1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #include <sys/cdefs.h>
29 /*
30 * IEEE 802.11 scanning support.
31 */
32 #include "opt_wlan.h"
33
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/proc.h>
37 #include <sys/kernel.h>
38 #include <sys/malloc.h>
39 #include <sys/condvar.h>
40
41 #include <sys/socket.h>
42
43 #include <net/if.h>
44 #include <net/if_var.h>
45 #include <net/if_media.h>
46 #include <net/ethernet.h>
47
48 #include <net80211/ieee80211_var.h>
49
50 /* XXX until it's implemented as attach ops */
51 #include <net80211/ieee80211_scan_sw.h>
52
53 #include <net/bpf.h>
54
55 /*
56 * Roaming-related defaults. RSSI thresholds are as returned by the
57 * driver (.5dBm). Transmit rate thresholds are IEEE rate codes (i.e
58 * .5M units) or MCS.
59 */
60 /* rssi thresholds */
61 #define ROAM_RSSI_11A_DEFAULT 14 /* 11a bss */
62 #define ROAM_RSSI_11B_DEFAULT 14 /* 11b bss */
63 #define ROAM_RSSI_11BONLY_DEFAULT 14 /* 11b-only bss */
64 /* transmit rate thresholds */
65 #define ROAM_RATE_11A_DEFAULT 2*12 /* 11a bss */
66 #define ROAM_RATE_11B_DEFAULT 2*5 /* 11b bss */
67 #define ROAM_RATE_11BONLY_DEFAULT 2*1 /* 11b-only bss */
68 #define ROAM_RATE_HALF_DEFAULT 2*6 /* half-width 11a/g bss */
69 #define ROAM_RATE_QUARTER_DEFAULT 2*3 /* quarter-width 11a/g bss */
70 #define ROAM_MCS_11N_DEFAULT (1 | IEEE80211_RATE_MCS) /* 11n bss */
71 #define ROAM_MCS_11AC_DEFAULT (1 | IEEE80211_RATE_MCS) /* 11ac bss; XXX not used yet */
72
73 void
ieee80211_scan_attach(struct ieee80211com * ic)74 ieee80211_scan_attach(struct ieee80211com *ic)
75 {
76 /*
77 * If there's no scan method pointer, attach the
78 * swscan set as a default.
79 */
80 if (ic->ic_scan_methods == NULL)
81 ieee80211_swscan_attach(ic);
82 else
83 ic->ic_scan_methods->sc_attach(ic);
84 }
85
86 void
ieee80211_scan_detach(struct ieee80211com * ic)87 ieee80211_scan_detach(struct ieee80211com *ic)
88 {
89
90 /*
91 * Ideally we'd do the ss_ops detach call here;
92 * but then sc_detach() would need to be split in two.
93 *
94 * I'll do that later.
95 */
96 ic->ic_scan_methods->sc_detach(ic);
97 }
98
99 static const struct ieee80211_roamparam defroam[IEEE80211_MODE_MAX] = {
100 [IEEE80211_MODE_11A] = { .rssi = ROAM_RSSI_11A_DEFAULT,
101 .rate = ROAM_RATE_11A_DEFAULT },
102 [IEEE80211_MODE_11G] = { .rssi = ROAM_RSSI_11B_DEFAULT,
103 .rate = ROAM_RATE_11B_DEFAULT },
104 [IEEE80211_MODE_11B] = { .rssi = ROAM_RSSI_11BONLY_DEFAULT,
105 .rate = ROAM_RATE_11BONLY_DEFAULT },
106 [IEEE80211_MODE_TURBO_A]= { .rssi = ROAM_RSSI_11A_DEFAULT,
107 .rate = ROAM_RATE_11A_DEFAULT },
108 [IEEE80211_MODE_TURBO_G]= { .rssi = ROAM_RSSI_11A_DEFAULT,
109 .rate = ROAM_RATE_11A_DEFAULT },
110 [IEEE80211_MODE_STURBO_A]={ .rssi = ROAM_RSSI_11A_DEFAULT,
111 .rate = ROAM_RATE_11A_DEFAULT },
112 [IEEE80211_MODE_HALF] = { .rssi = ROAM_RSSI_11A_DEFAULT,
113 .rate = ROAM_RATE_HALF_DEFAULT },
114 [IEEE80211_MODE_QUARTER]= { .rssi = ROAM_RSSI_11A_DEFAULT,
115 .rate = ROAM_RATE_QUARTER_DEFAULT },
116 [IEEE80211_MODE_11NA] = { .rssi = ROAM_RSSI_11A_DEFAULT,
117 .rate = ROAM_MCS_11N_DEFAULT },
118 [IEEE80211_MODE_11NG] = { .rssi = ROAM_RSSI_11B_DEFAULT,
119 .rate = ROAM_MCS_11N_DEFAULT },
120 [IEEE80211_MODE_VHT_2GHZ] = { .rssi = ROAM_RSSI_11B_DEFAULT,
121 .rate = ROAM_MCS_11AC_DEFAULT },
122 [IEEE80211_MODE_VHT_5GHZ] = { .rssi = ROAM_RSSI_11A_DEFAULT,
123 .rate = ROAM_MCS_11AC_DEFAULT },
124
125 };
126
127 void
ieee80211_scan_vattach(struct ieee80211vap * vap)128 ieee80211_scan_vattach(struct ieee80211vap *vap)
129 {
130 struct ieee80211com *ic = vap->iv_ic;
131 int m;
132
133 vap->iv_bgscanidle = (IEEE80211_BGSCAN_IDLE_DEFAULT*1000)/hz;
134 vap->iv_bgscanintvl = IEEE80211_BGSCAN_INTVAL_DEFAULT*hz;
135 vap->iv_scanvalid = IEEE80211_SCAN_VALID_DEFAULT*hz;
136
137 vap->iv_roaming = IEEE80211_ROAMING_AUTO;
138
139 memset(vap->iv_roamparms, 0, sizeof(vap->iv_roamparms));
140 for (m = IEEE80211_MODE_AUTO + 1; m < IEEE80211_MODE_MAX; m++) {
141 if (isclr(ic->ic_modecaps, m))
142 continue;
143
144 memcpy(&vap->iv_roamparms[m], &defroam[m], sizeof(defroam[m]));
145 }
146
147 ic->ic_scan_methods->sc_vattach(vap);
148 }
149
150 void
ieee80211_scan_vdetach(struct ieee80211vap * vap)151 ieee80211_scan_vdetach(struct ieee80211vap *vap)
152 {
153 struct ieee80211com *ic = vap->iv_ic;
154 struct ieee80211_scan_state *ss;
155
156 IEEE80211_LOCK(ic);
157 ss = ic->ic_scan;
158
159 ic->ic_scan_methods->sc_vdetach(vap);
160
161 if (ss != NULL && ss->ss_vap == vap) {
162 if (ss->ss_ops != NULL) {
163 ss->ss_ops->scan_detach(ss);
164 ss->ss_ops = NULL;
165 }
166 ss->ss_vap = NULL;
167 }
168 IEEE80211_UNLOCK(ic);
169 }
170
171 /*
172 * Simple-minded scanner module support.
173 */
174 static const char *scan_modnames[IEEE80211_OPMODE_MAX] = {
175 "wlan_scan_sta", /* IEEE80211_M_IBSS */
176 "wlan_scan_sta", /* IEEE80211_M_STA */
177 "wlan_scan_wds", /* IEEE80211_M_WDS */
178 "wlan_scan_sta", /* IEEE80211_M_AHDEMO */
179 "wlan_scan_ap", /* IEEE80211_M_HOSTAP */
180 "wlan_scan_monitor", /* IEEE80211_M_MONITOR */
181 "wlan_scan_sta", /* IEEE80211_M_MBSS */
182 };
183 static const struct ieee80211_scanner *scanners[IEEE80211_OPMODE_MAX];
184
185 const struct ieee80211_scanner *
ieee80211_scanner_get(enum ieee80211_opmode mode)186 ieee80211_scanner_get(enum ieee80211_opmode mode)
187 {
188 if (mode >= IEEE80211_OPMODE_MAX)
189 return NULL;
190 if (scanners[mode] == NULL)
191 ieee80211_load_module(scan_modnames[mode]);
192 return scanners[mode];
193 }
194
195 void
ieee80211_scanner_register(enum ieee80211_opmode mode,const struct ieee80211_scanner * scan)196 ieee80211_scanner_register(enum ieee80211_opmode mode,
197 const struct ieee80211_scanner *scan)
198 {
199 if (mode >= IEEE80211_OPMODE_MAX)
200 return;
201 scanners[mode] = scan;
202 }
203
204 void
ieee80211_scanner_unregister(enum ieee80211_opmode mode,const struct ieee80211_scanner * scan)205 ieee80211_scanner_unregister(enum ieee80211_opmode mode,
206 const struct ieee80211_scanner *scan)
207 {
208 if (mode >= IEEE80211_OPMODE_MAX)
209 return;
210 if (scanners[mode] == scan)
211 scanners[mode] = NULL;
212 }
213
214 void
ieee80211_scanner_unregister_all(const struct ieee80211_scanner * scan)215 ieee80211_scanner_unregister_all(const struct ieee80211_scanner *scan)
216 {
217 int m;
218
219 for (m = 0; m < IEEE80211_OPMODE_MAX; m++)
220 if (scanners[m] == scan)
221 scanners[m] = NULL;
222 }
223
224 /*
225 * Update common scanner state to reflect the current
226 * operating mode. This is called when the state machine
227 * is transitioned to RUN state w/o scanning--e.g. when
228 * operating in monitor mode. The purpose of this is to
229 * ensure later callbacks find ss_ops set to properly
230 * reflect current operating mode.
231 */
232 void
ieee80211_scan_update_locked(struct ieee80211vap * vap,const struct ieee80211_scanner * scan)233 ieee80211_scan_update_locked(struct ieee80211vap *vap,
234 const struct ieee80211_scanner *scan)
235 {
236 struct ieee80211com *ic = vap->iv_ic;
237 struct ieee80211_scan_state *ss = ic->ic_scan;
238
239 IEEE80211_LOCK_ASSERT(ic);
240
241 #ifdef IEEE80211_DEBUG
242 if (ss->ss_vap != vap || ss->ss_ops != scan) {
243 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN,
244 "%s: current scanner is <%s:%s>, switch to <%s:%s>\n",
245 __func__,
246 ss->ss_vap != NULL ?
247 ieee80211_get_vap_ifname(ss->ss_vap) : "none",
248 ss->ss_vap != NULL ?
249 ieee80211_opmode_name[ss->ss_vap->iv_opmode] : "none",
250 ieee80211_get_vap_ifname(vap),
251 ieee80211_opmode_name[vap->iv_opmode]);
252 }
253 #endif
254 ss->ss_vap = vap;
255 if (ss->ss_ops != scan) {
256 /*
257 * Switch scanners; detach old, attach new. Special
258 * case where a single scan module implements multiple
259 * policies by using different scan ops but a common
260 * core. We assume if the old and new attach methods
261 * are identical then it's ok to just change ss_ops
262 * and not flush the internal state of the module.
263 */
264 if (scan == NULL || ss->ss_ops == NULL ||
265 ss->ss_ops->scan_attach != scan->scan_attach) {
266 if (ss->ss_ops != NULL)
267 ss->ss_ops->scan_detach(ss);
268 if (scan != NULL && !scan->scan_attach(ss)) {
269 /* XXX attach failure */
270 /* XXX stat+msg */
271 scan = NULL;
272 }
273 }
274 ss->ss_ops = scan;
275 }
276 }
277
278 #ifdef IEEE80211_DEBUG
279 static void
ieee80211_scan_dump_channels(const struct ieee80211_scan_state * ss)280 ieee80211_scan_dump_channels(const struct ieee80211_scan_state *ss)
281 {
282 struct ieee80211com *ic = ss->ss_ic;
283 const char *sep;
284 int i;
285
286 sep = "";
287 for (i = ss->ss_next; i < ss->ss_last; i++) {
288 const struct ieee80211_channel *c = ss->ss_chans[i];
289
290 net80211_printf("%s%u%c", sep, ieee80211_chan2ieee(ic, c),
291 ieee80211_channel_type_char(c));
292 sep = ", ";
293 }
294 }
295
296 void
ieee80211_scan_dump(struct ieee80211_scan_state * ss)297 ieee80211_scan_dump(struct ieee80211_scan_state *ss)
298 {
299 struct ieee80211vap *vap = ss->ss_vap;
300
301 net80211_vap_printf(vap, "scan set ");
302 ieee80211_scan_dump_channels(ss);
303 net80211_vap_printf(vap, " dwell min %ums max %ums\n",
304 ticks_to_msecs(ss->ss_mindwell), ticks_to_msecs(ss->ss_maxdwell));
305 }
306 #endif /* IEEE80211_DEBUG */
307
308 void
ieee80211_scan_copy_ssid(struct ieee80211vap * vap,struct ieee80211_scan_state * ss,int nssid,const struct ieee80211_scan_ssid ssids[])309 ieee80211_scan_copy_ssid(struct ieee80211vap *vap, struct ieee80211_scan_state *ss,
310 int nssid, const struct ieee80211_scan_ssid ssids[])
311 {
312 if (nssid > IEEE80211_SCAN_MAX_SSID) {
313 /* XXX printf */
314 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN,
315 "%s: too many ssid %d, ignoring all of them\n",
316 __func__, nssid);
317 return;
318 }
319 memcpy(ss->ss_ssid, ssids, nssid * sizeof(ssids[0]));
320 ss->ss_nssid = nssid;
321 }
322
323 /*
324 * Start a scan unless one is already going.
325 */
326 int
ieee80211_start_scan(struct ieee80211vap * vap,int flags,u_int duration,u_int mindwell,u_int maxdwell,u_int nssid,const struct ieee80211_scan_ssid ssids[])327 ieee80211_start_scan(struct ieee80211vap *vap, int flags,
328 u_int duration, u_int mindwell, u_int maxdwell,
329 u_int nssid, const struct ieee80211_scan_ssid ssids[])
330 {
331 const struct ieee80211_scanner *scan;
332 struct ieee80211com *ic = vap->iv_ic;
333
334 scan = ieee80211_scanner_get(vap->iv_opmode);
335 if (scan == NULL) {
336 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN,
337 "%s: no scanner support for %s mode\n",
338 __func__, ieee80211_opmode_name[vap->iv_opmode]);
339 /* XXX stat */
340 return 0;
341 }
342
343 return ic->ic_scan_methods->sc_start_scan(scan, vap, flags, duration,
344 mindwell, maxdwell, nssid, ssids);
345 }
346
347 /*
348 * Check the scan cache for an ap/channel to use; if that
349 * fails then kick off a new scan.
350 */
351 int
ieee80211_check_scan(struct ieee80211vap * vap,int flags,u_int duration,u_int mindwell,u_int maxdwell,u_int nssid,const struct ieee80211_scan_ssid ssids[])352 ieee80211_check_scan(struct ieee80211vap *vap, int flags,
353 u_int duration, u_int mindwell, u_int maxdwell,
354 u_int nssid, const struct ieee80211_scan_ssid ssids[])
355 {
356 struct ieee80211com *ic = vap->iv_ic;
357 struct ieee80211_scan_state *ss = ic->ic_scan;
358 const struct ieee80211_scanner *scan;
359 int result;
360
361 scan = ieee80211_scanner_get(vap->iv_opmode);
362 if (scan == NULL) {
363 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN,
364 "%s: no scanner support for %s mode\n",
365 __func__, vap->iv_opmode);
366 /* XXX stat */
367 return 0;
368 }
369
370 /*
371 * Check if there's a list of scan candidates already.
372 * XXX want more than the ap we're currently associated with
373 */
374
375 IEEE80211_LOCK(ic);
376 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN,
377 "%s: %s scan, %s%s%s%s%s\n"
378 , __func__
379 , flags & IEEE80211_SCAN_ACTIVE ? "active" : "passive"
380 , flags & IEEE80211_SCAN_FLUSH ? "flush" : "append"
381 , flags & IEEE80211_SCAN_NOPICK ? ", nopick" : ""
382 , flags & IEEE80211_SCAN_NOJOIN ? ", nojoin" : ""
383 , flags & IEEE80211_SCAN_PICK1ST ? ", pick1st" : ""
384 , flags & IEEE80211_SCAN_ONCE ? ", once" : ""
385 );
386
387 if (ss->ss_ops != scan) {
388 /* XXX re-use cache contents? e.g. adhoc<->sta */
389 flags |= IEEE80211_SCAN_FLUSH;
390 }
391
392 /*
393 * XXX TODO: separate things out a bit better.
394 */
395 ieee80211_scan_update_locked(vap, scan);
396
397 result = ic->ic_scan_methods->sc_check_scan(scan, vap, flags, duration,
398 mindwell, maxdwell, nssid, ssids);
399
400 IEEE80211_UNLOCK(ic);
401
402 return (result);
403 }
404
405 /*
406 * Check the scan cache for an ap/channel to use; if that fails
407 * then kick off a scan using the current settings.
408 */
409 int
ieee80211_check_scan_current(struct ieee80211vap * vap)410 ieee80211_check_scan_current(struct ieee80211vap *vap)
411 {
412 return ieee80211_check_scan(vap,
413 IEEE80211_SCAN_ACTIVE,
414 IEEE80211_SCAN_FOREVER, 0, 0,
415 vap->iv_des_nssid, vap->iv_des_ssid);
416 }
417
418 /*
419 * Restart a previous scan. If the previous scan completed
420 * then we start again using the existing channel list.
421 */
422 int
ieee80211_bg_scan(struct ieee80211vap * vap,int flags)423 ieee80211_bg_scan(struct ieee80211vap *vap, int flags)
424 {
425 struct ieee80211com *ic = vap->iv_ic;
426 const struct ieee80211_scanner *scan;
427
428 // IEEE80211_UNLOCK_ASSERT(sc);
429
430 /*
431 * If the driver has not announced BGSCAN capabilities
432 * or BGSCAN is disabled do not attempt to start a bg_scan.
433 * IEEE80211_F_BGSCAN only gets set if IEEE80211_C_BGSCAN
434 * was set by the driver, so no need to check for both here.
435 */
436 if ((vap->iv_flags & IEEE80211_F_BGSCAN) == 0) {
437 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN,
438 "%s: BGSCAN not enabled; not starting bg_scan\n",
439 __func__);
440 return (0);
441 }
442
443 scan = ieee80211_scanner_get(vap->iv_opmode);
444 if (scan == NULL) {
445 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN,
446 "%s: no scanner support for %s mode\n",
447 __func__, vap->iv_opmode);
448 /* XXX stat */
449 return 0;
450 }
451
452 /*
453 * XXX TODO: pull apart the bgscan logic into whatever
454 * belongs here and whatever belongs in the software
455 * scanner.
456 */
457 return (ic->ic_scan_methods->sc_bg_scan(scan, vap, flags));
458 }
459
460 /*
461 * Cancel any scan currently going on for the specified vap.
462 */
463 void
ieee80211_cancel_scan(struct ieee80211vap * vap)464 ieee80211_cancel_scan(struct ieee80211vap *vap)
465 {
466 struct ieee80211com *ic = vap->iv_ic;
467
468 ic->ic_scan_methods->sc_cancel_scan(vap);
469 }
470
471 /*
472 * Cancel any scan currently going on.
473 *
474 * This is called during normal 802.11 data path to cancel
475 * a scan so a newly arrived normal data packet can be sent.
476 */
477 void
ieee80211_cancel_anyscan(struct ieee80211vap * vap)478 ieee80211_cancel_anyscan(struct ieee80211vap *vap)
479 {
480 struct ieee80211com *ic = vap->iv_ic;
481
482 ic->ic_scan_methods->sc_cancel_anyscan(vap);
483 }
484
485 /*
486 * Manually switch to the next channel in the channel list.
487 * Provided for drivers that manage scanning themselves
488 * (e.g. for firmware-based devices).
489 */
490 void
ieee80211_scan_next(struct ieee80211vap * vap)491 ieee80211_scan_next(struct ieee80211vap *vap)
492 {
493 struct ieee80211com *ic = vap->iv_ic;
494
495 ic->ic_scan_methods->sc_scan_next(vap);
496 }
497
498 /*
499 * Manually stop a scan that is currently running.
500 * Provided for drivers that are not able to scan single channels
501 * (e.g. for firmware-based devices).
502 */
503 void
ieee80211_scan_done(struct ieee80211vap * vap)504 ieee80211_scan_done(struct ieee80211vap *vap)
505 {
506 struct ieee80211com *ic = vap->iv_ic;
507 struct ieee80211_scan_state *ss;
508
509 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, "%s: called\n", __func__);
510
511 IEEE80211_LOCK(ic);
512 ss = ic->ic_scan;
513 ss->ss_next = ss->ss_last; /* all channels are complete */
514
515 ic->ic_scan_methods->sc_scan_done(vap);
516
517 IEEE80211_UNLOCK(ic);
518 }
519
520 /*
521 * Probe the current channel, if allowed, while scanning.
522 * If the channel is not marked passive-only then send
523 * a probe request immediately. Otherwise mark state and
524 * listen for beacons on the channel; if we receive something
525 * then we'll transmit a probe request.
526 */
527 void
ieee80211_probe_curchan(struct ieee80211vap * vap,bool force)528 ieee80211_probe_curchan(struct ieee80211vap *vap, bool force)
529 {
530 struct ieee80211com *ic = vap->iv_ic;
531
532 if ((ic->ic_curchan->ic_flags & IEEE80211_CHAN_PASSIVE) && !force) {
533 ic->ic_flags_ext |= IEEE80211_FEXT_PROBECHAN;
534 return;
535 }
536
537 ic->ic_scan_methods->sc_scan_probe_curchan(vap, force);
538 }
539
540 #ifdef IEEE80211_DEBUG
541 static void
dump_country(const uint8_t * ie)542 dump_country(const uint8_t *ie)
543 {
544 const struct ieee80211_country_ie *cie =
545 (const struct ieee80211_country_ie *) ie;
546 int i, nbands, schan, nchan;
547
548 if (cie->len < 3) {
549 net80211_printf(" <bogus country ie, len %d>", cie->len);
550 return;
551 }
552 net80211_printf(" country [%c%c%c", cie->cc[0], cie->cc[1], cie->cc[2]);
553 nbands = (cie->len - 3) / sizeof(cie->band[0]);
554 for (i = 0; i < nbands; i++) {
555 schan = cie->band[i].schan;
556 nchan = cie->band[i].nchan;
557 if (nchan != 1)
558 net80211_printf(" %u-%u,%u", schan, schan + nchan-1,
559 cie->band[i].maxtxpwr);
560 else
561 net80211_printf(" %u,%u", schan, cie->band[i].maxtxpwr);
562 }
563 net80211_printf("]");
564 }
565
566 void
ieee80211_scan_dump_probe_beacon(uint8_t subtype,int isnew,const uint8_t mac[IEEE80211_ADDR_LEN],const struct ieee80211_scanparams * sp,int rssi)567 ieee80211_scan_dump_probe_beacon(uint8_t subtype, int isnew,
568 const uint8_t mac[IEEE80211_ADDR_LEN],
569 const struct ieee80211_scanparams *sp, int rssi)
570 {
571
572 net80211_printf("[%s] %s%s on chan %u (bss chan %u) ",
573 ether_sprintf(mac), isnew ? "new " : "",
574 ieee80211_mgt_subtype_name(subtype), sp->chan, sp->bchan);
575 ieee80211_print_essid(sp->ssid + 2, sp->ssid[1]);
576 net80211_printf(" rssi %d\n", rssi);
577
578 if (isnew) {
579 net80211_printf("[%s] caps 0x%x bintval %u erp 0x%x",
580 ether_sprintf(mac), sp->capinfo, sp->bintval, sp->erp);
581 if (sp->country != NULL)
582 dump_country(sp->country);
583 net80211_printf("\n");
584 }
585 }
586 #endif /* IEEE80211_DEBUG */
587
588 /*
589 * Process a beacon or probe response frame.
590 */
591 void
ieee80211_add_scan(struct ieee80211vap * vap,struct ieee80211_channel * curchan,const struct ieee80211_scanparams * sp,const struct ieee80211_frame * wh,int subtype,int rssi,int noise)592 ieee80211_add_scan(struct ieee80211vap *vap,
593 struct ieee80211_channel *curchan,
594 const struct ieee80211_scanparams *sp,
595 const struct ieee80211_frame *wh,
596 int subtype, int rssi, int noise)
597 {
598 struct ieee80211com *ic = vap->iv_ic;
599
600 return (ic->ic_scan_methods->sc_add_scan(vap, curchan, sp, wh, subtype,
601 rssi, noise));
602 }
603
604 /*
605 * Timeout/age scan cache entries; called from sta timeout
606 * timer (XXX should be self-contained).
607 */
608 void
ieee80211_scan_timeout(struct ieee80211com * ic)609 ieee80211_scan_timeout(struct ieee80211com *ic)
610 {
611 struct ieee80211_scan_state *ss = ic->ic_scan;
612
613 if (ss->ss_ops != NULL)
614 ss->ss_ops->scan_age(ss);
615 }
616
617 /*
618 * Mark a scan cache entry after a successful associate.
619 */
620 void
ieee80211_scan_assoc_success(struct ieee80211vap * vap,const uint8_t mac[IEEE80211_ADDR_LEN])621 ieee80211_scan_assoc_success(struct ieee80211vap *vap,
622 const uint8_t mac[IEEE80211_ADDR_LEN])
623 {
624 struct ieee80211_scan_state *ss = vap->iv_ic->ic_scan;
625
626 if (ss->ss_ops != NULL) {
627 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_SCAN,
628 mac, "%s", __func__);
629 ss->ss_ops->scan_assoc_success(ss, mac);
630 }
631 }
632
633 /*
634 * Demerit a scan cache entry after failing to associate.
635 */
636 void
ieee80211_scan_assoc_fail(struct ieee80211vap * vap,const uint8_t mac[IEEE80211_ADDR_LEN],int reason)637 ieee80211_scan_assoc_fail(struct ieee80211vap *vap,
638 const uint8_t mac[IEEE80211_ADDR_LEN], int reason)
639 {
640 struct ieee80211_scan_state *ss = vap->iv_ic->ic_scan;
641
642 if (ss->ss_ops != NULL) {
643 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_SCAN, mac,
644 "%s: reason %u", __func__, reason);
645 ss->ss_ops->scan_assoc_fail(ss, mac, reason);
646 }
647 }
648
649 /*
650 * Iterate over the contents of the scan cache.
651 */
652 void
ieee80211_scan_iterate(struct ieee80211vap * vap,ieee80211_scan_iter_func * f,void * arg)653 ieee80211_scan_iterate(struct ieee80211vap *vap,
654 ieee80211_scan_iter_func *f, void *arg)
655 {
656 struct ieee80211_scan_state *ss = vap->iv_ic->ic_scan;
657
658 if (ss->ss_ops != NULL)
659 ss->ss_ops->scan_iterate(ss, f, arg);
660 }
661
662 /*
663 * Flush the contents of the scan cache.
664 */
665 void
ieee80211_scan_flush(struct ieee80211vap * vap)666 ieee80211_scan_flush(struct ieee80211vap *vap)
667 {
668 struct ieee80211_scan_state *ss = vap->iv_ic->ic_scan;
669
670 if (ss->ss_ops != NULL && ss->ss_vap == vap) {
671 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, "%s\n", __func__);
672 ss->ss_ops->scan_flush(ss);
673 }
674 }
675
676 /*
677 * Check the scan cache for an ap/channel to use; if that
678 * fails then kick off a new scan.
679 */
680 struct ieee80211_channel *
ieee80211_scan_pickchannel(struct ieee80211com * ic,int flags)681 ieee80211_scan_pickchannel(struct ieee80211com *ic, int flags)
682 {
683 struct ieee80211_scan_state *ss = ic->ic_scan;
684
685 IEEE80211_LOCK_ASSERT(ic);
686
687 if (ss == NULL || ss->ss_ops == NULL || ss->ss_vap == NULL) {
688 /* XXX printf? */
689 return NULL;
690 }
691 if (ss->ss_ops->scan_pickchan == NULL) {
692 IEEE80211_DPRINTF(ss->ss_vap, IEEE80211_MSG_SCAN,
693 "%s: scan module does not support picking a channel, "
694 "opmode %s\n", __func__, ss->ss_vap->iv_opmode);
695 return NULL;
696 }
697 return ss->ss_ops->scan_pickchan(ss, flags);
698 }
699