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/8.3/sys/net80211/ieee80211.c 215557 2010-11-20 12:24:26Z bschmidt $");
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 #include <net80211/ieee80211_ratectl.h>
53
54 #include <net/bpf.h>
55
56 const char *ieee80211_phymode_name[IEEE80211_MODE_MAX] = {
57 [IEEE80211_MODE_AUTO] = "auto",
58 [IEEE80211_MODE_11A] = "11a",
59 [IEEE80211_MODE_11B] = "11b",
60 [IEEE80211_MODE_11G] = "11g",
61 [IEEE80211_MODE_FH] = "FH",
62 [IEEE80211_MODE_TURBO_A] = "turboA",
63 [IEEE80211_MODE_TURBO_G] = "turboG",
64 [IEEE80211_MODE_STURBO_A] = "sturboA",
65 [IEEE80211_MODE_HALF] = "half",
66 [IEEE80211_MODE_QUARTER] = "quarter",
67 [IEEE80211_MODE_11NA] = "11na",
68 [IEEE80211_MODE_11NG] = "11ng",
69 };
70 /* map ieee80211_opmode to the corresponding capability bit */
71 const int ieee80211_opcap[IEEE80211_OPMODE_MAX] = {
72 [IEEE80211_M_IBSS] = IEEE80211_C_IBSS,
73 [IEEE80211_M_WDS] = IEEE80211_C_WDS,
74 [IEEE80211_M_STA] = IEEE80211_C_STA,
75 [IEEE80211_M_AHDEMO] = IEEE80211_C_AHDEMO,
76 [IEEE80211_M_HOSTAP] = IEEE80211_C_HOSTAP,
77 [IEEE80211_M_MONITOR] = IEEE80211_C_MONITOR,
78 #ifdef IEEE80211_SUPPORT_MESH
79 [IEEE80211_M_MBSS] = IEEE80211_C_MBSS,
80 #endif
81 };
82
83 static const uint8_t ieee80211broadcastaddr[IEEE80211_ADDR_LEN] =
84 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
85
86 static void ieee80211_syncflag_locked(struct ieee80211com *ic, int flag);
87 static void ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag);
88 static void ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag);
89 static int ieee80211_media_setup(struct ieee80211com *ic,
90 struct ifmedia *media, int caps, int addsta,
91 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat);
92 static void ieee80211com_media_status(struct ifnet *, struct ifmediareq *);
93 static int ieee80211com_media_change(struct ifnet *);
94 static int media_status(enum ieee80211_opmode,
95 const struct ieee80211_channel *);
96
97 MALLOC_DEFINE(M_80211_VAP, "80211vap", "802.11 vap state");
98
99 /*
100 * Default supported rates for 802.11 operation (in IEEE .5Mb units).
101 */
102 #define B(r) ((r) | IEEE80211_RATE_BASIC)
103 static const struct ieee80211_rateset ieee80211_rateset_11a =
104 { 8, { B(12), 18, B(24), 36, B(48), 72, 96, 108 } };
105 static const struct ieee80211_rateset ieee80211_rateset_half =
106 { 8, { B(6), 9, B(12), 18, B(24), 36, 48, 54 } };
107 static const struct ieee80211_rateset ieee80211_rateset_quarter =
108 { 8, { B(3), 4, B(6), 9, B(12), 18, 24, 27 } };
109 static const struct ieee80211_rateset ieee80211_rateset_11b =
110 { 4, { B(2), B(4), B(11), B(22) } };
111 /* NB: OFDM rates are handled specially based on mode */
112 static const struct ieee80211_rateset ieee80211_rateset_11g =
113 { 12, { B(2), B(4), B(11), B(22), 12, 18, 24, 36, 48, 72, 96, 108 } };
114 #undef B
115
116 /*
117 * Fill in 802.11 available channel set, mark
118 * all available channels as active, and pick
119 * a default channel if not already specified.
120 */
121 static void
122 ieee80211_chan_init(struct ieee80211com *ic)
123 {
124 #define DEFAULTRATES(m, def) do { \
125 if (ic->ic_sup_rates[m].rs_nrates == 0) \
126 ic->ic_sup_rates[m] = def; \
127 } while (0)
128 struct ieee80211_channel *c;
129 int i;
130
131 KASSERT(0 < ic->ic_nchans && ic->ic_nchans <= IEEE80211_CHAN_MAX,
132 ("invalid number of channels specified: %u", ic->ic_nchans));
133 memset(ic->ic_chan_avail, 0, sizeof(ic->ic_chan_avail));
134 memset(ic->ic_modecaps, 0, sizeof(ic->ic_modecaps));
135 setbit(ic->ic_modecaps, IEEE80211_MODE_AUTO);
136 for (i = 0; i < ic->ic_nchans; i++) {
137 c = &ic->ic_channels[i];
138 KASSERT(c->ic_flags != 0, ("channel with no flags"));
139 /*
140 * Help drivers that work only with frequencies by filling
141 * in IEEE channel #'s if not already calculated. Note this
142 * mimics similar work done in ieee80211_setregdomain when
143 * changing regulatory state.
144 */
145 if (c->ic_ieee == 0)
146 c->ic_ieee = ieee80211_mhz2ieee(c->ic_freq,c->ic_flags);
147 if (IEEE80211_IS_CHAN_HT40(c) && c->ic_extieee == 0)
148 c->ic_extieee = ieee80211_mhz2ieee(c->ic_freq +
149 (IEEE80211_IS_CHAN_HT40U(c) ? 20 : -20),
150 c->ic_flags);
151 /* default max tx power to max regulatory */
152 if (c->ic_maxpower == 0)
153 c->ic_maxpower = 2*c->ic_maxregpower;
154 setbit(ic->ic_chan_avail, c->ic_ieee);
155 /*
156 * Identify mode capabilities.
157 */
158 if (IEEE80211_IS_CHAN_A(c))
159 setbit(ic->ic_modecaps, IEEE80211_MODE_11A);
160 if (IEEE80211_IS_CHAN_B(c))
161 setbit(ic->ic_modecaps, IEEE80211_MODE_11B);
162 if (IEEE80211_IS_CHAN_ANYG(c))
163 setbit(ic->ic_modecaps, IEEE80211_MODE_11G);
164 if (IEEE80211_IS_CHAN_FHSS(c))
165 setbit(ic->ic_modecaps, IEEE80211_MODE_FH);
166 if (IEEE80211_IS_CHAN_108A(c))
167 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_A);
168 if (IEEE80211_IS_CHAN_108G(c))
169 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_G);
170 if (IEEE80211_IS_CHAN_ST(c))
171 setbit(ic->ic_modecaps, IEEE80211_MODE_STURBO_A);
172 if (IEEE80211_IS_CHAN_HALF(c))
173 setbit(ic->ic_modecaps, IEEE80211_MODE_HALF);
174 if (IEEE80211_IS_CHAN_QUARTER(c))
175 setbit(ic->ic_modecaps, IEEE80211_MODE_QUARTER);
176 if (IEEE80211_IS_CHAN_HTA(c))
177 setbit(ic->ic_modecaps, IEEE80211_MODE_11NA);
178 if (IEEE80211_IS_CHAN_HTG(c))
179 setbit(ic->ic_modecaps, IEEE80211_MODE_11NG);
180 }
181 /* initialize candidate channels to all available */
182 memcpy(ic->ic_chan_active, ic->ic_chan_avail,
183 sizeof(ic->ic_chan_avail));
184
185 /* sort channel table to allow lookup optimizations */
186 ieee80211_sort_channels(ic->ic_channels, ic->ic_nchans);
187
188 /* invalidate any previous state */
189 ic->ic_bsschan = IEEE80211_CHAN_ANYC;
190 ic->ic_prevchan = NULL;
191 ic->ic_csa_newchan = NULL;
192 /* arbitrarily pick the first channel */
193 ic->ic_curchan = &ic->ic_channels[0];
194 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
195
196 /* fillin well-known rate sets if driver has not specified */
197 DEFAULTRATES(IEEE80211_MODE_11B, ieee80211_rateset_11b);
198 DEFAULTRATES(IEEE80211_MODE_11G, ieee80211_rateset_11g);
199 DEFAULTRATES(IEEE80211_MODE_11A, ieee80211_rateset_11a);
200 DEFAULTRATES(IEEE80211_MODE_TURBO_A, ieee80211_rateset_11a);
201 DEFAULTRATES(IEEE80211_MODE_TURBO_G, ieee80211_rateset_11g);
202 DEFAULTRATES(IEEE80211_MODE_STURBO_A, ieee80211_rateset_11a);
203 DEFAULTRATES(IEEE80211_MODE_HALF, ieee80211_rateset_half);
204 DEFAULTRATES(IEEE80211_MODE_QUARTER, ieee80211_rateset_quarter);
205 DEFAULTRATES(IEEE80211_MODE_11NA, ieee80211_rateset_11a);
206 DEFAULTRATES(IEEE80211_MODE_11NG, ieee80211_rateset_11g);
207
208 /*
209 * Set auto mode to reset active channel state and any desired channel.
210 */
211 (void) ieee80211_setmode(ic, IEEE80211_MODE_AUTO);
212 #undef DEFAULTRATES
213 }
214
215 static void
216 null_update_mcast(struct ifnet *ifp)
217 {
218 if_printf(ifp, "need multicast update callback\n");
219 }
220
221 static void
222 null_update_promisc(struct ifnet *ifp)
223 {
224 if_printf(ifp, "need promiscuous mode update callback\n");
225 }
226
227 static int
228 null_transmit(struct ifnet *ifp, struct mbuf *m)
229 {
230 m_freem(m);
231 ifp->if_oerrors++;
232 return EACCES; /* XXX EIO/EPERM? */
233 }
234
235 static int
236 null_output(struct ifnet *ifp, struct mbuf *m,
237 struct sockaddr *dst, struct route *ro)
238 {
239 if_printf(ifp, "discard raw packet\n");
240 return null_transmit(ifp, m);
241 }
242
243 static void
244 null_input(struct ifnet *ifp, struct mbuf *m)
245 {
246 if_printf(ifp, "if_input should not be called\n");
247 m_freem(m);
248 }
249
250 /*
251 * Attach/setup the common net80211 state. Called by
252 * the driver on attach to prior to creating any vap's.
253 */
254 void
255 ieee80211_ifattach(struct ieee80211com *ic,
256 const uint8_t macaddr[IEEE80211_ADDR_LEN])
257 {
258 struct ifnet *ifp = ic->ic_ifp;
259 struct sockaddr_dl *sdl;
260 struct ifaddr *ifa;
261
262 KASSERT(ifp->if_type == IFT_IEEE80211, ("if_type %d", ifp->if_type));
263
264 IEEE80211_LOCK_INIT(ic, ifp->if_xname);
265 TAILQ_INIT(&ic->ic_vaps);
266
267 /* Create a taskqueue for all state changes */
268 ic->ic_tq = taskqueue_create("ic_taskq", M_WAITOK | M_ZERO,
269 taskqueue_thread_enqueue, &ic->ic_tq);
270 taskqueue_start_threads(&ic->ic_tq, 1, PI_NET, "%s taskq",
271 ifp->if_xname);
272 /*
273 * Fill in 802.11 available channel set, mark all
274 * available channels as active, and pick a default
275 * channel if not already specified.
276 */
277 ieee80211_media_init(ic);
278
279 ic->ic_update_mcast = null_update_mcast;
280 ic->ic_update_promisc = null_update_promisc;
281
282 ic->ic_hash_key = arc4random();
283 ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT;
284 ic->ic_lintval = ic->ic_bintval;
285 ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX;
286
287 ieee80211_crypto_attach(ic);
288 ieee80211_node_attach(ic);
289 ieee80211_power_attach(ic);
290 ieee80211_proto_attach(ic);
291 #ifdef IEEE80211_SUPPORT_SUPERG
292 ieee80211_superg_attach(ic);
293 #endif
294 ieee80211_ht_attach(ic);
295 ieee80211_scan_attach(ic);
296 ieee80211_regdomain_attach(ic);
297 ieee80211_dfs_attach(ic);
298
299 ieee80211_sysctl_attach(ic);
300
301 ifp->if_addrlen = IEEE80211_ADDR_LEN;
302 ifp->if_hdrlen = 0;
303 if_attach(ifp);
304 ifp->if_mtu = IEEE80211_MTU_MAX;
305 ifp->if_broadcastaddr = ieee80211broadcastaddr;
306 ifp->if_output = null_output;
307 ifp->if_input = null_input; /* just in case */
308 ifp->if_resolvemulti = NULL; /* NB: callers check */
309
310 ifa = ifaddr_byindex(ifp->if_index);
311 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__));
312 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
313 sdl->sdl_type = IFT_ETHER; /* XXX IFT_IEEE80211? */
314 sdl->sdl_alen = IEEE80211_ADDR_LEN;
315 IEEE80211_ADDR_COPY(LLADDR(sdl), macaddr);
316 ifa_free(ifa);
317 }
318
319 /*
320 * Detach net80211 state on device detach. Tear down
321 * all vap's and reclaim all common state prior to the
322 * device state going away. Note we may call back into
323 * driver; it must be prepared for this.
324 */
325 void
326 ieee80211_ifdetach(struct ieee80211com *ic)
327 {
328 struct ifnet *ifp = ic->ic_ifp;
329 struct ieee80211vap *vap;
330
331 if_detach(ifp);
332
333 while ((vap = TAILQ_FIRST(&ic->ic_vaps)) != NULL)
334 ieee80211_vap_destroy(vap);
335 ieee80211_waitfor_parent(ic);
336
337 ieee80211_sysctl_detach(ic);
338 ieee80211_dfs_detach(ic);
339 ieee80211_regdomain_detach(ic);
340 ieee80211_scan_detach(ic);
341 #ifdef IEEE80211_SUPPORT_SUPERG
342 ieee80211_superg_detach(ic);
343 #endif
344 ieee80211_ht_detach(ic);
345 /* NB: must be called before ieee80211_node_detach */
346 ieee80211_proto_detach(ic);
347 ieee80211_crypto_detach(ic);
348 ieee80211_power_detach(ic);
349 ieee80211_node_detach(ic);
350
351 ifmedia_removeall(&ic->ic_media);
352 taskqueue_free(ic->ic_tq);
353 IEEE80211_LOCK_DESTROY(ic);
354 }
355
356 /*
357 * Default reset method for use with the ioctl support. This
358 * method is invoked after any state change in the 802.11
359 * layer that should be propagated to the hardware but not
360 * require re-initialization of the 802.11 state machine (e.g
361 * rescanning for an ap). We always return ENETRESET which
362 * should cause the driver to re-initialize the device. Drivers
363 * can override this method to implement more optimized support.
364 */
365 static int
366 default_reset(struct ieee80211vap *vap, u_long cmd)
367 {
368 return ENETRESET;
369 }
370
371 /*
372 * Prepare a vap for use. Drivers use this call to
373 * setup net80211 state in new vap's prior attaching
374 * them with ieee80211_vap_attach (below).
375 */
376 int
377 ieee80211_vap_setup(struct ieee80211com *ic, struct ieee80211vap *vap,
378 const char name[IFNAMSIZ], int unit, int opmode, int flags,
379 const uint8_t bssid[IEEE80211_ADDR_LEN],
380 const uint8_t macaddr[IEEE80211_ADDR_LEN])
381 {
382 struct ifnet *ifp;
383
384 ifp = if_alloc(IFT_ETHER);
385 if (ifp == NULL) {
386 if_printf(ic->ic_ifp, "%s: unable to allocate ifnet\n",
387 __func__);
388 return ENOMEM;
389 }
390 if_initname(ifp, name, unit);
391 ifp->if_softc = vap; /* back pointer */
392 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST;
393 ifp->if_start = ieee80211_start;
394 ifp->if_ioctl = ieee80211_ioctl;
395 ifp->if_init = ieee80211_init;
396 /* NB: input+output filled in by ether_ifattach */
397 IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen);
398 ifp->if_snd.ifq_drv_maxlen = ifqmaxlen;
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 /* auto-generated or user supplied MAC address */
445 if (flags & (IEEE80211_CLONE_BSSID|IEEE80211_CLONE_MACADDR))
446 vap->iv_flags_ext |= IEEE80211_FEXT_UNIQMAC;
447 /*
448 * Enable various functionality by default if we're
449 * capable; the driver can override us if it knows better.
450 */
451 if (vap->iv_caps & IEEE80211_C_WME)
452 vap->iv_flags |= IEEE80211_F_WME;
453 if (vap->iv_caps & IEEE80211_C_BURST)
454 vap->iv_flags |= IEEE80211_F_BURST;
455 /* NB: bg scanning only makes sense for station mode right now */
456 if (vap->iv_opmode == IEEE80211_M_STA &&
457 (vap->iv_caps & IEEE80211_C_BGSCAN))
458 vap->iv_flags |= IEEE80211_F_BGSCAN;
459 vap->iv_flags |= IEEE80211_F_DOTH; /* XXX no cap, just ena */
460 /* NB: DFS support only makes sense for ap mode right now */
461 if (vap->iv_opmode == IEEE80211_M_HOSTAP &&
462 (vap->iv_caps & IEEE80211_C_DFS))
463 vap->iv_flags_ext |= IEEE80211_FEXT_DFS;
464
465 vap->iv_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */
466 vap->iv_bmissthreshold = IEEE80211_HWBMISS_DEFAULT;
467 vap->iv_dtim_period = IEEE80211_DTIM_DEFAULT;
468 /*
469 * Install a default reset method for the ioctl support;
470 * the driver can override this.
471 */
472 vap->iv_reset = default_reset;
473
474 IEEE80211_ADDR_COPY(vap->iv_myaddr, macaddr);
475
476 ieee80211_sysctl_vattach(vap);
477 ieee80211_crypto_vattach(vap);
478 ieee80211_node_vattach(vap);
479 ieee80211_power_vattach(vap);
480 ieee80211_proto_vattach(vap);
481 #ifdef IEEE80211_SUPPORT_SUPERG
482 ieee80211_superg_vattach(vap);
483 #endif
484 ieee80211_ht_vattach(vap);
485 ieee80211_scan_vattach(vap);
486 ieee80211_regdomain_vattach(vap);
487 ieee80211_radiotap_vattach(vap);
488 ieee80211_ratectl_set(vap, IEEE80211_RATECTL_NONE);
489
490 return 0;
491 }
492
493 /*
494 * Activate a vap. State should have been prepared with a
495 * call to ieee80211_vap_setup and by the driver. On return
496 * from this call the vap is ready for use.
497 */
498 int
499 ieee80211_vap_attach(struct ieee80211vap *vap,
500 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat)
501 {
502 struct ifnet *ifp = vap->iv_ifp;
503 struct ieee80211com *ic = vap->iv_ic;
504 struct ifmediareq imr;
505 int maxrate;
506
507 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
508 "%s: %s parent %s flags 0x%x flags_ext 0x%x\n",
509 __func__, ieee80211_opmode_name[vap->iv_opmode],
510 ic->ic_ifp->if_xname, vap->iv_flags, vap->iv_flags_ext);
511
512 /*
513 * Do late attach work that cannot happen until after
514 * the driver has had a chance to override defaults.
515 */
516 ieee80211_node_latevattach(vap);
517 ieee80211_power_latevattach(vap);
518
519 maxrate = ieee80211_media_setup(ic, &vap->iv_media, vap->iv_caps,
520 vap->iv_opmode == IEEE80211_M_STA, media_change, media_stat);
521 ieee80211_media_status(ifp, &imr);
522 /* NB: strip explicit mode; we're actually in autoselect */
523 ifmedia_set(&vap->iv_media,
524 imr.ifm_active &~ (IFM_MMASK | IFM_IEEE80211_TURBO));
525 if (maxrate)
526 ifp->if_baudrate = IF_Mbps(maxrate);
527
528 ether_ifattach(ifp, vap->iv_myaddr);
529 if (vap->iv_opmode == IEEE80211_M_MONITOR) {
530 /* NB: disallow transmit */
531 ifp->if_transmit = null_transmit;
532 ifp->if_output = null_output;
533 } else {
534 /* hook output method setup by ether_ifattach */
535 vap->iv_output = ifp->if_output;
536 ifp->if_output = ieee80211_output;
537 }
538 /* NB: if_mtu set by ether_ifattach to ETHERMTU */
539
540 IEEE80211_LOCK(ic);
541 TAILQ_INSERT_TAIL(&ic->ic_vaps, vap, iv_next);
542 ieee80211_syncflag_locked(ic, IEEE80211_F_WME);
543 #ifdef IEEE80211_SUPPORT_SUPERG
544 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP);
545 #endif
546 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF);
547 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST);
548 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT);
549 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40);
550 ieee80211_syncifflag_locked(ic, IFF_PROMISC);
551 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI);
552 IEEE80211_UNLOCK(ic);
553
554 return 1;
555 }
556
557 /*
558 * Tear down vap state and reclaim the ifnet.
559 * The driver is assumed to have prepared for
560 * this; e.g. by turning off interrupts for the
561 * underlying device.
562 */
563 void
564 ieee80211_vap_detach(struct ieee80211vap *vap)
565 {
566 struct ieee80211com *ic = vap->iv_ic;
567 struct ifnet *ifp = vap->iv_ifp;
568
569 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s parent %s\n",
570 __func__, ieee80211_opmode_name[vap->iv_opmode],
571 ic->ic_ifp->if_xname);
572
573 /* NB: bpfdetach is called by ether_ifdetach and claims all taps */
574 ether_ifdetach(ifp);
575
576 ieee80211_stop(vap);
577
578 /*
579 * Flush any deferred vap tasks.
580 */
581 ieee80211_draintask(ic, &vap->iv_nstate_task);
582 ieee80211_draintask(ic, &vap->iv_swbmiss_task);
583
584 /* XXX band-aid until ifnet handles this for us */
585 taskqueue_drain(taskqueue_swi, &ifp->if_linktask);
586
587 IEEE80211_LOCK(ic);
588 KASSERT(vap->iv_state == IEEE80211_S_INIT , ("vap still running"));
589 TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next);
590 ieee80211_syncflag_locked(ic, IEEE80211_F_WME);
591 #ifdef IEEE80211_SUPPORT_SUPERG
592 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP);
593 #endif
594 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF);
595 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST);
596 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT);
597 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40);
598 /* NB: this handles the bpfdetach done below */
599 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_BPF);
600 ieee80211_syncifflag_locked(ic, IFF_PROMISC);
601 ieee80211_syncifflag_locked(ic, IFF_ALLMULTI);
602 IEEE80211_UNLOCK(ic);
603
604 ifmedia_removeall(&vap->iv_media);
605
606 ieee80211_radiotap_vdetach(vap);
607 ieee80211_regdomain_vdetach(vap);
608 ieee80211_scan_vdetach(vap);
609 #ifdef IEEE80211_SUPPORT_SUPERG
610 ieee80211_superg_vdetach(vap);
611 #endif
612 ieee80211_ht_vdetach(vap);
613 /* NB: must be before ieee80211_node_vdetach */
614 ieee80211_proto_vdetach(vap);
615 ieee80211_crypto_vdetach(vap);
616 ieee80211_power_vdetach(vap);
617 ieee80211_node_vdetach(vap);
618 ieee80211_sysctl_vdetach(vap);
619
620 if_free(ifp);
621 }
622
623 /*
624 * Synchronize flag bit state in the parent ifnet structure
625 * according to the state of all vap ifnet's. This is used,
626 * for example, to handle IFF_PROMISC and IFF_ALLMULTI.
627 */
628 void
629 ieee80211_syncifflag_locked(struct ieee80211com *ic, int flag)
630 {
631 struct ifnet *ifp = ic->ic_ifp;
632 struct ieee80211vap *vap;
633 int bit, oflags;
634
635 IEEE80211_LOCK_ASSERT(ic);
636
637 bit = 0;
638 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
639 if (vap->iv_ifp->if_flags & flag) {
640 /*
641 * XXX the bridge sets PROMISC but we don't want to
642 * enable it on the device, discard here so all the
643 * drivers don't need to special-case it
644 */
645 if (flag == IFF_PROMISC &&
646 !(vap->iv_opmode == IEEE80211_M_MONITOR ||
647 (vap->iv_opmode == IEEE80211_M_AHDEMO &&
648 (vap->iv_caps & IEEE80211_C_TDMA) == 0)))
649 continue;
650 bit = 1;
651 break;
652 }
653 oflags = ifp->if_flags;
654 if (bit)
655 ifp->if_flags |= flag;
656 else
657 ifp->if_flags &= ~flag;
658 if ((ifp->if_flags ^ oflags) & flag) {
659 /* XXX should we return 1/0 and let caller do this? */
660 if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
661 if (flag == IFF_PROMISC)
662 ieee80211_runtask(ic, &ic->ic_promisc_task);
663 else if (flag == IFF_ALLMULTI)
664 ieee80211_runtask(ic, &ic->ic_mcast_task);
665 }
666 }
667 }
668
669 /*
670 * Synchronize flag bit state in the com structure
671 * according to the state of all vap's. This is used,
672 * for example, to handle state changes via ioctls.
673 */
674 static void
675 ieee80211_syncflag_locked(struct ieee80211com *ic, int flag)
676 {
677 struct ieee80211vap *vap;
678 int bit;
679
680 IEEE80211_LOCK_ASSERT(ic);
681
682 bit = 0;
683 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
684 if (vap->iv_flags & flag) {
685 bit = 1;
686 break;
687 }
688 if (bit)
689 ic->ic_flags |= flag;
690 else
691 ic->ic_flags &= ~flag;
692 }
693
694 void
695 ieee80211_syncflag(struct ieee80211vap *vap, int flag)
696 {
697 struct ieee80211com *ic = vap->iv_ic;
698
699 IEEE80211_LOCK(ic);
700 if (flag < 0) {
701 flag = -flag;
702 vap->iv_flags &= ~flag;
703 } else
704 vap->iv_flags |= flag;
705 ieee80211_syncflag_locked(ic, flag);
706 IEEE80211_UNLOCK(ic);
707 }
708
709 /*
710 * Synchronize flags_ht bit state in the com structure
711 * according to the state of all vap's. This is used,
712 * for example, to handle state changes via ioctls.
713 */
714 static void
715 ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag)
716 {
717 struct ieee80211vap *vap;
718 int bit;
719
720 IEEE80211_LOCK_ASSERT(ic);
721
722 bit = 0;
723 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
724 if (vap->iv_flags_ht & flag) {
725 bit = 1;
726 break;
727 }
728 if (bit)
729 ic->ic_flags_ht |= flag;
730 else
731 ic->ic_flags_ht &= ~flag;
732 }
733
734 void
735 ieee80211_syncflag_ht(struct ieee80211vap *vap, int flag)
736 {
737 struct ieee80211com *ic = vap->iv_ic;
738
739 IEEE80211_LOCK(ic);
740 if (flag < 0) {
741 flag = -flag;
742 vap->iv_flags_ht &= ~flag;
743 } else
744 vap->iv_flags_ht |= flag;
745 ieee80211_syncflag_ht_locked(ic, flag);
746 IEEE80211_UNLOCK(ic);
747 }
748
749 /*
750 * Synchronize flags_ext bit state in the com structure
751 * according to the state of all vap's. This is used,
752 * for example, to handle state changes via ioctls.
753 */
754 static void
755 ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag)
756 {
757 struct ieee80211vap *vap;
758 int bit;
759
760 IEEE80211_LOCK_ASSERT(ic);
761
762 bit = 0;
763 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
764 if (vap->iv_flags_ext & flag) {
765 bit = 1;
766 break;
767 }
768 if (bit)
769 ic->ic_flags_ext |= flag;
770 else
771 ic->ic_flags_ext &= ~flag;
772 }
773
774 void
775 ieee80211_syncflag_ext(struct ieee80211vap *vap, int flag)
776 {
777 struct ieee80211com *ic = vap->iv_ic;
778
779 IEEE80211_LOCK(ic);
780 if (flag < 0) {
781 flag = -flag;
782 vap->iv_flags_ext &= ~flag;
783 } else
784 vap->iv_flags_ext |= flag;
785 ieee80211_syncflag_ext_locked(ic, flag);
786 IEEE80211_UNLOCK(ic);
787 }
788
789 static __inline int
790 mapgsm(u_int freq, u_int flags)
791 {
792 freq *= 10;
793 if (flags & IEEE80211_CHAN_QUARTER)
794 freq += 5;
795 else if (flags & IEEE80211_CHAN_HALF)
796 freq += 10;
797 else
798 freq += 20;
799 /* NB: there is no 907/20 wide but leave room */
800 return (freq - 906*10) / 5;
801 }
802
803 static __inline int
804 mappsb(u_int freq, u_int flags)
805 {
806 return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5;
807 }
808
809 /*
810 * Convert MHz frequency to IEEE channel number.
811 */
812 int
813 ieee80211_mhz2ieee(u_int freq, u_int flags)
814 {
815 #define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990)
816 if (flags & IEEE80211_CHAN_GSM)
817 return mapgsm(freq, flags);
818 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
819 if (freq == 2484)
820 return 14;
821 if (freq < 2484)
822 return ((int) freq - 2407) / 5;
823 else
824 return 15 + ((freq - 2512) / 20);
825 } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */
826 if (freq <= 5000) {
827 /* XXX check regdomain? */
828 if (IS_FREQ_IN_PSB(freq))
829 return mappsb(freq, flags);
830 return (freq - 4000) / 5;
831 } else
832 return (freq - 5000) / 5;
833 } else { /* either, guess */
834 if (freq == 2484)
835 return 14;
836 if (freq < 2484) {
837 if (907 <= freq && freq <= 922)
838 return mapgsm(freq, flags);
839 return ((int) freq - 2407) / 5;
840 }
841 if (freq < 5000) {
842 if (IS_FREQ_IN_PSB(freq))
843 return mappsb(freq, flags);
844 else if (freq > 4900)
845 return (freq - 4000) / 5;
846 else
847 return 15 + ((freq - 2512) / 20);
848 }
849 return (freq - 5000) / 5;
850 }
851 #undef IS_FREQ_IN_PSB
852 }
853
854 /*
855 * Convert channel to IEEE channel number.
856 */
857 int
858 ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c)
859 {
860 if (c == NULL) {
861 if_printf(ic->ic_ifp, "invalid channel (NULL)\n");
862 return 0; /* XXX */
863 }
864 return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee);
865 }
866
867 /*
868 * Convert IEEE channel number to MHz frequency.
869 */
870 u_int
871 ieee80211_ieee2mhz(u_int chan, u_int flags)
872 {
873 if (flags & IEEE80211_CHAN_GSM)
874 return 907 + 5 * (chan / 10);
875 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
876 if (chan == 14)
877 return 2484;
878 if (chan < 14)
879 return 2407 + chan*5;
880 else
881 return 2512 + ((chan-15)*20);
882 } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */
883 if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) {
884 chan -= 37;
885 return 4940 + chan*5 + (chan % 5 ? 2 : 0);
886 }
887 return 5000 + (chan*5);
888 } else { /* either, guess */
889 /* XXX can't distinguish PSB+GSM channels */
890 if (chan == 14)
891 return 2484;
892 if (chan < 14) /* 0-13 */
893 return 2407 + chan*5;
894 if (chan < 27) /* 15-26 */
895 return 2512 + ((chan-15)*20);
896 return 5000 + (chan*5);
897 }
898 }
899
900 /*
901 * Locate a channel given a frequency+flags. We cache
902 * the previous lookup to optimize switching between two
903 * channels--as happens with dynamic turbo.
904 */
905 struct ieee80211_channel *
906 ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags)
907 {
908 struct ieee80211_channel *c;
909 int i;
910
911 flags &= IEEE80211_CHAN_ALLTURBO;
912 c = ic->ic_prevchan;
913 if (c != NULL && c->ic_freq == freq &&
914 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
915 return c;
916 /* brute force search */
917 for (i = 0; i < ic->ic_nchans; i++) {
918 c = &ic->ic_channels[i];
919 if (c->ic_freq == freq &&
920 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
921 return c;
922 }
923 return NULL;
924 }
925
926 /*
927 * Locate a channel given a channel number+flags. We cache
928 * the previous lookup to optimize switching between two
929 * channels--as happens with dynamic turbo.
930 */
931 struct ieee80211_channel *
932 ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags)
933 {
934 struct ieee80211_channel *c;
935 int i;
936
937 flags &= IEEE80211_CHAN_ALLTURBO;
938 c = ic->ic_prevchan;
939 if (c != NULL && c->ic_ieee == ieee &&
940 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
941 return c;
942 /* brute force search */
943 for (i = 0; i < ic->ic_nchans; i++) {
944 c = &ic->ic_channels[i];
945 if (c->ic_ieee == ieee &&
946 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
947 return c;
948 }
949 return NULL;
950 }
951
952 static void
953 addmedia(struct ifmedia *media, int caps, int addsta, int mode, int mword)
954 {
955 #define ADD(_ic, _s, _o) \
956 ifmedia_add(media, \
957 IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL)
958 static const u_int mopts[IEEE80211_MODE_MAX] = {
959 [IEEE80211_MODE_AUTO] = IFM_AUTO,
960 [IEEE80211_MODE_11A] = IFM_IEEE80211_11A,
961 [IEEE80211_MODE_11B] = IFM_IEEE80211_11B,
962 [IEEE80211_MODE_11G] = IFM_IEEE80211_11G,
963 [IEEE80211_MODE_FH] = IFM_IEEE80211_FH,
964 [IEEE80211_MODE_TURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO,
965 [IEEE80211_MODE_TURBO_G] = IFM_IEEE80211_11G|IFM_IEEE80211_TURBO,
966 [IEEE80211_MODE_STURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO,
967 [IEEE80211_MODE_HALF] = IFM_IEEE80211_11A, /* XXX */
968 [IEEE80211_MODE_QUARTER] = IFM_IEEE80211_11A, /* XXX */
969 [IEEE80211_MODE_11NA] = IFM_IEEE80211_11NA,
970 [IEEE80211_MODE_11NG] = IFM_IEEE80211_11NG,
971 };
972 u_int mopt;
973
974 mopt = mopts[mode];
975 if (addsta)
976 ADD(ic, mword, mopt); /* STA mode has no cap */
977 if (caps & IEEE80211_C_IBSS)
978 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC);
979 if (caps & IEEE80211_C_HOSTAP)
980 ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP);
981 if (caps & IEEE80211_C_AHDEMO)
982 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0);
983 if (caps & IEEE80211_C_MONITOR)
984 ADD(media, mword, mopt | IFM_IEEE80211_MONITOR);
985 if (caps & IEEE80211_C_WDS)
986 ADD(media, mword, mopt | IFM_IEEE80211_WDS);
987 if (caps & IEEE80211_C_MBSS)
988 ADD(media, mword, mopt | IFM_IEEE80211_MBSS);
989 #undef ADD
990 }
991
992 /*
993 * Setup the media data structures according to the channel and
994 * rate tables.
995 */
996 static int
997 ieee80211_media_setup(struct ieee80211com *ic,
998 struct ifmedia *media, int caps, int addsta,
999 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat)
1000 {
1001 int i, j, mode, rate, maxrate, mword, r;
1002 const struct ieee80211_rateset *rs;
1003 struct ieee80211_rateset allrates;
1004
1005 /*
1006 * Fill in media characteristics.
1007 */
1008 ifmedia_init(media, 0, media_change, media_stat);
1009 maxrate = 0;
1010 /*
1011 * Add media for legacy operating modes.
1012 */
1013 memset(&allrates, 0, sizeof(allrates));
1014 for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) {
1015 if (isclr(ic->ic_modecaps, mode))
1016 continue;
1017 addmedia(media, caps, addsta, mode, IFM_AUTO);
1018 if (mode == IEEE80211_MODE_AUTO)
1019 continue;
1020 rs = &ic->ic_sup_rates[mode];
1021 for (i = 0; i < rs->rs_nrates; i++) {
1022 rate = rs->rs_rates[i];
1023 mword = ieee80211_rate2media(ic, rate, mode);
1024 if (mword == 0)
1025 continue;
1026 addmedia(media, caps, addsta, mode, mword);
1027 /*
1028 * Add legacy rate to the collection of all rates.
1029 */
1030 r = rate & IEEE80211_RATE_VAL;
1031 for (j = 0; j < allrates.rs_nrates; j++)
1032 if (allrates.rs_rates[j] == r)
1033 break;
1034 if (j == allrates.rs_nrates) {
1035 /* unique, add to the set */
1036 allrates.rs_rates[j] = r;
1037 allrates.rs_nrates++;
1038 }
1039 rate = (rate & IEEE80211_RATE_VAL) / 2;
1040 if (rate > maxrate)
1041 maxrate = rate;
1042 }
1043 }
1044 for (i = 0; i < allrates.rs_nrates; i++) {
1045 mword = ieee80211_rate2media(ic, allrates.rs_rates[i],
1046 IEEE80211_MODE_AUTO);
1047 if (mword == 0)
1048 continue;
1049 /* NB: remove media options from mword */
1050 addmedia(media, caps, addsta,
1051 IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword));
1052 }
1053 /*
1054 * Add HT/11n media. Note that we do not have enough
1055 * bits in the media subtype to express the MCS so we
1056 * use a "placeholder" media subtype and any fixed MCS
1057 * must be specified with a different mechanism.
1058 */
1059 for (; mode <= IEEE80211_MODE_11NG; mode++) {
1060 if (isclr(ic->ic_modecaps, mode))
1061 continue;
1062 addmedia(media, caps, addsta, mode, IFM_AUTO);
1063 addmedia(media, caps, addsta, mode, IFM_IEEE80211_MCS);
1064 }
1065 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) ||
1066 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) {
1067 addmedia(media, caps, addsta,
1068 IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS);
1069 /* XXX could walk htrates */
1070 /* XXX known array size */
1071 if (ieee80211_htrates[15].ht40_rate_400ns > maxrate)
1072 maxrate = ieee80211_htrates[15].ht40_rate_400ns;
1073 }
1074 return maxrate;
1075 }
1076
1077 void
1078 ieee80211_media_init(struct ieee80211com *ic)
1079 {
1080 struct ifnet *ifp = ic->ic_ifp;
1081 int maxrate;
1082
1083 /* NB: this works because the structure is initialized to zero */
1084 if (!LIST_EMPTY(&ic->ic_media.ifm_list)) {
1085 /*
1086 * We are re-initializing the channel list; clear
1087 * the existing media state as the media routines
1088 * don't suppress duplicates.
1089 */
1090 ifmedia_removeall(&ic->ic_media);
1091 }
1092 ieee80211_chan_init(ic);
1093
1094 /*
1095 * Recalculate media settings in case new channel list changes
1096 * the set of available modes.
1097 */
1098 maxrate = ieee80211_media_setup(ic, &ic->ic_media, ic->ic_caps, 1,
1099 ieee80211com_media_change, ieee80211com_media_status);
1100 /* NB: strip explicit mode; we're actually in autoselect */
1101 ifmedia_set(&ic->ic_media,
1102 media_status(ic->ic_opmode, ic->ic_curchan) &~
1103 (IFM_MMASK | IFM_IEEE80211_TURBO));
1104 if (maxrate)
1105 ifp->if_baudrate = IF_Mbps(maxrate);
1106
1107 /* XXX need to propagate new media settings to vap's */
1108 }
1109
1110 /* XXX inline or eliminate? */
1111 const struct ieee80211_rateset *
1112 ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c)
1113 {
1114 /* XXX does this work for 11ng basic rates? */
1115 return &ic->ic_sup_rates[ieee80211_chan2mode(c)];
1116 }
1117
1118 void
1119 ieee80211_announce(struct ieee80211com *ic)
1120 {
1121 struct ifnet *ifp = ic->ic_ifp;
1122 int i, mode, rate, mword;
1123 const struct ieee80211_rateset *rs;
1124
1125 /* NB: skip AUTO since it has no rates */
1126 for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) {
1127 if (isclr(ic->ic_modecaps, mode))
1128 continue;
1129 if_printf(ifp, "%s rates: ", ieee80211_phymode_name[mode]);
1130 rs = &ic->ic_sup_rates[mode];
1131 for (i = 0; i < rs->rs_nrates; i++) {
1132 mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode);
1133 if (mword == 0)
1134 continue;
1135 rate = ieee80211_media2rate(mword);
1136 printf("%s%d%sMbps", (i != 0 ? " " : ""),
1137 rate / 2, ((rate & 0x1) != 0 ? ".5" : ""));
1138 }
1139 printf("\n");
1140 }
1141 ieee80211_ht_announce(ic);
1142 }
1143
1144 void
1145 ieee80211_announce_channels(struct ieee80211com *ic)
1146 {
1147 const struct ieee80211_channel *c;
1148 char type;
1149 int i, cw;
1150
1151 printf("Chan Freq CW RegPwr MinPwr MaxPwr\n");
1152 for (i = 0; i < ic->ic_nchans; i++) {
1153 c = &ic->ic_channels[i];
1154 if (IEEE80211_IS_CHAN_ST(c))
1155 type = 'S';
1156 else if (IEEE80211_IS_CHAN_108A(c))
1157 type = 'T';
1158 else if (IEEE80211_IS_CHAN_108G(c))
1159 type = 'G';
1160 else if (IEEE80211_IS_CHAN_HT(c))
1161 type = 'n';
1162 else if (IEEE80211_IS_CHAN_A(c))
1163 type = 'a';
1164 else if (IEEE80211_IS_CHAN_ANYG(c))
1165 type = 'g';
1166 else if (IEEE80211_IS_CHAN_B(c))
1167 type = 'b';
1168 else
1169 type = 'f';
1170 if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c))
1171 cw = 40;
1172 else if (IEEE80211_IS_CHAN_HALF(c))
1173 cw = 10;
1174 else if (IEEE80211_IS_CHAN_QUARTER(c))
1175 cw = 5;
1176 else
1177 cw = 20;
1178 printf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n"
1179 , c->ic_ieee, c->ic_freq, type
1180 , cw
1181 , IEEE80211_IS_CHAN_HT40U(c) ? '+' :
1182 IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' '
1183 , c->ic_maxregpower
1184 , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0
1185 , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0
1186 );
1187 }
1188 }
1189
1190 static int
1191 media2mode(const struct ifmedia_entry *ime, uint32_t flags, uint16_t *mode)
1192 {
1193 switch (IFM_MODE(ime->ifm_media)) {
1194 case IFM_IEEE80211_11A:
1195 *mode = IEEE80211_MODE_11A;
1196 break;
1197 case IFM_IEEE80211_11B:
1198 *mode = IEEE80211_MODE_11B;
1199 break;
1200 case IFM_IEEE80211_11G:
1201 *mode = IEEE80211_MODE_11G;
1202 break;
1203 case IFM_IEEE80211_FH:
1204 *mode = IEEE80211_MODE_FH;
1205 break;
1206 case IFM_IEEE80211_11NA:
1207 *mode = IEEE80211_MODE_11NA;
1208 break;
1209 case IFM_IEEE80211_11NG:
1210 *mode = IEEE80211_MODE_11NG;
1211 break;
1212 case IFM_AUTO:
1213 *mode = IEEE80211_MODE_AUTO;
1214 break;
1215 default:
1216 return 0;
1217 }
1218 /*
1219 * Turbo mode is an ``option''.
1220 * XXX does not apply to AUTO
1221 */
1222 if (ime->ifm_media & IFM_IEEE80211_TURBO) {
1223 if (*mode == IEEE80211_MODE_11A) {
1224 if (flags & IEEE80211_F_TURBOP)
1225 *mode = IEEE80211_MODE_TURBO_A;
1226 else
1227 *mode = IEEE80211_MODE_STURBO_A;
1228 } else if (*mode == IEEE80211_MODE_11G)
1229 *mode = IEEE80211_MODE_TURBO_G;
1230 else
1231 return 0;
1232 }
1233 /* XXX HT40 +/- */
1234 return 1;
1235 }
1236
1237 /*
1238 * Handle a media change request on the underlying interface.
1239 */
1240 int
1241 ieee80211com_media_change(struct ifnet *ifp)
1242 {
1243 return EINVAL;
1244 }
1245
1246 /*
1247 * Handle a media change request on the vap interface.
1248 */
1249 int
1250 ieee80211_media_change(struct ifnet *ifp)
1251 {
1252 struct ieee80211vap *vap = ifp->if_softc;
1253 struct ifmedia_entry *ime = vap->iv_media.ifm_cur;
1254 uint16_t newmode;
1255
1256 if (!media2mode(ime, vap->iv_flags, &newmode))
1257 return EINVAL;
1258 if (vap->iv_des_mode != newmode) {
1259 vap->iv_des_mode = newmode;
1260 /* XXX kick state machine if up+running */
1261 }
1262 return 0;
1263 }
1264
1265 /*
1266 * Common code to calculate the media status word
1267 * from the operating mode and channel state.
1268 */
1269 static int
1270 media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan)
1271 {
1272 int status;
1273
1274 status = IFM_IEEE80211;
1275 switch (opmode) {
1276 case IEEE80211_M_STA:
1277 break;
1278 case IEEE80211_M_IBSS:
1279 status |= IFM_IEEE80211_ADHOC;
1280 break;
1281 case IEEE80211_M_HOSTAP:
1282 status |= IFM_IEEE80211_HOSTAP;
1283 break;
1284 case IEEE80211_M_MONITOR:
1285 status |= IFM_IEEE80211_MONITOR;
1286 break;
1287 case IEEE80211_M_AHDEMO:
1288 status |= IFM_IEEE80211_ADHOC | IFM_FLAG0;
1289 break;
1290 case IEEE80211_M_WDS:
1291 status |= IFM_IEEE80211_WDS;
1292 break;
1293 case IEEE80211_M_MBSS:
1294 status |= IFM_IEEE80211_MBSS;
1295 break;
1296 }
1297 if (IEEE80211_IS_CHAN_HTA(chan)) {
1298 status |= IFM_IEEE80211_11NA;
1299 } else if (IEEE80211_IS_CHAN_HTG(chan)) {
1300 status |= IFM_IEEE80211_11NG;
1301 } else if (IEEE80211_IS_CHAN_A(chan)) {
1302 status |= IFM_IEEE80211_11A;
1303 } else if (IEEE80211_IS_CHAN_B(chan)) {
1304 status |= IFM_IEEE80211_11B;
1305 } else if (IEEE80211_IS_CHAN_ANYG(chan)) {
1306 status |= IFM_IEEE80211_11G;
1307 } else if (IEEE80211_IS_CHAN_FHSS(chan)) {
1308 status |= IFM_IEEE80211_FH;
1309 }
1310 /* XXX else complain? */
1311
1312 if (IEEE80211_IS_CHAN_TURBO(chan))
1313 status |= IFM_IEEE80211_TURBO;
1314 #if 0
1315 if (IEEE80211_IS_CHAN_HT20(chan))
1316 status |= IFM_IEEE80211_HT20;
1317 if (IEEE80211_IS_CHAN_HT40(chan))
1318 status |= IFM_IEEE80211_HT40;
1319 #endif
1320 return status;
1321 }
1322
1323 static void
1324 ieee80211com_media_status(struct ifnet *ifp, struct ifmediareq *imr)
1325 {
1326 struct ieee80211com *ic = ifp->if_l2com;
1327 struct ieee80211vap *vap;
1328
1329 imr->ifm_status = IFM_AVALID;
1330 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
1331 if (vap->iv_ifp->if_flags & IFF_UP) {
1332 imr->ifm_status |= IFM_ACTIVE;
1333 break;
1334 }
1335 imr->ifm_active = media_status(ic->ic_opmode, ic->ic_curchan);
1336 if (imr->ifm_status & IFM_ACTIVE)
1337 imr->ifm_current = imr->ifm_active;
1338 }
1339
1340 void
1341 ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr)
1342 {
1343 struct ieee80211vap *vap = ifp->if_softc;
1344 struct ieee80211com *ic = vap->iv_ic;
1345 enum ieee80211_phymode mode;
1346
1347 imr->ifm_status = IFM_AVALID;
1348 /*
1349 * NB: use the current channel's mode to lock down a xmit
1350 * rate only when running; otherwise we may have a mismatch
1351 * in which case the rate will not be convertible.
1352 */
1353 if (vap->iv_state == IEEE80211_S_RUN) {
1354 imr->ifm_status |= IFM_ACTIVE;
1355 mode = ieee80211_chan2mode(ic->ic_curchan);
1356 } else
1357 mode = IEEE80211_MODE_AUTO;
1358 imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan);
1359 /*
1360 * Calculate a current rate if possible.
1361 */
1362 if (vap->iv_txparms[mode].ucastrate != IEEE80211_FIXED_RATE_NONE) {
1363 /*
1364 * A fixed rate is set, report that.
1365 */
1366 imr->ifm_active |= ieee80211_rate2media(ic,
1367 vap->iv_txparms[mode].ucastrate, mode);
1368 } else if (vap->iv_opmode == IEEE80211_M_STA) {
1369 /*
1370 * In station mode report the current transmit rate.
1371 */
1372 imr->ifm_active |= ieee80211_rate2media(ic,
1373 vap->iv_bss->ni_txrate, mode);
1374 } else
1375 imr->ifm_active |= IFM_AUTO;
1376 if (imr->ifm_status & IFM_ACTIVE)
1377 imr->ifm_current = imr->ifm_active;
1378 }
1379
1380 /*
1381 * Set the current phy mode and recalculate the active channel
1382 * set based on the available channels for this mode. Also
1383 * select a new default/current channel if the current one is
1384 * inappropriate for this mode.
1385 */
1386 int
1387 ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode)
1388 {
1389 /*
1390 * Adjust basic rates in 11b/11g supported rate set.
1391 * Note that if operating on a hal/quarter rate channel
1392 * this is a noop as those rates sets are different
1393 * and used instead.
1394 */
1395 if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B)
1396 ieee80211_setbasicrates(&ic->ic_sup_rates[mode], mode);
1397
1398 ic->ic_curmode = mode;
1399 ieee80211_reset_erp(ic); /* reset ERP state */
1400
1401 return 0;
1402 }
1403
1404 /*
1405 * Return the phy mode for with the specified channel.
1406 */
1407 enum ieee80211_phymode
1408 ieee80211_chan2mode(const struct ieee80211_channel *chan)
1409 {
1410
1411 if (IEEE80211_IS_CHAN_HTA(chan))
1412 return IEEE80211_MODE_11NA;
1413 else if (IEEE80211_IS_CHAN_HTG(chan))
1414 return IEEE80211_MODE_11NG;
1415 else if (IEEE80211_IS_CHAN_108G(chan))
1416 return IEEE80211_MODE_TURBO_G;
1417 else if (IEEE80211_IS_CHAN_ST(chan))
1418 return IEEE80211_MODE_STURBO_A;
1419 else if (IEEE80211_IS_CHAN_TURBO(chan))
1420 return IEEE80211_MODE_TURBO_A;
1421 else if (IEEE80211_IS_CHAN_HALF(chan))
1422 return IEEE80211_MODE_HALF;
1423 else if (IEEE80211_IS_CHAN_QUARTER(chan))
1424 return IEEE80211_MODE_QUARTER;
1425 else if (IEEE80211_IS_CHAN_A(chan))
1426 return IEEE80211_MODE_11A;
1427 else if (IEEE80211_IS_CHAN_ANYG(chan))
1428 return IEEE80211_MODE_11G;
1429 else if (IEEE80211_IS_CHAN_B(chan))
1430 return IEEE80211_MODE_11B;
1431 else if (IEEE80211_IS_CHAN_FHSS(chan))
1432 return IEEE80211_MODE_FH;
1433
1434 /* NB: should not get here */
1435 printf("%s: cannot map channel to mode; freq %u flags 0x%x\n",
1436 __func__, chan->ic_freq, chan->ic_flags);
1437 return IEEE80211_MODE_11B;
1438 }
1439
1440 struct ratemedia {
1441 u_int match; /* rate + mode */
1442 u_int media; /* if_media rate */
1443 };
1444
1445 static int
1446 findmedia(const struct ratemedia rates[], int n, u_int match)
1447 {
1448 int i;
1449
1450 for (i = 0; i < n; i++)
1451 if (rates[i].match == match)
1452 return rates[i].media;
1453 return IFM_AUTO;
1454 }
1455
1456 /*
1457 * Convert IEEE80211 rate value to ifmedia subtype.
1458 * Rate is either a legacy rate in units of 0.5Mbps
1459 * or an MCS index.
1460 */
1461 int
1462 ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode)
1463 {
1464 #define N(a) (sizeof(a) / sizeof(a[0]))
1465 static const struct ratemedia rates[] = {
1466 { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 },
1467 { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 },
1468 { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 },
1469 { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 },
1470 { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 },
1471 { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 },
1472 { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 },
1473 { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 },
1474 { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 },
1475 { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 },
1476 { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 },
1477 { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 },
1478 { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 },
1479 { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 },
1480 { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 },
1481 { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 },
1482 { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 },
1483 { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 },
1484 { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 },
1485 { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 },
1486 { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 },
1487 { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 },
1488 { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 },
1489 { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 },
1490 { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 },
1491 { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 },
1492 { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 },
1493 { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 },
1494 { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 },
1495 { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 },
1496 /* NB: OFDM72 doesn't realy exist so we don't handle it */
1497 };
1498 static const struct ratemedia htrates[] = {
1499 { 0, IFM_IEEE80211_MCS },
1500 { 1, IFM_IEEE80211_MCS },
1501 { 2, IFM_IEEE80211_MCS },
1502 { 3, IFM_IEEE80211_MCS },
1503 { 4, IFM_IEEE80211_MCS },
1504 { 5, IFM_IEEE80211_MCS },
1505 { 6, IFM_IEEE80211_MCS },
1506 { 7, IFM_IEEE80211_MCS },
1507 { 8, IFM_IEEE80211_MCS },
1508 { 9, IFM_IEEE80211_MCS },
1509 { 10, IFM_IEEE80211_MCS },
1510 { 11, IFM_IEEE80211_MCS },
1511 { 12, IFM_IEEE80211_MCS },
1512 { 13, IFM_IEEE80211_MCS },
1513 { 14, IFM_IEEE80211_MCS },
1514 { 15, IFM_IEEE80211_MCS },
1515 };
1516 int m;
1517
1518 /*
1519 * Check 11n rates first for match as an MCS.
1520 */
1521 if (mode == IEEE80211_MODE_11NA) {
1522 if (rate & IEEE80211_RATE_MCS) {
1523 rate &= ~IEEE80211_RATE_MCS;
1524 m = findmedia(htrates, N(htrates), rate);
1525 if (m != IFM_AUTO)
1526 return m | IFM_IEEE80211_11NA;
1527 }
1528 } else if (mode == IEEE80211_MODE_11NG) {
1529 /* NB: 12 is ambiguous, it will be treated as an MCS */
1530 if (rate & IEEE80211_RATE_MCS) {
1531 rate &= ~IEEE80211_RATE_MCS;
1532 m = findmedia(htrates, N(htrates), rate);
1533 if (m != IFM_AUTO)
1534 return m | IFM_IEEE80211_11NG;
1535 }
1536 }
1537 rate &= IEEE80211_RATE_VAL;
1538 switch (mode) {
1539 case IEEE80211_MODE_11A:
1540 case IEEE80211_MODE_HALF: /* XXX good 'nuf */
1541 case IEEE80211_MODE_QUARTER:
1542 case IEEE80211_MODE_11NA:
1543 case IEEE80211_MODE_TURBO_A:
1544 case IEEE80211_MODE_STURBO_A:
1545 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11A);
1546 case IEEE80211_MODE_11B:
1547 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11B);
1548 case IEEE80211_MODE_FH:
1549 return findmedia(rates, N(rates), rate | IFM_IEEE80211_FH);
1550 case IEEE80211_MODE_AUTO:
1551 /* NB: ic may be NULL for some drivers */
1552 if (ic != NULL && ic->ic_phytype == IEEE80211_T_FH)
1553 return findmedia(rates, N(rates),
1554 rate | IFM_IEEE80211_FH);
1555 /* NB: hack, 11g matches both 11b+11a rates */
1556 /* fall thru... */
1557 case IEEE80211_MODE_11G:
1558 case IEEE80211_MODE_11NG:
1559 case IEEE80211_MODE_TURBO_G:
1560 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11G);
1561 }
1562 return IFM_AUTO;
1563 #undef N
1564 }
1565
1566 int
1567 ieee80211_media2rate(int mword)
1568 {
1569 #define N(a) (sizeof(a) / sizeof(a[0]))
1570 static const int ieeerates[] = {
1571 -1, /* IFM_AUTO */
1572 0, /* IFM_MANUAL */
1573 0, /* IFM_NONE */
1574 2, /* IFM_IEEE80211_FH1 */
1575 4, /* IFM_IEEE80211_FH2 */
1576 2, /* IFM_IEEE80211_DS1 */
1577 4, /* IFM_IEEE80211_DS2 */
1578 11, /* IFM_IEEE80211_DS5 */
1579 22, /* IFM_IEEE80211_DS11 */
1580 44, /* IFM_IEEE80211_DS22 */
1581 12, /* IFM_IEEE80211_OFDM6 */
1582 18, /* IFM_IEEE80211_OFDM9 */
1583 24, /* IFM_IEEE80211_OFDM12 */
1584 36, /* IFM_IEEE80211_OFDM18 */
1585 48, /* IFM_IEEE80211_OFDM24 */
1586 72, /* IFM_IEEE80211_OFDM36 */
1587 96, /* IFM_IEEE80211_OFDM48 */
1588 108, /* IFM_IEEE80211_OFDM54 */
1589 144, /* IFM_IEEE80211_OFDM72 */
1590 0, /* IFM_IEEE80211_DS354k */
1591 0, /* IFM_IEEE80211_DS512k */
1592 6, /* IFM_IEEE80211_OFDM3 */
1593 9, /* IFM_IEEE80211_OFDM4 */
1594 54, /* IFM_IEEE80211_OFDM27 */
1595 -1, /* IFM_IEEE80211_MCS */
1596 };
1597 return IFM_SUBTYPE(mword) < N(ieeerates) ?
1598 ieeerates[IFM_SUBTYPE(mword)] : 0;
1599 #undef N
1600 }
1601
1602 /*
1603 * The following hash function is adapted from "Hash Functions" by Bob Jenkins
1604 * ("Algorithm Alley", Dr. Dobbs Journal, September 1997).
1605 */
1606 #define mix(a, b, c) \
1607 do { \
1608 a -= b; a -= c; a ^= (c >> 13); \
1609 b -= c; b -= a; b ^= (a << 8); \
1610 c -= a; c -= b; c ^= (b >> 13); \
1611 a -= b; a -= c; a ^= (c >> 12); \
1612 b -= c; b -= a; b ^= (a << 16); \
1613 c -= a; c -= b; c ^= (b >> 5); \
1614 a -= b; a -= c; a ^= (c >> 3); \
1615 b -= c; b -= a; b ^= (a << 10); \
1616 c -= a; c -= b; c ^= (b >> 15); \
1617 } while (/*CONSTCOND*/0)
1618
1619 uint32_t
1620 ieee80211_mac_hash(const struct ieee80211com *ic,
1621 const uint8_t addr[IEEE80211_ADDR_LEN])
1622 {
1623 uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = ic->ic_hash_key;
1624
1625 b += addr[5] << 8;
1626 b += addr[4];
1627 a += addr[3] << 24;
1628 a += addr[2] << 16;
1629 a += addr[1] << 8;
1630 a += addr[0];
1631
1632 mix(a, b, c);
1633
1634 return c;
1635 }
1636 #undef mix
Cache object: 4ae17badaa34464799b8630549d56782
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