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 $
30 * IEEE 802.11 generic handler
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/kernel.h>
38 #include <sys/socket.h>
39 #include <sys/thread.h>
42 #include <net/if_dl.h>
43 #include <net/if_media.h>
44 #include <net/if_types.h>
45 #include <net/ifq_var.h>
46 #include <net/ethernet.h>
47 #include <net/route.h>
49 #include <netproto/802_11/ieee80211_var.h>
50 #include <netproto/802_11/ieee80211_regdomain.h>
51 #ifdef IEEE80211_SUPPORT_SUPERG
52 #include <netproto/802_11/ieee80211_superg.h>
54 #include <netproto/802_11/ieee80211_ratectl.h>
58 const char *ieee80211_phymode_name[IEEE80211_MODE_MAX] = {
59 [IEEE80211_MODE_AUTO] = "auto",
60 [IEEE80211_MODE_11A] = "11a",
61 [IEEE80211_MODE_11B] = "11b",
62 [IEEE80211_MODE_11G] = "11g",
63 [IEEE80211_MODE_FH] = "FH",
64 [IEEE80211_MODE_TURBO_A] = "turboA",
65 [IEEE80211_MODE_TURBO_G] = "turboG",
66 [IEEE80211_MODE_STURBO_A] = "sturboA",
67 [IEEE80211_MODE_HALF] = "half",
68 [IEEE80211_MODE_QUARTER] = "quarter",
69 [IEEE80211_MODE_11NA] = "11na",
70 [IEEE80211_MODE_11NG] = "11ng",
72 /* map ieee80211_opmode to the corresponding capability bit */
73 const int ieee80211_opcap[IEEE80211_OPMODE_MAX] = {
74 [IEEE80211_M_IBSS] = IEEE80211_C_IBSS,
75 [IEEE80211_M_WDS] = IEEE80211_C_WDS,
76 [IEEE80211_M_STA] = IEEE80211_C_STA,
77 [IEEE80211_M_AHDEMO] = IEEE80211_C_AHDEMO,
78 [IEEE80211_M_HOSTAP] = IEEE80211_C_HOSTAP,
79 [IEEE80211_M_MONITOR] = IEEE80211_C_MONITOR,
80 #ifdef IEEE80211_SUPPORT_MESH
81 [IEEE80211_M_MBSS] = IEEE80211_C_MBSS,
85 static const uint8_t ieee80211broadcastaddr[IEEE80211_ADDR_LEN] =
86 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
88 static void ieee80211_syncflag_locked(struct ieee80211com *ic, int flag);
89 static void ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag);
90 static void ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag);
91 static int ieee80211_media_setup(struct ieee80211com *ic,
92 struct ifmedia *media, int caps, int addsta,
93 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat);
94 static void ieee80211com_media_status(struct ifnet *, struct ifmediareq *);
95 static int ieee80211com_media_change(struct ifnet *);
96 static int media_status(enum ieee80211_opmode,
97 const struct ieee80211_channel *);
99 MALLOC_DEFINE(M_80211_VAP, "80211vap", "802.11 vap state");
102 * Default supported rates for 802.11 operation (in IEEE .5Mb units).
104 #define B(r) ((r) | IEEE80211_RATE_BASIC)
105 static const struct ieee80211_rateset ieee80211_rateset_11a =
106 { 8, { B(12), 18, B(24), 36, B(48), 72, 96, 108 } };
107 static const struct ieee80211_rateset ieee80211_rateset_half =
108 { 8, { B(6), 9, B(12), 18, B(24), 36, 48, 54 } };
109 static const struct ieee80211_rateset ieee80211_rateset_quarter =
110 { 8, { B(3), 4, B(6), 9, B(12), 18, 24, 27 } };
111 static const struct ieee80211_rateset ieee80211_rateset_11b =
112 { 4, { B(2), B(4), B(11), B(22) } };
113 /* NB: OFDM rates are handled specially based on mode */
114 static const struct ieee80211_rateset ieee80211_rateset_11g =
115 { 12, { B(2), B(4), B(11), B(22), 12, 18, 24, 36, 48, 72, 96, 108 } };
118 /* Global token used for wlan layer and wireless NIC driver layer */
119 lwkt_token wlan_token;
122 * Fill in 802.11 available channel set, mark
123 * all available channels as active, and pick
124 * a default channel if not already specified.
127 ieee80211_chan_init(struct ieee80211com *ic)
129 #define DEFAULTRATES(m, def) do { \
130 if (ic->ic_sup_rates[m].rs_nrates == 0) \
131 ic->ic_sup_rates[m] = def; \
133 struct ieee80211_channel *c;
136 KASSERT(0 < ic->ic_nchans && ic->ic_nchans <= IEEE80211_CHAN_MAX,
137 ("invalid number of channels specified: %u", ic->ic_nchans));
138 memset(ic->ic_chan_avail, 0, sizeof(ic->ic_chan_avail));
139 memset(ic->ic_modecaps, 0, sizeof(ic->ic_modecaps));
140 setbit(ic->ic_modecaps, IEEE80211_MODE_AUTO);
141 for (i = 0; i < ic->ic_nchans; i++) {
142 c = &ic->ic_channels[i];
143 KASSERT(c->ic_flags != 0, ("channel with no flags"));
145 * Help drivers that work only with frequencies by filling
146 * in IEEE channel #'s if not already calculated. Note this
147 * mimics similar work done in ieee80211_setregdomain when
148 * changing regulatory state.
151 c->ic_ieee = ieee80211_mhz2ieee(c->ic_freq,c->ic_flags);
152 if (IEEE80211_IS_CHAN_HT40(c) && c->ic_extieee == 0)
153 c->ic_extieee = ieee80211_mhz2ieee(c->ic_freq +
154 (IEEE80211_IS_CHAN_HT40U(c) ? 20 : -20),
156 /* default max tx power to max regulatory */
157 if (c->ic_maxpower == 0)
158 c->ic_maxpower = 2*c->ic_maxregpower;
159 setbit(ic->ic_chan_avail, c->ic_ieee);
161 * Identify mode capabilities.
163 if (IEEE80211_IS_CHAN_A(c))
164 setbit(ic->ic_modecaps, IEEE80211_MODE_11A);
165 if (IEEE80211_IS_CHAN_B(c))
166 setbit(ic->ic_modecaps, IEEE80211_MODE_11B);
167 if (IEEE80211_IS_CHAN_ANYG(c))
168 setbit(ic->ic_modecaps, IEEE80211_MODE_11G);
169 if (IEEE80211_IS_CHAN_FHSS(c))
170 setbit(ic->ic_modecaps, IEEE80211_MODE_FH);
171 if (IEEE80211_IS_CHAN_108A(c))
172 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_A);
173 if (IEEE80211_IS_CHAN_108G(c))
174 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_G);
175 if (IEEE80211_IS_CHAN_ST(c))
176 setbit(ic->ic_modecaps, IEEE80211_MODE_STURBO_A);
177 if (IEEE80211_IS_CHAN_HALF(c))
178 setbit(ic->ic_modecaps, IEEE80211_MODE_HALF);
179 if (IEEE80211_IS_CHAN_QUARTER(c))
180 setbit(ic->ic_modecaps, IEEE80211_MODE_QUARTER);
181 if (IEEE80211_IS_CHAN_HTA(c))
182 setbit(ic->ic_modecaps, IEEE80211_MODE_11NA);
183 if (IEEE80211_IS_CHAN_HTG(c))
184 setbit(ic->ic_modecaps, IEEE80211_MODE_11NG);
186 /* initialize candidate channels to all available */
187 memcpy(ic->ic_chan_active, ic->ic_chan_avail,
188 sizeof(ic->ic_chan_avail));
190 /* sort channel table to allow lookup optimizations */
191 ieee80211_sort_channels(ic->ic_channels, ic->ic_nchans);
193 /* invalidate any previous state */
194 ic->ic_bsschan = IEEE80211_CHAN_ANYC;
195 ic->ic_prevchan = NULL;
196 ic->ic_csa_newchan = NULL;
197 /* arbitrarily pick the first channel */
198 ic->ic_curchan = &ic->ic_channels[0];
199 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
201 /* fillin well-known rate sets if driver has not specified */
202 DEFAULTRATES(IEEE80211_MODE_11B, ieee80211_rateset_11b);
203 DEFAULTRATES(IEEE80211_MODE_11G, ieee80211_rateset_11g);
204 DEFAULTRATES(IEEE80211_MODE_11A, ieee80211_rateset_11a);
205 DEFAULTRATES(IEEE80211_MODE_TURBO_A, ieee80211_rateset_11a);
206 DEFAULTRATES(IEEE80211_MODE_TURBO_G, ieee80211_rateset_11g);
207 DEFAULTRATES(IEEE80211_MODE_STURBO_A, ieee80211_rateset_11a);
208 DEFAULTRATES(IEEE80211_MODE_HALF, ieee80211_rateset_half);
209 DEFAULTRATES(IEEE80211_MODE_QUARTER, ieee80211_rateset_quarter);
210 DEFAULTRATES(IEEE80211_MODE_11NA, ieee80211_rateset_11a);
211 DEFAULTRATES(IEEE80211_MODE_11NG, ieee80211_rateset_11g);
214 * Set auto mode to reset active channel state and any desired channel.
216 (void) ieee80211_setmode(ic, IEEE80211_MODE_AUTO);
221 null_update_mcast(struct ifnet *ifp)
223 if_printf(ifp, "need multicast update callback\n");
227 null_update_promisc(struct ifnet *ifp)
229 if_printf(ifp, "need promiscuous mode update callback\n");
233 null_transmit(struct ifnet *ifp, struct mbuf *m)
236 IFNET_STAT_INC(ifp, oerrors, 1);
237 return EACCES; /* XXX EIO/EPERM? */
241 null_output(struct ifnet *ifp, struct mbuf *m,
242 struct sockaddr *dst, struct rtentry *ro)
244 if_printf(ifp, "discard raw packet\n");
245 return null_transmit(ifp, m);
249 null_input(struct ifnet *ifp, struct mbuf *m)
251 if_printf(ifp, "if_input should not be called\n");
256 * Attach/setup the common net80211 state. Called by
257 * the driver on attach to prior to creating any vap's.
260 ieee80211_ifattach(struct ieee80211com *ic,
261 const uint8_t macaddr[IEEE80211_ADDR_LEN])
263 struct ifnet *ifp = ic->ic_ifp;
264 struct sockaddr_dl *sdl;
267 KASSERT(ifp->if_type == IFT_IEEE80211, ("if_type %d", ifp->if_type));
269 TAILQ_INIT(&ic->ic_vaps);
271 /* Create a taskqueue for all state changes */
272 ic->ic_tq = taskqueue_create("ic_taskq", M_WAITOK | M_ZERO,
273 taskqueue_thread_enqueue, &ic->ic_tq);
274 taskqueue_start_threads(&ic->ic_tq, 1, TDPRI_KERN_DAEMON, -1,
275 "%s taskq", ifp->if_xname);
277 * Fill in 802.11 available channel set, mark all
278 * available channels as active, and pick a default
279 * channel if not already specified.
281 ieee80211_media_init(ic);
283 ic->ic_update_mcast = null_update_mcast;
284 ic->ic_update_promisc = null_update_promisc;
286 ic->ic_hash_key = karc4random();
287 ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT;
288 ic->ic_lintval = ic->ic_bintval;
289 ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX;
291 ieee80211_crypto_attach(ic);
292 ieee80211_node_attach(ic);
293 ieee80211_power_attach(ic);
294 ieee80211_proto_attach(ic);
295 #ifdef IEEE80211_SUPPORT_SUPERG
296 ieee80211_superg_attach(ic);
298 ieee80211_ht_attach(ic);
299 ieee80211_scan_attach(ic);
300 ieee80211_regdomain_attach(ic);
301 ieee80211_dfs_attach(ic);
303 ieee80211_sysctl_attach(ic);
305 ifp->if_addrlen = IEEE80211_ADDR_LEN;
307 if_attach(ifp, NULL);
308 ifp->if_mtu = IEEE80211_MTU_MAX;
309 ifp->if_broadcastaddr = ieee80211broadcastaddr;
310 ifp->if_output = null_output;
311 ifp->if_input = null_input; /* just in case */
312 ifp->if_resolvemulti = NULL; /* NB: callers check */
314 ifa = ifaddr_byindex(ifp->if_index);
315 KASSERT(ifa != NULL, ("%s: no lladdr!", __func__));
316 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
317 sdl->sdl_type = IFT_ETHER; /* XXX IFT_IEEE80211? */
318 sdl->sdl_alen = IEEE80211_ADDR_LEN;
319 IEEE80211_ADDR_COPY(LLADDR(sdl), macaddr);
324 * Detach net80211 state on device detach. Tear down
325 * all vap's and reclaim all common state prior to the
326 * device state going away. Note we may call back into
327 * driver; it must be prepared for this.
330 ieee80211_ifdetach(struct ieee80211com *ic)
332 struct ifnet *ifp = ic->ic_ifp;
333 struct ieee80211vap *vap;
337 while ((vap = TAILQ_FIRST(&ic->ic_vaps)) != NULL)
338 ieee80211_vap_destroy(vap);
339 ieee80211_waitfor_parent(ic);
341 ieee80211_sysctl_detach(ic);
342 ieee80211_dfs_detach(ic);
343 ieee80211_regdomain_detach(ic);
344 ieee80211_scan_detach(ic);
345 #ifdef IEEE80211_SUPPORT_SUPERG
346 ieee80211_superg_detach(ic);
348 ieee80211_ht_detach(ic);
349 /* NB: must be called before ieee80211_node_detach */
350 ieee80211_proto_detach(ic);
351 ieee80211_crypto_detach(ic);
352 ieee80211_power_detach(ic);
353 ieee80211_node_detach(ic);
355 ifmedia_removeall(&ic->ic_media);
356 taskqueue_free(ic->ic_tq);
360 * Default reset method for use with the ioctl support. This
361 * method is invoked after any state change in the 802.11
362 * layer that should be propagated to the hardware but not
363 * require re-initialization of the 802.11 state machine (e.g
364 * rescanning for an ap). We always return ENETRESET which
365 * should cause the driver to re-initialize the device. Drivers
366 * can override this method to implement more optimized support.
369 default_reset(struct ieee80211vap *vap, u_long cmd)
375 * Prepare a vap for use. Drivers use this call to
376 * setup net80211 state in new vap's prior attaching
377 * them with ieee80211_vap_attach (below).
380 ieee80211_vap_setup(struct ieee80211com *ic, struct ieee80211vap *vap,
381 const char name[IFNAMSIZ], int unit, int opmode, int flags,
382 const uint8_t bssid[IEEE80211_ADDR_LEN],
383 const uint8_t macaddr[IEEE80211_ADDR_LEN])
387 ifp = if_alloc(IFT_ETHER);
389 if_printf(ic->ic_ifp, "%s: unable to allocate ifnet\n",
393 if_initname(ifp, name, unit);
394 ifp->if_softc = vap; /* back pointer */
395 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST;
396 ifp->if_start = ieee80211_start;
397 ifp->if_ioctl = ieee80211_ioctl;
398 ifp->if_init = ieee80211_init;
399 /* NB: input+output filled in by ether_ifattach */
400 ifq_set_maxlen(&ifp->if_snd, IFQ_MAXLEN);
401 ifq_set_ready(&ifp->if_snd);
405 vap->iv_flags = ic->ic_flags; /* propagate common flags */
406 vap->iv_flags_ext = ic->ic_flags_ext;
407 vap->iv_flags_ven = ic->ic_flags_ven;
408 vap->iv_caps = ic->ic_caps &~ IEEE80211_C_OPMODE;
409 vap->iv_htcaps = ic->ic_htcaps;
410 vap->iv_opmode = opmode;
411 vap->iv_caps |= ieee80211_opcap[opmode];
413 case IEEE80211_M_WDS:
415 * WDS links must specify the bssid of the far end.
416 * For legacy operation this is a static relationship.
417 * For non-legacy operation the station must associate
418 * and be authorized to pass traffic. Plumbing the
419 * vap to the proper node happens when the vap
420 * transitions to RUN state.
422 IEEE80211_ADDR_COPY(vap->iv_des_bssid, bssid);
423 vap->iv_flags |= IEEE80211_F_DESBSSID;
424 if (flags & IEEE80211_CLONE_WDSLEGACY)
425 vap->iv_flags_ext |= IEEE80211_FEXT_WDSLEGACY;
427 #ifdef IEEE80211_SUPPORT_TDMA
428 case IEEE80211_M_AHDEMO:
429 if (flags & IEEE80211_CLONE_TDMA) {
430 /* NB: checked before clone operation allowed */
431 KASSERT(ic->ic_caps & IEEE80211_C_TDMA,
432 ("not TDMA capable, ic_caps 0x%x", ic->ic_caps));
434 * Propagate TDMA capability to mark vap; this
435 * cannot be removed and is used to distinguish
436 * regular ahdemo operation from ahdemo+tdma.
438 vap->iv_caps |= IEEE80211_C_TDMA;
443 /* auto-enable s/w beacon miss support */
444 if (flags & IEEE80211_CLONE_NOBEACONS)
445 vap->iv_flags_ext |= IEEE80211_FEXT_SWBMISS;
446 /* auto-generated or user supplied MAC address */
447 if (flags & (IEEE80211_CLONE_BSSID|IEEE80211_CLONE_MACADDR))
448 vap->iv_flags_ext |= IEEE80211_FEXT_UNIQMAC;
450 * Enable various functionality by default if we're
451 * capable; the driver can override us if it knows better.
453 if (vap->iv_caps & IEEE80211_C_WME)
454 vap->iv_flags |= IEEE80211_F_WME;
455 if (vap->iv_caps & IEEE80211_C_BURST)
456 vap->iv_flags |= IEEE80211_F_BURST;
459 * NB: bg scanning only makes sense for station mode right now
461 * XXX: bgscan is not necessarily stable, so do not enable it by
462 * default. It messes up atheros drivers for sure.
463 * (tested w/ AR9280).
465 if (vap->iv_opmode == IEEE80211_M_STA &&
466 (vap->iv_caps & IEEE80211_C_BGSCAN))
467 vap->iv_flags |= IEEE80211_F_BGSCAN;
469 vap->iv_flags |= IEEE80211_F_DOTH; /* XXX no cap, just ena */
470 /* NB: DFS support only makes sense for ap mode right now */
471 if (vap->iv_opmode == IEEE80211_M_HOSTAP &&
472 (vap->iv_caps & IEEE80211_C_DFS))
473 vap->iv_flags_ext |= IEEE80211_FEXT_DFS;
475 vap->iv_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */
476 vap->iv_bmissthreshold = IEEE80211_HWBMISS_DEFAULT;
477 vap->iv_dtim_period = IEEE80211_DTIM_DEFAULT;
479 * Install a default reset method for the ioctl support;
480 * the driver can override this.
482 vap->iv_reset = default_reset;
484 IEEE80211_ADDR_COPY(vap->iv_myaddr, macaddr);
486 ieee80211_sysctl_vattach(vap);
487 ieee80211_crypto_vattach(vap);
488 ieee80211_node_vattach(vap);
489 ieee80211_power_vattach(vap);
490 ieee80211_proto_vattach(vap);
491 #ifdef IEEE80211_SUPPORT_SUPERG
492 ieee80211_superg_vattach(vap);
494 ieee80211_ht_vattach(vap);
495 ieee80211_scan_vattach(vap);
496 ieee80211_regdomain_vattach(vap);
497 ieee80211_radiotap_vattach(vap);
498 ieee80211_ratectl_set(vap, IEEE80211_RATECTL_AMRR);
504 * Activate a vap. State should have been prepared with a
505 * call to ieee80211_vap_setup and by the driver. On return
506 * from this call the vap is ready for use.
509 ieee80211_vap_attach(struct ieee80211vap *vap,
510 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat)
512 struct ifnet *ifp = vap->iv_ifp;
513 struct ieee80211com *ic = vap->iv_ic;
514 struct ifmediareq imr;
517 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
518 "%s: %s parent %s flags 0x%x flags_ext 0x%x\n",
519 __func__, ieee80211_opmode_name[vap->iv_opmode],
520 ic->ic_ifp->if_xname, vap->iv_flags, vap->iv_flags_ext);
523 * Do late attach work that cannot happen until after
524 * the driver has had a chance to override defaults.
526 ieee80211_node_latevattach(vap);
527 ieee80211_power_latevattach(vap);
529 maxrate = ieee80211_media_setup(ic, &vap->iv_media, vap->iv_caps,
530 vap->iv_opmode == IEEE80211_M_STA, media_change, media_stat);
531 ieee80211_media_status(ifp, &imr);
532 /* NB: strip explicit mode; we're actually in autoselect */
533 ifmedia_set(&vap->iv_media,
534 imr.ifm_active &~ (IFM_MMASK | IFM_IEEE80211_TURBO));
536 ifp->if_baudrate = IF_Mbps(maxrate);
538 ether_ifattach(ifp, vap->iv_myaddr, &wlan_global_serializer);
539 if (vap->iv_opmode == IEEE80211_M_MONITOR) {
540 /* NB: disallow transmit */
542 ifp->if_transmit = null_transmit;
544 ifp->if_output = null_output;
546 /* hook output method setup by ether_ifattach */
547 vap->iv_output = ifp->if_output;
548 ifp->if_output = ieee80211_output;
550 /* NB: if_mtu set by ether_ifattach to ETHERMTU */
552 TAILQ_INSERT_TAIL(&ic->ic_vaps, vap, iv_next);
553 ieee80211_syncflag_locked(ic, IEEE80211_F_WME);
554 #ifdef IEEE80211_SUPPORT_SUPERG
555 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP);
557 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF);
558 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST);
559 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT);
560 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40);
561 ieee80211_syncifflag_locked(ic, IFF_PROMISC);
562 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI);
568 * Tear down vap state and reclaim the ifnet.
569 * The driver is assumed to have prepared for
570 * this; e.g. by turning off interrupts for the
574 ieee80211_vap_detach(struct ieee80211vap *vap)
576 struct ieee80211com *ic = vap->iv_ic;
577 struct ifnet *ifp = vap->iv_ifp;
579 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s parent %s\n",
580 __func__, ieee80211_opmode_name[vap->iv_opmode],
581 ic->ic_ifp->if_xname);
584 * NB: bpfdetach is called by ether_ifdetach and claims all taps
586 * ether_ifdetach() must be called without the serializer held.
588 wlan_assert_serialized();
589 wlan_serialize_exit(); /* exit to block */
592 wlan_serialize_enter(); /* then reenter */
596 * Flush any deferred vap tasks.
598 wlan_serialize_exit(); /* exit to block */
599 ieee80211_draintask(ic, &vap->iv_nstate_task);
600 ieee80211_draintask(ic, &vap->iv_swbmiss_task);
601 wlan_serialize_enter(); /* then reenter */
604 /* XXX band-aid until ifnet handles this for us */
605 taskqueue_drain(taskqueue_swi, &ifp->if_linktask);
608 KASSERT(vap->iv_state == IEEE80211_S_INIT , ("vap still running"));
609 TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next);
610 ieee80211_syncflag_locked(ic, IEEE80211_F_WME);
611 #ifdef IEEE80211_SUPPORT_SUPERG
612 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP);
614 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF);
615 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST);
616 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT);
617 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40);
618 /* NB: this handles the bpfdetach done below */
619 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_BPF);
620 ieee80211_syncifflag_locked(ic, IFF_PROMISC);
621 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI);
623 ifmedia_removeall(&vap->iv_media);
625 ieee80211_radiotap_vdetach(vap);
626 ieee80211_regdomain_vdetach(vap);
627 ieee80211_scan_vdetach(vap);
628 #ifdef IEEE80211_SUPPORT_SUPERG
629 ieee80211_superg_vdetach(vap);
631 ieee80211_ht_vdetach(vap);
632 /* NB: must be before ieee80211_node_vdetach */
633 ieee80211_proto_vdetach(vap);
634 ieee80211_crypto_vdetach(vap);
635 ieee80211_power_vdetach(vap);
636 ieee80211_node_vdetach(vap);
637 ieee80211_sysctl_vdetach(vap);
643 * Synchronize flag bit state in the parent ifnet structure
644 * according to the state of all vap ifnet's. This is used,
645 * for example, to handle IFF_PROMISC and IFF_ALLMULTI.
648 ieee80211_syncifflag_locked(struct ieee80211com *ic, int flag)
650 struct ifnet *ifp = ic->ic_ifp;
651 struct ieee80211vap *vap;
655 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
656 if (vap->iv_ifp->if_flags & flag) {
658 * XXX the bridge sets PROMISC but we don't want to
659 * enable it on the device, discard here so all the
660 * drivers don't need to special-case it
662 if (flag == IFF_PROMISC &&
663 !(vap->iv_opmode == IEEE80211_M_MONITOR ||
664 (vap->iv_opmode == IEEE80211_M_AHDEMO &&
665 (vap->iv_caps & IEEE80211_C_TDMA) == 0)))
670 oflags = ifp->if_flags;
672 ifp->if_flags |= flag;
674 ifp->if_flags &= ~flag;
675 if ((ifp->if_flags ^ oflags) & flag) {
676 /* XXX should we return 1/0 and let caller do this? */
677 if (ifp->if_flags & IFF_RUNNING) {
678 if (flag == IFF_PROMISC)
679 ieee80211_runtask(ic, &ic->ic_promisc_task);
680 else if (flag == IFF_ALLMULTI)
681 ieee80211_runtask(ic, &ic->ic_mcast_task);
687 * Synchronize flag bit state in the com structure
688 * according to the state of all vap's. This is used,
689 * for example, to handle state changes via ioctls.
692 ieee80211_syncflag_locked(struct ieee80211com *ic, int flag)
694 struct ieee80211vap *vap;
698 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
699 if (vap->iv_flags & flag) {
704 ic->ic_flags |= flag;
706 ic->ic_flags &= ~flag;
710 ieee80211_syncflag(struct ieee80211vap *vap, int flag)
712 struct ieee80211com *ic = vap->iv_ic;
716 vap->iv_flags &= ~flag;
718 vap->iv_flags |= flag;
719 ieee80211_syncflag_locked(ic, flag);
723 * Synchronize flags_ht bit state in the com structure
724 * according to the state of all vap's. This is used,
725 * for example, to handle state changes via ioctls.
728 ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag)
730 struct ieee80211vap *vap;
734 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
735 if (vap->iv_flags_ht & flag) {
740 ic->ic_flags_ht |= flag;
742 ic->ic_flags_ht &= ~flag;
746 ieee80211_syncflag_ht(struct ieee80211vap *vap, int flag)
748 struct ieee80211com *ic = vap->iv_ic;
752 vap->iv_flags_ht &= ~flag;
754 vap->iv_flags_ht |= flag;
755 ieee80211_syncflag_ht_locked(ic, flag);
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;
770 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
771 if (vap->iv_flags_ext & flag) {
776 ic->ic_flags_ext |= flag;
778 ic->ic_flags_ext &= ~flag;
782 ieee80211_syncflag_ext(struct ieee80211vap *vap, int flag)
784 struct ieee80211com *ic = vap->iv_ic;
788 vap->iv_flags_ext &= ~flag;
790 vap->iv_flags_ext |= flag;
791 ieee80211_syncflag_ext_locked(ic, flag);
795 mapgsm(u_int freq, u_int flags)
798 if (flags & IEEE80211_CHAN_QUARTER)
800 else if (flags & IEEE80211_CHAN_HALF)
804 /* NB: there is no 907/20 wide but leave room */
805 return (freq - 906*10) / 5;
809 mappsb(u_int freq, u_int flags)
811 return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5;
815 * Convert MHz frequency to IEEE channel number.
818 ieee80211_mhz2ieee(u_int freq, u_int flags)
820 #define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990)
821 if (flags & IEEE80211_CHAN_GSM)
822 return mapgsm(freq, flags);
823 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
827 return ((int) freq - 2407) / 5;
829 return 15 + ((freq - 2512) / 20);
830 } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */
832 /* XXX check regdomain? */
833 if (IS_FREQ_IN_PSB(freq))
834 return mappsb(freq, flags);
835 return (freq - 4000) / 5;
837 return (freq - 5000) / 5;
838 } else { /* either, guess */
842 if (907 <= freq && freq <= 922)
843 return mapgsm(freq, flags);
844 return ((int) freq - 2407) / 5;
847 if (IS_FREQ_IN_PSB(freq))
848 return mappsb(freq, flags);
849 else if (freq > 4900)
850 return (freq - 4000) / 5;
852 return 15 + ((freq - 2512) / 20);
854 return (freq - 5000) / 5;
856 #undef IS_FREQ_IN_PSB
860 * Convert channel to IEEE channel number.
863 ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c)
866 if_printf(ic->ic_ifp, "invalid channel (NULL)\n");
869 return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee);
873 * Convert IEEE channel number to MHz frequency.
876 ieee80211_ieee2mhz(u_int chan, u_int flags)
878 if (flags & IEEE80211_CHAN_GSM)
879 return 907 + 5 * (chan / 10);
880 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
884 return 2407 + chan*5;
886 return 2512 + ((chan-15)*20);
887 } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */
888 if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) {
890 return 4940 + chan*5 + (chan % 5 ? 2 : 0);
892 return 5000 + (chan*5);
893 } else { /* either, guess */
894 /* XXX can't distinguish PSB+GSM channels */
897 if (chan < 14) /* 0-13 */
898 return 2407 + chan*5;
899 if (chan < 27) /* 15-26 */
900 return 2512 + ((chan-15)*20);
901 return 5000 + (chan*5);
906 * Locate a channel given a frequency+flags. We cache
907 * the previous lookup to optimize switching between two
908 * channels--as happens with dynamic turbo.
910 struct ieee80211_channel *
911 ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags)
913 struct ieee80211_channel *c;
916 flags &= IEEE80211_CHAN_ALLTURBO;
918 if (c != NULL && c->ic_freq == freq &&
919 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
921 /* brute force search */
922 for (i = 0; i < ic->ic_nchans; i++) {
923 c = &ic->ic_channels[i];
924 if (c->ic_freq == freq &&
925 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
932 * Locate a channel given a channel number+flags. We cache
933 * the previous lookup to optimize switching between two
934 * channels--as happens with dynamic turbo.
936 struct ieee80211_channel *
937 ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags)
939 struct ieee80211_channel *c;
942 flags &= IEEE80211_CHAN_ALLTURBO;
944 if (c != NULL && c->ic_ieee == ieee &&
945 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
947 /* brute force search */
948 for (i = 0; i < ic->ic_nchans; i++) {
949 c = &ic->ic_channels[i];
950 if (c->ic_ieee == ieee &&
951 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
958 addmedia(struct ifmedia *media, int caps, int addsta, int mode, int mword)
960 #define ADD(_ic, _s, _o) \
962 IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL)
963 static const u_int mopts[IEEE80211_MODE_MAX] = {
964 [IEEE80211_MODE_AUTO] = IFM_AUTO,
965 [IEEE80211_MODE_11A] = IFM_IEEE80211_11A,
966 [IEEE80211_MODE_11B] = IFM_IEEE80211_11B,
967 [IEEE80211_MODE_11G] = IFM_IEEE80211_11G,
968 [IEEE80211_MODE_FH] = IFM_IEEE80211_FH,
969 [IEEE80211_MODE_TURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO,
970 [IEEE80211_MODE_TURBO_G] = IFM_IEEE80211_11G|IFM_IEEE80211_TURBO,
971 [IEEE80211_MODE_STURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO,
972 [IEEE80211_MODE_HALF] = IFM_IEEE80211_11A, /* XXX */
973 [IEEE80211_MODE_QUARTER] = IFM_IEEE80211_11A, /* XXX */
974 [IEEE80211_MODE_11NA] = IFM_IEEE80211_11NA,
975 [IEEE80211_MODE_11NG] = IFM_IEEE80211_11NG,
981 ADD(ic, mword, mopt); /* STA mode has no cap */
982 if (caps & IEEE80211_C_IBSS)
983 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC);
984 if (caps & IEEE80211_C_HOSTAP)
985 ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP);
986 if (caps & IEEE80211_C_AHDEMO)
987 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0);
988 if (caps & IEEE80211_C_MONITOR)
989 ADD(media, mword, mopt | IFM_IEEE80211_MONITOR);
990 if (caps & IEEE80211_C_WDS)
991 ADD(media, mword, mopt | IFM_IEEE80211_WDS);
992 if (caps & IEEE80211_C_MBSS)
993 ADD(media, mword, mopt | IFM_IEEE80211_MBSS);
998 * Setup the media data structures according to the channel and
1002 ieee80211_media_setup(struct ieee80211com *ic,
1003 struct ifmedia *media, int caps, int addsta,
1004 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat)
1006 int i, j, mode, rate, maxrate, mword, r;
1007 const struct ieee80211_rateset *rs;
1008 struct ieee80211_rateset allrates;
1011 * Fill in media characteristics.
1013 ifmedia_init(media, 0, media_change, media_stat);
1016 * Add media for legacy operating modes.
1018 memset(&allrates, 0, sizeof(allrates));
1019 for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) {
1020 if (isclr(ic->ic_modecaps, mode))
1022 addmedia(media, caps, addsta, mode, IFM_AUTO);
1023 if (mode == IEEE80211_MODE_AUTO)
1025 rs = &ic->ic_sup_rates[mode];
1026 for (i = 0; i < rs->rs_nrates; i++) {
1027 rate = rs->rs_rates[i];
1028 mword = ieee80211_rate2media(ic, rate, mode);
1031 addmedia(media, caps, addsta, mode, mword);
1033 * Add legacy rate to the collection of all rates.
1035 r = rate & IEEE80211_RATE_VAL;
1036 for (j = 0; j < allrates.rs_nrates; j++)
1037 if (allrates.rs_rates[j] == r)
1039 if (j == allrates.rs_nrates) {
1040 /* unique, add to the set */
1041 allrates.rs_rates[j] = r;
1042 allrates.rs_nrates++;
1044 rate = (rate & IEEE80211_RATE_VAL) / 2;
1049 for (i = 0; i < allrates.rs_nrates; i++) {
1050 mword = ieee80211_rate2media(ic, allrates.rs_rates[i],
1051 IEEE80211_MODE_AUTO);
1054 /* NB: remove media options from mword */
1055 addmedia(media, caps, addsta,
1056 IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword));
1059 * Add HT/11n media. Note that we do not have enough
1060 * bits in the media subtype to express the MCS so we
1061 * use a "placeholder" media subtype and any fixed MCS
1062 * must be specified with a different mechanism.
1064 for (; mode <= IEEE80211_MODE_11NG; mode++) {
1065 if (isclr(ic->ic_modecaps, mode))
1067 addmedia(media, caps, addsta, mode, IFM_AUTO);
1068 addmedia(media, caps, addsta, mode, IFM_IEEE80211_MCS);
1070 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) ||
1071 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) {
1072 addmedia(media, caps, addsta,
1073 IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS);
1074 /* XXX could walk htrates */
1075 /* XXX known array size */
1076 if (ieee80211_htrates[15].ht40_rate_400ns > maxrate)
1077 maxrate = ieee80211_htrates[15].ht40_rate_400ns;
1083 ieee80211_media_init(struct ieee80211com *ic)
1085 struct ifnet *ifp = ic->ic_ifp;
1088 /* NB: this works because the structure is initialized to zero */
1089 if (!LIST_EMPTY(&ic->ic_media.ifm_list)) {
1091 * We are re-initializing the channel list; clear
1092 * the existing media state as the media routines
1093 * don't suppress duplicates.
1095 ifmedia_removeall(&ic->ic_media);
1097 ieee80211_chan_init(ic);
1100 * Recalculate media settings in case new channel list changes
1101 * the set of available modes.
1103 maxrate = ieee80211_media_setup(ic, &ic->ic_media, ic->ic_caps, 1,
1104 ieee80211com_media_change, ieee80211com_media_status);
1105 /* NB: strip explicit mode; we're actually in autoselect */
1106 ifmedia_set(&ic->ic_media,
1107 media_status(ic->ic_opmode, ic->ic_curchan) &~
1108 (IFM_MMASK | IFM_IEEE80211_TURBO));
1110 ifp->if_baudrate = IF_Mbps(maxrate);
1112 /* XXX need to propagate new media settings to vap's */
1115 /* XXX inline or eliminate? */
1116 const struct ieee80211_rateset *
1117 ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c)
1119 /* XXX does this work for 11ng basic rates? */
1120 return &ic->ic_sup_rates[ieee80211_chan2mode(c)];
1124 ieee80211_announce(struct ieee80211com *ic)
1126 struct ifnet *ifp = ic->ic_ifp;
1127 int i, mode, rate, mword;
1128 const struct ieee80211_rateset *rs;
1130 /* NB: skip AUTO since it has no rates */
1131 for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) {
1132 if (isclr(ic->ic_modecaps, mode))
1134 if_printf(ifp, "%s rates: ", ieee80211_phymode_name[mode]);
1135 rs = &ic->ic_sup_rates[mode];
1136 for (i = 0; i < rs->rs_nrates; i++) {
1137 mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode);
1140 rate = ieee80211_media2rate(mword);
1141 kprintf("%s%d%sMbps", (i != 0 ? " " : ""),
1142 rate / 2, ((rate & 0x1) != 0 ? ".5" : ""));
1146 ieee80211_ht_announce(ic);
1150 ieee80211_announce_channels(struct ieee80211com *ic)
1152 const struct ieee80211_channel *c;
1156 kprintf("Chan Freq CW RegPwr MinPwr MaxPwr\n");
1157 for (i = 0; i < ic->ic_nchans; i++) {
1158 c = &ic->ic_channels[i];
1159 if (IEEE80211_IS_CHAN_ST(c))
1161 else if (IEEE80211_IS_CHAN_108A(c))
1163 else if (IEEE80211_IS_CHAN_108G(c))
1165 else if (IEEE80211_IS_CHAN_HT(c))
1167 else if (IEEE80211_IS_CHAN_A(c))
1169 else if (IEEE80211_IS_CHAN_ANYG(c))
1171 else if (IEEE80211_IS_CHAN_B(c))
1175 if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c))
1177 else if (IEEE80211_IS_CHAN_HALF(c))
1179 else if (IEEE80211_IS_CHAN_QUARTER(c))
1183 kprintf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n"
1184 , c->ic_ieee, c->ic_freq, type
1186 , IEEE80211_IS_CHAN_HT40U(c) ? '+' :
1187 IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' '
1189 , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0
1190 , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0
1196 media2mode(const struct ifmedia_entry *ime, uint32_t flags, uint16_t *mode)
1198 switch (IFM_MODE(ime->ifm_media)) {
1199 case IFM_IEEE80211_11A:
1200 *mode = IEEE80211_MODE_11A;
1202 case IFM_IEEE80211_11B:
1203 *mode = IEEE80211_MODE_11B;
1205 case IFM_IEEE80211_11G:
1206 *mode = IEEE80211_MODE_11G;
1208 case IFM_IEEE80211_FH:
1209 *mode = IEEE80211_MODE_FH;
1211 case IFM_IEEE80211_11NA:
1212 *mode = IEEE80211_MODE_11NA;
1214 case IFM_IEEE80211_11NG:
1215 *mode = IEEE80211_MODE_11NG;
1218 *mode = IEEE80211_MODE_AUTO;
1224 * Turbo mode is an ``option''.
1225 * XXX does not apply to AUTO
1227 if (ime->ifm_media & IFM_IEEE80211_TURBO) {
1228 if (*mode == IEEE80211_MODE_11A) {
1229 if (flags & IEEE80211_F_TURBOP)
1230 *mode = IEEE80211_MODE_TURBO_A;
1232 *mode = IEEE80211_MODE_STURBO_A;
1233 } else if (*mode == IEEE80211_MODE_11G)
1234 *mode = IEEE80211_MODE_TURBO_G;
1243 * Handle a media change request on the underlying interface.
1246 ieee80211com_media_change(struct ifnet *ifp)
1252 * Handle a media change request on the vap interface.
1255 ieee80211_media_change(struct ifnet *ifp)
1257 struct ieee80211vap *vap = ifp->if_softc;
1258 struct ifmedia_entry *ime = vap->iv_media.ifm_cur;
1261 if (!media2mode(ime, vap->iv_flags, &newmode))
1263 if (vap->iv_des_mode != newmode) {
1264 vap->iv_des_mode = newmode;
1265 /* XXX kick state machine if up+running */
1271 * Common code to calculate the media status word
1272 * from the operating mode and channel state.
1275 media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan)
1279 status = IFM_IEEE80211;
1281 case IEEE80211_M_STA:
1283 case IEEE80211_M_IBSS:
1284 status |= IFM_IEEE80211_ADHOC;
1286 case IEEE80211_M_HOSTAP:
1287 status |= IFM_IEEE80211_HOSTAP;
1289 case IEEE80211_M_MONITOR:
1290 status |= IFM_IEEE80211_MONITOR;
1292 case IEEE80211_M_AHDEMO:
1293 status |= IFM_IEEE80211_ADHOC | IFM_FLAG0;
1295 case IEEE80211_M_WDS:
1296 status |= IFM_IEEE80211_WDS;
1298 case IEEE80211_M_MBSS:
1299 status |= IFM_IEEE80211_MBSS;
1302 if (IEEE80211_IS_CHAN_HTA(chan)) {
1303 status |= IFM_IEEE80211_11NA;
1304 } else if (IEEE80211_IS_CHAN_HTG(chan)) {
1305 status |= IFM_IEEE80211_11NG;
1306 } else if (IEEE80211_IS_CHAN_A(chan)) {
1307 status |= IFM_IEEE80211_11A;
1308 } else if (IEEE80211_IS_CHAN_B(chan)) {
1309 status |= IFM_IEEE80211_11B;
1310 } else if (IEEE80211_IS_CHAN_ANYG(chan)) {
1311 status |= IFM_IEEE80211_11G;
1312 } else if (IEEE80211_IS_CHAN_FHSS(chan)) {
1313 status |= IFM_IEEE80211_FH;
1315 /* XXX else complain? */
1317 if (IEEE80211_IS_CHAN_TURBO(chan))
1318 status |= IFM_IEEE80211_TURBO;
1320 if (IEEE80211_IS_CHAN_HT20(chan))
1321 status |= IFM_IEEE80211_HT20;
1322 if (IEEE80211_IS_CHAN_HT40(chan))
1323 status |= IFM_IEEE80211_HT40;
1329 ieee80211com_media_status(struct ifnet *ifp, struct ifmediareq *imr)
1331 struct ieee80211com *ic = ifp->if_l2com;
1332 struct ieee80211vap *vap;
1334 imr->ifm_status = IFM_AVALID;
1335 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
1336 if (vap->iv_ifp->if_flags & IFF_UP) {
1337 imr->ifm_status |= IFM_ACTIVE;
1340 imr->ifm_active = media_status(ic->ic_opmode, ic->ic_curchan);
1341 if (imr->ifm_status & IFM_ACTIVE)
1342 imr->ifm_current = imr->ifm_active;
1346 ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr)
1348 struct ieee80211vap *vap = ifp->if_softc;
1349 struct ieee80211com *ic = vap->iv_ic;
1350 enum ieee80211_phymode mode;
1352 imr->ifm_status = IFM_AVALID;
1354 * NB: use the current channel's mode to lock down a xmit
1355 * rate only when running; otherwise we may have a mismatch
1356 * in which case the rate will not be convertible.
1358 if (vap->iv_state == IEEE80211_S_RUN) {
1359 imr->ifm_status |= IFM_ACTIVE;
1360 mode = ieee80211_chan2mode(ic->ic_curchan);
1362 mode = IEEE80211_MODE_AUTO;
1363 imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan);
1365 * Calculate a current rate if possible.
1367 if (vap->iv_txparms[mode].ucastrate != IEEE80211_FIXED_RATE_NONE) {
1369 * A fixed rate is set, report that.
1371 imr->ifm_active |= ieee80211_rate2media(ic,
1372 vap->iv_txparms[mode].ucastrate, mode);
1373 } else if (vap->iv_opmode == IEEE80211_M_STA) {
1375 * In station mode report the current transmit rate.
1377 imr->ifm_active |= ieee80211_rate2media(ic,
1378 vap->iv_bss->ni_txrate, mode);
1380 imr->ifm_active |= IFM_AUTO;
1381 if (imr->ifm_status & IFM_ACTIVE)
1382 imr->ifm_current = imr->ifm_active;
1386 * Set the current phy mode and recalculate the active channel
1387 * set based on the available channels for this mode. Also
1388 * select a new default/current channel if the current one is
1389 * inappropriate for this mode.
1392 ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode)
1395 * Adjust basic rates in 11b/11g supported rate set.
1396 * Note that if operating on a hal/quarter rate channel
1397 * this is a noop as those rates sets are different
1400 if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B)
1401 ieee80211_setbasicrates(&ic->ic_sup_rates[mode], mode);
1403 ic->ic_curmode = mode;
1404 ieee80211_reset_erp(ic); /* reset ERP state */
1410 * Return the phy mode for with the specified channel.
1412 enum ieee80211_phymode
1413 ieee80211_chan2mode(const struct ieee80211_channel *chan)
1416 if (IEEE80211_IS_CHAN_HTA(chan))
1417 return IEEE80211_MODE_11NA;
1418 else if (IEEE80211_IS_CHAN_HTG(chan))
1419 return IEEE80211_MODE_11NG;
1420 else if (IEEE80211_IS_CHAN_108G(chan))
1421 return IEEE80211_MODE_TURBO_G;
1422 else if (IEEE80211_IS_CHAN_ST(chan))
1423 return IEEE80211_MODE_STURBO_A;
1424 else if (IEEE80211_IS_CHAN_TURBO(chan))
1425 return IEEE80211_MODE_TURBO_A;
1426 else if (IEEE80211_IS_CHAN_HALF(chan))
1427 return IEEE80211_MODE_HALF;
1428 else if (IEEE80211_IS_CHAN_QUARTER(chan))
1429 return IEEE80211_MODE_QUARTER;
1430 else if (IEEE80211_IS_CHAN_A(chan))
1431 return IEEE80211_MODE_11A;
1432 else if (IEEE80211_IS_CHAN_ANYG(chan))
1433 return IEEE80211_MODE_11G;
1434 else if (IEEE80211_IS_CHAN_B(chan))
1435 return IEEE80211_MODE_11B;
1436 else if (IEEE80211_IS_CHAN_FHSS(chan))
1437 return IEEE80211_MODE_FH;
1439 /* NB: should not get here */
1440 kprintf("%s: cannot map channel to mode; freq %u flags 0x%x\n",
1441 __func__, chan->ic_freq, chan->ic_flags);
1442 return IEEE80211_MODE_11B;
1446 u_int match; /* rate + mode */
1447 u_int media; /* if_media rate */
1451 findmedia(const struct ratemedia rates[], int n, u_int match)
1455 for (i = 0; i < n; i++)
1456 if (rates[i].match == match)
1457 return rates[i].media;
1462 * Convert IEEE80211 rate value to ifmedia subtype.
1463 * Rate is either a legacy rate in units of 0.5Mbps
1467 ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode)
1469 static const struct ratemedia rates[] = {
1470 { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 },
1471 { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 },
1472 { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 },
1473 { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 },
1474 { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 },
1475 { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 },
1476 { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 },
1477 { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 },
1478 { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 },
1479 { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 },
1480 { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 },
1481 { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 },
1482 { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 },
1483 { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 },
1484 { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 },
1485 { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 },
1486 { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 },
1487 { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 },
1488 { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 },
1489 { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 },
1490 { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 },
1491 { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 },
1492 { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 },
1493 { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 },
1494 { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 },
1495 { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 },
1496 { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 },
1497 { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 },
1498 { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 },
1499 { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 },
1500 /* NB: OFDM72 doesn't realy exist so we don't handle it */
1502 static const struct ratemedia htrates[] = {
1503 { 0, IFM_IEEE80211_MCS },
1504 { 1, IFM_IEEE80211_MCS },
1505 { 2, IFM_IEEE80211_MCS },
1506 { 3, IFM_IEEE80211_MCS },
1507 { 4, IFM_IEEE80211_MCS },
1508 { 5, IFM_IEEE80211_MCS },
1509 { 6, IFM_IEEE80211_MCS },
1510 { 7, IFM_IEEE80211_MCS },
1511 { 8, IFM_IEEE80211_MCS },
1512 { 9, IFM_IEEE80211_MCS },
1513 { 10, IFM_IEEE80211_MCS },
1514 { 11, IFM_IEEE80211_MCS },
1515 { 12, IFM_IEEE80211_MCS },
1516 { 13, IFM_IEEE80211_MCS },
1517 { 14, IFM_IEEE80211_MCS },
1518 { 15, IFM_IEEE80211_MCS },
1523 * Check 11n rates first for match as an MCS.
1525 if (mode == IEEE80211_MODE_11NA) {
1526 if (rate & IEEE80211_RATE_MCS) {
1527 rate &= ~IEEE80211_RATE_MCS;
1528 m = findmedia(htrates, NELEM(htrates), rate);
1530 return m | IFM_IEEE80211_11NA;
1532 } else if (mode == IEEE80211_MODE_11NG) {
1533 /* NB: 12 is ambiguous, it will be treated as an MCS */
1534 if (rate & IEEE80211_RATE_MCS) {
1535 rate &= ~IEEE80211_RATE_MCS;
1536 m = findmedia(htrates, NELEM(htrates), rate);
1538 return m | IFM_IEEE80211_11NG;
1541 rate &= IEEE80211_RATE_VAL;
1543 case IEEE80211_MODE_11A:
1544 case IEEE80211_MODE_HALF: /* XXX good 'nuf */
1545 case IEEE80211_MODE_QUARTER:
1546 case IEEE80211_MODE_11NA:
1547 case IEEE80211_MODE_TURBO_A:
1548 case IEEE80211_MODE_STURBO_A:
1549 return findmedia(rates, NELEM(rates), rate | IFM_IEEE80211_11A);
1550 case IEEE80211_MODE_11B:
1551 return findmedia(rates, NELEM(rates), rate | IFM_IEEE80211_11B);
1552 case IEEE80211_MODE_FH:
1553 return findmedia(rates, NELEM(rates), rate | IFM_IEEE80211_FH);
1554 case IEEE80211_MODE_AUTO:
1555 /* NB: ic may be NULL for some drivers */
1556 if (ic != NULL && ic->ic_phytype == IEEE80211_T_FH)
1557 return findmedia(rates, NELEM(rates),
1558 rate | IFM_IEEE80211_FH);
1559 /* NB: hack, 11g matches both 11b+11a rates */
1561 case IEEE80211_MODE_11G:
1562 case IEEE80211_MODE_11NG:
1563 case IEEE80211_MODE_TURBO_G:
1564 return findmedia(rates, NELEM(rates), rate | IFM_IEEE80211_11G);
1570 ieee80211_media2rate(int mword)
1572 static const int ieeerates[] = {
1576 2, /* IFM_IEEE80211_FH1 */
1577 4, /* IFM_IEEE80211_FH2 */
1578 2, /* IFM_IEEE80211_DS1 */
1579 4, /* IFM_IEEE80211_DS2 */
1580 11, /* IFM_IEEE80211_DS5 */
1581 22, /* IFM_IEEE80211_DS11 */
1582 44, /* IFM_IEEE80211_DS22 */
1583 12, /* IFM_IEEE80211_OFDM6 */
1584 18, /* IFM_IEEE80211_OFDM9 */
1585 24, /* IFM_IEEE80211_OFDM12 */
1586 36, /* IFM_IEEE80211_OFDM18 */
1587 48, /* IFM_IEEE80211_OFDM24 */
1588 72, /* IFM_IEEE80211_OFDM36 */
1589 96, /* IFM_IEEE80211_OFDM48 */
1590 108, /* IFM_IEEE80211_OFDM54 */
1591 144, /* IFM_IEEE80211_OFDM72 */
1592 0, /* IFM_IEEE80211_DS354k */
1593 0, /* IFM_IEEE80211_DS512k */
1594 6, /* IFM_IEEE80211_OFDM3 */
1595 9, /* IFM_IEEE80211_OFDM4 */
1596 54, /* IFM_IEEE80211_OFDM27 */
1597 -1, /* IFM_IEEE80211_MCS */
1599 return IFM_SUBTYPE(mword) < NELEM(ieeerates) ?
1600 ieeerates[IFM_SUBTYPE(mword)] : 0;
1604 * The following hash function is adapted from "Hash Functions" by Bob Jenkins
1605 * ("Algorithm Alley", Dr. Dobbs Journal, September 1997).
1607 #define mix(a, b, c) \
1609 a -= b; a -= c; a ^= (c >> 13); \
1610 b -= c; b -= a; b ^= (a << 8); \
1611 c -= a; c -= b; c ^= (b >> 13); \
1612 a -= b; a -= c; a ^= (c >> 12); \
1613 b -= c; b -= a; b ^= (a << 16); \
1614 c -= a; c -= b; c ^= (b >> 5); \
1615 a -= b; a -= c; a ^= (c >> 3); \
1616 b -= c; b -= a; b ^= (a << 10); \
1617 c -= a; c -= b; c ^= (b >> 15); \
1618 } while (/*CONSTCOND*/0)
1621 ieee80211_mac_hash(const struct ieee80211com *ic,
1622 const uint8_t addr[IEEE80211_ADDR_LEN])
1624 uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = ic->ic_hash_key;