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, const u8 *buf, u16 buf_len,
  41                                    enum wnm_oper oper)
  42 {
  43         u16 len = buf_len;
  44
  45         wpa_printf(MSG_DEBUG, "%s: TFS set operation %d", __func__, oper);
  46
  47         return wpa_drv_wnm_oper(wpa_s, oper, addr, (u8 *) buf, &len);
  48 }
  49
  50
  51 /* MLME-SLEEPMODE.request */
  52 int ieee802_11_send_wnmsleep_req(struct wpa_supplicant *wpa_s,
  53                                  u8 action, u16 intval, struct wpabuf *tfs_req)
  54 {
  55         struct ieee80211_mgmt *mgmt;
  56         int res;
  57         size_t len;
  58         struct wnm_sleep_element *wnmsleep_ie;
  59         u8 *wnmtfs_ie;
  60         u8 wnmsleep_ie_len;
  61         u16 wnmtfs_ie_len;  /* possibly multiple IE(s) */
  62         enum wnm_oper tfs_oper = action == 0 ? WNM_SLEEP_TFS_REQ_IE_ADD :
  63                 WNM_SLEEP_TFS_REQ_IE_NONE;
  64
  65         wpa_printf(MSG_DEBUG, "WNM: Request to send WNM-Sleep Mode Request "
  66                    "action=%s to " MACSTR,
  67                    action == 0 ? "enter" : "exit",
  68                    MAC2STR(wpa_s->bssid));
  69
  70         /* WNM-Sleep Mode IE */
  71         wnmsleep_ie_len = sizeof(struct wnm_sleep_element);
  72         wnmsleep_ie = os_zalloc(sizeof(struct wnm_sleep_element));
  73         if (wnmsleep_ie == NULL)
  74                 return -1;
  75         wnmsleep_ie->eid = WLAN_EID_WNMSLEEP;
  76         wnmsleep_ie->len = wnmsleep_ie_len - 2;
  77         wnmsleep_ie->action_type = action;
  78         wnmsleep_ie->status = WNM_STATUS_SLEEP_ACCEPT;
  79         wnmsleep_ie->intval = host_to_le16(intval);
  80         wpa_hexdump(MSG_DEBUG, "WNM: WNM-Sleep Mode element",
  81                     (u8 *) wnmsleep_ie, wnmsleep_ie_len);
  82
  83         /* TFS IE(s) */
  84         if (tfs_req) {
  85                 wnmtfs_ie_len = wpabuf_len(tfs_req);
  86                 wnmtfs_ie = os_malloc(wnmtfs_ie_len);
  87                 if (wnmtfs_ie == NULL) {
  88                         os_free(wnmsleep_ie);
  89                         return -1;
  90                 }
  91                 os_memcpy(wnmtfs_ie, wpabuf_head(tfs_req), wnmtfs_ie_len);
  92         } else {
  93                 wnmtfs_ie = os_zalloc(MAX_TFS_IE_LEN);
  94                 if (wnmtfs_ie == NULL) {
  95                         os_free(wnmsleep_ie);
  96                         return -1;
  97                 }
  98                 if (ieee80211_11_get_tfs_ie(wpa_s, wnmtfs_ie, &wnmtfs_ie_len,
  99                                             tfs_oper)) {
 100                         wnmtfs_ie_len = 0;
 101                         os_free(wnmtfs_ie);
 102                         wnmtfs_ie = NULL;
 103                 }
 104         }
 105         wpa_hexdump(MSG_DEBUG, "WNM: TFS Request element",
 106                     (u8 *) wnmtfs_ie, wnmtfs_ie_len);
 107
 108         mgmt = os_zalloc(sizeof(*mgmt) + wnmsleep_ie_len + wnmtfs_ie_len);
 109         if (mgmt == NULL) {
 110                 wpa_printf(MSG_DEBUG, "MLME: Failed to allocate buffer for "
 111                            "WNM-Sleep Request action frame");
 112                 os_free(wnmsleep_ie);
 113                 os_free(wnmtfs_ie);
 114                 return -1;
 115         }
 116
 117         os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
 118         os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
 119         os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
 120         mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 121                                            WLAN_FC_STYPE_ACTION);
 122         mgmt->u.action.category = WLAN_ACTION_WNM;
 123         mgmt->u.action.u.wnm_sleep_req.action = WNM_SLEEP_MODE_REQ;
 124         mgmt->u.action.u.wnm_sleep_req.dialogtoken = 1;
 125         os_memcpy(mgmt->u.action.u.wnm_sleep_req.variable, wnmsleep_ie,
 126                   wnmsleep_ie_len);
 127         /* copy TFS IE here */
 128         if (wnmtfs_ie_len > 0) {
 129                 os_memcpy(mgmt->u.action.u.wnm_sleep_req.variable +
 130                           wnmsleep_ie_len, wnmtfs_ie, wnmtfs_ie_len);
 131         }
 132
 133         len = 1 + sizeof(mgmt->u.action.u.wnm_sleep_req) + wnmsleep_ie_len +
 134                 wnmtfs_ie_len;
 135
 136         res = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
 137                                   wpa_s->own_addr, wpa_s->bssid,
 138                                   &mgmt->u.action.category, len, 0);
 139         if (res < 0)
 140                 wpa_printf(MSG_DEBUG, "Failed to send WNM-Sleep Request "
 141                            "(action=%d, intval=%d)", action, intval);
 142
 143         os_free(wnmsleep_ie);
 144         os_free(wnmtfs_ie);
 145         os_free(mgmt);
 146
 147         return res;
 148 }
 149
 150
 151 static void wnm_sleep_mode_enter_success(struct wpa_supplicant *wpa_s,
 152                                          const u8 *tfsresp_ie_start,
 153                                          const u8 *tfsresp_ie_end)
 154 {
 155         wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_ENTER_CONFIRM,
 156                          wpa_s->bssid, NULL, NULL);
 157         /* remove GTK/IGTK ?? */
 158
 159         /* set the TFS Resp IE(s) */
 160         if (tfsresp_ie_start && tfsresp_ie_end &&
 161             tfsresp_ie_end - tfsresp_ie_start >= 0) {
 162                 u16 tfsresp_ie_len;
 163                 tfsresp_ie_len = (tfsresp_ie_end + tfsresp_ie_end[1] + 2) -
 164                         tfsresp_ie_start;
 165                 wpa_printf(MSG_DEBUG, "TFS Resp IE(s) found");
 166                 /* pass the TFS Resp IE(s) to driver for processing */
 167                 if (ieee80211_11_set_tfs_ie(wpa_s, wpa_s->bssid,
 168                                             tfsresp_ie_start,
 169                                             tfsresp_ie_len,
 170                                             WNM_SLEEP_TFS_RESP_IE_SET))
 171                         wpa_printf(MSG_DEBUG, "WNM: Fail to set TFS Resp IE");
 172         }
 173 }
 174
 175
 176 static void wnm_sleep_mode_exit_success(struct wpa_supplicant *wpa_s,
 177                                         const u8 *frm, u16 key_len_total)
 178 {
 179         u8 *ptr, *end;
 180         u8 gtk_len;
 181
 182         wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_EXIT_CONFIRM,  wpa_s->bssid,
 183                          NULL, NULL);
 184
 185         /* Install GTK/IGTK */
 186
 187         /* point to key data field */
 188         ptr = (u8 *) frm + 1 + 2;
 189         end = ptr + key_len_total;
 190         wpa_hexdump_key(MSG_DEBUG, "WNM: Key Data", ptr, key_len_total);
 191
 192         while (end - ptr > 1) {
 193                 if (2 + ptr[1] > end - ptr) {
 194                         wpa_printf(MSG_DEBUG, "WNM: Invalid Key Data element "
 195                                    "length");
 196                         if (end > ptr) {
 197                                 wpa_hexdump(MSG_DEBUG, "WNM: Remaining data",
 198                                             ptr, end - ptr);
 199                         }
 200                         break;
 201                 }
 202                 if (*ptr == WNM_SLEEP_SUBELEM_GTK) {
 203                         if (ptr[1] < 11 + 5) {
 204                                 wpa_printf(MSG_DEBUG, "WNM: Too short GTK "
 205                                            "subelem");
 206                                 break;
 207                         }
 208                         gtk_len = *(ptr + 4);
 209                         if (ptr[1] < 11 + gtk_len ||
 210                             gtk_len < 5 || gtk_len > 32) {
 211                                 wpa_printf(MSG_DEBUG, "WNM: Invalid GTK "
 212                                            "subelem");
 213                                 break;
 214                         }
 215                         wpa_wnmsleep_install_key(
 216                                 wpa_s->wpa,
 217                                 WNM_SLEEP_SUBELEM_GTK,
 218                                 ptr);
 219                         ptr += 13 + gtk_len;
 220 #ifdef CONFIG_IEEE80211W
 221                 } else if (*ptr == WNM_SLEEP_SUBELEM_IGTK) {
 222                         if (ptr[1] < 2 + 6 + WPA_IGTK_LEN) {
 223                                 wpa_printf(MSG_DEBUG, "WNM: Too short IGTK "
 224                                            "subelem");
 225                                 break;
 226                         }
 227                         wpa_wnmsleep_install_key(wpa_s->wpa,
 228                                                  WNM_SLEEP_SUBELEM_IGTK, ptr);
 229                         ptr += 10 + WPA_IGTK_LEN;
 230 #endif /* CONFIG_IEEE80211W */
 231                 } else
 232                         break; /* skip the loop */
 233         }
 234 }
 235
 236
 237 static void ieee802_11_rx_wnmsleep_resp(struct wpa_supplicant *wpa_s,
 238                                         const u8 *frm, int len)
 239 {
 240         /*
 241          * Action [1] | Dialog Token [1] | Key Data Len [2] | Key Data |
 242          * WNM-Sleep Mode IE | TFS Response IE
 243          */
 244         const u8 *pos = frm; /* point to payload after the action field */
 245         u16 key_len_total;
 246         struct wnm_sleep_element *wnmsleep_ie = NULL;
 247         /* multiple TFS Resp IE (assuming consecutive) */
 248         const u8 *tfsresp_ie_start = NULL;
 249         const u8 *tfsresp_ie_end = NULL;
 250         size_t left;
 251
 252         if (len < 3)
 253                 return;
 254         key_len_total = WPA_GET_LE16(frm + 1);
 255
 256         wpa_printf(MSG_DEBUG, "WNM-Sleep Mode Response token=%u key_len_total=%d",
 257                    frm[0], key_len_total);
 258         left = len - 3;
 259         if (key_len_total > left) {
 260                 wpa_printf(MSG_INFO, "WNM: Too short frame for Key Data field");
 261                 return;
 262         }
 263         pos += 3 + key_len_total;
 264         while (pos - frm + 1 < len) {
 265                 u8 ie_len = *(pos + 1);
 266                 if (2 + ie_len > frm + len - pos) {
 267                         wpa_printf(MSG_INFO, "WNM: Invalid IE len %u", ie_len);
 268                         break;
 269                 }
 270                 wpa_hexdump(MSG_DEBUG, "WNM: Element", pos, 2 + ie_len);
 271                 if (*pos == WLAN_EID_WNMSLEEP && ie_len >= 4)
 272                         wnmsleep_ie = (struct wnm_sleep_element *) pos;
 273                 else if (*pos == WLAN_EID_TFS_RESP) {
 274                         if (!tfsresp_ie_start)
 275                                 tfsresp_ie_start = pos;
 276                         tfsresp_ie_end = pos;
 277                 } else
 278                         wpa_printf(MSG_DEBUG, "EID %d not recognized", *pos);
 279                 pos += ie_len + 2;
 280         }
 281
 282         if (!wnmsleep_ie) {
 283                 wpa_printf(MSG_DEBUG, "No WNM-Sleep IE found");
 284                 return;
 285         }
 286
 287         if (wnmsleep_ie->status == WNM_STATUS_SLEEP_ACCEPT ||
 288             wnmsleep_ie->status == WNM_STATUS_SLEEP_EXIT_ACCEPT_GTK_UPDATE) {
 289                 wpa_printf(MSG_DEBUG, "Successfully recv WNM-Sleep Response "
 290                            "frame (action=%d, intval=%d)",
 291                            wnmsleep_ie->action_type, wnmsleep_ie->intval);
 292                 if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_ENTER) {
 293                         wnm_sleep_mode_enter_success(wpa_s, tfsresp_ie_start,
 294                                                      tfsresp_ie_end);
 295                 } else if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT) {
 296                         wnm_sleep_mode_exit_success(wpa_s, frm, key_len_total);
 297                 }
 298         } else {
 299                 wpa_printf(MSG_DEBUG, "Reject recv WNM-Sleep Response frame "
 300                            "(action=%d, intval=%d)",
 301                            wnmsleep_ie->action_type, wnmsleep_ie->intval);
 302                 if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_ENTER)
 303                         wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_ENTER_FAIL,
 304                                          wpa_s->bssid, NULL, NULL);
 305                 else if (wnmsleep_ie->action_type == WNM_SLEEP_MODE_EXIT)
 306                         wpa_drv_wnm_oper(wpa_s, WNM_SLEEP_EXIT_FAIL,
 307                                          wpa_s->bssid, NULL, NULL);
 308         }
 309 }
 310
 311
 312 void wnm_deallocate_memory(struct wpa_supplicant *wpa_s)
 313 {
 314         int i;
 315
 316         for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
 317                 os_free(wpa_s->wnm_neighbor_report_elements[i].meas_pilot);
 318                 os_free(wpa_s->wnm_neighbor_report_elements[i].mul_bssid);
 319         }
 320
 321         wpa_s->wnm_num_neighbor_report = 0;
 322         os_free(wpa_s->wnm_neighbor_report_elements);
 323         wpa_s->wnm_neighbor_report_elements = NULL;
 324 }
 325
 326
 327 static void wnm_parse_neighbor_report_elem(struct neighbor_report *rep,
 328                                            u8 id, u8 elen, const u8 *pos)
 329 {
 330         switch (id) {
 331         case WNM_NEIGHBOR_TSF:
 332                 if (elen < 2 + 2) {
 333                         wpa_printf(MSG_DEBUG, "WNM: Too short TSF");
 334                         break;
 335                 }
 336                 rep->tsf_offset = WPA_GET_LE16(pos);
 337                 rep->beacon_int = WPA_GET_LE16(pos + 2);
 338                 rep->tsf_present = 1;
 339                 break;
 340         case WNM_NEIGHBOR_CONDENSED_COUNTRY_STRING:
 341                 if (elen < 2) {
 342                         wpa_printf(MSG_DEBUG, "WNM: Too short condensed "
 343                                    "country string");
 344                         break;
 345                 }
 346                 os_memcpy(rep->country, pos, 2);
 347                 rep->country_present = 1;
 348                 break;
 349         case WNM_NEIGHBOR_BSS_TRANSITION_CANDIDATE:
 350                 if (elen < 1) {
 351                         wpa_printf(MSG_DEBUG, "WNM: Too short BSS transition "
 352                                    "candidate");
 353                         break;
 354                 }
 355                 rep->preference = pos[0];
 356                 rep->preference_present = 1;
 357                 break;
 358         case WNM_NEIGHBOR_BSS_TERMINATION_DURATION:
 359                 rep->bss_term_tsf = WPA_GET_LE64(pos);
 360                 rep->bss_term_dur = WPA_GET_LE16(pos + 8);
 361                 rep->bss_term_present = 1;
 362                 break;
 363         case WNM_NEIGHBOR_BEARING:
 364                 if (elen < 8) {
 365                         wpa_printf(MSG_DEBUG, "WNM: Too short neighbor "
 366                                    "bearing");
 367                         break;
 368                 }
 369                 rep->bearing = WPA_GET_LE16(pos);
 370                 rep->distance = WPA_GET_LE32(pos + 2);
 371                 rep->rel_height = WPA_GET_LE16(pos + 2 + 4);
 372                 rep->bearing_present = 1;
 373                 break;
 374         case WNM_NEIGHBOR_MEASUREMENT_PILOT:
 375                 if (elen < 1) {
 376                         wpa_printf(MSG_DEBUG, "WNM: Too short measurement "
 377                                    "pilot");
 378                         break;
 379                 }
 380                 os_free(rep->meas_pilot);
 381                 rep->meas_pilot = os_zalloc(sizeof(struct measurement_pilot));
 382                 if (rep->meas_pilot == NULL)
 383                         break;
 384                 rep->meas_pilot->measurement_pilot = pos[0];
 385                 rep->meas_pilot->subelem_len = elen - 1;
 386                 os_memcpy(rep->meas_pilot->subelems, pos + 1, elen - 1);
 387                 break;
 388         case WNM_NEIGHBOR_RRM_ENABLED_CAPABILITIES:
 389                 if (elen < 5) {
 390                         wpa_printf(MSG_DEBUG, "WNM: Too short RRM enabled "
 391                                    "capabilities");
 392                         break;
 393                 }
 394                 os_memcpy(rep->rm_capab, pos, 5);
 395                 rep->rm_capab_present = 1;
 396                 break;
 397         case WNM_NEIGHBOR_MULTIPLE_BSSID:
 398                 if (elen < 1) {
 399                         wpa_printf(MSG_DEBUG, "WNM: Too short multiple BSSID");
 400                         break;
 401                 }
 402                 os_free(rep->mul_bssid);
 403                 rep->mul_bssid = os_zalloc(sizeof(struct multiple_bssid));
 404                 if (rep->mul_bssid == NULL)
 405                         break;
 406                 rep->mul_bssid->max_bssid_indicator = pos[0];
 407                 rep->mul_bssid->subelem_len = elen - 1;
 408                 os_memcpy(rep->mul_bssid->subelems, pos + 1, elen - 1);
 409                 break;
 410         }
 411 }
 412
 413
 414 static int wnm_nei_get_chan(struct wpa_supplicant *wpa_s, u8 op_class, u8 chan)
 415 {
 416         struct wpa_bss *bss = wpa_s->current_bss;
 417         const char *country = NULL;
 418
 419         if (bss) {
 420                 const u8 *elem = wpa_bss_get_ie(bss, WLAN_EID_COUNTRY);
 421
 422                 if (elem && elem[1] >= 2)
 423                         country = (const char *) (elem + 2);
 424         }
 425
 426         return ieee80211_chan_to_freq(country, op_class, chan);
 427 }
 428
 429
 430 static void wnm_parse_neighbor_report(struct wpa_supplicant *wpa_s,
 431                                       const u8 *pos, u8 len,
 432                                       struct neighbor_report *rep)
 433 {
 434         u8 left = len;
 435
 436         if (left < 13) {
 437                 wpa_printf(MSG_DEBUG, "WNM: Too short neighbor report");
 438                 return;
 439         }
 440
 441         os_memcpy(rep->bssid, pos, ETH_ALEN);
 442         rep->bssid_info = WPA_GET_LE32(pos + ETH_ALEN);
 443         rep->regulatory_class = *(pos + 10);
 444         rep->channel_number = *(pos + 11);
 445         rep->phy_type = *(pos + 12);
 446
 447         pos += 13;
 448         left -= 13;
 449
 450         while (left >= 2) {
 451                 u8 id, elen;
 452
 453                 id = *pos++;
 454                 elen = *pos++;
 455                 wpa_printf(MSG_DEBUG, "WNM: Subelement id=%u len=%u", id, elen);
 456                 left -= 2;
 457                 if (elen > left) {
 458                         wpa_printf(MSG_DEBUG,
 459                                    "WNM: Truncated neighbor report subelement");
 460                         break;
 461                 }
 462                 wnm_parse_neighbor_report_elem(rep, id, elen, pos);
 463                 left -= elen;
 464                 pos += elen;
 465         }
 466
 467         rep->freq = wnm_nei_get_chan(wpa_s, rep->regulatory_class,
 468                                      rep->channel_number);
 469 }
 470
 471
 472 static struct wpa_bss *
 473 compare_scan_neighbor_results(struct wpa_supplicant *wpa_s)
 474 {
 475
 476         u8 i;
 477         struct wpa_bss *bss = wpa_s->current_bss;
 478         struct wpa_bss *target;
 479
 480         if (!bss)
 481                 return 0;
 482
 483         wpa_printf(MSG_DEBUG, "WNM: Current BSS " MACSTR " RSSI %d",
 484                    MAC2STR(wpa_s->bssid), bss->level);
 485
 486         for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
 487                 struct neighbor_report *nei;
 488
 489                 nei = &wpa_s->wnm_neighbor_report_elements[i];
 490                 if (nei->preference_present && nei->preference == 0) {
 491                         wpa_printf(MSG_DEBUG, "Skip excluded BSS " MACSTR,
 492                                    MAC2STR(nei->bssid));
 493                         continue;
 494                 }
 495
 496                 target = wpa_bss_get_bssid(wpa_s, nei->bssid);
 497                 if (!target) {
 498                         wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
 499                                    " (pref %d) not found in scan results",
 500                                    MAC2STR(nei->bssid),
 501                                    nei->preference_present ? nei->preference :
 502                                    -1);
 503                         continue;
 504                 }
 505
 506                 if (bss->ssid_len != target->ssid_len ||
 507                     os_memcmp(bss->ssid, target->ssid, bss->ssid_len) != 0) {
 508                         /*
 509                          * TODO: Could consider allowing transition to another
 510                          * ESS if PMF was enabled for the association.
 511                          */
 512                         wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
 513                                    " (pref %d) in different ESS",
 514                                    MAC2STR(nei->bssid),
 515                                    nei->preference_present ? nei->preference :
 516                                    -1);
 517                         continue;
 518                 }
 519
 520                 if (target->level < bss->level && target->level < -80) {
 521                         wpa_printf(MSG_DEBUG, "Candidate BSS " MACSTR
 522                                    " (pref %d) does not have sufficient signal level (%d)",
 523                                    MAC2STR(nei->bssid),
 524                                    nei->preference_present ? nei->preference :
 525                                    -1,
 526                                    target->level);
 527                         continue;
 528                 }
 529
 530                 wpa_printf(MSG_DEBUG,
 531                            "WNM: Found an acceptable preferred transition candidate BSS "
 532                            MACSTR " (RSSI %d)",
 533                            MAC2STR(nei->bssid), target->level);
 534                 return target;
 535         }
 536
 537         return NULL;
 538 }
 539
 540
 541 static void wnm_send_bss_transition_mgmt_resp(
 542         struct wpa_supplicant *wpa_s, u8 dialog_token,
 543         enum bss_trans_mgmt_status_code status, u8 delay,
 544         const u8 *target_bssid)
 545 {
 546         u8 buf[1000], *pos;
 547         struct ieee80211_mgmt *mgmt;
 548         size_t len;
 549         int res;
 550
 551         wpa_printf(MSG_DEBUG, "WNM: Send BSS Transition Management Response "
 552                    "to " MACSTR " dialog_token=%u status=%u delay=%d",
 553                    MAC2STR(wpa_s->bssid), dialog_token, status, delay);
 554         if (!wpa_s->current_bss) {
 555                 wpa_printf(MSG_DEBUG,
 556                            "WNM: Current BSS not known - drop response");
 557                 return;
 558         }
 559
 560         mgmt = (struct ieee80211_mgmt *) buf;
 561         os_memset(&buf, 0, sizeof(buf));
 562         os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
 563         os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
 564         os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
 565         mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 566                                            WLAN_FC_STYPE_ACTION);
 567         mgmt->u.action.category = WLAN_ACTION_WNM;
 568         mgmt->u.action.u.bss_tm_resp.action = WNM_BSS_TRANS_MGMT_RESP;
 569         mgmt->u.action.u.bss_tm_resp.dialog_token = dialog_token;
 570         mgmt->u.action.u.bss_tm_resp.status_code = status;
 571         mgmt->u.action.u.bss_tm_resp.bss_termination_delay = delay;
 572         pos = mgmt->u.action.u.bss_tm_resp.variable;
 573         if (target_bssid) {
 574                 os_memcpy(pos, target_bssid, ETH_ALEN);
 575                 pos += ETH_ALEN;
 576         } else if (status == WNM_BSS_TM_ACCEPT) {
 577                 /*
 578                  * P802.11-REVmc clarifies that the Target BSSID field is always
 579                  * present when status code is zero, so use a fake value here if
 580                  * no BSSID is yet known.
 581                  */
 582                 os_memset(pos, 0, ETH_ALEN);
 583                 pos += ETH_ALEN;
 584         }
 585
 586         len = pos - (u8 *) &mgmt->u.action.category;
 587
 588         res = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
 589                                   wpa_s->own_addr, wpa_s->bssid,
 590                                   &mgmt->u.action.category, len, 0);
 591         if (res < 0) {
 592                 wpa_printf(MSG_DEBUG,
 593                            "WNM: Failed to send BSS Transition Management Response");
 594         }
 595 }
 596
 597
 598 int wnm_scan_process(struct wpa_supplicant *wpa_s, int reply_on_fail)
 599 {
 600         struct wpa_bss *bss;
 601         struct wpa_ssid *ssid = wpa_s->current_ssid;
 602         enum bss_trans_mgmt_status_code status = WNM_BSS_TM_REJECT_UNSPECIFIED;
 603
 604         if (!wpa_s->wnm_neighbor_report_elements)
 605                 return 0;
 606
 607         if (os_reltime_before(&wpa_s->wnm_cand_valid_until,
 608                               &wpa_s->scan_trigger_time)) {
 609                 wpa_printf(MSG_DEBUG, "WNM: Previously stored BSS transition candidate list is not valid anymore - drop it");
 610                 wnm_deallocate_memory(wpa_s);
 611                 return 0;
 612         }
 613
 614         if (!wpa_s->current_bss ||
 615             os_memcmp(wpa_s->wnm_cand_from_bss, wpa_s->current_bss->bssid,
 616                       ETH_ALEN) != 0) {
 617                 wpa_printf(MSG_DEBUG, "WNM: Stored BSS transition candidate list not from the current BSS - ignore it");
 618                 return 0;
 619         }
 620
 621         /* Compare the Neighbor Report and scan results */
 622         bss = compare_scan_neighbor_results(wpa_s);
 623         if (!bss) {
 624                 wpa_printf(MSG_DEBUG, "WNM: No BSS transition candidate match found");
 625                 status = WNM_BSS_TM_REJECT_NO_SUITABLE_CANDIDATES;
 626                 goto send_bss_resp_fail;
 627         }
 628
 629         /* Associate to the network */
 630         /* Send the BSS Management Response - Accept */
 631         if (wpa_s->wnm_reply) {
 632                 wpa_s->wnm_reply = 0;
 633                 wnm_send_bss_transition_mgmt_resp(wpa_s,
 634                                                   wpa_s->wnm_dialog_token,
 635                                                   WNM_BSS_TM_ACCEPT,
 636                                                   0, bss->bssid);
 637         }
 638
 639         if (bss == wpa_s->current_bss) {
 640                 wpa_printf(MSG_DEBUG,
 641                            "WNM: Already associated with the preferred candidate");
 642                 wnm_deallocate_memory(wpa_s);
 643                 return 1;
 644         }
 645
 646         wpa_s->reassociate = 1;
 647         wpa_supplicant_connect(wpa_s, bss, ssid);
 648         wnm_deallocate_memory(wpa_s);
 649         return 1;
 650
 651 send_bss_resp_fail:
 652         if (!reply_on_fail)
 653                 return 0;
 654
 655         /* Send reject response for all the failures */
 656
 657         if (wpa_s->wnm_reply) {
 658                 wpa_s->wnm_reply = 0;
 659                 wnm_send_bss_transition_mgmt_resp(wpa_s,
 660                                                   wpa_s->wnm_dialog_token,
 661                                                   status, 0, NULL);
 662         }
 663         wnm_deallocate_memory(wpa_s);
 664
 665         return 0;
 666 }
 667
 668
 669 static int cand_pref_compar(const void *a, const void *b)
 670 {
 671         const struct neighbor_report *aa = a;
 672         const struct neighbor_report *bb = b;
 673
 674         if (!aa->preference_present && !bb->preference_present)
 675                 return 0;
 676         if (!aa->preference_present)
 677                 return 1;
 678         if (!bb->preference_present)
 679                 return -1;
 680         if (bb->preference > aa->preference)
 681                 return 1;
 682         if (bb->preference < aa->preference)
 683                 return -1;
 684         return 0;
 685 }
 686
 687
 688 static void wnm_sort_cand_list(struct wpa_supplicant *wpa_s)
 689 {
 690         if (!wpa_s->wnm_neighbor_report_elements)
 691                 return;
 692         qsort(wpa_s->wnm_neighbor_report_elements,
 693               wpa_s->wnm_num_neighbor_report, sizeof(struct neighbor_report),
 694               cand_pref_compar);
 695 }
 696
 697
 698 static void wnm_dump_cand_list(struct wpa_supplicant *wpa_s)
 699 {
 700         unsigned int i;
 701
 702         wpa_printf(MSG_DEBUG, "WNM: BSS Transition Candidate List");
 703         if (!wpa_s->wnm_neighbor_report_elements)
 704                 return;
 705         for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
 706                 struct neighbor_report *nei;
 707
 708                 nei = &wpa_s->wnm_neighbor_report_elements[i];
 709                 wpa_printf(MSG_DEBUG, "%u: " MACSTR
 710                            " info=0x%x op_class=%u chan=%u phy=%u pref=%d freq=%d",
 711                            i, MAC2STR(nei->bssid), nei->bssid_info,
 712                            nei->regulatory_class,
 713                            nei->channel_number, nei->phy_type,
 714                            nei->preference_present ? nei->preference : -1,
 715                            nei->freq);
 716         }
 717 }
 718
 719
 720 static int chan_supported(struct wpa_supplicant *wpa_s, int freq)
 721 {
 722         unsigned int i;
 723
 724         for (i = 0; i < wpa_s->hw.num_modes; i++) {
 725                 struct hostapd_hw_modes *mode = &wpa_s->hw.modes[i];
 726                 int j;
 727
 728                 for (j = 0; j < mode->num_channels; j++) {
 729                         struct hostapd_channel_data *chan;
 730
 731                         chan = &mode->channels[j];
 732                         if (chan->freq == freq &&
 733                             !(chan->flag & HOSTAPD_CHAN_DISABLED))
 734                                 return 1;
 735                 }
 736         }
 737
 738         return 0;
 739 }
 740
 741
 742 static void wnm_set_scan_freqs(struct wpa_supplicant *wpa_s)
 743 {
 744         int *freqs;
 745         int num_freqs = 0;
 746         unsigned int i;
 747
 748         if (!wpa_s->wnm_neighbor_report_elements)
 749                 return;
 750
 751         if (wpa_s->hw.modes == NULL)
 752                 return;
 753
 754         os_free(wpa_s->next_scan_freqs);
 755         wpa_s->next_scan_freqs = NULL;
 756
 757         freqs = os_calloc(wpa_s->wnm_num_neighbor_report + 1, sizeof(int));
 758         if (freqs == NULL)
 759                 return;
 760
 761         for (i = 0; i < wpa_s->wnm_num_neighbor_report; i++) {
 762                 struct neighbor_report *nei;
 763
 764                 nei = &wpa_s->wnm_neighbor_report_elements[i];
 765                 if (nei->freq <= 0) {
 766                         wpa_printf(MSG_DEBUG,
 767                                    "WNM: Unknown neighbor operating frequency for "
 768                                    MACSTR " - scan all channels",
 769                                    MAC2STR(nei->bssid));
 770                         os_free(freqs);
 771                         return;
 772                 }
 773                 if (chan_supported(wpa_s, nei->freq))
 774                         add_freq(freqs, &num_freqs, nei->freq);
 775         }
 776
 777         if (num_freqs == 0) {
 778                 os_free(freqs);
 779                 return;
 780         }
 781
 782         wpa_printf(MSG_DEBUG,
 783                    "WNM: Scan %d frequencies based on transition candidate list",
 784                    num_freqs);
 785         wpa_s->next_scan_freqs = freqs;
 786 }
 787
 788
 789 static void ieee802_11_rx_bss_trans_mgmt_req(struct wpa_supplicant *wpa_s,
 790                                              const u8 *pos, const u8 *end,
 791                                              int reply)
 792 {
 793         unsigned int beacon_int;
 794         u8 valid_int;
 795
 796         if (end - pos < 5)
 797                 return;
 798
 799         if (wpa_s->current_bss)
 800                 beacon_int = wpa_s->current_bss->beacon_int;
 801         else
 802                 beacon_int = 100; /* best guess */
 803
 804         wpa_s->wnm_dialog_token = pos[0];
 805         wpa_s->wnm_mode = pos[1];
 806         wpa_s->wnm_dissoc_timer = WPA_GET_LE16(pos + 2);
 807         valid_int = pos[4];
 808         wpa_s->wnm_reply = reply;
 809
 810         wpa_printf(MSG_DEBUG, "WNM: BSS Transition Management Request: "
 811                    "dialog_token=%u request_mode=0x%x "
 812                    "disassoc_timer=%u validity_interval=%u",
 813                    wpa_s->wnm_dialog_token, wpa_s->wnm_mode,
 814                    wpa_s->wnm_dissoc_timer, valid_int);
 815
 816         pos += 5;
 817
 818         if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_BSS_TERMINATION_INCLUDED) {
 819                 if (end - pos < 12) {
 820                         wpa_printf(MSG_DEBUG, "WNM: Too short BSS TM Request");
 821                         return;
 822                 }
 823                 os_memcpy(wpa_s->wnm_bss_termination_duration, pos, 12);
 824                 pos += 12; /* BSS Termination Duration */
 825         }
 826
 827         if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_ESS_DISASSOC_IMMINENT) {
 828                 char url[256];
 829
 830                 if (end - pos < 1 || 1 + pos[0] > end - pos) {
 831                         wpa_printf(MSG_DEBUG, "WNM: Invalid BSS Transition "
 832                                    "Management Request (URL)");
 833                         return;
 834                 }
 835                 os_memcpy(url, pos + 1, pos[0]);
 836                 url[pos[0]] = '\0';
 837                 pos += 1 + pos[0];
 838
 839                 wpa_msg(wpa_s, MSG_INFO, ESS_DISASSOC_IMMINENT "%d %u %s",
 840                         wpa_sm_pmf_enabled(wpa_s->wpa),
 841                         wpa_s->wnm_dissoc_timer * beacon_int * 128 / 125, url);
 842         }
 843
 844         if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_DISASSOC_IMMINENT) {
 845                 wpa_msg(wpa_s, MSG_INFO, "WNM: Disassociation Imminent - "
 846                         "Disassociation Timer %u", wpa_s->wnm_dissoc_timer);
 847                 if (wpa_s->wnm_dissoc_timer && !wpa_s->scanning) {
 848                         /* TODO: mark current BSS less preferred for
 849                          * selection */
 850                         wpa_printf(MSG_DEBUG, "Trying to find another BSS");
 851                         wpa_supplicant_req_scan(wpa_s, 0, 0);
 852                 }
 853         }
 854
 855         if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_PREF_CAND_LIST_INCLUDED) {
 856                 unsigned int valid_ms;
 857
 858                 wpa_msg(wpa_s, MSG_INFO, "WNM: Preferred List Available");
 859                 wnm_deallocate_memory(wpa_s);
 860                 wpa_s->wnm_neighbor_report_elements = os_calloc(
 861                         WNM_MAX_NEIGHBOR_REPORT,
 862                         sizeof(struct neighbor_report));
 863                 if (wpa_s->wnm_neighbor_report_elements == NULL)
 864                         return;
 865
 866                 while (end - pos >= 2 &&
 867                        wpa_s->wnm_num_neighbor_report < WNM_MAX_NEIGHBOR_REPORT)
 868                 {
 869                         u8 tag = *pos++;
 870                         u8 len = *pos++;
 871
 872                         wpa_printf(MSG_DEBUG, "WNM: Neighbor report tag %u",
 873                                    tag);
 874                         if (len > end - pos) {
 875                                 wpa_printf(MSG_DEBUG, "WNM: Truncated request");
 876                                 return;
 877                         }
 878                         if (tag == WLAN_EID_NEIGHBOR_REPORT) {
 879                                 struct neighbor_report *rep;
 880                                 rep = &wpa_s->wnm_neighbor_report_elements[
 881                                         wpa_s->wnm_num_neighbor_report];
 882                                 wnm_parse_neighbor_report(wpa_s, pos, len, rep);
 883                         }
 884
 885                         pos += len;
 886                         wpa_s->wnm_num_neighbor_report++;
 887                 }
 888                 wnm_sort_cand_list(wpa_s);
 889                 wnm_dump_cand_list(wpa_s);
 890                 valid_ms = valid_int * beacon_int * 128 / 125;
 891                 wpa_printf(MSG_DEBUG, "WNM: Candidate list valid for %u ms",
 892                            valid_ms);
 893                 os_get_reltime(&wpa_s->wnm_cand_valid_until);
 894                 wpa_s->wnm_cand_valid_until.sec += valid_ms / 1000;
 895                 wpa_s->wnm_cand_valid_until.usec += (valid_ms % 1000) * 1000;
 896                 wpa_s->wnm_cand_valid_until.sec +=
 897                         wpa_s->wnm_cand_valid_until.usec / 1000000;
 898                 wpa_s->wnm_cand_valid_until.usec %= 1000000;
 899                 os_memcpy(wpa_s->wnm_cand_from_bss, wpa_s->bssid, ETH_ALEN);
 900
 901                 if (wpa_s->last_scan_res_used > 0) {
 902                         struct os_reltime now;
 903
 904                         os_get_reltime(&now);
 905                         if (!os_reltime_expired(&now, &wpa_s->last_scan, 10)) {
 906                                 wpa_printf(MSG_DEBUG,
 907                                            "WNM: Try to use recent scan results");
 908                                 if (wnm_scan_process(wpa_s, 0) > 0)
 909                                         return;
 910                                 wpa_printf(MSG_DEBUG,
 911                                            "WNM: No match in previous scan results - try a new scan");
 912                         }
 913                 }
 914
 915                 wnm_set_scan_freqs(wpa_s);
 916                 wpa_supplicant_req_scan(wpa_s, 0, 0);
 917         } else if (reply) {
 918                 enum bss_trans_mgmt_status_code status;
 919                 if (wpa_s->wnm_mode & WNM_BSS_TM_REQ_ESS_DISASSOC_IMMINENT)
 920                         status = WNM_BSS_TM_ACCEPT;
 921                 else {
 922                         wpa_msg(wpa_s, MSG_INFO, "WNM: BSS Transition Management Request did not include candidates");
 923                         status = WNM_BSS_TM_REJECT_UNSPECIFIED;
 924                 }
 925                 wnm_send_bss_transition_mgmt_resp(wpa_s,
 926                                                   wpa_s->wnm_dialog_token,
 927                                                   status, 0, NULL);
 928         }
 929 }
 930
 931
 932 int wnm_send_bss_transition_mgmt_query(struct wpa_supplicant *wpa_s,
 933                                        u8 query_reason)
 934 {
 935         u8 buf[1000], *pos;
 936         struct ieee80211_mgmt *mgmt;
 937         size_t len;
 938         int ret;
 939
 940         wpa_printf(MSG_DEBUG, "WNM: Send BSS Transition Management Query to "
 941                    MACSTR " query_reason=%u",
 942                    MAC2STR(wpa_s->bssid), query_reason);
 943
 944         mgmt = (struct ieee80211_mgmt *) buf;
 945         os_memset(&buf, 0, sizeof(buf));
 946         os_memcpy(mgmt->da, wpa_s->bssid, ETH_ALEN);
 947         os_memcpy(mgmt->sa, wpa_s->own_addr, ETH_ALEN);
 948         os_memcpy(mgmt->bssid, wpa_s->bssid, ETH_ALEN);
 949         mgmt->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
 950                                            WLAN_FC_STYPE_ACTION);
 951         mgmt->u.action.category = WLAN_ACTION_WNM;
 952         mgmt->u.action.u.bss_tm_query.action = WNM_BSS_TRANS_MGMT_QUERY;
 953         mgmt->u.action.u.bss_tm_query.dialog_token = 1;
 954         mgmt->u.action.u.bss_tm_query.query_reason = query_reason;
 955         pos = mgmt->u.action.u.bss_tm_query.variable;
 956
 957         len = pos - (u8 *) &mgmt->u.action.category;
 958
 959         ret = wpa_drv_send_action(wpa_s, wpa_s->assoc_freq, 0, wpa_s->bssid,
 960                                   wpa_s->own_addr, wpa_s->bssid,
 961                                   &mgmt->u.action.category, len, 0);
 962
 963         return ret;
 964 }
 965
 966
 967 static void ieee802_11_rx_wnm_notif_req_wfa(struct wpa_supplicant *wpa_s,
 968                                             const u8 *sa, const u8 *data,
 969                                             int len)
 970 {
 971         const u8 *pos, *end, *next;
 972         u8 ie, ie_len;
 973
 974         pos = data;
 975         end = data + len;
 976
 977         while (end - pos > 1) {
 978                 ie = *pos++;
 979                 ie_len = *pos++;
 980                 wpa_printf(MSG_DEBUG, "WNM: WFA subelement %u len %u",
 981                            ie, ie_len);
 982                 if (ie_len > end - pos) {
 983                         wpa_printf(MSG_DEBUG, "WNM: Not enough room for "
 984                                    "subelement");
 985                         break;
 986                 }
 987                 next = pos + ie_len;
 988                 if (ie_len < 4) {
 989                         pos = next;
 990                         continue;
 991                 }
 992                 wpa_printf(MSG_DEBUG, "WNM: Subelement OUI %06x type %u",
 993                            WPA_GET_BE24(pos), pos[3]);
 994
 995 #ifdef CONFIG_HS20
 996                 if (ie == WLAN_EID_VENDOR_SPECIFIC && ie_len >= 5 &&
 997                     WPA_GET_BE24(pos) == OUI_WFA &&
 998                     pos[3] == HS20_WNM_SUB_REM_NEEDED) {
 999                         /* Subscription Remediation subelement */
1000                         const u8 *ie_end;
1001                         u8 url_len;
1002                         char *url;
1003                         u8 osu_method;
1004
1005                         wpa_printf(MSG_DEBUG, "WNM: Subscription Remediation "
1006                                    "subelement");
1007                         ie_end = pos + ie_len;
1008                         pos += 4;
1009                         url_len = *pos++;
1010                         if (url_len == 0) {
1011                                 wpa_printf(MSG_DEBUG, "WNM: No Server URL included");
1012                                 url = NULL;
1013                                 osu_method = 1;
1014                         } else {
1015                                 if (url_len + 1 > ie_end - pos) {
1016                                         wpa_printf(MSG_DEBUG, "WNM: Not enough room for Server URL (len=%u) and Server Method (left %d)",
1017                                                    url_len,
1018                                                    (int) (ie_end - pos));
1019                                         break;
1020                                 }
1021                                 url = os_malloc(url_len + 1);
1022                                 if (url == NULL)
1023                                         break;
1024                                 os_memcpy(url, pos, url_len);
1025                                 url[url_len] = '\0';
1026                                 osu_method = pos[url_len];
1027                         }
1028                         hs20_rx_subscription_remediation(wpa_s, url,
1029                                                          osu_method);
1030                         os_free(url);
1031                         pos = next;
1032                         continue;
1033                 }
1034
1035                 if (ie == WLAN_EID_VENDOR_SPECIFIC && ie_len >= 8 &&
1036                     WPA_GET_BE24(pos) == OUI_WFA &&
1037                     pos[3] == HS20_WNM_DEAUTH_IMMINENT_NOTICE) {
1038                         const u8 *ie_end;
1039                         u8 url_len;
1040                         char *url;
1041                         u8 code;
1042                         u16 reauth_delay;
1043
1044                         ie_end = pos + ie_len;
1045                         pos += 4;
1046                         code = *pos++;
1047                         reauth_delay = WPA_GET_LE16(pos);
1048                         pos += 2;
1049                         url_len = *pos++;
1050                         wpa_printf(MSG_DEBUG, "WNM: HS 2.0 Deauthentication "
1051                                    "Imminent - Reason Code %u   "
1052                                    "Re-Auth Delay %u  URL Length %u",
1053                                    code, reauth_delay, url_len);
1054                         if (url_len > ie_end - pos)
1055                                 break;
1056                         url = os_malloc(url_len + 1);
1057                         if (url == NULL)
1058                                 break;
1059                         os_memcpy(url, pos, url_len);
1060                         url[url_len] = '\0';
1061                         hs20_rx_deauth_imminent_notice(wpa_s, code,
1062                                                        reauth_delay, url);
1063                         os_free(url);
1064                         pos = next;
1065                         continue;
1066                 }
1067 #endif /* CONFIG_HS20 */
1068
1069                 pos = next;
1070         }
1071 }
1072
1073
1074 static void ieee802_11_rx_wnm_notif_req(struct wpa_supplicant *wpa_s,
1075                                         const u8 *sa, const u8 *frm, int len)
1076 {
1077         const u8 *pos, *end;
1078         u8 dialog_token, type;
1079
1080         /* Dialog Token [1] | Type [1] | Subelements */
1081
1082         if (len < 2 || sa == NULL)
1083                 return;
1084         end = frm + len;
1085         pos = frm;
1086         dialog_token = *pos++;
1087         type = *pos++;
1088
1089         wpa_dbg(wpa_s, MSG_DEBUG, "WNM: Received WNM-Notification Request "
1090                 "(dialog_token %u type %u sa " MACSTR ")",
1091                 dialog_token, type, MAC2STR(sa));
1092         wpa_hexdump(MSG_DEBUG, "WNM-Notification Request subelements",
1093                     pos, end - pos);
1094
1095         if (wpa_s->wpa_state != WPA_COMPLETED ||
1096             os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0) {
1097                 wpa_dbg(wpa_s, MSG_DEBUG, "WNM: WNM-Notification frame not "
1098                         "from our AP - ignore it");
1099                 return;
1100         }
1101
1102         switch (type) {
1103         case 1:
1104                 ieee802_11_rx_wnm_notif_req_wfa(wpa_s, sa, pos, end - pos);
1105                 break;
1106         default:
1107                 wpa_dbg(wpa_s, MSG_DEBUG, "WNM: Ignore unknown "
1108                         "WNM-Notification type %u", type);
1109                 break;
1110         }
1111 }
1112
1113
1114 void ieee802_11_rx_wnm_action(struct wpa_supplicant *wpa_s,
1115                               const struct ieee80211_mgmt *mgmt, size_t len)
1116 {
1117         const u8 *pos, *end;
1118         u8 act;
1119
1120         if (len < IEEE80211_HDRLEN + 2)
1121                 return;
1122
1123         pos = ((const u8 *) mgmt) + IEEE80211_HDRLEN + 1;
1124         act = *pos++;
1125         end = ((const u8 *) mgmt) + len;
1126
1127         wpa_printf(MSG_DEBUG, "WNM: RX action %u from " MACSTR,
1128                    act, MAC2STR(mgmt->sa));
1129         if (wpa_s->wpa_state < WPA_ASSOCIATED ||
1130             os_memcmp(mgmt->sa, wpa_s->bssid, ETH_ALEN) != 0) {
1131                 wpa_printf(MSG_DEBUG, "WNM: Ignore unexpected WNM Action "
1132                            "frame");
1133                 return;
1134         }
1135
1136         switch (act) {
1137         case WNM_BSS_TRANS_MGMT_REQ:
1138                 ieee802_11_rx_bss_trans_mgmt_req(wpa_s, pos, end,
1139                                                  !(mgmt->da[0] & 0x01));
1140                 break;
1141         case WNM_SLEEP_MODE_RESP:
1142                 ieee802_11_rx_wnmsleep_resp(wpa_s, pos, end - pos);
1143                 break;
1144         case WNM_NOTIFICATION_REQ:
1145                 ieee802_11_rx_wnm_notif_req(wpa_s, mgmt->sa, pos, end - pos);
1146                 break;
1147         default:
1148                 wpa_printf(MSG_ERROR, "WNM: Unknown request");
1149                 break;
1150         }
1151 }