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                                 ieee80211_stop_send_beacons(ieee);
  76                                 ieee80211_start_send_beacons(ieee);
  77                         }
  78         }
  79
  80         ret = 0;
  81 out:
  82         up(&ieee->wx_sem);
  83         return ret;
  84 }
  85 EXPORT_SYMBOL(ieee80211_wx_set_freq);
  86
  87 int ieee80211_wx_get_freq(struct ieee80211_device *ieee,
  88                              struct iw_request_info *a,
  89                              union iwreq_data *wrqu, char *b)
  90 {
  91         struct iw_freq *fwrq = &wrqu->freq;
  92
  93         if (ieee->current_network.channel == 0)
  94                 return -1;
  95         /* NM 0.7.0 will not accept channel any more. */
  96         fwrq->m = ieee80211_wlan_frequencies[ieee->current_network.channel-1] * 100000;
  97         fwrq->e = 1;
  98         /* fwrq->m = ieee->current_network.channel; */
  99         /* fwrq->e = 0; */
 100
 101         return 0;
 102 }
 103 EXPORT_SYMBOL(ieee80211_wx_get_freq);
 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                 eth_zero_addr(wrqu->ap_addr.sa_data);
 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 EXPORT_SYMBOL(ieee80211_wx_get_wap);
 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 EXPORT_SYMBOL(ieee80211_wx_set_wap);
 180
 181 int ieee80211_wx_get_essid(struct ieee80211_device *ieee, struct iw_request_info *a, union iwreq_data *wrqu, char *b)
 182 {
 183         int len, ret = 0;
 184         unsigned long flags;
 185
 186         if (ieee->iw_mode == IW_MODE_MONITOR)
 187                 return -1;
 188
 189         /* We want avoid to give to the user inconsistent infos*/
 190         spin_lock_irqsave(&ieee->lock, flags);
 191
 192         if (ieee->current_network.ssid[0] == '\0' ||
 193                 ieee->current_network.ssid_len == 0) {
 194                 ret = -1;
 195                 goto out;
 196         }
 197
 198         if (ieee->state != IEEE80211_LINKED &&
 199                 ieee->state != IEEE80211_LINKED_SCANNING &&
 200                 ieee->ssid_set == 0) {
 201                 ret = -1;
 202                 goto out;
 203         }
 204         len = ieee->current_network.ssid_len;
 205         wrqu->essid.length = len;
 206         strncpy(b, ieee->current_network.ssid, len);
 207         wrqu->essid.flags = 1;
 208
 209 out:
 210         spin_unlock_irqrestore(&ieee->lock, flags);
 211
 212         return ret;
 213
 214 }
 215 EXPORT_SYMBOL(ieee80211_wx_get_essid);
 216
 217 int ieee80211_wx_set_rate(struct ieee80211_device *ieee,
 218                              struct iw_request_info *info,
 219                              union iwreq_data *wrqu, char *extra)
 220 {
 221
 222         u32 target_rate = wrqu->bitrate.value;
 223
 224         ieee->rate = target_rate/100000;
 225         /* FIXME: we might want to limit rate also in management protocols. */
 226         return 0;
 227 }
 228 EXPORT_SYMBOL(ieee80211_wx_set_rate);
 229
 230 int ieee80211_wx_get_rate(struct ieee80211_device *ieee,
 231                              struct iw_request_info *info,
 232                              union iwreq_data *wrqu, char *extra)
 233 {
 234         u32 tmp_rate;
 235
 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                 if (wrqu->rts.value < MIN_RTS_THRESHOLD ||
 252                                 wrqu->rts.value > MAX_RTS_THRESHOLD)
 253                         return -EINVAL;
 254                 ieee->rts = wrqu->rts.value;
 255         }
 256         return 0;
 257 }
 258 EXPORT_SYMBOL(ieee80211_wx_set_rts);
 259
 260 int ieee80211_wx_get_rts(struct ieee80211_device *ieee,
 261                              struct iw_request_info *info,
 262                              union iwreq_data *wrqu, char *extra)
 263 {
 264         wrqu->rts.value = ieee->rts;
 265         wrqu->rts.fixed = 0;    /* no auto select */
 266         wrqu->rts.disabled = (wrqu->rts.value == DEFAULT_RTS_THRESHOLD);
 267         return 0;
 268 }
 269 EXPORT_SYMBOL(ieee80211_wx_get_rts);
 270
 271 int ieee80211_wx_set_mode(struct ieee80211_device *ieee, struct iw_request_info *a,
 272                              union iwreq_data *wrqu, char *b)
 273 {
 274
 275         ieee->sync_scan_hurryup = 1;
 276
 277         down(&ieee->wx_sem);
 278
 279         if (wrqu->mode == ieee->iw_mode)
 280                 goto out;
 281
 282         if (wrqu->mode == IW_MODE_MONITOR) {
 283
 284                 ieee->dev->type = ARPHRD_IEEE80211;
 285         } else {
 286                 ieee->dev->type = ARPHRD_ETHER;
 287         }
 288
 289         if (!ieee->proto_started) {
 290                 ieee->iw_mode = wrqu->mode;
 291         } else {
 292                 ieee80211_stop_protocol(ieee);
 293                 ieee->iw_mode = wrqu->mode;
 294                 ieee80211_start_protocol(ieee);
 295         }
 296
 297 out:
 298         up(&ieee->wx_sem);
 299         return 0;
 300 }
 301 EXPORT_SYMBOL(ieee80211_wx_set_mode);
 302
 303 void ieee80211_wx_sync_scan_wq(struct work_struct *work)
 304 {
 305         struct ieee80211_device *ieee = container_of(work, struct ieee80211_device, wx_sync_scan_wq);
 306         short chan;
 307         HT_EXTCHNL_OFFSET chan_offset = 0;
 308         HT_CHANNEL_WIDTH bandwidth = 0;
 309         int b40M = 0;
 310
 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                 ieee->LinkDetectInfo.NumRecvBcnInPeriod = 1;
 349                 ieee->LinkDetectInfo.NumRecvDataInPeriod = 1;
 350         }
 351         if (ieee->data_hard_resume)
 352                 ieee->data_hard_resume(ieee->dev);
 353
 354         if (ieee->iw_mode == IW_MODE_ADHOC || ieee->iw_mode == IW_MODE_MASTER)
 355                 ieee80211_start_send_beacons(ieee);
 356
 357         netif_carrier_on(ieee->dev);
 358         up(&ieee->wx_sem);
 359
 360 }
 361
 362 int ieee80211_wx_set_scan(struct ieee80211_device *ieee, struct iw_request_info *a,
 363                              union iwreq_data *wrqu, char *b)
 364 {
 365         int ret = 0;
 366
 367         down(&ieee->wx_sem);
 368
 369         if (ieee->iw_mode == IW_MODE_MONITOR || !(ieee->proto_started)) {
 370                 ret = -1;
 371                 goto out;
 372         }
 373
 374         if (ieee->state == IEEE80211_LINKED) {
 375                 queue_work(ieee->wq, &ieee->wx_sync_scan_wq);
 376                 /* intentionally forget to up sem */
 377                 return 0;
 378         }
 379
 380 out:
 381         up(&ieee->wx_sem);
 382         return ret;
 383 }
 384 EXPORT_SYMBOL(ieee80211_wx_set_scan);
 385
 386 int ieee80211_wx_set_essid(struct ieee80211_device *ieee,
 387                               struct iw_request_info *a,
 388                               union iwreq_data *wrqu, char *extra)
 389 {
 390
 391         int ret = 0, len;
 392         short proto_started;
 393         unsigned long flags;
 394
 395         ieee->sync_scan_hurryup = 1;
 396         down(&ieee->wx_sem);
 397
 398         proto_started = ieee->proto_started;
 399
 400         if (wrqu->essid.length > IW_ESSID_MAX_SIZE) {
 401                 ret = -E2BIG;
 402                 goto out;
 403         }
 404
 405         if (ieee->iw_mode == IW_MODE_MONITOR) {
 406                 ret = -1;
 407                 goto out;
 408         }
 409
 410         if (proto_started)
 411                 ieee80211_stop_protocol(ieee);
 412
 413
 414         /* this is just to be sure that the GET wx callback
 415          * has consisten infos. not needed otherwise
 416          */
 417         spin_lock_irqsave(&ieee->lock, flags);
 418
 419         if (wrqu->essid.flags && wrqu->essid.length) {
 420                 /* first flush current network.ssid */
 421                 len = ((wrqu->essid.length-1) < IW_ESSID_MAX_SIZE) ? (wrqu->essid.length-1) : IW_ESSID_MAX_SIZE;
 422                 strncpy(ieee->current_network.ssid, extra, len+1);
 423                 ieee->current_network.ssid_len = len+1;
 424                 ieee->ssid_set = 1;
 425         }
 426         else {
 427                 ieee->ssid_set = 0;
 428                 ieee->current_network.ssid[0] = '\0';
 429                 ieee->current_network.ssid_len = 0;
 430         }
 431         spin_unlock_irqrestore(&ieee->lock, flags);
 432
 433         if (proto_started)
 434                 ieee80211_start_protocol(ieee);
 435 out:
 436         up(&ieee->wx_sem);
 437         return ret;
 438 }
 439 EXPORT_SYMBOL(ieee80211_wx_set_essid);
 440
 441 int ieee80211_wx_get_mode(struct ieee80211_device *ieee, struct iw_request_info *a,
 442                              union iwreq_data *wrqu, char *b)
 443 {
 444
 445         wrqu->mode = ieee->iw_mode;
 446         return 0;
 447 }
 448 EXPORT_SYMBOL(ieee80211_wx_get_mode);
 449
 450 int ieee80211_wx_set_rawtx(struct ieee80211_device *ieee,
 451                                struct iw_request_info *info,
 452                                union iwreq_data *wrqu, char *extra)
 453 {
 454
 455         int *parms = (int *)extra;
 456         int enable = (parms[0] > 0);
 457         short prev = ieee->raw_tx;
 458
 459         down(&ieee->wx_sem);
 460
 461         if (enable)
 462                 ieee->raw_tx = 1;
 463         else
 464                 ieee->raw_tx = 0;
 465
 466         printk(KERN_INFO"raw TX is %s\n",
 467               ieee->raw_tx ? "enabled" : "disabled");
 468
 469         if (ieee->iw_mode == IW_MODE_MONITOR) {
 470                 if (prev == 0 && ieee->raw_tx) {
 471                         if (ieee->data_hard_resume)
 472                                 ieee->data_hard_resume(ieee->dev);
 473
 474                         netif_carrier_on(ieee->dev);
 475                 }
 476
 477                 if (prev && ieee->raw_tx == 1)
 478                         netif_carrier_off(ieee->dev);
 479         }
 480
 481         up(&ieee->wx_sem);
 482
 483         return 0;
 484 }
 485 EXPORT_SYMBOL(ieee80211_wx_set_rawtx);
 486
 487 int ieee80211_wx_get_name(struct ieee80211_device *ieee,
 488                              struct iw_request_info *info,
 489                              union iwreq_data *wrqu, char *extra)
 490 {
 491         strlcpy(wrqu->name, "802.11", IFNAMSIZ);
 492         if (ieee->modulation & IEEE80211_CCK_MODULATION) {
 493                 strlcat(wrqu->name, "b", IFNAMSIZ);
 494                 if (ieee->modulation & IEEE80211_OFDM_MODULATION)
 495                         strlcat(wrqu->name, "/g", IFNAMSIZ);
 496         } else if (ieee->modulation & IEEE80211_OFDM_MODULATION) {
 497                 strlcat(wrqu->name, "g", IFNAMSIZ);
 498         }
 499
 500         if (ieee->mode & (IEEE_N_24G | IEEE_N_5G))
 501                 strlcat(wrqu->name, "/n", IFNAMSIZ);
 502
 503         if ((ieee->state == IEEE80211_LINKED) ||
 504             (ieee->state == IEEE80211_LINKED_SCANNING))
 505                 strlcat(wrqu->name, " linked", IFNAMSIZ);
 506         else if (ieee->state != IEEE80211_NOLINK)
 507                 strlcat(wrqu->name, " link..", IFNAMSIZ);
 508
 509         return 0;
 510 }
 511 EXPORT_SYMBOL(ieee80211_wx_get_name);
 512
 513 /* this is mostly stolen from hostap */
 514 int ieee80211_wx_set_power(struct ieee80211_device *ieee,
 515                                  struct iw_request_info *info,
 516                                  union iwreq_data *wrqu, char *extra)
 517 {
 518         int ret = 0;
 519
 520         down(&ieee->wx_sem);
 521
 522         if (wrqu->power.disabled) {
 523                 ieee->ps = IEEE80211_PS_DISABLED;
 524                 goto exit;
 525         }
 526         if (wrqu->power.flags & IW_POWER_TIMEOUT) {
 527                 /* ieee->ps_period = wrqu->power.value / 1000; */
 528                 ieee->ps_timeout = wrqu->power.value / 1000;
 529         }
 530
 531         if (wrqu->power.flags & IW_POWER_PERIOD) {
 532
 533                 /* ieee->ps_timeout = wrqu->power.value / 1000; */
 534                 ieee->ps_period = wrqu->power.value / 1000;
 535                 /* wrq->value / 1024; */
 536
 537         }
 538         switch (wrqu->power.flags & IW_POWER_MODE) {
 539         case IW_POWER_UNICAST_R:
 540                 ieee->ps = IEEE80211_PS_UNICAST;
 541                 break;
 542         case IW_POWER_MULTICAST_R:
 543                 ieee->ps = IEEE80211_PS_MBCAST;
 544                 break;
 545         case IW_POWER_ALL_R:
 546                 ieee->ps = IEEE80211_PS_UNICAST | IEEE80211_PS_MBCAST;
 547                 break;
 548
 549         case IW_POWER_ON:
 550                 /* ieee->ps = IEEE80211_PS_DISABLED; */
 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 EXPORT_SYMBOL(ieee80211_wx_set_power);
 564
 565 /* this is stolen from hostap */
 566 int ieee80211_wx_get_power(struct ieee80211_device *ieee,
 567                                  struct iw_request_info *info,
 568                                  union iwreq_data *wrqu, char *extra)
 569 {
 570         down(&ieee->wx_sem);
 571
 572         if (ieee->ps == IEEE80211_PS_DISABLED) {
 573                 wrqu->power.disabled = 1;
 574                 goto exit;
 575         }
 576
 577         wrqu->power.disabled = 0;
 578
 579         if ((wrqu->power.flags & IW_POWER_TYPE) == IW_POWER_TIMEOUT) {
 580                 wrqu->power.flags = IW_POWER_TIMEOUT;
 581                 wrqu->power.value = ieee->ps_timeout * 1000;
 582         } else {
 583                 /* ret = -EOPNOTSUPP; */
 584                 /* goto exit; */
 585                 wrqu->power.flags = IW_POWER_PERIOD;
 586                 wrqu->power.value = ieee->ps_period * 1000;
 587                 /* ieee->current_network.dtim_period * ieee->current_network.beacon_interval * 1024; */
 588         }
 589
 590         if ((ieee->ps & (IEEE80211_PS_MBCAST | IEEE80211_PS_UNICAST)) == (IEEE80211_PS_MBCAST | IEEE80211_PS_UNICAST))
 591                 wrqu->power.flags |= IW_POWER_ALL_R;
 592         else if (ieee->ps & IEEE80211_PS_MBCAST)
 593                 wrqu->power.flags |= IW_POWER_MULTICAST_R;
 594         else
 595                 wrqu->power.flags |= IW_POWER_UNICAST_R;
 596
 597 exit:
 598         up(&ieee->wx_sem);
 599         return 0;
 600
 601 }
 602 EXPORT_SYMBOL(ieee80211_wx_get_power);