git.oblomov.eu Git - linux-2.6/blob - net/mac80211/ieee80211.c

   1 /*
   2  * Copyright 2002-2005, Instant802 Networks, Inc.
   3  * Copyright 2005-2006, Devicescape Software, Inc.
   4  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #include <net/mac80211.h>
  12 #include <net/ieee80211_radiotap.h>
  13 #include <linux/module.h>
  14 #include <linux/init.h>
  15 #include <linux/netdevice.h>
  16 #include <linux/types.h>
  17 #include <linux/slab.h>
  18 #include <linux/skbuff.h>
  19 #include <linux/etherdevice.h>
  20 #include <linux/if_arp.h>
  21 #include <linux/wireless.h>
  22 #include <linux/rtnetlink.h>
  23 #include <linux/bitmap.h>
  24 #include <net/cfg80211.h>
  25
  26 #include "ieee80211_common.h"
  27 #include "ieee80211_i.h"
  28 #include "ieee80211_rate.h"
  29 #include "wep.h"
  30 #include "wme.h"
  31 #include "aes_ccm.h"
  32 #include "ieee80211_led.h"
  33 #include "ieee80211_cfg.h"
  34 #include "debugfs.h"
  35 #include "debugfs_netdev.h"
  36
  37 /*
  38  * For seeing transmitted packets on monitor interfaces
  39  * we have a radiotap header too.
  40  */
  41 struct ieee80211_tx_status_rtap_hdr {
  42         struct ieee80211_radiotap_header hdr;
  43         __le16 tx_flags;
  44         u8 data_retries;
  45 } __attribute__ ((packed));
  46
  47 /* common interface routines */
  48
  49 static struct net_device_stats *ieee80211_get_stats(struct net_device *dev)
  50 {
  51         struct ieee80211_sub_if_data *sdata;
  52         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
  53         return &(sdata->stats);
  54 }
  55
  56 static int header_parse_80211(struct sk_buff *skb, unsigned char *haddr)
  57 {
  58         memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
  59         return ETH_ALEN;
  60 }
  61
  62 /* master interface */
  63
  64 static int ieee80211_master_open(struct net_device *dev)
  65 {
  66         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
  67         struct ieee80211_sub_if_data *sdata;
  68         int res = -EOPNOTSUPP;
  69
  70         read_lock(&local->sub_if_lock);
  71         list_for_each_entry(sdata, &local->sub_if_list, list) {
  72                 if (sdata->dev != dev && netif_running(sdata->dev)) {
  73                         res = 0;
  74                         break;
  75                 }
  76         }
  77         read_unlock(&local->sub_if_lock);
  78         return res;
  79 }
  80
  81 static int ieee80211_master_stop(struct net_device *dev)
  82 {
  83         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
  84         struct ieee80211_sub_if_data *sdata;
  85
  86         read_lock(&local->sub_if_lock);
  87         list_for_each_entry(sdata, &local->sub_if_list, list)
  88                 if (sdata->dev != dev && netif_running(sdata->dev))
  89                         dev_close(sdata->dev);
  90         read_unlock(&local->sub_if_lock);
  91
  92         return 0;
  93 }
  94
  95 /* management interface */
  96
  97 static void
  98 ieee80211_fill_frame_info(struct ieee80211_local *local,
  99                           struct ieee80211_frame_info *fi,
 100                           struct ieee80211_rx_status *status)
 101 {
 102         if (status) {
 103                 struct timespec ts;
 104                 struct ieee80211_rate *rate;
 105
 106                 jiffies_to_timespec(jiffies, &ts);
 107                 fi->hosttime = cpu_to_be64((u64) ts.tv_sec * 1000000 +
 108                                            ts.tv_nsec / 1000);
 109                 fi->mactime = cpu_to_be64(status->mactime);
 110                 switch (status->phymode) {
 111                 case MODE_IEEE80211A:
 112                         fi->phytype = htonl(ieee80211_phytype_ofdm_dot11_a);
 113                         break;
 114                 case MODE_IEEE80211B:
 115                         fi->phytype = htonl(ieee80211_phytype_dsss_dot11_b);
 116                         break;
 117                 case MODE_IEEE80211G:
 118                         fi->phytype = htonl(ieee80211_phytype_pbcc_dot11_g);
 119                         break;
 120                 case MODE_ATHEROS_TURBO:
 121                         fi->phytype =
 122                                 htonl(ieee80211_phytype_dsss_dot11_turbo);
 123                         break;
 124                 default:
 125                         fi->phytype = htonl(0xAAAAAAAA);
 126                         break;
 127                 }
 128                 fi->channel = htonl(status->channel);
 129                 rate = ieee80211_get_rate(local, status->phymode,
 130                                           status->rate);
 131                 if (rate) {
 132                         fi->datarate = htonl(rate->rate);
 133                         if (rate->flags & IEEE80211_RATE_PREAMBLE2) {
 134                                 if (status->rate == rate->val)
 135                                         fi->preamble = htonl(2); /* long */
 136                                 else if (status->rate == rate->val2)
 137                                         fi->preamble = htonl(1); /* short */
 138                         } else
 139                                 fi->preamble = htonl(0);
 140                 } else {
 141                         fi->datarate = htonl(0);
 142                         fi->preamble = htonl(0);
 143                 }
 144
 145                 fi->antenna = htonl(status->antenna);
 146                 fi->priority = htonl(0xffffffff); /* no clue */
 147                 fi->ssi_type = htonl(ieee80211_ssi_raw);
 148                 fi->ssi_signal = htonl(status->ssi);
 149                 fi->ssi_noise = 0x00000000;
 150                 fi->encoding = 0;
 151         } else {
 152                 /* clear everything because we really don't know.
 153                  * the msg_type field isn't present on monitor frames
 154                  * so we don't know whether it will be present or not,
 155                  * but it's ok to not clear it since it'll be assigned
 156                  * anyway */
 157                 memset(fi, 0, sizeof(*fi) - sizeof(fi->msg_type));
 158
 159                 fi->ssi_type = htonl(ieee80211_ssi_none);
 160         }
 161         fi->version = htonl(IEEE80211_FI_VERSION);
 162         fi->length = cpu_to_be32(sizeof(*fi) - sizeof(fi->msg_type));
 163 }
 164
 165 /* this routine is actually not just for this, but also
 166  * for pushing fake 'management' frames into userspace.
 167  * it shall be replaced by a netlink-based system. */
 168 void
 169 ieee80211_rx_mgmt(struct ieee80211_local *local, struct sk_buff *skb,
 170                   struct ieee80211_rx_status *status, u32 msg_type)
 171 {
 172         struct ieee80211_frame_info *fi;
 173         const size_t hlen = sizeof(struct ieee80211_frame_info);
 174         struct ieee80211_sub_if_data *sdata;
 175
 176         skb->dev = local->apdev;
 177
 178         sdata = IEEE80211_DEV_TO_SUB_IF(local->apdev);
 179
 180         if (skb_headroom(skb) < hlen) {
 181                 I802_DEBUG_INC(local->rx_expand_skb_head);
 182                 if (pskb_expand_head(skb, hlen, 0, GFP_ATOMIC)) {
 183                         dev_kfree_skb(skb);
 184                         return;
 185                 }
 186         }
 187
 188         fi = (struct ieee80211_frame_info *) skb_push(skb, hlen);
 189
 190         ieee80211_fill_frame_info(local, fi, status);
 191         fi->msg_type = htonl(msg_type);
 192
 193         sdata->stats.rx_packets++;
 194         sdata->stats.rx_bytes += skb->len;
 195
 196         skb_set_mac_header(skb, 0);
 197         skb->ip_summed = CHECKSUM_UNNECESSARY;
 198         skb->pkt_type = PACKET_OTHERHOST;
 199         skb->protocol = htons(ETH_P_802_2);
 200         memset(skb->cb, 0, sizeof(skb->cb));
 201         netif_rx(skb);
 202 }
 203
 204 void ieee80211_key_threshold_notify(struct net_device *dev,
 205                                     struct ieee80211_key *key,
 206                                     struct sta_info *sta)
 207 {
 208         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 209         struct sk_buff *skb;
 210         struct ieee80211_msg_key_notification *msg;
 211
 212         /* if no one will get it anyway, don't even allocate it.
 213          * unlikely because this is only relevant for APs
 214          * where the device must be open... */
 215         if (unlikely(!local->apdev))
 216                 return;
 217
 218         skb = dev_alloc_skb(sizeof(struct ieee80211_frame_info) +
 219                             sizeof(struct ieee80211_msg_key_notification));
 220         if (!skb)
 221                 return;
 222
 223         skb_reserve(skb, sizeof(struct ieee80211_frame_info));
 224         msg = (struct ieee80211_msg_key_notification *)
 225                 skb_put(skb, sizeof(struct ieee80211_msg_key_notification));
 226         msg->tx_rx_count = key->tx_rx_count;
 227         memcpy(msg->ifname, dev->name, IFNAMSIZ);
 228         if (sta)
 229                 memcpy(msg->addr, sta->addr, ETH_ALEN);
 230         else
 231                 memset(msg->addr, 0xff, ETH_ALEN);
 232
 233         key->tx_rx_count = 0;
 234
 235         ieee80211_rx_mgmt(local, skb, NULL,
 236                           ieee80211_msg_key_threshold_notification);
 237 }
 238
 239 static int ieee80211_mgmt_open(struct net_device *dev)
 240 {
 241         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 242
 243         if (!netif_running(local->mdev))
 244                 return -EOPNOTSUPP;
 245         return 0;
 246 }
 247
 248 static int ieee80211_mgmt_stop(struct net_device *dev)
 249 {
 250         return 0;
 251 }
 252
 253 static int ieee80211_change_mtu_apdev(struct net_device *dev, int new_mtu)
 254 {
 255         /* FIX: what would be proper limits for MTU?
 256          * This interface uses 802.11 frames. */
 257         if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN) {
 258                 printk(KERN_WARNING "%s: invalid MTU %d\n",
 259                        dev->name, new_mtu);
 260                 return -EINVAL;
 261         }
 262
 263 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 264         printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
 265 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
 266         dev->mtu = new_mtu;
 267         return 0;
 268 }
 269
 270 void ieee80211_if_mgmt_setup(struct net_device *dev)
 271 {
 272         ether_setup(dev);
 273         dev->hard_start_xmit = ieee80211_mgmt_start_xmit;
 274         dev->change_mtu = ieee80211_change_mtu_apdev;
 275         dev->get_stats = ieee80211_get_stats;
 276         dev->open = ieee80211_mgmt_open;
 277         dev->stop = ieee80211_mgmt_stop;
 278         dev->type = ARPHRD_IEEE80211_PRISM;
 279         dev->hard_header_parse = header_parse_80211;
 280         dev->uninit = ieee80211_if_reinit;
 281         dev->destructor = ieee80211_if_free;
 282 }
 283
 284 /* regular interfaces */
 285
 286 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
 287 {
 288         /* FIX: what would be proper limits for MTU?
 289          * This interface uses 802.3 frames. */
 290         if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6) {
 291                 printk(KERN_WARNING "%s: invalid MTU %d\n",
 292                        dev->name, new_mtu);
 293                 return -EINVAL;
 294         }
 295
 296 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 297         printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
 298 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
 299         dev->mtu = new_mtu;
 300         return 0;
 301 }
 302
 303 static inline int identical_mac_addr_allowed(int type1, int type2)
 304 {
 305         return (type1 == IEEE80211_IF_TYPE_MNTR ||
 306                 type2 == IEEE80211_IF_TYPE_MNTR ||
 307                 (type1 == IEEE80211_IF_TYPE_AP &&
 308                  type2 == IEEE80211_IF_TYPE_WDS) ||
 309                 (type1 == IEEE80211_IF_TYPE_WDS &&
 310                  (type2 == IEEE80211_IF_TYPE_WDS ||
 311                   type2 == IEEE80211_IF_TYPE_AP)) ||
 312                 (type1 == IEEE80211_IF_TYPE_AP &&
 313                  type2 == IEEE80211_IF_TYPE_VLAN) ||
 314                 (type1 == IEEE80211_IF_TYPE_VLAN &&
 315                  (type2 == IEEE80211_IF_TYPE_AP ||
 316                   type2 == IEEE80211_IF_TYPE_VLAN)));
 317 }
 318
 319 /* Check if running monitor interfaces should go to a "soft monitor" mode
 320  * and switch them if necessary. */
 321 static inline void ieee80211_start_soft_monitor(struct ieee80211_local *local)
 322 {
 323         struct ieee80211_if_init_conf conf;
 324
 325         if (local->open_count && local->open_count == local->monitors &&
 326             !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER) &&
 327             local->ops->remove_interface) {
 328                 conf.if_id = -1;
 329                 conf.type = IEEE80211_IF_TYPE_MNTR;
 330                 conf.mac_addr = NULL;
 331                 local->ops->remove_interface(local_to_hw(local), &conf);
 332         }
 333 }
 334
 335 /* Check if running monitor interfaces should go to a "hard monitor" mode
 336  * and switch them if necessary. */
 337 static void ieee80211_start_hard_monitor(struct ieee80211_local *local)
 338 {
 339         struct ieee80211_if_init_conf conf;
 340
 341         if (local->open_count && local->open_count == local->monitors &&
 342             !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
 343                 conf.if_id = -1;
 344                 conf.type = IEEE80211_IF_TYPE_MNTR;
 345                 conf.mac_addr = NULL;
 346                 local->ops->add_interface(local_to_hw(local), &conf);
 347         }
 348 }
 349
 350 static void ieee80211_if_open(struct net_device *dev)
 351 {
 352         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 353
 354         switch (sdata->type) {
 355         case IEEE80211_IF_TYPE_STA:
 356         case IEEE80211_IF_TYPE_IBSS:
 357                 sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
 358                 break;
 359         }
 360 }
 361
 362 static int ieee80211_open(struct net_device *dev)
 363 {
 364         struct ieee80211_sub_if_data *sdata, *nsdata;
 365         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 366         struct ieee80211_if_init_conf conf;
 367         int res;
 368
 369         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 370         read_lock(&local->sub_if_lock);
 371         list_for_each_entry(nsdata, &local->sub_if_list, list) {
 372                 struct net_device *ndev = nsdata->dev;
 373
 374                 if (ndev != dev && ndev != local->mdev && netif_running(ndev) &&
 375                     compare_ether_addr(dev->dev_addr, ndev->dev_addr) == 0 &&
 376                     !identical_mac_addr_allowed(sdata->type, nsdata->type)) {
 377                         read_unlock(&local->sub_if_lock);
 378                         return -ENOTUNIQ;
 379                 }
 380         }
 381         read_unlock(&local->sub_if_lock);
 382
 383         if (sdata->type == IEEE80211_IF_TYPE_WDS &&
 384             is_zero_ether_addr(sdata->u.wds.remote_addr))
 385                 return -ENOLINK;
 386
 387         if (sdata->type == IEEE80211_IF_TYPE_MNTR && local->open_count &&
 388             !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
 389                 /* run the interface in a "soft monitor" mode */
 390                 local->monitors++;
 391                 local->open_count++;
 392                 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
 393                 return 0;
 394         }
 395         ieee80211_if_open(dev);
 396         ieee80211_start_soft_monitor(local);
 397
 398         conf.if_id = dev->ifindex;
 399         conf.type = sdata->type;
 400         if (sdata->type == IEEE80211_IF_TYPE_MNTR)
 401                 conf.mac_addr = NULL;
 402         else
 403                 conf.mac_addr = dev->dev_addr;
 404         res = local->ops->add_interface(local_to_hw(local), &conf);
 405         if (res) {
 406                 if (sdata->type == IEEE80211_IF_TYPE_MNTR)
 407                         ieee80211_start_hard_monitor(local);
 408                 return res;
 409         }
 410
 411         if (local->open_count == 0) {
 412                 res = 0;
 413                 tasklet_enable(&local->tx_pending_tasklet);
 414                 tasklet_enable(&local->tasklet);
 415                 if (local->ops->open)
 416                         res = local->ops->open(local_to_hw(local));
 417                 if (res == 0) {
 418                         res = dev_open(local->mdev);
 419                         if (res) {
 420                                 if (local->ops->stop)
 421                                         local->ops->stop(local_to_hw(local));
 422                         } else {
 423                                 res = ieee80211_hw_config(local);
 424                                 if (res && local->ops->stop)
 425                                         local->ops->stop(local_to_hw(local));
 426                                 else if (!res && local->apdev)
 427                                         dev_open(local->apdev);
 428                         }
 429                 }
 430                 if (res) {
 431                         if (local->ops->remove_interface)
 432                                 local->ops->remove_interface(local_to_hw(local),
 433                                                             &conf);
 434                         return res;
 435                 }
 436         }
 437         local->open_count++;
 438
 439         if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
 440                 local->monitors++;
 441                 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
 442         } else {
 443                 ieee80211_if_config(dev);
 444                 ieee80211_reset_erp_info(dev);
 445                 ieee80211_enable_keys(sdata);
 446         }
 447
 448         if (sdata->type == IEEE80211_IF_TYPE_STA &&
 449             !local->user_space_mlme)
 450                 netif_carrier_off(dev);
 451         else
 452                 netif_carrier_on(dev);
 453
 454         netif_start_queue(dev);
 455         return 0;
 456 }
 457
 458 static void ieee80211_if_shutdown(struct net_device *dev)
 459 {
 460         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 461         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 462
 463         ASSERT_RTNL();
 464         switch (sdata->type) {
 465         case IEEE80211_IF_TYPE_STA:
 466         case IEEE80211_IF_TYPE_IBSS:
 467                 sdata->u.sta.state = IEEE80211_DISABLED;
 468                 del_timer_sync(&sdata->u.sta.timer);
 469                 /*
 470                  * Holding the sub_if_lock for writing here blocks
 471                  * out the receive path and makes sure it's not
 472                  * currently processing a packet that may get
 473                  * added to the queue.
 474                  */
 475                 write_lock_bh(&local->sub_if_lock);
 476                 skb_queue_purge(&sdata->u.sta.skb_queue);
 477                 write_unlock_bh(&local->sub_if_lock);
 478
 479                 if (!local->ops->hw_scan &&
 480                     local->scan_dev == sdata->dev) {
 481                         local->sta_scanning = 0;
 482                         cancel_delayed_work(&local->scan_work);
 483                 }
 484                 flush_workqueue(local->hw.workqueue);
 485                 break;
 486         }
 487 }
 488
 489 static int ieee80211_stop(struct net_device *dev)
 490 {
 491         struct ieee80211_sub_if_data *sdata;
 492         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 493
 494         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 495
 496         if (sdata->type == IEEE80211_IF_TYPE_MNTR &&
 497             local->open_count > 1 &&
 498             !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
 499                 /* remove "soft monitor" interface */
 500                 local->open_count--;
 501                 local->monitors--;
 502                 if (!local->monitors)
 503                         local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
 504                 return 0;
 505         }
 506
 507         netif_stop_queue(dev);
 508         ieee80211_if_shutdown(dev);
 509
 510         if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
 511                 local->monitors--;
 512                 if (!local->monitors)
 513                         local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
 514         } else {
 515                 /* disable all keys for as long as this netdev is down */
 516                 ieee80211_disable_keys(sdata);
 517         }
 518
 519         local->open_count--;
 520         if (local->open_count == 0) {
 521                 if (netif_running(local->mdev))
 522                         dev_close(local->mdev);
 523                 if (local->apdev)
 524                         dev_close(local->apdev);
 525                 if (local->ops->stop)
 526                         local->ops->stop(local_to_hw(local));
 527                 tasklet_disable(&local->tx_pending_tasklet);
 528                 tasklet_disable(&local->tasklet);
 529         }
 530         if (local->ops->remove_interface) {
 531                 struct ieee80211_if_init_conf conf;
 532
 533                 conf.if_id = dev->ifindex;
 534                 conf.type = sdata->type;
 535                 conf.mac_addr = dev->dev_addr;
 536                 local->ops->remove_interface(local_to_hw(local), &conf);
 537         }
 538
 539         ieee80211_start_hard_monitor(local);
 540
 541         return 0;
 542 }
 543
 544 enum netif_tx_lock_class {
 545         TX_LOCK_NORMAL,
 546         TX_LOCK_MASTER,
 547 };
 548
 549 static inline void netif_tx_lock_nested(struct net_device *dev, int subclass)
 550 {
 551         spin_lock_nested(&dev->_xmit_lock, subclass);
 552         dev->xmit_lock_owner = smp_processor_id();
 553 }
 554
 555 static void ieee80211_set_multicast_list(struct net_device *dev)
 556 {
 557         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 558         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 559         unsigned short flags;
 560
 561         netif_tx_lock_nested(local->mdev, TX_LOCK_MASTER);
 562         if (((dev->flags & IFF_ALLMULTI) != 0) ^
 563             ((sdata->flags & IEEE80211_SDATA_ALLMULTI) != 0)) {
 564                 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
 565                         local->iff_allmultis--;
 566                 else
 567                         local->iff_allmultis++;
 568                 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
 569         }
 570         if (((dev->flags & IFF_PROMISC) != 0) ^
 571             ((sdata->flags & IEEE80211_SDATA_PROMISC) != 0)) {
 572                 if (sdata->flags & IEEE80211_SDATA_PROMISC)
 573                         local->iff_promiscs--;
 574                 else
 575                         local->iff_promiscs++;
 576                 sdata->flags ^= IEEE80211_SDATA_PROMISC;
 577         }
 578         if (dev->mc_count != sdata->mc_count) {
 579                 local->mc_count = local->mc_count - sdata->mc_count +
 580                                   dev->mc_count;
 581                 sdata->mc_count = dev->mc_count;
 582         }
 583         if (local->ops->set_multicast_list) {
 584                 flags = local->mdev->flags;
 585                 if (local->iff_allmultis)
 586                         flags |= IFF_ALLMULTI;
 587                 if (local->iff_promiscs)
 588                         flags |= IFF_PROMISC;
 589                 read_lock(&local->sub_if_lock);
 590                 local->ops->set_multicast_list(local_to_hw(local), flags,
 591                                               local->mc_count);
 592                 read_unlock(&local->sub_if_lock);
 593         }
 594         netif_tx_unlock(local->mdev);
 595 }
 596
 597 /* Must not be called for mdev and apdev */
 598 void ieee80211_if_setup(struct net_device *dev)
 599 {
 600         ether_setup(dev);
 601         dev->hard_start_xmit = ieee80211_subif_start_xmit;
 602         dev->wireless_handlers = &ieee80211_iw_handler_def;
 603         dev->set_multicast_list = ieee80211_set_multicast_list;
 604         dev->change_mtu = ieee80211_change_mtu;
 605         dev->get_stats = ieee80211_get_stats;
 606         dev->open = ieee80211_open;
 607         dev->stop = ieee80211_stop;
 608         dev->uninit = ieee80211_if_reinit;
 609         dev->destructor = ieee80211_if_free;
 610 }
 611
 612 /* WDS specialties */
 613
 614 int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr)
 615 {
 616         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 617         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 618         struct sta_info *sta;
 619
 620         if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0)
 621                 return 0;
 622
 623         /* Create STA entry for the new peer */
 624         sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL);
 625         if (!sta)
 626                 return -ENOMEM;
 627         sta_info_put(sta);
 628
 629         /* Remove STA entry for the old peer */
 630         sta = sta_info_get(local, sdata->u.wds.remote_addr);
 631         if (sta) {
 632                 sta_info_free(sta);
 633                 sta_info_put(sta);
 634         } else {
 635                 printk(KERN_DEBUG "%s: could not find STA entry for WDS link "
 636                        "peer " MAC_FMT "\n",
 637                        dev->name, MAC_ARG(sdata->u.wds.remote_addr));
 638         }
 639
 640         /* Update WDS link data */
 641         memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN);
 642
 643         return 0;
 644 }
 645
 646 /* everything else */
 647
 648 static int __ieee80211_if_config(struct net_device *dev,
 649                                  struct sk_buff *beacon,
 650                                  struct ieee80211_tx_control *control)
 651 {
 652         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 653         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 654         struct ieee80211_if_conf conf;
 655         static u8 scan_bssid[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 656
 657         if (!local->ops->config_interface || !netif_running(dev))
 658                 return 0;
 659
 660         memset(&conf, 0, sizeof(conf));
 661         conf.type = sdata->type;
 662         if (sdata->type == IEEE80211_IF_TYPE_STA ||
 663             sdata->type == IEEE80211_IF_TYPE_IBSS) {
 664                 if (local->sta_scanning &&
 665                     local->scan_dev == dev)
 666                         conf.bssid = scan_bssid;
 667                 else
 668                         conf.bssid = sdata->u.sta.bssid;
 669                 conf.ssid = sdata->u.sta.ssid;
 670                 conf.ssid_len = sdata->u.sta.ssid_len;
 671                 conf.generic_elem = sdata->u.sta.extra_ie;
 672                 conf.generic_elem_len = sdata->u.sta.extra_ie_len;
 673         } else if (sdata->type == IEEE80211_IF_TYPE_AP) {
 674                 conf.ssid = sdata->u.ap.ssid;
 675                 conf.ssid_len = sdata->u.ap.ssid_len;
 676                 conf.generic_elem = sdata->u.ap.generic_elem;
 677                 conf.generic_elem_len = sdata->u.ap.generic_elem_len;
 678                 conf.beacon = beacon;
 679                 conf.beacon_control = control;
 680         }
 681         return local->ops->config_interface(local_to_hw(local),
 682                                            dev->ifindex, &conf);
 683 }
 684
 685 int ieee80211_if_config(struct net_device *dev)
 686 {
 687         return __ieee80211_if_config(dev, NULL, NULL);
 688 }
 689
 690 int ieee80211_if_config_beacon(struct net_device *dev)
 691 {
 692         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 693         struct ieee80211_tx_control control;
 694         struct sk_buff *skb;
 695
 696         if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
 697                 return 0;
 698         skb = ieee80211_beacon_get(local_to_hw(local), dev->ifindex, &control);
 699         if (!skb)
 700                 return -ENOMEM;
 701         return __ieee80211_if_config(dev, skb, &control);
 702 }
 703
 704 int ieee80211_hw_config(struct ieee80211_local *local)
 705 {
 706         struct ieee80211_hw_mode *mode;
 707         struct ieee80211_channel *chan;
 708         int ret = 0;
 709
 710         if (local->sta_scanning) {
 711                 chan = local->scan_channel;
 712                 mode = local->scan_hw_mode;
 713         } else {
 714                 chan = local->oper_channel;
 715                 mode = local->oper_hw_mode;
 716         }
 717
 718         local->hw.conf.channel = chan->chan;
 719         local->hw.conf.channel_val = chan->val;
 720         local->hw.conf.power_level = chan->power_level;
 721         local->hw.conf.freq = chan->freq;
 722         local->hw.conf.phymode = mode->mode;
 723         local->hw.conf.antenna_max = chan->antenna_max;
 724         local->hw.conf.chan = chan;
 725         local->hw.conf.mode = mode;
 726
 727 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 728         printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d "
 729                "phymode=%d\n", local->hw.conf.channel, local->hw.conf.freq,
 730                local->hw.conf.phymode);
 731 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
 732
 733         if (local->ops->config)
 734                 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
 735
 736         return ret;
 737 }
 738
 739 void ieee80211_erp_info_change_notify(struct net_device *dev, u8 changes)
 740 {
 741         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 742         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 743         if (local->ops->erp_ie_changed)
 744                 local->ops->erp_ie_changed(local_to_hw(local), changes,
 745                         !!(sdata->flags & IEEE80211_SDATA_USE_PROTECTION),
 746                         !(sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE));
 747 }
 748
 749 void ieee80211_reset_erp_info(struct net_device *dev)
 750 {
 751         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 752
 753         sdata->flags &= ~(IEEE80211_SDATA_USE_PROTECTION |
 754                         IEEE80211_SDATA_SHORT_PREAMBLE);
 755         ieee80211_erp_info_change_notify(dev,
 756                                          IEEE80211_ERP_CHANGE_PROTECTION |
 757                                          IEEE80211_ERP_CHANGE_PREAMBLE);
 758 }
 759
 760 struct dev_mc_list *ieee80211_get_mc_list_item(struct ieee80211_hw *hw,
 761                                                struct dev_mc_list *prev,
 762                                                void **ptr)
 763 {
 764         struct ieee80211_local *local = hw_to_local(hw);
 765         struct ieee80211_sub_if_data *sdata = *ptr;
 766         struct dev_mc_list *mc;
 767
 768         if (!prev) {
 769                 WARN_ON(sdata);
 770                 sdata = NULL;
 771         }
 772         if (!prev || !prev->next) {
 773                 if (sdata)
 774                         sdata = list_entry(sdata->list.next,
 775                                            struct ieee80211_sub_if_data, list);
 776                 else
 777                         sdata = list_entry(local->sub_if_list.next,
 778                                            struct ieee80211_sub_if_data, list);
 779                 if (&sdata->list != &local->sub_if_list)
 780                         mc = sdata->dev->mc_list;
 781                 else
 782                         mc = NULL;
 783         } else
 784                 mc = prev->next;
 785
 786         *ptr = sdata;
 787         return mc;
 788 }
 789 EXPORT_SYMBOL(ieee80211_get_mc_list_item);
 790
 791 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
 792                                  struct sk_buff *skb,
 793                                  struct ieee80211_tx_status *status)
 794 {
 795         struct ieee80211_local *local = hw_to_local(hw);
 796         struct ieee80211_tx_status *saved;
 797         int tmp;
 798
 799         skb->dev = local->mdev;
 800         saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC);
 801         if (unlikely(!saved)) {
 802                 if (net_ratelimit())
 803                         printk(KERN_WARNING "%s: Not enough memory, "
 804                                "dropping tx status", skb->dev->name);
 805                 /* should be dev_kfree_skb_irq, but due to this function being
 806                  * named _irqsafe instead of just _irq we can't be sure that
 807                  * people won't call it from non-irq contexts */
 808                 dev_kfree_skb_any(skb);
 809                 return;
 810         }
 811         memcpy(saved, status, sizeof(struct ieee80211_tx_status));
 812         /* copy pointer to saved status into skb->cb for use by tasklet */
 813         memcpy(skb->cb, &saved, sizeof(saved));
 814
 815         skb->pkt_type = IEEE80211_TX_STATUS_MSG;
 816         skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ?
 817                        &local->skb_queue : &local->skb_queue_unreliable, skb);
 818         tmp = skb_queue_len(&local->skb_queue) +
 819                 skb_queue_len(&local->skb_queue_unreliable);
 820         while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
 821                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 822                 memcpy(&saved, skb->cb, sizeof(saved));
 823                 kfree(saved);
 824                 dev_kfree_skb_irq(skb);
 825                 tmp--;
 826                 I802_DEBUG_INC(local->tx_status_drop);
 827         }
 828         tasklet_schedule(&local->tasklet);
 829 }
 830 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
 831
 832 static void ieee80211_tasklet_handler(unsigned long data)
 833 {
 834         struct ieee80211_local *local = (struct ieee80211_local *) data;
 835         struct sk_buff *skb;
 836         struct ieee80211_rx_status rx_status;
 837         struct ieee80211_tx_status *tx_status;
 838
 839         while ((skb = skb_dequeue(&local->skb_queue)) ||
 840                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 841                 switch (skb->pkt_type) {
 842                 case IEEE80211_RX_MSG:
 843                         /* status is in skb->cb */
 844                         memcpy(&rx_status, skb->cb, sizeof(rx_status));
 845                         /* Clear skb->type in order to not confuse kernel
 846                          * netstack. */
 847                         skb->pkt_type = 0;
 848                         __ieee80211_rx(local_to_hw(local), skb, &rx_status);
 849                         break;
 850                 case IEEE80211_TX_STATUS_MSG:
 851                         /* get pointer to saved status out of skb->cb */
 852                         memcpy(&tx_status, skb->cb, sizeof(tx_status));
 853                         skb->pkt_type = 0;
 854                         ieee80211_tx_status(local_to_hw(local),
 855                                             skb, tx_status);
 856                         kfree(tx_status);
 857                         break;
 858                 default: /* should never get here! */
 859                         printk(KERN_ERR "%s: Unknown message type (%d)\n",
 860                                local->mdev->name, skb->pkt_type);
 861                         dev_kfree_skb(skb);
 862                         break;
 863                 }
 864         }
 865 }
 866
 867 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
 868  * make a prepared TX frame (one that has been given to hw) to look like brand
 869  * new IEEE 802.11 frame that is ready to go through TX processing again.
 870  * Also, tx_packet_data in cb is restored from tx_control. */
 871 static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
 872                                       struct ieee80211_key *key,
 873                                       struct sk_buff *skb,
 874                                       struct ieee80211_tx_control *control)
 875 {
 876         int hdrlen, iv_len, mic_len;
 877         struct ieee80211_tx_packet_data *pkt_data;
 878
 879         pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
 880         pkt_data->ifindex = control->ifindex;
 881         pkt_data->flags = 0;
 882         if (control->flags & IEEE80211_TXCTL_REQ_TX_STATUS)
 883                 pkt_data->flags |= IEEE80211_TXPD_REQ_TX_STATUS;
 884         if (control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT)
 885                 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
 886         if (control->flags & IEEE80211_TXCTL_REQUEUE)
 887                 pkt_data->flags |= IEEE80211_TXPD_REQUEUE;
 888         if (control->type == IEEE80211_IF_TYPE_MGMT)
 889                 pkt_data->flags |= IEEE80211_TXPD_MGMT_IFACE;
 890         pkt_data->queue = control->queue;
 891
 892         hdrlen = ieee80211_get_hdrlen_from_skb(skb);
 893
 894         if (!key)
 895                 goto no_key;
 896
 897         switch (key->conf.alg) {
 898         case ALG_WEP:
 899                 iv_len = WEP_IV_LEN;
 900                 mic_len = WEP_ICV_LEN;
 901                 break;
 902         case ALG_TKIP:
 903                 iv_len = TKIP_IV_LEN;
 904                 mic_len = TKIP_ICV_LEN;
 905                 break;
 906         case ALG_CCMP:
 907                 iv_len = CCMP_HDR_LEN;
 908                 mic_len = CCMP_MIC_LEN;
 909                 break;
 910         default:
 911                 goto no_key;
 912         }
 913
 914         if (skb->len >= mic_len &&
 915             !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
 916                 skb_trim(skb, skb->len - mic_len);
 917         if (skb->len >= iv_len && skb->len > hdrlen) {
 918                 memmove(skb->data + iv_len, skb->data, hdrlen);
 919                 skb_pull(skb, iv_len);
 920         }
 921
 922 no_key:
 923         {
 924                 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 925                 u16 fc = le16_to_cpu(hdr->frame_control);
 926                 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
 927                         fc &= ~IEEE80211_STYPE_QOS_DATA;
 928                         hdr->frame_control = cpu_to_le16(fc);
 929                         memmove(skb->data + 2, skb->data, hdrlen - 2);
 930                         skb_pull(skb, 2);
 931                 }
 932         }
 933 }
 934
 935 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
 936                          struct ieee80211_tx_status *status)
 937 {
 938         struct sk_buff *skb2;
 939         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 940         struct ieee80211_local *local = hw_to_local(hw);
 941         u16 frag, type;
 942         u32 msg_type;
 943         struct ieee80211_tx_status_rtap_hdr *rthdr;
 944         struct ieee80211_sub_if_data *sdata;
 945         int monitors;
 946
 947         if (!status) {
 948                 printk(KERN_ERR
 949                        "%s: ieee80211_tx_status called with NULL status\n",
 950                        local->mdev->name);
 951                 dev_kfree_skb(skb);
 952                 return;
 953         }
 954
 955         if (status->excessive_retries) {
 956                 struct sta_info *sta;
 957                 sta = sta_info_get(local, hdr->addr1);
 958                 if (sta) {
 959                         if (sta->flags & WLAN_STA_PS) {
 960                                 /* The STA is in power save mode, so assume
 961                                  * that this TX packet failed because of that.
 962                                  */
 963                                 status->excessive_retries = 0;
 964                                 status->flags |= IEEE80211_TX_STATUS_TX_FILTERED;
 965                         }
 966                         sta_info_put(sta);
 967                 }
 968         }
 969
 970         if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
 971                 struct sta_info *sta;
 972                 sta = sta_info_get(local, hdr->addr1);
 973                 if (sta) {
 974                         sta->tx_filtered_count++;
 975
 976                         /* Clear the TX filter mask for this STA when sending
 977                          * the next packet. If the STA went to power save mode,
 978                          * this will happen when it is waking up for the next
 979                          * time. */
 980                         sta->clear_dst_mask = 1;
 981
 982                         /* TODO: Is the WLAN_STA_PS flag always set here or is
 983                          * the race between RX and TX status causing some
 984                          * packets to be filtered out before 80211.o gets an
 985                          * update for PS status? This seems to be the case, so
 986                          * no changes are likely to be needed. */
 987                         if (sta->flags & WLAN_STA_PS &&
 988                             skb_queue_len(&sta->tx_filtered) <
 989                             STA_MAX_TX_BUFFER) {
 990                                 ieee80211_remove_tx_extra(local, sta->key,
 991                                                           skb,
 992                                                           &status->control);
 993                                 skb_queue_tail(&sta->tx_filtered, skb);
 994                         } else if (!(sta->flags & WLAN_STA_PS) &&
 995                                    !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) {
 996                                 /* Software retry the packet once */
 997                                 status->control.flags |= IEEE80211_TXCTL_REQUEUE;
 998                                 ieee80211_remove_tx_extra(local, sta->key,
 999                                                           skb,
1000                                                           &status->control);
1001                                 dev_queue_xmit(skb);
1002                         } else {
1003                                 if (net_ratelimit()) {
1004                                         printk(KERN_DEBUG "%s: dropped TX "
1005                                                "filtered frame queue_len=%d "
1006                                                "PS=%d @%lu\n",
1007                                                local->mdev->name,
1008                                                skb_queue_len(
1009                                                        &sta->tx_filtered),
1010                                                !!(sta->flags & WLAN_STA_PS),
1011                                                jiffies);
1012                                 }
1013                                 dev_kfree_skb(skb);
1014                         }
1015                         sta_info_put(sta);
1016                         return;
1017                 }
1018         } else {
1019                 /* FIXME: STUPID to call this with both local and local->mdev */
1020                 rate_control_tx_status(local, local->mdev, skb, status);
1021         }
1022
1023         ieee80211_led_tx(local, 0);
1024
1025         /* SNMP counters
1026          * Fragments are passed to low-level drivers as separate skbs, so these
1027          * are actually fragments, not frames. Update frame counters only for
1028          * the first fragment of the frame. */
1029
1030         frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
1031         type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
1032
1033         if (status->flags & IEEE80211_TX_STATUS_ACK) {
1034                 if (frag == 0) {
1035                         local->dot11TransmittedFrameCount++;
1036                         if (is_multicast_ether_addr(hdr->addr1))
1037                                 local->dot11MulticastTransmittedFrameCount++;
1038                         if (status->retry_count > 0)
1039                                 local->dot11RetryCount++;
1040                         if (status->retry_count > 1)
1041                                 local->dot11MultipleRetryCount++;
1042                 }
1043
1044                 /* This counter shall be incremented for an acknowledged MPDU
1045                  * with an individual address in the address 1 field or an MPDU
1046                  * with a multicast address in the address 1 field of type Data
1047                  * or Management. */
1048                 if (!is_multicast_ether_addr(hdr->addr1) ||
1049                     type == IEEE80211_FTYPE_DATA ||
1050                     type == IEEE80211_FTYPE_MGMT)
1051                         local->dot11TransmittedFragmentCount++;
1052         } else {
1053                 if (frag == 0)
1054                         local->dot11FailedCount++;
1055         }
1056
1057         msg_type = (status->flags & IEEE80211_TX_STATUS_ACK) ?
1058                 ieee80211_msg_tx_callback_ack : ieee80211_msg_tx_callback_fail;
1059
1060         /* this was a transmitted frame, but now we want to reuse it */
1061         skb_orphan(skb);
1062
1063         if ((status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS) &&
1064             local->apdev) {
1065                 if (local->monitors) {
1066                         skb2 = skb_clone(skb, GFP_ATOMIC);
1067                 } else {
1068                         skb2 = skb;
1069                         skb = NULL;
1070                 }
1071
1072                 if (skb2)
1073                         /* Send frame to hostapd */
1074                         ieee80211_rx_mgmt(local, skb2, NULL, msg_type);
1075
1076                 if (!skb)
1077                         return;
1078         }
1079
1080         if (!local->monitors) {
1081                 dev_kfree_skb(skb);
1082                 return;
1083         }
1084
1085         /* send frame to monitor interfaces now */
1086
1087         if (skb_headroom(skb) < sizeof(*rthdr)) {
1088                 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
1089                 dev_kfree_skb(skb);
1090                 return;
1091         }
1092
1093         rthdr = (struct ieee80211_tx_status_rtap_hdr*)
1094                                 skb_push(skb, sizeof(*rthdr));
1095
1096         memset(rthdr, 0, sizeof(*rthdr));
1097         rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
1098         rthdr->hdr.it_present =
1099                 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
1100                             (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
1101
1102         if (!(status->flags & IEEE80211_TX_STATUS_ACK) &&
1103             !is_multicast_ether_addr(hdr->addr1))
1104                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
1105
1106         if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) &&
1107             (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT))
1108                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
1109         else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS)
1110                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
1111
1112         rthdr->data_retries = status->retry_count;
1113
1114         read_lock(&local->sub_if_lock);
1115         monitors = local->monitors;
1116         list_for_each_entry(sdata, &local->sub_if_list, list) {
1117                 /*
1118                  * Using the monitors counter is possibly racy, but
1119                  * if the value is wrong we simply either clone the skb
1120                  * once too much or forget sending it to one monitor iface
1121                  * The latter case isn't nice but fixing the race is much
1122                  * more complicated.
1123                  */
1124                 if (!monitors || !skb)
1125                         goto out;
1126
1127                 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
1128                         if (!netif_running(sdata->dev))
1129                                 continue;
1130                         monitors--;
1131                         if (monitors)
1132                                 skb2 = skb_clone(skb, GFP_KERNEL);
1133                         else
1134                                 skb2 = NULL;
1135                         skb->dev = sdata->dev;
1136                         /* XXX: is this sufficient for BPF? */
1137                         skb_set_mac_header(skb, 0);
1138                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1139                         skb->pkt_type = PACKET_OTHERHOST;
1140                         skb->protocol = htons(ETH_P_802_2);
1141                         memset(skb->cb, 0, sizeof(skb->cb));
1142                         netif_rx(skb);
1143                         skb = skb2;
1144                 }
1145         }
1146  out:
1147         read_unlock(&local->sub_if_lock);
1148         if (skb)
1149                 dev_kfree_skb(skb);
1150 }
1151 EXPORT_SYMBOL(ieee80211_tx_status);
1152
1153 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
1154                                         const struct ieee80211_ops *ops)
1155 {
1156         struct net_device *mdev;
1157         struct ieee80211_local *local;
1158         struct ieee80211_sub_if_data *sdata;
1159         int priv_size;
1160         struct wiphy *wiphy;
1161
1162         /* Ensure 32-byte alignment of our private data and hw private data.
1163          * We use the wiphy priv data for both our ieee80211_local and for
1164          * the driver's private data
1165          *
1166          * In memory it'll be like this:
1167          *
1168          * +-------------------------+
1169          * | struct wiphy           |
1170          * +-------------------------+
1171          * | struct ieee80211_local  |
1172          * +-------------------------+
1173          * | driver's private data   |
1174          * +-------------------------+
1175          *
1176          */
1177         priv_size = ((sizeof(struct ieee80211_local) +
1178                       NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1179                     priv_data_len;
1180
1181         wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1182
1183         if (!wiphy)
1184                 return NULL;
1185
1186         wiphy->privid = mac80211_wiphy_privid;
1187
1188         local = wiphy_priv(wiphy);
1189         local->hw.wiphy = wiphy;
1190
1191         local->hw.priv = (char *)local +
1192                          ((sizeof(struct ieee80211_local) +
1193                            NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1194
1195         BUG_ON(!ops->tx);
1196         BUG_ON(!ops->config);
1197         BUG_ON(!ops->add_interface);
1198         local->ops = ops;
1199
1200         /* for now, mdev needs sub_if_data :/ */
1201         mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
1202                             "wmaster%d", ether_setup);
1203         if (!mdev) {
1204                 wiphy_free(wiphy);
1205                 return NULL;
1206         }
1207
1208         sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
1209         mdev->ieee80211_ptr = &sdata->wdev;
1210         sdata->wdev.wiphy = wiphy;
1211
1212         local->hw.queues = 1; /* default */
1213
1214         local->mdev = mdev;
1215         local->rx_pre_handlers = ieee80211_rx_pre_handlers;
1216         local->rx_handlers = ieee80211_rx_handlers;
1217         local->tx_handlers = ieee80211_tx_handlers;
1218
1219         local->bridge_packets = 1;
1220
1221         local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1222         local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1223         local->short_retry_limit = 7;
1224         local->long_retry_limit = 4;
1225         local->hw.conf.radio_enabled = 1;
1226
1227         local->enabled_modes = (unsigned int) -1;
1228
1229         INIT_LIST_HEAD(&local->modes_list);
1230
1231         rwlock_init(&local->sub_if_lock);
1232         INIT_LIST_HEAD(&local->sub_if_list);
1233
1234         INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
1235         ieee80211_rx_bss_list_init(mdev);
1236
1237         sta_info_init(local);
1238
1239         mdev->hard_start_xmit = ieee80211_master_start_xmit;
1240         mdev->open = ieee80211_master_open;
1241         mdev->stop = ieee80211_master_stop;
1242         mdev->type = ARPHRD_IEEE80211;
1243         mdev->hard_header_parse = header_parse_80211;
1244
1245         sdata->type = IEEE80211_IF_TYPE_AP;
1246         sdata->dev = mdev;
1247         sdata->local = local;
1248         sdata->u.ap.force_unicast_rateidx = -1;
1249         sdata->u.ap.max_ratectrl_rateidx = -1;
1250         ieee80211_if_sdata_init(sdata);
1251         list_add_tail(&sdata->list, &local->sub_if_list);
1252
1253         tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1254                      (unsigned long)local);
1255         tasklet_disable(&local->tx_pending_tasklet);
1256
1257         tasklet_init(&local->tasklet,
1258                      ieee80211_tasklet_handler,
1259                      (unsigned long) local);
1260         tasklet_disable(&local->tasklet);
1261
1262         skb_queue_head_init(&local->skb_queue);
1263         skb_queue_head_init(&local->skb_queue_unreliable);
1264
1265         return local_to_hw(local);
1266 }
1267 EXPORT_SYMBOL(ieee80211_alloc_hw);
1268
1269 int ieee80211_register_hw(struct ieee80211_hw *hw)
1270 {
1271         struct ieee80211_local *local = hw_to_local(hw);
1272         const char *name;
1273         int result;
1274
1275         result = wiphy_register(local->hw.wiphy);
1276         if (result < 0)
1277                 return result;
1278
1279         name = wiphy_dev(local->hw.wiphy)->driver->name;
1280         local->hw.workqueue = create_singlethread_workqueue(name);
1281         if (!local->hw.workqueue) {
1282                 result = -ENOMEM;
1283                 goto fail_workqueue;
1284         }
1285
1286         /*
1287          * The hardware needs headroom for sending the frame,
1288          * and we need some headroom for passing the frame to monitor
1289          * interfaces, but never both at the same time.
1290          */
1291         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1292                                    sizeof(struct ieee80211_tx_status_rtap_hdr));
1293
1294         debugfs_hw_add(local);
1295
1296         local->hw.conf.beacon_int = 1000;
1297
1298         local->wstats_flags |= local->hw.max_rssi ?
1299                                IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID;
1300         local->wstats_flags |= local->hw.max_signal ?
1301                                IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1302         local->wstats_flags |= local->hw.max_noise ?
1303                                IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1304         if (local->hw.max_rssi < 0 || local->hw.max_noise < 0)
1305                 local->wstats_flags |= IW_QUAL_DBM;
1306
1307         result = sta_info_start(local);
1308         if (result < 0)
1309                 goto fail_sta_info;
1310
1311         rtnl_lock();
1312         result = dev_alloc_name(local->mdev, local->mdev->name);
1313         if (result < 0)
1314                 goto fail_dev;
1315
1316         memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1317         SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1318
1319         result = register_netdevice(local->mdev);
1320         if (result < 0)
1321                 goto fail_dev;
1322
1323         ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1324
1325         result = ieee80211_init_rate_ctrl_alg(local, NULL);
1326         if (result < 0) {
1327                 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1328                        "algorithm\n", local->mdev->name);
1329                 goto fail_rate;
1330         }
1331
1332         result = ieee80211_wep_init(local);
1333
1334         if (result < 0) {
1335                 printk(KERN_DEBUG "%s: Failed to initialize wep\n",
1336                        local->mdev->name);
1337                 goto fail_wep;
1338         }
1339
1340         ieee80211_install_qdisc(local->mdev);
1341
1342         /* add one default STA interface */
1343         result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
1344                                   IEEE80211_IF_TYPE_STA);
1345         if (result)
1346                 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1347                        local->mdev->name);
1348
1349         local->reg_state = IEEE80211_DEV_REGISTERED;
1350         rtnl_unlock();
1351
1352         ieee80211_led_init(local);
1353
1354         return 0;
1355
1356 fail_wep:
1357         rate_control_deinitialize(local);
1358 fail_rate:
1359         ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1360         unregister_netdevice(local->mdev);
1361 fail_dev:
1362         rtnl_unlock();
1363         sta_info_stop(local);
1364 fail_sta_info:
1365         debugfs_hw_del(local);
1366         destroy_workqueue(local->hw.workqueue);
1367 fail_workqueue:
1368         wiphy_unregister(local->hw.wiphy);
1369         return result;
1370 }
1371 EXPORT_SYMBOL(ieee80211_register_hw);
1372
1373 int ieee80211_register_hwmode(struct ieee80211_hw *hw,
1374                               struct ieee80211_hw_mode *mode)
1375 {
1376         struct ieee80211_local *local = hw_to_local(hw);
1377         struct ieee80211_rate *rate;
1378         int i;
1379
1380         INIT_LIST_HEAD(&mode->list);
1381         list_add_tail(&mode->list, &local->modes_list);
1382
1383         local->hw_modes |= (1 << mode->mode);
1384         for (i = 0; i < mode->num_rates; i++) {
1385                 rate = &(mode->rates[i]);
1386                 rate->rate_inv = CHAN_UTIL_RATE_LCM / rate->rate;
1387         }
1388         ieee80211_prepare_rates(local, mode);
1389
1390         if (!local->oper_hw_mode) {
1391                 /* Default to this mode */
1392                 local->hw.conf.phymode = mode->mode;
1393                 local->oper_hw_mode = local->scan_hw_mode = mode;
1394                 local->oper_channel = local->scan_channel = &mode->channels[0];
1395                 local->hw.conf.mode = local->oper_hw_mode;
1396                 local->hw.conf.chan = local->oper_channel;
1397         }
1398
1399         if (!(hw->flags & IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED))
1400                 ieee80211_set_default_regdomain(mode);
1401
1402         return 0;
1403 }
1404 EXPORT_SYMBOL(ieee80211_register_hwmode);
1405
1406 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1407 {
1408         struct ieee80211_local *local = hw_to_local(hw);
1409         struct ieee80211_sub_if_data *sdata, *tmp;
1410         struct list_head tmp_list;
1411         int i;
1412
1413         tasklet_kill(&local->tx_pending_tasklet);
1414         tasklet_kill(&local->tasklet);
1415
1416         rtnl_lock();
1417
1418         BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
1419
1420         local->reg_state = IEEE80211_DEV_UNREGISTERED;
1421         if (local->apdev)
1422                 ieee80211_if_del_mgmt(local);
1423
1424         write_lock_bh(&local->sub_if_lock);
1425         list_replace_init(&local->sub_if_list, &tmp_list);
1426         write_unlock_bh(&local->sub_if_lock);
1427
1428         list_for_each_entry_safe(sdata, tmp, &tmp_list, list)
1429                 __ieee80211_if_del(local, sdata);
1430
1431         rtnl_unlock();
1432
1433         ieee80211_rx_bss_list_deinit(local->mdev);
1434         ieee80211_clear_tx_pending(local);
1435         sta_info_stop(local);
1436         rate_control_deinitialize(local);
1437         debugfs_hw_del(local);
1438
1439         for (i = 0; i < NUM_IEEE80211_MODES; i++) {
1440                 kfree(local->supp_rates[i]);
1441                 kfree(local->basic_rates[i]);
1442         }
1443
1444         if (skb_queue_len(&local->skb_queue)
1445                         || skb_queue_len(&local->skb_queue_unreliable))
1446                 printk(KERN_WARNING "%s: skb_queue not empty\n",
1447                        local->mdev->name);
1448         skb_queue_purge(&local->skb_queue);
1449         skb_queue_purge(&local->skb_queue_unreliable);
1450
1451         destroy_workqueue(local->hw.workqueue);
1452         wiphy_unregister(local->hw.wiphy);
1453         ieee80211_wep_free(local);
1454         ieee80211_led_exit(local);
1455 }
1456 EXPORT_SYMBOL(ieee80211_unregister_hw);
1457
1458 void ieee80211_free_hw(struct ieee80211_hw *hw)
1459 {
1460         struct ieee80211_local *local = hw_to_local(hw);
1461
1462         ieee80211_if_free(local->mdev);
1463         wiphy_free(local->hw.wiphy);
1464 }
1465 EXPORT_SYMBOL(ieee80211_free_hw);
1466
1467 struct net_device_stats *ieee80211_dev_stats(struct net_device *dev)
1468 {
1469         struct ieee80211_sub_if_data *sdata;
1470         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1471         return &sdata->stats;
1472 }
1473
1474 static int __init ieee80211_init(void)
1475 {
1476         struct sk_buff *skb;
1477         int ret;
1478
1479         BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb));
1480
1481         ret = ieee80211_wme_register();
1482         if (ret) {
1483                 printk(KERN_DEBUG "ieee80211_init: failed to "
1484                        "initialize WME (err=%d)\n", ret);
1485                 return ret;
1486         }
1487
1488         ieee80211_debugfs_netdev_init();
1489         ieee80211_regdomain_init();
1490
1491         return 0;
1492 }
1493
1494 static void __exit ieee80211_exit(void)
1495 {
1496         ieee80211_wme_unregister();
1497         ieee80211_debugfs_netdev_exit();
1498 }
1499
1500
1501 subsys_initcall(ieee80211_init);
1502 module_exit(ieee80211_exit);
1503
1504 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1505 MODULE_LICENSE("GPL");