ieee80211.c revision 178694
1/*- 2 * Copyright (c) 2001 Atsushi Onoe 3 * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD: head/sys/net80211/ieee80211.c 178694 2008-04-30 16:05:57Z 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[] = { 53 "auto", /* IEEE80211_MODE_AUTO */ 54 "11a", /* IEEE80211_MODE_11A */ 55 "11b", /* IEEE80211_MODE_11B */ 56 "11g", /* IEEE80211_MODE_11G */ 57 "FH", /* IEEE80211_MODE_FH */ 58 "turboA", /* IEEE80211_MODE_TURBO_A */ 59 "turboG", /* IEEE80211_MODE_TURBO_G */ 60 "sturboA", /* IEEE80211_MODE_STURBO_A */ 61 "11na", /* IEEE80211_MODE_11NA */ 62 "11ng", /* IEEE80211_MODE_11NG */ 63}; 64static const uint8_t ieee80211broadcastaddr[IEEE80211_ADDR_LEN] = 65 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 66 67static void ieee80211_syncflag_locked(struct ieee80211com *ic, int flag); 68static void ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag); 69static int ieee80211_media_setup(struct ieee80211com *ic, 70 struct ifmedia *media, int caps, int addsta, 71 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat); 72static void ieee80211com_media_status(struct ifnet *, struct ifmediareq *); 73static int ieee80211com_media_change(struct ifnet *); 74static int media_status(enum ieee80211_opmode, 75 const struct ieee80211_channel *); 76 77MALLOC_DEFINE(M_80211_VAP, "80211vap", "802.11 vap state"); 78 79/* 80 * Default supported rates for 802.11 operation (in IEEE .5Mb units). 81 */ 82#define B(r) ((r) | IEEE80211_RATE_BASIC) 83static const struct ieee80211_rateset ieee80211_rateset_11a = 84 { 8, { B(12), 18, B(24), 36, B(48), 72, 96, 108 } }; 85static const struct ieee80211_rateset ieee80211_rateset_half = 86 { 8, { B(6), 9, B(12), 18, B(24), 36, 48, 54 } }; 87static const struct ieee80211_rateset ieee80211_rateset_quarter = 88 { 8, { B(3), 4, B(6), 9, B(12), 18, 24, 27 } }; 89static const struct ieee80211_rateset ieee80211_rateset_11b = 90 { 4, { B(2), B(4), B(11), B(22) } }; 91/* NB: OFDM rates are handled specially based on mode */ 92static const struct ieee80211_rateset ieee80211_rateset_11g = 93 { 12, { B(2), B(4), B(11), B(22), 12, 18, 24, 36, 48, 72, 96, 108 } }; 94#undef B 95 96/* 97 * Fill in 802.11 available channel set, mark 98 * all available channels as active, and pick 99 * a default channel if not already specified. 100 */ 101static void 102ieee80211_chan_init(struct ieee80211com *ic) 103{ 104#define DEFAULTRATES(m, def) do { \ 105 if (isset(ic->ic_modecaps, m) && ic->ic_sup_rates[m].rs_nrates == 0) \ 106 ic->ic_sup_rates[m] = def; \ 107} while (0) 108 struct ieee80211_channel *c; 109 int i; 110 111 KASSERT(0 < ic->ic_nchans && ic->ic_nchans < IEEE80211_CHAN_MAX, 112 ("invalid number of channels specified: %u", ic->ic_nchans)); 113 memset(ic->ic_chan_avail, 0, sizeof(ic->ic_chan_avail)); 114 memset(ic->ic_modecaps, 0, sizeof(ic->ic_modecaps)); 115 setbit(ic->ic_modecaps, IEEE80211_MODE_AUTO); 116 for (i = 0; i < ic->ic_nchans; i++) { 117 c = &ic->ic_channels[i]; 118 KASSERT(c->ic_flags != 0, ("channel with no flags")); 119 KASSERT(c->ic_ieee < IEEE80211_CHAN_MAX, 120 ("channel with bogus ieee number %u", c->ic_ieee)); 121 setbit(ic->ic_chan_avail, c->ic_ieee); 122 /* 123 * Identify mode capabilities. 124 */ 125 if (IEEE80211_IS_CHAN_A(c)) 126 setbit(ic->ic_modecaps, IEEE80211_MODE_11A); 127 if (IEEE80211_IS_CHAN_B(c)) 128 setbit(ic->ic_modecaps, IEEE80211_MODE_11B); 129 if (IEEE80211_IS_CHAN_ANYG(c)) 130 setbit(ic->ic_modecaps, IEEE80211_MODE_11G); 131 if (IEEE80211_IS_CHAN_FHSS(c)) 132 setbit(ic->ic_modecaps, IEEE80211_MODE_FH); 133 if (IEEE80211_IS_CHAN_108A(c)) 134 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_A); 135 if (IEEE80211_IS_CHAN_108G(c)) 136 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_G); 137 if (IEEE80211_IS_CHAN_ST(c)) 138 setbit(ic->ic_modecaps, IEEE80211_MODE_STURBO_A); 139 if (IEEE80211_IS_CHAN_HTA(c)) 140 setbit(ic->ic_modecaps, IEEE80211_MODE_11NA); 141 if (IEEE80211_IS_CHAN_HTG(c)) 142 setbit(ic->ic_modecaps, IEEE80211_MODE_11NG); 143 } 144 /* initialize candidate channels to all available */ 145 memcpy(ic->ic_chan_active, ic->ic_chan_avail, 146 sizeof(ic->ic_chan_avail)); 147 148 /* sort channel table to allow lookup optimizations */ 149 ieee80211_sort_channels(ic->ic_channels, ic->ic_nchans); 150 151 /* invalidate any previous state */ 152 ic->ic_bsschan = IEEE80211_CHAN_ANYC; 153 ic->ic_prevchan = NULL; 154 ic->ic_csa_newchan = NULL; 155 /* arbitrarily pick the first channel */ 156 ic->ic_curchan = &ic->ic_channels[0]; 157 158 /* fillin well-known rate sets if driver has not specified */ 159 DEFAULTRATES(IEEE80211_MODE_11B, ieee80211_rateset_11b); 160 DEFAULTRATES(IEEE80211_MODE_11G, ieee80211_rateset_11g); 161 DEFAULTRATES(IEEE80211_MODE_11A, ieee80211_rateset_11a); 162 DEFAULTRATES(IEEE80211_MODE_TURBO_A, ieee80211_rateset_11a); 163 DEFAULTRATES(IEEE80211_MODE_TURBO_G, ieee80211_rateset_11g); 164 165 /* 166 * Set auto mode to reset active channel state and any desired channel. 167 */ 168 (void) ieee80211_setmode(ic, IEEE80211_MODE_AUTO); 169#undef DEFAULTRATES 170} 171 172static void 173null_update_mcast(struct ifnet *ifp) 174{ 175 if_printf(ifp, "need multicast update callback\n"); 176} 177 178static void 179null_update_promisc(struct ifnet *ifp) 180{ 181 if_printf(ifp, "need promiscuous mode update callback\n"); 182} 183 184static int 185null_output(struct ifnet *ifp, struct mbuf *m, 186 struct sockaddr *dst, struct rtentry *rt0) 187{ 188 if_printf(ifp, "discard raw packet\n"); 189 m_freem(m); 190 return EIO; 191} 192 193static void 194null_input(struct ifnet *ifp, struct mbuf *m) 195{ 196 if_printf(ifp, "if_input should not be called\n"); 197 m_freem(m); 198} 199 200/* 201 * Attach/setup the common net80211 state. Called by 202 * the driver on attach to prior to creating any vap's. 203 */ 204void 205ieee80211_ifattach(struct ieee80211com *ic) 206{ 207 struct ifnet *ifp = ic->ic_ifp; 208 struct sockaddr_dl *sdl; 209 struct ifaddr *ifa; 210 211 KASSERT(ifp->if_type == IFT_IEEE80211, ("if_type %d", ifp->if_type)); 212 213 IEEE80211_LOCK_INIT(ic, "ieee80211com"); 214 TAILQ_INIT(&ic->ic_vaps); 215 /* 216 * Fill in 802.11 available channel set, mark all 217 * available channels as active, and pick a default 218 * channel if not already specified. 219 */ 220 ieee80211_media_init(ic); 221 222 ic->ic_update_mcast = null_update_mcast; 223 ic->ic_update_promisc = null_update_promisc; 224 225 ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT; 226 ic->ic_lintval = ic->ic_bintval; 227 ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX; 228 229 ieee80211_crypto_attach(ic); 230 ieee80211_node_attach(ic); 231 ieee80211_power_attach(ic); 232 ieee80211_proto_attach(ic); 233 ieee80211_ht_attach(ic); 234 ieee80211_scan_attach(ic); 235 ieee80211_regdomain_attach(ic); 236 237 ieee80211_sysctl_attach(ic); 238 239 ifp->if_addrlen = IEEE80211_ADDR_LEN; 240 ifp->if_hdrlen = 0; 241 if_attach(ifp); 242 ifp->if_mtu = IEEE80211_MTU_MAX; 243 ifp->if_broadcastaddr = ieee80211broadcastaddr; 244 ifp->if_output = null_output; 245 ifp->if_input = null_input; /* just in case */ 246 ifp->if_resolvemulti = NULL; /* NB: callers check */ 247 248 ifa = ifaddr_byindex(ifp->if_index); 249 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); 250 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 251 sdl->sdl_type = IFT_ETHER; /* XXX IFT_IEEE80211? */ 252 sdl->sdl_alen = IEEE80211_ADDR_LEN; 253 IEEE80211_ADDR_COPY(LLADDR(sdl), ic->ic_myaddr); 254} 255 256/* 257 * Detach net80211 state on device detach. Tear down 258 * all vap's and reclaim all common state prior to the 259 * device state going away. Note we may call back into 260 * driver; it must be prepared for this. 261 */ 262void 263ieee80211_ifdetach(struct ieee80211com *ic) 264{ 265 struct ifnet *ifp = ic->ic_ifp; 266 struct ieee80211vap *vap; 267 268 /* XXX ieee80211_stop_all? */ 269 while ((vap = TAILQ_FIRST(&ic->ic_vaps)) != NULL) 270 ieee80211_vap_destroy(vap); 271 272 ieee80211_sysctl_detach(ic); 273 ieee80211_regdomain_detach(ic); 274 ieee80211_scan_detach(ic); 275 ieee80211_ht_detach(ic); 276 /* NB: must be called before ieee80211_node_detach */ 277 ieee80211_proto_detach(ic); 278 ieee80211_crypto_detach(ic); 279 ieee80211_power_detach(ic); 280 ieee80211_node_detach(ic); 281 ifmedia_removeall(&ic->ic_media); 282 283 IEEE80211_LOCK_DESTROY(ic); 284 if_detach(ifp); 285} 286 287/* 288 * Default reset method for use with the ioctl support. This 289 * method is invoked after any state change in the 802.11 290 * layer that should be propagated to the hardware but not 291 * require re-initialization of the 802.11 state machine (e.g 292 * rescanning for an ap). We always return ENETRESET which 293 * should cause the driver to re-initialize the device. Drivers 294 * can override this method to implement more optimized support. 295 */ 296static int 297default_reset(struct ieee80211vap *vap, u_long cmd) 298{ 299 return ENETRESET; 300} 301 302/* 303 * Prepare a vap for use. Drivers use this call to 304 * setup net80211 state in new vap's prior attaching 305 * them with ieee80211_vap_attach (below). 306 */ 307int 308ieee80211_vap_setup(struct ieee80211com *ic, struct ieee80211vap *vap, 309 const char name[IFNAMSIZ], int unit, int opmode, int flags, 310 const uint8_t bssid[IEEE80211_ADDR_LEN], 311 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 312{ 313#define IEEE80211_C_OPMODE \ 314 (IEEE80211_C_IBSS | IEEE80211_C_HOSTAP | IEEE80211_C_AHDEMO | \ 315 IEEE80211_C_MONITOR | IEEE80211_C_WDS) 316 struct ifnet *ifp; 317 318 ifp = if_alloc(IFT_ETHER); 319 if (ifp == NULL) { 320 if_printf(ic->ic_ifp, "%s: unable to allocate ifnet\n", 321 __func__); 322 return ENOMEM; 323 } 324 if_initname(ifp, name, unit); 325 ifp->if_softc = vap; /* back pointer */ 326 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 327 ifp->if_start = ieee80211_start; 328 ifp->if_ioctl = ieee80211_ioctl; 329 ifp->if_watchdog = NULL; /* NB: no watchdog routine */ 330 ifp->if_init = ieee80211_init; 331 /* NB: input+output filled in by ether_ifattach */ 332 IFQ_SET_MAXLEN(&ifp->if_snd, IFQ_MAXLEN); 333 ifp->if_snd.ifq_drv_maxlen = IFQ_MAXLEN; 334 IFQ_SET_READY(&ifp->if_snd); 335 336 vap->iv_ifp = ifp; 337 vap->iv_ic = ic; 338 vap->iv_flags = ic->ic_flags; /* propagate common flags */ 339 vap->iv_flags_ext = ic->ic_flags_ext; 340 vap->iv_flags_ven = ic->ic_flags_ven; 341 vap->iv_caps = ic->ic_caps &~ IEEE80211_C_OPMODE; 342 vap->iv_htcaps = ic->ic_htcaps; 343 vap->iv_opmode = opmode; 344 switch (opmode) { 345 case IEEE80211_M_STA: 346 /* auto-enable s/w beacon miss support */ 347 if (flags & IEEE80211_CLONE_NOBEACONS) 348 vap->iv_flags_ext |= IEEE80211_FEXT_SWBMISS; 349 break; 350 case IEEE80211_M_IBSS: 351 vap->iv_caps |= IEEE80211_C_IBSS; 352 break; 353 case IEEE80211_M_AHDEMO: 354 vap->iv_caps |= IEEE80211_C_AHDEMO; 355 break; 356 case IEEE80211_M_HOSTAP: 357 vap->iv_caps |= IEEE80211_C_HOSTAP; 358 break; 359 case IEEE80211_M_MONITOR: 360 vap->iv_caps |= IEEE80211_C_MONITOR; 361 break; 362 case IEEE80211_M_WDS: 363 vap->iv_caps |= IEEE80211_C_WDS; 364 /* 365 * WDS links must specify the bssid of the far end. 366 * For legacy operation this is a static relationship. 367 * For non-legacy operation the station must associate 368 * and be authorized to pass traffic. Plumbing the 369 * vap to the proper node happens when the vap 370 * transitions to RUN state. 371 */ 372 IEEE80211_ADDR_COPY(vap->iv_des_bssid, bssid); 373 vap->iv_flags |= IEEE80211_F_DESBSSID; 374 if (flags & IEEE80211_CLONE_WDSLEGACY) 375 vap->iv_flags_ext |= IEEE80211_FEXT_WDSLEGACY; 376 break; 377 } 378 /* 379 * Enable various functionality by default if we're 380 * capable; the driver can override us if it knows better. 381 */ 382#if 0 383 /* XXX temp disable until we resolve regressions */ 384 if (vap->iv_caps & IEEE80211_C_WME) 385 vap->iv_flags |= IEEE80211_F_WME; 386#endif 387 if (vap->iv_caps & IEEE80211_C_BURST) 388 vap->iv_flags |= IEEE80211_F_BURST; 389 if (vap->iv_caps & IEEE80211_C_FF) 390 vap->iv_flags |= IEEE80211_F_FF; 391 if (vap->iv_caps & IEEE80211_C_TURBOP) 392 vap->iv_flags |= IEEE80211_F_TURBOP; 393 /* NB: bg scanning only makes sense for station mode right now */ 394 if (vap->iv_opmode == IEEE80211_M_STA && 395 (vap->iv_caps & IEEE80211_C_BGSCAN)) 396 vap->iv_flags |= IEEE80211_F_BGSCAN; 397 vap->iv_flags |= IEEE80211_F_DOTH; /* XXX out of caps, just ena */ 398 /* XXX out of caps, just ena */ 399 if (vap->iv_opmode == IEEE80211_M_HOSTAP) 400 vap->iv_flags_ext |= IEEE80211_FEXT_DFS; 401 402 vap->iv_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */ 403 vap->iv_bmissthreshold = IEEE80211_HWBMISS_DEFAULT; 404 vap->iv_dtim_period = IEEE80211_DTIM_DEFAULT; 405 /* 406 * Install a default reset method for the ioctl support; 407 * the driver can override this. 408 */ 409 vap->iv_reset = default_reset; 410 411 IEEE80211_ADDR_COPY(vap->iv_myaddr, macaddr); 412 413 ieee80211_sysctl_vattach(vap); 414 ieee80211_crypto_vattach(vap); 415 ieee80211_node_vattach(vap); 416 ieee80211_power_vattach(vap); 417 ieee80211_proto_vattach(vap); 418 ieee80211_ht_vattach(vap); 419 ieee80211_scan_vattach(vap); 420 ieee80211_regdomain_vattach(vap); 421 422 return 0; 423#undef IEEE80211_C_OPMODE 424} 425 426/* 427 * Activate a vap. State should have been prepared with a 428 * call to ieee80211_vap_setup and by the driver. On return 429 * from this call the vap is ready for use. 430 */ 431int 432ieee80211_vap_attach(struct ieee80211vap *vap, 433 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) 434{ 435 struct ifnet *ifp = vap->iv_ifp; 436 struct ieee80211com *ic = vap->iv_ic; 437 struct ifmediareq imr; 438 int maxrate; 439 440 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 441 "%s: %s parent %s flags 0x%x flags_ext 0x%x\n", 442 __func__, ieee80211_opmode_name[vap->iv_opmode], 443 ic->ic_ifp->if_xname, vap->iv_flags, vap->iv_flags_ext); 444 445 /* 446 * Do late attach work that cannot happen until after 447 * the driver has had a chance to override defaults. 448 */ 449 ieee80211_node_latevattach(vap); 450 ieee80211_power_latevattach(vap); 451 452 maxrate = ieee80211_media_setup(ic, &vap->iv_media, vap->iv_caps, 453 vap->iv_opmode == IEEE80211_M_STA, media_change, media_stat); 454 ieee80211_media_status(ifp, &imr); 455 /* NB: strip explicit mode; we're actually in autoselect */ 456 ifmedia_set(&vap->iv_media, imr.ifm_active &~ IFM_MMASK); 457 if (maxrate) 458 ifp->if_baudrate = IF_Mbps(maxrate); 459 460 ether_ifattach(ifp, vap->iv_myaddr); 461 /* hook output method setup by ether_ifattach */ 462 vap->iv_output = ifp->if_output; 463 ifp->if_output = ieee80211_output; 464 /* NB: if_mtu set by ether_ifattach to ETHERMTU */ 465 bpfattach2(ifp, DLT_IEEE802_11, ifp->if_hdrlen, &vap->iv_rawbpf); 466 467 IEEE80211_LOCK(ic); 468 TAILQ_INSERT_TAIL(&ic->ic_vaps, vap, iv_next); 469 ieee80211_syncflag_locked(ic, IEEE80211_F_WME); 470 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); 471 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); 472 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); 473 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_HT); 474 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_USEHT40); 475 ieee80211_syncifflag_locked(ic, IFF_PROMISC); 476 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI); 477 IEEE80211_UNLOCK(ic); 478 479 return 1; 480} 481 482/* 483 * Tear down vap state and reclaim the ifnet. 484 * The driver is assumed to have prepared for 485 * this; e.g. by turning off interrupts for the 486 * underlying device. 487 */ 488void 489ieee80211_vap_detach(struct ieee80211vap *vap) 490{ 491 struct ieee80211com *ic = vap->iv_ic; 492 struct ifnet *ifp = vap->iv_ifp; 493 494 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s parent %s\n", 495 __func__, ieee80211_opmode_name[vap->iv_opmode], 496 ic->ic_ifp->if_xname); 497 498 IEEE80211_LOCK(ic); 499 /* block traffic from above */ 500 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 501 /* 502 * Evil hack. Clear the backpointer from the ifnet to the 503 * vap so any requests from above will return an error or 504 * be ignored. In particular this short-circuits requests 505 * by the bridge to turn off promiscuous mode as a result 506 * of calling ether_ifdetach. 507 */ 508 ifp->if_softc = NULL; 509 /* 510 * Stop the vap before detaching the ifnet. Ideally we'd 511 * do this in the other order so the ifnet is inaccessible 512 * while we cleanup internal state but that is hard. 513 */ 514 ieee80211_stop_locked(vap); 515 516 /* XXX accumulate iv_stats in ic_stats? */ 517 TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next); 518 ieee80211_syncflag_locked(ic, IEEE80211_F_WME); 519 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); 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 /* XXX can't hold com lock */ 529 /* NB: bpfattach is called by ether_ifdetach and claims all taps */ 530 ether_ifdetach(ifp); 531 532 ifmedia_removeall(&vap->iv_media); 533 534 ieee80211_regdomain_vdetach(vap); 535 ieee80211_scan_vdetach(vap); 536 ieee80211_ht_vdetach(vap); 537 /* NB: must be before ieee80211_node_vdetach */ 538 ieee80211_proto_vdetach(vap); 539 ieee80211_crypto_vdetach(vap); 540 ieee80211_power_vdetach(vap); 541 ieee80211_node_vdetach(vap); 542 ieee80211_sysctl_vdetach(vap); 543} 544 545/* 546 * Synchronize flag bit state in the parent ifnet structure 547 * according to the state of all vap ifnet's. This is used, 548 * for example, to handle IFF_PROMISC and IFF_ALLMULTI. 549 */ 550void 551ieee80211_syncifflag_locked(struct ieee80211com *ic, int flag) 552{ 553 struct ifnet *ifp = ic->ic_ifp; 554 struct ieee80211vap *vap; 555 int bit, oflags; 556 557 IEEE80211_LOCK_ASSERT(ic); 558 559 bit = 0; 560 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 561 if (vap->iv_ifp->if_flags & flag) { 562 /* 563 * XXX the bridge sets PROMISC but we don't want to 564 * enable it on the device, discard here so all the 565 * drivers don't need to special-case it 566 */ 567 if (flag == IFF_PROMISC && 568 vap->iv_opmode == IEEE80211_M_HOSTAP) 569 continue; 570 bit = 1; 571 break; 572 } 573 oflags = ifp->if_flags; 574 if (bit) 575 ifp->if_flags |= flag; 576 else 577 ifp->if_flags &= ~flag; 578 if ((ifp->if_flags ^ oflags) & flag) { 579 /* XXX should we return 1/0 and let caller do this? */ 580 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 581 if (flag == IFF_PROMISC) 582 ic->ic_update_promisc(ifp); 583 else if (flag == IFF_ALLMULTI) 584 ic->ic_update_mcast(ifp); 585 } 586 } 587} 588 589/* 590 * Synchronize flag bit state in the com structure 591 * according to the state of all vap's. This is used, 592 * for example, to handle state changes via ioctls. 593 */ 594static void 595ieee80211_syncflag_locked(struct ieee80211com *ic, int flag) 596{ 597 struct ieee80211vap *vap; 598 int bit; 599 600 IEEE80211_LOCK_ASSERT(ic); 601 602 bit = 0; 603 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 604 if (vap->iv_flags & flag) { 605 bit = 1; 606 break; 607 } 608 if (bit) 609 ic->ic_flags |= flag; 610 else 611 ic->ic_flags &= ~flag; 612} 613 614void 615ieee80211_syncflag(struct ieee80211vap *vap, int flag) 616{ 617 struct ieee80211com *ic = vap->iv_ic; 618 619 IEEE80211_LOCK(ic); 620 if (flag < 0) { 621 flag = -flag; 622 vap->iv_flags &= ~flag; 623 } else 624 vap->iv_flags |= flag; 625 ieee80211_syncflag_locked(ic, flag); 626 IEEE80211_UNLOCK(ic); 627} 628 629/* 630 * Synchronize flag bit state in the com structure 631 * according to the state of all vap's. This is used, 632 * for example, to handle state changes via ioctls. 633 */ 634static void 635ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag) 636{ 637 struct ieee80211vap *vap; 638 int bit; 639 640 IEEE80211_LOCK_ASSERT(ic); 641 642 bit = 0; 643 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 644 if (vap->iv_flags_ext & flag) { 645 bit = 1; 646 break; 647 } 648 if (bit) 649 ic->ic_flags_ext |= flag; 650 else 651 ic->ic_flags_ext &= ~flag; 652} 653 654void 655ieee80211_syncflag_ext(struct ieee80211vap *vap, int flag) 656{ 657 struct ieee80211com *ic = vap->iv_ic; 658 659 IEEE80211_LOCK(ic); 660 if (flag < 0) { 661 flag = -flag; 662 vap->iv_flags_ext &= ~flag; 663 } else 664 vap->iv_flags_ext |= flag; 665 ieee80211_syncflag_ext_locked(ic, flag); 666 IEEE80211_UNLOCK(ic); 667} 668 669static __inline int 670mapgsm(u_int freq, u_int flags) 671{ 672 freq *= 10; 673 if (flags & IEEE80211_CHAN_QUARTER) 674 freq += 5; 675 else if (flags & IEEE80211_CHAN_HALF) 676 freq += 10; 677 else 678 freq += 20; 679 /* NB: there is no 907/20 wide but leave room */ 680 return (freq - 906*10) / 5; 681} 682 683static __inline int 684mappsb(u_int freq, u_int flags) 685{ 686 return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5; 687} 688 689/* 690 * Convert MHz frequency to IEEE channel number. 691 */ 692int 693ieee80211_mhz2ieee(u_int freq, u_int flags) 694{ 695#define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990) 696 if (flags & IEEE80211_CHAN_GSM) 697 return mapgsm(freq, flags); 698 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 699 if (freq == 2484) 700 return 14; 701 if (freq < 2484) 702 return ((int) freq - 2407) / 5; 703 else 704 return 15 + ((freq - 2512) / 20); 705 } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */ 706 if (freq <= 5000) { 707 /* XXX check regdomain? */ 708 if (IS_FREQ_IN_PSB(freq)) 709 return mappsb(freq, flags); 710 return (freq - 4000) / 5; 711 } else 712 return (freq - 5000) / 5; 713 } else { /* either, guess */ 714 if (freq == 2484) 715 return 14; 716 if (freq < 2484) { 717 if (907 <= freq && freq <= 922) 718 return mapgsm(freq, flags); 719 return ((int) freq - 2407) / 5; 720 } 721 if (freq < 5000) { 722 if (IS_FREQ_IN_PSB(freq)) 723 return mappsb(freq, flags); 724 else if (freq > 4900) 725 return (freq - 4000) / 5; 726 else 727 return 15 + ((freq - 2512) / 20); 728 } 729 return (freq - 5000) / 5; 730 } 731#undef IS_FREQ_IN_PSB 732} 733 734/* 735 * Convert channel to IEEE channel number. 736 */ 737int 738ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c) 739{ 740 if (c == NULL) { 741 if_printf(ic->ic_ifp, "invalid channel (NULL)\n"); 742 return 0; /* XXX */ 743 } 744 return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee); 745} 746 747/* 748 * Convert IEEE channel number to MHz frequency. 749 */ 750u_int 751ieee80211_ieee2mhz(u_int chan, u_int flags) 752{ 753 if (flags & IEEE80211_CHAN_GSM) 754 return 907 + 5 * (chan / 10); 755 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 756 if (chan == 14) 757 return 2484; 758 if (chan < 14) 759 return 2407 + chan*5; 760 else 761 return 2512 + ((chan-15)*20); 762 } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */ 763 if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) { 764 chan -= 37; 765 return 4940 + chan*5 + (chan % 5 ? 2 : 0); 766 } 767 return 5000 + (chan*5); 768 } else { /* either, guess */ 769 /* XXX can't distinguish PSB+GSM channels */ 770 if (chan == 14) 771 return 2484; 772 if (chan < 14) /* 0-13 */ 773 return 2407 + chan*5; 774 if (chan < 27) /* 15-26 */ 775 return 2512 + ((chan-15)*20); 776 return 5000 + (chan*5); 777 } 778} 779 780/* 781 * Locate a channel given a frequency+flags. We cache 782 * the previous lookup to optimize switching between two 783 * channels--as happens with dynamic turbo. 784 */ 785struct ieee80211_channel * 786ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags) 787{ 788 struct ieee80211_channel *c; 789 int i; 790 791 flags &= IEEE80211_CHAN_ALLTURBO; 792 c = ic->ic_prevchan; 793 if (c != NULL && c->ic_freq == freq && 794 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 795 return c; 796 /* brute force search */ 797 for (i = 0; i < ic->ic_nchans; i++) { 798 c = &ic->ic_channels[i]; 799 if (c->ic_freq == freq && 800 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 801 return c; 802 } 803 return NULL; 804} 805 806/* 807 * Locate a channel given a channel number+flags. We cache 808 * the previous lookup to optimize switching between two 809 * channels--as happens with dynamic turbo. 810 */ 811struct ieee80211_channel * 812ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags) 813{ 814 struct ieee80211_channel *c; 815 int i; 816 817 flags &= IEEE80211_CHAN_ALLTURBO; 818 c = ic->ic_prevchan; 819 if (c != NULL && c->ic_ieee == ieee && 820 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 821 return c; 822 /* brute force search */ 823 for (i = 0; i < ic->ic_nchans; i++) { 824 c = &ic->ic_channels[i]; 825 if (c->ic_ieee == ieee && 826 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 827 return c; 828 } 829 return NULL; 830} 831 832static void 833addmedia(struct ifmedia *media, int caps, int addsta, int mode, int mword) 834{ 835#define ADD(_ic, _s, _o) \ 836 ifmedia_add(media, \ 837 IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL) 838 static const u_int mopts[IEEE80211_MODE_MAX] = { 839 IFM_AUTO, 840 IFM_IEEE80211_11A, 841 IFM_IEEE80211_11B, 842 IFM_IEEE80211_11G, 843 IFM_IEEE80211_FH, 844 IFM_IEEE80211_11A | IFM_IEEE80211_TURBO, 845 IFM_IEEE80211_11G | IFM_IEEE80211_TURBO, 846 IFM_IEEE80211_11A | IFM_IEEE80211_TURBO, 847 IFM_IEEE80211_11NA, 848 IFM_IEEE80211_11NG, 849 }; 850 u_int mopt; 851 852 mopt = mopts[mode]; 853 if (addsta) 854 ADD(ic, mword, mopt); /* STA mode has no cap */ 855 if (caps & IEEE80211_C_IBSS) 856 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC); 857 if (caps & IEEE80211_C_HOSTAP) 858 ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP); 859 if (caps & IEEE80211_C_AHDEMO) 860 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0); 861 if (caps & IEEE80211_C_MONITOR) 862 ADD(media, mword, mopt | IFM_IEEE80211_MONITOR); 863 if (caps & IEEE80211_C_WDS) 864 ADD(media, mword, mopt | IFM_IEEE80211_WDS); 865#undef ADD 866} 867 868/* 869 * Setup the media data structures according to the channel and 870 * rate tables. 871 */ 872static int 873ieee80211_media_setup(struct ieee80211com *ic, 874 struct ifmedia *media, int caps, int addsta, 875 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) 876{ 877 int i, j, mode, rate, maxrate, mword, r; 878 const struct ieee80211_rateset *rs; 879 struct ieee80211_rateset allrates; 880 881 /* 882 * Fill in media characteristics. 883 */ 884 ifmedia_init(media, 0, media_change, media_stat); 885 maxrate = 0; 886 /* 887 * Add media for legacy operating modes. 888 */ 889 memset(&allrates, 0, sizeof(allrates)); 890 for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) { 891 if (isclr(ic->ic_modecaps, mode)) 892 continue; 893 addmedia(media, caps, addsta, mode, IFM_AUTO); 894 if (mode == IEEE80211_MODE_AUTO) 895 continue; 896 rs = &ic->ic_sup_rates[mode]; 897 for (i = 0; i < rs->rs_nrates; i++) { 898 rate = rs->rs_rates[i]; 899 mword = ieee80211_rate2media(ic, rate, mode); 900 if (mword == 0) 901 continue; 902 addmedia(media, caps, addsta, mode, mword); 903 /* 904 * Add legacy rate to the collection of all rates. 905 */ 906 r = rate & IEEE80211_RATE_VAL; 907 for (j = 0; j < allrates.rs_nrates; j++) 908 if (allrates.rs_rates[j] == r) 909 break; 910 if (j == allrates.rs_nrates) { 911 /* unique, add to the set */ 912 allrates.rs_rates[j] = r; 913 allrates.rs_nrates++; 914 } 915 rate = (rate & IEEE80211_RATE_VAL) / 2; 916 if (rate > maxrate) 917 maxrate = rate; 918 } 919 } 920 for (i = 0; i < allrates.rs_nrates; i++) { 921 mword = ieee80211_rate2media(ic, allrates.rs_rates[i], 922 IEEE80211_MODE_AUTO); 923 if (mword == 0) 924 continue; 925 /* NB: remove media options from mword */ 926 addmedia(media, caps, addsta, 927 IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword)); 928 } 929 /* 930 * Add HT/11n media. Note that we do not have enough 931 * bits in the media subtype to express the MCS so we 932 * use a "placeholder" media subtype and any fixed MCS 933 * must be specified with a different mechanism. 934 */ 935 for (; mode < IEEE80211_MODE_MAX; mode++) { 936 if (isclr(ic->ic_modecaps, mode)) 937 continue; 938 addmedia(media, caps, addsta, mode, IFM_AUTO); 939 addmedia(media, caps, addsta, mode, IFM_IEEE80211_MCS); 940 } 941 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) || 942 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) { 943 addmedia(media, caps, addsta, 944 IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS); 945 /* XXX could walk htrates */ 946 /* XXX known array size */ 947 if (ieee80211_htrates[15].ht40_rate_400ns > maxrate) 948 maxrate = ieee80211_htrates[15].ht40_rate_400ns; 949 } 950 return maxrate; 951} 952 953void 954ieee80211_media_init(struct ieee80211com *ic) 955{ 956 struct ifnet *ifp = ic->ic_ifp; 957 int maxrate; 958 959 /* NB: this works because the structure is initialized to zero */ 960 if (!LIST_EMPTY(&ic->ic_media.ifm_list)) { 961 /* 962 * We are re-initializing the channel list; clear 963 * the existing media state as the media routines 964 * don't suppress duplicates. 965 */ 966 ifmedia_removeall(&ic->ic_media); 967 } 968 ieee80211_chan_init(ic); 969 970 /* 971 * Recalculate media settings in case new channel list changes 972 * the set of available modes. 973 */ 974 maxrate = ieee80211_media_setup(ic, &ic->ic_media, ic->ic_caps, 1, 975 ieee80211com_media_change, ieee80211com_media_status); 976 /* NB: strip explicit mode; we're actually in autoselect */ 977 ifmedia_set(&ic->ic_media, 978 media_status(ic->ic_opmode, ic->ic_curchan) &~ IFM_MMASK); 979 if (maxrate) 980 ifp->if_baudrate = IF_Mbps(maxrate); 981 982 /* XXX need to propagate new media settings to vap's */ 983} 984 985const struct ieee80211_rateset * 986ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c) 987{ 988 if (IEEE80211_IS_CHAN_HALF(c)) 989 return &ieee80211_rateset_half; 990 if (IEEE80211_IS_CHAN_QUARTER(c)) 991 return &ieee80211_rateset_quarter; 992 if (IEEE80211_IS_CHAN_HTA(c)) 993 return &ic->ic_sup_rates[IEEE80211_MODE_11A]; 994 if (IEEE80211_IS_CHAN_HTG(c)) { 995 /* XXX does this work for basic rates? */ 996 return &ic->ic_sup_rates[IEEE80211_MODE_11G]; 997 } 998 return &ic->ic_sup_rates[ieee80211_chan2mode(c)]; 999} 1000 1001void 1002ieee80211_announce(struct ieee80211com *ic) 1003{ 1004 struct ifnet *ifp = ic->ic_ifp; 1005 int i, mode, rate, mword; 1006 const struct ieee80211_rateset *rs; 1007 1008 /* NB: skip AUTO since it has no rates */ 1009 for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) { 1010 if (isclr(ic->ic_modecaps, mode)) 1011 continue; 1012 if_printf(ifp, "%s rates: ", ieee80211_phymode_name[mode]); 1013 rs = &ic->ic_sup_rates[mode]; 1014 for (i = 0; i < rs->rs_nrates; i++) { 1015 mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode); 1016 if (mword == 0) 1017 continue; 1018 rate = ieee80211_media2rate(mword); 1019 printf("%s%d%sMbps", (i != 0 ? " " : ""), 1020 rate / 2, ((rate & 0x1) != 0 ? ".5" : "")); 1021 } 1022 printf("\n"); 1023 } 1024 ieee80211_ht_announce(ic); 1025} 1026 1027void 1028ieee80211_announce_channels(struct ieee80211com *ic) 1029{ 1030 const struct ieee80211_channel *c; 1031 char type; 1032 int i, cw; 1033 1034 printf("Chan Freq CW RegPwr MinPwr MaxPwr\n"); 1035 for (i = 0; i < ic->ic_nchans; i++) { 1036 c = &ic->ic_channels[i]; 1037 if (IEEE80211_IS_CHAN_ST(c)) 1038 type = 'S'; 1039 else if (IEEE80211_IS_CHAN_108A(c)) 1040 type = 'T'; 1041 else if (IEEE80211_IS_CHAN_108G(c)) 1042 type = 'G'; 1043 else if (IEEE80211_IS_CHAN_HT(c)) 1044 type = 'n'; 1045 else if (IEEE80211_IS_CHAN_A(c)) 1046 type = 'a'; 1047 else if (IEEE80211_IS_CHAN_ANYG(c)) 1048 type = 'g'; 1049 else if (IEEE80211_IS_CHAN_B(c)) 1050 type = 'b'; 1051 else 1052 type = 'f'; 1053 if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c)) 1054 cw = 40; 1055 else if (IEEE80211_IS_CHAN_HALF(c)) 1056 cw = 10; 1057 else if (IEEE80211_IS_CHAN_QUARTER(c)) 1058 cw = 5; 1059 else 1060 cw = 20; 1061 printf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n" 1062 , c->ic_ieee, c->ic_freq, type 1063 , cw 1064 , IEEE80211_IS_CHAN_HT40U(c) ? '+' : 1065 IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' ' 1066 , c->ic_maxregpower 1067 , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0 1068 , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0 1069 ); 1070 } 1071} 1072 1073static int 1074media2mode(const struct ieee80211com *ic, 1075 const struct ifmedia_entry *ime, enum ieee80211_phymode *mode) 1076{ 1077 switch (IFM_MODE(ime->ifm_media)) { 1078 case IFM_IEEE80211_11A: 1079 *mode = IEEE80211_MODE_11A; 1080 break; 1081 case IFM_IEEE80211_11B: 1082 *mode = IEEE80211_MODE_11B; 1083 break; 1084 case IFM_IEEE80211_11G: 1085 *mode = IEEE80211_MODE_11G; 1086 break; 1087 case IFM_IEEE80211_FH: 1088 *mode = IEEE80211_MODE_FH; 1089 break; 1090 case IFM_IEEE80211_11NA: 1091 *mode = IEEE80211_MODE_11NA; 1092 break; 1093 case IFM_IEEE80211_11NG: 1094 *mode = IEEE80211_MODE_11NG; 1095 break; 1096 case IFM_AUTO: 1097 *mode = IEEE80211_MODE_AUTO; 1098 break; 1099 default: 1100 return 0; 1101 } 1102 /* 1103 * Turbo mode is an ``option''. 1104 * XXX does not apply to AUTO 1105 */ 1106 if (ime->ifm_media & IFM_IEEE80211_TURBO) { 1107 if (*mode == IEEE80211_MODE_11A) { 1108 if (ic->ic_flags & IEEE80211_F_TURBOP) 1109 *mode = IEEE80211_MODE_TURBO_A; 1110 else 1111 *mode = IEEE80211_MODE_STURBO_A; 1112 } else if (*mode == IEEE80211_MODE_11G) 1113 *mode = IEEE80211_MODE_TURBO_G; 1114 else 1115 return 0; 1116 } 1117 /* XXX HT40 +/- */ 1118 return 1; 1119} 1120 1121/* 1122 * Handle a media change request on the underlying 1123 * interface; we accept mode changes only. 1124 */ 1125int 1126ieee80211com_media_change(struct ifnet *ifp) 1127{ 1128 struct ieee80211com *ic = ifp->if_l2com; 1129 struct ifmedia_entry *ime = ic->ic_media.ifm_cur; 1130 enum ieee80211_phymode newphymode; 1131 int error = 0; 1132 1133 /* 1134 * First, identify the phy mode. 1135 */ 1136 if (!media2mode(ic, ime, &newphymode)) 1137 return EINVAL; 1138 /* NB: mode must be supported, no need to check */ 1139 1140 /* 1141 * Handle phy mode change. 1142 */ 1143 IEEE80211_LOCK(ic); 1144 if (ic->ic_curmode != newphymode) { /* change phy mode */ 1145 struct ieee80211vap *vap; 1146 1147 (void) ieee80211_setmode(ic, newphymode); 1148 /* 1149 * Propagate new state to each vap. 1150 */ 1151 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1152 } 1153 } 1154 IEEE80211_UNLOCK(ic); 1155 return error; 1156} 1157 1158static int 1159findrate(const struct ieee80211com *ic, enum ieee80211_phymode m, int r) 1160{ 1161 int i, nrates; 1162 1163 for (i = 0, nrates = ic->ic_sup_rates[m].rs_nrates; i < nrates; i++) 1164 if ((ic->ic_sup_rates[m].rs_rates[i] & IEEE80211_RATE_VAL) == r) 1165 return i; 1166 return -1; 1167} 1168 1169/* 1170 * Handle a media change request on the vap interface. 1171 */ 1172int 1173ieee80211_media_change(struct ifnet *ifp) 1174{ 1175 struct ieee80211vap *vap = ifp->if_softc; 1176 struct ifmedia_entry *ime = vap->iv_media.ifm_cur; 1177 struct ieee80211com *ic = vap->iv_ic; 1178 int newrate; 1179 1180 /* XXX this won't work unless ic_curmode is != IEEE80211_MODE_AUTO */ 1181 if (ic->ic_curmode == IEEE80211_MODE_AUTO) 1182 return EINVAL; 1183 if (IFM_SUBTYPE(ime->ifm_media) != IFM_AUTO) { 1184 /* 1185 * NB: this can only be used to specify a legacy rate. 1186 */ 1187 newrate = ieee80211_media2rate(ime->ifm_media); 1188 if (newrate == 0) 1189 return EINVAL; 1190 if (findrate(ic, ic->ic_curmode, newrate) == -1) 1191 return EINVAL; 1192 } else { 1193 newrate = IEEE80211_FIXED_RATE_NONE; 1194 } 1195 if (newrate != vap->iv_txparms[ic->ic_curmode].ucastrate) { 1196 vap->iv_txparms[ic->ic_curmode].ucastrate = newrate; 1197 return ENETRESET; 1198 } 1199 return 0; 1200} 1201 1202/* 1203 * Common code to calculate the media status word 1204 * from the operating mode and channel state. 1205 */ 1206static int 1207media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan) 1208{ 1209 int status; 1210 1211 status = IFM_IEEE80211; 1212 switch (opmode) { 1213 case IEEE80211_M_STA: 1214 break; 1215 case IEEE80211_M_IBSS: 1216 status |= IFM_IEEE80211_ADHOC; 1217 break; 1218 case IEEE80211_M_HOSTAP: 1219 status |= IFM_IEEE80211_HOSTAP; 1220 break; 1221 case IEEE80211_M_MONITOR: 1222 status |= IFM_IEEE80211_MONITOR; 1223 break; 1224 case IEEE80211_M_AHDEMO: 1225 status |= IFM_IEEE80211_ADHOC | IFM_FLAG0; 1226 break; 1227 case IEEE80211_M_WDS: 1228 status |= IFM_IEEE80211_WDS; 1229 break; 1230 } 1231 if (IEEE80211_IS_CHAN_HTA(chan)) { 1232 status |= IFM_IEEE80211_11NA; 1233 } else if (IEEE80211_IS_CHAN_HTG(chan)) { 1234 status |= IFM_IEEE80211_11NG; 1235 } else if (IEEE80211_IS_CHAN_A(chan)) { 1236 status |= IFM_IEEE80211_11A; 1237 } else if (IEEE80211_IS_CHAN_B(chan)) { 1238 status |= IFM_IEEE80211_11B; 1239 } else if (IEEE80211_IS_CHAN_ANYG(chan)) { 1240 status |= IFM_IEEE80211_11G; 1241 } else if (IEEE80211_IS_CHAN_FHSS(chan)) { 1242 status |= IFM_IEEE80211_FH; 1243 } 1244 /* XXX else complain? */ 1245 1246 if (IEEE80211_IS_CHAN_TURBO(chan)) 1247 status |= IFM_IEEE80211_TURBO; 1248#if 0 1249 if (IEEE80211_IS_CHAN_HT20(chan)) 1250 status |= IFM_IEEE80211_HT20; 1251 if (IEEE80211_IS_CHAN_HT40(chan)) 1252 status |= IFM_IEEE80211_HT40; 1253#endif 1254 return status; 1255} 1256 1257static void 1258ieee80211com_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1259{ 1260 struct ieee80211com *ic = ifp->if_l2com; 1261 struct ieee80211vap *vap; 1262 1263 imr->ifm_status = IFM_AVALID; 1264 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1265 if (vap->iv_ifp->if_flags & IFF_UP) { 1266 imr->ifm_status |= IFM_ACTIVE; 1267 break; 1268 } 1269 imr->ifm_active = media_status(ic->ic_opmode, ic->ic_curchan); 1270 if (imr->ifm_status & IFM_ACTIVE) 1271 imr->ifm_current = imr->ifm_active; 1272} 1273 1274void 1275ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1276{ 1277 struct ieee80211vap *vap = ifp->if_softc; 1278 struct ieee80211com *ic = vap->iv_ic; 1279 enum ieee80211_phymode mode; 1280 1281 imr->ifm_status = IFM_AVALID; 1282 /* 1283 * NB: use the current channel's mode to lock down a xmit 1284 * rate only when running; otherwise we may have a mismatch 1285 * in which case the rate will not be convertible. 1286 */ 1287 if (vap->iv_state == IEEE80211_S_RUN) { 1288 imr->ifm_status |= IFM_ACTIVE; 1289 mode = ieee80211_chan2mode(ic->ic_curchan); 1290 } else 1291 mode = IEEE80211_MODE_AUTO; 1292 imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan); 1293 /* 1294 * Calculate a current rate if possible. 1295 */ 1296 if (vap->iv_txparms[mode].ucastrate != IEEE80211_FIXED_RATE_NONE) { 1297 /* 1298 * A fixed rate is set, report that. 1299 */ 1300 imr->ifm_active |= ieee80211_rate2media(ic, 1301 vap->iv_txparms[mode].ucastrate, mode); 1302 } else if (vap->iv_opmode == IEEE80211_M_STA) { 1303 /* 1304 * In station mode report the current transmit rate. 1305 */ 1306 imr->ifm_active |= ieee80211_rate2media(ic, 1307 vap->iv_bss->ni_txrate, mode); 1308 } else 1309 imr->ifm_active |= IFM_AUTO; 1310 if (imr->ifm_status & IFM_ACTIVE) 1311 imr->ifm_current = imr->ifm_active; 1312} 1313 1314/* 1315 * Set the current phy mode and recalculate the active channel 1316 * set based on the available channels for this mode. Also 1317 * select a new default/current channel if the current one is 1318 * inappropriate for this mode. 1319 */ 1320int 1321ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode) 1322{ 1323 /* 1324 * Adjust basic rates in 11b/11g supported rate set. 1325 * Note that if operating on a hal/quarter rate channel 1326 * this is a noop as those rates sets are different 1327 * and used instead. 1328 */ 1329 if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B) 1330 ieee80211_setbasicrates(&ic->ic_sup_rates[mode], mode); 1331 1332 ic->ic_curmode = mode; 1333 ieee80211_reset_erp(ic); /* reset ERP state */ 1334 1335 return 0; 1336} 1337 1338/* 1339 * Return the phy mode for with the specified channel. 1340 */ 1341enum ieee80211_phymode 1342ieee80211_chan2mode(const struct ieee80211_channel *chan) 1343{ 1344 1345 if (IEEE80211_IS_CHAN_HTA(chan)) 1346 return IEEE80211_MODE_11NA; 1347 else if (IEEE80211_IS_CHAN_HTG(chan)) 1348 return IEEE80211_MODE_11NG; 1349 else if (IEEE80211_IS_CHAN_108G(chan)) 1350 return IEEE80211_MODE_TURBO_G; 1351 else if (IEEE80211_IS_CHAN_ST(chan)) 1352 return IEEE80211_MODE_STURBO_A; 1353 else if (IEEE80211_IS_CHAN_TURBO(chan)) 1354 return IEEE80211_MODE_TURBO_A; 1355 else if (IEEE80211_IS_CHAN_A(chan)) 1356 return IEEE80211_MODE_11A; 1357 else if (IEEE80211_IS_CHAN_ANYG(chan)) 1358 return IEEE80211_MODE_11G; 1359 else if (IEEE80211_IS_CHAN_B(chan)) 1360 return IEEE80211_MODE_11B; 1361 else if (IEEE80211_IS_CHAN_FHSS(chan)) 1362 return IEEE80211_MODE_FH; 1363 1364 /* NB: should not get here */ 1365 printf("%s: cannot map channel to mode; freq %u flags 0x%x\n", 1366 __func__, chan->ic_freq, chan->ic_flags); 1367 return IEEE80211_MODE_11B; 1368} 1369 1370struct ratemedia { 1371 u_int match; /* rate + mode */ 1372 u_int media; /* if_media rate */ 1373}; 1374 1375static int 1376findmedia(const struct ratemedia rates[], int n, u_int match) 1377{ 1378 int i; 1379 1380 for (i = 0; i < n; i++) 1381 if (rates[i].match == match) 1382 return rates[i].media; 1383 return IFM_AUTO; 1384} 1385 1386/* 1387 * Convert IEEE80211 rate value to ifmedia subtype. 1388 * Rate is either a legacy rate in units of 0.5Mbps 1389 * or an MCS index. 1390 */ 1391int 1392ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode) 1393{ 1394#define N(a) (sizeof(a) / sizeof(a[0])) 1395 static const struct ratemedia rates[] = { 1396 { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 }, 1397 { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 }, 1398 { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 }, 1399 { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 }, 1400 { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 }, 1401 { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 }, 1402 { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 }, 1403 { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 }, 1404 { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 }, 1405 { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 }, 1406 { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 }, 1407 { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 }, 1408 { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 }, 1409 { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 }, 1410 { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 }, 1411 { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 }, 1412 { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 }, 1413 { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 }, 1414 { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 }, 1415 { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 }, 1416 { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 }, 1417 { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 }, 1418 { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 }, 1419 { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 }, 1420 { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 }, 1421 { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 }, 1422 { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 }, 1423 { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 }, 1424 { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 }, 1425 { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 }, 1426 /* NB: OFDM72 doesn't realy exist so we don't handle it */ 1427 }; 1428 static const struct ratemedia htrates[] = { 1429 { 0, IFM_IEEE80211_MCS }, 1430 { 1, IFM_IEEE80211_MCS }, 1431 { 2, IFM_IEEE80211_MCS }, 1432 { 3, IFM_IEEE80211_MCS }, 1433 { 4, IFM_IEEE80211_MCS }, 1434 { 5, IFM_IEEE80211_MCS }, 1435 { 6, IFM_IEEE80211_MCS }, 1436 { 7, IFM_IEEE80211_MCS }, 1437 { 8, IFM_IEEE80211_MCS }, 1438 { 9, IFM_IEEE80211_MCS }, 1439 { 10, IFM_IEEE80211_MCS }, 1440 { 11, IFM_IEEE80211_MCS }, 1441 { 12, IFM_IEEE80211_MCS }, 1442 { 13, IFM_IEEE80211_MCS }, 1443 { 14, IFM_IEEE80211_MCS }, 1444 { 15, IFM_IEEE80211_MCS }, 1445 }; 1446 int m; 1447 1448 /* 1449 * Check 11n rates first for match as an MCS. 1450 */ 1451 if (mode == IEEE80211_MODE_11NA) { 1452 if (rate & IEEE80211_RATE_MCS) { 1453 rate &= ~IEEE80211_RATE_MCS; 1454 m = findmedia(htrates, N(htrates), rate); 1455 if (m != IFM_AUTO) 1456 return m | IFM_IEEE80211_11NA; 1457 } 1458 } else if (mode == IEEE80211_MODE_11NG) { 1459 /* NB: 12 is ambiguous, it will be treated as an MCS */ 1460 if (rate & IEEE80211_RATE_MCS) { 1461 rate &= ~IEEE80211_RATE_MCS; 1462 m = findmedia(htrates, N(htrates), rate); 1463 if (m != IFM_AUTO) 1464 return m | IFM_IEEE80211_11NG; 1465 } 1466 } 1467 rate &= IEEE80211_RATE_VAL; 1468 switch (mode) { 1469 case IEEE80211_MODE_11A: 1470 case IEEE80211_MODE_11NA: 1471 case IEEE80211_MODE_TURBO_A: 1472 case IEEE80211_MODE_STURBO_A: 1473 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11A); 1474 case IEEE80211_MODE_11B: 1475 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11B); 1476 case IEEE80211_MODE_FH: 1477 return findmedia(rates, N(rates), rate | IFM_IEEE80211_FH); 1478 case IEEE80211_MODE_AUTO: 1479 /* NB: ic may be NULL for some drivers */ 1480 if (ic && ic->ic_phytype == IEEE80211_T_FH) 1481 return findmedia(rates, N(rates), 1482 rate | IFM_IEEE80211_FH); 1483 /* NB: hack, 11g matches both 11b+11a rates */ 1484 /* fall thru... */ 1485 case IEEE80211_MODE_11G: 1486 case IEEE80211_MODE_11NG: 1487 case IEEE80211_MODE_TURBO_G: 1488 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11G); 1489 } 1490 return IFM_AUTO; 1491#undef N 1492} 1493 1494int 1495ieee80211_media2rate(int mword) 1496{ 1497#define N(a) (sizeof(a) / sizeof(a[0])) 1498 static const int ieeerates[] = { 1499 -1, /* IFM_AUTO */ 1500 0, /* IFM_MANUAL */ 1501 0, /* IFM_NONE */ 1502 2, /* IFM_IEEE80211_FH1 */ 1503 4, /* IFM_IEEE80211_FH2 */ 1504 2, /* IFM_IEEE80211_DS1 */ 1505 4, /* IFM_IEEE80211_DS2 */ 1506 11, /* IFM_IEEE80211_DS5 */ 1507 22, /* IFM_IEEE80211_DS11 */ 1508 44, /* IFM_IEEE80211_DS22 */ 1509 12, /* IFM_IEEE80211_OFDM6 */ 1510 18, /* IFM_IEEE80211_OFDM9 */ 1511 24, /* IFM_IEEE80211_OFDM12 */ 1512 36, /* IFM_IEEE80211_OFDM18 */ 1513 48, /* IFM_IEEE80211_OFDM24 */ 1514 72, /* IFM_IEEE80211_OFDM36 */ 1515 96, /* IFM_IEEE80211_OFDM48 */ 1516 108, /* IFM_IEEE80211_OFDM54 */ 1517 144, /* IFM_IEEE80211_OFDM72 */ 1518 0, /* IFM_IEEE80211_DS354k */ 1519 0, /* IFM_IEEE80211_DS512k */ 1520 6, /* IFM_IEEE80211_OFDM3 */ 1521 9, /* IFM_IEEE80211_OFDM4 */ 1522 54, /* IFM_IEEE80211_OFDM27 */ 1523 -1, /* IFM_IEEE80211_MCS */ 1524 }; 1525 return IFM_SUBTYPE(mword) < N(ieeerates) ? 1526 ieeerates[IFM_SUBTYPE(mword)] : 0; 1527#undef N 1528} 1529