1 /* 2 * hostapd / IEEE 802.11 Management 3 * Copyright (c) 2002-2012, Jouni Malinen <j (at) w1.fi> 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9 #include "utils/includes.h" 10 11 #include "utils/common.h" 12 #include "common/ieee802_11_defs.h" 13 #include "hostapd.h" 14 #include "sta_info.h" 15 #include "ap_config.h" 16 #include "ap_drv_ops.h" 17 #include "ieee802_11.h" 18 19 20 #ifdef CONFIG_IEEE80211W 21 22 u8 * hostapd_eid_assoc_comeback_time(struct hostapd_data *hapd, 23 struct sta_info *sta, u8 *eid) 24 { 25 u8 *pos = eid; 26 u32 timeout, tu; 27 struct os_reltime now, passed; 28 29 *pos++ = WLAN_EID_TIMEOUT_INTERVAL; 30 *pos++ = 5; 31 *pos++ = WLAN_TIMEOUT_ASSOC_COMEBACK; 32 os_get_reltime(&now); 33 os_reltime_sub(&now, &sta->sa_query_start, &passed); 34 tu = (passed.sec * 1000000 + passed.usec) / 1024; 35 if (hapd->conf->assoc_sa_query_max_timeout > tu) 36 timeout = hapd->conf->assoc_sa_query_max_timeout - tu; 37 else 38 timeout = 0; 39 if (timeout < hapd->conf->assoc_sa_query_max_timeout) 40 timeout++; /* add some extra time for local timers */ 41 WPA_PUT_LE32(pos, timeout); 42 pos += 4; 43 44 return pos; 45 } 46 47 48 /* MLME-SAQuery.request */ 49 void ieee802_11_send_sa_query_req(struct hostapd_data *hapd, 50 const u8 *addr, const u8 *trans_id) 51 { 52 struct ieee80211_mgmt mgmt; 53 u8 *end; 54 55 wpa_printf(MSG_DEBUG, "IEEE 802.11: Sending SA Query Request to " 56 MACSTR, MAC2STR(addr)); 57 wpa_hexdump(MSG_DEBUG, "IEEE 802.11: SA Query Transaction ID", 58 trans_id, WLAN_SA_QUERY_TR_ID_LEN); 59 60 os_memset(&mgmt, 0, sizeof(mgmt)); 61 mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, 62 WLAN_FC_STYPE_ACTION); 63 os_memcpy(mgmt.da, addr, ETH_ALEN); 64 os_memcpy(mgmt.sa, hapd->own_addr, ETH_ALEN); 65 os_memcpy(mgmt.bssid, hapd->own_addr, ETH_ALEN); 66 mgmt.u.action.category = WLAN_ACTION_SA_QUERY; 67 mgmt.u.action.u.sa_query_req.action = WLAN_SA_QUERY_REQUEST; 68 os_memcpy(mgmt.u.action.u.sa_query_req.trans_id, trans_id, 69 WLAN_SA_QUERY_TR_ID_LEN); 70 end = mgmt.u.action.u.sa_query_req.trans_id + WLAN_SA_QUERY_TR_ID_LEN; 71 if (hostapd_drv_send_mlme(hapd, &mgmt, end - (u8 *) &mgmt, 0) < 0) 72 wpa_printf(MSG_INFO, "ieee802_11_send_sa_query_req: send failed"); 73 } 74 75 76 static void ieee802_11_send_sa_query_resp(struct hostapd_data *hapd, 77 const u8 *sa, const u8 *trans_id) 78 { 79 struct sta_info *sta; 80 struct ieee80211_mgmt resp; 81 u8 *end; 82 83 wpa_printf(MSG_DEBUG, "IEEE 802.11: Received SA Query Request from " 84 MACSTR, MAC2STR(sa)); 85 wpa_hexdump(MSG_DEBUG, "IEEE 802.11: SA Query Transaction ID", 86 trans_id, WLAN_SA_QUERY_TR_ID_LEN); 87 88 sta = ap_get_sta(hapd, sa); 89 if (sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) { 90 wpa_printf(MSG_DEBUG, "IEEE 802.11: Ignore SA Query Request " 91 "from unassociated STA " MACSTR, MAC2STR(sa)); 92 return; 93 } 94 95 wpa_printf(MSG_DEBUG, "IEEE 802.11: Sending SA Query Response to " 96 MACSTR, MAC2STR(sa)); 97 98 os_memset(&resp, 0, sizeof(resp)); 99 resp.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, 100 WLAN_FC_STYPE_ACTION); 101 os_memcpy(resp.da, sa, ETH_ALEN); 102 os_memcpy(resp.sa, hapd->own_addr, ETH_ALEN); 103 os_memcpy(resp.bssid, hapd->own_addr, ETH_ALEN); 104 resp.u.action.category = WLAN_ACTION_SA_QUERY; 105 resp.u.action.u.sa_query_req.action = WLAN_SA_QUERY_RESPONSE; 106 os_memcpy(resp.u.action.u.sa_query_req.trans_id, trans_id, 107 WLAN_SA_QUERY_TR_ID_LEN); 108 end = resp.u.action.u.sa_query_req.trans_id + WLAN_SA_QUERY_TR_ID_LEN; 109 if (hostapd_drv_send_mlme(hapd, &resp, end - (u8 *) &resp, 0) < 0) 110 wpa_printf(MSG_INFO, "ieee80211_mgmt_sa_query_request: send failed"); 111 } 112 113 114 void ieee802_11_sa_query_action(struct hostapd_data *hapd, const u8 *sa, 115 const u8 action_type, const u8 *trans_id) 116 { 117 struct sta_info *sta; 118 int i; 119 120 if (action_type == WLAN_SA_QUERY_REQUEST) { 121 ieee802_11_send_sa_query_resp(hapd, sa, trans_id); 122 return; 123 } 124 125 if (action_type != WLAN_SA_QUERY_RESPONSE) { 126 wpa_printf(MSG_DEBUG, "IEEE 802.11: Unexpected SA Query " 127 "Action %d", action_type); 128 return; 129 } 130 131 wpa_printf(MSG_DEBUG, "IEEE 802.11: Received SA Query Response from " 132 MACSTR, MAC2STR(sa)); 133 wpa_hexdump(MSG_DEBUG, "IEEE 802.11: SA Query Transaction ID", 134 trans_id, WLAN_SA_QUERY_TR_ID_LEN); 135 136 /* MLME-SAQuery.confirm */ 137 138 sta = ap_get_sta(hapd, sa); 139 if (sta == NULL || sta->sa_query_trans_id == NULL) { 140 wpa_printf(MSG_DEBUG, "IEEE 802.11: No matching STA with " 141 "pending SA Query request found"); 142 return; 143 } 144 145 for (i = 0; i < sta->sa_query_count; i++) { 146 if (os_memcmp(sta->sa_query_trans_id + 147 i * WLAN_SA_QUERY_TR_ID_LEN, 148 trans_id, WLAN_SA_QUERY_TR_ID_LEN) == 0) 149 break; 150 } 151 152 if (i >= sta->sa_query_count) { 153 wpa_printf(MSG_DEBUG, "IEEE 802.11: No matching SA Query " 154 "transaction identifier found"); 155 return; 156 } 157 158 hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 159 HOSTAPD_LEVEL_DEBUG, 160 "Reply to pending SA Query received"); 161 ap_sta_stop_sa_query(hapd, sta); 162 } 163 164 #endif /* CONFIG_IEEE80211W */ 165 166 167 static void hostapd_ext_capab_byte(struct hostapd_data *hapd, u8 *pos, int idx) 168 { 169 *pos = 0x00; 170 171 switch (idx) { 172 case 0: /* Bits 0-7 */ 173 if (hapd->iconf->obss_interval) 174 *pos |= 0x01; /* Bit 0 - Coexistence management */ 175 if (hapd->iface->drv_flags & WPA_DRIVER_FLAGS_AP_CSA) 176 *pos |= 0x04; /* Bit 2 - Extended Channel Switching */ 177 break; 178 case 1: /* Bits 8-15 */ 179 if (hapd->conf->proxy_arp) 180 *pos |= 0x10; /* Bit 12 - Proxy ARP */ 181 break; 182 case 2: /* Bits 16-23 */ 183 if (hapd->conf->wnm_sleep_mode) 184 *pos |= 0x02; /* Bit 17 - WNM-Sleep Mode */ 185 if (hapd->conf->bss_transition) 186 *pos |= 0x08; /* Bit 19 - BSS Transition */ 187 break; 188 case 3: /* Bits 24-31 */ 189 #ifdef CONFIG_WNM 190 *pos |= 0x02; /* Bit 25 - SSID List */ 191 #endif /* CONFIG_WNM */ 192 if (hapd->conf->time_advertisement == 2) 193 *pos |= 0x08; /* Bit 27 - UTC TSF Offset */ 194 if (hapd->conf->interworking) 195 *pos |= 0x80; /* Bit 31 - Interworking */ 196 break; 197 case 4: /* Bits 32-39 */ 198 if (hapd->conf->qos_map_set_len) 199 *pos |= 0x01; /* Bit 32 - QoS Map */ 200 if (hapd->conf->tdls & TDLS_PROHIBIT) 201 *pos |= 0x40; /* Bit 38 - TDLS Prohibited */ 202 if (hapd->conf->tdls & TDLS_PROHIBIT_CHAN_SWITCH) { 203 /* Bit 39 - TDLS Channel Switching Prohibited */ 204 *pos |= 0x80; 205 } 206 break; 207 case 5: /* Bits 40-47 */ 208 #ifdef CONFIG_HS20 209 if (hapd->conf->hs20) 210 *pos |= 0x40; /* Bit 46 - WNM-Notification */ 211 #endif /* CONFIG_HS20 */ 212 #ifdef CONFIG_MBO 213 if (hapd->conf->mbo_enabled) 214 *pos |= 0x40; /* Bit 46 - WNM-Notification */ 215 #endif /* CONFIG_MBO */ 216 break; 217 case 6: /* Bits 48-55 */ 218 if (hapd->conf->ssid.utf8_ssid) 219 *pos |= 0x01; /* Bit 48 - UTF-8 SSID */ 220 break; 221 } 222 } 223 224 225 u8 * hostapd_eid_ext_capab(struct hostapd_data *hapd, u8 *eid) 226 { 227 u8 *pos = eid; 228 u8 len = 0, i; 229 230 if (hapd->conf->tdls & (TDLS_PROHIBIT | TDLS_PROHIBIT_CHAN_SWITCH)) 231 len = 5; 232 if (len < 4 && hapd->conf->interworking) 233 len = 4; 234 if (len < 3 && hapd->conf->wnm_sleep_mode) 235 len = 3; 236 if (len < 1 && hapd->iconf->obss_interval) 237 len = 1; 238 if (len < 7 && hapd->conf->ssid.utf8_ssid) 239 len = 7; 240 #ifdef CONFIG_WNM 241 if (len < 4) 242 len = 4; 243 #endif /* CONFIG_WNM */ 244 #ifdef CONFIG_HS20 245 if (hapd->conf->hs20 && len < 6) 246 len = 6; 247 #endif /* CONFIG_HS20 */ 248 #ifdef CONFIG_MBO 249 if (hapd->conf->mbo_enabled && len < 6) 250 len = 6; 251 #endif /* CONFIG_MBO */ 252 if (len < hapd->iface->extended_capa_len) 253 len = hapd->iface->extended_capa_len; 254 if (len == 0) 255 return eid; 256 257 *pos++ = WLAN_EID_EXT_CAPAB; 258 *pos++ = len; 259 for (i = 0; i < len; i++, pos++) { 260 hostapd_ext_capab_byte(hapd, pos, i); 261 262 if (i < hapd->iface->extended_capa_len) { 263 *pos &= ~hapd->iface->extended_capa_mask[i]; 264 *pos |= hapd->iface->extended_capa[i]; 265 } 266 } 267 268 while (len > 0 && eid[1 + len] == 0) { 269 len--; 270 eid[1] = len; 271 } 272 if (len == 0) 273 return eid; 274 275 return eid + 2 + len; 276 } 277 278 279 u8 * hostapd_eid_qos_map_set(struct hostapd_data *hapd, u8 *eid) 280 { 281 u8 *pos = eid; 282 u8 len = hapd->conf->qos_map_set_len; 283 284 if (!len) 285 return eid; 286 287 *pos++ = WLAN_EID_QOS_MAP_SET; 288 *pos++ = len; 289 os_memcpy(pos, hapd->conf->qos_map_set, len); 290 pos += len; 291 292 return pos; 293 } 294 295 296 u8 * hostapd_eid_interworking(struct hostapd_data *hapd, u8 *eid) 297 { 298 u8 *pos = eid; 299 #ifdef CONFIG_INTERWORKING 300 u8 *len; 301 302 if (!hapd->conf->interworking) 303 return eid; 304 305 *pos++ = WLAN_EID_INTERWORKING; 306 len = pos++; 307 308 *pos = hapd->conf->access_network_type; 309 if (hapd->conf->internet) 310 *pos |= INTERWORKING_ANO_INTERNET; 311 if (hapd->conf->asra) 312 *pos |= INTERWORKING_ANO_ASRA; 313 if (hapd->conf->esr) 314 *pos |= INTERWORKING_ANO_ESR; 315 if (hapd->conf->uesa) 316 *pos |= INTERWORKING_ANO_UESA; 317 pos++; 318 319 if (hapd->conf->venue_info_set) { 320 *pos++ = hapd->conf->venue_group; 321 *pos++ = hapd->conf->venue_type; 322 } 323 324 if (!is_zero_ether_addr(hapd->conf->hessid)) { 325 os_memcpy(pos, hapd->conf->hessid, ETH_ALEN); 326 pos += ETH_ALEN; 327 } 328 329 *len = pos - len - 1; 330 #endif /* CONFIG_INTERWORKING */ 331 332 return pos; 333 } 334 335 336 u8 * hostapd_eid_adv_proto(struct hostapd_data *hapd, u8 *eid) 337 { 338 u8 *pos = eid; 339 #ifdef CONFIG_INTERWORKING 340 341 /* TODO: Separate configuration for ANQP? */ 342 if (!hapd->conf->interworking) 343 return eid; 344 345 *pos++ = WLAN_EID_ADV_PROTO; 346 *pos++ = 2; 347 *pos++ = 0x7F; /* Query Response Length Limit | PAME-BI */ 348 *pos++ = ACCESS_NETWORK_QUERY_PROTOCOL; 349 #endif /* CONFIG_INTERWORKING */ 350 351 return pos; 352 } 353 354 355 u8 * hostapd_eid_roaming_consortium(struct hostapd_data *hapd, u8 *eid) 356 { 357 u8 *pos = eid; 358 #ifdef CONFIG_INTERWORKING 359 u8 *len; 360 unsigned int i, count; 361 362 if (!hapd->conf->interworking || 363 hapd->conf->roaming_consortium == NULL || 364 hapd->conf->roaming_consortium_count == 0) 365 return eid; 366 367 *pos++ = WLAN_EID_ROAMING_CONSORTIUM; 368 len = pos++; 369 370 /* Number of ANQP OIs (in addition to the max 3 listed here) */ 371 if (hapd->conf->roaming_consortium_count > 3 + 255) 372 *pos++ = 255; 373 else if (hapd->conf->roaming_consortium_count > 3) 374 *pos++ = hapd->conf->roaming_consortium_count - 3; 375 else 376 *pos++ = 0; 377 378 /* OU #1 and #2 Lengths */ 379 *pos = hapd->conf->roaming_consortium[0].len; 380 if (hapd->conf->roaming_consortium_count > 1) 381 *pos |= hapd->conf->roaming_consortium[1].len << 4; 382 pos++; 383 384 if (hapd->conf->roaming_consortium_count > 3) 385 count = 3; 386 else 387 count = hapd->conf->roaming_consortium_count; 388 389 for (i = 0; i < count; i++) { 390 os_memcpy(pos, hapd->conf->roaming_consortium[i].oi, 391 hapd->conf->roaming_consortium[i].len); 392 pos += hapd->conf->roaming_consortium[i].len; 393 } 394 395 *len = pos - len - 1; 396 #endif /* CONFIG_INTERWORKING */ 397 398 return pos; 399 } 400 401 402 u8 * hostapd_eid_time_adv(struct hostapd_data *hapd, u8 *eid) 403 { 404 if (hapd->conf->time_advertisement != 2) 405 return eid; 406 407 if (hapd->time_adv == NULL && 408 hostapd_update_time_adv(hapd) < 0) 409 return eid; 410 411 if (hapd->time_adv == NULL) 412 return eid; 413 414 os_memcpy(eid, wpabuf_head(hapd->time_adv), 415 wpabuf_len(hapd->time_adv)); 416 eid += wpabuf_len(hapd->time_adv); 417 418 return eid; 419 } 420 421 422 u8 * hostapd_eid_time_zone(struct hostapd_data *hapd, u8 *eid) 423 { 424 size_t len; 425 426 if (hapd->conf->time_advertisement != 2) 427 return eid; 428 429 len = os_strlen(hapd->conf->time_zone); 430 431 *eid++ = WLAN_EID_TIME_ZONE; 432 *eid++ = len; 433 os_memcpy(eid, hapd->conf->time_zone, len); 434 eid += len; 435 436 return eid; 437 } 438 439 440 int hostapd_update_time_adv(struct hostapd_data *hapd) 441 { 442 const int elen = 2 + 1 + 10 + 5 + 1; 443 struct os_time t; 444 struct os_tm tm; 445 u8 *pos; 446 447 if (hapd->conf->time_advertisement != 2) 448 return 0; 449 450 if (os_get_time(&t) < 0 || os_gmtime(t.sec, &tm) < 0) 451 return -1; 452 453 if (!hapd->time_adv) { 454 hapd->time_adv = wpabuf_alloc(elen); 455 if (hapd->time_adv == NULL) 456 return -1; 457 pos = wpabuf_put(hapd->time_adv, elen); 458 } else 459 pos = wpabuf_mhead_u8(hapd->time_adv); 460 461 *pos++ = WLAN_EID_TIME_ADVERTISEMENT; 462 *pos++ = 1 + 10 + 5 + 1; 463 464 *pos++ = 2; /* UTC time at which the TSF timer is 0 */ 465 466 /* Time Value at TSF 0 */ 467 /* FIX: need to calculate this based on the current TSF value */ 468 WPA_PUT_LE16(pos, tm.year); /* Year */ 469 pos += 2; 470 *pos++ = tm.month; /* Month */ 471 *pos++ = tm.day; /* Day of month */ 472 *pos++ = tm.hour; /* Hours */ 473 *pos++ = tm.min; /* Minutes */ 474 *pos++ = tm.sec; /* Seconds */ 475 WPA_PUT_LE16(pos, 0); /* Milliseconds (not used) */ 476 pos += 2; 477 *pos++ = 0; /* Reserved */ 478 479 /* Time Error */ 480 /* TODO: fill in an estimate on the error */ 481 *pos++ = 0; 482 *pos++ = 0; 483 *pos++ = 0; 484 *pos++ = 0; 485 *pos++ = 0; 486 487 *pos++ = hapd->time_update_counter++; 488 489 return 0; 490 } 491 492 493 u8 * hostapd_eid_bss_max_idle_period(struct hostapd_data *hapd, u8 *eid) 494 { 495 u8 *pos = eid; 496 497 #ifdef CONFIG_WNM 498 if (hapd->conf->ap_max_inactivity > 0) { 499 unsigned int val; 500 *pos++ = WLAN_EID_BSS_MAX_IDLE_PERIOD; 501 *pos++ = 3; 502 val = hapd->conf->ap_max_inactivity; 503 if (val > 68000) 504 val = 68000; 505 val *= 1000; 506 val /= 1024; 507 if (val == 0) 508 val = 1; 509 if (val > 65535) 510 val = 65535; 511 WPA_PUT_LE16(pos, val); 512 pos += 2; 513 *pos++ = 0x00; /* TODO: Protected Keep-Alive Required */ 514 } 515 #endif /* CONFIG_WNM */ 516 517 return pos; 518 } 519 520 521 #ifdef CONFIG_MBO 522 523 u8 * hostapd_eid_mbo(struct hostapd_data *hapd, u8 *eid, size_t len) 524 { 525 u8 mbo[6], *mbo_pos = mbo; 526 u8 *pos = eid; 527 528 if (!hapd->conf->mbo_enabled) 529 return eid; 530 531 *mbo_pos++ = MBO_ATTR_ID_AP_CAPA_IND; 532 *mbo_pos++ = 1; 533 /* Not Cellular aware */ 534 *mbo_pos++ = 0; 535 536 if (hapd->mbo_assoc_disallow) { 537 *mbo_pos++ = MBO_ATTR_ID_ASSOC_DISALLOW; 538 *mbo_pos++ = 1; 539 *mbo_pos++ = hapd->mbo_assoc_disallow; 540 } 541 542 pos += mbo_add_ie(pos, len, mbo, mbo_pos - mbo); 543 544 return pos; 545 } 546 547 548 u8 hostapd_mbo_ie_len(struct hostapd_data *hapd) 549 { 550 if (!hapd->conf->mbo_enabled) 551 return 0; 552 553 /* 554 * MBO IE header (6) + Capability Indication attribute (3) + 555 * Association Disallowed attribute (3) = 12 556 */ 557 return 6 + 3 + (hapd->mbo_assoc_disallow ? 3 : 0); 558 } 559 560 #endif /* CONFIG_MBO */ 561 562 563 void ap_copy_sta_supp_op_classes(struct sta_info *sta, 564 const u8 *supp_op_classes, 565 size_t supp_op_classes_len) 566 { 567 if (!supp_op_classes) 568 return; 569 os_free(sta->supp_op_classes); 570 sta->supp_op_classes = os_malloc(1 + supp_op_classes_len); 571 if (!sta->supp_op_classes) 572 return; 573 574 sta->supp_op_classes[0] = supp_op_classes_len; 575 os_memcpy(sta->supp_op_classes + 1, supp_op_classes, 576 supp_op_classes_len); 577 } 578
