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__, fixedrate, ucastrate, flags); 607 return badrate | IEEE80211_RATE_BASIC; 608 } else 609 return RV(okrate); 610 #undef RV 611 } 612 613 /* 614 * Reset 11g-related state. 615 */ 616 void 617 ieee80211_reset_erp(struct ieee80211com *ic) 618 { 619 ic->ic_flags &= ~IEEE80211_F_USEPROT; 620 ic->ic_nonerpsta = 0; 621 ic->ic_longslotsta = 0; 622 /* 623 * Short slot time is enabled only when operating in 11g 624 * and not in an IBSS. We must also honor whether or not 625 * the driver is capable of doing it. 626 */ 627 ieee80211_set_shortslottime(ic, 628 IEEE80211_IS_CHAN_A(ic->ic_curchan) || 629 IEEE80211_IS_CHAN_HT(ic->ic_curchan) || 630 (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 631 ic->ic_opmode == IEEE80211_M_HOSTAP && 632 (ic->ic_caps & IEEE80211_C_SHSLOT))); 633 /* 634 * Set short preamble and ERP barker-preamble flags. 635 */ 636 if (IEEE80211_IS_CHAN_A(ic->ic_curchan) || 637 (ic->ic_caps & IEEE80211_C_SHPREAMBLE)) { 638 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 639 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 640 } else { 641 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 642 ic->ic_flags |= IEEE80211_F_USEBARKER; 643 } 644 } 645 646 /* 647 * Set the short slot time state and notify the driver. 648 */ 649 void 650 ieee80211_set_shortslottime(struct ieee80211com *ic, int onoff) 651 { 652 if (onoff) 653 ic->ic_flags |= IEEE80211_F_SHSLOT; 654 else 655 ic->ic_flags &= ~IEEE80211_F_SHSLOT; 656 /* notify driver */ 657 if (ic->ic_updateslot != NULL) 658 ic->ic_updateslot(ic->ic_ifp); 659 } 660 661 /* 662 * Check if the specified rate set supports ERP. 663 * NB: the rate set is assumed to be sorted. 664 */ 665 int 666 ieee80211_iserp_rateset(const struct ieee80211_rateset *rs) 667 { 668 static const int rates[] = { 2, 4, 11, 22, 12, 24, 48 }; 669 int i, j; 670 671 if (rs->rs_nrates < nitems(rates)) 672 return 0; 673 for (i = 0; i < nitems(rates); i++) { 674 for (j = 0; j < rs->rs_nrates; j++) { 675 int r = rs->rs_rates[j] & IEEE80211_RATE_VAL; 676 if (rates[i] == r) 677 goto next; 678 if (r > rates[i]) 679 return 0; 680 } 681 return 0; 682 next: 683 ; 684 } 685 return 1; 686 } 687 688 /* 689 * Mark the basic rates for the rate table based on the 690 * operating mode. For real 11g we mark all the 11b rates 691 * and 6, 12, and 24 OFDM. For 11b compatibility we mark only 692 * 11b rates. There's also a pseudo 11a-mode used to mark only 693 * the basic OFDM rates. 694 */ 695 static void 696 setbasicrates(struct ieee80211_rateset *rs, 697 enum ieee80211_phymode mode, int add) 698 { 699 static const struct ieee80211_rateset basic[IEEE80211_MODE_MAX] = { 700 [IEEE80211_MODE_11A] = { 3, { 12, 24, 48 } }, 701 [IEEE80211_MODE_11B] = { 2, { 2, 4 } }, 702 /* NB: mixed b/g */ 703 [IEEE80211_MODE_11G] = { 4, { 2, 4, 11, 22 } }, 704 [IEEE80211_MODE_TURBO_A] = { 3, { 12, 24, 48 } }, 705 [IEEE80211_MODE_TURBO_G] = { 4, { 2, 4, 11, 22 } }, 706 [IEEE80211_MODE_STURBO_A] = { 3, { 12, 24, 48 } }, 707 [IEEE80211_MODE_HALF] = { 3, { 6, 12, 24 } }, 708 [IEEE80211_MODE_QUARTER] = { 3, { 3, 6, 12 } }, 709 [IEEE80211_MODE_11NA] = { 3, { 12, 24, 48 } }, 710 /* NB: mixed b/g */ 711 [IEEE80211_MODE_11NG] = { 4, { 2, 4, 11, 22 } }, 712 }; 713 int i, j; 714 715 for (i = 0; i < rs->rs_nrates; i++) { 716 if (!add) 717 rs->rs_rates[i] &= IEEE80211_RATE_VAL; 718 for (j = 0; j < basic[mode].rs_nrates; j++) 719 if (basic[mode].rs_rates[j] == rs->rs_rates[i]) { 720 rs->rs_rates[i] |= IEEE80211_RATE_BASIC; 721 break; 722 } 723 } 724 } 725 726 /* 727 * Set the basic rates in a rate set. 728 */ 729 void 730 ieee80211_setbasicrates(struct ieee80211_rateset *rs, 731 enum ieee80211_phymode mode) 732 { 733 setbasicrates(rs, mode, 0); 734 } 735 736 /* 737 * Add basic rates to a rate set. 738 */ 739 void 740 ieee80211_addbasicrates(struct ieee80211_rateset *rs, 741 enum ieee80211_phymode mode) 742 { 743 setbasicrates(rs, mode, 1); 744 } 745 746 /* 747 * WME protocol support. 748 * 749 * The default 11a/b/g/n parameters come from the WiFi Alliance WMM 750 * System Interopability Test Plan (v1.4, Appendix F) and the 802.11n 751 * Draft 2.0 Test Plan (Appendix D). 752 * 753 * Static/Dynamic Turbo mode settings come from Atheros. 754 */ 755 typedef struct phyParamType { 756 uint8_t aifsn; 757 uint8_t logcwmin; 758 uint8_t logcwmax; 759 uint16_t txopLimit; 760 uint8_t acm; 761 } paramType; 762 763 static const struct phyParamType phyParamForAC_BE[IEEE80211_MODE_MAX] = { 764 [IEEE80211_MODE_AUTO] = { 3, 4, 6, 0, 0 }, 765 [IEEE80211_MODE_11A] = { 3, 4, 6, 0, 0 }, 766 [IEEE80211_MODE_11B] = { 3, 4, 6, 0, 0 }, 767 [IEEE80211_MODE_11G] = { 3, 4, 6, 0, 0 }, 768 [IEEE80211_MODE_FH] = { 3, 4, 6, 0, 0 }, 769 [IEEE80211_MODE_TURBO_A]= { 2, 3, 5, 0, 0 }, 770 [IEEE80211_MODE_TURBO_G]= { 2, 3, 5, 0, 0 }, 771 [IEEE80211_MODE_STURBO_A]={ 2, 3, 5, 0, 0 }, 772 [IEEE80211_MODE_HALF] = { 3, 4, 6, 0, 0 }, 773 [IEEE80211_MODE_QUARTER]= { 3, 4, 6, 0, 0 }, 774 [IEEE80211_MODE_11NA] = { 3, 4, 6, 0, 0 }, 775 [IEEE80211_MODE_11NG] = { 3, 4, 6, 0, 0 }, 776 }; 777 static const struct phyParamType phyParamForAC_BK[IEEE80211_MODE_MAX] = { 778 [IEEE80211_MODE_AUTO] = { 7, 4, 10, 0, 0 }, 779 [IEEE80211_MODE_11A] = { 7, 4, 10, 0, 0 }, 780 [IEEE80211_MODE_11B] = { 7, 4, 10, 0, 0 }, 781 [IEEE80211_MODE_11G] = { 7, 4, 10, 0, 0 }, 782 [IEEE80211_MODE_FH] = { 7, 4, 10, 0, 0 }, 783 [IEEE80211_MODE_TURBO_A]= { 7, 3, 10, 0, 0 }, 784 [IEEE80211_MODE_TURBO_G]= { 7, 3, 10, 0, 0 }, 785 [IEEE80211_MODE_STURBO_A]={ 7, 3, 10, 0, 0 }, 786 [IEEE80211_MODE_HALF] = { 7, 4, 10, 0, 0 }, 787 [IEEE80211_MODE_QUARTER]= { 7, 4, 10, 0, 0 }, 788 [IEEE80211_MODE_11NA] = { 7, 4, 10, 0, 0 }, 789 [IEEE80211_MODE_11NG] = { 7, 4, 10, 0, 0 }, 790 }; 791 static const struct phyParamType phyParamForAC_VI[IEEE80211_MODE_MAX] = { 792 [IEEE80211_MODE_AUTO] = { 1, 3, 4, 94, 0 }, 793 [IEEE80211_MODE_11A] = { 1, 3, 4, 94, 0 }, 794 [IEEE80211_MODE_11B] = { 1, 3, 4, 188, 0 }, 795 [IEEE80211_MODE_11G] = { 1, 3, 4, 94, 0 }, 796 [IEEE80211_MODE_FH] = { 1, 3, 4, 188, 0 }, 797 [IEEE80211_MODE_TURBO_A]= { 1, 2, 3, 94, 0 }, 798 [IEEE80211_MODE_TURBO_G]= { 1, 2, 3, 94, 0 }, 799 [IEEE80211_MODE_STURBO_A]={ 1, 2, 3, 94, 0 }, 800 [IEEE80211_MODE_HALF] = { 1, 3, 4, 94, 0 }, 801 [IEEE80211_MODE_QUARTER]= { 1, 3, 4, 94, 0 }, 802 [IEEE80211_MODE_11NA] = { 1, 3, 4, 94, 0 }, 803 [IEEE80211_MODE_11NG] = { 1, 3, 4, 94, 0 }, 804 }; 805 static const struct phyParamType phyParamForAC_VO[IEEE80211_MODE_MAX] = { 806 [IEEE80211_MODE_AUTO] = { 1, 2, 3, 47, 0 }, 807 [IEEE80211_MODE_11A] = { 1, 2, 3, 47, 0 }, 808 [IEEE80211_MODE_11B] = { 1, 2, 3, 102, 0 }, 809 [IEEE80211_MODE_11G] = { 1, 2, 3, 47, 0 }, 810 [IEEE80211_MODE_FH] = { 1, 2, 3, 102, 0 }, 811 [IEEE80211_MODE_TURBO_A]= { 1, 2, 2, 47, 0 }, 812 [IEEE80211_MODE_TURBO_G]= { 1, 2, 2, 47, 0 }, 813 [IEEE80211_MODE_STURBO_A]={ 1, 2, 2, 47, 0 }, 814 [IEEE80211_MODE_HALF] = { 1, 2, 3, 47, 0 }, 815 [IEEE80211_MODE_QUARTER]= { 1, 2, 3, 47, 0 }, 816 [IEEE80211_MODE_11NA] = { 1, 2, 3, 47, 0 }, 817 [IEEE80211_MODE_11NG] = { 1, 2, 3, 47, 0 }, 818 }; 819 820 static const struct phyParamType bssPhyParamForAC_BE[IEEE80211_MODE_MAX] = { 821 [IEEE80211_MODE_AUTO] = { 3, 4, 10, 0, 0 }, 822 [IEEE80211_MODE_11A] = { 3, 4, 10, 0, 0 }, 823 [IEEE80211_MODE_11B] = { 3, 4, 10, 0, 0 }, 824 [IEEE80211_MODE_11G] = { 3, 4, 10, 0, 0 }, 825 [IEEE80211_MODE_FH] = { 3, 4, 10, 0, 0 }, 826 [IEEE80211_MODE_TURBO_A]= { 2, 3, 10, 0, 0 }, 827 [IEEE80211_MODE_TURBO_G]= { 2, 3, 10, 0, 0 }, 828 [IEEE80211_MODE_STURBO_A]={ 2, 3, 10, 0, 0 }, 829 [IEEE80211_MODE_HALF] = { 3, 4, 10, 0, 0 }, 830 [IEEE80211_MODE_QUARTER]= { 3, 4, 10, 0, 0 }, 831 [IEEE80211_MODE_11NA] = { 3, 4, 10, 0, 0 }, 832 [IEEE80211_MODE_11NG] = { 3, 4, 10, 0, 0 }, 833 }; 834 static const struct phyParamType bssPhyParamForAC_VI[IEEE80211_MODE_MAX] = { 835 [IEEE80211_MODE_AUTO] = { 2, 3, 4, 94, 0 }, 836 [IEEE80211_MODE_11A] = { 2, 3, 4, 94, 0 }, 837 [IEEE80211_MODE_11B] = { 2, 3, 4, 188, 0 }, 838 [IEEE80211_MODE_11G] = { 2, 3, 4, 94, 0 }, 839 [IEEE80211_MODE_FH] = { 2, 3, 4, 188, 0 }, 840 [IEEE80211_MODE_TURBO_A]= { 2, 2, 3, 94, 0 }, 841 [IEEE80211_MODE_TURBO_G]= { 2, 2, 3, 94, 0 }, 842 [IEEE80211_MODE_STURBO_A]={ 2, 2, 3, 94, 0 }, 843 [IEEE80211_MODE_HALF] = { 2, 3, 4, 94, 0 }, 844 [IEEE80211_MODE_QUARTER]= { 2, 3, 4, 94, 0 }, 845 [IEEE80211_MODE_11NA] = { 2, 3, 4, 94, 0 }, 846 [IEEE80211_MODE_11NG] = { 2, 3, 4, 94, 0 }, 847 }; 848 static const struct phyParamType bssPhyParamForAC_VO[IEEE80211_MODE_MAX] = { 849 [IEEE80211_MODE_AUTO] = { 2, 2, 3, 47, 0 }, 850 [IEEE80211_MODE_11A] = { 2, 2, 3, 47, 0 }, 851 [IEEE80211_MODE_11B] = { 2, 2, 3, 102, 0 }, 852 [IEEE80211_MODE_11G] = { 2, 2, 3, 47, 0 }, 853 [IEEE80211_MODE_FH] = { 2, 2, 3, 102, 0 }, 854 [IEEE80211_MODE_TURBO_A]= { 1, 2, 2, 47, 0 }, 855 [IEEE80211_MODE_TURBO_G]= { 1, 2, 2, 47, 0 }, 856 [IEEE80211_MODE_STURBO_A]={ 1, 2, 2, 47, 0 }, 857 [IEEE80211_MODE_HALF] = { 2, 2, 3, 47, 0 }, 858 [IEEE80211_MODE_QUARTER]= { 2, 2, 3, 47, 0 }, 859 [IEEE80211_MODE_11NA] = { 2, 2, 3, 47, 0 }, 860 [IEEE80211_MODE_11NG] = { 2, 2, 3, 47, 0 }, 861 }; 862 863 static void 864 _setifsparams(struct wmeParams *wmep, const paramType *phy) 865 { 866 wmep->wmep_aifsn = phy->aifsn; 867 wmep->wmep_logcwmin = phy->logcwmin; 868 wmep->wmep_logcwmax = phy->logcwmax; 869 wmep->wmep_txopLimit = phy->txopLimit; 870 } 871 872 static void 873 setwmeparams(struct ieee80211vap *vap, const char *type, int ac, 874 struct wmeParams *wmep, const paramType *phy) 875 { 876 wmep->wmep_acm = phy->acm; 877 _setifsparams(wmep, phy); 878 879 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 880 "set %s (%s) [acm %u aifsn %u logcwmin %u logcwmax %u txop %u]\n", 881 ieee80211_wme_acnames[ac], type, 882 wmep->wmep_acm, wmep->wmep_aifsn, wmep->wmep_logcwmin, 883 wmep->wmep_logcwmax, wmep->wmep_txopLimit); 884 } 885 886 static void 887 ieee80211_wme_initparams_locked(struct ieee80211vap *vap) 888 { 889 struct ieee80211com *ic = vap->iv_ic; 890 struct ieee80211_wme_state *wme = &ic->ic_wme; 891 const paramType *pPhyParam, *pBssPhyParam; 892 struct wmeParams *wmep; 893 enum ieee80211_phymode mode; 894 int i; 895 896 IEEE80211_LOCK_ASSERT(ic); 897 898 if ((ic->ic_caps & IEEE80211_C_WME) == 0 || ic->ic_nrunning > 1) 899 return; 900 901 /* 902 * Clear the wme cap_info field so a qoscount from a previous 903 * vap doesn't confuse later code which only parses the beacon 904 * field and updates hardware when said field changes. 905 * Otherwise the hardware is programmed with defaults, not what 906 * the beacon actually announces. 907 */ 908 wme->wme_wmeChanParams.cap_info = 0; 909 910 /* 911 * Select mode; we can be called early in which case we 912 * always use auto mode. We know we'll be called when 913 * entering the RUN state with bsschan setup properly 914 * so state will eventually get set correctly 915 */ 916 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC) 917 mode = ieee80211_chan2mode(ic->ic_bsschan); 918 else 919 mode = IEEE80211_MODE_AUTO; 920 for (i = 0; i < WME_NUM_AC; i++) { 921 switch (i) { 922 case WME_AC_BK: 923 pPhyParam = &phyParamForAC_BK[mode]; 924 pBssPhyParam = &phyParamForAC_BK[mode]; 925 break; 926 case WME_AC_VI: 927 pPhyParam = &phyParamForAC_VI[mode]; 928 pBssPhyParam = &bssPhyParamForAC_VI[mode]; 929 break; 930 case WME_AC_VO: 931 pPhyParam = &phyParamForAC_VO[mode]; 932 pBssPhyParam = &bssPhyParamForAC_VO[mode]; 933 break; 934 case WME_AC_BE: 935 default: 936 pPhyParam = &phyParamForAC_BE[mode]; 937 pBssPhyParam = &bssPhyParamForAC_BE[mode]; 938 break; 939 } 940 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i]; 941 if (ic->ic_opmode == IEEE80211_M_HOSTAP) { 942 setwmeparams(vap, "chan", i, wmep, pPhyParam); 943 } else { 944 setwmeparams(vap, "chan", i, wmep, pBssPhyParam); 945 } 946 wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i]; 947 setwmeparams(vap, "bss ", i, wmep, pBssPhyParam); 948 } 949 /* NB: check ic_bss to avoid NULL deref on initial attach */ 950 if (vap->iv_bss != NULL) { 951 /* 952 * Calculate agressive mode switching threshold based 953 * on beacon interval. This doesn't need locking since 954 * we're only called before entering the RUN state at 955 * which point we start sending beacon frames. 956 */ 957 wme->wme_hipri_switch_thresh = 958 (HIGH_PRI_SWITCH_THRESH * vap->iv_bss->ni_intval) / 100; 959 wme->wme_flags &= ~WME_F_AGGRMODE; 960 ieee80211_wme_updateparams(vap); 961 } 962 } 963 964 void 965 ieee80211_wme_initparams(struct ieee80211vap *vap) 966 { 967 struct ieee80211com *ic = vap->iv_ic; 968 969 IEEE80211_LOCK(ic); 970 ieee80211_wme_initparams_locked(vap); 971 IEEE80211_UNLOCK(ic); 972 } 973 974 /* 975 * Update WME parameters for ourself and the BSS. 976 */ 977 void 978 ieee80211_wme_updateparams_locked(struct ieee80211vap *vap) 979 { 980 static const paramType aggrParam[IEEE80211_MODE_MAX] = { 981 [IEEE80211_MODE_AUTO] = { 2, 4, 10, 64, 0 }, 982 [IEEE80211_MODE_11A] = { 2, 4, 10, 64, 0 }, 983 [IEEE80211_MODE_11B] = { 2, 5, 10, 64, 0 }, 984 [IEEE80211_MODE_11G] = { 2, 4, 10, 64, 0 }, 985 [IEEE80211_MODE_FH] = { 2, 5, 10, 64, 0 }, 986 [IEEE80211_MODE_TURBO_A] = { 1, 3, 10, 64, 0 }, 987 [IEEE80211_MODE_TURBO_G] = { 1, 3, 10, 64, 0 }, 988 [IEEE80211_MODE_STURBO_A] = { 1, 3, 10, 64, 0 }, 989 [IEEE80211_MODE_HALF] = { 2, 4, 10, 64, 0 }, 990 [IEEE80211_MODE_QUARTER] = { 2, 4, 10, 64, 0 }, 991 [IEEE80211_MODE_11NA] = { 2, 4, 10, 64, 0 }, /* XXXcheck*/ 992 [IEEE80211_MODE_11NG] = { 2, 4, 10, 64, 0 }, /* XXXcheck*/ 993 }; 994 struct ieee80211com *ic = vap->iv_ic; 995 struct ieee80211_wme_state *wme = &ic->ic_wme; 996 const struct wmeParams *wmep; 997 struct wmeParams *chanp, *bssp; 998 enum ieee80211_phymode mode; 999 int i; 1000 int do_aggrmode = 0; 1001 1002 /* 1003 * Set up the channel access parameters for the physical 1004 * device. First populate the configured settings. 1005 */ 1006 for (i = 0; i < WME_NUM_AC; i++) { 1007 chanp = &wme->wme_chanParams.cap_wmeParams[i]; 1008 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i]; 1009 chanp->wmep_aifsn = wmep->wmep_aifsn; 1010 chanp->wmep_logcwmin = wmep->wmep_logcwmin; 1011 chanp->wmep_logcwmax = wmep->wmep_logcwmax; 1012 chanp->wmep_txopLimit = wmep->wmep_txopLimit; 1013 1014 chanp = &wme->wme_bssChanParams.cap_wmeParams[i]; 1015 wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i]; 1016 chanp->wmep_aifsn = wmep->wmep_aifsn; 1017 chanp->wmep_logcwmin = wmep->wmep_logcwmin; 1018 chanp->wmep_logcwmax = wmep->wmep_logcwmax; 1019 chanp->wmep_txopLimit = wmep->wmep_txopLimit; 1020 } 1021 1022 /* 1023 * Select mode; we can be called early in which case we 1024 * always use auto mode. We know we'll be called when 1025 * entering the RUN state with bsschan setup properly 1026 * so state will eventually get set correctly 1027 */ 1028 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC) 1029 mode = ieee80211_chan2mode(ic->ic_bsschan); 1030 else 1031 mode = IEEE80211_MODE_AUTO; 1032 1033 /* 1034 * This implements agressive mode as found in certain 1035 * vendors' AP's. When there is significant high 1036 * priority (VI/VO) traffic in the BSS throttle back BE 1037 * traffic by using conservative parameters. Otherwise 1038 * BE uses agressive params to optimize performance of 1039 * legacy/non-QoS traffic. 1040 */ 1041 1042 /* Hostap? Only if aggressive mode is enabled */ 1043 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 1044 (wme->wme_flags & WME_F_AGGRMODE) != 0) 1045 do_aggrmode = 1; 1046 1047 /* 1048 * Station? Only if we're in a non-QoS BSS. 1049 */ 1050 else if ((vap->iv_opmode == IEEE80211_M_STA && 1051 (vap->iv_bss->ni_flags & IEEE80211_NODE_QOS) == 0)) 1052 do_aggrmode = 1; 1053 1054 /* 1055 * IBSS? Only if we we have WME enabled. 1056 */ 1057 else if ((vap->iv_opmode == IEEE80211_M_IBSS) && 1058 (vap->iv_flags & IEEE80211_F_WME)) 1059 do_aggrmode = 1; 1060 1061 /* 1062 * If WME is disabled on this VAP, default to aggressive mode 1063 * regardless of the configuration. 1064 */ 1065 if ((vap->iv_flags & IEEE80211_F_WME) == 0) 1066 do_aggrmode = 1; 1067 1068 /* XXX WDS? */ 1069 1070 /* XXX MBSS? */ 1071 1072 if (do_aggrmode) { 1073 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE]; 1074 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE]; 1075 1076 chanp->wmep_aifsn = bssp->wmep_aifsn = aggrParam[mode].aifsn; 1077 chanp->wmep_logcwmin = bssp->wmep_logcwmin = 1078 aggrParam[mode].logcwmin; 1079 chanp->wmep_logcwmax = bssp->wmep_logcwmax = 1080 aggrParam[mode].logcwmax; 1081 chanp->wmep_txopLimit = bssp->wmep_txopLimit = 1082 (vap->iv_flags & IEEE80211_F_BURST) ? 1083 aggrParam[mode].txopLimit : 0; 1084 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 1085 "update %s (chan+bss) [acm %u aifsn %u logcwmin %u " 1086 "logcwmax %u txop %u]\n", ieee80211_wme_acnames[WME_AC_BE], 1087 chanp->wmep_acm, chanp->wmep_aifsn, chanp->wmep_logcwmin, 1088 chanp->wmep_logcwmax, chanp->wmep_txopLimit); 1089 } 1090 1091 1092 /* 1093 * Change the contention window based on the number of associated 1094 * stations. If the number of associated stations is 1 and 1095 * aggressive mode is enabled, lower the contention window even 1096 * further. 1097 */ 1098 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 1099 ic->ic_sta_assoc < 2 && (wme->wme_flags & WME_F_AGGRMODE) != 0) { 1100 static const uint8_t logCwMin[IEEE80211_MODE_MAX] = { 1101 [IEEE80211_MODE_AUTO] = 3, 1102 [IEEE80211_MODE_11A] = 3, 1103 [IEEE80211_MODE_11B] = 4, 1104 [IEEE80211_MODE_11G] = 3, 1105 [IEEE80211_MODE_FH] = 4, 1106 [IEEE80211_MODE_TURBO_A] = 3, 1107 [IEEE80211_MODE_TURBO_G] = 3, 1108 [IEEE80211_MODE_STURBO_A] = 3, 1109 [IEEE80211_MODE_HALF] = 3, 1110 [IEEE80211_MODE_QUARTER] = 3, 1111 [IEEE80211_MODE_11NA] = 3, 1112 [IEEE80211_MODE_11NG] = 3, 1113 }; 1114 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE]; 1115 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE]; 1116 1117 chanp->wmep_logcwmin = bssp->wmep_logcwmin = logCwMin[mode]; 1118 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 1119 "update %s (chan+bss) logcwmin %u\n", 1120 ieee80211_wme_acnames[WME_AC_BE], chanp->wmep_logcwmin); 1121 } 1122 1123 /* 1124 * Arrange for the beacon update. 1125 * 1126 * XXX what about MBSS, WDS? 1127 */ 1128 if (vap->iv_opmode == IEEE80211_M_HOSTAP 1129 || vap->iv_opmode == IEEE80211_M_IBSS) { 1130 /* 1131 * Arrange for a beacon update and bump the parameter 1132 * set number so associated stations load the new values. 1133 */ 1134 wme->wme_bssChanParams.cap_info = 1135 (wme->wme_bssChanParams.cap_info+1) & WME_QOSINFO_COUNT; 1136 ieee80211_beacon_notify(vap, IEEE80211_BEACON_WME); 1137 } 1138 1139 wme->wme_update(ic); 1140 1141 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 1142 "%s: WME params updated, cap_info 0x%x\n", __func__, 1143 vap->iv_opmode == IEEE80211_M_STA ? 1144 wme->wme_wmeChanParams.cap_info : 1145 wme->wme_bssChanParams.cap_info); 1146 } 1147 1148 void 1149 ieee80211_wme_updateparams(struct ieee80211vap *vap) 1150 { 1151 struct ieee80211com *ic = vap->iv_ic; 1152 1153 if (ic->ic_caps & IEEE80211_C_WME) { 1154 IEEE80211_LOCK(ic); 1155 ieee80211_wme_updateparams_locked(vap); 1156 IEEE80211_UNLOCK(ic); 1157 } 1158 } 1159 1160 static void 1161 parent_updown(void *arg, int npending) 1162 { 1163 struct ifnet *parent = arg; 1164 1165 #if defined(__DragonFly__) 1166 int wst; 1167 1168 wst = wlan_serialize_push(); 1169 parent->if_ioctl(parent, SIOCSIFFLAGS, NULL, NULL); 1170 wlan_serialize_pop(wst); 1171 #else 1172 parent->if_ioctl(parent, SIOCSIFFLAGS, NULL); 1173 #endif 1174 } 1175 1176 static void 1177 update_mcast(void *arg, int npending) 1178 { 1179 struct ieee80211com *ic = arg; 1180 struct ifnet *parent = ic->ic_ifp; 1181 1182 ic->ic_update_mcast(parent); 1183 } 1184 1185 static void 1186 update_promisc(void *arg, int npending) 1187 { 1188 struct ieee80211com *ic = arg; 1189 struct ifnet *parent = ic->ic_ifp; 1190 1191 ic->ic_update_promisc(parent); 1192 } 1193 1194 static void 1195 update_channel(void *arg, int npending) 1196 { 1197 struct ieee80211com *ic = arg; 1198 1199 ic->ic_set_channel(ic); 1200 ieee80211_radiotap_chan_change(ic); 1201 } 1202 1203 static void 1204 update_chw(void *arg, int npending) 1205 { 1206 struct ieee80211com *ic = arg; 1207 1208 /* 1209 * XXX should we defer the channel width _config_ update until now? 1210 */ 1211 ic->ic_update_chw(ic); 1212 } 1213 1214 /* 1215 * Block until the parent is in a known state. This is 1216 * used after any operations that dispatch a task (e.g. 1217 * to auto-configure the parent device up/down). 1218 */ 1219 void 1220 ieee80211_waitfor_parent(struct ieee80211com *ic) 1221 { 1222 taskqueue_block(ic->ic_tq); 1223 ieee80211_draintask(ic, &ic->ic_parent_task); 1224 ieee80211_draintask(ic, &ic->ic_mcast_task); 1225 ieee80211_draintask(ic, &ic->ic_promisc_task); 1226 ieee80211_draintask(ic, &ic->ic_chan_task); 1227 ieee80211_draintask(ic, &ic->ic_bmiss_task); 1228 ieee80211_draintask(ic, &ic->ic_chw_task); 1229 taskqueue_unblock(ic->ic_tq); 1230 } 1231 1232 /* 1233 * Start a vap running. If this is the first vap to be 1234 * set running on the underlying device then we 1235 * automatically bring the device up. 1236 */ 1237 void 1238 ieee80211_start_locked(struct ieee80211vap *vap) 1239 { 1240 struct ifnet *ifp = vap->iv_ifp; 1241 struct ieee80211com *ic = vap->iv_ic; 1242 struct ifnet *parent = ic->ic_ifp; 1243 1244 IEEE80211_LOCK_ASSERT(ic); 1245 1246 IEEE80211_DPRINTF(vap, 1247 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1248 "start running, %d vaps running\n", ic->ic_nrunning); 1249 1250 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) { 1251 /* 1252 * Mark us running. Note that it's ok to do this first; 1253 * if we need to bring the parent device up we defer that 1254 * to avoid dropping the com lock. We expect the device 1255 * to respond to being marked up by calling back into us 1256 * through ieee80211_start_all at which point we'll come 1257 * back in here and complete the work. 1258 */ 1259 ifp->if_drv_flags |= IFF_DRV_RUNNING; 1260 /* 1261 * We are not running; if this we are the first vap 1262 * to be brought up auto-up the parent if necessary. 1263 */ 1264 if (ic->ic_nrunning++ == 0 && 1265 (parent->if_drv_flags & IFF_DRV_RUNNING) == 0) { 1266 IEEE80211_DPRINTF(vap, 1267 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1268 "%s: up parent %s\n", __func__, parent->if_xname); 1269 parent->if_flags |= IFF_UP; 1270 ieee80211_runtask(ic, &ic->ic_parent_task); 1271 return; 1272 } 1273 } 1274 /* 1275 * If the parent is up and running, then kick the 1276 * 802.11 state machine as appropriate. 1277 */ 1278 if ((parent->if_drv_flags & IFF_DRV_RUNNING) && 1279 vap->iv_roaming != IEEE80211_ROAMING_MANUAL) { 1280 if (vap->iv_opmode == IEEE80211_M_STA) { 1281 #if 0 1282 /* XXX bypasses scan too easily; disable for now */ 1283 /* 1284 * Try to be intelligent about clocking the state 1285 * machine. If we're currently in RUN state then 1286 * we should be able to apply any new state/parameters 1287 * simply by re-associating. Otherwise we need to 1288 * re-scan to select an appropriate ap. 1289 */ 1290 if (vap->iv_state >= IEEE80211_S_RUN) 1291 ieee80211_new_state_locked(vap, 1292 IEEE80211_S_ASSOC, 1); 1293 else 1294 #endif 1295 ieee80211_new_state_locked(vap, 1296 IEEE80211_S_SCAN, 0); 1297 } else { 1298 /* 1299 * For monitor+wds mode there's nothing to do but 1300 * start running. Otherwise if this is the first 1301 * vap to be brought up, start a scan which may be 1302 * preempted if the station is locked to a particular 1303 * channel. 1304 */ 1305 vap->iv_flags_ext |= IEEE80211_FEXT_REINIT; 1306 if (vap->iv_opmode == IEEE80211_M_MONITOR || 1307 vap->iv_opmode == IEEE80211_M_WDS) 1308 ieee80211_new_state_locked(vap, 1309 IEEE80211_S_RUN, -1); 1310 else 1311 ieee80211_new_state_locked(vap, 1312 IEEE80211_S_SCAN, 0); 1313 } 1314 } 1315 } 1316 1317 /* 1318 * Start a single vap. 1319 */ 1320 void 1321 ieee80211_init(void *arg) 1322 { 1323 struct ieee80211vap *vap = arg; 1324 1325 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1326 "%s\n", __func__); 1327 1328 IEEE80211_LOCK(vap->iv_ic); 1329 ieee80211_start_locked(vap); 1330 IEEE80211_UNLOCK(vap->iv_ic); 1331 } 1332 1333 /* 1334 * Start all runnable vap's on a device. 1335 */ 1336 void 1337 ieee80211_start_all(struct ieee80211com *ic) 1338 { 1339 struct ieee80211vap *vap; 1340 1341 IEEE80211_LOCK(ic); 1342 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1343 struct ifnet *ifp = vap->iv_ifp; 1344 if (IFNET_IS_UP_RUNNING(ifp)) /* NB: avoid recursion */ 1345 ieee80211_start_locked(vap); 1346 } 1347 IEEE80211_UNLOCK(ic); 1348 } 1349 1350 /* 1351 * Stop a vap. We force it down using the state machine 1352 * then mark it's ifnet not running. If this is the last 1353 * vap running on the underlying device then we close it 1354 * too to insure it will be properly initialized when the 1355 * next vap is brought up. 1356 */ 1357 void 1358 ieee80211_stop_locked(struct ieee80211vap *vap) 1359 { 1360 struct ieee80211com *ic = vap->iv_ic; 1361 struct ifnet *ifp = vap->iv_ifp; 1362 struct ifnet *parent = ic->ic_ifp; 1363 1364 IEEE80211_LOCK_ASSERT(ic); 1365 1366 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1367 "stop running, %d vaps running\n", ic->ic_nrunning); 1368 1369 ieee80211_new_state_locked(vap, IEEE80211_S_INIT, -1); 1370 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 1371 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; /* mark us stopped */ 1372 if (--ic->ic_nrunning == 0 && 1373 (parent->if_drv_flags & IFF_DRV_RUNNING)) { 1374 IEEE80211_DPRINTF(vap, 1375 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1376 "down parent %s\n", parent->if_xname); 1377 parent->if_flags &= ~IFF_UP; 1378 ieee80211_runtask(ic, &ic->ic_parent_task); 1379 } 1380 } 1381 } 1382 1383 void 1384 ieee80211_stop(struct ieee80211vap *vap) 1385 { 1386 struct ieee80211com *ic = vap->iv_ic; 1387 1388 IEEE80211_LOCK(ic); 1389 ieee80211_stop_locked(vap); 1390 IEEE80211_UNLOCK(ic); 1391 } 1392 1393 /* 1394 * Stop all vap's running on a device. 1395 */ 1396 void 1397 ieee80211_stop_all(struct ieee80211com *ic) 1398 { 1399 struct ieee80211vap *vap; 1400 1401 IEEE80211_LOCK(ic); 1402 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1403 struct ifnet *ifp = vap->iv_ifp; 1404 if (IFNET_IS_UP_RUNNING(ifp)) /* NB: avoid recursion */ 1405 ieee80211_stop_locked(vap); 1406 } 1407 IEEE80211_UNLOCK(ic); 1408 1409 ieee80211_waitfor_parent(ic); 1410 } 1411 1412 /* 1413 * Stop all vap's running on a device and arrange 1414 * for those that were running to be resumed. 1415 */ 1416 void 1417 ieee80211_suspend_all(struct ieee80211com *ic) 1418 { 1419 struct ieee80211vap *vap; 1420 1421 IEEE80211_LOCK(ic); 1422 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1423 struct ifnet *ifp = vap->iv_ifp; 1424 if (IFNET_IS_UP_RUNNING(ifp)) { /* NB: avoid recursion */ 1425 vap->iv_flags_ext |= IEEE80211_FEXT_RESUME; 1426 ieee80211_stop_locked(vap); 1427 } 1428 } 1429 IEEE80211_UNLOCK(ic); 1430 1431 ieee80211_waitfor_parent(ic); 1432 } 1433 1434 /* 1435 * Start all vap's marked for resume. 1436 */ 1437 void 1438 ieee80211_resume_all(struct ieee80211com *ic) 1439 { 1440 struct ieee80211vap *vap; 1441 1442 IEEE80211_LOCK(ic); 1443 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1444 struct ifnet *ifp = vap->iv_ifp; 1445 if (!IFNET_IS_UP_RUNNING(ifp) && 1446 (vap->iv_flags_ext & IEEE80211_FEXT_RESUME)) { 1447 vap->iv_flags_ext &= ~IEEE80211_FEXT_RESUME; 1448 ieee80211_start_locked(vap); 1449 } 1450 } 1451 IEEE80211_UNLOCK(ic); 1452 } 1453 1454 void 1455 ieee80211_beacon_miss(struct ieee80211com *ic) 1456 { 1457 IEEE80211_LOCK(ic); 1458 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 1459 /* Process in a taskq, the handler may reenter the driver */ 1460 ieee80211_runtask(ic, &ic->ic_bmiss_task); 1461 } 1462 IEEE80211_UNLOCK(ic); 1463 } 1464 1465 static void 1466 beacon_miss(void *arg, int npending) 1467 { 1468 struct ieee80211com *ic = arg; 1469 struct ieee80211vap *vap; 1470 1471 IEEE80211_LOCK(ic); 1472 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1473 /* 1474 * We only pass events through for sta vap's in RUN state; 1475 * may be too restrictive but for now this saves all the 1476 * handlers duplicating these checks. 1477 */ 1478 if (vap->iv_opmode == IEEE80211_M_STA && 1479 vap->iv_state >= IEEE80211_S_RUN && 1480 vap->iv_bmiss != NULL) 1481 vap->iv_bmiss(vap); 1482 } 1483 IEEE80211_UNLOCK(ic); 1484 } 1485 1486 static void 1487 beacon_swmiss(void *arg, int npending) 1488 { 1489 struct ieee80211vap *vap = arg; 1490 struct ieee80211com *ic = vap->iv_ic; 1491 1492 IEEE80211_LOCK(ic); 1493 if (vap->iv_state == IEEE80211_S_RUN) { 1494 /* XXX Call multiple times if npending > zero? */ 1495 vap->iv_bmiss(vap); 1496 } 1497 IEEE80211_UNLOCK(ic); 1498 } 1499 1500 /* 1501 * Software beacon miss handling. Check if any beacons 1502 * were received in the last period. If not post a 1503 * beacon miss; otherwise reset the counter. 1504 */ 1505 void 1506 ieee80211_swbmiss(void *arg) 1507 { 1508 struct ieee80211vap *vap = arg; 1509 struct ieee80211com *ic = vap->iv_ic; 1510 1511 IEEE80211_LOCK_ASSERT(ic); 1512 1513 /* XXX sleep state? */ 1514 KASSERT(vap->iv_state == IEEE80211_S_RUN, 1515 ("wrong state %d", vap->iv_state)); 1516 1517 if (ic->ic_flags & IEEE80211_F_SCAN) { 1518 /* 1519 * If scanning just ignore and reset state. If we get a 1520 * bmiss after coming out of scan because we haven't had 1521 * time to receive a beacon then we should probe the AP 1522 * before posting a real bmiss (unless iv_bmiss_max has 1523 * been artifiically lowered). A cleaner solution might 1524 * be to disable the timer on scan start/end but to handle 1525 * case of multiple sta vap's we'd need to disable the 1526 * timers of all affected vap's. 1527 */ 1528 vap->iv_swbmiss_count = 0; 1529 } else if (vap->iv_swbmiss_count == 0) { 1530 if (vap->iv_bmiss != NULL) 1531 ieee80211_runtask(ic, &vap->iv_swbmiss_task); 1532 } else 1533 vap->iv_swbmiss_count = 0; 1534 callout_reset(&vap->iv_swbmiss, vap->iv_swbmiss_period, 1535 ieee80211_swbmiss, vap); 1536 } 1537 1538 /* 1539 * Start an 802.11h channel switch. We record the parameters, 1540 * mark the operation pending, notify each vap through the 1541 * beacon update mechanism so it can update the beacon frame 1542 * contents, and then switch vap's to CSA state to block outbound 1543 * traffic. Devices that handle CSA directly can use the state 1544 * switch to do the right thing so long as they call 1545 * ieee80211_csa_completeswitch when it's time to complete the 1546 * channel change. Devices that depend on the net80211 layer can 1547 * use ieee80211_beacon_update to handle the countdown and the 1548 * channel switch. 1549 */ 1550 void 1551 ieee80211_csa_startswitch(struct ieee80211com *ic, 1552 struct ieee80211_channel *c, int mode, int count) 1553 { 1554 struct ieee80211vap *vap; 1555 1556 IEEE80211_LOCK_ASSERT(ic); 1557 1558 ic->ic_csa_newchan = c; 1559 ic->ic_csa_mode = mode; 1560 ic->ic_csa_count = count; 1561 ic->ic_flags |= IEEE80211_F_CSAPENDING; 1562 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1563 if (vap->iv_opmode == IEEE80211_M_HOSTAP || 1564 vap->iv_opmode == IEEE80211_M_IBSS || 1565 vap->iv_opmode == IEEE80211_M_MBSS) 1566 ieee80211_beacon_notify(vap, IEEE80211_BEACON_CSA); 1567 /* switch to CSA state to block outbound traffic */ 1568 if (vap->iv_state == IEEE80211_S_RUN) 1569 ieee80211_new_state_locked(vap, IEEE80211_S_CSA, 0); 1570 } 1571 ieee80211_notify_csa(ic, c, mode, count); 1572 } 1573 1574 /* 1575 * Complete the channel switch by transitioning all CSA VAPs to RUN. 1576 * This is called by both the completion and cancellation functions 1577 * so each VAP is placed back in the RUN state and can thus transmit. 1578 */ 1579 static void 1580 csa_completeswitch(struct ieee80211com *ic) 1581 { 1582 struct ieee80211vap *vap; 1583 1584 ic->ic_csa_newchan = NULL; 1585 ic->ic_flags &= ~IEEE80211_F_CSAPENDING; 1586 1587 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1588 if (vap->iv_state == IEEE80211_S_CSA) 1589 ieee80211_new_state_locked(vap, IEEE80211_S_RUN, 0); 1590 } 1591 1592 /* 1593 * Complete an 802.11h channel switch started by ieee80211_csa_startswitch. 1594 * We clear state and move all vap's in CSA state to RUN state 1595 * so they can again transmit. 1596 * 1597 * Although this may not be completely correct, update the BSS channel 1598 * for each VAP to the newly configured channel. The setcurchan sets 1599 * the current operating channel for the interface (so the radio does 1600 * switch over) but the VAP BSS isn't updated, leading to incorrectly 1601 * reported information via ioctl. 1602 */ 1603 void 1604 ieee80211_csa_completeswitch(struct ieee80211com *ic) 1605 { 1606 struct ieee80211vap *vap; 1607 1608 IEEE80211_LOCK_ASSERT(ic); 1609 1610 KASSERT(ic->ic_flags & IEEE80211_F_CSAPENDING, ("csa not pending")); 1611 1612 ieee80211_setcurchan(ic, ic->ic_csa_newchan); 1613 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1614 if (vap->iv_state == IEEE80211_S_CSA) 1615 vap->iv_bss->ni_chan = ic->ic_curchan; 1616 1617 csa_completeswitch(ic); 1618 } 1619 1620 /* 1621 * Cancel an 802.11h channel switch started by ieee80211_csa_startswitch. 1622 * We clear state and move all vap's in CSA state to RUN state 1623 * so they can again transmit. 1624 */ 1625 void 1626 ieee80211_csa_cancelswitch(struct ieee80211com *ic) 1627 { 1628 IEEE80211_LOCK_ASSERT(ic); 1629 1630 csa_completeswitch(ic); 1631 } 1632 1633 /* 1634 * Complete a DFS CAC started by ieee80211_dfs_cac_start. 1635 * We clear state and move all vap's in CAC state to RUN state. 1636 */ 1637 void 1638 ieee80211_cac_completeswitch(struct ieee80211vap *vap0) 1639 { 1640 struct ieee80211com *ic = vap0->iv_ic; 1641 struct ieee80211vap *vap; 1642 1643 IEEE80211_LOCK(ic); 1644 /* 1645 * Complete CAC state change for lead vap first; then 1646 * clock all the other vap's waiting. 1647 */ 1648 KASSERT(vap0->iv_state == IEEE80211_S_CAC, 1649 ("wrong state %d", vap0->iv_state)); 1650 ieee80211_new_state_locked(vap0, IEEE80211_S_RUN, 0); 1651 1652 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1653 if (vap->iv_state == IEEE80211_S_CAC) 1654 ieee80211_new_state_locked(vap, IEEE80211_S_RUN, 0); 1655 IEEE80211_UNLOCK(ic); 1656 } 1657 1658 /* 1659 * Force all vap's other than the specified vap to the INIT state 1660 * and mark them as waiting for a scan to complete. These vaps 1661 * will be brought up when the scan completes and the scanning vap 1662 * reaches RUN state by wakeupwaiting. 1663 */ 1664 static void 1665 markwaiting(struct ieee80211vap *vap0) 1666 { 1667 struct ieee80211com *ic = vap0->iv_ic; 1668 struct ieee80211vap *vap; 1669 1670 IEEE80211_LOCK_ASSERT(ic); 1671 1672 /* 1673 * A vap list entry can not disappear since we are running on the 1674 * taskqueue and a vap destroy will queue and drain another state 1675 * change task. 1676 */ 1677 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1678 if (vap == vap0) 1679 continue; 1680 if (vap->iv_state != IEEE80211_S_INIT) { 1681 /* NB: iv_newstate may drop the lock */ 1682 vap->iv_newstate(vap, IEEE80211_S_INIT, 0); 1683 IEEE80211_LOCK_ASSERT(ic); 1684 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT; 1685 } 1686 } 1687 } 1688 1689 /* 1690 * Wakeup all vap's waiting for a scan to complete. This is the 1691 * companion to markwaiting (above) and is used to coordinate 1692 * multiple vaps scanning. 1693 * This is called from the state taskqueue. 1694 */ 1695 static void 1696 wakeupwaiting(struct ieee80211vap *vap0) 1697 { 1698 struct ieee80211com *ic = vap0->iv_ic; 1699 struct ieee80211vap *vap; 1700 1701 IEEE80211_LOCK_ASSERT(ic); 1702 1703 /* 1704 * A vap list entry can not disappear since we are running on the 1705 * taskqueue and a vap destroy will queue and drain another state 1706 * change task. 1707 */ 1708 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1709 if (vap == vap0) 1710 continue; 1711 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANWAIT) { 1712 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANWAIT; 1713 /* NB: sta's cannot go INIT->RUN */ 1714 /* NB: iv_newstate may drop the lock */ 1715 vap->iv_newstate(vap, 1716 vap->iv_opmode == IEEE80211_M_STA ? 1717 IEEE80211_S_SCAN : IEEE80211_S_RUN, 0); 1718 IEEE80211_LOCK_ASSERT(ic); 1719 } 1720 } 1721 } 1722 1723 /* 1724 * Handle post state change work common to all operating modes. 1725 */ 1726 static void 1727 ieee80211_newstate_cb(void *xvap, int npending) 1728 { 1729 struct ieee80211vap *vap = xvap; 1730 struct ieee80211com *ic = vap->iv_ic; 1731 enum ieee80211_state nstate, ostate; 1732 int arg, rc; 1733 1734 IEEE80211_LOCK(ic); 1735 nstate = vap->iv_nstate; 1736 arg = vap->iv_nstate_arg; 1737 1738 if (vap->iv_flags_ext & IEEE80211_FEXT_REINIT) { 1739 /* 1740 * We have been requested to drop back to the INIT before 1741 * proceeding to the new state. 1742 */ 1743 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1744 "%s: %s -> %s arg %d\n", __func__, 1745 ieee80211_state_name[vap->iv_state], 1746 ieee80211_state_name[IEEE80211_S_INIT], arg); 1747 vap->iv_newstate(vap, IEEE80211_S_INIT, arg); 1748 IEEE80211_LOCK_ASSERT(ic); 1749 vap->iv_flags_ext &= ~IEEE80211_FEXT_REINIT; 1750 } 1751 1752 ostate = vap->iv_state; 1753 if (nstate == IEEE80211_S_SCAN && ostate != IEEE80211_S_INIT) { 1754 /* 1755 * SCAN was forced; e.g. on beacon miss. Force other running 1756 * vap's to INIT state and mark them as waiting for the scan to 1757 * complete. This insures they don't interfere with our 1758 * scanning. Since we are single threaded the vaps can not 1759 * transition again while we are executing. 1760 * 1761 * XXX not always right, assumes ap follows sta 1762 */ 1763 markwaiting(vap); 1764 } 1765 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1766 "%s: %s -> %s arg %d\n", __func__, 1767 ieee80211_state_name[ostate], ieee80211_state_name[nstate], arg); 1768 1769 rc = vap->iv_newstate(vap, nstate, arg); 1770 IEEE80211_LOCK_ASSERT(ic); 1771 vap->iv_flags_ext &= ~IEEE80211_FEXT_STATEWAIT; 1772 if (rc != 0) { 1773 /* State transition failed */ 1774 KASSERT(rc != EINPROGRESS, ("iv_newstate was deferred")); 1775 KASSERT(nstate != IEEE80211_S_INIT, 1776 ("INIT state change failed")); 1777 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1778 "%s: %s returned error %d\n", __func__, 1779 ieee80211_state_name[nstate], rc); 1780 goto done; 1781 } 1782 1783 /* No actual transition, skip post processing */ 1784 if (ostate == nstate) 1785 goto done; 1786 1787 if (nstate == IEEE80211_S_RUN) { 1788 /* 1789 * OACTIVE may be set on the vap if the upper layer 1790 * tried to transmit (e.g. IPv6 NDP) before we reach 1791 * RUN state. Clear it and restart xmit. 1792 * 1793 * Note this can also happen as a result of SLEEP->RUN 1794 * (i.e. coming out of power save mode). 1795 */ 1796 #if defined(__DragonFly__) 1797 struct ifaltq_subque *ifsq; 1798 int wst; 1799 1800 ifsq = ifq_get_subq_default(&vap->iv_ifp->if_snd); 1801 ifsq_clr_oactive(ifsq); 1802 wst = wlan_serialize_push(); 1803 vap->iv_ifp->if_start(vap->iv_ifp, ifsq); 1804 wlan_serialize_pop(wst); 1805 #else 1806 vap->iv_ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 1807 #endif 1808 1809 /* 1810 * XXX TODO Kick-start a VAP queue - this should be a method! 1811 */ 1812 1813 /* bring up any vaps waiting on us */ 1814 wakeupwaiting(vap); 1815 } else if (nstate == IEEE80211_S_INIT) { 1816 /* 1817 * Flush the scan cache if we did the last scan (XXX?) 1818 * and flush any frames on send queues from this vap. 1819 * Note the mgt q is used only for legacy drivers and 1820 * will go away shortly. 1821 */ 1822 ieee80211_scan_flush(vap); 1823 1824 /* 1825 * XXX TODO: ic/vap queue flush 1826 */ 1827 } 1828 done: 1829 IEEE80211_UNLOCK(ic); 1830 } 1831 1832 /* 1833 * Public interface for initiating a state machine change. 1834 * This routine single-threads the request and coordinates 1835 * the scheduling of multiple vaps for the purpose of selecting 1836 * an operating channel. Specifically the following scenarios 1837 * are handled: 1838 * o only one vap can be selecting a channel so on transition to 1839 * SCAN state if another vap is already scanning then 1840 * mark the caller for later processing and return without 1841 * doing anything (XXX? expectations by caller of synchronous operation) 1842 * o only one vap can be doing CAC of a channel so on transition to 1843 * CAC state if another vap is already scanning for radar then 1844 * mark the caller for later processing and return without 1845 * doing anything (XXX? expectations by caller of synchronous operation) 1846 * o if another vap is already running when a request is made 1847 * to SCAN then an operating channel has been chosen; bypass 1848 * the scan and just join the channel 1849 * 1850 * Note that the state change call is done through the iv_newstate 1851 * method pointer so any driver routine gets invoked. The driver 1852 * will normally call back into operating mode-specific 1853 * ieee80211_newstate routines (below) unless it needs to completely 1854 * bypass the state machine (e.g. because the firmware has it's 1855 * own idea how things should work). Bypassing the net80211 layer 1856 * is usually a mistake and indicates lack of proper integration 1857 * with the net80211 layer. 1858 */ 1859 int 1860 ieee80211_new_state_locked(struct ieee80211vap *vap, 1861 enum ieee80211_state nstate, int arg) 1862 { 1863 struct ieee80211com *ic = vap->iv_ic; 1864 struct ieee80211vap *vp; 1865 enum ieee80211_state ostate; 1866 int nrunning, nscanning; 1867 1868 IEEE80211_LOCK_ASSERT(ic); 1869 1870 if (vap->iv_flags_ext & IEEE80211_FEXT_STATEWAIT) { 1871 if (vap->iv_nstate == IEEE80211_S_INIT) { 1872 /* 1873 * XXX The vap is being stopped, do no allow any other 1874 * state changes until this is completed. 1875 */ 1876 return -1; 1877 } else if (vap->iv_state != vap->iv_nstate) { 1878 #if 0 1879 /* Warn if the previous state hasn't completed. */ 1880 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1881 "%s: pending %s -> %s transition lost\n", __func__, 1882 ieee80211_state_name[vap->iv_state], 1883 ieee80211_state_name[vap->iv_nstate]); 1884 #else 1885 /* XXX temporarily enable to identify issues */ 1886 if_printf(vap->iv_ifp, 1887 "%s: pending %s -> %s transition lost\n", 1888 __func__, ieee80211_state_name[vap->iv_state], 1889 ieee80211_state_name[vap->iv_nstate]); 1890 #endif 1891 } 1892 } 1893 1894 nrunning = nscanning = 0; 1895 /* XXX can track this state instead of calculating */ 1896 TAILQ_FOREACH(vp, &ic->ic_vaps, iv_next) { 1897 if (vp != vap) { 1898 if (vp->iv_state >= IEEE80211_S_RUN) 1899 nrunning++; 1900 /* XXX doesn't handle bg scan */ 1901 /* NB: CAC+AUTH+ASSOC treated like SCAN */ 1902 else if (vp->iv_state > IEEE80211_S_INIT) 1903 nscanning++; 1904 } 1905 } 1906 ostate = vap->iv_state; 1907 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1908 "%s: %s -> %s (nrunning %d nscanning %d)\n", __func__, 1909 ieee80211_state_name[ostate], ieee80211_state_name[nstate], 1910 nrunning, nscanning); 1911 switch (nstate) { 1912 case IEEE80211_S_SCAN: 1913 if (ostate == IEEE80211_S_INIT) { 1914 /* 1915 * INIT -> SCAN happens on initial bringup. 1916 */ 1917 KASSERT(!(nscanning && nrunning), 1918 ("%d scanning and %d running", nscanning, nrunning)); 1919 if (nscanning) { 1920 /* 1921 * Someone is scanning, defer our state 1922 * change until the work has completed. 1923 */ 1924 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1925 "%s: defer %s -> %s\n", 1926 __func__, ieee80211_state_name[ostate], 1927 ieee80211_state_name[nstate]); 1928 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT; 1929 return 0; 1930 } 1931 if (nrunning) { 1932 /* 1933 * Someone is operating; just join the channel 1934 * they have chosen. 1935 */ 1936 /* XXX kill arg? */ 1937 /* XXX check each opmode, adhoc? */ 1938 if (vap->iv_opmode == IEEE80211_M_STA) 1939 nstate = IEEE80211_S_SCAN; 1940 else 1941 nstate = IEEE80211_S_RUN; 1942 #ifdef IEEE80211_DEBUG 1943 if (nstate != IEEE80211_S_SCAN) { 1944 IEEE80211_DPRINTF(vap, 1945 IEEE80211_MSG_STATE, 1946 "%s: override, now %s -> %s\n", 1947 __func__, 1948 ieee80211_state_name[ostate], 1949 ieee80211_state_name[nstate]); 1950 } 1951 #endif 1952 } 1953 } 1954 break; 1955 case IEEE80211_S_RUN: 1956 if (vap->iv_opmode == IEEE80211_M_WDS && 1957 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) && 1958 nscanning) { 1959 /* 1960 * Legacy WDS with someone else scanning; don't 1961 * go online until that completes as we should 1962 * follow the other vap to the channel they choose. 1963 */ 1964 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1965 "%s: defer %s -> %s (legacy WDS)\n", __func__, 1966 ieee80211_state_name[ostate], 1967 ieee80211_state_name[nstate]); 1968 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT; 1969 return 0; 1970 } 1971 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 1972 IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) && 1973 (vap->iv_flags_ext & IEEE80211_FEXT_DFS) && 1974 !IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) { 1975 /* 1976 * This is a DFS channel, transition to CAC state 1977 * instead of RUN. This allows us to initiate 1978 * Channel Availability Check (CAC) as specified 1979 * by 11h/DFS. 1980 */ 1981 nstate = IEEE80211_S_CAC; 1982 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1983 "%s: override %s -> %s (DFS)\n", __func__, 1984 ieee80211_state_name[ostate], 1985 ieee80211_state_name[nstate]); 1986 } 1987 break; 1988 case IEEE80211_S_INIT: 1989 /* cancel any scan in progress */ 1990 ieee80211_cancel_scan(vap); 1991 if (ostate == IEEE80211_S_INIT ) { 1992 /* XXX don't believe this */ 1993 /* INIT -> INIT. nothing to do */ 1994 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANWAIT; 1995 } 1996 /* fall thru... */ 1997 default: 1998 break; 1999 } 2000 /* defer the state change to a thread */ 2001 vap->iv_nstate = nstate; 2002 vap->iv_nstate_arg = arg; 2003 vap->iv_flags_ext |= IEEE80211_FEXT_STATEWAIT; 2004 ieee80211_runtask(ic, &vap->iv_nstate_task); 2005 return EINPROGRESS; 2006 } 2007 2008 int 2009 ieee80211_new_state(struct ieee80211vap *vap, 2010 enum ieee80211_state nstate, int arg) 2011 { 2012 struct ieee80211com *ic = vap->iv_ic; 2013 int rc; 2014 2015 IEEE80211_LOCK(ic); 2016 rc = ieee80211_new_state_locked(vap, nstate, arg); 2017 IEEE80211_UNLOCK(ic); 2018 return rc; 2019 } 2020