1 /*- 2 * Copyright (c) 2001 Atsushi Onoe 3 * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting 4 * Copyright (c) 2012 IEEE 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 31 /* 32 * IEEE 802.11 protocol support. 33 */ 34 35 #include "opt_inet.h" 36 #include "opt_wlan.h" 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/kernel.h> 41 #include <sys/malloc.h> 42 43 #include <sys/socket.h> 44 #include <sys/sockio.h> 45 46 #include <net/if.h> 47 #include <net/if_var.h> 48 #include <net/if_media.h> 49 #include <net/ethernet.h> /* XXX for ether_sprintf */ 50 51 #include <net80211/ieee80211_var.h> 52 #include <net80211/ieee80211_adhoc.h> 53 #include <net80211/ieee80211_sta.h> 54 #include <net80211/ieee80211_hostap.h> 55 #include <net80211/ieee80211_wds.h> 56 #ifdef IEEE80211_SUPPORT_MESH 57 #include <net80211/ieee80211_mesh.h> 58 #endif 59 #include <net80211/ieee80211_monitor.h> 60 #include <net80211/ieee80211_input.h> 61 62 /* XXX tunables */ 63 #define AGGRESSIVE_MODE_SWITCH_HYSTERESIS 3 /* pkts / 100ms */ 64 #define HIGH_PRI_SWITCH_THRESH 10 /* pkts / 100ms */ 65 66 const char *mgt_subtype_name[] = { 67 "assoc_req", "assoc_resp", "reassoc_req", "reassoc_resp", 68 "probe_req", "probe_resp", "timing_adv", "reserved#7", 69 "beacon", "atim", "disassoc", "auth", 70 "deauth", "action", "action_noack", "reserved#15" 71 }; 72 const char *ctl_subtype_name[] = { 73 "reserved#0", "reserved#1", "reserved#2", "reserved#3", 74 "reserved#4", "reserved#5", "reserved#6", "control_wrap", 75 "bar", "ba", "ps_poll", "rts", 76 "cts", "ack", "cf_end", "cf_end_ack" 77 }; 78 const char *ieee80211_opmode_name[IEEE80211_OPMODE_MAX] = { 79 "IBSS", /* IEEE80211_M_IBSS */ 80 "STA", /* IEEE80211_M_STA */ 81 "WDS", /* IEEE80211_M_WDS */ 82 "AHDEMO", /* IEEE80211_M_AHDEMO */ 83 "HOSTAP", /* IEEE80211_M_HOSTAP */ 84 "MONITOR", /* IEEE80211_M_MONITOR */ 85 "MBSS" /* IEEE80211_M_MBSS */ 86 }; 87 const char *ieee80211_state_name[IEEE80211_S_MAX] = { 88 "INIT", /* IEEE80211_S_INIT */ 89 "SCAN", /* IEEE80211_S_SCAN */ 90 "AUTH", /* IEEE80211_S_AUTH */ 91 "ASSOC", /* IEEE80211_S_ASSOC */ 92 "CAC", /* IEEE80211_S_CAC */ 93 "RUN", /* IEEE80211_S_RUN */ 94 "CSA", /* IEEE80211_S_CSA */ 95 "SLEEP", /* IEEE80211_S_SLEEP */ 96 }; 97 const char *ieee80211_wme_acnames[] = { 98 "WME_AC_BE", 99 "WME_AC_BK", 100 "WME_AC_VI", 101 "WME_AC_VO", 102 "WME_UPSD", 103 }; 104 105 106 /* 107 * Reason code descriptions were (mostly) obtained from 108 * IEEE Std 802.11-2012, pp. 442-445 Table 8-36. 109 */ 110 const char * 111 ieee80211_reason_to_string(uint16_t reason) 112 { 113 switch (reason) { 114 case IEEE80211_REASON_UNSPECIFIED: 115 return ("unspecified"); 116 case IEEE80211_REASON_AUTH_EXPIRE: 117 return ("previous authentication is expired"); 118 case IEEE80211_REASON_AUTH_LEAVE: 119 return ("sending STA is leaving/has left IBSS or ESS"); 120 case IEEE80211_REASON_ASSOC_EXPIRE: 121 return ("disassociated due to inactivity"); 122 case IEEE80211_REASON_ASSOC_TOOMANY: 123 return ("too many associated STAs"); 124 case IEEE80211_REASON_NOT_AUTHED: 125 return ("class 2 frame received from nonauthenticated STA"); 126 case IEEE80211_REASON_NOT_ASSOCED: 127 return ("class 3 frame received from nonassociated STA"); 128 case IEEE80211_REASON_ASSOC_LEAVE: 129 return ("sending STA is leaving/has left BSS"); 130 case IEEE80211_REASON_ASSOC_NOT_AUTHED: 131 return ("STA requesting (re)association is not authenticated"); 132 case IEEE80211_REASON_DISASSOC_PWRCAP_BAD: 133 return ("information in the Power Capability element is " 134 "unacceptable"); 135 case IEEE80211_REASON_DISASSOC_SUPCHAN_BAD: 136 return ("information in the Supported Channels element is " 137 "unacceptable"); 138 case IEEE80211_REASON_IE_INVALID: 139 return ("invalid element"); 140 case IEEE80211_REASON_MIC_FAILURE: 141 return ("MIC failure"); 142 case IEEE80211_REASON_4WAY_HANDSHAKE_TIMEOUT: 143 return ("4-Way handshake timeout"); 144 case IEEE80211_REASON_GROUP_KEY_UPDATE_TIMEOUT: 145 return ("group key update timeout"); 146 case IEEE80211_REASON_IE_IN_4WAY_DIFFERS: 147 return ("element in 4-Way handshake different from " 148 "(re)association request/probe response/beacon frame"); 149 case IEEE80211_REASON_GROUP_CIPHER_INVALID: 150 return ("invalid group cipher"); 151 case IEEE80211_REASON_PAIRWISE_CIPHER_INVALID: 152 return ("invalid pairwise cipher"); 153 case IEEE80211_REASON_AKMP_INVALID: 154 return ("invalid AKMP"); 155 case IEEE80211_REASON_UNSUPP_RSN_IE_VERSION: 156 return ("unsupported version in RSN IE"); 157 case IEEE80211_REASON_INVALID_RSN_IE_CAP: 158 return ("invalid capabilities in RSN IE"); 159 case IEEE80211_REASON_802_1X_AUTH_FAILED: 160 return ("IEEE 802.1X authentication failed"); 161 case IEEE80211_REASON_CIPHER_SUITE_REJECTED: 162 return ("cipher suite rejected because of the security " 163 "policy"); 164 case IEEE80211_REASON_UNSPECIFIED_QOS: 165 return ("unspecified (QoS-related)"); 166 case IEEE80211_REASON_INSUFFICIENT_BW: 167 return ("QoS AP lacks sufficient bandwidth for this QoS STA"); 168 case IEEE80211_REASON_TOOMANY_FRAMES: 169 return ("too many frames need to be acknowledged"); 170 case IEEE80211_REASON_OUTSIDE_TXOP: 171 return ("STA is transmitting outside the limits of its TXOPs"); 172 case IEEE80211_REASON_LEAVING_QBSS: 173 return ("requested from peer STA (the STA is " 174 "resetting/leaving the BSS)"); 175 case IEEE80211_REASON_BAD_MECHANISM: 176 return ("requested from peer STA (it does not want to use " 177 "the mechanism)"); 178 case IEEE80211_REASON_SETUP_NEEDED: 179 return ("requested from peer STA (setup is required for the " 180 "used mechanism)"); 181 case IEEE80211_REASON_TIMEOUT: 182 return ("requested from peer STA (timeout)"); 183 case IEEE80211_REASON_PEER_LINK_CANCELED: 184 return ("SME cancels the mesh peering instance (not related " 185 "to the maximum number of peer mesh STAs)"); 186 case IEEE80211_REASON_MESH_MAX_PEERS: 187 return ("maximum number of peer mesh STAs was reached"); 188 case IEEE80211_REASON_MESH_CPVIOLATION: 189 return ("the received information violates the Mesh " 190 "Configuration policy configured in the mesh STA " 191 "profile"); 192 case IEEE80211_REASON_MESH_CLOSE_RCVD: 193 return ("the mesh STA has received a Mesh Peering Close " 194 "message requesting to close the mesh peering"); 195 case IEEE80211_REASON_MESH_MAX_RETRIES: 196 return ("the mesh STA has resent dot11MeshMaxRetries Mesh " 197 "Peering Open messages, without receiving a Mesh " 198 "Peering Confirm message"); 199 case IEEE80211_REASON_MESH_CONFIRM_TIMEOUT: 200 return ("the confirmTimer for the mesh peering instance times " 201 "out"); 202 case IEEE80211_REASON_MESH_INVALID_GTK: 203 return ("the mesh STA fails to unwrap the GTK or the values " 204 "in the wrapped contents do not match"); 205 case IEEE80211_REASON_MESH_INCONS_PARAMS: 206 return ("the mesh STA receives inconsistent information about " 207 "the mesh parameters between Mesh Peering Management " 208 "frames"); 209 case IEEE80211_REASON_MESH_INVALID_SECURITY: 210 return ("the mesh STA fails the authenticated mesh peering " 211 "exchange because due to failure in selecting " 212 "pairwise/group ciphersuite"); 213 case IEEE80211_REASON_MESH_PERR_NO_PROXY: 214 return ("the mesh STA does not have proxy information for " 215 "this external destination"); 216 case IEEE80211_REASON_MESH_PERR_NO_FI: 217 return ("the mesh STA does not have forwarding information " 218 "for this destination"); 219 case IEEE80211_REASON_MESH_PERR_DEST_UNREACH: 220 return ("the mesh STA determines that the link to the next " 221 "hop of an active path in its forwarding information " 222 "is no longer usable"); 223 case IEEE80211_REASON_MESH_MAC_ALRDY_EXISTS_MBSS: 224 return ("the MAC address of the STA already exists in the " 225 "mesh BSS"); 226 case IEEE80211_REASON_MESH_CHAN_SWITCH_REG: 227 return ("the mesh STA performs channel switch to meet " 228 "regulatory requirements"); 229 case IEEE80211_REASON_MESH_CHAN_SWITCH_UNSPEC: 230 return ("the mesh STA performs channel switch with " 231 "unspecified reason"); 232 default: 233 return ("reserved/unknown"); 234 } 235 } 236 237 static void beacon_miss(void *, int); 238 static void beacon_swmiss(void *, int); 239 static void parent_updown(void *, int); 240 static void update_mcast(void *, int); 241 static void update_promisc(void *, int); 242 static void update_channel(void *, int); 243 static void update_chw(void *, int); 244 static void update_wme(void *, int); 245 static void restart_vaps(void *, int); 246 static void ieee80211_newstate_cb(void *, int); 247 248 static int 249 null_raw_xmit(struct ieee80211_node *ni, struct mbuf *m, 250 const struct ieee80211_bpf_params *params) 251 { 252 253 ic_printf(ni->ni_ic, "missing ic_raw_xmit callback, drop frame\n"); 254 m_freem(m); 255 return ENETDOWN; 256 } 257 258 void 259 ieee80211_proto_attach(struct ieee80211com *ic) 260 { 261 uint8_t hdrlen; 262 263 /* override the 802.3 setting */ 264 hdrlen = ic->ic_headroom 265 + sizeof(struct ieee80211_qosframe_addr4) 266 + IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN 267 + IEEE80211_WEP_EXTIVLEN; 268 /* XXX no way to recalculate on ifdetach */ 269 if (ALIGN(hdrlen) > max_linkhdr) { 270 /* XXX sanity check... */ 271 max_linkhdr = ALIGN(hdrlen); 272 max_hdr = max_linkhdr + max_protohdr; 273 max_datalen = MHLEN - max_hdr; 274 } 275 ic->ic_protmode = IEEE80211_PROT_CTSONLY; 276 277 TASK_INIT(&ic->ic_parent_task, 0, parent_updown, ic); 278 TASK_INIT(&ic->ic_mcast_task, 0, update_mcast, ic); 279 TASK_INIT(&ic->ic_promisc_task, 0, update_promisc, ic); 280 TASK_INIT(&ic->ic_chan_task, 0, update_channel, ic); 281 TASK_INIT(&ic->ic_bmiss_task, 0, beacon_miss, ic); 282 TASK_INIT(&ic->ic_chw_task, 0, update_chw, ic); 283 TASK_INIT(&ic->ic_wme_task, 0, update_wme, ic); 284 TASK_INIT(&ic->ic_restart_task, 0, restart_vaps, ic); 285 286 ic->ic_wme.wme_hipri_switch_hysteresis = 287 AGGRESSIVE_MODE_SWITCH_HYSTERESIS; 288 289 /* initialize management frame handlers */ 290 ic->ic_send_mgmt = ieee80211_send_mgmt; 291 ic->ic_raw_xmit = null_raw_xmit; 292 293 ieee80211_adhoc_attach(ic); 294 ieee80211_sta_attach(ic); 295 ieee80211_wds_attach(ic); 296 ieee80211_hostap_attach(ic); 297 #ifdef IEEE80211_SUPPORT_MESH 298 ieee80211_mesh_attach(ic); 299 #endif 300 ieee80211_monitor_attach(ic); 301 } 302 303 void 304 ieee80211_proto_detach(struct ieee80211com *ic) 305 { 306 ieee80211_monitor_detach(ic); 307 #ifdef IEEE80211_SUPPORT_MESH 308 ieee80211_mesh_detach(ic); 309 #endif 310 ieee80211_hostap_detach(ic); 311 ieee80211_wds_detach(ic); 312 ieee80211_adhoc_detach(ic); 313 ieee80211_sta_detach(ic); 314 } 315 316 static void 317 null_update_beacon(struct ieee80211vap *vap, int item) 318 { 319 } 320 321 void 322 ieee80211_proto_vattach(struct ieee80211vap *vap) 323 { 324 struct ieee80211com *ic = vap->iv_ic; 325 struct ifnet *ifp = vap->iv_ifp; 326 int i; 327 328 /* override the 802.3 setting */ 329 ifp->if_hdrlen = ic->ic_headroom 330 + sizeof(struct ieee80211_qosframe_addr4) 331 + IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN 332 + IEEE80211_WEP_EXTIVLEN; 333 334 vap->iv_rtsthreshold = IEEE80211_RTS_DEFAULT; 335 vap->iv_fragthreshold = IEEE80211_FRAG_DEFAULT; 336 vap->iv_bmiss_max = IEEE80211_BMISS_MAX; 337 callout_init_mtx(&vap->iv_swbmiss, IEEE80211_LOCK_OBJ(ic), 0); 338 callout_init(&vap->iv_mgtsend, 1); 339 TASK_INIT(&vap->iv_nstate_task, 0, ieee80211_newstate_cb, vap); 340 TASK_INIT(&vap->iv_swbmiss_task, 0, beacon_swmiss, vap); 341 /* 342 * Install default tx rate handling: no fixed rate, lowest 343 * supported rate for mgmt and multicast frames. Default 344 * max retry count. These settings can be changed by the 345 * driver and/or user applications. 346 */ 347 for (i = IEEE80211_MODE_11A; i < IEEE80211_MODE_MAX; i++) { 348 const struct ieee80211_rateset *rs = &ic->ic_sup_rates[i]; 349 350 vap->iv_txparms[i].ucastrate = IEEE80211_FIXED_RATE_NONE; 351 352 /* 353 * Setting the management rate to MCS 0 assumes that the 354 * BSS Basic rate set is empty and the BSS Basic MCS set 355 * is not. 356 * 357 * Since we're not checking this, default to the lowest 358 * defined rate for this mode. 359 * 360 * At least one 11n AP (DLINK DIR-825) is reported to drop 361 * some MCS management traffic (eg BA response frames.) 362 * 363 * See also: 9.6.0 of the 802.11n-2009 specification. 364 */ 365 #ifdef NOTYET 366 if (i == IEEE80211_MODE_11NA || i == IEEE80211_MODE_11NG) { 367 vap->iv_txparms[i].mgmtrate = 0 | IEEE80211_RATE_MCS; 368 vap->iv_txparms[i].mcastrate = 0 | IEEE80211_RATE_MCS; 369 } else { 370 vap->iv_txparms[i].mgmtrate = 371 rs->rs_rates[0] & IEEE80211_RATE_VAL; 372 vap->iv_txparms[i].mcastrate = 373 rs->rs_rates[0] & IEEE80211_RATE_VAL; 374 } 375 #endif 376 vap->iv_txparms[i].mgmtrate = rs->rs_rates[0] & IEEE80211_RATE_VAL; 377 vap->iv_txparms[i].mcastrate = rs->rs_rates[0] & IEEE80211_RATE_VAL; 378 vap->iv_txparms[i].maxretry = IEEE80211_TXMAX_DEFAULT; 379 } 380 vap->iv_roaming = IEEE80211_ROAMING_AUTO; 381 382 vap->iv_update_beacon = null_update_beacon; 383 vap->iv_deliver_data = ieee80211_deliver_data; 384 385 /* attach support for operating mode */ 386 ic->ic_vattach[vap->iv_opmode](vap); 387 } 388 389 void 390 ieee80211_proto_vdetach(struct ieee80211vap *vap) 391 { 392 #define FREEAPPIE(ie) do { \ 393 if (ie != NULL) \ 394 IEEE80211_FREE(ie, M_80211_NODE_IE); \ 395 } while (0) 396 /* 397 * Detach operating mode module. 398 */ 399 if (vap->iv_opdetach != NULL) 400 vap->iv_opdetach(vap); 401 /* 402 * This should not be needed as we detach when reseting 403 * the state but be conservative here since the 404 * authenticator may do things like spawn kernel threads. 405 */ 406 if (vap->iv_auth->ia_detach != NULL) 407 vap->iv_auth->ia_detach(vap); 408 /* 409 * Detach any ACL'ator. 410 */ 411 if (vap->iv_acl != NULL) 412 vap->iv_acl->iac_detach(vap); 413 414 FREEAPPIE(vap->iv_appie_beacon); 415 FREEAPPIE(vap->iv_appie_probereq); 416 FREEAPPIE(vap->iv_appie_proberesp); 417 FREEAPPIE(vap->iv_appie_assocreq); 418 FREEAPPIE(vap->iv_appie_assocresp); 419 FREEAPPIE(vap->iv_appie_wpa); 420 #undef FREEAPPIE 421 } 422 423 /* 424 * Simple-minded authenticator module support. 425 */ 426 427 #define IEEE80211_AUTH_MAX (IEEE80211_AUTH_WPA+1) 428 /* XXX well-known names */ 429 static const char *auth_modnames[IEEE80211_AUTH_MAX] = { 430 "wlan_internal", /* IEEE80211_AUTH_NONE */ 431 "wlan_internal", /* IEEE80211_AUTH_OPEN */ 432 "wlan_internal", /* IEEE80211_AUTH_SHARED */ 433 "wlan_xauth", /* IEEE80211_AUTH_8021X */ 434 "wlan_internal", /* IEEE80211_AUTH_AUTO */ 435 "wlan_xauth", /* IEEE80211_AUTH_WPA */ 436 }; 437 static const struct ieee80211_authenticator *authenticators[IEEE80211_AUTH_MAX]; 438 439 static const struct ieee80211_authenticator auth_internal = { 440 .ia_name = "wlan_internal", 441 .ia_attach = NULL, 442 .ia_detach = NULL, 443 .ia_node_join = NULL, 444 .ia_node_leave = NULL, 445 }; 446 447 /* 448 * Setup internal authenticators once; they are never unregistered. 449 */ 450 static void 451 ieee80211_auth_setup(void) 452 { 453 ieee80211_authenticator_register(IEEE80211_AUTH_OPEN, &auth_internal); 454 ieee80211_authenticator_register(IEEE80211_AUTH_SHARED, &auth_internal); 455 ieee80211_authenticator_register(IEEE80211_AUTH_AUTO, &auth_internal); 456 } 457 SYSINIT(wlan_auth, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_auth_setup, NULL); 458 459 const struct ieee80211_authenticator * 460 ieee80211_authenticator_get(int auth) 461 { 462 if (auth >= IEEE80211_AUTH_MAX) 463 return NULL; 464 if (authenticators[auth] == NULL) 465 ieee80211_load_module(auth_modnames[auth]); 466 return authenticators[auth]; 467 } 468 469 void 470 ieee80211_authenticator_register(int type, 471 const struct ieee80211_authenticator *auth) 472 { 473 if (type >= IEEE80211_AUTH_MAX) 474 return; 475 authenticators[type] = auth; 476 } 477 478 void 479 ieee80211_authenticator_unregister(int type) 480 { 481 482 if (type >= IEEE80211_AUTH_MAX) 483 return; 484 authenticators[type] = NULL; 485 } 486 487 /* 488 * Very simple-minded ACL module support. 489 */ 490 /* XXX just one for now */ 491 static const struct ieee80211_aclator *acl = NULL; 492 493 void 494 ieee80211_aclator_register(const struct ieee80211_aclator *iac) 495 { 496 printf("wlan: %s acl policy registered\n", iac->iac_name); 497 acl = iac; 498 } 499 500 void 501 ieee80211_aclator_unregister(const struct ieee80211_aclator *iac) 502 { 503 if (acl == iac) 504 acl = NULL; 505 printf("wlan: %s acl policy unregistered\n", iac->iac_name); 506 } 507 508 const struct ieee80211_aclator * 509 ieee80211_aclator_get(const char *name) 510 { 511 if (acl == NULL) 512 ieee80211_load_module("wlan_acl"); 513 return acl != NULL && strcmp(acl->iac_name, name) == 0 ? acl : NULL; 514 } 515 516 void 517 ieee80211_print_essid(const uint8_t *essid, int len) 518 { 519 const uint8_t *p; 520 int i; 521 522 if (len > IEEE80211_NWID_LEN) 523 len = IEEE80211_NWID_LEN; 524 /* determine printable or not */ 525 for (i = 0, p = essid; i < len; i++, p++) { 526 if (*p < ' ' || *p > 0x7e) 527 break; 528 } 529 if (i == len) { 530 printf("\""); 531 for (i = 0, p = essid; i < len; i++, p++) 532 printf("%c", *p); 533 printf("\""); 534 } else { 535 printf("0x"); 536 for (i = 0, p = essid; i < len; i++, p++) 537 printf("%02x", *p); 538 } 539 } 540 541 void 542 ieee80211_dump_pkt(struct ieee80211com *ic, 543 const uint8_t *buf, int len, int rate, int rssi) 544 { 545 const struct ieee80211_frame *wh; 546 int i; 547 548 wh = (const struct ieee80211_frame *)buf; 549 switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) { 550 case IEEE80211_FC1_DIR_NODS: 551 printf("NODS %s", ether_sprintf(wh->i_addr2)); 552 printf("->%s", ether_sprintf(wh->i_addr1)); 553 printf("(%s)", ether_sprintf(wh->i_addr3)); 554 break; 555 case IEEE80211_FC1_DIR_TODS: 556 printf("TODS %s", ether_sprintf(wh->i_addr2)); 557 printf("->%s", ether_sprintf(wh->i_addr3)); 558 printf("(%s)", ether_sprintf(wh->i_addr1)); 559 break; 560 case IEEE80211_FC1_DIR_FROMDS: 561 printf("FRDS %s", ether_sprintf(wh->i_addr3)); 562 printf("->%s", ether_sprintf(wh->i_addr1)); 563 printf("(%s)", ether_sprintf(wh->i_addr2)); 564 break; 565 case IEEE80211_FC1_DIR_DSTODS: 566 printf("DSDS %s", ether_sprintf((const uint8_t *)&wh[1])); 567 printf("->%s", ether_sprintf(wh->i_addr3)); 568 printf("(%s", ether_sprintf(wh->i_addr2)); 569 printf("->%s)", ether_sprintf(wh->i_addr1)); 570 break; 571 } 572 switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) { 573 case IEEE80211_FC0_TYPE_DATA: 574 printf(" data"); 575 break; 576 case IEEE80211_FC0_TYPE_MGT: 577 printf(" %s", ieee80211_mgt_subtype_name(wh->i_fc[0])); 578 break; 579 default: 580 printf(" type#%d", wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK); 581 break; 582 } 583 if (IEEE80211_QOS_HAS_SEQ(wh)) { 584 const struct ieee80211_qosframe *qwh = 585 (const struct ieee80211_qosframe *)buf; 586 printf(" QoS [TID %u%s]", qwh->i_qos[0] & IEEE80211_QOS_TID, 587 qwh->i_qos[0] & IEEE80211_QOS_ACKPOLICY ? " ACM" : ""); 588 } 589 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 590 int off; 591 592 off = ieee80211_anyhdrspace(ic, wh); 593 printf(" WEP [IV %.02x %.02x %.02x", 594 buf[off+0], buf[off+1], buf[off+2]); 595 if (buf[off+IEEE80211_WEP_IVLEN] & IEEE80211_WEP_EXTIV) 596 printf(" %.02x %.02x %.02x", 597 buf[off+4], buf[off+5], buf[off+6]); 598 printf(" KID %u]", buf[off+IEEE80211_WEP_IVLEN] >> 6); 599 } 600 if (rate >= 0) 601 printf(" %dM", rate / 2); 602 if (rssi >= 0) 603 printf(" +%d", rssi); 604 printf("\n"); 605 if (len > 0) { 606 for (i = 0; i < len; i++) { 607 if ((i & 1) == 0) 608 printf(" "); 609 printf("%02x", buf[i]); 610 } 611 printf("\n"); 612 } 613 } 614 615 static __inline int 616 findrix(const struct ieee80211_rateset *rs, int r) 617 { 618 int i; 619 620 for (i = 0; i < rs->rs_nrates; i++) 621 if ((rs->rs_rates[i] & IEEE80211_RATE_VAL) == r) 622 return i; 623 return -1; 624 } 625 626 int 627 ieee80211_fix_rate(struct ieee80211_node *ni, 628 struct ieee80211_rateset *nrs, int flags) 629 { 630 struct ieee80211vap *vap = ni->ni_vap; 631 struct ieee80211com *ic = ni->ni_ic; 632 int i, j, rix, error; 633 int okrate, badrate, fixedrate, ucastrate; 634 const struct ieee80211_rateset *srs; 635 uint8_t r; 636 637 error = 0; 638 okrate = badrate = 0; 639 ucastrate = vap->iv_txparms[ieee80211_chan2mode(ni->ni_chan)].ucastrate; 640 if (ucastrate != IEEE80211_FIXED_RATE_NONE) { 641 /* 642 * Workaround awkwardness with fixed rate. We are called 643 * to check both the legacy rate set and the HT rate set 644 * but we must apply any legacy fixed rate check only to the 645 * legacy rate set and vice versa. We cannot tell what type 646 * of rate set we've been given (legacy or HT) but we can 647 * distinguish the fixed rate type (MCS have 0x80 set). 648 * So to deal with this the caller communicates whether to 649 * check MCS or legacy rate using the flags and we use the 650 * type of any fixed rate to avoid applying an MCS to a 651 * legacy rate and vice versa. 652 */ 653 if (ucastrate & 0x80) { 654 if (flags & IEEE80211_F_DOFRATE) 655 flags &= ~IEEE80211_F_DOFRATE; 656 } else if ((ucastrate & 0x80) == 0) { 657 if (flags & IEEE80211_F_DOFMCS) 658 flags &= ~IEEE80211_F_DOFMCS; 659 } 660 /* NB: required to make MCS match below work */ 661 ucastrate &= IEEE80211_RATE_VAL; 662 } 663 fixedrate = IEEE80211_FIXED_RATE_NONE; 664 /* 665 * XXX we are called to process both MCS and legacy rates; 666 * we must use the appropriate basic rate set or chaos will 667 * ensue; for now callers that want MCS must supply 668 * IEEE80211_F_DOBRS; at some point we'll need to split this 669 * function so there are two variants, one for MCS and one 670 * for legacy rates. 671 */ 672 if (flags & IEEE80211_F_DOBRS) 673 srs = (const struct ieee80211_rateset *) 674 ieee80211_get_suphtrates(ic, ni->ni_chan); 675 else 676 srs = ieee80211_get_suprates(ic, ni->ni_chan); 677 for (i = 0; i < nrs->rs_nrates; ) { 678 if (flags & IEEE80211_F_DOSORT) { 679 /* 680 * Sort rates. 681 */ 682 for (j = i + 1; j < nrs->rs_nrates; j++) { 683 if (IEEE80211_RV(nrs->rs_rates[i]) > 684 IEEE80211_RV(nrs->rs_rates[j])) { 685 r = nrs->rs_rates[i]; 686 nrs->rs_rates[i] = nrs->rs_rates[j]; 687 nrs->rs_rates[j] = r; 688 } 689 } 690 } 691 r = nrs->rs_rates[i] & IEEE80211_RATE_VAL; 692 badrate = r; 693 /* 694 * Check for fixed rate. 695 */ 696 if (r == ucastrate) 697 fixedrate = r; 698 /* 699 * Check against supported rates. 700 */ 701 rix = findrix(srs, r); 702 if (flags & IEEE80211_F_DONEGO) { 703 if (rix < 0) { 704 /* 705 * A rate in the node's rate set is not 706 * supported. If this is a basic rate and we 707 * are operating as a STA then this is an error. 708 * Otherwise we just discard/ignore the rate. 709 */ 710 if ((flags & IEEE80211_F_JOIN) && 711 (nrs->rs_rates[i] & IEEE80211_RATE_BASIC)) 712 error++; 713 } else if ((flags & IEEE80211_F_JOIN) == 0) { 714 /* 715 * Overwrite with the supported rate 716 * value so any basic rate bit is set. 717 */ 718 nrs->rs_rates[i] = srs->rs_rates[rix]; 719 } 720 } 721 if ((flags & IEEE80211_F_DODEL) && rix < 0) { 722 /* 723 * Delete unacceptable rates. 724 */ 725 nrs->rs_nrates--; 726 for (j = i; j < nrs->rs_nrates; j++) 727 nrs->rs_rates[j] = nrs->rs_rates[j + 1]; 728 nrs->rs_rates[j] = 0; 729 continue; 730 } 731 if (rix >= 0) 732 okrate = nrs->rs_rates[i]; 733 i++; 734 } 735 if (okrate == 0 || error != 0 || 736 ((flags & (IEEE80211_F_DOFRATE|IEEE80211_F_DOFMCS)) && 737 fixedrate != ucastrate)) { 738 IEEE80211_NOTE(vap, IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni, 739 "%s: flags 0x%x okrate %d error %d fixedrate 0x%x " 740 "ucastrate %x\n", __func__, fixedrate, ucastrate, flags); 741 return badrate | IEEE80211_RATE_BASIC; 742 } else 743 return IEEE80211_RV(okrate); 744 } 745 746 /* 747 * Reset 11g-related state. 748 */ 749 void 750 ieee80211_reset_erp(struct ieee80211com *ic) 751 { 752 ic->ic_flags &= ~IEEE80211_F_USEPROT; 753 ic->ic_nonerpsta = 0; 754 ic->ic_longslotsta = 0; 755 /* 756 * Short slot time is enabled only when operating in 11g 757 * and not in an IBSS. We must also honor whether or not 758 * the driver is capable of doing it. 759 */ 760 ieee80211_set_shortslottime(ic, 761 IEEE80211_IS_CHAN_A(ic->ic_curchan) || 762 IEEE80211_IS_CHAN_HT(ic->ic_curchan) || 763 (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 764 ic->ic_opmode == IEEE80211_M_HOSTAP && 765 (ic->ic_caps & IEEE80211_C_SHSLOT))); 766 /* 767 * Set short preamble and ERP barker-preamble flags. 768 */ 769 if (IEEE80211_IS_CHAN_A(ic->ic_curchan) || 770 (ic->ic_caps & IEEE80211_C_SHPREAMBLE)) { 771 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 772 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 773 } else { 774 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 775 ic->ic_flags |= IEEE80211_F_USEBARKER; 776 } 777 } 778 779 /* 780 * Set the short slot time state and notify the driver. 781 */ 782 void 783 ieee80211_set_shortslottime(struct ieee80211com *ic, int onoff) 784 { 785 if (onoff) 786 ic->ic_flags |= IEEE80211_F_SHSLOT; 787 else 788 ic->ic_flags &= ~IEEE80211_F_SHSLOT; 789 /* notify driver */ 790 if (ic->ic_updateslot != NULL) 791 ic->ic_updateslot(ic); 792 } 793 794 /* 795 * Check if the specified rate set supports ERP. 796 * NB: the rate set is assumed to be sorted. 797 */ 798 int 799 ieee80211_iserp_rateset(const struct ieee80211_rateset *rs) 800 { 801 static const int rates[] = { 2, 4, 11, 22, 12, 24, 48 }; 802 int i, j; 803 804 if (rs->rs_nrates < nitems(rates)) 805 return 0; 806 for (i = 0; i < nitems(rates); i++) { 807 for (j = 0; j < rs->rs_nrates; j++) { 808 int r = rs->rs_rates[j] & IEEE80211_RATE_VAL; 809 if (rates[i] == r) 810 goto next; 811 if (r > rates[i]) 812 return 0; 813 } 814 return 0; 815 next: 816 ; 817 } 818 return 1; 819 } 820 821 /* 822 * Mark the basic rates for the rate table based on the 823 * operating mode. For real 11g we mark all the 11b rates 824 * and 6, 12, and 24 OFDM. For 11b compatibility we mark only 825 * 11b rates. There's also a pseudo 11a-mode used to mark only 826 * the basic OFDM rates. 827 */ 828 static void 829 setbasicrates(struct ieee80211_rateset *rs, 830 enum ieee80211_phymode mode, int add) 831 { 832 static const struct ieee80211_rateset basic[IEEE80211_MODE_MAX] = { 833 [IEEE80211_MODE_11A] = { 3, { 12, 24, 48 } }, 834 [IEEE80211_MODE_11B] = { 2, { 2, 4 } }, 835 /* NB: mixed b/g */ 836 [IEEE80211_MODE_11G] = { 4, { 2, 4, 11, 22 } }, 837 [IEEE80211_MODE_TURBO_A] = { 3, { 12, 24, 48 } }, 838 [IEEE80211_MODE_TURBO_G] = { 4, { 2, 4, 11, 22 } }, 839 [IEEE80211_MODE_STURBO_A] = { 3, { 12, 24, 48 } }, 840 [IEEE80211_MODE_HALF] = { 3, { 6, 12, 24 } }, 841 [IEEE80211_MODE_QUARTER] = { 3, { 3, 6, 12 } }, 842 [IEEE80211_MODE_11NA] = { 3, { 12, 24, 48 } }, 843 /* NB: mixed b/g */ 844 [IEEE80211_MODE_11NG] = { 4, { 2, 4, 11, 22 } }, 845 }; 846 int i, j; 847 848 for (i = 0; i < rs->rs_nrates; i++) { 849 if (!add) 850 rs->rs_rates[i] &= IEEE80211_RATE_VAL; 851 for (j = 0; j < basic[mode].rs_nrates; j++) 852 if (basic[mode].rs_rates[j] == rs->rs_rates[i]) { 853 rs->rs_rates[i] |= IEEE80211_RATE_BASIC; 854 break; 855 } 856 } 857 } 858 859 /* 860 * Set the basic rates in a rate set. 861 */ 862 void 863 ieee80211_setbasicrates(struct ieee80211_rateset *rs, 864 enum ieee80211_phymode mode) 865 { 866 setbasicrates(rs, mode, 0); 867 } 868 869 /* 870 * Add basic rates to a rate set. 871 */ 872 void 873 ieee80211_addbasicrates(struct ieee80211_rateset *rs, 874 enum ieee80211_phymode mode) 875 { 876 setbasicrates(rs, mode, 1); 877 } 878 879 /* 880 * WME protocol support. 881 * 882 * The default 11a/b/g/n parameters come from the WiFi Alliance WMM 883 * System Interopability Test Plan (v1.4, Appendix F) and the 802.11n 884 * Draft 2.0 Test Plan (Appendix D). 885 * 886 * Static/Dynamic Turbo mode settings come from Atheros. 887 */ 888 typedef struct phyParamType { 889 uint8_t aifsn; 890 uint8_t logcwmin; 891 uint8_t logcwmax; 892 uint16_t txopLimit; 893 uint8_t acm; 894 } paramType; 895 896 static const struct phyParamType phyParamForAC_BE[IEEE80211_MODE_MAX] = { 897 [IEEE80211_MODE_AUTO] = { 3, 4, 6, 0, 0 }, 898 [IEEE80211_MODE_11A] = { 3, 4, 6, 0, 0 }, 899 [IEEE80211_MODE_11B] = { 3, 4, 6, 0, 0 }, 900 [IEEE80211_MODE_11G] = { 3, 4, 6, 0, 0 }, 901 [IEEE80211_MODE_FH] = { 3, 4, 6, 0, 0 }, 902 [IEEE80211_MODE_TURBO_A]= { 2, 3, 5, 0, 0 }, 903 [IEEE80211_MODE_TURBO_G]= { 2, 3, 5, 0, 0 }, 904 [IEEE80211_MODE_STURBO_A]={ 2, 3, 5, 0, 0 }, 905 [IEEE80211_MODE_HALF] = { 3, 4, 6, 0, 0 }, 906 [IEEE80211_MODE_QUARTER]= { 3, 4, 6, 0, 0 }, 907 [IEEE80211_MODE_11NA] = { 3, 4, 6, 0, 0 }, 908 [IEEE80211_MODE_11NG] = { 3, 4, 6, 0, 0 }, 909 }; 910 static const struct phyParamType phyParamForAC_BK[IEEE80211_MODE_MAX] = { 911 [IEEE80211_MODE_AUTO] = { 7, 4, 10, 0, 0 }, 912 [IEEE80211_MODE_11A] = { 7, 4, 10, 0, 0 }, 913 [IEEE80211_MODE_11B] = { 7, 4, 10, 0, 0 }, 914 [IEEE80211_MODE_11G] = { 7, 4, 10, 0, 0 }, 915 [IEEE80211_MODE_FH] = { 7, 4, 10, 0, 0 }, 916 [IEEE80211_MODE_TURBO_A]= { 7, 3, 10, 0, 0 }, 917 [IEEE80211_MODE_TURBO_G]= { 7, 3, 10, 0, 0 }, 918 [IEEE80211_MODE_STURBO_A]={ 7, 3, 10, 0, 0 }, 919 [IEEE80211_MODE_HALF] = { 7, 4, 10, 0, 0 }, 920 [IEEE80211_MODE_QUARTER]= { 7, 4, 10, 0, 0 }, 921 [IEEE80211_MODE_11NA] = { 7, 4, 10, 0, 0 }, 922 [IEEE80211_MODE_11NG] = { 7, 4, 10, 0, 0 }, 923 }; 924 static const struct phyParamType phyParamForAC_VI[IEEE80211_MODE_MAX] = { 925 [IEEE80211_MODE_AUTO] = { 1, 3, 4, 94, 0 }, 926 [IEEE80211_MODE_11A] = { 1, 3, 4, 94, 0 }, 927 [IEEE80211_MODE_11B] = { 1, 3, 4, 188, 0 }, 928 [IEEE80211_MODE_11G] = { 1, 3, 4, 94, 0 }, 929 [IEEE80211_MODE_FH] = { 1, 3, 4, 188, 0 }, 930 [IEEE80211_MODE_TURBO_A]= { 1, 2, 3, 94, 0 }, 931 [IEEE80211_MODE_TURBO_G]= { 1, 2, 3, 94, 0 }, 932 [IEEE80211_MODE_STURBO_A]={ 1, 2, 3, 94, 0 }, 933 [IEEE80211_MODE_HALF] = { 1, 3, 4, 94, 0 }, 934 [IEEE80211_MODE_QUARTER]= { 1, 3, 4, 94, 0 }, 935 [IEEE80211_MODE_11NA] = { 1, 3, 4, 94, 0 }, 936 [IEEE80211_MODE_11NG] = { 1, 3, 4, 94, 0 }, 937 }; 938 static const struct phyParamType phyParamForAC_VO[IEEE80211_MODE_MAX] = { 939 [IEEE80211_MODE_AUTO] = { 1, 2, 3, 47, 0 }, 940 [IEEE80211_MODE_11A] = { 1, 2, 3, 47, 0 }, 941 [IEEE80211_MODE_11B] = { 1, 2, 3, 102, 0 }, 942 [IEEE80211_MODE_11G] = { 1, 2, 3, 47, 0 }, 943 [IEEE80211_MODE_FH] = { 1, 2, 3, 102, 0 }, 944 [IEEE80211_MODE_TURBO_A]= { 1, 2, 2, 47, 0 }, 945 [IEEE80211_MODE_TURBO_G]= { 1, 2, 2, 47, 0 }, 946 [IEEE80211_MODE_STURBO_A]={ 1, 2, 2, 47, 0 }, 947 [IEEE80211_MODE_HALF] = { 1, 2, 3, 47, 0 }, 948 [IEEE80211_MODE_QUARTER]= { 1, 2, 3, 47, 0 }, 949 [IEEE80211_MODE_11NA] = { 1, 2, 3, 47, 0 }, 950 [IEEE80211_MODE_11NG] = { 1, 2, 3, 47, 0 }, 951 }; 952 953 static const struct phyParamType bssPhyParamForAC_BE[IEEE80211_MODE_MAX] = { 954 [IEEE80211_MODE_AUTO] = { 3, 4, 10, 0, 0 }, 955 [IEEE80211_MODE_11A] = { 3, 4, 10, 0, 0 }, 956 [IEEE80211_MODE_11B] = { 3, 4, 10, 0, 0 }, 957 [IEEE80211_MODE_11G] = { 3, 4, 10, 0, 0 }, 958 [IEEE80211_MODE_FH] = { 3, 4, 10, 0, 0 }, 959 [IEEE80211_MODE_TURBO_A]= { 2, 3, 10, 0, 0 }, 960 [IEEE80211_MODE_TURBO_G]= { 2, 3, 10, 0, 0 }, 961 [IEEE80211_MODE_STURBO_A]={ 2, 3, 10, 0, 0 }, 962 [IEEE80211_MODE_HALF] = { 3, 4, 10, 0, 0 }, 963 [IEEE80211_MODE_QUARTER]= { 3, 4, 10, 0, 0 }, 964 [IEEE80211_MODE_11NA] = { 3, 4, 10, 0, 0 }, 965 [IEEE80211_MODE_11NG] = { 3, 4, 10, 0, 0 }, 966 }; 967 static const struct phyParamType bssPhyParamForAC_VI[IEEE80211_MODE_MAX] = { 968 [IEEE80211_MODE_AUTO] = { 2, 3, 4, 94, 0 }, 969 [IEEE80211_MODE_11A] = { 2, 3, 4, 94, 0 }, 970 [IEEE80211_MODE_11B] = { 2, 3, 4, 188, 0 }, 971 [IEEE80211_MODE_11G] = { 2, 3, 4, 94, 0 }, 972 [IEEE80211_MODE_FH] = { 2, 3, 4, 188, 0 }, 973 [IEEE80211_MODE_TURBO_A]= { 2, 2, 3, 94, 0 }, 974 [IEEE80211_MODE_TURBO_G]= { 2, 2, 3, 94, 0 }, 975 [IEEE80211_MODE_STURBO_A]={ 2, 2, 3, 94, 0 }, 976 [IEEE80211_MODE_HALF] = { 2, 3, 4, 94, 0 }, 977 [IEEE80211_MODE_QUARTER]= { 2, 3, 4, 94, 0 }, 978 [IEEE80211_MODE_11NA] = { 2, 3, 4, 94, 0 }, 979 [IEEE80211_MODE_11NG] = { 2, 3, 4, 94, 0 }, 980 }; 981 static const struct phyParamType bssPhyParamForAC_VO[IEEE80211_MODE_MAX] = { 982 [IEEE80211_MODE_AUTO] = { 2, 2, 3, 47, 0 }, 983 [IEEE80211_MODE_11A] = { 2, 2, 3, 47, 0 }, 984 [IEEE80211_MODE_11B] = { 2, 2, 3, 102, 0 }, 985 [IEEE80211_MODE_11G] = { 2, 2, 3, 47, 0 }, 986 [IEEE80211_MODE_FH] = { 2, 2, 3, 102, 0 }, 987 [IEEE80211_MODE_TURBO_A]= { 1, 2, 2, 47, 0 }, 988 [IEEE80211_MODE_TURBO_G]= { 1, 2, 2, 47, 0 }, 989 [IEEE80211_MODE_STURBO_A]={ 1, 2, 2, 47, 0 }, 990 [IEEE80211_MODE_HALF] = { 2, 2, 3, 47, 0 }, 991 [IEEE80211_MODE_QUARTER]= { 2, 2, 3, 47, 0 }, 992 [IEEE80211_MODE_11NA] = { 2, 2, 3, 47, 0 }, 993 [IEEE80211_MODE_11NG] = { 2, 2, 3, 47, 0 }, 994 }; 995 996 static void 997 _setifsparams(struct wmeParams *wmep, const paramType *phy) 998 { 999 wmep->wmep_aifsn = phy->aifsn; 1000 wmep->wmep_logcwmin = phy->logcwmin; 1001 wmep->wmep_logcwmax = phy->logcwmax; 1002 wmep->wmep_txopLimit = phy->txopLimit; 1003 } 1004 1005 static void 1006 setwmeparams(struct ieee80211vap *vap, const char *type, int ac, 1007 struct wmeParams *wmep, const paramType *phy) 1008 { 1009 wmep->wmep_acm = phy->acm; 1010 _setifsparams(wmep, phy); 1011 1012 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 1013 "set %s (%s) [acm %u aifsn %u logcwmin %u logcwmax %u txop %u]\n", 1014 ieee80211_wme_acnames[ac], type, 1015 wmep->wmep_acm, wmep->wmep_aifsn, wmep->wmep_logcwmin, 1016 wmep->wmep_logcwmax, wmep->wmep_txopLimit); 1017 } 1018 1019 static void 1020 ieee80211_wme_initparams_locked(struct ieee80211vap *vap) 1021 { 1022 struct ieee80211com *ic = vap->iv_ic; 1023 struct ieee80211_wme_state *wme = &ic->ic_wme; 1024 const paramType *pPhyParam, *pBssPhyParam; 1025 struct wmeParams *wmep; 1026 enum ieee80211_phymode mode; 1027 int i; 1028 1029 IEEE80211_LOCK_ASSERT(ic); 1030 1031 if ((ic->ic_caps & IEEE80211_C_WME) == 0 || ic->ic_nrunning > 1) 1032 return; 1033 1034 /* 1035 * Clear the wme cap_info field so a qoscount from a previous 1036 * vap doesn't confuse later code which only parses the beacon 1037 * field and updates hardware when said field changes. 1038 * Otherwise the hardware is programmed with defaults, not what 1039 * the beacon actually announces. 1040 */ 1041 wme->wme_wmeChanParams.cap_info = 0; 1042 1043 /* 1044 * Select mode; we can be called early in which case we 1045 * always use auto mode. We know we'll be called when 1046 * entering the RUN state with bsschan setup properly 1047 * so state will eventually get set correctly 1048 */ 1049 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC) 1050 mode = ieee80211_chan2mode(ic->ic_bsschan); 1051 else 1052 mode = IEEE80211_MODE_AUTO; 1053 for (i = 0; i < WME_NUM_AC; i++) { 1054 switch (i) { 1055 case WME_AC_BK: 1056 pPhyParam = &phyParamForAC_BK[mode]; 1057 pBssPhyParam = &phyParamForAC_BK[mode]; 1058 break; 1059 case WME_AC_VI: 1060 pPhyParam = &phyParamForAC_VI[mode]; 1061 pBssPhyParam = &bssPhyParamForAC_VI[mode]; 1062 break; 1063 case WME_AC_VO: 1064 pPhyParam = &phyParamForAC_VO[mode]; 1065 pBssPhyParam = &bssPhyParamForAC_VO[mode]; 1066 break; 1067 case WME_AC_BE: 1068 default: 1069 pPhyParam = &phyParamForAC_BE[mode]; 1070 pBssPhyParam = &bssPhyParamForAC_BE[mode]; 1071 break; 1072 } 1073 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i]; 1074 if (ic->ic_opmode == IEEE80211_M_HOSTAP) { 1075 setwmeparams(vap, "chan", i, wmep, pPhyParam); 1076 } else { 1077 setwmeparams(vap, "chan", i, wmep, pBssPhyParam); 1078 } 1079 wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i]; 1080 setwmeparams(vap, "bss ", i, wmep, pBssPhyParam); 1081 } 1082 /* NB: check ic_bss to avoid NULL deref on initial attach */ 1083 if (vap->iv_bss != NULL) { 1084 /* 1085 * Calculate aggressive mode switching threshold based 1086 * on beacon interval. This doesn't need locking since 1087 * we're only called before entering the RUN state at 1088 * which point we start sending beacon frames. 1089 */ 1090 wme->wme_hipri_switch_thresh = 1091 (HIGH_PRI_SWITCH_THRESH * vap->iv_bss->ni_intval) / 100; 1092 wme->wme_flags &= ~WME_F_AGGRMODE; 1093 ieee80211_wme_updateparams(vap); 1094 } 1095 } 1096 1097 void 1098 ieee80211_wme_initparams(struct ieee80211vap *vap) 1099 { 1100 struct ieee80211com *ic = vap->iv_ic; 1101 1102 IEEE80211_LOCK(ic); 1103 ieee80211_wme_initparams_locked(vap); 1104 IEEE80211_UNLOCK(ic); 1105 } 1106 1107 /* 1108 * Update WME parameters for ourself and the BSS. 1109 */ 1110 void 1111 ieee80211_wme_updateparams_locked(struct ieee80211vap *vap) 1112 { 1113 static const paramType aggrParam[IEEE80211_MODE_MAX] = { 1114 [IEEE80211_MODE_AUTO] = { 2, 4, 10, 64, 0 }, 1115 [IEEE80211_MODE_11A] = { 2, 4, 10, 64, 0 }, 1116 [IEEE80211_MODE_11B] = { 2, 5, 10, 64, 0 }, 1117 [IEEE80211_MODE_11G] = { 2, 4, 10, 64, 0 }, 1118 [IEEE80211_MODE_FH] = { 2, 5, 10, 64, 0 }, 1119 [IEEE80211_MODE_TURBO_A] = { 1, 3, 10, 64, 0 }, 1120 [IEEE80211_MODE_TURBO_G] = { 1, 3, 10, 64, 0 }, 1121 [IEEE80211_MODE_STURBO_A] = { 1, 3, 10, 64, 0 }, 1122 [IEEE80211_MODE_HALF] = { 2, 4, 10, 64, 0 }, 1123 [IEEE80211_MODE_QUARTER] = { 2, 4, 10, 64, 0 }, 1124 [IEEE80211_MODE_11NA] = { 2, 4, 10, 64, 0 }, /* XXXcheck*/ 1125 [IEEE80211_MODE_11NG] = { 2, 4, 10, 64, 0 }, /* XXXcheck*/ 1126 }; 1127 struct ieee80211com *ic = vap->iv_ic; 1128 struct ieee80211_wme_state *wme = &ic->ic_wme; 1129 const struct wmeParams *wmep; 1130 struct wmeParams *chanp, *bssp; 1131 enum ieee80211_phymode mode; 1132 int i; 1133 int do_aggrmode = 0; 1134 1135 /* 1136 * Set up the channel access parameters for the physical 1137 * device. First populate the configured settings. 1138 */ 1139 for (i = 0; i < WME_NUM_AC; i++) { 1140 chanp = &wme->wme_chanParams.cap_wmeParams[i]; 1141 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i]; 1142 chanp->wmep_aifsn = wmep->wmep_aifsn; 1143 chanp->wmep_logcwmin = wmep->wmep_logcwmin; 1144 chanp->wmep_logcwmax = wmep->wmep_logcwmax; 1145 chanp->wmep_txopLimit = wmep->wmep_txopLimit; 1146 1147 chanp = &wme->wme_bssChanParams.cap_wmeParams[i]; 1148 wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i]; 1149 chanp->wmep_aifsn = wmep->wmep_aifsn; 1150 chanp->wmep_logcwmin = wmep->wmep_logcwmin; 1151 chanp->wmep_logcwmax = wmep->wmep_logcwmax; 1152 chanp->wmep_txopLimit = wmep->wmep_txopLimit; 1153 } 1154 1155 /* 1156 * Select mode; we can be called early in which case we 1157 * always use auto mode. We know we'll be called when 1158 * entering the RUN state with bsschan setup properly 1159 * so state will eventually get set correctly 1160 */ 1161 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC) 1162 mode = ieee80211_chan2mode(ic->ic_bsschan); 1163 else 1164 mode = IEEE80211_MODE_AUTO; 1165 1166 /* 1167 * This implements aggressive mode as found in certain 1168 * vendors' AP's. When there is significant high 1169 * priority (VI/VO) traffic in the BSS throttle back BE 1170 * traffic by using conservative parameters. Otherwise 1171 * BE uses aggressive params to optimize performance of 1172 * legacy/non-QoS traffic. 1173 */ 1174 1175 /* Hostap? Only if aggressive mode is enabled */ 1176 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 1177 (wme->wme_flags & WME_F_AGGRMODE) != 0) 1178 do_aggrmode = 1; 1179 1180 /* 1181 * Station? Only if we're in a non-QoS BSS. 1182 */ 1183 else if ((vap->iv_opmode == IEEE80211_M_STA && 1184 (vap->iv_bss->ni_flags & IEEE80211_NODE_QOS) == 0)) 1185 do_aggrmode = 1; 1186 1187 /* 1188 * IBSS? Only if we we have WME enabled. 1189 */ 1190 else if ((vap->iv_opmode == IEEE80211_M_IBSS) && 1191 (vap->iv_flags & IEEE80211_F_WME)) 1192 do_aggrmode = 1; 1193 1194 /* 1195 * If WME is disabled on this VAP, default to aggressive mode 1196 * regardless of the configuration. 1197 */ 1198 if ((vap->iv_flags & IEEE80211_F_WME) == 0) 1199 do_aggrmode = 1; 1200 1201 /* XXX WDS? */ 1202 1203 /* XXX MBSS? */ 1204 1205 if (do_aggrmode) { 1206 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE]; 1207 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE]; 1208 1209 chanp->wmep_aifsn = bssp->wmep_aifsn = aggrParam[mode].aifsn; 1210 chanp->wmep_logcwmin = bssp->wmep_logcwmin = 1211 aggrParam[mode].logcwmin; 1212 chanp->wmep_logcwmax = bssp->wmep_logcwmax = 1213 aggrParam[mode].logcwmax; 1214 chanp->wmep_txopLimit = bssp->wmep_txopLimit = 1215 (vap->iv_flags & IEEE80211_F_BURST) ? 1216 aggrParam[mode].txopLimit : 0; 1217 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 1218 "update %s (chan+bss) [acm %u aifsn %u logcwmin %u " 1219 "logcwmax %u txop %u]\n", ieee80211_wme_acnames[WME_AC_BE], 1220 chanp->wmep_acm, chanp->wmep_aifsn, chanp->wmep_logcwmin, 1221 chanp->wmep_logcwmax, chanp->wmep_txopLimit); 1222 } 1223 1224 1225 /* 1226 * Change the contention window based on the number of associated 1227 * stations. If the number of associated stations is 1 and 1228 * aggressive mode is enabled, lower the contention window even 1229 * further. 1230 */ 1231 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 1232 ic->ic_sta_assoc < 2 && (wme->wme_flags & WME_F_AGGRMODE) != 0) { 1233 static const uint8_t logCwMin[IEEE80211_MODE_MAX] = { 1234 [IEEE80211_MODE_AUTO] = 3, 1235 [IEEE80211_MODE_11A] = 3, 1236 [IEEE80211_MODE_11B] = 4, 1237 [IEEE80211_MODE_11G] = 3, 1238 [IEEE80211_MODE_FH] = 4, 1239 [IEEE80211_MODE_TURBO_A] = 3, 1240 [IEEE80211_MODE_TURBO_G] = 3, 1241 [IEEE80211_MODE_STURBO_A] = 3, 1242 [IEEE80211_MODE_HALF] = 3, 1243 [IEEE80211_MODE_QUARTER] = 3, 1244 [IEEE80211_MODE_11NA] = 3, 1245 [IEEE80211_MODE_11NG] = 3, 1246 }; 1247 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE]; 1248 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE]; 1249 1250 chanp->wmep_logcwmin = bssp->wmep_logcwmin = logCwMin[mode]; 1251 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 1252 "update %s (chan+bss) logcwmin %u\n", 1253 ieee80211_wme_acnames[WME_AC_BE], chanp->wmep_logcwmin); 1254 } 1255 1256 /* 1257 * Arrange for the beacon update. 1258 * 1259 * XXX what about MBSS, WDS? 1260 */ 1261 if (vap->iv_opmode == IEEE80211_M_HOSTAP 1262 || vap->iv_opmode == IEEE80211_M_IBSS) { 1263 /* 1264 * Arrange for a beacon update and bump the parameter 1265 * set number so associated stations load the new values. 1266 */ 1267 wme->wme_bssChanParams.cap_info = 1268 (wme->wme_bssChanParams.cap_info+1) & WME_QOSINFO_COUNT; 1269 ieee80211_beacon_notify(vap, IEEE80211_BEACON_WME); 1270 } 1271 1272 /* schedule the deferred WME update */ 1273 ieee80211_runtask(ic, &ic->ic_wme_task); 1274 1275 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 1276 "%s: WME params updated, cap_info 0x%x\n", __func__, 1277 vap->iv_opmode == IEEE80211_M_STA ? 1278 wme->wme_wmeChanParams.cap_info : 1279 wme->wme_bssChanParams.cap_info); 1280 } 1281 1282 void 1283 ieee80211_wme_updateparams(struct ieee80211vap *vap) 1284 { 1285 struct ieee80211com *ic = vap->iv_ic; 1286 1287 if (ic->ic_caps & IEEE80211_C_WME) { 1288 IEEE80211_LOCK(ic); 1289 ieee80211_wme_updateparams_locked(vap); 1290 IEEE80211_UNLOCK(ic); 1291 } 1292 } 1293 1294 static void 1295 parent_updown(void *arg, int npending) 1296 { 1297 struct ieee80211com *ic = arg; 1298 1299 ic->ic_parent(ic); 1300 } 1301 1302 static void 1303 update_mcast(void *arg, int npending) 1304 { 1305 struct ieee80211com *ic = arg; 1306 1307 ic->ic_update_mcast(ic); 1308 } 1309 1310 static void 1311 update_promisc(void *arg, int npending) 1312 { 1313 struct ieee80211com *ic = arg; 1314 1315 ic->ic_update_promisc(ic); 1316 } 1317 1318 static void 1319 update_channel(void *arg, int npending) 1320 { 1321 struct ieee80211com *ic = arg; 1322 1323 ic->ic_set_channel(ic); 1324 ieee80211_radiotap_chan_change(ic); 1325 } 1326 1327 static void 1328 update_chw(void *arg, int npending) 1329 { 1330 struct ieee80211com *ic = arg; 1331 1332 /* 1333 * XXX should we defer the channel width _config_ update until now? 1334 */ 1335 ic->ic_update_chw(ic); 1336 } 1337 1338 static void 1339 update_wme(void *arg, int npending) 1340 { 1341 struct ieee80211com *ic = arg; 1342 1343 /* 1344 * XXX should we defer the WME configuration update until now? 1345 */ 1346 ic->ic_wme.wme_update(ic); 1347 } 1348 1349 static void 1350 restart_vaps(void *arg, int npending) 1351 { 1352 struct ieee80211com *ic = arg; 1353 1354 ieee80211_suspend_all(ic); 1355 ieee80211_resume_all(ic); 1356 } 1357 1358 /* 1359 * Block until the parent is in a known state. This is 1360 * used after any operations that dispatch a task (e.g. 1361 * to auto-configure the parent device up/down). 1362 */ 1363 void 1364 ieee80211_waitfor_parent(struct ieee80211com *ic) 1365 { 1366 taskqueue_block(ic->ic_tq); 1367 ieee80211_draintask(ic, &ic->ic_parent_task); 1368 ieee80211_draintask(ic, &ic->ic_mcast_task); 1369 ieee80211_draintask(ic, &ic->ic_promisc_task); 1370 ieee80211_draintask(ic, &ic->ic_chan_task); 1371 ieee80211_draintask(ic, &ic->ic_bmiss_task); 1372 ieee80211_draintask(ic, &ic->ic_chw_task); 1373 ieee80211_draintask(ic, &ic->ic_wme_task); 1374 taskqueue_unblock(ic->ic_tq); 1375 } 1376 1377 /* 1378 * Check to see whether the current channel needs reset. 1379 * 1380 * Some devices don't handle being given an invalid channel 1381 * in their operating mode very well (eg wpi(4) will throw a 1382 * firmware exception.) 1383 * 1384 * Return 0 if we're ok, 1 if the channel needs to be reset. 1385 * 1386 * See PR kern/202502. 1387 */ 1388 static int 1389 ieee80211_start_check_reset_chan(struct ieee80211vap *vap) 1390 { 1391 struct ieee80211com *ic = vap->iv_ic; 1392 1393 if ((vap->iv_opmode == IEEE80211_M_IBSS && 1394 IEEE80211_IS_CHAN_NOADHOC(ic->ic_curchan)) || 1395 (vap->iv_opmode == IEEE80211_M_HOSTAP && 1396 IEEE80211_IS_CHAN_NOHOSTAP(ic->ic_curchan))) 1397 return (1); 1398 return (0); 1399 } 1400 1401 /* 1402 * Reset the curchan to a known good state. 1403 */ 1404 static void 1405 ieee80211_start_reset_chan(struct ieee80211vap *vap) 1406 { 1407 struct ieee80211com *ic = vap->iv_ic; 1408 1409 ic->ic_curchan = &ic->ic_channels[0]; 1410 } 1411 1412 /* 1413 * Start a vap running. If this is the first vap to be 1414 * set running on the underlying device then we 1415 * automatically bring the device up. 1416 */ 1417 void 1418 ieee80211_start_locked(struct ieee80211vap *vap) 1419 { 1420 struct ifnet *ifp = vap->iv_ifp; 1421 struct ieee80211com *ic = vap->iv_ic; 1422 1423 IEEE80211_LOCK_ASSERT(ic); 1424 1425 IEEE80211_DPRINTF(vap, 1426 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1427 "start running, %d vaps running\n", ic->ic_nrunning); 1428 1429 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) { 1430 /* 1431 * Mark us running. Note that it's ok to do this first; 1432 * if we need to bring the parent device up we defer that 1433 * to avoid dropping the com lock. We expect the device 1434 * to respond to being marked up by calling back into us 1435 * through ieee80211_start_all at which point we'll come 1436 * back in here and complete the work. 1437 */ 1438 ifp->if_drv_flags |= IFF_DRV_RUNNING; 1439 /* 1440 * We are not running; if this we are the first vap 1441 * to be brought up auto-up the parent if necessary. 1442 */ 1443 if (ic->ic_nrunning++ == 0) { 1444 1445 /* reset the channel to a known good channel */ 1446 if (ieee80211_start_check_reset_chan(vap)) 1447 ieee80211_start_reset_chan(vap); 1448 1449 IEEE80211_DPRINTF(vap, 1450 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1451 "%s: up parent %s\n", __func__, ic->ic_name); 1452 ieee80211_runtask(ic, &ic->ic_parent_task); 1453 return; 1454 } 1455 } 1456 /* 1457 * If the parent is up and running, then kick the 1458 * 802.11 state machine as appropriate. 1459 */ 1460 if (vap->iv_roaming != IEEE80211_ROAMING_MANUAL) { 1461 if (vap->iv_opmode == IEEE80211_M_STA) { 1462 #if 0 1463 /* XXX bypasses scan too easily; disable for now */ 1464 /* 1465 * Try to be intelligent about clocking the state 1466 * machine. If we're currently in RUN state then 1467 * we should be able to apply any new state/parameters 1468 * simply by re-associating. Otherwise we need to 1469 * re-scan to select an appropriate ap. 1470 */ 1471 if (vap->iv_state >= IEEE80211_S_RUN) 1472 ieee80211_new_state_locked(vap, 1473 IEEE80211_S_ASSOC, 1); 1474 else 1475 #endif 1476 ieee80211_new_state_locked(vap, 1477 IEEE80211_S_SCAN, 0); 1478 } else { 1479 /* 1480 * For monitor+wds mode there's nothing to do but 1481 * start running. Otherwise if this is the first 1482 * vap to be brought up, start a scan which may be 1483 * preempted if the station is locked to a particular 1484 * channel. 1485 */ 1486 vap->iv_flags_ext |= IEEE80211_FEXT_REINIT; 1487 if (vap->iv_opmode == IEEE80211_M_MONITOR || 1488 vap->iv_opmode == IEEE80211_M_WDS) 1489 ieee80211_new_state_locked(vap, 1490 IEEE80211_S_RUN, -1); 1491 else 1492 ieee80211_new_state_locked(vap, 1493 IEEE80211_S_SCAN, 0); 1494 } 1495 } 1496 } 1497 1498 /* 1499 * Start a single vap. 1500 */ 1501 void 1502 ieee80211_init(void *arg) 1503 { 1504 struct ieee80211vap *vap = arg; 1505 1506 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1507 "%s\n", __func__); 1508 1509 IEEE80211_LOCK(vap->iv_ic); 1510 ieee80211_start_locked(vap); 1511 IEEE80211_UNLOCK(vap->iv_ic); 1512 } 1513 1514 /* 1515 * Start all runnable vap's on a device. 1516 */ 1517 void 1518 ieee80211_start_all(struct ieee80211com *ic) 1519 { 1520 struct ieee80211vap *vap; 1521 1522 IEEE80211_LOCK(ic); 1523 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1524 struct ifnet *ifp = vap->iv_ifp; 1525 if (IFNET_IS_UP_RUNNING(ifp)) /* NB: avoid recursion */ 1526 ieee80211_start_locked(vap); 1527 } 1528 IEEE80211_UNLOCK(ic); 1529 } 1530 1531 /* 1532 * Stop a vap. We force it down using the state machine 1533 * then mark it's ifnet not running. If this is the last 1534 * vap running on the underlying device then we close it 1535 * too to insure it will be properly initialized when the 1536 * next vap is brought up. 1537 */ 1538 void 1539 ieee80211_stop_locked(struct ieee80211vap *vap) 1540 { 1541 struct ieee80211com *ic = vap->iv_ic; 1542 struct ifnet *ifp = vap->iv_ifp; 1543 1544 IEEE80211_LOCK_ASSERT(ic); 1545 1546 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1547 "stop running, %d vaps running\n", ic->ic_nrunning); 1548 1549 ieee80211_new_state_locked(vap, IEEE80211_S_INIT, -1); 1550 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 1551 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; /* mark us stopped */ 1552 if (--ic->ic_nrunning == 0) { 1553 IEEE80211_DPRINTF(vap, 1554 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1555 "down parent %s\n", ic->ic_name); 1556 ieee80211_runtask(ic, &ic->ic_parent_task); 1557 } 1558 } 1559 } 1560 1561 void 1562 ieee80211_stop(struct ieee80211vap *vap) 1563 { 1564 struct ieee80211com *ic = vap->iv_ic; 1565 1566 IEEE80211_LOCK(ic); 1567 ieee80211_stop_locked(vap); 1568 IEEE80211_UNLOCK(ic); 1569 } 1570 1571 /* 1572 * Stop all vap's running on a device. 1573 */ 1574 void 1575 ieee80211_stop_all(struct ieee80211com *ic) 1576 { 1577 struct ieee80211vap *vap; 1578 1579 IEEE80211_LOCK(ic); 1580 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1581 struct ifnet *ifp = vap->iv_ifp; 1582 if (IFNET_IS_UP_RUNNING(ifp)) /* NB: avoid recursion */ 1583 ieee80211_stop_locked(vap); 1584 } 1585 IEEE80211_UNLOCK(ic); 1586 1587 ieee80211_waitfor_parent(ic); 1588 } 1589 1590 /* 1591 * Stop all vap's running on a device and arrange 1592 * for those that were running to be resumed. 1593 */ 1594 void 1595 ieee80211_suspend_all(struct ieee80211com *ic) 1596 { 1597 struct ieee80211vap *vap; 1598 1599 IEEE80211_LOCK(ic); 1600 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1601 struct ifnet *ifp = vap->iv_ifp; 1602 if (IFNET_IS_UP_RUNNING(ifp)) { /* NB: avoid recursion */ 1603 vap->iv_flags_ext |= IEEE80211_FEXT_RESUME; 1604 ieee80211_stop_locked(vap); 1605 } 1606 } 1607 IEEE80211_UNLOCK(ic); 1608 1609 ieee80211_waitfor_parent(ic); 1610 } 1611 1612 /* 1613 * Start all vap's marked for resume. 1614 */ 1615 void 1616 ieee80211_resume_all(struct ieee80211com *ic) 1617 { 1618 struct ieee80211vap *vap; 1619 1620 IEEE80211_LOCK(ic); 1621 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1622 struct ifnet *ifp = vap->iv_ifp; 1623 if (!IFNET_IS_UP_RUNNING(ifp) && 1624 (vap->iv_flags_ext & IEEE80211_FEXT_RESUME)) { 1625 vap->iv_flags_ext &= ~IEEE80211_FEXT_RESUME; 1626 ieee80211_start_locked(vap); 1627 } 1628 } 1629 IEEE80211_UNLOCK(ic); 1630 } 1631 1632 /* 1633 * Restart all vap's running on a device. 1634 */ 1635 void 1636 ieee80211_restart_all(struct ieee80211com *ic) 1637 { 1638 /* 1639 * NB: do not use ieee80211_runtask here, we will 1640 * block & drain net80211 taskqueue. 1641 */ 1642 taskqueue_enqueue(taskqueue_thread, &ic->ic_restart_task); 1643 } 1644 1645 void 1646 ieee80211_beacon_miss(struct ieee80211com *ic) 1647 { 1648 IEEE80211_LOCK(ic); 1649 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 1650 /* Process in a taskq, the handler may reenter the driver */ 1651 ieee80211_runtask(ic, &ic->ic_bmiss_task); 1652 } 1653 IEEE80211_UNLOCK(ic); 1654 } 1655 1656 static void 1657 beacon_miss(void *arg, int npending) 1658 { 1659 struct ieee80211com *ic = arg; 1660 struct ieee80211vap *vap; 1661 1662 IEEE80211_LOCK(ic); 1663 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1664 /* 1665 * We only pass events through for sta vap's in RUN+ state; 1666 * may be too restrictive but for now this saves all the 1667 * handlers duplicating these checks. 1668 */ 1669 if (vap->iv_opmode == IEEE80211_M_STA && 1670 vap->iv_state >= IEEE80211_S_RUN && 1671 vap->iv_bmiss != NULL) 1672 vap->iv_bmiss(vap); 1673 } 1674 IEEE80211_UNLOCK(ic); 1675 } 1676 1677 static void 1678 beacon_swmiss(void *arg, int npending) 1679 { 1680 struct ieee80211vap *vap = arg; 1681 struct ieee80211com *ic = vap->iv_ic; 1682 1683 IEEE80211_LOCK(ic); 1684 if (vap->iv_state >= IEEE80211_S_RUN) { 1685 /* XXX Call multiple times if npending > zero? */ 1686 vap->iv_bmiss(vap); 1687 } 1688 IEEE80211_UNLOCK(ic); 1689 } 1690 1691 /* 1692 * Software beacon miss handling. Check if any beacons 1693 * were received in the last period. If not post a 1694 * beacon miss; otherwise reset the counter. 1695 */ 1696 void 1697 ieee80211_swbmiss(void *arg) 1698 { 1699 struct ieee80211vap *vap = arg; 1700 struct ieee80211com *ic = vap->iv_ic; 1701 1702 IEEE80211_LOCK_ASSERT(ic); 1703 1704 KASSERT(vap->iv_state >= IEEE80211_S_RUN, 1705 ("wrong state %d", vap->iv_state)); 1706 1707 if (ic->ic_flags & IEEE80211_F_SCAN) { 1708 /* 1709 * If scanning just ignore and reset state. If we get a 1710 * bmiss after coming out of scan because we haven't had 1711 * time to receive a beacon then we should probe the AP 1712 * before posting a real bmiss (unless iv_bmiss_max has 1713 * been artifiically lowered). A cleaner solution might 1714 * be to disable the timer on scan start/end but to handle 1715 * case of multiple sta vap's we'd need to disable the 1716 * timers of all affected vap's. 1717 */ 1718 vap->iv_swbmiss_count = 0; 1719 } else if (vap->iv_swbmiss_count == 0) { 1720 if (vap->iv_bmiss != NULL) 1721 ieee80211_runtask(ic, &vap->iv_swbmiss_task); 1722 } else 1723 vap->iv_swbmiss_count = 0; 1724 callout_reset(&vap->iv_swbmiss, vap->iv_swbmiss_period, 1725 ieee80211_swbmiss, vap); 1726 } 1727 1728 /* 1729 * Start an 802.11h channel switch. We record the parameters, 1730 * mark the operation pending, notify each vap through the 1731 * beacon update mechanism so it can update the beacon frame 1732 * contents, and then switch vap's to CSA state to block outbound 1733 * traffic. Devices that handle CSA directly can use the state 1734 * switch to do the right thing so long as they call 1735 * ieee80211_csa_completeswitch when it's time to complete the 1736 * channel change. Devices that depend on the net80211 layer can 1737 * use ieee80211_beacon_update to handle the countdown and the 1738 * channel switch. 1739 */ 1740 void 1741 ieee80211_csa_startswitch(struct ieee80211com *ic, 1742 struct ieee80211_channel *c, int mode, int count) 1743 { 1744 struct ieee80211vap *vap; 1745 1746 IEEE80211_LOCK_ASSERT(ic); 1747 1748 ic->ic_csa_newchan = c; 1749 ic->ic_csa_mode = mode; 1750 ic->ic_csa_count = count; 1751 ic->ic_flags |= IEEE80211_F_CSAPENDING; 1752 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1753 if (vap->iv_opmode == IEEE80211_M_HOSTAP || 1754 vap->iv_opmode == IEEE80211_M_IBSS || 1755 vap->iv_opmode == IEEE80211_M_MBSS) 1756 ieee80211_beacon_notify(vap, IEEE80211_BEACON_CSA); 1757 /* switch to CSA state to block outbound traffic */ 1758 if (vap->iv_state == IEEE80211_S_RUN) 1759 ieee80211_new_state_locked(vap, IEEE80211_S_CSA, 0); 1760 } 1761 ieee80211_notify_csa(ic, c, mode, count); 1762 } 1763 1764 /* 1765 * Complete the channel switch by transitioning all CSA VAPs to RUN. 1766 * This is called by both the completion and cancellation functions 1767 * so each VAP is placed back in the RUN state and can thus transmit. 1768 */ 1769 static void 1770 csa_completeswitch(struct ieee80211com *ic) 1771 { 1772 struct ieee80211vap *vap; 1773 1774 ic->ic_csa_newchan = NULL; 1775 ic->ic_flags &= ~IEEE80211_F_CSAPENDING; 1776 1777 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1778 if (vap->iv_state == IEEE80211_S_CSA) 1779 ieee80211_new_state_locked(vap, IEEE80211_S_RUN, 0); 1780 } 1781 1782 /* 1783 * Complete an 802.11h channel switch started by ieee80211_csa_startswitch. 1784 * We clear state and move all vap's in CSA state to RUN state 1785 * so they can again transmit. 1786 * 1787 * Although this may not be completely correct, update the BSS channel 1788 * for each VAP to the newly configured channel. The setcurchan sets 1789 * the current operating channel for the interface (so the radio does 1790 * switch over) but the VAP BSS isn't updated, leading to incorrectly 1791 * reported information via ioctl. 1792 */ 1793 void 1794 ieee80211_csa_completeswitch(struct ieee80211com *ic) 1795 { 1796 struct ieee80211vap *vap; 1797 1798 IEEE80211_LOCK_ASSERT(ic); 1799 1800 KASSERT(ic->ic_flags & IEEE80211_F_CSAPENDING, ("csa not pending")); 1801 1802 ieee80211_setcurchan(ic, ic->ic_csa_newchan); 1803 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1804 if (vap->iv_state == IEEE80211_S_CSA) 1805 vap->iv_bss->ni_chan = ic->ic_curchan; 1806 1807 csa_completeswitch(ic); 1808 } 1809 1810 /* 1811 * Cancel an 802.11h channel switch started by ieee80211_csa_startswitch. 1812 * We clear state and move all vap's in CSA state to RUN state 1813 * so they can again transmit. 1814 */ 1815 void 1816 ieee80211_csa_cancelswitch(struct ieee80211com *ic) 1817 { 1818 IEEE80211_LOCK_ASSERT(ic); 1819 1820 csa_completeswitch(ic); 1821 } 1822 1823 /* 1824 * Complete a DFS CAC started by ieee80211_dfs_cac_start. 1825 * We clear state and move all vap's in CAC state to RUN state. 1826 */ 1827 void 1828 ieee80211_cac_completeswitch(struct ieee80211vap *vap0) 1829 { 1830 struct ieee80211com *ic = vap0->iv_ic; 1831 struct ieee80211vap *vap; 1832 1833 IEEE80211_LOCK(ic); 1834 /* 1835 * Complete CAC state change for lead vap first; then 1836 * clock all the other vap's waiting. 1837 */ 1838 KASSERT(vap0->iv_state == IEEE80211_S_CAC, 1839 ("wrong state %d", vap0->iv_state)); 1840 ieee80211_new_state_locked(vap0, IEEE80211_S_RUN, 0); 1841 1842 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1843 if (vap->iv_state == IEEE80211_S_CAC) 1844 ieee80211_new_state_locked(vap, IEEE80211_S_RUN, 0); 1845 IEEE80211_UNLOCK(ic); 1846 } 1847 1848 /* 1849 * Force all vap's other than the specified vap to the INIT state 1850 * and mark them as waiting for a scan to complete. These vaps 1851 * will be brought up when the scan completes and the scanning vap 1852 * reaches RUN state by wakeupwaiting. 1853 */ 1854 static void 1855 markwaiting(struct ieee80211vap *vap0) 1856 { 1857 struct ieee80211com *ic = vap0->iv_ic; 1858 struct ieee80211vap *vap; 1859 1860 IEEE80211_LOCK_ASSERT(ic); 1861 1862 /* 1863 * A vap list entry can not disappear since we are running on the 1864 * taskqueue and a vap destroy will queue and drain another state 1865 * change task. 1866 */ 1867 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1868 if (vap == vap0) 1869 continue; 1870 if (vap->iv_state != IEEE80211_S_INIT) { 1871 /* NB: iv_newstate may drop the lock */ 1872 vap->iv_newstate(vap, IEEE80211_S_INIT, 0); 1873 IEEE80211_LOCK_ASSERT(ic); 1874 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT; 1875 } 1876 } 1877 } 1878 1879 /* 1880 * Wakeup all vap's waiting for a scan to complete. This is the 1881 * companion to markwaiting (above) and is used to coordinate 1882 * multiple vaps scanning. 1883 * This is called from the state taskqueue. 1884 */ 1885 static void 1886 wakeupwaiting(struct ieee80211vap *vap0) 1887 { 1888 struct ieee80211com *ic = vap0->iv_ic; 1889 struct ieee80211vap *vap; 1890 1891 IEEE80211_LOCK_ASSERT(ic); 1892 1893 /* 1894 * A vap list entry can not disappear since we are running on the 1895 * taskqueue and a vap destroy will queue and drain another state 1896 * change task. 1897 */ 1898 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1899 if (vap == vap0) 1900 continue; 1901 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANWAIT) { 1902 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANWAIT; 1903 /* NB: sta's cannot go INIT->RUN */ 1904 /* NB: iv_newstate may drop the lock */ 1905 vap->iv_newstate(vap, 1906 vap->iv_opmode == IEEE80211_M_STA ? 1907 IEEE80211_S_SCAN : IEEE80211_S_RUN, 0); 1908 IEEE80211_LOCK_ASSERT(ic); 1909 } 1910 } 1911 } 1912 1913 /* 1914 * Handle post state change work common to all operating modes. 1915 */ 1916 static void 1917 ieee80211_newstate_cb(void *xvap, int npending) 1918 { 1919 struct ieee80211vap *vap = xvap; 1920 struct ieee80211com *ic = vap->iv_ic; 1921 enum ieee80211_state nstate, ostate; 1922 int arg, rc; 1923 1924 IEEE80211_LOCK(ic); 1925 nstate = vap->iv_nstate; 1926 arg = vap->iv_nstate_arg; 1927 1928 if (vap->iv_flags_ext & IEEE80211_FEXT_REINIT) { 1929 /* 1930 * We have been requested to drop back to the INIT before 1931 * proceeding to the new state. 1932 */ 1933 /* Deny any state changes while we are here. */ 1934 vap->iv_nstate = IEEE80211_S_INIT; 1935 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1936 "%s: %s -> %s arg %d\n", __func__, 1937 ieee80211_state_name[vap->iv_state], 1938 ieee80211_state_name[vap->iv_nstate], arg); 1939 vap->iv_newstate(vap, vap->iv_nstate, 0); 1940 IEEE80211_LOCK_ASSERT(ic); 1941 vap->iv_flags_ext &= ~(IEEE80211_FEXT_REINIT | 1942 IEEE80211_FEXT_STATEWAIT); 1943 /* enqueue new state transition after cancel_scan() task */ 1944 ieee80211_new_state_locked(vap, nstate, arg); 1945 goto done; 1946 } 1947 1948 ostate = vap->iv_state; 1949 if (nstate == IEEE80211_S_SCAN && ostate != IEEE80211_S_INIT) { 1950 /* 1951 * SCAN was forced; e.g. on beacon miss. Force other running 1952 * vap's to INIT state and mark them as waiting for the scan to 1953 * complete. This insures they don't interfere with our 1954 * scanning. Since we are single threaded the vaps can not 1955 * transition again while we are executing. 1956 * 1957 * XXX not always right, assumes ap follows sta 1958 */ 1959 markwaiting(vap); 1960 } 1961 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1962 "%s: %s -> %s arg %d\n", __func__, 1963 ieee80211_state_name[ostate], ieee80211_state_name[nstate], arg); 1964 1965 rc = vap->iv_newstate(vap, nstate, arg); 1966 IEEE80211_LOCK_ASSERT(ic); 1967 vap->iv_flags_ext &= ~IEEE80211_FEXT_STATEWAIT; 1968 if (rc != 0) { 1969 /* State transition failed */ 1970 KASSERT(rc != EINPROGRESS, ("iv_newstate was deferred")); 1971 KASSERT(nstate != IEEE80211_S_INIT, 1972 ("INIT state change failed")); 1973 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1974 "%s: %s returned error %d\n", __func__, 1975 ieee80211_state_name[nstate], rc); 1976 goto done; 1977 } 1978 1979 /* No actual transition, skip post processing */ 1980 if (ostate == nstate) 1981 goto done; 1982 1983 if (nstate == IEEE80211_S_RUN) { 1984 /* 1985 * OACTIVE may be set on the vap if the upper layer 1986 * tried to transmit (e.g. IPv6 NDP) before we reach 1987 * RUN state. Clear it and restart xmit. 1988 * 1989 * Note this can also happen as a result of SLEEP->RUN 1990 * (i.e. coming out of power save mode). 1991 */ 1992 vap->iv_ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 1993 1994 /* 1995 * XXX TODO Kick-start a VAP queue - this should be a method! 1996 */ 1997 1998 /* bring up any vaps waiting on us */ 1999 wakeupwaiting(vap); 2000 } else if (nstate == IEEE80211_S_INIT) { 2001 /* 2002 * Flush the scan cache if we did the last scan (XXX?) 2003 * and flush any frames on send queues from this vap. 2004 * Note the mgt q is used only for legacy drivers and 2005 * will go away shortly. 2006 */ 2007 ieee80211_scan_flush(vap); 2008 2009 /* 2010 * XXX TODO: ic/vap queue flush 2011 */ 2012 } 2013 done: 2014 IEEE80211_UNLOCK(ic); 2015 } 2016 2017 /* 2018 * Public interface for initiating a state machine change. 2019 * This routine single-threads the request and coordinates 2020 * the scheduling of multiple vaps for the purpose of selecting 2021 * an operating channel. Specifically the following scenarios 2022 * are handled: 2023 * o only one vap can be selecting a channel so on transition to 2024 * SCAN state if another vap is already scanning then 2025 * mark the caller for later processing and return without 2026 * doing anything (XXX? expectations by caller of synchronous operation) 2027 * o only one vap can be doing CAC of a channel so on transition to 2028 * CAC state if another vap is already scanning for radar then 2029 * mark the caller for later processing and return without 2030 * doing anything (XXX? expectations by caller of synchronous operation) 2031 * o if another vap is already running when a request is made 2032 * to SCAN then an operating channel has been chosen; bypass 2033 * the scan and just join the channel 2034 * 2035 * Note that the state change call is done through the iv_newstate 2036 * method pointer so any driver routine gets invoked. The driver 2037 * will normally call back into operating mode-specific 2038 * ieee80211_newstate routines (below) unless it needs to completely 2039 * bypass the state machine (e.g. because the firmware has it's 2040 * own idea how things should work). Bypassing the net80211 layer 2041 * is usually a mistake and indicates lack of proper integration 2042 * with the net80211 layer. 2043 */ 2044 int 2045 ieee80211_new_state_locked(struct ieee80211vap *vap, 2046 enum ieee80211_state nstate, int arg) 2047 { 2048 struct ieee80211com *ic = vap->iv_ic; 2049 struct ieee80211vap *vp; 2050 enum ieee80211_state ostate; 2051 int nrunning, nscanning; 2052 2053 IEEE80211_LOCK_ASSERT(ic); 2054 2055 if (vap->iv_flags_ext & IEEE80211_FEXT_STATEWAIT) { 2056 if (vap->iv_nstate == IEEE80211_S_INIT || 2057 ((vap->iv_state == IEEE80211_S_INIT || 2058 (vap->iv_flags_ext & IEEE80211_FEXT_REINIT)) && 2059 vap->iv_nstate == IEEE80211_S_SCAN && 2060 nstate > IEEE80211_S_SCAN)) { 2061 /* 2062 * XXX The vap is being stopped/started, 2063 * do not allow any other state changes 2064 * until this is completed. 2065 */ 2066 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 2067 "%s: %s -> %s (%s) transition discarded\n", 2068 __func__, 2069 ieee80211_state_name[vap->iv_state], 2070 ieee80211_state_name[nstate], 2071 ieee80211_state_name[vap->iv_nstate]); 2072 return -1; 2073 } else if (vap->iv_state != vap->iv_nstate) { 2074 #if 0 2075 /* Warn if the previous state hasn't completed. */ 2076 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 2077 "%s: pending %s -> %s transition lost\n", __func__, 2078 ieee80211_state_name[vap->iv_state], 2079 ieee80211_state_name[vap->iv_nstate]); 2080 #else 2081 /* XXX temporarily enable to identify issues */ 2082 if_printf(vap->iv_ifp, 2083 "%s: pending %s -> %s transition lost\n", 2084 __func__, ieee80211_state_name[vap->iv_state], 2085 ieee80211_state_name[vap->iv_nstate]); 2086 #endif 2087 } 2088 } 2089 2090 nrunning = nscanning = 0; 2091 /* XXX can track this state instead of calculating */ 2092 TAILQ_FOREACH(vp, &ic->ic_vaps, iv_next) { 2093 if (vp != vap) { 2094 if (vp->iv_state >= IEEE80211_S_RUN) 2095 nrunning++; 2096 /* XXX doesn't handle bg scan */ 2097 /* NB: CAC+AUTH+ASSOC treated like SCAN */ 2098 else if (vp->iv_state > IEEE80211_S_INIT) 2099 nscanning++; 2100 } 2101 } 2102 ostate = vap->iv_state; 2103 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 2104 "%s: %s -> %s (nrunning %d nscanning %d)\n", __func__, 2105 ieee80211_state_name[ostate], ieee80211_state_name[nstate], 2106 nrunning, nscanning); 2107 switch (nstate) { 2108 case IEEE80211_S_SCAN: 2109 if (ostate == IEEE80211_S_INIT) { 2110 /* 2111 * INIT -> SCAN happens on initial bringup. 2112 */ 2113 KASSERT(!(nscanning && nrunning), 2114 ("%d scanning and %d running", nscanning, nrunning)); 2115 if (nscanning) { 2116 /* 2117 * Someone is scanning, defer our state 2118 * change until the work has completed. 2119 */ 2120 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 2121 "%s: defer %s -> %s\n", 2122 __func__, ieee80211_state_name[ostate], 2123 ieee80211_state_name[nstate]); 2124 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT; 2125 return 0; 2126 } 2127 if (nrunning) { 2128 /* 2129 * Someone is operating; just join the channel 2130 * they have chosen. 2131 */ 2132 /* XXX kill arg? */ 2133 /* XXX check each opmode, adhoc? */ 2134 if (vap->iv_opmode == IEEE80211_M_STA) 2135 nstate = IEEE80211_S_SCAN; 2136 else 2137 nstate = IEEE80211_S_RUN; 2138 #ifdef IEEE80211_DEBUG 2139 if (nstate != IEEE80211_S_SCAN) { 2140 IEEE80211_DPRINTF(vap, 2141 IEEE80211_MSG_STATE, 2142 "%s: override, now %s -> %s\n", 2143 __func__, 2144 ieee80211_state_name[ostate], 2145 ieee80211_state_name[nstate]); 2146 } 2147 #endif 2148 } 2149 } 2150 break; 2151 case IEEE80211_S_RUN: 2152 if (vap->iv_opmode == IEEE80211_M_WDS && 2153 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) && 2154 nscanning) { 2155 /* 2156 * Legacy WDS with someone else scanning; don't 2157 * go online until that completes as we should 2158 * follow the other vap to the channel they choose. 2159 */ 2160 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 2161 "%s: defer %s -> %s (legacy WDS)\n", __func__, 2162 ieee80211_state_name[ostate], 2163 ieee80211_state_name[nstate]); 2164 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT; 2165 return 0; 2166 } 2167 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 2168 IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) && 2169 (vap->iv_flags_ext & IEEE80211_FEXT_DFS) && 2170 !IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) { 2171 /* 2172 * This is a DFS channel, transition to CAC state 2173 * instead of RUN. This allows us to initiate 2174 * Channel Availability Check (CAC) as specified 2175 * by 11h/DFS. 2176 */ 2177 nstate = IEEE80211_S_CAC; 2178 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 2179 "%s: override %s -> %s (DFS)\n", __func__, 2180 ieee80211_state_name[ostate], 2181 ieee80211_state_name[nstate]); 2182 } 2183 break; 2184 case IEEE80211_S_INIT: 2185 /* cancel any scan in progress */ 2186 ieee80211_cancel_scan(vap); 2187 if (ostate == IEEE80211_S_INIT ) { 2188 /* XXX don't believe this */ 2189 /* INIT -> INIT. nothing to do */ 2190 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANWAIT; 2191 } 2192 /* fall thru... */ 2193 default: 2194 break; 2195 } 2196 /* defer the state change to a thread */ 2197 vap->iv_nstate = nstate; 2198 vap->iv_nstate_arg = arg; 2199 vap->iv_flags_ext |= IEEE80211_FEXT_STATEWAIT; 2200 ieee80211_runtask(ic, &vap->iv_nstate_task); 2201 return EINPROGRESS; 2202 } 2203 2204 int 2205 ieee80211_new_state(struct ieee80211vap *vap, 2206 enum ieee80211_state nstate, int arg) 2207 { 2208 struct ieee80211com *ic = vap->iv_ic; 2209 int rc; 2210 2211 IEEE80211_LOCK(ic); 2212 rc = ieee80211_new_state_locked(vap, nstate, arg); 2213 IEEE80211_UNLOCK(ic); 2214 return rc; 2215 } 2216