ieee802_11_shared.c revision 281806
1/* 2 * hostapd / IEEE 802.11 Management 3 * Copyright (c) 2002-2012, Jouni Malinen <j@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 22u8 * 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 */ 49void 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 76static 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 114void 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 167static 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 if (hapd->conf->proxy_arp) 178 *pos |= 0x10; /* Bit 12 - Proxy ARP */ 179 break; 180 case 2: /* Bits 16-23 */ 181 if (hapd->conf->wnm_sleep_mode) 182 *pos |= 0x02; /* Bit 17 - WNM-Sleep Mode */ 183 if (hapd->conf->bss_transition) 184 *pos |= 0x08; /* Bit 19 - BSS Transition */ 185 break; 186 case 3: /* Bits 24-31 */ 187#ifdef CONFIG_WNM 188 *pos |= 0x02; /* Bit 25 - SSID List */ 189#endif /* CONFIG_WNM */ 190 if (hapd->conf->time_advertisement == 2) 191 *pos |= 0x08; /* Bit 27 - UTC TSF Offset */ 192 if (hapd->conf->interworking) 193 *pos |= 0x80; /* Bit 31 - Interworking */ 194 break; 195 case 4: /* Bits 32-39 */ 196 if (hapd->conf->qos_map_set_len) 197 *pos |= 0x01; /* Bit 32 - QoS Map */ 198 if (hapd->conf->tdls & TDLS_PROHIBIT) 199 *pos |= 0x40; /* Bit 38 - TDLS Prohibited */ 200 if (hapd->conf->tdls & TDLS_PROHIBIT_CHAN_SWITCH) { 201 /* Bit 39 - TDLS Channel Switching Prohibited */ 202 *pos |= 0x80; 203 } 204 break; 205 case 5: /* Bits 40-47 */ 206#ifdef CONFIG_HS20 207 if (hapd->conf->hs20) 208 *pos |= 0x40; /* Bit 46 - WNM-Notification */ 209#endif /* CONFIG_HS20 */ 210 break; 211 case 6: /* Bits 48-55 */ 212 if (hapd->conf->ssid.utf8_ssid) 213 *pos |= 0x01; /* Bit 48 - UTF-8 SSID */ 214 break; 215 } 216} 217 218 219u8 * hostapd_eid_ext_capab(struct hostapd_data *hapd, u8 *eid) 220{ 221 u8 *pos = eid; 222 u8 len = 0, i; 223 224 if (hapd->conf->tdls & (TDLS_PROHIBIT | TDLS_PROHIBIT_CHAN_SWITCH)) 225 len = 5; 226 if (len < 4 && hapd->conf->interworking) 227 len = 4; 228 if (len < 3 && hapd->conf->wnm_sleep_mode) 229 len = 3; 230 if (len < 1 && hapd->iconf->obss_interval) 231 len = 1; 232 if (len < 7 && hapd->conf->ssid.utf8_ssid) 233 len = 7; 234#ifdef CONFIG_WNM 235 if (len < 4) 236 len = 4; 237#endif /* CONFIG_WNM */ 238#ifdef CONFIG_HS20 239 if (hapd->conf->hs20 && len < 6) 240 len = 6; 241#endif /* CONFIG_HS20 */ 242 if (len < hapd->iface->extended_capa_len) 243 len = hapd->iface->extended_capa_len; 244 if (len == 0) 245 return eid; 246 247 *pos++ = WLAN_EID_EXT_CAPAB; 248 *pos++ = len; 249 for (i = 0; i < len; i++, pos++) { 250 hostapd_ext_capab_byte(hapd, pos, i); 251 252 if (i < hapd->iface->extended_capa_len) { 253 *pos &= ~hapd->iface->extended_capa_mask[i]; 254 *pos |= hapd->iface->extended_capa[i]; 255 } 256 } 257 258 while (len > 0 && eid[1 + len] == 0) { 259 len--; 260 eid[1] = len; 261 } 262 if (len == 0) 263 return eid; 264 265 return eid + 2 + len; 266} 267 268 269u8 * hostapd_eid_qos_map_set(struct hostapd_data *hapd, u8 *eid) 270{ 271 u8 *pos = eid; 272 u8 len = hapd->conf->qos_map_set_len; 273 274 if (!len) 275 return eid; 276 277 *pos++ = WLAN_EID_QOS_MAP_SET; 278 *pos++ = len; 279 os_memcpy(pos, hapd->conf->qos_map_set, len); 280 pos += len; 281 282 return pos; 283} 284 285 286u8 * hostapd_eid_interworking(struct hostapd_data *hapd, u8 *eid) 287{ 288 u8 *pos = eid; 289#ifdef CONFIG_INTERWORKING 290 u8 *len; 291 292 if (!hapd->conf->interworking) 293 return eid; 294 295 *pos++ = WLAN_EID_INTERWORKING; 296 len = pos++; 297 298 *pos = hapd->conf->access_network_type; 299 if (hapd->conf->internet) 300 *pos |= INTERWORKING_ANO_INTERNET; 301 if (hapd->conf->asra) 302 *pos |= INTERWORKING_ANO_ASRA; 303 if (hapd->conf->esr) 304 *pos |= INTERWORKING_ANO_ESR; 305 if (hapd->conf->uesa) 306 *pos |= INTERWORKING_ANO_UESA; 307 pos++; 308 309 if (hapd->conf->venue_info_set) { 310 *pos++ = hapd->conf->venue_group; 311 *pos++ = hapd->conf->venue_type; 312 } 313 314 if (!is_zero_ether_addr(hapd->conf->hessid)) { 315 os_memcpy(pos, hapd->conf->hessid, ETH_ALEN); 316 pos += ETH_ALEN; 317 } 318 319 *len = pos - len - 1; 320#endif /* CONFIG_INTERWORKING */ 321 322 return pos; 323} 324 325 326u8 * hostapd_eid_adv_proto(struct hostapd_data *hapd, u8 *eid) 327{ 328 u8 *pos = eid; 329#ifdef CONFIG_INTERWORKING 330 331 /* TODO: Separate configuration for ANQP? */ 332 if (!hapd->conf->interworking) 333 return eid; 334 335 *pos++ = WLAN_EID_ADV_PROTO; 336 *pos++ = 2; 337 *pos++ = 0x7F; /* Query Response Length Limit | PAME-BI */ 338 *pos++ = ACCESS_NETWORK_QUERY_PROTOCOL; 339#endif /* CONFIG_INTERWORKING */ 340 341 return pos; 342} 343 344 345u8 * hostapd_eid_roaming_consortium(struct hostapd_data *hapd, u8 *eid) 346{ 347 u8 *pos = eid; 348#ifdef CONFIG_INTERWORKING 349 u8 *len; 350 unsigned int i, count; 351 352 if (!hapd->conf->interworking || 353 hapd->conf->roaming_consortium == NULL || 354 hapd->conf->roaming_consortium_count == 0) 355 return eid; 356 357 *pos++ = WLAN_EID_ROAMING_CONSORTIUM; 358 len = pos++; 359 360 /* Number of ANQP OIs (in addition to the max 3 listed here) */ 361 if (hapd->conf->roaming_consortium_count > 3 + 255) 362 *pos++ = 255; 363 else if (hapd->conf->roaming_consortium_count > 3) 364 *pos++ = hapd->conf->roaming_consortium_count - 3; 365 else 366 *pos++ = 0; 367 368 /* OU #1 and #2 Lengths */ 369 *pos = hapd->conf->roaming_consortium[0].len; 370 if (hapd->conf->roaming_consortium_count > 1) 371 *pos |= hapd->conf->roaming_consortium[1].len << 4; 372 pos++; 373 374 if (hapd->conf->roaming_consortium_count > 3) 375 count = 3; 376 else 377 count = hapd->conf->roaming_consortium_count; 378 379 for (i = 0; i < count; i++) { 380 os_memcpy(pos, hapd->conf->roaming_consortium[i].oi, 381 hapd->conf->roaming_consortium[i].len); 382 pos += hapd->conf->roaming_consortium[i].len; 383 } 384 385 *len = pos - len - 1; 386#endif /* CONFIG_INTERWORKING */ 387 388 return pos; 389} 390 391 392u8 * hostapd_eid_time_adv(struct hostapd_data *hapd, u8 *eid) 393{ 394 if (hapd->conf->time_advertisement != 2) 395 return eid; 396 397 if (hapd->time_adv == NULL && 398 hostapd_update_time_adv(hapd) < 0) 399 return eid; 400 401 if (hapd->time_adv == NULL) 402 return eid; 403 404 os_memcpy(eid, wpabuf_head(hapd->time_adv), 405 wpabuf_len(hapd->time_adv)); 406 eid += wpabuf_len(hapd->time_adv); 407 408 return eid; 409} 410 411 412u8 * hostapd_eid_time_zone(struct hostapd_data *hapd, u8 *eid) 413{ 414 size_t len; 415 416 if (hapd->conf->time_advertisement != 2) 417 return eid; 418 419 len = os_strlen(hapd->conf->time_zone); 420 421 *eid++ = WLAN_EID_TIME_ZONE; 422 *eid++ = len; 423 os_memcpy(eid, hapd->conf->time_zone, len); 424 eid += len; 425 426 return eid; 427} 428 429 430int hostapd_update_time_adv(struct hostapd_data *hapd) 431{ 432 const int elen = 2 + 1 + 10 + 5 + 1; 433 struct os_time t; 434 struct os_tm tm; 435 u8 *pos; 436 437 if (hapd->conf->time_advertisement != 2) 438 return 0; 439 440 if (os_get_time(&t) < 0 || os_gmtime(t.sec, &tm) < 0) 441 return -1; 442 443 if (!hapd->time_adv) { 444 hapd->time_adv = wpabuf_alloc(elen); 445 if (hapd->time_adv == NULL) 446 return -1; 447 pos = wpabuf_put(hapd->time_adv, elen); 448 } else 449 pos = wpabuf_mhead_u8(hapd->time_adv); 450 451 *pos++ = WLAN_EID_TIME_ADVERTISEMENT; 452 *pos++ = 1 + 10 + 5 + 1; 453 454 *pos++ = 2; /* UTC time at which the TSF timer is 0 */ 455 456 /* Time Value at TSF 0 */ 457 /* FIX: need to calculate this based on the current TSF value */ 458 WPA_PUT_LE16(pos, tm.year); /* Year */ 459 pos += 2; 460 *pos++ = tm.month; /* Month */ 461 *pos++ = tm.day; /* Day of month */ 462 *pos++ = tm.hour; /* Hours */ 463 *pos++ = tm.min; /* Minutes */ 464 *pos++ = tm.sec; /* Seconds */ 465 WPA_PUT_LE16(pos, 0); /* Milliseconds (not used) */ 466 pos += 2; 467 *pos++ = 0; /* Reserved */ 468 469 /* Time Error */ 470 /* TODO: fill in an estimate on the error */ 471 *pos++ = 0; 472 *pos++ = 0; 473 *pos++ = 0; 474 *pos++ = 0; 475 *pos++ = 0; 476 477 *pos++ = hapd->time_update_counter++; 478 479 return 0; 480} 481 482 483u8 * hostapd_eid_bss_max_idle_period(struct hostapd_data *hapd, u8 *eid) 484{ 485 u8 *pos = eid; 486 487#ifdef CONFIG_WNM 488 if (hapd->conf->ap_max_inactivity > 0) { 489 unsigned int val; 490 *pos++ = WLAN_EID_BSS_MAX_IDLE_PERIOD; 491 *pos++ = 3; 492 val = hapd->conf->ap_max_inactivity; 493 if (val > 68000) 494 val = 68000; 495 val *= 1000; 496 val /= 1024; 497 if (val == 0) 498 val = 1; 499 if (val > 65535) 500 val = 65535; 501 WPA_PUT_LE16(pos, val); 502 pos += 2; 503 *pos++ = 0x00; /* TODO: Protected Keep-Alive Required */ 504 } 505#endif /* CONFIG_WNM */ 506 507 return pos; 508} 509