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("$FreeBSD$"); 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 41#include <sys/socket.h> 42#include <sys/sockio.h> 43 44#include <net/if.h> 45#include <net/if_media.h> 46#include <net/ethernet.h> /* XXX for ether_sprintf */ 47 48#include <net80211/ieee80211_var.h> 49#include <net80211/ieee80211_adhoc.h> 50#include <net80211/ieee80211_sta.h> 51#include <net80211/ieee80211_hostap.h> 52#include <net80211/ieee80211_wds.h> 53#ifdef IEEE80211_SUPPORT_MESH 54#include <net80211/ieee80211_mesh.h> 55#endif 56#include <net80211/ieee80211_monitor.h> 57#include <net80211/ieee80211_input.h> 58 59/* XXX tunables */ 60#define AGGRESSIVE_MODE_SWITCH_HYSTERESIS 3 /* pkts / 100ms */ 61#define HIGH_PRI_SWITCH_THRESH 10 /* pkts / 100ms */ 62 63const char *ieee80211_mgt_subtype_name[] = { 64 "assoc_req", "assoc_resp", "reassoc_req", "reassoc_resp", 65 "probe_req", "probe_resp", "reserved#6", "reserved#7", 66 "beacon", "atim", "disassoc", "auth", 67 "deauth", "action", "action_noack", "reserved#15" 68}; 69const char *ieee80211_ctl_subtype_name[] = { 70 "reserved#0", "reserved#1", "reserved#2", "reserved#3", 71 "reserved#3", "reserved#5", "reserved#6", "reserved#7", 72 "reserved#8", "reserved#9", "ps_poll", "rts", 73 "cts", "ack", "cf_end", "cf_end_ack" 74}; 75const char *ieee80211_opmode_name[IEEE80211_OPMODE_MAX] = { 76 "IBSS", /* IEEE80211_M_IBSS */ 77 "STA", /* IEEE80211_M_STA */ 78 "WDS", /* IEEE80211_M_WDS */ 79 "AHDEMO", /* IEEE80211_M_AHDEMO */ 80 "HOSTAP", /* IEEE80211_M_HOSTAP */ 81 "MONITOR", /* IEEE80211_M_MONITOR */ 82 "MBSS" /* IEEE80211_M_MBSS */ 83}; 84const char *ieee80211_state_name[IEEE80211_S_MAX] = { 85 "INIT", /* IEEE80211_S_INIT */ 86 "SCAN", /* IEEE80211_S_SCAN */ 87 "AUTH", /* IEEE80211_S_AUTH */ 88 "ASSOC", /* IEEE80211_S_ASSOC */ 89 "CAC", /* IEEE80211_S_CAC */ 90 "RUN", /* IEEE80211_S_RUN */ 91 "CSA", /* IEEE80211_S_CSA */ 92 "SLEEP", /* IEEE80211_S_SLEEP */ 93}; 94const char *ieee80211_wme_acnames[] = { 95 "WME_AC_BE", 96 "WME_AC_BK", 97 "WME_AC_VI", 98 "WME_AC_VO", 99 "WME_UPSD", 100}; 101 102static void beacon_miss(void *, int); 103static void beacon_swmiss(void *, int); 104static void parent_updown(void *, int); 105static void update_mcast(void *, int); 106static void update_promisc(void *, int); 107static void update_channel(void *, int); 108static void update_chw(void *, int); 109static void ieee80211_newstate_cb(void *, int); 110 111static int 112null_raw_xmit(struct ieee80211_node *ni, struct mbuf *m, 113 const struct ieee80211_bpf_params *params) 114{ 115 struct ifnet *ifp = ni->ni_ic->ic_ifp; 116 117 if_printf(ifp, "missing ic_raw_xmit callback, drop frame\n"); 118 m_freem(m); 119 return ENETDOWN; 120} 121 122void 123ieee80211_proto_attach(struct ieee80211com *ic) 124{ 125 struct ifnet *ifp = ic->ic_ifp; 126 127 /* override the 802.3 setting */ 128 ifp->if_hdrlen = ic->ic_headroom 129 + sizeof(struct ieee80211_qosframe_addr4) 130 + IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN 131 + IEEE80211_WEP_EXTIVLEN; 132 /* XXX no way to recalculate on ifdetach */ 133 if (ALIGN(ifp->if_hdrlen) > max_linkhdr) { 134 /* XXX sanity check... */ 135 max_linkhdr = ALIGN(ifp->if_hdrlen); 136 max_hdr = max_linkhdr + max_protohdr; 137 max_datalen = MHLEN - max_hdr; 138 } 139 ic->ic_protmode = IEEE80211_PROT_CTSONLY; 140 141 TASK_INIT(&ic->ic_parent_task, 0, parent_updown, ifp); 142 TASK_INIT(&ic->ic_mcast_task, 0, update_mcast, ic); 143 TASK_INIT(&ic->ic_promisc_task, 0, update_promisc, ic); 144 TASK_INIT(&ic->ic_chan_task, 0, update_channel, ic); 145 TASK_INIT(&ic->ic_bmiss_task, 0, beacon_miss, ic); 146 TASK_INIT(&ic->ic_chw_task, 0, update_chw, ic); 147 148 ic->ic_wme.wme_hipri_switch_hysteresis = 149 AGGRESSIVE_MODE_SWITCH_HYSTERESIS; 150 151 /* initialize management frame handlers */ 152 ic->ic_send_mgmt = ieee80211_send_mgmt; 153 ic->ic_raw_xmit = null_raw_xmit; 154 155 ieee80211_adhoc_attach(ic); 156 ieee80211_sta_attach(ic); 157 ieee80211_wds_attach(ic); 158 ieee80211_hostap_attach(ic); 159#ifdef IEEE80211_SUPPORT_MESH 160 ieee80211_mesh_attach(ic); 161#endif 162 ieee80211_monitor_attach(ic); 163} 164 165void 166ieee80211_proto_detach(struct ieee80211com *ic) 167{ 168 ieee80211_monitor_detach(ic); 169#ifdef IEEE80211_SUPPORT_MESH 170 ieee80211_mesh_detach(ic); 171#endif 172 ieee80211_hostap_detach(ic); 173 ieee80211_wds_detach(ic); 174 ieee80211_adhoc_detach(ic); 175 ieee80211_sta_detach(ic); 176} 177 178static void 179null_update_beacon(struct ieee80211vap *vap, int item) 180{ 181} 182 183void 184ieee80211_proto_vattach(struct ieee80211vap *vap) 185{ 186 struct ieee80211com *ic = vap->iv_ic; 187 struct ifnet *ifp = vap->iv_ifp; 188 int i; 189 190 /* override the 802.3 setting */ 191 ifp->if_hdrlen = ic->ic_ifp->if_hdrlen; 192 193 vap->iv_rtsthreshold = IEEE80211_RTS_DEFAULT; 194 vap->iv_fragthreshold = IEEE80211_FRAG_DEFAULT; 195 vap->iv_bmiss_max = IEEE80211_BMISS_MAX; 196 callout_init_mtx(&vap->iv_swbmiss, IEEE80211_LOCK_OBJ(ic), 0); 197 callout_init(&vap->iv_mgtsend, CALLOUT_MPSAFE); 198 TASK_INIT(&vap->iv_nstate_task, 0, ieee80211_newstate_cb, vap); 199 TASK_INIT(&vap->iv_swbmiss_task, 0, beacon_swmiss, vap); 200 /* 201 * Install default tx rate handling: no fixed rate, lowest 202 * supported rate for mgmt and multicast frames. Default 203 * max retry count. These settings can be changed by the 204 * driver and/or user applications. 205 */ 206 for (i = IEEE80211_MODE_11A; i < IEEE80211_MODE_MAX; i++) { 207 const struct ieee80211_rateset *rs = &ic->ic_sup_rates[i]; 208 209 vap->iv_txparms[i].ucastrate = IEEE80211_FIXED_RATE_NONE; 210 211 /* 212 * Setting the management rate to MCS 0 assumes that the 213 * BSS Basic rate set is empty and the BSS Basic MCS set 214 * is not. 215 * 216 * Since we're not checking this, default to the lowest 217 * defined rate for this mode. 218 * 219 * At least one 11n AP (DLINK DIR-825) is reported to drop 220 * some MCS management traffic (eg BA response frames.) 221 * 222 * See also: 9.6.0 of the 802.11n-2009 specification. 223 */ 224#ifdef NOTYET 225 if (i == IEEE80211_MODE_11NA || i == IEEE80211_MODE_11NG) { 226 vap->iv_txparms[i].mgmtrate = 0 | IEEE80211_RATE_MCS; 227 vap->iv_txparms[i].mcastrate = 0 | IEEE80211_RATE_MCS; 228 } else { 229 vap->iv_txparms[i].mgmtrate = 230 rs->rs_rates[0] & IEEE80211_RATE_VAL; 231 vap->iv_txparms[i].mcastrate = 232 rs->rs_rates[0] & IEEE80211_RATE_VAL; 233 } 234#endif 235 vap->iv_txparms[i].mgmtrate = rs->rs_rates[0] & IEEE80211_RATE_VAL; 236 vap->iv_txparms[i].mcastrate = rs->rs_rates[0] & IEEE80211_RATE_VAL; 237 vap->iv_txparms[i].maxretry = IEEE80211_TXMAX_DEFAULT; 238 } 239 vap->iv_roaming = IEEE80211_ROAMING_AUTO; 240 241 vap->iv_update_beacon = null_update_beacon; 242 vap->iv_deliver_data = ieee80211_deliver_data; 243 244 /* attach support for operating mode */ 245 ic->ic_vattach[vap->iv_opmode](vap); 246} 247 248void 249ieee80211_proto_vdetach(struct ieee80211vap *vap) 250{ 251#define FREEAPPIE(ie) do { \ 252 if (ie != NULL) \ 253 free(ie, M_80211_NODE_IE); \ 254} while (0) 255 /* 256 * Detach operating mode module. 257 */ 258 if (vap->iv_opdetach != NULL) 259 vap->iv_opdetach(vap); 260 /* 261 * This should not be needed as we detach when reseting 262 * the state but be conservative here since the 263 * authenticator may do things like spawn kernel threads. 264 */ 265 if (vap->iv_auth->ia_detach != NULL) 266 vap->iv_auth->ia_detach(vap); 267 /* 268 * Detach any ACL'ator. 269 */ 270 if (vap->iv_acl != NULL) 271 vap->iv_acl->iac_detach(vap); 272 273 FREEAPPIE(vap->iv_appie_beacon); 274 FREEAPPIE(vap->iv_appie_probereq); 275 FREEAPPIE(vap->iv_appie_proberesp); 276 FREEAPPIE(vap->iv_appie_assocreq); 277 FREEAPPIE(vap->iv_appie_assocresp); 278 FREEAPPIE(vap->iv_appie_wpa); 279#undef FREEAPPIE 280} 281 282/* 283 * Simple-minded authenticator module support. 284 */ 285 286#define IEEE80211_AUTH_MAX (IEEE80211_AUTH_WPA+1) 287/* XXX well-known names */ 288static const char *auth_modnames[IEEE80211_AUTH_MAX] = { 289 "wlan_internal", /* IEEE80211_AUTH_NONE */ 290 "wlan_internal", /* IEEE80211_AUTH_OPEN */ 291 "wlan_internal", /* IEEE80211_AUTH_SHARED */ 292 "wlan_xauth", /* IEEE80211_AUTH_8021X */ 293 "wlan_internal", /* IEEE80211_AUTH_AUTO */ 294 "wlan_xauth", /* IEEE80211_AUTH_WPA */ 295}; 296static const struct ieee80211_authenticator *authenticators[IEEE80211_AUTH_MAX]; 297 298static const struct ieee80211_authenticator auth_internal = { 299 .ia_name = "wlan_internal", 300 .ia_attach = NULL, 301 .ia_detach = NULL, 302 .ia_node_join = NULL, 303 .ia_node_leave = NULL, 304}; 305 306/* 307 * Setup internal authenticators once; they are never unregistered. 308 */ 309static void 310ieee80211_auth_setup(void) 311{ 312 ieee80211_authenticator_register(IEEE80211_AUTH_OPEN, &auth_internal); 313 ieee80211_authenticator_register(IEEE80211_AUTH_SHARED, &auth_internal); 314 ieee80211_authenticator_register(IEEE80211_AUTH_AUTO, &auth_internal); 315} 316SYSINIT(wlan_auth, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_auth_setup, NULL); 317 318const struct ieee80211_authenticator * 319ieee80211_authenticator_get(int auth) 320{ 321 if (auth >= IEEE80211_AUTH_MAX) 322 return NULL; 323 if (authenticators[auth] == NULL) 324 ieee80211_load_module(auth_modnames[auth]); 325 return authenticators[auth]; 326} 327 328void 329ieee80211_authenticator_register(int type, 330 const struct ieee80211_authenticator *auth) 331{ 332 if (type >= IEEE80211_AUTH_MAX) 333 return; 334 authenticators[type] = auth; 335} 336 337void 338ieee80211_authenticator_unregister(int type) 339{ 340 341 if (type >= IEEE80211_AUTH_MAX) 342 return; 343 authenticators[type] = NULL; 344} 345 346/* 347 * Very simple-minded ACL module support. 348 */ 349/* XXX just one for now */ 350static const struct ieee80211_aclator *acl = NULL; 351 352void 353ieee80211_aclator_register(const struct ieee80211_aclator *iac) 354{ 355 printf("wlan: %s acl policy registered\n", iac->iac_name); 356 acl = iac; 357} 358 359void 360ieee80211_aclator_unregister(const struct ieee80211_aclator *iac) 361{ 362 if (acl == iac) 363 acl = NULL; 364 printf("wlan: %s acl policy unregistered\n", iac->iac_name); 365} 366 367const struct ieee80211_aclator * 368ieee80211_aclator_get(const char *name) 369{ 370 if (acl == NULL) 371 ieee80211_load_module("wlan_acl"); 372 return acl != NULL && strcmp(acl->iac_name, name) == 0 ? acl : NULL; 373} 374 375void 376ieee80211_print_essid(const uint8_t *essid, int len) 377{ 378 const uint8_t *p; 379 int i; 380 381 if (len > IEEE80211_NWID_LEN) 382 len = IEEE80211_NWID_LEN; 383 /* determine printable or not */ 384 for (i = 0, p = essid; i < len; i++, p++) { 385 if (*p < ' ' || *p > 0x7e) 386 break; 387 } 388 if (i == len) { 389 printf("\""); 390 for (i = 0, p = essid; i < len; i++, p++) 391 printf("%c", *p); 392 printf("\""); 393 } else { 394 printf("0x"); 395 for (i = 0, p = essid; i < len; i++, p++) 396 printf("%02x", *p); 397 } 398} 399 400void 401ieee80211_dump_pkt(struct ieee80211com *ic, 402 const uint8_t *buf, int len, int rate, int rssi) 403{ 404 const struct ieee80211_frame *wh; 405 int i; 406 407 wh = (const struct ieee80211_frame *)buf; 408 switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) { 409 case IEEE80211_FC1_DIR_NODS: 410 printf("NODS %s", ether_sprintf(wh->i_addr2)); 411 printf("->%s", ether_sprintf(wh->i_addr1)); 412 printf("(%s)", ether_sprintf(wh->i_addr3)); 413 break; 414 case IEEE80211_FC1_DIR_TODS: 415 printf("TODS %s", ether_sprintf(wh->i_addr2)); 416 printf("->%s", ether_sprintf(wh->i_addr3)); 417 printf("(%s)", ether_sprintf(wh->i_addr1)); 418 break; 419 case IEEE80211_FC1_DIR_FROMDS: 420 printf("FRDS %s", ether_sprintf(wh->i_addr3)); 421 printf("->%s", ether_sprintf(wh->i_addr1)); 422 printf("(%s)", ether_sprintf(wh->i_addr2)); 423 break; 424 case IEEE80211_FC1_DIR_DSTODS: 425 printf("DSDS %s", ether_sprintf((const uint8_t *)&wh[1])); 426 printf("->%s", ether_sprintf(wh->i_addr3)); 427 printf("(%s", ether_sprintf(wh->i_addr2)); 428 printf("->%s)", ether_sprintf(wh->i_addr1)); 429 break; 430 } 431 switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) { 432 case IEEE80211_FC0_TYPE_DATA: 433 printf(" data"); 434 break; 435 case IEEE80211_FC0_TYPE_MGT: 436 printf(" %s", ieee80211_mgt_subtype_name[ 437 (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) 438 >> IEEE80211_FC0_SUBTYPE_SHIFT]); 439 break; 440 default: 441 printf(" type#%d", wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK); 442 break; 443 } 444 if (IEEE80211_QOS_HAS_SEQ(wh)) { 445 const struct ieee80211_qosframe *qwh = 446 (const struct ieee80211_qosframe *)buf; 447 printf(" QoS [TID %u%s]", qwh->i_qos[0] & IEEE80211_QOS_TID, 448 qwh->i_qos[0] & IEEE80211_QOS_ACKPOLICY ? " ACM" : ""); 449 } 450 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 451 int off; 452 453 off = ieee80211_anyhdrspace(ic, wh); 454 printf(" WEP [IV %.02x %.02x %.02x", 455 buf[off+0], buf[off+1], buf[off+2]); 456 if (buf[off+IEEE80211_WEP_IVLEN] & IEEE80211_WEP_EXTIV) 457 printf(" %.02x %.02x %.02x", 458 buf[off+4], buf[off+5], buf[off+6]); 459 printf(" KID %u]", buf[off+IEEE80211_WEP_IVLEN] >> 6); 460 } 461 if (rate >= 0) 462 printf(" %dM", rate / 2); 463 if (rssi >= 0) 464 printf(" +%d", rssi); 465 printf("\n"); 466 if (len > 0) { 467 for (i = 0; i < len; i++) { 468 if ((i & 1) == 0) 469 printf(" "); 470 printf("%02x", buf[i]); 471 } 472 printf("\n"); 473 } 474} 475 476static __inline int 477findrix(const struct ieee80211_rateset *rs, int r) 478{ 479 int i; 480 481 for (i = 0; i < rs->rs_nrates; i++) 482 if ((rs->rs_rates[i] & IEEE80211_RATE_VAL) == r) 483 return i; 484 return -1; 485} 486 487int 488ieee80211_fix_rate(struct ieee80211_node *ni, 489 struct ieee80211_rateset *nrs, int flags) 490{ 491#define RV(v) ((v) & IEEE80211_RATE_VAL) 492 struct ieee80211vap *vap = ni->ni_vap; 493 struct ieee80211com *ic = ni->ni_ic; 494 int i, j, rix, error; 495 int okrate, badrate, fixedrate, ucastrate; 496 const struct ieee80211_rateset *srs; 497 uint8_t r; 498 499 error = 0; 500 okrate = badrate = 0; 501 ucastrate = vap->iv_txparms[ieee80211_chan2mode(ni->ni_chan)].ucastrate; 502 if (ucastrate != IEEE80211_FIXED_RATE_NONE) { 503 /* 504 * Workaround awkwardness with fixed rate. We are called 505 * to check both the legacy rate set and the HT rate set 506 * but we must apply any legacy fixed rate check only to the 507 * legacy rate set and vice versa. We cannot tell what type 508 * of rate set we've been given (legacy or HT) but we can 509 * distinguish the fixed rate type (MCS have 0x80 set). 510 * So to deal with this the caller communicates whether to 511 * check MCS or legacy rate using the flags and we use the 512 * type of any fixed rate to avoid applying an MCS to a 513 * legacy rate and vice versa. 514 */ 515 if (ucastrate & 0x80) { 516 if (flags & IEEE80211_F_DOFRATE) 517 flags &= ~IEEE80211_F_DOFRATE; 518 } else if ((ucastrate & 0x80) == 0) { 519 if (flags & IEEE80211_F_DOFMCS) 520 flags &= ~IEEE80211_F_DOFMCS; 521 } 522 /* NB: required to make MCS match below work */ 523 ucastrate &= IEEE80211_RATE_VAL; 524 } 525 fixedrate = IEEE80211_FIXED_RATE_NONE; 526 /* 527 * XXX we are called to process both MCS and legacy rates; 528 * we must use the appropriate basic rate set or chaos will 529 * ensue; for now callers that want MCS must supply 530 * IEEE80211_F_DOBRS; at some point we'll need to split this 531 * function so there are two variants, one for MCS and one 532 * for legacy rates. 533 */ 534 if (flags & IEEE80211_F_DOBRS) 535 srs = (const struct ieee80211_rateset *) 536 ieee80211_get_suphtrates(ic, ni->ni_chan); 537 else 538 srs = ieee80211_get_suprates(ic, ni->ni_chan); 539 for (i = 0; i < nrs->rs_nrates; ) { 540 if (flags & IEEE80211_F_DOSORT) { 541 /* 542 * Sort rates. 543 */ 544 for (j = i + 1; j < nrs->rs_nrates; j++) { 545 if (RV(nrs->rs_rates[i]) > RV(nrs->rs_rates[j])) { 546 r = nrs->rs_rates[i]; 547 nrs->rs_rates[i] = nrs->rs_rates[j]; 548 nrs->rs_rates[j] = r; 549 } 550 } 551 } 552 r = nrs->rs_rates[i] & IEEE80211_RATE_VAL; 553 badrate = r; 554 /* 555 * Check for fixed rate. 556 */ 557 if (r == ucastrate) 558 fixedrate = r; 559 /* 560 * Check against supported rates. 561 */ 562 rix = findrix(srs, r); 563 if (flags & IEEE80211_F_DONEGO) { 564 if (rix < 0) { 565 /* 566 * A rate in the node's rate set is not 567 * supported. If this is a basic rate and we 568 * are operating as a STA then this is an error. 569 * Otherwise we just discard/ignore the rate. 570 */ 571 if ((flags & IEEE80211_F_JOIN) && 572 (nrs->rs_rates[i] & IEEE80211_RATE_BASIC)) 573 error++; 574 } else if ((flags & IEEE80211_F_JOIN) == 0) { 575 /* 576 * Overwrite with the supported rate 577 * value so any basic rate bit is set. 578 */ 579 nrs->rs_rates[i] = srs->rs_rates[rix]; 580 } 581 } 582 if ((flags & IEEE80211_F_DODEL) && rix < 0) { 583 /* 584 * Delete unacceptable rates. 585 */ 586 nrs->rs_nrates--; 587 for (j = i; j < nrs->rs_nrates; j++) 588 nrs->rs_rates[j] = nrs->rs_rates[j + 1]; 589 nrs->rs_rates[j] = 0; 590 continue; 591 } 592 if (rix >= 0) 593 okrate = nrs->rs_rates[i]; 594 i++; 595 } 596 if (okrate == 0 || error != 0 || 597 ((flags & (IEEE80211_F_DOFRATE|IEEE80211_F_DOFMCS)) && 598 fixedrate != ucastrate)) { 599 IEEE80211_NOTE(vap, IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni, 600 "%s: flags 0x%x okrate %d error %d fixedrate 0x%x " 601 "ucastrate %x\n", __func__, fixedrate, ucastrate, flags); 602 return badrate | IEEE80211_RATE_BASIC; 603 } else 604 return RV(okrate); 605#undef RV 606} 607 608/* 609 * Reset 11g-related state. 610 */ 611void 612ieee80211_reset_erp(struct ieee80211com *ic) 613{ 614 ic->ic_flags &= ~IEEE80211_F_USEPROT; 615 ic->ic_nonerpsta = 0; 616 ic->ic_longslotsta = 0; 617 /* 618 * Short slot time is enabled only when operating in 11g 619 * and not in an IBSS. We must also honor whether or not 620 * the driver is capable of doing it. 621 */ 622 ieee80211_set_shortslottime(ic, 623 IEEE80211_IS_CHAN_A(ic->ic_curchan) || 624 IEEE80211_IS_CHAN_HT(ic->ic_curchan) || 625 (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 626 ic->ic_opmode == IEEE80211_M_HOSTAP && 627 (ic->ic_caps & IEEE80211_C_SHSLOT))); 628 /* 629 * Set short preamble and ERP barker-preamble flags. 630 */ 631 if (IEEE80211_IS_CHAN_A(ic->ic_curchan) || 632 (ic->ic_caps & IEEE80211_C_SHPREAMBLE)) { 633 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 634 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 635 } else { 636 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 637 ic->ic_flags |= IEEE80211_F_USEBARKER; 638 } 639} 640 641/* 642 * Set the short slot time state and notify the driver. 643 */ 644void 645ieee80211_set_shortslottime(struct ieee80211com *ic, int onoff) 646{ 647 if (onoff) 648 ic->ic_flags |= IEEE80211_F_SHSLOT; 649 else 650 ic->ic_flags &= ~IEEE80211_F_SHSLOT; 651 /* notify driver */ 652 if (ic->ic_updateslot != NULL) 653 ic->ic_updateslot(ic->ic_ifp); 654} 655 656/* 657 * Check if the specified rate set supports ERP. 658 * NB: the rate set is assumed to be sorted. 659 */ 660int 661ieee80211_iserp_rateset(const struct ieee80211_rateset *rs) 662{ 663 static const int rates[] = { 2, 4, 11, 22, 12, 24, 48 }; 664 int i, j; 665 666 if (rs->rs_nrates < nitems(rates)) 667 return 0; 668 for (i = 0; i < nitems(rates); i++) { 669 for (j = 0; j < rs->rs_nrates; j++) { 670 int r = rs->rs_rates[j] & IEEE80211_RATE_VAL; 671 if (rates[i] == r) 672 goto next; 673 if (r > rates[i]) 674 return 0; 675 } 676 return 0; 677 next: 678 ; 679 } 680 return 1; 681} 682 683/* 684 * Mark the basic rates for the rate table based on the 685 * operating mode. For real 11g we mark all the 11b rates 686 * and 6, 12, and 24 OFDM. For 11b compatibility we mark only 687 * 11b rates. There's also a pseudo 11a-mode used to mark only 688 * the basic OFDM rates. 689 */ 690static void 691setbasicrates(struct ieee80211_rateset *rs, 692 enum ieee80211_phymode mode, int add) 693{ 694 static const struct ieee80211_rateset basic[IEEE80211_MODE_MAX] = { 695 [IEEE80211_MODE_11A] = { 3, { 12, 24, 48 } }, 696 [IEEE80211_MODE_11B] = { 2, { 2, 4 } }, 697 /* NB: mixed b/g */ 698 [IEEE80211_MODE_11G] = { 4, { 2, 4, 11, 22 } }, 699 [IEEE80211_MODE_TURBO_A] = { 3, { 12, 24, 48 } }, 700 [IEEE80211_MODE_TURBO_G] = { 4, { 2, 4, 11, 22 } }, 701 [IEEE80211_MODE_STURBO_A] = { 3, { 12, 24, 48 } }, 702 [IEEE80211_MODE_HALF] = { 3, { 6, 12, 24 } }, 703 [IEEE80211_MODE_QUARTER] = { 3, { 3, 6, 12 } }, 704 [IEEE80211_MODE_11NA] = { 3, { 12, 24, 48 } }, 705 /* NB: mixed b/g */ 706 [IEEE80211_MODE_11NG] = { 4, { 2, 4, 11, 22 } }, 707 }; 708 int i, j; 709 710 for (i = 0; i < rs->rs_nrates; i++) { 711 if (!add) 712 rs->rs_rates[i] &= IEEE80211_RATE_VAL; 713 for (j = 0; j < basic[mode].rs_nrates; j++) 714 if (basic[mode].rs_rates[j] == rs->rs_rates[i]) { 715 rs->rs_rates[i] |= IEEE80211_RATE_BASIC; 716 break; 717 } 718 } 719} 720 721/* 722 * Set the basic rates in a rate set. 723 */ 724void 725ieee80211_setbasicrates(struct ieee80211_rateset *rs, 726 enum ieee80211_phymode mode) 727{ 728 setbasicrates(rs, mode, 0); 729} 730 731/* 732 * Add basic rates to a rate set. 733 */ 734void 735ieee80211_addbasicrates(struct ieee80211_rateset *rs, 736 enum ieee80211_phymode mode) 737{ 738 setbasicrates(rs, mode, 1); 739} 740 741/* 742 * WME protocol support. 743 * 744 * The default 11a/b/g/n parameters come from the WiFi Alliance WMM 745 * System Interopability Test Plan (v1.4, Appendix F) and the 802.11n 746 * Draft 2.0 Test Plan (Appendix D). 747 * 748 * Static/Dynamic Turbo mode settings come from Atheros. 749 */ 750typedef struct phyParamType { 751 uint8_t aifsn; 752 uint8_t logcwmin; 753 uint8_t logcwmax; 754 uint16_t txopLimit; 755 uint8_t acm; 756} paramType; 757 758static const struct phyParamType phyParamForAC_BE[IEEE80211_MODE_MAX] = { 759 [IEEE80211_MODE_AUTO] = { 3, 4, 6, 0, 0 }, 760 [IEEE80211_MODE_11A] = { 3, 4, 6, 0, 0 }, 761 [IEEE80211_MODE_11B] = { 3, 4, 6, 0, 0 }, 762 [IEEE80211_MODE_11G] = { 3, 4, 6, 0, 0 }, 763 [IEEE80211_MODE_FH] = { 3, 4, 6, 0, 0 }, 764 [IEEE80211_MODE_TURBO_A]= { 2, 3, 5, 0, 0 }, 765 [IEEE80211_MODE_TURBO_G]= { 2, 3, 5, 0, 0 }, 766 [IEEE80211_MODE_STURBO_A]={ 2, 3, 5, 0, 0 }, 767 [IEEE80211_MODE_HALF] = { 3, 4, 6, 0, 0 }, 768 [IEEE80211_MODE_QUARTER]= { 3, 4, 6, 0, 0 }, 769 [IEEE80211_MODE_11NA] = { 3, 4, 6, 0, 0 }, 770 [IEEE80211_MODE_11NG] = { 3, 4, 6, 0, 0 }, 771}; 772static const struct phyParamType phyParamForAC_BK[IEEE80211_MODE_MAX] = { 773 [IEEE80211_MODE_AUTO] = { 7, 4, 10, 0, 0 }, 774 [IEEE80211_MODE_11A] = { 7, 4, 10, 0, 0 }, 775 [IEEE80211_MODE_11B] = { 7, 4, 10, 0, 0 }, 776 [IEEE80211_MODE_11G] = { 7, 4, 10, 0, 0 }, 777 [IEEE80211_MODE_FH] = { 7, 4, 10, 0, 0 }, 778 [IEEE80211_MODE_TURBO_A]= { 7, 3, 10, 0, 0 }, 779 [IEEE80211_MODE_TURBO_G]= { 7, 3, 10, 0, 0 }, 780 [IEEE80211_MODE_STURBO_A]={ 7, 3, 10, 0, 0 }, 781 [IEEE80211_MODE_HALF] = { 7, 4, 10, 0, 0 }, 782 [IEEE80211_MODE_QUARTER]= { 7, 4, 10, 0, 0 }, 783 [IEEE80211_MODE_11NA] = { 7, 4, 10, 0, 0 }, 784 [IEEE80211_MODE_11NG] = { 7, 4, 10, 0, 0 }, 785}; 786static const struct phyParamType phyParamForAC_VI[IEEE80211_MODE_MAX] = { 787 [IEEE80211_MODE_AUTO] = { 1, 3, 4, 94, 0 }, 788 [IEEE80211_MODE_11A] = { 1, 3, 4, 94, 0 }, 789 [IEEE80211_MODE_11B] = { 1, 3, 4, 188, 0 }, 790 [IEEE80211_MODE_11G] = { 1, 3, 4, 94, 0 }, 791 [IEEE80211_MODE_FH] = { 1, 3, 4, 188, 0 }, 792 [IEEE80211_MODE_TURBO_A]= { 1, 2, 3, 94, 0 }, 793 [IEEE80211_MODE_TURBO_G]= { 1, 2, 3, 94, 0 }, 794 [IEEE80211_MODE_STURBO_A]={ 1, 2, 3, 94, 0 }, 795 [IEEE80211_MODE_HALF] = { 1, 3, 4, 94, 0 }, 796 [IEEE80211_MODE_QUARTER]= { 1, 3, 4, 94, 0 }, 797 [IEEE80211_MODE_11NA] = { 1, 3, 4, 94, 0 }, 798 [IEEE80211_MODE_11NG] = { 1, 3, 4, 94, 0 }, 799}; 800static const struct phyParamType phyParamForAC_VO[IEEE80211_MODE_MAX] = { 801 [IEEE80211_MODE_AUTO] = { 1, 2, 3, 47, 0 }, 802 [IEEE80211_MODE_11A] = { 1, 2, 3, 47, 0 }, 803 [IEEE80211_MODE_11B] = { 1, 2, 3, 102, 0 }, 804 [IEEE80211_MODE_11G] = { 1, 2, 3, 47, 0 }, 805 [IEEE80211_MODE_FH] = { 1, 2, 3, 102, 0 }, 806 [IEEE80211_MODE_TURBO_A]= { 1, 2, 2, 47, 0 }, 807 [IEEE80211_MODE_TURBO_G]= { 1, 2, 2, 47, 0 }, 808 [IEEE80211_MODE_STURBO_A]={ 1, 2, 2, 47, 0 }, 809 [IEEE80211_MODE_HALF] = { 1, 2, 3, 47, 0 }, 810 [IEEE80211_MODE_QUARTER]= { 1, 2, 3, 47, 0 }, 811 [IEEE80211_MODE_11NA] = { 1, 2, 3, 47, 0 }, 812 [IEEE80211_MODE_11NG] = { 1, 2, 3, 47, 0 }, 813}; 814 815static const struct phyParamType bssPhyParamForAC_BE[IEEE80211_MODE_MAX] = { 816 [IEEE80211_MODE_AUTO] = { 3, 4, 10, 0, 0 }, 817 [IEEE80211_MODE_11A] = { 3, 4, 10, 0, 0 }, 818 [IEEE80211_MODE_11B] = { 3, 4, 10, 0, 0 }, 819 [IEEE80211_MODE_11G] = { 3, 4, 10, 0, 0 }, 820 [IEEE80211_MODE_FH] = { 3, 4, 10, 0, 0 }, 821 [IEEE80211_MODE_TURBO_A]= { 2, 3, 10, 0, 0 }, 822 [IEEE80211_MODE_TURBO_G]= { 2, 3, 10, 0, 0 }, 823 [IEEE80211_MODE_STURBO_A]={ 2, 3, 10, 0, 0 }, 824 [IEEE80211_MODE_HALF] = { 3, 4, 10, 0, 0 }, 825 [IEEE80211_MODE_QUARTER]= { 3, 4, 10, 0, 0 }, 826 [IEEE80211_MODE_11NA] = { 3, 4, 10, 0, 0 }, 827 [IEEE80211_MODE_11NG] = { 3, 4, 10, 0, 0 }, 828}; 829static const struct phyParamType bssPhyParamForAC_VI[IEEE80211_MODE_MAX] = { 830 [IEEE80211_MODE_AUTO] = { 2, 3, 4, 94, 0 }, 831 [IEEE80211_MODE_11A] = { 2, 3, 4, 94, 0 }, 832 [IEEE80211_MODE_11B] = { 2, 3, 4, 188, 0 }, 833 [IEEE80211_MODE_11G] = { 2, 3, 4, 94, 0 }, 834 [IEEE80211_MODE_FH] = { 2, 3, 4, 188, 0 }, 835 [IEEE80211_MODE_TURBO_A]= { 2, 2, 3, 94, 0 }, 836 [IEEE80211_MODE_TURBO_G]= { 2, 2, 3, 94, 0 }, 837 [IEEE80211_MODE_STURBO_A]={ 2, 2, 3, 94, 0 }, 838 [IEEE80211_MODE_HALF] = { 2, 3, 4, 94, 0 }, 839 [IEEE80211_MODE_QUARTER]= { 2, 3, 4, 94, 0 }, 840 [IEEE80211_MODE_11NA] = { 2, 3, 4, 94, 0 }, 841 [IEEE80211_MODE_11NG] = { 2, 3, 4, 94, 0 }, 842}; 843static const struct phyParamType bssPhyParamForAC_VO[IEEE80211_MODE_MAX] = { 844 [IEEE80211_MODE_AUTO] = { 2, 2, 3, 47, 0 }, 845 [IEEE80211_MODE_11A] = { 2, 2, 3, 47, 0 }, 846 [IEEE80211_MODE_11B] = { 2, 2, 3, 102, 0 }, 847 [IEEE80211_MODE_11G] = { 2, 2, 3, 47, 0 }, 848 [IEEE80211_MODE_FH] = { 2, 2, 3, 102, 0 }, 849 [IEEE80211_MODE_TURBO_A]= { 1, 2, 2, 47, 0 }, 850 [IEEE80211_MODE_TURBO_G]= { 1, 2, 2, 47, 0 }, 851 [IEEE80211_MODE_STURBO_A]={ 1, 2, 2, 47, 0 }, 852 [IEEE80211_MODE_HALF] = { 2, 2, 3, 47, 0 }, 853 [IEEE80211_MODE_QUARTER]= { 2, 2, 3, 47, 0 }, 854 [IEEE80211_MODE_11NA] = { 2, 2, 3, 47, 0 }, 855 [IEEE80211_MODE_11NG] = { 2, 2, 3, 47, 0 }, 856}; 857 858static void 859_setifsparams(struct wmeParams *wmep, const paramType *phy) 860{ 861 wmep->wmep_aifsn = phy->aifsn; 862 wmep->wmep_logcwmin = phy->logcwmin; 863 wmep->wmep_logcwmax = phy->logcwmax; 864 wmep->wmep_txopLimit = phy->txopLimit; 865} 866 867static void 868setwmeparams(struct ieee80211vap *vap, const char *type, int ac, 869 struct wmeParams *wmep, const paramType *phy) 870{ 871 wmep->wmep_acm = phy->acm; 872 _setifsparams(wmep, phy); 873 874 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 875 "set %s (%s) [acm %u aifsn %u logcwmin %u logcwmax %u txop %u]\n", 876 ieee80211_wme_acnames[ac], type, 877 wmep->wmep_acm, wmep->wmep_aifsn, wmep->wmep_logcwmin, 878 wmep->wmep_logcwmax, wmep->wmep_txopLimit); 879} 880 881static void 882ieee80211_wme_initparams_locked(struct ieee80211vap *vap) 883{ 884 struct ieee80211com *ic = vap->iv_ic; 885 struct ieee80211_wme_state *wme = &ic->ic_wme; 886 const paramType *pPhyParam, *pBssPhyParam; 887 struct wmeParams *wmep; 888 enum ieee80211_phymode mode; 889 int i; 890 891 IEEE80211_LOCK_ASSERT(ic); 892 893 if ((ic->ic_caps & IEEE80211_C_WME) == 0 || ic->ic_nrunning > 1) 894 return; 895 896 /* 897 * Clear the wme cap_info field so a qoscount from a previous 898 * vap doesn't confuse later code which only parses the beacon 899 * field and updates hardware when said field changes. 900 * Otherwise the hardware is programmed with defaults, not what 901 * the beacon actually announces. 902 */ 903 wme->wme_wmeChanParams.cap_info = 0; 904 905 /* 906 * Select mode; we can be called early in which case we 907 * always use auto mode. We know we'll be called when 908 * entering the RUN state with bsschan setup properly 909 * so state will eventually get set correctly 910 */ 911 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC) 912 mode = ieee80211_chan2mode(ic->ic_bsschan); 913 else 914 mode = IEEE80211_MODE_AUTO; 915 for (i = 0; i < WME_NUM_AC; i++) { 916 switch (i) { 917 case WME_AC_BK: 918 pPhyParam = &phyParamForAC_BK[mode]; 919 pBssPhyParam = &phyParamForAC_BK[mode]; 920 break; 921 case WME_AC_VI: 922 pPhyParam = &phyParamForAC_VI[mode]; 923 pBssPhyParam = &bssPhyParamForAC_VI[mode]; 924 break; 925 case WME_AC_VO: 926 pPhyParam = &phyParamForAC_VO[mode]; 927 pBssPhyParam = &bssPhyParamForAC_VO[mode]; 928 break; 929 case WME_AC_BE: 930 default: 931 pPhyParam = &phyParamForAC_BE[mode]; 932 pBssPhyParam = &bssPhyParamForAC_BE[mode]; 933 break; 934 } 935 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i]; 936 if (ic->ic_opmode == IEEE80211_M_HOSTAP) { 937 setwmeparams(vap, "chan", i, wmep, pPhyParam); 938 } else { 939 setwmeparams(vap, "chan", i, wmep, pBssPhyParam); 940 } 941 wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i]; 942 setwmeparams(vap, "bss ", i, wmep, pBssPhyParam); 943 } 944 /* NB: check ic_bss to avoid NULL deref on initial attach */ 945 if (vap->iv_bss != NULL) { 946 /* 947 * Calculate agressive mode switching threshold based 948 * on beacon interval. This doesn't need locking since 949 * we're only called before entering the RUN state at 950 * which point we start sending beacon frames. 951 */ 952 wme->wme_hipri_switch_thresh = 953 (HIGH_PRI_SWITCH_THRESH * vap->iv_bss->ni_intval) / 100; 954 wme->wme_flags &= ~WME_F_AGGRMODE; 955 ieee80211_wme_updateparams(vap); 956 } 957} 958 959void 960ieee80211_wme_initparams(struct ieee80211vap *vap) 961{ 962 struct ieee80211com *ic = vap->iv_ic; 963 964 IEEE80211_LOCK(ic); 965 ieee80211_wme_initparams_locked(vap); 966 IEEE80211_UNLOCK(ic); 967} 968 969/* 970 * Update WME parameters for ourself and the BSS. 971 */ 972void 973ieee80211_wme_updateparams_locked(struct ieee80211vap *vap) 974{ 975 static const paramType aggrParam[IEEE80211_MODE_MAX] = { 976 [IEEE80211_MODE_AUTO] = { 2, 4, 10, 64, 0 }, 977 [IEEE80211_MODE_11A] = { 2, 4, 10, 64, 0 }, 978 [IEEE80211_MODE_11B] = { 2, 5, 10, 64, 0 }, 979 [IEEE80211_MODE_11G] = { 2, 4, 10, 64, 0 }, 980 [IEEE80211_MODE_FH] = { 2, 5, 10, 64, 0 }, 981 [IEEE80211_MODE_TURBO_A] = { 1, 3, 10, 64, 0 }, 982 [IEEE80211_MODE_TURBO_G] = { 1, 3, 10, 64, 0 }, 983 [IEEE80211_MODE_STURBO_A] = { 1, 3, 10, 64, 0 }, 984 [IEEE80211_MODE_HALF] = { 2, 4, 10, 64, 0 }, 985 [IEEE80211_MODE_QUARTER] = { 2, 4, 10, 64, 0 }, 986 [IEEE80211_MODE_11NA] = { 2, 4, 10, 64, 0 }, /* XXXcheck*/ 987 [IEEE80211_MODE_11NG] = { 2, 4, 10, 64, 0 }, /* XXXcheck*/ 988 }; 989 struct ieee80211com *ic = vap->iv_ic; 990 struct ieee80211_wme_state *wme = &ic->ic_wme; 991 const struct wmeParams *wmep; 992 struct wmeParams *chanp, *bssp; 993 enum ieee80211_phymode mode; 994 int i; 995 int do_aggrmode = 0; 996 997 /* 998 * Set up the channel access parameters for the physical 999 * device. First populate the configured settings. 1000 */ 1001 for (i = 0; i < WME_NUM_AC; i++) { 1002 chanp = &wme->wme_chanParams.cap_wmeParams[i]; 1003 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i]; 1004 chanp->wmep_aifsn = wmep->wmep_aifsn; 1005 chanp->wmep_logcwmin = wmep->wmep_logcwmin; 1006 chanp->wmep_logcwmax = wmep->wmep_logcwmax; 1007 chanp->wmep_txopLimit = wmep->wmep_txopLimit; 1008 1009 chanp = &wme->wme_bssChanParams.cap_wmeParams[i]; 1010 wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i]; 1011 chanp->wmep_aifsn = wmep->wmep_aifsn; 1012 chanp->wmep_logcwmin = wmep->wmep_logcwmin; 1013 chanp->wmep_logcwmax = wmep->wmep_logcwmax; 1014 chanp->wmep_txopLimit = wmep->wmep_txopLimit; 1015 } 1016 1017 /* 1018 * Select mode; we can be called early in which case we 1019 * always use auto mode. We know we'll be called when 1020 * entering the RUN state with bsschan setup properly 1021 * so state will eventually get set correctly 1022 */ 1023 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC) 1024 mode = ieee80211_chan2mode(ic->ic_bsschan); 1025 else 1026 mode = IEEE80211_MODE_AUTO; 1027 1028 /* 1029 * This implements agressive mode as found in certain 1030 * vendors' AP's. When there is significant high 1031 * priority (VI/VO) traffic in the BSS throttle back BE 1032 * traffic by using conservative parameters. Otherwise 1033 * BE uses agressive params to optimize performance of 1034 * legacy/non-QoS traffic. 1035 */ 1036 1037 /* Hostap? Only if aggressive mode is enabled */ 1038 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 1039 (wme->wme_flags & WME_F_AGGRMODE) != 0) 1040 do_aggrmode = 1; 1041 1042 /* 1043 * Station? Only if we're in a non-QoS BSS. 1044 */ 1045 else if ((vap->iv_opmode == IEEE80211_M_STA && 1046 (vap->iv_bss->ni_flags & IEEE80211_NODE_QOS) == 0)) 1047 do_aggrmode = 1; 1048 1049 /* 1050 * IBSS? Only if we we have WME enabled. 1051 */ 1052 else if ((vap->iv_opmode == IEEE80211_M_IBSS) && 1053 (vap->iv_flags & IEEE80211_F_WME)) 1054 do_aggrmode = 1; 1055 1056 /* 1057 * If WME is disabled on this VAP, default to aggressive mode 1058 * regardless of the configuration. 1059 */ 1060 if ((vap->iv_flags & IEEE80211_F_WME) == 0) 1061 do_aggrmode = 1; 1062 1063 /* XXX WDS? */ 1064 1065 /* XXX MBSS? */ 1066 1067 if (do_aggrmode) { 1068 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE]; 1069 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE]; 1070 1071 chanp->wmep_aifsn = bssp->wmep_aifsn = aggrParam[mode].aifsn; 1072 chanp->wmep_logcwmin = bssp->wmep_logcwmin = 1073 aggrParam[mode].logcwmin; 1074 chanp->wmep_logcwmax = bssp->wmep_logcwmax = 1075 aggrParam[mode].logcwmax; 1076 chanp->wmep_txopLimit = bssp->wmep_txopLimit = 1077 (vap->iv_flags & IEEE80211_F_BURST) ? 1078 aggrParam[mode].txopLimit : 0; 1079 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 1080 "update %s (chan+bss) [acm %u aifsn %u logcwmin %u " 1081 "logcwmax %u txop %u]\n", ieee80211_wme_acnames[WME_AC_BE], 1082 chanp->wmep_acm, chanp->wmep_aifsn, chanp->wmep_logcwmin, 1083 chanp->wmep_logcwmax, chanp->wmep_txopLimit); 1084 } 1085 1086 1087 /* 1088 * Change the contention window based on the number of associated 1089 * stations. If the number of associated stations is 1 and 1090 * aggressive mode is enabled, lower the contention window even 1091 * further. 1092 */ 1093 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 1094 ic->ic_sta_assoc < 2 && (wme->wme_flags & WME_F_AGGRMODE) != 0) { 1095 static const uint8_t logCwMin[IEEE80211_MODE_MAX] = { 1096 [IEEE80211_MODE_AUTO] = 3, 1097 [IEEE80211_MODE_11A] = 3, 1098 [IEEE80211_MODE_11B] = 4, 1099 [IEEE80211_MODE_11G] = 3, 1100 [IEEE80211_MODE_FH] = 4, 1101 [IEEE80211_MODE_TURBO_A] = 3, 1102 [IEEE80211_MODE_TURBO_G] = 3, 1103 [IEEE80211_MODE_STURBO_A] = 3, 1104 [IEEE80211_MODE_HALF] = 3, 1105 [IEEE80211_MODE_QUARTER] = 3, 1106 [IEEE80211_MODE_11NA] = 3, 1107 [IEEE80211_MODE_11NG] = 3, 1108 }; 1109 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE]; 1110 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE]; 1111 1112 chanp->wmep_logcwmin = bssp->wmep_logcwmin = logCwMin[mode]; 1113 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 1114 "update %s (chan+bss) logcwmin %u\n", 1115 ieee80211_wme_acnames[WME_AC_BE], chanp->wmep_logcwmin); 1116 } 1117 1118 /* 1119 * Arrange for the beacon update. 1120 * 1121 * XXX what about MBSS, WDS? 1122 */ 1123 if (vap->iv_opmode == IEEE80211_M_HOSTAP 1124 || vap->iv_opmode == IEEE80211_M_IBSS) { 1125 /* 1126 * Arrange for a beacon update and bump the parameter 1127 * set number so associated stations load the new values. 1128 */ 1129 wme->wme_bssChanParams.cap_info = 1130 (wme->wme_bssChanParams.cap_info+1) & WME_QOSINFO_COUNT; 1131 ieee80211_beacon_notify(vap, IEEE80211_BEACON_WME); 1132 } 1133 1134 wme->wme_update(ic); 1135 1136 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 1137 "%s: WME params updated, cap_info 0x%x\n", __func__, 1138 vap->iv_opmode == IEEE80211_M_STA ? 1139 wme->wme_wmeChanParams.cap_info : 1140 wme->wme_bssChanParams.cap_info); 1141} 1142 1143void 1144ieee80211_wme_updateparams(struct ieee80211vap *vap) 1145{ 1146 struct ieee80211com *ic = vap->iv_ic; 1147 1148 if (ic->ic_caps & IEEE80211_C_WME) { 1149 IEEE80211_LOCK(ic); 1150 ieee80211_wme_updateparams_locked(vap); 1151 IEEE80211_UNLOCK(ic); 1152 } 1153} 1154 1155static void 1156parent_updown(void *arg, int npending) 1157{ 1158 struct ifnet *parent = arg; 1159 1160 parent->if_ioctl(parent, SIOCSIFFLAGS, NULL); 1161} 1162 1163static void 1164update_mcast(void *arg, int npending) 1165{ 1166 struct ieee80211com *ic = arg; 1167 struct ifnet *parent = ic->ic_ifp; 1168 1169 ic->ic_update_mcast(parent); 1170} 1171 1172static void 1173update_promisc(void *arg, int npending) 1174{ 1175 struct ieee80211com *ic = arg; 1176 struct ifnet *parent = ic->ic_ifp; 1177 1178 ic->ic_update_promisc(parent); 1179} 1180 1181static void 1182update_channel(void *arg, int npending) 1183{ 1184 struct ieee80211com *ic = arg; 1185 1186 ic->ic_set_channel(ic); 1187 ieee80211_radiotap_chan_change(ic); 1188} 1189 1190static void 1191update_chw(void *arg, int npending) 1192{ 1193 struct ieee80211com *ic = arg; 1194 1195 /* 1196 * XXX should we defer the channel width _config_ update until now? 1197 */ 1198 ic->ic_update_chw(ic); 1199} 1200 1201/* 1202 * Block until the parent is in a known state. This is 1203 * used after any operations that dispatch a task (e.g. 1204 * to auto-configure the parent device up/down). 1205 */ 1206void 1207ieee80211_waitfor_parent(struct ieee80211com *ic) 1208{ 1209 taskqueue_block(ic->ic_tq); 1210 ieee80211_draintask(ic, &ic->ic_parent_task); 1211 ieee80211_draintask(ic, &ic->ic_mcast_task); 1212 ieee80211_draintask(ic, &ic->ic_promisc_task); 1213 ieee80211_draintask(ic, &ic->ic_chan_task); 1214 ieee80211_draintask(ic, &ic->ic_bmiss_task); 1215 ieee80211_draintask(ic, &ic->ic_chw_task); 1216 taskqueue_unblock(ic->ic_tq); 1217} 1218 1219/* 1220 * Start a vap running. If this is the first vap to be 1221 * set running on the underlying device then we 1222 * automatically bring the device up. 1223 */ 1224void 1225ieee80211_start_locked(struct ieee80211vap *vap) 1226{ 1227 struct ifnet *ifp = vap->iv_ifp; 1228 struct ieee80211com *ic = vap->iv_ic; 1229 struct ifnet *parent = ic->ic_ifp; 1230 1231 IEEE80211_LOCK_ASSERT(ic); 1232 1233 IEEE80211_DPRINTF(vap, 1234 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1235 "start running, %d vaps running\n", ic->ic_nrunning); 1236 1237 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) { 1238 /* 1239 * Mark us running. Note that it's ok to do this first; 1240 * if we need to bring the parent device up we defer that 1241 * to avoid dropping the com lock. We expect the device 1242 * to respond to being marked up by calling back into us 1243 * through ieee80211_start_all at which point we'll come 1244 * back in here and complete the work. 1245 */ 1246 ifp->if_drv_flags |= IFF_DRV_RUNNING; 1247 /* 1248 * We are not running; if this we are the first vap 1249 * to be brought up auto-up the parent if necessary. 1250 */ 1251 if (ic->ic_nrunning++ == 0 && 1252 (parent->if_drv_flags & IFF_DRV_RUNNING) == 0) { 1253 IEEE80211_DPRINTF(vap, 1254 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1255 "%s: up parent %s\n", __func__, parent->if_xname); 1256 parent->if_flags |= IFF_UP; 1257 ieee80211_runtask(ic, &ic->ic_parent_task); 1258 return; 1259 } 1260 } 1261 /* 1262 * If the parent is up and running, then kick the 1263 * 802.11 state machine as appropriate. 1264 */ 1265 if ((parent->if_drv_flags & IFF_DRV_RUNNING) && 1266 vap->iv_roaming != IEEE80211_ROAMING_MANUAL) { 1267 if (vap->iv_opmode == IEEE80211_M_STA) { 1268#if 0 1269 /* XXX bypasses scan too easily; disable for now */ 1270 /* 1271 * Try to be intelligent about clocking the state 1272 * machine. If we're currently in RUN state then 1273 * we should be able to apply any new state/parameters 1274 * simply by re-associating. Otherwise we need to 1275 * re-scan to select an appropriate ap. 1276 */ 1277 if (vap->iv_state >= IEEE80211_S_RUN) 1278 ieee80211_new_state_locked(vap, 1279 IEEE80211_S_ASSOC, 1); 1280 else 1281#endif 1282 ieee80211_new_state_locked(vap, 1283 IEEE80211_S_SCAN, 0); 1284 } else { 1285 /* 1286 * For monitor+wds mode there's nothing to do but 1287 * start running. Otherwise if this is the first 1288 * vap to be brought up, start a scan which may be 1289 * preempted if the station is locked to a particular 1290 * channel. 1291 */ 1292 vap->iv_flags_ext |= IEEE80211_FEXT_REINIT; 1293 if (vap->iv_opmode == IEEE80211_M_MONITOR || 1294 vap->iv_opmode == IEEE80211_M_WDS) 1295 ieee80211_new_state_locked(vap, 1296 IEEE80211_S_RUN, -1); 1297 else 1298 ieee80211_new_state_locked(vap, 1299 IEEE80211_S_SCAN, 0); 1300 } 1301 } 1302} 1303 1304/* 1305 * Start a single vap. 1306 */ 1307void 1308ieee80211_init(void *arg) 1309{ 1310 struct ieee80211vap *vap = arg; 1311 1312 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1313 "%s\n", __func__); 1314 1315 IEEE80211_LOCK(vap->iv_ic); 1316 ieee80211_start_locked(vap); 1317 IEEE80211_UNLOCK(vap->iv_ic); 1318} 1319 1320/* 1321 * Start all runnable vap's on a device. 1322 */ 1323void 1324ieee80211_start_all(struct ieee80211com *ic) 1325{ 1326 struct ieee80211vap *vap; 1327 1328 IEEE80211_LOCK(ic); 1329 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1330 struct ifnet *ifp = vap->iv_ifp; 1331 if (IFNET_IS_UP_RUNNING(ifp)) /* NB: avoid recursion */ 1332 ieee80211_start_locked(vap); 1333 } 1334 IEEE80211_UNLOCK(ic); 1335} 1336 1337/* 1338 * Stop a vap. We force it down using the state machine 1339 * then mark it's ifnet not running. If this is the last 1340 * vap running on the underlying device then we close it 1341 * too to insure it will be properly initialized when the 1342 * next vap is brought up. 1343 */ 1344void 1345ieee80211_stop_locked(struct ieee80211vap *vap) 1346{ 1347 struct ieee80211com *ic = vap->iv_ic; 1348 struct ifnet *ifp = vap->iv_ifp; 1349 struct ifnet *parent = ic->ic_ifp; 1350 1351 IEEE80211_LOCK_ASSERT(ic); 1352 1353 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1354 "stop running, %d vaps running\n", ic->ic_nrunning); 1355 1356 ieee80211_new_state_locked(vap, IEEE80211_S_INIT, -1); 1357 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 1358 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; /* mark us stopped */ 1359 if (--ic->ic_nrunning == 0 && 1360 (parent->if_drv_flags & IFF_DRV_RUNNING)) { 1361 IEEE80211_DPRINTF(vap, 1362 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1363 "down parent %s\n", parent->if_xname); 1364 parent->if_flags &= ~IFF_UP; 1365 ieee80211_runtask(ic, &ic->ic_parent_task); 1366 } 1367 } 1368} 1369 1370void 1371ieee80211_stop(struct ieee80211vap *vap) 1372{ 1373 struct ieee80211com *ic = vap->iv_ic; 1374 1375 IEEE80211_LOCK(ic); 1376 ieee80211_stop_locked(vap); 1377 IEEE80211_UNLOCK(ic); 1378} 1379 1380/* 1381 * Stop all vap's running on a device. 1382 */ 1383void 1384ieee80211_stop_all(struct ieee80211com *ic) 1385{ 1386 struct ieee80211vap *vap; 1387 1388 IEEE80211_LOCK(ic); 1389 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1390 struct ifnet *ifp = vap->iv_ifp; 1391 if (IFNET_IS_UP_RUNNING(ifp)) /* NB: avoid recursion */ 1392 ieee80211_stop_locked(vap); 1393 } 1394 IEEE80211_UNLOCK(ic); 1395 1396 ieee80211_waitfor_parent(ic); 1397} 1398 1399/* 1400 * Stop all vap's running on a device and arrange 1401 * for those that were running to be resumed. 1402 */ 1403void 1404ieee80211_suspend_all(struct ieee80211com *ic) 1405{ 1406 struct ieee80211vap *vap; 1407 1408 IEEE80211_LOCK(ic); 1409 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1410 struct ifnet *ifp = vap->iv_ifp; 1411 if (IFNET_IS_UP_RUNNING(ifp)) { /* NB: avoid recursion */ 1412 vap->iv_flags_ext |= IEEE80211_FEXT_RESUME; 1413 ieee80211_stop_locked(vap); 1414 } 1415 } 1416 IEEE80211_UNLOCK(ic); 1417 1418 ieee80211_waitfor_parent(ic); 1419} 1420 1421/* 1422 * Start all vap's marked for resume. 1423 */ 1424void 1425ieee80211_resume_all(struct ieee80211com *ic) 1426{ 1427 struct ieee80211vap *vap; 1428 1429 IEEE80211_LOCK(ic); 1430 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1431 struct ifnet *ifp = vap->iv_ifp; 1432 if (!IFNET_IS_UP_RUNNING(ifp) && 1433 (vap->iv_flags_ext & IEEE80211_FEXT_RESUME)) { 1434 vap->iv_flags_ext &= ~IEEE80211_FEXT_RESUME; 1435 ieee80211_start_locked(vap); 1436 } 1437 } 1438 IEEE80211_UNLOCK(ic); 1439} 1440 1441void 1442ieee80211_beacon_miss(struct ieee80211com *ic) 1443{ 1444 IEEE80211_LOCK(ic); 1445 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 1446 /* Process in a taskq, the handler may reenter the driver */ 1447 ieee80211_runtask(ic, &ic->ic_bmiss_task); 1448 } 1449 IEEE80211_UNLOCK(ic); 1450} 1451 1452static void 1453beacon_miss(void *arg, int npending) 1454{ 1455 struct ieee80211com *ic = arg; 1456 struct ieee80211vap *vap; 1457 1458 IEEE80211_LOCK(ic); 1459 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1460 /* 1461 * We only pass events through for sta vap's in RUN state; 1462 * may be too restrictive but for now this saves all the 1463 * handlers duplicating these checks. 1464 */ 1465 if (vap->iv_opmode == IEEE80211_M_STA && 1466 vap->iv_state >= IEEE80211_S_RUN && 1467 vap->iv_bmiss != NULL) 1468 vap->iv_bmiss(vap); 1469 } 1470 IEEE80211_UNLOCK(ic); 1471} 1472 1473static void 1474beacon_swmiss(void *arg, int npending) 1475{ 1476 struct ieee80211vap *vap = arg; 1477 struct ieee80211com *ic = vap->iv_ic; 1478 1479 IEEE80211_LOCK(ic); 1480 if (vap->iv_state == IEEE80211_S_RUN) { 1481 /* XXX Call multiple times if npending > zero? */ 1482 vap->iv_bmiss(vap); 1483 } 1484 IEEE80211_UNLOCK(ic); 1485} 1486 1487/* 1488 * Software beacon miss handling. Check if any beacons 1489 * were received in the last period. If not post a 1490 * beacon miss; otherwise reset the counter. 1491 */ 1492void 1493ieee80211_swbmiss(void *arg) 1494{ 1495 struct ieee80211vap *vap = arg; 1496 struct ieee80211com *ic = vap->iv_ic; 1497 1498 IEEE80211_LOCK_ASSERT(ic); 1499 1500 /* XXX sleep state? */ 1501 KASSERT(vap->iv_state == IEEE80211_S_RUN, 1502 ("wrong state %d", vap->iv_state)); 1503 1504 if (ic->ic_flags & IEEE80211_F_SCAN) { 1505 /* 1506 * If scanning just ignore and reset state. If we get a 1507 * bmiss after coming out of scan because we haven't had 1508 * time to receive a beacon then we should probe the AP 1509 * before posting a real bmiss (unless iv_bmiss_max has 1510 * been artifiically lowered). A cleaner solution might 1511 * be to disable the timer on scan start/end but to handle 1512 * case of multiple sta vap's we'd need to disable the 1513 * timers of all affected vap's. 1514 */ 1515 vap->iv_swbmiss_count = 0; 1516 } else if (vap->iv_swbmiss_count == 0) { 1517 if (vap->iv_bmiss != NULL) 1518 ieee80211_runtask(ic, &vap->iv_swbmiss_task); 1519 } else 1520 vap->iv_swbmiss_count = 0; 1521 callout_reset(&vap->iv_swbmiss, vap->iv_swbmiss_period, 1522 ieee80211_swbmiss, vap); 1523} 1524 1525/* 1526 * Start an 802.11h channel switch. We record the parameters, 1527 * mark the operation pending, notify each vap through the 1528 * beacon update mechanism so it can update the beacon frame 1529 * contents, and then switch vap's to CSA state to block outbound 1530 * traffic. Devices that handle CSA directly can use the state 1531 * switch to do the right thing so long as they call 1532 * ieee80211_csa_completeswitch when it's time to complete the 1533 * channel change. Devices that depend on the net80211 layer can 1534 * use ieee80211_beacon_update to handle the countdown and the 1535 * channel switch. 1536 */ 1537void 1538ieee80211_csa_startswitch(struct ieee80211com *ic, 1539 struct ieee80211_channel *c, int mode, int count) 1540{ 1541 struct ieee80211vap *vap; 1542 1543 IEEE80211_LOCK_ASSERT(ic); 1544 1545 ic->ic_csa_newchan = c; 1546 ic->ic_csa_mode = mode; 1547 ic->ic_csa_count = count; 1548 ic->ic_flags |= IEEE80211_F_CSAPENDING; 1549 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1550 if (vap->iv_opmode == IEEE80211_M_HOSTAP || 1551 vap->iv_opmode == IEEE80211_M_IBSS || 1552 vap->iv_opmode == IEEE80211_M_MBSS) 1553 ieee80211_beacon_notify(vap, IEEE80211_BEACON_CSA); 1554 /* switch to CSA state to block outbound traffic */ 1555 if (vap->iv_state == IEEE80211_S_RUN) 1556 ieee80211_new_state_locked(vap, IEEE80211_S_CSA, 0); 1557 } 1558 ieee80211_notify_csa(ic, c, mode, count); 1559} 1560 1561/* 1562 * Complete the channel switch by transitioning all CSA VAPs to RUN. 1563 * This is called by both the completion and cancellation functions 1564 * so each VAP is placed back in the RUN state and can thus transmit. 1565 */ 1566static void 1567csa_completeswitch(struct ieee80211com *ic) 1568{ 1569 struct ieee80211vap *vap; 1570 1571 ic->ic_csa_newchan = NULL; 1572 ic->ic_flags &= ~IEEE80211_F_CSAPENDING; 1573 1574 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1575 if (vap->iv_state == IEEE80211_S_CSA) 1576 ieee80211_new_state_locked(vap, IEEE80211_S_RUN, 0); 1577} 1578 1579/* 1580 * Complete an 802.11h channel switch started by ieee80211_csa_startswitch. 1581 * We clear state and move all vap's in CSA state to RUN state 1582 * so they can again transmit. 1583 * 1584 * Although this may not be completely correct, update the BSS channel 1585 * for each VAP to the newly configured channel. The setcurchan sets 1586 * the current operating channel for the interface (so the radio does 1587 * switch over) but the VAP BSS isn't updated, leading to incorrectly 1588 * reported information via ioctl. 1589 */ 1590void 1591ieee80211_csa_completeswitch(struct ieee80211com *ic) 1592{ 1593 struct ieee80211vap *vap; 1594 1595 IEEE80211_LOCK_ASSERT(ic); 1596 1597 KASSERT(ic->ic_flags & IEEE80211_F_CSAPENDING, ("csa not pending")); 1598 1599 ieee80211_setcurchan(ic, ic->ic_csa_newchan); 1600 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1601 if (vap->iv_state == IEEE80211_S_CSA) 1602 vap->iv_bss->ni_chan = ic->ic_curchan; 1603 1604 csa_completeswitch(ic); 1605} 1606 1607/* 1608 * Cancel an 802.11h channel switch started by ieee80211_csa_startswitch. 1609 * We clear state and move all vap's in CSA state to RUN state 1610 * so they can again transmit. 1611 */ 1612void 1613ieee80211_csa_cancelswitch(struct ieee80211com *ic) 1614{ 1615 IEEE80211_LOCK_ASSERT(ic); 1616 1617 csa_completeswitch(ic); 1618} 1619 1620/* 1621 * Complete a DFS CAC started by ieee80211_dfs_cac_start. 1622 * We clear state and move all vap's in CAC state to RUN state. 1623 */ 1624void 1625ieee80211_cac_completeswitch(struct ieee80211vap *vap0) 1626{ 1627 struct ieee80211com *ic = vap0->iv_ic; 1628 struct ieee80211vap *vap; 1629 1630 IEEE80211_LOCK(ic); 1631 /* 1632 * Complete CAC state change for lead vap first; then 1633 * clock all the other vap's waiting. 1634 */ 1635 KASSERT(vap0->iv_state == IEEE80211_S_CAC, 1636 ("wrong state %d", vap0->iv_state)); 1637 ieee80211_new_state_locked(vap0, IEEE80211_S_RUN, 0); 1638 1639 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1640 if (vap->iv_state == IEEE80211_S_CAC) 1641 ieee80211_new_state_locked(vap, IEEE80211_S_RUN, 0); 1642 IEEE80211_UNLOCK(ic); 1643} 1644 1645/* 1646 * Force all vap's other than the specified vap to the INIT state 1647 * and mark them as waiting for a scan to complete. These vaps 1648 * will be brought up when the scan completes and the scanning vap 1649 * reaches RUN state by wakeupwaiting. 1650 */ 1651static void 1652markwaiting(struct ieee80211vap *vap0) 1653{ 1654 struct ieee80211com *ic = vap0->iv_ic; 1655 struct ieee80211vap *vap; 1656 1657 IEEE80211_LOCK_ASSERT(ic); 1658 1659 /* 1660 * A vap list entry can not disappear since we are running on the 1661 * taskqueue and a vap destroy will queue and drain another state 1662 * change task. 1663 */ 1664 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1665 if (vap == vap0) 1666 continue; 1667 if (vap->iv_state != IEEE80211_S_INIT) { 1668 /* NB: iv_newstate may drop the lock */ 1669 vap->iv_newstate(vap, IEEE80211_S_INIT, 0); 1670 IEEE80211_LOCK_ASSERT(ic); 1671 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT; 1672 } 1673 } 1674} 1675 1676/* 1677 * Wakeup all vap's waiting for a scan to complete. This is the 1678 * companion to markwaiting (above) and is used to coordinate 1679 * multiple vaps scanning. 1680 * This is called from the state taskqueue. 1681 */ 1682static void 1683wakeupwaiting(struct ieee80211vap *vap0) 1684{ 1685 struct ieee80211com *ic = vap0->iv_ic; 1686 struct ieee80211vap *vap; 1687 1688 IEEE80211_LOCK_ASSERT(ic); 1689 1690 /* 1691 * A vap list entry can not disappear since we are running on the 1692 * taskqueue and a vap destroy will queue and drain another state 1693 * change task. 1694 */ 1695 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1696 if (vap == vap0) 1697 continue; 1698 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANWAIT) { 1699 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANWAIT; 1700 /* NB: sta's cannot go INIT->RUN */ 1701 /* NB: iv_newstate may drop the lock */ 1702 vap->iv_newstate(vap, 1703 vap->iv_opmode == IEEE80211_M_STA ? 1704 IEEE80211_S_SCAN : IEEE80211_S_RUN, 0); 1705 IEEE80211_LOCK_ASSERT(ic); 1706 } 1707 } 1708} 1709 1710/* 1711 * Handle post state change work common to all operating modes. 1712 */ 1713static void 1714ieee80211_newstate_cb(void *xvap, int npending) 1715{ 1716 struct ieee80211vap *vap = xvap; 1717 struct ieee80211com *ic = vap->iv_ic; 1718 enum ieee80211_state nstate, ostate; 1719 int arg, rc; 1720 1721 IEEE80211_LOCK(ic); 1722 nstate = vap->iv_nstate; 1723 arg = vap->iv_nstate_arg; 1724 1725 if (vap->iv_flags_ext & IEEE80211_FEXT_REINIT) { 1726 /* 1727 * We have been requested to drop back to the INIT before 1728 * proceeding to the new state. 1729 */ 1730 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1731 "%s: %s -> %s arg %d\n", __func__, 1732 ieee80211_state_name[vap->iv_state], 1733 ieee80211_state_name[IEEE80211_S_INIT], arg); 1734 vap->iv_newstate(vap, IEEE80211_S_INIT, arg); 1735 IEEE80211_LOCK_ASSERT(ic); 1736 vap->iv_flags_ext &= ~IEEE80211_FEXT_REINIT; 1737 } 1738 1739 ostate = vap->iv_state; 1740 if (nstate == IEEE80211_S_SCAN && ostate != IEEE80211_S_INIT) { 1741 /* 1742 * SCAN was forced; e.g. on beacon miss. Force other running 1743 * vap's to INIT state and mark them as waiting for the scan to 1744 * complete. This insures they don't interfere with our 1745 * scanning. Since we are single threaded the vaps can not 1746 * transition again while we are executing. 1747 * 1748 * XXX not always right, assumes ap follows sta 1749 */ 1750 markwaiting(vap); 1751 } 1752 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1753 "%s: %s -> %s arg %d\n", __func__, 1754 ieee80211_state_name[ostate], ieee80211_state_name[nstate], arg); 1755 1756 rc = vap->iv_newstate(vap, nstate, arg); 1757 IEEE80211_LOCK_ASSERT(ic); 1758 vap->iv_flags_ext &= ~IEEE80211_FEXT_STATEWAIT; 1759 if (rc != 0) { 1760 /* State transition failed */ 1761 KASSERT(rc != EINPROGRESS, ("iv_newstate was deferred")); 1762 KASSERT(nstate != IEEE80211_S_INIT, 1763 ("INIT state change failed")); 1764 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1765 "%s: %s returned error %d\n", __func__, 1766 ieee80211_state_name[nstate], rc); 1767 goto done; 1768 } 1769 1770 /* No actual transition, skip post processing */ 1771 if (ostate == nstate) 1772 goto done; 1773 1774 if (nstate == IEEE80211_S_RUN) { 1775 /* 1776 * OACTIVE may be set on the vap if the upper layer 1777 * tried to transmit (e.g. IPv6 NDP) before we reach 1778 * RUN state. Clear it and restart xmit. 1779 * 1780 * Note this can also happen as a result of SLEEP->RUN 1781 * (i.e. coming out of power save mode). 1782 */ 1783 vap->iv_ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 1784 1785 /* 1786 * XXX TODO Kick-start a VAP queue - this should be a method! 1787 */ 1788 1789 /* bring up any vaps waiting on us */ 1790 wakeupwaiting(vap); 1791 } else if (nstate == IEEE80211_S_INIT) { 1792 /* 1793 * Flush the scan cache if we did the last scan (XXX?) 1794 * and flush any frames on send queues from this vap. 1795 * Note the mgt q is used only for legacy drivers and 1796 * will go away shortly. 1797 */ 1798 ieee80211_scan_flush(vap); 1799 1800 /* 1801 * XXX TODO: ic/vap queue flush 1802 */ 1803 } 1804done: 1805 IEEE80211_UNLOCK(ic); 1806} 1807 1808/* 1809 * Public interface for initiating a state machine change. 1810 * This routine single-threads the request and coordinates 1811 * the scheduling of multiple vaps for the purpose of selecting 1812 * an operating channel. Specifically the following scenarios 1813 * are handled: 1814 * o only one vap can be selecting a channel so on transition to 1815 * SCAN state if another vap is already scanning then 1816 * mark the caller for later processing and return without 1817 * doing anything (XXX? expectations by caller of synchronous operation) 1818 * o only one vap can be doing CAC of a channel so on transition to 1819 * CAC state if another vap is already scanning for radar then 1820 * mark the caller for later processing and return without 1821 * doing anything (XXX? expectations by caller of synchronous operation) 1822 * o if another vap is already running when a request is made 1823 * to SCAN then an operating channel has been chosen; bypass 1824 * the scan and just join the channel 1825 * 1826 * Note that the state change call is done through the iv_newstate 1827 * method pointer so any driver routine gets invoked. The driver 1828 * will normally call back into operating mode-specific 1829 * ieee80211_newstate routines (below) unless it needs to completely 1830 * bypass the state machine (e.g. because the firmware has it's 1831 * own idea how things should work). Bypassing the net80211 layer 1832 * is usually a mistake and indicates lack of proper integration 1833 * with the net80211 layer. 1834 */ 1835int 1836ieee80211_new_state_locked(struct ieee80211vap *vap, 1837 enum ieee80211_state nstate, int arg) 1838{ 1839 struct ieee80211com *ic = vap->iv_ic; 1840 struct ieee80211vap *vp; 1841 enum ieee80211_state ostate; 1842 int nrunning, nscanning; 1843 1844 IEEE80211_LOCK_ASSERT(ic); 1845 1846 if (vap->iv_flags_ext & IEEE80211_FEXT_STATEWAIT) { 1847 if (vap->iv_nstate == IEEE80211_S_INIT) { 1848 /* 1849 * XXX The vap is being stopped, do no allow any other 1850 * state changes until this is completed. 1851 */ 1852 return -1; 1853 } else if (vap->iv_state != vap->iv_nstate) { 1854#if 0 1855 /* Warn if the previous state hasn't completed. */ 1856 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1857 "%s: pending %s -> %s transition lost\n", __func__, 1858 ieee80211_state_name[vap->iv_state], 1859 ieee80211_state_name[vap->iv_nstate]); 1860#else 1861 /* XXX temporarily enable to identify issues */ 1862 if_printf(vap->iv_ifp, 1863 "%s: pending %s -> %s transition lost\n", 1864 __func__, ieee80211_state_name[vap->iv_state], 1865 ieee80211_state_name[vap->iv_nstate]); 1866#endif 1867 } 1868 } 1869 1870 nrunning = nscanning = 0; 1871 /* XXX can track this state instead of calculating */ 1872 TAILQ_FOREACH(vp, &ic->ic_vaps, iv_next) { 1873 if (vp != vap) { 1874 if (vp->iv_state >= IEEE80211_S_RUN) 1875 nrunning++; 1876 /* XXX doesn't handle bg scan */ 1877 /* NB: CAC+AUTH+ASSOC treated like SCAN */ 1878 else if (vp->iv_state > IEEE80211_S_INIT) 1879 nscanning++; 1880 } 1881 } 1882 ostate = vap->iv_state; 1883 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1884 "%s: %s -> %s (nrunning %d nscanning %d)\n", __func__, 1885 ieee80211_state_name[ostate], ieee80211_state_name[nstate], 1886 nrunning, nscanning); 1887 switch (nstate) { 1888 case IEEE80211_S_SCAN: 1889 if (ostate == IEEE80211_S_INIT) { 1890 /* 1891 * INIT -> SCAN happens on initial bringup. 1892 */ 1893 KASSERT(!(nscanning && nrunning), 1894 ("%d scanning and %d running", nscanning, nrunning)); 1895 if (nscanning) { 1896 /* 1897 * Someone is scanning, defer our state 1898 * change until the work has completed. 1899 */ 1900 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1901 "%s: defer %s -> %s\n", 1902 __func__, ieee80211_state_name[ostate], 1903 ieee80211_state_name[nstate]); 1904 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT; 1905 return 0; 1906 } 1907 if (nrunning) { 1908 /* 1909 * Someone is operating; just join the channel 1910 * they have chosen. 1911 */ 1912 /* XXX kill arg? */ 1913 /* XXX check each opmode, adhoc? */ 1914 if (vap->iv_opmode == IEEE80211_M_STA) 1915 nstate = IEEE80211_S_SCAN; 1916 else 1917 nstate = IEEE80211_S_RUN; 1918#ifdef IEEE80211_DEBUG 1919 if (nstate != IEEE80211_S_SCAN) { 1920 IEEE80211_DPRINTF(vap, 1921 IEEE80211_MSG_STATE, 1922 "%s: override, now %s -> %s\n", 1923 __func__, 1924 ieee80211_state_name[ostate], 1925 ieee80211_state_name[nstate]); 1926 } 1927#endif 1928 } 1929 } 1930 break; 1931 case IEEE80211_S_RUN: 1932 if (vap->iv_opmode == IEEE80211_M_WDS && 1933 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) && 1934 nscanning) { 1935 /* 1936 * Legacy WDS with someone else scanning; don't 1937 * go online until that completes as we should 1938 * follow the other vap to the channel they choose. 1939 */ 1940 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1941 "%s: defer %s -> %s (legacy WDS)\n", __func__, 1942 ieee80211_state_name[ostate], 1943 ieee80211_state_name[nstate]); 1944 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT; 1945 return 0; 1946 } 1947 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 1948 IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) && 1949 (vap->iv_flags_ext & IEEE80211_FEXT_DFS) && 1950 !IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) { 1951 /* 1952 * This is a DFS channel, transition to CAC state 1953 * instead of RUN. This allows us to initiate 1954 * Channel Availability Check (CAC) as specified 1955 * by 11h/DFS. 1956 */ 1957 nstate = IEEE80211_S_CAC; 1958 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1959 "%s: override %s -> %s (DFS)\n", __func__, 1960 ieee80211_state_name[ostate], 1961 ieee80211_state_name[nstate]); 1962 } 1963 break; 1964 case IEEE80211_S_INIT: 1965 /* cancel any scan in progress */ 1966 ieee80211_cancel_scan(vap); 1967 if (ostate == IEEE80211_S_INIT ) { 1968 /* XXX don't believe this */ 1969 /* INIT -> INIT. nothing to do */ 1970 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANWAIT; 1971 } 1972 /* fall thru... */ 1973 default: 1974 break; 1975 } 1976 /* defer the state change to a thread */ 1977 vap->iv_nstate = nstate; 1978 vap->iv_nstate_arg = arg; 1979 vap->iv_flags_ext |= IEEE80211_FEXT_STATEWAIT; 1980 ieee80211_runtask(ic, &vap->iv_nstate_task); 1981 return EINPROGRESS; 1982} 1983 1984int 1985ieee80211_new_state(struct ieee80211vap *vap, 1986 enum ieee80211_state nstate, int arg) 1987{ 1988 struct ieee80211com *ic = vap->iv_ic; 1989 int rc; 1990 1991 IEEE80211_LOCK(ic); 1992 rc = ieee80211_new_state_locked(vap, nstate, arg); 1993 IEEE80211_UNLOCK(ic); 1994 return rc; 1995} 1996