drivers/staging/rtl8192su/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 = 0;
 233         //printk("===>mode:%d, halfNmode:%d\n", ieee->mode, ieee->bHalfWirelessN24GMode);
 234         if (ieee->mode & (IEEE_A | IEEE_B | IEEE_G))
 235                 tmp_rate = ieee->rate;
 236         else if (ieee->mode & IEEE_N_5G)
 237                 tmp_rate = 580;
 238         else if (ieee->mode & IEEE_N_24G)
 239         {
 240                 if (ieee->GetHalfNmodeSupportByAPsHandler(ieee->dev))
 241                         tmp_rate = HTHalfMcsToDataRate(ieee, 15);
 242                 else
 243                         tmp_rate = HTMcsToDataRate(ieee, 15);
 244         }
 245         wrqu->bitrate.value = tmp_rate * 500000;
 246
 247         return 0;
 248 }
 249
 250
 251 int ieee80211_wx_set_rts(struct ieee80211_device *ieee,
 252                              struct iw_request_info *info,
 253                              union iwreq_data *wrqu, char *extra)
 254 {
 255         if (wrqu->rts.disabled || !wrqu->rts.fixed)
 256                 ieee->rts = DEFAULT_RTS_THRESHOLD;
 257         else
 258         {
 259                 if (wrqu->rts.value < MIN_RTS_THRESHOLD ||
 260                                 wrqu->rts.value > MAX_RTS_THRESHOLD)
 261                         return -EINVAL;
 262                 ieee->rts = wrqu->rts.value;
 263         }
 264         return 0;
 265 }
 266
 267 int ieee80211_wx_get_rts(struct ieee80211_device *ieee,
 268                              struct iw_request_info *info,
 269                              union iwreq_data *wrqu, char *extra)
 270 {
 271         wrqu->rts.value = ieee->rts;
 272         wrqu->rts.fixed = 0;    /* no auto select */
 273         wrqu->rts.disabled = (wrqu->rts.value == DEFAULT_RTS_THRESHOLD);
 274         return 0;
 275 }
 276 int ieee80211_wx_set_mode(struct ieee80211_device *ieee, struct iw_request_info *a,
 277                              union iwreq_data *wrqu, char *b)
 278 {
 279
 280         ieee->sync_scan_hurryup = 1;
 281
 282         down(&ieee->wx_sem);
 283
 284         if (wrqu->mode == ieee->iw_mode)
 285                 goto out;
 286
 287         if (wrqu->mode == IW_MODE_MONITOR){
 288
 289                 ieee->dev->type = ARPHRD_IEEE80211;
 290         }else{
 291                 ieee->dev->type = ARPHRD_ETHER;
 292         }
 293
 294         if (!ieee->proto_started){
 295                 ieee->iw_mode = wrqu->mode;
 296         }else{
 297                 ieee80211_stop_protocol(ieee);
 298                 ieee->iw_mode = wrqu->mode;
 299                 ieee80211_start_protocol(ieee);
 300         }
 301
 302 out:
 303         up(&ieee->wx_sem);
 304         return 0;
 305 }
 306
 307 void ieee80211_wx_sync_scan_wq(struct work_struct *work)
 308 {
 309         struct ieee80211_device *ieee = container_of(work, struct ieee80211_device, wx_sync_scan_wq);
 310         short chan;
 311         HT_EXTCHNL_OFFSET chan_offset=0;
 312         HT_CHANNEL_WIDTH bandwidth=0;
 313         int b40M = 0;
 314         static int count = 0;
 315         chan = ieee->current_network.channel;
 316         netif_carrier_off(ieee->dev);
 317
 318         if (ieee->data_hard_stop)
 319                 ieee->data_hard_stop(ieee->dev);
 320
 321         ieee80211_stop_send_beacons(ieee);
 322
 323         ieee->state = IEEE80211_LINKED_SCANNING;
 324         ieee->link_change(ieee->dev);
 325         ieee->InitialGainHandler(ieee->dev,IG_Backup);
 326         if (ieee->SetFwCmdHandler)
 327         {
 328                 ieee->SetFwCmdHandler(ieee->dev, FW_CMD_DIG_HALT);
 329                 ieee->SetFwCmdHandler(ieee->dev, FW_CMD_HIGH_PWR_DISABLE);
 330         }
 331         if (ieee->pHTInfo->bCurrentHTSupport && ieee->pHTInfo->bEnableHT && ieee->pHTInfo->bCurBW40MHz) {
 332                 b40M = 1;
 333                 chan_offset = ieee->pHTInfo->CurSTAExtChnlOffset;
 334                 bandwidth = (HT_CHANNEL_WIDTH)ieee->pHTInfo->bCurBW40MHz;
 335                 printk("Scan in 40M, force to 20M first:%d, %d\n", chan_offset, bandwidth);
 336                 ieee->SetBWModeHandler(ieee->dev, HT_CHANNEL_WIDTH_20, HT_EXTCHNL_OFFSET_NO_EXT);
 337                 }
 338         ieee80211_start_scan_syncro(ieee);
 339         if (b40M) {
 340                 printk("Scan in 20M, back to 40M\n");
 341                 if (chan_offset == HT_EXTCHNL_OFFSET_UPPER)
 342                         ieee->set_chan(ieee->dev, chan + 2);
 343                 else if (chan_offset == HT_EXTCHNL_OFFSET_LOWER)
 344                         ieee->set_chan(ieee->dev, chan - 2);
 345                 else
 346                         ieee->set_chan(ieee->dev, chan);
 347                 ieee->SetBWModeHandler(ieee->dev, bandwidth, chan_offset);
 348         } else {
 349                 ieee->set_chan(ieee->dev, chan);
 350         }
 351
 352         ieee->InitialGainHandler(ieee->dev,IG_Restore);
 353         if (ieee->SetFwCmdHandler)
 354         {
 355                 ieee->SetFwCmdHandler(ieee->dev, FW_CMD_DIG_RESUME);
 356                 ieee->SetFwCmdHandler(ieee->dev, FW_CMD_HIGH_PWR_ENABLE);
 357         }
 358         ieee->state = IEEE80211_LINKED;
 359         ieee->link_change(ieee->dev);
 360         // To prevent the immediately calling watch_dog after scan.
 361         if(ieee->LinkDetectInfo.NumRecvBcnInPeriod==0||ieee->LinkDetectInfo.NumRecvDataInPeriod==0 )
 362         {
 363                 ieee->LinkDetectInfo.NumRecvBcnInPeriod = 1;
 364                 ieee->LinkDetectInfo.NumRecvDataInPeriod= 1;
 365         }
 366         if (ieee->data_hard_resume)
 367                 ieee->data_hard_resume(ieee->dev);
 368
 369         if(ieee->iw_mode == IW_MODE_ADHOC || ieee->iw_mode == IW_MODE_MASTER)
 370                 ieee80211_start_send_beacons(ieee);
 371
 372         netif_carrier_on(ieee->dev);
 373         count = 0;
 374         up(&ieee->wx_sem);
 375
 376 }
 377
 378 int ieee80211_wx_set_scan(struct ieee80211_device *ieee, struct iw_request_info *a,
 379                              union iwreq_data *wrqu, char *b)
 380 {
 381         int ret = 0;
 382
 383         down(&ieee->wx_sem);
 384
 385         if (ieee->iw_mode == IW_MODE_MONITOR || !(ieee->proto_started)){
 386                 ret = -1;
 387                 goto out;
 388         }
 389
 390         if ( ieee->state == IEEE80211_LINKED){
 391                 queue_work(ieee->wq, &ieee->wx_sync_scan_wq);
 392                 /* intentionally forget to up sem */
 393                 return 0;
 394         }
 395
 396 out:
 397         up(&ieee->wx_sem);
 398         return ret;
 399 }
 400
 401 int ieee80211_wx_set_essid(struct ieee80211_device *ieee,
 402                               struct iw_request_info *a,
 403                               union iwreq_data *wrqu, char *extra)
 404 {
 405
 406         int ret=0,len;
 407         short proto_started;
 408         unsigned long flags;
 409
 410         ieee->sync_scan_hurryup = 1;
 411         down(&ieee->wx_sem);
 412
 413         proto_started = ieee->proto_started;
 414
 415         if (wrqu->essid.length > IW_ESSID_MAX_SIZE){
 416                 ret= -E2BIG;
 417                 goto out;
 418         }
 419
 420         if (ieee->iw_mode == IW_MODE_MONITOR){
 421                 ret= -1;
 422                 goto out;
 423         }
 424
 425         if(proto_started)
 426                 ieee80211_stop_protocol(ieee);
 427
 428
 429         /* this is just to be sure that the GET wx callback
 430          * has consisten infos. not needed otherwise
 431          */
 432         spin_lock_irqsave(&ieee->lock, flags);
 433
 434         if (wrqu->essid.flags && wrqu->essid.length) {
 435                 //first flush current network.ssid
 436                 len = ((wrqu->essid.length-1) < IW_ESSID_MAX_SIZE) ? (wrqu->essid.length-1) : IW_ESSID_MAX_SIZE;
 437                 strncpy(ieee->current_network.ssid, extra, len+1);
 438                 ieee->current_network.ssid_len = len+1;
 439                 ieee->ssid_set = 1;
 440         }
 441         else{
 442                 ieee->ssid_set = 0;
 443                 ieee->current_network.ssid[0] = '\0';
 444                 ieee->current_network.ssid_len = 0;
 445         }
 446         spin_unlock_irqrestore(&ieee->lock, flags);
 447
 448         if (proto_started)
 449                 ieee80211_start_protocol(ieee);
 450 out:
 451         up(&ieee->wx_sem);
 452         return ret;
 453 }
 454
 455  int ieee80211_wx_get_mode(struct ieee80211_device *ieee, struct iw_request_info *a,
 456                              union iwreq_data *wrqu, char *b)
 457 {
 458
 459         wrqu->mode = ieee->iw_mode;
 460         return 0;
 461 }
 462
 463  int ieee80211_wx_set_rawtx(struct ieee80211_device *ieee,
 464                                struct iw_request_info *info,
 465                                union iwreq_data *wrqu, char *extra)
 466 {
 467
 468         int *parms = (int *)extra;
 469         int enable = (parms[0] > 0);
 470         short prev = ieee->raw_tx;
 471
 472         down(&ieee->wx_sem);
 473
 474         if(enable)
 475                 ieee->raw_tx = 1;
 476         else
 477                 ieee->raw_tx = 0;
 478
 479         printk(KERN_INFO"raw TX is %s\n",
 480               ieee->raw_tx ? "enabled" : "disabled");
 481
 482         if(ieee->iw_mode == IW_MODE_MONITOR)
 483         {
 484                 if(prev == 0 && ieee->raw_tx){
 485                         if (ieee->data_hard_resume)
 486                                 ieee->data_hard_resume(ieee->dev);
 487
 488                         netif_carrier_on(ieee->dev);
 489                 }
 490
 491                 if(prev && ieee->raw_tx == 1)
 492                         netif_carrier_off(ieee->dev);
 493         }
 494
 495         up(&ieee->wx_sem);
 496
 497         return 0;
 498 }
 499
 500 int ieee80211_wx_get_name(struct ieee80211_device *ieee,
 501                              struct iw_request_info *info,
 502                              union iwreq_data *wrqu, char *extra)
 503 {
 504         strlcpy(wrqu->name, "802.11", IFNAMSIZ);
 505         if(ieee->modulation & IEEE80211_CCK_MODULATION){
 506                 strlcat(wrqu->name, "b", IFNAMSIZ);
 507                 if(ieee->modulation & IEEE80211_OFDM_MODULATION)
 508                         strlcat(wrqu->name, "/g", IFNAMSIZ);
 509         }else if(ieee->modulation & IEEE80211_OFDM_MODULATION)
 510                 strlcat(wrqu->name, "g", IFNAMSIZ);
 511         if (ieee->mode & (IEEE_N_24G | IEEE_N_5G))
 512                 strlcat(wrqu->name, "/n", IFNAMSIZ);
 513
 514         if((ieee->state == IEEE80211_LINKED) ||
 515                 (ieee->state == IEEE80211_LINKED_SCANNING))
 516                 strlcat(wrqu->name, "  link", IFNAMSIZ);
 517         else if(ieee->state != IEEE80211_NOLINK)
 518                 strlcat(wrqu->name, " .....", IFNAMSIZ);
 519
 520
 521         return 0;
 522 }
 523
 524
 525 /* this is mostly stolen from hostap */
 526 int ieee80211_wx_set_power(struct ieee80211_device *ieee,
 527                                  struct iw_request_info *info,
 528                                  union iwreq_data *wrqu, char *extra)
 529 {
 530         int ret = 0;
 531 #if 1
 532         if(
 533                 (!ieee->sta_wake_up) ||
 534         //      (!ieee->ps_request_tx_ack) ||
 535                 (!ieee->enter_sleep_state) ||
 536                 (!ieee->ps_is_queue_empty)){
 537
 538         //      printk("ERROR. PS mode is tryied to be use but driver missed a callback\n\n");
 539
 540                 return -1;
 541         }
 542 #endif
 543         down(&ieee->wx_sem);
 544
 545         if (wrqu->power.disabled){
 546                 ieee->ps = IEEE80211_PS_DISABLED;
 547                 goto exit;
 548         }
 549         if (wrqu->power.flags & IW_POWER_TIMEOUT) {
 550                 //ieee->ps_period = wrqu->power.value / 1000;
 551                 ieee->ps_timeout = wrqu->power.value / 1000;
 552         }
 553
 554         if (wrqu->power.flags & IW_POWER_PERIOD) {
 555
 556                 //ieee->ps_timeout = wrqu->power.value / 1000;
 557                 ieee->ps_period = wrqu->power.value / 1000;
 558                 //wrq->value / 1024;
 559
 560         }
 561         switch (wrqu->power.flags & IW_POWER_MODE) {
 562         case IW_POWER_UNICAST_R:
 563                 ieee->ps = IEEE80211_PS_UNICAST;
 564                 break;
 565         case IW_POWER_MULTICAST_R:
 566                 ieee->ps = IEEE80211_PS_MBCAST;
 567                 break;
 568         case IW_POWER_ALL_R:
 569                 ieee->ps = IEEE80211_PS_UNICAST | IEEE80211_PS_MBCAST;
 570                 break;
 571
 572         case IW_POWER_ON:
 573         //      ieee->ps = IEEE80211_PS_DISABLED;
 574                 break;
 575
 576         default:
 577                 ret = -EINVAL;
 578                 goto exit;
 579
 580         }
 581 exit:
 582         up(&ieee->wx_sem);
 583         return ret;
 584
 585 }
 586
 587 /* this is stolen from hostap */
 588 int ieee80211_wx_get_power(struct ieee80211_device *ieee,
 589                                  struct iw_request_info *info,
 590                                  union iwreq_data *wrqu, char *extra)
 591 {
 592         int ret =0;
 593
 594         down(&ieee->wx_sem);
 595
 596         if(ieee->ps == IEEE80211_PS_DISABLED){
 597                 wrqu->power.disabled = 1;
 598                 goto exit;
 599         }
 600
 601         wrqu->power.disabled = 0;
 602
 603         if ((wrqu->power.flags & IW_POWER_TYPE) == IW_POWER_TIMEOUT) {
 604                 wrqu->power.flags = IW_POWER_TIMEOUT;
 605                 wrqu->power.value = ieee->ps_timeout * 1000;
 606         } else {
 607 //              ret = -EOPNOTSUPP;
 608 //              goto exit;
 609                 wrqu->power.flags = IW_POWER_PERIOD;
 610                 wrqu->power.value = ieee->ps_period * 1000;
 611 //ieee->current_network.dtim_period * ieee->current_network.beacon_interval * 1024;
 612         }
 613
 614        if ((ieee->ps & (IEEE80211_PS_MBCAST | IEEE80211_PS_UNICAST)) == (IEEE80211_PS_MBCAST | IEEE80211_PS_UNICAST))
 615                 wrqu->power.flags |= IW_POWER_ALL_R;
 616         else if (ieee->ps & IEEE80211_PS_MBCAST)
 617                 wrqu->power.flags |= IW_POWER_MULTICAST_R;
 618         else
 619                 wrqu->power.flags |= IW_POWER_UNICAST_R;
 620
 621 exit:
 622         up(&ieee->wx_sem);
 623         return ret;
 624
 625 }