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 * $DragonFly$ 28 */ 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/route.h> 47 48 #include <netproto/802_11/ieee80211_var.h> 49 #include <netproto/802_11/ieee80211_adhoc.h> 50 #include <netproto/802_11/ieee80211_sta.h> 51 #include <netproto/802_11/ieee80211_hostap.h> 52 #include <netproto/802_11/ieee80211_wds.h> 53 #ifdef IEEE80211_SUPPORT_MESH 54 #include <netproto/802_11/ieee80211_mesh.h> 55 #endif 56 #include <netproto/802_11/ieee80211_monitor.h> 57 #include <netproto/802_11/ieee80211_input.h> 58 59 /* XXX tunables */ 60 #define AGGRESSIVE_MODE_SWITCH_HYSTERESIS 3 /* pkts / 100ms */ 61 #define HIGH_PRI_SWITCH_THRESH 10 /* pkts / 100ms */ 62 63 const char *ieee80211_mgt_subtype_name[] = { 64 "assoc_req", "assoc_resp", "reassoc_req", "reassoc_resp", 65 "probe_req", "probe_resp", "reserved#6", "reserved#7", 66 "beacon", "atim", "disassoc", "auth", 67 "deauth", "action", "reserved#14", "reserved#15" 68 }; 69 const char *ieee80211_ctl_subtype_name[] = { 70 "reserved#0", "reserved#1", "reserved#2", "reserved#3", 71 "reserved#3", "reserved#5", "reserved#6", "reserved#7", 72 "reserved#8", "reserved#9", "ps_poll", "rts", 73 "cts", "ack", "cf_end", "cf_end_ack" 74 }; 75 const char *ieee80211_opmode_name[IEEE80211_OPMODE_MAX] = { 76 "IBSS", /* IEEE80211_M_IBSS */ 77 "STA", /* IEEE80211_M_STA */ 78 "WDS", /* IEEE80211_M_WDS */ 79 "AHDEMO", /* IEEE80211_M_AHDEMO */ 80 "HOSTAP", /* IEEE80211_M_HOSTAP */ 81 "MONITOR", /* IEEE80211_M_MONITOR */ 82 "MBSS" /* IEEE80211_M_MBSS */ 83 }; 84 const char *ieee80211_state_name[IEEE80211_S_MAX] = { 85 "INIT", /* IEEE80211_S_INIT */ 86 "SCAN", /* IEEE80211_S_SCAN */ 87 "AUTH", /* IEEE80211_S_AUTH */ 88 "ASSOC", /* IEEE80211_S_ASSOC */ 89 "CAC", /* IEEE80211_S_CAC */ 90 "RUN", /* IEEE80211_S_RUN */ 91 "CSA", /* IEEE80211_S_CSA */ 92 "SLEEP", /* IEEE80211_S_SLEEP */ 93 }; 94 const char *ieee80211_wme_acnames[] = { 95 "WME_AC_BE", 96 "WME_AC_BK", 97 "WME_AC_VI", 98 "WME_AC_VO", 99 "WME_UPSD", 100 }; 101 102 static void beacon_miss(void *, int); 103 static void beacon_swmiss(void *, int); 104 static void parent_updown(void *, int); 105 static void update_mcast(void *, int); 106 static void update_promisc(void *, int); 107 static void update_channel(void *, int); 108 static void ieee80211_newstate_cb(void *, int); 109 static int ieee80211_new_state_locked(struct ieee80211vap *, 110 enum ieee80211_state, int); 111 112 static int 113 null_raw_xmit(struct ieee80211_node *ni, struct mbuf *m, 114 const struct ieee80211_bpf_params *params) 115 { 116 struct ifnet *ifp = ni->ni_ic->ic_ifp; 117 118 if_printf(ifp, "missing ic_raw_xmit callback, drop frame\n"); 119 m_freem(m); 120 return ENETDOWN; 121 } 122 123 void 124 ieee80211_proto_attach(struct ieee80211com *ic) 125 { 126 struct ifnet *ifp = ic->ic_ifp; 127 128 /* override the 802.3 setting */ 129 ifp->if_hdrlen = ic->ic_headroom 130 + sizeof(struct ieee80211_qosframe_addr4) 131 + IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN 132 + IEEE80211_WEP_EXTIVLEN; 133 /* XXX no way to recalculate on ifdetach */ 134 if (ALIGN(ifp->if_hdrlen) > max_linkhdr) { 135 /* XXX sanity check... */ 136 max_linkhdr = ALIGN(ifp->if_hdrlen); 137 max_hdr = max_linkhdr + max_protohdr; 138 max_datalen = MHLEN - max_hdr; 139 } 140 ic->ic_protmode = IEEE80211_PROT_CTSONLY; 141 142 TASK_INIT(&ic->ic_parent_task, 0, parent_updown, ifp); 143 TASK_INIT(&ic->ic_mcast_task, 0, update_mcast, ic); 144 TASK_INIT(&ic->ic_promisc_task, 0, update_promisc, ic); 145 TASK_INIT(&ic->ic_chan_task, 0, update_channel, ic); 146 TASK_INIT(&ic->ic_bmiss_task, 0, beacon_miss, ic); 147 148 ic->ic_wme.wme_hipri_switch_hysteresis = 149 AGGRESSIVE_MODE_SWITCH_HYSTERESIS; 150 151 /* initialize management frame handlers */ 152 ic->ic_send_mgmt = ieee80211_send_mgmt; 153 ic->ic_raw_xmit = null_raw_xmit; 154 155 ieee80211_adhoc_attach(ic); 156 ieee80211_sta_attach(ic); 157 ieee80211_wds_attach(ic); 158 ieee80211_hostap_attach(ic); 159 #ifdef IEEE80211_SUPPORT_MESH 160 ieee80211_mesh_attach(ic); 161 #endif 162 ieee80211_monitor_attach(ic); 163 } 164 165 void 166 ieee80211_proto_detach(struct ieee80211com *ic) 167 { 168 ieee80211_monitor_detach(ic); 169 #ifdef IEEE80211_SUPPORT_MESH 170 ieee80211_mesh_detach(ic); 171 #endif 172 ieee80211_hostap_detach(ic); 173 ieee80211_wds_detach(ic); 174 ieee80211_adhoc_detach(ic); 175 ieee80211_sta_detach(ic); 176 } 177 178 static void 179 null_update_beacon(struct ieee80211vap *vap, int item) 180 { 181 } 182 183 void 184 ieee80211_proto_vattach(struct ieee80211vap *vap) 185 { 186 struct ieee80211com *ic = vap->iv_ic; 187 struct ifnet *ifp = vap->iv_ifp; 188 int i; 189 190 /* override the 802.3 setting */ 191 ifp->if_hdrlen = ic->ic_ifp->if_hdrlen; 192 193 vap->iv_rtsthreshold = IEEE80211_RTS_DEFAULT; 194 vap->iv_fragthreshold = IEEE80211_FRAG_DEFAULT; 195 vap->iv_bmiss_max = IEEE80211_BMISS_MAX; 196 callout_init_mp(&vap->iv_swbmiss); 197 callout_init_mp(&vap->iv_mgtsend); 198 TASK_INIT(&vap->iv_nstate_task, 0, ieee80211_newstate_cb, vap); 199 TASK_INIT(&vap->iv_swbmiss_task, 0, beacon_swmiss, vap); 200 /* 201 * Install default tx rate handling: no fixed rate, lowest 202 * supported rate for mgmt and multicast frames. Default 203 * max retry count. These settings can be changed by the 204 * driver and/or user applications. 205 */ 206 for (i = IEEE80211_MODE_11A; i < IEEE80211_MODE_MAX; i++) { 207 const struct ieee80211_rateset *rs = &ic->ic_sup_rates[i]; 208 209 vap->iv_txparms[i].ucastrate = IEEE80211_FIXED_RATE_NONE; 210 if (i == IEEE80211_MODE_11NA || i == IEEE80211_MODE_11NG) { 211 vap->iv_txparms[i].mgmtrate = 0 | IEEE80211_RATE_MCS; 212 vap->iv_txparms[i].mcastrate = 0 | IEEE80211_RATE_MCS; 213 } else { 214 vap->iv_txparms[i].mgmtrate = 215 rs->rs_rates[0] & IEEE80211_RATE_VAL; 216 vap->iv_txparms[i].mcastrate = 217 rs->rs_rates[0] & IEEE80211_RATE_VAL; 218 } 219 vap->iv_txparms[i].maxretry = IEEE80211_TXMAX_DEFAULT; 220 } 221 vap->iv_roaming = IEEE80211_ROAMING_AUTO; 222 223 vap->iv_update_beacon = null_update_beacon; 224 vap->iv_deliver_data = ieee80211_deliver_data; 225 226 /* attach support for operating mode */ 227 ic->ic_vattach[vap->iv_opmode](vap); 228 } 229 230 void 231 ieee80211_proto_vdetach(struct ieee80211vap *vap) 232 { 233 #define FREEAPPIE(ie) do { \ 234 if (ie != NULL) \ 235 kfree(ie, M_80211_NODE_IE); \ 236 } while (0) 237 /* 238 * Detach operating mode module. 239 */ 240 if (vap->iv_opdetach != NULL) 241 vap->iv_opdetach(vap); 242 /* 243 * This should not be needed as we detach when reseting 244 * the state but be conservative here since the 245 * authenticator may do things like spawn kernel threads. 246 */ 247 if (vap->iv_auth->ia_detach != NULL) 248 vap->iv_auth->ia_detach(vap); 249 /* 250 * Detach any ACL'ator. 251 */ 252 if (vap->iv_acl != NULL) 253 vap->iv_acl->iac_detach(vap); 254 255 FREEAPPIE(vap->iv_appie_beacon); 256 FREEAPPIE(vap->iv_appie_probereq); 257 FREEAPPIE(vap->iv_appie_proberesp); 258 FREEAPPIE(vap->iv_appie_assocreq); 259 FREEAPPIE(vap->iv_appie_assocresp); 260 FREEAPPIE(vap->iv_appie_wpa); 261 #undef FREEAPPIE 262 } 263 264 /* 265 * Simple-minded authenticator module support. 266 */ 267 268 #define IEEE80211_AUTH_MAX (IEEE80211_AUTH_WPA+1) 269 /* XXX well-known names */ 270 static const char *auth_modnames[IEEE80211_AUTH_MAX] = { 271 "wlan_internal", /* IEEE80211_AUTH_NONE */ 272 "wlan_internal", /* IEEE80211_AUTH_OPEN */ 273 "wlan_internal", /* IEEE80211_AUTH_SHARED */ 274 "wlan_xauth", /* IEEE80211_AUTH_8021X */ 275 "wlan_internal", /* IEEE80211_AUTH_AUTO */ 276 "wlan_xauth", /* IEEE80211_AUTH_WPA */ 277 }; 278 static const struct ieee80211_authenticator *authenticators[IEEE80211_AUTH_MAX]; 279 280 static const struct ieee80211_authenticator auth_internal = { 281 .ia_name = "wlan_internal", 282 .ia_attach = NULL, 283 .ia_detach = NULL, 284 .ia_node_join = NULL, 285 .ia_node_leave = NULL, 286 }; 287 288 /* 289 * Setup internal authenticators once; they are never unregistered. 290 */ 291 static void 292 ieee80211_auth_setup(void) 293 { 294 ieee80211_authenticator_register(IEEE80211_AUTH_OPEN, &auth_internal); 295 ieee80211_authenticator_register(IEEE80211_AUTH_SHARED, &auth_internal); 296 ieee80211_authenticator_register(IEEE80211_AUTH_AUTO, &auth_internal); 297 } 298 SYSINIT(wlan_auth, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_auth_setup, NULL); 299 300 const struct ieee80211_authenticator * 301 ieee80211_authenticator_get(int auth) 302 { 303 if (auth >= IEEE80211_AUTH_MAX) 304 return NULL; 305 if (authenticators[auth] == NULL) 306 ieee80211_load_module(auth_modnames[auth]); 307 return authenticators[auth]; 308 } 309 310 void 311 ieee80211_authenticator_register(int type, 312 const struct ieee80211_authenticator *auth) 313 { 314 if (type >= IEEE80211_AUTH_MAX) 315 return; 316 authenticators[type] = auth; 317 } 318 319 void 320 ieee80211_authenticator_unregister(int type) 321 { 322 323 if (type >= IEEE80211_AUTH_MAX) 324 return; 325 authenticators[type] = NULL; 326 } 327 328 /* 329 * Very simple-minded ACL module support. 330 */ 331 /* XXX just one for now */ 332 static const struct ieee80211_aclator *acl = NULL; 333 334 void 335 ieee80211_aclator_register(const struct ieee80211_aclator *iac) 336 { 337 kprintf("wlan: %s acl policy registered\n", iac->iac_name); 338 acl = iac; 339 } 340 341 void 342 ieee80211_aclator_unregister(const struct ieee80211_aclator *iac) 343 { 344 if (acl == iac) 345 acl = NULL; 346 kprintf("wlan: %s acl policy unregistered\n", iac->iac_name); 347 } 348 349 const struct ieee80211_aclator * 350 ieee80211_aclator_get(const char *name) 351 { 352 if (acl == NULL) 353 ieee80211_load_module("wlan_acl"); 354 return acl != NULL && strcmp(acl->iac_name, name) == 0 ? acl : NULL; 355 } 356 357 void 358 ieee80211_print_essid(const uint8_t *essid, int len) 359 { 360 const uint8_t *p; 361 int i; 362 363 if (len > IEEE80211_NWID_LEN) 364 len = IEEE80211_NWID_LEN; 365 /* determine printable or not */ 366 for (i = 0, p = essid; i < len; i++, p++) { 367 if (*p < ' ' || *p > 0x7e) 368 break; 369 } 370 if (i == len) { 371 kprintf("\""); 372 for (i = 0, p = essid; i < len; i++, p++) 373 kprintf("%c", *p); 374 kprintf("\""); 375 } else { 376 kprintf("0x"); 377 for (i = 0, p = essid; i < len; i++, p++) 378 kprintf("%02x", *p); 379 } 380 } 381 382 void 383 ieee80211_dump_pkt(struct ieee80211com *ic, 384 const uint8_t *buf, int len, int rate, int rssi) 385 { 386 const struct ieee80211_frame *wh; 387 int i; 388 389 wh = (const struct ieee80211_frame *)buf; 390 switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) { 391 case IEEE80211_FC1_DIR_NODS: 392 kprintf("NODS %6D", wh->i_addr2, ":"); 393 kprintf("->%6D", wh->i_addr1, ":"); 394 kprintf("(%6D)", wh->i_addr3, ":"); 395 break; 396 case IEEE80211_FC1_DIR_TODS: 397 kprintf("TODS %6D", wh->i_addr2, ":"); 398 kprintf("->%6D", wh->i_addr3, ":"); 399 kprintf("(%6D)", wh->i_addr1, ":"); 400 break; 401 case IEEE80211_FC1_DIR_FROMDS: 402 kprintf("FRDS %6D", wh->i_addr3, ":"); 403 kprintf("->%6D", wh->i_addr1, ":"); 404 kprintf("(%6D)", wh->i_addr2, ":"); 405 break; 406 case IEEE80211_FC1_DIR_DSTODS: 407 kprintf("DSDS %6D", (const uint8_t *)&wh[1], ":"); 408 kprintf("->%6D", wh->i_addr3, ":"); 409 kprintf("(%6D", wh->i_addr2, ":"); 410 kprintf("->%6D)", wh->i_addr1, ":"); 411 break; 412 } 413 switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) { 414 case IEEE80211_FC0_TYPE_DATA: 415 kprintf(" data"); 416 break; 417 case IEEE80211_FC0_TYPE_MGT: 418 kprintf(" %s", ieee80211_mgt_subtype_name[ 419 (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) 420 >> IEEE80211_FC0_SUBTYPE_SHIFT]); 421 break; 422 default: 423 kprintf(" type#%d", wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK); 424 break; 425 } 426 if (IEEE80211_QOS_HAS_SEQ(wh)) { 427 const struct ieee80211_qosframe *qwh = 428 (const struct ieee80211_qosframe *)buf; 429 kprintf(" QoS [TID %u%s]", qwh->i_qos[0] & IEEE80211_QOS_TID, 430 qwh->i_qos[0] & IEEE80211_QOS_ACKPOLICY ? " ACM" : ""); 431 } 432 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 433 int off; 434 435 off = ieee80211_anyhdrspace(ic, wh); 436 kprintf(" WEP [IV %.02x %.02x %.02x", 437 buf[off+0], buf[off+1], buf[off+2]); 438 if (buf[off+IEEE80211_WEP_IVLEN] & IEEE80211_WEP_EXTIV) 439 kprintf(" %.02x %.02x %.02x", 440 buf[off+4], buf[off+5], buf[off+6]); 441 kprintf(" KID %u]", buf[off+IEEE80211_WEP_IVLEN] >> 6); 442 } 443 if (rate >= 0) 444 kprintf(" %dM", rate / 2); 445 if (rssi >= 0) 446 kprintf(" +%d", rssi); 447 kprintf("\n"); 448 if (len > 0) { 449 for (i = 0; i < len; i++) { 450 if ((i & 1) == 0) 451 kprintf(" "); 452 kprintf("%02x", buf[i]); 453 } 454 kprintf("\n"); 455 } 456 } 457 458 static __inline int 459 findrix(const struct ieee80211_rateset *rs, int r) 460 { 461 int i; 462 463 for (i = 0; i < rs->rs_nrates; i++) 464 if ((rs->rs_rates[i] & IEEE80211_RATE_VAL) == r) 465 return i; 466 return -1; 467 } 468 469 int 470 ieee80211_fix_rate(struct ieee80211_node *ni, 471 struct ieee80211_rateset *nrs, int flags) 472 { 473 #define RV(v) ((v) & IEEE80211_RATE_VAL) 474 struct ieee80211vap *vap = ni->ni_vap; 475 struct ieee80211com *ic = ni->ni_ic; 476 int i, j, rix, error; 477 int okrate, badrate, fixedrate, ucastrate; 478 const struct ieee80211_rateset *srs; 479 uint8_t r; 480 481 error = 0; 482 okrate = badrate = 0; 483 ucastrate = vap->iv_txparms[ieee80211_chan2mode(ni->ni_chan)].ucastrate; 484 if (ucastrate != IEEE80211_FIXED_RATE_NONE) { 485 /* 486 * Workaround awkwardness with fixed rate. We are called 487 * to check both the legacy rate set and the HT rate set 488 * but we must apply any legacy fixed rate check only to the 489 * legacy rate set and vice versa. We cannot tell what type 490 * of rate set we've been given (legacy or HT) but we can 491 * distinguish the fixed rate type (MCS have 0x80 set). 492 * So to deal with this the caller communicates whether to 493 * check MCS or legacy rate using the flags and we use the 494 * type of any fixed rate to avoid applying an MCS to a 495 * legacy rate and vice versa. 496 */ 497 if (ucastrate & 0x80) { 498 if (flags & IEEE80211_F_DOFRATE) 499 flags &= ~IEEE80211_F_DOFRATE; 500 } else if ((ucastrate & 0x80) == 0) { 501 if (flags & IEEE80211_F_DOFMCS) 502 flags &= ~IEEE80211_F_DOFMCS; 503 } 504 /* NB: required to make MCS match below work */ 505 ucastrate &= IEEE80211_RATE_VAL; 506 } 507 fixedrate = IEEE80211_FIXED_RATE_NONE; 508 /* 509 * XXX we are called to process both MCS and legacy rates; 510 * we must use the appropriate basic rate set or chaos will 511 * ensue; for now callers that want MCS must supply 512 * IEEE80211_F_DOBRS; at some point we'll need to split this 513 * function so there are two variants, one for MCS and one 514 * for legacy rates. 515 */ 516 if (flags & IEEE80211_F_DOBRS) 517 srs = (const struct ieee80211_rateset *) 518 ieee80211_get_suphtrates(ic, ni->ni_chan); 519 else 520 srs = ieee80211_get_suprates(ic, ni->ni_chan); 521 for (i = 0; i < nrs->rs_nrates; ) { 522 if (flags & IEEE80211_F_DOSORT) { 523 /* 524 * Sort rates. 525 */ 526 for (j = i + 1; j < nrs->rs_nrates; j++) { 527 if (RV(nrs->rs_rates[i]) > RV(nrs->rs_rates[j])) { 528 r = nrs->rs_rates[i]; 529 nrs->rs_rates[i] = nrs->rs_rates[j]; 530 nrs->rs_rates[j] = r; 531 } 532 } 533 } 534 r = nrs->rs_rates[i] & IEEE80211_RATE_VAL; 535 badrate = r; 536 /* 537 * Check for fixed rate. 538 */ 539 if (r == ucastrate) 540 fixedrate = r; 541 /* 542 * Check against supported rates. 543 */ 544 rix = findrix(srs, r); 545 if (flags & IEEE80211_F_DONEGO) { 546 if (rix < 0) { 547 /* 548 * A rate in the node's rate set is not 549 * supported. If this is a basic rate and we 550 * are operating as a STA then this is an error. 551 * Otherwise we just discard/ignore the rate. 552 */ 553 if ((flags & IEEE80211_F_JOIN) && 554 (nrs->rs_rates[i] & IEEE80211_RATE_BASIC)) 555 error++; 556 } else if ((flags & IEEE80211_F_JOIN) == 0) { 557 /* 558 * Overwrite with the supported rate 559 * value so any basic rate bit is set. 560 */ 561 nrs->rs_rates[i] = srs->rs_rates[rix]; 562 } 563 } 564 if ((flags & IEEE80211_F_DODEL) && rix < 0) { 565 /* 566 * Delete unacceptable rates. 567 */ 568 nrs->rs_nrates--; 569 for (j = i; j < nrs->rs_nrates; j++) 570 nrs->rs_rates[j] = nrs->rs_rates[j + 1]; 571 nrs->rs_rates[j] = 0; 572 continue; 573 } 574 if (rix >= 0) 575 okrate = nrs->rs_rates[i]; 576 i++; 577 } 578 if (okrate == 0 || error != 0 || 579 ((flags & (IEEE80211_F_DOFRATE|IEEE80211_F_DOFMCS)) && 580 fixedrate != ucastrate)) { 581 IEEE80211_NOTE(vap, IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni, 582 "%s: flags 0x%x okrate %d error %d fixedrate 0x%x " 583 "ucastrate %x\n", __func__, fixedrate, ucastrate, flags); 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 #define N(a) (sizeof(a) / sizeof(a[0])) 646 static const int rates[] = { 2, 4, 11, 22, 12, 24, 48 }; 647 int i, j; 648 649 if (rs->rs_nrates < N(rates)) 650 return 0; 651 for (i = 0; i < N(rates); i++) { 652 for (j = 0; j < rs->rs_nrates; j++) { 653 int r = rs->rs_rates[j] & IEEE80211_RATE_VAL; 654 if (rates[i] == r) 655 goto next; 656 if (r > rates[i]) 657 return 0; 658 } 659 return 0; 660 next: 661 ; 662 } 663 return 1; 664 #undef N 665 } 666 667 /* 668 * Mark the basic rates for the rate table based on the 669 * operating mode. For real 11g we mark all the 11b rates 670 * and 6, 12, and 24 OFDM. For 11b compatibility we mark only 671 * 11b rates. There's also a pseudo 11a-mode used to mark only 672 * the basic OFDM rates. 673 */ 674 static void 675 setbasicrates(struct ieee80211_rateset *rs, 676 enum ieee80211_phymode mode, int add) 677 { 678 static const struct ieee80211_rateset basic[IEEE80211_MODE_MAX] = { 679 [IEEE80211_MODE_11A] = { 3, { 12, 24, 48 } }, 680 [IEEE80211_MODE_11B] = { 2, { 2, 4 } }, 681 /* NB: mixed b/g */ 682 [IEEE80211_MODE_11G] = { 4, { 2, 4, 11, 22 } }, 683 [IEEE80211_MODE_TURBO_A] = { 3, { 12, 24, 48 } }, 684 [IEEE80211_MODE_TURBO_G] = { 4, { 2, 4, 11, 22 } }, 685 [IEEE80211_MODE_STURBO_A] = { 3, { 12, 24, 48 } }, 686 [IEEE80211_MODE_HALF] = { 3, { 6, 12, 24 } }, 687 [IEEE80211_MODE_QUARTER] = { 3, { 3, 6, 12 } }, 688 [IEEE80211_MODE_11NA] = { 3, { 12, 24, 48 } }, 689 /* NB: mixed b/g */ 690 [IEEE80211_MODE_11NG] = { 4, { 2, 4, 11, 22 } }, 691 }; 692 int i, j; 693 694 for (i = 0; i < rs->rs_nrates; i++) { 695 if (!add) 696 rs->rs_rates[i] &= IEEE80211_RATE_VAL; 697 for (j = 0; j < basic[mode].rs_nrates; j++) 698 if (basic[mode].rs_rates[j] == rs->rs_rates[i]) { 699 rs->rs_rates[i] |= IEEE80211_RATE_BASIC; 700 break; 701 } 702 } 703 } 704 705 /* 706 * Set the basic rates in a rate set. 707 */ 708 void 709 ieee80211_setbasicrates(struct ieee80211_rateset *rs, 710 enum ieee80211_phymode mode) 711 { 712 setbasicrates(rs, mode, 0); 713 } 714 715 /* 716 * Add basic rates to a rate set. 717 */ 718 void 719 ieee80211_addbasicrates(struct ieee80211_rateset *rs, 720 enum ieee80211_phymode mode) 721 { 722 setbasicrates(rs, mode, 1); 723 } 724 725 /* 726 * WME protocol support. 727 * 728 * The default 11a/b/g/n parameters come from the WiFi Alliance WMM 729 * System Interopability Test Plan (v1.4, Appendix F) and the 802.11n 730 * Draft 2.0 Test Plan (Appendix D). 731 * 732 * Static/Dynamic Turbo mode settings come from Atheros. 733 */ 734 typedef struct phyParamType { 735 uint8_t aifsn; 736 uint8_t logcwmin; 737 uint8_t logcwmax; 738 uint16_t txopLimit; 739 uint8_t acm; 740 } paramType; 741 742 static const struct phyParamType phyParamForAC_BE[IEEE80211_MODE_MAX] = { 743 [IEEE80211_MODE_AUTO] = { 3, 4, 6, 0, 0 }, 744 [IEEE80211_MODE_11A] = { 3, 4, 6, 0, 0 }, 745 [IEEE80211_MODE_11B] = { 3, 4, 6, 0, 0 }, 746 [IEEE80211_MODE_11G] = { 3, 4, 6, 0, 0 }, 747 [IEEE80211_MODE_FH] = { 3, 4, 6, 0, 0 }, 748 [IEEE80211_MODE_TURBO_A]= { 2, 3, 5, 0, 0 }, 749 [IEEE80211_MODE_TURBO_G]= { 2, 3, 5, 0, 0 }, 750 [IEEE80211_MODE_STURBO_A]={ 2, 3, 5, 0, 0 }, 751 [IEEE80211_MODE_HALF] = { 3, 4, 6, 0, 0 }, 752 [IEEE80211_MODE_QUARTER]= { 3, 4, 6, 0, 0 }, 753 [IEEE80211_MODE_11NA] = { 3, 4, 6, 0, 0 }, 754 [IEEE80211_MODE_11NG] = { 3, 4, 6, 0, 0 }, 755 }; 756 static const struct phyParamType phyParamForAC_BK[IEEE80211_MODE_MAX] = { 757 [IEEE80211_MODE_AUTO] = { 7, 4, 10, 0, 0 }, 758 [IEEE80211_MODE_11A] = { 7, 4, 10, 0, 0 }, 759 [IEEE80211_MODE_11B] = { 7, 4, 10, 0, 0 }, 760 [IEEE80211_MODE_11G] = { 7, 4, 10, 0, 0 }, 761 [IEEE80211_MODE_FH] = { 7, 4, 10, 0, 0 }, 762 [IEEE80211_MODE_TURBO_A]= { 7, 3, 10, 0, 0 }, 763 [IEEE80211_MODE_TURBO_G]= { 7, 3, 10, 0, 0 }, 764 [IEEE80211_MODE_STURBO_A]={ 7, 3, 10, 0, 0 }, 765 [IEEE80211_MODE_HALF] = { 7, 4, 10, 0, 0 }, 766 [IEEE80211_MODE_QUARTER]= { 7, 4, 10, 0, 0 }, 767 [IEEE80211_MODE_11NA] = { 7, 4, 10, 0, 0 }, 768 [IEEE80211_MODE_11NG] = { 7, 4, 10, 0, 0 }, 769 }; 770 static const struct phyParamType phyParamForAC_VI[IEEE80211_MODE_MAX] = { 771 [IEEE80211_MODE_AUTO] = { 1, 3, 4, 94, 0 }, 772 [IEEE80211_MODE_11A] = { 1, 3, 4, 94, 0 }, 773 [IEEE80211_MODE_11B] = { 1, 3, 4, 188, 0 }, 774 [IEEE80211_MODE_11G] = { 1, 3, 4, 94, 0 }, 775 [IEEE80211_MODE_FH] = { 1, 3, 4, 188, 0 }, 776 [IEEE80211_MODE_TURBO_A]= { 1, 2, 3, 94, 0 }, 777 [IEEE80211_MODE_TURBO_G]= { 1, 2, 3, 94, 0 }, 778 [IEEE80211_MODE_STURBO_A]={ 1, 2, 3, 94, 0 }, 779 [IEEE80211_MODE_HALF] = { 1, 3, 4, 94, 0 }, 780 [IEEE80211_MODE_QUARTER]= { 1, 3, 4, 94, 0 }, 781 [IEEE80211_MODE_11NA] = { 1, 3, 4, 94, 0 }, 782 [IEEE80211_MODE_11NG] = { 1, 3, 4, 94, 0 }, 783 }; 784 static const struct phyParamType phyParamForAC_VO[IEEE80211_MODE_MAX] = { 785 [IEEE80211_MODE_AUTO] = { 1, 2, 3, 47, 0 }, 786 [IEEE80211_MODE_11A] = { 1, 2, 3, 47, 0 }, 787 [IEEE80211_MODE_11B] = { 1, 2, 3, 102, 0 }, 788 [IEEE80211_MODE_11G] = { 1, 2, 3, 47, 0 }, 789 [IEEE80211_MODE_FH] = { 1, 2, 3, 102, 0 }, 790 [IEEE80211_MODE_TURBO_A]= { 1, 2, 2, 47, 0 }, 791 [IEEE80211_MODE_TURBO_G]= { 1, 2, 2, 47, 0 }, 792 [IEEE80211_MODE_STURBO_A]={ 1, 2, 2, 47, 0 }, 793 [IEEE80211_MODE_HALF] = { 1, 2, 3, 47, 0 }, 794 [IEEE80211_MODE_QUARTER]= { 1, 2, 3, 47, 0 }, 795 [IEEE80211_MODE_11NA] = { 1, 2, 3, 47, 0 }, 796 [IEEE80211_MODE_11NG] = { 1, 2, 3, 47, 0 }, 797 }; 798 799 static const struct phyParamType bssPhyParamForAC_BE[IEEE80211_MODE_MAX] = { 800 [IEEE80211_MODE_AUTO] = { 3, 4, 10, 0, 0 }, 801 [IEEE80211_MODE_11A] = { 3, 4, 10, 0, 0 }, 802 [IEEE80211_MODE_11B] = { 3, 4, 10, 0, 0 }, 803 [IEEE80211_MODE_11G] = { 3, 4, 10, 0, 0 }, 804 [IEEE80211_MODE_FH] = { 3, 4, 10, 0, 0 }, 805 [IEEE80211_MODE_TURBO_A]= { 2, 3, 10, 0, 0 }, 806 [IEEE80211_MODE_TURBO_G]= { 2, 3, 10, 0, 0 }, 807 [IEEE80211_MODE_STURBO_A]={ 2, 3, 10, 0, 0 }, 808 [IEEE80211_MODE_HALF] = { 3, 4, 10, 0, 0 }, 809 [IEEE80211_MODE_QUARTER]= { 3, 4, 10, 0, 0 }, 810 [IEEE80211_MODE_11NA] = { 3, 4, 10, 0, 0 }, 811 [IEEE80211_MODE_11NG] = { 3, 4, 10, 0, 0 }, 812 }; 813 static const struct phyParamType bssPhyParamForAC_VI[IEEE80211_MODE_MAX] = { 814 [IEEE80211_MODE_AUTO] = { 2, 3, 4, 94, 0 }, 815 [IEEE80211_MODE_11A] = { 2, 3, 4, 94, 0 }, 816 [IEEE80211_MODE_11B] = { 2, 3, 4, 188, 0 }, 817 [IEEE80211_MODE_11G] = { 2, 3, 4, 94, 0 }, 818 [IEEE80211_MODE_FH] = { 2, 3, 4, 188, 0 }, 819 [IEEE80211_MODE_TURBO_A]= { 2, 2, 3, 94, 0 }, 820 [IEEE80211_MODE_TURBO_G]= { 2, 2, 3, 94, 0 }, 821 [IEEE80211_MODE_STURBO_A]={ 2, 2, 3, 94, 0 }, 822 [IEEE80211_MODE_HALF] = { 2, 3, 4, 94, 0 }, 823 [IEEE80211_MODE_QUARTER]= { 2, 3, 4, 94, 0 }, 824 [IEEE80211_MODE_11NA] = { 2, 3, 4, 94, 0 }, 825 [IEEE80211_MODE_11NG] = { 2, 3, 4, 94, 0 }, 826 }; 827 static const struct phyParamType bssPhyParamForAC_VO[IEEE80211_MODE_MAX] = { 828 [IEEE80211_MODE_AUTO] = { 2, 2, 3, 47, 0 }, 829 [IEEE80211_MODE_11A] = { 2, 2, 3, 47, 0 }, 830 [IEEE80211_MODE_11B] = { 2, 2, 3, 102, 0 }, 831 [IEEE80211_MODE_11G] = { 2, 2, 3, 47, 0 }, 832 [IEEE80211_MODE_FH] = { 2, 2, 3, 102, 0 }, 833 [IEEE80211_MODE_TURBO_A]= { 1, 2, 2, 47, 0 }, 834 [IEEE80211_MODE_TURBO_G]= { 1, 2, 2, 47, 0 }, 835 [IEEE80211_MODE_STURBO_A]={ 1, 2, 2, 47, 0 }, 836 [IEEE80211_MODE_HALF] = { 2, 2, 3, 47, 0 }, 837 [IEEE80211_MODE_QUARTER]= { 2, 2, 3, 47, 0 }, 838 [IEEE80211_MODE_11NA] = { 2, 2, 3, 47, 0 }, 839 [IEEE80211_MODE_11NG] = { 2, 2, 3, 47, 0 }, 840 }; 841 842 static void 843 _setifsparams(struct wmeParams *wmep, const paramType *phy) 844 { 845 wmep->wmep_aifsn = phy->aifsn; 846 wmep->wmep_logcwmin = phy->logcwmin; 847 wmep->wmep_logcwmax = phy->logcwmax; 848 wmep->wmep_txopLimit = phy->txopLimit; 849 } 850 851 static void 852 setwmeparams(struct ieee80211vap *vap, const char *type, int ac, 853 struct wmeParams *wmep, const paramType *phy) 854 { 855 wmep->wmep_acm = phy->acm; 856 _setifsparams(wmep, phy); 857 858 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 859 "set %s (%s) [acm %u aifsn %u logcwmin %u logcwmax %u txop %u]\n", 860 ieee80211_wme_acnames[ac], type, 861 wmep->wmep_acm, wmep->wmep_aifsn, wmep->wmep_logcwmin, 862 wmep->wmep_logcwmax, wmep->wmep_txopLimit); 863 } 864 865 static void 866 ieee80211_wme_initparams_locked(struct ieee80211vap *vap) 867 { 868 struct ieee80211com *ic = vap->iv_ic; 869 struct ieee80211_wme_state *wme = &ic->ic_wme; 870 const paramType *pPhyParam, *pBssPhyParam; 871 struct wmeParams *wmep; 872 enum ieee80211_phymode mode; 873 int i; 874 875 IEEE80211_LOCK_ASSERT(ic); 876 877 if ((ic->ic_caps & IEEE80211_C_WME) == 0 || ic->ic_nrunning > 1) 878 return; 879 880 /* 881 * Select mode; we can be called early in which case we 882 * always use auto mode. We know we'll be called when 883 * entering the RUN state with bsschan setup properly 884 * so state will eventually get set correctly 885 */ 886 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC) 887 mode = ieee80211_chan2mode(ic->ic_bsschan); 888 else 889 mode = IEEE80211_MODE_AUTO; 890 for (i = 0; i < WME_NUM_AC; i++) { 891 switch (i) { 892 case WME_AC_BK: 893 pPhyParam = &phyParamForAC_BK[mode]; 894 pBssPhyParam = &phyParamForAC_BK[mode]; 895 break; 896 case WME_AC_VI: 897 pPhyParam = &phyParamForAC_VI[mode]; 898 pBssPhyParam = &bssPhyParamForAC_VI[mode]; 899 break; 900 case WME_AC_VO: 901 pPhyParam = &phyParamForAC_VO[mode]; 902 pBssPhyParam = &bssPhyParamForAC_VO[mode]; 903 break; 904 case WME_AC_BE: 905 default: 906 pPhyParam = &phyParamForAC_BE[mode]; 907 pBssPhyParam = &bssPhyParamForAC_BE[mode]; 908 break; 909 } 910 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i]; 911 if (ic->ic_opmode == IEEE80211_M_HOSTAP) { 912 setwmeparams(vap, "chan", i, wmep, pPhyParam); 913 } else { 914 setwmeparams(vap, "chan", i, wmep, pBssPhyParam); 915 } 916 wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i]; 917 setwmeparams(vap, "bss ", i, wmep, pBssPhyParam); 918 } 919 /* NB: check ic_bss to avoid NULL deref on initial attach */ 920 if (vap->iv_bss != NULL) { 921 /* 922 * Calculate agressive mode switching threshold based 923 * on beacon interval. This doesn't need locking since 924 * we're only called before entering the RUN state at 925 * which point we start sending beacon frames. 926 */ 927 wme->wme_hipri_switch_thresh = 928 (HIGH_PRI_SWITCH_THRESH * vap->iv_bss->ni_intval) / 100; 929 wme->wme_flags &= ~WME_F_AGGRMODE; 930 ieee80211_wme_updateparams(vap); 931 } 932 } 933 934 void 935 ieee80211_wme_initparams(struct ieee80211vap *vap) 936 { 937 struct ieee80211com *ic = vap->iv_ic; 938 939 ic = vap->iv_ic; 940 IEEE80211_LOCK(ic); 941 ieee80211_wme_initparams_locked(vap); 942 IEEE80211_UNLOCK(ic); 943 } 944 945 /* 946 * Update WME parameters for ourself and the BSS. 947 */ 948 void 949 ieee80211_wme_updateparams_locked(struct ieee80211vap *vap) 950 { 951 static const paramType aggrParam[IEEE80211_MODE_MAX] = { 952 [IEEE80211_MODE_AUTO] = { 2, 4, 10, 64, 0 }, 953 [IEEE80211_MODE_11A] = { 2, 4, 10, 64, 0 }, 954 [IEEE80211_MODE_11B] = { 2, 5, 10, 64, 0 }, 955 [IEEE80211_MODE_11G] = { 2, 4, 10, 64, 0 }, 956 [IEEE80211_MODE_FH] = { 2, 5, 10, 64, 0 }, 957 [IEEE80211_MODE_TURBO_A] = { 1, 3, 10, 64, 0 }, 958 [IEEE80211_MODE_TURBO_G] = { 1, 3, 10, 64, 0 }, 959 [IEEE80211_MODE_STURBO_A] = { 1, 3, 10, 64, 0 }, 960 [IEEE80211_MODE_HALF] = { 2, 4, 10, 64, 0 }, 961 [IEEE80211_MODE_QUARTER] = { 2, 4, 10, 64, 0 }, 962 [IEEE80211_MODE_11NA] = { 2, 4, 10, 64, 0 }, /* XXXcheck*/ 963 [IEEE80211_MODE_11NG] = { 2, 4, 10, 64, 0 }, /* XXXcheck*/ 964 }; 965 struct ieee80211com *ic = vap->iv_ic; 966 struct ieee80211_wme_state *wme = &ic->ic_wme; 967 const struct wmeParams *wmep; 968 struct wmeParams *chanp, *bssp; 969 enum ieee80211_phymode mode; 970 int i; 971 972 /* 973 * Set up the channel access parameters for the physical 974 * device. First populate the configured settings. 975 */ 976 for (i = 0; i < WME_NUM_AC; i++) { 977 chanp = &wme->wme_chanParams.cap_wmeParams[i]; 978 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i]; 979 chanp->wmep_aifsn = wmep->wmep_aifsn; 980 chanp->wmep_logcwmin = wmep->wmep_logcwmin; 981 chanp->wmep_logcwmax = wmep->wmep_logcwmax; 982 chanp->wmep_txopLimit = wmep->wmep_txopLimit; 983 984 chanp = &wme->wme_bssChanParams.cap_wmeParams[i]; 985 wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i]; 986 chanp->wmep_aifsn = wmep->wmep_aifsn; 987 chanp->wmep_logcwmin = wmep->wmep_logcwmin; 988 chanp->wmep_logcwmax = wmep->wmep_logcwmax; 989 chanp->wmep_txopLimit = wmep->wmep_txopLimit; 990 } 991 992 /* 993 * Select mode; we can be called early in which case we 994 * always use auto mode. We know we'll be called when 995 * entering the RUN state with bsschan setup properly 996 * so state will eventually get set correctly 997 */ 998 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC) 999 mode = ieee80211_chan2mode(ic->ic_bsschan); 1000 else 1001 mode = IEEE80211_MODE_AUTO; 1002 1003 /* 1004 * This implements agressive mode as found in certain 1005 * vendors' AP's. When there is significant high 1006 * priority (VI/VO) traffic in the BSS throttle back BE 1007 * traffic by using conservative parameters. Otherwise 1008 * BE uses agressive params to optimize performance of 1009 * legacy/non-QoS traffic. 1010 */ 1011 if ((vap->iv_opmode == IEEE80211_M_HOSTAP && 1012 (wme->wme_flags & WME_F_AGGRMODE) != 0) || 1013 (vap->iv_opmode == IEEE80211_M_STA && 1014 (vap->iv_bss->ni_flags & IEEE80211_NODE_QOS) == 0) || 1015 (vap->iv_flags & IEEE80211_F_WME) == 0) { 1016 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE]; 1017 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE]; 1018 1019 chanp->wmep_aifsn = bssp->wmep_aifsn = aggrParam[mode].aifsn; 1020 chanp->wmep_logcwmin = bssp->wmep_logcwmin = 1021 aggrParam[mode].logcwmin; 1022 chanp->wmep_logcwmax = bssp->wmep_logcwmax = 1023 aggrParam[mode].logcwmax; 1024 chanp->wmep_txopLimit = bssp->wmep_txopLimit = 1025 (vap->iv_flags & IEEE80211_F_BURST) ? 1026 aggrParam[mode].txopLimit : 0; 1027 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 1028 "update %s (chan+bss) [acm %u aifsn %u logcwmin %u " 1029 "logcwmax %u txop %u]\n", ieee80211_wme_acnames[WME_AC_BE], 1030 chanp->wmep_acm, chanp->wmep_aifsn, chanp->wmep_logcwmin, 1031 chanp->wmep_logcwmax, chanp->wmep_txopLimit); 1032 } 1033 1034 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 1035 ic->ic_sta_assoc < 2 && (wme->wme_flags & WME_F_AGGRMODE) != 0) { 1036 static const uint8_t logCwMin[IEEE80211_MODE_MAX] = { 1037 [IEEE80211_MODE_AUTO] = 3, 1038 [IEEE80211_MODE_11A] = 3, 1039 [IEEE80211_MODE_11B] = 4, 1040 [IEEE80211_MODE_11G] = 3, 1041 [IEEE80211_MODE_FH] = 4, 1042 [IEEE80211_MODE_TURBO_A] = 3, 1043 [IEEE80211_MODE_TURBO_G] = 3, 1044 [IEEE80211_MODE_STURBO_A] = 3, 1045 [IEEE80211_MODE_HALF] = 3, 1046 [IEEE80211_MODE_QUARTER] = 3, 1047 [IEEE80211_MODE_11NA] = 3, 1048 [IEEE80211_MODE_11NG] = 3, 1049 }; 1050 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE]; 1051 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE]; 1052 1053 chanp->wmep_logcwmin = bssp->wmep_logcwmin = logCwMin[mode]; 1054 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 1055 "update %s (chan+bss) logcwmin %u\n", 1056 ieee80211_wme_acnames[WME_AC_BE], chanp->wmep_logcwmin); 1057 } 1058 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { /* XXX ibss? */ 1059 /* 1060 * Arrange for a beacon update and bump the parameter 1061 * set number so associated stations load the new values. 1062 */ 1063 wme->wme_bssChanParams.cap_info = 1064 (wme->wme_bssChanParams.cap_info+1) & WME_QOSINFO_COUNT; 1065 ieee80211_beacon_notify(vap, IEEE80211_BEACON_WME); 1066 } 1067 1068 wme->wme_update(ic); 1069 1070 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 1071 "%s: WME params updated, cap_info 0x%x\n", __func__, 1072 vap->iv_opmode == IEEE80211_M_STA ? 1073 wme->wme_wmeChanParams.cap_info : 1074 wme->wme_bssChanParams.cap_info); 1075 } 1076 1077 void 1078 ieee80211_wme_updateparams(struct ieee80211vap *vap) 1079 { 1080 struct ieee80211com *ic = vap->iv_ic; 1081 1082 if (ic->ic_caps & IEEE80211_C_WME) { 1083 IEEE80211_LOCK(ic); 1084 ieee80211_wme_updateparams_locked(vap); 1085 IEEE80211_UNLOCK(ic); 1086 } 1087 } 1088 1089 static void 1090 parent_updown(void *arg, int npending) 1091 { 1092 struct ifnet *parent = arg; 1093 1094 parent->if_ioctl(parent, SIOCSIFFLAGS, NULL, curthread->td_ucred); 1095 } 1096 1097 static void 1098 update_mcast(void *arg, int npending) 1099 { 1100 struct ieee80211com *ic = arg; 1101 struct ifnet *parent = ic->ic_ifp; 1102 1103 ic->ic_update_mcast(parent); 1104 } 1105 1106 static void 1107 update_promisc(void *arg, int npending) 1108 { 1109 struct ieee80211com *ic = arg; 1110 struct ifnet *parent = ic->ic_ifp; 1111 1112 ic->ic_update_promisc(parent); 1113 } 1114 1115 static void 1116 update_channel(void *arg, int npending) 1117 { 1118 struct ieee80211com *ic = arg; 1119 1120 ic->ic_set_channel(ic); 1121 ieee80211_radiotap_chan_change(ic); 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 taskqueue_block(ic->ic_tq); 1133 ieee80211_draintask(ic, &ic->ic_parent_task); 1134 ieee80211_draintask(ic, &ic->ic_mcast_task); 1135 ieee80211_draintask(ic, &ic->ic_promisc_task); 1136 ieee80211_draintask(ic, &ic->ic_chan_task); 1137 ieee80211_draintask(ic, &ic->ic_bmiss_task); 1138 taskqueue_unblock(ic->ic_tq); 1139 } 1140 1141 /* 1142 * Start a vap running. If this is the first vap to be 1143 * set running on the underlying device then we 1144 * automatically bring the device up. 1145 */ 1146 void 1147 ieee80211_start_locked(struct ieee80211vap *vap) 1148 { 1149 struct ifnet *ifp = vap->iv_ifp; 1150 struct ieee80211com *ic = vap->iv_ic; 1151 struct ifnet *parent = ic->ic_ifp; 1152 1153 IEEE80211_LOCK_ASSERT(ic); 1154 1155 IEEE80211_DPRINTF(vap, 1156 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1157 "start running, %d vaps running\n", ic->ic_nrunning); 1158 1159 if ((ifp->if_flags & IFF_RUNNING) == 0) { 1160 /* 1161 * Mark us running. Note that it's ok to do this first; 1162 * if we need to bring the parent device up we defer that 1163 * to avoid dropping the com lock. We expect the device 1164 * to respond to being marked up by calling back into us 1165 * through ieee80211_start_all at which point we'll come 1166 * back in here and complete the work. 1167 */ 1168 ifp->if_flags |= IFF_RUNNING; 1169 /* 1170 * We are not running; if this we are the first vap 1171 * to be brought up auto-up the parent if necessary. 1172 */ 1173 if (ic->ic_nrunning++ == 0 && 1174 (parent->if_flags & IFF_RUNNING) == 0) { 1175 IEEE80211_DPRINTF(vap, 1176 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1177 "%s: up parent %s\n", __func__, parent->if_xname); 1178 parent->if_flags |= IFF_UP; 1179 ieee80211_runtask(ic, &ic->ic_parent_task); 1180 return; 1181 } 1182 } 1183 /* 1184 * If the parent is up and running, then kick the 1185 * 802.11 state machine as appropriate. 1186 */ 1187 if ((parent->if_flags & IFF_RUNNING) && 1188 vap->iv_roaming != IEEE80211_ROAMING_MANUAL) { 1189 if (vap->iv_opmode == IEEE80211_M_STA) { 1190 #if 0 1191 /* XXX bypasses scan too easily; disable for now */ 1192 /* 1193 * Try to be intelligent about clocking the state 1194 * machine. If we're currently in RUN state then 1195 * we should be able to apply any new state/parameters 1196 * simply by re-associating. Otherwise we need to 1197 * re-scan to select an appropriate ap. 1198 */ 1199 if (vap->iv_state >= IEEE80211_S_RUN) 1200 ieee80211_new_state_locked(vap, 1201 IEEE80211_S_ASSOC, 1); 1202 else 1203 #endif 1204 ieee80211_new_state_locked(vap, 1205 IEEE80211_S_SCAN, 0); 1206 } else { 1207 /* 1208 * For monitor+wds mode there's nothing to do but 1209 * start running. Otherwise if this is the first 1210 * vap to be brought up, start a scan which may be 1211 * preempted if the station is locked to a particular 1212 * channel. 1213 */ 1214 vap->iv_flags_ext |= IEEE80211_FEXT_REINIT; 1215 if (vap->iv_opmode == IEEE80211_M_MONITOR || 1216 vap->iv_opmode == IEEE80211_M_WDS) 1217 ieee80211_new_state_locked(vap, 1218 IEEE80211_S_RUN, -1); 1219 else 1220 ieee80211_new_state_locked(vap, 1221 IEEE80211_S_SCAN, 0); 1222 } 1223 } 1224 } 1225 1226 /* 1227 * Start a single vap. 1228 */ 1229 void 1230 ieee80211_init(void *arg) 1231 { 1232 struct ieee80211vap *vap = arg; 1233 1234 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1235 "%s\n", __func__); 1236 1237 IEEE80211_LOCK(vap->iv_ic); 1238 ieee80211_start_locked(vap); 1239 IEEE80211_UNLOCK(vap->iv_ic); 1240 } 1241 1242 /* 1243 * Start all runnable vap's on a device. 1244 */ 1245 void 1246 ieee80211_start_all(struct ieee80211com *ic) 1247 { 1248 struct ieee80211vap *vap; 1249 1250 IEEE80211_LOCK(ic); 1251 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1252 struct ifnet *ifp = vap->iv_ifp; 1253 if (IFNET_IS_UP_RUNNING(ifp)) /* NB: avoid recursion */ 1254 ieee80211_start_locked(vap); 1255 } 1256 IEEE80211_UNLOCK(ic); 1257 } 1258 1259 /* 1260 * Stop a vap. We force it down using the state machine 1261 * then mark it's ifnet not running. If this is the last 1262 * vap running on the underlying device then we close it 1263 * too to insure it will be properly initialized when the 1264 * next vap is brought up. 1265 */ 1266 void 1267 ieee80211_stop_locked(struct ieee80211vap *vap) 1268 { 1269 struct ieee80211com *ic = vap->iv_ic; 1270 struct ifnet *ifp = vap->iv_ifp; 1271 struct ifnet *parent = ic->ic_ifp; 1272 1273 IEEE80211_LOCK_ASSERT(ic); 1274 1275 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1276 "stop running, %d vaps running\n", ic->ic_nrunning); 1277 1278 ieee80211_new_state_locked(vap, IEEE80211_S_INIT, -1); 1279 if (ifp->if_flags & IFF_RUNNING) { 1280 ifp->if_flags &= ~IFF_RUNNING; /* mark us stopped */ 1281 if (--ic->ic_nrunning == 0 && 1282 (parent->if_flags & IFF_RUNNING)) { 1283 IEEE80211_DPRINTF(vap, 1284 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1285 "down parent %s\n", parent->if_xname); 1286 parent->if_flags &= ~IFF_UP; 1287 ieee80211_runtask(ic, &ic->ic_parent_task); 1288 } 1289 } 1290 } 1291 1292 void 1293 ieee80211_stop(struct ieee80211vap *vap) 1294 { 1295 struct ieee80211com *ic = vap->iv_ic; 1296 1297 ic = vap->iv_ic; 1298 IEEE80211_LOCK(ic); 1299 ieee80211_stop_locked(vap); 1300 IEEE80211_UNLOCK(ic); 1301 } 1302 1303 /* 1304 * Stop all vap's running on a device. 1305 */ 1306 void 1307 ieee80211_stop_all(struct ieee80211com *ic) 1308 { 1309 struct ieee80211vap *vap; 1310 1311 IEEE80211_LOCK(ic); 1312 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1313 struct ifnet *ifp = vap->iv_ifp; 1314 if (IFNET_IS_UP_RUNNING(ifp)) /* NB: avoid recursion */ 1315 ieee80211_stop_locked(vap); 1316 } 1317 IEEE80211_UNLOCK(ic); 1318 1319 ieee80211_waitfor_parent(ic); 1320 } 1321 1322 /* 1323 * Stop all vap's running on a device and arrange 1324 * for those that were running to be resumed. 1325 */ 1326 void 1327 ieee80211_suspend_all(struct ieee80211com *ic) 1328 { 1329 struct ieee80211vap *vap; 1330 1331 IEEE80211_LOCK(ic); 1332 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1333 struct ifnet *ifp = vap->iv_ifp; 1334 if (IFNET_IS_UP_RUNNING(ifp)) { /* NB: avoid recursion */ 1335 vap->iv_flags_ext |= IEEE80211_FEXT_RESUME; 1336 ieee80211_stop_locked(vap); 1337 } 1338 } 1339 IEEE80211_UNLOCK(ic); 1340 1341 ieee80211_waitfor_parent(ic); 1342 } 1343 1344 /* 1345 * Start all vap's marked for resume. 1346 */ 1347 void 1348 ieee80211_resume_all(struct ieee80211com *ic) 1349 { 1350 struct ieee80211vap *vap; 1351 1352 IEEE80211_LOCK(ic); 1353 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1354 struct ifnet *ifp = vap->iv_ifp; 1355 if (!IFNET_IS_UP_RUNNING(ifp) && 1356 (vap->iv_flags_ext & IEEE80211_FEXT_RESUME)) { 1357 vap->iv_flags_ext &= ~IEEE80211_FEXT_RESUME; 1358 ieee80211_start_locked(vap); 1359 } 1360 } 1361 IEEE80211_UNLOCK(ic); 1362 } 1363 1364 void 1365 ieee80211_beacon_miss(struct ieee80211com *ic) 1366 { 1367 IEEE80211_LOCK(ic); 1368 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 1369 /* Process in a taskq, the handler may reenter the driver */ 1370 ieee80211_runtask(ic, &ic->ic_bmiss_task); 1371 } 1372 IEEE80211_UNLOCK(ic); 1373 } 1374 1375 static void 1376 beacon_miss(void *arg, int npending) 1377 { 1378 struct ieee80211com *ic = arg; 1379 struct ieee80211vap *vap; 1380 1381 /* XXX locking */ 1382 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1383 /* 1384 * We only pass events through for sta vap's in RUN state; 1385 * may be too restrictive but for now this saves all the 1386 * handlers duplicating these checks. 1387 */ 1388 if (vap->iv_opmode == IEEE80211_M_STA && 1389 vap->iv_state >= IEEE80211_S_RUN && 1390 vap->iv_bmiss != NULL) 1391 vap->iv_bmiss(vap); 1392 } 1393 } 1394 1395 static void 1396 beacon_swmiss(void *arg, int npending) 1397 { 1398 struct ieee80211vap *vap = arg; 1399 1400 if (vap->iv_state != IEEE80211_S_RUN) 1401 return; 1402 1403 /* XXX Call multiple times if npending > zero? */ 1404 vap->iv_bmiss(vap); 1405 } 1406 1407 /* 1408 * Software beacon miss handling. Check if any beacons 1409 * were received in the last period. If not post a 1410 * beacon miss; otherwise reset the counter. 1411 */ 1412 void 1413 ieee80211_swbmiss(void *arg) 1414 { 1415 struct ieee80211vap *vap = arg; 1416 struct ieee80211com *ic = vap->iv_ic; 1417 1418 /* XXX sleep state? */ 1419 KASSERT(vap->iv_state == IEEE80211_S_RUN, 1420 ("wrong state %d", vap->iv_state)); 1421 1422 if (ic->ic_flags & IEEE80211_F_SCAN) { 1423 /* 1424 * If scanning just ignore and reset state. If we get a 1425 * bmiss after coming out of scan because we haven't had 1426 * time to receive a beacon then we should probe the AP 1427 * before posting a real bmiss (unless iv_bmiss_max has 1428 * been artifiically lowered). A cleaner solution might 1429 * be to disable the timer on scan start/end but to handle 1430 * case of multiple sta vap's we'd need to disable the 1431 * timers of all affected vap's. 1432 */ 1433 vap->iv_swbmiss_count = 0; 1434 } else if (vap->iv_swbmiss_count == 0) { 1435 if (vap->iv_bmiss != NULL) 1436 ieee80211_runtask(ic, &vap->iv_swbmiss_task); 1437 if (vap->iv_bmiss_count == 0) /* don't re-arm timer */ 1438 return; 1439 } else 1440 vap->iv_swbmiss_count = 0; 1441 callout_reset(&vap->iv_swbmiss, vap->iv_swbmiss_period, 1442 ieee80211_swbmiss, vap); 1443 } 1444 1445 /* 1446 * Start an 802.11h channel switch. We record the parameters, 1447 * mark the operation pending, notify each vap through the 1448 * beacon update mechanism so it can update the beacon frame 1449 * contents, and then switch vap's to CSA state to block outbound 1450 * traffic. Devices that handle CSA directly can use the state 1451 * switch to do the right thing so long as they call 1452 * ieee80211_csa_completeswitch when it's time to complete the 1453 * channel change. Devices that depend on the net80211 layer can 1454 * use ieee80211_beacon_update to handle the countdown and the 1455 * channel switch. 1456 */ 1457 void 1458 ieee80211_csa_startswitch(struct ieee80211com *ic, 1459 struct ieee80211_channel *c, int mode, int count) 1460 { 1461 struct ieee80211vap *vap; 1462 1463 IEEE80211_LOCK_ASSERT(ic); 1464 1465 ic->ic_csa_newchan = c; 1466 ic->ic_csa_mode = mode; 1467 ic->ic_csa_count = count; 1468 ic->ic_flags |= IEEE80211_F_CSAPENDING; 1469 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1470 if (vap->iv_opmode == IEEE80211_M_HOSTAP || 1471 vap->iv_opmode == IEEE80211_M_IBSS || 1472 vap->iv_opmode == IEEE80211_M_MBSS) 1473 ieee80211_beacon_notify(vap, IEEE80211_BEACON_CSA); 1474 /* switch to CSA state to block outbound traffic */ 1475 if (vap->iv_state == IEEE80211_S_RUN) 1476 ieee80211_new_state_locked(vap, IEEE80211_S_CSA, 0); 1477 } 1478 ieee80211_notify_csa(ic, c, mode, count); 1479 } 1480 1481 static void 1482 csa_completeswitch(struct ieee80211com *ic) 1483 { 1484 struct ieee80211vap *vap; 1485 1486 ic->ic_csa_newchan = NULL; 1487 ic->ic_flags &= ~IEEE80211_F_CSAPENDING; 1488 1489 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1490 if (vap->iv_state == IEEE80211_S_CSA) 1491 ieee80211_new_state_locked(vap, IEEE80211_S_RUN, 0); 1492 } 1493 1494 /* 1495 * Complete an 802.11h channel switch started by ieee80211_csa_startswitch. 1496 * We clear state and move all vap's in CSA state to RUN state 1497 * so they can again transmit. 1498 */ 1499 void 1500 ieee80211_csa_completeswitch(struct ieee80211com *ic) 1501 { 1502 IEEE80211_LOCK_ASSERT(ic); 1503 1504 KASSERT(ic->ic_flags & IEEE80211_F_CSAPENDING, ("csa not pending")); 1505 1506 ieee80211_setcurchan(ic, ic->ic_csa_newchan); 1507 csa_completeswitch(ic); 1508 } 1509 1510 /* 1511 * Cancel an 802.11h channel switch started by ieee80211_csa_startswitch. 1512 * We clear state and move all vap's in CSA state to RUN state 1513 * so they can again transmit. 1514 */ 1515 void 1516 ieee80211_csa_cancelswitch(struct ieee80211com *ic) 1517 { 1518 IEEE80211_LOCK_ASSERT(ic); 1519 1520 csa_completeswitch(ic); 1521 } 1522 1523 /* 1524 * Complete a DFS CAC started by ieee80211_dfs_cac_start. 1525 * We clear state and move all vap's in CAC state to RUN state. 1526 */ 1527 void 1528 ieee80211_cac_completeswitch(struct ieee80211vap *vap0) 1529 { 1530 struct ieee80211com *ic = vap0->iv_ic; 1531 struct ieee80211vap *vap; 1532 1533 IEEE80211_LOCK(ic); 1534 /* 1535 * Complete CAC state change for lead vap first; then 1536 * clock all the other vap's waiting. 1537 */ 1538 KASSERT(vap0->iv_state == IEEE80211_S_CAC, 1539 ("wrong state %d", vap0->iv_state)); 1540 ieee80211_new_state_locked(vap0, IEEE80211_S_RUN, 0); 1541 1542 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1543 if (vap->iv_state == IEEE80211_S_CAC) 1544 ieee80211_new_state_locked(vap, IEEE80211_S_RUN, 0); 1545 IEEE80211_UNLOCK(ic); 1546 } 1547 1548 /* 1549 * Force all vap's other than the specified vap to the INIT state 1550 * and mark them as waiting for a scan to complete. These vaps 1551 * will be brought up when the scan completes and the scanning vap 1552 * reaches RUN state by wakeupwaiting. 1553 */ 1554 static void 1555 markwaiting(struct ieee80211vap *vap0) 1556 { 1557 struct ieee80211com *ic = vap0->iv_ic; 1558 struct ieee80211vap *vap; 1559 1560 IEEE80211_LOCK_ASSERT(ic); 1561 1562 /* 1563 * A vap list entry can not disappear since we are running on the 1564 * taskqueue and a vap destroy will queue and drain another state 1565 * change task. 1566 */ 1567 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1568 if (vap == vap0) 1569 continue; 1570 if (vap->iv_state != IEEE80211_S_INIT) { 1571 /* NB: iv_newstate may drop the lock */ 1572 vap->iv_newstate(vap, IEEE80211_S_INIT, 0); 1573 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT; 1574 } 1575 } 1576 } 1577 1578 /* 1579 * Wakeup all vap's waiting for a scan to complete. This is the 1580 * companion to markwaiting (above) and is used to coordinate 1581 * multiple vaps scanning. 1582 * This is called from the state taskqueue. 1583 */ 1584 static void 1585 wakeupwaiting(struct ieee80211vap *vap0) 1586 { 1587 struct ieee80211com *ic = vap0->iv_ic; 1588 struct ieee80211vap *vap; 1589 1590 IEEE80211_LOCK_ASSERT(ic); 1591 1592 /* 1593 * A vap list entry can not disappear since we are running on the 1594 * taskqueue and a vap destroy will queue and drain another state 1595 * change task. 1596 */ 1597 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1598 if (vap == vap0) 1599 continue; 1600 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANWAIT) { 1601 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANWAIT; 1602 /* NB: sta's cannot go INIT->RUN */ 1603 /* NB: iv_newstate may drop the lock */ 1604 vap->iv_newstate(vap, 1605 vap->iv_opmode == IEEE80211_M_STA ? 1606 IEEE80211_S_SCAN : IEEE80211_S_RUN, 0); 1607 } 1608 } 1609 } 1610 1611 /* 1612 * Handle post state change work common to all operating modes. 1613 */ 1614 static void 1615 ieee80211_newstate_cb(void *xvap, int npending) 1616 { 1617 struct ieee80211vap *vap = xvap; 1618 struct ieee80211com *ic = vap->iv_ic; 1619 enum ieee80211_state nstate, ostate; 1620 int arg, rc; 1621 1622 IEEE80211_LOCK(ic); 1623 nstate = vap->iv_nstate; 1624 arg = vap->iv_nstate_arg; 1625 1626 if (vap->iv_flags_ext & IEEE80211_FEXT_REINIT) { 1627 /* 1628 * We have been requested to drop back to the INIT before 1629 * proceeding to the new state. 1630 */ 1631 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1632 "%s: %s -> %s arg %d\n", __func__, 1633 ieee80211_state_name[vap->iv_state], 1634 ieee80211_state_name[IEEE80211_S_INIT], arg); 1635 vap->iv_newstate(vap, IEEE80211_S_INIT, arg); 1636 vap->iv_flags_ext &= ~IEEE80211_FEXT_REINIT; 1637 } 1638 1639 ostate = vap->iv_state; 1640 if (nstate == IEEE80211_S_SCAN && ostate != IEEE80211_S_INIT) { 1641 /* 1642 * SCAN was forced; e.g. on beacon miss. Force other running 1643 * vap's to INIT state and mark them as waiting for the scan to 1644 * complete. This insures they don't interfere with our 1645 * scanning. Since we are single threaded the vaps can not 1646 * transition again while we are executing. 1647 * 1648 * XXX not always right, assumes ap follows sta 1649 */ 1650 markwaiting(vap); 1651 } 1652 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1653 "%s: %s -> %s arg %d\n", __func__, 1654 ieee80211_state_name[ostate], ieee80211_state_name[nstate], arg); 1655 1656 rc = vap->iv_newstate(vap, nstate, arg); 1657 vap->iv_flags_ext &= ~IEEE80211_FEXT_STATEWAIT; 1658 if (rc != 0) { 1659 /* State transition failed */ 1660 KASSERT(rc != EINPROGRESS, ("iv_newstate was deferred")); 1661 KASSERT(nstate != IEEE80211_S_INIT, 1662 ("INIT state change failed")); 1663 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1664 "%s: %s returned error %d\n", __func__, 1665 ieee80211_state_name[nstate], rc); 1666 goto done; 1667 } 1668 1669 /* No actual transition, skip post processing */ 1670 if (ostate == nstate) 1671 goto done; 1672 1673 if (nstate == IEEE80211_S_RUN) { 1674 /* 1675 * OACTIVE may be set on the vap if the upper layer 1676 * tried to transmit (e.g. IPv6 NDP) before we reach 1677 * RUN state. Clear it and restart xmit. 1678 * 1679 * Note this can also happen as a result of SLEEP->RUN 1680 * (i.e. coming out of power save mode). 1681 */ 1682 vap->iv_ifp->if_flags &= ~IFF_OACTIVE; 1683 vap->iv_ifp->if_start(vap->iv_ifp); 1684 1685 /* bring up any vaps waiting on us */ 1686 wakeupwaiting(vap); 1687 } else if (nstate == IEEE80211_S_INIT) { 1688 /* 1689 * Flush the scan cache if we did the last scan (XXX?) 1690 * and flush any frames on send queues from this vap. 1691 * Note the mgt q is used only for legacy drivers and 1692 * will go away shortly. 1693 */ 1694 ieee80211_scan_flush(vap); 1695 1696 /* XXX NB: cast for altq */ 1697 ieee80211_flush_ifq((struct ifqueue *)&ic->ic_ifp->if_snd, vap); 1698 } 1699 done: 1700 IEEE80211_UNLOCK(ic); 1701 } 1702 1703 /* 1704 * Public interface for initiating a state machine change. 1705 * This routine single-threads the request and coordinates 1706 * the scheduling of multiple vaps for the purpose of selecting 1707 * an operating channel. Specifically the following scenarios 1708 * are handled: 1709 * o only one vap can be selecting a channel so on transition to 1710 * SCAN state if another vap is already scanning then 1711 * mark the caller for later processing and return without 1712 * doing anything (XXX? expectations by caller of synchronous operation) 1713 * o only one vap can be doing CAC of a channel so on transition to 1714 * CAC state if another vap is already scanning for radar then 1715 * mark the caller for later processing and return without 1716 * doing anything (XXX? expectations by caller of synchronous operation) 1717 * o if another vap is already running when a request is made 1718 * to SCAN then an operating channel has been chosen; bypass 1719 * the scan and just join the channel 1720 * 1721 * Note that the state change call is done through the iv_newstate 1722 * method pointer so any driver routine gets invoked. The driver 1723 * will normally call back into operating mode-specific 1724 * ieee80211_newstate routines (below) unless it needs to completely 1725 * bypass the state machine (e.g. because the firmware has it's 1726 * own idea how things should work). Bypassing the net80211 layer 1727 * is usually a mistake and indicates lack of proper integration 1728 * with the net80211 layer. 1729 */ 1730 static int 1731 ieee80211_new_state_locked(struct ieee80211vap *vap, 1732 enum ieee80211_state nstate, int arg) 1733 { 1734 struct ieee80211com *ic = vap->iv_ic; 1735 struct ieee80211vap *vp; 1736 enum ieee80211_state ostate; 1737 int nrunning, nscanning; 1738 1739 IEEE80211_LOCK_ASSERT(ic); 1740 1741 if (vap->iv_flags_ext & IEEE80211_FEXT_STATEWAIT) { 1742 if (vap->iv_nstate == IEEE80211_S_INIT) { 1743 /* 1744 * XXX The vap is being stopped, do no allow any other 1745 * state changes until this is completed. 1746 */ 1747 return -1; 1748 } else if (vap->iv_state != vap->iv_nstate) { 1749 #if 0 1750 /* Warn if the previous state hasn't completed. */ 1751 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1752 "%s: pending %s -> %s transition lost\n", __func__, 1753 ieee80211_state_name[vap->iv_state], 1754 ieee80211_state_name[vap->iv_nstate]); 1755 #else 1756 /* XXX temporarily enable to identify issues */ 1757 if_printf(vap->iv_ifp, 1758 "%s: pending %s -> %s transition lost\n", 1759 __func__, ieee80211_state_name[vap->iv_state], 1760 ieee80211_state_name[vap->iv_nstate]); 1761 #endif 1762 } 1763 } 1764 1765 nrunning = nscanning = 0; 1766 /* XXX can track this state instead of calculating */ 1767 TAILQ_FOREACH(vp, &ic->ic_vaps, iv_next) { 1768 if (vp != vap) { 1769 if (vp->iv_state >= IEEE80211_S_RUN) 1770 nrunning++; 1771 /* XXX doesn't handle bg scan */ 1772 /* NB: CAC+AUTH+ASSOC treated like SCAN */ 1773 else if (vp->iv_state > IEEE80211_S_INIT) 1774 nscanning++; 1775 } 1776 } 1777 ostate = vap->iv_state; 1778 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1779 "%s: %s -> %s (nrunning %d nscanning %d)\n", __func__, 1780 ieee80211_state_name[ostate], ieee80211_state_name[nstate], 1781 nrunning, nscanning); 1782 switch (nstate) { 1783 case IEEE80211_S_SCAN: 1784 if (ostate == IEEE80211_S_INIT) { 1785 /* 1786 * INIT -> SCAN happens on initial bringup. 1787 */ 1788 KASSERT(!(nscanning && nrunning), 1789 ("%d scanning and %d running", nscanning, nrunning)); 1790 if (nscanning) { 1791 /* 1792 * Someone is scanning, defer our state 1793 * change until the work has completed. 1794 */ 1795 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1796 "%s: defer %s -> %s\n", 1797 __func__, ieee80211_state_name[ostate], 1798 ieee80211_state_name[nstate]); 1799 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT; 1800 return 0; 1801 } 1802 if (nrunning) { 1803 /* 1804 * Someone is operating; just join the channel 1805 * they have chosen. 1806 */ 1807 /* XXX kill arg? */ 1808 /* XXX check each opmode, adhoc? */ 1809 if (vap->iv_opmode == IEEE80211_M_STA) 1810 nstate = IEEE80211_S_SCAN; 1811 else 1812 nstate = IEEE80211_S_RUN; 1813 #ifdef IEEE80211_DEBUG 1814 if (nstate != IEEE80211_S_SCAN) { 1815 IEEE80211_DPRINTF(vap, 1816 IEEE80211_MSG_STATE, 1817 "%s: override, now %s -> %s\n", 1818 __func__, 1819 ieee80211_state_name[ostate], 1820 ieee80211_state_name[nstate]); 1821 } 1822 #endif 1823 } 1824 } 1825 break; 1826 case IEEE80211_S_RUN: 1827 if (vap->iv_opmode == IEEE80211_M_WDS && 1828 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) && 1829 nscanning) { 1830 /* 1831 * Legacy WDS with someone else scanning; don't 1832 * go online until that completes as we should 1833 * follow the other vap to the channel they choose. 1834 */ 1835 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1836 "%s: defer %s -> %s (legacy WDS)\n", __func__, 1837 ieee80211_state_name[ostate], 1838 ieee80211_state_name[nstate]); 1839 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT; 1840 return 0; 1841 } 1842 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 1843 IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) && 1844 (vap->iv_flags_ext & IEEE80211_FEXT_DFS) && 1845 !IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) { 1846 /* 1847 * This is a DFS channel, transition to CAC state 1848 * instead of RUN. This allows us to initiate 1849 * Channel Availability Check (CAC) as specified 1850 * by 11h/DFS. 1851 */ 1852 nstate = IEEE80211_S_CAC; 1853 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1854 "%s: override %s -> %s (DFS)\n", __func__, 1855 ieee80211_state_name[ostate], 1856 ieee80211_state_name[nstate]); 1857 } 1858 break; 1859 case IEEE80211_S_INIT: 1860 /* cancel any scan in progress */ 1861 ieee80211_cancel_scan(vap); 1862 if (ostate == IEEE80211_S_INIT ) { 1863 /* XXX don't believe this */ 1864 /* INIT -> INIT. nothing to do */ 1865 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANWAIT; 1866 } 1867 /* fall thru... */ 1868 default: 1869 break; 1870 } 1871 /* defer the state change to a thread */ 1872 vap->iv_nstate = nstate; 1873 vap->iv_nstate_arg = arg; 1874 vap->iv_flags_ext |= IEEE80211_FEXT_STATEWAIT; 1875 ieee80211_runtask(ic, &vap->iv_nstate_task); 1876 return EINPROGRESS; 1877 } 1878 1879 int 1880 ieee80211_new_state(struct ieee80211vap *vap, 1881 enum ieee80211_state nstate, int arg) 1882 { 1883 struct ieee80211com *ic = vap->iv_ic; 1884 int rc; 1885 1886 ic = vap->iv_ic; 1887 IEEE80211_LOCK(ic); 1888 rc = ieee80211_new_state_locked(vap, nstate, arg); 1889 IEEE80211_UNLOCK(ic); 1890 return rc; 1891 } 1892