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 <linux/etherdevice.h>
  18
  19 #include "ieee80211.h"
  20 #include "dot11d.h"
  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                 if (!(GET_DOT11D_INFO(ieee)->channel_map)[fwrq->m]) {
  67                         ret = -EINVAL;
  68                         goto out;
  69                 }
  70                 ieee->current_network.channel = fwrq->m;
  71                 ieee->set_chan(ieee->dev, ieee->current_network.channel);
  72
  73                 if(ieee->iw_mode == IW_MODE_ADHOC || ieee->iw_mode == IW_MODE_MASTER)
  74                         if(ieee->state == IEEE80211_LINKED){
  75
  76                         ieee80211_stop_send_beacons(ieee);
  77                         ieee80211_start_send_beacons(ieee);
  78                         }
  79         }
  80
  81         ret = 0;
  82 out:
  83         up(&ieee->wx_sem);
  84         return ret;
  85 }
  86
  87
  88 int ieee80211_wx_get_freq(struct ieee80211_device *ieee,
  89                              struct iw_request_info *a,
  90                              union iwreq_data *wrqu, char *b)
  91 {
  92         struct iw_freq *fwrq = & wrqu->freq;
  93
  94         if (ieee->current_network.channel == 0)
  95                 return -1;
  96         //NM 0.7.0 will not accept channel any more.
  97         fwrq->m = ieee80211_wlan_frequencies[ieee->current_network.channel-1] * 100000;
  98         fwrq->e = 1;
  99 //      fwrq->m = ieee->current_network.channel;
 100 //      fwrq->e = 0;
 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
 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 != IEEE80211_LINKED &&
 120                 ieee->state != IEEE80211_LINKED_SCANNING &&
 121                 ieee->wap_set == 0)
 122
 123                 memset(wrqu->ap_addr.sa_data, 0, ETH_ALEN);
 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
 133
 134 int ieee80211_wx_set_wap(struct ieee80211_device *ieee,
 135                          struct iw_request_info *info,
 136                          union iwreq_data *awrq,
 137                          char *extra)
 138 {
 139
 140         int ret = 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);
 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 = !is_zero_ether_addr(temp->sa_data);
 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);
 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;
 306         chan = ieee->current_network.channel;
 307         netif_carrier_off(ieee->dev);
 308
 309         if (ieee->data_hard_stop)
 310                 ieee->data_hard_stop(ieee->dev);
 311
 312         ieee80211_stop_send_beacons(ieee);
 313
 314         ieee->state = IEEE80211_LINKED_SCANNING;
 315         ieee->link_change(ieee->dev);
 316         ieee->InitialGainHandler(ieee->dev,IG_Backup);
 317         if (ieee->pHTInfo->bCurrentHTSupport && ieee->pHTInfo->bEnableHT && ieee->pHTInfo->bCurBW40MHz) {
 318                 b40M = 1;
 319                 chan_offset = ieee->pHTInfo->CurSTAExtChnlOffset;
 320                 bandwidth = (HT_CHANNEL_WIDTH)ieee->pHTInfo->bCurBW40MHz;
 321                 printk("Scan in 40M, force to 20M first:%d, %d\n", chan_offset, bandwidth);
 322                 ieee->SetBWModeHandler(ieee->dev, HT_CHANNEL_WIDTH_20, HT_EXTCHNL_OFFSET_NO_EXT);
 323                 }
 324         ieee80211_start_scan_syncro(ieee);
 325         if (b40M) {
 326                 printk("Scan in 20M, back to 40M\n");
 327                 if (chan_offset == HT_EXTCHNL_OFFSET_UPPER)
 328                         ieee->set_chan(ieee->dev, chan + 2);
 329                 else if (chan_offset == HT_EXTCHNL_OFFSET_LOWER)
 330                         ieee->set_chan(ieee->dev, chan - 2);
 331                 else
 332                         ieee->set_chan(ieee->dev, chan);
 333                 ieee->SetBWModeHandler(ieee->dev, bandwidth, chan_offset);
 334         } else {
 335                 ieee->set_chan(ieee->dev, chan);
 336         }
 337
 338         ieee->InitialGainHandler(ieee->dev,IG_Restore);
 339         ieee->state = IEEE80211_LINKED;
 340         ieee->link_change(ieee->dev);
 341         // To prevent the immediately calling watch_dog after scan.
 342         if(ieee->LinkDetectInfo.NumRecvBcnInPeriod==0||ieee->LinkDetectInfo.NumRecvDataInPeriod==0 )
 343         {
 344                 ieee->LinkDetectInfo.NumRecvBcnInPeriod = 1;
 345                 ieee->LinkDetectInfo.NumRecvDataInPeriod= 1;
 346         }
 347         if (ieee->data_hard_resume)
 348                 ieee->data_hard_resume(ieee->dev);
 349
 350         if(ieee->iw_mode == IW_MODE_ADHOC || ieee->iw_mode == IW_MODE_MASTER)
 351                 ieee80211_start_send_beacons(ieee);
 352
 353         netif_carrier_on(ieee->dev);
 354         count = 0;
 355         up(&ieee->wx_sem);
 356
 357 }
 358
 359 int ieee80211_wx_set_scan(struct ieee80211_device *ieee, struct iw_request_info *a,
 360                              union iwreq_data *wrqu, char *b)
 361 {
 362         int ret = 0;
 363
 364         down(&ieee->wx_sem);
 365
 366         if (ieee->iw_mode == IW_MODE_MONITOR || !(ieee->proto_started)){
 367                 ret = -1;
 368                 goto out;
 369         }
 370
 371         if ( ieee->state == IEEE80211_LINKED){
 372                 queue_work(ieee->wq, &ieee->wx_sync_scan_wq);
 373                 /* intentionally forget to up sem */
 374                 return 0;
 375         }
 376
 377 out:
 378         up(&ieee->wx_sem);
 379         return ret;
 380 }
 381
 382 int ieee80211_wx_set_essid(struct ieee80211_device *ieee,
 383                               struct iw_request_info *a,
 384                               union iwreq_data *wrqu, char *extra)
 385 {
 386
 387         int ret=0,len;
 388         short proto_started;
 389         unsigned long flags;
 390
 391         ieee->sync_scan_hurryup = 1;
 392         down(&ieee->wx_sem);
 393
 394         proto_started = ieee->proto_started;
 395
 396         if (wrqu->essid.length > IW_ESSID_MAX_SIZE){
 397                 ret= -E2BIG;
 398                 goto out;
 399         }
 400
 401         if (ieee->iw_mode == IW_MODE_MONITOR){
 402                 ret= -1;
 403                 goto out;
 404         }
 405
 406         if(proto_started)
 407                 ieee80211_stop_protocol(ieee);
 408
 409
 410         /* this is just to be sure that the GET wx callback
 411          * has consisten infos. not needed otherwise
 412          */
 413         spin_lock_irqsave(&ieee->lock, flags);
 414
 415         if (wrqu->essid.flags && wrqu->essid.length) {
 416                 //first flush current network.ssid
 417                 len = ((wrqu->essid.length-1) < IW_ESSID_MAX_SIZE) ? (wrqu->essid.length-1) : IW_ESSID_MAX_SIZE;
 418                 strncpy(ieee->current_network.ssid, extra, len+1);
 419                 ieee->current_network.ssid_len = len+1;
 420                 ieee->ssid_set = 1;
 421         }
 422         else{
 423                 ieee->ssid_set = 0;
 424                 ieee->current_network.ssid[0] = '\0';
 425                 ieee->current_network.ssid_len = 0;
 426         }
 427         spin_unlock_irqrestore(&ieee->lock, flags);
 428
 429         if (proto_started)
 430                 ieee80211_start_protocol(ieee);
 431 out:
 432         up(&ieee->wx_sem);
 433         return ret;
 434 }
 435
 436  int ieee80211_wx_get_mode(struct ieee80211_device *ieee, struct iw_request_info *a,
 437                              union iwreq_data *wrqu, char *b)
 438 {
 439
 440         wrqu->mode = ieee->iw_mode;
 441         return 0;
 442 }
 443
 444  int ieee80211_wx_set_rawtx(struct ieee80211_device *ieee,
 445                                struct iw_request_info *info,
 446                                union iwreq_data *wrqu, char *extra)
 447 {
 448
 449         int *parms = (int *)extra;
 450         int enable = (parms[0] > 0);
 451         short prev = ieee->raw_tx;
 452
 453         down(&ieee->wx_sem);
 454
 455         if(enable)
 456                 ieee->raw_tx = 1;
 457         else
 458                 ieee->raw_tx = 0;
 459
 460         printk(KERN_INFO"raw TX is %s\n",
 461               ieee->raw_tx ? "enabled" : "disabled");
 462
 463         if(ieee->iw_mode == IW_MODE_MONITOR)
 464         {
 465                 if(prev == 0 && ieee->raw_tx){
 466                         if (ieee->data_hard_resume)
 467                                 ieee->data_hard_resume(ieee->dev);
 468
 469                         netif_carrier_on(ieee->dev);
 470                 }
 471
 472                 if(prev && ieee->raw_tx == 1)
 473                         netif_carrier_off(ieee->dev);
 474         }
 475
 476         up(&ieee->wx_sem);
 477
 478         return 0;
 479 }
 480
 481 int ieee80211_wx_get_name(struct ieee80211_device *ieee,
 482                              struct iw_request_info *info,
 483                              union iwreq_data *wrqu, char *extra)
 484 {
 485         strlcpy(wrqu->name, "802.11", IFNAMSIZ);
 486         if (ieee->modulation & IEEE80211_CCK_MODULATION) {
 487                 strlcat(wrqu->name, "b", IFNAMSIZ);
 488                 if (ieee->modulation & IEEE80211_OFDM_MODULATION)
 489                         strlcat(wrqu->name, "/g", IFNAMSIZ);
 490         } else if (ieee->modulation & IEEE80211_OFDM_MODULATION) {
 491                 strlcat(wrqu->name, "g", IFNAMSIZ);
 492         }
 493
 494         if (ieee->mode & (IEEE_N_24G | IEEE_N_5G))
 495                 strlcat(wrqu->name, "/n", IFNAMSIZ);
 496
 497         if ((ieee->state == IEEE80211_LINKED) ||
 498             (ieee->state == IEEE80211_LINKED_SCANNING))
 499                 strlcat(wrqu->name, " linked", IFNAMSIZ);
 500         else if (ieee->state != IEEE80211_NOLINK)
 501                 strlcat(wrqu->name, " link..", IFNAMSIZ);
 502
 503         return 0;
 504 }
 505
 506
 507 /* this is mostly stolen from hostap */
 508 int ieee80211_wx_set_power(struct ieee80211_device *ieee,
 509                                  struct iw_request_info *info,
 510                                  union iwreq_data *wrqu, char *extra)
 511 {
 512         int ret = 0;
 513         down(&ieee->wx_sem);
 514
 515         if (wrqu->power.disabled){
 516                 ieee->ps = IEEE80211_PS_DISABLED;
 517                 goto exit;
 518         }
 519         if (wrqu->power.flags & IW_POWER_TIMEOUT) {
 520                 //ieee->ps_period = wrqu->power.value / 1000;
 521                 ieee->ps_timeout = wrqu->power.value / 1000;
 522         }
 523
 524         if (wrqu->power.flags & IW_POWER_PERIOD) {
 525
 526                 //ieee->ps_timeout = wrqu->power.value / 1000;
 527                 ieee->ps_period = wrqu->power.value / 1000;
 528                 //wrq->value / 1024;
 529
 530         }
 531         switch (wrqu->power.flags & IW_POWER_MODE) {
 532         case IW_POWER_UNICAST_R:
 533                 ieee->ps = IEEE80211_PS_UNICAST;
 534                 break;
 535         case IW_POWER_MULTICAST_R:
 536                 ieee->ps = IEEE80211_PS_MBCAST;
 537                 break;
 538         case IW_POWER_ALL_R:
 539                 ieee->ps = IEEE80211_PS_UNICAST | IEEE80211_PS_MBCAST;
 540                 break;
 541
 542         case IW_POWER_ON:
 543         //      ieee->ps = IEEE80211_PS_DISABLED;
 544                 break;
 545
 546         default:
 547                 ret = -EINVAL;
 548                 goto exit;
 549
 550         }
 551 exit:
 552         up(&ieee->wx_sem);
 553         return ret;
 554
 555 }
 556
 557 /* this is stolen from hostap */
 558 int ieee80211_wx_get_power(struct ieee80211_device *ieee,
 559                                  struct iw_request_info *info,
 560                                  union iwreq_data *wrqu, char *extra)
 561 {
 562         int ret =0;
 563
 564         down(&ieee->wx_sem);
 565
 566         if(ieee->ps == IEEE80211_PS_DISABLED){
 567                 wrqu->power.disabled = 1;
 568                 goto exit;
 569         }
 570
 571         wrqu->power.disabled = 0;
 572
 573         if ((wrqu->power.flags & IW_POWER_TYPE) == IW_POWER_TIMEOUT) {
 574                 wrqu->power.flags = IW_POWER_TIMEOUT;
 575                 wrqu->power.value = ieee->ps_timeout * 1000;
 576         } else {
 577 //              ret = -EOPNOTSUPP;
 578 //              goto exit;
 579                 wrqu->power.flags = IW_POWER_PERIOD;
 580                 wrqu->power.value = ieee->ps_period * 1000;
 581 //ieee->current_network.dtim_period * ieee->current_network.beacon_interval * 1024;
 582         }
 583
 584        if ((ieee->ps & (IEEE80211_PS_MBCAST | IEEE80211_PS_UNICAST)) == (IEEE80211_PS_MBCAST | IEEE80211_PS_UNICAST))
 585                 wrqu->power.flags |= IW_POWER_ALL_R;
 586         else if (ieee->ps & IEEE80211_PS_MBCAST)
 587                 wrqu->power.flags |= IW_POWER_MULTICAST_R;
 588         else
 589                 wrqu->power.flags |= IW_POWER_UNICAST_R;
 590
 591 exit:
 592         up(&ieee->wx_sem);
 593         return ret;
 594
 595 }
 596 EXPORT_SYMBOL(ieee80211_wx_get_essid);
 597 EXPORT_SYMBOL(ieee80211_wx_set_essid);
 598 EXPORT_SYMBOL(ieee80211_wx_set_rate);
 599 EXPORT_SYMBOL(ieee80211_wx_get_rate);
 600 EXPORT_SYMBOL(ieee80211_wx_set_wap);
 601 EXPORT_SYMBOL(ieee80211_wx_get_wap);
 602 EXPORT_SYMBOL(ieee80211_wx_set_mode);
 603 EXPORT_SYMBOL(ieee80211_wx_get_mode);
 604 EXPORT_SYMBOL(ieee80211_wx_set_scan);
 605 EXPORT_SYMBOL(ieee80211_wx_get_freq);
 606 EXPORT_SYMBOL(ieee80211_wx_set_freq);
 607 EXPORT_SYMBOL(ieee80211_wx_set_rawtx);
 608 EXPORT_SYMBOL(ieee80211_wx_get_name);
 609 EXPORT_SYMBOL(ieee80211_wx_set_power);
 610 EXPORT_SYMBOL(ieee80211_wx_get_power);
 611 EXPORT_SYMBOL(ieee80211_wlan_frequencies);
 612 EXPORT_SYMBOL(ieee80211_wx_set_rts);
 613 EXPORT_SYMBOL(ieee80211_wx_get_rts);