1 /*- 2 * Copyright (c) 2001 Atsushi Onoe 3 * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 /* 31 * IEEE 802.11 protocol support. 32 */ 33 34 #include "opt_inet.h" 35 #include "opt_wlan.h" 36 37 #include <sys/param.h> 38 #include <sys/kernel.h> 39 #include <sys/systm.h> 40 41 #include <sys/socket.h> 42 #include <sys/sockio.h> 43 44 #include <net/if.h> 45 #include <net/if_var.h> 46 #include <net/if_media.h> 47 #include <net/ethernet.h> /* XXX for ether_sprintf */ 48 49 #if defined(__DragonFly__) 50 #include <net/ifq_var.h> 51 #endif 52 53 #include <netproto/802_11/ieee80211_var.h> 54 #include <netproto/802_11/ieee80211_adhoc.h> 55 #include <netproto/802_11/ieee80211_sta.h> 56 #include <netproto/802_11/ieee80211_hostap.h> 57 #include <netproto/802_11/ieee80211_wds.h> 58 #ifdef IEEE80211_SUPPORT_MESH 59 #include <netproto/802_11/ieee80211_mesh.h> 60 #endif 61 #include <netproto/802_11/ieee80211_monitor.h> 62 #include <netproto/802_11/ieee80211_input.h> 63 64 /* XXX tunables */ 65 #define AGGRESSIVE_MODE_SWITCH_HYSTERESIS 3 /* pkts / 100ms */ 66 #define HIGH_PRI_SWITCH_THRESH 10 /* pkts / 100ms */ 67 68 const char *ieee80211_mgt_subtype_name[] = { 69 "assoc_req", "assoc_resp", "reassoc_req", "reassoc_resp", 70 "probe_req", "probe_resp", "reserved#6", "reserved#7", 71 "beacon", "atim", "disassoc", "auth", 72 "deauth", "action", "action_noack", "reserved#15" 73 }; 74 const char *ieee80211_ctl_subtype_name[] = { 75 "reserved#0", "reserved#1", "reserved#2", "reserved#3", 76 "reserved#3", "reserved#5", "reserved#6", "reserved#7", 77 "reserved#8", "reserved#9", "ps_poll", "rts", 78 "cts", "ack", "cf_end", "cf_end_ack" 79 }; 80 const char *ieee80211_opmode_name[IEEE80211_OPMODE_MAX] = { 81 "IBSS", /* IEEE80211_M_IBSS */ 82 "STA", /* IEEE80211_M_STA */ 83 "WDS", /* IEEE80211_M_WDS */ 84 "AHDEMO", /* IEEE80211_M_AHDEMO */ 85 "HOSTAP", /* IEEE80211_M_HOSTAP */ 86 "MONITOR", /* IEEE80211_M_MONITOR */ 87 "MBSS" /* IEEE80211_M_MBSS */ 88 }; 89 const char *ieee80211_state_name[IEEE80211_S_MAX] = { 90 "INIT", /* IEEE80211_S_INIT */ 91 "SCAN", /* IEEE80211_S_SCAN */ 92 "AUTH", /* IEEE80211_S_AUTH */ 93 "ASSOC", /* IEEE80211_S_ASSOC */ 94 "CAC", /* IEEE80211_S_CAC */ 95 "RUN", /* IEEE80211_S_RUN */ 96 "CSA", /* IEEE80211_S_CSA */ 97 "SLEEP", /* IEEE80211_S_SLEEP */ 98 }; 99 const char *ieee80211_wme_acnames[] = { 100 "WME_AC_BE", 101 "WME_AC_BK", 102 "WME_AC_VI", 103 "WME_AC_VO", 104 "WME_UPSD", 105 }; 106 107 static void beacon_miss(void *, int); 108 static void beacon_swmiss(void *, int); 109 static void parent_updown(void *, int); 110 static void update_mcast(void *, int); 111 static void update_promisc(void *, int); 112 static void update_channel(void *, int); 113 static void update_chw(void *, int); 114 static void ieee80211_newstate_cb(void *, int); 115 116 static int 117 null_raw_xmit(struct ieee80211_node *ni, struct mbuf *m, 118 const struct ieee80211_bpf_params *params) 119 { 120 struct ifnet *ifp = ni->ni_ic->ic_ifp; 121 122 if_printf(ifp, "missing ic_raw_xmit callback, drop frame\n"); 123 m_freem(m); 124 return ENETDOWN; 125 } 126 127 void 128 ieee80211_proto_attach(struct ieee80211com *ic) 129 { 130 struct ifnet *ifp = ic->ic_ifp; 131 132 /* override the 802.3 setting */ 133 ifp->if_hdrlen = ic->ic_headroom 134 + sizeof(struct ieee80211_qosframe_addr4) 135 + IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN 136 + IEEE80211_WEP_EXTIVLEN; 137 /* XXX no way to recalculate on ifdetach */ 138 if (ALIGN(ifp->if_hdrlen) > max_linkhdr) { 139 /* XXX sanity check... */ 140 max_linkhdr = ALIGN(ifp->if_hdrlen); 141 max_hdr = max_linkhdr + max_protohdr; 142 max_datalen = MHLEN - max_hdr; 143 } 144 ic->ic_protmode = IEEE80211_PROT_CTSONLY; 145 146 TASK_INIT(&ic->ic_parent_task, 0, parent_updown, ifp); 147 TASK_INIT(&ic->ic_mcast_task, 0, update_mcast, ic); 148 TASK_INIT(&ic->ic_promisc_task, 0, update_promisc, ic); 149 TASK_INIT(&ic->ic_chan_task, 0, update_channel, ic); 150 TASK_INIT(&ic->ic_bmiss_task, 0, beacon_miss, ic); 151 TASK_INIT(&ic->ic_chw_task, 0, update_chw, ic); 152 153 ic->ic_wme.wme_hipri_switch_hysteresis = 154 AGGRESSIVE_MODE_SWITCH_HYSTERESIS; 155 156 /* initialize management frame handlers */ 157 ic->ic_send_mgmt = ieee80211_send_mgmt; 158 ic->ic_raw_xmit = null_raw_xmit; 159 160 ieee80211_adhoc_attach(ic); 161 ieee80211_sta_attach(ic); 162 ieee80211_wds_attach(ic); 163 ieee80211_hostap_attach(ic); 164 #ifdef IEEE80211_SUPPORT_MESH 165 ieee80211_mesh_attach(ic); 166 #endif 167 ieee80211_monitor_attach(ic); 168 } 169 170 void 171 ieee80211_proto_detach(struct ieee80211com *ic) 172 { 173 ieee80211_monitor_detach(ic); 174 #ifdef IEEE80211_SUPPORT_MESH 175 ieee80211_mesh_detach(ic); 176 #endif 177 ieee80211_hostap_detach(ic); 178 ieee80211_wds_detach(ic); 179 ieee80211_adhoc_detach(ic); 180 ieee80211_sta_detach(ic); 181 } 182 183 static void 184 null_update_beacon(struct ieee80211vap *vap, int item) 185 { 186 } 187 188 void 189 ieee80211_proto_vattach(struct ieee80211vap *vap) 190 { 191 struct ieee80211com *ic = vap->iv_ic; 192 struct ifnet *ifp = vap->iv_ifp; 193 int i; 194 195 /* override the 802.3 setting */ 196 ifp->if_hdrlen = ic->ic_ifp->if_hdrlen; 197 198 vap->iv_rtsthreshold = IEEE80211_RTS_DEFAULT; 199 vap->iv_fragthreshold = IEEE80211_FRAG_DEFAULT; 200 vap->iv_bmiss_max = IEEE80211_BMISS_MAX; 201 callout_init_mtx(&vap->iv_swbmiss, IEEE80211_LOCK_OBJ(ic), 0); 202 callout_init_mp(&vap->iv_mgtsend); 203 TASK_INIT(&vap->iv_nstate_task, 0, ieee80211_newstate_cb, vap); 204 TASK_INIT(&vap->iv_swbmiss_task, 0, beacon_swmiss, vap); 205 /* 206 * Install default tx rate handling: no fixed rate, lowest 207 * supported rate for mgmt and multicast frames. Default 208 * max retry count. These settings can be changed by the 209 * driver and/or user applications. 210 */ 211 for (i = IEEE80211_MODE_11A; i < IEEE80211_MODE_MAX; i++) { 212 const struct ieee80211_rateset *rs = &ic->ic_sup_rates[i]; 213 214 vap->iv_txparms[i].ucastrate = IEEE80211_FIXED_RATE_NONE; 215 216 /* 217 * Setting the management rate to MCS 0 assumes that the 218 * BSS Basic rate set is empty and the BSS Basic MCS set 219 * is not. 220 * 221 * Since we're not checking this, default to the lowest 222 * defined rate for this mode. 223 * 224 * At least one 11n AP (DLINK DIR-825) is reported to drop 225 * some MCS management traffic (eg BA response frames.) 226 * 227 * See also: 9.6.0 of the 802.11n-2009 specification. 228 */ 229 #ifdef NOTYET 230 if (i == IEEE80211_MODE_11NA || i == IEEE80211_MODE_11NG) { 231 vap->iv_txparms[i].mgmtrate = 0 | IEEE80211_RATE_MCS; 232 vap->iv_txparms[i].mcastrate = 0 | IEEE80211_RATE_MCS; 233 } else { 234 vap->iv_txparms[i].mgmtrate = 235 rs->rs_rates[0] & IEEE80211_RATE_VAL; 236 vap->iv_txparms[i].mcastrate = 237 rs->rs_rates[0] & IEEE80211_RATE_VAL; 238 } 239 #endif 240 vap->iv_txparms[i].mgmtrate = rs->rs_rates[0] & IEEE80211_RATE_VAL; 241 vap->iv_txparms[i].mcastrate = rs->rs_rates[0] & IEEE80211_RATE_VAL; 242 vap->iv_txparms[i].maxretry = IEEE80211_TXMAX_DEFAULT; 243 } 244 vap->iv_roaming = IEEE80211_ROAMING_AUTO; 245 246 vap->iv_update_beacon = null_update_beacon; 247 vap->iv_deliver_data = ieee80211_deliver_data; 248 249 /* attach support for operating mode */ 250 ic->ic_vattach[vap->iv_opmode](vap); 251 } 252 253 void 254 ieee80211_proto_vdetach(struct ieee80211vap *vap) 255 { 256 #define FREEAPPIE(ie) do { \ 257 if (ie != NULL) \ 258 kfree(ie, M_80211_NODE_IE); \ 259 } while (0) 260 /* 261 * Detach operating mode module. 262 */ 263 if (vap->iv_opdetach != NULL) 264 vap->iv_opdetach(vap); 265 /* 266 * This should not be needed as we detach when reseting 267 * the state but be conservative here since the 268 * authenticator may do things like spawn kernel threads. 269 */ 270 if (vap->iv_auth->ia_detach != NULL) 271 vap->iv_auth->ia_detach(vap); 272 /* 273 * Detach any ACL'ator. 274 */ 275 if (vap->iv_acl != NULL) 276 vap->iv_acl->iac_detach(vap); 277 278 FREEAPPIE(vap->iv_appie_beacon); 279 FREEAPPIE(vap->iv_appie_probereq); 280 FREEAPPIE(vap->iv_appie_proberesp); 281 FREEAPPIE(vap->iv_appie_assocreq); 282 FREEAPPIE(vap->iv_appie_assocresp); 283 FREEAPPIE(vap->iv_appie_wpa); 284 #undef FREEAPPIE 285 } 286 287 /* 288 * Simple-minded authenticator module support. 289 */ 290 291 #define IEEE80211_AUTH_MAX (IEEE80211_AUTH_WPA+1) 292 /* XXX well-known names */ 293 static const char *auth_modnames[IEEE80211_AUTH_MAX] = { 294 "wlan_internal", /* IEEE80211_AUTH_NONE */ 295 "wlan_internal", /* IEEE80211_AUTH_OPEN */ 296 "wlan_internal", /* IEEE80211_AUTH_SHARED */ 297 "wlan_xauth", /* IEEE80211_AUTH_8021X */ 298 "wlan_internal", /* IEEE80211_AUTH_AUTO */ 299 "wlan_xauth", /* IEEE80211_AUTH_WPA */ 300 }; 301 static const struct ieee80211_authenticator *authenticators[IEEE80211_AUTH_MAX]; 302 303 static const struct ieee80211_authenticator auth_internal = { 304 .ia_name = "wlan_internal", 305 .ia_attach = NULL, 306 .ia_detach = NULL, 307 .ia_node_join = NULL, 308 .ia_node_leave = NULL, 309 }; 310 311 /* 312 * Setup internal authenticators once; they are never unregistered. 313 */ 314 static void 315 ieee80211_auth_setup(void) 316 { 317 ieee80211_authenticator_register(IEEE80211_AUTH_OPEN, &auth_internal); 318 ieee80211_authenticator_register(IEEE80211_AUTH_SHARED, &auth_internal); 319 ieee80211_authenticator_register(IEEE80211_AUTH_AUTO, &auth_internal); 320 } 321 SYSINIT(wlan_auth, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_auth_setup, NULL); 322 323 const struct ieee80211_authenticator * 324 ieee80211_authenticator_get(int auth) 325 { 326 if (auth >= IEEE80211_AUTH_MAX) 327 return NULL; 328 if (authenticators[auth] == NULL) 329 ieee80211_load_module(auth_modnames[auth]); 330 return authenticators[auth]; 331 } 332 333 void 334 ieee80211_authenticator_register(int type, 335 const struct ieee80211_authenticator *auth) 336 { 337 if (type >= IEEE80211_AUTH_MAX) 338 return; 339 authenticators[type] = auth; 340 } 341 342 void 343 ieee80211_authenticator_unregister(int type) 344 { 345 346 if (type >= IEEE80211_AUTH_MAX) 347 return; 348 authenticators[type] = NULL; 349 } 350 351 /* 352 * Very simple-minded ACL module support. 353 */ 354 /* XXX just one for now */ 355 static const struct ieee80211_aclator *acl = NULL; 356 357 void 358 ieee80211_aclator_register(const struct ieee80211_aclator *iac) 359 { 360 kprintf("wlan: %s acl policy registered\n", iac->iac_name); 361 acl = iac; 362 } 363 364 void 365 ieee80211_aclator_unregister(const struct ieee80211_aclator *iac) 366 { 367 if (acl == iac) 368 acl = NULL; 369 kprintf("wlan: %s acl policy unregistered\n", iac->iac_name); 370 } 371 372 const struct ieee80211_aclator * 373 ieee80211_aclator_get(const char *name) 374 { 375 if (acl == NULL) 376 ieee80211_load_module("wlan_acl"); 377 return acl != NULL && strcmp(acl->iac_name, name) == 0 ? acl : NULL; 378 } 379 380 void 381 ieee80211_print_essid(const uint8_t *essid, int len) 382 { 383 const uint8_t *p; 384 int i; 385 386 if (len > IEEE80211_NWID_LEN) 387 len = IEEE80211_NWID_LEN; 388 /* determine printable or not */ 389 for (i = 0, p = essid; i < len; i++, p++) { 390 if (*p < ' ' || *p > 0x7e) 391 break; 392 } 393 if (i == len) { 394 kprintf("\""); 395 for (i = 0, p = essid; i < len; i++, p++) 396 kprintf("%c", *p); 397 kprintf("\""); 398 } else { 399 kprintf("0x"); 400 for (i = 0, p = essid; i < len; i++, p++) 401 kprintf("%02x", *p); 402 } 403 } 404 405 void 406 ieee80211_dump_pkt(struct ieee80211com *ic, 407 const uint8_t *buf, int len, int rate, int rssi) 408 { 409 const struct ieee80211_frame *wh; 410 int i; 411 412 wh = (const struct ieee80211_frame *)buf; 413 switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) { 414 case IEEE80211_FC1_DIR_NODS: 415 kprintf("NODS %s", ether_sprintf(wh->i_addr2)); 416 kprintf("->%s", ether_sprintf(wh->i_addr1)); 417 kprintf("(%s)", ether_sprintf(wh->i_addr3)); 418 break; 419 case IEEE80211_FC1_DIR_TODS: 420 kprintf("TODS %s", ether_sprintf(wh->i_addr2)); 421 kprintf("->%s", ether_sprintf(wh->i_addr3)); 422 kprintf("(%s)", ether_sprintf(wh->i_addr1)); 423 break; 424 case IEEE80211_FC1_DIR_FROMDS: 425 kprintf("FRDS %s", ether_sprintf(wh->i_addr3)); 426 kprintf("->%s", ether_sprintf(wh->i_addr1)); 427 kprintf("(%s)", ether_sprintf(wh->i_addr2)); 428 break; 429 case IEEE80211_FC1_DIR_DSTODS: 430 kprintf("DSDS %s", ether_sprintf((const uint8_t *)&wh[1])); 431 kprintf("->%s", ether_sprintf(wh->i_addr3)); 432 kprintf("(%s", ether_sprintf(wh->i_addr2)); 433 kprintf("->%s)", ether_sprintf(wh->i_addr1)); 434 break; 435 } 436 switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) { 437 case IEEE80211_FC0_TYPE_DATA: 438 kprintf(" data"); 439 break; 440 case IEEE80211_FC0_TYPE_MGT: 441 kprintf(" %s", ieee80211_mgt_subtype_name[ 442 (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) 443 >> IEEE80211_FC0_SUBTYPE_SHIFT]); 444 break; 445 default: 446 kprintf(" type#%d", wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK); 447 break; 448 } 449 if (IEEE80211_QOS_HAS_SEQ(wh)) { 450 const struct ieee80211_qosframe *qwh = 451 (const struct ieee80211_qosframe *)buf; 452 kprintf(" QoS [TID %u%s]", qwh->i_qos[0] & IEEE80211_QOS_TID, 453 qwh->i_qos[0] & IEEE80211_QOS_ACKPOLICY ? " ACM" : ""); 454 } 455 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 456 int off; 457 458 off = ieee80211_anyhdrspace(ic, wh); 459 kprintf(" WEP [IV %.02x %.02x %.02x", 460 buf[off+0], buf[off+1], buf[off+2]); 461 if (buf[off+IEEE80211_WEP_IVLEN] & IEEE80211_WEP_EXTIV) 462 kprintf(" %.02x %.02x %.02x", 463 buf[off+4], buf[off+5], buf[off+6]); 464 kprintf(" KID %u]", buf[off+IEEE80211_WEP_IVLEN] >> 6); 465 } 466 if (rate >= 0) 467 kprintf(" %dM", rate / 2); 468 if (rssi >= 0) 469 kprintf(" +%d", rssi); 470 kprintf("\n"); 471 if (len > 0) { 472 for (i = 0; i < len; i++) { 473 if ((i & 1) == 0) 474 kprintf(" "); 475 kprintf("%02x", buf[i]); 476 } 477 kprintf("\n"); 478 } 479 } 480 481 static __inline int 482 findrix(const struct ieee80211_rateset *rs, int r) 483 { 484 int i; 485 486 for (i = 0; i < rs->rs_nrates; i++) 487 if ((rs->rs_rates[i] & IEEE80211_RATE_VAL) == r) 488 return i; 489 return -1; 490 } 491 492 int 493 ieee80211_fix_rate(struct ieee80211_node *ni, 494 struct ieee80211_rateset *nrs, int flags) 495 { 496 #define RV(v) ((v) & IEEE80211_RATE_VAL) 497 struct ieee80211vap *vap = ni->ni_vap; 498 struct ieee80211com *ic = ni->ni_ic; 499 int i, j, rix, error; 500 int okrate, badrate, fixedrate, ucastrate; 501 const struct ieee80211_rateset *srs; 502 uint8_t r; 503 504 error = 0; 505 okrate = badrate = 0; 506 ucastrate = vap->iv_txparms[ieee80211_chan2mode(ni->ni_chan)].ucastrate; 507 if (ucastrate != IEEE80211_FIXED_RATE_NONE) { 508 /* 509 * Workaround awkwardness with fixed rate. We are called 510 * to check both the legacy rate set and the HT rate set 511 * but we must apply any legacy fixed rate check only to the 512 * legacy rate set and vice versa. We cannot tell what type 513 * of rate set we've been given (legacy or HT) but we can 514 * distinguish the fixed rate type (MCS have 0x80 set). 515 * So to deal with this the caller communicates whether to 516 * check MCS or legacy rate using the flags and we use the 517 * type of any fixed rate to avoid applying an MCS to a 518 * legacy rate and vice versa. 519 */ 520 if (ucastrate & 0x80) { 521 if (flags & IEEE80211_F_DOFRATE) 522 flags &= ~IEEE80211_F_DOFRATE; 523 } else if ((ucastrate & 0x80) == 0) { 524 if (flags & IEEE80211_F_DOFMCS) 525 flags &= ~IEEE80211_F_DOFMCS; 526 } 527 /* NB: required to make MCS match below work */ 528 ucastrate &= IEEE80211_RATE_VAL; 529 } 530 fixedrate = IEEE80211_FIXED_RATE_NONE; 531 /* 532 * XXX we are called to process both MCS and legacy rates; 533 * we must use the appropriate basic rate set or chaos will 534 * ensue; for now callers that want MCS must supply 535 * IEEE80211_F_DOBRS; at some point we'll need to split this 536 * function so there are two variants, one for MCS and one 537 * for legacy rates. 538 */ 539 if (flags & IEEE80211_F_DOBRS) 540 srs = (const struct ieee80211_rateset *) 541 ieee80211_get_suphtrates(ic, ni->ni_chan); 542 else 543 srs = ieee80211_get_suprates(ic, ni->ni_chan); 544 for (i = 0; i < nrs->rs_nrates; ) { 545 if (flags & IEEE80211_F_DOSORT) { 546 /* 547 * Sort rates. 548 */ 549 for (j = i + 1; j < nrs->rs_nrates; j++) { 550 if (RV(nrs->rs_rates[i]) > RV(nrs->rs_rates[j])) { 551 r = nrs->rs_rates[i]; 552 nrs->rs_rates[i] = nrs->rs_rates[j]; 553 nrs->rs_rates[j] = r; 554 } 555 } 556 } 557 r = nrs->rs_rates[i] & IEEE80211_RATE_VAL; 558 badrate = r; 559 /* 560 * Check for fixed rate. 561 */ 562 if (r == ucastrate) 563 fixedrate = r; 564 /* 565 * Check against supported rates. 566 */ 567 rix = findrix(srs, r); 568 if (flags & IEEE80211_F_DONEGO) { 569 if (rix < 0) { 570 /* 571 * A rate in the node's rate set is not 572 * supported. If this is a basic rate and we 573 * are operating as a STA then this is an error. 574 * Otherwise we just discard/ignore the rate. 575 */ 576 if ((flags & IEEE80211_F_JOIN) && 577 (nrs->rs_rates[i] & IEEE80211_RATE_BASIC)) 578 error++; 579 } else if ((flags & IEEE80211_F_JOIN) == 0) { 580 /* 581 * Overwrite with the supported rate 582 * value so any basic rate bit is set. 583 */ 584 nrs->rs_rates[i] = srs->rs_rates[rix]; 585 } 586 } 587 if ((flags & IEEE80211_F_DODEL) && rix < 0) { 588 /* 589 * Delete unacceptable rates. 590 */ 591 nrs->rs_nrates--; 592 for (j = i; j < nrs->rs_nrates; j++) 593 nrs->rs_rates[j] = nrs->rs_rates[j + 1]; 594 nrs->rs_rates[j] = 0; 595 continue; 596 } 597 if (rix >= 0) 598 okrate = nrs->rs_rates[i]; 599 i++; 600 } 601 if (okrate == 0 || error != 0 || 602 ((flags & (IEEE80211_F_DOFRATE|IEEE80211_F_DOFMCS)) && 603 fixedrate != ucastrate)) { 604 IEEE80211_NOTE(vap, IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni, 605 "%s: flags 0x%x okrate %d error %d fixedrate 0x%x " 606 "ucastrate %x\n", __func__, flags, okrate, error, 607 fixedrate, ucastrate); 608 return badrate | IEEE80211_RATE_BASIC; 609 } else 610 return RV(okrate); 611 #undef RV 612 } 613 614 /* 615 * Reset 11g-related state. 616 */ 617 void 618 ieee80211_reset_erp(struct ieee80211com *ic) 619 { 620 ic->ic_flags &= ~IEEE80211_F_USEPROT; 621 ic->ic_nonerpsta = 0; 622 ic->ic_longslotsta = 0; 623 /* 624 * Short slot time is enabled only when operating in 11g 625 * and not in an IBSS. We must also honor whether or not 626 * the driver is capable of doing it. 627 */ 628 ieee80211_set_shortslottime(ic, 629 IEEE80211_IS_CHAN_A(ic->ic_curchan) || 630 IEEE80211_IS_CHAN_HT(ic->ic_curchan) || 631 (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 632 ic->ic_opmode == IEEE80211_M_HOSTAP && 633 (ic->ic_caps & IEEE80211_C_SHSLOT))); 634 /* 635 * Set short preamble and ERP barker-preamble flags. 636 */ 637 if (IEEE80211_IS_CHAN_A(ic->ic_curchan) || 638 (ic->ic_caps & IEEE80211_C_SHPREAMBLE)) { 639 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 640 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 641 } else { 642 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 643 ic->ic_flags |= IEEE80211_F_USEBARKER; 644 } 645 } 646 647 /* 648 * Set the short slot time state and notify the driver. 649 */ 650 void 651 ieee80211_set_shortslottime(struct ieee80211com *ic, int onoff) 652 { 653 if (onoff) 654 ic->ic_flags |= IEEE80211_F_SHSLOT; 655 else 656 ic->ic_flags &= ~IEEE80211_F_SHSLOT; 657 /* notify driver */ 658 if (ic->ic_updateslot != NULL) 659 ic->ic_updateslot(ic->ic_ifp); 660 } 661 662 /* 663 * Check if the specified rate set supports ERP. 664 * NB: the rate set is assumed to be sorted. 665 */ 666 int 667 ieee80211_iserp_rateset(const struct ieee80211_rateset *rs) 668 { 669 static const int rates[] = { 2, 4, 11, 22, 12, 24, 48 }; 670 int i, j; 671 672 if (rs->rs_nrates < nitems(rates)) 673 return 0; 674 for (i = 0; i < nitems(rates); i++) { 675 for (j = 0; j < rs->rs_nrates; j++) { 676 int r = rs->rs_rates[j] & IEEE80211_RATE_VAL; 677 if (rates[i] == r) 678 goto next; 679 if (r > rates[i]) 680 return 0; 681 } 682 return 0; 683 next: 684 ; 685 } 686 return 1; 687 } 688 689 /* 690 * Mark the basic rates for the rate table based on the 691 * operating mode. For real 11g we mark all the 11b rates 692 * and 6, 12, and 24 OFDM. For 11b compatibility we mark only 693 * 11b rates. There's also a pseudo 11a-mode used to mark only 694 * the basic OFDM rates. 695 */ 696 static void 697 setbasicrates(struct ieee80211_rateset *rs, 698 enum ieee80211_phymode mode, int add) 699 { 700 static const struct ieee80211_rateset basic[IEEE80211_MODE_MAX] = { 701 [IEEE80211_MODE_11A] = { 3, { 12, 24, 48 } }, 702 [IEEE80211_MODE_11B] = { 2, { 2, 4 } }, 703 /* NB: mixed b/g */ 704 [IEEE80211_MODE_11G] = { 4, { 2, 4, 11, 22 } }, 705 [IEEE80211_MODE_TURBO_A] = { 3, { 12, 24, 48 } }, 706 [IEEE80211_MODE_TURBO_G] = { 4, { 2, 4, 11, 22 } }, 707 [IEEE80211_MODE_STURBO_A] = { 3, { 12, 24, 48 } }, 708 [IEEE80211_MODE_HALF] = { 3, { 6, 12, 24 } }, 709 [IEEE80211_MODE_QUARTER] = { 3, { 3, 6, 12 } }, 710 [IEEE80211_MODE_11NA] = { 3, { 12, 24, 48 } }, 711 /* NB: mixed b/g */ 712 [IEEE80211_MODE_11NG] = { 4, { 2, 4, 11, 22 } }, 713 }; 714 int i, j; 715 716 for (i = 0; i < rs->rs_nrates; i++) { 717 if (!add) 718 rs->rs_rates[i] &= IEEE80211_RATE_VAL; 719 for (j = 0; j < basic[mode].rs_nrates; j++) 720 if (basic[mode].rs_rates[j] == rs->rs_rates[i]) { 721 rs->rs_rates[i] |= IEEE80211_RATE_BASIC; 722 break; 723 } 724 } 725 } 726 727 /* 728 * Set the basic rates in a rate set. 729 */ 730 void 731 ieee80211_setbasicrates(struct ieee80211_rateset *rs, 732 enum ieee80211_phymode mode) 733 { 734 setbasicrates(rs, mode, 0); 735 } 736 737 /* 738 * Add basic rates to a rate set. 739 */ 740 void 741 ieee80211_addbasicrates(struct ieee80211_rateset *rs, 742 enum ieee80211_phymode mode) 743 { 744 setbasicrates(rs, mode, 1); 745 } 746 747 /* 748 * WME protocol support. 749 * 750 * The default 11a/b/g/n parameters come from the WiFi Alliance WMM 751 * System Interopability Test Plan (v1.4, Appendix F) and the 802.11n 752 * Draft 2.0 Test Plan (Appendix D). 753 * 754 * Static/Dynamic Turbo mode settings come from Atheros. 755 */ 756 typedef struct phyParamType { 757 uint8_t aifsn; 758 uint8_t logcwmin; 759 uint8_t logcwmax; 760 uint16_t txopLimit; 761 uint8_t acm; 762 } paramType; 763 764 static const struct phyParamType phyParamForAC_BE[IEEE80211_MODE_MAX] = { 765 [IEEE80211_MODE_AUTO] = { 3, 4, 6, 0, 0 }, 766 [IEEE80211_MODE_11A] = { 3, 4, 6, 0, 0 }, 767 [IEEE80211_MODE_11B] = { 3, 4, 6, 0, 0 }, 768 [IEEE80211_MODE_11G] = { 3, 4, 6, 0, 0 }, 769 [IEEE80211_MODE_FH] = { 3, 4, 6, 0, 0 }, 770 [IEEE80211_MODE_TURBO_A]= { 2, 3, 5, 0, 0 }, 771 [IEEE80211_MODE_TURBO_G]= { 2, 3, 5, 0, 0 }, 772 [IEEE80211_MODE_STURBO_A]={ 2, 3, 5, 0, 0 }, 773 [IEEE80211_MODE_HALF] = { 3, 4, 6, 0, 0 }, 774 [IEEE80211_MODE_QUARTER]= { 3, 4, 6, 0, 0 }, 775 [IEEE80211_MODE_11NA] = { 3, 4, 6, 0, 0 }, 776 [IEEE80211_MODE_11NG] = { 3, 4, 6, 0, 0 }, 777 }; 778 static const struct phyParamType phyParamForAC_BK[IEEE80211_MODE_MAX] = { 779 [IEEE80211_MODE_AUTO] = { 7, 4, 10, 0, 0 }, 780 [IEEE80211_MODE_11A] = { 7, 4, 10, 0, 0 }, 781 [IEEE80211_MODE_11B] = { 7, 4, 10, 0, 0 }, 782 [IEEE80211_MODE_11G] = { 7, 4, 10, 0, 0 }, 783 [IEEE80211_MODE_FH] = { 7, 4, 10, 0, 0 }, 784 [IEEE80211_MODE_TURBO_A]= { 7, 3, 10, 0, 0 }, 785 [IEEE80211_MODE_TURBO_G]= { 7, 3, 10, 0, 0 }, 786 [IEEE80211_MODE_STURBO_A]={ 7, 3, 10, 0, 0 }, 787 [IEEE80211_MODE_HALF] = { 7, 4, 10, 0, 0 }, 788 [IEEE80211_MODE_QUARTER]= { 7, 4, 10, 0, 0 }, 789 [IEEE80211_MODE_11NA] = { 7, 4, 10, 0, 0 }, 790 [IEEE80211_MODE_11NG] = { 7, 4, 10, 0, 0 }, 791 }; 792 static const struct phyParamType phyParamForAC_VI[IEEE80211_MODE_MAX] = { 793 [IEEE80211_MODE_AUTO] = { 1, 3, 4, 94, 0 }, 794 [IEEE80211_MODE_11A] = { 1, 3, 4, 94, 0 }, 795 [IEEE80211_MODE_11B] = { 1, 3, 4, 188, 0 }, 796 [IEEE80211_MODE_11G] = { 1, 3, 4, 94, 0 }, 797 [IEEE80211_MODE_FH] = { 1, 3, 4, 188, 0 }, 798 [IEEE80211_MODE_TURBO_A]= { 1, 2, 3, 94, 0 }, 799 [IEEE80211_MODE_TURBO_G]= { 1, 2, 3, 94, 0 }, 800 [IEEE80211_MODE_STURBO_A]={ 1, 2, 3, 94, 0 }, 801 [IEEE80211_MODE_HALF] = { 1, 3, 4, 94, 0 }, 802 [IEEE80211_MODE_QUARTER]= { 1, 3, 4, 94, 0 }, 803 [IEEE80211_MODE_11NA] = { 1, 3, 4, 94, 0 }, 804 [IEEE80211_MODE_11NG] = { 1, 3, 4, 94, 0 }, 805 }; 806 static const struct phyParamType phyParamForAC_VO[IEEE80211_MODE_MAX] = { 807 [IEEE80211_MODE_AUTO] = { 1, 2, 3, 47, 0 }, 808 [IEEE80211_MODE_11A] = { 1, 2, 3, 47, 0 }, 809 [IEEE80211_MODE_11B] = { 1, 2, 3, 102, 0 }, 810 [IEEE80211_MODE_11G] = { 1, 2, 3, 47, 0 }, 811 [IEEE80211_MODE_FH] = { 1, 2, 3, 102, 0 }, 812 [IEEE80211_MODE_TURBO_A]= { 1, 2, 2, 47, 0 }, 813 [IEEE80211_MODE_TURBO_G]= { 1, 2, 2, 47, 0 }, 814 [IEEE80211_MODE_STURBO_A]={ 1, 2, 2, 47, 0 }, 815 [IEEE80211_MODE_HALF] = { 1, 2, 3, 47, 0 }, 816 [IEEE80211_MODE_QUARTER]= { 1, 2, 3, 47, 0 }, 817 [IEEE80211_MODE_11NA] = { 1, 2, 3, 47, 0 }, 818 [IEEE80211_MODE_11NG] = { 1, 2, 3, 47, 0 }, 819 }; 820 821 static const struct phyParamType bssPhyParamForAC_BE[IEEE80211_MODE_MAX] = { 822 [IEEE80211_MODE_AUTO] = { 3, 4, 10, 0, 0 }, 823 [IEEE80211_MODE_11A] = { 3, 4, 10, 0, 0 }, 824 [IEEE80211_MODE_11B] = { 3, 4, 10, 0, 0 }, 825 [IEEE80211_MODE_11G] = { 3, 4, 10, 0, 0 }, 826 [IEEE80211_MODE_FH] = { 3, 4, 10, 0, 0 }, 827 [IEEE80211_MODE_TURBO_A]= { 2, 3, 10, 0, 0 }, 828 [IEEE80211_MODE_TURBO_G]= { 2, 3, 10, 0, 0 }, 829 [IEEE80211_MODE_STURBO_A]={ 2, 3, 10, 0, 0 }, 830 [IEEE80211_MODE_HALF] = { 3, 4, 10, 0, 0 }, 831 [IEEE80211_MODE_QUARTER]= { 3, 4, 10, 0, 0 }, 832 [IEEE80211_MODE_11NA] = { 3, 4, 10, 0, 0 }, 833 [IEEE80211_MODE_11NG] = { 3, 4, 10, 0, 0 }, 834 }; 835 static const struct phyParamType bssPhyParamForAC_VI[IEEE80211_MODE_MAX] = { 836 [IEEE80211_MODE_AUTO] = { 2, 3, 4, 94, 0 }, 837 [IEEE80211_MODE_11A] = { 2, 3, 4, 94, 0 }, 838 [IEEE80211_MODE_11B] = { 2, 3, 4, 188, 0 }, 839 [IEEE80211_MODE_11G] = { 2, 3, 4, 94, 0 }, 840 [IEEE80211_MODE_FH] = { 2, 3, 4, 188, 0 }, 841 [IEEE80211_MODE_TURBO_A]= { 2, 2, 3, 94, 0 }, 842 [IEEE80211_MODE_TURBO_G]= { 2, 2, 3, 94, 0 }, 843 [IEEE80211_MODE_STURBO_A]={ 2, 2, 3, 94, 0 }, 844 [IEEE80211_MODE_HALF] = { 2, 3, 4, 94, 0 }, 845 [IEEE80211_MODE_QUARTER]= { 2, 3, 4, 94, 0 }, 846 [IEEE80211_MODE_11NA] = { 2, 3, 4, 94, 0 }, 847 [IEEE80211_MODE_11NG] = { 2, 3, 4, 94, 0 }, 848 }; 849 static const struct phyParamType bssPhyParamForAC_VO[IEEE80211_MODE_MAX] = { 850 [IEEE80211_MODE_AUTO] = { 2, 2, 3, 47, 0 }, 851 [IEEE80211_MODE_11A] = { 2, 2, 3, 47, 0 }, 852 [IEEE80211_MODE_11B] = { 2, 2, 3, 102, 0 }, 853 [IEEE80211_MODE_11G] = { 2, 2, 3, 47, 0 }, 854 [IEEE80211_MODE_FH] = { 2, 2, 3, 102, 0 }, 855 [IEEE80211_MODE_TURBO_A]= { 1, 2, 2, 47, 0 }, 856 [IEEE80211_MODE_TURBO_G]= { 1, 2, 2, 47, 0 }, 857 [IEEE80211_MODE_STURBO_A]={ 1, 2, 2, 47, 0 }, 858 [IEEE80211_MODE_HALF] = { 2, 2, 3, 47, 0 }, 859 [IEEE80211_MODE_QUARTER]= { 2, 2, 3, 47, 0 }, 860 [IEEE80211_MODE_11NA] = { 2, 2, 3, 47, 0 }, 861 [IEEE80211_MODE_11NG] = { 2, 2, 3, 47, 0 }, 862 }; 863 864 static void 865 _setifsparams(struct wmeParams *wmep, const paramType *phy) 866 { 867 wmep->wmep_aifsn = phy->aifsn; 868 wmep->wmep_logcwmin = phy->logcwmin; 869 wmep->wmep_logcwmax = phy->logcwmax; 870 wmep->wmep_txopLimit = phy->txopLimit; 871 } 872 873 static void 874 setwmeparams(struct ieee80211vap *vap, const char *type, int ac, 875 struct wmeParams *wmep, const paramType *phy) 876 { 877 wmep->wmep_acm = phy->acm; 878 _setifsparams(wmep, phy); 879 880 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 881 "set %s (%s) [acm %u aifsn %u logcwmin %u logcwmax %u txop %u]\n", 882 ieee80211_wme_acnames[ac], type, 883 wmep->wmep_acm, wmep->wmep_aifsn, wmep->wmep_logcwmin, 884 wmep->wmep_logcwmax, wmep->wmep_txopLimit); 885 } 886 887 static void 888 ieee80211_wme_initparams_locked(struct ieee80211vap *vap) 889 { 890 struct ieee80211com *ic = vap->iv_ic; 891 struct ieee80211_wme_state *wme = &ic->ic_wme; 892 const paramType *pPhyParam, *pBssPhyParam; 893 struct wmeParams *wmep; 894 enum ieee80211_phymode mode; 895 int i; 896 897 IEEE80211_LOCK_ASSERT(ic); 898 899 if ((ic->ic_caps & IEEE80211_C_WME) == 0 || ic->ic_nrunning > 1) 900 return; 901 902 /* 903 * Clear the wme cap_info field so a qoscount from a previous 904 * vap doesn't confuse later code which only parses the beacon 905 * field and updates hardware when said field changes. 906 * Otherwise the hardware is programmed with defaults, not what 907 * the beacon actually announces. 908 */ 909 wme->wme_wmeChanParams.cap_info = 0; 910 911 /* 912 * Select mode; we can be called early in which case we 913 * always use auto mode. We know we'll be called when 914 * entering the RUN state with bsschan setup properly 915 * so state will eventually get set correctly 916 */ 917 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC) 918 mode = ieee80211_chan2mode(ic->ic_bsschan); 919 else 920 mode = IEEE80211_MODE_AUTO; 921 for (i = 0; i < WME_NUM_AC; i++) { 922 switch (i) { 923 case WME_AC_BK: 924 pPhyParam = &phyParamForAC_BK[mode]; 925 pBssPhyParam = &phyParamForAC_BK[mode]; 926 break; 927 case WME_AC_VI: 928 pPhyParam = &phyParamForAC_VI[mode]; 929 pBssPhyParam = &bssPhyParamForAC_VI[mode]; 930 break; 931 case WME_AC_VO: 932 pPhyParam = &phyParamForAC_VO[mode]; 933 pBssPhyParam = &bssPhyParamForAC_VO[mode]; 934 break; 935 case WME_AC_BE: 936 default: 937 pPhyParam = &phyParamForAC_BE[mode]; 938 pBssPhyParam = &bssPhyParamForAC_BE[mode]; 939 break; 940 } 941 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i]; 942 if (ic->ic_opmode == IEEE80211_M_HOSTAP) { 943 setwmeparams(vap, "chan", i, wmep, pPhyParam); 944 } else { 945 setwmeparams(vap, "chan", i, wmep, pBssPhyParam); 946 } 947 wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i]; 948 setwmeparams(vap, "bss ", i, wmep, pBssPhyParam); 949 } 950 /* NB: check ic_bss to avoid NULL deref on initial attach */ 951 if (vap->iv_bss != NULL) { 952 /* 953 * Calculate agressive mode switching threshold based 954 * on beacon interval. This doesn't need locking since 955 * we're only called before entering the RUN state at 956 * which point we start sending beacon frames. 957 */ 958 wme->wme_hipri_switch_thresh = 959 (HIGH_PRI_SWITCH_THRESH * vap->iv_bss->ni_intval) / 100; 960 wme->wme_flags &= ~WME_F_AGGRMODE; 961 ieee80211_wme_updateparams(vap); 962 } 963 } 964 965 void 966 ieee80211_wme_initparams(struct ieee80211vap *vap) 967 { 968 struct ieee80211com *ic = vap->iv_ic; 969 970 IEEE80211_LOCK(ic); 971 ieee80211_wme_initparams_locked(vap); 972 IEEE80211_UNLOCK(ic); 973 } 974 975 /* 976 * Update WME parameters for ourself and the BSS. 977 */ 978 void 979 ieee80211_wme_updateparams_locked(struct ieee80211vap *vap) 980 { 981 static const paramType aggrParam[IEEE80211_MODE_MAX] = { 982 [IEEE80211_MODE_AUTO] = { 2, 4, 10, 64, 0 }, 983 [IEEE80211_MODE_11A] = { 2, 4, 10, 64, 0 }, 984 [IEEE80211_MODE_11B] = { 2, 5, 10, 64, 0 }, 985 [IEEE80211_MODE_11G] = { 2, 4, 10, 64, 0 }, 986 [IEEE80211_MODE_FH] = { 2, 5, 10, 64, 0 }, 987 [IEEE80211_MODE_TURBO_A] = { 1, 3, 10, 64, 0 }, 988 [IEEE80211_MODE_TURBO_G] = { 1, 3, 10, 64, 0 }, 989 [IEEE80211_MODE_STURBO_A] = { 1, 3, 10, 64, 0 }, 990 [IEEE80211_MODE_HALF] = { 2, 4, 10, 64, 0 }, 991 [IEEE80211_MODE_QUARTER] = { 2, 4, 10, 64, 0 }, 992 [IEEE80211_MODE_11NA] = { 2, 4, 10, 64, 0 }, /* XXXcheck*/ 993 [IEEE80211_MODE_11NG] = { 2, 4, 10, 64, 0 }, /* XXXcheck*/ 994 }; 995 struct ieee80211com *ic = vap->iv_ic; 996 struct ieee80211_wme_state *wme = &ic->ic_wme; 997 const struct wmeParams *wmep; 998 struct wmeParams *chanp, *bssp; 999 enum ieee80211_phymode mode; 1000 int i; 1001 int do_aggrmode = 0; 1002 1003 /* 1004 * Set up the channel access parameters for the physical 1005 * device. First populate the configured settings. 1006 */ 1007 for (i = 0; i < WME_NUM_AC; i++) { 1008 chanp = &wme->wme_chanParams.cap_wmeParams[i]; 1009 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i]; 1010 chanp->wmep_aifsn = wmep->wmep_aifsn; 1011 chanp->wmep_logcwmin = wmep->wmep_logcwmin; 1012 chanp->wmep_logcwmax = wmep->wmep_logcwmax; 1013 chanp->wmep_txopLimit = wmep->wmep_txopLimit; 1014 1015 chanp = &wme->wme_bssChanParams.cap_wmeParams[i]; 1016 wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i]; 1017 chanp->wmep_aifsn = wmep->wmep_aifsn; 1018 chanp->wmep_logcwmin = wmep->wmep_logcwmin; 1019 chanp->wmep_logcwmax = wmep->wmep_logcwmax; 1020 chanp->wmep_txopLimit = wmep->wmep_txopLimit; 1021 } 1022 1023 /* 1024 * Select mode; we can be called early in which case we 1025 * always use auto mode. We know we'll be called when 1026 * entering the RUN state with bsschan setup properly 1027 * so state will eventually get set correctly 1028 */ 1029 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC) 1030 mode = ieee80211_chan2mode(ic->ic_bsschan); 1031 else 1032 mode = IEEE80211_MODE_AUTO; 1033 1034 /* 1035 * This implements agressive mode as found in certain 1036 * vendors' AP's. When there is significant high 1037 * priority (VI/VO) traffic in the BSS throttle back BE 1038 * traffic by using conservative parameters. Otherwise 1039 * BE uses agressive params to optimize performance of 1040 * legacy/non-QoS traffic. 1041 */ 1042 1043 /* Hostap? Only if aggressive mode is enabled */ 1044 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 1045 (wme->wme_flags & WME_F_AGGRMODE) != 0) 1046 do_aggrmode = 1; 1047 1048 /* 1049 * Station? Only if we're in a non-QoS BSS. 1050 */ 1051 else if ((vap->iv_opmode == IEEE80211_M_STA && 1052 (vap->iv_bss->ni_flags & IEEE80211_NODE_QOS) == 0)) 1053 do_aggrmode = 1; 1054 1055 /* 1056 * IBSS? Only if we we have WME enabled. 1057 */ 1058 else if ((vap->iv_opmode == IEEE80211_M_IBSS) && 1059 (vap->iv_flags & IEEE80211_F_WME)) 1060 do_aggrmode = 1; 1061 1062 /* 1063 * If WME is disabled on this VAP, default to aggressive mode 1064 * regardless of the configuration. 1065 */ 1066 if ((vap->iv_flags & IEEE80211_F_WME) == 0) 1067 do_aggrmode = 1; 1068 1069 /* XXX WDS? */ 1070 1071 /* XXX MBSS? */ 1072 1073 if (do_aggrmode) { 1074 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE]; 1075 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE]; 1076 1077 chanp->wmep_aifsn = bssp->wmep_aifsn = aggrParam[mode].aifsn; 1078 chanp->wmep_logcwmin = bssp->wmep_logcwmin = 1079 aggrParam[mode].logcwmin; 1080 chanp->wmep_logcwmax = bssp->wmep_logcwmax = 1081 aggrParam[mode].logcwmax; 1082 chanp->wmep_txopLimit = bssp->wmep_txopLimit = 1083 (vap->iv_flags & IEEE80211_F_BURST) ? 1084 aggrParam[mode].txopLimit : 0; 1085 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 1086 "update %s (chan+bss) [acm %u aifsn %u logcwmin %u " 1087 "logcwmax %u txop %u]\n", ieee80211_wme_acnames[WME_AC_BE], 1088 chanp->wmep_acm, chanp->wmep_aifsn, chanp->wmep_logcwmin, 1089 chanp->wmep_logcwmax, chanp->wmep_txopLimit); 1090 } 1091 1092 1093 /* 1094 * Change the contention window based on the number of associated 1095 * stations. If the number of associated stations is 1 and 1096 * aggressive mode is enabled, lower the contention window even 1097 * further. 1098 */ 1099 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 1100 ic->ic_sta_assoc < 2 && (wme->wme_flags & WME_F_AGGRMODE) != 0) { 1101 static const uint8_t logCwMin[IEEE80211_MODE_MAX] = { 1102 [IEEE80211_MODE_AUTO] = 3, 1103 [IEEE80211_MODE_11A] = 3, 1104 [IEEE80211_MODE_11B] = 4, 1105 [IEEE80211_MODE_11G] = 3, 1106 [IEEE80211_MODE_FH] = 4, 1107 [IEEE80211_MODE_TURBO_A] = 3, 1108 [IEEE80211_MODE_TURBO_G] = 3, 1109 [IEEE80211_MODE_STURBO_A] = 3, 1110 [IEEE80211_MODE_HALF] = 3, 1111 [IEEE80211_MODE_QUARTER] = 3, 1112 [IEEE80211_MODE_11NA] = 3, 1113 [IEEE80211_MODE_11NG] = 3, 1114 }; 1115 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE]; 1116 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE]; 1117 1118 chanp->wmep_logcwmin = bssp->wmep_logcwmin = logCwMin[mode]; 1119 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 1120 "update %s (chan+bss) logcwmin %u\n", 1121 ieee80211_wme_acnames[WME_AC_BE], chanp->wmep_logcwmin); 1122 } 1123 1124 /* 1125 * Arrange for the beacon update. 1126 * 1127 * XXX what about MBSS, WDS? 1128 */ 1129 if (vap->iv_opmode == IEEE80211_M_HOSTAP 1130 || vap->iv_opmode == IEEE80211_M_IBSS) { 1131 /* 1132 * Arrange for a beacon update and bump the parameter 1133 * set number so associated stations load the new values. 1134 */ 1135 wme->wme_bssChanParams.cap_info = 1136 (wme->wme_bssChanParams.cap_info+1) & WME_QOSINFO_COUNT; 1137 ieee80211_beacon_notify(vap, IEEE80211_BEACON_WME); 1138 } 1139 1140 wme->wme_update(ic); 1141 1142 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 1143 "%s: WME params updated, cap_info 0x%x\n", __func__, 1144 vap->iv_opmode == IEEE80211_M_STA ? 1145 wme->wme_wmeChanParams.cap_info : 1146 wme->wme_bssChanParams.cap_info); 1147 } 1148 1149 void 1150 ieee80211_wme_updateparams(struct ieee80211vap *vap) 1151 { 1152 struct ieee80211com *ic = vap->iv_ic; 1153 1154 if (ic->ic_caps & IEEE80211_C_WME) { 1155 IEEE80211_LOCK(ic); 1156 ieee80211_wme_updateparams_locked(vap); 1157 IEEE80211_UNLOCK(ic); 1158 } 1159 } 1160 1161 static void 1162 parent_updown(void *arg, int npending) 1163 { 1164 struct ifnet *parent = arg; 1165 1166 #if defined(__DragonFly__) 1167 int wst; 1168 1169 wst = wlan_serialize_push(); 1170 parent->if_ioctl(parent, SIOCSIFFLAGS, NULL, NULL); 1171 wlan_serialize_pop(wst); 1172 #else 1173 parent->if_ioctl(parent, SIOCSIFFLAGS, NULL); 1174 #endif 1175 } 1176 1177 static void 1178 update_mcast(void *arg, int npending) 1179 { 1180 struct ieee80211com *ic = arg; 1181 struct ifnet *parent = ic->ic_ifp; 1182 1183 ic->ic_update_mcast(parent); 1184 } 1185 1186 static void 1187 update_promisc(void *arg, int npending) 1188 { 1189 struct ieee80211com *ic = arg; 1190 struct ifnet *parent = ic->ic_ifp; 1191 1192 ic->ic_update_promisc(parent); 1193 } 1194 1195 static void 1196 update_channel(void *arg, int npending) 1197 { 1198 struct ieee80211com *ic = arg; 1199 1200 ic->ic_set_channel(ic); 1201 ieee80211_radiotap_chan_change(ic); 1202 } 1203 1204 static void 1205 update_chw(void *arg, int npending) 1206 { 1207 struct ieee80211com *ic = arg; 1208 1209 /* 1210 * XXX should we defer the channel width _config_ update until now? 1211 */ 1212 ic->ic_update_chw(ic); 1213 } 1214 1215 /* 1216 * Block until the parent is in a known state. This is 1217 * used after any operations that dispatch a task (e.g. 1218 * to auto-configure the parent device up/down). 1219 */ 1220 void 1221 ieee80211_waitfor_parent(struct ieee80211com *ic) 1222 { 1223 taskqueue_block(ic->ic_tq); 1224 ieee80211_draintask(ic, &ic->ic_parent_task); 1225 ieee80211_draintask(ic, &ic->ic_mcast_task); 1226 ieee80211_draintask(ic, &ic->ic_promisc_task); 1227 ieee80211_draintask(ic, &ic->ic_chan_task); 1228 ieee80211_draintask(ic, &ic->ic_bmiss_task); 1229 ieee80211_draintask(ic, &ic->ic_chw_task); 1230 taskqueue_unblock(ic->ic_tq); 1231 } 1232 1233 /* 1234 * Start a vap running. If this is the first vap to be 1235 * set running on the underlying device then we 1236 * automatically bring the device up. 1237 */ 1238 void 1239 ieee80211_start_locked(struct ieee80211vap *vap) 1240 { 1241 struct ifnet *ifp = vap->iv_ifp; 1242 struct ieee80211com *ic = vap->iv_ic; 1243 struct ifnet *parent = ic->ic_ifp; 1244 1245 IEEE80211_LOCK_ASSERT(ic); 1246 1247 IEEE80211_DPRINTF(vap, 1248 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1249 "start running, %d vaps running\n", ic->ic_nrunning); 1250 1251 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) { 1252 /* 1253 * Mark us running. Note that it's ok to do this first; 1254 * if we need to bring the parent device up we defer that 1255 * to avoid dropping the com lock. We expect the device 1256 * to respond to being marked up by calling back into us 1257 * through ieee80211_start_all at which point we'll come 1258 * back in here and complete the work. 1259 */ 1260 ifp->if_drv_flags |= IFF_DRV_RUNNING; 1261 /* 1262 * We are not running; if this we are the first vap 1263 * to be brought up auto-up the parent if necessary. 1264 */ 1265 if (ic->ic_nrunning++ == 0 && 1266 (parent->if_drv_flags & IFF_DRV_RUNNING) == 0) { 1267 IEEE80211_DPRINTF(vap, 1268 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1269 "%s: up parent %s\n", __func__, parent->if_xname); 1270 parent->if_flags |= IFF_UP; 1271 ieee80211_runtask(ic, &ic->ic_parent_task); 1272 return; 1273 } 1274 } 1275 /* 1276 * If the parent is up and running, then kick the 1277 * 802.11 state machine as appropriate. 1278 */ 1279 if ((parent->if_drv_flags & IFF_DRV_RUNNING) && 1280 vap->iv_roaming != IEEE80211_ROAMING_MANUAL) { 1281 if (vap->iv_opmode == IEEE80211_M_STA) { 1282 #if 0 1283 /* XXX bypasses scan too easily; disable for now */ 1284 /* 1285 * Try to be intelligent about clocking the state 1286 * machine. If we're currently in RUN state then 1287 * we should be able to apply any new state/parameters 1288 * simply by re-associating. Otherwise we need to 1289 * re-scan to select an appropriate ap. 1290 */ 1291 if (vap->iv_state >= IEEE80211_S_RUN) 1292 ieee80211_new_state_locked(vap, 1293 IEEE80211_S_ASSOC, 1); 1294 else 1295 #endif 1296 ieee80211_new_state_locked(vap, 1297 IEEE80211_S_SCAN, 0); 1298 } else { 1299 /* 1300 * For monitor+wds mode there's nothing to do but 1301 * start running. Otherwise if this is the first 1302 * vap to be brought up, start a scan which may be 1303 * preempted if the station is locked to a particular 1304 * channel. 1305 */ 1306 vap->iv_flags_ext |= IEEE80211_FEXT_REINIT; 1307 if (vap->iv_opmode == IEEE80211_M_MONITOR || 1308 vap->iv_opmode == IEEE80211_M_WDS) 1309 ieee80211_new_state_locked(vap, 1310 IEEE80211_S_RUN, -1); 1311 else 1312 ieee80211_new_state_locked(vap, 1313 IEEE80211_S_SCAN, 0); 1314 } 1315 } 1316 } 1317 1318 /* 1319 * Start a single vap. 1320 */ 1321 void 1322 ieee80211_init(void *arg) 1323 { 1324 struct ieee80211vap *vap = arg; 1325 1326 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1327 "%s\n", __func__); 1328 1329 IEEE80211_LOCK(vap->iv_ic); 1330 ieee80211_start_locked(vap); 1331 IEEE80211_UNLOCK(vap->iv_ic); 1332 } 1333 1334 /* 1335 * Start all runnable vap's on a device. 1336 */ 1337 void 1338 ieee80211_start_all(struct ieee80211com *ic) 1339 { 1340 struct ieee80211vap *vap; 1341 1342 IEEE80211_LOCK(ic); 1343 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1344 struct ifnet *ifp = vap->iv_ifp; 1345 if (IFNET_IS_UP_RUNNING(ifp)) /* NB: avoid recursion */ 1346 ieee80211_start_locked(vap); 1347 } 1348 IEEE80211_UNLOCK(ic); 1349 } 1350 1351 /* 1352 * Stop a vap. We force it down using the state machine 1353 * then mark it's ifnet not running. If this is the last 1354 * vap running on the underlying device then we close it 1355 * too to insure it will be properly initialized when the 1356 * next vap is brought up. 1357 */ 1358 void 1359 ieee80211_stop_locked(struct ieee80211vap *vap) 1360 { 1361 struct ieee80211com *ic = vap->iv_ic; 1362 struct ifnet *ifp = vap->iv_ifp; 1363 struct ifnet *parent = ic->ic_ifp; 1364 1365 IEEE80211_LOCK_ASSERT(ic); 1366 1367 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1368 "stop running, %d vaps running\n", ic->ic_nrunning); 1369 1370 ieee80211_new_state_locked(vap, IEEE80211_S_INIT, -1); 1371 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 1372 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; /* mark us stopped */ 1373 if (--ic->ic_nrunning == 0 && 1374 (parent->if_drv_flags & IFF_DRV_RUNNING)) { 1375 IEEE80211_DPRINTF(vap, 1376 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1377 "down parent %s\n", parent->if_xname); 1378 parent->if_flags &= ~IFF_UP; 1379 ieee80211_runtask(ic, &ic->ic_parent_task); 1380 } 1381 } 1382 } 1383 1384 void 1385 ieee80211_stop(struct ieee80211vap *vap) 1386 { 1387 struct ieee80211com *ic = vap->iv_ic; 1388 1389 IEEE80211_LOCK(ic); 1390 ieee80211_stop_locked(vap); 1391 IEEE80211_UNLOCK(ic); 1392 } 1393 1394 /* 1395 * Stop all vap's running on a device. 1396 */ 1397 void 1398 ieee80211_stop_all(struct ieee80211com *ic) 1399 { 1400 struct ieee80211vap *vap; 1401 1402 IEEE80211_LOCK(ic); 1403 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1404 struct ifnet *ifp = vap->iv_ifp; 1405 if (IFNET_IS_UP_RUNNING(ifp)) /* NB: avoid recursion */ 1406 ieee80211_stop_locked(vap); 1407 } 1408 IEEE80211_UNLOCK(ic); 1409 1410 ieee80211_waitfor_parent(ic); 1411 } 1412 1413 /* 1414 * Stop all vap's running on a device and arrange 1415 * for those that were running to be resumed. 1416 */ 1417 void 1418 ieee80211_suspend_all(struct ieee80211com *ic) 1419 { 1420 struct ieee80211vap *vap; 1421 1422 IEEE80211_LOCK(ic); 1423 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1424 struct ifnet *ifp = vap->iv_ifp; 1425 if (IFNET_IS_UP_RUNNING(ifp)) { /* NB: avoid recursion */ 1426 vap->iv_flags_ext |= IEEE80211_FEXT_RESUME; 1427 ieee80211_stop_locked(vap); 1428 } 1429 } 1430 IEEE80211_UNLOCK(ic); 1431 1432 ieee80211_waitfor_parent(ic); 1433 } 1434 1435 /* 1436 * Start all vap's marked for resume. 1437 */ 1438 void 1439 ieee80211_resume_all(struct ieee80211com *ic) 1440 { 1441 struct ieee80211vap *vap; 1442 1443 IEEE80211_LOCK(ic); 1444 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1445 struct ifnet *ifp = vap->iv_ifp; 1446 if (!IFNET_IS_UP_RUNNING(ifp) && 1447 (vap->iv_flags_ext & IEEE80211_FEXT_RESUME)) { 1448 vap->iv_flags_ext &= ~IEEE80211_FEXT_RESUME; 1449 ieee80211_start_locked(vap); 1450 } 1451 } 1452 IEEE80211_UNLOCK(ic); 1453 } 1454 1455 void 1456 ieee80211_beacon_miss(struct ieee80211com *ic) 1457 { 1458 IEEE80211_LOCK(ic); 1459 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 1460 /* Process in a taskq, the handler may reenter the driver */ 1461 ieee80211_runtask(ic, &ic->ic_bmiss_task); 1462 } 1463 IEEE80211_UNLOCK(ic); 1464 } 1465 1466 static void 1467 beacon_miss(void *arg, int npending) 1468 { 1469 struct ieee80211com *ic = arg; 1470 struct ieee80211vap *vap; 1471 1472 IEEE80211_LOCK(ic); 1473 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1474 /* 1475 * We only pass events through for sta vap's in RUN state; 1476 * may be too restrictive but for now this saves all the 1477 * handlers duplicating these checks. 1478 */ 1479 if (vap->iv_opmode == IEEE80211_M_STA && 1480 vap->iv_state >= IEEE80211_S_RUN && 1481 vap->iv_bmiss != NULL) 1482 vap->iv_bmiss(vap); 1483 } 1484 IEEE80211_UNLOCK(ic); 1485 } 1486 1487 static void 1488 beacon_swmiss(void *arg, int npending) 1489 { 1490 struct ieee80211vap *vap = arg; 1491 struct ieee80211com *ic = vap->iv_ic; 1492 1493 IEEE80211_LOCK(ic); 1494 if (vap->iv_state == IEEE80211_S_RUN) { 1495 /* XXX Call multiple times if npending > zero? */ 1496 vap->iv_bmiss(vap); 1497 } 1498 IEEE80211_UNLOCK(ic); 1499 } 1500 1501 /* 1502 * Software beacon miss handling. Check if any beacons 1503 * were received in the last period. If not post a 1504 * beacon miss; otherwise reset the counter. 1505 */ 1506 void 1507 ieee80211_swbmiss(void *arg) 1508 { 1509 struct ieee80211vap *vap = arg; 1510 struct ieee80211com *ic = vap->iv_ic; 1511 1512 IEEE80211_LOCK_ASSERT(ic); 1513 1514 /* XXX sleep state? */ 1515 KASSERT(vap->iv_state == IEEE80211_S_RUN, 1516 ("wrong state %d", vap->iv_state)); 1517 1518 if (ic->ic_flags & IEEE80211_F_SCAN) { 1519 /* 1520 * If scanning just ignore and reset state. If we get a 1521 * bmiss after coming out of scan because we haven't had 1522 * time to receive a beacon then we should probe the AP 1523 * before posting a real bmiss (unless iv_bmiss_max has 1524 * been artifiically lowered). A cleaner solution might 1525 * be to disable the timer on scan start/end but to handle 1526 * case of multiple sta vap's we'd need to disable the 1527 * timers of all affected vap's. 1528 */ 1529 vap->iv_swbmiss_count = 0; 1530 } else if (vap->iv_swbmiss_count == 0) { 1531 if (vap->iv_bmiss != NULL) 1532 ieee80211_runtask(ic, &vap->iv_swbmiss_task); 1533 } else 1534 vap->iv_swbmiss_count = 0; 1535 callout_reset(&vap->iv_swbmiss, vap->iv_swbmiss_period, 1536 ieee80211_swbmiss, vap); 1537 } 1538 1539 /* 1540 * Start an 802.11h channel switch. We record the parameters, 1541 * mark the operation pending, notify each vap through the 1542 * beacon update mechanism so it can update the beacon frame 1543 * contents, and then switch vap's to CSA state to block outbound 1544 * traffic. Devices that handle CSA directly can use the state 1545 * switch to do the right thing so long as they call 1546 * ieee80211_csa_completeswitch when it's time to complete the 1547 * channel change. Devices that depend on the net80211 layer can 1548 * use ieee80211_beacon_update to handle the countdown and the 1549 * channel switch. 1550 */ 1551 void 1552 ieee80211_csa_startswitch(struct ieee80211com *ic, 1553 struct ieee80211_channel *c, int mode, int count) 1554 { 1555 struct ieee80211vap *vap; 1556 1557 IEEE80211_LOCK_ASSERT(ic); 1558 1559 ic->ic_csa_newchan = c; 1560 ic->ic_csa_mode = mode; 1561 ic->ic_csa_count = count; 1562 ic->ic_flags |= IEEE80211_F_CSAPENDING; 1563 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1564 if (vap->iv_opmode == IEEE80211_M_HOSTAP || 1565 vap->iv_opmode == IEEE80211_M_IBSS || 1566 vap->iv_opmode == IEEE80211_M_MBSS) 1567 ieee80211_beacon_notify(vap, IEEE80211_BEACON_CSA); 1568 /* switch to CSA state to block outbound traffic */ 1569 if (vap->iv_state == IEEE80211_S_RUN) 1570 ieee80211_new_state_locked(vap, IEEE80211_S_CSA, 0); 1571 } 1572 ieee80211_notify_csa(ic, c, mode, count); 1573 } 1574 1575 /* 1576 * Complete the channel switch by transitioning all CSA VAPs to RUN. 1577 * This is called by both the completion and cancellation functions 1578 * so each VAP is placed back in the RUN state and can thus transmit. 1579 */ 1580 static void 1581 csa_completeswitch(struct ieee80211com *ic) 1582 { 1583 struct ieee80211vap *vap; 1584 1585 ic->ic_csa_newchan = NULL; 1586 ic->ic_flags &= ~IEEE80211_F_CSAPENDING; 1587 1588 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1589 if (vap->iv_state == IEEE80211_S_CSA) 1590 ieee80211_new_state_locked(vap, IEEE80211_S_RUN, 0); 1591 } 1592 1593 /* 1594 * Complete an 802.11h channel switch started by ieee80211_csa_startswitch. 1595 * We clear state and move all vap's in CSA state to RUN state 1596 * so they can again transmit. 1597 * 1598 * Although this may not be completely correct, update the BSS channel 1599 * for each VAP to the newly configured channel. The setcurchan sets 1600 * the current operating channel for the interface (so the radio does 1601 * switch over) but the VAP BSS isn't updated, leading to incorrectly 1602 * reported information via ioctl. 1603 */ 1604 void 1605 ieee80211_csa_completeswitch(struct ieee80211com *ic) 1606 { 1607 struct ieee80211vap *vap; 1608 1609 IEEE80211_LOCK_ASSERT(ic); 1610 1611 KASSERT(ic->ic_flags & IEEE80211_F_CSAPENDING, ("csa not pending")); 1612 1613 ieee80211_setcurchan(ic, ic->ic_csa_newchan); 1614 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1615 if (vap->iv_state == IEEE80211_S_CSA) 1616 vap->iv_bss->ni_chan = ic->ic_curchan; 1617 1618 csa_completeswitch(ic); 1619 } 1620 1621 /* 1622 * Cancel an 802.11h channel switch started by ieee80211_csa_startswitch. 1623 * We clear state and move all vap's in CSA state to RUN state 1624 * so they can again transmit. 1625 */ 1626 void 1627 ieee80211_csa_cancelswitch(struct ieee80211com *ic) 1628 { 1629 IEEE80211_LOCK_ASSERT(ic); 1630 1631 csa_completeswitch(ic); 1632 } 1633 1634 /* 1635 * Complete a DFS CAC started by ieee80211_dfs_cac_start. 1636 * We clear state and move all vap's in CAC state to RUN state. 1637 */ 1638 void 1639 ieee80211_cac_completeswitch(struct ieee80211vap *vap0) 1640 { 1641 struct ieee80211com *ic = vap0->iv_ic; 1642 struct ieee80211vap *vap; 1643 1644 IEEE80211_LOCK(ic); 1645 /* 1646 * Complete CAC state change for lead vap first; then 1647 * clock all the other vap's waiting. 1648 */ 1649 KASSERT(vap0->iv_state == IEEE80211_S_CAC, 1650 ("wrong state %d", vap0->iv_state)); 1651 ieee80211_new_state_locked(vap0, IEEE80211_S_RUN, 0); 1652 1653 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1654 if (vap->iv_state == IEEE80211_S_CAC) 1655 ieee80211_new_state_locked(vap, IEEE80211_S_RUN, 0); 1656 IEEE80211_UNLOCK(ic); 1657 } 1658 1659 /* 1660 * Force all vap's other than the specified vap to the INIT state 1661 * and mark them as waiting for a scan to complete. These vaps 1662 * will be brought up when the scan completes and the scanning vap 1663 * reaches RUN state by wakeupwaiting. 1664 */ 1665 static void 1666 markwaiting(struct ieee80211vap *vap0) 1667 { 1668 struct ieee80211com *ic = vap0->iv_ic; 1669 struct ieee80211vap *vap; 1670 1671 IEEE80211_LOCK_ASSERT(ic); 1672 1673 /* 1674 * A vap list entry can not disappear since we are running on the 1675 * taskqueue and a vap destroy will queue and drain another state 1676 * change task. 1677 */ 1678 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1679 if (vap == vap0) 1680 continue; 1681 if (vap->iv_state != IEEE80211_S_INIT) { 1682 /* NB: iv_newstate may drop the lock */ 1683 vap->iv_newstate(vap, IEEE80211_S_INIT, 0); 1684 IEEE80211_LOCK_ASSERT(ic); 1685 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT; 1686 } 1687 } 1688 } 1689 1690 /* 1691 * Wakeup all vap's waiting for a scan to complete. This is the 1692 * companion to markwaiting (above) and is used to coordinate 1693 * multiple vaps scanning. 1694 * This is called from the state taskqueue. 1695 */ 1696 static void 1697 wakeupwaiting(struct ieee80211vap *vap0) 1698 { 1699 struct ieee80211com *ic = vap0->iv_ic; 1700 struct ieee80211vap *vap; 1701 1702 IEEE80211_LOCK_ASSERT(ic); 1703 1704 /* 1705 * A vap list entry can not disappear since we are running on the 1706 * taskqueue and a vap destroy will queue and drain another state 1707 * change task. 1708 */ 1709 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1710 if (vap == vap0) 1711 continue; 1712 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANWAIT) { 1713 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANWAIT; 1714 /* NB: sta's cannot go INIT->RUN */ 1715 /* NB: iv_newstate may drop the lock */ 1716 vap->iv_newstate(vap, 1717 vap->iv_opmode == IEEE80211_M_STA ? 1718 IEEE80211_S_SCAN : IEEE80211_S_RUN, 0); 1719 IEEE80211_LOCK_ASSERT(ic); 1720 } 1721 } 1722 } 1723 1724 /* 1725 * Handle post state change work common to all operating modes. 1726 */ 1727 static void 1728 ieee80211_newstate_cb(void *xvap, int npending) 1729 { 1730 struct ieee80211vap *vap = xvap; 1731 struct ieee80211com *ic = vap->iv_ic; 1732 enum ieee80211_state nstate, ostate; 1733 int arg, rc; 1734 1735 IEEE80211_LOCK(ic); 1736 nstate = vap->iv_nstate; 1737 arg = vap->iv_nstate_arg; 1738 1739 if (vap->iv_flags_ext & IEEE80211_FEXT_REINIT) { 1740 /* 1741 * We have been requested to drop back to the INIT before 1742 * proceeding to the new state. 1743 */ 1744 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1745 "%s: %s -> %s arg %d\n", __func__, 1746 ieee80211_state_name[vap->iv_state], 1747 ieee80211_state_name[IEEE80211_S_INIT], arg); 1748 vap->iv_newstate(vap, IEEE80211_S_INIT, arg); 1749 IEEE80211_LOCK_ASSERT(ic); 1750 vap->iv_flags_ext &= ~IEEE80211_FEXT_REINIT; 1751 } 1752 1753 ostate = vap->iv_state; 1754 if (nstate == IEEE80211_S_SCAN && ostate != IEEE80211_S_INIT) { 1755 /* 1756 * SCAN was forced; e.g. on beacon miss. Force other running 1757 * vap's to INIT state and mark them as waiting for the scan to 1758 * complete. This insures they don't interfere with our 1759 * scanning. Since we are single threaded the vaps can not 1760 * transition again while we are executing. 1761 * 1762 * XXX not always right, assumes ap follows sta 1763 */ 1764 markwaiting(vap); 1765 } 1766 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1767 "%s: %s -> %s arg %d\n", __func__, 1768 ieee80211_state_name[ostate], ieee80211_state_name[nstate], arg); 1769 1770 rc = vap->iv_newstate(vap, nstate, arg); 1771 IEEE80211_LOCK_ASSERT(ic); 1772 vap->iv_flags_ext &= ~IEEE80211_FEXT_STATEWAIT; 1773 if (rc != 0) { 1774 /* State transition failed */ 1775 KASSERT(rc != EINPROGRESS, ("iv_newstate was deferred")); 1776 KASSERT(nstate != IEEE80211_S_INIT, 1777 ("INIT state change failed")); 1778 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1779 "%s: %s returned error %d\n", __func__, 1780 ieee80211_state_name[nstate], rc); 1781 goto done; 1782 } 1783 1784 /* No actual transition, skip post processing */ 1785 if (ostate == nstate) 1786 goto done; 1787 1788 if (nstate == IEEE80211_S_RUN) { 1789 /* 1790 * OACTIVE may be set on the vap if the upper layer 1791 * tried to transmit (e.g. IPv6 NDP) before we reach 1792 * RUN state. Clear it and restart xmit. 1793 * 1794 * Note this can also happen as a result of SLEEP->RUN 1795 * (i.e. coming out of power save mode). 1796 */ 1797 #if defined(__DragonFly__) 1798 struct ifaltq_subque *ifsq; 1799 int wst; 1800 1801 ifsq = ifq_get_subq_default(&vap->iv_ifp->if_snd); 1802 ifsq_clr_oactive(ifsq); 1803 wst = wlan_serialize_push(); 1804 vap->iv_ifp->if_start(vap->iv_ifp, ifsq); 1805 wlan_serialize_pop(wst); 1806 #else 1807 vap->iv_ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 1808 #endif 1809 1810 /* 1811 * XXX TODO Kick-start a VAP queue - this should be a method! 1812 */ 1813 1814 /* bring up any vaps waiting on us */ 1815 wakeupwaiting(vap); 1816 } else if (nstate == IEEE80211_S_INIT) { 1817 /* 1818 * Flush the scan cache if we did the last scan (XXX?) 1819 * and flush any frames on send queues from this vap. 1820 * Note the mgt q is used only for legacy drivers and 1821 * will go away shortly. 1822 */ 1823 ieee80211_scan_flush(vap); 1824 1825 /* 1826 * XXX TODO: ic/vap queue flush 1827 */ 1828 } 1829 done: 1830 IEEE80211_UNLOCK(ic); 1831 } 1832 1833 /* 1834 * Public interface for initiating a state machine change. 1835 * This routine single-threads the request and coordinates 1836 * the scheduling of multiple vaps for the purpose of selecting 1837 * an operating channel. Specifically the following scenarios 1838 * are handled: 1839 * o only one vap can be selecting a channel so on transition to 1840 * SCAN state if another vap is already scanning then 1841 * mark the caller for later processing and return without 1842 * doing anything (XXX? expectations by caller of synchronous operation) 1843 * o only one vap can be doing CAC of a channel so on transition to 1844 * CAC state if another vap is already scanning for radar then 1845 * mark the caller for later processing and return without 1846 * doing anything (XXX? expectations by caller of synchronous operation) 1847 * o if another vap is already running when a request is made 1848 * to SCAN then an operating channel has been chosen; bypass 1849 * the scan and just join the channel 1850 * 1851 * Note that the state change call is done through the iv_newstate 1852 * method pointer so any driver routine gets invoked. The driver 1853 * will normally call back into operating mode-specific 1854 * ieee80211_newstate routines (below) unless it needs to completely 1855 * bypass the state machine (e.g. because the firmware has it's 1856 * own idea how things should work). Bypassing the net80211 layer 1857 * is usually a mistake and indicates lack of proper integration 1858 * with the net80211 layer. 1859 */ 1860 int 1861 ieee80211_new_state_locked(struct ieee80211vap *vap, 1862 enum ieee80211_state nstate, int arg) 1863 { 1864 struct ieee80211com *ic = vap->iv_ic; 1865 struct ieee80211vap *vp; 1866 enum ieee80211_state ostate; 1867 int nrunning, nscanning; 1868 1869 IEEE80211_LOCK_ASSERT(ic); 1870 1871 if (vap->iv_flags_ext & IEEE80211_FEXT_STATEWAIT) { 1872 if (vap->iv_nstate == IEEE80211_S_INIT) { 1873 /* 1874 * XXX The vap is being stopped, do no allow any other 1875 * state changes until this is completed. 1876 */ 1877 return -1; 1878 } else if (vap->iv_state != vap->iv_nstate) { 1879 #if 0 1880 /* Warn if the previous state hasn't completed. */ 1881 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1882 "%s: pending %s -> %s transition lost\n", __func__, 1883 ieee80211_state_name[vap->iv_state], 1884 ieee80211_state_name[vap->iv_nstate]); 1885 #else 1886 /* XXX temporarily enable to identify issues */ 1887 if_printf(vap->iv_ifp, 1888 "%s: pending %s -> %s transition lost\n", 1889 __func__, ieee80211_state_name[vap->iv_state], 1890 ieee80211_state_name[vap->iv_nstate]); 1891 #endif 1892 } 1893 } 1894 1895 nrunning = nscanning = 0; 1896 /* XXX can track this state instead of calculating */ 1897 TAILQ_FOREACH(vp, &ic->ic_vaps, iv_next) { 1898 if (vp != vap) { 1899 if (vp->iv_state >= IEEE80211_S_RUN) 1900 nrunning++; 1901 /* XXX doesn't handle bg scan */ 1902 /* NB: CAC+AUTH+ASSOC treated like SCAN */ 1903 else if (vp->iv_state > IEEE80211_S_INIT) 1904 nscanning++; 1905 } 1906 } 1907 ostate = vap->iv_state; 1908 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1909 "%s: %s -> %s (nrunning %d nscanning %d)\n", __func__, 1910 ieee80211_state_name[ostate], ieee80211_state_name[nstate], 1911 nrunning, nscanning); 1912 switch (nstate) { 1913 case IEEE80211_S_SCAN: 1914 if (ostate == IEEE80211_S_INIT) { 1915 /* 1916 * INIT -> SCAN happens on initial bringup. 1917 */ 1918 KASSERT(!(nscanning && nrunning), 1919 ("%d scanning and %d running", nscanning, nrunning)); 1920 if (nscanning) { 1921 /* 1922 * Someone is scanning, defer our state 1923 * change until the work has completed. 1924 */ 1925 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1926 "%s: defer %s -> %s\n", 1927 __func__, ieee80211_state_name[ostate], 1928 ieee80211_state_name[nstate]); 1929 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT; 1930 return 0; 1931 } 1932 if (nrunning) { 1933 /* 1934 * Someone is operating; just join the channel 1935 * they have chosen. 1936 */ 1937 /* XXX kill arg? */ 1938 /* XXX check each opmode, adhoc? */ 1939 if (vap->iv_opmode == IEEE80211_M_STA) 1940 nstate = IEEE80211_S_SCAN; 1941 else 1942 nstate = IEEE80211_S_RUN; 1943 #ifdef IEEE80211_DEBUG 1944 if (nstate != IEEE80211_S_SCAN) { 1945 IEEE80211_DPRINTF(vap, 1946 IEEE80211_MSG_STATE, 1947 "%s: override, now %s -> %s\n", 1948 __func__, 1949 ieee80211_state_name[ostate], 1950 ieee80211_state_name[nstate]); 1951 } 1952 #endif 1953 } 1954 } 1955 break; 1956 case IEEE80211_S_RUN: 1957 if (vap->iv_opmode == IEEE80211_M_WDS && 1958 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) && 1959 nscanning) { 1960 /* 1961 * Legacy WDS with someone else scanning; don't 1962 * go online until that completes as we should 1963 * follow the other vap to the channel they choose. 1964 */ 1965 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1966 "%s: defer %s -> %s (legacy WDS)\n", __func__, 1967 ieee80211_state_name[ostate], 1968 ieee80211_state_name[nstate]); 1969 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT; 1970 return 0; 1971 } 1972 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 1973 IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) && 1974 (vap->iv_flags_ext & IEEE80211_FEXT_DFS) && 1975 !IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) { 1976 /* 1977 * This is a DFS channel, transition to CAC state 1978 * instead of RUN. This allows us to initiate 1979 * Channel Availability Check (CAC) as specified 1980 * by 11h/DFS. 1981 */ 1982 nstate = IEEE80211_S_CAC; 1983 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1984 "%s: override %s -> %s (DFS)\n", __func__, 1985 ieee80211_state_name[ostate], 1986 ieee80211_state_name[nstate]); 1987 } 1988 break; 1989 case IEEE80211_S_INIT: 1990 /* cancel any scan in progress */ 1991 ieee80211_cancel_scan(vap); 1992 if (ostate == IEEE80211_S_INIT ) { 1993 /* XXX don't believe this */ 1994 /* INIT -> INIT. nothing to do */ 1995 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANWAIT; 1996 } 1997 /* fall thru... */ 1998 default: 1999 break; 2000 } 2001 /* defer the state change to a thread */ 2002 vap->iv_nstate = nstate; 2003 vap->iv_nstate_arg = arg; 2004 vap->iv_flags_ext |= IEEE80211_FEXT_STATEWAIT; 2005 ieee80211_runtask(ic, &vap->iv_nstate_task); 2006 return EINPROGRESS; 2007 } 2008 2009 int 2010 ieee80211_new_state(struct ieee80211vap *vap, 2011 enum ieee80211_state nstate, int arg) 2012 { 2013 struct ieee80211com *ic = vap->iv_ic; 2014 int rc; 2015 2016 IEEE80211_LOCK(ic); 2017 rc = ieee80211_new_state_locked(vap, nstate, arg); 2018 IEEE80211_UNLOCK(ic); 2019 return rc; 2020 } 2021