drivers/staging/rtl8192e/ieee80211/ieee80211_softmac_wx.c

   1 /* IEEE 802.11 SoftMAC layer
   2  * Copyright (c) 2005 Andrea Merello <andreamrl@tiscali.it>
   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 "ieee80211.h"
  18 #ifdef ENABLE_DOT11D
  19 #include "dot11d.h"
  20 #endif
  21 /* FIXME: add A freqs */
  22
  23 const long ieee80211_wlan_frequencies[] = {
  24         2412, 2417, 2422, 2427,
  25         2432, 2437, 2442, 2447,
  26         2452, 2457, 2462, 2467,
  27         2472, 2484
  28 };
  29
  30
  31 int ieee80211_wx_set_freq(struct ieee80211_device *ieee, struct iw_request_info *a,
  32                              union iwreq_data *wrqu, char *b)
  33 {
  34         int ret;
  35         struct iw_freq *fwrq = & wrqu->freq;
  36
  37         down(&ieee->wx_sem);
  38
  39         if(ieee->iw_mode == IW_MODE_INFRA){
  40                 ret = -EOPNOTSUPP;
  41                 goto out;
  42         }
  43
  44         /* if setting by freq convert to channel */
  45         if (fwrq->e == 1) {
  46                 if ((fwrq->m >= (int) 2.412e8 &&
  47                      fwrq->m <= (int) 2.487e8)) {
  48                         int f = fwrq->m / 100000;
  49                         int c = 0;
  50
  51                         while ((c < 14) && (f != ieee80211_wlan_frequencies[c]))
  52                                 c++;
  53
  54                         /* hack to fall through */
  55                         fwrq->e = 0;
  56                         fwrq->m = c + 1;
  57                 }
  58         }
  59
  60         if (fwrq->e > 0 || fwrq->m > 14 || fwrq->m < 1 ){
  61                 ret = -EOPNOTSUPP;
  62                 goto out;
  63
  64         }else { /* Set the channel */
  65
  66 #ifdef ENABLE_DOT11D
  67                 if (!(GET_DOT11D_INFO(ieee)->channel_map)[fwrq->m]) {
  68                         ret = -EINVAL;
  69                         goto out;
  70                 }
  71 #endif
  72                 ieee->current_network.channel = fwrq->m;
  73                 ieee->set_chan(ieee, ieee->current_network.channel);
  74
  75                 if(ieee->iw_mode == IW_MODE_ADHOC || ieee->iw_mode == IW_MODE_MASTER)
  76                         if(ieee->state == IEEE80211_LINKED){
  77
  78                         ieee80211_stop_send_beacons(ieee);
  79                         ieee80211_start_send_beacons(ieee);
  80                         }
  81         }
  82
  83         ret = 0;
  84 out:
  85         up(&ieee->wx_sem);
  86         return ret;
  87 }
  88
  89
  90 int ieee80211_wx_get_freq(struct ieee80211_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         //NM 0.7.0 will not accept channel any more.
  99         fwrq->m = ieee80211_wlan_frequencies[ieee->current_network.channel-1] * 100000;
 100         fwrq->e = 1;
 101
 102         return 0;
 103 }
 104
 105 int ieee80211_wx_get_wap(struct ieee80211_device *ieee,
 106                             struct iw_request_info *info,
 107                             union iwreq_data *wrqu, char *extra)
 108 {
 109         unsigned long flags;
 110         wrqu->ap_addr.sa_family = ARPHRD_ETHER;
 111
 112         if (ieee->iw_mode == IW_MODE_MONITOR)
 113                 return -1;
 114
 115         /* We want avoid to give to the user inconsistent infos*/
 116         spin_lock_irqsave(&ieee->lock, flags);
 117
 118         if (ieee->state != IEEE80211_LINKED &&
 119                 ieee->state != IEEE80211_LINKED_SCANNING &&
 120                 ieee->wap_set == 0)
 121
 122                 memset(wrqu->ap_addr.sa_data, 0, ETH_ALEN);
 123         else
 124                 memcpy(wrqu->ap_addr.sa_data,
 125                        ieee->current_network.bssid, ETH_ALEN);
 126
 127         spin_unlock_irqrestore(&ieee->lock, flags);
 128
 129         return 0;
 130 }
 131
 132
 133 int ieee80211_wx_set_wap(struct ieee80211_device *ieee,
 134                          struct iw_request_info *info,
 135                          union iwreq_data *awrq,
 136                          char *extra)
 137 {
 138
 139         int ret = 0;
 140         u8 zero[] = {0,0,0,0,0,0};
 141         unsigned long flags;
 142
 143         short ifup = ieee->proto_started;//dev->flags & IFF_UP;
 144         struct sockaddr *temp = (struct sockaddr *)awrq;
 145
 146         ieee->sync_scan_hurryup = 1;
 147
 148         down(&ieee->wx_sem);
 149         /* use ifconfig hw ether */
 150         if (ieee->iw_mode == IW_MODE_MASTER){
 151                 ret = -1;
 152                 goto out;
 153         }
 154
 155         if (temp->sa_family != ARPHRD_ETHER){
 156                 ret = -EINVAL;
 157                 goto out;
 158         }
 159
 160         if (ifup)
 161                 ieee80211_stop_protocol(ieee,true);
 162
 163         /* just to avoid to give inconsistent infos in the
 164          * get wx method. not really needed otherwise
 165          */
 166         spin_lock_irqsave(&ieee->lock, flags);
 167
 168         memcpy(ieee->current_network.bssid, temp->sa_data, ETH_ALEN);
 169         ieee->wap_set = memcmp(temp->sa_data, zero,ETH_ALEN)!=0;
 170
 171         spin_unlock_irqrestore(&ieee->lock, flags);
 172
 173         if (ifup)
 174                 ieee80211_start_protocol(ieee);
 175 out:
 176         up(&ieee->wx_sem);
 177         return ret;
 178 }
 179
 180  int ieee80211_wx_get_essid(struct ieee80211_device *ieee, struct iw_request_info *a,union iwreq_data *wrqu,char *b)
 181 {
 182         int len,ret = 0;
 183         unsigned long flags;
 184
 185         if (ieee->iw_mode == IW_MODE_MONITOR)
 186                 return -1;
 187
 188         /* We want avoid to give to the user inconsistent infos*/
 189         spin_lock_irqsave(&ieee->lock, flags);
 190
 191         if (ieee->current_network.ssid[0] == '\0' ||
 192                 ieee->current_network.ssid_len == 0){
 193                 ret = -1;
 194                 goto out;
 195         }
 196
 197         if (ieee->state != IEEE80211_LINKED &&
 198                 ieee->state != IEEE80211_LINKED_SCANNING &&
 199                 ieee->ssid_set == 0){
 200                 ret = -1;
 201                 goto out;
 202         }
 203         len = ieee->current_network.ssid_len;
 204         wrqu->essid.length = len;
 205         strncpy(b,ieee->current_network.ssid,len);
 206         wrqu->essid.flags = 1;
 207
 208 out:
 209         spin_unlock_irqrestore(&ieee->lock, flags);
 210
 211         return ret;
 212
 213 }
 214
 215 int ieee80211_wx_set_rate(struct ieee80211_device *ieee,
 216                              struct iw_request_info *info,
 217                              union iwreq_data *wrqu, char *extra)
 218 {
 219
 220         u32 target_rate = wrqu->bitrate.value;
 221
 222         ieee->rate = target_rate/100000;
 223         //FIXME: we might want to limit rate also in management protocols.
 224         return 0;
 225 }
 226
 227
 228
 229 int ieee80211_wx_get_rate(struct ieee80211_device *ieee,
 230                              struct iw_request_info *info,
 231                              union iwreq_data *wrqu, char *extra)
 232 {
 233         u32 tmp_rate;
 234         tmp_rate = TxCountToDataRate(ieee, ieee->softmac_stats.CurrentShowTxate);
 235
 236         wrqu->bitrate.value = tmp_rate * 500000;
 237
 238         return 0;
 239 }
 240
 241
 242 int ieee80211_wx_set_rts(struct ieee80211_device *ieee,
 243                              struct iw_request_info *info,
 244                              union iwreq_data *wrqu, char *extra)
 245 {
 246         if (wrqu->rts.disabled || !wrqu->rts.fixed)
 247                 ieee->rts = DEFAULT_RTS_THRESHOLD;
 248         else
 249         {
 250                 if (wrqu->rts.value < MIN_RTS_THRESHOLD ||
 251                                 wrqu->rts.value > MAX_RTS_THRESHOLD)
 252                         return -EINVAL;
 253                 ieee->rts = wrqu->rts.value;
 254         }
 255         return 0;
 256 }
 257
 258 int ieee80211_wx_get_rts(struct ieee80211_device *ieee,
 259                              struct iw_request_info *info,
 260                              union iwreq_data *wrqu, char *extra)
 261 {
 262         wrqu->rts.value = ieee->rts;
 263         wrqu->rts.fixed = 0;    /* no auto select */
 264         wrqu->rts.disabled = (wrqu->rts.value == DEFAULT_RTS_THRESHOLD);
 265         return 0;
 266 }
 267 int ieee80211_wx_set_mode(struct ieee80211_device *ieee, struct iw_request_info *a,
 268                              union iwreq_data *wrqu, char *b)
 269 {
 270
 271         ieee->sync_scan_hurryup = 1;
 272
 273         down(&ieee->wx_sem);
 274
 275         if (wrqu->mode == ieee->iw_mode)
 276                 goto out;
 277
 278         if (wrqu->mode == IW_MODE_MONITOR){
 279
 280                 ieee->dev->type = ARPHRD_IEEE80211;
 281         }else{
 282                 ieee->dev->type = ARPHRD_ETHER;
 283         }
 284
 285         if (!ieee->proto_started){
 286                 ieee->iw_mode = wrqu->mode;
 287         }else{
 288                 ieee80211_stop_protocol(ieee,true);
 289                 ieee->iw_mode = wrqu->mode;
 290                 ieee80211_start_protocol(ieee);
 291         }
 292
 293 out:
 294         up(&ieee->wx_sem);
 295         return 0;
 296 }
 297
 298 void ieee80211_wx_sync_scan_wq(struct work_struct *work)
 299 {
 300         struct ieee80211_device *ieee = container_of(work, struct ieee80211_device, wx_sync_scan_wq);
 301         short chan;
 302         HT_EXTCHNL_OFFSET chan_offset=0;
 303         HT_CHANNEL_WIDTH bandwidth=0;
 304         int b40M = 0;
 305         static int count = 0;
 306         chan = ieee->current_network.channel;
 307
 308 #ifdef ENABLE_LPS
 309         if (ieee->LeisurePSLeave) {
 310                 ieee->LeisurePSLeave(ieee);
 311         }
 312
 313         /* notify AP to be in PS mode */
 314         ieee80211_sta_ps_send_null_frame(ieee, 1);
 315         ieee80211_sta_ps_send_null_frame(ieee, 1);
 316 #endif
 317
 318         if (ieee->data_hard_stop)
 319                 ieee->data_hard_stop(ieee);
 320
 321         ieee80211_stop_send_beacons(ieee);
 322
 323         ieee->state = IEEE80211_LINKED_SCANNING;
 324         ieee->link_change(ieee);
 325         ieee->InitialGainHandler(ieee->dev,IG_Backup);
 326         if (ieee->pHTInfo->bCurrentHTSupport && ieee->pHTInfo->bEnableHT && ieee->pHTInfo->bCurBW40MHz) {
 327                 b40M = 1;
 328                 chan_offset = ieee->pHTInfo->CurSTAExtChnlOffset;
 329                 bandwidth = (HT_CHANNEL_WIDTH)ieee->pHTInfo->bCurBW40MHz;
 330                 printk("Scan in 40M, force to 20M first:%d, %d\n", chan_offset, bandwidth);
 331                 ieee->SetBWModeHandler(ieee->dev, HT_CHANNEL_WIDTH_20, HT_EXTCHNL_OFFSET_NO_EXT);
 332                 }
 333         ieee80211_start_scan_syncro(ieee);
 334         if (b40M) {
 335                 printk("Scan in 20M, back to 40M\n");
 336                 if (chan_offset == HT_EXTCHNL_OFFSET_UPPER)
 337                         ieee->set_chan(ieee, chan + 2);
 338                 else if (chan_offset == HT_EXTCHNL_OFFSET_LOWER)
 339                         ieee->set_chan(ieee, chan - 2);
 340                 else
 341                         ieee->set_chan(ieee, chan);
 342                 ieee->SetBWModeHandler(ieee->dev, bandwidth, chan_offset);
 343         } else {
 344                 ieee->set_chan(ieee, chan);
 345         }
 346
 347         ieee->InitialGainHandler(ieee->dev,IG_Restore);
 348         ieee->state = IEEE80211_LINKED;
 349         ieee->link_change(ieee);
 350
 351 #ifdef ENABLE_LPS
 352         /* Notify AP that I wake up again */
 353         ieee80211_sta_ps_send_null_frame(ieee, 0);
 354 #endif
 355
 356         // To prevent the immediately calling watch_dog after scan.
 357         if(ieee->LinkDetectInfo.NumRecvBcnInPeriod==0||ieee->LinkDetectInfo.NumRecvDataInPeriod==0 )
 358         {
 359                 ieee->LinkDetectInfo.NumRecvBcnInPeriod = 1;
 360                 ieee->LinkDetectInfo.NumRecvDataInPeriod= 1;
 361         }
 362         if (ieee->data_hard_resume)
 363                 ieee->data_hard_resume(ieee);
 364
 365         if(ieee->iw_mode == IW_MODE_ADHOC || ieee->iw_mode == IW_MODE_MASTER)
 366                 ieee80211_start_send_beacons(ieee);
 367
 368         count = 0;
 369         up(&ieee->wx_sem);
 370
 371 }
 372
 373 int ieee80211_wx_set_scan(struct ieee80211_device *ieee, struct iw_request_info *a,
 374                              union iwreq_data *wrqu, char *b)
 375 {
 376         int ret = 0;
 377
 378         down(&ieee->wx_sem);
 379
 380         if (ieee->iw_mode == IW_MODE_MONITOR || !(ieee->proto_started)){
 381                 ret = -1;
 382                 goto out;
 383         }
 384
 385         if ( ieee->state == IEEE80211_LINKED){
 386                 queue_work(ieee->wq, &ieee->wx_sync_scan_wq);
 387                 /* intentionally forget to up sem */
 388                 return 0;
 389         }
 390
 391 out:
 392         up(&ieee->wx_sem);
 393         return ret;
 394 }
 395
 396 int ieee80211_wx_set_essid(struct ieee80211_device *ieee,
 397                               struct iw_request_info *a,
 398                               union iwreq_data *wrqu, char *extra)
 399 {
 400
 401         int ret=0,len;
 402         short proto_started;
 403         unsigned long flags;
 404
 405         ieee->sync_scan_hurryup = 1;
 406         down(&ieee->wx_sem);
 407
 408         proto_started = ieee->proto_started;
 409
 410         if (wrqu->essid.length > IW_ESSID_MAX_SIZE){
 411                 ret= -E2BIG;
 412                 goto out;
 413         }
 414
 415         if (ieee->iw_mode == IW_MODE_MONITOR){
 416                 ret= -1;
 417                 goto out;
 418         }
 419
 420         if(proto_started){
 421                 ieee80211_stop_protocol(ieee,true);
 422         }
 423
 424
 425         /* this is just to be sure that the GET wx callback
 426          * has consisten infos. not needed otherwise
 427          */
 428         spin_lock_irqsave(&ieee->lock, flags);
 429
 430         if (wrqu->essid.flags && wrqu->essid.length) {
 431                 //first flush current network.ssid
 432                 len = ((wrqu->essid.length-1) < IW_ESSID_MAX_SIZE) ? (wrqu->essid.length-1) : IW_ESSID_MAX_SIZE;
 433                 strncpy(ieee->current_network.ssid, extra, len+1);
 434                 ieee->current_network.ssid_len = len+1;
 435                 ieee->ssid_set = 1;
 436         }
 437         else{
 438                 ieee->ssid_set = 0;
 439                 ieee->current_network.ssid[0] = '\0';
 440                 ieee->current_network.ssid_len = 0;
 441         }
 442         spin_unlock_irqrestore(&ieee->lock, flags);
 443
 444         if (proto_started)
 445                 ieee80211_start_protocol(ieee);
 446 out:
 447         up(&ieee->wx_sem);
 448         return ret;
 449 }
 450
 451  int ieee80211_wx_get_mode(struct ieee80211_device *ieee, struct iw_request_info *a,
 452                              union iwreq_data *wrqu, char *b)
 453 {
 454
 455         wrqu->mode = ieee->iw_mode;
 456         return 0;
 457 }
 458
 459  int ieee80211_wx_set_rawtx(struct ieee80211_device *ieee,
 460                                struct iw_request_info *info,
 461                                union iwreq_data *wrqu, char *extra)
 462 {
 463
 464         int *parms = (int *)extra;
 465         int enable = (parms[0] > 0);
 466         short prev = ieee->raw_tx;
 467
 468         down(&ieee->wx_sem);
 469
 470         if(enable)
 471                 ieee->raw_tx = 1;
 472         else
 473                 ieee->raw_tx = 0;
 474
 475         printk(KERN_INFO"raw TX is %s\n",
 476               ieee->raw_tx ? "enabled" : "disabled");
 477
 478         if(ieee->iw_mode == IW_MODE_MONITOR)
 479         {
 480                 if(prev == 0 && ieee->raw_tx){
 481                         if (ieee->data_hard_resume)
 482                                 ieee->data_hard_resume(ieee);
 483
 484                         netif_carrier_on(ieee->dev);
 485                 }
 486
 487                 if(prev && ieee->raw_tx == 1)
 488                         netif_carrier_off(ieee->dev);
 489         }
 490
 491         up(&ieee->wx_sem);
 492
 493         return 0;
 494 }
 495
 496 int ieee80211_wx_get_name(struct ieee80211_device *ieee,
 497                              struct iw_request_info *info,
 498                              union iwreq_data *wrqu, char *extra)
 499 {
 500         strcpy(wrqu->name, "802.11");
 501         if(ieee->modulation & IEEE80211_CCK_MODULATION)
 502                 strcat(wrqu->name, "b");
 503         if(ieee->modulation & IEEE80211_OFDM_MODULATION)
 504                 strcat(wrqu->name, "g");
 505         if (ieee->mode & (IEEE_N_24G | IEEE_N_5G))
 506                 strcat(wrqu->name, "n");
 507         return 0;
 508 }
 509
 510
 511 /* this is mostly stolen from hostap */
 512 int ieee80211_wx_set_power(struct ieee80211_device *ieee,
 513                                  struct iw_request_info *info,
 514                                  union iwreq_data *wrqu, char *extra)
 515 {
 516         int ret = 0;
 517
 518         if(
 519                 (!ieee->sta_wake_up) ||
 520                 (!ieee->enter_sleep_state) ||
 521                 (!ieee->ps_is_queue_empty)){
 522
 523                 return -1;
 524         }
 525
 526         down(&ieee->wx_sem);
 527
 528         if (wrqu->power.disabled){
 529                 ieee->ps = IEEE80211_PS_DISABLED;
 530                 goto exit;
 531         }
 532         if (wrqu->power.flags & IW_POWER_TIMEOUT) {
 533                 ieee->ps_timeout = wrqu->power.value / 1000;
 534         }
 535
 536         if (wrqu->power.flags & IW_POWER_PERIOD) {
 537                 ieee->ps_period = wrqu->power.value / 1000;
 538         }
 539         switch (wrqu->power.flags & IW_POWER_MODE) {
 540         case IW_POWER_UNICAST_R:
 541                 ieee->ps = IEEE80211_PS_UNICAST;
 542                 break;
 543         case IW_POWER_MULTICAST_R:
 544                 ieee->ps = IEEE80211_PS_MBCAST;
 545                 break;
 546         case IW_POWER_ALL_R:
 547                 ieee->ps = IEEE80211_PS_UNICAST | IEEE80211_PS_MBCAST;
 548                 break;
 549
 550         case IW_POWER_ON:
 551                 break;
 552
 553         default:
 554                 ret = -EINVAL;
 555                 goto exit;
 556
 557         }
 558 exit:
 559         up(&ieee->wx_sem);
 560         return ret;
 561
 562 }
 563
 564 /* this is stolen from hostap */
 565 int ieee80211_wx_get_power(struct ieee80211_device *ieee,
 566                                  struct iw_request_info *info,
 567                                  union iwreq_data *wrqu, char *extra)
 568 {
 569         int ret =0;
 570
 571         down(&ieee->wx_sem);
 572
 573         if(ieee->ps == IEEE80211_PS_DISABLED){
 574                 wrqu->power.disabled = 1;
 575                 goto exit;
 576         }
 577
 578         wrqu->power.disabled = 0;
 579
 580         if ((wrqu->power.flags & IW_POWER_TYPE) == IW_POWER_TIMEOUT) {
 581                 wrqu->power.flags = IW_POWER_TIMEOUT;
 582                 wrqu->power.value = ieee->ps_timeout * 1000;
 583         } else {
 584                 wrqu->power.flags = IW_POWER_PERIOD;
 585                 wrqu->power.value = ieee->ps_period * 1000;
 586         }
 587
 588        if ((ieee->ps & (IEEE80211_PS_MBCAST | IEEE80211_PS_UNICAST)) == (IEEE80211_PS_MBCAST | IEEE80211_PS_UNICAST))
 589                 wrqu->power.flags |= IW_POWER_ALL_R;
 590         else if (ieee->ps & IEEE80211_PS_MBCAST)
 591                 wrqu->power.flags |= IW_POWER_MULTICAST_R;
 592         else
 593                 wrqu->power.flags |= IW_POWER_UNICAST_R;
 594
 595 exit:
 596         up(&ieee->wx_sem);
 597         return ret;
 598
 599 }
 600