drivers/staging/rtl8192u/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 #include "dot11d.h"
  19 /* FIXME: add A freqs */
  20
  21 const long ieee80211_wlan_frequencies[] = {
  22         2412, 2417, 2422, 2427,
  23         2432, 2437, 2442, 2447,
  24         2452, 2457, 2462, 2467,
  25         2472, 2484
  26 };
  27
  28
  29 int ieee80211_wx_set_freq(struct ieee80211_device *ieee, struct iw_request_info *a,
  30                              union iwreq_data *wrqu, char *b)
  31 {
  32         int ret;
  33         struct iw_freq *fwrq = & wrqu->freq;
  34
  35         down(&ieee->wx_sem);
  36
  37         if(ieee->iw_mode == IW_MODE_INFRA){
  38                 ret = -EOPNOTSUPP;
  39                 goto out;
  40         }
  41
  42         /* if setting by freq convert to channel */
  43         if (fwrq->e == 1) {
  44                 if ((fwrq->m >= (int) 2.412e8 &&
  45                      fwrq->m <= (int) 2.487e8)) {
  46                         int f = fwrq->m / 100000;
  47                         int c = 0;
  48
  49                         while ((c < 14) && (f != ieee80211_wlan_frequencies[c]))
  50                                 c++;
  51
  52                         /* hack to fall through */
  53                         fwrq->e = 0;
  54                         fwrq->m = c + 1;
  55                 }
  56         }
  57
  58         if (fwrq->e > 0 || fwrq->m > 14 || fwrq->m < 1 ){
  59                 ret = -EOPNOTSUPP;
  60                 goto out;
  61
  62         }else { /* Set the channel */
  63
  64                 if (!(GET_DOT11D_INFO(ieee)->channel_map)[fwrq->m]) {
  65                         ret = -EINVAL;
  66                         goto out;
  67                 }
  68                 ieee->current_network.channel = fwrq->m;
  69                 ieee->set_chan(ieee->dev, ieee->current_network.channel);
  70
  71                 if(ieee->iw_mode == IW_MODE_ADHOC || ieee->iw_mode == IW_MODE_MASTER)
  72                         if(ieee->state == IEEE80211_LINKED){
  73
  74                         ieee80211_stop_send_beacons(ieee);
  75                         ieee80211_start_send_beacons(ieee);
  76                         }
  77         }
  78
  79         ret = 0;
  80 out:
  81         up(&ieee->wx_sem);
  82         return ret;
  83 }
  84
  85
  86 int ieee80211_wx_get_freq(struct ieee80211_device *ieee,
  87                              struct iw_request_info *a,
  88                              union iwreq_data *wrqu, char *b)
  89 {
  90         struct iw_freq *fwrq = & wrqu->freq;
  91
  92         if (ieee->current_network.channel == 0)
  93                 return -1;
  94         //NM 0.7.0 will not accept channel any more.
  95         fwrq->m = ieee80211_wlan_frequencies[ieee->current_network.channel-1] * 100000;
  96         fwrq->e = 1;
  97 //      fwrq->m = ieee->current_network.channel;
  98 //      fwrq->e = 0;
  99
 100         return 0;
 101 }
 102
 103 int ieee80211_wx_get_wap(struct ieee80211_device *ieee,
 104                             struct iw_request_info *info,
 105                             union iwreq_data *wrqu, char *extra)
 106 {
 107         unsigned long flags;
 108
 109         wrqu->ap_addr.sa_family = ARPHRD_ETHER;
 110
 111         if (ieee->iw_mode == IW_MODE_MONITOR)
 112                 return -1;
 113
 114         /* We want avoid to give to the user inconsistent infos*/
 115         spin_lock_irqsave(&ieee->lock, flags);
 116
 117         if (ieee->state != IEEE80211_LINKED &&
 118                 ieee->state != IEEE80211_LINKED_SCANNING &&
 119                 ieee->wap_set == 0)
 120
 121                 memset(wrqu->ap_addr.sa_data, 0, ETH_ALEN);
 122         else
 123                 memcpy(wrqu->ap_addr.sa_data,
 124                        ieee->current_network.bssid, ETH_ALEN);
 125
 126         spin_unlock_irqrestore(&ieee->lock, flags);
 127
 128         return 0;
 129 }
 130
 131
 132 int ieee80211_wx_set_wap(struct ieee80211_device *ieee,
 133                          struct iw_request_info *info,
 134                          union iwreq_data *awrq,
 135                          char *extra)
 136 {
 137
 138         int ret = 0;
 139         u8 zero[] = {0,0,0,0,0,0};
 140         unsigned long flags;
 141
 142         short ifup = ieee->proto_started;//dev->flags & IFF_UP;
 143         struct sockaddr *temp = (struct sockaddr *)awrq;
 144
 145         ieee->sync_scan_hurryup = 1;
 146
 147         down(&ieee->wx_sem);
 148         /* use ifconfig hw ether */
 149         if (ieee->iw_mode == IW_MODE_MASTER){
 150                 ret = -1;
 151                 goto out;
 152         }
 153
 154         if (temp->sa_family != ARPHRD_ETHER){
 155                 ret = -EINVAL;
 156                 goto out;
 157         }
 158
 159         if (ifup)
 160                 ieee80211_stop_protocol(ieee);
 161
 162         /* just to avoid to give inconsistent infos in the
 163          * get wx method. not really needed otherwise
 164          */
 165         spin_lock_irqsave(&ieee->lock, flags);
 166
 167         memcpy(ieee->current_network.bssid, temp->sa_data, ETH_ALEN);
 168         ieee->wap_set = memcmp(temp->sa_data, zero,ETH_ALEN)!=0;
 169
 170         spin_unlock_irqrestore(&ieee->lock, flags);
 171
 172         if (ifup)
 173                 ieee80211_start_protocol(ieee);
 174 out:
 175         up(&ieee->wx_sem);
 176         return ret;
 177 }
 178
 179  int ieee80211_wx_get_essid(struct ieee80211_device *ieee, struct iw_request_info *a,union iwreq_data *wrqu,char *b)
 180 {
 181         int len,ret = 0;
 182         unsigned long flags;
 183
 184         if (ieee->iw_mode == IW_MODE_MONITOR)
 185                 return -1;
 186
 187         /* We want avoid to give to the user inconsistent infos*/
 188         spin_lock_irqsave(&ieee->lock, flags);
 189
 190         if (ieee->current_network.ssid[0] == '\0' ||
 191                 ieee->current_network.ssid_len == 0){
 192                 ret = -1;
 193                 goto out;
 194         }
 195
 196         if (ieee->state != IEEE80211_LINKED &&
 197                 ieee->state != IEEE80211_LINKED_SCANNING &&
 198                 ieee->ssid_set == 0){
 199                 ret = -1;
 200                 goto out;
 201         }
 202         len = ieee->current_network.ssid_len;
 203         wrqu->essid.length = len;
 204         strncpy(b,ieee->current_network.ssid,len);
 205         wrqu->essid.flags = 1;
 206
 207 out:
 208         spin_unlock_irqrestore(&ieee->lock, flags);
 209
 210         return ret;
 211
 212 }
 213
 214 int ieee80211_wx_set_rate(struct ieee80211_device *ieee,
 215                              struct iw_request_info *info,
 216                              union iwreq_data *wrqu, char *extra)
 217 {
 218
 219         u32 target_rate = wrqu->bitrate.value;
 220
 221         ieee->rate = target_rate/100000;
 222         //FIXME: we might want to limit rate also in management protocols.
 223         return 0;
 224 }
 225
 226
 227
 228 int ieee80211_wx_get_rate(struct ieee80211_device *ieee,
 229                              struct iw_request_info *info,
 230                              union iwreq_data *wrqu, char *extra)
 231 {
 232         u32 tmp_rate;
 233         tmp_rate = TxCountToDataRate(ieee, ieee->softmac_stats.CurrentShowTxate);
 234
 235         wrqu->bitrate.value = tmp_rate * 500000;
 236
 237         return 0;
 238 }
 239
 240
 241 int ieee80211_wx_set_rts(struct ieee80211_device *ieee,
 242                              struct iw_request_info *info,
 243                              union iwreq_data *wrqu, char *extra)
 244 {
 245         if (wrqu->rts.disabled || !wrqu->rts.fixed)
 246                 ieee->rts = DEFAULT_RTS_THRESHOLD;
 247         else
 248         {
 249                 if (wrqu->rts.value < MIN_RTS_THRESHOLD ||
 250                                 wrqu->rts.value > MAX_RTS_THRESHOLD)
 251                         return -EINVAL;
 252                 ieee->rts = wrqu->rts.value;
 253         }
 254         return 0;
 255 }
 256
 257 int ieee80211_wx_get_rts(struct ieee80211_device *ieee,
 258                              struct iw_request_info *info,
 259                              union iwreq_data *wrqu, char *extra)
 260 {
 261         wrqu->rts.value = ieee->rts;
 262         wrqu->rts.fixed = 0;    /* no auto select */
 263         wrqu->rts.disabled = (wrqu->rts.value == DEFAULT_RTS_THRESHOLD);
 264         return 0;
 265 }
 266 int ieee80211_wx_set_mode(struct ieee80211_device *ieee, struct iw_request_info *a,
 267                              union iwreq_data *wrqu, char *b)
 268 {
 269
 270         ieee->sync_scan_hurryup = 1;
 271
 272         down(&ieee->wx_sem);
 273
 274         if (wrqu->mode == ieee->iw_mode)
 275                 goto out;
 276
 277         if (wrqu->mode == IW_MODE_MONITOR){
 278
 279                 ieee->dev->type = ARPHRD_IEEE80211;
 280         }else{
 281                 ieee->dev->type = ARPHRD_ETHER;
 282         }
 283
 284         if (!ieee->proto_started){
 285                 ieee->iw_mode = wrqu->mode;
 286         }else{
 287                 ieee80211_stop_protocol(ieee);
 288                 ieee->iw_mode = wrqu->mode;
 289                 ieee80211_start_protocol(ieee);
 290         }
 291
 292 out:
 293         up(&ieee->wx_sem);
 294         return 0;
 295 }
 296
 297 void ieee80211_wx_sync_scan_wq(struct work_struct *work)
 298 {
 299         struct ieee80211_device *ieee = container_of(work, struct ieee80211_device, wx_sync_scan_wq);
 300         short chan;
 301         HT_EXTCHNL_OFFSET chan_offset=0;
 302         HT_CHANNEL_WIDTH bandwidth=0;
 303         int b40M = 0;
 304         static int count = 0;
 305         chan = ieee->current_network.channel;
 306         netif_carrier_off(ieee->dev);
 307
 308         if (ieee->data_hard_stop)
 309                 ieee->data_hard_stop(ieee->dev);
 310
 311         ieee80211_stop_send_beacons(ieee);
 312
 313         ieee->state = IEEE80211_LINKED_SCANNING;
 314         ieee->link_change(ieee->dev);
 315         ieee->InitialGainHandler(ieee->dev,IG_Backup);
 316         if (ieee->pHTInfo->bCurrentHTSupport && ieee->pHTInfo->bEnableHT && ieee->pHTInfo->bCurBW40MHz) {
 317                 b40M = 1;
 318                 chan_offset = ieee->pHTInfo->CurSTAExtChnlOffset;
 319                 bandwidth = (HT_CHANNEL_WIDTH)ieee->pHTInfo->bCurBW40MHz;
 320                 printk("Scan in 40M, force to 20M first:%d, %d\n", chan_offset, bandwidth);
 321                 ieee->SetBWModeHandler(ieee->dev, HT_CHANNEL_WIDTH_20, HT_EXTCHNL_OFFSET_NO_EXT);
 322                 }
 323         ieee80211_start_scan_syncro(ieee);
 324         if (b40M) {
 325                 printk("Scan in 20M, back to 40M\n");
 326                 if (chan_offset == HT_EXTCHNL_OFFSET_UPPER)
 327                         ieee->set_chan(ieee->dev, chan + 2);
 328                 else if (chan_offset == HT_EXTCHNL_OFFSET_LOWER)
 329                         ieee->set_chan(ieee->dev, chan - 2);
 330                 else
 331                         ieee->set_chan(ieee->dev, chan);
 332                 ieee->SetBWModeHandler(ieee->dev, bandwidth, chan_offset);
 333         } else {
 334                 ieee->set_chan(ieee->dev, chan);
 335         }
 336
 337         ieee->InitialGainHandler(ieee->dev,IG_Restore);
 338         ieee->state = IEEE80211_LINKED;
 339         ieee->link_change(ieee->dev);
 340         // To prevent the immediately calling watch_dog after scan.
 341         if(ieee->LinkDetectInfo.NumRecvBcnInPeriod==0||ieee->LinkDetectInfo.NumRecvDataInPeriod==0 )
 342         {
 343                 ieee->LinkDetectInfo.NumRecvBcnInPeriod = 1;
 344                 ieee->LinkDetectInfo.NumRecvDataInPeriod= 1;
 345         }
 346         if (ieee->data_hard_resume)
 347                 ieee->data_hard_resume(ieee->dev);
 348
 349         if(ieee->iw_mode == IW_MODE_ADHOC || ieee->iw_mode == IW_MODE_MASTER)
 350                 ieee80211_start_send_beacons(ieee);
 351
 352         netif_carrier_on(ieee->dev);
 353         count = 0;
 354         up(&ieee->wx_sem);
 355
 356 }
 357
 358 int ieee80211_wx_set_scan(struct ieee80211_device *ieee, struct iw_request_info *a,
 359                              union iwreq_data *wrqu, char *b)
 360 {
 361         int ret = 0;
 362
 363         down(&ieee->wx_sem);
 364
 365         if (ieee->iw_mode == IW_MODE_MONITOR || !(ieee->proto_started)){
 366                 ret = -1;
 367                 goto out;
 368         }
 369
 370         if ( ieee->state == IEEE80211_LINKED){
 371                 queue_work(ieee->wq, &ieee->wx_sync_scan_wq);
 372                 /* intentionally forget to up sem */
 373                 return 0;
 374         }
 375
 376 out:
 377         up(&ieee->wx_sem);
 378         return ret;
 379 }
 380
 381 int ieee80211_wx_set_essid(struct ieee80211_device *ieee,
 382                               struct iw_request_info *a,
 383                               union iwreq_data *wrqu, char *extra)
 384 {
 385
 386         int ret=0,len;
 387         short proto_started;
 388         unsigned long flags;
 389
 390         ieee->sync_scan_hurryup = 1;
 391         down(&ieee->wx_sem);
 392
 393         proto_started = ieee->proto_started;
 394
 395         if (wrqu->essid.length > IW_ESSID_MAX_SIZE){
 396                 ret= -E2BIG;
 397                 goto out;
 398         }
 399
 400         if (ieee->iw_mode == IW_MODE_MONITOR){
 401                 ret= -1;
 402                 goto out;
 403         }
 404
 405         if(proto_started)
 406                 ieee80211_stop_protocol(ieee);
 407
 408
 409         /* this is just to be sure that the GET wx callback
 410          * has consisten infos. not needed otherwise
 411          */
 412         spin_lock_irqsave(&ieee->lock, flags);
 413
 414         if (wrqu->essid.flags && wrqu->essid.length) {
 415                 //first flush current network.ssid
 416                 len = ((wrqu->essid.length-1) < IW_ESSID_MAX_SIZE) ? (wrqu->essid.length-1) : IW_ESSID_MAX_SIZE;
 417                 strncpy(ieee->current_network.ssid, extra, len+1);
 418                 ieee->current_network.ssid_len = len+1;
 419                 ieee->ssid_set = 1;
 420         }
 421         else{
 422                 ieee->ssid_set = 0;
 423                 ieee->current_network.ssid[0] = '\0';
 424                 ieee->current_network.ssid_len = 0;
 425         }
 426         spin_unlock_irqrestore(&ieee->lock, flags);
 427
 428         if (proto_started)
 429                 ieee80211_start_protocol(ieee);
 430 out:
 431         up(&ieee->wx_sem);
 432         return ret;
 433 }
 434
 435  int ieee80211_wx_get_mode(struct ieee80211_device *ieee, struct iw_request_info *a,
 436                              union iwreq_data *wrqu, char *b)
 437 {
 438
 439         wrqu->mode = ieee->iw_mode;
 440         return 0;
 441 }
 442
 443  int ieee80211_wx_set_rawtx(struct ieee80211_device *ieee,
 444                                struct iw_request_info *info,
 445                                union iwreq_data *wrqu, char *extra)
 446 {
 447
 448         int *parms = (int *)extra;
 449         int enable = (parms[0] > 0);
 450         short prev = ieee->raw_tx;
 451
 452         down(&ieee->wx_sem);
 453
 454         if(enable)
 455                 ieee->raw_tx = 1;
 456         else
 457                 ieee->raw_tx = 0;
 458
 459         printk(KERN_INFO"raw TX is %s\n",
 460               ieee->raw_tx ? "enabled" : "disabled");
 461
 462         if(ieee->iw_mode == IW_MODE_MONITOR)
 463         {
 464                 if(prev == 0 && ieee->raw_tx){
 465                         if (ieee->data_hard_resume)
 466                                 ieee->data_hard_resume(ieee->dev);
 467
 468                         netif_carrier_on(ieee->dev);
 469                 }
 470
 471                 if(prev && ieee->raw_tx == 1)
 472                         netif_carrier_off(ieee->dev);
 473         }
 474
 475         up(&ieee->wx_sem);
 476
 477         return 0;
 478 }
 479
 480 int ieee80211_wx_get_name(struct ieee80211_device *ieee,
 481                              struct iw_request_info *info,
 482                              union iwreq_data *wrqu, char *extra)
 483 {
 484         strcpy(wrqu->name, "802.11");
 485         if(ieee->modulation & IEEE80211_CCK_MODULATION){
 486                 strcat(wrqu->name, "b");
 487                 if(ieee->modulation & IEEE80211_OFDM_MODULATION)
 488                         strcat(wrqu->name, "/g");
 489         }else if(ieee->modulation & IEEE80211_OFDM_MODULATION)
 490                 strcat(wrqu->name, "g");
 491         if (ieee->mode & (IEEE_N_24G | IEEE_N_5G))
 492                 strcat(wrqu->name, "/n");
 493
 494         if((ieee->state == IEEE80211_LINKED) ||
 495                 (ieee->state == IEEE80211_LINKED_SCANNING))
 496                 strcat(wrqu->name," linked");
 497         else if(ieee->state != IEEE80211_NOLINK)
 498                 strcat(wrqu->name," link..");
 499
 500
 501         return 0;
 502 }
 503
 504
 505 /* this is mostly stolen from hostap */
 506 int ieee80211_wx_set_power(struct ieee80211_device *ieee,
 507                                  struct iw_request_info *info,
 508                                  union iwreq_data *wrqu, char *extra)
 509 {
 510         int ret = 0;
 511         down(&ieee->wx_sem);
 512
 513         if (wrqu->power.disabled){
 514                 ieee->ps = IEEE80211_PS_DISABLED;
 515                 goto exit;
 516         }
 517         if (wrqu->power.flags & IW_POWER_TIMEOUT) {
 518                 //ieee->ps_period = wrqu->power.value / 1000;
 519                 ieee->ps_timeout = wrqu->power.value / 1000;
 520         }
 521
 522         if (wrqu->power.flags & IW_POWER_PERIOD) {
 523
 524                 //ieee->ps_timeout = wrqu->power.value / 1000;
 525                 ieee->ps_period = wrqu->power.value / 1000;
 526                 //wrq->value / 1024;
 527
 528         }
 529         switch (wrqu->power.flags & IW_POWER_MODE) {
 530         case IW_POWER_UNICAST_R:
 531                 ieee->ps = IEEE80211_PS_UNICAST;
 532                 break;
 533         case IW_POWER_MULTICAST_R:
 534                 ieee->ps = IEEE80211_PS_MBCAST;
 535                 break;
 536         case IW_POWER_ALL_R:
 537                 ieee->ps = IEEE80211_PS_UNICAST | IEEE80211_PS_MBCAST;
 538                 break;
 539
 540         case IW_POWER_ON:
 541         //      ieee->ps = IEEE80211_PS_DISABLED;
 542                 break;
 543
 544         default:
 545                 ret = -EINVAL;
 546                 goto exit;
 547
 548         }
 549 exit:
 550         up(&ieee->wx_sem);
 551         return ret;
 552
 553 }
 554
 555 /* this is stolen from hostap */
 556 int ieee80211_wx_get_power(struct ieee80211_device *ieee,
 557                                  struct iw_request_info *info,
 558                                  union iwreq_data *wrqu, char *extra)
 559 {
 560         int ret =0;
 561
 562         down(&ieee->wx_sem);
 563
 564         if(ieee->ps == IEEE80211_PS_DISABLED){
 565                 wrqu->power.disabled = 1;
 566                 goto exit;
 567         }
 568
 569         wrqu->power.disabled = 0;
 570
 571         if ((wrqu->power.flags & IW_POWER_TYPE) == IW_POWER_TIMEOUT) {
 572                 wrqu->power.flags = IW_POWER_TIMEOUT;
 573                 wrqu->power.value = ieee->ps_timeout * 1000;
 574         } else {
 575 //              ret = -EOPNOTSUPP;
 576 //              goto exit;
 577                 wrqu->power.flags = IW_POWER_PERIOD;
 578                 wrqu->power.value = ieee->ps_period * 1000;
 579 //ieee->current_network.dtim_period * ieee->current_network.beacon_interval * 1024;
 580         }
 581
 582        if ((ieee->ps & (IEEE80211_PS_MBCAST | IEEE80211_PS_UNICAST)) == (IEEE80211_PS_MBCAST | IEEE80211_PS_UNICAST))
 583                 wrqu->power.flags |= IW_POWER_ALL_R;
 584         else if (ieee->ps & IEEE80211_PS_MBCAST)
 585                 wrqu->power.flags |= IW_POWER_MULTICAST_R;
 586         else
 587                 wrqu->power.flags |= IW_POWER_UNICAST_R;
 588
 589 exit:
 590         up(&ieee->wx_sem);
 591         return ret;
 592
 593 }
 594 EXPORT_SYMBOL(ieee80211_wx_get_essid);
 595 EXPORT_SYMBOL(ieee80211_wx_set_essid);
 596 EXPORT_SYMBOL(ieee80211_wx_set_rate);
 597 EXPORT_SYMBOL(ieee80211_wx_get_rate);
 598 EXPORT_SYMBOL(ieee80211_wx_set_wap);
 599 EXPORT_SYMBOL(ieee80211_wx_get_wap);
 600 EXPORT_SYMBOL(ieee80211_wx_set_mode);
 601 EXPORT_SYMBOL(ieee80211_wx_get_mode);
 602 EXPORT_SYMBOL(ieee80211_wx_set_scan);
 603 EXPORT_SYMBOL(ieee80211_wx_get_freq);
 604 EXPORT_SYMBOL(ieee80211_wx_set_freq);
 605 EXPORT_SYMBOL(ieee80211_wx_set_rawtx);
 606 EXPORT_SYMBOL(ieee80211_wx_get_name);
 607 EXPORT_SYMBOL(ieee80211_wx_set_power);
 608 EXPORT_SYMBOL(ieee80211_wx_get_power);
 609 EXPORT_SYMBOL(ieee80211_wlan_frequencies);
 610 EXPORT_SYMBOL(ieee80211_wx_set_rts);
 611 EXPORT_SYMBOL(ieee80211_wx_get_rts);