ieee80211.c revision 195846
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 195846 2009-07-24 15:27:02Z 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 * NB: must be before ether_ifdetach() and removal from ic_vaps list 577 */ 578 ieee80211_draintask(ic, &vap->iv_nstate_task); 579 ieee80211_draintask(ic, &vap->iv_swbmiss_task); 580 581 IEEE80211_LOCK(ic); 582 KASSERT(vap->iv_state == IEEE80211_S_INIT , ("vap still running")); 583 TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next); 584 ieee80211_syncflag_locked(ic, IEEE80211_F_WME); 585#ifdef IEEE80211_SUPPORT_SUPERG 586 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); 587#endif 588 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); 589 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); 590 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT); 591 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40); 592 /* NB: this handles the bpfdetach done below */ 593 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_BPF); 594 ieee80211_syncifflag_locked(ic, IFF_PROMISC); 595 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI); 596 IEEE80211_UNLOCK(ic); 597 598 ifmedia_removeall(&vap->iv_media); 599 600 ieee80211_radiotap_vdetach(vap); 601 ieee80211_regdomain_vdetach(vap); 602 ieee80211_scan_vdetach(vap); 603#ifdef IEEE80211_SUPPORT_SUPERG 604 ieee80211_superg_vdetach(vap); 605#endif 606 ieee80211_ht_vdetach(vap); 607 /* NB: must be before ieee80211_node_vdetach */ 608 ieee80211_proto_vdetach(vap); 609 ieee80211_crypto_vdetach(vap); 610 ieee80211_power_vdetach(vap); 611 ieee80211_node_vdetach(vap); 612 ieee80211_sysctl_vdetach(vap); 613 614 if_free(ifp); 615} 616 617/* 618 * Synchronize flag bit state in the parent ifnet structure 619 * according to the state of all vap ifnet's. This is used, 620 * for example, to handle IFF_PROMISC and IFF_ALLMULTI. 621 */ 622void 623ieee80211_syncifflag_locked(struct ieee80211com *ic, int flag) 624{ 625 struct ifnet *ifp = ic->ic_ifp; 626 struct ieee80211vap *vap; 627 int bit, oflags; 628 629 IEEE80211_LOCK_ASSERT(ic); 630 631 bit = 0; 632 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 633 if (vap->iv_ifp->if_flags & flag) { 634 /* 635 * XXX the bridge sets PROMISC but we don't want to 636 * enable it on the device, discard here so all the 637 * drivers don't need to special-case it 638 */ 639 if (flag == IFF_PROMISC && 640 vap->iv_opmode == IEEE80211_M_HOSTAP) 641 continue; 642 bit = 1; 643 break; 644 } 645 oflags = ifp->if_flags; 646 if (bit) 647 ifp->if_flags |= flag; 648 else 649 ifp->if_flags &= ~flag; 650 if ((ifp->if_flags ^ oflags) & flag) { 651 /* XXX should we return 1/0 and let caller do this? */ 652 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 653 if (flag == IFF_PROMISC) 654 ieee80211_runtask(ic, &ic->ic_promisc_task); 655 else if (flag == IFF_ALLMULTI) 656 ieee80211_runtask(ic, &ic->ic_mcast_task); 657 } 658 } 659} 660 661/* 662 * Synchronize flag bit state in the com structure 663 * according to the state of all vap's. This is used, 664 * for example, to handle state changes via ioctls. 665 */ 666static void 667ieee80211_syncflag_locked(struct ieee80211com *ic, int flag) 668{ 669 struct ieee80211vap *vap; 670 int bit; 671 672 IEEE80211_LOCK_ASSERT(ic); 673 674 bit = 0; 675 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 676 if (vap->iv_flags & flag) { 677 bit = 1; 678 break; 679 } 680 if (bit) 681 ic->ic_flags |= flag; 682 else 683 ic->ic_flags &= ~flag; 684} 685 686void 687ieee80211_syncflag(struct ieee80211vap *vap, int flag) 688{ 689 struct ieee80211com *ic = vap->iv_ic; 690 691 IEEE80211_LOCK(ic); 692 if (flag < 0) { 693 flag = -flag; 694 vap->iv_flags &= ~flag; 695 } else 696 vap->iv_flags |= flag; 697 ieee80211_syncflag_locked(ic, flag); 698 IEEE80211_UNLOCK(ic); 699} 700 701/* 702 * Synchronize flags_ht bit state in the com structure 703 * according to the state of all vap's. This is used, 704 * for example, to handle state changes via ioctls. 705 */ 706static void 707ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag) 708{ 709 struct ieee80211vap *vap; 710 int bit; 711 712 IEEE80211_LOCK_ASSERT(ic); 713 714 bit = 0; 715 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 716 if (vap->iv_flags_ht & flag) { 717 bit = 1; 718 break; 719 } 720 if (bit) 721 ic->ic_flags_ht |= flag; 722 else 723 ic->ic_flags_ht &= ~flag; 724} 725 726void 727ieee80211_syncflag_ht(struct ieee80211vap *vap, int flag) 728{ 729 struct ieee80211com *ic = vap->iv_ic; 730 731 IEEE80211_LOCK(ic); 732 if (flag < 0) { 733 flag = -flag; 734 vap->iv_flags_ht &= ~flag; 735 } else 736 vap->iv_flags_ht |= flag; 737 ieee80211_syncflag_ht_locked(ic, flag); 738 IEEE80211_UNLOCK(ic); 739} 740 741/* 742 * Synchronize flags_ext bit state in the com structure 743 * according to the state of all vap's. This is used, 744 * for example, to handle state changes via ioctls. 745 */ 746static void 747ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag) 748{ 749 struct ieee80211vap *vap; 750 int bit; 751 752 IEEE80211_LOCK_ASSERT(ic); 753 754 bit = 0; 755 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 756 if (vap->iv_flags_ext & flag) { 757 bit = 1; 758 break; 759 } 760 if (bit) 761 ic->ic_flags_ext |= flag; 762 else 763 ic->ic_flags_ext &= ~flag; 764} 765 766void 767ieee80211_syncflag_ext(struct ieee80211vap *vap, int flag) 768{ 769 struct ieee80211com *ic = vap->iv_ic; 770 771 IEEE80211_LOCK(ic); 772 if (flag < 0) { 773 flag = -flag; 774 vap->iv_flags_ext &= ~flag; 775 } else 776 vap->iv_flags_ext |= flag; 777 ieee80211_syncflag_ext_locked(ic, flag); 778 IEEE80211_UNLOCK(ic); 779} 780 781static __inline int 782mapgsm(u_int freq, u_int flags) 783{ 784 freq *= 10; 785 if (flags & IEEE80211_CHAN_QUARTER) 786 freq += 5; 787 else if (flags & IEEE80211_CHAN_HALF) 788 freq += 10; 789 else 790 freq += 20; 791 /* NB: there is no 907/20 wide but leave room */ 792 return (freq - 906*10) / 5; 793} 794 795static __inline int 796mappsb(u_int freq, u_int flags) 797{ 798 return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5; 799} 800 801/* 802 * Convert MHz frequency to IEEE channel number. 803 */ 804int 805ieee80211_mhz2ieee(u_int freq, u_int flags) 806{ 807#define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990) 808 if (flags & IEEE80211_CHAN_GSM) 809 return mapgsm(freq, flags); 810 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 811 if (freq == 2484) 812 return 14; 813 if (freq < 2484) 814 return ((int) freq - 2407) / 5; 815 else 816 return 15 + ((freq - 2512) / 20); 817 } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */ 818 if (freq <= 5000) { 819 /* XXX check regdomain? */ 820 if (IS_FREQ_IN_PSB(freq)) 821 return mappsb(freq, flags); 822 return (freq - 4000) / 5; 823 } else 824 return (freq - 5000) / 5; 825 } else { /* either, guess */ 826 if (freq == 2484) 827 return 14; 828 if (freq < 2484) { 829 if (907 <= freq && freq <= 922) 830 return mapgsm(freq, flags); 831 return ((int) freq - 2407) / 5; 832 } 833 if (freq < 5000) { 834 if (IS_FREQ_IN_PSB(freq)) 835 return mappsb(freq, flags); 836 else if (freq > 4900) 837 return (freq - 4000) / 5; 838 else 839 return 15 + ((freq - 2512) / 20); 840 } 841 return (freq - 5000) / 5; 842 } 843#undef IS_FREQ_IN_PSB 844} 845 846/* 847 * Convert channel to IEEE channel number. 848 */ 849int 850ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c) 851{ 852 if (c == NULL) { 853 if_printf(ic->ic_ifp, "invalid channel (NULL)\n"); 854 return 0; /* XXX */ 855 } 856 return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee); 857} 858 859/* 860 * Convert IEEE channel number to MHz frequency. 861 */ 862u_int 863ieee80211_ieee2mhz(u_int chan, u_int flags) 864{ 865 if (flags & IEEE80211_CHAN_GSM) 866 return 907 + 5 * (chan / 10); 867 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 868 if (chan == 14) 869 return 2484; 870 if (chan < 14) 871 return 2407 + chan*5; 872 else 873 return 2512 + ((chan-15)*20); 874 } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */ 875 if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) { 876 chan -= 37; 877 return 4940 + chan*5 + (chan % 5 ? 2 : 0); 878 } 879 return 5000 + (chan*5); 880 } else { /* either, guess */ 881 /* XXX can't distinguish PSB+GSM channels */ 882 if (chan == 14) 883 return 2484; 884 if (chan < 14) /* 0-13 */ 885 return 2407 + chan*5; 886 if (chan < 27) /* 15-26 */ 887 return 2512 + ((chan-15)*20); 888 return 5000 + (chan*5); 889 } 890} 891 892/* 893 * Locate a channel given a frequency+flags. We cache 894 * the previous lookup to optimize switching between two 895 * channels--as happens with dynamic turbo. 896 */ 897struct ieee80211_channel * 898ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags) 899{ 900 struct ieee80211_channel *c; 901 int i; 902 903 flags &= IEEE80211_CHAN_ALLTURBO; 904 c = ic->ic_prevchan; 905 if (c != NULL && c->ic_freq == freq && 906 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 907 return c; 908 /* brute force search */ 909 for (i = 0; i < ic->ic_nchans; i++) { 910 c = &ic->ic_channels[i]; 911 if (c->ic_freq == freq && 912 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 913 return c; 914 } 915 return NULL; 916} 917 918/* 919 * Locate a channel given a channel number+flags. We cache 920 * the previous lookup to optimize switching between two 921 * channels--as happens with dynamic turbo. 922 */ 923struct ieee80211_channel * 924ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags) 925{ 926 struct ieee80211_channel *c; 927 int i; 928 929 flags &= IEEE80211_CHAN_ALLTURBO; 930 c = ic->ic_prevchan; 931 if (c != NULL && c->ic_ieee == ieee && 932 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 933 return c; 934 /* brute force search */ 935 for (i = 0; i < ic->ic_nchans; i++) { 936 c = &ic->ic_channels[i]; 937 if (c->ic_ieee == ieee && 938 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 939 return c; 940 } 941 return NULL; 942} 943 944static void 945addmedia(struct ifmedia *media, int caps, int addsta, int mode, int mword) 946{ 947#define ADD(_ic, _s, _o) \ 948 ifmedia_add(media, \ 949 IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL) 950 static const u_int mopts[IEEE80211_MODE_MAX] = { 951 [IEEE80211_MODE_AUTO] = IFM_AUTO, 952 [IEEE80211_MODE_11A] = IFM_IEEE80211_11A, 953 [IEEE80211_MODE_11B] = IFM_IEEE80211_11B, 954 [IEEE80211_MODE_11G] = IFM_IEEE80211_11G, 955 [IEEE80211_MODE_FH] = IFM_IEEE80211_FH, 956 [IEEE80211_MODE_TURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO, 957 [IEEE80211_MODE_TURBO_G] = IFM_IEEE80211_11G|IFM_IEEE80211_TURBO, 958 [IEEE80211_MODE_STURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO, 959 [IEEE80211_MODE_HALF] = IFM_IEEE80211_11A, /* XXX */ 960 [IEEE80211_MODE_QUARTER] = IFM_IEEE80211_11A, /* XXX */ 961 [IEEE80211_MODE_11NA] = IFM_IEEE80211_11NA, 962 [IEEE80211_MODE_11NG] = IFM_IEEE80211_11NG, 963 }; 964 u_int mopt; 965 966 mopt = mopts[mode]; 967 if (addsta) 968 ADD(ic, mword, mopt); /* STA mode has no cap */ 969 if (caps & IEEE80211_C_IBSS) 970 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC); 971 if (caps & IEEE80211_C_HOSTAP) 972 ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP); 973 if (caps & IEEE80211_C_AHDEMO) 974 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0); 975 if (caps & IEEE80211_C_MONITOR) 976 ADD(media, mword, mopt | IFM_IEEE80211_MONITOR); 977 if (caps & IEEE80211_C_WDS) 978 ADD(media, mword, mopt | IFM_IEEE80211_WDS); 979 if (caps & IEEE80211_C_MBSS) 980 ADD(media, mword, mopt | IFM_IEEE80211_MBSS); 981#undef ADD 982} 983 984/* 985 * Setup the media data structures according to the channel and 986 * rate tables. 987 */ 988static int 989ieee80211_media_setup(struct ieee80211com *ic, 990 struct ifmedia *media, int caps, int addsta, 991 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) 992{ 993 int i, j, mode, rate, maxrate, mword, r; 994 const struct ieee80211_rateset *rs; 995 struct ieee80211_rateset allrates; 996 997 /* 998 * Fill in media characteristics. 999 */ 1000 ifmedia_init(media, 0, media_change, media_stat); 1001 maxrate = 0; 1002 /* 1003 * Add media for legacy operating modes. 1004 */ 1005 memset(&allrates, 0, sizeof(allrates)); 1006 for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) { 1007 if (isclr(ic->ic_modecaps, mode)) 1008 continue; 1009 addmedia(media, caps, addsta, mode, IFM_AUTO); 1010 if (mode == IEEE80211_MODE_AUTO) 1011 continue; 1012 rs = &ic->ic_sup_rates[mode]; 1013 for (i = 0; i < rs->rs_nrates; i++) { 1014 rate = rs->rs_rates[i]; 1015 mword = ieee80211_rate2media(ic, rate, mode); 1016 if (mword == 0) 1017 continue; 1018 addmedia(media, caps, addsta, mode, mword); 1019 /* 1020 * Add legacy rate to the collection of all rates. 1021 */ 1022 r = rate & IEEE80211_RATE_VAL; 1023 for (j = 0; j < allrates.rs_nrates; j++) 1024 if (allrates.rs_rates[j] == r) 1025 break; 1026 if (j == allrates.rs_nrates) { 1027 /* unique, add to the set */ 1028 allrates.rs_rates[j] = r; 1029 allrates.rs_nrates++; 1030 } 1031 rate = (rate & IEEE80211_RATE_VAL) / 2; 1032 if (rate > maxrate) 1033 maxrate = rate; 1034 } 1035 } 1036 for (i = 0; i < allrates.rs_nrates; i++) { 1037 mword = ieee80211_rate2media(ic, allrates.rs_rates[i], 1038 IEEE80211_MODE_AUTO); 1039 if (mword == 0) 1040 continue; 1041 /* NB: remove media options from mword */ 1042 addmedia(media, caps, addsta, 1043 IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword)); 1044 } 1045 /* 1046 * Add HT/11n media. Note that we do not have enough 1047 * bits in the media subtype to express the MCS so we 1048 * use a "placeholder" media subtype and any fixed MCS 1049 * must be specified with a different mechanism. 1050 */ 1051 for (; mode <= IEEE80211_MODE_11NG; mode++) { 1052 if (isclr(ic->ic_modecaps, mode)) 1053 continue; 1054 addmedia(media, caps, addsta, mode, IFM_AUTO); 1055 addmedia(media, caps, addsta, mode, IFM_IEEE80211_MCS); 1056 } 1057 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) || 1058 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) { 1059 addmedia(media, caps, addsta, 1060 IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS); 1061 /* XXX could walk htrates */ 1062 /* XXX known array size */ 1063 if (ieee80211_htrates[15].ht40_rate_400ns > maxrate) 1064 maxrate = ieee80211_htrates[15].ht40_rate_400ns; 1065 } 1066 return maxrate; 1067} 1068 1069void 1070ieee80211_media_init(struct ieee80211com *ic) 1071{ 1072 struct ifnet *ifp = ic->ic_ifp; 1073 int maxrate; 1074 1075 /* NB: this works because the structure is initialized to zero */ 1076 if (!LIST_EMPTY(&ic->ic_media.ifm_list)) { 1077 /* 1078 * We are re-initializing the channel list; clear 1079 * the existing media state as the media routines 1080 * don't suppress duplicates. 1081 */ 1082 ifmedia_removeall(&ic->ic_media); 1083 } 1084 ieee80211_chan_init(ic); 1085 1086 /* 1087 * Recalculate media settings in case new channel list changes 1088 * the set of available modes. 1089 */ 1090 maxrate = ieee80211_media_setup(ic, &ic->ic_media, ic->ic_caps, 1, 1091 ieee80211com_media_change, ieee80211com_media_status); 1092 /* NB: strip explicit mode; we're actually in autoselect */ 1093 ifmedia_set(&ic->ic_media, 1094 media_status(ic->ic_opmode, ic->ic_curchan) &~ 1095 (IFM_MMASK | IFM_IEEE80211_TURBO)); 1096 if (maxrate) 1097 ifp->if_baudrate = IF_Mbps(maxrate); 1098 1099 /* XXX need to propagate new media settings to vap's */ 1100} 1101 1102/* XXX inline or eliminate? */ 1103const struct ieee80211_rateset * 1104ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c) 1105{ 1106 /* XXX does this work for 11ng basic rates? */ 1107 return &ic->ic_sup_rates[ieee80211_chan2mode(c)]; 1108} 1109 1110void 1111ieee80211_announce(struct ieee80211com *ic) 1112{ 1113 struct ifnet *ifp = ic->ic_ifp; 1114 int i, mode, rate, mword; 1115 const struct ieee80211_rateset *rs; 1116 1117 /* NB: skip AUTO since it has no rates */ 1118 for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) { 1119 if (isclr(ic->ic_modecaps, mode)) 1120 continue; 1121 if_printf(ifp, "%s rates: ", ieee80211_phymode_name[mode]); 1122 rs = &ic->ic_sup_rates[mode]; 1123 for (i = 0; i < rs->rs_nrates; i++) { 1124 mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode); 1125 if (mword == 0) 1126 continue; 1127 rate = ieee80211_media2rate(mword); 1128 printf("%s%d%sMbps", (i != 0 ? " " : ""), 1129 rate / 2, ((rate & 0x1) != 0 ? ".5" : "")); 1130 } 1131 printf("\n"); 1132 } 1133 ieee80211_ht_announce(ic); 1134} 1135 1136void 1137ieee80211_announce_channels(struct ieee80211com *ic) 1138{ 1139 const struct ieee80211_channel *c; 1140 char type; 1141 int i, cw; 1142 1143 printf("Chan Freq CW RegPwr MinPwr MaxPwr\n"); 1144 for (i = 0; i < ic->ic_nchans; i++) { 1145 c = &ic->ic_channels[i]; 1146 if (IEEE80211_IS_CHAN_ST(c)) 1147 type = 'S'; 1148 else if (IEEE80211_IS_CHAN_108A(c)) 1149 type = 'T'; 1150 else if (IEEE80211_IS_CHAN_108G(c)) 1151 type = 'G'; 1152 else if (IEEE80211_IS_CHAN_HT(c)) 1153 type = 'n'; 1154 else if (IEEE80211_IS_CHAN_A(c)) 1155 type = 'a'; 1156 else if (IEEE80211_IS_CHAN_ANYG(c)) 1157 type = 'g'; 1158 else if (IEEE80211_IS_CHAN_B(c)) 1159 type = 'b'; 1160 else 1161 type = 'f'; 1162 if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c)) 1163 cw = 40; 1164 else if (IEEE80211_IS_CHAN_HALF(c)) 1165 cw = 10; 1166 else if (IEEE80211_IS_CHAN_QUARTER(c)) 1167 cw = 5; 1168 else 1169 cw = 20; 1170 printf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n" 1171 , c->ic_ieee, c->ic_freq, type 1172 , cw 1173 , IEEE80211_IS_CHAN_HT40U(c) ? '+' : 1174 IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' ' 1175 , c->ic_maxregpower 1176 , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0 1177 , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0 1178 ); 1179 } 1180} 1181 1182static int 1183media2mode(const struct ifmedia_entry *ime, uint32_t flags, uint16_t *mode) 1184{ 1185 switch (IFM_MODE(ime->ifm_media)) { 1186 case IFM_IEEE80211_11A: 1187 *mode = IEEE80211_MODE_11A; 1188 break; 1189 case IFM_IEEE80211_11B: 1190 *mode = IEEE80211_MODE_11B; 1191 break; 1192 case IFM_IEEE80211_11G: 1193 *mode = IEEE80211_MODE_11G; 1194 break; 1195 case IFM_IEEE80211_FH: 1196 *mode = IEEE80211_MODE_FH; 1197 break; 1198 case IFM_IEEE80211_11NA: 1199 *mode = IEEE80211_MODE_11NA; 1200 break; 1201 case IFM_IEEE80211_11NG: 1202 *mode = IEEE80211_MODE_11NG; 1203 break; 1204 case IFM_AUTO: 1205 *mode = IEEE80211_MODE_AUTO; 1206 break; 1207 default: 1208 return 0; 1209 } 1210 /* 1211 * Turbo mode is an ``option''. 1212 * XXX does not apply to AUTO 1213 */ 1214 if (ime->ifm_media & IFM_IEEE80211_TURBO) { 1215 if (*mode == IEEE80211_MODE_11A) { 1216 if (flags & IEEE80211_F_TURBOP) 1217 *mode = IEEE80211_MODE_TURBO_A; 1218 else 1219 *mode = IEEE80211_MODE_STURBO_A; 1220 } else if (*mode == IEEE80211_MODE_11G) 1221 *mode = IEEE80211_MODE_TURBO_G; 1222 else 1223 return 0; 1224 } 1225 /* XXX HT40 +/- */ 1226 return 1; 1227} 1228 1229/* 1230 * Handle a media change request on the underlying interface. 1231 */ 1232int 1233ieee80211com_media_change(struct ifnet *ifp) 1234{ 1235 return EINVAL; 1236} 1237 1238/* 1239 * Handle a media change request on the vap interface. 1240 */ 1241int 1242ieee80211_media_change(struct ifnet *ifp) 1243{ 1244 struct ieee80211vap *vap = ifp->if_softc; 1245 struct ifmedia_entry *ime = vap->iv_media.ifm_cur; 1246 uint16_t newmode; 1247 1248 if (!media2mode(ime, vap->iv_flags, &newmode)) 1249 return EINVAL; 1250 if (vap->iv_des_mode != newmode) { 1251 vap->iv_des_mode = newmode; 1252 /* XXX kick state machine if up+running */ 1253 } 1254 return 0; 1255} 1256 1257/* 1258 * Common code to calculate the media status word 1259 * from the operating mode and channel state. 1260 */ 1261static int 1262media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan) 1263{ 1264 int status; 1265 1266 status = IFM_IEEE80211; 1267 switch (opmode) { 1268 case IEEE80211_M_STA: 1269 break; 1270 case IEEE80211_M_IBSS: 1271 status |= IFM_IEEE80211_ADHOC; 1272 break; 1273 case IEEE80211_M_HOSTAP: 1274 status |= IFM_IEEE80211_HOSTAP; 1275 break; 1276 case IEEE80211_M_MONITOR: 1277 status |= IFM_IEEE80211_MONITOR; 1278 break; 1279 case IEEE80211_M_AHDEMO: 1280 status |= IFM_IEEE80211_ADHOC | IFM_FLAG0; 1281 break; 1282 case IEEE80211_M_WDS: 1283 status |= IFM_IEEE80211_WDS; 1284 break; 1285 case IEEE80211_M_MBSS: 1286 status |= IFM_IEEE80211_MBSS; 1287 break; 1288 } 1289 if (IEEE80211_IS_CHAN_HTA(chan)) { 1290 status |= IFM_IEEE80211_11NA; 1291 } else if (IEEE80211_IS_CHAN_HTG(chan)) { 1292 status |= IFM_IEEE80211_11NG; 1293 } else if (IEEE80211_IS_CHAN_A(chan)) { 1294 status |= IFM_IEEE80211_11A; 1295 } else if (IEEE80211_IS_CHAN_B(chan)) { 1296 status |= IFM_IEEE80211_11B; 1297 } else if (IEEE80211_IS_CHAN_ANYG(chan)) { 1298 status |= IFM_IEEE80211_11G; 1299 } else if (IEEE80211_IS_CHAN_FHSS(chan)) { 1300 status |= IFM_IEEE80211_FH; 1301 } 1302 /* XXX else complain? */ 1303 1304 if (IEEE80211_IS_CHAN_TURBO(chan)) 1305 status |= IFM_IEEE80211_TURBO; 1306#if 0 1307 if (IEEE80211_IS_CHAN_HT20(chan)) 1308 status |= IFM_IEEE80211_HT20; 1309 if (IEEE80211_IS_CHAN_HT40(chan)) 1310 status |= IFM_IEEE80211_HT40; 1311#endif 1312 return status; 1313} 1314 1315static void 1316ieee80211com_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1317{ 1318 struct ieee80211com *ic = ifp->if_l2com; 1319 struct ieee80211vap *vap; 1320 1321 imr->ifm_status = IFM_AVALID; 1322 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1323 if (vap->iv_ifp->if_flags & IFF_UP) { 1324 imr->ifm_status |= IFM_ACTIVE; 1325 break; 1326 } 1327 imr->ifm_active = media_status(ic->ic_opmode, ic->ic_curchan); 1328 if (imr->ifm_status & IFM_ACTIVE) 1329 imr->ifm_current = imr->ifm_active; 1330} 1331 1332void 1333ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1334{ 1335 struct ieee80211vap *vap = ifp->if_softc; 1336 struct ieee80211com *ic = vap->iv_ic; 1337 enum ieee80211_phymode mode; 1338 1339 imr->ifm_status = IFM_AVALID; 1340 /* 1341 * NB: use the current channel's mode to lock down a xmit 1342 * rate only when running; otherwise we may have a mismatch 1343 * in which case the rate will not be convertible. 1344 */ 1345 if (vap->iv_state == IEEE80211_S_RUN) { 1346 imr->ifm_status |= IFM_ACTIVE; 1347 mode = ieee80211_chan2mode(ic->ic_curchan); 1348 } else 1349 mode = IEEE80211_MODE_AUTO; 1350 imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan); 1351 /* 1352 * Calculate a current rate if possible. 1353 */ 1354 if (vap->iv_txparms[mode].ucastrate != IEEE80211_FIXED_RATE_NONE) { 1355 /* 1356 * A fixed rate is set, report that. 1357 */ 1358 imr->ifm_active |= ieee80211_rate2media(ic, 1359 vap->iv_txparms[mode].ucastrate, mode); 1360 } else if (vap->iv_opmode == IEEE80211_M_STA) { 1361 /* 1362 * In station mode report the current transmit rate. 1363 */ 1364 imr->ifm_active |= ieee80211_rate2media(ic, 1365 vap->iv_bss->ni_txrate, mode); 1366 } else 1367 imr->ifm_active |= IFM_AUTO; 1368 if (imr->ifm_status & IFM_ACTIVE) 1369 imr->ifm_current = imr->ifm_active; 1370} 1371 1372/* 1373 * Set the current phy mode and recalculate the active channel 1374 * set based on the available channels for this mode. Also 1375 * select a new default/current channel if the current one is 1376 * inappropriate for this mode. 1377 */ 1378int 1379ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode) 1380{ 1381 /* 1382 * Adjust basic rates in 11b/11g supported rate set. 1383 * Note that if operating on a hal/quarter rate channel 1384 * this is a noop as those rates sets are different 1385 * and used instead. 1386 */ 1387 if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B) 1388 ieee80211_setbasicrates(&ic->ic_sup_rates[mode], mode); 1389 1390 ic->ic_curmode = mode; 1391 ieee80211_reset_erp(ic); /* reset ERP state */ 1392 1393 return 0; 1394} 1395 1396/* 1397 * Return the phy mode for with the specified channel. 1398 */ 1399enum ieee80211_phymode 1400ieee80211_chan2mode(const struct ieee80211_channel *chan) 1401{ 1402 1403 if (IEEE80211_IS_CHAN_HTA(chan)) 1404 return IEEE80211_MODE_11NA; 1405 else if (IEEE80211_IS_CHAN_HTG(chan)) 1406 return IEEE80211_MODE_11NG; 1407 else if (IEEE80211_IS_CHAN_108G(chan)) 1408 return IEEE80211_MODE_TURBO_G; 1409 else if (IEEE80211_IS_CHAN_ST(chan)) 1410 return IEEE80211_MODE_STURBO_A; 1411 else if (IEEE80211_IS_CHAN_TURBO(chan)) 1412 return IEEE80211_MODE_TURBO_A; 1413 else if (IEEE80211_IS_CHAN_HALF(chan)) 1414 return IEEE80211_MODE_HALF; 1415 else if (IEEE80211_IS_CHAN_QUARTER(chan)) 1416 return IEEE80211_MODE_QUARTER; 1417 else if (IEEE80211_IS_CHAN_A(chan)) 1418 return IEEE80211_MODE_11A; 1419 else if (IEEE80211_IS_CHAN_ANYG(chan)) 1420 return IEEE80211_MODE_11G; 1421 else if (IEEE80211_IS_CHAN_B(chan)) 1422 return IEEE80211_MODE_11B; 1423 else if (IEEE80211_IS_CHAN_FHSS(chan)) 1424 return IEEE80211_MODE_FH; 1425 1426 /* NB: should not get here */ 1427 printf("%s: cannot map channel to mode; freq %u flags 0x%x\n", 1428 __func__, chan->ic_freq, chan->ic_flags); 1429 return IEEE80211_MODE_11B; 1430} 1431 1432struct ratemedia { 1433 u_int match; /* rate + mode */ 1434 u_int media; /* if_media rate */ 1435}; 1436 1437static int 1438findmedia(const struct ratemedia rates[], int n, u_int match) 1439{ 1440 int i; 1441 1442 for (i = 0; i < n; i++) 1443 if (rates[i].match == match) 1444 return rates[i].media; 1445 return IFM_AUTO; 1446} 1447 1448/* 1449 * Convert IEEE80211 rate value to ifmedia subtype. 1450 * Rate is either a legacy rate in units of 0.5Mbps 1451 * or an MCS index. 1452 */ 1453int 1454ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode) 1455{ 1456#define N(a) (sizeof(a) / sizeof(a[0])) 1457 static const struct ratemedia rates[] = { 1458 { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 }, 1459 { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 }, 1460 { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 }, 1461 { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 }, 1462 { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 }, 1463 { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 }, 1464 { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 }, 1465 { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 }, 1466 { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 }, 1467 { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 }, 1468 { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 }, 1469 { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 }, 1470 { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 }, 1471 { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 }, 1472 { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 }, 1473 { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 }, 1474 { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 }, 1475 { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 }, 1476 { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 }, 1477 { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 }, 1478 { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 }, 1479 { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 }, 1480 { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 }, 1481 { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 }, 1482 { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 }, 1483 { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 }, 1484 { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 }, 1485 { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 }, 1486 { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 }, 1487 { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 }, 1488 /* NB: OFDM72 doesn't realy exist so we don't handle it */ 1489 }; 1490 static const struct ratemedia htrates[] = { 1491 { 0, IFM_IEEE80211_MCS }, 1492 { 1, IFM_IEEE80211_MCS }, 1493 { 2, IFM_IEEE80211_MCS }, 1494 { 3, IFM_IEEE80211_MCS }, 1495 { 4, IFM_IEEE80211_MCS }, 1496 { 5, IFM_IEEE80211_MCS }, 1497 { 6, IFM_IEEE80211_MCS }, 1498 { 7, IFM_IEEE80211_MCS }, 1499 { 8, IFM_IEEE80211_MCS }, 1500 { 9, IFM_IEEE80211_MCS }, 1501 { 10, IFM_IEEE80211_MCS }, 1502 { 11, IFM_IEEE80211_MCS }, 1503 { 12, IFM_IEEE80211_MCS }, 1504 { 13, IFM_IEEE80211_MCS }, 1505 { 14, IFM_IEEE80211_MCS }, 1506 { 15, IFM_IEEE80211_MCS }, 1507 }; 1508 int m; 1509 1510 /* 1511 * Check 11n rates first for match as an MCS. 1512 */ 1513 if (mode == IEEE80211_MODE_11NA) { 1514 if (rate & IEEE80211_RATE_MCS) { 1515 rate &= ~IEEE80211_RATE_MCS; 1516 m = findmedia(htrates, N(htrates), rate); 1517 if (m != IFM_AUTO) 1518 return m | IFM_IEEE80211_11NA; 1519 } 1520 } else if (mode == IEEE80211_MODE_11NG) { 1521 /* NB: 12 is ambiguous, it will be treated as an MCS */ 1522 if (rate & IEEE80211_RATE_MCS) { 1523 rate &= ~IEEE80211_RATE_MCS; 1524 m = findmedia(htrates, N(htrates), rate); 1525 if (m != IFM_AUTO) 1526 return m | IFM_IEEE80211_11NG; 1527 } 1528 } 1529 rate &= IEEE80211_RATE_VAL; 1530 switch (mode) { 1531 case IEEE80211_MODE_11A: 1532 case IEEE80211_MODE_HALF: /* XXX good 'nuf */ 1533 case IEEE80211_MODE_QUARTER: 1534 case IEEE80211_MODE_11NA: 1535 case IEEE80211_MODE_TURBO_A: 1536 case IEEE80211_MODE_STURBO_A: 1537 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11A); 1538 case IEEE80211_MODE_11B: 1539 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11B); 1540 case IEEE80211_MODE_FH: 1541 return findmedia(rates, N(rates), rate | IFM_IEEE80211_FH); 1542 case IEEE80211_MODE_AUTO: 1543 /* NB: ic may be NULL for some drivers */ 1544 if (ic != NULL && ic->ic_phytype == IEEE80211_T_FH) 1545 return findmedia(rates, N(rates), 1546 rate | IFM_IEEE80211_FH); 1547 /* NB: hack, 11g matches both 11b+11a rates */ 1548 /* fall thru... */ 1549 case IEEE80211_MODE_11G: 1550 case IEEE80211_MODE_11NG: 1551 case IEEE80211_MODE_TURBO_G: 1552 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11G); 1553 } 1554 return IFM_AUTO; 1555#undef N 1556} 1557 1558int 1559ieee80211_media2rate(int mword) 1560{ 1561#define N(a) (sizeof(a) / sizeof(a[0])) 1562 static const int ieeerates[] = { 1563 -1, /* IFM_AUTO */ 1564 0, /* IFM_MANUAL */ 1565 0, /* IFM_NONE */ 1566 2, /* IFM_IEEE80211_FH1 */ 1567 4, /* IFM_IEEE80211_FH2 */ 1568 2, /* IFM_IEEE80211_DS1 */ 1569 4, /* IFM_IEEE80211_DS2 */ 1570 11, /* IFM_IEEE80211_DS5 */ 1571 22, /* IFM_IEEE80211_DS11 */ 1572 44, /* IFM_IEEE80211_DS22 */ 1573 12, /* IFM_IEEE80211_OFDM6 */ 1574 18, /* IFM_IEEE80211_OFDM9 */ 1575 24, /* IFM_IEEE80211_OFDM12 */ 1576 36, /* IFM_IEEE80211_OFDM18 */ 1577 48, /* IFM_IEEE80211_OFDM24 */ 1578 72, /* IFM_IEEE80211_OFDM36 */ 1579 96, /* IFM_IEEE80211_OFDM48 */ 1580 108, /* IFM_IEEE80211_OFDM54 */ 1581 144, /* IFM_IEEE80211_OFDM72 */ 1582 0, /* IFM_IEEE80211_DS354k */ 1583 0, /* IFM_IEEE80211_DS512k */ 1584 6, /* IFM_IEEE80211_OFDM3 */ 1585 9, /* IFM_IEEE80211_OFDM4 */ 1586 54, /* IFM_IEEE80211_OFDM27 */ 1587 -1, /* IFM_IEEE80211_MCS */ 1588 }; 1589 return IFM_SUBTYPE(mword) < N(ieeerates) ? 1590 ieeerates[IFM_SUBTYPE(mword)] : 0; 1591#undef N 1592} 1593 1594/* 1595 * The following hash function is adapted from "Hash Functions" by Bob Jenkins 1596 * ("Algorithm Alley", Dr. Dobbs Journal, September 1997). 1597 */ 1598#define mix(a, b, c) \ 1599do { \ 1600 a -= b; a -= c; a ^= (c >> 13); \ 1601 b -= c; b -= a; b ^= (a << 8); \ 1602 c -= a; c -= b; c ^= (b >> 13); \ 1603 a -= b; a -= c; a ^= (c >> 12); \ 1604 b -= c; b -= a; b ^= (a << 16); \ 1605 c -= a; c -= b; c ^= (b >> 5); \ 1606 a -= b; a -= c; a ^= (c >> 3); \ 1607 b -= c; b -= a; b ^= (a << 10); \ 1608 c -= a; c -= b; c ^= (b >> 15); \ 1609} while (/*CONSTCOND*/0) 1610 1611uint32_t 1612ieee80211_mac_hash(const struct ieee80211com *ic, 1613 const uint8_t addr[IEEE80211_ADDR_LEN]) 1614{ 1615 uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = ic->ic_hash_key; 1616 1617 b += addr[5] << 8; 1618 b += addr[4]; 1619 a += addr[3] << 24; 1620 a += addr[2] << 16; 1621 a += addr[1] << 8; 1622 a += addr[0]; 1623 1624 mix(a, b, c); 1625 1626 return c; 1627} 1628#undef mix 1629