2 * Copyright (c) 2001 Atsushi Onoe
3 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
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.
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.
26 * $FreeBSD: head/sys/net80211/ieee80211.c 206358 2010-04-07 15:29:13Z rpaulo $
31 * IEEE 802.11 generic handler
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/kernel.h>
39 #include <sys/socket.h>
40 #include <sys/thread.h>
43 #include <net/if_dl.h>
44 #include <net/if_media.h>
45 #include <net/if_types.h>
46 #include <net/ifq_var.h>
47 #include <net/ethernet.h>
48 #include <net/route.h>
50 #include <netproto/802_11/ieee80211_var.h>
51 #include <netproto/802_11/ieee80211_regdomain.h>
52 #ifdef IEEE80211_SUPPORT_SUPERG
53 #include <netproto/802_11/ieee80211_superg.h>
55 #include <netproto/802_11/ieee80211_ratectl.h>
59 const char *ieee80211_phymode_name[IEEE80211_MODE_MAX] = {
60 [IEEE80211_MODE_AUTO] = "auto",
61 [IEEE80211_MODE_11A] = "11a",
62 [IEEE80211_MODE_11B] = "11b",
63 [IEEE80211_MODE_11G] = "11g",
64 [IEEE80211_MODE_FH] = "FH",
65 [IEEE80211_MODE_TURBO_A] = "turboA",
66 [IEEE80211_MODE_TURBO_G] = "turboG",
67 [IEEE80211_MODE_STURBO_A] = "sturboA",
68 [IEEE80211_MODE_HALF] = "half",
69 [IEEE80211_MODE_QUARTER] = "quarter",
70 [IEEE80211_MODE_11NA] = "11na",
71 [IEEE80211_MODE_11NG] = "11ng",
73 /* map ieee80211_opmode to the corresponding capability bit */
74 const int ieee80211_opcap[IEEE80211_OPMODE_MAX] = {
75 [IEEE80211_M_IBSS] = IEEE80211_C_IBSS,
76 [IEEE80211_M_WDS] = IEEE80211_C_WDS,
77 [IEEE80211_M_STA] = IEEE80211_C_STA,
78 [IEEE80211_M_AHDEMO] = IEEE80211_C_AHDEMO,
79 [IEEE80211_M_HOSTAP] = IEEE80211_C_HOSTAP,
80 [IEEE80211_M_MONITOR] = IEEE80211_C_MONITOR,
81 #ifdef IEEE80211_SUPPORT_MESH
82 [IEEE80211_M_MBSS] = IEEE80211_C_MBSS,
86 static const uint8_t ieee80211broadcastaddr[IEEE80211_ADDR_LEN] =
87 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
89 static void ieee80211_syncflag_locked(struct ieee80211com *ic, int flag);
90 static void ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag);
91 static void ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag);
92 static int ieee80211_media_setup(struct ieee80211com *ic,
93 struct ifmedia *media, int caps, int addsta,
94 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat);
95 static void ieee80211com_media_status(struct ifnet *, struct ifmediareq *);
96 static int ieee80211com_media_change(struct ifnet *);
97 static int media_status(enum ieee80211_opmode,
98 const struct ieee80211_channel *);
100 MALLOC_DEFINE(M_80211_VAP, "80211vap", "802.11 vap state");
103 * Default supported rates for 802.11 operation (in IEEE .5Mb units).
105 #define B(r) ((r) | IEEE80211_RATE_BASIC)
106 static const struct ieee80211_rateset ieee80211_rateset_11a =
107 { 8, { B(12), 18, B(24), 36, B(48), 72, 96, 108 } };
108 static const struct ieee80211_rateset ieee80211_rateset_half =
109 { 8, { B(6), 9, B(12), 18, B(24), 36, 48, 54 } };
110 static const struct ieee80211_rateset ieee80211_rateset_quarter =
111 { 8, { B(3), 4, B(6), 9, B(12), 18, 24, 27 } };
112 static const struct ieee80211_rateset ieee80211_rateset_11b =
113 { 4, { B(2), B(4), B(11), B(22) } };
114 /* NB: OFDM rates are handled specially based on mode */
115 static const struct ieee80211_rateset ieee80211_rateset_11g =
116 { 12, { B(2), B(4), B(11), B(22), 12, 18, 24, 36, 48, 72, 96, 108 } };
119 /* Global token used for wlan layer and wireless NIC driver layer */
120 lwkt_token wlan_token;
123 * Fill in 802.11 available channel set, mark
124 * all available channels as active, and pick
125 * a default channel if not already specified.
128 ieee80211_chan_init(struct ieee80211com *ic)
130 #define DEFAULTRATES(m, def) do { \
131 if (ic->ic_sup_rates[m].rs_nrates == 0) \
132 ic->ic_sup_rates[m] = def; \
134 struct ieee80211_channel *c;
137 KASSERT(0 < ic->ic_nchans && ic->ic_nchans <= IEEE80211_CHAN_MAX,
138 ("invalid number of channels specified: %u", ic->ic_nchans));
139 memset(ic->ic_chan_avail, 0, sizeof(ic->ic_chan_avail));
140 memset(ic->ic_modecaps, 0, sizeof(ic->ic_modecaps));
141 setbit(ic->ic_modecaps, IEEE80211_MODE_AUTO);
142 for (i = 0; i < ic->ic_nchans; i++) {
143 c = &ic->ic_channels[i];
144 KASSERT(c->ic_flags != 0, ("channel with no flags"));
146 * Help drivers that work only with frequencies by filling
147 * in IEEE channel #'s if not already calculated. Note this
148 * mimics similar work done in ieee80211_setregdomain when
149 * changing regulatory state.
152 c->ic_ieee = ieee80211_mhz2ieee(c->ic_freq,c->ic_flags);
153 if (IEEE80211_IS_CHAN_HT40(c) && c->ic_extieee == 0)
154 c->ic_extieee = ieee80211_mhz2ieee(c->ic_freq +
155 (IEEE80211_IS_CHAN_HT40U(c) ? 20 : -20),
157 /* default max tx power to max regulatory */
158 if (c->ic_maxpower == 0)
159 c->ic_maxpower = 2*c->ic_maxregpower;
160 setbit(ic->ic_chan_avail, c->ic_ieee);
162 * Identify mode capabilities.
164 if (IEEE80211_IS_CHAN_A(c))
165 setbit(ic->ic_modecaps, IEEE80211_MODE_11A);
166 if (IEEE80211_IS_CHAN_B(c))
167 setbit(ic->ic_modecaps, IEEE80211_MODE_11B);
168 if (IEEE80211_IS_CHAN_ANYG(c))
169 setbit(ic->ic_modecaps, IEEE80211_MODE_11G);
170 if (IEEE80211_IS_CHAN_FHSS(c))
171 setbit(ic->ic_modecaps, IEEE80211_MODE_FH);
172 if (IEEE80211_IS_CHAN_108A(c))
173 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_A);
174 if (IEEE80211_IS_CHAN_108G(c))
175 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_G);
176 if (IEEE80211_IS_CHAN_ST(c))
177 setbit(ic->ic_modecaps, IEEE80211_MODE_STURBO_A);
178 if (IEEE80211_IS_CHAN_HALF(c))
179 setbit(ic->ic_modecaps, IEEE80211_MODE_HALF);
180 if (IEEE80211_IS_CHAN_QUARTER(c))
181 setbit(ic->ic_modecaps, IEEE80211_MODE_QUARTER);
182 if (IEEE80211_IS_CHAN_HTA(c))
183 setbit(ic->ic_modecaps, IEEE80211_MODE_11NA);
184 if (IEEE80211_IS_CHAN_HTG(c))
185 setbit(ic->ic_modecaps, IEEE80211_MODE_11NG);
187 /* initialize candidate channels to all available */
188 memcpy(ic->ic_chan_active, ic->ic_chan_avail,
189 sizeof(ic->ic_chan_avail));
191 /* sort channel table to allow lookup optimizations */
192 ieee80211_sort_channels(ic->ic_channels, ic->ic_nchans);
194 /* invalidate any previous state */
195 ic->ic_bsschan = IEEE80211_CHAN_ANYC;
196 ic->ic_prevchan = NULL;
197 ic->ic_csa_newchan = NULL;
198 /* arbitrarily pick the first channel */
199 ic->ic_curchan = &ic->ic_channels[0];
200 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
202 /* fillin well-known rate sets if driver has not specified */
203 DEFAULTRATES(IEEE80211_MODE_11B, ieee80211_rateset_11b);
204 DEFAULTRATES(IEEE80211_MODE_11G, ieee80211_rateset_11g);
205 DEFAULTRATES(IEEE80211_MODE_11A, ieee80211_rateset_11a);
206 DEFAULTRATES(IEEE80211_MODE_TURBO_A, ieee80211_rateset_11a);
207 DEFAULTRATES(IEEE80211_MODE_TURBO_G, ieee80211_rateset_11g);
208 DEFAULTRATES(IEEE80211_MODE_STURBO_A, ieee80211_rateset_11a);
209 DEFAULTRATES(IEEE80211_MODE_HALF, ieee80211_rateset_half);
210 DEFAULTRATES(IEEE80211_MODE_QUARTER, ieee80211_rateset_quarter);
211 DEFAULTRATES(IEEE80211_MODE_11NA, ieee80211_rateset_11a);
212 DEFAULTRATES(IEEE80211_MODE_11NG, ieee80211_rateset_11g);
215 * Set auto mode to reset active channel state and any desired channel.
217 (void) ieee80211_setmode(ic, IEEE80211_MODE_AUTO);
222 null_update_mcast(struct ifnet *ifp)
224 if_printf(ifp, "need multicast update callback\n");
228 null_update_promisc(struct ifnet *ifp)
230 if_printf(ifp, "need promiscuous mode update callback\n");
234 null_transmit(struct ifnet *ifp, struct mbuf *m)
238 return EACCES; /* XXX EIO/EPERM? */
242 null_output(struct ifnet *ifp, struct mbuf *m,
243 struct sockaddr *dst, struct rtentry *ro)
245 if_printf(ifp, "discard raw packet\n");
246 return null_transmit(ifp, m);
250 null_input(struct ifnet *ifp, struct mbuf *m)
252 if_printf(ifp, "if_input should not be called\n");
257 * Attach/setup the common net80211 state. Called by
258 * the driver on attach to prior to creating any vap's.
261 ieee80211_ifattach(struct ieee80211com *ic,
262 const uint8_t macaddr[IEEE80211_ADDR_LEN])
264 struct ifnet *ifp = ic->ic_ifp;
265 struct sockaddr_dl *sdl;
268 KASSERT(ifp->if_type == IFT_IEEE80211, ("if_type %d", ifp->if_type));
270 IEEE80211_LOCK_INIT(ic, ifp->if_xname);
271 TAILQ_INIT(&ic->ic_vaps);
273 /* Create a taskqueue for all state changes */
274 ic->ic_tq = taskqueue_create("ic_taskq", M_WAITOK | M_ZERO,
275 taskqueue_thread_enqueue, &ic->ic_tq);
276 taskqueue_start_threads(&ic->ic_tq, 1, TDPRI_KERN_DAEMON, -1,
277 "%s taskq", ifp->if_xname);
279 * Fill in 802.11 available channel set, mark all
280 * available channels as active, and pick a default
281 * channel if not already specified.
283 ieee80211_media_init(ic);
285 ic->ic_update_mcast = null_update_mcast;
286 ic->ic_update_promisc = null_update_promisc;
288 ic->ic_hash_key = karc4random();
289 ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT;
290 ic->ic_lintval = ic->ic_bintval;
291 ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX;
293 ieee80211_crypto_attach(ic);
294 ieee80211_node_attach(ic);
295 ieee80211_power_attach(ic);
296 ieee80211_proto_attach(ic);
297 #ifdef IEEE80211_SUPPORT_SUPERG
298 ieee80211_superg_attach(ic);
300 ieee80211_ht_attach(ic);
301 ieee80211_scan_attach(ic);
302 ieee80211_regdomain_attach(ic);
303 ieee80211_dfs_attach(ic);
305 ieee80211_sysctl_attach(ic);
307 ifp->if_addrlen = IEEE80211_ADDR_LEN;
309 if_attach(ifp, NULL);
310 ifp->if_mtu = IEEE80211_MTU_MAX;
311 ifp->if_broadcastaddr = ieee80211broadcastaddr;
312 ifp->if_output = null_output;
313 ifp->if_input = null_input; /* just in case */
314 ifp->if_resolvemulti = NULL; /* NB: callers check */
316 ifa = ifaddr_byindex(ifp->if_index);
317 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__));
318 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
319 sdl->sdl_type = IFT_ETHER; /* XXX IFT_IEEE80211? */
320 sdl->sdl_alen = IEEE80211_ADDR_LEN;
321 IEEE80211_ADDR_COPY(LLADDR(sdl), macaddr);
326 * Detach net80211 state on device detach. Tear down
327 * all vap's and reclaim all common state prior to the
328 * device state going away. Note we may call back into
329 * driver; it must be prepared for this.
332 ieee80211_ifdetach(struct ieee80211com *ic)
334 struct ifnet *ifp = ic->ic_ifp;
335 struct ieee80211vap *vap;
339 while ((vap = TAILQ_FIRST(&ic->ic_vaps)) != NULL)
340 ieee80211_vap_destroy(vap);
341 ieee80211_waitfor_parent(ic);
343 ieee80211_sysctl_detach(ic);
344 ieee80211_dfs_detach(ic);
345 ieee80211_regdomain_detach(ic);
346 ieee80211_scan_detach(ic);
347 #ifdef IEEE80211_SUPPORT_SUPERG
348 ieee80211_superg_detach(ic);
350 ieee80211_ht_detach(ic);
351 /* NB: must be called before ieee80211_node_detach */
352 ieee80211_proto_detach(ic);
353 ieee80211_crypto_detach(ic);
354 ieee80211_power_detach(ic);
355 ieee80211_node_detach(ic);
357 ifmedia_removeall(&ic->ic_media);
358 taskqueue_free(ic->ic_tq);
359 IEEE80211_LOCK_DESTROY(ic);
363 * Default reset method for use with the ioctl support. This
364 * method is invoked after any state change in the 802.11
365 * layer that should be propagated to the hardware but not
366 * require re-initialization of the 802.11 state machine (e.g
367 * rescanning for an ap). We always return ENETRESET which
368 * should cause the driver to re-initialize the device. Drivers
369 * can override this method to implement more optimized support.
372 default_reset(struct ieee80211vap *vap, u_long cmd)
378 * Prepare a vap for use. Drivers use this call to
379 * setup net80211 state in new vap's prior attaching
380 * them with ieee80211_vap_attach (below).
383 ieee80211_vap_setup(struct ieee80211com *ic, struct ieee80211vap *vap,
384 const char name[IFNAMSIZ], int unit, int opmode, int flags,
385 const uint8_t bssid[IEEE80211_ADDR_LEN],
386 const uint8_t macaddr[IEEE80211_ADDR_LEN])
390 ifp = if_alloc(IFT_IEEE80211);
392 if_printf(ic->ic_ifp, "%s: unable to allocate ifnet\n",
396 if_initname(ifp, name, unit);
397 ifp->if_softc = vap; /* back pointer */
398 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST;
399 ifp->if_start = ieee80211_start;
400 ifp->if_ioctl = ieee80211_ioctl;
401 ifp->if_init = ieee80211_init;
402 /* NB: input+output filled in by ether_ifattach */
403 ifq_set_maxlen(&ifp->if_snd, IFQ_MAXLEN);
404 ifq_set_ready(&ifp->if_snd);
408 vap->iv_flags = ic->ic_flags; /* propagate common flags */
409 vap->iv_flags_ext = ic->ic_flags_ext;
410 vap->iv_flags_ven = ic->ic_flags_ven;
411 vap->iv_caps = ic->ic_caps &~ IEEE80211_C_OPMODE;
412 vap->iv_htcaps = ic->ic_htcaps;
413 vap->iv_opmode = opmode;
414 vap->iv_caps |= ieee80211_opcap[opmode];
416 case IEEE80211_M_WDS:
418 * WDS links must specify the bssid of the far end.
419 * For legacy operation this is a static relationship.
420 * For non-legacy operation the station must associate
421 * and be authorized to pass traffic. Plumbing the
422 * vap to the proper node happens when the vap
423 * transitions to RUN state.
425 IEEE80211_ADDR_COPY(vap->iv_des_bssid, bssid);
426 vap->iv_flags |= IEEE80211_F_DESBSSID;
427 if (flags & IEEE80211_CLONE_WDSLEGACY)
428 vap->iv_flags_ext |= IEEE80211_FEXT_WDSLEGACY;
430 #ifdef IEEE80211_SUPPORT_TDMA
431 case IEEE80211_M_AHDEMO:
432 if (flags & IEEE80211_CLONE_TDMA) {
433 /* NB: checked before clone operation allowed */
434 KASSERT(ic->ic_caps & IEEE80211_C_TDMA,
435 ("not TDMA capable, ic_caps 0x%x", ic->ic_caps));
437 * Propagate TDMA capability to mark vap; this
438 * cannot be removed and is used to distinguish
439 * regular ahdemo operation from ahdemo+tdma.
441 vap->iv_caps |= IEEE80211_C_TDMA;
446 /* auto-enable s/w beacon miss support */
447 if (flags & IEEE80211_CLONE_NOBEACONS)
448 vap->iv_flags_ext |= IEEE80211_FEXT_SWBMISS;
449 /* auto-generated or user supplied MAC address */
450 if (flags & (IEEE80211_CLONE_BSSID|IEEE80211_CLONE_MACADDR))
451 vap->iv_flags_ext |= IEEE80211_FEXT_UNIQMAC;
453 * Enable various functionality by default if we're
454 * capable; the driver can override us if it knows better.
456 if (vap->iv_caps & IEEE80211_C_WME)
457 vap->iv_flags |= IEEE80211_F_WME;
458 if (vap->iv_caps & IEEE80211_C_BURST)
459 vap->iv_flags |= IEEE80211_F_BURST;
460 /* NB: bg scanning only makes sense for station mode right now */
461 if (vap->iv_opmode == IEEE80211_M_STA &&
462 (vap->iv_caps & IEEE80211_C_BGSCAN))
463 vap->iv_flags |= IEEE80211_F_BGSCAN;
464 vap->iv_flags |= IEEE80211_F_DOTH; /* XXX no cap, just ena */
465 /* NB: DFS support only makes sense for ap mode right now */
466 if (vap->iv_opmode == IEEE80211_M_HOSTAP &&
467 (vap->iv_caps & IEEE80211_C_DFS))
468 vap->iv_flags_ext |= IEEE80211_FEXT_DFS;
470 vap->iv_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */
471 vap->iv_bmissthreshold = IEEE80211_HWBMISS_DEFAULT;
472 vap->iv_dtim_period = IEEE80211_DTIM_DEFAULT;
474 * Install a default reset method for the ioctl support;
475 * the driver can override this.
477 vap->iv_reset = default_reset;
479 IEEE80211_ADDR_COPY(vap->iv_myaddr, macaddr);
481 ieee80211_sysctl_vattach(vap);
482 ieee80211_crypto_vattach(vap);
483 ieee80211_node_vattach(vap);
484 ieee80211_power_vattach(vap);
485 ieee80211_proto_vattach(vap);
486 #ifdef IEEE80211_SUPPORT_SUPERG
487 ieee80211_superg_vattach(vap);
489 ieee80211_ht_vattach(vap);
490 ieee80211_scan_vattach(vap);
491 ieee80211_regdomain_vattach(vap);
492 ieee80211_radiotap_vattach(vap);
493 ieee80211_ratectl_set(vap, IEEE80211_RATECTL_AMRR);
499 * Activate a vap. State should have been prepared with a
500 * call to ieee80211_vap_setup and by the driver. On return
501 * from this call the vap is ready for use.
504 ieee80211_vap_attach(struct ieee80211vap *vap,
505 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat)
507 struct ifnet *ifp = vap->iv_ifp;
508 struct ieee80211com *ic = vap->iv_ic;
509 struct ifmediareq imr;
512 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
513 "%s: %s parent %s flags 0x%x flags_ext 0x%x\n",
514 __func__, ieee80211_opmode_name[vap->iv_opmode],
515 ic->ic_ifp->if_xname, vap->iv_flags, vap->iv_flags_ext);
518 * Do late attach work that cannot happen until after
519 * the driver has had a chance to override defaults.
521 ieee80211_node_latevattach(vap);
522 ieee80211_power_latevattach(vap);
524 maxrate = ieee80211_media_setup(ic, &vap->iv_media, vap->iv_caps,
525 vap->iv_opmode == IEEE80211_M_STA, media_change, media_stat);
526 ieee80211_media_status(ifp, &imr);
527 /* NB: strip explicit mode; we're actually in autoselect */
528 ifmedia_set(&vap->iv_media,
529 imr.ifm_active &~ (IFM_MMASK | IFM_IEEE80211_TURBO));
531 ifp->if_baudrate = IF_Mbps(maxrate);
533 ether_ifattach(ifp, vap->iv_myaddr, NULL);
534 if (vap->iv_opmode == IEEE80211_M_MONITOR) {
535 /* NB: disallow transmit */
537 ifp->if_transmit = null_transmit;
539 ifp->if_output = null_output;
541 /* hook output method setup by ether_ifattach */
542 vap->iv_output = ifp->if_output;
543 ifp->if_output = ieee80211_output;
545 /* NB: if_mtu set by ether_ifattach to ETHERMTU */
548 TAILQ_INSERT_TAIL(&ic->ic_vaps, vap, iv_next);
549 ieee80211_syncflag_locked(ic, IEEE80211_F_WME);
550 #ifdef IEEE80211_SUPPORT_SUPERG
551 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP);
553 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF);
554 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST);
555 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT);
556 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40);
557 ieee80211_syncifflag_locked(ic, IFF_PROMISC);
558 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI);
559 IEEE80211_UNLOCK(ic);
565 * Tear down vap state and reclaim the ifnet.
566 * The driver is assumed to have prepared for
567 * this; e.g. by turning off interrupts for the
571 ieee80211_vap_detach(struct ieee80211vap *vap)
573 struct ieee80211com *ic = vap->iv_ic;
574 struct ifnet *ifp = vap->iv_ifp;
576 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s parent %s\n",
577 __func__, ieee80211_opmode_name[vap->iv_opmode],
578 ic->ic_ifp->if_xname);
580 /* NB: bpfdetach is called by ether_ifdetach and claims all taps */
586 * Flush any deferred vap tasks.
588 ieee80211_draintask(ic, &vap->iv_nstate_task);
589 ieee80211_draintask(ic, &vap->iv_swbmiss_task);
592 /* XXX band-aid until ifnet handles this for us */
593 taskqueue_drain(taskqueue_swi, &ifp->if_linktask);
597 KASSERT(vap->iv_state == IEEE80211_S_INIT , ("vap still running"));
598 TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next);
599 ieee80211_syncflag_locked(ic, IEEE80211_F_WME);
600 #ifdef IEEE80211_SUPPORT_SUPERG
601 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP);
603 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF);
604 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST);
605 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT);
606 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40);
607 /* NB: this handles the bpfdetach done below */
608 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_BPF);
609 ieee80211_syncifflag_locked(ic, IFF_PROMISC);
610 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI);
611 IEEE80211_UNLOCK(ic);
613 ifmedia_removeall(&vap->iv_media);
615 ieee80211_radiotap_vdetach(vap);
616 ieee80211_regdomain_vdetach(vap);
617 ieee80211_scan_vdetach(vap);
618 #ifdef IEEE80211_SUPPORT_SUPERG
619 ieee80211_superg_vdetach(vap);
621 ieee80211_ht_vdetach(vap);
622 /* NB: must be before ieee80211_node_vdetach */
623 ieee80211_proto_vdetach(vap);
624 ieee80211_crypto_vdetach(vap);
625 ieee80211_power_vdetach(vap);
626 ieee80211_node_vdetach(vap);
627 ieee80211_sysctl_vdetach(vap);
633 * Synchronize flag bit state in the parent ifnet structure
634 * according to the state of all vap ifnet's. This is used,
635 * for example, to handle IFF_PROMISC and IFF_ALLMULTI.
638 ieee80211_syncifflag_locked(struct ieee80211com *ic, int flag)
640 struct ifnet *ifp = ic->ic_ifp;
641 struct ieee80211vap *vap;
644 IEEE80211_LOCK_ASSERT(ic);
647 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
648 if (vap->iv_ifp->if_flags & flag) {
650 * XXX the bridge sets PROMISC but we don't want to
651 * enable it on the device, discard here so all the
652 * drivers don't need to special-case it
654 if (flag == IFF_PROMISC &&
655 !(vap->iv_opmode == IEEE80211_M_MONITOR ||
656 (vap->iv_opmode == IEEE80211_M_AHDEMO &&
657 (vap->iv_caps & IEEE80211_C_TDMA) == 0)))
662 oflags = ifp->if_flags;
664 ifp->if_flags |= flag;
666 ifp->if_flags &= ~flag;
667 if ((ifp->if_flags ^ oflags) & flag) {
668 /* XXX should we return 1/0 and let caller do this? */
669 if (ifp->if_flags & IFF_RUNNING) {
670 if (flag == IFF_PROMISC)
671 ieee80211_runtask(ic, &ic->ic_promisc_task);
672 else if (flag == IFF_ALLMULTI)
673 ieee80211_runtask(ic, &ic->ic_mcast_task);
679 * Synchronize flag bit state in the com structure
680 * according to the state of all vap's. This is used,
681 * for example, to handle state changes via ioctls.
684 ieee80211_syncflag_locked(struct ieee80211com *ic, int flag)
686 struct ieee80211vap *vap;
689 IEEE80211_LOCK_ASSERT(ic);
692 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
693 if (vap->iv_flags & flag) {
698 ic->ic_flags |= flag;
700 ic->ic_flags &= ~flag;
704 ieee80211_syncflag(struct ieee80211vap *vap, int flag)
706 struct ieee80211com *ic = vap->iv_ic;
711 vap->iv_flags &= ~flag;
713 vap->iv_flags |= flag;
714 ieee80211_syncflag_locked(ic, flag);
715 IEEE80211_UNLOCK(ic);
719 * Synchronize flags_ht bit state in the com structure
720 * according to the state of all vap's. This is used,
721 * for example, to handle state changes via ioctls.
724 ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag)
726 struct ieee80211vap *vap;
729 IEEE80211_LOCK_ASSERT(ic);
732 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
733 if (vap->iv_flags_ht & flag) {
738 ic->ic_flags_ht |= flag;
740 ic->ic_flags_ht &= ~flag;
744 ieee80211_syncflag_ht(struct ieee80211vap *vap, int flag)
746 struct ieee80211com *ic = vap->iv_ic;
751 vap->iv_flags_ht &= ~flag;
753 vap->iv_flags_ht |= flag;
754 ieee80211_syncflag_ht_locked(ic, flag);
755 IEEE80211_UNLOCK(ic);
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.
764 ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag)
766 struct ieee80211vap *vap;
769 IEEE80211_LOCK_ASSERT(ic);
772 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
773 if (vap->iv_flags_ext & flag) {
778 ic->ic_flags_ext |= flag;
780 ic->ic_flags_ext &= ~flag;
784 ieee80211_syncflag_ext(struct ieee80211vap *vap, int flag)
786 struct ieee80211com *ic = vap->iv_ic;
791 vap->iv_flags_ext &= ~flag;
793 vap->iv_flags_ext |= flag;
794 ieee80211_syncflag_ext_locked(ic, flag);
795 IEEE80211_UNLOCK(ic);
799 mapgsm(u_int freq, u_int flags)
802 if (flags & IEEE80211_CHAN_QUARTER)
804 else if (flags & IEEE80211_CHAN_HALF)
808 /* NB: there is no 907/20 wide but leave room */
809 return (freq - 906*10) / 5;
813 mappsb(u_int freq, u_int flags)
815 return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5;
819 * Convert MHz frequency to IEEE channel number.
822 ieee80211_mhz2ieee(u_int freq, u_int flags)
824 #define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990)
825 if (flags & IEEE80211_CHAN_GSM)
826 return mapgsm(freq, flags);
827 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
831 return ((int) freq - 2407) / 5;
833 return 15 + ((freq - 2512) / 20);
834 } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */
836 /* XXX check regdomain? */
837 if (IS_FREQ_IN_PSB(freq))
838 return mappsb(freq, flags);
839 return (freq - 4000) / 5;
841 return (freq - 5000) / 5;
842 } else { /* either, guess */
846 if (907 <= freq && freq <= 922)
847 return mapgsm(freq, flags);
848 return ((int) freq - 2407) / 5;
851 if (IS_FREQ_IN_PSB(freq))
852 return mappsb(freq, flags);
853 else if (freq > 4900)
854 return (freq - 4000) / 5;
856 return 15 + ((freq - 2512) / 20);
858 return (freq - 5000) / 5;
860 #undef IS_FREQ_IN_PSB
864 * Convert channel to IEEE channel number.
867 ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c)
870 if_printf(ic->ic_ifp, "invalid channel (NULL)\n");
873 return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee);
877 * Convert IEEE channel number to MHz frequency.
880 ieee80211_ieee2mhz(u_int chan, u_int flags)
882 if (flags & IEEE80211_CHAN_GSM)
883 return 907 + 5 * (chan / 10);
884 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
888 return 2407 + chan*5;
890 return 2512 + ((chan-15)*20);
891 } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */
892 if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) {
894 return 4940 + chan*5 + (chan % 5 ? 2 : 0);
896 return 5000 + (chan*5);
897 } else { /* either, guess */
898 /* XXX can't distinguish PSB+GSM channels */
901 if (chan < 14) /* 0-13 */
902 return 2407 + chan*5;
903 if (chan < 27) /* 15-26 */
904 return 2512 + ((chan-15)*20);
905 return 5000 + (chan*5);
910 * Locate a channel given a frequency+flags. We cache
911 * the previous lookup to optimize switching between two
912 * channels--as happens with dynamic turbo.
914 struct ieee80211_channel *
915 ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags)
917 struct ieee80211_channel *c;
920 flags &= IEEE80211_CHAN_ALLTURBO;
922 if (c != NULL && c->ic_freq == freq &&
923 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
925 /* brute force search */
926 for (i = 0; i < ic->ic_nchans; i++) {
927 c = &ic->ic_channels[i];
928 if (c->ic_freq == freq &&
929 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
936 * Locate a channel given a channel number+flags. We cache
937 * the previous lookup to optimize switching between two
938 * channels--as happens with dynamic turbo.
940 struct ieee80211_channel *
941 ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags)
943 struct ieee80211_channel *c;
946 flags &= IEEE80211_CHAN_ALLTURBO;
948 if (c != NULL && c->ic_ieee == ieee &&
949 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
951 /* brute force search */
952 for (i = 0; i < ic->ic_nchans; i++) {
953 c = &ic->ic_channels[i];
954 if (c->ic_ieee == ieee &&
955 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
962 addmedia(struct ifmedia *media, int caps, int addsta, int mode, int mword)
964 #define ADD(_ic, _s, _o) \
966 IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL)
967 static const u_int mopts[IEEE80211_MODE_MAX] = {
968 [IEEE80211_MODE_AUTO] = IFM_AUTO,
969 [IEEE80211_MODE_11A] = IFM_IEEE80211_11A,
970 [IEEE80211_MODE_11B] = IFM_IEEE80211_11B,
971 [IEEE80211_MODE_11G] = IFM_IEEE80211_11G,
972 [IEEE80211_MODE_FH] = IFM_IEEE80211_FH,
973 [IEEE80211_MODE_TURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO,
974 [IEEE80211_MODE_TURBO_G] = IFM_IEEE80211_11G|IFM_IEEE80211_TURBO,
975 [IEEE80211_MODE_STURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO,
976 [IEEE80211_MODE_HALF] = IFM_IEEE80211_11A, /* XXX */
977 [IEEE80211_MODE_QUARTER] = IFM_IEEE80211_11A, /* XXX */
978 [IEEE80211_MODE_11NA] = IFM_IEEE80211_11NA,
979 [IEEE80211_MODE_11NG] = IFM_IEEE80211_11NG,
985 ADD(ic, mword, mopt); /* STA mode has no cap */
986 if (caps & IEEE80211_C_IBSS)
987 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC);
988 if (caps & IEEE80211_C_HOSTAP)
989 ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP);
990 if (caps & IEEE80211_C_AHDEMO)
991 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0);
992 if (caps & IEEE80211_C_MONITOR)
993 ADD(media, mword, mopt | IFM_IEEE80211_MONITOR);
994 if (caps & IEEE80211_C_WDS)
995 ADD(media, mword, mopt | IFM_IEEE80211_WDS);
996 if (caps & IEEE80211_C_MBSS)
997 ADD(media, mword, mopt | IFM_IEEE80211_MBSS);
1002 * Setup the media data structures according to the channel and
1006 ieee80211_media_setup(struct ieee80211com *ic,
1007 struct ifmedia *media, int caps, int addsta,
1008 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat)
1010 int i, j, mode, rate, maxrate, mword, r;
1011 const struct ieee80211_rateset *rs;
1012 struct ieee80211_rateset allrates;
1015 * Fill in media characteristics.
1017 ifmedia_init(media, 0, media_change, media_stat);
1020 * Add media for legacy operating modes.
1022 memset(&allrates, 0, sizeof(allrates));
1023 for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) {
1024 if (isclr(ic->ic_modecaps, mode))
1026 addmedia(media, caps, addsta, mode, IFM_AUTO);
1027 if (mode == IEEE80211_MODE_AUTO)
1029 rs = &ic->ic_sup_rates[mode];
1030 for (i = 0; i < rs->rs_nrates; i++) {
1031 rate = rs->rs_rates[i];
1032 mword = ieee80211_rate2media(ic, rate, mode);
1035 addmedia(media, caps, addsta, mode, mword);
1037 * Add legacy rate to the collection of all rates.
1039 r = rate & IEEE80211_RATE_VAL;
1040 for (j = 0; j < allrates.rs_nrates; j++)
1041 if (allrates.rs_rates[j] == r)
1043 if (j == allrates.rs_nrates) {
1044 /* unique, add to the set */
1045 allrates.rs_rates[j] = r;
1046 allrates.rs_nrates++;
1048 rate = (rate & IEEE80211_RATE_VAL) / 2;
1053 for (i = 0; i < allrates.rs_nrates; i++) {
1054 mword = ieee80211_rate2media(ic, allrates.rs_rates[i],
1055 IEEE80211_MODE_AUTO);
1058 /* NB: remove media options from mword */
1059 addmedia(media, caps, addsta,
1060 IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword));
1063 * Add HT/11n media. Note that we do not have enough
1064 * bits in the media subtype to express the MCS so we
1065 * use a "placeholder" media subtype and any fixed MCS
1066 * must be specified with a different mechanism.
1068 for (; mode <= IEEE80211_MODE_11NG; mode++) {
1069 if (isclr(ic->ic_modecaps, mode))
1071 addmedia(media, caps, addsta, mode, IFM_AUTO);
1072 addmedia(media, caps, addsta, mode, IFM_IEEE80211_MCS);
1074 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) ||
1075 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) {
1076 addmedia(media, caps, addsta,
1077 IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS);
1078 /* XXX could walk htrates */
1079 /* XXX known array size */
1080 if (ieee80211_htrates[15].ht40_rate_400ns > maxrate)
1081 maxrate = ieee80211_htrates[15].ht40_rate_400ns;
1087 ieee80211_media_init(struct ieee80211com *ic)
1089 struct ifnet *ifp = ic->ic_ifp;
1092 /* NB: this works because the structure is initialized to zero */
1093 if (!LIST_EMPTY(&ic->ic_media.ifm_list)) {
1095 * We are re-initializing the channel list; clear
1096 * the existing media state as the media routines
1097 * don't suppress duplicates.
1099 ifmedia_removeall(&ic->ic_media);
1101 ieee80211_chan_init(ic);
1104 * Recalculate media settings in case new channel list changes
1105 * the set of available modes.
1107 maxrate = ieee80211_media_setup(ic, &ic->ic_media, ic->ic_caps, 1,
1108 ieee80211com_media_change, ieee80211com_media_status);
1109 /* NB: strip explicit mode; we're actually in autoselect */
1110 ifmedia_set(&ic->ic_media,
1111 media_status(ic->ic_opmode, ic->ic_curchan) &~
1112 (IFM_MMASK | IFM_IEEE80211_TURBO));
1114 ifp->if_baudrate = IF_Mbps(maxrate);
1116 /* XXX need to propagate new media settings to vap's */
1119 /* XXX inline or eliminate? */
1120 const struct ieee80211_rateset *
1121 ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c)
1123 /* XXX does this work for 11ng basic rates? */
1124 return &ic->ic_sup_rates[ieee80211_chan2mode(c)];
1128 ieee80211_announce(struct ieee80211com *ic)
1130 struct ifnet *ifp = ic->ic_ifp;
1131 int i, mode, rate, mword;
1132 const struct ieee80211_rateset *rs;
1134 /* NB: skip AUTO since it has no rates */
1135 for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) {
1136 if (isclr(ic->ic_modecaps, mode))
1138 if_printf(ifp, "%s rates: ", ieee80211_phymode_name[mode]);
1139 rs = &ic->ic_sup_rates[mode];
1140 for (i = 0; i < rs->rs_nrates; i++) {
1141 mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode);
1144 rate = ieee80211_media2rate(mword);
1145 kprintf("%s%d%sMbps", (i != 0 ? " " : ""),
1146 rate / 2, ((rate & 0x1) != 0 ? ".5" : ""));
1150 ieee80211_ht_announce(ic);
1154 ieee80211_announce_channels(struct ieee80211com *ic)
1156 const struct ieee80211_channel *c;
1160 kprintf("Chan Freq CW RegPwr MinPwr MaxPwr\n");
1161 for (i = 0; i < ic->ic_nchans; i++) {
1162 c = &ic->ic_channels[i];
1163 if (IEEE80211_IS_CHAN_ST(c))
1165 else if (IEEE80211_IS_CHAN_108A(c))
1167 else if (IEEE80211_IS_CHAN_108G(c))
1169 else if (IEEE80211_IS_CHAN_HT(c))
1171 else if (IEEE80211_IS_CHAN_A(c))
1173 else if (IEEE80211_IS_CHAN_ANYG(c))
1175 else if (IEEE80211_IS_CHAN_B(c))
1179 if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c))
1181 else if (IEEE80211_IS_CHAN_HALF(c))
1183 else if (IEEE80211_IS_CHAN_QUARTER(c))
1187 kprintf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n"
1188 , c->ic_ieee, c->ic_freq, type
1190 , IEEE80211_IS_CHAN_HT40U(c) ? '+' :
1191 IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' '
1193 , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0
1194 , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0
1200 media2mode(const struct ifmedia_entry *ime, uint32_t flags, uint16_t *mode)
1202 switch (IFM_MODE(ime->ifm_media)) {
1203 case IFM_IEEE80211_11A:
1204 *mode = IEEE80211_MODE_11A;
1206 case IFM_IEEE80211_11B:
1207 *mode = IEEE80211_MODE_11B;
1209 case IFM_IEEE80211_11G:
1210 *mode = IEEE80211_MODE_11G;
1212 case IFM_IEEE80211_FH:
1213 *mode = IEEE80211_MODE_FH;
1215 case IFM_IEEE80211_11NA:
1216 *mode = IEEE80211_MODE_11NA;
1218 case IFM_IEEE80211_11NG:
1219 *mode = IEEE80211_MODE_11NG;
1222 *mode = IEEE80211_MODE_AUTO;
1228 * Turbo mode is an ``option''.
1229 * XXX does not apply to AUTO
1231 if (ime->ifm_media & IFM_IEEE80211_TURBO) {
1232 if (*mode == IEEE80211_MODE_11A) {
1233 if (flags & IEEE80211_F_TURBOP)
1234 *mode = IEEE80211_MODE_TURBO_A;
1236 *mode = IEEE80211_MODE_STURBO_A;
1237 } else if (*mode == IEEE80211_MODE_11G)
1238 *mode = IEEE80211_MODE_TURBO_G;
1247 * Handle a media change request on the underlying interface.
1250 ieee80211com_media_change(struct ifnet *ifp)
1256 * Handle a media change request on the vap interface.
1259 ieee80211_media_change(struct ifnet *ifp)
1261 struct ieee80211vap *vap = ifp->if_softc;
1262 struct ifmedia_entry *ime = vap->iv_media.ifm_cur;
1265 if (!media2mode(ime, vap->iv_flags, &newmode))
1267 if (vap->iv_des_mode != newmode) {
1268 vap->iv_des_mode = newmode;
1269 /* XXX kick state machine if up+running */
1275 * Common code to calculate the media status word
1276 * from the operating mode and channel state.
1279 media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan)
1283 status = IFM_IEEE80211;
1285 case IEEE80211_M_STA:
1287 case IEEE80211_M_IBSS:
1288 status |= IFM_IEEE80211_ADHOC;
1290 case IEEE80211_M_HOSTAP:
1291 status |= IFM_IEEE80211_HOSTAP;
1293 case IEEE80211_M_MONITOR:
1294 status |= IFM_IEEE80211_MONITOR;
1296 case IEEE80211_M_AHDEMO:
1297 status |= IFM_IEEE80211_ADHOC | IFM_FLAG0;
1299 case IEEE80211_M_WDS:
1300 status |= IFM_IEEE80211_WDS;
1302 case IEEE80211_M_MBSS:
1303 status |= IFM_IEEE80211_MBSS;
1306 if (IEEE80211_IS_CHAN_HTA(chan)) {
1307 status |= IFM_IEEE80211_11NA;
1308 } else if (IEEE80211_IS_CHAN_HTG(chan)) {
1309 status |= IFM_IEEE80211_11NG;
1310 } else if (IEEE80211_IS_CHAN_A(chan)) {
1311 status |= IFM_IEEE80211_11A;
1312 } else if (IEEE80211_IS_CHAN_B(chan)) {
1313 status |= IFM_IEEE80211_11B;
1314 } else if (IEEE80211_IS_CHAN_ANYG(chan)) {
1315 status |= IFM_IEEE80211_11G;
1316 } else if (IEEE80211_IS_CHAN_FHSS(chan)) {
1317 status |= IFM_IEEE80211_FH;
1319 /* XXX else complain? */
1321 if (IEEE80211_IS_CHAN_TURBO(chan))
1322 status |= IFM_IEEE80211_TURBO;
1324 if (IEEE80211_IS_CHAN_HT20(chan))
1325 status |= IFM_IEEE80211_HT20;
1326 if (IEEE80211_IS_CHAN_HT40(chan))
1327 status |= IFM_IEEE80211_HT40;
1333 ieee80211com_media_status(struct ifnet *ifp, struct ifmediareq *imr)
1335 struct ieee80211com *ic = ifp->if_l2com;
1336 struct ieee80211vap *vap;
1338 imr->ifm_status = IFM_AVALID;
1339 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
1340 if (vap->iv_ifp->if_flags & IFF_UP) {
1341 imr->ifm_status |= IFM_ACTIVE;
1344 imr->ifm_active = media_status(ic->ic_opmode, ic->ic_curchan);
1345 if (imr->ifm_status & IFM_ACTIVE)
1346 imr->ifm_current = imr->ifm_active;
1350 ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr)
1352 struct ieee80211vap *vap = ifp->if_softc;
1353 struct ieee80211com *ic = vap->iv_ic;
1354 enum ieee80211_phymode mode;
1356 imr->ifm_status = IFM_AVALID;
1358 * NB: use the current channel's mode to lock down a xmit
1359 * rate only when running; otherwise we may have a mismatch
1360 * in which case the rate will not be convertible.
1362 if (vap->iv_state == IEEE80211_S_RUN) {
1363 imr->ifm_status |= IFM_ACTIVE;
1364 mode = ieee80211_chan2mode(ic->ic_curchan);
1366 mode = IEEE80211_MODE_AUTO;
1367 imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan);
1369 * Calculate a current rate if possible.
1371 if (vap->iv_txparms[mode].ucastrate != IEEE80211_FIXED_RATE_NONE) {
1373 * A fixed rate is set, report that.
1375 imr->ifm_active |= ieee80211_rate2media(ic,
1376 vap->iv_txparms[mode].ucastrate, mode);
1377 } else if (vap->iv_opmode == IEEE80211_M_STA) {
1379 * In station mode report the current transmit rate.
1381 imr->ifm_active |= ieee80211_rate2media(ic,
1382 vap->iv_bss->ni_txrate, mode);
1384 imr->ifm_active |= IFM_AUTO;
1385 if (imr->ifm_status & IFM_ACTIVE)
1386 imr->ifm_current = imr->ifm_active;
1390 * Set the current phy mode and recalculate the active channel
1391 * set based on the available channels for this mode. Also
1392 * select a new default/current channel if the current one is
1393 * inappropriate for this mode.
1396 ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode)
1399 * Adjust basic rates in 11b/11g supported rate set.
1400 * Note that if operating on a hal/quarter rate channel
1401 * this is a noop as those rates sets are different
1404 if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B)
1405 ieee80211_setbasicrates(&ic->ic_sup_rates[mode], mode);
1407 ic->ic_curmode = mode;
1408 ieee80211_reset_erp(ic); /* reset ERP state */
1414 * Return the phy mode for with the specified channel.
1416 enum ieee80211_phymode
1417 ieee80211_chan2mode(const struct ieee80211_channel *chan)
1420 if (IEEE80211_IS_CHAN_HTA(chan))
1421 return IEEE80211_MODE_11NA;
1422 else if (IEEE80211_IS_CHAN_HTG(chan))
1423 return IEEE80211_MODE_11NG;
1424 else if (IEEE80211_IS_CHAN_108G(chan))
1425 return IEEE80211_MODE_TURBO_G;
1426 else if (IEEE80211_IS_CHAN_ST(chan))
1427 return IEEE80211_MODE_STURBO_A;
1428 else if (IEEE80211_IS_CHAN_TURBO(chan))
1429 return IEEE80211_MODE_TURBO_A;
1430 else if (IEEE80211_IS_CHAN_HALF(chan))
1431 return IEEE80211_MODE_HALF;
1432 else if (IEEE80211_IS_CHAN_QUARTER(chan))
1433 return IEEE80211_MODE_QUARTER;
1434 else if (IEEE80211_IS_CHAN_A(chan))
1435 return IEEE80211_MODE_11A;
1436 else if (IEEE80211_IS_CHAN_ANYG(chan))
1437 return IEEE80211_MODE_11G;
1438 else if (IEEE80211_IS_CHAN_B(chan))
1439 return IEEE80211_MODE_11B;
1440 else if (IEEE80211_IS_CHAN_FHSS(chan))
1441 return IEEE80211_MODE_FH;
1443 /* NB: should not get here */
1444 kprintf("%s: cannot map channel to mode; freq %u flags 0x%x\n",
1445 __func__, chan->ic_freq, chan->ic_flags);
1446 return IEEE80211_MODE_11B;
1450 u_int match; /* rate + mode */
1451 u_int media; /* if_media rate */
1455 findmedia(const struct ratemedia rates[], int n, u_int match)
1459 for (i = 0; i < n; i++)
1460 if (rates[i].match == match)
1461 return rates[i].media;
1466 * Convert IEEE80211 rate value to ifmedia subtype.
1467 * Rate is either a legacy rate in units of 0.5Mbps
1471 ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode)
1473 #define N(a) (sizeof(a) / sizeof(a[0]))
1474 static const struct ratemedia rates[] = {
1475 { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 },
1476 { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 },
1477 { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 },
1478 { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 },
1479 { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 },
1480 { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 },
1481 { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 },
1482 { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 },
1483 { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 },
1484 { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 },
1485 { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 },
1486 { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 },
1487 { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 },
1488 { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 },
1489 { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 },
1490 { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 },
1491 { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 },
1492 { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 },
1493 { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 },
1494 { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 },
1495 { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 },
1496 { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 },
1497 { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 },
1498 { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 },
1499 { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 },
1500 { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 },
1501 { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 },
1502 { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 },
1503 { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 },
1504 { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 },
1505 /* NB: OFDM72 doesn't realy exist so we don't handle it */
1507 static const struct ratemedia htrates[] = {
1508 { 0, IFM_IEEE80211_MCS },
1509 { 1, IFM_IEEE80211_MCS },
1510 { 2, IFM_IEEE80211_MCS },
1511 { 3, IFM_IEEE80211_MCS },
1512 { 4, IFM_IEEE80211_MCS },
1513 { 5, IFM_IEEE80211_MCS },
1514 { 6, IFM_IEEE80211_MCS },
1515 { 7, IFM_IEEE80211_MCS },
1516 { 8, IFM_IEEE80211_MCS },
1517 { 9, IFM_IEEE80211_MCS },
1518 { 10, IFM_IEEE80211_MCS },
1519 { 11, IFM_IEEE80211_MCS },
1520 { 12, IFM_IEEE80211_MCS },
1521 { 13, IFM_IEEE80211_MCS },
1522 { 14, IFM_IEEE80211_MCS },
1523 { 15, IFM_IEEE80211_MCS },
1528 * Check 11n rates first for match as an MCS.
1530 if (mode == IEEE80211_MODE_11NA) {
1531 if (rate & IEEE80211_RATE_MCS) {
1532 rate &= ~IEEE80211_RATE_MCS;
1533 m = findmedia(htrates, N(htrates), rate);
1535 return m | IFM_IEEE80211_11NA;
1537 } else if (mode == IEEE80211_MODE_11NG) {
1538 /* NB: 12 is ambiguous, it will be treated as an MCS */
1539 if (rate & IEEE80211_RATE_MCS) {
1540 rate &= ~IEEE80211_RATE_MCS;
1541 m = findmedia(htrates, N(htrates), rate);
1543 return m | IFM_IEEE80211_11NG;
1546 rate &= IEEE80211_RATE_VAL;
1548 case IEEE80211_MODE_11A:
1549 case IEEE80211_MODE_HALF: /* XXX good 'nuf */
1550 case IEEE80211_MODE_QUARTER:
1551 case IEEE80211_MODE_11NA:
1552 case IEEE80211_MODE_TURBO_A:
1553 case IEEE80211_MODE_STURBO_A:
1554 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11A);
1555 case IEEE80211_MODE_11B:
1556 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11B);
1557 case IEEE80211_MODE_FH:
1558 return findmedia(rates, N(rates), rate | IFM_IEEE80211_FH);
1559 case IEEE80211_MODE_AUTO:
1560 /* NB: ic may be NULL for some drivers */
1561 if (ic != NULL && ic->ic_phytype == IEEE80211_T_FH)
1562 return findmedia(rates, N(rates),
1563 rate | IFM_IEEE80211_FH);
1564 /* NB: hack, 11g matches both 11b+11a rates */
1566 case IEEE80211_MODE_11G:
1567 case IEEE80211_MODE_11NG:
1568 case IEEE80211_MODE_TURBO_G:
1569 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11G);
1576 ieee80211_media2rate(int mword)
1578 #define N(a) (sizeof(a) / sizeof(a[0]))
1579 static const int ieeerates[] = {
1583 2, /* IFM_IEEE80211_FH1 */
1584 4, /* IFM_IEEE80211_FH2 */
1585 2, /* IFM_IEEE80211_DS1 */
1586 4, /* IFM_IEEE80211_DS2 */
1587 11, /* IFM_IEEE80211_DS5 */
1588 22, /* IFM_IEEE80211_DS11 */
1589 44, /* IFM_IEEE80211_DS22 */
1590 12, /* IFM_IEEE80211_OFDM6 */
1591 18, /* IFM_IEEE80211_OFDM9 */
1592 24, /* IFM_IEEE80211_OFDM12 */
1593 36, /* IFM_IEEE80211_OFDM18 */
1594 48, /* IFM_IEEE80211_OFDM24 */
1595 72, /* IFM_IEEE80211_OFDM36 */
1596 96, /* IFM_IEEE80211_OFDM48 */
1597 108, /* IFM_IEEE80211_OFDM54 */
1598 144, /* IFM_IEEE80211_OFDM72 */
1599 0, /* IFM_IEEE80211_DS354k */
1600 0, /* IFM_IEEE80211_DS512k */
1601 6, /* IFM_IEEE80211_OFDM3 */
1602 9, /* IFM_IEEE80211_OFDM4 */
1603 54, /* IFM_IEEE80211_OFDM27 */
1604 -1, /* IFM_IEEE80211_MCS */
1606 return IFM_SUBTYPE(mword) < N(ieeerates) ?
1607 ieeerates[IFM_SUBTYPE(mword)] : 0;
1612 * The following hash function is adapted from "Hash Functions" by Bob Jenkins
1613 * ("Algorithm Alley", Dr. Dobbs Journal, September 1997).
1615 #define mix(a, b, c) \
1617 a -= b; a -= c; a ^= (c >> 13); \
1618 b -= c; b -= a; b ^= (a << 8); \
1619 c -= a; c -= b; c ^= (b >> 13); \
1620 a -= b; a -= c; a ^= (c >> 12); \
1621 b -= c; b -= a; b ^= (a << 16); \
1622 c -= a; c -= b; c ^= (b >> 5); \
1623 a -= b; a -= c; a ^= (c >> 3); \
1624 b -= c; b -= a; b ^= (a << 10); \
1625 c -= a; c -= b; c ^= (b >> 15); \
1626 } while (/*CONSTCOND*/0)
1629 ieee80211_mac_hash(const struct ieee80211com *ic,
1630 const uint8_t addr[IEEE80211_ADDR_LEN])
1632 uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = ic->ic_hash_key;