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/ifq_var.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_task(void *, int); 103 static void beacon_swmiss_task(void *, int); 104 static void parent_updown_task(void *, int); 105 static void update_mcast_task(void *, int); 106 static void update_promisc_task(void *, int); 107 static void update_channel_task(void *, int); 108 static void ieee80211_newstate_task(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_task, ifp); 143 TASK_INIT(&ic->ic_mcast_task, 0, update_mcast_task, ic); 144 TASK_INIT(&ic->ic_promisc_task, 0, update_promisc_task, ic); 145 TASK_INIT(&ic->ic_chan_task, 0, update_channel_task, ic); 146 TASK_INIT(&ic->ic_bmiss_task, 0, beacon_miss_task, 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_task, vap); 199 TASK_INIT(&vap->iv_swbmiss_task, 0, beacon_swmiss_task, 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 char ethstr[ETHER_ADDRSTRLEN + 1]; 389 390 wh = (const struct ieee80211_frame *)buf; 391 switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) { 392 case IEEE80211_FC1_DIR_NODS: 393 kprintf("NODS %s", kether_ntoa(wh->i_addr2, ethstr)); 394 kprintf("->%s", kether_ntoa(wh->i_addr1, ethstr)); 395 kprintf("(%s)", kether_ntoa(wh->i_addr3, ethstr)); 396 break; 397 case IEEE80211_FC1_DIR_TODS: 398 kprintf("TODS %s", kether_ntoa(wh->i_addr2, ethstr)); 399 kprintf("->%s", kether_ntoa(wh->i_addr3, ethstr)); 400 kprintf("(%s)", kether_ntoa(wh->i_addr1, ethstr)); 401 break; 402 case IEEE80211_FC1_DIR_FROMDS: 403 kprintf("FRDS %s", kether_ntoa(wh->i_addr3, ethstr)); 404 kprintf("->%s", kether_ntoa(wh->i_addr1, ethstr)); 405 kprintf("(%s)", kether_ntoa(wh->i_addr2, ethstr)); 406 break; 407 case IEEE80211_FC1_DIR_DSTODS: 408 kprintf("DSDS %s", kether_ntoa((const uint8_t *)&wh[1], ethstr)); 409 kprintf("->%s", kether_ntoa(wh->i_addr3, ethstr)); 410 kprintf("(%s", kether_ntoa(wh->i_addr2, ethstr)); 411 kprintf("->%s)", kether_ntoa(wh->i_addr1, ethstr)); 412 break; 413 } 414 switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) { 415 case IEEE80211_FC0_TYPE_DATA: 416 kprintf(" data"); 417 break; 418 case IEEE80211_FC0_TYPE_MGT: 419 kprintf(" %s", ieee80211_mgt_subtype_name[ 420 (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) 421 >> IEEE80211_FC0_SUBTYPE_SHIFT]); 422 break; 423 default: 424 kprintf(" type#%d", wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK); 425 break; 426 } 427 if (IEEE80211_QOS_HAS_SEQ(wh)) { 428 const struct ieee80211_qosframe *qwh = 429 (const struct ieee80211_qosframe *)buf; 430 kprintf(" QoS [TID %u%s]", qwh->i_qos[0] & IEEE80211_QOS_TID, 431 qwh->i_qos[0] & IEEE80211_QOS_ACKPOLICY ? " ACM" : ""); 432 } 433 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 434 int off; 435 436 off = ieee80211_anyhdrspace(ic, wh); 437 kprintf(" WEP [IV %.02x %.02x %.02x", 438 buf[off+0], buf[off+1], buf[off+2]); 439 if (buf[off+IEEE80211_WEP_IVLEN] & IEEE80211_WEP_EXTIV) 440 kprintf(" %.02x %.02x %.02x", 441 buf[off+4], buf[off+5], buf[off+6]); 442 kprintf(" KID %u]", buf[off+IEEE80211_WEP_IVLEN] >> 6); 443 } 444 if (rate >= 0) 445 kprintf(" %dM", rate / 2); 446 if (rssi >= 0) 447 kprintf(" +%d", rssi); 448 kprintf("\n"); 449 if (len > 0) { 450 for (i = 0; i < len; i++) { 451 if ((i & 1) == 0) 452 kprintf(" "); 453 kprintf("%02x", buf[i]); 454 } 455 kprintf("\n"); 456 } 457 } 458 459 static __inline int 460 findrix(const struct ieee80211_rateset *rs, int r) 461 { 462 int i; 463 464 for (i = 0; i < rs->rs_nrates; i++) 465 if ((rs->rs_rates[i] & IEEE80211_RATE_VAL) == r) 466 return i; 467 return -1; 468 } 469 470 int 471 ieee80211_fix_rate(struct ieee80211_node *ni, 472 struct ieee80211_rateset *nrs, int flags) 473 { 474 #define RV(v) ((v) & IEEE80211_RATE_VAL) 475 struct ieee80211vap *vap = ni->ni_vap; 476 struct ieee80211com *ic = ni->ni_ic; 477 int i, j, rix, error; 478 int okrate, badrate, fixedrate, ucastrate; 479 const struct ieee80211_rateset *srs; 480 uint8_t r; 481 482 error = 0; 483 okrate = badrate = 0; 484 ucastrate = vap->iv_txparms[ieee80211_chan2mode(ni->ni_chan)].ucastrate; 485 if (ucastrate != IEEE80211_FIXED_RATE_NONE) { 486 /* 487 * Workaround awkwardness with fixed rate. We are called 488 * to check both the legacy rate set and the HT rate set 489 * but we must apply any legacy fixed rate check only to the 490 * legacy rate set and vice versa. We cannot tell what type 491 * of rate set we've been given (legacy or HT) but we can 492 * distinguish the fixed rate type (MCS have 0x80 set). 493 * So to deal with this the caller communicates whether to 494 * check MCS or legacy rate using the flags and we use the 495 * type of any fixed rate to avoid applying an MCS to a 496 * legacy rate and vice versa. 497 */ 498 if (ucastrate & 0x80) { 499 if (flags & IEEE80211_F_DOFRATE) 500 flags &= ~IEEE80211_F_DOFRATE; 501 } else if ((ucastrate & 0x80) == 0) { 502 if (flags & IEEE80211_F_DOFMCS) 503 flags &= ~IEEE80211_F_DOFMCS; 504 } 505 /* NB: required to make MCS match below work */ 506 ucastrate &= IEEE80211_RATE_VAL; 507 } 508 fixedrate = IEEE80211_FIXED_RATE_NONE; 509 /* 510 * XXX we are called to process both MCS and legacy rates; 511 * we must use the appropriate basic rate set or chaos will 512 * ensue; for now callers that want MCS must supply 513 * IEEE80211_F_DOBRS; at some point we'll need to split this 514 * function so there are two variants, one for MCS and one 515 * for legacy rates. 516 */ 517 if (flags & IEEE80211_F_DOBRS) 518 srs = (const struct ieee80211_rateset *) 519 ieee80211_get_suphtrates(ic, ni->ni_chan); 520 else 521 srs = ieee80211_get_suprates(ic, ni->ni_chan); 522 for (i = 0; i < nrs->rs_nrates; ) { 523 if (flags & IEEE80211_F_DOSORT) { 524 /* 525 * Sort rates. 526 */ 527 for (j = i + 1; j < nrs->rs_nrates; j++) { 528 if (RV(nrs->rs_rates[i]) > RV(nrs->rs_rates[j])) { 529 r = nrs->rs_rates[i]; 530 nrs->rs_rates[i] = nrs->rs_rates[j]; 531 nrs->rs_rates[j] = r; 532 } 533 } 534 } 535 r = nrs->rs_rates[i] & IEEE80211_RATE_VAL; 536 badrate = r; 537 /* 538 * Check for fixed rate. 539 */ 540 if (r == ucastrate) 541 fixedrate = r; 542 /* 543 * Check against supported rates. 544 */ 545 rix = findrix(srs, r); 546 if (flags & IEEE80211_F_DONEGO) { 547 if (rix < 0) { 548 /* 549 * A rate in the node's rate set is not 550 * supported. If this is a basic rate and we 551 * are operating as a STA then this is an error. 552 * Otherwise we just discard/ignore the rate. 553 */ 554 if ((flags & IEEE80211_F_JOIN) && 555 (nrs->rs_rates[i] & IEEE80211_RATE_BASIC)) 556 error++; 557 } else if ((flags & IEEE80211_F_JOIN) == 0) { 558 /* 559 * Overwrite with the supported rate 560 * value so any basic rate bit is set. 561 */ 562 nrs->rs_rates[i] = srs->rs_rates[rix]; 563 } 564 } 565 if ((flags & IEEE80211_F_DODEL) && rix < 0) { 566 /* 567 * Delete unacceptable rates. 568 */ 569 nrs->rs_nrates--; 570 for (j = i; j < nrs->rs_nrates; j++) 571 nrs->rs_rates[j] = nrs->rs_rates[j + 1]; 572 nrs->rs_rates[j] = 0; 573 continue; 574 } 575 if (rix >= 0) 576 okrate = nrs->rs_rates[i]; 577 i++; 578 } 579 if (okrate == 0 || error != 0 || 580 ((flags & (IEEE80211_F_DOFRATE|IEEE80211_F_DOFMCS)) && 581 fixedrate != ucastrate)) { 582 IEEE80211_NOTE(vap, IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni, 583 "%s: flags 0x%x okrate %d error %d fixedrate 0x%x " 584 "ucastrate %x\n", __func__, flags, okrate, error, 585 fixedrate, ucastrate); 586 return badrate | IEEE80211_RATE_BASIC; 587 } else 588 return RV(okrate); 589 #undef RV 590 } 591 592 /* 593 * Reset 11g-related state. 594 */ 595 void 596 ieee80211_reset_erp(struct ieee80211com *ic) 597 { 598 ic->ic_flags &= ~IEEE80211_F_USEPROT; 599 ic->ic_nonerpsta = 0; 600 ic->ic_longslotsta = 0; 601 /* 602 * Short slot time is enabled only when operating in 11g 603 * and not in an IBSS. We must also honor whether or not 604 * the driver is capable of doing it. 605 */ 606 ieee80211_set_shortslottime(ic, 607 IEEE80211_IS_CHAN_A(ic->ic_curchan) || 608 IEEE80211_IS_CHAN_HT(ic->ic_curchan) || 609 (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 610 ic->ic_opmode == IEEE80211_M_HOSTAP && 611 (ic->ic_caps & IEEE80211_C_SHSLOT))); 612 /* 613 * Set short preamble and ERP barker-preamble flags. 614 */ 615 if (IEEE80211_IS_CHAN_A(ic->ic_curchan) || 616 (ic->ic_caps & IEEE80211_C_SHPREAMBLE)) { 617 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 618 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 619 } else { 620 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 621 ic->ic_flags |= IEEE80211_F_USEBARKER; 622 } 623 } 624 625 /* 626 * Set the short slot time state and notify the driver. 627 */ 628 void 629 ieee80211_set_shortslottime(struct ieee80211com *ic, int onoff) 630 { 631 if (onoff) 632 ic->ic_flags |= IEEE80211_F_SHSLOT; 633 else 634 ic->ic_flags &= ~IEEE80211_F_SHSLOT; 635 /* notify driver */ 636 if (ic->ic_updateslot != NULL) 637 ic->ic_updateslot(ic->ic_ifp); 638 } 639 640 /* 641 * Check if the specified rate set supports ERP. 642 * NB: the rate set is assumed to be sorted. 643 */ 644 int 645 ieee80211_iserp_rateset(const struct ieee80211_rateset *rs) 646 { 647 static const int rates[] = { 2, 4, 11, 22, 12, 24, 48 }; 648 int i, j; 649 650 if (rs->rs_nrates < NELEM(rates)) 651 return 0; 652 for (i = 0; i < NELEM(rates); i++) { 653 for (j = 0; j < rs->rs_nrates; j++) { 654 int r = rs->rs_rates[j] & IEEE80211_RATE_VAL; 655 if (rates[i] == r) 656 goto next; 657 if (r > rates[i]) 658 return 0; 659 } 660 return 0; 661 next: 662 ; 663 } 664 return 1; 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 if ((ic->ic_caps & IEEE80211_C_WME) == 0 || ic->ic_nrunning > 1) 876 return; 877 878 /* 879 * Select mode; we can be called early in which case we 880 * always use auto mode. We know we'll be called when 881 * entering the RUN state with bsschan setup properly 882 * so state will eventually get set correctly 883 */ 884 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC) 885 mode = ieee80211_chan2mode(ic->ic_bsschan); 886 else 887 mode = IEEE80211_MODE_AUTO; 888 for (i = 0; i < WME_NUM_AC; i++) { 889 switch (i) { 890 case WME_AC_BK: 891 pPhyParam = &phyParamForAC_BK[mode]; 892 pBssPhyParam = &phyParamForAC_BK[mode]; 893 break; 894 case WME_AC_VI: 895 pPhyParam = &phyParamForAC_VI[mode]; 896 pBssPhyParam = &bssPhyParamForAC_VI[mode]; 897 break; 898 case WME_AC_VO: 899 pPhyParam = &phyParamForAC_VO[mode]; 900 pBssPhyParam = &bssPhyParamForAC_VO[mode]; 901 break; 902 case WME_AC_BE: 903 default: 904 pPhyParam = &phyParamForAC_BE[mode]; 905 pBssPhyParam = &bssPhyParamForAC_BE[mode]; 906 break; 907 } 908 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i]; 909 if (ic->ic_opmode == IEEE80211_M_HOSTAP) { 910 setwmeparams(vap, "chan", i, wmep, pPhyParam); 911 } else { 912 setwmeparams(vap, "chan", i, wmep, pBssPhyParam); 913 } 914 wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i]; 915 setwmeparams(vap, "bss ", i, wmep, pBssPhyParam); 916 } 917 /* NB: check ic_bss to avoid NULL deref on initial attach */ 918 if (vap->iv_bss != NULL) { 919 /* 920 * Calculate agressive mode switching threshold based 921 * on beacon interval. This doesn't need locking since 922 * we're only called before entering the RUN state at 923 * which point we start sending beacon frames. 924 */ 925 wme->wme_hipri_switch_thresh = 926 (HIGH_PRI_SWITCH_THRESH * vap->iv_bss->ni_intval) / 100; 927 wme->wme_flags &= ~WME_F_AGGRMODE; 928 ieee80211_wme_updateparams(vap); 929 } 930 } 931 932 void 933 ieee80211_wme_initparams(struct ieee80211vap *vap) 934 { 935 ieee80211_wme_initparams_locked(vap); 936 } 937 938 /* 939 * Update WME parameters for ourself and the BSS. 940 */ 941 void 942 ieee80211_wme_updateparams_locked(struct ieee80211vap *vap) 943 { 944 static const paramType aggrParam[IEEE80211_MODE_MAX] = { 945 [IEEE80211_MODE_AUTO] = { 2, 4, 10, 64, 0 }, 946 [IEEE80211_MODE_11A] = { 2, 4, 10, 64, 0 }, 947 [IEEE80211_MODE_11B] = { 2, 5, 10, 64, 0 }, 948 [IEEE80211_MODE_11G] = { 2, 4, 10, 64, 0 }, 949 [IEEE80211_MODE_FH] = { 2, 5, 10, 64, 0 }, 950 [IEEE80211_MODE_TURBO_A] = { 1, 3, 10, 64, 0 }, 951 [IEEE80211_MODE_TURBO_G] = { 1, 3, 10, 64, 0 }, 952 [IEEE80211_MODE_STURBO_A] = { 1, 3, 10, 64, 0 }, 953 [IEEE80211_MODE_HALF] = { 2, 4, 10, 64, 0 }, 954 [IEEE80211_MODE_QUARTER] = { 2, 4, 10, 64, 0 }, 955 [IEEE80211_MODE_11NA] = { 2, 4, 10, 64, 0 }, /* XXXcheck*/ 956 [IEEE80211_MODE_11NG] = { 2, 4, 10, 64, 0 }, /* XXXcheck*/ 957 }; 958 struct ieee80211com *ic = vap->iv_ic; 959 struct ieee80211_wme_state *wme = &ic->ic_wme; 960 const struct wmeParams *wmep; 961 struct wmeParams *chanp, *bssp; 962 enum ieee80211_phymode mode; 963 int i; 964 965 /* 966 * Set up the channel access parameters for the physical 967 * device. First populate the configured settings. 968 */ 969 for (i = 0; i < WME_NUM_AC; i++) { 970 chanp = &wme->wme_chanParams.cap_wmeParams[i]; 971 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i]; 972 chanp->wmep_aifsn = wmep->wmep_aifsn; 973 chanp->wmep_logcwmin = wmep->wmep_logcwmin; 974 chanp->wmep_logcwmax = wmep->wmep_logcwmax; 975 chanp->wmep_txopLimit = wmep->wmep_txopLimit; 976 977 chanp = &wme->wme_bssChanParams.cap_wmeParams[i]; 978 wmep = &wme->wme_wmeBssChanParams.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 } 984 985 /* 986 * Select mode; we can be called early in which case we 987 * always use auto mode. We know we'll be called when 988 * entering the RUN state with bsschan setup properly 989 * so state will eventually get set correctly 990 */ 991 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC) 992 mode = ieee80211_chan2mode(ic->ic_bsschan); 993 else 994 mode = IEEE80211_MODE_AUTO; 995 996 /* 997 * This implements agressive mode as found in certain 998 * vendors' AP's. When there is significant high 999 * priority (VI/VO) traffic in the BSS throttle back BE 1000 * traffic by using conservative parameters. Otherwise 1001 * BE uses agressive params to optimize performance of 1002 * legacy/non-QoS traffic. 1003 */ 1004 if ((vap->iv_opmode == IEEE80211_M_HOSTAP && 1005 (wme->wme_flags & WME_F_AGGRMODE) != 0) || 1006 (vap->iv_opmode == IEEE80211_M_STA && 1007 (vap->iv_bss->ni_flags & IEEE80211_NODE_QOS) == 0) || 1008 (vap->iv_flags & IEEE80211_F_WME) == 0) { 1009 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE]; 1010 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE]; 1011 1012 chanp->wmep_aifsn = bssp->wmep_aifsn = aggrParam[mode].aifsn; 1013 chanp->wmep_logcwmin = bssp->wmep_logcwmin = 1014 aggrParam[mode].logcwmin; 1015 chanp->wmep_logcwmax = bssp->wmep_logcwmax = 1016 aggrParam[mode].logcwmax; 1017 chanp->wmep_txopLimit = bssp->wmep_txopLimit = 1018 (vap->iv_flags & IEEE80211_F_BURST) ? 1019 aggrParam[mode].txopLimit : 0; 1020 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 1021 "update %s (chan+bss) [acm %u aifsn %u logcwmin %u " 1022 "logcwmax %u txop %u]\n", ieee80211_wme_acnames[WME_AC_BE], 1023 chanp->wmep_acm, chanp->wmep_aifsn, chanp->wmep_logcwmin, 1024 chanp->wmep_logcwmax, chanp->wmep_txopLimit); 1025 } 1026 1027 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 1028 ic->ic_sta_assoc < 2 && (wme->wme_flags & WME_F_AGGRMODE) != 0) { 1029 static const uint8_t logCwMin[IEEE80211_MODE_MAX] = { 1030 [IEEE80211_MODE_AUTO] = 3, 1031 [IEEE80211_MODE_11A] = 3, 1032 [IEEE80211_MODE_11B] = 4, 1033 [IEEE80211_MODE_11G] = 3, 1034 [IEEE80211_MODE_FH] = 4, 1035 [IEEE80211_MODE_TURBO_A] = 3, 1036 [IEEE80211_MODE_TURBO_G] = 3, 1037 [IEEE80211_MODE_STURBO_A] = 3, 1038 [IEEE80211_MODE_HALF] = 3, 1039 [IEEE80211_MODE_QUARTER] = 3, 1040 [IEEE80211_MODE_11NA] = 3, 1041 [IEEE80211_MODE_11NG] = 3, 1042 }; 1043 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE]; 1044 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE]; 1045 1046 chanp->wmep_logcwmin = bssp->wmep_logcwmin = logCwMin[mode]; 1047 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 1048 "update %s (chan+bss) logcwmin %u\n", 1049 ieee80211_wme_acnames[WME_AC_BE], chanp->wmep_logcwmin); 1050 } 1051 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { /* XXX ibss? */ 1052 /* 1053 * Arrange for a beacon update and bump the parameter 1054 * set number so associated stations load the new values. 1055 */ 1056 wme->wme_bssChanParams.cap_info = 1057 (wme->wme_bssChanParams.cap_info+1) & WME_QOSINFO_COUNT; 1058 ieee80211_beacon_notify(vap, IEEE80211_BEACON_WME); 1059 } 1060 1061 wme->wme_update(ic); 1062 1063 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 1064 "%s: WME params updated, cap_info 0x%x\n", __func__, 1065 vap->iv_opmode == IEEE80211_M_STA ? 1066 wme->wme_wmeChanParams.cap_info : 1067 wme->wme_bssChanParams.cap_info); 1068 } 1069 1070 void 1071 ieee80211_wme_updateparams(struct ieee80211vap *vap) 1072 { 1073 struct ieee80211com *ic = vap->iv_ic; 1074 1075 if (ic->ic_caps & IEEE80211_C_WME) { 1076 ieee80211_wme_updateparams_locked(vap); 1077 } 1078 } 1079 1080 static void 1081 parent_updown_task(void *arg, int npending) 1082 { 1083 struct ifnet *parent = arg; 1084 1085 wlan_serialize_enter(); 1086 parent->if_ioctl(parent, SIOCSIFFLAGS, NULL, curthread->td_ucred); 1087 wlan_serialize_exit(); 1088 } 1089 1090 static void 1091 update_mcast_task(void *arg, int npending) 1092 { 1093 struct ieee80211com *ic = arg; 1094 struct ifnet *parent = ic->ic_ifp; 1095 1096 wlan_serialize_enter(); 1097 ic->ic_update_mcast(parent); 1098 wlan_serialize_exit(); 1099 } 1100 1101 static void 1102 update_promisc_task(void *arg, int npending) 1103 { 1104 struct ieee80211com *ic = arg; 1105 struct ifnet *parent = ic->ic_ifp; 1106 1107 wlan_serialize_enter(); 1108 ic->ic_update_promisc(parent); 1109 wlan_serialize_exit(); 1110 } 1111 1112 static void 1113 update_channel_task(void *arg, int npending) 1114 { 1115 struct ieee80211com *ic = arg; 1116 1117 wlan_serialize_enter(); 1118 ic->ic_set_channel(ic); 1119 ieee80211_radiotap_chan_change(ic); 1120 wlan_serialize_exit(); 1121 } 1122 1123 /* 1124 * Block until the parent is in a known state. This is 1125 * used after any operations that dispatch a task (e.g. 1126 * to auto-configure the parent device up/down). 1127 */ 1128 void 1129 ieee80211_waitfor_parent(struct ieee80211com *ic) 1130 { 1131 wlan_assert_serialized(); 1132 wlan_serialize_exit(); /* exit to block */ 1133 taskqueue_block(ic->ic_tq); 1134 ieee80211_draintask(ic, &ic->ic_parent_task); 1135 ieee80211_draintask(ic, &ic->ic_mcast_task); 1136 ieee80211_draintask(ic, &ic->ic_promisc_task); 1137 ieee80211_draintask(ic, &ic->ic_chan_task); 1138 ieee80211_draintask(ic, &ic->ic_bmiss_task); 1139 taskqueue_unblock(ic->ic_tq); 1140 wlan_serialize_enter(); /* then re-enter */ 1141 } 1142 1143 /* 1144 * Start a vap running. If this is the first vap to be 1145 * set running on the underlying device then we 1146 * automatically bring the device up. 1147 */ 1148 void 1149 ieee80211_start_locked(struct ieee80211vap *vap) 1150 { 1151 struct ifnet *ifp = vap->iv_ifp; 1152 struct ieee80211com *ic = vap->iv_ic; 1153 struct ifnet *parent = ic->ic_ifp; 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 wlan_assert_serialized(); 1238 1239 ieee80211_start_locked(vap); 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 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1251 struct ifnet *ifp = vap->iv_ifp; 1252 if (IFNET_IS_UP_RUNNING(ifp)) /* NB: avoid recursion */ 1253 ieee80211_start_locked(vap); 1254 } 1255 } 1256 1257 /* 1258 * Stop a vap. We force it down using the state machine 1259 * then mark it's ifnet not running. If this is the last 1260 * vap running on the underlying device then we close it 1261 * too to insure it will be properly initialized when the 1262 * next vap is brought up. 1263 */ 1264 void 1265 ieee80211_stop_locked(struct ieee80211vap *vap) 1266 { 1267 struct ieee80211com *ic = vap->iv_ic; 1268 struct ifnet *ifp = vap->iv_ifp; 1269 struct ifnet *parent = ic->ic_ifp; 1270 1271 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1272 "stop running, %d vaps running\n", ic->ic_nrunning); 1273 1274 ieee80211_new_state_locked(vap, IEEE80211_S_INIT, -1); 1275 if (ifp->if_flags & IFF_RUNNING) { 1276 ifp->if_flags &= ~IFF_RUNNING; /* mark us stopped */ 1277 if (--ic->ic_nrunning == 0 && 1278 (parent->if_flags & IFF_RUNNING)) { 1279 IEEE80211_DPRINTF(vap, 1280 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1281 "down parent %s\n", parent->if_xname); 1282 parent->if_flags &= ~IFF_UP; 1283 ieee80211_runtask(ic, &ic->ic_parent_task); 1284 } 1285 } 1286 } 1287 1288 void 1289 ieee80211_stop(struct ieee80211vap *vap) 1290 { 1291 ieee80211_stop_locked(vap); 1292 } 1293 1294 /* 1295 * Stop all vap's running on a device. 1296 */ 1297 void 1298 ieee80211_stop_all(struct ieee80211com *ic) 1299 { 1300 struct ieee80211vap *vap; 1301 1302 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1303 struct ifnet *ifp = vap->iv_ifp; 1304 if (IFNET_IS_UP_RUNNING(ifp)) /* NB: avoid recursion */ 1305 ieee80211_stop_locked(vap); 1306 } 1307 1308 ieee80211_waitfor_parent(ic); 1309 } 1310 1311 /* 1312 * Stop all vap's running on a device and arrange 1313 * for those that were running to be resumed. 1314 */ 1315 void 1316 ieee80211_suspend_all(struct ieee80211com *ic) 1317 { 1318 struct ieee80211vap *vap; 1319 1320 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1321 struct ifnet *ifp = vap->iv_ifp; 1322 if (IFNET_IS_UP_RUNNING(ifp)) { /* NB: avoid recursion */ 1323 vap->iv_flags_ext |= IEEE80211_FEXT_RESUME; 1324 ieee80211_stop_locked(vap); 1325 } 1326 } 1327 1328 ieee80211_waitfor_parent(ic); 1329 } 1330 1331 /* 1332 * Start all vap's marked for resume. 1333 */ 1334 void 1335 ieee80211_resume_all(struct ieee80211com *ic) 1336 { 1337 struct ieee80211vap *vap; 1338 1339 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1340 struct ifnet *ifp = vap->iv_ifp; 1341 if (!IFNET_IS_UP_RUNNING(ifp) && 1342 (vap->iv_flags_ext & IEEE80211_FEXT_RESUME)) { 1343 vap->iv_flags_ext &= ~IEEE80211_FEXT_RESUME; 1344 ieee80211_start_locked(vap); 1345 } 1346 } 1347 } 1348 1349 void 1350 ieee80211_beacon_miss(struct ieee80211com *ic) 1351 { 1352 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 1353 /* Process in a taskq, the handler may reenter the driver */ 1354 ieee80211_runtask(ic, &ic->ic_bmiss_task); 1355 } 1356 } 1357 1358 static void 1359 beacon_miss_task(void *arg, int npending) 1360 { 1361 struct ieee80211com *ic = arg; 1362 struct ieee80211vap *vap; 1363 1364 wlan_serialize_enter(); 1365 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1366 /* 1367 * We only pass events through for sta vap's in RUN state; 1368 * may be too restrictive but for now this saves all the 1369 * handlers duplicating these checks. 1370 */ 1371 if (vap->iv_opmode == IEEE80211_M_STA && 1372 vap->iv_state >= IEEE80211_S_RUN && 1373 vap->iv_bmiss != NULL) 1374 vap->iv_bmiss(vap); 1375 } 1376 wlan_serialize_exit(); 1377 } 1378 1379 static void 1380 beacon_swmiss_task(void *arg, int npending) 1381 { 1382 struct ieee80211vap *vap = arg; 1383 1384 wlan_serialize_enter(); 1385 if (vap->iv_state == IEEE80211_S_RUN) { 1386 /* XXX Call multiple times if npending > zero? */ 1387 vap->iv_bmiss(vap); 1388 } 1389 wlan_serialize_exit(); 1390 } 1391 1392 /* 1393 * Software beacon miss handling. Check if any beacons 1394 * were received in the last period. If not post a 1395 * beacon miss; otherwise reset the counter. 1396 */ 1397 void 1398 ieee80211_swbmiss_callout(void *arg) 1399 { 1400 struct ieee80211vap *vap = arg; 1401 struct ieee80211com *ic = vap->iv_ic; 1402 1403 wlan_serialize_enter(); 1404 KASSERT(vap->iv_state == IEEE80211_S_RUN, 1405 ("wrong state %d", vap->iv_state)); 1406 1407 if (ic->ic_flags & IEEE80211_F_SCAN) { 1408 /* 1409 * If scanning just ignore and reset state. If we get a 1410 * bmiss after coming out of scan because we haven't had 1411 * time to receive a beacon then we should probe the AP 1412 * before posting a real bmiss (unless iv_bmiss_max has 1413 * been artifiically lowered). A cleaner solution might 1414 * be to disable the timer on scan start/end but to handle 1415 * case of multiple sta vap's we'd need to disable the 1416 * timers of all affected vap's. 1417 */ 1418 vap->iv_swbmiss_count = 0; 1419 } else if (vap->iv_swbmiss_count == 0) { 1420 if (vap->iv_bmiss != NULL) 1421 ieee80211_runtask(ic, &vap->iv_swbmiss_task); 1422 if (vap->iv_bmiss_count == 0) /* don't re-arm timer */ 1423 goto done; 1424 } else { 1425 vap->iv_swbmiss_count = 0; 1426 } 1427 callout_reset(&vap->iv_swbmiss, vap->iv_swbmiss_period, 1428 ieee80211_swbmiss_callout, vap); 1429 done: 1430 wlan_serialize_exit(); 1431 } 1432 1433 /* 1434 * Start an 802.11h channel switch. We record the parameters, 1435 * mark the operation pending, notify each vap through the 1436 * beacon update mechanism so it can update the beacon frame 1437 * contents, and then switch vap's to CSA state to block outbound 1438 * traffic. Devices that handle CSA directly can use the state 1439 * switch to do the right thing so long as they call 1440 * ieee80211_csa_completeswitch when it's time to complete the 1441 * channel change. Devices that depend on the net80211 layer can 1442 * use ieee80211_beacon_update to handle the countdown and the 1443 * channel switch. 1444 */ 1445 void 1446 ieee80211_csa_startswitch(struct ieee80211com *ic, 1447 struct ieee80211_channel *c, int mode, int count) 1448 { 1449 struct ieee80211vap *vap; 1450 1451 ic->ic_csa_newchan = c; 1452 ic->ic_csa_mode = mode; 1453 ic->ic_csa_count = count; 1454 ic->ic_flags |= IEEE80211_F_CSAPENDING; 1455 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1456 if (vap->iv_opmode == IEEE80211_M_HOSTAP || 1457 vap->iv_opmode == IEEE80211_M_IBSS || 1458 vap->iv_opmode == IEEE80211_M_MBSS) 1459 ieee80211_beacon_notify(vap, IEEE80211_BEACON_CSA); 1460 /* switch to CSA state to block outbound traffic */ 1461 if (vap->iv_state == IEEE80211_S_RUN) 1462 ieee80211_new_state_locked(vap, IEEE80211_S_CSA, 0); 1463 } 1464 ieee80211_notify_csa(ic, c, mode, count); 1465 } 1466 1467 static void 1468 csa_completeswitch(struct ieee80211com *ic) 1469 { 1470 struct ieee80211vap *vap; 1471 1472 ic->ic_csa_newchan = NULL; 1473 ic->ic_flags &= ~IEEE80211_F_CSAPENDING; 1474 1475 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1476 if (vap->iv_state == IEEE80211_S_CSA) 1477 ieee80211_new_state_locked(vap, IEEE80211_S_RUN, 0); 1478 } 1479 1480 /* 1481 * Complete an 802.11h channel switch started by ieee80211_csa_startswitch. 1482 * We clear state and move all vap's in CSA state to RUN state 1483 * so they can again transmit. 1484 */ 1485 void 1486 ieee80211_csa_completeswitch(struct ieee80211com *ic) 1487 { 1488 KASSERT(ic->ic_flags & IEEE80211_F_CSAPENDING, ("csa not pending")); 1489 1490 ieee80211_setcurchan(ic, ic->ic_csa_newchan); 1491 csa_completeswitch(ic); 1492 } 1493 1494 /* 1495 * Cancel 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_cancelswitch(struct ieee80211com *ic) 1501 { 1502 csa_completeswitch(ic); 1503 } 1504 1505 /* 1506 * Complete a DFS CAC started by ieee80211_dfs_cac_start. 1507 * We clear state and move all vap's in CAC state to RUN state. 1508 */ 1509 void 1510 ieee80211_cac_completeswitch(struct ieee80211vap *vap0) 1511 { 1512 struct ieee80211com *ic = vap0->iv_ic; 1513 struct ieee80211vap *vap; 1514 1515 /* 1516 * Complete CAC state change for lead vap first; then 1517 * clock all the other vap's waiting. 1518 */ 1519 KASSERT(vap0->iv_state == IEEE80211_S_CAC, 1520 ("wrong state %d", vap0->iv_state)); 1521 ieee80211_new_state_locked(vap0, IEEE80211_S_RUN, 0); 1522 1523 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1524 if (vap->iv_state == IEEE80211_S_CAC) 1525 ieee80211_new_state_locked(vap, IEEE80211_S_RUN, 0); 1526 } 1527 1528 /* 1529 * Force all vap's other than the specified vap to the INIT state 1530 * and mark them as waiting for a scan to complete. These vaps 1531 * will be brought up when the scan completes and the scanning vap 1532 * reaches RUN state by wakeupwaiting. 1533 */ 1534 static void 1535 markwaiting(struct ieee80211vap *vap0) 1536 { 1537 struct ieee80211com *ic = vap0->iv_ic; 1538 struct ieee80211vap *vap; 1539 1540 /* 1541 * A vap list entry can not disappear since we are running on the 1542 * taskqueue and a vap destroy will queue and drain another state 1543 * change task. 1544 */ 1545 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1546 if (vap == vap0) 1547 continue; 1548 if (vap->iv_state != IEEE80211_S_INIT) { 1549 /* NB: iv_newstate may drop the lock */ 1550 vap->iv_newstate(vap, IEEE80211_S_INIT, 0); 1551 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT; 1552 } 1553 } 1554 } 1555 1556 /* 1557 * Wakeup all vap's waiting for a scan to complete. This is the 1558 * companion to markwaiting (above) and is used to coordinate 1559 * multiple vaps scanning. 1560 * This is called from the state taskqueue. 1561 */ 1562 static void 1563 wakeupwaiting(struct ieee80211vap *vap0) 1564 { 1565 struct ieee80211com *ic = vap0->iv_ic; 1566 struct ieee80211vap *vap; 1567 1568 /* 1569 * A vap list entry can not disappear since we are running on the 1570 * taskqueue and a vap destroy will queue and drain another state 1571 * change task. 1572 */ 1573 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1574 if (vap == vap0) 1575 continue; 1576 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANWAIT) { 1577 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANWAIT; 1578 /* NB: sta's cannot go INIT->RUN */ 1579 /* NB: iv_newstate may drop the lock */ 1580 vap->iv_newstate(vap, 1581 vap->iv_opmode == IEEE80211_M_STA ? 1582 IEEE80211_S_SCAN : IEEE80211_S_RUN, 0); 1583 } 1584 } 1585 } 1586 1587 /* 1588 * Handle post state change work common to all operating modes. 1589 */ 1590 static void 1591 ieee80211_newstate_task(void *xvap, int npending) 1592 { 1593 struct ieee80211vap *vap = xvap; 1594 struct ieee80211com *ic; 1595 enum ieee80211_state nstate, ostate; 1596 int arg, rc; 1597 1598 wlan_serialize_enter(); 1599 1600 ic = vap->iv_ic; 1601 nstate = vap->iv_nstate; 1602 arg = vap->iv_nstate_arg; 1603 1604 if (vap->iv_flags_ext & IEEE80211_FEXT_REINIT) { 1605 /* 1606 * We have been requested to drop back to the INIT before 1607 * proceeding to the new state. 1608 */ 1609 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1610 "%s: %s -> %s arg %d\n", __func__, 1611 ieee80211_state_name[vap->iv_state], 1612 ieee80211_state_name[IEEE80211_S_INIT], arg); 1613 vap->iv_newstate(vap, IEEE80211_S_INIT, arg); 1614 vap->iv_flags_ext &= ~IEEE80211_FEXT_REINIT; 1615 } 1616 1617 ostate = vap->iv_state; 1618 if (nstate == IEEE80211_S_SCAN && ostate != IEEE80211_S_INIT) { 1619 /* 1620 * SCAN was forced; e.g. on beacon miss. Force other running 1621 * vap's to INIT state and mark them as waiting for the scan to 1622 * complete. This insures they don't interfere with our 1623 * scanning. Since we are single threaded the vaps can not 1624 * transition again while we are executing. 1625 * 1626 * XXX not always right, assumes ap follows sta 1627 */ 1628 markwaiting(vap); 1629 } 1630 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1631 "%s: %s -> %s arg %d\n", __func__, 1632 ieee80211_state_name[ostate], ieee80211_state_name[nstate], arg); 1633 1634 rc = vap->iv_newstate(vap, nstate, arg); 1635 vap->iv_flags_ext &= ~IEEE80211_FEXT_STATEWAIT; 1636 if (rc != 0) { 1637 /* State transition failed */ 1638 KASSERT(rc != EINPROGRESS, ("iv_newstate was deferred")); 1639 KASSERT(nstate != IEEE80211_S_INIT, 1640 ("INIT state change failed")); 1641 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1642 "%s: %s returned error %d\n", __func__, 1643 ieee80211_state_name[nstate], rc); 1644 goto done; 1645 } 1646 1647 /* No actual transition, skip post processing */ 1648 if (ostate == nstate) 1649 goto done; 1650 1651 if (nstate == IEEE80211_S_RUN) { 1652 struct ifaltq_subque *ifsq = 1653 ifq_get_subq_default(&vap->iv_ifp->if_snd); 1654 1655 /* 1656 * OACTIVE may be set on the vap if the upper layer 1657 * tried to transmit (e.g. IPv6 NDP) before we reach 1658 * RUN state. Clear it and restart xmit. 1659 * 1660 * Note this can also happen as a result of SLEEP->RUN 1661 * (i.e. coming out of power save mode). 1662 */ 1663 ifsq_clr_oactive(ifsq); 1664 vap->iv_ifp->if_start(vap->iv_ifp, ifsq); 1665 1666 /* bring up any vaps waiting on us */ 1667 wakeupwaiting(vap); 1668 } else if (nstate == IEEE80211_S_INIT) { 1669 /* 1670 * Flush the scan cache if we did the last scan (XXX?) 1671 * and flush any frames on send queues from this vap. 1672 * Note the mgt q is used only for legacy drivers and 1673 * will go away shortly. 1674 */ 1675 ieee80211_scan_flush(vap); 1676 1677 /* XXX NB: cast for altq */ 1678 ieee80211_flush_ifq(&ic->ic_ifp->if_snd, vap); 1679 } 1680 done: 1681 wlan_serialize_exit(); 1682 } 1683 1684 /* 1685 * Public interface for initiating a state machine change. 1686 * This routine single-threads the request and coordinates 1687 * the scheduling of multiple vaps for the purpose of selecting 1688 * an operating channel. Specifically the following scenarios 1689 * are handled: 1690 * o only one vap can be selecting a channel so on transition to 1691 * SCAN state if another vap is already scanning then 1692 * mark the caller for later processing and return without 1693 * doing anything (XXX? expectations by caller of synchronous operation) 1694 * o only one vap can be doing CAC of a channel so on transition to 1695 * CAC state if another vap is already scanning for radar then 1696 * mark the caller for later processing and return without 1697 * doing anything (XXX? expectations by caller of synchronous operation) 1698 * o if another vap is already running when a request is made 1699 * to SCAN then an operating channel has been chosen; bypass 1700 * the scan and just join the channel 1701 * 1702 * Note that the state change call is done through the iv_newstate 1703 * method pointer so any driver routine gets invoked. The driver 1704 * will normally call back into operating mode-specific 1705 * ieee80211_newstate routines (below) unless it needs to completely 1706 * bypass the state machine (e.g. because the firmware has it's 1707 * own idea how things should work). Bypassing the net80211 layer 1708 * is usually a mistake and indicates lack of proper integration 1709 * with the net80211 layer. 1710 */ 1711 static int 1712 ieee80211_new_state_locked(struct ieee80211vap *vap, 1713 enum ieee80211_state nstate, int arg) 1714 { 1715 struct ieee80211com *ic = vap->iv_ic; 1716 struct ieee80211vap *vp; 1717 enum ieee80211_state ostate; 1718 int nrunning, nscanning; 1719 1720 if (vap->iv_flags_ext & IEEE80211_FEXT_STATEWAIT) { 1721 if (vap->iv_nstate == IEEE80211_S_INIT) { 1722 /* 1723 * XXX The vap is being stopped, do no allow any other 1724 * state changes until this is completed. 1725 */ 1726 return -1; 1727 } else if (vap->iv_state != vap->iv_nstate) { 1728 #if 0 1729 /* Warn if the previous state hasn't completed. */ 1730 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1731 "%s: pending %s -> %s transition lost\n", __func__, 1732 ieee80211_state_name[vap->iv_state], 1733 ieee80211_state_name[vap->iv_nstate]); 1734 #else 1735 /* XXX temporarily enable to identify issues */ 1736 if_printf(vap->iv_ifp, 1737 "%s: pending %s -> %s transition lost\n", 1738 __func__, ieee80211_state_name[vap->iv_state], 1739 ieee80211_state_name[vap->iv_nstate]); 1740 #endif 1741 } 1742 } 1743 1744 nrunning = nscanning = 0; 1745 /* XXX can track this state instead of calculating */ 1746 TAILQ_FOREACH(vp, &ic->ic_vaps, iv_next) { 1747 if (vp != vap) { 1748 if (vp->iv_state >= IEEE80211_S_RUN) 1749 nrunning++; 1750 /* XXX doesn't handle bg scan */ 1751 /* NB: CAC+AUTH+ASSOC treated like SCAN */ 1752 else if (vp->iv_state > IEEE80211_S_INIT) 1753 nscanning++; 1754 } 1755 } 1756 ostate = vap->iv_state; 1757 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1758 "%s: %s -> %s (nrunning %d nscanning %d)\n", __func__, 1759 ieee80211_state_name[ostate], ieee80211_state_name[nstate], 1760 nrunning, nscanning); 1761 switch (nstate) { 1762 case IEEE80211_S_SCAN: 1763 if (ostate == IEEE80211_S_INIT) { 1764 /* 1765 * INIT -> SCAN happens on initial bringup. 1766 */ 1767 KASSERT(!(nscanning && nrunning), 1768 ("%d scanning and %d running", nscanning, nrunning)); 1769 if (nscanning) { 1770 /* 1771 * Someone is scanning, defer our state 1772 * change until the work has completed. 1773 */ 1774 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1775 "%s: defer %s -> %s\n", 1776 __func__, ieee80211_state_name[ostate], 1777 ieee80211_state_name[nstate]); 1778 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT; 1779 return 0; 1780 } 1781 if (nrunning) { 1782 /* 1783 * Someone is operating; just join the channel 1784 * they have chosen. 1785 */ 1786 /* XXX kill arg? */ 1787 /* XXX check each opmode, adhoc? */ 1788 if (vap->iv_opmode == IEEE80211_M_STA) 1789 nstate = IEEE80211_S_SCAN; 1790 else 1791 nstate = IEEE80211_S_RUN; 1792 #ifdef IEEE80211_DEBUG 1793 if (nstate != IEEE80211_S_SCAN) { 1794 IEEE80211_DPRINTF(vap, 1795 IEEE80211_MSG_STATE, 1796 "%s: override, now %s -> %s\n", 1797 __func__, 1798 ieee80211_state_name[ostate], 1799 ieee80211_state_name[nstate]); 1800 } 1801 #endif 1802 } 1803 } 1804 break; 1805 case IEEE80211_S_RUN: 1806 if (vap->iv_opmode == IEEE80211_M_WDS && 1807 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) && 1808 nscanning) { 1809 /* 1810 * Legacy WDS with someone else scanning; don't 1811 * go online until that completes as we should 1812 * follow the other vap to the channel they choose. 1813 */ 1814 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1815 "%s: defer %s -> %s (legacy WDS)\n", __func__, 1816 ieee80211_state_name[ostate], 1817 ieee80211_state_name[nstate]); 1818 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT; 1819 return 0; 1820 } 1821 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 1822 IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) && 1823 (vap->iv_flags_ext & IEEE80211_FEXT_DFS) && 1824 !IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) { 1825 /* 1826 * This is a DFS channel, transition to CAC state 1827 * instead of RUN. This allows us to initiate 1828 * Channel Availability Check (CAC) as specified 1829 * by 11h/DFS. 1830 */ 1831 nstate = IEEE80211_S_CAC; 1832 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1833 "%s: override %s -> %s (DFS)\n", __func__, 1834 ieee80211_state_name[ostate], 1835 ieee80211_state_name[nstate]); 1836 } 1837 break; 1838 case IEEE80211_S_INIT: 1839 /* cancel any scan in progress */ 1840 ieee80211_cancel_scan(vap); 1841 if (ostate == IEEE80211_S_INIT ) { 1842 /* XXX don't believe this */ 1843 /* INIT -> INIT. nothing to do */ 1844 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANWAIT; 1845 } 1846 /* fall thru... */ 1847 default: 1848 break; 1849 } 1850 /* defer the state change to a thread */ 1851 vap->iv_nstate = nstate; 1852 vap->iv_nstate_arg = arg; 1853 vap->iv_flags_ext |= IEEE80211_FEXT_STATEWAIT; 1854 ieee80211_runtask(ic, &vap->iv_nstate_task); 1855 return EINPROGRESS; 1856 } 1857 1858 int 1859 ieee80211_new_state(struct ieee80211vap *vap, 1860 enum ieee80211_state nstate, int arg) 1861 { 1862 int rc; 1863 1864 rc = ieee80211_new_state_locked(vap, nstate, arg); 1865 return rc; 1866 } 1867