1 /*-
2 * Copyright (c) 2001 Atsushi Onoe
3 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting
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.
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 */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD: head/sys/net80211/ieee80211.c 198988 2009-11-06 14:55:01Z jhb $");
29
30 /*
31 * IEEE 802.11 generic handler
32 */
33 #include "opt_wlan.h"
34
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/kernel.h>
38
39 #include <sys/socket.h>
40
41 #include <net/if.h>
42 #include <net/if_dl.h>
43 #include <net/if_media.h>
44 #include <net/if_types.h>
45 #include <net/ethernet.h>
46
47 #include <net80211/ieee80211_var.h>
48 #include <net80211/ieee80211_regdomain.h>
49 #ifdef IEEE80211_SUPPORT_SUPERG
50 #include <net80211/ieee80211_superg.h>
51 #endif
52
53 #include <net/bpf.h>
54
55 const char *ieee80211_phymode_name[IEEE80211_MODE_MAX] = {
56 [IEEE80211_MODE_AUTO] = "auto",
57 [IEEE80211_MODE_11A] = "11a",
58 [IEEE80211_MODE_11B] = "11b",
59 [IEEE80211_MODE_11G] = "11g",
60 [IEEE80211_MODE_FH] = "FH",
61 [IEEE80211_MODE_TURBO_A] = "turboA",
62 [IEEE80211_MODE_TURBO_G] = "turboG",
63 [IEEE80211_MODE_STURBO_A] = "sturboA",
64 [IEEE80211_MODE_HALF] = "half",
65 [IEEE80211_MODE_QUARTER] = "quarter",
66 [IEEE80211_MODE_11NA] = "11na",
67 [IEEE80211_MODE_11NG] = "11ng",
68 };
69 /* map ieee80211_opmode to the corresponding capability bit */
70 const int ieee80211_opcap[IEEE80211_OPMODE_MAX] = {
71 [IEEE80211_M_IBSS] = IEEE80211_C_IBSS,
72 [IEEE80211_M_WDS] = IEEE80211_C_WDS,
73 [IEEE80211_M_STA] = IEEE80211_C_STA,
74 [IEEE80211_M_AHDEMO] = IEEE80211_C_AHDEMO,
75 [IEEE80211_M_HOSTAP] = IEEE80211_C_HOSTAP,
76 [IEEE80211_M_MONITOR] = IEEE80211_C_MONITOR,
77 #ifdef IEEE80211_SUPPORT_MESH
78 [IEEE80211_M_MBSS] = IEEE80211_C_MBSS,
79 #endif
80 };
81
82 static const uint8_t ieee80211broadcastaddr[IEEE80211_ADDR_LEN] =
83 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
84
85 static void ieee80211_syncflag_locked(struct ieee80211com *ic, int flag);
86 static void ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag);
87 static void ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag);
88 static int ieee80211_media_setup(struct ieee80211com *ic,
89 struct ifmedia *media, int caps, int addsta,
90 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat);
91 static void ieee80211com_media_status(struct ifnet *, struct ifmediareq *);
92 static int ieee80211com_media_change(struct ifnet *);
93 static int media_status(enum ieee80211_opmode,
94 const struct ieee80211_channel *);
95
96 MALLOC_DEFINE(M_80211_VAP, "80211vap", "802.11 vap state");
97
98 /*
99 * Default supported rates for 802.11 operation (in IEEE .5Mb units).
100 */
101 #define B(r) ((r) | IEEE80211_RATE_BASIC)
102 static const struct ieee80211_rateset ieee80211_rateset_11a =
103 { 8, { B(12), 18, B(24), 36, B(48), 72, 96, 108 } };
104 static const struct ieee80211_rateset ieee80211_rateset_half =
105 { 8, { B(6), 9, B(12), 18, B(24), 36, 48, 54 } };
106 static const struct ieee80211_rateset ieee80211_rateset_quarter =
107 { 8, { B(3), 4, B(6), 9, B(12), 18, 24, 27 } };
108 static const struct ieee80211_rateset ieee80211_rateset_11b =
109 { 4, { B(2), B(4), B(11), B(22) } };
110 /* NB: OFDM rates are handled specially based on mode */
111 static const struct ieee80211_rateset ieee80211_rateset_11g =
112 { 12, { B(2), B(4), B(11), B(22), 12, 18, 24, 36, 48, 72, 96, 108 } };
113 #undef B
114
115 /*
116 * Fill in 802.11 available channel set, mark
117 * all available channels as active, and pick
118 * a default channel if not already specified.
119 */
120 static void
121 ieee80211_chan_init(struct ieee80211com *ic)
122 {
123 #define DEFAULTRATES(m, def) do { \
124 if (ic->ic_sup_rates[m].rs_nrates == 0) \
125 ic->ic_sup_rates[m] = def; \
126 } while (0)
127 struct ieee80211_channel *c;
128 int i;
129
130 KASSERT(0 < ic->ic_nchans && ic->ic_nchans <= IEEE80211_CHAN_MAX,
131 ("invalid number of channels specified: %u", ic->ic_nchans));
132 memset(ic->ic_chan_avail, 0, sizeof(ic->ic_chan_avail));
133 memset(ic->ic_modecaps, 0, sizeof(ic->ic_modecaps));
134 setbit(ic->ic_modecaps, IEEE80211_MODE_AUTO);
135 for (i = 0; i < ic->ic_nchans; i++) {
136 c = &ic->ic_channels[i];
137 KASSERT(c->ic_flags != 0, ("channel with no flags"));
138 /*
139 * Help drivers that work only with frequencies by filling
140 * in IEEE channel #'s if not already calculated. Note this
141 * mimics similar work done in ieee80211_setregdomain when
142 * changing regulatory state.
143 */
144 if (c->ic_ieee == 0)
145 c->ic_ieee = ieee80211_mhz2ieee(c->ic_freq,c->ic_flags);
146 if (IEEE80211_IS_CHAN_HT40(c) && c->ic_extieee == 0)
147 c->ic_extieee = ieee80211_mhz2ieee(c->ic_freq +
148 (IEEE80211_IS_CHAN_HT40U(c) ? 20 : -20),
149 c->ic_flags);
150 /* default max tx power to max regulatory */
151 if (c->ic_maxpower == 0)
152 c->ic_maxpower = 2*c->ic_maxregpower;
153 setbit(ic->ic_chan_avail, c->ic_ieee);
154 /*
155 * Identify mode capabilities.
156 */
157 if (IEEE80211_IS_CHAN_A(c))
158 setbit(ic->ic_modecaps, IEEE80211_MODE_11A);
159 if (IEEE80211_IS_CHAN_B(c))
160 setbit(ic->ic_modecaps, IEEE80211_MODE_11B);
161 if (IEEE80211_IS_CHAN_ANYG(c))
162 setbit(ic->ic_modecaps, IEEE80211_MODE_11G);
163 if (IEEE80211_IS_CHAN_FHSS(c))
164 setbit(ic->ic_modecaps, IEEE80211_MODE_FH);
165 if (IEEE80211_IS_CHAN_108A(c))
166 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_A);
167 if (IEEE80211_IS_CHAN_108G(c))
168 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_G);
169 if (IEEE80211_IS_CHAN_ST(c))
170 setbit(ic->ic_modecaps, IEEE80211_MODE_STURBO_A);
171 if (IEEE80211_IS_CHAN_HALF(c))
172 setbit(ic->ic_modecaps, IEEE80211_MODE_HALF);
173 if (IEEE80211_IS_CHAN_QUARTER(c))
174 setbit(ic->ic_modecaps, IEEE80211_MODE_QUARTER);
175 if (IEEE80211_IS_CHAN_HTA(c))
176 setbit(ic->ic_modecaps, IEEE80211_MODE_11NA);
177 if (IEEE80211_IS_CHAN_HTG(c))
178 setbit(ic->ic_modecaps, IEEE80211_MODE_11NG);
179 }
180 /* initialize candidate channels to all available */
181 memcpy(ic->ic_chan_active, ic->ic_chan_avail,
182 sizeof(ic->ic_chan_avail));
183
184 /* sort channel table to allow lookup optimizations */
185 ieee80211_sort_channels(ic->ic_channels, ic->ic_nchans);
186
187 /* invalidate any previous state */
188 ic->ic_bsschan = IEEE80211_CHAN_ANYC;
189 ic->ic_prevchan = NULL;
190 ic->ic_csa_newchan = NULL;
191 /* arbitrarily pick the first channel */
192 ic->ic_curchan = &ic->ic_channels[0];
193 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
194
195 /* fillin well-known rate sets if driver has not specified */
196 DEFAULTRATES(IEEE80211_MODE_11B, ieee80211_rateset_11b);
197 DEFAULTRATES(IEEE80211_MODE_11G, ieee80211_rateset_11g);
198 DEFAULTRATES(IEEE80211_MODE_11A, ieee80211_rateset_11a);
199 DEFAULTRATES(IEEE80211_MODE_TURBO_A, ieee80211_rateset_11a);
200 DEFAULTRATES(IEEE80211_MODE_TURBO_G, ieee80211_rateset_11g);
201 DEFAULTRATES(IEEE80211_MODE_STURBO_A, ieee80211_rateset_11a);
202 DEFAULTRATES(IEEE80211_MODE_HALF, ieee80211_rateset_half);
203 DEFAULTRATES(IEEE80211_MODE_QUARTER, ieee80211_rateset_quarter);
204 DEFAULTRATES(IEEE80211_MODE_11NA, ieee80211_rateset_11a);
205 DEFAULTRATES(IEEE80211_MODE_11NG, ieee80211_rateset_11g);
206
207 /*
208 * Set auto mode to reset active channel state and any desired channel.
209 */
210 (void) ieee80211_setmode(ic, IEEE80211_MODE_AUTO);
211 #undef DEFAULTRATES
212 }
213
214 static void
215 null_update_mcast(struct ifnet *ifp)
216 {
217 if_printf(ifp, "need multicast update callback\n");
218 }
219
220 static void
221 null_update_promisc(struct ifnet *ifp)
222 {
223 if_printf(ifp, "need promiscuous mode update callback\n");
224 }
225
226 static int
227 null_transmit(struct ifnet *ifp, struct mbuf *m)
228 {
229 m_freem(m);
230 ifp->if_oerrors++;
231 return EACCES; /* XXX EIO/EPERM? */
232 }
233
234 static int
235 null_output(struct ifnet *ifp, struct mbuf *m,
236 struct sockaddr *dst, struct route *ro)
237 {
238 if_printf(ifp, "discard raw packet\n");
239 return null_transmit(ifp, m);
240 }
241
242 static void
243 null_input(struct ifnet *ifp, struct mbuf *m)
244 {
245 if_printf(ifp, "if_input should not be called\n");
246 m_freem(m);
247 }
248
249 /*
250 * Attach/setup the common net80211 state. Called by
251 * the driver on attach to prior to creating any vap's.
252 */
253 void
254 ieee80211_ifattach(struct ieee80211com *ic,
255 const uint8_t macaddr[IEEE80211_ADDR_LEN])
256 {
257 struct ifnet *ifp = ic->ic_ifp;
258 struct sockaddr_dl *sdl;
259 struct ifaddr *ifa;
260
261 KASSERT(ifp->if_type == IFT_IEEE80211, ("if_type %d", ifp->if_type));
262
263 IEEE80211_LOCK_INIT(ic, ifp->if_xname);
264 TAILQ_INIT(&ic->ic_vaps);
265
266 /* Create a taskqueue for all state changes */
267 ic->ic_tq = taskqueue_create("ic_taskq", M_WAITOK | M_ZERO,
268 taskqueue_thread_enqueue, &ic->ic_tq);
269 taskqueue_start_threads(&ic->ic_tq, 1, PI_NET, "%s taskq",
270 ifp->if_xname);
271 /*
272 * Fill in 802.11 available channel set, mark all
273 * available channels as active, and pick a default
274 * channel if not already specified.
275 */
276 ieee80211_media_init(ic);
277
278 ic->ic_update_mcast = null_update_mcast;
279 ic->ic_update_promisc = null_update_promisc;
280
281 ic->ic_hash_key = arc4random();
282 ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT;
283 ic->ic_lintval = ic->ic_bintval;
284 ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX;
285
286 ieee80211_crypto_attach(ic);
287 ieee80211_node_attach(ic);
288 ieee80211_power_attach(ic);
289 ieee80211_proto_attach(ic);
290 #ifdef IEEE80211_SUPPORT_SUPERG
291 ieee80211_superg_attach(ic);
292 #endif
293 ieee80211_ht_attach(ic);
294 ieee80211_scan_attach(ic);
295 ieee80211_regdomain_attach(ic);
296 ieee80211_dfs_attach(ic);
297
298 ieee80211_sysctl_attach(ic);
299
300 ifp->if_addrlen = IEEE80211_ADDR_LEN;
301 ifp->if_hdrlen = 0;
302 if_attach(ifp);
303 ifp->if_mtu = IEEE80211_MTU_MAX;
304 ifp->if_broadcastaddr = ieee80211broadcastaddr;
305 ifp->if_output = null_output;
306 ifp->if_input = null_input; /* just in case */
307 ifp->if_resolvemulti = NULL; /* NB: callers check */
308
309 ifa = ifaddr_byindex(ifp->if_index);
310 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__));
311 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
312 sdl->sdl_type = IFT_ETHER; /* XXX IFT_IEEE80211? */
313 sdl->sdl_alen = IEEE80211_ADDR_LEN;
314 IEEE80211_ADDR_COPY(LLADDR(sdl), macaddr);
315 ifa_free(ifa);
316 }
317
318 /*
319 * Detach net80211 state on device detach. Tear down
320 * all vap's and reclaim all common state prior to the
321 * device state going away. Note we may call back into
322 * driver; it must be prepared for this.
323 */
324 void
325 ieee80211_ifdetach(struct ieee80211com *ic)
326 {
327 struct ifnet *ifp = ic->ic_ifp;
328 struct ieee80211vap *vap;
329
330 if_detach(ifp);
331
332 while ((vap = TAILQ_FIRST(&ic->ic_vaps)) != NULL)
333 ieee80211_vap_destroy(vap);
334 ieee80211_waitfor_parent(ic);
335
336 ieee80211_sysctl_detach(ic);
337 ieee80211_dfs_detach(ic);
338 ieee80211_regdomain_detach(ic);
339 ieee80211_scan_detach(ic);
340 #ifdef IEEE80211_SUPPORT_SUPERG
341 ieee80211_superg_detach(ic);
342 #endif
343 ieee80211_ht_detach(ic);
344 /* NB: must be called before ieee80211_node_detach */
345 ieee80211_proto_detach(ic);
346 ieee80211_crypto_detach(ic);
347 ieee80211_power_detach(ic);
348 ieee80211_node_detach(ic);
349
350 ifmedia_removeall(&ic->ic_media);
351 taskqueue_free(ic->ic_tq);
352 IEEE80211_LOCK_DESTROY(ic);
353 }
354
355 /*
356 * Default reset method for use with the ioctl support. This
357 * method is invoked after any state change in the 802.11
358 * layer that should be propagated to the hardware but not
359 * require re-initialization of the 802.11 state machine (e.g
360 * rescanning for an ap). We always return ENETRESET which
361 * should cause the driver to re-initialize the device. Drivers
362 * can override this method to implement more optimized support.
363 */
364 static int
365 default_reset(struct ieee80211vap *vap, u_long cmd)
366 {
367 return ENETRESET;
368 }
369
370 /*
371 * Prepare a vap for use. Drivers use this call to
372 * setup net80211 state in new vap's prior attaching
373 * them with ieee80211_vap_attach (below).
374 */
375 int
376 ieee80211_vap_setup(struct ieee80211com *ic, struct ieee80211vap *vap,
377 const char name[IFNAMSIZ], int unit, int opmode, int flags,
378 const uint8_t bssid[IEEE80211_ADDR_LEN],
379 const uint8_t macaddr[IEEE80211_ADDR_LEN])
380 {
381 struct ifnet *ifp;
382
383 ifp = if_alloc(IFT_ETHER);
384 if (ifp == NULL) {
385 if_printf(ic->ic_ifp, "%s: unable to allocate ifnet\n",
386 __func__);
387 return ENOMEM;
388 }
389 if_initname(ifp, name, unit);
390 ifp->if_softc = vap; /* back pointer */
391 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST;
392 ifp->if_start = ieee80211_start;
393 ifp->if_ioctl = ieee80211_ioctl;
394 ifp->if_init = ieee80211_init;
395 /* NB: input+output filled in by ether_ifattach */
396 IFQ_SET_MAXLEN(&ifp->if_snd, IFQ_MAXLEN);
397 ifp->if_snd.ifq_drv_maxlen = IFQ_MAXLEN;
398 IFQ_SET_READY(&ifp->if_snd);
399
400 vap->iv_ifp = ifp;
401 vap->iv_ic = ic;
402 vap->iv_flags = ic->ic_flags; /* propagate common flags */
403 vap->iv_flags_ext = ic->ic_flags_ext;
404 vap->iv_flags_ven = ic->ic_flags_ven;
405 vap->iv_caps = ic->ic_caps &~ IEEE80211_C_OPMODE;
406 vap->iv_htcaps = ic->ic_htcaps;
407 vap->iv_opmode = opmode;
408 vap->iv_caps |= ieee80211_opcap[opmode];
409 switch (opmode) {
410 case IEEE80211_M_WDS:
411 /*
412 * WDS links must specify the bssid of the far end.
413 * For legacy operation this is a static relationship.
414 * For non-legacy operation the station must associate
415 * and be authorized to pass traffic. Plumbing the
416 * vap to the proper node happens when the vap
417 * transitions to RUN state.
418 */
419 IEEE80211_ADDR_COPY(vap->iv_des_bssid, bssid);
420 vap->iv_flags |= IEEE80211_F_DESBSSID;
421 if (flags & IEEE80211_CLONE_WDSLEGACY)
422 vap->iv_flags_ext |= IEEE80211_FEXT_WDSLEGACY;
423 break;
424 #ifdef IEEE80211_SUPPORT_TDMA
425 case IEEE80211_M_AHDEMO:
426 if (flags & IEEE80211_CLONE_TDMA) {
427 /* NB: checked before clone operation allowed */
428 KASSERT(ic->ic_caps & IEEE80211_C_TDMA,
429 ("not TDMA capable, ic_caps 0x%x", ic->ic_caps));
430 /*
431 * Propagate TDMA capability to mark vap; this
432 * cannot be removed and is used to distinguish
433 * regular ahdemo operation from ahdemo+tdma.
434 */
435 vap->iv_caps |= IEEE80211_C_TDMA;
436 }
437 break;
438 #endif
439 }
440 /* auto-enable s/w beacon miss support */
441 if (flags & IEEE80211_CLONE_NOBEACONS)
442 vap->iv_flags_ext |= IEEE80211_FEXT_SWBMISS;
443 /*
444 * Enable various functionality by default if we're
445 * capable; the driver can override us if it knows better.
446 */
447 if (vap->iv_caps & IEEE80211_C_WME)
448 vap->iv_flags |= IEEE80211_F_WME;
449 if (vap->iv_caps & IEEE80211_C_BURST)
450 vap->iv_flags |= IEEE80211_F_BURST;
451 /* NB: bg scanning only makes sense for station mode right now */
452 if (vap->iv_opmode == IEEE80211_M_STA &&
453 (vap->iv_caps & IEEE80211_C_BGSCAN))
454 vap->iv_flags |= IEEE80211_F_BGSCAN;
455 vap->iv_flags |= IEEE80211_F_DOTH; /* XXX no cap, just ena */
456 /* NB: DFS support only makes sense for ap mode right now */
457 if (vap->iv_opmode == IEEE80211_M_HOSTAP &&
458 (vap->iv_caps & IEEE80211_C_DFS))
459 vap->iv_flags_ext |= IEEE80211_FEXT_DFS;
460
461 vap->iv_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */
462 vap->iv_bmissthreshold = IEEE80211_HWBMISS_DEFAULT;
463 vap->iv_dtim_period = IEEE80211_DTIM_DEFAULT;
464 /*
465 * Install a default reset method for the ioctl support;
466 * the driver can override this.
467 */
468 vap->iv_reset = default_reset;
469
470 IEEE80211_ADDR_COPY(vap->iv_myaddr, macaddr);
471
472 ieee80211_sysctl_vattach(vap);
473 ieee80211_crypto_vattach(vap);
474 ieee80211_node_vattach(vap);
475 ieee80211_power_vattach(vap);
476 ieee80211_proto_vattach(vap);
477 #ifdef IEEE80211_SUPPORT_SUPERG
478 ieee80211_superg_vattach(vap);
479 #endif
480 ieee80211_ht_vattach(vap);
481 ieee80211_scan_vattach(vap);
482 ieee80211_regdomain_vattach(vap);
483 ieee80211_radiotap_vattach(vap);
484
485 return 0;
486 }
487
488 /*
489 * Activate a vap. State should have been prepared with a
490 * call to ieee80211_vap_setup and by the driver. On return
491 * from this call the vap is ready for use.
492 */
493 int
494 ieee80211_vap_attach(struct ieee80211vap *vap,
495 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat)
496 {
497 struct ifnet *ifp = vap->iv_ifp;
498 struct ieee80211com *ic = vap->iv_ic;
499 struct ifmediareq imr;
500 int maxrate;
501
502 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
503 "%s: %s parent %s flags 0x%x flags_ext 0x%x\n",
504 __func__, ieee80211_opmode_name[vap->iv_opmode],
505 ic->ic_ifp->if_xname, vap->iv_flags, vap->iv_flags_ext);
506
507 /*
508 * Do late attach work that cannot happen until after
509 * the driver has had a chance to override defaults.
510 */
511 ieee80211_node_latevattach(vap);
512 ieee80211_power_latevattach(vap);
513
514 maxrate = ieee80211_media_setup(ic, &vap->iv_media, vap->iv_caps,
515 vap->iv_opmode == IEEE80211_M_STA, media_change, media_stat);
516 ieee80211_media_status(ifp, &imr);
517 /* NB: strip explicit mode; we're actually in autoselect */
518 ifmedia_set(&vap->iv_media,
519 imr.ifm_active &~ (IFM_MMASK | IFM_IEEE80211_TURBO));
520 if (maxrate)
521 ifp->if_baudrate = IF_Mbps(maxrate);
522
523 ether_ifattach(ifp, vap->iv_myaddr);
524 if (vap->iv_opmode == IEEE80211_M_MONITOR) {
525 /* NB: disallow transmit */
526 ifp->if_transmit = null_transmit;
527 ifp->if_output = null_output;
528 } else {
529 /* hook output method setup by ether_ifattach */
530 vap->iv_output = ifp->if_output;
531 ifp->if_output = ieee80211_output;
532 }
533 /* NB: if_mtu set by ether_ifattach to ETHERMTU */
534
535 IEEE80211_LOCK(ic);
536 TAILQ_INSERT_TAIL(&ic->ic_vaps, vap, iv_next);
537 ieee80211_syncflag_locked(ic, IEEE80211_F_WME);
538 #ifdef IEEE80211_SUPPORT_SUPERG
539 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP);
540 #endif
541 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF);
542 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST);
543 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT);
544 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40);
545 ieee80211_syncifflag_locked(ic, IFF_PROMISC);
546 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI);
547 IEEE80211_UNLOCK(ic);
548
549 return 1;
550 }
551
552 /*
553 * Tear down vap state and reclaim the ifnet.
554 * The driver is assumed to have prepared for
555 * this; e.g. by turning off interrupts for the
556 * underlying device.
557 */
558 void
559 ieee80211_vap_detach(struct ieee80211vap *vap)
560 {
561 struct ieee80211com *ic = vap->iv_ic;
562 struct ifnet *ifp = vap->iv_ifp;
563
564 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s parent %s\n",
565 __func__, ieee80211_opmode_name[vap->iv_opmode],
566 ic->ic_ifp->if_xname);
567
568 /* NB: bpfdetach is called by ether_ifdetach and claims all taps */
569 ether_ifdetach(ifp);
570
571 ieee80211_stop(vap);
572
573 /*
574 * Flush any deferred vap tasks.
575 */
576 ieee80211_draintask(ic, &vap->iv_nstate_task);
577 ieee80211_draintask(ic, &vap->iv_swbmiss_task);
578
579 /* XXX band-aid until ifnet handles this for us */
580 taskqueue_drain(taskqueue_swi, &ifp->if_linktask);
581
582 IEEE80211_LOCK(ic);
583 KASSERT(vap->iv_state == IEEE80211_S_INIT , ("vap still running"));
584 TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next);
585 ieee80211_syncflag_locked(ic, IEEE80211_F_WME);
586 #ifdef IEEE80211_SUPPORT_SUPERG
587 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP);
588 #endif
589 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF);
590 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST);
591 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT);
592 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40);
593 /* NB: this handles the bpfdetach done below */
594 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_BPF);
595 ieee80211_syncifflag_locked(ic, IFF_PROMISC);
596 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI);
597 IEEE80211_UNLOCK(ic);
598
599 ifmedia_removeall(&vap->iv_media);
600
601 ieee80211_radiotap_vdetach(vap);
602 ieee80211_regdomain_vdetach(vap);
603 ieee80211_scan_vdetach(vap);
604 #ifdef IEEE80211_SUPPORT_SUPERG
605 ieee80211_superg_vdetach(vap);
606 #endif
607 ieee80211_ht_vdetach(vap);
608 /* NB: must be before ieee80211_node_vdetach */
609 ieee80211_proto_vdetach(vap);
610 ieee80211_crypto_vdetach(vap);
611 ieee80211_power_vdetach(vap);
612 ieee80211_node_vdetach(vap);
613 ieee80211_sysctl_vdetach(vap);
614
615 if_free(ifp);
616 }
617
618 /*
619 * Synchronize flag bit state in the parent ifnet structure
620 * according to the state of all vap ifnet's. This is used,
621 * for example, to handle IFF_PROMISC and IFF_ALLMULTI.
622 */
623 void
624 ieee80211_syncifflag_locked(struct ieee80211com *ic, int flag)
625 {
626 struct ifnet *ifp = ic->ic_ifp;
627 struct ieee80211vap *vap;
628 int bit, oflags;
629
630 IEEE80211_LOCK_ASSERT(ic);
631
632 bit = 0;
633 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
634 if (vap->iv_ifp->if_flags & flag) {
635 /*
636 * XXX the bridge sets PROMISC but we don't want to
637 * enable it on the device, discard here so all the
638 * drivers don't need to special-case it
639 */
640 if (flag == IFF_PROMISC &&
641 !(vap->iv_opmode == IEEE80211_M_MONITOR ||
642 (vap->iv_opmode == IEEE80211_M_AHDEMO &&
643 (vap->iv_caps & IEEE80211_C_TDMA) == 0)))
644 continue;
645 bit = 1;
646 break;
647 }
648 oflags = ifp->if_flags;
649 if (bit)
650 ifp->if_flags |= flag;
651 else
652 ifp->if_flags &= ~flag;
653 if ((ifp->if_flags ^ oflags) & flag) {
654 /* XXX should we return 1/0 and let caller do this? */
655 if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
656 if (flag == IFF_PROMISC)
657 ieee80211_runtask(ic, &ic->ic_promisc_task);
658 else if (flag == IFF_ALLMULTI)
659 ieee80211_runtask(ic, &ic->ic_mcast_task);
660 }
661 }
662 }
663
664 /*
665 * Synchronize flag bit state in the com structure
666 * according to the state of all vap's. This is used,
667 * for example, to handle state changes via ioctls.
668 */
669 static void
670 ieee80211_syncflag_locked(struct ieee80211com *ic, int flag)
671 {
672 struct ieee80211vap *vap;
673 int bit;
674
675 IEEE80211_LOCK_ASSERT(ic);
676
677 bit = 0;
678 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
679 if (vap->iv_flags & flag) {
680 bit = 1;
681 break;
682 }
683 if (bit)
684 ic->ic_flags |= flag;
685 else
686 ic->ic_flags &= ~flag;
687 }
688
689 void
690 ieee80211_syncflag(struct ieee80211vap *vap, int flag)
691 {
692 struct ieee80211com *ic = vap->iv_ic;
693
694 IEEE80211_LOCK(ic);
695 if (flag < 0) {
696 flag = -flag;
697 vap->iv_flags &= ~flag;
698 } else
699 vap->iv_flags |= flag;
700 ieee80211_syncflag_locked(ic, flag);
701 IEEE80211_UNLOCK(ic);
702 }
703
704 /*
705 * Synchronize flags_ht bit state in the com structure
706 * according to the state of all vap's. This is used,
707 * for example, to handle state changes via ioctls.
708 */
709 static void
710 ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag)
711 {
712 struct ieee80211vap *vap;
713 int bit;
714
715 IEEE80211_LOCK_ASSERT(ic);
716
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
729 void
730 ieee80211_syncflag_ht(struct ieee80211vap *vap, int flag)
731 {
732 struct ieee80211com *ic = vap->iv_ic;
733
734 IEEE80211_LOCK(ic);
735 if (flag < 0) {
736 flag = -flag;
737 vap->iv_flags_ht &= ~flag;
738 } else
739 vap->iv_flags_ht |= flag;
740 ieee80211_syncflag_ht_locked(ic, flag);
741 IEEE80211_UNLOCK(ic);
742 }
743
744 /*
745 * Synchronize flags_ext bit state in the com structure
746 * according to the state of all vap's. This is used,
747 * for example, to handle state changes via ioctls.
748 */
749 static void
750 ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag)
751 {
752 struct ieee80211vap *vap;
753 int bit;
754
755 IEEE80211_LOCK_ASSERT(ic);
756
757 bit = 0;
758 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
759 if (vap->iv_flags_ext & flag) {
760 bit = 1;
761 break;
762 }
763 if (bit)
764 ic->ic_flags_ext |= flag;
765 else
766 ic->ic_flags_ext &= ~flag;
767 }
768
769 void
770 ieee80211_syncflag_ext(struct ieee80211vap *vap, int flag)
771 {
772 struct ieee80211com *ic = vap->iv_ic;
773
774 IEEE80211_LOCK(ic);
775 if (flag < 0) {
776 flag = -flag;
777 vap->iv_flags_ext &= ~flag;
778 } else
779 vap->iv_flags_ext |= flag;
780 ieee80211_syncflag_ext_locked(ic, flag);
781 IEEE80211_UNLOCK(ic);
782 }
783
784 static __inline int
785 mapgsm(u_int freq, u_int flags)
786 {
787 freq *= 10;
788 if (flags & IEEE80211_CHAN_QUARTER)
789 freq += 5;
790 else if (flags & IEEE80211_CHAN_HALF)
791 freq += 10;
792 else
793 freq += 20;
794 /* NB: there is no 907/20 wide but leave room */
795 return (freq - 906*10) / 5;
796 }
797
798 static __inline int
799 mappsb(u_int freq, u_int flags)
800 {
801 return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5;
802 }
803
804 /*
805 * Convert MHz frequency to IEEE channel number.
806 */
807 int
808 ieee80211_mhz2ieee(u_int freq, u_int flags)
809 {
810 #define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990)
811 if (flags & IEEE80211_CHAN_GSM)
812 return mapgsm(freq, flags);
813 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
814 if (freq == 2484)
815 return 14;
816 if (freq < 2484)
817 return ((int) freq - 2407) / 5;
818 else
819 return 15 + ((freq - 2512) / 20);
820 } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */
821 if (freq <= 5000) {
822 /* XXX check regdomain? */
823 if (IS_FREQ_IN_PSB(freq))
824 return mappsb(freq, flags);
825 return (freq - 4000) / 5;
826 } else
827 return (freq - 5000) / 5;
828 } else { /* either, guess */
829 if (freq == 2484)
830 return 14;
831 if (freq < 2484) {
832 if (907 <= freq && freq <= 922)
833 return mapgsm(freq, flags);
834 return ((int) freq - 2407) / 5;
835 }
836 if (freq < 5000) {
837 if (IS_FREQ_IN_PSB(freq))
838 return mappsb(freq, flags);
839 else if (freq > 4900)
840 return (freq - 4000) / 5;
841 else
842 return 15 + ((freq - 2512) / 20);
843 }
844 return (freq - 5000) / 5;
845 }
846 #undef IS_FREQ_IN_PSB
847 }
848
849 /*
850 * Convert channel to IEEE channel number.
851 */
852 int
853 ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c)
854 {
855 if (c == NULL) {
856 if_printf(ic->ic_ifp, "invalid channel (NULL)\n");
857 return 0; /* XXX */
858 }
859 return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee);
860 }
861
862 /*
863 * Convert IEEE channel number to MHz frequency.
864 */
865 u_int
866 ieee80211_ieee2mhz(u_int chan, u_int flags)
867 {
868 if (flags & IEEE80211_CHAN_GSM)
869 return 907 + 5 * (chan / 10);
870 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
871 if (chan == 14)
872 return 2484;
873 if (chan < 14)
874 return 2407 + chan*5;
875 else
876 return 2512 + ((chan-15)*20);
877 } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */
878 if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) {
879 chan -= 37;
880 return 4940 + chan*5 + (chan % 5 ? 2 : 0);
881 }
882 return 5000 + (chan*5);
883 } else { /* either, guess */
884 /* XXX can't distinguish PSB+GSM channels */
885 if (chan == 14)
886 return 2484;
887 if (chan < 14) /* 0-13 */
888 return 2407 + chan*5;
889 if (chan < 27) /* 15-26 */
890 return 2512 + ((chan-15)*20);
891 return 5000 + (chan*5);
892 }
893 }
894
895 /*
896 * Locate a channel given a frequency+flags. We cache
897 * the previous lookup to optimize switching between two
898 * channels--as happens with dynamic turbo.
899 */
900 struct ieee80211_channel *
901 ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags)
902 {
903 struct ieee80211_channel *c;
904 int i;
905
906 flags &= IEEE80211_CHAN_ALLTURBO;
907 c = ic->ic_prevchan;
908 if (c != NULL && c->ic_freq == freq &&
909 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
910 return c;
911 /* brute force search */
912 for (i = 0; i < ic->ic_nchans; i++) {
913 c = &ic->ic_channels[i];
914 if (c->ic_freq == freq &&
915 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
916 return c;
917 }
918 return NULL;
919 }
920
921 /*
922 * Locate a channel given a channel number+flags. We cache
923 * the previous lookup to optimize switching between two
924 * channels--as happens with dynamic turbo.
925 */
926 struct ieee80211_channel *
927 ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags)
928 {
929 struct ieee80211_channel *c;
930 int i;
931
932 flags &= IEEE80211_CHAN_ALLTURBO;
933 c = ic->ic_prevchan;
934 if (c != NULL && c->ic_ieee == ieee &&
935 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
936 return c;
937 /* brute force search */
938 for (i = 0; i < ic->ic_nchans; i++) {
939 c = &ic->ic_channels[i];
940 if (c->ic_ieee == ieee &&
941 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
942 return c;
943 }
944 return NULL;
945 }
946
947 static void
948 addmedia(struct ifmedia *media, int caps, int addsta, int mode, int mword)
949 {
950 #define ADD(_ic, _s, _o) \
951 ifmedia_add(media, \
952 IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL)
953 static const u_int mopts[IEEE80211_MODE_MAX] = {
954 [IEEE80211_MODE_AUTO] = IFM_AUTO,
955 [IEEE80211_MODE_11A] = IFM_IEEE80211_11A,
956 [IEEE80211_MODE_11B] = IFM_IEEE80211_11B,
957 [IEEE80211_MODE_11G] = IFM_IEEE80211_11G,
958 [IEEE80211_MODE_FH] = IFM_IEEE80211_FH,
959 [IEEE80211_MODE_TURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO,
960 [IEEE80211_MODE_TURBO_G] = IFM_IEEE80211_11G|IFM_IEEE80211_TURBO,
961 [IEEE80211_MODE_STURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO,
962 [IEEE80211_MODE_HALF] = IFM_IEEE80211_11A, /* XXX */
963 [IEEE80211_MODE_QUARTER] = IFM_IEEE80211_11A, /* XXX */
964 [IEEE80211_MODE_11NA] = IFM_IEEE80211_11NA,
965 [IEEE80211_MODE_11NG] = IFM_IEEE80211_11NG,
966 };
967 u_int mopt;
968
969 mopt = mopts[mode];
970 if (addsta)
971 ADD(ic, mword, mopt); /* STA mode has no cap */
972 if (caps & IEEE80211_C_IBSS)
973 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC);
974 if (caps & IEEE80211_C_HOSTAP)
975 ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP);
976 if (caps & IEEE80211_C_AHDEMO)
977 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0);
978 if (caps & IEEE80211_C_MONITOR)
979 ADD(media, mword, mopt | IFM_IEEE80211_MONITOR);
980 if (caps & IEEE80211_C_WDS)
981 ADD(media, mword, mopt | IFM_IEEE80211_WDS);
982 if (caps & IEEE80211_C_MBSS)
983 ADD(media, mword, mopt | IFM_IEEE80211_MBSS);
984 #undef ADD
985 }
986
987 /*
988 * Setup the media data structures according to the channel and
989 * rate tables.
990 */
991 static int
992 ieee80211_media_setup(struct ieee80211com *ic,
993 struct ifmedia *media, int caps, int addsta,
994 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat)
995 {
996 int i, j, mode, rate, maxrate, mword, r;
997 const struct ieee80211_rateset *rs;
998 struct ieee80211_rateset allrates;
999
1000 /*
1001 * Fill in media characteristics.
1002 */
1003 ifmedia_init(media, 0, media_change, media_stat);
1004 maxrate = 0;
1005 /*
1006 * Add media for legacy operating modes.
1007 */
1008 memset(&allrates, 0, sizeof(allrates));
1009 for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) {
1010 if (isclr(ic->ic_modecaps, mode))
1011 continue;
1012 addmedia(media, caps, addsta, mode, IFM_AUTO);
1013 if (mode == IEEE80211_MODE_AUTO)
1014 continue;
1015 rs = &ic->ic_sup_rates[mode];
1016 for (i = 0; i < rs->rs_nrates; i++) {
1017 rate = rs->rs_rates[i];
1018 mword = ieee80211_rate2media(ic, rate, mode);
1019 if (mword == 0)
1020 continue;
1021 addmedia(media, caps, addsta, mode, mword);
1022 /*
1023 * Add legacy rate to the collection of all rates.
1024 */
1025 r = rate & IEEE80211_RATE_VAL;
1026 for (j = 0; j < allrates.rs_nrates; j++)
1027 if (allrates.rs_rates[j] == r)
1028 break;
1029 if (j == allrates.rs_nrates) {
1030 /* unique, add to the set */
1031 allrates.rs_rates[j] = r;
1032 allrates.rs_nrates++;
1033 }
1034 rate = (rate & IEEE80211_RATE_VAL) / 2;
1035 if (rate > maxrate)
1036 maxrate = rate;
1037 }
1038 }
1039 for (i = 0; i < allrates.rs_nrates; i++) {
1040 mword = ieee80211_rate2media(ic, allrates.rs_rates[i],
1041 IEEE80211_MODE_AUTO);
1042 if (mword == 0)
1043 continue;
1044 /* NB: remove media options from mword */
1045 addmedia(media, caps, addsta,
1046 IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword));
1047 }
1048 /*
1049 * Add HT/11n media. Note that we do not have enough
1050 * bits in the media subtype to express the MCS so we
1051 * use a "placeholder" media subtype and any fixed MCS
1052 * must be specified with a different mechanism.
1053 */
1054 for (; mode <= IEEE80211_MODE_11NG; mode++) {
1055 if (isclr(ic->ic_modecaps, mode))
1056 continue;
1057 addmedia(media, caps, addsta, mode, IFM_AUTO);
1058 addmedia(media, caps, addsta, mode, IFM_IEEE80211_MCS);
1059 }
1060 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) ||
1061 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) {
1062 addmedia(media, caps, addsta,
1063 IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS);
1064 /* XXX could walk htrates */
1065 /* XXX known array size */
1066 if (ieee80211_htrates[15].ht40_rate_400ns > maxrate)
1067 maxrate = ieee80211_htrates[15].ht40_rate_400ns;
1068 }
1069 return maxrate;
1070 }
1071
1072 void
1073 ieee80211_media_init(struct ieee80211com *ic)
1074 {
1075 struct ifnet *ifp = ic->ic_ifp;
1076 int maxrate;
1077
1078 /* NB: this works because the structure is initialized to zero */
1079 if (!LIST_EMPTY(&ic->ic_media.ifm_list)) {
1080 /*
1081 * We are re-initializing the channel list; clear
1082 * the existing media state as the media routines
1083 * don't suppress duplicates.
1084 */
1085 ifmedia_removeall(&ic->ic_media);
1086 }
1087 ieee80211_chan_init(ic);
1088
1089 /*
1090 * Recalculate media settings in case new channel list changes
1091 * the set of available modes.
1092 */
1093 maxrate = ieee80211_media_setup(ic, &ic->ic_media, ic->ic_caps, 1,
1094 ieee80211com_media_change, ieee80211com_media_status);
1095 /* NB: strip explicit mode; we're actually in autoselect */
1096 ifmedia_set(&ic->ic_media,
1097 media_status(ic->ic_opmode, ic->ic_curchan) &~
1098 (IFM_MMASK | IFM_IEEE80211_TURBO));
1099 if (maxrate)
1100 ifp->if_baudrate = IF_Mbps(maxrate);
1101
1102 /* XXX need to propagate new media settings to vap's */
1103 }
1104
1105 /* XXX inline or eliminate? */
1106 const struct ieee80211_rateset *
1107 ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c)
1108 {
1109 /* XXX does this work for 11ng basic rates? */
1110 return &ic->ic_sup_rates[ieee80211_chan2mode(c)];
1111 }
1112
1113 void
1114 ieee80211_announce(struct ieee80211com *ic)
1115 {
1116 struct ifnet *ifp = ic->ic_ifp;
1117 int i, mode, rate, mword;
1118 const struct ieee80211_rateset *rs;
1119
1120 /* NB: skip AUTO since it has no rates */
1121 for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) {
1122 if (isclr(ic->ic_modecaps, mode))
1123 continue;
1124 if_printf(ifp, "%s rates: ", ieee80211_phymode_name[mode]);
1125 rs = &ic->ic_sup_rates[mode];
1126 for (i = 0; i < rs->rs_nrates; i++) {
1127 mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode);
1128 if (mword == 0)
1129 continue;
1130 rate = ieee80211_media2rate(mword);
1131 printf("%s%d%sMbps", (i != 0 ? " " : ""),
1132 rate / 2, ((rate & 0x1) != 0 ? ".5" : ""));
1133 }
1134 printf("\n");
1135 }
1136 ieee80211_ht_announce(ic);
1137 }
1138
1139 void
1140 ieee80211_announce_channels(struct ieee80211com *ic)
1141 {
1142 const struct ieee80211_channel *c;
1143 char type;
1144 int i, cw;
1145
1146 printf("Chan Freq CW RegPwr MinPwr MaxPwr\n");
1147 for (i = 0; i < ic->ic_nchans; i++) {
1148 c = &ic->ic_channels[i];
1149 if (IEEE80211_IS_CHAN_ST(c))
1150 type = 'S';
1151 else if (IEEE80211_IS_CHAN_108A(c))
1152 type = 'T';
1153 else if (IEEE80211_IS_CHAN_108G(c))
1154 type = 'G';
1155 else if (IEEE80211_IS_CHAN_HT(c))
1156 type = 'n';
1157 else if (IEEE80211_IS_CHAN_A(c))
1158 type = 'a';
1159 else if (IEEE80211_IS_CHAN_ANYG(c))
1160 type = 'g';
1161 else if (IEEE80211_IS_CHAN_B(c))
1162 type = 'b';
1163 else
1164 type = 'f';
1165 if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c))
1166 cw = 40;
1167 else if (IEEE80211_IS_CHAN_HALF(c))
1168 cw = 10;
1169 else if (IEEE80211_IS_CHAN_QUARTER(c))
1170 cw = 5;
1171 else
1172 cw = 20;
1173 printf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n"
1174 , c->ic_ieee, c->ic_freq, type
1175 , cw
1176 , IEEE80211_IS_CHAN_HT40U(c) ? '+' :
1177 IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' '
1178 , c->ic_maxregpower
1179 , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0
1180 , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0
1181 );
1182 }
1183 }
1184
1185 static int
1186 media2mode(const struct ifmedia_entry *ime, uint32_t flags, uint16_t *mode)
1187 {
1188 switch (IFM_MODE(ime->ifm_media)) {
1189 case IFM_IEEE80211_11A:
1190 *mode = IEEE80211_MODE_11A;
1191 break;
1192 case IFM_IEEE80211_11B:
1193 *mode = IEEE80211_MODE_11B;
1194 break;
1195 case IFM_IEEE80211_11G:
1196 *mode = IEEE80211_MODE_11G;
1197 break;
1198 case IFM_IEEE80211_FH:
1199 *mode = IEEE80211_MODE_FH;
1200 break;
1201 case IFM_IEEE80211_11NA:
1202 *mode = IEEE80211_MODE_11NA;
1203 break;
1204 case IFM_IEEE80211_11NG:
1205 *mode = IEEE80211_MODE_11NG;
1206 break;
1207 case IFM_AUTO:
1208 *mode = IEEE80211_MODE_AUTO;
1209 break;
1210 default:
1211 return 0;
1212 }
1213 /*
1214 * Turbo mode is an ``option''.
1215 * XXX does not apply to AUTO
1216 */
1217 if (ime->ifm_media & IFM_IEEE80211_TURBO) {
1218 if (*mode == IEEE80211_MODE_11A) {
1219 if (flags & IEEE80211_F_TURBOP)
1220 *mode = IEEE80211_MODE_TURBO_A;
1221 else
1222 *mode = IEEE80211_MODE_STURBO_A;
1223 } else if (*mode == IEEE80211_MODE_11G)
1224 *mode = IEEE80211_MODE_TURBO_G;
1225 else
1226 return 0;
1227 }
1228 /* XXX HT40 +/- */
1229 return 1;
1230 }
1231
1232 /*
1233 * Handle a media change request on the underlying interface.
1234 */
1235 int
1236 ieee80211com_media_change(struct ifnet *ifp)
1237 {
1238 return EINVAL;
1239 }
1240
1241 /*
1242 * Handle a media change request on the vap interface.
1243 */
1244 int
1245 ieee80211_media_change(struct ifnet *ifp)
1246 {
1247 struct ieee80211vap *vap = ifp->if_softc;
1248 struct ifmedia_entry *ime = vap->iv_media.ifm_cur;
1249 uint16_t newmode;
1250
1251 if (!media2mode(ime, vap->iv_flags, &newmode))
1252 return EINVAL;
1253 if (vap->iv_des_mode != newmode) {
1254 vap->iv_des_mode = newmode;
1255 /* XXX kick state machine if up+running */
1256 }
1257 return 0;
1258 }
1259
1260 /*
1261 * Common code to calculate the media status word
1262 * from the operating mode and channel state.
1263 */
1264 static int
1265 media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan)
1266 {
1267 int status;
1268
1269 status = IFM_IEEE80211;
1270 switch (opmode) {
1271 case IEEE80211_M_STA:
1272 break;
1273 case IEEE80211_M_IBSS:
1274 status |= IFM_IEEE80211_ADHOC;
1275 break;
1276 case IEEE80211_M_HOSTAP:
1277 status |= IFM_IEEE80211_HOSTAP;
1278 break;
1279 case IEEE80211_M_MONITOR:
1280 status |= IFM_IEEE80211_MONITOR;
1281 break;
1282 case IEEE80211_M_AHDEMO:
1283 status |= IFM_IEEE80211_ADHOC | IFM_FLAG0;
1284 break;
1285 case IEEE80211_M_WDS:
1286 status |= IFM_IEEE80211_WDS;
1287 break;
1288 case IEEE80211_M_MBSS:
1289 status |= IFM_IEEE80211_MBSS;
1290 break;
1291 }
1292 if (IEEE80211_IS_CHAN_HTA(chan)) {
1293 status |= IFM_IEEE80211_11NA;
1294 } else if (IEEE80211_IS_CHAN_HTG(chan)) {
1295 status |= IFM_IEEE80211_11NG;
1296 } else if (IEEE80211_IS_CHAN_A(chan)) {
1297 status |= IFM_IEEE80211_11A;
1298 } else if (IEEE80211_IS_CHAN_B(chan)) {
1299 status |= IFM_IEEE80211_11B;
1300 } else if (IEEE80211_IS_CHAN_ANYG(chan)) {
1301 status |= IFM_IEEE80211_11G;
1302 } else if (IEEE80211_IS_CHAN_FHSS(chan)) {
1303 status |= IFM_IEEE80211_FH;
1304 }
1305 /* XXX else complain? */
1306
1307 if (IEEE80211_IS_CHAN_TURBO(chan))
1308 status |= IFM_IEEE80211_TURBO;
1309 #if 0
1310 if (IEEE80211_IS_CHAN_HT20(chan))
1311 status |= IFM_IEEE80211_HT20;
1312 if (IEEE80211_IS_CHAN_HT40(chan))
1313 status |= IFM_IEEE80211_HT40;
1314 #endif
1315 return status;
1316 }
1317
1318 static void
1319 ieee80211com_media_status(struct ifnet *ifp, struct ifmediareq *imr)
1320 {
1321 struct ieee80211com *ic = ifp->if_l2com;
1322 struct ieee80211vap *vap;
1323
1324 imr->ifm_status = IFM_AVALID;
1325 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
1326 if (vap->iv_ifp->if_flags & IFF_UP) {
1327 imr->ifm_status |= IFM_ACTIVE;
1328 break;
1329 }
1330 imr->ifm_active = media_status(ic->ic_opmode, ic->ic_curchan);
1331 if (imr->ifm_status & IFM_ACTIVE)
1332 imr->ifm_current = imr->ifm_active;
1333 }
1334
1335 void
1336 ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr)
1337 {
1338 struct ieee80211vap *vap = ifp->if_softc;
1339 struct ieee80211com *ic = vap->iv_ic;
1340 enum ieee80211_phymode mode;
1341
1342 imr->ifm_status = IFM_AVALID;
1343 /*
1344 * NB: use the current channel's mode to lock down a xmit
1345 * rate only when running; otherwise we may have a mismatch
1346 * in which case the rate will not be convertible.
1347 */
1348 if (vap->iv_state == IEEE80211_S_RUN) {
1349 imr->ifm_status |= IFM_ACTIVE;
1350 mode = ieee80211_chan2mode(ic->ic_curchan);
1351 } else
1352 mode = IEEE80211_MODE_AUTO;
1353 imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan);
1354 /*
1355 * Calculate a current rate if possible.
1356 */
1357 if (vap->iv_txparms[mode].ucastrate != IEEE80211_FIXED_RATE_NONE) {
1358 /*
1359 * A fixed rate is set, report that.
1360 */
1361 imr->ifm_active |= ieee80211_rate2media(ic,
1362 vap->iv_txparms[mode].ucastrate, mode);
1363 } else if (vap->iv_opmode == IEEE80211_M_STA) {
1364 /*
1365 * In station mode report the current transmit rate.
1366 */
1367 imr->ifm_active |= ieee80211_rate2media(ic,
1368 vap->iv_bss->ni_txrate, mode);
1369 } else
1370 imr->ifm_active |= IFM_AUTO;
1371 if (imr->ifm_status & IFM_ACTIVE)
1372 imr->ifm_current = imr->ifm_active;
1373 }
1374
1375 /*
1376 * Set the current phy mode and recalculate the active channel
1377 * set based on the available channels for this mode. Also
1378 * select a new default/current channel if the current one is
1379 * inappropriate for this mode.
1380 */
1381 int
1382 ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode)
1383 {
1384 /*
1385 * Adjust basic rates in 11b/11g supported rate set.
1386 * Note that if operating on a hal/quarter rate channel
1387 * this is a noop as those rates sets are different
1388 * and used instead.
1389 */
1390 if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B)
1391 ieee80211_setbasicrates(&ic->ic_sup_rates[mode], mode);
1392
1393 ic->ic_curmode = mode;
1394 ieee80211_reset_erp(ic); /* reset ERP state */
1395
1396 return 0;
1397 }
1398
1399 /*
1400 * Return the phy mode for with the specified channel.
1401 */
1402 enum ieee80211_phymode
1403 ieee80211_chan2mode(const struct ieee80211_channel *chan)
1404 {
1405
1406 if (IEEE80211_IS_CHAN_HTA(chan))
1407 return IEEE80211_MODE_11NA;
1408 else if (IEEE80211_IS_CHAN_HTG(chan))
1409 return IEEE80211_MODE_11NG;
1410 else if (IEEE80211_IS_CHAN_108G(chan))
1411 return IEEE80211_MODE_TURBO_G;
1412 else if (IEEE80211_IS_CHAN_ST(chan))
1413 return IEEE80211_MODE_STURBO_A;
1414 else if (IEEE80211_IS_CHAN_TURBO(chan))
1415 return IEEE80211_MODE_TURBO_A;
1416 else if (IEEE80211_IS_CHAN_HALF(chan))
1417 return IEEE80211_MODE_HALF;
1418 else if (IEEE80211_IS_CHAN_QUARTER(chan))
1419 return IEEE80211_MODE_QUARTER;
1420 else if (IEEE80211_IS_CHAN_A(chan))
1421 return IEEE80211_MODE_11A;
1422 else if (IEEE80211_IS_CHAN_ANYG(chan))
1423 return IEEE80211_MODE_11G;
1424 else if (IEEE80211_IS_CHAN_B(chan))
1425 return IEEE80211_MODE_11B;
1426 else if (IEEE80211_IS_CHAN_FHSS(chan))
1427 return IEEE80211_MODE_FH;
1428
1429 /* NB: should not get here */
1430 printf("%s: cannot map channel to mode; freq %u flags 0x%x\n",
1431 __func__, chan->ic_freq, chan->ic_flags);
1432 return IEEE80211_MODE_11B;
1433 }
1434
1435 struct ratemedia {
1436 u_int match; /* rate + mode */
1437 u_int media; /* if_media rate */
1438 };
1439
1440 static int
1441 findmedia(const struct ratemedia rates[], int n, u_int match)
1442 {
1443 int i;
1444
1445 for (i = 0; i < n; i++)
1446 if (rates[i].match == match)
1447 return rates[i].media;
1448 return IFM_AUTO;
1449 }
1450
1451 /*
1452 * Convert IEEE80211 rate value to ifmedia subtype.
1453 * Rate is either a legacy rate in units of 0.5Mbps
1454 * or an MCS index.
1455 */
1456 int
1457 ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode)
1458 {
1459 #define N(a) (sizeof(a) / sizeof(a[0]))
1460 static const struct ratemedia rates[] = {
1461 { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 },
1462 { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 },
1463 { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 },
1464 { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 },
1465 { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 },
1466 { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 },
1467 { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 },
1468 { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 },
1469 { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 },
1470 { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 },
1471 { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 },
1472 { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 },
1473 { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 },
1474 { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 },
1475 { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 },
1476 { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 },
1477 { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 },
1478 { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 },
1479 { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 },
1480 { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 },
1481 { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 },
1482 { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 },
1483 { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 },
1484 { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 },
1485 { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 },
1486 { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 },
1487 { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 },
1488 { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 },
1489 { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 },
1490 { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 },
1491 /* NB: OFDM72 doesn't realy exist so we don't handle it */
1492 };
1493 static const struct ratemedia htrates[] = {
1494 { 0, IFM_IEEE80211_MCS },
1495 { 1, IFM_IEEE80211_MCS },
1496 { 2, IFM_IEEE80211_MCS },
1497 { 3, IFM_IEEE80211_MCS },
1498 { 4, IFM_IEEE80211_MCS },
1499 { 5, IFM_IEEE80211_MCS },
1500 { 6, IFM_IEEE80211_MCS },
1501 { 7, IFM_IEEE80211_MCS },
1502 { 8, IFM_IEEE80211_MCS },
1503 { 9, IFM_IEEE80211_MCS },
1504 { 10, IFM_IEEE80211_MCS },
1505 { 11, IFM_IEEE80211_MCS },
1506 { 12, IFM_IEEE80211_MCS },
1507 { 13, IFM_IEEE80211_MCS },
1508 { 14, IFM_IEEE80211_MCS },
1509 { 15, IFM_IEEE80211_MCS },
1510 };
1511 int m;
1512
1513 /*
1514 * Check 11n rates first for match as an MCS.
1515 */
1516 if (mode == IEEE80211_MODE_11NA) {
1517 if (rate & IEEE80211_RATE_MCS) {
1518 rate &= ~IEEE80211_RATE_MCS;
1519 m = findmedia(htrates, N(htrates), rate);
1520 if (m != IFM_AUTO)
1521 return m | IFM_IEEE80211_11NA;
1522 }
1523 } else if (mode == IEEE80211_MODE_11NG) {
1524 /* NB: 12 is ambiguous, it will be treated as an MCS */
1525 if (rate & IEEE80211_RATE_MCS) {
1526 rate &= ~IEEE80211_RATE_MCS;
1527 m = findmedia(htrates, N(htrates), rate);
1528 if (m != IFM_AUTO)
1529 return m | IFM_IEEE80211_11NG;
1530 }
1531 }
1532 rate &= IEEE80211_RATE_VAL;
1533 switch (mode) {
1534 case IEEE80211_MODE_11A:
1535 case IEEE80211_MODE_HALF: /* XXX good 'nuf */
1536 case IEEE80211_MODE_QUARTER:
1537 case IEEE80211_MODE_11NA:
1538 case IEEE80211_MODE_TURBO_A:
1539 case IEEE80211_MODE_STURBO_A:
1540 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11A);
1541 case IEEE80211_MODE_11B:
1542 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11B);
1543 case IEEE80211_MODE_FH:
1544 return findmedia(rates, N(rates), rate | IFM_IEEE80211_FH);
1545 case IEEE80211_MODE_AUTO:
1546 /* NB: ic may be NULL for some drivers */
1547 if (ic != NULL && ic->ic_phytype == IEEE80211_T_FH)
1548 return findmedia(rates, N(rates),
1549 rate | IFM_IEEE80211_FH);
1550 /* NB: hack, 11g matches both 11b+11a rates */
1551 /* fall thru... */
1552 case IEEE80211_MODE_11G:
1553 case IEEE80211_MODE_11NG:
1554 case IEEE80211_MODE_TURBO_G:
1555 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11G);
1556 }
1557 return IFM_AUTO;
1558 #undef N
1559 }
1560
1561 int
1562 ieee80211_media2rate(int mword)
1563 {
1564 #define N(a) (sizeof(a) / sizeof(a[0]))
1565 static const int ieeerates[] = {
1566 -1, /* IFM_AUTO */
1567 0, /* IFM_MANUAL */
1568 0, /* IFM_NONE */
1569 2, /* IFM_IEEE80211_FH1 */
1570 4, /* IFM_IEEE80211_FH2 */
1571 2, /* IFM_IEEE80211_DS1 */
1572 4, /* IFM_IEEE80211_DS2 */
1573 11, /* IFM_IEEE80211_DS5 */
1574 22, /* IFM_IEEE80211_DS11 */
1575 44, /* IFM_IEEE80211_DS22 */
1576 12, /* IFM_IEEE80211_OFDM6 */
1577 18, /* IFM_IEEE80211_OFDM9 */
1578 24, /* IFM_IEEE80211_OFDM12 */
1579 36, /* IFM_IEEE80211_OFDM18 */
1580 48, /* IFM_IEEE80211_OFDM24 */
1581 72, /* IFM_IEEE80211_OFDM36 */
1582 96, /* IFM_IEEE80211_OFDM48 */
1583 108, /* IFM_IEEE80211_OFDM54 */
1584 144, /* IFM_IEEE80211_OFDM72 */
1585 0, /* IFM_IEEE80211_DS354k */
1586 0, /* IFM_IEEE80211_DS512k */
1587 6, /* IFM_IEEE80211_OFDM3 */
1588 9, /* IFM_IEEE80211_OFDM4 */
1589 54, /* IFM_IEEE80211_OFDM27 */
1590 -1, /* IFM_IEEE80211_MCS */
1591 };
1592 return IFM_SUBTYPE(mword) < N(ieeerates) ?
1593 ieeerates[IFM_SUBTYPE(mword)] : 0;
1594 #undef N
1595 }
1596
1597 /*
1598 * The following hash function is adapted from "Hash Functions" by Bob Jenkins
1599 * ("Algorithm Alley", Dr. Dobbs Journal, September 1997).
1600 */
1601 #define mix(a, b, c) \
1602 do { \
1603 a -= b; a -= c; a ^= (c >> 13); \
1604 b -= c; b -= a; b ^= (a << 8); \
1605 c -= a; c -= b; c ^= (b >> 13); \
1606 a -= b; a -= c; a ^= (c >> 12); \
1607 b -= c; b -= a; b ^= (a << 16); \
1608 c -= a; c -= b; c ^= (b >> 5); \
1609 a -= b; a -= c; a ^= (c >> 3); \
1610 b -= c; b -= a; b ^= (a << 10); \
1611 c -= a; c -= b; c ^= (b >> 15); \
1612 } while (/*CONSTCOND*/0)
1613
1614 uint32_t
1615 ieee80211_mac_hash(const struct ieee80211com *ic,
1616 const uint8_t addr[IEEE80211_ADDR_LEN])
1617 {
1618 uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = ic->ic_hash_key;
1619
1620 b += addr[5] << 8;
1621 b += addr[4];
1622 a += addr[3] << 24;
1623 a += addr[2] << 16;
1624 a += addr[1] << 8;
1625 a += addr[0];
1626
1627 mix(a, b, c);
1628
1629 return c;
1630 }
1631 #undef mix
Cache object: 9e126a694228c9c712c69c572f0a7c51
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