2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2001 Atsushi Onoe
5 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
33 * IEEE 802.11 generic handler
37 #include <sys/param.h>
38 #include <sys/systm.h>
39 #include <sys/kernel.h>
40 #include <sys/malloc.h>
41 #include <sys/socket.h>
44 #include <machine/stdarg.h>
47 #include <net/if_var.h>
48 #include <net/if_dl.h>
49 #include <net/if_media.h>
50 #include <net/if_types.h>
51 #include <net/ethernet.h>
53 #include <net80211/ieee80211_var.h>
54 #include <net80211/ieee80211_regdomain.h>
55 #ifdef IEEE80211_SUPPORT_SUPERG
56 #include <net80211/ieee80211_superg.h>
58 #include <net80211/ieee80211_ratectl.h>
59 #include <net80211/ieee80211_vht.h>
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",
76 [IEEE80211_MODE_VHT_2GHZ] = "11acg",
77 [IEEE80211_MODE_VHT_5GHZ] = "11ac",
79 /* map ieee80211_opmode to the corresponding capability bit */
80 const int ieee80211_opcap[IEEE80211_OPMODE_MAX] = {
81 [IEEE80211_M_IBSS] = IEEE80211_C_IBSS,
82 [IEEE80211_M_WDS] = IEEE80211_C_WDS,
83 [IEEE80211_M_STA] = IEEE80211_C_STA,
84 [IEEE80211_M_AHDEMO] = IEEE80211_C_AHDEMO,
85 [IEEE80211_M_HOSTAP] = IEEE80211_C_HOSTAP,
86 [IEEE80211_M_MONITOR] = IEEE80211_C_MONITOR,
87 #ifdef IEEE80211_SUPPORT_MESH
88 [IEEE80211_M_MBSS] = IEEE80211_C_MBSS,
92 const uint8_t ieee80211broadcastaddr[IEEE80211_ADDR_LEN] =
93 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
95 static void ieee80211_syncflag_locked(struct ieee80211com *ic, int flag);
96 static void ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag);
97 static void ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag);
98 static void ieee80211_syncflag_vht_locked(struct ieee80211com *ic, int flag);
99 static int ieee80211_media_setup(struct ieee80211com *ic,
100 struct ifmedia *media, int caps, int addsta,
101 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat);
102 static int media_status(enum ieee80211_opmode,
103 const struct ieee80211_channel *);
104 static uint64_t ieee80211_get_counter(struct ifnet *, ift_counter);
106 MALLOC_DEFINE(M_80211_VAP, "80211vap", "802.11 vap state");
109 * Default supported rates for 802.11 operation (in IEEE .5Mb units).
111 #define B(r) ((r) | IEEE80211_RATE_BASIC)
112 static const struct ieee80211_rateset ieee80211_rateset_11a =
113 { 8, { B(12), 18, B(24), 36, B(48), 72, 96, 108 } };
114 static const struct ieee80211_rateset ieee80211_rateset_half =
115 { 8, { B(6), 9, B(12), 18, B(24), 36, 48, 54 } };
116 static const struct ieee80211_rateset ieee80211_rateset_quarter =
117 { 8, { B(3), 4, B(6), 9, B(12), 18, 24, 27 } };
118 static const struct ieee80211_rateset ieee80211_rateset_11b =
119 { 4, { B(2), B(4), B(11), B(22) } };
120 /* NB: OFDM rates are handled specially based on mode */
121 static const struct ieee80211_rateset ieee80211_rateset_11g =
122 { 12, { B(2), B(4), B(11), B(22), 12, 18, 24, 36, 48, 72, 96, 108 } };
125 static int set_vht_extchan(struct ieee80211_channel *c);
128 * Fill in 802.11 available channel set, mark
129 * all available channels as active, and pick
130 * a default channel if not already specified.
133 ieee80211_chan_init(struct ieee80211com *ic)
135 #define DEFAULTRATES(m, def) do { \
136 if (ic->ic_sup_rates[m].rs_nrates == 0) \
137 ic->ic_sup_rates[m] = def; \
139 struct ieee80211_channel *c;
142 KASSERT(0 < ic->ic_nchans && ic->ic_nchans <= IEEE80211_CHAN_MAX,
143 ("invalid number of channels specified: %u", ic->ic_nchans));
144 memset(ic->ic_chan_avail, 0, sizeof(ic->ic_chan_avail));
145 memset(ic->ic_modecaps, 0, sizeof(ic->ic_modecaps));
146 setbit(ic->ic_modecaps, IEEE80211_MODE_AUTO);
147 for (i = 0; i < ic->ic_nchans; i++) {
148 c = &ic->ic_channels[i];
149 KASSERT(c->ic_flags != 0, ("channel with no flags"));
151 * Help drivers that work only with frequencies by filling
152 * in IEEE channel #'s if not already calculated. Note this
153 * mimics similar work done in ieee80211_setregdomain when
154 * changing regulatory state.
157 c->ic_ieee = ieee80211_mhz2ieee(c->ic_freq,c->ic_flags);
160 * Setup the HT40/VHT40 upper/lower bits.
161 * The VHT80 math is done elsewhere.
163 if (IEEE80211_IS_CHAN_HT40(c) && c->ic_extieee == 0)
164 c->ic_extieee = ieee80211_mhz2ieee(c->ic_freq +
165 (IEEE80211_IS_CHAN_HT40U(c) ? 20 : -20),
168 /* Update VHT math */
170 * XXX VHT again, note that this assumes VHT80 channels
175 /* default max tx power to max regulatory */
176 if (c->ic_maxpower == 0)
177 c->ic_maxpower = 2*c->ic_maxregpower;
178 setbit(ic->ic_chan_avail, c->ic_ieee);
180 * Identify mode capabilities.
182 if (IEEE80211_IS_CHAN_A(c))
183 setbit(ic->ic_modecaps, IEEE80211_MODE_11A);
184 if (IEEE80211_IS_CHAN_B(c))
185 setbit(ic->ic_modecaps, IEEE80211_MODE_11B);
186 if (IEEE80211_IS_CHAN_ANYG(c))
187 setbit(ic->ic_modecaps, IEEE80211_MODE_11G);
188 if (IEEE80211_IS_CHAN_FHSS(c))
189 setbit(ic->ic_modecaps, IEEE80211_MODE_FH);
190 if (IEEE80211_IS_CHAN_108A(c))
191 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_A);
192 if (IEEE80211_IS_CHAN_108G(c))
193 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_G);
194 if (IEEE80211_IS_CHAN_ST(c))
195 setbit(ic->ic_modecaps, IEEE80211_MODE_STURBO_A);
196 if (IEEE80211_IS_CHAN_HALF(c))
197 setbit(ic->ic_modecaps, IEEE80211_MODE_HALF);
198 if (IEEE80211_IS_CHAN_QUARTER(c))
199 setbit(ic->ic_modecaps, IEEE80211_MODE_QUARTER);
200 if (IEEE80211_IS_CHAN_HTA(c))
201 setbit(ic->ic_modecaps, IEEE80211_MODE_11NA);
202 if (IEEE80211_IS_CHAN_HTG(c))
203 setbit(ic->ic_modecaps, IEEE80211_MODE_11NG);
204 if (IEEE80211_IS_CHAN_VHTA(c))
205 setbit(ic->ic_modecaps, IEEE80211_MODE_VHT_5GHZ);
206 if (IEEE80211_IS_CHAN_VHTG(c))
207 setbit(ic->ic_modecaps, IEEE80211_MODE_VHT_2GHZ);
209 /* initialize candidate channels to all available */
210 memcpy(ic->ic_chan_active, ic->ic_chan_avail,
211 sizeof(ic->ic_chan_avail));
213 /* sort channel table to allow lookup optimizations */
214 ieee80211_sort_channels(ic->ic_channels, ic->ic_nchans);
216 /* invalidate any previous state */
217 ic->ic_bsschan = IEEE80211_CHAN_ANYC;
218 ic->ic_prevchan = NULL;
219 ic->ic_csa_newchan = NULL;
220 /* arbitrarily pick the first channel */
221 ic->ic_curchan = &ic->ic_channels[0];
222 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
224 /* fillin well-known rate sets if driver has not specified */
225 DEFAULTRATES(IEEE80211_MODE_11B, ieee80211_rateset_11b);
226 DEFAULTRATES(IEEE80211_MODE_11G, ieee80211_rateset_11g);
227 DEFAULTRATES(IEEE80211_MODE_11A, ieee80211_rateset_11a);
228 DEFAULTRATES(IEEE80211_MODE_TURBO_A, ieee80211_rateset_11a);
229 DEFAULTRATES(IEEE80211_MODE_TURBO_G, ieee80211_rateset_11g);
230 DEFAULTRATES(IEEE80211_MODE_STURBO_A, ieee80211_rateset_11a);
231 DEFAULTRATES(IEEE80211_MODE_HALF, ieee80211_rateset_half);
232 DEFAULTRATES(IEEE80211_MODE_QUARTER, ieee80211_rateset_quarter);
233 DEFAULTRATES(IEEE80211_MODE_11NA, ieee80211_rateset_11a);
234 DEFAULTRATES(IEEE80211_MODE_11NG, ieee80211_rateset_11g);
235 DEFAULTRATES(IEEE80211_MODE_VHT_2GHZ, ieee80211_rateset_11g);
236 DEFAULTRATES(IEEE80211_MODE_VHT_5GHZ, ieee80211_rateset_11a);
239 * Setup required information to fill the mcsset field, if driver did
240 * not. Assume a 2T2R setup for historic reasons.
242 if (ic->ic_rxstream == 0)
244 if (ic->ic_txstream == 0)
247 ieee80211_init_suphtrates(ic);
250 * Set auto mode to reset active channel state and any desired channel.
252 (void) ieee80211_setmode(ic, IEEE80211_MODE_AUTO);
257 null_update_mcast(struct ieee80211com *ic)
260 ic_printf(ic, "need multicast update callback\n");
264 null_update_promisc(struct ieee80211com *ic)
267 ic_printf(ic, "need promiscuous mode update callback\n");
271 null_update_chw(struct ieee80211com *ic)
274 ic_printf(ic, "%s: need callback\n", __func__);
278 ic_printf(struct ieee80211com *ic, const char * fmt, ...)
283 retval = printf("%s: ", ic->ic_name);
285 retval += vprintf(fmt, ap);
290 static LIST_HEAD(, ieee80211com) ic_head = LIST_HEAD_INITIALIZER(ic_head);
291 static struct mtx ic_list_mtx;
292 MTX_SYSINIT(ic_list, &ic_list_mtx, "ieee80211com list", MTX_DEF);
295 sysctl_ieee80211coms(SYSCTL_HANDLER_ARGS)
297 struct ieee80211com *ic;
302 error = sysctl_wire_old_buffer(req, 0);
305 sbuf_new_for_sysctl(&sb, NULL, 8, req);
306 sbuf_clear_flags(&sb, SBUF_INCLUDENUL);
308 mtx_lock(&ic_list_mtx);
309 LIST_FOREACH(ic, &ic_head, ic_next) {
310 sbuf_printf(&sb, "%s%s", sp, ic->ic_name);
313 mtx_unlock(&ic_list_mtx);
314 error = sbuf_finish(&sb);
319 SYSCTL_PROC(_net_wlan, OID_AUTO, devices,
320 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0,
321 sysctl_ieee80211coms, "A", "names of available 802.11 devices");
324 * Attach/setup the common net80211 state. Called by
325 * the driver on attach to prior to creating any vap's.
328 ieee80211_ifattach(struct ieee80211com *ic)
331 IEEE80211_LOCK_INIT(ic, ic->ic_name);
332 IEEE80211_TX_LOCK_INIT(ic, ic->ic_name);
333 TAILQ_INIT(&ic->ic_vaps);
335 /* Create a taskqueue for all state changes */
336 ic->ic_tq = taskqueue_create("ic_taskq", M_WAITOK | M_ZERO,
337 taskqueue_thread_enqueue, &ic->ic_tq);
338 taskqueue_start_threads(&ic->ic_tq, 1, PI_NET, "%s net80211 taskq",
340 ic->ic_ierrors = counter_u64_alloc(M_WAITOK);
341 ic->ic_oerrors = counter_u64_alloc(M_WAITOK);
343 * Fill in 802.11 available channel set, mark all
344 * available channels as active, and pick a default
345 * channel if not already specified.
347 ieee80211_chan_init(ic);
349 ic->ic_update_mcast = null_update_mcast;
350 ic->ic_update_promisc = null_update_promisc;
351 ic->ic_update_chw = null_update_chw;
353 ic->ic_hash_key = arc4random();
354 ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT;
355 ic->ic_lintval = ic->ic_bintval;
356 ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX;
358 ieee80211_crypto_attach(ic);
359 ieee80211_node_attach(ic);
360 ieee80211_power_attach(ic);
361 ieee80211_proto_attach(ic);
362 #ifdef IEEE80211_SUPPORT_SUPERG
363 ieee80211_superg_attach(ic);
365 ieee80211_ht_attach(ic);
366 ieee80211_vht_attach(ic);
367 ieee80211_scan_attach(ic);
368 ieee80211_regdomain_attach(ic);
369 ieee80211_dfs_attach(ic);
371 ieee80211_sysctl_attach(ic);
373 mtx_lock(&ic_list_mtx);
374 LIST_INSERT_HEAD(&ic_head, ic, ic_next);
375 mtx_unlock(&ic_list_mtx);
379 * Detach net80211 state on device detach. Tear down
380 * all vap's and reclaim all common state prior to the
381 * device state going away. Note we may call back into
382 * driver; it must be prepared for this.
385 ieee80211_ifdetach(struct ieee80211com *ic)
387 struct ieee80211vap *vap;
390 * We use this as an indicator that ifattach never had a chance to be
391 * called, e.g. early driver attach failed and ifdetach was called
392 * during subsequent detach. Never fear, for we have nothing to do
395 if (ic->ic_tq == NULL)
398 mtx_lock(&ic_list_mtx);
399 LIST_REMOVE(ic, ic_next);
400 mtx_unlock(&ic_list_mtx);
402 taskqueue_drain(taskqueue_thread, &ic->ic_restart_task);
405 * The VAP is responsible for setting and clearing
406 * the VIMAGE context.
408 while ((vap = TAILQ_FIRST(&ic->ic_vaps)) != NULL) {
409 ieee80211_com_vdetach(vap);
410 ieee80211_vap_destroy(vap);
412 ieee80211_waitfor_parent(ic);
414 ieee80211_sysctl_detach(ic);
415 ieee80211_dfs_detach(ic);
416 ieee80211_regdomain_detach(ic);
417 ieee80211_scan_detach(ic);
418 #ifdef IEEE80211_SUPPORT_SUPERG
419 ieee80211_superg_detach(ic);
421 ieee80211_vht_detach(ic);
422 ieee80211_ht_detach(ic);
423 /* NB: must be called before ieee80211_node_detach */
424 ieee80211_proto_detach(ic);
425 ieee80211_crypto_detach(ic);
426 ieee80211_power_detach(ic);
427 ieee80211_node_detach(ic);
429 counter_u64_free(ic->ic_ierrors);
430 counter_u64_free(ic->ic_oerrors);
432 taskqueue_free(ic->ic_tq);
433 IEEE80211_TX_LOCK_DESTROY(ic);
434 IEEE80211_LOCK_DESTROY(ic);
437 struct ieee80211com *
438 ieee80211_find_com(const char *name)
440 struct ieee80211com *ic;
442 mtx_lock(&ic_list_mtx);
443 LIST_FOREACH(ic, &ic_head, ic_next)
444 if (strcmp(ic->ic_name, name) == 0)
446 mtx_unlock(&ic_list_mtx);
452 ieee80211_iterate_coms(ieee80211_com_iter_func *f, void *arg)
454 struct ieee80211com *ic;
456 mtx_lock(&ic_list_mtx);
457 LIST_FOREACH(ic, &ic_head, ic_next)
459 mtx_unlock(&ic_list_mtx);
463 * Default reset method for use with the ioctl support. This
464 * method is invoked after any state change in the 802.11
465 * layer that should be propagated to the hardware but not
466 * require re-initialization of the 802.11 state machine (e.g
467 * rescanning for an ap). We always return ENETRESET which
468 * should cause the driver to re-initialize the device. Drivers
469 * can override this method to implement more optimized support.
472 default_reset(struct ieee80211vap *vap, u_long cmd)
478 * Default for updating the VAP default TX key index.
480 * Drivers that support TX offload as well as hardware encryption offload
481 * may need to be informed of key index changes separate from the key
485 default_update_deftxkey(struct ieee80211vap *vap, ieee80211_keyix kid)
488 /* XXX assert validity */
489 /* XXX assert we're in a key update block */
490 vap->iv_def_txkey = kid;
494 * Add underlying device errors to vap errors.
497 ieee80211_get_counter(struct ifnet *ifp, ift_counter cnt)
499 struct ieee80211vap *vap = ifp->if_softc;
500 struct ieee80211com *ic = vap->iv_ic;
503 rv = if_get_counter_default(ifp, cnt);
505 case IFCOUNTER_OERRORS:
506 rv += counter_u64_fetch(ic->ic_oerrors);
508 case IFCOUNTER_IERRORS:
509 rv += counter_u64_fetch(ic->ic_ierrors);
519 * Prepare a vap for use. Drivers use this call to
520 * setup net80211 state in new vap's prior attaching
521 * them with ieee80211_vap_attach (below).
524 ieee80211_vap_setup(struct ieee80211com *ic, struct ieee80211vap *vap,
525 const char name[IFNAMSIZ], int unit, enum ieee80211_opmode opmode,
526 int flags, const uint8_t bssid[IEEE80211_ADDR_LEN])
530 ifp = if_alloc(IFT_ETHER);
532 ic_printf(ic, "%s: unable to allocate ifnet\n",
536 if_initname(ifp, name, unit);
537 ifp->if_softc = vap; /* back pointer */
538 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST;
539 ifp->if_transmit = ieee80211_vap_transmit;
540 ifp->if_qflush = ieee80211_vap_qflush;
541 ifp->if_ioctl = ieee80211_ioctl;
542 ifp->if_init = ieee80211_init;
543 ifp->if_get_counter = ieee80211_get_counter;
547 vap->iv_flags = ic->ic_flags; /* propagate common flags */
548 vap->iv_flags_ext = ic->ic_flags_ext;
549 vap->iv_flags_ven = ic->ic_flags_ven;
550 vap->iv_caps = ic->ic_caps &~ IEEE80211_C_OPMODE;
552 /* 11n capabilities - XXX methodize */
553 vap->iv_htcaps = ic->ic_htcaps;
554 vap->iv_htextcaps = ic->ic_htextcaps;
556 /* 11ac capabilities - XXX methodize */
557 vap->iv_vhtcaps = ic->ic_vhtcaps;
558 vap->iv_vhtextcaps = ic->ic_vhtextcaps;
560 vap->iv_opmode = opmode;
561 vap->iv_caps |= ieee80211_opcap[opmode];
562 IEEE80211_ADDR_COPY(vap->iv_myaddr, ic->ic_macaddr);
564 case IEEE80211_M_WDS:
566 * WDS links must specify the bssid of the far end.
567 * For legacy operation this is a static relationship.
568 * For non-legacy operation the station must associate
569 * and be authorized to pass traffic. Plumbing the
570 * vap to the proper node happens when the vap
571 * transitions to RUN state.
573 IEEE80211_ADDR_COPY(vap->iv_des_bssid, bssid);
574 vap->iv_flags |= IEEE80211_F_DESBSSID;
575 if (flags & IEEE80211_CLONE_WDSLEGACY)
576 vap->iv_flags_ext |= IEEE80211_FEXT_WDSLEGACY;
578 #ifdef IEEE80211_SUPPORT_TDMA
579 case IEEE80211_M_AHDEMO:
580 if (flags & IEEE80211_CLONE_TDMA) {
581 /* NB: checked before clone operation allowed */
582 KASSERT(ic->ic_caps & IEEE80211_C_TDMA,
583 ("not TDMA capable, ic_caps 0x%x", ic->ic_caps));
585 * Propagate TDMA capability to mark vap; this
586 * cannot be removed and is used to distinguish
587 * regular ahdemo operation from ahdemo+tdma.
589 vap->iv_caps |= IEEE80211_C_TDMA;
596 /* auto-enable s/w beacon miss support */
597 if (flags & IEEE80211_CLONE_NOBEACONS)
598 vap->iv_flags_ext |= IEEE80211_FEXT_SWBMISS;
599 /* auto-generated or user supplied MAC address */
600 if (flags & (IEEE80211_CLONE_BSSID|IEEE80211_CLONE_MACADDR))
601 vap->iv_flags_ext |= IEEE80211_FEXT_UNIQMAC;
603 * Enable various functionality by default if we're
604 * capable; the driver can override us if it knows better.
606 if (vap->iv_caps & IEEE80211_C_WME)
607 vap->iv_flags |= IEEE80211_F_WME;
608 if (vap->iv_caps & IEEE80211_C_BURST)
609 vap->iv_flags |= IEEE80211_F_BURST;
610 /* NB: bg scanning only makes sense for station mode right now */
611 if (vap->iv_opmode == IEEE80211_M_STA &&
612 (vap->iv_caps & IEEE80211_C_BGSCAN))
613 vap->iv_flags |= IEEE80211_F_BGSCAN;
614 vap->iv_flags |= IEEE80211_F_DOTH; /* XXX no cap, just ena */
615 /* NB: DFS support only makes sense for ap mode right now */
616 if (vap->iv_opmode == IEEE80211_M_HOSTAP &&
617 (vap->iv_caps & IEEE80211_C_DFS))
618 vap->iv_flags_ext |= IEEE80211_FEXT_DFS;
619 /* NB: only flip on U-APSD for hostap/sta for now */
620 if ((vap->iv_opmode == IEEE80211_M_STA)
621 || (vap->iv_opmode == IEEE80211_M_HOSTAP)) {
622 if (vap->iv_caps & IEEE80211_C_UAPSD)
623 vap->iv_flags_ext |= IEEE80211_FEXT_UAPSD;
626 vap->iv_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */
627 vap->iv_bmissthreshold = IEEE80211_HWBMISS_DEFAULT;
628 vap->iv_dtim_period = IEEE80211_DTIM_DEFAULT;
630 * Install a default reset method for the ioctl support;
631 * the driver can override this.
633 vap->iv_reset = default_reset;
636 * Install a default crypto key update method, the driver
639 vap->iv_update_deftxkey = default_update_deftxkey;
641 ieee80211_sysctl_vattach(vap);
642 ieee80211_crypto_vattach(vap);
643 ieee80211_node_vattach(vap);
644 ieee80211_power_vattach(vap);
645 ieee80211_proto_vattach(vap);
646 #ifdef IEEE80211_SUPPORT_SUPERG
647 ieee80211_superg_vattach(vap);
649 ieee80211_ht_vattach(vap);
650 ieee80211_vht_vattach(vap);
651 ieee80211_scan_vattach(vap);
652 ieee80211_regdomain_vattach(vap);
653 ieee80211_radiotap_vattach(vap);
654 ieee80211_vap_reset_erp(vap);
655 ieee80211_ratectl_set(vap, IEEE80211_RATECTL_NONE);
661 * Activate a vap. State should have been prepared with a
662 * call to ieee80211_vap_setup and by the driver. On return
663 * from this call the vap is ready for use.
666 ieee80211_vap_attach(struct ieee80211vap *vap, ifm_change_cb_t media_change,
667 ifm_stat_cb_t media_stat, const uint8_t macaddr[IEEE80211_ADDR_LEN])
669 struct ifnet *ifp = vap->iv_ifp;
670 struct ieee80211com *ic = vap->iv_ic;
671 struct ifmediareq imr;
674 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
675 "%s: %s parent %s flags 0x%x flags_ext 0x%x\n",
676 __func__, ieee80211_opmode_name[vap->iv_opmode],
677 ic->ic_name, vap->iv_flags, vap->iv_flags_ext);
680 * Do late attach work that cannot happen until after
681 * the driver has had a chance to override defaults.
683 ieee80211_node_latevattach(vap);
684 ieee80211_power_latevattach(vap);
686 maxrate = ieee80211_media_setup(ic, &vap->iv_media, vap->iv_caps,
687 vap->iv_opmode == IEEE80211_M_STA, media_change, media_stat);
688 ieee80211_media_status(ifp, &imr);
689 /* NB: strip explicit mode; we're actually in autoselect */
690 ifmedia_set(&vap->iv_media,
691 imr.ifm_active &~ (IFM_MMASK | IFM_IEEE80211_TURBO));
693 ifp->if_baudrate = IF_Mbps(maxrate);
695 ether_ifattach(ifp, macaddr);
696 IEEE80211_ADDR_COPY(vap->iv_myaddr, IF_LLADDR(ifp));
697 /* hook output method setup by ether_ifattach */
698 vap->iv_output = ifp->if_output;
699 ifp->if_output = ieee80211_output;
700 /* NB: if_mtu set by ether_ifattach to ETHERMTU */
703 TAILQ_INSERT_TAIL(&ic->ic_vaps, vap, iv_next);
704 ieee80211_syncflag_locked(ic, IEEE80211_F_WME);
705 #ifdef IEEE80211_SUPPORT_SUPERG
706 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP);
708 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF);
709 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST);
710 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT);
711 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40);
713 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_VHT);
714 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT40);
715 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT80);
716 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT80P80);
717 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT160);
718 IEEE80211_UNLOCK(ic);
724 * Tear down vap state and reclaim the ifnet.
725 * The driver is assumed to have prepared for
726 * this; e.g. by turning off interrupts for the
730 ieee80211_vap_detach(struct ieee80211vap *vap)
732 struct ieee80211com *ic = vap->iv_ic;
733 struct ifnet *ifp = vap->iv_ifp;
735 CURVNET_SET(ifp->if_vnet);
737 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s parent %s\n",
738 __func__, ieee80211_opmode_name[vap->iv_opmode], ic->ic_name);
740 /* NB: bpfdetach is called by ether_ifdetach and claims all taps */
746 * Flush any deferred vap tasks.
748 ieee80211_draintask(ic, &vap->iv_nstate_task);
749 ieee80211_draintask(ic, &vap->iv_swbmiss_task);
750 ieee80211_draintask(ic, &vap->iv_wme_task);
751 ieee80211_draintask(ic, &ic->ic_parent_task);
753 /* XXX band-aid until ifnet handles this for us */
754 taskqueue_drain(taskqueue_swi, &ifp->if_linktask);
757 KASSERT(vap->iv_state == IEEE80211_S_INIT , ("vap still running"));
758 TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next);
759 ieee80211_syncflag_locked(ic, IEEE80211_F_WME);
760 #ifdef IEEE80211_SUPPORT_SUPERG
761 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP);
763 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF);
764 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST);
765 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT);
766 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40);
768 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_VHT);
769 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT40);
770 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT80);
771 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT80P80);
772 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT160);
774 /* NB: this handles the bpfdetach done below */
775 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_BPF);
776 if (vap->iv_ifflags & IFF_PROMISC)
777 ieee80211_promisc(vap, false);
778 if (vap->iv_ifflags & IFF_ALLMULTI)
779 ieee80211_allmulti(vap, false);
780 IEEE80211_UNLOCK(ic);
782 ifmedia_removeall(&vap->iv_media);
784 ieee80211_radiotap_vdetach(vap);
785 ieee80211_regdomain_vdetach(vap);
786 ieee80211_scan_vdetach(vap);
787 #ifdef IEEE80211_SUPPORT_SUPERG
788 ieee80211_superg_vdetach(vap);
790 ieee80211_vht_vdetach(vap);
791 ieee80211_ht_vdetach(vap);
792 /* NB: must be before ieee80211_node_vdetach */
793 ieee80211_proto_vdetach(vap);
794 ieee80211_crypto_vdetach(vap);
795 ieee80211_power_vdetach(vap);
796 ieee80211_node_vdetach(vap);
797 ieee80211_sysctl_vdetach(vap);
805 * Count number of vaps in promisc, and issue promisc on
806 * parent respectively.
809 ieee80211_promisc(struct ieee80211vap *vap, bool on)
811 struct ieee80211com *ic = vap->iv_ic;
813 IEEE80211_LOCK_ASSERT(ic);
816 if (++ic->ic_promisc == 1)
817 ieee80211_runtask(ic, &ic->ic_promisc_task);
819 KASSERT(ic->ic_promisc > 0, ("%s: ic %p not promisc",
821 if (--ic->ic_promisc == 0)
822 ieee80211_runtask(ic, &ic->ic_promisc_task);
827 * Count number of vaps in allmulti, and issue allmulti on
828 * parent respectively.
831 ieee80211_allmulti(struct ieee80211vap *vap, bool on)
833 struct ieee80211com *ic = vap->iv_ic;
835 IEEE80211_LOCK_ASSERT(ic);
838 if (++ic->ic_allmulti == 1)
839 ieee80211_runtask(ic, &ic->ic_mcast_task);
841 KASSERT(ic->ic_allmulti > 0, ("%s: ic %p not allmulti",
843 if (--ic->ic_allmulti == 0)
844 ieee80211_runtask(ic, &ic->ic_mcast_task);
849 * Synchronize flag bit state in the com structure
850 * according to the state of all vap's. This is used,
851 * for example, to handle state changes via ioctls.
854 ieee80211_syncflag_locked(struct ieee80211com *ic, int flag)
856 struct ieee80211vap *vap;
859 IEEE80211_LOCK_ASSERT(ic);
862 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
863 if (vap->iv_flags & flag) {
868 ic->ic_flags |= flag;
870 ic->ic_flags &= ~flag;
874 ieee80211_syncflag(struct ieee80211vap *vap, int flag)
876 struct ieee80211com *ic = vap->iv_ic;
881 vap->iv_flags &= ~flag;
883 vap->iv_flags |= flag;
884 ieee80211_syncflag_locked(ic, flag);
885 IEEE80211_UNLOCK(ic);
889 * Synchronize flags_ht bit state in the com structure
890 * according to the state of all vap's. This is used,
891 * for example, to handle state changes via ioctls.
894 ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag)
896 struct ieee80211vap *vap;
899 IEEE80211_LOCK_ASSERT(ic);
902 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
903 if (vap->iv_flags_ht & flag) {
908 ic->ic_flags_ht |= flag;
910 ic->ic_flags_ht &= ~flag;
914 ieee80211_syncflag_ht(struct ieee80211vap *vap, int flag)
916 struct ieee80211com *ic = vap->iv_ic;
921 vap->iv_flags_ht &= ~flag;
923 vap->iv_flags_ht |= flag;
924 ieee80211_syncflag_ht_locked(ic, flag);
925 IEEE80211_UNLOCK(ic);
929 * Synchronize flags_vht bit state in the com structure
930 * according to the state of all vap's. This is used,
931 * for example, to handle state changes via ioctls.
934 ieee80211_syncflag_vht_locked(struct ieee80211com *ic, int flag)
936 struct ieee80211vap *vap;
939 IEEE80211_LOCK_ASSERT(ic);
942 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
943 if (vap->iv_flags_vht & flag) {
948 ic->ic_flags_vht |= flag;
950 ic->ic_flags_vht &= ~flag;
954 ieee80211_syncflag_vht(struct ieee80211vap *vap, int flag)
956 struct ieee80211com *ic = vap->iv_ic;
961 vap->iv_flags_vht &= ~flag;
963 vap->iv_flags_vht |= flag;
964 ieee80211_syncflag_vht_locked(ic, flag);
965 IEEE80211_UNLOCK(ic);
969 * Synchronize flags_ext bit state in the com structure
970 * according to the state of all vap's. This is used,
971 * for example, to handle state changes via ioctls.
974 ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag)
976 struct ieee80211vap *vap;
979 IEEE80211_LOCK_ASSERT(ic);
982 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
983 if (vap->iv_flags_ext & flag) {
988 ic->ic_flags_ext |= flag;
990 ic->ic_flags_ext &= ~flag;
994 ieee80211_syncflag_ext(struct ieee80211vap *vap, int flag)
996 struct ieee80211com *ic = vap->iv_ic;
1001 vap->iv_flags_ext &= ~flag;
1003 vap->iv_flags_ext |= flag;
1004 ieee80211_syncflag_ext_locked(ic, flag);
1005 IEEE80211_UNLOCK(ic);
1009 mapgsm(u_int freq, u_int flags)
1012 if (flags & IEEE80211_CHAN_QUARTER)
1014 else if (flags & IEEE80211_CHAN_HALF)
1018 /* NB: there is no 907/20 wide but leave room */
1019 return (freq - 906*10) / 5;
1023 mappsb(u_int freq, u_int flags)
1025 return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5;
1029 * Convert MHz frequency to IEEE channel number.
1032 ieee80211_mhz2ieee(u_int freq, u_int flags)
1034 #define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990)
1035 if (flags & IEEE80211_CHAN_GSM)
1036 return mapgsm(freq, flags);
1037 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
1041 return ((int) freq - 2407) / 5;
1043 return 15 + ((freq - 2512) / 20);
1044 } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */
1046 /* XXX check regdomain? */
1047 if (IS_FREQ_IN_PSB(freq))
1048 return mappsb(freq, flags);
1049 return (freq - 4000) / 5;
1051 return (freq - 5000) / 5;
1052 } else { /* either, guess */
1056 if (907 <= freq && freq <= 922)
1057 return mapgsm(freq, flags);
1058 return ((int) freq - 2407) / 5;
1061 if (IS_FREQ_IN_PSB(freq))
1062 return mappsb(freq, flags);
1063 else if (freq > 4900)
1064 return (freq - 4000) / 5;
1066 return 15 + ((freq - 2512) / 20);
1068 return (freq - 5000) / 5;
1070 #undef IS_FREQ_IN_PSB
1074 * Convert channel to IEEE channel number.
1077 ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c)
1080 ic_printf(ic, "invalid channel (NULL)\n");
1083 return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee);
1087 * Convert IEEE channel number to MHz frequency.
1090 ieee80211_ieee2mhz(u_int chan, u_int flags)
1092 if (flags & IEEE80211_CHAN_GSM)
1093 return 907 + 5 * (chan / 10);
1094 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
1098 return 2407 + chan*5;
1100 return 2512 + ((chan-15)*20);
1101 } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */
1102 if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) {
1104 return 4940 + chan*5 + (chan % 5 ? 2 : 0);
1106 return 5000 + (chan*5);
1107 } else { /* either, guess */
1108 /* XXX can't distinguish PSB+GSM channels */
1111 if (chan < 14) /* 0-13 */
1112 return 2407 + chan*5;
1113 if (chan < 27) /* 15-26 */
1114 return 2512 + ((chan-15)*20);
1115 return 5000 + (chan*5);
1119 static __inline void
1120 set_extchan(struct ieee80211_channel *c)
1124 * IEEE Std 802.11-2012, page 1738, subclause 20.3.15.4:
1125 * "the secondary channel number shall be 'N + [1,-1] * 4'
1127 if (c->ic_flags & IEEE80211_CHAN_HT40U)
1128 c->ic_extieee = c->ic_ieee + 4;
1129 else if (c->ic_flags & IEEE80211_CHAN_HT40D)
1130 c->ic_extieee = c->ic_ieee - 4;
1136 * Populate the freq1/freq2 fields as appropriate for VHT channels.
1138 * This for now uses a hard-coded list of 80MHz wide channels.
1140 * For HT20/HT40, freq1 just is the centre frequency of the 40MHz
1141 * wide channel we've already decided upon.
1143 * For VHT80 and VHT160, there are only a small number of fixed
1144 * 80/160MHz wide channels, so we just use those.
1146 * This is all likely very very wrong - both the regulatory code
1147 * and this code needs to ensure that all four channels are
1148 * available and valid before the VHT80 (and eight for VHT160) channel
1152 struct vht_chan_range {
1153 uint16_t freq_start;
1157 struct vht_chan_range vht80_chan_ranges[] = {
1168 set_vht_extchan(struct ieee80211_channel *c)
1172 if (! IEEE80211_IS_CHAN_VHT(c)) {
1176 if (IEEE80211_IS_CHAN_VHT20(c)) {
1177 c->ic_vht_ch_freq1 = c->ic_ieee;
1181 if (IEEE80211_IS_CHAN_VHT40(c)) {
1182 if (IEEE80211_IS_CHAN_HT40U(c))
1183 c->ic_vht_ch_freq1 = c->ic_ieee + 2;
1184 else if (IEEE80211_IS_CHAN_HT40D(c))
1185 c->ic_vht_ch_freq1 = c->ic_ieee - 2;
1191 if (IEEE80211_IS_CHAN_VHT80(c)) {
1192 for (i = 0; vht80_chan_ranges[i].freq_start != 0; i++) {
1193 if (c->ic_freq >= vht80_chan_ranges[i].freq_start &&
1194 c->ic_freq < vht80_chan_ranges[i].freq_end) {
1197 midpoint = vht80_chan_ranges[i].freq_start + 40;
1198 c->ic_vht_ch_freq1 =
1199 ieee80211_mhz2ieee(midpoint, c->ic_flags);
1200 c->ic_vht_ch_freq2 = 0;
1202 printf("%s: %d, freq=%d, midpoint=%d, freq1=%d, freq2=%d\n",
1203 __func__, c->ic_ieee, c->ic_freq, midpoint,
1204 c->ic_vht_ch_freq1, c->ic_vht_ch_freq2);
1212 printf("%s: unknown VHT channel type (ieee=%d, flags=0x%08x)\n",
1221 * Return whether the current channel could possibly be a part of
1224 * This doesn't check that the whole range is in the allowed list
1225 * according to regulatory.
1228 is_vht80_valid_freq(uint16_t freq)
1231 for (i = 0; vht80_chan_ranges[i].freq_start != 0; i++) {
1232 if (freq >= vht80_chan_ranges[i].freq_start &&
1233 freq < vht80_chan_ranges[i].freq_end)
1240 addchan(struct ieee80211_channel chans[], int maxchans, int *nchans,
1241 uint8_t ieee, uint16_t freq, int8_t maxregpower, uint32_t flags)
1243 struct ieee80211_channel *c;
1245 if (*nchans >= maxchans)
1249 printf("%s: %d: ieee=%d, freq=%d, flags=0x%08x\n",
1257 c = &chans[(*nchans)++];
1259 c->ic_freq = freq != 0 ? freq : ieee80211_ieee2mhz(ieee, flags);
1260 c->ic_maxregpower = maxregpower;
1261 c->ic_maxpower = 2 * maxregpower;
1262 c->ic_flags = flags;
1263 c->ic_vht_ch_freq1 = 0;
1264 c->ic_vht_ch_freq2 = 0;
1272 copychan_prev(struct ieee80211_channel chans[], int maxchans, int *nchans,
1275 struct ieee80211_channel *c;
1277 KASSERT(*nchans > 0, ("channel list is empty\n"));
1279 if (*nchans >= maxchans)
1283 printf("%s: %d: flags=0x%08x\n",
1289 c = &chans[(*nchans)++];
1291 c->ic_flags = flags;
1292 c->ic_vht_ch_freq1 = 0;
1293 c->ic_vht_ch_freq2 = 0;
1304 getflags_2ghz(const uint8_t bands[], uint32_t flags[], int ht40)
1309 if (isset(bands, IEEE80211_MODE_11B))
1310 flags[nmodes++] = IEEE80211_CHAN_B;
1311 if (isset(bands, IEEE80211_MODE_11G))
1312 flags[nmodes++] = IEEE80211_CHAN_G;
1313 if (isset(bands, IEEE80211_MODE_11NG))
1314 flags[nmodes++] = IEEE80211_CHAN_G | IEEE80211_CHAN_HT20;
1316 flags[nmodes++] = IEEE80211_CHAN_G | IEEE80211_CHAN_HT40U;
1317 flags[nmodes++] = IEEE80211_CHAN_G | IEEE80211_CHAN_HT40D;
1323 getflags_5ghz(const uint8_t bands[], uint32_t flags[], int ht40, int vht80)
1328 * the addchan_list function seems to expect the flags array to
1329 * be in channel width order, so the VHT bits are interspersed
1330 * as appropriate to maintain said order.
1332 * It also assumes HT40U is before HT40D.
1337 if (isset(bands, IEEE80211_MODE_11A))
1338 flags[nmodes++] = IEEE80211_CHAN_A;
1339 if (isset(bands, IEEE80211_MODE_11NA))
1340 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT20;
1341 if (isset(bands, IEEE80211_MODE_VHT_5GHZ)) {
1342 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT20 |
1343 IEEE80211_CHAN_VHT20;
1348 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT40U;
1350 if (ht40 && isset(bands, IEEE80211_MODE_VHT_5GHZ)) {
1351 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT40U
1352 | IEEE80211_CHAN_VHT40U;
1355 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT40D;
1357 if (ht40 && isset(bands, IEEE80211_MODE_VHT_5GHZ)) {
1358 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT40D
1359 | IEEE80211_CHAN_VHT40D;
1363 if (vht80 && isset(bands, IEEE80211_MODE_VHT_5GHZ)) {
1364 flags[nmodes++] = IEEE80211_CHAN_A |
1365 IEEE80211_CHAN_HT40U | IEEE80211_CHAN_VHT80;
1366 flags[nmodes++] = IEEE80211_CHAN_A |
1367 IEEE80211_CHAN_HT40D | IEEE80211_CHAN_VHT80;
1376 getflags(const uint8_t bands[], uint32_t flags[], int ht40, int vht80)
1380 if (isset(bands, IEEE80211_MODE_11A) ||
1381 isset(bands, IEEE80211_MODE_11NA) ||
1382 isset(bands, IEEE80211_MODE_VHT_5GHZ)) {
1383 if (isset(bands, IEEE80211_MODE_11B) ||
1384 isset(bands, IEEE80211_MODE_11G) ||
1385 isset(bands, IEEE80211_MODE_11NG) ||
1386 isset(bands, IEEE80211_MODE_VHT_2GHZ))
1389 getflags_5ghz(bands, flags, ht40, vht80);
1391 getflags_2ghz(bands, flags, ht40);
1395 * Add one 20 MHz channel into specified channel list.
1396 * You MUST NOT mix bands when calling this. It will not add 5ghz
1397 * channels if you have any B/G/N band bit set.
1401 ieee80211_add_channel(struct ieee80211_channel chans[], int maxchans,
1402 int *nchans, uint8_t ieee, uint16_t freq, int8_t maxregpower,
1403 uint32_t chan_flags, const uint8_t bands[])
1405 uint32_t flags[IEEE80211_MODE_MAX];
1408 getflags(bands, flags, 0, 0);
1409 KASSERT(flags[0] != 0, ("%s: no correct mode provided\n", __func__));
1411 error = addchan(chans, maxchans, nchans, ieee, freq, maxregpower,
1412 flags[0] | chan_flags);
1413 for (i = 1; flags[i] != 0 && error == 0; i++) {
1414 error = copychan_prev(chans, maxchans, nchans,
1415 flags[i] | chan_flags);
1421 static struct ieee80211_channel *
1422 findchannel(struct ieee80211_channel chans[], int nchans, uint16_t freq,
1425 struct ieee80211_channel *c;
1428 flags &= IEEE80211_CHAN_ALLTURBO;
1429 /* brute force search */
1430 for (i = 0; i < nchans; i++) {
1432 if (c->ic_freq == freq &&
1433 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
1440 * Add 40 MHz channel pair into specified channel list.
1444 ieee80211_add_channel_ht40(struct ieee80211_channel chans[], int maxchans,
1445 int *nchans, uint8_t ieee, int8_t maxregpower, uint32_t flags)
1447 struct ieee80211_channel *cent, *extc;
1451 freq = ieee80211_ieee2mhz(ieee, flags);
1454 * Each entry defines an HT40 channel pair; find the
1455 * center channel, then the extension channel above.
1457 flags |= IEEE80211_CHAN_HT20;
1458 cent = findchannel(chans, *nchans, freq, flags);
1462 extc = findchannel(chans, *nchans, freq + 20, flags);
1466 flags &= ~IEEE80211_CHAN_HT;
1467 error = addchan(chans, maxchans, nchans, cent->ic_ieee, cent->ic_freq,
1468 maxregpower, flags | IEEE80211_CHAN_HT40U);
1472 error = addchan(chans, maxchans, nchans, extc->ic_ieee, extc->ic_freq,
1473 maxregpower, flags | IEEE80211_CHAN_HT40D);
1479 * Fetch the center frequency for the primary channel.
1482 ieee80211_get_channel_center_freq(const struct ieee80211_channel *c)
1485 return (c->ic_freq);
1489 * Fetch the center frequency for the primary BAND channel.
1491 * For 5, 10, 20MHz channels it'll be the normally configured channel
1494 * For 40MHz, 80MHz, 160Mhz channels it'll the the centre of the
1495 * wide channel, not the centre of the primary channel (that's ic_freq).
1497 * For 80+80MHz channels this will be the centre of the primary
1498 * 80MHz channel; the secondary 80MHz channel will be center_freq2().
1501 ieee80211_get_channel_center_freq1(const struct ieee80211_channel *c)
1505 * VHT - use the pre-calculated centre frequency
1506 * of the given channel.
1508 if (IEEE80211_IS_CHAN_VHT(c))
1509 return (ieee80211_ieee2mhz(c->ic_vht_ch_freq1, c->ic_flags));
1511 if (IEEE80211_IS_CHAN_HT40U(c)) {
1512 return (c->ic_freq + 10);
1514 if (IEEE80211_IS_CHAN_HT40D(c)) {
1515 return (c->ic_freq - 10);
1518 return (c->ic_freq);
1522 * For now, no 80+80 support; it will likely always return 0.
1525 ieee80211_get_channel_center_freq2(const struct ieee80211_channel *c)
1528 if (IEEE80211_IS_CHAN_VHT(c) && (c->ic_vht_ch_freq2 != 0))
1529 return (ieee80211_ieee2mhz(c->ic_vht_ch_freq2, c->ic_flags));
1535 * Adds channels into specified channel list (ieee[] array must be sorted).
1536 * Channels are already sorted.
1539 add_chanlist(struct ieee80211_channel chans[], int maxchans, int *nchans,
1540 const uint8_t ieee[], int nieee, uint32_t flags[])
1546 for (i = 0; i < nieee; i++) {
1547 freq = ieee80211_ieee2mhz(ieee[i], flags[0]);
1548 for (j = 0; flags[j] != 0; j++) {
1551 * + HT40 and VHT40 channels occur together, so
1552 * we need to be careful that we actually allow that.
1553 * + VHT80, VHT160 will coexist with HT40/VHT40, so
1554 * make sure it's not skipped because of the overlap
1555 * check used for (V)HT40.
1557 is_vht = !! (flags[j] & IEEE80211_CHAN_VHT);
1561 * XXX This is all very broken right now.
1562 * What we /should/ do is:
1564 * + check that the frequency is in the list of
1565 * allowed VHT80 ranges; and
1566 * + the other 3 channels in the list are actually
1569 if (is_vht && flags[j] & IEEE80211_CHAN_VHT80)
1570 if (! is_vht80_valid_freq(freq))
1576 * This is also a fall through from VHT80; as we only
1577 * allow a VHT80 channel if the VHT40 combination is
1578 * also valid. If the VHT40 form is not valid then
1579 * we certainly can't do VHT80..
1581 if (flags[j] & IEEE80211_CHAN_HT40D)
1583 * Can't have a "lower" channel if we are the
1586 * Can't have a "lower" channel if it's below/
1587 * within 20MHz of the first channel.
1589 * Can't have a "lower" channel if the channel
1590 * below it is not 20MHz away.
1592 if (i == 0 || ieee[i] < ieee[0] + 4 ||
1594 ieee80211_ieee2mhz(ieee[i] - 4, flags[j]))
1596 if (flags[j] & IEEE80211_CHAN_HT40U)
1598 * Can't have an "upper" channel if we are
1601 * Can't have an "upper" channel be above the
1602 * last channel in the list.
1604 * Can't have an "upper" channel if the next
1605 * channel according to the math isn't 20MHz
1606 * away. (Likely for channel 13/14.)
1608 if (i == nieee - 1 ||
1609 ieee[i] + 4 > ieee[nieee - 1] ||
1611 ieee80211_ieee2mhz(ieee[i] + 4, flags[j]))
1615 error = addchan(chans, maxchans, nchans,
1616 ieee[i], freq, 0, flags[j]);
1618 error = copychan_prev(chans, maxchans, nchans,
1630 ieee80211_add_channel_list_2ghz(struct ieee80211_channel chans[], int maxchans,
1631 int *nchans, const uint8_t ieee[], int nieee, const uint8_t bands[],
1634 uint32_t flags[IEEE80211_MODE_MAX];
1636 /* XXX no VHT for now */
1637 getflags_2ghz(bands, flags, ht40);
1638 KASSERT(flags[0] != 0, ("%s: no correct mode provided\n", __func__));
1640 return (add_chanlist(chans, maxchans, nchans, ieee, nieee, flags));
1644 ieee80211_add_channels_default_2ghz(struct ieee80211_channel chans[],
1645 int maxchans, int *nchans, const uint8_t bands[], int ht40)
1647 const uint8_t default_chan_list[] =
1648 { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 };
1650 return (ieee80211_add_channel_list_2ghz(chans, maxchans, nchans,
1651 default_chan_list, nitems(default_chan_list), bands, ht40));
1655 ieee80211_add_channel_list_5ghz(struct ieee80211_channel chans[], int maxchans,
1656 int *nchans, const uint8_t ieee[], int nieee, const uint8_t bands[],
1659 uint32_t flags[IEEE80211_MODE_MAX];
1663 * For now, assume VHT == VHT80 support as a minimum.
1665 if (isset(bands, IEEE80211_MODE_VHT_5GHZ))
1668 getflags_5ghz(bands, flags, ht40, vht80);
1669 KASSERT(flags[0] != 0, ("%s: no correct mode provided\n", __func__));
1671 return (add_chanlist(chans, maxchans, nchans, ieee, nieee, flags));
1675 * Locate a channel given a frequency+flags. We cache
1676 * the previous lookup to optimize switching between two
1677 * channels--as happens with dynamic turbo.
1679 struct ieee80211_channel *
1680 ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags)
1682 struct ieee80211_channel *c;
1684 flags &= IEEE80211_CHAN_ALLTURBO;
1685 c = ic->ic_prevchan;
1686 if (c != NULL && c->ic_freq == freq &&
1687 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
1689 /* brute force search */
1690 return (findchannel(ic->ic_channels, ic->ic_nchans, freq, flags));
1694 * Locate a channel given a channel number+flags. We cache
1695 * the previous lookup to optimize switching between two
1696 * channels--as happens with dynamic turbo.
1698 struct ieee80211_channel *
1699 ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags)
1701 struct ieee80211_channel *c;
1704 flags &= IEEE80211_CHAN_ALLTURBO;
1705 c = ic->ic_prevchan;
1706 if (c != NULL && c->ic_ieee == ieee &&
1707 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
1709 /* brute force search */
1710 for (i = 0; i < ic->ic_nchans; i++) {
1711 c = &ic->ic_channels[i];
1712 if (c->ic_ieee == ieee &&
1713 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
1720 * Lookup a channel suitable for the given rx status.
1722 * This is used to find a channel for a frame (eg beacon, probe
1723 * response) based purely on the received PHY information.
1725 * For now it tries to do it based on R_FREQ / R_IEEE.
1726 * This is enough for 11bg and 11a (and thus 11ng/11na)
1727 * but it will not be enough for GSM, PSB channels and the
1728 * like. It also doesn't know about legacy-turbog and
1729 * legacy-turbo modes, which some offload NICs actually
1730 * support in weird ways.
1732 * Takes the ic and rxstatus; returns the channel or NULL
1735 * XXX TODO: Add support for that when the need arises.
1737 struct ieee80211_channel *
1738 ieee80211_lookup_channel_rxstatus(struct ieee80211vap *vap,
1739 const struct ieee80211_rx_stats *rxs)
1741 struct ieee80211com *ic = vap->iv_ic;
1743 struct ieee80211_channel *c;
1749 * Strictly speaking we only use freq for now,
1750 * however later on we may wish to just store
1751 * the ieee for verification.
1753 if ((rxs->r_flags & IEEE80211_R_FREQ) == 0)
1755 if ((rxs->r_flags & IEEE80211_R_IEEE) == 0)
1759 * If the rx status contains a valid ieee/freq, then
1760 * ensure we populate the correct channel information
1761 * in rxchan before passing it up to the scan infrastructure.
1762 * Offload NICs will pass up beacons from all channels
1763 * during background scans.
1766 /* Determine a band */
1767 /* XXX should be done by the driver? */
1768 if (rxs->c_freq < 3000) {
1769 flags = IEEE80211_CHAN_G;
1771 flags = IEEE80211_CHAN_A;
1774 /* Channel lookup */
1775 c = ieee80211_find_channel(ic, rxs->c_freq, flags);
1777 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INPUT,
1778 "%s: freq=%d, ieee=%d, flags=0x%08x; c=%p\n",
1789 addmedia(struct ifmedia *media, int caps, int addsta, int mode, int mword)
1791 #define ADD(_ic, _s, _o) \
1792 ifmedia_add(media, \
1793 IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL)
1794 static const u_int mopts[IEEE80211_MODE_MAX] = {
1795 [IEEE80211_MODE_AUTO] = IFM_AUTO,
1796 [IEEE80211_MODE_11A] = IFM_IEEE80211_11A,
1797 [IEEE80211_MODE_11B] = IFM_IEEE80211_11B,
1798 [IEEE80211_MODE_11G] = IFM_IEEE80211_11G,
1799 [IEEE80211_MODE_FH] = IFM_IEEE80211_FH,
1800 [IEEE80211_MODE_TURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO,
1801 [IEEE80211_MODE_TURBO_G] = IFM_IEEE80211_11G|IFM_IEEE80211_TURBO,
1802 [IEEE80211_MODE_STURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO,
1803 [IEEE80211_MODE_HALF] = IFM_IEEE80211_11A, /* XXX */
1804 [IEEE80211_MODE_QUARTER] = IFM_IEEE80211_11A, /* XXX */
1805 [IEEE80211_MODE_11NA] = IFM_IEEE80211_11NA,
1806 [IEEE80211_MODE_11NG] = IFM_IEEE80211_11NG,
1807 [IEEE80211_MODE_VHT_2GHZ] = IFM_IEEE80211_VHT2G,
1808 [IEEE80211_MODE_VHT_5GHZ] = IFM_IEEE80211_VHT5G,
1814 ADD(ic, mword, mopt); /* STA mode has no cap */
1815 if (caps & IEEE80211_C_IBSS)
1816 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC);
1817 if (caps & IEEE80211_C_HOSTAP)
1818 ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP);
1819 if (caps & IEEE80211_C_AHDEMO)
1820 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0);
1821 if (caps & IEEE80211_C_MONITOR)
1822 ADD(media, mword, mopt | IFM_IEEE80211_MONITOR);
1823 if (caps & IEEE80211_C_WDS)
1824 ADD(media, mword, mopt | IFM_IEEE80211_WDS);
1825 if (caps & IEEE80211_C_MBSS)
1826 ADD(media, mword, mopt | IFM_IEEE80211_MBSS);
1831 * Setup the media data structures according to the channel and
1835 ieee80211_media_setup(struct ieee80211com *ic,
1836 struct ifmedia *media, int caps, int addsta,
1837 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat)
1839 int i, j, rate, maxrate, mword, r;
1840 enum ieee80211_phymode mode;
1841 const struct ieee80211_rateset *rs;
1842 struct ieee80211_rateset allrates;
1845 * Fill in media characteristics.
1847 ifmedia_init(media, 0, media_change, media_stat);
1850 * Add media for legacy operating modes.
1852 memset(&allrates, 0, sizeof(allrates));
1853 for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) {
1854 if (isclr(ic->ic_modecaps, mode))
1856 addmedia(media, caps, addsta, mode, IFM_AUTO);
1857 if (mode == IEEE80211_MODE_AUTO)
1859 rs = &ic->ic_sup_rates[mode];
1860 for (i = 0; i < rs->rs_nrates; i++) {
1861 rate = rs->rs_rates[i];
1862 mword = ieee80211_rate2media(ic, rate, mode);
1865 addmedia(media, caps, addsta, mode, mword);
1867 * Add legacy rate to the collection of all rates.
1869 r = rate & IEEE80211_RATE_VAL;
1870 for (j = 0; j < allrates.rs_nrates; j++)
1871 if (allrates.rs_rates[j] == r)
1873 if (j == allrates.rs_nrates) {
1874 /* unique, add to the set */
1875 allrates.rs_rates[j] = r;
1876 allrates.rs_nrates++;
1878 rate = (rate & IEEE80211_RATE_VAL) / 2;
1883 for (i = 0; i < allrates.rs_nrates; i++) {
1884 mword = ieee80211_rate2media(ic, allrates.rs_rates[i],
1885 IEEE80211_MODE_AUTO);
1888 /* NB: remove media options from mword */
1889 addmedia(media, caps, addsta,
1890 IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword));
1893 * Add HT/11n media. Note that we do not have enough
1894 * bits in the media subtype to express the MCS so we
1895 * use a "placeholder" media subtype and any fixed MCS
1896 * must be specified with a different mechanism.
1898 for (; mode <= IEEE80211_MODE_11NG; mode++) {
1899 if (isclr(ic->ic_modecaps, mode))
1901 addmedia(media, caps, addsta, mode, IFM_AUTO);
1902 addmedia(media, caps, addsta, mode, IFM_IEEE80211_MCS);
1904 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) ||
1905 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) {
1906 addmedia(media, caps, addsta,
1907 IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS);
1908 i = ic->ic_txstream * 8 - 1;
1909 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) &&
1910 (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI40))
1911 rate = ieee80211_htrates[i].ht40_rate_400ns;
1912 else if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40))
1913 rate = ieee80211_htrates[i].ht40_rate_800ns;
1914 else if ((ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI20))
1915 rate = ieee80211_htrates[i].ht20_rate_400ns;
1917 rate = ieee80211_htrates[i].ht20_rate_800ns;
1925 for (; mode <= IEEE80211_MODE_VHT_5GHZ; mode++) {
1926 if (isclr(ic->ic_modecaps, mode))
1928 addmedia(media, caps, addsta, mode, IFM_AUTO);
1929 addmedia(media, caps, addsta, mode, IFM_IEEE80211_VHT);
1931 /* XXX TODO: VHT maxrate */
1937 /* XXX inline or eliminate? */
1938 const struct ieee80211_rateset *
1939 ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c)
1941 /* XXX does this work for 11ng basic rates? */
1942 return &ic->ic_sup_rates[ieee80211_chan2mode(c)];
1945 /* XXX inline or eliminate? */
1946 const struct ieee80211_htrateset *
1947 ieee80211_get_suphtrates(struct ieee80211com *ic,
1948 const struct ieee80211_channel *c)
1950 return &ic->ic_sup_htrates;
1954 ieee80211_announce(struct ieee80211com *ic)
1957 enum ieee80211_phymode mode;
1958 const struct ieee80211_rateset *rs;
1960 /* NB: skip AUTO since it has no rates */
1961 for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) {
1962 if (isclr(ic->ic_modecaps, mode))
1964 ic_printf(ic, "%s rates: ", ieee80211_phymode_name[mode]);
1965 rs = &ic->ic_sup_rates[mode];
1966 for (i = 0; i < rs->rs_nrates; i++) {
1967 mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode);
1970 rate = ieee80211_media2rate(mword);
1971 printf("%s%d%sMbps", (i != 0 ? " " : ""),
1972 rate / 2, ((rate & 0x1) != 0 ? ".5" : ""));
1976 ieee80211_ht_announce(ic);
1977 ieee80211_vht_announce(ic);
1981 ieee80211_announce_channels(struct ieee80211com *ic)
1983 const struct ieee80211_channel *c;
1987 printf("Chan Freq CW RegPwr MinPwr MaxPwr\n");
1988 for (i = 0; i < ic->ic_nchans; i++) {
1989 c = &ic->ic_channels[i];
1990 if (IEEE80211_IS_CHAN_ST(c))
1992 else if (IEEE80211_IS_CHAN_108A(c))
1994 else if (IEEE80211_IS_CHAN_108G(c))
1996 else if (IEEE80211_IS_CHAN_HT(c))
1998 else if (IEEE80211_IS_CHAN_A(c))
2000 else if (IEEE80211_IS_CHAN_ANYG(c))
2002 else if (IEEE80211_IS_CHAN_B(c))
2006 if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c))
2008 else if (IEEE80211_IS_CHAN_HALF(c))
2010 else if (IEEE80211_IS_CHAN_QUARTER(c))
2014 printf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n"
2015 , c->ic_ieee, c->ic_freq, type
2017 , IEEE80211_IS_CHAN_HT40U(c) ? '+' :
2018 IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' '
2020 , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0
2021 , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0
2027 media2mode(const struct ifmedia_entry *ime, uint32_t flags, uint16_t *mode)
2029 switch (IFM_MODE(ime->ifm_media)) {
2030 case IFM_IEEE80211_11A:
2031 *mode = IEEE80211_MODE_11A;
2033 case IFM_IEEE80211_11B:
2034 *mode = IEEE80211_MODE_11B;
2036 case IFM_IEEE80211_11G:
2037 *mode = IEEE80211_MODE_11G;
2039 case IFM_IEEE80211_FH:
2040 *mode = IEEE80211_MODE_FH;
2042 case IFM_IEEE80211_11NA:
2043 *mode = IEEE80211_MODE_11NA;
2045 case IFM_IEEE80211_11NG:
2046 *mode = IEEE80211_MODE_11NG;
2049 *mode = IEEE80211_MODE_AUTO;
2055 * Turbo mode is an ``option''.
2056 * XXX does not apply to AUTO
2058 if (ime->ifm_media & IFM_IEEE80211_TURBO) {
2059 if (*mode == IEEE80211_MODE_11A) {
2060 if (flags & IEEE80211_F_TURBOP)
2061 *mode = IEEE80211_MODE_TURBO_A;
2063 *mode = IEEE80211_MODE_STURBO_A;
2064 } else if (*mode == IEEE80211_MODE_11G)
2065 *mode = IEEE80211_MODE_TURBO_G;
2074 * Handle a media change request on the vap interface.
2077 ieee80211_media_change(struct ifnet *ifp)
2079 struct ieee80211vap *vap = ifp->if_softc;
2080 struct ifmedia_entry *ime = vap->iv_media.ifm_cur;
2083 if (!media2mode(ime, vap->iv_flags, &newmode))
2085 if (vap->iv_des_mode != newmode) {
2086 vap->iv_des_mode = newmode;
2087 /* XXX kick state machine if up+running */
2093 * Common code to calculate the media status word
2094 * from the operating mode and channel state.
2097 media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan)
2101 status = IFM_IEEE80211;
2103 case IEEE80211_M_STA:
2105 case IEEE80211_M_IBSS:
2106 status |= IFM_IEEE80211_ADHOC;
2108 case IEEE80211_M_HOSTAP:
2109 status |= IFM_IEEE80211_HOSTAP;
2111 case IEEE80211_M_MONITOR:
2112 status |= IFM_IEEE80211_MONITOR;
2114 case IEEE80211_M_AHDEMO:
2115 status |= IFM_IEEE80211_ADHOC | IFM_FLAG0;
2117 case IEEE80211_M_WDS:
2118 status |= IFM_IEEE80211_WDS;
2120 case IEEE80211_M_MBSS:
2121 status |= IFM_IEEE80211_MBSS;
2124 if (IEEE80211_IS_CHAN_HTA(chan)) {
2125 status |= IFM_IEEE80211_11NA;
2126 } else if (IEEE80211_IS_CHAN_HTG(chan)) {
2127 status |= IFM_IEEE80211_11NG;
2128 } else if (IEEE80211_IS_CHAN_A(chan)) {
2129 status |= IFM_IEEE80211_11A;
2130 } else if (IEEE80211_IS_CHAN_B(chan)) {
2131 status |= IFM_IEEE80211_11B;
2132 } else if (IEEE80211_IS_CHAN_ANYG(chan)) {
2133 status |= IFM_IEEE80211_11G;
2134 } else if (IEEE80211_IS_CHAN_FHSS(chan)) {
2135 status |= IFM_IEEE80211_FH;
2137 /* XXX else complain? */
2139 if (IEEE80211_IS_CHAN_TURBO(chan))
2140 status |= IFM_IEEE80211_TURBO;
2142 if (IEEE80211_IS_CHAN_HT20(chan))
2143 status |= IFM_IEEE80211_HT20;
2144 if (IEEE80211_IS_CHAN_HT40(chan))
2145 status |= IFM_IEEE80211_HT40;
2151 ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr)
2153 struct ieee80211vap *vap = ifp->if_softc;
2154 struct ieee80211com *ic = vap->iv_ic;
2155 enum ieee80211_phymode mode;
2157 imr->ifm_status = IFM_AVALID;
2159 * NB: use the current channel's mode to lock down a xmit
2160 * rate only when running; otherwise we may have a mismatch
2161 * in which case the rate will not be convertible.
2163 if (vap->iv_state == IEEE80211_S_RUN ||
2164 vap->iv_state == IEEE80211_S_SLEEP) {
2165 imr->ifm_status |= IFM_ACTIVE;
2166 mode = ieee80211_chan2mode(ic->ic_curchan);
2168 mode = IEEE80211_MODE_AUTO;
2169 imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan);
2171 * Calculate a current rate if possible.
2173 if (vap->iv_txparms[mode].ucastrate != IEEE80211_FIXED_RATE_NONE) {
2175 * A fixed rate is set, report that.
2177 imr->ifm_active |= ieee80211_rate2media(ic,
2178 vap->iv_txparms[mode].ucastrate, mode);
2179 } else if (vap->iv_opmode == IEEE80211_M_STA) {
2181 * In station mode report the current transmit rate.
2183 imr->ifm_active |= ieee80211_rate2media(ic,
2184 vap->iv_bss->ni_txrate, mode);
2186 imr->ifm_active |= IFM_AUTO;
2187 if (imr->ifm_status & IFM_ACTIVE)
2188 imr->ifm_current = imr->ifm_active;
2192 * Set the current phy mode and recalculate the active channel
2193 * set based on the available channels for this mode. Also
2194 * select a new default/current channel if the current one is
2195 * inappropriate for this mode.
2198 ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode)
2201 * Adjust basic rates in 11b/11g supported rate set.
2202 * Note that if operating on a hal/quarter rate channel
2203 * this is a noop as those rates sets are different
2206 if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B)
2207 ieee80211_setbasicrates(&ic->ic_sup_rates[mode], mode);
2209 ic->ic_curmode = mode;
2210 ieee80211_reset_erp(ic); /* reset global ERP state */
2216 * Return the phy mode for with the specified channel.
2218 enum ieee80211_phymode
2219 ieee80211_chan2mode(const struct ieee80211_channel *chan)
2222 if (IEEE80211_IS_CHAN_VHT_2GHZ(chan))
2223 return IEEE80211_MODE_VHT_2GHZ;
2224 else if (IEEE80211_IS_CHAN_VHT_5GHZ(chan))
2225 return IEEE80211_MODE_VHT_5GHZ;
2226 else if (IEEE80211_IS_CHAN_HTA(chan))
2227 return IEEE80211_MODE_11NA;
2228 else if (IEEE80211_IS_CHAN_HTG(chan))
2229 return IEEE80211_MODE_11NG;
2230 else if (IEEE80211_IS_CHAN_108G(chan))
2231 return IEEE80211_MODE_TURBO_G;
2232 else if (IEEE80211_IS_CHAN_ST(chan))
2233 return IEEE80211_MODE_STURBO_A;
2234 else if (IEEE80211_IS_CHAN_TURBO(chan))
2235 return IEEE80211_MODE_TURBO_A;
2236 else if (IEEE80211_IS_CHAN_HALF(chan))
2237 return IEEE80211_MODE_HALF;
2238 else if (IEEE80211_IS_CHAN_QUARTER(chan))
2239 return IEEE80211_MODE_QUARTER;
2240 else if (IEEE80211_IS_CHAN_A(chan))
2241 return IEEE80211_MODE_11A;
2242 else if (IEEE80211_IS_CHAN_ANYG(chan))
2243 return IEEE80211_MODE_11G;
2244 else if (IEEE80211_IS_CHAN_B(chan))
2245 return IEEE80211_MODE_11B;
2246 else if (IEEE80211_IS_CHAN_FHSS(chan))
2247 return IEEE80211_MODE_FH;
2249 /* NB: should not get here */
2250 printf("%s: cannot map channel to mode; freq %u flags 0x%x\n",
2251 __func__, chan->ic_freq, chan->ic_flags);
2252 return IEEE80211_MODE_11B;
2256 u_int match; /* rate + mode */
2257 u_int media; /* if_media rate */
2261 findmedia(const struct ratemedia rates[], int n, u_int match)
2265 for (i = 0; i < n; i++)
2266 if (rates[i].match == match)
2267 return rates[i].media;
2272 * Convert IEEE80211 rate value to ifmedia subtype.
2273 * Rate is either a legacy rate in units of 0.5Mbps
2277 ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode)
2279 static const struct ratemedia rates[] = {
2280 { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 },
2281 { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 },
2282 { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 },
2283 { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 },
2284 { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 },
2285 { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 },
2286 { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 },
2287 { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 },
2288 { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 },
2289 { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 },
2290 { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 },
2291 { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 },
2292 { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 },
2293 { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 },
2294 { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 },
2295 { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 },
2296 { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 },
2297 { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 },
2298 { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 },
2299 { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 },
2300 { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 },
2301 { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 },
2302 { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 },
2303 { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 },
2304 { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 },
2305 { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 },
2306 { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 },
2307 { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 },
2308 { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 },
2309 { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 },
2310 /* NB: OFDM72 doesn't really exist so we don't handle it */
2312 static const struct ratemedia htrates[] = {
2313 { 0, IFM_IEEE80211_MCS },
2314 { 1, IFM_IEEE80211_MCS },
2315 { 2, IFM_IEEE80211_MCS },
2316 { 3, IFM_IEEE80211_MCS },
2317 { 4, IFM_IEEE80211_MCS },
2318 { 5, IFM_IEEE80211_MCS },
2319 { 6, IFM_IEEE80211_MCS },
2320 { 7, IFM_IEEE80211_MCS },
2321 { 8, IFM_IEEE80211_MCS },
2322 { 9, IFM_IEEE80211_MCS },
2323 { 10, IFM_IEEE80211_MCS },
2324 { 11, IFM_IEEE80211_MCS },
2325 { 12, IFM_IEEE80211_MCS },
2326 { 13, IFM_IEEE80211_MCS },
2327 { 14, IFM_IEEE80211_MCS },
2328 { 15, IFM_IEEE80211_MCS },
2329 { 16, IFM_IEEE80211_MCS },
2330 { 17, IFM_IEEE80211_MCS },
2331 { 18, IFM_IEEE80211_MCS },
2332 { 19, IFM_IEEE80211_MCS },
2333 { 20, IFM_IEEE80211_MCS },
2334 { 21, IFM_IEEE80211_MCS },
2335 { 22, IFM_IEEE80211_MCS },
2336 { 23, IFM_IEEE80211_MCS },
2337 { 24, IFM_IEEE80211_MCS },
2338 { 25, IFM_IEEE80211_MCS },
2339 { 26, IFM_IEEE80211_MCS },
2340 { 27, IFM_IEEE80211_MCS },
2341 { 28, IFM_IEEE80211_MCS },
2342 { 29, IFM_IEEE80211_MCS },
2343 { 30, IFM_IEEE80211_MCS },
2344 { 31, IFM_IEEE80211_MCS },
2345 { 32, IFM_IEEE80211_MCS },
2346 { 33, IFM_IEEE80211_MCS },
2347 { 34, IFM_IEEE80211_MCS },
2348 { 35, IFM_IEEE80211_MCS },
2349 { 36, IFM_IEEE80211_MCS },
2350 { 37, IFM_IEEE80211_MCS },
2351 { 38, IFM_IEEE80211_MCS },
2352 { 39, IFM_IEEE80211_MCS },
2353 { 40, IFM_IEEE80211_MCS },
2354 { 41, IFM_IEEE80211_MCS },
2355 { 42, IFM_IEEE80211_MCS },
2356 { 43, IFM_IEEE80211_MCS },
2357 { 44, IFM_IEEE80211_MCS },
2358 { 45, IFM_IEEE80211_MCS },
2359 { 46, IFM_IEEE80211_MCS },
2360 { 47, IFM_IEEE80211_MCS },
2361 { 48, IFM_IEEE80211_MCS },
2362 { 49, IFM_IEEE80211_MCS },
2363 { 50, IFM_IEEE80211_MCS },
2364 { 51, IFM_IEEE80211_MCS },
2365 { 52, IFM_IEEE80211_MCS },
2366 { 53, IFM_IEEE80211_MCS },
2367 { 54, IFM_IEEE80211_MCS },
2368 { 55, IFM_IEEE80211_MCS },
2369 { 56, IFM_IEEE80211_MCS },
2370 { 57, IFM_IEEE80211_MCS },
2371 { 58, IFM_IEEE80211_MCS },
2372 { 59, IFM_IEEE80211_MCS },
2373 { 60, IFM_IEEE80211_MCS },
2374 { 61, IFM_IEEE80211_MCS },
2375 { 62, IFM_IEEE80211_MCS },
2376 { 63, IFM_IEEE80211_MCS },
2377 { 64, IFM_IEEE80211_MCS },
2378 { 65, IFM_IEEE80211_MCS },
2379 { 66, IFM_IEEE80211_MCS },
2380 { 67, IFM_IEEE80211_MCS },
2381 { 68, IFM_IEEE80211_MCS },
2382 { 69, IFM_IEEE80211_MCS },
2383 { 70, IFM_IEEE80211_MCS },
2384 { 71, IFM_IEEE80211_MCS },
2385 { 72, IFM_IEEE80211_MCS },
2386 { 73, IFM_IEEE80211_MCS },
2387 { 74, IFM_IEEE80211_MCS },
2388 { 75, IFM_IEEE80211_MCS },
2389 { 76, IFM_IEEE80211_MCS },
2394 * Check 11n rates first for match as an MCS.
2396 if (mode == IEEE80211_MODE_11NA) {
2397 if (rate & IEEE80211_RATE_MCS) {
2398 rate &= ~IEEE80211_RATE_MCS;
2399 m = findmedia(htrates, nitems(htrates), rate);
2401 return m | IFM_IEEE80211_11NA;
2403 } else if (mode == IEEE80211_MODE_11NG) {
2404 /* NB: 12 is ambiguous, it will be treated as an MCS */
2405 if (rate & IEEE80211_RATE_MCS) {
2406 rate &= ~IEEE80211_RATE_MCS;
2407 m = findmedia(htrates, nitems(htrates), rate);
2409 return m | IFM_IEEE80211_11NG;
2412 rate &= IEEE80211_RATE_VAL;
2414 case IEEE80211_MODE_11A:
2415 case IEEE80211_MODE_HALF: /* XXX good 'nuf */
2416 case IEEE80211_MODE_QUARTER:
2417 case IEEE80211_MODE_11NA:
2418 case IEEE80211_MODE_TURBO_A:
2419 case IEEE80211_MODE_STURBO_A:
2420 return findmedia(rates, nitems(rates),
2421 rate | IFM_IEEE80211_11A);
2422 case IEEE80211_MODE_11B:
2423 return findmedia(rates, nitems(rates),
2424 rate | IFM_IEEE80211_11B);
2425 case IEEE80211_MODE_FH:
2426 return findmedia(rates, nitems(rates),
2427 rate | IFM_IEEE80211_FH);
2428 case IEEE80211_MODE_AUTO:
2429 /* NB: ic may be NULL for some drivers */
2430 if (ic != NULL && ic->ic_phytype == IEEE80211_T_FH)
2431 return findmedia(rates, nitems(rates),
2432 rate | IFM_IEEE80211_FH);
2433 /* NB: hack, 11g matches both 11b+11a rates */
2435 case IEEE80211_MODE_11G:
2436 case IEEE80211_MODE_11NG:
2437 case IEEE80211_MODE_TURBO_G:
2438 return findmedia(rates, nitems(rates), rate | IFM_IEEE80211_11G);
2439 case IEEE80211_MODE_VHT_2GHZ:
2440 case IEEE80211_MODE_VHT_5GHZ:
2441 /* XXX TODO: need to figure out mapping for VHT rates */
2448 ieee80211_media2rate(int mword)
2450 static const int ieeerates[] = {
2454 2, /* IFM_IEEE80211_FH1 */
2455 4, /* IFM_IEEE80211_FH2 */
2456 2, /* IFM_IEEE80211_DS1 */
2457 4, /* IFM_IEEE80211_DS2 */
2458 11, /* IFM_IEEE80211_DS5 */
2459 22, /* IFM_IEEE80211_DS11 */
2460 44, /* IFM_IEEE80211_DS22 */
2461 12, /* IFM_IEEE80211_OFDM6 */
2462 18, /* IFM_IEEE80211_OFDM9 */
2463 24, /* IFM_IEEE80211_OFDM12 */
2464 36, /* IFM_IEEE80211_OFDM18 */
2465 48, /* IFM_IEEE80211_OFDM24 */
2466 72, /* IFM_IEEE80211_OFDM36 */
2467 96, /* IFM_IEEE80211_OFDM48 */
2468 108, /* IFM_IEEE80211_OFDM54 */
2469 144, /* IFM_IEEE80211_OFDM72 */
2470 0, /* IFM_IEEE80211_DS354k */
2471 0, /* IFM_IEEE80211_DS512k */
2472 6, /* IFM_IEEE80211_OFDM3 */
2473 9, /* IFM_IEEE80211_OFDM4 */
2474 54, /* IFM_IEEE80211_OFDM27 */
2475 -1, /* IFM_IEEE80211_MCS */
2476 -1, /* IFM_IEEE80211_VHT */
2478 return IFM_SUBTYPE(mword) < nitems(ieeerates) ?
2479 ieeerates[IFM_SUBTYPE(mword)] : 0;
2483 * The following hash function is adapted from "Hash Functions" by Bob Jenkins
2484 * ("Algorithm Alley", Dr. Dobbs Journal, September 1997).
2486 #define mix(a, b, c) \
2488 a -= b; a -= c; a ^= (c >> 13); \
2489 b -= c; b -= a; b ^= (a << 8); \
2490 c -= a; c -= b; c ^= (b >> 13); \
2491 a -= b; a -= c; a ^= (c >> 12); \
2492 b -= c; b -= a; b ^= (a << 16); \
2493 c -= a; c -= b; c ^= (b >> 5); \
2494 a -= b; a -= c; a ^= (c >> 3); \
2495 b -= c; b -= a; b ^= (a << 10); \
2496 c -= a; c -= b; c ^= (b >> 15); \
2497 } while (/*CONSTCOND*/0)
2500 ieee80211_mac_hash(const struct ieee80211com *ic,
2501 const uint8_t addr[IEEE80211_ADDR_LEN])
2503 uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = ic->ic_hash_key;
2519 ieee80211_channel_type_char(const struct ieee80211_channel *c)
2521 if (IEEE80211_IS_CHAN_ST(c))
2523 if (IEEE80211_IS_CHAN_108A(c))
2525 if (IEEE80211_IS_CHAN_108G(c))
2527 if (IEEE80211_IS_CHAN_VHT(c))
2529 if (IEEE80211_IS_CHAN_HT(c))
2531 if (IEEE80211_IS_CHAN_A(c))
2533 if (IEEE80211_IS_CHAN_ANYG(c))
2535 if (IEEE80211_IS_CHAN_B(c))