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: releng/8.0/sys/net80211/ieee80211.c 196161 2009-08-12 21:34:57Z sam $");
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_watchdog = NULL; /* NB: no watchdog routine */
395 ifp->if_init = ieee80211_init;
396 /* NB: input+output filled in by ether_ifattach */
397 IFQ_SET_MAXLEN(&ifp->if_snd, IFQ_MAXLEN);
398 ifp->if_snd.ifq_drv_maxlen = IFQ_MAXLEN;
399 IFQ_SET_READY(&ifp->if_snd);
400
401 vap->iv_ifp = ifp;
402 vap->iv_ic = ic;
403 vap->iv_flags = ic->ic_flags; /* propagate common flags */
404 vap->iv_flags_ext = ic->ic_flags_ext;
405 vap->iv_flags_ven = ic->ic_flags_ven;
406 vap->iv_caps = ic->ic_caps &~ IEEE80211_C_OPMODE;
407 vap->iv_htcaps = ic->ic_htcaps;
408 vap->iv_opmode = opmode;
409 vap->iv_caps |= ieee80211_opcap[opmode];
410 switch (opmode) {
411 case IEEE80211_M_WDS:
412 /*
413 * WDS links must specify the bssid of the far end.
414 * For legacy operation this is a static relationship.
415 * For non-legacy operation the station must associate
416 * and be authorized to pass traffic. Plumbing the
417 * vap to the proper node happens when the vap
418 * transitions to RUN state.
419 */
420 IEEE80211_ADDR_COPY(vap->iv_des_bssid, bssid);
421 vap->iv_flags |= IEEE80211_F_DESBSSID;
422 if (flags & IEEE80211_CLONE_WDSLEGACY)
423 vap->iv_flags_ext |= IEEE80211_FEXT_WDSLEGACY;
424 break;
425 #ifdef IEEE80211_SUPPORT_TDMA
426 case IEEE80211_M_AHDEMO:
427 if (flags & IEEE80211_CLONE_TDMA) {
428 /* NB: checked before clone operation allowed */
429 KASSERT(ic->ic_caps & IEEE80211_C_TDMA,
430 ("not TDMA capable, ic_caps 0x%x", ic->ic_caps));
431 /*
432 * Propagate TDMA capability to mark vap; this
433 * cannot be removed and is used to distinguish
434 * regular ahdemo operation from ahdemo+tdma.
435 */
436 vap->iv_caps |= IEEE80211_C_TDMA;
437 }
438 break;
439 #endif
440 }
441 /* auto-enable s/w beacon miss support */
442 if (flags & IEEE80211_CLONE_NOBEACONS)
443 vap->iv_flags_ext |= IEEE80211_FEXT_SWBMISS;
444 /*
445 * Enable various functionality by default if we're
446 * capable; the driver can override us if it knows better.
447 */
448 if (vap->iv_caps & IEEE80211_C_WME)
449 vap->iv_flags |= IEEE80211_F_WME;
450 if (vap->iv_caps & IEEE80211_C_BURST)
451 vap->iv_flags |= IEEE80211_F_BURST;
452 /* NB: bg scanning only makes sense for station mode right now */
453 if (vap->iv_opmode == IEEE80211_M_STA &&
454 (vap->iv_caps & IEEE80211_C_BGSCAN))
455 vap->iv_flags |= IEEE80211_F_BGSCAN;
456 vap->iv_flags |= IEEE80211_F_DOTH; /* XXX no cap, just ena */
457 /* NB: DFS support only makes sense for ap mode right now */
458 if (vap->iv_opmode == IEEE80211_M_HOSTAP &&
459 (vap->iv_caps & IEEE80211_C_DFS))
460 vap->iv_flags_ext |= IEEE80211_FEXT_DFS;
461
462 vap->iv_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */
463 vap->iv_bmissthreshold = IEEE80211_HWBMISS_DEFAULT;
464 vap->iv_dtim_period = IEEE80211_DTIM_DEFAULT;
465 /*
466 * Install a default reset method for the ioctl support;
467 * the driver can override this.
468 */
469 vap->iv_reset = default_reset;
470
471 IEEE80211_ADDR_COPY(vap->iv_myaddr, macaddr);
472
473 ieee80211_sysctl_vattach(vap);
474 ieee80211_crypto_vattach(vap);
475 ieee80211_node_vattach(vap);
476 ieee80211_power_vattach(vap);
477 ieee80211_proto_vattach(vap);
478 #ifdef IEEE80211_SUPPORT_SUPERG
479 ieee80211_superg_vattach(vap);
480 #endif
481 ieee80211_ht_vattach(vap);
482 ieee80211_scan_vattach(vap);
483 ieee80211_regdomain_vattach(vap);
484 ieee80211_radiotap_vattach(vap);
485
486 return 0;
487 }
488
489 /*
490 * Activate a vap. State should have been prepared with a
491 * call to ieee80211_vap_setup and by the driver. On return
492 * from this call the vap is ready for use.
493 */
494 int
495 ieee80211_vap_attach(struct ieee80211vap *vap,
496 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat)
497 {
498 struct ifnet *ifp = vap->iv_ifp;
499 struct ieee80211com *ic = vap->iv_ic;
500 struct ifmediareq imr;
501 int maxrate;
502
503 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
504 "%s: %s parent %s flags 0x%x flags_ext 0x%x\n",
505 __func__, ieee80211_opmode_name[vap->iv_opmode],
506 ic->ic_ifp->if_xname, vap->iv_flags, vap->iv_flags_ext);
507
508 /*
509 * Do late attach work that cannot happen until after
510 * the driver has had a chance to override defaults.
511 */
512 ieee80211_node_latevattach(vap);
513 ieee80211_power_latevattach(vap);
514
515 maxrate = ieee80211_media_setup(ic, &vap->iv_media, vap->iv_caps,
516 vap->iv_opmode == IEEE80211_M_STA, media_change, media_stat);
517 ieee80211_media_status(ifp, &imr);
518 /* NB: strip explicit mode; we're actually in autoselect */
519 ifmedia_set(&vap->iv_media,
520 imr.ifm_active &~ (IFM_MMASK | IFM_IEEE80211_TURBO));
521 if (maxrate)
522 ifp->if_baudrate = IF_Mbps(maxrate);
523
524 ether_ifattach(ifp, vap->iv_myaddr);
525 if (vap->iv_opmode == IEEE80211_M_MONITOR) {
526 /* NB: disallow transmit */
527 ifp->if_transmit = null_transmit;
528 ifp->if_output = null_output;
529 } else {
530 /* hook output method setup by ether_ifattach */
531 vap->iv_output = ifp->if_output;
532 ifp->if_output = ieee80211_output;
533 }
534 /* NB: if_mtu set by ether_ifattach to ETHERMTU */
535
536 IEEE80211_LOCK(ic);
537 TAILQ_INSERT_TAIL(&ic->ic_vaps, vap, iv_next);
538 ieee80211_syncflag_locked(ic, IEEE80211_F_WME);
539 #ifdef IEEE80211_SUPPORT_SUPERG
540 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP);
541 #endif
542 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF);
543 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST);
544 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT);
545 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40);
546 ieee80211_syncifflag_locked(ic, IFF_PROMISC);
547 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI);
548 IEEE80211_UNLOCK(ic);
549
550 return 1;
551 }
552
553 /*
554 * Tear down vap state and reclaim the ifnet.
555 * The driver is assumed to have prepared for
556 * this; e.g. by turning off interrupts for the
557 * underlying device.
558 */
559 void
560 ieee80211_vap_detach(struct ieee80211vap *vap)
561 {
562 struct ieee80211com *ic = vap->iv_ic;
563 struct ifnet *ifp = vap->iv_ifp;
564
565 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s parent %s\n",
566 __func__, ieee80211_opmode_name[vap->iv_opmode],
567 ic->ic_ifp->if_xname);
568
569 /* NB: bpfdetach is called by ether_ifdetach and claims all taps */
570 ether_ifdetach(ifp);
571
572 ieee80211_stop(vap);
573
574 /*
575 * Flush any deferred vap tasks.
576 */
577 ieee80211_draintask(ic, &vap->iv_nstate_task);
578 ieee80211_draintask(ic, &vap->iv_swbmiss_task);
579
580 /* XXX band-aid until ifnet handles this for us */
581 taskqueue_drain(taskqueue_swi, &ifp->if_linktask);
582
583 IEEE80211_LOCK(ic);
584 KASSERT(vap->iv_state == IEEE80211_S_INIT , ("vap still running"));
585 TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next);
586 ieee80211_syncflag_locked(ic, IEEE80211_F_WME);
587 #ifdef IEEE80211_SUPPORT_SUPERG
588 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP);
589 #endif
590 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF);
591 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST);
592 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT);
593 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40);
594 /* NB: this handles the bpfdetach done below */
595 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_BPF);
596 ieee80211_syncifflag_locked(ic, IFF_PROMISC);
597 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI);
598 IEEE80211_UNLOCK(ic);
599
600 ifmedia_removeall(&vap->iv_media);
601
602 ieee80211_radiotap_vdetach(vap);
603 ieee80211_regdomain_vdetach(vap);
604 ieee80211_scan_vdetach(vap);
605 #ifdef IEEE80211_SUPPORT_SUPERG
606 ieee80211_superg_vdetach(vap);
607 #endif
608 ieee80211_ht_vdetach(vap);
609 /* NB: must be before ieee80211_node_vdetach */
610 ieee80211_proto_vdetach(vap);
611 ieee80211_crypto_vdetach(vap);
612 ieee80211_power_vdetach(vap);
613 ieee80211_node_vdetach(vap);
614 ieee80211_sysctl_vdetach(vap);
615
616 if_free(ifp);
617 }
618
619 /*
620 * Synchronize flag bit state in the parent ifnet structure
621 * according to the state of all vap ifnet's. This is used,
622 * for example, to handle IFF_PROMISC and IFF_ALLMULTI.
623 */
624 void
625 ieee80211_syncifflag_locked(struct ieee80211com *ic, int flag)
626 {
627 struct ifnet *ifp = ic->ic_ifp;
628 struct ieee80211vap *vap;
629 int bit, oflags;
630
631 IEEE80211_LOCK_ASSERT(ic);
632
633 bit = 0;
634 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
635 if (vap->iv_ifp->if_flags & flag) {
636 /*
637 * XXX the bridge sets PROMISC but we don't want to
638 * enable it on the device, discard here so all the
639 * drivers don't need to special-case it
640 */
641 if (flag == IFF_PROMISC &&
642 !(vap->iv_opmode == IEEE80211_M_MONITOR ||
643 (vap->iv_opmode == IEEE80211_M_AHDEMO &&
644 (vap->iv_caps & IEEE80211_C_TDMA) == 0)))
645 continue;
646 bit = 1;
647 break;
648 }
649 oflags = ifp->if_flags;
650 if (bit)
651 ifp->if_flags |= flag;
652 else
653 ifp->if_flags &= ~flag;
654 if ((ifp->if_flags ^ oflags) & flag) {
655 /* XXX should we return 1/0 and let caller do this? */
656 if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
657 if (flag == IFF_PROMISC)
658 ieee80211_runtask(ic, &ic->ic_promisc_task);
659 else if (flag == IFF_ALLMULTI)
660 ieee80211_runtask(ic, &ic->ic_mcast_task);
661 }
662 }
663 }
664
665 /*
666 * Synchronize flag bit state in the com structure
667 * according to the state of all vap's. This is used,
668 * for example, to handle state changes via ioctls.
669 */
670 static void
671 ieee80211_syncflag_locked(struct ieee80211com *ic, int flag)
672 {
673 struct ieee80211vap *vap;
674 int bit;
675
676 IEEE80211_LOCK_ASSERT(ic);
677
678 bit = 0;
679 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
680 if (vap->iv_flags & flag) {
681 bit = 1;
682 break;
683 }
684 if (bit)
685 ic->ic_flags |= flag;
686 else
687 ic->ic_flags &= ~flag;
688 }
689
690 void
691 ieee80211_syncflag(struct ieee80211vap *vap, int flag)
692 {
693 struct ieee80211com *ic = vap->iv_ic;
694
695 IEEE80211_LOCK(ic);
696 if (flag < 0) {
697 flag = -flag;
698 vap->iv_flags &= ~flag;
699 } else
700 vap->iv_flags |= flag;
701 ieee80211_syncflag_locked(ic, flag);
702 IEEE80211_UNLOCK(ic);
703 }
704
705 /*
706 * Synchronize flags_ht bit state in the com structure
707 * according to the state of all vap's. This is used,
708 * for example, to handle state changes via ioctls.
709 */
710 static void
711 ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag)
712 {
713 struct ieee80211vap *vap;
714 int bit;
715
716 IEEE80211_LOCK_ASSERT(ic);
717
718 bit = 0;
719 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
720 if (vap->iv_flags_ht & flag) {
721 bit = 1;
722 break;
723 }
724 if (bit)
725 ic->ic_flags_ht |= flag;
726 else
727 ic->ic_flags_ht &= ~flag;
728 }
729
730 void
731 ieee80211_syncflag_ht(struct ieee80211vap *vap, int flag)
732 {
733 struct ieee80211com *ic = vap->iv_ic;
734
735 IEEE80211_LOCK(ic);
736 if (flag < 0) {
737 flag = -flag;
738 vap->iv_flags_ht &= ~flag;
739 } else
740 vap->iv_flags_ht |= flag;
741 ieee80211_syncflag_ht_locked(ic, flag);
742 IEEE80211_UNLOCK(ic);
743 }
744
745 /*
746 * Synchronize flags_ext bit state in the com structure
747 * according to the state of all vap's. This is used,
748 * for example, to handle state changes via ioctls.
749 */
750 static void
751 ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag)
752 {
753 struct ieee80211vap *vap;
754 int bit;
755
756 IEEE80211_LOCK_ASSERT(ic);
757
758 bit = 0;
759 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
760 if (vap->iv_flags_ext & flag) {
761 bit = 1;
762 break;
763 }
764 if (bit)
765 ic->ic_flags_ext |= flag;
766 else
767 ic->ic_flags_ext &= ~flag;
768 }
769
770 void
771 ieee80211_syncflag_ext(struct ieee80211vap *vap, int flag)
772 {
773 struct ieee80211com *ic = vap->iv_ic;
774
775 IEEE80211_LOCK(ic);
776 if (flag < 0) {
777 flag = -flag;
778 vap->iv_flags_ext &= ~flag;
779 } else
780 vap->iv_flags_ext |= flag;
781 ieee80211_syncflag_ext_locked(ic, flag);
782 IEEE80211_UNLOCK(ic);
783 }
784
785 static __inline int
786 mapgsm(u_int freq, u_int flags)
787 {
788 freq *= 10;
789 if (flags & IEEE80211_CHAN_QUARTER)
790 freq += 5;
791 else if (flags & IEEE80211_CHAN_HALF)
792 freq += 10;
793 else
794 freq += 20;
795 /* NB: there is no 907/20 wide but leave room */
796 return (freq - 906*10) / 5;
797 }
798
799 static __inline int
800 mappsb(u_int freq, u_int flags)
801 {
802 return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5;
803 }
804
805 /*
806 * Convert MHz frequency to IEEE channel number.
807 */
808 int
809 ieee80211_mhz2ieee(u_int freq, u_int flags)
810 {
811 #define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990)
812 if (flags & IEEE80211_CHAN_GSM)
813 return mapgsm(freq, flags);
814 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
815 if (freq == 2484)
816 return 14;
817 if (freq < 2484)
818 return ((int) freq - 2407) / 5;
819 else
820 return 15 + ((freq - 2512) / 20);
821 } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */
822 if (freq <= 5000) {
823 /* XXX check regdomain? */
824 if (IS_FREQ_IN_PSB(freq))
825 return mappsb(freq, flags);
826 return (freq - 4000) / 5;
827 } else
828 return (freq - 5000) / 5;
829 } else { /* either, guess */
830 if (freq == 2484)
831 return 14;
832 if (freq < 2484) {
833 if (907 <= freq && freq <= 922)
834 return mapgsm(freq, flags);
835 return ((int) freq - 2407) / 5;
836 }
837 if (freq < 5000) {
838 if (IS_FREQ_IN_PSB(freq))
839 return mappsb(freq, flags);
840 else if (freq > 4900)
841 return (freq - 4000) / 5;
842 else
843 return 15 + ((freq - 2512) / 20);
844 }
845 return (freq - 5000) / 5;
846 }
847 #undef IS_FREQ_IN_PSB
848 }
849
850 /*
851 * Convert channel to IEEE channel number.
852 */
853 int
854 ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c)
855 {
856 if (c == NULL) {
857 if_printf(ic->ic_ifp, "invalid channel (NULL)\n");
858 return 0; /* XXX */
859 }
860 return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee);
861 }
862
863 /*
864 * Convert IEEE channel number to MHz frequency.
865 */
866 u_int
867 ieee80211_ieee2mhz(u_int chan, u_int flags)
868 {
869 if (flags & IEEE80211_CHAN_GSM)
870 return 907 + 5 * (chan / 10);
871 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
872 if (chan == 14)
873 return 2484;
874 if (chan < 14)
875 return 2407 + chan*5;
876 else
877 return 2512 + ((chan-15)*20);
878 } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */
879 if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) {
880 chan -= 37;
881 return 4940 + chan*5 + (chan % 5 ? 2 : 0);
882 }
883 return 5000 + (chan*5);
884 } else { /* either, guess */
885 /* XXX can't distinguish PSB+GSM channels */
886 if (chan == 14)
887 return 2484;
888 if (chan < 14) /* 0-13 */
889 return 2407 + chan*5;
890 if (chan < 27) /* 15-26 */
891 return 2512 + ((chan-15)*20);
892 return 5000 + (chan*5);
893 }
894 }
895
896 /*
897 * Locate a channel given a frequency+flags. We cache
898 * the previous lookup to optimize switching between two
899 * channels--as happens with dynamic turbo.
900 */
901 struct ieee80211_channel *
902 ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags)
903 {
904 struct ieee80211_channel *c;
905 int i;
906
907 flags &= IEEE80211_CHAN_ALLTURBO;
908 c = ic->ic_prevchan;
909 if (c != NULL && c->ic_freq == freq &&
910 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
911 return c;
912 /* brute force search */
913 for (i = 0; i < ic->ic_nchans; i++) {
914 c = &ic->ic_channels[i];
915 if (c->ic_freq == freq &&
916 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
917 return c;
918 }
919 return NULL;
920 }
921
922 /*
923 * Locate a channel given a channel number+flags. We cache
924 * the previous lookup to optimize switching between two
925 * channels--as happens with dynamic turbo.
926 */
927 struct ieee80211_channel *
928 ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags)
929 {
930 struct ieee80211_channel *c;
931 int i;
932
933 flags &= IEEE80211_CHAN_ALLTURBO;
934 c = ic->ic_prevchan;
935 if (c != NULL && c->ic_ieee == ieee &&
936 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
937 return c;
938 /* brute force search */
939 for (i = 0; i < ic->ic_nchans; i++) {
940 c = &ic->ic_channels[i];
941 if (c->ic_ieee == ieee &&
942 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
943 return c;
944 }
945 return NULL;
946 }
947
948 static void
949 addmedia(struct ifmedia *media, int caps, int addsta, int mode, int mword)
950 {
951 #define ADD(_ic, _s, _o) \
952 ifmedia_add(media, \
953 IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL)
954 static const u_int mopts[IEEE80211_MODE_MAX] = {
955 [IEEE80211_MODE_AUTO] = IFM_AUTO,
956 [IEEE80211_MODE_11A] = IFM_IEEE80211_11A,
957 [IEEE80211_MODE_11B] = IFM_IEEE80211_11B,
958 [IEEE80211_MODE_11G] = IFM_IEEE80211_11G,
959 [IEEE80211_MODE_FH] = IFM_IEEE80211_FH,
960 [IEEE80211_MODE_TURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO,
961 [IEEE80211_MODE_TURBO_G] = IFM_IEEE80211_11G|IFM_IEEE80211_TURBO,
962 [IEEE80211_MODE_STURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO,
963 [IEEE80211_MODE_HALF] = IFM_IEEE80211_11A, /* XXX */
964 [IEEE80211_MODE_QUARTER] = IFM_IEEE80211_11A, /* XXX */
965 [IEEE80211_MODE_11NA] = IFM_IEEE80211_11NA,
966 [IEEE80211_MODE_11NG] = IFM_IEEE80211_11NG,
967 };
968 u_int mopt;
969
970 mopt = mopts[mode];
971 if (addsta)
972 ADD(ic, mword, mopt); /* STA mode has no cap */
973 if (caps & IEEE80211_C_IBSS)
974 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC);
975 if (caps & IEEE80211_C_HOSTAP)
976 ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP);
977 if (caps & IEEE80211_C_AHDEMO)
978 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0);
979 if (caps & IEEE80211_C_MONITOR)
980 ADD(media, mword, mopt | IFM_IEEE80211_MONITOR);
981 if (caps & IEEE80211_C_WDS)
982 ADD(media, mword, mopt | IFM_IEEE80211_WDS);
983 if (caps & IEEE80211_C_MBSS)
984 ADD(media, mword, mopt | IFM_IEEE80211_MBSS);
985 #undef ADD
986 }
987
988 /*
989 * Setup the media data structures according to the channel and
990 * rate tables.
991 */
992 static int
993 ieee80211_media_setup(struct ieee80211com *ic,
994 struct ifmedia *media, int caps, int addsta,
995 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat)
996 {
997 int i, j, mode, rate, maxrate, mword, r;
998 const struct ieee80211_rateset *rs;
999 struct ieee80211_rateset allrates;
1000
1001 /*
1002 * Fill in media characteristics.
1003 */
1004 ifmedia_init(media, 0, media_change, media_stat);
1005 maxrate = 0;
1006 /*
1007 * Add media for legacy operating modes.
1008 */
1009 memset(&allrates, 0, sizeof(allrates));
1010 for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) {
1011 if (isclr(ic->ic_modecaps, mode))
1012 continue;
1013 addmedia(media, caps, addsta, mode, IFM_AUTO);
1014 if (mode == IEEE80211_MODE_AUTO)
1015 continue;
1016 rs = &ic->ic_sup_rates[mode];
1017 for (i = 0; i < rs->rs_nrates; i++) {
1018 rate = rs->rs_rates[i];
1019 mword = ieee80211_rate2media(ic, rate, mode);
1020 if (mword == 0)
1021 continue;
1022 addmedia(media, caps, addsta, mode, mword);
1023 /*
1024 * Add legacy rate to the collection of all rates.
1025 */
1026 r = rate & IEEE80211_RATE_VAL;
1027 for (j = 0; j < allrates.rs_nrates; j++)
1028 if (allrates.rs_rates[j] == r)
1029 break;
1030 if (j == allrates.rs_nrates) {
1031 /* unique, add to the set */
1032 allrates.rs_rates[j] = r;
1033 allrates.rs_nrates++;
1034 }
1035 rate = (rate & IEEE80211_RATE_VAL) / 2;
1036 if (rate > maxrate)
1037 maxrate = rate;
1038 }
1039 }
1040 for (i = 0; i < allrates.rs_nrates; i++) {
1041 mword = ieee80211_rate2media(ic, allrates.rs_rates[i],
1042 IEEE80211_MODE_AUTO);
1043 if (mword == 0)
1044 continue;
1045 /* NB: remove media options from mword */
1046 addmedia(media, caps, addsta,
1047 IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword));
1048 }
1049 /*
1050 * Add HT/11n media. Note that we do not have enough
1051 * bits in the media subtype to express the MCS so we
1052 * use a "placeholder" media subtype and any fixed MCS
1053 * must be specified with a different mechanism.
1054 */
1055 for (; mode <= IEEE80211_MODE_11NG; mode++) {
1056 if (isclr(ic->ic_modecaps, mode))
1057 continue;
1058 addmedia(media, caps, addsta, mode, IFM_AUTO);
1059 addmedia(media, caps, addsta, mode, IFM_IEEE80211_MCS);
1060 }
1061 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) ||
1062 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) {
1063 addmedia(media, caps, addsta,
1064 IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS);
1065 /* XXX could walk htrates */
1066 /* XXX known array size */
1067 if (ieee80211_htrates[15].ht40_rate_400ns > maxrate)
1068 maxrate = ieee80211_htrates[15].ht40_rate_400ns;
1069 }
1070 return maxrate;
1071 }
1072
1073 void
1074 ieee80211_media_init(struct ieee80211com *ic)
1075 {
1076 struct ifnet *ifp = ic->ic_ifp;
1077 int maxrate;
1078
1079 /* NB: this works because the structure is initialized to zero */
1080 if (!LIST_EMPTY(&ic->ic_media.ifm_list)) {
1081 /*
1082 * We are re-initializing the channel list; clear
1083 * the existing media state as the media routines
1084 * don't suppress duplicates.
1085 */
1086 ifmedia_removeall(&ic->ic_media);
1087 }
1088 ieee80211_chan_init(ic);
1089
1090 /*
1091 * Recalculate media settings in case new channel list changes
1092 * the set of available modes.
1093 */
1094 maxrate = ieee80211_media_setup(ic, &ic->ic_media, ic->ic_caps, 1,
1095 ieee80211com_media_change, ieee80211com_media_status);
1096 /* NB: strip explicit mode; we're actually in autoselect */
1097 ifmedia_set(&ic->ic_media,
1098 media_status(ic->ic_opmode, ic->ic_curchan) &~
1099 (IFM_MMASK | IFM_IEEE80211_TURBO));
1100 if (maxrate)
1101 ifp->if_baudrate = IF_Mbps(maxrate);
1102
1103 /* XXX need to propagate new media settings to vap's */
1104 }
1105
1106 /* XXX inline or eliminate? */
1107 const struct ieee80211_rateset *
1108 ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c)
1109 {
1110 /* XXX does this work for 11ng basic rates? */
1111 return &ic->ic_sup_rates[ieee80211_chan2mode(c)];
1112 }
1113
1114 void
1115 ieee80211_announce(struct ieee80211com *ic)
1116 {
1117 struct ifnet *ifp = ic->ic_ifp;
1118 int i, mode, rate, mword;
1119 const struct ieee80211_rateset *rs;
1120
1121 /* NB: skip AUTO since it has no rates */
1122 for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) {
1123 if (isclr(ic->ic_modecaps, mode))
1124 continue;
1125 if_printf(ifp, "%s rates: ", ieee80211_phymode_name[mode]);
1126 rs = &ic->ic_sup_rates[mode];
1127 for (i = 0; i < rs->rs_nrates; i++) {
1128 mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode);
1129 if (mword == 0)
1130 continue;
1131 rate = ieee80211_media2rate(mword);
1132 printf("%s%d%sMbps", (i != 0 ? " " : ""),
1133 rate / 2, ((rate & 0x1) != 0 ? ".5" : ""));
1134 }
1135 printf("\n");
1136 }
1137 ieee80211_ht_announce(ic);
1138 }
1139
1140 void
1141 ieee80211_announce_channels(struct ieee80211com *ic)
1142 {
1143 const struct ieee80211_channel *c;
1144 char type;
1145 int i, cw;
1146
1147 printf("Chan Freq CW RegPwr MinPwr MaxPwr\n");
1148 for (i = 0; i < ic->ic_nchans; i++) {
1149 c = &ic->ic_channels[i];
1150 if (IEEE80211_IS_CHAN_ST(c))
1151 type = 'S';
1152 else if (IEEE80211_IS_CHAN_108A(c))
1153 type = 'T';
1154 else if (IEEE80211_IS_CHAN_108G(c))
1155 type = 'G';
1156 else if (IEEE80211_IS_CHAN_HT(c))
1157 type = 'n';
1158 else if (IEEE80211_IS_CHAN_A(c))
1159 type = 'a';
1160 else if (IEEE80211_IS_CHAN_ANYG(c))
1161 type = 'g';
1162 else if (IEEE80211_IS_CHAN_B(c))
1163 type = 'b';
1164 else
1165 type = 'f';
1166 if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c))
1167 cw = 40;
1168 else if (IEEE80211_IS_CHAN_HALF(c))
1169 cw = 10;
1170 else if (IEEE80211_IS_CHAN_QUARTER(c))
1171 cw = 5;
1172 else
1173 cw = 20;
1174 printf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n"
1175 , c->ic_ieee, c->ic_freq, type
1176 , cw
1177 , IEEE80211_IS_CHAN_HT40U(c) ? '+' :
1178 IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' '
1179 , c->ic_maxregpower
1180 , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0
1181 , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0
1182 );
1183 }
1184 }
1185
1186 static int
1187 media2mode(const struct ifmedia_entry *ime, uint32_t flags, uint16_t *mode)
1188 {
1189 switch (IFM_MODE(ime->ifm_media)) {
1190 case IFM_IEEE80211_11A:
1191 *mode = IEEE80211_MODE_11A;
1192 break;
1193 case IFM_IEEE80211_11B:
1194 *mode = IEEE80211_MODE_11B;
1195 break;
1196 case IFM_IEEE80211_11G:
1197 *mode = IEEE80211_MODE_11G;
1198 break;
1199 case IFM_IEEE80211_FH:
1200 *mode = IEEE80211_MODE_FH;
1201 break;
1202 case IFM_IEEE80211_11NA:
1203 *mode = IEEE80211_MODE_11NA;
1204 break;
1205 case IFM_IEEE80211_11NG:
1206 *mode = IEEE80211_MODE_11NG;
1207 break;
1208 case IFM_AUTO:
1209 *mode = IEEE80211_MODE_AUTO;
1210 break;
1211 default:
1212 return 0;
1213 }
1214 /*
1215 * Turbo mode is an ``option''.
1216 * XXX does not apply to AUTO
1217 */
1218 if (ime->ifm_media & IFM_IEEE80211_TURBO) {
1219 if (*mode == IEEE80211_MODE_11A) {
1220 if (flags & IEEE80211_F_TURBOP)
1221 *mode = IEEE80211_MODE_TURBO_A;
1222 else
1223 *mode = IEEE80211_MODE_STURBO_A;
1224 } else if (*mode == IEEE80211_MODE_11G)
1225 *mode = IEEE80211_MODE_TURBO_G;
1226 else
1227 return 0;
1228 }
1229 /* XXX HT40 +/- */
1230 return 1;
1231 }
1232
1233 /*
1234 * Handle a media change request on the underlying interface.
1235 */
1236 int
1237 ieee80211com_media_change(struct ifnet *ifp)
1238 {
1239 return EINVAL;
1240 }
1241
1242 /*
1243 * Handle a media change request on the vap interface.
1244 */
1245 int
1246 ieee80211_media_change(struct ifnet *ifp)
1247 {
1248 struct ieee80211vap *vap = ifp->if_softc;
1249 struct ifmedia_entry *ime = vap->iv_media.ifm_cur;
1250 uint16_t newmode;
1251
1252 if (!media2mode(ime, vap->iv_flags, &newmode))
1253 return EINVAL;
1254 if (vap->iv_des_mode != newmode) {
1255 vap->iv_des_mode = newmode;
1256 /* XXX kick state machine if up+running */
1257 }
1258 return 0;
1259 }
1260
1261 /*
1262 * Common code to calculate the media status word
1263 * from the operating mode and channel state.
1264 */
1265 static int
1266 media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan)
1267 {
1268 int status;
1269
1270 status = IFM_IEEE80211;
1271 switch (opmode) {
1272 case IEEE80211_M_STA:
1273 break;
1274 case IEEE80211_M_IBSS:
1275 status |= IFM_IEEE80211_ADHOC;
1276 break;
1277 case IEEE80211_M_HOSTAP:
1278 status |= IFM_IEEE80211_HOSTAP;
1279 break;
1280 case IEEE80211_M_MONITOR:
1281 status |= IFM_IEEE80211_MONITOR;
1282 break;
1283 case IEEE80211_M_AHDEMO:
1284 status |= IFM_IEEE80211_ADHOC | IFM_FLAG0;
1285 break;
1286 case IEEE80211_M_WDS:
1287 status |= IFM_IEEE80211_WDS;
1288 break;
1289 case IEEE80211_M_MBSS:
1290 status |= IFM_IEEE80211_MBSS;
1291 break;
1292 }
1293 if (IEEE80211_IS_CHAN_HTA(chan)) {
1294 status |= IFM_IEEE80211_11NA;
1295 } else if (IEEE80211_IS_CHAN_HTG(chan)) {
1296 status |= IFM_IEEE80211_11NG;
1297 } else if (IEEE80211_IS_CHAN_A(chan)) {
1298 status |= IFM_IEEE80211_11A;
1299 } else if (IEEE80211_IS_CHAN_B(chan)) {
1300 status |= IFM_IEEE80211_11B;
1301 } else if (IEEE80211_IS_CHAN_ANYG(chan)) {
1302 status |= IFM_IEEE80211_11G;
1303 } else if (IEEE80211_IS_CHAN_FHSS(chan)) {
1304 status |= IFM_IEEE80211_FH;
1305 }
1306 /* XXX else complain? */
1307
1308 if (IEEE80211_IS_CHAN_TURBO(chan))
1309 status |= IFM_IEEE80211_TURBO;
1310 #if 0
1311 if (IEEE80211_IS_CHAN_HT20(chan))
1312 status |= IFM_IEEE80211_HT20;
1313 if (IEEE80211_IS_CHAN_HT40(chan))
1314 status |= IFM_IEEE80211_HT40;
1315 #endif
1316 return status;
1317 }
1318
1319 static void
1320 ieee80211com_media_status(struct ifnet *ifp, struct ifmediareq *imr)
1321 {
1322 struct ieee80211com *ic = ifp->if_l2com;
1323 struct ieee80211vap *vap;
1324
1325 imr->ifm_status = IFM_AVALID;
1326 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
1327 if (vap->iv_ifp->if_flags & IFF_UP) {
1328 imr->ifm_status |= IFM_ACTIVE;
1329 break;
1330 }
1331 imr->ifm_active = media_status(ic->ic_opmode, ic->ic_curchan);
1332 if (imr->ifm_status & IFM_ACTIVE)
1333 imr->ifm_current = imr->ifm_active;
1334 }
1335
1336 void
1337 ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr)
1338 {
1339 struct ieee80211vap *vap = ifp->if_softc;
1340 struct ieee80211com *ic = vap->iv_ic;
1341 enum ieee80211_phymode mode;
1342
1343 imr->ifm_status = IFM_AVALID;
1344 /*
1345 * NB: use the current channel's mode to lock down a xmit
1346 * rate only when running; otherwise we may have a mismatch
1347 * in which case the rate will not be convertible.
1348 */
1349 if (vap->iv_state == IEEE80211_S_RUN) {
1350 imr->ifm_status |= IFM_ACTIVE;
1351 mode = ieee80211_chan2mode(ic->ic_curchan);
1352 } else
1353 mode = IEEE80211_MODE_AUTO;
1354 imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan);
1355 /*
1356 * Calculate a current rate if possible.
1357 */
1358 if (vap->iv_txparms[mode].ucastrate != IEEE80211_FIXED_RATE_NONE) {
1359 /*
1360 * A fixed rate is set, report that.
1361 */
1362 imr->ifm_active |= ieee80211_rate2media(ic,
1363 vap->iv_txparms[mode].ucastrate, mode);
1364 } else if (vap->iv_opmode == IEEE80211_M_STA) {
1365 /*
1366 * In station mode report the current transmit rate.
1367 */
1368 imr->ifm_active |= ieee80211_rate2media(ic,
1369 vap->iv_bss->ni_txrate, mode);
1370 } else
1371 imr->ifm_active |= IFM_AUTO;
1372 if (imr->ifm_status & IFM_ACTIVE)
1373 imr->ifm_current = imr->ifm_active;
1374 }
1375
1376 /*
1377 * Set the current phy mode and recalculate the active channel
1378 * set based on the available channels for this mode. Also
1379 * select a new default/current channel if the current one is
1380 * inappropriate for this mode.
1381 */
1382 int
1383 ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode)
1384 {
1385 /*
1386 * Adjust basic rates in 11b/11g supported rate set.
1387 * Note that if operating on a hal/quarter rate channel
1388 * this is a noop as those rates sets are different
1389 * and used instead.
1390 */
1391 if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B)
1392 ieee80211_setbasicrates(&ic->ic_sup_rates[mode], mode);
1393
1394 ic->ic_curmode = mode;
1395 ieee80211_reset_erp(ic); /* reset ERP state */
1396
1397 return 0;
1398 }
1399
1400 /*
1401 * Return the phy mode for with the specified channel.
1402 */
1403 enum ieee80211_phymode
1404 ieee80211_chan2mode(const struct ieee80211_channel *chan)
1405 {
1406
1407 if (IEEE80211_IS_CHAN_HTA(chan))
1408 return IEEE80211_MODE_11NA;
1409 else if (IEEE80211_IS_CHAN_HTG(chan))
1410 return IEEE80211_MODE_11NG;
1411 else if (IEEE80211_IS_CHAN_108G(chan))
1412 return IEEE80211_MODE_TURBO_G;
1413 else if (IEEE80211_IS_CHAN_ST(chan))
1414 return IEEE80211_MODE_STURBO_A;
1415 else if (IEEE80211_IS_CHAN_TURBO(chan))
1416 return IEEE80211_MODE_TURBO_A;
1417 else if (IEEE80211_IS_CHAN_HALF(chan))
1418 return IEEE80211_MODE_HALF;
1419 else if (IEEE80211_IS_CHAN_QUARTER(chan))
1420 return IEEE80211_MODE_QUARTER;
1421 else if (IEEE80211_IS_CHAN_A(chan))
1422 return IEEE80211_MODE_11A;
1423 else if (IEEE80211_IS_CHAN_ANYG(chan))
1424 return IEEE80211_MODE_11G;
1425 else if (IEEE80211_IS_CHAN_B(chan))
1426 return IEEE80211_MODE_11B;
1427 else if (IEEE80211_IS_CHAN_FHSS(chan))
1428 return IEEE80211_MODE_FH;
1429
1430 /* NB: should not get here */
1431 printf("%s: cannot map channel to mode; freq %u flags 0x%x\n",
1432 __func__, chan->ic_freq, chan->ic_flags);
1433 return IEEE80211_MODE_11B;
1434 }
1435
1436 struct ratemedia {
1437 u_int match; /* rate + mode */
1438 u_int media; /* if_media rate */
1439 };
1440
1441 static int
1442 findmedia(const struct ratemedia rates[], int n, u_int match)
1443 {
1444 int i;
1445
1446 for (i = 0; i < n; i++)
1447 if (rates[i].match == match)
1448 return rates[i].media;
1449 return IFM_AUTO;
1450 }
1451
1452 /*
1453 * Convert IEEE80211 rate value to ifmedia subtype.
1454 * Rate is either a legacy rate in units of 0.5Mbps
1455 * or an MCS index.
1456 */
1457 int
1458 ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode)
1459 {
1460 #define N(a) (sizeof(a) / sizeof(a[0]))
1461 static const struct ratemedia rates[] = {
1462 { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 },
1463 { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 },
1464 { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 },
1465 { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 },
1466 { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 },
1467 { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 },
1468 { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 },
1469 { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 },
1470 { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 },
1471 { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 },
1472 { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 },
1473 { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 },
1474 { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 },
1475 { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 },
1476 { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 },
1477 { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 },
1478 { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 },
1479 { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 },
1480 { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 },
1481 { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 },
1482 { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 },
1483 { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 },
1484 { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 },
1485 { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 },
1486 { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 },
1487 { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 },
1488 { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 },
1489 { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 },
1490 { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 },
1491 { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 },
1492 /* NB: OFDM72 doesn't realy exist so we don't handle it */
1493 };
1494 static const struct ratemedia htrates[] = {
1495 { 0, IFM_IEEE80211_MCS },
1496 { 1, IFM_IEEE80211_MCS },
1497 { 2, IFM_IEEE80211_MCS },
1498 { 3, IFM_IEEE80211_MCS },
1499 { 4, IFM_IEEE80211_MCS },
1500 { 5, IFM_IEEE80211_MCS },
1501 { 6, IFM_IEEE80211_MCS },
1502 { 7, IFM_IEEE80211_MCS },
1503 { 8, IFM_IEEE80211_MCS },
1504 { 9, IFM_IEEE80211_MCS },
1505 { 10, IFM_IEEE80211_MCS },
1506 { 11, IFM_IEEE80211_MCS },
1507 { 12, IFM_IEEE80211_MCS },
1508 { 13, IFM_IEEE80211_MCS },
1509 { 14, IFM_IEEE80211_MCS },
1510 { 15, IFM_IEEE80211_MCS },
1511 };
1512 int m;
1513
1514 /*
1515 * Check 11n rates first for match as an MCS.
1516 */
1517 if (mode == IEEE80211_MODE_11NA) {
1518 if (rate & IEEE80211_RATE_MCS) {
1519 rate &= ~IEEE80211_RATE_MCS;
1520 m = findmedia(htrates, N(htrates), rate);
1521 if (m != IFM_AUTO)
1522 return m | IFM_IEEE80211_11NA;
1523 }
1524 } else if (mode == IEEE80211_MODE_11NG) {
1525 /* NB: 12 is ambiguous, it will be treated as an MCS */
1526 if (rate & IEEE80211_RATE_MCS) {
1527 rate &= ~IEEE80211_RATE_MCS;
1528 m = findmedia(htrates, N(htrates), rate);
1529 if (m != IFM_AUTO)
1530 return m | IFM_IEEE80211_11NG;
1531 }
1532 }
1533 rate &= IEEE80211_RATE_VAL;
1534 switch (mode) {
1535 case IEEE80211_MODE_11A:
1536 case IEEE80211_MODE_HALF: /* XXX good 'nuf */
1537 case IEEE80211_MODE_QUARTER:
1538 case IEEE80211_MODE_11NA:
1539 case IEEE80211_MODE_TURBO_A:
1540 case IEEE80211_MODE_STURBO_A:
1541 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11A);
1542 case IEEE80211_MODE_11B:
1543 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11B);
1544 case IEEE80211_MODE_FH:
1545 return findmedia(rates, N(rates), rate | IFM_IEEE80211_FH);
1546 case IEEE80211_MODE_AUTO:
1547 /* NB: ic may be NULL for some drivers */
1548 if (ic != NULL && ic->ic_phytype == IEEE80211_T_FH)
1549 return findmedia(rates, N(rates),
1550 rate | IFM_IEEE80211_FH);
1551 /* NB: hack, 11g matches both 11b+11a rates */
1552 /* fall thru... */
1553 case IEEE80211_MODE_11G:
1554 case IEEE80211_MODE_11NG:
1555 case IEEE80211_MODE_TURBO_G:
1556 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11G);
1557 }
1558 return IFM_AUTO;
1559 #undef N
1560 }
1561
1562 int
1563 ieee80211_media2rate(int mword)
1564 {
1565 #define N(a) (sizeof(a) / sizeof(a[0]))
1566 static const int ieeerates[] = {
1567 -1, /* IFM_AUTO */
1568 0, /* IFM_MANUAL */
1569 0, /* IFM_NONE */
1570 2, /* IFM_IEEE80211_FH1 */
1571 4, /* IFM_IEEE80211_FH2 */
1572 2, /* IFM_IEEE80211_DS1 */
1573 4, /* IFM_IEEE80211_DS2 */
1574 11, /* IFM_IEEE80211_DS5 */
1575 22, /* IFM_IEEE80211_DS11 */
1576 44, /* IFM_IEEE80211_DS22 */
1577 12, /* IFM_IEEE80211_OFDM6 */
1578 18, /* IFM_IEEE80211_OFDM9 */
1579 24, /* IFM_IEEE80211_OFDM12 */
1580 36, /* IFM_IEEE80211_OFDM18 */
1581 48, /* IFM_IEEE80211_OFDM24 */
1582 72, /* IFM_IEEE80211_OFDM36 */
1583 96, /* IFM_IEEE80211_OFDM48 */
1584 108, /* IFM_IEEE80211_OFDM54 */
1585 144, /* IFM_IEEE80211_OFDM72 */
1586 0, /* IFM_IEEE80211_DS354k */
1587 0, /* IFM_IEEE80211_DS512k */
1588 6, /* IFM_IEEE80211_OFDM3 */
1589 9, /* IFM_IEEE80211_OFDM4 */
1590 54, /* IFM_IEEE80211_OFDM27 */
1591 -1, /* IFM_IEEE80211_MCS */
1592 };
1593 return IFM_SUBTYPE(mword) < N(ieeerates) ?
1594 ieeerates[IFM_SUBTYPE(mword)] : 0;
1595 #undef N
1596 }
1597
1598 /*
1599 * The following hash function is adapted from "Hash Functions" by Bob Jenkins
1600 * ("Algorithm Alley", Dr. Dobbs Journal, September 1997).
1601 */
1602 #define mix(a, b, c) \
1603 do { \
1604 a -= b; a -= c; a ^= (c >> 13); \
1605 b -= c; b -= a; b ^= (a << 8); \
1606 c -= a; c -= b; c ^= (b >> 13); \
1607 a -= b; a -= c; a ^= (c >> 12); \
1608 b -= c; b -= a; b ^= (a << 16); \
1609 c -= a; c -= b; c ^= (b >> 5); \
1610 a -= b; a -= c; a ^= (c >> 3); \
1611 b -= c; b -= a; b ^= (a << 10); \
1612 c -= a; c -= b; c ^= (b >> 15); \
1613 } while (/*CONSTCOND*/0)
1614
1615 uint32_t
1616 ieee80211_mac_hash(const struct ieee80211com *ic,
1617 const uint8_t addr[IEEE80211_ADDR_LEN])
1618 {
1619 uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = ic->ic_hash_key;
1620
1621 b += addr[5] << 8;
1622 b += addr[4];
1623 a += addr[3] << 24;
1624 a += addr[2] << 16;
1625 a += addr[1] << 8;
1626 a += addr[0];
1627
1628 mix(a, b, c);
1629
1630 return c;
1631 }
1632 #undef mix
Cache object: 948e47335f1f4be74d1ff04812619afc
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