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 */ 28 29 /* 30 * IEEE 802.11 generic handler 31 */ 32 #include "opt_wlan.h" 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/kernel.h> 37 38 #include <sys/socket.h> 39 #include <sys/thread.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/ifq_var.h> 46 #include <net/ethernet.h> 47 #include <net/route.h> 48 49 #include <netproto/802_11/ieee80211_var.h> 50 #include <netproto/802_11/ieee80211_regdomain.h> 51 #ifdef IEEE80211_SUPPORT_SUPERG 52 #include <netproto/802_11/ieee80211_superg.h> 53 #endif 54 #include <netproto/802_11/ieee80211_ratectl.h> 55 56 #include <net/bpf.h> 57 58 const char *ieee80211_phymode_name[IEEE80211_MODE_MAX] = { 59 [IEEE80211_MODE_AUTO] = "auto", 60 [IEEE80211_MODE_11A] = "11a", 61 [IEEE80211_MODE_11B] = "11b", 62 [IEEE80211_MODE_11G] = "11g", 63 [IEEE80211_MODE_FH] = "FH", 64 [IEEE80211_MODE_TURBO_A] = "turboA", 65 [IEEE80211_MODE_TURBO_G] = "turboG", 66 [IEEE80211_MODE_STURBO_A] = "sturboA", 67 [IEEE80211_MODE_HALF] = "half", 68 [IEEE80211_MODE_QUARTER] = "quarter", 69 [IEEE80211_MODE_11NA] = "11na", 70 [IEEE80211_MODE_11NG] = "11ng", 71 }; 72 /* map ieee80211_opmode to the corresponding capability bit */ 73 const int ieee80211_opcap[IEEE80211_OPMODE_MAX] = { 74 [IEEE80211_M_IBSS] = IEEE80211_C_IBSS, 75 [IEEE80211_M_WDS] = IEEE80211_C_WDS, 76 [IEEE80211_M_STA] = IEEE80211_C_STA, 77 [IEEE80211_M_AHDEMO] = IEEE80211_C_AHDEMO, 78 [IEEE80211_M_HOSTAP] = IEEE80211_C_HOSTAP, 79 [IEEE80211_M_MONITOR] = IEEE80211_C_MONITOR, 80 #ifdef IEEE80211_SUPPORT_MESH 81 [IEEE80211_M_MBSS] = IEEE80211_C_MBSS, 82 #endif 83 }; 84 85 static const uint8_t ieee80211broadcastaddr[IEEE80211_ADDR_LEN] = 86 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 87 88 static void ieee80211_syncflag_locked(struct ieee80211com *ic, int flag); 89 static void ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag); 90 static void ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag); 91 static int ieee80211_media_setup(struct ieee80211com *ic, 92 struct ifmedia *media, int caps, int addsta, 93 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat); 94 static void ieee80211com_media_status(struct ifnet *, struct ifmediareq *); 95 static int ieee80211com_media_change(struct ifnet *); 96 static int media_status(enum ieee80211_opmode, 97 const struct ieee80211_channel *); 98 99 MALLOC_DEFINE(M_80211_VAP, "80211vap", "802.11 vap state"); 100 101 /* 102 * Default supported rates for 802.11 operation (in IEEE .5Mb units). 103 */ 104 #define B(r) ((r) | IEEE80211_RATE_BASIC) 105 static const struct ieee80211_rateset ieee80211_rateset_11a = 106 { 8, { B(12), 18, B(24), 36, B(48), 72, 96, 108 } }; 107 static const struct ieee80211_rateset ieee80211_rateset_half = 108 { 8, { B(6), 9, B(12), 18, B(24), 36, 48, 54 } }; 109 static const struct ieee80211_rateset ieee80211_rateset_quarter = 110 { 8, { B(3), 4, B(6), 9, B(12), 18, 24, 27 } }; 111 static const struct ieee80211_rateset ieee80211_rateset_11b = 112 { 4, { B(2), B(4), B(11), B(22) } }; 113 /* NB: OFDM rates are handled specially based on mode */ 114 static const struct ieee80211_rateset ieee80211_rateset_11g = 115 { 12, { B(2), B(4), B(11), B(22), 12, 18, 24, 36, 48, 72, 96, 108 } }; 116 #undef B 117 118 /* Global token used for wlan layer and wireless NIC driver layer */ 119 lwkt_token wlan_token; 120 121 /* 122 * Fill in 802.11 available channel set, mark 123 * all available channels as active, and pick 124 * a default channel if not already specified. 125 */ 126 static void 127 ieee80211_chan_init(struct ieee80211com *ic) 128 { 129 #define DEFAULTRATES(m, def) do { \ 130 if (ic->ic_sup_rates[m].rs_nrates == 0) \ 131 ic->ic_sup_rates[m] = def; \ 132 } while (0) 133 struct ieee80211_channel *c; 134 int i; 135 136 KASSERT(0 < ic->ic_nchans && ic->ic_nchans <= IEEE80211_CHAN_MAX, 137 ("invalid number of channels specified: %u", ic->ic_nchans)); 138 memset(ic->ic_chan_avail, 0, sizeof(ic->ic_chan_avail)); 139 memset(ic->ic_modecaps, 0, sizeof(ic->ic_modecaps)); 140 setbit(ic->ic_modecaps, IEEE80211_MODE_AUTO); 141 for (i = 0; i < ic->ic_nchans; i++) { 142 c = &ic->ic_channels[i]; 143 KASSERT(c->ic_flags != 0, ("channel with no flags")); 144 /* 145 * Help drivers that work only with frequencies by filling 146 * in IEEE channel #'s if not already calculated. Note this 147 * mimics similar work done in ieee80211_setregdomain when 148 * changing regulatory state. 149 */ 150 if (c->ic_ieee == 0) 151 c->ic_ieee = ieee80211_mhz2ieee(c->ic_freq,c->ic_flags); 152 if (IEEE80211_IS_CHAN_HT40(c) && c->ic_extieee == 0) 153 c->ic_extieee = ieee80211_mhz2ieee(c->ic_freq + 154 (IEEE80211_IS_CHAN_HT40U(c) ? 20 : -20), 155 c->ic_flags); 156 /* default max tx power to max regulatory */ 157 if (c->ic_maxpower == 0) 158 c->ic_maxpower = 2*c->ic_maxregpower; 159 setbit(ic->ic_chan_avail, c->ic_ieee); 160 /* 161 * Identify mode capabilities. 162 */ 163 if (IEEE80211_IS_CHAN_A(c)) 164 setbit(ic->ic_modecaps, IEEE80211_MODE_11A); 165 if (IEEE80211_IS_CHAN_B(c)) 166 setbit(ic->ic_modecaps, IEEE80211_MODE_11B); 167 if (IEEE80211_IS_CHAN_ANYG(c)) 168 setbit(ic->ic_modecaps, IEEE80211_MODE_11G); 169 if (IEEE80211_IS_CHAN_FHSS(c)) 170 setbit(ic->ic_modecaps, IEEE80211_MODE_FH); 171 if (IEEE80211_IS_CHAN_108A(c)) 172 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_A); 173 if (IEEE80211_IS_CHAN_108G(c)) 174 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_G); 175 if (IEEE80211_IS_CHAN_ST(c)) 176 setbit(ic->ic_modecaps, IEEE80211_MODE_STURBO_A); 177 if (IEEE80211_IS_CHAN_HALF(c)) 178 setbit(ic->ic_modecaps, IEEE80211_MODE_HALF); 179 if (IEEE80211_IS_CHAN_QUARTER(c)) 180 setbit(ic->ic_modecaps, IEEE80211_MODE_QUARTER); 181 if (IEEE80211_IS_CHAN_HTA(c)) 182 setbit(ic->ic_modecaps, IEEE80211_MODE_11NA); 183 if (IEEE80211_IS_CHAN_HTG(c)) 184 setbit(ic->ic_modecaps, IEEE80211_MODE_11NG); 185 } 186 /* initialize candidate channels to all available */ 187 memcpy(ic->ic_chan_active, ic->ic_chan_avail, 188 sizeof(ic->ic_chan_avail)); 189 190 /* sort channel table to allow lookup optimizations */ 191 ieee80211_sort_channels(ic->ic_channels, ic->ic_nchans); 192 193 /* invalidate any previous state */ 194 ic->ic_bsschan = IEEE80211_CHAN_ANYC; 195 ic->ic_prevchan = NULL; 196 ic->ic_csa_newchan = NULL; 197 /* arbitrarily pick the first channel */ 198 ic->ic_curchan = &ic->ic_channels[0]; 199 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 200 201 /* fillin well-known rate sets if driver has not specified */ 202 DEFAULTRATES(IEEE80211_MODE_11B, ieee80211_rateset_11b); 203 DEFAULTRATES(IEEE80211_MODE_11G, ieee80211_rateset_11g); 204 DEFAULTRATES(IEEE80211_MODE_11A, ieee80211_rateset_11a); 205 DEFAULTRATES(IEEE80211_MODE_TURBO_A, ieee80211_rateset_11a); 206 DEFAULTRATES(IEEE80211_MODE_TURBO_G, ieee80211_rateset_11g); 207 DEFAULTRATES(IEEE80211_MODE_STURBO_A, ieee80211_rateset_11a); 208 DEFAULTRATES(IEEE80211_MODE_HALF, ieee80211_rateset_half); 209 DEFAULTRATES(IEEE80211_MODE_QUARTER, ieee80211_rateset_quarter); 210 DEFAULTRATES(IEEE80211_MODE_11NA, ieee80211_rateset_11a); 211 DEFAULTRATES(IEEE80211_MODE_11NG, ieee80211_rateset_11g); 212 213 /* 214 * Set auto mode to reset active channel state and any desired channel. 215 */ 216 (void) ieee80211_setmode(ic, IEEE80211_MODE_AUTO); 217 #undef DEFAULTRATES 218 } 219 220 static void 221 null_update_mcast(struct ifnet *ifp) 222 { 223 if_printf(ifp, "need multicast update callback\n"); 224 } 225 226 static void 227 null_update_promisc(struct ifnet *ifp) 228 { 229 if_printf(ifp, "need promiscuous mode update callback\n"); 230 } 231 232 static int 233 null_transmit(struct ifnet *ifp, struct mbuf *m) 234 { 235 m_freem(m); 236 ifp->if_oerrors++; 237 return EACCES; /* XXX EIO/EPERM? */ 238 } 239 240 static int 241 null_output(struct ifnet *ifp, struct mbuf *m, 242 struct sockaddr *dst, struct rtentry *ro) 243 { 244 if_printf(ifp, "discard raw packet\n"); 245 return null_transmit(ifp, m); 246 } 247 248 static void 249 null_input(struct ifnet *ifp, struct mbuf *m) 250 { 251 if_printf(ifp, "if_input should not be called\n"); 252 m_freem(m); 253 } 254 255 /* 256 * Attach/setup the common net80211 state. Called by 257 * the driver on attach to prior to creating any vap's. 258 */ 259 void 260 ieee80211_ifattach(struct ieee80211com *ic, 261 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 262 { 263 struct ifnet *ifp = ic->ic_ifp; 264 struct sockaddr_dl *sdl; 265 struct ifaddr *ifa; 266 267 KASSERT(ifp->if_type == IFT_IEEE80211, ("if_type %d", ifp->if_type)); 268 269 TAILQ_INIT(&ic->ic_vaps); 270 271 /* Create a taskqueue for all state changes */ 272 ic->ic_tq = taskqueue_create("ic_taskq", M_WAITOK | M_ZERO, 273 taskqueue_thread_enqueue, &ic->ic_tq); 274 taskqueue_start_threads(&ic->ic_tq, 1, TDPRI_KERN_DAEMON, -1, 275 "%s taskq", ifp->if_xname); 276 /* 277 * Fill in 802.11 available channel set, mark all 278 * available channels as active, and pick a default 279 * channel if not already specified. 280 */ 281 ieee80211_media_init(ic); 282 283 ic->ic_update_mcast = null_update_mcast; 284 ic->ic_update_promisc = null_update_promisc; 285 286 ic->ic_hash_key = karc4random(); 287 ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT; 288 ic->ic_lintval = ic->ic_bintval; 289 ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX; 290 291 ieee80211_crypto_attach(ic); 292 ieee80211_node_attach(ic); 293 ieee80211_power_attach(ic); 294 ieee80211_proto_attach(ic); 295 #ifdef IEEE80211_SUPPORT_SUPERG 296 ieee80211_superg_attach(ic); 297 #endif 298 ieee80211_ht_attach(ic); 299 ieee80211_scan_attach(ic); 300 ieee80211_regdomain_attach(ic); 301 ieee80211_dfs_attach(ic); 302 303 ieee80211_sysctl_attach(ic); 304 305 ifp->if_addrlen = IEEE80211_ADDR_LEN; 306 ifp->if_hdrlen = 0; 307 if_attach(ifp, NULL); 308 ifp->if_mtu = IEEE80211_MTU_MAX; 309 ifp->if_broadcastaddr = ieee80211broadcastaddr; 310 ifp->if_output = null_output; 311 ifp->if_input = null_input; /* just in case */ 312 ifp->if_resolvemulti = NULL; /* NB: callers check */ 313 314 ifa = ifaddr_byindex(ifp->if_index); 315 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); 316 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 317 sdl->sdl_type = IFT_ETHER; /* XXX IFT_IEEE80211? */ 318 sdl->sdl_alen = IEEE80211_ADDR_LEN; 319 IEEE80211_ADDR_COPY(LLADDR(sdl), macaddr); 320 // IFAFREE(ifa); 321 } 322 323 /* 324 * Detach net80211 state on device detach. Tear down 325 * all vap's and reclaim all common state prior to the 326 * device state going away. Note we may call back into 327 * driver; it must be prepared for this. 328 */ 329 void 330 ieee80211_ifdetach(struct ieee80211com *ic) 331 { 332 struct ifnet *ifp = ic->ic_ifp; 333 struct ieee80211vap *vap; 334 335 if_detach(ifp); 336 337 while ((vap = TAILQ_FIRST(&ic->ic_vaps)) != NULL) 338 ieee80211_vap_destroy(vap); 339 ieee80211_waitfor_parent(ic); 340 341 ieee80211_sysctl_detach(ic); 342 ieee80211_dfs_detach(ic); 343 ieee80211_regdomain_detach(ic); 344 ieee80211_scan_detach(ic); 345 #ifdef IEEE80211_SUPPORT_SUPERG 346 ieee80211_superg_detach(ic); 347 #endif 348 ieee80211_ht_detach(ic); 349 /* NB: must be called before ieee80211_node_detach */ 350 ieee80211_proto_detach(ic); 351 ieee80211_crypto_detach(ic); 352 ieee80211_power_detach(ic); 353 ieee80211_node_detach(ic); 354 355 ifmedia_removeall(&ic->ic_media); 356 taskqueue_free(ic->ic_tq); 357 } 358 359 /* 360 * Default reset method for use with the ioctl support. This 361 * method is invoked after any state change in the 802.11 362 * layer that should be propagated to the hardware but not 363 * require re-initialization of the 802.11 state machine (e.g 364 * rescanning for an ap). We always return ENETRESET which 365 * should cause the driver to re-initialize the device. Drivers 366 * can override this method to implement more optimized support. 367 */ 368 static int 369 default_reset(struct ieee80211vap *vap, u_long cmd) 370 { 371 return ENETRESET; 372 } 373 374 /* 375 * Prepare a vap for use. Drivers use this call to 376 * setup net80211 state in new vap's prior attaching 377 * them with ieee80211_vap_attach (below). 378 */ 379 int 380 ieee80211_vap_setup(struct ieee80211com *ic, struct ieee80211vap *vap, 381 const char name[IFNAMSIZ], int unit, int opmode, int flags, 382 const uint8_t bssid[IEEE80211_ADDR_LEN], 383 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 384 { 385 struct ifnet *ifp; 386 387 ifp = if_alloc(IFT_ETHER); 388 if (ifp == NULL) { 389 if_printf(ic->ic_ifp, "%s: unable to allocate ifnet\n", 390 __func__); 391 return ENOMEM; 392 } 393 if_initname(ifp, name, unit); 394 ifp->if_softc = vap; /* back pointer */ 395 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 396 ifp->if_start = ieee80211_start; 397 ifp->if_ioctl = ieee80211_ioctl; 398 ifp->if_init = ieee80211_init; 399 /* NB: input+output filled in by ether_ifattach */ 400 ifq_set_maxlen(&ifp->if_snd, IFQ_MAXLEN); 401 ifq_set_ready(&ifp->if_snd); 402 403 vap->iv_ifp = ifp; 404 vap->iv_ic = ic; 405 vap->iv_flags = ic->ic_flags; /* propagate common flags */ 406 vap->iv_flags_ext = ic->ic_flags_ext; 407 vap->iv_flags_ven = ic->ic_flags_ven; 408 vap->iv_caps = ic->ic_caps &~ IEEE80211_C_OPMODE; 409 vap->iv_htcaps = ic->ic_htcaps; 410 vap->iv_opmode = opmode; 411 vap->iv_caps |= ieee80211_opcap[opmode]; 412 switch (opmode) { 413 case IEEE80211_M_WDS: 414 /* 415 * WDS links must specify the bssid of the far end. 416 * For legacy operation this is a static relationship. 417 * For non-legacy operation the station must associate 418 * and be authorized to pass traffic. Plumbing the 419 * vap to the proper node happens when the vap 420 * transitions to RUN state. 421 */ 422 IEEE80211_ADDR_COPY(vap->iv_des_bssid, bssid); 423 vap->iv_flags |= IEEE80211_F_DESBSSID; 424 if (flags & IEEE80211_CLONE_WDSLEGACY) 425 vap->iv_flags_ext |= IEEE80211_FEXT_WDSLEGACY; 426 break; 427 #ifdef IEEE80211_SUPPORT_TDMA 428 case IEEE80211_M_AHDEMO: 429 if (flags & IEEE80211_CLONE_TDMA) { 430 /* NB: checked before clone operation allowed */ 431 KASSERT(ic->ic_caps & IEEE80211_C_TDMA, 432 ("not TDMA capable, ic_caps 0x%x", ic->ic_caps)); 433 /* 434 * Propagate TDMA capability to mark vap; this 435 * cannot be removed and is used to distinguish 436 * regular ahdemo operation from ahdemo+tdma. 437 */ 438 vap->iv_caps |= IEEE80211_C_TDMA; 439 } 440 break; 441 #endif 442 } 443 /* auto-enable s/w beacon miss support */ 444 if (flags & IEEE80211_CLONE_NOBEACONS) 445 vap->iv_flags_ext |= IEEE80211_FEXT_SWBMISS; 446 /* auto-generated or user supplied MAC address */ 447 if (flags & (IEEE80211_CLONE_BSSID|IEEE80211_CLONE_MACADDR)) 448 vap->iv_flags_ext |= IEEE80211_FEXT_UNIQMAC; 449 /* 450 * Enable various functionality by default if we're 451 * capable; the driver can override us if it knows better. 452 */ 453 if (vap->iv_caps & IEEE80211_C_WME) 454 vap->iv_flags |= IEEE80211_F_WME; 455 if (vap->iv_caps & IEEE80211_C_BURST) 456 vap->iv_flags |= IEEE80211_F_BURST; 457 #if 0 458 /* 459 * NB: bg scanning only makes sense for station mode right now 460 * 461 * XXX: bgscan is not necessarily stable, so do not enable it by 462 * default. It messes up atheros drivers for sure. 463 * (tested w/ AR9280). 464 */ 465 if (vap->iv_opmode == IEEE80211_M_STA && 466 (vap->iv_caps & IEEE80211_C_BGSCAN)) 467 vap->iv_flags |= IEEE80211_F_BGSCAN; 468 #endif 469 vap->iv_flags |= IEEE80211_F_DOTH; /* XXX no cap, just ena */ 470 /* NB: DFS support only makes sense for ap mode right now */ 471 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 472 (vap->iv_caps & IEEE80211_C_DFS)) 473 vap->iv_flags_ext |= IEEE80211_FEXT_DFS; 474 475 vap->iv_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */ 476 vap->iv_bmissthreshold = IEEE80211_HWBMISS_DEFAULT; 477 vap->iv_dtim_period = IEEE80211_DTIM_DEFAULT; 478 /* 479 * Install a default reset method for the ioctl support; 480 * the driver can override this. 481 */ 482 vap->iv_reset = default_reset; 483 484 IEEE80211_ADDR_COPY(vap->iv_myaddr, macaddr); 485 486 ieee80211_sysctl_vattach(vap); 487 ieee80211_crypto_vattach(vap); 488 ieee80211_node_vattach(vap); 489 ieee80211_power_vattach(vap); 490 ieee80211_proto_vattach(vap); 491 #ifdef IEEE80211_SUPPORT_SUPERG 492 ieee80211_superg_vattach(vap); 493 #endif 494 ieee80211_ht_vattach(vap); 495 ieee80211_scan_vattach(vap); 496 ieee80211_regdomain_vattach(vap); 497 ieee80211_radiotap_vattach(vap); 498 ieee80211_ratectl_set(vap, IEEE80211_RATECTL_AMRR); 499 500 return 0; 501 } 502 503 /* 504 * Activate a vap. State should have been prepared with a 505 * call to ieee80211_vap_setup and by the driver. On return 506 * from this call the vap is ready for use. 507 */ 508 int 509 ieee80211_vap_attach(struct ieee80211vap *vap, 510 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) 511 { 512 struct ifnet *ifp = vap->iv_ifp; 513 struct ieee80211com *ic = vap->iv_ic; 514 struct ifmediareq imr; 515 int maxrate; 516 517 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 518 "%s: %s parent %s flags 0x%x flags_ext 0x%x\n", 519 __func__, ieee80211_opmode_name[vap->iv_opmode], 520 ic->ic_ifp->if_xname, vap->iv_flags, vap->iv_flags_ext); 521 522 /* 523 * Do late attach work that cannot happen until after 524 * the driver has had a chance to override defaults. 525 */ 526 ieee80211_node_latevattach(vap); 527 ieee80211_power_latevattach(vap); 528 529 maxrate = ieee80211_media_setup(ic, &vap->iv_media, vap->iv_caps, 530 vap->iv_opmode == IEEE80211_M_STA, media_change, media_stat); 531 ieee80211_media_status(ifp, &imr); 532 /* NB: strip explicit mode; we're actually in autoselect */ 533 ifmedia_set(&vap->iv_media, 534 imr.ifm_active &~ (IFM_MMASK | IFM_IEEE80211_TURBO)); 535 if (maxrate) 536 ifp->if_baudrate = IF_Mbps(maxrate); 537 538 ether_ifattach(ifp, vap->iv_myaddr, &wlan_global_serializer); 539 if (vap->iv_opmode == IEEE80211_M_MONITOR) { 540 /* NB: disallow transmit */ 541 #ifdef __FreeBSD__ 542 ifp->if_transmit = null_transmit; 543 #endif 544 ifp->if_output = null_output; 545 } else { 546 /* hook output method setup by ether_ifattach */ 547 vap->iv_output = ifp->if_output; 548 ifp->if_output = ieee80211_output; 549 } 550 /* NB: if_mtu set by ether_ifattach to ETHERMTU */ 551 552 TAILQ_INSERT_TAIL(&ic->ic_vaps, vap, iv_next); 553 ieee80211_syncflag_locked(ic, IEEE80211_F_WME); 554 #ifdef IEEE80211_SUPPORT_SUPERG 555 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); 556 #endif 557 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); 558 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); 559 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT); 560 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40); 561 ieee80211_syncifflag_locked(ic, IFF_PROMISC); 562 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI); 563 564 return 1; 565 } 566 567 /* 568 * Tear down vap state and reclaim the ifnet. 569 * The driver is assumed to have prepared for 570 * this; e.g. by turning off interrupts for the 571 * underlying device. 572 */ 573 void 574 ieee80211_vap_detach(struct ieee80211vap *vap) 575 { 576 struct ieee80211com *ic = vap->iv_ic; 577 struct ifnet *ifp = vap->iv_ifp; 578 579 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s parent %s\n", 580 __func__, ieee80211_opmode_name[vap->iv_opmode], 581 ic->ic_ifp->if_xname); 582 583 /* 584 * NB: bpfdetach is called by ether_ifdetach and claims all taps 585 * 586 * ether_ifdetach() must be called without the serializer held. 587 */ 588 wlan_assert_serialized(); 589 wlan_serialize_exit(); /* exit to block */ 590 ether_ifdetach(ifp); 591 592 wlan_serialize_enter(); /* then reenter */ 593 ieee80211_stop(vap); 594 595 /* 596 * Flush any deferred vap tasks. 597 */ 598 wlan_serialize_exit(); /* exit to block */ 599 ieee80211_draintask(ic, &vap->iv_nstate_task); 600 ieee80211_draintask(ic, &vap->iv_swbmiss_task); 601 wlan_serialize_enter(); /* then reenter */ 602 603 #ifdef __FreeBSD__ 604 /* XXX band-aid until ifnet handles this for us */ 605 taskqueue_drain(taskqueue_swi, &ifp->if_linktask); 606 #endif 607 608 KASSERT(vap->iv_state == IEEE80211_S_INIT , ("vap still running")); 609 TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next); 610 ieee80211_syncflag_locked(ic, IEEE80211_F_WME); 611 #ifdef IEEE80211_SUPPORT_SUPERG 612 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); 613 #endif 614 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); 615 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); 616 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT); 617 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40); 618 /* NB: this handles the bpfdetach done below */ 619 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_BPF); 620 ieee80211_syncifflag_locked(ic, IFF_PROMISC); 621 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI); 622 623 ifmedia_removeall(&vap->iv_media); 624 625 ieee80211_radiotap_vdetach(vap); 626 ieee80211_regdomain_vdetach(vap); 627 ieee80211_scan_vdetach(vap); 628 #ifdef IEEE80211_SUPPORT_SUPERG 629 ieee80211_superg_vdetach(vap); 630 #endif 631 ieee80211_ht_vdetach(vap); 632 /* NB: must be before ieee80211_node_vdetach */ 633 ieee80211_proto_vdetach(vap); 634 ieee80211_crypto_vdetach(vap); 635 ieee80211_power_vdetach(vap); 636 ieee80211_node_vdetach(vap); 637 ieee80211_sysctl_vdetach(vap); 638 639 if_free(ifp); 640 } 641 642 /* 643 * Synchronize flag bit state in the parent ifnet structure 644 * according to the state of all vap ifnet's. This is used, 645 * for example, to handle IFF_PROMISC and IFF_ALLMULTI. 646 */ 647 void 648 ieee80211_syncifflag_locked(struct ieee80211com *ic, int flag) 649 { 650 struct ifnet *ifp = ic->ic_ifp; 651 struct ieee80211vap *vap; 652 int bit, oflags; 653 654 bit = 0; 655 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 656 if (vap->iv_ifp->if_flags & flag) { 657 /* 658 * XXX the bridge sets PROMISC but we don't want to 659 * enable it on the device, discard here so all the 660 * drivers don't need to special-case it 661 */ 662 if (flag == IFF_PROMISC && 663 !(vap->iv_opmode == IEEE80211_M_MONITOR || 664 (vap->iv_opmode == IEEE80211_M_AHDEMO && 665 (vap->iv_caps & IEEE80211_C_TDMA) == 0))) 666 continue; 667 bit = 1; 668 break; 669 } 670 oflags = ifp->if_flags; 671 if (bit) 672 ifp->if_flags |= flag; 673 else 674 ifp->if_flags &= ~flag; 675 if ((ifp->if_flags ^ oflags) & flag) { 676 /* XXX should we return 1/0 and let caller do this? */ 677 if (ifp->if_flags & IFF_RUNNING) { 678 if (flag == IFF_PROMISC) 679 ieee80211_runtask(ic, &ic->ic_promisc_task); 680 else if (flag == IFF_ALLMULTI) 681 ieee80211_runtask(ic, &ic->ic_mcast_task); 682 } 683 } 684 } 685 686 /* 687 * Synchronize flag bit state in the com structure 688 * according to the state of all vap's. This is used, 689 * for example, to handle state changes via ioctls. 690 */ 691 static void 692 ieee80211_syncflag_locked(struct ieee80211com *ic, int flag) 693 { 694 struct ieee80211vap *vap; 695 int bit; 696 697 bit = 0; 698 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 699 if (vap->iv_flags & flag) { 700 bit = 1; 701 break; 702 } 703 if (bit) 704 ic->ic_flags |= flag; 705 else 706 ic->ic_flags &= ~flag; 707 } 708 709 void 710 ieee80211_syncflag(struct ieee80211vap *vap, int flag) 711 { 712 struct ieee80211com *ic = vap->iv_ic; 713 714 if (flag < 0) { 715 flag = -flag; 716 vap->iv_flags &= ~flag; 717 } else 718 vap->iv_flags |= flag; 719 ieee80211_syncflag_locked(ic, flag); 720 } 721 722 /* 723 * Synchronize flags_ht bit state in the com structure 724 * according to the state of all vap's. This is used, 725 * for example, to handle state changes via ioctls. 726 */ 727 static void 728 ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag) 729 { 730 struct ieee80211vap *vap; 731 int bit; 732 733 bit = 0; 734 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 735 if (vap->iv_flags_ht & flag) { 736 bit = 1; 737 break; 738 } 739 if (bit) 740 ic->ic_flags_ht |= flag; 741 else 742 ic->ic_flags_ht &= ~flag; 743 } 744 745 void 746 ieee80211_syncflag_ht(struct ieee80211vap *vap, int flag) 747 { 748 struct ieee80211com *ic = vap->iv_ic; 749 750 if (flag < 0) { 751 flag = -flag; 752 vap->iv_flags_ht &= ~flag; 753 } else 754 vap->iv_flags_ht |= flag; 755 ieee80211_syncflag_ht_locked(ic, flag); 756 } 757 758 /* 759 * Synchronize flags_ext bit state in the com structure 760 * according to the state of all vap's. This is used, 761 * for example, to handle state changes via ioctls. 762 */ 763 static void 764 ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag) 765 { 766 struct ieee80211vap *vap; 767 int bit; 768 769 bit = 0; 770 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 771 if (vap->iv_flags_ext & flag) { 772 bit = 1; 773 break; 774 } 775 if (bit) 776 ic->ic_flags_ext |= flag; 777 else 778 ic->ic_flags_ext &= ~flag; 779 } 780 781 void 782 ieee80211_syncflag_ext(struct ieee80211vap *vap, int flag) 783 { 784 struct ieee80211com *ic = vap->iv_ic; 785 786 if (flag < 0) { 787 flag = -flag; 788 vap->iv_flags_ext &= ~flag; 789 } else 790 vap->iv_flags_ext |= flag; 791 ieee80211_syncflag_ext_locked(ic, flag); 792 } 793 794 static __inline int 795 mapgsm(u_int freq, u_int flags) 796 { 797 freq *= 10; 798 if (flags & IEEE80211_CHAN_QUARTER) 799 freq += 5; 800 else if (flags & IEEE80211_CHAN_HALF) 801 freq += 10; 802 else 803 freq += 20; 804 /* NB: there is no 907/20 wide but leave room */ 805 return (freq - 906*10) / 5; 806 } 807 808 static __inline int 809 mappsb(u_int freq, u_int flags) 810 { 811 return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5; 812 } 813 814 /* 815 * Convert MHz frequency to IEEE channel number. 816 */ 817 int 818 ieee80211_mhz2ieee(u_int freq, u_int flags) 819 { 820 #define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990) 821 if (flags & IEEE80211_CHAN_GSM) 822 return mapgsm(freq, flags); 823 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 824 if (freq == 2484) 825 return 14; 826 if (freq < 2484) 827 return ((int) freq - 2407) / 5; 828 else 829 return 15 + ((freq - 2512) / 20); 830 } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */ 831 if (freq <= 5000) { 832 /* XXX check regdomain? */ 833 if (IS_FREQ_IN_PSB(freq)) 834 return mappsb(freq, flags); 835 return (freq - 4000) / 5; 836 } else 837 return (freq - 5000) / 5; 838 } else { /* either, guess */ 839 if (freq == 2484) 840 return 14; 841 if (freq < 2484) { 842 if (907 <= freq && freq <= 922) 843 return mapgsm(freq, flags); 844 return ((int) freq - 2407) / 5; 845 } 846 if (freq < 5000) { 847 if (IS_FREQ_IN_PSB(freq)) 848 return mappsb(freq, flags); 849 else if (freq > 4900) 850 return (freq - 4000) / 5; 851 else 852 return 15 + ((freq - 2512) / 20); 853 } 854 return (freq - 5000) / 5; 855 } 856 #undef IS_FREQ_IN_PSB 857 } 858 859 /* 860 * Convert channel to IEEE channel number. 861 */ 862 int 863 ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c) 864 { 865 if (c == NULL) { 866 if_printf(ic->ic_ifp, "invalid channel (NULL)\n"); 867 return 0; /* XXX */ 868 } 869 return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee); 870 } 871 872 /* 873 * Convert IEEE channel number to MHz frequency. 874 */ 875 u_int 876 ieee80211_ieee2mhz(u_int chan, u_int flags) 877 { 878 if (flags & IEEE80211_CHAN_GSM) 879 return 907 + 5 * (chan / 10); 880 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 881 if (chan == 14) 882 return 2484; 883 if (chan < 14) 884 return 2407 + chan*5; 885 else 886 return 2512 + ((chan-15)*20); 887 } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */ 888 if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) { 889 chan -= 37; 890 return 4940 + chan*5 + (chan % 5 ? 2 : 0); 891 } 892 return 5000 + (chan*5); 893 } else { /* either, guess */ 894 /* XXX can't distinguish PSB+GSM channels */ 895 if (chan == 14) 896 return 2484; 897 if (chan < 14) /* 0-13 */ 898 return 2407 + chan*5; 899 if (chan < 27) /* 15-26 */ 900 return 2512 + ((chan-15)*20); 901 return 5000 + (chan*5); 902 } 903 } 904 905 /* 906 * Locate a channel given a frequency+flags. We cache 907 * the previous lookup to optimize switching between two 908 * channels--as happens with dynamic turbo. 909 */ 910 struct ieee80211_channel * 911 ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags) 912 { 913 struct ieee80211_channel *c; 914 int i; 915 916 flags &= IEEE80211_CHAN_ALLTURBO; 917 c = ic->ic_prevchan; 918 if (c != NULL && c->ic_freq == freq && 919 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 920 return c; 921 /* brute force search */ 922 for (i = 0; i < ic->ic_nchans; i++) { 923 c = &ic->ic_channels[i]; 924 if (c->ic_freq == freq && 925 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 926 return c; 927 } 928 return NULL; 929 } 930 931 /* 932 * Locate a channel given a channel number+flags. We cache 933 * the previous lookup to optimize switching between two 934 * channels--as happens with dynamic turbo. 935 */ 936 struct ieee80211_channel * 937 ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags) 938 { 939 struct ieee80211_channel *c; 940 int i; 941 942 flags &= IEEE80211_CHAN_ALLTURBO; 943 c = ic->ic_prevchan; 944 if (c != NULL && c->ic_ieee == ieee && 945 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 946 return c; 947 /* brute force search */ 948 for (i = 0; i < ic->ic_nchans; i++) { 949 c = &ic->ic_channels[i]; 950 if (c->ic_ieee == ieee && 951 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 952 return c; 953 } 954 return NULL; 955 } 956 957 static void 958 addmedia(struct ifmedia *media, int caps, int addsta, int mode, int mword) 959 { 960 #define ADD(_ic, _s, _o) \ 961 ifmedia_add(media, \ 962 IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL) 963 static const u_int mopts[IEEE80211_MODE_MAX] = { 964 [IEEE80211_MODE_AUTO] = IFM_AUTO, 965 [IEEE80211_MODE_11A] = IFM_IEEE80211_11A, 966 [IEEE80211_MODE_11B] = IFM_IEEE80211_11B, 967 [IEEE80211_MODE_11G] = IFM_IEEE80211_11G, 968 [IEEE80211_MODE_FH] = IFM_IEEE80211_FH, 969 [IEEE80211_MODE_TURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO, 970 [IEEE80211_MODE_TURBO_G] = IFM_IEEE80211_11G|IFM_IEEE80211_TURBO, 971 [IEEE80211_MODE_STURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO, 972 [IEEE80211_MODE_HALF] = IFM_IEEE80211_11A, /* XXX */ 973 [IEEE80211_MODE_QUARTER] = IFM_IEEE80211_11A, /* XXX */ 974 [IEEE80211_MODE_11NA] = IFM_IEEE80211_11NA, 975 [IEEE80211_MODE_11NG] = IFM_IEEE80211_11NG, 976 }; 977 u_int mopt; 978 979 mopt = mopts[mode]; 980 if (addsta) 981 ADD(ic, mword, mopt); /* STA mode has no cap */ 982 if (caps & IEEE80211_C_IBSS) 983 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC); 984 if (caps & IEEE80211_C_HOSTAP) 985 ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP); 986 if (caps & IEEE80211_C_AHDEMO) 987 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0); 988 if (caps & IEEE80211_C_MONITOR) 989 ADD(media, mword, mopt | IFM_IEEE80211_MONITOR); 990 if (caps & IEEE80211_C_WDS) 991 ADD(media, mword, mopt | IFM_IEEE80211_WDS); 992 if (caps & IEEE80211_C_MBSS) 993 ADD(media, mword, mopt | IFM_IEEE80211_MBSS); 994 #undef ADD 995 } 996 997 /* 998 * Setup the media data structures according to the channel and 999 * rate tables. 1000 */ 1001 static int 1002 ieee80211_media_setup(struct ieee80211com *ic, 1003 struct ifmedia *media, int caps, int addsta, 1004 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) 1005 { 1006 int i, j, mode, rate, maxrate, mword, r; 1007 const struct ieee80211_rateset *rs; 1008 struct ieee80211_rateset allrates; 1009 1010 /* 1011 * Fill in media characteristics. 1012 */ 1013 ifmedia_init(media, 0, media_change, media_stat); 1014 maxrate = 0; 1015 /* 1016 * Add media for legacy operating modes. 1017 */ 1018 memset(&allrates, 0, sizeof(allrates)); 1019 for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) { 1020 if (isclr(ic->ic_modecaps, mode)) 1021 continue; 1022 addmedia(media, caps, addsta, mode, IFM_AUTO); 1023 if (mode == IEEE80211_MODE_AUTO) 1024 continue; 1025 rs = &ic->ic_sup_rates[mode]; 1026 for (i = 0; i < rs->rs_nrates; i++) { 1027 rate = rs->rs_rates[i]; 1028 mword = ieee80211_rate2media(ic, rate, mode); 1029 if (mword == 0) 1030 continue; 1031 addmedia(media, caps, addsta, mode, mword); 1032 /* 1033 * Add legacy rate to the collection of all rates. 1034 */ 1035 r = rate & IEEE80211_RATE_VAL; 1036 for (j = 0; j < allrates.rs_nrates; j++) 1037 if (allrates.rs_rates[j] == r) 1038 break; 1039 if (j == allrates.rs_nrates) { 1040 /* unique, add to the set */ 1041 allrates.rs_rates[j] = r; 1042 allrates.rs_nrates++; 1043 } 1044 rate = (rate & IEEE80211_RATE_VAL) / 2; 1045 if (rate > maxrate) 1046 maxrate = rate; 1047 } 1048 } 1049 for (i = 0; i < allrates.rs_nrates; i++) { 1050 mword = ieee80211_rate2media(ic, allrates.rs_rates[i], 1051 IEEE80211_MODE_AUTO); 1052 if (mword == 0) 1053 continue; 1054 /* NB: remove media options from mword */ 1055 addmedia(media, caps, addsta, 1056 IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword)); 1057 } 1058 /* 1059 * Add HT/11n media. Note that we do not have enough 1060 * bits in the media subtype to express the MCS so we 1061 * use a "placeholder" media subtype and any fixed MCS 1062 * must be specified with a different mechanism. 1063 */ 1064 for (; mode <= IEEE80211_MODE_11NG; mode++) { 1065 if (isclr(ic->ic_modecaps, mode)) 1066 continue; 1067 addmedia(media, caps, addsta, mode, IFM_AUTO); 1068 addmedia(media, caps, addsta, mode, IFM_IEEE80211_MCS); 1069 } 1070 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) || 1071 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) { 1072 addmedia(media, caps, addsta, 1073 IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS); 1074 /* XXX could walk htrates */ 1075 /* XXX known array size */ 1076 if (ieee80211_htrates[15].ht40_rate_400ns > maxrate) 1077 maxrate = ieee80211_htrates[15].ht40_rate_400ns; 1078 } 1079 return maxrate; 1080 } 1081 1082 void 1083 ieee80211_media_init(struct ieee80211com *ic) 1084 { 1085 struct ifnet *ifp = ic->ic_ifp; 1086 int maxrate; 1087 1088 /* NB: this works because the structure is initialized to zero */ 1089 if (!LIST_EMPTY(&ic->ic_media.ifm_list)) { 1090 /* 1091 * We are re-initializing the channel list; clear 1092 * the existing media state as the media routines 1093 * don't suppress duplicates. 1094 */ 1095 ifmedia_removeall(&ic->ic_media); 1096 } 1097 ieee80211_chan_init(ic); 1098 1099 /* 1100 * Recalculate media settings in case new channel list changes 1101 * the set of available modes. 1102 */ 1103 maxrate = ieee80211_media_setup(ic, &ic->ic_media, ic->ic_caps, 1, 1104 ieee80211com_media_change, ieee80211com_media_status); 1105 /* NB: strip explicit mode; we're actually in autoselect */ 1106 ifmedia_set(&ic->ic_media, 1107 media_status(ic->ic_opmode, ic->ic_curchan) &~ 1108 (IFM_MMASK | IFM_IEEE80211_TURBO)); 1109 if (maxrate) 1110 ifp->if_baudrate = IF_Mbps(maxrate); 1111 1112 /* XXX need to propagate new media settings to vap's */ 1113 } 1114 1115 /* XXX inline or eliminate? */ 1116 const struct ieee80211_rateset * 1117 ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c) 1118 { 1119 /* XXX does this work for 11ng basic rates? */ 1120 return &ic->ic_sup_rates[ieee80211_chan2mode(c)]; 1121 } 1122 1123 void 1124 ieee80211_announce(struct ieee80211com *ic) 1125 { 1126 struct ifnet *ifp = ic->ic_ifp; 1127 int i, mode, rate, mword; 1128 const struct ieee80211_rateset *rs; 1129 1130 /* NB: skip AUTO since it has no rates */ 1131 for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) { 1132 if (isclr(ic->ic_modecaps, mode)) 1133 continue; 1134 if_printf(ifp, "%s rates: ", ieee80211_phymode_name[mode]); 1135 rs = &ic->ic_sup_rates[mode]; 1136 for (i = 0; i < rs->rs_nrates; i++) { 1137 mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode); 1138 if (mword == 0) 1139 continue; 1140 rate = ieee80211_media2rate(mword); 1141 kprintf("%s%d%sMbps", (i != 0 ? " " : ""), 1142 rate / 2, ((rate & 0x1) != 0 ? ".5" : "")); 1143 } 1144 kprintf("\n"); 1145 } 1146 ieee80211_ht_announce(ic); 1147 } 1148 1149 void 1150 ieee80211_announce_channels(struct ieee80211com *ic) 1151 { 1152 const struct ieee80211_channel *c; 1153 char type; 1154 int i, cw; 1155 1156 kprintf("Chan Freq CW RegPwr MinPwr MaxPwr\n"); 1157 for (i = 0; i < ic->ic_nchans; i++) { 1158 c = &ic->ic_channels[i]; 1159 if (IEEE80211_IS_CHAN_ST(c)) 1160 type = 'S'; 1161 else if (IEEE80211_IS_CHAN_108A(c)) 1162 type = 'T'; 1163 else if (IEEE80211_IS_CHAN_108G(c)) 1164 type = 'G'; 1165 else if (IEEE80211_IS_CHAN_HT(c)) 1166 type = 'n'; 1167 else if (IEEE80211_IS_CHAN_A(c)) 1168 type = 'a'; 1169 else if (IEEE80211_IS_CHAN_ANYG(c)) 1170 type = 'g'; 1171 else if (IEEE80211_IS_CHAN_B(c)) 1172 type = 'b'; 1173 else 1174 type = 'f'; 1175 if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c)) 1176 cw = 40; 1177 else if (IEEE80211_IS_CHAN_HALF(c)) 1178 cw = 10; 1179 else if (IEEE80211_IS_CHAN_QUARTER(c)) 1180 cw = 5; 1181 else 1182 cw = 20; 1183 kprintf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n" 1184 , c->ic_ieee, c->ic_freq, type 1185 , cw 1186 , IEEE80211_IS_CHAN_HT40U(c) ? '+' : 1187 IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' ' 1188 , c->ic_maxregpower 1189 , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0 1190 , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0 1191 ); 1192 } 1193 } 1194 1195 static int 1196 media2mode(const struct ifmedia_entry *ime, uint32_t flags, uint16_t *mode) 1197 { 1198 switch (IFM_MODE(ime->ifm_media)) { 1199 case IFM_IEEE80211_11A: 1200 *mode = IEEE80211_MODE_11A; 1201 break; 1202 case IFM_IEEE80211_11B: 1203 *mode = IEEE80211_MODE_11B; 1204 break; 1205 case IFM_IEEE80211_11G: 1206 *mode = IEEE80211_MODE_11G; 1207 break; 1208 case IFM_IEEE80211_FH: 1209 *mode = IEEE80211_MODE_FH; 1210 break; 1211 case IFM_IEEE80211_11NA: 1212 *mode = IEEE80211_MODE_11NA; 1213 break; 1214 case IFM_IEEE80211_11NG: 1215 *mode = IEEE80211_MODE_11NG; 1216 break; 1217 case IFM_AUTO: 1218 *mode = IEEE80211_MODE_AUTO; 1219 break; 1220 default: 1221 return 0; 1222 } 1223 /* 1224 * Turbo mode is an ``option''. 1225 * XXX does not apply to AUTO 1226 */ 1227 if (ime->ifm_media & IFM_IEEE80211_TURBO) { 1228 if (*mode == IEEE80211_MODE_11A) { 1229 if (flags & IEEE80211_F_TURBOP) 1230 *mode = IEEE80211_MODE_TURBO_A; 1231 else 1232 *mode = IEEE80211_MODE_STURBO_A; 1233 } else if (*mode == IEEE80211_MODE_11G) 1234 *mode = IEEE80211_MODE_TURBO_G; 1235 else 1236 return 0; 1237 } 1238 /* XXX HT40 +/- */ 1239 return 1; 1240 } 1241 1242 /* 1243 * Handle a media change request on the underlying interface. 1244 */ 1245 int 1246 ieee80211com_media_change(struct ifnet *ifp) 1247 { 1248 return EINVAL; 1249 } 1250 1251 /* 1252 * Handle a media change request on the vap interface. 1253 */ 1254 int 1255 ieee80211_media_change(struct ifnet *ifp) 1256 { 1257 struct ieee80211vap *vap = ifp->if_softc; 1258 struct ifmedia_entry *ime = vap->iv_media.ifm_cur; 1259 uint16_t newmode; 1260 1261 if (!media2mode(ime, vap->iv_flags, &newmode)) 1262 return EINVAL; 1263 if (vap->iv_des_mode != newmode) { 1264 vap->iv_des_mode = newmode; 1265 /* XXX kick state machine if up+running */ 1266 } 1267 return 0; 1268 } 1269 1270 /* 1271 * Common code to calculate the media status word 1272 * from the operating mode and channel state. 1273 */ 1274 static int 1275 media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan) 1276 { 1277 int status; 1278 1279 status = IFM_IEEE80211; 1280 switch (opmode) { 1281 case IEEE80211_M_STA: 1282 break; 1283 case IEEE80211_M_IBSS: 1284 status |= IFM_IEEE80211_ADHOC; 1285 break; 1286 case IEEE80211_M_HOSTAP: 1287 status |= IFM_IEEE80211_HOSTAP; 1288 break; 1289 case IEEE80211_M_MONITOR: 1290 status |= IFM_IEEE80211_MONITOR; 1291 break; 1292 case IEEE80211_M_AHDEMO: 1293 status |= IFM_IEEE80211_ADHOC | IFM_FLAG0; 1294 break; 1295 case IEEE80211_M_WDS: 1296 status |= IFM_IEEE80211_WDS; 1297 break; 1298 case IEEE80211_M_MBSS: 1299 status |= IFM_IEEE80211_MBSS; 1300 break; 1301 } 1302 if (IEEE80211_IS_CHAN_HTA(chan)) { 1303 status |= IFM_IEEE80211_11NA; 1304 } else if (IEEE80211_IS_CHAN_HTG(chan)) { 1305 status |= IFM_IEEE80211_11NG; 1306 } else if (IEEE80211_IS_CHAN_A(chan)) { 1307 status |= IFM_IEEE80211_11A; 1308 } else if (IEEE80211_IS_CHAN_B(chan)) { 1309 status |= IFM_IEEE80211_11B; 1310 } else if (IEEE80211_IS_CHAN_ANYG(chan)) { 1311 status |= IFM_IEEE80211_11G; 1312 } else if (IEEE80211_IS_CHAN_FHSS(chan)) { 1313 status |= IFM_IEEE80211_FH; 1314 } 1315 /* XXX else complain? */ 1316 1317 if (IEEE80211_IS_CHAN_TURBO(chan)) 1318 status |= IFM_IEEE80211_TURBO; 1319 #if 0 1320 if (IEEE80211_IS_CHAN_HT20(chan)) 1321 status |= IFM_IEEE80211_HT20; 1322 if (IEEE80211_IS_CHAN_HT40(chan)) 1323 status |= IFM_IEEE80211_HT40; 1324 #endif 1325 return status; 1326 } 1327 1328 static void 1329 ieee80211com_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1330 { 1331 struct ieee80211com *ic = ifp->if_l2com; 1332 struct ieee80211vap *vap; 1333 1334 imr->ifm_status = IFM_AVALID; 1335 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1336 if (vap->iv_ifp->if_flags & IFF_UP) { 1337 imr->ifm_status |= IFM_ACTIVE; 1338 break; 1339 } 1340 imr->ifm_active = media_status(ic->ic_opmode, ic->ic_curchan); 1341 if (imr->ifm_status & IFM_ACTIVE) 1342 imr->ifm_current = imr->ifm_active; 1343 } 1344 1345 void 1346 ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1347 { 1348 struct ieee80211vap *vap = ifp->if_softc; 1349 struct ieee80211com *ic = vap->iv_ic; 1350 enum ieee80211_phymode mode; 1351 1352 imr->ifm_status = IFM_AVALID; 1353 /* 1354 * NB: use the current channel's mode to lock down a xmit 1355 * rate only when running; otherwise we may have a mismatch 1356 * in which case the rate will not be convertible. 1357 */ 1358 if (vap->iv_state == IEEE80211_S_RUN) { 1359 imr->ifm_status |= IFM_ACTIVE; 1360 mode = ieee80211_chan2mode(ic->ic_curchan); 1361 } else 1362 mode = IEEE80211_MODE_AUTO; 1363 imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan); 1364 /* 1365 * Calculate a current rate if possible. 1366 */ 1367 if (vap->iv_txparms[mode].ucastrate != IEEE80211_FIXED_RATE_NONE) { 1368 /* 1369 * A fixed rate is set, report that. 1370 */ 1371 imr->ifm_active |= ieee80211_rate2media(ic, 1372 vap->iv_txparms[mode].ucastrate, mode); 1373 } else if (vap->iv_opmode == IEEE80211_M_STA) { 1374 /* 1375 * In station mode report the current transmit rate. 1376 */ 1377 imr->ifm_active |= ieee80211_rate2media(ic, 1378 vap->iv_bss->ni_txrate, mode); 1379 } else 1380 imr->ifm_active |= IFM_AUTO; 1381 if (imr->ifm_status & IFM_ACTIVE) 1382 imr->ifm_current = imr->ifm_active; 1383 } 1384 1385 /* 1386 * Set the current phy mode and recalculate the active channel 1387 * set based on the available channels for this mode. Also 1388 * select a new default/current channel if the current one is 1389 * inappropriate for this mode. 1390 */ 1391 int 1392 ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode) 1393 { 1394 /* 1395 * Adjust basic rates in 11b/11g supported rate set. 1396 * Note that if operating on a hal/quarter rate channel 1397 * this is a noop as those rates sets are different 1398 * and used instead. 1399 */ 1400 if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B) 1401 ieee80211_setbasicrates(&ic->ic_sup_rates[mode], mode); 1402 1403 ic->ic_curmode = mode; 1404 ieee80211_reset_erp(ic); /* reset ERP state */ 1405 1406 return 0; 1407 } 1408 1409 /* 1410 * Return the phy mode for with the specified channel. 1411 */ 1412 enum ieee80211_phymode 1413 ieee80211_chan2mode(const struct ieee80211_channel *chan) 1414 { 1415 1416 if (IEEE80211_IS_CHAN_HTA(chan)) 1417 return IEEE80211_MODE_11NA; 1418 else if (IEEE80211_IS_CHAN_HTG(chan)) 1419 return IEEE80211_MODE_11NG; 1420 else if (IEEE80211_IS_CHAN_108G(chan)) 1421 return IEEE80211_MODE_TURBO_G; 1422 else if (IEEE80211_IS_CHAN_ST(chan)) 1423 return IEEE80211_MODE_STURBO_A; 1424 else if (IEEE80211_IS_CHAN_TURBO(chan)) 1425 return IEEE80211_MODE_TURBO_A; 1426 else if (IEEE80211_IS_CHAN_HALF(chan)) 1427 return IEEE80211_MODE_HALF; 1428 else if (IEEE80211_IS_CHAN_QUARTER(chan)) 1429 return IEEE80211_MODE_QUARTER; 1430 else if (IEEE80211_IS_CHAN_A(chan)) 1431 return IEEE80211_MODE_11A; 1432 else if (IEEE80211_IS_CHAN_ANYG(chan)) 1433 return IEEE80211_MODE_11G; 1434 else if (IEEE80211_IS_CHAN_B(chan)) 1435 return IEEE80211_MODE_11B; 1436 else if (IEEE80211_IS_CHAN_FHSS(chan)) 1437 return IEEE80211_MODE_FH; 1438 1439 /* NB: should not get here */ 1440 kprintf("%s: cannot map channel to mode; freq %u flags 0x%x\n", 1441 __func__, chan->ic_freq, chan->ic_flags); 1442 return IEEE80211_MODE_11B; 1443 } 1444 1445 struct ratemedia { 1446 u_int match; /* rate + mode */ 1447 u_int media; /* if_media rate */ 1448 }; 1449 1450 static int 1451 findmedia(const struct ratemedia rates[], int n, u_int match) 1452 { 1453 int i; 1454 1455 for (i = 0; i < n; i++) 1456 if (rates[i].match == match) 1457 return rates[i].media; 1458 return IFM_AUTO; 1459 } 1460 1461 /* 1462 * Convert IEEE80211 rate value to ifmedia subtype. 1463 * Rate is either a legacy rate in units of 0.5Mbps 1464 * or an MCS index. 1465 */ 1466 int 1467 ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode) 1468 { 1469 static const struct ratemedia rates[] = { 1470 { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 }, 1471 { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 }, 1472 { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 }, 1473 { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 }, 1474 { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 }, 1475 { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 }, 1476 { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 }, 1477 { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 }, 1478 { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 }, 1479 { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 }, 1480 { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 }, 1481 { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 }, 1482 { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 }, 1483 { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 }, 1484 { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 }, 1485 { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 }, 1486 { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 }, 1487 { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 }, 1488 { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 }, 1489 { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 }, 1490 { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 }, 1491 { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 }, 1492 { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 }, 1493 { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 }, 1494 { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 }, 1495 { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 }, 1496 { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 }, 1497 { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 }, 1498 { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 }, 1499 { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 }, 1500 /* NB: OFDM72 doesn't realy exist so we don't handle it */ 1501 }; 1502 static const struct ratemedia htrates[] = { 1503 { 0, IFM_IEEE80211_MCS }, 1504 { 1, IFM_IEEE80211_MCS }, 1505 { 2, IFM_IEEE80211_MCS }, 1506 { 3, IFM_IEEE80211_MCS }, 1507 { 4, IFM_IEEE80211_MCS }, 1508 { 5, IFM_IEEE80211_MCS }, 1509 { 6, IFM_IEEE80211_MCS }, 1510 { 7, IFM_IEEE80211_MCS }, 1511 { 8, IFM_IEEE80211_MCS }, 1512 { 9, IFM_IEEE80211_MCS }, 1513 { 10, IFM_IEEE80211_MCS }, 1514 { 11, IFM_IEEE80211_MCS }, 1515 { 12, IFM_IEEE80211_MCS }, 1516 { 13, IFM_IEEE80211_MCS }, 1517 { 14, IFM_IEEE80211_MCS }, 1518 { 15, IFM_IEEE80211_MCS }, 1519 }; 1520 int m; 1521 1522 /* 1523 * Check 11n rates first for match as an MCS. 1524 */ 1525 if (mode == IEEE80211_MODE_11NA) { 1526 if (rate & IEEE80211_RATE_MCS) { 1527 rate &= ~IEEE80211_RATE_MCS; 1528 m = findmedia(htrates, NELEM(htrates), rate); 1529 if (m != IFM_AUTO) 1530 return m | IFM_IEEE80211_11NA; 1531 } 1532 } else if (mode == IEEE80211_MODE_11NG) { 1533 /* NB: 12 is ambiguous, it will be treated as an MCS */ 1534 if (rate & IEEE80211_RATE_MCS) { 1535 rate &= ~IEEE80211_RATE_MCS; 1536 m = findmedia(htrates, NELEM(htrates), rate); 1537 if (m != IFM_AUTO) 1538 return m | IFM_IEEE80211_11NG; 1539 } 1540 } 1541 rate &= IEEE80211_RATE_VAL; 1542 switch (mode) { 1543 case IEEE80211_MODE_11A: 1544 case IEEE80211_MODE_HALF: /* XXX good 'nuf */ 1545 case IEEE80211_MODE_QUARTER: 1546 case IEEE80211_MODE_11NA: 1547 case IEEE80211_MODE_TURBO_A: 1548 case IEEE80211_MODE_STURBO_A: 1549 return findmedia(rates, NELEM(rates), rate | IFM_IEEE80211_11A); 1550 case IEEE80211_MODE_11B: 1551 return findmedia(rates, NELEM(rates), rate | IFM_IEEE80211_11B); 1552 case IEEE80211_MODE_FH: 1553 return findmedia(rates, NELEM(rates), rate | IFM_IEEE80211_FH); 1554 case IEEE80211_MODE_AUTO: 1555 /* NB: ic may be NULL for some drivers */ 1556 if (ic != NULL && ic->ic_phytype == IEEE80211_T_FH) 1557 return findmedia(rates, NELEM(rates), 1558 rate | IFM_IEEE80211_FH); 1559 /* NB: hack, 11g matches both 11b+11a rates */ 1560 /* fall thru... */ 1561 case IEEE80211_MODE_11G: 1562 case IEEE80211_MODE_11NG: 1563 case IEEE80211_MODE_TURBO_G: 1564 return findmedia(rates, NELEM(rates), rate | IFM_IEEE80211_11G); 1565 } 1566 return IFM_AUTO; 1567 } 1568 1569 int 1570 ieee80211_media2rate(int mword) 1571 { 1572 static const int ieeerates[] = { 1573 -1, /* IFM_AUTO */ 1574 0, /* IFM_MANUAL */ 1575 0, /* IFM_NONE */ 1576 2, /* IFM_IEEE80211_FH1 */ 1577 4, /* IFM_IEEE80211_FH2 */ 1578 2, /* IFM_IEEE80211_DS1 */ 1579 4, /* IFM_IEEE80211_DS2 */ 1580 11, /* IFM_IEEE80211_DS5 */ 1581 22, /* IFM_IEEE80211_DS11 */ 1582 44, /* IFM_IEEE80211_DS22 */ 1583 12, /* IFM_IEEE80211_OFDM6 */ 1584 18, /* IFM_IEEE80211_OFDM9 */ 1585 24, /* IFM_IEEE80211_OFDM12 */ 1586 36, /* IFM_IEEE80211_OFDM18 */ 1587 48, /* IFM_IEEE80211_OFDM24 */ 1588 72, /* IFM_IEEE80211_OFDM36 */ 1589 96, /* IFM_IEEE80211_OFDM48 */ 1590 108, /* IFM_IEEE80211_OFDM54 */ 1591 144, /* IFM_IEEE80211_OFDM72 */ 1592 0, /* IFM_IEEE80211_DS354k */ 1593 0, /* IFM_IEEE80211_DS512k */ 1594 6, /* IFM_IEEE80211_OFDM3 */ 1595 9, /* IFM_IEEE80211_OFDM4 */ 1596 54, /* IFM_IEEE80211_OFDM27 */ 1597 -1, /* IFM_IEEE80211_MCS */ 1598 }; 1599 return IFM_SUBTYPE(mword) < NELEM(ieeerates) ? 1600 ieeerates[IFM_SUBTYPE(mword)] : 0; 1601 } 1602 1603 /* 1604 * The following hash function is adapted from "Hash Functions" by Bob Jenkins 1605 * ("Algorithm Alley", Dr. Dobbs Journal, September 1997). 1606 */ 1607 #define mix(a, b, c) \ 1608 do { \ 1609 a -= b; a -= c; a ^= (c >> 13); \ 1610 b -= c; b -= a; b ^= (a << 8); \ 1611 c -= a; c -= b; c ^= (b >> 13); \ 1612 a -= b; a -= c; a ^= (c >> 12); \ 1613 b -= c; b -= a; b ^= (a << 16); \ 1614 c -= a; c -= b; c ^= (b >> 5); \ 1615 a -= b; a -= c; a ^= (c >> 3); \ 1616 b -= c; b -= a; b ^= (a << 10); \ 1617 c -= a; c -= b; c ^= (b >> 15); \ 1618 } while (/*CONSTCOND*/0) 1619 1620 uint32_t 1621 ieee80211_mac_hash(const struct ieee80211com *ic, 1622 const uint8_t addr[IEEE80211_ADDR_LEN]) 1623 { 1624 uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = ic->ic_hash_key; 1625 1626 b += addr[5] << 8; 1627 b += addr[4]; 1628 a += addr[3] << 24; 1629 a += addr[2] << 16; 1630 a += addr[1] << 8; 1631 a += addr[0]; 1632 1633 mix(a, b, c); 1634 1635 return c; 1636 } 1637 #undef mix 1638