contrib/hostapd/src/ap/ieee802_11_shared.c

   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
  22 u8 * 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 */
  49 void 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
  76 static 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
 114 void 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
 167 static 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
 211 u8 * 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
 255 u8 * 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
 272 u8 * 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
 312 u8 * 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
 331 u8 * 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
 378 u8 * 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
 398 u8 * 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
 416 int 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
 469 u8 * 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 }