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

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