ieee80211.c revision 193843
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 193843 2009-06-09 17:11:41Z sam $"); 29 30/* 31 * IEEE 802.11 generic handler 32 */ 33#include "opt_wlan.h" 34 35#include <sys/param.h> 36#include <sys/systm.h> 37#include <sys/kernel.h> 38 39#include <sys/socket.h> 40 41#include <net/if.h> 42#include <net/if_dl.h> 43#include <net/if_media.h> 44#include <net/if_types.h> 45#include <net/ethernet.h> 46 47#include <net80211/ieee80211_var.h> 48#include <net80211/ieee80211_regdomain.h> 49#ifdef IEEE80211_SUPPORT_SUPERG 50#include <net80211/ieee80211_superg.h> 51#endif 52 53#include <net/bpf.h> 54 55const char *ieee80211_phymode_name[IEEE80211_MODE_MAX] = { 56 [IEEE80211_MODE_AUTO] = "auto", 57 [IEEE80211_MODE_11A] = "11a", 58 [IEEE80211_MODE_11B] = "11b", 59 [IEEE80211_MODE_11G] = "11g", 60 [IEEE80211_MODE_FH] = "FH", 61 [IEEE80211_MODE_TURBO_A] = "turboA", 62 [IEEE80211_MODE_TURBO_G] = "turboG", 63 [IEEE80211_MODE_STURBO_A] = "sturboA", 64 [IEEE80211_MODE_HALF] = "half", 65 [IEEE80211_MODE_QUARTER] = "quarter", 66 [IEEE80211_MODE_11NA] = "11na", 67 [IEEE80211_MODE_11NG] = "11ng", 68}; 69/* map ieee80211_opmode to the corresponding capability bit */ 70const int ieee80211_opcap[IEEE80211_OPMODE_MAX] = { 71 [IEEE80211_M_IBSS] = IEEE80211_C_IBSS, 72 [IEEE80211_M_WDS] = IEEE80211_C_WDS, 73 [IEEE80211_M_STA] = IEEE80211_C_STA, 74 [IEEE80211_M_AHDEMO] = IEEE80211_C_AHDEMO, 75 [IEEE80211_M_HOSTAP] = IEEE80211_C_HOSTAP, 76 [IEEE80211_M_MONITOR] = IEEE80211_C_MONITOR, 77}; 78 79static const uint8_t ieee80211broadcastaddr[IEEE80211_ADDR_LEN] = 80 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 81 82static void ieee80211_syncflag_locked(struct ieee80211com *ic, int flag); 83static void ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag); 84static void ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag); 85static int ieee80211_media_setup(struct ieee80211com *ic, 86 struct ifmedia *media, int caps, int addsta, 87 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat); 88static void ieee80211com_media_status(struct ifnet *, struct ifmediareq *); 89static int ieee80211com_media_change(struct ifnet *); 90static int media_status(enum ieee80211_opmode, 91 const struct ieee80211_channel *); 92 93MALLOC_DEFINE(M_80211_VAP, "80211vap", "802.11 vap state"); 94 95/* 96 * Default supported rates for 802.11 operation (in IEEE .5Mb units). 97 */ 98#define B(r) ((r) | IEEE80211_RATE_BASIC) 99static const struct ieee80211_rateset ieee80211_rateset_11a = 100 { 8, { B(12), 18, B(24), 36, B(48), 72, 96, 108 } }; 101static const struct ieee80211_rateset ieee80211_rateset_half = 102 { 8, { B(6), 9, B(12), 18, B(24), 36, 48, 54 } }; 103static const struct ieee80211_rateset ieee80211_rateset_quarter = 104 { 8, { B(3), 4, B(6), 9, B(12), 18, 24, 27 } }; 105static const struct ieee80211_rateset ieee80211_rateset_11b = 106 { 4, { B(2), B(4), B(11), B(22) } }; 107/* NB: OFDM rates are handled specially based on mode */ 108static const struct ieee80211_rateset ieee80211_rateset_11g = 109 { 12, { B(2), B(4), B(11), B(22), 12, 18, 24, 36, 48, 72, 96, 108 } }; 110#undef B 111 112/* 113 * Fill in 802.11 available channel set, mark 114 * all available channels as active, and pick 115 * a default channel if not already specified. 116 */ 117static void 118ieee80211_chan_init(struct ieee80211com *ic) 119{ 120#define DEFAULTRATES(m, def) do { \ 121 if (ic->ic_sup_rates[m].rs_nrates == 0) \ 122 ic->ic_sup_rates[m] = def; \ 123} while (0) 124 struct ieee80211_channel *c; 125 int i; 126 127 KASSERT(0 < ic->ic_nchans && ic->ic_nchans <= IEEE80211_CHAN_MAX, 128 ("invalid number of channels specified: %u", ic->ic_nchans)); 129 memset(ic->ic_chan_avail, 0, sizeof(ic->ic_chan_avail)); 130 memset(ic->ic_modecaps, 0, sizeof(ic->ic_modecaps)); 131 setbit(ic->ic_modecaps, IEEE80211_MODE_AUTO); 132 for (i = 0; i < ic->ic_nchans; i++) { 133 c = &ic->ic_channels[i]; 134 KASSERT(c->ic_flags != 0, ("channel with no flags")); 135 /* 136 * Help drivers that work only with frequencies by filling 137 * in IEEE channel #'s if not already calculated. Note this 138 * mimics similar work done in ieee80211_setregdomain when 139 * changing regulatory state. 140 */ 141 if (c->ic_ieee == 0) 142 c->ic_ieee = ieee80211_mhz2ieee(c->ic_freq,c->ic_flags); 143 if (IEEE80211_IS_CHAN_HT40(c) && c->ic_extieee == 0) 144 c->ic_extieee = ieee80211_mhz2ieee(c->ic_freq + 145 (IEEE80211_IS_CHAN_HT40U(c) ? 20 : -20), 146 c->ic_flags); 147 /* default max tx power to max regulatory */ 148 if (c->ic_maxpower == 0) 149 c->ic_maxpower = 2*c->ic_maxregpower; 150 setbit(ic->ic_chan_avail, c->ic_ieee); 151 /* 152 * Identify mode capabilities. 153 */ 154 if (IEEE80211_IS_CHAN_A(c)) 155 setbit(ic->ic_modecaps, IEEE80211_MODE_11A); 156 if (IEEE80211_IS_CHAN_B(c)) 157 setbit(ic->ic_modecaps, IEEE80211_MODE_11B); 158 if (IEEE80211_IS_CHAN_ANYG(c)) 159 setbit(ic->ic_modecaps, IEEE80211_MODE_11G); 160 if (IEEE80211_IS_CHAN_FHSS(c)) 161 setbit(ic->ic_modecaps, IEEE80211_MODE_FH); 162 if (IEEE80211_IS_CHAN_108A(c)) 163 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_A); 164 if (IEEE80211_IS_CHAN_108G(c)) 165 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_G); 166 if (IEEE80211_IS_CHAN_ST(c)) 167 setbit(ic->ic_modecaps, IEEE80211_MODE_STURBO_A); 168 if (IEEE80211_IS_CHAN_HALF(c)) 169 setbit(ic->ic_modecaps, IEEE80211_MODE_HALF); 170 if (IEEE80211_IS_CHAN_QUARTER(c)) 171 setbit(ic->ic_modecaps, IEEE80211_MODE_QUARTER); 172 if (IEEE80211_IS_CHAN_HTA(c)) 173 setbit(ic->ic_modecaps, IEEE80211_MODE_11NA); 174 if (IEEE80211_IS_CHAN_HTG(c)) 175 setbit(ic->ic_modecaps, IEEE80211_MODE_11NG); 176 } 177 /* initialize candidate channels to all available */ 178 memcpy(ic->ic_chan_active, ic->ic_chan_avail, 179 sizeof(ic->ic_chan_avail)); 180 181 /* sort channel table to allow lookup optimizations */ 182 ieee80211_sort_channels(ic->ic_channels, ic->ic_nchans); 183 184 /* invalidate any previous state */ 185 ic->ic_bsschan = IEEE80211_CHAN_ANYC; 186 ic->ic_prevchan = NULL; 187 ic->ic_csa_newchan = NULL; 188 /* arbitrarily pick the first channel */ 189 ic->ic_curchan = &ic->ic_channels[0]; 190 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 191 192 /* fillin well-known rate sets if driver has not specified */ 193 DEFAULTRATES(IEEE80211_MODE_11B, ieee80211_rateset_11b); 194 DEFAULTRATES(IEEE80211_MODE_11G, ieee80211_rateset_11g); 195 DEFAULTRATES(IEEE80211_MODE_11A, ieee80211_rateset_11a); 196 DEFAULTRATES(IEEE80211_MODE_TURBO_A, ieee80211_rateset_11a); 197 DEFAULTRATES(IEEE80211_MODE_TURBO_G, ieee80211_rateset_11g); 198 DEFAULTRATES(IEEE80211_MODE_STURBO_A, ieee80211_rateset_11a); 199 DEFAULTRATES(IEEE80211_MODE_HALF, ieee80211_rateset_half); 200 DEFAULTRATES(IEEE80211_MODE_QUARTER, ieee80211_rateset_quarter); 201 DEFAULTRATES(IEEE80211_MODE_11NA, ieee80211_rateset_11a); 202 DEFAULTRATES(IEEE80211_MODE_11NG, ieee80211_rateset_11g); 203 204 /* 205 * Set auto mode to reset active channel state and any desired channel. 206 */ 207 (void) ieee80211_setmode(ic, IEEE80211_MODE_AUTO); 208#undef DEFAULTRATES 209} 210 211static void 212null_update_mcast(struct ifnet *ifp) 213{ 214 if_printf(ifp, "need multicast update callback\n"); 215} 216 217static void 218null_update_promisc(struct ifnet *ifp) 219{ 220 if_printf(ifp, "need promiscuous mode update callback\n"); 221} 222 223static int 224null_output(struct ifnet *ifp, struct mbuf *m, 225 struct sockaddr *dst, struct route *ro) 226{ 227 if_printf(ifp, "discard raw packet\n"); 228 m_freem(m); 229 return EIO; 230} 231 232static void 233null_input(struct ifnet *ifp, struct mbuf *m) 234{ 235 if_printf(ifp, "if_input should not be called\n"); 236 m_freem(m); 237} 238 239/* 240 * Attach/setup the common net80211 state. Called by 241 * the driver on attach to prior to creating any vap's. 242 */ 243void 244ieee80211_ifattach(struct ieee80211com *ic, 245 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 246{ 247 struct ifnet *ifp = ic->ic_ifp; 248 struct sockaddr_dl *sdl; 249 struct ifaddr *ifa; 250 251 KASSERT(ifp->if_type == IFT_IEEE80211, ("if_type %d", ifp->if_type)); 252 253 IEEE80211_LOCK_INIT(ic, ifp->if_xname); 254 TAILQ_INIT(&ic->ic_vaps); 255 256 /* Create a taskqueue for all state changes */ 257 ic->ic_tq = taskqueue_create("ic_taskq", M_WAITOK | M_ZERO, 258 taskqueue_thread_enqueue, &ic->ic_tq); 259 taskqueue_start_threads(&ic->ic_tq, 1, PI_NET, "%s taskq", 260 ifp->if_xname); 261 /* 262 * Fill in 802.11 available channel set, mark all 263 * available channels as active, and pick a default 264 * channel if not already specified. 265 */ 266 ieee80211_media_init(ic); 267 268 ic->ic_update_mcast = null_update_mcast; 269 ic->ic_update_promisc = null_update_promisc; 270 271 ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT; 272 ic->ic_lintval = ic->ic_bintval; 273 ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX; 274 275 ieee80211_crypto_attach(ic); 276 ieee80211_node_attach(ic); 277 ieee80211_power_attach(ic); 278 ieee80211_proto_attach(ic); 279#ifdef IEEE80211_SUPPORT_SUPERG 280 ieee80211_superg_attach(ic); 281#endif 282 ieee80211_ht_attach(ic); 283 ieee80211_scan_attach(ic); 284 ieee80211_regdomain_attach(ic); 285 ieee80211_dfs_attach(ic); 286 287 ieee80211_sysctl_attach(ic); 288 289 ifp->if_addrlen = IEEE80211_ADDR_LEN; 290 ifp->if_hdrlen = 0; 291 if_attach(ifp); 292 ifp->if_mtu = IEEE80211_MTU_MAX; 293 ifp->if_broadcastaddr = ieee80211broadcastaddr; 294 ifp->if_output = null_output; 295 ifp->if_input = null_input; /* just in case */ 296 ifp->if_resolvemulti = NULL; /* NB: callers check */ 297 298 ifa = ifaddr_byindex(ifp->if_index); 299 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); 300 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 301 sdl->sdl_type = IFT_ETHER; /* XXX IFT_IEEE80211? */ 302 sdl->sdl_alen = IEEE80211_ADDR_LEN; 303 IEEE80211_ADDR_COPY(LLADDR(sdl), macaddr); 304} 305 306/* 307 * Detach net80211 state on device detach. Tear down 308 * all vap's and reclaim all common state prior to the 309 * device state going away. Note we may call back into 310 * driver; it must be prepared for this. 311 */ 312void 313ieee80211_ifdetach(struct ieee80211com *ic) 314{ 315 struct ifnet *ifp = ic->ic_ifp; 316 struct ieee80211vap *vap; 317 318 if_detach(ifp); 319 320 while ((vap = TAILQ_FIRST(&ic->ic_vaps)) != NULL) 321 ieee80211_vap_destroy(vap); 322 ieee80211_waitfor_parent(ic); 323 324 ieee80211_sysctl_detach(ic); 325 ieee80211_dfs_detach(ic); 326 ieee80211_regdomain_detach(ic); 327 ieee80211_scan_detach(ic); 328#ifdef IEEE80211_SUPPORT_SUPERG 329 ieee80211_superg_detach(ic); 330#endif 331 ieee80211_ht_detach(ic); 332 /* NB: must be called before ieee80211_node_detach */ 333 ieee80211_proto_detach(ic); 334 ieee80211_crypto_detach(ic); 335 ieee80211_power_detach(ic); 336 ieee80211_node_detach(ic); 337 338 ifmedia_removeall(&ic->ic_media); 339 taskqueue_free(ic->ic_tq); 340 IEEE80211_LOCK_DESTROY(ic); 341} 342 343/* 344 * Default reset method for use with the ioctl support. This 345 * method is invoked after any state change in the 802.11 346 * layer that should be propagated to the hardware but not 347 * require re-initialization of the 802.11 state machine (e.g 348 * rescanning for an ap). We always return ENETRESET which 349 * should cause the driver to re-initialize the device. Drivers 350 * can override this method to implement more optimized support. 351 */ 352static int 353default_reset(struct ieee80211vap *vap, u_long cmd) 354{ 355 return ENETRESET; 356} 357 358/* 359 * Prepare a vap for use. Drivers use this call to 360 * setup net80211 state in new vap's prior attaching 361 * them with ieee80211_vap_attach (below). 362 */ 363int 364ieee80211_vap_setup(struct ieee80211com *ic, struct ieee80211vap *vap, 365 const char name[IFNAMSIZ], int unit, int opmode, int flags, 366 const uint8_t bssid[IEEE80211_ADDR_LEN], 367 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 368{ 369 struct ifnet *ifp; 370 371 ifp = if_alloc(IFT_ETHER); 372 if (ifp == NULL) { 373 if_printf(ic->ic_ifp, "%s: unable to allocate ifnet\n", 374 __func__); 375 return ENOMEM; 376 } 377 if_initname(ifp, name, unit); 378 ifp->if_softc = vap; /* back pointer */ 379 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 380 ifp->if_start = ieee80211_start; 381 ifp->if_ioctl = ieee80211_ioctl; 382 ifp->if_watchdog = NULL; /* NB: no watchdog routine */ 383 ifp->if_init = ieee80211_init; 384 /* NB: input+output filled in by ether_ifattach */ 385 IFQ_SET_MAXLEN(&ifp->if_snd, IFQ_MAXLEN); 386 ifp->if_snd.ifq_drv_maxlen = IFQ_MAXLEN; 387 IFQ_SET_READY(&ifp->if_snd); 388 389 vap->iv_ifp = ifp; 390 vap->iv_ic = ic; 391 vap->iv_flags = ic->ic_flags; /* propagate common flags */ 392 vap->iv_flags_ext = ic->ic_flags_ext; 393 vap->iv_flags_ven = ic->ic_flags_ven; 394 vap->iv_caps = ic->ic_caps &~ IEEE80211_C_OPMODE; 395 vap->iv_htcaps = ic->ic_htcaps; 396 vap->iv_opmode = opmode; 397 vap->iv_caps |= ieee80211_opcap[opmode]; 398 switch (opmode) { 399 case IEEE80211_M_WDS: 400 /* 401 * WDS links must specify the bssid of the far end. 402 * For legacy operation this is a static relationship. 403 * For non-legacy operation the station must associate 404 * and be authorized to pass traffic. Plumbing the 405 * vap to the proper node happens when the vap 406 * transitions to RUN state. 407 */ 408 IEEE80211_ADDR_COPY(vap->iv_des_bssid, bssid); 409 vap->iv_flags |= IEEE80211_F_DESBSSID; 410 if (flags & IEEE80211_CLONE_WDSLEGACY) 411 vap->iv_flags_ext |= IEEE80211_FEXT_WDSLEGACY; 412 break; 413#ifdef IEEE80211_SUPPORT_TDMA 414 case IEEE80211_M_AHDEMO: 415 if (flags & IEEE80211_CLONE_TDMA) { 416 /* NB: checked before clone operation allowed */ 417 KASSERT(ic->ic_caps & IEEE80211_C_TDMA, 418 ("not TDMA capable, ic_caps 0x%x", ic->ic_caps)); 419 /* 420 * Propagate TDMA capability to mark vap; this 421 * cannot be removed and is used to distinguish 422 * regular ahdemo operation from ahdemo+tdma. 423 */ 424 vap->iv_caps |= IEEE80211_C_TDMA; 425 } 426 break; 427#endif 428 } 429 /* auto-enable s/w beacon miss support */ 430 if (flags & IEEE80211_CLONE_NOBEACONS) 431 vap->iv_flags_ext |= IEEE80211_FEXT_SWBMISS; 432 /* 433 * Enable various functionality by default if we're 434 * capable; the driver can override us if it knows better. 435 */ 436 if (vap->iv_caps & IEEE80211_C_WME) 437 vap->iv_flags |= IEEE80211_F_WME; 438 if (vap->iv_caps & IEEE80211_C_BURST) 439 vap->iv_flags |= IEEE80211_F_BURST; 440 /* NB: bg scanning only makes sense for station mode right now */ 441 if (vap->iv_opmode == IEEE80211_M_STA && 442 (vap->iv_caps & IEEE80211_C_BGSCAN)) 443 vap->iv_flags |= IEEE80211_F_BGSCAN; 444 vap->iv_flags |= IEEE80211_F_DOTH; /* XXX no cap, just ena */ 445 /* NB: DFS support only makes sense for ap mode right now */ 446 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 447 (vap->iv_caps & IEEE80211_C_DFS)) 448 vap->iv_flags_ext |= IEEE80211_FEXT_DFS; 449 450 vap->iv_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */ 451 vap->iv_bmissthreshold = IEEE80211_HWBMISS_DEFAULT; 452 vap->iv_dtim_period = IEEE80211_DTIM_DEFAULT; 453 /* 454 * Install a default reset method for the ioctl support; 455 * the driver can override this. 456 */ 457 vap->iv_reset = default_reset; 458 459 IEEE80211_ADDR_COPY(vap->iv_myaddr, macaddr); 460 461 ieee80211_sysctl_vattach(vap); 462 ieee80211_crypto_vattach(vap); 463 ieee80211_node_vattach(vap); 464 ieee80211_power_vattach(vap); 465 ieee80211_proto_vattach(vap); 466#ifdef IEEE80211_SUPPORT_SUPERG 467 ieee80211_superg_vattach(vap); 468#endif 469 ieee80211_ht_vattach(vap); 470 ieee80211_scan_vattach(vap); 471 ieee80211_regdomain_vattach(vap); 472 ieee80211_radiotap_vattach(vap); 473 474 return 0; 475} 476 477/* 478 * Activate a vap. State should have been prepared with a 479 * call to ieee80211_vap_setup and by the driver. On return 480 * from this call the vap is ready for use. 481 */ 482int 483ieee80211_vap_attach(struct ieee80211vap *vap, 484 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) 485{ 486 struct ifnet *ifp = vap->iv_ifp; 487 struct ieee80211com *ic = vap->iv_ic; 488 struct ifmediareq imr; 489 int maxrate; 490 491 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 492 "%s: %s parent %s flags 0x%x flags_ext 0x%x\n", 493 __func__, ieee80211_opmode_name[vap->iv_opmode], 494 ic->ic_ifp->if_xname, vap->iv_flags, vap->iv_flags_ext); 495 496 /* 497 * Do late attach work that cannot happen until after 498 * the driver has had a chance to override defaults. 499 */ 500 ieee80211_node_latevattach(vap); 501 ieee80211_power_latevattach(vap); 502 503 maxrate = ieee80211_media_setup(ic, &vap->iv_media, vap->iv_caps, 504 vap->iv_opmode == IEEE80211_M_STA, media_change, media_stat); 505 ieee80211_media_status(ifp, &imr); 506 /* NB: strip explicit mode; we're actually in autoselect */ 507 ifmedia_set(&vap->iv_media, 508 imr.ifm_active &~ (IFM_MMASK | IFM_IEEE80211_TURBO)); 509 if (maxrate) 510 ifp->if_baudrate = IF_Mbps(maxrate); 511 512 ether_ifattach(ifp, vap->iv_myaddr); 513 /* hook output method setup by ether_ifattach */ 514 vap->iv_output = ifp->if_output; 515 ifp->if_output = ieee80211_output; 516 /* NB: if_mtu set by ether_ifattach to ETHERMTU */ 517 518 IEEE80211_LOCK(ic); 519 TAILQ_INSERT_TAIL(&ic->ic_vaps, vap, iv_next); 520 ieee80211_syncflag_locked(ic, IEEE80211_F_WME); 521#ifdef IEEE80211_SUPPORT_SUPERG 522 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); 523#endif 524 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); 525 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); 526 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT); 527 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40); 528 ieee80211_syncifflag_locked(ic, IFF_PROMISC); 529 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI); 530 IEEE80211_UNLOCK(ic); 531 532 return 1; 533} 534 535/* 536 * Tear down vap state and reclaim the ifnet. 537 * The driver is assumed to have prepared for 538 * this; e.g. by turning off interrupts for the 539 * underlying device. 540 */ 541void 542ieee80211_vap_detach(struct ieee80211vap *vap) 543{ 544 struct ieee80211com *ic = vap->iv_ic; 545 struct ifnet *ifp = vap->iv_ifp; 546 547 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s parent %s\n", 548 __func__, ieee80211_opmode_name[vap->iv_opmode], 549 ic->ic_ifp->if_xname); 550 551 /* NB: bpfdetach is called by ether_ifdetach and claims all taps */ 552 ether_ifdetach(ifp); 553 554 ieee80211_stop(vap); 555 556 /* 557 * Flush any deferred vap tasks. 558 * NB: must be before ether_ifdetach() and removal from ic_vaps list 559 */ 560 ieee80211_draintask(ic, &vap->iv_nstate_task); 561 ieee80211_draintask(ic, &vap->iv_swbmiss_task); 562 563 IEEE80211_LOCK(ic); 564 KASSERT(vap->iv_state == IEEE80211_S_INIT , ("vap still running")); 565 TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next); 566 ieee80211_syncflag_locked(ic, IEEE80211_F_WME); 567#ifdef IEEE80211_SUPPORT_SUPERG 568 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); 569#endif 570 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); 571 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); 572 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT); 573 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40); 574 /* NB: this handles the bpfdetach done below */ 575 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_BPF); 576 ieee80211_syncifflag_locked(ic, IFF_PROMISC); 577 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI); 578 IEEE80211_UNLOCK(ic); 579 580 ifmedia_removeall(&vap->iv_media); 581 582 ieee80211_radiotap_vdetach(vap); 583 ieee80211_regdomain_vdetach(vap); 584 ieee80211_scan_vdetach(vap); 585#ifdef IEEE80211_SUPPORT_SUPERG 586 ieee80211_superg_vdetach(vap); 587#endif 588 ieee80211_ht_vdetach(vap); 589 /* NB: must be before ieee80211_node_vdetach */ 590 ieee80211_proto_vdetach(vap); 591 ieee80211_crypto_vdetach(vap); 592 ieee80211_power_vdetach(vap); 593 ieee80211_node_vdetach(vap); 594 ieee80211_sysctl_vdetach(vap); 595 596 if_free(ifp); 597} 598 599/* 600 * Synchronize flag bit state in the parent ifnet structure 601 * according to the state of all vap ifnet's. This is used, 602 * for example, to handle IFF_PROMISC and IFF_ALLMULTI. 603 */ 604void 605ieee80211_syncifflag_locked(struct ieee80211com *ic, int flag) 606{ 607 struct ifnet *ifp = ic->ic_ifp; 608 struct ieee80211vap *vap; 609 int bit, oflags; 610 611 IEEE80211_LOCK_ASSERT(ic); 612 613 bit = 0; 614 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 615 if (vap->iv_ifp->if_flags & flag) { 616 /* 617 * XXX the bridge sets PROMISC but we don't want to 618 * enable it on the device, discard here so all the 619 * drivers don't need to special-case it 620 */ 621 if (flag == IFF_PROMISC && 622 vap->iv_opmode == IEEE80211_M_HOSTAP) 623 continue; 624 bit = 1; 625 break; 626 } 627 oflags = ifp->if_flags; 628 if (bit) 629 ifp->if_flags |= flag; 630 else 631 ifp->if_flags &= ~flag; 632 if ((ifp->if_flags ^ oflags) & flag) { 633 /* XXX should we return 1/0 and let caller do this? */ 634 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 635 if (flag == IFF_PROMISC) 636 ieee80211_runtask(ic, &ic->ic_promisc_task); 637 else if (flag == IFF_ALLMULTI) 638 ieee80211_runtask(ic, &ic->ic_mcast_task); 639 } 640 } 641} 642 643/* 644 * Synchronize flag bit state in the com structure 645 * according to the state of all vap's. This is used, 646 * for example, to handle state changes via ioctls. 647 */ 648static void 649ieee80211_syncflag_locked(struct ieee80211com *ic, int flag) 650{ 651 struct ieee80211vap *vap; 652 int bit; 653 654 IEEE80211_LOCK_ASSERT(ic); 655 656 bit = 0; 657 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 658 if (vap->iv_flags & flag) { 659 bit = 1; 660 break; 661 } 662 if (bit) 663 ic->ic_flags |= flag; 664 else 665 ic->ic_flags &= ~flag; 666} 667 668void 669ieee80211_syncflag(struct ieee80211vap *vap, int flag) 670{ 671 struct ieee80211com *ic = vap->iv_ic; 672 673 IEEE80211_LOCK(ic); 674 if (flag < 0) { 675 flag = -flag; 676 vap->iv_flags &= ~flag; 677 } else 678 vap->iv_flags |= flag; 679 ieee80211_syncflag_locked(ic, flag); 680 IEEE80211_UNLOCK(ic); 681} 682 683/* 684 * Synchronize flags_ht bit state in the com structure 685 * according to the state of all vap's. This is used, 686 * for example, to handle state changes via ioctls. 687 */ 688static void 689ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag) 690{ 691 struct ieee80211vap *vap; 692 int bit; 693 694 IEEE80211_LOCK_ASSERT(ic); 695 696 bit = 0; 697 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 698 if (vap->iv_flags_ht & flag) { 699 bit = 1; 700 break; 701 } 702 if (bit) 703 ic->ic_flags_ht |= flag; 704 else 705 ic->ic_flags_ht &= ~flag; 706} 707 708void 709ieee80211_syncflag_ht(struct ieee80211vap *vap, int flag) 710{ 711 struct ieee80211com *ic = vap->iv_ic; 712 713 IEEE80211_LOCK(ic); 714 if (flag < 0) { 715 flag = -flag; 716 vap->iv_flags_ht &= ~flag; 717 } else 718 vap->iv_flags_ht |= flag; 719 ieee80211_syncflag_ht_locked(ic, flag); 720 IEEE80211_UNLOCK(ic); 721} 722 723/* 724 * Synchronize flags_ext bit state in the com structure 725 * according to the state of all vap's. This is used, 726 * for example, to handle state changes via ioctls. 727 */ 728static void 729ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag) 730{ 731 struct ieee80211vap *vap; 732 int bit; 733 734 IEEE80211_LOCK_ASSERT(ic); 735 736 bit = 0; 737 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 738 if (vap->iv_flags_ext & flag) { 739 bit = 1; 740 break; 741 } 742 if (bit) 743 ic->ic_flags_ext |= flag; 744 else 745 ic->ic_flags_ext &= ~flag; 746} 747 748void 749ieee80211_syncflag_ext(struct ieee80211vap *vap, int flag) 750{ 751 struct ieee80211com *ic = vap->iv_ic; 752 753 IEEE80211_LOCK(ic); 754 if (flag < 0) { 755 flag = -flag; 756 vap->iv_flags_ext &= ~flag; 757 } else 758 vap->iv_flags_ext |= flag; 759 ieee80211_syncflag_ext_locked(ic, flag); 760 IEEE80211_UNLOCK(ic); 761} 762 763static __inline int 764mapgsm(u_int freq, u_int flags) 765{ 766 freq *= 10; 767 if (flags & IEEE80211_CHAN_QUARTER) 768 freq += 5; 769 else if (flags & IEEE80211_CHAN_HALF) 770 freq += 10; 771 else 772 freq += 20; 773 /* NB: there is no 907/20 wide but leave room */ 774 return (freq - 906*10) / 5; 775} 776 777static __inline int 778mappsb(u_int freq, u_int flags) 779{ 780 return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5; 781} 782 783/* 784 * Convert MHz frequency to IEEE channel number. 785 */ 786int 787ieee80211_mhz2ieee(u_int freq, u_int flags) 788{ 789#define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990) 790 if (flags & IEEE80211_CHAN_GSM) 791 return mapgsm(freq, flags); 792 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 793 if (freq == 2484) 794 return 14; 795 if (freq < 2484) 796 return ((int) freq - 2407) / 5; 797 else 798 return 15 + ((freq - 2512) / 20); 799 } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */ 800 if (freq <= 5000) { 801 /* XXX check regdomain? */ 802 if (IS_FREQ_IN_PSB(freq)) 803 return mappsb(freq, flags); 804 return (freq - 4000) / 5; 805 } else 806 return (freq - 5000) / 5; 807 } else { /* either, guess */ 808 if (freq == 2484) 809 return 14; 810 if (freq < 2484) { 811 if (907 <= freq && freq <= 922) 812 return mapgsm(freq, flags); 813 return ((int) freq - 2407) / 5; 814 } 815 if (freq < 5000) { 816 if (IS_FREQ_IN_PSB(freq)) 817 return mappsb(freq, flags); 818 else if (freq > 4900) 819 return (freq - 4000) / 5; 820 else 821 return 15 + ((freq - 2512) / 20); 822 } 823 return (freq - 5000) / 5; 824 } 825#undef IS_FREQ_IN_PSB 826} 827 828/* 829 * Convert channel to IEEE channel number. 830 */ 831int 832ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c) 833{ 834 if (c == NULL) { 835 if_printf(ic->ic_ifp, "invalid channel (NULL)\n"); 836 return 0; /* XXX */ 837 } 838 return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee); 839} 840 841/* 842 * Convert IEEE channel number to MHz frequency. 843 */ 844u_int 845ieee80211_ieee2mhz(u_int chan, u_int flags) 846{ 847 if (flags & IEEE80211_CHAN_GSM) 848 return 907 + 5 * (chan / 10); 849 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 850 if (chan == 14) 851 return 2484; 852 if (chan < 14) 853 return 2407 + chan*5; 854 else 855 return 2512 + ((chan-15)*20); 856 } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */ 857 if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) { 858 chan -= 37; 859 return 4940 + chan*5 + (chan % 5 ? 2 : 0); 860 } 861 return 5000 + (chan*5); 862 } else { /* either, guess */ 863 /* XXX can't distinguish PSB+GSM channels */ 864 if (chan == 14) 865 return 2484; 866 if (chan < 14) /* 0-13 */ 867 return 2407 + chan*5; 868 if (chan < 27) /* 15-26 */ 869 return 2512 + ((chan-15)*20); 870 return 5000 + (chan*5); 871 } 872} 873 874/* 875 * Locate a channel given a frequency+flags. We cache 876 * the previous lookup to optimize switching between two 877 * channels--as happens with dynamic turbo. 878 */ 879struct ieee80211_channel * 880ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags) 881{ 882 struct ieee80211_channel *c; 883 int i; 884 885 flags &= IEEE80211_CHAN_ALLTURBO; 886 c = ic->ic_prevchan; 887 if (c != NULL && c->ic_freq == freq && 888 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 889 return c; 890 /* brute force search */ 891 for (i = 0; i < ic->ic_nchans; i++) { 892 c = &ic->ic_channels[i]; 893 if (c->ic_freq == freq && 894 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 895 return c; 896 } 897 return NULL; 898} 899 900/* 901 * Locate a channel given a channel number+flags. We cache 902 * the previous lookup to optimize switching between two 903 * channels--as happens with dynamic turbo. 904 */ 905struct ieee80211_channel * 906ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags) 907{ 908 struct ieee80211_channel *c; 909 int i; 910 911 flags &= IEEE80211_CHAN_ALLTURBO; 912 c = ic->ic_prevchan; 913 if (c != NULL && c->ic_ieee == ieee && 914 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 915 return c; 916 /* brute force search */ 917 for (i = 0; i < ic->ic_nchans; i++) { 918 c = &ic->ic_channels[i]; 919 if (c->ic_ieee == ieee && 920 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 921 return c; 922 } 923 return NULL; 924} 925 926static void 927addmedia(struct ifmedia *media, int caps, int addsta, int mode, int mword) 928{ 929#define ADD(_ic, _s, _o) \ 930 ifmedia_add(media, \ 931 IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL) 932 static const u_int mopts[IEEE80211_MODE_MAX] = { 933 [IEEE80211_MODE_AUTO] = IFM_AUTO, 934 [IEEE80211_MODE_11A] = IFM_IEEE80211_11A, 935 [IEEE80211_MODE_11B] = IFM_IEEE80211_11B, 936 [IEEE80211_MODE_11G] = IFM_IEEE80211_11G, 937 [IEEE80211_MODE_FH] = IFM_IEEE80211_FH, 938 [IEEE80211_MODE_TURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO, 939 [IEEE80211_MODE_TURBO_G] = IFM_IEEE80211_11G|IFM_IEEE80211_TURBO, 940 [IEEE80211_MODE_STURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO, 941 [IEEE80211_MODE_HALF] = IFM_IEEE80211_11A, /* XXX */ 942 [IEEE80211_MODE_QUARTER] = IFM_IEEE80211_11A, /* XXX */ 943 [IEEE80211_MODE_11NA] = IFM_IEEE80211_11NA, 944 [IEEE80211_MODE_11NG] = IFM_IEEE80211_11NG, 945 }; 946 u_int mopt; 947 948 mopt = mopts[mode]; 949 if (addsta) 950 ADD(ic, mword, mopt); /* STA mode has no cap */ 951 if (caps & IEEE80211_C_IBSS) 952 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC); 953 if (caps & IEEE80211_C_HOSTAP) 954 ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP); 955 if (caps & IEEE80211_C_AHDEMO) 956 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0); 957 if (caps & IEEE80211_C_MONITOR) 958 ADD(media, mword, mopt | IFM_IEEE80211_MONITOR); 959 if (caps & IEEE80211_C_WDS) 960 ADD(media, mword, mopt | IFM_IEEE80211_WDS); 961#undef ADD 962} 963 964/* 965 * Setup the media data structures according to the channel and 966 * rate tables. 967 */ 968static int 969ieee80211_media_setup(struct ieee80211com *ic, 970 struct ifmedia *media, int caps, int addsta, 971 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) 972{ 973 int i, j, mode, rate, maxrate, mword, r; 974 const struct ieee80211_rateset *rs; 975 struct ieee80211_rateset allrates; 976 977 /* 978 * Fill in media characteristics. 979 */ 980 ifmedia_init(media, 0, media_change, media_stat); 981 maxrate = 0; 982 /* 983 * Add media for legacy operating modes. 984 */ 985 memset(&allrates, 0, sizeof(allrates)); 986 for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) { 987 if (isclr(ic->ic_modecaps, mode)) 988 continue; 989 addmedia(media, caps, addsta, mode, IFM_AUTO); 990 if (mode == IEEE80211_MODE_AUTO) 991 continue; 992 rs = &ic->ic_sup_rates[mode]; 993 for (i = 0; i < rs->rs_nrates; i++) { 994 rate = rs->rs_rates[i]; 995 mword = ieee80211_rate2media(ic, rate, mode); 996 if (mword == 0) 997 continue; 998 addmedia(media, caps, addsta, mode, mword); 999 /* 1000 * Add legacy rate to the collection of all rates. 1001 */ 1002 r = rate & IEEE80211_RATE_VAL; 1003 for (j = 0; j < allrates.rs_nrates; j++) 1004 if (allrates.rs_rates[j] == r) 1005 break; 1006 if (j == allrates.rs_nrates) { 1007 /* unique, add to the set */ 1008 allrates.rs_rates[j] = r; 1009 allrates.rs_nrates++; 1010 } 1011 rate = (rate & IEEE80211_RATE_VAL) / 2; 1012 if (rate > maxrate) 1013 maxrate = rate; 1014 } 1015 } 1016 for (i = 0; i < allrates.rs_nrates; i++) { 1017 mword = ieee80211_rate2media(ic, allrates.rs_rates[i], 1018 IEEE80211_MODE_AUTO); 1019 if (mword == 0) 1020 continue; 1021 /* NB: remove media options from mword */ 1022 addmedia(media, caps, addsta, 1023 IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword)); 1024 } 1025 /* 1026 * Add HT/11n media. Note that we do not have enough 1027 * bits in the media subtype to express the MCS so we 1028 * use a "placeholder" media subtype and any fixed MCS 1029 * must be specified with a different mechanism. 1030 */ 1031 for (; mode <= IEEE80211_MODE_11NG; mode++) { 1032 if (isclr(ic->ic_modecaps, mode)) 1033 continue; 1034 addmedia(media, caps, addsta, mode, IFM_AUTO); 1035 addmedia(media, caps, addsta, mode, IFM_IEEE80211_MCS); 1036 } 1037 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) || 1038 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) { 1039 addmedia(media, caps, addsta, 1040 IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS); 1041 /* XXX could walk htrates */ 1042 /* XXX known array size */ 1043 if (ieee80211_htrates[15].ht40_rate_400ns > maxrate) 1044 maxrate = ieee80211_htrates[15].ht40_rate_400ns; 1045 } 1046 return maxrate; 1047} 1048 1049void 1050ieee80211_media_init(struct ieee80211com *ic) 1051{ 1052 struct ifnet *ifp = ic->ic_ifp; 1053 int maxrate; 1054 1055 /* NB: this works because the structure is initialized to zero */ 1056 if (!LIST_EMPTY(&ic->ic_media.ifm_list)) { 1057 /* 1058 * We are re-initializing the channel list; clear 1059 * the existing media state as the media routines 1060 * don't suppress duplicates. 1061 */ 1062 ifmedia_removeall(&ic->ic_media); 1063 } 1064 ieee80211_chan_init(ic); 1065 1066 /* 1067 * Recalculate media settings in case new channel list changes 1068 * the set of available modes. 1069 */ 1070 maxrate = ieee80211_media_setup(ic, &ic->ic_media, ic->ic_caps, 1, 1071 ieee80211com_media_change, ieee80211com_media_status); 1072 /* NB: strip explicit mode; we're actually in autoselect */ 1073 ifmedia_set(&ic->ic_media, 1074 media_status(ic->ic_opmode, ic->ic_curchan) &~ 1075 (IFM_MMASK | IFM_IEEE80211_TURBO)); 1076 if (maxrate) 1077 ifp->if_baudrate = IF_Mbps(maxrate); 1078 1079 /* XXX need to propagate new media settings to vap's */ 1080} 1081 1082/* XXX inline or eliminate? */ 1083const struct ieee80211_rateset * 1084ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c) 1085{ 1086 /* XXX does this work for 11ng basic rates? */ 1087 return &ic->ic_sup_rates[ieee80211_chan2mode(c)]; 1088} 1089 1090void 1091ieee80211_announce(struct ieee80211com *ic) 1092{ 1093 struct ifnet *ifp = ic->ic_ifp; 1094 int i, mode, rate, mword; 1095 const struct ieee80211_rateset *rs; 1096 1097 /* NB: skip AUTO since it has no rates */ 1098 for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) { 1099 if (isclr(ic->ic_modecaps, mode)) 1100 continue; 1101 if_printf(ifp, "%s rates: ", ieee80211_phymode_name[mode]); 1102 rs = &ic->ic_sup_rates[mode]; 1103 for (i = 0; i < rs->rs_nrates; i++) { 1104 mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode); 1105 if (mword == 0) 1106 continue; 1107 rate = ieee80211_media2rate(mword); 1108 printf("%s%d%sMbps", (i != 0 ? " " : ""), 1109 rate / 2, ((rate & 0x1) != 0 ? ".5" : "")); 1110 } 1111 printf("\n"); 1112 } 1113 ieee80211_ht_announce(ic); 1114} 1115 1116void 1117ieee80211_announce_channels(struct ieee80211com *ic) 1118{ 1119 const struct ieee80211_channel *c; 1120 char type; 1121 int i, cw; 1122 1123 printf("Chan Freq CW RegPwr MinPwr MaxPwr\n"); 1124 for (i = 0; i < ic->ic_nchans; i++) { 1125 c = &ic->ic_channels[i]; 1126 if (IEEE80211_IS_CHAN_ST(c)) 1127 type = 'S'; 1128 else if (IEEE80211_IS_CHAN_108A(c)) 1129 type = 'T'; 1130 else if (IEEE80211_IS_CHAN_108G(c)) 1131 type = 'G'; 1132 else if (IEEE80211_IS_CHAN_HT(c)) 1133 type = 'n'; 1134 else if (IEEE80211_IS_CHAN_A(c)) 1135 type = 'a'; 1136 else if (IEEE80211_IS_CHAN_ANYG(c)) 1137 type = 'g'; 1138 else if (IEEE80211_IS_CHAN_B(c)) 1139 type = 'b'; 1140 else 1141 type = 'f'; 1142 if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c)) 1143 cw = 40; 1144 else if (IEEE80211_IS_CHAN_HALF(c)) 1145 cw = 10; 1146 else if (IEEE80211_IS_CHAN_QUARTER(c)) 1147 cw = 5; 1148 else 1149 cw = 20; 1150 printf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n" 1151 , c->ic_ieee, c->ic_freq, type 1152 , cw 1153 , IEEE80211_IS_CHAN_HT40U(c) ? '+' : 1154 IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' ' 1155 , c->ic_maxregpower 1156 , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0 1157 , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0 1158 ); 1159 } 1160} 1161 1162static int 1163media2mode(const struct ifmedia_entry *ime, uint32_t flags, uint16_t *mode) 1164{ 1165 switch (IFM_MODE(ime->ifm_media)) { 1166 case IFM_IEEE80211_11A: 1167 *mode = IEEE80211_MODE_11A; 1168 break; 1169 case IFM_IEEE80211_11B: 1170 *mode = IEEE80211_MODE_11B; 1171 break; 1172 case IFM_IEEE80211_11G: 1173 *mode = IEEE80211_MODE_11G; 1174 break; 1175 case IFM_IEEE80211_FH: 1176 *mode = IEEE80211_MODE_FH; 1177 break; 1178 case IFM_IEEE80211_11NA: 1179 *mode = IEEE80211_MODE_11NA; 1180 break; 1181 case IFM_IEEE80211_11NG: 1182 *mode = IEEE80211_MODE_11NG; 1183 break; 1184 case IFM_AUTO: 1185 *mode = IEEE80211_MODE_AUTO; 1186 break; 1187 default: 1188 return 0; 1189 } 1190 /* 1191 * Turbo mode is an ``option''. 1192 * XXX does not apply to AUTO 1193 */ 1194 if (ime->ifm_media & IFM_IEEE80211_TURBO) { 1195 if (*mode == IEEE80211_MODE_11A) { 1196 if (flags & IEEE80211_F_TURBOP) 1197 *mode = IEEE80211_MODE_TURBO_A; 1198 else 1199 *mode = IEEE80211_MODE_STURBO_A; 1200 } else if (*mode == IEEE80211_MODE_11G) 1201 *mode = IEEE80211_MODE_TURBO_G; 1202 else 1203 return 0; 1204 } 1205 /* XXX HT40 +/- */ 1206 return 1; 1207} 1208 1209/* 1210 * Handle a media change request on the underlying interface. 1211 */ 1212int 1213ieee80211com_media_change(struct ifnet *ifp) 1214{ 1215 return EINVAL; 1216} 1217 1218/* 1219 * Handle a media change request on the vap interface. 1220 */ 1221int 1222ieee80211_media_change(struct ifnet *ifp) 1223{ 1224 struct ieee80211vap *vap = ifp->if_softc; 1225 struct ifmedia_entry *ime = vap->iv_media.ifm_cur; 1226 uint16_t newmode; 1227 1228 if (!media2mode(ime, vap->iv_flags, &newmode)) 1229 return EINVAL; 1230 if (vap->iv_des_mode != newmode) { 1231 vap->iv_des_mode = newmode; 1232 /* XXX kick state machine if up+running */ 1233 } 1234 return 0; 1235} 1236 1237/* 1238 * Common code to calculate the media status word 1239 * from the operating mode and channel state. 1240 */ 1241static int 1242media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan) 1243{ 1244 int status; 1245 1246 status = IFM_IEEE80211; 1247 switch (opmode) { 1248 case IEEE80211_M_STA: 1249 break; 1250 case IEEE80211_M_IBSS: 1251 status |= IFM_IEEE80211_ADHOC; 1252 break; 1253 case IEEE80211_M_HOSTAP: 1254 status |= IFM_IEEE80211_HOSTAP; 1255 break; 1256 case IEEE80211_M_MONITOR: 1257 status |= IFM_IEEE80211_MONITOR; 1258 break; 1259 case IEEE80211_M_AHDEMO: 1260 status |= IFM_IEEE80211_ADHOC | IFM_FLAG0; 1261 break; 1262 case IEEE80211_M_WDS: 1263 status |= IFM_IEEE80211_WDS; 1264 break; 1265 } 1266 if (IEEE80211_IS_CHAN_HTA(chan)) { 1267 status |= IFM_IEEE80211_11NA; 1268 } else if (IEEE80211_IS_CHAN_HTG(chan)) { 1269 status |= IFM_IEEE80211_11NG; 1270 } else if (IEEE80211_IS_CHAN_A(chan)) { 1271 status |= IFM_IEEE80211_11A; 1272 } else if (IEEE80211_IS_CHAN_B(chan)) { 1273 status |= IFM_IEEE80211_11B; 1274 } else if (IEEE80211_IS_CHAN_ANYG(chan)) { 1275 status |= IFM_IEEE80211_11G; 1276 } else if (IEEE80211_IS_CHAN_FHSS(chan)) { 1277 status |= IFM_IEEE80211_FH; 1278 } 1279 /* XXX else complain? */ 1280 1281 if (IEEE80211_IS_CHAN_TURBO(chan)) 1282 status |= IFM_IEEE80211_TURBO; 1283#if 0 1284 if (IEEE80211_IS_CHAN_HT20(chan)) 1285 status |= IFM_IEEE80211_HT20; 1286 if (IEEE80211_IS_CHAN_HT40(chan)) 1287 status |= IFM_IEEE80211_HT40; 1288#endif 1289 return status; 1290} 1291 1292static void 1293ieee80211com_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1294{ 1295 struct ieee80211com *ic = ifp->if_l2com; 1296 struct ieee80211vap *vap; 1297 1298 imr->ifm_status = IFM_AVALID; 1299 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1300 if (vap->iv_ifp->if_flags & IFF_UP) { 1301 imr->ifm_status |= IFM_ACTIVE; 1302 break; 1303 } 1304 imr->ifm_active = media_status(ic->ic_opmode, ic->ic_curchan); 1305 if (imr->ifm_status & IFM_ACTIVE) 1306 imr->ifm_current = imr->ifm_active; 1307} 1308 1309void 1310ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1311{ 1312 struct ieee80211vap *vap = ifp->if_softc; 1313 struct ieee80211com *ic = vap->iv_ic; 1314 enum ieee80211_phymode mode; 1315 1316 imr->ifm_status = IFM_AVALID; 1317 /* 1318 * NB: use the current channel's mode to lock down a xmit 1319 * rate only when running; otherwise we may have a mismatch 1320 * in which case the rate will not be convertible. 1321 */ 1322 if (vap->iv_state == IEEE80211_S_RUN) { 1323 imr->ifm_status |= IFM_ACTIVE; 1324 mode = ieee80211_chan2mode(ic->ic_curchan); 1325 } else 1326 mode = IEEE80211_MODE_AUTO; 1327 imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan); 1328 /* 1329 * Calculate a current rate if possible. 1330 */ 1331 if (vap->iv_txparms[mode].ucastrate != IEEE80211_FIXED_RATE_NONE) { 1332 /* 1333 * A fixed rate is set, report that. 1334 */ 1335 imr->ifm_active |= ieee80211_rate2media(ic, 1336 vap->iv_txparms[mode].ucastrate, mode); 1337 } else if (vap->iv_opmode == IEEE80211_M_STA) { 1338 /* 1339 * In station mode report the current transmit rate. 1340 */ 1341 imr->ifm_active |= ieee80211_rate2media(ic, 1342 vap->iv_bss->ni_txrate, mode); 1343 } else 1344 imr->ifm_active |= IFM_AUTO; 1345 if (imr->ifm_status & IFM_ACTIVE) 1346 imr->ifm_current = imr->ifm_active; 1347} 1348 1349/* 1350 * Set the current phy mode and recalculate the active channel 1351 * set based on the available channels for this mode. Also 1352 * select a new default/current channel if the current one is 1353 * inappropriate for this mode. 1354 */ 1355int 1356ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode) 1357{ 1358 /* 1359 * Adjust basic rates in 11b/11g supported rate set. 1360 * Note that if operating on a hal/quarter rate channel 1361 * this is a noop as those rates sets are different 1362 * and used instead. 1363 */ 1364 if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B) 1365 ieee80211_setbasicrates(&ic->ic_sup_rates[mode], mode); 1366 1367 ic->ic_curmode = mode; 1368 ieee80211_reset_erp(ic); /* reset ERP state */ 1369 1370 return 0; 1371} 1372 1373/* 1374 * Return the phy mode for with the specified channel. 1375 */ 1376enum ieee80211_phymode 1377ieee80211_chan2mode(const struct ieee80211_channel *chan) 1378{ 1379 1380 if (IEEE80211_IS_CHAN_HTA(chan)) 1381 return IEEE80211_MODE_11NA; 1382 else if (IEEE80211_IS_CHAN_HTG(chan)) 1383 return IEEE80211_MODE_11NG; 1384 else if (IEEE80211_IS_CHAN_108G(chan)) 1385 return IEEE80211_MODE_TURBO_G; 1386 else if (IEEE80211_IS_CHAN_ST(chan)) 1387 return IEEE80211_MODE_STURBO_A; 1388 else if (IEEE80211_IS_CHAN_TURBO(chan)) 1389 return IEEE80211_MODE_TURBO_A; 1390 else if (IEEE80211_IS_CHAN_HALF(chan)) 1391 return IEEE80211_MODE_HALF; 1392 else if (IEEE80211_IS_CHAN_QUARTER(chan)) 1393 return IEEE80211_MODE_QUARTER; 1394 else if (IEEE80211_IS_CHAN_A(chan)) 1395 return IEEE80211_MODE_11A; 1396 else if (IEEE80211_IS_CHAN_ANYG(chan)) 1397 return IEEE80211_MODE_11G; 1398 else if (IEEE80211_IS_CHAN_B(chan)) 1399 return IEEE80211_MODE_11B; 1400 else if (IEEE80211_IS_CHAN_FHSS(chan)) 1401 return IEEE80211_MODE_FH; 1402 1403 /* NB: should not get here */ 1404 printf("%s: cannot map channel to mode; freq %u flags 0x%x\n", 1405 __func__, chan->ic_freq, chan->ic_flags); 1406 return IEEE80211_MODE_11B; 1407} 1408 1409struct ratemedia { 1410 u_int match; /* rate + mode */ 1411 u_int media; /* if_media rate */ 1412}; 1413 1414static int 1415findmedia(const struct ratemedia rates[], int n, u_int match) 1416{ 1417 int i; 1418 1419 for (i = 0; i < n; i++) 1420 if (rates[i].match == match) 1421 return rates[i].media; 1422 return IFM_AUTO; 1423} 1424 1425/* 1426 * Convert IEEE80211 rate value to ifmedia subtype. 1427 * Rate is either a legacy rate in units of 0.5Mbps 1428 * or an MCS index. 1429 */ 1430int 1431ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode) 1432{ 1433#define N(a) (sizeof(a) / sizeof(a[0])) 1434 static const struct ratemedia rates[] = { 1435 { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 }, 1436 { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 }, 1437 { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 }, 1438 { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 }, 1439 { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 }, 1440 { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 }, 1441 { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 }, 1442 { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 }, 1443 { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 }, 1444 { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 }, 1445 { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 }, 1446 { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 }, 1447 { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 }, 1448 { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 }, 1449 { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 }, 1450 { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 }, 1451 { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 }, 1452 { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 }, 1453 { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 }, 1454 { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 }, 1455 { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 }, 1456 { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 }, 1457 { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 }, 1458 { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 }, 1459 { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 }, 1460 { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 }, 1461 { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 }, 1462 { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 }, 1463 { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 }, 1464 { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 }, 1465 /* NB: OFDM72 doesn't realy exist so we don't handle it */ 1466 }; 1467 static const struct ratemedia htrates[] = { 1468 { 0, IFM_IEEE80211_MCS }, 1469 { 1, IFM_IEEE80211_MCS }, 1470 { 2, IFM_IEEE80211_MCS }, 1471 { 3, IFM_IEEE80211_MCS }, 1472 { 4, IFM_IEEE80211_MCS }, 1473 { 5, IFM_IEEE80211_MCS }, 1474 { 6, IFM_IEEE80211_MCS }, 1475 { 7, IFM_IEEE80211_MCS }, 1476 { 8, IFM_IEEE80211_MCS }, 1477 { 9, IFM_IEEE80211_MCS }, 1478 { 10, IFM_IEEE80211_MCS }, 1479 { 11, IFM_IEEE80211_MCS }, 1480 { 12, IFM_IEEE80211_MCS }, 1481 { 13, IFM_IEEE80211_MCS }, 1482 { 14, IFM_IEEE80211_MCS }, 1483 { 15, IFM_IEEE80211_MCS }, 1484 }; 1485 int m; 1486 1487 /* 1488 * Check 11n rates first for match as an MCS. 1489 */ 1490 if (mode == IEEE80211_MODE_11NA) { 1491 if (rate & IEEE80211_RATE_MCS) { 1492 rate &= ~IEEE80211_RATE_MCS; 1493 m = findmedia(htrates, N(htrates), rate); 1494 if (m != IFM_AUTO) 1495 return m | IFM_IEEE80211_11NA; 1496 } 1497 } else if (mode == IEEE80211_MODE_11NG) { 1498 /* NB: 12 is ambiguous, it will be treated as an MCS */ 1499 if (rate & IEEE80211_RATE_MCS) { 1500 rate &= ~IEEE80211_RATE_MCS; 1501 m = findmedia(htrates, N(htrates), rate); 1502 if (m != IFM_AUTO) 1503 return m | IFM_IEEE80211_11NG; 1504 } 1505 } 1506 rate &= IEEE80211_RATE_VAL; 1507 switch (mode) { 1508 case IEEE80211_MODE_11A: 1509 case IEEE80211_MODE_HALF: /* XXX good 'nuf */ 1510 case IEEE80211_MODE_QUARTER: 1511 case IEEE80211_MODE_11NA: 1512 case IEEE80211_MODE_TURBO_A: 1513 case IEEE80211_MODE_STURBO_A: 1514 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11A); 1515 case IEEE80211_MODE_11B: 1516 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11B); 1517 case IEEE80211_MODE_FH: 1518 return findmedia(rates, N(rates), rate | IFM_IEEE80211_FH); 1519 case IEEE80211_MODE_AUTO: 1520 /* NB: ic may be NULL for some drivers */ 1521 if (ic != NULL && ic->ic_phytype == IEEE80211_T_FH) 1522 return findmedia(rates, N(rates), 1523 rate | IFM_IEEE80211_FH); 1524 /* NB: hack, 11g matches both 11b+11a rates */ 1525 /* fall thru... */ 1526 case IEEE80211_MODE_11G: 1527 case IEEE80211_MODE_11NG: 1528 case IEEE80211_MODE_TURBO_G: 1529 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11G); 1530 } 1531 return IFM_AUTO; 1532#undef N 1533} 1534 1535int 1536ieee80211_media2rate(int mword) 1537{ 1538#define N(a) (sizeof(a) / sizeof(a[0])) 1539 static const int ieeerates[] = { 1540 -1, /* IFM_AUTO */ 1541 0, /* IFM_MANUAL */ 1542 0, /* IFM_NONE */ 1543 2, /* IFM_IEEE80211_FH1 */ 1544 4, /* IFM_IEEE80211_FH2 */ 1545 2, /* IFM_IEEE80211_DS1 */ 1546 4, /* IFM_IEEE80211_DS2 */ 1547 11, /* IFM_IEEE80211_DS5 */ 1548 22, /* IFM_IEEE80211_DS11 */ 1549 44, /* IFM_IEEE80211_DS22 */ 1550 12, /* IFM_IEEE80211_OFDM6 */ 1551 18, /* IFM_IEEE80211_OFDM9 */ 1552 24, /* IFM_IEEE80211_OFDM12 */ 1553 36, /* IFM_IEEE80211_OFDM18 */ 1554 48, /* IFM_IEEE80211_OFDM24 */ 1555 72, /* IFM_IEEE80211_OFDM36 */ 1556 96, /* IFM_IEEE80211_OFDM48 */ 1557 108, /* IFM_IEEE80211_OFDM54 */ 1558 144, /* IFM_IEEE80211_OFDM72 */ 1559 0, /* IFM_IEEE80211_DS354k */ 1560 0, /* IFM_IEEE80211_DS512k */ 1561 6, /* IFM_IEEE80211_OFDM3 */ 1562 9, /* IFM_IEEE80211_OFDM4 */ 1563 54, /* IFM_IEEE80211_OFDM27 */ 1564 -1, /* IFM_IEEE80211_MCS */ 1565 }; 1566 return IFM_SUBTYPE(mword) < N(ieeerates) ? 1567 ieeerates[IFM_SUBTYPE(mword)] : 0; 1568#undef N 1569} 1570