ieee80211.c revision 193292
1/*- 2 * Copyright (c) 2001 Atsushi Onoe 3 * Copyright (c) 2002-2009 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 193292 2009-06-02 00:33:28Z 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#ifdef IEEE80211_SUPPORT_SUPERG 50#include <net80211/ieee80211_superg.h> 51#endif 52 53#include <net/bpf.h> 54 55const char *ieee80211_phymode_name[IEEE80211_MODE_MAX] = { 56 [IEEE80211_MODE_AUTO] = "auto", 57 [IEEE80211_MODE_11A] = "11a", 58 [IEEE80211_MODE_11B] = "11b", 59 [IEEE80211_MODE_11G] = "11g", 60 [IEEE80211_MODE_FH] = "FH", 61 [IEEE80211_MODE_TURBO_A] = "turboA", 62 [IEEE80211_MODE_TURBO_G] = "turboG", 63 [IEEE80211_MODE_STURBO_A] = "sturboA", 64 [IEEE80211_MODE_HALF] = "half", 65 [IEEE80211_MODE_QUARTER] = "quarter", 66 [IEEE80211_MODE_11NA] = "11na", 67 [IEEE80211_MODE_11NG] = "11ng", 68}; 69/* map ieee80211_opmode to the corresponding capability bit */ 70const int ieee80211_opcap[IEEE80211_OPMODE_MAX] = { 71 [IEEE80211_M_IBSS] = IEEE80211_C_IBSS, 72 [IEEE80211_M_WDS] = IEEE80211_C_WDS, 73 [IEEE80211_M_STA] = IEEE80211_C_STA, 74 [IEEE80211_M_AHDEMO] = IEEE80211_C_AHDEMO, 75 [IEEE80211_M_HOSTAP] = IEEE80211_C_HOSTAP, 76 [IEEE80211_M_MONITOR] = IEEE80211_C_MONITOR, 77}; 78 79static const uint8_t ieee80211broadcastaddr[IEEE80211_ADDR_LEN] = 80 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 81 82static void ieee80211_syncflag_locked(struct ieee80211com *ic, int flag); 83static void ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag); 84static int ieee80211_media_setup(struct ieee80211com *ic, 85 struct ifmedia *media, int caps, int addsta, 86 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat); 87static void ieee80211com_media_status(struct ifnet *, struct ifmediareq *); 88static int ieee80211com_media_change(struct ifnet *); 89static int media_status(enum ieee80211_opmode, 90 const struct ieee80211_channel *); 91 92MALLOC_DEFINE(M_80211_VAP, "80211vap", "802.11 vap state"); 93 94/* 95 * Default supported rates for 802.11 operation (in IEEE .5Mb units). 96 */ 97#define B(r) ((r) | IEEE80211_RATE_BASIC) 98static const struct ieee80211_rateset ieee80211_rateset_11a = 99 { 8, { B(12), 18, B(24), 36, B(48), 72, 96, 108 } }; 100static const struct ieee80211_rateset ieee80211_rateset_half = 101 { 8, { B(6), 9, B(12), 18, B(24), 36, 48, 54 } }; 102static const struct ieee80211_rateset ieee80211_rateset_quarter = 103 { 8, { B(3), 4, B(6), 9, B(12), 18, 24, 27 } }; 104static const struct ieee80211_rateset ieee80211_rateset_11b = 105 { 4, { B(2), B(4), B(11), B(22) } }; 106/* NB: OFDM rates are handled specially based on mode */ 107static const struct ieee80211_rateset ieee80211_rateset_11g = 108 { 12, { B(2), B(4), B(11), B(22), 12, 18, 24, 36, 48, 72, 96, 108 } }; 109#undef B 110 111/* 112 * Fill in 802.11 available channel set, mark 113 * all available channels as active, and pick 114 * a default channel if not already specified. 115 */ 116static void 117ieee80211_chan_init(struct ieee80211com *ic) 118{ 119#define DEFAULTRATES(m, def) do { \ 120 if (ic->ic_sup_rates[m].rs_nrates == 0) \ 121 ic->ic_sup_rates[m] = def; \ 122} while (0) 123 struct ieee80211_channel *c; 124 int i; 125 126 KASSERT(0 < ic->ic_nchans && ic->ic_nchans <= IEEE80211_CHAN_MAX, 127 ("invalid number of channels specified: %u", ic->ic_nchans)); 128 memset(ic->ic_chan_avail, 0, sizeof(ic->ic_chan_avail)); 129 memset(ic->ic_modecaps, 0, sizeof(ic->ic_modecaps)); 130 setbit(ic->ic_modecaps, IEEE80211_MODE_AUTO); 131 for (i = 0; i < ic->ic_nchans; i++) { 132 c = &ic->ic_channels[i]; 133 KASSERT(c->ic_flags != 0, ("channel with no flags")); 134 /* 135 * Help drivers that work only with frequencies by filling 136 * in IEEE channel #'s if not already calculated. Note this 137 * mimics similar work done in ieee80211_setregdomain when 138 * changing regulatory state. 139 */ 140 if (c->ic_ieee == 0) 141 c->ic_ieee = ieee80211_mhz2ieee(c->ic_freq,c->ic_flags); 142 if (IEEE80211_IS_CHAN_HT40(c) && c->ic_extieee == 0) 143 c->ic_extieee = ieee80211_mhz2ieee(c->ic_freq + 144 (IEEE80211_IS_CHAN_HT40U(c) ? 20 : -20), 145 c->ic_flags); 146 /* default max tx power to max regulatory */ 147 if (c->ic_maxpower == 0) 148 c->ic_maxpower = 2*c->ic_maxregpower; 149 setbit(ic->ic_chan_avail, c->ic_ieee); 150 /* 151 * Identify mode capabilities. 152 */ 153 if (IEEE80211_IS_CHAN_A(c)) 154 setbit(ic->ic_modecaps, IEEE80211_MODE_11A); 155 if (IEEE80211_IS_CHAN_B(c)) 156 setbit(ic->ic_modecaps, IEEE80211_MODE_11B); 157 if (IEEE80211_IS_CHAN_ANYG(c)) 158 setbit(ic->ic_modecaps, IEEE80211_MODE_11G); 159 if (IEEE80211_IS_CHAN_FHSS(c)) 160 setbit(ic->ic_modecaps, IEEE80211_MODE_FH); 161 if (IEEE80211_IS_CHAN_108A(c)) 162 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_A); 163 if (IEEE80211_IS_CHAN_108G(c)) 164 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_G); 165 if (IEEE80211_IS_CHAN_ST(c)) 166 setbit(ic->ic_modecaps, IEEE80211_MODE_STURBO_A); 167 if (IEEE80211_IS_CHAN_HALF(c)) 168 setbit(ic->ic_modecaps, IEEE80211_MODE_HALF); 169 if (IEEE80211_IS_CHAN_QUARTER(c)) 170 setbit(ic->ic_modecaps, IEEE80211_MODE_QUARTER); 171 if (IEEE80211_IS_CHAN_HTA(c)) 172 setbit(ic->ic_modecaps, IEEE80211_MODE_11NA); 173 if (IEEE80211_IS_CHAN_HTG(c)) 174 setbit(ic->ic_modecaps, IEEE80211_MODE_11NG); 175 } 176 /* initialize candidate channels to all available */ 177 memcpy(ic->ic_chan_active, ic->ic_chan_avail, 178 sizeof(ic->ic_chan_avail)); 179 180 /* sort channel table to allow lookup optimizations */ 181 ieee80211_sort_channels(ic->ic_channels, ic->ic_nchans); 182 183 /* invalidate any previous state */ 184 ic->ic_bsschan = IEEE80211_CHAN_ANYC; 185 ic->ic_prevchan = NULL; 186 ic->ic_csa_newchan = NULL; 187 /* arbitrarily pick the first channel */ 188 ic->ic_curchan = &ic->ic_channels[0]; 189 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 190 191 /* fillin well-known rate sets if driver has not specified */ 192 DEFAULTRATES(IEEE80211_MODE_11B, ieee80211_rateset_11b); 193 DEFAULTRATES(IEEE80211_MODE_11G, ieee80211_rateset_11g); 194 DEFAULTRATES(IEEE80211_MODE_11A, ieee80211_rateset_11a); 195 DEFAULTRATES(IEEE80211_MODE_TURBO_A, ieee80211_rateset_11a); 196 DEFAULTRATES(IEEE80211_MODE_TURBO_G, ieee80211_rateset_11g); 197 DEFAULTRATES(IEEE80211_MODE_STURBO_A, ieee80211_rateset_11a); 198 DEFAULTRATES(IEEE80211_MODE_HALF, ieee80211_rateset_half); 199 DEFAULTRATES(IEEE80211_MODE_QUARTER, ieee80211_rateset_quarter); 200 DEFAULTRATES(IEEE80211_MODE_11NA, ieee80211_rateset_11a); 201 DEFAULTRATES(IEEE80211_MODE_11NG, ieee80211_rateset_11g); 202 203 /* 204 * Set auto mode to reset active channel state and any desired channel. 205 */ 206 (void) ieee80211_setmode(ic, IEEE80211_MODE_AUTO); 207#undef DEFAULTRATES 208} 209 210static void 211null_update_mcast(struct ifnet *ifp) 212{ 213 if_printf(ifp, "need multicast update callback\n"); 214} 215 216static void 217null_update_promisc(struct ifnet *ifp) 218{ 219 if_printf(ifp, "need promiscuous mode update callback\n"); 220} 221 222static int 223null_output(struct ifnet *ifp, struct mbuf *m, 224 struct sockaddr *dst, struct route *ro) 225{ 226 if_printf(ifp, "discard raw packet\n"); 227 m_freem(m); 228 return EIO; 229} 230 231static void 232null_input(struct ifnet *ifp, struct mbuf *m) 233{ 234 if_printf(ifp, "if_input should not be called\n"); 235 m_freem(m); 236} 237 238/* 239 * Attach/setup the common net80211 state. Called by 240 * the driver on attach to prior to creating any vap's. 241 */ 242void 243ieee80211_ifattach(struct ieee80211com *ic, 244 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 245{ 246 struct ifnet *ifp = ic->ic_ifp; 247 struct sockaddr_dl *sdl; 248 struct ifaddr *ifa; 249 250 KASSERT(ifp->if_type == IFT_IEEE80211, ("if_type %d", ifp->if_type)); 251 252 IEEE80211_LOCK_INIT(ic, ifp->if_xname); 253 TAILQ_INIT(&ic->ic_vaps); 254 255 /* Create a taskqueue for all state changes */ 256 ic->ic_tq = taskqueue_create("ic_taskq", M_WAITOK | M_ZERO, 257 taskqueue_thread_enqueue, &ic->ic_tq); 258 taskqueue_start_threads(&ic->ic_tq, 1, PI_NET, "%s taskq", 259 ifp->if_xname); 260 /* 261 * Fill in 802.11 available channel set, mark all 262 * available channels as active, and pick a default 263 * channel if not already specified. 264 */ 265 ieee80211_media_init(ic); 266 267 ic->ic_update_mcast = null_update_mcast; 268 ic->ic_update_promisc = null_update_promisc; 269 270 ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT; 271 ic->ic_lintval = ic->ic_bintval; 272 ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX; 273 274 ieee80211_crypto_attach(ic); 275 ieee80211_node_attach(ic); 276 ieee80211_power_attach(ic); 277 ieee80211_proto_attach(ic); 278#ifdef IEEE80211_SUPPORT_SUPERG 279 ieee80211_superg_attach(ic); 280#endif 281 ieee80211_ht_attach(ic); 282 ieee80211_scan_attach(ic); 283 ieee80211_regdomain_attach(ic); 284 285 ieee80211_sysctl_attach(ic); 286 287 ifp->if_addrlen = IEEE80211_ADDR_LEN; 288 ifp->if_hdrlen = 0; 289 if_attach(ifp); 290 ifp->if_mtu = IEEE80211_MTU_MAX; 291 ifp->if_broadcastaddr = ieee80211broadcastaddr; 292 ifp->if_output = null_output; 293 ifp->if_input = null_input; /* just in case */ 294 ifp->if_resolvemulti = NULL; /* NB: callers check */ 295 296 ifa = ifaddr_byindex(ifp->if_index); 297 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); 298 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 299 sdl->sdl_type = IFT_ETHER; /* XXX IFT_IEEE80211? */ 300 sdl->sdl_alen = IEEE80211_ADDR_LEN; 301 IEEE80211_ADDR_COPY(LLADDR(sdl), macaddr); 302} 303 304/* 305 * Detach net80211 state on device detach. Tear down 306 * all vap's and reclaim all common state prior to the 307 * device state going away. Note we may call back into 308 * driver; it must be prepared for this. 309 */ 310void 311ieee80211_ifdetach(struct ieee80211com *ic) 312{ 313 struct ifnet *ifp = ic->ic_ifp; 314 struct ieee80211vap *vap; 315 316 while ((vap = TAILQ_FIRST(&ic->ic_vaps)) != NULL) 317 ieee80211_vap_destroy(vap); 318 ieee80211_waitfor_parent(ic); 319 320 ieee80211_sysctl_detach(ic); 321 ieee80211_regdomain_detach(ic); 322 ieee80211_scan_detach(ic); 323#ifdef IEEE80211_SUPPORT_SUPERG 324 ieee80211_superg_detach(ic); 325#endif 326 ieee80211_ht_detach(ic); 327 /* NB: must be called before ieee80211_node_detach */ 328 ieee80211_proto_detach(ic); 329 ieee80211_crypto_detach(ic); 330 ieee80211_power_detach(ic); 331 ieee80211_node_detach(ic); 332 ifmedia_removeall(&ic->ic_media); 333 334 taskqueue_free(ic->ic_tq); 335 IEEE80211_LOCK_DESTROY(ic); 336 if_detach(ifp); 337} 338 339/* 340 * Default reset method for use with the ioctl support. This 341 * method is invoked after any state change in the 802.11 342 * layer that should be propagated to the hardware but not 343 * require re-initialization of the 802.11 state machine (e.g 344 * rescanning for an ap). We always return ENETRESET which 345 * should cause the driver to re-initialize the device. Drivers 346 * can override this method to implement more optimized support. 347 */ 348static int 349default_reset(struct ieee80211vap *vap, u_long cmd) 350{ 351 return ENETRESET; 352} 353 354/* 355 * Prepare a vap for use. Drivers use this call to 356 * setup net80211 state in new vap's prior attaching 357 * them with ieee80211_vap_attach (below). 358 */ 359int 360ieee80211_vap_setup(struct ieee80211com *ic, struct ieee80211vap *vap, 361 const char name[IFNAMSIZ], int unit, int opmode, int flags, 362 const uint8_t bssid[IEEE80211_ADDR_LEN], 363 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 364{ 365 struct ifnet *ifp; 366 367 ifp = if_alloc(IFT_ETHER); 368 if (ifp == NULL) { 369 if_printf(ic->ic_ifp, "%s: unable to allocate ifnet\n", 370 __func__); 371 return ENOMEM; 372 } 373 if_initname(ifp, name, unit); 374 ifp->if_softc = vap; /* back pointer */ 375 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 376 ifp->if_start = ieee80211_start; 377 ifp->if_ioctl = ieee80211_ioctl; 378 ifp->if_watchdog = NULL; /* NB: no watchdog routine */ 379 ifp->if_init = ieee80211_init; 380 /* NB: input+output filled in by ether_ifattach */ 381 IFQ_SET_MAXLEN(&ifp->if_snd, IFQ_MAXLEN); 382 ifp->if_snd.ifq_drv_maxlen = IFQ_MAXLEN; 383 IFQ_SET_READY(&ifp->if_snd); 384 385 vap->iv_ifp = ifp; 386 vap->iv_ic = ic; 387 vap->iv_flags = ic->ic_flags; /* propagate common flags */ 388 vap->iv_flags_ext = ic->ic_flags_ext; 389 vap->iv_flags_ven = ic->ic_flags_ven; 390 vap->iv_caps = ic->ic_caps &~ IEEE80211_C_OPMODE; 391 vap->iv_htcaps = ic->ic_htcaps; 392 vap->iv_opmode = opmode; 393 vap->iv_caps |= ieee80211_opcap[opmode]; 394 switch (opmode) { 395 case IEEE80211_M_WDS: 396 /* 397 * WDS links must specify the bssid of the far end. 398 * For legacy operation this is a static relationship. 399 * For non-legacy operation the station must associate 400 * and be authorized to pass traffic. Plumbing the 401 * vap to the proper node happens when the vap 402 * transitions to RUN state. 403 */ 404 IEEE80211_ADDR_COPY(vap->iv_des_bssid, bssid); 405 vap->iv_flags |= IEEE80211_F_DESBSSID; 406 if (flags & IEEE80211_CLONE_WDSLEGACY) 407 vap->iv_flags_ext |= IEEE80211_FEXT_WDSLEGACY; 408 break; 409#ifdef IEEE80211_SUPPORT_TDMA 410 case IEEE80211_M_AHDEMO: 411 if (flags & IEEE80211_CLONE_TDMA) { 412 /* NB: checked before clone operation allowed */ 413 KASSERT(ic->ic_caps & IEEE80211_C_TDMA, 414 ("not TDMA capable, ic_caps 0x%x", ic->ic_caps)); 415 /* 416 * Propagate TDMA capability to mark vap; this 417 * cannot be removed and is used to distinguish 418 * regular ahdemo operation from ahdemo+tdma. 419 */ 420 vap->iv_caps |= IEEE80211_C_TDMA; 421 } 422 break; 423#endif 424 } 425 /* auto-enable s/w beacon miss support */ 426 if (flags & IEEE80211_CLONE_NOBEACONS) 427 vap->iv_flags_ext |= IEEE80211_FEXT_SWBMISS; 428 /* 429 * Enable various functionality by default if we're 430 * capable; the driver can override us if it knows better. 431 */ 432 if (vap->iv_caps & IEEE80211_C_WME) 433 vap->iv_flags |= IEEE80211_F_WME; 434 if (vap->iv_caps & IEEE80211_C_BURST) 435 vap->iv_flags |= IEEE80211_F_BURST; 436 /* NB: bg scanning only makes sense for station mode right now */ 437 if (vap->iv_opmode == IEEE80211_M_STA && 438 (vap->iv_caps & IEEE80211_C_BGSCAN)) 439 vap->iv_flags |= IEEE80211_F_BGSCAN; 440 vap->iv_flags |= IEEE80211_F_DOTH; /* XXX no cap, just ena */ 441 /* NB: DFS support only makes sense for ap mode right now */ 442 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 443 (vap->iv_caps & IEEE80211_C_DFS)) 444 vap->iv_flags_ext |= IEEE80211_FEXT_DFS; 445 446 vap->iv_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */ 447 vap->iv_bmissthreshold = IEEE80211_HWBMISS_DEFAULT; 448 vap->iv_dtim_period = IEEE80211_DTIM_DEFAULT; 449 /* 450 * Install a default reset method for the ioctl support; 451 * the driver can override this. 452 */ 453 vap->iv_reset = default_reset; 454 455 IEEE80211_ADDR_COPY(vap->iv_myaddr, macaddr); 456 457 ieee80211_sysctl_vattach(vap); 458 ieee80211_crypto_vattach(vap); 459 ieee80211_node_vattach(vap); 460 ieee80211_power_vattach(vap); 461 ieee80211_proto_vattach(vap); 462#ifdef IEEE80211_SUPPORT_SUPERG 463 ieee80211_superg_vattach(vap); 464#endif 465 ieee80211_ht_vattach(vap); 466 ieee80211_scan_vattach(vap); 467 ieee80211_regdomain_vattach(vap); 468 ieee80211_radiotap_vattach(vap); 469 470 return 0; 471} 472 473/* 474 * Activate a vap. State should have been prepared with a 475 * call to ieee80211_vap_setup and by the driver. On return 476 * from this call the vap is ready for use. 477 */ 478int 479ieee80211_vap_attach(struct ieee80211vap *vap, 480 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) 481{ 482 struct ifnet *ifp = vap->iv_ifp; 483 struct ieee80211com *ic = vap->iv_ic; 484 struct ifmediareq imr; 485 int maxrate; 486 487 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 488 "%s: %s parent %s flags 0x%x flags_ext 0x%x\n", 489 __func__, ieee80211_opmode_name[vap->iv_opmode], 490 ic->ic_ifp->if_xname, vap->iv_flags, vap->iv_flags_ext); 491 492 /* 493 * Do late attach work that cannot happen until after 494 * the driver has had a chance to override defaults. 495 */ 496 ieee80211_node_latevattach(vap); 497 ieee80211_power_latevattach(vap); 498 499 maxrate = ieee80211_media_setup(ic, &vap->iv_media, vap->iv_caps, 500 vap->iv_opmode == IEEE80211_M_STA, media_change, media_stat); 501 ieee80211_media_status(ifp, &imr); 502 /* NB: strip explicit mode; we're actually in autoselect */ 503 ifmedia_set(&vap->iv_media, 504 imr.ifm_active &~ (IFM_MMASK | IFM_IEEE80211_TURBO)); 505 if (maxrate) 506 ifp->if_baudrate = IF_Mbps(maxrate); 507 508 ether_ifattach(ifp, vap->iv_myaddr); 509 /* hook output method setup by ether_ifattach */ 510 vap->iv_output = ifp->if_output; 511 ifp->if_output = ieee80211_output; 512 /* NB: if_mtu set by ether_ifattach to ETHERMTU */ 513 514 IEEE80211_LOCK(ic); 515 TAILQ_INSERT_TAIL(&ic->ic_vaps, vap, iv_next); 516 ieee80211_syncflag_locked(ic, IEEE80211_F_WME); 517#ifdef IEEE80211_SUPPORT_SUPERG 518 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); 519#endif 520 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); 521 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); 522 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_HT); 523 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_USEHT40); 524 ieee80211_syncifflag_locked(ic, IFF_PROMISC); 525 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI); 526 IEEE80211_UNLOCK(ic); 527 528 return 1; 529} 530 531/* 532 * Tear down vap state and reclaim the ifnet. 533 * The driver is assumed to have prepared for 534 * this; e.g. by turning off interrupts for the 535 * underlying device. 536 */ 537void 538ieee80211_vap_detach(struct ieee80211vap *vap) 539{ 540 struct ieee80211com *ic = vap->iv_ic; 541 struct ifnet *ifp = vap->iv_ifp; 542 543 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s parent %s\n", 544 __func__, ieee80211_opmode_name[vap->iv_opmode], 545 ic->ic_ifp->if_xname); 546 547 IEEE80211_LOCK(ic); 548 /* block traffic from above */ 549 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 550 /* 551 * Evil hack. Clear the backpointer from the ifnet to the 552 * vap so any requests from above will return an error or 553 * be ignored. In particular this short-circuits requests 554 * by the bridge to turn off promiscuous mode as a result 555 * of calling ether_ifdetach. 556 */ 557 ifp->if_softc = NULL; 558 /* 559 * Stop the vap before detaching the ifnet. Ideally we'd 560 * do this in the other order so the ifnet is inaccessible 561 * while we cleanup internal state but that is hard. 562 */ 563 ieee80211_stop_locked(vap); 564 IEEE80211_UNLOCK(ic); 565 566 /* 567 * Flush any deferred vap tasks. 568 * NB: must be before ether_ifdetach() and removal from ic_vaps list 569 */ 570 ieee80211_draintask(ic, &vap->iv_nstate_task); 571 ieee80211_draintask(ic, &vap->iv_swbmiss_task); 572 573 IEEE80211_LOCK(ic); 574 KASSERT(vap->iv_state == IEEE80211_S_INIT , ("vap still running")); 575 TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next); 576 ieee80211_syncflag_locked(ic, IEEE80211_F_WME); 577#ifdef IEEE80211_SUPPORT_SUPERG 578 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); 579#endif 580 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); 581 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); 582 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_HT); 583 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_USEHT40); 584 /* NB: this handles the bpfdetach done below */ 585 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_BPF); 586 ieee80211_syncifflag_locked(ic, IFF_PROMISC); 587 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI); 588 IEEE80211_UNLOCK(ic); 589 590 /* XXX can't hold com lock */ 591 /* NB: bpfdetach is called by ether_ifdetach and claims all taps */ 592 ether_ifdetach(ifp); 593 594 ifmedia_removeall(&vap->iv_media); 595 596 ieee80211_radiotap_vdetach(vap); 597 ieee80211_regdomain_vdetach(vap); 598 ieee80211_scan_vdetach(vap); 599#ifdef IEEE80211_SUPPORT_SUPERG 600 ieee80211_superg_vdetach(vap); 601#endif 602 ieee80211_ht_vdetach(vap); 603 /* NB: must be before ieee80211_node_vdetach */ 604 ieee80211_proto_vdetach(vap); 605 ieee80211_crypto_vdetach(vap); 606 ieee80211_power_vdetach(vap); 607 ieee80211_node_vdetach(vap); 608 ieee80211_sysctl_vdetach(vap); 609 610 if_free(ifp); 611} 612 613/* 614 * Synchronize flag bit state in the parent ifnet structure 615 * according to the state of all vap ifnet's. This is used, 616 * for example, to handle IFF_PROMISC and IFF_ALLMULTI. 617 */ 618void 619ieee80211_syncifflag_locked(struct ieee80211com *ic, int flag) 620{ 621 struct ifnet *ifp = ic->ic_ifp; 622 struct ieee80211vap *vap; 623 int bit, oflags; 624 625 IEEE80211_LOCK_ASSERT(ic); 626 627 bit = 0; 628 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 629 if (vap->iv_ifp->if_flags & flag) { 630 /* 631 * XXX the bridge sets PROMISC but we don't want to 632 * enable it on the device, discard here so all the 633 * drivers don't need to special-case it 634 */ 635 if (flag == IFF_PROMISC && 636 vap->iv_opmode == IEEE80211_M_HOSTAP) 637 continue; 638 bit = 1; 639 break; 640 } 641 oflags = ifp->if_flags; 642 if (bit) 643 ifp->if_flags |= flag; 644 else 645 ifp->if_flags &= ~flag; 646 if ((ifp->if_flags ^ oflags) & flag) { 647 /* XXX should we return 1/0 and let caller do this? */ 648 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 649 if (flag == IFF_PROMISC) 650 ieee80211_runtask(ic, &ic->ic_promisc_task); 651 else if (flag == IFF_ALLMULTI) 652 ieee80211_runtask(ic, &ic->ic_mcast_task); 653 } 654 } 655} 656 657/* 658 * Synchronize flag bit state in the com structure 659 * according to the state of all vap's. This is used, 660 * for example, to handle state changes via ioctls. 661 */ 662static void 663ieee80211_syncflag_locked(struct ieee80211com *ic, int flag) 664{ 665 struct ieee80211vap *vap; 666 int bit; 667 668 IEEE80211_LOCK_ASSERT(ic); 669 670 bit = 0; 671 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 672 if (vap->iv_flags & flag) { 673 bit = 1; 674 break; 675 } 676 if (bit) 677 ic->ic_flags |= flag; 678 else 679 ic->ic_flags &= ~flag; 680} 681 682void 683ieee80211_syncflag(struct ieee80211vap *vap, int flag) 684{ 685 struct ieee80211com *ic = vap->iv_ic; 686 687 IEEE80211_LOCK(ic); 688 if (flag < 0) { 689 flag = -flag; 690 vap->iv_flags &= ~flag; 691 } else 692 vap->iv_flags |= flag; 693 ieee80211_syncflag_locked(ic, flag); 694 IEEE80211_UNLOCK(ic); 695} 696 697/* 698 * Synchronize flag bit state in the com structure 699 * according to the state of all vap's. This is used, 700 * for example, to handle state changes via ioctls. 701 */ 702static void 703ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag) 704{ 705 struct ieee80211vap *vap; 706 int bit; 707 708 IEEE80211_LOCK_ASSERT(ic); 709 710 bit = 0; 711 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 712 if (vap->iv_flags_ext & flag) { 713 bit = 1; 714 break; 715 } 716 if (bit) 717 ic->ic_flags_ext |= flag; 718 else 719 ic->ic_flags_ext &= ~flag; 720} 721 722void 723ieee80211_syncflag_ext(struct ieee80211vap *vap, int flag) 724{ 725 struct ieee80211com *ic = vap->iv_ic; 726 727 IEEE80211_LOCK(ic); 728 if (flag < 0) { 729 flag = -flag; 730 vap->iv_flags_ext &= ~flag; 731 } else 732 vap->iv_flags_ext |= flag; 733 ieee80211_syncflag_ext_locked(ic, flag); 734 IEEE80211_UNLOCK(ic); 735} 736 737static __inline int 738mapgsm(u_int freq, u_int flags) 739{ 740 freq *= 10; 741 if (flags & IEEE80211_CHAN_QUARTER) 742 freq += 5; 743 else if (flags & IEEE80211_CHAN_HALF) 744 freq += 10; 745 else 746 freq += 20; 747 /* NB: there is no 907/20 wide but leave room */ 748 return (freq - 906*10) / 5; 749} 750 751static __inline int 752mappsb(u_int freq, u_int flags) 753{ 754 return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5; 755} 756 757/* 758 * Convert MHz frequency to IEEE channel number. 759 */ 760int 761ieee80211_mhz2ieee(u_int freq, u_int flags) 762{ 763#define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990) 764 if (flags & IEEE80211_CHAN_GSM) 765 return mapgsm(freq, flags); 766 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 767 if (freq == 2484) 768 return 14; 769 if (freq < 2484) 770 return ((int) freq - 2407) / 5; 771 else 772 return 15 + ((freq - 2512) / 20); 773 } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */ 774 if (freq <= 5000) { 775 /* XXX check regdomain? */ 776 if (IS_FREQ_IN_PSB(freq)) 777 return mappsb(freq, flags); 778 return (freq - 4000) / 5; 779 } else 780 return (freq - 5000) / 5; 781 } else { /* either, guess */ 782 if (freq == 2484) 783 return 14; 784 if (freq < 2484) { 785 if (907 <= freq && freq <= 922) 786 return mapgsm(freq, flags); 787 return ((int) freq - 2407) / 5; 788 } 789 if (freq < 5000) { 790 if (IS_FREQ_IN_PSB(freq)) 791 return mappsb(freq, flags); 792 else if (freq > 4900) 793 return (freq - 4000) / 5; 794 else 795 return 15 + ((freq - 2512) / 20); 796 } 797 return (freq - 5000) / 5; 798 } 799#undef IS_FREQ_IN_PSB 800} 801 802/* 803 * Convert channel to IEEE channel number. 804 */ 805int 806ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c) 807{ 808 if (c == NULL) { 809 if_printf(ic->ic_ifp, "invalid channel (NULL)\n"); 810 return 0; /* XXX */ 811 } 812 return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee); 813} 814 815/* 816 * Convert IEEE channel number to MHz frequency. 817 */ 818u_int 819ieee80211_ieee2mhz(u_int chan, u_int flags) 820{ 821 if (flags & IEEE80211_CHAN_GSM) 822 return 907 + 5 * (chan / 10); 823 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 824 if (chan == 14) 825 return 2484; 826 if (chan < 14) 827 return 2407 + chan*5; 828 else 829 return 2512 + ((chan-15)*20); 830 } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */ 831 if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) { 832 chan -= 37; 833 return 4940 + chan*5 + (chan % 5 ? 2 : 0); 834 } 835 return 5000 + (chan*5); 836 } else { /* either, guess */ 837 /* XXX can't distinguish PSB+GSM channels */ 838 if (chan == 14) 839 return 2484; 840 if (chan < 14) /* 0-13 */ 841 return 2407 + chan*5; 842 if (chan < 27) /* 15-26 */ 843 return 2512 + ((chan-15)*20); 844 return 5000 + (chan*5); 845 } 846} 847 848/* 849 * Locate a channel given a frequency+flags. We cache 850 * the previous lookup to optimize switching between two 851 * channels--as happens with dynamic turbo. 852 */ 853struct ieee80211_channel * 854ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags) 855{ 856 struct ieee80211_channel *c; 857 int i; 858 859 flags &= IEEE80211_CHAN_ALLTURBO; 860 c = ic->ic_prevchan; 861 if (c != NULL && c->ic_freq == freq && 862 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 863 return c; 864 /* brute force search */ 865 for (i = 0; i < ic->ic_nchans; i++) { 866 c = &ic->ic_channels[i]; 867 if (c->ic_freq == freq && 868 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 869 return c; 870 } 871 return NULL; 872} 873 874/* 875 * Locate a channel given a channel number+flags. We cache 876 * the previous lookup to optimize switching between two 877 * channels--as happens with dynamic turbo. 878 */ 879struct ieee80211_channel * 880ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags) 881{ 882 struct ieee80211_channel *c; 883 int i; 884 885 flags &= IEEE80211_CHAN_ALLTURBO; 886 c = ic->ic_prevchan; 887 if (c != NULL && c->ic_ieee == ieee && 888 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 889 return c; 890 /* brute force search */ 891 for (i = 0; i < ic->ic_nchans; i++) { 892 c = &ic->ic_channels[i]; 893 if (c->ic_ieee == ieee && 894 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 895 return c; 896 } 897 return NULL; 898} 899 900static void 901addmedia(struct ifmedia *media, int caps, int addsta, int mode, int mword) 902{ 903#define ADD(_ic, _s, _o) \ 904 ifmedia_add(media, \ 905 IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL) 906 static const u_int mopts[IEEE80211_MODE_MAX] = { 907 [IEEE80211_MODE_AUTO] = IFM_AUTO, 908 [IEEE80211_MODE_11A] = IFM_IEEE80211_11A, 909 [IEEE80211_MODE_11B] = IFM_IEEE80211_11B, 910 [IEEE80211_MODE_11G] = IFM_IEEE80211_11G, 911 [IEEE80211_MODE_FH] = IFM_IEEE80211_FH, 912 [IEEE80211_MODE_TURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO, 913 [IEEE80211_MODE_TURBO_G] = IFM_IEEE80211_11G|IFM_IEEE80211_TURBO, 914 [IEEE80211_MODE_STURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO, 915 [IEEE80211_MODE_HALF] = IFM_IEEE80211_11A, /* XXX */ 916 [IEEE80211_MODE_QUARTER] = IFM_IEEE80211_11A, /* XXX */ 917 [IEEE80211_MODE_11NA] = IFM_IEEE80211_11NA, 918 [IEEE80211_MODE_11NG] = IFM_IEEE80211_11NG, 919 }; 920 u_int mopt; 921 922 mopt = mopts[mode]; 923 if (addsta) 924 ADD(ic, mword, mopt); /* STA mode has no cap */ 925 if (caps & IEEE80211_C_IBSS) 926 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC); 927 if (caps & IEEE80211_C_HOSTAP) 928 ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP); 929 if (caps & IEEE80211_C_AHDEMO) 930 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0); 931 if (caps & IEEE80211_C_MONITOR) 932 ADD(media, mword, mopt | IFM_IEEE80211_MONITOR); 933 if (caps & IEEE80211_C_WDS) 934 ADD(media, mword, mopt | IFM_IEEE80211_WDS); 935#undef ADD 936} 937 938/* 939 * Setup the media data structures according to the channel and 940 * rate tables. 941 */ 942static int 943ieee80211_media_setup(struct ieee80211com *ic, 944 struct ifmedia *media, int caps, int addsta, 945 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) 946{ 947 int i, j, mode, rate, maxrate, mword, r; 948 const struct ieee80211_rateset *rs; 949 struct ieee80211_rateset allrates; 950 951 /* 952 * Fill in media characteristics. 953 */ 954 ifmedia_init(media, 0, media_change, media_stat); 955 maxrate = 0; 956 /* 957 * Add media for legacy operating modes. 958 */ 959 memset(&allrates, 0, sizeof(allrates)); 960 for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) { 961 if (isclr(ic->ic_modecaps, mode)) 962 continue; 963 addmedia(media, caps, addsta, mode, IFM_AUTO); 964 if (mode == IEEE80211_MODE_AUTO) 965 continue; 966 rs = &ic->ic_sup_rates[mode]; 967 for (i = 0; i < rs->rs_nrates; i++) { 968 rate = rs->rs_rates[i]; 969 mword = ieee80211_rate2media(ic, rate, mode); 970 if (mword == 0) 971 continue; 972 addmedia(media, caps, addsta, mode, mword); 973 /* 974 * Add legacy rate to the collection of all rates. 975 */ 976 r = rate & IEEE80211_RATE_VAL; 977 for (j = 0; j < allrates.rs_nrates; j++) 978 if (allrates.rs_rates[j] == r) 979 break; 980 if (j == allrates.rs_nrates) { 981 /* unique, add to the set */ 982 allrates.rs_rates[j] = r; 983 allrates.rs_nrates++; 984 } 985 rate = (rate & IEEE80211_RATE_VAL) / 2; 986 if (rate > maxrate) 987 maxrate = rate; 988 } 989 } 990 for (i = 0; i < allrates.rs_nrates; i++) { 991 mword = ieee80211_rate2media(ic, allrates.rs_rates[i], 992 IEEE80211_MODE_AUTO); 993 if (mword == 0) 994 continue; 995 /* NB: remove media options from mword */ 996 addmedia(media, caps, addsta, 997 IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword)); 998 } 999 /* 1000 * Add HT/11n media. Note that we do not have enough 1001 * bits in the media subtype to express the MCS so we 1002 * use a "placeholder" media subtype and any fixed MCS 1003 * must be specified with a different mechanism. 1004 */ 1005 for (; mode <= IEEE80211_MODE_11NG; mode++) { 1006 if (isclr(ic->ic_modecaps, mode)) 1007 continue; 1008 addmedia(media, caps, addsta, mode, IFM_AUTO); 1009 addmedia(media, caps, addsta, mode, IFM_IEEE80211_MCS); 1010 } 1011 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) || 1012 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) { 1013 addmedia(media, caps, addsta, 1014 IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS); 1015 /* XXX could walk htrates */ 1016 /* XXX known array size */ 1017 if (ieee80211_htrates[15].ht40_rate_400ns > maxrate) 1018 maxrate = ieee80211_htrates[15].ht40_rate_400ns; 1019 } 1020 return maxrate; 1021} 1022 1023void 1024ieee80211_media_init(struct ieee80211com *ic) 1025{ 1026 struct ifnet *ifp = ic->ic_ifp; 1027 int maxrate; 1028 1029 /* NB: this works because the structure is initialized to zero */ 1030 if (!LIST_EMPTY(&ic->ic_media.ifm_list)) { 1031 /* 1032 * We are re-initializing the channel list; clear 1033 * the existing media state as the media routines 1034 * don't suppress duplicates. 1035 */ 1036 ifmedia_removeall(&ic->ic_media); 1037 } 1038 ieee80211_chan_init(ic); 1039 1040 /* 1041 * Recalculate media settings in case new channel list changes 1042 * the set of available modes. 1043 */ 1044 maxrate = ieee80211_media_setup(ic, &ic->ic_media, ic->ic_caps, 1, 1045 ieee80211com_media_change, ieee80211com_media_status); 1046 /* NB: strip explicit mode; we're actually in autoselect */ 1047 ifmedia_set(&ic->ic_media, 1048 media_status(ic->ic_opmode, ic->ic_curchan) &~ 1049 (IFM_MMASK | IFM_IEEE80211_TURBO)); 1050 if (maxrate) 1051 ifp->if_baudrate = IF_Mbps(maxrate); 1052 1053 /* XXX need to propagate new media settings to vap's */ 1054} 1055 1056/* XXX inline or eliminate? */ 1057const struct ieee80211_rateset * 1058ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c) 1059{ 1060 /* XXX does this work for 11ng basic rates? */ 1061 return &ic->ic_sup_rates[ieee80211_chan2mode(c)]; 1062} 1063 1064void 1065ieee80211_announce(struct ieee80211com *ic) 1066{ 1067 struct ifnet *ifp = ic->ic_ifp; 1068 int i, mode, rate, mword; 1069 const struct ieee80211_rateset *rs; 1070 1071 /* NB: skip AUTO since it has no rates */ 1072 for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) { 1073 if (isclr(ic->ic_modecaps, mode)) 1074 continue; 1075 if_printf(ifp, "%s rates: ", ieee80211_phymode_name[mode]); 1076 rs = &ic->ic_sup_rates[mode]; 1077 for (i = 0; i < rs->rs_nrates; i++) { 1078 mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode); 1079 if (mword == 0) 1080 continue; 1081 rate = ieee80211_media2rate(mword); 1082 printf("%s%d%sMbps", (i != 0 ? " " : ""), 1083 rate / 2, ((rate & 0x1) != 0 ? ".5" : "")); 1084 } 1085 printf("\n"); 1086 } 1087 ieee80211_ht_announce(ic); 1088} 1089 1090void 1091ieee80211_announce_channels(struct ieee80211com *ic) 1092{ 1093 const struct ieee80211_channel *c; 1094 char type; 1095 int i, cw; 1096 1097 printf("Chan Freq CW RegPwr MinPwr MaxPwr\n"); 1098 for (i = 0; i < ic->ic_nchans; i++) { 1099 c = &ic->ic_channels[i]; 1100 if (IEEE80211_IS_CHAN_ST(c)) 1101 type = 'S'; 1102 else if (IEEE80211_IS_CHAN_108A(c)) 1103 type = 'T'; 1104 else if (IEEE80211_IS_CHAN_108G(c)) 1105 type = 'G'; 1106 else if (IEEE80211_IS_CHAN_HT(c)) 1107 type = 'n'; 1108 else if (IEEE80211_IS_CHAN_A(c)) 1109 type = 'a'; 1110 else if (IEEE80211_IS_CHAN_ANYG(c)) 1111 type = 'g'; 1112 else if (IEEE80211_IS_CHAN_B(c)) 1113 type = 'b'; 1114 else 1115 type = 'f'; 1116 if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c)) 1117 cw = 40; 1118 else if (IEEE80211_IS_CHAN_HALF(c)) 1119 cw = 10; 1120 else if (IEEE80211_IS_CHAN_QUARTER(c)) 1121 cw = 5; 1122 else 1123 cw = 20; 1124 printf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n" 1125 , c->ic_ieee, c->ic_freq, type 1126 , cw 1127 , IEEE80211_IS_CHAN_HT40U(c) ? '+' : 1128 IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' ' 1129 , c->ic_maxregpower 1130 , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0 1131 , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0 1132 ); 1133 } 1134} 1135 1136static int 1137media2mode(const struct ifmedia_entry *ime, uint32_t flags, uint16_t *mode) 1138{ 1139 switch (IFM_MODE(ime->ifm_media)) { 1140 case IFM_IEEE80211_11A: 1141 *mode = IEEE80211_MODE_11A; 1142 break; 1143 case IFM_IEEE80211_11B: 1144 *mode = IEEE80211_MODE_11B; 1145 break; 1146 case IFM_IEEE80211_11G: 1147 *mode = IEEE80211_MODE_11G; 1148 break; 1149 case IFM_IEEE80211_FH: 1150 *mode = IEEE80211_MODE_FH; 1151 break; 1152 case IFM_IEEE80211_11NA: 1153 *mode = IEEE80211_MODE_11NA; 1154 break; 1155 case IFM_IEEE80211_11NG: 1156 *mode = IEEE80211_MODE_11NG; 1157 break; 1158 case IFM_AUTO: 1159 *mode = IEEE80211_MODE_AUTO; 1160 break; 1161 default: 1162 return 0; 1163 } 1164 /* 1165 * Turbo mode is an ``option''. 1166 * XXX does not apply to AUTO 1167 */ 1168 if (ime->ifm_media & IFM_IEEE80211_TURBO) { 1169 if (*mode == IEEE80211_MODE_11A) { 1170 if (flags & IEEE80211_F_TURBOP) 1171 *mode = IEEE80211_MODE_TURBO_A; 1172 else 1173 *mode = IEEE80211_MODE_STURBO_A; 1174 } else if (*mode == IEEE80211_MODE_11G) 1175 *mode = IEEE80211_MODE_TURBO_G; 1176 else 1177 return 0; 1178 } 1179 /* XXX HT40 +/- */ 1180 return 1; 1181} 1182 1183/* 1184 * Handle a media change request on the underlying interface. 1185 */ 1186int 1187ieee80211com_media_change(struct ifnet *ifp) 1188{ 1189 return EINVAL; 1190} 1191 1192/* 1193 * Handle a media change request on the vap interface. 1194 */ 1195int 1196ieee80211_media_change(struct ifnet *ifp) 1197{ 1198 struct ieee80211vap *vap = ifp->if_softc; 1199 struct ifmedia_entry *ime = vap->iv_media.ifm_cur; 1200 uint16_t newmode; 1201 1202 if (!media2mode(ime, vap->iv_flags, &newmode)) 1203 return EINVAL; 1204 if (vap->iv_des_mode != newmode) { 1205 vap->iv_des_mode = newmode; 1206 return ENETRESET; 1207 } 1208 return 0; 1209} 1210 1211/* 1212 * Common code to calculate the media status word 1213 * from the operating mode and channel state. 1214 */ 1215static int 1216media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan) 1217{ 1218 int status; 1219 1220 status = IFM_IEEE80211; 1221 switch (opmode) { 1222 case IEEE80211_M_STA: 1223 break; 1224 case IEEE80211_M_IBSS: 1225 status |= IFM_IEEE80211_ADHOC; 1226 break; 1227 case IEEE80211_M_HOSTAP: 1228 status |= IFM_IEEE80211_HOSTAP; 1229 break; 1230 case IEEE80211_M_MONITOR: 1231 status |= IFM_IEEE80211_MONITOR; 1232 break; 1233 case IEEE80211_M_AHDEMO: 1234 status |= IFM_IEEE80211_ADHOC | IFM_FLAG0; 1235 break; 1236 case IEEE80211_M_WDS: 1237 status |= IFM_IEEE80211_WDS; 1238 break; 1239 } 1240 if (IEEE80211_IS_CHAN_HTA(chan)) { 1241 status |= IFM_IEEE80211_11NA; 1242 } else if (IEEE80211_IS_CHAN_HTG(chan)) { 1243 status |= IFM_IEEE80211_11NG; 1244 } else if (IEEE80211_IS_CHAN_A(chan)) { 1245 status |= IFM_IEEE80211_11A; 1246 } else if (IEEE80211_IS_CHAN_B(chan)) { 1247 status |= IFM_IEEE80211_11B; 1248 } else if (IEEE80211_IS_CHAN_ANYG(chan)) { 1249 status |= IFM_IEEE80211_11G; 1250 } else if (IEEE80211_IS_CHAN_FHSS(chan)) { 1251 status |= IFM_IEEE80211_FH; 1252 } 1253 /* XXX else complain? */ 1254 1255 if (IEEE80211_IS_CHAN_TURBO(chan)) 1256 status |= IFM_IEEE80211_TURBO; 1257#if 0 1258 if (IEEE80211_IS_CHAN_HT20(chan)) 1259 status |= IFM_IEEE80211_HT20; 1260 if (IEEE80211_IS_CHAN_HT40(chan)) 1261 status |= IFM_IEEE80211_HT40; 1262#endif 1263 return status; 1264} 1265 1266static void 1267ieee80211com_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1268{ 1269 struct ieee80211com *ic = ifp->if_l2com; 1270 struct ieee80211vap *vap; 1271 1272 imr->ifm_status = IFM_AVALID; 1273 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1274 if (vap->iv_ifp->if_flags & IFF_UP) { 1275 imr->ifm_status |= IFM_ACTIVE; 1276 break; 1277 } 1278 imr->ifm_active = media_status(ic->ic_opmode, ic->ic_curchan); 1279 if (imr->ifm_status & IFM_ACTIVE) 1280 imr->ifm_current = imr->ifm_active; 1281} 1282 1283void 1284ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1285{ 1286 struct ieee80211vap *vap = ifp->if_softc; 1287 struct ieee80211com *ic = vap->iv_ic; 1288 enum ieee80211_phymode mode; 1289 1290 imr->ifm_status = IFM_AVALID; 1291 /* 1292 * NB: use the current channel's mode to lock down a xmit 1293 * rate only when running; otherwise we may have a mismatch 1294 * in which case the rate will not be convertible. 1295 */ 1296 if (vap->iv_state == IEEE80211_S_RUN) { 1297 imr->ifm_status |= IFM_ACTIVE; 1298 mode = ieee80211_chan2mode(ic->ic_curchan); 1299 } else 1300 mode = IEEE80211_MODE_AUTO; 1301 imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan); 1302 /* 1303 * Calculate a current rate if possible. 1304 */ 1305 if (vap->iv_txparms[mode].ucastrate != IEEE80211_FIXED_RATE_NONE) { 1306 /* 1307 * A fixed rate is set, report that. 1308 */ 1309 imr->ifm_active |= ieee80211_rate2media(ic, 1310 vap->iv_txparms[mode].ucastrate, mode); 1311 } else if (vap->iv_opmode == IEEE80211_M_STA) { 1312 /* 1313 * In station mode report the current transmit rate. 1314 */ 1315 imr->ifm_active |= ieee80211_rate2media(ic, 1316 vap->iv_bss->ni_txrate, mode); 1317 } else 1318 imr->ifm_active |= IFM_AUTO; 1319 if (imr->ifm_status & IFM_ACTIVE) 1320 imr->ifm_current = imr->ifm_active; 1321} 1322 1323/* 1324 * Set the current phy mode and recalculate the active channel 1325 * set based on the available channels for this mode. Also 1326 * select a new default/current channel if the current one is 1327 * inappropriate for this mode. 1328 */ 1329int 1330ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode) 1331{ 1332 /* 1333 * Adjust basic rates in 11b/11g supported rate set. 1334 * Note that if operating on a hal/quarter rate channel 1335 * this is a noop as those rates sets are different 1336 * and used instead. 1337 */ 1338 if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B) 1339 ieee80211_setbasicrates(&ic->ic_sup_rates[mode], mode); 1340 1341 ic->ic_curmode = mode; 1342 ieee80211_reset_erp(ic); /* reset ERP state */ 1343 1344 return 0; 1345} 1346 1347/* 1348 * Return the phy mode for with the specified channel. 1349 */ 1350enum ieee80211_phymode 1351ieee80211_chan2mode(const struct ieee80211_channel *chan) 1352{ 1353 1354 if (IEEE80211_IS_CHAN_HTA(chan)) 1355 return IEEE80211_MODE_11NA; 1356 else if (IEEE80211_IS_CHAN_HTG(chan)) 1357 return IEEE80211_MODE_11NG; 1358 else if (IEEE80211_IS_CHAN_108G(chan)) 1359 return IEEE80211_MODE_TURBO_G; 1360 else if (IEEE80211_IS_CHAN_ST(chan)) 1361 return IEEE80211_MODE_STURBO_A; 1362 else if (IEEE80211_IS_CHAN_TURBO(chan)) 1363 return IEEE80211_MODE_TURBO_A; 1364 else if (IEEE80211_IS_CHAN_HALF(chan)) 1365 return IEEE80211_MODE_HALF; 1366 else if (IEEE80211_IS_CHAN_QUARTER(chan)) 1367 return IEEE80211_MODE_QUARTER; 1368 else if (IEEE80211_IS_CHAN_A(chan)) 1369 return IEEE80211_MODE_11A; 1370 else if (IEEE80211_IS_CHAN_ANYG(chan)) 1371 return IEEE80211_MODE_11G; 1372 else if (IEEE80211_IS_CHAN_B(chan)) 1373 return IEEE80211_MODE_11B; 1374 else if (IEEE80211_IS_CHAN_FHSS(chan)) 1375 return IEEE80211_MODE_FH; 1376 1377 /* NB: should not get here */ 1378 printf("%s: cannot map channel to mode; freq %u flags 0x%x\n", 1379 __func__, chan->ic_freq, chan->ic_flags); 1380 return IEEE80211_MODE_11B; 1381} 1382 1383struct ratemedia { 1384 u_int match; /* rate + mode */ 1385 u_int media; /* if_media rate */ 1386}; 1387 1388static int 1389findmedia(const struct ratemedia rates[], int n, u_int match) 1390{ 1391 int i; 1392 1393 for (i = 0; i < n; i++) 1394 if (rates[i].match == match) 1395 return rates[i].media; 1396 return IFM_AUTO; 1397} 1398 1399/* 1400 * Convert IEEE80211 rate value to ifmedia subtype. 1401 * Rate is either a legacy rate in units of 0.5Mbps 1402 * or an MCS index. 1403 */ 1404int 1405ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode) 1406{ 1407#define N(a) (sizeof(a) / sizeof(a[0])) 1408 static const struct ratemedia rates[] = { 1409 { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 }, 1410 { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 }, 1411 { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 }, 1412 { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 }, 1413 { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 }, 1414 { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 }, 1415 { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 }, 1416 { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 }, 1417 { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 }, 1418 { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 }, 1419 { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 }, 1420 { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 }, 1421 { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 }, 1422 { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 }, 1423 { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 }, 1424 { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 }, 1425 { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 }, 1426 { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 }, 1427 { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 }, 1428 { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 }, 1429 { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 }, 1430 { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 }, 1431 { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 }, 1432 { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 }, 1433 { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 }, 1434 { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 }, 1435 { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 }, 1436 { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 }, 1437 { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 }, 1438 { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 }, 1439 /* NB: OFDM72 doesn't realy exist so we don't handle it */ 1440 }; 1441 static const struct ratemedia htrates[] = { 1442 { 0, IFM_IEEE80211_MCS }, 1443 { 1, IFM_IEEE80211_MCS }, 1444 { 2, IFM_IEEE80211_MCS }, 1445 { 3, IFM_IEEE80211_MCS }, 1446 { 4, IFM_IEEE80211_MCS }, 1447 { 5, IFM_IEEE80211_MCS }, 1448 { 6, IFM_IEEE80211_MCS }, 1449 { 7, IFM_IEEE80211_MCS }, 1450 { 8, IFM_IEEE80211_MCS }, 1451 { 9, IFM_IEEE80211_MCS }, 1452 { 10, IFM_IEEE80211_MCS }, 1453 { 11, IFM_IEEE80211_MCS }, 1454 { 12, IFM_IEEE80211_MCS }, 1455 { 13, IFM_IEEE80211_MCS }, 1456 { 14, IFM_IEEE80211_MCS }, 1457 { 15, IFM_IEEE80211_MCS }, 1458 }; 1459 int m; 1460 1461 /* 1462 * Check 11n rates first for match as an MCS. 1463 */ 1464 if (mode == IEEE80211_MODE_11NA) { 1465 if (rate & IEEE80211_RATE_MCS) { 1466 rate &= ~IEEE80211_RATE_MCS; 1467 m = findmedia(htrates, N(htrates), rate); 1468 if (m != IFM_AUTO) 1469 return m | IFM_IEEE80211_11NA; 1470 } 1471 } else if (mode == IEEE80211_MODE_11NG) { 1472 /* NB: 12 is ambiguous, it will be treated as an MCS */ 1473 if (rate & IEEE80211_RATE_MCS) { 1474 rate &= ~IEEE80211_RATE_MCS; 1475 m = findmedia(htrates, N(htrates), rate); 1476 if (m != IFM_AUTO) 1477 return m | IFM_IEEE80211_11NG; 1478 } 1479 } 1480 rate &= IEEE80211_RATE_VAL; 1481 switch (mode) { 1482 case IEEE80211_MODE_11A: 1483 case IEEE80211_MODE_HALF: /* XXX good 'nuf */ 1484 case IEEE80211_MODE_QUARTER: 1485 case IEEE80211_MODE_11NA: 1486 case IEEE80211_MODE_TURBO_A: 1487 case IEEE80211_MODE_STURBO_A: 1488 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11A); 1489 case IEEE80211_MODE_11B: 1490 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11B); 1491 case IEEE80211_MODE_FH: 1492 return findmedia(rates, N(rates), rate | IFM_IEEE80211_FH); 1493 case IEEE80211_MODE_AUTO: 1494 /* NB: ic may be NULL for some drivers */ 1495 if (ic != NULL && ic->ic_phytype == IEEE80211_T_FH) 1496 return findmedia(rates, N(rates), 1497 rate | IFM_IEEE80211_FH); 1498 /* NB: hack, 11g matches both 11b+11a rates */ 1499 /* fall thru... */ 1500 case IEEE80211_MODE_11G: 1501 case IEEE80211_MODE_11NG: 1502 case IEEE80211_MODE_TURBO_G: 1503 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11G); 1504 } 1505 return IFM_AUTO; 1506#undef N 1507} 1508 1509int 1510ieee80211_media2rate(int mword) 1511{ 1512#define N(a) (sizeof(a) / sizeof(a[0])) 1513 static const int ieeerates[] = { 1514 -1, /* IFM_AUTO */ 1515 0, /* IFM_MANUAL */ 1516 0, /* IFM_NONE */ 1517 2, /* IFM_IEEE80211_FH1 */ 1518 4, /* IFM_IEEE80211_FH2 */ 1519 2, /* IFM_IEEE80211_DS1 */ 1520 4, /* IFM_IEEE80211_DS2 */ 1521 11, /* IFM_IEEE80211_DS5 */ 1522 22, /* IFM_IEEE80211_DS11 */ 1523 44, /* IFM_IEEE80211_DS22 */ 1524 12, /* IFM_IEEE80211_OFDM6 */ 1525 18, /* IFM_IEEE80211_OFDM9 */ 1526 24, /* IFM_IEEE80211_OFDM12 */ 1527 36, /* IFM_IEEE80211_OFDM18 */ 1528 48, /* IFM_IEEE80211_OFDM24 */ 1529 72, /* IFM_IEEE80211_OFDM36 */ 1530 96, /* IFM_IEEE80211_OFDM48 */ 1531 108, /* IFM_IEEE80211_OFDM54 */ 1532 144, /* IFM_IEEE80211_OFDM72 */ 1533 0, /* IFM_IEEE80211_DS354k */ 1534 0, /* IFM_IEEE80211_DS512k */ 1535 6, /* IFM_IEEE80211_OFDM3 */ 1536 9, /* IFM_IEEE80211_OFDM4 */ 1537 54, /* IFM_IEEE80211_OFDM27 */ 1538 -1, /* IFM_IEEE80211_MCS */ 1539 }; 1540 return IFM_SUBTYPE(mword) < N(ieeerates) ? 1541 ieeerates[IFM_SUBTYPE(mword)] : 0; 1542#undef N 1543} 1544