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,
79 static const uint8_t ieee80211broadcastaddr[IEEE80211_ADDR_LEN] =
80 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
82 static void ieee80211_syncflag_locked(struct ieee80211com *ic, int flag);
83 static void ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag);
84 static int ieee80211_media_setup(struct ieee80211com *ic,
85 struct ifmedia *media, int caps, int addsta,
86 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat);
87 static void ieee80211com_media_status(struct ifnet *, struct ifmediareq *);
88 static int ieee80211com_media_change(struct ifnet *);
89 static int media_status(enum ieee80211_opmode,
90 const struct ieee80211_channel *);
92 MALLOC_DEFINE(M_80211_VAP, "80211vap", "802.11 vap state");
95 * Default supported rates for 802.11 operation (in IEEE .5Mb units).
97 #define B(r) ((r) | IEEE80211_RATE_BASIC)
98 static const struct ieee80211_rateset ieee80211_rateset_11a =
99 { 8, { B(12), 18, B(24), 36, B(48), 72, 96, 108 } };
100 static const struct ieee80211_rateset ieee80211_rateset_half =
101 { 8, { B(6), 9, B(12), 18, B(24), 36, 48, 54 } };
102 static const struct ieee80211_rateset ieee80211_rateset_quarter =
103 { 8, { B(3), 4, B(6), 9, B(12), 18, 24, 27 } };
104 static const struct ieee80211_rateset ieee80211_rateset_11b =
105 { 4, { B(2), B(4), B(11), B(22) } };
106 /* NB: OFDM rates are handled specially based on mode */
107 static const struct ieee80211_rateset ieee80211_rateset_11g =
108 { 12, { B(2), B(4), B(11), B(22), 12, 18, 24, 36, 48, 72, 96, 108 } };
112 * Fill in 802.11 available channel set, mark
113 * all available channels as active, and pick
114 * a default channel if not already specified.
117 ieee80211_chan_init(struct ieee80211com *ic)
119 #define DEFAULTRATES(m, def) do { \
120 if (ic->ic_sup_rates[m].rs_nrates == 0) \
121 ic->ic_sup_rates[m] = def; \
123 struct ieee80211_channel *c;
126 KASSERT(0 < ic->ic_nchans && ic->ic_nchans <= IEEE80211_CHAN_MAX,
127 ("invalid number of channels specified: %u", ic->ic_nchans));
128 memset(ic->ic_chan_avail, 0, sizeof(ic->ic_chan_avail));
129 memset(ic->ic_modecaps, 0, sizeof(ic->ic_modecaps));
130 setbit(ic->ic_modecaps, IEEE80211_MODE_AUTO);
131 for (i = 0; i < ic->ic_nchans; i++) {
132 c = &ic->ic_channels[i];
133 KASSERT(c->ic_flags != 0, ("channel with no flags"));
135 * Help drivers that work only with frequencies by filling
136 * in IEEE channel #'s if not already calculated. Note this
137 * mimics similar work done in ieee80211_setregdomain when
138 * changing regulatory state.
141 c->ic_ieee = ieee80211_mhz2ieee(c->ic_freq,c->ic_flags);
142 if (IEEE80211_IS_CHAN_HT40(c) && c->ic_extieee == 0)
143 c->ic_extieee = ieee80211_mhz2ieee(c->ic_freq +
144 (IEEE80211_IS_CHAN_HT40U(c) ? 20 : -20),
146 /* default max tx power to max regulatory */
147 if (c->ic_maxpower == 0)
148 c->ic_maxpower = 2*c->ic_maxregpower;
149 setbit(ic->ic_chan_avail, c->ic_ieee);
151 * Identify mode capabilities.
153 if (IEEE80211_IS_CHAN_A(c))
154 setbit(ic->ic_modecaps, IEEE80211_MODE_11A);
155 if (IEEE80211_IS_CHAN_B(c))
156 setbit(ic->ic_modecaps, IEEE80211_MODE_11B);
157 if (IEEE80211_IS_CHAN_ANYG(c))
158 setbit(ic->ic_modecaps, IEEE80211_MODE_11G);
159 if (IEEE80211_IS_CHAN_FHSS(c))
160 setbit(ic->ic_modecaps, IEEE80211_MODE_FH);
161 if (IEEE80211_IS_CHAN_108A(c))
162 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_A);
163 if (IEEE80211_IS_CHAN_108G(c))
164 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_G);
165 if (IEEE80211_IS_CHAN_ST(c))
166 setbit(ic->ic_modecaps, IEEE80211_MODE_STURBO_A);
167 if (IEEE80211_IS_CHAN_HALF(c))
168 setbit(ic->ic_modecaps, IEEE80211_MODE_HALF);
169 if (IEEE80211_IS_CHAN_QUARTER(c))
170 setbit(ic->ic_modecaps, IEEE80211_MODE_QUARTER);
171 if (IEEE80211_IS_CHAN_HTA(c))
172 setbit(ic->ic_modecaps, IEEE80211_MODE_11NA);
173 if (IEEE80211_IS_CHAN_HTG(c))
174 setbit(ic->ic_modecaps, IEEE80211_MODE_11NG);
176 /* initialize candidate channels to all available */
177 memcpy(ic->ic_chan_active, ic->ic_chan_avail,
178 sizeof(ic->ic_chan_avail));
180 /* sort channel table to allow lookup optimizations */
181 ieee80211_sort_channels(ic->ic_channels, ic->ic_nchans);
183 /* invalidate any previous state */
184 ic->ic_bsschan = IEEE80211_CHAN_ANYC;
185 ic->ic_prevchan = NULL;
186 ic->ic_csa_newchan = NULL;
187 /* arbitrarily pick the first channel */
188 ic->ic_curchan = &ic->ic_channels[0];
189 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
191 /* fillin well-known rate sets if driver has not specified */
192 DEFAULTRATES(IEEE80211_MODE_11B, ieee80211_rateset_11b);
193 DEFAULTRATES(IEEE80211_MODE_11G, ieee80211_rateset_11g);
194 DEFAULTRATES(IEEE80211_MODE_11A, ieee80211_rateset_11a);
195 DEFAULTRATES(IEEE80211_MODE_TURBO_A, ieee80211_rateset_11a);
196 DEFAULTRATES(IEEE80211_MODE_TURBO_G, ieee80211_rateset_11g);
197 DEFAULTRATES(IEEE80211_MODE_STURBO_A, ieee80211_rateset_11a);
198 DEFAULTRATES(IEEE80211_MODE_HALF, ieee80211_rateset_half);
199 DEFAULTRATES(IEEE80211_MODE_QUARTER, ieee80211_rateset_quarter);
200 DEFAULTRATES(IEEE80211_MODE_11NA, ieee80211_rateset_11a);
201 DEFAULTRATES(IEEE80211_MODE_11NG, ieee80211_rateset_11g);
204 * Set auto mode to reset active channel state and any desired channel.
206 (void) ieee80211_setmode(ic, IEEE80211_MODE_AUTO);
211 null_update_mcast(struct ifnet *ifp)
213 if_printf(ifp, "need multicast update callback\n");
217 null_update_promisc(struct ifnet *ifp)
219 if_printf(ifp, "need promiscuous mode update callback\n");
223 null_output(struct ifnet *ifp, struct mbuf *m,
224 struct sockaddr *dst, struct route *ro)
226 if_printf(ifp, "discard raw packet\n");
232 null_input(struct ifnet *ifp, struct mbuf *m)
234 if_printf(ifp, "if_input should not be called\n");
239 * Attach/setup the common net80211 state. Called by
240 * the driver on attach to prior to creating any vap's.
243 ieee80211_ifattach(struct ieee80211com *ic,
244 const uint8_t macaddr[IEEE80211_ADDR_LEN])
246 struct ifnet *ifp = ic->ic_ifp;
247 struct sockaddr_dl *sdl;
250 KASSERT(ifp->if_type == IFT_IEEE80211, ("if_type %d", ifp->if_type));
252 IEEE80211_LOCK_INIT(ic, ifp->if_xname);
253 TAILQ_INIT(&ic->ic_vaps);
255 /* Create a taskqueue for all state changes */
256 ic->ic_tq = taskqueue_create("ic_taskq", M_WAITOK | M_ZERO,
257 taskqueue_thread_enqueue, &ic->ic_tq);
258 taskqueue_start_threads(&ic->ic_tq, 1, PI_NET, "%s taskq",
261 * Fill in 802.11 available channel set, mark all
262 * available channels as active, and pick a default
263 * channel if not already specified.
265 ieee80211_media_init(ic);
267 ic->ic_update_mcast = null_update_mcast;
268 ic->ic_update_promisc = null_update_promisc;
270 ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT;
271 ic->ic_lintval = ic->ic_bintval;
272 ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX;
274 ieee80211_crypto_attach(ic);
275 ieee80211_node_attach(ic);
276 ieee80211_power_attach(ic);
277 ieee80211_proto_attach(ic);
278 #ifdef IEEE80211_SUPPORT_SUPERG
279 ieee80211_superg_attach(ic);
281 ieee80211_ht_attach(ic);
282 ieee80211_scan_attach(ic);
283 ieee80211_regdomain_attach(ic);
285 ieee80211_sysctl_attach(ic);
287 ifp->if_addrlen = IEEE80211_ADDR_LEN;
290 ifp->if_mtu = IEEE80211_MTU_MAX;
291 ifp->if_broadcastaddr = ieee80211broadcastaddr;
292 ifp->if_output = null_output;
293 ifp->if_input = null_input; /* just in case */
294 ifp->if_resolvemulti = NULL; /* NB: callers check */
296 ifa = ifaddr_byindex(ifp->if_index);
297 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__));
298 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
299 sdl->sdl_type = IFT_ETHER; /* XXX IFT_IEEE80211? */
300 sdl->sdl_alen = IEEE80211_ADDR_LEN;
301 IEEE80211_ADDR_COPY(LLADDR(sdl), macaddr);
305 * Detach net80211 state on device detach. Tear down
306 * all vap's and reclaim all common state prior to the
307 * device state going away. Note we may call back into
308 * driver; it must be prepared for this.
311 ieee80211_ifdetach(struct ieee80211com *ic)
313 struct ifnet *ifp = ic->ic_ifp;
314 struct ieee80211vap *vap;
316 while ((vap = TAILQ_FIRST(&ic->ic_vaps)) != NULL)
317 ieee80211_vap_destroy(vap);
318 ieee80211_waitfor_parent(ic);
320 ieee80211_sysctl_detach(ic);
321 ieee80211_regdomain_detach(ic);
322 ieee80211_scan_detach(ic);
323 #ifdef IEEE80211_SUPPORT_SUPERG
324 ieee80211_superg_detach(ic);
326 ieee80211_ht_detach(ic);
327 /* NB: must be called before ieee80211_node_detach */
328 ieee80211_proto_detach(ic);
329 ieee80211_crypto_detach(ic);
330 ieee80211_power_detach(ic);
331 ieee80211_node_detach(ic);
332 ifmedia_removeall(&ic->ic_media);
334 taskqueue_free(ic->ic_tq);
335 IEEE80211_LOCK_DESTROY(ic);
340 * Default reset method for use with the ioctl support. This
341 * method is invoked after any state change in the 802.11
342 * layer that should be propagated to the hardware but not
343 * require re-initialization of the 802.11 state machine (e.g
344 * rescanning for an ap). We always return ENETRESET which
345 * should cause the driver to re-initialize the device. Drivers
346 * can override this method to implement more optimized support.
349 default_reset(struct ieee80211vap *vap, u_long cmd)
355 * Prepare a vap for use. Drivers use this call to
356 * setup net80211 state in new vap's prior attaching
357 * them with ieee80211_vap_attach (below).
360 ieee80211_vap_setup(struct ieee80211com *ic, struct ieee80211vap *vap,
361 const char name[IFNAMSIZ], int unit, int opmode, int flags,
362 const uint8_t bssid[IEEE80211_ADDR_LEN],
363 const uint8_t macaddr[IEEE80211_ADDR_LEN])
367 ifp = if_alloc(IFT_ETHER);
369 if_printf(ic->ic_ifp, "%s: unable to allocate ifnet\n",
373 if_initname(ifp, name, unit);
374 ifp->if_softc = vap; /* back pointer */
375 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST;
376 ifp->if_start = ieee80211_start;
377 ifp->if_ioctl = ieee80211_ioctl;
378 ifp->if_watchdog = NULL; /* NB: no watchdog routine */
379 ifp->if_init = ieee80211_init;
380 /* NB: input+output filled in by ether_ifattach */
381 IFQ_SET_MAXLEN(&ifp->if_snd, IFQ_MAXLEN);
382 ifp->if_snd.ifq_drv_maxlen = IFQ_MAXLEN;
383 IFQ_SET_READY(&ifp->if_snd);
387 vap->iv_flags = ic->ic_flags; /* propagate common flags */
388 vap->iv_flags_ext = ic->ic_flags_ext;
389 vap->iv_flags_ven = ic->ic_flags_ven;
390 vap->iv_caps = ic->ic_caps &~ IEEE80211_C_OPMODE;
391 vap->iv_htcaps = ic->ic_htcaps;
392 vap->iv_opmode = opmode;
393 vap->iv_caps |= ieee80211_opcap[opmode];
395 case IEEE80211_M_WDS:
397 * WDS links must specify the bssid of the far end.
398 * For legacy operation this is a static relationship.
399 * For non-legacy operation the station must associate
400 * and be authorized to pass traffic. Plumbing the
401 * vap to the proper node happens when the vap
402 * transitions to RUN state.
404 IEEE80211_ADDR_COPY(vap->iv_des_bssid, bssid);
405 vap->iv_flags |= IEEE80211_F_DESBSSID;
406 if (flags & IEEE80211_CLONE_WDSLEGACY)
407 vap->iv_flags_ext |= IEEE80211_FEXT_WDSLEGACY;
409 #ifdef IEEE80211_SUPPORT_TDMA
410 case IEEE80211_M_AHDEMO:
411 if (flags & IEEE80211_CLONE_TDMA) {
412 /* NB: checked before clone operation allowed */
413 KASSERT(ic->ic_caps & IEEE80211_C_TDMA,
414 ("not TDMA capable, ic_caps 0x%x", ic->ic_caps));
416 * Propagate TDMA capability to mark vap; this
417 * cannot be removed and is used to distinguish
418 * regular ahdemo operation from ahdemo+tdma.
420 vap->iv_caps |= IEEE80211_C_TDMA;
425 /* auto-enable s/w beacon miss support */
426 if (flags & IEEE80211_CLONE_NOBEACONS)
427 vap->iv_flags_ext |= IEEE80211_FEXT_SWBMISS;
429 * Enable various functionality by default if we're
430 * capable; the driver can override us if it knows better.
432 if (vap->iv_caps & IEEE80211_C_WME)
433 vap->iv_flags |= IEEE80211_F_WME;
434 if (vap->iv_caps & IEEE80211_C_BURST)
435 vap->iv_flags |= IEEE80211_F_BURST;
436 /* NB: bg scanning only makes sense for station mode right now */
437 if (vap->iv_opmode == IEEE80211_M_STA &&
438 (vap->iv_caps & IEEE80211_C_BGSCAN))
439 vap->iv_flags |= IEEE80211_F_BGSCAN;
440 vap->iv_flags |= IEEE80211_F_DOTH; /* XXX no cap, just ena */
441 /* NB: DFS support only makes sense for ap mode right now */
442 if (vap->iv_opmode == IEEE80211_M_HOSTAP &&
443 (vap->iv_caps & IEEE80211_C_DFS))
444 vap->iv_flags_ext |= IEEE80211_FEXT_DFS;
446 vap->iv_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */
447 vap->iv_bmissthreshold = IEEE80211_HWBMISS_DEFAULT;
448 vap->iv_dtim_period = IEEE80211_DTIM_DEFAULT;
450 * Install a default reset method for the ioctl support;
451 * the driver can override this.
453 vap->iv_reset = default_reset;
455 IEEE80211_ADDR_COPY(vap->iv_myaddr, macaddr);
457 ieee80211_sysctl_vattach(vap);
458 ieee80211_crypto_vattach(vap);
459 ieee80211_node_vattach(vap);
460 ieee80211_power_vattach(vap);
461 ieee80211_proto_vattach(vap);
462 #ifdef IEEE80211_SUPPORT_SUPERG
463 ieee80211_superg_vattach(vap);
465 ieee80211_ht_vattach(vap);
466 ieee80211_scan_vattach(vap);
467 ieee80211_regdomain_vattach(vap);
468 ieee80211_radiotap_vattach(vap);
474 * Activate a vap. State should have been prepared with a
475 * call to ieee80211_vap_setup and by the driver. On return
476 * from this call the vap is ready for use.
479 ieee80211_vap_attach(struct ieee80211vap *vap,
480 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat)
482 struct ifnet *ifp = vap->iv_ifp;
483 struct ieee80211com *ic = vap->iv_ic;
484 struct ifmediareq imr;
487 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
488 "%s: %s parent %s flags 0x%x flags_ext 0x%x\n",
489 __func__, ieee80211_opmode_name[vap->iv_opmode],
490 ic->ic_ifp->if_xname, vap->iv_flags, vap->iv_flags_ext);
493 * Do late attach work that cannot happen until after
494 * the driver has had a chance to override defaults.
496 ieee80211_node_latevattach(vap);
497 ieee80211_power_latevattach(vap);
499 maxrate = ieee80211_media_setup(ic, &vap->iv_media, vap->iv_caps,
500 vap->iv_opmode == IEEE80211_M_STA, media_change, media_stat);
501 ieee80211_media_status(ifp, &imr);
502 /* NB: strip explicit mode; we're actually in autoselect */
503 ifmedia_set(&vap->iv_media,
504 imr.ifm_active &~ (IFM_MMASK | IFM_IEEE80211_TURBO));
506 ifp->if_baudrate = IF_Mbps(maxrate);
508 ether_ifattach(ifp, vap->iv_myaddr);
509 /* hook output method setup by ether_ifattach */
510 vap->iv_output = ifp->if_output;
511 ifp->if_output = ieee80211_output;
512 /* NB: if_mtu set by ether_ifattach to ETHERMTU */
515 TAILQ_INSERT_TAIL(&ic->ic_vaps, vap, iv_next);
516 if (vap->iv_opmode == IEEE80211_M_MONITOR)
518 ieee80211_syncflag_locked(ic, IEEE80211_F_WME);
519 #ifdef IEEE80211_SUPPORT_SUPERG
520 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP);
522 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF);
523 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST);
524 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_HT);
525 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_USEHT40);
526 ieee80211_syncifflag_locked(ic, IFF_PROMISC);
527 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI);
528 IEEE80211_UNLOCK(ic);
534 * Tear down vap state and reclaim the ifnet.
535 * The driver is assumed to have prepared for
536 * this; e.g. by turning off interrupts for the
540 ieee80211_vap_detach(struct ieee80211vap *vap)
542 struct ieee80211com *ic = vap->iv_ic;
543 struct ifnet *ifp = vap->iv_ifp;
545 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s parent %s\n",
546 __func__, ieee80211_opmode_name[vap->iv_opmode],
547 ic->ic_ifp->if_xname);
550 /* block traffic from above */
551 ifp->if_drv_flags |= IFF_DRV_OACTIVE;
553 * Evil hack. Clear the backpointer from the ifnet to the
554 * vap so any requests from above will return an error or
555 * be ignored. In particular this short-circuits requests
556 * by the bridge to turn off promiscuous mode as a result
557 * of calling ether_ifdetach.
559 ifp->if_softc = NULL;
561 * Stop the vap before detaching the ifnet. Ideally we'd
562 * do this in the other order so the ifnet is inaccessible
563 * while we cleanup internal state but that is hard.
565 ieee80211_stop_locked(vap);
566 IEEE80211_UNLOCK(ic);
569 * Flush any deferred vap tasks.
570 * NB: must be before ether_ifdetach() and removal from ic_vaps list
572 ieee80211_draintask(ic, &vap->iv_nstate_task);
573 ieee80211_draintask(ic, &vap->iv_swbmiss_task);
576 KASSERT(vap->iv_state == IEEE80211_S_INIT , ("vap still running"));
577 TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next);
578 if (vap->iv_opmode == IEEE80211_M_MONITOR)
580 ieee80211_syncflag_locked(ic, IEEE80211_F_WME);
581 #ifdef IEEE80211_SUPPORT_SUPERG
582 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP);
584 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF);
585 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST);
586 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_HT);
587 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_USEHT40);
588 /* NB: this handles the bpfdetach done below */
589 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_BPF);
590 ieee80211_syncifflag_locked(ic, IFF_PROMISC);
591 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI);
592 IEEE80211_UNLOCK(ic);
594 /* XXX can't hold com lock */
595 /* NB: bpfdetach is called by ether_ifdetach and claims all taps */
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_HOSTAP)
645 oflags = ifp->if_flags;
647 ifp->if_flags |= flag;
649 ifp->if_flags &= ~flag;
650 if ((ifp->if_flags ^ oflags) & flag) {
651 /* XXX should we return 1/0 and let caller do this? */
652 if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
653 if (flag == IFF_PROMISC)
654 ieee80211_runtask(ic, &ic->ic_promisc_task);
655 else if (flag == IFF_ALLMULTI)
656 ieee80211_runtask(ic, &ic->ic_mcast_task);
662 * Synchronize flag bit state in the com structure
663 * according to the state of all vap's. This is used,
664 * for example, to handle state changes via ioctls.
667 ieee80211_syncflag_locked(struct ieee80211com *ic, int flag)
669 struct ieee80211vap *vap;
672 IEEE80211_LOCK_ASSERT(ic);
675 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
676 if (vap->iv_flags & flag) {
681 ic->ic_flags |= flag;
683 ic->ic_flags &= ~flag;
687 ieee80211_syncflag(struct ieee80211vap *vap, int flag)
689 struct ieee80211com *ic = vap->iv_ic;
694 vap->iv_flags &= ~flag;
696 vap->iv_flags |= flag;
697 ieee80211_syncflag_locked(ic, flag);
698 IEEE80211_UNLOCK(ic);
702 * Synchronize flag bit state in the com structure
703 * according to the state of all vap's. This is used,
704 * for example, to handle state changes via ioctls.
707 ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag)
709 struct ieee80211vap *vap;
712 IEEE80211_LOCK_ASSERT(ic);
715 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
716 if (vap->iv_flags_ext & flag) {
721 ic->ic_flags_ext |= flag;
723 ic->ic_flags_ext &= ~flag;
727 ieee80211_syncflag_ext(struct ieee80211vap *vap, int flag)
729 struct ieee80211com *ic = vap->iv_ic;
734 vap->iv_flags_ext &= ~flag;
736 vap->iv_flags_ext |= flag;
737 ieee80211_syncflag_ext_locked(ic, flag);
738 IEEE80211_UNLOCK(ic);
742 mapgsm(u_int freq, u_int flags)
745 if (flags & IEEE80211_CHAN_QUARTER)
747 else if (flags & IEEE80211_CHAN_HALF)
751 /* NB: there is no 907/20 wide but leave room */
752 return (freq - 906*10) / 5;
756 mappsb(u_int freq, u_int flags)
758 return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5;
762 * Convert MHz frequency to IEEE channel number.
765 ieee80211_mhz2ieee(u_int freq, u_int flags)
767 #define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990)
768 if (flags & IEEE80211_CHAN_GSM)
769 return mapgsm(freq, flags);
770 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
774 return ((int) freq - 2407) / 5;
776 return 15 + ((freq - 2512) / 20);
777 } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */
779 /* XXX check regdomain? */
780 if (IS_FREQ_IN_PSB(freq))
781 return mappsb(freq, flags);
782 return (freq - 4000) / 5;
784 return (freq - 5000) / 5;
785 } else { /* either, guess */
789 if (907 <= freq && freq <= 922)
790 return mapgsm(freq, flags);
791 return ((int) freq - 2407) / 5;
794 if (IS_FREQ_IN_PSB(freq))
795 return mappsb(freq, flags);
796 else if (freq > 4900)
797 return (freq - 4000) / 5;
799 return 15 + ((freq - 2512) / 20);
801 return (freq - 5000) / 5;
803 #undef IS_FREQ_IN_PSB
807 * Convert channel to IEEE channel number.
810 ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c)
813 if_printf(ic->ic_ifp, "invalid channel (NULL)\n");
816 return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee);
820 * Convert IEEE channel number to MHz frequency.
823 ieee80211_ieee2mhz(u_int chan, u_int flags)
825 if (flags & IEEE80211_CHAN_GSM)
826 return 907 + 5 * (chan / 10);
827 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
831 return 2407 + chan*5;
833 return 2512 + ((chan-15)*20);
834 } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */
835 if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) {
837 return 4940 + chan*5 + (chan % 5 ? 2 : 0);
839 return 5000 + (chan*5);
840 } else { /* either, guess */
841 /* XXX can't distinguish PSB+GSM channels */
844 if (chan < 14) /* 0-13 */
845 return 2407 + chan*5;
846 if (chan < 27) /* 15-26 */
847 return 2512 + ((chan-15)*20);
848 return 5000 + (chan*5);
853 * Locate a channel given a frequency+flags. We cache
854 * the previous lookup to optimize switching between two
855 * channels--as happens with dynamic turbo.
857 struct ieee80211_channel *
858 ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags)
860 struct ieee80211_channel *c;
863 flags &= IEEE80211_CHAN_ALLTURBO;
865 if (c != NULL && c->ic_freq == freq &&
866 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
868 /* brute force search */
869 for (i = 0; i < ic->ic_nchans; i++) {
870 c = &ic->ic_channels[i];
871 if (c->ic_freq == freq &&
872 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
879 * Locate a channel given a channel number+flags. We cache
880 * the previous lookup to optimize switching between two
881 * channels--as happens with dynamic turbo.
883 struct ieee80211_channel *
884 ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags)
886 struct ieee80211_channel *c;
889 flags &= IEEE80211_CHAN_ALLTURBO;
891 if (c != NULL && c->ic_ieee == ieee &&
892 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
894 /* brute force search */
895 for (i = 0; i < ic->ic_nchans; i++) {
896 c = &ic->ic_channels[i];
897 if (c->ic_ieee == ieee &&
898 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
905 addmedia(struct ifmedia *media, int caps, int addsta, int mode, int mword)
907 #define ADD(_ic, _s, _o) \
909 IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL)
910 static const u_int mopts[IEEE80211_MODE_MAX] = {
911 [IEEE80211_MODE_AUTO] = IFM_AUTO,
912 [IEEE80211_MODE_11A] = IFM_IEEE80211_11A,
913 [IEEE80211_MODE_11B] = IFM_IEEE80211_11B,
914 [IEEE80211_MODE_11G] = IFM_IEEE80211_11G,
915 [IEEE80211_MODE_FH] = IFM_IEEE80211_FH,
916 [IEEE80211_MODE_TURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO,
917 [IEEE80211_MODE_TURBO_G] = IFM_IEEE80211_11G|IFM_IEEE80211_TURBO,
918 [IEEE80211_MODE_STURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO,
919 [IEEE80211_MODE_HALF] = IFM_IEEE80211_11A, /* XXX */
920 [IEEE80211_MODE_QUARTER] = IFM_IEEE80211_11A, /* XXX */
921 [IEEE80211_MODE_11NA] = IFM_IEEE80211_11NA,
922 [IEEE80211_MODE_11NG] = IFM_IEEE80211_11NG,
928 ADD(ic, mword, mopt); /* STA mode has no cap */
929 if (caps & IEEE80211_C_IBSS)
930 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC);
931 if (caps & IEEE80211_C_HOSTAP)
932 ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP);
933 if (caps & IEEE80211_C_AHDEMO)
934 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0);
935 if (caps & IEEE80211_C_MONITOR)
936 ADD(media, mword, mopt | IFM_IEEE80211_MONITOR);
937 if (caps & IEEE80211_C_WDS)
938 ADD(media, mword, mopt | IFM_IEEE80211_WDS);
943 * Setup the media data structures according to the channel and
947 ieee80211_media_setup(struct ieee80211com *ic,
948 struct ifmedia *media, int caps, int addsta,
949 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat)
951 int i, j, mode, rate, maxrate, mword, r;
952 const struct ieee80211_rateset *rs;
953 struct ieee80211_rateset allrates;
956 * Fill in media characteristics.
958 ifmedia_init(media, 0, media_change, media_stat);
961 * Add media for legacy operating modes.
963 memset(&allrates, 0, sizeof(allrates));
964 for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) {
965 if (isclr(ic->ic_modecaps, mode))
967 addmedia(media, caps, addsta, mode, IFM_AUTO);
968 if (mode == IEEE80211_MODE_AUTO)
970 rs = &ic->ic_sup_rates[mode];
971 for (i = 0; i < rs->rs_nrates; i++) {
972 rate = rs->rs_rates[i];
973 mword = ieee80211_rate2media(ic, rate, mode);
976 addmedia(media, caps, addsta, mode, mword);
978 * Add legacy rate to the collection of all rates.
980 r = rate & IEEE80211_RATE_VAL;
981 for (j = 0; j < allrates.rs_nrates; j++)
982 if (allrates.rs_rates[j] == r)
984 if (j == allrates.rs_nrates) {
985 /* unique, add to the set */
986 allrates.rs_rates[j] = r;
987 allrates.rs_nrates++;
989 rate = (rate & IEEE80211_RATE_VAL) / 2;
994 for (i = 0; i < allrates.rs_nrates; i++) {
995 mword = ieee80211_rate2media(ic, allrates.rs_rates[i],
996 IEEE80211_MODE_AUTO);
999 /* NB: remove media options from mword */
1000 addmedia(media, caps, addsta,
1001 IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword));
1004 * Add HT/11n media. Note that we do not have enough
1005 * bits in the media subtype to express the MCS so we
1006 * use a "placeholder" media subtype and any fixed MCS
1007 * must be specified with a different mechanism.
1009 for (; mode <= IEEE80211_MODE_11NG; mode++) {
1010 if (isclr(ic->ic_modecaps, mode))
1012 addmedia(media, caps, addsta, mode, IFM_AUTO);
1013 addmedia(media, caps, addsta, mode, IFM_IEEE80211_MCS);
1015 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) ||
1016 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) {
1017 addmedia(media, caps, addsta,
1018 IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS);
1019 /* XXX could walk htrates */
1020 /* XXX known array size */
1021 if (ieee80211_htrates[15].ht40_rate_400ns > maxrate)
1022 maxrate = ieee80211_htrates[15].ht40_rate_400ns;
1028 ieee80211_media_init(struct ieee80211com *ic)
1030 struct ifnet *ifp = ic->ic_ifp;
1033 /* NB: this works because the structure is initialized to zero */
1034 if (!LIST_EMPTY(&ic->ic_media.ifm_list)) {
1036 * We are re-initializing the channel list; clear
1037 * the existing media state as the media routines
1038 * don't suppress duplicates.
1040 ifmedia_removeall(&ic->ic_media);
1042 ieee80211_chan_init(ic);
1045 * Recalculate media settings in case new channel list changes
1046 * the set of available modes.
1048 maxrate = ieee80211_media_setup(ic, &ic->ic_media, ic->ic_caps, 1,
1049 ieee80211com_media_change, ieee80211com_media_status);
1050 /* NB: strip explicit mode; we're actually in autoselect */
1051 ifmedia_set(&ic->ic_media,
1052 media_status(ic->ic_opmode, ic->ic_curchan) &~
1053 (IFM_MMASK | IFM_IEEE80211_TURBO));
1055 ifp->if_baudrate = IF_Mbps(maxrate);
1057 /* XXX need to propagate new media settings to vap's */
1060 /* XXX inline or eliminate? */
1061 const struct ieee80211_rateset *
1062 ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c)
1064 /* XXX does this work for 11ng basic rates? */
1065 return &ic->ic_sup_rates[ieee80211_chan2mode(c)];
1069 ieee80211_announce(struct ieee80211com *ic)
1071 struct ifnet *ifp = ic->ic_ifp;
1072 int i, mode, rate, mword;
1073 const struct ieee80211_rateset *rs;
1075 /* NB: skip AUTO since it has no rates */
1076 for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) {
1077 if (isclr(ic->ic_modecaps, mode))
1079 if_printf(ifp, "%s rates: ", ieee80211_phymode_name[mode]);
1080 rs = &ic->ic_sup_rates[mode];
1081 for (i = 0; i < rs->rs_nrates; i++) {
1082 mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode);
1085 rate = ieee80211_media2rate(mword);
1086 printf("%s%d%sMbps", (i != 0 ? " " : ""),
1087 rate / 2, ((rate & 0x1) != 0 ? ".5" : ""));
1091 ieee80211_ht_announce(ic);
1095 ieee80211_announce_channels(struct ieee80211com *ic)
1097 const struct ieee80211_channel *c;
1101 printf("Chan Freq CW RegPwr MinPwr MaxPwr\n");
1102 for (i = 0; i < ic->ic_nchans; i++) {
1103 c = &ic->ic_channels[i];
1104 if (IEEE80211_IS_CHAN_ST(c))
1106 else if (IEEE80211_IS_CHAN_108A(c))
1108 else if (IEEE80211_IS_CHAN_108G(c))
1110 else if (IEEE80211_IS_CHAN_HT(c))
1112 else if (IEEE80211_IS_CHAN_A(c))
1114 else if (IEEE80211_IS_CHAN_ANYG(c))
1116 else if (IEEE80211_IS_CHAN_B(c))
1120 if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c))
1122 else if (IEEE80211_IS_CHAN_HALF(c))
1124 else if (IEEE80211_IS_CHAN_QUARTER(c))
1128 printf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n"
1129 , c->ic_ieee, c->ic_freq, type
1131 , IEEE80211_IS_CHAN_HT40U(c) ? '+' :
1132 IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' '
1134 , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0
1135 , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0
1141 media2mode(const struct ifmedia_entry *ime, uint32_t flags, uint16_t *mode)
1143 switch (IFM_MODE(ime->ifm_media)) {
1144 case IFM_IEEE80211_11A:
1145 *mode = IEEE80211_MODE_11A;
1147 case IFM_IEEE80211_11B:
1148 *mode = IEEE80211_MODE_11B;
1150 case IFM_IEEE80211_11G:
1151 *mode = IEEE80211_MODE_11G;
1153 case IFM_IEEE80211_FH:
1154 *mode = IEEE80211_MODE_FH;
1156 case IFM_IEEE80211_11NA:
1157 *mode = IEEE80211_MODE_11NA;
1159 case IFM_IEEE80211_11NG:
1160 *mode = IEEE80211_MODE_11NG;
1163 *mode = IEEE80211_MODE_AUTO;
1169 * Turbo mode is an ``option''.
1170 * XXX does not apply to AUTO
1172 if (ime->ifm_media & IFM_IEEE80211_TURBO) {
1173 if (*mode == IEEE80211_MODE_11A) {
1174 if (flags & IEEE80211_F_TURBOP)
1175 *mode = IEEE80211_MODE_TURBO_A;
1177 *mode = IEEE80211_MODE_STURBO_A;
1178 } else if (*mode == IEEE80211_MODE_11G)
1179 *mode = IEEE80211_MODE_TURBO_G;
1188 * Handle a media change request on the underlying interface.
1191 ieee80211com_media_change(struct ifnet *ifp)
1197 * Handle a media change request on the vap interface.
1200 ieee80211_media_change(struct ifnet *ifp)
1202 struct ieee80211vap *vap = ifp->if_softc;
1203 struct ifmedia_entry *ime = vap->iv_media.ifm_cur;
1206 if (!media2mode(ime, vap->iv_flags, &newmode))
1208 if (vap->iv_des_mode != newmode) {
1209 vap->iv_des_mode = newmode;
1216 * Common code to calculate the media status word
1217 * from the operating mode and channel state.
1220 media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan)
1224 status = IFM_IEEE80211;
1226 case IEEE80211_M_STA:
1228 case IEEE80211_M_IBSS:
1229 status |= IFM_IEEE80211_ADHOC;
1231 case IEEE80211_M_HOSTAP:
1232 status |= IFM_IEEE80211_HOSTAP;
1234 case IEEE80211_M_MONITOR:
1235 status |= IFM_IEEE80211_MONITOR;
1237 case IEEE80211_M_AHDEMO:
1238 status |= IFM_IEEE80211_ADHOC | IFM_FLAG0;
1240 case IEEE80211_M_WDS:
1241 status |= IFM_IEEE80211_WDS;
1244 if (IEEE80211_IS_CHAN_HTA(chan)) {
1245 status |= IFM_IEEE80211_11NA;
1246 } else if (IEEE80211_IS_CHAN_HTG(chan)) {
1247 status |= IFM_IEEE80211_11NG;
1248 } else if (IEEE80211_IS_CHAN_A(chan)) {
1249 status |= IFM_IEEE80211_11A;
1250 } else if (IEEE80211_IS_CHAN_B(chan)) {
1251 status |= IFM_IEEE80211_11B;
1252 } else if (IEEE80211_IS_CHAN_ANYG(chan)) {
1253 status |= IFM_IEEE80211_11G;
1254 } else if (IEEE80211_IS_CHAN_FHSS(chan)) {
1255 status |= IFM_IEEE80211_FH;
1257 /* XXX else complain? */
1259 if (IEEE80211_IS_CHAN_TURBO(chan))
1260 status |= IFM_IEEE80211_TURBO;
1262 if (IEEE80211_IS_CHAN_HT20(chan))
1263 status |= IFM_IEEE80211_HT20;
1264 if (IEEE80211_IS_CHAN_HT40(chan))
1265 status |= IFM_IEEE80211_HT40;
1271 ieee80211com_media_status(struct ifnet *ifp, struct ifmediareq *imr)
1273 struct ieee80211com *ic = ifp->if_l2com;
1274 struct ieee80211vap *vap;
1276 imr->ifm_status = IFM_AVALID;
1277 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
1278 if (vap->iv_ifp->if_flags & IFF_UP) {
1279 imr->ifm_status |= IFM_ACTIVE;
1282 imr->ifm_active = media_status(ic->ic_opmode, ic->ic_curchan);
1283 if (imr->ifm_status & IFM_ACTIVE)
1284 imr->ifm_current = imr->ifm_active;
1288 ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr)
1290 struct ieee80211vap *vap = ifp->if_softc;
1291 struct ieee80211com *ic = vap->iv_ic;
1292 enum ieee80211_phymode mode;
1294 imr->ifm_status = IFM_AVALID;
1296 * NB: use the current channel's mode to lock down a xmit
1297 * rate only when running; otherwise we may have a mismatch
1298 * in which case the rate will not be convertible.
1300 if (vap->iv_state == IEEE80211_S_RUN) {
1301 imr->ifm_status |= IFM_ACTIVE;
1302 mode = ieee80211_chan2mode(ic->ic_curchan);
1304 mode = IEEE80211_MODE_AUTO;
1305 imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan);
1307 * Calculate a current rate if possible.
1309 if (vap->iv_txparms[mode].ucastrate != IEEE80211_FIXED_RATE_NONE) {
1311 * A fixed rate is set, report that.
1313 imr->ifm_active |= ieee80211_rate2media(ic,
1314 vap->iv_txparms[mode].ucastrate, mode);
1315 } else if (vap->iv_opmode == IEEE80211_M_STA) {
1317 * In station mode report the current transmit rate.
1319 imr->ifm_active |= ieee80211_rate2media(ic,
1320 vap->iv_bss->ni_txrate, mode);
1322 imr->ifm_active |= IFM_AUTO;
1323 if (imr->ifm_status & IFM_ACTIVE)
1324 imr->ifm_current = imr->ifm_active;
1328 * Set the current phy mode and recalculate the active channel
1329 * set based on the available channels for this mode. Also
1330 * select a new default/current channel if the current one is
1331 * inappropriate for this mode.
1334 ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode)
1337 * Adjust basic rates in 11b/11g supported rate set.
1338 * Note that if operating on a hal/quarter rate channel
1339 * this is a noop as those rates sets are different
1342 if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B)
1343 ieee80211_setbasicrates(&ic->ic_sup_rates[mode], mode);
1345 ic->ic_curmode = mode;
1346 ieee80211_reset_erp(ic); /* reset ERP state */
1352 * Return the phy mode for with the specified channel.
1354 enum ieee80211_phymode
1355 ieee80211_chan2mode(const struct ieee80211_channel *chan)
1358 if (IEEE80211_IS_CHAN_HTA(chan))
1359 return IEEE80211_MODE_11NA;
1360 else if (IEEE80211_IS_CHAN_HTG(chan))
1361 return IEEE80211_MODE_11NG;
1362 else if (IEEE80211_IS_CHAN_108G(chan))
1363 return IEEE80211_MODE_TURBO_G;
1364 else if (IEEE80211_IS_CHAN_ST(chan))
1365 return IEEE80211_MODE_STURBO_A;
1366 else if (IEEE80211_IS_CHAN_TURBO(chan))
1367 return IEEE80211_MODE_TURBO_A;
1368 else if (IEEE80211_IS_CHAN_HALF(chan))
1369 return IEEE80211_MODE_HALF;
1370 else if (IEEE80211_IS_CHAN_QUARTER(chan))
1371 return IEEE80211_MODE_QUARTER;
1372 else if (IEEE80211_IS_CHAN_A(chan))
1373 return IEEE80211_MODE_11A;
1374 else if (IEEE80211_IS_CHAN_ANYG(chan))
1375 return IEEE80211_MODE_11G;
1376 else if (IEEE80211_IS_CHAN_B(chan))
1377 return IEEE80211_MODE_11B;
1378 else if (IEEE80211_IS_CHAN_FHSS(chan))
1379 return IEEE80211_MODE_FH;
1381 /* NB: should not get here */
1382 printf("%s: cannot map channel to mode; freq %u flags 0x%x\n",
1383 __func__, chan->ic_freq, chan->ic_flags);
1384 return IEEE80211_MODE_11B;
1388 u_int match; /* rate + mode */
1389 u_int media; /* if_media rate */
1393 findmedia(const struct ratemedia rates[], int n, u_int match)
1397 for (i = 0; i < n; i++)
1398 if (rates[i].match == match)
1399 return rates[i].media;
1404 * Convert IEEE80211 rate value to ifmedia subtype.
1405 * Rate is either a legacy rate in units of 0.5Mbps
1409 ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode)
1411 #define N(a) (sizeof(a) / sizeof(a[0]))
1412 static const struct ratemedia rates[] = {
1413 { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 },
1414 { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 },
1415 { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 },
1416 { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 },
1417 { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 },
1418 { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 },
1419 { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 },
1420 { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 },
1421 { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 },
1422 { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 },
1423 { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 },
1424 { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 },
1425 { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 },
1426 { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 },
1427 { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 },
1428 { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 },
1429 { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 },
1430 { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 },
1431 { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 },
1432 { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 },
1433 { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 },
1434 { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 },
1435 { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 },
1436 { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 },
1437 { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 },
1438 { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 },
1439 { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 },
1440 { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 },
1441 { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 },
1442 { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 },
1443 /* NB: OFDM72 doesn't realy exist so we don't handle it */
1445 static const struct ratemedia htrates[] = {
1446 { 0, IFM_IEEE80211_MCS },
1447 { 1, IFM_IEEE80211_MCS },
1448 { 2, IFM_IEEE80211_MCS },
1449 { 3, IFM_IEEE80211_MCS },
1450 { 4, IFM_IEEE80211_MCS },
1451 { 5, IFM_IEEE80211_MCS },
1452 { 6, IFM_IEEE80211_MCS },
1453 { 7, IFM_IEEE80211_MCS },
1454 { 8, IFM_IEEE80211_MCS },
1455 { 9, IFM_IEEE80211_MCS },
1456 { 10, IFM_IEEE80211_MCS },
1457 { 11, IFM_IEEE80211_MCS },
1458 { 12, IFM_IEEE80211_MCS },
1459 { 13, IFM_IEEE80211_MCS },
1460 { 14, IFM_IEEE80211_MCS },
1461 { 15, IFM_IEEE80211_MCS },
1466 * Check 11n rates first for match as an MCS.
1468 if (mode == IEEE80211_MODE_11NA) {
1469 if (rate & IEEE80211_RATE_MCS) {
1470 rate &= ~IEEE80211_RATE_MCS;
1471 m = findmedia(htrates, N(htrates), rate);
1473 return m | IFM_IEEE80211_11NA;
1475 } else if (mode == IEEE80211_MODE_11NG) {
1476 /* NB: 12 is ambiguous, it will be treated as an MCS */
1477 if (rate & IEEE80211_RATE_MCS) {
1478 rate &= ~IEEE80211_RATE_MCS;
1479 m = findmedia(htrates, N(htrates), rate);
1481 return m | IFM_IEEE80211_11NG;
1484 rate &= IEEE80211_RATE_VAL;
1486 case IEEE80211_MODE_11A:
1487 case IEEE80211_MODE_HALF: /* XXX good 'nuf */
1488 case IEEE80211_MODE_QUARTER:
1489 case IEEE80211_MODE_11NA:
1490 case IEEE80211_MODE_TURBO_A:
1491 case IEEE80211_MODE_STURBO_A:
1492 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11A);
1493 case IEEE80211_MODE_11B:
1494 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11B);
1495 case IEEE80211_MODE_FH:
1496 return findmedia(rates, N(rates), rate | IFM_IEEE80211_FH);
1497 case IEEE80211_MODE_AUTO:
1498 /* NB: ic may be NULL for some drivers */
1499 if (ic != NULL && ic->ic_phytype == IEEE80211_T_FH)
1500 return findmedia(rates, N(rates),
1501 rate | IFM_IEEE80211_FH);
1502 /* NB: hack, 11g matches both 11b+11a rates */
1504 case IEEE80211_MODE_11G:
1505 case IEEE80211_MODE_11NG:
1506 case IEEE80211_MODE_TURBO_G:
1507 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11G);
1514 ieee80211_media2rate(int mword)
1516 #define N(a) (sizeof(a) / sizeof(a[0]))
1517 static const int ieeerates[] = {
1521 2, /* IFM_IEEE80211_FH1 */
1522 4, /* IFM_IEEE80211_FH2 */
1523 2, /* IFM_IEEE80211_DS1 */
1524 4, /* IFM_IEEE80211_DS2 */
1525 11, /* IFM_IEEE80211_DS5 */
1526 22, /* IFM_IEEE80211_DS11 */
1527 44, /* IFM_IEEE80211_DS22 */
1528 12, /* IFM_IEEE80211_OFDM6 */
1529 18, /* IFM_IEEE80211_OFDM9 */
1530 24, /* IFM_IEEE80211_OFDM12 */
1531 36, /* IFM_IEEE80211_OFDM18 */
1532 48, /* IFM_IEEE80211_OFDM24 */
1533 72, /* IFM_IEEE80211_OFDM36 */
1534 96, /* IFM_IEEE80211_OFDM48 */
1535 108, /* IFM_IEEE80211_OFDM54 */
1536 144, /* IFM_IEEE80211_OFDM72 */
1537 0, /* IFM_IEEE80211_DS354k */
1538 0, /* IFM_IEEE80211_DS512k */
1539 6, /* IFM_IEEE80211_OFDM3 */
1540 9, /* IFM_IEEE80211_OFDM4 */
1541 54, /* IFM_IEEE80211_OFDM27 */
1542 -1, /* IFM_IEEE80211_MCS */
1544 return IFM_SUBTYPE(mword) < N(ieeerates) ?
1545 ieeerates[IFM_SUBTYPE(mword)] : 0;