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 * $FreeBSD: head/sys/net80211/ieee80211_proto.c 195618 2009-07-11 15:02:45Z rpaulo $ 27 */ 28 29 /* 30 * IEEE 802.11 protocol support. 31 */ 32 33 #include "opt_inet.h" 34 #include "opt_wlan.h" 35 36 #include <sys/param.h> 37 #include <sys/kernel.h> 38 #include <sys/systm.h> 39 40 #include <sys/socket.h> 41 #include <sys/sockio.h> 42 43 #include <net/if.h> 44 #include <net/if_media.h> 45 #include <net/route.h> 46 47 #include <netproto/802_11/ieee80211_var.h> 48 #include <netproto/802_11/ieee80211_adhoc.h> 49 #include <netproto/802_11/ieee80211_sta.h> 50 #include <netproto/802_11/ieee80211_hostap.h> 51 #include <netproto/802_11/ieee80211_wds.h> 52 #ifdef IEEE80211_SUPPORT_MESH 53 #include <netproto/802_11/ieee80211_mesh.h> 54 #endif 55 #include <netproto/802_11/ieee80211_monitor.h> 56 #include <netproto/802_11/ieee80211_input.h> 57 58 /* XXX tunables */ 59 #define AGGRESSIVE_MODE_SWITCH_HYSTERESIS 3 /* pkts / 100ms */ 60 #define HIGH_PRI_SWITCH_THRESH 10 /* pkts / 100ms */ 61 62 const char *ieee80211_mgt_subtype_name[] = { 63 "assoc_req", "assoc_resp", "reassoc_req", "reassoc_resp", 64 "probe_req", "probe_resp", "reserved#6", "reserved#7", 65 "beacon", "atim", "disassoc", "auth", 66 "deauth", "action", "reserved#14", "reserved#15" 67 }; 68 const char *ieee80211_ctl_subtype_name[] = { 69 "reserved#0", "reserved#1", "reserved#2", "reserved#3", 70 "reserved#3", "reserved#5", "reserved#6", "reserved#7", 71 "reserved#8", "reserved#9", "ps_poll", "rts", 72 "cts", "ack", "cf_end", "cf_end_ack" 73 }; 74 const char *ieee80211_opmode_name[IEEE80211_OPMODE_MAX] = { 75 "IBSS", /* IEEE80211_M_IBSS */ 76 "STA", /* IEEE80211_M_STA */ 77 "WDS", /* IEEE80211_M_WDS */ 78 "AHDEMO", /* IEEE80211_M_AHDEMO */ 79 "HOSTAP", /* IEEE80211_M_HOSTAP */ 80 "MONITOR", /* IEEE80211_M_MONITOR */ 81 "MBSS" /* IEEE80211_M_MBSS */ 82 }; 83 const char *ieee80211_state_name[IEEE80211_S_MAX] = { 84 "INIT", /* IEEE80211_S_INIT */ 85 "SCAN", /* IEEE80211_S_SCAN */ 86 "AUTH", /* IEEE80211_S_AUTH */ 87 "ASSOC", /* IEEE80211_S_ASSOC */ 88 "CAC", /* IEEE80211_S_CAC */ 89 "RUN", /* IEEE80211_S_RUN */ 90 "CSA", /* IEEE80211_S_CSA */ 91 "SLEEP", /* IEEE80211_S_SLEEP */ 92 }; 93 const char *ieee80211_wme_acnames[] = { 94 "WME_AC_BE", 95 "WME_AC_BK", 96 "WME_AC_VI", 97 "WME_AC_VO", 98 "WME_UPSD", 99 }; 100 101 static void beacon_miss_task(void *, int); 102 static void beacon_swmiss_task(void *, int); 103 static void parent_updown_task(void *, int); 104 static void update_mcast_task(void *, int); 105 static void update_promisc_task(void *, int); 106 static void update_channel_task(void *, int); 107 static void ieee80211_newstate_task(void *, int); 108 static int ieee80211_new_state_locked(struct ieee80211vap *, 109 enum ieee80211_state, int); 110 111 static int 112 null_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 } 121 122 void 123 ieee80211_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_task, ifp); 142 TASK_INIT(&ic->ic_mcast_task, 0, update_mcast_task, ic); 143 TASK_INIT(&ic->ic_promisc_task, 0, update_promisc_task, ic); 144 TASK_INIT(&ic->ic_chan_task, 0, update_channel_task, ic); 145 TASK_INIT(&ic->ic_bmiss_task, 0, beacon_miss_task, ic); 146 147 ic->ic_wme.wme_hipri_switch_hysteresis = 148 AGGRESSIVE_MODE_SWITCH_HYSTERESIS; 149 150 /* initialize management frame handlers */ 151 ic->ic_send_mgmt = ieee80211_send_mgmt; 152 ic->ic_raw_xmit = null_raw_xmit; 153 154 ieee80211_adhoc_attach(ic); 155 ieee80211_sta_attach(ic); 156 ieee80211_wds_attach(ic); 157 ieee80211_hostap_attach(ic); 158 #ifdef IEEE80211_SUPPORT_MESH 159 ieee80211_mesh_attach(ic); 160 #endif 161 ieee80211_monitor_attach(ic); 162 } 163 164 void 165 ieee80211_proto_detach(struct ieee80211com *ic) 166 { 167 ieee80211_monitor_detach(ic); 168 #ifdef IEEE80211_SUPPORT_MESH 169 ieee80211_mesh_detach(ic); 170 #endif 171 ieee80211_hostap_detach(ic); 172 ieee80211_wds_detach(ic); 173 ieee80211_adhoc_detach(ic); 174 ieee80211_sta_detach(ic); 175 } 176 177 static void 178 null_update_beacon(struct ieee80211vap *vap, int item) 179 { 180 } 181 182 void 183 ieee80211_proto_vattach(struct ieee80211vap *vap) 184 { 185 struct ieee80211com *ic = vap->iv_ic; 186 struct ifnet *ifp = vap->iv_ifp; 187 int i; 188 189 /* override the 802.3 setting */ 190 ifp->if_hdrlen = ic->ic_ifp->if_hdrlen; 191 192 vap->iv_rtsthreshold = IEEE80211_RTS_DEFAULT; 193 vap->iv_fragthreshold = IEEE80211_FRAG_DEFAULT; 194 vap->iv_bmiss_max = IEEE80211_BMISS_MAX; 195 callout_init_mp(&vap->iv_swbmiss); 196 callout_init_mp(&vap->iv_mgtsend); 197 TASK_INIT(&vap->iv_nstate_task, 0, ieee80211_newstate_task, vap); 198 TASK_INIT(&vap->iv_swbmiss_task, 0, beacon_swmiss_task, vap); 199 /* 200 * Install default tx rate handling: no fixed rate, lowest 201 * supported rate for mgmt and multicast frames. Default 202 * max retry count. These settings can be changed by the 203 * driver and/or user applications. 204 */ 205 for (i = IEEE80211_MODE_11A; i < IEEE80211_MODE_MAX; i++) { 206 const struct ieee80211_rateset *rs = &ic->ic_sup_rates[i]; 207 208 vap->iv_txparms[i].ucastrate = IEEE80211_FIXED_RATE_NONE; 209 if (i == IEEE80211_MODE_11NA || i == IEEE80211_MODE_11NG) { 210 vap->iv_txparms[i].mgmtrate = 0 | IEEE80211_RATE_MCS; 211 vap->iv_txparms[i].mcastrate = 0 | IEEE80211_RATE_MCS; 212 } else { 213 vap->iv_txparms[i].mgmtrate = 214 rs->rs_rates[0] & IEEE80211_RATE_VAL; 215 vap->iv_txparms[i].mcastrate = 216 rs->rs_rates[0] & IEEE80211_RATE_VAL; 217 } 218 vap->iv_txparms[i].maxretry = IEEE80211_TXMAX_DEFAULT; 219 } 220 vap->iv_roaming = IEEE80211_ROAMING_AUTO; 221 222 vap->iv_update_beacon = null_update_beacon; 223 vap->iv_deliver_data = ieee80211_deliver_data; 224 225 /* attach support for operating mode */ 226 ic->ic_vattach[vap->iv_opmode](vap); 227 } 228 229 void 230 ieee80211_proto_vdetach(struct ieee80211vap *vap) 231 { 232 #define FREEAPPIE(ie) do { \ 233 if (ie != NULL) \ 234 kfree(ie, M_80211_NODE_IE); \ 235 } while (0) 236 /* 237 * Detach operating mode module. 238 */ 239 if (vap->iv_opdetach != NULL) 240 vap->iv_opdetach(vap); 241 /* 242 * This should not be needed as we detach when reseting 243 * the state but be conservative here since the 244 * authenticator may do things like spawn kernel threads. 245 */ 246 if (vap->iv_auth->ia_detach != NULL) 247 vap->iv_auth->ia_detach(vap); 248 /* 249 * Detach any ACL'ator. 250 */ 251 if (vap->iv_acl != NULL) 252 vap->iv_acl->iac_detach(vap); 253 254 FREEAPPIE(vap->iv_appie_beacon); 255 FREEAPPIE(vap->iv_appie_probereq); 256 FREEAPPIE(vap->iv_appie_proberesp); 257 FREEAPPIE(vap->iv_appie_assocreq); 258 FREEAPPIE(vap->iv_appie_assocresp); 259 FREEAPPIE(vap->iv_appie_wpa); 260 #undef FREEAPPIE 261 } 262 263 /* 264 * Simple-minded authenticator module support. 265 */ 266 267 #define IEEE80211_AUTH_MAX (IEEE80211_AUTH_WPA+1) 268 /* XXX well-known names */ 269 static const char *auth_modnames[IEEE80211_AUTH_MAX] = { 270 "wlan_internal", /* IEEE80211_AUTH_NONE */ 271 "wlan_internal", /* IEEE80211_AUTH_OPEN */ 272 "wlan_internal", /* IEEE80211_AUTH_SHARED */ 273 "wlan_xauth", /* IEEE80211_AUTH_8021X */ 274 "wlan_internal", /* IEEE80211_AUTH_AUTO */ 275 "wlan_xauth", /* IEEE80211_AUTH_WPA */ 276 }; 277 static const struct ieee80211_authenticator *authenticators[IEEE80211_AUTH_MAX]; 278 279 static const struct ieee80211_authenticator auth_internal = { 280 .ia_name = "wlan_internal", 281 .ia_attach = NULL, 282 .ia_detach = NULL, 283 .ia_node_join = NULL, 284 .ia_node_leave = NULL, 285 }; 286 287 /* 288 * Setup internal authenticators once; they are never unregistered. 289 */ 290 static void 291 ieee80211_auth_setup(void) 292 { 293 ieee80211_authenticator_register(IEEE80211_AUTH_OPEN, &auth_internal); 294 ieee80211_authenticator_register(IEEE80211_AUTH_SHARED, &auth_internal); 295 ieee80211_authenticator_register(IEEE80211_AUTH_AUTO, &auth_internal); 296 } 297 SYSINIT(wlan_auth, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_auth_setup, NULL); 298 299 const struct ieee80211_authenticator * 300 ieee80211_authenticator_get(int auth) 301 { 302 if (auth >= IEEE80211_AUTH_MAX) 303 return NULL; 304 if (authenticators[auth] == NULL) 305 ieee80211_load_module(auth_modnames[auth]); 306 return authenticators[auth]; 307 } 308 309 void 310 ieee80211_authenticator_register(int type, 311 const struct ieee80211_authenticator *auth) 312 { 313 if (type >= IEEE80211_AUTH_MAX) 314 return; 315 authenticators[type] = auth; 316 } 317 318 void 319 ieee80211_authenticator_unregister(int type) 320 { 321 322 if (type >= IEEE80211_AUTH_MAX) 323 return; 324 authenticators[type] = NULL; 325 } 326 327 /* 328 * Very simple-minded ACL module support. 329 */ 330 /* XXX just one for now */ 331 static const struct ieee80211_aclator *acl = NULL; 332 333 void 334 ieee80211_aclator_register(const struct ieee80211_aclator *iac) 335 { 336 kprintf("wlan: %s acl policy registered\n", iac->iac_name); 337 acl = iac; 338 } 339 340 void 341 ieee80211_aclator_unregister(const struct ieee80211_aclator *iac) 342 { 343 if (acl == iac) 344 acl = NULL; 345 kprintf("wlan: %s acl policy unregistered\n", iac->iac_name); 346 } 347 348 const struct ieee80211_aclator * 349 ieee80211_aclator_get(const char *name) 350 { 351 if (acl == NULL) 352 ieee80211_load_module("wlan_acl"); 353 return acl != NULL && strcmp(acl->iac_name, name) == 0 ? acl : NULL; 354 } 355 356 void 357 ieee80211_print_essid(const uint8_t *essid, int len) 358 { 359 const uint8_t *p; 360 int i; 361 362 if (len > IEEE80211_NWID_LEN) 363 len = IEEE80211_NWID_LEN; 364 /* determine printable or not */ 365 for (i = 0, p = essid; i < len; i++, p++) { 366 if (*p < ' ' || *p > 0x7e) 367 break; 368 } 369 if (i == len) { 370 kprintf("\""); 371 for (i = 0, p = essid; i < len; i++, p++) 372 kprintf("%c", *p); 373 kprintf("\""); 374 } else { 375 kprintf("0x"); 376 for (i = 0, p = essid; i < len; i++, p++) 377 kprintf("%02x", *p); 378 } 379 } 380 381 void 382 ieee80211_dump_pkt(struct ieee80211com *ic, 383 const uint8_t *buf, int len, int rate, int rssi) 384 { 385 const struct ieee80211_frame *wh; 386 int i; 387 388 wh = (const struct ieee80211_frame *)buf; 389 switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) { 390 case IEEE80211_FC1_DIR_NODS: 391 kprintf("NODS %6D", wh->i_addr2, ":"); 392 kprintf("->%6D", wh->i_addr1, ":"); 393 kprintf("(%6D)", wh->i_addr3, ":"); 394 break; 395 case IEEE80211_FC1_DIR_TODS: 396 kprintf("TODS %6D", wh->i_addr2, ":"); 397 kprintf("->%6D", wh->i_addr3, ":"); 398 kprintf("(%6D)", wh->i_addr1, ":"); 399 break; 400 case IEEE80211_FC1_DIR_FROMDS: 401 kprintf("FRDS %6D", wh->i_addr3, ":"); 402 kprintf("->%6D", wh->i_addr1, ":"); 403 kprintf("(%6D)", wh->i_addr2, ":"); 404 break; 405 case IEEE80211_FC1_DIR_DSTODS: 406 kprintf("DSDS %6D", (const uint8_t *)&wh[1], ":"); 407 kprintf("->%6D", wh->i_addr3, ":"); 408 kprintf("(%6D", wh->i_addr2, ":"); 409 kprintf("->%6D)", wh->i_addr1, ":"); 410 break; 411 } 412 switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) { 413 case IEEE80211_FC0_TYPE_DATA: 414 kprintf(" data"); 415 break; 416 case IEEE80211_FC0_TYPE_MGT: 417 kprintf(" %s", ieee80211_mgt_subtype_name[ 418 (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) 419 >> IEEE80211_FC0_SUBTYPE_SHIFT]); 420 break; 421 default: 422 kprintf(" type#%d", wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK); 423 break; 424 } 425 if (IEEE80211_QOS_HAS_SEQ(wh)) { 426 const struct ieee80211_qosframe *qwh = 427 (const struct ieee80211_qosframe *)buf; 428 kprintf(" QoS [TID %u%s]", qwh->i_qos[0] & IEEE80211_QOS_TID, 429 qwh->i_qos[0] & IEEE80211_QOS_ACKPOLICY ? " ACM" : ""); 430 } 431 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 432 int off; 433 434 off = ieee80211_anyhdrspace(ic, wh); 435 kprintf(" WEP [IV %.02x %.02x %.02x", 436 buf[off+0], buf[off+1], buf[off+2]); 437 if (buf[off+IEEE80211_WEP_IVLEN] & IEEE80211_WEP_EXTIV) 438 kprintf(" %.02x %.02x %.02x", 439 buf[off+4], buf[off+5], buf[off+6]); 440 kprintf(" KID %u]", buf[off+IEEE80211_WEP_IVLEN] >> 6); 441 } 442 if (rate >= 0) 443 kprintf(" %dM", rate / 2); 444 if (rssi >= 0) 445 kprintf(" +%d", rssi); 446 kprintf("\n"); 447 if (len > 0) { 448 for (i = 0; i < len; i++) { 449 if ((i & 1) == 0) 450 kprintf(" "); 451 kprintf("%02x", buf[i]); 452 } 453 kprintf("\n"); 454 } 455 } 456 457 static __inline int 458 findrix(const struct ieee80211_rateset *rs, int r) 459 { 460 int i; 461 462 for (i = 0; i < rs->rs_nrates; i++) 463 if ((rs->rs_rates[i] & IEEE80211_RATE_VAL) == r) 464 return i; 465 return -1; 466 } 467 468 int 469 ieee80211_fix_rate(struct ieee80211_node *ni, 470 struct ieee80211_rateset *nrs, int flags) 471 { 472 #define RV(v) ((v) & IEEE80211_RATE_VAL) 473 struct ieee80211vap *vap = ni->ni_vap; 474 struct ieee80211com *ic = ni->ni_ic; 475 int i, j, rix, error; 476 int okrate, badrate, fixedrate, ucastrate; 477 const struct ieee80211_rateset *srs; 478 uint8_t r; 479 480 error = 0; 481 okrate = badrate = 0; 482 ucastrate = vap->iv_txparms[ieee80211_chan2mode(ni->ni_chan)].ucastrate; 483 if (ucastrate != IEEE80211_FIXED_RATE_NONE) { 484 /* 485 * Workaround awkwardness with fixed rate. We are called 486 * to check both the legacy rate set and the HT rate set 487 * but we must apply any legacy fixed rate check only to the 488 * legacy rate set and vice versa. We cannot tell what type 489 * of rate set we've been given (legacy or HT) but we can 490 * distinguish the fixed rate type (MCS have 0x80 set). 491 * So to deal with this the caller communicates whether to 492 * check MCS or legacy rate using the flags and we use the 493 * type of any fixed rate to avoid applying an MCS to a 494 * legacy rate and vice versa. 495 */ 496 if (ucastrate & 0x80) { 497 if (flags & IEEE80211_F_DOFRATE) 498 flags &= ~IEEE80211_F_DOFRATE; 499 } else if ((ucastrate & 0x80) == 0) { 500 if (flags & IEEE80211_F_DOFMCS) 501 flags &= ~IEEE80211_F_DOFMCS; 502 } 503 /* NB: required to make MCS match below work */ 504 ucastrate &= IEEE80211_RATE_VAL; 505 } 506 fixedrate = IEEE80211_FIXED_RATE_NONE; 507 /* 508 * XXX we are called to process both MCS and legacy rates; 509 * we must use the appropriate basic rate set or chaos will 510 * ensue; for now callers that want MCS must supply 511 * IEEE80211_F_DOBRS; at some point we'll need to split this 512 * function so there are two variants, one for MCS and one 513 * for legacy rates. 514 */ 515 if (flags & IEEE80211_F_DOBRS) 516 srs = (const struct ieee80211_rateset *) 517 ieee80211_get_suphtrates(ic, ni->ni_chan); 518 else 519 srs = ieee80211_get_suprates(ic, ni->ni_chan); 520 for (i = 0; i < nrs->rs_nrates; ) { 521 if (flags & IEEE80211_F_DOSORT) { 522 /* 523 * Sort rates. 524 */ 525 for (j = i + 1; j < nrs->rs_nrates; j++) { 526 if (RV(nrs->rs_rates[i]) > RV(nrs->rs_rates[j])) { 527 r = nrs->rs_rates[i]; 528 nrs->rs_rates[i] = nrs->rs_rates[j]; 529 nrs->rs_rates[j] = r; 530 } 531 } 532 } 533 r = nrs->rs_rates[i] & IEEE80211_RATE_VAL; 534 badrate = r; 535 /* 536 * Check for fixed rate. 537 */ 538 if (r == ucastrate) 539 fixedrate = r; 540 /* 541 * Check against supported rates. 542 */ 543 rix = findrix(srs, r); 544 if (flags & IEEE80211_F_DONEGO) { 545 if (rix < 0) { 546 /* 547 * A rate in the node's rate set is not 548 * supported. If this is a basic rate and we 549 * are operating as a STA then this is an error. 550 * Otherwise we just discard/ignore the rate. 551 */ 552 if ((flags & IEEE80211_F_JOIN) && 553 (nrs->rs_rates[i] & IEEE80211_RATE_BASIC)) 554 error++; 555 } else if ((flags & IEEE80211_F_JOIN) == 0) { 556 /* 557 * Overwrite with the supported rate 558 * value so any basic rate bit is set. 559 */ 560 nrs->rs_rates[i] = srs->rs_rates[rix]; 561 } 562 } 563 if ((flags & IEEE80211_F_DODEL) && rix < 0) { 564 /* 565 * Delete unacceptable rates. 566 */ 567 nrs->rs_nrates--; 568 for (j = i; j < nrs->rs_nrates; j++) 569 nrs->rs_rates[j] = nrs->rs_rates[j + 1]; 570 nrs->rs_rates[j] = 0; 571 continue; 572 } 573 if (rix >= 0) 574 okrate = nrs->rs_rates[i]; 575 i++; 576 } 577 if (okrate == 0 || error != 0 || 578 ((flags & (IEEE80211_F_DOFRATE|IEEE80211_F_DOFMCS)) && 579 fixedrate != ucastrate)) { 580 IEEE80211_NOTE(vap, IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni, 581 "%s: flags 0x%x okrate %d error %d fixedrate 0x%x " 582 "ucastrate %x\n", __func__, flags, okrate, error, 583 fixedrate, ucastrate); 584 return badrate | IEEE80211_RATE_BASIC; 585 } else 586 return RV(okrate); 587 #undef RV 588 } 589 590 /* 591 * Reset 11g-related state. 592 */ 593 void 594 ieee80211_reset_erp(struct ieee80211com *ic) 595 { 596 ic->ic_flags &= ~IEEE80211_F_USEPROT; 597 ic->ic_nonerpsta = 0; 598 ic->ic_longslotsta = 0; 599 /* 600 * Short slot time is enabled only when operating in 11g 601 * and not in an IBSS. We must also honor whether or not 602 * the driver is capable of doing it. 603 */ 604 ieee80211_set_shortslottime(ic, 605 IEEE80211_IS_CHAN_A(ic->ic_curchan) || 606 IEEE80211_IS_CHAN_HT(ic->ic_curchan) || 607 (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 608 ic->ic_opmode == IEEE80211_M_HOSTAP && 609 (ic->ic_caps & IEEE80211_C_SHSLOT))); 610 /* 611 * Set short preamble and ERP barker-preamble flags. 612 */ 613 if (IEEE80211_IS_CHAN_A(ic->ic_curchan) || 614 (ic->ic_caps & IEEE80211_C_SHPREAMBLE)) { 615 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 616 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 617 } else { 618 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 619 ic->ic_flags |= IEEE80211_F_USEBARKER; 620 } 621 } 622 623 /* 624 * Set the short slot time state and notify the driver. 625 */ 626 void 627 ieee80211_set_shortslottime(struct ieee80211com *ic, int onoff) 628 { 629 if (onoff) 630 ic->ic_flags |= IEEE80211_F_SHSLOT; 631 else 632 ic->ic_flags &= ~IEEE80211_F_SHSLOT; 633 /* notify driver */ 634 if (ic->ic_updateslot != NULL) 635 ic->ic_updateslot(ic->ic_ifp); 636 } 637 638 /* 639 * Check if the specified rate set supports ERP. 640 * NB: the rate set is assumed to be sorted. 641 */ 642 int 643 ieee80211_iserp_rateset(const struct ieee80211_rateset *rs) 644 { 645 static const int rates[] = { 2, 4, 11, 22, 12, 24, 48 }; 646 int i, j; 647 648 if (rs->rs_nrates < NELEM(rates)) 649 return 0; 650 for (i = 0; i < NELEM(rates); i++) { 651 for (j = 0; j < rs->rs_nrates; j++) { 652 int r = rs->rs_rates[j] & IEEE80211_RATE_VAL; 653 if (rates[i] == r) 654 goto next; 655 if (r > rates[i]) 656 return 0; 657 } 658 return 0; 659 next: 660 ; 661 } 662 return 1; 663 } 664 665 /* 666 * Mark the basic rates for the rate table based on the 667 * operating mode. For real 11g we mark all the 11b rates 668 * and 6, 12, and 24 OFDM. For 11b compatibility we mark only 669 * 11b rates. There's also a pseudo 11a-mode used to mark only 670 * the basic OFDM rates. 671 */ 672 static void 673 setbasicrates(struct ieee80211_rateset *rs, 674 enum ieee80211_phymode mode, int add) 675 { 676 static const struct ieee80211_rateset basic[IEEE80211_MODE_MAX] = { 677 [IEEE80211_MODE_11A] = { 3, { 12, 24, 48 } }, 678 [IEEE80211_MODE_11B] = { 2, { 2, 4 } }, 679 /* NB: mixed b/g */ 680 [IEEE80211_MODE_11G] = { 4, { 2, 4, 11, 22 } }, 681 [IEEE80211_MODE_TURBO_A] = { 3, { 12, 24, 48 } }, 682 [IEEE80211_MODE_TURBO_G] = { 4, { 2, 4, 11, 22 } }, 683 [IEEE80211_MODE_STURBO_A] = { 3, { 12, 24, 48 } }, 684 [IEEE80211_MODE_HALF] = { 3, { 6, 12, 24 } }, 685 [IEEE80211_MODE_QUARTER] = { 3, { 3, 6, 12 } }, 686 [IEEE80211_MODE_11NA] = { 3, { 12, 24, 48 } }, 687 /* NB: mixed b/g */ 688 [IEEE80211_MODE_11NG] = { 4, { 2, 4, 11, 22 } }, 689 }; 690 int i, j; 691 692 for (i = 0; i < rs->rs_nrates; i++) { 693 if (!add) 694 rs->rs_rates[i] &= IEEE80211_RATE_VAL; 695 for (j = 0; j < basic[mode].rs_nrates; j++) 696 if (basic[mode].rs_rates[j] == rs->rs_rates[i]) { 697 rs->rs_rates[i] |= IEEE80211_RATE_BASIC; 698 break; 699 } 700 } 701 } 702 703 /* 704 * Set the basic rates in a rate set. 705 */ 706 void 707 ieee80211_setbasicrates(struct ieee80211_rateset *rs, 708 enum ieee80211_phymode mode) 709 { 710 setbasicrates(rs, mode, 0); 711 } 712 713 /* 714 * Add basic rates to a rate set. 715 */ 716 void 717 ieee80211_addbasicrates(struct ieee80211_rateset *rs, 718 enum ieee80211_phymode mode) 719 { 720 setbasicrates(rs, mode, 1); 721 } 722 723 /* 724 * WME protocol support. 725 * 726 * The default 11a/b/g/n parameters come from the WiFi Alliance WMM 727 * System Interopability Test Plan (v1.4, Appendix F) and the 802.11n 728 * Draft 2.0 Test Plan (Appendix D). 729 * 730 * Static/Dynamic Turbo mode settings come from Atheros. 731 */ 732 typedef struct phyParamType { 733 uint8_t aifsn; 734 uint8_t logcwmin; 735 uint8_t logcwmax; 736 uint16_t txopLimit; 737 uint8_t acm; 738 } paramType; 739 740 static const struct phyParamType phyParamForAC_BE[IEEE80211_MODE_MAX] = { 741 [IEEE80211_MODE_AUTO] = { 3, 4, 6, 0, 0 }, 742 [IEEE80211_MODE_11A] = { 3, 4, 6, 0, 0 }, 743 [IEEE80211_MODE_11B] = { 3, 4, 6, 0, 0 }, 744 [IEEE80211_MODE_11G] = { 3, 4, 6, 0, 0 }, 745 [IEEE80211_MODE_FH] = { 3, 4, 6, 0, 0 }, 746 [IEEE80211_MODE_TURBO_A]= { 2, 3, 5, 0, 0 }, 747 [IEEE80211_MODE_TURBO_G]= { 2, 3, 5, 0, 0 }, 748 [IEEE80211_MODE_STURBO_A]={ 2, 3, 5, 0, 0 }, 749 [IEEE80211_MODE_HALF] = { 3, 4, 6, 0, 0 }, 750 [IEEE80211_MODE_QUARTER]= { 3, 4, 6, 0, 0 }, 751 [IEEE80211_MODE_11NA] = { 3, 4, 6, 0, 0 }, 752 [IEEE80211_MODE_11NG] = { 3, 4, 6, 0, 0 }, 753 }; 754 static const struct phyParamType phyParamForAC_BK[IEEE80211_MODE_MAX] = { 755 [IEEE80211_MODE_AUTO] = { 7, 4, 10, 0, 0 }, 756 [IEEE80211_MODE_11A] = { 7, 4, 10, 0, 0 }, 757 [IEEE80211_MODE_11B] = { 7, 4, 10, 0, 0 }, 758 [IEEE80211_MODE_11G] = { 7, 4, 10, 0, 0 }, 759 [IEEE80211_MODE_FH] = { 7, 4, 10, 0, 0 }, 760 [IEEE80211_MODE_TURBO_A]= { 7, 3, 10, 0, 0 }, 761 [IEEE80211_MODE_TURBO_G]= { 7, 3, 10, 0, 0 }, 762 [IEEE80211_MODE_STURBO_A]={ 7, 3, 10, 0, 0 }, 763 [IEEE80211_MODE_HALF] = { 7, 4, 10, 0, 0 }, 764 [IEEE80211_MODE_QUARTER]= { 7, 4, 10, 0, 0 }, 765 [IEEE80211_MODE_11NA] = { 7, 4, 10, 0, 0 }, 766 [IEEE80211_MODE_11NG] = { 7, 4, 10, 0, 0 }, 767 }; 768 static const struct phyParamType phyParamForAC_VI[IEEE80211_MODE_MAX] = { 769 [IEEE80211_MODE_AUTO] = { 1, 3, 4, 94, 0 }, 770 [IEEE80211_MODE_11A] = { 1, 3, 4, 94, 0 }, 771 [IEEE80211_MODE_11B] = { 1, 3, 4, 188, 0 }, 772 [IEEE80211_MODE_11G] = { 1, 3, 4, 94, 0 }, 773 [IEEE80211_MODE_FH] = { 1, 3, 4, 188, 0 }, 774 [IEEE80211_MODE_TURBO_A]= { 1, 2, 3, 94, 0 }, 775 [IEEE80211_MODE_TURBO_G]= { 1, 2, 3, 94, 0 }, 776 [IEEE80211_MODE_STURBO_A]={ 1, 2, 3, 94, 0 }, 777 [IEEE80211_MODE_HALF] = { 1, 3, 4, 94, 0 }, 778 [IEEE80211_MODE_QUARTER]= { 1, 3, 4, 94, 0 }, 779 [IEEE80211_MODE_11NA] = { 1, 3, 4, 94, 0 }, 780 [IEEE80211_MODE_11NG] = { 1, 3, 4, 94, 0 }, 781 }; 782 static const struct phyParamType phyParamForAC_VO[IEEE80211_MODE_MAX] = { 783 [IEEE80211_MODE_AUTO] = { 1, 2, 3, 47, 0 }, 784 [IEEE80211_MODE_11A] = { 1, 2, 3, 47, 0 }, 785 [IEEE80211_MODE_11B] = { 1, 2, 3, 102, 0 }, 786 [IEEE80211_MODE_11G] = { 1, 2, 3, 47, 0 }, 787 [IEEE80211_MODE_FH] = { 1, 2, 3, 102, 0 }, 788 [IEEE80211_MODE_TURBO_A]= { 1, 2, 2, 47, 0 }, 789 [IEEE80211_MODE_TURBO_G]= { 1, 2, 2, 47, 0 }, 790 [IEEE80211_MODE_STURBO_A]={ 1, 2, 2, 47, 0 }, 791 [IEEE80211_MODE_HALF] = { 1, 2, 3, 47, 0 }, 792 [IEEE80211_MODE_QUARTER]= { 1, 2, 3, 47, 0 }, 793 [IEEE80211_MODE_11NA] = { 1, 2, 3, 47, 0 }, 794 [IEEE80211_MODE_11NG] = { 1, 2, 3, 47, 0 }, 795 }; 796 797 static const struct phyParamType bssPhyParamForAC_BE[IEEE80211_MODE_MAX] = { 798 [IEEE80211_MODE_AUTO] = { 3, 4, 10, 0, 0 }, 799 [IEEE80211_MODE_11A] = { 3, 4, 10, 0, 0 }, 800 [IEEE80211_MODE_11B] = { 3, 4, 10, 0, 0 }, 801 [IEEE80211_MODE_11G] = { 3, 4, 10, 0, 0 }, 802 [IEEE80211_MODE_FH] = { 3, 4, 10, 0, 0 }, 803 [IEEE80211_MODE_TURBO_A]= { 2, 3, 10, 0, 0 }, 804 [IEEE80211_MODE_TURBO_G]= { 2, 3, 10, 0, 0 }, 805 [IEEE80211_MODE_STURBO_A]={ 2, 3, 10, 0, 0 }, 806 [IEEE80211_MODE_HALF] = { 3, 4, 10, 0, 0 }, 807 [IEEE80211_MODE_QUARTER]= { 3, 4, 10, 0, 0 }, 808 [IEEE80211_MODE_11NA] = { 3, 4, 10, 0, 0 }, 809 [IEEE80211_MODE_11NG] = { 3, 4, 10, 0, 0 }, 810 }; 811 static const struct phyParamType bssPhyParamForAC_VI[IEEE80211_MODE_MAX] = { 812 [IEEE80211_MODE_AUTO] = { 2, 3, 4, 94, 0 }, 813 [IEEE80211_MODE_11A] = { 2, 3, 4, 94, 0 }, 814 [IEEE80211_MODE_11B] = { 2, 3, 4, 188, 0 }, 815 [IEEE80211_MODE_11G] = { 2, 3, 4, 94, 0 }, 816 [IEEE80211_MODE_FH] = { 2, 3, 4, 188, 0 }, 817 [IEEE80211_MODE_TURBO_A]= { 2, 2, 3, 94, 0 }, 818 [IEEE80211_MODE_TURBO_G]= { 2, 2, 3, 94, 0 }, 819 [IEEE80211_MODE_STURBO_A]={ 2, 2, 3, 94, 0 }, 820 [IEEE80211_MODE_HALF] = { 2, 3, 4, 94, 0 }, 821 [IEEE80211_MODE_QUARTER]= { 2, 3, 4, 94, 0 }, 822 [IEEE80211_MODE_11NA] = { 2, 3, 4, 94, 0 }, 823 [IEEE80211_MODE_11NG] = { 2, 3, 4, 94, 0 }, 824 }; 825 static const struct phyParamType bssPhyParamForAC_VO[IEEE80211_MODE_MAX] = { 826 [IEEE80211_MODE_AUTO] = { 2, 2, 3, 47, 0 }, 827 [IEEE80211_MODE_11A] = { 2, 2, 3, 47, 0 }, 828 [IEEE80211_MODE_11B] = { 2, 2, 3, 102, 0 }, 829 [IEEE80211_MODE_11G] = { 2, 2, 3, 47, 0 }, 830 [IEEE80211_MODE_FH] = { 2, 2, 3, 102, 0 }, 831 [IEEE80211_MODE_TURBO_A]= { 1, 2, 2, 47, 0 }, 832 [IEEE80211_MODE_TURBO_G]= { 1, 2, 2, 47, 0 }, 833 [IEEE80211_MODE_STURBO_A]={ 1, 2, 2, 47, 0 }, 834 [IEEE80211_MODE_HALF] = { 2, 2, 3, 47, 0 }, 835 [IEEE80211_MODE_QUARTER]= { 2, 2, 3, 47, 0 }, 836 [IEEE80211_MODE_11NA] = { 2, 2, 3, 47, 0 }, 837 [IEEE80211_MODE_11NG] = { 2, 2, 3, 47, 0 }, 838 }; 839 840 static void 841 _setifsparams(struct wmeParams *wmep, const paramType *phy) 842 { 843 wmep->wmep_aifsn = phy->aifsn; 844 wmep->wmep_logcwmin = phy->logcwmin; 845 wmep->wmep_logcwmax = phy->logcwmax; 846 wmep->wmep_txopLimit = phy->txopLimit; 847 } 848 849 static void 850 setwmeparams(struct ieee80211vap *vap, const char *type, int ac, 851 struct wmeParams *wmep, const paramType *phy) 852 { 853 wmep->wmep_acm = phy->acm; 854 _setifsparams(wmep, phy); 855 856 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 857 "set %s (%s) [acm %u aifsn %u logcwmin %u logcwmax %u txop %u]\n", 858 ieee80211_wme_acnames[ac], type, 859 wmep->wmep_acm, wmep->wmep_aifsn, wmep->wmep_logcwmin, 860 wmep->wmep_logcwmax, wmep->wmep_txopLimit); 861 } 862 863 static void 864 ieee80211_wme_initparams_locked(struct ieee80211vap *vap) 865 { 866 struct ieee80211com *ic = vap->iv_ic; 867 struct ieee80211_wme_state *wme = &ic->ic_wme; 868 const paramType *pPhyParam, *pBssPhyParam; 869 struct wmeParams *wmep; 870 enum ieee80211_phymode mode; 871 int i; 872 873 if ((ic->ic_caps & IEEE80211_C_WME) == 0 || ic->ic_nrunning > 1) 874 return; 875 876 /* 877 * Select mode; we can be called early in which case we 878 * always use auto mode. We know we'll be called when 879 * entering the RUN state with bsschan setup properly 880 * so state will eventually get set correctly 881 */ 882 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC) 883 mode = ieee80211_chan2mode(ic->ic_bsschan); 884 else 885 mode = IEEE80211_MODE_AUTO; 886 for (i = 0; i < WME_NUM_AC; i++) { 887 switch (i) { 888 case WME_AC_BK: 889 pPhyParam = &phyParamForAC_BK[mode]; 890 pBssPhyParam = &phyParamForAC_BK[mode]; 891 break; 892 case WME_AC_VI: 893 pPhyParam = &phyParamForAC_VI[mode]; 894 pBssPhyParam = &bssPhyParamForAC_VI[mode]; 895 break; 896 case WME_AC_VO: 897 pPhyParam = &phyParamForAC_VO[mode]; 898 pBssPhyParam = &bssPhyParamForAC_VO[mode]; 899 break; 900 case WME_AC_BE: 901 default: 902 pPhyParam = &phyParamForAC_BE[mode]; 903 pBssPhyParam = &bssPhyParamForAC_BE[mode]; 904 break; 905 } 906 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i]; 907 if (ic->ic_opmode == IEEE80211_M_HOSTAP) { 908 setwmeparams(vap, "chan", i, wmep, pPhyParam); 909 } else { 910 setwmeparams(vap, "chan", i, wmep, pBssPhyParam); 911 } 912 wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i]; 913 setwmeparams(vap, "bss ", i, wmep, pBssPhyParam); 914 } 915 /* NB: check ic_bss to avoid NULL deref on initial attach */ 916 if (vap->iv_bss != NULL) { 917 /* 918 * Calculate agressive mode switching threshold based 919 * on beacon interval. This doesn't need locking since 920 * we're only called before entering the RUN state at 921 * which point we start sending beacon frames. 922 */ 923 wme->wme_hipri_switch_thresh = 924 (HIGH_PRI_SWITCH_THRESH * vap->iv_bss->ni_intval) / 100; 925 wme->wme_flags &= ~WME_F_AGGRMODE; 926 ieee80211_wme_updateparams(vap); 927 } 928 } 929 930 void 931 ieee80211_wme_initparams(struct ieee80211vap *vap) 932 { 933 struct ieee80211com *ic = vap->iv_ic; 934 935 ic = vap->iv_ic; 936 ieee80211_wme_initparams_locked(vap); 937 } 938 939 /* 940 * Update WME parameters for ourself and the BSS. 941 */ 942 void 943 ieee80211_wme_updateparams_locked(struct ieee80211vap *vap) 944 { 945 static const paramType aggrParam[IEEE80211_MODE_MAX] = { 946 [IEEE80211_MODE_AUTO] = { 2, 4, 10, 64, 0 }, 947 [IEEE80211_MODE_11A] = { 2, 4, 10, 64, 0 }, 948 [IEEE80211_MODE_11B] = { 2, 5, 10, 64, 0 }, 949 [IEEE80211_MODE_11G] = { 2, 4, 10, 64, 0 }, 950 [IEEE80211_MODE_FH] = { 2, 5, 10, 64, 0 }, 951 [IEEE80211_MODE_TURBO_A] = { 1, 3, 10, 64, 0 }, 952 [IEEE80211_MODE_TURBO_G] = { 1, 3, 10, 64, 0 }, 953 [IEEE80211_MODE_STURBO_A] = { 1, 3, 10, 64, 0 }, 954 [IEEE80211_MODE_HALF] = { 2, 4, 10, 64, 0 }, 955 [IEEE80211_MODE_QUARTER] = { 2, 4, 10, 64, 0 }, 956 [IEEE80211_MODE_11NA] = { 2, 4, 10, 64, 0 }, /* XXXcheck*/ 957 [IEEE80211_MODE_11NG] = { 2, 4, 10, 64, 0 }, /* XXXcheck*/ 958 }; 959 struct ieee80211com *ic = vap->iv_ic; 960 struct ieee80211_wme_state *wme = &ic->ic_wme; 961 const struct wmeParams *wmep; 962 struct wmeParams *chanp, *bssp; 963 enum ieee80211_phymode mode; 964 int i; 965 966 /* 967 * Set up the channel access parameters for the physical 968 * device. First populate the configured settings. 969 */ 970 for (i = 0; i < WME_NUM_AC; i++) { 971 chanp = &wme->wme_chanParams.cap_wmeParams[i]; 972 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i]; 973 chanp->wmep_aifsn = wmep->wmep_aifsn; 974 chanp->wmep_logcwmin = wmep->wmep_logcwmin; 975 chanp->wmep_logcwmax = wmep->wmep_logcwmax; 976 chanp->wmep_txopLimit = wmep->wmep_txopLimit; 977 978 chanp = &wme->wme_bssChanParams.cap_wmeParams[i]; 979 wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i]; 980 chanp->wmep_aifsn = wmep->wmep_aifsn; 981 chanp->wmep_logcwmin = wmep->wmep_logcwmin; 982 chanp->wmep_logcwmax = wmep->wmep_logcwmax; 983 chanp->wmep_txopLimit = wmep->wmep_txopLimit; 984 } 985 986 /* 987 * Select mode; we can be called early in which case we 988 * always use auto mode. We know we'll be called when 989 * entering the RUN state with bsschan setup properly 990 * so state will eventually get set correctly 991 */ 992 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC) 993 mode = ieee80211_chan2mode(ic->ic_bsschan); 994 else 995 mode = IEEE80211_MODE_AUTO; 996 997 /* 998 * This implements agressive mode as found in certain 999 * vendors' AP's. When there is significant high 1000 * priority (VI/VO) traffic in the BSS throttle back BE 1001 * traffic by using conservative parameters. Otherwise 1002 * BE uses agressive params to optimize performance of 1003 * legacy/non-QoS traffic. 1004 */ 1005 if ((vap->iv_opmode == IEEE80211_M_HOSTAP && 1006 (wme->wme_flags & WME_F_AGGRMODE) != 0) || 1007 (vap->iv_opmode == IEEE80211_M_STA && 1008 (vap->iv_bss->ni_flags & IEEE80211_NODE_QOS) == 0) || 1009 (vap->iv_flags & IEEE80211_F_WME) == 0) { 1010 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE]; 1011 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE]; 1012 1013 chanp->wmep_aifsn = bssp->wmep_aifsn = aggrParam[mode].aifsn; 1014 chanp->wmep_logcwmin = bssp->wmep_logcwmin = 1015 aggrParam[mode].logcwmin; 1016 chanp->wmep_logcwmax = bssp->wmep_logcwmax = 1017 aggrParam[mode].logcwmax; 1018 chanp->wmep_txopLimit = bssp->wmep_txopLimit = 1019 (vap->iv_flags & IEEE80211_F_BURST) ? 1020 aggrParam[mode].txopLimit : 0; 1021 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 1022 "update %s (chan+bss) [acm %u aifsn %u logcwmin %u " 1023 "logcwmax %u txop %u]\n", ieee80211_wme_acnames[WME_AC_BE], 1024 chanp->wmep_acm, chanp->wmep_aifsn, chanp->wmep_logcwmin, 1025 chanp->wmep_logcwmax, chanp->wmep_txopLimit); 1026 } 1027 1028 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 1029 ic->ic_sta_assoc < 2 && (wme->wme_flags & WME_F_AGGRMODE) != 0) { 1030 static const uint8_t logCwMin[IEEE80211_MODE_MAX] = { 1031 [IEEE80211_MODE_AUTO] = 3, 1032 [IEEE80211_MODE_11A] = 3, 1033 [IEEE80211_MODE_11B] = 4, 1034 [IEEE80211_MODE_11G] = 3, 1035 [IEEE80211_MODE_FH] = 4, 1036 [IEEE80211_MODE_TURBO_A] = 3, 1037 [IEEE80211_MODE_TURBO_G] = 3, 1038 [IEEE80211_MODE_STURBO_A] = 3, 1039 [IEEE80211_MODE_HALF] = 3, 1040 [IEEE80211_MODE_QUARTER] = 3, 1041 [IEEE80211_MODE_11NA] = 3, 1042 [IEEE80211_MODE_11NG] = 3, 1043 }; 1044 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE]; 1045 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE]; 1046 1047 chanp->wmep_logcwmin = bssp->wmep_logcwmin = logCwMin[mode]; 1048 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 1049 "update %s (chan+bss) logcwmin %u\n", 1050 ieee80211_wme_acnames[WME_AC_BE], chanp->wmep_logcwmin); 1051 } 1052 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { /* XXX ibss? */ 1053 /* 1054 * Arrange for a beacon update and bump the parameter 1055 * set number so associated stations load the new values. 1056 */ 1057 wme->wme_bssChanParams.cap_info = 1058 (wme->wme_bssChanParams.cap_info+1) & WME_QOSINFO_COUNT; 1059 ieee80211_beacon_notify(vap, IEEE80211_BEACON_WME); 1060 } 1061 1062 wme->wme_update(ic); 1063 1064 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 1065 "%s: WME params updated, cap_info 0x%x\n", __func__, 1066 vap->iv_opmode == IEEE80211_M_STA ? 1067 wme->wme_wmeChanParams.cap_info : 1068 wme->wme_bssChanParams.cap_info); 1069 } 1070 1071 void 1072 ieee80211_wme_updateparams(struct ieee80211vap *vap) 1073 { 1074 struct ieee80211com *ic = vap->iv_ic; 1075 1076 if (ic->ic_caps & IEEE80211_C_WME) { 1077 ieee80211_wme_updateparams_locked(vap); 1078 } 1079 } 1080 1081 static void 1082 parent_updown_task(void *arg, int npending) 1083 { 1084 struct ifnet *parent = arg; 1085 1086 wlan_serialize_enter(); 1087 parent->if_ioctl(parent, SIOCSIFFLAGS, NULL, curthread->td_ucred); 1088 wlan_serialize_exit(); 1089 } 1090 1091 static void 1092 update_mcast_task(void *arg, int npending) 1093 { 1094 struct ieee80211com *ic = arg; 1095 struct ifnet *parent = ic->ic_ifp; 1096 1097 wlan_serialize_enter(); 1098 ic->ic_update_mcast(parent); 1099 wlan_serialize_exit(); 1100 } 1101 1102 static void 1103 update_promisc_task(void *arg, int npending) 1104 { 1105 struct ieee80211com *ic = arg; 1106 struct ifnet *parent = ic->ic_ifp; 1107 1108 wlan_serialize_enter(); 1109 ic->ic_update_promisc(parent); 1110 wlan_serialize_exit(); 1111 } 1112 1113 static void 1114 update_channel_task(void *arg, int npending) 1115 { 1116 struct ieee80211com *ic = arg; 1117 1118 wlan_serialize_enter(); 1119 ic->ic_set_channel(ic); 1120 ieee80211_radiotap_chan_change(ic); 1121 wlan_serialize_exit(); 1122 } 1123 1124 /* 1125 * Block until the parent is in a known state. This is 1126 * used after any operations that dispatch a task (e.g. 1127 * to auto-configure the parent device up/down). 1128 */ 1129 void 1130 ieee80211_waitfor_parent(struct ieee80211com *ic) 1131 { 1132 wlan_assert_serialized(); 1133 wlan_serialize_exit(); /* exit to block */ 1134 taskqueue_block(ic->ic_tq); 1135 ieee80211_draintask(ic, &ic->ic_parent_task); 1136 ieee80211_draintask(ic, &ic->ic_mcast_task); 1137 ieee80211_draintask(ic, &ic->ic_promisc_task); 1138 ieee80211_draintask(ic, &ic->ic_chan_task); 1139 ieee80211_draintask(ic, &ic->ic_bmiss_task); 1140 taskqueue_unblock(ic->ic_tq); 1141 wlan_serialize_enter(); /* then re-enter */ 1142 } 1143 1144 /* 1145 * Start a vap running. If this is the first vap to be 1146 * set running on the underlying device then we 1147 * automatically bring the device up. 1148 */ 1149 void 1150 ieee80211_start_locked(struct ieee80211vap *vap) 1151 { 1152 struct ifnet *ifp = vap->iv_ifp; 1153 struct ieee80211com *ic = vap->iv_ic; 1154 struct ifnet *parent = ic->ic_ifp; 1155 1156 IEEE80211_DPRINTF(vap, 1157 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1158 "start running, %d vaps running\n", ic->ic_nrunning); 1159 1160 if ((ifp->if_flags & IFF_RUNNING) == 0) { 1161 /* 1162 * Mark us running. Note that it's ok to do this first; 1163 * if we need to bring the parent device up we defer that 1164 * to avoid dropping the com lock. We expect the device 1165 * to respond to being marked up by calling back into us 1166 * through ieee80211_start_all at which point we'll come 1167 * back in here and complete the work. 1168 */ 1169 ifp->if_flags |= IFF_RUNNING; 1170 /* 1171 * We are not running; if this we are the first vap 1172 * to be brought up auto-up the parent if necessary. 1173 */ 1174 if (ic->ic_nrunning++ == 0 && 1175 (parent->if_flags & IFF_RUNNING) == 0) { 1176 IEEE80211_DPRINTF(vap, 1177 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1178 "%s: up parent %s\n", __func__, parent->if_xname); 1179 parent->if_flags |= IFF_UP; 1180 ieee80211_runtask(ic, &ic->ic_parent_task); 1181 return; 1182 } 1183 } 1184 /* 1185 * If the parent is up and running, then kick the 1186 * 802.11 state machine as appropriate. 1187 */ 1188 if ((parent->if_flags & IFF_RUNNING) && 1189 vap->iv_roaming != IEEE80211_ROAMING_MANUAL) { 1190 if (vap->iv_opmode == IEEE80211_M_STA) { 1191 #if 0 1192 /* XXX bypasses scan too easily; disable for now */ 1193 /* 1194 * Try to be intelligent about clocking the state 1195 * machine. If we're currently in RUN state then 1196 * we should be able to apply any new state/parameters 1197 * simply by re-associating. Otherwise we need to 1198 * re-scan to select an appropriate ap. 1199 */ 1200 if (vap->iv_state >= IEEE80211_S_RUN) 1201 ieee80211_new_state_locked(vap, 1202 IEEE80211_S_ASSOC, 1); 1203 else 1204 #endif 1205 ieee80211_new_state_locked(vap, 1206 IEEE80211_S_SCAN, 0); 1207 } else { 1208 /* 1209 * For monitor+wds mode there's nothing to do but 1210 * start running. Otherwise if this is the first 1211 * vap to be brought up, start a scan which may be 1212 * preempted if the station is locked to a particular 1213 * channel. 1214 */ 1215 vap->iv_flags_ext |= IEEE80211_FEXT_REINIT; 1216 if (vap->iv_opmode == IEEE80211_M_MONITOR || 1217 vap->iv_opmode == IEEE80211_M_WDS) 1218 ieee80211_new_state_locked(vap, 1219 IEEE80211_S_RUN, -1); 1220 else 1221 ieee80211_new_state_locked(vap, 1222 IEEE80211_S_SCAN, 0); 1223 } 1224 } 1225 } 1226 1227 /* 1228 * Start a single vap. 1229 */ 1230 void 1231 ieee80211_init(void *arg) 1232 { 1233 struct ieee80211vap *vap = arg; 1234 1235 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1236 "%s\n", __func__); 1237 1238 ieee80211_start_locked(vap); 1239 } 1240 1241 /* 1242 * Start all runnable vap's on a device. 1243 */ 1244 void 1245 ieee80211_start_all(struct ieee80211com *ic) 1246 { 1247 struct ieee80211vap *vap; 1248 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 } 1255 1256 /* 1257 * Stop a vap. We force it down using the state machine 1258 * then mark it's ifnet not running. If this is the last 1259 * vap running on the underlying device then we close it 1260 * too to insure it will be properly initialized when the 1261 * next vap is brought up. 1262 */ 1263 void 1264 ieee80211_stop_locked(struct ieee80211vap *vap) 1265 { 1266 struct ieee80211com *ic = vap->iv_ic; 1267 struct ifnet *ifp = vap->iv_ifp; 1268 struct ifnet *parent = ic->ic_ifp; 1269 1270 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1271 "stop running, %d vaps running\n", ic->ic_nrunning); 1272 1273 ieee80211_new_state_locked(vap, IEEE80211_S_INIT, -1); 1274 if (ifp->if_flags & IFF_RUNNING) { 1275 ifp->if_flags &= ~IFF_RUNNING; /* mark us stopped */ 1276 if (--ic->ic_nrunning == 0 && 1277 (parent->if_flags & IFF_RUNNING)) { 1278 IEEE80211_DPRINTF(vap, 1279 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1280 "down parent %s\n", parent->if_xname); 1281 parent->if_flags &= ~IFF_UP; 1282 ieee80211_runtask(ic, &ic->ic_parent_task); 1283 } 1284 } 1285 } 1286 1287 void 1288 ieee80211_stop(struct ieee80211vap *vap) 1289 { 1290 struct ieee80211com *ic = vap->iv_ic; 1291 1292 ic = vap->iv_ic; 1293 ieee80211_stop_locked(vap); 1294 } 1295 1296 /* 1297 * Stop all vap's running on a device. 1298 */ 1299 void 1300 ieee80211_stop_all(struct ieee80211com *ic) 1301 { 1302 struct ieee80211vap *vap; 1303 1304 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1305 struct ifnet *ifp = vap->iv_ifp; 1306 if (IFNET_IS_UP_RUNNING(ifp)) /* NB: avoid recursion */ 1307 ieee80211_stop_locked(vap); 1308 } 1309 1310 ieee80211_waitfor_parent(ic); 1311 } 1312 1313 /* 1314 * Stop all vap's running on a device and arrange 1315 * for those that were running to be resumed. 1316 */ 1317 void 1318 ieee80211_suspend_all(struct ieee80211com *ic) 1319 { 1320 struct ieee80211vap *vap; 1321 1322 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1323 struct ifnet *ifp = vap->iv_ifp; 1324 if (IFNET_IS_UP_RUNNING(ifp)) { /* NB: avoid recursion */ 1325 vap->iv_flags_ext |= IEEE80211_FEXT_RESUME; 1326 ieee80211_stop_locked(vap); 1327 } 1328 } 1329 1330 ieee80211_waitfor_parent(ic); 1331 } 1332 1333 /* 1334 * Start all vap's marked for resume. 1335 */ 1336 void 1337 ieee80211_resume_all(struct ieee80211com *ic) 1338 { 1339 struct ieee80211vap *vap; 1340 1341 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1342 struct ifnet *ifp = vap->iv_ifp; 1343 if (!IFNET_IS_UP_RUNNING(ifp) && 1344 (vap->iv_flags_ext & IEEE80211_FEXT_RESUME)) { 1345 vap->iv_flags_ext &= ~IEEE80211_FEXT_RESUME; 1346 ieee80211_start_locked(vap); 1347 } 1348 } 1349 } 1350 1351 void 1352 ieee80211_beacon_miss(struct ieee80211com *ic) 1353 { 1354 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 1355 /* Process in a taskq, the handler may reenter the driver */ 1356 ieee80211_runtask(ic, &ic->ic_bmiss_task); 1357 } 1358 } 1359 1360 static void 1361 beacon_miss_task(void *arg, int npending) 1362 { 1363 struct ieee80211com *ic = arg; 1364 struct ieee80211vap *vap; 1365 1366 wlan_serialize_enter(); 1367 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1368 /* 1369 * We only pass events through for sta vap's in RUN state; 1370 * may be too restrictive but for now this saves all the 1371 * handlers duplicating these checks. 1372 */ 1373 if (vap->iv_opmode == IEEE80211_M_STA && 1374 vap->iv_state >= IEEE80211_S_RUN && 1375 vap->iv_bmiss != NULL) 1376 vap->iv_bmiss(vap); 1377 } 1378 wlan_serialize_exit(); 1379 } 1380 1381 static void 1382 beacon_swmiss_task(void *arg, int npending) 1383 { 1384 struct ieee80211vap *vap = arg; 1385 1386 wlan_serialize_enter(); 1387 if (vap->iv_state == IEEE80211_S_RUN) { 1388 /* XXX Call multiple times if npending > zero? */ 1389 vap->iv_bmiss(vap); 1390 } 1391 wlan_serialize_exit(); 1392 } 1393 1394 /* 1395 * Software beacon miss handling. Check if any beacons 1396 * were received in the last period. If not post a 1397 * beacon miss; otherwise reset the counter. 1398 */ 1399 void 1400 ieee80211_swbmiss_callout(void *arg) 1401 { 1402 struct ieee80211vap *vap = arg; 1403 struct ieee80211com *ic = vap->iv_ic; 1404 1405 wlan_serialize_enter(); 1406 KASSERT(vap->iv_state == IEEE80211_S_RUN, 1407 ("wrong state %d", vap->iv_state)); 1408 1409 if (ic->ic_flags & IEEE80211_F_SCAN) { 1410 /* 1411 * If scanning just ignore and reset state. If we get a 1412 * bmiss after coming out of scan because we haven't had 1413 * time to receive a beacon then we should probe the AP 1414 * before posting a real bmiss (unless iv_bmiss_max has 1415 * been artifiically lowered). A cleaner solution might 1416 * be to disable the timer on scan start/end but to handle 1417 * case of multiple sta vap's we'd need to disable the 1418 * timers of all affected vap's. 1419 */ 1420 vap->iv_swbmiss_count = 0; 1421 } else if (vap->iv_swbmiss_count == 0) { 1422 if (vap->iv_bmiss != NULL) 1423 ieee80211_runtask(ic, &vap->iv_swbmiss_task); 1424 if (vap->iv_bmiss_count == 0) /* don't re-arm timer */ 1425 goto done; 1426 } else { 1427 vap->iv_swbmiss_count = 0; 1428 } 1429 callout_reset(&vap->iv_swbmiss, vap->iv_swbmiss_period, 1430 ieee80211_swbmiss_callout, vap); 1431 done: 1432 wlan_serialize_exit(); 1433 } 1434 1435 /* 1436 * Start an 802.11h channel switch. We record the parameters, 1437 * mark the operation pending, notify each vap through the 1438 * beacon update mechanism so it can update the beacon frame 1439 * contents, and then switch vap's to CSA state to block outbound 1440 * traffic. Devices that handle CSA directly can use the state 1441 * switch to do the right thing so long as they call 1442 * ieee80211_csa_completeswitch when it's time to complete the 1443 * channel change. Devices that depend on the net80211 layer can 1444 * use ieee80211_beacon_update to handle the countdown and the 1445 * channel switch. 1446 */ 1447 void 1448 ieee80211_csa_startswitch(struct ieee80211com *ic, 1449 struct ieee80211_channel *c, int mode, int count) 1450 { 1451 struct ieee80211vap *vap; 1452 1453 ic->ic_csa_newchan = c; 1454 ic->ic_csa_mode = mode; 1455 ic->ic_csa_count = count; 1456 ic->ic_flags |= IEEE80211_F_CSAPENDING; 1457 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1458 if (vap->iv_opmode == IEEE80211_M_HOSTAP || 1459 vap->iv_opmode == IEEE80211_M_IBSS || 1460 vap->iv_opmode == IEEE80211_M_MBSS) 1461 ieee80211_beacon_notify(vap, IEEE80211_BEACON_CSA); 1462 /* switch to CSA state to block outbound traffic */ 1463 if (vap->iv_state == IEEE80211_S_RUN) 1464 ieee80211_new_state_locked(vap, IEEE80211_S_CSA, 0); 1465 } 1466 ieee80211_notify_csa(ic, c, mode, count); 1467 } 1468 1469 static void 1470 csa_completeswitch(struct ieee80211com *ic) 1471 { 1472 struct ieee80211vap *vap; 1473 1474 ic->ic_csa_newchan = NULL; 1475 ic->ic_flags &= ~IEEE80211_F_CSAPENDING; 1476 1477 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1478 if (vap->iv_state == IEEE80211_S_CSA) 1479 ieee80211_new_state_locked(vap, IEEE80211_S_RUN, 0); 1480 } 1481 1482 /* 1483 * Complete an 802.11h channel switch started by ieee80211_csa_startswitch. 1484 * We clear state and move all vap's in CSA state to RUN state 1485 * so they can again transmit. 1486 */ 1487 void 1488 ieee80211_csa_completeswitch(struct ieee80211com *ic) 1489 { 1490 KASSERT(ic->ic_flags & IEEE80211_F_CSAPENDING, ("csa not pending")); 1491 1492 ieee80211_setcurchan(ic, ic->ic_csa_newchan); 1493 csa_completeswitch(ic); 1494 } 1495 1496 /* 1497 * Cancel an 802.11h channel switch started by ieee80211_csa_startswitch. 1498 * We clear state and move all vap's in CSA state to RUN state 1499 * so they can again transmit. 1500 */ 1501 void 1502 ieee80211_csa_cancelswitch(struct ieee80211com *ic) 1503 { 1504 csa_completeswitch(ic); 1505 } 1506 1507 /* 1508 * Complete a DFS CAC started by ieee80211_dfs_cac_start. 1509 * We clear state and move all vap's in CAC state to RUN state. 1510 */ 1511 void 1512 ieee80211_cac_completeswitch(struct ieee80211vap *vap0) 1513 { 1514 struct ieee80211com *ic = vap0->iv_ic; 1515 struct ieee80211vap *vap; 1516 1517 /* 1518 * Complete CAC state change for lead vap first; then 1519 * clock all the other vap's waiting. 1520 */ 1521 KASSERT(vap0->iv_state == IEEE80211_S_CAC, 1522 ("wrong state %d", vap0->iv_state)); 1523 ieee80211_new_state_locked(vap0, IEEE80211_S_RUN, 0); 1524 1525 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1526 if (vap->iv_state == IEEE80211_S_CAC) 1527 ieee80211_new_state_locked(vap, IEEE80211_S_RUN, 0); 1528 } 1529 1530 /* 1531 * Force all vap's other than the specified vap to the INIT state 1532 * and mark them as waiting for a scan to complete. These vaps 1533 * will be brought up when the scan completes and the scanning vap 1534 * reaches RUN state by wakeupwaiting. 1535 */ 1536 static void 1537 markwaiting(struct ieee80211vap *vap0) 1538 { 1539 struct ieee80211com *ic = vap0->iv_ic; 1540 struct ieee80211vap *vap; 1541 1542 /* 1543 * A vap list entry can not disappear since we are running on the 1544 * taskqueue and a vap destroy will queue and drain another state 1545 * change task. 1546 */ 1547 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1548 if (vap == vap0) 1549 continue; 1550 if (vap->iv_state != IEEE80211_S_INIT) { 1551 /* NB: iv_newstate may drop the lock */ 1552 vap->iv_newstate(vap, IEEE80211_S_INIT, 0); 1553 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT; 1554 } 1555 } 1556 } 1557 1558 /* 1559 * Wakeup all vap's waiting for a scan to complete. This is the 1560 * companion to markwaiting (above) and is used to coordinate 1561 * multiple vaps scanning. 1562 * This is called from the state taskqueue. 1563 */ 1564 static void 1565 wakeupwaiting(struct ieee80211vap *vap0) 1566 { 1567 struct ieee80211com *ic = vap0->iv_ic; 1568 struct ieee80211vap *vap; 1569 1570 /* 1571 * A vap list entry can not disappear since we are running on the 1572 * taskqueue and a vap destroy will queue and drain another state 1573 * change task. 1574 */ 1575 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1576 if (vap == vap0) 1577 continue; 1578 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANWAIT) { 1579 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANWAIT; 1580 /* NB: sta's cannot go INIT->RUN */ 1581 /* NB: iv_newstate may drop the lock */ 1582 vap->iv_newstate(vap, 1583 vap->iv_opmode == IEEE80211_M_STA ? 1584 IEEE80211_S_SCAN : IEEE80211_S_RUN, 0); 1585 } 1586 } 1587 } 1588 1589 /* 1590 * Handle post state change work common to all operating modes. 1591 */ 1592 static void 1593 ieee80211_newstate_task(void *xvap, int npending) 1594 { 1595 struct ieee80211vap *vap = xvap; 1596 struct ieee80211com *ic; 1597 enum ieee80211_state nstate, ostate; 1598 int arg, rc; 1599 1600 wlan_serialize_enter(); 1601 1602 ic = vap->iv_ic; 1603 nstate = vap->iv_nstate; 1604 arg = vap->iv_nstate_arg; 1605 1606 if (vap->iv_flags_ext & IEEE80211_FEXT_REINIT) { 1607 /* 1608 * We have been requested to drop back to the INIT before 1609 * proceeding to the new state. 1610 */ 1611 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1612 "%s: %s -> %s arg %d\n", __func__, 1613 ieee80211_state_name[vap->iv_state], 1614 ieee80211_state_name[IEEE80211_S_INIT], arg); 1615 vap->iv_newstate(vap, IEEE80211_S_INIT, arg); 1616 vap->iv_flags_ext &= ~IEEE80211_FEXT_REINIT; 1617 } 1618 1619 ostate = vap->iv_state; 1620 if (nstate == IEEE80211_S_SCAN && ostate != IEEE80211_S_INIT) { 1621 /* 1622 * SCAN was forced; e.g. on beacon miss. Force other running 1623 * vap's to INIT state and mark them as waiting for the scan to 1624 * complete. This insures they don't interfere with our 1625 * scanning. Since we are single threaded the vaps can not 1626 * transition again while we are executing. 1627 * 1628 * XXX not always right, assumes ap follows sta 1629 */ 1630 markwaiting(vap); 1631 } 1632 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1633 "%s: %s -> %s arg %d\n", __func__, 1634 ieee80211_state_name[ostate], ieee80211_state_name[nstate], arg); 1635 1636 rc = vap->iv_newstate(vap, nstate, arg); 1637 vap->iv_flags_ext &= ~IEEE80211_FEXT_STATEWAIT; 1638 if (rc != 0) { 1639 /* State transition failed */ 1640 KASSERT(rc != EINPROGRESS, ("iv_newstate was deferred")); 1641 KASSERT(nstate != IEEE80211_S_INIT, 1642 ("INIT state change failed")); 1643 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1644 "%s: %s returned error %d\n", __func__, 1645 ieee80211_state_name[nstate], rc); 1646 goto done; 1647 } 1648 1649 /* No actual transition, skip post processing */ 1650 if (ostate == nstate) 1651 goto done; 1652 1653 if (nstate == IEEE80211_S_RUN) { 1654 /* 1655 * OACTIVE may be set on the vap if the upper layer 1656 * tried to transmit (e.g. IPv6 NDP) before we reach 1657 * RUN state. Clear it and restart xmit. 1658 * 1659 * Note this can also happen as a result of SLEEP->RUN 1660 * (i.e. coming out of power save mode). 1661 */ 1662 vap->iv_ifp->if_flags &= ~IFF_OACTIVE; 1663 vap->iv_ifp->if_start(vap->iv_ifp); 1664 1665 /* bring up any vaps waiting on us */ 1666 wakeupwaiting(vap); 1667 } else if (nstate == IEEE80211_S_INIT) { 1668 /* 1669 * Flush the scan cache if we did the last scan (XXX?) 1670 * and flush any frames on send queues from this vap. 1671 * Note the mgt q is used only for legacy drivers and 1672 * will go away shortly. 1673 */ 1674 ieee80211_scan_flush(vap); 1675 1676 /* XXX NB: cast for altq */ 1677 ieee80211_flush_ifq((struct ifqueue *)&ic->ic_ifp->if_snd, vap); 1678 } 1679 done: 1680 wlan_serialize_exit(); 1681 } 1682 1683 /* 1684 * Public interface for initiating a state machine change. 1685 * This routine single-threads the request and coordinates 1686 * the scheduling of multiple vaps for the purpose of selecting 1687 * an operating channel. Specifically the following scenarios 1688 * are handled: 1689 * o only one vap can be selecting a channel so on transition to 1690 * SCAN state if another vap is already scanning then 1691 * mark the caller for later processing and return without 1692 * doing anything (XXX? expectations by caller of synchronous operation) 1693 * o only one vap can be doing CAC of a channel so on transition to 1694 * CAC state if another vap is already scanning for radar then 1695 * mark the caller for later processing and return without 1696 * doing anything (XXX? expectations by caller of synchronous operation) 1697 * o if another vap is already running when a request is made 1698 * to SCAN then an operating channel has been chosen; bypass 1699 * the scan and just join the channel 1700 * 1701 * Note that the state change call is done through the iv_newstate 1702 * method pointer so any driver routine gets invoked. The driver 1703 * will normally call back into operating mode-specific 1704 * ieee80211_newstate routines (below) unless it needs to completely 1705 * bypass the state machine (e.g. because the firmware has it's 1706 * own idea how things should work). Bypassing the net80211 layer 1707 * is usually a mistake and indicates lack of proper integration 1708 * with the net80211 layer. 1709 */ 1710 static int 1711 ieee80211_new_state_locked(struct ieee80211vap *vap, 1712 enum ieee80211_state nstate, int arg) 1713 { 1714 struct ieee80211com *ic = vap->iv_ic; 1715 struct ieee80211vap *vp; 1716 enum ieee80211_state ostate; 1717 int nrunning, nscanning; 1718 1719 if (vap->iv_flags_ext & IEEE80211_FEXT_STATEWAIT) { 1720 if (vap->iv_nstate == IEEE80211_S_INIT) { 1721 /* 1722 * XXX The vap is being stopped, do no allow any other 1723 * state changes until this is completed. 1724 */ 1725 return -1; 1726 } else if (vap->iv_state != vap->iv_nstate) { 1727 #if 0 1728 /* Warn if the previous state hasn't completed. */ 1729 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1730 "%s: pending %s -> %s transition lost\n", __func__, 1731 ieee80211_state_name[vap->iv_state], 1732 ieee80211_state_name[vap->iv_nstate]); 1733 #else 1734 /* XXX temporarily enable to identify issues */ 1735 if_printf(vap->iv_ifp, 1736 "%s: pending %s -> %s transition lost\n", 1737 __func__, ieee80211_state_name[vap->iv_state], 1738 ieee80211_state_name[vap->iv_nstate]); 1739 #endif 1740 } 1741 } 1742 1743 nrunning = nscanning = 0; 1744 /* XXX can track this state instead of calculating */ 1745 TAILQ_FOREACH(vp, &ic->ic_vaps, iv_next) { 1746 if (vp != vap) { 1747 if (vp->iv_state >= IEEE80211_S_RUN) 1748 nrunning++; 1749 /* XXX doesn't handle bg scan */ 1750 /* NB: CAC+AUTH+ASSOC treated like SCAN */ 1751 else if (vp->iv_state > IEEE80211_S_INIT) 1752 nscanning++; 1753 } 1754 } 1755 ostate = vap->iv_state; 1756 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1757 "%s: %s -> %s (nrunning %d nscanning %d)\n", __func__, 1758 ieee80211_state_name[ostate], ieee80211_state_name[nstate], 1759 nrunning, nscanning); 1760 switch (nstate) { 1761 case IEEE80211_S_SCAN: 1762 if (ostate == IEEE80211_S_INIT) { 1763 /* 1764 * INIT -> SCAN happens on initial bringup. 1765 */ 1766 KASSERT(!(nscanning && nrunning), 1767 ("%d scanning and %d running", nscanning, nrunning)); 1768 if (nscanning) { 1769 /* 1770 * Someone is scanning, defer our state 1771 * change until the work has completed. 1772 */ 1773 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1774 "%s: defer %s -> %s\n", 1775 __func__, ieee80211_state_name[ostate], 1776 ieee80211_state_name[nstate]); 1777 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT; 1778 return 0; 1779 } 1780 if (nrunning) { 1781 /* 1782 * Someone is operating; just join the channel 1783 * they have chosen. 1784 */ 1785 /* XXX kill arg? */ 1786 /* XXX check each opmode, adhoc? */ 1787 if (vap->iv_opmode == IEEE80211_M_STA) 1788 nstate = IEEE80211_S_SCAN; 1789 else 1790 nstate = IEEE80211_S_RUN; 1791 #ifdef IEEE80211_DEBUG 1792 if (nstate != IEEE80211_S_SCAN) { 1793 IEEE80211_DPRINTF(vap, 1794 IEEE80211_MSG_STATE, 1795 "%s: override, now %s -> %s\n", 1796 __func__, 1797 ieee80211_state_name[ostate], 1798 ieee80211_state_name[nstate]); 1799 } 1800 #endif 1801 } 1802 } 1803 break; 1804 case IEEE80211_S_RUN: 1805 if (vap->iv_opmode == IEEE80211_M_WDS && 1806 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) && 1807 nscanning) { 1808 /* 1809 * Legacy WDS with someone else scanning; don't 1810 * go online until that completes as we should 1811 * follow the other vap to the channel they choose. 1812 */ 1813 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1814 "%s: defer %s -> %s (legacy WDS)\n", __func__, 1815 ieee80211_state_name[ostate], 1816 ieee80211_state_name[nstate]); 1817 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT; 1818 return 0; 1819 } 1820 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 1821 IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) && 1822 (vap->iv_flags_ext & IEEE80211_FEXT_DFS) && 1823 !IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) { 1824 /* 1825 * This is a DFS channel, transition to CAC state 1826 * instead of RUN. This allows us to initiate 1827 * Channel Availability Check (CAC) as specified 1828 * by 11h/DFS. 1829 */ 1830 nstate = IEEE80211_S_CAC; 1831 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1832 "%s: override %s -> %s (DFS)\n", __func__, 1833 ieee80211_state_name[ostate], 1834 ieee80211_state_name[nstate]); 1835 } 1836 break; 1837 case IEEE80211_S_INIT: 1838 /* cancel any scan in progress */ 1839 ieee80211_cancel_scan(vap); 1840 if (ostate == IEEE80211_S_INIT ) { 1841 /* XXX don't believe this */ 1842 /* INIT -> INIT. nothing to do */ 1843 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANWAIT; 1844 } 1845 /* fall thru... */ 1846 default: 1847 break; 1848 } 1849 /* defer the state change to a thread */ 1850 vap->iv_nstate = nstate; 1851 vap->iv_nstate_arg = arg; 1852 vap->iv_flags_ext |= IEEE80211_FEXT_STATEWAIT; 1853 ieee80211_runtask(ic, &vap->iv_nstate_task); 1854 return EINPROGRESS; 1855 } 1856 1857 int 1858 ieee80211_new_state(struct ieee80211vap *vap, 1859 enum ieee80211_state nstate, int arg) 1860 { 1861 struct ieee80211com *ic = vap->iv_ic; 1862 int rc; 1863 1864 ic = vap->iv_ic; 1865 rc = ieee80211_new_state_locked(vap, nstate, arg); 1866 return rc; 1867 } 1868