wpa_supplicant/mlme.c

   1 /*
   2  * WPA Supplicant - Client mode MLME
   3  * Copyright (c) 2003-2008, Jouni Malinen <j@w1.fi>
   4  * Copyright (c) 2004, Instant802 Networks, Inc.
   5  * Copyright (c) 2005-2006, Devicescape Software, Inc.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  *
  11  * Alternatively, this software may be distributed under the terms of BSD
  12  * license.
  13  *
  14  * See README and COPYING for more details.
  15  */
  16
  17 #include "includes.h"
  18
  19 #include "common.h"
  20 #include "eloop.h"
  21 #include "config_ssid.h"
  22 #include "wpa_supplicant_i.h"
  23 #include "notify.h"
  24 #include "driver_i.h"
  25 #include "rsn_supp/wpa.h"
  26 #include "common/ieee802_11_defs.h"
  27 #include "common/ieee802_11_common.h"
  28 #include "mlme.h"
  29
  30
  31 /* Timeouts and intervals in milliseconds */
  32 #define IEEE80211_AUTH_TIMEOUT (200)
  33 #define IEEE80211_AUTH_MAX_TRIES 3
  34 #define IEEE80211_ASSOC_TIMEOUT (200)
  35 #define IEEE80211_ASSOC_MAX_TRIES 3
  36 #define IEEE80211_MONITORING_INTERVAL (2000)
  37 #define IEEE80211_PROBE_INTERVAL (60000)
  38 #define IEEE80211_RETRY_AUTH_INTERVAL (1000)
  39 #define IEEE80211_SCAN_INTERVAL (2000)
  40 #define IEEE80211_SCAN_INTERVAL_SLOW (15000)
  41 #define IEEE80211_IBSS_JOIN_TIMEOUT (20000)
  42
  43 #define IEEE80211_PROBE_DELAY (33)
  44 #define IEEE80211_CHANNEL_TIME (33)
  45 #define IEEE80211_PASSIVE_CHANNEL_TIME (200)
  46 #define IEEE80211_SCAN_RESULT_EXPIRE (10000)
  47 #define IEEE80211_IBSS_MERGE_INTERVAL (30000)
  48 #define IEEE80211_IBSS_INACTIVITY_LIMIT (60000)
  49
  50 #define IEEE80211_IBSS_MAX_STA_ENTRIES 128
  51
  52
  53 #define IEEE80211_FC(type, stype) host_to_le16((type << 2) | (stype << 4))
  54
  55
  56 struct ieee80211_sta_bss {
  57         struct ieee80211_sta_bss *next;
  58         struct ieee80211_sta_bss *hnext;
  59
  60         u8 bssid[ETH_ALEN];
  61         u8 ssid[MAX_SSID_LEN];
  62         size_t ssid_len;
  63         u16 capability; /* host byte order */
  64         int hw_mode;
  65         int channel;
  66         int freq;
  67         int rssi;
  68         u8 *ie;
  69         size_t ie_len;
  70         u8 *wpa_ie;
  71         size_t wpa_ie_len;
  72         u8 *rsn_ie;
  73         size_t rsn_ie_len;
  74         u8 *wmm_ie;
  75         size_t wmm_ie_len;
  76         u8 *mdie;
  77         size_t mdie_len;
  78 #define IEEE80211_MAX_SUPP_RATES 32
  79         u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
  80         size_t supp_rates_len;
  81         int beacon_int;
  82         u64 timestamp;
  83
  84         int probe_resp;
  85         struct os_time last_update;
  86 };
  87
  88
  89 static void ieee80211_send_probe_req(struct wpa_supplicant *wpa_s,
  90                                      const u8 *dst,
  91                                      const u8 *ssid, size_t ssid_len);
  92 static struct ieee80211_sta_bss *
  93 ieee80211_bss_get(struct wpa_supplicant *wpa_s, const u8 *bssid);
  94 static int ieee80211_sta_find_ibss(struct wpa_supplicant *wpa_s);
  95 static int ieee80211_sta_wep_configured(struct wpa_supplicant *wpa_s);
  96 static void ieee80211_sta_timer(void *eloop_ctx, void *timeout_ctx);
  97 static void ieee80211_sta_scan_timer(void *eloop_ctx, void *timeout_ctx);
  98 static void ieee80211_build_tspec(struct wpabuf *buf);
  99 static int ieee80211_sta_set_probe_req_ie(struct wpa_supplicant *wpa_s,
 100                                           const u8 *ies, size_t ies_len);
 101
 102
 103 static int ieee80211_sta_set_channel(struct wpa_supplicant *wpa_s,
 104                                      enum hostapd_hw_mode phymode, int chan,
 105                                      int freq)
 106 {
 107         size_t i;
 108         struct hostapd_hw_modes *mode;
 109
 110         for (i = 0; i < wpa_s->mlme.num_modes; i++) {
 111                 mode = &wpa_s->mlme.modes[i];
 112                 if (mode->mode == phymode) {
 113                         wpa_s->mlme.curr_rates = mode->rates;
 114                         wpa_s->mlme.num_curr_rates = mode->num_rates;
 115                         break;
 116                 }
 117         }
 118
 119         return wpa_drv_set_channel(wpa_s, phymode, chan, freq);
 120 }
 121
 122
 123 static int ecw2cw(int ecw)
 124 {
 125         int cw = 1;
 126         while (ecw > 0) {
 127                 cw <<= 1;
 128                 ecw--;
 129         }
 130         return cw - 1;
 131 }
 132
 133
 134 static void ieee80211_sta_wmm_params(struct wpa_supplicant *wpa_s,
 135                                      const u8 *wmm_param, size_t wmm_param_len)
 136 {
 137         size_t left;
 138         int count;
 139         const u8 *pos;
 140         u8 wmm_acm;
 141
 142         if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
 143                 return;
 144         count = wmm_param[6] & 0x0f;
 145         if (count == wpa_s->mlme.wmm_last_param_set)
 146                 return;
 147         wpa_s->mlme.wmm_last_param_set = count;
 148
 149         pos = wmm_param + 8;
 150         left = wmm_param_len - 8;
 151
 152         wmm_acm = 0;
 153         for (; left >= 4; left -= 4, pos += 4) {
 154                 int aci = (pos[0] >> 5) & 0x03;
 155                 int acm = (pos[0] >> 4) & 0x01;
 156                 int aifs, cw_max, cw_min, burst_time;
 157
 158                 switch (aci) {
 159                 case 1: /* AC_BK */
 160                         if (acm)
 161                                 wmm_acm |= BIT(1) | BIT(2); /* BK/- */
 162                         break;
 163                 case 2: /* AC_VI */
 164                         if (acm)
 165                                 wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
 166                         break;
 167                 case 3: /* AC_VO */
 168                         if (acm)
 169                                 wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
 170                         break;
 171                 case 0: /* AC_BE */
 172                 default:
 173                         if (acm)
 174                                 wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
 175                         break;
 176                 }
 177
 178                 aifs = pos[0] & 0x0f;
 179                 cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
 180                 cw_min = ecw2cw(pos[1] & 0x0f);
 181                 /* TXOP is in units of 32 usec; burst_time in 0.1 ms */
 182                 burst_time = (pos[2] | (pos[3] << 8)) * 32 / 100;
 183                 wpa_printf(MSG_DEBUG, "MLME: WMM aci=%d acm=%d aifs=%d "
 184                            "cWmin=%d cWmax=%d burst=%d",
 185                            aci, acm, aifs, cw_min, cw_max, burst_time);
 186                 /* TODO: driver configuration */
 187         }
 188 }
 189
 190
 191 static void ieee80211_set_associated(struct wpa_supplicant *wpa_s, int assoc)
 192 {
 193         if (wpa_s->mlme.associated == assoc && !assoc)
 194                 return;
 195
 196         wpa_s->mlme.associated = assoc;
 197
 198         if (assoc) {
 199                 union wpa_event_data data;
 200                 os_memset(&data, 0, sizeof(data));
 201                 wpa_s->mlme.prev_bssid_set = 1;
 202                 os_memcpy(wpa_s->mlme.prev_bssid, wpa_s->bssid, ETH_ALEN);
 203                 data.assoc_info.req_ies = wpa_s->mlme.assocreq_ies;
 204                 data.assoc_info.req_ies_len = wpa_s->mlme.assocreq_ies_len;
 205                 data.assoc_info.resp_ies = wpa_s->mlme.assocresp_ies;
 206                 data.assoc_info.resp_ies_len = wpa_s->mlme.assocresp_ies_len;
 207                 data.assoc_info.freq = wpa_s->mlme.freq;
 208                 wpa_supplicant_event(wpa_s, EVENT_ASSOC, &data);
 209         } else {
 210                 wpa_supplicant_event(wpa_s, EVENT_DISASSOC, NULL);
 211         }
 212         os_get_time(&wpa_s->mlme.last_probe);
 213 }
 214
 215
 216 static int ieee80211_sta_tx(struct wpa_supplicant *wpa_s, const u8 *buf,
 217                             size_t len)
 218 {
 219         return wpa_drv_send_mlme(wpa_s, buf, len);
 220 }
 221
 222
 223 static void ieee80211_send_auth(struct wpa_supplicant *wpa_s,
 224                                 int transaction, const u8 *extra,
 225                                 size_t extra_len, int encrypt)
 226 {
 227         u8 *buf;
 228         size_t len;
 229         struct ieee80211_mgmt *mgmt;
 230
 231         buf = os_malloc(sizeof(*mgmt) + 6 + extra_len);
 232         if (buf == NULL) {
 233                 wpa_printf(MSG_DEBUG, "MLME: failed to allocate buffer for "
 234                            "auth frame");
 235                 return;
 236         }
 237
 238         mgmt = (struct ieee80211_mgmt *) buf;
 239         len = 24 + 6;
 240         os_memset(mgmt, 0, 24 + 6);
 241         mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 242                                            WLAN_FC_STYPE_AUTH);
 243         if (encrypt)
 244                 mgmt->frame_control |= host_to_le16(WLAN_FC_ISWEP);
 245         os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
 246         os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
 247         os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
 248         mgmt->u.auth.auth_alg = host_to_le16(wpa_s->mlme.auth_alg);
 249         mgmt->u.auth.auth_transaction = host_to_le16(transaction);
 250         wpa_s->mlme.auth_transaction = transaction + 1;
 251         mgmt->u.auth.status_code = host_to_le16(0);
 252         if (extra) {
 253                 os_memcpy(buf + len, extra, extra_len);
 254                 len += extra_len;
 255         }
 256
 257         ieee80211_sta_tx(wpa_s, buf, len);
 258         os_free(buf);
 259 }
 260
 261
 262 static void ieee80211_reschedule_timer(struct wpa_supplicant *wpa_s, int ms)
 263 {
 264         eloop_cancel_timeout(ieee80211_sta_timer, wpa_s, NULL);
 265         eloop_register_timeout(ms / 1000, 1000 * (ms % 1000),
 266                                ieee80211_sta_timer, wpa_s, NULL);
 267 }
 268
 269
 270 static void ieee80211_authenticate(struct wpa_supplicant *wpa_s)
 271 {
 272         u8 *extra;
 273         size_t extra_len;
 274
 275         wpa_s->mlme.auth_tries++;
 276         if (wpa_s->mlme.auth_tries > IEEE80211_AUTH_MAX_TRIES) {
 277                 wpa_printf(MSG_DEBUG, "MLME: authentication with AP " MACSTR
 278                            " timed out", MAC2STR(wpa_s->bssid));
 279                 return;
 280         }
 281
 282         wpa_s->mlme.state = IEEE80211_AUTHENTICATE;
 283         wpa_printf(MSG_DEBUG, "MLME: authenticate with AP " MACSTR,
 284                    MAC2STR(wpa_s->bssid));
 285
 286         extra = NULL;
 287         extra_len = 0;
 288
 289 #ifdef CONFIG_IEEE80211R
 290         if ((wpa_s->mlme.key_mgmt == KEY_MGMT_FT_802_1X ||
 291              wpa_s->mlme.key_mgmt == KEY_MGMT_FT_PSK) &&
 292             wpa_s->mlme.ft_ies) {
 293                 struct ieee80211_sta_bss *bss;
 294                 struct rsn_mdie *mdie = NULL;
 295                 bss = ieee80211_bss_get(wpa_s, wpa_s->bssid);
 296                 if (bss && bss->mdie_len >= 2 + sizeof(*mdie))
 297                         mdie = (struct rsn_mdie *) (bss->mdie + 2);
 298                 if (mdie &&
 299                     os_memcmp(mdie->mobility_domain, wpa_s->mlme.current_md,
 300                               MOBILITY_DOMAIN_ID_LEN) == 0) {
 301                         wpa_printf(MSG_DEBUG, "MLME: Trying to use FT "
 302                                    "over-the-air");
 303                         wpa_s->mlme.auth_alg = WLAN_AUTH_FT;
 304                         extra = wpa_s->mlme.ft_ies;
 305                         extra_len = wpa_s->mlme.ft_ies_len;
 306                 }
 307         }
 308 #endif /* CONFIG_IEEE80211R */
 309
 310         ieee80211_send_auth(wpa_s, 1, extra, extra_len, 0);
 311
 312         ieee80211_reschedule_timer(wpa_s, IEEE80211_AUTH_TIMEOUT);
 313 }
 314
 315
 316 static void ieee80211_send_assoc(struct wpa_supplicant *wpa_s)
 317 {
 318         struct ieee80211_mgmt *mgmt;
 319         u8 *pos, *ies, *buf;
 320         int i, len;
 321         u16 capab;
 322         struct ieee80211_sta_bss *bss;
 323         int wmm = 0;
 324         size_t blen, buflen;
 325
 326         if (wpa_s->mlme.curr_rates == NULL) {
 327                 wpa_printf(MSG_DEBUG, "MLME: curr_rates not set for assoc");
 328                 return;
 329         }
 330
 331         buflen = sizeof(*mgmt) + 200 + wpa_s->mlme.extra_ie_len +
 332                 wpa_s->mlme.ssid_len;
 333 #ifdef CONFIG_IEEE80211R
 334         if (wpa_s->mlme.ft_ies)
 335                 buflen += wpa_s->mlme.ft_ies_len;
 336 #endif /* CONFIG_IEEE80211R */
 337         buf = os_malloc(buflen);
 338         if (buf == NULL) {
 339                 wpa_printf(MSG_DEBUG, "MLME: failed to allocate buffer for "
 340                            "assoc frame");
 341                 return;
 342         }
 343         blen = 0;
 344
 345         capab = wpa_s->mlme.capab;
 346         if (wpa_s->mlme.phymode == HOSTAPD_MODE_IEEE80211G) {
 347                 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME |
 348                         WLAN_CAPABILITY_SHORT_PREAMBLE;
 349         }
 350         bss = ieee80211_bss_get(wpa_s, wpa_s->bssid);
 351         if (bss) {
 352                 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
 353                         capab |= WLAN_CAPABILITY_PRIVACY;
 354                 if (bss->wmm_ie) {
 355                         wmm = 1;
 356                 }
 357         }
 358
 359         mgmt = (struct ieee80211_mgmt *) buf;
 360         blen += 24;
 361         os_memset(mgmt, 0, 24);
 362         os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
 363         os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
 364         os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
 365
 366         if (wpa_s->mlme.prev_bssid_set) {
 367                 blen += 10;
 368                 mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 369                                                    WLAN_FC_STYPE_REASSOC_REQ);
 370                 mgmt->u.reassoc_req.capab_info = host_to_le16(capab);
 371                 mgmt->u.reassoc_req.listen_interval = host_to_le16(1);
 372                 os_memcpy(mgmt->u.reassoc_req.current_ap,
 373                           wpa_s->mlme.prev_bssid,
 374                           ETH_ALEN);
 375         } else {
 376                 blen += 4;
 377                 mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 378                                                    WLAN_FC_STYPE_ASSOC_REQ);
 379                 mgmt->u.assoc_req.capab_info = host_to_le16(capab);
 380                 mgmt->u.assoc_req.listen_interval = host_to_le16(1);
 381         }
 382
 383         /* SSID */
 384         ies = pos = buf + blen;
 385         blen += 2 + wpa_s->mlme.ssid_len;
 386         *pos++ = WLAN_EID_SSID;
 387         *pos++ = wpa_s->mlme.ssid_len;
 388         os_memcpy(pos, wpa_s->mlme.ssid, wpa_s->mlme.ssid_len);
 389
 390         len = wpa_s->mlme.num_curr_rates;
 391         if (len > 8)
 392                 len = 8;
 393         pos = buf + blen;
 394         blen += len + 2;
 395         *pos++ = WLAN_EID_SUPP_RATES;
 396         *pos++ = len;
 397         for (i = 0; i < len; i++)
 398                 *pos++ = (u8) (wpa_s->mlme.curr_rates[i] / 5);
 399
 400         if (wpa_s->mlme.num_curr_rates > len) {
 401                 pos = buf + blen;
 402                 blen += wpa_s->mlme.num_curr_rates - len + 2;
 403                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
 404                 *pos++ = wpa_s->mlme.num_curr_rates - len;
 405                 for (i = len; i < wpa_s->mlme.num_curr_rates; i++)
 406                         *pos++ = (u8) (wpa_s->mlme.curr_rates[i] / 5);
 407         }
 408
 409         if (wpa_s->mlme.extra_ie && wpa_s->mlme.auth_alg != WLAN_AUTH_FT) {
 410                 pos = buf + blen;
 411                 blen += wpa_s->mlme.extra_ie_len;
 412                 os_memcpy(pos, wpa_s->mlme.extra_ie, wpa_s->mlme.extra_ie_len);
 413         }
 414
 415 #ifdef CONFIG_IEEE80211R
 416         if ((wpa_s->mlme.key_mgmt == KEY_MGMT_FT_802_1X ||
 417              wpa_s->mlme.key_mgmt == KEY_MGMT_FT_PSK) &&
 418             wpa_s->mlme.auth_alg != WLAN_AUTH_FT &&
 419             bss && bss->mdie &&
 420             bss->mdie_len >= 2 + sizeof(struct rsn_mdie) &&
 421             bss->mdie[1] >= sizeof(struct rsn_mdie)) {
 422                 pos = buf + blen;
 423                 blen += 2 + sizeof(struct rsn_mdie);
 424                 *pos++ = WLAN_EID_MOBILITY_DOMAIN;
 425                 *pos++ = sizeof(struct rsn_mdie);
 426                 os_memcpy(pos, bss->mdie + 2, MOBILITY_DOMAIN_ID_LEN);
 427                 pos += MOBILITY_DOMAIN_ID_LEN;
 428                 *pos++ = 0; /* FIX: copy from the target AP's MDIE */
 429         }
 430
 431         if ((wpa_s->mlme.key_mgmt == KEY_MGMT_FT_802_1X ||
 432              wpa_s->mlme.key_mgmt == KEY_MGMT_FT_PSK) &&
 433             wpa_s->mlme.auth_alg == WLAN_AUTH_FT && wpa_s->mlme.ft_ies) {
 434                 pos = buf + blen;
 435                 os_memcpy(pos, wpa_s->mlme.ft_ies, wpa_s->mlme.ft_ies_len);
 436                 pos += wpa_s->mlme.ft_ies_len;
 437                 blen += wpa_s->mlme.ft_ies_len;
 438         }
 439 #endif /* CONFIG_IEEE80211R */
 440
 441         if (wmm && wpa_s->mlme.wmm_enabled) {
 442                 pos = buf + blen;
 443                 blen += 9;
 444                 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
 445                 *pos++ = 7; /* len */
 446                 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
 447                 *pos++ = 0x50;
 448                 *pos++ = 0xf2;
 449                 *pos++ = 2; /* WMM */
 450                 *pos++ = 0; /* WMM info */
 451                 *pos++ = 1; /* WMM ver */
 452                 *pos++ = 0;
 453         }
 454
 455         os_free(wpa_s->mlme.assocreq_ies);
 456         wpa_s->mlme.assocreq_ies_len = (buf + blen) - ies;
 457         wpa_s->mlme.assocreq_ies = os_malloc(wpa_s->mlme.assocreq_ies_len);
 458         if (wpa_s->mlme.assocreq_ies) {
 459                 os_memcpy(wpa_s->mlme.assocreq_ies, ies,
 460                           wpa_s->mlme.assocreq_ies_len);
 461         }
 462
 463         ieee80211_sta_tx(wpa_s, buf, blen);
 464         os_free(buf);
 465 }
 466
 467
 468 static void ieee80211_send_deauth(struct wpa_supplicant *wpa_s, u16 reason)
 469 {
 470         u8 *buf;
 471         size_t len;
 472         struct ieee80211_mgmt *mgmt;
 473
 474         buf = os_zalloc(sizeof(*mgmt));
 475         if (buf == NULL) {
 476                 wpa_printf(MSG_DEBUG, "MLME: failed to allocate buffer for "
 477                            "deauth frame");
 478                 return;
 479         }
 480
 481         mgmt = (struct ieee80211_mgmt *) buf;
 482         len = 24;
 483         os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
 484         os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
 485         os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
 486         mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 487                                            WLAN_FC_STYPE_DEAUTH);
 488         len += 2;
 489         mgmt->u.deauth.reason_code = host_to_le16(reason);
 490
 491         ieee80211_sta_tx(wpa_s, buf, len);
 492         os_free(buf);
 493 }
 494
 495
 496 static void ieee80211_send_disassoc(struct wpa_supplicant *wpa_s, u16 reason)
 497 {
 498         u8 *buf;
 499         size_t len;
 500         struct ieee80211_mgmt *mgmt;
 501
 502         buf = os_zalloc(sizeof(*mgmt));
 503         if (buf == NULL) {
 504                 wpa_printf(MSG_DEBUG, "MLME: failed to allocate buffer for "
 505                            "disassoc frame");
 506                 return;
 507         }
 508
 509         mgmt = (struct ieee80211_mgmt *) buf;
 510         len = 24;
 511         os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
 512         os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
 513         os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
 514         mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 515                                            WLAN_FC_STYPE_DISASSOC);
 516         len += 2;
 517         mgmt->u.disassoc.reason_code = host_to_le16(reason);
 518
 519         ieee80211_sta_tx(wpa_s, buf, len);
 520         os_free(buf);
 521 }
 522
 523
 524 static int ieee80211_privacy_mismatch(struct wpa_supplicant *wpa_s)
 525 {
 526         struct ieee80211_sta_bss *bss;
 527         int res = 0;
 528
 529         if (wpa_s->mlme.mixed_cell ||
 530             wpa_s->mlme.key_mgmt != KEY_MGMT_NONE)
 531                 return 0;
 532
 533         bss = ieee80211_bss_get(wpa_s, wpa_s->bssid);
 534         if (bss == NULL)
 535                 return 0;
 536
 537         if (ieee80211_sta_wep_configured(wpa_s) !=
 538             !!(bss->capability & WLAN_CAPABILITY_PRIVACY))
 539                 res = 1;
 540
 541         return res;
 542 }
 543
 544
 545 static void ieee80211_associate(struct wpa_supplicant *wpa_s)
 546 {
 547         wpa_s->mlme.assoc_tries++;
 548         if (wpa_s->mlme.assoc_tries > IEEE80211_ASSOC_MAX_TRIES) {
 549                 wpa_printf(MSG_DEBUG, "MLME: association with AP " MACSTR
 550                            " timed out", MAC2STR(wpa_s->bssid));
 551                 return;
 552         }
 553
 554         wpa_s->mlme.state = IEEE80211_ASSOCIATE;
 555         wpa_printf(MSG_DEBUG, "MLME: associate with AP " MACSTR,
 556                    MAC2STR(wpa_s->bssid));
 557         if (ieee80211_privacy_mismatch(wpa_s)) {
 558                 wpa_printf(MSG_DEBUG, "MLME: mismatch in privacy "
 559                            "configuration and mixed-cell disabled - abort "
 560                            "association");
 561                 return;
 562         }
 563
 564         ieee80211_send_assoc(wpa_s);
 565
 566         ieee80211_reschedule_timer(wpa_s, IEEE80211_ASSOC_TIMEOUT);
 567 }
 568
 569
 570 static void ieee80211_associated(struct wpa_supplicant *wpa_s)
 571 {
 572         int disassoc;
 573
 574         /* TODO: start monitoring current AP signal quality and number of
 575          * missed beacons. Scan other channels every now and then and search
 576          * for better APs. */
 577         /* TODO: remove expired BSSes */
 578
 579         wpa_s->mlme.state = IEEE80211_ASSOCIATED;
 580
 581 #if 0 /* FIX */
 582         sta = sta_info_get(local, wpa_s->bssid);
 583         if (sta == NULL) {
 584                 wpa_printf(MSG_DEBUG "MLME: No STA entry for own AP " MACSTR,
 585                            MAC2STR(wpa_s->bssid));
 586                 disassoc = 1;
 587         } else {
 588                 disassoc = 0;
 589                 if (time_after(jiffies,
 590                                sta->last_rx + IEEE80211_MONITORING_INTERVAL)) {
 591                         if (wpa_s->mlme.probereq_poll) {
 592                                 wpa_printf(MSG_DEBUG "MLME: No ProbeResp from "
 593                                            "current AP " MACSTR " - assume "
 594                                            "out of range",
 595                                            MAC2STR(wpa_s->bssid));
 596                                 disassoc = 1;
 597                         } else {
 598                                 ieee80211_send_probe_req(
 599                                         wpa_s->bssid,
 600                                         wpa_s->mlme.scan_ssid,
 601                                         wpa_s->mlme.scan_ssid_len);
 602                                 wpa_s->mlme.probereq_poll = 1;
 603                         }
 604                 } else {
 605                         wpa_s->mlme.probereq_poll = 0;
 606                         if (time_after(jiffies, wpa_s->mlme.last_probe +
 607                                        IEEE80211_PROBE_INTERVAL)) {
 608                                 wpa_s->mlme.last_probe = jiffies;
 609                                 ieee80211_send_probe_req(wpa_s->bssid,
 610                                                          wpa_s->mlme.ssid,
 611                                                          wpa_s->mlme.ssid_len);
 612                         }
 613                 }
 614                 sta_info_release(local, sta);
 615         }
 616 #else
 617         disassoc = 0;
 618 #endif
 619         if (disassoc) {
 620                 wpa_supplicant_event(wpa_s, EVENT_DISASSOC, NULL);
 621                 ieee80211_reschedule_timer(wpa_s,
 622                                            IEEE80211_MONITORING_INTERVAL +
 623                                            30000);
 624         } else {
 625                 ieee80211_reschedule_timer(wpa_s,
 626                                            IEEE80211_MONITORING_INTERVAL);
 627         }
 628 }
 629
 630
 631 static void ieee80211_send_probe_req(struct wpa_supplicant *wpa_s,
 632                                      const u8 *dst,
 633                                      const u8 *ssid, size_t ssid_len)
 634 {
 635         u8 *buf;
 636         size_t len;
 637         struct ieee80211_mgmt *mgmt;
 638         u8 *pos, *supp_rates;
 639         u8 *esupp_rates = NULL;
 640         int i;
 641
 642         buf = os_malloc(sizeof(*mgmt) + 200 + wpa_s->mlme.extra_probe_ie_len);
 643         if (buf == NULL) {
 644                 wpa_printf(MSG_DEBUG, "MLME: failed to allocate buffer for "
 645                            "probe request");
 646                 return;
 647         }
 648
 649         mgmt = (struct ieee80211_mgmt *) buf;
 650         len = 24;
 651         os_memset(mgmt, 0, 24);
 652         mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 653                                            WLAN_FC_STYPE_PROBE_REQ);
 654         os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
 655         if (dst) {
 656                 os_memcpy(mgmt->da, dst, ETH_ALEN);
 657                 os_memcpy(mgmt->bssid, dst, ETH_ALEN);
 658         } else {
 659                 os_memset(mgmt->da, 0xff, ETH_ALEN);
 660                 os_memset(mgmt->bssid, 0xff, ETH_ALEN);
 661         }
 662         pos = buf + len;
 663         len += 2 + ssid_len;
 664         *pos++ = WLAN_EID_SSID;
 665         *pos++ = ssid_len;
 666         os_memcpy(pos, ssid, ssid_len);
 667
 668         supp_rates = buf + len;
 669         len += 2;
 670         supp_rates[0] = WLAN_EID_SUPP_RATES;
 671         supp_rates[1] = 0;
 672         for (i = 0; i < wpa_s->mlme.num_curr_rates; i++) {
 673                 if (esupp_rates) {
 674                         pos = buf + len;
 675                         len++;
 676                         esupp_rates[1]++;
 677                 } else if (supp_rates[1] == 8) {
 678                         esupp_rates = pos;
 679                         esupp_rates[0] = WLAN_EID_EXT_SUPP_RATES;
 680                         esupp_rates[1] = 1;
 681                         pos = &esupp_rates[2];
 682                         len += 3;
 683                 } else {
 684                         pos = buf + len;
 685                         len++;
 686                         supp_rates[1]++;
 687                 }
 688                 *pos++ = wpa_s->mlme.curr_rates[i] / 5;
 689         }
 690
 691         if (wpa_s->mlme.extra_probe_ie) {
 692                 os_memcpy(pos, wpa_s->mlme.extra_probe_ie,
 693                           wpa_s->mlme.extra_probe_ie_len);
 694                 len += wpa_s->mlme.extra_probe_ie_len;
 695         }
 696
 697         ieee80211_sta_tx(wpa_s, buf, len);
 698         os_free(buf);
 699 }
 700
 701
 702 static int ieee80211_sta_wep_configured(struct wpa_supplicant *wpa_s)
 703 {
 704 #if 0 /* FIX */
 705         if (sdata == NULL || sdata->default_key == NULL ||
 706             sdata->default_key->alg != ALG_WEP)
 707                 return 0;
 708         return 1;
 709 #else
 710         return 0;
 711 #endif
 712 }
 713
 714
 715 static void ieee80211_auth_completed(struct wpa_supplicant *wpa_s)
 716 {
 717         wpa_printf(MSG_DEBUG, "MLME: authenticated");
 718         wpa_s->mlme.authenticated = 1;
 719         ieee80211_associate(wpa_s);
 720 }
 721
 722
 723 static void ieee80211_auth_challenge(struct wpa_supplicant *wpa_s,
 724                                      struct ieee80211_mgmt *mgmt,
 725                                      size_t len,
 726                                      struct ieee80211_rx_status *rx_status)
 727 {
 728         u8 *pos;
 729         struct ieee802_11_elems elems;
 730
 731         wpa_printf(MSG_DEBUG, "MLME: replying to auth challenge");
 732         pos = mgmt->u.auth.variable;
 733         if (ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems, 0)
 734             == ParseFailed) {
 735                 wpa_printf(MSG_DEBUG, "MLME: failed to parse Auth(challenge)");
 736                 return;
 737         }
 738         if (elems.challenge == NULL) {
 739                 wpa_printf(MSG_DEBUG, "MLME: no challenge IE in shared key "
 740                            "auth frame");
 741                 return;
 742         }
 743         ieee80211_send_auth(wpa_s, 3, elems.challenge - 2,
 744                             elems.challenge_len + 2, 1);
 745 }
 746
 747
 748 static void ieee80211_rx_mgmt_auth(struct wpa_supplicant *wpa_s,
 749                                    struct ieee80211_mgmt *mgmt,
 750                                    size_t len,
 751                                    struct ieee80211_rx_status *rx_status)
 752 {
 753         struct wpa_ssid *ssid = wpa_s->current_ssid;
 754         u16 auth_alg, auth_transaction, status_code;
 755         int adhoc;
 756
 757         adhoc = ssid && ssid->mode == WPAS_MODE_IBSS;
 758
 759         if (wpa_s->mlme.state != IEEE80211_AUTHENTICATE && !adhoc) {
 760                 wpa_printf(MSG_DEBUG, "MLME: authentication frame received "
 761                            "from " MACSTR ", but not in authenticate state - "
 762                            "ignored", MAC2STR(mgmt->sa));
 763                 return;
 764         }
 765
 766         if (len < 24 + 6) {
 767                 wpa_printf(MSG_DEBUG, "MLME: too short (%lu) authentication "
 768                            "frame received from " MACSTR " - ignored",
 769                            (unsigned long) len, MAC2STR(mgmt->sa));
 770                 return;
 771         }
 772
 773         if (!adhoc && os_memcmp(wpa_s->bssid, mgmt->sa, ETH_ALEN) != 0) {
 774                 wpa_printf(MSG_DEBUG, "MLME: authentication frame received "
 775                            "from unknown AP (SA=" MACSTR " BSSID=" MACSTR
 776                            ") - ignored",
 777                            MAC2STR(mgmt->sa), MAC2STR(mgmt->bssid));
 778                 return;
 779         }
 780
 781         if (adhoc && os_memcmp(wpa_s->bssid, mgmt->bssid, ETH_ALEN) != 0) {
 782                 wpa_printf(MSG_DEBUG, "MLME: authentication frame received "
 783                            "from unknown BSSID (SA=" MACSTR " BSSID=" MACSTR
 784                            ") - ignored",
 785                            MAC2STR(mgmt->sa), MAC2STR(mgmt->bssid));
 786                 return;
 787         }
 788
 789         auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
 790         auth_transaction = le_to_host16(mgmt->u.auth.auth_transaction);
 791         status_code = le_to_host16(mgmt->u.auth.status_code);
 792
 793         wpa_printf(MSG_DEBUG, "MLME: RX authentication from " MACSTR
 794                    " (alg=%d transaction=%d status=%d)",
 795                    MAC2STR(mgmt->sa), auth_alg, auth_transaction, status_code);
 796
 797         if (adhoc) {
 798                 /* IEEE 802.11 standard does not require authentication in IBSS
 799                  * networks and most implementations do not seem to use it.
 800                  * However, try to reply to authentication attempts if someone
 801                  * has actually implemented this.
 802                  * TODO: Could implement shared key authentication. */
 803                 if (auth_alg != WLAN_AUTH_OPEN || auth_transaction != 1) {
 804                         wpa_printf(MSG_DEBUG, "MLME: unexpected IBSS "
 805                                    "authentication frame (alg=%d "
 806                                    "transaction=%d)",
 807                                    auth_alg, auth_transaction);
 808                         return;
 809                 }
 810                 ieee80211_send_auth(wpa_s, 2, NULL, 0, 0);
 811         }
 812
 813         if (auth_alg != wpa_s->mlme.auth_alg ||
 814             auth_transaction != wpa_s->mlme.auth_transaction) {
 815                 wpa_printf(MSG_DEBUG, "MLME: unexpected authentication frame "
 816                            "(alg=%d transaction=%d)",
 817                            auth_alg, auth_transaction);
 818                 return;
 819         }
 820
 821         if (status_code != WLAN_STATUS_SUCCESS) {
 822                 wpa_printf(MSG_DEBUG, "MLME: AP denied authentication "
 823                            "(auth_alg=%d code=%d)", wpa_s->mlme.auth_alg,
 824                            status_code);
 825                 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
 826                         const int num_algs = 3;
 827                         u8 algs[num_algs];
 828                         int i, pos;
 829                         algs[0] = algs[1] = algs[2] = 0xff;
 830                         if (wpa_s->mlme.auth_algs & WPA_AUTH_ALG_OPEN)
 831                                 algs[0] = WLAN_AUTH_OPEN;
 832                         if (wpa_s->mlme.auth_algs & WPA_AUTH_ALG_SHARED)
 833                                 algs[1] = WLAN_AUTH_SHARED_KEY;
 834                         if (wpa_s->mlme.auth_algs & WPA_AUTH_ALG_LEAP)
 835                                 algs[2] = WLAN_AUTH_LEAP;
 836                         if (wpa_s->mlme.auth_alg == WLAN_AUTH_OPEN)
 837                                 pos = 0;
 838                         else if (wpa_s->mlme.auth_alg == WLAN_AUTH_SHARED_KEY)
 839                                 pos = 1;
 840                         else
 841                                 pos = 2;
 842                         for (i = 0; i < num_algs; i++) {
 843                                 pos++;
 844                                 if (pos >= num_algs)
 845                                         pos = 0;
 846                                 if (algs[pos] == wpa_s->mlme.auth_alg ||
 847                                     algs[pos] == 0xff)
 848                                         continue;
 849                                 if (algs[pos] == WLAN_AUTH_SHARED_KEY &&
 850                                     !ieee80211_sta_wep_configured(wpa_s))
 851                                         continue;
 852                                 wpa_s->mlme.auth_alg = algs[pos];
 853                                 wpa_printf(MSG_DEBUG, "MLME: set auth_alg=%d "
 854                                            "for next try",
 855                                            wpa_s->mlme.auth_alg);
 856                                 break;
 857                         }
 858                 }
 859                 return;
 860         }
 861
 862         switch (wpa_s->mlme.auth_alg) {
 863         case WLAN_AUTH_OPEN:
 864         case WLAN_AUTH_LEAP:
 865                 ieee80211_auth_completed(wpa_s);
 866                 break;
 867         case WLAN_AUTH_SHARED_KEY:
 868                 if (wpa_s->mlme.auth_transaction == 4)
 869                         ieee80211_auth_completed(wpa_s);
 870                 else
 871                         ieee80211_auth_challenge(wpa_s, mgmt, len,
 872                                                  rx_status);
 873                 break;
 874 #ifdef CONFIG_IEEE80211R
 875         case WLAN_AUTH_FT:
 876         {
 877                 union wpa_event_data data;
 878                 struct wpabuf *ric = NULL;
 879                 os_memset(&data, 0, sizeof(data));
 880                 data.ft_ies.ies = mgmt->u.auth.variable;
 881                 data.ft_ies.ies_len = len -
 882                         (mgmt->u.auth.variable - (u8 *) mgmt);
 883                 os_memcpy(data.ft_ies.target_ap, wpa_s->bssid, ETH_ALEN);
 884                 if (os_strcmp(wpa_s->driver->name, "test") == 0 &&
 885                     wpa_s->mlme.wmm_enabled) {
 886                         ric = wpabuf_alloc(200);
 887                         if (ric) {
 888                                 /* Build simple RIC-Request: RDIE | TSPEC */
 889
 890                                 /* RIC Data (RDIE) */
 891                                 wpabuf_put_u8(ric, WLAN_EID_RIC_DATA);
 892                                 wpabuf_put_u8(ric, 4);
 893                                 wpabuf_put_u8(ric, 0); /* RDIE Identifier */
 894                                 wpabuf_put_u8(ric, 1); /* Resource Descriptor
 895                                                         * Count */
 896                                 wpabuf_put_le16(ric, 0); /* Status Code */
 897
 898                                 /* WMM TSPEC */
 899                                 ieee80211_build_tspec(ric);
 900
 901                                 data.ft_ies.ric_ies = wpabuf_head(ric);
 902                                 data.ft_ies.ric_ies_len = wpabuf_len(ric);
 903                         }
 904                 }
 905
 906                 wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &data);
 907                 wpabuf_free(ric);
 908                 ieee80211_auth_completed(wpa_s);
 909                 break;
 910         }
 911 #endif /* CONFIG_IEEE80211R */
 912         }
 913 }
 914
 915
 916 static void ieee80211_rx_mgmt_deauth(struct wpa_supplicant *wpa_s,
 917                                      struct ieee80211_mgmt *mgmt,
 918                                      size_t len,
 919                                      struct ieee80211_rx_status *rx_status)
 920 {
 921         u16 reason_code;
 922
 923         if (len < 24 + 2) {
 924                 wpa_printf(MSG_DEBUG, "MLME: too short (%lu) deauthentication "
 925                            "frame received from " MACSTR " - ignored",
 926                            (unsigned long) len, MAC2STR(mgmt->sa));
 927                 return;
 928         }
 929
 930         if (os_memcmp(wpa_s->bssid, mgmt->sa, ETH_ALEN) != 0) {
 931                 wpa_printf(MSG_DEBUG, "MLME: deauthentication frame received "
 932                            "from unknown AP (SA=" MACSTR " BSSID=" MACSTR
 933                            ") - ignored",
 934                            MAC2STR(mgmt->sa), MAC2STR(mgmt->bssid));
 935                 return;
 936         }
 937
 938         reason_code = le_to_host16(mgmt->u.deauth.reason_code);
 939
 940         wpa_printf(MSG_DEBUG, "MLME: RX deauthentication from " MACSTR
 941                    " (reason=%d)", MAC2STR(mgmt->sa), reason_code);
 942
 943         if (wpa_s->mlme.authenticated)
 944                 wpa_printf(MSG_DEBUG, "MLME: deauthenticated");
 945
 946         if (wpa_s->mlme.state == IEEE80211_AUTHENTICATE ||
 947             wpa_s->mlme.state == IEEE80211_ASSOCIATE ||
 948             wpa_s->mlme.state == IEEE80211_ASSOCIATED) {
 949                 wpa_s->mlme.state = IEEE80211_AUTHENTICATE;
 950                 ieee80211_reschedule_timer(wpa_s,
 951                                            IEEE80211_RETRY_AUTH_INTERVAL);
 952         }
 953
 954         ieee80211_set_associated(wpa_s, 0);
 955         wpa_s->mlme.authenticated = 0;
 956 }
 957
 958
 959 static void ieee80211_rx_mgmt_disassoc(struct wpa_supplicant *wpa_s,
 960                                        struct ieee80211_mgmt *mgmt,
 961                                        size_t len,
 962                                        struct ieee80211_rx_status *rx_status)
 963 {
 964         u16 reason_code;
 965
 966         if (len < 24 + 2) {
 967                 wpa_printf(MSG_DEBUG, "MLME: too short (%lu) disassociation "
 968                            "frame received from " MACSTR " - ignored",
 969                            (unsigned long) len, MAC2STR(mgmt->sa));
 970                 return;
 971         }
 972
 973         if (os_memcmp(wpa_s->bssid, mgmt->sa, ETH_ALEN) != 0) {
 974                 wpa_printf(MSG_DEBUG, "MLME: disassociation frame received "
 975                            "from unknown AP (SA=" MACSTR " BSSID=" MACSTR
 976                            ") - ignored",
 977                            MAC2STR(mgmt->sa), MAC2STR(mgmt->bssid));
 978                 return;
 979         }
 980
 981         reason_code = le_to_host16(mgmt->u.disassoc.reason_code);
 982
 983         wpa_printf(MSG_DEBUG, "MLME: RX disassociation from " MACSTR
 984                    " (reason=%d)", MAC2STR(mgmt->sa), reason_code);
 985
 986         if (wpa_s->mlme.associated)
 987                 wpa_printf(MSG_DEBUG, "MLME: disassociated");
 988
 989         if (wpa_s->mlme.state == IEEE80211_ASSOCIATED) {
 990                 wpa_s->mlme.state = IEEE80211_ASSOCIATE;
 991                 ieee80211_reschedule_timer(wpa_s,
 992                                            IEEE80211_RETRY_AUTH_INTERVAL);
 993         }
 994
 995         ieee80211_set_associated(wpa_s, 0);
 996 }
 997
 998
 999 static int ieee80211_ft_assoc_resp(struct wpa_supplicant *wpa_s,
1000                                    struct ieee802_11_elems *elems)
1001 {
1002 #ifdef CONFIG_IEEE80211R
1003         const u8 *mobility_domain = NULL;
1004         const u8 *r0kh_id = NULL;
1005         size_t r0kh_id_len = 0;
1006         const u8 *r1kh_id = NULL;
1007         struct rsn_ftie *hdr;
1008         const u8 *pos, *end;
1009
1010         if (elems->mdie && elems->mdie_len >= MOBILITY_DOMAIN_ID_LEN)
1011                 mobility_domain = elems->mdie;
1012         if (elems->ftie && elems->ftie_len >= sizeof(struct rsn_ftie)) {
1013                 end = elems->ftie + elems->ftie_len;
1014                 hdr = (struct rsn_ftie *) elems->ftie;
1015                 pos = (const u8 *) (hdr + 1);
1016                 while (pos + 1 < end) {
1017                         if (pos + 2 + pos[1] > end)
1018                                 break;
1019                         if (pos[0] == FTIE_SUBELEM_R1KH_ID &&
1020                             pos[1] == FT_R1KH_ID_LEN)
1021                                 r1kh_id = pos + 2;
1022                         else if (pos[0] == FTIE_SUBELEM_R0KH_ID &&
1023                                  pos[1] >= 1 && pos[1] <= FT_R0KH_ID_MAX_LEN) {
1024                                 r0kh_id = pos + 2;
1025                                 r0kh_id_len = pos[1];
1026                         }
1027                         pos += 2 + pos[1];
1028                 }
1029         }
1030         return wpa_sm_set_ft_params(wpa_s->wpa, mobility_domain, r0kh_id,
1031                                     r0kh_id_len, r1kh_id);
1032 #else /* CONFIG_IEEE80211R */
1033         return 0;
1034 #endif /* CONFIG_IEEE80211R */
1035 }
1036
1037
1038 static void ieee80211_build_tspec(struct wpabuf *buf)
1039 {
1040         struct wmm_tspec_element *tspec;
1041         int tid, up;
1042
1043         tspec = wpabuf_put(buf, sizeof(*tspec));
1044         tspec->eid = WLAN_EID_VENDOR_SPECIFIC;
1045         tspec->length = sizeof(*tspec) - 2;
1046         tspec->oui[0] = 0x00;
1047         tspec->oui[1] = 0x50;
1048         tspec->oui[2] = 0xf2;
1049         tspec->oui_type = 2;
1050         tspec->oui_subtype = 2;
1051         tspec->version = 1;
1052
1053         tid = 1;
1054         up = 6; /* Voice */
1055         tspec->ts_info[0] = (tid << 1) |
1056                 (WMM_TSPEC_DIRECTION_BI_DIRECTIONAL << 5) |
1057                 BIT(7);
1058         tspec->ts_info[1] = up << 3;
1059         tspec->nominal_msdu_size = host_to_le16(1530);
1060         tspec->mean_data_rate = host_to_le32(128000); /* bits per second */
1061         tspec->minimum_phy_rate = host_to_le32(6000000);
1062         tspec->surplus_bandwidth_allowance = host_to_le16(0x3000); /* 150% */
1063 }
1064
1065
1066 static void ieee80211_tx_addts(struct wpa_supplicant *wpa_s)
1067 {
1068         struct wpabuf *buf;
1069         struct ieee80211_mgmt *mgmt;
1070         size_t alen;
1071
1072         wpa_printf(MSG_DEBUG, "MLME: Send ADDTS Request for Voice TSPEC");
1073         mgmt = NULL;
1074         alen = mgmt->u.action.u.wmm_action.variable - (u8 *) mgmt;
1075
1076         buf = wpabuf_alloc(alen + sizeof(struct wmm_tspec_element));
1077         if (buf == NULL)
1078                 return;
1079
1080         mgmt = wpabuf_put(buf, alen);
1081         os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
1082         os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
1083         os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
1084         mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
1085                                            WLAN_FC_STYPE_ACTION);
1086         mgmt->u.action.category = WLAN_ACTION_WMM;
1087         mgmt->u.action.u.wmm_action.action_code = WMM_ACTION_CODE_ADDTS_REQ;
1088         mgmt->u.action.u.wmm_action.dialog_token = 1;
1089         mgmt->u.action.u.wmm_action.status_code = 0;
1090
1091         ieee80211_build_tspec(buf);
1092
1093         ieee80211_sta_tx(wpa_s, wpabuf_head(buf), wpabuf_len(buf));
1094         wpabuf_free(buf);
1095 }
1096
1097
1098 static void ieee80211_rx_mgmt_assoc_resp(struct wpa_supplicant *wpa_s,
1099                                          struct ieee80211_mgmt *mgmt,
1100                                          size_t len,
1101                                          struct ieee80211_rx_status *rx_status,
1102                                          int reassoc)
1103 {
1104         u8 rates[32];
1105         size_t rates_len;
1106         u16 capab_info, status_code, aid;
1107         struct ieee802_11_elems elems;
1108         u8 *pos;
1109
1110         /* AssocResp and ReassocResp have identical structure, so process both
1111          * of them in this function. */
1112
1113         if (wpa_s->mlme.state != IEEE80211_ASSOCIATE) {
1114                 wpa_printf(MSG_DEBUG, "MLME: association frame received from "
1115                            MACSTR ", but not in associate state - ignored",
1116                            MAC2STR(mgmt->sa));
1117                 return;
1118         }
1119
1120         if (len < 24 + 6) {
1121                 wpa_printf(MSG_DEBUG, "MLME: too short (%lu) association "
1122                            "frame received from " MACSTR " - ignored",
1123                            (unsigned long) len, MAC2STR(mgmt->sa));
1124                 return;
1125         }
1126
1127         if (os_memcmp(wpa_s->bssid, mgmt->sa, ETH_ALEN) != 0) {
1128                 wpa_printf(MSG_DEBUG, "MLME: association frame received from "
1129                            "unknown AP (SA=" MACSTR " BSSID=" MACSTR ") - "
1130                            "ignored", MAC2STR(mgmt->sa), MAC2STR(mgmt->bssid));
1131                 return;
1132         }
1133
1134         capab_info = le_to_host16(mgmt->u.assoc_resp.capab_info);
1135         status_code = le_to_host16(mgmt->u.assoc_resp.status_code);
1136         aid = le_to_host16(mgmt->u.assoc_resp.aid);
1137         if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
1138                 wpa_printf(MSG_DEBUG, "MLME: invalid aid value %d; bits 15:14 "
1139                            "not set", aid);
1140         aid &= ~(BIT(15) | BIT(14));
1141
1142         wpa_printf(MSG_DEBUG, "MLME: RX %sssocResp from " MACSTR
1143                    " (capab=0x%x status=%d aid=%d)",
1144                    reassoc ? "Rea" : "A", MAC2STR(mgmt->sa),
1145                    capab_info, status_code, aid);
1146
1147         pos = mgmt->u.assoc_resp.variable;
1148         if (ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), &elems, 0)
1149             == ParseFailed) {
1150                 wpa_printf(MSG_DEBUG, "MLME: failed to parse AssocResp");
1151                 return;
1152         }
1153
1154         if (status_code != WLAN_STATUS_SUCCESS) {
1155                 wpa_printf(MSG_DEBUG, "MLME: AP denied association (code=%d)",
1156                            status_code);
1157 #ifdef CONFIG_IEEE80211W
1158                 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
1159                     elems.timeout_int && elems.timeout_int_len == 5 &&
1160                     elems.timeout_int[0] == WLAN_TIMEOUT_ASSOC_COMEBACK) {
1161                         u32 tu, ms;
1162                         tu = WPA_GET_LE32(elems.timeout_int + 1);
1163                         ms = tu * 1024 / 1000;
1164                         wpa_printf(MSG_DEBUG, "MLME: AP rejected association "
1165                                    "temporarily; comeback duration %u TU "
1166                                    "(%u ms)", tu, ms);
1167                         if (ms > IEEE80211_ASSOC_TIMEOUT) {
1168                                 wpa_printf(MSG_DEBUG, "MLME: Update timer "
1169                                            "based on comeback duration");
1170                                 ieee80211_reschedule_timer(wpa_s, ms);
1171                         }
1172                 }
1173 #endif /* CONFIG_IEEE80211W */
1174                 return;
1175         }
1176
1177         if (elems.supp_rates == NULL) {
1178                 wpa_printf(MSG_DEBUG, "MLME: no SuppRates element in "
1179                            "AssocResp");
1180                 return;
1181         }
1182
1183         if (wpa_s->mlme.auth_alg == WLAN_AUTH_FT) {
1184                 if (!reassoc) {
1185                         wpa_printf(MSG_DEBUG, "MLME: AP tried to use "
1186                                    "association, not reassociation, response "
1187                                    "with FT");
1188                         return;
1189                 }
1190                 if (wpa_ft_validate_reassoc_resp(
1191                             wpa_s->wpa, pos, len - (pos - (u8 *) mgmt),
1192                             mgmt->sa) < 0) {
1193                         wpa_printf(MSG_DEBUG, "MLME: FT validation of Reassoc"
1194                                    "Resp failed");
1195                         return;
1196                 }
1197         } else if (ieee80211_ft_assoc_resp(wpa_s, &elems) < 0)
1198                 return;
1199
1200         wpa_printf(MSG_DEBUG, "MLME: associated");
1201         wpa_s->mlme.aid = aid;
1202         wpa_s->mlme.ap_capab = capab_info;
1203
1204         os_free(wpa_s->mlme.assocresp_ies);
1205         wpa_s->mlme.assocresp_ies_len = len - (pos - (u8 *) mgmt);
1206         wpa_s->mlme.assocresp_ies = os_malloc(wpa_s->mlme.assocresp_ies_len);
1207         if (wpa_s->mlme.assocresp_ies) {
1208                 os_memcpy(wpa_s->mlme.assocresp_ies, pos,
1209                           wpa_s->mlme.assocresp_ies_len);
1210         }
1211
1212         ieee80211_set_associated(wpa_s, 1);
1213
1214         rates_len = elems.supp_rates_len;
1215         if (rates_len > sizeof(rates))
1216                 rates_len = sizeof(rates);
1217         os_memcpy(rates, elems.supp_rates, rates_len);
1218         if (elems.ext_supp_rates) {
1219                 size_t _len = elems.ext_supp_rates_len;
1220                 if (_len > sizeof(rates) - rates_len)
1221                         _len = sizeof(rates) - rates_len;
1222                 os_memcpy(rates + rates_len, elems.ext_supp_rates, _len);
1223                 rates_len += _len;
1224         }
1225
1226         if (wpa_drv_set_bssid(wpa_s, wpa_s->bssid) < 0) {
1227                 wpa_printf(MSG_DEBUG, "MLME: failed to set BSSID for the "
1228                            "netstack");
1229         }
1230         if (wpa_drv_set_ssid(wpa_s, wpa_s->mlme.ssid, wpa_s->mlme.ssid_len) <
1231             0) {
1232                 wpa_printf(MSG_DEBUG, "MLME: failed to set SSID for the "
1233                            "netstack");
1234         }
1235
1236         /* Remove STA entry before adding a new one just in case to avoid
1237          * problems with existing configuration (e.g., keys). */
1238         wpa_drv_mlme_remove_sta(wpa_s, wpa_s->bssid);
1239         if (wpa_drv_mlme_add_sta(wpa_s, wpa_s->bssid, rates, rates_len) < 0) {
1240                 wpa_printf(MSG_DEBUG, "MLME: failed to add STA entry to the "
1241                            "netstack");
1242         }
1243
1244         if (elems.wmm && wpa_s->mlme.wmm_enabled)
1245                 ieee80211_sta_wmm_params(wpa_s, elems.wmm, elems.wmm_len);
1246
1247         ieee80211_associated(wpa_s);
1248
1249         if (wpa_s->mlme.auth_alg != WLAN_AUTH_FT &&
1250             os_strcmp(wpa_s->driver->name, "test") == 0 &&
1251             elems.wmm && wpa_s->mlme.wmm_enabled) {
1252                 /* Test WMM-AC - send ADDTS for WMM TSPEC */
1253                 ieee80211_tx_addts(wpa_s);
1254         }
1255 }
1256
1257
1258 /* Caller must hold local->sta_bss_lock */
1259 static void __ieee80211_bss_hash_add(struct wpa_supplicant *wpa_s,
1260                                      struct ieee80211_sta_bss *bss)
1261 {
1262         bss->hnext = wpa_s->mlme.sta_bss_hash[STA_HASH(bss->bssid)];
1263         wpa_s->mlme.sta_bss_hash[STA_HASH(bss->bssid)] = bss;
1264 }
1265
1266
1267 /* Caller must hold local->sta_bss_lock */
1268 static void __ieee80211_bss_hash_del(struct wpa_supplicant *wpa_s,
1269                                      struct ieee80211_sta_bss *bss)
1270 {
1271         struct ieee80211_sta_bss *b, *prev = NULL;
1272         b = wpa_s->mlme.sta_bss_hash[STA_HASH(bss->bssid)];
1273         while (b) {
1274                 if (b == bss) {
1275                         if (prev == NULL) {
1276                                 wpa_s->mlme.sta_bss_hash[STA_HASH(bss->bssid)]
1277                                         = bss->hnext;
1278                         } else {
1279                                 prev->hnext = bss->hnext;
1280                         }
1281                         break;
1282                 }
1283                 prev = b;
1284                 b = b->hnext;
1285         }
1286 }
1287
1288
1289 static struct ieee80211_sta_bss *
1290 ieee80211_bss_add(struct wpa_supplicant *wpa_s, const u8 *bssid)
1291 {
1292         struct ieee80211_sta_bss *bss;
1293
1294         bss = os_zalloc(sizeof(*bss));
1295         if (bss == NULL)
1296                 return NULL;
1297         os_memcpy(bss->bssid, bssid, ETH_ALEN);
1298
1299         /* TODO: order by RSSI? */
1300         bss->next = wpa_s->mlme.sta_bss_list;
1301         wpa_s->mlme.sta_bss_list = bss;
1302         __ieee80211_bss_hash_add(wpa_s, bss);
1303         return bss;
1304 }
1305
1306
1307 static struct ieee80211_sta_bss *
1308 ieee80211_bss_get(struct wpa_supplicant *wpa_s, const u8 *bssid)
1309 {
1310         struct ieee80211_sta_bss *bss;
1311
1312         bss = wpa_s->mlme.sta_bss_hash[STA_HASH(bssid)];
1313         while (bss) {
1314                 if (os_memcmp(bss->bssid, bssid, ETH_ALEN) == 0)
1315                         break;
1316                 bss = bss->hnext;
1317         }
1318         return bss;
1319 }
1320
1321
1322 static void ieee80211_bss_free(struct wpa_supplicant *wpa_s,
1323                                struct ieee80211_sta_bss *bss)
1324 {
1325         __ieee80211_bss_hash_del(wpa_s, bss);
1326         os_free(bss->ie);
1327         os_free(bss->wpa_ie);
1328         os_free(bss->rsn_ie);
1329         os_free(bss->wmm_ie);
1330         os_free(bss->mdie);
1331         os_free(bss);
1332 }
1333
1334
1335 static void ieee80211_bss_list_deinit(struct wpa_supplicant *wpa_s)
1336 {
1337         struct ieee80211_sta_bss *bss, *prev;
1338
1339         bss = wpa_s->mlme.sta_bss_list;
1340         wpa_s->mlme.sta_bss_list = NULL;
1341         while (bss) {
1342                 prev = bss;
1343                 bss = bss->next;
1344                 ieee80211_bss_free(wpa_s, prev);
1345         }
1346 }
1347
1348
1349 static void ieee80211_bss_info(struct wpa_supplicant *wpa_s,
1350                                struct ieee80211_mgmt *mgmt,
1351                                size_t len,
1352                                struct ieee80211_rx_status *rx_status,
1353                                int beacon)
1354 {
1355         struct ieee802_11_elems elems;
1356         size_t baselen;
1357         int channel, invalid = 0, clen;
1358         struct ieee80211_sta_bss *bss;
1359         u64 timestamp;
1360         u8 *pos, *ie_pos;
1361         size_t ie_len;
1362
1363         if (!beacon && os_memcmp(mgmt->da, wpa_s->own_addr, ETH_ALEN))
1364                 return; /* ignore ProbeResp to foreign address */
1365
1366 #if 0
1367         wpa_printf(MSG_MSGDUMP, "MLME: RX %s from " MACSTR " to " MACSTR,
1368                    beacon ? "Beacon" : "Probe Response",
1369                    MAC2STR(mgmt->sa), MAC2STR(mgmt->da));
1370 #endif
1371
1372         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1373         if (baselen > len)
1374                 return;
1375
1376         pos = mgmt->u.beacon.timestamp;
1377         timestamp = WPA_GET_LE64(pos);
1378
1379 #if 0 /* FIX */
1380         if (local->conf.mode == IW_MODE_ADHOC && beacon &&
1381             os_memcmp(mgmt->bssid, local->bssid, ETH_ALEN) == 0) {
1382 #ifdef IEEE80211_IBSS_DEBUG
1383                 static unsigned long last_tsf_debug = 0;
1384                 u64 tsf;
1385                 if (local->hw->get_tsf)
1386                         tsf = local->hw->get_tsf(local->mdev);
1387                 else
1388                         tsf = -1LLU;
1389                 if (time_after(jiffies, last_tsf_debug + 5 * HZ)) {
1390                         wpa_printf(MSG_DEBUG, "RX beacon SA=" MACSTR " BSSID="
1391                                    MACSTR " TSF=0x%llx BCN=0x%llx diff=%lld "
1392                                    "@%ld",
1393                                    MAC2STR(mgmt->sa), MAC2STR(mgmt->bssid),
1394                                    tsf, timestamp, tsf - timestamp, jiffies);
1395                         last_tsf_debug = jiffies;
1396                 }
1397 #endif /* IEEE80211_IBSS_DEBUG */
1398         }
1399 #endif
1400
1401         ie_pos = mgmt->u.beacon.variable;
1402         ie_len = len - baselen;
1403         if (ieee802_11_parse_elems(ie_pos, ie_len, &elems, 0) == ParseFailed)
1404                 invalid = 1;
1405
1406 #if 0 /* FIX */
1407         if (local->conf.mode == IW_MODE_ADHOC && elems.supp_rates &&
1408             os_memcmp(mgmt->bssid, local->bssid, ETH_ALEN) == 0 &&
1409             (sta = sta_info_get(local, mgmt->sa))) {
1410                 struct ieee80211_rate *rates;
1411                 size_t num_rates;
1412                 u32 supp_rates, prev_rates;
1413                 int i, j, oper_mode;
1414
1415                 rates = local->curr_rates;
1416                 num_rates = local->num_curr_rates;
1417                 oper_mode = wpa_s->mlme.sta_scanning ?
1418                         local->scan_oper_phymode : local->conf.phymode;
1419                 for (i = 0; i < local->hw->num_modes; i++) {
1420                         struct ieee80211_hw_modes *mode = &local->hw->modes[i];
1421                         if (oper_mode == mode->mode) {
1422                                 rates = mode->rates;
1423                                 num_rates = mode->num_rates;
1424                                 break;
1425                         }
1426                 }
1427
1428                 supp_rates = 0;
1429                 for (i = 0; i < elems.supp_rates_len +
1430                              elems.ext_supp_rates_len; i++) {
1431                         u8 rate = 0;
1432                         int own_rate;
1433                         if (i < elems.supp_rates_len)
1434                                 rate = elems.supp_rates[i];
1435                         else if (elems.ext_supp_rates)
1436                                 rate = elems.ext_supp_rates
1437                                         [i - elems.supp_rates_len];
1438                         own_rate = 5 * (rate & 0x7f);
1439                         if (oper_mode == MODE_ATHEROS_TURBO)
1440                                 own_rate *= 2;
1441                         for (j = 0; j < num_rates; j++)
1442                                 if (rates[j].rate == own_rate)
1443                                         supp_rates |= BIT(j);
1444                 }
1445
1446                 prev_rates = sta->supp_rates;
1447                 sta->supp_rates &= supp_rates;
1448                 if (sta->supp_rates == 0) {
1449                         /* No matching rates - this should not really happen.
1450                          * Make sure that at least one rate is marked
1451                          * supported to avoid issues with TX rate ctrl. */
1452                         sta->supp_rates = wpa_s->mlme.supp_rates_bits;
1453                 }
1454                 if (sta->supp_rates != prev_rates) {
1455                         wpa_printf(MSG_DEBUG, "MLME: updated supp_rates set "
1456                                    "for " MACSTR " based on beacon info "
1457                                    "(0x%x & 0x%x -> 0x%x)",
1458                                    MAC2STR(sta->addr), prev_rates,
1459                                    supp_rates, sta->supp_rates);
1460                 }
1461                 sta_info_release(local, sta);
1462         }
1463 #endif
1464
1465         if (elems.ssid == NULL)
1466                 return;
1467
1468         if (elems.ds_params && elems.ds_params_len == 1)
1469                 channel = elems.ds_params[0];
1470         else
1471                 channel = rx_status->channel;
1472
1473         bss = ieee80211_bss_get(wpa_s, mgmt->bssid);
1474         if (bss == NULL) {
1475                 bss = ieee80211_bss_add(wpa_s, mgmt->bssid);
1476                 if (bss == NULL)
1477                         return;
1478         } else {
1479 #if 0
1480                 /* TODO: order by RSSI? */
1481                 spin_lock_bh(&local->sta_bss_lock);
1482                 list_move_tail(&bss->list, &local->sta_bss_list);
1483                 spin_unlock_bh(&local->sta_bss_lock);
1484 #endif
1485         }
1486
1487         if (bss->probe_resp && beacon) {
1488                 /* Do not allow beacon to override data from Probe Response. */
1489                 return;
1490         }
1491
1492         bss->beacon_int = le_to_host16(mgmt->u.beacon.beacon_int);
1493         bss->capability = le_to_host16(mgmt->u.beacon.capab_info);
1494
1495         if (bss->ie == NULL || bss->ie_len < ie_len) {
1496                 os_free(bss->ie);
1497                 bss->ie = os_malloc(ie_len);
1498         }
1499         if (bss->ie) {
1500                 os_memcpy(bss->ie, ie_pos, ie_len);
1501                 bss->ie_len = ie_len;
1502         }
1503
1504         if (elems.ssid && elems.ssid_len <= MAX_SSID_LEN) {
1505                 os_memcpy(bss->ssid, elems.ssid, elems.ssid_len);
1506                 bss->ssid_len = elems.ssid_len;
1507         }
1508
1509         bss->supp_rates_len = 0;
1510         if (elems.supp_rates) {
1511                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1512                 if (clen > elems.supp_rates_len)
1513                         clen = elems.supp_rates_len;
1514                 os_memcpy(&bss->supp_rates[bss->supp_rates_len],
1515                           elems.supp_rates, clen);
1516                 bss->supp_rates_len += clen;
1517         }
1518         if (elems.ext_supp_rates) {
1519                 clen = IEEE80211_MAX_SUPP_RATES - bss->supp_rates_len;
1520                 if (clen > elems.ext_supp_rates_len)
1521                         clen = elems.ext_supp_rates_len;
1522                 os_memcpy(&bss->supp_rates[bss->supp_rates_len],
1523                           elems.ext_supp_rates, clen);
1524                 bss->supp_rates_len += clen;
1525         }
1526
1527         if (elems.wpa_ie &&
1528             (bss->wpa_ie == NULL || bss->wpa_ie_len != elems.wpa_ie_len ||
1529              os_memcmp(bss->wpa_ie, elems.wpa_ie, elems.wpa_ie_len))) {
1530                 os_free(bss->wpa_ie);
1531                 bss->wpa_ie = os_malloc(elems.wpa_ie_len + 2);
1532                 if (bss->wpa_ie) {
1533                         os_memcpy(bss->wpa_ie, elems.wpa_ie - 2,
1534                                   elems.wpa_ie_len + 2);
1535                         bss->wpa_ie_len = elems.wpa_ie_len + 2;
1536                 } else
1537                         bss->wpa_ie_len = 0;
1538         } else if (!elems.wpa_ie && bss->wpa_ie) {
1539                 os_free(bss->wpa_ie);
1540                 bss->wpa_ie = NULL;
1541                 bss->wpa_ie_len = 0;
1542         }
1543
1544         if (elems.rsn_ie &&
1545             (bss->rsn_ie == NULL || bss->rsn_ie_len != elems.rsn_ie_len ||
1546              os_memcmp(bss->rsn_ie, elems.rsn_ie, elems.rsn_ie_len))) {
1547                 os_free(bss->rsn_ie);
1548                 bss->rsn_ie = os_malloc(elems.rsn_ie_len + 2);
1549                 if (bss->rsn_ie) {
1550                         os_memcpy(bss->rsn_ie, elems.rsn_ie - 2,
1551                                   elems.rsn_ie_len + 2);
1552                         bss->rsn_ie_len = elems.rsn_ie_len + 2;
1553                 } else
1554                         bss->rsn_ie_len = 0;
1555         } else if (!elems.rsn_ie && bss->rsn_ie) {
1556                 os_free(bss->rsn_ie);
1557                 bss->rsn_ie = NULL;
1558                 bss->rsn_ie_len = 0;
1559         }
1560
1561         if (elems.wmm &&
1562             (bss->wmm_ie == NULL || bss->wmm_ie_len != elems.wmm_len ||
1563              os_memcmp(bss->wmm_ie, elems.wmm, elems.wmm_len))) {
1564                 os_free(bss->wmm_ie);
1565                 bss->wmm_ie = os_malloc(elems.wmm_len + 2);
1566                 if (bss->wmm_ie) {
1567                         os_memcpy(bss->wmm_ie, elems.wmm - 2,
1568                                   elems.wmm_len + 2);
1569                         bss->wmm_ie_len = elems.wmm_len + 2;
1570                 } else
1571                         bss->wmm_ie_len = 0;
1572         } else if (!elems.wmm && bss->wmm_ie) {
1573                 os_free(bss->wmm_ie);
1574                 bss->wmm_ie = NULL;
1575                 bss->wmm_ie_len = 0;
1576         }
1577
1578 #ifdef CONFIG_IEEE80211R
1579         if (elems.mdie &&
1580             (bss->mdie == NULL || bss->mdie_len != elems.mdie_len ||
1581              os_memcmp(bss->mdie, elems.mdie, elems.mdie_len))) {
1582                 os_free(bss->mdie);
1583                 bss->mdie = os_malloc(elems.mdie_len + 2);
1584                 if (bss->mdie) {
1585                         os_memcpy(bss->mdie, elems.mdie - 2,
1586                                   elems.mdie_len + 2);
1587                         bss->mdie_len = elems.mdie_len + 2;
1588                 } else
1589                         bss->mdie_len = 0;
1590         } else if (!elems.mdie && bss->mdie) {
1591                 os_free(bss->mdie);
1592                 bss->mdie = NULL;
1593                 bss->mdie_len = 0;
1594         }
1595 #endif /* CONFIG_IEEE80211R */
1596
1597         bss->hw_mode = wpa_s->mlme.phymode;
1598         bss->channel = channel;
1599         bss->freq = wpa_s->mlme.freq;
1600         if (channel != wpa_s->mlme.channel &&
1601             (wpa_s->mlme.phymode == HOSTAPD_MODE_IEEE80211G ||
1602              wpa_s->mlme.phymode == HOSTAPD_MODE_IEEE80211B) &&
1603             channel >= 1 && channel <= 14) {
1604                 static const int freq_list[] = {
1605                         2412, 2417, 2422, 2427, 2432, 2437, 2442,
1606                         2447, 2452, 2457, 2462, 2467, 2472, 2484
1607                 };
1608                 /* IEEE 802.11g/b mode can receive packets from neighboring
1609                  * channels, so map the channel into frequency. */
1610                 bss->freq = freq_list[channel - 1];
1611         }
1612         bss->timestamp = timestamp;
1613         os_get_time(&bss->last_update);
1614         bss->rssi = rx_status->ssi;
1615         if (!beacon)
1616                 bss->probe_resp++;
1617 }
1618
1619
1620 static void ieee80211_rx_mgmt_probe_resp(struct wpa_supplicant *wpa_s,
1621                                          struct ieee80211_mgmt *mgmt,
1622                                          size_t len,
1623                                          struct ieee80211_rx_status *rx_status)
1624 {
1625         ieee80211_bss_info(wpa_s, mgmt, len, rx_status, 0);
1626 }
1627
1628
1629 static void ieee80211_rx_mgmt_beacon(struct wpa_supplicant *wpa_s,
1630                                      struct ieee80211_mgmt *mgmt,
1631                                      size_t len,
1632                                      struct ieee80211_rx_status *rx_status)
1633 {
1634         int use_protection;
1635         size_t baselen;
1636         struct ieee802_11_elems elems;
1637
1638         ieee80211_bss_info(wpa_s, mgmt, len, rx_status, 1);
1639
1640         if (!wpa_s->mlme.associated ||
1641             os_memcmp(wpa_s->bssid, mgmt->bssid, ETH_ALEN) != 0)
1642                 return;
1643
1644         /* Process beacon from the current BSS */
1645         baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
1646         if (baselen > len)
1647                 return;
1648
1649         if (ieee802_11_parse_elems(mgmt->u.beacon.variable, len - baselen,
1650                                    &elems, 0) == ParseFailed)
1651                 return;
1652
1653         use_protection = 0;
1654         if (elems.erp_info && elems.erp_info_len >= 1) {
1655                 use_protection =
1656                         (elems.erp_info[0] & ERP_INFO_USE_PROTECTION) != 0;
1657         }
1658
1659         if (use_protection != !!wpa_s->mlme.use_protection) {
1660                 wpa_printf(MSG_DEBUG, "MLME: CTS protection %s (BSSID=" MACSTR
1661                            ")",
1662                            use_protection ? "enabled" : "disabled",
1663                            MAC2STR(wpa_s->bssid));
1664                 wpa_s->mlme.use_protection = use_protection ? 1 : 0;
1665                 wpa_s->mlme.cts_protect_erp_frames = use_protection;
1666         }
1667
1668         if (elems.wmm && wpa_s->mlme.wmm_enabled) {
1669                 ieee80211_sta_wmm_params(wpa_s, elems.wmm,
1670                                          elems.wmm_len);
1671         }
1672 }
1673
1674
1675 static void ieee80211_rx_mgmt_probe_req(struct wpa_supplicant *wpa_s,
1676                                         struct ieee80211_mgmt *mgmt,
1677                                         size_t len,
1678                                         struct ieee80211_rx_status *rx_status)
1679 {
1680         int tx_last_beacon, adhoc;
1681 #if 0 /* FIX */
1682         struct ieee80211_mgmt *resp;
1683 #endif
1684         u8 *pos, *end;
1685         struct wpa_ssid *ssid = wpa_s->current_ssid;
1686
1687         adhoc = ssid && ssid->mode == WPAS_MODE_IBSS;
1688
1689         if (!adhoc || wpa_s->mlme.state != IEEE80211_IBSS_JOINED ||
1690             len < 24 + 2 || wpa_s->mlme.probe_resp == NULL)
1691                 return;
1692
1693 #if 0 /* FIX */
1694         if (local->hw->tx_last_beacon)
1695                 tx_last_beacon = local->hw->tx_last_beacon(local->mdev);
1696         else
1697 #endif
1698                 tx_last_beacon = 1;
1699
1700 #ifdef IEEE80211_IBSS_DEBUG
1701         wpa_printf(MSG_DEBUG, "MLME: RX ProbeReq SA=" MACSTR " DA=" MACSTR
1702                    " BSSID=" MACSTR " (tx_last_beacon=%d)",
1703                    MAC2STR(mgmt->sa), MAC2STR(mgmt->da),
1704                    MAC2STR(mgmt->bssid), tx_last_beacon);
1705 #endif /* IEEE80211_IBSS_DEBUG */
1706
1707         if (!tx_last_beacon)
1708                 return;
1709
1710         if (os_memcmp(mgmt->bssid, wpa_s->bssid, ETH_ALEN) != 0 &&
1711             os_memcmp(mgmt->bssid, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1712                 return;
1713
1714         end = ((u8 *) mgmt) + len;
1715         pos = mgmt->u.probe_req.variable;
1716         if (pos[0] != WLAN_EID_SSID ||
1717             pos + 2 + pos[1] > end) {
1718                 wpa_printf(MSG_DEBUG, "MLME: Invalid SSID IE in ProbeReq from "
1719                            MACSTR, MAC2STR(mgmt->sa));
1720                 return;
1721         }
1722         if (pos[1] != 0 &&
1723             (pos[1] != wpa_s->mlme.ssid_len ||
1724              os_memcmp(pos + 2, wpa_s->mlme.ssid, wpa_s->mlme.ssid_len) != 0))
1725         {
1726                 /* Ignore ProbeReq for foreign SSID */
1727                 return;
1728         }
1729
1730 #if 0 /* FIX */
1731         /* Reply with ProbeResp */
1732         skb = skb_copy(wpa_s->mlme.probe_resp, GFP_ATOMIC);
1733         if (skb == NULL)
1734                 return;
1735
1736         resp = (struct ieee80211_mgmt *) skb->data;
1737         os_memcpy(resp->da, mgmt->sa, ETH_ALEN);
1738 #ifdef IEEE80211_IBSS_DEBUG
1739         wpa_printf(MSG_DEBUG, "MLME: Sending ProbeResp to " MACSTR,
1740                    MAC2STR(resp->da));
1741 #endif /* IEEE80211_IBSS_DEBUG */
1742         ieee80211_sta_tx(wpa_s, skb, 0, 1);
1743 #endif
1744 }
1745
1746
1747 #ifdef CONFIG_IEEE80211R
1748 static void ieee80211_rx_mgmt_ft_action(struct wpa_supplicant *wpa_s,
1749                                         struct ieee80211_mgmt *mgmt,
1750                                         size_t len,
1751                                         struct ieee80211_rx_status *rx_status)
1752 {
1753         union wpa_event_data data;
1754         u16 status;
1755         u8 *sta_addr, *target_ap_addr;
1756
1757         if (len < 24 + 1 + sizeof(mgmt->u.action.u.ft_action_resp)) {
1758                 wpa_printf(MSG_DEBUG, "MLME: Too short FT Action frame");
1759                 return;
1760         }
1761
1762         /*
1763          * Only FT Action Response is needed for now since reservation
1764          * protocol is not supported.
1765          */
1766         if (mgmt->u.action.u.ft_action_resp.action != 2) {
1767                 wpa_printf(MSG_DEBUG, "MLME: Unexpected FT Action %d",
1768                            mgmt->u.action.u.ft_action_resp.action);
1769                 return;
1770         }
1771
1772         status = le_to_host16(mgmt->u.action.u.ft_action_resp.status_code);
1773         sta_addr = mgmt->u.action.u.ft_action_resp.sta_addr;
1774         target_ap_addr = mgmt->u.action.u.ft_action_resp.target_ap_addr;
1775         wpa_printf(MSG_DEBUG, "MLME: Received FT Action Response: STA " MACSTR
1776                    " TargetAP " MACSTR " Status Code %d",
1777                    MAC2STR(sta_addr), MAC2STR(target_ap_addr), status);
1778         if (os_memcmp(sta_addr, wpa_s->own_addr, ETH_ALEN) != 0) {
1779                 wpa_printf(MSG_DEBUG, "MLME: Foreign STA Address " MACSTR
1780                            " in FT Action Response", MAC2STR(sta_addr));
1781                 return;
1782         }
1783
1784         if (status) {
1785                 wpa_printf(MSG_DEBUG, "MLME: FT Action Response indicates "
1786                            "failure (status code %d)", status);
1787                 /* TODO: report error to FT code(?) */
1788                 return;
1789         }
1790
1791         os_memset(&data, 0, sizeof(data));
1792         data.ft_ies.ies = mgmt->u.action.u.ft_action_resp.variable;
1793         data.ft_ies.ies_len = len - (mgmt->u.action.u.ft_action_resp.variable -
1794                                      (u8 *) mgmt);
1795         data.ft_ies.ft_action = 1;
1796         os_memcpy(data.ft_ies.target_ap, target_ap_addr, ETH_ALEN);
1797         wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &data);
1798         /* TODO: should only re-associate, if EVENT_FT_RESPONSE was processed
1799          * successfully */
1800         wpa_s->mlme.prev_bssid_set = 1;
1801         wpa_s->mlme.auth_alg = WLAN_AUTH_FT;
1802         os_memcpy(wpa_s->mlme.prev_bssid, wpa_s->bssid, ETH_ALEN);
1803         os_memcpy(wpa_s->bssid, target_ap_addr, ETH_ALEN);
1804         ieee80211_associate(wpa_s);
1805 }
1806 #endif /* CONFIG_IEEE80211R */
1807
1808
1809 #ifdef CONFIG_IEEE80211W
1810
1811 /* MLME-SAQuery.response */
1812 static int ieee80211_sta_send_sa_query_resp(struct wpa_supplicant *wpa_s,
1813                                             const u8 *addr, const u8 *trans_id)
1814 {
1815         struct ieee80211_mgmt *mgmt;
1816         int res;
1817         size_t len;
1818
1819         mgmt = os_zalloc(sizeof(*mgmt));
1820         if (mgmt == NULL) {
1821                 wpa_printf(MSG_DEBUG, "MLME: Failed to allocate buffer for "
1822                            "SA Query action frame");
1823                 return -1;
1824         }
1825
1826         len = 24;
1827         os_memcpy(mgmt->da, addr, ETH_ALEN);
1828         os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
1829         os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
1830         mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
1831                                            WLAN_FC_STYPE_ACTION);
1832         mgmt->u.action.category = WLAN_ACTION_SA_QUERY;
1833         mgmt->u.action.u.sa_query_resp.action = WLAN_SA_QUERY_RESPONSE;
1834         os_memcpy(mgmt->u.action.u.sa_query_resp.trans_id, trans_id,
1835                   WLAN_SA_QUERY_TR_ID_LEN);
1836         len += 1 + sizeof(mgmt->u.action.u.sa_query_resp);
1837
1838         res = ieee80211_sta_tx(wpa_s, (u8 *) mgmt, len);
1839         os_free(mgmt);
1840
1841         return res;
1842 }
1843
1844
1845 static void ieee80211_rx_mgmt_sa_query_action(
1846         struct wpa_supplicant *wpa_s, struct ieee80211_mgmt *mgmt, size_t len,
1847         struct ieee80211_rx_status *rx_status)
1848 {
1849         if (len < 24 + 1 + sizeof(mgmt->u.action.u.sa_query_req)) {
1850                 wpa_printf(MSG_DEBUG, "MLME: Too short SA Query Action frame");
1851                 return;
1852         }
1853
1854         if (mgmt->u.action.u.sa_query_req.action != WLAN_SA_QUERY_REQUEST) {
1855                 wpa_printf(MSG_DEBUG, "MLME: Unexpected SA Query Action %d",
1856                            mgmt->u.action.u.sa_query_req.action);
1857                 return;
1858         }
1859
1860         if (os_memcmp(mgmt->sa, wpa_s->bssid, ETH_ALEN) != 0) {
1861                 wpa_printf(MSG_DEBUG, "MLME: Ignore SA Query from unknown "
1862                            "source " MACSTR, MAC2STR(mgmt->sa));
1863                 return;
1864         }
1865
1866         if (wpa_s->mlme.state == IEEE80211_ASSOCIATE) {
1867                 wpa_printf(MSG_DEBUG, "MLME: Ignore SA query request during "
1868                            "association process");
1869                 return;
1870         }
1871
1872         wpa_printf(MSG_DEBUG, "MLME: Replying to SA Query request");
1873         ieee80211_sta_send_sa_query_resp(wpa_s, mgmt->sa, mgmt->u.action.u.
1874                                          sa_query_req.trans_id);
1875 }
1876
1877 #endif /* CONFIG_IEEE80211W */
1878
1879
1880 static void dump_tspec(struct wmm_tspec_element *tspec)
1881 {
1882         int up, psb, dir, tid;
1883         u16 val;
1884
1885         up = (tspec->ts_info[1] >> 3) & 0x07;
1886         psb = (tspec->ts_info[1] >> 2) & 0x01;
1887         dir = (tspec->ts_info[0] >> 5) & 0x03;
1888         tid = (tspec->ts_info[0] >> 1) & 0x0f;
1889         wpa_printf(MSG_DEBUG, "WMM: TS Info: UP=%d PSB=%d Direction=%d TID=%d",
1890                    up, psb, dir, tid);
1891         val = le_to_host16(tspec->nominal_msdu_size);
1892         wpa_printf(MSG_DEBUG, "WMM: Nominal MSDU Size: %d%s",
1893                    val & 0x7fff, val & 0x8000 ? " (fixed)" : "");
1894         wpa_printf(MSG_DEBUG, "WMM: Mean Data Rate: %u bps",
1895                    le_to_host32(tspec->mean_data_rate));
1896         wpa_printf(MSG_DEBUG, "WMM: Minimum PHY Rate: %u bps",
1897                    le_to_host32(tspec->minimum_phy_rate));
1898         val = le_to_host16(tspec->surplus_bandwidth_allowance);
1899         wpa_printf(MSG_DEBUG, "WMM: Surplus Bandwidth Allowance: %u.%04u",
1900                    val >> 13, 10000 * (val & 0x1fff) / 0x2000);
1901         val = le_to_host16(tspec->medium_time);
1902         wpa_printf(MSG_DEBUG, "WMM: Medium Time: %u (= %u usec/sec)",
1903                    val, 32 * val);
1904 }
1905
1906
1907 static int is_wmm_tspec(const u8 *ie, size_t len)
1908 {
1909         const struct wmm_tspec_element *tspec;
1910
1911         if (len < sizeof(*tspec))
1912                 return 0;
1913
1914         tspec = (const struct wmm_tspec_element *) ie;
1915         if (tspec->eid != WLAN_EID_VENDOR_SPECIFIC ||
1916             tspec->length < sizeof(*tspec) - 2 ||
1917             tspec->oui[0] != 0x00 || tspec->oui[1] != 0x50 ||
1918             tspec->oui[2] != 0xf2 || tspec->oui_type != 2 ||
1919             tspec->oui_subtype != 2 || tspec->version != 1)
1920                 return 0;
1921
1922         return 1;
1923 }
1924
1925
1926 static void ieee80211_rx_addts_resp(
1927         struct wpa_supplicant *wpa_s, struct ieee80211_mgmt *mgmt, size_t len,
1928         size_t var_len)
1929 {
1930         struct wmm_tspec_element *tspec;
1931
1932         wpa_printf(MSG_DEBUG, "WMM: Received ADDTS Response");
1933         wpa_hexdump(MSG_MSGDUMP, "WMM: ADDTS Response IE(s)",
1934                     mgmt->u.action.u.wmm_action.variable, var_len);
1935         if (!is_wmm_tspec(mgmt->u.action.u.wmm_action.variable, var_len))
1936                 return;
1937         tspec = (struct wmm_tspec_element *)
1938                 mgmt->u.action.u.wmm_action.variable;
1939         dump_tspec(tspec);
1940 }
1941
1942
1943 static void ieee80211_rx_delts(
1944         struct wpa_supplicant *wpa_s, struct ieee80211_mgmt *mgmt, size_t len,
1945         size_t var_len)
1946 {
1947         struct wmm_tspec_element *tspec;
1948
1949         wpa_printf(MSG_DEBUG, "WMM: Received DELTS");
1950         wpa_hexdump(MSG_MSGDUMP, "WMM: DELTS IE(s)",
1951                     mgmt->u.action.u.wmm_action.variable, var_len);
1952         if (!is_wmm_tspec(mgmt->u.action.u.wmm_action.variable, var_len))
1953                 return;
1954         tspec = (struct wmm_tspec_element *)
1955                 mgmt->u.action.u.wmm_action.variable;
1956         dump_tspec(tspec);
1957 }
1958
1959
1960 static void ieee80211_rx_mgmt_wmm_action(
1961         struct wpa_supplicant *wpa_s, struct ieee80211_mgmt *mgmt, size_t len,
1962         struct ieee80211_rx_status *rx_status)
1963 {
1964         size_t alen;
1965
1966         alen = mgmt->u.action.u.wmm_action.variable - (u8 *) mgmt;
1967         if (len < alen) {
1968                 wpa_printf(MSG_DEBUG, "WMM: Received Action frame too short");
1969                 return;
1970         }
1971
1972         wpa_printf(MSG_DEBUG, "WMM: Received Action frame: Action Code %d, "
1973                    "Dialog Token %d, Status Code %d",
1974                    mgmt->u.action.u.wmm_action.action_code,
1975                    mgmt->u.action.u.wmm_action.dialog_token,
1976                    mgmt->u.action.u.wmm_action.status_code);
1977
1978         switch (mgmt->u.action.u.wmm_action.action_code) {
1979         case WMM_ACTION_CODE_ADDTS_RESP:
1980                 ieee80211_rx_addts_resp(wpa_s, mgmt, len, len - alen);
1981                 break;
1982         case WMM_ACTION_CODE_DELTS:
1983                 ieee80211_rx_delts(wpa_s, mgmt, len, len - alen);
1984                 break;
1985         default:
1986                 wpa_printf(MSG_DEBUG, "WMM: Unsupported Action Code %d",
1987                            mgmt->u.action.u.wmm_action.action_code);
1988                 break;
1989         }
1990 }
1991
1992
1993 static void ieee80211_rx_mgmt_action(struct wpa_supplicant *wpa_s,
1994                                      struct ieee80211_mgmt *mgmt,
1995                                      size_t len,
1996                                      struct ieee80211_rx_status *rx_status)
1997 {
1998         wpa_printf(MSG_DEBUG, "MLME: received Action frame");
1999
2000         if (len < 25)
2001                 return;
2002
2003         switch (mgmt->u.action.category) {
2004 #ifdef CONFIG_IEEE80211R
2005         case WLAN_ACTION_FT:
2006                 ieee80211_rx_mgmt_ft_action(wpa_s, mgmt, len, rx_status);
2007                 break;
2008 #endif /* CONFIG_IEEE80211R */
2009 #ifdef CONFIG_IEEE80211W
2010         case WLAN_ACTION_SA_QUERY:
2011                 ieee80211_rx_mgmt_sa_query_action(wpa_s, mgmt, len, rx_status);
2012                 break;
2013 #endif /* CONFIG_IEEE80211W */
2014         case WLAN_ACTION_WMM:
2015                 ieee80211_rx_mgmt_wmm_action(wpa_s, mgmt, len, rx_status);
2016                 break;
2017         default:
2018                 wpa_printf(MSG_DEBUG, "MLME: unknown Action Category %d",
2019                            mgmt->u.action.category);
2020                 break;
2021         }
2022 }
2023
2024
2025 static void ieee80211_sta_rx_mgmt(struct wpa_supplicant *wpa_s,
2026                                   const u8 *buf, size_t len,
2027                                   struct ieee80211_rx_status *rx_status)
2028 {
2029         struct ieee80211_mgmt *mgmt;
2030         u16 fc;
2031
2032         if (len < 24)
2033                 return;
2034
2035         mgmt = (struct ieee80211_mgmt *) buf;
2036         fc = le_to_host16(mgmt->frame_control);
2037
2038         switch (WLAN_FC_GET_STYPE(fc)) {
2039         case WLAN_FC_STYPE_PROBE_REQ:
2040                 ieee80211_rx_mgmt_probe_req(wpa_s, mgmt, len, rx_status);
2041                 break;
2042         case WLAN_FC_STYPE_PROBE_RESP:
2043                 ieee80211_rx_mgmt_probe_resp(wpa_s, mgmt, len, rx_status);
2044                 break;
2045         case WLAN_FC_STYPE_BEACON:
2046                 ieee80211_rx_mgmt_beacon(wpa_s, mgmt, len, rx_status);
2047                 break;
2048         case WLAN_FC_STYPE_AUTH:
2049                 ieee80211_rx_mgmt_auth(wpa_s, mgmt, len, rx_status);
2050                 break;
2051         case WLAN_FC_STYPE_ASSOC_RESP:
2052                 ieee80211_rx_mgmt_assoc_resp(wpa_s, mgmt, len, rx_status, 0);
2053                 break;
2054         case WLAN_FC_STYPE_REASSOC_RESP:
2055                 ieee80211_rx_mgmt_assoc_resp(wpa_s, mgmt, len, rx_status, 1);
2056                 break;
2057         case WLAN_FC_STYPE_DEAUTH:
2058                 ieee80211_rx_mgmt_deauth(wpa_s, mgmt, len, rx_status);
2059                 break;
2060         case WLAN_FC_STYPE_DISASSOC:
2061                 ieee80211_rx_mgmt_disassoc(wpa_s, mgmt, len, rx_status);
2062                 break;
2063         case WLAN_FC_STYPE_ACTION:
2064                 ieee80211_rx_mgmt_action(wpa_s, mgmt, len, rx_status);
2065                 break;
2066         default:
2067                 wpa_printf(MSG_DEBUG, "MLME: received unknown management "
2068                            "frame - stype=%d", WLAN_FC_GET_STYPE(fc));
2069                 break;
2070         }
2071 }
2072
2073
2074 static void ieee80211_sta_rx_scan(struct wpa_supplicant *wpa_s,
2075                                   const u8 *buf, size_t len,
2076                                   struct ieee80211_rx_status *rx_status)
2077 {
2078         struct ieee80211_mgmt *mgmt;
2079         u16 fc;
2080
2081         if (len < 24)
2082                 return;
2083
2084         mgmt = (struct ieee80211_mgmt *) buf;
2085         fc = le_to_host16(mgmt->frame_control);
2086
2087         if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT) {
2088                 if (WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_PROBE_RESP) {
2089                         ieee80211_rx_mgmt_probe_resp(wpa_s, mgmt,
2090                                                      len, rx_status);
2091                 } else if (WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_BEACON) {
2092                         ieee80211_rx_mgmt_beacon(wpa_s, mgmt, len, rx_status);
2093                 }
2094         }
2095 }
2096
2097
2098 static int ieee80211_sta_active_ibss(struct wpa_supplicant *wpa_s)
2099 {
2100         int active = 0;
2101
2102 #if 0 /* FIX */
2103         list_for_each(ptr, &local->sta_list) {
2104                 sta = list_entry(ptr, struct sta_info, list);
2105                 if (sta->dev == dev &&
2106                     time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL,
2107                                jiffies)) {
2108                         active++;
2109                         break;
2110                 }
2111         }
2112 #endif
2113
2114         return active;
2115 }
2116
2117
2118 static void ieee80211_sta_expire(struct wpa_supplicant *wpa_s)
2119 {
2120 #if 0 /* FIX */
2121         list_for_each_safe(ptr, n, &local->sta_list) {
2122                 sta = list_entry(ptr, struct sta_info, list);
2123                 if (time_after(jiffies, sta->last_rx +
2124                                IEEE80211_IBSS_INACTIVITY_LIMIT)) {
2125                         wpa_printf(MSG_DEBUG, "MLME: expiring inactive STA "
2126                                    MACSTR, MAC2STR(sta->addr));
2127                         sta_info_free(local, sta, 1);
2128                 }
2129         }
2130 #endif
2131 }
2132
2133
2134 static void ieee80211_sta_merge_ibss(struct wpa_supplicant *wpa_s)
2135 {
2136         struct wpa_driver_scan_params params;
2137
2138         ieee80211_reschedule_timer(wpa_s, IEEE80211_IBSS_MERGE_INTERVAL);
2139
2140         ieee80211_sta_expire(wpa_s);
2141         if (ieee80211_sta_active_ibss(wpa_s))
2142                 return;
2143
2144         wpa_printf(MSG_DEBUG, "MLME: No active IBSS STAs - trying to scan for "
2145                    "other IBSS networks with same SSID (merge)");
2146         os_memset(&params, 0, sizeof(params));
2147         params.ssids[0].ssid = wpa_s->mlme.ssid;
2148         params.ssids[0].ssid_len = wpa_s->mlme.ssid_len;
2149         params.num_ssids = wpa_s->mlme.ssid_len ? 1 : 0;
2150         ieee80211_sta_req_scan(wpa_s, &params);
2151 }
2152
2153
2154 static void ieee80211_sta_timer(void *eloop_ctx, void *timeout_ctx)
2155 {
2156         struct wpa_supplicant *wpa_s = eloop_ctx;
2157
2158         switch (wpa_s->mlme.state) {
2159         case IEEE80211_DISABLED:
2160                 break;
2161         case IEEE80211_AUTHENTICATE:
2162                 ieee80211_authenticate(wpa_s);
2163                 break;
2164         case IEEE80211_ASSOCIATE:
2165                 ieee80211_associate(wpa_s);
2166                 break;
2167         case IEEE80211_ASSOCIATED:
2168                 ieee80211_associated(wpa_s);
2169                 break;
2170         case IEEE80211_IBSS_SEARCH:
2171                 ieee80211_sta_find_ibss(wpa_s);
2172                 break;
2173         case IEEE80211_IBSS_JOINED:
2174                 ieee80211_sta_merge_ibss(wpa_s);
2175                 break;
2176         default:
2177                 wpa_printf(MSG_DEBUG, "ieee80211_sta_timer: Unknown state %d",
2178                            wpa_s->mlme.state);
2179                 break;
2180         }
2181
2182         if (ieee80211_privacy_mismatch(wpa_s)) {
2183                 wpa_printf(MSG_DEBUG, "MLME: privacy configuration mismatch "
2184                            "and mixed-cell disabled - disassociate");
2185
2186                 ieee80211_send_disassoc(wpa_s, WLAN_REASON_UNSPECIFIED);
2187                 ieee80211_set_associated(wpa_s, 0);
2188         }
2189 }
2190
2191
2192 static void ieee80211_sta_new_auth(struct wpa_supplicant *wpa_s)
2193 {
2194         struct wpa_ssid *ssid = wpa_s->current_ssid;
2195         if (ssid && ssid->mode != WPAS_MODE_INFRA)
2196                 return;
2197
2198 #if 0 /* FIX */
2199         if (local->hw->reset_tsf) {
2200                 /* Reset own TSF to allow time synchronization work. */
2201                 local->hw->reset_tsf(local->mdev);
2202         }
2203 #endif
2204
2205         wpa_s->mlme.wmm_last_param_set = -1; /* allow any WMM update */
2206
2207
2208         if (wpa_s->mlme.auth_algs & WPA_AUTH_ALG_OPEN)
2209                 wpa_s->mlme.auth_alg = WLAN_AUTH_OPEN;
2210         else if (wpa_s->mlme.auth_algs & WPA_AUTH_ALG_SHARED)
2211                 wpa_s->mlme.auth_alg = WLAN_AUTH_SHARED_KEY;
2212         else if (wpa_s->mlme.auth_algs & WPA_AUTH_ALG_LEAP)
2213                 wpa_s->mlme.auth_alg = WLAN_AUTH_LEAP;
2214         else
2215                 wpa_s->mlme.auth_alg = WLAN_AUTH_OPEN;
2216         wpa_printf(MSG_DEBUG, "MLME: Initial auth_alg=%d",
2217                    wpa_s->mlme.auth_alg);
2218         wpa_s->mlme.auth_transaction = -1;
2219         wpa_s->mlme.auth_tries = wpa_s->mlme.assoc_tries = 0;
2220         ieee80211_authenticate(wpa_s);
2221 }
2222
2223
2224 static int ieee80211_ibss_allowed(struct wpa_supplicant *wpa_s)
2225 {
2226 #if 0 /* FIX */
2227         int m, c;
2228
2229         for (m = 0; m < local->hw->num_modes; m++) {
2230                 struct ieee80211_hw_modes *mode = &local->hw->modes[m];
2231                 if (mode->mode != local->conf.phymode)
2232                         continue;
2233                 for (c = 0; c < mode->num_channels; c++) {
2234                         struct ieee80211_channel *chan = &mode->channels[c];
2235                         if (chan->flag & IEEE80211_CHAN_W_SCAN &&
2236                             chan->chan == local->conf.channel) {
2237                                 if (chan->flag & IEEE80211_CHAN_W_IBSS)
2238                                         return 1;
2239                                 break;
2240                         }
2241                 }
2242         }
2243 #endif
2244
2245         return 0;
2246 }
2247
2248
2249 static int ieee80211_sta_join_ibss(struct wpa_supplicant *wpa_s,
2250                                    struct ieee80211_sta_bss *bss)
2251 {
2252         int res = 0, rates, done = 0, bssid_changed;
2253         struct ieee80211_mgmt *mgmt;
2254 #if 0 /* FIX */
2255         struct ieee80211_tx_control control;
2256         struct ieee80211_rate *rate;
2257         struct rate_control_extra extra;
2258 #endif
2259         u8 *pos, *buf;
2260         size_t len;
2261
2262         /* Remove possible STA entries from other IBSS networks. */
2263 #if 0 /* FIX */
2264         sta_info_flush(local, NULL);
2265
2266         if (local->hw->reset_tsf) {
2267                 /* Reset own TSF to allow time synchronization work. */
2268                 local->hw->reset_tsf(local->mdev);
2269         }
2270 #endif
2271         bssid_changed = os_memcmp(wpa_s->bssid, bss->bssid, ETH_ALEN);
2272         os_memcpy(wpa_s->bssid, bss->bssid, ETH_ALEN);
2273         if (bssid_changed)
2274                 wpas_notify_bssid_changed(wpa_s);
2275
2276 #if 0 /* FIX */
2277         local->conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;
2278
2279         sdata->drop_unencrypted = bss->capability &
2280                 host_to_le16(WLAN_CAPABILITY_PRIVACY) ? 1 : 0;
2281 #endif
2282
2283 #if 0 /* FIX */
2284         os_memset(&rq, 0, sizeof(rq));
2285         rq.m = bss->freq * 100000;
2286         rq.e = 1;
2287         res = ieee80211_ioctl_siwfreq(wpa_s, NULL, &rq, NULL);
2288 #endif
2289
2290         if (!ieee80211_ibss_allowed(wpa_s)) {
2291 #if 0 /* FIX */
2292                 wpa_printf(MSG_DEBUG, "MLME: IBSS not allowed on channel %d "
2293                            "(%d MHz)", local->conf.channel,
2294                            local->conf.freq);
2295 #endif
2296                 return -1;
2297         }
2298
2299         /* Set beacon template based on scan results */
2300         buf = os_malloc(400);
2301         len = 0;
2302         do {
2303                 if (buf == NULL)
2304                         break;
2305
2306                 mgmt = (struct ieee80211_mgmt *) buf;
2307                 len += 24 + sizeof(mgmt->u.beacon);
2308                 os_memset(mgmt, 0, 24 + sizeof(mgmt->u.beacon));
2309                 mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
2310                                                    WLAN_FC_STYPE_BEACON);
2311                 os_memset(mgmt->da, 0xff, ETH_ALEN);
2312                 os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
2313                 os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
2314 #if 0 /* FIX */
2315                 mgmt->u.beacon.beacon_int =
2316                         host_to_le16(local->conf.beacon_int);
2317 #endif
2318                 mgmt->u.beacon.capab_info = host_to_le16(bss->capability);
2319
2320                 pos = buf + len;
2321                 len += 2 + wpa_s->mlme.ssid_len;
2322                 *pos++ = WLAN_EID_SSID;
2323                 *pos++ = wpa_s->mlme.ssid_len;
2324                 os_memcpy(pos, wpa_s->mlme.ssid, wpa_s->mlme.ssid_len);
2325
2326                 rates = bss->supp_rates_len;
2327                 if (rates > 8)
2328                         rates = 8;
2329                 pos = buf + len;
2330                 len += 2 + rates;
2331                 *pos++ = WLAN_EID_SUPP_RATES;
2332                 *pos++ = rates;
2333                 os_memcpy(pos, bss->supp_rates, rates);
2334
2335                 pos = buf + len;
2336                 len += 2 + 1;
2337                 *pos++ = WLAN_EID_DS_PARAMS;
2338                 *pos++ = 1;
2339                 *pos++ = bss->channel;
2340
2341                 pos = buf + len;
2342                 len += 2 + 2;
2343                 *pos++ = WLAN_EID_IBSS_PARAMS;
2344                 *pos++ = 2;
2345                 /* FIX: set ATIM window based on scan results */
2346                 *pos++ = 0;
2347                 *pos++ = 0;
2348
2349                 if (bss->supp_rates_len > 8) {
2350                         rates = bss->supp_rates_len - 8;
2351                         pos = buf + len;
2352                         len += 2 + rates;
2353                         *pos++ = WLAN_EID_EXT_SUPP_RATES;
2354                         *pos++ = rates;
2355                         os_memcpy(pos, &bss->supp_rates[8], rates);
2356                 }
2357
2358 #if 0 /* FIX */
2359                 os_memset(&control, 0, sizeof(control));
2360                 control.pkt_type = PKT_PROBE_RESP;
2361                 os_memset(&extra, 0, sizeof(extra));
2362                 extra.endidx = local->num_curr_rates;
2363                 rate = rate_control_get_rate(wpa_s, skb, &extra);
2364                 if (rate == NULL) {
2365                         wpa_printf(MSG_DEBUG, "MLME: Failed to determine TX "
2366                                    "rate for IBSS beacon");
2367                         break;
2368                 }
2369                 control.tx_rate = (wpa_s->mlme.short_preamble &&
2370                                    (rate->flags & IEEE80211_RATE_PREAMBLE2)) ?
2371                         rate->val2 : rate->val;
2372                 control.antenna_sel = local->conf.antenna_sel;
2373                 control.power_level = local->conf.power_level;
2374                 control.no_ack = 1;
2375                 control.retry_limit = 1;
2376                 control.rts_cts_duration = 0;
2377 #endif
2378
2379 #if 0 /* FIX */
2380                 wpa_s->mlme.probe_resp = skb_copy(skb, GFP_ATOMIC);
2381                 if (wpa_s->mlme.probe_resp) {
2382                         mgmt = (struct ieee80211_mgmt *)
2383                                 wpa_s->mlme.probe_resp->data;
2384                         mgmt->frame_control =
2385                                 IEEE80211_FC(WLAN_FC_TYPE_MGMT,
2386                                              WLAN_FC_STYPE_PROBE_RESP);
2387                 } else {
2388                         wpa_printf(MSG_DEBUG, "MLME: Could not allocate "
2389                                    "ProbeResp template for IBSS");
2390                 }
2391
2392                 if (local->hw->beacon_update &&
2393                     local->hw->beacon_update(wpa_s, skb, &control) == 0) {
2394                         wpa_printf(MSG_DEBUG, "MLME: Configured IBSS beacon "
2395                                    "template based on scan results");
2396                         skb = NULL;
2397                 }
2398
2399                 rates = 0;
2400                 for (i = 0; i < bss->supp_rates_len; i++) {
2401                         int rate = (bss->supp_rates[i] & 0x7f) * 5;
2402                         if (local->conf.phymode == MODE_ATHEROS_TURBO)
2403                                 rate *= 2;
2404                         for (j = 0; j < local->num_curr_rates; j++)
2405                                 if (local->curr_rates[j] == rate)
2406                                         rates |= BIT(j);
2407                 }
2408                 wpa_s->mlme.supp_rates_bits = rates;
2409 #endif
2410                 done = 1;
2411         } while (0);
2412
2413         os_free(buf);
2414         if (!done) {
2415                 wpa_printf(MSG_DEBUG, "MLME: Failed to configure IBSS beacon "
2416                            "template");
2417         }
2418
2419         wpa_s->mlme.state = IEEE80211_IBSS_JOINED;
2420         ieee80211_reschedule_timer(wpa_s, IEEE80211_IBSS_MERGE_INTERVAL);
2421
2422         return res;
2423 }
2424
2425
2426 #if 0 /* FIX */
2427 static int ieee80211_sta_create_ibss(struct wpa_supplicant *wpa_s)
2428 {
2429         struct ieee80211_sta_bss *bss;
2430         u8 bssid[ETH_ALEN], *pos;
2431         int i;
2432
2433 #if 0
2434         /* Easier testing, use fixed BSSID. */
2435         os_memset(bssid, 0xfe, ETH_ALEN);
2436 #else
2437         /* Generate random, not broadcast, locally administered BSSID. Mix in
2438          * own MAC address to make sure that devices that do not have proper
2439          * random number generator get different BSSID. */
2440         os_get_random(bssid, ETH_ALEN);
2441         for (i = 0; i < ETH_ALEN; i++)
2442                 bssid[i] ^= wpa_s->own_addr[i];
2443         bssid[0] &= ~0x01;
2444         bssid[0] |= 0x02;
2445 #endif
2446
2447         wpa_printf(MSG_DEBUG, "MLME: Creating new IBSS network, BSSID "
2448                    MACSTR "", MAC2STR(bssid));
2449
2450         bss = ieee80211_bss_add(wpa_s, bssid);
2451         if (bss == NULL)
2452                 return -ENOMEM;
2453
2454 #if 0 /* FIX */
2455         if (local->conf.beacon_int == 0)
2456                 local->conf.beacon_int = 100;
2457         bss->beacon_int = local->conf.beacon_int;
2458         bss->hw_mode = local->conf.phymode;
2459         bss->channel = local->conf.channel;
2460         bss->freq = local->conf.freq;
2461 #endif
2462         os_get_time(&bss->last_update);
2463         bss->capability = host_to_le16(WLAN_CAPABILITY_IBSS);
2464 #if 0 /* FIX */
2465         if (sdata->default_key) {
2466                 bss->capability |= host_to_le16(WLAN_CAPABILITY_PRIVACY);
2467         } else
2468                 sdata->drop_unencrypted = 0;
2469         bss->supp_rates_len = local->num_curr_rates;
2470 #endif
2471         pos = bss->supp_rates;
2472 #if 0 /* FIX */
2473         for (i = 0; i < local->num_curr_rates; i++) {
2474                 int rate = local->curr_rates[i];
2475                 if (local->conf.phymode == MODE_ATHEROS_TURBO)
2476                         rate /= 2;
2477                 *pos++ = (u8) (rate / 5);
2478         }
2479 #endif
2480
2481         return ieee80211_sta_join_ibss(wpa_s, bss);
2482 }
2483 #endif
2484
2485
2486 static int ieee80211_sta_find_ibss(struct wpa_supplicant *wpa_s)
2487 {
2488         struct ieee80211_sta_bss *bss;
2489         int found = 0;
2490         u8 bssid[ETH_ALEN];
2491         int active_ibss;
2492         struct os_time now;
2493
2494         if (wpa_s->mlme.ssid_len == 0)
2495                 return -EINVAL;
2496
2497         active_ibss = ieee80211_sta_active_ibss(wpa_s);
2498 #ifdef IEEE80211_IBSS_DEBUG
2499         wpa_printf(MSG_DEBUG, "MLME: sta_find_ibss (active_ibss=%d)",
2500                    active_ibss);
2501 #endif /* IEEE80211_IBSS_DEBUG */
2502         for (bss = wpa_s->mlme.sta_bss_list; bss; bss = bss->next) {
2503                 if (wpa_s->mlme.ssid_len != bss->ssid_len ||
2504                     os_memcmp(wpa_s->mlme.ssid, bss->ssid, bss->ssid_len) != 0
2505                     || !(bss->capability & WLAN_CAPABILITY_IBSS))
2506                         continue;
2507 #ifdef IEEE80211_IBSS_DEBUG
2508                 wpa_printf(MSG_DEBUG, "   bssid=" MACSTR " found",
2509                            MAC2STR(bss->bssid));
2510 #endif /* IEEE80211_IBSS_DEBUG */
2511                 os_memcpy(bssid, bss->bssid, ETH_ALEN);
2512                 found = 1;
2513                 if (active_ibss ||
2514                     os_memcmp(bssid, wpa_s->bssid, ETH_ALEN) != 0)
2515                         break;
2516         }
2517
2518 #ifdef IEEE80211_IBSS_DEBUG
2519         wpa_printf(MSG_DEBUG, "   sta_find_ibss: selected " MACSTR " current "
2520                    MACSTR, MAC2STR(bssid), MAC2STR(wpa_s->bssid));
2521 #endif /* IEEE80211_IBSS_DEBUG */
2522         if (found && os_memcmp(wpa_s->bssid, bssid, ETH_ALEN) != 0 &&
2523             (bss = ieee80211_bss_get(wpa_s, bssid))) {
2524                 wpa_printf(MSG_DEBUG, "MLME: Selected IBSS BSSID " MACSTR
2525                            " based on configured SSID",
2526                            MAC2STR(bssid));
2527                 return ieee80211_sta_join_ibss(wpa_s, bss);
2528         }
2529 #ifdef IEEE80211_IBSS_DEBUG
2530         wpa_printf(MSG_DEBUG, "   did not try to join ibss");
2531 #endif /* IEEE80211_IBSS_DEBUG */
2532
2533         /* Selected IBSS not found in current scan results - try to scan */
2534         os_get_time(&now);
2535 #if 0 /* FIX */
2536         if (wpa_s->mlme.state == IEEE80211_IBSS_JOINED &&
2537             !ieee80211_sta_active_ibss(wpa_s)) {
2538                 ieee80211_reschedule_timer(wpa_s,
2539                                            IEEE80211_IBSS_MERGE_INTERVAL);
2540         } else if (time_after(jiffies, wpa_s->mlme.last_scan_completed +
2541                               IEEE80211_SCAN_INTERVAL)) {
2542                 wpa_printf(MSG_DEBUG, "MLME: Trigger new scan to find an IBSS "
2543                            "to join");
2544                 return ieee80211_sta_req_scan(wpa_s->mlme.ssid,
2545                                               wpa_s->mlme.ssid_len);
2546         } else if (wpa_s->mlme.state != IEEE80211_IBSS_JOINED) {
2547                 int interval = IEEE80211_SCAN_INTERVAL;
2548
2549                 if (time_after(jiffies, wpa_s->mlme.ibss_join_req +
2550                                IEEE80211_IBSS_JOIN_TIMEOUT)) {
2551                         if (wpa_s->mlme.create_ibss &&
2552                             ieee80211_ibss_allowed(wpa_s))
2553                                 return ieee80211_sta_create_ibss(wpa_s);
2554                         if (wpa_s->mlme.create_ibss) {
2555                                 wpa_printf(MSG_DEBUG, "MLME: IBSS not allowed "
2556                                            "on the configured channel %d "
2557                                            "(%d MHz)",
2558                                            local->conf.channel,
2559                                            local->conf.freq);
2560                         }
2561
2562                         /* No IBSS found - decrease scan interval and continue
2563                          * scanning. */
2564                         interval = IEEE80211_SCAN_INTERVAL_SLOW;
2565                 }
2566
2567                 wpa_s->mlme.state = IEEE80211_IBSS_SEARCH;
2568                 ieee80211_reschedule_timer(wpa_s, interval);
2569                 return 0;
2570         }
2571 #endif
2572
2573         return 0;
2574 }
2575
2576
2577 int ieee80211_sta_get_ssid(struct wpa_supplicant *wpa_s, u8 *ssid,
2578                            size_t *len)
2579 {
2580         os_memcpy(ssid, wpa_s->mlme.ssid, wpa_s->mlme.ssid_len);
2581         *len = wpa_s->mlme.ssid_len;
2582         return 0;
2583 }
2584
2585
2586 int ieee80211_sta_associate(struct wpa_supplicant *wpa_s,
2587                             struct wpa_driver_associate_params *params)
2588 {
2589         struct ieee80211_sta_bss *bss;
2590         int bssid_changed;
2591
2592         wpa_s->mlme.bssid_set = 0;
2593         wpa_s->mlme.freq = params->freq;
2594         if (params->bssid) {
2595                 bssid_changed = os_memcmp(wpa_s->bssid, params->bssid,
2596                                           ETH_ALEN);
2597                 os_memcpy(wpa_s->bssid, params->bssid, ETH_ALEN);
2598                 if (bssid_changed)
2599                         wpas_notify_bssid_changed(wpa_s);
2600
2601                 if (!is_zero_ether_addr(params->bssid))
2602                         wpa_s->mlme.bssid_set = 1;
2603                 bss = ieee80211_bss_get(wpa_s, wpa_s->bssid);
2604                 if (bss) {
2605                         wpa_s->mlme.phymode = bss->hw_mode;
2606                         wpa_s->mlme.channel = bss->channel;
2607                         wpa_s->mlme.freq = bss->freq;
2608                 }
2609         }
2610
2611 #if 0 /* FIX */
2612         /* TODO: This should always be done for IBSS, even if IEEE80211_QOS is
2613          * not defined. */
2614         if (local->hw->conf_tx) {
2615                 struct ieee80211_tx_queue_params qparam;
2616                 int i;
2617
2618                 os_memset(&qparam, 0, sizeof(qparam));
2619                 /* TODO: are these ok defaults for all hw_modes? */
2620                 qparam.aifs = 2;
2621                 qparam.cw_min =
2622                         local->conf.phymode == MODE_IEEE80211B ? 31 : 15;
2623                 qparam.cw_max = 1023;
2624                 qparam.burst_time = 0;
2625                 for (i = IEEE80211_TX_QUEUE_DATA0; i < NUM_TX_DATA_QUEUES; i++)
2626                 {
2627                         local->hw->conf_tx(wpa_s, i + IEEE80211_TX_QUEUE_DATA0,
2628                                            &qparam);
2629                 }
2630                 /* IBSS uses different parameters for Beacon sending */
2631                 qparam.cw_min++;
2632                 qparam.cw_min *= 2;
2633                 qparam.cw_min--;
2634                 local->hw->conf_tx(wpa_s, IEEE80211_TX_QUEUE_BEACON, &qparam);
2635         }
2636 #endif
2637
2638         if (wpa_s->mlme.ssid_len != params->ssid_len ||
2639             os_memcmp(wpa_s->mlme.ssid, params->ssid, params->ssid_len) != 0)
2640                 wpa_s->mlme.prev_bssid_set = 0;
2641         os_memcpy(wpa_s->mlme.ssid, params->ssid, params->ssid_len);
2642         os_memset(wpa_s->mlme.ssid + params->ssid_len, 0,
2643                   MAX_SSID_LEN - params->ssid_len);
2644         wpa_s->mlme.ssid_len = params->ssid_len;
2645         wpa_s->mlme.ssid_set = 1;
2646
2647         os_free(wpa_s->mlme.extra_ie);
2648         if (params->wpa_ie == NULL || params->wpa_ie_len == 0) {
2649                 wpa_s->mlme.extra_ie = NULL;
2650                 wpa_s->mlme.extra_ie_len = 0;
2651         } else {
2652                 wpa_s->mlme.extra_ie = os_malloc(params->wpa_ie_len);
2653                 if (wpa_s->mlme.extra_ie == NULL) {
2654                         wpa_s->mlme.extra_ie_len = 0;
2655                         return -1;
2656                 }
2657                 os_memcpy(wpa_s->mlme.extra_ie, params->wpa_ie,
2658                           params->wpa_ie_len);
2659                 wpa_s->mlme.extra_ie_len = params->wpa_ie_len;
2660         }
2661
2662         wpa_s->mlme.key_mgmt = params->key_mgmt_suite;
2663
2664         ieee80211_sta_set_channel(wpa_s, wpa_s->mlme.phymode,
2665                                   wpa_s->mlme.channel, wpa_s->mlme.freq);
2666
2667         if (params->mode == WPAS_MODE_IBSS && !wpa_s->mlme.bssid_set) {
2668                 os_get_time(&wpa_s->mlme.ibss_join_req);
2669                 wpa_s->mlme.state = IEEE80211_IBSS_SEARCH;
2670                 return ieee80211_sta_find_ibss(wpa_s);
2671         }
2672
2673         if (wpa_s->mlme.bssid_set)
2674                 ieee80211_sta_new_auth(wpa_s);
2675
2676         return 0;
2677 }
2678
2679
2680 static void ieee80211_sta_save_oper_chan(struct wpa_supplicant *wpa_s)
2681 {
2682         wpa_s->mlme.scan_oper_channel = wpa_s->mlme.channel;
2683         wpa_s->mlme.scan_oper_freq = wpa_s->mlme.freq;
2684         wpa_s->mlme.scan_oper_phymode = wpa_s->mlme.phymode;
2685 }
2686
2687
2688 static int ieee80211_sta_restore_oper_chan(struct wpa_supplicant *wpa_s)
2689 {
2690         wpa_s->mlme.channel = wpa_s->mlme.scan_oper_channel;
2691         wpa_s->mlme.freq = wpa_s->mlme.scan_oper_freq;
2692         wpa_s->mlme.phymode = wpa_s->mlme.scan_oper_phymode;
2693         if (wpa_s->mlme.freq == 0)
2694                 return 0;
2695         return ieee80211_sta_set_channel(wpa_s, wpa_s->mlme.phymode,
2696                                          wpa_s->mlme.channel,
2697                                          wpa_s->mlme.freq);
2698 }
2699
2700
2701 static int ieee80211_active_scan(struct wpa_supplicant *wpa_s)
2702 {
2703         size_t m;
2704         int c;
2705
2706         for (m = 0; m < wpa_s->mlme.num_modes; m++) {
2707                 struct hostapd_hw_modes *mode = &wpa_s->mlme.modes[m];
2708                 if ((int) mode->mode != (int) wpa_s->mlme.phymode)
2709                         continue;
2710                 for (c = 0; c < mode->num_channels; c++) {
2711                         struct hostapd_channel_data *chan = &mode->channels[c];
2712                         if (!(chan->flag & HOSTAPD_CHAN_DISABLED) &&
2713                             chan->chan == wpa_s->mlme.channel) {
2714                                 if (!(chan->flag & HOSTAPD_CHAN_PASSIVE_SCAN))
2715                                         return 1;
2716                                 break;
2717                         }
2718                 }
2719         }
2720
2721         return 0;
2722 }
2723
2724
2725 static void ieee80211_sta_scan_timer(void *eloop_ctx, void *timeout_ctx)
2726 {
2727         struct wpa_supplicant *wpa_s = eloop_ctx;
2728         struct hostapd_hw_modes *mode;
2729         struct hostapd_channel_data *chan;
2730         int skip = 0;
2731         int timeout = 0;
2732         struct wpa_ssid *ssid = wpa_s->current_ssid;
2733         int adhoc;
2734
2735         if (!wpa_s->mlme.sta_scanning || wpa_s->mlme.modes == NULL)
2736                 return;
2737
2738         adhoc = ssid && ssid->mode == 1;
2739
2740         switch (wpa_s->mlme.scan_state) {
2741         case SCAN_SET_CHANNEL:
2742                 mode = &wpa_s->mlme.modes[wpa_s->mlme.scan_hw_mode_idx];
2743                 if (wpa_s->mlme.scan_hw_mode_idx >=
2744                     (int) wpa_s->mlme.num_modes ||
2745                     (wpa_s->mlme.scan_hw_mode_idx + 1 ==
2746                      (int) wpa_s->mlme.num_modes
2747                      && wpa_s->mlme.scan_channel_idx >= mode->num_channels)) {
2748                         if (ieee80211_sta_restore_oper_chan(wpa_s)) {
2749                                 wpa_printf(MSG_DEBUG, "MLME: failed to "
2750                                            "restore operational channel after "
2751                                            "scan");
2752                         }
2753                         wpa_printf(MSG_DEBUG, "MLME: scan completed");
2754                         wpa_s->mlme.sta_scanning = 0;
2755                         os_get_time(&wpa_s->mlme.last_scan_completed);
2756                         wpa_supplicant_event(wpa_s, EVENT_SCAN_RESULTS, NULL);
2757                         if (adhoc) {
2758                                 if (!wpa_s->mlme.bssid_set ||
2759                                     (wpa_s->mlme.state ==
2760                                      IEEE80211_IBSS_JOINED &&
2761                                      !ieee80211_sta_active_ibss(wpa_s)))
2762                                         ieee80211_sta_find_ibss(wpa_s);
2763                         }
2764                         return;
2765                 }
2766                 skip = !(wpa_s->mlme.hw_modes & (1 << mode->mode));
2767                 chan = &mode->channels[wpa_s->mlme.scan_channel_idx];
2768                 if ((chan->flag & HOSTAPD_CHAN_DISABLED) ||
2769                     (adhoc && (chan->flag & HOSTAPD_CHAN_NO_IBSS)) ||
2770                     (wpa_s->mlme.hw_modes & (1 << HOSTAPD_MODE_IEEE80211G) &&
2771                      mode->mode == HOSTAPD_MODE_IEEE80211B &&
2772                      wpa_s->mlme.scan_skip_11b))
2773                         skip = 1;
2774                 if (!skip && wpa_s->mlme.scan_freqs) {
2775                         int i, found = 0;
2776                         for (i = 0; wpa_s->mlme.scan_freqs[i]; i++) {
2777                                 if (wpa_s->mlme.scan_freqs[i] == chan->freq) {
2778                                         found = 1;
2779                                         break;
2780                                 }
2781                         }
2782                         if (!found)
2783                                 skip = 1;
2784                 }
2785
2786                 if (!skip) {
2787                         wpa_printf(MSG_MSGDUMP,
2788                                    "MLME: scan channel %d (%d MHz)",
2789                                    chan->chan, chan->freq);
2790
2791                         wpa_s->mlme.channel = chan->chan;
2792                         wpa_s->mlme.freq = chan->freq;
2793                         wpa_s->mlme.phymode = mode->mode;
2794                         if (ieee80211_sta_set_channel(wpa_s, mode->mode,
2795                                                       chan->chan, chan->freq))
2796                         {
2797                                 wpa_printf(MSG_DEBUG, "MLME: failed to set "
2798                                            "channel %d (%d MHz) for scan",
2799                                            chan->chan, chan->freq);
2800                                 skip = 1;
2801                         }
2802                 }
2803
2804                 wpa_s->mlme.scan_channel_idx++;
2805                 if (wpa_s->mlme.scan_channel_idx >=
2806                     wpa_s->mlme.modes[wpa_s->mlme.scan_hw_mode_idx].
2807                     num_channels) {
2808                         wpa_s->mlme.scan_hw_mode_idx++;
2809                         wpa_s->mlme.scan_channel_idx = 0;
2810                 }
2811
2812                 if (skip) {
2813                         timeout = 0;
2814                         break;
2815                 }
2816
2817                 timeout = IEEE80211_PROBE_DELAY;
2818                 wpa_s->mlme.scan_state = SCAN_SEND_PROBE;
2819                 break;
2820         case SCAN_SEND_PROBE:
2821                 if (ieee80211_active_scan(wpa_s)) {
2822                         ieee80211_send_probe_req(wpa_s, NULL,
2823                                                  wpa_s->mlme.scan_ssid,
2824                                                  wpa_s->mlme.scan_ssid_len);
2825                         timeout = IEEE80211_CHANNEL_TIME;
2826                 } else {
2827                         timeout = IEEE80211_PASSIVE_CHANNEL_TIME;
2828                 }
2829                 wpa_s->mlme.scan_state = SCAN_SET_CHANNEL;
2830                 break;
2831         }
2832
2833         eloop_register_timeout(timeout / 1000, 1000 * (timeout % 1000),
2834                                ieee80211_sta_scan_timer, wpa_s, NULL);
2835 }
2836
2837
2838 int ieee80211_sta_req_scan(struct wpa_supplicant *wpa_s,
2839                            struct wpa_driver_scan_params *params)
2840 {
2841         const u8 *ssid = params->ssids[0].ssid;
2842         size_t ssid_len = params->ssids[0].ssid_len;
2843
2844         if (ssid_len > MAX_SSID_LEN)
2845                 return -1;
2846
2847         /* MLME-SCAN.request (page 118)  page 144 (11.1.3.1)
2848          * BSSType: INFRASTRUCTURE, INDEPENDENT, ANY_BSS
2849          * BSSID: MACAddress
2850          * SSID
2851          * ScanType: ACTIVE, PASSIVE
2852          * ProbeDelay: delay (in microseconds) to be used prior to transmitting
2853          *    a Probe frame during active scanning
2854          * ChannelList
2855          * MinChannelTime (>= ProbeDelay), in TU
2856          * MaxChannelTime: (>= MinChannelTime), in TU
2857          */
2858
2859          /* MLME-SCAN.confirm
2860           * BSSDescriptionSet
2861           * ResultCode: SUCCESS, INVALID_PARAMETERS
2862          */
2863
2864         /* TODO: if assoc, move to power save mode for the duration of the
2865          * scan */
2866
2867         if (wpa_s->mlme.sta_scanning)
2868                 return -1;
2869
2870         wpa_printf(MSG_DEBUG, "MLME: starting scan");
2871
2872         ieee80211_sta_set_probe_req_ie(wpa_s, params->extra_ies,
2873                                        params->extra_ies_len);
2874
2875         os_free(wpa_s->mlme.scan_freqs);
2876         if (params->freqs) {
2877                 int i;
2878                 for (i = 0; params->freqs[i]; i++)
2879                         ;
2880                 wpa_s->mlme.scan_freqs = os_malloc((i + 1) * sizeof(int));
2881                 if (wpa_s->mlme.scan_freqs)
2882                         os_memcpy(wpa_s->mlme.scan_freqs, params->freqs,
2883                                   (i + 1) * sizeof(int));
2884         } else
2885                 wpa_s->mlme.scan_freqs = NULL;
2886
2887         ieee80211_sta_save_oper_chan(wpa_s);
2888
2889         wpa_s->mlme.sta_scanning = 1;
2890         /* TODO: stop TX queue? */
2891
2892         if (ssid) {
2893                 wpa_s->mlme.scan_ssid_len = ssid_len;
2894                 os_memcpy(wpa_s->mlme.scan_ssid, ssid, ssid_len);
2895         } else
2896                 wpa_s->mlme.scan_ssid_len = 0;
2897         wpa_s->mlme.scan_skip_11b = 1; /* FIX: clear this is 11g is not
2898                                         * supported */
2899         wpa_s->mlme.scan_state = SCAN_SET_CHANNEL;
2900         wpa_s->mlme.scan_hw_mode_idx = 0;
2901         wpa_s->mlme.scan_channel_idx = 0;
2902         eloop_register_timeout(0, 1, ieee80211_sta_scan_timer, wpa_s, NULL);
2903
2904         return 0;
2905 }
2906
2907
2908 struct wpa_scan_results *
2909 ieee80211_sta_get_scan_results(struct wpa_supplicant *wpa_s)
2910 {
2911         size_t ap_num = 0;
2912         struct wpa_scan_results *res;
2913         struct wpa_scan_res *r;
2914         struct ieee80211_sta_bss *bss;
2915
2916         res = os_zalloc(sizeof(*res));
2917         for (bss = wpa_s->mlme.sta_bss_list; bss; bss = bss->next)
2918                 ap_num++;
2919         res->res = os_zalloc(ap_num * sizeof(struct wpa_scan_res *));
2920         if (res->res == NULL) {
2921                 os_free(res);
2922                 return NULL;
2923         }
2924
2925         for (bss = wpa_s->mlme.sta_bss_list; bss; bss = bss->next) {
2926                 r = os_zalloc(sizeof(*r) + bss->ie_len);
2927                 if (r == NULL)
2928                         break;
2929                 os_memcpy(r->bssid, bss->bssid, ETH_ALEN);
2930                 r->freq = bss->freq;
2931                 r->beacon_int = bss->beacon_int;
2932                 r->caps = bss->capability;
2933                 r->level = bss->rssi;
2934                 r->tsf = bss->timestamp;
2935                 if (bss->ie) {
2936                         r->ie_len = bss->ie_len;
2937                         os_memcpy(r + 1, bss->ie, bss->ie_len);
2938                 }
2939
2940                 res->res[res->num++] = r;
2941         }
2942
2943         return res;
2944 }
2945
2946
2947 #if 0 /* FIX */
2948 struct sta_info * ieee80211_ibss_add_sta(struct wpa_supplicant *wpa_s,
2949                                          struct sk_buff *skb, u8 *bssid,
2950                                          u8 *addr)
2951 {
2952         struct ieee80211_local *local = dev->priv;
2953         struct list_head *ptr;
2954         struct sta_info *sta;
2955         struct wpa_supplicant *sta_dev = NULL;
2956
2957         /* TODO: Could consider removing the least recently used entry and
2958          * allow new one to be added. */
2959         if (local->num_sta >= IEEE80211_IBSS_MAX_STA_ENTRIES) {
2960                 if (net_ratelimit()) {
2961                         wpa_printf(MSG_DEBUG, "MLME: No room for a new IBSS "
2962                                    "STA entry " MACSTR, MAC2STR(addr));
2963                 }
2964                 return NULL;
2965         }
2966
2967         spin_lock_bh(&local->sub_if_lock);
2968         list_for_each(ptr, &local->sub_if_list) {
2969                 sdata = list_entry(ptr, struct ieee80211_sub_if_data, list);
2970                 if (sdata->type == IEEE80211_SUB_IF_TYPE_STA &&
2971                     os_memcmp(bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) {
2972                         sta_dev = sdata->dev;
2973                         break;
2974                 }
2975         }
2976         spin_unlock_bh(&local->sub_if_lock);
2977
2978         if (sta_dev == NULL)
2979                 return NULL;
2980
2981         wpa_printf(MSG_DEBUG, "MLME: Adding new IBSS station " MACSTR
2982                    " (dev=%s)", MAC2STR(addr), sta_dev->name);
2983
2984         sta = sta_info_add(wpa_s, addr);
2985         if (sta == NULL) {
2986                 return NULL;
2987         }
2988
2989         sta->dev = sta_dev;
2990         sta->supp_rates = wpa_s->mlme.supp_rates_bits;
2991
2992         rate_control_rate_init(local, sta);
2993
2994         return sta; /* caller will call sta_info_release() */
2995 }
2996 #endif
2997
2998
2999 int ieee80211_sta_deauthenticate(struct wpa_supplicant *wpa_s, u16 reason)
3000 {
3001         wpa_printf(MSG_DEBUG, "MLME: deauthenticate(reason=%d)", reason);
3002
3003         ieee80211_send_deauth(wpa_s, reason);
3004         ieee80211_set_associated(wpa_s, 0);
3005         return 0;
3006 }
3007
3008
3009 int ieee80211_sta_disassociate(struct wpa_supplicant *wpa_s, u16 reason)
3010 {
3011         wpa_printf(MSG_DEBUG, "MLME: disassociate(reason=%d)", reason);
3012
3013         if (!wpa_s->mlme.associated)
3014                 return -1;
3015
3016         ieee80211_send_disassoc(wpa_s, reason);
3017         ieee80211_set_associated(wpa_s, 0);
3018         return 0;
3019 }
3020
3021
3022 void ieee80211_sta_rx(struct wpa_supplicant *wpa_s, const u8 *buf, size_t len,
3023                       struct ieee80211_rx_status *rx_status)
3024 {
3025         struct ieee80211_mgmt *mgmt;
3026         u16 fc;
3027         const u8 *pos;
3028
3029         /* wpa_hexdump(MSG_MSGDUMP, "MLME: Received frame", buf, len); */
3030
3031         if (wpa_s->mlme.sta_scanning) {
3032                 ieee80211_sta_rx_scan(wpa_s, buf, len, rx_status);
3033                 return;
3034         }
3035
3036         if (len < 24)
3037                 return;
3038
3039         mgmt = (struct ieee80211_mgmt *) buf;
3040         fc = le_to_host16(mgmt->frame_control);
3041
3042         if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT)
3043                 ieee80211_sta_rx_mgmt(wpa_s, buf, len, rx_status);
3044         else if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_DATA) {
3045                 if ((fc & (WLAN_FC_TODS | WLAN_FC_FROMDS)) !=
3046                     WLAN_FC_FROMDS)
3047                         return;
3048                 /* mgmt->sa is actually BSSID for FromDS data frames */
3049                 if (os_memcmp(mgmt->sa, wpa_s->bssid, ETH_ALEN) != 0)
3050                         return;
3051                 /* Skip IEEE 802.11 and LLC headers */
3052                 pos = buf + 24 + 6;
3053                 if (WPA_GET_BE16(pos) != ETH_P_EAPOL)
3054                         return;
3055                 pos += 2;
3056                 /* mgmt->bssid is actually BSSID for SA data frames */
3057                 wpa_supplicant_rx_eapol(wpa_s, mgmt->bssid,
3058                                         pos, buf + len - pos);
3059         }
3060 }
3061
3062
3063 void ieee80211_sta_free_hw_features(struct hostapd_hw_modes *hw_features,
3064                                     size_t num_hw_features)
3065 {
3066         size_t i;
3067
3068         if (hw_features == NULL)
3069                 return;
3070
3071         for (i = 0; i < num_hw_features; i++) {
3072                 os_free(hw_features[i].channels);
3073                 os_free(hw_features[i].rates);
3074         }
3075
3076         os_free(hw_features);
3077 }
3078
3079
3080 int ieee80211_sta_init(struct wpa_supplicant *wpa_s)
3081 {
3082         u16 num_modes, flags;
3083
3084         wpa_s->mlme.modes = wpa_drv_get_hw_feature_data(wpa_s, &num_modes,
3085                                                         &flags);
3086         if (wpa_s->mlme.modes == NULL) {
3087                 wpa_printf(MSG_ERROR, "MLME: Failed to read supported "
3088                            "channels and rates from the driver");
3089                 return -1;
3090         }
3091
3092         wpa_s->mlme.num_modes = num_modes;
3093
3094         wpa_s->mlme.hw_modes = 1 << HOSTAPD_MODE_IEEE80211A;
3095         wpa_s->mlme.hw_modes |= 1 << HOSTAPD_MODE_IEEE80211B;
3096         wpa_s->mlme.hw_modes |= 1 << HOSTAPD_MODE_IEEE80211G;
3097
3098         wpa_s->mlme.wmm_enabled = 1;
3099
3100         return 0;
3101 }
3102
3103
3104 void ieee80211_sta_deinit(struct wpa_supplicant *wpa_s)
3105 {
3106         eloop_cancel_timeout(ieee80211_sta_timer, wpa_s, NULL);
3107         eloop_cancel_timeout(ieee80211_sta_scan_timer, wpa_s, NULL);
3108         os_free(wpa_s->mlme.extra_ie);
3109         wpa_s->mlme.extra_ie = NULL;
3110         os_free(wpa_s->mlme.extra_probe_ie);
3111         wpa_s->mlme.extra_probe_ie = NULL;
3112         os_free(wpa_s->mlme.assocreq_ies);
3113         wpa_s->mlme.assocreq_ies = NULL;
3114         os_free(wpa_s->mlme.assocresp_ies);
3115         wpa_s->mlme.assocresp_ies = NULL;
3116         ieee80211_bss_list_deinit(wpa_s);
3117         ieee80211_sta_free_hw_features(wpa_s->mlme.modes,
3118                                        wpa_s->mlme.num_modes);
3119 #ifdef CONFIG_IEEE80211R
3120         os_free(wpa_s->mlme.ft_ies);
3121         wpa_s->mlme.ft_ies = NULL;
3122         wpa_s->mlme.ft_ies_len = 0;
3123 #endif /* CONFIG_IEEE80211R */
3124
3125         os_free(wpa_s->mlme.scan_freqs);
3126         wpa_s->mlme.scan_freqs = NULL;
3127 }
3128
3129
3130 #ifdef CONFIG_IEEE80211R
3131
3132 int ieee80211_sta_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
3133                                 const u8 *ies, size_t ies_len)
3134 {
3135         if (md == NULL) {
3136                 wpa_printf(MSG_DEBUG, "MLME: Clear FT mobility domain");
3137                 os_memset(wpa_s->mlme.current_md, 0, MOBILITY_DOMAIN_ID_LEN);
3138         } else {
3139                 wpa_printf(MSG_DEBUG, "MLME: Update FT IEs for MD " MACSTR,
3140                            MAC2STR(md));
3141                 os_memcpy(wpa_s->mlme.current_md, md, MOBILITY_DOMAIN_ID_LEN);
3142         }
3143
3144         wpa_hexdump(MSG_DEBUG, "MLME: FT IEs", ies, ies_len);
3145         os_free(wpa_s->mlme.ft_ies);
3146         wpa_s->mlme.ft_ies = os_malloc(ies_len);
3147         if (wpa_s->mlme.ft_ies == NULL)
3148                 return -1;
3149         os_memcpy(wpa_s->mlme.ft_ies, ies, ies_len);
3150         wpa_s->mlme.ft_ies_len = ies_len;
3151
3152         return 0;
3153 }
3154
3155
3156 int ieee80211_sta_send_ft_action(struct wpa_supplicant *wpa_s, u8 action,
3157                                  const u8 *target_ap,
3158                                  const u8 *ies, size_t ies_len)
3159 {
3160         u8 *buf;
3161         size_t len;
3162         struct ieee80211_mgmt *mgmt;
3163         int res;
3164
3165         /*
3166          * Action frame payload:
3167          * Category[1] = 6 (Fast BSS Transition)
3168          * Action[1] = 1 (Fast BSS Transition Request)
3169          * STA Address
3170          * Target AP Address
3171          * FT IEs
3172          */
3173
3174         buf = os_zalloc(sizeof(*mgmt) + ies_len);
3175         if (buf == NULL) {
3176                 wpa_printf(MSG_DEBUG, "MLME: Failed to allocate buffer for "
3177                            "FT action frame");
3178                 return -1;
3179         }
3180
3181         mgmt = (struct ieee80211_mgmt *) buf;
3182         len = 24;
3183         os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
3184         os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
3185         os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
3186         mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
3187                                            WLAN_FC_STYPE_ACTION);
3188         mgmt->u.action.category = WLAN_ACTION_FT;
3189         mgmt->u.action.u.ft_action_req.action = action;
3190         os_memcpy(mgmt->u.action.u.ft_action_req.sta_addr, wpa_s->own_addr,
3191                   ETH_ALEN);
3192         os_memcpy(mgmt->u.action.u.ft_action_req.target_ap_addr, target_ap,
3193                   ETH_ALEN);
3194         os_memcpy(mgmt->u.action.u.ft_action_req.variable, ies, ies_len);
3195         len += 1 + sizeof(mgmt->u.action.u.ft_action_req) + ies_len;
3196
3197         wpa_printf(MSG_DEBUG, "MLME: Send FT Action Frame: Action=%d "
3198                    "Target AP=" MACSTR " body_len=%lu",
3199                    action, MAC2STR(target_ap), (unsigned long) ies_len);
3200
3201         res = ieee80211_sta_tx(wpa_s, buf, len);
3202         os_free(buf);
3203
3204         return res;
3205 }
3206
3207 #endif /* CONFIG_IEEE80211R */
3208
3209
3210 static int ieee80211_sta_set_probe_req_ie(struct wpa_supplicant *wpa_s,
3211                                           const u8 *ies, size_t ies_len)
3212 {
3213         os_free(wpa_s->mlme.extra_probe_ie);
3214         wpa_s->mlme.extra_probe_ie = NULL;
3215         wpa_s->mlme.extra_probe_ie_len = 0;
3216
3217         if (ies == NULL)
3218                 return 0;
3219
3220         wpa_s->mlme.extra_probe_ie = os_malloc(ies_len);
3221         if (wpa_s->mlme.extra_probe_ie == NULL)
3222                 return -1;
3223
3224         os_memcpy(wpa_s->mlme.extra_probe_ie, ies, ies_len);
3225         wpa_s->mlme.extra_probe_ie_len = ies_len;
3226
3227         return 0;
3228 }