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 #include <net80211/ieee80211_var.h> 50 #include <net80211/ieee80211_adhoc.h> 51 #include <net80211/ieee80211_sta.h> 52 #include <net80211/ieee80211_hostap.h> 53 #include <net80211/ieee80211_wds.h> 54 #ifdef IEEE80211_SUPPORT_MESH 55 #include <net80211/ieee80211_mesh.h> 56 #endif 57 #include <net80211/ieee80211_monitor.h> 58 #include <net80211/ieee80211_input.h> 59 60 /* XXX tunables */ 61 #define AGGRESSIVE_MODE_SWITCH_HYSTERESIS 3 /* pkts / 100ms */ 62 #define HIGH_PRI_SWITCH_THRESH 10 /* pkts / 100ms */ 63 64 const char *ieee80211_mgt_subtype_name[] = { 65 "assoc_req", "assoc_resp", "reassoc_req", "reassoc_resp", 66 "probe_req", "probe_resp", "reserved#6", "reserved#7", 67 "beacon", "atim", "disassoc", "auth", 68 "deauth", "action", "action_noack", "reserved#15" 69 }; 70 const char *ieee80211_ctl_subtype_name[] = { 71 "reserved#0", "reserved#1", "reserved#2", "reserved#3", 72 "reserved#3", "reserved#5", "reserved#6", "reserved#7", 73 "reserved#8", "reserved#9", "ps_poll", "rts", 74 "cts", "ack", "cf_end", "cf_end_ack" 75 }; 76 const char *ieee80211_opmode_name[IEEE80211_OPMODE_MAX] = { 77 "IBSS", /* IEEE80211_M_IBSS */ 78 "STA", /* IEEE80211_M_STA */ 79 "WDS", /* IEEE80211_M_WDS */ 80 "AHDEMO", /* IEEE80211_M_AHDEMO */ 81 "HOSTAP", /* IEEE80211_M_HOSTAP */ 82 "MONITOR", /* IEEE80211_M_MONITOR */ 83 "MBSS" /* IEEE80211_M_MBSS */ 84 }; 85 const char *ieee80211_state_name[IEEE80211_S_MAX] = { 86 "INIT", /* IEEE80211_S_INIT */ 87 "SCAN", /* IEEE80211_S_SCAN */ 88 "AUTH", /* IEEE80211_S_AUTH */ 89 "ASSOC", /* IEEE80211_S_ASSOC */ 90 "CAC", /* IEEE80211_S_CAC */ 91 "RUN", /* IEEE80211_S_RUN */ 92 "CSA", /* IEEE80211_S_CSA */ 93 "SLEEP", /* IEEE80211_S_SLEEP */ 94 }; 95 const char *ieee80211_wme_acnames[] = { 96 "WME_AC_BE", 97 "WME_AC_BK", 98 "WME_AC_VI", 99 "WME_AC_VO", 100 "WME_UPSD", 101 }; 102 103 static void beacon_miss(void *, int); 104 static void beacon_swmiss(void *, int); 105 static void parent_updown(void *, int); 106 static void update_mcast(void *, int); 107 static void update_promisc(void *, int); 108 static void update_channel(void *, int); 109 static void update_chw(void *, int); 110 static void ieee80211_newstate_cb(void *, int); 111 112 static int 113 null_raw_xmit(struct ieee80211_node *ni, struct mbuf *m, 114 const struct ieee80211_bpf_params *params) 115 { 116 struct ifnet *ifp = ni->ni_ic->ic_ifp; 117 118 if_printf(ifp, "missing ic_raw_xmit callback, drop frame\n"); 119 m_freem(m); 120 return ENETDOWN; 121 } 122 123 void 124 ieee80211_proto_attach(struct ieee80211com *ic) 125 { 126 struct ifnet *ifp = ic->ic_ifp; 127 128 /* override the 802.3 setting */ 129 ifp->if_hdrlen = ic->ic_headroom 130 + sizeof(struct ieee80211_qosframe_addr4) 131 + IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN 132 + IEEE80211_WEP_EXTIVLEN; 133 /* XXX no way to recalculate on ifdetach */ 134 if (ALIGN(ifp->if_hdrlen) > max_linkhdr) { 135 /* XXX sanity check... */ 136 max_linkhdr = ALIGN(ifp->if_hdrlen); 137 max_hdr = max_linkhdr + max_protohdr; 138 max_datalen = MHLEN - max_hdr; 139 } 140 ic->ic_protmode = IEEE80211_PROT_CTSONLY; 141 142 TASK_INIT(&ic->ic_parent_task, 0, parent_updown, ifp); 143 TASK_INIT(&ic->ic_mcast_task, 0, update_mcast, ic); 144 TASK_INIT(&ic->ic_promisc_task, 0, update_promisc, ic); 145 TASK_INIT(&ic->ic_chan_task, 0, update_channel, ic); 146 TASK_INIT(&ic->ic_bmiss_task, 0, beacon_miss, ic); 147 TASK_INIT(&ic->ic_chw_task, 0, update_chw, ic); 148 149 ic->ic_wme.wme_hipri_switch_hysteresis = 150 AGGRESSIVE_MODE_SWITCH_HYSTERESIS; 151 152 /* initialize management frame handlers */ 153 ic->ic_send_mgmt = ieee80211_send_mgmt; 154 ic->ic_raw_xmit = null_raw_xmit; 155 156 ieee80211_adhoc_attach(ic); 157 ieee80211_sta_attach(ic); 158 ieee80211_wds_attach(ic); 159 ieee80211_hostap_attach(ic); 160 #ifdef IEEE80211_SUPPORT_MESH 161 ieee80211_mesh_attach(ic); 162 #endif 163 ieee80211_monitor_attach(ic); 164 } 165 166 void 167 ieee80211_proto_detach(struct ieee80211com *ic) 168 { 169 ieee80211_monitor_detach(ic); 170 #ifdef IEEE80211_SUPPORT_MESH 171 ieee80211_mesh_detach(ic); 172 #endif 173 ieee80211_hostap_detach(ic); 174 ieee80211_wds_detach(ic); 175 ieee80211_adhoc_detach(ic); 176 ieee80211_sta_detach(ic); 177 } 178 179 static void 180 null_update_beacon(struct ieee80211vap *vap, int item) 181 { 182 } 183 184 void 185 ieee80211_proto_vattach(struct ieee80211vap *vap) 186 { 187 struct ieee80211com *ic = vap->iv_ic; 188 struct ifnet *ifp = vap->iv_ifp; 189 int i; 190 191 /* override the 802.3 setting */ 192 ifp->if_hdrlen = ic->ic_ifp->if_hdrlen; 193 194 vap->iv_rtsthreshold = IEEE80211_RTS_DEFAULT; 195 vap->iv_fragthreshold = IEEE80211_FRAG_DEFAULT; 196 vap->iv_bmiss_max = IEEE80211_BMISS_MAX; 197 callout_init_mtx(&vap->iv_swbmiss, IEEE80211_LOCK_OBJ(ic), 0); 198 callout_init(&vap->iv_mgtsend, CALLOUT_MPSAFE); 199 TASK_INIT(&vap->iv_nstate_task, 0, ieee80211_newstate_cb, vap); 200 TASK_INIT(&vap->iv_swbmiss_task, 0, beacon_swmiss, vap); 201 /* 202 * Install default tx rate handling: no fixed rate, lowest 203 * supported rate for mgmt and multicast frames. Default 204 * max retry count. These settings can be changed by the 205 * driver and/or user applications. 206 */ 207 for (i = IEEE80211_MODE_11A; i < IEEE80211_MODE_MAX; i++) { 208 const struct ieee80211_rateset *rs = &ic->ic_sup_rates[i]; 209 210 vap->iv_txparms[i].ucastrate = IEEE80211_FIXED_RATE_NONE; 211 212 /* 213 * Setting the management rate to MCS 0 assumes that the 214 * BSS Basic rate set is empty and the BSS Basic MCS set 215 * is not. 216 * 217 * Since we're not checking this, default to the lowest 218 * defined rate for this mode. 219 * 220 * At least one 11n AP (DLINK DIR-825) is reported to drop 221 * some MCS management traffic (eg BA response frames.) 222 * 223 * See also: 9.6.0 of the 802.11n-2009 specification. 224 */ 225 #ifdef NOTYET 226 if (i == IEEE80211_MODE_11NA || i == IEEE80211_MODE_11NG) { 227 vap->iv_txparms[i].mgmtrate = 0 | IEEE80211_RATE_MCS; 228 vap->iv_txparms[i].mcastrate = 0 | IEEE80211_RATE_MCS; 229 } else { 230 vap->iv_txparms[i].mgmtrate = 231 rs->rs_rates[0] & IEEE80211_RATE_VAL; 232 vap->iv_txparms[i].mcastrate = 233 rs->rs_rates[0] & IEEE80211_RATE_VAL; 234 } 235 #endif 236 vap->iv_txparms[i].mgmtrate = rs->rs_rates[0] & IEEE80211_RATE_VAL; 237 vap->iv_txparms[i].mcastrate = rs->rs_rates[0] & IEEE80211_RATE_VAL; 238 vap->iv_txparms[i].maxretry = IEEE80211_TXMAX_DEFAULT; 239 } 240 vap->iv_roaming = IEEE80211_ROAMING_AUTO; 241 242 vap->iv_update_beacon = null_update_beacon; 243 vap->iv_deliver_data = ieee80211_deliver_data; 244 245 /* attach support for operating mode */ 246 ic->ic_vattach[vap->iv_opmode](vap); 247 } 248 249 void 250 ieee80211_proto_vdetach(struct ieee80211vap *vap) 251 { 252 #define FREEAPPIE(ie) do { \ 253 if (ie != NULL) \ 254 free(ie, M_80211_NODE_IE); \ 255 } while (0) 256 /* 257 * Detach operating mode module. 258 */ 259 if (vap->iv_opdetach != NULL) 260 vap->iv_opdetach(vap); 261 /* 262 * This should not be needed as we detach when reseting 263 * the state but be conservative here since the 264 * authenticator may do things like spawn kernel threads. 265 */ 266 if (vap->iv_auth->ia_detach != NULL) 267 vap->iv_auth->ia_detach(vap); 268 /* 269 * Detach any ACL'ator. 270 */ 271 if (vap->iv_acl != NULL) 272 vap->iv_acl->iac_detach(vap); 273 274 FREEAPPIE(vap->iv_appie_beacon); 275 FREEAPPIE(vap->iv_appie_probereq); 276 FREEAPPIE(vap->iv_appie_proberesp); 277 FREEAPPIE(vap->iv_appie_assocreq); 278 FREEAPPIE(vap->iv_appie_assocresp); 279 FREEAPPIE(vap->iv_appie_wpa); 280 #undef FREEAPPIE 281 } 282 283 /* 284 * Simple-minded authenticator module support. 285 */ 286 287 #define IEEE80211_AUTH_MAX (IEEE80211_AUTH_WPA+1) 288 /* XXX well-known names */ 289 static const char *auth_modnames[IEEE80211_AUTH_MAX] = { 290 "wlan_internal", /* IEEE80211_AUTH_NONE */ 291 "wlan_internal", /* IEEE80211_AUTH_OPEN */ 292 "wlan_internal", /* IEEE80211_AUTH_SHARED */ 293 "wlan_xauth", /* IEEE80211_AUTH_8021X */ 294 "wlan_internal", /* IEEE80211_AUTH_AUTO */ 295 "wlan_xauth", /* IEEE80211_AUTH_WPA */ 296 }; 297 static const struct ieee80211_authenticator *authenticators[IEEE80211_AUTH_MAX]; 298 299 static const struct ieee80211_authenticator auth_internal = { 300 .ia_name = "wlan_internal", 301 .ia_attach = NULL, 302 .ia_detach = NULL, 303 .ia_node_join = NULL, 304 .ia_node_leave = NULL, 305 }; 306 307 /* 308 * Setup internal authenticators once; they are never unregistered. 309 */ 310 static void 311 ieee80211_auth_setup(void) 312 { 313 ieee80211_authenticator_register(IEEE80211_AUTH_OPEN, &auth_internal); 314 ieee80211_authenticator_register(IEEE80211_AUTH_SHARED, &auth_internal); 315 ieee80211_authenticator_register(IEEE80211_AUTH_AUTO, &auth_internal); 316 } 317 SYSINIT(wlan_auth, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_auth_setup, NULL); 318 319 const struct ieee80211_authenticator * 320 ieee80211_authenticator_get(int auth) 321 { 322 if (auth >= IEEE80211_AUTH_MAX) 323 return NULL; 324 if (authenticators[auth] == NULL) 325 ieee80211_load_module(auth_modnames[auth]); 326 return authenticators[auth]; 327 } 328 329 void 330 ieee80211_authenticator_register(int type, 331 const struct ieee80211_authenticator *auth) 332 { 333 if (type >= IEEE80211_AUTH_MAX) 334 return; 335 authenticators[type] = auth; 336 } 337 338 void 339 ieee80211_authenticator_unregister(int type) 340 { 341 342 if (type >= IEEE80211_AUTH_MAX) 343 return; 344 authenticators[type] = NULL; 345 } 346 347 /* 348 * Very simple-minded ACL module support. 349 */ 350 /* XXX just one for now */ 351 static const struct ieee80211_aclator *acl = NULL; 352 353 void 354 ieee80211_aclator_register(const struct ieee80211_aclator *iac) 355 { 356 printf("wlan: %s acl policy registered\n", iac->iac_name); 357 acl = iac; 358 } 359 360 void 361 ieee80211_aclator_unregister(const struct ieee80211_aclator *iac) 362 { 363 if (acl == iac) 364 acl = NULL; 365 printf("wlan: %s acl policy unregistered\n", iac->iac_name); 366 } 367 368 const struct ieee80211_aclator * 369 ieee80211_aclator_get(const char *name) 370 { 371 if (acl == NULL) 372 ieee80211_load_module("wlan_acl"); 373 return acl != NULL && strcmp(acl->iac_name, name) == 0 ? acl : NULL; 374 } 375 376 void 377 ieee80211_print_essid(const uint8_t *essid, int len) 378 { 379 const uint8_t *p; 380 int i; 381 382 if (len > IEEE80211_NWID_LEN) 383 len = IEEE80211_NWID_LEN; 384 /* determine printable or not */ 385 for (i = 0, p = essid; i < len; i++, p++) { 386 if (*p < ' ' || *p > 0x7e) 387 break; 388 } 389 if (i == len) { 390 printf("\""); 391 for (i = 0, p = essid; i < len; i++, p++) 392 printf("%c", *p); 393 printf("\""); 394 } else { 395 printf("0x"); 396 for (i = 0, p = essid; i < len; i++, p++) 397 printf("%02x", *p); 398 } 399 } 400 401 void 402 ieee80211_dump_pkt(struct ieee80211com *ic, 403 const uint8_t *buf, int len, int rate, int rssi) 404 { 405 const struct ieee80211_frame *wh; 406 int i; 407 408 wh = (const struct ieee80211_frame *)buf; 409 switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) { 410 case IEEE80211_FC1_DIR_NODS: 411 printf("NODS %s", ether_sprintf(wh->i_addr2)); 412 printf("->%s", ether_sprintf(wh->i_addr1)); 413 printf("(%s)", ether_sprintf(wh->i_addr3)); 414 break; 415 case IEEE80211_FC1_DIR_TODS: 416 printf("TODS %s", ether_sprintf(wh->i_addr2)); 417 printf("->%s", ether_sprintf(wh->i_addr3)); 418 printf("(%s)", ether_sprintf(wh->i_addr1)); 419 break; 420 case IEEE80211_FC1_DIR_FROMDS: 421 printf("FRDS %s", ether_sprintf(wh->i_addr3)); 422 printf("->%s", ether_sprintf(wh->i_addr1)); 423 printf("(%s)", ether_sprintf(wh->i_addr2)); 424 break; 425 case IEEE80211_FC1_DIR_DSTODS: 426 printf("DSDS %s", ether_sprintf((const uint8_t *)&wh[1])); 427 printf("->%s", ether_sprintf(wh->i_addr3)); 428 printf("(%s", ether_sprintf(wh->i_addr2)); 429 printf("->%s)", ether_sprintf(wh->i_addr1)); 430 break; 431 } 432 switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) { 433 case IEEE80211_FC0_TYPE_DATA: 434 printf(" data"); 435 break; 436 case IEEE80211_FC0_TYPE_MGT: 437 printf(" %s", ieee80211_mgt_subtype_name[ 438 (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) 439 >> IEEE80211_FC0_SUBTYPE_SHIFT]); 440 break; 441 default: 442 printf(" type#%d", wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK); 443 break; 444 } 445 if (IEEE80211_QOS_HAS_SEQ(wh)) { 446 const struct ieee80211_qosframe *qwh = 447 (const struct ieee80211_qosframe *)buf; 448 printf(" QoS [TID %u%s]", qwh->i_qos[0] & IEEE80211_QOS_TID, 449 qwh->i_qos[0] & IEEE80211_QOS_ACKPOLICY ? " ACM" : ""); 450 } 451 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 452 int off; 453 454 off = ieee80211_anyhdrspace(ic, wh); 455 printf(" WEP [IV %.02x %.02x %.02x", 456 buf[off+0], buf[off+1], buf[off+2]); 457 if (buf[off+IEEE80211_WEP_IVLEN] & IEEE80211_WEP_EXTIV) 458 printf(" %.02x %.02x %.02x", 459 buf[off+4], buf[off+5], buf[off+6]); 460 printf(" KID %u]", buf[off+IEEE80211_WEP_IVLEN] >> 6); 461 } 462 if (rate >= 0) 463 printf(" %dM", rate / 2); 464 if (rssi >= 0) 465 printf(" +%d", rssi); 466 printf("\n"); 467 if (len > 0) { 468 for (i = 0; i < len; i++) { 469 if ((i & 1) == 0) 470 printf(" "); 471 printf("%02x", buf[i]); 472 } 473 printf("\n"); 474 } 475 } 476 477 static __inline int 478 findrix(const struct ieee80211_rateset *rs, int r) 479 { 480 int i; 481 482 for (i = 0; i < rs->rs_nrates; i++) 483 if ((rs->rs_rates[i] & IEEE80211_RATE_VAL) == r) 484 return i; 485 return -1; 486 } 487 488 int 489 ieee80211_fix_rate(struct ieee80211_node *ni, 490 struct ieee80211_rateset *nrs, int flags) 491 { 492 #define RV(v) ((v) & IEEE80211_RATE_VAL) 493 struct ieee80211vap *vap = ni->ni_vap; 494 struct ieee80211com *ic = ni->ni_ic; 495 int i, j, rix, error; 496 int okrate, badrate, fixedrate, ucastrate; 497 const struct ieee80211_rateset *srs; 498 uint8_t r; 499 500 error = 0; 501 okrate = badrate = 0; 502 ucastrate = vap->iv_txparms[ieee80211_chan2mode(ni->ni_chan)].ucastrate; 503 if (ucastrate != IEEE80211_FIXED_RATE_NONE) { 504 /* 505 * Workaround awkwardness with fixed rate. We are called 506 * to check both the legacy rate set and the HT rate set 507 * but we must apply any legacy fixed rate check only to the 508 * legacy rate set and vice versa. We cannot tell what type 509 * of rate set we've been given (legacy or HT) but we can 510 * distinguish the fixed rate type (MCS have 0x80 set). 511 * So to deal with this the caller communicates whether to 512 * check MCS or legacy rate using the flags and we use the 513 * type of any fixed rate to avoid applying an MCS to a 514 * legacy rate and vice versa. 515 */ 516 if (ucastrate & 0x80) { 517 if (flags & IEEE80211_F_DOFRATE) 518 flags &= ~IEEE80211_F_DOFRATE; 519 } else if ((ucastrate & 0x80) == 0) { 520 if (flags & IEEE80211_F_DOFMCS) 521 flags &= ~IEEE80211_F_DOFMCS; 522 } 523 /* NB: required to make MCS match below work */ 524 ucastrate &= IEEE80211_RATE_VAL; 525 } 526 fixedrate = IEEE80211_FIXED_RATE_NONE; 527 /* 528 * XXX we are called to process both MCS and legacy rates; 529 * we must use the appropriate basic rate set or chaos will 530 * ensue; for now callers that want MCS must supply 531 * IEEE80211_F_DOBRS; at some point we'll need to split this 532 * function so there are two variants, one for MCS and one 533 * for legacy rates. 534 */ 535 if (flags & IEEE80211_F_DOBRS) 536 srs = (const struct ieee80211_rateset *) 537 ieee80211_get_suphtrates(ic, ni->ni_chan); 538 else 539 srs = ieee80211_get_suprates(ic, ni->ni_chan); 540 for (i = 0; i < nrs->rs_nrates; ) { 541 if (flags & IEEE80211_F_DOSORT) { 542 /* 543 * Sort rates. 544 */ 545 for (j = i + 1; j < nrs->rs_nrates; j++) { 546 if (RV(nrs->rs_rates[i]) > RV(nrs->rs_rates[j])) { 547 r = nrs->rs_rates[i]; 548 nrs->rs_rates[i] = nrs->rs_rates[j]; 549 nrs->rs_rates[j] = r; 550 } 551 } 552 } 553 r = nrs->rs_rates[i] & IEEE80211_RATE_VAL; 554 badrate = r; 555 /* 556 * Check for fixed rate. 557 */ 558 if (r == ucastrate) 559 fixedrate = r; 560 /* 561 * Check against supported rates. 562 */ 563 rix = findrix(srs, r); 564 if (flags & IEEE80211_F_DONEGO) { 565 if (rix < 0) { 566 /* 567 * A rate in the node's rate set is not 568 * supported. If this is a basic rate and we 569 * are operating as a STA then this is an error. 570 * Otherwise we just discard/ignore the rate. 571 */ 572 if ((flags & IEEE80211_F_JOIN) && 573 (nrs->rs_rates[i] & IEEE80211_RATE_BASIC)) 574 error++; 575 } else if ((flags & IEEE80211_F_JOIN) == 0) { 576 /* 577 * Overwrite with the supported rate 578 * value so any basic rate bit is set. 579 */ 580 nrs->rs_rates[i] = srs->rs_rates[rix]; 581 } 582 } 583 if ((flags & IEEE80211_F_DODEL) && rix < 0) { 584 /* 585 * Delete unacceptable rates. 586 */ 587 nrs->rs_nrates--; 588 for (j = i; j < nrs->rs_nrates; j++) 589 nrs->rs_rates[j] = nrs->rs_rates[j + 1]; 590 nrs->rs_rates[j] = 0; 591 continue; 592 } 593 if (rix >= 0) 594 okrate = nrs->rs_rates[i]; 595 i++; 596 } 597 if (okrate == 0 || error != 0 || 598 ((flags & (IEEE80211_F_DOFRATE|IEEE80211_F_DOFMCS)) && 599 fixedrate != ucastrate)) { 600 IEEE80211_NOTE(vap, IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni, 601 "%s: flags 0x%x okrate %d error %d fixedrate 0x%x " 602 "ucastrate %x\n", __func__, fixedrate, ucastrate, flags); 603 return badrate | IEEE80211_RATE_BASIC; 604 } else 605 return RV(okrate); 606 #undef RV 607 } 608 609 /* 610 * Reset 11g-related state. 611 */ 612 void 613 ieee80211_reset_erp(struct ieee80211com *ic) 614 { 615 ic->ic_flags &= ~IEEE80211_F_USEPROT; 616 ic->ic_nonerpsta = 0; 617 ic->ic_longslotsta = 0; 618 /* 619 * Short slot time is enabled only when operating in 11g 620 * and not in an IBSS. We must also honor whether or not 621 * the driver is capable of doing it. 622 */ 623 ieee80211_set_shortslottime(ic, 624 IEEE80211_IS_CHAN_A(ic->ic_curchan) || 625 IEEE80211_IS_CHAN_HT(ic->ic_curchan) || 626 (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 627 ic->ic_opmode == IEEE80211_M_HOSTAP && 628 (ic->ic_caps & IEEE80211_C_SHSLOT))); 629 /* 630 * Set short preamble and ERP barker-preamble flags. 631 */ 632 if (IEEE80211_IS_CHAN_A(ic->ic_curchan) || 633 (ic->ic_caps & IEEE80211_C_SHPREAMBLE)) { 634 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 635 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 636 } else { 637 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 638 ic->ic_flags |= IEEE80211_F_USEBARKER; 639 } 640 } 641 642 /* 643 * Set the short slot time state and notify the driver. 644 */ 645 void 646 ieee80211_set_shortslottime(struct ieee80211com *ic, int onoff) 647 { 648 if (onoff) 649 ic->ic_flags |= IEEE80211_F_SHSLOT; 650 else 651 ic->ic_flags &= ~IEEE80211_F_SHSLOT; 652 /* notify driver */ 653 if (ic->ic_updateslot != NULL) 654 ic->ic_updateslot(ic->ic_ifp); 655 } 656 657 /* 658 * Check if the specified rate set supports ERP. 659 * NB: the rate set is assumed to be sorted. 660 */ 661 int 662 ieee80211_iserp_rateset(const struct ieee80211_rateset *rs) 663 { 664 static const int rates[] = { 2, 4, 11, 22, 12, 24, 48 }; 665 int i, j; 666 667 if (rs->rs_nrates < nitems(rates)) 668 return 0; 669 for (i = 0; i < nitems(rates); i++) { 670 for (j = 0; j < rs->rs_nrates; j++) { 671 int r = rs->rs_rates[j] & IEEE80211_RATE_VAL; 672 if (rates[i] == r) 673 goto next; 674 if (r > rates[i]) 675 return 0; 676 } 677 return 0; 678 next: 679 ; 680 } 681 return 1; 682 } 683 684 /* 685 * Mark the basic rates for the rate table based on the 686 * operating mode. For real 11g we mark all the 11b rates 687 * and 6, 12, and 24 OFDM. For 11b compatibility we mark only 688 * 11b rates. There's also a pseudo 11a-mode used to mark only 689 * the basic OFDM rates. 690 */ 691 static void 692 setbasicrates(struct ieee80211_rateset *rs, 693 enum ieee80211_phymode mode, int add) 694 { 695 static const struct ieee80211_rateset basic[IEEE80211_MODE_MAX] = { 696 [IEEE80211_MODE_11A] = { 3, { 12, 24, 48 } }, 697 [IEEE80211_MODE_11B] = { 2, { 2, 4 } }, 698 /* NB: mixed b/g */ 699 [IEEE80211_MODE_11G] = { 4, { 2, 4, 11, 22 } }, 700 [IEEE80211_MODE_TURBO_A] = { 3, { 12, 24, 48 } }, 701 [IEEE80211_MODE_TURBO_G] = { 4, { 2, 4, 11, 22 } }, 702 [IEEE80211_MODE_STURBO_A] = { 3, { 12, 24, 48 } }, 703 [IEEE80211_MODE_HALF] = { 3, { 6, 12, 24 } }, 704 [IEEE80211_MODE_QUARTER] = { 3, { 3, 6, 12 } }, 705 [IEEE80211_MODE_11NA] = { 3, { 12, 24, 48 } }, 706 /* NB: mixed b/g */ 707 [IEEE80211_MODE_11NG] = { 4, { 2, 4, 11, 22 } }, 708 }; 709 int i, j; 710 711 for (i = 0; i < rs->rs_nrates; i++) { 712 if (!add) 713 rs->rs_rates[i] &= IEEE80211_RATE_VAL; 714 for (j = 0; j < basic[mode].rs_nrates; j++) 715 if (basic[mode].rs_rates[j] == rs->rs_rates[i]) { 716 rs->rs_rates[i] |= IEEE80211_RATE_BASIC; 717 break; 718 } 719 } 720 } 721 722 /* 723 * Set the basic rates in a rate set. 724 */ 725 void 726 ieee80211_setbasicrates(struct ieee80211_rateset *rs, 727 enum ieee80211_phymode mode) 728 { 729 setbasicrates(rs, mode, 0); 730 } 731 732 /* 733 * Add basic rates to a rate set. 734 */ 735 void 736 ieee80211_addbasicrates(struct ieee80211_rateset *rs, 737 enum ieee80211_phymode mode) 738 { 739 setbasicrates(rs, mode, 1); 740 } 741 742 /* 743 * WME protocol support. 744 * 745 * The default 11a/b/g/n parameters come from the WiFi Alliance WMM 746 * System Interopability Test Plan (v1.4, Appendix F) and the 802.11n 747 * Draft 2.0 Test Plan (Appendix D). 748 * 749 * Static/Dynamic Turbo mode settings come from Atheros. 750 */ 751 typedef struct phyParamType { 752 uint8_t aifsn; 753 uint8_t logcwmin; 754 uint8_t logcwmax; 755 uint16_t txopLimit; 756 uint8_t acm; 757 } paramType; 758 759 static const struct phyParamType phyParamForAC_BE[IEEE80211_MODE_MAX] = { 760 [IEEE80211_MODE_AUTO] = { 3, 4, 6, 0, 0 }, 761 [IEEE80211_MODE_11A] = { 3, 4, 6, 0, 0 }, 762 [IEEE80211_MODE_11B] = { 3, 4, 6, 0, 0 }, 763 [IEEE80211_MODE_11G] = { 3, 4, 6, 0, 0 }, 764 [IEEE80211_MODE_FH] = { 3, 4, 6, 0, 0 }, 765 [IEEE80211_MODE_TURBO_A]= { 2, 3, 5, 0, 0 }, 766 [IEEE80211_MODE_TURBO_G]= { 2, 3, 5, 0, 0 }, 767 [IEEE80211_MODE_STURBO_A]={ 2, 3, 5, 0, 0 }, 768 [IEEE80211_MODE_HALF] = { 3, 4, 6, 0, 0 }, 769 [IEEE80211_MODE_QUARTER]= { 3, 4, 6, 0, 0 }, 770 [IEEE80211_MODE_11NA] = { 3, 4, 6, 0, 0 }, 771 [IEEE80211_MODE_11NG] = { 3, 4, 6, 0, 0 }, 772 }; 773 static const struct phyParamType phyParamForAC_BK[IEEE80211_MODE_MAX] = { 774 [IEEE80211_MODE_AUTO] = { 7, 4, 10, 0, 0 }, 775 [IEEE80211_MODE_11A] = { 7, 4, 10, 0, 0 }, 776 [IEEE80211_MODE_11B] = { 7, 4, 10, 0, 0 }, 777 [IEEE80211_MODE_11G] = { 7, 4, 10, 0, 0 }, 778 [IEEE80211_MODE_FH] = { 7, 4, 10, 0, 0 }, 779 [IEEE80211_MODE_TURBO_A]= { 7, 3, 10, 0, 0 }, 780 [IEEE80211_MODE_TURBO_G]= { 7, 3, 10, 0, 0 }, 781 [IEEE80211_MODE_STURBO_A]={ 7, 3, 10, 0, 0 }, 782 [IEEE80211_MODE_HALF] = { 7, 4, 10, 0, 0 }, 783 [IEEE80211_MODE_QUARTER]= { 7, 4, 10, 0, 0 }, 784 [IEEE80211_MODE_11NA] = { 7, 4, 10, 0, 0 }, 785 [IEEE80211_MODE_11NG] = { 7, 4, 10, 0, 0 }, 786 }; 787 static const struct phyParamType phyParamForAC_VI[IEEE80211_MODE_MAX] = { 788 [IEEE80211_MODE_AUTO] = { 1, 3, 4, 94, 0 }, 789 [IEEE80211_MODE_11A] = { 1, 3, 4, 94, 0 }, 790 [IEEE80211_MODE_11B] = { 1, 3, 4, 188, 0 }, 791 [IEEE80211_MODE_11G] = { 1, 3, 4, 94, 0 }, 792 [IEEE80211_MODE_FH] = { 1, 3, 4, 188, 0 }, 793 [IEEE80211_MODE_TURBO_A]= { 1, 2, 3, 94, 0 }, 794 [IEEE80211_MODE_TURBO_G]= { 1, 2, 3, 94, 0 }, 795 [IEEE80211_MODE_STURBO_A]={ 1, 2, 3, 94, 0 }, 796 [IEEE80211_MODE_HALF] = { 1, 3, 4, 94, 0 }, 797 [IEEE80211_MODE_QUARTER]= { 1, 3, 4, 94, 0 }, 798 [IEEE80211_MODE_11NA] = { 1, 3, 4, 94, 0 }, 799 [IEEE80211_MODE_11NG] = { 1, 3, 4, 94, 0 }, 800 }; 801 static const struct phyParamType phyParamForAC_VO[IEEE80211_MODE_MAX] = { 802 [IEEE80211_MODE_AUTO] = { 1, 2, 3, 47, 0 }, 803 [IEEE80211_MODE_11A] = { 1, 2, 3, 47, 0 }, 804 [IEEE80211_MODE_11B] = { 1, 2, 3, 102, 0 }, 805 [IEEE80211_MODE_11G] = { 1, 2, 3, 47, 0 }, 806 [IEEE80211_MODE_FH] = { 1, 2, 3, 102, 0 }, 807 [IEEE80211_MODE_TURBO_A]= { 1, 2, 2, 47, 0 }, 808 [IEEE80211_MODE_TURBO_G]= { 1, 2, 2, 47, 0 }, 809 [IEEE80211_MODE_STURBO_A]={ 1, 2, 2, 47, 0 }, 810 [IEEE80211_MODE_HALF] = { 1, 2, 3, 47, 0 }, 811 [IEEE80211_MODE_QUARTER]= { 1, 2, 3, 47, 0 }, 812 [IEEE80211_MODE_11NA] = { 1, 2, 3, 47, 0 }, 813 [IEEE80211_MODE_11NG] = { 1, 2, 3, 47, 0 }, 814 }; 815 816 static const struct phyParamType bssPhyParamForAC_BE[IEEE80211_MODE_MAX] = { 817 [IEEE80211_MODE_AUTO] = { 3, 4, 10, 0, 0 }, 818 [IEEE80211_MODE_11A] = { 3, 4, 10, 0, 0 }, 819 [IEEE80211_MODE_11B] = { 3, 4, 10, 0, 0 }, 820 [IEEE80211_MODE_11G] = { 3, 4, 10, 0, 0 }, 821 [IEEE80211_MODE_FH] = { 3, 4, 10, 0, 0 }, 822 [IEEE80211_MODE_TURBO_A]= { 2, 3, 10, 0, 0 }, 823 [IEEE80211_MODE_TURBO_G]= { 2, 3, 10, 0, 0 }, 824 [IEEE80211_MODE_STURBO_A]={ 2, 3, 10, 0, 0 }, 825 [IEEE80211_MODE_HALF] = { 3, 4, 10, 0, 0 }, 826 [IEEE80211_MODE_QUARTER]= { 3, 4, 10, 0, 0 }, 827 [IEEE80211_MODE_11NA] = { 3, 4, 10, 0, 0 }, 828 [IEEE80211_MODE_11NG] = { 3, 4, 10, 0, 0 }, 829 }; 830 static const struct phyParamType bssPhyParamForAC_VI[IEEE80211_MODE_MAX] = { 831 [IEEE80211_MODE_AUTO] = { 2, 3, 4, 94, 0 }, 832 [IEEE80211_MODE_11A] = { 2, 3, 4, 94, 0 }, 833 [IEEE80211_MODE_11B] = { 2, 3, 4, 188, 0 }, 834 [IEEE80211_MODE_11G] = { 2, 3, 4, 94, 0 }, 835 [IEEE80211_MODE_FH] = { 2, 3, 4, 188, 0 }, 836 [IEEE80211_MODE_TURBO_A]= { 2, 2, 3, 94, 0 }, 837 [IEEE80211_MODE_TURBO_G]= { 2, 2, 3, 94, 0 }, 838 [IEEE80211_MODE_STURBO_A]={ 2, 2, 3, 94, 0 }, 839 [IEEE80211_MODE_HALF] = { 2, 3, 4, 94, 0 }, 840 [IEEE80211_MODE_QUARTER]= { 2, 3, 4, 94, 0 }, 841 [IEEE80211_MODE_11NA] = { 2, 3, 4, 94, 0 }, 842 [IEEE80211_MODE_11NG] = { 2, 3, 4, 94, 0 }, 843 }; 844 static const struct phyParamType bssPhyParamForAC_VO[IEEE80211_MODE_MAX] = { 845 [IEEE80211_MODE_AUTO] = { 2, 2, 3, 47, 0 }, 846 [IEEE80211_MODE_11A] = { 2, 2, 3, 47, 0 }, 847 [IEEE80211_MODE_11B] = { 2, 2, 3, 102, 0 }, 848 [IEEE80211_MODE_11G] = { 2, 2, 3, 47, 0 }, 849 [IEEE80211_MODE_FH] = { 2, 2, 3, 102, 0 }, 850 [IEEE80211_MODE_TURBO_A]= { 1, 2, 2, 47, 0 }, 851 [IEEE80211_MODE_TURBO_G]= { 1, 2, 2, 47, 0 }, 852 [IEEE80211_MODE_STURBO_A]={ 1, 2, 2, 47, 0 }, 853 [IEEE80211_MODE_HALF] = { 2, 2, 3, 47, 0 }, 854 [IEEE80211_MODE_QUARTER]= { 2, 2, 3, 47, 0 }, 855 [IEEE80211_MODE_11NA] = { 2, 2, 3, 47, 0 }, 856 [IEEE80211_MODE_11NG] = { 2, 2, 3, 47, 0 }, 857 }; 858 859 static void 860 _setifsparams(struct wmeParams *wmep, const paramType *phy) 861 { 862 wmep->wmep_aifsn = phy->aifsn; 863 wmep->wmep_logcwmin = phy->logcwmin; 864 wmep->wmep_logcwmax = phy->logcwmax; 865 wmep->wmep_txopLimit = phy->txopLimit; 866 } 867 868 static void 869 setwmeparams(struct ieee80211vap *vap, const char *type, int ac, 870 struct wmeParams *wmep, const paramType *phy) 871 { 872 wmep->wmep_acm = phy->acm; 873 _setifsparams(wmep, phy); 874 875 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 876 "set %s (%s) [acm %u aifsn %u logcwmin %u logcwmax %u txop %u]\n", 877 ieee80211_wme_acnames[ac], type, 878 wmep->wmep_acm, wmep->wmep_aifsn, wmep->wmep_logcwmin, 879 wmep->wmep_logcwmax, wmep->wmep_txopLimit); 880 } 881 882 static void 883 ieee80211_wme_initparams_locked(struct ieee80211vap *vap) 884 { 885 struct ieee80211com *ic = vap->iv_ic; 886 struct ieee80211_wme_state *wme = &ic->ic_wme; 887 const paramType *pPhyParam, *pBssPhyParam; 888 struct wmeParams *wmep; 889 enum ieee80211_phymode mode; 890 int i; 891 892 IEEE80211_LOCK_ASSERT(ic); 893 894 if ((ic->ic_caps & IEEE80211_C_WME) == 0 || ic->ic_nrunning > 1) 895 return; 896 897 /* 898 * Clear the wme cap_info field so a qoscount from a previous 899 * vap doesn't confuse later code which only parses the beacon 900 * field and updates hardware when said field changes. 901 * Otherwise the hardware is programmed with defaults, not what 902 * the beacon actually announces. 903 */ 904 wme->wme_wmeChanParams.cap_info = 0; 905 906 /* 907 * Select mode; we can be called early in which case we 908 * always use auto mode. We know we'll be called when 909 * entering the RUN state with bsschan setup properly 910 * so state will eventually get set correctly 911 */ 912 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC) 913 mode = ieee80211_chan2mode(ic->ic_bsschan); 914 else 915 mode = IEEE80211_MODE_AUTO; 916 for (i = 0; i < WME_NUM_AC; i++) { 917 switch (i) { 918 case WME_AC_BK: 919 pPhyParam = &phyParamForAC_BK[mode]; 920 pBssPhyParam = &phyParamForAC_BK[mode]; 921 break; 922 case WME_AC_VI: 923 pPhyParam = &phyParamForAC_VI[mode]; 924 pBssPhyParam = &bssPhyParamForAC_VI[mode]; 925 break; 926 case WME_AC_VO: 927 pPhyParam = &phyParamForAC_VO[mode]; 928 pBssPhyParam = &bssPhyParamForAC_VO[mode]; 929 break; 930 case WME_AC_BE: 931 default: 932 pPhyParam = &phyParamForAC_BE[mode]; 933 pBssPhyParam = &bssPhyParamForAC_BE[mode]; 934 break; 935 } 936 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i]; 937 if (ic->ic_opmode == IEEE80211_M_HOSTAP) { 938 setwmeparams(vap, "chan", i, wmep, pPhyParam); 939 } else { 940 setwmeparams(vap, "chan", i, wmep, pBssPhyParam); 941 } 942 wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i]; 943 setwmeparams(vap, "bss ", i, wmep, pBssPhyParam); 944 } 945 /* NB: check ic_bss to avoid NULL deref on initial attach */ 946 if (vap->iv_bss != NULL) { 947 /* 948 * Calculate agressive mode switching threshold based 949 * on beacon interval. This doesn't need locking since 950 * we're only called before entering the RUN state at 951 * which point we start sending beacon frames. 952 */ 953 wme->wme_hipri_switch_thresh = 954 (HIGH_PRI_SWITCH_THRESH * vap->iv_bss->ni_intval) / 100; 955 wme->wme_flags &= ~WME_F_AGGRMODE; 956 ieee80211_wme_updateparams(vap); 957 } 958 } 959 960 void 961 ieee80211_wme_initparams(struct ieee80211vap *vap) 962 { 963 struct ieee80211com *ic = vap->iv_ic; 964 965 IEEE80211_LOCK(ic); 966 ieee80211_wme_initparams_locked(vap); 967 IEEE80211_UNLOCK(ic); 968 } 969 970 /* 971 * Update WME parameters for ourself and the BSS. 972 */ 973 void 974 ieee80211_wme_updateparams_locked(struct ieee80211vap *vap) 975 { 976 static const paramType aggrParam[IEEE80211_MODE_MAX] = { 977 [IEEE80211_MODE_AUTO] = { 2, 4, 10, 64, 0 }, 978 [IEEE80211_MODE_11A] = { 2, 4, 10, 64, 0 }, 979 [IEEE80211_MODE_11B] = { 2, 5, 10, 64, 0 }, 980 [IEEE80211_MODE_11G] = { 2, 4, 10, 64, 0 }, 981 [IEEE80211_MODE_FH] = { 2, 5, 10, 64, 0 }, 982 [IEEE80211_MODE_TURBO_A] = { 1, 3, 10, 64, 0 }, 983 [IEEE80211_MODE_TURBO_G] = { 1, 3, 10, 64, 0 }, 984 [IEEE80211_MODE_STURBO_A] = { 1, 3, 10, 64, 0 }, 985 [IEEE80211_MODE_HALF] = { 2, 4, 10, 64, 0 }, 986 [IEEE80211_MODE_QUARTER] = { 2, 4, 10, 64, 0 }, 987 [IEEE80211_MODE_11NA] = { 2, 4, 10, 64, 0 }, /* XXXcheck*/ 988 [IEEE80211_MODE_11NG] = { 2, 4, 10, 64, 0 }, /* XXXcheck*/ 989 }; 990 struct ieee80211com *ic = vap->iv_ic; 991 struct ieee80211_wme_state *wme = &ic->ic_wme; 992 const struct wmeParams *wmep; 993 struct wmeParams *chanp, *bssp; 994 enum ieee80211_phymode mode; 995 int i; 996 int do_aggrmode = 0; 997 998 /* 999 * Set up the channel access parameters for the physical 1000 * device. First populate the configured settings. 1001 */ 1002 for (i = 0; i < WME_NUM_AC; i++) { 1003 chanp = &wme->wme_chanParams.cap_wmeParams[i]; 1004 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i]; 1005 chanp->wmep_aifsn = wmep->wmep_aifsn; 1006 chanp->wmep_logcwmin = wmep->wmep_logcwmin; 1007 chanp->wmep_logcwmax = wmep->wmep_logcwmax; 1008 chanp->wmep_txopLimit = wmep->wmep_txopLimit; 1009 1010 chanp = &wme->wme_bssChanParams.cap_wmeParams[i]; 1011 wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i]; 1012 chanp->wmep_aifsn = wmep->wmep_aifsn; 1013 chanp->wmep_logcwmin = wmep->wmep_logcwmin; 1014 chanp->wmep_logcwmax = wmep->wmep_logcwmax; 1015 chanp->wmep_txopLimit = wmep->wmep_txopLimit; 1016 } 1017 1018 /* 1019 * Select mode; we can be called early in which case we 1020 * always use auto mode. We know we'll be called when 1021 * entering the RUN state with bsschan setup properly 1022 * so state will eventually get set correctly 1023 */ 1024 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC) 1025 mode = ieee80211_chan2mode(ic->ic_bsschan); 1026 else 1027 mode = IEEE80211_MODE_AUTO; 1028 1029 /* 1030 * This implements agressive mode as found in certain 1031 * vendors' AP's. When there is significant high 1032 * priority (VI/VO) traffic in the BSS throttle back BE 1033 * traffic by using conservative parameters. Otherwise 1034 * BE uses agressive params to optimize performance of 1035 * legacy/non-QoS traffic. 1036 */ 1037 1038 /* Hostap? Only if aggressive mode is enabled */ 1039 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 1040 (wme->wme_flags & WME_F_AGGRMODE) != 0) 1041 do_aggrmode = 1; 1042 1043 /* 1044 * Station? Only if we're in a non-QoS BSS. 1045 */ 1046 else if ((vap->iv_opmode == IEEE80211_M_STA && 1047 (vap->iv_bss->ni_flags & IEEE80211_NODE_QOS) == 0)) 1048 do_aggrmode = 1; 1049 1050 /* 1051 * IBSS? Only if we we have WME enabled. 1052 */ 1053 else if ((vap->iv_opmode == IEEE80211_M_IBSS) && 1054 (vap->iv_flags & IEEE80211_F_WME)) 1055 do_aggrmode = 1; 1056 1057 /* 1058 * If WME is disabled on this VAP, default to aggressive mode 1059 * regardless of the configuration. 1060 */ 1061 if ((vap->iv_flags & IEEE80211_F_WME) == 0) 1062 do_aggrmode = 1; 1063 1064 /* XXX WDS? */ 1065 1066 /* XXX MBSS? */ 1067 1068 if (do_aggrmode) { 1069 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE]; 1070 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE]; 1071 1072 chanp->wmep_aifsn = bssp->wmep_aifsn = aggrParam[mode].aifsn; 1073 chanp->wmep_logcwmin = bssp->wmep_logcwmin = 1074 aggrParam[mode].logcwmin; 1075 chanp->wmep_logcwmax = bssp->wmep_logcwmax = 1076 aggrParam[mode].logcwmax; 1077 chanp->wmep_txopLimit = bssp->wmep_txopLimit = 1078 (vap->iv_flags & IEEE80211_F_BURST) ? 1079 aggrParam[mode].txopLimit : 0; 1080 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 1081 "update %s (chan+bss) [acm %u aifsn %u logcwmin %u " 1082 "logcwmax %u txop %u]\n", ieee80211_wme_acnames[WME_AC_BE], 1083 chanp->wmep_acm, chanp->wmep_aifsn, chanp->wmep_logcwmin, 1084 chanp->wmep_logcwmax, chanp->wmep_txopLimit); 1085 } 1086 1087 1088 /* 1089 * Change the contention window based on the number of associated 1090 * stations. If the number of associated stations is 1 and 1091 * aggressive mode is enabled, lower the contention window even 1092 * further. 1093 */ 1094 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 1095 ic->ic_sta_assoc < 2 && (wme->wme_flags & WME_F_AGGRMODE) != 0) { 1096 static const uint8_t logCwMin[IEEE80211_MODE_MAX] = { 1097 [IEEE80211_MODE_AUTO] = 3, 1098 [IEEE80211_MODE_11A] = 3, 1099 [IEEE80211_MODE_11B] = 4, 1100 [IEEE80211_MODE_11G] = 3, 1101 [IEEE80211_MODE_FH] = 4, 1102 [IEEE80211_MODE_TURBO_A] = 3, 1103 [IEEE80211_MODE_TURBO_G] = 3, 1104 [IEEE80211_MODE_STURBO_A] = 3, 1105 [IEEE80211_MODE_HALF] = 3, 1106 [IEEE80211_MODE_QUARTER] = 3, 1107 [IEEE80211_MODE_11NA] = 3, 1108 [IEEE80211_MODE_11NG] = 3, 1109 }; 1110 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE]; 1111 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE]; 1112 1113 chanp->wmep_logcwmin = bssp->wmep_logcwmin = logCwMin[mode]; 1114 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 1115 "update %s (chan+bss) logcwmin %u\n", 1116 ieee80211_wme_acnames[WME_AC_BE], chanp->wmep_logcwmin); 1117 } 1118 1119 /* 1120 * Arrange for the beacon update. 1121 * 1122 * XXX what about MBSS, WDS? 1123 */ 1124 if (vap->iv_opmode == IEEE80211_M_HOSTAP 1125 || vap->iv_opmode == IEEE80211_M_IBSS) { 1126 /* 1127 * Arrange for a beacon update and bump the parameter 1128 * set number so associated stations load the new values. 1129 */ 1130 wme->wme_bssChanParams.cap_info = 1131 (wme->wme_bssChanParams.cap_info+1) & WME_QOSINFO_COUNT; 1132 ieee80211_beacon_notify(vap, IEEE80211_BEACON_WME); 1133 } 1134 1135 wme->wme_update(ic); 1136 1137 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 1138 "%s: WME params updated, cap_info 0x%x\n", __func__, 1139 vap->iv_opmode == IEEE80211_M_STA ? 1140 wme->wme_wmeChanParams.cap_info : 1141 wme->wme_bssChanParams.cap_info); 1142 } 1143 1144 void 1145 ieee80211_wme_updateparams(struct ieee80211vap *vap) 1146 { 1147 struct ieee80211com *ic = vap->iv_ic; 1148 1149 if (ic->ic_caps & IEEE80211_C_WME) { 1150 IEEE80211_LOCK(ic); 1151 ieee80211_wme_updateparams_locked(vap); 1152 IEEE80211_UNLOCK(ic); 1153 } 1154 } 1155 1156 static void 1157 parent_updown(void *arg, int npending) 1158 { 1159 struct ifnet *parent = arg; 1160 1161 parent->if_ioctl(parent, SIOCSIFFLAGS, NULL); 1162 } 1163 1164 static void 1165 update_mcast(void *arg, int npending) 1166 { 1167 struct ieee80211com *ic = arg; 1168 struct ifnet *parent = ic->ic_ifp; 1169 1170 ic->ic_update_mcast(parent); 1171 } 1172 1173 static void 1174 update_promisc(void *arg, int npending) 1175 { 1176 struct ieee80211com *ic = arg; 1177 struct ifnet *parent = ic->ic_ifp; 1178 1179 ic->ic_update_promisc(parent); 1180 } 1181 1182 static void 1183 update_channel(void *arg, int npending) 1184 { 1185 struct ieee80211com *ic = arg; 1186 1187 ic->ic_set_channel(ic); 1188 ieee80211_radiotap_chan_change(ic); 1189 } 1190 1191 static void 1192 update_chw(void *arg, int npending) 1193 { 1194 struct ieee80211com *ic = arg; 1195 1196 /* 1197 * XXX should we defer the channel width _config_ update until now? 1198 */ 1199 ic->ic_update_chw(ic); 1200 } 1201 1202 /* 1203 * Block until the parent is in a known state. This is 1204 * used after any operations that dispatch a task (e.g. 1205 * to auto-configure the parent device up/down). 1206 */ 1207 void 1208 ieee80211_waitfor_parent(struct ieee80211com *ic) 1209 { 1210 taskqueue_block(ic->ic_tq); 1211 ieee80211_draintask(ic, &ic->ic_parent_task); 1212 ieee80211_draintask(ic, &ic->ic_mcast_task); 1213 ieee80211_draintask(ic, &ic->ic_promisc_task); 1214 ieee80211_draintask(ic, &ic->ic_chan_task); 1215 ieee80211_draintask(ic, &ic->ic_bmiss_task); 1216 ieee80211_draintask(ic, &ic->ic_chw_task); 1217 taskqueue_unblock(ic->ic_tq); 1218 } 1219 1220 /* 1221 * Start a vap running. If this is the first vap to be 1222 * set running on the underlying device then we 1223 * automatically bring the device up. 1224 */ 1225 void 1226 ieee80211_start_locked(struct ieee80211vap *vap) 1227 { 1228 struct ifnet *ifp = vap->iv_ifp; 1229 struct ieee80211com *ic = vap->iv_ic; 1230 struct ifnet *parent = ic->ic_ifp; 1231 1232 IEEE80211_LOCK_ASSERT(ic); 1233 1234 IEEE80211_DPRINTF(vap, 1235 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1236 "start running, %d vaps running\n", ic->ic_nrunning); 1237 1238 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) { 1239 /* 1240 * Mark us running. Note that it's ok to do this first; 1241 * if we need to bring the parent device up we defer that 1242 * to avoid dropping the com lock. We expect the device 1243 * to respond to being marked up by calling back into us 1244 * through ieee80211_start_all at which point we'll come 1245 * back in here and complete the work. 1246 */ 1247 ifp->if_drv_flags |= IFF_DRV_RUNNING; 1248 /* 1249 * We are not running; if this we are the first vap 1250 * to be brought up auto-up the parent if necessary. 1251 */ 1252 if (ic->ic_nrunning++ == 0 && 1253 (parent->if_drv_flags & IFF_DRV_RUNNING) == 0) { 1254 IEEE80211_DPRINTF(vap, 1255 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1256 "%s: up parent %s\n", __func__, parent->if_xname); 1257 parent->if_flags |= IFF_UP; 1258 ieee80211_runtask(ic, &ic->ic_parent_task); 1259 return; 1260 } 1261 } 1262 /* 1263 * If the parent is up and running, then kick the 1264 * 802.11 state machine as appropriate. 1265 */ 1266 if ((parent->if_drv_flags & IFF_DRV_RUNNING) && 1267 vap->iv_roaming != IEEE80211_ROAMING_MANUAL) { 1268 if (vap->iv_opmode == IEEE80211_M_STA) { 1269 #if 0 1270 /* XXX bypasses scan too easily; disable for now */ 1271 /* 1272 * Try to be intelligent about clocking the state 1273 * machine. If we're currently in RUN state then 1274 * we should be able to apply any new state/parameters 1275 * simply by re-associating. Otherwise we need to 1276 * re-scan to select an appropriate ap. 1277 */ 1278 if (vap->iv_state >= IEEE80211_S_RUN) 1279 ieee80211_new_state_locked(vap, 1280 IEEE80211_S_ASSOC, 1); 1281 else 1282 #endif 1283 ieee80211_new_state_locked(vap, 1284 IEEE80211_S_SCAN, 0); 1285 } else { 1286 /* 1287 * For monitor+wds mode there's nothing to do but 1288 * start running. Otherwise if this is the first 1289 * vap to be brought up, start a scan which may be 1290 * preempted if the station is locked to a particular 1291 * channel. 1292 */ 1293 vap->iv_flags_ext |= IEEE80211_FEXT_REINIT; 1294 if (vap->iv_opmode == IEEE80211_M_MONITOR || 1295 vap->iv_opmode == IEEE80211_M_WDS) 1296 ieee80211_new_state_locked(vap, 1297 IEEE80211_S_RUN, -1); 1298 else 1299 ieee80211_new_state_locked(vap, 1300 IEEE80211_S_SCAN, 0); 1301 } 1302 } 1303 } 1304 1305 /* 1306 * Start a single vap. 1307 */ 1308 void 1309 ieee80211_init(void *arg) 1310 { 1311 struct ieee80211vap *vap = arg; 1312 1313 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1314 "%s\n", __func__); 1315 1316 IEEE80211_LOCK(vap->iv_ic); 1317 ieee80211_start_locked(vap); 1318 IEEE80211_UNLOCK(vap->iv_ic); 1319 } 1320 1321 /* 1322 * Start all runnable vap's on a device. 1323 */ 1324 void 1325 ieee80211_start_all(struct ieee80211com *ic) 1326 { 1327 struct ieee80211vap *vap; 1328 1329 IEEE80211_LOCK(ic); 1330 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1331 struct ifnet *ifp = vap->iv_ifp; 1332 if (IFNET_IS_UP_RUNNING(ifp)) /* NB: avoid recursion */ 1333 ieee80211_start_locked(vap); 1334 } 1335 IEEE80211_UNLOCK(ic); 1336 } 1337 1338 /* 1339 * Stop a vap. We force it down using the state machine 1340 * then mark it's ifnet not running. If this is the last 1341 * vap running on the underlying device then we close it 1342 * too to insure it will be properly initialized when the 1343 * next vap is brought up. 1344 */ 1345 void 1346 ieee80211_stop_locked(struct ieee80211vap *vap) 1347 { 1348 struct ieee80211com *ic = vap->iv_ic; 1349 struct ifnet *ifp = vap->iv_ifp; 1350 struct ifnet *parent = ic->ic_ifp; 1351 1352 IEEE80211_LOCK_ASSERT(ic); 1353 1354 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1355 "stop running, %d vaps running\n", ic->ic_nrunning); 1356 1357 ieee80211_new_state_locked(vap, IEEE80211_S_INIT, -1); 1358 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 1359 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; /* mark us stopped */ 1360 if (--ic->ic_nrunning == 0 && 1361 (parent->if_drv_flags & IFF_DRV_RUNNING)) { 1362 IEEE80211_DPRINTF(vap, 1363 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1364 "down parent %s\n", parent->if_xname); 1365 parent->if_flags &= ~IFF_UP; 1366 ieee80211_runtask(ic, &ic->ic_parent_task); 1367 } 1368 } 1369 } 1370 1371 void 1372 ieee80211_stop(struct ieee80211vap *vap) 1373 { 1374 struct ieee80211com *ic = vap->iv_ic; 1375 1376 IEEE80211_LOCK(ic); 1377 ieee80211_stop_locked(vap); 1378 IEEE80211_UNLOCK(ic); 1379 } 1380 1381 /* 1382 * Stop all vap's running on a device. 1383 */ 1384 void 1385 ieee80211_stop_all(struct ieee80211com *ic) 1386 { 1387 struct ieee80211vap *vap; 1388 1389 IEEE80211_LOCK(ic); 1390 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1391 struct ifnet *ifp = vap->iv_ifp; 1392 if (IFNET_IS_UP_RUNNING(ifp)) /* NB: avoid recursion */ 1393 ieee80211_stop_locked(vap); 1394 } 1395 IEEE80211_UNLOCK(ic); 1396 1397 ieee80211_waitfor_parent(ic); 1398 } 1399 1400 /* 1401 * Stop all vap's running on a device and arrange 1402 * for those that were running to be resumed. 1403 */ 1404 void 1405 ieee80211_suspend_all(struct ieee80211com *ic) 1406 { 1407 struct ieee80211vap *vap; 1408 1409 IEEE80211_LOCK(ic); 1410 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1411 struct ifnet *ifp = vap->iv_ifp; 1412 if (IFNET_IS_UP_RUNNING(ifp)) { /* NB: avoid recursion */ 1413 vap->iv_flags_ext |= IEEE80211_FEXT_RESUME; 1414 ieee80211_stop_locked(vap); 1415 } 1416 } 1417 IEEE80211_UNLOCK(ic); 1418 1419 ieee80211_waitfor_parent(ic); 1420 } 1421 1422 /* 1423 * Start all vap's marked for resume. 1424 */ 1425 void 1426 ieee80211_resume_all(struct ieee80211com *ic) 1427 { 1428 struct ieee80211vap *vap; 1429 1430 IEEE80211_LOCK(ic); 1431 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1432 struct ifnet *ifp = vap->iv_ifp; 1433 if (!IFNET_IS_UP_RUNNING(ifp) && 1434 (vap->iv_flags_ext & IEEE80211_FEXT_RESUME)) { 1435 vap->iv_flags_ext &= ~IEEE80211_FEXT_RESUME; 1436 ieee80211_start_locked(vap); 1437 } 1438 } 1439 IEEE80211_UNLOCK(ic); 1440 } 1441 1442 void 1443 ieee80211_beacon_miss(struct ieee80211com *ic) 1444 { 1445 IEEE80211_LOCK(ic); 1446 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 1447 /* Process in a taskq, the handler may reenter the driver */ 1448 ieee80211_runtask(ic, &ic->ic_bmiss_task); 1449 } 1450 IEEE80211_UNLOCK(ic); 1451 } 1452 1453 static void 1454 beacon_miss(void *arg, int npending) 1455 { 1456 struct ieee80211com *ic = arg; 1457 struct ieee80211vap *vap; 1458 1459 IEEE80211_LOCK(ic); 1460 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1461 /* 1462 * We only pass events through for sta vap's in RUN state; 1463 * may be too restrictive but for now this saves all the 1464 * handlers duplicating these checks. 1465 */ 1466 if (vap->iv_opmode == IEEE80211_M_STA && 1467 vap->iv_state >= IEEE80211_S_RUN && 1468 vap->iv_bmiss != NULL) 1469 vap->iv_bmiss(vap); 1470 } 1471 IEEE80211_UNLOCK(ic); 1472 } 1473 1474 static void 1475 beacon_swmiss(void *arg, int npending) 1476 { 1477 struct ieee80211vap *vap = arg; 1478 struct ieee80211com *ic = vap->iv_ic; 1479 1480 IEEE80211_LOCK(ic); 1481 if (vap->iv_state == IEEE80211_S_RUN) { 1482 /* XXX Call multiple times if npending > zero? */ 1483 vap->iv_bmiss(vap); 1484 } 1485 IEEE80211_UNLOCK(ic); 1486 } 1487 1488 /* 1489 * Software beacon miss handling. Check if any beacons 1490 * were received in the last period. If not post a 1491 * beacon miss; otherwise reset the counter. 1492 */ 1493 void 1494 ieee80211_swbmiss(void *arg) 1495 { 1496 struct ieee80211vap *vap = arg; 1497 struct ieee80211com *ic = vap->iv_ic; 1498 1499 IEEE80211_LOCK_ASSERT(ic); 1500 1501 /* XXX sleep state? */ 1502 KASSERT(vap->iv_state == IEEE80211_S_RUN, 1503 ("wrong state %d", vap->iv_state)); 1504 1505 if (ic->ic_flags & IEEE80211_F_SCAN) { 1506 /* 1507 * If scanning just ignore and reset state. If we get a 1508 * bmiss after coming out of scan because we haven't had 1509 * time to receive a beacon then we should probe the AP 1510 * before posting a real bmiss (unless iv_bmiss_max has 1511 * been artifiically lowered). A cleaner solution might 1512 * be to disable the timer on scan start/end but to handle 1513 * case of multiple sta vap's we'd need to disable the 1514 * timers of all affected vap's. 1515 */ 1516 vap->iv_swbmiss_count = 0; 1517 } else if (vap->iv_swbmiss_count == 0) { 1518 if (vap->iv_bmiss != NULL) 1519 ieee80211_runtask(ic, &vap->iv_swbmiss_task); 1520 } else 1521 vap->iv_swbmiss_count = 0; 1522 callout_reset(&vap->iv_swbmiss, vap->iv_swbmiss_period, 1523 ieee80211_swbmiss, vap); 1524 } 1525 1526 /* 1527 * Start an 802.11h channel switch. We record the parameters, 1528 * mark the operation pending, notify each vap through the 1529 * beacon update mechanism so it can update the beacon frame 1530 * contents, and then switch vap's to CSA state to block outbound 1531 * traffic. Devices that handle CSA directly can use the state 1532 * switch to do the right thing so long as they call 1533 * ieee80211_csa_completeswitch when it's time to complete the 1534 * channel change. Devices that depend on the net80211 layer can 1535 * use ieee80211_beacon_update to handle the countdown and the 1536 * channel switch. 1537 */ 1538 void 1539 ieee80211_csa_startswitch(struct ieee80211com *ic, 1540 struct ieee80211_channel *c, int mode, int count) 1541 { 1542 struct ieee80211vap *vap; 1543 1544 IEEE80211_LOCK_ASSERT(ic); 1545 1546 ic->ic_csa_newchan = c; 1547 ic->ic_csa_mode = mode; 1548 ic->ic_csa_count = count; 1549 ic->ic_flags |= IEEE80211_F_CSAPENDING; 1550 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1551 if (vap->iv_opmode == IEEE80211_M_HOSTAP || 1552 vap->iv_opmode == IEEE80211_M_IBSS || 1553 vap->iv_opmode == IEEE80211_M_MBSS) 1554 ieee80211_beacon_notify(vap, IEEE80211_BEACON_CSA); 1555 /* switch to CSA state to block outbound traffic */ 1556 if (vap->iv_state == IEEE80211_S_RUN) 1557 ieee80211_new_state_locked(vap, IEEE80211_S_CSA, 0); 1558 } 1559 ieee80211_notify_csa(ic, c, mode, count); 1560 } 1561 1562 /* 1563 * Complete the channel switch by transitioning all CSA VAPs to RUN. 1564 * This is called by both the completion and cancellation functions 1565 * so each VAP is placed back in the RUN state and can thus transmit. 1566 */ 1567 static void 1568 csa_completeswitch(struct ieee80211com *ic) 1569 { 1570 struct ieee80211vap *vap; 1571 1572 ic->ic_csa_newchan = NULL; 1573 ic->ic_flags &= ~IEEE80211_F_CSAPENDING; 1574 1575 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1576 if (vap->iv_state == IEEE80211_S_CSA) 1577 ieee80211_new_state_locked(vap, IEEE80211_S_RUN, 0); 1578 } 1579 1580 /* 1581 * Complete an 802.11h channel switch started by ieee80211_csa_startswitch. 1582 * We clear state and move all vap's in CSA state to RUN state 1583 * so they can again transmit. 1584 * 1585 * Although this may not be completely correct, update the BSS channel 1586 * for each VAP to the newly configured channel. The setcurchan sets 1587 * the current operating channel for the interface (so the radio does 1588 * switch over) but the VAP BSS isn't updated, leading to incorrectly 1589 * reported information via ioctl. 1590 */ 1591 void 1592 ieee80211_csa_completeswitch(struct ieee80211com *ic) 1593 { 1594 struct ieee80211vap *vap; 1595 1596 IEEE80211_LOCK_ASSERT(ic); 1597 1598 KASSERT(ic->ic_flags & IEEE80211_F_CSAPENDING, ("csa not pending")); 1599 1600 ieee80211_setcurchan(ic, ic->ic_csa_newchan); 1601 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1602 if (vap->iv_state == IEEE80211_S_CSA) 1603 vap->iv_bss->ni_chan = ic->ic_curchan; 1604 1605 csa_completeswitch(ic); 1606 } 1607 1608 /* 1609 * Cancel an 802.11h channel switch started by ieee80211_csa_startswitch. 1610 * We clear state and move all vap's in CSA state to RUN state 1611 * so they can again transmit. 1612 */ 1613 void 1614 ieee80211_csa_cancelswitch(struct ieee80211com *ic) 1615 { 1616 IEEE80211_LOCK_ASSERT(ic); 1617 1618 csa_completeswitch(ic); 1619 } 1620 1621 /* 1622 * Complete a DFS CAC started by ieee80211_dfs_cac_start. 1623 * We clear state and move all vap's in CAC state to RUN state. 1624 */ 1625 void 1626 ieee80211_cac_completeswitch(struct ieee80211vap *vap0) 1627 { 1628 struct ieee80211com *ic = vap0->iv_ic; 1629 struct ieee80211vap *vap; 1630 1631 IEEE80211_LOCK(ic); 1632 /* 1633 * Complete CAC state change for lead vap first; then 1634 * clock all the other vap's waiting. 1635 */ 1636 KASSERT(vap0->iv_state == IEEE80211_S_CAC, 1637 ("wrong state %d", vap0->iv_state)); 1638 ieee80211_new_state_locked(vap0, IEEE80211_S_RUN, 0); 1639 1640 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1641 if (vap->iv_state == IEEE80211_S_CAC) 1642 ieee80211_new_state_locked(vap, IEEE80211_S_RUN, 0); 1643 IEEE80211_UNLOCK(ic); 1644 } 1645 1646 /* 1647 * Force all vap's other than the specified vap to the INIT state 1648 * and mark them as waiting for a scan to complete. These vaps 1649 * will be brought up when the scan completes and the scanning vap 1650 * reaches RUN state by wakeupwaiting. 1651 */ 1652 static void 1653 markwaiting(struct ieee80211vap *vap0) 1654 { 1655 struct ieee80211com *ic = vap0->iv_ic; 1656 struct ieee80211vap *vap; 1657 1658 IEEE80211_LOCK_ASSERT(ic); 1659 1660 /* 1661 * A vap list entry can not disappear since we are running on the 1662 * taskqueue and a vap destroy will queue and drain another state 1663 * change task. 1664 */ 1665 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1666 if (vap == vap0) 1667 continue; 1668 if (vap->iv_state != IEEE80211_S_INIT) { 1669 /* NB: iv_newstate may drop the lock */ 1670 vap->iv_newstate(vap, IEEE80211_S_INIT, 0); 1671 IEEE80211_LOCK_ASSERT(ic); 1672 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT; 1673 } 1674 } 1675 } 1676 1677 /* 1678 * Wakeup all vap's waiting for a scan to complete. This is the 1679 * companion to markwaiting (above) and is used to coordinate 1680 * multiple vaps scanning. 1681 * This is called from the state taskqueue. 1682 */ 1683 static void 1684 wakeupwaiting(struct ieee80211vap *vap0) 1685 { 1686 struct ieee80211com *ic = vap0->iv_ic; 1687 struct ieee80211vap *vap; 1688 1689 IEEE80211_LOCK_ASSERT(ic); 1690 1691 /* 1692 * A vap list entry can not disappear since we are running on the 1693 * taskqueue and a vap destroy will queue and drain another state 1694 * change task. 1695 */ 1696 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1697 if (vap == vap0) 1698 continue; 1699 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANWAIT) { 1700 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANWAIT; 1701 /* NB: sta's cannot go INIT->RUN */ 1702 /* NB: iv_newstate may drop the lock */ 1703 vap->iv_newstate(vap, 1704 vap->iv_opmode == IEEE80211_M_STA ? 1705 IEEE80211_S_SCAN : IEEE80211_S_RUN, 0); 1706 IEEE80211_LOCK_ASSERT(ic); 1707 } 1708 } 1709 } 1710 1711 /* 1712 * Handle post state change work common to all operating modes. 1713 */ 1714 static void 1715 ieee80211_newstate_cb(void *xvap, int npending) 1716 { 1717 struct ieee80211vap *vap = xvap; 1718 struct ieee80211com *ic = vap->iv_ic; 1719 enum ieee80211_state nstate, ostate; 1720 int arg, rc; 1721 1722 IEEE80211_LOCK(ic); 1723 nstate = vap->iv_nstate; 1724 arg = vap->iv_nstate_arg; 1725 1726 if (vap->iv_flags_ext & IEEE80211_FEXT_REINIT) { 1727 /* 1728 * We have been requested to drop back to the INIT before 1729 * proceeding to the new state. 1730 */ 1731 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1732 "%s: %s -> %s arg %d\n", __func__, 1733 ieee80211_state_name[vap->iv_state], 1734 ieee80211_state_name[IEEE80211_S_INIT], arg); 1735 vap->iv_newstate(vap, IEEE80211_S_INIT, arg); 1736 IEEE80211_LOCK_ASSERT(ic); 1737 vap->iv_flags_ext &= ~IEEE80211_FEXT_REINIT; 1738 } 1739 1740 ostate = vap->iv_state; 1741 if (nstate == IEEE80211_S_SCAN && ostate != IEEE80211_S_INIT) { 1742 /* 1743 * SCAN was forced; e.g. on beacon miss. Force other running 1744 * vap's to INIT state and mark them as waiting for the scan to 1745 * complete. This insures they don't interfere with our 1746 * scanning. Since we are single threaded the vaps can not 1747 * transition again while we are executing. 1748 * 1749 * XXX not always right, assumes ap follows sta 1750 */ 1751 markwaiting(vap); 1752 } 1753 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1754 "%s: %s -> %s arg %d\n", __func__, 1755 ieee80211_state_name[ostate], ieee80211_state_name[nstate], arg); 1756 1757 rc = vap->iv_newstate(vap, nstate, arg); 1758 IEEE80211_LOCK_ASSERT(ic); 1759 vap->iv_flags_ext &= ~IEEE80211_FEXT_STATEWAIT; 1760 if (rc != 0) { 1761 /* State transition failed */ 1762 KASSERT(rc != EINPROGRESS, ("iv_newstate was deferred")); 1763 KASSERT(nstate != IEEE80211_S_INIT, 1764 ("INIT state change failed")); 1765 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1766 "%s: %s returned error %d\n", __func__, 1767 ieee80211_state_name[nstate], rc); 1768 goto done; 1769 } 1770 1771 /* No actual transition, skip post processing */ 1772 if (ostate == nstate) 1773 goto done; 1774 1775 if (nstate == IEEE80211_S_RUN) { 1776 /* 1777 * OACTIVE may be set on the vap if the upper layer 1778 * tried to transmit (e.g. IPv6 NDP) before we reach 1779 * RUN state. Clear it and restart xmit. 1780 * 1781 * Note this can also happen as a result of SLEEP->RUN 1782 * (i.e. coming out of power save mode). 1783 */ 1784 vap->iv_ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 1785 1786 /* 1787 * XXX TODO Kick-start a VAP queue - this should be a method! 1788 */ 1789 1790 /* bring up any vaps waiting on us */ 1791 wakeupwaiting(vap); 1792 } else if (nstate == IEEE80211_S_INIT) { 1793 /* 1794 * Flush the scan cache if we did the last scan (XXX?) 1795 * and flush any frames on send queues from this vap. 1796 * Note the mgt q is used only for legacy drivers and 1797 * will go away shortly. 1798 */ 1799 ieee80211_scan_flush(vap); 1800 1801 /* 1802 * XXX TODO: ic/vap queue flush 1803 */ 1804 } 1805 done: 1806 IEEE80211_UNLOCK(ic); 1807 } 1808 1809 /* 1810 * Public interface for initiating a state machine change. 1811 * This routine single-threads the request and coordinates 1812 * the scheduling of multiple vaps for the purpose of selecting 1813 * an operating channel. Specifically the following scenarios 1814 * are handled: 1815 * o only one vap can be selecting a channel so on transition to 1816 * SCAN state if another vap is already scanning then 1817 * mark the caller for later processing and return without 1818 * doing anything (XXX? expectations by caller of synchronous operation) 1819 * o only one vap can be doing CAC of a channel so on transition to 1820 * CAC state if another vap is already scanning for radar then 1821 * mark the caller for later processing and return without 1822 * doing anything (XXX? expectations by caller of synchronous operation) 1823 * o if another vap is already running when a request is made 1824 * to SCAN then an operating channel has been chosen; bypass 1825 * the scan and just join the channel 1826 * 1827 * Note that the state change call is done through the iv_newstate 1828 * method pointer so any driver routine gets invoked. The driver 1829 * will normally call back into operating mode-specific 1830 * ieee80211_newstate routines (below) unless it needs to completely 1831 * bypass the state machine (e.g. because the firmware has it's 1832 * own idea how things should work). Bypassing the net80211 layer 1833 * is usually a mistake and indicates lack of proper integration 1834 * with the net80211 layer. 1835 */ 1836 int 1837 ieee80211_new_state_locked(struct ieee80211vap *vap, 1838 enum ieee80211_state nstate, int arg) 1839 { 1840 struct ieee80211com *ic = vap->iv_ic; 1841 struct ieee80211vap *vp; 1842 enum ieee80211_state ostate; 1843 int nrunning, nscanning; 1844 1845 IEEE80211_LOCK_ASSERT(ic); 1846 1847 if (vap->iv_flags_ext & IEEE80211_FEXT_STATEWAIT) { 1848 if (vap->iv_nstate == IEEE80211_S_INIT) { 1849 /* 1850 * XXX The vap is being stopped, do no allow any other 1851 * state changes until this is completed. 1852 */ 1853 return -1; 1854 } else if (vap->iv_state != vap->iv_nstate) { 1855 #if 0 1856 /* Warn if the previous state hasn't completed. */ 1857 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1858 "%s: pending %s -> %s transition lost\n", __func__, 1859 ieee80211_state_name[vap->iv_state], 1860 ieee80211_state_name[vap->iv_nstate]); 1861 #else 1862 /* XXX temporarily enable to identify issues */ 1863 if_printf(vap->iv_ifp, 1864 "%s: pending %s -> %s transition lost\n", 1865 __func__, ieee80211_state_name[vap->iv_state], 1866 ieee80211_state_name[vap->iv_nstate]); 1867 #endif 1868 } 1869 } 1870 1871 nrunning = nscanning = 0; 1872 /* XXX can track this state instead of calculating */ 1873 TAILQ_FOREACH(vp, &ic->ic_vaps, iv_next) { 1874 if (vp != vap) { 1875 if (vp->iv_state >= IEEE80211_S_RUN) 1876 nrunning++; 1877 /* XXX doesn't handle bg scan */ 1878 /* NB: CAC+AUTH+ASSOC treated like SCAN */ 1879 else if (vp->iv_state > IEEE80211_S_INIT) 1880 nscanning++; 1881 } 1882 } 1883 ostate = vap->iv_state; 1884 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1885 "%s: %s -> %s (nrunning %d nscanning %d)\n", __func__, 1886 ieee80211_state_name[ostate], ieee80211_state_name[nstate], 1887 nrunning, nscanning); 1888 switch (nstate) { 1889 case IEEE80211_S_SCAN: 1890 if (ostate == IEEE80211_S_INIT) { 1891 /* 1892 * INIT -> SCAN happens on initial bringup. 1893 */ 1894 KASSERT(!(nscanning && nrunning), 1895 ("%d scanning and %d running", nscanning, nrunning)); 1896 if (nscanning) { 1897 /* 1898 * Someone is scanning, defer our state 1899 * change until the work has completed. 1900 */ 1901 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1902 "%s: defer %s -> %s\n", 1903 __func__, ieee80211_state_name[ostate], 1904 ieee80211_state_name[nstate]); 1905 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT; 1906 return 0; 1907 } 1908 if (nrunning) { 1909 /* 1910 * Someone is operating; just join the channel 1911 * they have chosen. 1912 */ 1913 /* XXX kill arg? */ 1914 /* XXX check each opmode, adhoc? */ 1915 if (vap->iv_opmode == IEEE80211_M_STA) 1916 nstate = IEEE80211_S_SCAN; 1917 else 1918 nstate = IEEE80211_S_RUN; 1919 #ifdef IEEE80211_DEBUG 1920 if (nstate != IEEE80211_S_SCAN) { 1921 IEEE80211_DPRINTF(vap, 1922 IEEE80211_MSG_STATE, 1923 "%s: override, now %s -> %s\n", 1924 __func__, 1925 ieee80211_state_name[ostate], 1926 ieee80211_state_name[nstate]); 1927 } 1928 #endif 1929 } 1930 } 1931 break; 1932 case IEEE80211_S_RUN: 1933 if (vap->iv_opmode == IEEE80211_M_WDS && 1934 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) && 1935 nscanning) { 1936 /* 1937 * Legacy WDS with someone else scanning; don't 1938 * go online until that completes as we should 1939 * follow the other vap to the channel they choose. 1940 */ 1941 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1942 "%s: defer %s -> %s (legacy WDS)\n", __func__, 1943 ieee80211_state_name[ostate], 1944 ieee80211_state_name[nstate]); 1945 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT; 1946 return 0; 1947 } 1948 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 1949 IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) && 1950 (vap->iv_flags_ext & IEEE80211_FEXT_DFS) && 1951 !IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) { 1952 /* 1953 * This is a DFS channel, transition to CAC state 1954 * instead of RUN. This allows us to initiate 1955 * Channel Availability Check (CAC) as specified 1956 * by 11h/DFS. 1957 */ 1958 nstate = IEEE80211_S_CAC; 1959 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1960 "%s: override %s -> %s (DFS)\n", __func__, 1961 ieee80211_state_name[ostate], 1962 ieee80211_state_name[nstate]); 1963 } 1964 break; 1965 case IEEE80211_S_INIT: 1966 /* cancel any scan in progress */ 1967 ieee80211_cancel_scan(vap); 1968 if (ostate == IEEE80211_S_INIT ) { 1969 /* XXX don't believe this */ 1970 /* INIT -> INIT. nothing to do */ 1971 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANWAIT; 1972 } 1973 /* fall thru... */ 1974 default: 1975 break; 1976 } 1977 /* defer the state change to a thread */ 1978 vap->iv_nstate = nstate; 1979 vap->iv_nstate_arg = arg; 1980 vap->iv_flags_ext |= IEEE80211_FEXT_STATEWAIT; 1981 ieee80211_runtask(ic, &vap->iv_nstate_task); 1982 return EINPROGRESS; 1983 } 1984 1985 int 1986 ieee80211_new_state(struct ieee80211vap *vap, 1987 enum ieee80211_state nstate, int arg) 1988 { 1989 struct ieee80211com *ic = vap->iv_ic; 1990 int rc; 1991 1992 IEEE80211_LOCK(ic); 1993 rc = ieee80211_new_state_locked(vap, nstate, arg); 1994 IEEE80211_UNLOCK(ic); 1995 return rc; 1996 } 1997