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         conf.mac_addr = dev->dev_addr;
 429         res = local->ops->add_interface(local_to_hw(local), &conf);
 430         if (res) {
 431                 if (sdata->type == IEEE80211_IF_TYPE_MNTR)
 432                         ieee80211_start_hard_monitor(local);
 433                 return res;
 434         }
 435
 436         if (local->open_count == 0) {
 437                 res = 0;
 438                 tasklet_enable(&local->tx_pending_tasklet);
 439                 tasklet_enable(&local->tasklet);
 440                 if (local->ops->open)
 441                         res = local->ops->open(local_to_hw(local));
 442                 if (res == 0) {
 443                         res = dev_open(local->mdev);
 444                         if (res) {
 445                                 if (local->ops->stop)
 446                                         local->ops->stop(local_to_hw(local));
 447                         } else {
 448                                 res = ieee80211_hw_config(local);
 449                                 if (res && local->ops->stop)
 450                                         local->ops->stop(local_to_hw(local));
 451                                 else if (!res && local->apdev)
 452                                         dev_open(local->apdev);
 453                         }
 454                 }
 455                 if (res) {
 456                         if (local->ops->remove_interface)
 457                                 local->ops->remove_interface(local_to_hw(local),
 458                                                             &conf);
 459                         return res;
 460                 }
 461         }
 462         local->open_count++;
 463
 464         if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
 465                 local->monitors++;
 466                 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
 467         } else
 468                 ieee80211_if_config(dev);
 469
 470         if (sdata->type == IEEE80211_IF_TYPE_STA &&
 471             !local->user_space_mlme)
 472                 netif_carrier_off(dev);
 473         else
 474                 netif_carrier_on(dev);
 475
 476         netif_start_queue(dev);
 477         return 0;
 478 }
 479
 480 static void ieee80211_if_shutdown(struct net_device *dev)
 481 {
 482         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 483         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 484
 485         ASSERT_RTNL();
 486         switch (sdata->type) {
 487         case IEEE80211_IF_TYPE_STA:
 488         case IEEE80211_IF_TYPE_IBSS:
 489                 sdata->u.sta.state = IEEE80211_DISABLED;
 490                 del_timer_sync(&sdata->u.sta.timer);
 491                 skb_queue_purge(&sdata->u.sta.skb_queue);
 492                 if (!local->ops->hw_scan &&
 493                     local->scan_dev == sdata->dev) {
 494                         local->sta_scanning = 0;
 495                         cancel_delayed_work(&local->scan_work);
 496                 }
 497                 flush_workqueue(local->hw.workqueue);
 498                 break;
 499         }
 500 }
 501
 502 static int ieee80211_stop(struct net_device *dev)
 503 {
 504         struct ieee80211_sub_if_data *sdata;
 505         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 506
 507         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 508
 509         if (sdata->type == IEEE80211_IF_TYPE_MNTR &&
 510             local->open_count > 1 &&
 511             !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
 512                 /* remove "soft monitor" interface */
 513                 local->open_count--;
 514                 local->monitors--;
 515                 if (!local->monitors)
 516                         local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
 517                 return 0;
 518         }
 519
 520         netif_stop_queue(dev);
 521         ieee80211_if_shutdown(dev);
 522
 523         if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
 524                 local->monitors--;
 525                 if (!local->monitors)
 526                         local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
 527         }
 528
 529         local->open_count--;
 530         if (local->open_count == 0) {
 531                 if (netif_running(local->mdev))
 532                         dev_close(local->mdev);
 533                 if (local->apdev)
 534                         dev_close(local->apdev);
 535                 if (local->ops->stop)
 536                         local->ops->stop(local_to_hw(local));
 537                 tasklet_disable(&local->tx_pending_tasklet);
 538                 tasklet_disable(&local->tasklet);
 539         }
 540         if (local->ops->remove_interface) {
 541                 struct ieee80211_if_init_conf conf;
 542
 543                 conf.if_id = dev->ifindex;
 544                 conf.type = sdata->type;
 545                 conf.mac_addr = dev->dev_addr;
 546                 local->ops->remove_interface(local_to_hw(local), &conf);
 547         }
 548
 549         ieee80211_start_hard_monitor(local);
 550
 551         return 0;
 552 }
 553
 554 enum netif_tx_lock_class {
 555         TX_LOCK_NORMAL,
 556         TX_LOCK_MASTER,
 557 };
 558
 559 static inline void netif_tx_lock_nested(struct net_device *dev, int subclass)
 560 {
 561         spin_lock_nested(&dev->_xmit_lock, subclass);
 562         dev->xmit_lock_owner = smp_processor_id();
 563 }
 564
 565 static void ieee80211_set_multicast_list(struct net_device *dev)
 566 {
 567         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 568         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 569         unsigned short flags;
 570
 571         netif_tx_lock_nested(local->mdev, TX_LOCK_MASTER);
 572         if (((dev->flags & IFF_ALLMULTI) != 0) ^ (sdata->allmulti != 0)) {
 573                 if (sdata->allmulti) {
 574                         sdata->allmulti = 0;
 575                         local->iff_allmultis--;
 576                 } else {
 577                         sdata->allmulti = 1;
 578                         local->iff_allmultis++;
 579                 }
 580         }
 581         if (((dev->flags & IFF_PROMISC) != 0) ^ (sdata->promisc != 0)) {
 582                 if (sdata->promisc) {
 583                         sdata->promisc = 0;
 584                         local->iff_promiscs--;
 585                 } else {
 586                         sdata->promisc = 1;
 587                         local->iff_promiscs++;
 588                 }
 589         }
 590         if (dev->mc_count != sdata->mc_count) {
 591                 local->mc_count = local->mc_count - sdata->mc_count +
 592                                   dev->mc_count;
 593                 sdata->mc_count = dev->mc_count;
 594         }
 595         if (local->ops->set_multicast_list) {
 596                 flags = local->mdev->flags;
 597                 if (local->iff_allmultis)
 598                         flags |= IFF_ALLMULTI;
 599                 if (local->iff_promiscs)
 600                         flags |= IFF_PROMISC;
 601                 read_lock(&local->sub_if_lock);
 602                 local->ops->set_multicast_list(local_to_hw(local), flags,
 603                                               local->mc_count);
 604                 read_unlock(&local->sub_if_lock);
 605         }
 606         netif_tx_unlock(local->mdev);
 607 }
 608
 609 /* Must not be called for mdev and apdev */
 610 void ieee80211_if_setup(struct net_device *dev)
 611 {
 612         ether_setup(dev);
 613         dev->hard_start_xmit = ieee80211_subif_start_xmit;
 614         dev->wireless_handlers = &ieee80211_iw_handler_def;
 615         dev->set_multicast_list = ieee80211_set_multicast_list;
 616         dev->change_mtu = ieee80211_change_mtu;
 617         dev->get_stats = ieee80211_get_stats;
 618         dev->open = ieee80211_open;
 619         dev->stop = ieee80211_stop;
 620         dev->uninit = ieee80211_if_reinit;
 621         dev->destructor = ieee80211_if_free;
 622 }
 623
 624 /* WDS specialties */
 625
 626 int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr)
 627 {
 628         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 629         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 630         struct sta_info *sta;
 631
 632         if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0)
 633                 return 0;
 634
 635         /* Create STA entry for the new peer */
 636         sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL);
 637         if (!sta)
 638                 return -ENOMEM;
 639         sta_info_put(sta);
 640
 641         /* Remove STA entry for the old peer */
 642         sta = sta_info_get(local, sdata->u.wds.remote_addr);
 643         if (sta) {
 644                 sta_info_free(sta);
 645                 sta_info_put(sta);
 646         } else {
 647                 printk(KERN_DEBUG "%s: could not find STA entry for WDS link "
 648                        "peer " MAC_FMT "\n",
 649                        dev->name, MAC_ARG(sdata->u.wds.remote_addr));
 650         }
 651
 652         /* Update WDS link data */
 653         memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN);
 654
 655         return 0;
 656 }
 657
 658 /* everything else */
 659
 660 static int __ieee80211_if_config(struct net_device *dev,
 661                                  struct sk_buff *beacon,
 662                                  struct ieee80211_tx_control *control)
 663 {
 664         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 665         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 666         struct ieee80211_if_conf conf;
 667         static u8 scan_bssid[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 668
 669         if (!local->ops->config_interface || !netif_running(dev))
 670                 return 0;
 671
 672         memset(&conf, 0, sizeof(conf));
 673         conf.type = sdata->type;
 674         if (sdata->type == IEEE80211_IF_TYPE_STA ||
 675             sdata->type == IEEE80211_IF_TYPE_IBSS) {
 676                 if (local->sta_scanning &&
 677                     local->scan_dev == dev)
 678                         conf.bssid = scan_bssid;
 679                 else
 680                         conf.bssid = sdata->u.sta.bssid;
 681                 conf.ssid = sdata->u.sta.ssid;
 682                 conf.ssid_len = sdata->u.sta.ssid_len;
 683                 conf.generic_elem = sdata->u.sta.extra_ie;
 684                 conf.generic_elem_len = sdata->u.sta.extra_ie_len;
 685         } else if (sdata->type == IEEE80211_IF_TYPE_AP) {
 686                 conf.ssid = sdata->u.ap.ssid;
 687                 conf.ssid_len = sdata->u.ap.ssid_len;
 688                 conf.generic_elem = sdata->u.ap.generic_elem;
 689                 conf.generic_elem_len = sdata->u.ap.generic_elem_len;
 690                 conf.beacon = beacon;
 691                 conf.beacon_control = control;
 692         }
 693         return local->ops->config_interface(local_to_hw(local),
 694                                            dev->ifindex, &conf);
 695 }
 696
 697 int ieee80211_if_config(struct net_device *dev)
 698 {
 699         return __ieee80211_if_config(dev, NULL, NULL);
 700 }
 701
 702 int ieee80211_if_config_beacon(struct net_device *dev)
 703 {
 704         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 705         struct ieee80211_tx_control control;
 706         struct sk_buff *skb;
 707
 708         if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
 709                 return 0;
 710         skb = ieee80211_beacon_get(local_to_hw(local), dev->ifindex, &control);
 711         if (!skb)
 712                 return -ENOMEM;
 713         return __ieee80211_if_config(dev, skb, &control);
 714 }
 715
 716 int ieee80211_hw_config(struct ieee80211_local *local)
 717 {
 718         struct ieee80211_hw_mode *mode;
 719         struct ieee80211_channel *chan;
 720         int ret = 0;
 721
 722         if (local->sta_scanning) {
 723                 chan = local->scan_channel;
 724                 mode = local->scan_hw_mode;
 725         } else {
 726                 chan = local->oper_channel;
 727                 mode = local->oper_hw_mode;
 728         }
 729
 730         local->hw.conf.channel = chan->chan;
 731         local->hw.conf.channel_val = chan->val;
 732         local->hw.conf.power_level = chan->power_level;
 733         local->hw.conf.freq = chan->freq;
 734         local->hw.conf.phymode = mode->mode;
 735         local->hw.conf.antenna_max = chan->antenna_max;
 736         local->hw.conf.chan = chan;
 737         local->hw.conf.mode = mode;
 738
 739 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 740         printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d "
 741                "phymode=%d\n", local->hw.conf.channel, local->hw.conf.freq,
 742                local->hw.conf.phymode);
 743 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
 744
 745         if (local->ops->config)
 746                 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
 747
 748         return ret;
 749 }
 750
 751 struct dev_mc_list *ieee80211_get_mc_list_item(struct ieee80211_hw *hw,
 752                                                struct dev_mc_list *prev,
 753                                                void **ptr)
 754 {
 755         struct ieee80211_local *local = hw_to_local(hw);
 756         struct ieee80211_sub_if_data *sdata = *ptr;
 757         struct dev_mc_list *mc;
 758
 759         if (!prev) {
 760                 WARN_ON(sdata);
 761                 sdata = NULL;
 762         }
 763         if (!prev || !prev->next) {
 764                 if (sdata)
 765                         sdata = list_entry(sdata->list.next,
 766                                            struct ieee80211_sub_if_data, list);
 767                 else
 768                         sdata = list_entry(local->sub_if_list.next,
 769                                            struct ieee80211_sub_if_data, list);
 770                 if (&sdata->list != &local->sub_if_list)
 771                         mc = sdata->dev->mc_list;
 772                 else
 773                         mc = NULL;
 774         } else
 775                 mc = prev->next;
 776
 777         *ptr = sdata;
 778         return mc;
 779 }
 780 EXPORT_SYMBOL(ieee80211_get_mc_list_item);
 781
 782 static void ieee80211_stat_refresh(unsigned long data)
 783 {
 784         struct ieee80211_local *local = (struct ieee80211_local *) data;
 785         struct sta_info *sta;
 786         struct ieee80211_sub_if_data *sdata;
 787
 788         if (!local->stat_time)
 789                 return;
 790
 791         /* go through all stations */
 792         read_lock_bh(&local->sta_lock);
 793         list_for_each_entry(sta, &local->sta_list, list) {
 794                 sta->channel_use = (sta->channel_use_raw / local->stat_time) /
 795                         CHAN_UTIL_PER_10MS;
 796                 sta->channel_use_raw = 0;
 797         }
 798         read_unlock_bh(&local->sta_lock);
 799
 800         /* go through all subinterfaces */
 801         read_lock(&local->sub_if_lock);
 802         list_for_each_entry(sdata, &local->sub_if_list, list) {
 803                 sdata->channel_use = (sdata->channel_use_raw /
 804                                       local->stat_time) / CHAN_UTIL_PER_10MS;
 805                 sdata->channel_use_raw = 0;
 806         }
 807         read_unlock(&local->sub_if_lock);
 808
 809         /* hardware interface */
 810         local->channel_use = (local->channel_use_raw /
 811                               local->stat_time) / CHAN_UTIL_PER_10MS;
 812         local->channel_use_raw = 0;
 813
 814         local->stat_timer.expires = jiffies + HZ * local->stat_time / 100;
 815         add_timer(&local->stat_timer);
 816 }
 817
 818 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
 819                                  struct sk_buff *skb,
 820                                  struct ieee80211_tx_status *status)
 821 {
 822         struct ieee80211_local *local = hw_to_local(hw);
 823         struct ieee80211_tx_status *saved;
 824         int tmp;
 825
 826         skb->dev = local->mdev;
 827         saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC);
 828         if (unlikely(!saved)) {
 829                 if (net_ratelimit())
 830                         printk(KERN_WARNING "%s: Not enough memory, "
 831                                "dropping tx status", skb->dev->name);
 832                 /* should be dev_kfree_skb_irq, but due to this function being
 833                  * named _irqsafe instead of just _irq we can't be sure that
 834                  * people won't call it from non-irq contexts */
 835                 dev_kfree_skb_any(skb);
 836                 return;
 837         }
 838         memcpy(saved, status, sizeof(struct ieee80211_tx_status));
 839         /* copy pointer to saved status into skb->cb for use by tasklet */
 840         memcpy(skb->cb, &saved, sizeof(saved));
 841
 842         skb->pkt_type = IEEE80211_TX_STATUS_MSG;
 843         skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ?
 844                        &local->skb_queue : &local->skb_queue_unreliable, skb);
 845         tmp = skb_queue_len(&local->skb_queue) +
 846                 skb_queue_len(&local->skb_queue_unreliable);
 847         while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
 848                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 849                 memcpy(&saved, skb->cb, sizeof(saved));
 850                 kfree(saved);
 851                 dev_kfree_skb_irq(skb);
 852                 tmp--;
 853                 I802_DEBUG_INC(local->tx_status_drop);
 854         }
 855         tasklet_schedule(&local->tasklet);
 856 }
 857 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
 858
 859 static void ieee80211_tasklet_handler(unsigned long data)
 860 {
 861         struct ieee80211_local *local = (struct ieee80211_local *) data;
 862         struct sk_buff *skb;
 863         struct ieee80211_rx_status rx_status;
 864         struct ieee80211_tx_status *tx_status;
 865
 866         while ((skb = skb_dequeue(&local->skb_queue)) ||
 867                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 868                 switch (skb->pkt_type) {
 869                 case IEEE80211_RX_MSG:
 870                         /* status is in skb->cb */
 871                         memcpy(&rx_status, skb->cb, sizeof(rx_status));
 872                         /* Clear skb->type in order to not confuse kernel
 873                          * netstack. */
 874                         skb->pkt_type = 0;
 875                         __ieee80211_rx(local_to_hw(local), skb, &rx_status);
 876                         break;
 877                 case IEEE80211_TX_STATUS_MSG:
 878                         /* get pointer to saved status out of skb->cb */
 879                         memcpy(&tx_status, skb->cb, sizeof(tx_status));
 880                         skb->pkt_type = 0;
 881                         ieee80211_tx_status(local_to_hw(local),
 882                                             skb, tx_status);
 883                         kfree(tx_status);
 884                         break;
 885                 default: /* should never get here! */
 886                         printk(KERN_ERR "%s: Unknown message type (%d)\n",
 887                                local->mdev->name, skb->pkt_type);
 888                         dev_kfree_skb(skb);
 889                         break;
 890                 }
 891         }
 892 }
 893
 894 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
 895  * make a prepared TX frame (one that has been given to hw) to look like brand
 896  * new IEEE 802.11 frame that is ready to go through TX processing again.
 897  * Also, tx_packet_data in cb is restored from tx_control. */
 898 static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
 899                                       struct ieee80211_key *key,
 900                                       struct sk_buff *skb,
 901                                       struct ieee80211_tx_control *control)
 902 {
 903         int hdrlen, iv_len, mic_len;
 904         struct ieee80211_tx_packet_data *pkt_data;
 905
 906         pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
 907         pkt_data->ifindex = control->ifindex;
 908         pkt_data->mgmt_iface = (control->type == IEEE80211_IF_TYPE_MGMT);
 909         pkt_data->req_tx_status = !!(control->flags & IEEE80211_TXCTL_REQ_TX_STATUS);
 910         pkt_data->do_not_encrypt = !!(control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT);
 911         pkt_data->requeue = !!(control->flags & IEEE80211_TXCTL_REQUEUE);
 912         pkt_data->queue = control->queue;
 913
 914         hdrlen = ieee80211_get_hdrlen_from_skb(skb);
 915
 916         if (!key)
 917                 goto no_key;
 918
 919         switch (key->alg) {
 920         case ALG_WEP:
 921                 iv_len = WEP_IV_LEN;
 922                 mic_len = WEP_ICV_LEN;
 923                 break;
 924         case ALG_TKIP:
 925                 iv_len = TKIP_IV_LEN;
 926                 mic_len = TKIP_ICV_LEN;
 927                 break;
 928         case ALG_CCMP:
 929                 iv_len = CCMP_HDR_LEN;
 930                 mic_len = CCMP_MIC_LEN;
 931                 break;
 932         default:
 933                 goto no_key;
 934         }
 935
 936         if (skb->len >= mic_len && key->force_sw_encrypt)
 937                 skb_trim(skb, skb->len - mic_len);
 938         if (skb->len >= iv_len && skb->len > hdrlen) {
 939                 memmove(skb->data + iv_len, skb->data, hdrlen);
 940                 skb_pull(skb, iv_len);
 941         }
 942
 943 no_key:
 944         {
 945                 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 946                 u16 fc = le16_to_cpu(hdr->frame_control);
 947                 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
 948                         fc &= ~IEEE80211_STYPE_QOS_DATA;
 949                         hdr->frame_control = cpu_to_le16(fc);
 950                         memmove(skb->data + 2, skb->data, hdrlen - 2);
 951                         skb_pull(skb, 2);
 952                 }
 953         }
 954 }
 955
 956 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
 957                          struct ieee80211_tx_status *status)
 958 {
 959         struct sk_buff *skb2;
 960         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 961         struct ieee80211_local *local = hw_to_local(hw);
 962         u16 frag, type;
 963         u32 msg_type;
 964         struct ieee80211_tx_status_rtap_hdr *rthdr;
 965         struct ieee80211_sub_if_data *sdata;
 966         int monitors;
 967
 968         if (!status) {
 969                 printk(KERN_ERR
 970                        "%s: ieee80211_tx_status called with NULL status\n",
 971                        local->mdev->name);
 972                 dev_kfree_skb(skb);
 973                 return;
 974         }
 975
 976         if (status->excessive_retries) {
 977                 struct sta_info *sta;
 978                 sta = sta_info_get(local, hdr->addr1);
 979                 if (sta) {
 980                         if (sta->flags & WLAN_STA_PS) {
 981                                 /* The STA is in power save mode, so assume
 982                                  * that this TX packet failed because of that.
 983                                  */
 984                                 status->excessive_retries = 0;
 985                                 status->flags |= IEEE80211_TX_STATUS_TX_FILTERED;
 986                         }
 987                         sta_info_put(sta);
 988                 }
 989         }
 990
 991         if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
 992                 struct sta_info *sta;
 993                 sta = sta_info_get(local, hdr->addr1);
 994                 if (sta) {
 995                         sta->tx_filtered_count++;
 996
 997                         /* Clear the TX filter mask for this STA when sending
 998                          * the next packet. If the STA went to power save mode,
 999                          * this will happen when it is waking up for the next
1000                          * time. */
1001                         sta->clear_dst_mask = 1;
1002
1003                         /* TODO: Is the WLAN_STA_PS flag always set here or is
1004                          * the race between RX and TX status causing some
1005                          * packets to be filtered out before 80211.o gets an
1006                          * update for PS status? This seems to be the case, so
1007                          * no changes are likely to be needed. */
1008                         if (sta->flags & WLAN_STA_PS &&
1009                             skb_queue_len(&sta->tx_filtered) <
1010                             STA_MAX_TX_BUFFER) {
1011                                 ieee80211_remove_tx_extra(local, sta->key,
1012                                                           skb,
1013                                                           &status->control);
1014                                 skb_queue_tail(&sta->tx_filtered, skb);
1015                         } else if (!(sta->flags & WLAN_STA_PS) &&
1016                                    !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) {
1017                                 /* Software retry the packet once */
1018                                 status->control.flags |= IEEE80211_TXCTL_REQUEUE;
1019                                 ieee80211_remove_tx_extra(local, sta->key,
1020                                                           skb,
1021                                                           &status->control);
1022                                 dev_queue_xmit(skb);
1023                         } else {
1024                                 if (net_ratelimit()) {
1025                                         printk(KERN_DEBUG "%s: dropped TX "
1026                                                "filtered frame queue_len=%d "
1027                                                "PS=%d @%lu\n",
1028                                                local->mdev->name,
1029                                                skb_queue_len(
1030                                                        &sta->tx_filtered),
1031                                                !!(sta->flags & WLAN_STA_PS),
1032                                                jiffies);
1033                                 }
1034                                 dev_kfree_skb(skb);
1035                         }
1036                         sta_info_put(sta);
1037                         return;
1038                 }
1039         } else {
1040                 /* FIXME: STUPID to call this with both local and local->mdev */
1041                 rate_control_tx_status(local, local->mdev, skb, status);
1042         }
1043
1044         ieee80211_led_tx(local, 0);
1045
1046         /* SNMP counters
1047          * Fragments are passed to low-level drivers as separate skbs, so these
1048          * are actually fragments, not frames. Update frame counters only for
1049          * the first fragment of the frame. */
1050
1051         frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
1052         type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
1053
1054         if (status->flags & IEEE80211_TX_STATUS_ACK) {
1055                 if (frag == 0) {
1056                         local->dot11TransmittedFrameCount++;
1057                         if (is_multicast_ether_addr(hdr->addr1))
1058                                 local->dot11MulticastTransmittedFrameCount++;
1059                         if (status->retry_count > 0)
1060                                 local->dot11RetryCount++;
1061                         if (status->retry_count > 1)
1062                                 local->dot11MultipleRetryCount++;
1063                 }
1064
1065                 /* This counter shall be incremented for an acknowledged MPDU
1066                  * with an individual address in the address 1 field or an MPDU
1067                  * with a multicast address in the address 1 field of type Data
1068                  * or Management. */
1069                 if (!is_multicast_ether_addr(hdr->addr1) ||
1070                     type == IEEE80211_FTYPE_DATA ||
1071                     type == IEEE80211_FTYPE_MGMT)
1072                         local->dot11TransmittedFragmentCount++;
1073         } else {
1074                 if (frag == 0)
1075                         local->dot11FailedCount++;
1076         }
1077
1078         msg_type = (status->flags & IEEE80211_TX_STATUS_ACK) ?
1079                 ieee80211_msg_tx_callback_ack : ieee80211_msg_tx_callback_fail;
1080
1081         /* this was a transmitted frame, but now we want to reuse it */
1082         skb_orphan(skb);
1083
1084         if ((status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS) &&
1085             local->apdev) {
1086                 if (local->monitors) {
1087                         skb2 = skb_clone(skb, GFP_ATOMIC);
1088                 } else {
1089                         skb2 = skb;
1090                         skb = NULL;
1091                 }
1092
1093                 if (skb2)
1094                         /* Send frame to hostapd */
1095                         ieee80211_rx_mgmt(local, skb2, NULL, msg_type);
1096
1097                 if (!skb)
1098                         return;
1099         }
1100
1101         if (!local->monitors) {
1102                 dev_kfree_skb(skb);
1103                 return;
1104         }
1105
1106         /* send frame to monitor interfaces now */
1107
1108         if (skb_headroom(skb) < sizeof(*rthdr)) {
1109                 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
1110                 dev_kfree_skb(skb);
1111                 return;
1112         }
1113
1114         rthdr = (struct ieee80211_tx_status_rtap_hdr*)
1115                                 skb_push(skb, sizeof(*rthdr));
1116
1117         memset(rthdr, 0, sizeof(*rthdr));
1118         rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
1119         rthdr->hdr.it_present =
1120                 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
1121                             (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
1122
1123         if (!(status->flags & IEEE80211_TX_STATUS_ACK) &&
1124             !is_multicast_ether_addr(hdr->addr1))
1125                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
1126
1127         if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) &&
1128             (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT))
1129                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
1130         else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS)
1131                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
1132
1133         rthdr->data_retries = status->retry_count;
1134
1135         read_lock(&local->sub_if_lock);
1136         monitors = local->monitors;
1137         list_for_each_entry(sdata, &local->sub_if_list, list) {
1138                 /*
1139                  * Using the monitors counter is possibly racy, but
1140                  * if the value is wrong we simply either clone the skb
1141                  * once too much or forget sending it to one monitor iface
1142                  * The latter case isn't nice but fixing the race is much
1143                  * more complicated.
1144                  */
1145                 if (!monitors || !skb)
1146                         goto out;
1147
1148                 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
1149                         if (!netif_running(sdata->dev))
1150                                 continue;
1151                         monitors--;
1152                         if (monitors)
1153                                 skb2 = skb_clone(skb, GFP_KERNEL);
1154                         else
1155                                 skb2 = NULL;
1156                         skb->dev = sdata->dev;
1157                         /* XXX: is this sufficient for BPF? */
1158                         skb_set_mac_header(skb, 0);
1159                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1160                         skb->pkt_type = PACKET_OTHERHOST;
1161                         skb->protocol = htons(ETH_P_802_2);
1162                         memset(skb->cb, 0, sizeof(skb->cb));
1163                         netif_rx(skb);
1164                         skb = skb2;
1165                 }
1166         }
1167  out:
1168         read_unlock(&local->sub_if_lock);
1169         if (skb)
1170                 dev_kfree_skb(skb);
1171 }
1172 EXPORT_SYMBOL(ieee80211_tx_status);
1173
1174 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
1175                                         const struct ieee80211_ops *ops)
1176 {
1177         struct net_device *mdev;
1178         struct ieee80211_local *local;
1179         struct ieee80211_sub_if_data *sdata;
1180         int priv_size;
1181         struct wiphy *wiphy;
1182
1183         /* Ensure 32-byte alignment of our private data and hw private data.
1184          * We use the wiphy priv data for both our ieee80211_local and for
1185          * the driver's private data
1186          *
1187          * In memory it'll be like this:
1188          *
1189          * +-------------------------+
1190          * | struct wiphy           |
1191          * +-------------------------+
1192          * | struct ieee80211_local  |
1193          * +-------------------------+
1194          * | driver's private data   |
1195          * +-------------------------+
1196          *
1197          */
1198         priv_size = ((sizeof(struct ieee80211_local) +
1199                       NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1200                     priv_data_len;
1201
1202         wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1203
1204         if (!wiphy)
1205                 return NULL;
1206
1207         wiphy->privid = mac80211_wiphy_privid;
1208
1209         local = wiphy_priv(wiphy);
1210         local->hw.wiphy = wiphy;
1211
1212         local->hw.priv = (char *)local +
1213                          ((sizeof(struct ieee80211_local) +
1214                            NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1215
1216         BUG_ON(!ops->tx);
1217         BUG_ON(!ops->config);
1218         BUG_ON(!ops->add_interface);
1219         local->ops = ops;
1220
1221         /* for now, mdev needs sub_if_data :/ */
1222         mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
1223                             "wmaster%d", ether_setup);
1224         if (!mdev) {
1225                 wiphy_free(wiphy);
1226                 return NULL;
1227         }
1228
1229         sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
1230         mdev->ieee80211_ptr = &sdata->wdev;
1231         sdata->wdev.wiphy = wiphy;
1232
1233         local->hw.queues = 1; /* default */
1234
1235         local->mdev = mdev;
1236         local->rx_pre_handlers = ieee80211_rx_pre_handlers;
1237         local->rx_handlers = ieee80211_rx_handlers;
1238         local->tx_handlers = ieee80211_tx_handlers;
1239
1240         local->bridge_packets = 1;
1241
1242         local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1243         local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1244         local->short_retry_limit = 7;
1245         local->long_retry_limit = 4;
1246         local->hw.conf.radio_enabled = 1;
1247
1248         local->enabled_modes = (unsigned int) -1;
1249
1250         INIT_LIST_HEAD(&local->modes_list);
1251
1252         rwlock_init(&local->sub_if_lock);
1253         INIT_LIST_HEAD(&local->sub_if_list);
1254
1255         INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
1256         init_timer(&local->stat_timer);
1257         local->stat_timer.function = ieee80211_stat_refresh;
1258         local->stat_timer.data = (unsigned long) local;
1259         ieee80211_rx_bss_list_init(mdev);
1260
1261         sta_info_init(local);
1262
1263         mdev->hard_start_xmit = ieee80211_master_start_xmit;
1264         mdev->open = ieee80211_master_open;
1265         mdev->stop = ieee80211_master_stop;
1266         mdev->type = ARPHRD_IEEE80211;
1267         mdev->hard_header_parse = header_parse_80211;
1268
1269         sdata->type = IEEE80211_IF_TYPE_AP;
1270         sdata->dev = mdev;
1271         sdata->local = local;
1272         sdata->u.ap.force_unicast_rateidx = -1;
1273         sdata->u.ap.max_ratectrl_rateidx = -1;
1274         ieee80211_if_sdata_init(sdata);
1275         list_add_tail(&sdata->list, &local->sub_if_list);
1276
1277         tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1278                      (unsigned long)local);
1279         tasklet_disable(&local->tx_pending_tasklet);
1280
1281         tasklet_init(&local->tasklet,
1282                      ieee80211_tasklet_handler,
1283                      (unsigned long) local);
1284         tasklet_disable(&local->tasklet);
1285
1286         skb_queue_head_init(&local->skb_queue);
1287         skb_queue_head_init(&local->skb_queue_unreliable);
1288
1289         return local_to_hw(local);
1290 }
1291 EXPORT_SYMBOL(ieee80211_alloc_hw);
1292
1293 int ieee80211_register_hw(struct ieee80211_hw *hw)
1294 {
1295         struct ieee80211_local *local = hw_to_local(hw);
1296         const char *name;
1297         int result;
1298
1299         result = wiphy_register(local->hw.wiphy);
1300         if (result < 0)
1301                 return result;
1302
1303         name = wiphy_dev(local->hw.wiphy)->driver->name;
1304         local->hw.workqueue = create_singlethread_workqueue(name);
1305         if (!local->hw.workqueue) {
1306                 result = -ENOMEM;
1307                 goto fail_workqueue;
1308         }
1309
1310         /*
1311          * The hardware needs headroom for sending the frame,
1312          * and we need some headroom for passing the frame to monitor
1313          * interfaces, but never both at the same time.
1314          */
1315         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1316                                    sizeof(struct ieee80211_tx_status_rtap_hdr));
1317
1318         debugfs_hw_add(local);
1319
1320         local->hw.conf.beacon_int = 1000;
1321
1322         local->wstats_flags |= local->hw.max_rssi ?
1323                                IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID;
1324         local->wstats_flags |= local->hw.max_signal ?
1325                                IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1326         local->wstats_flags |= local->hw.max_noise ?
1327                                IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1328         if (local->hw.max_rssi < 0 || local->hw.max_noise < 0)
1329                 local->wstats_flags |= IW_QUAL_DBM;
1330
1331         result = sta_info_start(local);
1332         if (result < 0)
1333                 goto fail_sta_info;
1334
1335         rtnl_lock();
1336         result = dev_alloc_name(local->mdev, local->mdev->name);
1337         if (result < 0)
1338                 goto fail_dev;
1339
1340         memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1341         SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1342
1343         result = register_netdevice(local->mdev);
1344         if (result < 0)
1345                 goto fail_dev;
1346
1347         ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1348
1349         result = ieee80211_init_rate_ctrl_alg(local, NULL);
1350         if (result < 0) {
1351                 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1352                        "algorithm\n", local->mdev->name);
1353                 goto fail_rate;
1354         }
1355
1356         result = ieee80211_wep_init(local);
1357
1358         if (result < 0) {
1359                 printk(KERN_DEBUG "%s: Failed to initialize wep\n",
1360                        local->mdev->name);
1361                 goto fail_wep;
1362         }
1363
1364         ieee80211_install_qdisc(local->mdev);
1365
1366         /* add one default STA interface */
1367         result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
1368                                   IEEE80211_IF_TYPE_STA);
1369         if (result)
1370                 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1371                        local->mdev->name);
1372
1373         local->reg_state = IEEE80211_DEV_REGISTERED;
1374         rtnl_unlock();
1375
1376         ieee80211_led_init(local);
1377
1378         return 0;
1379
1380 fail_wep:
1381         rate_control_deinitialize(local);
1382 fail_rate:
1383         ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1384         unregister_netdevice(local->mdev);
1385 fail_dev:
1386         rtnl_unlock();
1387         sta_info_stop(local);
1388 fail_sta_info:
1389         debugfs_hw_del(local);
1390         destroy_workqueue(local->hw.workqueue);
1391 fail_workqueue:
1392         wiphy_unregister(local->hw.wiphy);
1393         return result;
1394 }
1395 EXPORT_SYMBOL(ieee80211_register_hw);
1396
1397 int ieee80211_register_hwmode(struct ieee80211_hw *hw,
1398                               struct ieee80211_hw_mode *mode)
1399 {
1400         struct ieee80211_local *local = hw_to_local(hw);
1401         struct ieee80211_rate *rate;
1402         int i;
1403
1404         INIT_LIST_HEAD(&mode->list);
1405         list_add_tail(&mode->list, &local->modes_list);
1406
1407         local->hw_modes |= (1 << mode->mode);
1408         for (i = 0; i < mode->num_rates; i++) {
1409                 rate = &(mode->rates[i]);
1410                 rate->rate_inv = CHAN_UTIL_RATE_LCM / rate->rate;
1411         }
1412         ieee80211_prepare_rates(local, mode);
1413
1414         if (!local->oper_hw_mode) {
1415                 /* Default to this mode */
1416                 local->hw.conf.phymode = mode->mode;
1417                 local->oper_hw_mode = local->scan_hw_mode = mode;
1418                 local->oper_channel = local->scan_channel = &mode->channels[0];
1419                 local->hw.conf.mode = local->oper_hw_mode;
1420                 local->hw.conf.chan = local->oper_channel;
1421         }
1422
1423         if (!(hw->flags & IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED))
1424                 ieee80211_set_default_regdomain(mode);
1425
1426         return 0;
1427 }
1428 EXPORT_SYMBOL(ieee80211_register_hwmode);
1429
1430 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1431 {
1432         struct ieee80211_local *local = hw_to_local(hw);
1433         struct ieee80211_sub_if_data *sdata, *tmp;
1434         struct list_head tmp_list;
1435         int i;
1436
1437         tasklet_kill(&local->tx_pending_tasklet);
1438         tasklet_kill(&local->tasklet);
1439
1440         rtnl_lock();
1441
1442         BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
1443
1444         local->reg_state = IEEE80211_DEV_UNREGISTERED;
1445         if (local->apdev)
1446                 ieee80211_if_del_mgmt(local);
1447
1448         write_lock_bh(&local->sub_if_lock);
1449         list_replace_init(&local->sub_if_list, &tmp_list);
1450         write_unlock_bh(&local->sub_if_lock);
1451
1452         list_for_each_entry_safe(sdata, tmp, &tmp_list, list)
1453                 __ieee80211_if_del(local, sdata);
1454
1455         rtnl_unlock();
1456
1457         if (local->stat_time)
1458                 del_timer_sync(&local->stat_timer);
1459
1460         ieee80211_rx_bss_list_deinit(local->mdev);
1461         ieee80211_clear_tx_pending(local);
1462         sta_info_stop(local);
1463         rate_control_deinitialize(local);
1464         debugfs_hw_del(local);
1465
1466         for (i = 0; i < NUM_IEEE80211_MODES; i++) {
1467                 kfree(local->supp_rates[i]);
1468                 kfree(local->basic_rates[i]);
1469         }
1470
1471         if (skb_queue_len(&local->skb_queue)
1472                         || skb_queue_len(&local->skb_queue_unreliable))
1473                 printk(KERN_WARNING "%s: skb_queue not empty\n",
1474                        local->mdev->name);
1475         skb_queue_purge(&local->skb_queue);
1476         skb_queue_purge(&local->skb_queue_unreliable);
1477
1478         destroy_workqueue(local->hw.workqueue);
1479         wiphy_unregister(local->hw.wiphy);
1480         ieee80211_wep_free(local);
1481         ieee80211_led_exit(local);
1482 }
1483 EXPORT_SYMBOL(ieee80211_unregister_hw);
1484
1485 void ieee80211_free_hw(struct ieee80211_hw *hw)
1486 {
1487         struct ieee80211_local *local = hw_to_local(hw);
1488
1489         ieee80211_if_free(local->mdev);
1490         wiphy_free(local->hw.wiphy);
1491 }
1492 EXPORT_SYMBOL(ieee80211_free_hw);
1493
1494 struct net_device_stats *ieee80211_dev_stats(struct net_device *dev)
1495 {
1496         struct ieee80211_sub_if_data *sdata;
1497         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1498         return &sdata->stats;
1499 }
1500
1501 static int __init ieee80211_init(void)
1502 {
1503         struct sk_buff *skb;
1504         int ret;
1505
1506         BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb));
1507
1508         ret = ieee80211_wme_register();
1509         if (ret) {
1510                 printk(KERN_DEBUG "ieee80211_init: failed to "
1511                        "initialize WME (err=%d)\n", ret);
1512                 return ret;
1513         }
1514
1515         ieee80211_debugfs_netdev_init();
1516         ieee80211_regdomain_init();
1517
1518         return 0;
1519 }
1520
1521 static void __exit ieee80211_exit(void)
1522 {
1523         ieee80211_wme_unregister();
1524         ieee80211_debugfs_netdev_exit();
1525 }
1526
1527
1528 subsys_initcall(ieee80211_init);
1529 module_exit(ieee80211_exit);
1530
1531 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1532 MODULE_LICENSE("GPL");