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_var.h>
43 #include <net/if_dl.h>
44 #include <net/if_media.h>
45 #include <net/if_types.h>
46 #include <net/ethernet.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>
53 #include <netproto/802_11/ieee80211_ratectl.h>
57 #define IEEE80211_NMBCLUSTERS_DEFMIN 32
58 #define IEEE80211_NMBCLUSTERS_DEFAULT 128
60 static int ieee80211_nmbclusters_default = IEEE80211_NMBCLUSTERS_DEFAULT;
61 TUNABLE_INT("net.link.ieee80211.nmbclusters", &ieee80211_nmbclusters_default);
63 const char *ieee80211_phymode_name[IEEE80211_MODE_MAX] = {
64 [IEEE80211_MODE_AUTO] = "auto",
65 [IEEE80211_MODE_11A] = "11a",
66 [IEEE80211_MODE_11B] = "11b",
67 [IEEE80211_MODE_11G] = "11g",
68 [IEEE80211_MODE_FH] = "FH",
69 [IEEE80211_MODE_TURBO_A] = "turboA",
70 [IEEE80211_MODE_TURBO_G] = "turboG",
71 [IEEE80211_MODE_STURBO_A] = "sturboA",
72 [IEEE80211_MODE_HALF] = "half",
73 [IEEE80211_MODE_QUARTER] = "quarter",
74 [IEEE80211_MODE_11NA] = "11na",
75 [IEEE80211_MODE_11NG] = "11ng",
77 /* map ieee80211_opmode to the corresponding capability bit */
78 const int ieee80211_opcap[IEEE80211_OPMODE_MAX] = {
79 [IEEE80211_M_IBSS] = IEEE80211_C_IBSS,
80 [IEEE80211_M_WDS] = IEEE80211_C_WDS,
81 [IEEE80211_M_STA] = IEEE80211_C_STA,
82 [IEEE80211_M_AHDEMO] = IEEE80211_C_AHDEMO,
83 [IEEE80211_M_HOSTAP] = IEEE80211_C_HOSTAP,
84 [IEEE80211_M_MONITOR] = IEEE80211_C_MONITOR,
85 #ifdef IEEE80211_SUPPORT_MESH
86 [IEEE80211_M_MBSS] = IEEE80211_C_MBSS,
90 const uint8_t ieee80211broadcastaddr[IEEE80211_ADDR_LEN] =
91 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
93 static void ieee80211_syncflag_locked(struct ieee80211com *ic, int flag);
94 static void ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag);
95 static void ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag);
96 static int ieee80211_media_setup(struct ieee80211com *ic,
97 struct ifmedia *media, int caps, int addsta,
98 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat);
99 static void ieee80211com_media_status(struct ifnet *, struct ifmediareq *);
100 static int ieee80211com_media_change(struct ifnet *);
101 static int media_status(enum ieee80211_opmode,
102 const struct ieee80211_channel *);
104 MALLOC_DEFINE(M_80211_VAP, "80211vap", "802.11 vap state");
107 * Default supported rates for 802.11 operation (in IEEE .5Mb units).
109 #define B(r) ((r) | IEEE80211_RATE_BASIC)
110 static const struct ieee80211_rateset ieee80211_rateset_11a =
111 { 8, { B(12), 18, B(24), 36, B(48), 72, 96, 108 } };
112 static const struct ieee80211_rateset ieee80211_rateset_half =
113 { 8, { B(6), 9, B(12), 18, B(24), 36, 48, 54 } };
114 static const struct ieee80211_rateset ieee80211_rateset_quarter =
115 { 8, { B(3), 4, B(6), 9, B(12), 18, 24, 27 } };
116 static const struct ieee80211_rateset ieee80211_rateset_11b =
117 { 4, { B(2), B(4), B(11), B(22) } };
118 /* NB: OFDM rates are handled specially based on mode */
119 static const struct ieee80211_rateset ieee80211_rateset_11g =
120 { 12, { B(2), B(4), B(11), B(22), 12, 18, 24, 36, 48, 72, 96, 108 } };
124 * Fill in 802.11 available channel set, mark
125 * all available channels as active, and pick
126 * a default channel if not already specified.
129 ieee80211_chan_init(struct ieee80211com *ic)
131 #define DEFAULTRATES(m, def) do { \
132 if (ic->ic_sup_rates[m].rs_nrates == 0) \
133 ic->ic_sup_rates[m] = def; \
135 struct ieee80211_channel *c;
138 KASSERT(0 < ic->ic_nchans && ic->ic_nchans <= IEEE80211_CHAN_MAX,
139 ("invalid number of channels specified: %u", ic->ic_nchans));
140 memset(ic->ic_chan_avail, 0, sizeof(ic->ic_chan_avail));
141 memset(ic->ic_modecaps, 0, sizeof(ic->ic_modecaps));
142 setbit(ic->ic_modecaps, IEEE80211_MODE_AUTO);
143 for (i = 0; i < ic->ic_nchans; i++) {
144 c = &ic->ic_channels[i];
145 KASSERT(c->ic_flags != 0, ("channel with no flags"));
147 * Help drivers that work only with frequencies by filling
148 * in IEEE channel #'s if not already calculated. Note this
149 * mimics similar work done in ieee80211_setregdomain when
150 * changing regulatory state.
153 c->ic_ieee = ieee80211_mhz2ieee(c->ic_freq,c->ic_flags);
154 if (IEEE80211_IS_CHAN_HT40(c) && c->ic_extieee == 0)
155 c->ic_extieee = ieee80211_mhz2ieee(c->ic_freq +
156 (IEEE80211_IS_CHAN_HT40U(c) ? 20 : -20),
158 /* default max tx power to max regulatory */
159 if (c->ic_maxpower == 0)
160 c->ic_maxpower = 2*c->ic_maxregpower;
161 setbit(ic->ic_chan_avail, c->ic_ieee);
163 * Identify mode capabilities.
165 if (IEEE80211_IS_CHAN_A(c))
166 setbit(ic->ic_modecaps, IEEE80211_MODE_11A);
167 if (IEEE80211_IS_CHAN_B(c))
168 setbit(ic->ic_modecaps, IEEE80211_MODE_11B);
169 if (IEEE80211_IS_CHAN_ANYG(c))
170 setbit(ic->ic_modecaps, IEEE80211_MODE_11G);
171 if (IEEE80211_IS_CHAN_FHSS(c))
172 setbit(ic->ic_modecaps, IEEE80211_MODE_FH);
173 if (IEEE80211_IS_CHAN_108A(c))
174 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_A);
175 if (IEEE80211_IS_CHAN_108G(c))
176 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_G);
177 if (IEEE80211_IS_CHAN_ST(c))
178 setbit(ic->ic_modecaps, IEEE80211_MODE_STURBO_A);
179 if (IEEE80211_IS_CHAN_HALF(c))
180 setbit(ic->ic_modecaps, IEEE80211_MODE_HALF);
181 if (IEEE80211_IS_CHAN_QUARTER(c))
182 setbit(ic->ic_modecaps, IEEE80211_MODE_QUARTER);
183 if (IEEE80211_IS_CHAN_HTA(c))
184 setbit(ic->ic_modecaps, IEEE80211_MODE_11NA);
185 if (IEEE80211_IS_CHAN_HTG(c))
186 setbit(ic->ic_modecaps, IEEE80211_MODE_11NG);
188 /* initialize candidate channels to all available */
189 memcpy(ic->ic_chan_active, ic->ic_chan_avail,
190 sizeof(ic->ic_chan_avail));
192 /* sort channel table to allow lookup optimizations */
193 ieee80211_sort_channels(ic->ic_channels, ic->ic_nchans);
195 /* invalidate any previous state */
196 ic->ic_bsschan = IEEE80211_CHAN_ANYC;
197 ic->ic_prevchan = NULL;
198 ic->ic_csa_newchan = NULL;
199 /* arbitrarily pick the first channel */
200 ic->ic_curchan = &ic->ic_channels[0];
201 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
203 /* fillin well-known rate sets if driver has not specified */
204 DEFAULTRATES(IEEE80211_MODE_11B, ieee80211_rateset_11b);
205 DEFAULTRATES(IEEE80211_MODE_11G, ieee80211_rateset_11g);
206 DEFAULTRATES(IEEE80211_MODE_11A, ieee80211_rateset_11a);
207 DEFAULTRATES(IEEE80211_MODE_TURBO_A, ieee80211_rateset_11a);
208 DEFAULTRATES(IEEE80211_MODE_TURBO_G, ieee80211_rateset_11g);
209 DEFAULTRATES(IEEE80211_MODE_STURBO_A, ieee80211_rateset_11a);
210 DEFAULTRATES(IEEE80211_MODE_HALF, ieee80211_rateset_half);
211 DEFAULTRATES(IEEE80211_MODE_QUARTER, ieee80211_rateset_quarter);
212 DEFAULTRATES(IEEE80211_MODE_11NA, ieee80211_rateset_11a);
213 DEFAULTRATES(IEEE80211_MODE_11NG, ieee80211_rateset_11g);
216 * Setup required information to fill the mcsset field, if driver did
217 * not. Assume a 2T2R setup for historic reasons.
219 if (ic->ic_rxstream == 0)
221 if (ic->ic_txstream == 0)
225 * Set auto mode to reset active channel state and any desired channel.
227 (void) ieee80211_setmode(ic, IEEE80211_MODE_AUTO);
232 null_update_mcast(struct ifnet *ifp)
234 if_printf(ifp, "need multicast update callback\n");
238 null_update_promisc(struct ifnet *ifp)
240 if_printf(ifp, "need promiscuous mode update callback\n");
244 null_transmit(struct ifnet *ifp, struct mbuf *m)
247 IFNET_STAT_INC(ifp, oerrors, 1);
248 return EACCES; /* XXX EIO/EPERM? */
251 #if defined(__DragonFly__)
253 null_output(struct ifnet *ifp, struct mbuf *m,
254 struct sockaddr *dst, struct rtentry *ro)
257 null_output(struct ifnet *ifp, struct mbuf *m,
258 const struct sockaddr *dst, struct route *ro)
261 if_printf(ifp, "discard raw packet\n");
262 return null_transmit(ifp, m);
265 #if defined(__DragonFly__)
268 null_input(struct ifnet *ifp, struct mbuf *m,
269 const struct pktinfo *pi, int cpuid)
271 if_printf(ifp, "if_input should not be called\n");
278 null_input(struct ifnet *ifp, struct mbuf *m)
280 if_printf(ifp, "if_input should not be called\n");
287 null_update_chw(struct ieee80211com *ic)
290 if_printf(ic->ic_ifp, "%s: need callback\n", __func__);
294 * Attach/setup the common net80211 state. Called by
295 * the driver on attach to prior to creating any vap's.
298 ieee80211_ifattach(struct ieee80211com *ic,
299 const uint8_t macaddr[IEEE80211_ADDR_LEN])
301 struct ifnet *ifp = ic->ic_ifp;
302 struct sockaddr_dl *sdl;
305 KASSERT(ifp->if_type == IFT_IEEE80211, ("if_type %d", ifp->if_type));
307 IEEE80211_LOCK_INIT(ic, ifp->if_xname);
308 IEEE80211_TX_LOCK_INIT(ic, ifp->if_xname);
309 TAILQ_INIT(&ic->ic_vaps);
311 /* Create a taskqueue for all state changes */
312 ic->ic_tq = taskqueue_create("ic_taskq", M_WAITOK | M_ZERO,
313 taskqueue_thread_enqueue, &ic->ic_tq);
314 #if defined(__DragonFly__)
315 taskqueue_start_threads(&ic->ic_tq, 1, TDPRI_KERN_DAEMON, -1,
316 "%s net80211 taskq", ifp->if_xname);
318 taskqueue_start_threads(&ic->ic_tq, 1, PI_NET, "%s net80211 taskq",
322 * Fill in 802.11 available channel set, mark all
323 * available channels as active, and pick a default
324 * channel if not already specified.
326 ieee80211_media_init(ic);
328 ic->ic_update_mcast = null_update_mcast;
329 ic->ic_update_promisc = null_update_promisc;
330 ic->ic_update_chw = null_update_chw;
332 ic->ic_hash_key = arc4random();
333 ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT;
334 ic->ic_lintval = ic->ic_bintval;
335 ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX;
337 ieee80211_crypto_attach(ic);
338 ieee80211_node_attach(ic);
339 ieee80211_power_attach(ic);
340 ieee80211_proto_attach(ic);
341 #ifdef IEEE80211_SUPPORT_SUPERG
342 ieee80211_superg_attach(ic);
344 ieee80211_ht_attach(ic);
345 ieee80211_scan_attach(ic);
346 ieee80211_regdomain_attach(ic);
347 ieee80211_dfs_attach(ic);
349 ieee80211_sysctl_attach(ic);
351 ifp->if_addrlen = IEEE80211_ADDR_LEN;
355 * If driver does not configure # of mbuf clusters/jclusters
356 * that could sit on the device queues for quite some time,
358 * - The device queues only consume mbuf clusters.
359 * - No more than ieee80211_nmbclusters_default (by default
360 * 128) mbuf clusters will sit on the device queues for
363 if (ifp->if_nmbclusters <= 0 && ifp->if_nmbjclusters <= 0) {
364 if (ieee80211_nmbclusters_default <
365 IEEE80211_NMBCLUSTERS_DEFMIN) {
366 kprintf("ieee80211 nmbclusters %d -> %d\n",
367 ieee80211_nmbclusters_default,
368 IEEE80211_NMBCLUSTERS_DEFAULT);
369 ieee80211_nmbclusters_default =
370 IEEE80211_NMBCLUSTERS_DEFAULT;
372 ifp->if_nmbclusters = ieee80211_nmbclusters_default;
378 * This function must _not_ be serialized by the WLAN serializer,
379 * since it could dead-lock the domsg to netisrs in if_attach().
381 wlan_serialize_exit();
382 #if defined(__DragonFly__)
383 if_attach(ifp, &wlan_global_serializer);
387 wlan_serialize_enter();
389 ifp->if_mtu = IEEE80211_MTU_MAX;
390 ifp->if_broadcastaddr = ieee80211broadcastaddr;
391 ifp->if_output = null_output;
392 ifp->if_input = null_input; /* just in case */
393 ifp->if_resolvemulti = NULL; /* NB: callers check */
395 ifa = TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa;
396 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
397 sdl->sdl_type = IFT_ETHER; /* XXX IFT_IEEE80211? */
398 sdl->sdl_alen = IEEE80211_ADDR_LEN;
399 IEEE80211_ADDR_COPY(LLADDR(sdl), macaddr);
405 * Detach net80211 state on device detach. Tear down
406 * all vap's and reclaim all common state prior to the
407 * device state going away. Note we may call back into
408 * driver; it must be prepared for this.
411 ieee80211_ifdetach(struct ieee80211com *ic)
413 struct ifnet *ifp = ic->ic_ifp;
414 struct ieee80211vap *vap;
417 * The VAP is responsible for setting and clearing
418 * the VIMAGE context.
420 while ((vap = TAILQ_FIRST(&ic->ic_vaps)) != NULL)
421 ieee80211_vap_destroy(vap);
424 * WLAN serializer must _not_ be held for if_detach(),
425 * since it could dead-lock the domsg to netisrs.
428 * This function actually should _not_ be serialized
429 * by the WLAN serializer, however, all 802.11 device
430 * drivers serialize it ...
432 wlan_serialize_exit();
435 * This detaches the main interface, but not the vaps.
436 * Each VAP may be in a separate VIMAGE.
438 * Detach the main interface _after_ all vaps are
439 * destroyed, since the main interface is referenced
440 * on vaps' detach path.
442 CURVNET_SET(ifp->if_vnet);
446 /* Re-hold WLAN serializer */
447 wlan_serialize_enter();
449 ieee80211_waitfor_parent(ic);
451 ieee80211_sysctl_detach(ic);
452 ieee80211_dfs_detach(ic);
453 ieee80211_regdomain_detach(ic);
454 ieee80211_scan_detach(ic);
455 #ifdef IEEE80211_SUPPORT_SUPERG
456 ieee80211_superg_detach(ic);
458 ieee80211_ht_detach(ic);
459 /* NB: must be called before ieee80211_node_detach */
460 ieee80211_proto_detach(ic);
461 ieee80211_crypto_detach(ic);
462 ieee80211_power_detach(ic);
463 ieee80211_node_detach(ic);
465 /* XXX VNET needed? */
466 ifmedia_removeall(&ic->ic_media);
468 taskqueue_free(ic->ic_tq);
469 IEEE80211_TX_LOCK_DESTROY(ic);
470 IEEE80211_LOCK_DESTROY(ic);
474 * Default reset method for use with the ioctl support. This
475 * method is invoked after any state change in the 802.11
476 * layer that should be propagated to the hardware but not
477 * require re-initialization of the 802.11 state machine (e.g
478 * rescanning for an ap). We always return ENETRESET which
479 * should cause the driver to re-initialize the device. Drivers
480 * can override this method to implement more optimized support.
483 default_reset(struct ieee80211vap *vap, u_long cmd)
489 * Prepare a vap for use. Drivers use this call to
490 * setup net80211 state in new vap's prior attaching
491 * them with ieee80211_vap_attach (below).
494 ieee80211_vap_setup(struct ieee80211com *ic, struct ieee80211vap *vap,
495 const char name[IFNAMSIZ], int unit, enum ieee80211_opmode opmode,
496 int flags, const uint8_t bssid[IEEE80211_ADDR_LEN],
497 const uint8_t macaddr[IEEE80211_ADDR_LEN])
501 ifp = if_alloc(IFT_ETHER);
503 if_printf(ic->ic_ifp, "%s: unable to allocate ifnet\n",
507 if_initname(ifp, name, unit);
508 ifp->if_softc = vap; /* back pointer */
509 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST;
510 ifp->if_start = ieee80211_vap_start;
512 ifp->if_transmit = ieee80211_vap_transmit;
513 ifp->if_qflush = ieee80211_vap_qflush;
515 ifp->if_ioctl = ieee80211_ioctl;
516 ifp->if_init = ieee80211_init;
520 vap->iv_flags = ic->ic_flags; /* propagate common flags */
521 vap->iv_flags_ext = ic->ic_flags_ext;
522 vap->iv_flags_ven = ic->ic_flags_ven;
523 vap->iv_caps = ic->ic_caps &~ IEEE80211_C_OPMODE;
524 vap->iv_htcaps = ic->ic_htcaps;
525 vap->iv_htextcaps = ic->ic_htextcaps;
526 vap->iv_opmode = opmode;
527 vap->iv_caps |= ieee80211_opcap[opmode];
529 case IEEE80211_M_WDS:
531 * WDS links must specify the bssid of the far end.
532 * For legacy operation this is a static relationship.
533 * For non-legacy operation the station must associate
534 * and be authorized to pass traffic. Plumbing the
535 * vap to the proper node happens when the vap
536 * transitions to RUN state.
538 IEEE80211_ADDR_COPY(vap->iv_des_bssid, bssid);
539 vap->iv_flags |= IEEE80211_F_DESBSSID;
540 if (flags & IEEE80211_CLONE_WDSLEGACY)
541 vap->iv_flags_ext |= IEEE80211_FEXT_WDSLEGACY;
543 #ifdef IEEE80211_SUPPORT_TDMA
544 case IEEE80211_M_AHDEMO:
545 if (flags & IEEE80211_CLONE_TDMA) {
546 /* NB: checked before clone operation allowed */
547 KASSERT(ic->ic_caps & IEEE80211_C_TDMA,
548 ("not TDMA capable, ic_caps 0x%x", ic->ic_caps));
550 * Propagate TDMA capability to mark vap; this
551 * cannot be removed and is used to distinguish
552 * regular ahdemo operation from ahdemo+tdma.
554 vap->iv_caps |= IEEE80211_C_TDMA;
561 /* auto-enable s/w beacon miss support */
562 if (flags & IEEE80211_CLONE_NOBEACONS)
563 vap->iv_flags_ext |= IEEE80211_FEXT_SWBMISS;
564 /* auto-generated or user supplied MAC address */
565 if (flags & (IEEE80211_CLONE_BSSID|IEEE80211_CLONE_MACADDR))
566 vap->iv_flags_ext |= IEEE80211_FEXT_UNIQMAC;
568 * Enable various functionality by default if we're
569 * capable; the driver can override us if it knows better.
571 if (vap->iv_caps & IEEE80211_C_WME)
572 vap->iv_flags |= IEEE80211_F_WME;
573 if (vap->iv_caps & IEEE80211_C_BURST)
574 vap->iv_flags |= IEEE80211_F_BURST;
575 /* NB: bg scanning only makes sense for station mode right now */
578 * DISABLE BGSCAN BY DEFAULT, many issues can crop up including
579 * the link going dead.
581 if (vap->iv_opmode == IEEE80211_M_STA &&
582 (vap->iv_caps & IEEE80211_C_BGSCAN))
583 vap->iv_flags |= IEEE80211_F_BGSCAN;
585 vap->iv_flags |= IEEE80211_F_DOTH; /* XXX no cap, just ena */
586 /* NB: DFS support only makes sense for ap mode right now */
587 if (vap->iv_opmode == IEEE80211_M_HOSTAP &&
588 (vap->iv_caps & IEEE80211_C_DFS))
589 vap->iv_flags_ext |= IEEE80211_FEXT_DFS;
591 vap->iv_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */
592 vap->iv_bmissthreshold = IEEE80211_HWBMISS_DEFAULT;
593 vap->iv_dtim_period = IEEE80211_DTIM_DEFAULT;
595 * Install a default reset method for the ioctl support;
596 * the driver can override this.
598 vap->iv_reset = default_reset;
600 IEEE80211_ADDR_COPY(vap->iv_myaddr, macaddr);
602 ieee80211_sysctl_vattach(vap);
603 ieee80211_crypto_vattach(vap);
604 ieee80211_node_vattach(vap);
605 ieee80211_power_vattach(vap);
606 ieee80211_proto_vattach(vap);
607 #ifdef IEEE80211_SUPPORT_SUPERG
608 ieee80211_superg_vattach(vap);
610 ieee80211_ht_vattach(vap);
611 ieee80211_scan_vattach(vap);
612 ieee80211_regdomain_vattach(vap);
613 ieee80211_radiotap_vattach(vap);
614 ieee80211_ratectl_set(vap, IEEE80211_RATECTL_NONE);
620 * Activate a vap. State should have been prepared with a
621 * call to ieee80211_vap_setup and by the driver. On return
622 * from this call the vap is ready for use.
625 ieee80211_vap_attach(struct ieee80211vap *vap,
626 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat)
628 struct ifnet *ifp = vap->iv_ifp;
629 struct ieee80211com *ic = vap->iv_ic;
630 struct ifmediareq imr;
634 * This function must _not_ be serialized by the WLAN serializer,
635 * since it could dead-lock the domsg to netisrs in ether_ifattach().
637 wlan_assert_notserialized();
639 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
640 "%s: %s parent %s flags 0x%x flags_ext 0x%x\n",
641 __func__, ieee80211_opmode_name[vap->iv_opmode],
642 ic->ic_ifp->if_xname, vap->iv_flags, vap->iv_flags_ext);
645 * Do late attach work that cannot happen until after
646 * the driver has had a chance to override defaults.
648 ieee80211_node_latevattach(vap);
649 ieee80211_power_latevattach(vap);
651 maxrate = ieee80211_media_setup(ic, &vap->iv_media, vap->iv_caps,
652 vap->iv_opmode == IEEE80211_M_STA, media_change, media_stat);
653 ieee80211_media_status(ifp, &imr);
654 /* NB: strip explicit mode; we're actually in autoselect */
655 ifmedia_set(&vap->iv_media,
656 imr.ifm_active &~ (IFM_MMASK | IFM_IEEE80211_TURBO));
658 ifp->if_baudrate = IF_Mbps(maxrate);
660 #if defined(__DragonFly__)
661 ether_ifattach(ifp, vap->iv_myaddr, &wlan_global_serializer);
663 ether_ifattach(ifp, vap->iv_myaddr);
665 /* hook output method setup by ether_ifattach */
666 vap->iv_output = ifp->if_output;
667 ifp->if_output = ieee80211_output;
668 /* NB: if_mtu set by ether_ifattach to ETHERMTU */
671 TAILQ_INSERT_TAIL(&ic->ic_vaps, vap, iv_next);
672 ieee80211_syncflag_locked(ic, IEEE80211_F_WME);
673 #ifdef IEEE80211_SUPPORT_SUPERG
674 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP);
676 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF);
677 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST);
678 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT);
679 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40);
680 ieee80211_syncifflag_locked(ic, IFF_PROMISC);
681 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI);
682 IEEE80211_UNLOCK(ic);
688 * Tear down vap state and reclaim the ifnet.
689 * The driver is assumed to have prepared for
690 * this; e.g. by turning off interrupts for the
694 ieee80211_vap_detach(struct ieee80211vap *vap)
696 struct ieee80211com *ic = vap->iv_ic;
697 struct ifnet *ifp = vap->iv_ifp;
700 * This function must _not_ be serialized by the WLAN serializer,
701 * since it could dead-lock the domsg to netisrs in ether_ifdettach().
703 wlan_assert_notserialized();
705 CURVNET_SET(ifp->if_vnet);
707 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s parent %s\n",
708 __func__, ieee80211_opmode_name[vap->iv_opmode],
709 ic->ic_ifp->if_xname);
711 /* NB: bpfdetach is called by ether_ifdetach and claims all taps */
717 * Flush any deferred vap tasks.
719 ieee80211_draintask(ic, &vap->iv_nstate_task);
720 ieee80211_draintask(ic, &vap->iv_swbmiss_task);
722 #if !defined(__DragonFly__)
723 /* XXX band-aid until ifnet handles this for us */
724 taskqueue_drain(taskqueue_swi, &ifp->if_linktask);
728 KASSERT(vap->iv_state == IEEE80211_S_INIT , ("vap still running"));
729 TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next);
730 ieee80211_syncflag_locked(ic, IEEE80211_F_WME);
731 #ifdef IEEE80211_SUPPORT_SUPERG
732 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP);
734 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF);
735 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST);
736 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT);
737 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40);
738 /* NB: this handles the bpfdetach done below */
739 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_BPF);
740 ieee80211_syncifflag_locked(ic, IFF_PROMISC);
741 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI);
742 IEEE80211_UNLOCK(ic);
744 ifmedia_removeall(&vap->iv_media);
746 ieee80211_radiotap_vdetach(vap);
747 ieee80211_regdomain_vdetach(vap);
748 ieee80211_scan_vdetach(vap);
749 #ifdef IEEE80211_SUPPORT_SUPERG
750 ieee80211_superg_vdetach(vap);
752 ieee80211_ht_vdetach(vap);
753 /* NB: must be before ieee80211_node_vdetach */
754 ieee80211_proto_vdetach(vap);
755 ieee80211_crypto_vdetach(vap);
756 ieee80211_power_vdetach(vap);
757 ieee80211_node_vdetach(vap);
758 ieee80211_sysctl_vdetach(vap);
766 * Synchronize flag bit state in the parent ifnet structure
767 * according to the state of all vap ifnet's. This is used,
768 * for example, to handle IFF_PROMISC and IFF_ALLMULTI.
771 ieee80211_syncifflag_locked(struct ieee80211com *ic, int flag)
773 struct ifnet *ifp = ic->ic_ifp;
774 struct ieee80211vap *vap;
777 IEEE80211_LOCK_ASSERT(ic);
780 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
781 if (vap->iv_ifp->if_flags & flag) {
783 * XXX the bridge sets PROMISC but we don't want to
784 * enable it on the device, discard here so all the
785 * drivers don't need to special-case it
787 if (flag == IFF_PROMISC &&
788 !(vap->iv_opmode == IEEE80211_M_MONITOR ||
789 (vap->iv_opmode == IEEE80211_M_AHDEMO &&
790 (vap->iv_caps & IEEE80211_C_TDMA) == 0)))
795 oflags = ifp->if_flags;
797 ifp->if_flags |= flag;
799 ifp->if_flags &= ~flag;
800 if ((ifp->if_flags ^ oflags) & flag) {
801 /* XXX should we return 1/0 and let caller do this? */
802 if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
803 if (flag == IFF_PROMISC)
804 ieee80211_runtask(ic, &ic->ic_promisc_task);
805 else if (flag == IFF_ALLMULTI)
806 ieee80211_runtask(ic, &ic->ic_mcast_task);
812 * Synchronize flag bit state in the com structure
813 * according to the state of all vap's. This is used,
814 * for example, to handle state changes via ioctls.
817 ieee80211_syncflag_locked(struct ieee80211com *ic, int flag)
819 struct ieee80211vap *vap;
822 IEEE80211_LOCK_ASSERT(ic);
825 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
826 if (vap->iv_flags & flag) {
831 ic->ic_flags |= flag;
833 ic->ic_flags &= ~flag;
837 ieee80211_syncflag(struct ieee80211vap *vap, int flag)
839 struct ieee80211com *ic = vap->iv_ic;
844 vap->iv_flags &= ~flag;
846 vap->iv_flags |= flag;
847 ieee80211_syncflag_locked(ic, flag);
848 IEEE80211_UNLOCK(ic);
852 * Synchronize flags_ht bit state in the com structure
853 * according to the state of all vap's. This is used,
854 * for example, to handle state changes via ioctls.
857 ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag)
859 struct ieee80211vap *vap;
862 IEEE80211_LOCK_ASSERT(ic);
865 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
866 if (vap->iv_flags_ht & flag) {
871 ic->ic_flags_ht |= flag;
873 ic->ic_flags_ht &= ~flag;
877 ieee80211_syncflag_ht(struct ieee80211vap *vap, int flag)
879 struct ieee80211com *ic = vap->iv_ic;
884 vap->iv_flags_ht &= ~flag;
886 vap->iv_flags_ht |= flag;
887 ieee80211_syncflag_ht_locked(ic, flag);
888 IEEE80211_UNLOCK(ic);
892 * Synchronize flags_ext bit state in the com structure
893 * according to the state of all vap's. This is used,
894 * for example, to handle state changes via ioctls.
897 ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag)
899 struct ieee80211vap *vap;
902 IEEE80211_LOCK_ASSERT(ic);
905 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
906 if (vap->iv_flags_ext & flag) {
911 ic->ic_flags_ext |= flag;
913 ic->ic_flags_ext &= ~flag;
917 ieee80211_syncflag_ext(struct ieee80211vap *vap, int flag)
919 struct ieee80211com *ic = vap->iv_ic;
924 vap->iv_flags_ext &= ~flag;
926 vap->iv_flags_ext |= flag;
927 ieee80211_syncflag_ext_locked(ic, flag);
928 IEEE80211_UNLOCK(ic);
932 mapgsm(u_int freq, u_int flags)
935 if (flags & IEEE80211_CHAN_QUARTER)
937 else if (flags & IEEE80211_CHAN_HALF)
941 /* NB: there is no 907/20 wide but leave room */
942 return (freq - 906*10) / 5;
946 mappsb(u_int freq, u_int flags)
948 return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5;
952 * Convert MHz frequency to IEEE channel number.
955 ieee80211_mhz2ieee(u_int freq, u_int flags)
957 #define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990)
958 if (flags & IEEE80211_CHAN_GSM)
959 return mapgsm(freq, flags);
960 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
964 return ((int) freq - 2407) / 5;
966 return 15 + ((freq - 2512) / 20);
967 } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */
969 /* XXX check regdomain? */
970 if (IS_FREQ_IN_PSB(freq))
971 return mappsb(freq, flags);
972 return (freq - 4000) / 5;
974 return (freq - 5000) / 5;
975 } else { /* either, guess */
979 if (907 <= freq && freq <= 922)
980 return mapgsm(freq, flags);
981 return ((int) freq - 2407) / 5;
984 if (IS_FREQ_IN_PSB(freq))
985 return mappsb(freq, flags);
986 else if (freq > 4900)
987 return (freq - 4000) / 5;
989 return 15 + ((freq - 2512) / 20);
991 return (freq - 5000) / 5;
993 #undef IS_FREQ_IN_PSB
997 * Convert channel to IEEE channel number.
1000 ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c)
1003 if_printf(ic->ic_ifp, "invalid channel (NULL)\n");
1006 return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee);
1010 * Convert IEEE channel number to MHz frequency.
1013 ieee80211_ieee2mhz(u_int chan, u_int flags)
1015 if (flags & IEEE80211_CHAN_GSM)
1016 return 907 + 5 * (chan / 10);
1017 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
1021 return 2407 + chan*5;
1023 return 2512 + ((chan-15)*20);
1024 } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */
1025 if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) {
1027 return 4940 + chan*5 + (chan % 5 ? 2 : 0);
1029 return 5000 + (chan*5);
1030 } else { /* either, guess */
1031 /* XXX can't distinguish PSB+GSM channels */
1034 if (chan < 14) /* 0-13 */
1035 return 2407 + chan*5;
1036 if (chan < 27) /* 15-26 */
1037 return 2512 + ((chan-15)*20);
1038 return 5000 + (chan*5);
1043 * Locate a channel given a frequency+flags. We cache
1044 * the previous lookup to optimize switching between two
1045 * channels--as happens with dynamic turbo.
1047 struct ieee80211_channel *
1048 ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags)
1050 struct ieee80211_channel *c;
1053 flags &= IEEE80211_CHAN_ALLTURBO;
1054 c = ic->ic_prevchan;
1055 if (c != NULL && c->ic_freq == freq &&
1056 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
1058 /* brute force search */
1059 for (i = 0; i < ic->ic_nchans; i++) {
1060 c = &ic->ic_channels[i];
1061 if (c->ic_freq == freq &&
1062 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
1069 * Locate a channel given a channel number+flags. We cache
1070 * the previous lookup to optimize switching between two
1071 * channels--as happens with dynamic turbo.
1073 struct ieee80211_channel *
1074 ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags)
1076 struct ieee80211_channel *c;
1079 flags &= IEEE80211_CHAN_ALLTURBO;
1080 c = ic->ic_prevchan;
1081 if (c != NULL && c->ic_ieee == ieee &&
1082 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
1084 /* brute force search */
1085 for (i = 0; i < ic->ic_nchans; i++) {
1086 c = &ic->ic_channels[i];
1087 if (c->ic_ieee == ieee &&
1088 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
1095 addmedia(struct ifmedia *media, int caps, int addsta, int mode, int mword)
1097 #define ADD(_ic, _s, _o) \
1098 ifmedia_add(media, \
1099 IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL)
1100 static const u_int mopts[IEEE80211_MODE_MAX] = {
1101 [IEEE80211_MODE_AUTO] = IFM_AUTO,
1102 [IEEE80211_MODE_11A] = IFM_IEEE80211_11A,
1103 [IEEE80211_MODE_11B] = IFM_IEEE80211_11B,
1104 [IEEE80211_MODE_11G] = IFM_IEEE80211_11G,
1105 [IEEE80211_MODE_FH] = IFM_IEEE80211_FH,
1106 [IEEE80211_MODE_TURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO,
1107 [IEEE80211_MODE_TURBO_G] = IFM_IEEE80211_11G|IFM_IEEE80211_TURBO,
1108 [IEEE80211_MODE_STURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO,
1109 [IEEE80211_MODE_HALF] = IFM_IEEE80211_11A, /* XXX */
1110 [IEEE80211_MODE_QUARTER] = IFM_IEEE80211_11A, /* XXX */
1111 [IEEE80211_MODE_11NA] = IFM_IEEE80211_11NA,
1112 [IEEE80211_MODE_11NG] = IFM_IEEE80211_11NG,
1118 ADD(ic, mword, mopt); /* STA mode has no cap */
1119 if (caps & IEEE80211_C_IBSS)
1120 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC);
1121 if (caps & IEEE80211_C_HOSTAP)
1122 ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP);
1123 if (caps & IEEE80211_C_AHDEMO)
1124 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0);
1125 if (caps & IEEE80211_C_MONITOR)
1126 ADD(media, mword, mopt | IFM_IEEE80211_MONITOR);
1127 if (caps & IEEE80211_C_WDS)
1128 ADD(media, mword, mopt | IFM_IEEE80211_WDS);
1129 if (caps & IEEE80211_C_MBSS)
1130 ADD(media, mword, mopt | IFM_IEEE80211_MBSS);
1135 * Setup the media data structures according to the channel and
1139 ieee80211_media_setup(struct ieee80211com *ic,
1140 struct ifmedia *media, int caps, int addsta,
1141 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat)
1143 int i, j, rate, maxrate, mword, r;
1144 enum ieee80211_phymode mode;
1145 const struct ieee80211_rateset *rs;
1146 struct ieee80211_rateset allrates;
1149 * Fill in media characteristics.
1151 ifmedia_init(media, 0, media_change, media_stat);
1154 * Add media for legacy operating modes.
1156 memset(&allrates, 0, sizeof(allrates));
1157 for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) {
1158 if (isclr(ic->ic_modecaps, mode))
1160 addmedia(media, caps, addsta, mode, IFM_AUTO);
1161 if (mode == IEEE80211_MODE_AUTO)
1163 rs = &ic->ic_sup_rates[mode];
1164 for (i = 0; i < rs->rs_nrates; i++) {
1165 rate = rs->rs_rates[i];
1166 mword = ieee80211_rate2media(ic, rate, mode);
1169 addmedia(media, caps, addsta, mode, mword);
1171 * Add legacy rate to the collection of all rates.
1173 r = rate & IEEE80211_RATE_VAL;
1174 for (j = 0; j < allrates.rs_nrates; j++)
1175 if (allrates.rs_rates[j] == r)
1177 if (j == allrates.rs_nrates) {
1178 /* unique, add to the set */
1179 allrates.rs_rates[j] = r;
1180 allrates.rs_nrates++;
1182 rate = (rate & IEEE80211_RATE_VAL) / 2;
1187 for (i = 0; i < allrates.rs_nrates; i++) {
1188 mword = ieee80211_rate2media(ic, allrates.rs_rates[i],
1189 IEEE80211_MODE_AUTO);
1192 /* NB: remove media options from mword */
1193 addmedia(media, caps, addsta,
1194 IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword));
1197 * Add HT/11n media. Note that we do not have enough
1198 * bits in the media subtype to express the MCS so we
1199 * use a "placeholder" media subtype and any fixed MCS
1200 * must be specified with a different mechanism.
1202 for (; mode <= IEEE80211_MODE_11NG; mode++) {
1203 if (isclr(ic->ic_modecaps, mode))
1205 addmedia(media, caps, addsta, mode, IFM_AUTO);
1206 addmedia(media, caps, addsta, mode, IFM_IEEE80211_MCS);
1208 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) ||
1209 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) {
1210 addmedia(media, caps, addsta,
1211 IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS);
1212 i = ic->ic_txstream * 8 - 1;
1213 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) &&
1214 (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI40))
1215 rate = ieee80211_htrates[i].ht40_rate_400ns;
1216 else if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40))
1217 rate = ieee80211_htrates[i].ht40_rate_800ns;
1218 else if ((ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI20))
1219 rate = ieee80211_htrates[i].ht20_rate_400ns;
1221 rate = ieee80211_htrates[i].ht20_rate_800ns;
1229 ieee80211_media_init(struct ieee80211com *ic)
1231 struct ifnet *ifp = ic->ic_ifp;
1234 /* NB: this works because the structure is initialized to zero */
1235 if (!LIST_EMPTY(&ic->ic_media.ifm_list)) {
1237 * We are re-initializing the channel list; clear
1238 * the existing media state as the media routines
1239 * don't suppress duplicates.
1241 ifmedia_removeall(&ic->ic_media);
1243 ieee80211_chan_init(ic);
1246 * Recalculate media settings in case new channel list changes
1247 * the set of available modes.
1249 maxrate = ieee80211_media_setup(ic, &ic->ic_media, ic->ic_caps, 1,
1250 ieee80211com_media_change, ieee80211com_media_status);
1251 /* NB: strip explicit mode; we're actually in autoselect */
1252 ifmedia_set(&ic->ic_media,
1253 media_status(ic->ic_opmode, ic->ic_curchan) &~
1254 (IFM_MMASK | IFM_IEEE80211_TURBO));
1256 ifp->if_baudrate = IF_Mbps(maxrate);
1258 /* XXX need to propagate new media settings to vap's */
1261 /* XXX inline or eliminate? */
1262 const struct ieee80211_rateset *
1263 ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c)
1265 /* XXX does this work for 11ng basic rates? */
1266 return &ic->ic_sup_rates[ieee80211_chan2mode(c)];
1270 ieee80211_announce(struct ieee80211com *ic)
1272 struct ifnet *ifp = ic->ic_ifp;
1274 enum ieee80211_phymode mode;
1275 const struct ieee80211_rateset *rs;
1277 /* NB: skip AUTO since it has no rates */
1278 for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) {
1279 if (isclr(ic->ic_modecaps, mode))
1281 if_printf(ifp, "%s rates: ", ieee80211_phymode_name[mode]);
1282 rs = &ic->ic_sup_rates[mode];
1283 for (i = 0; i < rs->rs_nrates; i++) {
1284 mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode);
1287 rate = ieee80211_media2rate(mword);
1288 kprintf("%s%d%sMbps", (i != 0 ? " " : ""),
1289 rate / 2, ((rate & 0x1) != 0 ? ".5" : ""));
1293 ieee80211_ht_announce(ic);
1297 ieee80211_announce_channels(struct ieee80211com *ic)
1299 const struct ieee80211_channel *c;
1303 kprintf("Chan Freq CW RegPwr MinPwr MaxPwr\n");
1304 for (i = 0; i < ic->ic_nchans; i++) {
1305 c = &ic->ic_channels[i];
1306 if (IEEE80211_IS_CHAN_ST(c))
1308 else if (IEEE80211_IS_CHAN_108A(c))
1310 else if (IEEE80211_IS_CHAN_108G(c))
1312 else if (IEEE80211_IS_CHAN_HT(c))
1314 else if (IEEE80211_IS_CHAN_A(c))
1316 else if (IEEE80211_IS_CHAN_ANYG(c))
1318 else if (IEEE80211_IS_CHAN_B(c))
1322 if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c))
1324 else if (IEEE80211_IS_CHAN_HALF(c))
1326 else if (IEEE80211_IS_CHAN_QUARTER(c))
1330 kprintf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n"
1331 , c->ic_ieee, c->ic_freq, type
1333 , IEEE80211_IS_CHAN_HT40U(c) ? '+' :
1334 IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' '
1336 , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0
1337 , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0
1343 media2mode(const struct ifmedia_entry *ime, uint32_t flags, uint16_t *mode)
1345 switch (IFM_MODE(ime->ifm_media)) {
1346 case IFM_IEEE80211_11A:
1347 *mode = IEEE80211_MODE_11A;
1349 case IFM_IEEE80211_11B:
1350 *mode = IEEE80211_MODE_11B;
1352 case IFM_IEEE80211_11G:
1353 *mode = IEEE80211_MODE_11G;
1355 case IFM_IEEE80211_FH:
1356 *mode = IEEE80211_MODE_FH;
1358 case IFM_IEEE80211_11NA:
1359 *mode = IEEE80211_MODE_11NA;
1361 case IFM_IEEE80211_11NG:
1362 *mode = IEEE80211_MODE_11NG;
1365 *mode = IEEE80211_MODE_AUTO;
1371 * Turbo mode is an ``option''.
1372 * XXX does not apply to AUTO
1374 if (ime->ifm_media & IFM_IEEE80211_TURBO) {
1375 if (*mode == IEEE80211_MODE_11A) {
1376 if (flags & IEEE80211_F_TURBOP)
1377 *mode = IEEE80211_MODE_TURBO_A;
1379 *mode = IEEE80211_MODE_STURBO_A;
1380 } else if (*mode == IEEE80211_MODE_11G)
1381 *mode = IEEE80211_MODE_TURBO_G;
1390 * Handle a media change request on the underlying interface.
1393 ieee80211com_media_change(struct ifnet *ifp)
1399 * Handle a media change request on the vap interface.
1402 ieee80211_media_change(struct ifnet *ifp)
1404 struct ieee80211vap *vap = ifp->if_softc;
1405 struct ifmedia_entry *ime = vap->iv_media.ifm_cur;
1408 if (!media2mode(ime, vap->iv_flags, &newmode))
1410 if (vap->iv_des_mode != newmode) {
1411 vap->iv_des_mode = newmode;
1412 /* XXX kick state machine if up+running */
1418 * Common code to calculate the media status word
1419 * from the operating mode and channel state.
1422 media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan)
1426 status = IFM_IEEE80211;
1428 case IEEE80211_M_STA:
1430 case IEEE80211_M_IBSS:
1431 status |= IFM_IEEE80211_ADHOC;
1433 case IEEE80211_M_HOSTAP:
1434 status |= IFM_IEEE80211_HOSTAP;
1436 case IEEE80211_M_MONITOR:
1437 status |= IFM_IEEE80211_MONITOR;
1439 case IEEE80211_M_AHDEMO:
1440 status |= IFM_IEEE80211_ADHOC | IFM_FLAG0;
1442 case IEEE80211_M_WDS:
1443 status |= IFM_IEEE80211_WDS;
1445 case IEEE80211_M_MBSS:
1446 status |= IFM_IEEE80211_MBSS;
1449 if (IEEE80211_IS_CHAN_HTA(chan)) {
1450 status |= IFM_IEEE80211_11NA;
1451 } else if (IEEE80211_IS_CHAN_HTG(chan)) {
1452 status |= IFM_IEEE80211_11NG;
1453 } else if (IEEE80211_IS_CHAN_A(chan)) {
1454 status |= IFM_IEEE80211_11A;
1455 } else if (IEEE80211_IS_CHAN_B(chan)) {
1456 status |= IFM_IEEE80211_11B;
1457 } else if (IEEE80211_IS_CHAN_ANYG(chan)) {
1458 status |= IFM_IEEE80211_11G;
1459 } else if (IEEE80211_IS_CHAN_FHSS(chan)) {
1460 status |= IFM_IEEE80211_FH;
1462 /* XXX else complain? */
1464 if (IEEE80211_IS_CHAN_TURBO(chan))
1465 status |= IFM_IEEE80211_TURBO;
1467 if (IEEE80211_IS_CHAN_HT20(chan))
1468 status |= IFM_IEEE80211_HT20;
1469 if (IEEE80211_IS_CHAN_HT40(chan))
1470 status |= IFM_IEEE80211_HT40;
1476 ieee80211com_media_status(struct ifnet *ifp, struct ifmediareq *imr)
1478 struct ieee80211com *ic = ifp->if_l2com;
1479 struct ieee80211vap *vap;
1481 imr->ifm_status = IFM_AVALID;
1482 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
1483 if (vap->iv_ifp->if_flags & IFF_UP) {
1484 imr->ifm_status |= IFM_ACTIVE;
1487 imr->ifm_active = media_status(ic->ic_opmode, ic->ic_curchan);
1488 if (imr->ifm_status & IFM_ACTIVE)
1489 imr->ifm_current = imr->ifm_active;
1493 ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr)
1495 struct ieee80211vap *vap = ifp->if_softc;
1496 struct ieee80211com *ic = vap->iv_ic;
1497 enum ieee80211_phymode mode;
1499 imr->ifm_status = IFM_AVALID;
1501 * NB: use the current channel's mode to lock down a xmit
1502 * rate only when running; otherwise we may have a mismatch
1503 * in which case the rate will not be convertible.
1505 if (vap->iv_state == IEEE80211_S_RUN ||
1506 vap->iv_state == IEEE80211_S_SLEEP) {
1507 imr->ifm_status |= IFM_ACTIVE;
1508 mode = ieee80211_chan2mode(ic->ic_curchan);
1510 mode = IEEE80211_MODE_AUTO;
1511 imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan);
1513 * Calculate a current rate if possible.
1515 if (vap->iv_txparms[mode].ucastrate != IEEE80211_FIXED_RATE_NONE) {
1517 * A fixed rate is set, report that.
1519 imr->ifm_active |= ieee80211_rate2media(ic,
1520 vap->iv_txparms[mode].ucastrate, mode);
1521 } else if (vap->iv_opmode == IEEE80211_M_STA) {
1523 * In station mode report the current transmit rate.
1525 imr->ifm_active |= ieee80211_rate2media(ic,
1526 vap->iv_bss->ni_txrate, mode);
1528 imr->ifm_active |= IFM_AUTO;
1529 if (imr->ifm_status & IFM_ACTIVE)
1530 imr->ifm_current = imr->ifm_active;
1534 * Set the current phy mode and recalculate the active channel
1535 * set based on the available channels for this mode. Also
1536 * select a new default/current channel if the current one is
1537 * inappropriate for this mode.
1540 ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode)
1543 * Adjust basic rates in 11b/11g supported rate set.
1544 * Note that if operating on a hal/quarter rate channel
1545 * this is a noop as those rates sets are different
1548 if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B)
1549 ieee80211_setbasicrates(&ic->ic_sup_rates[mode], mode);
1551 ic->ic_curmode = mode;
1552 ieee80211_reset_erp(ic); /* reset ERP state */
1558 * Return the phy mode for with the specified channel.
1560 enum ieee80211_phymode
1561 ieee80211_chan2mode(const struct ieee80211_channel *chan)
1564 if (IEEE80211_IS_CHAN_HTA(chan))
1565 return IEEE80211_MODE_11NA;
1566 else if (IEEE80211_IS_CHAN_HTG(chan))
1567 return IEEE80211_MODE_11NG;
1568 else if (IEEE80211_IS_CHAN_108G(chan))
1569 return IEEE80211_MODE_TURBO_G;
1570 else if (IEEE80211_IS_CHAN_ST(chan))
1571 return IEEE80211_MODE_STURBO_A;
1572 else if (IEEE80211_IS_CHAN_TURBO(chan))
1573 return IEEE80211_MODE_TURBO_A;
1574 else if (IEEE80211_IS_CHAN_HALF(chan))
1575 return IEEE80211_MODE_HALF;
1576 else if (IEEE80211_IS_CHAN_QUARTER(chan))
1577 return IEEE80211_MODE_QUARTER;
1578 else if (IEEE80211_IS_CHAN_A(chan))
1579 return IEEE80211_MODE_11A;
1580 else if (IEEE80211_IS_CHAN_ANYG(chan))
1581 return IEEE80211_MODE_11G;
1582 else if (IEEE80211_IS_CHAN_B(chan))
1583 return IEEE80211_MODE_11B;
1584 else if (IEEE80211_IS_CHAN_FHSS(chan))
1585 return IEEE80211_MODE_FH;
1587 /* NB: should not get here */
1588 kprintf("%s: cannot map channel to mode; freq %u flags 0x%x\n",
1589 __func__, chan->ic_freq, chan->ic_flags);
1590 return IEEE80211_MODE_11B;
1594 u_int match; /* rate + mode */
1595 u_int media; /* if_media rate */
1599 findmedia(const struct ratemedia rates[], int n, u_int match)
1603 for (i = 0; i < n; i++)
1604 if (rates[i].match == match)
1605 return rates[i].media;
1610 * Convert IEEE80211 rate value to ifmedia subtype.
1611 * Rate is either a legacy rate in units of 0.5Mbps
1615 ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode)
1617 static const struct ratemedia rates[] = {
1618 { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 },
1619 { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 },
1620 { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 },
1621 { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 },
1622 { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 },
1623 { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 },
1624 { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 },
1625 { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 },
1626 { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 },
1627 { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 },
1628 { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 },
1629 { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 },
1630 { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 },
1631 { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 },
1632 { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 },
1633 { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 },
1634 { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 },
1635 { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 },
1636 { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 },
1637 { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 },
1638 { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 },
1639 { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 },
1640 { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 },
1641 { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 },
1642 { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 },
1643 { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 },
1644 { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 },
1645 { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 },
1646 { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 },
1647 { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 },
1648 /* NB: OFDM72 doesn't realy exist so we don't handle it */
1650 static const struct ratemedia htrates[] = {
1651 { 0, IFM_IEEE80211_MCS },
1652 { 1, IFM_IEEE80211_MCS },
1653 { 2, IFM_IEEE80211_MCS },
1654 { 3, IFM_IEEE80211_MCS },
1655 { 4, IFM_IEEE80211_MCS },
1656 { 5, IFM_IEEE80211_MCS },
1657 { 6, IFM_IEEE80211_MCS },
1658 { 7, IFM_IEEE80211_MCS },
1659 { 8, IFM_IEEE80211_MCS },
1660 { 9, IFM_IEEE80211_MCS },
1661 { 10, IFM_IEEE80211_MCS },
1662 { 11, IFM_IEEE80211_MCS },
1663 { 12, IFM_IEEE80211_MCS },
1664 { 13, IFM_IEEE80211_MCS },
1665 { 14, IFM_IEEE80211_MCS },
1666 { 15, IFM_IEEE80211_MCS },
1667 { 16, IFM_IEEE80211_MCS },
1668 { 17, IFM_IEEE80211_MCS },
1669 { 18, IFM_IEEE80211_MCS },
1670 { 19, IFM_IEEE80211_MCS },
1671 { 20, IFM_IEEE80211_MCS },
1672 { 21, IFM_IEEE80211_MCS },
1673 { 22, IFM_IEEE80211_MCS },
1674 { 23, IFM_IEEE80211_MCS },
1675 { 24, IFM_IEEE80211_MCS },
1676 { 25, IFM_IEEE80211_MCS },
1677 { 26, IFM_IEEE80211_MCS },
1678 { 27, IFM_IEEE80211_MCS },
1679 { 28, IFM_IEEE80211_MCS },
1680 { 29, IFM_IEEE80211_MCS },
1681 { 30, IFM_IEEE80211_MCS },
1682 { 31, IFM_IEEE80211_MCS },
1683 { 32, IFM_IEEE80211_MCS },
1684 { 33, IFM_IEEE80211_MCS },
1685 { 34, IFM_IEEE80211_MCS },
1686 { 35, IFM_IEEE80211_MCS },
1687 { 36, IFM_IEEE80211_MCS },
1688 { 37, IFM_IEEE80211_MCS },
1689 { 38, IFM_IEEE80211_MCS },
1690 { 39, IFM_IEEE80211_MCS },
1691 { 40, IFM_IEEE80211_MCS },
1692 { 41, IFM_IEEE80211_MCS },
1693 { 42, IFM_IEEE80211_MCS },
1694 { 43, IFM_IEEE80211_MCS },
1695 { 44, IFM_IEEE80211_MCS },
1696 { 45, IFM_IEEE80211_MCS },
1697 { 46, IFM_IEEE80211_MCS },
1698 { 47, IFM_IEEE80211_MCS },
1699 { 48, IFM_IEEE80211_MCS },
1700 { 49, IFM_IEEE80211_MCS },
1701 { 50, IFM_IEEE80211_MCS },
1702 { 51, IFM_IEEE80211_MCS },
1703 { 52, IFM_IEEE80211_MCS },
1704 { 53, IFM_IEEE80211_MCS },
1705 { 54, IFM_IEEE80211_MCS },
1706 { 55, IFM_IEEE80211_MCS },
1707 { 56, IFM_IEEE80211_MCS },
1708 { 57, IFM_IEEE80211_MCS },
1709 { 58, IFM_IEEE80211_MCS },
1710 { 59, IFM_IEEE80211_MCS },
1711 { 60, IFM_IEEE80211_MCS },
1712 { 61, IFM_IEEE80211_MCS },
1713 { 62, IFM_IEEE80211_MCS },
1714 { 63, IFM_IEEE80211_MCS },
1715 { 64, IFM_IEEE80211_MCS },
1716 { 65, IFM_IEEE80211_MCS },
1717 { 66, IFM_IEEE80211_MCS },
1718 { 67, IFM_IEEE80211_MCS },
1719 { 68, IFM_IEEE80211_MCS },
1720 { 69, IFM_IEEE80211_MCS },
1721 { 70, IFM_IEEE80211_MCS },
1722 { 71, IFM_IEEE80211_MCS },
1723 { 72, IFM_IEEE80211_MCS },
1724 { 73, IFM_IEEE80211_MCS },
1725 { 74, IFM_IEEE80211_MCS },
1726 { 75, IFM_IEEE80211_MCS },
1727 { 76, IFM_IEEE80211_MCS },
1732 * Check 11n rates first for match as an MCS.
1734 if (mode == IEEE80211_MODE_11NA) {
1735 if (rate & IEEE80211_RATE_MCS) {
1736 rate &= ~IEEE80211_RATE_MCS;
1737 m = findmedia(htrates, nitems(htrates), rate);
1739 return m | IFM_IEEE80211_11NA;
1741 } else if (mode == IEEE80211_MODE_11NG) {
1742 /* NB: 12 is ambiguous, it will be treated as an MCS */
1743 if (rate & IEEE80211_RATE_MCS) {
1744 rate &= ~IEEE80211_RATE_MCS;
1745 m = findmedia(htrates, nitems(htrates), rate);
1747 return m | IFM_IEEE80211_11NG;
1750 rate &= IEEE80211_RATE_VAL;
1752 case IEEE80211_MODE_11A:
1753 case IEEE80211_MODE_HALF: /* XXX good 'nuf */
1754 case IEEE80211_MODE_QUARTER:
1755 case IEEE80211_MODE_11NA:
1756 case IEEE80211_MODE_TURBO_A:
1757 case IEEE80211_MODE_STURBO_A:
1758 return findmedia(rates, nitems(rates),
1759 rate | IFM_IEEE80211_11A);
1760 case IEEE80211_MODE_11B:
1761 return findmedia(rates, nitems(rates),
1762 rate | IFM_IEEE80211_11B);
1763 case IEEE80211_MODE_FH:
1764 return findmedia(rates, nitems(rates),
1765 rate | IFM_IEEE80211_FH);
1766 case IEEE80211_MODE_AUTO:
1767 /* NB: ic may be NULL for some drivers */
1768 if (ic != NULL && ic->ic_phytype == IEEE80211_T_FH)
1769 return findmedia(rates, nitems(rates),
1770 rate | IFM_IEEE80211_FH);
1771 /* NB: hack, 11g matches both 11b+11a rates */
1773 case IEEE80211_MODE_11G:
1774 case IEEE80211_MODE_11NG:
1775 case IEEE80211_MODE_TURBO_G:
1776 return findmedia(rates, nitems(rates), rate | IFM_IEEE80211_11G);
1782 ieee80211_media2rate(int mword)
1784 static const int ieeerates[] = {
1788 2, /* IFM_IEEE80211_FH1 */
1789 4, /* IFM_IEEE80211_FH2 */
1790 2, /* IFM_IEEE80211_DS1 */
1791 4, /* IFM_IEEE80211_DS2 */
1792 11, /* IFM_IEEE80211_DS5 */
1793 22, /* IFM_IEEE80211_DS11 */
1794 44, /* IFM_IEEE80211_DS22 */
1795 12, /* IFM_IEEE80211_OFDM6 */
1796 18, /* IFM_IEEE80211_OFDM9 */
1797 24, /* IFM_IEEE80211_OFDM12 */
1798 36, /* IFM_IEEE80211_OFDM18 */
1799 48, /* IFM_IEEE80211_OFDM24 */
1800 72, /* IFM_IEEE80211_OFDM36 */
1801 96, /* IFM_IEEE80211_OFDM48 */
1802 108, /* IFM_IEEE80211_OFDM54 */
1803 144, /* IFM_IEEE80211_OFDM72 */
1804 0, /* IFM_IEEE80211_DS354k */
1805 0, /* IFM_IEEE80211_DS512k */
1806 6, /* IFM_IEEE80211_OFDM3 */
1807 9, /* IFM_IEEE80211_OFDM4 */
1808 54, /* IFM_IEEE80211_OFDM27 */
1809 -1, /* IFM_IEEE80211_MCS */
1811 return IFM_SUBTYPE(mword) < nitems(ieeerates) ?
1812 ieeerates[IFM_SUBTYPE(mword)] : 0;
1816 * The following hash function is adapted from "Hash Functions" by Bob Jenkins
1817 * ("Algorithm Alley", Dr. Dobbs Journal, September 1997).
1819 #define mix(a, b, c) \
1821 a -= b; a -= c; a ^= (c >> 13); \
1822 b -= c; b -= a; b ^= (a << 8); \
1823 c -= a; c -= b; c ^= (b >> 13); \
1824 a -= b; a -= c; a ^= (c >> 12); \
1825 b -= c; b -= a; b ^= (a << 16); \
1826 c -= a; c -= b; c ^= (b >> 5); \
1827 a -= b; a -= c; a ^= (c >> 3); \
1828 b -= c; b -= a; b ^= (a << 10); \
1829 c -= a; c -= b; c ^= (b >> 15); \
1830 } while (/*CONSTCOND*/0)
1833 ieee80211_mac_hash(const struct ieee80211com *ic,
1834 const uint8_t addr[IEEE80211_ADDR_LEN])
1836 uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = ic->ic_hash_key;