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 TAILQ_INIT(&ic->ic_vaps);
272 /* Create a taskqueue for all state changes */
273 ic->ic_tq = taskqueue_create("ic_taskq", M_WAITOK | M_ZERO,
274 taskqueue_thread_enqueue, &ic->ic_tq);
275 taskqueue_start_threads(&ic->ic_tq, 1, TDPRI_KERN_DAEMON, -1,
276 "%s taskq", ifp->if_xname);
278 * Fill in 802.11 available channel set, mark all
279 * available channels as active, and pick a default
280 * channel if not already specified.
282 ieee80211_media_init(ic);
284 ic->ic_update_mcast = null_update_mcast;
285 ic->ic_update_promisc = null_update_promisc;
287 ic->ic_hash_key = karc4random();
288 ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT;
289 ic->ic_lintval = ic->ic_bintval;
290 ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX;
292 ieee80211_crypto_attach(ic);
293 ieee80211_node_attach(ic);
294 ieee80211_power_attach(ic);
295 ieee80211_proto_attach(ic);
296 #ifdef IEEE80211_SUPPORT_SUPERG
297 ieee80211_superg_attach(ic);
299 ieee80211_ht_attach(ic);
300 ieee80211_scan_attach(ic);
301 ieee80211_regdomain_attach(ic);
302 ieee80211_dfs_attach(ic);
304 ieee80211_sysctl_attach(ic);
306 ifp->if_addrlen = IEEE80211_ADDR_LEN;
308 if_attach(ifp, NULL);
309 ifp->if_mtu = IEEE80211_MTU_MAX;
310 ifp->if_broadcastaddr = ieee80211broadcastaddr;
311 ifp->if_output = null_output;
312 ifp->if_input = null_input; /* just in case */
313 ifp->if_resolvemulti = NULL; /* NB: callers check */
315 ifa = ifaddr_byindex(ifp->if_index);
316 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__));
317 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
318 sdl->sdl_type = IFT_ETHER; /* XXX IFT_IEEE80211? */
319 sdl->sdl_alen = IEEE80211_ADDR_LEN;
320 IEEE80211_ADDR_COPY(LLADDR(sdl), macaddr);
325 * Detach net80211 state on device detach. Tear down
326 * all vap's and reclaim all common state prior to the
327 * device state going away. Note we may call back into
328 * driver; it must be prepared for this.
331 ieee80211_ifdetach(struct ieee80211com *ic)
333 struct ifnet *ifp = ic->ic_ifp;
334 struct ieee80211vap *vap;
338 while ((vap = TAILQ_FIRST(&ic->ic_vaps)) != NULL)
339 ieee80211_vap_destroy(vap);
340 ieee80211_waitfor_parent(ic);
342 ieee80211_sysctl_detach(ic);
343 ieee80211_dfs_detach(ic);
344 ieee80211_regdomain_detach(ic);
345 ieee80211_scan_detach(ic);
346 #ifdef IEEE80211_SUPPORT_SUPERG
347 ieee80211_superg_detach(ic);
349 ieee80211_ht_detach(ic);
350 /* NB: must be called before ieee80211_node_detach */
351 ieee80211_proto_detach(ic);
352 ieee80211_crypto_detach(ic);
353 ieee80211_power_detach(ic);
354 ieee80211_node_detach(ic);
356 ifmedia_removeall(&ic->ic_media);
357 taskqueue_free(ic->ic_tq);
361 * Default reset method for use with the ioctl support. This
362 * method is invoked after any state change in the 802.11
363 * layer that should be propagated to the hardware but not
364 * require re-initialization of the 802.11 state machine (e.g
365 * rescanning for an ap). We always return ENETRESET which
366 * should cause the driver to re-initialize the device. Drivers
367 * can override this method to implement more optimized support.
370 default_reset(struct ieee80211vap *vap, u_long cmd)
376 * Prepare a vap for use. Drivers use this call to
377 * setup net80211 state in new vap's prior attaching
378 * them with ieee80211_vap_attach (below).
381 ieee80211_vap_setup(struct ieee80211com *ic, struct ieee80211vap *vap,
382 const char name[IFNAMSIZ], int unit, int opmode, int flags,
383 const uint8_t bssid[IEEE80211_ADDR_LEN],
384 const uint8_t macaddr[IEEE80211_ADDR_LEN])
388 ifp = if_alloc(IFT_ETHER);
390 if_printf(ic->ic_ifp, "%s: unable to allocate ifnet\n",
394 if_initname(ifp, name, unit);
395 ifp->if_softc = vap; /* back pointer */
396 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST;
397 ifp->if_start = ieee80211_start;
398 ifp->if_ioctl = ieee80211_ioctl;
399 ifp->if_init = ieee80211_init;
400 /* NB: input+output filled in by ether_ifattach */
401 ifq_set_maxlen(&ifp->if_snd, IFQ_MAXLEN);
402 ifq_set_ready(&ifp->if_snd);
406 vap->iv_flags = ic->ic_flags; /* propagate common flags */
407 vap->iv_flags_ext = ic->ic_flags_ext;
408 vap->iv_flags_ven = ic->ic_flags_ven;
409 vap->iv_caps = ic->ic_caps &~ IEEE80211_C_OPMODE;
410 vap->iv_htcaps = ic->ic_htcaps;
411 vap->iv_opmode = opmode;
412 vap->iv_caps |= ieee80211_opcap[opmode];
414 case IEEE80211_M_WDS:
416 * WDS links must specify the bssid of the far end.
417 * For legacy operation this is a static relationship.
418 * For non-legacy operation the station must associate
419 * and be authorized to pass traffic. Plumbing the
420 * vap to the proper node happens when the vap
421 * transitions to RUN state.
423 IEEE80211_ADDR_COPY(vap->iv_des_bssid, bssid);
424 vap->iv_flags |= IEEE80211_F_DESBSSID;
425 if (flags & IEEE80211_CLONE_WDSLEGACY)
426 vap->iv_flags_ext |= IEEE80211_FEXT_WDSLEGACY;
428 #ifdef IEEE80211_SUPPORT_TDMA
429 case IEEE80211_M_AHDEMO:
430 if (flags & IEEE80211_CLONE_TDMA) {
431 /* NB: checked before clone operation allowed */
432 KASSERT(ic->ic_caps & IEEE80211_C_TDMA,
433 ("not TDMA capable, ic_caps 0x%x", ic->ic_caps));
435 * Propagate TDMA capability to mark vap; this
436 * cannot be removed and is used to distinguish
437 * regular ahdemo operation from ahdemo+tdma.
439 vap->iv_caps |= IEEE80211_C_TDMA;
444 /* auto-enable s/w beacon miss support */
445 if (flags & IEEE80211_CLONE_NOBEACONS)
446 vap->iv_flags_ext |= IEEE80211_FEXT_SWBMISS;
447 /* auto-generated or user supplied MAC address */
448 if (flags & (IEEE80211_CLONE_BSSID|IEEE80211_CLONE_MACADDR))
449 vap->iv_flags_ext |= IEEE80211_FEXT_UNIQMAC;
451 * Enable various functionality by default if we're
452 * capable; the driver can override us if it knows better.
454 if (vap->iv_caps & IEEE80211_C_WME)
455 vap->iv_flags |= IEEE80211_F_WME;
456 if (vap->iv_caps & IEEE80211_C_BURST)
457 vap->iv_flags |= IEEE80211_F_BURST;
460 * NB: bg scanning only makes sense for station mode right now
462 * XXX: bgscan is not necessarily stable, so do not enable it by
463 * default. It messes up atheros drivers for sure.
464 * (tested w/ AR9280).
466 if (vap->iv_opmode == IEEE80211_M_STA &&
467 (vap->iv_caps & IEEE80211_C_BGSCAN))
468 vap->iv_flags |= IEEE80211_F_BGSCAN;
470 vap->iv_flags |= IEEE80211_F_DOTH; /* XXX no cap, just ena */
471 /* NB: DFS support only makes sense for ap mode right now */
472 if (vap->iv_opmode == IEEE80211_M_HOSTAP &&
473 (vap->iv_caps & IEEE80211_C_DFS))
474 vap->iv_flags_ext |= IEEE80211_FEXT_DFS;
476 vap->iv_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */
477 vap->iv_bmissthreshold = IEEE80211_HWBMISS_DEFAULT;
478 vap->iv_dtim_period = IEEE80211_DTIM_DEFAULT;
480 * Install a default reset method for the ioctl support;
481 * the driver can override this.
483 vap->iv_reset = default_reset;
485 IEEE80211_ADDR_COPY(vap->iv_myaddr, macaddr);
487 ieee80211_sysctl_vattach(vap);
488 ieee80211_crypto_vattach(vap);
489 ieee80211_node_vattach(vap);
490 ieee80211_power_vattach(vap);
491 ieee80211_proto_vattach(vap);
492 #ifdef IEEE80211_SUPPORT_SUPERG
493 ieee80211_superg_vattach(vap);
495 ieee80211_ht_vattach(vap);
496 ieee80211_scan_vattach(vap);
497 ieee80211_regdomain_vattach(vap);
498 ieee80211_radiotap_vattach(vap);
499 ieee80211_ratectl_set(vap, IEEE80211_RATECTL_AMRR);
505 * Activate a vap. State should have been prepared with a
506 * call to ieee80211_vap_setup and by the driver. On return
507 * from this call the vap is ready for use.
510 ieee80211_vap_attach(struct ieee80211vap *vap,
511 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat)
513 struct ifnet *ifp = vap->iv_ifp;
514 struct ieee80211com *ic = vap->iv_ic;
515 struct ifmediareq imr;
518 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
519 "%s: %s parent %s flags 0x%x flags_ext 0x%x\n",
520 __func__, ieee80211_opmode_name[vap->iv_opmode],
521 ic->ic_ifp->if_xname, vap->iv_flags, vap->iv_flags_ext);
524 * Do late attach work that cannot happen until after
525 * the driver has had a chance to override defaults.
527 ieee80211_node_latevattach(vap);
528 ieee80211_power_latevattach(vap);
530 maxrate = ieee80211_media_setup(ic, &vap->iv_media, vap->iv_caps,
531 vap->iv_opmode == IEEE80211_M_STA, media_change, media_stat);
532 ieee80211_media_status(ifp, &imr);
533 /* NB: strip explicit mode; we're actually in autoselect */
534 ifmedia_set(&vap->iv_media,
535 imr.ifm_active &~ (IFM_MMASK | IFM_IEEE80211_TURBO));
537 ifp->if_baudrate = IF_Mbps(maxrate);
539 ether_ifattach(ifp, vap->iv_myaddr, &wlan_global_serializer);
540 if (vap->iv_opmode == IEEE80211_M_MONITOR) {
541 /* NB: disallow transmit */
543 ifp->if_transmit = null_transmit;
545 ifp->if_output = null_output;
547 /* hook output method setup by ether_ifattach */
548 vap->iv_output = ifp->if_output;
549 ifp->if_output = ieee80211_output;
551 /* NB: if_mtu set by ether_ifattach to ETHERMTU */
553 TAILQ_INSERT_TAIL(&ic->ic_vaps, vap, iv_next);
554 ieee80211_syncflag_locked(ic, IEEE80211_F_WME);
555 #ifdef IEEE80211_SUPPORT_SUPERG
556 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP);
558 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF);
559 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST);
560 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT);
561 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40);
562 ieee80211_syncifflag_locked(ic, IFF_PROMISC);
563 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI);
569 * Tear down vap state and reclaim the ifnet.
570 * The driver is assumed to have prepared for
571 * this; e.g. by turning off interrupts for the
575 ieee80211_vap_detach(struct ieee80211vap *vap)
577 struct ieee80211com *ic = vap->iv_ic;
578 struct ifnet *ifp = vap->iv_ifp;
580 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s parent %s\n",
581 __func__, ieee80211_opmode_name[vap->iv_opmode],
582 ic->ic_ifp->if_xname);
585 * NB: bpfdetach is called by ether_ifdetach and claims all taps
587 * ether_ifdetach() must be called without the serializer held.
589 wlan_assert_serialized();
590 wlan_serialize_exit(); /* exit to block */
593 wlan_serialize_enter(); /* then reenter */
597 * Flush any deferred vap tasks.
599 wlan_serialize_exit(); /* exit to block */
600 ieee80211_draintask(ic, &vap->iv_nstate_task);
601 ieee80211_draintask(ic, &vap->iv_swbmiss_task);
602 wlan_serialize_enter(); /* then reenter */
605 /* XXX band-aid until ifnet handles this for us */
606 taskqueue_drain(taskqueue_swi, &ifp->if_linktask);
609 KASSERT(vap->iv_state == IEEE80211_S_INIT , ("vap still running"));
610 TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next);
611 ieee80211_syncflag_locked(ic, IEEE80211_F_WME);
612 #ifdef IEEE80211_SUPPORT_SUPERG
613 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP);
615 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF);
616 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST);
617 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT);
618 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40);
619 /* NB: this handles the bpfdetach done below */
620 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_BPF);
621 ieee80211_syncifflag_locked(ic, IFF_PROMISC);
622 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI);
624 ifmedia_removeall(&vap->iv_media);
626 ieee80211_radiotap_vdetach(vap);
627 ieee80211_regdomain_vdetach(vap);
628 ieee80211_scan_vdetach(vap);
629 #ifdef IEEE80211_SUPPORT_SUPERG
630 ieee80211_superg_vdetach(vap);
632 ieee80211_ht_vdetach(vap);
633 /* NB: must be before ieee80211_node_vdetach */
634 ieee80211_proto_vdetach(vap);
635 ieee80211_crypto_vdetach(vap);
636 ieee80211_power_vdetach(vap);
637 ieee80211_node_vdetach(vap);
638 ieee80211_sysctl_vdetach(vap);
644 * Synchronize flag bit state in the parent ifnet structure
645 * according to the state of all vap ifnet's. This is used,
646 * for example, to handle IFF_PROMISC and IFF_ALLMULTI.
649 ieee80211_syncifflag_locked(struct ieee80211com *ic, int flag)
651 struct ifnet *ifp = ic->ic_ifp;
652 struct ieee80211vap *vap;
656 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
657 if (vap->iv_ifp->if_flags & flag) {
659 * XXX the bridge sets PROMISC but we don't want to
660 * enable it on the device, discard here so all the
661 * drivers don't need to special-case it
663 if (flag == IFF_PROMISC &&
664 !(vap->iv_opmode == IEEE80211_M_MONITOR ||
665 (vap->iv_opmode == IEEE80211_M_AHDEMO &&
666 (vap->iv_caps & IEEE80211_C_TDMA) == 0)))
671 oflags = ifp->if_flags;
673 ifp->if_flags |= flag;
675 ifp->if_flags &= ~flag;
676 if ((ifp->if_flags ^ oflags) & flag) {
677 /* XXX should we return 1/0 and let caller do this? */
678 if (ifp->if_flags & IFF_RUNNING) {
679 if (flag == IFF_PROMISC)
680 ieee80211_runtask(ic, &ic->ic_promisc_task);
681 else if (flag == IFF_ALLMULTI)
682 ieee80211_runtask(ic, &ic->ic_mcast_task);
688 * Synchronize flag bit state in the com structure
689 * according to the state of all vap's. This is used,
690 * for example, to handle state changes via ioctls.
693 ieee80211_syncflag_locked(struct ieee80211com *ic, int flag)
695 struct ieee80211vap *vap;
699 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
700 if (vap->iv_flags & flag) {
705 ic->ic_flags |= flag;
707 ic->ic_flags &= ~flag;
711 ieee80211_syncflag(struct ieee80211vap *vap, int flag)
713 struct ieee80211com *ic = vap->iv_ic;
717 vap->iv_flags &= ~flag;
719 vap->iv_flags |= flag;
720 ieee80211_syncflag_locked(ic, flag);
724 * Synchronize flags_ht bit state in the com structure
725 * according to the state of all vap's. This is used,
726 * for example, to handle state changes via ioctls.
729 ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag)
731 struct ieee80211vap *vap;
735 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
736 if (vap->iv_flags_ht & flag) {
741 ic->ic_flags_ht |= flag;
743 ic->ic_flags_ht &= ~flag;
747 ieee80211_syncflag_ht(struct ieee80211vap *vap, int flag)
749 struct ieee80211com *ic = vap->iv_ic;
753 vap->iv_flags_ht &= ~flag;
755 vap->iv_flags_ht |= flag;
756 ieee80211_syncflag_ht_locked(ic, flag);
760 * Synchronize flags_ext bit state in the com structure
761 * according to the state of all vap's. This is used,
762 * for example, to handle state changes via ioctls.
765 ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag)
767 struct ieee80211vap *vap;
771 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
772 if (vap->iv_flags_ext & flag) {
777 ic->ic_flags_ext |= flag;
779 ic->ic_flags_ext &= ~flag;
783 ieee80211_syncflag_ext(struct ieee80211vap *vap, int flag)
785 struct ieee80211com *ic = vap->iv_ic;
789 vap->iv_flags_ext &= ~flag;
791 vap->iv_flags_ext |= flag;
792 ieee80211_syncflag_ext_locked(ic, flag);
796 mapgsm(u_int freq, u_int flags)
799 if (flags & IEEE80211_CHAN_QUARTER)
801 else if (flags & IEEE80211_CHAN_HALF)
805 /* NB: there is no 907/20 wide but leave room */
806 return (freq - 906*10) / 5;
810 mappsb(u_int freq, u_int flags)
812 return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5;
816 * Convert MHz frequency to IEEE channel number.
819 ieee80211_mhz2ieee(u_int freq, u_int flags)
821 #define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990)
822 if (flags & IEEE80211_CHAN_GSM)
823 return mapgsm(freq, flags);
824 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
828 return ((int) freq - 2407) / 5;
830 return 15 + ((freq - 2512) / 20);
831 } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */
833 /* XXX check regdomain? */
834 if (IS_FREQ_IN_PSB(freq))
835 return mappsb(freq, flags);
836 return (freq - 4000) / 5;
838 return (freq - 5000) / 5;
839 } else { /* either, guess */
843 if (907 <= freq && freq <= 922)
844 return mapgsm(freq, flags);
845 return ((int) freq - 2407) / 5;
848 if (IS_FREQ_IN_PSB(freq))
849 return mappsb(freq, flags);
850 else if (freq > 4900)
851 return (freq - 4000) / 5;
853 return 15 + ((freq - 2512) / 20);
855 return (freq - 5000) / 5;
857 #undef IS_FREQ_IN_PSB
861 * Convert channel to IEEE channel number.
864 ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c)
867 if_printf(ic->ic_ifp, "invalid channel (NULL)\n");
870 return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee);
874 * Convert IEEE channel number to MHz frequency.
877 ieee80211_ieee2mhz(u_int chan, u_int flags)
879 if (flags & IEEE80211_CHAN_GSM)
880 return 907 + 5 * (chan / 10);
881 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
885 return 2407 + chan*5;
887 return 2512 + ((chan-15)*20);
888 } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */
889 if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) {
891 return 4940 + chan*5 + (chan % 5 ? 2 : 0);
893 return 5000 + (chan*5);
894 } else { /* either, guess */
895 /* XXX can't distinguish PSB+GSM channels */
898 if (chan < 14) /* 0-13 */
899 return 2407 + chan*5;
900 if (chan < 27) /* 15-26 */
901 return 2512 + ((chan-15)*20);
902 return 5000 + (chan*5);
907 * Locate a channel given a frequency+flags. We cache
908 * the previous lookup to optimize switching between two
909 * channels--as happens with dynamic turbo.
911 struct ieee80211_channel *
912 ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags)
914 struct ieee80211_channel *c;
917 flags &= IEEE80211_CHAN_ALLTURBO;
919 if (c != NULL && c->ic_freq == freq &&
920 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
922 /* brute force search */
923 for (i = 0; i < ic->ic_nchans; i++) {
924 c = &ic->ic_channels[i];
925 if (c->ic_freq == freq &&
926 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
933 * Locate a channel given a channel number+flags. We cache
934 * the previous lookup to optimize switching between two
935 * channels--as happens with dynamic turbo.
937 struct ieee80211_channel *
938 ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags)
940 struct ieee80211_channel *c;
943 flags &= IEEE80211_CHAN_ALLTURBO;
945 if (c != NULL && c->ic_ieee == ieee &&
946 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
948 /* brute force search */
949 for (i = 0; i < ic->ic_nchans; i++) {
950 c = &ic->ic_channels[i];
951 if (c->ic_ieee == ieee &&
952 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
959 addmedia(struct ifmedia *media, int caps, int addsta, int mode, int mword)
961 #define ADD(_ic, _s, _o) \
963 IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL)
964 static const u_int mopts[IEEE80211_MODE_MAX] = {
965 [IEEE80211_MODE_AUTO] = IFM_AUTO,
966 [IEEE80211_MODE_11A] = IFM_IEEE80211_11A,
967 [IEEE80211_MODE_11B] = IFM_IEEE80211_11B,
968 [IEEE80211_MODE_11G] = IFM_IEEE80211_11G,
969 [IEEE80211_MODE_FH] = IFM_IEEE80211_FH,
970 [IEEE80211_MODE_TURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO,
971 [IEEE80211_MODE_TURBO_G] = IFM_IEEE80211_11G|IFM_IEEE80211_TURBO,
972 [IEEE80211_MODE_STURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO,
973 [IEEE80211_MODE_HALF] = IFM_IEEE80211_11A, /* XXX */
974 [IEEE80211_MODE_QUARTER] = IFM_IEEE80211_11A, /* XXX */
975 [IEEE80211_MODE_11NA] = IFM_IEEE80211_11NA,
976 [IEEE80211_MODE_11NG] = IFM_IEEE80211_11NG,
982 ADD(ic, mword, mopt); /* STA mode has no cap */
983 if (caps & IEEE80211_C_IBSS)
984 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC);
985 if (caps & IEEE80211_C_HOSTAP)
986 ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP);
987 if (caps & IEEE80211_C_AHDEMO)
988 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0);
989 if (caps & IEEE80211_C_MONITOR)
990 ADD(media, mword, mopt | IFM_IEEE80211_MONITOR);
991 if (caps & IEEE80211_C_WDS)
992 ADD(media, mword, mopt | IFM_IEEE80211_WDS);
993 if (caps & IEEE80211_C_MBSS)
994 ADD(media, mword, mopt | IFM_IEEE80211_MBSS);
999 * Setup the media data structures according to the channel and
1003 ieee80211_media_setup(struct ieee80211com *ic,
1004 struct ifmedia *media, int caps, int addsta,
1005 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat)
1007 int i, j, mode, rate, maxrate, mword, r;
1008 const struct ieee80211_rateset *rs;
1009 struct ieee80211_rateset allrates;
1012 * Fill in media characteristics.
1014 ifmedia_init(media, 0, media_change, media_stat);
1017 * Add media for legacy operating modes.
1019 memset(&allrates, 0, sizeof(allrates));
1020 for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) {
1021 if (isclr(ic->ic_modecaps, mode))
1023 addmedia(media, caps, addsta, mode, IFM_AUTO);
1024 if (mode == IEEE80211_MODE_AUTO)
1026 rs = &ic->ic_sup_rates[mode];
1027 for (i = 0; i < rs->rs_nrates; i++) {
1028 rate = rs->rs_rates[i];
1029 mword = ieee80211_rate2media(ic, rate, mode);
1032 addmedia(media, caps, addsta, mode, mword);
1034 * Add legacy rate to the collection of all rates.
1036 r = rate & IEEE80211_RATE_VAL;
1037 for (j = 0; j < allrates.rs_nrates; j++)
1038 if (allrates.rs_rates[j] == r)
1040 if (j == allrates.rs_nrates) {
1041 /* unique, add to the set */
1042 allrates.rs_rates[j] = r;
1043 allrates.rs_nrates++;
1045 rate = (rate & IEEE80211_RATE_VAL) / 2;
1050 for (i = 0; i < allrates.rs_nrates; i++) {
1051 mword = ieee80211_rate2media(ic, allrates.rs_rates[i],
1052 IEEE80211_MODE_AUTO);
1055 /* NB: remove media options from mword */
1056 addmedia(media, caps, addsta,
1057 IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword));
1060 * Add HT/11n media. Note that we do not have enough
1061 * bits in the media subtype to express the MCS so we
1062 * use a "placeholder" media subtype and any fixed MCS
1063 * must be specified with a different mechanism.
1065 for (; mode <= IEEE80211_MODE_11NG; mode++) {
1066 if (isclr(ic->ic_modecaps, mode))
1068 addmedia(media, caps, addsta, mode, IFM_AUTO);
1069 addmedia(media, caps, addsta, mode, IFM_IEEE80211_MCS);
1071 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) ||
1072 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) {
1073 addmedia(media, caps, addsta,
1074 IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS);
1075 /* XXX could walk htrates */
1076 /* XXX known array size */
1077 if (ieee80211_htrates[15].ht40_rate_400ns > maxrate)
1078 maxrate = ieee80211_htrates[15].ht40_rate_400ns;
1084 ieee80211_media_init(struct ieee80211com *ic)
1086 struct ifnet *ifp = ic->ic_ifp;
1089 /* NB: this works because the structure is initialized to zero */
1090 if (!LIST_EMPTY(&ic->ic_media.ifm_list)) {
1092 * We are re-initializing the channel list; clear
1093 * the existing media state as the media routines
1094 * don't suppress duplicates.
1096 ifmedia_removeall(&ic->ic_media);
1098 ieee80211_chan_init(ic);
1101 * Recalculate media settings in case new channel list changes
1102 * the set of available modes.
1104 maxrate = ieee80211_media_setup(ic, &ic->ic_media, ic->ic_caps, 1,
1105 ieee80211com_media_change, ieee80211com_media_status);
1106 /* NB: strip explicit mode; we're actually in autoselect */
1107 ifmedia_set(&ic->ic_media,
1108 media_status(ic->ic_opmode, ic->ic_curchan) &~
1109 (IFM_MMASK | IFM_IEEE80211_TURBO));
1111 ifp->if_baudrate = IF_Mbps(maxrate);
1113 /* XXX need to propagate new media settings to vap's */
1116 /* XXX inline or eliminate? */
1117 const struct ieee80211_rateset *
1118 ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c)
1120 /* XXX does this work for 11ng basic rates? */
1121 return &ic->ic_sup_rates[ieee80211_chan2mode(c)];
1125 ieee80211_announce(struct ieee80211com *ic)
1127 struct ifnet *ifp = ic->ic_ifp;
1128 int i, mode, rate, mword;
1129 const struct ieee80211_rateset *rs;
1131 /* NB: skip AUTO since it has no rates */
1132 for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) {
1133 if (isclr(ic->ic_modecaps, mode))
1135 if_printf(ifp, "%s rates: ", ieee80211_phymode_name[mode]);
1136 rs = &ic->ic_sup_rates[mode];
1137 for (i = 0; i < rs->rs_nrates; i++) {
1138 mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode);
1141 rate = ieee80211_media2rate(mword);
1142 kprintf("%s%d%sMbps", (i != 0 ? " " : ""),
1143 rate / 2, ((rate & 0x1) != 0 ? ".5" : ""));
1147 ieee80211_ht_announce(ic);
1151 ieee80211_announce_channels(struct ieee80211com *ic)
1153 const struct ieee80211_channel *c;
1157 kprintf("Chan Freq CW RegPwr MinPwr MaxPwr\n");
1158 for (i = 0; i < ic->ic_nchans; i++) {
1159 c = &ic->ic_channels[i];
1160 if (IEEE80211_IS_CHAN_ST(c))
1162 else if (IEEE80211_IS_CHAN_108A(c))
1164 else if (IEEE80211_IS_CHAN_108G(c))
1166 else if (IEEE80211_IS_CHAN_HT(c))
1168 else if (IEEE80211_IS_CHAN_A(c))
1170 else if (IEEE80211_IS_CHAN_ANYG(c))
1172 else if (IEEE80211_IS_CHAN_B(c))
1176 if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c))
1178 else if (IEEE80211_IS_CHAN_HALF(c))
1180 else if (IEEE80211_IS_CHAN_QUARTER(c))
1184 kprintf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n"
1185 , c->ic_ieee, c->ic_freq, type
1187 , IEEE80211_IS_CHAN_HT40U(c) ? '+' :
1188 IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' '
1190 , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0
1191 , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0
1197 media2mode(const struct ifmedia_entry *ime, uint32_t flags, uint16_t *mode)
1199 switch (IFM_MODE(ime->ifm_media)) {
1200 case IFM_IEEE80211_11A:
1201 *mode = IEEE80211_MODE_11A;
1203 case IFM_IEEE80211_11B:
1204 *mode = IEEE80211_MODE_11B;
1206 case IFM_IEEE80211_11G:
1207 *mode = IEEE80211_MODE_11G;
1209 case IFM_IEEE80211_FH:
1210 *mode = IEEE80211_MODE_FH;
1212 case IFM_IEEE80211_11NA:
1213 *mode = IEEE80211_MODE_11NA;
1215 case IFM_IEEE80211_11NG:
1216 *mode = IEEE80211_MODE_11NG;
1219 *mode = IEEE80211_MODE_AUTO;
1225 * Turbo mode is an ``option''.
1226 * XXX does not apply to AUTO
1228 if (ime->ifm_media & IFM_IEEE80211_TURBO) {
1229 if (*mode == IEEE80211_MODE_11A) {
1230 if (flags & IEEE80211_F_TURBOP)
1231 *mode = IEEE80211_MODE_TURBO_A;
1233 *mode = IEEE80211_MODE_STURBO_A;
1234 } else if (*mode == IEEE80211_MODE_11G)
1235 *mode = IEEE80211_MODE_TURBO_G;
1244 * Handle a media change request on the underlying interface.
1247 ieee80211com_media_change(struct ifnet *ifp)
1253 * Handle a media change request on the vap interface.
1256 ieee80211_media_change(struct ifnet *ifp)
1258 struct ieee80211vap *vap = ifp->if_softc;
1259 struct ifmedia_entry *ime = vap->iv_media.ifm_cur;
1262 if (!media2mode(ime, vap->iv_flags, &newmode))
1264 if (vap->iv_des_mode != newmode) {
1265 vap->iv_des_mode = newmode;
1266 /* XXX kick state machine if up+running */
1272 * Common code to calculate the media status word
1273 * from the operating mode and channel state.
1276 media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan)
1280 status = IFM_IEEE80211;
1282 case IEEE80211_M_STA:
1284 case IEEE80211_M_IBSS:
1285 status |= IFM_IEEE80211_ADHOC;
1287 case IEEE80211_M_HOSTAP:
1288 status |= IFM_IEEE80211_HOSTAP;
1290 case IEEE80211_M_MONITOR:
1291 status |= IFM_IEEE80211_MONITOR;
1293 case IEEE80211_M_AHDEMO:
1294 status |= IFM_IEEE80211_ADHOC | IFM_FLAG0;
1296 case IEEE80211_M_WDS:
1297 status |= IFM_IEEE80211_WDS;
1299 case IEEE80211_M_MBSS:
1300 status |= IFM_IEEE80211_MBSS;
1303 if (IEEE80211_IS_CHAN_HTA(chan)) {
1304 status |= IFM_IEEE80211_11NA;
1305 } else if (IEEE80211_IS_CHAN_HTG(chan)) {
1306 status |= IFM_IEEE80211_11NG;
1307 } else if (IEEE80211_IS_CHAN_A(chan)) {
1308 status |= IFM_IEEE80211_11A;
1309 } else if (IEEE80211_IS_CHAN_B(chan)) {
1310 status |= IFM_IEEE80211_11B;
1311 } else if (IEEE80211_IS_CHAN_ANYG(chan)) {
1312 status |= IFM_IEEE80211_11G;
1313 } else if (IEEE80211_IS_CHAN_FHSS(chan)) {
1314 status |= IFM_IEEE80211_FH;
1316 /* XXX else complain? */
1318 if (IEEE80211_IS_CHAN_TURBO(chan))
1319 status |= IFM_IEEE80211_TURBO;
1321 if (IEEE80211_IS_CHAN_HT20(chan))
1322 status |= IFM_IEEE80211_HT20;
1323 if (IEEE80211_IS_CHAN_HT40(chan))
1324 status |= IFM_IEEE80211_HT40;
1330 ieee80211com_media_status(struct ifnet *ifp, struct ifmediareq *imr)
1332 struct ieee80211com *ic = ifp->if_l2com;
1333 struct ieee80211vap *vap;
1335 imr->ifm_status = IFM_AVALID;
1336 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
1337 if (vap->iv_ifp->if_flags & IFF_UP) {
1338 imr->ifm_status |= IFM_ACTIVE;
1341 imr->ifm_active = media_status(ic->ic_opmode, ic->ic_curchan);
1342 if (imr->ifm_status & IFM_ACTIVE)
1343 imr->ifm_current = imr->ifm_active;
1347 ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr)
1349 struct ieee80211vap *vap = ifp->if_softc;
1350 struct ieee80211com *ic = vap->iv_ic;
1351 enum ieee80211_phymode mode;
1353 imr->ifm_status = IFM_AVALID;
1355 * NB: use the current channel's mode to lock down a xmit
1356 * rate only when running; otherwise we may have a mismatch
1357 * in which case the rate will not be convertible.
1359 if (vap->iv_state == IEEE80211_S_RUN) {
1360 imr->ifm_status |= IFM_ACTIVE;
1361 mode = ieee80211_chan2mode(ic->ic_curchan);
1363 mode = IEEE80211_MODE_AUTO;
1364 imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan);
1366 * Calculate a current rate if possible.
1368 if (vap->iv_txparms[mode].ucastrate != IEEE80211_FIXED_RATE_NONE) {
1370 * A fixed rate is set, report that.
1372 imr->ifm_active |= ieee80211_rate2media(ic,
1373 vap->iv_txparms[mode].ucastrate, mode);
1374 } else if (vap->iv_opmode == IEEE80211_M_STA) {
1376 * In station mode report the current transmit rate.
1378 imr->ifm_active |= ieee80211_rate2media(ic,
1379 vap->iv_bss->ni_txrate, mode);
1381 imr->ifm_active |= IFM_AUTO;
1382 if (imr->ifm_status & IFM_ACTIVE)
1383 imr->ifm_current = imr->ifm_active;
1387 * Set the current phy mode and recalculate the active channel
1388 * set based on the available channels for this mode. Also
1389 * select a new default/current channel if the current one is
1390 * inappropriate for this mode.
1393 ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode)
1396 * Adjust basic rates in 11b/11g supported rate set.
1397 * Note that if operating on a hal/quarter rate channel
1398 * this is a noop as those rates sets are different
1401 if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B)
1402 ieee80211_setbasicrates(&ic->ic_sup_rates[mode], mode);
1404 ic->ic_curmode = mode;
1405 ieee80211_reset_erp(ic); /* reset ERP state */
1411 * Return the phy mode for with the specified channel.
1413 enum ieee80211_phymode
1414 ieee80211_chan2mode(const struct ieee80211_channel *chan)
1417 if (IEEE80211_IS_CHAN_HTA(chan))
1418 return IEEE80211_MODE_11NA;
1419 else if (IEEE80211_IS_CHAN_HTG(chan))
1420 return IEEE80211_MODE_11NG;
1421 else if (IEEE80211_IS_CHAN_108G(chan))
1422 return IEEE80211_MODE_TURBO_G;
1423 else if (IEEE80211_IS_CHAN_ST(chan))
1424 return IEEE80211_MODE_STURBO_A;
1425 else if (IEEE80211_IS_CHAN_TURBO(chan))
1426 return IEEE80211_MODE_TURBO_A;
1427 else if (IEEE80211_IS_CHAN_HALF(chan))
1428 return IEEE80211_MODE_HALF;
1429 else if (IEEE80211_IS_CHAN_QUARTER(chan))
1430 return IEEE80211_MODE_QUARTER;
1431 else if (IEEE80211_IS_CHAN_A(chan))
1432 return IEEE80211_MODE_11A;
1433 else if (IEEE80211_IS_CHAN_ANYG(chan))
1434 return IEEE80211_MODE_11G;
1435 else if (IEEE80211_IS_CHAN_B(chan))
1436 return IEEE80211_MODE_11B;
1437 else if (IEEE80211_IS_CHAN_FHSS(chan))
1438 return IEEE80211_MODE_FH;
1440 /* NB: should not get here */
1441 kprintf("%s: cannot map channel to mode; freq %u flags 0x%x\n",
1442 __func__, chan->ic_freq, chan->ic_flags);
1443 return IEEE80211_MODE_11B;
1447 u_int match; /* rate + mode */
1448 u_int media; /* if_media rate */
1452 findmedia(const struct ratemedia rates[], int n, u_int match)
1456 for (i = 0; i < n; i++)
1457 if (rates[i].match == match)
1458 return rates[i].media;
1463 * Convert IEEE80211 rate value to ifmedia subtype.
1464 * Rate is either a legacy rate in units of 0.5Mbps
1468 ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode)
1470 static const struct ratemedia rates[] = {
1471 { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 },
1472 { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 },
1473 { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 },
1474 { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 },
1475 { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 },
1476 { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 },
1477 { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 },
1478 { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 },
1479 { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 },
1480 { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 },
1481 { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 },
1482 { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 },
1483 { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 },
1484 { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 },
1485 { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 },
1486 { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 },
1487 { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 },
1488 { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 },
1489 { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 },
1490 { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 },
1491 { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 },
1492 { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 },
1493 { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 },
1494 { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 },
1495 { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 },
1496 { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 },
1497 { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 },
1498 { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 },
1499 { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 },
1500 { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 },
1501 /* NB: OFDM72 doesn't realy exist so we don't handle it */
1503 static const struct ratemedia htrates[] = {
1504 { 0, IFM_IEEE80211_MCS },
1505 { 1, IFM_IEEE80211_MCS },
1506 { 2, IFM_IEEE80211_MCS },
1507 { 3, IFM_IEEE80211_MCS },
1508 { 4, IFM_IEEE80211_MCS },
1509 { 5, IFM_IEEE80211_MCS },
1510 { 6, IFM_IEEE80211_MCS },
1511 { 7, IFM_IEEE80211_MCS },
1512 { 8, IFM_IEEE80211_MCS },
1513 { 9, IFM_IEEE80211_MCS },
1514 { 10, IFM_IEEE80211_MCS },
1515 { 11, IFM_IEEE80211_MCS },
1516 { 12, IFM_IEEE80211_MCS },
1517 { 13, IFM_IEEE80211_MCS },
1518 { 14, IFM_IEEE80211_MCS },
1519 { 15, IFM_IEEE80211_MCS },
1524 * Check 11n rates first for match as an MCS.
1526 if (mode == IEEE80211_MODE_11NA) {
1527 if (rate & IEEE80211_RATE_MCS) {
1528 rate &= ~IEEE80211_RATE_MCS;
1529 m = findmedia(htrates, NELEM(htrates), rate);
1531 return m | IFM_IEEE80211_11NA;
1533 } else if (mode == IEEE80211_MODE_11NG) {
1534 /* NB: 12 is ambiguous, it will be treated as an MCS */
1535 if (rate & IEEE80211_RATE_MCS) {
1536 rate &= ~IEEE80211_RATE_MCS;
1537 m = findmedia(htrates, NELEM(htrates), rate);
1539 return m | IFM_IEEE80211_11NG;
1542 rate &= IEEE80211_RATE_VAL;
1544 case IEEE80211_MODE_11A:
1545 case IEEE80211_MODE_HALF: /* XXX good 'nuf */
1546 case IEEE80211_MODE_QUARTER:
1547 case IEEE80211_MODE_11NA:
1548 case IEEE80211_MODE_TURBO_A:
1549 case IEEE80211_MODE_STURBO_A:
1550 return findmedia(rates, NELEM(rates), rate | IFM_IEEE80211_11A);
1551 case IEEE80211_MODE_11B:
1552 return findmedia(rates, NELEM(rates), rate | IFM_IEEE80211_11B);
1553 case IEEE80211_MODE_FH:
1554 return findmedia(rates, NELEM(rates), rate | IFM_IEEE80211_FH);
1555 case IEEE80211_MODE_AUTO:
1556 /* NB: ic may be NULL for some drivers */
1557 if (ic != NULL && ic->ic_phytype == IEEE80211_T_FH)
1558 return findmedia(rates, NELEM(rates),
1559 rate | IFM_IEEE80211_FH);
1560 /* NB: hack, 11g matches both 11b+11a rates */
1562 case IEEE80211_MODE_11G:
1563 case IEEE80211_MODE_11NG:
1564 case IEEE80211_MODE_TURBO_G:
1565 return findmedia(rates, NELEM(rates), rate | IFM_IEEE80211_11G);
1571 ieee80211_media2rate(int mword)
1573 static const int ieeerates[] = {
1577 2, /* IFM_IEEE80211_FH1 */
1578 4, /* IFM_IEEE80211_FH2 */
1579 2, /* IFM_IEEE80211_DS1 */
1580 4, /* IFM_IEEE80211_DS2 */
1581 11, /* IFM_IEEE80211_DS5 */
1582 22, /* IFM_IEEE80211_DS11 */
1583 44, /* IFM_IEEE80211_DS22 */
1584 12, /* IFM_IEEE80211_OFDM6 */
1585 18, /* IFM_IEEE80211_OFDM9 */
1586 24, /* IFM_IEEE80211_OFDM12 */
1587 36, /* IFM_IEEE80211_OFDM18 */
1588 48, /* IFM_IEEE80211_OFDM24 */
1589 72, /* IFM_IEEE80211_OFDM36 */
1590 96, /* IFM_IEEE80211_OFDM48 */
1591 108, /* IFM_IEEE80211_OFDM54 */
1592 144, /* IFM_IEEE80211_OFDM72 */
1593 0, /* IFM_IEEE80211_DS354k */
1594 0, /* IFM_IEEE80211_DS512k */
1595 6, /* IFM_IEEE80211_OFDM3 */
1596 9, /* IFM_IEEE80211_OFDM4 */
1597 54, /* IFM_IEEE80211_OFDM27 */
1598 -1, /* IFM_IEEE80211_MCS */
1600 return IFM_SUBTYPE(mword) < NELEM(ieeerates) ?
1601 ieeerates[IFM_SUBTYPE(mword)] : 0;
1605 * The following hash function is adapted from "Hash Functions" by Bob Jenkins
1606 * ("Algorithm Alley", Dr. Dobbs Journal, September 1997).
1608 #define mix(a, b, c) \
1610 a -= b; a -= c; a ^= (c >> 13); \
1611 b -= c; b -= a; b ^= (a << 8); \
1612 c -= a; c -= b; c ^= (b >> 13); \
1613 a -= b; a -= c; a ^= (c >> 12); \
1614 b -= c; b -= a; b ^= (a << 16); \
1615 c -= a; c -= b; c ^= (b >> 5); \
1616 a -= b; a -= c; a ^= (c >> 3); \
1617 b -= c; b -= a; b ^= (a << 10); \
1618 c -= a; c -= b; c ^= (b >> 15); \
1619 } while (/*CONSTCOND*/0)
1622 ieee80211_mac_hash(const struct ieee80211com *ic,
1623 const uint8_t addr[IEEE80211_ADDR_LEN])
1625 uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = ic->ic_hash_key;