ieee80211.c revision 219599
1116742Ssam/*- 2116904Ssam * Copyright (c) 2001 Atsushi Onoe 3186904Ssam * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting 4116742Ssam * All rights reserved. 5116742Ssam * 6116742Ssam * Redistribution and use in source and binary forms, with or without 7116742Ssam * modification, are permitted provided that the following conditions 8116742Ssam * are met: 9116742Ssam * 1. Redistributions of source code must retain the above copyright 10116904Ssam * notice, this list of conditions and the following disclaimer. 11116904Ssam * 2. Redistributions in binary form must reproduce the above copyright 12116904Ssam * notice, this list of conditions and the following disclaimer in the 13116904Ssam * documentation and/or other materials provided with the distribution. 14116742Ssam * 15116904Ssam * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16116904Ssam * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17116904Ssam * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18116904Ssam * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19116904Ssam * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20116904Ssam * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21116904Ssam * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22116904Ssam * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23116904Ssam * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24116904Ssam * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25116742Ssam */ 26116742Ssam 27116742Ssam#include <sys/cdefs.h> 28116742Ssam__FBSDID("$FreeBSD: head/sys/net80211/ieee80211.c 219599 2011-03-13 11:47:43Z bschmidt $"); 29116742Ssam 30116742Ssam/* 31116742Ssam * IEEE 802.11 generic handler 32116742Ssam */ 33178354Ssam#include "opt_wlan.h" 34116742Ssam 35116742Ssam#include <sys/param.h> 36191746Sthompsa#include <sys/systm.h> 37116742Ssam#include <sys/kernel.h> 38182742Sbrooks 39116742Ssam#include <sys/socket.h> 40116742Ssam 41116742Ssam#include <net/if.h> 42178354Ssam#include <net/if_dl.h> 43116742Ssam#include <net/if_media.h> 44178354Ssam#include <net/if_types.h> 45116742Ssam#include <net/ethernet.h> 46116742Ssam 47116742Ssam#include <net80211/ieee80211_var.h> 48178354Ssam#include <net80211/ieee80211_regdomain.h> 49190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 50190391Ssam#include <net80211/ieee80211_superg.h> 51190391Ssam#endif 52206358Srpaulo#include <net80211/ieee80211_ratectl.h> 53116742Ssam 54116742Ssam#include <net/bpf.h> 55116742Ssam 56178955Ssamconst char *ieee80211_phymode_name[IEEE80211_MODE_MAX] = { 57178955Ssam [IEEE80211_MODE_AUTO] = "auto", 58178955Ssam [IEEE80211_MODE_11A] = "11a", 59178955Ssam [IEEE80211_MODE_11B] = "11b", 60178955Ssam [IEEE80211_MODE_11G] = "11g", 61178955Ssam [IEEE80211_MODE_FH] = "FH", 62178955Ssam [IEEE80211_MODE_TURBO_A] = "turboA", 63178955Ssam [IEEE80211_MODE_TURBO_G] = "turboG", 64178955Ssam [IEEE80211_MODE_STURBO_A] = "sturboA", 65188782Ssam [IEEE80211_MODE_HALF] = "half", 66188782Ssam [IEEE80211_MODE_QUARTER] = "quarter", 67178955Ssam [IEEE80211_MODE_11NA] = "11na", 68178955Ssam [IEEE80211_MODE_11NG] = "11ng", 69116742Ssam}; 70178957Ssam/* map ieee80211_opmode to the corresponding capability bit */ 71178957Ssamconst int ieee80211_opcap[IEEE80211_OPMODE_MAX] = { 72178957Ssam [IEEE80211_M_IBSS] = IEEE80211_C_IBSS, 73178957Ssam [IEEE80211_M_WDS] = IEEE80211_C_WDS, 74178957Ssam [IEEE80211_M_STA] = IEEE80211_C_STA, 75178957Ssam [IEEE80211_M_AHDEMO] = IEEE80211_C_AHDEMO, 76178957Ssam [IEEE80211_M_HOSTAP] = IEEE80211_C_HOSTAP, 77178957Ssam [IEEE80211_M_MONITOR] = IEEE80211_C_MONITOR, 78195618Srpaulo#ifdef IEEE80211_SUPPORT_MESH 79195618Srpaulo [IEEE80211_M_MBSS] = IEEE80211_C_MBSS, 80195618Srpaulo#endif 81178957Ssam}; 82178957Ssam 83178354Ssamstatic const uint8_t ieee80211broadcastaddr[IEEE80211_ADDR_LEN] = 84178354Ssam { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 85116742Ssam 86178354Ssamstatic void ieee80211_syncflag_locked(struct ieee80211com *ic, int flag); 87193655Ssamstatic void ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag); 88178354Ssamstatic void ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag); 89178354Ssamstatic int ieee80211_media_setup(struct ieee80211com *ic, 90178354Ssam struct ifmedia *media, int caps, int addsta, 91178354Ssam ifm_change_cb_t media_change, ifm_stat_cb_t media_stat); 92178354Ssamstatic void ieee80211com_media_status(struct ifnet *, struct ifmediareq *); 93178354Ssamstatic int ieee80211com_media_change(struct ifnet *); 94178354Ssamstatic int media_status(enum ieee80211_opmode, 95178354Ssam const struct ieee80211_channel *); 96178354Ssam 97178354SsamMALLOC_DEFINE(M_80211_VAP, "80211vap", "802.11 vap state"); 98178354Ssam 99164645Ssam/* 100164645Ssam * Default supported rates for 802.11 operation (in IEEE .5Mb units). 101164645Ssam */ 102164645Ssam#define B(r) ((r) | IEEE80211_RATE_BASIC) 103164645Ssamstatic const struct ieee80211_rateset ieee80211_rateset_11a = 104164645Ssam { 8, { B(12), 18, B(24), 36, B(48), 72, 96, 108 } }; 105165569Ssamstatic const struct ieee80211_rateset ieee80211_rateset_half = 106165569Ssam { 8, { B(6), 9, B(12), 18, B(24), 36, 48, 54 } }; 107165569Ssamstatic const struct ieee80211_rateset ieee80211_rateset_quarter = 108165569Ssam { 8, { B(3), 4, B(6), 9, B(12), 18, 24, 27 } }; 109164645Ssamstatic const struct ieee80211_rateset ieee80211_rateset_11b = 110164645Ssam { 4, { B(2), B(4), B(11), B(22) } }; 111164645Ssam/* NB: OFDM rates are handled specially based on mode */ 112164645Ssamstatic const struct ieee80211_rateset ieee80211_rateset_11g = 113164645Ssam { 12, { B(2), B(4), B(11), B(22), 12, 18, 24, 36, 48, 72, 96, 108 } }; 114164645Ssam#undef B 115164645Ssam 116140915Ssam/* 117165569Ssam * Fill in 802.11 available channel set, mark 118165569Ssam * all available channels as active, and pick 119165569Ssam * a default channel if not already specified. 120165569Ssam */ 121165569Ssamstatic void 122165569Ssamieee80211_chan_init(struct ieee80211com *ic) 123116742Ssam{ 124165569Ssam#define DEFAULTRATES(m, def) do { \ 125188782Ssam if (ic->ic_sup_rates[m].rs_nrates == 0) \ 126165574Ssam ic->ic_sup_rates[m] = def; \ 127165569Ssam} while (0) 128116742Ssam struct ieee80211_channel *c; 129116742Ssam int i; 130116742Ssam 131186107Ssam KASSERT(0 < ic->ic_nchans && ic->ic_nchans <= IEEE80211_CHAN_MAX, 132170530Ssam ("invalid number of channels specified: %u", ic->ic_nchans)); 133116742Ssam memset(ic->ic_chan_avail, 0, sizeof(ic->ic_chan_avail)); 134178354Ssam memset(ic->ic_modecaps, 0, sizeof(ic->ic_modecaps)); 135167468Ssam setbit(ic->ic_modecaps, IEEE80211_MODE_AUTO); 136170530Ssam for (i = 0; i < ic->ic_nchans; i++) { 137116742Ssam c = &ic->ic_channels[i]; 138170530Ssam KASSERT(c->ic_flags != 0, ("channel with no flags")); 139187796Ssam /* 140187796Ssam * Help drivers that work only with frequencies by filling 141187796Ssam * in IEEE channel #'s if not already calculated. Note this 142187796Ssam * mimics similar work done in ieee80211_setregdomain when 143187796Ssam * changing regulatory state. 144187796Ssam */ 145187796Ssam if (c->ic_ieee == 0) 146187796Ssam c->ic_ieee = ieee80211_mhz2ieee(c->ic_freq,c->ic_flags); 147187796Ssam if (IEEE80211_IS_CHAN_HT40(c) && c->ic_extieee == 0) 148187796Ssam c->ic_extieee = ieee80211_mhz2ieee(c->ic_freq + 149187796Ssam (IEEE80211_IS_CHAN_HT40U(c) ? 20 : -20), 150187796Ssam c->ic_flags); 151187796Ssam /* default max tx power to max regulatory */ 152187796Ssam if (c->ic_maxpower == 0) 153187796Ssam c->ic_maxpower = 2*c->ic_maxregpower; 154170530Ssam setbit(ic->ic_chan_avail, c->ic_ieee); 155170530Ssam /* 156170530Ssam * Identify mode capabilities. 157170530Ssam */ 158170530Ssam if (IEEE80211_IS_CHAN_A(c)) 159170530Ssam setbit(ic->ic_modecaps, IEEE80211_MODE_11A); 160170530Ssam if (IEEE80211_IS_CHAN_B(c)) 161170530Ssam setbit(ic->ic_modecaps, IEEE80211_MODE_11B); 162170530Ssam if (IEEE80211_IS_CHAN_ANYG(c)) 163170530Ssam setbit(ic->ic_modecaps, IEEE80211_MODE_11G); 164170530Ssam if (IEEE80211_IS_CHAN_FHSS(c)) 165170530Ssam setbit(ic->ic_modecaps, IEEE80211_MODE_FH); 166170530Ssam if (IEEE80211_IS_CHAN_108A(c)) 167170530Ssam setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_A); 168170530Ssam if (IEEE80211_IS_CHAN_108G(c)) 169170530Ssam setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_G); 170170530Ssam if (IEEE80211_IS_CHAN_ST(c)) 171170530Ssam setbit(ic->ic_modecaps, IEEE80211_MODE_STURBO_A); 172188782Ssam if (IEEE80211_IS_CHAN_HALF(c)) 173188782Ssam setbit(ic->ic_modecaps, IEEE80211_MODE_HALF); 174188782Ssam if (IEEE80211_IS_CHAN_QUARTER(c)) 175188782Ssam setbit(ic->ic_modecaps, IEEE80211_MODE_QUARTER); 176170530Ssam if (IEEE80211_IS_CHAN_HTA(c)) 177170530Ssam setbit(ic->ic_modecaps, IEEE80211_MODE_11NA); 178170530Ssam if (IEEE80211_IS_CHAN_HTG(c)) 179170530Ssam setbit(ic->ic_modecaps, IEEE80211_MODE_11NG); 180116742Ssam } 181170530Ssam /* initialize candidate channels to all available */ 182170530Ssam memcpy(ic->ic_chan_active, ic->ic_chan_avail, 183170530Ssam sizeof(ic->ic_chan_avail)); 184164645Ssam 185178354Ssam /* sort channel table to allow lookup optimizations */ 186178354Ssam ieee80211_sort_channels(ic->ic_channels, ic->ic_nchans); 187178354Ssam 188178354Ssam /* invalidate any previous state */ 189170530Ssam ic->ic_bsschan = IEEE80211_CHAN_ANYC; 190172233Ssam ic->ic_prevchan = NULL; 191178354Ssam ic->ic_csa_newchan = NULL; 192170530Ssam /* arbitrarily pick the first channel */ 193170530Ssam ic->ic_curchan = &ic->ic_channels[0]; 194190532Ssam ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 195170530Ssam 196164645Ssam /* fillin well-known rate sets if driver has not specified */ 197165569Ssam DEFAULTRATES(IEEE80211_MODE_11B, ieee80211_rateset_11b); 198165569Ssam DEFAULTRATES(IEEE80211_MODE_11G, ieee80211_rateset_11g); 199165569Ssam DEFAULTRATES(IEEE80211_MODE_11A, ieee80211_rateset_11a); 200165569Ssam DEFAULTRATES(IEEE80211_MODE_TURBO_A, ieee80211_rateset_11a); 201165569Ssam DEFAULTRATES(IEEE80211_MODE_TURBO_G, ieee80211_rateset_11g); 202187897Ssam DEFAULTRATES(IEEE80211_MODE_STURBO_A, ieee80211_rateset_11a); 203188782Ssam DEFAULTRATES(IEEE80211_MODE_HALF, ieee80211_rateset_half); 204188782Ssam DEFAULTRATES(IEEE80211_MODE_QUARTER, ieee80211_rateset_quarter); 205188774Ssam DEFAULTRATES(IEEE80211_MODE_11NA, ieee80211_rateset_11a); 206188774Ssam DEFAULTRATES(IEEE80211_MODE_11NG, ieee80211_rateset_11g); 207165569Ssam 208165569Ssam /* 209219596Sbschmidt * Setup required information to fill the mcsset field, if driver did 210219596Sbschmidt * not. Assume a 2T2R setup for historic reasons. 211219596Sbschmidt */ 212219596Sbschmidt if (ic->ic_rxstream == 0) 213219596Sbschmidt ic->ic_rxstream = 2; 214219596Sbschmidt if (ic->ic_txstream == 0) 215219596Sbschmidt ic->ic_txstream = 2; 216219596Sbschmidt 217219596Sbschmidt /* 218165569Ssam * Set auto mode to reset active channel state and any desired channel. 219165569Ssam */ 220165569Ssam (void) ieee80211_setmode(ic, IEEE80211_MODE_AUTO); 221165569Ssam#undef DEFAULTRATES 222165569Ssam} 223165569Ssam 224178354Ssamstatic void 225178354Ssamnull_update_mcast(struct ifnet *ifp) 226178354Ssam{ 227178354Ssam if_printf(ifp, "need multicast update callback\n"); 228178354Ssam} 229178354Ssam 230178354Ssamstatic void 231178354Ssamnull_update_promisc(struct ifnet *ifp) 232178354Ssam{ 233178354Ssam if_printf(ifp, "need promiscuous mode update callback\n"); 234178354Ssam} 235178354Ssam 236178521Ssamstatic int 237195846Ssamnull_transmit(struct ifnet *ifp, struct mbuf *m) 238195846Ssam{ 239195846Ssam m_freem(m); 240195846Ssam ifp->if_oerrors++; 241195846Ssam return EACCES; /* XXX EIO/EPERM? */ 242195846Ssam} 243195846Ssam 244195846Ssamstatic int 245178521Ssamnull_output(struct ifnet *ifp, struct mbuf *m, 246191148Skmacy struct sockaddr *dst, struct route *ro) 247178521Ssam{ 248178521Ssam if_printf(ifp, "discard raw packet\n"); 249195846Ssam return null_transmit(ifp, m); 250178521Ssam} 251178521Ssam 252178521Ssamstatic void 253178521Ssamnull_input(struct ifnet *ifp, struct mbuf *m) 254178521Ssam{ 255178521Ssam if_printf(ifp, "if_input should not be called\n"); 256178521Ssam m_freem(m); 257178521Ssam} 258178521Ssam 259178354Ssam/* 260178354Ssam * Attach/setup the common net80211 state. Called by 261178354Ssam * the driver on attach to prior to creating any vap's. 262178354Ssam */ 263165569Ssamvoid 264190526Ssamieee80211_ifattach(struct ieee80211com *ic, 265190526Ssam const uint8_t macaddr[IEEE80211_ADDR_LEN]) 266165569Ssam{ 267165569Ssam struct ifnet *ifp = ic->ic_ifp; 268178354Ssam struct sockaddr_dl *sdl; 269178354Ssam struct ifaddr *ifa; 270165569Ssam 271178354Ssam KASSERT(ifp->if_type == IFT_IEEE80211, ("if_type %d", ifp->if_type)); 272165569Ssam 273179388Ssam IEEE80211_LOCK_INIT(ic, ifp->if_xname); 274178354Ssam TAILQ_INIT(&ic->ic_vaps); 275191746Sthompsa 276191746Sthompsa /* Create a taskqueue for all state changes */ 277191746Sthompsa ic->ic_tq = taskqueue_create("ic_taskq", M_WAITOK | M_ZERO, 278191746Sthompsa taskqueue_thread_enqueue, &ic->ic_tq); 279191746Sthompsa taskqueue_start_threads(&ic->ic_tq, 1, PI_NET, "%s taskq", 280191746Sthompsa ifp->if_xname); 281165569Ssam /* 282165569Ssam * Fill in 802.11 available channel set, mark all 283165569Ssam * available channels as active, and pick a default 284165569Ssam * channel if not already specified. 285165569Ssam */ 286178354Ssam ieee80211_media_init(ic); 287170530Ssam 288178354Ssam ic->ic_update_mcast = null_update_mcast; 289178354Ssam ic->ic_update_promisc = null_update_promisc; 290116742Ssam 291195379Ssam ic->ic_hash_key = arc4random(); 292155688Ssam ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT; 293155688Ssam ic->ic_lintval = ic->ic_bintval; 294138568Ssam ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX; 295138568Ssam 296170530Ssam ieee80211_crypto_attach(ic); 297138568Ssam ieee80211_node_attach(ic); 298170530Ssam ieee80211_power_attach(ic); 299138568Ssam ieee80211_proto_attach(ic); 300190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 301190391Ssam ieee80211_superg_attach(ic); 302190391Ssam#endif 303170530Ssam ieee80211_ht_attach(ic); 304170530Ssam ieee80211_scan_attach(ic); 305178354Ssam ieee80211_regdomain_attach(ic); 306193843Ssam ieee80211_dfs_attach(ic); 307138568Ssam 308178354Ssam ieee80211_sysctl_attach(ic); 309138568Ssam 310178354Ssam ifp->if_addrlen = IEEE80211_ADDR_LEN; 311178354Ssam ifp->if_hdrlen = 0; 312178354Ssam if_attach(ifp); 313178354Ssam ifp->if_mtu = IEEE80211_MTU_MAX; 314178354Ssam ifp->if_broadcastaddr = ieee80211broadcastaddr; 315178521Ssam ifp->if_output = null_output; 316178521Ssam ifp->if_input = null_input; /* just in case */ 317178521Ssam ifp->if_resolvemulti = NULL; /* NB: callers check */ 318140915Ssam 319178354Ssam ifa = ifaddr_byindex(ifp->if_index); 320178354Ssam KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); 321178354Ssam sdl = (struct sockaddr_dl *)ifa->ifa_addr; 322178354Ssam sdl->sdl_type = IFT_ETHER; /* XXX IFT_IEEE80211? */ 323178354Ssam sdl->sdl_alen = IEEE80211_ADDR_LEN; 324190526Ssam IEEE80211_ADDR_COPY(LLADDR(sdl), macaddr); 325194760Srwatson ifa_free(ifa); 326116742Ssam} 327116742Ssam 328178354Ssam/* 329178354Ssam * Detach net80211 state on device detach. Tear down 330178354Ssam * all vap's and reclaim all common state prior to the 331178354Ssam * device state going away. Note we may call back into 332178354Ssam * driver; it must be prepared for this. 333178354Ssam */ 334116742Ssamvoid 335138568Ssamieee80211_ifdetach(struct ieee80211com *ic) 336116742Ssam{ 337138568Ssam struct ifnet *ifp = ic->ic_ifp; 338178354Ssam struct ieee80211vap *vap; 339116742Ssam 340193337Ssam if_detach(ifp); 341193337Ssam 342178354Ssam while ((vap = TAILQ_FIRST(&ic->ic_vaps)) != NULL) 343178354Ssam ieee80211_vap_destroy(vap); 344188533Sthompsa ieee80211_waitfor_parent(ic); 345138568Ssam 346138568Ssam ieee80211_sysctl_detach(ic); 347193843Ssam ieee80211_dfs_detach(ic); 348178354Ssam ieee80211_regdomain_detach(ic); 349170530Ssam ieee80211_scan_detach(ic); 350190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 351190391Ssam ieee80211_superg_detach(ic); 352190391Ssam#endif 353170530Ssam ieee80211_ht_detach(ic); 354166012Ssam /* NB: must be called before ieee80211_node_detach */ 355138568Ssam ieee80211_proto_detach(ic); 356138568Ssam ieee80211_crypto_detach(ic); 357170530Ssam ieee80211_power_detach(ic); 358138568Ssam ieee80211_node_detach(ic); 359193337Ssam 360116742Ssam ifmedia_removeall(&ic->ic_media); 361191746Sthompsa taskqueue_free(ic->ic_tq); 362170530Ssam IEEE80211_LOCK_DESTROY(ic); 363178354Ssam} 364138568Ssam 365178354Ssam/* 366178354Ssam * Default reset method for use with the ioctl support. This 367178354Ssam * method is invoked after any state change in the 802.11 368178354Ssam * layer that should be propagated to the hardware but not 369178354Ssam * require re-initialization of the 802.11 state machine (e.g 370178354Ssam * rescanning for an ap). We always return ENETRESET which 371178354Ssam * should cause the driver to re-initialize the device. Drivers 372178354Ssam * can override this method to implement more optimized support. 373178354Ssam */ 374178354Ssamstatic int 375178354Ssamdefault_reset(struct ieee80211vap *vap, u_long cmd) 376178354Ssam{ 377178354Ssam return ENETRESET; 378178354Ssam} 379178354Ssam 380178354Ssam/* 381178354Ssam * Prepare a vap for use. Drivers use this call to 382178354Ssam * setup net80211 state in new vap's prior attaching 383178354Ssam * them with ieee80211_vap_attach (below). 384178354Ssam */ 385178354Ssamint 386178354Ssamieee80211_vap_setup(struct ieee80211com *ic, struct ieee80211vap *vap, 387178354Ssam const char name[IFNAMSIZ], int unit, int opmode, int flags, 388178354Ssam const uint8_t bssid[IEEE80211_ADDR_LEN], 389178354Ssam const uint8_t macaddr[IEEE80211_ADDR_LEN]) 390178354Ssam{ 391178354Ssam struct ifnet *ifp; 392178354Ssam 393178354Ssam ifp = if_alloc(IFT_ETHER); 394178354Ssam if (ifp == NULL) { 395178354Ssam if_printf(ic->ic_ifp, "%s: unable to allocate ifnet\n", 396178354Ssam __func__); 397178354Ssam return ENOMEM; 398178354Ssam } 399178354Ssam if_initname(ifp, name, unit); 400178354Ssam ifp->if_softc = vap; /* back pointer */ 401178354Ssam ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; 402178354Ssam ifp->if_start = ieee80211_start; 403178354Ssam ifp->if_ioctl = ieee80211_ioctl; 404178354Ssam ifp->if_init = ieee80211_init; 405178354Ssam /* NB: input+output filled in by ether_ifattach */ 406207554Ssobomax IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen); 407207554Ssobomax ifp->if_snd.ifq_drv_maxlen = ifqmaxlen; 408178354Ssam IFQ_SET_READY(&ifp->if_snd); 409178354Ssam 410178354Ssam vap->iv_ifp = ifp; 411178354Ssam vap->iv_ic = ic; 412178354Ssam vap->iv_flags = ic->ic_flags; /* propagate common flags */ 413178354Ssam vap->iv_flags_ext = ic->ic_flags_ext; 414178354Ssam vap->iv_flags_ven = ic->ic_flags_ven; 415178354Ssam vap->iv_caps = ic->ic_caps &~ IEEE80211_C_OPMODE; 416178354Ssam vap->iv_htcaps = ic->ic_htcaps; 417205513Srpaulo vap->iv_htextcaps = ic->ic_htextcaps; 418178354Ssam vap->iv_opmode = opmode; 419178957Ssam vap->iv_caps |= ieee80211_opcap[opmode]; 420178354Ssam switch (opmode) { 421178354Ssam case IEEE80211_M_WDS: 422178354Ssam /* 423178354Ssam * WDS links must specify the bssid of the far end. 424178354Ssam * For legacy operation this is a static relationship. 425178354Ssam * For non-legacy operation the station must associate 426178354Ssam * and be authorized to pass traffic. Plumbing the 427178354Ssam * vap to the proper node happens when the vap 428178354Ssam * transitions to RUN state. 429178354Ssam */ 430178354Ssam IEEE80211_ADDR_COPY(vap->iv_des_bssid, bssid); 431178354Ssam vap->iv_flags |= IEEE80211_F_DESBSSID; 432178354Ssam if (flags & IEEE80211_CLONE_WDSLEGACY) 433178354Ssam vap->iv_flags_ext |= IEEE80211_FEXT_WDSLEGACY; 434178354Ssam break; 435186904Ssam#ifdef IEEE80211_SUPPORT_TDMA 436186904Ssam case IEEE80211_M_AHDEMO: 437186904Ssam if (flags & IEEE80211_CLONE_TDMA) { 438186904Ssam /* NB: checked before clone operation allowed */ 439186904Ssam KASSERT(ic->ic_caps & IEEE80211_C_TDMA, 440186904Ssam ("not TDMA capable, ic_caps 0x%x", ic->ic_caps)); 441186904Ssam /* 442186904Ssam * Propagate TDMA capability to mark vap; this 443186904Ssam * cannot be removed and is used to distinguish 444186904Ssam * regular ahdemo operation from ahdemo+tdma. 445186904Ssam */ 446186904Ssam vap->iv_caps |= IEEE80211_C_TDMA; 447186904Ssam } 448186904Ssam break; 449186904Ssam#endif 450178354Ssam } 451184278Ssam /* auto-enable s/w beacon miss support */ 452184278Ssam if (flags & IEEE80211_CLONE_NOBEACONS) 453184278Ssam vap->iv_flags_ext |= IEEE80211_FEXT_SWBMISS; 454202612Sthompsa /* auto-generated or user supplied MAC address */ 455202612Sthompsa if (flags & (IEEE80211_CLONE_BSSID|IEEE80211_CLONE_MACADDR)) 456202612Sthompsa vap->iv_flags_ext |= IEEE80211_FEXT_UNIQMAC; 457178354Ssam /* 458178354Ssam * Enable various functionality by default if we're 459178354Ssam * capable; the driver can override us if it knows better. 460178354Ssam */ 461178354Ssam if (vap->iv_caps & IEEE80211_C_WME) 462178354Ssam vap->iv_flags |= IEEE80211_F_WME; 463178354Ssam if (vap->iv_caps & IEEE80211_C_BURST) 464178354Ssam vap->iv_flags |= IEEE80211_F_BURST; 465178354Ssam /* NB: bg scanning only makes sense for station mode right now */ 466178354Ssam if (vap->iv_opmode == IEEE80211_M_STA && 467178354Ssam (vap->iv_caps & IEEE80211_C_BGSCAN)) 468178354Ssam vap->iv_flags |= IEEE80211_F_BGSCAN; 469178957Ssam vap->iv_flags |= IEEE80211_F_DOTH; /* XXX no cap, just ena */ 470178954Ssam /* NB: DFS support only makes sense for ap mode right now */ 471178954Ssam if (vap->iv_opmode == IEEE80211_M_HOSTAP && 472178954Ssam (vap->iv_caps & IEEE80211_C_DFS)) 473178354Ssam vap->iv_flags_ext |= IEEE80211_FEXT_DFS; 474178354Ssam 475178354Ssam vap->iv_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */ 476178354Ssam vap->iv_bmissthreshold = IEEE80211_HWBMISS_DEFAULT; 477178354Ssam vap->iv_dtim_period = IEEE80211_DTIM_DEFAULT; 478178354Ssam /* 479178354Ssam * Install a default reset method for the ioctl support; 480178354Ssam * the driver can override this. 481178354Ssam */ 482178354Ssam vap->iv_reset = default_reset; 483178354Ssam 484178354Ssam IEEE80211_ADDR_COPY(vap->iv_myaddr, macaddr); 485178354Ssam 486178354Ssam ieee80211_sysctl_vattach(vap); 487178354Ssam ieee80211_crypto_vattach(vap); 488178354Ssam ieee80211_node_vattach(vap); 489178354Ssam ieee80211_power_vattach(vap); 490178354Ssam ieee80211_proto_vattach(vap); 491190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 492190391Ssam ieee80211_superg_vattach(vap); 493190391Ssam#endif 494178354Ssam ieee80211_ht_vattach(vap); 495178354Ssam ieee80211_scan_vattach(vap); 496178354Ssam ieee80211_regdomain_vattach(vap); 497192468Ssam ieee80211_radiotap_vattach(vap); 498214894Sbschmidt ieee80211_ratectl_set(vap, IEEE80211_RATECTL_NONE); 499178354Ssam 500178354Ssam return 0; 501178354Ssam} 502178354Ssam 503178354Ssam/* 504178354Ssam * Activate a vap. State should have been prepared with a 505178354Ssam * call to ieee80211_vap_setup and by the driver. On return 506178354Ssam * from this call the vap is ready for use. 507178354Ssam */ 508178354Ssamint 509178354Ssamieee80211_vap_attach(struct ieee80211vap *vap, 510178354Ssam ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) 511178354Ssam{ 512178354Ssam struct ifnet *ifp = vap->iv_ifp; 513178354Ssam struct ieee80211com *ic = vap->iv_ic; 514178354Ssam struct ifmediareq imr; 515178354Ssam int maxrate; 516178354Ssam 517178354Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 518178354Ssam "%s: %s parent %s flags 0x%x flags_ext 0x%x\n", 519178354Ssam __func__, ieee80211_opmode_name[vap->iv_opmode], 520178354Ssam ic->ic_ifp->if_xname, vap->iv_flags, vap->iv_flags_ext); 521178354Ssam 522178354Ssam /* 523178354Ssam * Do late attach work that cannot happen until after 524178354Ssam * the driver has had a chance to override defaults. 525178354Ssam */ 526178354Ssam ieee80211_node_latevattach(vap); 527178354Ssam ieee80211_power_latevattach(vap); 528178354Ssam 529178354Ssam maxrate = ieee80211_media_setup(ic, &vap->iv_media, vap->iv_caps, 530178354Ssam vap->iv_opmode == IEEE80211_M_STA, media_change, media_stat); 531178354Ssam ieee80211_media_status(ifp, &imr); 532178354Ssam /* NB: strip explicit mode; we're actually in autoselect */ 533188106Ssam ifmedia_set(&vap->iv_media, 534188106Ssam imr.ifm_active &~ (IFM_MMASK | IFM_IEEE80211_TURBO)); 535178354Ssam if (maxrate) 536178354Ssam ifp->if_baudrate = IF_Mbps(maxrate); 537178354Ssam 538178354Ssam ether_ifattach(ifp, vap->iv_myaddr); 539195846Ssam if (vap->iv_opmode == IEEE80211_M_MONITOR) { 540195846Ssam /* NB: disallow transmit */ 541195846Ssam ifp->if_transmit = null_transmit; 542195846Ssam ifp->if_output = null_output; 543195846Ssam } else { 544195846Ssam /* hook output method setup by ether_ifattach */ 545195846Ssam vap->iv_output = ifp->if_output; 546195846Ssam ifp->if_output = ieee80211_output; 547195846Ssam } 548178354Ssam /* NB: if_mtu set by ether_ifattach to ETHERMTU */ 549178354Ssam 550178354Ssam IEEE80211_LOCK(ic); 551178354Ssam TAILQ_INSERT_TAIL(&ic->ic_vaps, vap, iv_next); 552178354Ssam ieee80211_syncflag_locked(ic, IEEE80211_F_WME); 553190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 554178354Ssam ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); 555190391Ssam#endif 556178354Ssam ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); 557178354Ssam ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); 558193655Ssam ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT); 559193655Ssam ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40); 560178354Ssam ieee80211_syncifflag_locked(ic, IFF_PROMISC); 561178354Ssam ieee80211_syncifflag_locked(ic, IFF_ALLMULTI); 562178354Ssam IEEE80211_UNLOCK(ic); 563178354Ssam 564178354Ssam return 1; 565178354Ssam} 566178354Ssam 567178354Ssam/* 568178354Ssam * Tear down vap state and reclaim the ifnet. 569178354Ssam * The driver is assumed to have prepared for 570178354Ssam * this; e.g. by turning off interrupts for the 571178354Ssam * underlying device. 572178354Ssam */ 573178354Ssamvoid 574178354Ssamieee80211_vap_detach(struct ieee80211vap *vap) 575178354Ssam{ 576178354Ssam struct ieee80211com *ic = vap->iv_ic; 577178354Ssam struct ifnet *ifp = vap->iv_ifp; 578178354Ssam 579178354Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s parent %s\n", 580178354Ssam __func__, ieee80211_opmode_name[vap->iv_opmode], 581178354Ssam ic->ic_ifp->if_xname); 582178354Ssam 583193312Ssam /* NB: bpfdetach is called by ether_ifdetach and claims all taps */ 584193312Ssam ether_ifdetach(ifp); 585178354Ssam 586193312Ssam ieee80211_stop(vap); 587193312Ssam 588191746Sthompsa /* 589191746Sthompsa * Flush any deferred vap tasks. 590191746Sthompsa */ 591191746Sthompsa ieee80211_draintask(ic, &vap->iv_nstate_task); 592191746Sthompsa ieee80211_draintask(ic, &vap->iv_swbmiss_task); 593191746Sthompsa 594196159Ssam /* XXX band-aid until ifnet handles this for us */ 595196159Ssam taskqueue_drain(taskqueue_swi, &ifp->if_linktask); 596196159Ssam 597191746Sthompsa IEEE80211_LOCK(ic); 598191746Sthompsa KASSERT(vap->iv_state == IEEE80211_S_INIT , ("vap still running")); 599178354Ssam TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next); 600178354Ssam ieee80211_syncflag_locked(ic, IEEE80211_F_WME); 601190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 602178354Ssam ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); 603190391Ssam#endif 604178354Ssam ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); 605178354Ssam ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); 606193655Ssam ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT); 607193655Ssam ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40); 608192468Ssam /* NB: this handles the bpfdetach done below */ 609192468Ssam ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_BPF); 610178354Ssam ieee80211_syncifflag_locked(ic, IFF_PROMISC); 611178354Ssam ieee80211_syncifflag_locked(ic, IFF_ALLMULTI); 612178354Ssam IEEE80211_UNLOCK(ic); 613178354Ssam 614178354Ssam ifmedia_removeall(&vap->iv_media); 615178354Ssam 616192468Ssam ieee80211_radiotap_vdetach(vap); 617178354Ssam ieee80211_regdomain_vdetach(vap); 618178354Ssam ieee80211_scan_vdetach(vap); 619190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 620190391Ssam ieee80211_superg_vdetach(vap); 621190391Ssam#endif 622178354Ssam ieee80211_ht_vdetach(vap); 623178354Ssam /* NB: must be before ieee80211_node_vdetach */ 624178354Ssam ieee80211_proto_vdetach(vap); 625178354Ssam ieee80211_crypto_vdetach(vap); 626178354Ssam ieee80211_power_vdetach(vap); 627178354Ssam ieee80211_node_vdetach(vap); 628178354Ssam ieee80211_sysctl_vdetach(vap); 629182674Sweongyo 630182674Sweongyo if_free(ifp); 631116742Ssam} 632116742Ssam 633178354Ssam/* 634178354Ssam * Synchronize flag bit state in the parent ifnet structure 635178354Ssam * according to the state of all vap ifnet's. This is used, 636178354Ssam * for example, to handle IFF_PROMISC and IFF_ALLMULTI. 637178354Ssam */ 638178354Ssamvoid 639178354Ssamieee80211_syncifflag_locked(struct ieee80211com *ic, int flag) 640178354Ssam{ 641178354Ssam struct ifnet *ifp = ic->ic_ifp; 642178354Ssam struct ieee80211vap *vap; 643178354Ssam int bit, oflags; 644178354Ssam 645178354Ssam IEEE80211_LOCK_ASSERT(ic); 646178354Ssam 647178354Ssam bit = 0; 648178354Ssam TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 649178354Ssam if (vap->iv_ifp->if_flags & flag) { 650178354Ssam /* 651178354Ssam * XXX the bridge sets PROMISC but we don't want to 652178354Ssam * enable it on the device, discard here so all the 653178354Ssam * drivers don't need to special-case it 654178354Ssam */ 655178354Ssam if (flag == IFF_PROMISC && 656195847Ssam !(vap->iv_opmode == IEEE80211_M_MONITOR || 657196004Ssam (vap->iv_opmode == IEEE80211_M_AHDEMO && 658196004Ssam (vap->iv_caps & IEEE80211_C_TDMA) == 0))) 659178354Ssam continue; 660178354Ssam bit = 1; 661178354Ssam break; 662178354Ssam } 663178354Ssam oflags = ifp->if_flags; 664178354Ssam if (bit) 665178354Ssam ifp->if_flags |= flag; 666178354Ssam else 667178354Ssam ifp->if_flags &= ~flag; 668178354Ssam if ((ifp->if_flags ^ oflags) & flag) { 669178354Ssam /* XXX should we return 1/0 and let caller do this? */ 670178354Ssam if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 671178354Ssam if (flag == IFF_PROMISC) 672191746Sthompsa ieee80211_runtask(ic, &ic->ic_promisc_task); 673178354Ssam else if (flag == IFF_ALLMULTI) 674191746Sthompsa ieee80211_runtask(ic, &ic->ic_mcast_task); 675178354Ssam } 676178354Ssam } 677178354Ssam} 678178354Ssam 679178354Ssam/* 680178354Ssam * Synchronize flag bit state in the com structure 681178354Ssam * according to the state of all vap's. This is used, 682178354Ssam * for example, to handle state changes via ioctls. 683178354Ssam */ 684178354Ssamstatic void 685178354Ssamieee80211_syncflag_locked(struct ieee80211com *ic, int flag) 686178354Ssam{ 687178354Ssam struct ieee80211vap *vap; 688178354Ssam int bit; 689178354Ssam 690178354Ssam IEEE80211_LOCK_ASSERT(ic); 691178354Ssam 692178354Ssam bit = 0; 693178354Ssam TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 694178354Ssam if (vap->iv_flags & flag) { 695178354Ssam bit = 1; 696178354Ssam break; 697178354Ssam } 698178354Ssam if (bit) 699178354Ssam ic->ic_flags |= flag; 700178354Ssam else 701178354Ssam ic->ic_flags &= ~flag; 702178354Ssam} 703178354Ssam 704178354Ssamvoid 705178354Ssamieee80211_syncflag(struct ieee80211vap *vap, int flag) 706178354Ssam{ 707178354Ssam struct ieee80211com *ic = vap->iv_ic; 708178354Ssam 709178354Ssam IEEE80211_LOCK(ic); 710178354Ssam if (flag < 0) { 711178354Ssam flag = -flag; 712178354Ssam vap->iv_flags &= ~flag; 713178354Ssam } else 714178354Ssam vap->iv_flags |= flag; 715178354Ssam ieee80211_syncflag_locked(ic, flag); 716178354Ssam IEEE80211_UNLOCK(ic); 717178354Ssam} 718178354Ssam 719178354Ssam/* 720193655Ssam * Synchronize flags_ht bit state in the com structure 721178354Ssam * according to the state of all vap's. This is used, 722178354Ssam * for example, to handle state changes via ioctls. 723178354Ssam */ 724178354Ssamstatic void 725193655Ssamieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag) 726193655Ssam{ 727193655Ssam struct ieee80211vap *vap; 728193655Ssam int bit; 729193655Ssam 730193655Ssam IEEE80211_LOCK_ASSERT(ic); 731193655Ssam 732193655Ssam bit = 0; 733193655Ssam TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 734193655Ssam if (vap->iv_flags_ht & flag) { 735193655Ssam bit = 1; 736193655Ssam break; 737193655Ssam } 738193655Ssam if (bit) 739193655Ssam ic->ic_flags_ht |= flag; 740193655Ssam else 741193655Ssam ic->ic_flags_ht &= ~flag; 742193655Ssam} 743193655Ssam 744193655Ssamvoid 745193655Ssamieee80211_syncflag_ht(struct ieee80211vap *vap, int flag) 746193655Ssam{ 747193655Ssam struct ieee80211com *ic = vap->iv_ic; 748193655Ssam 749193655Ssam IEEE80211_LOCK(ic); 750193655Ssam if (flag < 0) { 751193655Ssam flag = -flag; 752193655Ssam vap->iv_flags_ht &= ~flag; 753193655Ssam } else 754193655Ssam vap->iv_flags_ht |= flag; 755193655Ssam ieee80211_syncflag_ht_locked(ic, flag); 756193655Ssam IEEE80211_UNLOCK(ic); 757193655Ssam} 758193655Ssam 759193655Ssam/* 760193655Ssam * Synchronize flags_ext bit state in the com structure 761193655Ssam * according to the state of all vap's. This is used, 762193655Ssam * for example, to handle state changes via ioctls. 763193655Ssam */ 764193655Ssamstatic void 765178354Ssamieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag) 766178354Ssam{ 767178354Ssam struct ieee80211vap *vap; 768178354Ssam int bit; 769178354Ssam 770178354Ssam IEEE80211_LOCK_ASSERT(ic); 771178354Ssam 772178354Ssam bit = 0; 773178354Ssam TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 774178354Ssam if (vap->iv_flags_ext & flag) { 775178354Ssam bit = 1; 776178354Ssam break; 777178354Ssam } 778178354Ssam if (bit) 779178354Ssam ic->ic_flags_ext |= flag; 780178354Ssam else 781178354Ssam ic->ic_flags_ext &= ~flag; 782178354Ssam} 783178354Ssam 784178354Ssamvoid 785178354Ssamieee80211_syncflag_ext(struct ieee80211vap *vap, int flag) 786178354Ssam{ 787178354Ssam struct ieee80211com *ic = vap->iv_ic; 788178354Ssam 789178354Ssam IEEE80211_LOCK(ic); 790178354Ssam if (flag < 0) { 791178354Ssam flag = -flag; 792178354Ssam vap->iv_flags_ext &= ~flag; 793178354Ssam } else 794178354Ssam vap->iv_flags_ext |= flag; 795178354Ssam ieee80211_syncflag_ext_locked(ic, flag); 796178354Ssam IEEE80211_UNLOCK(ic); 797178354Ssam} 798178354Ssam 799166012Ssamstatic __inline int 800166012Ssammapgsm(u_int freq, u_int flags) 801166012Ssam{ 802166012Ssam freq *= 10; 803166012Ssam if (flags & IEEE80211_CHAN_QUARTER) 804166012Ssam freq += 5; 805166012Ssam else if (flags & IEEE80211_CHAN_HALF) 806166012Ssam freq += 10; 807166012Ssam else 808166012Ssam freq += 20; 809166012Ssam /* NB: there is no 907/20 wide but leave room */ 810166012Ssam return (freq - 906*10) / 5; 811166012Ssam} 812166012Ssam 813166012Ssamstatic __inline int 814166012Ssammappsb(u_int freq, u_int flags) 815166012Ssam{ 816166012Ssam return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5; 817166012Ssam} 818166012Ssam 819116742Ssam/* 820116742Ssam * Convert MHz frequency to IEEE channel number. 821116742Ssam */ 822152450Ssamint 823116742Ssamieee80211_mhz2ieee(u_int freq, u_int flags) 824116742Ssam{ 825167430Ssam#define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990) 826166012Ssam if (flags & IEEE80211_CHAN_GSM) 827166012Ssam return mapgsm(freq, flags); 828116742Ssam if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 829116742Ssam if (freq == 2484) 830116742Ssam return 14; 831116742Ssam if (freq < 2484) 832152450Ssam return ((int) freq - 2407) / 5; 833116742Ssam else 834116742Ssam return 15 + ((freq - 2512) / 20); 835116899Ssam } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */ 836165569Ssam if (freq <= 5000) { 837170530Ssam /* XXX check regdomain? */ 838167430Ssam if (IS_FREQ_IN_PSB(freq)) 839166012Ssam return mappsb(freq, flags); 840152450Ssam return (freq - 4000) / 5; 841165569Ssam } else 842152450Ssam return (freq - 5000) / 5; 843116742Ssam } else { /* either, guess */ 844116742Ssam if (freq == 2484) 845116742Ssam return 14; 846166012Ssam if (freq < 2484) { 847166012Ssam if (907 <= freq && freq <= 922) 848166012Ssam return mapgsm(freq, flags); 849152450Ssam return ((int) freq - 2407) / 5; 850166012Ssam } 851152450Ssam if (freq < 5000) { 852167430Ssam if (IS_FREQ_IN_PSB(freq)) 853166012Ssam return mappsb(freq, flags); 854165569Ssam else if (freq > 4900) 855152450Ssam return (freq - 4000) / 5; 856152450Ssam else 857152450Ssam return 15 + ((freq - 2512) / 20); 858152450Ssam } 859116742Ssam return (freq - 5000) / 5; 860116742Ssam } 861167430Ssam#undef IS_FREQ_IN_PSB 862116742Ssam} 863116742Ssam 864116742Ssam/* 865116742Ssam * Convert channel to IEEE channel number. 866116742Ssam */ 867152450Ssamint 868165825Smjacobieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c) 869116742Ssam{ 870170530Ssam if (c == NULL) { 871138568Ssam if_printf(ic->ic_ifp, "invalid channel (NULL)\n"); 872117039Ssam return 0; /* XXX */ 873116742Ssam } 874170530Ssam return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee); 875116742Ssam} 876116742Ssam 877116742Ssam/* 878116742Ssam * Convert IEEE channel number to MHz frequency. 879116742Ssam */ 880116742Ssamu_int 881116742Ssamieee80211_ieee2mhz(u_int chan, u_int flags) 882116742Ssam{ 883166012Ssam if (flags & IEEE80211_CHAN_GSM) 884166012Ssam return 907 + 5 * (chan / 10); 885116742Ssam if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ 886116742Ssam if (chan == 14) 887116742Ssam return 2484; 888116742Ssam if (chan < 14) 889116742Ssam return 2407 + chan*5; 890116742Ssam else 891116742Ssam return 2512 + ((chan-15)*20); 892116742Ssam } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */ 893165569Ssam if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) { 894165569Ssam chan -= 37; 895165569Ssam return 4940 + chan*5 + (chan % 5 ? 2 : 0); 896165569Ssam } 897116742Ssam return 5000 + (chan*5); 898116742Ssam } else { /* either, guess */ 899166012Ssam /* XXX can't distinguish PSB+GSM channels */ 900116742Ssam if (chan == 14) 901116742Ssam return 2484; 902116742Ssam if (chan < 14) /* 0-13 */ 903116742Ssam return 2407 + chan*5; 904116742Ssam if (chan < 27) /* 15-26 */ 905116742Ssam return 2512 + ((chan-15)*20); 906116742Ssam return 5000 + (chan*5); 907116742Ssam } 908116742Ssam} 909116742Ssam 910116742Ssam/* 911170530Ssam * Locate a channel given a frequency+flags. We cache 912178354Ssam * the previous lookup to optimize switching between two 913170530Ssam * channels--as happens with dynamic turbo. 914170530Ssam */ 915170530Ssamstruct ieee80211_channel * 916170530Ssamieee80211_find_channel(struct ieee80211com *ic, int freq, int flags) 917170530Ssam{ 918170530Ssam struct ieee80211_channel *c; 919170530Ssam int i; 920170530Ssam 921170530Ssam flags &= IEEE80211_CHAN_ALLTURBO; 922170530Ssam c = ic->ic_prevchan; 923170530Ssam if (c != NULL && c->ic_freq == freq && 924170530Ssam (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 925170530Ssam return c; 926170530Ssam /* brute force search */ 927170530Ssam for (i = 0; i < ic->ic_nchans; i++) { 928170530Ssam c = &ic->ic_channels[i]; 929170530Ssam if (c->ic_freq == freq && 930170530Ssam (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 931170530Ssam return c; 932170530Ssam } 933170530Ssam return NULL; 934170530Ssam} 935170530Ssam 936173861Ssam/* 937173861Ssam * Locate a channel given a channel number+flags. We cache 938173861Ssam * the previous lookup to optimize switching between two 939173861Ssam * channels--as happens with dynamic turbo. 940173861Ssam */ 941173861Ssamstruct ieee80211_channel * 942173861Ssamieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags) 943173861Ssam{ 944173861Ssam struct ieee80211_channel *c; 945173861Ssam int i; 946173861Ssam 947173861Ssam flags &= IEEE80211_CHAN_ALLTURBO; 948173861Ssam c = ic->ic_prevchan; 949173861Ssam if (c != NULL && c->ic_ieee == ieee && 950173861Ssam (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 951173861Ssam return c; 952173861Ssam /* brute force search */ 953173861Ssam for (i = 0; i < ic->ic_nchans; i++) { 954173861Ssam c = &ic->ic_channels[i]; 955173861Ssam if (c->ic_ieee == ieee && 956173861Ssam (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) 957173861Ssam return c; 958173861Ssam } 959173861Ssam return NULL; 960173861Ssam} 961173861Ssam 962170530Ssamstatic void 963178354Ssamaddmedia(struct ifmedia *media, int caps, int addsta, int mode, int mword) 964170530Ssam{ 965170530Ssam#define ADD(_ic, _s, _o) \ 966178354Ssam ifmedia_add(media, \ 967170530Ssam IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL) 968170530Ssam static const u_int mopts[IEEE80211_MODE_MAX] = { 969188106Ssam [IEEE80211_MODE_AUTO] = IFM_AUTO, 970188106Ssam [IEEE80211_MODE_11A] = IFM_IEEE80211_11A, 971188106Ssam [IEEE80211_MODE_11B] = IFM_IEEE80211_11B, 972188106Ssam [IEEE80211_MODE_11G] = IFM_IEEE80211_11G, 973188106Ssam [IEEE80211_MODE_FH] = IFM_IEEE80211_FH, 974188106Ssam [IEEE80211_MODE_TURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO, 975188106Ssam [IEEE80211_MODE_TURBO_G] = IFM_IEEE80211_11G|IFM_IEEE80211_TURBO, 976188106Ssam [IEEE80211_MODE_STURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO, 977188782Ssam [IEEE80211_MODE_HALF] = IFM_IEEE80211_11A, /* XXX */ 978188782Ssam [IEEE80211_MODE_QUARTER] = IFM_IEEE80211_11A, /* XXX */ 979188106Ssam [IEEE80211_MODE_11NA] = IFM_IEEE80211_11NA, 980188106Ssam [IEEE80211_MODE_11NG] = IFM_IEEE80211_11NG, 981170530Ssam }; 982170530Ssam u_int mopt; 983170530Ssam 984170530Ssam mopt = mopts[mode]; 985178354Ssam if (addsta) 986178354Ssam ADD(ic, mword, mopt); /* STA mode has no cap */ 987178354Ssam if (caps & IEEE80211_C_IBSS) 988178354Ssam ADD(media, mword, mopt | IFM_IEEE80211_ADHOC); 989178354Ssam if (caps & IEEE80211_C_HOSTAP) 990178354Ssam ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP); 991178354Ssam if (caps & IEEE80211_C_AHDEMO) 992178354Ssam ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0); 993178354Ssam if (caps & IEEE80211_C_MONITOR) 994178354Ssam ADD(media, mword, mopt | IFM_IEEE80211_MONITOR); 995178354Ssam if (caps & IEEE80211_C_WDS) 996178354Ssam ADD(media, mword, mopt | IFM_IEEE80211_WDS); 997195618Srpaulo if (caps & IEEE80211_C_MBSS) 998195618Srpaulo ADD(media, mword, mopt | IFM_IEEE80211_MBSS); 999170530Ssam#undef ADD 1000170530Ssam} 1001170530Ssam 1002170530Ssam/* 1003116742Ssam * Setup the media data structures according to the channel and 1004178354Ssam * rate tables. 1005116742Ssam */ 1006178354Ssamstatic int 1007178354Ssamieee80211_media_setup(struct ieee80211com *ic, 1008178354Ssam struct ifmedia *media, int caps, int addsta, 1009116742Ssam ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) 1010116742Ssam{ 1011170530Ssam int i, j, mode, rate, maxrate, mword, r; 1012170530Ssam const struct ieee80211_rateset *rs; 1013116742Ssam struct ieee80211_rateset allrates; 1014116742Ssam 1015118887Ssam /* 1016116742Ssam * Fill in media characteristics. 1017116742Ssam */ 1018178354Ssam ifmedia_init(media, 0, media_change, media_stat); 1019116742Ssam maxrate = 0; 1020170530Ssam /* 1021170530Ssam * Add media for legacy operating modes. 1022170530Ssam */ 1023116742Ssam memset(&allrates, 0, sizeof(allrates)); 1024170530Ssam for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) { 1025167468Ssam if (isclr(ic->ic_modecaps, mode)) 1026116742Ssam continue; 1027178354Ssam addmedia(media, caps, addsta, mode, IFM_AUTO); 1028116742Ssam if (mode == IEEE80211_MODE_AUTO) 1029116742Ssam continue; 1030116742Ssam rs = &ic->ic_sup_rates[mode]; 1031116742Ssam for (i = 0; i < rs->rs_nrates; i++) { 1032116742Ssam rate = rs->rs_rates[i]; 1033116742Ssam mword = ieee80211_rate2media(ic, rate, mode); 1034116742Ssam if (mword == 0) 1035116742Ssam continue; 1036178354Ssam addmedia(media, caps, addsta, mode, mword); 1037116742Ssam /* 1038170530Ssam * Add legacy rate to the collection of all rates. 1039116742Ssam */ 1040116742Ssam r = rate & IEEE80211_RATE_VAL; 1041116742Ssam for (j = 0; j < allrates.rs_nrates; j++) 1042116742Ssam if (allrates.rs_rates[j] == r) 1043116742Ssam break; 1044116742Ssam if (j == allrates.rs_nrates) { 1045116742Ssam /* unique, add to the set */ 1046116742Ssam allrates.rs_rates[j] = r; 1047116742Ssam allrates.rs_nrates++; 1048116742Ssam } 1049116742Ssam rate = (rate & IEEE80211_RATE_VAL) / 2; 1050116742Ssam if (rate > maxrate) 1051116742Ssam maxrate = rate; 1052116742Ssam } 1053116742Ssam } 1054116742Ssam for (i = 0; i < allrates.rs_nrates; i++) { 1055116742Ssam mword = ieee80211_rate2media(ic, allrates.rs_rates[i], 1056116742Ssam IEEE80211_MODE_AUTO); 1057116742Ssam if (mword == 0) 1058116742Ssam continue; 1059170530Ssam /* NB: remove media options from mword */ 1060178354Ssam addmedia(media, caps, addsta, 1061178354Ssam IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword)); 1062116742Ssam } 1063170530Ssam /* 1064170530Ssam * Add HT/11n media. Note that we do not have enough 1065170530Ssam * bits in the media subtype to express the MCS so we 1066170530Ssam * use a "placeholder" media subtype and any fixed MCS 1067170530Ssam * must be specified with a different mechanism. 1068170530Ssam */ 1069188782Ssam for (; mode <= IEEE80211_MODE_11NG; mode++) { 1070170530Ssam if (isclr(ic->ic_modecaps, mode)) 1071170530Ssam continue; 1072178354Ssam addmedia(media, caps, addsta, mode, IFM_AUTO); 1073178354Ssam addmedia(media, caps, addsta, mode, IFM_IEEE80211_MCS); 1074170530Ssam } 1075170530Ssam if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) || 1076170530Ssam isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) { 1077178354Ssam addmedia(media, caps, addsta, 1078178354Ssam IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS); 1079219599Sbschmidt i = ic->ic_txstream * 8 - 1; 1080219599Sbschmidt if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) && 1081219599Sbschmidt (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI40)) 1082219599Sbschmidt rate = ieee80211_htrates[i].ht40_rate_400ns; 1083219599Sbschmidt else if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40)) 1084219599Sbschmidt rate = ieee80211_htrates[i].ht40_rate_800ns; 1085219599Sbschmidt else if ((ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI20)) 1086219599Sbschmidt rate = ieee80211_htrates[i].ht20_rate_400ns; 1087219599Sbschmidt else 1088219599Sbschmidt rate = ieee80211_htrates[i].ht20_rate_800ns; 1089219599Sbschmidt if (rate > maxrate) 1090219599Sbschmidt maxrate = rate; 1091170530Ssam } 1092178354Ssam return maxrate; 1093178354Ssam} 1094116742Ssam 1095178354Ssamvoid 1096178354Ssamieee80211_media_init(struct ieee80211com *ic) 1097178354Ssam{ 1098178354Ssam struct ifnet *ifp = ic->ic_ifp; 1099178354Ssam int maxrate; 1100178354Ssam 1101178354Ssam /* NB: this works because the structure is initialized to zero */ 1102178354Ssam if (!LIST_EMPTY(&ic->ic_media.ifm_list)) { 1103178354Ssam /* 1104178354Ssam * We are re-initializing the channel list; clear 1105178354Ssam * the existing media state as the media routines 1106178354Ssam * don't suppress duplicates. 1107178354Ssam */ 1108178354Ssam ifmedia_removeall(&ic->ic_media); 1109178354Ssam } 1110178354Ssam ieee80211_chan_init(ic); 1111178354Ssam 1112178354Ssam /* 1113178354Ssam * Recalculate media settings in case new channel list changes 1114178354Ssam * the set of available modes. 1115178354Ssam */ 1116178354Ssam maxrate = ieee80211_media_setup(ic, &ic->ic_media, ic->ic_caps, 1, 1117178354Ssam ieee80211com_media_change, ieee80211com_media_status); 1118170530Ssam /* NB: strip explicit mode; we're actually in autoselect */ 1119170530Ssam ifmedia_set(&ic->ic_media, 1120188106Ssam media_status(ic->ic_opmode, ic->ic_curchan) &~ 1121188106Ssam (IFM_MMASK | IFM_IEEE80211_TURBO)); 1122116742Ssam if (maxrate) 1123116742Ssam ifp->if_baudrate = IF_Mbps(maxrate); 1124178354Ssam 1125178354Ssam /* XXX need to propagate new media settings to vap's */ 1126116742Ssam} 1127116742Ssam 1128188782Ssam/* XXX inline or eliminate? */ 1129165569Ssamconst struct ieee80211_rateset * 1130165569Ssamieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c) 1131165569Ssam{ 1132188774Ssam /* XXX does this work for 11ng basic rates? */ 1133170530Ssam return &ic->ic_sup_rates[ieee80211_chan2mode(c)]; 1134165569Ssam} 1135165569Ssam 1136138568Ssamvoid 1137138568Ssamieee80211_announce(struct ieee80211com *ic) 1138138568Ssam{ 1139138568Ssam struct ifnet *ifp = ic->ic_ifp; 1140138568Ssam int i, mode, rate, mword; 1141170530Ssam const struct ieee80211_rateset *rs; 1142138568Ssam 1143172227Ssam /* NB: skip AUTO since it has no rates */ 1144172227Ssam for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) { 1145167468Ssam if (isclr(ic->ic_modecaps, mode)) 1146138568Ssam continue; 1147138568Ssam if_printf(ifp, "%s rates: ", ieee80211_phymode_name[mode]); 1148138568Ssam rs = &ic->ic_sup_rates[mode]; 1149138568Ssam for (i = 0; i < rs->rs_nrates; i++) { 1150170530Ssam mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode); 1151138568Ssam if (mword == 0) 1152138568Ssam continue; 1153170530Ssam rate = ieee80211_media2rate(mword); 1154138568Ssam printf("%s%d%sMbps", (i != 0 ? " " : ""), 1155170530Ssam rate / 2, ((rate & 0x1) != 0 ? ".5" : "")); 1156138568Ssam } 1157138568Ssam printf("\n"); 1158138568Ssam } 1159170530Ssam ieee80211_ht_announce(ic); 1160138568Ssam} 1161138568Ssam 1162170530Ssamvoid 1163170530Ssamieee80211_announce_channels(struct ieee80211com *ic) 1164116742Ssam{ 1165170530Ssam const struct ieee80211_channel *c; 1166170530Ssam char type; 1167170530Ssam int i, cw; 1168170530Ssam 1169170530Ssam printf("Chan Freq CW RegPwr MinPwr MaxPwr\n"); 1170170530Ssam for (i = 0; i < ic->ic_nchans; i++) { 1171170530Ssam c = &ic->ic_channels[i]; 1172170530Ssam if (IEEE80211_IS_CHAN_ST(c)) 1173170530Ssam type = 'S'; 1174170530Ssam else if (IEEE80211_IS_CHAN_108A(c)) 1175170530Ssam type = 'T'; 1176170530Ssam else if (IEEE80211_IS_CHAN_108G(c)) 1177170530Ssam type = 'G'; 1178170530Ssam else if (IEEE80211_IS_CHAN_HT(c)) 1179170530Ssam type = 'n'; 1180170530Ssam else if (IEEE80211_IS_CHAN_A(c)) 1181170530Ssam type = 'a'; 1182170530Ssam else if (IEEE80211_IS_CHAN_ANYG(c)) 1183170530Ssam type = 'g'; 1184170530Ssam else if (IEEE80211_IS_CHAN_B(c)) 1185170530Ssam type = 'b'; 1186170530Ssam else 1187170530Ssam type = 'f'; 1188170530Ssam if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c)) 1189170530Ssam cw = 40; 1190170530Ssam else if (IEEE80211_IS_CHAN_HALF(c)) 1191170530Ssam cw = 10; 1192170530Ssam else if (IEEE80211_IS_CHAN_QUARTER(c)) 1193170530Ssam cw = 5; 1194170530Ssam else 1195170530Ssam cw = 20; 1196170530Ssam printf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n" 1197170530Ssam , c->ic_ieee, c->ic_freq, type 1198170530Ssam , cw 1199170530Ssam , IEEE80211_IS_CHAN_HT40U(c) ? '+' : 1200170530Ssam IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' ' 1201170530Ssam , c->ic_maxregpower 1202170530Ssam , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0 1203170530Ssam , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0 1204170530Ssam ); 1205170530Ssam } 1206116742Ssam} 1207116742Ssam 1208170530Ssamstatic int 1209184273Ssammedia2mode(const struct ifmedia_entry *ime, uint32_t flags, uint16_t *mode) 1210170530Ssam{ 1211116742Ssam switch (IFM_MODE(ime->ifm_media)) { 1212116742Ssam case IFM_IEEE80211_11A: 1213178354Ssam *mode = IEEE80211_MODE_11A; 1214116742Ssam break; 1215116742Ssam case IFM_IEEE80211_11B: 1216178354Ssam *mode = IEEE80211_MODE_11B; 1217116742Ssam break; 1218116742Ssam case IFM_IEEE80211_11G: 1219178354Ssam *mode = IEEE80211_MODE_11G; 1220116742Ssam break; 1221124543Sonoe case IFM_IEEE80211_FH: 1222178354Ssam *mode = IEEE80211_MODE_FH; 1223124543Sonoe break; 1224170530Ssam case IFM_IEEE80211_11NA: 1225178354Ssam *mode = IEEE80211_MODE_11NA; 1226170530Ssam break; 1227170530Ssam case IFM_IEEE80211_11NG: 1228178354Ssam *mode = IEEE80211_MODE_11NG; 1229170530Ssam break; 1230116742Ssam case IFM_AUTO: 1231178354Ssam *mode = IEEE80211_MODE_AUTO; 1232116742Ssam break; 1233116742Ssam default: 1234178354Ssam return 0; 1235116742Ssam } 1236116742Ssam /* 1237138568Ssam * Turbo mode is an ``option''. 1238138568Ssam * XXX does not apply to AUTO 1239116742Ssam */ 1240116742Ssam if (ime->ifm_media & IFM_IEEE80211_TURBO) { 1241178354Ssam if (*mode == IEEE80211_MODE_11A) { 1242184273Ssam if (flags & IEEE80211_F_TURBOP) 1243178354Ssam *mode = IEEE80211_MODE_TURBO_A; 1244170530Ssam else 1245178354Ssam *mode = IEEE80211_MODE_STURBO_A; 1246178354Ssam } else if (*mode == IEEE80211_MODE_11G) 1247178354Ssam *mode = IEEE80211_MODE_TURBO_G; 1248138568Ssam else 1249178354Ssam return 0; 1250116742Ssam } 1251170530Ssam /* XXX HT40 +/- */ 1252178354Ssam return 1; 1253178354Ssam} 1254116742Ssam 1255178354Ssam/* 1256184273Ssam * Handle a media change request on the underlying interface. 1257178354Ssam */ 1258178354Ssamint 1259178354Ssamieee80211com_media_change(struct ifnet *ifp) 1260178354Ssam{ 1261184273Ssam return EINVAL; 1262178354Ssam} 1263116742Ssam 1264178354Ssam/* 1265178354Ssam * Handle a media change request on the vap interface. 1266178354Ssam */ 1267178354Ssamint 1268178354Ssamieee80211_media_change(struct ifnet *ifp) 1269178354Ssam{ 1270178354Ssam struct ieee80211vap *vap = ifp->if_softc; 1271178354Ssam struct ifmedia_entry *ime = vap->iv_media.ifm_cur; 1272184273Ssam uint16_t newmode; 1273178354Ssam 1274184273Ssam if (!media2mode(ime, vap->iv_flags, &newmode)) 1275178354Ssam return EINVAL; 1276184273Ssam if (vap->iv_des_mode != newmode) { 1277184273Ssam vap->iv_des_mode = newmode; 1278193340Ssam /* XXX kick state machine if up+running */ 1279178354Ssam } 1280178354Ssam return 0; 1281116742Ssam} 1282116742Ssam 1283170530Ssam/* 1284170530Ssam * Common code to calculate the media status word 1285170530Ssam * from the operating mode and channel state. 1286170530Ssam */ 1287170530Ssamstatic int 1288170530Ssammedia_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan) 1289170530Ssam{ 1290170530Ssam int status; 1291170530Ssam 1292170530Ssam status = IFM_IEEE80211; 1293170530Ssam switch (opmode) { 1294170530Ssam case IEEE80211_M_STA: 1295170530Ssam break; 1296170530Ssam case IEEE80211_M_IBSS: 1297170530Ssam status |= IFM_IEEE80211_ADHOC; 1298170530Ssam break; 1299170530Ssam case IEEE80211_M_HOSTAP: 1300170530Ssam status |= IFM_IEEE80211_HOSTAP; 1301170530Ssam break; 1302170530Ssam case IEEE80211_M_MONITOR: 1303170530Ssam status |= IFM_IEEE80211_MONITOR; 1304170530Ssam break; 1305170530Ssam case IEEE80211_M_AHDEMO: 1306170530Ssam status |= IFM_IEEE80211_ADHOC | IFM_FLAG0; 1307170530Ssam break; 1308170530Ssam case IEEE80211_M_WDS: 1309178354Ssam status |= IFM_IEEE80211_WDS; 1310170530Ssam break; 1311195618Srpaulo case IEEE80211_M_MBSS: 1312195618Srpaulo status |= IFM_IEEE80211_MBSS; 1313195618Srpaulo break; 1314170530Ssam } 1315170530Ssam if (IEEE80211_IS_CHAN_HTA(chan)) { 1316170530Ssam status |= IFM_IEEE80211_11NA; 1317170530Ssam } else if (IEEE80211_IS_CHAN_HTG(chan)) { 1318170530Ssam status |= IFM_IEEE80211_11NG; 1319170530Ssam } else if (IEEE80211_IS_CHAN_A(chan)) { 1320170530Ssam status |= IFM_IEEE80211_11A; 1321170530Ssam } else if (IEEE80211_IS_CHAN_B(chan)) { 1322170530Ssam status |= IFM_IEEE80211_11B; 1323170530Ssam } else if (IEEE80211_IS_CHAN_ANYG(chan)) { 1324170530Ssam status |= IFM_IEEE80211_11G; 1325170530Ssam } else if (IEEE80211_IS_CHAN_FHSS(chan)) { 1326170530Ssam status |= IFM_IEEE80211_FH; 1327170530Ssam } 1328170530Ssam /* XXX else complain? */ 1329170530Ssam 1330170530Ssam if (IEEE80211_IS_CHAN_TURBO(chan)) 1331170530Ssam status |= IFM_IEEE80211_TURBO; 1332178354Ssam#if 0 1333178354Ssam if (IEEE80211_IS_CHAN_HT20(chan)) 1334178354Ssam status |= IFM_IEEE80211_HT20; 1335178354Ssam if (IEEE80211_IS_CHAN_HT40(chan)) 1336178354Ssam status |= IFM_IEEE80211_HT40; 1337178354Ssam#endif 1338170530Ssam return status; 1339170530Ssam} 1340170530Ssam 1341178354Ssamstatic void 1342178354Ssamieee80211com_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1343178354Ssam{ 1344178354Ssam struct ieee80211com *ic = ifp->if_l2com; 1345178354Ssam struct ieee80211vap *vap; 1346178354Ssam 1347178354Ssam imr->ifm_status = IFM_AVALID; 1348178354Ssam TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1349178354Ssam if (vap->iv_ifp->if_flags & IFF_UP) { 1350178354Ssam imr->ifm_status |= IFM_ACTIVE; 1351178354Ssam break; 1352178354Ssam } 1353178354Ssam imr->ifm_active = media_status(ic->ic_opmode, ic->ic_curchan); 1354178354Ssam if (imr->ifm_status & IFM_ACTIVE) 1355178354Ssam imr->ifm_current = imr->ifm_active; 1356178354Ssam} 1357178354Ssam 1358116742Ssamvoid 1359116742Ssamieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr) 1360116742Ssam{ 1361178354Ssam struct ieee80211vap *vap = ifp->if_softc; 1362178354Ssam struct ieee80211com *ic = vap->iv_ic; 1363170530Ssam enum ieee80211_phymode mode; 1364116742Ssam 1365116742Ssam imr->ifm_status = IFM_AVALID; 1366170530Ssam /* 1367170530Ssam * NB: use the current channel's mode to lock down a xmit 1368170530Ssam * rate only when running; otherwise we may have a mismatch 1369170530Ssam * in which case the rate will not be convertible. 1370170530Ssam */ 1371178354Ssam if (vap->iv_state == IEEE80211_S_RUN) { 1372116742Ssam imr->ifm_status |= IFM_ACTIVE; 1373170530Ssam mode = ieee80211_chan2mode(ic->ic_curchan); 1374170530Ssam } else 1375170530Ssam mode = IEEE80211_MODE_AUTO; 1376178354Ssam imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan); 1377138568Ssam /* 1378138568Ssam * Calculate a current rate if possible. 1379138568Ssam */ 1380178354Ssam if (vap->iv_txparms[mode].ucastrate != IEEE80211_FIXED_RATE_NONE) { 1381138568Ssam /* 1382138568Ssam * A fixed rate is set, report that. 1383138568Ssam */ 1384138568Ssam imr->ifm_active |= ieee80211_rate2media(ic, 1385178354Ssam vap->iv_txparms[mode].ucastrate, mode); 1386178354Ssam } else if (vap->iv_opmode == IEEE80211_M_STA) { 1387138568Ssam /* 1388138568Ssam * In station mode report the current transmit rate. 1389138568Ssam */ 1390138568Ssam imr->ifm_active |= ieee80211_rate2media(ic, 1391178354Ssam vap->iv_bss->ni_txrate, mode); 1392128966Sandre } else 1393138568Ssam imr->ifm_active |= IFM_AUTO; 1394178354Ssam if (imr->ifm_status & IFM_ACTIVE) 1395178354Ssam imr->ifm_current = imr->ifm_active; 1396116742Ssam} 1397116742Ssam 1398116742Ssam/* 1399116742Ssam * Set the current phy mode and recalculate the active channel 1400116742Ssam * set based on the available channels for this mode. Also 1401116742Ssam * select a new default/current channel if the current one is 1402116742Ssam * inappropriate for this mode. 1403116742Ssam */ 1404116742Ssamint 1405116742Ssamieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode) 1406116742Ssam{ 1407116742Ssam /* 1408166012Ssam * Adjust basic rates in 11b/11g supported rate set. 1409166012Ssam * Note that if operating on a hal/quarter rate channel 1410166012Ssam * this is a noop as those rates sets are different 1411166012Ssam * and used instead. 1412116742Ssam */ 1413166012Ssam if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B) 1414178354Ssam ieee80211_setbasicrates(&ic->ic_sup_rates[mode], mode); 1415166012Ssam 1416116742Ssam ic->ic_curmode = mode; 1417138568Ssam ieee80211_reset_erp(ic); /* reset ERP state */ 1418138568Ssam 1419116742Ssam return 0; 1420116742Ssam} 1421116742Ssam 1422116742Ssam/* 1423170530Ssam * Return the phy mode for with the specified channel. 1424116742Ssam */ 1425116742Ssamenum ieee80211_phymode 1426170530Ssamieee80211_chan2mode(const struct ieee80211_channel *chan) 1427116742Ssam{ 1428170530Ssam 1429170530Ssam if (IEEE80211_IS_CHAN_HTA(chan)) 1430170530Ssam return IEEE80211_MODE_11NA; 1431170530Ssam else if (IEEE80211_IS_CHAN_HTG(chan)) 1432170530Ssam return IEEE80211_MODE_11NG; 1433170530Ssam else if (IEEE80211_IS_CHAN_108G(chan)) 1434170530Ssam return IEEE80211_MODE_TURBO_G; 1435170530Ssam else if (IEEE80211_IS_CHAN_ST(chan)) 1436170530Ssam return IEEE80211_MODE_STURBO_A; 1437170530Ssam else if (IEEE80211_IS_CHAN_TURBO(chan)) 1438153350Ssam return IEEE80211_MODE_TURBO_A; 1439188782Ssam else if (IEEE80211_IS_CHAN_HALF(chan)) 1440188782Ssam return IEEE80211_MODE_HALF; 1441188782Ssam else if (IEEE80211_IS_CHAN_QUARTER(chan)) 1442188782Ssam return IEEE80211_MODE_QUARTER; 1443170530Ssam else if (IEEE80211_IS_CHAN_A(chan)) 1444116742Ssam return IEEE80211_MODE_11A; 1445170530Ssam else if (IEEE80211_IS_CHAN_ANYG(chan)) 1446116742Ssam return IEEE80211_MODE_11G; 1447170530Ssam else if (IEEE80211_IS_CHAN_B(chan)) 1448116742Ssam return IEEE80211_MODE_11B; 1449170530Ssam else if (IEEE80211_IS_CHAN_FHSS(chan)) 1450170530Ssam return IEEE80211_MODE_FH; 1451170530Ssam 1452170530Ssam /* NB: should not get here */ 1453170530Ssam printf("%s: cannot map channel to mode; freq %u flags 0x%x\n", 1454170530Ssam __func__, chan->ic_freq, chan->ic_flags); 1455170530Ssam return IEEE80211_MODE_11B; 1456116742Ssam} 1457116742Ssam 1458170530Ssamstruct ratemedia { 1459170530Ssam u_int match; /* rate + mode */ 1460170530Ssam u_int media; /* if_media rate */ 1461170530Ssam}; 1462170530Ssam 1463170530Ssamstatic int 1464170530Ssamfindmedia(const struct ratemedia rates[], int n, u_int match) 1465170530Ssam{ 1466170530Ssam int i; 1467170530Ssam 1468170530Ssam for (i = 0; i < n; i++) 1469170530Ssam if (rates[i].match == match) 1470170530Ssam return rates[i].media; 1471170530Ssam return IFM_AUTO; 1472170530Ssam} 1473170530Ssam 1474116742Ssam/* 1475170530Ssam * Convert IEEE80211 rate value to ifmedia subtype. 1476170530Ssam * Rate is either a legacy rate in units of 0.5Mbps 1477170530Ssam * or an MCS index. 1478116742Ssam */ 1479116742Ssamint 1480116742Ssamieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode) 1481116742Ssam{ 1482116742Ssam#define N(a) (sizeof(a) / sizeof(a[0])) 1483170530Ssam static const struct ratemedia rates[] = { 1484124543Sonoe { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 }, 1485124543Sonoe { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 }, 1486124543Sonoe { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 }, 1487124543Sonoe { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 }, 1488124543Sonoe { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 }, 1489124543Sonoe { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 }, 1490124543Sonoe { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 }, 1491124543Sonoe { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 }, 1492124543Sonoe { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 }, 1493124543Sonoe { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 }, 1494124543Sonoe { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 }, 1495124543Sonoe { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 }, 1496124543Sonoe { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 }, 1497124543Sonoe { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 }, 1498124543Sonoe { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 }, 1499124543Sonoe { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 }, 1500124543Sonoe { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 }, 1501124543Sonoe { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 }, 1502124543Sonoe { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 }, 1503124543Sonoe { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 }, 1504124543Sonoe { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 }, 1505124543Sonoe { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 }, 1506124543Sonoe { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 }, 1507124543Sonoe { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 }, 1508124543Sonoe { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 }, 1509124543Sonoe { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 }, 1510124543Sonoe { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 }, 1511165569Ssam { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 }, 1512165569Ssam { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 }, 1513165569Ssam { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 }, 1514116742Ssam /* NB: OFDM72 doesn't realy exist so we don't handle it */ 1515116742Ssam }; 1516170530Ssam static const struct ratemedia htrates[] = { 1517170530Ssam { 0, IFM_IEEE80211_MCS }, 1518170530Ssam { 1, IFM_IEEE80211_MCS }, 1519170530Ssam { 2, IFM_IEEE80211_MCS }, 1520170530Ssam { 3, IFM_IEEE80211_MCS }, 1521170530Ssam { 4, IFM_IEEE80211_MCS }, 1522170530Ssam { 5, IFM_IEEE80211_MCS }, 1523170530Ssam { 6, IFM_IEEE80211_MCS }, 1524170530Ssam { 7, IFM_IEEE80211_MCS }, 1525170530Ssam { 8, IFM_IEEE80211_MCS }, 1526170530Ssam { 9, IFM_IEEE80211_MCS }, 1527170530Ssam { 10, IFM_IEEE80211_MCS }, 1528170530Ssam { 11, IFM_IEEE80211_MCS }, 1529170530Ssam { 12, IFM_IEEE80211_MCS }, 1530170530Ssam { 13, IFM_IEEE80211_MCS }, 1531170530Ssam { 14, IFM_IEEE80211_MCS }, 1532170530Ssam { 15, IFM_IEEE80211_MCS }, 1533219456Sbschmidt { 16, IFM_IEEE80211_MCS }, 1534219456Sbschmidt { 17, IFM_IEEE80211_MCS }, 1535219456Sbschmidt { 18, IFM_IEEE80211_MCS }, 1536219456Sbschmidt { 19, IFM_IEEE80211_MCS }, 1537219456Sbschmidt { 20, IFM_IEEE80211_MCS }, 1538219456Sbschmidt { 21, IFM_IEEE80211_MCS }, 1539219456Sbschmidt { 22, IFM_IEEE80211_MCS }, 1540219456Sbschmidt { 23, IFM_IEEE80211_MCS }, 1541219456Sbschmidt { 24, IFM_IEEE80211_MCS }, 1542219456Sbschmidt { 25, IFM_IEEE80211_MCS }, 1543219456Sbschmidt { 26, IFM_IEEE80211_MCS }, 1544219456Sbschmidt { 27, IFM_IEEE80211_MCS }, 1545219456Sbschmidt { 28, IFM_IEEE80211_MCS }, 1546219456Sbschmidt { 29, IFM_IEEE80211_MCS }, 1547219456Sbschmidt { 30, IFM_IEEE80211_MCS }, 1548219456Sbschmidt { 31, IFM_IEEE80211_MCS }, 1549219456Sbschmidt { 32, IFM_IEEE80211_MCS }, 1550219456Sbschmidt { 33, IFM_IEEE80211_MCS }, 1551219456Sbschmidt { 34, IFM_IEEE80211_MCS }, 1552219456Sbschmidt { 35, IFM_IEEE80211_MCS }, 1553219456Sbschmidt { 36, IFM_IEEE80211_MCS }, 1554219456Sbschmidt { 37, IFM_IEEE80211_MCS }, 1555219456Sbschmidt { 38, IFM_IEEE80211_MCS }, 1556219456Sbschmidt { 39, IFM_IEEE80211_MCS }, 1557219456Sbschmidt { 40, IFM_IEEE80211_MCS }, 1558219456Sbschmidt { 41, IFM_IEEE80211_MCS }, 1559219456Sbschmidt { 42, IFM_IEEE80211_MCS }, 1560219456Sbschmidt { 43, IFM_IEEE80211_MCS }, 1561219456Sbschmidt { 44, IFM_IEEE80211_MCS }, 1562219456Sbschmidt { 45, IFM_IEEE80211_MCS }, 1563219456Sbschmidt { 46, IFM_IEEE80211_MCS }, 1564219456Sbschmidt { 47, IFM_IEEE80211_MCS }, 1565219456Sbschmidt { 48, IFM_IEEE80211_MCS }, 1566219456Sbschmidt { 49, IFM_IEEE80211_MCS }, 1567219456Sbschmidt { 50, IFM_IEEE80211_MCS }, 1568219456Sbschmidt { 51, IFM_IEEE80211_MCS }, 1569219456Sbschmidt { 52, IFM_IEEE80211_MCS }, 1570219456Sbschmidt { 53, IFM_IEEE80211_MCS }, 1571219456Sbschmidt { 54, IFM_IEEE80211_MCS }, 1572219456Sbschmidt { 55, IFM_IEEE80211_MCS }, 1573219456Sbschmidt { 56, IFM_IEEE80211_MCS }, 1574219456Sbschmidt { 57, IFM_IEEE80211_MCS }, 1575219456Sbschmidt { 58, IFM_IEEE80211_MCS }, 1576219456Sbschmidt { 59, IFM_IEEE80211_MCS }, 1577219456Sbschmidt { 60, IFM_IEEE80211_MCS }, 1578219456Sbschmidt { 61, IFM_IEEE80211_MCS }, 1579219456Sbschmidt { 62, IFM_IEEE80211_MCS }, 1580219456Sbschmidt { 63, IFM_IEEE80211_MCS }, 1581219456Sbschmidt { 64, IFM_IEEE80211_MCS }, 1582219456Sbschmidt { 65, IFM_IEEE80211_MCS }, 1583219456Sbschmidt { 66, IFM_IEEE80211_MCS }, 1584219456Sbschmidt { 67, IFM_IEEE80211_MCS }, 1585219456Sbschmidt { 68, IFM_IEEE80211_MCS }, 1586219456Sbschmidt { 69, IFM_IEEE80211_MCS }, 1587219456Sbschmidt { 70, IFM_IEEE80211_MCS }, 1588219456Sbschmidt { 71, IFM_IEEE80211_MCS }, 1589219456Sbschmidt { 72, IFM_IEEE80211_MCS }, 1590219456Sbschmidt { 73, IFM_IEEE80211_MCS }, 1591219456Sbschmidt { 74, IFM_IEEE80211_MCS }, 1592219456Sbschmidt { 75, IFM_IEEE80211_MCS }, 1593219456Sbschmidt { 76, IFM_IEEE80211_MCS }, 1594170530Ssam }; 1595170530Ssam int m; 1596116742Ssam 1597170530Ssam /* 1598170530Ssam * Check 11n rates first for match as an MCS. 1599170530Ssam */ 1600170530Ssam if (mode == IEEE80211_MODE_11NA) { 1601172226Ssam if (rate & IEEE80211_RATE_MCS) { 1602172226Ssam rate &= ~IEEE80211_RATE_MCS; 1603170530Ssam m = findmedia(htrates, N(htrates), rate); 1604170530Ssam if (m != IFM_AUTO) 1605170530Ssam return m | IFM_IEEE80211_11NA; 1606170530Ssam } 1607170530Ssam } else if (mode == IEEE80211_MODE_11NG) { 1608170530Ssam /* NB: 12 is ambiguous, it will be treated as an MCS */ 1609172226Ssam if (rate & IEEE80211_RATE_MCS) { 1610172226Ssam rate &= ~IEEE80211_RATE_MCS; 1611170530Ssam m = findmedia(htrates, N(htrates), rate); 1612170530Ssam if (m != IFM_AUTO) 1613170530Ssam return m | IFM_IEEE80211_11NG; 1614170530Ssam } 1615170530Ssam } 1616170530Ssam rate &= IEEE80211_RATE_VAL; 1617116742Ssam switch (mode) { 1618116742Ssam case IEEE80211_MODE_11A: 1619188782Ssam case IEEE80211_MODE_HALF: /* XXX good 'nuf */ 1620188782Ssam case IEEE80211_MODE_QUARTER: 1621170530Ssam case IEEE80211_MODE_11NA: 1622138568Ssam case IEEE80211_MODE_TURBO_A: 1623170530Ssam case IEEE80211_MODE_STURBO_A: 1624170530Ssam return findmedia(rates, N(rates), rate | IFM_IEEE80211_11A); 1625116742Ssam case IEEE80211_MODE_11B: 1626170530Ssam return findmedia(rates, N(rates), rate | IFM_IEEE80211_11B); 1627124543Sonoe case IEEE80211_MODE_FH: 1628170530Ssam return findmedia(rates, N(rates), rate | IFM_IEEE80211_FH); 1629116742Ssam case IEEE80211_MODE_AUTO: 1630116742Ssam /* NB: ic may be NULL for some drivers */ 1631188775Ssam if (ic != NULL && ic->ic_phytype == IEEE80211_T_FH) 1632170530Ssam return findmedia(rates, N(rates), 1633170530Ssam rate | IFM_IEEE80211_FH); 1634116742Ssam /* NB: hack, 11g matches both 11b+11a rates */ 1635116742Ssam /* fall thru... */ 1636116742Ssam case IEEE80211_MODE_11G: 1637170530Ssam case IEEE80211_MODE_11NG: 1638138568Ssam case IEEE80211_MODE_TURBO_G: 1639170530Ssam return findmedia(rates, N(rates), rate | IFM_IEEE80211_11G); 1640116742Ssam } 1641116742Ssam return IFM_AUTO; 1642116742Ssam#undef N 1643116742Ssam} 1644116742Ssam 1645116742Ssamint 1646116742Ssamieee80211_media2rate(int mword) 1647116742Ssam{ 1648116742Ssam#define N(a) (sizeof(a) / sizeof(a[0])) 1649116742Ssam static const int ieeerates[] = { 1650116742Ssam -1, /* IFM_AUTO */ 1651116742Ssam 0, /* IFM_MANUAL */ 1652116742Ssam 0, /* IFM_NONE */ 1653116742Ssam 2, /* IFM_IEEE80211_FH1 */ 1654116742Ssam 4, /* IFM_IEEE80211_FH2 */ 1655116742Ssam 2, /* IFM_IEEE80211_DS1 */ 1656116742Ssam 4, /* IFM_IEEE80211_DS2 */ 1657116742Ssam 11, /* IFM_IEEE80211_DS5 */ 1658116742Ssam 22, /* IFM_IEEE80211_DS11 */ 1659116742Ssam 44, /* IFM_IEEE80211_DS22 */ 1660116742Ssam 12, /* IFM_IEEE80211_OFDM6 */ 1661116742Ssam 18, /* IFM_IEEE80211_OFDM9 */ 1662116742Ssam 24, /* IFM_IEEE80211_OFDM12 */ 1663116742Ssam 36, /* IFM_IEEE80211_OFDM18 */ 1664116742Ssam 48, /* IFM_IEEE80211_OFDM24 */ 1665116742Ssam 72, /* IFM_IEEE80211_OFDM36 */ 1666116742Ssam 96, /* IFM_IEEE80211_OFDM48 */ 1667116742Ssam 108, /* IFM_IEEE80211_OFDM54 */ 1668116742Ssam 144, /* IFM_IEEE80211_OFDM72 */ 1669165569Ssam 0, /* IFM_IEEE80211_DS354k */ 1670165569Ssam 0, /* IFM_IEEE80211_DS512k */ 1671165569Ssam 6, /* IFM_IEEE80211_OFDM3 */ 1672165569Ssam 9, /* IFM_IEEE80211_OFDM4 */ 1673165569Ssam 54, /* IFM_IEEE80211_OFDM27 */ 1674170530Ssam -1, /* IFM_IEEE80211_MCS */ 1675116742Ssam }; 1676116742Ssam return IFM_SUBTYPE(mword) < N(ieeerates) ? 1677116742Ssam ieeerates[IFM_SUBTYPE(mword)] : 0; 1678116742Ssam#undef N 1679116742Ssam} 1680195379Ssam 1681195379Ssam/* 1682195379Ssam * The following hash function is adapted from "Hash Functions" by Bob Jenkins 1683195379Ssam * ("Algorithm Alley", Dr. Dobbs Journal, September 1997). 1684195379Ssam */ 1685195379Ssam#define mix(a, b, c) \ 1686195379Ssamdo { \ 1687195379Ssam a -= b; a -= c; a ^= (c >> 13); \ 1688195379Ssam b -= c; b -= a; b ^= (a << 8); \ 1689195379Ssam c -= a; c -= b; c ^= (b >> 13); \ 1690195379Ssam a -= b; a -= c; a ^= (c >> 12); \ 1691195379Ssam b -= c; b -= a; b ^= (a << 16); \ 1692195379Ssam c -= a; c -= b; c ^= (b >> 5); \ 1693195379Ssam a -= b; a -= c; a ^= (c >> 3); \ 1694195379Ssam b -= c; b -= a; b ^= (a << 10); \ 1695195379Ssam c -= a; c -= b; c ^= (b >> 15); \ 1696195379Ssam} while (/*CONSTCOND*/0) 1697195379Ssam 1698195379Ssamuint32_t 1699195379Ssamieee80211_mac_hash(const struct ieee80211com *ic, 1700195379Ssam const uint8_t addr[IEEE80211_ADDR_LEN]) 1701195379Ssam{ 1702195379Ssam uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = ic->ic_hash_key; 1703195379Ssam 1704195379Ssam b += addr[5] << 8; 1705195379Ssam b += addr[4]; 1706195379Ssam a += addr[3] << 24; 1707195379Ssam a += addr[2] << 16; 1708195379Ssam a += addr[1] << 8; 1709195379Ssam a += addr[0]; 1710195379Ssam 1711195379Ssam mix(a, b, c); 1712195379Ssam 1713195379Ssam return c; 1714195379Ssam} 1715195379Ssam#undef mix 1716