wlan - Rip out all wlan locks part 1/2
[dragonfly.git] / sys / netproto / 802_11 / wlan / ieee80211.c
CommitLineData
32176cfd 1/*-
f186073c 2 * Copyright (c) 2001 Atsushi Onoe
32176cfd 3 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting
f186073c
JS
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
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.
f186073c
JS
14 *
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.
25 *
4028af95 26 * $FreeBSD: head/sys/net80211/ieee80211.c 206358 2010-04-07 15:29:13Z rpaulo $
32176cfd 27 * $DragonFly$
f186073c
JS
28 */
29
30/*
31 * IEEE 802.11 generic handler
32 */
32176cfd 33#include "opt_wlan.h"
f186073c 34
f186073c 35#include <sys/param.h>
32176cfd 36#include <sys/systm.h>
f186073c 37#include <sys/kernel.h>
32176cfd 38
841ab66c 39#include <sys/socket.h>
e8361ca0 40#include <sys/thread.h>
841ab66c 41
f186073c 42#include <net/if.h>
32176cfd 43#include <net/if_dl.h>
841ab66c 44#include <net/if_media.h>
32176cfd 45#include <net/if_types.h>
34a60cf6 46#include <net/ifq_var.h>
f186073c 47#include <net/ethernet.h>
32176cfd 48#include <net/route.h>
f186073c
JS
49
50#include <netproto/802_11/ieee80211_var.h>
32176cfd
RP
51#include <netproto/802_11/ieee80211_regdomain.h>
52#ifdef IEEE80211_SUPPORT_SUPERG
53#include <netproto/802_11/ieee80211_superg.h>
54#endif
4028af95 55#include <netproto/802_11/ieee80211_ratectl.h>
f186073c
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56
57#include <net/bpf.h>
58
32176cfd
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59const char *ieee80211_phymode_name[IEEE80211_MODE_MAX] = {
60 [IEEE80211_MODE_AUTO] = "auto",
61 [IEEE80211_MODE_11A] = "11a",
62 [IEEE80211_MODE_11B] = "11b",
63 [IEEE80211_MODE_11G] = "11g",
64 [IEEE80211_MODE_FH] = "FH",
65 [IEEE80211_MODE_TURBO_A] = "turboA",
66 [IEEE80211_MODE_TURBO_G] = "turboG",
67 [IEEE80211_MODE_STURBO_A] = "sturboA",
68 [IEEE80211_MODE_HALF] = "half",
69 [IEEE80211_MODE_QUARTER] = "quarter",
70 [IEEE80211_MODE_11NA] = "11na",
71 [IEEE80211_MODE_11NG] = "11ng",
f186073c 72};
32176cfd
RP
73/* map ieee80211_opmode to the corresponding capability bit */
74const int ieee80211_opcap[IEEE80211_OPMODE_MAX] = {
75 [IEEE80211_M_IBSS] = IEEE80211_C_IBSS,
76 [IEEE80211_M_WDS] = IEEE80211_C_WDS,
77 [IEEE80211_M_STA] = IEEE80211_C_STA,
78 [IEEE80211_M_AHDEMO] = IEEE80211_C_AHDEMO,
79 [IEEE80211_M_HOSTAP] = IEEE80211_C_HOSTAP,
80 [IEEE80211_M_MONITOR] = IEEE80211_C_MONITOR,
81#ifdef IEEE80211_SUPPORT_MESH
82 [IEEE80211_M_MBSS] = IEEE80211_C_MBSS,
83#endif
84};
85
86static const uint8_t ieee80211broadcastaddr[IEEE80211_ADDR_LEN] =
87 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
88
89static void ieee80211_syncflag_locked(struct ieee80211com *ic, int flag);
90static void ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag);
91static void ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag);
92static int ieee80211_media_setup(struct ieee80211com *ic,
93 struct ifmedia *media, int caps, int addsta,
94 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat);
95static void ieee80211com_media_status(struct ifnet *, struct ifmediareq *);
96static int ieee80211com_media_change(struct ifnet *);
97static int media_status(enum ieee80211_opmode,
98 const struct ieee80211_channel *);
f186073c 99
32176cfd 100MALLOC_DEFINE(M_80211_VAP, "80211vap", "802.11 vap state");
841ab66c 101
32176cfd
RP
102/*
103 * Default supported rates for 802.11 operation (in IEEE .5Mb units).
104 */
105#define B(r) ((r) | IEEE80211_RATE_BASIC)
106static const struct ieee80211_rateset ieee80211_rateset_11a =
107 { 8, { B(12), 18, B(24), 36, B(48), 72, 96, 108 } };
108static const struct ieee80211_rateset ieee80211_rateset_half =
109 { 8, { B(6), 9, B(12), 18, B(24), 36, 48, 54 } };
110static const struct ieee80211_rateset ieee80211_rateset_quarter =
111 { 8, { B(3), 4, B(6), 9, B(12), 18, 24, 27 } };
112static const struct ieee80211_rateset ieee80211_rateset_11b =
113 { 4, { B(2), B(4), B(11), B(22) } };
114/* NB: OFDM rates are handled specially based on mode */
115static const struct ieee80211_rateset ieee80211_rateset_11g =
116 { 12, { B(2), B(4), B(11), B(22), 12, 18, 24, 36, 48, 72, 96, 108 } };
117#undef B
118
e8361ca0
JT
119/* Global token used for wlan layer and wireless NIC driver layer */
120lwkt_token wlan_token;
121
32176cfd
RP
122/*
123 * Fill in 802.11 available channel set, mark
124 * all available channels as active, and pick
125 * a default channel if not already specified.
126 */
841ab66c 127static void
32176cfd 128ieee80211_chan_init(struct ieee80211com *ic)
841ab66c 129{
32176cfd
RP
130#define DEFAULTRATES(m, def) do { \
131 if (ic->ic_sup_rates[m].rs_nrates == 0) \
132 ic->ic_sup_rates[m] = def; \
133} while (0)
134 struct ieee80211_channel *c;
841ab66c 135 int i;
841ab66c 136
32176cfd
RP
137 KASSERT(0 < ic->ic_nchans && ic->ic_nchans <= IEEE80211_CHAN_MAX,
138 ("invalid number of channels specified: %u", ic->ic_nchans));
139 memset(ic->ic_chan_avail, 0, sizeof(ic->ic_chan_avail));
140 memset(ic->ic_modecaps, 0, sizeof(ic->ic_modecaps));
141 setbit(ic->ic_modecaps, IEEE80211_MODE_AUTO);
142 for (i = 0; i < ic->ic_nchans; i++) {
143 c = &ic->ic_channels[i];
144 KASSERT(c->ic_flags != 0, ("channel with no flags"));
145 /*
146 * Help drivers that work only with frequencies by filling
147 * in IEEE channel #'s if not already calculated. Note this
148 * mimics similar work done in ieee80211_setregdomain when
149 * changing regulatory state.
150 */
151 if (c->ic_ieee == 0)
152 c->ic_ieee = ieee80211_mhz2ieee(c->ic_freq,c->ic_flags);
153 if (IEEE80211_IS_CHAN_HT40(c) && c->ic_extieee == 0)
154 c->ic_extieee = ieee80211_mhz2ieee(c->ic_freq +
155 (IEEE80211_IS_CHAN_HT40U(c) ? 20 : -20),
156 c->ic_flags);
157 /* default max tx power to max regulatory */
158 if (c->ic_maxpower == 0)
159 c->ic_maxpower = 2*c->ic_maxregpower;
160 setbit(ic->ic_chan_avail, c->ic_ieee);
161 /*
162 * Identify mode capabilities.
163 */
164 if (IEEE80211_IS_CHAN_A(c))
165 setbit(ic->ic_modecaps, IEEE80211_MODE_11A);
166 if (IEEE80211_IS_CHAN_B(c))
167 setbit(ic->ic_modecaps, IEEE80211_MODE_11B);
168 if (IEEE80211_IS_CHAN_ANYG(c))
169 setbit(ic->ic_modecaps, IEEE80211_MODE_11G);
170 if (IEEE80211_IS_CHAN_FHSS(c))
171 setbit(ic->ic_modecaps, IEEE80211_MODE_FH);
172 if (IEEE80211_IS_CHAN_108A(c))
173 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_A);
174 if (IEEE80211_IS_CHAN_108G(c))
175 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_G);
176 if (IEEE80211_IS_CHAN_ST(c))
177 setbit(ic->ic_modecaps, IEEE80211_MODE_STURBO_A);
178 if (IEEE80211_IS_CHAN_HALF(c))
179 setbit(ic->ic_modecaps, IEEE80211_MODE_HALF);
180 if (IEEE80211_IS_CHAN_QUARTER(c))
181 setbit(ic->ic_modecaps, IEEE80211_MODE_QUARTER);
182 if (IEEE80211_IS_CHAN_HTA(c))
183 setbit(ic->ic_modecaps, IEEE80211_MODE_11NA);
184 if (IEEE80211_IS_CHAN_HTG(c))
185 setbit(ic->ic_modecaps, IEEE80211_MODE_11NG);
186 }
187 /* initialize candidate channels to all available */
188 memcpy(ic->ic_chan_active, ic->ic_chan_avail,
189 sizeof(ic->ic_chan_avail));
190
191 /* sort channel table to allow lookup optimizations */
192 ieee80211_sort_channels(ic->ic_channels, ic->ic_nchans);
193
194 /* invalidate any previous state */
195 ic->ic_bsschan = IEEE80211_CHAN_ANYC;
196 ic->ic_prevchan = NULL;
197 ic->ic_csa_newchan = NULL;
198 /* arbitrarily pick the first channel */
199 ic->ic_curchan = &ic->ic_channels[0];
200 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
201
202 /* fillin well-known rate sets if driver has not specified */
203 DEFAULTRATES(IEEE80211_MODE_11B, ieee80211_rateset_11b);
204 DEFAULTRATES(IEEE80211_MODE_11G, ieee80211_rateset_11g);
205 DEFAULTRATES(IEEE80211_MODE_11A, ieee80211_rateset_11a);
206 DEFAULTRATES(IEEE80211_MODE_TURBO_A, ieee80211_rateset_11a);
207 DEFAULTRATES(IEEE80211_MODE_TURBO_G, ieee80211_rateset_11g);
208 DEFAULTRATES(IEEE80211_MODE_STURBO_A, ieee80211_rateset_11a);
209 DEFAULTRATES(IEEE80211_MODE_HALF, ieee80211_rateset_half);
210 DEFAULTRATES(IEEE80211_MODE_QUARTER, ieee80211_rateset_quarter);
211 DEFAULTRATES(IEEE80211_MODE_11NA, ieee80211_rateset_11a);
212 DEFAULTRATES(IEEE80211_MODE_11NG, ieee80211_rateset_11g);
213
214 /*
215 * Set auto mode to reset active channel state and any desired channel.
216 */
217 (void) ieee80211_setmode(ic, IEEE80211_MODE_AUTO);
218#undef DEFAULTRATES
219}
841ab66c 220
32176cfd
RP
221static void
222null_update_mcast(struct ifnet *ifp)
223{
224 if_printf(ifp, "need multicast update callback\n");
225}
841ab66c 226
32176cfd
RP
227static void
228null_update_promisc(struct ifnet *ifp)
229{
230 if_printf(ifp, "need promiscuous mode update callback\n");
231}
232
233static int
234null_transmit(struct ifnet *ifp, struct mbuf *m)
235{
236 m_freem(m);
237 ifp->if_oerrors++;
238 return EACCES; /* XXX EIO/EPERM? */
239}
240
241static int
242null_output(struct ifnet *ifp, struct mbuf *m,
243 struct sockaddr *dst, struct rtentry *ro)
244{
245 if_printf(ifp, "discard raw packet\n");
246 return null_transmit(ifp, m);
841ab66c
SZ
247}
248
249static void
32176cfd
RP
250null_input(struct ifnet *ifp, struct mbuf *m)
251{
252 if_printf(ifp, "if_input should not be called\n");
253 m_freem(m);
254}
255
256/*
257 * Attach/setup the common net80211 state. Called by
258 * the driver on attach to prior to creating any vap's.
259 */
260void
261ieee80211_ifattach(struct ieee80211com *ic,
262 const uint8_t macaddr[IEEE80211_ADDR_LEN])
263{
264 struct ifnet *ifp = ic->ic_ifp;
265 struct sockaddr_dl *sdl;
266 struct ifaddr *ifa;
267
268 KASSERT(ifp->if_type == IFT_IEEE80211, ("if_type %d", ifp->if_type));
269
32176cfd
RP
270 TAILQ_INIT(&ic->ic_vaps);
271
272 /* Create a taskqueue for all state changes */
273 ic->ic_tq = taskqueue_create("ic_taskq", M_WAITOK | M_ZERO,
274 taskqueue_thread_enqueue, &ic->ic_tq);
275 taskqueue_start_threads(&ic->ic_tq, 1, TDPRI_KERN_DAEMON, -1,
276 "%s taskq", ifp->if_xname);
277 /*
278 * Fill in 802.11 available channel set, mark all
279 * available channels as active, and pick a default
280 * channel if not already specified.
281 */
282 ieee80211_media_init(ic);
283
284 ic->ic_update_mcast = null_update_mcast;
285 ic->ic_update_promisc = null_update_promisc;
286
287 ic->ic_hash_key = karc4random();
288 ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT;
289 ic->ic_lintval = ic->ic_bintval;
290 ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX;
291
292 ieee80211_crypto_attach(ic);
293 ieee80211_node_attach(ic);
294 ieee80211_power_attach(ic);
295 ieee80211_proto_attach(ic);
296#ifdef IEEE80211_SUPPORT_SUPERG
297 ieee80211_superg_attach(ic);
298#endif
299 ieee80211_ht_attach(ic);
300 ieee80211_scan_attach(ic);
301 ieee80211_regdomain_attach(ic);
302 ieee80211_dfs_attach(ic);
303
304 ieee80211_sysctl_attach(ic);
305
306 ifp->if_addrlen = IEEE80211_ADDR_LEN;
307 ifp->if_hdrlen = 0;
308 if_attach(ifp, NULL);
309 ifp->if_mtu = IEEE80211_MTU_MAX;
310 ifp->if_broadcastaddr = ieee80211broadcastaddr;
311 ifp->if_output = null_output;
312 ifp->if_input = null_input; /* just in case */
313 ifp->if_resolvemulti = NULL; /* NB: callers check */
314
315 ifa = ifaddr_byindex(ifp->if_index);
316 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__));
317 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
318 sdl->sdl_type = IFT_ETHER; /* XXX IFT_IEEE80211? */
319 sdl->sdl_alen = IEEE80211_ADDR_LEN;
320 IEEE80211_ADDR_COPY(LLADDR(sdl), macaddr);
cf719b06 321// IFAFREE(ifa);
32176cfd
RP
322}
323
324/*
325 * Detach net80211 state on device detach. Tear down
326 * all vap's and reclaim all common state prior to the
327 * device state going away. Note we may call back into
328 * driver; it must be prepared for this.
329 */
330void
331ieee80211_ifdetach(struct ieee80211com *ic)
841ab66c 332{
32176cfd
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333 struct ifnet *ifp = ic->ic_ifp;
334 struct ieee80211vap *vap;
335
336 if_detach(ifp);
841ab66c 337
32176cfd
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338 while ((vap = TAILQ_FIRST(&ic->ic_vaps)) != NULL)
339 ieee80211_vap_destroy(vap);
340 ieee80211_waitfor_parent(ic);
341
342 ieee80211_sysctl_detach(ic);
343 ieee80211_dfs_detach(ic);
344 ieee80211_regdomain_detach(ic);
345 ieee80211_scan_detach(ic);
346#ifdef IEEE80211_SUPPORT_SUPERG
347 ieee80211_superg_detach(ic);
348#endif
349 ieee80211_ht_detach(ic);
350 /* NB: must be called before ieee80211_node_detach */
351 ieee80211_proto_detach(ic);
352 ieee80211_crypto_detach(ic);
353 ieee80211_power_detach(ic);
354 ieee80211_node_detach(ic);
841ab66c 355
32176cfd
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356 ifmedia_removeall(&ic->ic_media);
357 taskqueue_free(ic->ic_tq);
841ab66c
SZ
358}
359
360/*
361 * Default reset method for use with the ioctl support. This
362 * method is invoked after any state change in the 802.11
363 * layer that should be propagated to the hardware but not
364 * require re-initialization of the 802.11 state machine (e.g
365 * rescanning for an ap). We always return ENETRESET which
366 * should cause the driver to re-initialize the device. Drivers
367 * can override this method to implement more optimized support.
368 */
369static int
32176cfd 370default_reset(struct ieee80211vap *vap, u_long cmd)
841ab66c
SZ
371{
372 return ENETRESET;
373}
374
32176cfd
RP
375/*
376 * Prepare a vap for use. Drivers use this call to
377 * setup net80211 state in new vap's prior attaching
378 * them with ieee80211_vap_attach (below).
379 */
380int
381ieee80211_vap_setup(struct ieee80211com *ic, struct ieee80211vap *vap,
382 const char name[IFNAMSIZ], int unit, int opmode, int flags,
383 const uint8_t bssid[IEEE80211_ADDR_LEN],
384 const uint8_t macaddr[IEEE80211_ADDR_LEN])
f186073c 385{
841ab66c 386 struct ifnet *ifp;
841ab66c 387
7e395935 388 ifp = if_alloc(IFT_ETHER);
32176cfd
RP
389 if (ifp == NULL) {
390 if_printf(ic->ic_ifp, "%s: unable to allocate ifnet\n",
391 __func__);
392 return ENOMEM;
393 }
394 if_initname(ifp, name, unit);
395 ifp->if_softc = vap; /* back pointer */
396 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST;
397 ifp->if_start = ieee80211_start;
398 ifp->if_ioctl = ieee80211_ioctl;
399 ifp->if_init = ieee80211_init;
400 /* NB: input+output filled in by ether_ifattach */
34a60cf6
RP
401 ifq_set_maxlen(&ifp->if_snd, IFQ_MAXLEN);
402 ifq_set_ready(&ifp->if_snd);
32176cfd
RP
403
404 vap->iv_ifp = ifp;
405 vap->iv_ic = ic;
406 vap->iv_flags = ic->ic_flags; /* propagate common flags */
407 vap->iv_flags_ext = ic->ic_flags_ext;
408 vap->iv_flags_ven = ic->ic_flags_ven;
409 vap->iv_caps = ic->ic_caps &~ IEEE80211_C_OPMODE;
410 vap->iv_htcaps = ic->ic_htcaps;
411 vap->iv_opmode = opmode;
412 vap->iv_caps |= ieee80211_opcap[opmode];
413 switch (opmode) {
414 case IEEE80211_M_WDS:
415 /*
416 * WDS links must specify the bssid of the far end.
417 * For legacy operation this is a static relationship.
418 * For non-legacy operation the station must associate
419 * and be authorized to pass traffic. Plumbing the
420 * vap to the proper node happens when the vap
421 * transitions to RUN state.
422 */
423 IEEE80211_ADDR_COPY(vap->iv_des_bssid, bssid);
424 vap->iv_flags |= IEEE80211_F_DESBSSID;
425 if (flags & IEEE80211_CLONE_WDSLEGACY)
426 vap->iv_flags_ext |= IEEE80211_FEXT_WDSLEGACY;
427 break;
428#ifdef IEEE80211_SUPPORT_TDMA
429 case IEEE80211_M_AHDEMO:
430 if (flags & IEEE80211_CLONE_TDMA) {
431 /* NB: checked before clone operation allowed */
432 KASSERT(ic->ic_caps & IEEE80211_C_TDMA,
433 ("not TDMA capable, ic_caps 0x%x", ic->ic_caps));
f186073c 434 /*
32176cfd
RP
435 * Propagate TDMA capability to mark vap; this
436 * cannot be removed and is used to distinguish
437 * regular ahdemo operation from ahdemo+tdma.
f186073c 438 */
32176cfd 439 vap->iv_caps |= IEEE80211_C_TDMA;
f186073c 440 }
32176cfd
RP
441 break;
442#endif
f186073c 443 }
32176cfd
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444 /* auto-enable s/w beacon miss support */
445 if (flags & IEEE80211_CLONE_NOBEACONS)
446 vap->iv_flags_ext |= IEEE80211_FEXT_SWBMISS;
447 /* auto-generated or user supplied MAC address */
448 if (flags & (IEEE80211_CLONE_BSSID|IEEE80211_CLONE_MACADDR))
449 vap->iv_flags_ext |= IEEE80211_FEXT_UNIQMAC;
841ab66c 450 /*
32176cfd
RP
451 * Enable various functionality by default if we're
452 * capable; the driver can override us if it knows better.
841ab66c 453 */
32176cfd
RP
454 if (vap->iv_caps & IEEE80211_C_WME)
455 vap->iv_flags |= IEEE80211_F_WME;
456 if (vap->iv_caps & IEEE80211_C_BURST)
457 vap->iv_flags |= IEEE80211_F_BURST;
458 /* NB: bg scanning only makes sense for station mode right now */
459 if (vap->iv_opmode == IEEE80211_M_STA &&
460 (vap->iv_caps & IEEE80211_C_BGSCAN))
461 vap->iv_flags |= IEEE80211_F_BGSCAN;
462 vap->iv_flags |= IEEE80211_F_DOTH; /* XXX no cap, just ena */
463 /* NB: DFS support only makes sense for ap mode right now */
464 if (vap->iv_opmode == IEEE80211_M_HOSTAP &&
465 (vap->iv_caps & IEEE80211_C_DFS))
466 vap->iv_flags_ext |= IEEE80211_FEXT_DFS;
467
468 vap->iv_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */
469 vap->iv_bmissthreshold = IEEE80211_HWBMISS_DEFAULT;
470 vap->iv_dtim_period = IEEE80211_DTIM_DEFAULT;
471 /*
472 * Install a default reset method for the ioctl support;
473 * the driver can override this.
474 */
475 vap->iv_reset = default_reset;
476
477 IEEE80211_ADDR_COPY(vap->iv_myaddr, macaddr);
478
479 ieee80211_sysctl_vattach(vap);
480 ieee80211_crypto_vattach(vap);
481 ieee80211_node_vattach(vap);
482 ieee80211_power_vattach(vap);
483 ieee80211_proto_vattach(vap);
484#ifdef IEEE80211_SUPPORT_SUPERG
485 ieee80211_superg_vattach(vap);
841ab66c 486#endif
32176cfd
RP
487 ieee80211_ht_vattach(vap);
488 ieee80211_scan_vattach(vap);
489 ieee80211_regdomain_vattach(vap);
490 ieee80211_radiotap_vattach(vap);
4028af95 491 ieee80211_ratectl_set(vap, IEEE80211_RATECTL_AMRR);
f186073c 492
32176cfd
RP
493 return 0;
494}
841ab66c 495
32176cfd
RP
496/*
497 * Activate a vap. State should have been prepared with a
498 * call to ieee80211_vap_setup and by the driver. On return
499 * from this call the vap is ready for use.
500 */
501int
502ieee80211_vap_attach(struct ieee80211vap *vap,
503 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat)
504{
505 struct ifnet *ifp = vap->iv_ifp;
506 struct ieee80211com *ic = vap->iv_ic;
507 struct ifmediareq imr;
508 int maxrate;
f186073c 509
32176cfd
RP
510 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
511 "%s: %s parent %s flags 0x%x flags_ext 0x%x\n",
512 __func__, ieee80211_opmode_name[vap->iv_opmode],
513 ic->ic_ifp->if_xname, vap->iv_flags, vap->iv_flags_ext);
841ab66c 514
32176cfd
RP
515 /*
516 * Do late attach work that cannot happen until after
517 * the driver has had a chance to override defaults.
518 */
519 ieee80211_node_latevattach(vap);
520 ieee80211_power_latevattach(vap);
841ab66c 521
32176cfd
RP
522 maxrate = ieee80211_media_setup(ic, &vap->iv_media, vap->iv_caps,
523 vap->iv_opmode == IEEE80211_M_STA, media_change, media_stat);
524 ieee80211_media_status(ifp, &imr);
525 /* NB: strip explicit mode; we're actually in autoselect */
526 ifmedia_set(&vap->iv_media,
527 imr.ifm_active &~ (IFM_MMASK | IFM_IEEE80211_TURBO));
528 if (maxrate)
529 ifp->if_baudrate = IF_Mbps(maxrate);
841ab66c 530
32176cfd
RP
531 ether_ifattach(ifp, vap->iv_myaddr, NULL);
532 if (vap->iv_opmode == IEEE80211_M_MONITOR) {
533 /* NB: disallow transmit */
34a60cf6 534#ifdef __FreeBSD__
32176cfd 535 ifp->if_transmit = null_transmit;
34a60cf6 536#endif
32176cfd
RP
537 ifp->if_output = null_output;
538 } else {
539 /* hook output method setup by ether_ifattach */
540 vap->iv_output = ifp->if_output;
541 ifp->if_output = ieee80211_output;
542 }
543 /* NB: if_mtu set by ether_ifattach to ETHERMTU */
544
32176cfd
RP
545 TAILQ_INSERT_TAIL(&ic->ic_vaps, vap, iv_next);
546 ieee80211_syncflag_locked(ic, IEEE80211_F_WME);
547#ifdef IEEE80211_SUPPORT_SUPERG
548 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP);
549#endif
550 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF);
551 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST);
552 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT);
553 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40);
554 ieee80211_syncifflag_locked(ic, IFF_PROMISC);
555 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI);
32176cfd
RP
556
557 return 1;
558}
559
560/*
561 * Tear down vap state and reclaim the ifnet.
562 * The driver is assumed to have prepared for
563 * this; e.g. by turning off interrupts for the
564 * underlying device.
565 */
566void
567ieee80211_vap_detach(struct ieee80211vap *vap)
568{
569 struct ieee80211com *ic = vap->iv_ic;
570 struct ifnet *ifp = vap->iv_ifp;
571
572 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s parent %s\n",
573 __func__, ieee80211_opmode_name[vap->iv_opmode],
574 ic->ic_ifp->if_xname);
575
576 /* NB: bpfdetach is called by ether_ifdetach and claims all taps */
577 ether_ifdetach(ifp);
578
579 ieee80211_stop(vap);
b9334f94 580
841ab66c 581 /*
32176cfd 582 * Flush any deferred vap tasks.
841ab66c 583 */
32176cfd
RP
584 ieee80211_draintask(ic, &vap->iv_nstate_task);
585 ieee80211_draintask(ic, &vap->iv_swbmiss_task);
586
34a60cf6 587#ifdef __FreeBSD__
32176cfd
RP
588 /* XXX band-aid until ifnet handles this for us */
589 taskqueue_drain(taskqueue_swi, &ifp->if_linktask);
34a60cf6 590#endif
32176cfd 591
32176cfd
RP
592 KASSERT(vap->iv_state == IEEE80211_S_INIT , ("vap still running"));
593 TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next);
594 ieee80211_syncflag_locked(ic, IEEE80211_F_WME);
595#ifdef IEEE80211_SUPPORT_SUPERG
596 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP);
597#endif
598 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF);
599 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST);
600 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT);
601 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40);
602 /* NB: this handles the bpfdetach done below */
603 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_BPF);
604 ieee80211_syncifflag_locked(ic, IFF_PROMISC);
605 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI);
32176cfd
RP
606
607 ifmedia_removeall(&vap->iv_media);
608
609 ieee80211_radiotap_vdetach(vap);
610 ieee80211_regdomain_vdetach(vap);
611 ieee80211_scan_vdetach(vap);
612#ifdef IEEE80211_SUPPORT_SUPERG
613 ieee80211_superg_vdetach(vap);
614#endif
615 ieee80211_ht_vdetach(vap);
616 /* NB: must be before ieee80211_node_vdetach */
617 ieee80211_proto_vdetach(vap);
618 ieee80211_crypto_vdetach(vap);
619 ieee80211_power_vdetach(vap);
620 ieee80211_node_vdetach(vap);
621 ieee80211_sysctl_vdetach(vap);
622
623 if_free(ifp);
f186073c
JS
624}
625
32176cfd
RP
626/*
627 * Synchronize flag bit state in the parent ifnet structure
628 * according to the state of all vap ifnet's. This is used,
629 * for example, to handle IFF_PROMISC and IFF_ALLMULTI.
630 */
f186073c 631void
32176cfd 632ieee80211_syncifflag_locked(struct ieee80211com *ic, int flag)
f186073c 633{
841ab66c 634 struct ifnet *ifp = ic->ic_ifp;
32176cfd
RP
635 struct ieee80211vap *vap;
636 int bit, oflags;
841ab66c 637
32176cfd
RP
638 bit = 0;
639 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
640 if (vap->iv_ifp->if_flags & flag) {
641 /*
642 * XXX the bridge sets PROMISC but we don't want to
643 * enable it on the device, discard here so all the
644 * drivers don't need to special-case it
645 */
646 if (flag == IFF_PROMISC &&
647 !(vap->iv_opmode == IEEE80211_M_MONITOR ||
648 (vap->iv_opmode == IEEE80211_M_AHDEMO &&
649 (vap->iv_caps & IEEE80211_C_TDMA) == 0)))
650 continue;
651 bit = 1;
652 break;
653 }
654 oflags = ifp->if_flags;
655 if (bit)
656 ifp->if_flags |= flag;
657 else
658 ifp->if_flags &= ~flag;
659 if ((ifp->if_flags ^ oflags) & flag) {
660 /* XXX should we return 1/0 and let caller do this? */
34a60cf6 661 if (ifp->if_flags & IFF_RUNNING) {
32176cfd
RP
662 if (flag == IFF_PROMISC)
663 ieee80211_runtask(ic, &ic->ic_promisc_task);
664 else if (flag == IFF_ALLMULTI)
665 ieee80211_runtask(ic, &ic->ic_mcast_task);
666 }
667 }
668}
841ab66c 669
32176cfd
RP
670/*
671 * Synchronize flag bit state in the com structure
672 * according to the state of all vap's. This is used,
673 * for example, to handle state changes via ioctls.
674 */
675static void
676ieee80211_syncflag_locked(struct ieee80211com *ic, int flag)
677{
678 struct ieee80211vap *vap;
679 int bit;
841ab66c 680
32176cfd
RP
681 bit = 0;
682 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
683 if (vap->iv_flags & flag) {
684 bit = 1;
685 break;
686 }
687 if (bit)
688 ic->ic_flags |= flag;
689 else
690 ic->ic_flags &= ~flag;
691}
841ab66c 692
32176cfd
RP
693void
694ieee80211_syncflag(struct ieee80211vap *vap, int flag)
695{
696 struct ieee80211com *ic = vap->iv_ic;
697
32176cfd
RP
698 if (flag < 0) {
699 flag = -flag;
700 vap->iv_flags &= ~flag;
701 } else
702 vap->iv_flags |= flag;
703 ieee80211_syncflag_locked(ic, flag);
32176cfd
RP
704}
705
706/*
707 * Synchronize flags_ht bit state in the com structure
708 * according to the state of all vap's. This is used,
709 * for example, to handle state changes via ioctls.
710 */
711static void
712ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag)
713{
714 struct ieee80211vap *vap;
715 int bit;
716
32176cfd
RP
717 bit = 0;
718 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
719 if (vap->iv_flags_ht & flag) {
720 bit = 1;
721 break;
722 }
723 if (bit)
724 ic->ic_flags_ht |= flag;
725 else
726 ic->ic_flags_ht &= ~flag;
727}
728
729void
730ieee80211_syncflag_ht(struct ieee80211vap *vap, int flag)
731{
732 struct ieee80211com *ic = vap->iv_ic;
733
32176cfd
RP
734 if (flag < 0) {
735 flag = -flag;
736 vap->iv_flags_ht &= ~flag;
737 } else
738 vap->iv_flags_ht |= flag;
739 ieee80211_syncflag_ht_locked(ic, flag);
32176cfd
RP
740}
741
742/*
743 * Synchronize flags_ext bit state in the com structure
744 * according to the state of all vap's. This is used,
745 * for example, to handle state changes via ioctls.
746 */
747static void
748ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag)
749{
750 struct ieee80211vap *vap;
751 int bit;
752
32176cfd
RP
753 bit = 0;
754 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
755 if (vap->iv_flags_ext & flag) {
756 bit = 1;
757 break;
758 }
759 if (bit)
760 ic->ic_flags_ext |= flag;
761 else
762 ic->ic_flags_ext &= ~flag;
763}
764
765void
766ieee80211_syncflag_ext(struct ieee80211vap *vap, int flag)
767{
768 struct ieee80211com *ic = vap->iv_ic;
769
32176cfd
RP
770 if (flag < 0) {
771 flag = -flag;
772 vap->iv_flags_ext &= ~flag;
773 } else
774 vap->iv_flags_ext |= flag;
775 ieee80211_syncflag_ext_locked(ic, flag);
32176cfd
RP
776}
777
778static __inline int
779mapgsm(u_int freq, u_int flags)
780{
781 freq *= 10;
782 if (flags & IEEE80211_CHAN_QUARTER)
783 freq += 5;
784 else if (flags & IEEE80211_CHAN_HALF)
785 freq += 10;
786 else
787 freq += 20;
788 /* NB: there is no 907/20 wide but leave room */
789 return (freq - 906*10) / 5;
790}
791
792static __inline int
793mappsb(u_int freq, u_int flags)
794{
795 return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5;
f186073c
JS
796}
797
798/*
799 * Convert MHz frequency to IEEE channel number.
800 */
32176cfd 801int
f186073c
JS
802ieee80211_mhz2ieee(u_int freq, u_int flags)
803{
32176cfd
RP
804#define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990)
805 if (flags & IEEE80211_CHAN_GSM)
806 return mapgsm(freq, flags);
f186073c
JS
807 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
808 if (freq == 2484)
809 return 14;
810 if (freq < 2484)
32176cfd 811 return ((int) freq - 2407) / 5;
f186073c
JS
812 else
813 return 15 + ((freq - 2512) / 20);
814 } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */
32176cfd
RP
815 if (freq <= 5000) {
816 /* XXX check regdomain? */
817 if (IS_FREQ_IN_PSB(freq))
818 return mappsb(freq, flags);
819 return (freq - 4000) / 5;
820 } else
821 return (freq - 5000) / 5;
f186073c
JS
822 } else { /* either, guess */
823 if (freq == 2484)
824 return 14;
32176cfd
RP
825 if (freq < 2484) {
826 if (907 <= freq && freq <= 922)
827 return mapgsm(freq, flags);
828 return ((int) freq - 2407) / 5;
829 }
830 if (freq < 5000) {
831 if (IS_FREQ_IN_PSB(freq))
832 return mappsb(freq, flags);
833 else if (freq > 4900)
834 return (freq - 4000) / 5;
835 else
836 return 15 + ((freq - 2512) / 20);
837 }
f186073c
JS
838 return (freq - 5000) / 5;
839 }
32176cfd 840#undef IS_FREQ_IN_PSB
f186073c
JS
841}
842
843/*
844 * Convert channel to IEEE channel number.
845 */
32176cfd 846int
47f525a7 847ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c)
f186073c 848{
32176cfd 849 if (c == NULL) {
841ab66c 850 if_printf(ic->ic_ifp, "invalid channel (NULL)\n");
f186073c
JS
851 return 0; /* XXX */
852 }
32176cfd 853 return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee);
f186073c
JS
854}
855
856/*
857 * Convert IEEE channel number to MHz frequency.
858 */
859u_int
860ieee80211_ieee2mhz(u_int chan, u_int flags)
861{
32176cfd
RP
862 if (flags & IEEE80211_CHAN_GSM)
863 return 907 + 5 * (chan / 10);
f186073c
JS
864 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
865 if (chan == 14)
866 return 2484;
867 if (chan < 14)
868 return 2407 + chan*5;
869 else
870 return 2512 + ((chan-15)*20);
871 } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */
32176cfd
RP
872 if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) {
873 chan -= 37;
874 return 4940 + chan*5 + (chan % 5 ? 2 : 0);
875 }
f186073c
JS
876 return 5000 + (chan*5);
877 } else { /* either, guess */
32176cfd 878 /* XXX can't distinguish PSB+GSM channels */
f186073c
JS
879 if (chan == 14)
880 return 2484;
881 if (chan < 14) /* 0-13 */
882 return 2407 + chan*5;
883 if (chan < 27) /* 15-26 */
884 return 2512 + ((chan-15)*20);
885 return 5000 + (chan*5);
886 }
887}
888
889/*
32176cfd
RP
890 * Locate a channel given a frequency+flags. We cache
891 * the previous lookup to optimize switching between two
892 * channels--as happens with dynamic turbo.
f186073c 893 */
32176cfd
RP
894struct ieee80211_channel *
895ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags)
f186073c 896{
32176cfd
RP
897 struct ieee80211_channel *c;
898 int i;
f186073c 899
32176cfd
RP
900 flags &= IEEE80211_CHAN_ALLTURBO;
901 c = ic->ic_prevchan;
902 if (c != NULL && c->ic_freq == freq &&
903 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
904 return c;
905 /* brute force search */
906 for (i = 0; i < ic->ic_nchans; i++) {
907 c = &ic->ic_channels[i];
908 if (c->ic_freq == freq &&
909 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
910 return c;
911 }
912 return NULL;
913}
841ab66c 914
32176cfd
RP
915/*
916 * Locate a channel given a channel number+flags. We cache
917 * the previous lookup to optimize switching between two
918 * channels--as happens with dynamic turbo.
919 */
920struct ieee80211_channel *
921ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags)
922{
923 struct ieee80211_channel *c;
924 int i;
841ab66c 925
32176cfd
RP
926 flags &= IEEE80211_CHAN_ALLTURBO;
927 c = ic->ic_prevchan;
928 if (c != NULL && c->ic_ieee == ieee &&
929 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
930 return c;
931 /* brute force search */
932 for (i = 0; i < ic->ic_nchans; i++) {
933 c = &ic->ic_channels[i];
934 if (c->ic_ieee == ieee &&
935 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
936 return c;
937 }
938 return NULL;
939}
940
941static void
942addmedia(struct ifmedia *media, int caps, int addsta, int mode, int mword)
943{
944#define ADD(_ic, _s, _o) \
945 ifmedia_add(media, \
946 IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL)
947 static const u_int mopts[IEEE80211_MODE_MAX] = {
948 [IEEE80211_MODE_AUTO] = IFM_AUTO,
949 [IEEE80211_MODE_11A] = IFM_IEEE80211_11A,
950 [IEEE80211_MODE_11B] = IFM_IEEE80211_11B,
951 [IEEE80211_MODE_11G] = IFM_IEEE80211_11G,
952 [IEEE80211_MODE_FH] = IFM_IEEE80211_FH,
953 [IEEE80211_MODE_TURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO,
954 [IEEE80211_MODE_TURBO_G] = IFM_IEEE80211_11G|IFM_IEEE80211_TURBO,
955 [IEEE80211_MODE_STURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO,
956 [IEEE80211_MODE_HALF] = IFM_IEEE80211_11A, /* XXX */
957 [IEEE80211_MODE_QUARTER] = IFM_IEEE80211_11A, /* XXX */
958 [IEEE80211_MODE_11NA] = IFM_IEEE80211_11NA,
959 [IEEE80211_MODE_11NG] = IFM_IEEE80211_11NG,
960 };
961 u_int mopt;
962
963 mopt = mopts[mode];
964 if (addsta)
965 ADD(ic, mword, mopt); /* STA mode has no cap */
966 if (caps & IEEE80211_C_IBSS)
967 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC);
968 if (caps & IEEE80211_C_HOSTAP)
969 ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP);
970 if (caps & IEEE80211_C_AHDEMO)
971 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0);
972 if (caps & IEEE80211_C_MONITOR)
973 ADD(media, mword, mopt | IFM_IEEE80211_MONITOR);
974 if (caps & IEEE80211_C_WDS)
975 ADD(media, mword, mopt | IFM_IEEE80211_WDS);
976 if (caps & IEEE80211_C_MBSS)
977 ADD(media, mword, mopt | IFM_IEEE80211_MBSS);
978#undef ADD
979}
980
981/*
982 * Setup the media data structures according to the channel and
983 * rate tables.
984 */
985static int
986ieee80211_media_setup(struct ieee80211com *ic,
987 struct ifmedia *media, int caps, int addsta,
988 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat)
989{
990 int i, j, mode, rate, maxrate, mword, r;
991 const struct ieee80211_rateset *rs;
992 struct ieee80211_rateset allrates;
f186073c
JS
993
994 /*
995 * Fill in media characteristics.
996 */
32176cfd 997 ifmedia_init(media, 0, media_change, media_stat);
f186073c 998 maxrate = 0;
32176cfd
RP
999 /*
1000 * Add media for legacy operating modes.
1001 */
f186073c 1002 memset(&allrates, 0, sizeof(allrates));
32176cfd
RP
1003 for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) {
1004 if (isclr(ic->ic_modecaps, mode))
f186073c 1005 continue;
32176cfd 1006 addmedia(media, caps, addsta, mode, IFM_AUTO);
f186073c
JS
1007 if (mode == IEEE80211_MODE_AUTO)
1008 continue;
f186073c
JS
1009 rs = &ic->ic_sup_rates[mode];
1010 for (i = 0; i < rs->rs_nrates; i++) {
1011 rate = rs->rs_rates[i];
1012 mword = ieee80211_rate2media(ic, rate, mode);
1013 if (mword == 0)
1014 continue;
32176cfd 1015 addmedia(media, caps, addsta, mode, mword);
f186073c 1016 /*
32176cfd 1017 * Add legacy rate to the collection of all rates.
f186073c
JS
1018 */
1019 r = rate & IEEE80211_RATE_VAL;
1020 for (j = 0; j < allrates.rs_nrates; j++)
1021 if (allrates.rs_rates[j] == r)
1022 break;
1023 if (j == allrates.rs_nrates) {
1024 /* unique, add to the set */
1025 allrates.rs_rates[j] = r;
1026 allrates.rs_nrates++;
1027 }
1028 rate = (rate & IEEE80211_RATE_VAL) / 2;
1029 if (rate > maxrate)
1030 maxrate = rate;
1031 }
f186073c
JS
1032 }
1033 for (i = 0; i < allrates.rs_nrates; i++) {
1034 mword = ieee80211_rate2media(ic, allrates.rs_rates[i],
1035 IEEE80211_MODE_AUTO);
1036 if (mword == 0)
1037 continue;
32176cfd
RP
1038 /* NB: remove media options from mword */
1039 addmedia(media, caps, addsta,
1040 IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword));
f186073c 1041 }
32176cfd
RP
1042 /*
1043 * Add HT/11n media. Note that we do not have enough
1044 * bits in the media subtype to express the MCS so we
1045 * use a "placeholder" media subtype and any fixed MCS
1046 * must be specified with a different mechanism.
1047 */
1048 for (; mode <= IEEE80211_MODE_11NG; mode++) {
1049 if (isclr(ic->ic_modecaps, mode))
1050 continue;
1051 addmedia(media, caps, addsta, mode, IFM_AUTO);
1052 addmedia(media, caps, addsta, mode, IFM_IEEE80211_MCS);
1053 }
1054 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) ||
1055 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) {
1056 addmedia(media, caps, addsta,
1057 IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS);
1058 /* XXX could walk htrates */
1059 /* XXX known array size */
1060 if (ieee80211_htrates[15].ht40_rate_400ns > maxrate)
1061 maxrate = ieee80211_htrates[15].ht40_rate_400ns;
1062 }
1063 return maxrate;
1064}
1065
1066void
1067ieee80211_media_init(struct ieee80211com *ic)
1068{
1069 struct ifnet *ifp = ic->ic_ifp;
1070 int maxrate;
1071
1072 /* NB: this works because the structure is initialized to zero */
1073 if (!LIST_EMPTY(&ic->ic_media.ifm_list)) {
1074 /*
1075 * We are re-initializing the channel list; clear
1076 * the existing media state as the media routines
1077 * don't suppress duplicates.
1078 */
1079 ifmedia_removeall(&ic->ic_media);
1080 }
1081 ieee80211_chan_init(ic);
f186073c 1082
32176cfd
RP
1083 /*
1084 * Recalculate media settings in case new channel list changes
1085 * the set of available modes.
1086 */
1087 maxrate = ieee80211_media_setup(ic, &ic->ic_media, ic->ic_caps, 1,
1088 ieee80211com_media_change, ieee80211com_media_status);
1089 /* NB: strip explicit mode; we're actually in autoselect */
1090 ifmedia_set(&ic->ic_media,
1091 media_status(ic->ic_opmode, ic->ic_curchan) &~
1092 (IFM_MMASK | IFM_IEEE80211_TURBO));
f186073c
JS
1093 if (maxrate)
1094 ifp->if_baudrate = IF_Mbps(maxrate);
32176cfd
RP
1095
1096 /* XXX need to propagate new media settings to vap's */
1097}
1098
1099/* XXX inline or eliminate? */
1100const struct ieee80211_rateset *
1101ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c)
1102{
1103 /* XXX does this work for 11ng basic rates? */
1104 return &ic->ic_sup_rates[ieee80211_chan2mode(c)];
f186073c
JS
1105}
1106
841ab66c
SZ
1107void
1108ieee80211_announce(struct ieee80211com *ic)
1109{
1110 struct ifnet *ifp = ic->ic_ifp;
1111 int i, mode, rate, mword;
32176cfd 1112 const struct ieee80211_rateset *rs;
841ab66c 1113
32176cfd
RP
1114 /* NB: skip AUTO since it has no rates */
1115 for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) {
1116 if (isclr(ic->ic_modecaps, mode))
841ab66c
SZ
1117 continue;
1118 if_printf(ifp, "%s rates: ", ieee80211_phymode_name[mode]);
1119 rs = &ic->ic_sup_rates[mode];
1120 for (i = 0; i < rs->rs_nrates; i++) {
32176cfd 1121 mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode);
841ab66c
SZ
1122 if (mword == 0)
1123 continue;
32176cfd 1124 rate = ieee80211_media2rate(mword);
a6ec04bc 1125 kprintf("%s%d%sMbps", (i != 0 ? " " : ""),
32176cfd 1126 rate / 2, ((rate & 0x1) != 0 ? ".5" : ""));
841ab66c 1127 }
a6ec04bc 1128 kprintf("\n");
841ab66c 1129 }
32176cfd 1130 ieee80211_ht_announce(ic);
841ab66c
SZ
1131}
1132
32176cfd
RP
1133void
1134ieee80211_announce_channels(struct ieee80211com *ic)
841ab66c 1135{
32176cfd
RP
1136 const struct ieee80211_channel *c;
1137 char type;
1138 int i, cw;
841ab66c 1139
32176cfd
RP
1140 kprintf("Chan Freq CW RegPwr MinPwr MaxPwr\n");
1141 for (i = 0; i < ic->ic_nchans; i++) {
1142 c = &ic->ic_channels[i];
1143 if (IEEE80211_IS_CHAN_ST(c))
1144 type = 'S';
1145 else if (IEEE80211_IS_CHAN_108A(c))
1146 type = 'T';
1147 else if (IEEE80211_IS_CHAN_108G(c))
1148 type = 'G';
1149 else if (IEEE80211_IS_CHAN_HT(c))
1150 type = 'n';
1151 else if (IEEE80211_IS_CHAN_A(c))
1152 type = 'a';
1153 else if (IEEE80211_IS_CHAN_ANYG(c))
1154 type = 'g';
1155 else if (IEEE80211_IS_CHAN_B(c))
1156 type = 'b';
1157 else
1158 type = 'f';
1159 if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c))
1160 cw = 40;
1161 else if (IEEE80211_IS_CHAN_HALF(c))
1162 cw = 10;
1163 else if (IEEE80211_IS_CHAN_QUARTER(c))
1164 cw = 5;
1165 else
1166 cw = 20;
1167 kprintf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n"
1168 , c->ic_ieee, c->ic_freq, type
1169 , cw
1170 , IEEE80211_IS_CHAN_HT40U(c) ? '+' :
1171 IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' '
1172 , c->ic_maxregpower
1173 , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0
1174 , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0
1175 );
1176 }
841ab66c
SZ
1177}
1178
32176cfd
RP
1179static int
1180media2mode(const struct ifmedia_entry *ime, uint32_t flags, uint16_t *mode)
f186073c 1181{
f186073c
JS
1182 switch (IFM_MODE(ime->ifm_media)) {
1183 case IFM_IEEE80211_11A:
32176cfd 1184 *mode = IEEE80211_MODE_11A;
f186073c
JS
1185 break;
1186 case IFM_IEEE80211_11B:
32176cfd 1187 *mode = IEEE80211_MODE_11B;
f186073c
JS
1188 break;
1189 case IFM_IEEE80211_11G:
32176cfd 1190 *mode = IEEE80211_MODE_11G;
f186073c
JS
1191 break;
1192 case IFM_IEEE80211_FH:
32176cfd
RP
1193 *mode = IEEE80211_MODE_FH;
1194 break;
1195 case IFM_IEEE80211_11NA:
1196 *mode = IEEE80211_MODE_11NA;
1197 break;
1198 case IFM_IEEE80211_11NG:
1199 *mode = IEEE80211_MODE_11NG;
f186073c
JS
1200 break;
1201 case IFM_AUTO:
32176cfd 1202 *mode = IEEE80211_MODE_AUTO;
f186073c
JS
1203 break;
1204 default:
32176cfd 1205 return 0;
f186073c
JS
1206 }
1207 /*
841ab66c
SZ
1208 * Turbo mode is an ``option''.
1209 * XXX does not apply to AUTO
f186073c
JS
1210 */
1211 if (ime->ifm_media & IFM_IEEE80211_TURBO) {
32176cfd
RP
1212 if (*mode == IEEE80211_MODE_11A) {
1213 if (flags & IEEE80211_F_TURBOP)
1214 *mode = IEEE80211_MODE_TURBO_A;
1215 else
1216 *mode = IEEE80211_MODE_STURBO_A;
1217 } else if (*mode == IEEE80211_MODE_11G)
1218 *mode = IEEE80211_MODE_TURBO_G;
841ab66c 1219 else
32176cfd 1220 return 0;
f186073c 1221 }
32176cfd
RP
1222 /* XXX HT40 +/- */
1223 return 1;
1224}
f186073c 1225
32176cfd
RP
1226/*
1227 * Handle a media change request on the underlying interface.
1228 */
1229int
1230ieee80211com_media_change(struct ifnet *ifp)
1231{
1232 return EINVAL;
1233}
f186073c 1234
32176cfd
RP
1235/*
1236 * Handle a media change request on the vap interface.
1237 */
1238int
1239ieee80211_media_change(struct ifnet *ifp)
1240{
1241 struct ieee80211vap *vap = ifp->if_softc;
1242 struct ifmedia_entry *ime = vap->iv_media.ifm_cur;
1243 uint16_t newmode;
f186073c 1244
32176cfd
RP
1245 if (!media2mode(ime, vap->iv_flags, &newmode))
1246 return EINVAL;
1247 if (vap->iv_des_mode != newmode) {
1248 vap->iv_des_mode = newmode;
1249 /* XXX kick state machine if up+running */
f186073c 1250 }
32176cfd
RP
1251 return 0;
1252}
f186073c 1253
32176cfd
RP
1254/*
1255 * Common code to calculate the media status word
1256 * from the operating mode and channel state.
1257 */
1258static int
1259media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan)
1260{
1261 int status;
f186073c 1262
32176cfd
RP
1263 status = IFM_IEEE80211;
1264 switch (opmode) {
1265 case IEEE80211_M_STA:
1266 break;
1267 case IEEE80211_M_IBSS:
1268 status |= IFM_IEEE80211_ADHOC;
1269 break;
1270 case IEEE80211_M_HOSTAP:
1271 status |= IFM_IEEE80211_HOSTAP;
1272 break;
1273 case IEEE80211_M_MONITOR:
1274 status |= IFM_IEEE80211_MONITOR;
1275 break;
1276 case IEEE80211_M_AHDEMO:
1277 status |= IFM_IEEE80211_ADHOC | IFM_FLAG0;
1278 break;
1279 case IEEE80211_M_WDS:
1280 status |= IFM_IEEE80211_WDS;
1281 break;
1282 case IEEE80211_M_MBSS:
1283 status |= IFM_IEEE80211_MBSS;
1284 break;
f186073c 1285 }
32176cfd
RP
1286 if (IEEE80211_IS_CHAN_HTA(chan)) {
1287 status |= IFM_IEEE80211_11NA;
1288 } else if (IEEE80211_IS_CHAN_HTG(chan)) {
1289 status |= IFM_IEEE80211_11NG;
1290 } else if (IEEE80211_IS_CHAN_A(chan)) {
1291 status |= IFM_IEEE80211_11A;
1292 } else if (IEEE80211_IS_CHAN_B(chan)) {
1293 status |= IFM_IEEE80211_11B;
1294 } else if (IEEE80211_IS_CHAN_ANYG(chan)) {
1295 status |= IFM_IEEE80211_11G;
1296 } else if (IEEE80211_IS_CHAN_FHSS(chan)) {
1297 status |= IFM_IEEE80211_FH;
1298 }
1299 /* XXX else complain? */
f186073c 1300
32176cfd
RP
1301 if (IEEE80211_IS_CHAN_TURBO(chan))
1302 status |= IFM_IEEE80211_TURBO;
1303#if 0
1304 if (IEEE80211_IS_CHAN_HT20(chan))
1305 status |= IFM_IEEE80211_HT20;
1306 if (IEEE80211_IS_CHAN_HT40(chan))
1307 status |= IFM_IEEE80211_HT40;
1308#endif
1309 return status;
1310}
1311
1312static void
1313ieee80211com_media_status(struct ifnet *ifp, struct ifmediareq *imr)
1314{
1315 struct ieee80211com *ic = ifp->if_l2com;
1316 struct ieee80211vap *vap;
1317
1318 imr->ifm_status = IFM_AVALID;
1319 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
1320 if (vap->iv_ifp->if_flags & IFF_UP) {
1321 imr->ifm_status |= IFM_ACTIVE;
f186073c
JS
1322 break;
1323 }
32176cfd
RP
1324 imr->ifm_active = media_status(ic->ic_opmode, ic->ic_curchan);
1325 if (imr->ifm_status & IFM_ACTIVE)
1326 imr->ifm_current = imr->ifm_active;
f186073c
JS
1327}
1328
1329void
1330ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr)
1331{
32176cfd
RP
1332 struct ieee80211vap *vap = ifp->if_softc;
1333 struct ieee80211com *ic = vap->iv_ic;
1334 enum ieee80211_phymode mode;
f186073c
JS
1335
1336 imr->ifm_status = IFM_AVALID;
32176cfd
RP
1337 /*
1338 * NB: use the current channel's mode to lock down a xmit
1339 * rate only when running; otherwise we may have a mismatch
1340 * in which case the rate will not be convertible.
1341 */
1342 if (vap->iv_state == IEEE80211_S_RUN) {
f186073c 1343 imr->ifm_status |= IFM_ACTIVE;
32176cfd
RP
1344 mode = ieee80211_chan2mode(ic->ic_curchan);
1345 } else
1346 mode = IEEE80211_MODE_AUTO;
1347 imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan);
841ab66c
SZ
1348 /*
1349 * Calculate a current rate if possible.
1350 */
32176cfd 1351 if (vap->iv_txparms[mode].ucastrate != IEEE80211_FIXED_RATE_NONE) {
841ab66c
SZ
1352 /*
1353 * A fixed rate is set, report that.
1354 */
841ab66c 1355 imr->ifm_active |= ieee80211_rate2media(ic,
32176cfd
RP
1356 vap->iv_txparms[mode].ucastrate, mode);
1357 } else if (vap->iv_opmode == IEEE80211_M_STA) {
841ab66c
SZ
1358 /*
1359 * In station mode report the current transmit rate.
1360 */
841ab66c 1361 imr->ifm_active |= ieee80211_rate2media(ic,
32176cfd 1362 vap->iv_bss->ni_txrate, mode);
f186073c 1363 } else
841ab66c 1364 imr->ifm_active |= IFM_AUTO;
32176cfd
RP
1365 if (imr->ifm_status & IFM_ACTIVE)
1366 imr->ifm_current = imr->ifm_active;
f186073c
JS
1367}
1368
1369/*
1370 * Set the current phy mode and recalculate the active channel
1371 * set based on the available channels for this mode. Also
1372 * select a new default/current channel if the current one is
1373 * inappropriate for this mode.
1374 */
1375int
1376ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode)
1377{
f186073c 1378 /*
32176cfd
RP
1379 * Adjust basic rates in 11b/11g supported rate set.
1380 * Note that if operating on a hal/quarter rate channel
1381 * this is a noop as those rates sets are different
1382 * and used instead.
f186073c 1383 */
32176cfd
RP
1384 if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B)
1385 ieee80211_setbasicrates(&ic->ic_sup_rates[mode], mode);
f186073c
JS
1386
1387 ic->ic_curmode = mode;
841ab66c 1388 ieee80211_reset_erp(ic); /* reset ERP state */
841ab66c 1389
f186073c 1390 return 0;
f186073c
JS
1391}
1392
1393/*
32176cfd 1394 * Return the phy mode for with the specified channel.
f186073c
JS
1395 */
1396enum ieee80211_phymode
32176cfd 1397ieee80211_chan2mode(const struct ieee80211_channel *chan)
f186073c 1398{
32176cfd
RP
1399
1400 if (IEEE80211_IS_CHAN_HTA(chan))
1401 return IEEE80211_MODE_11NA;
1402 else if (IEEE80211_IS_CHAN_HTG(chan))
1403 return IEEE80211_MODE_11NG;
1404 else if (IEEE80211_IS_CHAN_108G(chan))
1405 return IEEE80211_MODE_TURBO_G;
1406 else if (IEEE80211_IS_CHAN_ST(chan))
1407 return IEEE80211_MODE_STURBO_A;
1408 else if (IEEE80211_IS_CHAN_TURBO(chan))
841ab66c 1409 return IEEE80211_MODE_TURBO_A;
32176cfd
RP
1410 else if (IEEE80211_IS_CHAN_HALF(chan))
1411 return IEEE80211_MODE_HALF;
1412 else if (IEEE80211_IS_CHAN_QUARTER(chan))
1413 return IEEE80211_MODE_QUARTER;
1414 else if (IEEE80211_IS_CHAN_A(chan))
f186073c 1415 return IEEE80211_MODE_11A;
32176cfd 1416 else if (IEEE80211_IS_CHAN_ANYG(chan))
f186073c 1417 return IEEE80211_MODE_11G;
32176cfd 1418 else if (IEEE80211_IS_CHAN_B(chan))
f186073c 1419 return IEEE80211_MODE_11B;
32176cfd
RP
1420 else if (IEEE80211_IS_CHAN_FHSS(chan))
1421 return IEEE80211_MODE_FH;
1422
1423 /* NB: should not get here */
1424 kprintf("%s: cannot map channel to mode; freq %u flags 0x%x\n",
1425 __func__, chan->ic_freq, chan->ic_flags);
1426 return IEEE80211_MODE_11B;
1427}
1428
1429struct ratemedia {
1430 u_int match; /* rate + mode */
1431 u_int media; /* if_media rate */
1432};
1433
1434static int
1435findmedia(const struct ratemedia rates[], int n, u_int match)
1436{
1437 int i;
1438
1439 for (i = 0; i < n; i++)
1440 if (rates[i].match == match)
1441 return rates[i].media;
1442 return IFM_AUTO;
f186073c
JS
1443}
1444
1445/*
32176cfd
RP
1446 * Convert IEEE80211 rate value to ifmedia subtype.
1447 * Rate is either a legacy rate in units of 0.5Mbps
1448 * or an MCS index.
f186073c
JS
1449 */
1450int
1451ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode)
1452{
1453#define N(a) (sizeof(a) / sizeof(a[0]))
32176cfd 1454 static const struct ratemedia rates[] = {
f186073c
JS
1455 { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 },
1456 { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 },
1457 { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 },
1458 { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 },
1459 { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 },
1460 { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 },
1461 { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 },
1462 { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 },
1463 { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 },
1464 { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 },
1465 { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 },
1466 { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 },
1467 { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 },
1468 { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 },
1469 { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 },
1470 { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 },
1471 { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 },
1472 { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 },
1473 { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 },
1474 { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 },
1475 { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 },
1476 { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 },
1477 { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 },
1478 { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 },
1479 { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 },
1480 { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 },
1481 { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 },
32176cfd
RP
1482 { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 },
1483 { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 },
1484 { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 },
f186073c
JS
1485 /* NB: OFDM72 doesn't realy exist so we don't handle it */
1486 };
32176cfd
RP
1487 static const struct ratemedia htrates[] = {
1488 { 0, IFM_IEEE80211_MCS },
1489 { 1, IFM_IEEE80211_MCS },
1490 { 2, IFM_IEEE80211_MCS },
1491 { 3, IFM_IEEE80211_MCS },
1492 { 4, IFM_IEEE80211_MCS },
1493 { 5, IFM_IEEE80211_MCS },
1494 { 6, IFM_IEEE80211_MCS },
1495 { 7, IFM_IEEE80211_MCS },
1496 { 8, IFM_IEEE80211_MCS },
1497 { 9, IFM_IEEE80211_MCS },
1498 { 10, IFM_IEEE80211_MCS },
1499 { 11, IFM_IEEE80211_MCS },
1500 { 12, IFM_IEEE80211_MCS },
1501 { 13, IFM_IEEE80211_MCS },
1502 { 14, IFM_IEEE80211_MCS },
1503 { 15, IFM_IEEE80211_MCS },
1504 };
1505 int m;
f186073c 1506
32176cfd
RP
1507 /*
1508 * Check 11n rates first for match as an MCS.
1509 */
1510 if (mode == IEEE80211_MODE_11NA) {
1511 if (rate & IEEE80211_RATE_MCS) {
1512 rate &= ~IEEE80211_RATE_MCS;
1513 m = findmedia(htrates, N(htrates), rate);
1514 if (m != IFM_AUTO)
1515 return m | IFM_IEEE80211_11NA;
1516 }
1517 } else if (mode == IEEE80211_MODE_11NG) {
1518 /* NB: 12 is ambiguous, it will be treated as an MCS */
1519 if (rate & IEEE80211_RATE_MCS) {
1520 rate &= ~IEEE80211_RATE_MCS;
1521 m = findmedia(htrates, N(htrates), rate);
1522 if (m != IFM_AUTO)
1523 return m | IFM_IEEE80211_11NG;
1524 }
1525 }
1526 rate &= IEEE80211_RATE_VAL;
f186073c
JS
1527 switch (mode) {
1528 case IEEE80211_MODE_11A:
32176cfd
RP
1529 case IEEE80211_MODE_HALF: /* XXX good 'nuf */
1530 case IEEE80211_MODE_QUARTER:
1531 case IEEE80211_MODE_11NA:
841ab66c 1532 case IEEE80211_MODE_TURBO_A:
32176cfd
RP
1533 case IEEE80211_MODE_STURBO_A:
1534 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11A);
f186073c 1535 case IEEE80211_MODE_11B:
32176cfd 1536 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11B);
f186073c 1537 case IEEE80211_MODE_FH:
32176cfd 1538 return findmedia(rates, N(rates), rate | IFM_IEEE80211_FH);
f186073c
JS
1539 case IEEE80211_MODE_AUTO:
1540 /* NB: ic may be NULL for some drivers */
32176cfd
RP
1541 if (ic != NULL && ic->ic_phytype == IEEE80211_T_FH)
1542 return findmedia(rates, N(rates),
1543 rate | IFM_IEEE80211_FH);
f186073c
JS
1544 /* NB: hack, 11g matches both 11b+11a rates */
1545 /* fall thru... */
1546 case IEEE80211_MODE_11G:
32176cfd 1547 case IEEE80211_MODE_11NG:
841ab66c 1548 case IEEE80211_MODE_TURBO_G:
32176cfd 1549 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11G);
f186073c 1550 }
f186073c
JS
1551 return IFM_AUTO;
1552#undef N
1553}
1554
1555int
1556ieee80211_media2rate(int mword)
1557{
1558#define N(a) (sizeof(a) / sizeof(a[0]))
1559 static const int ieeerates[] = {
1560 -1, /* IFM_AUTO */
1561 0, /* IFM_MANUAL */
1562 0, /* IFM_NONE */
1563 2, /* IFM_IEEE80211_FH1 */
1564 4, /* IFM_IEEE80211_FH2 */
1565 2, /* IFM_IEEE80211_DS1 */
1566 4, /* IFM_IEEE80211_DS2 */
1567 11, /* IFM_IEEE80211_DS5 */
1568 22, /* IFM_IEEE80211_DS11 */
1569 44, /* IFM_IEEE80211_DS22 */
1570 12, /* IFM_IEEE80211_OFDM6 */
1571 18, /* IFM_IEEE80211_OFDM9 */
1572 24, /* IFM_IEEE80211_OFDM12 */
1573 36, /* IFM_IEEE80211_OFDM18 */
1574 48, /* IFM_IEEE80211_OFDM24 */
1575 72, /* IFM_IEEE80211_OFDM36 */
1576 96, /* IFM_IEEE80211_OFDM48 */
1577 108, /* IFM_IEEE80211_OFDM54 */
1578 144, /* IFM_IEEE80211_OFDM72 */
32176cfd
RP
1579 0, /* IFM_IEEE80211_DS354k */
1580 0, /* IFM_IEEE80211_DS512k */
1581 6, /* IFM_IEEE80211_OFDM3 */
1582 9, /* IFM_IEEE80211_OFDM4 */
1583 54, /* IFM_IEEE80211_OFDM27 */
1584 -1, /* IFM_IEEE80211_MCS */
f186073c
JS
1585 };
1586 return IFM_SUBTYPE(mword) < N(ieeerates) ?
1587 ieeerates[IFM_SUBTYPE(mword)] : 0;
1588#undef N
1589}
f467e28e
SZ
1590
1591/*
32176cfd
RP
1592 * The following hash function is adapted from "Hash Functions" by Bob Jenkins
1593 * ("Algorithm Alley", Dr. Dobbs Journal, September 1997).
f467e28e 1594 */
32176cfd
RP
1595#define mix(a, b, c) \
1596do { \
1597 a -= b; a -= c; a ^= (c >> 13); \
1598 b -= c; b -= a; b ^= (a << 8); \
1599 c -= a; c -= b; c ^= (b >> 13); \
1600 a -= b; a -= c; a ^= (c >> 12); \
1601 b -= c; b -= a; b ^= (a << 16); \
1602 c -= a; c -= b; c ^= (b >> 5); \
1603 a -= b; a -= c; a ^= (c >> 3); \
1604 b -= c; b -= a; b ^= (a << 10); \
1605 c -= a; c -= b; c ^= (b >> 15); \
1606} while (/*CONSTCOND*/0)
1607
1608uint32_t
1609ieee80211_mac_hash(const struct ieee80211com *ic,
1610 const uint8_t addr[IEEE80211_ADDR_LEN])
f467e28e 1611{
32176cfd 1612 uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = ic->ic_hash_key;
0dba45fe 1613
32176cfd
RP
1614 b += addr[5] << 8;
1615 b += addr[4];
1616 a += addr[3] << 24;
1617 a += addr[2] << 16;
1618 a += addr[1] << 8;
1619 a += addr[0];
0dba45fe 1620
32176cfd
RP
1621 mix(a, b, c);
1622
1623 return c;
0dba45fe 1624}
32176cfd 1625#undef mix