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.
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
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>
42 #include <net/if_dl.h>
43 #include <net/if_media.h>
44 #include <net/if_types.h>
45 #include <net/ethernet.h>
47 #include <net80211/ieee80211_var.h>
48 #include <net80211/ieee80211_regdomain.h>
49 #ifdef IEEE80211_SUPPORT_SUPERG
50 #include <net80211/ieee80211_superg.h>
55 const char *ieee80211_phymode_name[IEEE80211_MODE_MAX] = {
56 [IEEE80211_MODE_AUTO] = "auto",
57 [IEEE80211_MODE_11A] = "11a",
58 [IEEE80211_MODE_11B] = "11b",
59 [IEEE80211_MODE_11G] = "11g",
60 [IEEE80211_MODE_FH] = "FH",
61 [IEEE80211_MODE_TURBO_A] = "turboA",
62 [IEEE80211_MODE_TURBO_G] = "turboG",
63 [IEEE80211_MODE_STURBO_A] = "sturboA",
64 [IEEE80211_MODE_HALF] = "half",
65 [IEEE80211_MODE_QUARTER] = "quarter",
66 [IEEE80211_MODE_11NA] = "11na",
67 [IEEE80211_MODE_11NG] = "11ng",
69 /* map ieee80211_opmode to the corresponding capability bit */
70 const int ieee80211_opcap[IEEE80211_OPMODE_MAX] = {
71 [IEEE80211_M_IBSS] = IEEE80211_C_IBSS,
72 [IEEE80211_M_WDS] = IEEE80211_C_WDS,
73 [IEEE80211_M_STA] = IEEE80211_C_STA,
74 [IEEE80211_M_AHDEMO] = IEEE80211_C_AHDEMO,
75 [IEEE80211_M_HOSTAP] = IEEE80211_C_HOSTAP,
76 [IEEE80211_M_MONITOR] = IEEE80211_C_MONITOR,
77 #ifdef IEEE80211_SUPPORT_MESH
78 [IEEE80211_M_MBSS] = IEEE80211_C_MBSS,
82 static const uint8_t ieee80211broadcastaddr[IEEE80211_ADDR_LEN] =
83 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
85 static void ieee80211_syncflag_locked(struct ieee80211com *ic, int flag);
86 static void ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag);
87 static void ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag);
88 static int ieee80211_media_setup(struct ieee80211com *ic,
89 struct ifmedia *media, int caps, int addsta,
90 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat);
91 static void ieee80211com_media_status(struct ifnet *, struct ifmediareq *);
92 static int ieee80211com_media_change(struct ifnet *);
93 static int media_status(enum ieee80211_opmode,
94 const struct ieee80211_channel *);
96 MALLOC_DEFINE(M_80211_VAP, "80211vap", "802.11 vap state");
99 * Default supported rates for 802.11 operation (in IEEE .5Mb units).
101 #define B(r) ((r) | IEEE80211_RATE_BASIC)
102 static const struct ieee80211_rateset ieee80211_rateset_11a =
103 { 8, { B(12), 18, B(24), 36, B(48), 72, 96, 108 } };
104 static const struct ieee80211_rateset ieee80211_rateset_half =
105 { 8, { B(6), 9, B(12), 18, B(24), 36, 48, 54 } };
106 static const struct ieee80211_rateset ieee80211_rateset_quarter =
107 { 8, { B(3), 4, B(6), 9, B(12), 18, 24, 27 } };
108 static const struct ieee80211_rateset ieee80211_rateset_11b =
109 { 4, { B(2), B(4), B(11), B(22) } };
110 /* NB: OFDM rates are handled specially based on mode */
111 static const struct ieee80211_rateset ieee80211_rateset_11g =
112 { 12, { B(2), B(4), B(11), B(22), 12, 18, 24, 36, 48, 72, 96, 108 } };
116 * Fill in 802.11 available channel set, mark
117 * all available channels as active, and pick
118 * a default channel if not already specified.
121 ieee80211_chan_init(struct ieee80211com *ic)
123 #define DEFAULTRATES(m, def) do { \
124 if (ic->ic_sup_rates[m].rs_nrates == 0) \
125 ic->ic_sup_rates[m] = def; \
127 struct ieee80211_channel *c;
130 KASSERT(0 < ic->ic_nchans && ic->ic_nchans <= IEEE80211_CHAN_MAX,
131 ("invalid number of channels specified: %u", ic->ic_nchans));
132 memset(ic->ic_chan_avail, 0, sizeof(ic->ic_chan_avail));
133 memset(ic->ic_modecaps, 0, sizeof(ic->ic_modecaps));
134 setbit(ic->ic_modecaps, IEEE80211_MODE_AUTO);
135 for (i = 0; i < ic->ic_nchans; i++) {
136 c = &ic->ic_channels[i];
137 KASSERT(c->ic_flags != 0, ("channel with no flags"));
139 * Help drivers that work only with frequencies by filling
140 * in IEEE channel #'s if not already calculated. Note this
141 * mimics similar work done in ieee80211_setregdomain when
142 * changing regulatory state.
145 c->ic_ieee = ieee80211_mhz2ieee(c->ic_freq,c->ic_flags);
146 if (IEEE80211_IS_CHAN_HT40(c) && c->ic_extieee == 0)
147 c->ic_extieee = ieee80211_mhz2ieee(c->ic_freq +
148 (IEEE80211_IS_CHAN_HT40U(c) ? 20 : -20),
150 /* default max tx power to max regulatory */
151 if (c->ic_maxpower == 0)
152 c->ic_maxpower = 2*c->ic_maxregpower;
153 setbit(ic->ic_chan_avail, c->ic_ieee);
155 * Identify mode capabilities.
157 if (IEEE80211_IS_CHAN_A(c))
158 setbit(ic->ic_modecaps, IEEE80211_MODE_11A);
159 if (IEEE80211_IS_CHAN_B(c))
160 setbit(ic->ic_modecaps, IEEE80211_MODE_11B);
161 if (IEEE80211_IS_CHAN_ANYG(c))
162 setbit(ic->ic_modecaps, IEEE80211_MODE_11G);
163 if (IEEE80211_IS_CHAN_FHSS(c))
164 setbit(ic->ic_modecaps, IEEE80211_MODE_FH);
165 if (IEEE80211_IS_CHAN_108A(c))
166 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_A);
167 if (IEEE80211_IS_CHAN_108G(c))
168 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_G);
169 if (IEEE80211_IS_CHAN_ST(c))
170 setbit(ic->ic_modecaps, IEEE80211_MODE_STURBO_A);
171 if (IEEE80211_IS_CHAN_HALF(c))
172 setbit(ic->ic_modecaps, IEEE80211_MODE_HALF);
173 if (IEEE80211_IS_CHAN_QUARTER(c))
174 setbit(ic->ic_modecaps, IEEE80211_MODE_QUARTER);
175 if (IEEE80211_IS_CHAN_HTA(c))
176 setbit(ic->ic_modecaps, IEEE80211_MODE_11NA);
177 if (IEEE80211_IS_CHAN_HTG(c))
178 setbit(ic->ic_modecaps, IEEE80211_MODE_11NG);
180 /* initialize candidate channels to all available */
181 memcpy(ic->ic_chan_active, ic->ic_chan_avail,
182 sizeof(ic->ic_chan_avail));
184 /* sort channel table to allow lookup optimizations */
185 ieee80211_sort_channels(ic->ic_channels, ic->ic_nchans);
187 /* invalidate any previous state */
188 ic->ic_bsschan = IEEE80211_CHAN_ANYC;
189 ic->ic_prevchan = NULL;
190 ic->ic_csa_newchan = NULL;
191 /* arbitrarily pick the first channel */
192 ic->ic_curchan = &ic->ic_channels[0];
193 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
195 /* fillin well-known rate sets if driver has not specified */
196 DEFAULTRATES(IEEE80211_MODE_11B, ieee80211_rateset_11b);
197 DEFAULTRATES(IEEE80211_MODE_11G, ieee80211_rateset_11g);
198 DEFAULTRATES(IEEE80211_MODE_11A, ieee80211_rateset_11a);
199 DEFAULTRATES(IEEE80211_MODE_TURBO_A, ieee80211_rateset_11a);
200 DEFAULTRATES(IEEE80211_MODE_TURBO_G, ieee80211_rateset_11g);
201 DEFAULTRATES(IEEE80211_MODE_STURBO_A, ieee80211_rateset_11a);
202 DEFAULTRATES(IEEE80211_MODE_HALF, ieee80211_rateset_half);
203 DEFAULTRATES(IEEE80211_MODE_QUARTER, ieee80211_rateset_quarter);
204 DEFAULTRATES(IEEE80211_MODE_11NA, ieee80211_rateset_11a);
205 DEFAULTRATES(IEEE80211_MODE_11NG, ieee80211_rateset_11g);
208 * Set auto mode to reset active channel state and any desired channel.
210 (void) ieee80211_setmode(ic, IEEE80211_MODE_AUTO);
215 null_update_mcast(struct ifnet *ifp)
217 if_printf(ifp, "need multicast update callback\n");
221 null_update_promisc(struct ifnet *ifp)
223 if_printf(ifp, "need promiscuous mode update callback\n");
227 null_transmit(struct ifnet *ifp, struct mbuf *m)
231 return EACCES; /* XXX EIO/EPERM? */
235 null_output(struct ifnet *ifp, struct mbuf *m,
236 struct sockaddr *dst, struct route *ro)
238 if_printf(ifp, "discard raw packet\n");
239 return null_transmit(ifp, m);
243 null_input(struct ifnet *ifp, struct mbuf *m)
245 if_printf(ifp, "if_input should not be called\n");
250 * Attach/setup the common net80211 state. Called by
251 * the driver on attach to prior to creating any vap's.
254 ieee80211_ifattach(struct ieee80211com *ic,
255 const uint8_t macaddr[IEEE80211_ADDR_LEN])
257 struct ifnet *ifp = ic->ic_ifp;
258 struct sockaddr_dl *sdl;
261 KASSERT(ifp->if_type == IFT_IEEE80211, ("if_type %d", ifp->if_type));
263 IEEE80211_LOCK_INIT(ic, ifp->if_xname);
264 TAILQ_INIT(&ic->ic_vaps);
266 /* Create a taskqueue for all state changes */
267 ic->ic_tq = taskqueue_create("ic_taskq", M_WAITOK | M_ZERO,
268 taskqueue_thread_enqueue, &ic->ic_tq);
269 taskqueue_start_threads(&ic->ic_tq, 1, PI_NET, "%s taskq",
272 * Fill in 802.11 available channel set, mark all
273 * available channels as active, and pick a default
274 * channel if not already specified.
276 ieee80211_media_init(ic);
278 ic->ic_update_mcast = null_update_mcast;
279 ic->ic_update_promisc = null_update_promisc;
281 ic->ic_hash_key = arc4random();
282 ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT;
283 ic->ic_lintval = ic->ic_bintval;
284 ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX;
286 ieee80211_crypto_attach(ic);
287 ieee80211_node_attach(ic);
288 ieee80211_power_attach(ic);
289 ieee80211_proto_attach(ic);
290 #ifdef IEEE80211_SUPPORT_SUPERG
291 ieee80211_superg_attach(ic);
293 ieee80211_ht_attach(ic);
294 ieee80211_scan_attach(ic);
295 ieee80211_regdomain_attach(ic);
296 ieee80211_dfs_attach(ic);
298 ieee80211_sysctl_attach(ic);
300 ifp->if_addrlen = IEEE80211_ADDR_LEN;
303 ifp->if_mtu = IEEE80211_MTU_MAX;
304 ifp->if_broadcastaddr = ieee80211broadcastaddr;
305 ifp->if_output = null_output;
306 ifp->if_input = null_input; /* just in case */
307 ifp->if_resolvemulti = NULL; /* NB: callers check */
309 ifa = ifaddr_byindex(ifp->if_index);
310 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__));
311 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
312 sdl->sdl_type = IFT_ETHER; /* XXX IFT_IEEE80211? */
313 sdl->sdl_alen = IEEE80211_ADDR_LEN;
314 IEEE80211_ADDR_COPY(LLADDR(sdl), macaddr);
319 * Detach net80211 state on device detach. Tear down
320 * all vap's and reclaim all common state prior to the
321 * device state going away. Note we may call back into
322 * driver; it must be prepared for this.
325 ieee80211_ifdetach(struct ieee80211com *ic)
327 struct ifnet *ifp = ic->ic_ifp;
328 struct ieee80211vap *vap;
332 while ((vap = TAILQ_FIRST(&ic->ic_vaps)) != NULL)
333 ieee80211_vap_destroy(vap);
334 ieee80211_waitfor_parent(ic);
336 ieee80211_sysctl_detach(ic);
337 ieee80211_dfs_detach(ic);
338 ieee80211_regdomain_detach(ic);
339 ieee80211_scan_detach(ic);
340 #ifdef IEEE80211_SUPPORT_SUPERG
341 ieee80211_superg_detach(ic);
343 ieee80211_ht_detach(ic);
344 /* NB: must be called before ieee80211_node_detach */
345 ieee80211_proto_detach(ic);
346 ieee80211_crypto_detach(ic);
347 ieee80211_power_detach(ic);
348 ieee80211_node_detach(ic);
350 ifmedia_removeall(&ic->ic_media);
351 taskqueue_free(ic->ic_tq);
352 IEEE80211_LOCK_DESTROY(ic);
356 * Default reset method for use with the ioctl support. This
357 * method is invoked after any state change in the 802.11
358 * layer that should be propagated to the hardware but not
359 * require re-initialization of the 802.11 state machine (e.g
360 * rescanning for an ap). We always return ENETRESET which
361 * should cause the driver to re-initialize the device. Drivers
362 * can override this method to implement more optimized support.
365 default_reset(struct ieee80211vap *vap, u_long cmd)
371 * Prepare a vap for use. Drivers use this call to
372 * setup net80211 state in new vap's prior attaching
373 * them with ieee80211_vap_attach (below).
376 ieee80211_vap_setup(struct ieee80211com *ic, struct ieee80211vap *vap,
377 const char name[IFNAMSIZ], int unit, int opmode, int flags,
378 const uint8_t bssid[IEEE80211_ADDR_LEN],
379 const uint8_t macaddr[IEEE80211_ADDR_LEN])
383 ifp = if_alloc(IFT_ETHER);
385 if_printf(ic->ic_ifp, "%s: unable to allocate ifnet\n",
389 if_initname(ifp, name, unit);
390 ifp->if_softc = vap; /* back pointer */
391 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST;
392 ifp->if_start = ieee80211_start;
393 ifp->if_ioctl = ieee80211_ioctl;
394 ifp->if_watchdog = NULL; /* NB: no watchdog routine */
395 ifp->if_init = ieee80211_init;
396 /* NB: input+output filled in by ether_ifattach */
397 IFQ_SET_MAXLEN(&ifp->if_snd, IFQ_MAXLEN);
398 ifp->if_snd.ifq_drv_maxlen = IFQ_MAXLEN;
399 IFQ_SET_READY(&ifp->if_snd);
403 vap->iv_flags = ic->ic_flags; /* propagate common flags */
404 vap->iv_flags_ext = ic->ic_flags_ext;
405 vap->iv_flags_ven = ic->ic_flags_ven;
406 vap->iv_caps = ic->ic_caps &~ IEEE80211_C_OPMODE;
407 vap->iv_htcaps = ic->ic_htcaps;
408 vap->iv_opmode = opmode;
409 vap->iv_caps |= ieee80211_opcap[opmode];
411 case IEEE80211_M_WDS:
413 * WDS links must specify the bssid of the far end.
414 * For legacy operation this is a static relationship.
415 * For non-legacy operation the station must associate
416 * and be authorized to pass traffic. Plumbing the
417 * vap to the proper node happens when the vap
418 * transitions to RUN state.
420 IEEE80211_ADDR_COPY(vap->iv_des_bssid, bssid);
421 vap->iv_flags |= IEEE80211_F_DESBSSID;
422 if (flags & IEEE80211_CLONE_WDSLEGACY)
423 vap->iv_flags_ext |= IEEE80211_FEXT_WDSLEGACY;
425 #ifdef IEEE80211_SUPPORT_TDMA
426 case IEEE80211_M_AHDEMO:
427 if (flags & IEEE80211_CLONE_TDMA) {
428 /* NB: checked before clone operation allowed */
429 KASSERT(ic->ic_caps & IEEE80211_C_TDMA,
430 ("not TDMA capable, ic_caps 0x%x", ic->ic_caps));
432 * Propagate TDMA capability to mark vap; this
433 * cannot be removed and is used to distinguish
434 * regular ahdemo operation from ahdemo+tdma.
436 vap->iv_caps |= IEEE80211_C_TDMA;
441 /* auto-enable s/w beacon miss support */
442 if (flags & IEEE80211_CLONE_NOBEACONS)
443 vap->iv_flags_ext |= IEEE80211_FEXT_SWBMISS;
445 * Enable various functionality by default if we're
446 * capable; the driver can override us if it knows better.
448 if (vap->iv_caps & IEEE80211_C_WME)
449 vap->iv_flags |= IEEE80211_F_WME;
450 if (vap->iv_caps & IEEE80211_C_BURST)
451 vap->iv_flags |= IEEE80211_F_BURST;
452 /* NB: bg scanning only makes sense for station mode right now */
453 if (vap->iv_opmode == IEEE80211_M_STA &&
454 (vap->iv_caps & IEEE80211_C_BGSCAN))
455 vap->iv_flags |= IEEE80211_F_BGSCAN;
456 vap->iv_flags |= IEEE80211_F_DOTH; /* XXX no cap, just ena */
457 /* NB: DFS support only makes sense for ap mode right now */
458 if (vap->iv_opmode == IEEE80211_M_HOSTAP &&
459 (vap->iv_caps & IEEE80211_C_DFS))
460 vap->iv_flags_ext |= IEEE80211_FEXT_DFS;
462 vap->iv_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */
463 vap->iv_bmissthreshold = IEEE80211_HWBMISS_DEFAULT;
464 vap->iv_dtim_period = IEEE80211_DTIM_DEFAULT;
466 * Install a default reset method for the ioctl support;
467 * the driver can override this.
469 vap->iv_reset = default_reset;
471 IEEE80211_ADDR_COPY(vap->iv_myaddr, macaddr);
473 ieee80211_sysctl_vattach(vap);
474 ieee80211_crypto_vattach(vap);
475 ieee80211_node_vattach(vap);
476 ieee80211_power_vattach(vap);
477 ieee80211_proto_vattach(vap);
478 #ifdef IEEE80211_SUPPORT_SUPERG
479 ieee80211_superg_vattach(vap);
481 ieee80211_ht_vattach(vap);
482 ieee80211_scan_vattach(vap);
483 ieee80211_regdomain_vattach(vap);
484 ieee80211_radiotap_vattach(vap);
490 * Activate a vap. State should have been prepared with a
491 * call to ieee80211_vap_setup and by the driver. On return
492 * from this call the vap is ready for use.
495 ieee80211_vap_attach(struct ieee80211vap *vap,
496 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat)
498 struct ifnet *ifp = vap->iv_ifp;
499 struct ieee80211com *ic = vap->iv_ic;
500 struct ifmediareq imr;
503 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
504 "%s: %s parent %s flags 0x%x flags_ext 0x%x\n",
505 __func__, ieee80211_opmode_name[vap->iv_opmode],
506 ic->ic_ifp->if_xname, vap->iv_flags, vap->iv_flags_ext);
509 * Do late attach work that cannot happen until after
510 * the driver has had a chance to override defaults.
512 ieee80211_node_latevattach(vap);
513 ieee80211_power_latevattach(vap);
515 maxrate = ieee80211_media_setup(ic, &vap->iv_media, vap->iv_caps,
516 vap->iv_opmode == IEEE80211_M_STA, media_change, media_stat);
517 ieee80211_media_status(ifp, &imr);
518 /* NB: strip explicit mode; we're actually in autoselect */
519 ifmedia_set(&vap->iv_media,
520 imr.ifm_active &~ (IFM_MMASK | IFM_IEEE80211_TURBO));
522 ifp->if_baudrate = IF_Mbps(maxrate);
524 ether_ifattach(ifp, vap->iv_myaddr);
525 if (vap->iv_opmode == IEEE80211_M_MONITOR) {
526 /* NB: disallow transmit */
527 ifp->if_transmit = null_transmit;
528 ifp->if_output = null_output;
530 /* hook output method setup by ether_ifattach */
531 vap->iv_output = ifp->if_output;
532 ifp->if_output = ieee80211_output;
534 /* NB: if_mtu set by ether_ifattach to ETHERMTU */
537 TAILQ_INSERT_TAIL(&ic->ic_vaps, vap, iv_next);
538 ieee80211_syncflag_locked(ic, IEEE80211_F_WME);
539 #ifdef IEEE80211_SUPPORT_SUPERG
540 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP);
542 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF);
543 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST);
544 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT);
545 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40);
546 ieee80211_syncifflag_locked(ic, IFF_PROMISC);
547 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI);
548 IEEE80211_UNLOCK(ic);
554 * Tear down vap state and reclaim the ifnet.
555 * The driver is assumed to have prepared for
556 * this; e.g. by turning off interrupts for the
560 ieee80211_vap_detach(struct ieee80211vap *vap)
562 struct ieee80211com *ic = vap->iv_ic;
563 struct ifnet *ifp = vap->iv_ifp;
565 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s parent %s\n",
566 __func__, ieee80211_opmode_name[vap->iv_opmode],
567 ic->ic_ifp->if_xname);
569 /* NB: bpfdetach is called by ether_ifdetach and claims all taps */
575 * Flush any deferred vap tasks.
576 * NB: must be before ether_ifdetach() and removal from ic_vaps list
578 ieee80211_draintask(ic, &vap->iv_nstate_task);
579 ieee80211_draintask(ic, &vap->iv_swbmiss_task);
582 KASSERT(vap->iv_state == IEEE80211_S_INIT , ("vap still running"));
583 TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next);
584 ieee80211_syncflag_locked(ic, IEEE80211_F_WME);
585 #ifdef IEEE80211_SUPPORT_SUPERG
586 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP);
588 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF);
589 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST);
590 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT);
591 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40);
592 /* NB: this handles the bpfdetach done below */
593 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_BPF);
594 ieee80211_syncifflag_locked(ic, IFF_PROMISC);
595 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI);
596 IEEE80211_UNLOCK(ic);
598 ifmedia_removeall(&vap->iv_media);
600 ieee80211_radiotap_vdetach(vap);
601 ieee80211_regdomain_vdetach(vap);
602 ieee80211_scan_vdetach(vap);
603 #ifdef IEEE80211_SUPPORT_SUPERG
604 ieee80211_superg_vdetach(vap);
606 ieee80211_ht_vdetach(vap);
607 /* NB: must be before ieee80211_node_vdetach */
608 ieee80211_proto_vdetach(vap);
609 ieee80211_crypto_vdetach(vap);
610 ieee80211_power_vdetach(vap);
611 ieee80211_node_vdetach(vap);
612 ieee80211_sysctl_vdetach(vap);
618 * Synchronize flag bit state in the parent ifnet structure
619 * according to the state of all vap ifnet's. This is used,
620 * for example, to handle IFF_PROMISC and IFF_ALLMULTI.
623 ieee80211_syncifflag_locked(struct ieee80211com *ic, int flag)
625 struct ifnet *ifp = ic->ic_ifp;
626 struct ieee80211vap *vap;
629 IEEE80211_LOCK_ASSERT(ic);
632 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
633 if (vap->iv_ifp->if_flags & flag) {
635 * XXX the bridge sets PROMISC but we don't want to
636 * enable it on the device, discard here so all the
637 * drivers don't need to special-case it
639 if (flag == IFF_PROMISC &&
640 !(vap->iv_opmode == IEEE80211_M_MONITOR ||
641 (vap->iv_opmode == IEEE80211_M_AHDEMO &&
642 (vap->iv_caps & IEEE80211_C_TDMA) == 0)))
647 oflags = ifp->if_flags;
649 ifp->if_flags |= flag;
651 ifp->if_flags &= ~flag;
652 if ((ifp->if_flags ^ oflags) & flag) {
653 /* XXX should we return 1/0 and let caller do this? */
654 if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
655 if (flag == IFF_PROMISC)
656 ieee80211_runtask(ic, &ic->ic_promisc_task);
657 else if (flag == IFF_ALLMULTI)
658 ieee80211_runtask(ic, &ic->ic_mcast_task);
664 * Synchronize flag bit state in the com structure
665 * according to the state of all vap's. This is used,
666 * for example, to handle state changes via ioctls.
669 ieee80211_syncflag_locked(struct ieee80211com *ic, int flag)
671 struct ieee80211vap *vap;
674 IEEE80211_LOCK_ASSERT(ic);
677 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
678 if (vap->iv_flags & flag) {
683 ic->ic_flags |= flag;
685 ic->ic_flags &= ~flag;
689 ieee80211_syncflag(struct ieee80211vap *vap, int flag)
691 struct ieee80211com *ic = vap->iv_ic;
696 vap->iv_flags &= ~flag;
698 vap->iv_flags |= flag;
699 ieee80211_syncflag_locked(ic, flag);
700 IEEE80211_UNLOCK(ic);
704 * Synchronize flags_ht bit state in the com structure
705 * according to the state of all vap's. This is used,
706 * for example, to handle state changes via ioctls.
709 ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag)
711 struct ieee80211vap *vap;
714 IEEE80211_LOCK_ASSERT(ic);
717 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
718 if (vap->iv_flags_ht & flag) {
723 ic->ic_flags_ht |= flag;
725 ic->ic_flags_ht &= ~flag;
729 ieee80211_syncflag_ht(struct ieee80211vap *vap, int flag)
731 struct ieee80211com *ic = vap->iv_ic;
736 vap->iv_flags_ht &= ~flag;
738 vap->iv_flags_ht |= flag;
739 ieee80211_syncflag_ht_locked(ic, flag);
740 IEEE80211_UNLOCK(ic);
744 * Synchronize flags_ext bit state in the com structure
745 * according to the state of all vap's. This is used,
746 * for example, to handle state changes via ioctls.
749 ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag)
751 struct ieee80211vap *vap;
754 IEEE80211_LOCK_ASSERT(ic);
757 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
758 if (vap->iv_flags_ext & flag) {
763 ic->ic_flags_ext |= flag;
765 ic->ic_flags_ext &= ~flag;
769 ieee80211_syncflag_ext(struct ieee80211vap *vap, int flag)
771 struct ieee80211com *ic = vap->iv_ic;
776 vap->iv_flags_ext &= ~flag;
778 vap->iv_flags_ext |= flag;
779 ieee80211_syncflag_ext_locked(ic, flag);
780 IEEE80211_UNLOCK(ic);
784 mapgsm(u_int freq, u_int flags)
787 if (flags & IEEE80211_CHAN_QUARTER)
789 else if (flags & IEEE80211_CHAN_HALF)
793 /* NB: there is no 907/20 wide but leave room */
794 return (freq - 906*10) / 5;
798 mappsb(u_int freq, u_int flags)
800 return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5;
804 * Convert MHz frequency to IEEE channel number.
807 ieee80211_mhz2ieee(u_int freq, u_int flags)
809 #define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990)
810 if (flags & IEEE80211_CHAN_GSM)
811 return mapgsm(freq, flags);
812 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
816 return ((int) freq - 2407) / 5;
818 return 15 + ((freq - 2512) / 20);
819 } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */
821 /* XXX check regdomain? */
822 if (IS_FREQ_IN_PSB(freq))
823 return mappsb(freq, flags);
824 return (freq - 4000) / 5;
826 return (freq - 5000) / 5;
827 } else { /* either, guess */
831 if (907 <= freq && freq <= 922)
832 return mapgsm(freq, flags);
833 return ((int) freq - 2407) / 5;
836 if (IS_FREQ_IN_PSB(freq))
837 return mappsb(freq, flags);
838 else if (freq > 4900)
839 return (freq - 4000) / 5;
841 return 15 + ((freq - 2512) / 20);
843 return (freq - 5000) / 5;
845 #undef IS_FREQ_IN_PSB
849 * Convert channel to IEEE channel number.
852 ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c)
855 if_printf(ic->ic_ifp, "invalid channel (NULL)\n");
858 return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee);
862 * Convert IEEE channel number to MHz frequency.
865 ieee80211_ieee2mhz(u_int chan, u_int flags)
867 if (flags & IEEE80211_CHAN_GSM)
868 return 907 + 5 * (chan / 10);
869 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
873 return 2407 + chan*5;
875 return 2512 + ((chan-15)*20);
876 } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */
877 if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) {
879 return 4940 + chan*5 + (chan % 5 ? 2 : 0);
881 return 5000 + (chan*5);
882 } else { /* either, guess */
883 /* XXX can't distinguish PSB+GSM channels */
886 if (chan < 14) /* 0-13 */
887 return 2407 + chan*5;
888 if (chan < 27) /* 15-26 */
889 return 2512 + ((chan-15)*20);
890 return 5000 + (chan*5);
895 * Locate a channel given a frequency+flags. We cache
896 * the previous lookup to optimize switching between two
897 * channels--as happens with dynamic turbo.
899 struct ieee80211_channel *
900 ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags)
902 struct ieee80211_channel *c;
905 flags &= IEEE80211_CHAN_ALLTURBO;
907 if (c != NULL && c->ic_freq == freq &&
908 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
910 /* brute force search */
911 for (i = 0; i < ic->ic_nchans; i++) {
912 c = &ic->ic_channels[i];
913 if (c->ic_freq == freq &&
914 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
921 * Locate a channel given a channel number+flags. We cache
922 * the previous lookup to optimize switching between two
923 * channels--as happens with dynamic turbo.
925 struct ieee80211_channel *
926 ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags)
928 struct ieee80211_channel *c;
931 flags &= IEEE80211_CHAN_ALLTURBO;
933 if (c != NULL && c->ic_ieee == ieee &&
934 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
936 /* brute force search */
937 for (i = 0; i < ic->ic_nchans; i++) {
938 c = &ic->ic_channels[i];
939 if (c->ic_ieee == ieee &&
940 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
947 addmedia(struct ifmedia *media, int caps, int addsta, int mode, int mword)
949 #define ADD(_ic, _s, _o) \
951 IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL)
952 static const u_int mopts[IEEE80211_MODE_MAX] = {
953 [IEEE80211_MODE_AUTO] = IFM_AUTO,
954 [IEEE80211_MODE_11A] = IFM_IEEE80211_11A,
955 [IEEE80211_MODE_11B] = IFM_IEEE80211_11B,
956 [IEEE80211_MODE_11G] = IFM_IEEE80211_11G,
957 [IEEE80211_MODE_FH] = IFM_IEEE80211_FH,
958 [IEEE80211_MODE_TURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO,
959 [IEEE80211_MODE_TURBO_G] = IFM_IEEE80211_11G|IFM_IEEE80211_TURBO,
960 [IEEE80211_MODE_STURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO,
961 [IEEE80211_MODE_HALF] = IFM_IEEE80211_11A, /* XXX */
962 [IEEE80211_MODE_QUARTER] = IFM_IEEE80211_11A, /* XXX */
963 [IEEE80211_MODE_11NA] = IFM_IEEE80211_11NA,
964 [IEEE80211_MODE_11NG] = IFM_IEEE80211_11NG,
970 ADD(ic, mword, mopt); /* STA mode has no cap */
971 if (caps & IEEE80211_C_IBSS)
972 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC);
973 if (caps & IEEE80211_C_HOSTAP)
974 ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP);
975 if (caps & IEEE80211_C_AHDEMO)
976 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0);
977 if (caps & IEEE80211_C_MONITOR)
978 ADD(media, mword, mopt | IFM_IEEE80211_MONITOR);
979 if (caps & IEEE80211_C_WDS)
980 ADD(media, mword, mopt | IFM_IEEE80211_WDS);
981 if (caps & IEEE80211_C_MBSS)
982 ADD(media, mword, mopt | IFM_IEEE80211_MBSS);
987 * Setup the media data structures according to the channel and
991 ieee80211_media_setup(struct ieee80211com *ic,
992 struct ifmedia *media, int caps, int addsta,
993 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat)
995 int i, j, mode, rate, maxrate, mword, r;
996 const struct ieee80211_rateset *rs;
997 struct ieee80211_rateset allrates;
1000 * Fill in media characteristics.
1002 ifmedia_init(media, 0, media_change, media_stat);
1005 * Add media for legacy operating modes.
1007 memset(&allrates, 0, sizeof(allrates));
1008 for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) {
1009 if (isclr(ic->ic_modecaps, mode))
1011 addmedia(media, caps, addsta, mode, IFM_AUTO);
1012 if (mode == IEEE80211_MODE_AUTO)
1014 rs = &ic->ic_sup_rates[mode];
1015 for (i = 0; i < rs->rs_nrates; i++) {
1016 rate = rs->rs_rates[i];
1017 mword = ieee80211_rate2media(ic, rate, mode);
1020 addmedia(media, caps, addsta, mode, mword);
1022 * Add legacy rate to the collection of all rates.
1024 r = rate & IEEE80211_RATE_VAL;
1025 for (j = 0; j < allrates.rs_nrates; j++)
1026 if (allrates.rs_rates[j] == r)
1028 if (j == allrates.rs_nrates) {
1029 /* unique, add to the set */
1030 allrates.rs_rates[j] = r;
1031 allrates.rs_nrates++;
1033 rate = (rate & IEEE80211_RATE_VAL) / 2;
1038 for (i = 0; i < allrates.rs_nrates; i++) {
1039 mword = ieee80211_rate2media(ic, allrates.rs_rates[i],
1040 IEEE80211_MODE_AUTO);
1043 /* NB: remove media options from mword */
1044 addmedia(media, caps, addsta,
1045 IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword));
1048 * Add HT/11n media. Note that we do not have enough
1049 * bits in the media subtype to express the MCS so we
1050 * use a "placeholder" media subtype and any fixed MCS
1051 * must be specified with a different mechanism.
1053 for (; mode <= IEEE80211_MODE_11NG; mode++) {
1054 if (isclr(ic->ic_modecaps, mode))
1056 addmedia(media, caps, addsta, mode, IFM_AUTO);
1057 addmedia(media, caps, addsta, mode, IFM_IEEE80211_MCS);
1059 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) ||
1060 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) {
1061 addmedia(media, caps, addsta,
1062 IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS);
1063 /* XXX could walk htrates */
1064 /* XXX known array size */
1065 if (ieee80211_htrates[15].ht40_rate_400ns > maxrate)
1066 maxrate = ieee80211_htrates[15].ht40_rate_400ns;
1072 ieee80211_media_init(struct ieee80211com *ic)
1074 struct ifnet *ifp = ic->ic_ifp;
1077 /* NB: this works because the structure is initialized to zero */
1078 if (!LIST_EMPTY(&ic->ic_media.ifm_list)) {
1080 * We are re-initializing the channel list; clear
1081 * the existing media state as the media routines
1082 * don't suppress duplicates.
1084 ifmedia_removeall(&ic->ic_media);
1086 ieee80211_chan_init(ic);
1089 * Recalculate media settings in case new channel list changes
1090 * the set of available modes.
1092 maxrate = ieee80211_media_setup(ic, &ic->ic_media, ic->ic_caps, 1,
1093 ieee80211com_media_change, ieee80211com_media_status);
1094 /* NB: strip explicit mode; we're actually in autoselect */
1095 ifmedia_set(&ic->ic_media,
1096 media_status(ic->ic_opmode, ic->ic_curchan) &~
1097 (IFM_MMASK | IFM_IEEE80211_TURBO));
1099 ifp->if_baudrate = IF_Mbps(maxrate);
1101 /* XXX need to propagate new media settings to vap's */
1104 /* XXX inline or eliminate? */
1105 const struct ieee80211_rateset *
1106 ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c)
1108 /* XXX does this work for 11ng basic rates? */
1109 return &ic->ic_sup_rates[ieee80211_chan2mode(c)];
1113 ieee80211_announce(struct ieee80211com *ic)
1115 struct ifnet *ifp = ic->ic_ifp;
1116 int i, mode, rate, mword;
1117 const struct ieee80211_rateset *rs;
1119 /* NB: skip AUTO since it has no rates */
1120 for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) {
1121 if (isclr(ic->ic_modecaps, mode))
1123 if_printf(ifp, "%s rates: ", ieee80211_phymode_name[mode]);
1124 rs = &ic->ic_sup_rates[mode];
1125 for (i = 0; i < rs->rs_nrates; i++) {
1126 mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode);
1129 rate = ieee80211_media2rate(mword);
1130 printf("%s%d%sMbps", (i != 0 ? " " : ""),
1131 rate / 2, ((rate & 0x1) != 0 ? ".5" : ""));
1135 ieee80211_ht_announce(ic);
1139 ieee80211_announce_channels(struct ieee80211com *ic)
1141 const struct ieee80211_channel *c;
1145 printf("Chan Freq CW RegPwr MinPwr MaxPwr\n");
1146 for (i = 0; i < ic->ic_nchans; i++) {
1147 c = &ic->ic_channels[i];
1148 if (IEEE80211_IS_CHAN_ST(c))
1150 else if (IEEE80211_IS_CHAN_108A(c))
1152 else if (IEEE80211_IS_CHAN_108G(c))
1154 else if (IEEE80211_IS_CHAN_HT(c))
1156 else if (IEEE80211_IS_CHAN_A(c))
1158 else if (IEEE80211_IS_CHAN_ANYG(c))
1160 else if (IEEE80211_IS_CHAN_B(c))
1164 if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c))
1166 else if (IEEE80211_IS_CHAN_HALF(c))
1168 else if (IEEE80211_IS_CHAN_QUARTER(c))
1172 printf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n"
1173 , c->ic_ieee, c->ic_freq, type
1175 , IEEE80211_IS_CHAN_HT40U(c) ? '+' :
1176 IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' '
1178 , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0
1179 , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0
1185 media2mode(const struct ifmedia_entry *ime, uint32_t flags, uint16_t *mode)
1187 switch (IFM_MODE(ime->ifm_media)) {
1188 case IFM_IEEE80211_11A:
1189 *mode = IEEE80211_MODE_11A;
1191 case IFM_IEEE80211_11B:
1192 *mode = IEEE80211_MODE_11B;
1194 case IFM_IEEE80211_11G:
1195 *mode = IEEE80211_MODE_11G;
1197 case IFM_IEEE80211_FH:
1198 *mode = IEEE80211_MODE_FH;
1200 case IFM_IEEE80211_11NA:
1201 *mode = IEEE80211_MODE_11NA;
1203 case IFM_IEEE80211_11NG:
1204 *mode = IEEE80211_MODE_11NG;
1207 *mode = IEEE80211_MODE_AUTO;
1213 * Turbo mode is an ``option''.
1214 * XXX does not apply to AUTO
1216 if (ime->ifm_media & IFM_IEEE80211_TURBO) {
1217 if (*mode == IEEE80211_MODE_11A) {
1218 if (flags & IEEE80211_F_TURBOP)
1219 *mode = IEEE80211_MODE_TURBO_A;
1221 *mode = IEEE80211_MODE_STURBO_A;
1222 } else if (*mode == IEEE80211_MODE_11G)
1223 *mode = IEEE80211_MODE_TURBO_G;
1232 * Handle a media change request on the underlying interface.
1235 ieee80211com_media_change(struct ifnet *ifp)
1241 * Handle a media change request on the vap interface.
1244 ieee80211_media_change(struct ifnet *ifp)
1246 struct ieee80211vap *vap = ifp->if_softc;
1247 struct ifmedia_entry *ime = vap->iv_media.ifm_cur;
1250 if (!media2mode(ime, vap->iv_flags, &newmode))
1252 if (vap->iv_des_mode != newmode) {
1253 vap->iv_des_mode = newmode;
1254 /* XXX kick state machine if up+running */
1260 * Common code to calculate the media status word
1261 * from the operating mode and channel state.
1264 media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan)
1268 status = IFM_IEEE80211;
1270 case IEEE80211_M_STA:
1272 case IEEE80211_M_IBSS:
1273 status |= IFM_IEEE80211_ADHOC;
1275 case IEEE80211_M_HOSTAP:
1276 status |= IFM_IEEE80211_HOSTAP;
1278 case IEEE80211_M_MONITOR:
1279 status |= IFM_IEEE80211_MONITOR;
1281 case IEEE80211_M_AHDEMO:
1282 status |= IFM_IEEE80211_ADHOC | IFM_FLAG0;
1284 case IEEE80211_M_WDS:
1285 status |= IFM_IEEE80211_WDS;
1287 case IEEE80211_M_MBSS:
1288 status |= IFM_IEEE80211_MBSS;
1291 if (IEEE80211_IS_CHAN_HTA(chan)) {
1292 status |= IFM_IEEE80211_11NA;
1293 } else if (IEEE80211_IS_CHAN_HTG(chan)) {
1294 status |= IFM_IEEE80211_11NG;
1295 } else if (IEEE80211_IS_CHAN_A(chan)) {
1296 status |= IFM_IEEE80211_11A;
1297 } else if (IEEE80211_IS_CHAN_B(chan)) {
1298 status |= IFM_IEEE80211_11B;
1299 } else if (IEEE80211_IS_CHAN_ANYG(chan)) {
1300 status |= IFM_IEEE80211_11G;
1301 } else if (IEEE80211_IS_CHAN_FHSS(chan)) {
1302 status |= IFM_IEEE80211_FH;
1304 /* XXX else complain? */
1306 if (IEEE80211_IS_CHAN_TURBO(chan))
1307 status |= IFM_IEEE80211_TURBO;
1309 if (IEEE80211_IS_CHAN_HT20(chan))
1310 status |= IFM_IEEE80211_HT20;
1311 if (IEEE80211_IS_CHAN_HT40(chan))
1312 status |= IFM_IEEE80211_HT40;
1318 ieee80211com_media_status(struct ifnet *ifp, struct ifmediareq *imr)
1320 struct ieee80211com *ic = ifp->if_l2com;
1321 struct ieee80211vap *vap;
1323 imr->ifm_status = IFM_AVALID;
1324 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
1325 if (vap->iv_ifp->if_flags & IFF_UP) {
1326 imr->ifm_status |= IFM_ACTIVE;
1329 imr->ifm_active = media_status(ic->ic_opmode, ic->ic_curchan);
1330 if (imr->ifm_status & IFM_ACTIVE)
1331 imr->ifm_current = imr->ifm_active;
1335 ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr)
1337 struct ieee80211vap *vap = ifp->if_softc;
1338 struct ieee80211com *ic = vap->iv_ic;
1339 enum ieee80211_phymode mode;
1341 imr->ifm_status = IFM_AVALID;
1343 * NB: use the current channel's mode to lock down a xmit
1344 * rate only when running; otherwise we may have a mismatch
1345 * in which case the rate will not be convertible.
1347 if (vap->iv_state == IEEE80211_S_RUN) {
1348 imr->ifm_status |= IFM_ACTIVE;
1349 mode = ieee80211_chan2mode(ic->ic_curchan);
1351 mode = IEEE80211_MODE_AUTO;
1352 imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan);
1354 * Calculate a current rate if possible.
1356 if (vap->iv_txparms[mode].ucastrate != IEEE80211_FIXED_RATE_NONE) {
1358 * A fixed rate is set, report that.
1360 imr->ifm_active |= ieee80211_rate2media(ic,
1361 vap->iv_txparms[mode].ucastrate, mode);
1362 } else if (vap->iv_opmode == IEEE80211_M_STA) {
1364 * In station mode report the current transmit rate.
1366 imr->ifm_active |= ieee80211_rate2media(ic,
1367 vap->iv_bss->ni_txrate, mode);
1369 imr->ifm_active |= IFM_AUTO;
1370 if (imr->ifm_status & IFM_ACTIVE)
1371 imr->ifm_current = imr->ifm_active;
1375 * Set the current phy mode and recalculate the active channel
1376 * set based on the available channels for this mode. Also
1377 * select a new default/current channel if the current one is
1378 * inappropriate for this mode.
1381 ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode)
1384 * Adjust basic rates in 11b/11g supported rate set.
1385 * Note that if operating on a hal/quarter rate channel
1386 * this is a noop as those rates sets are different
1389 if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B)
1390 ieee80211_setbasicrates(&ic->ic_sup_rates[mode], mode);
1392 ic->ic_curmode = mode;
1393 ieee80211_reset_erp(ic); /* reset ERP state */
1399 * Return the phy mode for with the specified channel.
1401 enum ieee80211_phymode
1402 ieee80211_chan2mode(const struct ieee80211_channel *chan)
1405 if (IEEE80211_IS_CHAN_HTA(chan))
1406 return IEEE80211_MODE_11NA;
1407 else if (IEEE80211_IS_CHAN_HTG(chan))
1408 return IEEE80211_MODE_11NG;
1409 else if (IEEE80211_IS_CHAN_108G(chan))
1410 return IEEE80211_MODE_TURBO_G;
1411 else if (IEEE80211_IS_CHAN_ST(chan))
1412 return IEEE80211_MODE_STURBO_A;
1413 else if (IEEE80211_IS_CHAN_TURBO(chan))
1414 return IEEE80211_MODE_TURBO_A;
1415 else if (IEEE80211_IS_CHAN_HALF(chan))
1416 return IEEE80211_MODE_HALF;
1417 else if (IEEE80211_IS_CHAN_QUARTER(chan))
1418 return IEEE80211_MODE_QUARTER;
1419 else if (IEEE80211_IS_CHAN_A(chan))
1420 return IEEE80211_MODE_11A;
1421 else if (IEEE80211_IS_CHAN_ANYG(chan))
1422 return IEEE80211_MODE_11G;
1423 else if (IEEE80211_IS_CHAN_B(chan))
1424 return IEEE80211_MODE_11B;
1425 else if (IEEE80211_IS_CHAN_FHSS(chan))
1426 return IEEE80211_MODE_FH;
1428 /* NB: should not get here */
1429 printf("%s: cannot map channel to mode; freq %u flags 0x%x\n",
1430 __func__, chan->ic_freq, chan->ic_flags);
1431 return IEEE80211_MODE_11B;
1435 u_int match; /* rate + mode */
1436 u_int media; /* if_media rate */
1440 findmedia(const struct ratemedia rates[], int n, u_int match)
1444 for (i = 0; i < n; i++)
1445 if (rates[i].match == match)
1446 return rates[i].media;
1451 * Convert IEEE80211 rate value to ifmedia subtype.
1452 * Rate is either a legacy rate in units of 0.5Mbps
1456 ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode)
1458 #define N(a) (sizeof(a) / sizeof(a[0]))
1459 static const struct ratemedia rates[] = {
1460 { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 },
1461 { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 },
1462 { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 },
1463 { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 },
1464 { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 },
1465 { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 },
1466 { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 },
1467 { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 },
1468 { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 },
1469 { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 },
1470 { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 },
1471 { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 },
1472 { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 },
1473 { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 },
1474 { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 },
1475 { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 },
1476 { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 },
1477 { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 },
1478 { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 },
1479 { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 },
1480 { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 },
1481 { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 },
1482 { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 },
1483 { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 },
1484 { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 },
1485 { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 },
1486 { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 },
1487 { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 },
1488 { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 },
1489 { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 },
1490 /* NB: OFDM72 doesn't realy exist so we don't handle it */
1492 static const struct ratemedia htrates[] = {
1493 { 0, IFM_IEEE80211_MCS },
1494 { 1, IFM_IEEE80211_MCS },
1495 { 2, IFM_IEEE80211_MCS },
1496 { 3, IFM_IEEE80211_MCS },
1497 { 4, IFM_IEEE80211_MCS },
1498 { 5, IFM_IEEE80211_MCS },
1499 { 6, IFM_IEEE80211_MCS },
1500 { 7, IFM_IEEE80211_MCS },
1501 { 8, IFM_IEEE80211_MCS },
1502 { 9, IFM_IEEE80211_MCS },
1503 { 10, IFM_IEEE80211_MCS },
1504 { 11, IFM_IEEE80211_MCS },
1505 { 12, IFM_IEEE80211_MCS },
1506 { 13, IFM_IEEE80211_MCS },
1507 { 14, IFM_IEEE80211_MCS },
1508 { 15, IFM_IEEE80211_MCS },
1513 * Check 11n rates first for match as an MCS.
1515 if (mode == IEEE80211_MODE_11NA) {
1516 if (rate & IEEE80211_RATE_MCS) {
1517 rate &= ~IEEE80211_RATE_MCS;
1518 m = findmedia(htrates, N(htrates), rate);
1520 return m | IFM_IEEE80211_11NA;
1522 } else if (mode == IEEE80211_MODE_11NG) {
1523 /* NB: 12 is ambiguous, it will be treated as an MCS */
1524 if (rate & IEEE80211_RATE_MCS) {
1525 rate &= ~IEEE80211_RATE_MCS;
1526 m = findmedia(htrates, N(htrates), rate);
1528 return m | IFM_IEEE80211_11NG;
1531 rate &= IEEE80211_RATE_VAL;
1533 case IEEE80211_MODE_11A:
1534 case IEEE80211_MODE_HALF: /* XXX good 'nuf */
1535 case IEEE80211_MODE_QUARTER:
1536 case IEEE80211_MODE_11NA:
1537 case IEEE80211_MODE_TURBO_A:
1538 case IEEE80211_MODE_STURBO_A:
1539 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11A);
1540 case IEEE80211_MODE_11B:
1541 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11B);
1542 case IEEE80211_MODE_FH:
1543 return findmedia(rates, N(rates), rate | IFM_IEEE80211_FH);
1544 case IEEE80211_MODE_AUTO:
1545 /* NB: ic may be NULL for some drivers */
1546 if (ic != NULL && ic->ic_phytype == IEEE80211_T_FH)
1547 return findmedia(rates, N(rates),
1548 rate | IFM_IEEE80211_FH);
1549 /* NB: hack, 11g matches both 11b+11a rates */
1551 case IEEE80211_MODE_11G:
1552 case IEEE80211_MODE_11NG:
1553 case IEEE80211_MODE_TURBO_G:
1554 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11G);
1561 ieee80211_media2rate(int mword)
1563 #define N(a) (sizeof(a) / sizeof(a[0]))
1564 static const int ieeerates[] = {
1568 2, /* IFM_IEEE80211_FH1 */
1569 4, /* IFM_IEEE80211_FH2 */
1570 2, /* IFM_IEEE80211_DS1 */
1571 4, /* IFM_IEEE80211_DS2 */
1572 11, /* IFM_IEEE80211_DS5 */
1573 22, /* IFM_IEEE80211_DS11 */
1574 44, /* IFM_IEEE80211_DS22 */
1575 12, /* IFM_IEEE80211_OFDM6 */
1576 18, /* IFM_IEEE80211_OFDM9 */
1577 24, /* IFM_IEEE80211_OFDM12 */
1578 36, /* IFM_IEEE80211_OFDM18 */
1579 48, /* IFM_IEEE80211_OFDM24 */
1580 72, /* IFM_IEEE80211_OFDM36 */
1581 96, /* IFM_IEEE80211_OFDM48 */
1582 108, /* IFM_IEEE80211_OFDM54 */
1583 144, /* IFM_IEEE80211_OFDM72 */
1584 0, /* IFM_IEEE80211_DS354k */
1585 0, /* IFM_IEEE80211_DS512k */
1586 6, /* IFM_IEEE80211_OFDM3 */
1587 9, /* IFM_IEEE80211_OFDM4 */
1588 54, /* IFM_IEEE80211_OFDM27 */
1589 -1, /* IFM_IEEE80211_MCS */
1591 return IFM_SUBTYPE(mword) < N(ieeerates) ?
1592 ieeerates[IFM_SUBTYPE(mword)] : 0;
1597 * The following hash function is adapted from "Hash Functions" by Bob Jenkins
1598 * ("Algorithm Alley", Dr. Dobbs Journal, September 1997).
1600 #define mix(a, b, c) \
1602 a -= b; a -= c; a ^= (c >> 13); \
1603 b -= c; b -= a; b ^= (a << 8); \
1604 c -= a; c -= b; c ^= (b >> 13); \
1605 a -= b; a -= c; a ^= (c >> 12); \
1606 b -= c; b -= a; b ^= (a << 16); \
1607 c -= a; c -= b; c ^= (b >> 5); \
1608 a -= b; a -= c; a ^= (c >> 3); \
1609 b -= c; b -= a; b ^= (a << 10); \
1610 c -= a; c -= b; c ^= (b >> 15); \
1611 } while (/*CONSTCOND*/0)
1614 ieee80211_mac_hash(const struct ieee80211com *ic,
1615 const uint8_t addr[IEEE80211_ADDR_LEN])
1617 uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = ic->ic_hash_key;