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 "ieee80211_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 struct net_device_stats *ieee80211_get_stats(struct net_device *dev)
  51 {
  52         struct ieee80211_sub_if_data *sdata;
  53         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
  54         return &(sdata->stats);
  55 }
  56
  57 static int header_parse_80211(struct sk_buff *skb, unsigned char *haddr)
  58 {
  59         memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
  60         return ETH_ALEN;
  61 }
  62
  63 /* master interface */
  64
  65 static int ieee80211_master_open(struct net_device *dev)
  66 {
  67         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
  68         struct ieee80211_sub_if_data *sdata;
  69         int res = -EOPNOTSUPP;
  70
  71         read_lock(&local->sub_if_lock);
  72         list_for_each_entry(sdata, &local->sub_if_list, list) {
  73                 if (sdata->dev != dev && netif_running(sdata->dev)) {
  74                         res = 0;
  75                         break;
  76                 }
  77         }
  78         read_unlock(&local->sub_if_lock);
  79         return res;
  80 }
  81
  82 static int ieee80211_master_stop(struct net_device *dev)
  83 {
  84         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
  85         struct ieee80211_sub_if_data *sdata;
  86
  87         read_lock(&local->sub_if_lock);
  88         list_for_each_entry(sdata, &local->sub_if_list, list)
  89                 if (sdata->dev != dev && netif_running(sdata->dev))
  90                         dev_close(sdata->dev);
  91         read_unlock(&local->sub_if_lock);
  92
  93         return 0;
  94 }
  95
  96 /* management interface */
  97
  98 static void
  99 ieee80211_fill_frame_info(struct ieee80211_local *local,
 100                           struct ieee80211_frame_info *fi,
 101                           struct ieee80211_rx_status *status)
 102 {
 103         if (status) {
 104                 struct timespec ts;
 105                 struct ieee80211_rate *rate;
 106
 107                 jiffies_to_timespec(jiffies, &ts);
 108                 fi->hosttime = cpu_to_be64((u64) ts.tv_sec * 1000000 +
 109                                            ts.tv_nsec / 1000);
 110                 fi->mactime = cpu_to_be64(status->mactime);
 111                 switch (status->phymode) {
 112                 case MODE_IEEE80211A:
 113                         fi->phytype = htonl(ieee80211_phytype_ofdm_dot11_a);
 114                         break;
 115                 case MODE_IEEE80211B:
 116                         fi->phytype = htonl(ieee80211_phytype_dsss_dot11_b);
 117                         break;
 118                 case MODE_IEEE80211G:
 119                         fi->phytype = htonl(ieee80211_phytype_pbcc_dot11_g);
 120                         break;
 121                 case MODE_ATHEROS_TURBO:
 122                         fi->phytype =
 123                                 htonl(ieee80211_phytype_dsss_dot11_turbo);
 124                         break;
 125                 default:
 126                         fi->phytype = htonl(0xAAAAAAAA);
 127                         break;
 128                 }
 129                 fi->channel = htonl(status->channel);
 130                 rate = ieee80211_get_rate(local, status->phymode,
 131                                           status->rate);
 132                 if (rate) {
 133                         fi->datarate = htonl(rate->rate);
 134                         if (rate->flags & IEEE80211_RATE_PREAMBLE2) {
 135                                 if (status->rate == rate->val)
 136                                         fi->preamble = htonl(2); /* long */
 137                                 else if (status->rate == rate->val2)
 138                                         fi->preamble = htonl(1); /* short */
 139                         } else
 140                                 fi->preamble = htonl(0);
 141                 } else {
 142                         fi->datarate = htonl(0);
 143                         fi->preamble = htonl(0);
 144                 }
 145
 146                 fi->antenna = htonl(status->antenna);
 147                 fi->priority = htonl(0xffffffff); /* no clue */
 148                 fi->ssi_type = htonl(ieee80211_ssi_raw);
 149                 fi->ssi_signal = htonl(status->ssi);
 150                 fi->ssi_noise = 0x00000000;
 151                 fi->encoding = 0;
 152         } else {
 153                 /* clear everything because we really don't know.
 154                  * the msg_type field isn't present on monitor frames
 155                  * so we don't know whether it will be present or not,
 156                  * but it's ok to not clear it since it'll be assigned
 157                  * anyway */
 158                 memset(fi, 0, sizeof(*fi) - sizeof(fi->msg_type));
 159
 160                 fi->ssi_type = htonl(ieee80211_ssi_none);
 161         }
 162         fi->version = htonl(IEEE80211_FI_VERSION);
 163         fi->length = cpu_to_be32(sizeof(*fi) - sizeof(fi->msg_type));
 164 }
 165
 166 /* this routine is actually not just for this, but also
 167  * for pushing fake 'management' frames into userspace.
 168  * it shall be replaced by a netlink-based system. */
 169 void
 170 ieee80211_rx_mgmt(struct ieee80211_local *local, struct sk_buff *skb,
 171                   struct ieee80211_rx_status *status, u32 msg_type)
 172 {
 173         struct ieee80211_frame_info *fi;
 174         const size_t hlen = sizeof(struct ieee80211_frame_info);
 175         struct ieee80211_sub_if_data *sdata;
 176
 177         skb->dev = local->apdev;
 178
 179         sdata = IEEE80211_DEV_TO_SUB_IF(local->apdev);
 180
 181         if (skb_headroom(skb) < hlen) {
 182                 I802_DEBUG_INC(local->rx_expand_skb_head);
 183                 if (pskb_expand_head(skb, hlen, 0, GFP_ATOMIC)) {
 184                         dev_kfree_skb(skb);
 185                         return;
 186                 }
 187         }
 188
 189         fi = (struct ieee80211_frame_info *) skb_push(skb, hlen);
 190
 191         ieee80211_fill_frame_info(local, fi, status);
 192         fi->msg_type = htonl(msg_type);
 193
 194         sdata->stats.rx_packets++;
 195         sdata->stats.rx_bytes += skb->len;
 196
 197         skb_set_mac_header(skb, 0);
 198         skb->ip_summed = CHECKSUM_UNNECESSARY;
 199         skb->pkt_type = PACKET_OTHERHOST;
 200         skb->protocol = htons(ETH_P_802_2);
 201         memset(skb->cb, 0, sizeof(skb->cb));
 202         netif_rx(skb);
 203 }
 204
 205 void ieee80211_key_threshold_notify(struct net_device *dev,
 206                                     struct ieee80211_key *key,
 207                                     struct sta_info *sta)
 208 {
 209         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 210         struct sk_buff *skb;
 211         struct ieee80211_msg_key_notification *msg;
 212
 213         /* if no one will get it anyway, don't even allocate it.
 214          * unlikely because this is only relevant for APs
 215          * where the device must be open... */
 216         if (unlikely(!local->apdev))
 217                 return;
 218
 219         skb = dev_alloc_skb(sizeof(struct ieee80211_frame_info) +
 220                             sizeof(struct ieee80211_msg_key_notification));
 221         if (!skb)
 222                 return;
 223
 224         skb_reserve(skb, sizeof(struct ieee80211_frame_info));
 225         msg = (struct ieee80211_msg_key_notification *)
 226                 skb_put(skb, sizeof(struct ieee80211_msg_key_notification));
 227         msg->tx_rx_count = key->tx_rx_count;
 228         memcpy(msg->ifname, dev->name, IFNAMSIZ);
 229         if (sta)
 230                 memcpy(msg->addr, sta->addr, ETH_ALEN);
 231         else
 232                 memset(msg->addr, 0xff, ETH_ALEN);
 233
 234         key->tx_rx_count = 0;
 235
 236         ieee80211_rx_mgmt(local, skb, NULL,
 237                           ieee80211_msg_key_threshold_notification);
 238 }
 239
 240 static int ieee80211_mgmt_open(struct net_device *dev)
 241 {
 242         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 243
 244         if (!netif_running(local->mdev))
 245                 return -EOPNOTSUPP;
 246         return 0;
 247 }
 248
 249 static int ieee80211_mgmt_stop(struct net_device *dev)
 250 {
 251         return 0;
 252 }
 253
 254 static int ieee80211_change_mtu_apdev(struct net_device *dev, int new_mtu)
 255 {
 256         /* FIX: what would be proper limits for MTU?
 257          * This interface uses 802.11 frames. */
 258         if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN) {
 259                 printk(KERN_WARNING "%s: invalid MTU %d\n",
 260                        dev->name, new_mtu);
 261                 return -EINVAL;
 262         }
 263
 264 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 265         printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
 266 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
 267         dev->mtu = new_mtu;
 268         return 0;
 269 }
 270
 271 void ieee80211_if_mgmt_setup(struct net_device *dev)
 272 {
 273         ether_setup(dev);
 274         dev->hard_start_xmit = ieee80211_mgmt_start_xmit;
 275         dev->change_mtu = ieee80211_change_mtu_apdev;
 276         dev->get_stats = ieee80211_get_stats;
 277         dev->open = ieee80211_mgmt_open;
 278         dev->stop = ieee80211_mgmt_stop;
 279         dev->type = ARPHRD_IEEE80211_PRISM;
 280         dev->hard_header_parse = header_parse_80211;
 281         dev->uninit = ieee80211_if_reinit;
 282         dev->destructor = ieee80211_if_free;
 283 }
 284
 285 /* regular interfaces */
 286
 287 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
 288 {
 289         /* FIX: what would be proper limits for MTU?
 290          * This interface uses 802.3 frames. */
 291         if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6) {
 292                 printk(KERN_WARNING "%s: invalid MTU %d\n",
 293                        dev->name, new_mtu);
 294                 return -EINVAL;
 295         }
 296
 297 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 298         printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
 299 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
 300         dev->mtu = new_mtu;
 301         return 0;
 302 }
 303
 304 static inline int identical_mac_addr_allowed(int type1, int type2)
 305 {
 306         return (type1 == IEEE80211_IF_TYPE_MNTR ||
 307                 type2 == IEEE80211_IF_TYPE_MNTR ||
 308                 (type1 == IEEE80211_IF_TYPE_AP &&
 309                  type2 == IEEE80211_IF_TYPE_WDS) ||
 310                 (type1 == IEEE80211_IF_TYPE_WDS &&
 311                  (type2 == IEEE80211_IF_TYPE_WDS ||
 312                   type2 == IEEE80211_IF_TYPE_AP)) ||
 313                 (type1 == IEEE80211_IF_TYPE_AP &&
 314                  type2 == IEEE80211_IF_TYPE_VLAN) ||
 315                 (type1 == IEEE80211_IF_TYPE_VLAN &&
 316                  (type2 == IEEE80211_IF_TYPE_AP ||
 317                   type2 == IEEE80211_IF_TYPE_VLAN)));
 318 }
 319
 320 /* Check if running monitor interfaces should go to a "soft monitor" mode
 321  * and switch them if necessary. */
 322 static inline void ieee80211_start_soft_monitor(struct ieee80211_local *local)
 323 {
 324         struct ieee80211_if_init_conf conf;
 325
 326         if (local->open_count && local->open_count == local->monitors &&
 327             !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER) &&
 328             local->ops->remove_interface) {
 329                 conf.if_id = -1;
 330                 conf.type = IEEE80211_IF_TYPE_MNTR;
 331                 conf.mac_addr = NULL;
 332                 local->ops->remove_interface(local_to_hw(local), &conf);
 333         }
 334 }
 335
 336 /* Check if running monitor interfaces should go to a "hard monitor" mode
 337  * and switch them if necessary. */
 338 static void ieee80211_start_hard_monitor(struct ieee80211_local *local)
 339 {
 340         struct ieee80211_if_init_conf conf;
 341
 342         if (local->open_count && local->open_count == local->monitors &&
 343             !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
 344                 conf.if_id = -1;
 345                 conf.type = IEEE80211_IF_TYPE_MNTR;
 346                 conf.mac_addr = NULL;
 347                 local->ops->add_interface(local_to_hw(local), &conf);
 348         }
 349 }
 350
 351 static void ieee80211_if_open(struct net_device *dev)
 352 {
 353         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 354
 355         switch (sdata->type) {
 356         case IEEE80211_IF_TYPE_STA:
 357         case IEEE80211_IF_TYPE_IBSS:
 358                 sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
 359                 break;
 360         }
 361 }
 362
 363 static int ieee80211_open(struct net_device *dev)
 364 {
 365         struct ieee80211_sub_if_data *sdata, *nsdata;
 366         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 367         struct ieee80211_if_init_conf conf;
 368         int res;
 369
 370         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 371         read_lock(&local->sub_if_lock);
 372         list_for_each_entry(nsdata, &local->sub_if_list, list) {
 373                 struct net_device *ndev = nsdata->dev;
 374
 375                 if (ndev != dev && ndev != local->mdev && netif_running(ndev) &&
 376                     compare_ether_addr(dev->dev_addr, ndev->dev_addr) == 0 &&
 377                     !identical_mac_addr_allowed(sdata->type, nsdata->type)) {
 378                         read_unlock(&local->sub_if_lock);
 379                         return -ENOTUNIQ;
 380                 }
 381         }
 382         read_unlock(&local->sub_if_lock);
 383
 384         if (sdata->type == IEEE80211_IF_TYPE_WDS &&
 385             is_zero_ether_addr(sdata->u.wds.remote_addr))
 386                 return -ENOLINK;
 387
 388         if (sdata->type == IEEE80211_IF_TYPE_MNTR && local->open_count &&
 389             !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
 390                 /* run the interface in a "soft monitor" mode */
 391                 local->monitors++;
 392                 local->open_count++;
 393                 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
 394                 return 0;
 395         }
 396         ieee80211_if_open(dev);
 397         ieee80211_start_soft_monitor(local);
 398
 399         conf.if_id = dev->ifindex;
 400         conf.type = sdata->type;
 401         if (sdata->type == IEEE80211_IF_TYPE_MNTR)
 402                 conf.mac_addr = NULL;
 403         else
 404                 conf.mac_addr = dev->dev_addr;
 405         res = local->ops->add_interface(local_to_hw(local), &conf);
 406         if (res) {
 407                 if (sdata->type == IEEE80211_IF_TYPE_MNTR)
 408                         ieee80211_start_hard_monitor(local);
 409                 return res;
 410         }
 411
 412         if (local->open_count == 0) {
 413                 res = 0;
 414                 tasklet_enable(&local->tx_pending_tasklet);
 415                 tasklet_enable(&local->tasklet);
 416                 if (local->ops->open)
 417                         res = local->ops->open(local_to_hw(local));
 418                 if (res == 0) {
 419                         res = dev_open(local->mdev);
 420                         if (res) {
 421                                 if (local->ops->stop)
 422                                         local->ops->stop(local_to_hw(local));
 423                         } else {
 424                                 res = ieee80211_hw_config(local);
 425                                 if (res && local->ops->stop)
 426                                         local->ops->stop(local_to_hw(local));
 427                                 else if (!res && local->apdev)
 428                                         dev_open(local->apdev);
 429                         }
 430                 }
 431                 if (res) {
 432                         if (local->ops->remove_interface)
 433                                 local->ops->remove_interface(local_to_hw(local),
 434                                                             &conf);
 435                         return res;
 436                 }
 437         }
 438         local->open_count++;
 439
 440         if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
 441                 local->monitors++;
 442                 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
 443         } else {
 444                 ieee80211_if_config(dev);
 445                 ieee80211_reset_erp_info(dev);
 446                 ieee80211_enable_keys(sdata);
 447         }
 448
 449         if (sdata->type == IEEE80211_IF_TYPE_STA &&
 450             !local->user_space_mlme)
 451                 netif_carrier_off(dev);
 452         else
 453                 netif_carrier_on(dev);
 454
 455         netif_start_queue(dev);
 456         return 0;
 457 }
 458
 459 static void ieee80211_if_shutdown(struct net_device *dev)
 460 {
 461         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 462         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 463
 464         ASSERT_RTNL();
 465         switch (sdata->type) {
 466         case IEEE80211_IF_TYPE_STA:
 467         case IEEE80211_IF_TYPE_IBSS:
 468                 sdata->u.sta.state = IEEE80211_DISABLED;
 469                 del_timer_sync(&sdata->u.sta.timer);
 470                 /*
 471                  * Holding the sub_if_lock for writing here blocks
 472                  * out the receive path and makes sure it's not
 473                  * currently processing a packet that may get
 474                  * added to the queue.
 475                  */
 476                 write_lock_bh(&local->sub_if_lock);
 477                 skb_queue_purge(&sdata->u.sta.skb_queue);
 478                 write_unlock_bh(&local->sub_if_lock);
 479
 480                 if (!local->ops->hw_scan &&
 481                     local->scan_dev == sdata->dev) {
 482                         local->sta_scanning = 0;
 483                         cancel_delayed_work(&local->scan_work);
 484                 }
 485                 flush_workqueue(local->hw.workqueue);
 486                 break;
 487         }
 488 }
 489
 490 static int ieee80211_stop(struct net_device *dev)
 491 {
 492         struct ieee80211_sub_if_data *sdata;
 493         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 494
 495         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 496
 497         if (sdata->type == IEEE80211_IF_TYPE_MNTR &&
 498             local->open_count > 1 &&
 499             !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
 500                 /* remove "soft monitor" interface */
 501                 local->open_count--;
 502                 local->monitors--;
 503                 if (!local->monitors)
 504                         local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
 505                 return 0;
 506         }
 507
 508         netif_stop_queue(dev);
 509         ieee80211_if_shutdown(dev);
 510
 511         if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
 512                 local->monitors--;
 513                 if (!local->monitors)
 514                         local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
 515         } else {
 516                 /* disable all keys for as long as this netdev is down */
 517                 ieee80211_disable_keys(sdata);
 518         }
 519
 520         local->open_count--;
 521         if (local->open_count == 0) {
 522                 if (netif_running(local->mdev))
 523                         dev_close(local->mdev);
 524                 if (local->apdev)
 525                         dev_close(local->apdev);
 526                 if (local->ops->stop)
 527                         local->ops->stop(local_to_hw(local));
 528                 tasklet_disable(&local->tx_pending_tasklet);
 529                 tasklet_disable(&local->tasklet);
 530         }
 531         if (local->ops->remove_interface) {
 532                 struct ieee80211_if_init_conf conf;
 533
 534                 conf.if_id = dev->ifindex;
 535                 conf.type = sdata->type;
 536                 conf.mac_addr = dev->dev_addr;
 537                 local->ops->remove_interface(local_to_hw(local), &conf);
 538         }
 539
 540         ieee80211_start_hard_monitor(local);
 541
 542         return 0;
 543 }
 544
 545 enum netif_tx_lock_class {
 546         TX_LOCK_NORMAL,
 547         TX_LOCK_MASTER,
 548 };
 549
 550 static inline void netif_tx_lock_nested(struct net_device *dev, int subclass)
 551 {
 552         spin_lock_nested(&dev->_xmit_lock, subclass);
 553         dev->xmit_lock_owner = smp_processor_id();
 554 }
 555
 556 static void ieee80211_set_multicast_list(struct net_device *dev)
 557 {
 558         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 559         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 560         unsigned short flags;
 561
 562         netif_tx_lock_nested(local->mdev, TX_LOCK_MASTER);
 563         if (((dev->flags & IFF_ALLMULTI) != 0) ^
 564             ((sdata->flags & IEEE80211_SDATA_ALLMULTI) != 0)) {
 565                 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
 566                         local->iff_allmultis--;
 567                 else
 568                         local->iff_allmultis++;
 569                 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
 570         }
 571         if (((dev->flags & IFF_PROMISC) != 0) ^
 572             ((sdata->flags & IEEE80211_SDATA_PROMISC) != 0)) {
 573                 if (sdata->flags & IEEE80211_SDATA_PROMISC)
 574                         local->iff_promiscs--;
 575                 else
 576                         local->iff_promiscs++;
 577                 sdata->flags ^= IEEE80211_SDATA_PROMISC;
 578         }
 579         if (dev->mc_count != sdata->mc_count) {
 580                 local->mc_count = local->mc_count - sdata->mc_count +
 581                                   dev->mc_count;
 582                 sdata->mc_count = dev->mc_count;
 583         }
 584         if (local->ops->set_multicast_list) {
 585                 flags = local->mdev->flags;
 586                 if (local->iff_allmultis)
 587                         flags |= IFF_ALLMULTI;
 588                 if (local->iff_promiscs)
 589                         flags |= IFF_PROMISC;
 590                 read_lock(&local->sub_if_lock);
 591                 local->ops->set_multicast_list(local_to_hw(local), flags,
 592                                               local->mc_count);
 593                 read_unlock(&local->sub_if_lock);
 594         }
 595         netif_tx_unlock(local->mdev);
 596 }
 597
 598 /* Must not be called for mdev and apdev */
 599 void ieee80211_if_setup(struct net_device *dev)
 600 {
 601         ether_setup(dev);
 602         dev->hard_start_xmit = ieee80211_subif_start_xmit;
 603         dev->wireless_handlers = &ieee80211_iw_handler_def;
 604         dev->set_multicast_list = ieee80211_set_multicast_list;
 605         dev->change_mtu = ieee80211_change_mtu;
 606         dev->get_stats = ieee80211_get_stats;
 607         dev->open = ieee80211_open;
 608         dev->stop = ieee80211_stop;
 609         dev->uninit = ieee80211_if_reinit;
 610         dev->destructor = ieee80211_if_free;
 611 }
 612
 613 /* WDS specialties */
 614
 615 int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr)
 616 {
 617         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 618         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 619         struct sta_info *sta;
 620
 621         if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0)
 622                 return 0;
 623
 624         /* Create STA entry for the new peer */
 625         sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL);
 626         if (!sta)
 627                 return -ENOMEM;
 628         sta_info_put(sta);
 629
 630         /* Remove STA entry for the old peer */
 631         sta = sta_info_get(local, sdata->u.wds.remote_addr);
 632         if (sta) {
 633                 sta_info_free(sta);
 634                 sta_info_put(sta);
 635         } else {
 636                 printk(KERN_DEBUG "%s: could not find STA entry for WDS link "
 637                        "peer " MAC_FMT "\n",
 638                        dev->name, MAC_ARG(sdata->u.wds.remote_addr));
 639         }
 640
 641         /* Update WDS link data */
 642         memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN);
 643
 644         return 0;
 645 }
 646
 647 /* everything else */
 648
 649 static int __ieee80211_if_config(struct net_device *dev,
 650                                  struct sk_buff *beacon,
 651                                  struct ieee80211_tx_control *control)
 652 {
 653         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 654         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 655         struct ieee80211_if_conf conf;
 656         static u8 scan_bssid[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 657
 658         if (!local->ops->config_interface || !netif_running(dev))
 659                 return 0;
 660
 661         memset(&conf, 0, sizeof(conf));
 662         conf.type = sdata->type;
 663         if (sdata->type == IEEE80211_IF_TYPE_STA ||
 664             sdata->type == IEEE80211_IF_TYPE_IBSS) {
 665                 if (local->sta_scanning &&
 666                     local->scan_dev == dev)
 667                         conf.bssid = scan_bssid;
 668                 else
 669                         conf.bssid = sdata->u.sta.bssid;
 670                 conf.ssid = sdata->u.sta.ssid;
 671                 conf.ssid_len = sdata->u.sta.ssid_len;
 672                 conf.generic_elem = sdata->u.sta.extra_ie;
 673                 conf.generic_elem_len = sdata->u.sta.extra_ie_len;
 674         } else if (sdata->type == IEEE80211_IF_TYPE_AP) {
 675                 conf.ssid = sdata->u.ap.ssid;
 676                 conf.ssid_len = sdata->u.ap.ssid_len;
 677                 conf.generic_elem = sdata->u.ap.generic_elem;
 678                 conf.generic_elem_len = sdata->u.ap.generic_elem_len;
 679                 conf.beacon = beacon;
 680                 conf.beacon_control = control;
 681         }
 682         return local->ops->config_interface(local_to_hw(local),
 683                                            dev->ifindex, &conf);
 684 }
 685
 686 int ieee80211_if_config(struct net_device *dev)
 687 {
 688         return __ieee80211_if_config(dev, NULL, NULL);
 689 }
 690
 691 int ieee80211_if_config_beacon(struct net_device *dev)
 692 {
 693         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 694         struct ieee80211_tx_control control;
 695         struct sk_buff *skb;
 696
 697         if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
 698                 return 0;
 699         skb = ieee80211_beacon_get(local_to_hw(local), dev->ifindex, &control);
 700         if (!skb)
 701                 return -ENOMEM;
 702         return __ieee80211_if_config(dev, skb, &control);
 703 }
 704
 705 int ieee80211_hw_config(struct ieee80211_local *local)
 706 {
 707         struct ieee80211_hw_mode *mode;
 708         struct ieee80211_channel *chan;
 709         int ret = 0;
 710
 711         if (local->sta_scanning) {
 712                 chan = local->scan_channel;
 713                 mode = local->scan_hw_mode;
 714         } else {
 715                 chan = local->oper_channel;
 716                 mode = local->oper_hw_mode;
 717         }
 718
 719         local->hw.conf.channel = chan->chan;
 720         local->hw.conf.channel_val = chan->val;
 721         local->hw.conf.power_level = chan->power_level;
 722         local->hw.conf.freq = chan->freq;
 723         local->hw.conf.phymode = mode->mode;
 724         local->hw.conf.antenna_max = chan->antenna_max;
 725         local->hw.conf.chan = chan;
 726         local->hw.conf.mode = mode;
 727
 728 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 729         printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d "
 730                "phymode=%d\n", local->hw.conf.channel, local->hw.conf.freq,
 731                local->hw.conf.phymode);
 732 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
 733
 734         if (local->ops->config)
 735                 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
 736
 737         return ret;
 738 }
 739
 740 void ieee80211_erp_info_change_notify(struct net_device *dev, u8 changes)
 741 {
 742         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 743         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 744         if (local->ops->erp_ie_changed)
 745                 local->ops->erp_ie_changed(local_to_hw(local), changes,
 746                         !!(sdata->flags & IEEE80211_SDATA_USE_PROTECTION),
 747                         !(sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE));
 748 }
 749
 750 void ieee80211_reset_erp_info(struct net_device *dev)
 751 {
 752         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 753
 754         sdata->flags &= ~(IEEE80211_SDATA_USE_PROTECTION |
 755                         IEEE80211_SDATA_SHORT_PREAMBLE);
 756         ieee80211_erp_info_change_notify(dev,
 757                                          IEEE80211_ERP_CHANGE_PROTECTION |
 758                                          IEEE80211_ERP_CHANGE_PREAMBLE);
 759 }
 760
 761 struct dev_mc_list *ieee80211_get_mc_list_item(struct ieee80211_hw *hw,
 762                                                struct dev_mc_list *prev,
 763                                                void **ptr)
 764 {
 765         struct ieee80211_local *local = hw_to_local(hw);
 766         struct ieee80211_sub_if_data *sdata = *ptr;
 767         struct dev_mc_list *mc;
 768
 769         if (!prev) {
 770                 WARN_ON(sdata);
 771                 sdata = NULL;
 772         }
 773         if (!prev || !prev->next) {
 774                 if (sdata)
 775                         sdata = list_entry(sdata->list.next,
 776                                            struct ieee80211_sub_if_data, list);
 777                 else
 778                         sdata = list_entry(local->sub_if_list.next,
 779                                            struct ieee80211_sub_if_data, list);
 780                 if (&sdata->list != &local->sub_if_list)
 781                         mc = sdata->dev->mc_list;
 782                 else
 783                         mc = NULL;
 784         } else
 785                 mc = prev->next;
 786
 787         *ptr = sdata;
 788         return mc;
 789 }
 790 EXPORT_SYMBOL(ieee80211_get_mc_list_item);
 791
 792 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
 793                                  struct sk_buff *skb,
 794                                  struct ieee80211_tx_status *status)
 795 {
 796         struct ieee80211_local *local = hw_to_local(hw);
 797         struct ieee80211_tx_status *saved;
 798         int tmp;
 799
 800         skb->dev = local->mdev;
 801         saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC);
 802         if (unlikely(!saved)) {
 803                 if (net_ratelimit())
 804                         printk(KERN_WARNING "%s: Not enough memory, "
 805                                "dropping tx status", skb->dev->name);
 806                 /* should be dev_kfree_skb_irq, but due to this function being
 807                  * named _irqsafe instead of just _irq we can't be sure that
 808                  * people won't call it from non-irq contexts */
 809                 dev_kfree_skb_any(skb);
 810                 return;
 811         }
 812         memcpy(saved, status, sizeof(struct ieee80211_tx_status));
 813         /* copy pointer to saved status into skb->cb for use by tasklet */
 814         memcpy(skb->cb, &saved, sizeof(saved));
 815
 816         skb->pkt_type = IEEE80211_TX_STATUS_MSG;
 817         skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ?
 818                        &local->skb_queue : &local->skb_queue_unreliable, skb);
 819         tmp = skb_queue_len(&local->skb_queue) +
 820                 skb_queue_len(&local->skb_queue_unreliable);
 821         while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
 822                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 823                 memcpy(&saved, skb->cb, sizeof(saved));
 824                 kfree(saved);
 825                 dev_kfree_skb_irq(skb);
 826                 tmp--;
 827                 I802_DEBUG_INC(local->tx_status_drop);
 828         }
 829         tasklet_schedule(&local->tasklet);
 830 }
 831 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
 832
 833 static void ieee80211_tasklet_handler(unsigned long data)
 834 {
 835         struct ieee80211_local *local = (struct ieee80211_local *) data;
 836         struct sk_buff *skb;
 837         struct ieee80211_rx_status rx_status;
 838         struct ieee80211_tx_status *tx_status;
 839
 840         while ((skb = skb_dequeue(&local->skb_queue)) ||
 841                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 842                 switch (skb->pkt_type) {
 843                 case IEEE80211_RX_MSG:
 844                         /* status is in skb->cb */
 845                         memcpy(&rx_status, skb->cb, sizeof(rx_status));
 846                         /* Clear skb->type in order to not confuse kernel
 847                          * netstack. */
 848                         skb->pkt_type = 0;
 849                         __ieee80211_rx(local_to_hw(local), skb, &rx_status);
 850                         break;
 851                 case IEEE80211_TX_STATUS_MSG:
 852                         /* get pointer to saved status out of skb->cb */
 853                         memcpy(&tx_status, skb->cb, sizeof(tx_status));
 854                         skb->pkt_type = 0;
 855                         ieee80211_tx_status(local_to_hw(local),
 856                                             skb, tx_status);
 857                         kfree(tx_status);
 858                         break;
 859                 default: /* should never get here! */
 860                         printk(KERN_ERR "%s: Unknown message type (%d)\n",
 861                                local->mdev->name, skb->pkt_type);
 862                         dev_kfree_skb(skb);
 863                         break;
 864                 }
 865         }
 866 }
 867
 868 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
 869  * make a prepared TX frame (one that has been given to hw) to look like brand
 870  * new IEEE 802.11 frame that is ready to go through TX processing again.
 871  * Also, tx_packet_data in cb is restored from tx_control. */
 872 static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
 873                                       struct ieee80211_key *key,
 874                                       struct sk_buff *skb,
 875                                       struct ieee80211_tx_control *control)
 876 {
 877         int hdrlen, iv_len, mic_len;
 878         struct ieee80211_tx_packet_data *pkt_data;
 879
 880         pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
 881         pkt_data->ifindex = control->ifindex;
 882         pkt_data->flags = 0;
 883         if (control->flags & IEEE80211_TXCTL_REQ_TX_STATUS)
 884                 pkt_data->flags |= IEEE80211_TXPD_REQ_TX_STATUS;
 885         if (control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT)
 886                 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
 887         if (control->flags & IEEE80211_TXCTL_REQUEUE)
 888                 pkt_data->flags |= IEEE80211_TXPD_REQUEUE;
 889         if (control->type == IEEE80211_IF_TYPE_MGMT)
 890                 pkt_data->flags |= IEEE80211_TXPD_MGMT_IFACE;
 891         pkt_data->queue = control->queue;
 892
 893         hdrlen = ieee80211_get_hdrlen_from_skb(skb);
 894
 895         if (!key)
 896                 goto no_key;
 897
 898         switch (key->conf.alg) {
 899         case ALG_WEP:
 900                 iv_len = WEP_IV_LEN;
 901                 mic_len = WEP_ICV_LEN;
 902                 break;
 903         case ALG_TKIP:
 904                 iv_len = TKIP_IV_LEN;
 905                 mic_len = TKIP_ICV_LEN;
 906                 break;
 907         case ALG_CCMP:
 908                 iv_len = CCMP_HDR_LEN;
 909                 mic_len = CCMP_MIC_LEN;
 910                 break;
 911         default:
 912                 goto no_key;
 913         }
 914
 915         if (skb->len >= mic_len &&
 916             !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
 917                 skb_trim(skb, skb->len - mic_len);
 918         if (skb->len >= iv_len && skb->len > hdrlen) {
 919                 memmove(skb->data + iv_len, skb->data, hdrlen);
 920                 skb_pull(skb, iv_len);
 921         }
 922
 923 no_key:
 924         {
 925                 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 926                 u16 fc = le16_to_cpu(hdr->frame_control);
 927                 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
 928                         fc &= ~IEEE80211_STYPE_QOS_DATA;
 929                         hdr->frame_control = cpu_to_le16(fc);
 930                         memmove(skb->data + 2, skb->data, hdrlen - 2);
 931                         skb_pull(skb, 2);
 932                 }
 933         }
 934 }
 935
 936 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
 937                          struct ieee80211_tx_status *status)
 938 {
 939         struct sk_buff *skb2;
 940         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 941         struct ieee80211_local *local = hw_to_local(hw);
 942         u16 frag, type;
 943         u32 msg_type;
 944         struct ieee80211_tx_status_rtap_hdr *rthdr;
 945         struct ieee80211_sub_if_data *sdata;
 946         int monitors;
 947
 948         if (!status) {
 949                 printk(KERN_ERR
 950                        "%s: ieee80211_tx_status called with NULL status\n",
 951                        local->mdev->name);
 952                 dev_kfree_skb(skb);
 953                 return;
 954         }
 955
 956         if (status->excessive_retries) {
 957                 struct sta_info *sta;
 958                 sta = sta_info_get(local, hdr->addr1);
 959                 if (sta) {
 960                         if (sta->flags & WLAN_STA_PS) {
 961                                 /* The STA is in power save mode, so assume
 962                                  * that this TX packet failed because of that.
 963                                  */
 964                                 status->excessive_retries = 0;
 965                                 status->flags |= IEEE80211_TX_STATUS_TX_FILTERED;
 966                         }
 967                         sta_info_put(sta);
 968                 }
 969         }
 970
 971         if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
 972                 struct sta_info *sta;
 973                 sta = sta_info_get(local, hdr->addr1);
 974                 if (sta) {
 975                         sta->tx_filtered_count++;
 976
 977                         /* Clear the TX filter mask for this STA when sending
 978                          * the next packet. If the STA went to power save mode,
 979                          * this will happen when it is waking up for the next
 980                          * time. */
 981                         sta->clear_dst_mask = 1;
 982
 983                         /* TODO: Is the WLAN_STA_PS flag always set here or is
 984                          * the race between RX and TX status causing some
 985                          * packets to be filtered out before 80211.o gets an
 986                          * update for PS status? This seems to be the case, so
 987                          * no changes are likely to be needed. */
 988                         if (sta->flags & WLAN_STA_PS &&
 989                             skb_queue_len(&sta->tx_filtered) <
 990                             STA_MAX_TX_BUFFER) {
 991                                 ieee80211_remove_tx_extra(local, sta->key,
 992                                                           skb,
 993                                                           &status->control);
 994                                 skb_queue_tail(&sta->tx_filtered, skb);
 995                         } else if (!(sta->flags & WLAN_STA_PS) &&
 996                                    !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) {
 997                                 /* Software retry the packet once */
 998                                 status->control.flags |= IEEE80211_TXCTL_REQUEUE;
 999                                 ieee80211_remove_tx_extra(local, sta->key,
1000                                                           skb,
1001                                                           &status->control);
1002                                 dev_queue_xmit(skb);
1003                         } else {
1004                                 if (net_ratelimit()) {
1005                                         printk(KERN_DEBUG "%s: dropped TX "
1006                                                "filtered frame queue_len=%d "
1007                                                "PS=%d @%lu\n",
1008                                                local->mdev->name,
1009                                                skb_queue_len(
1010                                                        &sta->tx_filtered),
1011                                                !!(sta->flags & WLAN_STA_PS),
1012                                                jiffies);
1013                                 }
1014                                 dev_kfree_skb(skb);
1015                         }
1016                         sta_info_put(sta);
1017                         return;
1018                 }
1019         } else {
1020                 /* FIXME: STUPID to call this with both local and local->mdev */
1021                 rate_control_tx_status(local, local->mdev, skb, status);
1022         }
1023
1024         ieee80211_led_tx(local, 0);
1025
1026         /* SNMP counters
1027          * Fragments are passed to low-level drivers as separate skbs, so these
1028          * are actually fragments, not frames. Update frame counters only for
1029          * the first fragment of the frame. */
1030
1031         frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
1032         type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
1033
1034         if (status->flags & IEEE80211_TX_STATUS_ACK) {
1035                 if (frag == 0) {
1036                         local->dot11TransmittedFrameCount++;
1037                         if (is_multicast_ether_addr(hdr->addr1))
1038                                 local->dot11MulticastTransmittedFrameCount++;
1039                         if (status->retry_count > 0)
1040                                 local->dot11RetryCount++;
1041                         if (status->retry_count > 1)
1042                                 local->dot11MultipleRetryCount++;
1043                 }
1044
1045                 /* This counter shall be incremented for an acknowledged MPDU
1046                  * with an individual address in the address 1 field or an MPDU
1047                  * with a multicast address in the address 1 field of type Data
1048                  * or Management. */
1049                 if (!is_multicast_ether_addr(hdr->addr1) ||
1050                     type == IEEE80211_FTYPE_DATA ||
1051                     type == IEEE80211_FTYPE_MGMT)
1052                         local->dot11TransmittedFragmentCount++;
1053         } else {
1054                 if (frag == 0)
1055                         local->dot11FailedCount++;
1056         }
1057
1058         msg_type = (status->flags & IEEE80211_TX_STATUS_ACK) ?
1059                 ieee80211_msg_tx_callback_ack : ieee80211_msg_tx_callback_fail;
1060
1061         /* this was a transmitted frame, but now we want to reuse it */
1062         skb_orphan(skb);
1063
1064         if ((status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS) &&
1065             local->apdev) {
1066                 if (local->monitors) {
1067                         skb2 = skb_clone(skb, GFP_ATOMIC);
1068                 } else {
1069                         skb2 = skb;
1070                         skb = NULL;
1071                 }
1072
1073                 if (skb2)
1074                         /* Send frame to hostapd */
1075                         ieee80211_rx_mgmt(local, skb2, NULL, msg_type);
1076
1077                 if (!skb)
1078                         return;
1079         }
1080
1081         if (!local->monitors) {
1082                 dev_kfree_skb(skb);
1083                 return;
1084         }
1085
1086         /* send frame to monitor interfaces now */
1087
1088         if (skb_headroom(skb) < sizeof(*rthdr)) {
1089                 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
1090                 dev_kfree_skb(skb);
1091                 return;
1092         }
1093
1094         rthdr = (struct ieee80211_tx_status_rtap_hdr*)
1095                                 skb_push(skb, sizeof(*rthdr));
1096
1097         memset(rthdr, 0, sizeof(*rthdr));
1098         rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
1099         rthdr->hdr.it_present =
1100                 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
1101                             (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
1102
1103         if (!(status->flags & IEEE80211_TX_STATUS_ACK) &&
1104             !is_multicast_ether_addr(hdr->addr1))
1105                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
1106
1107         if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) &&
1108             (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT))
1109                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
1110         else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS)
1111                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
1112
1113         rthdr->data_retries = status->retry_count;
1114
1115         read_lock(&local->sub_if_lock);
1116         monitors = local->monitors;
1117         list_for_each_entry(sdata, &local->sub_if_list, list) {
1118                 /*
1119                  * Using the monitors counter is possibly racy, but
1120                  * if the value is wrong we simply either clone the skb
1121                  * once too much or forget sending it to one monitor iface
1122                  * The latter case isn't nice but fixing the race is much
1123                  * more complicated.
1124                  */
1125                 if (!monitors || !skb)
1126                         goto out;
1127
1128                 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
1129                         if (!netif_running(sdata->dev))
1130                                 continue;
1131                         monitors--;
1132                         if (monitors)
1133                                 skb2 = skb_clone(skb, GFP_KERNEL);
1134                         else
1135                                 skb2 = NULL;
1136                         skb->dev = sdata->dev;
1137                         /* XXX: is this sufficient for BPF? */
1138                         skb_set_mac_header(skb, 0);
1139                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1140                         skb->pkt_type = PACKET_OTHERHOST;
1141                         skb->protocol = htons(ETH_P_802_2);
1142                         memset(skb->cb, 0, sizeof(skb->cb));
1143                         netif_rx(skb);
1144                         skb = skb2;
1145                 }
1146         }
1147  out:
1148         read_unlock(&local->sub_if_lock);
1149         if (skb)
1150                 dev_kfree_skb(skb);
1151 }
1152 EXPORT_SYMBOL(ieee80211_tx_status);
1153
1154 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
1155                                         const struct ieee80211_ops *ops)
1156 {
1157         struct net_device *mdev;
1158         struct ieee80211_local *local;
1159         struct ieee80211_sub_if_data *sdata;
1160         int priv_size;
1161         struct wiphy *wiphy;
1162
1163         /* Ensure 32-byte alignment of our private data and hw private data.
1164          * We use the wiphy priv data for both our ieee80211_local and for
1165          * the driver's private data
1166          *
1167          * In memory it'll be like this:
1168          *
1169          * +-------------------------+
1170          * | struct wiphy           |
1171          * +-------------------------+
1172          * | struct ieee80211_local  |
1173          * +-------------------------+
1174          * | driver's private data   |
1175          * +-------------------------+
1176          *
1177          */
1178         priv_size = ((sizeof(struct ieee80211_local) +
1179                       NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1180                     priv_data_len;
1181
1182         wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1183
1184         if (!wiphy)
1185                 return NULL;
1186
1187         wiphy->privid = mac80211_wiphy_privid;
1188
1189         local = wiphy_priv(wiphy);
1190         local->hw.wiphy = wiphy;
1191
1192         local->hw.priv = (char *)local +
1193                          ((sizeof(struct ieee80211_local) +
1194                            NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1195
1196         BUG_ON(!ops->tx);
1197         BUG_ON(!ops->config);
1198         BUG_ON(!ops->add_interface);
1199         local->ops = ops;
1200
1201         /* for now, mdev needs sub_if_data :/ */
1202         mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
1203                             "wmaster%d", ether_setup);
1204         if (!mdev) {
1205                 wiphy_free(wiphy);
1206                 return NULL;
1207         }
1208
1209         sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
1210         mdev->ieee80211_ptr = &sdata->wdev;
1211         sdata->wdev.wiphy = wiphy;
1212
1213         local->hw.queues = 1; /* default */
1214
1215         local->mdev = mdev;
1216         local->rx_pre_handlers = ieee80211_rx_pre_handlers;
1217         local->rx_handlers = ieee80211_rx_handlers;
1218         local->tx_handlers = ieee80211_tx_handlers;
1219
1220         local->bridge_packets = 1;
1221
1222         local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1223         local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1224         local->short_retry_limit = 7;
1225         local->long_retry_limit = 4;
1226         local->hw.conf.radio_enabled = 1;
1227
1228         local->enabled_modes = (unsigned int) -1;
1229
1230         INIT_LIST_HEAD(&local->modes_list);
1231
1232         rwlock_init(&local->sub_if_lock);
1233         INIT_LIST_HEAD(&local->sub_if_list);
1234
1235         INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
1236         ieee80211_rx_bss_list_init(mdev);
1237
1238         sta_info_init(local);
1239
1240         mdev->hard_start_xmit = ieee80211_master_start_xmit;
1241         mdev->open = ieee80211_master_open;
1242         mdev->stop = ieee80211_master_stop;
1243         mdev->type = ARPHRD_IEEE80211;
1244         mdev->hard_header_parse = header_parse_80211;
1245
1246         sdata->type = IEEE80211_IF_TYPE_AP;
1247         sdata->dev = mdev;
1248         sdata->local = local;
1249         sdata->u.ap.force_unicast_rateidx = -1;
1250         sdata->u.ap.max_ratectrl_rateidx = -1;
1251         ieee80211_if_sdata_init(sdata);
1252         list_add_tail(&sdata->list, &local->sub_if_list);
1253
1254         tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1255                      (unsigned long)local);
1256         tasklet_disable(&local->tx_pending_tasklet);
1257
1258         tasklet_init(&local->tasklet,
1259                      ieee80211_tasklet_handler,
1260                      (unsigned long) local);
1261         tasklet_disable(&local->tasklet);
1262
1263         skb_queue_head_init(&local->skb_queue);
1264         skb_queue_head_init(&local->skb_queue_unreliable);
1265
1266         return local_to_hw(local);
1267 }
1268 EXPORT_SYMBOL(ieee80211_alloc_hw);
1269
1270 int ieee80211_register_hw(struct ieee80211_hw *hw)
1271 {
1272         struct ieee80211_local *local = hw_to_local(hw);
1273         const char *name;
1274         int result;
1275
1276         result = wiphy_register(local->hw.wiphy);
1277         if (result < 0)
1278                 return result;
1279
1280         name = wiphy_dev(local->hw.wiphy)->driver->name;
1281         local->hw.workqueue = create_singlethread_workqueue(name);
1282         if (!local->hw.workqueue) {
1283                 result = -ENOMEM;
1284                 goto fail_workqueue;
1285         }
1286
1287         /*
1288          * The hardware needs headroom for sending the frame,
1289          * and we need some headroom for passing the frame to monitor
1290          * interfaces, but never both at the same time.
1291          */
1292         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1293                                    sizeof(struct ieee80211_tx_status_rtap_hdr));
1294
1295         debugfs_hw_add(local);
1296
1297         local->hw.conf.beacon_int = 1000;
1298
1299         local->wstats_flags |= local->hw.max_rssi ?
1300                                IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID;
1301         local->wstats_flags |= local->hw.max_signal ?
1302                                IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1303         local->wstats_flags |= local->hw.max_noise ?
1304                                IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1305         if (local->hw.max_rssi < 0 || local->hw.max_noise < 0)
1306                 local->wstats_flags |= IW_QUAL_DBM;
1307
1308         result = sta_info_start(local);
1309         if (result < 0)
1310                 goto fail_sta_info;
1311
1312         rtnl_lock();
1313         result = dev_alloc_name(local->mdev, local->mdev->name);
1314         if (result < 0)
1315                 goto fail_dev;
1316
1317         memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1318         SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1319
1320         result = register_netdevice(local->mdev);
1321         if (result < 0)
1322                 goto fail_dev;
1323
1324         ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1325
1326         result = ieee80211_init_rate_ctrl_alg(local, NULL);
1327         if (result < 0) {
1328                 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1329                        "algorithm\n", local->mdev->name);
1330                 goto fail_rate;
1331         }
1332
1333         result = ieee80211_wep_init(local);
1334
1335         if (result < 0) {
1336                 printk(KERN_DEBUG "%s: Failed to initialize wep\n",
1337                        local->mdev->name);
1338                 goto fail_wep;
1339         }
1340
1341         ieee80211_install_qdisc(local->mdev);
1342
1343         /* add one default STA interface */
1344         result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
1345                                   IEEE80211_IF_TYPE_STA);
1346         if (result)
1347                 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1348                        local->mdev->name);
1349
1350         local->reg_state = IEEE80211_DEV_REGISTERED;
1351         rtnl_unlock();
1352
1353         ieee80211_led_init(local);
1354
1355         return 0;
1356
1357 fail_wep:
1358         rate_control_deinitialize(local);
1359 fail_rate:
1360         ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1361         unregister_netdevice(local->mdev);
1362 fail_dev:
1363         rtnl_unlock();
1364         sta_info_stop(local);
1365 fail_sta_info:
1366         debugfs_hw_del(local);
1367         destroy_workqueue(local->hw.workqueue);
1368 fail_workqueue:
1369         wiphy_unregister(local->hw.wiphy);
1370         return result;
1371 }
1372 EXPORT_SYMBOL(ieee80211_register_hw);
1373
1374 int ieee80211_register_hwmode(struct ieee80211_hw *hw,
1375                               struct ieee80211_hw_mode *mode)
1376 {
1377         struct ieee80211_local *local = hw_to_local(hw);
1378         struct ieee80211_rate *rate;
1379         int i;
1380
1381         INIT_LIST_HEAD(&mode->list);
1382         list_add_tail(&mode->list, &local->modes_list);
1383
1384         local->hw_modes |= (1 << mode->mode);
1385         for (i = 0; i < mode->num_rates; i++) {
1386                 rate = &(mode->rates[i]);
1387                 rate->rate_inv = CHAN_UTIL_RATE_LCM / rate->rate;
1388         }
1389         ieee80211_prepare_rates(local, mode);
1390
1391         if (!local->oper_hw_mode) {
1392                 /* Default to this mode */
1393                 local->hw.conf.phymode = mode->mode;
1394                 local->oper_hw_mode = local->scan_hw_mode = mode;
1395                 local->oper_channel = local->scan_channel = &mode->channels[0];
1396                 local->hw.conf.mode = local->oper_hw_mode;
1397                 local->hw.conf.chan = local->oper_channel;
1398         }
1399
1400         if (!(hw->flags & IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED))
1401                 ieee80211_set_default_regdomain(mode);
1402
1403         return 0;
1404 }
1405 EXPORT_SYMBOL(ieee80211_register_hwmode);
1406
1407 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1408 {
1409         struct ieee80211_local *local = hw_to_local(hw);
1410         struct ieee80211_sub_if_data *sdata, *tmp;
1411         struct list_head tmp_list;
1412         int i;
1413
1414         tasklet_kill(&local->tx_pending_tasklet);
1415         tasklet_kill(&local->tasklet);
1416
1417         rtnl_lock();
1418
1419         BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
1420
1421         local->reg_state = IEEE80211_DEV_UNREGISTERED;
1422         if (local->apdev)
1423                 ieee80211_if_del_mgmt(local);
1424
1425         write_lock_bh(&local->sub_if_lock);
1426         list_replace_init(&local->sub_if_list, &tmp_list);
1427         write_unlock_bh(&local->sub_if_lock);
1428
1429         list_for_each_entry_safe(sdata, tmp, &tmp_list, list)
1430                 __ieee80211_if_del(local, sdata);
1431
1432         rtnl_unlock();
1433
1434         ieee80211_rx_bss_list_deinit(local->mdev);
1435         ieee80211_clear_tx_pending(local);
1436         sta_info_stop(local);
1437         rate_control_deinitialize(local);
1438         debugfs_hw_del(local);
1439
1440         for (i = 0; i < NUM_IEEE80211_MODES; i++) {
1441                 kfree(local->supp_rates[i]);
1442                 kfree(local->basic_rates[i]);
1443         }
1444
1445         if (skb_queue_len(&local->skb_queue)
1446                         || skb_queue_len(&local->skb_queue_unreliable))
1447                 printk(KERN_WARNING "%s: skb_queue not empty\n",
1448                        local->mdev->name);
1449         skb_queue_purge(&local->skb_queue);
1450         skb_queue_purge(&local->skb_queue_unreliable);
1451
1452         destroy_workqueue(local->hw.workqueue);
1453         wiphy_unregister(local->hw.wiphy);
1454         ieee80211_wep_free(local);
1455         ieee80211_led_exit(local);
1456 }
1457 EXPORT_SYMBOL(ieee80211_unregister_hw);
1458
1459 void ieee80211_free_hw(struct ieee80211_hw *hw)
1460 {
1461         struct ieee80211_local *local = hw_to_local(hw);
1462
1463         ieee80211_if_free(local->mdev);
1464         wiphy_free(local->hw.wiphy);
1465 }
1466 EXPORT_SYMBOL(ieee80211_free_hw);
1467
1468 struct net_device_stats *ieee80211_dev_stats(struct net_device *dev)
1469 {
1470         struct ieee80211_sub_if_data *sdata;
1471         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1472         return &sdata->stats;
1473 }
1474
1475 static int __init ieee80211_init(void)
1476 {
1477         struct sk_buff *skb;
1478         int ret;
1479
1480         BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb));
1481
1482         ret = ieee80211_wme_register();
1483         if (ret) {
1484                 printk(KERN_DEBUG "ieee80211_init: failed to "
1485                        "initialize WME (err=%d)\n", ret);
1486                 return ret;
1487         }
1488
1489         ieee80211_debugfs_netdev_init();
1490         ieee80211_regdomain_init();
1491
1492         return 0;
1493 }
1494
1495 static void __exit ieee80211_exit(void)
1496 {
1497         ieee80211_wme_unregister();
1498         ieee80211_debugfs_netdev_exit();
1499 }
1500
1501
1502 subsys_initcall(ieee80211_init);
1503 module_exit(ieee80211_exit);
1504
1505 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1506 MODULE_LICENSE("GPL");