ieee80211.c revision 205513
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 205513 2010-03-23 12:03:09Z rpaulo $"); 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_init = ieee80211_init; 395 /* NB: input+output filled in by ether_ifattach */ 396 IFQ_SET_MAXLEN(&ifp->if_snd, IFQ_MAXLEN); 397 ifp->if_snd.ifq_drv_maxlen = IFQ_MAXLEN; 398 IFQ_SET_READY(&ifp->if_snd); 399 400 vap->iv_ifp = ifp; 401 vap->iv_ic = ic; 402 vap->iv_flags = ic->ic_flags; /* propagate common flags */ 403 vap->iv_flags_ext = ic->ic_flags_ext; 404 vap->iv_flags_ven = ic->ic_flags_ven; 405 vap->iv_caps = ic->ic_caps &~ IEEE80211_C_OPMODE; 406 vap->iv_htcaps = ic->ic_htcaps; 407 vap->iv_htextcaps = ic->ic_htextcaps; 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 /* auto-generated or user supplied MAC address */ 445 if (flags & (IEEE80211_CLONE_BSSID|IEEE80211_CLONE_MACADDR)) 446 vap->iv_flags_ext |= IEEE80211_FEXT_UNIQMAC; 447 /* 448 * Enable various functionality by default if we're 449 * capable; the driver can override us if it knows better. 450 */ 451 if (vap->iv_caps & IEEE80211_C_WME) 452 vap->iv_flags |= IEEE80211_F_WME; 453 if (vap->iv_caps & IEEE80211_C_BURST) 454 vap->iv_flags |= IEEE80211_F_BURST; 455 /* NB: bg scanning only makes sense for station mode right now */ 456 if (vap->iv_opmode == IEEE80211_M_STA && 457 (vap->iv_caps & IEEE80211_C_BGSCAN)) 458 vap->iv_flags |= IEEE80211_F_BGSCAN; 459 vap->iv_flags |= IEEE80211_F_DOTH; /* XXX no cap, just ena */ 460 /* NB: DFS support only makes sense for ap mode right now */ 461 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 462 (vap->iv_caps & IEEE80211_C_DFS)) 463 vap->iv_flags_ext |= IEEE80211_FEXT_DFS; 464 465 vap->iv_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */ 466 vap->iv_bmissthreshold = IEEE80211_HWBMISS_DEFAULT; 467 vap->iv_dtim_period = IEEE80211_DTIM_DEFAULT; 468 /* 469 * Install a default reset method for the ioctl support; 470 * the driver can override this. 471 */ 472 vap->iv_reset = default_reset; 473 474 IEEE80211_ADDR_COPY(vap->iv_myaddr, macaddr); 475 476 ieee80211_sysctl_vattach(vap); 477 ieee80211_crypto_vattach(vap); 478 ieee80211_node_vattach(vap); 479 ieee80211_power_vattach(vap); 480 ieee80211_proto_vattach(vap); 481#ifdef IEEE80211_SUPPORT_SUPERG 482 ieee80211_superg_vattach(vap); 483#endif 484 ieee80211_ht_vattach(vap); 485 ieee80211_scan_vattach(vap); 486 ieee80211_regdomain_vattach(vap); 487 ieee80211_radiotap_vattach(vap); 488 489 return 0; 490} 491 492/* 493 * Activate a vap. State should have been prepared with a 494 * call to ieee80211_vap_setup and by the driver. On return 495 * from this call the vap is ready for use. 496 */ 497int 498ieee80211_vap_attach(struct ieee80211vap *vap, 499 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) 500{ 501 struct ifnet *ifp = vap->iv_ifp; 502 struct ieee80211com *ic = vap->iv_ic; 503 struct ifmediareq imr; 504 int maxrate; 505 506 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 507 "%s: %s parent %s flags 0x%x flags_ext 0x%x\n", 508 __func__, ieee80211_opmode_name[vap->iv_opmode], 509 ic->ic_ifp->if_xname, vap->iv_flags, vap->iv_flags_ext); 510 511 /* 512 * Do late attach work that cannot happen until after 513 * the driver has had a chance to override defaults. 514 */ 515 ieee80211_node_latevattach(vap); 516 ieee80211_power_latevattach(vap); 517 518 maxrate = ieee80211_media_setup(ic, &vap->iv_media, vap->iv_caps, 519 vap->iv_opmode == IEEE80211_M_STA, media_change, media_stat); 520 ieee80211_media_status(ifp, &imr); 521 /* NB: strip explicit mode; we're actually in autoselect */ 522 ifmedia_set(&vap->iv_media, 523 imr.ifm_active &~ (IFM_MMASK | IFM_IEEE80211_TURBO)); 524 if (maxrate) 525 ifp->if_baudrate = IF_Mbps(maxrate); 526 527 ether_ifattach(ifp, vap->iv_myaddr); 528 if (vap->iv_opmode == IEEE80211_M_MONITOR) { 529 /* NB: disallow transmit */ 530 ifp->if_transmit = null_transmit; 531 ifp->if_output = null_output; 532 } else { 533 /* hook output method setup by ether_ifattach */ 534 vap->iv_output = ifp->if_output; 535 ifp->if_output = ieee80211_output; 536 } 537 /* NB: if_mtu set by ether_ifattach to ETHERMTU */ 538 539 IEEE80211_LOCK(ic); 540 TAILQ_INSERT_TAIL(&ic->ic_vaps, vap, iv_next); 541 ieee80211_syncflag_locked(ic, IEEE80211_F_WME); 542#ifdef IEEE80211_SUPPORT_SUPERG 543 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); 544#endif 545 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); 546 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); 547 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT); 548 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40); 549 ieee80211_syncifflag_locked(ic, IFF_PROMISC); 550 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI); 551 IEEE80211_UNLOCK(ic); 552 553 return 1; 554} 555 556/* 557 * Tear down vap state and reclaim the ifnet. 558 * The driver is assumed to have prepared for 559 * this; e.g. by turning off interrupts for the 560 * underlying device. 561 */ 562void 563ieee80211_vap_detach(struct ieee80211vap *vap) 564{ 565 struct ieee80211com *ic = vap->iv_ic; 566 struct ifnet *ifp = vap->iv_ifp; 567 568 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s parent %s\n", 569 __func__, ieee80211_opmode_name[vap->iv_opmode], 570 ic->ic_ifp->if_xname); 571 572 /* NB: bpfdetach is called by ether_ifdetach and claims all taps */ 573 ether_ifdetach(ifp); 574 575 ieee80211_stop(vap); 576 577 /* 578 * Flush any deferred vap tasks. 579 */ 580 ieee80211_draintask(ic, &vap->iv_nstate_task); 581 ieee80211_draintask(ic, &vap->iv_swbmiss_task); 582 583 /* XXX band-aid until ifnet handles this for us */ 584 taskqueue_drain(taskqueue_swi, &ifp->if_linktask); 585 586 IEEE80211_LOCK(ic); 587 KASSERT(vap->iv_state == IEEE80211_S_INIT , ("vap still running")); 588 TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next); 589 ieee80211_syncflag_locked(ic, IEEE80211_F_WME); 590#ifdef IEEE80211_SUPPORT_SUPERG 591 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); 592#endif 593 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); 594 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); 595 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT); 596 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40); 597 /* NB: this handles the bpfdetach done below */ 598 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_BPF); 599 ieee80211_syncifflag_locked(ic, IFF_PROMISC); 600 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI); 601 IEEE80211_UNLOCK(ic); 602 603 ifmedia_removeall(&vap->iv_media); 604 605 ieee80211_radiotap_vdetach(vap); 606 ieee80211_regdomain_vdetach(vap); 607 ieee80211_scan_vdetach(vap); 608#ifdef IEEE80211_SUPPORT_SUPERG 609 ieee80211_superg_vdetach(vap); 610#endif 611 ieee80211_ht_vdetach(vap); 612 /* NB: must be before ieee80211_node_vdetach */ 613 ieee80211_proto_vdetach(vap); 614 ieee80211_crypto_vdetach(vap); 615 ieee80211_power_vdetach(vap); 616 ieee80211_node_vdetach(vap); 617 ieee80211_sysctl_vdetach(vap); 618 619 if_free(ifp); 620} 621 622/* 623 * Synchronize flag bit state in the parent ifnet structure 624 * according to the state of all vap ifnet's. This is used, 625 * for example, to handle IFF_PROMISC and IFF_ALLMULTI. 626 */ 627void 628ieee80211_syncifflag_locked(struct ieee80211com *ic, int flag) 629{ 630 struct ifnet *ifp = ic->ic_ifp; 631 struct ieee80211vap *vap; 632 int bit, oflags; 633 634 IEEE80211_LOCK_ASSERT(ic); 635 636 bit = 0; 637 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 638 if (vap->iv_ifp->if_flags & flag) { 639 /* 640 * XXX the bridge sets PROMISC but we don't want to 641 * enable it on the device, discard here so all the 642 * drivers don't need to special-case it 643 */ 644 if (flag == IFF_PROMISC && 645 !(vap->iv_opmode == IEEE80211_M_MONITOR || 646 (vap->iv_opmode == IEEE80211_M_AHDEMO && 647 (vap->iv_caps & IEEE80211_C_TDMA) == 0))) 648 continue; 649 bit = 1; 650 break; 651 } 652 oflags = ifp->if_flags; 653 if (bit) 654 ifp->if_flags |= flag; 655 else 656 ifp->if_flags &= ~flag; 657 if ((ifp->if_flags ^ oflags) & flag) { 658 /* XXX should we return 1/0 and let caller do this? */ 659 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 660 if (flag == IFF_PROMISC) 661 ieee80211_runtask(ic, &ic->ic_promisc_task); 662 else if (flag == IFF_ALLMULTI) 663 ieee80211_runtask(ic, &ic->ic_mcast_task); 664 } 665 } 666} 667 668/* 669 * Synchronize flag bit state in the com structure 670 * according to the state of all vap's. This is used, 671 * for example, to handle state changes via ioctls. 672 */ 673static void 674ieee80211_syncflag_locked(struct ieee80211com *ic, int flag) 675{ 676 struct ieee80211vap *vap; 677 int bit; 678 679 IEEE80211_LOCK_ASSERT(ic); 680 681 bit = 0; 682 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 683 if (vap->iv_flags & flag) { 684 bit = 1; 685 break; 686 } 687 if (bit) 688 ic->ic_flags |= flag; 689 else 690 ic->ic_flags &= ~flag; 691} 692 693void 694ieee80211_syncflag(struct ieee80211vap *vap, int flag) 695{ 696 struct ieee80211com *ic = vap->iv_ic; 697 698 IEEE80211_LOCK(ic); 699 if (flag < 0) { 700 flag = -flag; 701 vap->iv_flags &= ~flag; 702 } else 703 vap->iv_flags |= flag; 704 ieee80211_syncflag_locked(ic, flag); 705 IEEE80211_UNLOCK(ic); 706} 707 708/* 709 * Synchronize flags_ht bit state in the com structure 710 * according to the state of all vap's. This is used, 711 * for example, to handle state changes via ioctls. 712 */ 713static void 714ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag) 715{ 716 struct ieee80211vap *vap; 717 int bit; 718 719 IEEE80211_LOCK_ASSERT(ic); 720 721 bit = 0; 722 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 723 if (vap->iv_flags_ht & flag) { 724 bit = 1; 725 break; 726 } 727 if (bit) 728 ic->ic_flags_ht |= flag; 729 else 730 ic->ic_flags_ht &= ~flag; 731} 732 733void 734ieee80211_syncflag_ht(struct ieee80211vap *vap, int flag) 735{ 736 struct ieee80211com *ic = vap->iv_ic; 737 738 IEEE80211_LOCK(ic); 739 if (flag < 0) { 740 flag = -flag; 741 vap->iv_flags_ht &= ~flag; 742 } else 743 vap->iv_flags_ht |= flag; 744 ieee80211_syncflag_ht_locked(ic, flag); 745 IEEE80211_UNLOCK(ic); 746} 747 748/* 749 * Synchronize flags_ext bit state in the com structure 750 * according to the state of all vap's. This is used, 751 * for example, to handle state changes via ioctls. 752 */ 753static void 754ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag) 755{ 756 struct ieee80211vap *vap; 757 int bit; 758 759 IEEE80211_LOCK_ASSERT(ic); 760 761 bit = 0; 762 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 763 if (vap->iv_flags_ext & flag) { 764 bit = 1; 765 break; 766 } 767 if (bit) 768 ic->ic_flags_ext |= flag; 769 else 770 ic->ic_flags_ext &= ~flag; 771} 772 773void 774ieee80211_syncflag_ext(struct ieee80211vap *vap, int flag) 775{ 776 struct ieee80211com *ic = vap->iv_ic; 777 778 IEEE80211_LOCK(ic); 779 if (flag < 0) { 780 flag = -flag; 781 vap->iv_flags_ext &= ~flag; 782 } else 783 vap->iv_flags_ext |= flag; 784 ieee80211_syncflag_ext_locked(ic, flag); 785 IEEE80211_UNLOCK(ic); 786} 787 788static __inline int 789mapgsm(u_int freq, u_int flags) 790{ 791 freq *= 10; 792 if (flags & IEEE80211_CHAN_QUARTER) 793 freq += 5; 794 else if (flags & IEEE80211_CHAN_HALF) 795 freq += 10; 796 else 797 freq += 20; 798 /* NB: there is no 907/20 wide but leave room */ 799 return (freq - 906*10) / 5; 800} 801 802static __inline int 803mappsb(u_int freq, u_int flags) 804{ 805 return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5; 806} 807 808/* 809 * Convert MHz frequency to IEEE channel number. 810 */ 811int 812ieee80211_mhz2ieee(u_int freq, u_int flags) 813{ 814#define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990) 815 if (flags & IEEE80211_CHAN_GSM) 816 return mapgsm(freq, flags); 817 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 818 if (freq == 2484) 819 return 14; 820 if (freq < 2484) 821 return ((int) freq - 2407) / 5; 822 else 823 return 15 + ((freq - 2512) / 20); 824 } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */ 825 if (freq <= 5000) { 826 /* XXX check regdomain? */ 827 if (IS_FREQ_IN_PSB(freq)) 828 return mappsb(freq, flags); 829 return (freq - 4000) / 5; 830 } else 831 return (freq - 5000) / 5; 832 } else { /* either, guess */ 833 if (freq == 2484) 834 return 14; 835 if (freq < 2484) { 836 if (907 <= freq && freq <= 922) 837 return mapgsm(freq, flags); 838 return ((int) freq - 2407) / 5; 839 } 840 if (freq < 5000) { 841 if (IS_FREQ_IN_PSB(freq)) 842 return mappsb(freq, flags); 843 else if (freq > 4900) 844 return (freq - 4000) / 5; 845 else 846 return 15 + ((freq - 2512) / 20); 847 } 848 return (freq - 5000) / 5; 849 } 850#undef IS_FREQ_IN_PSB 851} 852 853/* 854 * Convert channel to IEEE channel number. 855 */ 856int 857ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c) 858{ 859 if (c == NULL) { 860 if_printf(ic->ic_ifp, "invalid channel (NULL)\n"); 861 return 0; /* XXX */ 862 } 863 return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee); 864} 865 866/* 867 * Convert IEEE channel number to MHz frequency. 868 */ 869u_int 870ieee80211_ieee2mhz(u_int chan, u_int flags) 871{ 872 if (flags & IEEE80211_CHAN_GSM) 873 return 907 + 5 * (chan / 10); 874 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 875 if (chan == 14) 876 return 2484; 877 if (chan < 14) 878 return 2407 + chan*5; 879 else 880 return 2512 + ((chan-15)*20); 881 } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */ 882 if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) { 883 chan -= 37; 884 return 4940 + chan*5 + (chan % 5 ? 2 : 0); 885 } 886 return 5000 + (chan*5); 887 } else { /* either, guess */ 888 /* XXX can't distinguish PSB+GSM channels */ 889 if (chan == 14) 890 return 2484; 891 if (chan < 14) /* 0-13 */ 892 return 2407 + chan*5; 893 if (chan < 27) /* 15-26 */ 894 return 2512 + ((chan-15)*20); 895 return 5000 + (chan*5); 896 } 897} 898 899/* 900 * Locate a channel given a frequency+flags. We cache 901 * the previous lookup to optimize switching between two 902 * channels--as happens with dynamic turbo. 903 */ 904struct ieee80211_channel * 905ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags) 906{ 907 struct ieee80211_channel *c; 908 int i; 909 910 flags &= IEEE80211_CHAN_ALLTURBO; 911 c = ic->ic_prevchan; 912 if (c != NULL && c->ic_freq == freq && 913 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 914 return c; 915 /* brute force search */ 916 for (i = 0; i < ic->ic_nchans; i++) { 917 c = &ic->ic_channels[i]; 918 if (c->ic_freq == freq && 919 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 920 return c; 921 } 922 return NULL; 923} 924 925/* 926 * Locate a channel given a channel number+flags. We cache 927 * the previous lookup to optimize switching between two 928 * channels--as happens with dynamic turbo. 929 */ 930struct ieee80211_channel * 931ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags) 932{ 933 struct ieee80211_channel *c; 934 int i; 935 936 flags &= IEEE80211_CHAN_ALLTURBO; 937 c = ic->ic_prevchan; 938 if (c != NULL && c->ic_ieee == ieee && 939 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 940 return c; 941 /* brute force search */ 942 for (i = 0; i < ic->ic_nchans; i++) { 943 c = &ic->ic_channels[i]; 944 if (c->ic_ieee == ieee && 945 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 946 return c; 947 } 948 return NULL; 949} 950 951static void 952addmedia(struct ifmedia *media, int caps, int addsta, int mode, int mword) 953{ 954#define ADD(_ic, _s, _o) \ 955 ifmedia_add(media, \ 956 IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL) 957 static const u_int mopts[IEEE80211_MODE_MAX] = { 958 [IEEE80211_MODE_AUTO] = IFM_AUTO, 959 [IEEE80211_MODE_11A] = IFM_IEEE80211_11A, 960 [IEEE80211_MODE_11B] = IFM_IEEE80211_11B, 961 [IEEE80211_MODE_11G] = IFM_IEEE80211_11G, 962 [IEEE80211_MODE_FH] = IFM_IEEE80211_FH, 963 [IEEE80211_MODE_TURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO, 964 [IEEE80211_MODE_TURBO_G] = IFM_IEEE80211_11G|IFM_IEEE80211_TURBO, 965 [IEEE80211_MODE_STURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO, 966 [IEEE80211_MODE_HALF] = IFM_IEEE80211_11A, /* XXX */ 967 [IEEE80211_MODE_QUARTER] = IFM_IEEE80211_11A, /* XXX */ 968 [IEEE80211_MODE_11NA] = IFM_IEEE80211_11NA, 969 [IEEE80211_MODE_11NG] = IFM_IEEE80211_11NG, 970 }; 971 u_int mopt; 972 973 mopt = mopts[mode]; 974 if (addsta) 975 ADD(ic, mword, mopt); /* STA mode has no cap */ 976 if (caps & IEEE80211_C_IBSS) 977 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC); 978 if (caps & IEEE80211_C_HOSTAP) 979 ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP); 980 if (caps & IEEE80211_C_AHDEMO) 981 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0); 982 if (caps & IEEE80211_C_MONITOR) 983 ADD(media, mword, mopt | IFM_IEEE80211_MONITOR); 984 if (caps & IEEE80211_C_WDS) 985 ADD(media, mword, mopt | IFM_IEEE80211_WDS); 986 if (caps & IEEE80211_C_MBSS) 987 ADD(media, mword, mopt | IFM_IEEE80211_MBSS); 988#undef ADD 989} 990 991/* 992 * Setup the media data structures according to the channel and 993 * rate tables. 994 */ 995static int 996ieee80211_media_setup(struct ieee80211com *ic, 997 struct ifmedia *media, int caps, int addsta, 998 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) 999{ 1000 int i, j, mode, rate, maxrate, mword, r; 1001 const struct ieee80211_rateset *rs; 1002 struct ieee80211_rateset allrates; 1003 1004 /* 1005 * Fill in media characteristics. 1006 */ 1007 ifmedia_init(media, 0, media_change, media_stat); 1008 maxrate = 0; 1009 /* 1010 * Add media for legacy operating modes. 1011 */ 1012 memset(&allrates, 0, sizeof(allrates)); 1013 for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) { 1014 if (isclr(ic->ic_modecaps, mode)) 1015 continue; 1016 addmedia(media, caps, addsta, mode, IFM_AUTO); 1017 if (mode == IEEE80211_MODE_AUTO) 1018 continue; 1019 rs = &ic->ic_sup_rates[mode]; 1020 for (i = 0; i < rs->rs_nrates; i++) { 1021 rate = rs->rs_rates[i]; 1022 mword = ieee80211_rate2media(ic, rate, mode); 1023 if (mword == 0) 1024 continue; 1025 addmedia(media, caps, addsta, mode, mword); 1026 /* 1027 * Add legacy rate to the collection of all rates. 1028 */ 1029 r = rate & IEEE80211_RATE_VAL; 1030 for (j = 0; j < allrates.rs_nrates; j++) 1031 if (allrates.rs_rates[j] == r) 1032 break; 1033 if (j == allrates.rs_nrates) { 1034 /* unique, add to the set */ 1035 allrates.rs_rates[j] = r; 1036 allrates.rs_nrates++; 1037 } 1038 rate = (rate & IEEE80211_RATE_VAL) / 2; 1039 if (rate > maxrate) 1040 maxrate = rate; 1041 } 1042 } 1043 for (i = 0; i < allrates.rs_nrates; i++) { 1044 mword = ieee80211_rate2media(ic, allrates.rs_rates[i], 1045 IEEE80211_MODE_AUTO); 1046 if (mword == 0) 1047 continue; 1048 /* NB: remove media options from mword */ 1049 addmedia(media, caps, addsta, 1050 IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword)); 1051 } 1052 /* 1053 * Add HT/11n media. Note that we do not have enough 1054 * bits in the media subtype to express the MCS so we 1055 * use a "placeholder" media subtype and any fixed MCS 1056 * must be specified with a different mechanism. 1057 */ 1058 for (; mode <= IEEE80211_MODE_11NG; mode++) { 1059 if (isclr(ic->ic_modecaps, mode)) 1060 continue; 1061 addmedia(media, caps, addsta, mode, IFM_AUTO); 1062 addmedia(media, caps, addsta, mode, IFM_IEEE80211_MCS); 1063 } 1064 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) || 1065 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) { 1066 addmedia(media, caps, addsta, 1067 IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS); 1068 /* XXX could walk htrates */ 1069 /* XXX known array size */ 1070 if (ieee80211_htrates[15].ht40_rate_400ns > maxrate) 1071 maxrate = ieee80211_htrates[15].ht40_rate_400ns; 1072 } 1073 return maxrate; 1074} 1075 1076void 1077ieee80211_media_init(struct ieee80211com *ic) 1078{ 1079 struct ifnet *ifp = ic->ic_ifp; 1080 int maxrate; 1081 1082 /* NB: this works because the structure is initialized to zero */ 1083 if (!LIST_EMPTY(&ic->ic_media.ifm_list)) { 1084 /* 1085 * We are re-initializing the channel list; clear 1086 * the existing media state as the media routines 1087 * don't suppress duplicates. 1088 */ 1089 ifmedia_removeall(&ic->ic_media); 1090 } 1091 ieee80211_chan_init(ic); 1092 1093 /* 1094 * Recalculate media settings in case new channel list changes 1095 * the set of available modes. 1096 */ 1097 maxrate = ieee80211_media_setup(ic, &ic->ic_media, ic->ic_caps, 1, 1098 ieee80211com_media_change, ieee80211com_media_status); 1099 /* NB: strip explicit mode; we're actually in autoselect */ 1100 ifmedia_set(&ic->ic_media, 1101 media_status(ic->ic_opmode, ic->ic_curchan) &~ 1102 (IFM_MMASK | IFM_IEEE80211_TURBO)); 1103 if (maxrate) 1104 ifp->if_baudrate = IF_Mbps(maxrate); 1105 1106 /* XXX need to propagate new media settings to vap's */ 1107} 1108 1109/* XXX inline or eliminate? */ 1110const struct ieee80211_rateset * 1111ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c) 1112{ 1113 /* XXX does this work for 11ng basic rates? */ 1114 return &ic->ic_sup_rates[ieee80211_chan2mode(c)]; 1115} 1116 1117void 1118ieee80211_announce(struct ieee80211com *ic) 1119{ 1120 struct ifnet *ifp = ic->ic_ifp; 1121 int i, mode, rate, mword; 1122 const struct ieee80211_rateset *rs; 1123 1124 /* NB: skip AUTO since it has no rates */ 1125 for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) { 1126 if (isclr(ic->ic_modecaps, mode)) 1127 continue; 1128 if_printf(ifp, "%s rates: ", ieee80211_phymode_name[mode]); 1129 rs = &ic->ic_sup_rates[mode]; 1130 for (i = 0; i < rs->rs_nrates; i++) { 1131 mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode); 1132 if (mword == 0) 1133 continue; 1134 rate = ieee80211_media2rate(mword); 1135 printf("%s%d%sMbps", (i != 0 ? " " : ""), 1136 rate / 2, ((rate & 0x1) != 0 ? ".5" : "")); 1137 } 1138 printf("\n"); 1139 } 1140 ieee80211_ht_announce(ic); 1141} 1142 1143void 1144ieee80211_announce_channels(struct ieee80211com *ic) 1145{ 1146 const struct ieee80211_channel *c; 1147 char type; 1148 int i, cw; 1149 1150 printf("Chan Freq CW RegPwr MinPwr MaxPwr\n"); 1151 for (i = 0; i < ic->ic_nchans; i++) { 1152 c = &ic->ic_channels[i]; 1153 if (IEEE80211_IS_CHAN_ST(c)) 1154 type = 'S'; 1155 else if (IEEE80211_IS_CHAN_108A(c)) 1156 type = 'T'; 1157 else if (IEEE80211_IS_CHAN_108G(c)) 1158 type = 'G'; 1159 else if (IEEE80211_IS_CHAN_HT(c)) 1160 type = 'n'; 1161 else if (IEEE80211_IS_CHAN_A(c)) 1162 type = 'a'; 1163 else if (IEEE80211_IS_CHAN_ANYG(c)) 1164 type = 'g'; 1165 else if (IEEE80211_IS_CHAN_B(c)) 1166 type = 'b'; 1167 else 1168 type = 'f'; 1169 if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c)) 1170 cw = 40; 1171 else if (IEEE80211_IS_CHAN_HALF(c)) 1172 cw = 10; 1173 else if (IEEE80211_IS_CHAN_QUARTER(c)) 1174 cw = 5; 1175 else 1176 cw = 20; 1177 printf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n" 1178 , c->ic_ieee, c->ic_freq, type 1179 , cw 1180 , IEEE80211_IS_CHAN_HT40U(c) ? '+' : 1181 IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' ' 1182 , c->ic_maxregpower 1183 , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0 1184 , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0 1185 ); 1186 } 1187} 1188 1189static int 1190media2mode(const struct ifmedia_entry *ime, uint32_t flags, uint16_t *mode) 1191{ 1192 switch (IFM_MODE(ime->ifm_media)) { 1193 case IFM_IEEE80211_11A: 1194 *mode = IEEE80211_MODE_11A; 1195 break; 1196 case IFM_IEEE80211_11B: 1197 *mode = IEEE80211_MODE_11B; 1198 break; 1199 case IFM_IEEE80211_11G: 1200 *mode = IEEE80211_MODE_11G; 1201 break; 1202 case IFM_IEEE80211_FH: 1203 *mode = IEEE80211_MODE_FH; 1204 break; 1205 case IFM_IEEE80211_11NA: 1206 *mode = IEEE80211_MODE_11NA; 1207 break; 1208 case IFM_IEEE80211_11NG: 1209 *mode = IEEE80211_MODE_11NG; 1210 break; 1211 case IFM_AUTO: 1212 *mode = IEEE80211_MODE_AUTO; 1213 break; 1214 default: 1215 return 0; 1216 } 1217 /* 1218 * Turbo mode is an ``option''. 1219 * XXX does not apply to AUTO 1220 */ 1221 if (ime->ifm_media & IFM_IEEE80211_TURBO) { 1222 if (*mode == IEEE80211_MODE_11A) { 1223 if (flags & IEEE80211_F_TURBOP) 1224 *mode = IEEE80211_MODE_TURBO_A; 1225 else 1226 *mode = IEEE80211_MODE_STURBO_A; 1227 } else if (*mode == IEEE80211_MODE_11G) 1228 *mode = IEEE80211_MODE_TURBO_G; 1229 else 1230 return 0; 1231 } 1232 /* XXX HT40 +/- */ 1233 return 1; 1234} 1235 1236/* 1237 * Handle a media change request on the underlying interface. 1238 */ 1239int 1240ieee80211com_media_change(struct ifnet *ifp) 1241{ 1242 return EINVAL; 1243} 1244 1245/* 1246 * Handle a media change request on the vap interface. 1247 */ 1248int 1249ieee80211_media_change(struct ifnet *ifp) 1250{ 1251 struct ieee80211vap *vap = ifp->if_softc; 1252 struct ifmedia_entry *ime = vap->iv_media.ifm_cur; 1253 uint16_t newmode; 1254 1255 if (!media2mode(ime, vap->iv_flags, &newmode)) 1256 return EINVAL; 1257 if (vap->iv_des_mode != newmode) { 1258 vap->iv_des_mode = newmode; 1259 /* XXX kick state machine if up+running */ 1260 } 1261 return 0; 1262} 1263 1264/* 1265 * Common code to calculate the media status word 1266 * from the operating mode and channel state. 1267 */ 1268static int 1269media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan) 1270{ 1271 int status; 1272 1273 status = IFM_IEEE80211; 1274 switch (opmode) { 1275 case IEEE80211_M_STA: 1276 break; 1277 case IEEE80211_M_IBSS: 1278 status |= IFM_IEEE80211_ADHOC; 1279 break; 1280 case IEEE80211_M_HOSTAP: 1281 status |= IFM_IEEE80211_HOSTAP; 1282 break; 1283 case IEEE80211_M_MONITOR: 1284 status |= IFM_IEEE80211_MONITOR; 1285 break; 1286 case IEEE80211_M_AHDEMO: 1287 status |= IFM_IEEE80211_ADHOC | IFM_FLAG0; 1288 break; 1289 case IEEE80211_M_WDS: 1290 status |= IFM_IEEE80211_WDS; 1291 break; 1292 case IEEE80211_M_MBSS: 1293 status |= IFM_IEEE80211_MBSS; 1294 break; 1295 } 1296 if (IEEE80211_IS_CHAN_HTA(chan)) { 1297 status |= IFM_IEEE80211_11NA; 1298 } else if (IEEE80211_IS_CHAN_HTG(chan)) { 1299 status |= IFM_IEEE80211_11NG; 1300 } else if (IEEE80211_IS_CHAN_A(chan)) { 1301 status |= IFM_IEEE80211_11A; 1302 } else if (IEEE80211_IS_CHAN_B(chan)) { 1303 status |= IFM_IEEE80211_11B; 1304 } else if (IEEE80211_IS_CHAN_ANYG(chan)) { 1305 status |= IFM_IEEE80211_11G; 1306 } else if (IEEE80211_IS_CHAN_FHSS(chan)) { 1307 status |= IFM_IEEE80211_FH; 1308 } 1309 /* XXX else complain? */ 1310 1311 if (IEEE80211_IS_CHAN_TURBO(chan)) 1312 status |= IFM_IEEE80211_TURBO; 1313#if 0 1314 if (IEEE80211_IS_CHAN_HT20(chan)) 1315 status |= IFM_IEEE80211_HT20; 1316 if (IEEE80211_IS_CHAN_HT40(chan)) 1317 status |= IFM_IEEE80211_HT40; 1318#endif 1319 return status; 1320} 1321 1322static void 1323ieee80211com_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1324{ 1325 struct ieee80211com *ic = ifp->if_l2com; 1326 struct ieee80211vap *vap; 1327 1328 imr->ifm_status = IFM_AVALID; 1329 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1330 if (vap->iv_ifp->if_flags & IFF_UP) { 1331 imr->ifm_status |= IFM_ACTIVE; 1332 break; 1333 } 1334 imr->ifm_active = media_status(ic->ic_opmode, ic->ic_curchan); 1335 if (imr->ifm_status & IFM_ACTIVE) 1336 imr->ifm_current = imr->ifm_active; 1337} 1338 1339void 1340ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1341{ 1342 struct ieee80211vap *vap = ifp->if_softc; 1343 struct ieee80211com *ic = vap->iv_ic; 1344 enum ieee80211_phymode mode; 1345 1346 imr->ifm_status = IFM_AVALID; 1347 /* 1348 * NB: use the current channel's mode to lock down a xmit 1349 * rate only when running; otherwise we may have a mismatch 1350 * in which case the rate will not be convertible. 1351 */ 1352 if (vap->iv_state == IEEE80211_S_RUN) { 1353 imr->ifm_status |= IFM_ACTIVE; 1354 mode = ieee80211_chan2mode(ic->ic_curchan); 1355 } else 1356 mode = IEEE80211_MODE_AUTO; 1357 imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan); 1358 /* 1359 * Calculate a current rate if possible. 1360 */ 1361 if (vap->iv_txparms[mode].ucastrate != IEEE80211_FIXED_RATE_NONE) { 1362 /* 1363 * A fixed rate is set, report that. 1364 */ 1365 imr->ifm_active |= ieee80211_rate2media(ic, 1366 vap->iv_txparms[mode].ucastrate, mode); 1367 } else if (vap->iv_opmode == IEEE80211_M_STA) { 1368 /* 1369 * In station mode report the current transmit rate. 1370 */ 1371 imr->ifm_active |= ieee80211_rate2media(ic, 1372 vap->iv_bss->ni_txrate, mode); 1373 } else 1374 imr->ifm_active |= IFM_AUTO; 1375 if (imr->ifm_status & IFM_ACTIVE) 1376 imr->ifm_current = imr->ifm_active; 1377} 1378 1379/* 1380 * Set the current phy mode and recalculate the active channel 1381 * set based on the available channels for this mode. Also 1382 * select a new default/current channel if the current one is 1383 * inappropriate for this mode. 1384 */ 1385int 1386ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode) 1387{ 1388 /* 1389 * Adjust basic rates in 11b/11g supported rate set. 1390 * Note that if operating on a hal/quarter rate channel 1391 * this is a noop as those rates sets are different 1392 * and used instead. 1393 */ 1394 if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B) 1395 ieee80211_setbasicrates(&ic->ic_sup_rates[mode], mode); 1396 1397 ic->ic_curmode = mode; 1398 ieee80211_reset_erp(ic); /* reset ERP state */ 1399 1400 return 0; 1401} 1402 1403/* 1404 * Return the phy mode for with the specified channel. 1405 */ 1406enum ieee80211_phymode 1407ieee80211_chan2mode(const struct ieee80211_channel *chan) 1408{ 1409 1410 if (IEEE80211_IS_CHAN_HTA(chan)) 1411 return IEEE80211_MODE_11NA; 1412 else if (IEEE80211_IS_CHAN_HTG(chan)) 1413 return IEEE80211_MODE_11NG; 1414 else if (IEEE80211_IS_CHAN_108G(chan)) 1415 return IEEE80211_MODE_TURBO_G; 1416 else if (IEEE80211_IS_CHAN_ST(chan)) 1417 return IEEE80211_MODE_STURBO_A; 1418 else if (IEEE80211_IS_CHAN_TURBO(chan)) 1419 return IEEE80211_MODE_TURBO_A; 1420 else if (IEEE80211_IS_CHAN_HALF(chan)) 1421 return IEEE80211_MODE_HALF; 1422 else if (IEEE80211_IS_CHAN_QUARTER(chan)) 1423 return IEEE80211_MODE_QUARTER; 1424 else if (IEEE80211_IS_CHAN_A(chan)) 1425 return IEEE80211_MODE_11A; 1426 else if (IEEE80211_IS_CHAN_ANYG(chan)) 1427 return IEEE80211_MODE_11G; 1428 else if (IEEE80211_IS_CHAN_B(chan)) 1429 return IEEE80211_MODE_11B; 1430 else if (IEEE80211_IS_CHAN_FHSS(chan)) 1431 return IEEE80211_MODE_FH; 1432 1433 /* NB: should not get here */ 1434 printf("%s: cannot map channel to mode; freq %u flags 0x%x\n", 1435 __func__, chan->ic_freq, chan->ic_flags); 1436 return IEEE80211_MODE_11B; 1437} 1438 1439struct ratemedia { 1440 u_int match; /* rate + mode */ 1441 u_int media; /* if_media rate */ 1442}; 1443 1444static int 1445findmedia(const struct ratemedia rates[], int n, u_int match) 1446{ 1447 int i; 1448 1449 for (i = 0; i < n; i++) 1450 if (rates[i].match == match) 1451 return rates[i].media; 1452 return IFM_AUTO; 1453} 1454 1455/* 1456 * Convert IEEE80211 rate value to ifmedia subtype. 1457 * Rate is either a legacy rate in units of 0.5Mbps 1458 * or an MCS index. 1459 */ 1460int 1461ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode) 1462{ 1463#define N(a) (sizeof(a) / sizeof(a[0])) 1464 static const struct ratemedia rates[] = { 1465 { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 }, 1466 { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 }, 1467 { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 }, 1468 { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 }, 1469 { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 }, 1470 { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 }, 1471 { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 }, 1472 { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 }, 1473 { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 }, 1474 { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 }, 1475 { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 }, 1476 { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 }, 1477 { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 }, 1478 { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 }, 1479 { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 }, 1480 { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 }, 1481 { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 }, 1482 { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 }, 1483 { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 }, 1484 { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 }, 1485 { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 }, 1486 { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 }, 1487 { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 }, 1488 { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 }, 1489 { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 }, 1490 { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 }, 1491 { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 }, 1492 { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 }, 1493 { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 }, 1494 { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 }, 1495 /* NB: OFDM72 doesn't realy exist so we don't handle it */ 1496 }; 1497 static const struct ratemedia htrates[] = { 1498 { 0, IFM_IEEE80211_MCS }, 1499 { 1, IFM_IEEE80211_MCS }, 1500 { 2, IFM_IEEE80211_MCS }, 1501 { 3, IFM_IEEE80211_MCS }, 1502 { 4, IFM_IEEE80211_MCS }, 1503 { 5, IFM_IEEE80211_MCS }, 1504 { 6, IFM_IEEE80211_MCS }, 1505 { 7, IFM_IEEE80211_MCS }, 1506 { 8, IFM_IEEE80211_MCS }, 1507 { 9, IFM_IEEE80211_MCS }, 1508 { 10, IFM_IEEE80211_MCS }, 1509 { 11, IFM_IEEE80211_MCS }, 1510 { 12, IFM_IEEE80211_MCS }, 1511 { 13, IFM_IEEE80211_MCS }, 1512 { 14, IFM_IEEE80211_MCS }, 1513 { 15, IFM_IEEE80211_MCS }, 1514 }; 1515 int m; 1516 1517 /* 1518 * Check 11n rates first for match as an MCS. 1519 */ 1520 if (mode == IEEE80211_MODE_11NA) { 1521 if (rate & IEEE80211_RATE_MCS) { 1522 rate &= ~IEEE80211_RATE_MCS; 1523 m = findmedia(htrates, N(htrates), rate); 1524 if (m != IFM_AUTO) 1525 return m | IFM_IEEE80211_11NA; 1526 } 1527 } else if (mode == IEEE80211_MODE_11NG) { 1528 /* NB: 12 is ambiguous, it will be treated as an MCS */ 1529 if (rate & IEEE80211_RATE_MCS) { 1530 rate &= ~IEEE80211_RATE_MCS; 1531 m = findmedia(htrates, N(htrates), rate); 1532 if (m != IFM_AUTO) 1533 return m | IFM_IEEE80211_11NG; 1534 } 1535 } 1536 rate &= IEEE80211_RATE_VAL; 1537 switch (mode) { 1538 case IEEE80211_MODE_11A: 1539 case IEEE80211_MODE_HALF: /* XXX good 'nuf */ 1540 case IEEE80211_MODE_QUARTER: 1541 case IEEE80211_MODE_11NA: 1542 case IEEE80211_MODE_TURBO_A: 1543 case IEEE80211_MODE_STURBO_A: 1544 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11A); 1545 case IEEE80211_MODE_11B: 1546 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11B); 1547 case IEEE80211_MODE_FH: 1548 return findmedia(rates, N(rates), rate | IFM_IEEE80211_FH); 1549 case IEEE80211_MODE_AUTO: 1550 /* NB: ic may be NULL for some drivers */ 1551 if (ic != NULL && ic->ic_phytype == IEEE80211_T_FH) 1552 return findmedia(rates, N(rates), 1553 rate | IFM_IEEE80211_FH); 1554 /* NB: hack, 11g matches both 11b+11a rates */ 1555 /* fall thru... */ 1556 case IEEE80211_MODE_11G: 1557 case IEEE80211_MODE_11NG: 1558 case IEEE80211_MODE_TURBO_G: 1559 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11G); 1560 } 1561 return IFM_AUTO; 1562#undef N 1563} 1564 1565int 1566ieee80211_media2rate(int mword) 1567{ 1568#define N(a) (sizeof(a) / sizeof(a[0])) 1569 static const int ieeerates[] = { 1570 -1, /* IFM_AUTO */ 1571 0, /* IFM_MANUAL */ 1572 0, /* IFM_NONE */ 1573 2, /* IFM_IEEE80211_FH1 */ 1574 4, /* IFM_IEEE80211_FH2 */ 1575 2, /* IFM_IEEE80211_DS1 */ 1576 4, /* IFM_IEEE80211_DS2 */ 1577 11, /* IFM_IEEE80211_DS5 */ 1578 22, /* IFM_IEEE80211_DS11 */ 1579 44, /* IFM_IEEE80211_DS22 */ 1580 12, /* IFM_IEEE80211_OFDM6 */ 1581 18, /* IFM_IEEE80211_OFDM9 */ 1582 24, /* IFM_IEEE80211_OFDM12 */ 1583 36, /* IFM_IEEE80211_OFDM18 */ 1584 48, /* IFM_IEEE80211_OFDM24 */ 1585 72, /* IFM_IEEE80211_OFDM36 */ 1586 96, /* IFM_IEEE80211_OFDM48 */ 1587 108, /* IFM_IEEE80211_OFDM54 */ 1588 144, /* IFM_IEEE80211_OFDM72 */ 1589 0, /* IFM_IEEE80211_DS354k */ 1590 0, /* IFM_IEEE80211_DS512k */ 1591 6, /* IFM_IEEE80211_OFDM3 */ 1592 9, /* IFM_IEEE80211_OFDM4 */ 1593 54, /* IFM_IEEE80211_OFDM27 */ 1594 -1, /* IFM_IEEE80211_MCS */ 1595 }; 1596 return IFM_SUBTYPE(mword) < N(ieeerates) ? 1597 ieeerates[IFM_SUBTYPE(mword)] : 0; 1598#undef N 1599} 1600 1601/* 1602 * The following hash function is adapted from "Hash Functions" by Bob Jenkins 1603 * ("Algorithm Alley", Dr. Dobbs Journal, September 1997). 1604 */ 1605#define mix(a, b, c) \ 1606do { \ 1607 a -= b; a -= c; a ^= (c >> 13); \ 1608 b -= c; b -= a; b ^= (a << 8); \ 1609 c -= a; c -= b; c ^= (b >> 13); \ 1610 a -= b; a -= c; a ^= (c >> 12); \ 1611 b -= c; b -= a; b ^= (a << 16); \ 1612 c -= a; c -= b; c ^= (b >> 5); \ 1613 a -= b; a -= c; a ^= (c >> 3); \ 1614 b -= c; b -= a; b ^= (a << 10); \ 1615 c -= a; c -= b; c ^= (b >> 15); \ 1616} while (/*CONSTCOND*/0) 1617 1618uint32_t 1619ieee80211_mac_hash(const struct ieee80211com *ic, 1620 const uint8_t addr[IEEE80211_ADDR_LEN]) 1621{ 1622 uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = ic->ic_hash_key; 1623 1624 b += addr[5] << 8; 1625 b += addr[4]; 1626 a += addr[3] << 24; 1627 a += addr[2] << 16; 1628 a += addr[1] << 8; 1629 a += addr[0]; 1630 1631 mix(a, b, c); 1632 1633 return c; 1634} 1635#undef mix 1636