ieee802_11_shared.c revision 252190
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_time now, passed; 28 29 *pos++ = WLAN_EID_TIMEOUT_INTERVAL; 30 *pos++ = 5; 31 *pos++ = WLAN_TIMEOUT_ASSOC_COMEBACK; 32 os_get_time(&now); 33 os_time_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 perror("ieee802_11_send_sa_query_req: send"); 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 perror("ieee80211_mgmt_sa_query_request: send"); 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 167u8 * hostapd_eid_ext_capab(struct hostapd_data *hapd, u8 *eid) 168{ 169 u8 *pos = eid; 170 u8 len = 0; 171 172 if (hapd->conf->tdls & (TDLS_PROHIBIT | TDLS_PROHIBIT_CHAN_SWITCH)) 173 len = 5; 174 if (len < 4 && hapd->conf->interworking) 175 len = 4; 176 if (len < 3 && hapd->conf->wnm_sleep_mode) 177 len = 3; 178 if (len < 7 && hapd->conf->ssid.utf8_ssid) 179 len = 7; 180#ifdef CONFIG_WNM 181 if (len < 4) 182 len = 4; 183#endif /* CONFIG_WNM */ 184 if (len == 0) 185 return eid; 186 187 *pos++ = WLAN_EID_EXT_CAPAB; 188 *pos++ = len; 189 *pos++ = 0x00; 190 *pos++ = 0x00; 191 192 *pos = 0x00; 193 if (hapd->conf->wnm_sleep_mode) 194 *pos |= 0x02; /* Bit 17 - WNM-Sleep Mode */ 195 if (hapd->conf->bss_transition) 196 *pos |= 0x08; /* Bit 19 - BSS Transition */ 197 pos++; 198 199 if (len < 4) 200 return pos; 201 *pos = 0x00; 202#ifdef CONFIG_WNM 203 *pos |= 0x02; /* Bit 25 - SSID List */ 204#endif /* CONFIG_WNM */ 205 if (hapd->conf->time_advertisement == 2) 206 *pos |= 0x08; /* Bit 27 - UTC TSF Offset */ 207 if (hapd->conf->interworking) 208 *pos |= 0x80; /* Bit 31 - Interworking */ 209 pos++; 210 211 if (len < 5) 212 return pos; 213 *pos = 0x00; 214 if (hapd->conf->tdls & TDLS_PROHIBIT) 215 *pos |= 0x40; /* Bit 38 - TDLS Prohibited */ 216 if (hapd->conf->tdls & TDLS_PROHIBIT_CHAN_SWITCH) 217 *pos |= 0x80; /* Bit 39 - TDLS Channel Switching Prohibited */ 218 pos++; 219 220 if (len < 6) 221 return pos; 222 *pos = 0x00; 223 pos++; 224 225 if (len < 7) 226 return pos; 227 *pos = 0x00; 228 if (hapd->conf->ssid.utf8_ssid) 229 *pos |= 0x01; /* Bit 48 - UTF-8 SSID */ 230 pos++; 231 232 return pos; 233} 234 235 236u8 * hostapd_eid_interworking(struct hostapd_data *hapd, u8 *eid) 237{ 238 u8 *pos = eid; 239#ifdef CONFIG_INTERWORKING 240 u8 *len; 241 242 if (!hapd->conf->interworking) 243 return eid; 244 245 *pos++ = WLAN_EID_INTERWORKING; 246 len = pos++; 247 248 *pos = hapd->conf->access_network_type; 249 if (hapd->conf->internet) 250 *pos |= INTERWORKING_ANO_INTERNET; 251 if (hapd->conf->asra) 252 *pos |= INTERWORKING_ANO_ASRA; 253 if (hapd->conf->esr) 254 *pos |= INTERWORKING_ANO_ESR; 255 if (hapd->conf->uesa) 256 *pos |= INTERWORKING_ANO_UESA; 257 pos++; 258 259 if (hapd->conf->venue_info_set) { 260 *pos++ = hapd->conf->venue_group; 261 *pos++ = hapd->conf->venue_type; 262 } 263 264 if (!is_zero_ether_addr(hapd->conf->hessid)) { 265 os_memcpy(pos, hapd->conf->hessid, ETH_ALEN); 266 pos += ETH_ALEN; 267 } 268 269 *len = pos - len - 1; 270#endif /* CONFIG_INTERWORKING */ 271 272 return pos; 273} 274 275 276u8 * hostapd_eid_adv_proto(struct hostapd_data *hapd, u8 *eid) 277{ 278 u8 *pos = eid; 279#ifdef CONFIG_INTERWORKING 280 281 /* TODO: Separate configuration for ANQP? */ 282 if (!hapd->conf->interworking) 283 return eid; 284 285 *pos++ = WLAN_EID_ADV_PROTO; 286 *pos++ = 2; 287 *pos++ = 0x7F; /* Query Response Length Limit | PAME-BI */ 288 *pos++ = ACCESS_NETWORK_QUERY_PROTOCOL; 289#endif /* CONFIG_INTERWORKING */ 290 291 return pos; 292} 293 294 295u8 * hostapd_eid_roaming_consortium(struct hostapd_data *hapd, u8 *eid) 296{ 297 u8 *pos = eid; 298#ifdef CONFIG_INTERWORKING 299 u8 *len; 300 unsigned int i, count; 301 302 if (!hapd->conf->interworking || 303 hapd->conf->roaming_consortium == NULL || 304 hapd->conf->roaming_consortium_count == 0) 305 return eid; 306 307 *pos++ = WLAN_EID_ROAMING_CONSORTIUM; 308 len = pos++; 309 310 /* Number of ANQP OIs (in addition to the max 3 listed here) */ 311 if (hapd->conf->roaming_consortium_count > 3 + 255) 312 *pos++ = 255; 313 else if (hapd->conf->roaming_consortium_count > 3) 314 *pos++ = hapd->conf->roaming_consortium_count - 3; 315 else 316 *pos++ = 0; 317 318 /* OU #1 and #2 Lengths */ 319 *pos = hapd->conf->roaming_consortium[0].len; 320 if (hapd->conf->roaming_consortium_count > 1) 321 *pos |= hapd->conf->roaming_consortium[1].len << 4; 322 pos++; 323 324 if (hapd->conf->roaming_consortium_count > 3) 325 count = 3; 326 else 327 count = hapd->conf->roaming_consortium_count; 328 329 for (i = 0; i < count; i++) { 330 os_memcpy(pos, hapd->conf->roaming_consortium[i].oi, 331 hapd->conf->roaming_consortium[i].len); 332 pos += hapd->conf->roaming_consortium[i].len; 333 } 334 335 *len = pos - len - 1; 336#endif /* CONFIG_INTERWORKING */ 337 338 return pos; 339} 340 341 342u8 * hostapd_eid_time_adv(struct hostapd_data *hapd, u8 *eid) 343{ 344 if (hapd->conf->time_advertisement != 2) 345 return eid; 346 347 if (hapd->time_adv == NULL && 348 hostapd_update_time_adv(hapd) < 0) 349 return eid; 350 351 if (hapd->time_adv == NULL) 352 return eid; 353 354 os_memcpy(eid, wpabuf_head(hapd->time_adv), 355 wpabuf_len(hapd->time_adv)); 356 eid += wpabuf_len(hapd->time_adv); 357 358 return eid; 359} 360 361 362u8 * hostapd_eid_time_zone(struct hostapd_data *hapd, u8 *eid) 363{ 364 size_t len; 365 366 if (hapd->conf->time_advertisement != 2) 367 return eid; 368 369 len = os_strlen(hapd->conf->time_zone); 370 371 *eid++ = WLAN_EID_TIME_ZONE; 372 *eid++ = len; 373 os_memcpy(eid, hapd->conf->time_zone, len); 374 eid += len; 375 376 return eid; 377} 378 379 380int hostapd_update_time_adv(struct hostapd_data *hapd) 381{ 382 const int elen = 2 + 1 + 10 + 5 + 1; 383 struct os_time t; 384 struct os_tm tm; 385 u8 *pos; 386 387 if (hapd->conf->time_advertisement != 2) 388 return 0; 389 390 if (os_get_time(&t) < 0 || os_gmtime(t.sec, &tm) < 0) 391 return -1; 392 393 if (!hapd->time_adv) { 394 hapd->time_adv = wpabuf_alloc(elen); 395 if (hapd->time_adv == NULL) 396 return -1; 397 pos = wpabuf_put(hapd->time_adv, elen); 398 } else 399 pos = wpabuf_mhead_u8(hapd->time_adv); 400 401 *pos++ = WLAN_EID_TIME_ADVERTISEMENT; 402 *pos++ = 1 + 10 + 5 + 1; 403 404 *pos++ = 2; /* UTC time at which the TSF timer is 0 */ 405 406 /* Time Value at TSF 0 */ 407 /* FIX: need to calculate this based on the current TSF value */ 408 WPA_PUT_LE16(pos, tm.year); /* Year */ 409 pos += 2; 410 *pos++ = tm.month; /* Month */ 411 *pos++ = tm.day; /* Day of month */ 412 *pos++ = tm.hour; /* Hours */ 413 *pos++ = tm.min; /* Minutes */ 414 *pos++ = tm.sec; /* Seconds */ 415 WPA_PUT_LE16(pos, 0); /* Milliseconds (not used) */ 416 pos += 2; 417 *pos++ = 0; /* Reserved */ 418 419 /* Time Error */ 420 /* TODO: fill in an estimate on the error */ 421 *pos++ = 0; 422 *pos++ = 0; 423 *pos++ = 0; 424 *pos++ = 0; 425 *pos++ = 0; 426 427 *pos++ = hapd->time_update_counter++; 428 429 return 0; 430} 431 432 433u8 * hostapd_eid_bss_max_idle_period(struct hostapd_data *hapd, u8 *eid) 434{ 435 u8 *pos = eid; 436 437#ifdef CONFIG_WNM 438 if (hapd->conf->ap_max_inactivity > 0) { 439 unsigned int val; 440 *pos++ = WLAN_EID_BSS_MAX_IDLE_PERIOD; 441 *pos++ = 3; 442 val = hapd->conf->ap_max_inactivity; 443 if (val > 68000) 444 val = 68000; 445 val *= 1000; 446 val /= 1024; 447 if (val == 0) 448 val = 1; 449 if (val > 65535) 450 val = 65535; 451 WPA_PUT_LE16(pos, val); 452 pos += 2; 453 *pos++ = 0x00; /* TODO: Protected Keep-Alive Required */ 454 } 455#endif /* CONFIG_WNM */ 456 457 return pos; 458} 459