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/net_namespace.h>
  25 #include <net/cfg80211.h>
  26
  27 #include "ieee80211_common.h"
  28 #include "ieee80211_i.h"
  29 #include "ieee80211_rate.h"
  30 #include "wep.h"
  31 #include "wme.h"
  32 #include "aes_ccm.h"
  33 #include "ieee80211_led.h"
  34 #include "cfg.h"
  35 #include "debugfs.h"
  36 #include "debugfs_netdev.h"
  37
  38 /*
  39  * For seeing transmitted packets on monitor interfaces
  40  * we have a radiotap header too.
  41  */
  42 struct ieee80211_tx_status_rtap_hdr {
  43         struct ieee80211_radiotap_header hdr;
  44         __le16 tx_flags;
  45         u8 data_retries;
  46 } __attribute__ ((packed));
  47
  48 /* common interface routines */
  49
  50 static int header_parse_80211(const struct sk_buff *skb, unsigned char *haddr)
  51 {
  52         memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
  53         return ETH_ALEN;
  54 }
  55
  56 /* must be called under mdev tx lock */
  57 static void ieee80211_configure_filter(struct ieee80211_local *local)
  58 {
  59         unsigned int changed_flags;
  60         unsigned int new_flags = 0;
  61
  62         if (local->iff_promiscs)
  63                 new_flags |= FIF_PROMISC_IN_BSS;
  64
  65         if (local->iff_allmultis)
  66                 new_flags |= FIF_ALLMULTI;
  67
  68         if (local->monitors)
  69                 new_flags |= FIF_CONTROL |
  70                              FIF_OTHER_BSS |
  71                              FIF_BCN_PRBRESP_PROMISC;
  72
  73         changed_flags = local->filter_flags ^ new_flags;
  74
  75         /* be a bit nasty */
  76         new_flags |= (1<<31);
  77
  78         local->ops->configure_filter(local_to_hw(local),
  79                                      changed_flags, &new_flags,
  80                                      local->mdev->mc_count,
  81                                      local->mdev->mc_list);
  82
  83         WARN_ON(new_flags & (1<<31));
  84
  85         local->filter_flags = new_flags & ~(1<<31);
  86 }
  87
  88 /* master interface */
  89
  90 static int ieee80211_master_open(struct net_device *dev)
  91 {
  92         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
  93         struct ieee80211_sub_if_data *sdata;
  94         int res = -EOPNOTSUPP;
  95
  96         read_lock(&local->sub_if_lock);
  97         list_for_each_entry(sdata, &local->sub_if_list, list) {
  98                 if (sdata->dev != dev && netif_running(sdata->dev)) {
  99                         res = 0;
 100                         break;
 101                 }
 102         }
 103         read_unlock(&local->sub_if_lock);
 104         return res;
 105 }
 106
 107 static int ieee80211_master_stop(struct net_device *dev)
 108 {
 109         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 110         struct ieee80211_sub_if_data *sdata;
 111
 112         read_lock(&local->sub_if_lock);
 113         list_for_each_entry(sdata, &local->sub_if_list, list)
 114                 if (sdata->dev != dev && netif_running(sdata->dev))
 115                         dev_close(sdata->dev);
 116         read_unlock(&local->sub_if_lock);
 117
 118         return 0;
 119 }
 120
 121 static void ieee80211_master_set_multicast_list(struct net_device *dev)
 122 {
 123         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 124
 125         ieee80211_configure_filter(local);
 126 }
 127
 128 /* management interface */
 129
 130 static void
 131 ieee80211_fill_frame_info(struct ieee80211_local *local,
 132                           struct ieee80211_frame_info *fi,
 133                           struct ieee80211_rx_status *status)
 134 {
 135         if (status) {
 136                 struct timespec ts;
 137                 struct ieee80211_rate *rate;
 138
 139                 jiffies_to_timespec(jiffies, &ts);
 140                 fi->hosttime = cpu_to_be64((u64) ts.tv_sec * 1000000 +
 141                                            ts.tv_nsec / 1000);
 142                 fi->mactime = cpu_to_be64(status->mactime);
 143                 switch (status->phymode) {
 144                 case MODE_IEEE80211A:
 145                         fi->phytype = htonl(ieee80211_phytype_ofdm_dot11_a);
 146                         break;
 147                 case MODE_IEEE80211B:
 148                         fi->phytype = htonl(ieee80211_phytype_dsss_dot11_b);
 149                         break;
 150                 case MODE_IEEE80211G:
 151                         fi->phytype = htonl(ieee80211_phytype_pbcc_dot11_g);
 152                         break;
 153                 default:
 154                         fi->phytype = htonl(0xAAAAAAAA);
 155                         break;
 156                 }
 157                 fi->channel = htonl(status->channel);
 158                 rate = ieee80211_get_rate(local, status->phymode,
 159                                           status->rate);
 160                 if (rate) {
 161                         fi->datarate = htonl(rate->rate);
 162                         if (rate->flags & IEEE80211_RATE_PREAMBLE2) {
 163                                 if (status->rate == rate->val)
 164                                         fi->preamble = htonl(2); /* long */
 165                                 else if (status->rate == rate->val2)
 166                                         fi->preamble = htonl(1); /* short */
 167                         } else
 168                                 fi->preamble = htonl(0);
 169                 } else {
 170                         fi->datarate = htonl(0);
 171                         fi->preamble = htonl(0);
 172                 }
 173
 174                 fi->antenna = htonl(status->antenna);
 175                 fi->priority = htonl(0xffffffff); /* no clue */
 176                 fi->ssi_type = htonl(ieee80211_ssi_raw);
 177                 fi->ssi_signal = htonl(status->ssi);
 178                 fi->ssi_noise = 0x00000000;
 179                 fi->encoding = 0;
 180         } else {
 181                 /* clear everything because we really don't know.
 182                  * the msg_type field isn't present on monitor frames
 183                  * so we don't know whether it will be present or not,
 184                  * but it's ok to not clear it since it'll be assigned
 185                  * anyway */
 186                 memset(fi, 0, sizeof(*fi) - sizeof(fi->msg_type));
 187
 188                 fi->ssi_type = htonl(ieee80211_ssi_none);
 189         }
 190         fi->version = htonl(IEEE80211_FI_VERSION);
 191         fi->length = cpu_to_be32(sizeof(*fi) - sizeof(fi->msg_type));
 192 }
 193
 194 /* this routine is actually not just for this, but also
 195  * for pushing fake 'management' frames into userspace.
 196  * it shall be replaced by a netlink-based system. */
 197 void
 198 ieee80211_rx_mgmt(struct ieee80211_local *local, struct sk_buff *skb,
 199                   struct ieee80211_rx_status *status, u32 msg_type)
 200 {
 201         struct ieee80211_frame_info *fi;
 202         const size_t hlen = sizeof(struct ieee80211_frame_info);
 203         struct net_device *dev = local->apdev;
 204
 205         skb->dev = dev;
 206
 207         if (skb_headroom(skb) < hlen) {
 208                 I802_DEBUG_INC(local->rx_expand_skb_head);
 209                 if (pskb_expand_head(skb, hlen, 0, GFP_ATOMIC)) {
 210                         dev_kfree_skb(skb);
 211                         return;
 212                 }
 213         }
 214
 215         fi = (struct ieee80211_frame_info *) skb_push(skb, hlen);
 216
 217         ieee80211_fill_frame_info(local, fi, status);
 218         fi->msg_type = htonl(msg_type);
 219
 220         dev->stats.rx_packets++;
 221         dev->stats.rx_bytes += skb->len;
 222
 223         skb_set_mac_header(skb, 0);
 224         skb->ip_summed = CHECKSUM_UNNECESSARY;
 225         skb->pkt_type = PACKET_OTHERHOST;
 226         skb->protocol = htons(ETH_P_802_2);
 227         memset(skb->cb, 0, sizeof(skb->cb));
 228         netif_rx(skb);
 229 }
 230
 231 static int ieee80211_mgmt_open(struct net_device *dev)
 232 {
 233         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 234
 235         if (!netif_running(local->mdev))
 236                 return -EOPNOTSUPP;
 237         return 0;
 238 }
 239
 240 static int ieee80211_mgmt_stop(struct net_device *dev)
 241 {
 242         return 0;
 243 }
 244
 245 static int ieee80211_change_mtu_apdev(struct net_device *dev, int new_mtu)
 246 {
 247         /* FIX: what would be proper limits for MTU?
 248          * This interface uses 802.11 frames. */
 249         if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN) {
 250                 printk(KERN_WARNING "%s: invalid MTU %d\n",
 251                        dev->name, new_mtu);
 252                 return -EINVAL;
 253         }
 254
 255 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 256         printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
 257 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
 258         dev->mtu = new_mtu;
 259         return 0;
 260 }
 261
 262 void ieee80211_if_mgmt_setup(struct net_device *dev)
 263 {
 264         ether_setup(dev);
 265         dev->hard_start_xmit = ieee80211_mgmt_start_xmit;
 266         dev->change_mtu = ieee80211_change_mtu_apdev;
 267         dev->open = ieee80211_mgmt_open;
 268         dev->stop = ieee80211_mgmt_stop;
 269         dev->type = ARPHRD_IEEE80211_PRISM;
 270         dev->uninit = ieee80211_if_reinit;
 271         dev->destructor = ieee80211_if_free;
 272 }
 273
 274 /* regular interfaces */
 275
 276 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
 277 {
 278         /* FIX: what would be proper limits for MTU?
 279          * This interface uses 802.3 frames. */
 280         if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6) {
 281                 printk(KERN_WARNING "%s: invalid MTU %d\n",
 282                        dev->name, new_mtu);
 283                 return -EINVAL;
 284         }
 285
 286 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 287         printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
 288 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
 289         dev->mtu = new_mtu;
 290         return 0;
 291 }
 292
 293 static inline int identical_mac_addr_allowed(int type1, int type2)
 294 {
 295         return (type1 == IEEE80211_IF_TYPE_MNTR ||
 296                 type2 == IEEE80211_IF_TYPE_MNTR ||
 297                 (type1 == IEEE80211_IF_TYPE_AP &&
 298                  type2 == IEEE80211_IF_TYPE_WDS) ||
 299                 (type1 == IEEE80211_IF_TYPE_WDS &&
 300                  (type2 == IEEE80211_IF_TYPE_WDS ||
 301                   type2 == IEEE80211_IF_TYPE_AP)) ||
 302                 (type1 == IEEE80211_IF_TYPE_AP &&
 303                  type2 == IEEE80211_IF_TYPE_VLAN) ||
 304                 (type1 == IEEE80211_IF_TYPE_VLAN &&
 305                  (type2 == IEEE80211_IF_TYPE_AP ||
 306                   type2 == IEEE80211_IF_TYPE_VLAN)));
 307 }
 308
 309 static int ieee80211_open(struct net_device *dev)
 310 {
 311         struct ieee80211_sub_if_data *sdata, *nsdata;
 312         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 313         struct ieee80211_if_init_conf conf;
 314         int res;
 315
 316         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 317
 318         read_lock(&local->sub_if_lock);
 319         list_for_each_entry(nsdata, &local->sub_if_list, list) {
 320                 struct net_device *ndev = nsdata->dev;
 321
 322                 if (ndev != dev && ndev != local->mdev && netif_running(ndev) &&
 323                     compare_ether_addr(dev->dev_addr, ndev->dev_addr) == 0) {
 324                         /*
 325                          * check whether it may have the same address
 326                          */
 327                         if (!identical_mac_addr_allowed(sdata->type,
 328                                                         nsdata->type)) {
 329                                 read_unlock(&local->sub_if_lock);
 330                                 return -ENOTUNIQ;
 331                         }
 332
 333                         /*
 334                          * can only add VLANs to enabled APs
 335                          */
 336                         if (sdata->type == IEEE80211_IF_TYPE_VLAN &&
 337                             nsdata->type == IEEE80211_IF_TYPE_AP &&
 338                             netif_running(nsdata->dev))
 339                                 sdata->u.vlan.ap = nsdata;
 340                 }
 341         }
 342         read_unlock(&local->sub_if_lock);
 343
 344         switch (sdata->type) {
 345         case IEEE80211_IF_TYPE_WDS:
 346                 if (is_zero_ether_addr(sdata->u.wds.remote_addr))
 347                         return -ENOLINK;
 348                 break;
 349         case IEEE80211_IF_TYPE_VLAN:
 350                 if (!sdata->u.vlan.ap)
 351                         return -ENOLINK;
 352                 break;
 353         }
 354
 355         if (local->open_count == 0) {
 356                 res = 0;
 357                 if (local->ops->start)
 358                         res = local->ops->start(local_to_hw(local));
 359                 if (res)
 360                         return res;
 361         }
 362
 363         switch (sdata->type) {
 364         case IEEE80211_IF_TYPE_VLAN:
 365                 list_add(&sdata->u.vlan.list, &sdata->u.vlan.ap->u.ap.vlans);
 366                 /* no need to tell driver */
 367                 break;
 368         case IEEE80211_IF_TYPE_MNTR:
 369                 /* must be before the call to ieee80211_configure_filter */
 370                 local->monitors++;
 371                 if (local->monitors == 1) {
 372                         netif_tx_lock_bh(local->mdev);
 373                         ieee80211_configure_filter(local);
 374                         netif_tx_unlock_bh(local->mdev);
 375
 376                         local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
 377                         ieee80211_hw_config(local);
 378                 }
 379                 break;
 380         case IEEE80211_IF_TYPE_STA:
 381         case IEEE80211_IF_TYPE_IBSS:
 382                 sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
 383                 /* fall through */
 384         default:
 385                 conf.if_id = dev->ifindex;
 386                 conf.type = sdata->type;
 387                 conf.mac_addr = dev->dev_addr;
 388                 res = local->ops->add_interface(local_to_hw(local), &conf);
 389                 if (res && !local->open_count && local->ops->stop)
 390                         local->ops->stop(local_to_hw(local));
 391                 if (res)
 392                         return res;
 393
 394                 ieee80211_if_config(dev);
 395                 ieee80211_reset_erp_info(dev);
 396                 ieee80211_enable_keys(sdata);
 397
 398                 if (sdata->type == IEEE80211_IF_TYPE_STA &&
 399                     !local->user_space_mlme)
 400                         netif_carrier_off(dev);
 401                 else
 402                         netif_carrier_on(dev);
 403         }
 404
 405         if (local->open_count == 0) {
 406                 res = dev_open(local->mdev);
 407                 WARN_ON(res);
 408                 if (local->apdev) {
 409                         res = dev_open(local->apdev);
 410                         WARN_ON(res);
 411                 }
 412                 tasklet_enable(&local->tx_pending_tasklet);
 413                 tasklet_enable(&local->tasklet);
 414         }
 415
 416         local->open_count++;
 417
 418         netif_start_queue(dev);
 419
 420         return 0;
 421 }
 422
 423 static int ieee80211_stop(struct net_device *dev)
 424 {
 425         struct ieee80211_sub_if_data *sdata;
 426         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 427         struct ieee80211_if_init_conf conf;
 428
 429         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 430
 431         netif_stop_queue(dev);
 432
 433         dev_mc_unsync(local->mdev, dev);
 434
 435         /* down all dependent devices, that is VLANs */
 436         if (sdata->type == IEEE80211_IF_TYPE_AP) {
 437                 struct ieee80211_sub_if_data *vlan, *tmp;
 438
 439                 list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans,
 440                                          u.vlan.list)
 441                         dev_close(vlan->dev);
 442                 WARN_ON(!list_empty(&sdata->u.ap.vlans));
 443         }
 444
 445         local->open_count--;
 446
 447         switch (sdata->type) {
 448         case IEEE80211_IF_TYPE_VLAN:
 449                 list_del(&sdata->u.vlan.list);
 450                 sdata->u.vlan.ap = NULL;
 451                 /* no need to tell driver */
 452                 break;
 453         case IEEE80211_IF_TYPE_MNTR:
 454                 local->monitors--;
 455                 if (local->monitors == 0) {
 456                         netif_tx_lock_bh(local->mdev);
 457                         ieee80211_configure_filter(local);
 458                         netif_tx_unlock_bh(local->mdev);
 459
 460                         local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
 461                         ieee80211_hw_config(local);
 462                 }
 463                 break;
 464         case IEEE80211_IF_TYPE_STA:
 465         case IEEE80211_IF_TYPE_IBSS:
 466                 sdata->u.sta.state = IEEE80211_DISABLED;
 467                 del_timer_sync(&sdata->u.sta.timer);
 468                 /*
 469                  * Holding the sub_if_lock for writing here blocks
 470                  * out the receive path and makes sure it's not
 471                  * currently processing a packet that may get
 472                  * added to the queue.
 473                  */
 474                 write_lock_bh(&local->sub_if_lock);
 475                 skb_queue_purge(&sdata->u.sta.skb_queue);
 476                 write_unlock_bh(&local->sub_if_lock);
 477
 478                 if (!local->ops->hw_scan &&
 479                     local->scan_dev == sdata->dev) {
 480                         local->sta_scanning = 0;
 481                         cancel_delayed_work(&local->scan_work);
 482                 }
 483                 flush_workqueue(local->hw.workqueue);
 484                 /* fall through */
 485         default:
 486                 conf.if_id = dev->ifindex;
 487                 conf.type = sdata->type;
 488                 conf.mac_addr = dev->dev_addr;
 489                 /* disable all keys for as long as this netdev is down */
 490                 ieee80211_disable_keys(sdata);
 491                 local->ops->remove_interface(local_to_hw(local), &conf);
 492         }
 493
 494         if (local->open_count == 0) {
 495                 if (netif_running(local->mdev))
 496                         dev_close(local->mdev);
 497
 498                 if (local->apdev)
 499                         dev_close(local->apdev);
 500
 501                 if (local->ops->stop)
 502                         local->ops->stop(local_to_hw(local));
 503
 504                 tasklet_disable(&local->tx_pending_tasklet);
 505                 tasklet_disable(&local->tasklet);
 506         }
 507
 508         return 0;
 509 }
 510
 511 static void ieee80211_set_multicast_list(struct net_device *dev)
 512 {
 513         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 514         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 515         int allmulti, promisc, sdata_allmulti, sdata_promisc;
 516
 517         allmulti = !!(dev->flags & IFF_ALLMULTI);
 518         promisc = !!(dev->flags & IFF_PROMISC);
 519         sdata_allmulti = sdata->flags & IEEE80211_SDATA_ALLMULTI;
 520         sdata_promisc = sdata->flags & IEEE80211_SDATA_PROMISC;
 521
 522         if (allmulti != sdata_allmulti) {
 523                 if (dev->flags & IFF_ALLMULTI)
 524                         local->iff_allmultis++;
 525                 else
 526                         local->iff_allmultis--;
 527                 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
 528         }
 529
 530         if (promisc != sdata_promisc) {
 531                 if (dev->flags & IFF_PROMISC)
 532                         local->iff_promiscs++;
 533                 else
 534                         local->iff_promiscs--;
 535                 sdata->flags ^= IEEE80211_SDATA_PROMISC;
 536         }
 537
 538         dev_mc_sync(local->mdev, dev);
 539 }
 540
 541 static const struct header_ops ieee80211_header_ops = {
 542         .create         = eth_header,
 543         .parse          = header_parse_80211,
 544         .rebuild        = eth_rebuild_header,
 545         .cache          = eth_header_cache,
 546         .cache_update   = eth_header_cache_update,
 547 };
 548
 549 /* Must not be called for mdev and apdev */
 550 void ieee80211_if_setup(struct net_device *dev)
 551 {
 552         ether_setup(dev);
 553         dev->header_ops = &ieee80211_header_ops;
 554         dev->hard_start_xmit = ieee80211_subif_start_xmit;
 555         dev->wireless_handlers = &ieee80211_iw_handler_def;
 556         dev->set_multicast_list = ieee80211_set_multicast_list;
 557         dev->change_mtu = ieee80211_change_mtu;
 558         dev->open = ieee80211_open;
 559         dev->stop = ieee80211_stop;
 560         dev->uninit = ieee80211_if_reinit;
 561         dev->destructor = ieee80211_if_free;
 562 }
 563
 564 /* WDS specialties */
 565
 566 int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr)
 567 {
 568         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 569         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 570         struct sta_info *sta;
 571         DECLARE_MAC_BUF(mac);
 572
 573         if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0)
 574                 return 0;
 575
 576         /* Create STA entry for the new peer */
 577         sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL);
 578         if (!sta)
 579                 return -ENOMEM;
 580         sta_info_put(sta);
 581
 582         /* Remove STA entry for the old peer */
 583         sta = sta_info_get(local, sdata->u.wds.remote_addr);
 584         if (sta) {
 585                 sta_info_free(sta);
 586                 sta_info_put(sta);
 587         } else {
 588                 printk(KERN_DEBUG "%s: could not find STA entry for WDS link "
 589                        "peer %s\n",
 590                        dev->name, print_mac(mac, sdata->u.wds.remote_addr));
 591         }
 592
 593         /* Update WDS link data */
 594         memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN);
 595
 596         return 0;
 597 }
 598
 599 /* everything else */
 600
 601 static int __ieee80211_if_config(struct net_device *dev,
 602                                  struct sk_buff *beacon,
 603                                  struct ieee80211_tx_control *control)
 604 {
 605         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 606         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 607         struct ieee80211_if_conf conf;
 608
 609         if (!local->ops->config_interface || !netif_running(dev))
 610                 return 0;
 611
 612         memset(&conf, 0, sizeof(conf));
 613         conf.type = sdata->type;
 614         if (sdata->type == IEEE80211_IF_TYPE_STA ||
 615             sdata->type == IEEE80211_IF_TYPE_IBSS) {
 616                 conf.bssid = sdata->u.sta.bssid;
 617                 conf.ssid = sdata->u.sta.ssid;
 618                 conf.ssid_len = sdata->u.sta.ssid_len;
 619                 conf.generic_elem = sdata->u.sta.extra_ie;
 620                 conf.generic_elem_len = sdata->u.sta.extra_ie_len;
 621         } else if (sdata->type == IEEE80211_IF_TYPE_AP) {
 622                 conf.ssid = sdata->u.ap.ssid;
 623                 conf.ssid_len = sdata->u.ap.ssid_len;
 624                 conf.generic_elem = sdata->u.ap.generic_elem;
 625                 conf.generic_elem_len = sdata->u.ap.generic_elem_len;
 626                 conf.beacon = beacon;
 627                 conf.beacon_control = control;
 628         }
 629         return local->ops->config_interface(local_to_hw(local),
 630                                            dev->ifindex, &conf);
 631 }
 632
 633 int ieee80211_if_config(struct net_device *dev)
 634 {
 635         return __ieee80211_if_config(dev, NULL, NULL);
 636 }
 637
 638 int ieee80211_if_config_beacon(struct net_device *dev)
 639 {
 640         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 641         struct ieee80211_tx_control control;
 642         struct sk_buff *skb;
 643
 644         if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
 645                 return 0;
 646         skb = ieee80211_beacon_get(local_to_hw(local), dev->ifindex, &control);
 647         if (!skb)
 648                 return -ENOMEM;
 649         return __ieee80211_if_config(dev, skb, &control);
 650 }
 651
 652 int ieee80211_hw_config(struct ieee80211_local *local)
 653 {
 654         struct ieee80211_hw_mode *mode;
 655         struct ieee80211_channel *chan;
 656         int ret = 0;
 657
 658         if (local->sta_scanning) {
 659                 chan = local->scan_channel;
 660                 mode = local->scan_hw_mode;
 661         } else {
 662                 chan = local->oper_channel;
 663                 mode = local->oper_hw_mode;
 664         }
 665
 666         local->hw.conf.channel = chan->chan;
 667         local->hw.conf.channel_val = chan->val;
 668         if (!local->hw.conf.power_level) {
 669                 local->hw.conf.power_level = chan->power_level;
 670         } else {
 671                 local->hw.conf.power_level = min(chan->power_level,
 672                                                  local->hw.conf.power_level);
 673         }
 674         local->hw.conf.freq = chan->freq;
 675         local->hw.conf.phymode = mode->mode;
 676         local->hw.conf.antenna_max = chan->antenna_max;
 677         local->hw.conf.chan = chan;
 678         local->hw.conf.mode = mode;
 679
 680 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 681         printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d "
 682                "phymode=%d\n", local->hw.conf.channel, local->hw.conf.freq,
 683                local->hw.conf.phymode);
 684 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
 685
 686         if (local->ops->config)
 687                 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
 688
 689         return ret;
 690 }
 691
 692 void ieee80211_erp_info_change_notify(struct net_device *dev, u8 changes)
 693 {
 694         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 695         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 696         if (local->ops->erp_ie_changed)
 697                 local->ops->erp_ie_changed(local_to_hw(local), changes,
 698                         !!(sdata->flags & IEEE80211_SDATA_USE_PROTECTION),
 699                         !(sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE));
 700 }
 701
 702 void ieee80211_reset_erp_info(struct net_device *dev)
 703 {
 704         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 705
 706         sdata->flags &= ~(IEEE80211_SDATA_USE_PROTECTION |
 707                         IEEE80211_SDATA_SHORT_PREAMBLE);
 708         ieee80211_erp_info_change_notify(dev,
 709                                          IEEE80211_ERP_CHANGE_PROTECTION |
 710                                          IEEE80211_ERP_CHANGE_PREAMBLE);
 711 }
 712
 713 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
 714                                  struct sk_buff *skb,
 715                                  struct ieee80211_tx_status *status)
 716 {
 717         struct ieee80211_local *local = hw_to_local(hw);
 718         struct ieee80211_tx_status *saved;
 719         int tmp;
 720
 721         skb->dev = local->mdev;
 722         saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC);
 723         if (unlikely(!saved)) {
 724                 if (net_ratelimit())
 725                         printk(KERN_WARNING "%s: Not enough memory, "
 726                                "dropping tx status", skb->dev->name);
 727                 /* should be dev_kfree_skb_irq, but due to this function being
 728                  * named _irqsafe instead of just _irq we can't be sure that
 729                  * people won't call it from non-irq contexts */
 730                 dev_kfree_skb_any(skb);
 731                 return;
 732         }
 733         memcpy(saved, status, sizeof(struct ieee80211_tx_status));
 734         /* copy pointer to saved status into skb->cb for use by tasklet */
 735         memcpy(skb->cb, &saved, sizeof(saved));
 736
 737         skb->pkt_type = IEEE80211_TX_STATUS_MSG;
 738         skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ?
 739                        &local->skb_queue : &local->skb_queue_unreliable, skb);
 740         tmp = skb_queue_len(&local->skb_queue) +
 741                 skb_queue_len(&local->skb_queue_unreliable);
 742         while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
 743                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 744                 memcpy(&saved, skb->cb, sizeof(saved));
 745                 kfree(saved);
 746                 dev_kfree_skb_irq(skb);
 747                 tmp--;
 748                 I802_DEBUG_INC(local->tx_status_drop);
 749         }
 750         tasklet_schedule(&local->tasklet);
 751 }
 752 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
 753
 754 static void ieee80211_tasklet_handler(unsigned long data)
 755 {
 756         struct ieee80211_local *local = (struct ieee80211_local *) data;
 757         struct sk_buff *skb;
 758         struct ieee80211_rx_status rx_status;
 759         struct ieee80211_tx_status *tx_status;
 760
 761         while ((skb = skb_dequeue(&local->skb_queue)) ||
 762                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 763                 switch (skb->pkt_type) {
 764                 case IEEE80211_RX_MSG:
 765                         /* status is in skb->cb */
 766                         memcpy(&rx_status, skb->cb, sizeof(rx_status));
 767                         /* Clear skb->type in order to not confuse kernel
 768                          * netstack. */
 769                         skb->pkt_type = 0;
 770                         __ieee80211_rx(local_to_hw(local), skb, &rx_status);
 771                         break;
 772                 case IEEE80211_TX_STATUS_MSG:
 773                         /* get pointer to saved status out of skb->cb */
 774                         memcpy(&tx_status, skb->cb, sizeof(tx_status));
 775                         skb->pkt_type = 0;
 776                         ieee80211_tx_status(local_to_hw(local),
 777                                             skb, tx_status);
 778                         kfree(tx_status);
 779                         break;
 780                 default: /* should never get here! */
 781                         printk(KERN_ERR "%s: Unknown message type (%d)\n",
 782                                wiphy_name(local->hw.wiphy), skb->pkt_type);
 783                         dev_kfree_skb(skb);
 784                         break;
 785                 }
 786         }
 787 }
 788
 789 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
 790  * make a prepared TX frame (one that has been given to hw) to look like brand
 791  * new IEEE 802.11 frame that is ready to go through TX processing again.
 792  * Also, tx_packet_data in cb is restored from tx_control. */
 793 static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
 794                                       struct ieee80211_key *key,
 795                                       struct sk_buff *skb,
 796                                       struct ieee80211_tx_control *control)
 797 {
 798         int hdrlen, iv_len, mic_len;
 799         struct ieee80211_tx_packet_data *pkt_data;
 800
 801         pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
 802         pkt_data->ifindex = control->ifindex;
 803         pkt_data->flags = 0;
 804         if (control->flags & IEEE80211_TXCTL_REQ_TX_STATUS)
 805                 pkt_data->flags |= IEEE80211_TXPD_REQ_TX_STATUS;
 806         if (control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT)
 807                 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
 808         if (control->flags & IEEE80211_TXCTL_REQUEUE)
 809                 pkt_data->flags |= IEEE80211_TXPD_REQUEUE;
 810         if (control->type == IEEE80211_IF_TYPE_MGMT)
 811                 pkt_data->flags |= IEEE80211_TXPD_MGMT_IFACE;
 812         pkt_data->queue = control->queue;
 813
 814         hdrlen = ieee80211_get_hdrlen_from_skb(skb);
 815
 816         if (!key)
 817                 goto no_key;
 818
 819         switch (key->conf.alg) {
 820         case ALG_WEP:
 821                 iv_len = WEP_IV_LEN;
 822                 mic_len = WEP_ICV_LEN;
 823                 break;
 824         case ALG_TKIP:
 825                 iv_len = TKIP_IV_LEN;
 826                 mic_len = TKIP_ICV_LEN;
 827                 break;
 828         case ALG_CCMP:
 829                 iv_len = CCMP_HDR_LEN;
 830                 mic_len = CCMP_MIC_LEN;
 831                 break;
 832         default:
 833                 goto no_key;
 834         }
 835
 836         if (skb->len >= mic_len &&
 837             !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
 838                 skb_trim(skb, skb->len - mic_len);
 839         if (skb->len >= iv_len && skb->len > hdrlen) {
 840                 memmove(skb->data + iv_len, skb->data, hdrlen);
 841                 skb_pull(skb, iv_len);
 842         }
 843
 844 no_key:
 845         {
 846                 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 847                 u16 fc = le16_to_cpu(hdr->frame_control);
 848                 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
 849                         fc &= ~IEEE80211_STYPE_QOS_DATA;
 850                         hdr->frame_control = cpu_to_le16(fc);
 851                         memmove(skb->data + 2, skb->data, hdrlen - 2);
 852                         skb_pull(skb, 2);
 853                 }
 854         }
 855 }
 856
 857 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
 858                          struct ieee80211_tx_status *status)
 859 {
 860         struct sk_buff *skb2;
 861         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 862         struct ieee80211_local *local = hw_to_local(hw);
 863         u16 frag, type;
 864         u32 msg_type;
 865         struct ieee80211_tx_status_rtap_hdr *rthdr;
 866         struct ieee80211_sub_if_data *sdata;
 867         int monitors;
 868
 869         if (!status) {
 870                 printk(KERN_ERR
 871                        "%s: ieee80211_tx_status called with NULL status\n",
 872                        wiphy_name(local->hw.wiphy));
 873                 dev_kfree_skb(skb);
 874                 return;
 875         }
 876
 877         if (status->excessive_retries) {
 878                 struct sta_info *sta;
 879                 sta = sta_info_get(local, hdr->addr1);
 880                 if (sta) {
 881                         if (sta->flags & WLAN_STA_PS) {
 882                                 /* The STA is in power save mode, so assume
 883                                  * that this TX packet failed because of that.
 884                                  */
 885                                 status->excessive_retries = 0;
 886                                 status->flags |= IEEE80211_TX_STATUS_TX_FILTERED;
 887                         }
 888                         sta_info_put(sta);
 889                 }
 890         }
 891
 892         if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
 893                 struct sta_info *sta;
 894                 sta = sta_info_get(local, hdr->addr1);
 895                 if (sta) {
 896                         sta->tx_filtered_count++;
 897
 898                         /* Clear the TX filter mask for this STA when sending
 899                          * the next packet. If the STA went to power save mode,
 900                          * this will happen when it is waking up for the next
 901                          * time. */
 902                         sta->clear_dst_mask = 1;
 903
 904                         /* TODO: Is the WLAN_STA_PS flag always set here or is
 905                          * the race between RX and TX status causing some
 906                          * packets to be filtered out before 80211.o gets an
 907                          * update for PS status? This seems to be the case, so
 908                          * no changes are likely to be needed. */
 909                         if (sta->flags & WLAN_STA_PS &&
 910                             skb_queue_len(&sta->tx_filtered) <
 911                             STA_MAX_TX_BUFFER) {
 912                                 ieee80211_remove_tx_extra(local, sta->key,
 913                                                           skb,
 914                                                           &status->control);
 915                                 skb_queue_tail(&sta->tx_filtered, skb);
 916                         } else if (!(sta->flags & WLAN_STA_PS) &&
 917                                    !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) {
 918                                 /* Software retry the packet once */
 919                                 status->control.flags |= IEEE80211_TXCTL_REQUEUE;
 920                                 ieee80211_remove_tx_extra(local, sta->key,
 921                                                           skb,
 922                                                           &status->control);
 923                                 dev_queue_xmit(skb);
 924                         } else {
 925                                 if (net_ratelimit()) {
 926                                         printk(KERN_DEBUG "%s: dropped TX "
 927                                                "filtered frame queue_len=%d "
 928                                                "PS=%d @%lu\n",
 929                                                wiphy_name(local->hw.wiphy),
 930                                                skb_queue_len(
 931                                                        &sta->tx_filtered),
 932                                                !!(sta->flags & WLAN_STA_PS),
 933                                                jiffies);
 934                                 }
 935                                 dev_kfree_skb(skb);
 936                         }
 937                         sta_info_put(sta);
 938                         return;
 939                 }
 940         } else {
 941                 /* FIXME: STUPID to call this with both local and local->mdev */
 942                 rate_control_tx_status(local, local->mdev, skb, status);
 943         }
 944
 945         ieee80211_led_tx(local, 0);
 946
 947         /* SNMP counters
 948          * Fragments are passed to low-level drivers as separate skbs, so these
 949          * are actually fragments, not frames. Update frame counters only for
 950          * the first fragment of the frame. */
 951
 952         frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
 953         type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
 954
 955         if (status->flags & IEEE80211_TX_STATUS_ACK) {
 956                 if (frag == 0) {
 957                         local->dot11TransmittedFrameCount++;
 958                         if (is_multicast_ether_addr(hdr->addr1))
 959                                 local->dot11MulticastTransmittedFrameCount++;
 960                         if (status->retry_count > 0)
 961                                 local->dot11RetryCount++;
 962                         if (status->retry_count > 1)
 963                                 local->dot11MultipleRetryCount++;
 964                 }
 965
 966                 /* This counter shall be incremented for an acknowledged MPDU
 967                  * with an individual address in the address 1 field or an MPDU
 968                  * with a multicast address in the address 1 field of type Data
 969                  * or Management. */
 970                 if (!is_multicast_ether_addr(hdr->addr1) ||
 971                     type == IEEE80211_FTYPE_DATA ||
 972                     type == IEEE80211_FTYPE_MGMT)
 973                         local->dot11TransmittedFragmentCount++;
 974         } else {
 975                 if (frag == 0)
 976                         local->dot11FailedCount++;
 977         }
 978
 979         msg_type = (status->flags & IEEE80211_TX_STATUS_ACK) ?
 980                 ieee80211_msg_tx_callback_ack : ieee80211_msg_tx_callback_fail;
 981
 982         /* this was a transmitted frame, but now we want to reuse it */
 983         skb_orphan(skb);
 984
 985         if ((status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS) &&
 986             local->apdev) {
 987                 if (local->monitors) {
 988                         skb2 = skb_clone(skb, GFP_ATOMIC);
 989                 } else {
 990                         skb2 = skb;
 991                         skb = NULL;
 992                 }
 993
 994                 if (skb2)
 995                         /* Send frame to hostapd */
 996                         ieee80211_rx_mgmt(local, skb2, NULL, msg_type);
 997
 998                 if (!skb)
 999                         return;
1000         }
1001
1002         if (!local->monitors) {
1003                 dev_kfree_skb(skb);
1004                 return;
1005         }
1006
1007         /* send frame to monitor interfaces now */
1008
1009         if (skb_headroom(skb) < sizeof(*rthdr)) {
1010                 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
1011                 dev_kfree_skb(skb);
1012                 return;
1013         }
1014
1015         rthdr = (struct ieee80211_tx_status_rtap_hdr*)
1016                                 skb_push(skb, sizeof(*rthdr));
1017
1018         memset(rthdr, 0, sizeof(*rthdr));
1019         rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
1020         rthdr->hdr.it_present =
1021                 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
1022                             (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
1023
1024         if (!(status->flags & IEEE80211_TX_STATUS_ACK) &&
1025             !is_multicast_ether_addr(hdr->addr1))
1026                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
1027
1028         if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) &&
1029             (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT))
1030                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
1031         else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS)
1032                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
1033
1034         rthdr->data_retries = status->retry_count;
1035
1036         read_lock(&local->sub_if_lock);
1037         monitors = local->monitors;
1038         list_for_each_entry(sdata, &local->sub_if_list, list) {
1039                 /*
1040                  * Using the monitors counter is possibly racy, but
1041                  * if the value is wrong we simply either clone the skb
1042                  * once too much or forget sending it to one monitor iface
1043                  * The latter case isn't nice but fixing the race is much
1044                  * more complicated.
1045                  */
1046                 if (!monitors || !skb)
1047                         goto out;
1048
1049                 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
1050                         if (!netif_running(sdata->dev))
1051                                 continue;
1052                         monitors--;
1053                         if (monitors)
1054                                 skb2 = skb_clone(skb, GFP_KERNEL);
1055                         else
1056                                 skb2 = NULL;
1057                         skb->dev = sdata->dev;
1058                         /* XXX: is this sufficient for BPF? */
1059                         skb_set_mac_header(skb, 0);
1060                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1061                         skb->pkt_type = PACKET_OTHERHOST;
1062                         skb->protocol = htons(ETH_P_802_2);
1063                         memset(skb->cb, 0, sizeof(skb->cb));
1064                         netif_rx(skb);
1065                         skb = skb2;
1066                 }
1067         }
1068  out:
1069         read_unlock(&local->sub_if_lock);
1070         if (skb)
1071                 dev_kfree_skb(skb);
1072 }
1073 EXPORT_SYMBOL(ieee80211_tx_status);
1074
1075 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
1076                                         const struct ieee80211_ops *ops)
1077 {
1078         struct net_device *mdev;
1079         struct ieee80211_local *local;
1080         struct ieee80211_sub_if_data *sdata;
1081         int priv_size;
1082         struct wiphy *wiphy;
1083
1084         /* Ensure 32-byte alignment of our private data and hw private data.
1085          * We use the wiphy priv data for both our ieee80211_local and for
1086          * the driver's private data
1087          *
1088          * In memory it'll be like this:
1089          *
1090          * +-------------------------+
1091          * | struct wiphy           |
1092          * +-------------------------+
1093          * | struct ieee80211_local  |
1094          * +-------------------------+
1095          * | driver's private data   |
1096          * +-------------------------+
1097          *
1098          */
1099         priv_size = ((sizeof(struct ieee80211_local) +
1100                       NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1101                     priv_data_len;
1102
1103         wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1104
1105         if (!wiphy)
1106                 return NULL;
1107
1108         wiphy->privid = mac80211_wiphy_privid;
1109
1110         local = wiphy_priv(wiphy);
1111         local->hw.wiphy = wiphy;
1112
1113         local->hw.priv = (char *)local +
1114                          ((sizeof(struct ieee80211_local) +
1115                            NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1116
1117         BUG_ON(!ops->tx);
1118         BUG_ON(!ops->start);
1119         BUG_ON(!ops->stop);
1120         BUG_ON(!ops->config);
1121         BUG_ON(!ops->add_interface);
1122         BUG_ON(!ops->remove_interface);
1123         BUG_ON(!ops->configure_filter);
1124         local->ops = ops;
1125
1126         /* for now, mdev needs sub_if_data :/ */
1127         mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
1128                             "wmaster%d", ether_setup);
1129         if (!mdev) {
1130                 wiphy_free(wiphy);
1131                 return NULL;
1132         }
1133
1134         sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
1135         mdev->ieee80211_ptr = &sdata->wdev;
1136         sdata->wdev.wiphy = wiphy;
1137
1138         local->hw.queues = 1; /* default */
1139
1140         local->mdev = mdev;
1141         local->rx_pre_handlers = ieee80211_rx_pre_handlers;
1142         local->rx_handlers = ieee80211_rx_handlers;
1143         local->tx_handlers = ieee80211_tx_handlers;
1144
1145         local->bridge_packets = 1;
1146
1147         local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1148         local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1149         local->short_retry_limit = 7;
1150         local->long_retry_limit = 4;
1151         local->hw.conf.radio_enabled = 1;
1152
1153         local->enabled_modes = ~0;
1154
1155         INIT_LIST_HEAD(&local->modes_list);
1156
1157         rwlock_init(&local->sub_if_lock);
1158         INIT_LIST_HEAD(&local->sub_if_list);
1159
1160         INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
1161         ieee80211_rx_bss_list_init(mdev);
1162
1163         sta_info_init(local);
1164
1165         mdev->hard_start_xmit = ieee80211_master_start_xmit;
1166         mdev->open = ieee80211_master_open;
1167         mdev->stop = ieee80211_master_stop;
1168         mdev->type = ARPHRD_IEEE80211;
1169         mdev->header_ops = &ieee80211_header_ops;
1170         mdev->set_multicast_list = ieee80211_master_set_multicast_list;
1171
1172         sdata->type = IEEE80211_IF_TYPE_AP;
1173         sdata->dev = mdev;
1174         sdata->local = local;
1175         sdata->u.ap.force_unicast_rateidx = -1;
1176         sdata->u.ap.max_ratectrl_rateidx = -1;
1177         ieee80211_if_sdata_init(sdata);
1178         list_add_tail(&sdata->list, &local->sub_if_list);
1179
1180         tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1181                      (unsigned long)local);
1182         tasklet_disable(&local->tx_pending_tasklet);
1183
1184         tasklet_init(&local->tasklet,
1185                      ieee80211_tasklet_handler,
1186                      (unsigned long) local);
1187         tasklet_disable(&local->tasklet);
1188
1189         skb_queue_head_init(&local->skb_queue);
1190         skb_queue_head_init(&local->skb_queue_unreliable);
1191
1192         return local_to_hw(local);
1193 }
1194 EXPORT_SYMBOL(ieee80211_alloc_hw);
1195
1196 int ieee80211_register_hw(struct ieee80211_hw *hw)
1197 {
1198         struct ieee80211_local *local = hw_to_local(hw);
1199         const char *name;
1200         int result;
1201
1202         result = wiphy_register(local->hw.wiphy);
1203         if (result < 0)
1204                 return result;
1205
1206         name = wiphy_dev(local->hw.wiphy)->driver->name;
1207         local->hw.workqueue = create_singlethread_workqueue(name);
1208         if (!local->hw.workqueue) {
1209                 result = -ENOMEM;
1210                 goto fail_workqueue;
1211         }
1212
1213         /*
1214          * The hardware needs headroom for sending the frame,
1215          * and we need some headroom for passing the frame to monitor
1216          * interfaces, but never both at the same time.
1217          */
1218         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1219                                    sizeof(struct ieee80211_tx_status_rtap_hdr));
1220
1221         debugfs_hw_add(local);
1222
1223         local->hw.conf.beacon_int = 1000;
1224
1225         local->wstats_flags |= local->hw.max_rssi ?
1226                                IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID;
1227         local->wstats_flags |= local->hw.max_signal ?
1228                                IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1229         local->wstats_flags |= local->hw.max_noise ?
1230                                IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1231         if (local->hw.max_rssi < 0 || local->hw.max_noise < 0)
1232                 local->wstats_flags |= IW_QUAL_DBM;
1233
1234         result = sta_info_start(local);
1235         if (result < 0)
1236                 goto fail_sta_info;
1237
1238         rtnl_lock();
1239         result = dev_alloc_name(local->mdev, local->mdev->name);
1240         if (result < 0)
1241                 goto fail_dev;
1242
1243         memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1244         SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1245
1246         result = register_netdevice(local->mdev);
1247         if (result < 0)
1248                 goto fail_dev;
1249
1250         ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1251
1252         result = ieee80211_init_rate_ctrl_alg(local, NULL);
1253         if (result < 0) {
1254                 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1255                        "algorithm\n", wiphy_name(local->hw.wiphy));
1256                 goto fail_rate;
1257         }
1258
1259         result = ieee80211_wep_init(local);
1260
1261         if (result < 0) {
1262                 printk(KERN_DEBUG "%s: Failed to initialize wep\n",
1263                        wiphy_name(local->hw.wiphy));
1264                 goto fail_wep;
1265         }
1266
1267         ieee80211_install_qdisc(local->mdev);
1268
1269         /* add one default STA interface */
1270         result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
1271                                   IEEE80211_IF_TYPE_STA);
1272         if (result)
1273                 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1274                        wiphy_name(local->hw.wiphy));
1275
1276         local->reg_state = IEEE80211_DEV_REGISTERED;
1277         rtnl_unlock();
1278
1279         ieee80211_led_init(local);
1280
1281         return 0;
1282
1283 fail_wep:
1284         rate_control_deinitialize(local);
1285 fail_rate:
1286         ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1287         unregister_netdevice(local->mdev);
1288 fail_dev:
1289         rtnl_unlock();
1290         sta_info_stop(local);
1291 fail_sta_info:
1292         debugfs_hw_del(local);
1293         destroy_workqueue(local->hw.workqueue);
1294 fail_workqueue:
1295         wiphy_unregister(local->hw.wiphy);
1296         return result;
1297 }
1298 EXPORT_SYMBOL(ieee80211_register_hw);
1299
1300 int ieee80211_register_hwmode(struct ieee80211_hw *hw,
1301                               struct ieee80211_hw_mode *mode)
1302 {
1303         struct ieee80211_local *local = hw_to_local(hw);
1304         struct ieee80211_rate *rate;
1305         int i;
1306
1307         INIT_LIST_HEAD(&mode->list);
1308         list_add_tail(&mode->list, &local->modes_list);
1309
1310         local->hw_modes |= (1 << mode->mode);
1311         for (i = 0; i < mode->num_rates; i++) {
1312                 rate = &(mode->rates[i]);
1313                 rate->rate_inv = CHAN_UTIL_RATE_LCM / rate->rate;
1314         }
1315         ieee80211_prepare_rates(local, mode);
1316
1317         if (!local->oper_hw_mode) {
1318                 /* Default to this mode */
1319                 local->hw.conf.phymode = mode->mode;
1320                 local->oper_hw_mode = local->scan_hw_mode = mode;
1321                 local->oper_channel = local->scan_channel = &mode->channels[0];
1322                 local->hw.conf.mode = local->oper_hw_mode;
1323                 local->hw.conf.chan = local->oper_channel;
1324         }
1325
1326         if (!(hw->flags & IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED))
1327                 ieee80211_set_default_regdomain(mode);
1328
1329         return 0;
1330 }
1331 EXPORT_SYMBOL(ieee80211_register_hwmode);
1332
1333 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1334 {
1335         struct ieee80211_local *local = hw_to_local(hw);
1336         struct ieee80211_sub_if_data *sdata, *tmp;
1337         struct list_head tmp_list;
1338         int i;
1339
1340         tasklet_kill(&local->tx_pending_tasklet);
1341         tasklet_kill(&local->tasklet);
1342
1343         rtnl_lock();
1344
1345         BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
1346
1347         local->reg_state = IEEE80211_DEV_UNREGISTERED;
1348         if (local->apdev)
1349                 ieee80211_if_del_mgmt(local);
1350
1351         write_lock_bh(&local->sub_if_lock);
1352         list_replace_init(&local->sub_if_list, &tmp_list);
1353         write_unlock_bh(&local->sub_if_lock);
1354
1355         list_for_each_entry_safe(sdata, tmp, &tmp_list, list)
1356                 __ieee80211_if_del(local, sdata);
1357
1358         rtnl_unlock();
1359
1360         ieee80211_rx_bss_list_deinit(local->mdev);
1361         ieee80211_clear_tx_pending(local);
1362         sta_info_stop(local);
1363         rate_control_deinitialize(local);
1364         debugfs_hw_del(local);
1365
1366         for (i = 0; i < NUM_IEEE80211_MODES; i++) {
1367                 kfree(local->supp_rates[i]);
1368                 kfree(local->basic_rates[i]);
1369         }
1370
1371         if (skb_queue_len(&local->skb_queue)
1372                         || skb_queue_len(&local->skb_queue_unreliable))
1373                 printk(KERN_WARNING "%s: skb_queue not empty\n",
1374                        wiphy_name(local->hw.wiphy));
1375         skb_queue_purge(&local->skb_queue);
1376         skb_queue_purge(&local->skb_queue_unreliable);
1377
1378         destroy_workqueue(local->hw.workqueue);
1379         wiphy_unregister(local->hw.wiphy);
1380         ieee80211_wep_free(local);
1381         ieee80211_led_exit(local);
1382 }
1383 EXPORT_SYMBOL(ieee80211_unregister_hw);
1384
1385 void ieee80211_free_hw(struct ieee80211_hw *hw)
1386 {
1387         struct ieee80211_local *local = hw_to_local(hw);
1388
1389         ieee80211_if_free(local->mdev);
1390         wiphy_free(local->hw.wiphy);
1391 }
1392 EXPORT_SYMBOL(ieee80211_free_hw);
1393
1394 static int __init ieee80211_init(void)
1395 {
1396         struct sk_buff *skb;
1397         int ret;
1398
1399         BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb));
1400
1401         ret = ieee80211_wme_register();
1402         if (ret) {
1403                 printk(KERN_DEBUG "ieee80211_init: failed to "
1404                        "initialize WME (err=%d)\n", ret);
1405                 return ret;
1406         }
1407
1408         ieee80211_debugfs_netdev_init();
1409         ieee80211_regdomain_init();
1410
1411         return 0;
1412 }
1413
1414 static void __exit ieee80211_exit(void)
1415 {
1416         ieee80211_wme_unregister();
1417         ieee80211_debugfs_netdev_exit();
1418 }
1419
1420
1421 subsys_initcall(ieee80211_init);
1422 module_exit(ieee80211_exit);
1423
1424 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1425 MODULE_LICENSE("GPL");