ieee802_11_shared.c revision c5ec7f57ead87efa365800228aa0b09a12d9e6c4
1/* 2 * hostapd / IEEE 802.11 Management 3 * Copyright (c) 2002-2010, 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 == 0) 177 return eid; 178 179 *pos++ = WLAN_EID_EXT_CAPAB; 180 *pos++ = len; 181 *pos++ = 0x00; 182 *pos++ = 0x00; 183 *pos++ = 0x00; 184 185 *pos = 0x00; 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 pos++; 191 192 if (len < 5) 193 return pos; 194 *pos = 0x00; 195 if (hapd->conf->tdls & TDLS_PROHIBIT) 196 *pos |= 0x40; /* Bit 38 - TDLS Prohibited */ 197 if (hapd->conf->tdls & TDLS_PROHIBIT_CHAN_SWITCH) 198 *pos |= 0x80; /* Bit 39 - TDLS Channel Switching Prohibited */ 199 pos++; 200 201 return pos; 202} 203 204 205u8 * hostapd_eid_interworking(struct hostapd_data *hapd, u8 *eid) 206{ 207 u8 *pos = eid; 208#ifdef CONFIG_INTERWORKING 209 u8 *len; 210 211 if (!hapd->conf->interworking) 212 return eid; 213 214 *pos++ = WLAN_EID_INTERWORKING; 215 len = pos++; 216 217 *pos = hapd->conf->access_network_type; 218 if (hapd->conf->internet) 219 *pos |= INTERWORKING_ANO_INTERNET; 220 if (hapd->conf->asra) 221 *pos |= INTERWORKING_ANO_ASRA; 222 if (hapd->conf->esr) 223 *pos |= INTERWORKING_ANO_ESR; 224 if (hapd->conf->uesa) 225 *pos |= INTERWORKING_ANO_UESA; 226 pos++; 227 228 if (hapd->conf->venue_info_set) { 229 *pos++ = hapd->conf->venue_group; 230 *pos++ = hapd->conf->venue_type; 231 } 232 233 if (!is_zero_ether_addr(hapd->conf->hessid)) { 234 os_memcpy(pos, hapd->conf->hessid, ETH_ALEN); 235 pos += ETH_ALEN; 236 } 237 238 *len = pos - len - 1; 239#endif /* CONFIG_INTERWORKING */ 240 241 return pos; 242} 243 244 245u8 * hostapd_eid_adv_proto(struct hostapd_data *hapd, u8 *eid) 246{ 247 u8 *pos = eid; 248#ifdef CONFIG_INTERWORKING 249 250 /* TODO: Separate configuration for ANQP? */ 251 if (!hapd->conf->interworking) 252 return eid; 253 254 *pos++ = WLAN_EID_ADV_PROTO; 255 *pos++ = 2; 256 *pos++ = 0x7F; /* Query Response Length Limit | PAME-BI */ 257 *pos++ = ACCESS_NETWORK_QUERY_PROTOCOL; 258#endif /* CONFIG_INTERWORKING */ 259 260 return pos; 261} 262 263 264u8 * hostapd_eid_roaming_consortium(struct hostapd_data *hapd, u8 *eid) 265{ 266 u8 *pos = eid; 267#ifdef CONFIG_INTERWORKING 268 u8 *len; 269 unsigned int i, count; 270 271 if (!hapd->conf->interworking || 272 hapd->conf->roaming_consortium == NULL || 273 hapd->conf->roaming_consortium_count == 0) 274 return eid; 275 276 *pos++ = WLAN_EID_ROAMING_CONSORTIUM; 277 len = pos++; 278 279 /* Number of ANQP OIs (in addition to the max 3 listed here) */ 280 if (hapd->conf->roaming_consortium_count > 3 + 255) 281 *pos++ = 255; 282 else if (hapd->conf->roaming_consortium_count > 3) 283 *pos++ = hapd->conf->roaming_consortium_count - 3; 284 else 285 *pos++ = 0; 286 287 /* OU #1 and #2 Lengths */ 288 *pos = hapd->conf->roaming_consortium[0].len; 289 if (hapd->conf->roaming_consortium_count > 1) 290 *pos |= hapd->conf->roaming_consortium[1].len << 4; 291 pos++; 292 293 if (hapd->conf->roaming_consortium_count > 3) 294 count = 3; 295 else 296 count = hapd->conf->roaming_consortium_count; 297 298 for (i = 0; i < count; i++) { 299 os_memcpy(pos, hapd->conf->roaming_consortium[i].oi, 300 hapd->conf->roaming_consortium[i].len); 301 pos += hapd->conf->roaming_consortium[i].len; 302 } 303 304 *len = pos - len - 1; 305#endif /* CONFIG_INTERWORKING */ 306 307 return pos; 308} 309 310 311u8 * hostapd_eid_time_adv(struct hostapd_data *hapd, u8 *eid) 312{ 313 if (hapd->conf->time_advertisement != 2) 314 return eid; 315 316 if (hapd->time_adv == NULL && 317 hostapd_update_time_adv(hapd) < 0) 318 return eid; 319 320 if (hapd->time_adv == NULL) 321 return eid; 322 323 os_memcpy(eid, wpabuf_head(hapd->time_adv), 324 wpabuf_len(hapd->time_adv)); 325 eid += wpabuf_len(hapd->time_adv); 326 327 return eid; 328} 329 330 331u8 * hostapd_eid_time_zone(struct hostapd_data *hapd, u8 *eid) 332{ 333 size_t len; 334 335 if (hapd->conf->time_advertisement != 2) 336 return eid; 337 338 len = os_strlen(hapd->conf->time_zone); 339 340 *eid++ = WLAN_EID_TIME_ZONE; 341 *eid++ = len; 342 os_memcpy(eid, hapd->conf->time_zone, len); 343 eid += len; 344 345 return eid; 346} 347 348 349int hostapd_update_time_adv(struct hostapd_data *hapd) 350{ 351 const int elen = 2 + 1 + 10 + 5 + 1; 352 struct os_time t; 353 struct os_tm tm; 354 u8 *pos; 355 356 if (hapd->conf->time_advertisement != 2) 357 return 0; 358 359 if (os_get_time(&t) < 0 || os_gmtime(t.sec, &tm) < 0) 360 return -1; 361 362 if (!hapd->time_adv) { 363 hapd->time_adv = wpabuf_alloc(elen); 364 if (hapd->time_adv == NULL) 365 return -1; 366 pos = wpabuf_put(hapd->time_adv, elen); 367 } else 368 pos = wpabuf_mhead_u8(hapd->time_adv); 369 370 *pos++ = WLAN_EID_TIME_ADVERTISEMENT; 371 *pos++ = 1 + 10 + 5 + 1; 372 373 *pos++ = 2; /* UTC time at which the TSF timer is 0 */ 374 375 /* Time Value at TSF 0 */ 376 /* FIX: need to calculate this based on the current TSF value */ 377 WPA_PUT_LE16(pos, tm.year); /* Year */ 378 pos += 2; 379 *pos++ = tm.month; /* Month */ 380 *pos++ = tm.day; /* Day of month */ 381 *pos++ = tm.hour; /* Hours */ 382 *pos++ = tm.min; /* Minutes */ 383 *pos++ = tm.sec; /* Seconds */ 384 WPA_PUT_LE16(pos, 0); /* Milliseconds (not used) */ 385 pos += 2; 386 *pos++ = 0; /* Reserved */ 387 388 /* Time Error */ 389 /* TODO: fill in an estimate on the error */ 390 *pos++ = 0; 391 *pos++ = 0; 392 *pos++ = 0; 393 *pos++ = 0; 394 *pos++ = 0; 395 396 *pos++ = hapd->time_update_counter++; 397 398 return 0; 399} 400