err.no Git - linux-2.6/blob - net/mac80211/ieee80211.c

   1 /*
   2  * Copyright 2002-2005, Instant802 Networks, Inc.
   3  * Copyright 2005-2006, Devicescape Software, Inc.
   4  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #include <net/mac80211.h>
  12 #include <net/ieee80211_radiotap.h>
  13 #include <linux/module.h>
  14 #include <linux/init.h>
  15 #include <linux/netdevice.h>
  16 #include <linux/types.h>
  17 #include <linux/slab.h>
  18 #include <linux/skbuff.h>
  19 #include <linux/etherdevice.h>
  20 #include <linux/if_arp.h>
  21 #include <linux/wireless.h>
  22 #include <linux/rtnetlink.h>
  23 #include <linux/bitmap.h>
  24 #include <net/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(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 /* master interface */
  57
  58 static int ieee80211_master_open(struct net_device *dev)
  59 {
  60         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
  61         struct ieee80211_sub_if_data *sdata;
  62         int res = -EOPNOTSUPP;
  63
  64         read_lock(&local->sub_if_lock);
  65         list_for_each_entry(sdata, &local->sub_if_list, list) {
  66                 if (sdata->dev != dev && netif_running(sdata->dev)) {
  67                         res = 0;
  68                         break;
  69                 }
  70         }
  71         read_unlock(&local->sub_if_lock);
  72         return res;
  73 }
  74
  75 static int ieee80211_master_stop(struct net_device *dev)
  76 {
  77         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
  78         struct ieee80211_sub_if_data *sdata;
  79
  80         read_lock(&local->sub_if_lock);
  81         list_for_each_entry(sdata, &local->sub_if_list, list)
  82                 if (sdata->dev != dev && netif_running(sdata->dev))
  83                         dev_close(sdata->dev);
  84         read_unlock(&local->sub_if_lock);
  85
  86         return 0;
  87 }
  88
  89 /* management interface */
  90
  91 static void
  92 ieee80211_fill_frame_info(struct ieee80211_local *local,
  93                           struct ieee80211_frame_info *fi,
  94                           struct ieee80211_rx_status *status)
  95 {
  96         if (status) {
  97                 struct timespec ts;
  98                 struct ieee80211_rate *rate;
  99
 100                 jiffies_to_timespec(jiffies, &ts);
 101                 fi->hosttime = cpu_to_be64((u64) ts.tv_sec * 1000000 +
 102                                            ts.tv_nsec / 1000);
 103                 fi->mactime = cpu_to_be64(status->mactime);
 104                 switch (status->phymode) {
 105                 case MODE_IEEE80211A:
 106                         fi->phytype = htonl(ieee80211_phytype_ofdm_dot11_a);
 107                         break;
 108                 case MODE_IEEE80211B:
 109                         fi->phytype = htonl(ieee80211_phytype_dsss_dot11_b);
 110                         break;
 111                 case MODE_IEEE80211G:
 112                         fi->phytype = htonl(ieee80211_phytype_pbcc_dot11_g);
 113                         break;
 114                 default:
 115                         fi->phytype = htonl(0xAAAAAAAA);
 116                         break;
 117                 }
 118                 fi->channel = htonl(status->channel);
 119                 rate = ieee80211_get_rate(local, status->phymode,
 120                                           status->rate);
 121                 if (rate) {
 122                         fi->datarate = htonl(rate->rate);
 123                         if (rate->flags & IEEE80211_RATE_PREAMBLE2) {
 124                                 if (status->rate == rate->val)
 125                                         fi->preamble = htonl(2); /* long */
 126                                 else if (status->rate == rate->val2)
 127                                         fi->preamble = htonl(1); /* short */
 128                         } else
 129                                 fi->preamble = htonl(0);
 130                 } else {
 131                         fi->datarate = htonl(0);
 132                         fi->preamble = htonl(0);
 133                 }
 134
 135                 fi->antenna = htonl(status->antenna);
 136                 fi->priority = htonl(0xffffffff); /* no clue */
 137                 fi->ssi_type = htonl(ieee80211_ssi_raw);
 138                 fi->ssi_signal = htonl(status->ssi);
 139                 fi->ssi_noise = 0x00000000;
 140                 fi->encoding = 0;
 141         } else {
 142                 /* clear everything because we really don't know.
 143                  * the msg_type field isn't present on monitor frames
 144                  * so we don't know whether it will be present or not,
 145                  * but it's ok to not clear it since it'll be assigned
 146                  * anyway */
 147                 memset(fi, 0, sizeof(*fi) - sizeof(fi->msg_type));
 148
 149                 fi->ssi_type = htonl(ieee80211_ssi_none);
 150         }
 151         fi->version = htonl(IEEE80211_FI_VERSION);
 152         fi->length = cpu_to_be32(sizeof(*fi) - sizeof(fi->msg_type));
 153 }
 154
 155 /* this routine is actually not just for this, but also
 156  * for pushing fake 'management' frames into userspace.
 157  * it shall be replaced by a netlink-based system. */
 158 void
 159 ieee80211_rx_mgmt(struct ieee80211_local *local, struct sk_buff *skb,
 160                   struct ieee80211_rx_status *status, u32 msg_type)
 161 {
 162         struct ieee80211_frame_info *fi;
 163         const size_t hlen = sizeof(struct ieee80211_frame_info);
 164         struct net_device *dev = local->apdev;
 165
 166         skb->dev = dev;
 167
 168         if (skb_headroom(skb) < hlen) {
 169                 I802_DEBUG_INC(local->rx_expand_skb_head);
 170                 if (pskb_expand_head(skb, hlen, 0, GFP_ATOMIC)) {
 171                         dev_kfree_skb(skb);
 172                         return;
 173                 }
 174         }
 175
 176         fi = (struct ieee80211_frame_info *) skb_push(skb, hlen);
 177
 178         ieee80211_fill_frame_info(local, fi, status);
 179         fi->msg_type = htonl(msg_type);
 180
 181         dev->stats.rx_packets++;
 182         dev->stats.rx_bytes += skb->len;
 183
 184         skb_set_mac_header(skb, 0);
 185         skb->ip_summed = CHECKSUM_UNNECESSARY;
 186         skb->pkt_type = PACKET_OTHERHOST;
 187         skb->protocol = htons(ETH_P_802_2);
 188         memset(skb->cb, 0, sizeof(skb->cb));
 189         netif_rx(skb);
 190 }
 191
 192 static int ieee80211_mgmt_open(struct net_device *dev)
 193 {
 194         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 195
 196         if (!netif_running(local->mdev))
 197                 return -EOPNOTSUPP;
 198         return 0;
 199 }
 200
 201 static int ieee80211_mgmt_stop(struct net_device *dev)
 202 {
 203         return 0;
 204 }
 205
 206 static int ieee80211_change_mtu_apdev(struct net_device *dev, int new_mtu)
 207 {
 208         /* FIX: what would be proper limits for MTU?
 209          * This interface uses 802.11 frames. */
 210         if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN) {
 211                 printk(KERN_WARNING "%s: invalid MTU %d\n",
 212                        dev->name, new_mtu);
 213                 return -EINVAL;
 214         }
 215
 216 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 217         printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
 218 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
 219         dev->mtu = new_mtu;
 220         return 0;
 221 }
 222
 223 void ieee80211_if_mgmt_setup(struct net_device *dev)
 224 {
 225         ether_setup(dev);
 226         dev->hard_start_xmit = ieee80211_mgmt_start_xmit;
 227         dev->change_mtu = ieee80211_change_mtu_apdev;
 228         dev->open = ieee80211_mgmt_open;
 229         dev->stop = ieee80211_mgmt_stop;
 230         dev->type = ARPHRD_IEEE80211_PRISM;
 231         dev->hard_header_parse = header_parse_80211;
 232         dev->uninit = ieee80211_if_reinit;
 233         dev->destructor = ieee80211_if_free;
 234 }
 235
 236 /* regular interfaces */
 237
 238 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
 239 {
 240         /* FIX: what would be proper limits for MTU?
 241          * This interface uses 802.3 frames. */
 242         if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6) {
 243                 printk(KERN_WARNING "%s: invalid MTU %d\n",
 244                        dev->name, new_mtu);
 245                 return -EINVAL;
 246         }
 247
 248 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 249         printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
 250 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
 251         dev->mtu = new_mtu;
 252         return 0;
 253 }
 254
 255 static inline int identical_mac_addr_allowed(int type1, int type2)
 256 {
 257         return (type1 == IEEE80211_IF_TYPE_MNTR ||
 258                 type2 == IEEE80211_IF_TYPE_MNTR ||
 259                 (type1 == IEEE80211_IF_TYPE_AP &&
 260                  type2 == IEEE80211_IF_TYPE_WDS) ||
 261                 (type1 == IEEE80211_IF_TYPE_WDS &&
 262                  (type2 == IEEE80211_IF_TYPE_WDS ||
 263                   type2 == IEEE80211_IF_TYPE_AP)) ||
 264                 (type1 == IEEE80211_IF_TYPE_AP &&
 265                  type2 == IEEE80211_IF_TYPE_VLAN) ||
 266                 (type1 == IEEE80211_IF_TYPE_VLAN &&
 267                  (type2 == IEEE80211_IF_TYPE_AP ||
 268                   type2 == IEEE80211_IF_TYPE_VLAN)));
 269 }
 270
 271 /* Check if running monitor interfaces should go to a "soft monitor" mode
 272  * and switch them if necessary. */
 273 static inline void ieee80211_start_soft_monitor(struct ieee80211_local *local)
 274 {
 275         struct ieee80211_if_init_conf conf;
 276
 277         if (local->open_count && local->open_count == local->monitors &&
 278             !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER) &&
 279             local->ops->remove_interface) {
 280                 conf.if_id = -1;
 281                 conf.type = IEEE80211_IF_TYPE_MNTR;
 282                 conf.mac_addr = NULL;
 283                 local->ops->remove_interface(local_to_hw(local), &conf);
 284         }
 285 }
 286
 287 /* Check if running monitor interfaces should go to a "hard monitor" mode
 288  * and switch them if necessary. */
 289 static void ieee80211_start_hard_monitor(struct ieee80211_local *local)
 290 {
 291         struct ieee80211_if_init_conf conf;
 292
 293         if (local->open_count && local->open_count == local->monitors &&
 294             !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
 295                 conf.if_id = -1;
 296                 conf.type = IEEE80211_IF_TYPE_MNTR;
 297                 conf.mac_addr = NULL;
 298                 local->ops->add_interface(local_to_hw(local), &conf);
 299         }
 300 }
 301
 302 static void ieee80211_if_open(struct net_device *dev)
 303 {
 304         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 305
 306         switch (sdata->type) {
 307         case IEEE80211_IF_TYPE_STA:
 308         case IEEE80211_IF_TYPE_IBSS:
 309                 sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
 310                 break;
 311         }
 312 }
 313
 314 static int ieee80211_open(struct net_device *dev)
 315 {
 316         struct ieee80211_sub_if_data *sdata, *nsdata;
 317         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 318         struct ieee80211_if_init_conf conf;
 319         int res;
 320
 321         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 322         read_lock(&local->sub_if_lock);
 323         list_for_each_entry(nsdata, &local->sub_if_list, list) {
 324                 struct net_device *ndev = nsdata->dev;
 325
 326                 if (ndev != dev && ndev != local->mdev && netif_running(ndev) &&
 327                     compare_ether_addr(dev->dev_addr, ndev->dev_addr) == 0 &&
 328                     !identical_mac_addr_allowed(sdata->type, nsdata->type)) {
 329                         read_unlock(&local->sub_if_lock);
 330                         return -ENOTUNIQ;
 331                 }
 332         }
 333         read_unlock(&local->sub_if_lock);
 334
 335         if (sdata->type == IEEE80211_IF_TYPE_WDS &&
 336             is_zero_ether_addr(sdata->u.wds.remote_addr))
 337                 return -ENOLINK;
 338
 339         if (sdata->type == IEEE80211_IF_TYPE_MNTR && local->open_count &&
 340             !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
 341                 /* run the interface in a "soft monitor" mode */
 342                 local->monitors++;
 343                 local->open_count++;
 344                 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
 345                 return 0;
 346         }
 347         ieee80211_if_open(dev);
 348         ieee80211_start_soft_monitor(local);
 349
 350         conf.if_id = dev->ifindex;
 351         conf.type = sdata->type;
 352         if (sdata->type == IEEE80211_IF_TYPE_MNTR)
 353                 conf.mac_addr = NULL;
 354         else
 355                 conf.mac_addr = dev->dev_addr;
 356         res = local->ops->add_interface(local_to_hw(local), &conf);
 357         if (res) {
 358                 if (sdata->type == IEEE80211_IF_TYPE_MNTR)
 359                         ieee80211_start_hard_monitor(local);
 360                 return res;
 361         }
 362
 363         if (local->open_count == 0) {
 364                 res = 0;
 365                 tasklet_enable(&local->tx_pending_tasklet);
 366                 tasklet_enable(&local->tasklet);
 367                 if (local->ops->open)
 368                         res = local->ops->open(local_to_hw(local));
 369                 if (res == 0) {
 370                         res = dev_open(local->mdev);
 371                         if (res) {
 372                                 if (local->ops->stop)
 373                                         local->ops->stop(local_to_hw(local));
 374                         } else {
 375                                 res = ieee80211_hw_config(local);
 376                                 if (res && local->ops->stop)
 377                                         local->ops->stop(local_to_hw(local));
 378                                 else if (!res && local->apdev)
 379                                         dev_open(local->apdev);
 380                         }
 381                 }
 382                 if (res) {
 383                         if (local->ops->remove_interface)
 384                                 local->ops->remove_interface(local_to_hw(local),
 385                                                             &conf);
 386                         return res;
 387                 }
 388         }
 389         local->open_count++;
 390
 391         if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
 392                 local->monitors++;
 393                 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
 394         } else {
 395                 ieee80211_if_config(dev);
 396                 ieee80211_reset_erp_info(dev);
 397                 ieee80211_enable_keys(sdata);
 398         }
 399
 400         if (sdata->type == IEEE80211_IF_TYPE_STA &&
 401             !local->user_space_mlme)
 402                 netif_carrier_off(dev);
 403         else
 404                 netif_carrier_on(dev);
 405
 406         netif_start_queue(dev);
 407         return 0;
 408 }
 409
 410 static void ieee80211_if_shutdown(struct net_device *dev)
 411 {
 412         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 413         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 414
 415         ASSERT_RTNL();
 416         switch (sdata->type) {
 417         case IEEE80211_IF_TYPE_STA:
 418         case IEEE80211_IF_TYPE_IBSS:
 419                 sdata->u.sta.state = IEEE80211_DISABLED;
 420                 del_timer_sync(&sdata->u.sta.timer);
 421                 /*
 422                  * Holding the sub_if_lock for writing here blocks
 423                  * out the receive path and makes sure it's not
 424                  * currently processing a packet that may get
 425                  * added to the queue.
 426                  */
 427                 write_lock_bh(&local->sub_if_lock);
 428                 skb_queue_purge(&sdata->u.sta.skb_queue);
 429                 write_unlock_bh(&local->sub_if_lock);
 430
 431                 if (!local->ops->hw_scan &&
 432                     local->scan_dev == sdata->dev) {
 433                         local->sta_scanning = 0;
 434                         cancel_delayed_work(&local->scan_work);
 435                 }
 436                 flush_workqueue(local->hw.workqueue);
 437                 break;
 438         }
 439 }
 440
 441 static int ieee80211_stop(struct net_device *dev)
 442 {
 443         struct ieee80211_sub_if_data *sdata;
 444         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 445
 446         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 447
 448         if (sdata->type == IEEE80211_IF_TYPE_MNTR &&
 449             local->open_count > 1 &&
 450             !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
 451                 /* remove "soft monitor" interface */
 452                 local->open_count--;
 453                 local->monitors--;
 454                 if (!local->monitors)
 455                         local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
 456                 return 0;
 457         }
 458
 459         netif_stop_queue(dev);
 460         ieee80211_if_shutdown(dev);
 461
 462         if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
 463                 local->monitors--;
 464                 if (!local->monitors)
 465                         local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
 466         } else {
 467                 /* disable all keys for as long as this netdev is down */
 468                 ieee80211_disable_keys(sdata);
 469         }
 470
 471         local->open_count--;
 472         if (local->open_count == 0) {
 473                 if (netif_running(local->mdev))
 474                         dev_close(local->mdev);
 475                 if (local->apdev)
 476                         dev_close(local->apdev);
 477                 if (local->ops->stop)
 478                         local->ops->stop(local_to_hw(local));
 479                 tasklet_disable(&local->tx_pending_tasklet);
 480                 tasklet_disable(&local->tasklet);
 481         }
 482         if (local->ops->remove_interface) {
 483                 struct ieee80211_if_init_conf conf;
 484
 485                 conf.if_id = dev->ifindex;
 486                 conf.type = sdata->type;
 487                 conf.mac_addr = dev->dev_addr;
 488                 local->ops->remove_interface(local_to_hw(local), &conf);
 489         }
 490
 491         ieee80211_start_hard_monitor(local);
 492
 493         return 0;
 494 }
 495
 496 enum netif_tx_lock_class {
 497         TX_LOCK_NORMAL,
 498         TX_LOCK_MASTER,
 499 };
 500
 501 static inline void netif_tx_lock_nested(struct net_device *dev, int subclass)
 502 {
 503         spin_lock_nested(&dev->_xmit_lock, subclass);
 504         dev->xmit_lock_owner = smp_processor_id();
 505 }
 506
 507 static void ieee80211_set_multicast_list(struct net_device *dev)
 508 {
 509         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 510         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 511         unsigned short flags;
 512
 513         netif_tx_lock_nested(local->mdev, TX_LOCK_MASTER);
 514         if (((dev->flags & IFF_ALLMULTI) != 0) ^
 515             ((sdata->flags & IEEE80211_SDATA_ALLMULTI) != 0)) {
 516                 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
 517                         local->iff_allmultis--;
 518                 else
 519                         local->iff_allmultis++;
 520                 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
 521         }
 522         if (((dev->flags & IFF_PROMISC) != 0) ^
 523             ((sdata->flags & IEEE80211_SDATA_PROMISC) != 0)) {
 524                 if (sdata->flags & IEEE80211_SDATA_PROMISC)
 525                         local->iff_promiscs--;
 526                 else
 527                         local->iff_promiscs++;
 528                 sdata->flags ^= IEEE80211_SDATA_PROMISC;
 529         }
 530         if (dev->mc_count != sdata->mc_count) {
 531                 local->mc_count = local->mc_count - sdata->mc_count +
 532                                   dev->mc_count;
 533                 sdata->mc_count = dev->mc_count;
 534         }
 535         if (local->ops->set_multicast_list) {
 536                 flags = local->mdev->flags;
 537                 if (local->iff_allmultis)
 538                         flags |= IFF_ALLMULTI;
 539                 if (local->iff_promiscs)
 540                         flags |= IFF_PROMISC;
 541                 read_lock(&local->sub_if_lock);
 542                 local->ops->set_multicast_list(local_to_hw(local), flags,
 543                                               local->mc_count);
 544                 read_unlock(&local->sub_if_lock);
 545         }
 546         netif_tx_unlock(local->mdev);
 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->hard_start_xmit = ieee80211_subif_start_xmit;
 554         dev->wireless_handlers = &ieee80211_iw_handler_def;
 555         dev->set_multicast_list = ieee80211_set_multicast_list;
 556         dev->change_mtu = ieee80211_change_mtu;
 557         dev->open = ieee80211_open;
 558         dev->stop = ieee80211_stop;
 559         dev->uninit = ieee80211_if_reinit;
 560         dev->destructor = ieee80211_if_free;
 561 }
 562
 563 /* WDS specialties */
 564
 565 int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr)
 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         struct sta_info *sta;
 570         DECLARE_MAC_BUF(mac);
 571
 572         if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0)
 573                 return 0;
 574
 575         /* Create STA entry for the new peer */
 576         sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL);
 577         if (!sta)
 578                 return -ENOMEM;
 579         sta_info_put(sta);
 580
 581         /* Remove STA entry for the old peer */
 582         sta = sta_info_get(local, sdata->u.wds.remote_addr);
 583         if (sta) {
 584                 sta_info_free(sta);
 585                 sta_info_put(sta);
 586         } else {
 587                 printk(KERN_DEBUG "%s: could not find STA entry for WDS link "
 588                        "peer %s\n",
 589                        dev->name, print_mac(mac, sdata->u.wds.remote_addr));
 590         }
 591
 592         /* Update WDS link data */
 593         memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN);
 594
 595         return 0;
 596 }
 597
 598 /* everything else */
 599
 600 static int __ieee80211_if_config(struct net_device *dev,
 601                                  struct sk_buff *beacon,
 602                                  struct ieee80211_tx_control *control)
 603 {
 604         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 605         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 606         struct ieee80211_if_conf conf;
 607         static u8 scan_bssid[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 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                 if (local->sta_scanning &&
 617                     local->scan_dev == dev)
 618                         conf.bssid = scan_bssid;
 619                 else
 620                         conf.bssid = sdata->u.sta.bssid;
 621                 conf.ssid = sdata->u.sta.ssid;
 622                 conf.ssid_len = sdata->u.sta.ssid_len;
 623                 conf.generic_elem = sdata->u.sta.extra_ie;
 624                 conf.generic_elem_len = sdata->u.sta.extra_ie_len;
 625         } else if (sdata->type == IEEE80211_IF_TYPE_AP) {
 626                 conf.ssid = sdata->u.ap.ssid;
 627                 conf.ssid_len = sdata->u.ap.ssid_len;
 628                 conf.generic_elem = sdata->u.ap.generic_elem;
 629                 conf.generic_elem_len = sdata->u.ap.generic_elem_len;
 630                 conf.beacon = beacon;
 631                 conf.beacon_control = control;
 632         }
 633         return local->ops->config_interface(local_to_hw(local),
 634                                            dev->ifindex, &conf);
 635 }
 636
 637 int ieee80211_if_config(struct net_device *dev)
 638 {
 639         return __ieee80211_if_config(dev, NULL, NULL);
 640 }
 641
 642 int ieee80211_if_config_beacon(struct net_device *dev)
 643 {
 644         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 645         struct ieee80211_tx_control control;
 646         struct sk_buff *skb;
 647
 648         if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
 649                 return 0;
 650         skb = ieee80211_beacon_get(local_to_hw(local), dev->ifindex, &control);
 651         if (!skb)
 652                 return -ENOMEM;
 653         return __ieee80211_if_config(dev, skb, &control);
 654 }
 655
 656 int ieee80211_hw_config(struct ieee80211_local *local)
 657 {
 658         struct ieee80211_hw_mode *mode;
 659         struct ieee80211_channel *chan;
 660         int ret = 0;
 661
 662         if (local->sta_scanning) {
 663                 chan = local->scan_channel;
 664                 mode = local->scan_hw_mode;
 665         } else {
 666                 chan = local->oper_channel;
 667                 mode = local->oper_hw_mode;
 668         }
 669
 670         local->hw.conf.channel = chan->chan;
 671         local->hw.conf.channel_val = chan->val;
 672         if (!local->hw.conf.power_level) {
 673                 local->hw.conf.power_level = chan->power_level;
 674         } else {
 675                 local->hw.conf.power_level = min(chan->power_level,
 676                                                  local->hw.conf.power_level);
 677         }
 678         local->hw.conf.freq = chan->freq;
 679         local->hw.conf.phymode = mode->mode;
 680         local->hw.conf.antenna_max = chan->antenna_max;
 681         local->hw.conf.chan = chan;
 682         local->hw.conf.mode = mode;
 683
 684 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 685         printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d "
 686                "phymode=%d\n", local->hw.conf.channel, local->hw.conf.freq,
 687                local->hw.conf.phymode);
 688 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
 689
 690         if (local->ops->config)
 691                 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
 692
 693         return ret;
 694 }
 695
 696 void ieee80211_erp_info_change_notify(struct net_device *dev, u8 changes)
 697 {
 698         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 699         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 700         if (local->ops->erp_ie_changed)
 701                 local->ops->erp_ie_changed(local_to_hw(local), changes,
 702                         !!(sdata->flags & IEEE80211_SDATA_USE_PROTECTION),
 703                         !(sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE));
 704 }
 705
 706 void ieee80211_reset_erp_info(struct net_device *dev)
 707 {
 708         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 709
 710         sdata->flags &= ~(IEEE80211_SDATA_USE_PROTECTION |
 711                         IEEE80211_SDATA_SHORT_PREAMBLE);
 712         ieee80211_erp_info_change_notify(dev,
 713                                          IEEE80211_ERP_CHANGE_PROTECTION |
 714                                          IEEE80211_ERP_CHANGE_PREAMBLE);
 715 }
 716
 717 struct dev_mc_list *ieee80211_get_mc_list_item(struct ieee80211_hw *hw,
 718                                                struct dev_mc_list *prev,
 719                                                void **ptr)
 720 {
 721         struct ieee80211_local *local = hw_to_local(hw);
 722         struct ieee80211_sub_if_data *sdata = *ptr;
 723         struct dev_mc_list *mc;
 724
 725         if (!prev) {
 726                 WARN_ON(sdata);
 727                 sdata = NULL;
 728         }
 729         if (!prev || !prev->next) {
 730                 if (sdata)
 731                         sdata = list_entry(sdata->list.next,
 732                                            struct ieee80211_sub_if_data, list);
 733                 else
 734                         sdata = list_entry(local->sub_if_list.next,
 735                                            struct ieee80211_sub_if_data, list);
 736                 if (&sdata->list != &local->sub_if_list)
 737                         mc = sdata->dev->mc_list;
 738                 else
 739                         mc = NULL;
 740         } else
 741                 mc = prev->next;
 742
 743         *ptr = sdata;
 744         return mc;
 745 }
 746 EXPORT_SYMBOL(ieee80211_get_mc_list_item);
 747
 748 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
 749                                  struct sk_buff *skb,
 750                                  struct ieee80211_tx_status *status)
 751 {
 752         struct ieee80211_local *local = hw_to_local(hw);
 753         struct ieee80211_tx_status *saved;
 754         int tmp;
 755
 756         skb->dev = local->mdev;
 757         saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC);
 758         if (unlikely(!saved)) {
 759                 if (net_ratelimit())
 760                         printk(KERN_WARNING "%s: Not enough memory, "
 761                                "dropping tx status", skb->dev->name);
 762                 /* should be dev_kfree_skb_irq, but due to this function being
 763                  * named _irqsafe instead of just _irq we can't be sure that
 764                  * people won't call it from non-irq contexts */
 765                 dev_kfree_skb_any(skb);
 766                 return;
 767         }
 768         memcpy(saved, status, sizeof(struct ieee80211_tx_status));
 769         /* copy pointer to saved status into skb->cb for use by tasklet */
 770         memcpy(skb->cb, &saved, sizeof(saved));
 771
 772         skb->pkt_type = IEEE80211_TX_STATUS_MSG;
 773         skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ?
 774                        &local->skb_queue : &local->skb_queue_unreliable, skb);
 775         tmp = skb_queue_len(&local->skb_queue) +
 776                 skb_queue_len(&local->skb_queue_unreliable);
 777         while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
 778                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 779                 memcpy(&saved, skb->cb, sizeof(saved));
 780                 kfree(saved);
 781                 dev_kfree_skb_irq(skb);
 782                 tmp--;
 783                 I802_DEBUG_INC(local->tx_status_drop);
 784         }
 785         tasklet_schedule(&local->tasklet);
 786 }
 787 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
 788
 789 static void ieee80211_tasklet_handler(unsigned long data)
 790 {
 791         struct ieee80211_local *local = (struct ieee80211_local *) data;
 792         struct sk_buff *skb;
 793         struct ieee80211_rx_status rx_status;
 794         struct ieee80211_tx_status *tx_status;
 795
 796         while ((skb = skb_dequeue(&local->skb_queue)) ||
 797                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 798                 switch (skb->pkt_type) {
 799                 case IEEE80211_RX_MSG:
 800                         /* status is in skb->cb */
 801                         memcpy(&rx_status, skb->cb, sizeof(rx_status));
 802                         /* Clear skb->type in order to not confuse kernel
 803                          * netstack. */
 804                         skb->pkt_type = 0;
 805                         __ieee80211_rx(local_to_hw(local), skb, &rx_status);
 806                         break;
 807                 case IEEE80211_TX_STATUS_MSG:
 808                         /* get pointer to saved status out of skb->cb */
 809                         memcpy(&tx_status, skb->cb, sizeof(tx_status));
 810                         skb->pkt_type = 0;
 811                         ieee80211_tx_status(local_to_hw(local),
 812                                             skb, tx_status);
 813                         kfree(tx_status);
 814                         break;
 815                 default: /* should never get here! */
 816                         printk(KERN_ERR "%s: Unknown message type (%d)\n",
 817                                wiphy_name(local->hw.wiphy), skb->pkt_type);
 818                         dev_kfree_skb(skb);
 819                         break;
 820                 }
 821         }
 822 }
 823
 824 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
 825  * make a prepared TX frame (one that has been given to hw) to look like brand
 826  * new IEEE 802.11 frame that is ready to go through TX processing again.
 827  * Also, tx_packet_data in cb is restored from tx_control. */
 828 static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
 829                                       struct ieee80211_key *key,
 830                                       struct sk_buff *skb,
 831                                       struct ieee80211_tx_control *control)
 832 {
 833         int hdrlen, iv_len, mic_len;
 834         struct ieee80211_tx_packet_data *pkt_data;
 835
 836         pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
 837         pkt_data->ifindex = control->ifindex;
 838         pkt_data->flags = 0;
 839         if (control->flags & IEEE80211_TXCTL_REQ_TX_STATUS)
 840                 pkt_data->flags |= IEEE80211_TXPD_REQ_TX_STATUS;
 841         if (control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT)
 842                 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
 843         if (control->flags & IEEE80211_TXCTL_REQUEUE)
 844                 pkt_data->flags |= IEEE80211_TXPD_REQUEUE;
 845         if (control->type == IEEE80211_IF_TYPE_MGMT)
 846                 pkt_data->flags |= IEEE80211_TXPD_MGMT_IFACE;
 847         pkt_data->queue = control->queue;
 848
 849         hdrlen = ieee80211_get_hdrlen_from_skb(skb);
 850
 851         if (!key)
 852                 goto no_key;
 853
 854         switch (key->conf.alg) {
 855         case ALG_WEP:
 856                 iv_len = WEP_IV_LEN;
 857                 mic_len = WEP_ICV_LEN;
 858                 break;
 859         case ALG_TKIP:
 860                 iv_len = TKIP_IV_LEN;
 861                 mic_len = TKIP_ICV_LEN;
 862                 break;
 863         case ALG_CCMP:
 864                 iv_len = CCMP_HDR_LEN;
 865                 mic_len = CCMP_MIC_LEN;
 866                 break;
 867         default:
 868                 goto no_key;
 869         }
 870
 871         if (skb->len >= mic_len &&
 872             !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
 873                 skb_trim(skb, skb->len - mic_len);
 874         if (skb->len >= iv_len && skb->len > hdrlen) {
 875                 memmove(skb->data + iv_len, skb->data, hdrlen);
 876                 skb_pull(skb, iv_len);
 877         }
 878
 879 no_key:
 880         {
 881                 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 882                 u16 fc = le16_to_cpu(hdr->frame_control);
 883                 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
 884                         fc &= ~IEEE80211_STYPE_QOS_DATA;
 885                         hdr->frame_control = cpu_to_le16(fc);
 886                         memmove(skb->data + 2, skb->data, hdrlen - 2);
 887                         skb_pull(skb, 2);
 888                 }
 889         }
 890 }
 891
 892 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
 893                          struct ieee80211_tx_status *status)
 894 {
 895         struct sk_buff *skb2;
 896         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 897         struct ieee80211_local *local = hw_to_local(hw);
 898         u16 frag, type;
 899         u32 msg_type;
 900         struct ieee80211_tx_status_rtap_hdr *rthdr;
 901         struct ieee80211_sub_if_data *sdata;
 902         int monitors;
 903
 904         if (!status) {
 905                 printk(KERN_ERR
 906                        "%s: ieee80211_tx_status called with NULL status\n",
 907                        wiphy_name(local->hw.wiphy));
 908                 dev_kfree_skb(skb);
 909                 return;
 910         }
 911
 912         if (status->excessive_retries) {
 913                 struct sta_info *sta;
 914                 sta = sta_info_get(local, hdr->addr1);
 915                 if (sta) {
 916                         if (sta->flags & WLAN_STA_PS) {
 917                                 /* The STA is in power save mode, so assume
 918                                  * that this TX packet failed because of that.
 919                                  */
 920                                 status->excessive_retries = 0;
 921                                 status->flags |= IEEE80211_TX_STATUS_TX_FILTERED;
 922                         }
 923                         sta_info_put(sta);
 924                 }
 925         }
 926
 927         if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
 928                 struct sta_info *sta;
 929                 sta = sta_info_get(local, hdr->addr1);
 930                 if (sta) {
 931                         sta->tx_filtered_count++;
 932
 933                         /* Clear the TX filter mask for this STA when sending
 934                          * the next packet. If the STA went to power save mode,
 935                          * this will happen when it is waking up for the next
 936                          * time. */
 937                         sta->clear_dst_mask = 1;
 938
 939                         /* TODO: Is the WLAN_STA_PS flag always set here or is
 940                          * the race between RX and TX status causing some
 941                          * packets to be filtered out before 80211.o gets an
 942                          * update for PS status? This seems to be the case, so
 943                          * no changes are likely to be needed. */
 944                         if (sta->flags & WLAN_STA_PS &&
 945                             skb_queue_len(&sta->tx_filtered) <
 946                             STA_MAX_TX_BUFFER) {
 947                                 ieee80211_remove_tx_extra(local, sta->key,
 948                                                           skb,
 949                                                           &status->control);
 950                                 skb_queue_tail(&sta->tx_filtered, skb);
 951                         } else if (!(sta->flags & WLAN_STA_PS) &&
 952                                    !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) {
 953                                 /* Software retry the packet once */
 954                                 status->control.flags |= IEEE80211_TXCTL_REQUEUE;
 955                                 ieee80211_remove_tx_extra(local, sta->key,
 956                                                           skb,
 957                                                           &status->control);
 958                                 dev_queue_xmit(skb);
 959                         } else {
 960                                 if (net_ratelimit()) {
 961                                         printk(KERN_DEBUG "%s: dropped TX "
 962                                                "filtered frame queue_len=%d "
 963                                                "PS=%d @%lu\n",
 964                                                wiphy_name(local->hw.wiphy),
 965                                                skb_queue_len(
 966                                                        &sta->tx_filtered),
 967                                                !!(sta->flags & WLAN_STA_PS),
 968                                                jiffies);
 969                                 }
 970                                 dev_kfree_skb(skb);
 971                         }
 972                         sta_info_put(sta);
 973                         return;
 974                 }
 975         } else {
 976                 /* FIXME: STUPID to call this with both local and local->mdev */
 977                 rate_control_tx_status(local, local->mdev, skb, status);
 978         }
 979
 980         ieee80211_led_tx(local, 0);
 981
 982         /* SNMP counters
 983          * Fragments are passed to low-level drivers as separate skbs, so these
 984          * are actually fragments, not frames. Update frame counters only for
 985          * the first fragment of the frame. */
 986
 987         frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
 988         type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
 989
 990         if (status->flags & IEEE80211_TX_STATUS_ACK) {
 991                 if (frag == 0) {
 992                         local->dot11TransmittedFrameCount++;
 993                         if (is_multicast_ether_addr(hdr->addr1))
 994                                 local->dot11MulticastTransmittedFrameCount++;
 995                         if (status->retry_count > 0)
 996                                 local->dot11RetryCount++;
 997                         if (status->retry_count > 1)
 998                                 local->dot11MultipleRetryCount++;
 999                 }
1000
1001                 /* This counter shall be incremented for an acknowledged MPDU
1002                  * with an individual address in the address 1 field or an MPDU
1003                  * with a multicast address in the address 1 field of type Data
1004                  * or Management. */
1005                 if (!is_multicast_ether_addr(hdr->addr1) ||
1006                     type == IEEE80211_FTYPE_DATA ||
1007                     type == IEEE80211_FTYPE_MGMT)
1008                         local->dot11TransmittedFragmentCount++;
1009         } else {
1010                 if (frag == 0)
1011                         local->dot11FailedCount++;
1012         }
1013
1014         msg_type = (status->flags & IEEE80211_TX_STATUS_ACK) ?
1015                 ieee80211_msg_tx_callback_ack : ieee80211_msg_tx_callback_fail;
1016
1017         /* this was a transmitted frame, but now we want to reuse it */
1018         skb_orphan(skb);
1019
1020         if ((status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS) &&
1021             local->apdev) {
1022                 if (local->monitors) {
1023                         skb2 = skb_clone(skb, GFP_ATOMIC);
1024                 } else {
1025                         skb2 = skb;
1026                         skb = NULL;
1027                 }
1028
1029                 if (skb2)
1030                         /* Send frame to hostapd */
1031                         ieee80211_rx_mgmt(local, skb2, NULL, msg_type);
1032
1033                 if (!skb)
1034                         return;
1035         }
1036
1037         if (!local->monitors) {
1038                 dev_kfree_skb(skb);
1039                 return;
1040         }
1041
1042         /* send frame to monitor interfaces now */
1043
1044         if (skb_headroom(skb) < sizeof(*rthdr)) {
1045                 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
1046                 dev_kfree_skb(skb);
1047                 return;
1048         }
1049
1050         rthdr = (struct ieee80211_tx_status_rtap_hdr*)
1051                                 skb_push(skb, sizeof(*rthdr));
1052
1053         memset(rthdr, 0, sizeof(*rthdr));
1054         rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
1055         rthdr->hdr.it_present =
1056                 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
1057                             (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
1058
1059         if (!(status->flags & IEEE80211_TX_STATUS_ACK) &&
1060             !is_multicast_ether_addr(hdr->addr1))
1061                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
1062
1063         if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) &&
1064             (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT))
1065                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
1066         else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS)
1067                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
1068
1069         rthdr->data_retries = status->retry_count;
1070
1071         read_lock(&local->sub_if_lock);
1072         monitors = local->monitors;
1073         list_for_each_entry(sdata, &local->sub_if_list, list) {
1074                 /*
1075                  * Using the monitors counter is possibly racy, but
1076                  * if the value is wrong we simply either clone the skb
1077                  * once too much or forget sending it to one monitor iface
1078                  * The latter case isn't nice but fixing the race is much
1079                  * more complicated.
1080                  */
1081                 if (!monitors || !skb)
1082                         goto out;
1083
1084                 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
1085                         if (!netif_running(sdata->dev))
1086                                 continue;
1087                         monitors--;
1088                         if (monitors)
1089                                 skb2 = skb_clone(skb, GFP_KERNEL);
1090                         else
1091                                 skb2 = NULL;
1092                         skb->dev = sdata->dev;
1093                         /* XXX: is this sufficient for BPF? */
1094                         skb_set_mac_header(skb, 0);
1095                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1096                         skb->pkt_type = PACKET_OTHERHOST;
1097                         skb->protocol = htons(ETH_P_802_2);
1098                         memset(skb->cb, 0, sizeof(skb->cb));
1099                         netif_rx(skb);
1100                         skb = skb2;
1101                 }
1102         }
1103  out:
1104         read_unlock(&local->sub_if_lock);
1105         if (skb)
1106                 dev_kfree_skb(skb);
1107 }
1108 EXPORT_SYMBOL(ieee80211_tx_status);
1109
1110 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
1111                                         const struct ieee80211_ops *ops)
1112 {
1113         struct net_device *mdev;
1114         struct ieee80211_local *local;
1115         struct ieee80211_sub_if_data *sdata;
1116         int priv_size;
1117         struct wiphy *wiphy;
1118
1119         /* Ensure 32-byte alignment of our private data and hw private data.
1120          * We use the wiphy priv data for both our ieee80211_local and for
1121          * the driver's private data
1122          *
1123          * In memory it'll be like this:
1124          *
1125          * +-------------------------+
1126          * | struct wiphy           |
1127          * +-------------------------+
1128          * | struct ieee80211_local  |
1129          * +-------------------------+
1130          * | driver's private data   |
1131          * +-------------------------+
1132          *
1133          */
1134         priv_size = ((sizeof(struct ieee80211_local) +
1135                       NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1136                     priv_data_len;
1137
1138         wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1139
1140         if (!wiphy)
1141                 return NULL;
1142
1143         wiphy->privid = mac80211_wiphy_privid;
1144
1145         local = wiphy_priv(wiphy);
1146         local->hw.wiphy = wiphy;
1147
1148         local->hw.priv = (char *)local +
1149                          ((sizeof(struct ieee80211_local) +
1150                            NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1151
1152         BUG_ON(!ops->tx);
1153         BUG_ON(!ops->config);
1154         BUG_ON(!ops->add_interface);
1155         local->ops = ops;
1156
1157         /* for now, mdev needs sub_if_data :/ */
1158         mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
1159                             "wmaster%d", ether_setup);
1160         if (!mdev) {
1161                 wiphy_free(wiphy);
1162                 return NULL;
1163         }
1164
1165         sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
1166         mdev->ieee80211_ptr = &sdata->wdev;
1167         sdata->wdev.wiphy = wiphy;
1168
1169         local->hw.queues = 1; /* default */
1170
1171         local->mdev = mdev;
1172         local->rx_pre_handlers = ieee80211_rx_pre_handlers;
1173         local->rx_handlers = ieee80211_rx_handlers;
1174         local->tx_handlers = ieee80211_tx_handlers;
1175
1176         local->bridge_packets = 1;
1177
1178         local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1179         local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1180         local->short_retry_limit = 7;
1181         local->long_retry_limit = 4;
1182         local->hw.conf.radio_enabled = 1;
1183
1184         local->enabled_modes = ~0;
1185
1186         INIT_LIST_HEAD(&local->modes_list);
1187
1188         rwlock_init(&local->sub_if_lock);
1189         INIT_LIST_HEAD(&local->sub_if_list);
1190
1191         INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
1192         ieee80211_rx_bss_list_init(mdev);
1193
1194         sta_info_init(local);
1195
1196         mdev->hard_start_xmit = ieee80211_master_start_xmit;
1197         mdev->open = ieee80211_master_open;
1198         mdev->stop = ieee80211_master_stop;
1199         mdev->type = ARPHRD_IEEE80211;
1200         mdev->hard_header_parse = header_parse_80211;
1201
1202         sdata->type = IEEE80211_IF_TYPE_AP;
1203         sdata->dev = mdev;
1204         sdata->local = local;
1205         sdata->u.ap.force_unicast_rateidx = -1;
1206         sdata->u.ap.max_ratectrl_rateidx = -1;
1207         ieee80211_if_sdata_init(sdata);
1208         list_add_tail(&sdata->list, &local->sub_if_list);
1209
1210         tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1211                      (unsigned long)local);
1212         tasklet_disable(&local->tx_pending_tasklet);
1213
1214         tasklet_init(&local->tasklet,
1215                      ieee80211_tasklet_handler,
1216                      (unsigned long) local);
1217         tasklet_disable(&local->tasklet);
1218
1219         skb_queue_head_init(&local->skb_queue);
1220         skb_queue_head_init(&local->skb_queue_unreliable);
1221
1222         return local_to_hw(local);
1223 }
1224 EXPORT_SYMBOL(ieee80211_alloc_hw);
1225
1226 int ieee80211_register_hw(struct ieee80211_hw *hw)
1227 {
1228         struct ieee80211_local *local = hw_to_local(hw);
1229         const char *name;
1230         int result;
1231
1232         result = wiphy_register(local->hw.wiphy);
1233         if (result < 0)
1234                 return result;
1235
1236         name = wiphy_dev(local->hw.wiphy)->driver->name;
1237         local->hw.workqueue = create_singlethread_workqueue(name);
1238         if (!local->hw.workqueue) {
1239                 result = -ENOMEM;
1240                 goto fail_workqueue;
1241         }
1242
1243         /*
1244          * The hardware needs headroom for sending the frame,
1245          * and we need some headroom for passing the frame to monitor
1246          * interfaces, but never both at the same time.
1247          */
1248         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1249                                    sizeof(struct ieee80211_tx_status_rtap_hdr));
1250
1251         debugfs_hw_add(local);
1252
1253         local->hw.conf.beacon_int = 1000;
1254
1255         local->wstats_flags |= local->hw.max_rssi ?
1256                                IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID;
1257         local->wstats_flags |= local->hw.max_signal ?
1258                                IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1259         local->wstats_flags |= local->hw.max_noise ?
1260                                IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1261         if (local->hw.max_rssi < 0 || local->hw.max_noise < 0)
1262                 local->wstats_flags |= IW_QUAL_DBM;
1263
1264         result = sta_info_start(local);
1265         if (result < 0)
1266                 goto fail_sta_info;
1267
1268         rtnl_lock();
1269         result = dev_alloc_name(local->mdev, local->mdev->name);
1270         if (result < 0)
1271                 goto fail_dev;
1272
1273         memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1274         SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1275
1276         result = register_netdevice(local->mdev);
1277         if (result < 0)
1278                 goto fail_dev;
1279
1280         ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1281
1282         result = ieee80211_init_rate_ctrl_alg(local, NULL);
1283         if (result < 0) {
1284                 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1285                        "algorithm\n", wiphy_name(local->hw.wiphy));
1286                 goto fail_rate;
1287         }
1288
1289         result = ieee80211_wep_init(local);
1290
1291         if (result < 0) {
1292                 printk(KERN_DEBUG "%s: Failed to initialize wep\n",
1293                        wiphy_name(local->hw.wiphy));
1294                 goto fail_wep;
1295         }
1296
1297         ieee80211_install_qdisc(local->mdev);
1298
1299         /* add one default STA interface */
1300         result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
1301                                   IEEE80211_IF_TYPE_STA);
1302         if (result)
1303                 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1304                        wiphy_name(local->hw.wiphy));
1305
1306         local->reg_state = IEEE80211_DEV_REGISTERED;
1307         rtnl_unlock();
1308
1309         ieee80211_led_init(local);
1310
1311         return 0;
1312
1313 fail_wep:
1314         rate_control_deinitialize(local);
1315 fail_rate:
1316         ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1317         unregister_netdevice(local->mdev);
1318 fail_dev:
1319         rtnl_unlock();
1320         sta_info_stop(local);
1321 fail_sta_info:
1322         debugfs_hw_del(local);
1323         destroy_workqueue(local->hw.workqueue);
1324 fail_workqueue:
1325         wiphy_unregister(local->hw.wiphy);
1326         return result;
1327 }
1328 EXPORT_SYMBOL(ieee80211_register_hw);
1329
1330 int ieee80211_register_hwmode(struct ieee80211_hw *hw,
1331                               struct ieee80211_hw_mode *mode)
1332 {
1333         struct ieee80211_local *local = hw_to_local(hw);
1334         struct ieee80211_rate *rate;
1335         int i;
1336
1337         INIT_LIST_HEAD(&mode->list);
1338         list_add_tail(&mode->list, &local->modes_list);
1339
1340         local->hw_modes |= (1 << mode->mode);
1341         for (i = 0; i < mode->num_rates; i++) {
1342                 rate = &(mode->rates[i]);
1343                 rate->rate_inv = CHAN_UTIL_RATE_LCM / rate->rate;
1344         }
1345         ieee80211_prepare_rates(local, mode);
1346
1347         if (!local->oper_hw_mode) {
1348                 /* Default to this mode */
1349                 local->hw.conf.phymode = mode->mode;
1350                 local->oper_hw_mode = local->scan_hw_mode = mode;
1351                 local->oper_channel = local->scan_channel = &mode->channels[0];
1352                 local->hw.conf.mode = local->oper_hw_mode;
1353                 local->hw.conf.chan = local->oper_channel;
1354         }
1355
1356         if (!(hw->flags & IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED))
1357                 ieee80211_set_default_regdomain(mode);
1358
1359         return 0;
1360 }
1361 EXPORT_SYMBOL(ieee80211_register_hwmode);
1362
1363 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1364 {
1365         struct ieee80211_local *local = hw_to_local(hw);
1366         struct ieee80211_sub_if_data *sdata, *tmp;
1367         struct list_head tmp_list;
1368         int i;
1369
1370         tasklet_kill(&local->tx_pending_tasklet);
1371         tasklet_kill(&local->tasklet);
1372
1373         rtnl_lock();
1374
1375         BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
1376
1377         local->reg_state = IEEE80211_DEV_UNREGISTERED;
1378         if (local->apdev)
1379                 ieee80211_if_del_mgmt(local);
1380
1381         write_lock_bh(&local->sub_if_lock);
1382         list_replace_init(&local->sub_if_list, &tmp_list);
1383         write_unlock_bh(&local->sub_if_lock);
1384
1385         list_for_each_entry_safe(sdata, tmp, &tmp_list, list)
1386                 __ieee80211_if_del(local, sdata);
1387
1388         rtnl_unlock();
1389
1390         ieee80211_rx_bss_list_deinit(local->mdev);
1391         ieee80211_clear_tx_pending(local);
1392         sta_info_stop(local);
1393         rate_control_deinitialize(local);
1394         debugfs_hw_del(local);
1395
1396         for (i = 0; i < NUM_IEEE80211_MODES; i++) {
1397                 kfree(local->supp_rates[i]);
1398                 kfree(local->basic_rates[i]);
1399         }
1400
1401         if (skb_queue_len(&local->skb_queue)
1402                         || skb_queue_len(&local->skb_queue_unreliable))
1403                 printk(KERN_WARNING "%s: skb_queue not empty\n",
1404                        wiphy_name(local->hw.wiphy));
1405         skb_queue_purge(&local->skb_queue);
1406         skb_queue_purge(&local->skb_queue_unreliable);
1407
1408         destroy_workqueue(local->hw.workqueue);
1409         wiphy_unregister(local->hw.wiphy);
1410         ieee80211_wep_free(local);
1411         ieee80211_led_exit(local);
1412 }
1413 EXPORT_SYMBOL(ieee80211_unregister_hw);
1414
1415 void ieee80211_free_hw(struct ieee80211_hw *hw)
1416 {
1417         struct ieee80211_local *local = hw_to_local(hw);
1418
1419         ieee80211_if_free(local->mdev);
1420         wiphy_free(local->hw.wiphy);
1421 }
1422 EXPORT_SYMBOL(ieee80211_free_hw);
1423
1424 static int __init ieee80211_init(void)
1425 {
1426         struct sk_buff *skb;
1427         int ret;
1428
1429         BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb));
1430
1431         ret = ieee80211_wme_register();
1432         if (ret) {
1433                 printk(KERN_DEBUG "ieee80211_init: failed to "
1434                        "initialize WME (err=%d)\n", ret);
1435                 return ret;
1436         }
1437
1438         ieee80211_debugfs_netdev_init();
1439         ieee80211_regdomain_init();
1440
1441         return 0;
1442 }
1443
1444 static void __exit ieee80211_exit(void)
1445 {
1446         ieee80211_wme_unregister();
1447         ieee80211_debugfs_netdev_exit();
1448 }
1449
1450
1451 subsys_initcall(ieee80211_init);
1452 module_exit(ieee80211_exit);
1453
1454 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1455 MODULE_LICENSE("GPL");