ieee80211_proto.c revision 178354
1/*- 2 * Copyright (c) 2001 Atsushi Onoe 3 * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD: head/sys/net80211/ieee80211_proto.c 178354 2008-04-20 20:35:46Z sam $"); 29 30/* 31 * IEEE 802.11 protocol support. 32 */ 33 34#include "opt_inet.h" 35#include "opt_wlan.h" 36 37#include <sys/param.h> 38#include <sys/kernel.h> 39#include <sys/systm.h> 40#include <sys/taskqueue.h> 41 42#include <sys/socket.h> 43#include <sys/sockio.h> 44 45#include <net/if.h> 46#include <net/if_media.h> 47#include <net/ethernet.h> /* XXX for ether_sprintf */ 48 49#include <net80211/ieee80211_var.h> 50#include <net80211/ieee80211_adhoc.h> 51#include <net80211/ieee80211_sta.h> 52#include <net80211/ieee80211_hostap.h> 53#include <net80211/ieee80211_wds.h> 54#include <net80211/ieee80211_monitor.h> 55#include <net80211/ieee80211_input.h> 56 57/* XXX tunables */ 58#define AGGRESSIVE_MODE_SWITCH_HYSTERESIS 3 /* pkts / 100ms */ 59#define HIGH_PRI_SWITCH_THRESH 10 /* pkts / 100ms */ 60 61const char *ieee80211_mgt_subtype_name[] = { 62 "assoc_req", "assoc_resp", "reassoc_req", "reassoc_resp", 63 "probe_req", "probe_resp", "reserved#6", "reserved#7", 64 "beacon", "atim", "disassoc", "auth", 65 "deauth", "action", "reserved#14", "reserved#15" 66}; 67const char *ieee80211_ctl_subtype_name[] = { 68 "reserved#0", "reserved#1", "reserved#2", "reserved#3", 69 "reserved#3", "reserved#5", "reserved#6", "reserved#7", 70 "reserved#8", "reserved#9", "ps_poll", "rts", 71 "cts", "ack", "cf_end", "cf_end_ack" 72}; 73const char *ieee80211_opmode_name[IEEE80211_OPMODE_MAX] = { 74 "IBSS", /* IEEE80211_M_IBSS */ 75 "STA", /* IEEE80211_M_STA */ 76 "WDS", /* IEEE80211_M_WDS */ 77 "AHDEMO", /* IEEE80211_M_AHDEMO */ 78 "HOSTAP", /* IEEE80211_M_HOSTAP */ 79 "MONITOR" /* IEEE80211_M_MONITOR */ 80}; 81const char *ieee80211_state_name[IEEE80211_S_MAX] = { 82 "INIT", /* IEEE80211_S_INIT */ 83 "SCAN", /* IEEE80211_S_SCAN */ 84 "AUTH", /* IEEE80211_S_AUTH */ 85 "ASSOC", /* IEEE80211_S_ASSOC */ 86 "CAC", /* IEEE80211_S_CAC */ 87 "RUN", /* IEEE80211_S_RUN */ 88 "CSA", /* IEEE80211_S_CSA */ 89 "SLEEP", /* IEEE80211_S_SLEEP */ 90}; 91const char *ieee80211_wme_acnames[] = { 92 "WME_AC_BE", 93 "WME_AC_BK", 94 "WME_AC_VI", 95 "WME_AC_VO", 96 "WME_UPSD", 97}; 98 99static void parent_updown(void *, int); 100static int ieee80211_new_state_locked(struct ieee80211vap *, 101 enum ieee80211_state, int); 102 103static int 104null_raw_xmit(struct ieee80211_node *ni, struct mbuf *m, 105 const struct ieee80211_bpf_params *params) 106{ 107 struct ifnet *ifp = ni->ni_ic->ic_ifp; 108 109 if_printf(ifp, "missing ic_raw_xmit callback, drop frame\n"); 110 m_freem(m); 111 return ENETDOWN; 112} 113 114void 115ieee80211_proto_attach(struct ieee80211com *ic) 116{ 117 struct ifnet *ifp = ic->ic_ifp; 118 119 /* override the 802.3 setting */ 120 ifp->if_hdrlen = ic->ic_headroom 121 + sizeof(struct ieee80211_qosframe_addr4) 122 + IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN 123 + IEEE80211_WEP_EXTIVLEN; 124 /* XXX no way to recalculate on ifdetach */ 125 if (ALIGN(ifp->if_hdrlen) > max_linkhdr) { 126 /* XXX sanity check... */ 127 max_linkhdr = ALIGN(ifp->if_hdrlen); 128 max_hdr = max_linkhdr + max_protohdr; 129 max_datalen = MHLEN - max_hdr; 130 } 131 ic->ic_protmode = IEEE80211_PROT_CTSONLY; 132 133 TASK_INIT(&ic->ic_parent_task, 0, parent_updown, ifp); 134 135 ic->ic_wme.wme_hipri_switch_hysteresis = 136 AGGRESSIVE_MODE_SWITCH_HYSTERESIS; 137 138 /* initialize management frame handlers */ 139 ic->ic_send_mgmt = ieee80211_send_mgmt; 140 ic->ic_raw_xmit = null_raw_xmit; 141 142 ieee80211_adhoc_attach(ic); 143 ieee80211_sta_attach(ic); 144 ieee80211_wds_attach(ic); 145 ieee80211_hostap_attach(ic); 146 ieee80211_monitor_attach(ic); 147} 148 149void 150ieee80211_proto_detach(struct ieee80211com *ic) 151{ 152 ieee80211_monitor_detach(ic); 153 ieee80211_hostap_detach(ic); 154 ieee80211_wds_detach(ic); 155 ieee80211_adhoc_detach(ic); 156 ieee80211_sta_detach(ic); 157} 158 159static void 160null_update_beacon(struct ieee80211vap *vap, int item) 161{ 162} 163 164void 165ieee80211_proto_vattach(struct ieee80211vap *vap) 166{ 167 struct ieee80211com *ic = vap->iv_ic; 168 struct ifnet *ifp = vap->iv_ifp; 169 int i; 170 171 /* override the 802.3 setting */ 172 ifp->if_hdrlen = ic->ic_ifp->if_hdrlen; 173 174 vap->iv_rtsthreshold = IEEE80211_RTS_DEFAULT; 175 vap->iv_fragthreshold = IEEE80211_FRAG_DEFAULT; 176 vap->iv_bmiss_max = IEEE80211_BMISS_MAX; 177 callout_init(&vap->iv_swbmiss, CALLOUT_MPSAFE); 178 callout_init(&vap->iv_mgtsend, CALLOUT_MPSAFE); 179 /* 180 * Install default tx rate handling: no fixed rate, lowest 181 * supported rate for mgmt and multicast frames. Default 182 * max retry count. These settings can be changed by the 183 * driver and/or user applications. 184 */ 185 for (i = IEEE80211_MODE_11A; i < IEEE80211_MODE_11NA; i++) { 186 const struct ieee80211_rateset *rs = &ic->ic_sup_rates[i]; 187 188 vap->iv_txparms[i].ucastrate = IEEE80211_FIXED_RATE_NONE; 189 /* NB: we default to min supported rate for channel */ 190 vap->iv_txparms[i].mgmtrate = 191 rs->rs_rates[0] & IEEE80211_RATE_VAL; 192 vap->iv_txparms[i].mcastrate = 193 rs->rs_rates[0] & IEEE80211_RATE_VAL; 194 vap->iv_txparms[i].maxretry = IEEE80211_TXMAX_DEFAULT; 195 } 196 for (; i < IEEE80211_MODE_MAX; i++) { 197 vap->iv_txparms[i].ucastrate = IEEE80211_FIXED_RATE_NONE; 198 /* NB: default to MCS 0 */ 199 vap->iv_txparms[i].mgmtrate = 0 | 0x80; 200 vap->iv_txparms[i].mcastrate = 0 | 0x80; 201 vap->iv_txparms[i].maxretry = IEEE80211_TXMAX_DEFAULT; 202 } 203 vap->iv_roaming = IEEE80211_ROAMING_AUTO; 204 205 vap->iv_update_beacon = null_update_beacon; 206 vap->iv_deliver_data = ieee80211_deliver_data; 207 208 /* attach support for operating mode */ 209 ic->ic_vattach[vap->iv_opmode](vap); 210} 211 212void 213ieee80211_proto_vdetach(struct ieee80211vap *vap) 214{ 215#define FREEAPPIE(ie) do { \ 216 if (ie != NULL) \ 217 FREE(ie, M_80211_NODE_IE); \ 218} while (0) 219 /* 220 * Detach operating mode module. 221 */ 222 if (vap->iv_opdetach != NULL) 223 vap->iv_opdetach(vap); 224 /* 225 * This should not be needed as we detach when reseting 226 * the state but be conservative here since the 227 * authenticator may do things like spawn kernel threads. 228 */ 229 if (vap->iv_auth->ia_detach != NULL) 230 vap->iv_auth->ia_detach(vap); 231 /* 232 * Detach any ACL'ator. 233 */ 234 if (vap->iv_acl != NULL) 235 vap->iv_acl->iac_detach(vap); 236 237 FREEAPPIE(vap->iv_appie_beacon); 238 FREEAPPIE(vap->iv_appie_probereq); 239 FREEAPPIE(vap->iv_appie_proberesp); 240 FREEAPPIE(vap->iv_appie_assocreq); 241 FREEAPPIE(vap->iv_appie_assocresp); 242 FREEAPPIE(vap->iv_appie_wpa); 243#undef FREEAPPIE 244} 245 246/* 247 * Simple-minded authenticator module support. 248 */ 249 250#define IEEE80211_AUTH_MAX (IEEE80211_AUTH_WPA+1) 251/* XXX well-known names */ 252static const char *auth_modnames[IEEE80211_AUTH_MAX] = { 253 "wlan_internal", /* IEEE80211_AUTH_NONE */ 254 "wlan_internal", /* IEEE80211_AUTH_OPEN */ 255 "wlan_internal", /* IEEE80211_AUTH_SHARED */ 256 "wlan_xauth", /* IEEE80211_AUTH_8021X */ 257 "wlan_internal", /* IEEE80211_AUTH_AUTO */ 258 "wlan_xauth", /* IEEE80211_AUTH_WPA */ 259}; 260static const struct ieee80211_authenticator *authenticators[IEEE80211_AUTH_MAX]; 261 262static const struct ieee80211_authenticator auth_internal = { 263 .ia_name = "wlan_internal", 264 .ia_attach = NULL, 265 .ia_detach = NULL, 266 .ia_node_join = NULL, 267 .ia_node_leave = NULL, 268}; 269 270/* 271 * Setup internal authenticators once; they are never unregistered. 272 */ 273static void 274ieee80211_auth_setup(void) 275{ 276 ieee80211_authenticator_register(IEEE80211_AUTH_OPEN, &auth_internal); 277 ieee80211_authenticator_register(IEEE80211_AUTH_SHARED, &auth_internal); 278 ieee80211_authenticator_register(IEEE80211_AUTH_AUTO, &auth_internal); 279} 280SYSINIT(wlan_auth, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_auth_setup, NULL); 281 282const struct ieee80211_authenticator * 283ieee80211_authenticator_get(int auth) 284{ 285 if (auth >= IEEE80211_AUTH_MAX) 286 return NULL; 287 if (authenticators[auth] == NULL) 288 ieee80211_load_module(auth_modnames[auth]); 289 return authenticators[auth]; 290} 291 292void 293ieee80211_authenticator_register(int type, 294 const struct ieee80211_authenticator *auth) 295{ 296 if (type >= IEEE80211_AUTH_MAX) 297 return; 298 authenticators[type] = auth; 299} 300 301void 302ieee80211_authenticator_unregister(int type) 303{ 304 305 if (type >= IEEE80211_AUTH_MAX) 306 return; 307 authenticators[type] = NULL; 308} 309 310/* 311 * Very simple-minded ACL module support. 312 */ 313/* XXX just one for now */ 314static const struct ieee80211_aclator *acl = NULL; 315 316void 317ieee80211_aclator_register(const struct ieee80211_aclator *iac) 318{ 319 printf("wlan: %s acl policy registered\n", iac->iac_name); 320 acl = iac; 321} 322 323void 324ieee80211_aclator_unregister(const struct ieee80211_aclator *iac) 325{ 326 if (acl == iac) 327 acl = NULL; 328 printf("wlan: %s acl policy unregistered\n", iac->iac_name); 329} 330 331const struct ieee80211_aclator * 332ieee80211_aclator_get(const char *name) 333{ 334 if (acl == NULL) 335 ieee80211_load_module("wlan_acl"); 336 return acl != NULL && strcmp(acl->iac_name, name) == 0 ? acl : NULL; 337} 338 339void 340ieee80211_print_essid(const uint8_t *essid, int len) 341{ 342 const uint8_t *p; 343 int i; 344 345 if (len > IEEE80211_NWID_LEN) 346 len = IEEE80211_NWID_LEN; 347 /* determine printable or not */ 348 for (i = 0, p = essid; i < len; i++, p++) { 349 if (*p < ' ' || *p > 0x7e) 350 break; 351 } 352 if (i == len) { 353 printf("\""); 354 for (i = 0, p = essid; i < len; i++, p++) 355 printf("%c", *p); 356 printf("\""); 357 } else { 358 printf("0x"); 359 for (i = 0, p = essid; i < len; i++, p++) 360 printf("%02x", *p); 361 } 362} 363 364void 365ieee80211_dump_pkt(struct ieee80211com *ic, 366 const uint8_t *buf, int len, int rate, int rssi) 367{ 368 const struct ieee80211_frame *wh; 369 int i; 370 371 wh = (const struct ieee80211_frame *)buf; 372 switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) { 373 case IEEE80211_FC1_DIR_NODS: 374 printf("NODS %s", ether_sprintf(wh->i_addr2)); 375 printf("->%s", ether_sprintf(wh->i_addr1)); 376 printf("(%s)", ether_sprintf(wh->i_addr3)); 377 break; 378 case IEEE80211_FC1_DIR_TODS: 379 printf("TODS %s", ether_sprintf(wh->i_addr2)); 380 printf("->%s", ether_sprintf(wh->i_addr3)); 381 printf("(%s)", ether_sprintf(wh->i_addr1)); 382 break; 383 case IEEE80211_FC1_DIR_FROMDS: 384 printf("FRDS %s", ether_sprintf(wh->i_addr3)); 385 printf("->%s", ether_sprintf(wh->i_addr1)); 386 printf("(%s)", ether_sprintf(wh->i_addr2)); 387 break; 388 case IEEE80211_FC1_DIR_DSTODS: 389 printf("DSDS %s", ether_sprintf((const uint8_t *)&wh[1])); 390 printf("->%s", ether_sprintf(wh->i_addr3)); 391 printf("(%s", ether_sprintf(wh->i_addr2)); 392 printf("->%s)", ether_sprintf(wh->i_addr1)); 393 break; 394 } 395 switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) { 396 case IEEE80211_FC0_TYPE_DATA: 397 printf(" data"); 398 break; 399 case IEEE80211_FC0_TYPE_MGT: 400 printf(" %s", ieee80211_mgt_subtype_name[ 401 (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) 402 >> IEEE80211_FC0_SUBTYPE_SHIFT]); 403 break; 404 default: 405 printf(" type#%d", wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK); 406 break; 407 } 408 if (IEEE80211_QOS_HAS_SEQ(wh)) { 409 const struct ieee80211_qosframe *qwh = 410 (const struct ieee80211_qosframe *)buf; 411 printf(" QoS [TID %u%s]", qwh->i_qos[0] & IEEE80211_QOS_TID, 412 qwh->i_qos[0] & IEEE80211_QOS_ACKPOLICY ? " ACM" : ""); 413 } 414 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 415 int off; 416 417 off = ieee80211_anyhdrspace(ic, wh); 418 printf(" WEP [IV %.02x %.02x %.02x", 419 buf[off+0], buf[off+1], buf[off+2]); 420 if (buf[off+IEEE80211_WEP_IVLEN] & IEEE80211_WEP_EXTIV) 421 printf(" %.02x %.02x %.02x", 422 buf[off+4], buf[off+5], buf[off+6]); 423 printf(" KID %u]", buf[off+IEEE80211_WEP_IVLEN] >> 6); 424 } 425 if (rate >= 0) 426 printf(" %dM", rate / 2); 427 if (rssi >= 0) 428 printf(" +%d", rssi); 429 printf("\n"); 430 if (len > 0) { 431 for (i = 0; i < len; i++) { 432 if ((i & 1) == 0) 433 printf(" "); 434 printf("%02x", buf[i]); 435 } 436 printf("\n"); 437 } 438} 439 440static __inline int 441findrix(const struct ieee80211_rateset *rs, int r) 442{ 443 int i; 444 445 for (i = 0; i < rs->rs_nrates; i++) 446 if ((rs->rs_rates[i] & IEEE80211_RATE_VAL) == r) 447 return i; 448 return -1; 449} 450 451int 452ieee80211_fix_rate(struct ieee80211_node *ni, 453 struct ieee80211_rateset *nrs, int flags) 454{ 455#define RV(v) ((v) & IEEE80211_RATE_VAL) 456 struct ieee80211vap *vap = ni->ni_vap; 457 struct ieee80211com *ic = ni->ni_ic; 458 int i, j, rix, error; 459 int okrate, badrate, fixedrate, ucastrate; 460 const struct ieee80211_rateset *srs; 461 uint8_t r; 462 463 error = 0; 464 okrate = badrate = 0; 465 ucastrate = vap->iv_txparms[ieee80211_chan2mode(ni->ni_chan)].ucastrate; 466 if (ucastrate != IEEE80211_FIXED_RATE_NONE) { 467 /* 468 * Workaround awkwardness with fixed rate. We are called 469 * to check both the legacy rate set and the HT rate set 470 * but we must apply any legacy fixed rate check only to the 471 * legacy rate set and vice versa. We cannot tell what type 472 * of rate set we've been given (legacy or HT) but we can 473 * distinguish the fixed rate type (MCS have 0x80 set). 474 * So to deal with this the caller communicates whether to 475 * check MCS or legacy rate using the flags and we use the 476 * type of any fixed rate to avoid applying an MCS to a 477 * legacy rate and vice versa. 478 */ 479 if (ucastrate & 0x80) { 480 if (flags & IEEE80211_F_DOFRATE) 481 flags &= ~IEEE80211_F_DOFRATE; 482 } else if ((ucastrate & 0x80) == 0) { 483 if (flags & IEEE80211_F_DOFMCS) 484 flags &= ~IEEE80211_F_DOFMCS; 485 } 486 /* NB: required to make MCS match below work */ 487 ucastrate &= IEEE80211_RATE_VAL; 488 } 489 fixedrate = IEEE80211_FIXED_RATE_NONE; 490 /* 491 * XXX we are called to process both MCS and legacy rates; 492 * we must use the appropriate basic rate set or chaos will 493 * ensue; for now callers that want MCS must supply 494 * IEEE80211_F_DOBRS; at some point we'll need to split this 495 * function so there are two variants, one for MCS and one 496 * for legacy rates. 497 */ 498 if (flags & IEEE80211_F_DOBRS) 499 srs = (const struct ieee80211_rateset *) 500 ieee80211_get_suphtrates(ic, ni->ni_chan); 501 else 502 srs = ieee80211_get_suprates(ic, ni->ni_chan); 503 for (i = 0; i < nrs->rs_nrates; ) { 504 if (flags & IEEE80211_F_DOSORT) { 505 /* 506 * Sort rates. 507 */ 508 for (j = i + 1; j < nrs->rs_nrates; j++) { 509 if (RV(nrs->rs_rates[i]) > RV(nrs->rs_rates[j])) { 510 r = nrs->rs_rates[i]; 511 nrs->rs_rates[i] = nrs->rs_rates[j]; 512 nrs->rs_rates[j] = r; 513 } 514 } 515 } 516 r = nrs->rs_rates[i] & IEEE80211_RATE_VAL; 517 badrate = r; 518 /* 519 * Check for fixed rate. 520 */ 521 if (r == ucastrate) 522 fixedrate = r; 523 /* 524 * Check against supported rates. 525 */ 526 rix = findrix(srs, r); 527 if (flags & IEEE80211_F_DONEGO) { 528 if (rix < 0) { 529 /* 530 * A rate in the node's rate set is not 531 * supported. If this is a basic rate and we 532 * are operating as a STA then this is an error. 533 * Otherwise we just discard/ignore the rate. 534 */ 535 if ((flags & IEEE80211_F_JOIN) && 536 (nrs->rs_rates[i] & IEEE80211_RATE_BASIC)) 537 error++; 538 } else if ((flags & IEEE80211_F_JOIN) == 0) { 539 /* 540 * Overwrite with the supported rate 541 * value so any basic rate bit is set. 542 */ 543 nrs->rs_rates[i] = srs->rs_rates[rix]; 544 } 545 } 546 if ((flags & IEEE80211_F_DODEL) && rix < 0) { 547 /* 548 * Delete unacceptable rates. 549 */ 550 nrs->rs_nrates--; 551 for (j = i; j < nrs->rs_nrates; j++) 552 nrs->rs_rates[j] = nrs->rs_rates[j + 1]; 553 nrs->rs_rates[j] = 0; 554 continue; 555 } 556 if (rix >= 0) 557 okrate = nrs->rs_rates[i]; 558 i++; 559 } 560 if (okrate == 0 || error != 0 || 561 ((flags & (IEEE80211_F_DOFRATE|IEEE80211_F_DOFMCS)) && 562 fixedrate != ucastrate)) { 563 IEEE80211_NOTE(vap, IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni, 564 "%s: flags 0x%x okrate %d error %d fixedrate 0x%x " 565 "ucastrate %x\n", __func__, fixedrate, ucastrate, flags); 566 return badrate | IEEE80211_RATE_BASIC; 567 } else 568 return RV(okrate); 569#undef RV 570} 571 572/* 573 * Reset 11g-related state. 574 */ 575void 576ieee80211_reset_erp(struct ieee80211com *ic) 577{ 578 ic->ic_flags &= ~IEEE80211_F_USEPROT; 579 ic->ic_nonerpsta = 0; 580 ic->ic_longslotsta = 0; 581 /* 582 * Short slot time is enabled only when operating in 11g 583 * and not in an IBSS. We must also honor whether or not 584 * the driver is capable of doing it. 585 */ 586 ieee80211_set_shortslottime(ic, 587 IEEE80211_IS_CHAN_A(ic->ic_curchan) || 588 IEEE80211_IS_CHAN_HT(ic->ic_curchan) || 589 (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 590 ic->ic_opmode == IEEE80211_M_HOSTAP && 591 (ic->ic_caps & IEEE80211_C_SHSLOT))); 592 /* 593 * Set short preamble and ERP barker-preamble flags. 594 */ 595 if (IEEE80211_IS_CHAN_A(ic->ic_curchan) || 596 (ic->ic_caps & IEEE80211_C_SHPREAMBLE)) { 597 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 598 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 599 } else { 600 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 601 ic->ic_flags |= IEEE80211_F_USEBARKER; 602 } 603} 604 605/* 606 * Set the short slot time state and notify the driver. 607 */ 608void 609ieee80211_set_shortslottime(struct ieee80211com *ic, int onoff) 610{ 611 if (onoff) 612 ic->ic_flags |= IEEE80211_F_SHSLOT; 613 else 614 ic->ic_flags &= ~IEEE80211_F_SHSLOT; 615 /* notify driver */ 616 if (ic->ic_updateslot != NULL) 617 ic->ic_updateslot(ic->ic_ifp); 618} 619 620/* 621 * Check if the specified rate set supports ERP. 622 * NB: the rate set is assumed to be sorted. 623 */ 624int 625ieee80211_iserp_rateset(const struct ieee80211_rateset *rs) 626{ 627#define N(a) (sizeof(a) / sizeof(a[0])) 628 static const int rates[] = { 2, 4, 11, 22, 12, 24, 48 }; 629 int i, j; 630 631 if (rs->rs_nrates < N(rates)) 632 return 0; 633 for (i = 0; i < N(rates); i++) { 634 for (j = 0; j < rs->rs_nrates; j++) { 635 int r = rs->rs_rates[j] & IEEE80211_RATE_VAL; 636 if (rates[i] == r) 637 goto next; 638 if (r > rates[i]) 639 return 0; 640 } 641 return 0; 642 next: 643 ; 644 } 645 return 1; 646#undef N 647} 648 649/* 650 * Mark the basic rates for the rate table based on the 651 * operating mode. For real 11g we mark all the 11b rates 652 * and 6, 12, and 24 OFDM. For 11b compatibility we mark only 653 * 11b rates. There's also a pseudo 11a-mode used to mark only 654 * the basic OFDM rates. 655 */ 656static void 657setbasicrates(struct ieee80211_rateset *rs, 658 enum ieee80211_phymode mode, int add) 659{ 660 static const struct ieee80211_rateset basic[IEEE80211_MODE_MAX] = { 661 { .rs_nrates = 0 }, /* IEEE80211_MODE_AUTO */ 662 { 3, { 12, 24, 48 } }, /* IEEE80211_MODE_11A */ 663 { 2, { 2, 4 } }, /* IEEE80211_MODE_11B */ 664 { 4, { 2, 4, 11, 22 } }, /* IEEE80211_MODE_11G (mixed b/g) */ 665 { .rs_nrates = 0 }, /* IEEE80211_MODE_FH */ 666 { 3, { 12, 24, 48 } }, /* IEEE80211_MODE_TURBO_A */ 667 { 4, { 2, 4, 11, 22 } }, /* IEEE80211_MODE_TURBO_G (mixed b/g) */ 668 { 3, { 12, 24, 48 } }, /* IEEE80211_MODE_STURBO_A */ 669 { 3, { 12, 24, 48 } }, /* IEEE80211_MODE_11NA */ 670 { 4, { 2, 4, 11, 22 } }, /* IEEE80211_MODE_11NG (mixed b/g) */ 671 }; 672 int i, j; 673 674 for (i = 0; i < rs->rs_nrates; i++) { 675 if (!add) 676 rs->rs_rates[i] &= IEEE80211_RATE_VAL; 677 for (j = 0; j < basic[mode].rs_nrates; j++) 678 if (basic[mode].rs_rates[j] == rs->rs_rates[i]) { 679 rs->rs_rates[i] |= IEEE80211_RATE_BASIC; 680 break; 681 } 682 } 683} 684 685/* 686 * Set the basic rates in a rate set. 687 */ 688void 689ieee80211_setbasicrates(struct ieee80211_rateset *rs, 690 enum ieee80211_phymode mode) 691{ 692 setbasicrates(rs, mode, 0); 693} 694 695/* 696 * Add basic rates to a rate set. 697 */ 698void 699ieee80211_addbasicrates(struct ieee80211_rateset *rs, 700 enum ieee80211_phymode mode) 701{ 702 setbasicrates(rs, mode, 1); 703} 704 705/* 706 * WME protocol support. 707 * 708 * The default 11a/b/g/n parameters come from the WiFi Alliance WMM 709 * System Interopability Test Plan (v1.4, Appendix F) and the 802.11n 710 * Draft 2.0 Test Plan (Appendix D). 711 * 712 * Static/Dynamic Turbo mode settings come from Atheros. 713 */ 714typedef struct phyParamType { 715 uint8_t aifsn; 716 uint8_t logcwmin; 717 uint8_t logcwmax; 718 uint16_t txopLimit; 719 uint8_t acm; 720} paramType; 721 722static const struct phyParamType phyParamForAC_BE[IEEE80211_MODE_MAX] = { 723 { 3, 4, 6, 0, 0 }, /* IEEE80211_MODE_AUTO */ 724 { 3, 4, 6, 0, 0 }, /* IEEE80211_MODE_11A */ 725 { 3, 4, 6, 0, 0 }, /* IEEE80211_MODE_11B */ 726 { 3, 4, 6, 0, 0 }, /* IEEE80211_MODE_11G */ 727 { 3, 4, 6, 0, 0 }, /* IEEE80211_MODE_FH */ 728 { 2, 3, 5, 0, 0 }, /* IEEE80211_MODE_TURBO_A */ 729 { 2, 3, 5, 0, 0 }, /* IEEE80211_MODE_TURBO_G */ 730 { 2, 3, 5, 0, 0 }, /* IEEE80211_MODE_STURBO_A */ 731 { 3, 4, 6, 0, 0 }, /* IEEE80211_MODE_11NA */ 732 { 3, 4, 6, 0, 0 }, /* IEEE80211_MODE_11NG */ 733}; 734static const struct phyParamType phyParamForAC_BK[IEEE80211_MODE_MAX] = { 735 { 7, 4, 10, 0, 0 }, /* IEEE80211_MODE_AUTO */ 736 { 7, 4, 10, 0, 0 }, /* IEEE80211_MODE_11A */ 737 { 7, 4, 10, 0, 0 }, /* IEEE80211_MODE_11B */ 738 { 7, 4, 10, 0, 0 }, /* IEEE80211_MODE_11G */ 739 { 7, 4, 10, 0, 0 }, /* IEEE80211_MODE_FH */ 740 { 7, 3, 10, 0, 0 }, /* IEEE80211_MODE_TURBO_A */ 741 { 7, 3, 10, 0, 0 }, /* IEEE80211_MODE_TURBO_G */ 742 { 7, 3, 10, 0, 0 }, /* IEEE80211_MODE_STURBO_A */ 743 { 7, 4, 10, 0, 0 }, /* IEEE80211_MODE_11NA */ 744 { 7, 4, 10, 0, 0 }, /* IEEE80211_MODE_11NG */ 745}; 746static const struct phyParamType phyParamForAC_VI[IEEE80211_MODE_MAX] = { 747 { 1, 3, 4, 94, 0 }, /* IEEE80211_MODE_AUTO */ 748 { 1, 3, 4, 94, 0 }, /* IEEE80211_MODE_11A */ 749 { 1, 3, 4, 188, 0 }, /* IEEE80211_MODE_11B */ 750 { 1, 3, 4, 94, 0 }, /* IEEE80211_MODE_11G */ 751 { 1, 3, 4, 188, 0 }, /* IEEE80211_MODE_FH */ 752 { 1, 2, 3, 94, 0 }, /* IEEE80211_MODE_TURBO_A */ 753 { 1, 2, 3, 94, 0 }, /* IEEE80211_MODE_TURBO_G */ 754 { 1, 2, 3, 94, 0 }, /* IEEE80211_MODE_STURBO_A */ 755 { 1, 3, 4, 94, 0 }, /* IEEE80211_MODE_11NA */ 756 { 1, 3, 4, 94, 0 }, /* IEEE80211_MODE_11NG */ 757}; 758static const struct phyParamType phyParamForAC_VO[IEEE80211_MODE_MAX] = { 759 { 1, 2, 3, 47, 0 }, /* IEEE80211_MODE_AUTO */ 760 { 1, 2, 3, 47, 0 }, /* IEEE80211_MODE_11A */ 761 { 1, 2, 3, 102, 0 }, /* IEEE80211_MODE_11B */ 762 { 1, 2, 3, 47, 0 }, /* IEEE80211_MODE_11G */ 763 { 1, 2, 3, 102, 0 }, /* IEEE80211_MODE_FH */ 764 { 1, 2, 2, 47, 0 }, /* IEEE80211_MODE_TURBO_A */ 765 { 1, 2, 2, 47, 0 }, /* IEEE80211_MODE_TURBO_G */ 766 { 1, 2, 2, 47, 0 }, /* IEEE80211_MODE_STURBO_A */ 767 { 1, 2, 3, 47, 0 }, /* IEEE80211_MODE_11NA */ 768 { 1, 2, 3, 47, 0 }, /* IEEE80211_MODE_11NG */ 769}; 770 771static const struct phyParamType bssPhyParamForAC_BE[IEEE80211_MODE_MAX] = { 772 { 3, 4, 10, 0, 0 }, /* IEEE80211_MODE_AUTO */ 773 { 3, 4, 10, 0, 0 }, /* IEEE80211_MODE_11A */ 774 { 3, 4, 10, 0, 0 }, /* IEEE80211_MODE_11B */ 775 { 3, 4, 10, 0, 0 }, /* IEEE80211_MODE_11G */ 776 { 3, 4, 10, 0, 0 }, /* IEEE80211_MODE_FH */ 777 { 2, 3, 10, 0, 0 }, /* IEEE80211_MODE_TURBO_A */ 778 { 2, 3, 10, 0, 0 }, /* IEEE80211_MODE_TURBO_G */ 779 { 2, 3, 10, 0, 0 }, /* IEEE80211_MODE_STURBO_A */ 780 { 3, 4, 10, 0, 0 }, /* IEEE80211_MODE_11NA */ 781 { 3, 4, 10, 0, 0 }, /* IEEE80211_MODE_11NG */ 782}; 783static const struct phyParamType bssPhyParamForAC_VI[IEEE80211_MODE_MAX] = { 784 { 2, 3, 4, 94, 0 }, /* IEEE80211_MODE_AUTO */ 785 { 2, 3, 4, 94, 0 }, /* IEEE80211_MODE_11A */ 786 { 2, 3, 4, 188, 0 }, /* IEEE80211_MODE_11B */ 787 { 2, 3, 4, 94, 0 }, /* IEEE80211_MODE_11G */ 788 { 2, 3, 4, 188, 0 }, /* IEEE80211_MODE_FH */ 789 { 2, 2, 3, 94, 0 }, /* IEEE80211_MODE_TURBO_A */ 790 { 2, 2, 3, 94, 0 }, /* IEEE80211_MODE_TURBO_G */ 791 { 2, 2, 3, 94, 0 }, /* IEEE80211_MODE_STURBO_A */ 792 { 2, 3, 4, 94, 0 }, /* IEEE80211_MODE_11NA */ 793 { 2, 3, 4, 94, 0 }, /* IEEE80211_MODE_11NG */ 794}; 795static const struct phyParamType bssPhyParamForAC_VO[IEEE80211_MODE_MAX] = { 796 { 2, 2, 3, 47, 0 }, /* IEEE80211_MODE_AUTO */ 797 { 2, 2, 3, 47, 0 }, /* IEEE80211_MODE_11A */ 798 { 2, 2, 3, 102, 0 }, /* IEEE80211_MODE_11B */ 799 { 2, 2, 3, 47, 0 }, /* IEEE80211_MODE_11G */ 800 { 2, 2, 3, 102, 0 }, /* IEEE80211_MODE_FH */ 801 { 1, 2, 2, 47, 0 }, /* IEEE80211_MODE_TURBO_A */ 802 { 1, 2, 2, 47, 0 }, /* IEEE80211_MODE_TURBO_G */ 803 { 1, 2, 2, 47, 0 }, /* IEEE80211_MODE_STURBO_A */ 804 { 2, 2, 3, 47, 0 }, /* IEEE80211_MODE_11NA */ 805 { 2, 2, 3, 47, 0 }, /* IEEE80211_MODE_11NG */ 806}; 807 808static void 809ieee80211_wme_initparams_locked(struct ieee80211vap *vap) 810{ 811 struct ieee80211com *ic = vap->iv_ic; 812 struct ieee80211_wme_state *wme = &ic->ic_wme; 813 const paramType *pPhyParam, *pBssPhyParam; 814 struct wmeParams *wmep; 815 enum ieee80211_phymode mode; 816 int i; 817 818 IEEE80211_LOCK_ASSERT(ic); 819 820 if ((ic->ic_caps & IEEE80211_C_WME) == 0) 821 return; 822 823 /* 824 * Select mode; we can be called early in which case we 825 * always use auto mode. We know we'll be called when 826 * entering the RUN state with bsschan setup properly 827 * so state will eventually get set correctly 828 */ 829 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC) 830 mode = ieee80211_chan2mode(ic->ic_bsschan); 831 else 832 mode = IEEE80211_MODE_AUTO; 833 for (i = 0; i < WME_NUM_AC; i++) { 834 switch (i) { 835 case WME_AC_BK: 836 pPhyParam = &phyParamForAC_BK[mode]; 837 pBssPhyParam = &phyParamForAC_BK[mode]; 838 break; 839 case WME_AC_VI: 840 pPhyParam = &phyParamForAC_VI[mode]; 841 pBssPhyParam = &bssPhyParamForAC_VI[mode]; 842 break; 843 case WME_AC_VO: 844 pPhyParam = &phyParamForAC_VO[mode]; 845 pBssPhyParam = &bssPhyParamForAC_VO[mode]; 846 break; 847 case WME_AC_BE: 848 default: 849 pPhyParam = &phyParamForAC_BE[mode]; 850 pBssPhyParam = &bssPhyParamForAC_BE[mode]; 851 break; 852 } 853 854 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i]; 855 if (ic->ic_opmode == IEEE80211_M_HOSTAP) { 856 wmep->wmep_acm = pPhyParam->acm; 857 wmep->wmep_aifsn = pPhyParam->aifsn; 858 wmep->wmep_logcwmin = pPhyParam->logcwmin; 859 wmep->wmep_logcwmax = pPhyParam->logcwmax; 860 wmep->wmep_txopLimit = pPhyParam->txopLimit; 861 } else { 862 wmep->wmep_acm = pBssPhyParam->acm; 863 wmep->wmep_aifsn = pBssPhyParam->aifsn; 864 wmep->wmep_logcwmin = pBssPhyParam->logcwmin; 865 wmep->wmep_logcwmax = pBssPhyParam->logcwmax; 866 wmep->wmep_txopLimit = pBssPhyParam->txopLimit; 867 868 } 869 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 870 "%s: %s chan [acm %u aifsn %u log2(cwmin) %u " 871 "log2(cwmax) %u txpoLimit %u]\n", __func__ 872 , ieee80211_wme_acnames[i] 873 , wmep->wmep_acm 874 , wmep->wmep_aifsn 875 , wmep->wmep_logcwmin 876 , wmep->wmep_logcwmax 877 , wmep->wmep_txopLimit 878 ); 879 880 wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i]; 881 wmep->wmep_acm = pBssPhyParam->acm; 882 wmep->wmep_aifsn = pBssPhyParam->aifsn; 883 wmep->wmep_logcwmin = pBssPhyParam->logcwmin; 884 wmep->wmep_logcwmax = pBssPhyParam->logcwmax; 885 wmep->wmep_txopLimit = pBssPhyParam->txopLimit; 886 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 887 "%s: %s bss [acm %u aifsn %u log2(cwmin) %u " 888 "log2(cwmax) %u txpoLimit %u]\n", __func__ 889 , ieee80211_wme_acnames[i] 890 , wmep->wmep_acm 891 , wmep->wmep_aifsn 892 , wmep->wmep_logcwmin 893 , wmep->wmep_logcwmax 894 , wmep->wmep_txopLimit 895 ); 896 } 897 /* NB: check ic_bss to avoid NULL deref on initial attach */ 898 if (vap->iv_bss != NULL) { 899 /* 900 * Calculate agressive mode switching threshold based 901 * on beacon interval. This doesn't need locking since 902 * we're only called before entering the RUN state at 903 * which point we start sending beacon frames. 904 */ 905 wme->wme_hipri_switch_thresh = 906 (HIGH_PRI_SWITCH_THRESH * vap->iv_bss->ni_intval) / 100; 907 ieee80211_wme_updateparams(vap); 908 } 909} 910 911void 912ieee80211_wme_initparams(struct ieee80211vap *vap) 913{ 914 struct ieee80211com *ic = vap->iv_ic; 915 916 IEEE80211_LOCK(ic); 917 ieee80211_wme_initparams_locked(vap); 918 IEEE80211_UNLOCK(ic); 919} 920 921/* 922 * Update WME parameters for ourself and the BSS. 923 */ 924void 925ieee80211_wme_updateparams_locked(struct ieee80211vap *vap) 926{ 927 static const paramType phyParam[IEEE80211_MODE_MAX] = { 928 { 2, 4, 10, 64, 0 }, /* IEEE80211_MODE_AUTO */ 929 { 2, 4, 10, 64, 0 }, /* IEEE80211_MODE_11A */ 930 { 2, 5, 10, 64, 0 }, /* IEEE80211_MODE_11B */ 931 { 2, 4, 10, 64, 0 }, /* IEEE80211_MODE_11G */ 932 { 2, 5, 10, 64, 0 }, /* IEEE80211_MODE_FH */ 933 { 1, 3, 10, 64, 0 }, /* IEEE80211_MODE_TURBO_A */ 934 { 1, 3, 10, 64, 0 }, /* IEEE80211_MODE_TURBO_G */ 935 { 1, 3, 10, 64, 0 }, /* IEEE80211_MODE_STURBO_A */ 936 { 2, 4, 10, 64, 0 }, /* IEEE80211_MODE_11NA */ /*XXXcheck*/ 937 { 2, 4, 10, 64, 0 }, /* IEEE80211_MODE_11NG */ /*XXXcheck*/ 938 }; 939 struct ieee80211com *ic = vap->iv_ic; 940 struct ieee80211_wme_state *wme = &ic->ic_wme; 941 const struct wmeParams *wmep; 942 struct wmeParams *chanp, *bssp; 943 enum ieee80211_phymode mode; 944 int i; 945 946 /* set up the channel access parameters for the physical device */ 947 for (i = 0; i < WME_NUM_AC; i++) { 948 chanp = &wme->wme_chanParams.cap_wmeParams[i]; 949 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i]; 950 chanp->wmep_aifsn = wmep->wmep_aifsn; 951 chanp->wmep_logcwmin = wmep->wmep_logcwmin; 952 chanp->wmep_logcwmax = wmep->wmep_logcwmax; 953 chanp->wmep_txopLimit = wmep->wmep_txopLimit; 954 955 chanp = &wme->wme_bssChanParams.cap_wmeParams[i]; 956 wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i]; 957 chanp->wmep_aifsn = wmep->wmep_aifsn; 958 chanp->wmep_logcwmin = wmep->wmep_logcwmin; 959 chanp->wmep_logcwmax = wmep->wmep_logcwmax; 960 chanp->wmep_txopLimit = wmep->wmep_txopLimit; 961 } 962 963 /* 964 * Select mode; we can be called early in which case we 965 * always use auto mode. We know we'll be called when 966 * entering the RUN state with bsschan setup properly 967 * so state will eventually get set correctly 968 */ 969 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC) 970 mode = ieee80211_chan2mode(ic->ic_bsschan); 971 else 972 mode = IEEE80211_MODE_AUTO; 973 974 /* 975 * This implements agressive mode as found in certain 976 * vendors' AP's. When there is significant high 977 * priority (VI/VO) traffic in the BSS throttle back BE 978 * traffic by using conservative parameters. Otherwise 979 * BE uses agressive params to optimize performance of 980 * legacy/non-QoS traffic. 981 */ 982 if ((vap->iv_opmode == IEEE80211_M_HOSTAP && 983 (wme->wme_flags & WME_F_AGGRMODE) != 0) || 984 (vap->iv_opmode == IEEE80211_M_STA && 985 (vap->iv_bss->ni_flags & IEEE80211_NODE_QOS) == 0) || 986 (vap->iv_flags & IEEE80211_F_WME) == 0) { 987 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE]; 988 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE]; 989 990 chanp->wmep_aifsn = bssp->wmep_aifsn = phyParam[mode].aifsn; 991 chanp->wmep_logcwmin = bssp->wmep_logcwmin = 992 phyParam[mode].logcwmin; 993 chanp->wmep_logcwmax = bssp->wmep_logcwmax = 994 phyParam[mode].logcwmax; 995 chanp->wmep_txopLimit = bssp->wmep_txopLimit = 996 (vap->iv_flags & IEEE80211_F_BURST) ? 997 phyParam[mode].txopLimit : 0; 998 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 999 "%s: %s [acm %u aifsn %u log2(cwmin) %u " 1000 "log2(cwmax) %u txpoLimit %u]\n", __func__ 1001 , ieee80211_wme_acnames[WME_AC_BE] 1002 , chanp->wmep_acm 1003 , chanp->wmep_aifsn 1004 , chanp->wmep_logcwmin 1005 , chanp->wmep_logcwmax 1006 , chanp->wmep_txopLimit 1007 ); 1008 } 1009 1010 /* XXX multi-bss */ 1011 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 1012 ic->ic_sta_assoc < 2 && (wme->wme_flags & WME_F_AGGRMODE) != 0) { 1013 static const uint8_t logCwMin[IEEE80211_MODE_MAX] = { 1014 3, /* IEEE80211_MODE_AUTO */ 1015 3, /* IEEE80211_MODE_11A */ 1016 4, /* IEEE80211_MODE_11B */ 1017 3, /* IEEE80211_MODE_11G */ 1018 4, /* IEEE80211_MODE_FH */ 1019 3, /* IEEE80211_MODE_TURBO_A */ 1020 3, /* IEEE80211_MODE_TURBO_G */ 1021 3, /* IEEE80211_MODE_STURBO_A */ 1022 3, /* IEEE80211_MODE_11NA */ 1023 3, /* IEEE80211_MODE_11NG */ 1024 }; 1025 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE]; 1026 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE]; 1027 1028 chanp->wmep_logcwmin = bssp->wmep_logcwmin = logCwMin[mode]; 1029 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 1030 "%s: %s log2(cwmin) %u\n", __func__ 1031 , ieee80211_wme_acnames[WME_AC_BE] 1032 , chanp->wmep_logcwmin 1033 ); 1034 } 1035 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { /* XXX ibss? */ 1036 /* 1037 * Arrange for a beacon update and bump the parameter 1038 * set number so associated stations load the new values. 1039 */ 1040 wme->wme_bssChanParams.cap_info = 1041 (wme->wme_bssChanParams.cap_info+1) & WME_QOSINFO_COUNT; 1042 ieee80211_beacon_notify(vap, IEEE80211_BEACON_WME); 1043 } 1044 1045 wme->wme_update(ic); 1046 1047 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 1048 "%s: WME params updated, cap_info 0x%x\n", __func__, 1049 vap->iv_opmode == IEEE80211_M_STA ? 1050 wme->wme_wmeChanParams.cap_info : 1051 wme->wme_bssChanParams.cap_info); 1052} 1053 1054void 1055ieee80211_wme_updateparams(struct ieee80211vap *vap) 1056{ 1057 struct ieee80211com *ic = vap->iv_ic; 1058 1059 if (ic->ic_caps & IEEE80211_C_WME) { 1060 IEEE80211_LOCK(ic); 1061 ieee80211_wme_updateparams_locked(vap); 1062 IEEE80211_UNLOCK(ic); 1063 } 1064} 1065 1066static void 1067parent_updown(void *arg, int npending) 1068{ 1069 struct ifnet *parent = arg; 1070 1071 parent->if_ioctl(parent, SIOCSIFFLAGS, NULL); 1072} 1073 1074/* 1075 * Start a vap running. If this is the first vap to be 1076 * set running on the underlying device then we 1077 * automatically bring the device up. 1078 */ 1079void 1080ieee80211_start_locked(struct ieee80211vap *vap) 1081{ 1082 struct ifnet *ifp = vap->iv_ifp; 1083 struct ieee80211com *ic = vap->iv_ic; 1084 struct ifnet *parent = ic->ic_ifp; 1085 1086 IEEE80211_LOCK_ASSERT(ic); 1087 1088 IEEE80211_DPRINTF(vap, 1089 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1090 "start running, %d vaps running\n", ic->ic_nrunning); 1091 1092 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) { 1093 /* 1094 * Mark us running. Note that it's ok to do this first; 1095 * if we need to bring the parent device up we defer that 1096 * to avoid dropping the com lock. We expect the device 1097 * to respond to being marked up by calling back into us 1098 * through ieee80211_start_all at which point we'll come 1099 * back in here and complete the work. 1100 */ 1101 ifp->if_drv_flags |= IFF_DRV_RUNNING; 1102 /* 1103 * We are not running; if this we are the first vap 1104 * to be brought up auto-up the parent if necessary. 1105 */ 1106 if (ic->ic_nrunning++ == 0 && 1107 (parent->if_drv_flags & IFF_DRV_RUNNING) == 0) { 1108 IEEE80211_DPRINTF(vap, 1109 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1110 "%s: up parent %s\n", __func__, parent->if_xname); 1111 parent->if_flags |= IFF_UP; 1112 taskqueue_enqueue(taskqueue_thread, &ic->ic_parent_task); 1113 return; 1114 } 1115 } 1116 /* 1117 * If the parent is up and running, then kick the 1118 * 802.11 state machine as appropriate. 1119 */ 1120 if ((parent->if_drv_flags & IFF_DRV_RUNNING) && 1121 vap->iv_roaming != IEEE80211_ROAMING_MANUAL) { 1122 if (vap->iv_opmode == IEEE80211_M_STA) { 1123#if 0 1124 /* XXX bypasses scan too easily; disable for now */ 1125 /* 1126 * Try to be intelligent about clocking the state 1127 * machine. If we're currently in RUN state then 1128 * we should be able to apply any new state/parameters 1129 * simply by re-associating. Otherwise we need to 1130 * re-scan to select an appropriate ap. 1131 */ 1132 if (vap->iv_state >= IEEE80211_S_RUN) 1133 ieee80211_new_state_locked(vap, 1134 IEEE80211_S_ASSOC, 1); 1135 else 1136#endif 1137 ieee80211_new_state_locked(vap, 1138 IEEE80211_S_SCAN, 0); 1139 } else { 1140 /* 1141 * For monitor+wds mode there's nothing to do but 1142 * start running. Otherwise if this is the first 1143 * vap to be brought up, start a scan which may be 1144 * preempted if the station is locked to a particular 1145 * channel. 1146 */ 1147 /* XXX needed? */ 1148 ieee80211_new_state_locked(vap, IEEE80211_S_INIT, 0); 1149 if (vap->iv_opmode == IEEE80211_M_MONITOR || 1150 vap->iv_opmode == IEEE80211_M_WDS) 1151 ieee80211_new_state_locked(vap, 1152 IEEE80211_S_RUN, -1); 1153 else 1154 ieee80211_new_state_locked(vap, 1155 IEEE80211_S_SCAN, 0); 1156 } 1157 } 1158} 1159 1160/* 1161 * Start a single vap. 1162 */ 1163void 1164ieee80211_init(void *arg) 1165{ 1166 struct ieee80211vap *vap = arg; 1167 1168 /* 1169 * This routine is publicly accessible through the vap's 1170 * if_init method so guard against calls during detach. 1171 * ieee80211_vap_detach null's the backpointer before 1172 * tearing down state to signal any callback should be 1173 * rejected/ignored. 1174 */ 1175 if (vap != NULL) { 1176 IEEE80211_DPRINTF(vap, 1177 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1178 "%s\n", __func__); 1179 1180 IEEE80211_LOCK(vap->iv_ic); 1181 ieee80211_start_locked(vap); 1182 IEEE80211_UNLOCK(vap->iv_ic); 1183 } 1184} 1185 1186/* 1187 * Start all runnable vap's on a device. 1188 */ 1189void 1190ieee80211_start_all(struct ieee80211com *ic) 1191{ 1192 struct ieee80211vap *vap; 1193 1194 IEEE80211_LOCK(ic); 1195 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1196 struct ifnet *ifp = vap->iv_ifp; 1197 if (IFNET_IS_UP_RUNNING(ifp)) /* NB: avoid recursion */ 1198 ieee80211_start_locked(vap); 1199 } 1200 IEEE80211_UNLOCK(ic); 1201} 1202 1203/* 1204 * Stop a vap. We force it down using the state machine 1205 * then mark it's ifnet not running. If this is the last 1206 * vap running on the underlying device then we close it 1207 * too to insure it will be properly initialized when the 1208 * next vap is brought up. 1209 */ 1210void 1211ieee80211_stop_locked(struct ieee80211vap *vap) 1212{ 1213 struct ieee80211com *ic = vap->iv_ic; 1214 struct ifnet *ifp = vap->iv_ifp; 1215 struct ifnet *parent = ic->ic_ifp; 1216 1217 IEEE80211_LOCK_ASSERT(ic); 1218 1219 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1220 "stop running, %d vaps running\n", ic->ic_nrunning); 1221 1222 ieee80211_new_state_locked(vap, IEEE80211_S_INIT, -1); 1223 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 1224 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; /* mark us stopped */ 1225 if (--ic->ic_nrunning == 0 && 1226 (parent->if_drv_flags & IFF_DRV_RUNNING)) { 1227 IEEE80211_DPRINTF(vap, 1228 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1229 "down parent %s\n", parent->if_xname); 1230 parent->if_flags &= ~IFF_UP; 1231 taskqueue_enqueue(taskqueue_thread, &ic->ic_parent_task); 1232 } 1233 } 1234} 1235 1236void 1237ieee80211_stop(struct ieee80211vap *vap) 1238{ 1239 struct ieee80211com *ic = vap->iv_ic; 1240 1241 IEEE80211_LOCK(ic); 1242 ieee80211_stop_locked(vap); 1243 IEEE80211_UNLOCK(ic); 1244} 1245 1246/* 1247 * Stop all vap's running on a device. 1248 */ 1249void 1250ieee80211_stop_all(struct ieee80211com *ic) 1251{ 1252 struct ieee80211vap *vap; 1253 1254 IEEE80211_LOCK(ic); 1255 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1256 struct ifnet *ifp = vap->iv_ifp; 1257 if (IFNET_IS_UP_RUNNING(ifp)) /* NB: avoid recursion */ 1258 ieee80211_stop_locked(vap); 1259 } 1260 IEEE80211_UNLOCK(ic); 1261} 1262 1263/* 1264 * Switch between turbo and non-turbo operating modes. 1265 * Use the specified channel flags to locate the new 1266 * channel, update 802.11 state, and then call back into 1267 * the driver to effect the change. 1268 */ 1269void 1270ieee80211_dturbo_switch(struct ieee80211vap *vap, int newflags) 1271{ 1272 struct ieee80211com *ic = vap->iv_ic; 1273 struct ieee80211_channel *chan; 1274 1275 chan = ieee80211_find_channel(ic, ic->ic_bsschan->ic_freq, newflags); 1276 if (chan == NULL) { /* XXX should not happen */ 1277 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG, 1278 "%s: no channel with freq %u flags 0x%x\n", 1279 __func__, ic->ic_bsschan->ic_freq, newflags); 1280 return; 1281 } 1282 1283 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG, 1284 "%s: %s -> %s (freq %u flags 0x%x)\n", __func__, 1285 ieee80211_phymode_name[ieee80211_chan2mode(ic->ic_bsschan)], 1286 ieee80211_phymode_name[ieee80211_chan2mode(chan)], 1287 chan->ic_freq, chan->ic_flags); 1288 1289 ic->ic_bsschan = chan; 1290 ic->ic_prevchan = ic->ic_curchan; 1291 ic->ic_curchan = chan; 1292 ic->ic_set_channel(ic); 1293 /* NB: do not need to reset ERP state 'cuz we're in sta mode */ 1294} 1295 1296void 1297ieee80211_beacon_miss(struct ieee80211com *ic) 1298{ 1299 struct ieee80211vap *vap; 1300 1301 if (ic->ic_flags & IEEE80211_F_SCAN) 1302 return; 1303 /* XXX locking */ 1304 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1305 /* 1306 * We only pass events through for sta vap's in RUN state; 1307 * may be too restrictive but for now this saves all the 1308 * handlers duplicating these checks. 1309 */ 1310 if (vap->iv_opmode == IEEE80211_M_STA && 1311 vap->iv_state == IEEE80211_S_RUN && 1312 vap->iv_bmiss != NULL) 1313 vap->iv_bmiss(vap); 1314 } 1315} 1316 1317/* 1318 * Software beacon miss handling. Check if any beacons 1319 * were received in the last period. If not post a 1320 * beacon miss; otherwise reset the counter. 1321 */ 1322void 1323ieee80211_swbmiss(void *arg) 1324{ 1325 struct ieee80211vap *vap = arg; 1326 1327 if (vap->iv_swbmiss_count == 0) { 1328 if (vap->iv_bmiss != NULL) 1329 vap->iv_bmiss(vap); 1330 if (vap->iv_bmiss_count == 0) /* don't re-arm timer */ 1331 return; 1332 } else 1333 vap->iv_swbmiss_count = 0; 1334 callout_reset(&vap->iv_swbmiss, vap->iv_swbmiss_period, 1335 ieee80211_swbmiss, vap); 1336} 1337 1338/* 1339 * Start an 802.11h channel switch. We record the parameters, 1340 * mark the operation pending, notify each vap through the 1341 * beacon update mechanism so it can update the beacon frame 1342 * contents, and then switch vap's to CSA state to block outbound 1343 * traffic. Devices that handle CSA directly can use the state 1344 * switch to do the right thing so long as they call 1345 * ieee80211_csa_completeswitch when it's time to complete the 1346 * channel change. Devices that depend on the net80211 layer can 1347 * use ieee80211_beacon_update to handle the countdown and the 1348 * channel switch. 1349 */ 1350void 1351ieee80211_csa_startswitch(struct ieee80211com *ic, 1352 struct ieee80211_channel *c, int mode, int count) 1353{ 1354 struct ieee80211vap *vap; 1355 1356 IEEE80211_LOCK_ASSERT(ic); 1357 1358 ic->ic_csa_newchan = c; 1359 ic->ic_csa_count = count; 1360 /* XXX record mode? */ 1361 ic->ic_flags |= IEEE80211_F_CSAPENDING; 1362 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1363 if (vap->iv_opmode == IEEE80211_M_HOSTAP || 1364 vap->iv_opmode == IEEE80211_M_IBSS) 1365 ieee80211_beacon_notify(vap, IEEE80211_BEACON_CSA); 1366 /* switch to CSA state to block outbound traffic */ 1367 if (vap->iv_state == IEEE80211_S_RUN) 1368 ieee80211_new_state_locked(vap, IEEE80211_S_CSA, 0); 1369 } 1370 ieee80211_notify_csa(ic, c, mode, count); 1371} 1372 1373/* 1374 * Complete an 802.11h channel switch started by ieee80211_csa_startswitch. 1375 * We clear state and move all vap's in CSA state to RUN state 1376 * so they can again transmit. 1377 */ 1378void 1379ieee80211_csa_completeswitch(struct ieee80211com *ic) 1380{ 1381 struct ieee80211vap *vap; 1382 1383 IEEE80211_LOCK_ASSERT(ic); 1384 1385 KASSERT(ic->ic_flags & IEEE80211_F_CSAPENDING, ("csa not pending")); 1386 1387 ieee80211_setcurchan(ic, ic->ic_csa_newchan); 1388 ic->ic_csa_newchan = NULL; 1389 ic->ic_flags &= ~IEEE80211_F_CSAPENDING; 1390 1391 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1392 if (vap->iv_state == IEEE80211_S_CSA) 1393 ieee80211_new_state_locked(vap, IEEE80211_S_RUN, 0); 1394} 1395 1396/* 1397 * Complete a DFS CAC started by ieee80211_dfs_cac_start. 1398 * We clear state and move all vap's in CAC state to RUN state. 1399 */ 1400void 1401ieee80211_cac_completeswitch(struct ieee80211vap *vap0) 1402{ 1403 struct ieee80211com *ic = vap0->iv_ic; 1404 struct ieee80211vap *vap; 1405 1406 IEEE80211_LOCK(ic); 1407 /* 1408 * Complete CAC state change for lead vap first; then 1409 * clock all the other vap's waiting. 1410 */ 1411 KASSERT(vap0->iv_state == IEEE80211_S_CAC, 1412 ("wrong state %d", vap0->iv_state)); 1413 ieee80211_new_state_locked(vap0, IEEE80211_S_RUN, 0); 1414 1415 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1416 if (vap->iv_state == IEEE80211_S_CAC) 1417 ieee80211_new_state_locked(vap, IEEE80211_S_RUN, 0); 1418 IEEE80211_UNLOCK(ic); 1419} 1420 1421/* 1422 * Force all vap's other than the specified vap to the INIT state 1423 * and mark them as waiting for a scan to complete. These vaps 1424 * will be brought up when the scan completes and the scanning vap 1425 * reaches RUN state by wakeupwaiting. 1426 * XXX if we do this in threads we can use sleep/wakeup. 1427 */ 1428static void 1429markwaiting(struct ieee80211vap *vap0) 1430{ 1431 struct ieee80211com *ic = vap0->iv_ic; 1432 struct ieee80211vap *vap; 1433 1434 IEEE80211_LOCK_ASSERT(ic); 1435 1436 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1437 if (vap == vap0) 1438 continue; 1439 if (vap->iv_state != IEEE80211_S_INIT) { 1440 vap->iv_newstate(vap, IEEE80211_S_INIT, 0); 1441 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT; 1442 } 1443 } 1444} 1445 1446/* 1447 * Wakeup all vap's waiting for a scan to complete. This is the 1448 * companion to markwaiting (above) and is used to coordinate 1449 * multiple vaps scanning. 1450 */ 1451static void 1452wakeupwaiting(struct ieee80211vap *vap0) 1453{ 1454 struct ieee80211com *ic = vap0->iv_ic; 1455 struct ieee80211vap *vap; 1456 1457 IEEE80211_LOCK_ASSERT(ic); 1458 1459 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1460 if (vap == vap0) 1461 continue; 1462 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANWAIT) { 1463 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANWAIT; 1464 /* NB: sta's cannot go INIT->RUN */ 1465 vap->iv_newstate(vap, 1466 vap->iv_opmode == IEEE80211_M_STA ? 1467 IEEE80211_S_SCAN : IEEE80211_S_RUN, 0); 1468 } 1469 } 1470} 1471 1472/* 1473 * Handle post state change work common to all operating modes. 1474 */ 1475static void 1476ieee80211_newstate_cb(struct ieee80211vap *vap, 1477 enum ieee80211_state nstate, int arg) 1478{ 1479 struct ieee80211com *ic = vap->iv_ic; 1480 1481 IEEE80211_LOCK_ASSERT(ic); 1482 1483 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1484 "%s: %s arg %d\n", __func__, ieee80211_state_name[nstate], arg); 1485 1486 if (nstate == IEEE80211_S_RUN) { 1487 /* 1488 * OACTIVE may be set on the vap if the upper layer 1489 * tried to transmit (e.g. IPv6 NDP) before we reach 1490 * RUN state. Clear it and restart xmit. 1491 * 1492 * Note this can also happen as a result of SLEEP->RUN 1493 * (i.e. coming out of power save mode). 1494 */ 1495 vap->iv_ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 1496 if_start(vap->iv_ifp); 1497 1498 /* bring up any vaps waiting on us */ 1499 wakeupwaiting(vap); 1500 } else if (nstate == IEEE80211_S_INIT) { 1501 /* 1502 * Flush the scan cache if we did the last scan (XXX?) 1503 * and flush any frames on send queues from this vap. 1504 * Note the mgt q is used only for legacy drivers and 1505 * will go away shortly. 1506 */ 1507 ieee80211_scan_flush(vap); 1508 1509 /* XXX NB: cast for altq */ 1510 ieee80211_flush_ifq((struct ifqueue *)&ic->ic_ifp->if_snd, vap); 1511 } 1512 vap->iv_newstate_cb = NULL; 1513} 1514 1515/* 1516 * Public interface for initiating a state machine change. 1517 * This routine single-threads the request and coordinates 1518 * the scheduling of multiple vaps for the purpose of selecting 1519 * an operating channel. Specifically the following scenarios 1520 * are handled: 1521 * o only one vap can be selecting a channel so on transition to 1522 * SCAN state if another vap is already scanning then 1523 * mark the caller for later processing and return without 1524 * doing anything (XXX? expectations by caller of synchronous operation) 1525 * o only one vap can be doing CAC of a channel so on transition to 1526 * CAC state if another vap is already scanning for radar then 1527 * mark the caller for later processing and return without 1528 * doing anything (XXX? expectations by caller of synchronous operation) 1529 * o if another vap is already running when a request is made 1530 * to SCAN then an operating channel has been chosen; bypass 1531 * the scan and just join the channel 1532 * 1533 * Note that the state change call is done through the iv_newstate 1534 * method pointer so any driver routine gets invoked. The driver 1535 * will normally call back into operating mode-specific 1536 * ieee80211_newstate routines (below) unless it needs to completely 1537 * bypass the state machine (e.g. because the firmware has it's 1538 * own idea how things should work). Bypassing the net80211 layer 1539 * is usually a mistake and indicates lack of proper integration 1540 * with the net80211 layer. 1541 */ 1542static int 1543ieee80211_new_state_locked(struct ieee80211vap *vap, 1544 enum ieee80211_state nstate, int arg) 1545{ 1546 struct ieee80211com *ic = vap->iv_ic; 1547 struct ieee80211vap *vp; 1548 enum ieee80211_state ostate; 1549 int nrunning, nscanning, rc; 1550 1551 IEEE80211_LOCK_ASSERT(ic); 1552 1553 nrunning = nscanning = 0; 1554 /* XXX can track this state instead of calculating */ 1555 TAILQ_FOREACH(vp, &ic->ic_vaps, iv_next) { 1556 if (vp != vap) { 1557 if (vp->iv_state >= IEEE80211_S_RUN) 1558 nrunning++; 1559 /* XXX doesn't handle bg scan */ 1560 /* NB: CAC+AUTH+ASSOC treated like SCAN */ 1561 else if (vp->iv_state > IEEE80211_S_INIT) 1562 nscanning++; 1563 } 1564 } 1565 ostate = vap->iv_state; 1566 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1567 "%s: %s -> %s (nrunning %d nscanning %d)\n", __func__, 1568 ieee80211_state_name[ostate], ieee80211_state_name[nstate], 1569 nrunning, nscanning); 1570 switch (nstate) { 1571 case IEEE80211_S_SCAN: 1572 if (ostate == IEEE80211_S_INIT) { 1573 /* 1574 * INIT -> SCAN happens on initial bringup. 1575 */ 1576 KASSERT(!(nscanning && nrunning), 1577 ("%d scanning and %d running", nscanning, nrunning)); 1578 if (nscanning) { 1579 /* 1580 * Someone is scanning, defer our state 1581 * change until the work has completed. 1582 */ 1583 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1584 "%s: defer %s -> %s\n", 1585 __func__, ieee80211_state_name[ostate], 1586 ieee80211_state_name[nstate]); 1587 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT; 1588 rc = 0; 1589 goto done; 1590 } 1591 if (nrunning) { 1592 /* 1593 * Someone is operating; just join the channel 1594 * they have chosen. 1595 */ 1596 /* XXX kill arg? */ 1597 /* XXX check each opmode, adhoc? */ 1598 if (vap->iv_opmode == IEEE80211_M_STA) 1599 nstate = IEEE80211_S_SCAN; 1600 else 1601 nstate = IEEE80211_S_RUN; 1602#ifdef IEEE80211_DEBUG 1603 if (nstate != IEEE80211_S_SCAN) { 1604 IEEE80211_DPRINTF(vap, 1605 IEEE80211_MSG_STATE, 1606 "%s: override, now %s -> %s\n", 1607 __func__, 1608 ieee80211_state_name[ostate], 1609 ieee80211_state_name[nstate]); 1610 } 1611#endif 1612 } 1613 } else { 1614 /* 1615 * SCAN was forced; e.g. on beacon miss. Force 1616 * other running vap's to INIT state and mark 1617 * them as waiting for the scan to complete. This 1618 * insures they don't interfere with our scanning. 1619 * 1620 * XXX not always right, assumes ap follows sta 1621 */ 1622 markwaiting(vap); 1623 } 1624 break; 1625 case IEEE80211_S_RUN: 1626 if (vap->iv_opmode == IEEE80211_M_WDS && 1627 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) && 1628 nscanning) { 1629 /* 1630 * Legacy WDS with someone else scanning; don't 1631 * go online until that completes as we should 1632 * follow the other vap to the channel they choose. 1633 */ 1634 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1635 "%s: defer %s -> %s (legacy WDS)\n", __func__, 1636 ieee80211_state_name[ostate], 1637 ieee80211_state_name[nstate]); 1638 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT; 1639 rc = 0; 1640 goto done; 1641 } 1642 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 1643 IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) && 1644 (vap->iv_flags_ext & IEEE80211_FEXT_DFS) && 1645 !IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) { 1646 /* 1647 * This is a DFS channel, transition to CAC state 1648 * instead of RUN. This allows us to initiate 1649 * Channel Availability Check (CAC) as specified 1650 * by 11h/DFS. 1651 */ 1652 nstate = IEEE80211_S_CAC; 1653 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1654 "%s: override %s -> %s (DFS)\n", __func__, 1655 ieee80211_state_name[ostate], 1656 ieee80211_state_name[nstate]); 1657 } 1658 break; 1659 case IEEE80211_S_INIT: 1660 if (ostate == IEEE80211_S_INIT ) { 1661 /* XXX don't believe this */ 1662 /* INIT -> INIT. nothing to do */ 1663 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANWAIT; 1664 } 1665 /* fall thru... */ 1666 default: 1667 break; 1668 } 1669 /* XXX on transition RUN->CAC do we need to set nstate = iv_state? */ 1670 if (ostate != nstate) { 1671 /* 1672 * Arrange for work to happen after state change completes. 1673 * If this happens asynchronously the caller must arrange 1674 * for the com lock to be held. 1675 */ 1676 vap->iv_newstate_cb = ieee80211_newstate_cb; 1677 } 1678 rc = vap->iv_newstate(vap, nstate, arg); 1679 if (rc == 0 && vap->iv_newstate_cb != NULL) 1680 vap->iv_newstate_cb(vap, nstate, arg); 1681done: 1682 return rc; 1683} 1684 1685int 1686ieee80211_new_state(struct ieee80211vap *vap, 1687 enum ieee80211_state nstate, int arg) 1688{ 1689 struct ieee80211com *ic = vap->iv_ic; 1690 int rc; 1691 1692 IEEE80211_LOCK(ic); 1693 rc = ieee80211_new_state_locked(vap, nstate, arg); 1694 IEEE80211_UNLOCK(ic); 1695 return rc; 1696} 1697