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