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