err.no Git - 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
  37 /*
  38  * For seeing transmitted packets on monitor interfaces
  39  * we have a radiotap header too.
  40  */
  41 struct ieee80211_tx_status_rtap_hdr {
  42         struct ieee80211_radiotap_header hdr;
  43         __le16 tx_flags;
  44         u8 data_retries;
  45 } __attribute__ ((packed));
  46
  47 /* common interface routines */
  48
  49 static struct net_device_stats *ieee80211_get_stats(struct net_device *dev)
  50 {
  51         struct ieee80211_sub_if_data *sdata;
  52         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
  53         return &(sdata->stats);
  54 }
  55
  56 static int header_parse_80211(struct sk_buff *skb, unsigned char *haddr)
  57 {
  58         memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
  59         return ETH_ALEN;
  60 }
  61
  62 /* master interface */
  63
  64 static int ieee80211_master_open(struct net_device *dev)
  65 {
  66         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
  67         struct ieee80211_sub_if_data *sdata;
  68         int res = -EOPNOTSUPP;
  69
  70         read_lock(&local->sub_if_lock);
  71         list_for_each_entry(sdata, &local->sub_if_list, list) {
  72                 if (sdata->dev != dev && netif_running(sdata->dev)) {
  73                         res = 0;
  74                         break;
  75                 }
  76         }
  77         read_unlock(&local->sub_if_lock);
  78         return res;
  79 }
  80
  81 static int ieee80211_master_stop(struct net_device *dev)
  82 {
  83         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
  84         struct ieee80211_sub_if_data *sdata;
  85
  86         read_lock(&local->sub_if_lock);
  87         list_for_each_entry(sdata, &local->sub_if_list, list)
  88                 if (sdata->dev != dev && netif_running(sdata->dev))
  89                         dev_close(sdata->dev);
  90         read_unlock(&local->sub_if_lock);
  91
  92         return 0;
  93 }
  94
  95 /* management interface */
  96
  97 static void
  98 ieee80211_fill_frame_info(struct ieee80211_local *local,
  99                           struct ieee80211_frame_info *fi,
 100                           struct ieee80211_rx_status *status)
 101 {
 102         if (status) {
 103                 struct timespec ts;
 104                 struct ieee80211_rate *rate;
 105
 106                 jiffies_to_timespec(jiffies, &ts);
 107                 fi->hosttime = cpu_to_be64((u64) ts.tv_sec * 1000000 +
 108                                            ts.tv_nsec / 1000);
 109                 fi->mactime = cpu_to_be64(status->mactime);
 110                 switch (status->phymode) {
 111                 case MODE_IEEE80211A:
 112                         fi->phytype = htonl(ieee80211_phytype_ofdm_dot11_a);
 113                         break;
 114                 case MODE_IEEE80211B:
 115                         fi->phytype = htonl(ieee80211_phytype_dsss_dot11_b);
 116                         break;
 117                 case MODE_IEEE80211G:
 118                         fi->phytype = htonl(ieee80211_phytype_pbcc_dot11_g);
 119                         break;
 120                 case MODE_ATHEROS_TURBO:
 121                         fi->phytype =
 122                                 htonl(ieee80211_phytype_dsss_dot11_turbo);
 123                         break;
 124                 default:
 125                         fi->phytype = htonl(0xAAAAAAAA);
 126                         break;
 127                 }
 128                 fi->channel = htonl(status->channel);
 129                 rate = ieee80211_get_rate(local, status->phymode,
 130                                           status->rate);
 131                 if (rate) {
 132                         fi->datarate = htonl(rate->rate);
 133                         if (rate->flags & IEEE80211_RATE_PREAMBLE2) {
 134                                 if (status->rate == rate->val)
 135                                         fi->preamble = htonl(2); /* long */
 136                                 else if (status->rate == rate->val2)
 137                                         fi->preamble = htonl(1); /* short */
 138                         } else
 139                                 fi->preamble = htonl(0);
 140                 } else {
 141                         fi->datarate = htonl(0);
 142                         fi->preamble = htonl(0);
 143                 }
 144
 145                 fi->antenna = htonl(status->antenna);
 146                 fi->priority = htonl(0xffffffff); /* no clue */
 147                 fi->ssi_type = htonl(ieee80211_ssi_raw);
 148                 fi->ssi_signal = htonl(status->ssi);
 149                 fi->ssi_noise = 0x00000000;
 150                 fi->encoding = 0;
 151         } else {
 152                 /* clear everything because we really don't know.
 153                  * the msg_type field isn't present on monitor frames
 154                  * so we don't know whether it will be present or not,
 155                  * but it's ok to not clear it since it'll be assigned
 156                  * anyway */
 157                 memset(fi, 0, sizeof(*fi) - sizeof(fi->msg_type));
 158
 159                 fi->ssi_type = htonl(ieee80211_ssi_none);
 160         }
 161         fi->version = htonl(IEEE80211_FI_VERSION);
 162         fi->length = cpu_to_be32(sizeof(*fi) - sizeof(fi->msg_type));
 163 }
 164
 165 /* this routine is actually not just for this, but also
 166  * for pushing fake 'management' frames into userspace.
 167  * it shall be replaced by a netlink-based system. */
 168 void
 169 ieee80211_rx_mgmt(struct ieee80211_local *local, struct sk_buff *skb,
 170                   struct ieee80211_rx_status *status, u32 msg_type)
 171 {
 172         struct ieee80211_frame_info *fi;
 173         const size_t hlen = sizeof(struct ieee80211_frame_info);
 174         struct ieee80211_sub_if_data *sdata;
 175
 176         skb->dev = local->apdev;
 177
 178         sdata = IEEE80211_DEV_TO_SUB_IF(local->apdev);
 179
 180         if (skb_headroom(skb) < hlen) {
 181                 I802_DEBUG_INC(local->rx_expand_skb_head);
 182                 if (pskb_expand_head(skb, hlen, 0, GFP_ATOMIC)) {
 183                         dev_kfree_skb(skb);
 184                         return;
 185                 }
 186         }
 187
 188         fi = (struct ieee80211_frame_info *) skb_push(skb, hlen);
 189
 190         ieee80211_fill_frame_info(local, fi, status);
 191         fi->msg_type = htonl(msg_type);
 192
 193         sdata->stats.rx_packets++;
 194         sdata->stats.rx_bytes += skb->len;
 195
 196         skb_set_mac_header(skb, 0);
 197         skb->ip_summed = CHECKSUM_UNNECESSARY;
 198         skb->pkt_type = PACKET_OTHERHOST;
 199         skb->protocol = htons(ETH_P_802_2);
 200         memset(skb->cb, 0, sizeof(skb->cb));
 201         netif_rx(skb);
 202 }
 203
 204 int ieee80211_radar_status(struct ieee80211_hw *hw, int channel,
 205                            int radar, int radar_type)
 206 {
 207         struct sk_buff *skb;
 208         struct ieee80211_radar_info *msg;
 209         struct ieee80211_local *local = hw_to_local(hw);
 210
 211         if (!local->apdev)
 212                 return 0;
 213
 214         skb = dev_alloc_skb(sizeof(struct ieee80211_frame_info) +
 215                             sizeof(struct ieee80211_radar_info));
 216
 217         if (!skb)
 218                 return -ENOMEM;
 219         skb_reserve(skb, sizeof(struct ieee80211_frame_info));
 220
 221         msg = (struct ieee80211_radar_info *)
 222                 skb_put(skb, sizeof(struct ieee80211_radar_info));
 223         msg->channel = channel;
 224         msg->radar = radar;
 225         msg->radar_type = radar_type;
 226
 227         ieee80211_rx_mgmt(local, skb, NULL, ieee80211_msg_radar);
 228         return 0;
 229 }
 230 EXPORT_SYMBOL(ieee80211_radar_status);
 231
 232 void ieee80211_key_threshold_notify(struct net_device *dev,
 233                                     struct ieee80211_key *key,
 234                                     struct sta_info *sta)
 235 {
 236         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 237         struct sk_buff *skb;
 238         struct ieee80211_msg_key_notification *msg;
 239
 240         /* if no one will get it anyway, don't even allocate it.
 241          * unlikely because this is only relevant for APs
 242          * where the device must be open... */
 243         if (unlikely(!local->apdev))
 244                 return;
 245
 246         skb = dev_alloc_skb(sizeof(struct ieee80211_frame_info) +
 247                             sizeof(struct ieee80211_msg_key_notification));
 248         if (!skb)
 249                 return;
 250
 251         skb_reserve(skb, sizeof(struct ieee80211_frame_info));
 252         msg = (struct ieee80211_msg_key_notification *)
 253                 skb_put(skb, sizeof(struct ieee80211_msg_key_notification));
 254         msg->tx_rx_count = key->tx_rx_count;
 255         memcpy(msg->ifname, dev->name, IFNAMSIZ);
 256         if (sta)
 257                 memcpy(msg->addr, sta->addr, ETH_ALEN);
 258         else
 259                 memset(msg->addr, 0xff, ETH_ALEN);
 260
 261         key->tx_rx_count = 0;
 262
 263         ieee80211_rx_mgmt(local, skb, NULL,
 264                           ieee80211_msg_key_threshold_notification);
 265 }
 266
 267 static int ieee80211_mgmt_open(struct net_device *dev)
 268 {
 269         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 270
 271         if (!netif_running(local->mdev))
 272                 return -EOPNOTSUPP;
 273         return 0;
 274 }
 275
 276 static int ieee80211_mgmt_stop(struct net_device *dev)
 277 {
 278         return 0;
 279 }
 280
 281 static int ieee80211_change_mtu_apdev(struct net_device *dev, int new_mtu)
 282 {
 283         /* FIX: what would be proper limits for MTU?
 284          * This interface uses 802.11 frames. */
 285         if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN) {
 286                 printk(KERN_WARNING "%s: invalid MTU %d\n",
 287                        dev->name, new_mtu);
 288                 return -EINVAL;
 289         }
 290
 291 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 292         printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
 293 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
 294         dev->mtu = new_mtu;
 295         return 0;
 296 }
 297
 298 void ieee80211_if_mgmt_setup(struct net_device *dev)
 299 {
 300         ether_setup(dev);
 301         dev->hard_start_xmit = ieee80211_mgmt_start_xmit;
 302         dev->change_mtu = ieee80211_change_mtu_apdev;
 303         dev->get_stats = ieee80211_get_stats;
 304         dev->open = ieee80211_mgmt_open;
 305         dev->stop = ieee80211_mgmt_stop;
 306         dev->type = ARPHRD_IEEE80211_PRISM;
 307         dev->hard_header_parse = header_parse_80211;
 308         dev->uninit = ieee80211_if_reinit;
 309         dev->destructor = ieee80211_if_free;
 310 }
 311
 312 /* regular interfaces */
 313
 314 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
 315 {
 316         /* FIX: what would be proper limits for MTU?
 317          * This interface uses 802.3 frames. */
 318         if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6) {
 319                 printk(KERN_WARNING "%s: invalid MTU %d\n",
 320                        dev->name, new_mtu);
 321                 return -EINVAL;
 322         }
 323
 324 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 325         printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
 326 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
 327         dev->mtu = new_mtu;
 328         return 0;
 329 }
 330
 331 static inline int identical_mac_addr_allowed(int type1, int type2)
 332 {
 333         return (type1 == IEEE80211_IF_TYPE_MNTR ||
 334                 type2 == IEEE80211_IF_TYPE_MNTR ||
 335                 (type1 == IEEE80211_IF_TYPE_AP &&
 336                  type2 == IEEE80211_IF_TYPE_WDS) ||
 337                 (type1 == IEEE80211_IF_TYPE_WDS &&
 338                  (type2 == IEEE80211_IF_TYPE_WDS ||
 339                   type2 == IEEE80211_IF_TYPE_AP)) ||
 340                 (type1 == IEEE80211_IF_TYPE_AP &&
 341                  type2 == IEEE80211_IF_TYPE_VLAN) ||
 342                 (type1 == IEEE80211_IF_TYPE_VLAN &&
 343                  (type2 == IEEE80211_IF_TYPE_AP ||
 344                   type2 == IEEE80211_IF_TYPE_VLAN)));
 345 }
 346
 347 /* Check if running monitor interfaces should go to a "soft monitor" mode
 348  * and switch them if necessary. */
 349 static inline void ieee80211_start_soft_monitor(struct ieee80211_local *local)
 350 {
 351         struct ieee80211_if_init_conf conf;
 352
 353         if (local->open_count && local->open_count == local->monitors &&
 354             !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER) &&
 355             local->ops->remove_interface) {
 356                 conf.if_id = -1;
 357                 conf.type = IEEE80211_IF_TYPE_MNTR;
 358                 conf.mac_addr = NULL;
 359                 local->ops->remove_interface(local_to_hw(local), &conf);
 360         }
 361 }
 362
 363 /* Check if running monitor interfaces should go to a "hard monitor" mode
 364  * and switch them if necessary. */
 365 static void ieee80211_start_hard_monitor(struct ieee80211_local *local)
 366 {
 367         struct ieee80211_if_init_conf conf;
 368
 369         if (local->open_count && local->open_count == local->monitors &&
 370             !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
 371                 conf.if_id = -1;
 372                 conf.type = IEEE80211_IF_TYPE_MNTR;
 373                 conf.mac_addr = NULL;
 374                 local->ops->add_interface(local_to_hw(local), &conf);
 375         }
 376 }
 377
 378 static void ieee80211_if_open(struct net_device *dev)
 379 {
 380         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 381
 382         switch (sdata->type) {
 383         case IEEE80211_IF_TYPE_STA:
 384         case IEEE80211_IF_TYPE_IBSS:
 385                 sdata->u.sta.prev_bssid_set = 0;
 386                 break;
 387         }
 388 }
 389
 390 static int ieee80211_open(struct net_device *dev)
 391 {
 392         struct ieee80211_sub_if_data *sdata, *nsdata;
 393         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 394         struct ieee80211_if_init_conf conf;
 395         int res;
 396
 397         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 398         read_lock(&local->sub_if_lock);
 399         list_for_each_entry(nsdata, &local->sub_if_list, list) {
 400                 struct net_device *ndev = nsdata->dev;
 401
 402                 if (ndev != dev && ndev != local->mdev && netif_running(ndev) &&
 403                     compare_ether_addr(dev->dev_addr, ndev->dev_addr) == 0 &&
 404                     !identical_mac_addr_allowed(sdata->type, nsdata->type)) {
 405                         read_unlock(&local->sub_if_lock);
 406                         return -ENOTUNIQ;
 407                 }
 408         }
 409         read_unlock(&local->sub_if_lock);
 410
 411         if (sdata->type == IEEE80211_IF_TYPE_WDS &&
 412             is_zero_ether_addr(sdata->u.wds.remote_addr))
 413                 return -ENOLINK;
 414
 415         if (sdata->type == IEEE80211_IF_TYPE_MNTR && local->open_count &&
 416             !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
 417                 /* run the interface in a "soft monitor" mode */
 418                 local->monitors++;
 419                 local->open_count++;
 420                 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
 421                 return 0;
 422         }
 423         ieee80211_if_open(dev);
 424         ieee80211_start_soft_monitor(local);
 425
 426         conf.if_id = dev->ifindex;
 427         conf.type = sdata->type;
 428         if (sdata->type == IEEE80211_IF_TYPE_MNTR)
 429                 conf.mac_addr = NULL;
 430         else
 431                 conf.mac_addr = dev->dev_addr;
 432         res = local->ops->add_interface(local_to_hw(local), &conf);
 433         if (res) {
 434                 if (sdata->type == IEEE80211_IF_TYPE_MNTR)
 435                         ieee80211_start_hard_monitor(local);
 436                 return res;
 437         }
 438
 439         if (local->open_count == 0) {
 440                 res = 0;
 441                 tasklet_enable(&local->tx_pending_tasklet);
 442                 tasklet_enable(&local->tasklet);
 443                 if (local->ops->open)
 444                         res = local->ops->open(local_to_hw(local));
 445                 if (res == 0) {
 446                         res = dev_open(local->mdev);
 447                         if (res) {
 448                                 if (local->ops->stop)
 449                                         local->ops->stop(local_to_hw(local));
 450                         } else {
 451                                 res = ieee80211_hw_config(local);
 452                                 if (res && local->ops->stop)
 453                                         local->ops->stop(local_to_hw(local));
 454                                 else if (!res && local->apdev)
 455                                         dev_open(local->apdev);
 456                         }
 457                 }
 458                 if (res) {
 459                         if (local->ops->remove_interface)
 460                                 local->ops->remove_interface(local_to_hw(local),
 461                                                             &conf);
 462                         return res;
 463                 }
 464         }
 465         local->open_count++;
 466
 467         if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
 468                 local->monitors++;
 469                 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
 470         } else {
 471                 ieee80211_if_config(dev);
 472                 ieee80211_reset_erp_info(dev);
 473         }
 474
 475         if (sdata->type == IEEE80211_IF_TYPE_STA &&
 476             !local->user_space_mlme)
 477                 netif_carrier_off(dev);
 478         else
 479                 netif_carrier_on(dev);
 480
 481         netif_start_queue(dev);
 482         return 0;
 483 }
 484
 485 static void ieee80211_if_shutdown(struct net_device *dev)
 486 {
 487         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 488         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 489
 490         ASSERT_RTNL();
 491         switch (sdata->type) {
 492         case IEEE80211_IF_TYPE_STA:
 493         case IEEE80211_IF_TYPE_IBSS:
 494                 sdata->u.sta.state = IEEE80211_DISABLED;
 495                 del_timer_sync(&sdata->u.sta.timer);
 496                 skb_queue_purge(&sdata->u.sta.skb_queue);
 497                 if (!local->ops->hw_scan &&
 498                     local->scan_dev == sdata->dev) {
 499                         local->sta_scanning = 0;
 500                         cancel_delayed_work(&local->scan_work);
 501                 }
 502                 flush_workqueue(local->hw.workqueue);
 503                 break;
 504         }
 505 }
 506
 507 static int ieee80211_stop(struct net_device *dev)
 508 {
 509         struct ieee80211_sub_if_data *sdata;
 510         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 511
 512         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 513
 514         if (sdata->type == IEEE80211_IF_TYPE_MNTR &&
 515             local->open_count > 1 &&
 516             !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
 517                 /* remove "soft monitor" interface */
 518                 local->open_count--;
 519                 local->monitors--;
 520                 if (!local->monitors)
 521                         local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
 522                 return 0;
 523         }
 524
 525         netif_stop_queue(dev);
 526         ieee80211_if_shutdown(dev);
 527
 528         if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
 529                 local->monitors--;
 530                 if (!local->monitors)
 531                         local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
 532         }
 533
 534         local->open_count--;
 535         if (local->open_count == 0) {
 536                 if (netif_running(local->mdev))
 537                         dev_close(local->mdev);
 538                 if (local->apdev)
 539                         dev_close(local->apdev);
 540                 if (local->ops->stop)
 541                         local->ops->stop(local_to_hw(local));
 542                 tasklet_disable(&local->tx_pending_tasklet);
 543                 tasklet_disable(&local->tasklet);
 544         }
 545         if (local->ops->remove_interface) {
 546                 struct ieee80211_if_init_conf conf;
 547
 548                 conf.if_id = dev->ifindex;
 549                 conf.type = sdata->type;
 550                 conf.mac_addr = dev->dev_addr;
 551                 local->ops->remove_interface(local_to_hw(local), &conf);
 552         }
 553
 554         ieee80211_start_hard_monitor(local);
 555
 556         return 0;
 557 }
 558
 559 enum netif_tx_lock_class {
 560         TX_LOCK_NORMAL,
 561         TX_LOCK_MASTER,
 562 };
 563
 564 static inline void netif_tx_lock_nested(struct net_device *dev, int subclass)
 565 {
 566         spin_lock_nested(&dev->_xmit_lock, subclass);
 567         dev->xmit_lock_owner = smp_processor_id();
 568 }
 569
 570 static void ieee80211_set_multicast_list(struct net_device *dev)
 571 {
 572         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 573         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 574         unsigned short flags;
 575
 576         netif_tx_lock_nested(local->mdev, TX_LOCK_MASTER);
 577         if (((dev->flags & IFF_ALLMULTI) != 0) ^ (sdata->allmulti != 0)) {
 578                 if (sdata->allmulti) {
 579                         sdata->allmulti = 0;
 580                         local->iff_allmultis--;
 581                 } else {
 582                         sdata->allmulti = 1;
 583                         local->iff_allmultis++;
 584                 }
 585         }
 586         if (((dev->flags & IFF_PROMISC) != 0) ^ (sdata->promisc != 0)) {
 587                 if (sdata->promisc) {
 588                         sdata->promisc = 0;
 589                         local->iff_promiscs--;
 590                 } else {
 591                         sdata->promisc = 1;
 592                         local->iff_promiscs++;
 593                 }
 594         }
 595         if (dev->mc_count != sdata->mc_count) {
 596                 local->mc_count = local->mc_count - sdata->mc_count +
 597                                   dev->mc_count;
 598                 sdata->mc_count = dev->mc_count;
 599         }
 600         if (local->ops->set_multicast_list) {
 601                 flags = local->mdev->flags;
 602                 if (local->iff_allmultis)
 603                         flags |= IFF_ALLMULTI;
 604                 if (local->iff_promiscs)
 605                         flags |= IFF_PROMISC;
 606                 read_lock(&local->sub_if_lock);
 607                 local->ops->set_multicast_list(local_to_hw(local), flags,
 608                                               local->mc_count);
 609                 read_unlock(&local->sub_if_lock);
 610         }
 611         netif_tx_unlock(local->mdev);
 612 }
 613
 614 /* Must not be called for mdev and apdev */
 615 void ieee80211_if_setup(struct net_device *dev)
 616 {
 617         ether_setup(dev);
 618         dev->hard_start_xmit = ieee80211_subif_start_xmit;
 619         dev->wireless_handlers = &ieee80211_iw_handler_def;
 620         dev->set_multicast_list = ieee80211_set_multicast_list;
 621         dev->change_mtu = ieee80211_change_mtu;
 622         dev->get_stats = ieee80211_get_stats;
 623         dev->open = ieee80211_open;
 624         dev->stop = ieee80211_stop;
 625         dev->uninit = ieee80211_if_reinit;
 626         dev->destructor = ieee80211_if_free;
 627 }
 628
 629 /* WDS specialties */
 630
 631 int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr)
 632 {
 633         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 634         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 635         struct sta_info *sta;
 636
 637         if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0)
 638                 return 0;
 639
 640         /* Create STA entry for the new peer */
 641         sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL);
 642         if (!sta)
 643                 return -ENOMEM;
 644         sta_info_put(sta);
 645
 646         /* Remove STA entry for the old peer */
 647         sta = sta_info_get(local, sdata->u.wds.remote_addr);
 648         if (sta) {
 649                 sta_info_free(sta);
 650                 sta_info_put(sta);
 651         } else {
 652                 printk(KERN_DEBUG "%s: could not find STA entry for WDS link "
 653                        "peer " MAC_FMT "\n",
 654                        dev->name, MAC_ARG(sdata->u.wds.remote_addr));
 655         }
 656
 657         /* Update WDS link data */
 658         memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN);
 659
 660         return 0;
 661 }
 662
 663 /* everything else */
 664
 665 static int __ieee80211_if_config(struct net_device *dev,
 666                                  struct sk_buff *beacon,
 667                                  struct ieee80211_tx_control *control)
 668 {
 669         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 670         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 671         struct ieee80211_if_conf conf;
 672         static u8 scan_bssid[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 673
 674         if (!local->ops->config_interface || !netif_running(dev))
 675                 return 0;
 676
 677         memset(&conf, 0, sizeof(conf));
 678         conf.type = sdata->type;
 679         if (sdata->type == IEEE80211_IF_TYPE_STA ||
 680             sdata->type == IEEE80211_IF_TYPE_IBSS) {
 681                 if (local->sta_scanning &&
 682                     local->scan_dev == dev)
 683                         conf.bssid = scan_bssid;
 684                 else
 685                         conf.bssid = sdata->u.sta.bssid;
 686                 conf.ssid = sdata->u.sta.ssid;
 687                 conf.ssid_len = sdata->u.sta.ssid_len;
 688                 conf.generic_elem = sdata->u.sta.extra_ie;
 689                 conf.generic_elem_len = sdata->u.sta.extra_ie_len;
 690         } else if (sdata->type == IEEE80211_IF_TYPE_AP) {
 691                 conf.ssid = sdata->u.ap.ssid;
 692                 conf.ssid_len = sdata->u.ap.ssid_len;
 693                 conf.generic_elem = sdata->u.ap.generic_elem;
 694                 conf.generic_elem_len = sdata->u.ap.generic_elem_len;
 695                 conf.beacon = beacon;
 696                 conf.beacon_control = control;
 697         }
 698         return local->ops->config_interface(local_to_hw(local),
 699                                            dev->ifindex, &conf);
 700 }
 701
 702 int ieee80211_if_config(struct net_device *dev)
 703 {
 704         return __ieee80211_if_config(dev, NULL, NULL);
 705 }
 706
 707 int ieee80211_if_config_beacon(struct net_device *dev)
 708 {
 709         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 710         struct ieee80211_tx_control control;
 711         struct sk_buff *skb;
 712
 713         if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
 714                 return 0;
 715         skb = ieee80211_beacon_get(local_to_hw(local), dev->ifindex, &control);
 716         if (!skb)
 717                 return -ENOMEM;
 718         return __ieee80211_if_config(dev, skb, &control);
 719 }
 720
 721 int ieee80211_hw_config(struct ieee80211_local *local)
 722 {
 723         struct ieee80211_hw_mode *mode;
 724         struct ieee80211_channel *chan;
 725         int ret = 0;
 726
 727         if (local->sta_scanning) {
 728                 chan = local->scan_channel;
 729                 mode = local->scan_hw_mode;
 730         } else {
 731                 chan = local->oper_channel;
 732                 mode = local->oper_hw_mode;
 733         }
 734
 735         local->hw.conf.channel = chan->chan;
 736         local->hw.conf.channel_val = chan->val;
 737         local->hw.conf.power_level = chan->power_level;
 738         local->hw.conf.freq = chan->freq;
 739         local->hw.conf.phymode = mode->mode;
 740         local->hw.conf.antenna_max = chan->antenna_max;
 741         local->hw.conf.chan = chan;
 742         local->hw.conf.mode = mode;
 743
 744 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 745         printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d "
 746                "phymode=%d\n", local->hw.conf.channel, local->hw.conf.freq,
 747                local->hw.conf.phymode);
 748 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
 749
 750         if (local->ops->config)
 751                 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
 752
 753         return ret;
 754 }
 755
 756 void ieee80211_erp_info_change_notify(struct net_device *dev, u8 changes)
 757 {
 758         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 759         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 760         if (local->ops->erp_ie_changed)
 761                 local->ops->erp_ie_changed(local_to_hw(local), changes,
 762                                            sdata->use_protection,
 763                                            !sdata->short_preamble);
 764 }
 765
 766 void ieee80211_reset_erp_info(struct net_device *dev)
 767 {
 768         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 769
 770         sdata->short_preamble = 0;
 771         sdata->use_protection = 0;
 772         ieee80211_erp_info_change_notify(dev,
 773                                          IEEE80211_ERP_CHANGE_PROTECTION |
 774                                          IEEE80211_ERP_CHANGE_PREAMBLE);
 775 }
 776
 777 struct dev_mc_list *ieee80211_get_mc_list_item(struct ieee80211_hw *hw,
 778                                                struct dev_mc_list *prev,
 779                                                void **ptr)
 780 {
 781         struct ieee80211_local *local = hw_to_local(hw);
 782         struct ieee80211_sub_if_data *sdata = *ptr;
 783         struct dev_mc_list *mc;
 784
 785         if (!prev) {
 786                 WARN_ON(sdata);
 787                 sdata = NULL;
 788         }
 789         if (!prev || !prev->next) {
 790                 if (sdata)
 791                         sdata = list_entry(sdata->list.next,
 792                                            struct ieee80211_sub_if_data, list);
 793                 else
 794                         sdata = list_entry(local->sub_if_list.next,
 795                                            struct ieee80211_sub_if_data, list);
 796                 if (&sdata->list != &local->sub_if_list)
 797                         mc = sdata->dev->mc_list;
 798                 else
 799                         mc = NULL;
 800         } else
 801                 mc = prev->next;
 802
 803         *ptr = sdata;
 804         return mc;
 805 }
 806 EXPORT_SYMBOL(ieee80211_get_mc_list_item);
 807
 808 static void ieee80211_stat_refresh(unsigned long data)
 809 {
 810         struct ieee80211_local *local = (struct ieee80211_local *) data;
 811         struct sta_info *sta;
 812         struct ieee80211_sub_if_data *sdata;
 813
 814         if (!local->stat_time)
 815                 return;
 816
 817         /* go through all stations */
 818         read_lock_bh(&local->sta_lock);
 819         list_for_each_entry(sta, &local->sta_list, list) {
 820                 sta->channel_use = (sta->channel_use_raw / local->stat_time) /
 821                         CHAN_UTIL_PER_10MS;
 822                 sta->channel_use_raw = 0;
 823         }
 824         read_unlock_bh(&local->sta_lock);
 825
 826         /* go through all subinterfaces */
 827         read_lock(&local->sub_if_lock);
 828         list_for_each_entry(sdata, &local->sub_if_list, list) {
 829                 sdata->channel_use = (sdata->channel_use_raw /
 830                                       local->stat_time) / CHAN_UTIL_PER_10MS;
 831                 sdata->channel_use_raw = 0;
 832         }
 833         read_unlock(&local->sub_if_lock);
 834
 835         /* hardware interface */
 836         local->channel_use = (local->channel_use_raw /
 837                               local->stat_time) / CHAN_UTIL_PER_10MS;
 838         local->channel_use_raw = 0;
 839
 840         local->stat_timer.expires = jiffies + HZ * local->stat_time / 100;
 841         add_timer(&local->stat_timer);
 842 }
 843
 844 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
 845                                  struct sk_buff *skb,
 846                                  struct ieee80211_tx_status *status)
 847 {
 848         struct ieee80211_local *local = hw_to_local(hw);
 849         struct ieee80211_tx_status *saved;
 850         int tmp;
 851
 852         skb->dev = local->mdev;
 853         saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC);
 854         if (unlikely(!saved)) {
 855                 if (net_ratelimit())
 856                         printk(KERN_WARNING "%s: Not enough memory, "
 857                                "dropping tx status", skb->dev->name);
 858                 /* should be dev_kfree_skb_irq, but due to this function being
 859                  * named _irqsafe instead of just _irq we can't be sure that
 860                  * people won't call it from non-irq contexts */
 861                 dev_kfree_skb_any(skb);
 862                 return;
 863         }
 864         memcpy(saved, status, sizeof(struct ieee80211_tx_status));
 865         /* copy pointer to saved status into skb->cb for use by tasklet */
 866         memcpy(skb->cb, &saved, sizeof(saved));
 867
 868         skb->pkt_type = IEEE80211_TX_STATUS_MSG;
 869         skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ?
 870                        &local->skb_queue : &local->skb_queue_unreliable, skb);
 871         tmp = skb_queue_len(&local->skb_queue) +
 872                 skb_queue_len(&local->skb_queue_unreliable);
 873         while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
 874                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 875                 memcpy(&saved, skb->cb, sizeof(saved));
 876                 kfree(saved);
 877                 dev_kfree_skb_irq(skb);
 878                 tmp--;
 879                 I802_DEBUG_INC(local->tx_status_drop);
 880         }
 881         tasklet_schedule(&local->tasklet);
 882 }
 883 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
 884
 885 static void ieee80211_tasklet_handler(unsigned long data)
 886 {
 887         struct ieee80211_local *local = (struct ieee80211_local *) data;
 888         struct sk_buff *skb;
 889         struct ieee80211_rx_status rx_status;
 890         struct ieee80211_tx_status *tx_status;
 891
 892         while ((skb = skb_dequeue(&local->skb_queue)) ||
 893                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 894                 switch (skb->pkt_type) {
 895                 case IEEE80211_RX_MSG:
 896                         /* status is in skb->cb */
 897                         memcpy(&rx_status, skb->cb, sizeof(rx_status));
 898                         /* Clear skb->type in order to not confuse kernel
 899                          * netstack. */
 900                         skb->pkt_type = 0;
 901                         __ieee80211_rx(local_to_hw(local), skb, &rx_status);
 902                         break;
 903                 case IEEE80211_TX_STATUS_MSG:
 904                         /* get pointer to saved status out of skb->cb */
 905                         memcpy(&tx_status, skb->cb, sizeof(tx_status));
 906                         skb->pkt_type = 0;
 907                         ieee80211_tx_status(local_to_hw(local),
 908                                             skb, tx_status);
 909                         kfree(tx_status);
 910                         break;
 911                 default: /* should never get here! */
 912                         printk(KERN_ERR "%s: Unknown message type (%d)\n",
 913                                local->mdev->name, skb->pkt_type);
 914                         dev_kfree_skb(skb);
 915                         break;
 916                 }
 917         }
 918 }
 919
 920 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
 921  * make a prepared TX frame (one that has been given to hw) to look like brand
 922  * new IEEE 802.11 frame that is ready to go through TX processing again.
 923  * Also, tx_packet_data in cb is restored from tx_control. */
 924 static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
 925                                       struct ieee80211_key *key,
 926                                       struct sk_buff *skb,
 927                                       struct ieee80211_tx_control *control)
 928 {
 929         int hdrlen, iv_len, mic_len;
 930         struct ieee80211_tx_packet_data *pkt_data;
 931
 932         pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
 933         pkt_data->ifindex = control->ifindex;
 934         pkt_data->mgmt_iface = (control->type == IEEE80211_IF_TYPE_MGMT);
 935         pkt_data->req_tx_status = !!(control->flags & IEEE80211_TXCTL_REQ_TX_STATUS);
 936         pkt_data->do_not_encrypt = !!(control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT);
 937         pkt_data->requeue = !!(control->flags & IEEE80211_TXCTL_REQUEUE);
 938         pkt_data->queue = control->queue;
 939
 940         hdrlen = ieee80211_get_hdrlen_from_skb(skb);
 941
 942         if (!key)
 943                 goto no_key;
 944
 945         switch (key->alg) {
 946         case ALG_WEP:
 947                 iv_len = WEP_IV_LEN;
 948                 mic_len = WEP_ICV_LEN;
 949                 break;
 950         case ALG_TKIP:
 951                 iv_len = TKIP_IV_LEN;
 952                 mic_len = TKIP_ICV_LEN;
 953                 break;
 954         case ALG_CCMP:
 955                 iv_len = CCMP_HDR_LEN;
 956                 mic_len = CCMP_MIC_LEN;
 957                 break;
 958         default:
 959                 goto no_key;
 960         }
 961
 962         if (skb->len >= mic_len && key->force_sw_encrypt)
 963                 skb_trim(skb, skb->len - mic_len);
 964         if (skb->len >= iv_len && skb->len > hdrlen) {
 965                 memmove(skb->data + iv_len, skb->data, hdrlen);
 966                 skb_pull(skb, iv_len);
 967         }
 968
 969 no_key:
 970         {
 971                 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 972                 u16 fc = le16_to_cpu(hdr->frame_control);
 973                 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
 974                         fc &= ~IEEE80211_STYPE_QOS_DATA;
 975                         hdr->frame_control = cpu_to_le16(fc);
 976                         memmove(skb->data + 2, skb->data, hdrlen - 2);
 977                         skb_pull(skb, 2);
 978                 }
 979         }
 980 }
 981
 982 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
 983                          struct ieee80211_tx_status *status)
 984 {
 985         struct sk_buff *skb2;
 986         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 987         struct ieee80211_local *local = hw_to_local(hw);
 988         u16 frag, type;
 989         u32 msg_type;
 990         struct ieee80211_tx_status_rtap_hdr *rthdr;
 991         struct ieee80211_sub_if_data *sdata;
 992         int monitors;
 993
 994         if (!status) {
 995                 printk(KERN_ERR
 996                        "%s: ieee80211_tx_status called with NULL status\n",
 997                        local->mdev->name);
 998                 dev_kfree_skb(skb);
 999                 return;
1000         }
1001
1002         if (status->excessive_retries) {
1003                 struct sta_info *sta;
1004                 sta = sta_info_get(local, hdr->addr1);
1005                 if (sta) {
1006                         if (sta->flags & WLAN_STA_PS) {
1007                                 /* The STA is in power save mode, so assume
1008                                  * that this TX packet failed because of that.
1009                                  */
1010                                 status->excessive_retries = 0;
1011                                 status->flags |= IEEE80211_TX_STATUS_TX_FILTERED;
1012                         }
1013                         sta_info_put(sta);
1014                 }
1015         }
1016
1017         if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
1018                 struct sta_info *sta;
1019                 sta = sta_info_get(local, hdr->addr1);
1020                 if (sta) {
1021                         sta->tx_filtered_count++;
1022
1023                         /* Clear the TX filter mask for this STA when sending
1024                          * the next packet. If the STA went to power save mode,
1025                          * this will happen when it is waking up for the next
1026                          * time. */
1027                         sta->clear_dst_mask = 1;
1028
1029                         /* TODO: Is the WLAN_STA_PS flag always set here or is
1030                          * the race between RX and TX status causing some
1031                          * packets to be filtered out before 80211.o gets an
1032                          * update for PS status? This seems to be the case, so
1033                          * no changes are likely to be needed. */
1034                         if (sta->flags & WLAN_STA_PS &&
1035                             skb_queue_len(&sta->tx_filtered) <
1036                             STA_MAX_TX_BUFFER) {
1037                                 ieee80211_remove_tx_extra(local, sta->key,
1038                                                           skb,
1039                                                           &status->control);
1040                                 skb_queue_tail(&sta->tx_filtered, skb);
1041                         } else if (!(sta->flags & WLAN_STA_PS) &&
1042                                    !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) {
1043                                 /* Software retry the packet once */
1044                                 status->control.flags |= IEEE80211_TXCTL_REQUEUE;
1045                                 ieee80211_remove_tx_extra(local, sta->key,
1046                                                           skb,
1047                                                           &status->control);
1048                                 dev_queue_xmit(skb);
1049                         } else {
1050                                 if (net_ratelimit()) {
1051                                         printk(KERN_DEBUG "%s: dropped TX "
1052                                                "filtered frame queue_len=%d "
1053                                                "PS=%d @%lu\n",
1054                                                local->mdev->name,
1055                                                skb_queue_len(
1056                                                        &sta->tx_filtered),
1057                                                !!(sta->flags & WLAN_STA_PS),
1058                                                jiffies);
1059                                 }
1060                                 dev_kfree_skb(skb);
1061                         }
1062                         sta_info_put(sta);
1063                         return;
1064                 }
1065         } else {
1066                 /* FIXME: STUPID to call this with both local and local->mdev */
1067                 rate_control_tx_status(local, local->mdev, skb, status);
1068         }
1069
1070         ieee80211_led_tx(local, 0);
1071
1072         /* SNMP counters
1073          * Fragments are passed to low-level drivers as separate skbs, so these
1074          * are actually fragments, not frames. Update frame counters only for
1075          * the first fragment of the frame. */
1076
1077         frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
1078         type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
1079
1080         if (status->flags & IEEE80211_TX_STATUS_ACK) {
1081                 if (frag == 0) {
1082                         local->dot11TransmittedFrameCount++;
1083                         if (is_multicast_ether_addr(hdr->addr1))
1084                                 local->dot11MulticastTransmittedFrameCount++;
1085                         if (status->retry_count > 0)
1086                                 local->dot11RetryCount++;
1087                         if (status->retry_count > 1)
1088                                 local->dot11MultipleRetryCount++;
1089                 }
1090
1091                 /* This counter shall be incremented for an acknowledged MPDU
1092                  * with an individual address in the address 1 field or an MPDU
1093                  * with a multicast address in the address 1 field of type Data
1094                  * or Management. */
1095                 if (!is_multicast_ether_addr(hdr->addr1) ||
1096                     type == IEEE80211_FTYPE_DATA ||
1097                     type == IEEE80211_FTYPE_MGMT)
1098                         local->dot11TransmittedFragmentCount++;
1099         } else {
1100                 if (frag == 0)
1101                         local->dot11FailedCount++;
1102         }
1103
1104         msg_type = (status->flags & IEEE80211_TX_STATUS_ACK) ?
1105                 ieee80211_msg_tx_callback_ack : ieee80211_msg_tx_callback_fail;
1106
1107         /* this was a transmitted frame, but now we want to reuse it */
1108         skb_orphan(skb);
1109
1110         if ((status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS) &&
1111             local->apdev) {
1112                 if (local->monitors) {
1113                         skb2 = skb_clone(skb, GFP_ATOMIC);
1114                 } else {
1115                         skb2 = skb;
1116                         skb = NULL;
1117                 }
1118
1119                 if (skb2)
1120                         /* Send frame to hostapd */
1121                         ieee80211_rx_mgmt(local, skb2, NULL, msg_type);
1122
1123                 if (!skb)
1124                         return;
1125         }
1126
1127         if (!local->monitors) {
1128                 dev_kfree_skb(skb);
1129                 return;
1130         }
1131
1132         /* send frame to monitor interfaces now */
1133
1134         if (skb_headroom(skb) < sizeof(*rthdr)) {
1135                 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
1136                 dev_kfree_skb(skb);
1137                 return;
1138         }
1139
1140         rthdr = (struct ieee80211_tx_status_rtap_hdr*)
1141                                 skb_push(skb, sizeof(*rthdr));
1142
1143         memset(rthdr, 0, sizeof(*rthdr));
1144         rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
1145         rthdr->hdr.it_present =
1146                 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
1147                             (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
1148
1149         if (!(status->flags & IEEE80211_TX_STATUS_ACK) &&
1150             !is_multicast_ether_addr(hdr->addr1))
1151                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
1152
1153         if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) &&
1154             (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT))
1155                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
1156         else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS)
1157                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
1158
1159         rthdr->data_retries = status->retry_count;
1160
1161         read_lock(&local->sub_if_lock);
1162         monitors = local->monitors;
1163         list_for_each_entry(sdata, &local->sub_if_list, list) {
1164                 /*
1165                  * Using the monitors counter is possibly racy, but
1166                  * if the value is wrong we simply either clone the skb
1167                  * once too much or forget sending it to one monitor iface
1168                  * The latter case isn't nice but fixing the race is much
1169                  * more complicated.
1170                  */
1171                 if (!monitors || !skb)
1172                         goto out;
1173
1174                 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
1175                         if (!netif_running(sdata->dev))
1176                                 continue;
1177                         monitors--;
1178                         if (monitors)
1179                                 skb2 = skb_clone(skb, GFP_KERNEL);
1180                         else
1181                                 skb2 = NULL;
1182                         skb->dev = sdata->dev;
1183                         /* XXX: is this sufficient for BPF? */
1184                         skb_set_mac_header(skb, 0);
1185                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1186                         skb->pkt_type = PACKET_OTHERHOST;
1187                         skb->protocol = htons(ETH_P_802_2);
1188                         memset(skb->cb, 0, sizeof(skb->cb));
1189                         netif_rx(skb);
1190                         skb = skb2;
1191                 }
1192         }
1193  out:
1194         read_unlock(&local->sub_if_lock);
1195         if (skb)
1196                 dev_kfree_skb(skb);
1197 }
1198 EXPORT_SYMBOL(ieee80211_tx_status);
1199
1200 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
1201                                         const struct ieee80211_ops *ops)
1202 {
1203         struct net_device *mdev;
1204         struct ieee80211_local *local;
1205         struct ieee80211_sub_if_data *sdata;
1206         int priv_size;
1207         struct wiphy *wiphy;
1208
1209         /* Ensure 32-byte alignment of our private data and hw private data.
1210          * We use the wiphy priv data for both our ieee80211_local and for
1211          * the driver's private data
1212          *
1213          * In memory it'll be like this:
1214          *
1215          * +-------------------------+
1216          * | struct wiphy           |
1217          * +-------------------------+
1218          * | struct ieee80211_local  |
1219          * +-------------------------+
1220          * | driver's private data   |
1221          * +-------------------------+
1222          *
1223          */
1224         priv_size = ((sizeof(struct ieee80211_local) +
1225                       NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1226                     priv_data_len;
1227
1228         wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1229
1230         if (!wiphy)
1231                 return NULL;
1232
1233         wiphy->privid = mac80211_wiphy_privid;
1234
1235         local = wiphy_priv(wiphy);
1236         local->hw.wiphy = wiphy;
1237
1238         local->hw.priv = (char *)local +
1239                          ((sizeof(struct ieee80211_local) +
1240                            NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1241
1242         BUG_ON(!ops->tx);
1243         BUG_ON(!ops->config);
1244         BUG_ON(!ops->add_interface);
1245         local->ops = ops;
1246
1247         /* for now, mdev needs sub_if_data :/ */
1248         mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
1249                             "wmaster%d", ether_setup);
1250         if (!mdev) {
1251                 wiphy_free(wiphy);
1252                 return NULL;
1253         }
1254
1255         sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
1256         mdev->ieee80211_ptr = &sdata->wdev;
1257         sdata->wdev.wiphy = wiphy;
1258
1259         local->hw.queues = 1; /* default */
1260
1261         local->mdev = mdev;
1262         local->rx_pre_handlers = ieee80211_rx_pre_handlers;
1263         local->rx_handlers = ieee80211_rx_handlers;
1264         local->tx_handlers = ieee80211_tx_handlers;
1265
1266         local->bridge_packets = 1;
1267
1268         local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1269         local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1270         local->short_retry_limit = 7;
1271         local->long_retry_limit = 4;
1272         local->hw.conf.radio_enabled = 1;
1273
1274         local->enabled_modes = (unsigned int) -1;
1275
1276         INIT_LIST_HEAD(&local->modes_list);
1277
1278         rwlock_init(&local->sub_if_lock);
1279         INIT_LIST_HEAD(&local->sub_if_list);
1280
1281         INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
1282         init_timer(&local->stat_timer);
1283         local->stat_timer.function = ieee80211_stat_refresh;
1284         local->stat_timer.data = (unsigned long) local;
1285         ieee80211_rx_bss_list_init(mdev);
1286
1287         sta_info_init(local);
1288
1289         mdev->hard_start_xmit = ieee80211_master_start_xmit;
1290         mdev->open = ieee80211_master_open;
1291         mdev->stop = ieee80211_master_stop;
1292         mdev->type = ARPHRD_IEEE80211;
1293         mdev->hard_header_parse = header_parse_80211;
1294
1295         sdata->type = IEEE80211_IF_TYPE_AP;
1296         sdata->dev = mdev;
1297         sdata->local = local;
1298         sdata->u.ap.force_unicast_rateidx = -1;
1299         sdata->u.ap.max_ratectrl_rateidx = -1;
1300         ieee80211_if_sdata_init(sdata);
1301         list_add_tail(&sdata->list, &local->sub_if_list);
1302
1303         tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1304                      (unsigned long)local);
1305         tasklet_disable(&local->tx_pending_tasklet);
1306
1307         tasklet_init(&local->tasklet,
1308                      ieee80211_tasklet_handler,
1309                      (unsigned long) local);
1310         tasklet_disable(&local->tasklet);
1311
1312         skb_queue_head_init(&local->skb_queue);
1313         skb_queue_head_init(&local->skb_queue_unreliable);
1314
1315         return local_to_hw(local);
1316 }
1317 EXPORT_SYMBOL(ieee80211_alloc_hw);
1318
1319 int ieee80211_register_hw(struct ieee80211_hw *hw)
1320 {
1321         struct ieee80211_local *local = hw_to_local(hw);
1322         const char *name;
1323         int result;
1324
1325         result = wiphy_register(local->hw.wiphy);
1326         if (result < 0)
1327                 return result;
1328
1329         name = wiphy_dev(local->hw.wiphy)->driver->name;
1330         local->hw.workqueue = create_singlethread_workqueue(name);
1331         if (!local->hw.workqueue) {
1332                 result = -ENOMEM;
1333                 goto fail_workqueue;
1334         }
1335
1336         /*
1337          * The hardware needs headroom for sending the frame,
1338          * and we need some headroom for passing the frame to monitor
1339          * interfaces, but never both at the same time.
1340          */
1341         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1342                                    sizeof(struct ieee80211_tx_status_rtap_hdr));
1343
1344         debugfs_hw_add(local);
1345
1346         local->hw.conf.beacon_int = 1000;
1347
1348         local->wstats_flags |= local->hw.max_rssi ?
1349                                IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID;
1350         local->wstats_flags |= local->hw.max_signal ?
1351                                IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1352         local->wstats_flags |= local->hw.max_noise ?
1353                                IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1354         if (local->hw.max_rssi < 0 || local->hw.max_noise < 0)
1355                 local->wstats_flags |= IW_QUAL_DBM;
1356
1357         result = sta_info_start(local);
1358         if (result < 0)
1359                 goto fail_sta_info;
1360
1361         rtnl_lock();
1362         result = dev_alloc_name(local->mdev, local->mdev->name);
1363         if (result < 0)
1364                 goto fail_dev;
1365
1366         memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1367         SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1368
1369         result = register_netdevice(local->mdev);
1370         if (result < 0)
1371                 goto fail_dev;
1372
1373         ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1374
1375         result = ieee80211_init_rate_ctrl_alg(local, NULL);
1376         if (result < 0) {
1377                 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1378                        "algorithm\n", local->mdev->name);
1379                 goto fail_rate;
1380         }
1381
1382         result = ieee80211_wep_init(local);
1383
1384         if (result < 0) {
1385                 printk(KERN_DEBUG "%s: Failed to initialize wep\n",
1386                        local->mdev->name);
1387                 goto fail_wep;
1388         }
1389
1390         ieee80211_install_qdisc(local->mdev);
1391
1392         /* add one default STA interface */
1393         result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
1394                                   IEEE80211_IF_TYPE_STA);
1395         if (result)
1396                 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1397                        local->mdev->name);
1398
1399         local->reg_state = IEEE80211_DEV_REGISTERED;
1400         rtnl_unlock();
1401
1402         ieee80211_led_init(local);
1403
1404         return 0;
1405
1406 fail_wep:
1407         rate_control_deinitialize(local);
1408 fail_rate:
1409         ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1410         unregister_netdevice(local->mdev);
1411 fail_dev:
1412         rtnl_unlock();
1413         sta_info_stop(local);
1414 fail_sta_info:
1415         debugfs_hw_del(local);
1416         destroy_workqueue(local->hw.workqueue);
1417 fail_workqueue:
1418         wiphy_unregister(local->hw.wiphy);
1419         return result;
1420 }
1421 EXPORT_SYMBOL(ieee80211_register_hw);
1422
1423 int ieee80211_register_hwmode(struct ieee80211_hw *hw,
1424                               struct ieee80211_hw_mode *mode)
1425 {
1426         struct ieee80211_local *local = hw_to_local(hw);
1427         struct ieee80211_rate *rate;
1428         int i;
1429
1430         INIT_LIST_HEAD(&mode->list);
1431         list_add_tail(&mode->list, &local->modes_list);
1432
1433         local->hw_modes |= (1 << mode->mode);
1434         for (i = 0; i < mode->num_rates; i++) {
1435                 rate = &(mode->rates[i]);
1436                 rate->rate_inv = CHAN_UTIL_RATE_LCM / rate->rate;
1437         }
1438         ieee80211_prepare_rates(local, mode);
1439
1440         if (!local->oper_hw_mode) {
1441                 /* Default to this mode */
1442                 local->hw.conf.phymode = mode->mode;
1443                 local->oper_hw_mode = local->scan_hw_mode = mode;
1444                 local->oper_channel = local->scan_channel = &mode->channels[0];
1445                 local->hw.conf.mode = local->oper_hw_mode;
1446                 local->hw.conf.chan = local->oper_channel;
1447         }
1448
1449         if (!(hw->flags & IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED))
1450                 ieee80211_set_default_regdomain(mode);
1451
1452         return 0;
1453 }
1454 EXPORT_SYMBOL(ieee80211_register_hwmode);
1455
1456 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1457 {
1458         struct ieee80211_local *local = hw_to_local(hw);
1459         struct ieee80211_sub_if_data *sdata, *tmp;
1460         struct list_head tmp_list;
1461         int i;
1462
1463         tasklet_kill(&local->tx_pending_tasklet);
1464         tasklet_kill(&local->tasklet);
1465
1466         rtnl_lock();
1467
1468         BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
1469
1470         local->reg_state = IEEE80211_DEV_UNREGISTERED;
1471         if (local->apdev)
1472                 ieee80211_if_del_mgmt(local);
1473
1474         write_lock_bh(&local->sub_if_lock);
1475         list_replace_init(&local->sub_if_list, &tmp_list);
1476         write_unlock_bh(&local->sub_if_lock);
1477
1478         list_for_each_entry_safe(sdata, tmp, &tmp_list, list)
1479                 __ieee80211_if_del(local, sdata);
1480
1481         rtnl_unlock();
1482
1483         if (local->stat_time)
1484                 del_timer_sync(&local->stat_timer);
1485
1486         ieee80211_rx_bss_list_deinit(local->mdev);
1487         ieee80211_clear_tx_pending(local);
1488         sta_info_stop(local);
1489         rate_control_deinitialize(local);
1490         debugfs_hw_del(local);
1491
1492         for (i = 0; i < NUM_IEEE80211_MODES; i++) {
1493                 kfree(local->supp_rates[i]);
1494                 kfree(local->basic_rates[i]);
1495         }
1496
1497         if (skb_queue_len(&local->skb_queue)
1498                         || skb_queue_len(&local->skb_queue_unreliable))
1499                 printk(KERN_WARNING "%s: skb_queue not empty\n",
1500                        local->mdev->name);
1501         skb_queue_purge(&local->skb_queue);
1502         skb_queue_purge(&local->skb_queue_unreliable);
1503
1504         destroy_workqueue(local->hw.workqueue);
1505         wiphy_unregister(local->hw.wiphy);
1506         ieee80211_wep_free(local);
1507         ieee80211_led_exit(local);
1508 }
1509 EXPORT_SYMBOL(ieee80211_unregister_hw);
1510
1511 void ieee80211_free_hw(struct ieee80211_hw *hw)
1512 {
1513         struct ieee80211_local *local = hw_to_local(hw);
1514
1515         ieee80211_if_free(local->mdev);
1516         wiphy_free(local->hw.wiphy);
1517 }
1518 EXPORT_SYMBOL(ieee80211_free_hw);
1519
1520 struct net_device_stats *ieee80211_dev_stats(struct net_device *dev)
1521 {
1522         struct ieee80211_sub_if_data *sdata;
1523         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1524         return &sdata->stats;
1525 }
1526
1527 static int __init ieee80211_init(void)
1528 {
1529         struct sk_buff *skb;
1530         int ret;
1531
1532         BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb));
1533
1534         ret = ieee80211_wme_register();
1535         if (ret) {
1536                 printk(KERN_DEBUG "ieee80211_init: failed to "
1537                        "initialize WME (err=%d)\n", ret);
1538                 return ret;
1539         }
1540
1541         ieee80211_debugfs_netdev_init();
1542         ieee80211_regdomain_init();
1543
1544         return 0;
1545 }
1546
1547 static void __exit ieee80211_exit(void)
1548 {
1549         ieee80211_wme_unregister();
1550         ieee80211_debugfs_netdev_exit();
1551 }
1552
1553
1554 subsys_initcall(ieee80211_init);
1555 module_exit(ieee80211_exit);
1556
1557 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1558 MODULE_LICENSE("GPL");