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 #include <net80211/ieee80211_monitor.h> 54 #include <net80211/ieee80211_input.h> 55 56 /* XXX tunables */ 57 #define AGGRESSIVE_MODE_SWITCH_HYSTERESIS 3 /* pkts / 100ms */ 58 #define HIGH_PRI_SWITCH_THRESH 10 /* pkts / 100ms */ 59 60 const char *ieee80211_mgt_subtype_name[] = { 61 "assoc_req", "assoc_resp", "reassoc_req", "reassoc_resp", 62 "probe_req", "probe_resp", "reserved#6", "reserved#7", 63 "beacon", "atim", "disassoc", "auth", 64 "deauth", "action", "reserved#14", "reserved#15" 65 }; 66 const char *ieee80211_ctl_subtype_name[] = { 67 "reserved#0", "reserved#1", "reserved#2", "reserved#3", 68 "reserved#3", "reserved#5", "reserved#6", "reserved#7", 69 "reserved#8", "reserved#9", "ps_poll", "rts", 70 "cts", "ack", "cf_end", "cf_end_ack" 71 }; 72 const char *ieee80211_opmode_name[IEEE80211_OPMODE_MAX] = { 73 "IBSS", /* IEEE80211_M_IBSS */ 74 "STA", /* IEEE80211_M_STA */ 75 "WDS", /* IEEE80211_M_WDS */ 76 "AHDEMO", /* IEEE80211_M_AHDEMO */ 77 "HOSTAP", /* IEEE80211_M_HOSTAP */ 78 "MONITOR" /* IEEE80211_M_MONITOR */ 79 }; 80 const char *ieee80211_state_name[IEEE80211_S_MAX] = { 81 "INIT", /* IEEE80211_S_INIT */ 82 "SCAN", /* IEEE80211_S_SCAN */ 83 "AUTH", /* IEEE80211_S_AUTH */ 84 "ASSOC", /* IEEE80211_S_ASSOC */ 85 "CAC", /* IEEE80211_S_CAC */ 86 "RUN", /* IEEE80211_S_RUN */ 87 "CSA", /* IEEE80211_S_CSA */ 88 "SLEEP", /* IEEE80211_S_SLEEP */ 89 }; 90 const char *ieee80211_wme_acnames[] = { 91 "WME_AC_BE", 92 "WME_AC_BK", 93 "WME_AC_VI", 94 "WME_AC_VO", 95 "WME_UPSD", 96 }; 97 98 static void beacon_miss(void *, int); 99 static void beacon_swmiss(void *, int); 100 static void parent_updown(void *, int); 101 static void update_mcast(void *, int); 102 static void update_promisc(void *, int); 103 static void update_channel(void *, int); 104 static void ieee80211_newstate_cb(void *, int); 105 static int ieee80211_new_state_locked(struct ieee80211vap *, 106 enum ieee80211_state, int); 107 108 static int 109 null_raw_xmit(struct ieee80211_node *ni, struct mbuf *m, 110 const struct ieee80211_bpf_params *params) 111 { 112 struct ifnet *ifp = ni->ni_ic->ic_ifp; 113 114 if_printf(ifp, "missing ic_raw_xmit callback, drop frame\n"); 115 m_freem(m); 116 return ENETDOWN; 117 } 118 119 void 120 ieee80211_proto_attach(struct ieee80211com *ic) 121 { 122 struct ifnet *ifp = ic->ic_ifp; 123 124 /* override the 802.3 setting */ 125 ifp->if_hdrlen = ic->ic_headroom 126 + sizeof(struct ieee80211_qosframe_addr4) 127 + IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN 128 + IEEE80211_WEP_EXTIVLEN; 129 /* XXX no way to recalculate on ifdetach */ 130 if (ALIGN(ifp->if_hdrlen) > max_linkhdr) { 131 /* XXX sanity check... */ 132 max_linkhdr = ALIGN(ifp->if_hdrlen); 133 max_hdr = max_linkhdr + max_protohdr; 134 max_datalen = MHLEN - max_hdr; 135 } 136 ic->ic_protmode = IEEE80211_PROT_CTSONLY; 137 138 TASK_INIT(&ic->ic_parent_task, 0, parent_updown, ifp); 139 TASK_INIT(&ic->ic_mcast_task, 0, update_mcast, ic); 140 TASK_INIT(&ic->ic_promisc_task, 0, update_promisc, ic); 141 TASK_INIT(&ic->ic_chan_task, 0, update_channel, ic); 142 TASK_INIT(&ic->ic_bmiss_task, 0, beacon_miss, ic); 143 144 ic->ic_wme.wme_hipri_switch_hysteresis = 145 AGGRESSIVE_MODE_SWITCH_HYSTERESIS; 146 147 /* initialize management frame handlers */ 148 ic->ic_send_mgmt = ieee80211_send_mgmt; 149 ic->ic_raw_xmit = null_raw_xmit; 150 151 ieee80211_adhoc_attach(ic); 152 ieee80211_sta_attach(ic); 153 ieee80211_wds_attach(ic); 154 ieee80211_hostap_attach(ic); 155 ieee80211_monitor_attach(ic); 156 } 157 158 void 159 ieee80211_proto_detach(struct ieee80211com *ic) 160 { 161 ieee80211_monitor_detach(ic); 162 ieee80211_hostap_detach(ic); 163 ieee80211_wds_detach(ic); 164 ieee80211_adhoc_detach(ic); 165 ieee80211_sta_detach(ic); 166 } 167 168 static void 169 null_update_beacon(struct ieee80211vap *vap, int item) 170 { 171 } 172 173 void 174 ieee80211_proto_vattach(struct ieee80211vap *vap) 175 { 176 struct ieee80211com *ic = vap->iv_ic; 177 struct ifnet *ifp = vap->iv_ifp; 178 int i; 179 180 /* override the 802.3 setting */ 181 ifp->if_hdrlen = ic->ic_ifp->if_hdrlen; 182 183 vap->iv_rtsthreshold = IEEE80211_RTS_DEFAULT; 184 vap->iv_fragthreshold = IEEE80211_FRAG_DEFAULT; 185 vap->iv_bmiss_max = IEEE80211_BMISS_MAX; 186 callout_init(&vap->iv_swbmiss, CALLOUT_MPSAFE); 187 callout_init(&vap->iv_mgtsend, CALLOUT_MPSAFE); 188 TASK_INIT(&vap->iv_nstate_task, 0, ieee80211_newstate_cb, vap); 189 TASK_INIT(&vap->iv_swbmiss_task, 0, beacon_swmiss, vap); 190 /* 191 * Install default tx rate handling: no fixed rate, lowest 192 * supported rate for mgmt and multicast frames. Default 193 * max retry count. These settings can be changed by the 194 * driver and/or user applications. 195 */ 196 for (i = IEEE80211_MODE_11A; i < IEEE80211_MODE_MAX; i++) { 197 const struct ieee80211_rateset *rs = &ic->ic_sup_rates[i]; 198 199 vap->iv_txparms[i].ucastrate = IEEE80211_FIXED_RATE_NONE; 200 if (i == IEEE80211_MODE_11NA || i == IEEE80211_MODE_11NG) { 201 vap->iv_txparms[i].mgmtrate = 0 | IEEE80211_RATE_MCS; 202 vap->iv_txparms[i].mcastrate = 0 | IEEE80211_RATE_MCS; 203 } else { 204 vap->iv_txparms[i].mgmtrate = 205 rs->rs_rates[0] & IEEE80211_RATE_VAL; 206 vap->iv_txparms[i].mcastrate = 207 rs->rs_rates[0] & IEEE80211_RATE_VAL; 208 } 209 vap->iv_txparms[i].maxretry = IEEE80211_TXMAX_DEFAULT; 210 } 211 vap->iv_roaming = IEEE80211_ROAMING_AUTO; 212 213 vap->iv_update_beacon = null_update_beacon; 214 vap->iv_deliver_data = ieee80211_deliver_data; 215 216 /* attach support for operating mode */ 217 ic->ic_vattach[vap->iv_opmode](vap); 218 } 219 220 void 221 ieee80211_proto_vdetach(struct ieee80211vap *vap) 222 { 223 #define FREEAPPIE(ie) do { \ 224 if (ie != NULL) \ 225 free(ie, M_80211_NODE_IE); \ 226 } while (0) 227 /* 228 * Detach operating mode module. 229 */ 230 if (vap->iv_opdetach != NULL) 231 vap->iv_opdetach(vap); 232 /* 233 * This should not be needed as we detach when reseting 234 * the state but be conservative here since the 235 * authenticator may do things like spawn kernel threads. 236 */ 237 if (vap->iv_auth->ia_detach != NULL) 238 vap->iv_auth->ia_detach(vap); 239 /* 240 * Detach any ACL'ator. 241 */ 242 if (vap->iv_acl != NULL) 243 vap->iv_acl->iac_detach(vap); 244 245 FREEAPPIE(vap->iv_appie_beacon); 246 FREEAPPIE(vap->iv_appie_probereq); 247 FREEAPPIE(vap->iv_appie_proberesp); 248 FREEAPPIE(vap->iv_appie_assocreq); 249 FREEAPPIE(vap->iv_appie_assocresp); 250 FREEAPPIE(vap->iv_appie_wpa); 251 #undef FREEAPPIE 252 } 253 254 /* 255 * Simple-minded authenticator module support. 256 */ 257 258 #define IEEE80211_AUTH_MAX (IEEE80211_AUTH_WPA+1) 259 /* XXX well-known names */ 260 static const char *auth_modnames[IEEE80211_AUTH_MAX] = { 261 "wlan_internal", /* IEEE80211_AUTH_NONE */ 262 "wlan_internal", /* IEEE80211_AUTH_OPEN */ 263 "wlan_internal", /* IEEE80211_AUTH_SHARED */ 264 "wlan_xauth", /* IEEE80211_AUTH_8021X */ 265 "wlan_internal", /* IEEE80211_AUTH_AUTO */ 266 "wlan_xauth", /* IEEE80211_AUTH_WPA */ 267 }; 268 static const struct ieee80211_authenticator *authenticators[IEEE80211_AUTH_MAX]; 269 270 static const struct ieee80211_authenticator auth_internal = { 271 .ia_name = "wlan_internal", 272 .ia_attach = NULL, 273 .ia_detach = NULL, 274 .ia_node_join = NULL, 275 .ia_node_leave = NULL, 276 }; 277 278 /* 279 * Setup internal authenticators once; they are never unregistered. 280 */ 281 static void 282 ieee80211_auth_setup(void) 283 { 284 ieee80211_authenticator_register(IEEE80211_AUTH_OPEN, &auth_internal); 285 ieee80211_authenticator_register(IEEE80211_AUTH_SHARED, &auth_internal); 286 ieee80211_authenticator_register(IEEE80211_AUTH_AUTO, &auth_internal); 287 } 288 SYSINIT(wlan_auth, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_auth_setup, NULL); 289 290 const struct ieee80211_authenticator * 291 ieee80211_authenticator_get(int auth) 292 { 293 if (auth >= IEEE80211_AUTH_MAX) 294 return NULL; 295 if (authenticators[auth] == NULL) 296 ieee80211_load_module(auth_modnames[auth]); 297 return authenticators[auth]; 298 } 299 300 void 301 ieee80211_authenticator_register(int type, 302 const struct ieee80211_authenticator *auth) 303 { 304 if (type >= IEEE80211_AUTH_MAX) 305 return; 306 authenticators[type] = auth; 307 } 308 309 void 310 ieee80211_authenticator_unregister(int type) 311 { 312 313 if (type >= IEEE80211_AUTH_MAX) 314 return; 315 authenticators[type] = NULL; 316 } 317 318 /* 319 * Very simple-minded ACL module support. 320 */ 321 /* XXX just one for now */ 322 static const struct ieee80211_aclator *acl = NULL; 323 324 void 325 ieee80211_aclator_register(const struct ieee80211_aclator *iac) 326 { 327 printf("wlan: %s acl policy registered\n", iac->iac_name); 328 acl = iac; 329 } 330 331 void 332 ieee80211_aclator_unregister(const struct ieee80211_aclator *iac) 333 { 334 if (acl == iac) 335 acl = NULL; 336 printf("wlan: %s acl policy unregistered\n", iac->iac_name); 337 } 338 339 const struct ieee80211_aclator * 340 ieee80211_aclator_get(const char *name) 341 { 342 if (acl == NULL) 343 ieee80211_load_module("wlan_acl"); 344 return acl != NULL && strcmp(acl->iac_name, name) == 0 ? acl : NULL; 345 } 346 347 void 348 ieee80211_print_essid(const uint8_t *essid, int len) 349 { 350 const uint8_t *p; 351 int i; 352 353 if (len > IEEE80211_NWID_LEN) 354 len = IEEE80211_NWID_LEN; 355 /* determine printable or not */ 356 for (i = 0, p = essid; i < len; i++, p++) { 357 if (*p < ' ' || *p > 0x7e) 358 break; 359 } 360 if (i == len) { 361 printf("\""); 362 for (i = 0, p = essid; i < len; i++, p++) 363 printf("%c", *p); 364 printf("\""); 365 } else { 366 printf("0x"); 367 for (i = 0, p = essid; i < len; i++, p++) 368 printf("%02x", *p); 369 } 370 } 371 372 void 373 ieee80211_dump_pkt(struct ieee80211com *ic, 374 const uint8_t *buf, int len, int rate, int rssi) 375 { 376 const struct ieee80211_frame *wh; 377 int i; 378 379 wh = (const struct ieee80211_frame *)buf; 380 switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) { 381 case IEEE80211_FC1_DIR_NODS: 382 printf("NODS %s", ether_sprintf(wh->i_addr2)); 383 printf("->%s", ether_sprintf(wh->i_addr1)); 384 printf("(%s)", ether_sprintf(wh->i_addr3)); 385 break; 386 case IEEE80211_FC1_DIR_TODS: 387 printf("TODS %s", ether_sprintf(wh->i_addr2)); 388 printf("->%s", ether_sprintf(wh->i_addr3)); 389 printf("(%s)", ether_sprintf(wh->i_addr1)); 390 break; 391 case IEEE80211_FC1_DIR_FROMDS: 392 printf("FRDS %s", ether_sprintf(wh->i_addr3)); 393 printf("->%s", ether_sprintf(wh->i_addr1)); 394 printf("(%s)", ether_sprintf(wh->i_addr2)); 395 break; 396 case IEEE80211_FC1_DIR_DSTODS: 397 printf("DSDS %s", ether_sprintf((const uint8_t *)&wh[1])); 398 printf("->%s", ether_sprintf(wh->i_addr3)); 399 printf("(%s", ether_sprintf(wh->i_addr2)); 400 printf("->%s)", ether_sprintf(wh->i_addr1)); 401 break; 402 } 403 switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) { 404 case IEEE80211_FC0_TYPE_DATA: 405 printf(" data"); 406 break; 407 case IEEE80211_FC0_TYPE_MGT: 408 printf(" %s", ieee80211_mgt_subtype_name[ 409 (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) 410 >> IEEE80211_FC0_SUBTYPE_SHIFT]); 411 break; 412 default: 413 printf(" type#%d", wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK); 414 break; 415 } 416 if (IEEE80211_QOS_HAS_SEQ(wh)) { 417 const struct ieee80211_qosframe *qwh = 418 (const struct ieee80211_qosframe *)buf; 419 printf(" QoS [TID %u%s]", qwh->i_qos[0] & IEEE80211_QOS_TID, 420 qwh->i_qos[0] & IEEE80211_QOS_ACKPOLICY ? " ACM" : ""); 421 } 422 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 423 int off; 424 425 off = ieee80211_anyhdrspace(ic, wh); 426 printf(" WEP [IV %.02x %.02x %.02x", 427 buf[off+0], buf[off+1], buf[off+2]); 428 if (buf[off+IEEE80211_WEP_IVLEN] & IEEE80211_WEP_EXTIV) 429 printf(" %.02x %.02x %.02x", 430 buf[off+4], buf[off+5], buf[off+6]); 431 printf(" KID %u]", buf[off+IEEE80211_WEP_IVLEN] >> 6); 432 } 433 if (rate >= 0) 434 printf(" %dM", rate / 2); 435 if (rssi >= 0) 436 printf(" +%d", rssi); 437 printf("\n"); 438 if (len > 0) { 439 for (i = 0; i < len; i++) { 440 if ((i & 1) == 0) 441 printf(" "); 442 printf("%02x", buf[i]); 443 } 444 printf("\n"); 445 } 446 } 447 448 static __inline int 449 findrix(const struct ieee80211_rateset *rs, int r) 450 { 451 int i; 452 453 for (i = 0; i < rs->rs_nrates; i++) 454 if ((rs->rs_rates[i] & IEEE80211_RATE_VAL) == r) 455 return i; 456 return -1; 457 } 458 459 int 460 ieee80211_fix_rate(struct ieee80211_node *ni, 461 struct ieee80211_rateset *nrs, int flags) 462 { 463 #define RV(v) ((v) & IEEE80211_RATE_VAL) 464 struct ieee80211vap *vap = ni->ni_vap; 465 struct ieee80211com *ic = ni->ni_ic; 466 int i, j, rix, error; 467 int okrate, badrate, fixedrate, ucastrate; 468 const struct ieee80211_rateset *srs; 469 uint8_t r; 470 471 error = 0; 472 okrate = badrate = 0; 473 ucastrate = vap->iv_txparms[ieee80211_chan2mode(ni->ni_chan)].ucastrate; 474 if (ucastrate != IEEE80211_FIXED_RATE_NONE) { 475 /* 476 * Workaround awkwardness with fixed rate. We are called 477 * to check both the legacy rate set and the HT rate set 478 * but we must apply any legacy fixed rate check only to the 479 * legacy rate set and vice versa. We cannot tell what type 480 * of rate set we've been given (legacy or HT) but we can 481 * distinguish the fixed rate type (MCS have 0x80 set). 482 * So to deal with this the caller communicates whether to 483 * check MCS or legacy rate using the flags and we use the 484 * type of any fixed rate to avoid applying an MCS to a 485 * legacy rate and vice versa. 486 */ 487 if (ucastrate & 0x80) { 488 if (flags & IEEE80211_F_DOFRATE) 489 flags &= ~IEEE80211_F_DOFRATE; 490 } else if ((ucastrate & 0x80) == 0) { 491 if (flags & IEEE80211_F_DOFMCS) 492 flags &= ~IEEE80211_F_DOFMCS; 493 } 494 /* NB: required to make MCS match below work */ 495 ucastrate &= IEEE80211_RATE_VAL; 496 } 497 fixedrate = IEEE80211_FIXED_RATE_NONE; 498 /* 499 * XXX we are called to process both MCS and legacy rates; 500 * we must use the appropriate basic rate set or chaos will 501 * ensue; for now callers that want MCS must supply 502 * IEEE80211_F_DOBRS; at some point we'll need to split this 503 * function so there are two variants, one for MCS and one 504 * for legacy rates. 505 */ 506 if (flags & IEEE80211_F_DOBRS) 507 srs = (const struct ieee80211_rateset *) 508 ieee80211_get_suphtrates(ic, ni->ni_chan); 509 else 510 srs = ieee80211_get_suprates(ic, ni->ni_chan); 511 for (i = 0; i < nrs->rs_nrates; ) { 512 if (flags & IEEE80211_F_DOSORT) { 513 /* 514 * Sort rates. 515 */ 516 for (j = i + 1; j < nrs->rs_nrates; j++) { 517 if (RV(nrs->rs_rates[i]) > RV(nrs->rs_rates[j])) { 518 r = nrs->rs_rates[i]; 519 nrs->rs_rates[i] = nrs->rs_rates[j]; 520 nrs->rs_rates[j] = r; 521 } 522 } 523 } 524 r = nrs->rs_rates[i] & IEEE80211_RATE_VAL; 525 badrate = r; 526 /* 527 * Check for fixed rate. 528 */ 529 if (r == ucastrate) 530 fixedrate = r; 531 /* 532 * Check against supported rates. 533 */ 534 rix = findrix(srs, r); 535 if (flags & IEEE80211_F_DONEGO) { 536 if (rix < 0) { 537 /* 538 * A rate in the node's rate set is not 539 * supported. If this is a basic rate and we 540 * are operating as a STA then this is an error. 541 * Otherwise we just discard/ignore the rate. 542 */ 543 if ((flags & IEEE80211_F_JOIN) && 544 (nrs->rs_rates[i] & IEEE80211_RATE_BASIC)) 545 error++; 546 } else if ((flags & IEEE80211_F_JOIN) == 0) { 547 /* 548 * Overwrite with the supported rate 549 * value so any basic rate bit is set. 550 */ 551 nrs->rs_rates[i] = srs->rs_rates[rix]; 552 } 553 } 554 if ((flags & IEEE80211_F_DODEL) && rix < 0) { 555 /* 556 * Delete unacceptable rates. 557 */ 558 nrs->rs_nrates--; 559 for (j = i; j < nrs->rs_nrates; j++) 560 nrs->rs_rates[j] = nrs->rs_rates[j + 1]; 561 nrs->rs_rates[j] = 0; 562 continue; 563 } 564 if (rix >= 0) 565 okrate = nrs->rs_rates[i]; 566 i++; 567 } 568 if (okrate == 0 || error != 0 || 569 ((flags & (IEEE80211_F_DOFRATE|IEEE80211_F_DOFMCS)) && 570 fixedrate != ucastrate)) { 571 IEEE80211_NOTE(vap, IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni, 572 "%s: flags 0x%x okrate %d error %d fixedrate 0x%x " 573 "ucastrate %x\n", __func__, fixedrate, ucastrate, flags); 574 return badrate | IEEE80211_RATE_BASIC; 575 } else 576 return RV(okrate); 577 #undef RV 578 } 579 580 /* 581 * Reset 11g-related state. 582 */ 583 void 584 ieee80211_reset_erp(struct ieee80211com *ic) 585 { 586 ic->ic_flags &= ~IEEE80211_F_USEPROT; 587 ic->ic_nonerpsta = 0; 588 ic->ic_longslotsta = 0; 589 /* 590 * Short slot time is enabled only when operating in 11g 591 * and not in an IBSS. We must also honor whether or not 592 * the driver is capable of doing it. 593 */ 594 ieee80211_set_shortslottime(ic, 595 IEEE80211_IS_CHAN_A(ic->ic_curchan) || 596 IEEE80211_IS_CHAN_HT(ic->ic_curchan) || 597 (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 598 ic->ic_opmode == IEEE80211_M_HOSTAP && 599 (ic->ic_caps & IEEE80211_C_SHSLOT))); 600 /* 601 * Set short preamble and ERP barker-preamble flags. 602 */ 603 if (IEEE80211_IS_CHAN_A(ic->ic_curchan) || 604 (ic->ic_caps & IEEE80211_C_SHPREAMBLE)) { 605 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 606 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 607 } else { 608 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 609 ic->ic_flags |= IEEE80211_F_USEBARKER; 610 } 611 } 612 613 /* 614 * Set the short slot time state and notify the driver. 615 */ 616 void 617 ieee80211_set_shortslottime(struct ieee80211com *ic, int onoff) 618 { 619 if (onoff) 620 ic->ic_flags |= IEEE80211_F_SHSLOT; 621 else 622 ic->ic_flags &= ~IEEE80211_F_SHSLOT; 623 /* notify driver */ 624 if (ic->ic_updateslot != NULL) 625 ic->ic_updateslot(ic->ic_ifp); 626 } 627 628 /* 629 * Check if the specified rate set supports ERP. 630 * NB: the rate set is assumed to be sorted. 631 */ 632 int 633 ieee80211_iserp_rateset(const struct ieee80211_rateset *rs) 634 { 635 #define N(a) (sizeof(a) / sizeof(a[0])) 636 static const int rates[] = { 2, 4, 11, 22, 12, 24, 48 }; 637 int i, j; 638 639 if (rs->rs_nrates < N(rates)) 640 return 0; 641 for (i = 0; i < N(rates); i++) { 642 for (j = 0; j < rs->rs_nrates; j++) { 643 int r = rs->rs_rates[j] & IEEE80211_RATE_VAL; 644 if (rates[i] == r) 645 goto next; 646 if (r > rates[i]) 647 return 0; 648 } 649 return 0; 650 next: 651 ; 652 } 653 return 1; 654 #undef N 655 } 656 657 /* 658 * Mark the basic rates for the rate table based on the 659 * operating mode. For real 11g we mark all the 11b rates 660 * and 6, 12, and 24 OFDM. For 11b compatibility we mark only 661 * 11b rates. There's also a pseudo 11a-mode used to mark only 662 * the basic OFDM rates. 663 */ 664 static void 665 setbasicrates(struct ieee80211_rateset *rs, 666 enum ieee80211_phymode mode, int add) 667 { 668 static const struct ieee80211_rateset basic[IEEE80211_MODE_MAX] = { 669 [IEEE80211_MODE_11A] = { 3, { 12, 24, 48 } }, 670 [IEEE80211_MODE_11B] = { 2, { 2, 4 } }, 671 /* NB: mixed b/g */ 672 [IEEE80211_MODE_11G] = { 4, { 2, 4, 11, 22 } }, 673 [IEEE80211_MODE_TURBO_A] = { 3, { 12, 24, 48 } }, 674 [IEEE80211_MODE_TURBO_G] = { 4, { 2, 4, 11, 22 } }, 675 [IEEE80211_MODE_STURBO_A] = { 3, { 12, 24, 48 } }, 676 [IEEE80211_MODE_HALF] = { 3, { 6, 12, 24 } }, 677 [IEEE80211_MODE_QUARTER] = { 3, { 3, 6, 12 } }, 678 [IEEE80211_MODE_11NA] = { 3, { 12, 24, 48 } }, 679 /* NB: mixed b/g */ 680 [IEEE80211_MODE_11NG] = { 4, { 2, 4, 11, 22 } }, 681 }; 682 int i, j; 683 684 for (i = 0; i < rs->rs_nrates; i++) { 685 if (!add) 686 rs->rs_rates[i] &= IEEE80211_RATE_VAL; 687 for (j = 0; j < basic[mode].rs_nrates; j++) 688 if (basic[mode].rs_rates[j] == rs->rs_rates[i]) { 689 rs->rs_rates[i] |= IEEE80211_RATE_BASIC; 690 break; 691 } 692 } 693 } 694 695 /* 696 * Set the basic rates in a rate set. 697 */ 698 void 699 ieee80211_setbasicrates(struct ieee80211_rateset *rs, 700 enum ieee80211_phymode mode) 701 { 702 setbasicrates(rs, mode, 0); 703 } 704 705 /* 706 * Add basic rates to a rate set. 707 */ 708 void 709 ieee80211_addbasicrates(struct ieee80211_rateset *rs, 710 enum ieee80211_phymode mode) 711 { 712 setbasicrates(rs, mode, 1); 713 } 714 715 /* 716 * WME protocol support. 717 * 718 * The default 11a/b/g/n parameters come from the WiFi Alliance WMM 719 * System Interopability Test Plan (v1.4, Appendix F) and the 802.11n 720 * Draft 2.0 Test Plan (Appendix D). 721 * 722 * Static/Dynamic Turbo mode settings come from Atheros. 723 */ 724 typedef struct phyParamType { 725 uint8_t aifsn; 726 uint8_t logcwmin; 727 uint8_t logcwmax; 728 uint16_t txopLimit; 729 uint8_t acm; 730 } paramType; 731 732 static const struct phyParamType phyParamForAC_BE[IEEE80211_MODE_MAX] = { 733 [IEEE80211_MODE_AUTO] = { 3, 4, 6, 0, 0 }, 734 [IEEE80211_MODE_11A] = { 3, 4, 6, 0, 0 }, 735 [IEEE80211_MODE_11B] = { 3, 4, 6, 0, 0 }, 736 [IEEE80211_MODE_11G] = { 3, 4, 6, 0, 0 }, 737 [IEEE80211_MODE_FH] = { 3, 4, 6, 0, 0 }, 738 [IEEE80211_MODE_TURBO_A]= { 2, 3, 5, 0, 0 }, 739 [IEEE80211_MODE_TURBO_G]= { 2, 3, 5, 0, 0 }, 740 [IEEE80211_MODE_STURBO_A]={ 2, 3, 5, 0, 0 }, 741 [IEEE80211_MODE_HALF] = { 3, 4, 6, 0, 0 }, 742 [IEEE80211_MODE_QUARTER]= { 3, 4, 6, 0, 0 }, 743 [IEEE80211_MODE_11NA] = { 3, 4, 6, 0, 0 }, 744 [IEEE80211_MODE_11NG] = { 3, 4, 6, 0, 0 }, 745 }; 746 static const struct phyParamType phyParamForAC_BK[IEEE80211_MODE_MAX] = { 747 [IEEE80211_MODE_AUTO] = { 7, 4, 10, 0, 0 }, 748 [IEEE80211_MODE_11A] = { 7, 4, 10, 0, 0 }, 749 [IEEE80211_MODE_11B] = { 7, 4, 10, 0, 0 }, 750 [IEEE80211_MODE_11G] = { 7, 4, 10, 0, 0 }, 751 [IEEE80211_MODE_FH] = { 7, 4, 10, 0, 0 }, 752 [IEEE80211_MODE_TURBO_A]= { 7, 3, 10, 0, 0 }, 753 [IEEE80211_MODE_TURBO_G]= { 7, 3, 10, 0, 0 }, 754 [IEEE80211_MODE_STURBO_A]={ 7, 3, 10, 0, 0 }, 755 [IEEE80211_MODE_HALF] = { 7, 4, 10, 0, 0 }, 756 [IEEE80211_MODE_QUARTER]= { 7, 4, 10, 0, 0 }, 757 [IEEE80211_MODE_11NA] = { 7, 4, 10, 0, 0 }, 758 [IEEE80211_MODE_11NG] = { 7, 4, 10, 0, 0 }, 759 }; 760 static const struct phyParamType phyParamForAC_VI[IEEE80211_MODE_MAX] = { 761 [IEEE80211_MODE_AUTO] = { 1, 3, 4, 94, 0 }, 762 [IEEE80211_MODE_11A] = { 1, 3, 4, 94, 0 }, 763 [IEEE80211_MODE_11B] = { 1, 3, 4, 188, 0 }, 764 [IEEE80211_MODE_11G] = { 1, 3, 4, 94, 0 }, 765 [IEEE80211_MODE_FH] = { 1, 3, 4, 188, 0 }, 766 [IEEE80211_MODE_TURBO_A]= { 1, 2, 3, 94, 0 }, 767 [IEEE80211_MODE_TURBO_G]= { 1, 2, 3, 94, 0 }, 768 [IEEE80211_MODE_STURBO_A]={ 1, 2, 3, 94, 0 }, 769 [IEEE80211_MODE_HALF] = { 1, 3, 4, 94, 0 }, 770 [IEEE80211_MODE_QUARTER]= { 1, 3, 4, 94, 0 }, 771 [IEEE80211_MODE_11NA] = { 1, 3, 4, 94, 0 }, 772 [IEEE80211_MODE_11NG] = { 1, 3, 4, 94, 0 }, 773 }; 774 static const struct phyParamType phyParamForAC_VO[IEEE80211_MODE_MAX] = { 775 [IEEE80211_MODE_AUTO] = { 1, 2, 3, 47, 0 }, 776 [IEEE80211_MODE_11A] = { 1, 2, 3, 47, 0 }, 777 [IEEE80211_MODE_11B] = { 1, 2, 3, 102, 0 }, 778 [IEEE80211_MODE_11G] = { 1, 2, 3, 47, 0 }, 779 [IEEE80211_MODE_FH] = { 1, 2, 3, 102, 0 }, 780 [IEEE80211_MODE_TURBO_A]= { 1, 2, 2, 47, 0 }, 781 [IEEE80211_MODE_TURBO_G]= { 1, 2, 2, 47, 0 }, 782 [IEEE80211_MODE_STURBO_A]={ 1, 2, 2, 47, 0 }, 783 [IEEE80211_MODE_HALF] = { 1, 2, 3, 47, 0 }, 784 [IEEE80211_MODE_QUARTER]= { 1, 2, 3, 47, 0 }, 785 [IEEE80211_MODE_11NA] = { 1, 2, 3, 47, 0 }, 786 [IEEE80211_MODE_11NG] = { 1, 2, 3, 47, 0 }, 787 }; 788 789 static const struct phyParamType bssPhyParamForAC_BE[IEEE80211_MODE_MAX] = { 790 [IEEE80211_MODE_AUTO] = { 3, 4, 10, 0, 0 }, 791 [IEEE80211_MODE_11A] = { 3, 4, 10, 0, 0 }, 792 [IEEE80211_MODE_11B] = { 3, 4, 10, 0, 0 }, 793 [IEEE80211_MODE_11G] = { 3, 4, 10, 0, 0 }, 794 [IEEE80211_MODE_FH] = { 3, 4, 10, 0, 0 }, 795 [IEEE80211_MODE_TURBO_A]= { 2, 3, 10, 0, 0 }, 796 [IEEE80211_MODE_TURBO_G]= { 2, 3, 10, 0, 0 }, 797 [IEEE80211_MODE_STURBO_A]={ 2, 3, 10, 0, 0 }, 798 [IEEE80211_MODE_HALF] = { 3, 4, 10, 0, 0 }, 799 [IEEE80211_MODE_QUARTER]= { 3, 4, 10, 0, 0 }, 800 [IEEE80211_MODE_11NA] = { 3, 4, 10, 0, 0 }, 801 [IEEE80211_MODE_11NG] = { 3, 4, 10, 0, 0 }, 802 }; 803 static const struct phyParamType bssPhyParamForAC_VI[IEEE80211_MODE_MAX] = { 804 [IEEE80211_MODE_AUTO] = { 2, 3, 4, 94, 0 }, 805 [IEEE80211_MODE_11A] = { 2, 3, 4, 94, 0 }, 806 [IEEE80211_MODE_11B] = { 2, 3, 4, 188, 0 }, 807 [IEEE80211_MODE_11G] = { 2, 3, 4, 94, 0 }, 808 [IEEE80211_MODE_FH] = { 2, 3, 4, 188, 0 }, 809 [IEEE80211_MODE_TURBO_A]= { 2, 2, 3, 94, 0 }, 810 [IEEE80211_MODE_TURBO_G]= { 2, 2, 3, 94, 0 }, 811 [IEEE80211_MODE_STURBO_A]={ 2, 2, 3, 94, 0 }, 812 [IEEE80211_MODE_HALF] = { 2, 3, 4, 94, 0 }, 813 [IEEE80211_MODE_QUARTER]= { 2, 3, 4, 94, 0 }, 814 [IEEE80211_MODE_11NA] = { 2, 3, 4, 94, 0 }, 815 [IEEE80211_MODE_11NG] = { 2, 3, 4, 94, 0 }, 816 }; 817 static const struct phyParamType bssPhyParamForAC_VO[IEEE80211_MODE_MAX] = { 818 [IEEE80211_MODE_AUTO] = { 2, 2, 3, 47, 0 }, 819 [IEEE80211_MODE_11A] = { 2, 2, 3, 47, 0 }, 820 [IEEE80211_MODE_11B] = { 2, 2, 3, 102, 0 }, 821 [IEEE80211_MODE_11G] = { 2, 2, 3, 47, 0 }, 822 [IEEE80211_MODE_FH] = { 2, 2, 3, 102, 0 }, 823 [IEEE80211_MODE_TURBO_A]= { 1, 2, 2, 47, 0 }, 824 [IEEE80211_MODE_TURBO_G]= { 1, 2, 2, 47, 0 }, 825 [IEEE80211_MODE_STURBO_A]={ 1, 2, 2, 47, 0 }, 826 [IEEE80211_MODE_HALF] = { 2, 2, 3, 47, 0 }, 827 [IEEE80211_MODE_QUARTER]= { 2, 2, 3, 47, 0 }, 828 [IEEE80211_MODE_11NA] = { 2, 2, 3, 47, 0 }, 829 [IEEE80211_MODE_11NG] = { 2, 2, 3, 47, 0 }, 830 }; 831 832 static void 833 _setifsparams(struct wmeParams *wmep, const paramType *phy) 834 { 835 wmep->wmep_aifsn = phy->aifsn; 836 wmep->wmep_logcwmin = phy->logcwmin; 837 wmep->wmep_logcwmax = phy->logcwmax; 838 wmep->wmep_txopLimit = phy->txopLimit; 839 } 840 841 static void 842 setwmeparams(struct ieee80211vap *vap, const char *type, int ac, 843 struct wmeParams *wmep, const paramType *phy) 844 { 845 wmep->wmep_acm = phy->acm; 846 _setifsparams(wmep, phy); 847 848 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 849 "set %s (%s) [acm %u aifsn %u logcwmin %u logcwmax %u txop %u]\n", 850 ieee80211_wme_acnames[ac], type, 851 wmep->wmep_acm, wmep->wmep_aifsn, wmep->wmep_logcwmin, 852 wmep->wmep_logcwmax, wmep->wmep_txopLimit); 853 } 854 855 static void 856 ieee80211_wme_initparams_locked(struct ieee80211vap *vap) 857 { 858 struct ieee80211com *ic = vap->iv_ic; 859 struct ieee80211_wme_state *wme = &ic->ic_wme; 860 const paramType *pPhyParam, *pBssPhyParam; 861 struct wmeParams *wmep; 862 enum ieee80211_phymode mode; 863 int i; 864 865 IEEE80211_LOCK_ASSERT(ic); 866 867 if ((ic->ic_caps & IEEE80211_C_WME) == 0 || ic->ic_nrunning > 1) 868 return; 869 870 /* 871 * Select mode; we can be called early in which case we 872 * always use auto mode. We know we'll be called when 873 * entering the RUN state with bsschan setup properly 874 * so state will eventually get set correctly 875 */ 876 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC) 877 mode = ieee80211_chan2mode(ic->ic_bsschan); 878 else 879 mode = IEEE80211_MODE_AUTO; 880 for (i = 0; i < WME_NUM_AC; i++) { 881 switch (i) { 882 case WME_AC_BK: 883 pPhyParam = &phyParamForAC_BK[mode]; 884 pBssPhyParam = &phyParamForAC_BK[mode]; 885 break; 886 case WME_AC_VI: 887 pPhyParam = &phyParamForAC_VI[mode]; 888 pBssPhyParam = &bssPhyParamForAC_VI[mode]; 889 break; 890 case WME_AC_VO: 891 pPhyParam = &phyParamForAC_VO[mode]; 892 pBssPhyParam = &bssPhyParamForAC_VO[mode]; 893 break; 894 case WME_AC_BE: 895 default: 896 pPhyParam = &phyParamForAC_BE[mode]; 897 pBssPhyParam = &bssPhyParamForAC_BE[mode]; 898 break; 899 } 900 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i]; 901 if (ic->ic_opmode == IEEE80211_M_HOSTAP) { 902 setwmeparams(vap, "chan", i, wmep, pPhyParam); 903 } else { 904 setwmeparams(vap, "chan", i, wmep, pBssPhyParam); 905 } 906 wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i]; 907 setwmeparams(vap, "bss ", i, wmep, pBssPhyParam); 908 } 909 /* NB: check ic_bss to avoid NULL deref on initial attach */ 910 if (vap->iv_bss != NULL) { 911 /* 912 * Calculate agressive mode switching threshold based 913 * on beacon interval. This doesn't need locking since 914 * we're only called before entering the RUN state at 915 * which point we start sending beacon frames. 916 */ 917 wme->wme_hipri_switch_thresh = 918 (HIGH_PRI_SWITCH_THRESH * vap->iv_bss->ni_intval) / 100; 919 wme->wme_flags &= ~WME_F_AGGRMODE; 920 ieee80211_wme_updateparams(vap); 921 } 922 } 923 924 void 925 ieee80211_wme_initparams(struct ieee80211vap *vap) 926 { 927 struct ieee80211com *ic = vap->iv_ic; 928 929 IEEE80211_LOCK(ic); 930 ieee80211_wme_initparams_locked(vap); 931 IEEE80211_UNLOCK(ic); 932 } 933 934 /* 935 * Update WME parameters for ourself and the BSS. 936 */ 937 void 938 ieee80211_wme_updateparams_locked(struct ieee80211vap *vap) 939 { 940 static const paramType aggrParam[IEEE80211_MODE_MAX] = { 941 [IEEE80211_MODE_AUTO] = { 2, 4, 10, 64, 0 }, 942 [IEEE80211_MODE_11A] = { 2, 4, 10, 64, 0 }, 943 [IEEE80211_MODE_11B] = { 2, 5, 10, 64, 0 }, 944 [IEEE80211_MODE_11G] = { 2, 4, 10, 64, 0 }, 945 [IEEE80211_MODE_FH] = { 2, 5, 10, 64, 0 }, 946 [IEEE80211_MODE_TURBO_A] = { 1, 3, 10, 64, 0 }, 947 [IEEE80211_MODE_TURBO_G] = { 1, 3, 10, 64, 0 }, 948 [IEEE80211_MODE_STURBO_A] = { 1, 3, 10, 64, 0 }, 949 [IEEE80211_MODE_HALF] = { 2, 4, 10, 64, 0 }, 950 [IEEE80211_MODE_QUARTER] = { 2, 4, 10, 64, 0 }, 951 [IEEE80211_MODE_11NA] = { 2, 4, 10, 64, 0 }, /* XXXcheck*/ 952 [IEEE80211_MODE_11NG] = { 2, 4, 10, 64, 0 }, /* XXXcheck*/ 953 }; 954 struct ieee80211com *ic = vap->iv_ic; 955 struct ieee80211_wme_state *wme = &ic->ic_wme; 956 const struct wmeParams *wmep; 957 struct wmeParams *chanp, *bssp; 958 enum ieee80211_phymode mode; 959 int i; 960 961 /* 962 * Set up the channel access parameters for the physical 963 * device. First populate the configured settings. 964 */ 965 for (i = 0; i < WME_NUM_AC; i++) { 966 chanp = &wme->wme_chanParams.cap_wmeParams[i]; 967 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i]; 968 chanp->wmep_aifsn = wmep->wmep_aifsn; 969 chanp->wmep_logcwmin = wmep->wmep_logcwmin; 970 chanp->wmep_logcwmax = wmep->wmep_logcwmax; 971 chanp->wmep_txopLimit = wmep->wmep_txopLimit; 972 973 chanp = &wme->wme_bssChanParams.cap_wmeParams[i]; 974 wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i]; 975 chanp->wmep_aifsn = wmep->wmep_aifsn; 976 chanp->wmep_logcwmin = wmep->wmep_logcwmin; 977 chanp->wmep_logcwmax = wmep->wmep_logcwmax; 978 chanp->wmep_txopLimit = wmep->wmep_txopLimit; 979 } 980 981 /* 982 * Select mode; we can be called early in which case we 983 * always use auto mode. We know we'll be called when 984 * entering the RUN state with bsschan setup properly 985 * so state will eventually get set correctly 986 */ 987 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC) 988 mode = ieee80211_chan2mode(ic->ic_bsschan); 989 else 990 mode = IEEE80211_MODE_AUTO; 991 992 /* 993 * This implements agressive mode as found in certain 994 * vendors' AP's. When there is significant high 995 * priority (VI/VO) traffic in the BSS throttle back BE 996 * traffic by using conservative parameters. Otherwise 997 * BE uses agressive params to optimize performance of 998 * legacy/non-QoS traffic. 999 */ 1000 if ((vap->iv_opmode == IEEE80211_M_HOSTAP && 1001 (wme->wme_flags & WME_F_AGGRMODE) != 0) || 1002 (vap->iv_opmode == IEEE80211_M_STA && 1003 (vap->iv_bss->ni_flags & IEEE80211_NODE_QOS) == 0) || 1004 (vap->iv_flags & IEEE80211_F_WME) == 0) { 1005 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE]; 1006 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE]; 1007 1008 chanp->wmep_aifsn = bssp->wmep_aifsn = aggrParam[mode].aifsn; 1009 chanp->wmep_logcwmin = bssp->wmep_logcwmin = 1010 aggrParam[mode].logcwmin; 1011 chanp->wmep_logcwmax = bssp->wmep_logcwmax = 1012 aggrParam[mode].logcwmax; 1013 chanp->wmep_txopLimit = bssp->wmep_txopLimit = 1014 (vap->iv_flags & IEEE80211_F_BURST) ? 1015 aggrParam[mode].txopLimit : 0; 1016 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 1017 "update %s (chan+bss) [acm %u aifsn %u logcwmin %u " 1018 "logcwmax %u txop %u]\n", ieee80211_wme_acnames[WME_AC_BE], 1019 chanp->wmep_acm, chanp->wmep_aifsn, chanp->wmep_logcwmin, 1020 chanp->wmep_logcwmax, chanp->wmep_txopLimit); 1021 } 1022 1023 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 1024 ic->ic_sta_assoc < 2 && (wme->wme_flags & WME_F_AGGRMODE) != 0) { 1025 static const uint8_t logCwMin[IEEE80211_MODE_MAX] = { 1026 [IEEE80211_MODE_AUTO] = 3, 1027 [IEEE80211_MODE_11A] = 3, 1028 [IEEE80211_MODE_11B] = 4, 1029 [IEEE80211_MODE_11G] = 3, 1030 [IEEE80211_MODE_FH] = 4, 1031 [IEEE80211_MODE_TURBO_A] = 3, 1032 [IEEE80211_MODE_TURBO_G] = 3, 1033 [IEEE80211_MODE_STURBO_A] = 3, 1034 [IEEE80211_MODE_HALF] = 3, 1035 [IEEE80211_MODE_QUARTER] = 3, 1036 [IEEE80211_MODE_11NA] = 3, 1037 [IEEE80211_MODE_11NG] = 3, 1038 }; 1039 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE]; 1040 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE]; 1041 1042 chanp->wmep_logcwmin = bssp->wmep_logcwmin = logCwMin[mode]; 1043 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 1044 "update %s (chan+bss) logcwmin %u\n", 1045 ieee80211_wme_acnames[WME_AC_BE], chanp->wmep_logcwmin); 1046 } 1047 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { /* XXX ibss? */ 1048 /* 1049 * Arrange for a beacon update and bump the parameter 1050 * set number so associated stations load the new values. 1051 */ 1052 wme->wme_bssChanParams.cap_info = 1053 (wme->wme_bssChanParams.cap_info+1) & WME_QOSINFO_COUNT; 1054 ieee80211_beacon_notify(vap, IEEE80211_BEACON_WME); 1055 } 1056 1057 wme->wme_update(ic); 1058 1059 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 1060 "%s: WME params updated, cap_info 0x%x\n", __func__, 1061 vap->iv_opmode == IEEE80211_M_STA ? 1062 wme->wme_wmeChanParams.cap_info : 1063 wme->wme_bssChanParams.cap_info); 1064 } 1065 1066 void 1067 ieee80211_wme_updateparams(struct ieee80211vap *vap) 1068 { 1069 struct ieee80211com *ic = vap->iv_ic; 1070 1071 if (ic->ic_caps & IEEE80211_C_WME) { 1072 IEEE80211_LOCK(ic); 1073 ieee80211_wme_updateparams_locked(vap); 1074 IEEE80211_UNLOCK(ic); 1075 } 1076 } 1077 1078 static void 1079 parent_updown(void *arg, int npending) 1080 { 1081 struct ifnet *parent = arg; 1082 1083 parent->if_ioctl(parent, SIOCSIFFLAGS, NULL); 1084 } 1085 1086 static void 1087 update_mcast(void *arg, int npending) 1088 { 1089 struct ieee80211com *ic = arg; 1090 struct ifnet *parent = ic->ic_ifp; 1091 1092 ic->ic_update_mcast(parent); 1093 } 1094 1095 static void 1096 update_promisc(void *arg, int npending) 1097 { 1098 struct ieee80211com *ic = arg; 1099 struct ifnet *parent = ic->ic_ifp; 1100 1101 ic->ic_update_promisc(parent); 1102 } 1103 1104 static void 1105 update_channel(void *arg, int npending) 1106 { 1107 struct ieee80211com *ic = arg; 1108 1109 ic->ic_set_channel(ic); 1110 } 1111 1112 /* 1113 * Block until the parent is in a known state. This is 1114 * used after any operations that dispatch a task (e.g. 1115 * to auto-configure the parent device up/down). 1116 */ 1117 void 1118 ieee80211_waitfor_parent(struct ieee80211com *ic) 1119 { 1120 taskqueue_block(ic->ic_tq); 1121 ieee80211_draintask(ic, &ic->ic_parent_task); 1122 ieee80211_draintask(ic, &ic->ic_mcast_task); 1123 ieee80211_draintask(ic, &ic->ic_promisc_task); 1124 ieee80211_draintask(ic, &ic->ic_chan_task); 1125 ieee80211_draintask(ic, &ic->ic_bmiss_task); 1126 taskqueue_unblock(ic->ic_tq); 1127 } 1128 1129 /* 1130 * Start a vap running. If this is the first vap to be 1131 * set running on the underlying device then we 1132 * automatically bring the device up. 1133 */ 1134 void 1135 ieee80211_start_locked(struct ieee80211vap *vap) 1136 { 1137 struct ifnet *ifp = vap->iv_ifp; 1138 struct ieee80211com *ic = vap->iv_ic; 1139 struct ifnet *parent = ic->ic_ifp; 1140 1141 IEEE80211_LOCK_ASSERT(ic); 1142 1143 IEEE80211_DPRINTF(vap, 1144 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1145 "start running, %d vaps running\n", ic->ic_nrunning); 1146 1147 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) { 1148 /* 1149 * Mark us running. Note that it's ok to do this first; 1150 * if we need to bring the parent device up we defer that 1151 * to avoid dropping the com lock. We expect the device 1152 * to respond to being marked up by calling back into us 1153 * through ieee80211_start_all at which point we'll come 1154 * back in here and complete the work. 1155 */ 1156 ifp->if_drv_flags |= IFF_DRV_RUNNING; 1157 /* 1158 * We are not running; if this we are the first vap 1159 * to be brought up auto-up the parent if necessary. 1160 */ 1161 if (ic->ic_nrunning++ == 0 && 1162 (parent->if_drv_flags & IFF_DRV_RUNNING) == 0) { 1163 IEEE80211_DPRINTF(vap, 1164 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1165 "%s: up parent %s\n", __func__, parent->if_xname); 1166 parent->if_flags |= IFF_UP; 1167 ieee80211_runtask(ic, &ic->ic_parent_task); 1168 return; 1169 } 1170 } 1171 /* 1172 * If the parent is up and running, then kick the 1173 * 802.11 state machine as appropriate. 1174 */ 1175 if ((parent->if_drv_flags & IFF_DRV_RUNNING) && 1176 vap->iv_roaming != IEEE80211_ROAMING_MANUAL) { 1177 if (vap->iv_opmode == IEEE80211_M_STA) { 1178 #if 0 1179 /* XXX bypasses scan too easily; disable for now */ 1180 /* 1181 * Try to be intelligent about clocking the state 1182 * machine. If we're currently in RUN state then 1183 * we should be able to apply any new state/parameters 1184 * simply by re-associating. Otherwise we need to 1185 * re-scan to select an appropriate ap. 1186 */ 1187 if (vap->iv_state >= IEEE80211_S_RUN) 1188 ieee80211_new_state_locked(vap, 1189 IEEE80211_S_ASSOC, 1); 1190 else 1191 #endif 1192 ieee80211_new_state_locked(vap, 1193 IEEE80211_S_SCAN, 0); 1194 } else { 1195 /* 1196 * For monitor+wds mode there's nothing to do but 1197 * start running. Otherwise if this is the first 1198 * vap to be brought up, start a scan which may be 1199 * preempted if the station is locked to a particular 1200 * channel. 1201 */ 1202 vap->iv_flags_ext |= IEEE80211_FEXT_REINIT; 1203 if (vap->iv_opmode == IEEE80211_M_MONITOR || 1204 vap->iv_opmode == IEEE80211_M_WDS) 1205 ieee80211_new_state_locked(vap, 1206 IEEE80211_S_RUN, -1); 1207 else 1208 ieee80211_new_state_locked(vap, 1209 IEEE80211_S_SCAN, 0); 1210 } 1211 } 1212 } 1213 1214 /* 1215 * Start a single vap. 1216 */ 1217 void 1218 ieee80211_init(void *arg) 1219 { 1220 struct ieee80211vap *vap = arg; 1221 1222 /* 1223 * This routine is publicly accessible through the vap's 1224 * if_init method so guard against calls during detach. 1225 * ieee80211_vap_detach null's the backpointer before 1226 * tearing down state to signal any callback should be 1227 * rejected/ignored. 1228 */ 1229 if (vap != NULL) { 1230 IEEE80211_DPRINTF(vap, 1231 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1232 "%s\n", __func__); 1233 1234 IEEE80211_LOCK(vap->iv_ic); 1235 ieee80211_start_locked(vap); 1236 IEEE80211_UNLOCK(vap->iv_ic); 1237 } 1238 } 1239 1240 /* 1241 * Start all runnable vap's on a device. 1242 */ 1243 void 1244 ieee80211_start_all(struct ieee80211com *ic) 1245 { 1246 struct ieee80211vap *vap; 1247 1248 IEEE80211_LOCK(ic); 1249 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1250 struct ifnet *ifp = vap->iv_ifp; 1251 if (IFNET_IS_UP_RUNNING(ifp)) /* NB: avoid recursion */ 1252 ieee80211_start_locked(vap); 1253 } 1254 IEEE80211_UNLOCK(ic); 1255 } 1256 1257 /* 1258 * Stop a vap. We force it down using the state machine 1259 * then mark it's ifnet not running. If this is the last 1260 * vap running on the underlying device then we close it 1261 * too to insure it will be properly initialized when the 1262 * next vap is brought up. 1263 */ 1264 void 1265 ieee80211_stop_locked(struct ieee80211vap *vap) 1266 { 1267 struct ieee80211com *ic = vap->iv_ic; 1268 struct ifnet *ifp = vap->iv_ifp; 1269 struct ifnet *parent = ic->ic_ifp; 1270 1271 IEEE80211_LOCK_ASSERT(ic); 1272 1273 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1274 "stop running, %d vaps running\n", ic->ic_nrunning); 1275 1276 ieee80211_new_state_locked(vap, IEEE80211_S_INIT, -1); 1277 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 1278 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; /* mark us stopped */ 1279 if (--ic->ic_nrunning == 0 && 1280 (parent->if_drv_flags & IFF_DRV_RUNNING)) { 1281 IEEE80211_DPRINTF(vap, 1282 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1283 "down parent %s\n", parent->if_xname); 1284 parent->if_flags &= ~IFF_UP; 1285 ieee80211_runtask(ic, &ic->ic_parent_task); 1286 } 1287 } 1288 } 1289 1290 void 1291 ieee80211_stop(struct ieee80211vap *vap) 1292 { 1293 struct ieee80211com *ic = vap->iv_ic; 1294 1295 IEEE80211_LOCK(ic); 1296 ieee80211_stop_locked(vap); 1297 IEEE80211_UNLOCK(ic); 1298 } 1299 1300 /* 1301 * Stop all vap's running on a device. 1302 */ 1303 void 1304 ieee80211_stop_all(struct ieee80211com *ic) 1305 { 1306 struct ieee80211vap *vap; 1307 1308 IEEE80211_LOCK(ic); 1309 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1310 struct ifnet *ifp = vap->iv_ifp; 1311 if (IFNET_IS_UP_RUNNING(ifp)) /* NB: avoid recursion */ 1312 ieee80211_stop_locked(vap); 1313 } 1314 IEEE80211_UNLOCK(ic); 1315 1316 ieee80211_waitfor_parent(ic); 1317 } 1318 1319 /* 1320 * Stop all vap's running on a device and arrange 1321 * for those that were running to be resumed. 1322 */ 1323 void 1324 ieee80211_suspend_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 vap->iv_flags_ext |= IEEE80211_FEXT_RESUME; 1333 ieee80211_stop_locked(vap); 1334 } 1335 } 1336 IEEE80211_UNLOCK(ic); 1337 1338 ieee80211_waitfor_parent(ic); 1339 } 1340 1341 /* 1342 * Start all vap's marked for resume. 1343 */ 1344 void 1345 ieee80211_resume_all(struct ieee80211com *ic) 1346 { 1347 struct ieee80211vap *vap; 1348 1349 IEEE80211_LOCK(ic); 1350 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1351 struct ifnet *ifp = vap->iv_ifp; 1352 if (!IFNET_IS_UP_RUNNING(ifp) && 1353 (vap->iv_flags_ext & IEEE80211_FEXT_RESUME)) { 1354 vap->iv_flags_ext &= ~IEEE80211_FEXT_RESUME; 1355 ieee80211_start_locked(vap); 1356 } 1357 } 1358 IEEE80211_UNLOCK(ic); 1359 } 1360 1361 void 1362 ieee80211_beacon_miss(struct ieee80211com *ic) 1363 { 1364 IEEE80211_LOCK(ic); 1365 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 1366 /* Process in a taskq, the handler may reenter the driver */ 1367 ieee80211_runtask(ic, &ic->ic_bmiss_task); 1368 } 1369 IEEE80211_UNLOCK(ic); 1370 } 1371 1372 static void 1373 beacon_miss(void *arg, int npending) 1374 { 1375 struct ieee80211com *ic = arg; 1376 struct ieee80211vap *vap; 1377 1378 /* XXX locking */ 1379 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1380 /* 1381 * We only pass events through for sta vap's in RUN state; 1382 * may be too restrictive but for now this saves all the 1383 * handlers duplicating these checks. 1384 */ 1385 if (vap->iv_opmode == IEEE80211_M_STA && 1386 vap->iv_state == IEEE80211_S_RUN && 1387 vap->iv_bmiss != NULL) 1388 vap->iv_bmiss(vap); 1389 } 1390 } 1391 1392 static void 1393 beacon_swmiss(void *arg, int npending) 1394 { 1395 struct ieee80211vap *vap = arg; 1396 1397 if (vap->iv_state != IEEE80211_S_RUN) 1398 return; 1399 1400 /* XXX Call multiple times if npending > zero? */ 1401 vap->iv_bmiss(vap); 1402 } 1403 1404 /* 1405 * Software beacon miss handling. Check if any beacons 1406 * were received in the last period. If not post a 1407 * beacon miss; otherwise reset the counter. 1408 */ 1409 void 1410 ieee80211_swbmiss(void *arg) 1411 { 1412 struct ieee80211vap *vap = arg; 1413 struct ieee80211com *ic = vap->iv_ic; 1414 1415 /* XXX sleep state? */ 1416 KASSERT(vap->iv_state == IEEE80211_S_RUN, 1417 ("wrong state %d", vap->iv_state)); 1418 1419 if (ic->ic_flags & IEEE80211_F_SCAN) { 1420 /* 1421 * If scanning just ignore and reset state. If we get a 1422 * bmiss after coming out of scan because we haven't had 1423 * time to receive a beacon then we should probe the AP 1424 * before posting a real bmiss (unless iv_bmiss_max has 1425 * been artifiically lowered). A cleaner solution might 1426 * be to disable the timer on scan start/end but to handle 1427 * case of multiple sta vap's we'd need to disable the 1428 * timers of all affected vap's. 1429 */ 1430 vap->iv_swbmiss_count = 0; 1431 } else if (vap->iv_swbmiss_count == 0) { 1432 if (vap->iv_bmiss != NULL) 1433 ieee80211_runtask(ic, &vap->iv_swbmiss_task); 1434 if (vap->iv_bmiss_count == 0) /* don't re-arm timer */ 1435 return; 1436 } else 1437 vap->iv_swbmiss_count = 0; 1438 callout_reset(&vap->iv_swbmiss, vap->iv_swbmiss_period, 1439 ieee80211_swbmiss, vap); 1440 } 1441 1442 /* 1443 * Start an 802.11h channel switch. We record the parameters, 1444 * mark the operation pending, notify each vap through the 1445 * beacon update mechanism so it can update the beacon frame 1446 * contents, and then switch vap's to CSA state to block outbound 1447 * traffic. Devices that handle CSA directly can use the state 1448 * switch to do the right thing so long as they call 1449 * ieee80211_csa_completeswitch when it's time to complete the 1450 * channel change. Devices that depend on the net80211 layer can 1451 * use ieee80211_beacon_update to handle the countdown and the 1452 * channel switch. 1453 */ 1454 void 1455 ieee80211_csa_startswitch(struct ieee80211com *ic, 1456 struct ieee80211_channel *c, int mode, int count) 1457 { 1458 struct ieee80211vap *vap; 1459 1460 IEEE80211_LOCK_ASSERT(ic); 1461 1462 ic->ic_csa_newchan = c; 1463 ic->ic_csa_count = count; 1464 /* XXX record mode? */ 1465 ic->ic_flags |= IEEE80211_F_CSAPENDING; 1466 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1467 if (vap->iv_opmode == IEEE80211_M_HOSTAP || 1468 vap->iv_opmode == IEEE80211_M_IBSS) 1469 ieee80211_beacon_notify(vap, IEEE80211_BEACON_CSA); 1470 /* switch to CSA state to block outbound traffic */ 1471 if (vap->iv_state == IEEE80211_S_RUN) 1472 ieee80211_new_state_locked(vap, IEEE80211_S_CSA, 0); 1473 } 1474 ieee80211_notify_csa(ic, c, mode, count); 1475 } 1476 1477 /* 1478 * Complete an 802.11h channel switch started by ieee80211_csa_startswitch. 1479 * We clear state and move all vap's in CSA state to RUN state 1480 * so they can again transmit. 1481 */ 1482 void 1483 ieee80211_csa_completeswitch(struct ieee80211com *ic) 1484 { 1485 struct ieee80211vap *vap; 1486 1487 IEEE80211_LOCK_ASSERT(ic); 1488 1489 KASSERT(ic->ic_flags & IEEE80211_F_CSAPENDING, ("csa not pending")); 1490 1491 ieee80211_setcurchan(ic, ic->ic_csa_newchan); 1492 ic->ic_csa_newchan = NULL; 1493 ic->ic_flags &= ~IEEE80211_F_CSAPENDING; 1494 1495 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1496 if (vap->iv_state == IEEE80211_S_CSA) 1497 ieee80211_new_state_locked(vap, IEEE80211_S_RUN, 0); 1498 } 1499 1500 /* 1501 * Complete a DFS CAC started by ieee80211_dfs_cac_start. 1502 * We clear state and move all vap's in CAC state to RUN state. 1503 */ 1504 void 1505 ieee80211_cac_completeswitch(struct ieee80211vap *vap0) 1506 { 1507 struct ieee80211com *ic = vap0->iv_ic; 1508 struct ieee80211vap *vap; 1509 1510 IEEE80211_LOCK(ic); 1511 /* 1512 * Complete CAC state change for lead vap first; then 1513 * clock all the other vap's waiting. 1514 */ 1515 KASSERT(vap0->iv_state == IEEE80211_S_CAC, 1516 ("wrong state %d", vap0->iv_state)); 1517 ieee80211_new_state_locked(vap0, IEEE80211_S_RUN, 0); 1518 1519 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1520 if (vap->iv_state == IEEE80211_S_CAC) 1521 ieee80211_new_state_locked(vap, IEEE80211_S_RUN, 0); 1522 IEEE80211_UNLOCK(ic); 1523 } 1524 1525 /* 1526 * Force all vap's other than the specified vap to the INIT state 1527 * and mark them as waiting for a scan to complete. These vaps 1528 * will be brought up when the scan completes and the scanning vap 1529 * reaches RUN state by wakeupwaiting. 1530 */ 1531 static void 1532 markwaiting(struct ieee80211vap *vap0) 1533 { 1534 struct ieee80211com *ic = vap0->iv_ic; 1535 struct ieee80211vap *vap; 1536 1537 IEEE80211_LOCK_ASSERT(ic); 1538 1539 /* 1540 * A vap list entry can not disappear since we are running on the 1541 * taskqueue and a vap destroy will queue and drain another state 1542 * change task. 1543 */ 1544 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1545 if (vap == vap0) 1546 continue; 1547 if (vap->iv_state != IEEE80211_S_INIT) { 1548 /* NB: iv_newstate may drop the lock */ 1549 vap->iv_newstate(vap, IEEE80211_S_INIT, 0); 1550 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT; 1551 } 1552 } 1553 } 1554 1555 /* 1556 * Wakeup all vap's waiting for a scan to complete. This is the 1557 * companion to markwaiting (above) and is used to coordinate 1558 * multiple vaps scanning. 1559 * This is called from the state taskqueue. 1560 */ 1561 static void 1562 wakeupwaiting(struct ieee80211vap *vap0) 1563 { 1564 struct ieee80211com *ic = vap0->iv_ic; 1565 struct ieee80211vap *vap; 1566 1567 IEEE80211_LOCK_ASSERT(ic); 1568 1569 /* 1570 * A vap list entry can not disappear since we are running on the 1571 * taskqueue and a vap destroy will queue and drain another state 1572 * change task. 1573 */ 1574 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1575 if (vap == vap0) 1576 continue; 1577 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANWAIT) { 1578 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANWAIT; 1579 /* NB: sta's cannot go INIT->RUN */ 1580 /* NB: iv_newstate may drop the lock */ 1581 vap->iv_newstate(vap, 1582 vap->iv_opmode == IEEE80211_M_STA ? 1583 IEEE80211_S_SCAN : IEEE80211_S_RUN, 0); 1584 } 1585 } 1586 } 1587 1588 /* 1589 * Handle post state change work common to all operating modes. 1590 */ 1591 static void 1592 ieee80211_newstate_cb(void *xvap, int npending) 1593 { 1594 struct ieee80211vap *vap = xvap; 1595 struct ieee80211com *ic = vap->iv_ic; 1596 enum ieee80211_state nstate, ostate; 1597 int arg, rc; 1598 1599 IEEE80211_LOCK(ic); 1600 nstate = vap->iv_nstate; 1601 arg = vap->iv_nstate_arg; 1602 1603 if (vap->iv_flags_ext & IEEE80211_FEXT_REINIT) { 1604 /* 1605 * We have been requested to drop back to the INIT before 1606 * proceeding to the new state. 1607 */ 1608 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1609 "%s: %s -> %s arg %d\n", __func__, 1610 ieee80211_state_name[vap->iv_state], 1611 ieee80211_state_name[IEEE80211_S_INIT], arg); 1612 vap->iv_newstate(vap, IEEE80211_S_INIT, arg); 1613 vap->iv_flags_ext &= ~IEEE80211_FEXT_REINIT; 1614 } 1615 1616 ostate = vap->iv_state; 1617 if (nstate == IEEE80211_S_SCAN && ostate != IEEE80211_S_INIT) { 1618 /* 1619 * SCAN was forced; e.g. on beacon miss. Force other running 1620 * vap's to INIT state and mark them as waiting for the scan to 1621 * complete. This insures they don't interfere with our 1622 * scanning. Since we are single threaded the vaps can not 1623 * transition again while we are executing. 1624 * 1625 * XXX not always right, assumes ap follows sta 1626 */ 1627 markwaiting(vap); 1628 } 1629 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1630 "%s: %s -> %s arg %d\n", __func__, 1631 ieee80211_state_name[ostate], ieee80211_state_name[nstate], arg); 1632 1633 rc = vap->iv_newstate(vap, nstate, arg); 1634 vap->iv_flags_ext &= ~IEEE80211_FEXT_STATEWAIT; 1635 if (rc != 0) { 1636 /* State transition failed */ 1637 KASSERT(rc != EINPROGRESS, ("iv_newstate was deferred")); 1638 KASSERT(nstate != IEEE80211_S_INIT, 1639 ("INIT state change failed")); 1640 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1641 "%s: %s returned error %d\n", __func__, 1642 ieee80211_state_name[nstate], rc); 1643 goto done; 1644 } 1645 1646 /* No actual transition, skip post processing */ 1647 if (ostate == nstate) 1648 goto done; 1649 1650 if (nstate == IEEE80211_S_RUN) { 1651 /* 1652 * OACTIVE may be set on the vap if the upper layer 1653 * tried to transmit (e.g. IPv6 NDP) before we reach 1654 * RUN state. Clear it and restart xmit. 1655 * 1656 * Note this can also happen as a result of SLEEP->RUN 1657 * (i.e. coming out of power save mode). 1658 */ 1659 vap->iv_ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 1660 if_start(vap->iv_ifp); 1661 1662 /* bring up any vaps waiting on us */ 1663 wakeupwaiting(vap); 1664 } else if (nstate == IEEE80211_S_INIT) { 1665 /* 1666 * Flush the scan cache if we did the last scan (XXX?) 1667 * and flush any frames on send queues from this vap. 1668 * Note the mgt q is used only for legacy drivers and 1669 * will go away shortly. 1670 */ 1671 ieee80211_scan_flush(vap); 1672 1673 /* XXX NB: cast for altq */ 1674 ieee80211_flush_ifq((struct ifqueue *)&ic->ic_ifp->if_snd, vap); 1675 } 1676 done: 1677 IEEE80211_UNLOCK(ic); 1678 } 1679 1680 /* 1681 * Public interface for initiating a state machine change. 1682 * This routine single-threads the request and coordinates 1683 * the scheduling of multiple vaps for the purpose of selecting 1684 * an operating channel. Specifically the following scenarios 1685 * are handled: 1686 * o only one vap can be selecting a channel so on transition to 1687 * SCAN state if another vap is already scanning then 1688 * mark the caller for later processing and return without 1689 * doing anything (XXX? expectations by caller of synchronous operation) 1690 * o only one vap can be doing CAC of a channel so on transition to 1691 * CAC state if another vap is already scanning for radar then 1692 * mark the caller for later processing and return without 1693 * doing anything (XXX? expectations by caller of synchronous operation) 1694 * o if another vap is already running when a request is made 1695 * to SCAN then an operating channel has been chosen; bypass 1696 * the scan and just join the channel 1697 * 1698 * Note that the state change call is done through the iv_newstate 1699 * method pointer so any driver routine gets invoked. The driver 1700 * will normally call back into operating mode-specific 1701 * ieee80211_newstate routines (below) unless it needs to completely 1702 * bypass the state machine (e.g. because the firmware has it's 1703 * own idea how things should work). Bypassing the net80211 layer 1704 * is usually a mistake and indicates lack of proper integration 1705 * with the net80211 layer. 1706 */ 1707 static int 1708 ieee80211_new_state_locked(struct ieee80211vap *vap, 1709 enum ieee80211_state nstate, int arg) 1710 { 1711 struct ieee80211com *ic = vap->iv_ic; 1712 struct ieee80211vap *vp; 1713 enum ieee80211_state ostate; 1714 int nrunning, nscanning; 1715 1716 IEEE80211_LOCK_ASSERT(ic); 1717 1718 if (vap->iv_flags_ext & IEEE80211_FEXT_STATEWAIT) { 1719 if (vap->iv_nstate == IEEE80211_S_INIT) { 1720 /* 1721 * XXX The vap is being stopped, do no allow any other 1722 * state changes until this is completed. 1723 */ 1724 return -1; 1725 } else if (vap->iv_state != vap->iv_nstate) { 1726 #if 0 1727 /* Warn if the previous state hasn't completed. */ 1728 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1729 "%s: pending %s -> %s transition lost\n", __func__, 1730 ieee80211_state_name[vap->iv_state], 1731 ieee80211_state_name[vap->iv_nstate]); 1732 #else 1733 /* XXX temporarily enable to identify issues */ 1734 if_printf(vap->iv_ifp, 1735 "%s: pending %s -> %s transition lost\n", 1736 __func__, ieee80211_state_name[vap->iv_state], 1737 ieee80211_state_name[vap->iv_nstate]); 1738 #endif 1739 } 1740 } 1741 1742 nrunning = nscanning = 0; 1743 /* XXX can track this state instead of calculating */ 1744 TAILQ_FOREACH(vp, &ic->ic_vaps, iv_next) { 1745 if (vp != vap) { 1746 if (vp->iv_state >= IEEE80211_S_RUN) 1747 nrunning++; 1748 /* XXX doesn't handle bg scan */ 1749 /* NB: CAC+AUTH+ASSOC treated like SCAN */ 1750 else if (vp->iv_state > IEEE80211_S_INIT) 1751 nscanning++; 1752 } 1753 } 1754 ostate = vap->iv_state; 1755 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1756 "%s: %s -> %s (nrunning %d nscanning %d)\n", __func__, 1757 ieee80211_state_name[ostate], ieee80211_state_name[nstate], 1758 nrunning, nscanning); 1759 switch (nstate) { 1760 case IEEE80211_S_SCAN: 1761 if (ostate == IEEE80211_S_INIT) { 1762 /* 1763 * INIT -> SCAN happens on initial bringup. 1764 */ 1765 KASSERT(!(nscanning && nrunning), 1766 ("%d scanning and %d running", nscanning, nrunning)); 1767 if (nscanning) { 1768 /* 1769 * Someone is scanning, defer our state 1770 * change until the work has completed. 1771 */ 1772 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1773 "%s: defer %s -> %s\n", 1774 __func__, ieee80211_state_name[ostate], 1775 ieee80211_state_name[nstate]); 1776 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT; 1777 return 0; 1778 } 1779 if (nrunning) { 1780 /* 1781 * Someone is operating; just join the channel 1782 * they have chosen. 1783 */ 1784 /* XXX kill arg? */ 1785 /* XXX check each opmode, adhoc? */ 1786 if (vap->iv_opmode == IEEE80211_M_STA) 1787 nstate = IEEE80211_S_SCAN; 1788 else 1789 nstate = IEEE80211_S_RUN; 1790 #ifdef IEEE80211_DEBUG 1791 if (nstate != IEEE80211_S_SCAN) { 1792 IEEE80211_DPRINTF(vap, 1793 IEEE80211_MSG_STATE, 1794 "%s: override, now %s -> %s\n", 1795 __func__, 1796 ieee80211_state_name[ostate], 1797 ieee80211_state_name[nstate]); 1798 } 1799 #endif 1800 } 1801 } 1802 break; 1803 case IEEE80211_S_RUN: 1804 if (vap->iv_opmode == IEEE80211_M_WDS && 1805 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) && 1806 nscanning) { 1807 /* 1808 * Legacy WDS with someone else scanning; don't 1809 * go online until that completes as we should 1810 * follow the other vap to the channel they choose. 1811 */ 1812 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1813 "%s: defer %s -> %s (legacy WDS)\n", __func__, 1814 ieee80211_state_name[ostate], 1815 ieee80211_state_name[nstate]); 1816 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT; 1817 return 0; 1818 } 1819 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 1820 IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) && 1821 (vap->iv_flags_ext & IEEE80211_FEXT_DFS) && 1822 !IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) { 1823 /* 1824 * This is a DFS channel, transition to CAC state 1825 * instead of RUN. This allows us to initiate 1826 * Channel Availability Check (CAC) as specified 1827 * by 11h/DFS. 1828 */ 1829 nstate = IEEE80211_S_CAC; 1830 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1831 "%s: override %s -> %s (DFS)\n", __func__, 1832 ieee80211_state_name[ostate], 1833 ieee80211_state_name[nstate]); 1834 } 1835 break; 1836 case IEEE80211_S_INIT: 1837 if (ostate == IEEE80211_S_INIT ) { 1838 /* XXX don't believe this */ 1839 /* INIT -> INIT. nothing to do */ 1840 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANWAIT; 1841 } 1842 /* fall thru... */ 1843 default: 1844 break; 1845 } 1846 /* defer the state change to a thread */ 1847 vap->iv_nstate = nstate; 1848 vap->iv_nstate_arg = arg; 1849 vap->iv_flags_ext |= IEEE80211_FEXT_STATEWAIT; 1850 ieee80211_runtask(ic, &vap->iv_nstate_task); 1851 return EINPROGRESS; 1852 } 1853 1854 int 1855 ieee80211_new_state(struct ieee80211vap *vap, 1856 enum ieee80211_state nstate, int arg) 1857 { 1858 struct ieee80211com *ic = vap->iv_ic; 1859 int rc; 1860 1861 IEEE80211_LOCK(ic); 1862 rc = ieee80211_new_state_locked(vap, nstate, arg); 1863 IEEE80211_UNLOCK(ic); 1864 return rc; 1865 } 1866