contrib/wpa/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 "common/ocv.h"
  16 #include "rsn_supp/wpa.h"
  17 #include "config.h"
  18 #include "wpa_supplicant_i.h"
  19 #include "driver_i.h"
  20 #include "scan.h"
  21 #include "ctrl_iface.h"
  22 #include "bss.h"
  23 #include "wnm_sta.h"
  24 #include "notify.h"
  25 #include "hs20_supplicant.h"
  26
  27 #define MAX_TFS_IE_LEN  1024
  28 #define WNM_MAX_NEIGHBOR_REPORT 10
  29
  30 #define WNM_SCAN_RESULT_AGE 2 /* 2 seconds */
  31
  32 /* get the TFS IE from driver */
  33 static int ieee80211_11_get_tfs_ie(struct wpa_supplicant *wpa_s, u8 *buf,
  34                                    u16 *buf_len, enum wnm_oper oper)
  35 {
  36         wpa_printf(MSG_DEBUG, "%s: TFS get operation %d", __func__, oper);
  37
  38         return wpa_drv_wnm_oper(wpa_s, oper, wpa_s->bssid, buf, buf_len);
  39 }
  40
  41
  42 /* set the TFS IE to driver */
  43 static int ieee80211_11_set_tfs_ie(struct wpa_supplicant *wpa_s,
  44                                    const u8 *addr, const u8 *buf, u16 buf_len,
  45                                    enum wnm_oper oper)
  46 {
  47         u16 len = buf_len;
  48
  49         wpa_printf(MSG_DEBUG, "%s: TFS set operation %d", __func__, oper);
  50
  51         return wpa_drv_wnm_oper(wpa_s, oper, addr, (u8 *) buf, &len);
  52 }
  53
  54
  55 /* MLME-SLEEPMODE.request */
  56 int ieee802_11_send_wnmsleep_req(struct wpa_supplicant *wpa_s,
  57                                  u8 action, u16 intval, struct wpabuf *tfs_req)
  58 {
  59         struct ieee80211_mgmt *mgmt;
  60         int res;
  61         size_t len;
  62         struct wnm_sleep_element *wnmsleep_ie;
  63         u8 *wnmtfs_ie, *oci_ie;
  64         u8 wnmsleep_ie_len, oci_ie_len;
  65         u16 wnmtfs_ie_len;  /* possibly multiple IE(s) */
  66         enum wnm_oper tfs_oper = action == 0 ? WNM_SLEEP_TFS_REQ_IE_ADD :
  67                 WNM_SLEEP_TFS_REQ_IE_NONE;
  68
  69         wpa_printf(MSG_DEBUG, "WNM: Request to send WNM-Sleep Mode Request "
  70                    "action=%s to " MACSTR,
  71                    action == 0 ? "enter" : "exit",
  72                    MAC2STR(wpa_s->bssid));
  73
  74         /* WNM-Sleep Mode IE */
  75         wnmsleep_ie_len = sizeof(struct wnm_sleep_element);
  76         wnmsleep_ie = os_zalloc(sizeof(struct wnm_sleep_element));
  77         if (wnmsleep_ie == NULL)
  78                 return -1;
  79         wnmsleep_ie->eid = WLAN_EID_WNMSLEEP;
  80         wnmsleep_ie->len = wnmsleep_ie_len - 2;
  81         wnmsleep_ie->action_type = action;
  82         wnmsleep_ie->status = WNM_STATUS_SLEEP_ACCEPT;
  83         wnmsleep_ie->intval = host_to_le16(intval);
  84         wpa_hexdump(MSG_DEBUG, "WNM: WNM-Sleep Mode element",
  85                     (u8 *) wnmsleep_ie, wnmsleep_ie_len);
  86
  87         /* TFS IE(s) */
  88         if (tfs_req) {
  89                 wnmtfs_ie_len = wpabuf_len(tfs_req);
  90                 wnmtfs_ie = os_memdup(wpabuf_head(tfs_req), wnmtfs_ie_len);
  91                 if (wnmtfs_ie == NULL) {
  92                         os_free(wnmsleep_ie);
  93                         return -1;
  94                 }
  95         } else {
  96                 wnmtfs_ie = os_zalloc(MAX_TFS_IE_LEN);
  97                 if (wnmtfs_ie == NULL) {
  98                         os_free(wnmsleep_ie);
  99                         return -1;
 100                 }
 101                 if (ieee80211_11_get_tfs_ie(wpa_s, wnmtfs_ie, &wnmtfs_ie_len,
 102                                             tfs_oper)) {
 103                         wnmtfs_ie_len = 0;
 104                         os_free(wnmtfs_ie);
 105                         wnmtfs_ie = NULL;
 106                 }
 107         }
 108         wpa_hexdump(MSG_DEBUG, "WNM: TFS Request element",
 109                     (u8 *) wnmtfs_ie, wnmtfs_ie_len);
 110
 111         oci_ie = NULL;
 112         oci_ie_len = 0;
 113 #ifdef CONFIG_OCV
 114         if (action == WNM_SLEEP_MODE_EXIT && wpa_sm_ocv_enabled(wpa_s->wpa)) {
 115                 struct wpa_channel_info ci;
 116
 117                 if (wpa_drv_channel_info(wpa_s, &ci) != 0) {
 118                         wpa_printf(MSG_WARNING,
 119                                    "Failed to get channel info for OCI element in WNM-Sleep Mode frame");
 120                         os_free(wnmsleep_ie);
 121                         os_free(wnmtfs_ie);
 122                         return -1;
 123                 }
 124
 125                 oci_ie_len = OCV_OCI_EXTENDED_LEN;
 126                 oci_ie = os_zalloc(oci_ie_len);
 127                 if (!oci_ie) {
 128                         wpa_printf(MSG_WARNING,
 129                                    "Failed to allocate buffer for for OCI element in WNM-Sleep Mode frame");
 130                         os_free(wnmsleep_ie);
 131                         os_free(wnmtfs_ie);
 132                         return -1;
 133                 }
 134
 135                 if (ocv_insert_extended_oci(&ci, oci_ie) < 0) {
 136                         os_free(wnmsleep_ie);
 137                         os_free(wnmtfs_ie);
 138                         os_free(oci_ie);
 139                         return -1;
 140                 }
 141         }
 142 #endif /* CONFIG_OCV */
 143
 144         mgmt = os_zalloc(sizeof(*mgmt) + wnmsleep_ie_len + wnmtfs_ie_len +
 145                          oci_ie_len);
 146         if (mgmt == NULL) {
 147                 wpa_printf(MSG_DEBUG, "MLME: Failed to allocate buffer for "
 148                            "WNM-Sleep Request action frame");
 149                 os_free(wnmsleep_ie);
 150                 os_free(wnmtfs_ie);
 151                 return -1;
 152         }
 153
 154         os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
 155         os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
 156         os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
 157         mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 158                                            WLAN_FC_STYPE_ACTION);
 159         mgmt->u.action.category = WLAN_ACTION_WNM;
 160         mgmt->u.action.u.wnm_sleep_req.action = WNM_SLEEP_MODE_REQ;
 161         mgmt->u.action.u.wnm_sleep_req.dialogtoken = 1;
 162         os_memcpy(mgmt->u.action.u.wnm_sleep_req.variable, wnmsleep_ie,
 163                   wnmsleep_ie_len);
 164         /* copy TFS IE here */
 165         if (wnmtfs_ie_len > 0) {
 166                 os_memcpy(mgmt->u.action.u.wnm_sleep_req.variable +
 167                           wnmsleep_ie_len, wnmtfs_ie, wnmtfs_ie_len);
 168         }
 169
 170 #ifdef CONFIG_OCV
 171         /* copy OCV OCI here */
 172         if (oci_ie_len > 0) {
 173                 os_memcpy(mgmt->u.action.u.wnm_sleep_req.variable +
 174                           wnmsleep_ie_len + wnmtfs_ie_len, oci_ie, oci_ie_len);
 175         }
 176 #endif /* CONFIG_OCV */
 177
 178         len = 1 + sizeof(mgmt->u.action.u.wnm_sleep_req) + wnmsleep_ie_len +
 179                 wnmtfs_ie_len + oci_ie_len;
 180
 181         res = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
 182                                   wpa_s->own_addr, wpa_s->bssid,
 183                                   &mgmt->u.action.category, len, 0);
 184         if (res < 0)
 185                 wpa_printf(MSG_DEBUG, "Failed to send WNM-Sleep Request "
 186                            "(action=%d, intval=%d)", action, intval);
 187         else
 188                 wpa_s->wnmsleep_used = 1;
 189
 190         os_free(wnmsleep_ie);
 191         os_free(wnmtfs_ie);
 192         os_free(oci_ie);
 193         os_free(mgmt);
 194
 195         return res;
 196 }
 197
 198
 199 static void wnm_sleep_mode_enter_success(struct wpa_supplicant *wpa_s,
 200                                          const u8 *tfsresp_ie_start,
 201                                          const u8 *tfsresp_ie_end)
 202 {
 203         wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_ENTER_CONFIRM,
 204                          wpa_s->bssid, NULL, NULL);
 205         /* remove GTK/IGTK ?? */
 206
 207         /* set the TFS Resp IE(s) */
 208         if (tfsresp_ie_start && tfsresp_ie_end &&
 209             tfsresp_ie_end - tfsresp_ie_start >= 0) {
 210                 u16 tfsresp_ie_len;
 211                 tfsresp_ie_len = (tfsresp_ie_end + tfsresp_ie_end[1] + 2) -
 212                         tfsresp_ie_start;
 213                 wpa_printf(MSG_DEBUG, "TFS Resp IE(s) found");
 214                 /* pass the TFS Resp IE(s) to driver for processing */
 215                 if (ieee80211_11_set_tfs_ie(wpa_s, wpa_s->bssid,
 216                                             tfsresp_ie_start,
 217                                             tfsresp_ie_len,
 218                                             WNM_SLEEP_TFS_RESP_IE_SET))
 219                         wpa_printf(MSG_DEBUG, "WNM: Fail to set TFS Resp IE");
 220         }
 221 }
 222
 223
 224 static void wnm_sleep_mode_exit_success(struct wpa_supplicant *wpa_s,
 225                                         const u8 *frm, u16 key_len_total)
 226 {
 227         u8 *ptr, *end;
 228         u8 gtk_len;
 229
 230         wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_EXIT_CONFIRM,  wpa_s->bssid,
 231                          NULL, NULL);
 232
 233         /* Install GTK/IGTK */
 234
 235         /* point to key data field */
 236         ptr = (u8 *) frm + 1 + 2;
 237         end = ptr + key_len_total;
 238         wpa_hexdump_key(MSG_DEBUG, "WNM: Key Data", ptr, key_len_total);
 239
 240         if (key_len_total && !wpa_sm_pmf_enabled(wpa_s->wpa)) {
 241                 wpa_msg(wpa_s, MSG_INFO,
 242                         "WNM: Ignore Key Data in WNM-Sleep Mode Response - PMF not enabled");
 243                 return;
 244         }
 245
 246         while (end - ptr > 1) {
 247                 if (2 + ptr[1] > end - ptr) {
 248                         wpa_printf(MSG_DEBUG, "WNM: Invalid Key Data element "
 249                                    "length");
 250                         if (end > ptr) {
 251                                 wpa_hexdump(MSG_DEBUG, "WNM: Remaining data",
 252                                             ptr, end - ptr);
 253                         }
 254                         break;
 255                 }
 256                 if (*ptr == WNM_SLEEP_SUBELEM_GTK) {
 257                         if (ptr[1] < 11 + 5) {
 258                                 wpa_printf(MSG_DEBUG, "WNM: Too short GTK "
 259                                            "subelem");
 260                                 break;
 261                         }
 262                         gtk_len = *(ptr + 4);
 263                         if (ptr[1] < 11 + gtk_len ||
 264                             gtk_len < 5 || gtk_len > 32) {
 265                                 wpa_printf(MSG_DEBUG, "WNM: Invalid GTK "
 266                                            "subelem");
 267                                 break;
 268                         }
 269                         wpa_wnmsleep_install_key(
 270                                 wpa_s->wpa,
 271                                 WNM_SLEEP_SUBELEM_GTK,
 272                                 ptr);
 273                         ptr += 13 + gtk_len;
 274 #ifdef CONFIG_IEEE80211W
 275                 } else if (*ptr == WNM_SLEEP_SUBELEM_IGTK) {
 276                         if (ptr[1] < 2 + 6 + WPA_IGTK_LEN) {
 277                                 wpa_printf(MSG_DEBUG, "WNM: Too short IGTK "
 278                                            "subelem");
 279                                 break;
 280                         }
 281                         wpa_wnmsleep_install_key(wpa_s->wpa,
 282                                                  WNM_SLEEP_SUBELEM_IGTK, ptr);
 283                         ptr += 10 + WPA_IGTK_LEN;
 284 #endif /* CONFIG_IEEE80211W */
 285                 } else
 286                         break; /* skip the loop */
 287         }
 288 }
 289
 290
 291 static void ieee802_11_rx_wnmsleep_resp(struct wpa_supplicant *wpa_s,
 292                                         const u8 *frm, int len)
 293 {
 294         /*
 295          * Action [1] | Dialog Token [1] | Key Data Len [2] | Key Data |
 296          * WNM-Sleep Mode IE | TFS Response IE
 297          */
 298         const u8 *pos = frm; /* point to payload after the action field */
 299         u16 key_len_total;
 300         struct wnm_sleep_element *wnmsleep_ie = NULL;
 301         /* multiple TFS Resp IE (assuming consecutive) */
 302         const u8 *tfsresp_ie_start = NULL;
 303         const u8 *tfsresp_ie_end = NULL;
 304 #ifdef CONFIG_OCV
 305         const u8 *oci_ie = NULL;
 306         u8 oci_ie_len = 0;
 307 #endif /* CONFIG_OCV */
 308         size_t left;
 309
 310         if (!wpa_s->wnmsleep_used) {
 311                 wpa_printf(MSG_DEBUG,
 312                            "WNM: Ignore WNM-Sleep Mode Response frame since WNM-Sleep Mode operation has not been requested");
 313                 return;
 314         }
 315
 316         if (len < 3)
 317                 return;
 318         key_len_total = WPA_GET_LE16(frm + 1);
 319
 320         wpa_printf(MSG_DEBUG, "WNM-Sleep Mode Response token=%u key_len_total=%d",
 321                    frm[0], key_len_total);
 322         left = len - 3;
 323         if (key_len_total > left) {
 324                 wpa_printf(MSG_INFO, "WNM: Too short frame for Key Data field");
 325                 return;
 326         }
 327         pos += 3 + key_len_total;
 328         while (pos - frm + 1 < len) {
 329                 u8 ie_len = *(pos + 1);
 330                 if (2 + ie_len > frm + len - pos) {
 331                         wpa_printf(MSG_INFO, "WNM: Invalid IE len %u", ie_len);
 332                         break;
 333                 }
 334                 wpa_hexdump(MSG_DEBUG, "WNM: Element", pos, 2 + ie_len);
 335                 if (*pos == WLAN_EID_WNMSLEEP && ie_len >= 4)
 336                         wnmsleep_ie = (struct wnm_sleep_element *) pos;
 337                 else if (*pos == WLAN_EID_TFS_RESP) {
 338                         if (!tfsresp_ie_start)
 339                                 tfsresp_ie_start = pos;
 340                         tfsresp_ie_end = pos;
 341 #ifdef CONFIG_OCV
 342                 } else if (*pos == WLAN_EID_EXTENSION && ie_len >= 1 &&
 343                            pos[2] == WLAN_EID_EXT_OCV_OCI) {
 344                         oci_ie = pos + 3;
 345                         oci_ie_len = ie_len - 1;
 346 #endif /* CONFIG_OCV */
 347                 } else
 348                         wpa_printf(MSG_DEBUG, "EID %d not recognized", *pos);
 349                 pos += ie_len + 2;
 350         }
 351
 352         if (!wnmsleep_ie) {
 353                 wpa_printf(MSG_DEBUG, "No WNM-Sleep IE found");
 354                 return;
 355         }
 356
 357 #ifdef CONFIG_OCV
 358         if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT &&
 359             wpa_sm_ocv_enabled(wpa_s->wpa)) {
 360                 struct wpa_channel_info ci;
 361
 362                 if (wpa_drv_channel_info(wpa_s, &ci) != 0) {
 363                         wpa_msg(wpa_s, MSG_WARNING,
 364                                 "Failed to get channel info to validate received OCI in WNM-Sleep Mode frame");
 365                         return;
 366                 }
 367
 368                 if (ocv_verify_tx_params(oci_ie, oci_ie_len, &ci,
 369                                          channel_width_to_int(ci.chanwidth),
 370                                          ci.seg1_idx) != 0) {
 371                         wpa_msg(wpa_s, MSG_WARNING, "WNM: %s", ocv_errorstr);
 372                         return;
 373                 }
 374         }
 375 #endif /* CONFIG_OCV */
 376
 377         wpa_s->wnmsleep_used = 0;
 378
 379         if (wnmsleep_ie->status == WNM_STATUS_SLEEP_ACCEPT ||
 380             wnmsleep_ie->status == WNM_STATUS_SLEEP_EXIT_ACCEPT_GTK_UPDATE) {
 381                 wpa_printf(MSG_DEBUG, "Successfully recv WNM-Sleep Response "
 382                            "frame (action=%d, intval=%d)",
 383                            wnmsleep_ie->action_type, wnmsleep_ie->intval);
 384                 if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_ENTER) {
 385                         wnm_sleep_mode_enter_success(wpa_s, tfsresp_ie_start,
 386                                                      tfsresp_ie_end);
 387                 } else if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT) {
 388                         wnm_sleep_mode_exit_success(wpa_s, frm, key_len_total);
 389                 }
 390         } else {
 391                 wpa_printf(MSG_DEBUG, "Reject recv WNM-Sleep Response frame "
 392                            "(action=%d, intval=%d)",
 393                            wnmsleep_ie->action_type, wnmsleep_ie->intval);
 394                 if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_ENTER)
 395                         wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_ENTER_FAIL,
 396                                          wpa_s->bssid, NULL, NULL);
 397                 else if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT)
 398                         wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_EXIT_FAIL,
 399                                          wpa_s->bssid, NULL, NULL);
 400         }
 401 }
 402
 403
 404 void wnm_deallocate_memory(struct wpa_supplicant *wpa_s)
 405 {
 406         int i;
 407
 408         for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
 409                 os_free(wpa_s->wnm_neighbor_report_elements[i].meas_pilot);
 410                 os_free(wpa_s->wnm_neighbor_report_elements[i].mul_bssid);
 411         }
 412
 413         wpa_s->wnm_num_neighbor_report = 0;
 414         os_free(wpa_s->wnm_neighbor_report_elements);
 415         wpa_s->wnm_neighbor_report_elements = NULL;
 416
 417         wpabuf_free(wpa_s->coloc_intf_elems);
 418         wpa_s->coloc_intf_elems = NULL;
 419 }
 420
 421
 422 static void wnm_parse_neighbor_report_elem(struct neighbor_report *rep,
 423                                            u8 id, u8 elen, const u8 *pos)
 424 {
 425         switch (id) {
 426         case WNM_NEIGHBOR_TSF:
 427                 if (elen < 2 + 2) {
 428                         wpa_printf(MSG_DEBUG, "WNM: Too short TSF");
 429                         break;
 430                 }
 431                 rep->tsf_offset = WPA_GET_LE16(pos);
 432                 rep->beacon_int = WPA_GET_LE16(pos + 2);
 433                 rep->tsf_present = 1;
 434                 break;
 435         case WNM_NEIGHBOR_CONDENSED_COUNTRY_STRING:
 436                 if (elen < 2) {
 437                         wpa_printf(MSG_DEBUG, "WNM: Too short condensed "
 438                                    "country string");
 439                         break;
 440                 }
 441                 os_memcpy(rep->country, pos, 2);
 442                 rep->country_present = 1;
 443                 break;
 444         case WNM_NEIGHBOR_BSS_TRANSITION_CANDIDATE:
 445                 if (elen < 1) {
 446                         wpa_printf(MSG_DEBUG, "WNM: Too short BSS transition "
 447                                    "candidate");
 448                         break;
 449                 }
 450                 rep->preference = pos[0];
 451                 rep->preference_present = 1;
 452                 break;
 453         case WNM_NEIGHBOR_BSS_TERMINATION_DURATION:
 454                 rep->bss_term_tsf = WPA_GET_LE64(pos);
 455                 rep->bss_term_dur = WPA_GET_LE16(pos + 8);
 456                 rep->bss_term_present = 1;
 457                 break;
 458         case WNM_NEIGHBOR_BEARING:
 459                 if (elen < 8) {
 460                         wpa_printf(MSG_DEBUG, "WNM: Too short neighbor "
 461                                    "bearing");
 462                         break;
 463                 }
 464                 rep->bearing = WPA_GET_LE16(pos);
 465                 rep->distance = WPA_GET_LE32(pos + 2);
 466                 rep->rel_height = WPA_GET_LE16(pos + 2 + 4);
 467                 rep->bearing_present = 1;
 468                 break;
 469         case WNM_NEIGHBOR_MEASUREMENT_PILOT:
 470                 if (elen < 1) {
 471                         wpa_printf(MSG_DEBUG, "WNM: Too short measurement "
 472                                    "pilot");
 473                         break;
 474                 }
 475                 os_free(rep->meas_pilot);
 476                 rep->meas_pilot = os_zalloc(sizeof(struct measurement_pilot));
 477                 if (rep->meas_pilot == NULL)
 478                         break;
 479                 rep->meas_pilot->measurement_pilot = pos[0];
 480                 rep->meas_pilot->subelem_len = elen - 1;
 481                 os_memcpy(rep->meas_pilot->subelems, pos + 1, elen - 1);
 482                 break;
 483         case WNM_NEIGHBOR_RRM_ENABLED_CAPABILITIES:
 484                 if (elen < 5) {
 485                         wpa_printf(MSG_DEBUG, "WNM: Too short RRM enabled "
 486                                    "capabilities");
 487                         break;
 488                 }
 489                 os_memcpy(rep->rm_capab, pos, 5);
 490                 rep->rm_capab_present = 1;
 491                 break;
 492         case WNM_NEIGHBOR_MULTIPLE_BSSID:
 493                 if (elen < 1) {
 494                         wpa_printf(MSG_DEBUG, "WNM: Too short multiple BSSID");
 495                         break;
 496                 }
 497                 os_free(rep->mul_bssid);
 498                 rep->mul_bssid = os_zalloc(sizeof(struct multiple_bssid));
 499                 if (rep->mul_bssid == NULL)
 500                         break;
 501                 rep->mul_bssid->max_bssid_indicator = pos[0];
 502                 rep->mul_bssid->subelem_len = elen - 1;
 503                 os_memcpy(rep->mul_bssid->subelems, pos + 1, elen - 1);
 504                 break;
 505         }
 506 }
 507
 508
 509 static int wnm_nei_get_chan(struct wpa_supplicant *wpa_s, u8 op_class, u8 chan)
 510 {
 511         struct wpa_bss *bss = wpa_s->current_bss;
 512         const char *country = NULL;
 513         int freq;
 514
 515         if (bss) {
 516                 const u8 *elem = wpa_bss_get_ie(bss, WLAN_EID_COUNTRY);
 517
 518                 if (elem && elem[1] >= 2)
 519                         country = (const char *) (elem + 2);
 520         }
 521
 522         freq = ieee80211_chan_to_freq(country, op_class, chan);
 523         if (freq <= 0 && op_class == 0) {
 524                 /*
 525                  * Some APs do not advertise correct operating class
 526                  * information. Try to determine the most likely operating
 527                  * frequency based on the channel number.
 528                  */
 529                 if (chan >= 1 && chan <= 13)
 530                         freq = 2407 + chan * 5;
 531                 else if (chan == 14)
 532                         freq = 2484;
 533                 else if (chan >= 36 && chan <= 169)
 534                         freq = 5000 + chan * 5;
 535         }
 536         return freq;
 537 }
 538
 539
 540 static void wnm_parse_neighbor_report(struct wpa_supplicant *wpa_s,
 541                                       const u8 *pos, u8 len,
 542                                       struct neighbor_report *rep)
 543 {
 544         u8 left = len;
 545
 546         if (left < 13) {
 547                 wpa_printf(MSG_DEBUG, "WNM: Too short neighbor report");
 548                 return;
 549         }
 550
 551         os_memcpy(rep->bssid, pos, ETH_ALEN);
 552         rep->bssid_info = WPA_GET_LE32(pos + ETH_ALEN);
 553         rep->regulatory_class = *(pos + 10);
 554         rep->channel_number = *(pos + 11);
 555         rep->phy_type = *(pos + 12);
 556
 557         pos += 13;
 558         left -= 13;
 559
 560         while (left >= 2) {
 561                 u8 id, elen;
 562
 563                 id = *pos++;
 564                 elen = *pos++;
 565                 wpa_printf(MSG_DEBUG, "WNM: Subelement id=%u len=%u", id, elen);
 566                 left -= 2;
 567                 if (elen > left) {
 568                         wpa_printf(MSG_DEBUG,
 569                                    "WNM: Truncated neighbor report subelement");
 570                         break;
 571                 }
 572                 wnm_parse_neighbor_report_elem(rep, id, elen, pos);
 573                 left -= elen;
 574                 pos += elen;
 575         }
 576
 577         rep->freq = wnm_nei_get_chan(wpa_s, rep->regulatory_class,
 578                                      rep->channel_number);
 579 }
 580
 581
 582 static void wnm_clear_acceptable(struct wpa_supplicant *wpa_s)
 583 {
 584         unsigned int i;
 585
 586         for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++)
 587                 wpa_s->wnm_neighbor_report_elements[i].acceptable = 0;
 588 }
 589
 590
 591 static struct wpa_bss * get_first_acceptable(struct wpa_supplicant *wpa_s)
 592 {
 593         unsigned int i;
 594         struct neighbor_report *nei;
 595
 596         for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
 597                 nei = &wpa_s->wnm_neighbor_report_elements[i];
 598                 if (nei->acceptable)
 599                         return wpa_bss_get_bssid(wpa_s, nei->bssid);
 600         }
 601
 602         return NULL;
 603 }
 604
 605
 606 #ifdef CONFIG_MBO
 607 static struct wpa_bss *
 608 get_mbo_transition_candidate(struct wpa_supplicant *wpa_s,
 609                              enum mbo_transition_reject_reason *reason)
 610 {
 611         struct wpa_bss *target = NULL;
 612         struct wpa_bss_trans_info params;
 613         struct wpa_bss_candidate_info *info = NULL;
 614         struct neighbor_report *nei = wpa_s->wnm_neighbor_report_elements;
 615         u8 *first_candidate_bssid = NULL, *pos;
 616         unsigned int i;
 617
 618         params.mbo_transition_reason = wpa_s->wnm_mbo_transition_reason;
 619         params.n_candidates = 0;
 620         params.bssid = os_calloc(wpa_s->wnm_num_neighbor_report, ETH_ALEN);
 621         if (!params.bssid)
 622                 return NULL;
 623
 624         pos = params.bssid;
 625         for (i = 0; i < wpa_s->wnm_num_neighbor_report; nei++, i++) {
 626                 if (nei->is_first)
 627                         first_candidate_bssid = nei->bssid;
 628                 if (!nei->acceptable)
 629                         continue;
 630                 os_memcpy(pos, nei->bssid, ETH_ALEN);
 631                 pos += ETH_ALEN;
 632                 params.n_candidates++;
 633         }
 634
 635         if (!params.n_candidates)
 636                 goto end;
 637
 638         info = wpa_drv_get_bss_trans_status(wpa_s, &params);
 639         if (!info) {
 640                 /* If failed to get candidate BSS transition status from driver,
 641                  * get the first acceptable candidate from wpa_supplicant.
 642                  */
 643                 target = wpa_bss_get_bssid(wpa_s, params.bssid);
 644                 goto end;
 645         }
 646
 647         /* Get the first acceptable candidate from driver */
 648         for (i = 0; i < info->num; i++) {
 649                 if (info->candidates[i].is_accept) {
 650                         target = wpa_bss_get_bssid(wpa_s,
 651                                                    info->candidates[i].bssid);
 652                         goto end;
 653                 }
 654         }
 655
 656         /* If Disassociation Imminent is set and driver rejects all the
 657          * candidate select first acceptable candidate which has
 658          * rssi > disassoc_imminent_rssi_threshold
 659          */
 660         if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_DISASSOC_IMMINENT) {
 661                 for (i = 0; i < info->num; i++) {
 662                         target = wpa_bss_get_bssid(wpa_s,
 663                                                    info->candidates[i].bssid);
 664                         if (target &&
 665                             (target->level <
 666                              wpa_s->conf->disassoc_imminent_rssi_threshold))
 667                                 continue;
 668                         goto end;
 669                 }
 670         }
 671
 672         /* While sending BTM reject use reason code of the first candidate
 673          * received in BTM request frame
 674          */
 675         if (reason) {
 676                 for (i = 0; i < info->num; i++) {
 677                         if (first_candidate_bssid &&
 678                             os_memcmp(first_candidate_bssid,
 679                                       info->candidates[i].bssid, ETH_ALEN) == 0)
 680                         {
 681                                 *reason = info->candidates[i].reject_reason;
 682                                 break;
 683                         }
 684                 }
 685         }
 686
 687         target = NULL;
 688
 689 end:
 690         os_free(params.bssid);
 691         if (info) {
 692                 os_free(info->candidates);
 693                 os_free(info);
 694         }
 695         return target;
 696 }
 697 #endif /* CONFIG_MBO */
 698
 699
 700 static struct wpa_bss *
 701 compare_scan_neighbor_results(struct wpa_supplicant *wpa_s, os_time_t age_secs,
 702                               enum mbo_transition_reject_reason *reason)
 703 {
 704         u8 i;
 705         struct wpa_bss *bss = wpa_s->current_bss;
 706         struct wpa_bss *target;
 707
 708         if (!bss)
 709                 return NULL;
 710
 711         wpa_printf(MSG_DEBUG, "WNM: Current BSS " MACSTR " RSSI %d",
 712                    MAC2STR(wpa_s->bssid), bss->level);
 713
 714         wnm_clear_acceptable(wpa_s);
 715
 716         for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
 717                 struct neighbor_report *nei;
 718
 719                 nei = &wpa_s->wnm_neighbor_report_elements[i];
 720                 if (nei->preference_present && nei->preference == 0) {
 721                         wpa_printf(MSG_DEBUG, "Skip excluded BSS " MACSTR,
 722                                    MAC2STR(nei->bssid));
 723                         continue;
 724                 }
 725
 726                 target = wpa_bss_get_bssid(wpa_s, nei->bssid);
 727                 if (!target) {
 728                         wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
 729                                    " (pref %d) not found in scan results",
 730                                    MAC2STR(nei->bssid),
 731                                    nei->preference_present ? nei->preference :
 732                                    -1);
 733                         continue;
 734                 }
 735
 736                 if (age_secs) {
 737                         struct os_reltime now;
 738
 739                         if (os_get_reltime(&now) == 0 &&
 740                             os_reltime_expired(&now, &target->last_update,
 741                                                age_secs)) {
 742                                 wpa_printf(MSG_DEBUG,
 743                                            "Candidate BSS is more than %ld seconds old",
 744                                            age_secs);
 745                                 continue;
 746                         }
 747                 }
 748
 749                 if (bss->ssid_len != target->ssid_len ||
 750                     os_memcmp(bss->ssid, target->ssid, bss->ssid_len) != 0) {
 751                         /*
 752                          * TODO: Could consider allowing transition to another
 753                          * ESS if PMF was enabled for the association.
 754                          */
 755                         wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
 756                                    " (pref %d) in different ESS",
 757                                    MAC2STR(nei->bssid),
 758                                    nei->preference_present ? nei->preference :
 759                                    -1);
 760                         continue;
 761                 }
 762
 763                 if (wpa_s->current_ssid &&
 764                     !wpa_scan_res_match(wpa_s, 0, target, wpa_s->current_ssid,
 765                                         1, 0)) {
 766                         wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
 767                                    " (pref %d) does not match the current network profile",
 768                                    MAC2STR(nei->bssid),
 769                                    nei->preference_present ? nei->preference :
 770                                    -1);
 771                         continue;
 772                 }
 773
 774                 if (wpa_is_bss_tmp_disallowed(wpa_s, target)) {
 775                         wpa_printf(MSG_DEBUG,
 776                                    "MBO: Candidate BSS " MACSTR
 777                                    " retry delay is not over yet",
 778                                    MAC2STR(nei->bssid));
 779                         continue;
 780                 }
 781
 782                 if (target->level < bss->level && target->level < -80) {
 783                         wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
 784                                    " (pref %d) does not have sufficient signal level (%d)",
 785                                    MAC2STR(nei->bssid),
 786                                    nei->preference_present ? nei->preference :
 787                                    -1,
 788                                    target->level);
 789                         continue;
 790                 }
 791
 792                 nei->acceptable = 1;
 793         }
 794
 795 #ifdef CONFIG_MBO
 796         if (wpa_s->wnm_mbo_trans_reason_present)
 797                 target = get_mbo_transition_candidate(wpa_s, reason);
 798         else
 799                 target = get_first_acceptable(wpa_s);
 800 #else /* CONFIG_MBO */
 801         target = get_first_acceptable(wpa_s);
 802 #endif /* CONFIG_MBO */
 803
 804         if (target) {
 805                 wpa_printf(MSG_DEBUG,
 806                            "WNM: Found an acceptable preferred transition candidate BSS "
 807                            MACSTR " (RSSI %d)",
 808                            MAC2STR(target->bssid), target->level);
 809         }
 810
 811         return target;
 812 }
 813
 814
 815 static int wpa_bss_ies_eq(struct wpa_bss *a, struct wpa_bss *b, u8 eid)
 816 {
 817         const u8 *ie_a, *ie_b;
 818
 819         if (!a || !b)
 820                 return 0;
 821
 822         ie_a = wpa_bss_get_ie(a, eid);
 823         ie_b = wpa_bss_get_ie(b, eid);
 824
 825         if (!ie_a || !ie_b || ie_a[1] != ie_b[1])
 826                 return 0;
 827
 828         return os_memcmp(ie_a, ie_b, ie_a[1]) == 0;
 829 }
 830
 831
 832 static u32 wnm_get_bss_info(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
 833 {
 834         u32 info = 0;
 835
 836         info |= NEI_REP_BSSID_INFO_AP_UNKNOWN_REACH;
 837
 838         /*
 839          * Leave the security and key scope bits unset to indicate that the
 840          * security information is not available.
 841          */
 842
 843         if (bss->caps & WLAN_CAPABILITY_SPECTRUM_MGMT)
 844                 info |= NEI_REP_BSSID_INFO_SPECTRUM_MGMT;
 845         if (bss->caps & WLAN_CAPABILITY_QOS)
 846                 info |= NEI_REP_BSSID_INFO_QOS;
 847         if (bss->caps & WLAN_CAPABILITY_APSD)
 848                 info |= NEI_REP_BSSID_INFO_APSD;
 849         if (bss->caps & WLAN_CAPABILITY_RADIO_MEASUREMENT)
 850                 info |= NEI_REP_BSSID_INFO_RM;
 851         if (bss->caps & WLAN_CAPABILITY_DELAYED_BLOCK_ACK)
 852                 info |= NEI_REP_BSSID_INFO_DELAYED_BA;
 853         if (bss->caps & WLAN_CAPABILITY_IMM_BLOCK_ACK)
 854                 info |= NEI_REP_BSSID_INFO_IMM_BA;
 855         if (wpa_bss_ies_eq(bss, wpa_s->current_bss, WLAN_EID_MOBILITY_DOMAIN))
 856                 info |= NEI_REP_BSSID_INFO_MOBILITY_DOMAIN;
 857         if (wpa_bss_ies_eq(bss, wpa_s->current_bss, WLAN_EID_HT_CAP))
 858                 info |= NEI_REP_BSSID_INFO_HT;
 859
 860         return info;
 861 }
 862
 863
 864 static int wnm_add_nei_rep(struct wpabuf **buf, const u8 *bssid,
 865                            u32 bss_info, u8 op_class, u8 chan, u8 phy_type,
 866                            u8 pref)
 867 {
 868         if (wpabuf_len(*buf) + 18 >
 869             IEEE80211_MAX_MMPDU_SIZE - IEEE80211_HDRLEN) {
 870                 wpa_printf(MSG_DEBUG,
 871                            "WNM: No room in frame for Neighbor Report element");
 872                 return -1;
 873         }
 874
 875         if (wpabuf_resize(buf, 18) < 0) {
 876                 wpa_printf(MSG_DEBUG,
 877                            "WNM: Failed to allocate memory for Neighbor Report element");
 878                 return -1;
 879         }
 880
 881         wpabuf_put_u8(*buf, WLAN_EID_NEIGHBOR_REPORT);
 882         /* length: 13 for basic neighbor report + 3 for preference subelement */
 883         wpabuf_put_u8(*buf, 16);
 884         wpabuf_put_data(*buf, bssid, ETH_ALEN);
 885         wpabuf_put_le32(*buf, bss_info);
 886         wpabuf_put_u8(*buf, op_class);
 887         wpabuf_put_u8(*buf, chan);
 888         wpabuf_put_u8(*buf, phy_type);
 889         wpabuf_put_u8(*buf, WNM_NEIGHBOR_BSS_TRANSITION_CANDIDATE);
 890         wpabuf_put_u8(*buf, 1);
 891         wpabuf_put_u8(*buf, pref);
 892         return 0;
 893 }
 894
 895
 896 static int wnm_nei_rep_add_bss(struct wpa_supplicant *wpa_s,
 897                                struct wpa_bss *bss, struct wpabuf **buf,
 898                                u8 pref)
 899 {
 900         const u8 *ie;
 901         u8 op_class, chan;
 902         int sec_chan = 0, vht = 0;
 903         enum phy_type phy_type;
 904         u32 info;
 905         struct ieee80211_ht_operation *ht_oper = NULL;
 906         struct ieee80211_vht_operation *vht_oper = NULL;
 907
 908         ie = wpa_bss_get_ie(bss, WLAN_EID_HT_OPERATION);
 909         if (ie && ie[1] >= 2) {
 910                 ht_oper = (struct ieee80211_ht_operation *) (ie + 2);
 911
 912                 if (ht_oper->ht_param & HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
 913                         sec_chan = 1;
 914                 else if (ht_oper->ht_param &
 915                          HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
 916                         sec_chan = -1;
 917         }
 918
 919         ie = wpa_bss_get_ie(bss, WLAN_EID_VHT_OPERATION);
 920         if (ie && ie[1] >= 1) {
 921                 vht_oper = (struct ieee80211_vht_operation *) (ie + 2);
 922
 923                 if (vht_oper->vht_op_info_chwidth == VHT_CHANWIDTH_80MHZ ||
 924                     vht_oper->vht_op_info_chwidth == VHT_CHANWIDTH_160MHZ ||
 925                     vht_oper->vht_op_info_chwidth == VHT_CHANWIDTH_80P80MHZ)
 926                         vht = vht_oper->vht_op_info_chwidth;
 927         }
 928
 929         if (ieee80211_freq_to_channel_ext(bss->freq, sec_chan, vht, &op_class,
 930                                           &chan) == NUM_HOSTAPD_MODES) {
 931                 wpa_printf(MSG_DEBUG,
 932                            "WNM: Cannot determine operating class and channel");
 933                 return -2;
 934         }
 935
 936         phy_type = ieee80211_get_phy_type(bss->freq, (ht_oper != NULL),
 937                                           (vht_oper != NULL));
 938         if (phy_type == PHY_TYPE_UNSPECIFIED) {
 939                 wpa_printf(MSG_DEBUG,
 940                            "WNM: Cannot determine BSS phy type for Neighbor Report");
 941                 return -2;
 942         }
 943
 944         info = wnm_get_bss_info(wpa_s, bss);
 945
 946         return wnm_add_nei_rep(buf, bss->bssid, info, op_class, chan, phy_type,
 947                                pref);
 948 }
 949
 950
 951 static void wnm_add_cand_list(struct wpa_supplicant *wpa_s, struct wpabuf **buf)
 952 {
 953         unsigned int i, pref = 255;
 954         struct os_reltime now;
 955         struct wpa_ssid *ssid = wpa_s->current_ssid;
 956
 957         if (!ssid)
 958                 return;
 959
 960         /*
 961          * TODO: Define when scan results are no longer valid for the candidate
 962          * list.
 963          */
 964         os_get_reltime(&now);
 965         if (os_reltime_expired(&now, &wpa_s->last_scan, 10))
 966                 return;
 967
 968         wpa_printf(MSG_DEBUG,
 969                    "WNM: Add candidate list to BSS Transition Management Response frame");
 970         for (i = 0; i < wpa_s->last_scan_res_used && pref; i++) {
 971                 struct wpa_bss *bss = wpa_s->last_scan_res[i];
 972                 int res;
 973
 974                 if (wpa_scan_res_match(wpa_s, i, bss, ssid, 1, 0)) {
 975                         res = wnm_nei_rep_add_bss(wpa_s, bss, buf, pref--);
 976                         if (res == -2)
 977                                 continue; /* could not build entry for BSS */
 978                         if (res < 0)
 979                                 break; /* no more room for candidates */
 980                         if (pref == 1)
 981                                 break;
 982                 }
 983         }
 984
 985         wpa_hexdump_buf(MSG_DEBUG,
 986                         "WNM: BSS Transition Management Response candidate list",
 987                         *buf);
 988 }
 989
 990
 991 #define BTM_RESP_MIN_SIZE       5 + ETH_ALEN
 992
 993 static void wnm_send_bss_transition_mgmt_resp(
 994         struct wpa_supplicant *wpa_s, u8 dialog_token,
 995         enum bss_trans_mgmt_status_code status,
 996         enum mbo_transition_reject_reason reason,
 997         u8 delay, const u8 *target_bssid)
 998 {
 999         struct wpabuf *buf;
1000         int res;
1001
1002         wpa_printf(MSG_DEBUG,
1003                    "WNM: Send BSS Transition Management Response to " MACSTR
1004                    " dialog_token=%u status=%u reason=%u delay=%d",
1005                    MAC2STR(wpa_s->bssid), dialog_token, status, reason, delay);
1006         if (!wpa_s->current_bss) {
1007                 wpa_printf(MSG_DEBUG,
1008                            "WNM: Current BSS not known - drop response");
1009                 return;
1010         }
1011
1012         buf = wpabuf_alloc(BTM_RESP_MIN_SIZE);
1013         if (!buf) {
1014                 wpa_printf(MSG_DEBUG,
1015                            "WNM: Failed to allocate memory for BTM response");
1016                 return;
1017         }
1018
1019         wpa_s->bss_tm_status = status;
1020         wpas_notify_bss_tm_status(wpa_s);
1021
1022         wpabuf_put_u8(buf, WLAN_ACTION_WNM);
1023         wpabuf_put_u8(buf, WNM_BSS_TRANS_MGMT_RESP);
1024         wpabuf_put_u8(buf, dialog_token);
1025         wpabuf_put_u8(buf, status);
1026         wpabuf_put_u8(buf, delay);
1027         if (target_bssid) {
1028                 wpabuf_put_data(buf, target_bssid, ETH_ALEN);
1029         } else if (status == WNM_BSS_TM_ACCEPT) {
1030                 /*
1031                  * P802.11-REVmc clarifies that the Target BSSID field is always
1032                  * present when status code is zero, so use a fake value here if
1033                  * no BSSID is yet known.
1034                  */
1035                 wpabuf_put_data(buf, "\0\0\0\0\0\0", ETH_ALEN);
1036         }
1037
1038         if (status == WNM_BSS_TM_ACCEPT)
1039                 wnm_add_cand_list(wpa_s, &buf);
1040
1041 #ifdef CONFIG_MBO
1042         if (status != WNM_BSS_TM_ACCEPT &&
1043             wpa_bss_get_vendor_ie(wpa_s->current_bss, MBO_IE_VENDOR_TYPE)) {
1044                 u8 mbo[10];
1045                 size_t ret;
1046
1047                 ret = wpas_mbo_ie_bss_trans_reject(wpa_s, mbo, sizeof(mbo),
1048                                                    reason);
1049                 if (ret) {
1050                         if (wpabuf_resize(&buf, ret) < 0) {
1051                                 wpabuf_free(buf);
1052                                 wpa_printf(MSG_DEBUG,
1053                                            "WNM: Failed to allocate memory for MBO IE");
1054                                 return;
1055                         }
1056
1057                         wpabuf_put_data(buf, mbo, ret);
1058                 }
1059         }
1060 #endif /* CONFIG_MBO */
1061
1062         res = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1063                                   wpa_s->own_addr, wpa_s->bssid,
1064                                   wpabuf_head_u8(buf), wpabuf_len(buf), 0);
1065         if (res < 0) {
1066                 wpa_printf(MSG_DEBUG,
1067                            "WNM: Failed to send BSS Transition Management Response");
1068         }
1069
1070         wpabuf_free(buf);
1071 }
1072
1073
1074 static void wnm_bss_tm_connect(struct wpa_supplicant *wpa_s,
1075                                struct wpa_bss *bss, struct wpa_ssid *ssid,
1076                                int after_new_scan)
1077 {
1078         wpa_dbg(wpa_s, MSG_DEBUG,
1079                 "WNM: Transition to BSS " MACSTR
1080                 " based on BSS Transition Management Request (old BSSID "
1081                 MACSTR " after_new_scan=%d)",
1082                 MAC2STR(bss->bssid), MAC2STR(wpa_s->bssid), after_new_scan);
1083
1084         /* Send the BSS Management Response - Accept */
1085         if (wpa_s->wnm_reply) {
1086                 wpa_s->wnm_reply = 0;
1087                 wpa_printf(MSG_DEBUG,
1088                            "WNM: Sending successful BSS Transition Management Response");
1089                 wnm_send_bss_transition_mgmt_resp(
1090                         wpa_s, wpa_s->wnm_dialog_token, WNM_BSS_TM_ACCEPT,
1091                         MBO_TRANSITION_REJECT_REASON_UNSPECIFIED, 0,
1092                         bss->bssid);
1093         }
1094
1095         if (bss == wpa_s->current_bss) {
1096                 wpa_printf(MSG_DEBUG,
1097                            "WNM: Already associated with the preferred candidate");
1098                 wnm_deallocate_memory(wpa_s);
1099                 return;
1100         }
1101
1102         wpa_s->reassociate = 1;
1103         wpa_printf(MSG_DEBUG, "WNM: Issuing connect");
1104         wpa_supplicant_connect(wpa_s, bss, ssid);
1105         wnm_deallocate_memory(wpa_s);
1106 }
1107
1108
1109 int wnm_scan_process(struct wpa_supplicant *wpa_s, int reply_on_fail)
1110 {
1111         struct wpa_bss *bss;
1112         struct wpa_ssid *ssid = wpa_s->current_ssid;
1113         enum bss_trans_mgmt_status_code status = WNM_BSS_TM_REJECT_UNSPECIFIED;
1114         enum mbo_transition_reject_reason reason =
1115                 MBO_TRANSITION_REJECT_REASON_UNSPECIFIED;
1116
1117         if (!wpa_s->wnm_neighbor_report_elements)
1118                 return 0;
1119
1120         wpa_dbg(wpa_s, MSG_DEBUG,
1121                 "WNM: Process scan results for BSS Transition Management");
1122         if (os_reltime_before(&wpa_s->wnm_cand_valid_until,
1123                               &wpa_s->scan_trigger_time)) {
1124                 wpa_printf(MSG_DEBUG, "WNM: Previously stored BSS transition candidate list is not valid anymore - drop it");
1125                 wnm_deallocate_memory(wpa_s);
1126                 return 0;
1127         }
1128
1129         if (!wpa_s->current_bss ||
1130             os_memcmp(wpa_s->wnm_cand_from_bss, wpa_s->current_bss->bssid,
1131                       ETH_ALEN) != 0) {
1132                 wpa_printf(MSG_DEBUG, "WNM: Stored BSS transition candidate list not from the current BSS - ignore it");
1133                 return 0;
1134         }
1135
1136         /* Compare the Neighbor Report and scan results */
1137         bss = compare_scan_neighbor_results(wpa_s, 0, &reason);
1138         if (!bss) {
1139                 wpa_printf(MSG_DEBUG, "WNM: No BSS transition candidate match found");
1140                 status = WNM_BSS_TM_REJECT_NO_SUITABLE_CANDIDATES;
1141                 goto send_bss_resp_fail;
1142         }
1143
1144         /* Associate to the network */
1145         wnm_bss_tm_connect(wpa_s, bss, ssid, 1);
1146         return 1;
1147
1148 send_bss_resp_fail:
1149         if (!reply_on_fail)
1150                 return 0;
1151
1152         /* Send reject response for all the failures */
1153
1154         if (wpa_s->wnm_reply) {
1155                 wpa_s->wnm_reply = 0;
1156                 wnm_send_bss_transition_mgmt_resp(wpa_s,
1157                                                   wpa_s->wnm_dialog_token,
1158                                                   status, reason, 0, NULL);
1159         }
1160         wnm_deallocate_memory(wpa_s);
1161
1162         return 0;
1163 }
1164
1165
1166 static int cand_pref_compar(const void *a, const void *b)
1167 {
1168         const struct neighbor_report *aa = a;
1169         const struct neighbor_report *bb = b;
1170
1171         if (!aa->preference_present && !bb->preference_present)
1172                 return 0;
1173         if (!aa->preference_present)
1174                 return 1;
1175         if (!bb->preference_present)
1176                 return -1;
1177         if (bb->preference > aa->preference)
1178                 return 1;
1179         if (bb->preference < aa->preference)
1180                 return -1;
1181         return 0;
1182 }
1183
1184
1185 static void wnm_sort_cand_list(struct wpa_supplicant *wpa_s)
1186 {
1187         if (!wpa_s->wnm_neighbor_report_elements)
1188                 return;
1189         qsort(wpa_s->wnm_neighbor_report_elements,
1190               wpa_s->wnm_num_neighbor_report, sizeof(struct neighbor_report),
1191               cand_pref_compar);
1192 }
1193
1194
1195 static void wnm_dump_cand_list(struct wpa_supplicant *wpa_s)
1196 {
1197         unsigned int i;
1198
1199         wpa_printf(MSG_DEBUG, "WNM: BSS Transition Candidate List");
1200         if (!wpa_s->wnm_neighbor_report_elements)
1201                 return;
1202         for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
1203                 struct neighbor_report *nei;
1204
1205                 nei = &wpa_s->wnm_neighbor_report_elements[i];
1206                 wpa_printf(MSG_DEBUG, "%u: " MACSTR
1207                            " info=0x%x op_class=%u chan=%u phy=%u pref=%d freq=%d",
1208                            i, MAC2STR(nei->bssid), nei->bssid_info,
1209                            nei->regulatory_class,
1210                            nei->channel_number, nei->phy_type,
1211                            nei->preference_present ? nei->preference : -1,
1212                            nei->freq);
1213         }
1214 }
1215
1216
1217 static int chan_supported(struct wpa_supplicant *wpa_s, int freq)
1218 {
1219         unsigned int i;
1220
1221         for (i = 0; i < wpa_s->hw.num_modes; i++) {
1222                 struct hostapd_hw_modes *mode = &wpa_s->hw.modes[i];
1223                 int j;
1224
1225                 for (j = 0; j < mode->num_channels; j++) {
1226                         struct hostapd_channel_data *chan;
1227
1228                         chan = &mode->channels[j];
1229                         if (chan->freq == freq &&
1230                             !(chan->flag & HOSTAPD_CHAN_DISABLED))
1231                                 return 1;
1232                 }
1233         }
1234
1235         return 0;
1236 }
1237
1238
1239 static void wnm_set_scan_freqs(struct wpa_supplicant *wpa_s)
1240 {
1241         int *freqs;
1242         int num_freqs = 0;
1243         unsigned int i;
1244
1245         if (!wpa_s->wnm_neighbor_report_elements)
1246                 return;
1247
1248         if (wpa_s->hw.modes == NULL)
1249                 return;
1250
1251         os_free(wpa_s->next_scan_freqs);
1252         wpa_s->next_scan_freqs = NULL;
1253
1254         freqs = os_calloc(wpa_s->wnm_num_neighbor_report + 1, sizeof(int));
1255         if (freqs == NULL)
1256                 return;
1257
1258         for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
1259                 struct neighbor_report *nei;
1260
1261                 nei = &wpa_s->wnm_neighbor_report_elements[i];
1262                 if (nei->freq <= 0) {
1263                         wpa_printf(MSG_DEBUG,
1264                                    "WNM: Unknown neighbor operating frequency for "
1265                                    MACSTR " - scan all channels",
1266                                    MAC2STR(nei->bssid));
1267                         os_free(freqs);
1268                         return;
1269                 }
1270                 if (chan_supported(wpa_s, nei->freq))
1271                         add_freq(freqs, &num_freqs, nei->freq);
1272         }
1273
1274         if (num_freqs == 0) {
1275                 os_free(freqs);
1276                 return;
1277         }
1278
1279         wpa_printf(MSG_DEBUG,
1280                    "WNM: Scan %d frequencies based on transition candidate list",
1281                    num_freqs);
1282         wpa_s->next_scan_freqs = freqs;
1283 }
1284
1285
1286 static int wnm_fetch_scan_results(struct wpa_supplicant *wpa_s)
1287 {
1288         struct wpa_scan_results *scan_res;
1289         struct wpa_bss *bss;
1290         struct wpa_ssid *ssid = wpa_s->current_ssid;
1291         u8 i, found = 0;
1292         size_t j;
1293
1294         wpa_dbg(wpa_s, MSG_DEBUG,
1295                 "WNM: Fetch current scan results from the driver for checking transition candidates");
1296         scan_res = wpa_drv_get_scan_results2(wpa_s);
1297         if (!scan_res) {
1298                 wpa_dbg(wpa_s, MSG_DEBUG, "WNM: Failed to get scan results");
1299                 return 0;
1300         }
1301
1302         if (scan_res->fetch_time.sec == 0)
1303                 os_get_reltime(&scan_res->fetch_time);
1304
1305         filter_scan_res(wpa_s, scan_res);
1306
1307         for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
1308                 struct neighbor_report *nei;
1309
1310                 nei = &wpa_s->wnm_neighbor_report_elements[i];
1311                 if (nei->preference_present && nei->preference == 0)
1312                         continue;
1313
1314                 for (j = 0; j < scan_res->num; j++) {
1315                         struct wpa_scan_res *res;
1316                         const u8 *ssid_ie;
1317
1318                         res = scan_res->res[j];
1319                         if (os_memcmp(nei->bssid, res->bssid, ETH_ALEN) != 0 ||
1320                             res->age > WNM_SCAN_RESULT_AGE * 1000)
1321                                 continue;
1322                         bss = wpa_s->current_bss;
1323                         ssid_ie = wpa_scan_get_ie(res, WLAN_EID_SSID);
1324                         if (bss && ssid_ie &&
1325                             (bss->ssid_len != ssid_ie[1] ||
1326                              os_memcmp(bss->ssid, ssid_ie + 2,
1327                                        bss->ssid_len) != 0))
1328                                 continue;
1329
1330                         /* Potential candidate found */
1331                         found = 1;
1332                         scan_snr(res);
1333                         scan_est_throughput(wpa_s, res);
1334                         wpa_bss_update_scan_res(wpa_s, res,
1335                                                 &scan_res->fetch_time);
1336                 }
1337         }
1338
1339         wpa_scan_results_free(scan_res);
1340         if (!found) {
1341                 wpa_dbg(wpa_s, MSG_DEBUG,
1342                         "WNM: No transition candidate matches existing scan results");
1343                 return 0;
1344         }
1345
1346         bss = compare_scan_neighbor_results(wpa_s, WNM_SCAN_RESULT_AGE, NULL);
1347         if (!bss) {
1348                 wpa_dbg(wpa_s, MSG_DEBUG,
1349                         "WNM: Comparison of scan results against transition candidates did not find matches");
1350                 return 0;
1351         }
1352
1353         /* Associate to the network */
1354         wnm_bss_tm_connect(wpa_s, bss, ssid, 0);
1355         return 1;
1356 }
1357
1358
1359 static void ieee802_11_rx_bss_trans_mgmt_req(struct wpa_supplicant *wpa_s,
1360                                              const u8 *pos, const u8 *end,
1361                                              int reply)
1362 {
1363         unsigned int beacon_int;
1364         u8 valid_int;
1365 #ifdef CONFIG_MBO
1366         const u8 *vendor;
1367 #endif /* CONFIG_MBO */
1368
1369         if (end - pos < 5)
1370                 return;
1371
1372 #ifdef CONFIG_MBO
1373         wpa_s->wnm_mbo_trans_reason_present = 0;
1374         wpa_s->wnm_mbo_transition_reason = 0;
1375 #endif /* CONFIG_MBO */
1376
1377         if (wpa_s->current_bss)
1378                 beacon_int = wpa_s->current_bss->beacon_int;
1379         else
1380                 beacon_int = 100; /* best guess */
1381
1382         wpa_s->wnm_dialog_token = pos[0];
1383         wpa_s->wnm_mode = pos[1];
1384         wpa_s->wnm_dissoc_timer = WPA_GET_LE16(pos + 2);
1385         valid_int = pos[4];
1386         wpa_s->wnm_reply = reply;
1387
1388         wpa_printf(MSG_DEBUG, "WNM: BSS Transition Management Request: "
1389                    "dialog_token=%u request_mode=0x%x "
1390                    "disassoc_timer=%u validity_interval=%u",
1391                    wpa_s->wnm_dialog_token, wpa_s->wnm_mode,
1392                    wpa_s->wnm_dissoc_timer, valid_int);
1393
1394 #if defined(CONFIG_MBO) && defined(CONFIG_TESTING_OPTIONS)
1395         if (wpa_s->reject_btm_req_reason) {
1396                 wpa_printf(MSG_INFO,
1397                            "WNM: Testing - reject BSS Transition Management Request: reject_btm_req_reason=%d",
1398                            wpa_s->reject_btm_req_reason);
1399                 wnm_send_bss_transition_mgmt_resp(
1400                         wpa_s, wpa_s->wnm_dialog_token,
1401                         wpa_s->reject_btm_req_reason,
1402                         MBO_TRANSITION_REJECT_REASON_UNSPECIFIED, 0, NULL);
1403                 return;
1404         }
1405 #endif /* CONFIG_MBO && CONFIG_TESTING_OPTIONS */
1406
1407         pos += 5;
1408
1409         if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_BSS_TERMINATION_INCLUDED) {
1410                 if (end - pos < 12) {
1411                         wpa_printf(MSG_DEBUG, "WNM: Too short BSS TM Request");
1412                         return;
1413                 }
1414                 os_memcpy(wpa_s->wnm_bss_termination_duration, pos, 12);
1415                 pos += 12; /* BSS Termination Duration */
1416         }
1417
1418         if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_ESS_DISASSOC_IMMINENT) {
1419                 char url[256];
1420
1421                 if (end - pos < 1 || 1 + pos[0] > end - pos) {
1422                         wpa_printf(MSG_DEBUG, "WNM: Invalid BSS Transition "
1423                                    "Management Request (URL)");
1424                         return;
1425                 }
1426                 os_memcpy(url, pos + 1, pos[0]);
1427                 url[pos[0]] = '\0';
1428                 pos += 1 + pos[0];
1429
1430                 wpa_msg(wpa_s, MSG_INFO, ESS_DISASSOC_IMMINENT "%d %u %s",
1431                         wpa_sm_pmf_enabled(wpa_s->wpa),
1432                         wpa_s->wnm_dissoc_timer * beacon_int * 128 / 125, url);
1433         }
1434
1435         if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_DISASSOC_IMMINENT) {
1436                 wpa_msg(wpa_s, MSG_INFO, "WNM: Disassociation Imminent - "
1437                         "Disassociation Timer %u", wpa_s->wnm_dissoc_timer);
1438                 if (wpa_s->wnm_dissoc_timer && !wpa_s->scanning) {
1439                         /* TODO: mark current BSS less preferred for
1440                          * selection */
1441                         wpa_printf(MSG_DEBUG, "Trying to find another BSS");
1442                         wpa_supplicant_req_scan(wpa_s, 0, 0);
1443                 }
1444         }
1445
1446 #ifdef CONFIG_MBO
1447         vendor = get_ie(pos, end - pos, WLAN_EID_VENDOR_SPECIFIC);
1448         if (vendor)
1449                 wpas_mbo_ie_trans_req(wpa_s, vendor + 2, vendor[1]);
1450 #endif /* CONFIG_MBO */
1451
1452         if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_PREF_CAND_LIST_INCLUDED) {
1453                 unsigned int valid_ms;
1454
1455                 wpa_msg(wpa_s, MSG_INFO, "WNM: Preferred List Available");
1456                 wnm_deallocate_memory(wpa_s);
1457                 wpa_s->wnm_neighbor_report_elements = os_calloc(
1458                         WNM_MAX_NEIGHBOR_REPORT,
1459                         sizeof(struct neighbor_report));
1460                 if (wpa_s->wnm_neighbor_report_elements == NULL)
1461                         return;
1462
1463                 while (end - pos >= 2 &&
1464                        wpa_s->wnm_num_neighbor_report < WNM_MAX_NEIGHBOR_REPORT)
1465                 {
1466                         u8 tag = *pos++;
1467                         u8 len = *pos++;
1468
1469                         wpa_printf(MSG_DEBUG, "WNM: Neighbor report tag %u",
1470                                    tag);
1471                         if (len > end - pos) {
1472                                 wpa_printf(MSG_DEBUG, "WNM: Truncated request");
1473                                 return;
1474                         }
1475                         if (tag == WLAN_EID_NEIGHBOR_REPORT) {
1476                                 struct neighbor_report *rep;
1477                                 rep = &wpa_s->wnm_neighbor_report_elements[
1478                                         wpa_s->wnm_num_neighbor_report];
1479                                 wnm_parse_neighbor_report(wpa_s, pos, len, rep);
1480                                 wpa_s->wnm_num_neighbor_report++;
1481 #ifdef CONFIG_MBO
1482                                 if (wpa_s->wnm_mbo_trans_reason_present &&
1483                                     wpa_s->wnm_num_neighbor_report == 1) {
1484                                         rep->is_first = 1;
1485                                         wpa_printf(MSG_DEBUG,
1486                                                    "WNM: First transition candidate is "
1487                                                    MACSTR, MAC2STR(rep->bssid));
1488                                 }
1489 #endif /* CONFIG_MBO */
1490                         }
1491
1492                         pos += len;
1493                 }
1494
1495                 if (!wpa_s->wnm_num_neighbor_report) {
1496                         wpa_printf(MSG_DEBUG,
1497                                    "WNM: Candidate list included bit is set, but no candidates found");
1498                         wnm_send_bss_transition_mgmt_resp(
1499                                 wpa_s, wpa_s->wnm_dialog_token,
1500                                 WNM_BSS_TM_REJECT_NO_SUITABLE_CANDIDATES,
1501                                 MBO_TRANSITION_REJECT_REASON_UNSPECIFIED, 0,
1502                                 NULL);
1503                         return;
1504                 }
1505
1506                 wnm_sort_cand_list(wpa_s);
1507                 wnm_dump_cand_list(wpa_s);
1508                 valid_ms = valid_int * beacon_int * 128 / 125;
1509                 wpa_printf(MSG_DEBUG, "WNM: Candidate list valid for %u ms",
1510                            valid_ms);
1511                 os_get_reltime(&wpa_s->wnm_cand_valid_until);
1512                 wpa_s->wnm_cand_valid_until.sec += valid_ms / 1000;
1513                 wpa_s->wnm_cand_valid_until.usec += (valid_ms % 1000) * 1000;
1514                 wpa_s->wnm_cand_valid_until.sec +=
1515                         wpa_s->wnm_cand_valid_until.usec / 1000000;
1516                 wpa_s->wnm_cand_valid_until.usec %= 1000000;
1517                 os_memcpy(wpa_s->wnm_cand_from_bss, wpa_s->bssid, ETH_ALEN);
1518
1519                 /*
1520                  * Fetch the latest scan results from the kernel and check for
1521                  * candidates based on those results first. This can help in
1522                  * finding more up-to-date information should the driver has
1523                  * done some internal scanning operations after the last scan
1524                  * result update in wpa_supplicant.
1525                  */
1526                 if (wnm_fetch_scan_results(wpa_s) > 0)
1527                         return;
1528
1529                 /*
1530                  * Try to use previously received scan results, if they are
1531                  * recent enough to use for a connection.
1532                  */
1533                 if (wpa_s->last_scan_res_used > 0) {
1534                         struct os_reltime now;
1535
1536                         os_get_reltime(&now);
1537                         if (!os_reltime_expired(&now, &wpa_s->last_scan, 10)) {
1538                                 wpa_printf(MSG_DEBUG,
1539                                            "WNM: Try to use recent scan results");
1540                                 if (wnm_scan_process(wpa_s, 0) > 0)
1541                                         return;
1542                                 wpa_printf(MSG_DEBUG,
1543                                            "WNM: No match in previous scan results - try a new scan");
1544                         }
1545                 }
1546
1547                 wnm_set_scan_freqs(wpa_s);
1548                 if (wpa_s->wnm_num_neighbor_report == 1) {
1549                         os_memcpy(wpa_s->next_scan_bssid,
1550                                   wpa_s->wnm_neighbor_report_elements[0].bssid,
1551                                   ETH_ALEN);
1552                         wpa_printf(MSG_DEBUG,
1553                                    "WNM: Scan only for a specific BSSID since there is only a single candidate "
1554                                    MACSTR, MAC2STR(wpa_s->next_scan_bssid));
1555                 }
1556                 wpa_supplicant_req_scan(wpa_s, 0, 0);
1557         } else if (reply) {
1558                 enum bss_trans_mgmt_status_code status;
1559                 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_ESS_DISASSOC_IMMINENT)
1560                         status = WNM_BSS_TM_ACCEPT;
1561                 else {
1562                         wpa_msg(wpa_s, MSG_INFO, "WNM: BSS Transition Management Request did not include candidates");
1563                         status = WNM_BSS_TM_REJECT_UNSPECIFIED;
1564                 }
1565                 wnm_send_bss_transition_mgmt_resp(
1566                         wpa_s, wpa_s->wnm_dialog_token, status,
1567                         MBO_TRANSITION_REJECT_REASON_UNSPECIFIED, 0, NULL);
1568         }
1569 }
1570
1571
1572 #define BTM_QUERY_MIN_SIZE      4
1573
1574 int wnm_send_bss_transition_mgmt_query(struct wpa_supplicant *wpa_s,
1575                                        u8 query_reason,
1576                                        const char *btm_candidates,
1577                                        int cand_list)
1578 {
1579         struct wpabuf *buf;
1580         int ret;
1581
1582         wpa_printf(MSG_DEBUG, "WNM: Send BSS Transition Management Query to "
1583                    MACSTR " query_reason=%u%s",
1584                    MAC2STR(wpa_s->bssid), query_reason,
1585                    cand_list ? " candidate list" : "");
1586
1587         buf = wpabuf_alloc(BTM_QUERY_MIN_SIZE);
1588         if (!buf)
1589                 return -1;
1590
1591         wpabuf_put_u8(buf, WLAN_ACTION_WNM);
1592         wpabuf_put_u8(buf, WNM_BSS_TRANS_MGMT_QUERY);
1593         wpabuf_put_u8(buf, 1);
1594         wpabuf_put_u8(buf, query_reason);
1595
1596         if (cand_list)
1597                 wnm_add_cand_list(wpa_s, &buf);
1598
1599         if (btm_candidates) {
1600                 const size_t max_len = 1000;
1601
1602                 ret = wpabuf_resize(&buf, max_len);
1603                 if (ret < 0) {
1604                         wpabuf_free(buf);
1605                         return ret;
1606                 }
1607
1608                 ret = ieee802_11_parse_candidate_list(btm_candidates,
1609                                                       wpabuf_put(buf, 0),
1610                                                       max_len);
1611                 if (ret < 0) {
1612                         wpabuf_free(buf);
1613                         return ret;
1614                 }
1615
1616                 wpabuf_put(buf, ret);
1617         }
1618
1619         ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1620                                   wpa_s->own_addr, wpa_s->bssid,
1621                                   wpabuf_head_u8(buf), wpabuf_len(buf), 0);
1622
1623         wpabuf_free(buf);
1624         return ret;
1625 }
1626
1627
1628 static void ieee802_11_rx_wnm_notif_req_wfa(struct wpa_supplicant *wpa_s,
1629                                             const u8 *sa, const u8 *data,
1630                                             int len)
1631 {
1632         const u8 *pos, *end, *next;
1633         u8 ie, ie_len;
1634
1635         pos = data;
1636         end = data + len;
1637
1638         while (end - pos > 1) {
1639                 ie = *pos++;
1640                 ie_len = *pos++;
1641                 wpa_printf(MSG_DEBUG, "WNM: WFA subelement %u len %u",
1642                            ie, ie_len);
1643                 if (ie_len > end - pos) {
1644                         wpa_printf(MSG_DEBUG, "WNM: Not enough room for "
1645                                    "subelement");
1646                         break;
1647                 }
1648                 next = pos + ie_len;
1649                 if (ie_len < 4) {
1650                         pos = next;
1651                         continue;
1652                 }
1653                 wpa_printf(MSG_DEBUG, "WNM: Subelement OUI %06x type %u",
1654                            WPA_GET_BE24(pos), pos[3]);
1655
1656 #ifdef CONFIG_HS20
1657                 if (ie == WLAN_EID_VENDOR_SPECIFIC && ie_len >= 5 &&
1658                     WPA_GET_BE24(pos) == OUI_WFA &&
1659                     pos[3] == HS20_WNM_SUB_REM_NEEDED) {
1660                         /* Subscription Remediation subelement */
1661                         const u8 *ie_end;
1662                         u8 url_len;
1663                         char *url;
1664                         u8 osu_method;
1665
1666                         wpa_printf(MSG_DEBUG, "WNM: Subscription Remediation "
1667                                    "subelement");
1668                         ie_end = pos + ie_len;
1669                         pos += 4;
1670                         url_len = *pos++;
1671                         if (url_len == 0) {
1672                                 wpa_printf(MSG_DEBUG, "WNM: No Server URL included");
1673                                 url = NULL;
1674                                 osu_method = 1;
1675                         } else {
1676                                 if (url_len + 1 > ie_end - pos) {
1677                                         wpa_printf(MSG_DEBUG, "WNM: Not enough room for Server URL (len=%u) and Server Method (left %d)",
1678                                                    url_len,
1679                                                    (int) (ie_end - pos));
1680                                         break;
1681                                 }
1682                                 url = os_malloc(url_len + 1);
1683                                 if (url == NULL)
1684                                         break;
1685                                 os_memcpy(url, pos, url_len);
1686                                 url[url_len] = '\0';
1687                                 osu_method = pos[url_len];
1688                         }
1689                         hs20_rx_subscription_remediation(wpa_s, url,
1690                                                          osu_method);
1691                         os_free(url);
1692                         pos = next;
1693                         continue;
1694                 }
1695
1696                 if (ie == WLAN_EID_VENDOR_SPECIFIC && ie_len >= 8 &&
1697                     WPA_GET_BE24(pos) == OUI_WFA &&
1698                     pos[3] == HS20_WNM_DEAUTH_IMMINENT_NOTICE) {
1699                         const u8 *ie_end;
1700                         u8 url_len;
1701                         char *url;
1702                         u8 code;
1703                         u16 reauth_delay;
1704
1705                         ie_end = pos + ie_len;
1706                         pos += 4;
1707                         code = *pos++;
1708                         reauth_delay = WPA_GET_LE16(pos);
1709                         pos += 2;
1710                         url_len = *pos++;
1711                         wpa_printf(MSG_DEBUG, "WNM: HS 2.0 Deauthentication "
1712                                    "Imminent - Reason Code %u   "
1713                                    "Re-Auth Delay %u  URL Length %u",
1714                                    code, reauth_delay, url_len);
1715                         if (url_len > ie_end - pos)
1716                                 break;
1717                         url = os_malloc(url_len + 1);
1718                         if (url == NULL)
1719                                 break;
1720                         os_memcpy(url, pos, url_len);
1721                         url[url_len] = '\0';
1722                         hs20_rx_deauth_imminent_notice(wpa_s, code,
1723                                                        reauth_delay, url);
1724                         os_free(url);
1725                         pos = next;
1726                         continue;
1727                 }
1728
1729                 if (ie == WLAN_EID_VENDOR_SPECIFIC && ie_len >= 5 &&
1730                     WPA_GET_BE24(pos) == OUI_WFA &&
1731                     pos[3] == HS20_WNM_T_C_ACCEPTANCE) {
1732                         const u8 *ie_end;
1733                         u8 url_len;
1734                         char *url;
1735
1736                         ie_end = pos + ie_len;
1737                         pos += 4;
1738                         url_len = *pos++;
1739                         wpa_printf(MSG_DEBUG,
1740                                    "WNM: HS 2.0 Terms and Conditions Acceptance (URL Length %u)",
1741                                    url_len);
1742                         if (url_len > ie_end - pos)
1743                                 break;
1744                         url = os_malloc(url_len + 1);
1745                         if (!url)
1746                                 break;
1747                         os_memcpy(url, pos, url_len);
1748                         url[url_len] = '\0';
1749                         hs20_rx_t_c_acceptance(wpa_s, url);
1750                         os_free(url);
1751                         pos = next;
1752                         continue;
1753                 }
1754 #endif /* CONFIG_HS20 */
1755
1756                 pos = next;
1757         }
1758 }
1759
1760
1761 static void ieee802_11_rx_wnm_notif_req(struct wpa_supplicant *wpa_s,
1762                                         const u8 *sa, const u8 *frm, int len)
1763 {
1764         const u8 *pos, *end;
1765         u8 dialog_token, type;
1766
1767         /* Dialog Token [1] | Type [1] | Subelements */
1768
1769         if (len < 2 || sa == NULL)
1770                 return;
1771         end = frm + len;
1772         pos = frm;
1773         dialog_token = *pos++;
1774         type = *pos++;
1775
1776         wpa_dbg(wpa_s, MSG_DEBUG, "WNM: Received WNM-Notification Request "
1777                 "(dialog_token %u type %u sa " MACSTR ")",
1778                 dialog_token, type, MAC2STR(sa));
1779         wpa_hexdump(MSG_DEBUG, "WNM-Notification Request subelements",
1780                     pos, end - pos);
1781
1782         if (wpa_s->wpa_state != WPA_COMPLETED ||
1783             os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0) {
1784                 wpa_dbg(wpa_s, MSG_DEBUG, "WNM: WNM-Notification frame not "
1785                         "from our AP - ignore it");
1786                 return;
1787         }
1788
1789         switch (type) {
1790         case 1:
1791                 ieee802_11_rx_wnm_notif_req_wfa(wpa_s, sa, pos, end - pos);
1792                 break;
1793         default:
1794                 wpa_dbg(wpa_s, MSG_DEBUG, "WNM: Ignore unknown "
1795                         "WNM-Notification type %u", type);
1796                 break;
1797         }
1798 }
1799
1800
1801 static void ieee802_11_rx_wnm_coloc_intf_req(struct wpa_supplicant *wpa_s,
1802                                              const u8 *sa, const u8 *frm,
1803                                              int len)
1804 {
1805         u8 dialog_token, req_info, auto_report, timeout;
1806
1807         if (!wpa_s->conf->coloc_intf_reporting)
1808                 return;
1809
1810         /* Dialog Token [1] | Request Info [1] */
1811
1812         if (len < 2)
1813                 return;
1814         dialog_token = frm[0];
1815         req_info = frm[1];
1816         auto_report = req_info & 0x03;
1817         timeout = req_info >> 2;
1818
1819         wpa_dbg(wpa_s, MSG_DEBUG,
1820                 "WNM: Received Collocated Interference Request (dialog_token %u auto_report %u timeout %u sa " MACSTR ")",
1821                 dialog_token, auto_report, timeout, MAC2STR(sa));
1822
1823         if (dialog_token == 0)
1824                 return; /* only nonzero values are used for request */
1825
1826         if (wpa_s->wpa_state != WPA_COMPLETED ||
1827             os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0) {
1828                 wpa_dbg(wpa_s, MSG_DEBUG,
1829                         "WNM: Collocated Interference Request frame not from current AP - ignore it");
1830                 return;
1831         }
1832
1833         wpa_msg(wpa_s, MSG_INFO, COLOC_INTF_REQ "%u %u %u",
1834                 dialog_token, auto_report, timeout);
1835         wpa_s->coloc_intf_dialog_token = dialog_token;
1836         wpa_s->coloc_intf_auto_report = auto_report;
1837         wpa_s->coloc_intf_timeout = timeout;
1838 }
1839
1840
1841 void ieee802_11_rx_wnm_action(struct wpa_supplicant *wpa_s,
1842                               const struct ieee80211_mgmt *mgmt, size_t len)
1843 {
1844         const u8 *pos, *end;
1845         u8 act;
1846
1847         if (len < IEEE80211_HDRLEN + 2)
1848                 return;
1849
1850         pos = ((const u8 *) mgmt) + IEEE80211_HDRLEN + 1;
1851         act = *pos++;
1852         end = ((const u8 *) mgmt) + len;
1853
1854         wpa_printf(MSG_DEBUG, "WNM: RX action %u from " MACSTR,
1855                    act, MAC2STR(mgmt->sa));
1856         if (wpa_s->wpa_state < WPA_ASSOCIATED ||
1857             os_memcmp(mgmt->sa, wpa_s->bssid, ETH_ALEN) != 0) {
1858                 wpa_printf(MSG_DEBUG, "WNM: Ignore unexpected WNM Action "
1859                            "frame");
1860                 return;
1861         }
1862
1863         switch (act) {
1864         case WNM_BSS_TRANS_MGMT_REQ:
1865                 ieee802_11_rx_bss_trans_mgmt_req(wpa_s, pos, end,
1866                                                  !(mgmt->da[0] & 0x01));
1867                 break;
1868         case WNM_SLEEP_MODE_RESP:
1869                 ieee802_11_rx_wnmsleep_resp(wpa_s, pos, end - pos);
1870                 break;
1871         case WNM_NOTIFICATION_REQ:
1872                 ieee802_11_rx_wnm_notif_req(wpa_s, mgmt->sa, pos, end - pos);
1873                 break;
1874         case WNM_COLLOCATED_INTERFERENCE_REQ:
1875                 ieee802_11_rx_wnm_coloc_intf_req(wpa_s, mgmt->sa, pos,
1876                                                  end - pos);
1877                 break;
1878         default:
1879                 wpa_printf(MSG_ERROR, "WNM: Unknown request");
1880                 break;
1881         }
1882 }
1883
1884
1885 int wnm_send_coloc_intf_report(struct wpa_supplicant *wpa_s, u8 dialog_token,
1886                                const struct wpabuf *elems)
1887 {
1888         struct wpabuf *buf;
1889         int ret;
1890
1891         if (wpa_s->wpa_state < WPA_ASSOCIATED || !elems)
1892                 return -1;
1893
1894         wpa_printf(MSG_DEBUG, "WNM: Send Collocated Interference Report to "
1895                    MACSTR " (dialog token %u)",
1896                    MAC2STR(wpa_s->bssid), dialog_token);
1897
1898         buf = wpabuf_alloc(3 + wpabuf_len(elems));
1899         if (!buf)
1900                 return -1;
1901
1902         wpabuf_put_u8(buf, WLAN_ACTION_WNM);
1903         wpabuf_put_u8(buf, WNM_COLLOCATED_INTERFERENCE_REPORT);
1904         wpabuf_put_u8(buf, dialog_token);
1905         wpabuf_put_buf(buf, elems);
1906
1907         ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
1908                                   wpa_s->own_addr, wpa_s->bssid,
1909                                   wpabuf_head_u8(buf), wpabuf_len(buf), 0);
1910         wpabuf_free(buf);
1911         return ret;
1912 }
1913
1914
1915 void wnm_set_coloc_intf_elems(struct wpa_supplicant *wpa_s,
1916                               struct wpabuf *elems)
1917 {
1918         wpabuf_free(wpa_s->coloc_intf_elems);
1919         if (elems && wpabuf_len(elems) == 0) {
1920                 wpabuf_free(elems);
1921                 elems = NULL;
1922         }
1923         wpa_s->coloc_intf_elems = elems;
1924
1925         if (wpa_s->conf->coloc_intf_reporting && wpa_s->coloc_intf_elems &&
1926             wpa_s->coloc_intf_dialog_token &&
1927             (wpa_s->coloc_intf_auto_report == 1 ||
1928              wpa_s->coloc_intf_auto_report == 3)) {
1929                 /* TODO: Check that there has not been less than
1930                  * wpa_s->coloc_intf_timeout * 200 TU from the last report.
1931                  */
1932                 wnm_send_coloc_intf_report(wpa_s,
1933                                            wpa_s->coloc_intf_dialog_token,
1934                                            wpa_s->coloc_intf_elems);
1935         }
1936 }
1937
1938
1939 void wnm_clear_coloc_intf_reporting(struct wpa_supplicant *wpa_s)
1940 {
1941 #ifdef CONFIG_WNM
1942         wpa_s->coloc_intf_dialog_token = 0;
1943         wpa_s->coloc_intf_auto_report = 0;
1944 #endif /* CONFIG_WNM */
1945 }