ieee80211.c revision 195379
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 195379 2009-07-05 18:17:37Z sam $"); 29 30/* 31 * IEEE 802.11 generic handler 32 */ 33#include "opt_wlan.h" 34 35#include <sys/param.h> 36#include <sys/systm.h> 37#include <sys/kernel.h> 38 39#include <sys/socket.h> 40 41#include <net/if.h> 42#include <net/if_dl.h> 43#include <net/if_media.h> 44#include <net/if_types.h> 45#include <net/ethernet.h> 46 47#include <net80211/ieee80211_var.h> 48#include <net80211/ieee80211_regdomain.h> 49#ifdef IEEE80211_SUPPORT_SUPERG 50#include <net80211/ieee80211_superg.h> 51#endif 52 53#include <net/bpf.h> 54 55const char *ieee80211_phymode_name[IEEE80211_MODE_MAX] = { 56 [IEEE80211_MODE_AUTO] = "auto", 57 [IEEE80211_MODE_11A] = "11a", 58 [IEEE80211_MODE_11B] = "11b", 59 [IEEE80211_MODE_11G] = "11g", 60 [IEEE80211_MODE_FH] = "FH", 61 [IEEE80211_MODE_TURBO_A] = "turboA", 62 [IEEE80211_MODE_TURBO_G] = "turboG", 63 [IEEE80211_MODE_STURBO_A] = "sturboA", 64 [IEEE80211_MODE_HALF] = "half", 65 [IEEE80211_MODE_QUARTER] = "quarter", 66 [IEEE80211_MODE_11NA] = "11na", 67 [IEEE80211_MODE_11NG] = "11ng", 68}; 69/* map ieee80211_opmode to the corresponding capability bit */ 70const int ieee80211_opcap[IEEE80211_OPMODE_MAX] = { 71 [IEEE80211_M_IBSS] = IEEE80211_C_IBSS, 72 [IEEE80211_M_WDS] = IEEE80211_C_WDS, 73 [IEEE80211_M_STA] = IEEE80211_C_STA, 74 [IEEE80211_M_AHDEMO] = IEEE80211_C_AHDEMO, 75 [IEEE80211_M_HOSTAP] = IEEE80211_C_HOSTAP, 76 [IEEE80211_M_MONITOR] = IEEE80211_C_MONITOR, 77}; 78 79static const uint8_t ieee80211broadcastaddr[IEEE80211_ADDR_LEN] = 80 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 81 82static void ieee80211_syncflag_locked(struct ieee80211com *ic, int flag); 83static void ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag); 84static void ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag); 85static int ieee80211_media_setup(struct ieee80211com *ic, 86 struct ifmedia *media, int caps, int addsta, 87 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat); 88static void ieee80211com_media_status(struct ifnet *, struct ifmediareq *); 89static int ieee80211com_media_change(struct ifnet *); 90static int media_status(enum ieee80211_opmode, 91 const struct ieee80211_channel *); 92 93MALLOC_DEFINE(M_80211_VAP, "80211vap", "802.11 vap state"); 94 95/* 96 * Default supported rates for 802.11 operation (in IEEE .5Mb units). 97 */ 98#define B(r) ((r) | IEEE80211_RATE_BASIC) 99static const struct ieee80211_rateset ieee80211_rateset_11a = 100 { 8, { B(12), 18, B(24), 36, B(48), 72, 96, 108 } }; 101static const struct ieee80211_rateset ieee80211_rateset_half = 102 { 8, { B(6), 9, B(12), 18, B(24), 36, 48, 54 } }; 103static const struct ieee80211_rateset ieee80211_rateset_quarter = 104 { 8, { B(3), 4, B(6), 9, B(12), 18, 24, 27 } }; 105static const struct ieee80211_rateset ieee80211_rateset_11b = 106 { 4, { B(2), B(4), B(11), B(22) } }; 107/* NB: OFDM rates are handled specially based on mode */ 108static const struct ieee80211_rateset ieee80211_rateset_11g = 109 { 12, { B(2), B(4), B(11), B(22), 12, 18, 24, 36, 48, 72, 96, 108 } }; 110#undef B 111 112/* 113 * Fill in 802.11 available channel set, mark 114 * all available channels as active, and pick 115 * a default channel if not already specified. 116 */ 117static void 118ieee80211_chan_init(struct ieee80211com *ic) 119{ 120#define DEFAULTRATES(m, def) do { \ 121 if (ic->ic_sup_rates[m].rs_nrates == 0) \ 122 ic->ic_sup_rates[m] = def; \ 123} while (0) 124 struct ieee80211_channel *c; 125 int i; 126 127 KASSERT(0 < ic->ic_nchans && ic->ic_nchans <= IEEE80211_CHAN_MAX, 128 ("invalid number of channels specified: %u", ic->ic_nchans)); 129 memset(ic->ic_chan_avail, 0, sizeof(ic->ic_chan_avail)); 130 memset(ic->ic_modecaps, 0, sizeof(ic->ic_modecaps)); 131 setbit(ic->ic_modecaps, IEEE80211_MODE_AUTO); 132 for (i = 0; i < ic->ic_nchans; i++) { 133 c = &ic->ic_channels[i]; 134 KASSERT(c->ic_flags != 0, ("channel with no flags")); 135 /* 136 * Help drivers that work only with frequencies by filling 137 * in IEEE channel #'s if not already calculated. Note this 138 * mimics similar work done in ieee80211_setregdomain when 139 * changing regulatory state. 140 */ 141 if (c->ic_ieee == 0) 142 c->ic_ieee = ieee80211_mhz2ieee(c->ic_freq,c->ic_flags); 143 if (IEEE80211_IS_CHAN_HT40(c) && c->ic_extieee == 0) 144 c->ic_extieee = ieee80211_mhz2ieee(c->ic_freq + 145 (IEEE80211_IS_CHAN_HT40U(c) ? 20 : -20), 146 c->ic_flags); 147 /* default max tx power to max regulatory */ 148 if (c->ic_maxpower == 0) 149 c->ic_maxpower = 2*c->ic_maxregpower; 150 setbit(ic->ic_chan_avail, c->ic_ieee); 151 /* 152 * Identify mode capabilities. 153 */ 154 if (IEEE80211_IS_CHAN_A(c)) 155 setbit(ic->ic_modecaps, IEEE80211_MODE_11A); 156 if (IEEE80211_IS_CHAN_B(c)) 157 setbit(ic->ic_modecaps, IEEE80211_MODE_11B); 158 if (IEEE80211_IS_CHAN_ANYG(c)) 159 setbit(ic->ic_modecaps, IEEE80211_MODE_11G); 160 if (IEEE80211_IS_CHAN_FHSS(c)) 161 setbit(ic->ic_modecaps, IEEE80211_MODE_FH); 162 if (IEEE80211_IS_CHAN_108A(c)) 163 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_A); 164 if (IEEE80211_IS_CHAN_108G(c)) 165 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_G); 166 if (IEEE80211_IS_CHAN_ST(c)) 167 setbit(ic->ic_modecaps, IEEE80211_MODE_STURBO_A); 168 if (IEEE80211_IS_CHAN_HALF(c)) 169 setbit(ic->ic_modecaps, IEEE80211_MODE_HALF); 170 if (IEEE80211_IS_CHAN_QUARTER(c)) 171 setbit(ic->ic_modecaps, IEEE80211_MODE_QUARTER); 172 if (IEEE80211_IS_CHAN_HTA(c)) 173 setbit(ic->ic_modecaps, IEEE80211_MODE_11NA); 174 if (IEEE80211_IS_CHAN_HTG(c)) 175 setbit(ic->ic_modecaps, IEEE80211_MODE_11NG); 176 } 177 /* initialize candidate channels to all available */ 178 memcpy(ic->ic_chan_active, ic->ic_chan_avail, 179 sizeof(ic->ic_chan_avail)); 180 181 /* sort channel table to allow lookup optimizations */ 182 ieee80211_sort_channels(ic->ic_channels, ic->ic_nchans); 183 184 /* invalidate any previous state */ 185 ic->ic_bsschan = IEEE80211_CHAN_ANYC; 186 ic->ic_prevchan = NULL; 187 ic->ic_csa_newchan = NULL; 188 /* arbitrarily pick the first channel */ 189 ic->ic_curchan = &ic->ic_channels[0]; 190 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 191 192 /* fillin well-known rate sets if driver has not specified */ 193 DEFAULTRATES(IEEE80211_MODE_11B, ieee80211_rateset_11b); 194 DEFAULTRATES(IEEE80211_MODE_11G, ieee80211_rateset_11g); 195 DEFAULTRATES(IEEE80211_MODE_11A, ieee80211_rateset_11a); 196 DEFAULTRATES(IEEE80211_MODE_TURBO_A, ieee80211_rateset_11a); 197 DEFAULTRATES(IEEE80211_MODE_TURBO_G, ieee80211_rateset_11g); 198 DEFAULTRATES(IEEE80211_MODE_STURBO_A, ieee80211_rateset_11a); 199 DEFAULTRATES(IEEE80211_MODE_HALF, ieee80211_rateset_half); 200 DEFAULTRATES(IEEE80211_MODE_QUARTER, ieee80211_rateset_quarter); 201 DEFAULTRATES(IEEE80211_MODE_11NA, ieee80211_rateset_11a); 202 DEFAULTRATES(IEEE80211_MODE_11NG, ieee80211_rateset_11g); 203 204 /* 205 * Set auto mode to reset active channel state and any desired channel. 206 */ 207 (void) ieee80211_setmode(ic, IEEE80211_MODE_AUTO); 208#undef DEFAULTRATES 209} 210 211static void 212null_update_mcast(struct ifnet *ifp) 213{ 214 if_printf(ifp, "need multicast update callback\n"); 215} 216 217static void 218null_update_promisc(struct ifnet *ifp) 219{ 220 if_printf(ifp, "need promiscuous mode update callback\n"); 221} 222 223static int 224null_output(struct ifnet *ifp, struct mbuf *m, 225 struct sockaddr *dst, struct route *ro) 226{ 227 if_printf(ifp, "discard raw packet\n"); 228 m_freem(m); 229 return EIO; 230} 231 232static void 233null_input(struct ifnet *ifp, struct mbuf *m) 234{ 235 if_printf(ifp, "if_input should not be called\n"); 236 m_freem(m); 237} 238 239/* 240 * Attach/setup the common net80211 state. Called by 241 * the driver on attach to prior to creating any vap's. 242 */ 243void 244ieee80211_ifattach(struct ieee80211com *ic, 245 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 246{ 247 struct ifnet *ifp = ic->ic_ifp; 248 struct sockaddr_dl *sdl; 249 struct ifaddr *ifa; 250 251 KASSERT(ifp->if_type == IFT_IEEE80211, ("if_type %d", ifp->if_type)); 252 253 IEEE80211_LOCK_INIT(ic, ifp->if_xname); 254 TAILQ_INIT(&ic->ic_vaps); 255 256 /* Create a taskqueue for all state changes */ 257 ic->ic_tq = taskqueue_create("ic_taskq", M_WAITOK | M_ZERO, 258 taskqueue_thread_enqueue, &ic->ic_tq); 259 taskqueue_start_threads(&ic->ic_tq, 1, PI_NET, "%s taskq", 260 ifp->if_xname); 261 /* 262 * Fill in 802.11 available channel set, mark all 263 * available channels as active, and pick a default 264 * channel if not already specified. 265 */ 266 ieee80211_media_init(ic); 267 268 ic->ic_update_mcast = null_update_mcast; 269 ic->ic_update_promisc = null_update_promisc; 270 271 ic->ic_hash_key = arc4random(); 272 ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT; 273 ic->ic_lintval = ic->ic_bintval; 274 ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX; 275 276 ieee80211_crypto_attach(ic); 277 ieee80211_node_attach(ic); 278 ieee80211_power_attach(ic); 279 ieee80211_proto_attach(ic); 280#ifdef IEEE80211_SUPPORT_SUPERG 281 ieee80211_superg_attach(ic); 282#endif 283 ieee80211_ht_attach(ic); 284 ieee80211_scan_attach(ic); 285 ieee80211_regdomain_attach(ic); 286 ieee80211_dfs_attach(ic); 287 288 ieee80211_sysctl_attach(ic); 289 290 ifp->if_addrlen = IEEE80211_ADDR_LEN; 291 ifp->if_hdrlen = 0; 292 if_attach(ifp); 293 ifp->if_mtu = IEEE80211_MTU_MAX; 294 ifp->if_broadcastaddr = ieee80211broadcastaddr; 295 ifp->if_output = null_output; 296 ifp->if_input = null_input; /* just in case */ 297 ifp->if_resolvemulti = NULL; /* NB: callers check */ 298 299 ifa = ifaddr_byindex(ifp->if_index); 300 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); 301 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 302 sdl->sdl_type = IFT_ETHER; /* XXX IFT_IEEE80211? */ 303 sdl->sdl_alen = IEEE80211_ADDR_LEN; 304 IEEE80211_ADDR_COPY(LLADDR(sdl), macaddr); 305 ifa_free(ifa); 306} 307 308/* 309 * Detach net80211 state on device detach. Tear down 310 * all vap's and reclaim all common state prior to the 311 * device state going away. Note we may call back into 312 * driver; it must be prepared for this. 313 */ 314void 315ieee80211_ifdetach(struct ieee80211com *ic) 316{ 317 struct ifnet *ifp = ic->ic_ifp; 318 struct ieee80211vap *vap; 319 320 if_detach(ifp); 321 322 while ((vap = TAILQ_FIRST(&ic->ic_vaps)) != NULL) 323 ieee80211_vap_destroy(vap); 324 ieee80211_waitfor_parent(ic); 325 326 ieee80211_sysctl_detach(ic); 327 ieee80211_dfs_detach(ic); 328 ieee80211_regdomain_detach(ic); 329 ieee80211_scan_detach(ic); 330#ifdef IEEE80211_SUPPORT_SUPERG 331 ieee80211_superg_detach(ic); 332#endif 333 ieee80211_ht_detach(ic); 334 /* NB: must be called before ieee80211_node_detach */ 335 ieee80211_proto_detach(ic); 336 ieee80211_crypto_detach(ic); 337 ieee80211_power_detach(ic); 338 ieee80211_node_detach(ic); 339 340 ifmedia_removeall(&ic->ic_media); 341 taskqueue_free(ic->ic_tq); 342 IEEE80211_LOCK_DESTROY(ic); 343} 344 345/* 346 * Default reset method for use with the ioctl support. This 347 * method is invoked after any state change in the 802.11 348 * layer that should be propagated to the hardware but not 349 * require re-initialization of the 802.11 state machine (e.g 350 * rescanning for an ap). We always return ENETRESET which 351 * should cause the driver to re-initialize the device. Drivers 352 * can override this method to implement more optimized support. 353 */ 354static int 355default_reset(struct ieee80211vap *vap, u_long cmd) 356{ 357 return ENETRESET; 358} 359 360/* 361 * Prepare a vap for use. Drivers use this call to 362 * setup net80211 state in new vap's prior attaching 363 * them with ieee80211_vap_attach (below). 364 */ 365int 366ieee80211_vap_setup(struct ieee80211com *ic, struct ieee80211vap *vap, 367 const char name[IFNAMSIZ], int unit, int opmode, int flags, 368 const uint8_t bssid[IEEE80211_ADDR_LEN], 369 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 370{ 371 struct ifnet *ifp; 372 373 ifp = if_alloc(IFT_ETHER); 374 if (ifp == NULL) { 375 if_printf(ic->ic_ifp, "%s: unable to allocate ifnet\n", 376 __func__); 377 return ENOMEM; 378 } 379 if_initname(ifp, name, unit); 380 ifp->if_softc = vap; /* back pointer */ 381 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 382 ifp->if_start = ieee80211_start; 383 ifp->if_ioctl = ieee80211_ioctl; 384 ifp->if_watchdog = NULL; /* NB: no watchdog routine */ 385 ifp->if_init = ieee80211_init; 386 /* NB: input+output filled in by ether_ifattach */ 387 IFQ_SET_MAXLEN(&ifp->if_snd, IFQ_MAXLEN); 388 ifp->if_snd.ifq_drv_maxlen = IFQ_MAXLEN; 389 IFQ_SET_READY(&ifp->if_snd); 390 391 vap->iv_ifp = ifp; 392 vap->iv_ic = ic; 393 vap->iv_flags = ic->ic_flags; /* propagate common flags */ 394 vap->iv_flags_ext = ic->ic_flags_ext; 395 vap->iv_flags_ven = ic->ic_flags_ven; 396 vap->iv_caps = ic->ic_caps &~ IEEE80211_C_OPMODE; 397 vap->iv_htcaps = ic->ic_htcaps; 398 vap->iv_opmode = opmode; 399 vap->iv_caps |= ieee80211_opcap[opmode]; 400 switch (opmode) { 401 case IEEE80211_M_WDS: 402 /* 403 * WDS links must specify the bssid of the far end. 404 * For legacy operation this is a static relationship. 405 * For non-legacy operation the station must associate 406 * and be authorized to pass traffic. Plumbing the 407 * vap to the proper node happens when the vap 408 * transitions to RUN state. 409 */ 410 IEEE80211_ADDR_COPY(vap->iv_des_bssid, bssid); 411 vap->iv_flags |= IEEE80211_F_DESBSSID; 412 if (flags & IEEE80211_CLONE_WDSLEGACY) 413 vap->iv_flags_ext |= IEEE80211_FEXT_WDSLEGACY; 414 break; 415#ifdef IEEE80211_SUPPORT_TDMA 416 case IEEE80211_M_AHDEMO: 417 if (flags & IEEE80211_CLONE_TDMA) { 418 /* NB: checked before clone operation allowed */ 419 KASSERT(ic->ic_caps & IEEE80211_C_TDMA, 420 ("not TDMA capable, ic_caps 0x%x", ic->ic_caps)); 421 /* 422 * Propagate TDMA capability to mark vap; this 423 * cannot be removed and is used to distinguish 424 * regular ahdemo operation from ahdemo+tdma. 425 */ 426 vap->iv_caps |= IEEE80211_C_TDMA; 427 } 428 break; 429#endif 430 } 431 /* auto-enable s/w beacon miss support */ 432 if (flags & IEEE80211_CLONE_NOBEACONS) 433 vap->iv_flags_ext |= IEEE80211_FEXT_SWBMISS; 434 /* 435 * Enable various functionality by default if we're 436 * capable; the driver can override us if it knows better. 437 */ 438 if (vap->iv_caps & IEEE80211_C_WME) 439 vap->iv_flags |= IEEE80211_F_WME; 440 if (vap->iv_caps & IEEE80211_C_BURST) 441 vap->iv_flags |= IEEE80211_F_BURST; 442 /* NB: bg scanning only makes sense for station mode right now */ 443 if (vap->iv_opmode == IEEE80211_M_STA && 444 (vap->iv_caps & IEEE80211_C_BGSCAN)) 445 vap->iv_flags |= IEEE80211_F_BGSCAN; 446 vap->iv_flags |= IEEE80211_F_DOTH; /* XXX no cap, just ena */ 447 /* NB: DFS support only makes sense for ap mode right now */ 448 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 449 (vap->iv_caps & IEEE80211_C_DFS)) 450 vap->iv_flags_ext |= IEEE80211_FEXT_DFS; 451 452 vap->iv_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */ 453 vap->iv_bmissthreshold = IEEE80211_HWBMISS_DEFAULT; 454 vap->iv_dtim_period = IEEE80211_DTIM_DEFAULT; 455 /* 456 * Install a default reset method for the ioctl support; 457 * the driver can override this. 458 */ 459 vap->iv_reset = default_reset; 460 461 IEEE80211_ADDR_COPY(vap->iv_myaddr, macaddr); 462 463 ieee80211_sysctl_vattach(vap); 464 ieee80211_crypto_vattach(vap); 465 ieee80211_node_vattach(vap); 466 ieee80211_power_vattach(vap); 467 ieee80211_proto_vattach(vap); 468#ifdef IEEE80211_SUPPORT_SUPERG 469 ieee80211_superg_vattach(vap); 470#endif 471 ieee80211_ht_vattach(vap); 472 ieee80211_scan_vattach(vap); 473 ieee80211_regdomain_vattach(vap); 474 ieee80211_radiotap_vattach(vap); 475 476 return 0; 477} 478 479/* 480 * Activate a vap. State should have been prepared with a 481 * call to ieee80211_vap_setup and by the driver. On return 482 * from this call the vap is ready for use. 483 */ 484int 485ieee80211_vap_attach(struct ieee80211vap *vap, 486 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) 487{ 488 struct ifnet *ifp = vap->iv_ifp; 489 struct ieee80211com *ic = vap->iv_ic; 490 struct ifmediareq imr; 491 int maxrate; 492 493 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 494 "%s: %s parent %s flags 0x%x flags_ext 0x%x\n", 495 __func__, ieee80211_opmode_name[vap->iv_opmode], 496 ic->ic_ifp->if_xname, vap->iv_flags, vap->iv_flags_ext); 497 498 /* 499 * Do late attach work that cannot happen until after 500 * the driver has had a chance to override defaults. 501 */ 502 ieee80211_node_latevattach(vap); 503 ieee80211_power_latevattach(vap); 504 505 maxrate = ieee80211_media_setup(ic, &vap->iv_media, vap->iv_caps, 506 vap->iv_opmode == IEEE80211_M_STA, media_change, media_stat); 507 ieee80211_media_status(ifp, &imr); 508 /* NB: strip explicit mode; we're actually in autoselect */ 509 ifmedia_set(&vap->iv_media, 510 imr.ifm_active &~ (IFM_MMASK | IFM_IEEE80211_TURBO)); 511 if (maxrate) 512 ifp->if_baudrate = IF_Mbps(maxrate); 513 514 ether_ifattach(ifp, vap->iv_myaddr); 515 /* hook output method setup by ether_ifattach */ 516 vap->iv_output = ifp->if_output; 517 ifp->if_output = ieee80211_output; 518 /* NB: if_mtu set by ether_ifattach to ETHERMTU */ 519 520 IEEE80211_LOCK(ic); 521 TAILQ_INSERT_TAIL(&ic->ic_vaps, vap, iv_next); 522 ieee80211_syncflag_locked(ic, IEEE80211_F_WME); 523#ifdef IEEE80211_SUPPORT_SUPERG 524 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); 525#endif 526 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); 527 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); 528 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT); 529 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40); 530 ieee80211_syncifflag_locked(ic, IFF_PROMISC); 531 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI); 532 IEEE80211_UNLOCK(ic); 533 534 return 1; 535} 536 537/* 538 * Tear down vap state and reclaim the ifnet. 539 * The driver is assumed to have prepared for 540 * this; e.g. by turning off interrupts for the 541 * underlying device. 542 */ 543void 544ieee80211_vap_detach(struct ieee80211vap *vap) 545{ 546 struct ieee80211com *ic = vap->iv_ic; 547 struct ifnet *ifp = vap->iv_ifp; 548 549 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s parent %s\n", 550 __func__, ieee80211_opmode_name[vap->iv_opmode], 551 ic->ic_ifp->if_xname); 552 553 /* NB: bpfdetach is called by ether_ifdetach and claims all taps */ 554 ether_ifdetach(ifp); 555 556 ieee80211_stop(vap); 557 558 /* 559 * Flush any deferred vap tasks. 560 * NB: must be before ether_ifdetach() and removal from ic_vaps list 561 */ 562 ieee80211_draintask(ic, &vap->iv_nstate_task); 563 ieee80211_draintask(ic, &vap->iv_swbmiss_task); 564 565 IEEE80211_LOCK(ic); 566 KASSERT(vap->iv_state == IEEE80211_S_INIT , ("vap still running")); 567 TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next); 568 ieee80211_syncflag_locked(ic, IEEE80211_F_WME); 569#ifdef IEEE80211_SUPPORT_SUPERG 570 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); 571#endif 572 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); 573 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); 574 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT); 575 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40); 576 /* NB: this handles the bpfdetach done below */ 577 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_BPF); 578 ieee80211_syncifflag_locked(ic, IFF_PROMISC); 579 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI); 580 IEEE80211_UNLOCK(ic); 581 582 ifmedia_removeall(&vap->iv_media); 583 584 ieee80211_radiotap_vdetach(vap); 585 ieee80211_regdomain_vdetach(vap); 586 ieee80211_scan_vdetach(vap); 587#ifdef IEEE80211_SUPPORT_SUPERG 588 ieee80211_superg_vdetach(vap); 589#endif 590 ieee80211_ht_vdetach(vap); 591 /* NB: must be before ieee80211_node_vdetach */ 592 ieee80211_proto_vdetach(vap); 593 ieee80211_crypto_vdetach(vap); 594 ieee80211_power_vdetach(vap); 595 ieee80211_node_vdetach(vap); 596 ieee80211_sysctl_vdetach(vap); 597 598 if_free(ifp); 599} 600 601/* 602 * Synchronize flag bit state in the parent ifnet structure 603 * according to the state of all vap ifnet's. This is used, 604 * for example, to handle IFF_PROMISC and IFF_ALLMULTI. 605 */ 606void 607ieee80211_syncifflag_locked(struct ieee80211com *ic, int flag) 608{ 609 struct ifnet *ifp = ic->ic_ifp; 610 struct ieee80211vap *vap; 611 int bit, oflags; 612 613 IEEE80211_LOCK_ASSERT(ic); 614 615 bit = 0; 616 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 617 if (vap->iv_ifp->if_flags & flag) { 618 /* 619 * XXX the bridge sets PROMISC but we don't want to 620 * enable it on the device, discard here so all the 621 * drivers don't need to special-case it 622 */ 623 if (flag == IFF_PROMISC && 624 vap->iv_opmode == IEEE80211_M_HOSTAP) 625 continue; 626 bit = 1; 627 break; 628 } 629 oflags = ifp->if_flags; 630 if (bit) 631 ifp->if_flags |= flag; 632 else 633 ifp->if_flags &= ~flag; 634 if ((ifp->if_flags ^ oflags) & flag) { 635 /* XXX should we return 1/0 and let caller do this? */ 636 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 637 if (flag == IFF_PROMISC) 638 ieee80211_runtask(ic, &ic->ic_promisc_task); 639 else if (flag == IFF_ALLMULTI) 640 ieee80211_runtask(ic, &ic->ic_mcast_task); 641 } 642 } 643} 644 645/* 646 * Synchronize flag bit state in the com structure 647 * according to the state of all vap's. This is used, 648 * for example, to handle state changes via ioctls. 649 */ 650static void 651ieee80211_syncflag_locked(struct ieee80211com *ic, int flag) 652{ 653 struct ieee80211vap *vap; 654 int bit; 655 656 IEEE80211_LOCK_ASSERT(ic); 657 658 bit = 0; 659 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 660 if (vap->iv_flags & flag) { 661 bit = 1; 662 break; 663 } 664 if (bit) 665 ic->ic_flags |= flag; 666 else 667 ic->ic_flags &= ~flag; 668} 669 670void 671ieee80211_syncflag(struct ieee80211vap *vap, int flag) 672{ 673 struct ieee80211com *ic = vap->iv_ic; 674 675 IEEE80211_LOCK(ic); 676 if (flag < 0) { 677 flag = -flag; 678 vap->iv_flags &= ~flag; 679 } else 680 vap->iv_flags |= flag; 681 ieee80211_syncflag_locked(ic, flag); 682 IEEE80211_UNLOCK(ic); 683} 684 685/* 686 * Synchronize flags_ht bit state in the com structure 687 * according to the state of all vap's. This is used, 688 * for example, to handle state changes via ioctls. 689 */ 690static void 691ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag) 692{ 693 struct ieee80211vap *vap; 694 int bit; 695 696 IEEE80211_LOCK_ASSERT(ic); 697 698 bit = 0; 699 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 700 if (vap->iv_flags_ht & flag) { 701 bit = 1; 702 break; 703 } 704 if (bit) 705 ic->ic_flags_ht |= flag; 706 else 707 ic->ic_flags_ht &= ~flag; 708} 709 710void 711ieee80211_syncflag_ht(struct ieee80211vap *vap, int flag) 712{ 713 struct ieee80211com *ic = vap->iv_ic; 714 715 IEEE80211_LOCK(ic); 716 if (flag < 0) { 717 flag = -flag; 718 vap->iv_flags_ht &= ~flag; 719 } else 720 vap->iv_flags_ht |= flag; 721 ieee80211_syncflag_ht_locked(ic, flag); 722 IEEE80211_UNLOCK(ic); 723} 724 725/* 726 * Synchronize flags_ext bit state in the com structure 727 * according to the state of all vap's. This is used, 728 * for example, to handle state changes via ioctls. 729 */ 730static void 731ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag) 732{ 733 struct ieee80211vap *vap; 734 int bit; 735 736 IEEE80211_LOCK_ASSERT(ic); 737 738 bit = 0; 739 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 740 if (vap->iv_flags_ext & flag) { 741 bit = 1; 742 break; 743 } 744 if (bit) 745 ic->ic_flags_ext |= flag; 746 else 747 ic->ic_flags_ext &= ~flag; 748} 749 750void 751ieee80211_syncflag_ext(struct ieee80211vap *vap, int flag) 752{ 753 struct ieee80211com *ic = vap->iv_ic; 754 755 IEEE80211_LOCK(ic); 756 if (flag < 0) { 757 flag = -flag; 758 vap->iv_flags_ext &= ~flag; 759 } else 760 vap->iv_flags_ext |= flag; 761 ieee80211_syncflag_ext_locked(ic, flag); 762 IEEE80211_UNLOCK(ic); 763} 764 765static __inline int 766mapgsm(u_int freq, u_int flags) 767{ 768 freq *= 10; 769 if (flags & IEEE80211_CHAN_QUARTER) 770 freq += 5; 771 else if (flags & IEEE80211_CHAN_HALF) 772 freq += 10; 773 else 774 freq += 20; 775 /* NB: there is no 907/20 wide but leave room */ 776 return (freq - 906*10) / 5; 777} 778 779static __inline int 780mappsb(u_int freq, u_int flags) 781{ 782 return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5; 783} 784 785/* 786 * Convert MHz frequency to IEEE channel number. 787 */ 788int 789ieee80211_mhz2ieee(u_int freq, u_int flags) 790{ 791#define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990) 792 if (flags & IEEE80211_CHAN_GSM) 793 return mapgsm(freq, flags); 794 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 795 if (freq == 2484) 796 return 14; 797 if (freq < 2484) 798 return ((int) freq - 2407) / 5; 799 else 800 return 15 + ((freq - 2512) / 20); 801 } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */ 802 if (freq <= 5000) { 803 /* XXX check regdomain? */ 804 if (IS_FREQ_IN_PSB(freq)) 805 return mappsb(freq, flags); 806 return (freq - 4000) / 5; 807 } else 808 return (freq - 5000) / 5; 809 } else { /* either, guess */ 810 if (freq == 2484) 811 return 14; 812 if (freq < 2484) { 813 if (907 <= freq && freq <= 922) 814 return mapgsm(freq, flags); 815 return ((int) freq - 2407) / 5; 816 } 817 if (freq < 5000) { 818 if (IS_FREQ_IN_PSB(freq)) 819 return mappsb(freq, flags); 820 else if (freq > 4900) 821 return (freq - 4000) / 5; 822 else 823 return 15 + ((freq - 2512) / 20); 824 } 825 return (freq - 5000) / 5; 826 } 827#undef IS_FREQ_IN_PSB 828} 829 830/* 831 * Convert channel to IEEE channel number. 832 */ 833int 834ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c) 835{ 836 if (c == NULL) { 837 if_printf(ic->ic_ifp, "invalid channel (NULL)\n"); 838 return 0; /* XXX */ 839 } 840 return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee); 841} 842 843/* 844 * Convert IEEE channel number to MHz frequency. 845 */ 846u_int 847ieee80211_ieee2mhz(u_int chan, u_int flags) 848{ 849 if (flags & IEEE80211_CHAN_GSM) 850 return 907 + 5 * (chan / 10); 851 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 852 if (chan == 14) 853 return 2484; 854 if (chan < 14) 855 return 2407 + chan*5; 856 else 857 return 2512 + ((chan-15)*20); 858 } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */ 859 if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) { 860 chan -= 37; 861 return 4940 + chan*5 + (chan % 5 ? 2 : 0); 862 } 863 return 5000 + (chan*5); 864 } else { /* either, guess */ 865 /* XXX can't distinguish PSB+GSM channels */ 866 if (chan == 14) 867 return 2484; 868 if (chan < 14) /* 0-13 */ 869 return 2407 + chan*5; 870 if (chan < 27) /* 15-26 */ 871 return 2512 + ((chan-15)*20); 872 return 5000 + (chan*5); 873 } 874} 875 876/* 877 * Locate a channel given a frequency+flags. We cache 878 * the previous lookup to optimize switching between two 879 * channels--as happens with dynamic turbo. 880 */ 881struct ieee80211_channel * 882ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags) 883{ 884 struct ieee80211_channel *c; 885 int i; 886 887 flags &= IEEE80211_CHAN_ALLTURBO; 888 c = ic->ic_prevchan; 889 if (c != NULL && c->ic_freq == freq && 890 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 891 return c; 892 /* brute force search */ 893 for (i = 0; i < ic->ic_nchans; i++) { 894 c = &ic->ic_channels[i]; 895 if (c->ic_freq == freq && 896 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 897 return c; 898 } 899 return NULL; 900} 901 902/* 903 * Locate a channel given a channel number+flags. We cache 904 * the previous lookup to optimize switching between two 905 * channels--as happens with dynamic turbo. 906 */ 907struct ieee80211_channel * 908ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags) 909{ 910 struct ieee80211_channel *c; 911 int i; 912 913 flags &= IEEE80211_CHAN_ALLTURBO; 914 c = ic->ic_prevchan; 915 if (c != NULL && c->ic_ieee == ieee && 916 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 917 return c; 918 /* brute force search */ 919 for (i = 0; i < ic->ic_nchans; i++) { 920 c = &ic->ic_channels[i]; 921 if (c->ic_ieee == ieee && 922 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 923 return c; 924 } 925 return NULL; 926} 927 928static void 929addmedia(struct ifmedia *media, int caps, int addsta, int mode, int mword) 930{ 931#define ADD(_ic, _s, _o) \ 932 ifmedia_add(media, \ 933 IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL) 934 static const u_int mopts[IEEE80211_MODE_MAX] = { 935 [IEEE80211_MODE_AUTO] = IFM_AUTO, 936 [IEEE80211_MODE_11A] = IFM_IEEE80211_11A, 937 [IEEE80211_MODE_11B] = IFM_IEEE80211_11B, 938 [IEEE80211_MODE_11G] = IFM_IEEE80211_11G, 939 [IEEE80211_MODE_FH] = IFM_IEEE80211_FH, 940 [IEEE80211_MODE_TURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO, 941 [IEEE80211_MODE_TURBO_G] = IFM_IEEE80211_11G|IFM_IEEE80211_TURBO, 942 [IEEE80211_MODE_STURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO, 943 [IEEE80211_MODE_HALF] = IFM_IEEE80211_11A, /* XXX */ 944 [IEEE80211_MODE_QUARTER] = IFM_IEEE80211_11A, /* XXX */ 945 [IEEE80211_MODE_11NA] = IFM_IEEE80211_11NA, 946 [IEEE80211_MODE_11NG] = IFM_IEEE80211_11NG, 947 }; 948 u_int mopt; 949 950 mopt = mopts[mode]; 951 if (addsta) 952 ADD(ic, mword, mopt); /* STA mode has no cap */ 953 if (caps & IEEE80211_C_IBSS) 954 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC); 955 if (caps & IEEE80211_C_HOSTAP) 956 ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP); 957 if (caps & IEEE80211_C_AHDEMO) 958 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0); 959 if (caps & IEEE80211_C_MONITOR) 960 ADD(media, mword, mopt | IFM_IEEE80211_MONITOR); 961 if (caps & IEEE80211_C_WDS) 962 ADD(media, mword, mopt | IFM_IEEE80211_WDS); 963#undef ADD 964} 965 966/* 967 * Setup the media data structures according to the channel and 968 * rate tables. 969 */ 970static int 971ieee80211_media_setup(struct ieee80211com *ic, 972 struct ifmedia *media, int caps, int addsta, 973 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) 974{ 975 int i, j, mode, rate, maxrate, mword, r; 976 const struct ieee80211_rateset *rs; 977 struct ieee80211_rateset allrates; 978 979 /* 980 * Fill in media characteristics. 981 */ 982 ifmedia_init(media, 0, media_change, media_stat); 983 maxrate = 0; 984 /* 985 * Add media for legacy operating modes. 986 */ 987 memset(&allrates, 0, sizeof(allrates)); 988 for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) { 989 if (isclr(ic->ic_modecaps, mode)) 990 continue; 991 addmedia(media, caps, addsta, mode, IFM_AUTO); 992 if (mode == IEEE80211_MODE_AUTO) 993 continue; 994 rs = &ic->ic_sup_rates[mode]; 995 for (i = 0; i < rs->rs_nrates; i++) { 996 rate = rs->rs_rates[i]; 997 mword = ieee80211_rate2media(ic, rate, mode); 998 if (mword == 0) 999 continue; 1000 addmedia(media, caps, addsta, mode, mword); 1001 /* 1002 * Add legacy rate to the collection of all rates. 1003 */ 1004 r = rate & IEEE80211_RATE_VAL; 1005 for (j = 0; j < allrates.rs_nrates; j++) 1006 if (allrates.rs_rates[j] == r) 1007 break; 1008 if (j == allrates.rs_nrates) { 1009 /* unique, add to the set */ 1010 allrates.rs_rates[j] = r; 1011 allrates.rs_nrates++; 1012 } 1013 rate = (rate & IEEE80211_RATE_VAL) / 2; 1014 if (rate > maxrate) 1015 maxrate = rate; 1016 } 1017 } 1018 for (i = 0; i < allrates.rs_nrates; i++) { 1019 mword = ieee80211_rate2media(ic, allrates.rs_rates[i], 1020 IEEE80211_MODE_AUTO); 1021 if (mword == 0) 1022 continue; 1023 /* NB: remove media options from mword */ 1024 addmedia(media, caps, addsta, 1025 IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword)); 1026 } 1027 /* 1028 * Add HT/11n media. Note that we do not have enough 1029 * bits in the media subtype to express the MCS so we 1030 * use a "placeholder" media subtype and any fixed MCS 1031 * must be specified with a different mechanism. 1032 */ 1033 for (; mode <= IEEE80211_MODE_11NG; mode++) { 1034 if (isclr(ic->ic_modecaps, mode)) 1035 continue; 1036 addmedia(media, caps, addsta, mode, IFM_AUTO); 1037 addmedia(media, caps, addsta, mode, IFM_IEEE80211_MCS); 1038 } 1039 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) || 1040 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) { 1041 addmedia(media, caps, addsta, 1042 IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS); 1043 /* XXX could walk htrates */ 1044 /* XXX known array size */ 1045 if (ieee80211_htrates[15].ht40_rate_400ns > maxrate) 1046 maxrate = ieee80211_htrates[15].ht40_rate_400ns; 1047 } 1048 return maxrate; 1049} 1050 1051void 1052ieee80211_media_init(struct ieee80211com *ic) 1053{ 1054 struct ifnet *ifp = ic->ic_ifp; 1055 int maxrate; 1056 1057 /* NB: this works because the structure is initialized to zero */ 1058 if (!LIST_EMPTY(&ic->ic_media.ifm_list)) { 1059 /* 1060 * We are re-initializing the channel list; clear 1061 * the existing media state as the media routines 1062 * don't suppress duplicates. 1063 */ 1064 ifmedia_removeall(&ic->ic_media); 1065 } 1066 ieee80211_chan_init(ic); 1067 1068 /* 1069 * Recalculate media settings in case new channel list changes 1070 * the set of available modes. 1071 */ 1072 maxrate = ieee80211_media_setup(ic, &ic->ic_media, ic->ic_caps, 1, 1073 ieee80211com_media_change, ieee80211com_media_status); 1074 /* NB: strip explicit mode; we're actually in autoselect */ 1075 ifmedia_set(&ic->ic_media, 1076 media_status(ic->ic_opmode, ic->ic_curchan) &~ 1077 (IFM_MMASK | IFM_IEEE80211_TURBO)); 1078 if (maxrate) 1079 ifp->if_baudrate = IF_Mbps(maxrate); 1080 1081 /* XXX need to propagate new media settings to vap's */ 1082} 1083 1084/* XXX inline or eliminate? */ 1085const struct ieee80211_rateset * 1086ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c) 1087{ 1088 /* XXX does this work for 11ng basic rates? */ 1089 return &ic->ic_sup_rates[ieee80211_chan2mode(c)]; 1090} 1091 1092void 1093ieee80211_announce(struct ieee80211com *ic) 1094{ 1095 struct ifnet *ifp = ic->ic_ifp; 1096 int i, mode, rate, mword; 1097 const struct ieee80211_rateset *rs; 1098 1099 /* NB: skip AUTO since it has no rates */ 1100 for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) { 1101 if (isclr(ic->ic_modecaps, mode)) 1102 continue; 1103 if_printf(ifp, "%s rates: ", ieee80211_phymode_name[mode]); 1104 rs = &ic->ic_sup_rates[mode]; 1105 for (i = 0; i < rs->rs_nrates; i++) { 1106 mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode); 1107 if (mword == 0) 1108 continue; 1109 rate = ieee80211_media2rate(mword); 1110 printf("%s%d%sMbps", (i != 0 ? " " : ""), 1111 rate / 2, ((rate & 0x1) != 0 ? ".5" : "")); 1112 } 1113 printf("\n"); 1114 } 1115 ieee80211_ht_announce(ic); 1116} 1117 1118void 1119ieee80211_announce_channels(struct ieee80211com *ic) 1120{ 1121 const struct ieee80211_channel *c; 1122 char type; 1123 int i, cw; 1124 1125 printf("Chan Freq CW RegPwr MinPwr MaxPwr\n"); 1126 for (i = 0; i < ic->ic_nchans; i++) { 1127 c = &ic->ic_channels[i]; 1128 if (IEEE80211_IS_CHAN_ST(c)) 1129 type = 'S'; 1130 else if (IEEE80211_IS_CHAN_108A(c)) 1131 type = 'T'; 1132 else if (IEEE80211_IS_CHAN_108G(c)) 1133 type = 'G'; 1134 else if (IEEE80211_IS_CHAN_HT(c)) 1135 type = 'n'; 1136 else if (IEEE80211_IS_CHAN_A(c)) 1137 type = 'a'; 1138 else if (IEEE80211_IS_CHAN_ANYG(c)) 1139 type = 'g'; 1140 else if (IEEE80211_IS_CHAN_B(c)) 1141 type = 'b'; 1142 else 1143 type = 'f'; 1144 if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c)) 1145 cw = 40; 1146 else if (IEEE80211_IS_CHAN_HALF(c)) 1147 cw = 10; 1148 else if (IEEE80211_IS_CHAN_QUARTER(c)) 1149 cw = 5; 1150 else 1151 cw = 20; 1152 printf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n" 1153 , c->ic_ieee, c->ic_freq, type 1154 , cw 1155 , IEEE80211_IS_CHAN_HT40U(c) ? '+' : 1156 IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' ' 1157 , c->ic_maxregpower 1158 , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0 1159 , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0 1160 ); 1161 } 1162} 1163 1164static int 1165media2mode(const struct ifmedia_entry *ime, uint32_t flags, uint16_t *mode) 1166{ 1167 switch (IFM_MODE(ime->ifm_media)) { 1168 case IFM_IEEE80211_11A: 1169 *mode = IEEE80211_MODE_11A; 1170 break; 1171 case IFM_IEEE80211_11B: 1172 *mode = IEEE80211_MODE_11B; 1173 break; 1174 case IFM_IEEE80211_11G: 1175 *mode = IEEE80211_MODE_11G; 1176 break; 1177 case IFM_IEEE80211_FH: 1178 *mode = IEEE80211_MODE_FH; 1179 break; 1180 case IFM_IEEE80211_11NA: 1181 *mode = IEEE80211_MODE_11NA; 1182 break; 1183 case IFM_IEEE80211_11NG: 1184 *mode = IEEE80211_MODE_11NG; 1185 break; 1186 case IFM_AUTO: 1187 *mode = IEEE80211_MODE_AUTO; 1188 break; 1189 default: 1190 return 0; 1191 } 1192 /* 1193 * Turbo mode is an ``option''. 1194 * XXX does not apply to AUTO 1195 */ 1196 if (ime->ifm_media & IFM_IEEE80211_TURBO) { 1197 if (*mode == IEEE80211_MODE_11A) { 1198 if (flags & IEEE80211_F_TURBOP) 1199 *mode = IEEE80211_MODE_TURBO_A; 1200 else 1201 *mode = IEEE80211_MODE_STURBO_A; 1202 } else if (*mode == IEEE80211_MODE_11G) 1203 *mode = IEEE80211_MODE_TURBO_G; 1204 else 1205 return 0; 1206 } 1207 /* XXX HT40 +/- */ 1208 return 1; 1209} 1210 1211/* 1212 * Handle a media change request on the underlying interface. 1213 */ 1214int 1215ieee80211com_media_change(struct ifnet *ifp) 1216{ 1217 return EINVAL; 1218} 1219 1220/* 1221 * Handle a media change request on the vap interface. 1222 */ 1223int 1224ieee80211_media_change(struct ifnet *ifp) 1225{ 1226 struct ieee80211vap *vap = ifp->if_softc; 1227 struct ifmedia_entry *ime = vap->iv_media.ifm_cur; 1228 uint16_t newmode; 1229 1230 if (!media2mode(ime, vap->iv_flags, &newmode)) 1231 return EINVAL; 1232 if (vap->iv_des_mode != newmode) { 1233 vap->iv_des_mode = newmode; 1234 /* XXX kick state machine if up+running */ 1235 } 1236 return 0; 1237} 1238 1239/* 1240 * Common code to calculate the media status word 1241 * from the operating mode and channel state. 1242 */ 1243static int 1244media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan) 1245{ 1246 int status; 1247 1248 status = IFM_IEEE80211; 1249 switch (opmode) { 1250 case IEEE80211_M_STA: 1251 break; 1252 case IEEE80211_M_IBSS: 1253 status |= IFM_IEEE80211_ADHOC; 1254 break; 1255 case IEEE80211_M_HOSTAP: 1256 status |= IFM_IEEE80211_HOSTAP; 1257 break; 1258 case IEEE80211_M_MONITOR: 1259 status |= IFM_IEEE80211_MONITOR; 1260 break; 1261 case IEEE80211_M_AHDEMO: 1262 status |= IFM_IEEE80211_ADHOC | IFM_FLAG0; 1263 break; 1264 case IEEE80211_M_WDS: 1265 status |= IFM_IEEE80211_WDS; 1266 break; 1267 } 1268 if (IEEE80211_IS_CHAN_HTA(chan)) { 1269 status |= IFM_IEEE80211_11NA; 1270 } else if (IEEE80211_IS_CHAN_HTG(chan)) { 1271 status |= IFM_IEEE80211_11NG; 1272 } else if (IEEE80211_IS_CHAN_A(chan)) { 1273 status |= IFM_IEEE80211_11A; 1274 } else if (IEEE80211_IS_CHAN_B(chan)) { 1275 status |= IFM_IEEE80211_11B; 1276 } else if (IEEE80211_IS_CHAN_ANYG(chan)) { 1277 status |= IFM_IEEE80211_11G; 1278 } else if (IEEE80211_IS_CHAN_FHSS(chan)) { 1279 status |= IFM_IEEE80211_FH; 1280 } 1281 /* XXX else complain? */ 1282 1283 if (IEEE80211_IS_CHAN_TURBO(chan)) 1284 status |= IFM_IEEE80211_TURBO; 1285#if 0 1286 if (IEEE80211_IS_CHAN_HT20(chan)) 1287 status |= IFM_IEEE80211_HT20; 1288 if (IEEE80211_IS_CHAN_HT40(chan)) 1289 status |= IFM_IEEE80211_HT40; 1290#endif 1291 return status; 1292} 1293 1294static void 1295ieee80211com_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1296{ 1297 struct ieee80211com *ic = ifp->if_l2com; 1298 struct ieee80211vap *vap; 1299 1300 imr->ifm_status = IFM_AVALID; 1301 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1302 if (vap->iv_ifp->if_flags & IFF_UP) { 1303 imr->ifm_status |= IFM_ACTIVE; 1304 break; 1305 } 1306 imr->ifm_active = media_status(ic->ic_opmode, ic->ic_curchan); 1307 if (imr->ifm_status & IFM_ACTIVE) 1308 imr->ifm_current = imr->ifm_active; 1309} 1310 1311void 1312ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1313{ 1314 struct ieee80211vap *vap = ifp->if_softc; 1315 struct ieee80211com *ic = vap->iv_ic; 1316 enum ieee80211_phymode mode; 1317 1318 imr->ifm_status = IFM_AVALID; 1319 /* 1320 * NB: use the current channel's mode to lock down a xmit 1321 * rate only when running; otherwise we may have a mismatch 1322 * in which case the rate will not be convertible. 1323 */ 1324 if (vap->iv_state == IEEE80211_S_RUN) { 1325 imr->ifm_status |= IFM_ACTIVE; 1326 mode = ieee80211_chan2mode(ic->ic_curchan); 1327 } else 1328 mode = IEEE80211_MODE_AUTO; 1329 imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan); 1330 /* 1331 * Calculate a current rate if possible. 1332 */ 1333 if (vap->iv_txparms[mode].ucastrate != IEEE80211_FIXED_RATE_NONE) { 1334 /* 1335 * A fixed rate is set, report that. 1336 */ 1337 imr->ifm_active |= ieee80211_rate2media(ic, 1338 vap->iv_txparms[mode].ucastrate, mode); 1339 } else if (vap->iv_opmode == IEEE80211_M_STA) { 1340 /* 1341 * In station mode report the current transmit rate. 1342 */ 1343 imr->ifm_active |= ieee80211_rate2media(ic, 1344 vap->iv_bss->ni_txrate, mode); 1345 } else 1346 imr->ifm_active |= IFM_AUTO; 1347 if (imr->ifm_status & IFM_ACTIVE) 1348 imr->ifm_current = imr->ifm_active; 1349} 1350 1351/* 1352 * Set the current phy mode and recalculate the active channel 1353 * set based on the available channels for this mode. Also 1354 * select a new default/current channel if the current one is 1355 * inappropriate for this mode. 1356 */ 1357int 1358ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode) 1359{ 1360 /* 1361 * Adjust basic rates in 11b/11g supported rate set. 1362 * Note that if operating on a hal/quarter rate channel 1363 * this is a noop as those rates sets are different 1364 * and used instead. 1365 */ 1366 if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B) 1367 ieee80211_setbasicrates(&ic->ic_sup_rates[mode], mode); 1368 1369 ic->ic_curmode = mode; 1370 ieee80211_reset_erp(ic); /* reset ERP state */ 1371 1372 return 0; 1373} 1374 1375/* 1376 * Return the phy mode for with the specified channel. 1377 */ 1378enum ieee80211_phymode 1379ieee80211_chan2mode(const struct ieee80211_channel *chan) 1380{ 1381 1382 if (IEEE80211_IS_CHAN_HTA(chan)) 1383 return IEEE80211_MODE_11NA; 1384 else if (IEEE80211_IS_CHAN_HTG(chan)) 1385 return IEEE80211_MODE_11NG; 1386 else if (IEEE80211_IS_CHAN_108G(chan)) 1387 return IEEE80211_MODE_TURBO_G; 1388 else if (IEEE80211_IS_CHAN_ST(chan)) 1389 return IEEE80211_MODE_STURBO_A; 1390 else if (IEEE80211_IS_CHAN_TURBO(chan)) 1391 return IEEE80211_MODE_TURBO_A; 1392 else if (IEEE80211_IS_CHAN_HALF(chan)) 1393 return IEEE80211_MODE_HALF; 1394 else if (IEEE80211_IS_CHAN_QUARTER(chan)) 1395 return IEEE80211_MODE_QUARTER; 1396 else if (IEEE80211_IS_CHAN_A(chan)) 1397 return IEEE80211_MODE_11A; 1398 else if (IEEE80211_IS_CHAN_ANYG(chan)) 1399 return IEEE80211_MODE_11G; 1400 else if (IEEE80211_IS_CHAN_B(chan)) 1401 return IEEE80211_MODE_11B; 1402 else if (IEEE80211_IS_CHAN_FHSS(chan)) 1403 return IEEE80211_MODE_FH; 1404 1405 /* NB: should not get here */ 1406 printf("%s: cannot map channel to mode; freq %u flags 0x%x\n", 1407 __func__, chan->ic_freq, chan->ic_flags); 1408 return IEEE80211_MODE_11B; 1409} 1410 1411struct ratemedia { 1412 u_int match; /* rate + mode */ 1413 u_int media; /* if_media rate */ 1414}; 1415 1416static int 1417findmedia(const struct ratemedia rates[], int n, u_int match) 1418{ 1419 int i; 1420 1421 for (i = 0; i < n; i++) 1422 if (rates[i].match == match) 1423 return rates[i].media; 1424 return IFM_AUTO; 1425} 1426 1427/* 1428 * Convert IEEE80211 rate value to ifmedia subtype. 1429 * Rate is either a legacy rate in units of 0.5Mbps 1430 * or an MCS index. 1431 */ 1432int 1433ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode) 1434{ 1435#define N(a) (sizeof(a) / sizeof(a[0])) 1436 static const struct ratemedia rates[] = { 1437 { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 }, 1438 { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 }, 1439 { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 }, 1440 { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 }, 1441 { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 }, 1442 { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 }, 1443 { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 }, 1444 { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 }, 1445 { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 }, 1446 { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 }, 1447 { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 }, 1448 { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 }, 1449 { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 }, 1450 { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 }, 1451 { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 }, 1452 { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 }, 1453 { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 }, 1454 { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 }, 1455 { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 }, 1456 { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 }, 1457 { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 }, 1458 { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 }, 1459 { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 }, 1460 { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 }, 1461 { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 }, 1462 { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 }, 1463 { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 }, 1464 { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 }, 1465 { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 }, 1466 { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 }, 1467 /* NB: OFDM72 doesn't realy exist so we don't handle it */ 1468 }; 1469 static const struct ratemedia htrates[] = { 1470 { 0, IFM_IEEE80211_MCS }, 1471 { 1, IFM_IEEE80211_MCS }, 1472 { 2, IFM_IEEE80211_MCS }, 1473 { 3, IFM_IEEE80211_MCS }, 1474 { 4, IFM_IEEE80211_MCS }, 1475 { 5, IFM_IEEE80211_MCS }, 1476 { 6, IFM_IEEE80211_MCS }, 1477 { 7, IFM_IEEE80211_MCS }, 1478 { 8, IFM_IEEE80211_MCS }, 1479 { 9, IFM_IEEE80211_MCS }, 1480 { 10, IFM_IEEE80211_MCS }, 1481 { 11, IFM_IEEE80211_MCS }, 1482 { 12, IFM_IEEE80211_MCS }, 1483 { 13, IFM_IEEE80211_MCS }, 1484 { 14, IFM_IEEE80211_MCS }, 1485 { 15, IFM_IEEE80211_MCS }, 1486 }; 1487 int m; 1488 1489 /* 1490 * Check 11n rates first for match as an MCS. 1491 */ 1492 if (mode == IEEE80211_MODE_11NA) { 1493 if (rate & IEEE80211_RATE_MCS) { 1494 rate &= ~IEEE80211_RATE_MCS; 1495 m = findmedia(htrates, N(htrates), rate); 1496 if (m != IFM_AUTO) 1497 return m | IFM_IEEE80211_11NA; 1498 } 1499 } else if (mode == IEEE80211_MODE_11NG) { 1500 /* NB: 12 is ambiguous, it will be treated as an MCS */ 1501 if (rate & IEEE80211_RATE_MCS) { 1502 rate &= ~IEEE80211_RATE_MCS; 1503 m = findmedia(htrates, N(htrates), rate); 1504 if (m != IFM_AUTO) 1505 return m | IFM_IEEE80211_11NG; 1506 } 1507 } 1508 rate &= IEEE80211_RATE_VAL; 1509 switch (mode) { 1510 case IEEE80211_MODE_11A: 1511 case IEEE80211_MODE_HALF: /* XXX good 'nuf */ 1512 case IEEE80211_MODE_QUARTER: 1513 case IEEE80211_MODE_11NA: 1514 case IEEE80211_MODE_TURBO_A: 1515 case IEEE80211_MODE_STURBO_A: 1516 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11A); 1517 case IEEE80211_MODE_11B: 1518 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11B); 1519 case IEEE80211_MODE_FH: 1520 return findmedia(rates, N(rates), rate | IFM_IEEE80211_FH); 1521 case IEEE80211_MODE_AUTO: 1522 /* NB: ic may be NULL for some drivers */ 1523 if (ic != NULL && ic->ic_phytype == IEEE80211_T_FH) 1524 return findmedia(rates, N(rates), 1525 rate | IFM_IEEE80211_FH); 1526 /* NB: hack, 11g matches both 11b+11a rates */ 1527 /* fall thru... */ 1528 case IEEE80211_MODE_11G: 1529 case IEEE80211_MODE_11NG: 1530 case IEEE80211_MODE_TURBO_G: 1531 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11G); 1532 } 1533 return IFM_AUTO; 1534#undef N 1535} 1536 1537int 1538ieee80211_media2rate(int mword) 1539{ 1540#define N(a) (sizeof(a) / sizeof(a[0])) 1541 static const int ieeerates[] = { 1542 -1, /* IFM_AUTO */ 1543 0, /* IFM_MANUAL */ 1544 0, /* IFM_NONE */ 1545 2, /* IFM_IEEE80211_FH1 */ 1546 4, /* IFM_IEEE80211_FH2 */ 1547 2, /* IFM_IEEE80211_DS1 */ 1548 4, /* IFM_IEEE80211_DS2 */ 1549 11, /* IFM_IEEE80211_DS5 */ 1550 22, /* IFM_IEEE80211_DS11 */ 1551 44, /* IFM_IEEE80211_DS22 */ 1552 12, /* IFM_IEEE80211_OFDM6 */ 1553 18, /* IFM_IEEE80211_OFDM9 */ 1554 24, /* IFM_IEEE80211_OFDM12 */ 1555 36, /* IFM_IEEE80211_OFDM18 */ 1556 48, /* IFM_IEEE80211_OFDM24 */ 1557 72, /* IFM_IEEE80211_OFDM36 */ 1558 96, /* IFM_IEEE80211_OFDM48 */ 1559 108, /* IFM_IEEE80211_OFDM54 */ 1560 144, /* IFM_IEEE80211_OFDM72 */ 1561 0, /* IFM_IEEE80211_DS354k */ 1562 0, /* IFM_IEEE80211_DS512k */ 1563 6, /* IFM_IEEE80211_OFDM3 */ 1564 9, /* IFM_IEEE80211_OFDM4 */ 1565 54, /* IFM_IEEE80211_OFDM27 */ 1566 -1, /* IFM_IEEE80211_MCS */ 1567 }; 1568 return IFM_SUBTYPE(mword) < N(ieeerates) ? 1569 ieeerates[IFM_SUBTYPE(mword)] : 0; 1570#undef N 1571} 1572 1573/* 1574 * The following hash function is adapted from "Hash Functions" by Bob Jenkins 1575 * ("Algorithm Alley", Dr. Dobbs Journal, September 1997). 1576 */ 1577#define mix(a, b, c) \ 1578do { \ 1579 a -= b; a -= c; a ^= (c >> 13); \ 1580 b -= c; b -= a; b ^= (a << 8); \ 1581 c -= a; c -= b; c ^= (b >> 13); \ 1582 a -= b; a -= c; a ^= (c >> 12); \ 1583 b -= c; b -= a; b ^= (a << 16); \ 1584 c -= a; c -= b; c ^= (b >> 5); \ 1585 a -= b; a -= c; a ^= (c >> 3); \ 1586 b -= c; b -= a; b ^= (a << 10); \ 1587 c -= a; c -= b; c ^= (b >> 15); \ 1588} while (/*CONSTCOND*/0) 1589 1590uint32_t 1591ieee80211_mac_hash(const struct ieee80211com *ic, 1592 const uint8_t addr[IEEE80211_ADDR_LEN]) 1593{ 1594 uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = ic->ic_hash_key; 1595 1596 b += addr[5] << 8; 1597 b += addr[4]; 1598 a += addr[3] << 24; 1599 a += addr[2] << 16; 1600 a += addr[1] << 8; 1601 a += addr[0]; 1602 1603 mix(a, b, c); 1604 1605 return c; 1606} 1607#undef mix 1608