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("$FreeBSD$"); 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 55 const 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 */ 70 const 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 79 static const uint8_t ieee80211broadcastaddr[IEEE80211_ADDR_LEN] = 80 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 81 82 static void ieee80211_syncflag_locked(struct ieee80211com *ic, int flag); 83 static void ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag); 84 static int ieee80211_media_setup(struct ieee80211com *ic, 85 struct ifmedia *media, int caps, int addsta, 86 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat); 87 static void ieee80211com_media_status(struct ifnet *, struct ifmediareq *); 88 static int ieee80211com_media_change(struct ifnet *); 89 static int media_status(enum ieee80211_opmode, 90 const struct ieee80211_channel *); 91 92 MALLOC_DEFINE(M_80211_VAP, "80211vap", "802.11 vap state"); 93 94 /* 95 * Default supported rates for 802.11 operation (in IEEE .5Mb units). 96 */ 97 #define B(r) ((r) | IEEE80211_RATE_BASIC) 98 static const struct ieee80211_rateset ieee80211_rateset_11a = 99 { 8, { B(12), 18, B(24), 36, B(48), 72, 96, 108 } }; 100 static const struct ieee80211_rateset ieee80211_rateset_half = 101 { 8, { B(6), 9, B(12), 18, B(24), 36, 48, 54 } }; 102 static const struct ieee80211_rateset ieee80211_rateset_quarter = 103 { 8, { B(3), 4, B(6), 9, B(12), 18, 24, 27 } }; 104 static const struct ieee80211_rateset ieee80211_rateset_11b = 105 { 4, { B(2), B(4), B(11), B(22) } }; 106 /* NB: OFDM rates are handled specially based on mode */ 107 static const struct ieee80211_rateset ieee80211_rateset_11g = 108 { 12, { B(2), B(4), B(11), B(22), 12, 18, 24, 36, 48, 72, 96, 108 } }; 109 #undef B 110 111 /* 112 * Fill in 802.11 available channel set, mark 113 * all available channels as active, and pick 114 * a default channel if not already specified. 115 */ 116 static void 117 ieee80211_chan_init(struct ieee80211com *ic) 118 { 119 #define DEFAULTRATES(m, def) do { \ 120 if (ic->ic_sup_rates[m].rs_nrates == 0) \ 121 ic->ic_sup_rates[m] = def; \ 122 } while (0) 123 struct ieee80211_channel *c; 124 int i; 125 126 KASSERT(0 < ic->ic_nchans && ic->ic_nchans <= IEEE80211_CHAN_MAX, 127 ("invalid number of channels specified: %u", ic->ic_nchans)); 128 memset(ic->ic_chan_avail, 0, sizeof(ic->ic_chan_avail)); 129 memset(ic->ic_modecaps, 0, sizeof(ic->ic_modecaps)); 130 setbit(ic->ic_modecaps, IEEE80211_MODE_AUTO); 131 for (i = 0; i < ic->ic_nchans; i++) { 132 c = &ic->ic_channels[i]; 133 KASSERT(c->ic_flags != 0, ("channel with no flags")); 134 /* 135 * Help drivers that work only with frequencies by filling 136 * in IEEE channel #'s if not already calculated. Note this 137 * mimics similar work done in ieee80211_setregdomain when 138 * changing regulatory state. 139 */ 140 if (c->ic_ieee == 0) 141 c->ic_ieee = ieee80211_mhz2ieee(c->ic_freq,c->ic_flags); 142 if (IEEE80211_IS_CHAN_HT40(c) && c->ic_extieee == 0) 143 c->ic_extieee = ieee80211_mhz2ieee(c->ic_freq + 144 (IEEE80211_IS_CHAN_HT40U(c) ? 20 : -20), 145 c->ic_flags); 146 /* default max tx power to max regulatory */ 147 if (c->ic_maxpower == 0) 148 c->ic_maxpower = 2*c->ic_maxregpower; 149 setbit(ic->ic_chan_avail, c->ic_ieee); 150 /* 151 * Identify mode capabilities. 152 */ 153 if (IEEE80211_IS_CHAN_A(c)) 154 setbit(ic->ic_modecaps, IEEE80211_MODE_11A); 155 if (IEEE80211_IS_CHAN_B(c)) 156 setbit(ic->ic_modecaps, IEEE80211_MODE_11B); 157 if (IEEE80211_IS_CHAN_ANYG(c)) 158 setbit(ic->ic_modecaps, IEEE80211_MODE_11G); 159 if (IEEE80211_IS_CHAN_FHSS(c)) 160 setbit(ic->ic_modecaps, IEEE80211_MODE_FH); 161 if (IEEE80211_IS_CHAN_108A(c)) 162 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_A); 163 if (IEEE80211_IS_CHAN_108G(c)) 164 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_G); 165 if (IEEE80211_IS_CHAN_ST(c)) 166 setbit(ic->ic_modecaps, IEEE80211_MODE_STURBO_A); 167 if (IEEE80211_IS_CHAN_HALF(c)) 168 setbit(ic->ic_modecaps, IEEE80211_MODE_HALF); 169 if (IEEE80211_IS_CHAN_QUARTER(c)) 170 setbit(ic->ic_modecaps, IEEE80211_MODE_QUARTER); 171 if (IEEE80211_IS_CHAN_HTA(c)) 172 setbit(ic->ic_modecaps, IEEE80211_MODE_11NA); 173 if (IEEE80211_IS_CHAN_HTG(c)) 174 setbit(ic->ic_modecaps, IEEE80211_MODE_11NG); 175 } 176 /* initialize candidate channels to all available */ 177 memcpy(ic->ic_chan_active, ic->ic_chan_avail, 178 sizeof(ic->ic_chan_avail)); 179 180 /* sort channel table to allow lookup optimizations */ 181 ieee80211_sort_channels(ic->ic_channels, ic->ic_nchans); 182 183 /* invalidate any previous state */ 184 ic->ic_bsschan = IEEE80211_CHAN_ANYC; 185 ic->ic_prevchan = NULL; 186 ic->ic_csa_newchan = NULL; 187 /* arbitrarily pick the first channel */ 188 ic->ic_curchan = &ic->ic_channels[0]; 189 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 190 191 /* fillin well-known rate sets if driver has not specified */ 192 DEFAULTRATES(IEEE80211_MODE_11B, ieee80211_rateset_11b); 193 DEFAULTRATES(IEEE80211_MODE_11G, ieee80211_rateset_11g); 194 DEFAULTRATES(IEEE80211_MODE_11A, ieee80211_rateset_11a); 195 DEFAULTRATES(IEEE80211_MODE_TURBO_A, ieee80211_rateset_11a); 196 DEFAULTRATES(IEEE80211_MODE_TURBO_G, ieee80211_rateset_11g); 197 DEFAULTRATES(IEEE80211_MODE_STURBO_A, ieee80211_rateset_11a); 198 DEFAULTRATES(IEEE80211_MODE_HALF, ieee80211_rateset_half); 199 DEFAULTRATES(IEEE80211_MODE_QUARTER, ieee80211_rateset_quarter); 200 DEFAULTRATES(IEEE80211_MODE_11NA, ieee80211_rateset_11a); 201 DEFAULTRATES(IEEE80211_MODE_11NG, ieee80211_rateset_11g); 202 203 /* 204 * Set auto mode to reset active channel state and any desired channel. 205 */ 206 (void) ieee80211_setmode(ic, IEEE80211_MODE_AUTO); 207 #undef DEFAULTRATES 208 } 209 210 static void 211 null_update_mcast(struct ifnet *ifp) 212 { 213 if_printf(ifp, "need multicast update callback\n"); 214 } 215 216 static void 217 null_update_promisc(struct ifnet *ifp) 218 { 219 if_printf(ifp, "need promiscuous mode update callback\n"); 220 } 221 222 static int 223 null_output(struct ifnet *ifp, struct mbuf *m, 224 struct sockaddr *dst, struct route *ro) 225 { 226 if_printf(ifp, "discard raw packet\n"); 227 m_freem(m); 228 return EIO; 229 } 230 231 static void 232 null_input(struct ifnet *ifp, struct mbuf *m) 233 { 234 if_printf(ifp, "if_input should not be called\n"); 235 m_freem(m); 236 } 237 238 /* 239 * Attach/setup the common net80211 state. Called by 240 * the driver on attach to prior to creating any vap's. 241 */ 242 void 243 ieee80211_ifattach(struct ieee80211com *ic, 244 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 245 { 246 struct ifnet *ifp = ic->ic_ifp; 247 struct sockaddr_dl *sdl; 248 struct ifaddr *ifa; 249 250 KASSERT(ifp->if_type == IFT_IEEE80211, ("if_type %d", ifp->if_type)); 251 252 IEEE80211_LOCK_INIT(ic, ifp->if_xname); 253 TAILQ_INIT(&ic->ic_vaps); 254 255 /* Create a taskqueue for all state changes */ 256 ic->ic_tq = taskqueue_create("ic_taskq", M_WAITOK | M_ZERO, 257 taskqueue_thread_enqueue, &ic->ic_tq); 258 taskqueue_start_threads(&ic->ic_tq, 1, PI_NET, "%s taskq", 259 ifp->if_xname); 260 /* 261 * Fill in 802.11 available channel set, mark all 262 * available channels as active, and pick a default 263 * channel if not already specified. 264 */ 265 ieee80211_media_init(ic); 266 267 ic->ic_update_mcast = null_update_mcast; 268 ic->ic_update_promisc = null_update_promisc; 269 270 ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT; 271 ic->ic_lintval = ic->ic_bintval; 272 ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX; 273 274 ieee80211_crypto_attach(ic); 275 ieee80211_node_attach(ic); 276 ieee80211_power_attach(ic); 277 ieee80211_proto_attach(ic); 278 #ifdef IEEE80211_SUPPORT_SUPERG 279 ieee80211_superg_attach(ic); 280 #endif 281 ieee80211_ht_attach(ic); 282 ieee80211_scan_attach(ic); 283 ieee80211_regdomain_attach(ic); 284 285 ieee80211_sysctl_attach(ic); 286 287 ifp->if_addrlen = IEEE80211_ADDR_LEN; 288 ifp->if_hdrlen = 0; 289 if_attach(ifp); 290 ifp->if_mtu = IEEE80211_MTU_MAX; 291 ifp->if_broadcastaddr = ieee80211broadcastaddr; 292 ifp->if_output = null_output; 293 ifp->if_input = null_input; /* just in case */ 294 ifp->if_resolvemulti = NULL; /* NB: callers check */ 295 296 ifa = ifaddr_byindex(ifp->if_index); 297 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); 298 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 299 sdl->sdl_type = IFT_ETHER; /* XXX IFT_IEEE80211? */ 300 sdl->sdl_alen = IEEE80211_ADDR_LEN; 301 IEEE80211_ADDR_COPY(LLADDR(sdl), macaddr); 302 } 303 304 /* 305 * Detach net80211 state on device detach. Tear down 306 * all vap's and reclaim all common state prior to the 307 * device state going away. Note we may call back into 308 * driver; it must be prepared for this. 309 */ 310 void 311 ieee80211_ifdetach(struct ieee80211com *ic) 312 { 313 struct ifnet *ifp = ic->ic_ifp; 314 struct ieee80211vap *vap; 315 316 while ((vap = TAILQ_FIRST(&ic->ic_vaps)) != NULL) 317 ieee80211_vap_destroy(vap); 318 ieee80211_waitfor_parent(ic); 319 320 ieee80211_sysctl_detach(ic); 321 ieee80211_regdomain_detach(ic); 322 ieee80211_scan_detach(ic); 323 #ifdef IEEE80211_SUPPORT_SUPERG 324 ieee80211_superg_detach(ic); 325 #endif 326 ieee80211_ht_detach(ic); 327 /* NB: must be called before ieee80211_node_detach */ 328 ieee80211_proto_detach(ic); 329 ieee80211_crypto_detach(ic); 330 ieee80211_power_detach(ic); 331 ieee80211_node_detach(ic); 332 ifmedia_removeall(&ic->ic_media); 333 334 taskqueue_free(ic->ic_tq); 335 IEEE80211_LOCK_DESTROY(ic); 336 if_detach(ifp); 337 } 338 339 /* 340 * Default reset method for use with the ioctl support. This 341 * method is invoked after any state change in the 802.11 342 * layer that should be propagated to the hardware but not 343 * require re-initialization of the 802.11 state machine (e.g 344 * rescanning for an ap). We always return ENETRESET which 345 * should cause the driver to re-initialize the device. Drivers 346 * can override this method to implement more optimized support. 347 */ 348 static int 349 default_reset(struct ieee80211vap *vap, u_long cmd) 350 { 351 return ENETRESET; 352 } 353 354 /* 355 * Prepare a vap for use. Drivers use this call to 356 * setup net80211 state in new vap's prior attaching 357 * them with ieee80211_vap_attach (below). 358 */ 359 int 360 ieee80211_vap_setup(struct ieee80211com *ic, struct ieee80211vap *vap, 361 const char name[IFNAMSIZ], int unit, int opmode, int flags, 362 const uint8_t bssid[IEEE80211_ADDR_LEN], 363 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 364 { 365 struct ifnet *ifp; 366 367 ifp = if_alloc(IFT_ETHER); 368 if (ifp == NULL) { 369 if_printf(ic->ic_ifp, "%s: unable to allocate ifnet\n", 370 __func__); 371 return ENOMEM; 372 } 373 if_initname(ifp, name, unit); 374 ifp->if_softc = vap; /* back pointer */ 375 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 376 ifp->if_start = ieee80211_start; 377 ifp->if_ioctl = ieee80211_ioctl; 378 ifp->if_watchdog = NULL; /* NB: no watchdog routine */ 379 ifp->if_init = ieee80211_init; 380 /* NB: input+output filled in by ether_ifattach */ 381 IFQ_SET_MAXLEN(&ifp->if_snd, IFQ_MAXLEN); 382 ifp->if_snd.ifq_drv_maxlen = IFQ_MAXLEN; 383 IFQ_SET_READY(&ifp->if_snd); 384 385 vap->iv_ifp = ifp; 386 vap->iv_ic = ic; 387 vap->iv_flags = ic->ic_flags; /* propagate common flags */ 388 vap->iv_flags_ext = ic->ic_flags_ext; 389 vap->iv_flags_ven = ic->ic_flags_ven; 390 vap->iv_caps = ic->ic_caps &~ IEEE80211_C_OPMODE; 391 vap->iv_htcaps = ic->ic_htcaps; 392 vap->iv_opmode = opmode; 393 vap->iv_caps |= ieee80211_opcap[opmode]; 394 switch (opmode) { 395 case IEEE80211_M_WDS: 396 /* 397 * WDS links must specify the bssid of the far end. 398 * For legacy operation this is a static relationship. 399 * For non-legacy operation the station must associate 400 * and be authorized to pass traffic. Plumbing the 401 * vap to the proper node happens when the vap 402 * transitions to RUN state. 403 */ 404 IEEE80211_ADDR_COPY(vap->iv_des_bssid, bssid); 405 vap->iv_flags |= IEEE80211_F_DESBSSID; 406 if (flags & IEEE80211_CLONE_WDSLEGACY) 407 vap->iv_flags_ext |= IEEE80211_FEXT_WDSLEGACY; 408 break; 409 #ifdef IEEE80211_SUPPORT_TDMA 410 case IEEE80211_M_AHDEMO: 411 if (flags & IEEE80211_CLONE_TDMA) { 412 /* NB: checked before clone operation allowed */ 413 KASSERT(ic->ic_caps & IEEE80211_C_TDMA, 414 ("not TDMA capable, ic_caps 0x%x", ic->ic_caps)); 415 /* 416 * Propagate TDMA capability to mark vap; this 417 * cannot be removed and is used to distinguish 418 * regular ahdemo operation from ahdemo+tdma. 419 */ 420 vap->iv_caps |= IEEE80211_C_TDMA; 421 } 422 break; 423 #endif 424 } 425 /* auto-enable s/w beacon miss support */ 426 if (flags & IEEE80211_CLONE_NOBEACONS) 427 vap->iv_flags_ext |= IEEE80211_FEXT_SWBMISS; 428 /* 429 * Enable various functionality by default if we're 430 * capable; the driver can override us if it knows better. 431 */ 432 if (vap->iv_caps & IEEE80211_C_WME) 433 vap->iv_flags |= IEEE80211_F_WME; 434 if (vap->iv_caps & IEEE80211_C_BURST) 435 vap->iv_flags |= IEEE80211_F_BURST; 436 /* NB: bg scanning only makes sense for station mode right now */ 437 if (vap->iv_opmode == IEEE80211_M_STA && 438 (vap->iv_caps & IEEE80211_C_BGSCAN)) 439 vap->iv_flags |= IEEE80211_F_BGSCAN; 440 vap->iv_flags |= IEEE80211_F_DOTH; /* XXX no cap, just ena */ 441 /* NB: DFS support only makes sense for ap mode right now */ 442 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 443 (vap->iv_caps & IEEE80211_C_DFS)) 444 vap->iv_flags_ext |= IEEE80211_FEXT_DFS; 445 446 vap->iv_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */ 447 vap->iv_bmissthreshold = IEEE80211_HWBMISS_DEFAULT; 448 vap->iv_dtim_period = IEEE80211_DTIM_DEFAULT; 449 /* 450 * Install a default reset method for the ioctl support; 451 * the driver can override this. 452 */ 453 vap->iv_reset = default_reset; 454 455 IEEE80211_ADDR_COPY(vap->iv_myaddr, macaddr); 456 457 ieee80211_sysctl_vattach(vap); 458 ieee80211_crypto_vattach(vap); 459 ieee80211_node_vattach(vap); 460 ieee80211_power_vattach(vap); 461 ieee80211_proto_vattach(vap); 462 #ifdef IEEE80211_SUPPORT_SUPERG 463 ieee80211_superg_vattach(vap); 464 #endif 465 ieee80211_ht_vattach(vap); 466 ieee80211_scan_vattach(vap); 467 ieee80211_regdomain_vattach(vap); 468 469 return 0; 470 } 471 472 /* 473 * Activate a vap. State should have been prepared with a 474 * call to ieee80211_vap_setup and by the driver. On return 475 * from this call the vap is ready for use. 476 */ 477 int 478 ieee80211_vap_attach(struct ieee80211vap *vap, 479 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) 480 { 481 struct ifnet *ifp = vap->iv_ifp; 482 struct ieee80211com *ic = vap->iv_ic; 483 struct ifmediareq imr; 484 int maxrate; 485 486 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 487 "%s: %s parent %s flags 0x%x flags_ext 0x%x\n", 488 __func__, ieee80211_opmode_name[vap->iv_opmode], 489 ic->ic_ifp->if_xname, vap->iv_flags, vap->iv_flags_ext); 490 491 /* 492 * Do late attach work that cannot happen until after 493 * the driver has had a chance to override defaults. 494 */ 495 ieee80211_node_latevattach(vap); 496 ieee80211_power_latevattach(vap); 497 498 maxrate = ieee80211_media_setup(ic, &vap->iv_media, vap->iv_caps, 499 vap->iv_opmode == IEEE80211_M_STA, media_change, media_stat); 500 ieee80211_media_status(ifp, &imr); 501 /* NB: strip explicit mode; we're actually in autoselect */ 502 ifmedia_set(&vap->iv_media, 503 imr.ifm_active &~ (IFM_MMASK | IFM_IEEE80211_TURBO)); 504 if (maxrate) 505 ifp->if_baudrate = IF_Mbps(maxrate); 506 507 ether_ifattach(ifp, vap->iv_myaddr); 508 /* hook output method setup by ether_ifattach */ 509 vap->iv_output = ifp->if_output; 510 ifp->if_output = ieee80211_output; 511 /* NB: if_mtu set by ether_ifattach to ETHERMTU */ 512 bpfattach2(ifp, DLT_IEEE802_11, ifp->if_hdrlen, &vap->iv_rawbpf); 513 514 IEEE80211_LOCK(ic); 515 TAILQ_INSERT_TAIL(&ic->ic_vaps, vap, iv_next); 516 ieee80211_syncflag_locked(ic, IEEE80211_F_WME); 517 #ifdef IEEE80211_SUPPORT_SUPERG 518 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); 519 #endif 520 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); 521 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); 522 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_HT); 523 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_USEHT40); 524 ieee80211_syncifflag_locked(ic, IFF_PROMISC); 525 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI); 526 IEEE80211_UNLOCK(ic); 527 528 return 1; 529 } 530 531 /* 532 * Tear down vap state and reclaim the ifnet. 533 * The driver is assumed to have prepared for 534 * this; e.g. by turning off interrupts for the 535 * underlying device. 536 */ 537 void 538 ieee80211_vap_detach(struct ieee80211vap *vap) 539 { 540 struct ieee80211com *ic = vap->iv_ic; 541 struct ifnet *ifp = vap->iv_ifp; 542 543 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s parent %s\n", 544 __func__, ieee80211_opmode_name[vap->iv_opmode], 545 ic->ic_ifp->if_xname); 546 547 IEEE80211_LOCK(ic); 548 /* block traffic from above */ 549 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 550 /* 551 * Evil hack. Clear the backpointer from the ifnet to the 552 * vap so any requests from above will return an error or 553 * be ignored. In particular this short-circuits requests 554 * by the bridge to turn off promiscuous mode as a result 555 * of calling ether_ifdetach. 556 */ 557 ifp->if_softc = NULL; 558 /* 559 * Stop the vap before detaching the ifnet. Ideally we'd 560 * do this in the other order so the ifnet is inaccessible 561 * while we cleanup internal state but that is hard. 562 */ 563 ieee80211_stop_locked(vap); 564 IEEE80211_UNLOCK(ic); 565 566 /* 567 * Flush any deferred vap tasks. 568 * NB: must be before ether_ifdetach() and removal from ic_vaps list 569 */ 570 ieee80211_draintask(ic, &vap->iv_nstate_task); 571 ieee80211_draintask(ic, &vap->iv_swbmiss_task); 572 573 IEEE80211_LOCK(ic); 574 KASSERT(vap->iv_state == IEEE80211_S_INIT , ("vap still running")); 575 TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next); 576 ieee80211_syncflag_locked(ic, IEEE80211_F_WME); 577 #ifdef IEEE80211_SUPPORT_SUPERG 578 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); 579 #endif 580 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); 581 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); 582 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_HT); 583 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_USEHT40); 584 ieee80211_syncifflag_locked(ic, IFF_PROMISC); 585 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI); 586 IEEE80211_UNLOCK(ic); 587 588 /* XXX can't hold com lock */ 589 /* NB: bpfattach is called by ether_ifdetach and claims all taps */ 590 ether_ifdetach(ifp); 591 592 ifmedia_removeall(&vap->iv_media); 593 594 ieee80211_regdomain_vdetach(vap); 595 ieee80211_scan_vdetach(vap); 596 #ifdef IEEE80211_SUPPORT_SUPERG 597 ieee80211_superg_vdetach(vap); 598 #endif 599 ieee80211_ht_vdetach(vap); 600 /* NB: must be before ieee80211_node_vdetach */ 601 ieee80211_proto_vdetach(vap); 602 ieee80211_crypto_vdetach(vap); 603 ieee80211_power_vdetach(vap); 604 ieee80211_node_vdetach(vap); 605 ieee80211_sysctl_vdetach(vap); 606 607 if_free(ifp); 608 } 609 610 /* 611 * Synchronize flag bit state in the parent ifnet structure 612 * according to the state of all vap ifnet's. This is used, 613 * for example, to handle IFF_PROMISC and IFF_ALLMULTI. 614 */ 615 void 616 ieee80211_syncifflag_locked(struct ieee80211com *ic, int flag) 617 { 618 struct ifnet *ifp = ic->ic_ifp; 619 struct ieee80211vap *vap; 620 int bit, oflags; 621 622 IEEE80211_LOCK_ASSERT(ic); 623 624 bit = 0; 625 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 626 if (vap->iv_ifp->if_flags & flag) { 627 /* 628 * XXX the bridge sets PROMISC but we don't want to 629 * enable it on the device, discard here so all the 630 * drivers don't need to special-case it 631 */ 632 if (flag == IFF_PROMISC && 633 vap->iv_opmode == IEEE80211_M_HOSTAP) 634 continue; 635 bit = 1; 636 break; 637 } 638 oflags = ifp->if_flags; 639 if (bit) 640 ifp->if_flags |= flag; 641 else 642 ifp->if_flags &= ~flag; 643 if ((ifp->if_flags ^ oflags) & flag) { 644 /* XXX should we return 1/0 and let caller do this? */ 645 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 646 if (flag == IFF_PROMISC) 647 ieee80211_runtask(ic, &ic->ic_promisc_task); 648 else if (flag == IFF_ALLMULTI) 649 ieee80211_runtask(ic, &ic->ic_mcast_task); 650 } 651 } 652 } 653 654 /* 655 * Synchronize flag bit state in the com structure 656 * according to the state of all vap's. This is used, 657 * for example, to handle state changes via ioctls. 658 */ 659 static void 660 ieee80211_syncflag_locked(struct ieee80211com *ic, int flag) 661 { 662 struct ieee80211vap *vap; 663 int bit; 664 665 IEEE80211_LOCK_ASSERT(ic); 666 667 bit = 0; 668 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 669 if (vap->iv_flags & flag) { 670 bit = 1; 671 break; 672 } 673 if (bit) 674 ic->ic_flags |= flag; 675 else 676 ic->ic_flags &= ~flag; 677 } 678 679 void 680 ieee80211_syncflag(struct ieee80211vap *vap, int flag) 681 { 682 struct ieee80211com *ic = vap->iv_ic; 683 684 IEEE80211_LOCK(ic); 685 if (flag < 0) { 686 flag = -flag; 687 vap->iv_flags &= ~flag; 688 } else 689 vap->iv_flags |= flag; 690 ieee80211_syncflag_locked(ic, flag); 691 IEEE80211_UNLOCK(ic); 692 } 693 694 /* 695 * Synchronize flag bit state in the com structure 696 * according to the state of all vap's. This is used, 697 * for example, to handle state changes via ioctls. 698 */ 699 static void 700 ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag) 701 { 702 struct ieee80211vap *vap; 703 int bit; 704 705 IEEE80211_LOCK_ASSERT(ic); 706 707 bit = 0; 708 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 709 if (vap->iv_flags_ext & flag) { 710 bit = 1; 711 break; 712 } 713 if (bit) 714 ic->ic_flags_ext |= flag; 715 else 716 ic->ic_flags_ext &= ~flag; 717 } 718 719 void 720 ieee80211_syncflag_ext(struct ieee80211vap *vap, int flag) 721 { 722 struct ieee80211com *ic = vap->iv_ic; 723 724 IEEE80211_LOCK(ic); 725 if (flag < 0) { 726 flag = -flag; 727 vap->iv_flags_ext &= ~flag; 728 } else 729 vap->iv_flags_ext |= flag; 730 ieee80211_syncflag_ext_locked(ic, flag); 731 IEEE80211_UNLOCK(ic); 732 } 733 734 static __inline int 735 mapgsm(u_int freq, u_int flags) 736 { 737 freq *= 10; 738 if (flags & IEEE80211_CHAN_QUARTER) 739 freq += 5; 740 else if (flags & IEEE80211_CHAN_HALF) 741 freq += 10; 742 else 743 freq += 20; 744 /* NB: there is no 907/20 wide but leave room */ 745 return (freq - 906*10) / 5; 746 } 747 748 static __inline int 749 mappsb(u_int freq, u_int flags) 750 { 751 return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5; 752 } 753 754 /* 755 * Convert MHz frequency to IEEE channel number. 756 */ 757 int 758 ieee80211_mhz2ieee(u_int freq, u_int flags) 759 { 760 #define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990) 761 if (flags & IEEE80211_CHAN_GSM) 762 return mapgsm(freq, flags); 763 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 764 if (freq == 2484) 765 return 14; 766 if (freq < 2484) 767 return ((int) freq - 2407) / 5; 768 else 769 return 15 + ((freq - 2512) / 20); 770 } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */ 771 if (freq <= 5000) { 772 /* XXX check regdomain? */ 773 if (IS_FREQ_IN_PSB(freq)) 774 return mappsb(freq, flags); 775 return (freq - 4000) / 5; 776 } else 777 return (freq - 5000) / 5; 778 } else { /* either, guess */ 779 if (freq == 2484) 780 return 14; 781 if (freq < 2484) { 782 if (907 <= freq && freq <= 922) 783 return mapgsm(freq, flags); 784 return ((int) freq - 2407) / 5; 785 } 786 if (freq < 5000) { 787 if (IS_FREQ_IN_PSB(freq)) 788 return mappsb(freq, flags); 789 else if (freq > 4900) 790 return (freq - 4000) / 5; 791 else 792 return 15 + ((freq - 2512) / 20); 793 } 794 return (freq - 5000) / 5; 795 } 796 #undef IS_FREQ_IN_PSB 797 } 798 799 /* 800 * Convert channel to IEEE channel number. 801 */ 802 int 803 ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c) 804 { 805 if (c == NULL) { 806 if_printf(ic->ic_ifp, "invalid channel (NULL)\n"); 807 return 0; /* XXX */ 808 } 809 return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee); 810 } 811 812 /* 813 * Convert IEEE channel number to MHz frequency. 814 */ 815 u_int 816 ieee80211_ieee2mhz(u_int chan, u_int flags) 817 { 818 if (flags & IEEE80211_CHAN_GSM) 819 return 907 + 5 * (chan / 10); 820 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 821 if (chan == 14) 822 return 2484; 823 if (chan < 14) 824 return 2407 + chan*5; 825 else 826 return 2512 + ((chan-15)*20); 827 } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */ 828 if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) { 829 chan -= 37; 830 return 4940 + chan*5 + (chan % 5 ? 2 : 0); 831 } 832 return 5000 + (chan*5); 833 } else { /* either, guess */ 834 /* XXX can't distinguish PSB+GSM channels */ 835 if (chan == 14) 836 return 2484; 837 if (chan < 14) /* 0-13 */ 838 return 2407 + chan*5; 839 if (chan < 27) /* 15-26 */ 840 return 2512 + ((chan-15)*20); 841 return 5000 + (chan*5); 842 } 843 } 844 845 /* 846 * Locate a channel given a frequency+flags. We cache 847 * the previous lookup to optimize switching between two 848 * channels--as happens with dynamic turbo. 849 */ 850 struct ieee80211_channel * 851 ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags) 852 { 853 struct ieee80211_channel *c; 854 int i; 855 856 flags &= IEEE80211_CHAN_ALLTURBO; 857 c = ic->ic_prevchan; 858 if (c != NULL && c->ic_freq == freq && 859 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 860 return c; 861 /* brute force search */ 862 for (i = 0; i < ic->ic_nchans; i++) { 863 c = &ic->ic_channels[i]; 864 if (c->ic_freq == freq && 865 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 866 return c; 867 } 868 return NULL; 869 } 870 871 /* 872 * Locate a channel given a channel number+flags. We cache 873 * the previous lookup to optimize switching between two 874 * channels--as happens with dynamic turbo. 875 */ 876 struct ieee80211_channel * 877 ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags) 878 { 879 struct ieee80211_channel *c; 880 int i; 881 882 flags &= IEEE80211_CHAN_ALLTURBO; 883 c = ic->ic_prevchan; 884 if (c != NULL && c->ic_ieee == ieee && 885 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 886 return c; 887 /* brute force search */ 888 for (i = 0; i < ic->ic_nchans; i++) { 889 c = &ic->ic_channels[i]; 890 if (c->ic_ieee == ieee && 891 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 892 return c; 893 } 894 return NULL; 895 } 896 897 static void 898 addmedia(struct ifmedia *media, int caps, int addsta, int mode, int mword) 899 { 900 #define ADD(_ic, _s, _o) \ 901 ifmedia_add(media, \ 902 IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL) 903 static const u_int mopts[IEEE80211_MODE_MAX] = { 904 [IEEE80211_MODE_AUTO] = IFM_AUTO, 905 [IEEE80211_MODE_11A] = IFM_IEEE80211_11A, 906 [IEEE80211_MODE_11B] = IFM_IEEE80211_11B, 907 [IEEE80211_MODE_11G] = IFM_IEEE80211_11G, 908 [IEEE80211_MODE_FH] = IFM_IEEE80211_FH, 909 [IEEE80211_MODE_TURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO, 910 [IEEE80211_MODE_TURBO_G] = IFM_IEEE80211_11G|IFM_IEEE80211_TURBO, 911 [IEEE80211_MODE_STURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO, 912 [IEEE80211_MODE_HALF] = IFM_IEEE80211_11A, /* XXX */ 913 [IEEE80211_MODE_QUARTER] = IFM_IEEE80211_11A, /* XXX */ 914 [IEEE80211_MODE_11NA] = IFM_IEEE80211_11NA, 915 [IEEE80211_MODE_11NG] = IFM_IEEE80211_11NG, 916 }; 917 u_int mopt; 918 919 mopt = mopts[mode]; 920 if (addsta) 921 ADD(ic, mword, mopt); /* STA mode has no cap */ 922 if (caps & IEEE80211_C_IBSS) 923 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC); 924 if (caps & IEEE80211_C_HOSTAP) 925 ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP); 926 if (caps & IEEE80211_C_AHDEMO) 927 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0); 928 if (caps & IEEE80211_C_MONITOR) 929 ADD(media, mword, mopt | IFM_IEEE80211_MONITOR); 930 if (caps & IEEE80211_C_WDS) 931 ADD(media, mword, mopt | IFM_IEEE80211_WDS); 932 #undef ADD 933 } 934 935 /* 936 * Setup the media data structures according to the channel and 937 * rate tables. 938 */ 939 static int 940 ieee80211_media_setup(struct ieee80211com *ic, 941 struct ifmedia *media, int caps, int addsta, 942 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) 943 { 944 int i, j, mode, rate, maxrate, mword, r; 945 const struct ieee80211_rateset *rs; 946 struct ieee80211_rateset allrates; 947 948 /* 949 * Fill in media characteristics. 950 */ 951 ifmedia_init(media, 0, media_change, media_stat); 952 maxrate = 0; 953 /* 954 * Add media for legacy operating modes. 955 */ 956 memset(&allrates, 0, sizeof(allrates)); 957 for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) { 958 if (isclr(ic->ic_modecaps, mode)) 959 continue; 960 addmedia(media, caps, addsta, mode, IFM_AUTO); 961 if (mode == IEEE80211_MODE_AUTO) 962 continue; 963 rs = &ic->ic_sup_rates[mode]; 964 for (i = 0; i < rs->rs_nrates; i++) { 965 rate = rs->rs_rates[i]; 966 mword = ieee80211_rate2media(ic, rate, mode); 967 if (mword == 0) 968 continue; 969 addmedia(media, caps, addsta, mode, mword); 970 /* 971 * Add legacy rate to the collection of all rates. 972 */ 973 r = rate & IEEE80211_RATE_VAL; 974 for (j = 0; j < allrates.rs_nrates; j++) 975 if (allrates.rs_rates[j] == r) 976 break; 977 if (j == allrates.rs_nrates) { 978 /* unique, add to the set */ 979 allrates.rs_rates[j] = r; 980 allrates.rs_nrates++; 981 } 982 rate = (rate & IEEE80211_RATE_VAL) / 2; 983 if (rate > maxrate) 984 maxrate = rate; 985 } 986 } 987 for (i = 0; i < allrates.rs_nrates; i++) { 988 mword = ieee80211_rate2media(ic, allrates.rs_rates[i], 989 IEEE80211_MODE_AUTO); 990 if (mword == 0) 991 continue; 992 /* NB: remove media options from mword */ 993 addmedia(media, caps, addsta, 994 IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword)); 995 } 996 /* 997 * Add HT/11n media. Note that we do not have enough 998 * bits in the media subtype to express the MCS so we 999 * use a "placeholder" media subtype and any fixed MCS 1000 * must be specified with a different mechanism. 1001 */ 1002 for (; mode <= IEEE80211_MODE_11NG; mode++) { 1003 if (isclr(ic->ic_modecaps, mode)) 1004 continue; 1005 addmedia(media, caps, addsta, mode, IFM_AUTO); 1006 addmedia(media, caps, addsta, mode, IFM_IEEE80211_MCS); 1007 } 1008 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) || 1009 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) { 1010 addmedia(media, caps, addsta, 1011 IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS); 1012 /* XXX could walk htrates */ 1013 /* XXX known array size */ 1014 if (ieee80211_htrates[15].ht40_rate_400ns > maxrate) 1015 maxrate = ieee80211_htrates[15].ht40_rate_400ns; 1016 } 1017 return maxrate; 1018 } 1019 1020 void 1021 ieee80211_media_init(struct ieee80211com *ic) 1022 { 1023 struct ifnet *ifp = ic->ic_ifp; 1024 int maxrate; 1025 1026 /* NB: this works because the structure is initialized to zero */ 1027 if (!LIST_EMPTY(&ic->ic_media.ifm_list)) { 1028 /* 1029 * We are re-initializing the channel list; clear 1030 * the existing media state as the media routines 1031 * don't suppress duplicates. 1032 */ 1033 ifmedia_removeall(&ic->ic_media); 1034 } 1035 ieee80211_chan_init(ic); 1036 1037 /* 1038 * Recalculate media settings in case new channel list changes 1039 * the set of available modes. 1040 */ 1041 maxrate = ieee80211_media_setup(ic, &ic->ic_media, ic->ic_caps, 1, 1042 ieee80211com_media_change, ieee80211com_media_status); 1043 /* NB: strip explicit mode; we're actually in autoselect */ 1044 ifmedia_set(&ic->ic_media, 1045 media_status(ic->ic_opmode, ic->ic_curchan) &~ 1046 (IFM_MMASK | IFM_IEEE80211_TURBO)); 1047 if (maxrate) 1048 ifp->if_baudrate = IF_Mbps(maxrate); 1049 1050 /* XXX need to propagate new media settings to vap's */ 1051 } 1052 1053 /* XXX inline or eliminate? */ 1054 const struct ieee80211_rateset * 1055 ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c) 1056 { 1057 /* XXX does this work for 11ng basic rates? */ 1058 return &ic->ic_sup_rates[ieee80211_chan2mode(c)]; 1059 } 1060 1061 void 1062 ieee80211_announce(struct ieee80211com *ic) 1063 { 1064 struct ifnet *ifp = ic->ic_ifp; 1065 int i, mode, rate, mword; 1066 const struct ieee80211_rateset *rs; 1067 1068 /* NB: skip AUTO since it has no rates */ 1069 for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) { 1070 if (isclr(ic->ic_modecaps, mode)) 1071 continue; 1072 if_printf(ifp, "%s rates: ", ieee80211_phymode_name[mode]); 1073 rs = &ic->ic_sup_rates[mode]; 1074 for (i = 0; i < rs->rs_nrates; i++) { 1075 mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode); 1076 if (mword == 0) 1077 continue; 1078 rate = ieee80211_media2rate(mword); 1079 printf("%s%d%sMbps", (i != 0 ? " " : ""), 1080 rate / 2, ((rate & 0x1) != 0 ? ".5" : "")); 1081 } 1082 printf("\n"); 1083 } 1084 ieee80211_ht_announce(ic); 1085 } 1086 1087 void 1088 ieee80211_announce_channels(struct ieee80211com *ic) 1089 { 1090 const struct ieee80211_channel *c; 1091 char type; 1092 int i, cw; 1093 1094 printf("Chan Freq CW RegPwr MinPwr MaxPwr\n"); 1095 for (i = 0; i < ic->ic_nchans; i++) { 1096 c = &ic->ic_channels[i]; 1097 if (IEEE80211_IS_CHAN_ST(c)) 1098 type = 'S'; 1099 else if (IEEE80211_IS_CHAN_108A(c)) 1100 type = 'T'; 1101 else if (IEEE80211_IS_CHAN_108G(c)) 1102 type = 'G'; 1103 else if (IEEE80211_IS_CHAN_HT(c)) 1104 type = 'n'; 1105 else if (IEEE80211_IS_CHAN_A(c)) 1106 type = 'a'; 1107 else if (IEEE80211_IS_CHAN_ANYG(c)) 1108 type = 'g'; 1109 else if (IEEE80211_IS_CHAN_B(c)) 1110 type = 'b'; 1111 else 1112 type = 'f'; 1113 if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c)) 1114 cw = 40; 1115 else if (IEEE80211_IS_CHAN_HALF(c)) 1116 cw = 10; 1117 else if (IEEE80211_IS_CHAN_QUARTER(c)) 1118 cw = 5; 1119 else 1120 cw = 20; 1121 printf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n" 1122 , c->ic_ieee, c->ic_freq, type 1123 , cw 1124 , IEEE80211_IS_CHAN_HT40U(c) ? '+' : 1125 IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' ' 1126 , c->ic_maxregpower 1127 , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0 1128 , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0 1129 ); 1130 } 1131 } 1132 1133 static int 1134 media2mode(const struct ifmedia_entry *ime, uint32_t flags, uint16_t *mode) 1135 { 1136 switch (IFM_MODE(ime->ifm_media)) { 1137 case IFM_IEEE80211_11A: 1138 *mode = IEEE80211_MODE_11A; 1139 break; 1140 case IFM_IEEE80211_11B: 1141 *mode = IEEE80211_MODE_11B; 1142 break; 1143 case IFM_IEEE80211_11G: 1144 *mode = IEEE80211_MODE_11G; 1145 break; 1146 case IFM_IEEE80211_FH: 1147 *mode = IEEE80211_MODE_FH; 1148 break; 1149 case IFM_IEEE80211_11NA: 1150 *mode = IEEE80211_MODE_11NA; 1151 break; 1152 case IFM_IEEE80211_11NG: 1153 *mode = IEEE80211_MODE_11NG; 1154 break; 1155 case IFM_AUTO: 1156 *mode = IEEE80211_MODE_AUTO; 1157 break; 1158 default: 1159 return 0; 1160 } 1161 /* 1162 * Turbo mode is an ``option''. 1163 * XXX does not apply to AUTO 1164 */ 1165 if (ime->ifm_media & IFM_IEEE80211_TURBO) { 1166 if (*mode == IEEE80211_MODE_11A) { 1167 if (flags & IEEE80211_F_TURBOP) 1168 *mode = IEEE80211_MODE_TURBO_A; 1169 else 1170 *mode = IEEE80211_MODE_STURBO_A; 1171 } else if (*mode == IEEE80211_MODE_11G) 1172 *mode = IEEE80211_MODE_TURBO_G; 1173 else 1174 return 0; 1175 } 1176 /* XXX HT40 +/- */ 1177 return 1; 1178 } 1179 1180 /* 1181 * Handle a media change request on the underlying interface. 1182 */ 1183 int 1184 ieee80211com_media_change(struct ifnet *ifp) 1185 { 1186 return EINVAL; 1187 } 1188 1189 /* 1190 * Handle a media change request on the vap interface. 1191 */ 1192 int 1193 ieee80211_media_change(struct ifnet *ifp) 1194 { 1195 struct ieee80211vap *vap = ifp->if_softc; 1196 struct ifmedia_entry *ime = vap->iv_media.ifm_cur; 1197 uint16_t newmode; 1198 1199 if (!media2mode(ime, vap->iv_flags, &newmode)) 1200 return EINVAL; 1201 if (vap->iv_des_mode != newmode) { 1202 vap->iv_des_mode = newmode; 1203 return ENETRESET; 1204 } 1205 return 0; 1206 } 1207 1208 /* 1209 * Common code to calculate the media status word 1210 * from the operating mode and channel state. 1211 */ 1212 static int 1213 media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan) 1214 { 1215 int status; 1216 1217 status = IFM_IEEE80211; 1218 switch (opmode) { 1219 case IEEE80211_M_STA: 1220 break; 1221 case IEEE80211_M_IBSS: 1222 status |= IFM_IEEE80211_ADHOC; 1223 break; 1224 case IEEE80211_M_HOSTAP: 1225 status |= IFM_IEEE80211_HOSTAP; 1226 break; 1227 case IEEE80211_M_MONITOR: 1228 status |= IFM_IEEE80211_MONITOR; 1229 break; 1230 case IEEE80211_M_AHDEMO: 1231 status |= IFM_IEEE80211_ADHOC | IFM_FLAG0; 1232 break; 1233 case IEEE80211_M_WDS: 1234 status |= IFM_IEEE80211_WDS; 1235 break; 1236 } 1237 if (IEEE80211_IS_CHAN_HTA(chan)) { 1238 status |= IFM_IEEE80211_11NA; 1239 } else if (IEEE80211_IS_CHAN_HTG(chan)) { 1240 status |= IFM_IEEE80211_11NG; 1241 } else if (IEEE80211_IS_CHAN_A(chan)) { 1242 status |= IFM_IEEE80211_11A; 1243 } else if (IEEE80211_IS_CHAN_B(chan)) { 1244 status |= IFM_IEEE80211_11B; 1245 } else if (IEEE80211_IS_CHAN_ANYG(chan)) { 1246 status |= IFM_IEEE80211_11G; 1247 } else if (IEEE80211_IS_CHAN_FHSS(chan)) { 1248 status |= IFM_IEEE80211_FH; 1249 } 1250 /* XXX else complain? */ 1251 1252 if (IEEE80211_IS_CHAN_TURBO(chan)) 1253 status |= IFM_IEEE80211_TURBO; 1254 #if 0 1255 if (IEEE80211_IS_CHAN_HT20(chan)) 1256 status |= IFM_IEEE80211_HT20; 1257 if (IEEE80211_IS_CHAN_HT40(chan)) 1258 status |= IFM_IEEE80211_HT40; 1259 #endif 1260 return status; 1261 } 1262 1263 static void 1264 ieee80211com_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1265 { 1266 struct ieee80211com *ic = ifp->if_l2com; 1267 struct ieee80211vap *vap; 1268 1269 imr->ifm_status = IFM_AVALID; 1270 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1271 if (vap->iv_ifp->if_flags & IFF_UP) { 1272 imr->ifm_status |= IFM_ACTIVE; 1273 break; 1274 } 1275 imr->ifm_active = media_status(ic->ic_opmode, ic->ic_curchan); 1276 if (imr->ifm_status & IFM_ACTIVE) 1277 imr->ifm_current = imr->ifm_active; 1278 } 1279 1280 void 1281 ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1282 { 1283 struct ieee80211vap *vap = ifp->if_softc; 1284 struct ieee80211com *ic = vap->iv_ic; 1285 enum ieee80211_phymode mode; 1286 1287 imr->ifm_status = IFM_AVALID; 1288 /* 1289 * NB: use the current channel's mode to lock down a xmit 1290 * rate only when running; otherwise we may have a mismatch 1291 * in which case the rate will not be convertible. 1292 */ 1293 if (vap->iv_state == IEEE80211_S_RUN) { 1294 imr->ifm_status |= IFM_ACTIVE; 1295 mode = ieee80211_chan2mode(ic->ic_curchan); 1296 } else 1297 mode = IEEE80211_MODE_AUTO; 1298 imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan); 1299 /* 1300 * Calculate a current rate if possible. 1301 */ 1302 if (vap->iv_txparms[mode].ucastrate != IEEE80211_FIXED_RATE_NONE) { 1303 /* 1304 * A fixed rate is set, report that. 1305 */ 1306 imr->ifm_active |= ieee80211_rate2media(ic, 1307 vap->iv_txparms[mode].ucastrate, mode); 1308 } else if (vap->iv_opmode == IEEE80211_M_STA) { 1309 /* 1310 * In station mode report the current transmit rate. 1311 */ 1312 imr->ifm_active |= ieee80211_rate2media(ic, 1313 vap->iv_bss->ni_txrate, mode); 1314 } else 1315 imr->ifm_active |= IFM_AUTO; 1316 if (imr->ifm_status & IFM_ACTIVE) 1317 imr->ifm_current = imr->ifm_active; 1318 } 1319 1320 /* 1321 * Set the current phy mode and recalculate the active channel 1322 * set based on the available channels for this mode. Also 1323 * select a new default/current channel if the current one is 1324 * inappropriate for this mode. 1325 */ 1326 int 1327 ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode) 1328 { 1329 /* 1330 * Adjust basic rates in 11b/11g supported rate set. 1331 * Note that if operating on a hal/quarter rate channel 1332 * this is a noop as those rates sets are different 1333 * and used instead. 1334 */ 1335 if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B) 1336 ieee80211_setbasicrates(&ic->ic_sup_rates[mode], mode); 1337 1338 ic->ic_curmode = mode; 1339 ieee80211_reset_erp(ic); /* reset ERP state */ 1340 1341 return 0; 1342 } 1343 1344 /* 1345 * Return the phy mode for with the specified channel. 1346 */ 1347 enum ieee80211_phymode 1348 ieee80211_chan2mode(const struct ieee80211_channel *chan) 1349 { 1350 1351 if (IEEE80211_IS_CHAN_HTA(chan)) 1352 return IEEE80211_MODE_11NA; 1353 else if (IEEE80211_IS_CHAN_HTG(chan)) 1354 return IEEE80211_MODE_11NG; 1355 else if (IEEE80211_IS_CHAN_108G(chan)) 1356 return IEEE80211_MODE_TURBO_G; 1357 else if (IEEE80211_IS_CHAN_ST(chan)) 1358 return IEEE80211_MODE_STURBO_A; 1359 else if (IEEE80211_IS_CHAN_TURBO(chan)) 1360 return IEEE80211_MODE_TURBO_A; 1361 else if (IEEE80211_IS_CHAN_HALF(chan)) 1362 return IEEE80211_MODE_HALF; 1363 else if (IEEE80211_IS_CHAN_QUARTER(chan)) 1364 return IEEE80211_MODE_QUARTER; 1365 else if (IEEE80211_IS_CHAN_A(chan)) 1366 return IEEE80211_MODE_11A; 1367 else if (IEEE80211_IS_CHAN_ANYG(chan)) 1368 return IEEE80211_MODE_11G; 1369 else if (IEEE80211_IS_CHAN_B(chan)) 1370 return IEEE80211_MODE_11B; 1371 else if (IEEE80211_IS_CHAN_FHSS(chan)) 1372 return IEEE80211_MODE_FH; 1373 1374 /* NB: should not get here */ 1375 printf("%s: cannot map channel to mode; freq %u flags 0x%x\n", 1376 __func__, chan->ic_freq, chan->ic_flags); 1377 return IEEE80211_MODE_11B; 1378 } 1379 1380 struct ratemedia { 1381 u_int match; /* rate + mode */ 1382 u_int media; /* if_media rate */ 1383 }; 1384 1385 static int 1386 findmedia(const struct ratemedia rates[], int n, u_int match) 1387 { 1388 int i; 1389 1390 for (i = 0; i < n; i++) 1391 if (rates[i].match == match) 1392 return rates[i].media; 1393 return IFM_AUTO; 1394 } 1395 1396 /* 1397 * Convert IEEE80211 rate value to ifmedia subtype. 1398 * Rate is either a legacy rate in units of 0.5Mbps 1399 * or an MCS index. 1400 */ 1401 int 1402 ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode) 1403 { 1404 #define N(a) (sizeof(a) / sizeof(a[0])) 1405 static const struct ratemedia rates[] = { 1406 { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 }, 1407 { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 }, 1408 { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 }, 1409 { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 }, 1410 { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 }, 1411 { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 }, 1412 { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 }, 1413 { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 }, 1414 { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 }, 1415 { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 }, 1416 { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 }, 1417 { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 }, 1418 { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 }, 1419 { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 }, 1420 { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 }, 1421 { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 }, 1422 { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 }, 1423 { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 }, 1424 { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 }, 1425 { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 }, 1426 { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 }, 1427 { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 }, 1428 { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 }, 1429 { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 }, 1430 { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 }, 1431 { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 }, 1432 { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 }, 1433 { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 }, 1434 { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 }, 1435 { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 }, 1436 /* NB: OFDM72 doesn't realy exist so we don't handle it */ 1437 }; 1438 static const struct ratemedia htrates[] = { 1439 { 0, IFM_IEEE80211_MCS }, 1440 { 1, IFM_IEEE80211_MCS }, 1441 { 2, IFM_IEEE80211_MCS }, 1442 { 3, IFM_IEEE80211_MCS }, 1443 { 4, IFM_IEEE80211_MCS }, 1444 { 5, IFM_IEEE80211_MCS }, 1445 { 6, IFM_IEEE80211_MCS }, 1446 { 7, IFM_IEEE80211_MCS }, 1447 { 8, IFM_IEEE80211_MCS }, 1448 { 9, IFM_IEEE80211_MCS }, 1449 { 10, IFM_IEEE80211_MCS }, 1450 { 11, IFM_IEEE80211_MCS }, 1451 { 12, IFM_IEEE80211_MCS }, 1452 { 13, IFM_IEEE80211_MCS }, 1453 { 14, IFM_IEEE80211_MCS }, 1454 { 15, IFM_IEEE80211_MCS }, 1455 }; 1456 int m; 1457 1458 /* 1459 * Check 11n rates first for match as an MCS. 1460 */ 1461 if (mode == IEEE80211_MODE_11NA) { 1462 if (rate & IEEE80211_RATE_MCS) { 1463 rate &= ~IEEE80211_RATE_MCS; 1464 m = findmedia(htrates, N(htrates), rate); 1465 if (m != IFM_AUTO) 1466 return m | IFM_IEEE80211_11NA; 1467 } 1468 } else if (mode == IEEE80211_MODE_11NG) { 1469 /* NB: 12 is ambiguous, it will be treated as an MCS */ 1470 if (rate & IEEE80211_RATE_MCS) { 1471 rate &= ~IEEE80211_RATE_MCS; 1472 m = findmedia(htrates, N(htrates), rate); 1473 if (m != IFM_AUTO) 1474 return m | IFM_IEEE80211_11NG; 1475 } 1476 } 1477 rate &= IEEE80211_RATE_VAL; 1478 switch (mode) { 1479 case IEEE80211_MODE_11A: 1480 case IEEE80211_MODE_HALF: /* XXX good 'nuf */ 1481 case IEEE80211_MODE_QUARTER: 1482 case IEEE80211_MODE_11NA: 1483 case IEEE80211_MODE_TURBO_A: 1484 case IEEE80211_MODE_STURBO_A: 1485 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11A); 1486 case IEEE80211_MODE_11B: 1487 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11B); 1488 case IEEE80211_MODE_FH: 1489 return findmedia(rates, N(rates), rate | IFM_IEEE80211_FH); 1490 case IEEE80211_MODE_AUTO: 1491 /* NB: ic may be NULL for some drivers */ 1492 if (ic != NULL && ic->ic_phytype == IEEE80211_T_FH) 1493 return findmedia(rates, N(rates), 1494 rate | IFM_IEEE80211_FH); 1495 /* NB: hack, 11g matches both 11b+11a rates */ 1496 /* fall thru... */ 1497 case IEEE80211_MODE_11G: 1498 case IEEE80211_MODE_11NG: 1499 case IEEE80211_MODE_TURBO_G: 1500 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11G); 1501 } 1502 return IFM_AUTO; 1503 #undef N 1504 } 1505 1506 int 1507 ieee80211_media2rate(int mword) 1508 { 1509 #define N(a) (sizeof(a) / sizeof(a[0])) 1510 static const int ieeerates[] = { 1511 -1, /* IFM_AUTO */ 1512 0, /* IFM_MANUAL */ 1513 0, /* IFM_NONE */ 1514 2, /* IFM_IEEE80211_FH1 */ 1515 4, /* IFM_IEEE80211_FH2 */ 1516 2, /* IFM_IEEE80211_DS1 */ 1517 4, /* IFM_IEEE80211_DS2 */ 1518 11, /* IFM_IEEE80211_DS5 */ 1519 22, /* IFM_IEEE80211_DS11 */ 1520 44, /* IFM_IEEE80211_DS22 */ 1521 12, /* IFM_IEEE80211_OFDM6 */ 1522 18, /* IFM_IEEE80211_OFDM9 */ 1523 24, /* IFM_IEEE80211_OFDM12 */ 1524 36, /* IFM_IEEE80211_OFDM18 */ 1525 48, /* IFM_IEEE80211_OFDM24 */ 1526 72, /* IFM_IEEE80211_OFDM36 */ 1527 96, /* IFM_IEEE80211_OFDM48 */ 1528 108, /* IFM_IEEE80211_OFDM54 */ 1529 144, /* IFM_IEEE80211_OFDM72 */ 1530 0, /* IFM_IEEE80211_DS354k */ 1531 0, /* IFM_IEEE80211_DS512k */ 1532 6, /* IFM_IEEE80211_OFDM3 */ 1533 9, /* IFM_IEEE80211_OFDM4 */ 1534 54, /* IFM_IEEE80211_OFDM27 */ 1535 -1, /* IFM_IEEE80211_MCS */ 1536 }; 1537 return IFM_SUBTYPE(mword) < N(ieeerates) ? 1538 ieeerates[IFM_SUBTYPE(mword)] : 0; 1539 #undef N 1540 } 1541