wpa_supplicant/wnm_sta.c

   1 /*
   2  * wpa_supplicant - WNM
   3  * Copyright (c) 2011-2013, Qualcomm Atheros, Inc.
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  */
   8
   9 #include "utils/includes.h"
  10
  11 #include "utils/common.h"
  12 #include "common/ieee802_11_defs.h"
  13 #include "common/ieee802_11_common.h"
  14 #include "common/wpa_ctrl.h"
  15 #include "rsn_supp/wpa.h"
  16 #include "wpa_supplicant_i.h"
  17 #include "driver_i.h"
  18 #include "scan.h"
  19 #include "ctrl_iface.h"
  20 #include "bss.h"
  21 #include "wnm_sta.h"
  22 #include "hs20_supplicant.h"
  23
  24 #define MAX_TFS_IE_LEN  1024
  25 #define WNM_MAX_NEIGHBOR_REPORT 10
  26
  27
  28 /* get the TFS IE from driver */
  29 static int ieee80211_11_get_tfs_ie(struct wpa_supplicant *wpa_s, u8 *buf,
  30                                    u16 *buf_len, enum wnm_oper oper)
  31 {
  32         wpa_printf(MSG_DEBUG, "%s: TFS get operation %d", __func__, oper);
  33
  34         return wpa_drv_wnm_oper(wpa_s, oper, wpa_s->bssid, buf, buf_len);
  35 }
  36
  37
  38 /* set the TFS IE to driver */
  39 static int ieee80211_11_set_tfs_ie(struct wpa_supplicant *wpa_s,
  40                                    const u8 *addr, u8 *buf, u16 *buf_len,
  41                                    enum wnm_oper oper)
  42 {
  43         wpa_printf(MSG_DEBUG, "%s: TFS set operation %d", __func__, oper);
  44
  45         return wpa_drv_wnm_oper(wpa_s, oper, addr, buf, buf_len);
  46 }
  47
  48
  49 /* MLME-SLEEPMODE.request */
  50 int ieee802_11_send_wnmsleep_req(struct wpa_supplicant *wpa_s,
  51                                  u8 action, u16 intval, struct wpabuf *tfs_req)
  52 {
  53         struct ieee80211_mgmt *mgmt;
  54         int res;
  55         size_t len;
  56         struct wnm_sleep_element *wnmsleep_ie;
  57         u8 *wnmtfs_ie;
  58         u8 wnmsleep_ie_len;
  59         u16 wnmtfs_ie_len;  /* possibly multiple IE(s) */
  60         enum wnm_oper tfs_oper = action == 0 ? WNM_SLEEP_TFS_REQ_IE_ADD :
  61                 WNM_SLEEP_TFS_REQ_IE_NONE;
  62
  63         wpa_printf(MSG_DEBUG, "WNM: Request to send WNM-Sleep Mode Request "
  64                    "action=%s to " MACSTR,
  65                    action == 0 ? "enter" : "exit",
  66                    MAC2STR(wpa_s->bssid));
  67
  68         /* WNM-Sleep Mode IE */
  69         wnmsleep_ie_len = sizeof(struct wnm_sleep_element);
  70         wnmsleep_ie = os_zalloc(sizeof(struct wnm_sleep_element));
  71         if (wnmsleep_ie == NULL)
  72                 return -1;
  73         wnmsleep_ie->eid = WLAN_EID_WNMSLEEP;
  74         wnmsleep_ie->len = wnmsleep_ie_len - 2;
  75         wnmsleep_ie->action_type = action;
  76         wnmsleep_ie->status = WNM_STATUS_SLEEP_ACCEPT;
  77         wnmsleep_ie->intval = host_to_le16(intval);
  78         wpa_hexdump(MSG_DEBUG, "WNM: WNM-Sleep Mode element",
  79                     (u8 *) wnmsleep_ie, wnmsleep_ie_len);
  80
  81         /* TFS IE(s) */
  82         if (tfs_req) {
  83                 wnmtfs_ie_len = wpabuf_len(tfs_req);
  84                 wnmtfs_ie = os_malloc(wnmtfs_ie_len);
  85                 if (wnmtfs_ie == NULL) {
  86                         os_free(wnmsleep_ie);
  87                         return -1;
  88                 }
  89                 os_memcpy(wnmtfs_ie, wpabuf_head(tfs_req), wnmtfs_ie_len);
  90         } else {
  91                 wnmtfs_ie = os_zalloc(MAX_TFS_IE_LEN);
  92                 if (wnmtfs_ie == NULL) {
  93                         os_free(wnmsleep_ie);
  94                         return -1;
  95                 }
  96                 if (ieee80211_11_get_tfs_ie(wpa_s, wnmtfs_ie, &wnmtfs_ie_len,
  97                                             tfs_oper)) {
  98                         wnmtfs_ie_len = 0;
  99                         os_free(wnmtfs_ie);
 100                         wnmtfs_ie = NULL;
 101                 }
 102         }
 103         wpa_hexdump(MSG_DEBUG, "WNM: TFS Request element",
 104                     (u8 *) wnmtfs_ie, wnmtfs_ie_len);
 105
 106         mgmt = os_zalloc(sizeof(*mgmt) + wnmsleep_ie_len + wnmtfs_ie_len);
 107         if (mgmt == NULL) {
 108                 wpa_printf(MSG_DEBUG, "MLME: Failed to allocate buffer for "
 109                            "WNM-Sleep Request action frame");
 110                 os_free(wnmsleep_ie);
 111                 os_free(wnmtfs_ie);
 112                 return -1;
 113         }
 114
 115         os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
 116         os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
 117         os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
 118         mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 119                                            WLAN_FC_STYPE_ACTION);
 120         mgmt->u.action.category = WLAN_ACTION_WNM;
 121         mgmt->u.action.u.wnm_sleep_req.action = WNM_SLEEP_MODE_REQ;
 122         mgmt->u.action.u.wnm_sleep_req.dialogtoken = 1;
 123         os_memcpy(mgmt->u.action.u.wnm_sleep_req.variable, wnmsleep_ie,
 124                   wnmsleep_ie_len);
 125         /* copy TFS IE here */
 126         if (wnmtfs_ie_len > 0) {
 127                 os_memcpy(mgmt->u.action.u.wnm_sleep_req.variable +
 128                           wnmsleep_ie_len, wnmtfs_ie, wnmtfs_ie_len);
 129         }
 130
 131         len = 1 + sizeof(mgmt->u.action.u.wnm_sleep_req) + wnmsleep_ie_len +
 132                 wnmtfs_ie_len;
 133
 134         res = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
 135                                   wpa_s->own_addr, wpa_s->bssid,
 136                                   &mgmt->u.action.category, len, 0);
 137         if (res < 0)
 138                 wpa_printf(MSG_DEBUG, "Failed to send WNM-Sleep Request "
 139                            "(action=%d, intval=%d)", action, intval);
 140
 141         os_free(wnmsleep_ie);
 142         os_free(wnmtfs_ie);
 143         os_free(mgmt);
 144
 145         return res;
 146 }
 147
 148
 149 static void wnm_sleep_mode_enter_success(struct wpa_supplicant *wpa_s,
 150                                          u8 *tfsresp_ie_start,
 151                                          u8 *tfsresp_ie_end)
 152 {
 153         wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_ENTER_CONFIRM,
 154                          wpa_s->bssid, NULL, NULL);
 155         /* remove GTK/IGTK ?? */
 156
 157         /* set the TFS Resp IE(s) */
 158         if (tfsresp_ie_start && tfsresp_ie_end &&
 159             tfsresp_ie_end - tfsresp_ie_start >= 0) {
 160                 u16 tfsresp_ie_len;
 161                 tfsresp_ie_len = (tfsresp_ie_end + tfsresp_ie_end[1] + 2) -
 162                         tfsresp_ie_start;
 163                 wpa_printf(MSG_DEBUG, "TFS Resp IE(s) found");
 164                 /* pass the TFS Resp IE(s) to driver for processing */
 165                 if (ieee80211_11_set_tfs_ie(wpa_s, wpa_s->bssid,
 166                                             tfsresp_ie_start,
 167                                             &tfsresp_ie_len,
 168                                             WNM_SLEEP_TFS_RESP_IE_SET))
 169                         wpa_printf(MSG_DEBUG, "WNM: Fail to set TFS Resp IE");
 170         }
 171 }
 172
 173
 174 static void wnm_sleep_mode_exit_success(struct wpa_supplicant *wpa_s,
 175                                         const u8 *frm, u16 key_len_total)
 176 {
 177         u8 *ptr, *end;
 178         u8 gtk_len;
 179
 180         wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_EXIT_CONFIRM,  wpa_s->bssid,
 181                          NULL, NULL);
 182
 183         /* Install GTK/IGTK */
 184
 185         /* point to key data field */
 186         ptr = (u8 *) frm + 1 + 2;
 187         end = ptr + key_len_total;
 188         wpa_hexdump_key(MSG_DEBUG, "WNM: Key Data", ptr, key_len_total);
 189
 190         while (ptr + 1 < end) {
 191                 if (ptr + 2 + ptr[1] > end) {
 192                         wpa_printf(MSG_DEBUG, "WNM: Invalid Key Data element "
 193                                    "length");
 194                         if (end > ptr) {
 195                                 wpa_hexdump(MSG_DEBUG, "WNM: Remaining data",
 196                                             ptr, end - ptr);
 197                         }
 198                         break;
 199                 }
 200                 if (*ptr == WNM_SLEEP_SUBELEM_GTK) {
 201                         if (ptr[1] < 11 + 5) {
 202                                 wpa_printf(MSG_DEBUG, "WNM: Too short GTK "
 203                                            "subelem");
 204                                 break;
 205                         }
 206                         gtk_len = *(ptr + 4);
 207                         if (ptr[1] < 11 + gtk_len ||
 208                             gtk_len < 5 || gtk_len > 32) {
 209                                 wpa_printf(MSG_DEBUG, "WNM: Invalid GTK "
 210                                            "subelem");
 211                                 break;
 212                         }
 213                         wpa_wnmsleep_install_key(
 214                                 wpa_s->wpa,
 215                                 WNM_SLEEP_SUBELEM_GTK,
 216                                 ptr);
 217                         ptr += 13 + gtk_len;
 218 #ifdef CONFIG_IEEE80211W
 219                 } else if (*ptr == WNM_SLEEP_SUBELEM_IGTK) {
 220                         if (ptr[1] < 2 + 6 + WPA_IGTK_LEN) {
 221                                 wpa_printf(MSG_DEBUG, "WNM: Too short IGTK "
 222                                            "subelem");
 223                                 break;
 224                         }
 225                         wpa_wnmsleep_install_key(wpa_s->wpa,
 226                                                  WNM_SLEEP_SUBELEM_IGTK, ptr);
 227                         ptr += 10 + WPA_IGTK_LEN;
 228 #endif /* CONFIG_IEEE80211W */
 229                 } else
 230                         break; /* skip the loop */
 231         }
 232 }
 233
 234
 235 static void ieee802_11_rx_wnmsleep_resp(struct wpa_supplicant *wpa_s,
 236                                         const u8 *frm, int len)
 237 {
 238         /*
 239          * Action [1] | Dialog Token [1] | Key Data Len [2] | Key Data |
 240          * WNM-Sleep Mode IE | TFS Response IE
 241          */
 242         u8 *pos = (u8 *) frm; /* point to payload after the action field */
 243         u16 key_len_total;
 244         struct wnm_sleep_element *wnmsleep_ie = NULL;
 245         /* multiple TFS Resp IE (assuming consecutive) */
 246         u8 *tfsresp_ie_start = NULL;
 247         u8 *tfsresp_ie_end = NULL;
 248
 249         if (len < 3)
 250                 return;
 251         key_len_total = WPA_GET_LE16(frm + 1);
 252
 253         wpa_printf(MSG_DEBUG, "WNM-Sleep Mode Response token=%u key_len_total=%d",
 254                    frm[0], key_len_total);
 255         pos += 3 + key_len_total;
 256         if (pos > frm + len) {
 257                 wpa_printf(MSG_INFO, "WNM: Too short frame for Key Data field");
 258                 return;
 259         }
 260         while (pos - frm < len) {
 261                 u8 ie_len = *(pos + 1);
 262                 if (pos + 2 + ie_len > frm + len) {
 263                         wpa_printf(MSG_INFO, "WNM: Invalid IE len %u", ie_len);
 264                         break;
 265                 }
 266                 wpa_hexdump(MSG_DEBUG, "WNM: Element", pos, 2 + ie_len);
 267                 if (*pos == WLAN_EID_WNMSLEEP)
 268                         wnmsleep_ie = (struct wnm_sleep_element *) pos;
 269                 else if (*pos == WLAN_EID_TFS_RESP) {
 270                         if (!tfsresp_ie_start)
 271                                 tfsresp_ie_start = pos;
 272                         tfsresp_ie_end = pos;
 273                 } else
 274                         wpa_printf(MSG_DEBUG, "EID %d not recognized", *pos);
 275                 pos += ie_len + 2;
 276         }
 277
 278         if (!wnmsleep_ie) {
 279                 wpa_printf(MSG_DEBUG, "No WNM-Sleep IE found");
 280                 return;
 281         }
 282
 283         if (wnmsleep_ie->status == WNM_STATUS_SLEEP_ACCEPT ||
 284             wnmsleep_ie->status == WNM_STATUS_SLEEP_EXIT_ACCEPT_GTK_UPDATE) {
 285                 wpa_printf(MSG_DEBUG, "Successfully recv WNM-Sleep Response "
 286                            "frame (action=%d, intval=%d)",
 287                            wnmsleep_ie->action_type, wnmsleep_ie->intval);
 288                 if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_ENTER) {
 289                         wnm_sleep_mode_enter_success(wpa_s, tfsresp_ie_start,
 290                                                      tfsresp_ie_end);
 291                 } else if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT) {
 292                         wnm_sleep_mode_exit_success(wpa_s, frm, key_len_total);
 293                 }
 294         } else {
 295                 wpa_printf(MSG_DEBUG, "Reject recv WNM-Sleep Response frame "
 296                            "(action=%d, intval=%d)",
 297                            wnmsleep_ie->action_type, wnmsleep_ie->intval);
 298                 if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_ENTER)
 299                         wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_ENTER_FAIL,
 300                                          wpa_s->bssid, NULL, NULL);
 301                 else if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT)
 302                         wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_EXIT_FAIL,
 303                                          wpa_s->bssid, NULL, NULL);
 304         }
 305 }
 306
 307
 308 void wnm_deallocate_memory(struct wpa_supplicant *wpa_s)
 309 {
 310         int i;
 311
 312         for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
 313                 os_free(wpa_s->wnm_neighbor_report_elements[i].meas_pilot);
 314                 os_free(wpa_s->wnm_neighbor_report_elements[i].mul_bssid);
 315         }
 316
 317         wpa_s->wnm_num_neighbor_report = 0;
 318         os_free(wpa_s->wnm_neighbor_report_elements);
 319         wpa_s->wnm_neighbor_report_elements = NULL;
 320 }
 321
 322
 323 static void wnm_parse_neighbor_report_elem(struct neighbor_report *rep,
 324                                            u8 id, u8 elen, const u8 *pos)
 325 {
 326         switch (id) {
 327         case WNM_NEIGHBOR_TSF:
 328                 if (elen < 2 + 2) {
 329                         wpa_printf(MSG_DEBUG, "WNM: Too short TSF");
 330                         break;
 331                 }
 332                 rep->tsf_offset = WPA_GET_LE16(pos);
 333                 rep->beacon_int = WPA_GET_LE16(pos + 2);
 334                 rep->tsf_present = 1;
 335                 break;
 336         case WNM_NEIGHBOR_CONDENSED_COUNTRY_STRING:
 337                 if (elen < 2) {
 338                         wpa_printf(MSG_DEBUG, "WNM: Too short condensed "
 339                                    "country string");
 340                         break;
 341                 }
 342                 os_memcpy(rep->country, pos, 2);
 343                 rep->country_present = 1;
 344                 break;
 345         case WNM_NEIGHBOR_BSS_TRANSITION_CANDIDATE:
 346                 if (elen < 1) {
 347                         wpa_printf(MSG_DEBUG, "WNM: Too short BSS transition "
 348                                    "candidate");
 349                         break;
 350                 }
 351                 rep->preference = pos[0];
 352                 rep->preference_present = 1;
 353                 break;
 354         case WNM_NEIGHBOR_BSS_TERMINATION_DURATION:
 355                 rep->bss_term_tsf = WPA_GET_LE64(pos);
 356                 rep->bss_term_dur = WPA_GET_LE16(pos + 8);
 357                 rep->bss_term_present = 1;
 358                 break;
 359         case WNM_NEIGHBOR_BEARING:
 360                 if (elen < 8) {
 361                         wpa_printf(MSG_DEBUG, "WNM: Too short neighbor "
 362                                    "bearing");
 363                         break;
 364                 }
 365                 rep->bearing = WPA_GET_LE16(pos);
 366                 rep->distance = WPA_GET_LE32(pos + 2);
 367                 rep->rel_height = WPA_GET_LE16(pos + 2 + 4);
 368                 rep->bearing_present = 1;
 369                 break;
 370         case WNM_NEIGHBOR_MEASUREMENT_PILOT:
 371                 if (elen < 1) {
 372                         wpa_printf(MSG_DEBUG, "WNM: Too short measurement "
 373                                    "pilot");
 374                         break;
 375                 }
 376                 os_free(rep->meas_pilot);
 377                 rep->meas_pilot = os_zalloc(sizeof(struct measurement_pilot));
 378                 if (rep->meas_pilot == NULL)
 379                         break;
 380                 rep->meas_pilot->measurement_pilot = pos[0];
 381                 rep->meas_pilot->subelem_len = elen - 1;
 382                 os_memcpy(rep->meas_pilot->subelems, pos + 1, elen - 1);
 383                 break;
 384         case WNM_NEIGHBOR_RRM_ENABLED_CAPABILITIES:
 385                 if (elen < 5) {
 386                         wpa_printf(MSG_DEBUG, "WNM: Too short RRM enabled "
 387                                    "capabilities");
 388                         break;
 389                 }
 390                 os_memcpy(rep->rm_capab, pos, 5);
 391                 rep->rm_capab_present = 1;
 392                 break;
 393         case WNM_NEIGHBOR_MULTIPLE_BSSID:
 394                 if (elen < 1) {
 395                         wpa_printf(MSG_DEBUG, "WNM: Too short multiple BSSID");
 396                         break;
 397                 }
 398                 os_free(rep->mul_bssid);
 399                 rep->mul_bssid = os_zalloc(sizeof(struct multiple_bssid));
 400                 if (rep->mul_bssid == NULL)
 401                         break;
 402                 rep->mul_bssid->max_bssid_indicator = pos[0];
 403                 rep->mul_bssid->subelem_len = elen - 1;
 404                 os_memcpy(rep->mul_bssid->subelems, pos + 1, elen - 1);
 405                 break;
 406         }
 407 }
 408
 409
 410 static int wnm_nei_get_chan(struct wpa_supplicant *wpa_s, u8 op_class, u8 chan)
 411 {
 412         return ieee80211_chan_to_freq(NULL, op_class, chan);
 413 }
 414
 415
 416 static void wnm_parse_neighbor_report(struct wpa_supplicant *wpa_s,
 417                                       const u8 *pos, u8 len,
 418                                       struct neighbor_report *rep)
 419 {
 420         u8 left = len;
 421
 422         if (left < 13) {
 423                 wpa_printf(MSG_DEBUG, "WNM: Too short neighbor report");
 424                 return;
 425         }
 426
 427         os_memcpy(rep->bssid, pos, ETH_ALEN);
 428         rep->bssid_info = WPA_GET_LE32(pos + ETH_ALEN);
 429         rep->regulatory_class = *(pos + 10);
 430         rep->channel_number = *(pos + 11);
 431         rep->phy_type = *(pos + 12);
 432
 433         pos += 13;
 434         left -= 13;
 435
 436         while (left >= 2) {
 437                 u8 id, elen;
 438
 439                 id = *pos++;
 440                 elen = *pos++;
 441                 wpa_printf(MSG_DEBUG, "WNM: Subelement id=%u len=%u", id, elen);
 442                 left -= 2;
 443                 if (elen > left) {
 444                         wpa_printf(MSG_DEBUG,
 445                                    "WNM: Truncated neighbor report subelement");
 446                         break;
 447                 }
 448                 wnm_parse_neighbor_report_elem(rep, id, elen, pos);
 449                 left -= elen;
 450                 pos += elen;
 451         }
 452
 453         rep->freq = wnm_nei_get_chan(wpa_s, rep->regulatory_class,
 454                                      rep->channel_number);
 455 }
 456
 457
 458 static struct wpa_bss *
 459 compare_scan_neighbor_results(struct wpa_supplicant *wpa_s)
 460 {
 461
 462         u8 i;
 463         struct wpa_bss *bss = wpa_s->current_bss;
 464         struct wpa_bss *target;
 465
 466         if (!bss)
 467                 return 0;
 468
 469         wpa_printf(MSG_DEBUG, "WNM: Current BSS " MACSTR " RSSI %d",
 470                    MAC2STR(wpa_s->bssid), bss->level);
 471
 472         for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
 473                 struct neighbor_report *nei;
 474
 475                 nei = &wpa_s->wnm_neighbor_report_elements[i];
 476                 if (nei->preference_present && nei->preference == 0) {
 477                         wpa_printf(MSG_DEBUG, "Skip excluded BSS " MACSTR,
 478                                    MAC2STR(nei->bssid));
 479                         continue;
 480                 }
 481
 482                 target = wpa_bss_get_bssid(wpa_s, nei->bssid);
 483                 if (!target) {
 484                         wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
 485                                    " (pref %d) not found in scan results",
 486                                    MAC2STR(nei->bssid),
 487                                    nei->preference_present ? nei->preference :
 488                                    -1);
 489                         continue;
 490                 }
 491
 492                 if (bss->ssid_len != target->ssid_len ||
 493                     os_memcmp(bss->ssid, target->ssid, bss->ssid_len) != 0) {
 494                         /*
 495                          * TODO: Could consider allowing transition to another
 496                          * ESS if PMF was enabled for the association.
 497                          */
 498                         wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
 499                                    " (pref %d) in different ESS",
 500                                    MAC2STR(nei->bssid),
 501                                    nei->preference_present ? nei->preference :
 502                                    -1);
 503                         continue;
 504                 }
 505
 506                 if (target->level < bss->level && target->level < -80) {
 507                         wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
 508                                    " (pref %d) does not have sufficient signal level (%d)",
 509                                    MAC2STR(nei->bssid),
 510                                    nei->preference_present ? nei->preference :
 511                                    -1,
 512                                    target->level);
 513                         continue;
 514                 }
 515
 516                 wpa_printf(MSG_DEBUG,
 517                            "WNM: Found an acceptable preferred transition candidate BSS "
 518                            MACSTR " (RSSI %d)",
 519                            MAC2STR(nei->bssid), target->level);
 520                 return target;
 521         }
 522
 523         return NULL;
 524 }
 525
 526
 527 static void wnm_send_bss_transition_mgmt_resp(
 528         struct wpa_supplicant *wpa_s, u8 dialog_token,
 529         enum bss_trans_mgmt_status_code status, u8 delay,
 530         const u8 *target_bssid)
 531 {
 532         u8 buf[1000], *pos;
 533         struct ieee80211_mgmt *mgmt;
 534         size_t len;
 535         int res;
 536
 537         wpa_printf(MSG_DEBUG, "WNM: Send BSS Transition Management Response "
 538                    "to " MACSTR " dialog_token=%u status=%u delay=%d",
 539                    MAC2STR(wpa_s->bssid), dialog_token, status, delay);
 540         if (!wpa_s->current_bss) {
 541                 wpa_printf(MSG_DEBUG,
 542                            "WNM: Current BSS not known - drop response");
 543                 return;
 544         }
 545
 546         mgmt = (struct ieee80211_mgmt *) buf;
 547         os_memset(&buf, 0, sizeof(buf));
 548         os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
 549         os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
 550         os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
 551         mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 552                                            WLAN_FC_STYPE_ACTION);
 553         mgmt->u.action.category = WLAN_ACTION_WNM;
 554         mgmt->u.action.u.bss_tm_resp.action = WNM_BSS_TRANS_MGMT_RESP;
 555         mgmt->u.action.u.bss_tm_resp.dialog_token = dialog_token;
 556         mgmt->u.action.u.bss_tm_resp.status_code = status;
 557         mgmt->u.action.u.bss_tm_resp.bss_termination_delay = delay;
 558         pos = mgmt->u.action.u.bss_tm_resp.variable;
 559         if (target_bssid) {
 560                 os_memcpy(pos, target_bssid, ETH_ALEN);
 561                 pos += ETH_ALEN;
 562         } else if (status == WNM_BSS_TM_ACCEPT) {
 563                 /*
 564                  * P802.11-REVmc clarifies that the Target BSSID field is always
 565                  * present when status code is zero, so use a fake value here if
 566                  * no BSSID is yet known.
 567                  */
 568                 os_memset(pos, 0, ETH_ALEN);
 569                 pos += ETH_ALEN;
 570         }
 571
 572         len = pos - (u8 *) &mgmt->u.action.category;
 573
 574         res = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
 575                                   wpa_s->own_addr, wpa_s->bssid,
 576                                   &mgmt->u.action.category, len, 0);
 577         if (res < 0) {
 578                 wpa_printf(MSG_DEBUG,
 579                            "WNM: Failed to send BSS Transition Management Response");
 580         }
 581 }
 582
 583
 584 int wnm_scan_process(struct wpa_supplicant *wpa_s, int reply_on_fail)
 585 {
 586         struct wpa_bss *bss;
 587         struct wpa_ssid *ssid = wpa_s->current_ssid;
 588         enum bss_trans_mgmt_status_code status = WNM_BSS_TM_REJECT_UNSPECIFIED;
 589
 590         if (!wpa_s->wnm_neighbor_report_elements)
 591                 return 0;
 592
 593         if (os_reltime_before(&wpa_s->wnm_cand_valid_until,
 594                               &wpa_s->scan_trigger_time)) {
 595                 wpa_printf(MSG_DEBUG, "WNM: Previously stored BSS transition candidate list is not valid anymore - drop it");
 596                 wnm_deallocate_memory(wpa_s);
 597                 return 0;
 598         }
 599
 600         if (!wpa_s->current_bss ||
 601             os_memcmp(wpa_s->wnm_cand_from_bss, wpa_s->current_bss->bssid,
 602                       ETH_ALEN) != 0) {
 603                 wpa_printf(MSG_DEBUG, "WNM: Stored BSS transition candidate list not from the current BSS - ignore it");
 604                 return 0;
 605         }
 606
 607         /* Compare the Neighbor Report and scan results */
 608         bss = compare_scan_neighbor_results(wpa_s);
 609         if (!bss) {
 610                 wpa_printf(MSG_DEBUG, "WNM: No BSS transition candidate match found");
 611                 status = WNM_BSS_TM_REJECT_NO_SUITABLE_CANDIDATES;
 612                 goto send_bss_resp_fail;
 613         }
 614
 615         /* Associate to the network */
 616         /* Send the BSS Management Response - Accept */
 617         if (wpa_s->wnm_reply) {
 618                 wpa_s->wnm_reply = 0;
 619                 wnm_send_bss_transition_mgmt_resp(wpa_s,
 620                                                   wpa_s->wnm_dialog_token,
 621                                                   WNM_BSS_TM_ACCEPT,
 622                                                   0, bss->bssid);
 623         }
 624
 625         if (bss == wpa_s->current_bss) {
 626                 wpa_printf(MSG_DEBUG,
 627                            "WNM: Already associated with the preferred candidate");
 628                 return 1;
 629         }
 630
 631         wpa_s->reassociate = 1;
 632         wpa_supplicant_connect(wpa_s, bss, ssid);
 633         wnm_deallocate_memory(wpa_s);
 634         return 1;
 635
 636 send_bss_resp_fail:
 637         if (!reply_on_fail)
 638                 return 0;
 639
 640         /* Send reject response for all the failures */
 641
 642         if (wpa_s->wnm_reply) {
 643                 wpa_s->wnm_reply = 0;
 644                 wnm_send_bss_transition_mgmt_resp(wpa_s,
 645                                                   wpa_s->wnm_dialog_token,
 646                                                   status, 0, NULL);
 647         }
 648         wnm_deallocate_memory(wpa_s);
 649
 650         return 0;
 651 }
 652
 653
 654 static int cand_pref_compar(const void *a, const void *b)
 655 {
 656         const struct neighbor_report *aa = a;
 657         const struct neighbor_report *bb = b;
 658
 659         if (!aa->preference_present && !bb->preference_present)
 660                 return 0;
 661         if (!aa->preference_present)
 662                 return 1;
 663         if (!bb->preference_present)
 664                 return -1;
 665         if (bb->preference > aa->preference)
 666                 return 1;
 667         if (bb->preference < aa->preference)
 668                 return -1;
 669         return 0;
 670 }
 671
 672
 673 static void wnm_sort_cand_list(struct wpa_supplicant *wpa_s)
 674 {
 675         if (!wpa_s->wnm_neighbor_report_elements)
 676                 return;
 677         qsort(wpa_s->wnm_neighbor_report_elements,
 678               wpa_s->wnm_num_neighbor_report, sizeof(struct neighbor_report),
 679               cand_pref_compar);
 680 }
 681
 682
 683 static void wnm_dump_cand_list(struct wpa_supplicant *wpa_s)
 684 {
 685         unsigned int i;
 686
 687         wpa_printf(MSG_DEBUG, "WNM: BSS Transition Candidate List");
 688         if (!wpa_s->wnm_neighbor_report_elements)
 689                 return;
 690         for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
 691                 struct neighbor_report *nei;
 692
 693                 nei = &wpa_s->wnm_neighbor_report_elements[i];
 694                 wpa_printf(MSG_DEBUG, "%u: " MACSTR
 695                            " info=0x%x op_class=%u chan=%u phy=%u pref=%d freq=%d",
 696                            i, MAC2STR(nei->bssid), nei->bssid_info,
 697                            nei->regulatory_class,
 698                            nei->channel_number, nei->phy_type,
 699                            nei->preference_present ? nei->preference : -1,
 700                            nei->freq);
 701         }
 702 }
 703
 704
 705 static int chan_supported(struct wpa_supplicant *wpa_s, int freq)
 706 {
 707         unsigned int i;
 708
 709         for (i = 0; i < wpa_s->hw.num_modes; i++) {
 710                 struct hostapd_hw_modes *mode = &wpa_s->hw.modes[i];
 711                 int j;
 712
 713                 for (j = 0; j < mode->num_channels; j++) {
 714                         struct hostapd_channel_data *chan;
 715
 716                         chan = &mode->channels[j];
 717                         if (chan->freq == freq &&
 718                             !(chan->flag & HOSTAPD_CHAN_DISABLED))
 719                                 return 1;
 720                 }
 721         }
 722
 723         return 0;
 724 }
 725
 726
 727 static void wnm_set_scan_freqs(struct wpa_supplicant *wpa_s)
 728 {
 729         int *freqs;
 730         int num_freqs = 0;
 731         unsigned int i;
 732
 733         if (!wpa_s->wnm_neighbor_report_elements)
 734                 return;
 735
 736         if (wpa_s->hw.modes == NULL)
 737                 return;
 738
 739         os_free(wpa_s->next_scan_freqs);
 740         wpa_s->next_scan_freqs = NULL;
 741
 742         freqs = os_calloc(wpa_s->wnm_num_neighbor_report + 1, sizeof(int));
 743         if (freqs == NULL)
 744                 return;
 745
 746         for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
 747                 struct neighbor_report *nei;
 748
 749                 nei = &wpa_s->wnm_neighbor_report_elements[i];
 750                 if (nei->freq <= 0) {
 751                         wpa_printf(MSG_DEBUG,
 752                                    "WNM: Unknown neighbor operating frequency for "
 753                                    MACSTR " - scan all channels",
 754                                    MAC2STR(nei->bssid));
 755                         os_free(freqs);
 756                         return;
 757                 }
 758                 if (chan_supported(wpa_s, nei->freq))
 759                         add_freq(freqs, &num_freqs, nei->freq);
 760         }
 761
 762         if (num_freqs == 0) {
 763                 os_free(freqs);
 764                 return;
 765         }
 766
 767         wpa_printf(MSG_DEBUG,
 768                    "WNM: Scan %d frequencies based on transition candidate list",
 769                    num_freqs);
 770         wpa_s->next_scan_freqs = freqs;
 771 }
 772
 773
 774 static void ieee802_11_rx_bss_trans_mgmt_req(struct wpa_supplicant *wpa_s,
 775                                              const u8 *pos, const u8 *end,
 776                                              int reply)
 777 {
 778         unsigned int beacon_int;
 779         u8 valid_int;
 780
 781         if (pos + 5 > end)
 782                 return;
 783
 784         if (wpa_s->current_bss)
 785                 beacon_int = wpa_s->current_bss->beacon_int;
 786         else
 787                 beacon_int = 100; /* best guess */
 788
 789         wpa_s->wnm_dialog_token = pos[0];
 790         wpa_s->wnm_mode = pos[1];
 791         wpa_s->wnm_dissoc_timer = WPA_GET_LE16(pos + 2);
 792         valid_int = pos[4];
 793         wpa_s->wnm_reply = reply;
 794
 795         wpa_printf(MSG_DEBUG, "WNM: BSS Transition Management Request: "
 796                    "dialog_token=%u request_mode=0x%x "
 797                    "disassoc_timer=%u validity_interval=%u",
 798                    wpa_s->wnm_dialog_token, wpa_s->wnm_mode,
 799                    wpa_s->wnm_dissoc_timer, valid_int);
 800
 801         pos += 5;
 802
 803         if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_BSS_TERMINATION_INCLUDED) {
 804                 if (pos + 12 > end) {
 805                         wpa_printf(MSG_DEBUG, "WNM: Too short BSS TM Request");
 806                         return;
 807                 }
 808                 os_memcpy(wpa_s->wnm_bss_termination_duration, pos, 12);
 809                 pos += 12; /* BSS Termination Duration */
 810         }
 811
 812         if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_ESS_DISASSOC_IMMINENT) {
 813                 char url[256];
 814
 815                 if (pos + 1 > end || pos + 1 + pos[0] > end) {
 816                         wpa_printf(MSG_DEBUG, "WNM: Invalid BSS Transition "
 817                                    "Management Request (URL)");
 818                         return;
 819                 }
 820                 os_memcpy(url, pos + 1, pos[0]);
 821                 url[pos[0]] = '\0';
 822                 pos += 1 + pos[0];
 823
 824                 wpa_msg(wpa_s, MSG_INFO, ESS_DISASSOC_IMMINENT "%d %u %s",
 825                         wpa_sm_pmf_enabled(wpa_s->wpa),
 826                         wpa_s->wnm_dissoc_timer * beacon_int * 128 / 125, url);
 827         }
 828
 829         if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_DISASSOC_IMMINENT) {
 830                 wpa_msg(wpa_s, MSG_INFO, "WNM: Disassociation Imminent - "
 831                         "Disassociation Timer %u", wpa_s->wnm_dissoc_timer);
 832                 if (wpa_s->wnm_dissoc_timer && !wpa_s->scanning) {
 833                         /* TODO: mark current BSS less preferred for
 834                          * selection */
 835                         wpa_printf(MSG_DEBUG, "Trying to find another BSS");
 836                         wpa_supplicant_req_scan(wpa_s, 0, 0);
 837                 }
 838         }
 839
 840         if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_PREF_CAND_LIST_INCLUDED) {
 841                 unsigned int valid_ms;
 842
 843                 wpa_msg(wpa_s, MSG_INFO, "WNM: Preferred List Available");
 844                 wnm_deallocate_memory(wpa_s);
 845                 wpa_s->wnm_neighbor_report_elements = os_zalloc(
 846                         WNM_MAX_NEIGHBOR_REPORT *
 847                         sizeof(struct neighbor_report));
 848                 if (wpa_s->wnm_neighbor_report_elements == NULL)
 849                         return;
 850
 851                 while (pos + 2 <= end &&
 852                        wpa_s->wnm_num_neighbor_report < WNM_MAX_NEIGHBOR_REPORT)
 853                 {
 854                         u8 tag = *pos++;
 855                         u8 len = *pos++;
 856
 857                         wpa_printf(MSG_DEBUG, "WNM: Neighbor report tag %u",
 858                                    tag);
 859                         if (pos + len > end) {
 860                                 wpa_printf(MSG_DEBUG, "WNM: Truncated request");
 861                                 return;
 862                         }
 863                         if (tag == WLAN_EID_NEIGHBOR_REPORT) {
 864                                 struct neighbor_report *rep;
 865                                 rep = &wpa_s->wnm_neighbor_report_elements[
 866                                         wpa_s->wnm_num_neighbor_report];
 867                                 wnm_parse_neighbor_report(wpa_s, pos, len, rep);
 868                         }
 869
 870                         pos += len;
 871                         wpa_s->wnm_num_neighbor_report++;
 872                 }
 873                 wnm_sort_cand_list(wpa_s);
 874                 wnm_dump_cand_list(wpa_s);
 875                 valid_ms = valid_int * beacon_int * 128 / 125;
 876                 wpa_printf(MSG_DEBUG, "WNM: Candidate list valid for %u ms",
 877                            valid_ms);
 878                 os_get_reltime(&wpa_s->wnm_cand_valid_until);
 879                 wpa_s->wnm_cand_valid_until.sec += valid_ms / 1000;
 880                 wpa_s->wnm_cand_valid_until.usec += (valid_ms % 1000) * 1000;
 881                 wpa_s->wnm_cand_valid_until.sec +=
 882                         wpa_s->wnm_cand_valid_until.usec / 1000000;
 883                 wpa_s->wnm_cand_valid_until.usec %= 1000000;
 884                 os_memcpy(wpa_s->wnm_cand_from_bss, wpa_s->bssid, ETH_ALEN);
 885
 886                 if (wpa_s->last_scan_res_used > 0) {
 887                         struct os_reltime now;
 888
 889                         os_get_reltime(&now);
 890                         if (!os_reltime_expired(&now, &wpa_s->last_scan, 10)) {
 891                                 wpa_printf(MSG_DEBUG,
 892                                            "WNM: Try to use recent scan results");
 893                                 if (wnm_scan_process(wpa_s, 0) > 0)
 894                                         return;
 895                                 wpa_printf(MSG_DEBUG,
 896                                            "WNM: No match in previous scan results - try a new scan");
 897                         }
 898                 }
 899
 900                 wnm_set_scan_freqs(wpa_s);
 901                 wpa_supplicant_req_scan(wpa_s, 0, 0);
 902         } else if (reply) {
 903                 enum bss_trans_mgmt_status_code status;
 904                 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_ESS_DISASSOC_IMMINENT)
 905                         status = WNM_BSS_TM_ACCEPT;
 906                 else {
 907                         wpa_msg(wpa_s, MSG_INFO, "WNM: BSS Transition Management Request did not include candidates");
 908                         status = WNM_BSS_TM_REJECT_UNSPECIFIED;
 909                 }
 910                 wnm_send_bss_transition_mgmt_resp(wpa_s,
 911                                                   wpa_s->wnm_dialog_token,
 912                                                   status, 0, NULL);
 913         }
 914 }
 915
 916
 917 int wnm_send_bss_transition_mgmt_query(struct wpa_supplicant *wpa_s,
 918                                        u8 query_reason)
 919 {
 920         u8 buf[1000], *pos;
 921         struct ieee80211_mgmt *mgmt;
 922         size_t len;
 923         int ret;
 924
 925         wpa_printf(MSG_DEBUG, "WNM: Send BSS Transition Management Query to "
 926                    MACSTR " query_reason=%u",
 927                    MAC2STR(wpa_s->bssid), query_reason);
 928
 929         mgmt = (struct ieee80211_mgmt *) buf;
 930         os_memset(&buf, 0, sizeof(buf));
 931         os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
 932         os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
 933         os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
 934         mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 935                                            WLAN_FC_STYPE_ACTION);
 936         mgmt->u.action.category = WLAN_ACTION_WNM;
 937         mgmt->u.action.u.bss_tm_query.action = WNM_BSS_TRANS_MGMT_QUERY;
 938         mgmt->u.action.u.bss_tm_query.dialog_token = 1;
 939         mgmt->u.action.u.bss_tm_query.query_reason = query_reason;
 940         pos = mgmt->u.action.u.bss_tm_query.variable;
 941
 942         len = pos - (u8 *) &mgmt->u.action.category;
 943
 944         ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
 945                                   wpa_s->own_addr, wpa_s->bssid,
 946                                   &mgmt->u.action.category, len, 0);
 947
 948         return ret;
 949 }
 950
 951
 952 static void ieee802_11_rx_wnm_notif_req_wfa(struct wpa_supplicant *wpa_s,
 953                                             const u8 *sa, const u8 *data,
 954                                             int len)
 955 {
 956         const u8 *pos, *end, *next;
 957         u8 ie, ie_len;
 958
 959         pos = data;
 960         end = data + len;
 961
 962         while (pos + 1 < end) {
 963                 ie = *pos++;
 964                 ie_len = *pos++;
 965                 wpa_printf(MSG_DEBUG, "WNM: WFA subelement %u len %u",
 966                            ie, ie_len);
 967                 if (ie_len > end - pos) {
 968                         wpa_printf(MSG_DEBUG, "WNM: Not enough room for "
 969                                    "subelement");
 970                         break;
 971                 }
 972                 next = pos + ie_len;
 973                 if (ie_len < 4) {
 974                         pos = next;
 975                         continue;
 976                 }
 977                 wpa_printf(MSG_DEBUG, "WNM: Subelement OUI %06x type %u",
 978                            WPA_GET_BE24(pos), pos[3]);
 979
 980 #ifdef CONFIG_HS20
 981                 if (ie == WLAN_EID_VENDOR_SPECIFIC && ie_len >= 5 &&
 982                     WPA_GET_BE24(pos) == OUI_WFA &&
 983                     pos[3] == HS20_WNM_SUB_REM_NEEDED) {
 984                         /* Subscription Remediation subelement */
 985                         const u8 *ie_end;
 986                         u8 url_len;
 987                         char *url;
 988                         u8 osu_method;
 989
 990                         wpa_printf(MSG_DEBUG, "WNM: Subscription Remediation "
 991                                    "subelement");
 992                         ie_end = pos + ie_len;
 993                         pos += 4;
 994                         url_len = *pos++;
 995                         if (url_len == 0) {
 996                                 wpa_printf(MSG_DEBUG, "WNM: No Server URL included");
 997                                 url = NULL;
 998                                 osu_method = 1;
 999                         } else {
1000                                 if (pos + url_len + 1 > ie_end) {
1001                                         wpa_printf(MSG_DEBUG, "WNM: Not enough room for Server URL (len=%u) and Server Method (left %d)",
1002                                                    url_len,
1003                                                    (int) (ie_end - pos));
1004                                         break;
1005                                 }
1006                                 url = os_malloc(url_len + 1);
1007                                 if (url == NULL)
1008                                         break;
1009                                 os_memcpy(url, pos, url_len);
1010                                 url[url_len] = '\0';
1011                                 osu_method = pos[url_len];
1012                         }
1013                         hs20_rx_subscription_remediation(wpa_s, url,
1014                                                          osu_method);
1015                         os_free(url);
1016                         pos = next;
1017                         continue;
1018                 }
1019
1020                 if (ie == WLAN_EID_VENDOR_SPECIFIC && ie_len >= 8 &&
1021                     WPA_GET_BE24(pos) == OUI_WFA &&
1022                     pos[3] == HS20_WNM_DEAUTH_IMMINENT_NOTICE) {
1023                         const u8 *ie_end;
1024                         u8 url_len;
1025                         char *url;
1026                         u8 code;
1027                         u16 reauth_delay;
1028
1029                         ie_end = pos + ie_len;
1030                         pos += 4;
1031                         code = *pos++;
1032                         reauth_delay = WPA_GET_LE16(pos);
1033                         pos += 2;
1034                         url_len = *pos++;
1035                         wpa_printf(MSG_DEBUG, "WNM: HS 2.0 Deauthentication "
1036                                    "Imminent - Reason Code %u   "
1037                                    "Re-Auth Delay %u  URL Length %u",
1038                                    code, reauth_delay, url_len);
1039                         if (pos + url_len > ie_end)
1040                                 break;
1041                         url = os_malloc(url_len + 1);
1042                         if (url == NULL)
1043                                 break;
1044                         os_memcpy(url, pos, url_len);
1045                         url[url_len] = '\0';
1046                         hs20_rx_deauth_imminent_notice(wpa_s, code,
1047                                                        reauth_delay, url);
1048                         os_free(url);
1049                         pos = next;
1050                         continue;
1051                 }
1052 #endif /* CONFIG_HS20 */
1053
1054                 pos = next;
1055         }
1056 }
1057
1058
1059 static void ieee802_11_rx_wnm_notif_req(struct wpa_supplicant *wpa_s,
1060                                         const u8 *sa, const u8 *frm, int len)
1061 {
1062         const u8 *pos, *end;
1063         u8 dialog_token, type;
1064
1065         /* Dialog Token [1] | Type [1] | Subelements */
1066
1067         if (len < 2 || sa == NULL)
1068                 return;
1069         end = frm + len;
1070         pos = frm;
1071         dialog_token = *pos++;
1072         type = *pos++;
1073
1074         wpa_dbg(wpa_s, MSG_DEBUG, "WNM: Received WNM-Notification Request "
1075                 "(dialog_token %u type %u sa " MACSTR ")",
1076                 dialog_token, type, MAC2STR(sa));
1077         wpa_hexdump(MSG_DEBUG, "WNM-Notification Request subelements",
1078                     pos, end - pos);
1079
1080         if (wpa_s->wpa_state != WPA_COMPLETED ||
1081             os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0) {
1082                 wpa_dbg(wpa_s, MSG_DEBUG, "WNM: WNM-Notification frame not "
1083                         "from our AP - ignore it");
1084                 return;
1085         }
1086
1087         switch (type) {
1088         case 1:
1089                 ieee802_11_rx_wnm_notif_req_wfa(wpa_s, sa, pos, end - pos);
1090                 break;
1091         default:
1092                 wpa_dbg(wpa_s, MSG_DEBUG, "WNM: Ignore unknown "
1093                         "WNM-Notification type %u", type);
1094                 break;
1095         }
1096 }
1097
1098
1099 void ieee802_11_rx_wnm_action(struct wpa_supplicant *wpa_s,
1100                               const struct ieee80211_mgmt *mgmt, size_t len)
1101 {
1102         const u8 *pos, *end;
1103         u8 act;
1104
1105         if (len < IEEE80211_HDRLEN + 2)
1106                 return;
1107
1108         pos = ((const u8 *) mgmt) + IEEE80211_HDRLEN + 1;
1109         act = *pos++;
1110         end = ((const u8 *) mgmt) + len;
1111
1112         wpa_printf(MSG_DEBUG, "WNM: RX action %u from " MACSTR,
1113                    act, MAC2STR(mgmt->sa));
1114         if (wpa_s->wpa_state < WPA_ASSOCIATED ||
1115             os_memcmp(mgmt->sa, wpa_s->bssid, ETH_ALEN) != 0) {
1116                 wpa_printf(MSG_DEBUG, "WNM: Ignore unexpected WNM Action "
1117                            "frame");
1118                 return;
1119         }
1120
1121         switch (act) {
1122         case WNM_BSS_TRANS_MGMT_REQ:
1123                 ieee802_11_rx_bss_trans_mgmt_req(wpa_s, pos, end,
1124                                                  !(mgmt->da[0] & 0x01));
1125                 break;
1126         case WNM_SLEEP_MODE_RESP:
1127                 ieee802_11_rx_wnmsleep_resp(wpa_s, pos, end - pos);
1128                 break;
1129         case WNM_NOTIFICATION_REQ:
1130                 ieee802_11_rx_wnm_notif_req(wpa_s, mgmt->sa, pos, end - pos);
1131                 break;
1132         default:
1133                 wpa_printf(MSG_ERROR, "WNM: Unknown request");
1134                 break;
1135         }
1136 }