drivers/staging/rtl8192u/ieee80211/ieee80211_softmac_wx.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* IEEE 802.11 SoftMAC layer
   3  * Copyright (c) 2005 Andrea Merello <andrea.merello@gmail.com>
   4  *
   5  * Mostly extracted from the rtl8180-sa2400 driver for the
   6  * in-kernel generic ieee802.11 stack.
   7  *
   8  * Some pieces of code might be stolen from ipw2100 driver
   9  * copyright of who own it's copyright ;-)
  10  *
  11  * PS wx handler mostly stolen from hostap, copyright who
  12  * own it's copyright ;-)
  13  */
  14
  15
  16 #include <linux/etherdevice.h>
  17
  18 #include "ieee80211.h"
  19 #include "dot11d.h"
  20 /* FIXME: add A freqs */
  21
  22 const long ieee80211_wlan_frequencies[] = {
  23         2412, 2417, 2422, 2427,
  24         2432, 2437, 2442, 2447,
  25         2452, 2457, 2462, 2467,
  26         2472, 2484
  27 };
  28 EXPORT_SYMBOL(ieee80211_wlan_frequencies);
  29
  30 int ieee80211_wx_set_freq(struct ieee80211_device *ieee, struct iw_request_info *a,
  31                              union iwreq_data *wrqu, char *b)
  32 {
  33         int ret;
  34         struct iw_freq *fwrq = &wrqu->freq;
  35
  36         mutex_lock(&ieee->wx_mutex);
  37
  38         if (ieee->iw_mode == IW_MODE_INFRA) {
  39                 ret = -EOPNOTSUPP;
  40                 goto out;
  41         }
  42
  43         /* if setting by freq convert to channel */
  44         if (fwrq->e == 1) {
  45                 if ((fwrq->m >= (int) 2.412e8 &&
  46                      fwrq->m <= (int) 2.487e8)) {
  47                         int f = fwrq->m / 100000;
  48                         int c = 0;
  49
  50                         while ((c < 14) && (f != ieee80211_wlan_frequencies[c]))
  51                                 c++;
  52
  53                         /* hack to fall through */
  54                         fwrq->e = 0;
  55                         fwrq->m = c + 1;
  56                 }
  57         }
  58
  59         if (fwrq->e > 0 || fwrq->m > 14 || fwrq->m < 1) {
  60                 ret = -EOPNOTSUPP;
  61                 goto out;
  62
  63         } else { /* Set the channel */
  64
  65                 if (!(GET_DOT11D_INFO(ieee)->channel_map)[fwrq->m]) {
  66                         ret = -EINVAL;
  67                         goto out;
  68                 }
  69                 ieee->current_network.channel = fwrq->m;
  70                 ieee->set_chan(ieee->dev, ieee->current_network.channel);
  71
  72                 if (ieee->iw_mode == IW_MODE_ADHOC || ieee->iw_mode == IW_MODE_MASTER)
  73                         if (ieee->state == IEEE80211_LINKED) {
  74                                 ieee80211_stop_send_beacons(ieee);
  75                                 ieee80211_start_send_beacons(ieee);
  76                         }
  77         }
  78
  79         ret = 0;
  80 out:
  81         mutex_unlock(&ieee->wx_mutex);
  82         return ret;
  83 }
  84 EXPORT_SYMBOL(ieee80211_wx_set_freq);
  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 EXPORT_SYMBOL(ieee80211_wx_get_freq);
 103
 104 int ieee80211_wx_get_wap(struct ieee80211_device *ieee,
 105                             struct iw_request_info *info,
 106                             union iwreq_data *wrqu, char *extra)
 107 {
 108         unsigned long flags;
 109
 110         wrqu->ap_addr.sa_family = ARPHRD_ETHER;
 111
 112         if (ieee->iw_mode == IW_MODE_MONITOR)
 113                 return -1;
 114
 115         /* We want avoid to give to the user inconsistent infos*/
 116         spin_lock_irqsave(&ieee->lock, flags);
 117
 118         if (ieee->state != IEEE80211_LINKED &&
 119                 ieee->state != IEEE80211_LINKED_SCANNING &&
 120                 ieee->wap_set == 0)
 121
 122                 eth_zero_addr(wrqu->ap_addr.sa_data);
 123         else
 124                 memcpy(wrqu->ap_addr.sa_data,
 125                        ieee->current_network.bssid, ETH_ALEN);
 126
 127         spin_unlock_irqrestore(&ieee->lock, flags);
 128
 129         return 0;
 130 }
 131 EXPORT_SYMBOL(ieee80211_wx_get_wap);
 132
 133 int ieee80211_wx_set_wap(struct ieee80211_device *ieee,
 134                          struct iw_request_info *info,
 135                          union iwreq_data *awrq,
 136                          char *extra)
 137 {
 138
 139         int ret = 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         mutex_lock(&ieee->wx_mutex);
 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 = !is_zero_ether_addr(temp->sa_data);
 169
 170         spin_unlock_irqrestore(&ieee->lock, flags);
 171
 172         if (ifup)
 173                 ieee80211_start_protocol(ieee);
 174 out:
 175         mutex_unlock(&ieee->wx_mutex);
 176         return ret;
 177 }
 178 EXPORT_SYMBOL(ieee80211_wx_set_wap);
 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 EXPORT_SYMBOL(ieee80211_wx_get_essid);
 215
 216 int ieee80211_wx_set_rate(struct ieee80211_device *ieee,
 217                              struct iw_request_info *info,
 218                              union iwreq_data *wrqu, char *extra)
 219 {
 220
 221         u32 target_rate = wrqu->bitrate.value;
 222
 223         ieee->rate = target_rate/100000;
 224         /* FIXME: we might want to limit rate also in management protocols. */
 225         return 0;
 226 }
 227 EXPORT_SYMBOL(ieee80211_wx_set_rate);
 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
 235         tmp_rate = TxCountToDataRate(ieee, ieee->softmac_stats.CurrentShowTxate);
 236
 237         wrqu->bitrate.value = tmp_rate * 500000;
 238
 239         return 0;
 240 }
 241 EXPORT_SYMBOL(ieee80211_wx_get_rate);
 242
 243 int ieee80211_wx_set_rts(struct ieee80211_device *ieee,
 244                              struct iw_request_info *info,
 245                              union iwreq_data *wrqu, char *extra)
 246 {
 247         if (wrqu->rts.disabled || !wrqu->rts.fixed) {
 248                 ieee->rts = DEFAULT_RTS_THRESHOLD;
 249         } else {
 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 EXPORT_SYMBOL(ieee80211_wx_set_rts);
 258
 259 int ieee80211_wx_get_rts(struct ieee80211_device *ieee,
 260                              struct iw_request_info *info,
 261                              union iwreq_data *wrqu, char *extra)
 262 {
 263         wrqu->rts.value = ieee->rts;
 264         wrqu->rts.fixed = 0;    /* no auto select */
 265         wrqu->rts.disabled = (wrqu->rts.value == DEFAULT_RTS_THRESHOLD);
 266         return 0;
 267 }
 268 EXPORT_SYMBOL(ieee80211_wx_get_rts);
 269
 270 int ieee80211_wx_set_mode(struct ieee80211_device *ieee, struct iw_request_info *a,
 271                              union iwreq_data *wrqu, char *b)
 272 {
 273
 274         ieee->sync_scan_hurryup = 1;
 275
 276         mutex_lock(&ieee->wx_mutex);
 277
 278         if (wrqu->mode == ieee->iw_mode)
 279                 goto out;
 280
 281         if (wrqu->mode == IW_MODE_MONITOR)
 282                 ieee->dev->type = ARPHRD_IEEE80211;
 283         else
 284                 ieee->dev->type = ARPHRD_ETHER;
 285
 286         if (!ieee->proto_started) {
 287                 ieee->iw_mode = wrqu->mode;
 288         } else {
 289                 ieee80211_stop_protocol(ieee);
 290                 ieee->iw_mode = wrqu->mode;
 291                 ieee80211_start_protocol(ieee);
 292         }
 293
 294 out:
 295         mutex_unlock(&ieee->wx_mutex);
 296         return 0;
 297 }
 298 EXPORT_SYMBOL(ieee80211_wx_set_mode);
 299
 300 void ieee80211_wx_sync_scan_wq(struct work_struct *work)
 301 {
 302         struct ieee80211_device *ieee = container_of(work, struct ieee80211_device, wx_sync_scan_wq);
 303         short chan;
 304         enum ht_extension_chan_offset chan_offset = 0;
 305         enum ht_channel_width bandwidth = 0;
 306         int b40M = 0;
 307
 308         chan = ieee->current_network.channel;
 309         netif_carrier_off(ieee->dev);
 310
 311         if (ieee->data_hard_stop)
 312                 ieee->data_hard_stop(ieee->dev);
 313
 314         ieee80211_stop_send_beacons(ieee);
 315
 316         ieee->state = IEEE80211_LINKED_SCANNING;
 317         ieee->link_change(ieee->dev);
 318         ieee->InitialGainHandler(ieee->dev, IG_Backup);
 319         if (ieee->pHTInfo->bCurrentHTSupport && ieee->pHTInfo->bEnableHT && ieee->pHTInfo->bCurBW40MHz) {
 320                 b40M = 1;
 321                 chan_offset = ieee->pHTInfo->CurSTAExtChnlOffset;
 322                 bandwidth = (enum ht_channel_width)ieee->pHTInfo->bCurBW40MHz;
 323                 printk("Scan in 40M, force to 20M first:%d, %d\n", chan_offset, bandwidth);
 324                 ieee->SetBWModeHandler(ieee->dev, HT_CHANNEL_WIDTH_20, HT_EXTCHNL_OFFSET_NO_EXT);
 325                 }
 326         ieee80211_start_scan_syncro(ieee);
 327         if (b40M) {
 328                 printk("Scan in 20M, back to 40M\n");
 329                 if (chan_offset == HT_EXTCHNL_OFFSET_UPPER)
 330                         ieee->set_chan(ieee->dev, chan + 2);
 331                 else if (chan_offset == HT_EXTCHNL_OFFSET_LOWER)
 332                         ieee->set_chan(ieee->dev, chan - 2);
 333                 else
 334                         ieee->set_chan(ieee->dev, chan);
 335                 ieee->SetBWModeHandler(ieee->dev, bandwidth, chan_offset);
 336         } else {
 337                 ieee->set_chan(ieee->dev, chan);
 338         }
 339
 340         ieee->InitialGainHandler(ieee->dev, IG_Restore);
 341         ieee->state = IEEE80211_LINKED;
 342         ieee->link_change(ieee->dev);
 343         /* To prevent the immediately calling watch_dog after scan. */
 344         if (ieee->LinkDetectInfo.NumRecvBcnInPeriod == 0 || ieee->LinkDetectInfo.NumRecvDataInPeriod == 0) {
 345                 ieee->LinkDetectInfo.NumRecvBcnInPeriod = 1;
 346                 ieee->LinkDetectInfo.NumRecvDataInPeriod = 1;
 347         }
 348         if (ieee->data_hard_resume)
 349                 ieee->data_hard_resume(ieee->dev);
 350
 351         if (ieee->iw_mode == IW_MODE_ADHOC || ieee->iw_mode == IW_MODE_MASTER)
 352                 ieee80211_start_send_beacons(ieee);
 353
 354         netif_carrier_on(ieee->dev);
 355         mutex_unlock(&ieee->wx_mutex);
 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         mutex_lock(&ieee->wx_mutex);
 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         mutex_unlock(&ieee->wx_mutex);
 379         return ret;
 380 }
 381 EXPORT_SYMBOL(ieee80211_wx_set_scan);
 382
 383 int ieee80211_wx_set_essid(struct ieee80211_device *ieee,
 384                               struct iw_request_info *a,
 385                               union iwreq_data *wrqu, char *extra)
 386 {
 387
 388         int ret = 0, len;
 389         short proto_started;
 390         unsigned long flags;
 391
 392         ieee->sync_scan_hurryup = 1;
 393         mutex_lock(&ieee->wx_mutex);
 394
 395         proto_started = ieee->proto_started;
 396
 397         if (wrqu->essid.length > IW_ESSID_MAX_SIZE) {
 398                 ret = -E2BIG;
 399                 goto out;
 400         }
 401
 402         if (ieee->iw_mode == IW_MODE_MONITOR) {
 403                 ret = -1;
 404                 goto out;
 405         }
 406
 407         if (proto_started)
 408                 ieee80211_stop_protocol(ieee);
 409
 410
 411         /* this is just to be sure that the GET wx callback
 412          * has consisten infos. not needed otherwise
 413          */
 414         spin_lock_irqsave(&ieee->lock, flags);
 415
 416         if (wrqu->essid.flags && wrqu->essid.length) {
 417                 /* first flush current network.ssid */
 418                 len = ((wrqu->essid.length-1) < IW_ESSID_MAX_SIZE) ? (wrqu->essid.length-1) : IW_ESSID_MAX_SIZE;
 419                 strncpy(ieee->current_network.ssid, extra, len+1);
 420                 ieee->current_network.ssid_len = len+1;
 421                 ieee->ssid_set = 1;
 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         mutex_unlock(&ieee->wx_mutex);
 433         return ret;
 434 }
 435 EXPORT_SYMBOL(ieee80211_wx_set_essid);
 436
 437 int ieee80211_wx_get_mode(struct ieee80211_device *ieee, struct iw_request_info *a,
 438                              union iwreq_data *wrqu, char *b)
 439 {
 440
 441         wrqu->mode = ieee->iw_mode;
 442         return 0;
 443 }
 444 EXPORT_SYMBOL(ieee80211_wx_get_mode);
 445
 446 int ieee80211_wx_set_rawtx(struct ieee80211_device *ieee,
 447                                struct iw_request_info *info,
 448                                union iwreq_data *wrqu, char *extra)
 449 {
 450
 451         int *parms = (int *)extra;
 452         int enable = (parms[0] > 0);
 453         short prev = ieee->raw_tx;
 454
 455         mutex_lock(&ieee->wx_mutex);
 456
 457         if (enable)
 458                 ieee->raw_tx = 1;
 459         else
 460                 ieee->raw_tx = 0;
 461
 462         printk(KERN_INFO"raw TX is %s\n",
 463               ieee->raw_tx ? "enabled" : "disabled");
 464
 465         if (ieee->iw_mode == IW_MODE_MONITOR) {
 466                 if (prev == 0 && ieee->raw_tx) {
 467                         if (ieee->data_hard_resume)
 468                                 ieee->data_hard_resume(ieee->dev);
 469
 470                         netif_carrier_on(ieee->dev);
 471                 }
 472
 473                 if (prev && ieee->raw_tx == 1)
 474                         netif_carrier_off(ieee->dev);
 475         }
 476
 477         mutex_unlock(&ieee->wx_mutex);
 478
 479         return 0;
 480 }
 481 EXPORT_SYMBOL(ieee80211_wx_set_rawtx);
 482
 483 int ieee80211_wx_get_name(struct ieee80211_device *ieee,
 484                              struct iw_request_info *info,
 485                              union iwreq_data *wrqu, char *extra)
 486 {
 487         strlcpy(wrqu->name, "802.11", IFNAMSIZ);
 488         if (ieee->modulation & IEEE80211_CCK_MODULATION) {
 489                 strlcat(wrqu->name, "b", IFNAMSIZ);
 490                 if (ieee->modulation & IEEE80211_OFDM_MODULATION)
 491                         strlcat(wrqu->name, "/g", IFNAMSIZ);
 492         } else if (ieee->modulation & IEEE80211_OFDM_MODULATION) {
 493                 strlcat(wrqu->name, "g", IFNAMSIZ);
 494         }
 495
 496         if (ieee->mode & (IEEE_N_24G | IEEE_N_5G))
 497                 strlcat(wrqu->name, "/n", IFNAMSIZ);
 498
 499         if ((ieee->state == IEEE80211_LINKED) ||
 500             (ieee->state == IEEE80211_LINKED_SCANNING))
 501                 strlcat(wrqu->name, " linked", IFNAMSIZ);
 502         else if (ieee->state != IEEE80211_NOLINK)
 503                 strlcat(wrqu->name, " link..", IFNAMSIZ);
 504
 505         return 0;
 506 }
 507 EXPORT_SYMBOL(ieee80211_wx_get_name);
 508
 509 /* this is mostly stolen from hostap */
 510 int ieee80211_wx_set_power(struct ieee80211_device *ieee,
 511                                  struct iw_request_info *info,
 512                                  union iwreq_data *wrqu, char *extra)
 513 {
 514         int ret = 0;
 515
 516         mutex_lock(&ieee->wx_mutex);
 517
 518         if (wrqu->power.disabled) {
 519                 ieee->ps = IEEE80211_PS_DISABLED;
 520                 goto exit;
 521         }
 522         if (wrqu->power.flags & IW_POWER_TIMEOUT) {
 523                 /* ieee->ps_period = wrqu->power.value / 1000; */
 524                 ieee->ps_timeout = wrqu->power.value / 1000;
 525         }
 526
 527         if (wrqu->power.flags & IW_POWER_PERIOD) {
 528
 529                 /* ieee->ps_timeout = wrqu->power.value / 1000; */
 530                 ieee->ps_period = wrqu->power.value / 1000;
 531                 /* wrq->value / 1024; */
 532
 533         }
 534         switch (wrqu->power.flags & IW_POWER_MODE) {
 535         case IW_POWER_UNICAST_R:
 536                 ieee->ps = IEEE80211_PS_UNICAST;
 537                 break;
 538         case IW_POWER_MULTICAST_R:
 539                 ieee->ps = IEEE80211_PS_MBCAST;
 540                 break;
 541         case IW_POWER_ALL_R:
 542                 ieee->ps = IEEE80211_PS_UNICAST | IEEE80211_PS_MBCAST;
 543                 break;
 544
 545         case IW_POWER_ON:
 546                 /* ieee->ps = IEEE80211_PS_DISABLED; */
 547                 break;
 548
 549         default:
 550                 ret = -EINVAL;
 551                 goto exit;
 552
 553         }
 554 exit:
 555         mutex_unlock(&ieee->wx_mutex);
 556         return ret;
 557
 558 }
 559 EXPORT_SYMBOL(ieee80211_wx_set_power);
 560
 561 /* this is stolen from hostap */
 562 int ieee80211_wx_get_power(struct ieee80211_device *ieee,
 563                                  struct iw_request_info *info,
 564                                  union iwreq_data *wrqu, char *extra)
 565 {
 566         mutex_lock(&ieee->wx_mutex);
 567
 568         if (ieee->ps == IEEE80211_PS_DISABLED) {
 569                 wrqu->power.disabled = 1;
 570                 goto exit;
 571         }
 572
 573         wrqu->power.disabled = 0;
 574
 575         if ((wrqu->power.flags & IW_POWER_TYPE) == IW_POWER_TIMEOUT) {
 576                 wrqu->power.flags = IW_POWER_TIMEOUT;
 577                 wrqu->power.value = ieee->ps_timeout * 1000;
 578         } else {
 579                 /* ret = -EOPNOTSUPP; */
 580                 /* goto exit; */
 581                 wrqu->power.flags = IW_POWER_PERIOD;
 582                 wrqu->power.value = ieee->ps_period * 1000;
 583                 /* ieee->current_network.dtim_period * ieee->current_network.beacon_interval * 1024; */
 584         }
 585
 586         if ((ieee->ps & (IEEE80211_PS_MBCAST | IEEE80211_PS_UNICAST)) == (IEEE80211_PS_MBCAST | IEEE80211_PS_UNICAST))
 587                 wrqu->power.flags |= IW_POWER_ALL_R;
 588         else if (ieee->ps & IEEE80211_PS_MBCAST)
 589                 wrqu->power.flags |= IW_POWER_MULTICAST_R;
 590         else
 591                 wrqu->power.flags |= IW_POWER_UNICAST_R;
 592
 593 exit:
 594         mutex_unlock(&ieee->wx_mutex);
 595         return 0;
 596
 597 }
 598 EXPORT_SYMBOL(ieee80211_wx_get_power);