ieee80211.c revision 196159
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 196159 2009-08-12 21:19:19Z 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#ifdef IEEE80211_SUPPORT_MESH 78 [IEEE80211_M_MBSS] = IEEE80211_C_MBSS, 79#endif 80}; 81 82static const uint8_t ieee80211broadcastaddr[IEEE80211_ADDR_LEN] = 83 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 84 85static void ieee80211_syncflag_locked(struct ieee80211com *ic, int flag); 86static void ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag); 87static void ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag); 88static int ieee80211_media_setup(struct ieee80211com *ic, 89 struct ifmedia *media, int caps, int addsta, 90 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat); 91static void ieee80211com_media_status(struct ifnet *, struct ifmediareq *); 92static int ieee80211com_media_change(struct ifnet *); 93static int media_status(enum ieee80211_opmode, 94 const struct ieee80211_channel *); 95 96MALLOC_DEFINE(M_80211_VAP, "80211vap", "802.11 vap state"); 97 98/* 99 * Default supported rates for 802.11 operation (in IEEE .5Mb units). 100 */ 101#define B(r) ((r) | IEEE80211_RATE_BASIC) 102static const struct ieee80211_rateset ieee80211_rateset_11a = 103 { 8, { B(12), 18, B(24), 36, B(48), 72, 96, 108 } }; 104static const struct ieee80211_rateset ieee80211_rateset_half = 105 { 8, { B(6), 9, B(12), 18, B(24), 36, 48, 54 } }; 106static const struct ieee80211_rateset ieee80211_rateset_quarter = 107 { 8, { B(3), 4, B(6), 9, B(12), 18, 24, 27 } }; 108static const struct ieee80211_rateset ieee80211_rateset_11b = 109 { 4, { B(2), B(4), B(11), B(22) } }; 110/* NB: OFDM rates are handled specially based on mode */ 111static const struct ieee80211_rateset ieee80211_rateset_11g = 112 { 12, { B(2), B(4), B(11), B(22), 12, 18, 24, 36, 48, 72, 96, 108 } }; 113#undef B 114 115/* 116 * Fill in 802.11 available channel set, mark 117 * all available channels as active, and pick 118 * a default channel if not already specified. 119 */ 120static void 121ieee80211_chan_init(struct ieee80211com *ic) 122{ 123#define DEFAULTRATES(m, def) do { \ 124 if (ic->ic_sup_rates[m].rs_nrates == 0) \ 125 ic->ic_sup_rates[m] = def; \ 126} while (0) 127 struct ieee80211_channel *c; 128 int i; 129 130 KASSERT(0 < ic->ic_nchans && ic->ic_nchans <= IEEE80211_CHAN_MAX, 131 ("invalid number of channels specified: %u", ic->ic_nchans)); 132 memset(ic->ic_chan_avail, 0, sizeof(ic->ic_chan_avail)); 133 memset(ic->ic_modecaps, 0, sizeof(ic->ic_modecaps)); 134 setbit(ic->ic_modecaps, IEEE80211_MODE_AUTO); 135 for (i = 0; i < ic->ic_nchans; i++) { 136 c = &ic->ic_channels[i]; 137 KASSERT(c->ic_flags != 0, ("channel with no flags")); 138 /* 139 * Help drivers that work only with frequencies by filling 140 * in IEEE channel #'s if not already calculated. Note this 141 * mimics similar work done in ieee80211_setregdomain when 142 * changing regulatory state. 143 */ 144 if (c->ic_ieee == 0) 145 c->ic_ieee = ieee80211_mhz2ieee(c->ic_freq,c->ic_flags); 146 if (IEEE80211_IS_CHAN_HT40(c) && c->ic_extieee == 0) 147 c->ic_extieee = ieee80211_mhz2ieee(c->ic_freq + 148 (IEEE80211_IS_CHAN_HT40U(c) ? 20 : -20), 149 c->ic_flags); 150 /* default max tx power to max regulatory */ 151 if (c->ic_maxpower == 0) 152 c->ic_maxpower = 2*c->ic_maxregpower; 153 setbit(ic->ic_chan_avail, c->ic_ieee); 154 /* 155 * Identify mode capabilities. 156 */ 157 if (IEEE80211_IS_CHAN_A(c)) 158 setbit(ic->ic_modecaps, IEEE80211_MODE_11A); 159 if (IEEE80211_IS_CHAN_B(c)) 160 setbit(ic->ic_modecaps, IEEE80211_MODE_11B); 161 if (IEEE80211_IS_CHAN_ANYG(c)) 162 setbit(ic->ic_modecaps, IEEE80211_MODE_11G); 163 if (IEEE80211_IS_CHAN_FHSS(c)) 164 setbit(ic->ic_modecaps, IEEE80211_MODE_FH); 165 if (IEEE80211_IS_CHAN_108A(c)) 166 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_A); 167 if (IEEE80211_IS_CHAN_108G(c)) 168 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_G); 169 if (IEEE80211_IS_CHAN_ST(c)) 170 setbit(ic->ic_modecaps, IEEE80211_MODE_STURBO_A); 171 if (IEEE80211_IS_CHAN_HALF(c)) 172 setbit(ic->ic_modecaps, IEEE80211_MODE_HALF); 173 if (IEEE80211_IS_CHAN_QUARTER(c)) 174 setbit(ic->ic_modecaps, IEEE80211_MODE_QUARTER); 175 if (IEEE80211_IS_CHAN_HTA(c)) 176 setbit(ic->ic_modecaps, IEEE80211_MODE_11NA); 177 if (IEEE80211_IS_CHAN_HTG(c)) 178 setbit(ic->ic_modecaps, IEEE80211_MODE_11NG); 179 } 180 /* initialize candidate channels to all available */ 181 memcpy(ic->ic_chan_active, ic->ic_chan_avail, 182 sizeof(ic->ic_chan_avail)); 183 184 /* sort channel table to allow lookup optimizations */ 185 ieee80211_sort_channels(ic->ic_channels, ic->ic_nchans); 186 187 /* invalidate any previous state */ 188 ic->ic_bsschan = IEEE80211_CHAN_ANYC; 189 ic->ic_prevchan = NULL; 190 ic->ic_csa_newchan = NULL; 191 /* arbitrarily pick the first channel */ 192 ic->ic_curchan = &ic->ic_channels[0]; 193 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 194 195 /* fillin well-known rate sets if driver has not specified */ 196 DEFAULTRATES(IEEE80211_MODE_11B, ieee80211_rateset_11b); 197 DEFAULTRATES(IEEE80211_MODE_11G, ieee80211_rateset_11g); 198 DEFAULTRATES(IEEE80211_MODE_11A, ieee80211_rateset_11a); 199 DEFAULTRATES(IEEE80211_MODE_TURBO_A, ieee80211_rateset_11a); 200 DEFAULTRATES(IEEE80211_MODE_TURBO_G, ieee80211_rateset_11g); 201 DEFAULTRATES(IEEE80211_MODE_STURBO_A, ieee80211_rateset_11a); 202 DEFAULTRATES(IEEE80211_MODE_HALF, ieee80211_rateset_half); 203 DEFAULTRATES(IEEE80211_MODE_QUARTER, ieee80211_rateset_quarter); 204 DEFAULTRATES(IEEE80211_MODE_11NA, ieee80211_rateset_11a); 205 DEFAULTRATES(IEEE80211_MODE_11NG, ieee80211_rateset_11g); 206 207 /* 208 * Set auto mode to reset active channel state and any desired channel. 209 */ 210 (void) ieee80211_setmode(ic, IEEE80211_MODE_AUTO); 211#undef DEFAULTRATES 212} 213 214static void 215null_update_mcast(struct ifnet *ifp) 216{ 217 if_printf(ifp, "need multicast update callback\n"); 218} 219 220static void 221null_update_promisc(struct ifnet *ifp) 222{ 223 if_printf(ifp, "need promiscuous mode update callback\n"); 224} 225 226static int 227null_transmit(struct ifnet *ifp, struct mbuf *m) 228{ 229 m_freem(m); 230 ifp->if_oerrors++; 231 return EACCES; /* XXX EIO/EPERM? */ 232} 233 234static int 235null_output(struct ifnet *ifp, struct mbuf *m, 236 struct sockaddr *dst, struct route *ro) 237{ 238 if_printf(ifp, "discard raw packet\n"); 239 return null_transmit(ifp, m); 240} 241 242static void 243null_input(struct ifnet *ifp, struct mbuf *m) 244{ 245 if_printf(ifp, "if_input should not be called\n"); 246 m_freem(m); 247} 248 249/* 250 * Attach/setup the common net80211 state. Called by 251 * the driver on attach to prior to creating any vap's. 252 */ 253void 254ieee80211_ifattach(struct ieee80211com *ic, 255 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 256{ 257 struct ifnet *ifp = ic->ic_ifp; 258 struct sockaddr_dl *sdl; 259 struct ifaddr *ifa; 260 261 KASSERT(ifp->if_type == IFT_IEEE80211, ("if_type %d", ifp->if_type)); 262 263 IEEE80211_LOCK_INIT(ic, ifp->if_xname); 264 TAILQ_INIT(&ic->ic_vaps); 265 266 /* Create a taskqueue for all state changes */ 267 ic->ic_tq = taskqueue_create("ic_taskq", M_WAITOK | M_ZERO, 268 taskqueue_thread_enqueue, &ic->ic_tq); 269 taskqueue_start_threads(&ic->ic_tq, 1, PI_NET, "%s taskq", 270 ifp->if_xname); 271 /* 272 * Fill in 802.11 available channel set, mark all 273 * available channels as active, and pick a default 274 * channel if not already specified. 275 */ 276 ieee80211_media_init(ic); 277 278 ic->ic_update_mcast = null_update_mcast; 279 ic->ic_update_promisc = null_update_promisc; 280 281 ic->ic_hash_key = arc4random(); 282 ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT; 283 ic->ic_lintval = ic->ic_bintval; 284 ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX; 285 286 ieee80211_crypto_attach(ic); 287 ieee80211_node_attach(ic); 288 ieee80211_power_attach(ic); 289 ieee80211_proto_attach(ic); 290#ifdef IEEE80211_SUPPORT_SUPERG 291 ieee80211_superg_attach(ic); 292#endif 293 ieee80211_ht_attach(ic); 294 ieee80211_scan_attach(ic); 295 ieee80211_regdomain_attach(ic); 296 ieee80211_dfs_attach(ic); 297 298 ieee80211_sysctl_attach(ic); 299 300 ifp->if_addrlen = IEEE80211_ADDR_LEN; 301 ifp->if_hdrlen = 0; 302 if_attach(ifp); 303 ifp->if_mtu = IEEE80211_MTU_MAX; 304 ifp->if_broadcastaddr = ieee80211broadcastaddr; 305 ifp->if_output = null_output; 306 ifp->if_input = null_input; /* just in case */ 307 ifp->if_resolvemulti = NULL; /* NB: callers check */ 308 309 ifa = ifaddr_byindex(ifp->if_index); 310 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); 311 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 312 sdl->sdl_type = IFT_ETHER; /* XXX IFT_IEEE80211? */ 313 sdl->sdl_alen = IEEE80211_ADDR_LEN; 314 IEEE80211_ADDR_COPY(LLADDR(sdl), macaddr); 315 ifa_free(ifa); 316} 317 318/* 319 * Detach net80211 state on device detach. Tear down 320 * all vap's and reclaim all common state prior to the 321 * device state going away. Note we may call back into 322 * driver; it must be prepared for this. 323 */ 324void 325ieee80211_ifdetach(struct ieee80211com *ic) 326{ 327 struct ifnet *ifp = ic->ic_ifp; 328 struct ieee80211vap *vap; 329 330 if_detach(ifp); 331 332 while ((vap = TAILQ_FIRST(&ic->ic_vaps)) != NULL) 333 ieee80211_vap_destroy(vap); 334 ieee80211_waitfor_parent(ic); 335 336 ieee80211_sysctl_detach(ic); 337 ieee80211_dfs_detach(ic); 338 ieee80211_regdomain_detach(ic); 339 ieee80211_scan_detach(ic); 340#ifdef IEEE80211_SUPPORT_SUPERG 341 ieee80211_superg_detach(ic); 342#endif 343 ieee80211_ht_detach(ic); 344 /* NB: must be called before ieee80211_node_detach */ 345 ieee80211_proto_detach(ic); 346 ieee80211_crypto_detach(ic); 347 ieee80211_power_detach(ic); 348 ieee80211_node_detach(ic); 349 350 ifmedia_removeall(&ic->ic_media); 351 taskqueue_free(ic->ic_tq); 352 IEEE80211_LOCK_DESTROY(ic); 353} 354 355/* 356 * Default reset method for use with the ioctl support. This 357 * method is invoked after any state change in the 802.11 358 * layer that should be propagated to the hardware but not 359 * require re-initialization of the 802.11 state machine (e.g 360 * rescanning for an ap). We always return ENETRESET which 361 * should cause the driver to re-initialize the device. Drivers 362 * can override this method to implement more optimized support. 363 */ 364static int 365default_reset(struct ieee80211vap *vap, u_long cmd) 366{ 367 return ENETRESET; 368} 369 370/* 371 * Prepare a vap for use. Drivers use this call to 372 * setup net80211 state in new vap's prior attaching 373 * them with ieee80211_vap_attach (below). 374 */ 375int 376ieee80211_vap_setup(struct ieee80211com *ic, struct ieee80211vap *vap, 377 const char name[IFNAMSIZ], int unit, int opmode, int flags, 378 const uint8_t bssid[IEEE80211_ADDR_LEN], 379 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 380{ 381 struct ifnet *ifp; 382 383 ifp = if_alloc(IFT_ETHER); 384 if (ifp == NULL) { 385 if_printf(ic->ic_ifp, "%s: unable to allocate ifnet\n", 386 __func__); 387 return ENOMEM; 388 } 389 if_initname(ifp, name, unit); 390 ifp->if_softc = vap; /* back pointer */ 391 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 392 ifp->if_start = ieee80211_start; 393 ifp->if_ioctl = ieee80211_ioctl; 394 ifp->if_watchdog = NULL; /* NB: no watchdog routine */ 395 ifp->if_init = ieee80211_init; 396 /* NB: input+output filled in by ether_ifattach */ 397 IFQ_SET_MAXLEN(&ifp->if_snd, IFQ_MAXLEN); 398 ifp->if_snd.ifq_drv_maxlen = IFQ_MAXLEN; 399 IFQ_SET_READY(&ifp->if_snd); 400 401 vap->iv_ifp = ifp; 402 vap->iv_ic = ic; 403 vap->iv_flags = ic->ic_flags; /* propagate common flags */ 404 vap->iv_flags_ext = ic->ic_flags_ext; 405 vap->iv_flags_ven = ic->ic_flags_ven; 406 vap->iv_caps = ic->ic_caps &~ IEEE80211_C_OPMODE; 407 vap->iv_htcaps = ic->ic_htcaps; 408 vap->iv_opmode = opmode; 409 vap->iv_caps |= ieee80211_opcap[opmode]; 410 switch (opmode) { 411 case IEEE80211_M_WDS: 412 /* 413 * WDS links must specify the bssid of the far end. 414 * For legacy operation this is a static relationship. 415 * For non-legacy operation the station must associate 416 * and be authorized to pass traffic. Plumbing the 417 * vap to the proper node happens when the vap 418 * transitions to RUN state. 419 */ 420 IEEE80211_ADDR_COPY(vap->iv_des_bssid, bssid); 421 vap->iv_flags |= IEEE80211_F_DESBSSID; 422 if (flags & IEEE80211_CLONE_WDSLEGACY) 423 vap->iv_flags_ext |= IEEE80211_FEXT_WDSLEGACY; 424 break; 425#ifdef IEEE80211_SUPPORT_TDMA 426 case IEEE80211_M_AHDEMO: 427 if (flags & IEEE80211_CLONE_TDMA) { 428 /* NB: checked before clone operation allowed */ 429 KASSERT(ic->ic_caps & IEEE80211_C_TDMA, 430 ("not TDMA capable, ic_caps 0x%x", ic->ic_caps)); 431 /* 432 * Propagate TDMA capability to mark vap; this 433 * cannot be removed and is used to distinguish 434 * regular ahdemo operation from ahdemo+tdma. 435 */ 436 vap->iv_caps |= IEEE80211_C_TDMA; 437 } 438 break; 439#endif 440 } 441 /* auto-enable s/w beacon miss support */ 442 if (flags & IEEE80211_CLONE_NOBEACONS) 443 vap->iv_flags_ext |= IEEE80211_FEXT_SWBMISS; 444 /* 445 * Enable various functionality by default if we're 446 * capable; the driver can override us if it knows better. 447 */ 448 if (vap->iv_caps & IEEE80211_C_WME) 449 vap->iv_flags |= IEEE80211_F_WME; 450 if (vap->iv_caps & IEEE80211_C_BURST) 451 vap->iv_flags |= IEEE80211_F_BURST; 452 /* NB: bg scanning only makes sense for station mode right now */ 453 if (vap->iv_opmode == IEEE80211_M_STA && 454 (vap->iv_caps & IEEE80211_C_BGSCAN)) 455 vap->iv_flags |= IEEE80211_F_BGSCAN; 456 vap->iv_flags |= IEEE80211_F_DOTH; /* XXX no cap, just ena */ 457 /* NB: DFS support only makes sense for ap mode right now */ 458 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 459 (vap->iv_caps & IEEE80211_C_DFS)) 460 vap->iv_flags_ext |= IEEE80211_FEXT_DFS; 461 462 vap->iv_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */ 463 vap->iv_bmissthreshold = IEEE80211_HWBMISS_DEFAULT; 464 vap->iv_dtim_period = IEEE80211_DTIM_DEFAULT; 465 /* 466 * Install a default reset method for the ioctl support; 467 * the driver can override this. 468 */ 469 vap->iv_reset = default_reset; 470 471 IEEE80211_ADDR_COPY(vap->iv_myaddr, macaddr); 472 473 ieee80211_sysctl_vattach(vap); 474 ieee80211_crypto_vattach(vap); 475 ieee80211_node_vattach(vap); 476 ieee80211_power_vattach(vap); 477 ieee80211_proto_vattach(vap); 478#ifdef IEEE80211_SUPPORT_SUPERG 479 ieee80211_superg_vattach(vap); 480#endif 481 ieee80211_ht_vattach(vap); 482 ieee80211_scan_vattach(vap); 483 ieee80211_regdomain_vattach(vap); 484 ieee80211_radiotap_vattach(vap); 485 486 return 0; 487} 488 489/* 490 * Activate a vap. State should have been prepared with a 491 * call to ieee80211_vap_setup and by the driver. On return 492 * from this call the vap is ready for use. 493 */ 494int 495ieee80211_vap_attach(struct ieee80211vap *vap, 496 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) 497{ 498 struct ifnet *ifp = vap->iv_ifp; 499 struct ieee80211com *ic = vap->iv_ic; 500 struct ifmediareq imr; 501 int maxrate; 502 503 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 504 "%s: %s parent %s flags 0x%x flags_ext 0x%x\n", 505 __func__, ieee80211_opmode_name[vap->iv_opmode], 506 ic->ic_ifp->if_xname, vap->iv_flags, vap->iv_flags_ext); 507 508 /* 509 * Do late attach work that cannot happen until after 510 * the driver has had a chance to override defaults. 511 */ 512 ieee80211_node_latevattach(vap); 513 ieee80211_power_latevattach(vap); 514 515 maxrate = ieee80211_media_setup(ic, &vap->iv_media, vap->iv_caps, 516 vap->iv_opmode == IEEE80211_M_STA, media_change, media_stat); 517 ieee80211_media_status(ifp, &imr); 518 /* NB: strip explicit mode; we're actually in autoselect */ 519 ifmedia_set(&vap->iv_media, 520 imr.ifm_active &~ (IFM_MMASK | IFM_IEEE80211_TURBO)); 521 if (maxrate) 522 ifp->if_baudrate = IF_Mbps(maxrate); 523 524 ether_ifattach(ifp, vap->iv_myaddr); 525 if (vap->iv_opmode == IEEE80211_M_MONITOR) { 526 /* NB: disallow transmit */ 527 ifp->if_transmit = null_transmit; 528 ifp->if_output = null_output; 529 } else { 530 /* hook output method setup by ether_ifattach */ 531 vap->iv_output = ifp->if_output; 532 ifp->if_output = ieee80211_output; 533 } 534 /* NB: if_mtu set by ether_ifattach to ETHERMTU */ 535 536 IEEE80211_LOCK(ic); 537 TAILQ_INSERT_TAIL(&ic->ic_vaps, vap, iv_next); 538 ieee80211_syncflag_locked(ic, IEEE80211_F_WME); 539#ifdef IEEE80211_SUPPORT_SUPERG 540 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); 541#endif 542 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); 543 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); 544 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT); 545 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40); 546 ieee80211_syncifflag_locked(ic, IFF_PROMISC); 547 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI); 548 IEEE80211_UNLOCK(ic); 549 550 return 1; 551} 552 553/* 554 * Tear down vap state and reclaim the ifnet. 555 * The driver is assumed to have prepared for 556 * this; e.g. by turning off interrupts for the 557 * underlying device. 558 */ 559void 560ieee80211_vap_detach(struct ieee80211vap *vap) 561{ 562 struct ieee80211com *ic = vap->iv_ic; 563 struct ifnet *ifp = vap->iv_ifp; 564 565 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s parent %s\n", 566 __func__, ieee80211_opmode_name[vap->iv_opmode], 567 ic->ic_ifp->if_xname); 568 569 /* NB: bpfdetach is called by ether_ifdetach and claims all taps */ 570 ether_ifdetach(ifp); 571 572 ieee80211_stop(vap); 573 574 /* 575 * Flush any deferred vap tasks. 576 */ 577 ieee80211_draintask(ic, &vap->iv_nstate_task); 578 ieee80211_draintask(ic, &vap->iv_swbmiss_task); 579 580 /* XXX band-aid until ifnet handles this for us */ 581 taskqueue_drain(taskqueue_swi, &ifp->if_linktask); 582 583 IEEE80211_LOCK(ic); 584 KASSERT(vap->iv_state == IEEE80211_S_INIT , ("vap still running")); 585 TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next); 586 ieee80211_syncflag_locked(ic, IEEE80211_F_WME); 587#ifdef IEEE80211_SUPPORT_SUPERG 588 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); 589#endif 590 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); 591 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); 592 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT); 593 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40); 594 /* NB: this handles the bpfdetach done below */ 595 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_BPF); 596 ieee80211_syncifflag_locked(ic, IFF_PROMISC); 597 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI); 598 IEEE80211_UNLOCK(ic); 599 600 ifmedia_removeall(&vap->iv_media); 601 602 ieee80211_radiotap_vdetach(vap); 603 ieee80211_regdomain_vdetach(vap); 604 ieee80211_scan_vdetach(vap); 605#ifdef IEEE80211_SUPPORT_SUPERG 606 ieee80211_superg_vdetach(vap); 607#endif 608 ieee80211_ht_vdetach(vap); 609 /* NB: must be before ieee80211_node_vdetach */ 610 ieee80211_proto_vdetach(vap); 611 ieee80211_crypto_vdetach(vap); 612 ieee80211_power_vdetach(vap); 613 ieee80211_node_vdetach(vap); 614 ieee80211_sysctl_vdetach(vap); 615 616 if_free(ifp); 617} 618 619/* 620 * Synchronize flag bit state in the parent ifnet structure 621 * according to the state of all vap ifnet's. This is used, 622 * for example, to handle IFF_PROMISC and IFF_ALLMULTI. 623 */ 624void 625ieee80211_syncifflag_locked(struct ieee80211com *ic, int flag) 626{ 627 struct ifnet *ifp = ic->ic_ifp; 628 struct ieee80211vap *vap; 629 int bit, oflags; 630 631 IEEE80211_LOCK_ASSERT(ic); 632 633 bit = 0; 634 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 635 if (vap->iv_ifp->if_flags & flag) { 636 /* 637 * XXX the bridge sets PROMISC but we don't want to 638 * enable it on the device, discard here so all the 639 * drivers don't need to special-case it 640 */ 641 if (flag == IFF_PROMISC && 642 !(vap->iv_opmode == IEEE80211_M_MONITOR || 643 (vap->iv_opmode == IEEE80211_M_AHDEMO && 644 (vap->iv_caps & IEEE80211_C_TDMA) == 0))) 645 continue; 646 bit = 1; 647 break; 648 } 649 oflags = ifp->if_flags; 650 if (bit) 651 ifp->if_flags |= flag; 652 else 653 ifp->if_flags &= ~flag; 654 if ((ifp->if_flags ^ oflags) & flag) { 655 /* XXX should we return 1/0 and let caller do this? */ 656 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 657 if (flag == IFF_PROMISC) 658 ieee80211_runtask(ic, &ic->ic_promisc_task); 659 else if (flag == IFF_ALLMULTI) 660 ieee80211_runtask(ic, &ic->ic_mcast_task); 661 } 662 } 663} 664 665/* 666 * Synchronize flag bit state in the com structure 667 * according to the state of all vap's. This is used, 668 * for example, to handle state changes via ioctls. 669 */ 670static void 671ieee80211_syncflag_locked(struct ieee80211com *ic, int flag) 672{ 673 struct ieee80211vap *vap; 674 int bit; 675 676 IEEE80211_LOCK_ASSERT(ic); 677 678 bit = 0; 679 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 680 if (vap->iv_flags & flag) { 681 bit = 1; 682 break; 683 } 684 if (bit) 685 ic->ic_flags |= flag; 686 else 687 ic->ic_flags &= ~flag; 688} 689 690void 691ieee80211_syncflag(struct ieee80211vap *vap, int flag) 692{ 693 struct ieee80211com *ic = vap->iv_ic; 694 695 IEEE80211_LOCK(ic); 696 if (flag < 0) { 697 flag = -flag; 698 vap->iv_flags &= ~flag; 699 } else 700 vap->iv_flags |= flag; 701 ieee80211_syncflag_locked(ic, flag); 702 IEEE80211_UNLOCK(ic); 703} 704 705/* 706 * Synchronize flags_ht bit state in the com structure 707 * according to the state of all vap's. This is used, 708 * for example, to handle state changes via ioctls. 709 */ 710static void 711ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag) 712{ 713 struct ieee80211vap *vap; 714 int bit; 715 716 IEEE80211_LOCK_ASSERT(ic); 717 718 bit = 0; 719 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 720 if (vap->iv_flags_ht & flag) { 721 bit = 1; 722 break; 723 } 724 if (bit) 725 ic->ic_flags_ht |= flag; 726 else 727 ic->ic_flags_ht &= ~flag; 728} 729 730void 731ieee80211_syncflag_ht(struct ieee80211vap *vap, int flag) 732{ 733 struct ieee80211com *ic = vap->iv_ic; 734 735 IEEE80211_LOCK(ic); 736 if (flag < 0) { 737 flag = -flag; 738 vap->iv_flags_ht &= ~flag; 739 } else 740 vap->iv_flags_ht |= flag; 741 ieee80211_syncflag_ht_locked(ic, flag); 742 IEEE80211_UNLOCK(ic); 743} 744 745/* 746 * Synchronize flags_ext bit state in the com structure 747 * according to the state of all vap's. This is used, 748 * for example, to handle state changes via ioctls. 749 */ 750static void 751ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag) 752{ 753 struct ieee80211vap *vap; 754 int bit; 755 756 IEEE80211_LOCK_ASSERT(ic); 757 758 bit = 0; 759 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 760 if (vap->iv_flags_ext & flag) { 761 bit = 1; 762 break; 763 } 764 if (bit) 765 ic->ic_flags_ext |= flag; 766 else 767 ic->ic_flags_ext &= ~flag; 768} 769 770void 771ieee80211_syncflag_ext(struct ieee80211vap *vap, int flag) 772{ 773 struct ieee80211com *ic = vap->iv_ic; 774 775 IEEE80211_LOCK(ic); 776 if (flag < 0) { 777 flag = -flag; 778 vap->iv_flags_ext &= ~flag; 779 } else 780 vap->iv_flags_ext |= flag; 781 ieee80211_syncflag_ext_locked(ic, flag); 782 IEEE80211_UNLOCK(ic); 783} 784 785static __inline int 786mapgsm(u_int freq, u_int flags) 787{ 788 freq *= 10; 789 if (flags & IEEE80211_CHAN_QUARTER) 790 freq += 5; 791 else if (flags & IEEE80211_CHAN_HALF) 792 freq += 10; 793 else 794 freq += 20; 795 /* NB: there is no 907/20 wide but leave room */ 796 return (freq - 906*10) / 5; 797} 798 799static __inline int 800mappsb(u_int freq, u_int flags) 801{ 802 return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5; 803} 804 805/* 806 * Convert MHz frequency to IEEE channel number. 807 */ 808int 809ieee80211_mhz2ieee(u_int freq, u_int flags) 810{ 811#define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990) 812 if (flags & IEEE80211_CHAN_GSM) 813 return mapgsm(freq, flags); 814 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 815 if (freq == 2484) 816 return 14; 817 if (freq < 2484) 818 return ((int) freq - 2407) / 5; 819 else 820 return 15 + ((freq - 2512) / 20); 821 } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */ 822 if (freq <= 5000) { 823 /* XXX check regdomain? */ 824 if (IS_FREQ_IN_PSB(freq)) 825 return mappsb(freq, flags); 826 return (freq - 4000) / 5; 827 } else 828 return (freq - 5000) / 5; 829 } else { /* either, guess */ 830 if (freq == 2484) 831 return 14; 832 if (freq < 2484) { 833 if (907 <= freq && freq <= 922) 834 return mapgsm(freq, flags); 835 return ((int) freq - 2407) / 5; 836 } 837 if (freq < 5000) { 838 if (IS_FREQ_IN_PSB(freq)) 839 return mappsb(freq, flags); 840 else if (freq > 4900) 841 return (freq - 4000) / 5; 842 else 843 return 15 + ((freq - 2512) / 20); 844 } 845 return (freq - 5000) / 5; 846 } 847#undef IS_FREQ_IN_PSB 848} 849 850/* 851 * Convert channel to IEEE channel number. 852 */ 853int 854ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c) 855{ 856 if (c == NULL) { 857 if_printf(ic->ic_ifp, "invalid channel (NULL)\n"); 858 return 0; /* XXX */ 859 } 860 return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee); 861} 862 863/* 864 * Convert IEEE channel number to MHz frequency. 865 */ 866u_int 867ieee80211_ieee2mhz(u_int chan, u_int flags) 868{ 869 if (flags & IEEE80211_CHAN_GSM) 870 return 907 + 5 * (chan / 10); 871 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 872 if (chan == 14) 873 return 2484; 874 if (chan < 14) 875 return 2407 + chan*5; 876 else 877 return 2512 + ((chan-15)*20); 878 } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */ 879 if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) { 880 chan -= 37; 881 return 4940 + chan*5 + (chan % 5 ? 2 : 0); 882 } 883 return 5000 + (chan*5); 884 } else { /* either, guess */ 885 /* XXX can't distinguish PSB+GSM channels */ 886 if (chan == 14) 887 return 2484; 888 if (chan < 14) /* 0-13 */ 889 return 2407 + chan*5; 890 if (chan < 27) /* 15-26 */ 891 return 2512 + ((chan-15)*20); 892 return 5000 + (chan*5); 893 } 894} 895 896/* 897 * Locate a channel given a frequency+flags. We cache 898 * the previous lookup to optimize switching between two 899 * channels--as happens with dynamic turbo. 900 */ 901struct ieee80211_channel * 902ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags) 903{ 904 struct ieee80211_channel *c; 905 int i; 906 907 flags &= IEEE80211_CHAN_ALLTURBO; 908 c = ic->ic_prevchan; 909 if (c != NULL && c->ic_freq == freq && 910 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 911 return c; 912 /* brute force search */ 913 for (i = 0; i < ic->ic_nchans; i++) { 914 c = &ic->ic_channels[i]; 915 if (c->ic_freq == freq && 916 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 917 return c; 918 } 919 return NULL; 920} 921 922/* 923 * Locate a channel given a channel number+flags. We cache 924 * the previous lookup to optimize switching between two 925 * channels--as happens with dynamic turbo. 926 */ 927struct ieee80211_channel * 928ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags) 929{ 930 struct ieee80211_channel *c; 931 int i; 932 933 flags &= IEEE80211_CHAN_ALLTURBO; 934 c = ic->ic_prevchan; 935 if (c != NULL && c->ic_ieee == ieee && 936 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 937 return c; 938 /* brute force search */ 939 for (i = 0; i < ic->ic_nchans; i++) { 940 c = &ic->ic_channels[i]; 941 if (c->ic_ieee == ieee && 942 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 943 return c; 944 } 945 return NULL; 946} 947 948static void 949addmedia(struct ifmedia *media, int caps, int addsta, int mode, int mword) 950{ 951#define ADD(_ic, _s, _o) \ 952 ifmedia_add(media, \ 953 IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL) 954 static const u_int mopts[IEEE80211_MODE_MAX] = { 955 [IEEE80211_MODE_AUTO] = IFM_AUTO, 956 [IEEE80211_MODE_11A] = IFM_IEEE80211_11A, 957 [IEEE80211_MODE_11B] = IFM_IEEE80211_11B, 958 [IEEE80211_MODE_11G] = IFM_IEEE80211_11G, 959 [IEEE80211_MODE_FH] = IFM_IEEE80211_FH, 960 [IEEE80211_MODE_TURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO, 961 [IEEE80211_MODE_TURBO_G] = IFM_IEEE80211_11G|IFM_IEEE80211_TURBO, 962 [IEEE80211_MODE_STURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO, 963 [IEEE80211_MODE_HALF] = IFM_IEEE80211_11A, /* XXX */ 964 [IEEE80211_MODE_QUARTER] = IFM_IEEE80211_11A, /* XXX */ 965 [IEEE80211_MODE_11NA] = IFM_IEEE80211_11NA, 966 [IEEE80211_MODE_11NG] = IFM_IEEE80211_11NG, 967 }; 968 u_int mopt; 969 970 mopt = mopts[mode]; 971 if (addsta) 972 ADD(ic, mword, mopt); /* STA mode has no cap */ 973 if (caps & IEEE80211_C_IBSS) 974 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC); 975 if (caps & IEEE80211_C_HOSTAP) 976 ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP); 977 if (caps & IEEE80211_C_AHDEMO) 978 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0); 979 if (caps & IEEE80211_C_MONITOR) 980 ADD(media, mword, mopt | IFM_IEEE80211_MONITOR); 981 if (caps & IEEE80211_C_WDS) 982 ADD(media, mword, mopt | IFM_IEEE80211_WDS); 983 if (caps & IEEE80211_C_MBSS) 984 ADD(media, mword, mopt | IFM_IEEE80211_MBSS); 985#undef ADD 986} 987 988/* 989 * Setup the media data structures according to the channel and 990 * rate tables. 991 */ 992static int 993ieee80211_media_setup(struct ieee80211com *ic, 994 struct ifmedia *media, int caps, int addsta, 995 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) 996{ 997 int i, j, mode, rate, maxrate, mword, r; 998 const struct ieee80211_rateset *rs; 999 struct ieee80211_rateset allrates; 1000 1001 /* 1002 * Fill in media characteristics. 1003 */ 1004 ifmedia_init(media, 0, media_change, media_stat); 1005 maxrate = 0; 1006 /* 1007 * Add media for legacy operating modes. 1008 */ 1009 memset(&allrates, 0, sizeof(allrates)); 1010 for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) { 1011 if (isclr(ic->ic_modecaps, mode)) 1012 continue; 1013 addmedia(media, caps, addsta, mode, IFM_AUTO); 1014 if (mode == IEEE80211_MODE_AUTO) 1015 continue; 1016 rs = &ic->ic_sup_rates[mode]; 1017 for (i = 0; i < rs->rs_nrates; i++) { 1018 rate = rs->rs_rates[i]; 1019 mword = ieee80211_rate2media(ic, rate, mode); 1020 if (mword == 0) 1021 continue; 1022 addmedia(media, caps, addsta, mode, mword); 1023 /* 1024 * Add legacy rate to the collection of all rates. 1025 */ 1026 r = rate & IEEE80211_RATE_VAL; 1027 for (j = 0; j < allrates.rs_nrates; j++) 1028 if (allrates.rs_rates[j] == r) 1029 break; 1030 if (j == allrates.rs_nrates) { 1031 /* unique, add to the set */ 1032 allrates.rs_rates[j] = r; 1033 allrates.rs_nrates++; 1034 } 1035 rate = (rate & IEEE80211_RATE_VAL) / 2; 1036 if (rate > maxrate) 1037 maxrate = rate; 1038 } 1039 } 1040 for (i = 0; i < allrates.rs_nrates; i++) { 1041 mword = ieee80211_rate2media(ic, allrates.rs_rates[i], 1042 IEEE80211_MODE_AUTO); 1043 if (mword == 0) 1044 continue; 1045 /* NB: remove media options from mword */ 1046 addmedia(media, caps, addsta, 1047 IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword)); 1048 } 1049 /* 1050 * Add HT/11n media. Note that we do not have enough 1051 * bits in the media subtype to express the MCS so we 1052 * use a "placeholder" media subtype and any fixed MCS 1053 * must be specified with a different mechanism. 1054 */ 1055 for (; mode <= IEEE80211_MODE_11NG; mode++) { 1056 if (isclr(ic->ic_modecaps, mode)) 1057 continue; 1058 addmedia(media, caps, addsta, mode, IFM_AUTO); 1059 addmedia(media, caps, addsta, mode, IFM_IEEE80211_MCS); 1060 } 1061 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) || 1062 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) { 1063 addmedia(media, caps, addsta, 1064 IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS); 1065 /* XXX could walk htrates */ 1066 /* XXX known array size */ 1067 if (ieee80211_htrates[15].ht40_rate_400ns > maxrate) 1068 maxrate = ieee80211_htrates[15].ht40_rate_400ns; 1069 } 1070 return maxrate; 1071} 1072 1073void 1074ieee80211_media_init(struct ieee80211com *ic) 1075{ 1076 struct ifnet *ifp = ic->ic_ifp; 1077 int maxrate; 1078 1079 /* NB: this works because the structure is initialized to zero */ 1080 if (!LIST_EMPTY(&ic->ic_media.ifm_list)) { 1081 /* 1082 * We are re-initializing the channel list; clear 1083 * the existing media state as the media routines 1084 * don't suppress duplicates. 1085 */ 1086 ifmedia_removeall(&ic->ic_media); 1087 } 1088 ieee80211_chan_init(ic); 1089 1090 /* 1091 * Recalculate media settings in case new channel list changes 1092 * the set of available modes. 1093 */ 1094 maxrate = ieee80211_media_setup(ic, &ic->ic_media, ic->ic_caps, 1, 1095 ieee80211com_media_change, ieee80211com_media_status); 1096 /* NB: strip explicit mode; we're actually in autoselect */ 1097 ifmedia_set(&ic->ic_media, 1098 media_status(ic->ic_opmode, ic->ic_curchan) &~ 1099 (IFM_MMASK | IFM_IEEE80211_TURBO)); 1100 if (maxrate) 1101 ifp->if_baudrate = IF_Mbps(maxrate); 1102 1103 /* XXX need to propagate new media settings to vap's */ 1104} 1105 1106/* XXX inline or eliminate? */ 1107const struct ieee80211_rateset * 1108ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c) 1109{ 1110 /* XXX does this work for 11ng basic rates? */ 1111 return &ic->ic_sup_rates[ieee80211_chan2mode(c)]; 1112} 1113 1114void 1115ieee80211_announce(struct ieee80211com *ic) 1116{ 1117 struct ifnet *ifp = ic->ic_ifp; 1118 int i, mode, rate, mword; 1119 const struct ieee80211_rateset *rs; 1120 1121 /* NB: skip AUTO since it has no rates */ 1122 for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) { 1123 if (isclr(ic->ic_modecaps, mode)) 1124 continue; 1125 if_printf(ifp, "%s rates: ", ieee80211_phymode_name[mode]); 1126 rs = &ic->ic_sup_rates[mode]; 1127 for (i = 0; i < rs->rs_nrates; i++) { 1128 mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode); 1129 if (mword == 0) 1130 continue; 1131 rate = ieee80211_media2rate(mword); 1132 printf("%s%d%sMbps", (i != 0 ? " " : ""), 1133 rate / 2, ((rate & 0x1) != 0 ? ".5" : "")); 1134 } 1135 printf("\n"); 1136 } 1137 ieee80211_ht_announce(ic); 1138} 1139 1140void 1141ieee80211_announce_channels(struct ieee80211com *ic) 1142{ 1143 const struct ieee80211_channel *c; 1144 char type; 1145 int i, cw; 1146 1147 printf("Chan Freq CW RegPwr MinPwr MaxPwr\n"); 1148 for (i = 0; i < ic->ic_nchans; i++) { 1149 c = &ic->ic_channels[i]; 1150 if (IEEE80211_IS_CHAN_ST(c)) 1151 type = 'S'; 1152 else if (IEEE80211_IS_CHAN_108A(c)) 1153 type = 'T'; 1154 else if (IEEE80211_IS_CHAN_108G(c)) 1155 type = 'G'; 1156 else if (IEEE80211_IS_CHAN_HT(c)) 1157 type = 'n'; 1158 else if (IEEE80211_IS_CHAN_A(c)) 1159 type = 'a'; 1160 else if (IEEE80211_IS_CHAN_ANYG(c)) 1161 type = 'g'; 1162 else if (IEEE80211_IS_CHAN_B(c)) 1163 type = 'b'; 1164 else 1165 type = 'f'; 1166 if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c)) 1167 cw = 40; 1168 else if (IEEE80211_IS_CHAN_HALF(c)) 1169 cw = 10; 1170 else if (IEEE80211_IS_CHAN_QUARTER(c)) 1171 cw = 5; 1172 else 1173 cw = 20; 1174 printf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n" 1175 , c->ic_ieee, c->ic_freq, type 1176 , cw 1177 , IEEE80211_IS_CHAN_HT40U(c) ? '+' : 1178 IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' ' 1179 , c->ic_maxregpower 1180 , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0 1181 , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0 1182 ); 1183 } 1184} 1185 1186static int 1187media2mode(const struct ifmedia_entry *ime, uint32_t flags, uint16_t *mode) 1188{ 1189 switch (IFM_MODE(ime->ifm_media)) { 1190 case IFM_IEEE80211_11A: 1191 *mode = IEEE80211_MODE_11A; 1192 break; 1193 case IFM_IEEE80211_11B: 1194 *mode = IEEE80211_MODE_11B; 1195 break; 1196 case IFM_IEEE80211_11G: 1197 *mode = IEEE80211_MODE_11G; 1198 break; 1199 case IFM_IEEE80211_FH: 1200 *mode = IEEE80211_MODE_FH; 1201 break; 1202 case IFM_IEEE80211_11NA: 1203 *mode = IEEE80211_MODE_11NA; 1204 break; 1205 case IFM_IEEE80211_11NG: 1206 *mode = IEEE80211_MODE_11NG; 1207 break; 1208 case IFM_AUTO: 1209 *mode = IEEE80211_MODE_AUTO; 1210 break; 1211 default: 1212 return 0; 1213 } 1214 /* 1215 * Turbo mode is an ``option''. 1216 * XXX does not apply to AUTO 1217 */ 1218 if (ime->ifm_media & IFM_IEEE80211_TURBO) { 1219 if (*mode == IEEE80211_MODE_11A) { 1220 if (flags & IEEE80211_F_TURBOP) 1221 *mode = IEEE80211_MODE_TURBO_A; 1222 else 1223 *mode = IEEE80211_MODE_STURBO_A; 1224 } else if (*mode == IEEE80211_MODE_11G) 1225 *mode = IEEE80211_MODE_TURBO_G; 1226 else 1227 return 0; 1228 } 1229 /* XXX HT40 +/- */ 1230 return 1; 1231} 1232 1233/* 1234 * Handle a media change request on the underlying interface. 1235 */ 1236int 1237ieee80211com_media_change(struct ifnet *ifp) 1238{ 1239 return EINVAL; 1240} 1241 1242/* 1243 * Handle a media change request on the vap interface. 1244 */ 1245int 1246ieee80211_media_change(struct ifnet *ifp) 1247{ 1248 struct ieee80211vap *vap = ifp->if_softc; 1249 struct ifmedia_entry *ime = vap->iv_media.ifm_cur; 1250 uint16_t newmode; 1251 1252 if (!media2mode(ime, vap->iv_flags, &newmode)) 1253 return EINVAL; 1254 if (vap->iv_des_mode != newmode) { 1255 vap->iv_des_mode = newmode; 1256 /* XXX kick state machine if up+running */ 1257 } 1258 return 0; 1259} 1260 1261/* 1262 * Common code to calculate the media status word 1263 * from the operating mode and channel state. 1264 */ 1265static int 1266media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan) 1267{ 1268 int status; 1269 1270 status = IFM_IEEE80211; 1271 switch (opmode) { 1272 case IEEE80211_M_STA: 1273 break; 1274 case IEEE80211_M_IBSS: 1275 status |= IFM_IEEE80211_ADHOC; 1276 break; 1277 case IEEE80211_M_HOSTAP: 1278 status |= IFM_IEEE80211_HOSTAP; 1279 break; 1280 case IEEE80211_M_MONITOR: 1281 status |= IFM_IEEE80211_MONITOR; 1282 break; 1283 case IEEE80211_M_AHDEMO: 1284 status |= IFM_IEEE80211_ADHOC | IFM_FLAG0; 1285 break; 1286 case IEEE80211_M_WDS: 1287 status |= IFM_IEEE80211_WDS; 1288 break; 1289 case IEEE80211_M_MBSS: 1290 status |= IFM_IEEE80211_MBSS; 1291 break; 1292 } 1293 if (IEEE80211_IS_CHAN_HTA(chan)) { 1294 status |= IFM_IEEE80211_11NA; 1295 } else if (IEEE80211_IS_CHAN_HTG(chan)) { 1296 status |= IFM_IEEE80211_11NG; 1297 } else if (IEEE80211_IS_CHAN_A(chan)) { 1298 status |= IFM_IEEE80211_11A; 1299 } else if (IEEE80211_IS_CHAN_B(chan)) { 1300 status |= IFM_IEEE80211_11B; 1301 } else if (IEEE80211_IS_CHAN_ANYG(chan)) { 1302 status |= IFM_IEEE80211_11G; 1303 } else if (IEEE80211_IS_CHAN_FHSS(chan)) { 1304 status |= IFM_IEEE80211_FH; 1305 } 1306 /* XXX else complain? */ 1307 1308 if (IEEE80211_IS_CHAN_TURBO(chan)) 1309 status |= IFM_IEEE80211_TURBO; 1310#if 0 1311 if (IEEE80211_IS_CHAN_HT20(chan)) 1312 status |= IFM_IEEE80211_HT20; 1313 if (IEEE80211_IS_CHAN_HT40(chan)) 1314 status |= IFM_IEEE80211_HT40; 1315#endif 1316 return status; 1317} 1318 1319static void 1320ieee80211com_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1321{ 1322 struct ieee80211com *ic = ifp->if_l2com; 1323 struct ieee80211vap *vap; 1324 1325 imr->ifm_status = IFM_AVALID; 1326 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1327 if (vap->iv_ifp->if_flags & IFF_UP) { 1328 imr->ifm_status |= IFM_ACTIVE; 1329 break; 1330 } 1331 imr->ifm_active = media_status(ic->ic_opmode, ic->ic_curchan); 1332 if (imr->ifm_status & IFM_ACTIVE) 1333 imr->ifm_current = imr->ifm_active; 1334} 1335 1336void 1337ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1338{ 1339 struct ieee80211vap *vap = ifp->if_softc; 1340 struct ieee80211com *ic = vap->iv_ic; 1341 enum ieee80211_phymode mode; 1342 1343 imr->ifm_status = IFM_AVALID; 1344 /* 1345 * NB: use the current channel's mode to lock down a xmit 1346 * rate only when running; otherwise we may have a mismatch 1347 * in which case the rate will not be convertible. 1348 */ 1349 if (vap->iv_state == IEEE80211_S_RUN) { 1350 imr->ifm_status |= IFM_ACTIVE; 1351 mode = ieee80211_chan2mode(ic->ic_curchan); 1352 } else 1353 mode = IEEE80211_MODE_AUTO; 1354 imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan); 1355 /* 1356 * Calculate a current rate if possible. 1357 */ 1358 if (vap->iv_txparms[mode].ucastrate != IEEE80211_FIXED_RATE_NONE) { 1359 /* 1360 * A fixed rate is set, report that. 1361 */ 1362 imr->ifm_active |= ieee80211_rate2media(ic, 1363 vap->iv_txparms[mode].ucastrate, mode); 1364 } else if (vap->iv_opmode == IEEE80211_M_STA) { 1365 /* 1366 * In station mode report the current transmit rate. 1367 */ 1368 imr->ifm_active |= ieee80211_rate2media(ic, 1369 vap->iv_bss->ni_txrate, mode); 1370 } else 1371 imr->ifm_active |= IFM_AUTO; 1372 if (imr->ifm_status & IFM_ACTIVE) 1373 imr->ifm_current = imr->ifm_active; 1374} 1375 1376/* 1377 * Set the current phy mode and recalculate the active channel 1378 * set based on the available channels for this mode. Also 1379 * select a new default/current channel if the current one is 1380 * inappropriate for this mode. 1381 */ 1382int 1383ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode) 1384{ 1385 /* 1386 * Adjust basic rates in 11b/11g supported rate set. 1387 * Note that if operating on a hal/quarter rate channel 1388 * this is a noop as those rates sets are different 1389 * and used instead. 1390 */ 1391 if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B) 1392 ieee80211_setbasicrates(&ic->ic_sup_rates[mode], mode); 1393 1394 ic->ic_curmode = mode; 1395 ieee80211_reset_erp(ic); /* reset ERP state */ 1396 1397 return 0; 1398} 1399 1400/* 1401 * Return the phy mode for with the specified channel. 1402 */ 1403enum ieee80211_phymode 1404ieee80211_chan2mode(const struct ieee80211_channel *chan) 1405{ 1406 1407 if (IEEE80211_IS_CHAN_HTA(chan)) 1408 return IEEE80211_MODE_11NA; 1409 else if (IEEE80211_IS_CHAN_HTG(chan)) 1410 return IEEE80211_MODE_11NG; 1411 else if (IEEE80211_IS_CHAN_108G(chan)) 1412 return IEEE80211_MODE_TURBO_G; 1413 else if (IEEE80211_IS_CHAN_ST(chan)) 1414 return IEEE80211_MODE_STURBO_A; 1415 else if (IEEE80211_IS_CHAN_TURBO(chan)) 1416 return IEEE80211_MODE_TURBO_A; 1417 else if (IEEE80211_IS_CHAN_HALF(chan)) 1418 return IEEE80211_MODE_HALF; 1419 else if (IEEE80211_IS_CHAN_QUARTER(chan)) 1420 return IEEE80211_MODE_QUARTER; 1421 else if (IEEE80211_IS_CHAN_A(chan)) 1422 return IEEE80211_MODE_11A; 1423 else if (IEEE80211_IS_CHAN_ANYG(chan)) 1424 return IEEE80211_MODE_11G; 1425 else if (IEEE80211_IS_CHAN_B(chan)) 1426 return IEEE80211_MODE_11B; 1427 else if (IEEE80211_IS_CHAN_FHSS(chan)) 1428 return IEEE80211_MODE_FH; 1429 1430 /* NB: should not get here */ 1431 printf("%s: cannot map channel to mode; freq %u flags 0x%x\n", 1432 __func__, chan->ic_freq, chan->ic_flags); 1433 return IEEE80211_MODE_11B; 1434} 1435 1436struct ratemedia { 1437 u_int match; /* rate + mode */ 1438 u_int media; /* if_media rate */ 1439}; 1440 1441static int 1442findmedia(const struct ratemedia rates[], int n, u_int match) 1443{ 1444 int i; 1445 1446 for (i = 0; i < n; i++) 1447 if (rates[i].match == match) 1448 return rates[i].media; 1449 return IFM_AUTO; 1450} 1451 1452/* 1453 * Convert IEEE80211 rate value to ifmedia subtype. 1454 * Rate is either a legacy rate in units of 0.5Mbps 1455 * or an MCS index. 1456 */ 1457int 1458ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode) 1459{ 1460#define N(a) (sizeof(a) / sizeof(a[0])) 1461 static const struct ratemedia rates[] = { 1462 { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 }, 1463 { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 }, 1464 { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 }, 1465 { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 }, 1466 { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 }, 1467 { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 }, 1468 { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 }, 1469 { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 }, 1470 { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 }, 1471 { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 }, 1472 { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 }, 1473 { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 }, 1474 { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 }, 1475 { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 }, 1476 { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 }, 1477 { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 }, 1478 { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 }, 1479 { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 }, 1480 { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 }, 1481 { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 }, 1482 { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 }, 1483 { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 }, 1484 { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 }, 1485 { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 }, 1486 { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 }, 1487 { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 }, 1488 { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 }, 1489 { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 }, 1490 { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 }, 1491 { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 }, 1492 /* NB: OFDM72 doesn't realy exist so we don't handle it */ 1493 }; 1494 static const struct ratemedia htrates[] = { 1495 { 0, IFM_IEEE80211_MCS }, 1496 { 1, IFM_IEEE80211_MCS }, 1497 { 2, IFM_IEEE80211_MCS }, 1498 { 3, IFM_IEEE80211_MCS }, 1499 { 4, IFM_IEEE80211_MCS }, 1500 { 5, IFM_IEEE80211_MCS }, 1501 { 6, IFM_IEEE80211_MCS }, 1502 { 7, IFM_IEEE80211_MCS }, 1503 { 8, IFM_IEEE80211_MCS }, 1504 { 9, IFM_IEEE80211_MCS }, 1505 { 10, IFM_IEEE80211_MCS }, 1506 { 11, IFM_IEEE80211_MCS }, 1507 { 12, IFM_IEEE80211_MCS }, 1508 { 13, IFM_IEEE80211_MCS }, 1509 { 14, IFM_IEEE80211_MCS }, 1510 { 15, IFM_IEEE80211_MCS }, 1511 }; 1512 int m; 1513 1514 /* 1515 * Check 11n rates first for match as an MCS. 1516 */ 1517 if (mode == IEEE80211_MODE_11NA) { 1518 if (rate & IEEE80211_RATE_MCS) { 1519 rate &= ~IEEE80211_RATE_MCS; 1520 m = findmedia(htrates, N(htrates), rate); 1521 if (m != IFM_AUTO) 1522 return m | IFM_IEEE80211_11NA; 1523 } 1524 } else if (mode == IEEE80211_MODE_11NG) { 1525 /* NB: 12 is ambiguous, it will be treated as an MCS */ 1526 if (rate & IEEE80211_RATE_MCS) { 1527 rate &= ~IEEE80211_RATE_MCS; 1528 m = findmedia(htrates, N(htrates), rate); 1529 if (m != IFM_AUTO) 1530 return m | IFM_IEEE80211_11NG; 1531 } 1532 } 1533 rate &= IEEE80211_RATE_VAL; 1534 switch (mode) { 1535 case IEEE80211_MODE_11A: 1536 case IEEE80211_MODE_HALF: /* XXX good 'nuf */ 1537 case IEEE80211_MODE_QUARTER: 1538 case IEEE80211_MODE_11NA: 1539 case IEEE80211_MODE_TURBO_A: 1540 case IEEE80211_MODE_STURBO_A: 1541 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11A); 1542 case IEEE80211_MODE_11B: 1543 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11B); 1544 case IEEE80211_MODE_FH: 1545 return findmedia(rates, N(rates), rate | IFM_IEEE80211_FH); 1546 case IEEE80211_MODE_AUTO: 1547 /* NB: ic may be NULL for some drivers */ 1548 if (ic != NULL && ic->ic_phytype == IEEE80211_T_FH) 1549 return findmedia(rates, N(rates), 1550 rate | IFM_IEEE80211_FH); 1551 /* NB: hack, 11g matches both 11b+11a rates */ 1552 /* fall thru... */ 1553 case IEEE80211_MODE_11G: 1554 case IEEE80211_MODE_11NG: 1555 case IEEE80211_MODE_TURBO_G: 1556 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11G); 1557 } 1558 return IFM_AUTO; 1559#undef N 1560} 1561 1562int 1563ieee80211_media2rate(int mword) 1564{ 1565#define N(a) (sizeof(a) / sizeof(a[0])) 1566 static const int ieeerates[] = { 1567 -1, /* IFM_AUTO */ 1568 0, /* IFM_MANUAL */ 1569 0, /* IFM_NONE */ 1570 2, /* IFM_IEEE80211_FH1 */ 1571 4, /* IFM_IEEE80211_FH2 */ 1572 2, /* IFM_IEEE80211_DS1 */ 1573 4, /* IFM_IEEE80211_DS2 */ 1574 11, /* IFM_IEEE80211_DS5 */ 1575 22, /* IFM_IEEE80211_DS11 */ 1576 44, /* IFM_IEEE80211_DS22 */ 1577 12, /* IFM_IEEE80211_OFDM6 */ 1578 18, /* IFM_IEEE80211_OFDM9 */ 1579 24, /* IFM_IEEE80211_OFDM12 */ 1580 36, /* IFM_IEEE80211_OFDM18 */ 1581 48, /* IFM_IEEE80211_OFDM24 */ 1582 72, /* IFM_IEEE80211_OFDM36 */ 1583 96, /* IFM_IEEE80211_OFDM48 */ 1584 108, /* IFM_IEEE80211_OFDM54 */ 1585 144, /* IFM_IEEE80211_OFDM72 */ 1586 0, /* IFM_IEEE80211_DS354k */ 1587 0, /* IFM_IEEE80211_DS512k */ 1588 6, /* IFM_IEEE80211_OFDM3 */ 1589 9, /* IFM_IEEE80211_OFDM4 */ 1590 54, /* IFM_IEEE80211_OFDM27 */ 1591 -1, /* IFM_IEEE80211_MCS */ 1592 }; 1593 return IFM_SUBTYPE(mword) < N(ieeerates) ? 1594 ieeerates[IFM_SUBTYPE(mword)] : 0; 1595#undef N 1596} 1597 1598/* 1599 * The following hash function is adapted from "Hash Functions" by Bob Jenkins 1600 * ("Algorithm Alley", Dr. Dobbs Journal, September 1997). 1601 */ 1602#define mix(a, b, c) \ 1603do { \ 1604 a -= b; a -= c; a ^= (c >> 13); \ 1605 b -= c; b -= a; b ^= (a << 8); \ 1606 c -= a; c -= b; c ^= (b >> 13); \ 1607 a -= b; a -= c; a ^= (c >> 12); \ 1608 b -= c; b -= a; b ^= (a << 16); \ 1609 c -= a; c -= b; c ^= (b >> 5); \ 1610 a -= b; a -= c; a ^= (c >> 3); \ 1611 b -= c; b -= a; b ^= (a << 10); \ 1612 c -= a; c -= b; c ^= (b >> 15); \ 1613} while (/*CONSTCOND*/0) 1614 1615uint32_t 1616ieee80211_mac_hash(const struct ieee80211com *ic, 1617 const uint8_t addr[IEEE80211_ADDR_LEN]) 1618{ 1619 uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = ic->ic_hash_key; 1620 1621 b += addr[5] << 8; 1622 b += addr[4]; 1623 a += addr[3] << 24; 1624 a += addr[2] << 16; 1625 a += addr[1] << 8; 1626 a += addr[0]; 1627 1628 mix(a, b, c); 1629 1630 return c; 1631} 1632#undef mix 1633