drivers/staging/rtl8192e/rtllib_softmac_wx.c

   1 /* IEEE 802.11 SoftMAC layer
   2  * Copyright (c) 2005 Andrea Merello <andrea.merello@gmail.com>
   3  *
   4  * Mostly extracted from the rtl8180-sa2400 driver for the
   5  * in-kernel generic ieee802.11 stack.
   6  *
   7  * Some pieces of code might be stolen from ipw2100 driver
   8  * copyright of who own it's copyright ;-)
   9  *
  10  * PS wx handler mostly stolen from hostap, copyright who
  11  * own it's copyright ;-)
  12  *
  13  * released under the GPL
  14  */
  15
  16
  17 #include <linux/etherdevice.h>
  18
  19 #include "rtllib.h"
  20 #include "dot11d.h"
  21 /* FIXME: add A freqs */
  22
  23 const long rtllib_wlan_frequencies[] = {
  24         2412, 2417, 2422, 2427,
  25         2432, 2437, 2442, 2447,
  26         2452, 2457, 2462, 2467,
  27         2472, 2484
  28 };
  29 EXPORT_SYMBOL(rtllib_wlan_frequencies);
  30
  31
  32 int rtllib_wx_set_freq(struct rtllib_device *ieee, struct iw_request_info *a,
  33                              union iwreq_data *wrqu, char *b)
  34 {
  35         int ret;
  36         struct iw_freq *fwrq = &wrqu->freq;
  37
  38         down(&ieee->wx_sem);
  39
  40         if (ieee->iw_mode == IW_MODE_INFRA) {
  41                 ret = 0;
  42                 goto out;
  43         }
  44
  45         /* if setting by freq convert to channel */
  46         if (fwrq->e == 1) {
  47                 if ((fwrq->m >= (int) 2.412e8 &&
  48                      fwrq->m <= (int) 2.487e8)) {
  49                         int f = fwrq->m / 100000;
  50                         int c = 0;
  51
  52                         while ((c < 14) && (f != rtllib_wlan_frequencies[c]))
  53                                 c++;
  54
  55                         /* hack to fall through */
  56                         fwrq->e = 0;
  57                         fwrq->m = c + 1;
  58                 }
  59         }
  60
  61         if (fwrq->e > 0 || fwrq->m > 14 || fwrq->m < 1) {
  62                 ret = -EOPNOTSUPP;
  63                 goto out;
  64
  65         } else { /* Set the channel */
  66
  67                 if (ieee->active_channel_map[fwrq->m] != 1) {
  68                         ret = -EINVAL;
  69                         goto out;
  70                 }
  71                 ieee->current_network.channel = fwrq->m;
  72                 ieee->set_chan(ieee->dev, ieee->current_network.channel);
  73
  74                 if (ieee->iw_mode == IW_MODE_ADHOC ||
  75                     ieee->iw_mode == IW_MODE_MASTER)
  76                         if (ieee->state == RTLLIB_LINKED) {
  77                                 rtllib_stop_send_beacons(ieee);
  78                                 rtllib_start_send_beacons(ieee);
  79                         }
  80         }
  81
  82         ret = 0;
  83 out:
  84         up(&ieee->wx_sem);
  85         return ret;
  86 }
  87 EXPORT_SYMBOL(rtllib_wx_set_freq);
  88
  89
  90 int rtllib_wx_get_freq(struct rtllib_device *ieee,
  91                              struct iw_request_info *a,
  92                              union iwreq_data *wrqu, char *b)
  93 {
  94         struct iw_freq *fwrq = &wrqu->freq;
  95
  96         if (ieee->current_network.channel == 0)
  97                 return -1;
  98         fwrq->m = rtllib_wlan_frequencies[ieee->current_network.channel-1] *
  99                   100000;
 100         fwrq->e = 1;
 101         return 0;
 102 }
 103 EXPORT_SYMBOL(rtllib_wx_get_freq);
 104
 105 int rtllib_wx_get_wap(struct rtllib_device *ieee,
 106                             struct iw_request_info *info,
 107                             union iwreq_data *wrqu, char *extra)
 108 {
 109         unsigned long flags;
 110
 111         wrqu->ap_addr.sa_family = ARPHRD_ETHER;
 112
 113         if (ieee->iw_mode == IW_MODE_MONITOR)
 114                 return -1;
 115
 116         /* We want avoid to give to the user inconsistent infos*/
 117         spin_lock_irqsave(&ieee->lock, flags);
 118
 119         if (ieee->state != RTLLIB_LINKED &&
 120                 ieee->state != RTLLIB_LINKED_SCANNING &&
 121                 ieee->wap_set == 0)
 122
 123                 eth_zero_addr(wrqu->ap_addr.sa_data);
 124         else
 125                 memcpy(wrqu->ap_addr.sa_data,
 126                        ieee->current_network.bssid, ETH_ALEN);
 127
 128         spin_unlock_irqrestore(&ieee->lock, flags);
 129
 130         return 0;
 131 }
 132 EXPORT_SYMBOL(rtllib_wx_get_wap);
 133
 134
 135 int rtllib_wx_set_wap(struct rtllib_device *ieee,
 136                          struct iw_request_info *info,
 137                          union iwreq_data *awrq,
 138                          char *extra)
 139 {
 140
 141         int ret = 0;
 142         unsigned long flags;
 143
 144         short ifup = ieee->proto_started;
 145         struct sockaddr *temp = (struct sockaddr *)awrq;
 146
 147         rtllib_stop_scan_syncro(ieee);
 148
 149         down(&ieee->wx_sem);
 150         /* use ifconfig hw ether */
 151         if (ieee->iw_mode == IW_MODE_MASTER) {
 152                 ret = -1;
 153                 goto out;
 154         }
 155
 156         if (temp->sa_family != ARPHRD_ETHER) {
 157                 ret = -EINVAL;
 158                 goto out;
 159         }
 160
 161         if (is_zero_ether_addr(temp->sa_data)) {
 162                 spin_lock_irqsave(&ieee->lock, flags);
 163                 ether_addr_copy(ieee->current_network.bssid, temp->sa_data);
 164                 ieee->wap_set = 0;
 165                 spin_unlock_irqrestore(&ieee->lock, flags);
 166                 ret = -1;
 167                 goto out;
 168         }
 169
 170
 171         if (ifup)
 172                 rtllib_stop_protocol(ieee, true);
 173
 174         /* just to avoid to give inconsistent infos in the
 175          * get wx method. not really needed otherwise
 176          */
 177         spin_lock_irqsave(&ieee->lock, flags);
 178
 179         ieee->cannot_notify = false;
 180         ether_addr_copy(ieee->current_network.bssid, temp->sa_data);
 181         ieee->wap_set = !is_zero_ether_addr(temp->sa_data);
 182
 183         spin_unlock_irqrestore(&ieee->lock, flags);
 184
 185         if (ifup)
 186                 rtllib_start_protocol(ieee);
 187 out:
 188         up(&ieee->wx_sem);
 189         return ret;
 190 }
 191 EXPORT_SYMBOL(rtllib_wx_set_wap);
 192
 193 int rtllib_wx_get_essid(struct rtllib_device *ieee, struct iw_request_info *a,
 194                          union iwreq_data *wrqu, char *b)
 195 {
 196         int len, ret = 0;
 197         unsigned long flags;
 198
 199         if (ieee->iw_mode == IW_MODE_MONITOR)
 200                 return -1;
 201
 202         /* We want avoid to give to the user inconsistent infos*/
 203         spin_lock_irqsave(&ieee->lock, flags);
 204
 205         if (ieee->current_network.ssid[0] == '\0' ||
 206                 ieee->current_network.ssid_len == 0) {
 207                 ret = -1;
 208                 goto out;
 209         }
 210
 211         if (ieee->state != RTLLIB_LINKED &&
 212                 ieee->state != RTLLIB_LINKED_SCANNING &&
 213                 ieee->ssid_set == 0) {
 214                 ret = -1;
 215                 goto out;
 216         }
 217         len = ieee->current_network.ssid_len;
 218         wrqu->essid.length = len;
 219         strncpy(b, ieee->current_network.ssid, len);
 220         wrqu->essid.flags = 1;
 221
 222 out:
 223         spin_unlock_irqrestore(&ieee->lock, flags);
 224
 225         return ret;
 226
 227 }
 228 EXPORT_SYMBOL(rtllib_wx_get_essid);
 229
 230 int rtllib_wx_set_rate(struct rtllib_device *ieee,
 231                              struct iw_request_info *info,
 232                              union iwreq_data *wrqu, char *extra)
 233 {
 234
 235         u32 target_rate = wrqu->bitrate.value;
 236
 237         ieee->rate = target_rate/100000;
 238         return 0;
 239 }
 240 EXPORT_SYMBOL(rtllib_wx_set_rate);
 241
 242 int rtllib_wx_get_rate(struct rtllib_device *ieee,
 243                              struct iw_request_info *info,
 244                              union iwreq_data *wrqu, char *extra)
 245 {
 246         u32 tmp_rate = 0;
 247
 248         tmp_rate = TxCountToDataRate(ieee,
 249                                      ieee->softmac_stats.CurrentShowTxate);
 250         wrqu->bitrate.value = tmp_rate * 500000;
 251
 252         return 0;
 253 }
 254 EXPORT_SYMBOL(rtllib_wx_get_rate);
 255
 256
 257 int rtllib_wx_set_rts(struct rtllib_device *ieee,
 258                              struct iw_request_info *info,
 259                              union iwreq_data *wrqu, char *extra)
 260 {
 261         if (wrqu->rts.disabled || !wrqu->rts.fixed)
 262                 ieee->rts = DEFAULT_RTS_THRESHOLD;
 263         else {
 264                 if (wrqu->rts.value < MIN_RTS_THRESHOLD ||
 265                                 wrqu->rts.value > MAX_RTS_THRESHOLD)
 266                         return -EINVAL;
 267                 ieee->rts = wrqu->rts.value;
 268         }
 269         return 0;
 270 }
 271 EXPORT_SYMBOL(rtllib_wx_set_rts);
 272
 273 int rtllib_wx_get_rts(struct rtllib_device *ieee,
 274                              struct iw_request_info *info,
 275                              union iwreq_data *wrqu, char *extra)
 276 {
 277         wrqu->rts.value = ieee->rts;
 278         wrqu->rts.fixed = 0;    /* no auto select */
 279         wrqu->rts.disabled = (wrqu->rts.value == DEFAULT_RTS_THRESHOLD);
 280         return 0;
 281 }
 282 EXPORT_SYMBOL(rtllib_wx_get_rts);
 283
 284 int rtllib_wx_set_mode(struct rtllib_device *ieee, struct iw_request_info *a,
 285                              union iwreq_data *wrqu, char *b)
 286 {
 287         int set_mode_status = 0;
 288
 289         rtllib_stop_scan_syncro(ieee);
 290         down(&ieee->wx_sem);
 291         switch (wrqu->mode) {
 292         case IW_MODE_MONITOR:
 293         case IW_MODE_ADHOC:
 294         case IW_MODE_INFRA:
 295                 break;
 296         case IW_MODE_AUTO:
 297                 wrqu->mode = IW_MODE_INFRA;
 298                 break;
 299         default:
 300                 set_mode_status = -EINVAL;
 301                 goto out;
 302         }
 303
 304         if (wrqu->mode == ieee->iw_mode)
 305                 goto out;
 306
 307         if (wrqu->mode == IW_MODE_MONITOR) {
 308                 ieee->dev->type = ARPHRD_IEEE80211;
 309                 rtllib_EnableNetMonitorMode(ieee->dev, false);
 310         } else {
 311                 ieee->dev->type = ARPHRD_ETHER;
 312                 if (ieee->iw_mode == IW_MODE_MONITOR)
 313                         rtllib_DisableNetMonitorMode(ieee->dev, false);
 314         }
 315
 316         if (!ieee->proto_started) {
 317                 ieee->iw_mode = wrqu->mode;
 318         } else {
 319                 rtllib_stop_protocol(ieee, true);
 320                 ieee->iw_mode = wrqu->mode;
 321                 rtllib_start_protocol(ieee);
 322         }
 323
 324 out:
 325         up(&ieee->wx_sem);
 326         return set_mode_status;
 327 }
 328 EXPORT_SYMBOL(rtllib_wx_set_mode);
 329
 330 void rtllib_wx_sync_scan_wq(void *data)
 331 {
 332         struct rtllib_device *ieee = container_of_work_rsl(data,
 333                                      struct rtllib_device, wx_sync_scan_wq);
 334         short chan;
 335         enum ht_extchnl_offset chan_offset = 0;
 336         enum ht_channel_width bandwidth = 0;
 337         int b40M = 0;
 338
 339         if (!(ieee->softmac_features & IEEE_SOFTMAC_SCAN)) {
 340                 rtllib_start_scan_syncro(ieee, 0);
 341                 goto out;
 342         }
 343
 344         chan = ieee->current_network.channel;
 345
 346         if (ieee->LeisurePSLeave)
 347                 ieee->LeisurePSLeave(ieee->dev);
 348         /* notify AP to be in PS mode */
 349         rtllib_sta_ps_send_null_frame(ieee, 1);
 350         rtllib_sta_ps_send_null_frame(ieee, 1);
 351
 352         rtllib_stop_all_queues(ieee);
 353
 354         if (ieee->data_hard_stop)
 355                 ieee->data_hard_stop(ieee->dev);
 356         rtllib_stop_send_beacons(ieee);
 357         ieee->state = RTLLIB_LINKED_SCANNING;
 358         ieee->link_change(ieee->dev);
 359         /* wait for ps packet to be kicked out successfully */
 360         msleep(50);
 361
 362         if (ieee->ScanOperationBackupHandler)
 363                 ieee->ScanOperationBackupHandler(ieee->dev, SCAN_OPT_BACKUP);
 364
 365         if (ieee->pHTInfo->bCurrentHTSupport && ieee->pHTInfo->bEnableHT &&
 366             ieee->pHTInfo->bCurBW40MHz) {
 367                 b40M = 1;
 368                 chan_offset = ieee->pHTInfo->CurSTAExtChnlOffset;
 369                 bandwidth = (enum ht_channel_width)ieee->pHTInfo->bCurBW40MHz;
 370                 RT_TRACE(COMP_DBG, "Scan in 40M, force to 20M first:%d, %d\n",
 371                          chan_offset, bandwidth);
 372                 ieee->SetBWModeHandler(ieee->dev, HT_CHANNEL_WIDTH_20,
 373                                        HT_EXTCHNL_OFFSET_NO_EXT);
 374         }
 375
 376         rtllib_start_scan_syncro(ieee, 0);
 377
 378         if (b40M) {
 379                 RT_TRACE(COMP_DBG, "Scan in 20M, back to 40M\n");
 380                 if (chan_offset == HT_EXTCHNL_OFFSET_UPPER)
 381                         ieee->set_chan(ieee->dev, chan + 2);
 382                 else if (chan_offset == HT_EXTCHNL_OFFSET_LOWER)
 383                         ieee->set_chan(ieee->dev, chan - 2);
 384                 else
 385                         ieee->set_chan(ieee->dev, chan);
 386                 ieee->SetBWModeHandler(ieee->dev, bandwidth, chan_offset);
 387         } else {
 388                 ieee->set_chan(ieee->dev, chan);
 389         }
 390
 391         if (ieee->ScanOperationBackupHandler)
 392                 ieee->ScanOperationBackupHandler(ieee->dev, SCAN_OPT_RESTORE);
 393
 394         ieee->state = RTLLIB_LINKED;
 395         ieee->link_change(ieee->dev);
 396
 397         /* Notify AP that I wake up again */
 398         rtllib_sta_ps_send_null_frame(ieee, 0);
 399
 400         if (ieee->LinkDetectInfo.NumRecvBcnInPeriod == 0 ||
 401             ieee->LinkDetectInfo.NumRecvDataInPeriod == 0) {
 402                 ieee->LinkDetectInfo.NumRecvBcnInPeriod = 1;
 403                 ieee->LinkDetectInfo.NumRecvDataInPeriod = 1;
 404         }
 405
 406         if (ieee->data_hard_resume)
 407                 ieee->data_hard_resume(ieee->dev);
 408
 409         if (ieee->iw_mode == IW_MODE_ADHOC || ieee->iw_mode == IW_MODE_MASTER)
 410                 rtllib_start_send_beacons(ieee);
 411
 412         rtllib_wake_all_queues(ieee);
 413
 414 out:
 415         up(&ieee->wx_sem);
 416
 417 }
 418
 419 int rtllib_wx_set_scan(struct rtllib_device *ieee, struct iw_request_info *a,
 420                              union iwreq_data *wrqu, char *b)
 421 {
 422         int ret = 0;
 423
 424         down(&ieee->wx_sem);
 425
 426         if (ieee->iw_mode == IW_MODE_MONITOR || !(ieee->proto_started)) {
 427                 ret = -1;
 428                 goto out;
 429         }
 430
 431         if (ieee->state == RTLLIB_LINKED) {
 432                 queue_work_rsl(ieee->wq, &ieee->wx_sync_scan_wq);
 433                 /* intentionally forget to up sem */
 434                 return 0;
 435         }
 436
 437 out:
 438         up(&ieee->wx_sem);
 439         return ret;
 440 }
 441 EXPORT_SYMBOL(rtllib_wx_set_scan);
 442
 443 int rtllib_wx_set_essid(struct rtllib_device *ieee,
 444                         struct iw_request_info *a,
 445                         union iwreq_data *wrqu, char *extra)
 446 {
 447
 448         int ret = 0, len, i;
 449         short proto_started;
 450         unsigned long flags;
 451
 452         rtllib_stop_scan_syncro(ieee);
 453         down(&ieee->wx_sem);
 454
 455         proto_started = ieee->proto_started;
 456
 457         len = min_t(__u16, wrqu->essid.length, IW_ESSID_MAX_SIZE);
 458
 459         if (ieee->iw_mode == IW_MODE_MONITOR) {
 460                 ret = -1;
 461                 goto out;
 462         }
 463
 464         for (i = 0; i < len; i++) {
 465                 if (extra[i] < 0) {
 466                         ret = -1;
 467                         goto out;
 468                 }
 469         }
 470
 471         if (proto_started)
 472                 rtllib_stop_protocol(ieee, true);
 473
 474
 475         /* this is just to be sure that the GET wx callback
 476          * has consistent infos. not needed otherwise
 477          */
 478         spin_lock_irqsave(&ieee->lock, flags);
 479
 480         if (wrqu->essid.flags && wrqu->essid.length) {
 481                 strncpy(ieee->current_network.ssid, extra, len);
 482                 ieee->current_network.ssid_len = len;
 483                 ieee->cannot_notify = false;
 484                 ieee->ssid_set = 1;
 485         } else {
 486                 ieee->ssid_set = 0;
 487                 ieee->current_network.ssid[0] = '\0';
 488                 ieee->current_network.ssid_len = 0;
 489         }
 490         spin_unlock_irqrestore(&ieee->lock, flags);
 491
 492         if (proto_started)
 493                 rtllib_start_protocol(ieee);
 494 out:
 495         up(&ieee->wx_sem);
 496         return ret;
 497 }
 498 EXPORT_SYMBOL(rtllib_wx_set_essid);
 499
 500 int rtllib_wx_get_mode(struct rtllib_device *ieee, struct iw_request_info *a,
 501                        union iwreq_data *wrqu, char *b)
 502 {
 503         wrqu->mode = ieee->iw_mode;
 504         return 0;
 505 }
 506 EXPORT_SYMBOL(rtllib_wx_get_mode);
 507
 508 int rtllib_wx_set_rawtx(struct rtllib_device *ieee,
 509                         struct iw_request_info *info,
 510                         union iwreq_data *wrqu, char *extra)
 511 {
 512
 513         int *parms = (int *)extra;
 514         int enable = (parms[0] > 0);
 515         short prev = ieee->raw_tx;
 516
 517         down(&ieee->wx_sem);
 518
 519         if (enable)
 520                 ieee->raw_tx = 1;
 521         else
 522                 ieee->raw_tx = 0;
 523
 524         netdev_info(ieee->dev, "raw TX is %s\n",
 525                     ieee->raw_tx ? "enabled" : "disabled");
 526
 527         if (ieee->iw_mode == IW_MODE_MONITOR) {
 528                 if (prev == 0 && ieee->raw_tx) {
 529                         if (ieee->data_hard_resume)
 530                                 ieee->data_hard_resume(ieee->dev);
 531
 532                         netif_carrier_on(ieee->dev);
 533                 }
 534
 535                 if (prev && ieee->raw_tx == 1)
 536                         netif_carrier_off(ieee->dev);
 537         }
 538
 539         up(&ieee->wx_sem);
 540
 541         return 0;
 542 }
 543 EXPORT_SYMBOL(rtllib_wx_set_rawtx);
 544
 545 int rtllib_wx_get_name(struct rtllib_device *ieee,
 546                              struct iw_request_info *info,
 547                              union iwreq_data *wrqu, char *extra)
 548 {
 549         strcpy(wrqu->name, "802.11");
 550
 551         if (ieee->modulation & RTLLIB_CCK_MODULATION)
 552                 strcat(wrqu->name, "b");
 553         if (ieee->modulation & RTLLIB_OFDM_MODULATION)
 554                 strcat(wrqu->name, "g");
 555         if (ieee->mode & (IEEE_N_24G | IEEE_N_5G))
 556                 strcat(wrqu->name, "n");
 557         return 0;
 558 }
 559 EXPORT_SYMBOL(rtllib_wx_get_name);
 560
 561
 562 /* this is mostly stolen from hostap */
 563 int rtllib_wx_set_power(struct rtllib_device *ieee,
 564                                  struct iw_request_info *info,
 565                                  union iwreq_data *wrqu, char *extra)
 566 {
 567         int ret = 0;
 568
 569         if ((!ieee->sta_wake_up) ||
 570             (!ieee->enter_sleep_state) ||
 571             (!ieee->ps_is_queue_empty)) {
 572                 netdev_warn(ieee->dev,
 573                             "%s(): PS mode is tried to be use but driver missed a callback\n",
 574                             __func__);
 575                 return -1;
 576         }
 577
 578         down(&ieee->wx_sem);
 579
 580         if (wrqu->power.disabled) {
 581                 RT_TRACE(COMP_DBG, "===>%s(): power disable\n", __func__);
 582                 ieee->ps = RTLLIB_PS_DISABLED;
 583                 goto exit;
 584         }
 585         if (wrqu->power.flags & IW_POWER_TIMEOUT) {
 586                 ieee->ps_timeout = wrqu->power.value / 1000;
 587                 RT_TRACE(COMP_DBG, "===>%s():ps_timeout is %d\n", __func__,
 588                          ieee->ps_timeout);
 589         }
 590
 591         if (wrqu->power.flags & IW_POWER_PERIOD)
 592                 ieee->ps_period = wrqu->power.value / 1000;
 593
 594         switch (wrqu->power.flags & IW_POWER_MODE) {
 595         case IW_POWER_UNICAST_R:
 596                 ieee->ps = RTLLIB_PS_UNICAST;
 597                 break;
 598         case IW_POWER_MULTICAST_R:
 599                 ieee->ps = RTLLIB_PS_MBCAST;
 600                 break;
 601         case IW_POWER_ALL_R:
 602                 ieee->ps = RTLLIB_PS_UNICAST | RTLLIB_PS_MBCAST;
 603                 break;
 604
 605         case IW_POWER_ON:
 606                 break;
 607
 608         default:
 609                 ret = -EINVAL;
 610                 goto exit;
 611
 612         }
 613 exit:
 614         up(&ieee->wx_sem);
 615         return ret;
 616
 617 }
 618 EXPORT_SYMBOL(rtllib_wx_set_power);
 619
 620 /* this is stolen from hostap */
 621 int rtllib_wx_get_power(struct rtllib_device *ieee,
 622                                  struct iw_request_info *info,
 623                                  union iwreq_data *wrqu, char *extra)
 624 {
 625         down(&ieee->wx_sem);
 626
 627         if (ieee->ps == RTLLIB_PS_DISABLED) {
 628                 wrqu->power.disabled = 1;
 629                 goto exit;
 630         }
 631
 632         wrqu->power.disabled = 0;
 633
 634         if ((wrqu->power.flags & IW_POWER_TYPE) == IW_POWER_TIMEOUT) {
 635                 wrqu->power.flags = IW_POWER_TIMEOUT;
 636                 wrqu->power.value = ieee->ps_timeout * 1000;
 637         } else {
 638                 wrqu->power.flags = IW_POWER_PERIOD;
 639                 wrqu->power.value = ieee->ps_period * 1000;
 640         }
 641
 642         if ((ieee->ps & (RTLLIB_PS_MBCAST | RTLLIB_PS_UNICAST)) ==
 643             (RTLLIB_PS_MBCAST | RTLLIB_PS_UNICAST))
 644                 wrqu->power.flags |= IW_POWER_ALL_R;
 645         else if (ieee->ps & RTLLIB_PS_MBCAST)
 646                 wrqu->power.flags |= IW_POWER_MULTICAST_R;
 647         else
 648                 wrqu->power.flags |= IW_POWER_UNICAST_R;
 649
 650 exit:
 651         up(&ieee->wx_sem);
 652         return 0;
 653
 654 }
 655 EXPORT_SYMBOL(rtllib_wx_get_power);