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: stable/11/sys/net80211/ieee80211_proto.c 344225 2019-02-17 03:21:42Z avos $"); 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 66const 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}; 72const 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}; 78const 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}; 87const 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}; 97const 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 */ 110const char * 111ieee80211_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 237static void beacon_miss(void *, int); 238static void beacon_swmiss(void *, int); 239static void parent_updown(void *, int); 240static void update_mcast(void *, int); 241static void update_promisc(void *, int); 242static void update_channel(void *, int); 243static void update_chw(void *, int); 244static void update_wme(void *, int); 245static void restart_vaps(void *, int); 246static void ieee80211_newstate_cb(void *, int); 247 248static int 249null_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 258void 259ieee80211_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 303void 304ieee80211_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 316static void 317null_update_beacon(struct ieee80211vap *vap, int item) 318{ 319} 320 321void 322ieee80211_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 if (isclr(ic->ic_modecaps, i)) 349 continue; 350 351 const struct ieee80211_rateset *rs = &ic->ic_sup_rates[i]; 352 353 vap->iv_txparms[i].ucastrate = IEEE80211_FIXED_RATE_NONE; 354 355 /* 356 * Setting the management rate to MCS 0 assumes that the 357 * BSS Basic rate set is empty and the BSS Basic MCS set 358 * is not. 359 * 360 * Since we're not checking this, default to the lowest 361 * defined rate for this mode. 362 * 363 * At least one 11n AP (DLINK DIR-825) is reported to drop 364 * some MCS management traffic (eg BA response frames.) 365 * 366 * See also: 9.6.0 of the 802.11n-2009 specification. 367 */ 368#ifdef NOTYET 369 if (i == IEEE80211_MODE_11NA || i == IEEE80211_MODE_11NG) { 370 vap->iv_txparms[i].mgmtrate = 0 | IEEE80211_RATE_MCS; 371 vap->iv_txparms[i].mcastrate = 0 | IEEE80211_RATE_MCS; 372 } else { 373 vap->iv_txparms[i].mgmtrate = 374 rs->rs_rates[0] & IEEE80211_RATE_VAL; 375 vap->iv_txparms[i].mcastrate = 376 rs->rs_rates[0] & IEEE80211_RATE_VAL; 377 } 378#endif 379 vap->iv_txparms[i].mgmtrate = rs->rs_rates[0] & IEEE80211_RATE_VAL; 380 vap->iv_txparms[i].mcastrate = rs->rs_rates[0] & IEEE80211_RATE_VAL; 381 vap->iv_txparms[i].maxretry = IEEE80211_TXMAX_DEFAULT; 382 } 383 vap->iv_roaming = IEEE80211_ROAMING_AUTO; 384 385 vap->iv_update_beacon = null_update_beacon; 386 vap->iv_deliver_data = ieee80211_deliver_data; 387 388 /* attach support for operating mode */ 389 ic->ic_vattach[vap->iv_opmode](vap); 390} 391 392void 393ieee80211_proto_vdetach(struct ieee80211vap *vap) 394{ 395#define FREEAPPIE(ie) do { \ 396 if (ie != NULL) \ 397 IEEE80211_FREE(ie, M_80211_NODE_IE); \ 398} while (0) 399 /* 400 * Detach operating mode module. 401 */ 402 if (vap->iv_opdetach != NULL) 403 vap->iv_opdetach(vap); 404 /* 405 * This should not be needed as we detach when reseting 406 * the state but be conservative here since the 407 * authenticator may do things like spawn kernel threads. 408 */ 409 if (vap->iv_auth->ia_detach != NULL) 410 vap->iv_auth->ia_detach(vap); 411 /* 412 * Detach any ACL'ator. 413 */ 414 if (vap->iv_acl != NULL) 415 vap->iv_acl->iac_detach(vap); 416 417 FREEAPPIE(vap->iv_appie_beacon); 418 FREEAPPIE(vap->iv_appie_probereq); 419 FREEAPPIE(vap->iv_appie_proberesp); 420 FREEAPPIE(vap->iv_appie_assocreq); 421 FREEAPPIE(vap->iv_appie_assocresp); 422 FREEAPPIE(vap->iv_appie_wpa); 423#undef FREEAPPIE 424} 425 426/* 427 * Simple-minded authenticator module support. 428 */ 429 430#define IEEE80211_AUTH_MAX (IEEE80211_AUTH_WPA+1) 431/* XXX well-known names */ 432static const char *auth_modnames[IEEE80211_AUTH_MAX] = { 433 "wlan_internal", /* IEEE80211_AUTH_NONE */ 434 "wlan_internal", /* IEEE80211_AUTH_OPEN */ 435 "wlan_internal", /* IEEE80211_AUTH_SHARED */ 436 "wlan_xauth", /* IEEE80211_AUTH_8021X */ 437 "wlan_internal", /* IEEE80211_AUTH_AUTO */ 438 "wlan_xauth", /* IEEE80211_AUTH_WPA */ 439}; 440static const struct ieee80211_authenticator *authenticators[IEEE80211_AUTH_MAX]; 441 442static const struct ieee80211_authenticator auth_internal = { 443 .ia_name = "wlan_internal", 444 .ia_attach = NULL, 445 .ia_detach = NULL, 446 .ia_node_join = NULL, 447 .ia_node_leave = NULL, 448}; 449 450/* 451 * Setup internal authenticators once; they are never unregistered. 452 */ 453static void 454ieee80211_auth_setup(void) 455{ 456 ieee80211_authenticator_register(IEEE80211_AUTH_OPEN, &auth_internal); 457 ieee80211_authenticator_register(IEEE80211_AUTH_SHARED, &auth_internal); 458 ieee80211_authenticator_register(IEEE80211_AUTH_AUTO, &auth_internal); 459} 460SYSINIT(wlan_auth, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_auth_setup, NULL); 461 462const struct ieee80211_authenticator * 463ieee80211_authenticator_get(int auth) 464{ 465 if (auth >= IEEE80211_AUTH_MAX) 466 return NULL; 467 if (authenticators[auth] == NULL) 468 ieee80211_load_module(auth_modnames[auth]); 469 return authenticators[auth]; 470} 471 472void 473ieee80211_authenticator_register(int type, 474 const struct ieee80211_authenticator *auth) 475{ 476 if (type >= IEEE80211_AUTH_MAX) 477 return; 478 authenticators[type] = auth; 479} 480 481void 482ieee80211_authenticator_unregister(int type) 483{ 484 485 if (type >= IEEE80211_AUTH_MAX) 486 return; 487 authenticators[type] = NULL; 488} 489 490/* 491 * Very simple-minded ACL module support. 492 */ 493/* XXX just one for now */ 494static const struct ieee80211_aclator *acl = NULL; 495 496void 497ieee80211_aclator_register(const struct ieee80211_aclator *iac) 498{ 499 printf("wlan: %s acl policy registered\n", iac->iac_name); 500 acl = iac; 501} 502 503void 504ieee80211_aclator_unregister(const struct ieee80211_aclator *iac) 505{ 506 if (acl == iac) 507 acl = NULL; 508 printf("wlan: %s acl policy unregistered\n", iac->iac_name); 509} 510 511const struct ieee80211_aclator * 512ieee80211_aclator_get(const char *name) 513{ 514 if (acl == NULL) 515 ieee80211_load_module("wlan_acl"); 516 return acl != NULL && strcmp(acl->iac_name, name) == 0 ? acl : NULL; 517} 518 519void 520ieee80211_print_essid(const uint8_t *essid, int len) 521{ 522 const uint8_t *p; 523 int i; 524 525 if (len > IEEE80211_NWID_LEN) 526 len = IEEE80211_NWID_LEN; 527 /* determine printable or not */ 528 for (i = 0, p = essid; i < len; i++, p++) { 529 if (*p < ' ' || *p > 0x7e) 530 break; 531 } 532 if (i == len) { 533 printf("\""); 534 for (i = 0, p = essid; i < len; i++, p++) 535 printf("%c", *p); 536 printf("\""); 537 } else { 538 printf("0x"); 539 for (i = 0, p = essid; i < len; i++, p++) 540 printf("%02x", *p); 541 } 542} 543 544void 545ieee80211_dump_pkt(struct ieee80211com *ic, 546 const uint8_t *buf, int len, int rate, int rssi) 547{ 548 const struct ieee80211_frame *wh; 549 int i; 550 551 wh = (const struct ieee80211_frame *)buf; 552 switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) { 553 case IEEE80211_FC1_DIR_NODS: 554 printf("NODS %s", ether_sprintf(wh->i_addr2)); 555 printf("->%s", ether_sprintf(wh->i_addr1)); 556 printf("(%s)", ether_sprintf(wh->i_addr3)); 557 break; 558 case IEEE80211_FC1_DIR_TODS: 559 printf("TODS %s", ether_sprintf(wh->i_addr2)); 560 printf("->%s", ether_sprintf(wh->i_addr3)); 561 printf("(%s)", ether_sprintf(wh->i_addr1)); 562 break; 563 case IEEE80211_FC1_DIR_FROMDS: 564 printf("FRDS %s", ether_sprintf(wh->i_addr3)); 565 printf("->%s", ether_sprintf(wh->i_addr1)); 566 printf("(%s)", ether_sprintf(wh->i_addr2)); 567 break; 568 case IEEE80211_FC1_DIR_DSTODS: 569 printf("DSDS %s", ether_sprintf((const uint8_t *)&wh[1])); 570 printf("->%s", ether_sprintf(wh->i_addr3)); 571 printf("(%s", ether_sprintf(wh->i_addr2)); 572 printf("->%s)", ether_sprintf(wh->i_addr1)); 573 break; 574 } 575 switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) { 576 case IEEE80211_FC0_TYPE_DATA: 577 printf(" data"); 578 break; 579 case IEEE80211_FC0_TYPE_MGT: 580 printf(" %s", ieee80211_mgt_subtype_name(wh->i_fc[0])); 581 break; 582 default: 583 printf(" type#%d", wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK); 584 break; 585 } 586 if (IEEE80211_QOS_HAS_SEQ(wh)) { 587 const struct ieee80211_qosframe *qwh = 588 (const struct ieee80211_qosframe *)buf; 589 printf(" QoS [TID %u%s]", qwh->i_qos[0] & IEEE80211_QOS_TID, 590 qwh->i_qos[0] & IEEE80211_QOS_ACKPOLICY ? " ACM" : ""); 591 } 592 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 593 int off; 594 595 off = ieee80211_anyhdrspace(ic, wh); 596 printf(" WEP [IV %.02x %.02x %.02x", 597 buf[off+0], buf[off+1], buf[off+2]); 598 if (buf[off+IEEE80211_WEP_IVLEN] & IEEE80211_WEP_EXTIV) 599 printf(" %.02x %.02x %.02x", 600 buf[off+4], buf[off+5], buf[off+6]); 601 printf(" KID %u]", buf[off+IEEE80211_WEP_IVLEN] >> 6); 602 } 603 if (rate >= 0) 604 printf(" %dM", rate / 2); 605 if (rssi >= 0) 606 printf(" +%d", rssi); 607 printf("\n"); 608 if (len > 0) { 609 for (i = 0; i < len; i++) { 610 if ((i & 1) == 0) 611 printf(" "); 612 printf("%02x", buf[i]); 613 } 614 printf("\n"); 615 } 616} 617 618static __inline int 619findrix(const struct ieee80211_rateset *rs, int r) 620{ 621 int i; 622 623 for (i = 0; i < rs->rs_nrates; i++) 624 if ((rs->rs_rates[i] & IEEE80211_RATE_VAL) == r) 625 return i; 626 return -1; 627} 628 629int 630ieee80211_fix_rate(struct ieee80211_node *ni, 631 struct ieee80211_rateset *nrs, int flags) 632{ 633 struct ieee80211vap *vap = ni->ni_vap; 634 struct ieee80211com *ic = ni->ni_ic; 635 int i, j, rix, error; 636 int okrate, badrate, fixedrate, ucastrate; 637 const struct ieee80211_rateset *srs; 638 uint8_t r; 639 640 error = 0; 641 okrate = badrate = 0; 642 ucastrate = vap->iv_txparms[ieee80211_chan2mode(ni->ni_chan)].ucastrate; 643 if (ucastrate != IEEE80211_FIXED_RATE_NONE) { 644 /* 645 * Workaround awkwardness with fixed rate. We are called 646 * to check both the legacy rate set and the HT rate set 647 * but we must apply any legacy fixed rate check only to the 648 * legacy rate set and vice versa. We cannot tell what type 649 * of rate set we've been given (legacy or HT) but we can 650 * distinguish the fixed rate type (MCS have 0x80 set). 651 * So to deal with this the caller communicates whether to 652 * check MCS or legacy rate using the flags and we use the 653 * type of any fixed rate to avoid applying an MCS to a 654 * legacy rate and vice versa. 655 */ 656 if (ucastrate & 0x80) { 657 if (flags & IEEE80211_F_DOFRATE) 658 flags &= ~IEEE80211_F_DOFRATE; 659 } else if ((ucastrate & 0x80) == 0) { 660 if (flags & IEEE80211_F_DOFMCS) 661 flags &= ~IEEE80211_F_DOFMCS; 662 } 663 /* NB: required to make MCS match below work */ 664 ucastrate &= IEEE80211_RATE_VAL; 665 } 666 fixedrate = IEEE80211_FIXED_RATE_NONE; 667 /* 668 * XXX we are called to process both MCS and legacy rates; 669 * we must use the appropriate basic rate set or chaos will 670 * ensue; for now callers that want MCS must supply 671 * IEEE80211_F_DOBRS; at some point we'll need to split this 672 * function so there are two variants, one for MCS and one 673 * for legacy rates. 674 */ 675 if (flags & IEEE80211_F_DOBRS) 676 srs = (const struct ieee80211_rateset *) 677 ieee80211_get_suphtrates(ic, ni->ni_chan); 678 else 679 srs = ieee80211_get_suprates(ic, ni->ni_chan); 680 for (i = 0; i < nrs->rs_nrates; ) { 681 if (flags & IEEE80211_F_DOSORT) { 682 /* 683 * Sort rates. 684 */ 685 for (j = i + 1; j < nrs->rs_nrates; j++) { 686 if (IEEE80211_RV(nrs->rs_rates[i]) > 687 IEEE80211_RV(nrs->rs_rates[j])) { 688 r = nrs->rs_rates[i]; 689 nrs->rs_rates[i] = nrs->rs_rates[j]; 690 nrs->rs_rates[j] = r; 691 } 692 } 693 } 694 r = nrs->rs_rates[i] & IEEE80211_RATE_VAL; 695 badrate = r; 696 /* 697 * Check for fixed rate. 698 */ 699 if (r == ucastrate) 700 fixedrate = r; 701 /* 702 * Check against supported rates. 703 */ 704 rix = findrix(srs, r); 705 if (flags & IEEE80211_F_DONEGO) { 706 if (rix < 0) { 707 /* 708 * A rate in the node's rate set is not 709 * supported. If this is a basic rate and we 710 * are operating as a STA then this is an error. 711 * Otherwise we just discard/ignore the rate. 712 */ 713 if ((flags & IEEE80211_F_JOIN) && 714 (nrs->rs_rates[i] & IEEE80211_RATE_BASIC)) 715 error++; 716 } else if ((flags & IEEE80211_F_JOIN) == 0) { 717 /* 718 * Overwrite with the supported rate 719 * value so any basic rate bit is set. 720 */ 721 nrs->rs_rates[i] = srs->rs_rates[rix]; 722 } 723 } 724 if ((flags & IEEE80211_F_DODEL) && rix < 0) { 725 /* 726 * Delete unacceptable rates. 727 */ 728 nrs->rs_nrates--; 729 for (j = i; j < nrs->rs_nrates; j++) 730 nrs->rs_rates[j] = nrs->rs_rates[j + 1]; 731 nrs->rs_rates[j] = 0; 732 continue; 733 } 734 if (rix >= 0) 735 okrate = nrs->rs_rates[i]; 736 i++; 737 } 738 if (okrate == 0 || error != 0 || 739 ((flags & (IEEE80211_F_DOFRATE|IEEE80211_F_DOFMCS)) && 740 fixedrate != ucastrate)) { 741 IEEE80211_NOTE(vap, IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni, 742 "%s: flags 0x%x okrate %d error %d fixedrate 0x%x " 743 "ucastrate %x\n", __func__, fixedrate, ucastrate, flags); 744 return badrate | IEEE80211_RATE_BASIC; 745 } else 746 return IEEE80211_RV(okrate); 747} 748 749/* 750 * Reset 11g-related state. 751 */ 752void 753ieee80211_reset_erp(struct ieee80211com *ic) 754{ 755 ic->ic_flags &= ~IEEE80211_F_USEPROT; 756 ic->ic_nonerpsta = 0; 757 ic->ic_longslotsta = 0; 758 /* 759 * Short slot time is enabled only when operating in 11g 760 * and not in an IBSS. We must also honor whether or not 761 * the driver is capable of doing it. 762 */ 763 ieee80211_set_shortslottime(ic, 764 IEEE80211_IS_CHAN_A(ic->ic_curchan) || 765 IEEE80211_IS_CHAN_HT(ic->ic_curchan) || 766 (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 767 ic->ic_opmode == IEEE80211_M_HOSTAP && 768 (ic->ic_caps & IEEE80211_C_SHSLOT))); 769 /* 770 * Set short preamble and ERP barker-preamble flags. 771 */ 772 if (IEEE80211_IS_CHAN_A(ic->ic_curchan) || 773 (ic->ic_caps & IEEE80211_C_SHPREAMBLE)) { 774 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 775 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 776 } else { 777 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 778 ic->ic_flags |= IEEE80211_F_USEBARKER; 779 } 780} 781 782/* 783 * Set the short slot time state and notify the driver. 784 */ 785void 786ieee80211_set_shortslottime(struct ieee80211com *ic, int onoff) 787{ 788 if (onoff) 789 ic->ic_flags |= IEEE80211_F_SHSLOT; 790 else 791 ic->ic_flags &= ~IEEE80211_F_SHSLOT; 792 /* notify driver */ 793 if (ic->ic_updateslot != NULL) 794 ic->ic_updateslot(ic); 795} 796 797/* 798 * Check if the specified rate set supports ERP. 799 * NB: the rate set is assumed to be sorted. 800 */ 801int 802ieee80211_iserp_rateset(const struct ieee80211_rateset *rs) 803{ 804 static const int rates[] = { 2, 4, 11, 22, 12, 24, 48 }; 805 int i, j; 806 807 if (rs->rs_nrates < nitems(rates)) 808 return 0; 809 for (i = 0; i < nitems(rates); i++) { 810 for (j = 0; j < rs->rs_nrates; j++) { 811 int r = rs->rs_rates[j] & IEEE80211_RATE_VAL; 812 if (rates[i] == r) 813 goto next; 814 if (r > rates[i]) 815 return 0; 816 } 817 return 0; 818 next: 819 ; 820 } 821 return 1; 822} 823 824/* 825 * Mark the basic rates for the rate table based on the 826 * operating mode. For real 11g we mark all the 11b rates 827 * and 6, 12, and 24 OFDM. For 11b compatibility we mark only 828 * 11b rates. There's also a pseudo 11a-mode used to mark only 829 * the basic OFDM rates. 830 */ 831static void 832setbasicrates(struct ieee80211_rateset *rs, 833 enum ieee80211_phymode mode, int add) 834{ 835 static const struct ieee80211_rateset basic[IEEE80211_MODE_MAX] = { 836 [IEEE80211_MODE_11A] = { 3, { 12, 24, 48 } }, 837 [IEEE80211_MODE_11B] = { 2, { 2, 4 } }, 838 /* NB: mixed b/g */ 839 [IEEE80211_MODE_11G] = { 4, { 2, 4, 11, 22 } }, 840 [IEEE80211_MODE_TURBO_A] = { 3, { 12, 24, 48 } }, 841 [IEEE80211_MODE_TURBO_G] = { 4, { 2, 4, 11, 22 } }, 842 [IEEE80211_MODE_STURBO_A] = { 3, { 12, 24, 48 } }, 843 [IEEE80211_MODE_HALF] = { 3, { 6, 12, 24 } }, 844 [IEEE80211_MODE_QUARTER] = { 3, { 3, 6, 12 } }, 845 [IEEE80211_MODE_11NA] = { 3, { 12, 24, 48 } }, 846 /* NB: mixed b/g */ 847 [IEEE80211_MODE_11NG] = { 4, { 2, 4, 11, 22 } }, 848 }; 849 int i, j; 850 851 for (i = 0; i < rs->rs_nrates; i++) { 852 if (!add) 853 rs->rs_rates[i] &= IEEE80211_RATE_VAL; 854 for (j = 0; j < basic[mode].rs_nrates; j++) 855 if (basic[mode].rs_rates[j] == rs->rs_rates[i]) { 856 rs->rs_rates[i] |= IEEE80211_RATE_BASIC; 857 break; 858 } 859 } 860} 861 862/* 863 * Set the basic rates in a rate set. 864 */ 865void 866ieee80211_setbasicrates(struct ieee80211_rateset *rs, 867 enum ieee80211_phymode mode) 868{ 869 setbasicrates(rs, mode, 0); 870} 871 872/* 873 * Add basic rates to a rate set. 874 */ 875void 876ieee80211_addbasicrates(struct ieee80211_rateset *rs, 877 enum ieee80211_phymode mode) 878{ 879 setbasicrates(rs, mode, 1); 880} 881 882/* 883 * WME protocol support. 884 * 885 * The default 11a/b/g/n parameters come from the WiFi Alliance WMM 886 * System Interopability Test Plan (v1.4, Appendix F) and the 802.11n 887 * Draft 2.0 Test Plan (Appendix D). 888 * 889 * Static/Dynamic Turbo mode settings come from Atheros. 890 */ 891typedef struct phyParamType { 892 uint8_t aifsn; 893 uint8_t logcwmin; 894 uint8_t logcwmax; 895 uint16_t txopLimit; 896 uint8_t acm; 897} paramType; 898 899static const struct phyParamType phyParamForAC_BE[IEEE80211_MODE_MAX] = { 900 [IEEE80211_MODE_AUTO] = { 3, 4, 6, 0, 0 }, 901 [IEEE80211_MODE_11A] = { 3, 4, 6, 0, 0 }, 902 [IEEE80211_MODE_11B] = { 3, 4, 6, 0, 0 }, 903 [IEEE80211_MODE_11G] = { 3, 4, 6, 0, 0 }, 904 [IEEE80211_MODE_FH] = { 3, 4, 6, 0, 0 }, 905 [IEEE80211_MODE_TURBO_A]= { 2, 3, 5, 0, 0 }, 906 [IEEE80211_MODE_TURBO_G]= { 2, 3, 5, 0, 0 }, 907 [IEEE80211_MODE_STURBO_A]={ 2, 3, 5, 0, 0 }, 908 [IEEE80211_MODE_HALF] = { 3, 4, 6, 0, 0 }, 909 [IEEE80211_MODE_QUARTER]= { 3, 4, 6, 0, 0 }, 910 [IEEE80211_MODE_11NA] = { 3, 4, 6, 0, 0 }, 911 [IEEE80211_MODE_11NG] = { 3, 4, 6, 0, 0 }, 912}; 913static const struct phyParamType phyParamForAC_BK[IEEE80211_MODE_MAX] = { 914 [IEEE80211_MODE_AUTO] = { 7, 4, 10, 0, 0 }, 915 [IEEE80211_MODE_11A] = { 7, 4, 10, 0, 0 }, 916 [IEEE80211_MODE_11B] = { 7, 4, 10, 0, 0 }, 917 [IEEE80211_MODE_11G] = { 7, 4, 10, 0, 0 }, 918 [IEEE80211_MODE_FH] = { 7, 4, 10, 0, 0 }, 919 [IEEE80211_MODE_TURBO_A]= { 7, 3, 10, 0, 0 }, 920 [IEEE80211_MODE_TURBO_G]= { 7, 3, 10, 0, 0 }, 921 [IEEE80211_MODE_STURBO_A]={ 7, 3, 10, 0, 0 }, 922 [IEEE80211_MODE_HALF] = { 7, 4, 10, 0, 0 }, 923 [IEEE80211_MODE_QUARTER]= { 7, 4, 10, 0, 0 }, 924 [IEEE80211_MODE_11NA] = { 7, 4, 10, 0, 0 }, 925 [IEEE80211_MODE_11NG] = { 7, 4, 10, 0, 0 }, 926}; 927static const struct phyParamType phyParamForAC_VI[IEEE80211_MODE_MAX] = { 928 [IEEE80211_MODE_AUTO] = { 1, 3, 4, 94, 0 }, 929 [IEEE80211_MODE_11A] = { 1, 3, 4, 94, 0 }, 930 [IEEE80211_MODE_11B] = { 1, 3, 4, 188, 0 }, 931 [IEEE80211_MODE_11G] = { 1, 3, 4, 94, 0 }, 932 [IEEE80211_MODE_FH] = { 1, 3, 4, 188, 0 }, 933 [IEEE80211_MODE_TURBO_A]= { 1, 2, 3, 94, 0 }, 934 [IEEE80211_MODE_TURBO_G]= { 1, 2, 3, 94, 0 }, 935 [IEEE80211_MODE_STURBO_A]={ 1, 2, 3, 94, 0 }, 936 [IEEE80211_MODE_HALF] = { 1, 3, 4, 94, 0 }, 937 [IEEE80211_MODE_QUARTER]= { 1, 3, 4, 94, 0 }, 938 [IEEE80211_MODE_11NA] = { 1, 3, 4, 94, 0 }, 939 [IEEE80211_MODE_11NG] = { 1, 3, 4, 94, 0 }, 940}; 941static const struct phyParamType phyParamForAC_VO[IEEE80211_MODE_MAX] = { 942 [IEEE80211_MODE_AUTO] = { 1, 2, 3, 47, 0 }, 943 [IEEE80211_MODE_11A] = { 1, 2, 3, 47, 0 }, 944 [IEEE80211_MODE_11B] = { 1, 2, 3, 102, 0 }, 945 [IEEE80211_MODE_11G] = { 1, 2, 3, 47, 0 }, 946 [IEEE80211_MODE_FH] = { 1, 2, 3, 102, 0 }, 947 [IEEE80211_MODE_TURBO_A]= { 1, 2, 2, 47, 0 }, 948 [IEEE80211_MODE_TURBO_G]= { 1, 2, 2, 47, 0 }, 949 [IEEE80211_MODE_STURBO_A]={ 1, 2, 2, 47, 0 }, 950 [IEEE80211_MODE_HALF] = { 1, 2, 3, 47, 0 }, 951 [IEEE80211_MODE_QUARTER]= { 1, 2, 3, 47, 0 }, 952 [IEEE80211_MODE_11NA] = { 1, 2, 3, 47, 0 }, 953 [IEEE80211_MODE_11NG] = { 1, 2, 3, 47, 0 }, 954}; 955 956static const struct phyParamType bssPhyParamForAC_BE[IEEE80211_MODE_MAX] = { 957 [IEEE80211_MODE_AUTO] = { 3, 4, 10, 0, 0 }, 958 [IEEE80211_MODE_11A] = { 3, 4, 10, 0, 0 }, 959 [IEEE80211_MODE_11B] = { 3, 4, 10, 0, 0 }, 960 [IEEE80211_MODE_11G] = { 3, 4, 10, 0, 0 }, 961 [IEEE80211_MODE_FH] = { 3, 4, 10, 0, 0 }, 962 [IEEE80211_MODE_TURBO_A]= { 2, 3, 10, 0, 0 }, 963 [IEEE80211_MODE_TURBO_G]= { 2, 3, 10, 0, 0 }, 964 [IEEE80211_MODE_STURBO_A]={ 2, 3, 10, 0, 0 }, 965 [IEEE80211_MODE_HALF] = { 3, 4, 10, 0, 0 }, 966 [IEEE80211_MODE_QUARTER]= { 3, 4, 10, 0, 0 }, 967 [IEEE80211_MODE_11NA] = { 3, 4, 10, 0, 0 }, 968 [IEEE80211_MODE_11NG] = { 3, 4, 10, 0, 0 }, 969}; 970static const struct phyParamType bssPhyParamForAC_VI[IEEE80211_MODE_MAX] = { 971 [IEEE80211_MODE_AUTO] = { 2, 3, 4, 94, 0 }, 972 [IEEE80211_MODE_11A] = { 2, 3, 4, 94, 0 }, 973 [IEEE80211_MODE_11B] = { 2, 3, 4, 188, 0 }, 974 [IEEE80211_MODE_11G] = { 2, 3, 4, 94, 0 }, 975 [IEEE80211_MODE_FH] = { 2, 3, 4, 188, 0 }, 976 [IEEE80211_MODE_TURBO_A]= { 2, 2, 3, 94, 0 }, 977 [IEEE80211_MODE_TURBO_G]= { 2, 2, 3, 94, 0 }, 978 [IEEE80211_MODE_STURBO_A]={ 2, 2, 3, 94, 0 }, 979 [IEEE80211_MODE_HALF] = { 2, 3, 4, 94, 0 }, 980 [IEEE80211_MODE_QUARTER]= { 2, 3, 4, 94, 0 }, 981 [IEEE80211_MODE_11NA] = { 2, 3, 4, 94, 0 }, 982 [IEEE80211_MODE_11NG] = { 2, 3, 4, 94, 0 }, 983}; 984static const struct phyParamType bssPhyParamForAC_VO[IEEE80211_MODE_MAX] = { 985 [IEEE80211_MODE_AUTO] = { 2, 2, 3, 47, 0 }, 986 [IEEE80211_MODE_11A] = { 2, 2, 3, 47, 0 }, 987 [IEEE80211_MODE_11B] = { 2, 2, 3, 102, 0 }, 988 [IEEE80211_MODE_11G] = { 2, 2, 3, 47, 0 }, 989 [IEEE80211_MODE_FH] = { 2, 2, 3, 102, 0 }, 990 [IEEE80211_MODE_TURBO_A]= { 1, 2, 2, 47, 0 }, 991 [IEEE80211_MODE_TURBO_G]= { 1, 2, 2, 47, 0 }, 992 [IEEE80211_MODE_STURBO_A]={ 1, 2, 2, 47, 0 }, 993 [IEEE80211_MODE_HALF] = { 2, 2, 3, 47, 0 }, 994 [IEEE80211_MODE_QUARTER]= { 2, 2, 3, 47, 0 }, 995 [IEEE80211_MODE_11NA] = { 2, 2, 3, 47, 0 }, 996 [IEEE80211_MODE_11NG] = { 2, 2, 3, 47, 0 }, 997}; 998 999static void 1000_setifsparams(struct wmeParams *wmep, const paramType *phy) 1001{ 1002 wmep->wmep_aifsn = phy->aifsn; 1003 wmep->wmep_logcwmin = phy->logcwmin; 1004 wmep->wmep_logcwmax = phy->logcwmax; 1005 wmep->wmep_txopLimit = phy->txopLimit; 1006} 1007 1008static void 1009setwmeparams(struct ieee80211vap *vap, const char *type, int ac, 1010 struct wmeParams *wmep, const paramType *phy) 1011{ 1012 wmep->wmep_acm = phy->acm; 1013 _setifsparams(wmep, phy); 1014 1015 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 1016 "set %s (%s) [acm %u aifsn %u logcwmin %u logcwmax %u txop %u]\n", 1017 ieee80211_wme_acnames[ac], type, 1018 wmep->wmep_acm, wmep->wmep_aifsn, wmep->wmep_logcwmin, 1019 wmep->wmep_logcwmax, wmep->wmep_txopLimit); 1020} 1021 1022static void 1023ieee80211_wme_initparams_locked(struct ieee80211vap *vap) 1024{ 1025 struct ieee80211com *ic = vap->iv_ic; 1026 struct ieee80211_wme_state *wme = &ic->ic_wme; 1027 const paramType *pPhyParam, *pBssPhyParam; 1028 struct wmeParams *wmep; 1029 enum ieee80211_phymode mode; 1030 int i; 1031 1032 IEEE80211_LOCK_ASSERT(ic); 1033 1034 if ((ic->ic_caps & IEEE80211_C_WME) == 0 || ic->ic_nrunning > 1) 1035 return; 1036 1037 /* 1038 * Clear the wme cap_info field so a qoscount from a previous 1039 * vap doesn't confuse later code which only parses the beacon 1040 * field and updates hardware when said field changes. 1041 * Otherwise the hardware is programmed with defaults, not what 1042 * the beacon actually announces. 1043 */ 1044 wme->wme_wmeChanParams.cap_info = 0; 1045 1046 /* 1047 * Select mode; we can be called early in which case we 1048 * always use auto mode. We know we'll be called when 1049 * entering the RUN state with bsschan setup properly 1050 * so state will eventually get set correctly 1051 */ 1052 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC) 1053 mode = ieee80211_chan2mode(ic->ic_bsschan); 1054 else 1055 mode = IEEE80211_MODE_AUTO; 1056 for (i = 0; i < WME_NUM_AC; i++) { 1057 switch (i) { 1058 case WME_AC_BK: 1059 pPhyParam = &phyParamForAC_BK[mode]; 1060 pBssPhyParam = &phyParamForAC_BK[mode]; 1061 break; 1062 case WME_AC_VI: 1063 pPhyParam = &phyParamForAC_VI[mode]; 1064 pBssPhyParam = &bssPhyParamForAC_VI[mode]; 1065 break; 1066 case WME_AC_VO: 1067 pPhyParam = &phyParamForAC_VO[mode]; 1068 pBssPhyParam = &bssPhyParamForAC_VO[mode]; 1069 break; 1070 case WME_AC_BE: 1071 default: 1072 pPhyParam = &phyParamForAC_BE[mode]; 1073 pBssPhyParam = &bssPhyParamForAC_BE[mode]; 1074 break; 1075 } 1076 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i]; 1077 if (ic->ic_opmode == IEEE80211_M_HOSTAP) { 1078 setwmeparams(vap, "chan", i, wmep, pPhyParam); 1079 } else { 1080 setwmeparams(vap, "chan", i, wmep, pBssPhyParam); 1081 } 1082 wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i]; 1083 setwmeparams(vap, "bss ", i, wmep, pBssPhyParam); 1084 } 1085 /* NB: check ic_bss to avoid NULL deref on initial attach */ 1086 if (vap->iv_bss != NULL) { 1087 /* 1088 * Calculate aggressive mode switching threshold based 1089 * on beacon interval. This doesn't need locking since 1090 * we're only called before entering the RUN state at 1091 * which point we start sending beacon frames. 1092 */ 1093 wme->wme_hipri_switch_thresh = 1094 (HIGH_PRI_SWITCH_THRESH * vap->iv_bss->ni_intval) / 100; 1095 wme->wme_flags &= ~WME_F_AGGRMODE; 1096 ieee80211_wme_updateparams(vap); 1097 } 1098} 1099 1100void 1101ieee80211_wme_initparams(struct ieee80211vap *vap) 1102{ 1103 struct ieee80211com *ic = vap->iv_ic; 1104 1105 IEEE80211_LOCK(ic); 1106 ieee80211_wme_initparams_locked(vap); 1107 IEEE80211_UNLOCK(ic); 1108} 1109 1110/* 1111 * Update WME parameters for ourself and the BSS. 1112 */ 1113void 1114ieee80211_wme_updateparams_locked(struct ieee80211vap *vap) 1115{ 1116 static const paramType aggrParam[IEEE80211_MODE_MAX] = { 1117 [IEEE80211_MODE_AUTO] = { 2, 4, 10, 64, 0 }, 1118 [IEEE80211_MODE_11A] = { 2, 4, 10, 64, 0 }, 1119 [IEEE80211_MODE_11B] = { 2, 5, 10, 64, 0 }, 1120 [IEEE80211_MODE_11G] = { 2, 4, 10, 64, 0 }, 1121 [IEEE80211_MODE_FH] = { 2, 5, 10, 64, 0 }, 1122 [IEEE80211_MODE_TURBO_A] = { 1, 3, 10, 64, 0 }, 1123 [IEEE80211_MODE_TURBO_G] = { 1, 3, 10, 64, 0 }, 1124 [IEEE80211_MODE_STURBO_A] = { 1, 3, 10, 64, 0 }, 1125 [IEEE80211_MODE_HALF] = { 2, 4, 10, 64, 0 }, 1126 [IEEE80211_MODE_QUARTER] = { 2, 4, 10, 64, 0 }, 1127 [IEEE80211_MODE_11NA] = { 2, 4, 10, 64, 0 }, /* XXXcheck*/ 1128 [IEEE80211_MODE_11NG] = { 2, 4, 10, 64, 0 }, /* XXXcheck*/ 1129 }; 1130 struct ieee80211com *ic = vap->iv_ic; 1131 struct ieee80211_wme_state *wme = &ic->ic_wme; 1132 const struct wmeParams *wmep; 1133 struct wmeParams *chanp, *bssp; 1134 enum ieee80211_phymode mode; 1135 int i; 1136 int do_aggrmode = 0; 1137 1138 /* 1139 * Set up the channel access parameters for the physical 1140 * device. First populate the configured settings. 1141 */ 1142 for (i = 0; i < WME_NUM_AC; i++) { 1143 chanp = &wme->wme_chanParams.cap_wmeParams[i]; 1144 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i]; 1145 chanp->wmep_aifsn = wmep->wmep_aifsn; 1146 chanp->wmep_logcwmin = wmep->wmep_logcwmin; 1147 chanp->wmep_logcwmax = wmep->wmep_logcwmax; 1148 chanp->wmep_txopLimit = wmep->wmep_txopLimit; 1149 1150 chanp = &wme->wme_bssChanParams.cap_wmeParams[i]; 1151 wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i]; 1152 chanp->wmep_aifsn = wmep->wmep_aifsn; 1153 chanp->wmep_logcwmin = wmep->wmep_logcwmin; 1154 chanp->wmep_logcwmax = wmep->wmep_logcwmax; 1155 chanp->wmep_txopLimit = wmep->wmep_txopLimit; 1156 } 1157 1158 /* 1159 * Select mode; we can be called early in which case we 1160 * always use auto mode. We know we'll be called when 1161 * entering the RUN state with bsschan setup properly 1162 * so state will eventually get set correctly 1163 */ 1164 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC) 1165 mode = ieee80211_chan2mode(ic->ic_bsschan); 1166 else 1167 mode = IEEE80211_MODE_AUTO; 1168 1169 /* 1170 * This implements aggressive mode as found in certain 1171 * vendors' AP's. When there is significant high 1172 * priority (VI/VO) traffic in the BSS throttle back BE 1173 * traffic by using conservative parameters. Otherwise 1174 * BE uses aggressive params to optimize performance of 1175 * legacy/non-QoS traffic. 1176 */ 1177 1178 /* Hostap? Only if aggressive mode is enabled */ 1179 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 1180 (wme->wme_flags & WME_F_AGGRMODE) != 0) 1181 do_aggrmode = 1; 1182 1183 /* 1184 * Station? Only if we're in a non-QoS BSS. 1185 */ 1186 else if ((vap->iv_opmode == IEEE80211_M_STA && 1187 (vap->iv_bss->ni_flags & IEEE80211_NODE_QOS) == 0)) 1188 do_aggrmode = 1; 1189 1190 /* 1191 * IBSS? Only if we we have WME enabled. 1192 */ 1193 else if ((vap->iv_opmode == IEEE80211_M_IBSS) && 1194 (vap->iv_flags & IEEE80211_F_WME)) 1195 do_aggrmode = 1; 1196 1197 /* 1198 * If WME is disabled on this VAP, default to aggressive mode 1199 * regardless of the configuration. 1200 */ 1201 if ((vap->iv_flags & IEEE80211_F_WME) == 0) 1202 do_aggrmode = 1; 1203 1204 /* XXX WDS? */ 1205 1206 /* XXX MBSS? */ 1207 1208 if (do_aggrmode) { 1209 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE]; 1210 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE]; 1211 1212 chanp->wmep_aifsn = bssp->wmep_aifsn = aggrParam[mode].aifsn; 1213 chanp->wmep_logcwmin = bssp->wmep_logcwmin = 1214 aggrParam[mode].logcwmin; 1215 chanp->wmep_logcwmax = bssp->wmep_logcwmax = 1216 aggrParam[mode].logcwmax; 1217 chanp->wmep_txopLimit = bssp->wmep_txopLimit = 1218 (vap->iv_flags & IEEE80211_F_BURST) ? 1219 aggrParam[mode].txopLimit : 0; 1220 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 1221 "update %s (chan+bss) [acm %u aifsn %u logcwmin %u " 1222 "logcwmax %u txop %u]\n", ieee80211_wme_acnames[WME_AC_BE], 1223 chanp->wmep_acm, chanp->wmep_aifsn, chanp->wmep_logcwmin, 1224 chanp->wmep_logcwmax, chanp->wmep_txopLimit); 1225 } 1226 1227 1228 /* 1229 * Change the contention window based on the number of associated 1230 * stations. If the number of associated stations is 1 and 1231 * aggressive mode is enabled, lower the contention window even 1232 * further. 1233 */ 1234 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 1235 ic->ic_sta_assoc < 2 && (wme->wme_flags & WME_F_AGGRMODE) != 0) { 1236 static const uint8_t logCwMin[IEEE80211_MODE_MAX] = { 1237 [IEEE80211_MODE_AUTO] = 3, 1238 [IEEE80211_MODE_11A] = 3, 1239 [IEEE80211_MODE_11B] = 4, 1240 [IEEE80211_MODE_11G] = 3, 1241 [IEEE80211_MODE_FH] = 4, 1242 [IEEE80211_MODE_TURBO_A] = 3, 1243 [IEEE80211_MODE_TURBO_G] = 3, 1244 [IEEE80211_MODE_STURBO_A] = 3, 1245 [IEEE80211_MODE_HALF] = 3, 1246 [IEEE80211_MODE_QUARTER] = 3, 1247 [IEEE80211_MODE_11NA] = 3, 1248 [IEEE80211_MODE_11NG] = 3, 1249 }; 1250 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE]; 1251 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE]; 1252 1253 chanp->wmep_logcwmin = bssp->wmep_logcwmin = logCwMin[mode]; 1254 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 1255 "update %s (chan+bss) logcwmin %u\n", 1256 ieee80211_wme_acnames[WME_AC_BE], chanp->wmep_logcwmin); 1257 } 1258 1259 /* 1260 * Arrange for the beacon update. 1261 * 1262 * XXX what about MBSS, WDS? 1263 */ 1264 if (vap->iv_opmode == IEEE80211_M_HOSTAP 1265 || vap->iv_opmode == IEEE80211_M_IBSS) { 1266 /* 1267 * Arrange for a beacon update and bump the parameter 1268 * set number so associated stations load the new values. 1269 */ 1270 wme->wme_bssChanParams.cap_info = 1271 (wme->wme_bssChanParams.cap_info+1) & WME_QOSINFO_COUNT; 1272 ieee80211_beacon_notify(vap, IEEE80211_BEACON_WME); 1273 } 1274 1275 /* schedule the deferred WME update */ 1276 ieee80211_runtask(ic, &ic->ic_wme_task); 1277 1278 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 1279 "%s: WME params updated, cap_info 0x%x\n", __func__, 1280 vap->iv_opmode == IEEE80211_M_STA ? 1281 wme->wme_wmeChanParams.cap_info : 1282 wme->wme_bssChanParams.cap_info); 1283} 1284 1285void 1286ieee80211_wme_updateparams(struct ieee80211vap *vap) 1287{ 1288 struct ieee80211com *ic = vap->iv_ic; 1289 1290 if (ic->ic_caps & IEEE80211_C_WME) { 1291 IEEE80211_LOCK(ic); 1292 ieee80211_wme_updateparams_locked(vap); 1293 IEEE80211_UNLOCK(ic); 1294 } 1295} 1296 1297static void 1298parent_updown(void *arg, int npending) 1299{ 1300 struct ieee80211com *ic = arg; 1301 1302 ic->ic_parent(ic); 1303} 1304 1305static void 1306update_mcast(void *arg, int npending) 1307{ 1308 struct ieee80211com *ic = arg; 1309 1310 ic->ic_update_mcast(ic); 1311} 1312 1313static void 1314update_promisc(void *arg, int npending) 1315{ 1316 struct ieee80211com *ic = arg; 1317 1318 ic->ic_update_promisc(ic); 1319} 1320 1321static void 1322update_channel(void *arg, int npending) 1323{ 1324 struct ieee80211com *ic = arg; 1325 1326 ic->ic_set_channel(ic); 1327 ieee80211_radiotap_chan_change(ic); 1328} 1329 1330static void 1331update_chw(void *arg, int npending) 1332{ 1333 struct ieee80211com *ic = arg; 1334 1335 /* 1336 * XXX should we defer the channel width _config_ update until now? 1337 */ 1338 ic->ic_update_chw(ic); 1339} 1340 1341static void 1342update_wme(void *arg, int npending) 1343{ 1344 struct ieee80211com *ic = arg; 1345 1346 /* 1347 * XXX should we defer the WME configuration update until now? 1348 */ 1349 ic->ic_wme.wme_update(ic); 1350} 1351 1352static void 1353restart_vaps(void *arg, int npending) 1354{ 1355 struct ieee80211com *ic = arg; 1356 1357 ieee80211_suspend_all(ic); 1358 ieee80211_resume_all(ic); 1359} 1360 1361/* 1362 * Block until the parent is in a known state. This is 1363 * used after any operations that dispatch a task (e.g. 1364 * to auto-configure the parent device up/down). 1365 */ 1366void 1367ieee80211_waitfor_parent(struct ieee80211com *ic) 1368{ 1369 taskqueue_block(ic->ic_tq); 1370 ieee80211_draintask(ic, &ic->ic_parent_task); 1371 ieee80211_draintask(ic, &ic->ic_mcast_task); 1372 ieee80211_draintask(ic, &ic->ic_promisc_task); 1373 ieee80211_draintask(ic, &ic->ic_chan_task); 1374 ieee80211_draintask(ic, &ic->ic_bmiss_task); 1375 ieee80211_draintask(ic, &ic->ic_chw_task); 1376 ieee80211_draintask(ic, &ic->ic_wme_task); 1377 taskqueue_unblock(ic->ic_tq); 1378} 1379 1380/* 1381 * Check to see whether the current channel needs reset. 1382 * 1383 * Some devices don't handle being given an invalid channel 1384 * in their operating mode very well (eg wpi(4) will throw a 1385 * firmware exception.) 1386 * 1387 * Return 0 if we're ok, 1 if the channel needs to be reset. 1388 * 1389 * See PR kern/202502. 1390 */ 1391static int 1392ieee80211_start_check_reset_chan(struct ieee80211vap *vap) 1393{ 1394 struct ieee80211com *ic = vap->iv_ic; 1395 1396 if ((vap->iv_opmode == IEEE80211_M_IBSS && 1397 IEEE80211_IS_CHAN_NOADHOC(ic->ic_curchan)) || 1398 (vap->iv_opmode == IEEE80211_M_HOSTAP && 1399 IEEE80211_IS_CHAN_NOHOSTAP(ic->ic_curchan))) 1400 return (1); 1401 return (0); 1402} 1403 1404/* 1405 * Reset the curchan to a known good state. 1406 */ 1407static void 1408ieee80211_start_reset_chan(struct ieee80211vap *vap) 1409{ 1410 struct ieee80211com *ic = vap->iv_ic; 1411 1412 ic->ic_curchan = &ic->ic_channels[0]; 1413} 1414 1415/* 1416 * Start a vap running. If this is the first vap to be 1417 * set running on the underlying device then we 1418 * automatically bring the device up. 1419 */ 1420void 1421ieee80211_start_locked(struct ieee80211vap *vap) 1422{ 1423 struct ifnet *ifp = vap->iv_ifp; 1424 struct ieee80211com *ic = vap->iv_ic; 1425 1426 IEEE80211_LOCK_ASSERT(ic); 1427 1428 IEEE80211_DPRINTF(vap, 1429 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1430 "start running, %d vaps running\n", ic->ic_nrunning); 1431 1432 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) { 1433 /* 1434 * Mark us running. Note that it's ok to do this first; 1435 * if we need to bring the parent device up we defer that 1436 * to avoid dropping the com lock. We expect the device 1437 * to respond to being marked up by calling back into us 1438 * through ieee80211_start_all at which point we'll come 1439 * back in here and complete the work. 1440 */ 1441 ifp->if_drv_flags |= IFF_DRV_RUNNING; 1442 /* 1443 * We are not running; if this we are the first vap 1444 * to be brought up auto-up the parent if necessary. 1445 */ 1446 if (ic->ic_nrunning++ == 0) { 1447 1448 /* reset the channel to a known good channel */ 1449 if (ieee80211_start_check_reset_chan(vap)) 1450 ieee80211_start_reset_chan(vap); 1451 1452 IEEE80211_DPRINTF(vap, 1453 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1454 "%s: up parent %s\n", __func__, ic->ic_name); 1455 ieee80211_runtask(ic, &ic->ic_parent_task); 1456 return; 1457 } 1458 } 1459 /* 1460 * If the parent is up and running, then kick the 1461 * 802.11 state machine as appropriate. 1462 */ 1463 if (vap->iv_roaming != IEEE80211_ROAMING_MANUAL) { 1464 if (vap->iv_opmode == IEEE80211_M_STA) { 1465#if 0 1466 /* XXX bypasses scan too easily; disable for now */ 1467 /* 1468 * Try to be intelligent about clocking the state 1469 * machine. If we're currently in RUN state then 1470 * we should be able to apply any new state/parameters 1471 * simply by re-associating. Otherwise we need to 1472 * re-scan to select an appropriate ap. 1473 */ 1474 if (vap->iv_state >= IEEE80211_S_RUN) 1475 ieee80211_new_state_locked(vap, 1476 IEEE80211_S_ASSOC, 1); 1477 else 1478#endif 1479 ieee80211_new_state_locked(vap, 1480 IEEE80211_S_SCAN, 0); 1481 } else { 1482 /* 1483 * For monitor+wds mode there's nothing to do but 1484 * start running. Otherwise if this is the first 1485 * vap to be brought up, start a scan which may be 1486 * preempted if the station is locked to a particular 1487 * channel. 1488 */ 1489 vap->iv_flags_ext |= IEEE80211_FEXT_REINIT; 1490 if (vap->iv_opmode == IEEE80211_M_MONITOR || 1491 vap->iv_opmode == IEEE80211_M_WDS) 1492 ieee80211_new_state_locked(vap, 1493 IEEE80211_S_RUN, -1); 1494 else 1495 ieee80211_new_state_locked(vap, 1496 IEEE80211_S_SCAN, 0); 1497 } 1498 } 1499} 1500 1501/* 1502 * Start a single vap. 1503 */ 1504void 1505ieee80211_init(void *arg) 1506{ 1507 struct ieee80211vap *vap = arg; 1508 1509 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1510 "%s\n", __func__); 1511 1512 IEEE80211_LOCK(vap->iv_ic); 1513 ieee80211_start_locked(vap); 1514 IEEE80211_UNLOCK(vap->iv_ic); 1515} 1516 1517/* 1518 * Start all runnable vap's on a device. 1519 */ 1520void 1521ieee80211_start_all(struct ieee80211com *ic) 1522{ 1523 struct ieee80211vap *vap; 1524 1525 IEEE80211_LOCK(ic); 1526 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1527 struct ifnet *ifp = vap->iv_ifp; 1528 if (IFNET_IS_UP_RUNNING(ifp)) /* NB: avoid recursion */ 1529 ieee80211_start_locked(vap); 1530 } 1531 IEEE80211_UNLOCK(ic); 1532} 1533 1534/* 1535 * Stop a vap. We force it down using the state machine 1536 * then mark it's ifnet not running. If this is the last 1537 * vap running on the underlying device then we close it 1538 * too to insure it will be properly initialized when the 1539 * next vap is brought up. 1540 */ 1541void 1542ieee80211_stop_locked(struct ieee80211vap *vap) 1543{ 1544 struct ieee80211com *ic = vap->iv_ic; 1545 struct ifnet *ifp = vap->iv_ifp; 1546 1547 IEEE80211_LOCK_ASSERT(ic); 1548 1549 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1550 "stop running, %d vaps running\n", ic->ic_nrunning); 1551 1552 ieee80211_new_state_locked(vap, IEEE80211_S_INIT, -1); 1553 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 1554 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; /* mark us stopped */ 1555 if (--ic->ic_nrunning == 0) { 1556 IEEE80211_DPRINTF(vap, 1557 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1558 "down parent %s\n", ic->ic_name); 1559 ieee80211_runtask(ic, &ic->ic_parent_task); 1560 } 1561 } 1562} 1563 1564void 1565ieee80211_stop(struct ieee80211vap *vap) 1566{ 1567 struct ieee80211com *ic = vap->iv_ic; 1568 1569 IEEE80211_LOCK(ic); 1570 ieee80211_stop_locked(vap); 1571 IEEE80211_UNLOCK(ic); 1572} 1573 1574/* 1575 * Stop all vap's running on a device. 1576 */ 1577void 1578ieee80211_stop_all(struct ieee80211com *ic) 1579{ 1580 struct ieee80211vap *vap; 1581 1582 IEEE80211_LOCK(ic); 1583 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1584 struct ifnet *ifp = vap->iv_ifp; 1585 if (IFNET_IS_UP_RUNNING(ifp)) /* NB: avoid recursion */ 1586 ieee80211_stop_locked(vap); 1587 } 1588 IEEE80211_UNLOCK(ic); 1589 1590 ieee80211_waitfor_parent(ic); 1591} 1592 1593/* 1594 * Stop all vap's running on a device and arrange 1595 * for those that were running to be resumed. 1596 */ 1597void 1598ieee80211_suspend_all(struct ieee80211com *ic) 1599{ 1600 struct ieee80211vap *vap; 1601 1602 IEEE80211_LOCK(ic); 1603 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1604 struct ifnet *ifp = vap->iv_ifp; 1605 if (IFNET_IS_UP_RUNNING(ifp)) { /* NB: avoid recursion */ 1606 vap->iv_flags_ext |= IEEE80211_FEXT_RESUME; 1607 ieee80211_stop_locked(vap); 1608 } 1609 } 1610 IEEE80211_UNLOCK(ic); 1611 1612 ieee80211_waitfor_parent(ic); 1613} 1614 1615/* 1616 * Start all vap's marked for resume. 1617 */ 1618void 1619ieee80211_resume_all(struct ieee80211com *ic) 1620{ 1621 struct ieee80211vap *vap; 1622 1623 IEEE80211_LOCK(ic); 1624 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1625 struct ifnet *ifp = vap->iv_ifp; 1626 if (!IFNET_IS_UP_RUNNING(ifp) && 1627 (vap->iv_flags_ext & IEEE80211_FEXT_RESUME)) { 1628 vap->iv_flags_ext &= ~IEEE80211_FEXT_RESUME; 1629 ieee80211_start_locked(vap); 1630 } 1631 } 1632 IEEE80211_UNLOCK(ic); 1633} 1634 1635/* 1636 * Restart all vap's running on a device. 1637 */ 1638void 1639ieee80211_restart_all(struct ieee80211com *ic) 1640{ 1641 /* 1642 * NB: do not use ieee80211_runtask here, we will 1643 * block & drain net80211 taskqueue. 1644 */ 1645 taskqueue_enqueue(taskqueue_thread, &ic->ic_restart_task); 1646} 1647 1648void 1649ieee80211_beacon_miss(struct ieee80211com *ic) 1650{ 1651 IEEE80211_LOCK(ic); 1652 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 1653 /* Process in a taskq, the handler may reenter the driver */ 1654 ieee80211_runtask(ic, &ic->ic_bmiss_task); 1655 } 1656 IEEE80211_UNLOCK(ic); 1657} 1658 1659static void 1660beacon_miss(void *arg, int npending) 1661{ 1662 struct ieee80211com *ic = arg; 1663 struct ieee80211vap *vap; 1664 1665 IEEE80211_LOCK(ic); 1666 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1667 /* 1668 * We only pass events through for sta vap's in RUN+ state; 1669 * may be too restrictive but for now this saves all the 1670 * handlers duplicating these checks. 1671 */ 1672 if (vap->iv_opmode == IEEE80211_M_STA && 1673 vap->iv_state >= IEEE80211_S_RUN && 1674 vap->iv_bmiss != NULL) 1675 vap->iv_bmiss(vap); 1676 } 1677 IEEE80211_UNLOCK(ic); 1678} 1679 1680static void 1681beacon_swmiss(void *arg, int npending) 1682{ 1683 struct ieee80211vap *vap = arg; 1684 struct ieee80211com *ic = vap->iv_ic; 1685 1686 IEEE80211_LOCK(ic); 1687 if (vap->iv_state >= IEEE80211_S_RUN) { 1688 /* XXX Call multiple times if npending > zero? */ 1689 vap->iv_bmiss(vap); 1690 } 1691 IEEE80211_UNLOCK(ic); 1692} 1693 1694/* 1695 * Software beacon miss handling. Check if any beacons 1696 * were received in the last period. If not post a 1697 * beacon miss; otherwise reset the counter. 1698 */ 1699void 1700ieee80211_swbmiss(void *arg) 1701{ 1702 struct ieee80211vap *vap = arg; 1703 struct ieee80211com *ic = vap->iv_ic; 1704 1705 IEEE80211_LOCK_ASSERT(ic); 1706 1707 KASSERT(vap->iv_state >= IEEE80211_S_RUN, 1708 ("wrong state %d", vap->iv_state)); 1709 1710 if (ic->ic_flags & IEEE80211_F_SCAN) { 1711 /* 1712 * If scanning just ignore and reset state. If we get a 1713 * bmiss after coming out of scan because we haven't had 1714 * time to receive a beacon then we should probe the AP 1715 * before posting a real bmiss (unless iv_bmiss_max has 1716 * been artifiically lowered). A cleaner solution might 1717 * be to disable the timer on scan start/end but to handle 1718 * case of multiple sta vap's we'd need to disable the 1719 * timers of all affected vap's. 1720 */ 1721 vap->iv_swbmiss_count = 0; 1722 } else if (vap->iv_swbmiss_count == 0) { 1723 if (vap->iv_bmiss != NULL) 1724 ieee80211_runtask(ic, &vap->iv_swbmiss_task); 1725 } else 1726 vap->iv_swbmiss_count = 0; 1727 callout_reset(&vap->iv_swbmiss, vap->iv_swbmiss_period, 1728 ieee80211_swbmiss, vap); 1729} 1730 1731/* 1732 * Start an 802.11h channel switch. We record the parameters, 1733 * mark the operation pending, notify each vap through the 1734 * beacon update mechanism so it can update the beacon frame 1735 * contents, and then switch vap's to CSA state to block outbound 1736 * traffic. Devices that handle CSA directly can use the state 1737 * switch to do the right thing so long as they call 1738 * ieee80211_csa_completeswitch when it's time to complete the 1739 * channel change. Devices that depend on the net80211 layer can 1740 * use ieee80211_beacon_update to handle the countdown and the 1741 * channel switch. 1742 */ 1743void 1744ieee80211_csa_startswitch(struct ieee80211com *ic, 1745 struct ieee80211_channel *c, int mode, int count) 1746{ 1747 struct ieee80211vap *vap; 1748 1749 IEEE80211_LOCK_ASSERT(ic); 1750 1751 ic->ic_csa_newchan = c; 1752 ic->ic_csa_mode = mode; 1753 ic->ic_csa_count = count; 1754 ic->ic_flags |= IEEE80211_F_CSAPENDING; 1755 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1756 if (vap->iv_opmode == IEEE80211_M_HOSTAP || 1757 vap->iv_opmode == IEEE80211_M_IBSS || 1758 vap->iv_opmode == IEEE80211_M_MBSS) 1759 ieee80211_beacon_notify(vap, IEEE80211_BEACON_CSA); 1760 /* switch to CSA state to block outbound traffic */ 1761 if (vap->iv_state == IEEE80211_S_RUN) 1762 ieee80211_new_state_locked(vap, IEEE80211_S_CSA, 0); 1763 } 1764 ieee80211_notify_csa(ic, c, mode, count); 1765} 1766 1767/* 1768 * Complete the channel switch by transitioning all CSA VAPs to RUN. 1769 * This is called by both the completion and cancellation functions 1770 * so each VAP is placed back in the RUN state and can thus transmit. 1771 */ 1772static void 1773csa_completeswitch(struct ieee80211com *ic) 1774{ 1775 struct ieee80211vap *vap; 1776 1777 ic->ic_csa_newchan = NULL; 1778 ic->ic_flags &= ~IEEE80211_F_CSAPENDING; 1779 1780 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1781 if (vap->iv_state == IEEE80211_S_CSA) 1782 ieee80211_new_state_locked(vap, IEEE80211_S_RUN, 0); 1783} 1784 1785/* 1786 * Complete an 802.11h channel switch started by ieee80211_csa_startswitch. 1787 * We clear state and move all vap's in CSA state to RUN state 1788 * so they can again transmit. 1789 * 1790 * Although this may not be completely correct, update the BSS channel 1791 * for each VAP to the newly configured channel. The setcurchan sets 1792 * the current operating channel for the interface (so the radio does 1793 * switch over) but the VAP BSS isn't updated, leading to incorrectly 1794 * reported information via ioctl. 1795 */ 1796void 1797ieee80211_csa_completeswitch(struct ieee80211com *ic) 1798{ 1799 struct ieee80211vap *vap; 1800 1801 IEEE80211_LOCK_ASSERT(ic); 1802 1803 KASSERT(ic->ic_flags & IEEE80211_F_CSAPENDING, ("csa not pending")); 1804 1805 ieee80211_setcurchan(ic, ic->ic_csa_newchan); 1806 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1807 if (vap->iv_state == IEEE80211_S_CSA) 1808 vap->iv_bss->ni_chan = ic->ic_curchan; 1809 1810 csa_completeswitch(ic); 1811} 1812 1813/* 1814 * Cancel an 802.11h channel switch started by ieee80211_csa_startswitch. 1815 * We clear state and move all vap's in CSA state to RUN state 1816 * so they can again transmit. 1817 */ 1818void 1819ieee80211_csa_cancelswitch(struct ieee80211com *ic) 1820{ 1821 IEEE80211_LOCK_ASSERT(ic); 1822 1823 csa_completeswitch(ic); 1824} 1825 1826/* 1827 * Complete a DFS CAC started by ieee80211_dfs_cac_start. 1828 * We clear state and move all vap's in CAC state to RUN state. 1829 */ 1830void 1831ieee80211_cac_completeswitch(struct ieee80211vap *vap0) 1832{ 1833 struct ieee80211com *ic = vap0->iv_ic; 1834 struct ieee80211vap *vap; 1835 1836 IEEE80211_LOCK(ic); 1837 /* 1838 * Complete CAC state change for lead vap first; then 1839 * clock all the other vap's waiting. 1840 */ 1841 KASSERT(vap0->iv_state == IEEE80211_S_CAC, 1842 ("wrong state %d", vap0->iv_state)); 1843 ieee80211_new_state_locked(vap0, IEEE80211_S_RUN, 0); 1844 1845 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1846 if (vap->iv_state == IEEE80211_S_CAC) 1847 ieee80211_new_state_locked(vap, IEEE80211_S_RUN, 0); 1848 IEEE80211_UNLOCK(ic); 1849} 1850 1851/* 1852 * Force all vap's other than the specified vap to the INIT state 1853 * and mark them as waiting for a scan to complete. These vaps 1854 * will be brought up when the scan completes and the scanning vap 1855 * reaches RUN state by wakeupwaiting. 1856 */ 1857static void 1858markwaiting(struct ieee80211vap *vap0) 1859{ 1860 struct ieee80211com *ic = vap0->iv_ic; 1861 struct ieee80211vap *vap; 1862 1863 IEEE80211_LOCK_ASSERT(ic); 1864 1865 /* 1866 * A vap list entry can not disappear since we are running on the 1867 * taskqueue and a vap destroy will queue and drain another state 1868 * change task. 1869 */ 1870 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1871 if (vap == vap0) 1872 continue; 1873 if (vap->iv_state != IEEE80211_S_INIT) { 1874 /* NB: iv_newstate may drop the lock */ 1875 vap->iv_newstate(vap, IEEE80211_S_INIT, 0); 1876 IEEE80211_LOCK_ASSERT(ic); 1877 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT; 1878 } 1879 } 1880} 1881 1882/* 1883 * Wakeup all vap's waiting for a scan to complete. This is the 1884 * companion to markwaiting (above) and is used to coordinate 1885 * multiple vaps scanning. 1886 * This is called from the state taskqueue. 1887 */ 1888static void 1889wakeupwaiting(struct ieee80211vap *vap0) 1890{ 1891 struct ieee80211com *ic = vap0->iv_ic; 1892 struct ieee80211vap *vap; 1893 1894 IEEE80211_LOCK_ASSERT(ic); 1895 1896 /* 1897 * A vap list entry can not disappear since we are running on the 1898 * taskqueue and a vap destroy will queue and drain another state 1899 * change task. 1900 */ 1901 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1902 if (vap == vap0) 1903 continue; 1904 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANWAIT) { 1905 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANWAIT; 1906 /* NB: sta's cannot go INIT->RUN */ 1907 /* NB: iv_newstate may drop the lock */ 1908 vap->iv_newstate(vap, 1909 vap->iv_opmode == IEEE80211_M_STA ? 1910 IEEE80211_S_SCAN : IEEE80211_S_RUN, 0); 1911 IEEE80211_LOCK_ASSERT(ic); 1912 } 1913 } 1914} 1915 1916/* 1917 * Handle post state change work common to all operating modes. 1918 */ 1919static void 1920ieee80211_newstate_cb(void *xvap, int npending) 1921{ 1922 struct ieee80211vap *vap = xvap; 1923 struct ieee80211com *ic = vap->iv_ic; 1924 enum ieee80211_state nstate, ostate; 1925 int arg, rc; 1926 1927 IEEE80211_LOCK(ic); 1928 nstate = vap->iv_nstate; 1929 arg = vap->iv_nstate_arg; 1930 1931 if (vap->iv_flags_ext & IEEE80211_FEXT_REINIT) { 1932 /* 1933 * We have been requested to drop back to the INIT before 1934 * proceeding to the new state. 1935 */ 1936 /* Deny any state changes while we are here. */ 1937 vap->iv_nstate = IEEE80211_S_INIT; 1938 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1939 "%s: %s -> %s arg %d\n", __func__, 1940 ieee80211_state_name[vap->iv_state], 1941 ieee80211_state_name[vap->iv_nstate], arg); 1942 vap->iv_newstate(vap, vap->iv_nstate, 0); 1943 IEEE80211_LOCK_ASSERT(ic); 1944 vap->iv_flags_ext &= ~(IEEE80211_FEXT_REINIT | 1945 IEEE80211_FEXT_STATEWAIT); 1946 /* enqueue new state transition after cancel_scan() task */ 1947 ieee80211_new_state_locked(vap, nstate, arg); 1948 goto done; 1949 } 1950 1951 ostate = vap->iv_state; 1952 if (nstate == IEEE80211_S_SCAN && ostate != IEEE80211_S_INIT) { 1953 /* 1954 * SCAN was forced; e.g. on beacon miss. Force other running 1955 * vap's to INIT state and mark them as waiting for the scan to 1956 * complete. This insures they don't interfere with our 1957 * scanning. Since we are single threaded the vaps can not 1958 * transition again while we are executing. 1959 * 1960 * XXX not always right, assumes ap follows sta 1961 */ 1962 markwaiting(vap); 1963 } 1964 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1965 "%s: %s -> %s arg %d\n", __func__, 1966 ieee80211_state_name[ostate], ieee80211_state_name[nstate], arg); 1967 1968 rc = vap->iv_newstate(vap, nstate, arg); 1969 IEEE80211_LOCK_ASSERT(ic); 1970 vap->iv_flags_ext &= ~IEEE80211_FEXT_STATEWAIT; 1971 if (rc != 0) { 1972 /* State transition failed */ 1973 KASSERT(rc != EINPROGRESS, ("iv_newstate was deferred")); 1974 KASSERT(nstate != IEEE80211_S_INIT, 1975 ("INIT state change failed")); 1976 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1977 "%s: %s returned error %d\n", __func__, 1978 ieee80211_state_name[nstate], rc); 1979 goto done; 1980 } 1981 1982 /* No actual transition, skip post processing */ 1983 if (ostate == nstate) 1984 goto done; 1985 1986 if (nstate == IEEE80211_S_RUN) { 1987 /* 1988 * OACTIVE may be set on the vap if the upper layer 1989 * tried to transmit (e.g. IPv6 NDP) before we reach 1990 * RUN state. Clear it and restart xmit. 1991 * 1992 * Note this can also happen as a result of SLEEP->RUN 1993 * (i.e. coming out of power save mode). 1994 */ 1995 vap->iv_ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 1996 1997 /* 1998 * XXX TODO Kick-start a VAP queue - this should be a method! 1999 */ 2000 2001 /* bring up any vaps waiting on us */ 2002 wakeupwaiting(vap); 2003 } else if (nstate == IEEE80211_S_INIT) { 2004 /* 2005 * Flush the scan cache if we did the last scan (XXX?) 2006 * and flush any frames on send queues from this vap. 2007 * Note the mgt q is used only for legacy drivers and 2008 * will go away shortly. 2009 */ 2010 ieee80211_scan_flush(vap); 2011 2012 /* 2013 * XXX TODO: ic/vap queue flush 2014 */ 2015 } 2016done: 2017 IEEE80211_UNLOCK(ic); 2018} 2019 2020/* 2021 * Public interface for initiating a state machine change. 2022 * This routine single-threads the request and coordinates 2023 * the scheduling of multiple vaps for the purpose of selecting 2024 * an operating channel. Specifically the following scenarios 2025 * are handled: 2026 * o only one vap can be selecting a channel so on transition to 2027 * SCAN state if another vap is already scanning then 2028 * mark the caller for later processing and return without 2029 * doing anything (XXX? expectations by caller of synchronous operation) 2030 * o only one vap can be doing CAC of a channel so on transition to 2031 * CAC state if another vap is already scanning for radar then 2032 * mark the caller for later processing and return without 2033 * doing anything (XXX? expectations by caller of synchronous operation) 2034 * o if another vap is already running when a request is made 2035 * to SCAN then an operating channel has been chosen; bypass 2036 * the scan and just join the channel 2037 * 2038 * Note that the state change call is done through the iv_newstate 2039 * method pointer so any driver routine gets invoked. The driver 2040 * will normally call back into operating mode-specific 2041 * ieee80211_newstate routines (below) unless it needs to completely 2042 * bypass the state machine (e.g. because the firmware has it's 2043 * own idea how things should work). Bypassing the net80211 layer 2044 * is usually a mistake and indicates lack of proper integration 2045 * with the net80211 layer. 2046 */ 2047int 2048ieee80211_new_state_locked(struct ieee80211vap *vap, 2049 enum ieee80211_state nstate, int arg) 2050{ 2051 struct ieee80211com *ic = vap->iv_ic; 2052 struct ieee80211vap *vp; 2053 enum ieee80211_state ostate; 2054 int nrunning, nscanning; 2055 2056 IEEE80211_LOCK_ASSERT(ic); 2057 2058 if (vap->iv_flags_ext & IEEE80211_FEXT_STATEWAIT) { 2059 if (vap->iv_nstate == IEEE80211_S_INIT || 2060 ((vap->iv_state == IEEE80211_S_INIT || 2061 (vap->iv_flags_ext & IEEE80211_FEXT_REINIT)) && 2062 vap->iv_nstate == IEEE80211_S_SCAN && 2063 nstate > IEEE80211_S_SCAN)) { 2064 /* 2065 * XXX The vap is being stopped/started, 2066 * do not allow any other state changes 2067 * until this is completed. 2068 */ 2069 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 2070 "%s: %s -> %s (%s) transition discarded\n", 2071 __func__, 2072 ieee80211_state_name[vap->iv_state], 2073 ieee80211_state_name[nstate], 2074 ieee80211_state_name[vap->iv_nstate]); 2075 return -1; 2076 } else if (vap->iv_state != vap->iv_nstate) { 2077#if 0 2078 /* Warn if the previous state hasn't completed. */ 2079 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 2080 "%s: pending %s -> %s transition lost\n", __func__, 2081 ieee80211_state_name[vap->iv_state], 2082 ieee80211_state_name[vap->iv_nstate]); 2083#else 2084 /* XXX temporarily enable to identify issues */ 2085 if_printf(vap->iv_ifp, 2086 "%s: pending %s -> %s transition lost\n", 2087 __func__, ieee80211_state_name[vap->iv_state], 2088 ieee80211_state_name[vap->iv_nstate]); 2089#endif 2090 } 2091 } 2092 2093 nrunning = nscanning = 0; 2094 /* XXX can track this state instead of calculating */ 2095 TAILQ_FOREACH(vp, &ic->ic_vaps, iv_next) { 2096 if (vp != vap) { 2097 if (vp->iv_state >= IEEE80211_S_RUN) 2098 nrunning++; 2099 /* XXX doesn't handle bg scan */ 2100 /* NB: CAC+AUTH+ASSOC treated like SCAN */ 2101 else if (vp->iv_state > IEEE80211_S_INIT) 2102 nscanning++; 2103 } 2104 } 2105 ostate = vap->iv_state; 2106 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 2107 "%s: %s -> %s (nrunning %d nscanning %d)\n", __func__, 2108 ieee80211_state_name[ostate], ieee80211_state_name[nstate], 2109 nrunning, nscanning); 2110 switch (nstate) { 2111 case IEEE80211_S_SCAN: 2112 if (ostate == IEEE80211_S_INIT) { 2113 /* 2114 * INIT -> SCAN happens on initial bringup. 2115 */ 2116 KASSERT(!(nscanning && nrunning), 2117 ("%d scanning and %d running", nscanning, nrunning)); 2118 if (nscanning) { 2119 /* 2120 * Someone is scanning, defer our state 2121 * change until the work has completed. 2122 */ 2123 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 2124 "%s: defer %s -> %s\n", 2125 __func__, ieee80211_state_name[ostate], 2126 ieee80211_state_name[nstate]); 2127 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT; 2128 return 0; 2129 } 2130 if (nrunning) { 2131 /* 2132 * Someone is operating; just join the channel 2133 * they have chosen. 2134 */ 2135 /* XXX kill arg? */ 2136 /* XXX check each opmode, adhoc? */ 2137 if (vap->iv_opmode == IEEE80211_M_STA) 2138 nstate = IEEE80211_S_SCAN; 2139 else 2140 nstate = IEEE80211_S_RUN; 2141#ifdef IEEE80211_DEBUG 2142 if (nstate != IEEE80211_S_SCAN) { 2143 IEEE80211_DPRINTF(vap, 2144 IEEE80211_MSG_STATE, 2145 "%s: override, now %s -> %s\n", 2146 __func__, 2147 ieee80211_state_name[ostate], 2148 ieee80211_state_name[nstate]); 2149 } 2150#endif 2151 } 2152 } 2153 break; 2154 case IEEE80211_S_RUN: 2155 if (vap->iv_opmode == IEEE80211_M_WDS && 2156 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) && 2157 nscanning) { 2158 /* 2159 * Legacy WDS with someone else scanning; don't 2160 * go online until that completes as we should 2161 * follow the other vap to the channel they choose. 2162 */ 2163 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 2164 "%s: defer %s -> %s (legacy WDS)\n", __func__, 2165 ieee80211_state_name[ostate], 2166 ieee80211_state_name[nstate]); 2167 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT; 2168 return 0; 2169 } 2170 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 2171 IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) && 2172 (vap->iv_flags_ext & IEEE80211_FEXT_DFS) && 2173 !IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) { 2174 /* 2175 * This is a DFS channel, transition to CAC state 2176 * instead of RUN. This allows us to initiate 2177 * Channel Availability Check (CAC) as specified 2178 * by 11h/DFS. 2179 */ 2180 nstate = IEEE80211_S_CAC; 2181 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 2182 "%s: override %s -> %s (DFS)\n", __func__, 2183 ieee80211_state_name[ostate], 2184 ieee80211_state_name[nstate]); 2185 } 2186 break; 2187 case IEEE80211_S_INIT: 2188 /* cancel any scan in progress */ 2189 ieee80211_cancel_scan(vap); 2190 if (ostate == IEEE80211_S_INIT ) { 2191 /* XXX don't believe this */ 2192 /* INIT -> INIT. nothing to do */ 2193 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANWAIT; 2194 } 2195 /* fall thru... */ 2196 default: 2197 break; 2198 } 2199 /* defer the state change to a thread */ 2200 vap->iv_nstate = nstate; 2201 vap->iv_nstate_arg = arg; 2202 vap->iv_flags_ext |= IEEE80211_FEXT_STATEWAIT; 2203 ieee80211_runtask(ic, &vap->iv_nstate_task); 2204 return EINPROGRESS; 2205} 2206 2207int 2208ieee80211_new_state(struct ieee80211vap *vap, 2209 enum ieee80211_state nstate, int arg) 2210{ 2211 struct ieee80211com *ic = vap->iv_ic; 2212 int rc; 2213 2214 IEEE80211_LOCK(ic); 2215 rc = ieee80211_new_state_locked(vap, nstate, arg); 2216 IEEE80211_UNLOCK(ic); 2217 return rc; 2218} 2219