 1024 int i, cw; 1025 1026 printf("Chan Freq CW RegPwr MinPwr MaxPwr\n"); 1027 for (i = 0; i < ic->ic_nchans; i++) { 1028 c = &ic->ic_channels[i]; 1029 if (IEEE80211_IS_CHAN_ST(c)) 1030 type = 'S'; 1031 else if (IEEE80211_IS_CHAN_108A(c)) 1032 type = 'T'; 1033 else if (IEEE80211_IS_CHAN_108G(c)) 1034 type = 'G'; 1035 else if (IEEE80211_IS_CHAN_HT(c)) 1036 type = 'n'; 1037 else if (IEEE80211_IS_CHAN_A(c)) 1038 type = 'a'; 1039 else if (IEEE80211_IS_CHAN_ANYG(c)) 1040 type = 'g'; 1041 else if (IEEE80211_IS_CHAN_B(c)) 1042 type = 'b'; 1043 else 1044 type = 'f'; 1045 if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c)) 1046 cw = 40; 1047 else if (IEEE80211_IS_CHAN_HALF(c)) 1048 cw = 10; 1049 else if (IEEE80211_IS_CHAN_QUARTER(c)) 1050 cw = 5; 1051 else 1052 cw = 20; 1053 printf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n" 1054 , c->ic_ieee, c->ic_freq, type 1055 , cw 1056 , IEEE80211_IS_CHAN_HT40U(c) ? '+' : 1057 IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' ' 1058 , c->ic_maxregpower 1059 , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0 1060 , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0 1061 ); 1062 } 1063} 1064 1065static int 1066media2mode(const struct ifmedia_entry *ime, uint32_t flags, uint16_t *mode) 1067{ 1068 switch (IFM_MODE(ime->ifm_media)) { 1069 case IFM_IEEE80211_11A: 1070 *mode = IEEE80211_MODE_11A; 1071 break; 1072 case IFM_IEEE80211_11B: 1073 *mode = IEEE80211_MODE_11B; 1074 break; 1075 case IFM_IEEE80211_11G: 1076 *mode = IEEE80211_MODE_11G; 1077 break; 1078 case IFM_IEEE80211_FH: 1079 *mode = IEEE80211_MODE_FH; 1080 break; 1081 case IFM_IEEE80211_11NA: 1082 *mode = IEEE80211_MODE_11NA; 1083 break; 1084 case IFM_IEEE80211_11NG: 1085 *mode = IEEE80211_MODE_11NG; 1086 break; 1087 case IFM_AUTO: 1088 *mode = IEEE80211_MODE_AUTO; 1089 break; 1090 default: 1091 return 0; 1092 } 1093 /* 1094 * Turbo mode is an ``option''. 1095 * XXX does not apply to AUTO 1096 */ 1097 if (ime->ifm_media & IFM_IEEE80211_TURBO) { 1098 if (*mode == IEEE80211_MODE_11A) { 1099 if (flags & IEEE80211_F_TURBOP) 1100 *mode = IEEE80211_MODE_TURBO_A; 1101 else 1102 *mode = IEEE80211_MODE_STURBO_A; 1103 } else if (*mode == IEEE80211_MODE_11G) 1104 *mode = IEEE80211_MODE_TURBO_G; 1105 else 1106 return 0; 1107 } 1108 /* XXX HT40 +/- */ 1109 return 1; 1110} 1111 1112/* 1113 * Handle a media change request on the underlying interface. 1114 */ 1115int 1116ieee80211com_media_change(struct ifnet *ifp) 1117{ 1118 return EINVAL; 1119} 1120 1121/* 1122 * Handle a media change request on the vap interface. 1123 */ 1124int 1125ieee80211_media_change(struct ifnet *ifp) 1126{ 1127 struct ieee80211vap *vap = ifp->if_softc; 1128 struct ifmedia_entry *ime = vap->iv_media.ifm_cur; 1129 uint16_t newmode; 1130 1131 if (!media2mode(ime, vap->iv_flags, &newmode)) 1132 return EINVAL; 1133 if (vap->iv_des_mode != newmode) { 1134 vap->iv_des_mode = newmode; 1135 return ENETRESET; 1136 } 1137 return 0; 1138} 1139 1140/* 1141 * Common code to calculate the media status word 1142 * from the operating mode and channel state. 1143 */ 1144static int 1145media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan) 1146{ 1147 int status; 1148 1149 status = IFM_IEEE80211; 1150 switch (opmode) { 1151 case IEEE80211_M_STA: 1152 break; 1153 case IEEE80211_M_IBSS: 1154 status |= IFM_IEEE80211_ADHOC; 1155 break; 1156 case IEEE80211_M_HOSTAP: 1157 status |= IFM_IEEE80211_HOSTAP; 1158 break; 1159 case IEEE80211_M_MONITOR: 1160 status |= IFM_IEEE80211_MONITOR; 1161 break; 1162 case IEEE80211_M_AHDEMO: 1163 status |= IFM_IEEE80211_ADHOC | IFM_FLAG0; 1164 break; 1165 case IEEE80211_M_WDS: 1166 status |= IFM_IEEE80211_WDS; 1167 break; 1168 } 1169 if (IEEE80211_IS_CHAN_HTA(chan)) { 1170 status |= IFM_IEEE80211_11NA; 1171 } else if (IEEE80211_IS_CHAN_HTG(chan)) { 1172 status |= IFM_IEEE80211_11NG; 1173 } else if (IEEE80211_IS_CHAN_A(chan)) { 1174 status |= IFM_IEEE80211_11A; 1175 } else if (IEEE80211_IS_CHAN_B(chan)) { 1176 status |= IFM_IEEE80211_11B; 1177 } else if (IEEE80211_IS_CHAN_ANYG(chan)) { 1178 status |= IFM_IEEE80211_11G; 1179 } else if (IEEE80211_IS_CHAN_FHSS(chan)) { 1180 status |= IFM_IEEE80211_FH; 1181 } 1182 /* XXX else complain? */ 1183 1184 if (IEEE80211_IS_CHAN_TURBO(chan)) 1185 status |= IFM_IEEE80211_TURBO; 1186#if 0 1187 if (IEEE80211_IS_CHAN_HT20(chan)) 1188 status |= IFM_IEEE80211_HT20; 1189 if (IEEE80211_IS_CHAN_HT40(chan)) 1190 status |= IFM_IEEE80211_HT40; 1191#endif 1192 return status; 1193} 1194 1195static void 1196ieee80211com_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1197{ 1198 struct ieee80211com *ic = ifp->if_l2com; 1199 struct ieee80211vap *vap; 1200 1201 imr->ifm_status = IFM_AVALID; 1202 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1203 if (vap->iv_ifp->if_flags & IFF_UP) { 1204 imr->ifm_status |= IFM_ACTIVE; 1205 break; 1206 } 1207 imr->ifm_active = media_status(ic->ic_opmode, ic->ic_curchan); 1208 if (imr->ifm_status & IFM_ACTIVE) 1209 imr->ifm_current = imr->ifm_active; 1210} 1211 1212void 1213ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1214{ 1215 struct ieee80211vap *vap = ifp->if_softc; 1216 struct ieee80211com *ic = vap->iv_ic; 1217 enum ieee80211_phymode mode; 1218 1219 imr->ifm_status = IFM_AVALID; 1220 /* 1221 * NB: use the current channel's mode to lock down a xmit 1222 * rate only when running; otherwise we may have a mismatch 1223 * in which case the rate will not be convertible. 1224 */ 1225 if (vap->iv_state == IEEE80211_S_RUN) { 1226 imr->ifm_status |= IFM_ACTIVE; 1227 mode = ieee80211_chan2mode(ic->ic_curchan); 1228 } else 1229 mode = IEEE80211_MODE_AUTO; 1230 imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan); 1231 /* 1232 * Calculate a current rate if possible. 1233 */ 1234 if (vap->iv_txparms[mode].ucastrate != IEEE80211_FIXED_RATE_NONE) { 1235 /* 1236 * A fixed rate is set, report that. 1237 */ 1238 imr->ifm_active |= ieee80211_rate2media(ic, 1239 vap->iv_txparms[mode].ucastrate, mode); 1240 } else if (vap->iv_opmode == IEEE80211_M_STA) { 1241 /* 1242 * In station mode report the current transmit rate. 1243 */ 1244 imr->ifm_active |= ieee80211_rate2media(ic, 1245 vap->iv_bss->ni_txrate, mode); 1246 } else 1247 imr->ifm_active |= IFM_AUTO; 1248 if (imr->ifm_status & IFM_ACTIVE) 1249 imr->ifm_current = imr->ifm_active; 1250} 1251 1252/* 1253 * Set the current phy mode and recalculate the active channel 1254 * set based on the available channels for this mode. Also 1255 * select a new default/current channel if the current one is 1256 * inappropriate for this mode. 1257 */ 1258int 1259ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode) 1260{ 1261 /* 1262 * Adjust basic rates in 11b/11g supported rate set. 1263 * Note that if operating on a hal/quarter rate channel 1264 * this is a noop as those rates sets are different 1265 * and used instead. 1266 */ 1267 if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B) 1268 ieee80211_setbasicrates(&ic->ic_sup_rates[mode], mode); 1269 1270 ic->ic_curmode = mode; 1271 ieee80211_reset_erp(ic); /* reset ERP state */ 1272 1273 return 0; 1274} 1275 1276/* 1277 * Return the phy mode for with the specified channel. 1278 */ 1279enum ieee80211_phymode 1280ieee80211_chan2mode(const struct ieee80211_channel *chan) 1281{ 1282 1283 if (IEEE80211_IS_CHAN_HTA(chan)) 1284 return IEEE80211_MODE_11NA; 1285 else if (IEEE80211_IS_CHAN_HTG(chan)) 1286 return IEEE80211_MODE_11NG; 1287 else if (IEEE80211_IS_CHAN_108G(chan)) 1288 return IEEE80211_MODE_TURBO_G; 1289 else if (IEEE80211_IS_CHAN_ST(chan)) 1290 return IEEE80211_MODE_STURBO_A; 1291 else if (IEEE80211_IS_CHAN_TURBO(chan)) 1292 return IEEE80211_MODE_TURBO_A; 1293 else if (IEEE80211_IS_CHAN_A(chan)) 1294 return IEEE80211_MODE_11A; 1295 else if (IEEE80211_IS_CHAN_ANYG(chan)) 1296 return IEEE80211_MODE_11G; 1297 else if (IEEE80211_IS_CHAN_B(chan)) 1298 return IEEE80211_MODE_11B; 1299 else if (IEEE80211_IS_CHAN_FHSS(chan)) 1300 return IEEE80211_MODE_FH; 1301 1302 /* NB: should not get here */ 1303 printf("%s: cannot map channel to mode; freq %u flags 0x%x\n", 1304 __func__, chan->ic_freq, chan->ic_flags); 1305 return IEEE80211_MODE_11B; 1306} 1307 1308struct ratemedia { 1309 u_int match; /* rate + mode */ 1310 u_int media; /* if_media rate */ 1311}; 1312 1313static int 1314findmedia(const struct ratemedia rates[], int n, u_int match) 1315{ 1316 int i; 1317 1318 for (i = 0; i < n; i++) 1319 if (rates[i].match == match) 1320 return rates[i].media; 1321 return IFM_AUTO; 1322} 1323 1324/* 1325 * Convert IEEE80211 rate value to ifmedia subtype. 1326 * Rate is either a legacy rate in units of 0.5Mbps 1327 * or an MCS index. 1328 */ 1329int 1330ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode) 1331{ 1332#define N(a) (sizeof(a) / sizeof(a[0])) 1333 static const struct ratemedia rates[] = { 1334 { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 }, 1335 { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 }, 1336 { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 }, 1337 { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 }, 1338 { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 }, 1339 { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 }, 1340 { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 }, 1341 { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 }, 1342 { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 }, 1343 { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 }, 1344 { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 }, 1345 { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 }, 1346 { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 }, 1347 { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 }, 1348 { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 }, 1349 { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 }, 1350 { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 }, 1351 { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 }, 1352 { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 }, 1353 { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 }, 1354 { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 }, 1355 { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 }, 1356 { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 }, 1357 { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 }, 1358 { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 }, 1359 { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 }, 1360 { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 }, 1361 { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 }, 1362 { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 }, 1363 { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 }, 1364 /* NB: OFDM72 doesn't realy exist so we don't handle it */ 1365 }; 1366 static const struct ratemedia htrates[] = { 1367 { 0, IFM_IEEE80211_MCS }, 1368 { 1, IFM_IEEE80211_MCS }, 1369 { 2, IFM_IEEE80211_MCS }, 1370 { 3, IFM_IEEE80211_MCS }, 1371 { 4, IFM_IEEE80211_MCS }, 1372 { 5, IFM_IEEE80211_MCS }, 1373 { 6, IFM_IEEE80211_MCS }, 1374 { 7, IFM_IEEE80211_MCS }, 1375 { 8, IFM_IEEE80211_MCS }, 1376 { 9, IFM_IEEE80211_MCS }, 1377 { 10, IFM_IEEE80211_MCS }, 1378 { 11, IFM_IEEE80211_MCS }, 1379 { 12, IFM_IEEE80211_MCS }, 1380 { 13, IFM_IEEE80211_MCS }, 1381 { 14, IFM_IEEE80211_MCS }, 1382 { 15, IFM_IEEE80211_MCS }, 1383 }; 1384 int m; 1385 1386 /* 1387 * Check 11n rates first for match as an MCS. 1388 */ 1389 if (mode == IEEE80211_MODE_11NA) { 1390 if (rate & IEEE80211_RATE_MCS) { 1391 rate &= ~IEEE80211_RATE_MCS; 1392 m = findmedia(htrates, N(htrates), rate); 1393 if (m != IFM_AUTO) 1394 return m | IFM_IEEE80211_11NA; 1395 } 1396 } else if (mode == IEEE80211_MODE_11NG) { 1397 /* NB: 12 is ambiguous, it will be treated as an MCS */ 1398 if (rate & IEEE80211_RATE_MCS) { 1399 rate &= ~IEEE80211_RATE_MCS; 1400 m = findmedia(htrates, N(htrates), rate); 1401 if (m != IFM_AUTO) 1402 return m | IFM_IEEE80211_11NG; 1403 } 1404 } 1405 rate &= IEEE80211_RATE_VAL; 1406 switch (mode) { 1407 case IEEE80211_MODE_11A: 1408 case IEEE80211_MODE_11NA: 1409 case IEEE80211_MODE_TURBO_A: 1410 case IEEE80211_MODE_STURBO_A: 1411 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11A); 1412 case IEEE80211_MODE_11B: 1413 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11B); 1414 case IEEE80211_MODE_FH: 1415 return findmedia(rates, N(rates), rate | IFM_IEEE80211_FH); 1416 case IEEE80211_MODE_AUTO: 1417 /* NB: ic may be NULL for some drivers */ 1418 if (ic && ic->ic_phytype == IEEE80211_T_FH) 1419 return findmedia(rates, N(rates), 1420 rate | IFM_IEEE80211_FH); 1421 /* NB: hack, 11g matches both 11b+11a rates */ 1422 /* fall thru... */ 1423 case IEEE80211_MODE_11G: 1424 case IEEE80211_MODE_11NG: 1425 case IEEE80211_MODE_TURBO_G: 1426 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11G); 1427 } 1428 return IFM_AUTO; 1429#undef N 1430} 1431 1432int 1433ieee80211_media2rate(int mword) 1434{ 1435#define N(a) (sizeof(a) / sizeof(a[0])) 1436 static const int ieeerates[] = { 1437 -1, /* IFM_AUTO */ 1438 0, /* IFM_MANUAL */ 1439 0, /* IFM_NONE */ 1440 2, /* IFM_IEEE80211_FH1 */ 1441 4, /* IFM_IEEE80211_FH2 */ 1442 2, /* IFM_IEEE80211_DS1 */ 1443 4, /* IFM_IEEE80211_DS2 */ 1444 11, /* IFM_IEEE80211_DS5 */ 1445 22, /* IFM_IEEE80211_DS11 */ 1446 44, /* IFM_IEEE80211_DS22 */ 1447 12, /* IFM_IEEE80211_OFDM6 */ 1448 18, /* IFM_IEEE80211_OFDM9 */ 1449 24, /* IFM_IEEE80211_OFDM12 */ 1450 36, /* IFM_IEEE80211_OFDM18 */ 1451 48, /* IFM_IEEE80211_OFDM24 */ 1452 72, /* IFM_IEEE80211_OFDM36 */ 1453 96, /* IFM_IEEE80211_OFDM48 */ 1454 108, /* IFM_IEEE80211_OFDM54 */ 1455 144, /* IFM_IEEE80211_OFDM72 */ 1456 0, /* IFM_IEEE80211_DS354k */ 1457 0, /* IFM_IEEE80211_DS512k */ 1458 6, /* IFM_IEEE80211_OFDM3 */ 1459 9, /* IFM_IEEE80211_OFDM4 */ 1460 54, /* IFM_IEEE80211_OFDM27 */ 1461 -1, /* IFM_IEEE80211_MCS */ 1462 }; 1463 return IFM_SUBTYPE(mword) < N(ieeerates) ? 1464 ieeerates[IFM_SUBTYPE(mword)] : 0; 1465#undef N 1466} 1467