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 break; 176 case 1: /* Bits 8-15 */ 177 break; 178 case 2: /* Bits 16-23 */ 179 if (hapd->conf->wnm_sleep_mode) 180 *pos |= 0x02; /* Bit 17 - WNM-Sleep Mode */ 181 if (hapd->conf->bss_transition) 182 *pos |= 0x08; /* Bit 19 - BSS Transition */ 183 break; 184 case 3: /* Bits 24-31 */ 185 #ifdef CONFIG_WNM 186 *pos |= 0x02; /* Bit 25 - SSID List */ 187 #endif /* CONFIG_WNM */ 188 if (hapd->conf->time_advertisement == 2) 189 *pos |= 0x08; /* Bit 27 - UTC TSF Offset */ 190 if (hapd->conf->interworking) 191 *pos |= 0x80; /* Bit 31 - Interworking */ 192 break; 193 case 4: /* Bits 32-39 */ 194 if (hapd->conf->qos_map_set_len) 195 *pos |= 0x01; /* Bit 32 - QoS Map */ 196 if (hapd->conf->tdls & TDLS_PROHIBIT) 197 *pos |= 0x40; /* Bit 38 - TDLS Prohibited */ 198 if (hapd->conf->tdls & TDLS_PROHIBIT_CHAN_SWITCH) { 199 /* Bit 39 - TDLS Channel Switching Prohibited */ 200 *pos |= 0x80; 201 } 202 break; 203 case 5: /* Bits 40-47 */ 204 #ifdef CONFIG_HS20 205 if (hapd->conf->hs20) 206 *pos |= 0x40; /* Bit 46 - WNM-Notification */ 207 #endif /* CONFIG_HS20 */ 208 break; 209 case 6: /* Bits 48-55 */ 210 if (hapd->conf->ssid.utf8_ssid) 211 *pos |= 0x01; /* Bit 48 - UTF-8 SSID */ 212 break; 213 } 214 } 215 216 217 u8 * hostapd_eid_ext_capab(struct hostapd_data *hapd, u8 *eid) 218 { 219 u8 *pos = eid; 220 u8 len = 0, i; 221 222 if (hapd->conf->tdls & (TDLS_PROHIBIT | TDLS_PROHIBIT_CHAN_SWITCH)) 223 len = 5; 224 if (len < 4 && hapd->conf->interworking) 225 len = 4; 226 if (len < 3 && hapd->conf->wnm_sleep_mode) 227 len = 3; 228 if (len < 1 && hapd->iconf->obss_interval) 229 len = 1; 230 if (len < 7 && hapd->conf->ssid.utf8_ssid) 231 len = 7; 232 #ifdef CONFIG_WNM 233 if (len < 4) 234 len = 4; 235 #endif /* CONFIG_WNM */ 236 #ifdef CONFIG_HS20 237 if (hapd->conf->hs20 && len < 6) 238 len = 6; 239 #endif /* CONFIG_HS20 */ 240 if (len < hapd->iface->extended_capa_len) 241 len = hapd->iface->extended_capa_len; 242 if (len == 0) 243 return eid; 244 245 *pos++ = WLAN_EID_EXT_CAPAB; 246 *pos++ = len; 247 for (i = 0; i < len; i++, pos++) { 248 hostapd_ext_capab_byte(hapd, pos, i); 249 250 if (i < hapd->iface->extended_capa_len) { 251 *pos &= ~hapd->iface->extended_capa_mask[i]; 252 *pos |= hapd->iface->extended_capa[i]; 253 } 254 } 255 256 while (len > 0 && eid[1 + len] == 0) { 257 len--; 258 eid[1] = len; 259 } 260 if (len == 0) 261 return eid; 262 263 return eid + 2 + len; 264 } 265 266 267 u8 * hostapd_eid_qos_map_set(struct hostapd_data *hapd, u8 *eid) 268 { 269 u8 *pos = eid; 270 u8 len = hapd->conf->qos_map_set_len; 271 272 if (!len) 273 return eid; 274 275 *pos++ = WLAN_EID_QOS_MAP_SET; 276 *pos++ = len; 277 os_memcpy(pos, hapd->conf->qos_map_set, len); 278 pos += len; 279 280 return pos; 281 } 282 283 284 u8 * hostapd_eid_interworking(struct hostapd_data *hapd, u8 *eid) 285 { 286 u8 *pos = eid; 287 #ifdef CONFIG_INTERWORKING 288 u8 *len; 289 290 if (!hapd->conf->interworking) 291 return eid; 292 293 *pos++ = WLAN_EID_INTERWORKING; 294 len = pos++; 295 296 *pos = hapd->conf->access_network_type; 297 if (hapd->conf->internet) 298 *pos |= INTERWORKING_ANO_INTERNET; 299 if (hapd->conf->asra) 300 *pos |= INTERWORKING_ANO_ASRA; 301 if (hapd->conf->esr) 302 *pos |= INTERWORKING_ANO_ESR; 303 if (hapd->conf->uesa) 304 *pos |= INTERWORKING_ANO_UESA; 305 pos++; 306 307 if (hapd->conf->venue_info_set) { 308 *pos++ = hapd->conf->venue_group; 309 *pos++ = hapd->conf->venue_type; 310 } 311 312 if (!is_zero_ether_addr(hapd->conf->hessid)) { 313 os_memcpy(pos, hapd->conf->hessid, ETH_ALEN); 314 pos += ETH_ALEN; 315 } 316 317 *len = pos - len - 1; 318 #endif /* CONFIG_INTERWORKING */ 319 320 return pos; 321 } 322 323 324 u8 * hostapd_eid_adv_proto(struct hostapd_data *hapd, u8 *eid) 325 { 326 u8 *pos = eid; 327 #ifdef CONFIG_INTERWORKING 328 329 /* TODO: Separate configuration for ANQP? */ 330 if (!hapd->conf->interworking) 331 return eid; 332 333 *pos++ = WLAN_EID_ADV_PROTO; 334 *pos++ = 2; 335 *pos++ = 0x7F; /* Query Response Length Limit | PAME-BI */ 336 *pos++ = ACCESS_NETWORK_QUERY_PROTOCOL; 337 #endif /* CONFIG_INTERWORKING */ 338 339 return pos; 340 } 341 342 343 u8 * hostapd_eid_roaming_consortium(struct hostapd_data *hapd, u8 *eid) 344 { 345 u8 *pos = eid; 346 #ifdef CONFIG_INTERWORKING 347 u8 *len; 348 unsigned int i, count; 349 350 if (!hapd->conf->interworking || 351 hapd->conf->roaming_consortium == NULL || 352 hapd->conf->roaming_consortium_count == 0) 353 return eid; 354 355 *pos++ = WLAN_EID_ROAMING_CONSORTIUM; 356 len = pos++; 357 358 /* Number of ANQP OIs (in addition to the max 3 listed here) */ 359 if (hapd->conf->roaming_consortium_count > 3 + 255) 360 *pos++ = 255; 361 else if (hapd->conf->roaming_consortium_count > 3) 362 *pos++ = hapd->conf->roaming_consortium_count - 3; 363 else 364 *pos++ = 0; 365 366 /* OU #1 and #2 Lengths */ 367 *pos = hapd->conf->roaming_consortium[0].len; 368 if (hapd->conf->roaming_consortium_count > 1) 369 *pos |= hapd->conf->roaming_consortium[1].len << 4; 370 pos++; 371 372 if (hapd->conf->roaming_consortium_count > 3) 373 count = 3; 374 else 375 count = hapd->conf->roaming_consortium_count; 376 377 for (i = 0; i < count; i++) { 378 os_memcpy(pos, hapd->conf->roaming_consortium[i].oi, 379 hapd->conf->roaming_consortium[i].len); 380 pos += hapd->conf->roaming_consortium[i].len; 381 } 382 383 *len = pos - len - 1; 384 #endif /* CONFIG_INTERWORKING */ 385 386 return pos; 387 } 388 389 390 u8 * hostapd_eid_time_adv(struct hostapd_data *hapd, u8 *eid) 391 { 392 if (hapd->conf->time_advertisement != 2) 393 return eid; 394 395 if (hapd->time_adv == NULL && 396 hostapd_update_time_adv(hapd) < 0) 397 return eid; 398 399 if (hapd->time_adv == NULL) 400 return eid; 401 402 os_memcpy(eid, wpabuf_head(hapd->time_adv), 403 wpabuf_len(hapd->time_adv)); 404 eid += wpabuf_len(hapd->time_adv); 405 406 return eid; 407 } 408 409 410 u8 * hostapd_eid_time_zone(struct hostapd_data *hapd, u8 *eid) 411 { 412 size_t len; 413 414 if (hapd->conf->time_advertisement != 2) 415 return eid; 416 417 len = os_strlen(hapd->conf->time_zone); 418 419 *eid++ = WLAN_EID_TIME_ZONE; 420 *eid++ = len; 421 os_memcpy(eid, hapd->conf->time_zone, len); 422 eid += len; 423 424 return eid; 425 } 426 427 428 int hostapd_update_time_adv(struct hostapd_data *hapd) 429 { 430 const int elen = 2 + 1 + 10 + 5 + 1; 431 struct os_time t; 432 struct os_tm tm; 433 u8 *pos; 434 435 if (hapd->conf->time_advertisement != 2) 436 return 0; 437 438 if (os_get_time(&t) < 0 || os_gmtime(t.sec, &tm) < 0) 439 return -1; 440 441 if (!hapd->time_adv) { 442 hapd->time_adv = wpabuf_alloc(elen); 443 if (hapd->time_adv == NULL) 444 return -1; 445 pos = wpabuf_put(hapd->time_adv, elen); 446 } else 447 pos = wpabuf_mhead_u8(hapd->time_adv); 448 449 *pos++ = WLAN_EID_TIME_ADVERTISEMENT; 450 *pos++ = 1 + 10 + 5 + 1; 451 452 *pos++ = 2; /* UTC time at which the TSF timer is 0 */ 453 454 /* Time Value at TSF 0 */ 455 /* FIX: need to calculate this based on the current TSF value */ 456 WPA_PUT_LE16(pos, tm.year); /* Year */ 457 pos += 2; 458 *pos++ = tm.month; /* Month */ 459 *pos++ = tm.day; /* Day of month */ 460 *pos++ = tm.hour; /* Hours */ 461 *pos++ = tm.min; /* Minutes */ 462 *pos++ = tm.sec; /* Seconds */ 463 WPA_PUT_LE16(pos, 0); /* Milliseconds (not used) */ 464 pos += 2; 465 *pos++ = 0; /* Reserved */ 466 467 /* Time Error */ 468 /* TODO: fill in an estimate on the error */ 469 *pos++ = 0; 470 *pos++ = 0; 471 *pos++ = 0; 472 *pos++ = 0; 473 *pos++ = 0; 474 475 *pos++ = hapd->time_update_counter++; 476 477 return 0; 478 } 479 480 481 u8 * hostapd_eid_bss_max_idle_period(struct hostapd_data *hapd, u8 *eid) 482 { 483 u8 *pos = eid; 484 485 #ifdef CONFIG_WNM 486 if (hapd->conf->ap_max_inactivity > 0) { 487 unsigned int val; 488 *pos++ = WLAN_EID_BSS_MAX_IDLE_PERIOD; 489 *pos++ = 3; 490 val = hapd->conf->ap_max_inactivity; 491 if (val > 68000) 492 val = 68000; 493 val *= 1000; 494 val /= 1024; 495 if (val == 0) 496 val = 1; 497 if (val > 65535) 498 val = 65535; 499 WPA_PUT_LE16(pos, val); 500 pos += 2; 501 *pos++ = 0x00; /* TODO: Protected Keep-Alive Required */ 502 } 503 #endif /* CONFIG_WNM */ 504 505 return pos; 506 } 507
