drivers/staging/rtl8192u/ieee80211/ieee80211_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 "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 EXPORT_SYMBOL(ieee80211_wlan_frequencies);
  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 EXPORT_SYMBOL(ieee80211_wx_set_freq);
  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 EXPORT_SYMBOL(ieee80211_wx_get_freq);
 105
 106 int ieee80211_wx_get_wap(struct ieee80211_device *ieee,
 107                             struct iw_request_info *info,
 108                             union iwreq_data *wrqu, char *extra)
 109 {
 110         unsigned long flags;
 111
 112         wrqu->ap_addr.sa_family = ARPHRD_ETHER;
 113
 114         if (ieee->iw_mode == IW_MODE_MONITOR)
 115                 return -1;
 116
 117         /* We want avoid to give to the user inconsistent infos*/
 118         spin_lock_irqsave(&ieee->lock, flags);
 119
 120         if (ieee->state != IEEE80211_LINKED &&
 121                 ieee->state != IEEE80211_LINKED_SCANNING &&
 122                 ieee->wap_set == 0)
 123
 124                 eth_zero_addr(wrqu->ap_addr.sa_data);
 125         else
 126                 memcpy(wrqu->ap_addr.sa_data,
 127                        ieee->current_network.bssid, ETH_ALEN);
 128
 129         spin_unlock_irqrestore(&ieee->lock, flags);
 130
 131         return 0;
 132 }
 133 EXPORT_SYMBOL(ieee80211_wx_get_wap);
 134
 135 int ieee80211_wx_set_wap(struct ieee80211_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;//dev->flags & IFF_UP;
 145         struct sockaddr *temp = (struct sockaddr *)awrq;
 146
 147         ieee->sync_scan_hurryup = 1;
 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 (ifup)
 162                 ieee80211_stop_protocol(ieee);
 163
 164         /* just to avoid to give inconsistent infos in the
 165          * get wx method. not really needed otherwise
 166          */
 167         spin_lock_irqsave(&ieee->lock, flags);
 168
 169         memcpy(ieee->current_network.bssid, temp->sa_data, ETH_ALEN);
 170         ieee->wap_set = !is_zero_ether_addr(temp->sa_data);
 171
 172         spin_unlock_irqrestore(&ieee->lock, flags);
 173
 174         if (ifup)
 175                 ieee80211_start_protocol(ieee);
 176 out:
 177         up(&ieee->wx_sem);
 178         return ret;
 179 }
 180 EXPORT_SYMBOL(ieee80211_wx_set_wap);
 181
 182  int ieee80211_wx_get_essid(struct ieee80211_device *ieee, struct iw_request_info *a,union iwreq_data *wrqu,char *b)
 183 {
 184         int len, ret = 0;
 185         unsigned long flags;
 186
 187         if (ieee->iw_mode == IW_MODE_MONITOR)
 188                 return -1;
 189
 190         /* We want avoid to give to the user inconsistent infos*/
 191         spin_lock_irqsave(&ieee->lock, flags);
 192
 193         if (ieee->current_network.ssid[0] == '\0' ||
 194                 ieee->current_network.ssid_len == 0) {
 195                 ret = -1;
 196                 goto out;
 197         }
 198
 199         if (ieee->state != IEEE80211_LINKED &&
 200                 ieee->state != IEEE80211_LINKED_SCANNING &&
 201                 ieee->ssid_set == 0) {
 202                 ret = -1;
 203                 goto out;
 204         }
 205         len = ieee->current_network.ssid_len;
 206         wrqu->essid.length = len;
 207         strncpy(b, ieee->current_network.ssid, len);
 208         wrqu->essid.flags = 1;
 209
 210 out:
 211         spin_unlock_irqrestore(&ieee->lock, flags);
 212
 213         return ret;
 214
 215 }
 216 EXPORT_SYMBOL(ieee80211_wx_get_essid);
 217
 218 int ieee80211_wx_set_rate(struct ieee80211_device *ieee,
 219                              struct iw_request_info *info,
 220                              union iwreq_data *wrqu, char *extra)
 221 {
 222
 223         u32 target_rate = wrqu->bitrate.value;
 224
 225         ieee->rate = target_rate/100000;
 226         //FIXME: we might want to limit rate also in management protocols.
 227         return 0;
 228 }
 229 EXPORT_SYMBOL(ieee80211_wx_set_rate);
 230
 231 int ieee80211_wx_get_rate(struct ieee80211_device *ieee,
 232                              struct iw_request_info *info,
 233                              union iwreq_data *wrqu, char *extra)
 234 {
 235         u32 tmp_rate;
 236         tmp_rate = TxCountToDataRate(ieee, ieee->softmac_stats.CurrentShowTxate);
 237
 238         wrqu->bitrate.value = tmp_rate * 500000;
 239
 240         return 0;
 241 }
 242 EXPORT_SYMBOL(ieee80211_wx_get_rate);
 243
 244 int ieee80211_wx_set_rts(struct ieee80211_device *ieee,
 245                              struct iw_request_info *info,
 246                              union iwreq_data *wrqu, char *extra)
 247 {
 248         if (wrqu->rts.disabled || !wrqu->rts.fixed)
 249                 ieee->rts = DEFAULT_RTS_THRESHOLD;
 250         else
 251         {
 252                 if (wrqu->rts.value < MIN_RTS_THRESHOLD ||
 253                                 wrqu->rts.value > MAX_RTS_THRESHOLD)
 254                         return -EINVAL;
 255                 ieee->rts = wrqu->rts.value;
 256         }
 257         return 0;
 258 }
 259 EXPORT_SYMBOL(ieee80211_wx_set_rts);
 260
 261 int ieee80211_wx_get_rts(struct ieee80211_device *ieee,
 262                              struct iw_request_info *info,
 263                              union iwreq_data *wrqu, char *extra)
 264 {
 265         wrqu->rts.value = ieee->rts;
 266         wrqu->rts.fixed = 0;    /* no auto select */
 267         wrqu->rts.disabled = (wrqu->rts.value == DEFAULT_RTS_THRESHOLD);
 268         return 0;
 269 }
 270 EXPORT_SYMBOL(ieee80211_wx_get_rts);
 271
 272 int ieee80211_wx_set_mode(struct ieee80211_device *ieee, struct iw_request_info *a,
 273                              union iwreq_data *wrqu, char *b)
 274 {
 275
 276         ieee->sync_scan_hurryup = 1;
 277
 278         down(&ieee->wx_sem);
 279
 280         if (wrqu->mode == ieee->iw_mode)
 281                 goto out;
 282
 283         if (wrqu->mode == IW_MODE_MONITOR) {
 284
 285                 ieee->dev->type = ARPHRD_IEEE80211;
 286         } else {
 287                 ieee->dev->type = ARPHRD_ETHER;
 288         }
 289
 290         if (!ieee->proto_started) {
 291                 ieee->iw_mode = wrqu->mode;
 292         } else {
 293                 ieee80211_stop_protocol(ieee);
 294                 ieee->iw_mode = wrqu->mode;
 295                 ieee80211_start_protocol(ieee);
 296         }
 297
 298 out:
 299         up(&ieee->wx_sem);
 300         return 0;
 301 }
 302 EXPORT_SYMBOL(ieee80211_wx_set_mode);
 303
 304 void ieee80211_wx_sync_scan_wq(struct work_struct *work)
 305 {
 306         struct ieee80211_device *ieee = container_of(work, struct ieee80211_device, wx_sync_scan_wq);
 307         short chan;
 308         HT_EXTCHNL_OFFSET chan_offset=0;
 309         HT_CHANNEL_WIDTH bandwidth=0;
 310         int b40M = 0;
 311         chan = ieee->current_network.channel;
 312         netif_carrier_off(ieee->dev);
 313
 314         if (ieee->data_hard_stop)
 315                 ieee->data_hard_stop(ieee->dev);
 316
 317         ieee80211_stop_send_beacons(ieee);
 318
 319         ieee->state = IEEE80211_LINKED_SCANNING;
 320         ieee->link_change(ieee->dev);
 321         ieee->InitialGainHandler(ieee->dev, IG_Backup);
 322         if (ieee->pHTInfo->bCurrentHTSupport && ieee->pHTInfo->bEnableHT && ieee->pHTInfo->bCurBW40MHz) {
 323                 b40M = 1;
 324                 chan_offset = ieee->pHTInfo->CurSTAExtChnlOffset;
 325                 bandwidth = (HT_CHANNEL_WIDTH)ieee->pHTInfo->bCurBW40MHz;
 326                 printk("Scan in 40M, force to 20M first:%d, %d\n", chan_offset, bandwidth);
 327                 ieee->SetBWModeHandler(ieee->dev, HT_CHANNEL_WIDTH_20, HT_EXTCHNL_OFFSET_NO_EXT);
 328                 }
 329         ieee80211_start_scan_syncro(ieee);
 330         if (b40M) {
 331                 printk("Scan in 20M, back to 40M\n");
 332                 if (chan_offset == HT_EXTCHNL_OFFSET_UPPER)
 333                         ieee->set_chan(ieee->dev, chan + 2);
 334                 else if (chan_offset == HT_EXTCHNL_OFFSET_LOWER)
 335                         ieee->set_chan(ieee->dev, chan - 2);
 336                 else
 337                         ieee->set_chan(ieee->dev, chan);
 338                 ieee->SetBWModeHandler(ieee->dev, bandwidth, chan_offset);
 339         } else {
 340                 ieee->set_chan(ieee->dev, chan);
 341         }
 342
 343         ieee->InitialGainHandler(ieee->dev, IG_Restore);
 344         ieee->state = IEEE80211_LINKED;
 345         ieee->link_change(ieee->dev);
 346         // To prevent the immediately calling watch_dog after scan.
 347         if (ieee->LinkDetectInfo.NumRecvBcnInPeriod==0||ieee->LinkDetectInfo.NumRecvDataInPeriod==0)
 348         {
 349                 ieee->LinkDetectInfo.NumRecvBcnInPeriod = 1;
 350                 ieee->LinkDetectInfo.NumRecvDataInPeriod= 1;
 351         }
 352         if (ieee->data_hard_resume)
 353                 ieee->data_hard_resume(ieee->dev);
 354
 355         if (ieee->iw_mode == IW_MODE_ADHOC || ieee->iw_mode == IW_MODE_MASTER)
 356                 ieee80211_start_send_beacons(ieee);
 357
 358         netif_carrier_on(ieee->dev);
 359         up(&ieee->wx_sem);
 360
 361 }
 362
 363 int ieee80211_wx_set_scan(struct ieee80211_device *ieee, struct iw_request_info *a,
 364                              union iwreq_data *wrqu, char *b)
 365 {
 366         int ret = 0;
 367
 368         down(&ieee->wx_sem);
 369
 370         if (ieee->iw_mode == IW_MODE_MONITOR || !(ieee->proto_started)) {
 371                 ret = -1;
 372                 goto out;
 373         }
 374
 375         if (ieee->state == IEEE80211_LINKED) {
 376                 queue_work(ieee->wq, &ieee->wx_sync_scan_wq);
 377                 /* intentionally forget to up sem */
 378                 return 0;
 379         }
 380
 381 out:
 382         up(&ieee->wx_sem);
 383         return ret;
 384 }
 385 EXPORT_SYMBOL(ieee80211_wx_set_scan);
 386
 387 int ieee80211_wx_set_essid(struct ieee80211_device *ieee,
 388                               struct iw_request_info *a,
 389                               union iwreq_data *wrqu, char *extra)
 390 {
 391
 392         int ret = 0, len;
 393         short proto_started;
 394         unsigned long flags;
 395
 396         ieee->sync_scan_hurryup = 1;
 397         down(&ieee->wx_sem);
 398
 399         proto_started = ieee->proto_started;
 400
 401         if (wrqu->essid.length > IW_ESSID_MAX_SIZE) {
 402                 ret= -E2BIG;
 403                 goto out;
 404         }
 405
 406         if (ieee->iw_mode == IW_MODE_MONITOR) {
 407                 ret= -1;
 408                 goto out;
 409         }
 410
 411         if (proto_started)
 412                 ieee80211_stop_protocol(ieee);
 413
 414
 415         /* this is just to be sure that the GET wx callback
 416          * has consisten infos. not needed otherwise
 417          */
 418         spin_lock_irqsave(&ieee->lock, flags);
 419
 420         if (wrqu->essid.flags && wrqu->essid.length) {
 421                 //first flush current network.ssid
 422                 len = ((wrqu->essid.length-1) < IW_ESSID_MAX_SIZE) ? (wrqu->essid.length-1) : IW_ESSID_MAX_SIZE;
 423                 strncpy(ieee->current_network.ssid, extra, len+1);
 424                 ieee->current_network.ssid_len = len+1;
 425                 ieee->ssid_set = 1;
 426         }
 427         else {
 428                 ieee->ssid_set = 0;
 429                 ieee->current_network.ssid[0] = '\0';
 430                 ieee->current_network.ssid_len = 0;
 431         }
 432         spin_unlock_irqrestore(&ieee->lock, flags);
 433
 434         if (proto_started)
 435                 ieee80211_start_protocol(ieee);
 436 out:
 437         up(&ieee->wx_sem);
 438         return ret;
 439 }
 440 EXPORT_SYMBOL(ieee80211_wx_set_essid);
 441
 442  int ieee80211_wx_get_mode(struct ieee80211_device *ieee, struct iw_request_info *a,
 443                              union iwreq_data *wrqu, char *b)
 444 {
 445
 446         wrqu->mode = ieee->iw_mode;
 447         return 0;
 448 }
 449 EXPORT_SYMBOL(ieee80211_wx_get_mode);
 450
 451  int ieee80211_wx_set_rawtx(struct ieee80211_device *ieee,
 452                                struct iw_request_info *info,
 453                                union iwreq_data *wrqu, char *extra)
 454 {
 455
 456         int *parms = (int *)extra;
 457         int enable = (parms[0] > 0);
 458         short prev = ieee->raw_tx;
 459
 460         down(&ieee->wx_sem);
 461
 462         if (enable)
 463                 ieee->raw_tx = 1;
 464         else
 465                 ieee->raw_tx = 0;
 466
 467         printk(KERN_INFO"raw TX is %s\n",
 468               ieee->raw_tx ? "enabled" : "disabled");
 469
 470         if (ieee->iw_mode == IW_MODE_MONITOR)
 471         {
 472                 if (prev == 0 && ieee->raw_tx) {
 473                         if (ieee->data_hard_resume)
 474                                 ieee->data_hard_resume(ieee->dev);
 475
 476                         netif_carrier_on(ieee->dev);
 477                 }
 478
 479                 if (prev && ieee->raw_tx == 1)
 480                         netif_carrier_off(ieee->dev);
 481         }
 482
 483         up(&ieee->wx_sem);
 484
 485         return 0;
 486 }
 487 EXPORT_SYMBOL(ieee80211_wx_set_rawtx);
 488
 489 int ieee80211_wx_get_name(struct ieee80211_device *ieee,
 490                              struct iw_request_info *info,
 491                              union iwreq_data *wrqu, char *extra)
 492 {
 493         strlcpy(wrqu->name, "802.11", IFNAMSIZ);
 494         if (ieee->modulation & IEEE80211_CCK_MODULATION) {
 495                 strlcat(wrqu->name, "b", IFNAMSIZ);
 496                 if (ieee->modulation & IEEE80211_OFDM_MODULATION)
 497                         strlcat(wrqu->name, "/g", IFNAMSIZ);
 498         } else if (ieee->modulation & IEEE80211_OFDM_MODULATION) {
 499                 strlcat(wrqu->name, "g", IFNAMSIZ);
 500         }
 501
 502         if (ieee->mode & (IEEE_N_24G | IEEE_N_5G))
 503                 strlcat(wrqu->name, "/n", IFNAMSIZ);
 504
 505         if ((ieee->state == IEEE80211_LINKED) ||
 506             (ieee->state == IEEE80211_LINKED_SCANNING))
 507                 strlcat(wrqu->name, " linked", IFNAMSIZ);
 508         else if (ieee->state != IEEE80211_NOLINK)
 509                 strlcat(wrqu->name, " link..", IFNAMSIZ);
 510
 511         return 0;
 512 }
 513 EXPORT_SYMBOL(ieee80211_wx_get_name);
 514
 515 /* this is mostly stolen from hostap */
 516 int ieee80211_wx_set_power(struct ieee80211_device *ieee,
 517                                  struct iw_request_info *info,
 518                                  union iwreq_data *wrqu, char *extra)
 519 {
 520         int ret = 0;
 521         down(&ieee->wx_sem);
 522
 523         if (wrqu->power.disabled) {
 524                 ieee->ps = IEEE80211_PS_DISABLED;
 525                 goto exit;
 526         }
 527         if (wrqu->power.flags & IW_POWER_TIMEOUT) {
 528                 //ieee->ps_period = wrqu->power.value / 1000;
 529                 ieee->ps_timeout = wrqu->power.value / 1000;
 530         }
 531
 532         if (wrqu->power.flags & IW_POWER_PERIOD) {
 533
 534                 //ieee->ps_timeout = wrqu->power.value / 1000;
 535                 ieee->ps_period = wrqu->power.value / 1000;
 536                 //wrq->value / 1024;
 537
 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         //      ieee->ps = IEEE80211_PS_DISABLED;
 552                 break;
 553
 554         default:
 555                 ret = -EINVAL;
 556                 goto exit;
 557
 558         }
 559 exit:
 560         up(&ieee->wx_sem);
 561         return ret;
 562
 563 }
 564 EXPORT_SYMBOL(ieee80211_wx_set_power);
 565
 566 /* this is stolen from hostap */
 567 int ieee80211_wx_get_power(struct ieee80211_device *ieee,
 568                                  struct iw_request_info *info,
 569                                  union iwreq_data *wrqu, char *extra)
 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 //              ret = -EOPNOTSUPP;
 585 //              goto exit;
 586                 wrqu->power.flags = IW_POWER_PERIOD;
 587                 wrqu->power.value = ieee->ps_period * 1000;
 588 //ieee->current_network.dtim_period * ieee->current_network.beacon_interval * 1024;
 589         }
 590
 591        if ((ieee->ps & (IEEE80211_PS_MBCAST | IEEE80211_PS_UNICAST)) == (IEEE80211_PS_MBCAST | IEEE80211_PS_UNICAST))
 592                 wrqu->power.flags |= IW_POWER_ALL_R;
 593         else if (ieee->ps & IEEE80211_PS_MBCAST)
 594                 wrqu->power.flags |= IW_POWER_MULTICAST_R;
 595         else
 596                 wrqu->power.flags |= IW_POWER_UNICAST_R;
 597
 598 exit:
 599         up(&ieee->wx_sem);
 600         return 0;
 601
 602 }
 603 EXPORT_SYMBOL(ieee80211_wx_get_power);