ieee80211.c revision 188775
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 188775 2009-02-19 04:34:22Z 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 /* 130 * Help drivers that work only with frequencies by filling 131 * in IEEE channel #'s if not already calculated. Note this 132 * mimics similar work done in ieee80211_setregdomain when 133 * changing regulatory state. 134 */ 135 if (c->ic_ieee == 0) 136 c->ic_ieee = ieee80211_mhz2ieee(c->ic_freq,c->ic_flags); 137 if (IEEE80211_IS_CHAN_HT40(c) && c->ic_extieee == 0) 138 c->ic_extieee = ieee80211_mhz2ieee(c->ic_freq + 139 (IEEE80211_IS_CHAN_HT40U(c) ? 20 : -20), 140 c->ic_flags); 141 /* default max tx power to max regulatory */ 142 if (c->ic_maxpower == 0) 143 c->ic_maxpower = 2*c->ic_maxregpower; 144 setbit(ic->ic_chan_avail, c->ic_ieee); 145 /* 146 * Identify mode capabilities. 147 */ 148 if (IEEE80211_IS_CHAN_A(c)) 149 setbit(ic->ic_modecaps, IEEE80211_MODE_11A); 150 if (IEEE80211_IS_CHAN_B(c)) 151 setbit(ic->ic_modecaps, IEEE80211_MODE_11B); 152 if (IEEE80211_IS_CHAN_ANYG(c)) 153 setbit(ic->ic_modecaps, IEEE80211_MODE_11G); 154 if (IEEE80211_IS_CHAN_FHSS(c)) 155 setbit(ic->ic_modecaps, IEEE80211_MODE_FH); 156 if (IEEE80211_IS_CHAN_108A(c)) 157 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_A); 158 if (IEEE80211_IS_CHAN_108G(c)) 159 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_G); 160 if (IEEE80211_IS_CHAN_ST(c)) 161 setbit(ic->ic_modecaps, IEEE80211_MODE_STURBO_A); 162 if (IEEE80211_IS_CHAN_HTA(c)) 163 setbit(ic->ic_modecaps, IEEE80211_MODE_11NA); 164 if (IEEE80211_IS_CHAN_HTG(c)) 165 setbit(ic->ic_modecaps, IEEE80211_MODE_11NG); 166 } 167 /* initialize candidate channels to all available */ 168 memcpy(ic->ic_chan_active, ic->ic_chan_avail, 169 sizeof(ic->ic_chan_avail)); 170 171 /* sort channel table to allow lookup optimizations */ 172 ieee80211_sort_channels(ic->ic_channels, ic->ic_nchans); 173 174 /* invalidate any previous state */ 175 ic->ic_bsschan = IEEE80211_CHAN_ANYC; 176 ic->ic_prevchan = NULL; 177 ic->ic_csa_newchan = NULL; 178 /* arbitrarily pick the first channel */ 179 ic->ic_curchan = &ic->ic_channels[0]; 180 181 /* fillin well-known rate sets if driver has not specified */ 182 DEFAULTRATES(IEEE80211_MODE_11B, ieee80211_rateset_11b); 183 DEFAULTRATES(IEEE80211_MODE_11G, ieee80211_rateset_11g); 184 DEFAULTRATES(IEEE80211_MODE_11A, ieee80211_rateset_11a); 185 DEFAULTRATES(IEEE80211_MODE_TURBO_A, ieee80211_rateset_11a); 186 DEFAULTRATES(IEEE80211_MODE_TURBO_G, ieee80211_rateset_11g); 187 DEFAULTRATES(IEEE80211_MODE_STURBO_A, ieee80211_rateset_11a); 188 DEFAULTRATES(IEEE80211_MODE_11NA, ieee80211_rateset_11a); 189 DEFAULTRATES(IEEE80211_MODE_11NG, ieee80211_rateset_11g); 190 191 /* 192 * Set auto mode to reset active channel state and any desired channel. 193 */ 194 (void) ieee80211_setmode(ic, IEEE80211_MODE_AUTO); 195#undef DEFAULTRATES 196} 197 198static void 199null_update_mcast(struct ifnet *ifp) 200{ 201 if_printf(ifp, "need multicast update callback\n"); 202} 203 204static void 205null_update_promisc(struct ifnet *ifp) 206{ 207 if_printf(ifp, "need promiscuous mode update callback\n"); 208} 209 210static int 211null_output(struct ifnet *ifp, struct mbuf *m, 212 struct sockaddr *dst, struct rtentry *rt0) 213{ 214 if_printf(ifp, "discard raw packet\n"); 215 m_freem(m); 216 return EIO; 217} 218 219static void 220null_input(struct ifnet *ifp, struct mbuf *m) 221{ 222 if_printf(ifp, "if_input should not be called\n"); 223 m_freem(m); 224} 225 226/* 227 * Attach/setup the common net80211 state. Called by 228 * the driver on attach to prior to creating any vap's. 229 */ 230void 231ieee80211_ifattach(struct ieee80211com *ic) 232{ 233 struct ifnet *ifp = ic->ic_ifp; 234 struct sockaddr_dl *sdl; 235 struct ifaddr *ifa; 236 237 KASSERT(ifp->if_type == IFT_IEEE80211, ("if_type %d", ifp->if_type)); 238 239 IEEE80211_LOCK_INIT(ic, ifp->if_xname); 240 TAILQ_INIT(&ic->ic_vaps); 241 /* 242 * Fill in 802.11 available channel set, mark all 243 * available channels as active, and pick a default 244 * channel if not already specified. 245 */ 246 ieee80211_media_init(ic); 247 248 ic->ic_update_mcast = null_update_mcast; 249 ic->ic_update_promisc = null_update_promisc; 250 251 ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT; 252 ic->ic_lintval = ic->ic_bintval; 253 ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX; 254 255 ieee80211_crypto_attach(ic); 256 ieee80211_node_attach(ic); 257 ieee80211_power_attach(ic); 258 ieee80211_proto_attach(ic); 259 ieee80211_ht_attach(ic); 260 ieee80211_scan_attach(ic); 261 ieee80211_regdomain_attach(ic); 262 263 ieee80211_sysctl_attach(ic); 264 265 ifp->if_addrlen = IEEE80211_ADDR_LEN; 266 ifp->if_hdrlen = 0; 267 if_attach(ifp); 268 ifp->if_mtu = IEEE80211_MTU_MAX; 269 ifp->if_broadcastaddr = ieee80211broadcastaddr; 270 ifp->if_output = null_output; 271 ifp->if_input = null_input; /* just in case */ 272 ifp->if_resolvemulti = NULL; /* NB: callers check */ 273 274 ifa = ifaddr_byindex(ifp->if_index); 275 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); 276 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 277 sdl->sdl_type = IFT_ETHER; /* XXX IFT_IEEE80211? */ 278 sdl->sdl_alen = IEEE80211_ADDR_LEN; 279 IEEE80211_ADDR_COPY(LLADDR(sdl), ic->ic_myaddr); 280} 281 282/* 283 * Detach net80211 state on device detach. Tear down 284 * all vap's and reclaim all common state prior to the 285 * device state going away. Note we may call back into 286 * driver; it must be prepared for this. 287 */ 288void 289ieee80211_ifdetach(struct ieee80211com *ic) 290{ 291 struct ifnet *ifp = ic->ic_ifp; 292 struct ieee80211vap *vap; 293 294 while ((vap = TAILQ_FIRST(&ic->ic_vaps)) != NULL) 295 ieee80211_vap_destroy(vap); 296 ieee80211_waitfor_parent(ic); 297 298 ieee80211_sysctl_detach(ic); 299 ieee80211_regdomain_detach(ic); 300 ieee80211_scan_detach(ic); 301 ieee80211_ht_detach(ic); 302 /* NB: must be called before ieee80211_node_detach */ 303 ieee80211_proto_detach(ic); 304 ieee80211_crypto_detach(ic); 305 ieee80211_power_detach(ic); 306 ieee80211_node_detach(ic); 307 ifmedia_removeall(&ic->ic_media); 308 309 IEEE80211_LOCK_DESTROY(ic); 310 if_detach(ifp); 311} 312 313/* 314 * Default reset method for use with the ioctl support. This 315 * method is invoked after any state change in the 802.11 316 * layer that should be propagated to the hardware but not 317 * require re-initialization of the 802.11 state machine (e.g 318 * rescanning for an ap). We always return ENETRESET which 319 * should cause the driver to re-initialize the device. Drivers 320 * can override this method to implement more optimized support. 321 */ 322static int 323default_reset(struct ieee80211vap *vap, u_long cmd) 324{ 325 return ENETRESET; 326} 327 328/* 329 * Prepare a vap for use. Drivers use this call to 330 * setup net80211 state in new vap's prior attaching 331 * them with ieee80211_vap_attach (below). 332 */ 333int 334ieee80211_vap_setup(struct ieee80211com *ic, struct ieee80211vap *vap, 335 const char name[IFNAMSIZ], int unit, int opmode, int flags, 336 const uint8_t bssid[IEEE80211_ADDR_LEN], 337 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 338{ 339 struct ifnet *ifp; 340 341 ifp = if_alloc(IFT_ETHER); 342 if (ifp == NULL) { 343 if_printf(ic->ic_ifp, "%s: unable to allocate ifnet\n", 344 __func__); 345 return ENOMEM; 346 } 347 if_initname(ifp, name, unit); 348 ifp->if_softc = vap; /* back pointer */ 349 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 350 ifp->if_start = ieee80211_start; 351 ifp->if_ioctl = ieee80211_ioctl; 352 ifp->if_watchdog = NULL; /* NB: no watchdog routine */ 353 ifp->if_init = ieee80211_init; 354 /* NB: input+output filled in by ether_ifattach */ 355 IFQ_SET_MAXLEN(&ifp->if_snd, IFQ_MAXLEN); 356 ifp->if_snd.ifq_drv_maxlen = IFQ_MAXLEN; 357 IFQ_SET_READY(&ifp->if_snd); 358 359 vap->iv_ifp = ifp; 360 vap->iv_ic = ic; 361 vap->iv_flags = ic->ic_flags; /* propagate common flags */ 362 vap->iv_flags_ext = ic->ic_flags_ext; 363 vap->iv_flags_ven = ic->ic_flags_ven; 364 vap->iv_caps = ic->ic_caps &~ IEEE80211_C_OPMODE; 365 vap->iv_htcaps = ic->ic_htcaps; 366 vap->iv_opmode = opmode; 367 vap->iv_caps |= ieee80211_opcap[opmode]; 368 switch (opmode) { 369 case IEEE80211_M_WDS: 370 /* 371 * WDS links must specify the bssid of the far end. 372 * For legacy operation this is a static relationship. 373 * For non-legacy operation the station must associate 374 * and be authorized to pass traffic. Plumbing the 375 * vap to the proper node happens when the vap 376 * transitions to RUN state. 377 */ 378 IEEE80211_ADDR_COPY(vap->iv_des_bssid, bssid); 379 vap->iv_flags |= IEEE80211_F_DESBSSID; 380 if (flags & IEEE80211_CLONE_WDSLEGACY) 381 vap->iv_flags_ext |= IEEE80211_FEXT_WDSLEGACY; 382 break; 383#ifdef IEEE80211_SUPPORT_TDMA 384 case IEEE80211_M_AHDEMO: 385 if (flags & IEEE80211_CLONE_TDMA) { 386 /* NB: checked before clone operation allowed */ 387 KASSERT(ic->ic_caps & IEEE80211_C_TDMA, 388 ("not TDMA capable, ic_caps 0x%x", ic->ic_caps)); 389 /* 390 * Propagate TDMA capability to mark vap; this 391 * cannot be removed and is used to distinguish 392 * regular ahdemo operation from ahdemo+tdma. 393 */ 394 vap->iv_caps |= IEEE80211_C_TDMA; 395 } 396 break; 397#endif 398 } 399 /* auto-enable s/w beacon miss support */ 400 if (flags & IEEE80211_CLONE_NOBEACONS) 401 vap->iv_flags_ext |= IEEE80211_FEXT_SWBMISS; 402 /* 403 * Enable various functionality by default if we're 404 * capable; the driver can override us if it knows better. 405 */ 406 if (vap->iv_caps & IEEE80211_C_WME) 407 vap->iv_flags |= IEEE80211_F_WME; 408 if (vap->iv_caps & IEEE80211_C_BURST) 409 vap->iv_flags |= IEEE80211_F_BURST; 410 if (vap->iv_caps & IEEE80211_C_FF) 411 vap->iv_flags |= IEEE80211_F_FF; 412 if (vap->iv_caps & IEEE80211_C_TURBOP) 413 vap->iv_flags |= IEEE80211_F_TURBOP; 414 /* NB: bg scanning only makes sense for station mode right now */ 415 if (vap->iv_opmode == IEEE80211_M_STA && 416 (vap->iv_caps & IEEE80211_C_BGSCAN)) 417 vap->iv_flags |= IEEE80211_F_BGSCAN; 418 vap->iv_flags |= IEEE80211_F_DOTH; /* XXX no cap, just ena */ 419 /* NB: DFS support only makes sense for ap mode right now */ 420 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 421 (vap->iv_caps & IEEE80211_C_DFS)) 422 vap->iv_flags_ext |= IEEE80211_FEXT_DFS; 423 424 vap->iv_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */ 425 vap->iv_bmissthreshold = IEEE80211_HWBMISS_DEFAULT; 426 vap->iv_dtim_period = IEEE80211_DTIM_DEFAULT; 427 /* 428 * Install a default reset method for the ioctl support; 429 * the driver can override this. 430 */ 431 vap->iv_reset = default_reset; 432 433 IEEE80211_ADDR_COPY(vap->iv_myaddr, macaddr); 434 435 ieee80211_sysctl_vattach(vap); 436 ieee80211_crypto_vattach(vap); 437 ieee80211_node_vattach(vap); 438 ieee80211_power_vattach(vap); 439 ieee80211_proto_vattach(vap); 440 ieee80211_ht_vattach(vap); 441 ieee80211_scan_vattach(vap); 442 ieee80211_regdomain_vattach(vap); 443 444 return 0; 445} 446 447/* 448 * Activate a vap. State should have been prepared with a 449 * call to ieee80211_vap_setup and by the driver. On return 450 * from this call the vap is ready for use. 451 */ 452int 453ieee80211_vap_attach(struct ieee80211vap *vap, 454 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) 455{ 456 struct ifnet *ifp = vap->iv_ifp; 457 struct ieee80211com *ic = vap->iv_ic; 458 struct ifmediareq imr; 459 int maxrate; 460 461 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 462 "%s: %s parent %s flags 0x%x flags_ext 0x%x\n", 463 __func__, ieee80211_opmode_name[vap->iv_opmode], 464 ic->ic_ifp->if_xname, vap->iv_flags, vap->iv_flags_ext); 465 466 /* 467 * Do late attach work that cannot happen until after 468 * the driver has had a chance to override defaults. 469 */ 470 ieee80211_node_latevattach(vap); 471 ieee80211_power_latevattach(vap); 472 473 maxrate = ieee80211_media_setup(ic, &vap->iv_media, vap->iv_caps, 474 vap->iv_opmode == IEEE80211_M_STA, media_change, media_stat); 475 ieee80211_media_status(ifp, &imr); 476 /* NB: strip explicit mode; we're actually in autoselect */ 477 ifmedia_set(&vap->iv_media, 478 imr.ifm_active &~ (IFM_MMASK | IFM_IEEE80211_TURBO)); 479 if (maxrate) 480 ifp->if_baudrate = IF_Mbps(maxrate); 481 482 ether_ifattach(ifp, vap->iv_myaddr); 483 /* hook output method setup by ether_ifattach */ 484 vap->iv_output = ifp->if_output; 485 ifp->if_output = ieee80211_output; 486 /* NB: if_mtu set by ether_ifattach to ETHERMTU */ 487 bpfattach2(ifp, DLT_IEEE802_11, ifp->if_hdrlen, &vap->iv_rawbpf); 488 489 IEEE80211_LOCK(ic); 490 TAILQ_INSERT_TAIL(&ic->ic_vaps, vap, iv_next); 491 ieee80211_syncflag_locked(ic, IEEE80211_F_WME); 492 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); 493 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); 494 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); 495 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_HT); 496 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_USEHT40); 497 ieee80211_syncifflag_locked(ic, IFF_PROMISC); 498 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI); 499 IEEE80211_UNLOCK(ic); 500 501 return 1; 502} 503 504/* 505 * Tear down vap state and reclaim the ifnet. 506 * The driver is assumed to have prepared for 507 * this; e.g. by turning off interrupts for the 508 * underlying device. 509 */ 510void 511ieee80211_vap_detach(struct ieee80211vap *vap) 512{ 513 struct ieee80211com *ic = vap->iv_ic; 514 struct ifnet *ifp = vap->iv_ifp; 515 516 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s parent %s\n", 517 __func__, ieee80211_opmode_name[vap->iv_opmode], 518 ic->ic_ifp->if_xname); 519 520 IEEE80211_LOCK(ic); 521 /* block traffic from above */ 522 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 523 /* 524 * Evil hack. Clear the backpointer from the ifnet to the 525 * vap so any requests from above will return an error or 526 * be ignored. In particular this short-circuits requests 527 * by the bridge to turn off promiscuous mode as a result 528 * of calling ether_ifdetach. 529 */ 530 ifp->if_softc = NULL; 531 /* 532 * Stop the vap before detaching the ifnet. Ideally we'd 533 * do this in the other order so the ifnet is inaccessible 534 * while we cleanup internal state but that is hard. 535 */ 536 ieee80211_stop_locked(vap); 537 538 TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next); 539 ieee80211_syncflag_locked(ic, IEEE80211_F_WME); 540 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); 541 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); 542 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); 543 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_HT); 544 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_USEHT40); 545 ieee80211_syncifflag_locked(ic, IFF_PROMISC); 546 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI); 547 IEEE80211_UNLOCK(ic); 548 549 /* XXX can't hold com lock */ 550 /* NB: bpfattach is called by ether_ifdetach and claims all taps */ 551 ether_ifdetach(ifp); 552 553 ifmedia_removeall(&vap->iv_media); 554 555 ieee80211_regdomain_vdetach(vap); 556 ieee80211_scan_vdetach(vap); 557 ieee80211_ht_vdetach(vap); 558 /* NB: must be before ieee80211_node_vdetach */ 559 ieee80211_proto_vdetach(vap); 560 ieee80211_crypto_vdetach(vap); 561 ieee80211_power_vdetach(vap); 562 ieee80211_node_vdetach(vap); 563 ieee80211_sysctl_vdetach(vap); 564 565 if_free(ifp); 566} 567 568/* 569 * Synchronize flag bit state in the parent ifnet structure 570 * according to the state of all vap ifnet's. This is used, 571 * for example, to handle IFF_PROMISC and IFF_ALLMULTI. 572 */ 573void 574ieee80211_syncifflag_locked(struct ieee80211com *ic, int flag) 575{ 576 struct ifnet *ifp = ic->ic_ifp; 577 struct ieee80211vap *vap; 578 int bit, oflags; 579 580 IEEE80211_LOCK_ASSERT(ic); 581 582 bit = 0; 583 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 584 if (vap->iv_ifp->if_flags & flag) { 585 /* 586 * XXX the bridge sets PROMISC but we don't want to 587 * enable it on the device, discard here so all the 588 * drivers don't need to special-case it 589 */ 590 if (flag == IFF_PROMISC && 591 vap->iv_opmode == IEEE80211_M_HOSTAP) 592 continue; 593 bit = 1; 594 break; 595 } 596 oflags = ifp->if_flags; 597 if (bit) 598 ifp->if_flags |= flag; 599 else 600 ifp->if_flags &= ~flag; 601 if ((ifp->if_flags ^ oflags) & flag) { 602 /* XXX should we return 1/0 and let caller do this? */ 603 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 604 if (flag == IFF_PROMISC) 605 ic->ic_update_promisc(ifp); 606 else if (flag == IFF_ALLMULTI) 607 ic->ic_update_mcast(ifp); 608 } 609 } 610} 611 612/* 613 * Synchronize flag bit state in the com structure 614 * according to the state of all vap's. This is used, 615 * for example, to handle state changes via ioctls. 616 */ 617static void 618ieee80211_syncflag_locked(struct ieee80211com *ic, int flag) 619{ 620 struct ieee80211vap *vap; 621 int bit; 622 623 IEEE80211_LOCK_ASSERT(ic); 624 625 bit = 0; 626 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 627 if (vap->iv_flags & flag) { 628 bit = 1; 629 break; 630 } 631 if (bit) 632 ic->ic_flags |= flag; 633 else 634 ic->ic_flags &= ~flag; 635} 636 637void 638ieee80211_syncflag(struct ieee80211vap *vap, int flag) 639{ 640 struct ieee80211com *ic = vap->iv_ic; 641 642 IEEE80211_LOCK(ic); 643 if (flag < 0) { 644 flag = -flag; 645 vap->iv_flags &= ~flag; 646 } else 647 vap->iv_flags |= flag; 648 ieee80211_syncflag_locked(ic, flag); 649 IEEE80211_UNLOCK(ic); 650} 651 652/* 653 * Synchronize flag bit state in the com structure 654 * according to the state of all vap's. This is used, 655 * for example, to handle state changes via ioctls. 656 */ 657static void 658ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag) 659{ 660 struct ieee80211vap *vap; 661 int bit; 662 663 IEEE80211_LOCK_ASSERT(ic); 664 665 bit = 0; 666 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 667 if (vap->iv_flags_ext & flag) { 668 bit = 1; 669 break; 670 } 671 if (bit) 672 ic->ic_flags_ext |= flag; 673 else 674 ic->ic_flags_ext &= ~flag; 675} 676 677void 678ieee80211_syncflag_ext(struct ieee80211vap *vap, int flag) 679{ 680 struct ieee80211com *ic = vap->iv_ic; 681 682 IEEE80211_LOCK(ic); 683 if (flag < 0) { 684 flag = -flag; 685 vap->iv_flags_ext &= ~flag; 686 } else 687 vap->iv_flags_ext |= flag; 688 ieee80211_syncflag_ext_locked(ic, flag); 689 IEEE80211_UNLOCK(ic); 690} 691 692static __inline int 693mapgsm(u_int freq, u_int flags) 694{ 695 freq *= 10; 696 if (flags & IEEE80211_CHAN_QUARTER) 697 freq += 5; 698 else if (flags & IEEE80211_CHAN_HALF) 699 freq += 10; 700 else 701 freq += 20; 702 /* NB: there is no 907/20 wide but leave room */ 703 return (freq - 906*10) / 5; 704} 705 706static __inline int 707mappsb(u_int freq, u_int flags) 708{ 709 return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5; 710} 711 712/* 713 * Convert MHz frequency to IEEE channel number. 714 */ 715int 716ieee80211_mhz2ieee(u_int freq, u_int flags) 717{ 718#define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990) 719 if (flags & IEEE80211_CHAN_GSM) 720 return mapgsm(freq, flags); 721 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 722 if (freq == 2484) 723 return 14; 724 if (freq < 2484) 725 return ((int) freq - 2407) / 5; 726 else 727 return 15 + ((freq - 2512) / 20); 728 } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */ 729 if (freq <= 5000) { 730 /* XXX check regdomain? */ 731 if (IS_FREQ_IN_PSB(freq)) 732 return mappsb(freq, flags); 733 return (freq - 4000) / 5; 734 } else 735 return (freq - 5000) / 5; 736 } else { /* either, guess */ 737 if (freq == 2484) 738 return 14; 739 if (freq < 2484) { 740 if (907 <= freq && freq <= 922) 741 return mapgsm(freq, flags); 742 return ((int) freq - 2407) / 5; 743 } 744 if (freq < 5000) { 745 if (IS_FREQ_IN_PSB(freq)) 746 return mappsb(freq, flags); 747 else if (freq > 4900) 748 return (freq - 4000) / 5; 749 else 750 return 15 + ((freq - 2512) / 20); 751 } 752 return (freq - 5000) / 5; 753 } 754#undef IS_FREQ_IN_PSB 755} 756 757/* 758 * Convert channel to IEEE channel number. 759 */ 760int 761ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c) 762{ 763 if (c == NULL) { 764 if_printf(ic->ic_ifp, "invalid channel (NULL)\n"); 765 return 0; /* XXX */ 766 } 767 return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee); 768} 769 770/* 771 * Convert IEEE channel number to MHz frequency. 772 */ 773u_int 774ieee80211_ieee2mhz(u_int chan, u_int flags) 775{ 776 if (flags & IEEE80211_CHAN_GSM) 777 return 907 + 5 * (chan / 10); 778 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 779 if (chan == 14) 780 return 2484; 781 if (chan < 14) 782 return 2407 + chan*5; 783 else 784 return 2512 + ((chan-15)*20); 785 } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */ 786 if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) { 787 chan -= 37; 788 return 4940 + chan*5 + (chan % 5 ? 2 : 0); 789 } 790 return 5000 + (chan*5); 791 } else { /* either, guess */ 792 /* XXX can't distinguish PSB+GSM channels */ 793 if (chan == 14) 794 return 2484; 795 if (chan < 14) /* 0-13 */ 796 return 2407 + chan*5; 797 if (chan < 27) /* 15-26 */ 798 return 2512 + ((chan-15)*20); 799 return 5000 + (chan*5); 800 } 801} 802 803/* 804 * Locate a channel given a frequency+flags. We cache 805 * the previous lookup to optimize switching between two 806 * channels--as happens with dynamic turbo. 807 */ 808struct ieee80211_channel * 809ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags) 810{ 811 struct ieee80211_channel *c; 812 int i; 813 814 flags &= IEEE80211_CHAN_ALLTURBO; 815 c = ic->ic_prevchan; 816 if (c != NULL && c->ic_freq == freq && 817 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 818 return c; 819 /* brute force search */ 820 for (i = 0; i < ic->ic_nchans; i++) { 821 c = &ic->ic_channels[i]; 822 if (c->ic_freq == freq && 823 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 824 return c; 825 } 826 return NULL; 827} 828 829/* 830 * Locate a channel given a channel number+flags. We cache 831 * the previous lookup to optimize switching between two 832 * channels--as happens with dynamic turbo. 833 */ 834struct ieee80211_channel * 835ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags) 836{ 837 struct ieee80211_channel *c; 838 int i; 839 840 flags &= IEEE80211_CHAN_ALLTURBO; 841 c = ic->ic_prevchan; 842 if (c != NULL && c->ic_ieee == ieee && 843 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 844 return c; 845 /* brute force search */ 846 for (i = 0; i < ic->ic_nchans; i++) { 847 c = &ic->ic_channels[i]; 848 if (c->ic_ieee == ieee && 849 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 850 return c; 851 } 852 return NULL; 853} 854 855static void 856addmedia(struct ifmedia *media, int caps, int addsta, int mode, int mword) 857{ 858#define ADD(_ic, _s, _o) \ 859 ifmedia_add(media, \ 860 IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL) 861 static const u_int mopts[IEEE80211_MODE_MAX] = { 862 [IEEE80211_MODE_AUTO] = IFM_AUTO, 863 [IEEE80211_MODE_11A] = IFM_IEEE80211_11A, 864 [IEEE80211_MODE_11B] = IFM_IEEE80211_11B, 865 [IEEE80211_MODE_11G] = IFM_IEEE80211_11G, 866 [IEEE80211_MODE_FH] = IFM_IEEE80211_FH, 867 [IEEE80211_MODE_TURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO, 868 [IEEE80211_MODE_TURBO_G] = IFM_IEEE80211_11G|IFM_IEEE80211_TURBO, 869 [IEEE80211_MODE_STURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO, 870 [IEEE80211_MODE_11NA] = IFM_IEEE80211_11NA, 871 [IEEE80211_MODE_11NG] = IFM_IEEE80211_11NG, 872 }; 873 u_int mopt; 874 875 mopt = mopts[mode]; 876 if (addsta) 877 ADD(ic, mword, mopt); /* STA mode has no cap */ 878 if (caps & IEEE80211_C_IBSS) 879 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC); 880 if (caps & IEEE80211_C_HOSTAP) 881 ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP); 882 if (caps & IEEE80211_C_AHDEMO) 883 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0); 884 if (caps & IEEE80211_C_MONITOR) 885 ADD(media, mword, mopt | IFM_IEEE80211_MONITOR); 886 if (caps & IEEE80211_C_WDS) 887 ADD(media, mword, mopt | IFM_IEEE80211_WDS); 888#undef ADD 889} 890 891/* 892 * Setup the media data structures according to the channel and 893 * rate tables. 894 */ 895static int 896ieee80211_media_setup(struct ieee80211com *ic, 897 struct ifmedia *media, int caps, int addsta, 898 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) 899{ 900 int i, j, mode, rate, maxrate, mword, r; 901 const struct ieee80211_rateset *rs; 902 struct ieee80211_rateset allrates; 903 904 /* 905 * Fill in media characteristics. 906 */ 907 ifmedia_init(media, 0, media_change, media_stat); 908 maxrate = 0; 909 /* 910 * Add media for legacy operating modes. 911 */ 912 memset(&allrates, 0, sizeof(allrates)); 913 for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) { 914 if (isclr(ic->ic_modecaps, mode)) 915 continue; 916 addmedia(media, caps, addsta, mode, IFM_AUTO); 917 if (mode == IEEE80211_MODE_AUTO) 918 continue; 919 rs = &ic->ic_sup_rates[mode]; 920 for (i = 0; i < rs->rs_nrates; i++) { 921 rate = rs->rs_rates[i]; 922 mword = ieee80211_rate2media(ic, rate, mode); 923 if (mword == 0) 924 continue; 925 addmedia(media, caps, addsta, mode, mword); 926 /* 927 * Add legacy rate to the collection of all rates. 928 */ 929 r = rate & IEEE80211_RATE_VAL; 930 for (j = 0; j < allrates.rs_nrates; j++) 931 if (allrates.rs_rates[j] == r) 932 break; 933 if (j == allrates.rs_nrates) { 934 /* unique, add to the set */ 935 allrates.rs_rates[j] = r; 936 allrates.rs_nrates++; 937 } 938 rate = (rate & IEEE80211_RATE_VAL) / 2; 939 if (rate > maxrate) 940 maxrate = rate; 941 } 942 } 943 for (i = 0; i < allrates.rs_nrates; i++) { 944 mword = ieee80211_rate2media(ic, allrates.rs_rates[i], 945 IEEE80211_MODE_AUTO); 946 if (mword == 0) 947 continue; 948 /* NB: remove media options from mword */ 949 addmedia(media, caps, addsta, 950 IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword)); 951 } 952 /* 953 * Add HT/11n media. Note that we do not have enough 954 * bits in the media subtype to express the MCS so we 955 * use a "placeholder" media subtype and any fixed MCS 956 * must be specified with a different mechanism. 957 */ 958 for (; mode < IEEE80211_MODE_MAX; mode++) { 959 if (isclr(ic->ic_modecaps, mode)) 960 continue; 961 addmedia(media, caps, addsta, mode, IFM_AUTO); 962 addmedia(media, caps, addsta, mode, IFM_IEEE80211_MCS); 963 } 964 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) || 965 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) { 966 addmedia(media, caps, addsta, 967 IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS); 968 /* XXX could walk htrates */ 969 /* XXX known array size */ 970 if (ieee80211_htrates[15].ht40_rate_400ns > maxrate) 971 maxrate = ieee80211_htrates[15].ht40_rate_400ns; 972 } 973 return maxrate; 974} 975 976void 977ieee80211_media_init(struct ieee80211com *ic) 978{ 979 struct ifnet *ifp = ic->ic_ifp; 980 int maxrate; 981 982 /* NB: this works because the structure is initialized to zero */ 983 if (!LIST_EMPTY(&ic->ic_media.ifm_list)) { 984 /* 985 * We are re-initializing the channel list; clear 986 * the existing media state as the media routines 987 * don't suppress duplicates. 988 */ 989 ifmedia_removeall(&ic->ic_media); 990 } 991 ieee80211_chan_init(ic); 992 993 /* 994 * Recalculate media settings in case new channel list changes 995 * the set of available modes. 996 */ 997 maxrate = ieee80211_media_setup(ic, &ic->ic_media, ic->ic_caps, 1, 998 ieee80211com_media_change, ieee80211com_media_status); 999 /* NB: strip explicit mode; we're actually in autoselect */ 1000 ifmedia_set(&ic->ic_media, 1001 media_status(ic->ic_opmode, ic->ic_curchan) &~ 1002 (IFM_MMASK | IFM_IEEE80211_TURBO)); 1003 if (maxrate) 1004 ifp->if_baudrate = IF_Mbps(maxrate); 1005 1006 /* XXX need to propagate new media settings to vap's */ 1007} 1008 1009const struct ieee80211_rateset * 1010ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c) 1011{ 1012 if (IEEE80211_IS_CHAN_HALF(c)) 1013 return &ieee80211_rateset_half; 1014 if (IEEE80211_IS_CHAN_QUARTER(c)) 1015 return &ieee80211_rateset_quarter; 1016 /* XXX does this work for 11ng basic rates? */ 1017 return &ic->ic_sup_rates[ieee80211_chan2mode(c)]; 1018} 1019 1020void 1021ieee80211_announce(struct ieee80211com *ic) 1022{ 1023 struct ifnet *ifp = ic->ic_ifp; 1024 int i, mode, rate, mword; 1025 const struct ieee80211_rateset *rs; 1026 1027 /* NB: skip AUTO since it has no rates */ 1028 for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) { 1029 if (isclr(ic->ic_modecaps, mode)) 1030 continue; 1031 if_printf(ifp, "%s rates: ", ieee80211_phymode_name[mode]); 1032 rs = &ic->ic_sup_rates[mode]; 1033 for (i = 0; i < rs->rs_nrates; i++) { 1034 mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode); 1035 if (mword == 0) 1036 continue; 1037 rate = ieee80211_media2rate(mword); 1038 printf("%s%d%sMbps", (i != 0 ? " " : ""), 1039 rate / 2, ((rate & 0x1) != 0 ? ".5" : "")); 1040 } 1041 printf("\n"); 1042 } 1043 ieee80211_ht_announce(ic); 1044} 1045 1046void 1047ieee80211_announce_channels(struct ieee80211com *ic) 1048{ 1049 const struct ieee80211_channel *c; 1050 char type; 1051 int i, cw; 1052 1053 printf("Chan Freq CW RegPwr MinPwr MaxPwr\n"); 1054 for (i = 0; i < ic->ic_nchans; i++) { 1055 c = &ic->ic_channels[i]; 1056 if (IEEE80211_IS_CHAN_ST(c)) 1057 type = 'S'; 1058 else if (IEEE80211_IS_CHAN_108A(c)) 1059 type = 'T'; 1060 else if (IEEE80211_IS_CHAN_108G(c)) 1061 type = 'G'; 1062 else if (IEEE80211_IS_CHAN_HT(c)) 1063 type = 'n'; 1064 else if (IEEE80211_IS_CHAN_A(c)) 1065 type = 'a'; 1066 else if (IEEE80211_IS_CHAN_ANYG(c)) 1067 type = 'g'; 1068 else if (IEEE80211_IS_CHAN_B(c)) 1069 type = 'b'; 1070 else 1071 type = 'f'; 1072 if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c)) 1073 cw = 40; 1074 else if (IEEE80211_IS_CHAN_HALF(c)) 1075 cw = 10; 1076 else if (IEEE80211_IS_CHAN_QUARTER(c)) 1077 cw = 5; 1078 else 1079 cw = 20; 1080 printf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n" 1081 , c->ic_ieee, c->ic_freq, type 1082 , cw 1083 , IEEE80211_IS_CHAN_HT40U(c) ? '+' : 1084 IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' ' 1085 , c->ic_maxregpower 1086 , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0 1087 , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0 1088 ); 1089 } 1090} 1091 1092static int 1093media2mode(const struct ifmedia_entry *ime, uint32_t flags, uint16_t *mode) 1094{ 1095 switch (IFM_MODE(ime->ifm_media)) { 1096 case IFM_IEEE80211_11A: 1097 *mode = IEEE80211_MODE_11A; 1098 break; 1099 case IFM_IEEE80211_11B: 1100 *mode = IEEE80211_MODE_11B; 1101 break; 1102 case IFM_IEEE80211_11G: 1103 *mode = IEEE80211_MODE_11G; 1104 break; 1105 case IFM_IEEE80211_FH: 1106 *mode = IEEE80211_MODE_FH; 1107 break; 1108 case IFM_IEEE80211_11NA: 1109 *mode = IEEE80211_MODE_11NA; 1110 break; 1111 case IFM_IEEE80211_11NG: 1112 *mode = IEEE80211_MODE_11NG; 1113 break; 1114 case IFM_AUTO: 1115 *mode = IEEE80211_MODE_AUTO; 1116 break; 1117 default: 1118 return 0; 1119 } 1120 /* 1121 * Turbo mode is an ``option''. 1122 * XXX does not apply to AUTO 1123 */ 1124 if (ime->ifm_media & IFM_IEEE80211_TURBO) { 1125 if (*mode == IEEE80211_MODE_11A) { 1126 if (flags & IEEE80211_F_TURBOP) 1127 *mode = IEEE80211_MODE_TURBO_A; 1128 else 1129 *mode = IEEE80211_MODE_STURBO_A; 1130 } else if (*mode == IEEE80211_MODE_11G) 1131 *mode = IEEE80211_MODE_TURBO_G; 1132 else 1133 return 0; 1134 } 1135 /* XXX HT40 +/- */ 1136 return 1; 1137} 1138 1139/* 1140 * Handle a media change request on the underlying interface. 1141 */ 1142int 1143ieee80211com_media_change(struct ifnet *ifp) 1144{ 1145 return EINVAL; 1146} 1147 1148/* 1149 * Handle a media change request on the vap interface. 1150 */ 1151int 1152ieee80211_media_change(struct ifnet *ifp) 1153{ 1154 struct ieee80211vap *vap = ifp->if_softc; 1155 struct ifmedia_entry *ime = vap->iv_media.ifm_cur; 1156 uint16_t newmode; 1157 1158 if (!media2mode(ime, vap->iv_flags, &newmode)) 1159 return EINVAL; 1160 if (vap->iv_des_mode != newmode) { 1161 vap->iv_des_mode = newmode; 1162 return ENETRESET; 1163 } 1164 return 0; 1165} 1166 1167/* 1168 * Common code to calculate the media status word 1169 * from the operating mode and channel state. 1170 */ 1171static int 1172media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan) 1173{ 1174 int status; 1175 1176 status = IFM_IEEE80211; 1177 switch (opmode) { 1178 case IEEE80211_M_STA: 1179 break; 1180 case IEEE80211_M_IBSS: 1181 status |= IFM_IEEE80211_ADHOC; 1182 break; 1183 case IEEE80211_M_HOSTAP: 1184 status |= IFM_IEEE80211_HOSTAP; 1185 break; 1186 case IEEE80211_M_MONITOR: 1187 status |= IFM_IEEE80211_MONITOR; 1188 break; 1189 case IEEE80211_M_AHDEMO: 1190 status |= IFM_IEEE80211_ADHOC | IFM_FLAG0; 1191 break; 1192 case IEEE80211_M_WDS: 1193 status |= IFM_IEEE80211_WDS; 1194 break; 1195 } 1196 if (IEEE80211_IS_CHAN_HTA(chan)) { 1197 status |= IFM_IEEE80211_11NA; 1198 } else if (IEEE80211_IS_CHAN_HTG(chan)) { 1199 status |= IFM_IEEE80211_11NG; 1200 } else if (IEEE80211_IS_CHAN_A(chan)) { 1201 status |= IFM_IEEE80211_11A; 1202 } else if (IEEE80211_IS_CHAN_B(chan)) { 1203 status |= IFM_IEEE80211_11B; 1204 } else if (IEEE80211_IS_CHAN_ANYG(chan)) { 1205 status |= IFM_IEEE80211_11G; 1206 } else if (IEEE80211_IS_CHAN_FHSS(chan)) { 1207 status |= IFM_IEEE80211_FH; 1208 } 1209 /* XXX else complain? */ 1210 1211 if (IEEE80211_IS_CHAN_TURBO(chan)) 1212 status |= IFM_IEEE80211_TURBO; 1213#if 0 1214 if (IEEE80211_IS_CHAN_HT20(chan)) 1215 status |= IFM_IEEE80211_HT20; 1216 if (IEEE80211_IS_CHAN_HT40(chan)) 1217 status |= IFM_IEEE80211_HT40; 1218#endif 1219 return status; 1220} 1221 1222static void 1223ieee80211com_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1224{ 1225 struct ieee80211com *ic = ifp->if_l2com; 1226 struct ieee80211vap *vap; 1227 1228 imr->ifm_status = IFM_AVALID; 1229 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1230 if (vap->iv_ifp->if_flags & IFF_UP) { 1231 imr->ifm_status |= IFM_ACTIVE; 1232 break; 1233 } 1234 imr->ifm_active = media_status(ic->ic_opmode, ic->ic_curchan); 1235 if (imr->ifm_status & IFM_ACTIVE) 1236 imr->ifm_current = imr->ifm_active; 1237} 1238 1239void 1240ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1241{ 1242 struct ieee80211vap *vap = ifp->if_softc; 1243 struct ieee80211com *ic = vap->iv_ic; 1244 enum ieee80211_phymode mode; 1245 1246 imr->ifm_status = IFM_AVALID; 1247 /* 1248 * NB: use the current channel's mode to lock down a xmit 1249 * rate only when running; otherwise we may have a mismatch 1250 * in which case the rate will not be convertible. 1251 */ 1252 if (vap->iv_state == IEEE80211_S_RUN) { 1253 imr->ifm_status |= IFM_ACTIVE; 1254 mode = ieee80211_chan2mode(ic->ic_curchan); 1255 } else 1256 mode = IEEE80211_MODE_AUTO; 1257 imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan); 1258 /* 1259 * Calculate a current rate if possible. 1260 */ 1261 if (vap->iv_txparms[mode].ucastrate != IEEE80211_FIXED_RATE_NONE) { 1262 /* 1263 * A fixed rate is set, report that. 1264 */ 1265 imr->ifm_active |= ieee80211_rate2media(ic, 1266 vap->iv_txparms[mode].ucastrate, mode); 1267 } else if (vap->iv_opmode == IEEE80211_M_STA) { 1268 /* 1269 * In station mode report the current transmit rate. 1270 */ 1271 imr->ifm_active |= ieee80211_rate2media(ic, 1272 vap->iv_bss->ni_txrate, mode); 1273 } else 1274 imr->ifm_active |= IFM_AUTO; 1275 if (imr->ifm_status & IFM_ACTIVE) 1276 imr->ifm_current = imr->ifm_active; 1277} 1278 1279/* 1280 * Set the current phy mode and recalculate the active channel 1281 * set based on the available channels for this mode. Also 1282 * select a new default/current channel if the current one is 1283 * inappropriate for this mode. 1284 */ 1285int 1286ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode) 1287{ 1288 /* 1289 * Adjust basic rates in 11b/11g supported rate set. 1290 * Note that if operating on a hal/quarter rate channel 1291 * this is a noop as those rates sets are different 1292 * and used instead. 1293 */ 1294 if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B) 1295 ieee80211_setbasicrates(&ic->ic_sup_rates[mode], mode); 1296 1297 ic->ic_curmode = mode; 1298 ieee80211_reset_erp(ic); /* reset ERP state */ 1299 1300 return 0; 1301} 1302 1303/* 1304 * Return the phy mode for with the specified channel. 1305 */ 1306enum ieee80211_phymode 1307ieee80211_chan2mode(const struct ieee80211_channel *chan) 1308{ 1309 1310 if (IEEE80211_IS_CHAN_HTA(chan)) 1311 return IEEE80211_MODE_11NA; 1312 else if (IEEE80211_IS_CHAN_HTG(chan)) 1313 return IEEE80211_MODE_11NG; 1314 else if (IEEE80211_IS_CHAN_108G(chan)) 1315 return IEEE80211_MODE_TURBO_G; 1316 else if (IEEE80211_IS_CHAN_ST(chan)) 1317 return IEEE80211_MODE_STURBO_A; 1318 else if (IEEE80211_IS_CHAN_TURBO(chan)) 1319 return IEEE80211_MODE_TURBO_A; 1320 else if (IEEE80211_IS_CHAN_A(chan)) 1321 return IEEE80211_MODE_11A; 1322 else if (IEEE80211_IS_CHAN_ANYG(chan)) 1323 return IEEE80211_MODE_11G; 1324 else if (IEEE80211_IS_CHAN_B(chan)) 1325 return IEEE80211_MODE_11B; 1326 else if (IEEE80211_IS_CHAN_FHSS(chan)) 1327 return IEEE80211_MODE_FH; 1328 1329 /* NB: should not get here */ 1330 printf("%s: cannot map channel to mode; freq %u flags 0x%x\n", 1331 __func__, chan->ic_freq, chan->ic_flags); 1332 return IEEE80211_MODE_11B; 1333} 1334 1335struct ratemedia { 1336 u_int match; /* rate + mode */ 1337 u_int media; /* if_media rate */ 1338}; 1339 1340static int 1341findmedia(const struct ratemedia rates[], int n, u_int match) 1342{ 1343 int i; 1344 1345 for (i = 0; i < n; i++) 1346 if (rates[i].match == match) 1347 return rates[i].media; 1348 return IFM_AUTO; 1349} 1350 1351/* 1352 * Convert IEEE80211 rate value to ifmedia subtype. 1353 * Rate is either a legacy rate in units of 0.5Mbps 1354 * or an MCS index. 1355 */ 1356int 1357ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode) 1358{ 1359#define N(a) (sizeof(a) / sizeof(a[0])) 1360 static const struct ratemedia rates[] = { 1361 { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 }, 1362 { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 }, 1363 { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 }, 1364 { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 }, 1365 { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 }, 1366 { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 }, 1367 { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 }, 1368 { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 }, 1369 { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 }, 1370 { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 }, 1371 { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 }, 1372 { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 }, 1373 { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 }, 1374 { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 }, 1375 { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 }, 1376 { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 }, 1377 { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 }, 1378 { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 }, 1379 { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 }, 1380 { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 }, 1381 { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 }, 1382 { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 }, 1383 { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 }, 1384 { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 }, 1385 { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 }, 1386 { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 }, 1387 { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 }, 1388 { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 }, 1389 { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 }, 1390 { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 }, 1391 /* NB: OFDM72 doesn't realy exist so we don't handle it */ 1392 }; 1393 static const struct ratemedia htrates[] = { 1394 { 0, IFM_IEEE80211_MCS }, 1395 { 1, IFM_IEEE80211_MCS }, 1396 { 2, IFM_IEEE80211_MCS }, 1397 { 3, IFM_IEEE80211_MCS }, 1398 { 4, IFM_IEEE80211_MCS }, 1399 { 5, IFM_IEEE80211_MCS }, 1400 { 6, IFM_IEEE80211_MCS }, 1401 { 7, IFM_IEEE80211_MCS }, 1402 { 8, IFM_IEEE80211_MCS }, 1403 { 9, IFM_IEEE80211_MCS }, 1404 { 10, IFM_IEEE80211_MCS }, 1405 { 11, IFM_IEEE80211_MCS }, 1406 { 12, IFM_IEEE80211_MCS }, 1407 { 13, IFM_IEEE80211_MCS }, 1408 { 14, IFM_IEEE80211_MCS }, 1409 { 15, IFM_IEEE80211_MCS }, 1410 }; 1411 int m; 1412 1413 /* 1414 * Check 11n rates first for match as an MCS. 1415 */ 1416 if (mode == IEEE80211_MODE_11NA) { 1417 if (rate & IEEE80211_RATE_MCS) { 1418 rate &= ~IEEE80211_RATE_MCS; 1419 m = findmedia(htrates, N(htrates), rate); 1420 if (m != IFM_AUTO) 1421 return m | IFM_IEEE80211_11NA; 1422 } 1423 } else if (mode == IEEE80211_MODE_11NG) { 1424 /* NB: 12 is ambiguous, it will be treated as an MCS */ 1425 if (rate & IEEE80211_RATE_MCS) { 1426 rate &= ~IEEE80211_RATE_MCS; 1427 m = findmedia(htrates, N(htrates), rate); 1428 if (m != IFM_AUTO) 1429 return m | IFM_IEEE80211_11NG; 1430 } 1431 } 1432 rate &= IEEE80211_RATE_VAL; 1433 switch (mode) { 1434 case IEEE80211_MODE_11A: 1435 case IEEE80211_MODE_11NA: 1436 case IEEE80211_MODE_TURBO_A: 1437 case IEEE80211_MODE_STURBO_A: 1438 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11A); 1439 case IEEE80211_MODE_11B: 1440 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11B); 1441 case IEEE80211_MODE_FH: 1442 return findmedia(rates, N(rates), rate | IFM_IEEE80211_FH); 1443 case IEEE80211_MODE_AUTO: 1444 /* NB: ic may be NULL for some drivers */ 1445 if (ic != NULL && ic->ic_phytype == IEEE80211_T_FH) 1446 return findmedia(rates, N(rates), 1447 rate | IFM_IEEE80211_FH); 1448 /* NB: hack, 11g matches both 11b+11a rates */ 1449 /* fall thru... */ 1450 case IEEE80211_MODE_11G: 1451 case IEEE80211_MODE_11NG: 1452 case IEEE80211_MODE_TURBO_G: 1453 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11G); 1454 } 1455 return IFM_AUTO; 1456#undef N 1457} 1458 1459int 1460ieee80211_media2rate(int mword) 1461{ 1462#define N(a) (sizeof(a) / sizeof(a[0])) 1463 static const int ieeerates[] = { 1464 -1, /* IFM_AUTO */ 1465 0, /* IFM_MANUAL */ 1466 0, /* IFM_NONE */ 1467 2, /* IFM_IEEE80211_FH1 */ 1468 4, /* IFM_IEEE80211_FH2 */ 1469 2, /* IFM_IEEE80211_DS1 */ 1470 4, /* IFM_IEEE80211_DS2 */ 1471 11, /* IFM_IEEE80211_DS5 */ 1472 22, /* IFM_IEEE80211_DS11 */ 1473 44, /* IFM_IEEE80211_DS22 */ 1474 12, /* IFM_IEEE80211_OFDM6 */ 1475 18, /* IFM_IEEE80211_OFDM9 */ 1476 24, /* IFM_IEEE80211_OFDM12 */ 1477 36, /* IFM_IEEE80211_OFDM18 */ 1478 48, /* IFM_IEEE80211_OFDM24 */ 1479 72, /* IFM_IEEE80211_OFDM36 */ 1480 96, /* IFM_IEEE80211_OFDM48 */ 1481 108, /* IFM_IEEE80211_OFDM54 */ 1482 144, /* IFM_IEEE80211_OFDM72 */ 1483 0, /* IFM_IEEE80211_DS354k */ 1484 0, /* IFM_IEEE80211_DS512k */ 1485 6, /* IFM_IEEE80211_OFDM3 */ 1486 9, /* IFM_IEEE80211_OFDM4 */ 1487 54, /* IFM_IEEE80211_OFDM27 */ 1488 -1, /* IFM_IEEE80211_MCS */ 1489 }; 1490 return IFM_SUBTYPE(mword) < N(ieeerates) ? 1491 ieeerates[IFM_SUBTYPE(mword)] : 0; 1492#undef N 1493} 1494