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 202612 2010-01-19 05:00:57Z thompsa $
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>
46 #include <net/route.h>
48 #include <netproto/802_11/ieee80211_var.h>
49 #include <netproto/802_11/ieee80211_regdomain.h>
50 #ifdef IEEE80211_SUPPORT_SUPERG
51 #include <netproto/802_11/ieee80211_superg.h>
56 const char *ieee80211_phymode_name[IEEE80211_MODE_MAX] = {
57 [IEEE80211_MODE_AUTO] = "auto",
58 [IEEE80211_MODE_11A] = "11a",
59 [IEEE80211_MODE_11B] = "11b",
60 [IEEE80211_MODE_11G] = "11g",
61 [IEEE80211_MODE_FH] = "FH",
62 [IEEE80211_MODE_TURBO_A] = "turboA",
63 [IEEE80211_MODE_TURBO_G] = "turboG",
64 [IEEE80211_MODE_STURBO_A] = "sturboA",
65 [IEEE80211_MODE_HALF] = "half",
66 [IEEE80211_MODE_QUARTER] = "quarter",
67 [IEEE80211_MODE_11NA] = "11na",
68 [IEEE80211_MODE_11NG] = "11ng",
70 /* map ieee80211_opmode to the corresponding capability bit */
71 const int ieee80211_opcap[IEEE80211_OPMODE_MAX] = {
72 [IEEE80211_M_IBSS] = IEEE80211_C_IBSS,
73 [IEEE80211_M_WDS] = IEEE80211_C_WDS,
74 [IEEE80211_M_STA] = IEEE80211_C_STA,
75 [IEEE80211_M_AHDEMO] = IEEE80211_C_AHDEMO,
76 [IEEE80211_M_HOSTAP] = IEEE80211_C_HOSTAP,
77 [IEEE80211_M_MONITOR] = IEEE80211_C_MONITOR,
78 #ifdef IEEE80211_SUPPORT_MESH
79 [IEEE80211_M_MBSS] = IEEE80211_C_MBSS,
83 static const uint8_t ieee80211broadcastaddr[IEEE80211_ADDR_LEN] =
84 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
86 static void ieee80211_syncflag_locked(struct ieee80211com *ic, int flag);
87 static void ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag);
88 static void ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag);
89 static int ieee80211_media_setup(struct ieee80211com *ic,
90 struct ifmedia *media, int caps, int addsta,
91 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat);
92 static void ieee80211com_media_status(struct ifnet *, struct ifmediareq *);
93 static int ieee80211com_media_change(struct ifnet *);
94 static int media_status(enum ieee80211_opmode,
95 const struct ieee80211_channel *);
97 MALLOC_DEFINE(M_80211_VAP, "80211vap", "802.11 vap state");
100 * Default supported rates for 802.11 operation (in IEEE .5Mb units).
102 #define B(r) ((r) | IEEE80211_RATE_BASIC)
103 static const struct ieee80211_rateset ieee80211_rateset_11a =
104 { 8, { B(12), 18, B(24), 36, B(48), 72, 96, 108 } };
105 static const struct ieee80211_rateset ieee80211_rateset_half =
106 { 8, { B(6), 9, B(12), 18, B(24), 36, 48, 54 } };
107 static const struct ieee80211_rateset ieee80211_rateset_quarter =
108 { 8, { B(3), 4, B(6), 9, B(12), 18, 24, 27 } };
109 static const struct ieee80211_rateset ieee80211_rateset_11b =
110 { 4, { B(2), B(4), B(11), B(22) } };
111 /* NB: OFDM rates are handled specially based on mode */
112 static const struct ieee80211_rateset ieee80211_rateset_11g =
113 { 12, { B(2), B(4), B(11), B(22), 12, 18, 24, 36, 48, 72, 96, 108 } };
117 * Fill in 802.11 available channel set, mark
118 * all available channels as active, and pick
119 * a default channel if not already specified.
122 ieee80211_chan_init(struct ieee80211com *ic)
124 #define DEFAULTRATES(m, def) do { \
125 if (ic->ic_sup_rates[m].rs_nrates == 0) \
126 ic->ic_sup_rates[m] = def; \
128 struct ieee80211_channel *c;
131 KASSERT(0 < ic->ic_nchans && ic->ic_nchans <= IEEE80211_CHAN_MAX,
132 ("invalid number of channels specified: %u", ic->ic_nchans));
133 memset(ic->ic_chan_avail, 0, sizeof(ic->ic_chan_avail));
134 memset(ic->ic_modecaps, 0, sizeof(ic->ic_modecaps));
135 setbit(ic->ic_modecaps, IEEE80211_MODE_AUTO);
136 for (i = 0; i < ic->ic_nchans; i++) {
137 c = &ic->ic_channels[i];
138 KASSERT(c->ic_flags != 0, ("channel with no flags"));
140 * Help drivers that work only with frequencies by filling
141 * in IEEE channel #'s if not already calculated. Note this
142 * mimics similar work done in ieee80211_setregdomain when
143 * changing regulatory state.
146 c->ic_ieee = ieee80211_mhz2ieee(c->ic_freq,c->ic_flags);
147 if (IEEE80211_IS_CHAN_HT40(c) && c->ic_extieee == 0)
148 c->ic_extieee = ieee80211_mhz2ieee(c->ic_freq +
149 (IEEE80211_IS_CHAN_HT40U(c) ? 20 : -20),
151 /* default max tx power to max regulatory */
152 if (c->ic_maxpower == 0)
153 c->ic_maxpower = 2*c->ic_maxregpower;
154 setbit(ic->ic_chan_avail, c->ic_ieee);
156 * Identify mode capabilities.
158 if (IEEE80211_IS_CHAN_A(c))
159 setbit(ic->ic_modecaps, IEEE80211_MODE_11A);
160 if (IEEE80211_IS_CHAN_B(c))
161 setbit(ic->ic_modecaps, IEEE80211_MODE_11B);
162 if (IEEE80211_IS_CHAN_ANYG(c))
163 setbit(ic->ic_modecaps, IEEE80211_MODE_11G);
164 if (IEEE80211_IS_CHAN_FHSS(c))
165 setbit(ic->ic_modecaps, IEEE80211_MODE_FH);
166 if (IEEE80211_IS_CHAN_108A(c))
167 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_A);
168 if (IEEE80211_IS_CHAN_108G(c))
169 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_G);
170 if (IEEE80211_IS_CHAN_ST(c))
171 setbit(ic->ic_modecaps, IEEE80211_MODE_STURBO_A);
172 if (IEEE80211_IS_CHAN_HALF(c))
173 setbit(ic->ic_modecaps, IEEE80211_MODE_HALF);
174 if (IEEE80211_IS_CHAN_QUARTER(c))
175 setbit(ic->ic_modecaps, IEEE80211_MODE_QUARTER);
176 if (IEEE80211_IS_CHAN_HTA(c))
177 setbit(ic->ic_modecaps, IEEE80211_MODE_11NA);
178 if (IEEE80211_IS_CHAN_HTG(c))
179 setbit(ic->ic_modecaps, IEEE80211_MODE_11NG);
181 /* initialize candidate channels to all available */
182 memcpy(ic->ic_chan_active, ic->ic_chan_avail,
183 sizeof(ic->ic_chan_avail));
185 /* sort channel table to allow lookup optimizations */
186 ieee80211_sort_channels(ic->ic_channels, ic->ic_nchans);
188 /* invalidate any previous state */
189 ic->ic_bsschan = IEEE80211_CHAN_ANYC;
190 ic->ic_prevchan = NULL;
191 ic->ic_csa_newchan = NULL;
192 /* arbitrarily pick the first channel */
193 ic->ic_curchan = &ic->ic_channels[0];
194 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
196 /* fillin well-known rate sets if driver has not specified */
197 DEFAULTRATES(IEEE80211_MODE_11B, ieee80211_rateset_11b);
198 DEFAULTRATES(IEEE80211_MODE_11G, ieee80211_rateset_11g);
199 DEFAULTRATES(IEEE80211_MODE_11A, ieee80211_rateset_11a);
200 DEFAULTRATES(IEEE80211_MODE_TURBO_A, ieee80211_rateset_11a);
201 DEFAULTRATES(IEEE80211_MODE_TURBO_G, ieee80211_rateset_11g);
202 DEFAULTRATES(IEEE80211_MODE_STURBO_A, ieee80211_rateset_11a);
203 DEFAULTRATES(IEEE80211_MODE_HALF, ieee80211_rateset_half);
204 DEFAULTRATES(IEEE80211_MODE_QUARTER, ieee80211_rateset_quarter);
205 DEFAULTRATES(IEEE80211_MODE_11NA, ieee80211_rateset_11a);
206 DEFAULTRATES(IEEE80211_MODE_11NG, ieee80211_rateset_11g);
209 * Set auto mode to reset active channel state and any desired channel.
211 (void) ieee80211_setmode(ic, IEEE80211_MODE_AUTO);
216 null_update_mcast(struct ifnet *ifp)
218 if_printf(ifp, "need multicast update callback\n");
222 null_update_promisc(struct ifnet *ifp)
224 if_printf(ifp, "need promiscuous mode update callback\n");
228 null_transmit(struct ifnet *ifp, struct mbuf *m)
232 return EACCES; /* XXX EIO/EPERM? */
236 null_output(struct ifnet *ifp, struct mbuf *m,
237 struct sockaddr *dst, struct rtentry *ro)
239 if_printf(ifp, "discard raw packet\n");
240 return null_transmit(ifp, m);
244 null_input(struct ifnet *ifp, struct mbuf *m)
246 if_printf(ifp, "if_input should not be called\n");
251 * Attach/setup the common net80211 state. Called by
252 * the driver on attach to prior to creating any vap's.
255 ieee80211_ifattach(struct ieee80211com *ic,
256 const uint8_t macaddr[IEEE80211_ADDR_LEN])
258 struct ifnet *ifp = ic->ic_ifp;
259 struct sockaddr_dl *sdl;
262 KASSERT(ifp->if_type == IFT_IEEE80211, ("if_type %d", ifp->if_type));
264 IEEE80211_LOCK_INIT(ic, ifp->if_xname);
265 TAILQ_INIT(&ic->ic_vaps);
267 /* Create a taskqueue for all state changes */
268 ic->ic_tq = taskqueue_create("ic_taskq", M_WAITOK | M_ZERO,
269 taskqueue_thread_enqueue, &ic->ic_tq);
270 taskqueue_start_threads(&ic->ic_tq, 1, TDPRI_KERN_DAEMON, -1,
271 "%s taskq", ifp->if_xname);
273 * Fill in 802.11 available channel set, mark all
274 * available channels as active, and pick a default
275 * channel if not already specified.
277 ieee80211_media_init(ic);
279 ic->ic_update_mcast = null_update_mcast;
280 ic->ic_update_promisc = null_update_promisc;
282 ic->ic_hash_key = karc4random();
283 ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT;
284 ic->ic_lintval = ic->ic_bintval;
285 ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX;
287 ieee80211_crypto_attach(ic);
288 ieee80211_node_attach(ic);
289 ieee80211_power_attach(ic);
290 ieee80211_proto_attach(ic);
291 #ifdef IEEE80211_SUPPORT_SUPERG
292 ieee80211_superg_attach(ic);
294 ieee80211_ht_attach(ic);
295 ieee80211_scan_attach(ic);
296 ieee80211_regdomain_attach(ic);
297 ieee80211_dfs_attach(ic);
299 ieee80211_sysctl_attach(ic);
301 ifp->if_addrlen = IEEE80211_ADDR_LEN;
303 if_attach(ifp, NULL);
304 ifp->if_mtu = IEEE80211_MTU_MAX;
305 ifp->if_broadcastaddr = ieee80211broadcastaddr;
306 ifp->if_output = null_output;
307 ifp->if_input = null_input; /* just in case */
308 ifp->if_resolvemulti = NULL; /* NB: callers check */
310 ifa = ifaddr_byindex(ifp->if_index);
311 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__));
312 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
313 sdl->sdl_type = IFT_ETHER; /* XXX IFT_IEEE80211? */
314 sdl->sdl_alen = IEEE80211_ADDR_LEN;
315 IEEE80211_ADDR_COPY(LLADDR(sdl), macaddr);
320 * Detach net80211 state on device detach. Tear down
321 * all vap's and reclaim all common state prior to the
322 * device state going away. Note we may call back into
323 * driver; it must be prepared for this.
326 ieee80211_ifdetach(struct ieee80211com *ic)
328 struct ifnet *ifp = ic->ic_ifp;
329 struct ieee80211vap *vap;
333 while ((vap = TAILQ_FIRST(&ic->ic_vaps)) != NULL)
334 ieee80211_vap_destroy(vap);
335 ieee80211_waitfor_parent(ic);
337 ieee80211_sysctl_detach(ic);
338 ieee80211_dfs_detach(ic);
339 ieee80211_regdomain_detach(ic);
340 ieee80211_scan_detach(ic);
341 #ifdef IEEE80211_SUPPORT_SUPERG
342 ieee80211_superg_detach(ic);
344 ieee80211_ht_detach(ic);
345 /* NB: must be called before ieee80211_node_detach */
346 ieee80211_proto_detach(ic);
347 ieee80211_crypto_detach(ic);
348 ieee80211_power_detach(ic);
349 ieee80211_node_detach(ic);
351 ifmedia_removeall(&ic->ic_media);
352 taskqueue_free(ic->ic_tq);
353 IEEE80211_LOCK_DESTROY(ic);
357 * Default reset method for use with the ioctl support. This
358 * method is invoked after any state change in the 802.11
359 * layer that should be propagated to the hardware but not
360 * require re-initialization of the 802.11 state machine (e.g
361 * rescanning for an ap). We always return ENETRESET which
362 * should cause the driver to re-initialize the device. Drivers
363 * can override this method to implement more optimized support.
366 default_reset(struct ieee80211vap *vap, u_long cmd)
372 * Prepare a vap for use. Drivers use this call to
373 * setup net80211 state in new vap's prior attaching
374 * them with ieee80211_vap_attach (below).
377 ieee80211_vap_setup(struct ieee80211com *ic, struct ieee80211vap *vap,
378 const char name[IFNAMSIZ], int unit, int opmode, int flags,
379 const uint8_t bssid[IEEE80211_ADDR_LEN],
380 const uint8_t macaddr[IEEE80211_ADDR_LEN])
384 ifp = if_alloc(IFT_ETHER);
386 if_printf(ic->ic_ifp, "%s: unable to allocate ifnet\n",
390 if_initname(ifp, name, unit);
391 ifp->if_softc = vap; /* back pointer */
392 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST;
393 ifp->if_start = ieee80211_start;
394 ifp->if_ioctl = ieee80211_ioctl;
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;
444 /* auto-generated or user supplied MAC address */
445 if (flags & (IEEE80211_CLONE_BSSID|IEEE80211_CLONE_MACADDR))
446 vap->iv_flags_ext |= IEEE80211_FEXT_UNIQMAC;
448 * Enable various functionality by default if we're
449 * capable; the driver can override us if it knows better.
451 if (vap->iv_caps & IEEE80211_C_WME)
452 vap->iv_flags |= IEEE80211_F_WME;
453 if (vap->iv_caps & IEEE80211_C_BURST)
454 vap->iv_flags |= IEEE80211_F_BURST;
455 /* NB: bg scanning only makes sense for station mode right now */
456 if (vap->iv_opmode == IEEE80211_M_STA &&
457 (vap->iv_caps & IEEE80211_C_BGSCAN))
458 vap->iv_flags |= IEEE80211_F_BGSCAN;
459 vap->iv_flags |= IEEE80211_F_DOTH; /* XXX no cap, just ena */
460 /* NB: DFS support only makes sense for ap mode right now */
461 if (vap->iv_opmode == IEEE80211_M_HOSTAP &&
462 (vap->iv_caps & IEEE80211_C_DFS))
463 vap->iv_flags_ext |= IEEE80211_FEXT_DFS;
465 vap->iv_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */
466 vap->iv_bmissthreshold = IEEE80211_HWBMISS_DEFAULT;
467 vap->iv_dtim_period = IEEE80211_DTIM_DEFAULT;
469 * Install a default reset method for the ioctl support;
470 * the driver can override this.
472 vap->iv_reset = default_reset;
474 IEEE80211_ADDR_COPY(vap->iv_myaddr, macaddr);
476 ieee80211_sysctl_vattach(vap);
477 ieee80211_crypto_vattach(vap);
478 ieee80211_node_vattach(vap);
479 ieee80211_power_vattach(vap);
480 ieee80211_proto_vattach(vap);
481 #ifdef IEEE80211_SUPPORT_SUPERG
482 ieee80211_superg_vattach(vap);
484 ieee80211_ht_vattach(vap);
485 ieee80211_scan_vattach(vap);
486 ieee80211_regdomain_vattach(vap);
487 ieee80211_radiotap_vattach(vap);
493 * Activate a vap. State should have been prepared with a
494 * call to ieee80211_vap_setup and by the driver. On return
495 * from this call the vap is ready for use.
498 ieee80211_vap_attach(struct ieee80211vap *vap,
499 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat)
501 struct ifnet *ifp = vap->iv_ifp;
502 struct ieee80211com *ic = vap->iv_ic;
503 struct ifmediareq imr;
506 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
507 "%s: %s parent %s flags 0x%x flags_ext 0x%x\n",
508 __func__, ieee80211_opmode_name[vap->iv_opmode],
509 ic->ic_ifp->if_xname, vap->iv_flags, vap->iv_flags_ext);
512 * Do late attach work that cannot happen until after
513 * the driver has had a chance to override defaults.
515 ieee80211_node_latevattach(vap);
516 ieee80211_power_latevattach(vap);
518 maxrate = ieee80211_media_setup(ic, &vap->iv_media, vap->iv_caps,
519 vap->iv_opmode == IEEE80211_M_STA, media_change, media_stat);
520 ieee80211_media_status(ifp, &imr);
521 /* NB: strip explicit mode; we're actually in autoselect */
522 ifmedia_set(&vap->iv_media,
523 imr.ifm_active &~ (IFM_MMASK | IFM_IEEE80211_TURBO));
525 ifp->if_baudrate = IF_Mbps(maxrate);
527 ether_ifattach(ifp, vap->iv_myaddr, NULL);
528 if (vap->iv_opmode == IEEE80211_M_MONITOR) {
529 /* NB: disallow transmit */
530 ifp->if_transmit = null_transmit;
531 ifp->if_output = null_output;
533 /* hook output method setup by ether_ifattach */
534 vap->iv_output = ifp->if_output;
535 ifp->if_output = ieee80211_output;
537 /* NB: if_mtu set by ether_ifattach to ETHERMTU */
540 TAILQ_INSERT_TAIL(&ic->ic_vaps, vap, iv_next);
541 ieee80211_syncflag_locked(ic, IEEE80211_F_WME);
542 #ifdef IEEE80211_SUPPORT_SUPERG
543 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP);
545 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF);
546 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST);
547 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT);
548 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40);
549 ieee80211_syncifflag_locked(ic, IFF_PROMISC);
550 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI);
551 IEEE80211_UNLOCK(ic);
557 * Tear down vap state and reclaim the ifnet.
558 * The driver is assumed to have prepared for
559 * this; e.g. by turning off interrupts for the
563 ieee80211_vap_detach(struct ieee80211vap *vap)
565 struct ieee80211com *ic = vap->iv_ic;
566 struct ifnet *ifp = vap->iv_ifp;
568 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s parent %s\n",
569 __func__, ieee80211_opmode_name[vap->iv_opmode],
570 ic->ic_ifp->if_xname);
572 /* NB: bpfdetach is called by ether_ifdetach and claims all taps */
578 * Flush any deferred vap tasks.
580 ieee80211_draintask(ic, &vap->iv_nstate_task);
581 ieee80211_draintask(ic, &vap->iv_swbmiss_task);
583 /* XXX band-aid until ifnet handles this for us */
584 taskqueue_drain(taskqueue_swi, &ifp->if_linktask);
587 KASSERT(vap->iv_state == IEEE80211_S_INIT , ("vap still running"));
588 TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next);
589 ieee80211_syncflag_locked(ic, IEEE80211_F_WME);
590 #ifdef IEEE80211_SUPPORT_SUPERG
591 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP);
593 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF);
594 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST);
595 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT);
596 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40);
597 /* NB: this handles the bpfdetach done below */
598 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_BPF);
599 ieee80211_syncifflag_locked(ic, IFF_PROMISC);
600 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI);
601 IEEE80211_UNLOCK(ic);
603 ifmedia_removeall(&vap->iv_media);
605 ieee80211_radiotap_vdetach(vap);
606 ieee80211_regdomain_vdetach(vap);
607 ieee80211_scan_vdetach(vap);
608 #ifdef IEEE80211_SUPPORT_SUPERG
609 ieee80211_superg_vdetach(vap);
611 ieee80211_ht_vdetach(vap);
612 /* NB: must be before ieee80211_node_vdetach */
613 ieee80211_proto_vdetach(vap);
614 ieee80211_crypto_vdetach(vap);
615 ieee80211_power_vdetach(vap);
616 ieee80211_node_vdetach(vap);
617 ieee80211_sysctl_vdetach(vap);
623 * Synchronize flag bit state in the parent ifnet structure
624 * according to the state of all vap ifnet's. This is used,
625 * for example, to handle IFF_PROMISC and IFF_ALLMULTI.
628 ieee80211_syncifflag_locked(struct ieee80211com *ic, int flag)
630 struct ifnet *ifp = ic->ic_ifp;
631 struct ieee80211vap *vap;
634 IEEE80211_LOCK_ASSERT(ic);
637 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
638 if (vap->iv_ifp->if_flags & flag) {
640 * XXX the bridge sets PROMISC but we don't want to
641 * enable it on the device, discard here so all the
642 * drivers don't need to special-case it
644 if (flag == IFF_PROMISC &&
645 !(vap->iv_opmode == IEEE80211_M_MONITOR ||
646 (vap->iv_opmode == IEEE80211_M_AHDEMO &&
647 (vap->iv_caps & IEEE80211_C_TDMA) == 0)))
652 oflags = ifp->if_flags;
654 ifp->if_flags |= flag;
656 ifp->if_flags &= ~flag;
657 if ((ifp->if_flags ^ oflags) & flag) {
658 /* XXX should we return 1/0 and let caller do this? */
659 if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
660 if (flag == IFF_PROMISC)
661 ieee80211_runtask(ic, &ic->ic_promisc_task);
662 else if (flag == IFF_ALLMULTI)
663 ieee80211_runtask(ic, &ic->ic_mcast_task);
669 * Synchronize flag bit state in the com structure
670 * according to the state of all vap's. This is used,
671 * for example, to handle state changes via ioctls.
674 ieee80211_syncflag_locked(struct ieee80211com *ic, int flag)
676 struct ieee80211vap *vap;
679 IEEE80211_LOCK_ASSERT(ic);
682 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
683 if (vap->iv_flags & flag) {
688 ic->ic_flags |= flag;
690 ic->ic_flags &= ~flag;
694 ieee80211_syncflag(struct ieee80211vap *vap, int flag)
696 struct ieee80211com *ic = vap->iv_ic;
701 vap->iv_flags &= ~flag;
703 vap->iv_flags |= flag;
704 ieee80211_syncflag_locked(ic, flag);
705 IEEE80211_UNLOCK(ic);
709 * Synchronize flags_ht bit state in the com structure
710 * according to the state of all vap's. This is used,
711 * for example, to handle state changes via ioctls.
714 ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag)
716 struct ieee80211vap *vap;
719 IEEE80211_LOCK_ASSERT(ic);
722 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
723 if (vap->iv_flags_ht & flag) {
728 ic->ic_flags_ht |= flag;
730 ic->ic_flags_ht &= ~flag;
734 ieee80211_syncflag_ht(struct ieee80211vap *vap, int flag)
736 struct ieee80211com *ic = vap->iv_ic;
741 vap->iv_flags_ht &= ~flag;
743 vap->iv_flags_ht |= flag;
744 ieee80211_syncflag_ht_locked(ic, flag);
745 IEEE80211_UNLOCK(ic);
749 * Synchronize flags_ext bit state in the com structure
750 * according to the state of all vap's. This is used,
751 * for example, to handle state changes via ioctls.
754 ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag)
756 struct ieee80211vap *vap;
759 IEEE80211_LOCK_ASSERT(ic);
762 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
763 if (vap->iv_flags_ext & flag) {
768 ic->ic_flags_ext |= flag;
770 ic->ic_flags_ext &= ~flag;
774 ieee80211_syncflag_ext(struct ieee80211vap *vap, int flag)
776 struct ieee80211com *ic = vap->iv_ic;
781 vap->iv_flags_ext &= ~flag;
783 vap->iv_flags_ext |= flag;
784 ieee80211_syncflag_ext_locked(ic, flag);
785 IEEE80211_UNLOCK(ic);
789 mapgsm(u_int freq, u_int flags)
792 if (flags & IEEE80211_CHAN_QUARTER)
794 else if (flags & IEEE80211_CHAN_HALF)
798 /* NB: there is no 907/20 wide but leave room */
799 return (freq - 906*10) / 5;
803 mappsb(u_int freq, u_int flags)
805 return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5;
809 * Convert MHz frequency to IEEE channel number.
812 ieee80211_mhz2ieee(u_int freq, u_int flags)
814 #define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990)
815 if (flags & IEEE80211_CHAN_GSM)
816 return mapgsm(freq, flags);
817 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
821 return ((int) freq - 2407) / 5;
823 return 15 + ((freq - 2512) / 20);
824 } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */
826 /* XXX check regdomain? */
827 if (IS_FREQ_IN_PSB(freq))
828 return mappsb(freq, flags);
829 return (freq - 4000) / 5;
831 return (freq - 5000) / 5;
832 } else { /* either, guess */
836 if (907 <= freq && freq <= 922)
837 return mapgsm(freq, flags);
838 return ((int) freq - 2407) / 5;
841 if (IS_FREQ_IN_PSB(freq))
842 return mappsb(freq, flags);
843 else if (freq > 4900)
844 return (freq - 4000) / 5;
846 return 15 + ((freq - 2512) / 20);
848 return (freq - 5000) / 5;
850 #undef IS_FREQ_IN_PSB
854 * Convert channel to IEEE channel number.
857 ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c)
860 if_printf(ic->ic_ifp, "invalid channel (NULL)\n");
863 return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee);
867 * Convert IEEE channel number to MHz frequency.
870 ieee80211_ieee2mhz(u_int chan, u_int flags)
872 if (flags & IEEE80211_CHAN_GSM)
873 return 907 + 5 * (chan / 10);
874 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
878 return 2407 + chan*5;
880 return 2512 + ((chan-15)*20);
881 } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */
882 if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) {
884 return 4940 + chan*5 + (chan % 5 ? 2 : 0);
886 return 5000 + (chan*5);
887 } else { /* either, guess */
888 /* XXX can't distinguish PSB+GSM channels */
891 if (chan < 14) /* 0-13 */
892 return 2407 + chan*5;
893 if (chan < 27) /* 15-26 */
894 return 2512 + ((chan-15)*20);
895 return 5000 + (chan*5);
900 * Locate a channel given a frequency+flags. We cache
901 * the previous lookup to optimize switching between two
902 * channels--as happens with dynamic turbo.
904 struct ieee80211_channel *
905 ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags)
907 struct ieee80211_channel *c;
910 flags &= IEEE80211_CHAN_ALLTURBO;
912 if (c != NULL && c->ic_freq == freq &&
913 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
915 /* brute force search */
916 for (i = 0; i < ic->ic_nchans; i++) {
917 c = &ic->ic_channels[i];
918 if (c->ic_freq == freq &&
919 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
926 * Locate a channel given a channel number+flags. We cache
927 * the previous lookup to optimize switching between two
928 * channels--as happens with dynamic turbo.
930 struct ieee80211_channel *
931 ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags)
933 struct ieee80211_channel *c;
936 flags &= IEEE80211_CHAN_ALLTURBO;
938 if (c != NULL && c->ic_ieee == ieee &&
939 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
941 /* brute force search */
942 for (i = 0; i < ic->ic_nchans; i++) {
943 c = &ic->ic_channels[i];
944 if (c->ic_ieee == ieee &&
945 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
952 addmedia(struct ifmedia *media, int caps, int addsta, int mode, int mword)
954 #define ADD(_ic, _s, _o) \
956 IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL)
957 static const u_int mopts[IEEE80211_MODE_MAX] = {
958 [IEEE80211_MODE_AUTO] = IFM_AUTO,
959 [IEEE80211_MODE_11A] = IFM_IEEE80211_11A,
960 [IEEE80211_MODE_11B] = IFM_IEEE80211_11B,
961 [IEEE80211_MODE_11G] = IFM_IEEE80211_11G,
962 [IEEE80211_MODE_FH] = IFM_IEEE80211_FH,
963 [IEEE80211_MODE_TURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO,
964 [IEEE80211_MODE_TURBO_G] = IFM_IEEE80211_11G|IFM_IEEE80211_TURBO,
965 [IEEE80211_MODE_STURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO,
966 [IEEE80211_MODE_HALF] = IFM_IEEE80211_11A, /* XXX */
967 [IEEE80211_MODE_QUARTER] = IFM_IEEE80211_11A, /* XXX */
968 [IEEE80211_MODE_11NA] = IFM_IEEE80211_11NA,
969 [IEEE80211_MODE_11NG] = IFM_IEEE80211_11NG,
975 ADD(ic, mword, mopt); /* STA mode has no cap */
976 if (caps & IEEE80211_C_IBSS)
977 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC);
978 if (caps & IEEE80211_C_HOSTAP)
979 ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP);
980 if (caps & IEEE80211_C_AHDEMO)
981 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0);
982 if (caps & IEEE80211_C_MONITOR)
983 ADD(media, mword, mopt | IFM_IEEE80211_MONITOR);
984 if (caps & IEEE80211_C_WDS)
985 ADD(media, mword, mopt | IFM_IEEE80211_WDS);
986 if (caps & IEEE80211_C_MBSS)
987 ADD(media, mword, mopt | IFM_IEEE80211_MBSS);
992 * Setup the media data structures according to the channel and
996 ieee80211_media_setup(struct ieee80211com *ic,
997 struct ifmedia *media, int caps, int addsta,
998 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat)
1000 int i, j, mode, rate, maxrate, mword, r;
1001 const struct ieee80211_rateset *rs;
1002 struct ieee80211_rateset allrates;
1005 * Fill in media characteristics.
1007 ifmedia_init(media, 0, media_change, media_stat);
1010 * Add media for legacy operating modes.
1012 memset(&allrates, 0, sizeof(allrates));
1013 for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) {
1014 if (isclr(ic->ic_modecaps, mode))
1016 addmedia(media, caps, addsta, mode, IFM_AUTO);
1017 if (mode == IEEE80211_MODE_AUTO)
1019 rs = &ic->ic_sup_rates[mode];
1020 for (i = 0; i < rs->rs_nrates; i++) {
1021 rate = rs->rs_rates[i];
1022 mword = ieee80211_rate2media(ic, rate, mode);
1025 addmedia(media, caps, addsta, mode, mword);
1027 * Add legacy rate to the collection of all rates.
1029 r = rate & IEEE80211_RATE_VAL;
1030 for (j = 0; j < allrates.rs_nrates; j++)
1031 if (allrates.rs_rates[j] == r)
1033 if (j == allrates.rs_nrates) {
1034 /* unique, add to the set */
1035 allrates.rs_rates[j] = r;
1036 allrates.rs_nrates++;
1038 rate = (rate & IEEE80211_RATE_VAL) / 2;
1043 for (i = 0; i < allrates.rs_nrates; i++) {
1044 mword = ieee80211_rate2media(ic, allrates.rs_rates[i],
1045 IEEE80211_MODE_AUTO);
1048 /* NB: remove media options from mword */
1049 addmedia(media, caps, addsta,
1050 IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword));
1053 * Add HT/11n media. Note that we do not have enough
1054 * bits in the media subtype to express the MCS so we
1055 * use a "placeholder" media subtype and any fixed MCS
1056 * must be specified with a different mechanism.
1058 for (; mode <= IEEE80211_MODE_11NG; mode++) {
1059 if (isclr(ic->ic_modecaps, mode))
1061 addmedia(media, caps, addsta, mode, IFM_AUTO);
1062 addmedia(media, caps, addsta, mode, IFM_IEEE80211_MCS);
1064 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) ||
1065 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) {
1066 addmedia(media, caps, addsta,
1067 IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS);
1068 /* XXX could walk htrates */
1069 /* XXX known array size */
1070 if (ieee80211_htrates[15].ht40_rate_400ns > maxrate)
1071 maxrate = ieee80211_htrates[15].ht40_rate_400ns;
1077 ieee80211_media_init(struct ieee80211com *ic)
1079 struct ifnet *ifp = ic->ic_ifp;
1082 /* NB: this works because the structure is initialized to zero */
1083 if (!LIST_EMPTY(&ic->ic_media.ifm_list)) {
1085 * We are re-initializing the channel list; clear
1086 * the existing media state as the media routines
1087 * don't suppress duplicates.
1089 ifmedia_removeall(&ic->ic_media);
1091 ieee80211_chan_init(ic);
1094 * Recalculate media settings in case new channel list changes
1095 * the set of available modes.
1097 maxrate = ieee80211_media_setup(ic, &ic->ic_media, ic->ic_caps, 1,
1098 ieee80211com_media_change, ieee80211com_media_status);
1099 /* NB: strip explicit mode; we're actually in autoselect */
1100 ifmedia_set(&ic->ic_media,
1101 media_status(ic->ic_opmode, ic->ic_curchan) &~
1102 (IFM_MMASK | IFM_IEEE80211_TURBO));
1104 ifp->if_baudrate = IF_Mbps(maxrate);
1106 /* XXX need to propagate new media settings to vap's */
1109 /* XXX inline or eliminate? */
1110 const struct ieee80211_rateset *
1111 ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c)
1113 /* XXX does this work for 11ng basic rates? */
1114 return &ic->ic_sup_rates[ieee80211_chan2mode(c)];
1118 ieee80211_announce(struct ieee80211com *ic)
1120 struct ifnet *ifp = ic->ic_ifp;
1121 int i, mode, rate, mword;
1122 const struct ieee80211_rateset *rs;
1124 /* NB: skip AUTO since it has no rates */
1125 for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) {
1126 if (isclr(ic->ic_modecaps, mode))
1128 if_printf(ifp, "%s rates: ", ieee80211_phymode_name[mode]);
1129 rs = &ic->ic_sup_rates[mode];
1130 for (i = 0; i < rs->rs_nrates; i++) {
1131 mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode);
1134 rate = ieee80211_media2rate(mword);
1135 kprintf("%s%d%sMbps", (i != 0 ? " " : ""),
1136 rate / 2, ((rate & 0x1) != 0 ? ".5" : ""));
1140 ieee80211_ht_announce(ic);
1144 ieee80211_announce_channels(struct ieee80211com *ic)
1146 const struct ieee80211_channel *c;
1150 kprintf("Chan Freq CW RegPwr MinPwr MaxPwr\n");
1151 for (i = 0; i < ic->ic_nchans; i++) {
1152 c = &ic->ic_channels[i];
1153 if (IEEE80211_IS_CHAN_ST(c))
1155 else if (IEEE80211_IS_CHAN_108A(c))
1157 else if (IEEE80211_IS_CHAN_108G(c))
1159 else if (IEEE80211_IS_CHAN_HT(c))
1161 else if (IEEE80211_IS_CHAN_A(c))
1163 else if (IEEE80211_IS_CHAN_ANYG(c))
1165 else if (IEEE80211_IS_CHAN_B(c))
1169 if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c))
1171 else if (IEEE80211_IS_CHAN_HALF(c))
1173 else if (IEEE80211_IS_CHAN_QUARTER(c))
1177 kprintf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n"
1178 , c->ic_ieee, c->ic_freq, type
1180 , IEEE80211_IS_CHAN_HT40U(c) ? '+' :
1181 IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' '
1183 , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0
1184 , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0
1190 media2mode(const struct ifmedia_entry *ime, uint32_t flags, uint16_t *mode)
1192 switch (IFM_MODE(ime->ifm_media)) {
1193 case IFM_IEEE80211_11A:
1194 *mode = IEEE80211_MODE_11A;
1196 case IFM_IEEE80211_11B:
1197 *mode = IEEE80211_MODE_11B;
1199 case IFM_IEEE80211_11G:
1200 *mode = IEEE80211_MODE_11G;
1202 case IFM_IEEE80211_FH:
1203 *mode = IEEE80211_MODE_FH;
1205 case IFM_IEEE80211_11NA:
1206 *mode = IEEE80211_MODE_11NA;
1208 case IFM_IEEE80211_11NG:
1209 *mode = IEEE80211_MODE_11NG;
1212 *mode = IEEE80211_MODE_AUTO;
1218 * Turbo mode is an ``option''.
1219 * XXX does not apply to AUTO
1221 if (ime->ifm_media & IFM_IEEE80211_TURBO) {
1222 if (*mode == IEEE80211_MODE_11A) {
1223 if (flags & IEEE80211_F_TURBOP)
1224 *mode = IEEE80211_MODE_TURBO_A;
1226 *mode = IEEE80211_MODE_STURBO_A;
1227 } else if (*mode == IEEE80211_MODE_11G)
1228 *mode = IEEE80211_MODE_TURBO_G;
1237 * Handle a media change request on the underlying interface.
1240 ieee80211com_media_change(struct ifnet *ifp)
1246 * Handle a media change request on the vap interface.
1249 ieee80211_media_change(struct ifnet *ifp)
1251 struct ieee80211vap *vap = ifp->if_softc;
1252 struct ifmedia_entry *ime = vap->iv_media.ifm_cur;
1255 if (!media2mode(ime, vap->iv_flags, &newmode))
1257 if (vap->iv_des_mode != newmode) {
1258 vap->iv_des_mode = newmode;
1259 /* XXX kick state machine if up+running */
1265 * Common code to calculate the media status word
1266 * from the operating mode and channel state.
1269 media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan)
1273 status = IFM_IEEE80211;
1275 case IEEE80211_M_STA:
1277 case IEEE80211_M_IBSS:
1278 status |= IFM_IEEE80211_ADHOC;
1280 case IEEE80211_M_HOSTAP:
1281 status |= IFM_IEEE80211_HOSTAP;
1283 case IEEE80211_M_MONITOR:
1284 status |= IFM_IEEE80211_MONITOR;
1286 case IEEE80211_M_AHDEMO:
1287 status |= IFM_IEEE80211_ADHOC | IFM_FLAG0;
1289 case IEEE80211_M_WDS:
1290 status |= IFM_IEEE80211_WDS;
1292 case IEEE80211_M_MBSS:
1293 status |= IFM_IEEE80211_MBSS;
1296 if (IEEE80211_IS_CHAN_HTA(chan)) {
1297 status |= IFM_IEEE80211_11NA;
1298 } else if (IEEE80211_IS_CHAN_HTG(chan)) {
1299 status |= IFM_IEEE80211_11NG;
1300 } else if (IEEE80211_IS_CHAN_A(chan)) {
1301 status |= IFM_IEEE80211_11A;
1302 } else if (IEEE80211_IS_CHAN_B(chan)) {
1303 status |= IFM_IEEE80211_11B;
1304 } else if (IEEE80211_IS_CHAN_ANYG(chan)) {
1305 status |= IFM_IEEE80211_11G;
1306 } else if (IEEE80211_IS_CHAN_FHSS(chan)) {
1307 status |= IFM_IEEE80211_FH;
1309 /* XXX else complain? */
1311 if (IEEE80211_IS_CHAN_TURBO(chan))
1312 status |= IFM_IEEE80211_TURBO;
1314 if (IEEE80211_IS_CHAN_HT20(chan))
1315 status |= IFM_IEEE80211_HT20;
1316 if (IEEE80211_IS_CHAN_HT40(chan))
1317 status |= IFM_IEEE80211_HT40;
1323 ieee80211com_media_status(struct ifnet *ifp, struct ifmediareq *imr)
1325 struct ieee80211com *ic = ifp->if_l2com;
1326 struct ieee80211vap *vap;
1328 imr->ifm_status = IFM_AVALID;
1329 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
1330 if (vap->iv_ifp->if_flags & IFF_UP) {
1331 imr->ifm_status |= IFM_ACTIVE;
1334 imr->ifm_active = media_status(ic->ic_opmode, ic->ic_curchan);
1335 if (imr->ifm_status & IFM_ACTIVE)
1336 imr->ifm_current = imr->ifm_active;
1340 ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr)
1342 struct ieee80211vap *vap = ifp->if_softc;
1343 struct ieee80211com *ic = vap->iv_ic;
1344 enum ieee80211_phymode mode;
1346 imr->ifm_status = IFM_AVALID;
1348 * NB: use the current channel's mode to lock down a xmit
1349 * rate only when running; otherwise we may have a mismatch
1350 * in which case the rate will not be convertible.
1352 if (vap->iv_state == IEEE80211_S_RUN) {
1353 imr->ifm_status |= IFM_ACTIVE;
1354 mode = ieee80211_chan2mode(ic->ic_curchan);
1356 mode = IEEE80211_MODE_AUTO;
1357 imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan);
1359 * Calculate a current rate if possible.
1361 if (vap->iv_txparms[mode].ucastrate != IEEE80211_FIXED_RATE_NONE) {
1363 * A fixed rate is set, report that.
1365 imr->ifm_active |= ieee80211_rate2media(ic,
1366 vap->iv_txparms[mode].ucastrate, mode);
1367 } else if (vap->iv_opmode == IEEE80211_M_STA) {
1369 * In station mode report the current transmit rate.
1371 imr->ifm_active |= ieee80211_rate2media(ic,
1372 vap->iv_bss->ni_txrate, mode);
1374 imr->ifm_active |= IFM_AUTO;
1375 if (imr->ifm_status & IFM_ACTIVE)
1376 imr->ifm_current = imr->ifm_active;
1380 * Set the current phy mode and recalculate the active channel
1381 * set based on the available channels for this mode. Also
1382 * select a new default/current channel if the current one is
1383 * inappropriate for this mode.
1386 ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode)
1389 * Adjust basic rates in 11b/11g supported rate set.
1390 * Note that if operating on a hal/quarter rate channel
1391 * this is a noop as those rates sets are different
1394 if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B)
1395 ieee80211_setbasicrates(&ic->ic_sup_rates[mode], mode);
1397 ic->ic_curmode = mode;
1398 ieee80211_reset_erp(ic); /* reset ERP state */
1404 * Return the phy mode for with the specified channel.
1406 enum ieee80211_phymode
1407 ieee80211_chan2mode(const struct ieee80211_channel *chan)
1410 if (IEEE80211_IS_CHAN_HTA(chan))
1411 return IEEE80211_MODE_11NA;
1412 else if (IEEE80211_IS_CHAN_HTG(chan))
1413 return IEEE80211_MODE_11NG;
1414 else if (IEEE80211_IS_CHAN_108G(chan))
1415 return IEEE80211_MODE_TURBO_G;
1416 else if (IEEE80211_IS_CHAN_ST(chan))
1417 return IEEE80211_MODE_STURBO_A;
1418 else if (IEEE80211_IS_CHAN_TURBO(chan))
1419 return IEEE80211_MODE_TURBO_A;
1420 else if (IEEE80211_IS_CHAN_HALF(chan))
1421 return IEEE80211_MODE_HALF;
1422 else if (IEEE80211_IS_CHAN_QUARTER(chan))
1423 return IEEE80211_MODE_QUARTER;
1424 else if (IEEE80211_IS_CHAN_A(chan))
1425 return IEEE80211_MODE_11A;
1426 else if (IEEE80211_IS_CHAN_ANYG(chan))
1427 return IEEE80211_MODE_11G;
1428 else if (IEEE80211_IS_CHAN_B(chan))
1429 return IEEE80211_MODE_11B;
1430 else if (IEEE80211_IS_CHAN_FHSS(chan))
1431 return IEEE80211_MODE_FH;
1433 /* NB: should not get here */
1434 kprintf("%s: cannot map channel to mode; freq %u flags 0x%x\n",
1435 __func__, chan->ic_freq, chan->ic_flags);
1436 return IEEE80211_MODE_11B;
1440 u_int match; /* rate + mode */
1441 u_int media; /* if_media rate */
1445 findmedia(const struct ratemedia rates[], int n, u_int match)
1449 for (i = 0; i < n; i++)
1450 if (rates[i].match == match)
1451 return rates[i].media;
1456 * Convert IEEE80211 rate value to ifmedia subtype.
1457 * Rate is either a legacy rate in units of 0.5Mbps
1461 ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode)
1463 #define N(a) (sizeof(a) / sizeof(a[0]))
1464 static const struct ratemedia rates[] = {
1465 { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 },
1466 { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 },
1467 { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 },
1468 { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 },
1469 { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 },
1470 { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 },
1471 { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 },
1472 { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 },
1473 { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 },
1474 { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 },
1475 { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 },
1476 { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 },
1477 { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 },
1478 { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 },
1479 { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 },
1480 { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 },
1481 { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 },
1482 { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 },
1483 { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 },
1484 { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 },
1485 { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 },
1486 { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 },
1487 { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 },
1488 { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 },
1489 { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 },
1490 { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 },
1491 { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 },
1492 { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 },
1493 { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 },
1494 { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 },
1495 /* NB: OFDM72 doesn't realy exist so we don't handle it */
1497 static const struct ratemedia htrates[] = {
1498 { 0, IFM_IEEE80211_MCS },
1499 { 1, IFM_IEEE80211_MCS },
1500 { 2, IFM_IEEE80211_MCS },
1501 { 3, IFM_IEEE80211_MCS },
1502 { 4, IFM_IEEE80211_MCS },
1503 { 5, IFM_IEEE80211_MCS },
1504 { 6, IFM_IEEE80211_MCS },
1505 { 7, IFM_IEEE80211_MCS },
1506 { 8, IFM_IEEE80211_MCS },
1507 { 9, IFM_IEEE80211_MCS },
1508 { 10, IFM_IEEE80211_MCS },
1509 { 11, IFM_IEEE80211_MCS },
1510 { 12, IFM_IEEE80211_MCS },
1511 { 13, IFM_IEEE80211_MCS },
1512 { 14, IFM_IEEE80211_MCS },
1513 { 15, IFM_IEEE80211_MCS },
1518 * Check 11n rates first for match as an MCS.
1520 if (mode == IEEE80211_MODE_11NA) {
1521 if (rate & IEEE80211_RATE_MCS) {
1522 rate &= ~IEEE80211_RATE_MCS;
1523 m = findmedia(htrates, N(htrates), rate);
1525 return m | IFM_IEEE80211_11NA;
1527 } else if (mode == IEEE80211_MODE_11NG) {
1528 /* NB: 12 is ambiguous, it will be treated as an MCS */
1529 if (rate & IEEE80211_RATE_MCS) {
1530 rate &= ~IEEE80211_RATE_MCS;
1531 m = findmedia(htrates, N(htrates), rate);
1533 return m | IFM_IEEE80211_11NG;
1536 rate &= IEEE80211_RATE_VAL;
1538 case IEEE80211_MODE_11A:
1539 case IEEE80211_MODE_HALF: /* XXX good 'nuf */
1540 case IEEE80211_MODE_QUARTER:
1541 case IEEE80211_MODE_11NA:
1542 case IEEE80211_MODE_TURBO_A:
1543 case IEEE80211_MODE_STURBO_A:
1544 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11A);
1545 case IEEE80211_MODE_11B:
1546 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11B);
1547 case IEEE80211_MODE_FH:
1548 return findmedia(rates, N(rates), rate | IFM_IEEE80211_FH);
1549 case IEEE80211_MODE_AUTO:
1550 /* NB: ic may be NULL for some drivers */
1551 if (ic != NULL && ic->ic_phytype == IEEE80211_T_FH)
1552 return findmedia(rates, N(rates),
1553 rate | IFM_IEEE80211_FH);
1554 /* NB: hack, 11g matches both 11b+11a rates */
1556 case IEEE80211_MODE_11G:
1557 case IEEE80211_MODE_11NG:
1558 case IEEE80211_MODE_TURBO_G:
1559 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11G);
1566 ieee80211_media2rate(int mword)
1568 #define N(a) (sizeof(a) / sizeof(a[0]))
1569 static const int ieeerates[] = {
1573 2, /* IFM_IEEE80211_FH1 */
1574 4, /* IFM_IEEE80211_FH2 */
1575 2, /* IFM_IEEE80211_DS1 */
1576 4, /* IFM_IEEE80211_DS2 */
1577 11, /* IFM_IEEE80211_DS5 */
1578 22, /* IFM_IEEE80211_DS11 */
1579 44, /* IFM_IEEE80211_DS22 */
1580 12, /* IFM_IEEE80211_OFDM6 */
1581 18, /* IFM_IEEE80211_OFDM9 */
1582 24, /* IFM_IEEE80211_OFDM12 */
1583 36, /* IFM_IEEE80211_OFDM18 */
1584 48, /* IFM_IEEE80211_OFDM24 */
1585 72, /* IFM_IEEE80211_OFDM36 */
1586 96, /* IFM_IEEE80211_OFDM48 */
1587 108, /* IFM_IEEE80211_OFDM54 */
1588 144, /* IFM_IEEE80211_OFDM72 */
1589 0, /* IFM_IEEE80211_DS354k */
1590 0, /* IFM_IEEE80211_DS512k */
1591 6, /* IFM_IEEE80211_OFDM3 */
1592 9, /* IFM_IEEE80211_OFDM4 */
1593 54, /* IFM_IEEE80211_OFDM27 */
1594 -1, /* IFM_IEEE80211_MCS */
1596 return IFM_SUBTYPE(mword) < N(ieeerates) ?
1597 ieeerates[IFM_SUBTYPE(mword)] : 0;
1602 * The following hash function is adapted from "Hash Functions" by Bob Jenkins
1603 * ("Algorithm Alley", Dr. Dobbs Journal, September 1997).
1605 #define mix(a, b, c) \
1607 a -= b; a -= c; a ^= (c >> 13); \
1608 b -= c; b -= a; b ^= (a << 8); \
1609 c -= a; c -= b; c ^= (b >> 13); \
1610 a -= b; a -= c; a ^= (c >> 12); \
1611 b -= c; b -= a; b ^= (a << 16); \
1612 c -= a; c -= b; c ^= (b >> 5); \
1613 a -= b; a -= c; a ^= (c >> 3); \
1614 b -= c; b -= a; b ^= (a << 10); \
1615 c -= a; c -= b; c ^= (b >> 15); \
1616 } while (/*CONSTCOND*/0)
1619 ieee80211_mac_hash(const struct ieee80211com *ic,
1620 const uint8_t addr[IEEE80211_ADDR_LEN])
1622 uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = ic->ic_hash_key;