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