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 * $FreeBSD: head/sys/net80211/ieee80211.c 206358 2010-04-07 15:29:13Z rpaulo $ 27 * $DragonFly$ 28 */ 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 #include <sys/thread.h> 41 42 #include <net/if.h> 43 #include <net/if_dl.h> 44 #include <net/if_media.h> 45 #include <net/if_types.h> 46 #include <net/ifq_var.h> 47 #include <net/ethernet.h> 48 #include <net/route.h> 49 50 #include <netproto/802_11/ieee80211_var.h> 51 #include <netproto/802_11/ieee80211_regdomain.h> 52 #ifdef IEEE80211_SUPPORT_SUPERG 53 #include <netproto/802_11/ieee80211_superg.h> 54 #endif 55 #include <netproto/802_11/ieee80211_ratectl.h> 56 57 #include <net/bpf.h> 58 59 const char *ieee80211_phymode_name[IEEE80211_MODE_MAX] = { 60 [IEEE80211_MODE_AUTO] = "auto", 61 [IEEE80211_MODE_11A] = "11a", 62 [IEEE80211_MODE_11B] = "11b", 63 [IEEE80211_MODE_11G] = "11g", 64 [IEEE80211_MODE_FH] = "FH", 65 [IEEE80211_MODE_TURBO_A] = "turboA", 66 [IEEE80211_MODE_TURBO_G] = "turboG", 67 [IEEE80211_MODE_STURBO_A] = "sturboA", 68 [IEEE80211_MODE_HALF] = "half", 69 [IEEE80211_MODE_QUARTER] = "quarter", 70 [IEEE80211_MODE_11NA] = "11na", 71 [IEEE80211_MODE_11NG] = "11ng", 72 }; 73 /* map ieee80211_opmode to the corresponding capability bit */ 74 const int ieee80211_opcap[IEEE80211_OPMODE_MAX] = { 75 [IEEE80211_M_IBSS] = IEEE80211_C_IBSS, 76 [IEEE80211_M_WDS] = IEEE80211_C_WDS, 77 [IEEE80211_M_STA] = IEEE80211_C_STA, 78 [IEEE80211_M_AHDEMO] = IEEE80211_C_AHDEMO, 79 [IEEE80211_M_HOSTAP] = IEEE80211_C_HOSTAP, 80 [IEEE80211_M_MONITOR] = IEEE80211_C_MONITOR, 81 #ifdef IEEE80211_SUPPORT_MESH 82 [IEEE80211_M_MBSS] = IEEE80211_C_MBSS, 83 #endif 84 }; 85 86 static const uint8_t ieee80211broadcastaddr[IEEE80211_ADDR_LEN] = 87 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 88 89 static void ieee80211_syncflag_locked(struct ieee80211com *ic, int flag); 90 static void ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag); 91 static void ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag); 92 static int ieee80211_media_setup(struct ieee80211com *ic, 93 struct ifmedia *media, int caps, int addsta, 94 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat); 95 static void ieee80211com_media_status(struct ifnet *, struct ifmediareq *); 96 static int ieee80211com_media_change(struct ifnet *); 97 static int media_status(enum ieee80211_opmode, 98 const struct ieee80211_channel *); 99 100 MALLOC_DEFINE(M_80211_VAP, "80211vap", "802.11 vap state"); 101 102 /* 103 * Default supported rates for 802.11 operation (in IEEE .5Mb units). 104 */ 105 #define B(r) ((r) | IEEE80211_RATE_BASIC) 106 static const struct ieee80211_rateset ieee80211_rateset_11a = 107 { 8, { B(12), 18, B(24), 36, B(48), 72, 96, 108 } }; 108 static const struct ieee80211_rateset ieee80211_rateset_half = 109 { 8, { B(6), 9, B(12), 18, B(24), 36, 48, 54 } }; 110 static const struct ieee80211_rateset ieee80211_rateset_quarter = 111 { 8, { B(3), 4, B(6), 9, B(12), 18, 24, 27 } }; 112 static const struct ieee80211_rateset ieee80211_rateset_11b = 113 { 4, { B(2), B(4), B(11), B(22) } }; 114 /* NB: OFDM rates are handled specially based on mode */ 115 static const struct ieee80211_rateset ieee80211_rateset_11g = 116 { 12, { B(2), B(4), B(11), B(22), 12, 18, 24, 36, 48, 72, 96, 108 } }; 117 #undef B 118 119 /* Global token used for wlan layer and wireless NIC driver layer */ 120 lwkt_token wlan_token; 121 122 /* 123 * Fill in 802.11 available channel set, mark 124 * all available channels as active, and pick 125 * a default channel if not already specified. 126 */ 127 static void 128 ieee80211_chan_init(struct ieee80211com *ic) 129 { 130 #define DEFAULTRATES(m, def) do { \ 131 if (ic->ic_sup_rates[m].rs_nrates == 0) \ 132 ic->ic_sup_rates[m] = def; \ 133 } while (0) 134 struct ieee80211_channel *c; 135 int i; 136 137 KASSERT(0 < ic->ic_nchans && ic->ic_nchans <= IEEE80211_CHAN_MAX, 138 ("invalid number of channels specified: %u", ic->ic_nchans)); 139 memset(ic->ic_chan_avail, 0, sizeof(ic->ic_chan_avail)); 140 memset(ic->ic_modecaps, 0, sizeof(ic->ic_modecaps)); 141 setbit(ic->ic_modecaps, IEEE80211_MODE_AUTO); 142 for (i = 0; i < ic->ic_nchans; i++) { 143 c = &ic->ic_channels[i]; 144 KASSERT(c->ic_flags != 0, ("channel with no flags")); 145 /* 146 * Help drivers that work only with frequencies by filling 147 * in IEEE channel #'s if not already calculated. Note this 148 * mimics similar work done in ieee80211_setregdomain when 149 * changing regulatory state. 150 */ 151 if (c->ic_ieee == 0) 152 c->ic_ieee = ieee80211_mhz2ieee(c->ic_freq,c->ic_flags); 153 if (IEEE80211_IS_CHAN_HT40(c) && c->ic_extieee == 0) 154 c->ic_extieee = ieee80211_mhz2ieee(c->ic_freq + 155 (IEEE80211_IS_CHAN_HT40U(c) ? 20 : -20), 156 c->ic_flags); 157 /* default max tx power to max regulatory */ 158 if (c->ic_maxpower == 0) 159 c->ic_maxpower = 2*c->ic_maxregpower; 160 setbit(ic->ic_chan_avail, c->ic_ieee); 161 /* 162 * Identify mode capabilities. 163 */ 164 if (IEEE80211_IS_CHAN_A(c)) 165 setbit(ic->ic_modecaps, IEEE80211_MODE_11A); 166 if (IEEE80211_IS_CHAN_B(c)) 167 setbit(ic->ic_modecaps, IEEE80211_MODE_11B); 168 if (IEEE80211_IS_CHAN_ANYG(c)) 169 setbit(ic->ic_modecaps, IEEE80211_MODE_11G); 170 if (IEEE80211_IS_CHAN_FHSS(c)) 171 setbit(ic->ic_modecaps, IEEE80211_MODE_FH); 172 if (IEEE80211_IS_CHAN_108A(c)) 173 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_A); 174 if (IEEE80211_IS_CHAN_108G(c)) 175 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_G); 176 if (IEEE80211_IS_CHAN_ST(c)) 177 setbit(ic->ic_modecaps, IEEE80211_MODE_STURBO_A); 178 if (IEEE80211_IS_CHAN_HALF(c)) 179 setbit(ic->ic_modecaps, IEEE80211_MODE_HALF); 180 if (IEEE80211_IS_CHAN_QUARTER(c)) 181 setbit(ic->ic_modecaps, IEEE80211_MODE_QUARTER); 182 if (IEEE80211_IS_CHAN_HTA(c)) 183 setbit(ic->ic_modecaps, IEEE80211_MODE_11NA); 184 if (IEEE80211_IS_CHAN_HTG(c)) 185 setbit(ic->ic_modecaps, IEEE80211_MODE_11NG); 186 } 187 /* initialize candidate channels to all available */ 188 memcpy(ic->ic_chan_active, ic->ic_chan_avail, 189 sizeof(ic->ic_chan_avail)); 190 191 /* sort channel table to allow lookup optimizations */ 192 ieee80211_sort_channels(ic->ic_channels, ic->ic_nchans); 193 194 /* invalidate any previous state */ 195 ic->ic_bsschan = IEEE80211_CHAN_ANYC; 196 ic->ic_prevchan = NULL; 197 ic->ic_csa_newchan = NULL; 198 /* arbitrarily pick the first channel */ 199 ic->ic_curchan = &ic->ic_channels[0]; 200 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 201 202 /* fillin well-known rate sets if driver has not specified */ 203 DEFAULTRATES(IEEE80211_MODE_11B, ieee80211_rateset_11b); 204 DEFAULTRATES(IEEE80211_MODE_11G, ieee80211_rateset_11g); 205 DEFAULTRATES(IEEE80211_MODE_11A, ieee80211_rateset_11a); 206 DEFAULTRATES(IEEE80211_MODE_TURBO_A, ieee80211_rateset_11a); 207 DEFAULTRATES(IEEE80211_MODE_TURBO_G, ieee80211_rateset_11g); 208 DEFAULTRATES(IEEE80211_MODE_STURBO_A, ieee80211_rateset_11a); 209 DEFAULTRATES(IEEE80211_MODE_HALF, ieee80211_rateset_half); 210 DEFAULTRATES(IEEE80211_MODE_QUARTER, ieee80211_rateset_quarter); 211 DEFAULTRATES(IEEE80211_MODE_11NA, ieee80211_rateset_11a); 212 DEFAULTRATES(IEEE80211_MODE_11NG, ieee80211_rateset_11g); 213 214 /* 215 * Set auto mode to reset active channel state and any desired channel. 216 */ 217 (void) ieee80211_setmode(ic, IEEE80211_MODE_AUTO); 218 #undef DEFAULTRATES 219 } 220 221 static void 222 null_update_mcast(struct ifnet *ifp) 223 { 224 if_printf(ifp, "need multicast update callback\n"); 225 } 226 227 static void 228 null_update_promisc(struct ifnet *ifp) 229 { 230 if_printf(ifp, "need promiscuous mode update callback\n"); 231 } 232 233 static int 234 null_transmit(struct ifnet *ifp, struct mbuf *m) 235 { 236 m_freem(m); 237 ifp->if_oerrors++; 238 return EACCES; /* XXX EIO/EPERM? */ 239 } 240 241 static int 242 null_output(struct ifnet *ifp, struct mbuf *m, 243 struct sockaddr *dst, struct rtentry *ro) 244 { 245 if_printf(ifp, "discard raw packet\n"); 246 return null_transmit(ifp, m); 247 } 248 249 static void 250 null_input(struct ifnet *ifp, struct mbuf *m) 251 { 252 if_printf(ifp, "if_input should not be called\n"); 253 m_freem(m); 254 } 255 256 /* 257 * Attach/setup the common net80211 state. Called by 258 * the driver on attach to prior to creating any vap's. 259 */ 260 void 261 ieee80211_ifattach(struct ieee80211com *ic, 262 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 263 { 264 struct ifnet *ifp = ic->ic_ifp; 265 struct sockaddr_dl *sdl; 266 struct ifaddr *ifa; 267 268 KASSERT(ifp->if_type == IFT_IEEE80211, ("if_type %d", ifp->if_type)); 269 270 TAILQ_INIT(&ic->ic_vaps); 271 272 /* Create a taskqueue for all state changes */ 273 ic->ic_tq = taskqueue_create("ic_taskq", M_WAITOK | M_ZERO, 274 taskqueue_thread_enqueue, &ic->ic_tq); 275 taskqueue_start_threads(&ic->ic_tq, 1, TDPRI_KERN_DAEMON, -1, 276 "%s taskq", ifp->if_xname); 277 /* 278 * Fill in 802.11 available channel set, mark all 279 * available channels as active, and pick a default 280 * channel if not already specified. 281 */ 282 ieee80211_media_init(ic); 283 284 ic->ic_update_mcast = null_update_mcast; 285 ic->ic_update_promisc = null_update_promisc; 286 287 ic->ic_hash_key = karc4random(); 288 ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT; 289 ic->ic_lintval = ic->ic_bintval; 290 ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX; 291 292 ieee80211_crypto_attach(ic); 293 ieee80211_node_attach(ic); 294 ieee80211_power_attach(ic); 295 ieee80211_proto_attach(ic); 296 #ifdef IEEE80211_SUPPORT_SUPERG 297 ieee80211_superg_attach(ic); 298 #endif 299 ieee80211_ht_attach(ic); 300 ieee80211_scan_attach(ic); 301 ieee80211_regdomain_attach(ic); 302 ieee80211_dfs_attach(ic); 303 304 ieee80211_sysctl_attach(ic); 305 306 ifp->if_addrlen = IEEE80211_ADDR_LEN; 307 ifp->if_hdrlen = 0; 308 if_attach(ifp, NULL); 309 ifp->if_mtu = IEEE80211_MTU_MAX; 310 ifp->if_broadcastaddr = ieee80211broadcastaddr; 311 ifp->if_output = null_output; 312 ifp->if_input = null_input; /* just in case */ 313 ifp->if_resolvemulti = NULL; /* NB: callers check */ 314 315 ifa = ifaddr_byindex(ifp->if_index); 316 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); 317 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 318 sdl->sdl_type = IFT_ETHER; /* XXX IFT_IEEE80211? */ 319 sdl->sdl_alen = IEEE80211_ADDR_LEN; 320 IEEE80211_ADDR_COPY(LLADDR(sdl), macaddr); 321 // IFAFREE(ifa); 322 } 323 324 /* 325 * Detach net80211 state on device detach. Tear down 326 * all vap's and reclaim all common state prior to the 327 * device state going away. Note we may call back into 328 * driver; it must be prepared for this. 329 */ 330 void 331 ieee80211_ifdetach(struct ieee80211com *ic) 332 { 333 struct ifnet *ifp = ic->ic_ifp; 334 struct ieee80211vap *vap; 335 336 if_detach(ifp); 337 338 while ((vap = TAILQ_FIRST(&ic->ic_vaps)) != NULL) 339 ieee80211_vap_destroy(vap); 340 ieee80211_waitfor_parent(ic); 341 342 ieee80211_sysctl_detach(ic); 343 ieee80211_dfs_detach(ic); 344 ieee80211_regdomain_detach(ic); 345 ieee80211_scan_detach(ic); 346 #ifdef IEEE80211_SUPPORT_SUPERG 347 ieee80211_superg_detach(ic); 348 #endif 349 ieee80211_ht_detach(ic); 350 /* NB: must be called before ieee80211_node_detach */ 351 ieee80211_proto_detach(ic); 352 ieee80211_crypto_detach(ic); 353 ieee80211_power_detach(ic); 354 ieee80211_node_detach(ic); 355 356 ifmedia_removeall(&ic->ic_media); 357 taskqueue_free(ic->ic_tq); 358 } 359 360 /* 361 * Default reset method for use with the ioctl support. This 362 * method is invoked after any state change in the 802.11 363 * layer that should be propagated to the hardware but not 364 * require re-initialization of the 802.11 state machine (e.g 365 * rescanning for an ap). We always return ENETRESET which 366 * should cause the driver to re-initialize the device. Drivers 367 * can override this method to implement more optimized support. 368 */ 369 static int 370 default_reset(struct ieee80211vap *vap, u_long cmd) 371 { 372 return ENETRESET; 373 } 374 375 /* 376 * Prepare a vap for use. Drivers use this call to 377 * setup net80211 state in new vap's prior attaching 378 * them with ieee80211_vap_attach (below). 379 */ 380 int 381 ieee80211_vap_setup(struct ieee80211com *ic, struct ieee80211vap *vap, 382 const char name[IFNAMSIZ], int unit, int opmode, int flags, 383 const uint8_t bssid[IEEE80211_ADDR_LEN], 384 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 385 { 386 struct ifnet *ifp; 387 388 ifp = if_alloc(IFT_ETHER); 389 if (ifp == NULL) { 390 if_printf(ic->ic_ifp, "%s: unable to allocate ifnet\n", 391 __func__); 392 return ENOMEM; 393 } 394 if_initname(ifp, name, unit); 395 ifp->if_softc = vap; /* back pointer */ 396 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 397 ifp->if_start = ieee80211_start; 398 ifp->if_ioctl = ieee80211_ioctl; 399 ifp->if_init = ieee80211_init; 400 /* NB: input+output filled in by ether_ifattach */ 401 ifq_set_maxlen(&ifp->if_snd, IFQ_MAXLEN); 402 ifq_set_ready(&ifp->if_snd); 403 404 vap->iv_ifp = ifp; 405 vap->iv_ic = ic; 406 vap->iv_flags = ic->ic_flags; /* propagate common flags */ 407 vap->iv_flags_ext = ic->ic_flags_ext; 408 vap->iv_flags_ven = ic->ic_flags_ven; 409 vap->iv_caps = ic->ic_caps &~ IEEE80211_C_OPMODE; 410 vap->iv_htcaps = ic->ic_htcaps; 411 vap->iv_opmode = opmode; 412 vap->iv_caps |= ieee80211_opcap[opmode]; 413 switch (opmode) { 414 case IEEE80211_M_WDS: 415 /* 416 * WDS links must specify the bssid of the far end. 417 * For legacy operation this is a static relationship. 418 * For non-legacy operation the station must associate 419 * and be authorized to pass traffic. Plumbing the 420 * vap to the proper node happens when the vap 421 * transitions to RUN state. 422 */ 423 IEEE80211_ADDR_COPY(vap->iv_des_bssid, bssid); 424 vap->iv_flags |= IEEE80211_F_DESBSSID; 425 if (flags & IEEE80211_CLONE_WDSLEGACY) 426 vap->iv_flags_ext |= IEEE80211_FEXT_WDSLEGACY; 427 break; 428 #ifdef IEEE80211_SUPPORT_TDMA 429 case IEEE80211_M_AHDEMO: 430 if (flags & IEEE80211_CLONE_TDMA) { 431 /* NB: checked before clone operation allowed */ 432 KASSERT(ic->ic_caps & IEEE80211_C_TDMA, 433 ("not TDMA capable, ic_caps 0x%x", ic->ic_caps)); 434 /* 435 * Propagate TDMA capability to mark vap; this 436 * cannot be removed and is used to distinguish 437 * regular ahdemo operation from ahdemo+tdma. 438 */ 439 vap->iv_caps |= IEEE80211_C_TDMA; 440 } 441 break; 442 #endif 443 } 444 /* auto-enable s/w beacon miss support */ 445 if (flags & IEEE80211_CLONE_NOBEACONS) 446 vap->iv_flags_ext |= IEEE80211_FEXT_SWBMISS; 447 /* auto-generated or user supplied MAC address */ 448 if (flags & (IEEE80211_CLONE_BSSID|IEEE80211_CLONE_MACADDR)) 449 vap->iv_flags_ext |= IEEE80211_FEXT_UNIQMAC; 450 /* 451 * Enable various functionality by default if we're 452 * capable; the driver can override us if it knows better. 453 */ 454 if (vap->iv_caps & IEEE80211_C_WME) 455 vap->iv_flags |= IEEE80211_F_WME; 456 if (vap->iv_caps & IEEE80211_C_BURST) 457 vap->iv_flags |= IEEE80211_F_BURST; 458 #if 0 459 /* 460 * NB: bg scanning only makes sense for station mode right now 461 * 462 * XXX: bgscan is not necessarily stable, so do not enable it by 463 * default. It messes up atheros drivers for sure. 464 * (tested w/ AR9280). 465 */ 466 if (vap->iv_opmode == IEEE80211_M_STA && 467 (vap->iv_caps & IEEE80211_C_BGSCAN)) 468 vap->iv_flags |= IEEE80211_F_BGSCAN; 469 #endif 470 vap->iv_flags |= IEEE80211_F_DOTH; /* XXX no cap, just ena */ 471 /* NB: DFS support only makes sense for ap mode right now */ 472 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 473 (vap->iv_caps & IEEE80211_C_DFS)) 474 vap->iv_flags_ext |= IEEE80211_FEXT_DFS; 475 476 vap->iv_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */ 477 vap->iv_bmissthreshold = IEEE80211_HWBMISS_DEFAULT; 478 vap->iv_dtim_period = IEEE80211_DTIM_DEFAULT; 479 /* 480 * Install a default reset method for the ioctl support; 481 * the driver can override this. 482 */ 483 vap->iv_reset = default_reset; 484 485 IEEE80211_ADDR_COPY(vap->iv_myaddr, macaddr); 486 487 ieee80211_sysctl_vattach(vap); 488 ieee80211_crypto_vattach(vap); 489 ieee80211_node_vattach(vap); 490 ieee80211_power_vattach(vap); 491 ieee80211_proto_vattach(vap); 492 #ifdef IEEE80211_SUPPORT_SUPERG 493 ieee80211_superg_vattach(vap); 494 #endif 495 ieee80211_ht_vattach(vap); 496 ieee80211_scan_vattach(vap); 497 ieee80211_regdomain_vattach(vap); 498 ieee80211_radiotap_vattach(vap); 499 ieee80211_ratectl_set(vap, IEEE80211_RATECTL_AMRR); 500 501 return 0; 502 } 503 504 /* 505 * Activate a vap. State should have been prepared with a 506 * call to ieee80211_vap_setup and by the driver. On return 507 * from this call the vap is ready for use. 508 */ 509 int 510 ieee80211_vap_attach(struct ieee80211vap *vap, 511 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) 512 { 513 struct ifnet *ifp = vap->iv_ifp; 514 struct ieee80211com *ic = vap->iv_ic; 515 struct ifmediareq imr; 516 int maxrate; 517 518 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 519 "%s: %s parent %s flags 0x%x flags_ext 0x%x\n", 520 __func__, ieee80211_opmode_name[vap->iv_opmode], 521 ic->ic_ifp->if_xname, vap->iv_flags, vap->iv_flags_ext); 522 523 /* 524 * Do late attach work that cannot happen until after 525 * the driver has had a chance to override defaults. 526 */ 527 ieee80211_node_latevattach(vap); 528 ieee80211_power_latevattach(vap); 529 530 maxrate = ieee80211_media_setup(ic, &vap->iv_media, vap->iv_caps, 531 vap->iv_opmode == IEEE80211_M_STA, media_change, media_stat); 532 ieee80211_media_status(ifp, &imr); 533 /* NB: strip explicit mode; we're actually in autoselect */ 534 ifmedia_set(&vap->iv_media, 535 imr.ifm_active &~ (IFM_MMASK | IFM_IEEE80211_TURBO)); 536 if (maxrate) 537 ifp->if_baudrate = IF_Mbps(maxrate); 538 539 ether_ifattach(ifp, vap->iv_myaddr, &wlan_global_serializer); 540 if (vap->iv_opmode == IEEE80211_M_MONITOR) { 541 /* NB: disallow transmit */ 542 #ifdef __FreeBSD__ 543 ifp->if_transmit = null_transmit; 544 #endif 545 ifp->if_output = null_output; 546 } else { 547 /* hook output method setup by ether_ifattach */ 548 vap->iv_output = ifp->if_output; 549 ifp->if_output = ieee80211_output; 550 } 551 /* NB: if_mtu set by ether_ifattach to ETHERMTU */ 552 553 TAILQ_INSERT_TAIL(&ic->ic_vaps, vap, iv_next); 554 ieee80211_syncflag_locked(ic, IEEE80211_F_WME); 555 #ifdef IEEE80211_SUPPORT_SUPERG 556 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); 557 #endif 558 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); 559 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); 560 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT); 561 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40); 562 ieee80211_syncifflag_locked(ic, IFF_PROMISC); 563 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI); 564 565 return 1; 566 } 567 568 /* 569 * Tear down vap state and reclaim the ifnet. 570 * The driver is assumed to have prepared for 571 * this; e.g. by turning off interrupts for the 572 * underlying device. 573 */ 574 void 575 ieee80211_vap_detach(struct ieee80211vap *vap) 576 { 577 struct ieee80211com *ic = vap->iv_ic; 578 struct ifnet *ifp = vap->iv_ifp; 579 580 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s parent %s\n", 581 __func__, ieee80211_opmode_name[vap->iv_opmode], 582 ic->ic_ifp->if_xname); 583 584 /* 585 * NB: bpfdetach is called by ether_ifdetach and claims all taps 586 * 587 * ether_ifdetach() must be called without the serializer held. 588 */ 589 wlan_assert_serialized(); 590 wlan_serialize_exit(); /* exit to block */ 591 ether_ifdetach(ifp); 592 593 wlan_serialize_enter(); /* then reenter */ 594 ieee80211_stop(vap); 595 596 /* 597 * Flush any deferred vap tasks. 598 */ 599 wlan_serialize_exit(); /* exit to block */ 600 ieee80211_draintask(ic, &vap->iv_nstate_task); 601 ieee80211_draintask(ic, &vap->iv_swbmiss_task); 602 wlan_serialize_enter(); /* then reenter */ 603 604 #ifdef __FreeBSD__ 605 /* XXX band-aid until ifnet handles this for us */ 606 taskqueue_drain(taskqueue_swi, &ifp->if_linktask); 607 #endif 608 609 KASSERT(vap->iv_state == IEEE80211_S_INIT , ("vap still running")); 610 TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next); 611 ieee80211_syncflag_locked(ic, IEEE80211_F_WME); 612 #ifdef IEEE80211_SUPPORT_SUPERG 613 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); 614 #endif 615 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); 616 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); 617 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT); 618 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40); 619 /* NB: this handles the bpfdetach done below */ 620 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_BPF); 621 ieee80211_syncifflag_locked(ic, IFF_PROMISC); 622 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI); 623 624 ifmedia_removeall(&vap->iv_media); 625 626 ieee80211_radiotap_vdetach(vap); 627 ieee80211_regdomain_vdetach(vap); 628 ieee80211_scan_vdetach(vap); 629 #ifdef IEEE80211_SUPPORT_SUPERG 630 ieee80211_superg_vdetach(vap); 631 #endif 632 ieee80211_ht_vdetach(vap); 633 /* NB: must be before ieee80211_node_vdetach */ 634 ieee80211_proto_vdetach(vap); 635 ieee80211_crypto_vdetach(vap); 636 ieee80211_power_vdetach(vap); 637 ieee80211_node_vdetach(vap); 638 ieee80211_sysctl_vdetach(vap); 639 640 if_free(ifp); 641 } 642 643 /* 644 * Synchronize flag bit state in the parent ifnet structure 645 * according to the state of all vap ifnet's. This is used, 646 * for example, to handle IFF_PROMISC and IFF_ALLMULTI. 647 */ 648 void 649 ieee80211_syncifflag_locked(struct ieee80211com *ic, int flag) 650 { 651 struct ifnet *ifp = ic->ic_ifp; 652 struct ieee80211vap *vap; 653 int bit, oflags; 654 655 bit = 0; 656 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 657 if (vap->iv_ifp->if_flags & flag) { 658 /* 659 * XXX the bridge sets PROMISC but we don't want to 660 * enable it on the device, discard here so all the 661 * drivers don't need to special-case it 662 */ 663 if (flag == IFF_PROMISC && 664 !(vap->iv_opmode == IEEE80211_M_MONITOR || 665 (vap->iv_opmode == IEEE80211_M_AHDEMO && 666 (vap->iv_caps & IEEE80211_C_TDMA) == 0))) 667 continue; 668 bit = 1; 669 break; 670 } 671 oflags = ifp->if_flags; 672 if (bit) 673 ifp->if_flags |= flag; 674 else 675 ifp->if_flags &= ~flag; 676 if ((ifp->if_flags ^ oflags) & flag) { 677 /* XXX should we return 1/0 and let caller do this? */ 678 if (ifp->if_flags & IFF_RUNNING) { 679 if (flag == IFF_PROMISC) 680 ieee80211_runtask(ic, &ic->ic_promisc_task); 681 else if (flag == IFF_ALLMULTI) 682 ieee80211_runtask(ic, &ic->ic_mcast_task); 683 } 684 } 685 } 686 687 /* 688 * Synchronize flag bit state in the com structure 689 * according to the state of all vap's. This is used, 690 * for example, to handle state changes via ioctls. 691 */ 692 static void 693 ieee80211_syncflag_locked(struct ieee80211com *ic, int flag) 694 { 695 struct ieee80211vap *vap; 696 int bit; 697 698 bit = 0; 699 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 700 if (vap->iv_flags & flag) { 701 bit = 1; 702 break; 703 } 704 if (bit) 705 ic->ic_flags |= flag; 706 else 707 ic->ic_flags &= ~flag; 708 } 709 710 void 711 ieee80211_syncflag(struct ieee80211vap *vap, int flag) 712 { 713 struct ieee80211com *ic = vap->iv_ic; 714 715 if (flag < 0) { 716 flag = -flag; 717 vap->iv_flags &= ~flag; 718 } else 719 vap->iv_flags |= flag; 720 ieee80211_syncflag_locked(ic, flag); 721 } 722 723 /* 724 * Synchronize flags_ht 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 */ 728 static void 729 ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag) 730 { 731 struct ieee80211vap *vap; 732 int bit; 733 734 bit = 0; 735 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 736 if (vap->iv_flags_ht & flag) { 737 bit = 1; 738 break; 739 } 740 if (bit) 741 ic->ic_flags_ht |= flag; 742 else 743 ic->ic_flags_ht &= ~flag; 744 } 745 746 void 747 ieee80211_syncflag_ht(struct ieee80211vap *vap, int flag) 748 { 749 struct ieee80211com *ic = vap->iv_ic; 750 751 if (flag < 0) { 752 flag = -flag; 753 vap->iv_flags_ht &= ~flag; 754 } else 755 vap->iv_flags_ht |= flag; 756 ieee80211_syncflag_ht_locked(ic, flag); 757 } 758 759 /* 760 * Synchronize flags_ext bit state in the com structure 761 * according to the state of all vap's. This is used, 762 * for example, to handle state changes via ioctls. 763 */ 764 static void 765 ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag) 766 { 767 struct ieee80211vap *vap; 768 int bit; 769 770 bit = 0; 771 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 772 if (vap->iv_flags_ext & flag) { 773 bit = 1; 774 break; 775 } 776 if (bit) 777 ic->ic_flags_ext |= flag; 778 else 779 ic->ic_flags_ext &= ~flag; 780 } 781 782 void 783 ieee80211_syncflag_ext(struct ieee80211vap *vap, int flag) 784 { 785 struct ieee80211com *ic = vap->iv_ic; 786 787 if (flag < 0) { 788 flag = -flag; 789 vap->iv_flags_ext &= ~flag; 790 } else 791 vap->iv_flags_ext |= flag; 792 ieee80211_syncflag_ext_locked(ic, flag); 793 } 794 795 static __inline int 796 mapgsm(u_int freq, u_int flags) 797 { 798 freq *= 10; 799 if (flags & IEEE80211_CHAN_QUARTER) 800 freq += 5; 801 else if (flags & IEEE80211_CHAN_HALF) 802 freq += 10; 803 else 804 freq += 20; 805 /* NB: there is no 907/20 wide but leave room */ 806 return (freq - 906*10) / 5; 807 } 808 809 static __inline int 810 mappsb(u_int freq, u_int flags) 811 { 812 return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5; 813 } 814 815 /* 816 * Convert MHz frequency to IEEE channel number. 817 */ 818 int 819 ieee80211_mhz2ieee(u_int freq, u_int flags) 820 { 821 #define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990) 822 if (flags & IEEE80211_CHAN_GSM) 823 return mapgsm(freq, flags); 824 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 825 if (freq == 2484) 826 return 14; 827 if (freq < 2484) 828 return ((int) freq - 2407) / 5; 829 else 830 return 15 + ((freq - 2512) / 20); 831 } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */ 832 if (freq <= 5000) { 833 /* XXX check regdomain? */ 834 if (IS_FREQ_IN_PSB(freq)) 835 return mappsb(freq, flags); 836 return (freq - 4000) / 5; 837 } else 838 return (freq - 5000) / 5; 839 } else { /* either, guess */ 840 if (freq == 2484) 841 return 14; 842 if (freq < 2484) { 843 if (907 <= freq && freq <= 922) 844 return mapgsm(freq, flags); 845 return ((int) freq - 2407) / 5; 846 } 847 if (freq < 5000) { 848 if (IS_FREQ_IN_PSB(freq)) 849 return mappsb(freq, flags); 850 else if (freq > 4900) 851 return (freq - 4000) / 5; 852 else 853 return 15 + ((freq - 2512) / 20); 854 } 855 return (freq - 5000) / 5; 856 } 857 #undef IS_FREQ_IN_PSB 858 } 859 860 /* 861 * Convert channel to IEEE channel number. 862 */ 863 int 864 ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c) 865 { 866 if (c == NULL) { 867 if_printf(ic->ic_ifp, "invalid channel (NULL)\n"); 868 return 0; /* XXX */ 869 } 870 return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee); 871 } 872 873 /* 874 * Convert IEEE channel number to MHz frequency. 875 */ 876 u_int 877 ieee80211_ieee2mhz(u_int chan, u_int flags) 878 { 879 if (flags & IEEE80211_CHAN_GSM) 880 return 907 + 5 * (chan / 10); 881 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 882 if (chan == 14) 883 return 2484; 884 if (chan < 14) 885 return 2407 + chan*5; 886 else 887 return 2512 + ((chan-15)*20); 888 } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */ 889 if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) { 890 chan -= 37; 891 return 4940 + chan*5 + (chan % 5 ? 2 : 0); 892 } 893 return 5000 + (chan*5); 894 } else { /* either, guess */ 895 /* XXX can't distinguish PSB+GSM channels */ 896 if (chan == 14) 897 return 2484; 898 if (chan < 14) /* 0-13 */ 899 return 2407 + chan*5; 900 if (chan < 27) /* 15-26 */ 901 return 2512 + ((chan-15)*20); 902 return 5000 + (chan*5); 903 } 904 } 905 906 /* 907 * Locate a channel given a frequency+flags. We cache 908 * the previous lookup to optimize switching between two 909 * channels--as happens with dynamic turbo. 910 */ 911 struct ieee80211_channel * 912 ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags) 913 { 914 struct ieee80211_channel *c; 915 int i; 916 917 flags &= IEEE80211_CHAN_ALLTURBO; 918 c = ic->ic_prevchan; 919 if (c != NULL && c->ic_freq == freq && 920 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 921 return c; 922 /* brute force search */ 923 for (i = 0; i < ic->ic_nchans; i++) { 924 c = &ic->ic_channels[i]; 925 if (c->ic_freq == freq && 926 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 927 return c; 928 } 929 return NULL; 930 } 931 932 /* 933 * Locate a channel given a channel number+flags. We cache 934 * the previous lookup to optimize switching between two 935 * channels--as happens with dynamic turbo. 936 */ 937 struct ieee80211_channel * 938 ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags) 939 { 940 struct ieee80211_channel *c; 941 int i; 942 943 flags &= IEEE80211_CHAN_ALLTURBO; 944 c = ic->ic_prevchan; 945 if (c != NULL && c->ic_ieee == ieee && 946 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 947 return c; 948 /* brute force search */ 949 for (i = 0; i < ic->ic_nchans; i++) { 950 c = &ic->ic_channels[i]; 951 if (c->ic_ieee == ieee && 952 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 953 return c; 954 } 955 return NULL; 956 } 957 958 static void 959 addmedia(struct ifmedia *media, int caps, int addsta, int mode, int mword) 960 { 961 #define ADD(_ic, _s, _o) \ 962 ifmedia_add(media, \ 963 IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL) 964 static const u_int mopts[IEEE80211_MODE_MAX] = { 965 [IEEE80211_MODE_AUTO] = IFM_AUTO, 966 [IEEE80211_MODE_11A] = IFM_IEEE80211_11A, 967 [IEEE80211_MODE_11B] = IFM_IEEE80211_11B, 968 [IEEE80211_MODE_11G] = IFM_IEEE80211_11G, 969 [IEEE80211_MODE_FH] = IFM_IEEE80211_FH, 970 [IEEE80211_MODE_TURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO, 971 [IEEE80211_MODE_TURBO_G] = IFM_IEEE80211_11G|IFM_IEEE80211_TURBO, 972 [IEEE80211_MODE_STURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO, 973 [IEEE80211_MODE_HALF] = IFM_IEEE80211_11A, /* XXX */ 974 [IEEE80211_MODE_QUARTER] = IFM_IEEE80211_11A, /* XXX */ 975 [IEEE80211_MODE_11NA] = IFM_IEEE80211_11NA, 976 [IEEE80211_MODE_11NG] = IFM_IEEE80211_11NG, 977 }; 978 u_int mopt; 979 980 mopt = mopts[mode]; 981 if (addsta) 982 ADD(ic, mword, mopt); /* STA mode has no cap */ 983 if (caps & IEEE80211_C_IBSS) 984 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC); 985 if (caps & IEEE80211_C_HOSTAP) 986 ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP); 987 if (caps & IEEE80211_C_AHDEMO) 988 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0); 989 if (caps & IEEE80211_C_MONITOR) 990 ADD(media, mword, mopt | IFM_IEEE80211_MONITOR); 991 if (caps & IEEE80211_C_WDS) 992 ADD(media, mword, mopt | IFM_IEEE80211_WDS); 993 if (caps & IEEE80211_C_MBSS) 994 ADD(media, mword, mopt | IFM_IEEE80211_MBSS); 995 #undef ADD 996 } 997 998 /* 999 * Setup the media data structures according to the channel and 1000 * rate tables. 1001 */ 1002 static int 1003 ieee80211_media_setup(struct ieee80211com *ic, 1004 struct ifmedia *media, int caps, int addsta, 1005 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) 1006 { 1007 int i, j, mode, rate, maxrate, mword, r; 1008 const struct ieee80211_rateset *rs; 1009 struct ieee80211_rateset allrates; 1010 1011 /* 1012 * Fill in media characteristics. 1013 */ 1014 ifmedia_init(media, 0, media_change, media_stat); 1015 maxrate = 0; 1016 /* 1017 * Add media for legacy operating modes. 1018 */ 1019 memset(&allrates, 0, sizeof(allrates)); 1020 for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) { 1021 if (isclr(ic->ic_modecaps, mode)) 1022 continue; 1023 addmedia(media, caps, addsta, mode, IFM_AUTO); 1024 if (mode == IEEE80211_MODE_AUTO) 1025 continue; 1026 rs = &ic->ic_sup_rates[mode]; 1027 for (i = 0; i < rs->rs_nrates; i++) { 1028 rate = rs->rs_rates[i]; 1029 mword = ieee80211_rate2media(ic, rate, mode); 1030 if (mword == 0) 1031 continue; 1032 addmedia(media, caps, addsta, mode, mword); 1033 /* 1034 * Add legacy rate to the collection of all rates. 1035 */ 1036 r = rate & IEEE80211_RATE_VAL; 1037 for (j = 0; j < allrates.rs_nrates; j++) 1038 if (allrates.rs_rates[j] == r) 1039 break; 1040 if (j == allrates.rs_nrates) { 1041 /* unique, add to the set */ 1042 allrates.rs_rates[j] = r; 1043 allrates.rs_nrates++; 1044 } 1045 rate = (rate & IEEE80211_RATE_VAL) / 2; 1046 if (rate > maxrate) 1047 maxrate = rate; 1048 } 1049 } 1050 for (i = 0; i < allrates.rs_nrates; i++) { 1051 mword = ieee80211_rate2media(ic, allrates.rs_rates[i], 1052 IEEE80211_MODE_AUTO); 1053 if (mword == 0) 1054 continue; 1055 /* NB: remove media options from mword */ 1056 addmedia(media, caps, addsta, 1057 IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword)); 1058 } 1059 /* 1060 * Add HT/11n media. Note that we do not have enough 1061 * bits in the media subtype to express the MCS so we 1062 * use a "placeholder" media subtype and any fixed MCS 1063 * must be specified with a different mechanism. 1064 */ 1065 for (; mode <= IEEE80211_MODE_11NG; mode++) { 1066 if (isclr(ic->ic_modecaps, mode)) 1067 continue; 1068 addmedia(media, caps, addsta, mode, IFM_AUTO); 1069 addmedia(media, caps, addsta, mode, IFM_IEEE80211_MCS); 1070 } 1071 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) || 1072 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) { 1073 addmedia(media, caps, addsta, 1074 IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS); 1075 /* XXX could walk htrates */ 1076 /* XXX known array size */ 1077 if (ieee80211_htrates[15].ht40_rate_400ns > maxrate) 1078 maxrate = ieee80211_htrates[15].ht40_rate_400ns; 1079 } 1080 return maxrate; 1081 } 1082 1083 void 1084 ieee80211_media_init(struct ieee80211com *ic) 1085 { 1086 struct ifnet *ifp = ic->ic_ifp; 1087 int maxrate; 1088 1089 /* NB: this works because the structure is initialized to zero */ 1090 if (!LIST_EMPTY(&ic->ic_media.ifm_list)) { 1091 /* 1092 * We are re-initializing the channel list; clear 1093 * the existing media state as the media routines 1094 * don't suppress duplicates. 1095 */ 1096 ifmedia_removeall(&ic->ic_media); 1097 } 1098 ieee80211_chan_init(ic); 1099 1100 /* 1101 * Recalculate media settings in case new channel list changes 1102 * the set of available modes. 1103 */ 1104 maxrate = ieee80211_media_setup(ic, &ic->ic_media, ic->ic_caps, 1, 1105 ieee80211com_media_change, ieee80211com_media_status); 1106 /* NB: strip explicit mode; we're actually in autoselect */ 1107 ifmedia_set(&ic->ic_media, 1108 media_status(ic->ic_opmode, ic->ic_curchan) &~ 1109 (IFM_MMASK | IFM_IEEE80211_TURBO)); 1110 if (maxrate) 1111 ifp->if_baudrate = IF_Mbps(maxrate); 1112 1113 /* XXX need to propagate new media settings to vap's */ 1114 } 1115 1116 /* XXX inline or eliminate? */ 1117 const struct ieee80211_rateset * 1118 ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c) 1119 { 1120 /* XXX does this work for 11ng basic rates? */ 1121 return &ic->ic_sup_rates[ieee80211_chan2mode(c)]; 1122 } 1123 1124 void 1125 ieee80211_announce(struct ieee80211com *ic) 1126 { 1127 struct ifnet *ifp = ic->ic_ifp; 1128 int i, mode, rate, mword; 1129 const struct ieee80211_rateset *rs; 1130 1131 /* NB: skip AUTO since it has no rates */ 1132 for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) { 1133 if (isclr(ic->ic_modecaps, mode)) 1134 continue; 1135 if_printf(ifp, "%s rates: ", ieee80211_phymode_name[mode]); 1136 rs = &ic->ic_sup_rates[mode]; 1137 for (i = 0; i < rs->rs_nrates; i++) { 1138 mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode); 1139 if (mword == 0) 1140 continue; 1141 rate = ieee80211_media2rate(mword); 1142 kprintf("%s%d%sMbps", (i != 0 ? " " : ""), 1143 rate / 2, ((rate & 0x1) != 0 ? ".5" : "")); 1144 } 1145 kprintf("\n"); 1146 } 1147 ieee80211_ht_announce(ic); 1148 } 1149 1150 void 1151 ieee80211_announce_channels(struct ieee80211com *ic) 1152 { 1153 const struct ieee80211_channel *c; 1154 char type; 1155 int i, cw; 1156 1157 kprintf("Chan Freq CW RegPwr MinPwr MaxPwr\n"); 1158 for (i = 0; i < ic->ic_nchans; i++) { 1159 c = &ic->ic_channels[i]; 1160 if (IEEE80211_IS_CHAN_ST(c)) 1161 type = 'S'; 1162 else if (IEEE80211_IS_CHAN_108A(c)) 1163 type = 'T'; 1164 else if (IEEE80211_IS_CHAN_108G(c)) 1165 type = 'G'; 1166 else if (IEEE80211_IS_CHAN_HT(c)) 1167 type = 'n'; 1168 else if (IEEE80211_IS_CHAN_A(c)) 1169 type = 'a'; 1170 else if (IEEE80211_IS_CHAN_ANYG(c)) 1171 type = 'g'; 1172 else if (IEEE80211_IS_CHAN_B(c)) 1173 type = 'b'; 1174 else 1175 type = 'f'; 1176 if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c)) 1177 cw = 40; 1178 else if (IEEE80211_IS_CHAN_HALF(c)) 1179 cw = 10; 1180 else if (IEEE80211_IS_CHAN_QUARTER(c)) 1181 cw = 5; 1182 else 1183 cw = 20; 1184 kprintf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n" 1185 , c->ic_ieee, c->ic_freq, type 1186 , cw 1187 , IEEE80211_IS_CHAN_HT40U(c) ? '+' : 1188 IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' ' 1189 , c->ic_maxregpower 1190 , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0 1191 , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0 1192 ); 1193 } 1194 } 1195 1196 static int 1197 media2mode(const struct ifmedia_entry *ime, uint32_t flags, uint16_t *mode) 1198 { 1199 switch (IFM_MODE(ime->ifm_media)) { 1200 case IFM_IEEE80211_11A: 1201 *mode = IEEE80211_MODE_11A; 1202 break; 1203 case IFM_IEEE80211_11B: 1204 *mode = IEEE80211_MODE_11B; 1205 break; 1206 case IFM_IEEE80211_11G: 1207 *mode = IEEE80211_MODE_11G; 1208 break; 1209 case IFM_IEEE80211_FH: 1210 *mode = IEEE80211_MODE_FH; 1211 break; 1212 case IFM_IEEE80211_11NA: 1213 *mode = IEEE80211_MODE_11NA; 1214 break; 1215 case IFM_IEEE80211_11NG: 1216 *mode = IEEE80211_MODE_11NG; 1217 break; 1218 case IFM_AUTO: 1219 *mode = IEEE80211_MODE_AUTO; 1220 break; 1221 default: 1222 return 0; 1223 } 1224 /* 1225 * Turbo mode is an ``option''. 1226 * XXX does not apply to AUTO 1227 */ 1228 if (ime->ifm_media & IFM_IEEE80211_TURBO) { 1229 if (*mode == IEEE80211_MODE_11A) { 1230 if (flags & IEEE80211_F_TURBOP) 1231 *mode = IEEE80211_MODE_TURBO_A; 1232 else 1233 *mode = IEEE80211_MODE_STURBO_A; 1234 } else if (*mode == IEEE80211_MODE_11G) 1235 *mode = IEEE80211_MODE_TURBO_G; 1236 else 1237 return 0; 1238 } 1239 /* XXX HT40 +/- */ 1240 return 1; 1241 } 1242 1243 /* 1244 * Handle a media change request on the underlying interface. 1245 */ 1246 int 1247 ieee80211com_media_change(struct ifnet *ifp) 1248 { 1249 return EINVAL; 1250 } 1251 1252 /* 1253 * Handle a media change request on the vap interface. 1254 */ 1255 int 1256 ieee80211_media_change(struct ifnet *ifp) 1257 { 1258 struct ieee80211vap *vap = ifp->if_softc; 1259 struct ifmedia_entry *ime = vap->iv_media.ifm_cur; 1260 uint16_t newmode; 1261 1262 if (!media2mode(ime, vap->iv_flags, &newmode)) 1263 return EINVAL; 1264 if (vap->iv_des_mode != newmode) { 1265 vap->iv_des_mode = newmode; 1266 /* XXX kick state machine if up+running */ 1267 } 1268 return 0; 1269 } 1270 1271 /* 1272 * Common code to calculate the media status word 1273 * from the operating mode and channel state. 1274 */ 1275 static int 1276 media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan) 1277 { 1278 int status; 1279 1280 status = IFM_IEEE80211; 1281 switch (opmode) { 1282 case IEEE80211_M_STA: 1283 break; 1284 case IEEE80211_M_IBSS: 1285 status |= IFM_IEEE80211_ADHOC; 1286 break; 1287 case IEEE80211_M_HOSTAP: 1288 status |= IFM_IEEE80211_HOSTAP; 1289 break; 1290 case IEEE80211_M_MONITOR: 1291 status |= IFM_IEEE80211_MONITOR; 1292 break; 1293 case IEEE80211_M_AHDEMO: 1294 status |= IFM_IEEE80211_ADHOC | IFM_FLAG0; 1295 break; 1296 case IEEE80211_M_WDS: 1297 status |= IFM_IEEE80211_WDS; 1298 break; 1299 case IEEE80211_M_MBSS: 1300 status |= IFM_IEEE80211_MBSS; 1301 break; 1302 } 1303 if (IEEE80211_IS_CHAN_HTA(chan)) { 1304 status |= IFM_IEEE80211_11NA; 1305 } else if (IEEE80211_IS_CHAN_HTG(chan)) { 1306 status |= IFM_IEEE80211_11NG; 1307 } else if (IEEE80211_IS_CHAN_A(chan)) { 1308 status |= IFM_IEEE80211_11A; 1309 } else if (IEEE80211_IS_CHAN_B(chan)) { 1310 status |= IFM_IEEE80211_11B; 1311 } else if (IEEE80211_IS_CHAN_ANYG(chan)) { 1312 status |= IFM_IEEE80211_11G; 1313 } else if (IEEE80211_IS_CHAN_FHSS(chan)) { 1314 status |= IFM_IEEE80211_FH; 1315 } 1316 /* XXX else complain? */ 1317 1318 if (IEEE80211_IS_CHAN_TURBO(chan)) 1319 status |= IFM_IEEE80211_TURBO; 1320 #if 0 1321 if (IEEE80211_IS_CHAN_HT20(chan)) 1322 status |= IFM_IEEE80211_HT20; 1323 if (IEEE80211_IS_CHAN_HT40(chan)) 1324 status |= IFM_IEEE80211_HT40; 1325 #endif 1326 return status; 1327 } 1328 1329 static void 1330 ieee80211com_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1331 { 1332 struct ieee80211com *ic = ifp->if_l2com; 1333 struct ieee80211vap *vap; 1334 1335 imr->ifm_status = IFM_AVALID; 1336 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1337 if (vap->iv_ifp->if_flags & IFF_UP) { 1338 imr->ifm_status |= IFM_ACTIVE; 1339 break; 1340 } 1341 imr->ifm_active = media_status(ic->ic_opmode, ic->ic_curchan); 1342 if (imr->ifm_status & IFM_ACTIVE) 1343 imr->ifm_current = imr->ifm_active; 1344 } 1345 1346 void 1347 ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1348 { 1349 struct ieee80211vap *vap = ifp->if_softc; 1350 struct ieee80211com *ic = vap->iv_ic; 1351 enum ieee80211_phymode mode; 1352 1353 imr->ifm_status = IFM_AVALID; 1354 /* 1355 * NB: use the current channel's mode to lock down a xmit 1356 * rate only when running; otherwise we may have a mismatch 1357 * in which case the rate will not be convertible. 1358 */ 1359 if (vap->iv_state == IEEE80211_S_RUN) { 1360 imr->ifm_status |= IFM_ACTIVE; 1361 mode = ieee80211_chan2mode(ic->ic_curchan); 1362 } else 1363 mode = IEEE80211_MODE_AUTO; 1364 imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan); 1365 /* 1366 * Calculate a current rate if possible. 1367 */ 1368 if (vap->iv_txparms[mode].ucastrate != IEEE80211_FIXED_RATE_NONE) { 1369 /* 1370 * A fixed rate is set, report that. 1371 */ 1372 imr->ifm_active |= ieee80211_rate2media(ic, 1373 vap->iv_txparms[mode].ucastrate, mode); 1374 } else if (vap->iv_opmode == IEEE80211_M_STA) { 1375 /* 1376 * In station mode report the current transmit rate. 1377 */ 1378 imr->ifm_active |= ieee80211_rate2media(ic, 1379 vap->iv_bss->ni_txrate, mode); 1380 } else 1381 imr->ifm_active |= IFM_AUTO; 1382 if (imr->ifm_status & IFM_ACTIVE) 1383 imr->ifm_current = imr->ifm_active; 1384 } 1385 1386 /* 1387 * Set the current phy mode and recalculate the active channel 1388 * set based on the available channels for this mode. Also 1389 * select a new default/current channel if the current one is 1390 * inappropriate for this mode. 1391 */ 1392 int 1393 ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode) 1394 { 1395 /* 1396 * Adjust basic rates in 11b/11g supported rate set. 1397 * Note that if operating on a hal/quarter rate channel 1398 * this is a noop as those rates sets are different 1399 * and used instead. 1400 */ 1401 if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B) 1402 ieee80211_setbasicrates(&ic->ic_sup_rates[mode], mode); 1403 1404 ic->ic_curmode = mode; 1405 ieee80211_reset_erp(ic); /* reset ERP state */ 1406 1407 return 0; 1408 } 1409 1410 /* 1411 * Return the phy mode for with the specified channel. 1412 */ 1413 enum ieee80211_phymode 1414 ieee80211_chan2mode(const struct ieee80211_channel *chan) 1415 { 1416 1417 if (IEEE80211_IS_CHAN_HTA(chan)) 1418 return IEEE80211_MODE_11NA; 1419 else if (IEEE80211_IS_CHAN_HTG(chan)) 1420 return IEEE80211_MODE_11NG; 1421 else if (IEEE80211_IS_CHAN_108G(chan)) 1422 return IEEE80211_MODE_TURBO_G; 1423 else if (IEEE80211_IS_CHAN_ST(chan)) 1424 return IEEE80211_MODE_STURBO_A; 1425 else if (IEEE80211_IS_CHAN_TURBO(chan)) 1426 return IEEE80211_MODE_TURBO_A; 1427 else if (IEEE80211_IS_CHAN_HALF(chan)) 1428 return IEEE80211_MODE_HALF; 1429 else if (IEEE80211_IS_CHAN_QUARTER(chan)) 1430 return IEEE80211_MODE_QUARTER; 1431 else if (IEEE80211_IS_CHAN_A(chan)) 1432 return IEEE80211_MODE_11A; 1433 else if (IEEE80211_IS_CHAN_ANYG(chan)) 1434 return IEEE80211_MODE_11G; 1435 else if (IEEE80211_IS_CHAN_B(chan)) 1436 return IEEE80211_MODE_11B; 1437 else if (IEEE80211_IS_CHAN_FHSS(chan)) 1438 return IEEE80211_MODE_FH; 1439 1440 /* NB: should not get here */ 1441 kprintf("%s: cannot map channel to mode; freq %u flags 0x%x\n", 1442 __func__, chan->ic_freq, chan->ic_flags); 1443 return IEEE80211_MODE_11B; 1444 } 1445 1446 struct ratemedia { 1447 u_int match; /* rate + mode */ 1448 u_int media; /* if_media rate */ 1449 }; 1450 1451 static int 1452 findmedia(const struct ratemedia rates[], int n, u_int match) 1453 { 1454 int i; 1455 1456 for (i = 0; i < n; i++) 1457 if (rates[i].match == match) 1458 return rates[i].media; 1459 return IFM_AUTO; 1460 } 1461 1462 /* 1463 * Convert IEEE80211 rate value to ifmedia subtype. 1464 * Rate is either a legacy rate in units of 0.5Mbps 1465 * or an MCS index. 1466 */ 1467 int 1468 ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode) 1469 { 1470 static const struct ratemedia rates[] = { 1471 { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 }, 1472 { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 }, 1473 { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 }, 1474 { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 }, 1475 { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 }, 1476 { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 }, 1477 { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 }, 1478 { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 }, 1479 { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 }, 1480 { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 }, 1481 { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 }, 1482 { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 }, 1483 { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 }, 1484 { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 }, 1485 { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 }, 1486 { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 }, 1487 { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 }, 1488 { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 }, 1489 { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 }, 1490 { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 }, 1491 { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 }, 1492 { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 }, 1493 { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 }, 1494 { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 }, 1495 { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 }, 1496 { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 }, 1497 { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 }, 1498 { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 }, 1499 { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 }, 1500 { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 }, 1501 /* NB: OFDM72 doesn't realy exist so we don't handle it */ 1502 }; 1503 static const struct ratemedia htrates[] = { 1504 { 0, IFM_IEEE80211_MCS }, 1505 { 1, IFM_IEEE80211_MCS }, 1506 { 2, IFM_IEEE80211_MCS }, 1507 { 3, IFM_IEEE80211_MCS }, 1508 { 4, IFM_IEEE80211_MCS }, 1509 { 5, IFM_IEEE80211_MCS }, 1510 { 6, IFM_IEEE80211_MCS }, 1511 { 7, IFM_IEEE80211_MCS }, 1512 { 8, IFM_IEEE80211_MCS }, 1513 { 9, IFM_IEEE80211_MCS }, 1514 { 10, IFM_IEEE80211_MCS }, 1515 { 11, IFM_IEEE80211_MCS }, 1516 { 12, IFM_IEEE80211_MCS }, 1517 { 13, IFM_IEEE80211_MCS }, 1518 { 14, IFM_IEEE80211_MCS }, 1519 { 15, IFM_IEEE80211_MCS }, 1520 }; 1521 int m; 1522 1523 /* 1524 * Check 11n rates first for match as an MCS. 1525 */ 1526 if (mode == IEEE80211_MODE_11NA) { 1527 if (rate & IEEE80211_RATE_MCS) { 1528 rate &= ~IEEE80211_RATE_MCS; 1529 m = findmedia(htrates, NELEM(htrates), rate); 1530 if (m != IFM_AUTO) 1531 return m | IFM_IEEE80211_11NA; 1532 } 1533 } else if (mode == IEEE80211_MODE_11NG) { 1534 /* NB: 12 is ambiguous, it will be treated as an MCS */ 1535 if (rate & IEEE80211_RATE_MCS) { 1536 rate &= ~IEEE80211_RATE_MCS; 1537 m = findmedia(htrates, NELEM(htrates), rate); 1538 if (m != IFM_AUTO) 1539 return m | IFM_IEEE80211_11NG; 1540 } 1541 } 1542 rate &= IEEE80211_RATE_VAL; 1543 switch (mode) { 1544 case IEEE80211_MODE_11A: 1545 case IEEE80211_MODE_HALF: /* XXX good 'nuf */ 1546 case IEEE80211_MODE_QUARTER: 1547 case IEEE80211_MODE_11NA: 1548 case IEEE80211_MODE_TURBO_A: 1549 case IEEE80211_MODE_STURBO_A: 1550 return findmedia(rates, NELEM(rates), rate | IFM_IEEE80211_11A); 1551 case IEEE80211_MODE_11B: 1552 return findmedia(rates, NELEM(rates), rate | IFM_IEEE80211_11B); 1553 case IEEE80211_MODE_FH: 1554 return findmedia(rates, NELEM(rates), rate | IFM_IEEE80211_FH); 1555 case IEEE80211_MODE_AUTO: 1556 /* NB: ic may be NULL for some drivers */ 1557 if (ic != NULL && ic->ic_phytype == IEEE80211_T_FH) 1558 return findmedia(rates, NELEM(rates), 1559 rate | IFM_IEEE80211_FH); 1560 /* NB: hack, 11g matches both 11b+11a rates */ 1561 /* fall thru... */ 1562 case IEEE80211_MODE_11G: 1563 case IEEE80211_MODE_11NG: 1564 case IEEE80211_MODE_TURBO_G: 1565 return findmedia(rates, NELEM(rates), rate | IFM_IEEE80211_11G); 1566 } 1567 return IFM_AUTO; 1568 } 1569 1570 int 1571 ieee80211_media2rate(int mword) 1572 { 1573 static const int ieeerates[] = { 1574 -1, /* IFM_AUTO */ 1575 0, /* IFM_MANUAL */ 1576 0, /* IFM_NONE */ 1577 2, /* IFM_IEEE80211_FH1 */ 1578 4, /* IFM_IEEE80211_FH2 */ 1579 2, /* IFM_IEEE80211_DS1 */ 1580 4, /* IFM_IEEE80211_DS2 */ 1581 11, /* IFM_IEEE80211_DS5 */ 1582 22, /* IFM_IEEE80211_DS11 */ 1583 44, /* IFM_IEEE80211_DS22 */ 1584 12, /* IFM_IEEE80211_OFDM6 */ 1585 18, /* IFM_IEEE80211_OFDM9 */ 1586 24, /* IFM_IEEE80211_OFDM12 */ 1587 36, /* IFM_IEEE80211_OFDM18 */ 1588 48, /* IFM_IEEE80211_OFDM24 */ 1589 72, /* IFM_IEEE80211_OFDM36 */ 1590 96, /* IFM_IEEE80211_OFDM48 */ 1591 108, /* IFM_IEEE80211_OFDM54 */ 1592 144, /* IFM_IEEE80211_OFDM72 */ 1593 0, /* IFM_IEEE80211_DS354k */ 1594 0, /* IFM_IEEE80211_DS512k */ 1595 6, /* IFM_IEEE80211_OFDM3 */ 1596 9, /* IFM_IEEE80211_OFDM4 */ 1597 54, /* IFM_IEEE80211_OFDM27 */ 1598 -1, /* IFM_IEEE80211_MCS */ 1599 }; 1600 return IFM_SUBTYPE(mword) < NELEM(ieeerates) ? 1601 ieeerates[IFM_SUBTYPE(mword)] : 0; 1602 } 1603 1604 /* 1605 * The following hash function is adapted from "Hash Functions" by Bob Jenkins 1606 * ("Algorithm Alley", Dr. Dobbs Journal, September 1997). 1607 */ 1608 #define mix(a, b, c) \ 1609 do { \ 1610 a -= b; a -= c; a ^= (c >> 13); \ 1611 b -= c; b -= a; b ^= (a << 8); \ 1612 c -= a; c -= b; c ^= (b >> 13); \ 1613 a -= b; a -= c; a ^= (c >> 12); \ 1614 b -= c; b -= a; b ^= (a << 16); \ 1615 c -= a; c -= b; c ^= (b >> 5); \ 1616 a -= b; a -= c; a ^= (c >> 3); \ 1617 b -= c; b -= a; b ^= (a << 10); \ 1618 c -= a; c -= b; c ^= (b >> 15); \ 1619 } while (/*CONSTCOND*/0) 1620 1621 uint32_t 1622 ieee80211_mac_hash(const struct ieee80211com *ic, 1623 const uint8_t addr[IEEE80211_ADDR_LEN]) 1624 { 1625 uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = ic->ic_hash_key; 1626 1627 b += addr[5] << 8; 1628 b += addr[4]; 1629 a += addr[3] << 24; 1630 a += addr[2] << 16; 1631 a += addr[1] << 8; 1632 a += addr[0]; 1633 1634 mix(a, b, c); 1635 1636 return c; 1637 } 1638 #undef mix 1639