ieee802_11_shared.c revision 252190
1252190Srpaulo/* 2252190Srpaulo * hostapd / IEEE 802.11 Management 3252190Srpaulo * Copyright (c) 2002-2012, Jouni Malinen <j@w1.fi> 4252190Srpaulo * 5252190Srpaulo * This software may be distributed under the terms of the BSD license. 6252190Srpaulo * See README for more details. 7252190Srpaulo */ 8252190Srpaulo 9252190Srpaulo#include "utils/includes.h" 10252190Srpaulo 11252190Srpaulo#include "utils/common.h" 12252190Srpaulo#include "common/ieee802_11_defs.h" 13252190Srpaulo#include "hostapd.h" 14252190Srpaulo#include "sta_info.h" 15252190Srpaulo#include "ap_config.h" 16252190Srpaulo#include "ap_drv_ops.h" 17252190Srpaulo#include "ieee802_11.h" 18252190Srpaulo 19252190Srpaulo 20252190Srpaulo#ifdef CONFIG_IEEE80211W 21252190Srpaulo 22252190Srpaulou8 * hostapd_eid_assoc_comeback_time(struct hostapd_data *hapd, 23252190Srpaulo struct sta_info *sta, u8 *eid) 24252190Srpaulo{ 25252190Srpaulo u8 *pos = eid; 26252190Srpaulo u32 timeout, tu; 27252190Srpaulo struct os_time now, passed; 28252190Srpaulo 29252190Srpaulo *pos++ = WLAN_EID_TIMEOUT_INTERVAL; 30252190Srpaulo *pos++ = 5; 31252190Srpaulo *pos++ = WLAN_TIMEOUT_ASSOC_COMEBACK; 32252190Srpaulo os_get_time(&now); 33252190Srpaulo os_time_sub(&now, &sta->sa_query_start, &passed); 34252190Srpaulo tu = (passed.sec * 1000000 + passed.usec) / 1024; 35252190Srpaulo if (hapd->conf->assoc_sa_query_max_timeout > tu) 36252190Srpaulo timeout = hapd->conf->assoc_sa_query_max_timeout - tu; 37252190Srpaulo else 38252190Srpaulo timeout = 0; 39252190Srpaulo if (timeout < hapd->conf->assoc_sa_query_max_timeout) 40252190Srpaulo timeout++; /* add some extra time for local timers */ 41252190Srpaulo WPA_PUT_LE32(pos, timeout); 42252190Srpaulo pos += 4; 43252190Srpaulo 44252190Srpaulo return pos; 45252190Srpaulo} 46252190Srpaulo 47252190Srpaulo 48252190Srpaulo/* MLME-SAQuery.request */ 49252190Srpaulovoid ieee802_11_send_sa_query_req(struct hostapd_data *hapd, 50252190Srpaulo const u8 *addr, const u8 *trans_id) 51252190Srpaulo{ 52252190Srpaulo struct ieee80211_mgmt mgmt; 53252190Srpaulo u8 *end; 54252190Srpaulo 55252190Srpaulo wpa_printf(MSG_DEBUG, "IEEE 802.11: Sending SA Query Request to " 56252190Srpaulo MACSTR, MAC2STR(addr)); 57252190Srpaulo wpa_hexdump(MSG_DEBUG, "IEEE 802.11: SA Query Transaction ID", 58252190Srpaulo trans_id, WLAN_SA_QUERY_TR_ID_LEN); 59252190Srpaulo 60252190Srpaulo os_memset(&mgmt, 0, sizeof(mgmt)); 61252190Srpaulo mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, 62252190Srpaulo WLAN_FC_STYPE_ACTION); 63252190Srpaulo os_memcpy(mgmt.da, addr, ETH_ALEN); 64252190Srpaulo os_memcpy(mgmt.sa, hapd->own_addr, ETH_ALEN); 65252190Srpaulo os_memcpy(mgmt.bssid, hapd->own_addr, ETH_ALEN); 66252190Srpaulo mgmt.u.action.category = WLAN_ACTION_SA_QUERY; 67252190Srpaulo mgmt.u.action.u.sa_query_req.action = WLAN_SA_QUERY_REQUEST; 68252190Srpaulo os_memcpy(mgmt.u.action.u.sa_query_req.trans_id, trans_id, 69252190Srpaulo WLAN_SA_QUERY_TR_ID_LEN); 70252190Srpaulo end = mgmt.u.action.u.sa_query_req.trans_id + WLAN_SA_QUERY_TR_ID_LEN; 71252190Srpaulo if (hostapd_drv_send_mlme(hapd, &mgmt, end - (u8 *) &mgmt, 0) < 0) 72252190Srpaulo perror("ieee802_11_send_sa_query_req: send"); 73252190Srpaulo} 74252190Srpaulo 75252190Srpaulo 76252190Srpaulostatic void ieee802_11_send_sa_query_resp(struct hostapd_data *hapd, 77252190Srpaulo const u8 *sa, const u8 *trans_id) 78252190Srpaulo{ 79252190Srpaulo struct sta_info *sta; 80252190Srpaulo struct ieee80211_mgmt resp; 81252190Srpaulo u8 *end; 82252190Srpaulo 83252190Srpaulo wpa_printf(MSG_DEBUG, "IEEE 802.11: Received SA Query Request from " 84252190Srpaulo MACSTR, MAC2STR(sa)); 85252190Srpaulo wpa_hexdump(MSG_DEBUG, "IEEE 802.11: SA Query Transaction ID", 86252190Srpaulo trans_id, WLAN_SA_QUERY_TR_ID_LEN); 87252190Srpaulo 88252190Srpaulo sta = ap_get_sta(hapd, sa); 89252190Srpaulo if (sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) { 90252190Srpaulo wpa_printf(MSG_DEBUG, "IEEE 802.11: Ignore SA Query Request " 91252190Srpaulo "from unassociated STA " MACSTR, MAC2STR(sa)); 92252190Srpaulo return; 93252190Srpaulo } 94252190Srpaulo 95252190Srpaulo wpa_printf(MSG_DEBUG, "IEEE 802.11: Sending SA Query Response to " 96252190Srpaulo MACSTR, MAC2STR(sa)); 97252190Srpaulo 98252190Srpaulo os_memset(&resp, 0, sizeof(resp)); 99252190Srpaulo resp.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, 100252190Srpaulo WLAN_FC_STYPE_ACTION); 101252190Srpaulo os_memcpy(resp.da, sa, ETH_ALEN); 102252190Srpaulo os_memcpy(resp.sa, hapd->own_addr, ETH_ALEN); 103252190Srpaulo os_memcpy(resp.bssid, hapd->own_addr, ETH_ALEN); 104252190Srpaulo resp.u.action.category = WLAN_ACTION_SA_QUERY; 105252190Srpaulo resp.u.action.u.sa_query_req.action = WLAN_SA_QUERY_RESPONSE; 106252190Srpaulo os_memcpy(resp.u.action.u.sa_query_req.trans_id, trans_id, 107252190Srpaulo WLAN_SA_QUERY_TR_ID_LEN); 108252190Srpaulo end = resp.u.action.u.sa_query_req.trans_id + WLAN_SA_QUERY_TR_ID_LEN; 109252190Srpaulo if (hostapd_drv_send_mlme(hapd, &resp, end - (u8 *) &resp, 0) < 0) 110252190Srpaulo perror("ieee80211_mgmt_sa_query_request: send"); 111252190Srpaulo} 112252190Srpaulo 113252190Srpaulo 114252190Srpaulovoid ieee802_11_sa_query_action(struct hostapd_data *hapd, const u8 *sa, 115252190Srpaulo const u8 action_type, const u8 *trans_id) 116252190Srpaulo{ 117252190Srpaulo struct sta_info *sta; 118252190Srpaulo int i; 119252190Srpaulo 120252190Srpaulo if (action_type == WLAN_SA_QUERY_REQUEST) { 121252190Srpaulo ieee802_11_send_sa_query_resp(hapd, sa, trans_id); 122252190Srpaulo return; 123252190Srpaulo } 124252190Srpaulo 125252190Srpaulo if (action_type != WLAN_SA_QUERY_RESPONSE) { 126252190Srpaulo wpa_printf(MSG_DEBUG, "IEEE 802.11: Unexpected SA Query " 127252190Srpaulo "Action %d", action_type); 128252190Srpaulo return; 129252190Srpaulo } 130252190Srpaulo 131252190Srpaulo wpa_printf(MSG_DEBUG, "IEEE 802.11: Received SA Query Response from " 132252190Srpaulo MACSTR, MAC2STR(sa)); 133252190Srpaulo wpa_hexdump(MSG_DEBUG, "IEEE 802.11: SA Query Transaction ID", 134252190Srpaulo trans_id, WLAN_SA_QUERY_TR_ID_LEN); 135252190Srpaulo 136252190Srpaulo /* MLME-SAQuery.confirm */ 137252190Srpaulo 138252190Srpaulo sta = ap_get_sta(hapd, sa); 139252190Srpaulo if (sta == NULL || sta->sa_query_trans_id == NULL) { 140252190Srpaulo wpa_printf(MSG_DEBUG, "IEEE 802.11: No matching STA with " 141252190Srpaulo "pending SA Query request found"); 142252190Srpaulo return; 143252190Srpaulo } 144252190Srpaulo 145252190Srpaulo for (i = 0; i < sta->sa_query_count; i++) { 146252190Srpaulo if (os_memcmp(sta->sa_query_trans_id + 147252190Srpaulo i * WLAN_SA_QUERY_TR_ID_LEN, 148252190Srpaulo trans_id, WLAN_SA_QUERY_TR_ID_LEN) == 0) 149252190Srpaulo break; 150252190Srpaulo } 151252190Srpaulo 152252190Srpaulo if (i >= sta->sa_query_count) { 153252190Srpaulo wpa_printf(MSG_DEBUG, "IEEE 802.11: No matching SA Query " 154252190Srpaulo "transaction identifier found"); 155252190Srpaulo return; 156252190Srpaulo } 157252190Srpaulo 158252190Srpaulo hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211, 159252190Srpaulo HOSTAPD_LEVEL_DEBUG, 160252190Srpaulo "Reply to pending SA Query received"); 161252190Srpaulo ap_sta_stop_sa_query(hapd, sta); 162252190Srpaulo} 163252190Srpaulo 164252190Srpaulo#endif /* CONFIG_IEEE80211W */ 165252190Srpaulo 166252190Srpaulo 167252190Srpaulou8 * hostapd_eid_ext_capab(struct hostapd_data *hapd, u8 *eid) 168252190Srpaulo{ 169252190Srpaulo u8 *pos = eid; 170252190Srpaulo u8 len = 0; 171252190Srpaulo 172252190Srpaulo if (hapd->conf->tdls & (TDLS_PROHIBIT | TDLS_PROHIBIT_CHAN_SWITCH)) 173252190Srpaulo len = 5; 174252190Srpaulo if (len < 4 && hapd->conf->interworking) 175252190Srpaulo len = 4; 176252190Srpaulo if (len < 3 && hapd->conf->wnm_sleep_mode) 177252190Srpaulo len = 3; 178252190Srpaulo if (len < 7 && hapd->conf->ssid.utf8_ssid) 179252190Srpaulo len = 7; 180252190Srpaulo#ifdef CONFIG_WNM 181252190Srpaulo if (len < 4) 182252190Srpaulo len = 4; 183252190Srpaulo#endif /* CONFIG_WNM */ 184252190Srpaulo if (len == 0) 185252190Srpaulo return eid; 186252190Srpaulo 187252190Srpaulo *pos++ = WLAN_EID_EXT_CAPAB; 188252190Srpaulo *pos++ = len; 189252190Srpaulo *pos++ = 0x00; 190252190Srpaulo *pos++ = 0x00; 191252190Srpaulo 192252190Srpaulo *pos = 0x00; 193252190Srpaulo if (hapd->conf->wnm_sleep_mode) 194252190Srpaulo *pos |= 0x02; /* Bit 17 - WNM-Sleep Mode */ 195252190Srpaulo if (hapd->conf->bss_transition) 196252190Srpaulo *pos |= 0x08; /* Bit 19 - BSS Transition */ 197252190Srpaulo pos++; 198252190Srpaulo 199252190Srpaulo if (len < 4) 200252190Srpaulo return pos; 201252190Srpaulo *pos = 0x00; 202252190Srpaulo#ifdef CONFIG_WNM 203252190Srpaulo *pos |= 0x02; /* Bit 25 - SSID List */ 204252190Srpaulo#endif /* CONFIG_WNM */ 205252190Srpaulo if (hapd->conf->time_advertisement == 2) 206252190Srpaulo *pos |= 0x08; /* Bit 27 - UTC TSF Offset */ 207252190Srpaulo if (hapd->conf->interworking) 208252190Srpaulo *pos |= 0x80; /* Bit 31 - Interworking */ 209252190Srpaulo pos++; 210252190Srpaulo 211252190Srpaulo if (len < 5) 212252190Srpaulo return pos; 213252190Srpaulo *pos = 0x00; 214252190Srpaulo if (hapd->conf->tdls & TDLS_PROHIBIT) 215252190Srpaulo *pos |= 0x40; /* Bit 38 - TDLS Prohibited */ 216252190Srpaulo if (hapd->conf->tdls & TDLS_PROHIBIT_CHAN_SWITCH) 217252190Srpaulo *pos |= 0x80; /* Bit 39 - TDLS Channel Switching Prohibited */ 218252190Srpaulo pos++; 219252190Srpaulo 220252190Srpaulo if (len < 6) 221252190Srpaulo return pos; 222252190Srpaulo *pos = 0x00; 223252190Srpaulo pos++; 224252190Srpaulo 225252190Srpaulo if (len < 7) 226252190Srpaulo return pos; 227252190Srpaulo *pos = 0x00; 228252190Srpaulo if (hapd->conf->ssid.utf8_ssid) 229252190Srpaulo *pos |= 0x01; /* Bit 48 - UTF-8 SSID */ 230252190Srpaulo pos++; 231252190Srpaulo 232252190Srpaulo return pos; 233252190Srpaulo} 234252190Srpaulo 235252190Srpaulo 236252190Srpaulou8 * hostapd_eid_interworking(struct hostapd_data *hapd, u8 *eid) 237252190Srpaulo{ 238252190Srpaulo u8 *pos = eid; 239252190Srpaulo#ifdef CONFIG_INTERWORKING 240252190Srpaulo u8 *len; 241252190Srpaulo 242252190Srpaulo if (!hapd->conf->interworking) 243252190Srpaulo return eid; 244252190Srpaulo 245252190Srpaulo *pos++ = WLAN_EID_INTERWORKING; 246252190Srpaulo len = pos++; 247252190Srpaulo 248252190Srpaulo *pos = hapd->conf->access_network_type; 249252190Srpaulo if (hapd->conf->internet) 250252190Srpaulo *pos |= INTERWORKING_ANO_INTERNET; 251252190Srpaulo if (hapd->conf->asra) 252252190Srpaulo *pos |= INTERWORKING_ANO_ASRA; 253252190Srpaulo if (hapd->conf->esr) 254252190Srpaulo *pos |= INTERWORKING_ANO_ESR; 255252190Srpaulo if (hapd->conf->uesa) 256252190Srpaulo *pos |= INTERWORKING_ANO_UESA; 257252190Srpaulo pos++; 258252190Srpaulo 259252190Srpaulo if (hapd->conf->venue_info_set) { 260252190Srpaulo *pos++ = hapd->conf->venue_group; 261252190Srpaulo *pos++ = hapd->conf->venue_type; 262252190Srpaulo } 263252190Srpaulo 264252190Srpaulo if (!is_zero_ether_addr(hapd->conf->hessid)) { 265252190Srpaulo os_memcpy(pos, hapd->conf->hessid, ETH_ALEN); 266252190Srpaulo pos += ETH_ALEN; 267252190Srpaulo } 268252190Srpaulo 269252190Srpaulo *len = pos - len - 1; 270252190Srpaulo#endif /* CONFIG_INTERWORKING */ 271252190Srpaulo 272252190Srpaulo return pos; 273252190Srpaulo} 274252190Srpaulo 275252190Srpaulo 276252190Srpaulou8 * hostapd_eid_adv_proto(struct hostapd_data *hapd, u8 *eid) 277252190Srpaulo{ 278252190Srpaulo u8 *pos = eid; 279252190Srpaulo#ifdef CONFIG_INTERWORKING 280252190Srpaulo 281252190Srpaulo /* TODO: Separate configuration for ANQP? */ 282252190Srpaulo if (!hapd->conf->interworking) 283252190Srpaulo return eid; 284252190Srpaulo 285252190Srpaulo *pos++ = WLAN_EID_ADV_PROTO; 286252190Srpaulo *pos++ = 2; 287252190Srpaulo *pos++ = 0x7F; /* Query Response Length Limit | PAME-BI */ 288252190Srpaulo *pos++ = ACCESS_NETWORK_QUERY_PROTOCOL; 289252190Srpaulo#endif /* CONFIG_INTERWORKING */ 290252190Srpaulo 291252190Srpaulo return pos; 292252190Srpaulo} 293252190Srpaulo 294252190Srpaulo 295252190Srpaulou8 * hostapd_eid_roaming_consortium(struct hostapd_data *hapd, u8 *eid) 296252190Srpaulo{ 297252190Srpaulo u8 *pos = eid; 298252190Srpaulo#ifdef CONFIG_INTERWORKING 299252190Srpaulo u8 *len; 300252190Srpaulo unsigned int i, count; 301252190Srpaulo 302252190Srpaulo if (!hapd->conf->interworking || 303252190Srpaulo hapd->conf->roaming_consortium == NULL || 304252190Srpaulo hapd->conf->roaming_consortium_count == 0) 305252190Srpaulo return eid; 306252190Srpaulo 307252190Srpaulo *pos++ = WLAN_EID_ROAMING_CONSORTIUM; 308252190Srpaulo len = pos++; 309252190Srpaulo 310252190Srpaulo /* Number of ANQP OIs (in addition to the max 3 listed here) */ 311252190Srpaulo if (hapd->conf->roaming_consortium_count > 3 + 255) 312252190Srpaulo *pos++ = 255; 313252190Srpaulo else if (hapd->conf->roaming_consortium_count > 3) 314252190Srpaulo *pos++ = hapd->conf->roaming_consortium_count - 3; 315252190Srpaulo else 316252190Srpaulo *pos++ = 0; 317252190Srpaulo 318252190Srpaulo /* OU #1 and #2 Lengths */ 319252190Srpaulo *pos = hapd->conf->roaming_consortium[0].len; 320252190Srpaulo if (hapd->conf->roaming_consortium_count > 1) 321252190Srpaulo *pos |= hapd->conf->roaming_consortium[1].len << 4; 322252190Srpaulo pos++; 323252190Srpaulo 324252190Srpaulo if (hapd->conf->roaming_consortium_count > 3) 325252190Srpaulo count = 3; 326252190Srpaulo else 327252190Srpaulo count = hapd->conf->roaming_consortium_count; 328252190Srpaulo 329252190Srpaulo for (i = 0; i < count; i++) { 330252190Srpaulo os_memcpy(pos, hapd->conf->roaming_consortium[i].oi, 331252190Srpaulo hapd->conf->roaming_consortium[i].len); 332252190Srpaulo pos += hapd->conf->roaming_consortium[i].len; 333252190Srpaulo } 334252190Srpaulo 335252190Srpaulo *len = pos - len - 1; 336252190Srpaulo#endif /* CONFIG_INTERWORKING */ 337252190Srpaulo 338252190Srpaulo return pos; 339252190Srpaulo} 340252190Srpaulo 341252190Srpaulo 342252190Srpaulou8 * hostapd_eid_time_adv(struct hostapd_data *hapd, u8 *eid) 343252190Srpaulo{ 344252190Srpaulo if (hapd->conf->time_advertisement != 2) 345252190Srpaulo return eid; 346252190Srpaulo 347252190Srpaulo if (hapd->time_adv == NULL && 348252190Srpaulo hostapd_update_time_adv(hapd) < 0) 349252190Srpaulo return eid; 350252190Srpaulo 351252190Srpaulo if (hapd->time_adv == NULL) 352252190Srpaulo return eid; 353252190Srpaulo 354252190Srpaulo os_memcpy(eid, wpabuf_head(hapd->time_adv), 355252190Srpaulo wpabuf_len(hapd->time_adv)); 356252190Srpaulo eid += wpabuf_len(hapd->time_adv); 357252190Srpaulo 358252190Srpaulo return eid; 359252190Srpaulo} 360252190Srpaulo 361252190Srpaulo 362252190Srpaulou8 * hostapd_eid_time_zone(struct hostapd_data *hapd, u8 *eid) 363252190Srpaulo{ 364252190Srpaulo size_t len; 365252190Srpaulo 366252190Srpaulo if (hapd->conf->time_advertisement != 2) 367252190Srpaulo return eid; 368252190Srpaulo 369252190Srpaulo len = os_strlen(hapd->conf->time_zone); 370252190Srpaulo 371252190Srpaulo *eid++ = WLAN_EID_TIME_ZONE; 372252190Srpaulo *eid++ = len; 373252190Srpaulo os_memcpy(eid, hapd->conf->time_zone, len); 374252190Srpaulo eid += len; 375252190Srpaulo 376252190Srpaulo return eid; 377252190Srpaulo} 378252190Srpaulo 379252190Srpaulo 380252190Srpauloint hostapd_update_time_adv(struct hostapd_data *hapd) 381252190Srpaulo{ 382252190Srpaulo const int elen = 2 + 1 + 10 + 5 + 1; 383252190Srpaulo struct os_time t; 384252190Srpaulo struct os_tm tm; 385252190Srpaulo u8 *pos; 386252190Srpaulo 387252190Srpaulo if (hapd->conf->time_advertisement != 2) 388252190Srpaulo return 0; 389252190Srpaulo 390252190Srpaulo if (os_get_time(&t) < 0 || os_gmtime(t.sec, &tm) < 0) 391252190Srpaulo return -1; 392252190Srpaulo 393252190Srpaulo if (!hapd->time_adv) { 394252190Srpaulo hapd->time_adv = wpabuf_alloc(elen); 395252190Srpaulo if (hapd->time_adv == NULL) 396252190Srpaulo return -1; 397252190Srpaulo pos = wpabuf_put(hapd->time_adv, elen); 398252190Srpaulo } else 399252190Srpaulo pos = wpabuf_mhead_u8(hapd->time_adv); 400252190Srpaulo 401252190Srpaulo *pos++ = WLAN_EID_TIME_ADVERTISEMENT; 402252190Srpaulo *pos++ = 1 + 10 + 5 + 1; 403252190Srpaulo 404252190Srpaulo *pos++ = 2; /* UTC time at which the TSF timer is 0 */ 405252190Srpaulo 406252190Srpaulo /* Time Value at TSF 0 */ 407252190Srpaulo /* FIX: need to calculate this based on the current TSF value */ 408252190Srpaulo WPA_PUT_LE16(pos, tm.year); /* Year */ 409252190Srpaulo pos += 2; 410252190Srpaulo *pos++ = tm.month; /* Month */ 411252190Srpaulo *pos++ = tm.day; /* Day of month */ 412252190Srpaulo *pos++ = tm.hour; /* Hours */ 413252190Srpaulo *pos++ = tm.min; /* Minutes */ 414252190Srpaulo *pos++ = tm.sec; /* Seconds */ 415252190Srpaulo WPA_PUT_LE16(pos, 0); /* Milliseconds (not used) */ 416252190Srpaulo pos += 2; 417252190Srpaulo *pos++ = 0; /* Reserved */ 418252190Srpaulo 419252190Srpaulo /* Time Error */ 420252190Srpaulo /* TODO: fill in an estimate on the error */ 421252190Srpaulo *pos++ = 0; 422252190Srpaulo *pos++ = 0; 423252190Srpaulo *pos++ = 0; 424252190Srpaulo *pos++ = 0; 425252190Srpaulo *pos++ = 0; 426252190Srpaulo 427252190Srpaulo *pos++ = hapd->time_update_counter++; 428252190Srpaulo 429252190Srpaulo return 0; 430252190Srpaulo} 431252190Srpaulo 432252190Srpaulo 433252190Srpaulou8 * hostapd_eid_bss_max_idle_period(struct hostapd_data *hapd, u8 *eid) 434252190Srpaulo{ 435252190Srpaulo u8 *pos = eid; 436252190Srpaulo 437252190Srpaulo#ifdef CONFIG_WNM 438252190Srpaulo if (hapd->conf->ap_max_inactivity > 0) { 439252190Srpaulo unsigned int val; 440252190Srpaulo *pos++ = WLAN_EID_BSS_MAX_IDLE_PERIOD; 441252190Srpaulo *pos++ = 3; 442252190Srpaulo val = hapd->conf->ap_max_inactivity; 443252190Srpaulo if (val > 68000) 444252190Srpaulo val = 68000; 445252190Srpaulo val *= 1000; 446252190Srpaulo val /= 1024; 447252190Srpaulo if (val == 0) 448252190Srpaulo val = 1; 449252190Srpaulo if (val > 65535) 450252190Srpaulo val = 65535; 451252190Srpaulo WPA_PUT_LE16(pos, val); 452252190Srpaulo pos += 2; 453252190Srpaulo *pos++ = 0x00; /* TODO: Protected Keep-Alive Required */ 454252190Srpaulo } 455252190Srpaulo#endif /* CONFIG_WNM */ 456252190Srpaulo 457252190Srpaulo return pos; 458252190Srpaulo} 459