ieee802_11_shared.c revision 051af73b8f8014eff33330aead0f36944b3403e6
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 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 break; 203 case 6: /* Bits 48-55 */ 204 if (hapd->conf->ssid.utf8_ssid) 205 *pos |= 0x01; /* Bit 48 - UTF-8 SSID */ 206 break; 207 } 208} 209 210 211u8 * hostapd_eid_ext_capab(struct hostapd_data *hapd, u8 *eid) 212{ 213 u8 *pos = eid; 214 u8 len = 0, i; 215 216 if (hapd->conf->tdls & (TDLS_PROHIBIT | TDLS_PROHIBIT_CHAN_SWITCH)) 217 len = 5; 218 if (len < 4 && hapd->conf->interworking) 219 len = 4; 220 if (len < 3 && hapd->conf->wnm_sleep_mode) 221 len = 3; 222 if (len < 7 && hapd->conf->ssid.utf8_ssid) 223 len = 7; 224#ifdef CONFIG_WNM 225 if (len < 4) 226 len = 4; 227#endif /* CONFIG_WNM */ 228 if (len < hapd->iface->extended_capa_len) 229 len = hapd->iface->extended_capa_len; 230 if (len == 0) 231 return eid; 232 233 *pos++ = WLAN_EID_EXT_CAPAB; 234 *pos++ = len; 235 for (i = 0; i < len; i++, pos++) { 236 hostapd_ext_capab_byte(hapd, pos, i); 237 238 if (i < hapd->iface->extended_capa_len) { 239 *pos &= ~hapd->iface->extended_capa_mask[i]; 240 *pos |= hapd->iface->extended_capa[i]; 241 } 242 } 243 244 while (len > 0 && eid[1 + len] == 0) { 245 len--; 246 eid[1] = len; 247 } 248 if (len == 0) 249 return eid; 250 251 return eid + 2 + len; 252} 253 254 255u8 * hostapd_eid_qos_map_set(struct hostapd_data *hapd, u8 *eid) 256{ 257 u8 *pos = eid; 258 u8 len = hapd->conf->qos_map_set_len; 259 260 if (!len) 261 return eid; 262 263 *pos++ = WLAN_EID_QOS_MAP_SET; 264 *pos++ = len; 265 os_memcpy(pos, hapd->conf->qos_map_set, len); 266 pos += len; 267 268 return pos; 269} 270 271 272u8 * hostapd_eid_interworking(struct hostapd_data *hapd, u8 *eid) 273{ 274 u8 *pos = eid; 275#ifdef CONFIG_INTERWORKING 276 u8 *len; 277 278 if (!hapd->conf->interworking) 279 return eid; 280 281 *pos++ = WLAN_EID_INTERWORKING; 282 len = pos++; 283 284 *pos = hapd->conf->access_network_type; 285 if (hapd->conf->internet) 286 *pos |= INTERWORKING_ANO_INTERNET; 287 if (hapd->conf->asra) 288 *pos |= INTERWORKING_ANO_ASRA; 289 if (hapd->conf->esr) 290 *pos |= INTERWORKING_ANO_ESR; 291 if (hapd->conf->uesa) 292 *pos |= INTERWORKING_ANO_UESA; 293 pos++; 294 295 if (hapd->conf->venue_info_set) { 296 *pos++ = hapd->conf->venue_group; 297 *pos++ = hapd->conf->venue_type; 298 } 299 300 if (!is_zero_ether_addr(hapd->conf->hessid)) { 301 os_memcpy(pos, hapd->conf->hessid, ETH_ALEN); 302 pos += ETH_ALEN; 303 } 304 305 *len = pos - len - 1; 306#endif /* CONFIG_INTERWORKING */ 307 308 return pos; 309} 310 311 312u8 * hostapd_eid_adv_proto(struct hostapd_data *hapd, u8 *eid) 313{ 314 u8 *pos = eid; 315#ifdef CONFIG_INTERWORKING 316 317 /* TODO: Separate configuration for ANQP? */ 318 if (!hapd->conf->interworking) 319 return eid; 320 321 *pos++ = WLAN_EID_ADV_PROTO; 322 *pos++ = 2; 323 *pos++ = 0x7F; /* Query Response Length Limit | PAME-BI */ 324 *pos++ = ACCESS_NETWORK_QUERY_PROTOCOL; 325#endif /* CONFIG_INTERWORKING */ 326 327 return pos; 328} 329 330 331u8 * hostapd_eid_roaming_consortium(struct hostapd_data *hapd, u8 *eid) 332{ 333 u8 *pos = eid; 334#ifdef CONFIG_INTERWORKING 335 u8 *len; 336 unsigned int i, count; 337 338 if (!hapd->conf->interworking || 339 hapd->conf->roaming_consortium == NULL || 340 hapd->conf->roaming_consortium_count == 0) 341 return eid; 342 343 *pos++ = WLAN_EID_ROAMING_CONSORTIUM; 344 len = pos++; 345 346 /* Number of ANQP OIs (in addition to the max 3 listed here) */ 347 if (hapd->conf->roaming_consortium_count > 3 + 255) 348 *pos++ = 255; 349 else if (hapd->conf->roaming_consortium_count > 3) 350 *pos++ = hapd->conf->roaming_consortium_count - 3; 351 else 352 *pos++ = 0; 353 354 /* OU #1 and #2 Lengths */ 355 *pos = hapd->conf->roaming_consortium[0].len; 356 if (hapd->conf->roaming_consortium_count > 1) 357 *pos |= hapd->conf->roaming_consortium[1].len << 4; 358 pos++; 359 360 if (hapd->conf->roaming_consortium_count > 3) 361 count = 3; 362 else 363 count = hapd->conf->roaming_consortium_count; 364 365 for (i = 0; i < count; i++) { 366 os_memcpy(pos, hapd->conf->roaming_consortium[i].oi, 367 hapd->conf->roaming_consortium[i].len); 368 pos += hapd->conf->roaming_consortium[i].len; 369 } 370 371 *len = pos - len - 1; 372#endif /* CONFIG_INTERWORKING */ 373 374 return pos; 375} 376 377 378u8 * hostapd_eid_time_adv(struct hostapd_data *hapd, u8 *eid) 379{ 380 if (hapd->conf->time_advertisement != 2) 381 return eid; 382 383 if (hapd->time_adv == NULL && 384 hostapd_update_time_adv(hapd) < 0) 385 return eid; 386 387 if (hapd->time_adv == NULL) 388 return eid; 389 390 os_memcpy(eid, wpabuf_head(hapd->time_adv), 391 wpabuf_len(hapd->time_adv)); 392 eid += wpabuf_len(hapd->time_adv); 393 394 return eid; 395} 396 397 398u8 * hostapd_eid_time_zone(struct hostapd_data *hapd, u8 *eid) 399{ 400 size_t len; 401 402 if (hapd->conf->time_advertisement != 2) 403 return eid; 404 405 len = os_strlen(hapd->conf->time_zone); 406 407 *eid++ = WLAN_EID_TIME_ZONE; 408 *eid++ = len; 409 os_memcpy(eid, hapd->conf->time_zone, len); 410 eid += len; 411 412 return eid; 413} 414 415 416int hostapd_update_time_adv(struct hostapd_data *hapd) 417{ 418 const int elen = 2 + 1 + 10 + 5 + 1; 419 struct os_time t; 420 struct os_tm tm; 421 u8 *pos; 422 423 if (hapd->conf->time_advertisement != 2) 424 return 0; 425 426 if (os_get_time(&t) < 0 || os_gmtime(t.sec, &tm) < 0) 427 return -1; 428 429 if (!hapd->time_adv) { 430 hapd->time_adv = wpabuf_alloc(elen); 431 if (hapd->time_adv == NULL) 432 return -1; 433 pos = wpabuf_put(hapd->time_adv, elen); 434 } else 435 pos = wpabuf_mhead_u8(hapd->time_adv); 436 437 *pos++ = WLAN_EID_TIME_ADVERTISEMENT; 438 *pos++ = 1 + 10 + 5 + 1; 439 440 *pos++ = 2; /* UTC time at which the TSF timer is 0 */ 441 442 /* Time Value at TSF 0 */ 443 /* FIX: need to calculate this based on the current TSF value */ 444 WPA_PUT_LE16(pos, tm.year); /* Year */ 445 pos += 2; 446 *pos++ = tm.month; /* Month */ 447 *pos++ = tm.day; /* Day of month */ 448 *pos++ = tm.hour; /* Hours */ 449 *pos++ = tm.min; /* Minutes */ 450 *pos++ = tm.sec; /* Seconds */ 451 WPA_PUT_LE16(pos, 0); /* Milliseconds (not used) */ 452 pos += 2; 453 *pos++ = 0; /* Reserved */ 454 455 /* Time Error */ 456 /* TODO: fill in an estimate on the error */ 457 *pos++ = 0; 458 *pos++ = 0; 459 *pos++ = 0; 460 *pos++ = 0; 461 *pos++ = 0; 462 463 *pos++ = hapd->time_update_counter++; 464 465 return 0; 466} 467 468 469u8 * hostapd_eid_bss_max_idle_period(struct hostapd_data *hapd, u8 *eid) 470{ 471 u8 *pos = eid; 472 473#ifdef CONFIG_WNM 474 if (hapd->conf->ap_max_inactivity > 0) { 475 unsigned int val; 476 *pos++ = WLAN_EID_BSS_MAX_IDLE_PERIOD; 477 *pos++ = 3; 478 val = hapd->conf->ap_max_inactivity; 479 if (val > 68000) 480 val = 68000; 481 val *= 1000; 482 val /= 1024; 483 if (val == 0) 484 val = 1; 485 if (val > 65535) 486 val = 65535; 487 WPA_PUT_LE16(pos, val); 488 pos += 2; 489 *pos++ = 0x00; /* TODO: Protected Keep-Alive Required */ 490 } 491#endif /* CONFIG_WNM */ 492 493 return pos; 494} 495