ieee802_11_shared.c revision f21452aea786ac056eb01f1cbba4f553bd502747
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 break; 174 case 1: /* Bits 8-15 */ 175 break; 176 case 2: /* Bits 16-23 */ 177 if (hapd->conf->wnm_sleep_mode) 178 *pos |= 0x02; /* Bit 17 - WNM-Sleep Mode */ 179 if (hapd->conf->bss_transition) 180 *pos |= 0x08; /* Bit 19 - BSS Transition */ 181 break; 182 case 3: /* Bits 24-31 */ 183#ifdef CONFIG_WNM 184 *pos |= 0x02; /* Bit 25 - SSID List */ 185#endif /* CONFIG_WNM */ 186 if (hapd->conf->time_advertisement == 2) 187 *pos |= 0x08; /* Bit 27 - UTC TSF Offset */ 188 if (hapd->conf->interworking) 189 *pos |= 0x80; /* Bit 31 - Interworking */ 190 break; 191 case 4: /* Bits 32-39 */ 192 if (hapd->conf->qos_map_set_len) 193 *pos |= 0x01; /* Bit 32 - QoS Map */ 194 if (hapd->conf->tdls & TDLS_PROHIBIT) 195 *pos |= 0x40; /* Bit 38 - TDLS Prohibited */ 196 if (hapd->conf->tdls & TDLS_PROHIBIT_CHAN_SWITCH) { 197 /* Bit 39 - TDLS Channel Switching Prohibited */ 198 *pos |= 0x80; 199 } 200 break; 201 case 5: /* Bits 40-47 */ 202#ifdef CONFIG_HS20 203 if (hapd->conf->hs20) 204 *pos |= 0x40; /* Bit 46 - WNM-Notification */ 205#endif /* CONFIG_HS20 */ 206 break; 207 case 6: /* Bits 48-55 */ 208 if (hapd->conf->ssid.utf8_ssid) 209 *pos |= 0x01; /* Bit 48 - UTF-8 SSID */ 210 break; 211 } 212} 213 214 215u8 * hostapd_eid_ext_capab(struct hostapd_data *hapd, u8 *eid) 216{ 217 u8 *pos = eid; 218 u8 len = 0, i; 219 220 if (hapd->conf->tdls & (TDLS_PROHIBIT | TDLS_PROHIBIT_CHAN_SWITCH)) 221 len = 5; 222 if (len < 4 && hapd->conf->interworking) 223 len = 4; 224 if (len < 3 && hapd->conf->wnm_sleep_mode) 225 len = 3; 226 if (len < 7 && hapd->conf->ssid.utf8_ssid) 227 len = 7; 228#ifdef CONFIG_WNM 229 if (len < 4) 230 len = 4; 231#endif /* CONFIG_WNM */ 232#ifdef CONFIG_HS20 233 if (hapd->conf->hs20 && len < 6) 234 len = 6; 235#endif /* CONFIG_HS20 */ 236 if (len < hapd->iface->extended_capa_len) 237 len = hapd->iface->extended_capa_len; 238 if (len == 0) 239 return eid; 240 241 *pos++ = WLAN_EID_EXT_CAPAB; 242 *pos++ = len; 243 for (i = 0; i < len; i++, pos++) { 244 hostapd_ext_capab_byte(hapd, pos, i); 245 246 if (i < hapd->iface->extended_capa_len) { 247 *pos &= ~hapd->iface->extended_capa_mask[i]; 248 *pos |= hapd->iface->extended_capa[i]; 249 } 250 } 251 252 while (len > 0 && eid[1 + len] == 0) { 253 len--; 254 eid[1] = len; 255 } 256 if (len == 0) 257 return eid; 258 259 return eid + 2 + len; 260} 261 262 263u8 * hostapd_eid_qos_map_set(struct hostapd_data *hapd, u8 *eid) 264{ 265 u8 *pos = eid; 266 u8 len = hapd->conf->qos_map_set_len; 267 268 if (!len) 269 return eid; 270 271 *pos++ = WLAN_EID_QOS_MAP_SET; 272 *pos++ = len; 273 os_memcpy(pos, hapd->conf->qos_map_set, len); 274 pos += len; 275 276 return pos; 277} 278 279 280u8 * hostapd_eid_interworking(struct hostapd_data *hapd, u8 *eid) 281{ 282 u8 *pos = eid; 283#ifdef CONFIG_INTERWORKING 284 u8 *len; 285 286 if (!hapd->conf->interworking) 287 return eid; 288 289 *pos++ = WLAN_EID_INTERWORKING; 290 len = pos++; 291 292 *pos = hapd->conf->access_network_type; 293 if (hapd->conf->internet) 294 *pos |= INTERWORKING_ANO_INTERNET; 295 if (hapd->conf->asra) 296 *pos |= INTERWORKING_ANO_ASRA; 297 if (hapd->conf->esr) 298 *pos |= INTERWORKING_ANO_ESR; 299 if (hapd->conf->uesa) 300 *pos |= INTERWORKING_ANO_UESA; 301 pos++; 302 303 if (hapd->conf->venue_info_set) { 304 *pos++ = hapd->conf->venue_group; 305 *pos++ = hapd->conf->venue_type; 306 } 307 308 if (!is_zero_ether_addr(hapd->conf->hessid)) { 309 os_memcpy(pos, hapd->conf->hessid, ETH_ALEN); 310 pos += ETH_ALEN; 311 } 312 313 *len = pos - len - 1; 314#endif /* CONFIG_INTERWORKING */ 315 316 return pos; 317} 318 319 320u8 * hostapd_eid_adv_proto(struct hostapd_data *hapd, u8 *eid) 321{ 322 u8 *pos = eid; 323#ifdef CONFIG_INTERWORKING 324 325 /* TODO: Separate configuration for ANQP? */ 326 if (!hapd->conf->interworking) 327 return eid; 328 329 *pos++ = WLAN_EID_ADV_PROTO; 330 *pos++ = 2; 331 *pos++ = 0x7F; /* Query Response Length Limit | PAME-BI */ 332 *pos++ = ACCESS_NETWORK_QUERY_PROTOCOL; 333#endif /* CONFIG_INTERWORKING */ 334 335 return pos; 336} 337 338 339u8 * hostapd_eid_roaming_consortium(struct hostapd_data *hapd, u8 *eid) 340{ 341 u8 *pos = eid; 342#ifdef CONFIG_INTERWORKING 343 u8 *len; 344 unsigned int i, count; 345 346 if (!hapd->conf->interworking || 347 hapd->conf->roaming_consortium == NULL || 348 hapd->conf->roaming_consortium_count == 0) 349 return eid; 350 351 *pos++ = WLAN_EID_ROAMING_CONSORTIUM; 352 len = pos++; 353 354 /* Number of ANQP OIs (in addition to the max 3 listed here) */ 355 if (hapd->conf->roaming_consortium_count > 3 + 255) 356 *pos++ = 255; 357 else if (hapd->conf->roaming_consortium_count > 3) 358 *pos++ = hapd->conf->roaming_consortium_count - 3; 359 else 360 *pos++ = 0; 361 362 /* OU #1 and #2 Lengths */ 363 *pos = hapd->conf->roaming_consortium[0].len; 364 if (hapd->conf->roaming_consortium_count > 1) 365 *pos |= hapd->conf->roaming_consortium[1].len << 4; 366 pos++; 367 368 if (hapd->conf->roaming_consortium_count > 3) 369 count = 3; 370 else 371 count = hapd->conf->roaming_consortium_count; 372 373 for (i = 0; i < count; i++) { 374 os_memcpy(pos, hapd->conf->roaming_consortium[i].oi, 375 hapd->conf->roaming_consortium[i].len); 376 pos += hapd->conf->roaming_consortium[i].len; 377 } 378 379 *len = pos - len - 1; 380#endif /* CONFIG_INTERWORKING */ 381 382 return pos; 383} 384 385 386u8 * hostapd_eid_time_adv(struct hostapd_data *hapd, u8 *eid) 387{ 388 if (hapd->conf->time_advertisement != 2) 389 return eid; 390 391 if (hapd->time_adv == NULL && 392 hostapd_update_time_adv(hapd) < 0) 393 return eid; 394 395 if (hapd->time_adv == NULL) 396 return eid; 397 398 os_memcpy(eid, wpabuf_head(hapd->time_adv), 399 wpabuf_len(hapd->time_adv)); 400 eid += wpabuf_len(hapd->time_adv); 401 402 return eid; 403} 404 405 406u8 * hostapd_eid_time_zone(struct hostapd_data *hapd, u8 *eid) 407{ 408 size_t len; 409 410 if (hapd->conf->time_advertisement != 2) 411 return eid; 412 413 len = os_strlen(hapd->conf->time_zone); 414 415 *eid++ = WLAN_EID_TIME_ZONE; 416 *eid++ = len; 417 os_memcpy(eid, hapd->conf->time_zone, len); 418 eid += len; 419 420 return eid; 421} 422 423 424int hostapd_update_time_adv(struct hostapd_data *hapd) 425{ 426 const int elen = 2 + 1 + 10 + 5 + 1; 427 struct os_time t; 428 struct os_tm tm; 429 u8 *pos; 430 431 if (hapd->conf->time_advertisement != 2) 432 return 0; 433 434 if (os_get_time(&t) < 0 || os_gmtime(t.sec, &tm) < 0) 435 return -1; 436 437 if (!hapd->time_adv) { 438 hapd->time_adv = wpabuf_alloc(elen); 439 if (hapd->time_adv == NULL) 440 return -1; 441 pos = wpabuf_put(hapd->time_adv, elen); 442 } else 443 pos = wpabuf_mhead_u8(hapd->time_adv); 444 445 *pos++ = WLAN_EID_TIME_ADVERTISEMENT; 446 *pos++ = 1 + 10 + 5 + 1; 447 448 *pos++ = 2; /* UTC time at which the TSF timer is 0 */ 449 450 /* Time Value at TSF 0 */ 451 /* FIX: need to calculate this based on the current TSF value */ 452 WPA_PUT_LE16(pos, tm.year); /* Year */ 453 pos += 2; 454 *pos++ = tm.month; /* Month */ 455 *pos++ = tm.day; /* Day of month */ 456 *pos++ = tm.hour; /* Hours */ 457 *pos++ = tm.min; /* Minutes */ 458 *pos++ = tm.sec; /* Seconds */ 459 WPA_PUT_LE16(pos, 0); /* Milliseconds (not used) */ 460 pos += 2; 461 *pos++ = 0; /* Reserved */ 462 463 /* Time Error */ 464 /* TODO: fill in an estimate on the error */ 465 *pos++ = 0; 466 *pos++ = 0; 467 *pos++ = 0; 468 *pos++ = 0; 469 *pos++ = 0; 470 471 *pos++ = hapd->time_update_counter++; 472 473 return 0; 474} 475 476 477u8 * hostapd_eid_bss_max_idle_period(struct hostapd_data *hapd, u8 *eid) 478{ 479 u8 *pos = eid; 480 481#ifdef CONFIG_WNM 482 if (hapd->conf->ap_max_inactivity > 0) { 483 unsigned int val; 484 *pos++ = WLAN_EID_BSS_MAX_IDLE_PERIOD; 485 *pos++ = 3; 486 val = hapd->conf->ap_max_inactivity; 487 if (val > 68000) 488 val = 68000; 489 val *= 1000; 490 val /= 1024; 491 if (val == 0) 492 val = 1; 493 if (val > 65535) 494 val = 65535; 495 WPA_PUT_LE16(pos, val); 496 pos += 2; 497 *pos++ = 0x00; /* TODO: Protected Keep-Alive Required */ 498 } 499#endif /* CONFIG_WNM */ 500 501 return pos; 502} 503