SAFE public projects git trees. - safe/jmp/linux-2.6/blob - net/mac80211/ieee80211.c

   1 /*
   2  * Copyright 2002-2005, Instant802 Networks, Inc.
   3  * Copyright 2005-2006, Devicescape Software, Inc.
   4  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #include <net/mac80211.h>
  12 #include <net/ieee80211_radiotap.h>
  13 #include <linux/module.h>
  14 #include <linux/init.h>
  15 #include <linux/netdevice.h>
  16 #include <linux/types.h>
  17 #include <linux/slab.h>
  18 #include <linux/skbuff.h>
  19 #include <linux/etherdevice.h>
  20 #include <linux/if_arp.h>
  21 #include <linux/wireless.h>
  22 #include <linux/rtnetlink.h>
  23 #include <linux/bitmap.h>
  24 #include <net/cfg80211.h>
  25
  26 #include "ieee80211_common.h"
  27 #include "ieee80211_i.h"
  28 #include "ieee80211_rate.h"
  29 #include "wep.h"
  30 #include "wme.h"
  31 #include "aes_ccm.h"
  32 #include "ieee80211_led.h"
  33 #include "ieee80211_cfg.h"
  34 #include "debugfs.h"
  35 #include "debugfs_netdev.h"
  36 #include "debugfs_key.h"
  37
  38 /* privid for wiphys to determine whether they belong to us or not */
  39 void *mac80211_wiphy_privid = &mac80211_wiphy_privid;
  40
  41 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
  42 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */
  43 const unsigned char rfc1042_header[] =
  44         { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
  45
  46 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
  47 const unsigned char bridge_tunnel_header[] =
  48         { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
  49
  50 /* No encapsulation header if EtherType < 0x600 (=length) */
  51 static const unsigned char eapol_header[] =
  52         { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00, 0x88, 0x8e };
  53
  54
  55 /*
  56  * For seeing transmitted packets on monitor interfaces
  57  * we have a radiotap header too.
  58  */
  59 struct ieee80211_tx_status_rtap_hdr {
  60         struct ieee80211_radiotap_header hdr;
  61         __le16 tx_flags;
  62         u8 data_retries;
  63 } __attribute__ ((packed));
  64
  65
  66 struct ieee80211_key_conf *
  67 ieee80211_key_data2conf(struct ieee80211_local *local,
  68                         const struct ieee80211_key *data)
  69 {
  70         struct ieee80211_key_conf *conf;
  71
  72         conf = kmalloc(sizeof(*conf) + data->keylen, GFP_ATOMIC);
  73         if (!conf)
  74                 return NULL;
  75
  76         conf->hw_key_idx = data->hw_key_idx;
  77         conf->alg = data->alg;
  78         conf->keylen = data->keylen;
  79         conf->flags = 0;
  80         if (data->force_sw_encrypt)
  81                 conf->flags |= IEEE80211_KEY_FORCE_SW_ENCRYPT;
  82         conf->keyidx = data->keyidx;
  83         if (data->default_tx_key)
  84                 conf->flags |= IEEE80211_KEY_DEFAULT_TX_KEY;
  85         if (local->default_wep_only)
  86                 conf->flags |= IEEE80211_KEY_DEFAULT_WEP_ONLY;
  87         memcpy(conf->key, data->key, data->keylen);
  88
  89         return conf;
  90 }
  91
  92 struct ieee80211_key *ieee80211_key_alloc(struct ieee80211_sub_if_data *sdata,
  93                                           int idx, size_t key_len, gfp_t flags)
  94 {
  95         struct ieee80211_key *key;
  96
  97         key = kzalloc(sizeof(struct ieee80211_key) + key_len, flags);
  98         if (!key)
  99                 return NULL;
 100         kref_init(&key->kref);
 101         return key;
 102 }
 103
 104 static void ieee80211_key_release(struct kref *kref)
 105 {
 106         struct ieee80211_key *key;
 107
 108         key = container_of(kref, struct ieee80211_key, kref);
 109         if (key->alg == ALG_CCMP)
 110                 ieee80211_aes_key_free(key->u.ccmp.tfm);
 111         ieee80211_debugfs_key_remove(key);
 112         kfree(key);
 113 }
 114
 115 void ieee80211_key_free(struct ieee80211_key *key)
 116 {
 117         if (key)
 118                 kref_put(&key->kref, ieee80211_key_release);
 119 }
 120
 121 static int rate_list_match(const int *rate_list, int rate)
 122 {
 123         int i;
 124
 125         if (!rate_list)
 126                 return 0;
 127
 128         for (i = 0; rate_list[i] >= 0; i++)
 129                 if (rate_list[i] == rate)
 130                         return 1;
 131
 132         return 0;
 133 }
 134
 135
 136 void ieee80211_prepare_rates(struct ieee80211_local *local,
 137                              struct ieee80211_hw_mode *mode)
 138 {
 139         int i;
 140
 141         for (i = 0; i < mode->num_rates; i++) {
 142                 struct ieee80211_rate *rate = &mode->rates[i];
 143
 144                 rate->flags &= ~(IEEE80211_RATE_SUPPORTED |
 145                                  IEEE80211_RATE_BASIC);
 146
 147                 if (local->supp_rates[mode->mode]) {
 148                         if (!rate_list_match(local->supp_rates[mode->mode],
 149                                              rate->rate))
 150                                 continue;
 151                 }
 152
 153                 rate->flags |= IEEE80211_RATE_SUPPORTED;
 154
 155                 /* Use configured basic rate set if it is available. If not,
 156                  * use defaults that are sane for most cases. */
 157                 if (local->basic_rates[mode->mode]) {
 158                         if (rate_list_match(local->basic_rates[mode->mode],
 159                                             rate->rate))
 160                                 rate->flags |= IEEE80211_RATE_BASIC;
 161                 } else switch (mode->mode) {
 162                 case MODE_IEEE80211A:
 163                         if (rate->rate == 60 || rate->rate == 120 ||
 164                             rate->rate == 240)
 165                                 rate->flags |= IEEE80211_RATE_BASIC;
 166                         break;
 167                 case MODE_IEEE80211B:
 168                         if (rate->rate == 10 || rate->rate == 20)
 169                                 rate->flags |= IEEE80211_RATE_BASIC;
 170                         break;
 171                 case MODE_ATHEROS_TURBO:
 172                         if (rate->rate == 120 || rate->rate == 240 ||
 173                             rate->rate == 480)
 174                                 rate->flags |= IEEE80211_RATE_BASIC;
 175                         break;
 176                 case MODE_IEEE80211G:
 177                         if (rate->rate == 10 || rate->rate == 20 ||
 178                             rate->rate == 55 || rate->rate == 110)
 179                                 rate->flags |= IEEE80211_RATE_BASIC;
 180                         break;
 181                 }
 182
 183                 /* Set ERP and MANDATORY flags based on phymode */
 184                 switch (mode->mode) {
 185                 case MODE_IEEE80211A:
 186                         if (rate->rate == 60 || rate->rate == 120 ||
 187                             rate->rate == 240)
 188                                 rate->flags |= IEEE80211_RATE_MANDATORY;
 189                         break;
 190                 case MODE_IEEE80211B:
 191                         if (rate->rate == 10)
 192                                 rate->flags |= IEEE80211_RATE_MANDATORY;
 193                         break;
 194                 case MODE_ATHEROS_TURBO:
 195                         break;
 196                 case MODE_IEEE80211G:
 197                         if (rate->rate == 10 || rate->rate == 20 ||
 198                             rate->rate == 55 || rate->rate == 110 ||
 199                             rate->rate == 60 || rate->rate == 120 ||
 200                             rate->rate == 240)
 201                                 rate->flags |= IEEE80211_RATE_MANDATORY;
 202                         break;
 203                 }
 204                 if (ieee80211_is_erp_rate(mode->mode, rate->rate))
 205                         rate->flags |= IEEE80211_RATE_ERP;
 206         }
 207 }
 208
 209
 210 void ieee80211_key_threshold_notify(struct net_device *dev,
 211                                     struct ieee80211_key *key,
 212                                     struct sta_info *sta)
 213 {
 214         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 215         struct sk_buff *skb;
 216         struct ieee80211_msg_key_notification *msg;
 217
 218         /* if no one will get it anyway, don't even allocate it.
 219          * unlikely because this is only relevant for APs
 220          * where the device must be open... */
 221         if (unlikely(!local->apdev))
 222                 return;
 223
 224         skb = dev_alloc_skb(sizeof(struct ieee80211_frame_info) +
 225                             sizeof(struct ieee80211_msg_key_notification));
 226         if (!skb)
 227                 return;
 228
 229         skb_reserve(skb, sizeof(struct ieee80211_frame_info));
 230         msg = (struct ieee80211_msg_key_notification *)
 231                 skb_put(skb, sizeof(struct ieee80211_msg_key_notification));
 232         msg->tx_rx_count = key->tx_rx_count;
 233         memcpy(msg->ifname, dev->name, IFNAMSIZ);
 234         if (sta)
 235                 memcpy(msg->addr, sta->addr, ETH_ALEN);
 236         else
 237                 memset(msg->addr, 0xff, ETH_ALEN);
 238
 239         key->tx_rx_count = 0;
 240
 241         ieee80211_rx_mgmt(local, skb, NULL,
 242                           ieee80211_msg_key_threshold_notification);
 243 }
 244
 245
 246 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len)
 247 {
 248         u16 fc;
 249
 250         if (len < 24)
 251                 return NULL;
 252
 253         fc = le16_to_cpu(hdr->frame_control);
 254
 255         switch (fc & IEEE80211_FCTL_FTYPE) {
 256         case IEEE80211_FTYPE_DATA:
 257                 switch (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) {
 258                 case IEEE80211_FCTL_TODS:
 259                         return hdr->addr1;
 260                 case (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS):
 261                         return NULL;
 262                 case IEEE80211_FCTL_FROMDS:
 263                         return hdr->addr2;
 264                 case 0:
 265                         return hdr->addr3;
 266                 }
 267                 break;
 268         case IEEE80211_FTYPE_MGMT:
 269                 return hdr->addr3;
 270         case IEEE80211_FTYPE_CTL:
 271                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PSPOLL)
 272                         return hdr->addr1;
 273                 else
 274                         return NULL;
 275         }
 276
 277         return NULL;
 278 }
 279
 280 int ieee80211_get_hdrlen(u16 fc)
 281 {
 282         int hdrlen = 24;
 283
 284         switch (fc & IEEE80211_FCTL_FTYPE) {
 285         case IEEE80211_FTYPE_DATA:
 286                 if ((fc & IEEE80211_FCTL_FROMDS) && (fc & IEEE80211_FCTL_TODS))
 287                         hdrlen = 30; /* Addr4 */
 288                 /*
 289                  * The QoS Control field is two bytes and its presence is
 290                  * indicated by the IEEE80211_STYPE_QOS_DATA bit. Add 2 to
 291                  * hdrlen if that bit is set.
 292                  * This works by masking out the bit and shifting it to
 293                  * bit position 1 so the result has the value 0 or 2.
 294                  */
 295                 hdrlen += (fc & IEEE80211_STYPE_QOS_DATA)
 296                                 >> (ilog2(IEEE80211_STYPE_QOS_DATA)-1);
 297                 break;
 298         case IEEE80211_FTYPE_CTL:
 299                 /*
 300                  * ACK and CTS are 10 bytes, all others 16. To see how
 301                  * to get this condition consider
 302                  *   subtype mask:   0b0000000011110000 (0x00F0)
 303                  *   ACK subtype:    0b0000000011010000 (0x00D0)
 304                  *   CTS subtype:    0b0000000011000000 (0x00C0)
 305                  *   bits that matter:         ^^^      (0x00E0)
 306                  *   value of those: 0b0000000011000000 (0x00C0)
 307                  */
 308                 if ((fc & 0xE0) == 0xC0)
 309                         hdrlen = 10;
 310                 else
 311                         hdrlen = 16;
 312                 break;
 313         }
 314
 315         return hdrlen;
 316 }
 317 EXPORT_SYMBOL(ieee80211_get_hdrlen);
 318
 319 int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb)
 320 {
 321         const struct ieee80211_hdr *hdr = (const struct ieee80211_hdr *) skb->data;
 322         int hdrlen;
 323
 324         if (unlikely(skb->len < 10))
 325                 return 0;
 326         hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_control));
 327         if (unlikely(hdrlen > skb->len))
 328                 return 0;
 329         return hdrlen;
 330 }
 331 EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb);
 332
 333
 334 int ieee80211_is_eapol(const struct sk_buff *skb)
 335 {
 336         const struct ieee80211_hdr *hdr;
 337         u16 fc;
 338         int hdrlen;
 339
 340         if (unlikely(skb->len < 10))
 341                 return 0;
 342
 343         hdr = (const struct ieee80211_hdr *) skb->data;
 344         fc = le16_to_cpu(hdr->frame_control);
 345
 346         if (unlikely(!WLAN_FC_DATA_PRESENT(fc)))
 347                 return 0;
 348
 349         hdrlen = ieee80211_get_hdrlen(fc);
 350
 351         if (unlikely(skb->len >= hdrlen + sizeof(eapol_header) &&
 352                      memcmp(skb->data + hdrlen, eapol_header,
 353                             sizeof(eapol_header)) == 0))
 354                 return 1;
 355
 356         return 0;
 357 }
 358
 359
 360 void ieee80211_tx_set_iswep(struct ieee80211_txrx_data *tx)
 361 {
 362         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data;
 363
 364         hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
 365         if (tx->u.tx.extra_frag) {
 366                 struct ieee80211_hdr *fhdr;
 367                 int i;
 368                 for (i = 0; i < tx->u.tx.num_extra_frag; i++) {
 369                         fhdr = (struct ieee80211_hdr *)
 370                                 tx->u.tx.extra_frag[i]->data;
 371                         fhdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
 372                 }
 373         }
 374 }
 375
 376
 377 static int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
 378                                     int rate, int erp, int short_preamble)
 379 {
 380         int dur;
 381
 382         /* calculate duration (in microseconds, rounded up to next higher
 383          * integer if it includes a fractional microsecond) to send frame of
 384          * len bytes (does not include FCS) at the given rate. Duration will
 385          * also include SIFS.
 386          *
 387          * rate is in 100 kbps, so divident is multiplied by 10 in the
 388          * DIV_ROUND_UP() operations.
 389          */
 390
 391         if (local->hw.conf.phymode == MODE_IEEE80211A || erp ||
 392             local->hw.conf.phymode == MODE_ATHEROS_TURBO) {
 393                 /*
 394                  * OFDM:
 395                  *
 396                  * N_DBPS = DATARATE x 4
 397                  * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
 398                  *      (16 = SIGNAL time, 6 = tail bits)
 399                  * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
 400                  *
 401                  * T_SYM = 4 usec
 402                  * 802.11a - 17.5.2: aSIFSTime = 16 usec
 403                  * 802.11g - 19.8.4: aSIFSTime = 10 usec +
 404                  *      signal ext = 6 usec
 405                  */
 406                 /* FIX: Atheros Turbo may have different (shorter) duration? */
 407                 dur = 16; /* SIFS + signal ext */
 408                 dur += 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */
 409                 dur += 4; /* 17.3.2.3: T_SIGNAL = 4 usec */
 410                 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
 411                                         4 * rate); /* T_SYM x N_SYM */
 412         } else {
 413                 /*
 414                  * 802.11b or 802.11g with 802.11b compatibility:
 415                  * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
 416                  * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
 417                  *
 418                  * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
 419                  * aSIFSTime = 10 usec
 420                  * aPreambleLength = 144 usec or 72 usec with short preamble
 421                  * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
 422                  */
 423                 dur = 10; /* aSIFSTime = 10 usec */
 424                 dur += short_preamble ? (72 + 24) : (144 + 48);
 425
 426                 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
 427         }
 428
 429         return dur;
 430 }
 431
 432
 433 /* Exported duration function for driver use */
 434 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
 435                                         size_t frame_len, int rate)
 436 {
 437         struct ieee80211_local *local = hw_to_local(hw);
 438         u16 dur;
 439         int erp;
 440
 441         erp = ieee80211_is_erp_rate(hw->conf.phymode, rate);
 442         dur = ieee80211_frame_duration(local, frame_len, rate,
 443                                        erp, local->short_preamble);
 444
 445         return cpu_to_le16(dur);
 446 }
 447 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
 448
 449
 450 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
 451                               size_t frame_len,
 452                               const struct ieee80211_tx_control *frame_txctl)
 453 {
 454         struct ieee80211_local *local = hw_to_local(hw);
 455         struct ieee80211_rate *rate;
 456         int short_preamble = local->short_preamble;
 457         int erp;
 458         u16 dur;
 459
 460         rate = frame_txctl->rts_rate;
 461         erp = !!(rate->flags & IEEE80211_RATE_ERP);
 462
 463         /* CTS duration */
 464         dur = ieee80211_frame_duration(local, 10, rate->rate,
 465                                        erp, short_preamble);
 466         /* Data frame duration */
 467         dur += ieee80211_frame_duration(local, frame_len, rate->rate,
 468                                         erp, short_preamble);
 469         /* ACK duration */
 470         dur += ieee80211_frame_duration(local, 10, rate->rate,
 471                                         erp, short_preamble);
 472
 473         return cpu_to_le16(dur);
 474 }
 475 EXPORT_SYMBOL(ieee80211_rts_duration);
 476
 477
 478 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
 479                                     size_t frame_len,
 480                                     const struct ieee80211_tx_control *frame_txctl)
 481 {
 482         struct ieee80211_local *local = hw_to_local(hw);
 483         struct ieee80211_rate *rate;
 484         int short_preamble = local->short_preamble;
 485         int erp;
 486         u16 dur;
 487
 488         rate = frame_txctl->rts_rate;
 489         erp = !!(rate->flags & IEEE80211_RATE_ERP);
 490
 491         /* Data frame duration */
 492         dur = ieee80211_frame_duration(local, frame_len, rate->rate,
 493                                        erp, short_preamble);
 494         if (!(frame_txctl->flags & IEEE80211_TXCTL_NO_ACK)) {
 495                 /* ACK duration */
 496                 dur += ieee80211_frame_duration(local, 10, rate->rate,
 497                                                 erp, short_preamble);
 498         }
 499
 500         return cpu_to_le16(dur);
 501 }
 502 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
 503
 504 static int __ieee80211_if_config(struct net_device *dev,
 505                                  struct sk_buff *beacon,
 506                                  struct ieee80211_tx_control *control)
 507 {
 508         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 509         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 510         struct ieee80211_if_conf conf;
 511         static u8 scan_bssid[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 512
 513         if (!local->ops->config_interface || !netif_running(dev))
 514                 return 0;
 515
 516         memset(&conf, 0, sizeof(conf));
 517         conf.type = sdata->type;
 518         if (sdata->type == IEEE80211_IF_TYPE_STA ||
 519             sdata->type == IEEE80211_IF_TYPE_IBSS) {
 520                 if (local->sta_scanning &&
 521                     local->scan_dev == dev)
 522                         conf.bssid = scan_bssid;
 523                 else
 524                         conf.bssid = sdata->u.sta.bssid;
 525                 conf.ssid = sdata->u.sta.ssid;
 526                 conf.ssid_len = sdata->u.sta.ssid_len;
 527                 conf.generic_elem = sdata->u.sta.extra_ie;
 528                 conf.generic_elem_len = sdata->u.sta.extra_ie_len;
 529         } else if (sdata->type == IEEE80211_IF_TYPE_AP) {
 530                 conf.ssid = sdata->u.ap.ssid;
 531                 conf.ssid_len = sdata->u.ap.ssid_len;
 532                 conf.generic_elem = sdata->u.ap.generic_elem;
 533                 conf.generic_elem_len = sdata->u.ap.generic_elem_len;
 534                 conf.beacon = beacon;
 535                 conf.beacon_control = control;
 536         }
 537         return local->ops->config_interface(local_to_hw(local),
 538                                            dev->ifindex, &conf);
 539 }
 540
 541 int ieee80211_if_config(struct net_device *dev)
 542 {
 543         return __ieee80211_if_config(dev, NULL, NULL);
 544 }
 545
 546 int ieee80211_if_config_beacon(struct net_device *dev)
 547 {
 548         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 549         struct ieee80211_tx_control control;
 550         struct sk_buff *skb;
 551
 552         if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
 553                 return 0;
 554         skb = ieee80211_beacon_get(local_to_hw(local), dev->ifindex, &control);
 555         if (!skb)
 556                 return -ENOMEM;
 557         return __ieee80211_if_config(dev, skb, &control);
 558 }
 559
 560 int ieee80211_hw_config(struct ieee80211_local *local)
 561 {
 562         struct ieee80211_hw_mode *mode;
 563         struct ieee80211_channel *chan;
 564         int ret = 0;
 565
 566         if (local->sta_scanning) {
 567                 chan = local->scan_channel;
 568                 mode = local->scan_hw_mode;
 569         } else {
 570                 chan = local->oper_channel;
 571                 mode = local->oper_hw_mode;
 572         }
 573
 574         local->hw.conf.channel = chan->chan;
 575         local->hw.conf.channel_val = chan->val;
 576         local->hw.conf.power_level = chan->power_level;
 577         local->hw.conf.freq = chan->freq;
 578         local->hw.conf.phymode = mode->mode;
 579         local->hw.conf.antenna_max = chan->antenna_max;
 580         local->hw.conf.chan = chan;
 581         local->hw.conf.mode = mode;
 582
 583 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 584         printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d "
 585                "phymode=%d\n", local->hw.conf.channel, local->hw.conf.freq,
 586                local->hw.conf.phymode);
 587 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
 588
 589         if (local->ops->config)
 590                 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
 591
 592         return ret;
 593 }
 594
 595
 596 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
 597 {
 598         /* FIX: what would be proper limits for MTU?
 599          * This interface uses 802.3 frames. */
 600         if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6) {
 601                 printk(KERN_WARNING "%s: invalid MTU %d\n",
 602                        dev->name, new_mtu);
 603                 return -EINVAL;
 604         }
 605
 606 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 607         printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
 608 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
 609         dev->mtu = new_mtu;
 610         return 0;
 611 }
 612
 613
 614 static int ieee80211_change_mtu_apdev(struct net_device *dev, int new_mtu)
 615 {
 616         /* FIX: what would be proper limits for MTU?
 617          * This interface uses 802.11 frames. */
 618         if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN) {
 619                 printk(KERN_WARNING "%s: invalid MTU %d\n",
 620                        dev->name, new_mtu);
 621                 return -EINVAL;
 622         }
 623
 624 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 625         printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
 626 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
 627         dev->mtu = new_mtu;
 628         return 0;
 629 }
 630
 631 enum netif_tx_lock_class {
 632         TX_LOCK_NORMAL,
 633         TX_LOCK_MASTER,
 634 };
 635
 636 static inline void netif_tx_lock_nested(struct net_device *dev, int subclass)
 637 {
 638         spin_lock_nested(&dev->_xmit_lock, subclass);
 639         dev->xmit_lock_owner = smp_processor_id();
 640 }
 641
 642 static void ieee80211_set_multicast_list(struct net_device *dev)
 643 {
 644         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 645         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 646         unsigned short flags;
 647
 648         netif_tx_lock_nested(local->mdev, TX_LOCK_MASTER);
 649         if (((dev->flags & IFF_ALLMULTI) != 0) ^ (sdata->allmulti != 0)) {
 650                 if (sdata->allmulti) {
 651                         sdata->allmulti = 0;
 652                         local->iff_allmultis--;
 653                 } else {
 654                         sdata->allmulti = 1;
 655                         local->iff_allmultis++;
 656                 }
 657         }
 658         if (((dev->flags & IFF_PROMISC) != 0) ^ (sdata->promisc != 0)) {
 659                 if (sdata->promisc) {
 660                         sdata->promisc = 0;
 661                         local->iff_promiscs--;
 662                 } else {
 663                         sdata->promisc = 1;
 664                         local->iff_promiscs++;
 665                 }
 666         }
 667         if (dev->mc_count != sdata->mc_count) {
 668                 local->mc_count = local->mc_count - sdata->mc_count +
 669                                   dev->mc_count;
 670                 sdata->mc_count = dev->mc_count;
 671         }
 672         if (local->ops->set_multicast_list) {
 673                 flags = local->mdev->flags;
 674                 if (local->iff_allmultis)
 675                         flags |= IFF_ALLMULTI;
 676                 if (local->iff_promiscs)
 677                         flags |= IFF_PROMISC;
 678                 read_lock(&local->sub_if_lock);
 679                 local->ops->set_multicast_list(local_to_hw(local), flags,
 680                                               local->mc_count);
 681                 read_unlock(&local->sub_if_lock);
 682         }
 683         netif_tx_unlock(local->mdev);
 684 }
 685
 686 struct dev_mc_list *ieee80211_get_mc_list_item(struct ieee80211_hw *hw,
 687                                                struct dev_mc_list *prev,
 688                                                void **ptr)
 689 {
 690         struct ieee80211_local *local = hw_to_local(hw);
 691         struct ieee80211_sub_if_data *sdata = *ptr;
 692         struct dev_mc_list *mc;
 693
 694         if (!prev) {
 695                 WARN_ON(sdata);
 696                 sdata = NULL;
 697         }
 698         if (!prev || !prev->next) {
 699                 if (sdata)
 700                         sdata = list_entry(sdata->list.next,
 701                                            struct ieee80211_sub_if_data, list);
 702                 else
 703                         sdata = list_entry(local->sub_if_list.next,
 704                                            struct ieee80211_sub_if_data, list);
 705                 if (&sdata->list != &local->sub_if_list)
 706                         mc = sdata->dev->mc_list;
 707                 else
 708                         mc = NULL;
 709         } else
 710                 mc = prev->next;
 711
 712         *ptr = sdata;
 713         return mc;
 714 }
 715 EXPORT_SYMBOL(ieee80211_get_mc_list_item);
 716
 717 static struct net_device_stats *ieee80211_get_stats(struct net_device *dev)
 718 {
 719         struct ieee80211_sub_if_data *sdata;
 720         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 721         return &(sdata->stats);
 722 }
 723
 724 static void ieee80211_if_shutdown(struct net_device *dev)
 725 {
 726         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 727         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 728
 729         ASSERT_RTNL();
 730         switch (sdata->type) {
 731         case IEEE80211_IF_TYPE_STA:
 732         case IEEE80211_IF_TYPE_IBSS:
 733                 sdata->u.sta.state = IEEE80211_DISABLED;
 734                 del_timer_sync(&sdata->u.sta.timer);
 735                 skb_queue_purge(&sdata->u.sta.skb_queue);
 736                 if (!local->ops->hw_scan &&
 737                     local->scan_dev == sdata->dev) {
 738                         local->sta_scanning = 0;
 739                         cancel_delayed_work(&local->scan_work);
 740                 }
 741                 flush_workqueue(local->hw.workqueue);
 742                 break;
 743         }
 744 }
 745
 746 static inline int identical_mac_addr_allowed(int type1, int type2)
 747 {
 748         return (type1 == IEEE80211_IF_TYPE_MNTR ||
 749                 type2 == IEEE80211_IF_TYPE_MNTR ||
 750                 (type1 == IEEE80211_IF_TYPE_AP &&
 751                  type2 == IEEE80211_IF_TYPE_WDS) ||
 752                 (type1 == IEEE80211_IF_TYPE_WDS &&
 753                  (type2 == IEEE80211_IF_TYPE_WDS ||
 754                   type2 == IEEE80211_IF_TYPE_AP)) ||
 755                 (type1 == IEEE80211_IF_TYPE_AP &&
 756                  type2 == IEEE80211_IF_TYPE_VLAN) ||
 757                 (type1 == IEEE80211_IF_TYPE_VLAN &&
 758                  (type2 == IEEE80211_IF_TYPE_AP ||
 759                   type2 == IEEE80211_IF_TYPE_VLAN)));
 760 }
 761
 762 static int ieee80211_master_open(struct net_device *dev)
 763 {
 764         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 765         struct ieee80211_sub_if_data *sdata;
 766         int res = -EOPNOTSUPP;
 767
 768         read_lock(&local->sub_if_lock);
 769         list_for_each_entry(sdata, &local->sub_if_list, list) {
 770                 if (sdata->dev != dev && netif_running(sdata->dev)) {
 771                         res = 0;
 772                         break;
 773                 }
 774         }
 775         read_unlock(&local->sub_if_lock);
 776         return res;
 777 }
 778
 779 static int ieee80211_master_stop(struct net_device *dev)
 780 {
 781         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 782         struct ieee80211_sub_if_data *sdata;
 783
 784         read_lock(&local->sub_if_lock);
 785         list_for_each_entry(sdata, &local->sub_if_list, list)
 786                 if (sdata->dev != dev && netif_running(sdata->dev))
 787                         dev_close(sdata->dev);
 788         read_unlock(&local->sub_if_lock);
 789
 790         return 0;
 791 }
 792
 793 static int ieee80211_mgmt_open(struct net_device *dev)
 794 {
 795         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 796
 797         if (!netif_running(local->mdev))
 798                 return -EOPNOTSUPP;
 799         return 0;
 800 }
 801
 802 static int ieee80211_mgmt_stop(struct net_device *dev)
 803 {
 804         return 0;
 805 }
 806
 807 /* Check if running monitor interfaces should go to a "soft monitor" mode
 808  * and switch them if necessary. */
 809 static inline void ieee80211_start_soft_monitor(struct ieee80211_local *local)
 810 {
 811         struct ieee80211_if_init_conf conf;
 812
 813         if (local->open_count && local->open_count == local->monitors &&
 814             !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER) &&
 815             local->ops->remove_interface) {
 816                 conf.if_id = -1;
 817                 conf.type = IEEE80211_IF_TYPE_MNTR;
 818                 conf.mac_addr = NULL;
 819                 local->ops->remove_interface(local_to_hw(local), &conf);
 820         }
 821 }
 822
 823 /* Check if running monitor interfaces should go to a "hard monitor" mode
 824  * and switch them if necessary. */
 825 static void ieee80211_start_hard_monitor(struct ieee80211_local *local)
 826 {
 827         struct ieee80211_if_init_conf conf;
 828
 829         if (local->open_count && local->open_count == local->monitors &&
 830             !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
 831                 conf.if_id = -1;
 832                 conf.type = IEEE80211_IF_TYPE_MNTR;
 833                 conf.mac_addr = NULL;
 834                 local->ops->add_interface(local_to_hw(local), &conf);
 835         }
 836 }
 837
 838 static int ieee80211_open(struct net_device *dev)
 839 {
 840         struct ieee80211_sub_if_data *sdata, *nsdata;
 841         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 842         struct ieee80211_if_init_conf conf;
 843         int res;
 844
 845         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 846         read_lock(&local->sub_if_lock);
 847         list_for_each_entry(nsdata, &local->sub_if_list, list) {
 848                 struct net_device *ndev = nsdata->dev;
 849
 850                 if (ndev != dev && ndev != local->mdev && netif_running(ndev) &&
 851                     compare_ether_addr(dev->dev_addr, ndev->dev_addr) == 0 &&
 852                     !identical_mac_addr_allowed(sdata->type, nsdata->type)) {
 853                         read_unlock(&local->sub_if_lock);
 854                         return -ENOTUNIQ;
 855                 }
 856         }
 857         read_unlock(&local->sub_if_lock);
 858
 859         if (sdata->type == IEEE80211_IF_TYPE_WDS &&
 860             is_zero_ether_addr(sdata->u.wds.remote_addr))
 861                 return -ENOLINK;
 862
 863         if (sdata->type == IEEE80211_IF_TYPE_MNTR && local->open_count &&
 864             !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
 865                 /* run the interface in a "soft monitor" mode */
 866                 local->monitors++;
 867                 local->open_count++;
 868                 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
 869                 return 0;
 870         }
 871         ieee80211_start_soft_monitor(local);
 872
 873         conf.if_id = dev->ifindex;
 874         conf.type = sdata->type;
 875         conf.mac_addr = dev->dev_addr;
 876         res = local->ops->add_interface(local_to_hw(local), &conf);
 877         if (res) {
 878                 if (sdata->type == IEEE80211_IF_TYPE_MNTR)
 879                         ieee80211_start_hard_monitor(local);
 880                 return res;
 881         }
 882
 883         if (local->open_count == 0) {
 884                 res = 0;
 885                 tasklet_enable(&local->tx_pending_tasklet);
 886                 tasklet_enable(&local->tasklet);
 887                 if (local->ops->open)
 888                         res = local->ops->open(local_to_hw(local));
 889                 if (res == 0) {
 890                         res = dev_open(local->mdev);
 891                         if (res) {
 892                                 if (local->ops->stop)
 893                                         local->ops->stop(local_to_hw(local));
 894                         } else {
 895                                 res = ieee80211_hw_config(local);
 896                                 if (res && local->ops->stop)
 897                                         local->ops->stop(local_to_hw(local));
 898                                 else if (!res && local->apdev)
 899                                         dev_open(local->apdev);
 900                         }
 901                 }
 902                 if (res) {
 903                         if (local->ops->remove_interface)
 904                                 local->ops->remove_interface(local_to_hw(local),
 905                                                             &conf);
 906                         return res;
 907                 }
 908         }
 909         local->open_count++;
 910
 911         if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
 912                 local->monitors++;
 913                 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
 914         } else
 915                 ieee80211_if_config(dev);
 916
 917         if (sdata->type == IEEE80211_IF_TYPE_STA &&
 918             !local->user_space_mlme)
 919                 netif_carrier_off(dev);
 920         else
 921                 netif_carrier_on(dev);
 922
 923         netif_start_queue(dev);
 924         return 0;
 925 }
 926
 927
 928 static int ieee80211_stop(struct net_device *dev)
 929 {
 930         struct ieee80211_sub_if_data *sdata;
 931         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 932
 933         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 934
 935         if (sdata->type == IEEE80211_IF_TYPE_MNTR &&
 936             local->open_count > 1 &&
 937             !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
 938                 /* remove "soft monitor" interface */
 939                 local->open_count--;
 940                 local->monitors--;
 941                 if (!local->monitors)
 942                         local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
 943                 return 0;
 944         }
 945
 946         netif_stop_queue(dev);
 947         ieee80211_if_shutdown(dev);
 948
 949         if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
 950                 local->monitors--;
 951                 if (!local->monitors)
 952                         local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
 953         }
 954
 955         local->open_count--;
 956         if (local->open_count == 0) {
 957                 if (netif_running(local->mdev))
 958                         dev_close(local->mdev);
 959                 if (local->apdev)
 960                         dev_close(local->apdev);
 961                 if (local->ops->stop)
 962                         local->ops->stop(local_to_hw(local));
 963                 tasklet_disable(&local->tx_pending_tasklet);
 964                 tasklet_disable(&local->tasklet);
 965         }
 966         if (local->ops->remove_interface) {
 967                 struct ieee80211_if_init_conf conf;
 968
 969                 conf.if_id = dev->ifindex;
 970                 conf.type = sdata->type;
 971                 conf.mac_addr = dev->dev_addr;
 972                 local->ops->remove_interface(local_to_hw(local), &conf);
 973         }
 974
 975         ieee80211_start_hard_monitor(local);
 976
 977         return 0;
 978 }
 979
 980
 981 static int header_parse_80211(struct sk_buff *skb, unsigned char *haddr)
 982 {
 983         memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
 984         return ETH_ALEN;
 985 }
 986
 987 struct ieee80211_rate *
 988 ieee80211_get_rate(struct ieee80211_local *local, int phymode, int hw_rate)
 989 {
 990         struct ieee80211_hw_mode *mode;
 991         int r;
 992
 993         list_for_each_entry(mode, &local->modes_list, list) {
 994                 if (mode->mode != phymode)
 995                         continue;
 996                 for (r = 0; r < mode->num_rates; r++) {
 997                         struct ieee80211_rate *rate = &mode->rates[r];
 998                         if (rate->val == hw_rate ||
 999                             (rate->flags & IEEE80211_RATE_PREAMBLE2 &&
1000                              rate->val2 == hw_rate))
1001                                 return rate;
1002                 }
1003         }
1004
1005         return NULL;
1006 }
1007
1008 static void
1009 ieee80211_fill_frame_info(struct ieee80211_local *local,
1010                           struct ieee80211_frame_info *fi,
1011                           struct ieee80211_rx_status *status)
1012 {
1013         if (status) {
1014                 struct timespec ts;
1015                 struct ieee80211_rate *rate;
1016
1017                 jiffies_to_timespec(jiffies, &ts);
1018                 fi->hosttime = cpu_to_be64((u64) ts.tv_sec * 1000000 +
1019                                            ts.tv_nsec / 1000);
1020                 fi->mactime = cpu_to_be64(status->mactime);
1021                 switch (status->phymode) {
1022                 case MODE_IEEE80211A:
1023                         fi->phytype = htonl(ieee80211_phytype_ofdm_dot11_a);
1024                         break;
1025                 case MODE_IEEE80211B:
1026                         fi->phytype = htonl(ieee80211_phytype_dsss_dot11_b);
1027                         break;
1028                 case MODE_IEEE80211G:
1029                         fi->phytype = htonl(ieee80211_phytype_pbcc_dot11_g);
1030                         break;
1031                 case MODE_ATHEROS_TURBO:
1032                         fi->phytype =
1033                                 htonl(ieee80211_phytype_dsss_dot11_turbo);
1034                         break;
1035                 default:
1036                         fi->phytype = htonl(0xAAAAAAAA);
1037                         break;
1038                 }
1039                 fi->channel = htonl(status->channel);
1040                 rate = ieee80211_get_rate(local, status->phymode,
1041                                           status->rate);
1042                 if (rate) {
1043                         fi->datarate = htonl(rate->rate);
1044                         if (rate->flags & IEEE80211_RATE_PREAMBLE2) {
1045                                 if (status->rate == rate->val)
1046                                         fi->preamble = htonl(2); /* long */
1047                                 else if (status->rate == rate->val2)
1048                                         fi->preamble = htonl(1); /* short */
1049                         } else
1050                                 fi->preamble = htonl(0);
1051                 } else {
1052                         fi->datarate = htonl(0);
1053                         fi->preamble = htonl(0);
1054                 }
1055
1056                 fi->antenna = htonl(status->antenna);
1057                 fi->priority = htonl(0xffffffff); /* no clue */
1058                 fi->ssi_type = htonl(ieee80211_ssi_raw);
1059                 fi->ssi_signal = htonl(status->ssi);
1060                 fi->ssi_noise = 0x00000000;
1061                 fi->encoding = 0;
1062         } else {
1063                 /* clear everything because we really don't know.
1064                  * the msg_type field isn't present on monitor frames
1065                  * so we don't know whether it will be present or not,
1066                  * but it's ok to not clear it since it'll be assigned
1067                  * anyway */
1068                 memset(fi, 0, sizeof(*fi) - sizeof(fi->msg_type));
1069
1070                 fi->ssi_type = htonl(ieee80211_ssi_none);
1071         }
1072         fi->version = htonl(IEEE80211_FI_VERSION);
1073         fi->length = cpu_to_be32(sizeof(*fi) - sizeof(fi->msg_type));
1074 }
1075
1076 /* this routine is actually not just for this, but also
1077  * for pushing fake 'management' frames into userspace.
1078  * it shall be replaced by a netlink-based system. */
1079 void
1080 ieee80211_rx_mgmt(struct ieee80211_local *local, struct sk_buff *skb,
1081                   struct ieee80211_rx_status *status, u32 msg_type)
1082 {
1083         struct ieee80211_frame_info *fi;
1084         const size_t hlen = sizeof(struct ieee80211_frame_info);
1085         struct ieee80211_sub_if_data *sdata;
1086
1087         skb->dev = local->apdev;
1088
1089         sdata = IEEE80211_DEV_TO_SUB_IF(local->apdev);
1090
1091         if (skb_headroom(skb) < hlen) {
1092                 I802_DEBUG_INC(local->rx_expand_skb_head);
1093                 if (pskb_expand_head(skb, hlen, 0, GFP_ATOMIC)) {
1094                         dev_kfree_skb(skb);
1095                         return;
1096                 }
1097         }
1098
1099         fi = (struct ieee80211_frame_info *) skb_push(skb, hlen);
1100
1101         ieee80211_fill_frame_info(local, fi, status);
1102         fi->msg_type = htonl(msg_type);
1103
1104         sdata->stats.rx_packets++;
1105         sdata->stats.rx_bytes += skb->len;
1106
1107         skb_set_mac_header(skb, 0);
1108         skb->ip_summed = CHECKSUM_UNNECESSARY;
1109         skb->pkt_type = PACKET_OTHERHOST;
1110         skb->protocol = htons(ETH_P_802_2);
1111         memset(skb->cb, 0, sizeof(skb->cb));
1112         netif_rx(skb);
1113 }
1114
1115 int ieee80211_radar_status(struct ieee80211_hw *hw, int channel,
1116                            int radar, int radar_type)
1117 {
1118         struct sk_buff *skb;
1119         struct ieee80211_radar_info *msg;
1120         struct ieee80211_local *local = hw_to_local(hw);
1121
1122         if (!local->apdev)
1123                 return 0;
1124
1125         skb = dev_alloc_skb(sizeof(struct ieee80211_frame_info) +
1126                             sizeof(struct ieee80211_radar_info));
1127
1128         if (!skb)
1129                 return -ENOMEM;
1130         skb_reserve(skb, sizeof(struct ieee80211_frame_info));
1131
1132         msg = (struct ieee80211_radar_info *)
1133                 skb_put(skb, sizeof(struct ieee80211_radar_info));
1134         msg->channel = channel;
1135         msg->radar = radar;
1136         msg->radar_type = radar_type;
1137
1138         ieee80211_rx_mgmt(local, skb, NULL, ieee80211_msg_radar);
1139         return 0;
1140 }
1141 EXPORT_SYMBOL(ieee80211_radar_status);
1142
1143
1144 static void ieee80211_stat_refresh(unsigned long data)
1145 {
1146         struct ieee80211_local *local = (struct ieee80211_local *) data;
1147         struct sta_info *sta;
1148         struct ieee80211_sub_if_data *sdata;
1149
1150         if (!local->stat_time)
1151                 return;
1152
1153         /* go through all stations */
1154         spin_lock_bh(&local->sta_lock);
1155         list_for_each_entry(sta, &local->sta_list, list) {
1156                 sta->channel_use = (sta->channel_use_raw / local->stat_time) /
1157                         CHAN_UTIL_PER_10MS;
1158                 sta->channel_use_raw = 0;
1159         }
1160         spin_unlock_bh(&local->sta_lock);
1161
1162         /* go through all subinterfaces */
1163         read_lock(&local->sub_if_lock);
1164         list_for_each_entry(sdata, &local->sub_if_list, list) {
1165                 sdata->channel_use = (sdata->channel_use_raw /
1166                                       local->stat_time) / CHAN_UTIL_PER_10MS;
1167                 sdata->channel_use_raw = 0;
1168         }
1169         read_unlock(&local->sub_if_lock);
1170
1171         /* hardware interface */
1172         local->channel_use = (local->channel_use_raw /
1173                               local->stat_time) / CHAN_UTIL_PER_10MS;
1174         local->channel_use_raw = 0;
1175
1176         local->stat_timer.expires = jiffies + HZ * local->stat_time / 100;
1177         add_timer(&local->stat_timer);
1178 }
1179
1180
1181 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
1182                                  struct sk_buff *skb,
1183                                  struct ieee80211_tx_status *status)
1184 {
1185         struct ieee80211_local *local = hw_to_local(hw);
1186         struct ieee80211_tx_status *saved;
1187         int tmp;
1188
1189         skb->dev = local->mdev;
1190         saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC);
1191         if (unlikely(!saved)) {
1192                 if (net_ratelimit())
1193                         printk(KERN_WARNING "%s: Not enough memory, "
1194                                "dropping tx status", skb->dev->name);
1195                 /* should be dev_kfree_skb_irq, but due to this function being
1196                  * named _irqsafe instead of just _irq we can't be sure that
1197                  * people won't call it from non-irq contexts */
1198                 dev_kfree_skb_any(skb);
1199                 return;
1200         }
1201         memcpy(saved, status, sizeof(struct ieee80211_tx_status));
1202         /* copy pointer to saved status into skb->cb for use by tasklet */
1203         memcpy(skb->cb, &saved, sizeof(saved));
1204
1205         skb->pkt_type = IEEE80211_TX_STATUS_MSG;
1206         skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ?
1207                        &local->skb_queue : &local->skb_queue_unreliable, skb);
1208         tmp = skb_queue_len(&local->skb_queue) +
1209                 skb_queue_len(&local->skb_queue_unreliable);
1210         while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
1211                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
1212                 memcpy(&saved, skb->cb, sizeof(saved));
1213                 kfree(saved);
1214                 dev_kfree_skb_irq(skb);
1215                 tmp--;
1216                 I802_DEBUG_INC(local->tx_status_drop);
1217         }
1218         tasklet_schedule(&local->tasklet);
1219 }
1220 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
1221
1222 static void ieee80211_tasklet_handler(unsigned long data)
1223 {
1224         struct ieee80211_local *local = (struct ieee80211_local *) data;
1225         struct sk_buff *skb;
1226         struct ieee80211_rx_status rx_status;
1227         struct ieee80211_tx_status *tx_status;
1228
1229         while ((skb = skb_dequeue(&local->skb_queue)) ||
1230                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
1231                 switch (skb->pkt_type) {
1232                 case IEEE80211_RX_MSG:
1233                         /* status is in skb->cb */
1234                         memcpy(&rx_status, skb->cb, sizeof(rx_status));
1235                         /* Clear skb->type in order to not confuse kernel
1236                          * netstack. */
1237                         skb->pkt_type = 0;
1238                         __ieee80211_rx(local_to_hw(local), skb, &rx_status);
1239                         break;
1240                 case IEEE80211_TX_STATUS_MSG:
1241                         /* get pointer to saved status out of skb->cb */
1242                         memcpy(&tx_status, skb->cb, sizeof(tx_status));
1243                         skb->pkt_type = 0;
1244                         ieee80211_tx_status(local_to_hw(local),
1245                                             skb, tx_status);
1246                         kfree(tx_status);
1247                         break;
1248                 default: /* should never get here! */
1249                         printk(KERN_ERR "%s: Unknown message type (%d)\n",
1250                                local->mdev->name, skb->pkt_type);
1251                         dev_kfree_skb(skb);
1252                         break;
1253                 }
1254         }
1255 }
1256
1257
1258 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
1259  * make a prepared TX frame (one that has been given to hw) to look like brand
1260  * new IEEE 802.11 frame that is ready to go through TX processing again.
1261  * Also, tx_packet_data in cb is restored from tx_control. */
1262 static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
1263                                       struct ieee80211_key *key,
1264                                       struct sk_buff *skb,
1265                                       struct ieee80211_tx_control *control)
1266 {
1267         int hdrlen, iv_len, mic_len;
1268         struct ieee80211_tx_packet_data *pkt_data;
1269
1270         pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
1271         pkt_data->ifindex = control->ifindex;
1272         pkt_data->mgmt_iface = (control->type == IEEE80211_IF_TYPE_MGMT);
1273         pkt_data->req_tx_status = !!(control->flags & IEEE80211_TXCTL_REQ_TX_STATUS);
1274         pkt_data->do_not_encrypt = !!(control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT);
1275         pkt_data->requeue = !!(control->flags & IEEE80211_TXCTL_REQUEUE);
1276         pkt_data->queue = control->queue;
1277
1278         hdrlen = ieee80211_get_hdrlen_from_skb(skb);
1279
1280         if (!key)
1281                 goto no_key;
1282
1283         switch (key->alg) {
1284         case ALG_WEP:
1285                 iv_len = WEP_IV_LEN;
1286                 mic_len = WEP_ICV_LEN;
1287                 break;
1288         case ALG_TKIP:
1289                 iv_len = TKIP_IV_LEN;
1290                 mic_len = TKIP_ICV_LEN;
1291                 break;
1292         case ALG_CCMP:
1293                 iv_len = CCMP_HDR_LEN;
1294                 mic_len = CCMP_MIC_LEN;
1295                 break;
1296         default:
1297                 goto no_key;
1298         }
1299
1300         if (skb->len >= mic_len && key->force_sw_encrypt)
1301                 skb_trim(skb, skb->len - mic_len);
1302         if (skb->len >= iv_len && skb->len > hdrlen) {
1303                 memmove(skb->data + iv_len, skb->data, hdrlen);
1304                 skb_pull(skb, iv_len);
1305         }
1306
1307 no_key:
1308         {
1309                 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1310                 u16 fc = le16_to_cpu(hdr->frame_control);
1311                 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
1312                         fc &= ~IEEE80211_STYPE_QOS_DATA;
1313                         hdr->frame_control = cpu_to_le16(fc);
1314                         memmove(skb->data + 2, skb->data, hdrlen - 2);
1315                         skb_pull(skb, 2);
1316                 }
1317         }
1318 }
1319
1320
1321 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
1322                          struct ieee80211_tx_status *status)
1323 {
1324         struct sk_buff *skb2;
1325         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1326         struct ieee80211_local *local = hw_to_local(hw);
1327         u16 frag, type;
1328         u32 msg_type;
1329         struct ieee80211_tx_status_rtap_hdr *rthdr;
1330         struct ieee80211_sub_if_data *sdata;
1331         int monitors;
1332
1333         if (!status) {
1334                 printk(KERN_ERR
1335                        "%s: ieee80211_tx_status called with NULL status\n",
1336                        local->mdev->name);
1337                 dev_kfree_skb(skb);
1338                 return;
1339         }
1340
1341         if (status->excessive_retries) {
1342                 struct sta_info *sta;
1343                 sta = sta_info_get(local, hdr->addr1);
1344                 if (sta) {
1345                         if (sta->flags & WLAN_STA_PS) {
1346                                 /* The STA is in power save mode, so assume
1347                                  * that this TX packet failed because of that.
1348                                  */
1349                                 status->excessive_retries = 0;
1350                                 status->flags |= IEEE80211_TX_STATUS_TX_FILTERED;
1351                         }
1352                         sta_info_put(sta);
1353                 }
1354         }
1355
1356         if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
1357                 struct sta_info *sta;
1358                 sta = sta_info_get(local, hdr->addr1);
1359                 if (sta) {
1360                         sta->tx_filtered_count++;
1361
1362                         /* Clear the TX filter mask for this STA when sending
1363                          * the next packet. If the STA went to power save mode,
1364                          * this will happen when it is waking up for the next
1365                          * time. */
1366                         sta->clear_dst_mask = 1;
1367
1368                         /* TODO: Is the WLAN_STA_PS flag always set here or is
1369                          * the race between RX and TX status causing some
1370                          * packets to be filtered out before 80211.o gets an
1371                          * update for PS status? This seems to be the case, so
1372                          * no changes are likely to be needed. */
1373                         if (sta->flags & WLAN_STA_PS &&
1374                             skb_queue_len(&sta->tx_filtered) <
1375                             STA_MAX_TX_BUFFER) {
1376                                 ieee80211_remove_tx_extra(local, sta->key,
1377                                                           skb,
1378                                                           &status->control);
1379                                 skb_queue_tail(&sta->tx_filtered, skb);
1380                         } else if (!(sta->flags & WLAN_STA_PS) &&
1381                                    !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) {
1382                                 /* Software retry the packet once */
1383                                 status->control.flags |= IEEE80211_TXCTL_REQUEUE;
1384                                 ieee80211_remove_tx_extra(local, sta->key,
1385                                                           skb,
1386                                                           &status->control);
1387                                 dev_queue_xmit(skb);
1388                         } else {
1389                                 if (net_ratelimit()) {
1390                                         printk(KERN_DEBUG "%s: dropped TX "
1391                                                "filtered frame queue_len=%d "
1392                                                "PS=%d @%lu\n",
1393                                                local->mdev->name,
1394                                                skb_queue_len(
1395                                                        &sta->tx_filtered),
1396                                                !!(sta->flags & WLAN_STA_PS),
1397                                                jiffies);
1398                                 }
1399                                 dev_kfree_skb(skb);
1400                         }
1401                         sta_info_put(sta);
1402                         return;
1403                 }
1404         } else {
1405                 /* FIXME: STUPID to call this with both local and local->mdev */
1406                 rate_control_tx_status(local, local->mdev, skb, status);
1407         }
1408
1409         ieee80211_led_tx(local, 0);
1410
1411         /* SNMP counters
1412          * Fragments are passed to low-level drivers as separate skbs, so these
1413          * are actually fragments, not frames. Update frame counters only for
1414          * the first fragment of the frame. */
1415
1416         frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
1417         type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
1418
1419         if (status->flags & IEEE80211_TX_STATUS_ACK) {
1420                 if (frag == 0) {
1421                         local->dot11TransmittedFrameCount++;
1422                         if (is_multicast_ether_addr(hdr->addr1))
1423                                 local->dot11MulticastTransmittedFrameCount++;
1424                         if (status->retry_count > 0)
1425                                 local->dot11RetryCount++;
1426                         if (status->retry_count > 1)
1427                                 local->dot11MultipleRetryCount++;
1428                 }
1429
1430                 /* This counter shall be incremented for an acknowledged MPDU
1431                  * with an individual address in the address 1 field or an MPDU
1432                  * with a multicast address in the address 1 field of type Data
1433                  * or Management. */
1434                 if (!is_multicast_ether_addr(hdr->addr1) ||
1435                     type == IEEE80211_FTYPE_DATA ||
1436                     type == IEEE80211_FTYPE_MGMT)
1437                         local->dot11TransmittedFragmentCount++;
1438         } else {
1439                 if (frag == 0)
1440                         local->dot11FailedCount++;
1441         }
1442
1443         msg_type = (status->flags & IEEE80211_TX_STATUS_ACK) ?
1444                 ieee80211_msg_tx_callback_ack : ieee80211_msg_tx_callback_fail;
1445
1446         /* this was a transmitted frame, but now we want to reuse it */
1447         skb_orphan(skb);
1448
1449         if ((status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS) &&
1450             local->apdev) {
1451                 if (local->monitors) {
1452                         skb2 = skb_clone(skb, GFP_ATOMIC);
1453                 } else {
1454                         skb2 = skb;
1455                         skb = NULL;
1456                 }
1457
1458                 if (skb2)
1459                         /* Send frame to hostapd */
1460                         ieee80211_rx_mgmt(local, skb2, NULL, msg_type);
1461
1462                 if (!skb)
1463                         return;
1464         }
1465
1466         if (!local->monitors) {
1467                 dev_kfree_skb(skb);
1468                 return;
1469         }
1470
1471         /* send frame to monitor interfaces now */
1472
1473         if (skb_headroom(skb) < sizeof(*rthdr)) {
1474                 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
1475                 dev_kfree_skb(skb);
1476                 return;
1477         }
1478
1479         rthdr = (struct ieee80211_tx_status_rtap_hdr*)
1480                                 skb_push(skb, sizeof(*rthdr));
1481
1482         memset(rthdr, 0, sizeof(*rthdr));
1483         rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
1484         rthdr->hdr.it_present =
1485                 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
1486                             (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
1487
1488         if (!(status->flags & IEEE80211_TX_STATUS_ACK) &&
1489             !is_multicast_ether_addr(hdr->addr1))
1490                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
1491
1492         if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) &&
1493             (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT))
1494                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
1495         else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS)
1496                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
1497
1498         rthdr->data_retries = status->retry_count;
1499
1500         read_lock(&local->sub_if_lock);
1501         monitors = local->monitors;
1502         list_for_each_entry(sdata, &local->sub_if_list, list) {
1503                 /*
1504                  * Using the monitors counter is possibly racy, but
1505                  * if the value is wrong we simply either clone the skb
1506                  * once too much or forget sending it to one monitor iface
1507                  * The latter case isn't nice but fixing the race is much
1508                  * more complicated.
1509                  */
1510                 if (!monitors || !skb)
1511                         goto out;
1512
1513                 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
1514                         if (!netif_running(sdata->dev))
1515                                 continue;
1516                         monitors--;
1517                         if (monitors)
1518                                 skb2 = skb_clone(skb, GFP_KERNEL);
1519                         else
1520                                 skb2 = NULL;
1521                         skb->dev = sdata->dev;
1522                         /* XXX: is this sufficient for BPF? */
1523                         skb_set_mac_header(skb, 0);
1524                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1525                         skb->pkt_type = PACKET_OTHERHOST;
1526                         skb->protocol = htons(ETH_P_802_2);
1527                         memset(skb->cb, 0, sizeof(skb->cb));
1528                         netif_rx(skb);
1529                         skb = skb2;
1530                 }
1531         }
1532  out:
1533         read_unlock(&local->sub_if_lock);
1534         if (skb)
1535                 dev_kfree_skb(skb);
1536 }
1537 EXPORT_SYMBOL(ieee80211_tx_status);
1538
1539
1540 int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr)
1541 {
1542         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1543         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1544         struct sta_info *sta;
1545
1546         if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0)
1547                 return 0;
1548
1549         /* Create STA entry for the new peer */
1550         sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL);
1551         if (!sta)
1552                 return -ENOMEM;
1553         sta_info_put(sta);
1554
1555         /* Remove STA entry for the old peer */
1556         sta = sta_info_get(local, sdata->u.wds.remote_addr);
1557         if (sta) {
1558                 sta_info_put(sta);
1559                 sta_info_free(sta, 0);
1560         } else {
1561                 printk(KERN_DEBUG "%s: could not find STA entry for WDS link "
1562                        "peer " MAC_FMT "\n",
1563                        dev->name, MAC_ARG(sdata->u.wds.remote_addr));
1564         }
1565
1566         /* Update WDS link data */
1567         memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN);
1568
1569         return 0;
1570 }
1571
1572 /* Must not be called for mdev and apdev */
1573 void ieee80211_if_setup(struct net_device *dev)
1574 {
1575         ether_setup(dev);
1576         dev->hard_start_xmit = ieee80211_subif_start_xmit;
1577         dev->wireless_handlers = &ieee80211_iw_handler_def;
1578         dev->set_multicast_list = ieee80211_set_multicast_list;
1579         dev->change_mtu = ieee80211_change_mtu;
1580         dev->get_stats = ieee80211_get_stats;
1581         dev->open = ieee80211_open;
1582         dev->stop = ieee80211_stop;
1583         dev->uninit = ieee80211_if_reinit;
1584         dev->destructor = ieee80211_if_free;
1585 }
1586
1587 void ieee80211_if_mgmt_setup(struct net_device *dev)
1588 {
1589         ether_setup(dev);
1590         dev->hard_start_xmit = ieee80211_mgmt_start_xmit;
1591         dev->change_mtu = ieee80211_change_mtu_apdev;
1592         dev->get_stats = ieee80211_get_stats;
1593         dev->open = ieee80211_mgmt_open;
1594         dev->stop = ieee80211_mgmt_stop;
1595         dev->type = ARPHRD_IEEE80211_PRISM;
1596         dev->hard_header_parse = header_parse_80211;
1597         dev->uninit = ieee80211_if_reinit;
1598         dev->destructor = ieee80211_if_free;
1599 }
1600
1601 int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local,
1602                                  const char *name)
1603 {
1604         struct rate_control_ref *ref, *old;
1605
1606         ASSERT_RTNL();
1607         if (local->open_count || netif_running(local->mdev) ||
1608             (local->apdev && netif_running(local->apdev)))
1609                 return -EBUSY;
1610
1611         ref = rate_control_alloc(name, local);
1612         if (!ref) {
1613                 printk(KERN_WARNING "%s: Failed to select rate control "
1614                        "algorithm\n", local->mdev->name);
1615                 return -ENOENT;
1616         }
1617
1618         old = local->rate_ctrl;
1619         local->rate_ctrl = ref;
1620         if (old) {
1621                 rate_control_put(old);
1622                 sta_info_flush(local, NULL);
1623         }
1624
1625         printk(KERN_DEBUG "%s: Selected rate control "
1626                "algorithm '%s'\n", local->mdev->name,
1627                ref->ops->name);
1628
1629
1630         return 0;
1631 }
1632
1633 static void rate_control_deinitialize(struct ieee80211_local *local)
1634 {
1635         struct rate_control_ref *ref;
1636
1637         ref = local->rate_ctrl;
1638         local->rate_ctrl = NULL;
1639         rate_control_put(ref);
1640 }
1641
1642 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
1643                                         const struct ieee80211_ops *ops)
1644 {
1645         struct net_device *mdev;
1646         struct ieee80211_local *local;
1647         struct ieee80211_sub_if_data *sdata;
1648         int priv_size;
1649         struct wiphy *wiphy;
1650
1651         /* Ensure 32-byte alignment of our private data and hw private data.
1652          * We use the wiphy priv data for both our ieee80211_local and for
1653          * the driver's private data
1654          *
1655          * In memory it'll be like this:
1656          *
1657          * +-------------------------+
1658          * | struct wiphy           |
1659          * +-------------------------+
1660          * | struct ieee80211_local  |
1661          * +-------------------------+
1662          * | driver's private data   |
1663          * +-------------------------+
1664          *
1665          */
1666         priv_size = ((sizeof(struct ieee80211_local) +
1667                       NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1668                     priv_data_len;
1669
1670         wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1671
1672         if (!wiphy)
1673                 return NULL;
1674
1675         wiphy->privid = mac80211_wiphy_privid;
1676
1677         local = wiphy_priv(wiphy);
1678         local->hw.wiphy = wiphy;
1679
1680         local->hw.priv = (char *)local +
1681                          ((sizeof(struct ieee80211_local) +
1682                            NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1683
1684         BUG_ON(!ops->tx);
1685         BUG_ON(!ops->config);
1686         BUG_ON(!ops->add_interface);
1687         local->ops = ops;
1688
1689         /* for now, mdev needs sub_if_data :/ */
1690         mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
1691                             "wmaster%d", ether_setup);
1692         if (!mdev) {
1693                 wiphy_free(wiphy);
1694                 return NULL;
1695         }
1696
1697         sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
1698         mdev->ieee80211_ptr = &sdata->wdev;
1699         sdata->wdev.wiphy = wiphy;
1700
1701         local->hw.queues = 1; /* default */
1702
1703         local->mdev = mdev;
1704         local->rx_pre_handlers = ieee80211_rx_pre_handlers;
1705         local->rx_handlers = ieee80211_rx_handlers;
1706         local->tx_handlers = ieee80211_tx_handlers;
1707
1708         local->bridge_packets = 1;
1709
1710         local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1711         local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1712         local->short_retry_limit = 7;
1713         local->long_retry_limit = 4;
1714         local->hw.conf.radio_enabled = 1;
1715
1716         local->enabled_modes = (unsigned int) -1;
1717
1718         INIT_LIST_HEAD(&local->modes_list);
1719
1720         rwlock_init(&local->sub_if_lock);
1721         INIT_LIST_HEAD(&local->sub_if_list);
1722
1723         INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
1724         init_timer(&local->stat_timer);
1725         local->stat_timer.function = ieee80211_stat_refresh;
1726         local->stat_timer.data = (unsigned long) local;
1727         ieee80211_rx_bss_list_init(mdev);
1728
1729         sta_info_init(local);
1730
1731         mdev->hard_start_xmit = ieee80211_master_start_xmit;
1732         mdev->open = ieee80211_master_open;
1733         mdev->stop = ieee80211_master_stop;
1734         mdev->type = ARPHRD_IEEE80211;
1735         mdev->hard_header_parse = header_parse_80211;
1736
1737         sdata->type = IEEE80211_IF_TYPE_AP;
1738         sdata->dev = mdev;
1739         sdata->local = local;
1740         sdata->u.ap.force_unicast_rateidx = -1;
1741         sdata->u.ap.max_ratectrl_rateidx = -1;
1742         ieee80211_if_sdata_init(sdata);
1743         list_add_tail(&sdata->list, &local->sub_if_list);
1744
1745         tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1746                      (unsigned long)local);
1747         tasklet_disable(&local->tx_pending_tasklet);
1748
1749         tasklet_init(&local->tasklet,
1750                      ieee80211_tasklet_handler,
1751                      (unsigned long) local);
1752         tasklet_disable(&local->tasklet);
1753
1754         skb_queue_head_init(&local->skb_queue);
1755         skb_queue_head_init(&local->skb_queue_unreliable);
1756
1757         return local_to_hw(local);
1758 }
1759 EXPORT_SYMBOL(ieee80211_alloc_hw);
1760
1761 int ieee80211_register_hw(struct ieee80211_hw *hw)
1762 {
1763         struct ieee80211_local *local = hw_to_local(hw);
1764         const char *name;
1765         int result;
1766
1767         result = wiphy_register(local->hw.wiphy);
1768         if (result < 0)
1769                 return result;
1770
1771         name = wiphy_dev(local->hw.wiphy)->driver->name;
1772         local->hw.workqueue = create_singlethread_workqueue(name);
1773         if (!local->hw.workqueue) {
1774                 result = -ENOMEM;
1775                 goto fail_workqueue;
1776         }
1777
1778         /*
1779          * The hardware needs headroom for sending the frame,
1780          * and we need some headroom for passing the frame to monitor
1781          * interfaces, but never both at the same time.
1782          */
1783         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1784                                    sizeof(struct ieee80211_tx_status_rtap_hdr));
1785
1786         debugfs_hw_add(local);
1787
1788         local->hw.conf.beacon_int = 1000;
1789
1790         local->wstats_flags |= local->hw.max_rssi ?
1791                                IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID;
1792         local->wstats_flags |= local->hw.max_signal ?
1793                                IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1794         local->wstats_flags |= local->hw.max_noise ?
1795                                IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1796         if (local->hw.max_rssi < 0 || local->hw.max_noise < 0)
1797                 local->wstats_flags |= IW_QUAL_DBM;
1798
1799         result = sta_info_start(local);
1800         if (result < 0)
1801                 goto fail_sta_info;
1802
1803         rtnl_lock();
1804         result = dev_alloc_name(local->mdev, local->mdev->name);
1805         if (result < 0)
1806                 goto fail_dev;
1807
1808         memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1809         SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1810
1811         result = register_netdevice(local->mdev);
1812         if (result < 0)
1813                 goto fail_dev;
1814
1815         ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1816
1817         result = ieee80211_init_rate_ctrl_alg(local, NULL);
1818         if (result < 0) {
1819                 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1820                        "algorithm\n", local->mdev->name);
1821                 goto fail_rate;
1822         }
1823
1824         result = ieee80211_wep_init(local);
1825
1826         if (result < 0) {
1827                 printk(KERN_DEBUG "%s: Failed to initialize wep\n",
1828                        local->mdev->name);
1829                 goto fail_wep;
1830         }
1831
1832         ieee80211_install_qdisc(local->mdev);
1833
1834         /* add one default STA interface */
1835         result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
1836                                   IEEE80211_IF_TYPE_STA);
1837         if (result)
1838                 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1839                        local->mdev->name);
1840
1841         local->reg_state = IEEE80211_DEV_REGISTERED;
1842         rtnl_unlock();
1843
1844         ieee80211_led_init(local);
1845
1846         return 0;
1847
1848 fail_wep:
1849         rate_control_deinitialize(local);
1850 fail_rate:
1851         ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1852         unregister_netdevice(local->mdev);
1853 fail_dev:
1854         rtnl_unlock();
1855         sta_info_stop(local);
1856 fail_sta_info:
1857         debugfs_hw_del(local);
1858         destroy_workqueue(local->hw.workqueue);
1859 fail_workqueue:
1860         wiphy_unregister(local->hw.wiphy);
1861         return result;
1862 }
1863 EXPORT_SYMBOL(ieee80211_register_hw);
1864
1865 int ieee80211_register_hwmode(struct ieee80211_hw *hw,
1866                               struct ieee80211_hw_mode *mode)
1867 {
1868         struct ieee80211_local *local = hw_to_local(hw);
1869         struct ieee80211_rate *rate;
1870         int i;
1871
1872         INIT_LIST_HEAD(&mode->list);
1873         list_add_tail(&mode->list, &local->modes_list);
1874
1875         local->hw_modes |= (1 << mode->mode);
1876         for (i = 0; i < mode->num_rates; i++) {
1877                 rate = &(mode->rates[i]);
1878                 rate->rate_inv = CHAN_UTIL_RATE_LCM / rate->rate;
1879         }
1880         ieee80211_prepare_rates(local, mode);
1881
1882         if (!local->oper_hw_mode) {
1883                 /* Default to this mode */
1884                 local->hw.conf.phymode = mode->mode;
1885                 local->oper_hw_mode = local->scan_hw_mode = mode;
1886                 local->oper_channel = local->scan_channel = &mode->channels[0];
1887                 local->hw.conf.mode = local->oper_hw_mode;
1888                 local->hw.conf.chan = local->oper_channel;
1889         }
1890
1891         if (!(hw->flags & IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED))
1892                 ieee80211_set_default_regdomain(mode);
1893
1894         return 0;
1895 }
1896 EXPORT_SYMBOL(ieee80211_register_hwmode);
1897
1898 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1899 {
1900         struct ieee80211_local *local = hw_to_local(hw);
1901         struct ieee80211_sub_if_data *sdata, *tmp;
1902         struct list_head tmp_list;
1903         int i;
1904
1905         tasklet_kill(&local->tx_pending_tasklet);
1906         tasklet_kill(&local->tasklet);
1907
1908         rtnl_lock();
1909
1910         BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
1911
1912         local->reg_state = IEEE80211_DEV_UNREGISTERED;
1913         if (local->apdev)
1914                 ieee80211_if_del_mgmt(local);
1915
1916         write_lock_bh(&local->sub_if_lock);
1917         list_replace_init(&local->sub_if_list, &tmp_list);
1918         write_unlock_bh(&local->sub_if_lock);
1919
1920         list_for_each_entry_safe(sdata, tmp, &tmp_list, list)
1921                 __ieee80211_if_del(local, sdata);
1922
1923         rtnl_unlock();
1924
1925         if (local->stat_time)
1926                 del_timer_sync(&local->stat_timer);
1927
1928         ieee80211_rx_bss_list_deinit(local->mdev);
1929         ieee80211_clear_tx_pending(local);
1930         sta_info_stop(local);
1931         rate_control_deinitialize(local);
1932         debugfs_hw_del(local);
1933
1934         for (i = 0; i < NUM_IEEE80211_MODES; i++) {
1935                 kfree(local->supp_rates[i]);
1936                 kfree(local->basic_rates[i]);
1937         }
1938
1939         if (skb_queue_len(&local->skb_queue)
1940                         || skb_queue_len(&local->skb_queue_unreliable))
1941                 printk(KERN_WARNING "%s: skb_queue not empty\n",
1942                        local->mdev->name);
1943         skb_queue_purge(&local->skb_queue);
1944         skb_queue_purge(&local->skb_queue_unreliable);
1945
1946         destroy_workqueue(local->hw.workqueue);
1947         wiphy_unregister(local->hw.wiphy);
1948         ieee80211_wep_free(local);
1949         ieee80211_led_exit(local);
1950 }
1951 EXPORT_SYMBOL(ieee80211_unregister_hw);
1952
1953 void ieee80211_free_hw(struct ieee80211_hw *hw)
1954 {
1955         struct ieee80211_local *local = hw_to_local(hw);
1956
1957         ieee80211_if_free(local->mdev);
1958         wiphy_free(local->hw.wiphy);
1959 }
1960 EXPORT_SYMBOL(ieee80211_free_hw);
1961
1962 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
1963 {
1964         struct ieee80211_local *local = hw_to_local(hw);
1965
1966         if (test_and_clear_bit(IEEE80211_LINK_STATE_XOFF,
1967                                &local->state[queue])) {
1968                 if (test_bit(IEEE80211_LINK_STATE_PENDING,
1969                              &local->state[queue]))
1970                         tasklet_schedule(&local->tx_pending_tasklet);
1971                 else
1972                         if (!ieee80211_qdisc_installed(local->mdev)) {
1973                                 if (queue == 0)
1974                                         netif_wake_queue(local->mdev);
1975                         } else
1976                                 __netif_schedule(local->mdev);
1977         }
1978 }
1979 EXPORT_SYMBOL(ieee80211_wake_queue);
1980
1981 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
1982 {
1983         struct ieee80211_local *local = hw_to_local(hw);
1984
1985         if (!ieee80211_qdisc_installed(local->mdev) && queue == 0)
1986                 netif_stop_queue(local->mdev);
1987         set_bit(IEEE80211_LINK_STATE_XOFF, &local->state[queue]);
1988 }
1989 EXPORT_SYMBOL(ieee80211_stop_queue);
1990
1991 void ieee80211_start_queues(struct ieee80211_hw *hw)
1992 {
1993         struct ieee80211_local *local = hw_to_local(hw);
1994         int i;
1995
1996         for (i = 0; i < local->hw.queues; i++)
1997                 clear_bit(IEEE80211_LINK_STATE_XOFF, &local->state[i]);
1998         if (!ieee80211_qdisc_installed(local->mdev))
1999                 netif_start_queue(local->mdev);
2000 }
2001 EXPORT_SYMBOL(ieee80211_start_queues);
2002
2003 void ieee80211_stop_queues(struct ieee80211_hw *hw)
2004 {
2005         int i;
2006
2007         for (i = 0; i < hw->queues; i++)
2008                 ieee80211_stop_queue(hw, i);
2009 }
2010 EXPORT_SYMBOL(ieee80211_stop_queues);
2011
2012 void ieee80211_wake_queues(struct ieee80211_hw *hw)
2013 {
2014         int i;
2015
2016         for (i = 0; i < hw->queues; i++)
2017                 ieee80211_wake_queue(hw, i);
2018 }
2019 EXPORT_SYMBOL(ieee80211_wake_queues);
2020
2021 struct net_device_stats *ieee80211_dev_stats(struct net_device *dev)
2022 {
2023         struct ieee80211_sub_if_data *sdata;
2024         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2025         return &sdata->stats;
2026 }
2027
2028 static int __init ieee80211_init(void)
2029 {
2030         struct sk_buff *skb;
2031         int ret;
2032
2033         BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb));
2034
2035         ret = ieee80211_wme_register();
2036         if (ret) {
2037                 printk(KERN_DEBUG "ieee80211_init: failed to "
2038                        "initialize WME (err=%d)\n", ret);
2039                 return ret;
2040         }
2041
2042         ieee80211_debugfs_netdev_init();
2043         ieee80211_regdomain_init();
2044
2045         return 0;
2046 }
2047
2048
2049 static void __exit ieee80211_exit(void)
2050 {
2051         ieee80211_wme_unregister();
2052         ieee80211_debugfs_netdev_exit();
2053 }
2054
2055
2056 subsys_initcall(ieee80211_init);
2057 module_exit(ieee80211_exit);
2058
2059 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
2060 MODULE_LICENSE("GPL");