net/mac80211/ieee80211.c

   1 /*
   2  * Copyright 2002-2005, Instant802 Networks, Inc.
   3  * Copyright 2005-2006, Devicescape Software, Inc.
   4  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #include <net/mac80211.h>
  12 #include <net/ieee80211_radiotap.h>
  13 #include <linux/module.h>
  14 #include <linux/init.h>
  15 #include <linux/netdevice.h>
  16 #include <linux/types.h>
  17 #include <linux/slab.h>
  18 #include <linux/skbuff.h>
  19 #include <linux/etherdevice.h>
  20 #include <linux/if_arp.h>
  21 #include <linux/wireless.h>
  22 #include <linux/rtnetlink.h>
  23 #include <linux/bitmap.h>
  24 #include <net/net_namespace.h>
  25 #include <net/cfg80211.h>
  26
  27 #include "ieee80211_common.h"
  28 #include "ieee80211_i.h"
  29 #include "ieee80211_rate.h"
  30 #include "wep.h"
  31 #include "wme.h"
  32 #include "aes_ccm.h"
  33 #include "ieee80211_led.h"
  34 #include "cfg.h"
  35 #include "debugfs.h"
  36 #include "debugfs_netdev.h"
  37
  38 /*
  39  * For seeing transmitted packets on monitor interfaces
  40  * we have a radiotap header too.
  41  */
  42 struct ieee80211_tx_status_rtap_hdr {
  43         struct ieee80211_radiotap_header hdr;
  44         __le16 tx_flags;
  45         u8 data_retries;
  46 } __attribute__ ((packed));
  47
  48 /* common interface routines */
  49
  50 static int header_parse_80211(const struct sk_buff *skb, unsigned char *haddr)
  51 {
  52         memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
  53         return ETH_ALEN;
  54 }
  55
  56 /* must be called under mdev tx lock */
  57 static void ieee80211_configure_filter(struct ieee80211_local *local)
  58 {
  59         unsigned int changed_flags;
  60         unsigned int new_flags = 0;
  61
  62         if (local->iff_promiscs)
  63                 new_flags |= FIF_PROMISC_IN_BSS;
  64
  65         if (local->iff_allmultis)
  66                 new_flags |= FIF_ALLMULTI;
  67
  68         if (local->monitors)
  69                 new_flags |= FIF_CONTROL |
  70                              FIF_OTHER_BSS |
  71                              FIF_BCN_PRBRESP_PROMISC;
  72
  73         changed_flags = local->filter_flags ^ new_flags;
  74
  75         /* be a bit nasty */
  76         new_flags |= (1<<31);
  77
  78         local->ops->configure_filter(local_to_hw(local),
  79                                      changed_flags, &new_flags,
  80                                      local->mdev->mc_count,
  81                                      local->mdev->mc_list);
  82
  83         WARN_ON(new_flags & (1<<31));
  84
  85         local->filter_flags = new_flags & ~(1<<31);
  86 }
  87
  88 /* master interface */
  89
  90 static int ieee80211_master_open(struct net_device *dev)
  91 {
  92         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
  93         struct ieee80211_sub_if_data *sdata;
  94         int res = -EOPNOTSUPP;
  95
  96         read_lock(&local->sub_if_lock);
  97         list_for_each_entry(sdata, &local->sub_if_list, list) {
  98                 if (sdata->dev != dev && netif_running(sdata->dev)) {
  99                         res = 0;
 100                         break;
 101                 }
 102         }
 103         read_unlock(&local->sub_if_lock);
 104         return res;
 105 }
 106
 107 static int ieee80211_master_stop(struct net_device *dev)
 108 {
 109         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 110         struct ieee80211_sub_if_data *sdata;
 111
 112         read_lock(&local->sub_if_lock);
 113         list_for_each_entry(sdata, &local->sub_if_list, list)
 114                 if (sdata->dev != dev && netif_running(sdata->dev))
 115                         dev_close(sdata->dev);
 116         read_unlock(&local->sub_if_lock);
 117
 118         return 0;
 119 }
 120
 121 static void ieee80211_master_set_multicast_list(struct net_device *dev)
 122 {
 123         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 124
 125         ieee80211_configure_filter(local);
 126 }
 127
 128 /* management interface */
 129
 130 static void
 131 ieee80211_fill_frame_info(struct ieee80211_local *local,
 132                           struct ieee80211_frame_info *fi,
 133                           struct ieee80211_rx_status *status)
 134 {
 135         if (status) {
 136                 struct timespec ts;
 137                 struct ieee80211_rate *rate;
 138
 139                 jiffies_to_timespec(jiffies, &ts);
 140                 fi->hosttime = cpu_to_be64((u64) ts.tv_sec * 1000000 +
 141                                            ts.tv_nsec / 1000);
 142                 fi->mactime = cpu_to_be64(status->mactime);
 143                 switch (status->phymode) {
 144                 case MODE_IEEE80211A:
 145                         fi->phytype = htonl(ieee80211_phytype_ofdm_dot11_a);
 146                         break;
 147                 case MODE_IEEE80211B:
 148                         fi->phytype = htonl(ieee80211_phytype_dsss_dot11_b);
 149                         break;
 150                 case MODE_IEEE80211G:
 151                         fi->phytype = htonl(ieee80211_phytype_pbcc_dot11_g);
 152                         break;
 153                 default:
 154                         fi->phytype = htonl(0xAAAAAAAA);
 155                         break;
 156                 }
 157                 fi->channel = htonl(status->channel);
 158                 rate = ieee80211_get_rate(local, status->phymode,
 159                                           status->rate);
 160                 if (rate) {
 161                         fi->datarate = htonl(rate->rate);
 162                         if (rate->flags & IEEE80211_RATE_PREAMBLE2) {
 163                                 if (status->rate == rate->val)
 164                                         fi->preamble = htonl(2); /* long */
 165                                 else if (status->rate == rate->val2)
 166                                         fi->preamble = htonl(1); /* short */
 167                         } else
 168                                 fi->preamble = htonl(0);
 169                 } else {
 170                         fi->datarate = htonl(0);
 171                         fi->preamble = htonl(0);
 172                 }
 173
 174                 fi->antenna = htonl(status->antenna);
 175                 fi->priority = htonl(0xffffffff); /* no clue */
 176                 fi->ssi_type = htonl(ieee80211_ssi_raw);
 177                 fi->ssi_signal = htonl(status->ssi);
 178                 fi->ssi_noise = 0x00000000;
 179                 fi->encoding = 0;
 180         } else {
 181                 /* clear everything because we really don't know.
 182                  * the msg_type field isn't present on monitor frames
 183                  * so we don't know whether it will be present or not,
 184                  * but it's ok to not clear it since it'll be assigned
 185                  * anyway */
 186                 memset(fi, 0, sizeof(*fi) - sizeof(fi->msg_type));
 187
 188                 fi->ssi_type = htonl(ieee80211_ssi_none);
 189         }
 190         fi->version = htonl(IEEE80211_FI_VERSION);
 191         fi->length = cpu_to_be32(sizeof(*fi) - sizeof(fi->msg_type));
 192 }
 193
 194 /* this routine is actually not just for this, but also
 195  * for pushing fake 'management' frames into userspace.
 196  * it shall be replaced by a netlink-based system. */
 197 void
 198 ieee80211_rx_mgmt(struct ieee80211_local *local, struct sk_buff *skb,
 199                   struct ieee80211_rx_status *status, u32 msg_type)
 200 {
 201         struct ieee80211_frame_info *fi;
 202         const size_t hlen = sizeof(struct ieee80211_frame_info);
 203         struct net_device *dev = local->apdev;
 204
 205         skb->dev = dev;
 206
 207         if (skb_headroom(skb) < hlen) {
 208                 I802_DEBUG_INC(local->rx_expand_skb_head);
 209                 if (pskb_expand_head(skb, hlen, 0, GFP_ATOMIC)) {
 210                         dev_kfree_skb(skb);
 211                         return;
 212                 }
 213         }
 214
 215         fi = (struct ieee80211_frame_info *) skb_push(skb, hlen);
 216
 217         ieee80211_fill_frame_info(local, fi, status);
 218         fi->msg_type = htonl(msg_type);
 219
 220         dev->stats.rx_packets++;
 221         dev->stats.rx_bytes += skb->len;
 222
 223         skb_set_mac_header(skb, 0);
 224         skb->ip_summed = CHECKSUM_UNNECESSARY;
 225         skb->pkt_type = PACKET_OTHERHOST;
 226         skb->protocol = htons(ETH_P_802_2);
 227         memset(skb->cb, 0, sizeof(skb->cb));
 228         netif_rx(skb);
 229 }
 230
 231 static int ieee80211_mgmt_open(struct net_device *dev)
 232 {
 233         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 234
 235         if (!netif_running(local->mdev))
 236                 return -EOPNOTSUPP;
 237         return 0;
 238 }
 239
 240 static int ieee80211_mgmt_stop(struct net_device *dev)
 241 {
 242         return 0;
 243 }
 244
 245 static int ieee80211_change_mtu_apdev(struct net_device *dev, int new_mtu)
 246 {
 247         /* FIX: what would be proper limits for MTU?
 248          * This interface uses 802.11 frames. */
 249         if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN) {
 250                 printk(KERN_WARNING "%s: invalid MTU %d\n",
 251                        dev->name, new_mtu);
 252                 return -EINVAL;
 253         }
 254
 255 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 256         printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
 257 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
 258         dev->mtu = new_mtu;
 259         return 0;
 260 }
 261
 262 void ieee80211_if_mgmt_setup(struct net_device *dev)
 263 {
 264         ether_setup(dev);
 265         dev->hard_start_xmit = ieee80211_mgmt_start_xmit;
 266         dev->change_mtu = ieee80211_change_mtu_apdev;
 267         dev->open = ieee80211_mgmt_open;
 268         dev->stop = ieee80211_mgmt_stop;
 269         dev->type = ARPHRD_IEEE80211_PRISM;
 270         dev->uninit = ieee80211_if_reinit;
 271         dev->destructor = ieee80211_if_free;
 272 }
 273
 274 /* regular interfaces */
 275
 276 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
 277 {
 278         /* FIX: what would be proper limits for MTU?
 279          * This interface uses 802.3 frames. */
 280         if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6) {
 281                 printk(KERN_WARNING "%s: invalid MTU %d\n",
 282                        dev->name, new_mtu);
 283                 return -EINVAL;
 284         }
 285
 286 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 287         printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
 288 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
 289         dev->mtu = new_mtu;
 290         return 0;
 291 }
 292
 293 static inline int identical_mac_addr_allowed(int type1, int type2)
 294 {
 295         return (type1 == IEEE80211_IF_TYPE_MNTR ||
 296                 type2 == IEEE80211_IF_TYPE_MNTR ||
 297                 (type1 == IEEE80211_IF_TYPE_AP &&
 298                  type2 == IEEE80211_IF_TYPE_WDS) ||
 299                 (type1 == IEEE80211_IF_TYPE_WDS &&
 300                  (type2 == IEEE80211_IF_TYPE_WDS ||
 301                   type2 == IEEE80211_IF_TYPE_AP)) ||
 302                 (type1 == IEEE80211_IF_TYPE_AP &&
 303                  type2 == IEEE80211_IF_TYPE_VLAN) ||
 304                 (type1 == IEEE80211_IF_TYPE_VLAN &&
 305                  (type2 == IEEE80211_IF_TYPE_AP ||
 306                   type2 == IEEE80211_IF_TYPE_VLAN)));
 307 }
 308
 309 static int ieee80211_open(struct net_device *dev)
 310 {
 311         struct ieee80211_sub_if_data *sdata, *nsdata;
 312         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 313         struct ieee80211_if_init_conf conf;
 314         int res;
 315
 316         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 317         read_lock(&local->sub_if_lock);
 318         list_for_each_entry(nsdata, &local->sub_if_list, list) {
 319                 struct net_device *ndev = nsdata->dev;
 320
 321                 if (ndev != dev && ndev != local->mdev && netif_running(ndev) &&
 322                     compare_ether_addr(dev->dev_addr, ndev->dev_addr) == 0 &&
 323                     !identical_mac_addr_allowed(sdata->type, nsdata->type)) {
 324                         read_unlock(&local->sub_if_lock);
 325                         return -ENOTUNIQ;
 326                 }
 327         }
 328         read_unlock(&local->sub_if_lock);
 329
 330         if (sdata->type == IEEE80211_IF_TYPE_WDS &&
 331             is_zero_ether_addr(sdata->u.wds.remote_addr))
 332                 return -ENOLINK;
 333
 334         if (local->open_count == 0) {
 335                 res = 0;
 336                 if (local->ops->start)
 337                         res = local->ops->start(local_to_hw(local));
 338                 if (res)
 339                         return res;
 340         }
 341
 342         switch (sdata->type) {
 343         case IEEE80211_IF_TYPE_MNTR:
 344                 /* must be before the call to ieee80211_configure_filter */
 345                 local->monitors++;
 346                 if (local->monitors == 1) {
 347                         netif_tx_lock_bh(local->mdev);
 348                         ieee80211_configure_filter(local);
 349                         netif_tx_unlock_bh(local->mdev);
 350
 351                         local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
 352                         ieee80211_hw_config(local);
 353                 }
 354                 break;
 355         case IEEE80211_IF_TYPE_STA:
 356         case IEEE80211_IF_TYPE_IBSS:
 357                 sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
 358                 /* fall through */
 359         default:
 360                 conf.if_id = dev->ifindex;
 361                 conf.type = sdata->type;
 362                 conf.mac_addr = dev->dev_addr;
 363                 res = local->ops->add_interface(local_to_hw(local), &conf);
 364                 if (res && !local->open_count && local->ops->stop)
 365                         local->ops->stop(local_to_hw(local));
 366                 if (res)
 367                         return res;
 368
 369                 ieee80211_if_config(dev);
 370                 ieee80211_reset_erp_info(dev);
 371                 ieee80211_enable_keys(sdata);
 372
 373                 if (sdata->type == IEEE80211_IF_TYPE_STA &&
 374                     !local->user_space_mlme)
 375                         netif_carrier_off(dev);
 376                 else
 377                         netif_carrier_on(dev);
 378         }
 379
 380         if (local->open_count == 0) {
 381                 res = dev_open(local->mdev);
 382                 WARN_ON(res);
 383                 if (local->apdev) {
 384                         res = dev_open(local->apdev);
 385                         WARN_ON(res);
 386                 }
 387                 tasklet_enable(&local->tx_pending_tasklet);
 388                 tasklet_enable(&local->tasklet);
 389         }
 390
 391         local->open_count++;
 392
 393         netif_start_queue(dev);
 394
 395         return 0;
 396 }
 397
 398 static int ieee80211_stop(struct net_device *dev)
 399 {
 400         struct ieee80211_sub_if_data *sdata;
 401         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 402         struct ieee80211_if_init_conf conf;
 403
 404         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 405
 406         netif_stop_queue(dev);
 407
 408         dev_mc_unsync(local->mdev, dev);
 409
 410         local->open_count--;
 411
 412         switch (sdata->type) {
 413         case IEEE80211_IF_TYPE_MNTR:
 414                 local->monitors--;
 415                 if (local->monitors == 0) {
 416                         netif_tx_lock_bh(local->mdev);
 417                         ieee80211_configure_filter(local);
 418                         netif_tx_unlock_bh(local->mdev);
 419
 420                         local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
 421                         ieee80211_hw_config(local);
 422                 }
 423                 break;
 424         case IEEE80211_IF_TYPE_STA:
 425         case IEEE80211_IF_TYPE_IBSS:
 426                 sdata->u.sta.state = IEEE80211_DISABLED;
 427                 del_timer_sync(&sdata->u.sta.timer);
 428                 /*
 429                  * Holding the sub_if_lock for writing here blocks
 430                  * out the receive path and makes sure it's not
 431                  * currently processing a packet that may get
 432                  * added to the queue.
 433                  */
 434                 write_lock_bh(&local->sub_if_lock);
 435                 skb_queue_purge(&sdata->u.sta.skb_queue);
 436                 write_unlock_bh(&local->sub_if_lock);
 437
 438                 if (!local->ops->hw_scan &&
 439                     local->scan_dev == sdata->dev) {
 440                         local->sta_scanning = 0;
 441                         cancel_delayed_work(&local->scan_work);
 442                 }
 443                 flush_workqueue(local->hw.workqueue);
 444                 /* fall through */
 445         default:
 446                 conf.if_id = dev->ifindex;
 447                 conf.type = sdata->type;
 448                 conf.mac_addr = dev->dev_addr;
 449                 /* disable all keys for as long as this netdev is down */
 450                 ieee80211_disable_keys(sdata);
 451                 local->ops->remove_interface(local_to_hw(local), &conf);
 452         }
 453
 454         if (local->open_count == 0) {
 455                 if (netif_running(local->mdev))
 456                         dev_close(local->mdev);
 457
 458                 if (local->apdev)
 459                         dev_close(local->apdev);
 460
 461                 if (local->ops->stop)
 462                         local->ops->stop(local_to_hw(local));
 463
 464                 tasklet_disable(&local->tx_pending_tasklet);
 465                 tasklet_disable(&local->tasklet);
 466         }
 467
 468         return 0;
 469 }
 470
 471 static void ieee80211_set_multicast_list(struct net_device *dev)
 472 {
 473         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 474         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 475         int allmulti, promisc, sdata_allmulti, sdata_promisc;
 476
 477         allmulti = !!(dev->flags & IFF_ALLMULTI);
 478         promisc = !!(dev->flags & IFF_PROMISC);
 479         sdata_allmulti = sdata->flags & IEEE80211_SDATA_ALLMULTI;
 480         sdata_promisc = sdata->flags & IEEE80211_SDATA_PROMISC;
 481
 482         if (allmulti != sdata_allmulti) {
 483                 if (dev->flags & IFF_ALLMULTI)
 484                         local->iff_allmultis++;
 485                 else
 486                         local->iff_allmultis--;
 487                 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
 488         }
 489
 490         if (promisc != sdata_promisc) {
 491                 if (dev->flags & IFF_PROMISC)
 492                         local->iff_promiscs++;
 493                 else
 494                         local->iff_promiscs--;
 495                 sdata->flags ^= IEEE80211_SDATA_PROMISC;
 496         }
 497
 498         dev_mc_sync(local->mdev, dev);
 499 }
 500
 501 static const struct header_ops ieee80211_header_ops = {
 502         .create         = eth_header,
 503         .parse          = header_parse_80211,
 504         .rebuild        = eth_rebuild_header,
 505         .cache          = eth_header_cache,
 506         .cache_update   = eth_header_cache_update,
 507 };
 508
 509 /* Must not be called for mdev and apdev */
 510 void ieee80211_if_setup(struct net_device *dev)
 511 {
 512         ether_setup(dev);
 513         dev->header_ops = &ieee80211_header_ops;
 514         dev->hard_start_xmit = ieee80211_subif_start_xmit;
 515         dev->wireless_handlers = &ieee80211_iw_handler_def;
 516         dev->set_multicast_list = ieee80211_set_multicast_list;
 517         dev->change_mtu = ieee80211_change_mtu;
 518         dev->open = ieee80211_open;
 519         dev->stop = ieee80211_stop;
 520         dev->uninit = ieee80211_if_reinit;
 521         dev->destructor = ieee80211_if_free;
 522 }
 523
 524 /* WDS specialties */
 525
 526 int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr)
 527 {
 528         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 529         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 530         struct sta_info *sta;
 531         DECLARE_MAC_BUF(mac);
 532
 533         if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0)
 534                 return 0;
 535
 536         /* Create STA entry for the new peer */
 537         sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL);
 538         if (!sta)
 539                 return -ENOMEM;
 540         sta_info_put(sta);
 541
 542         /* Remove STA entry for the old peer */
 543         sta = sta_info_get(local, sdata->u.wds.remote_addr);
 544         if (sta) {
 545                 sta_info_free(sta);
 546                 sta_info_put(sta);
 547         } else {
 548                 printk(KERN_DEBUG "%s: could not find STA entry for WDS link "
 549                        "peer %s\n",
 550                        dev->name, print_mac(mac, sdata->u.wds.remote_addr));
 551         }
 552
 553         /* Update WDS link data */
 554         memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN);
 555
 556         return 0;
 557 }
 558
 559 /* everything else */
 560
 561 static int __ieee80211_if_config(struct net_device *dev,
 562                                  struct sk_buff *beacon,
 563                                  struct ieee80211_tx_control *control)
 564 {
 565         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 566         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 567         struct ieee80211_if_conf conf;
 568
 569         if (!local->ops->config_interface || !netif_running(dev))
 570                 return 0;
 571
 572         memset(&conf, 0, sizeof(conf));
 573         conf.type = sdata->type;
 574         if (sdata->type == IEEE80211_IF_TYPE_STA ||
 575             sdata->type == IEEE80211_IF_TYPE_IBSS) {
 576                 conf.bssid = sdata->u.sta.bssid;
 577                 conf.ssid = sdata->u.sta.ssid;
 578                 conf.ssid_len = sdata->u.sta.ssid_len;
 579                 conf.generic_elem = sdata->u.sta.extra_ie;
 580                 conf.generic_elem_len = sdata->u.sta.extra_ie_len;
 581         } else if (sdata->type == IEEE80211_IF_TYPE_AP) {
 582                 conf.ssid = sdata->u.ap.ssid;
 583                 conf.ssid_len = sdata->u.ap.ssid_len;
 584                 conf.generic_elem = sdata->u.ap.generic_elem;
 585                 conf.generic_elem_len = sdata->u.ap.generic_elem_len;
 586                 conf.beacon = beacon;
 587                 conf.beacon_control = control;
 588         }
 589         return local->ops->config_interface(local_to_hw(local),
 590                                            dev->ifindex, &conf);
 591 }
 592
 593 int ieee80211_if_config(struct net_device *dev)
 594 {
 595         return __ieee80211_if_config(dev, NULL, NULL);
 596 }
 597
 598 int ieee80211_if_config_beacon(struct net_device *dev)
 599 {
 600         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 601         struct ieee80211_tx_control control;
 602         struct sk_buff *skb;
 603
 604         if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
 605                 return 0;
 606         skb = ieee80211_beacon_get(local_to_hw(local), dev->ifindex, &control);
 607         if (!skb)
 608                 return -ENOMEM;
 609         return __ieee80211_if_config(dev, skb, &control);
 610 }
 611
 612 int ieee80211_hw_config(struct ieee80211_local *local)
 613 {
 614         struct ieee80211_hw_mode *mode;
 615         struct ieee80211_channel *chan;
 616         int ret = 0;
 617
 618         if (local->sta_scanning) {
 619                 chan = local->scan_channel;
 620                 mode = local->scan_hw_mode;
 621         } else {
 622                 chan = local->oper_channel;
 623                 mode = local->oper_hw_mode;
 624         }
 625
 626         local->hw.conf.channel = chan->chan;
 627         local->hw.conf.channel_val = chan->val;
 628         if (!local->hw.conf.power_level) {
 629                 local->hw.conf.power_level = chan->power_level;
 630         } else {
 631                 local->hw.conf.power_level = min(chan->power_level,
 632                                                  local->hw.conf.power_level);
 633         }
 634         local->hw.conf.freq = chan->freq;
 635         local->hw.conf.phymode = mode->mode;
 636         local->hw.conf.antenna_max = chan->antenna_max;
 637         local->hw.conf.chan = chan;
 638         local->hw.conf.mode = mode;
 639
 640 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 641         printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d "
 642                "phymode=%d\n", local->hw.conf.channel, local->hw.conf.freq,
 643                local->hw.conf.phymode);
 644 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
 645
 646         if (local->ops->config)
 647                 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
 648
 649         return ret;
 650 }
 651
 652 void ieee80211_erp_info_change_notify(struct net_device *dev, u8 changes)
 653 {
 654         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 655         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 656         if (local->ops->erp_ie_changed)
 657                 local->ops->erp_ie_changed(local_to_hw(local), changes,
 658                         !!(sdata->flags & IEEE80211_SDATA_USE_PROTECTION),
 659                         !(sdata->flags & IEEE80211_SDATA_SHORT_PREAMBLE));
 660 }
 661
 662 void ieee80211_reset_erp_info(struct net_device *dev)
 663 {
 664         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 665
 666         sdata->flags &= ~(IEEE80211_SDATA_USE_PROTECTION |
 667                         IEEE80211_SDATA_SHORT_PREAMBLE);
 668         ieee80211_erp_info_change_notify(dev,
 669                                          IEEE80211_ERP_CHANGE_PROTECTION |
 670                                          IEEE80211_ERP_CHANGE_PREAMBLE);
 671 }
 672
 673 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
 674                                  struct sk_buff *skb,
 675                                  struct ieee80211_tx_status *status)
 676 {
 677         struct ieee80211_local *local = hw_to_local(hw);
 678         struct ieee80211_tx_status *saved;
 679         int tmp;
 680
 681         skb->dev = local->mdev;
 682         saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC);
 683         if (unlikely(!saved)) {
 684                 if (net_ratelimit())
 685                         printk(KERN_WARNING "%s: Not enough memory, "
 686                                "dropping tx status", skb->dev->name);
 687                 /* should be dev_kfree_skb_irq, but due to this function being
 688                  * named _irqsafe instead of just _irq we can't be sure that
 689                  * people won't call it from non-irq contexts */
 690                 dev_kfree_skb_any(skb);
 691                 return;
 692         }
 693         memcpy(saved, status, sizeof(struct ieee80211_tx_status));
 694         /* copy pointer to saved status into skb->cb for use by tasklet */
 695         memcpy(skb->cb, &saved, sizeof(saved));
 696
 697         skb->pkt_type = IEEE80211_TX_STATUS_MSG;
 698         skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ?
 699                        &local->skb_queue : &local->skb_queue_unreliable, skb);
 700         tmp = skb_queue_len(&local->skb_queue) +
 701                 skb_queue_len(&local->skb_queue_unreliable);
 702         while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
 703                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 704                 memcpy(&saved, skb->cb, sizeof(saved));
 705                 kfree(saved);
 706                 dev_kfree_skb_irq(skb);
 707                 tmp--;
 708                 I802_DEBUG_INC(local->tx_status_drop);
 709         }
 710         tasklet_schedule(&local->tasklet);
 711 }
 712 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
 713
 714 static void ieee80211_tasklet_handler(unsigned long data)
 715 {
 716         struct ieee80211_local *local = (struct ieee80211_local *) data;
 717         struct sk_buff *skb;
 718         struct ieee80211_rx_status rx_status;
 719         struct ieee80211_tx_status *tx_status;
 720
 721         while ((skb = skb_dequeue(&local->skb_queue)) ||
 722                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 723                 switch (skb->pkt_type) {
 724                 case IEEE80211_RX_MSG:
 725                         /* status is in skb->cb */
 726                         memcpy(&rx_status, skb->cb, sizeof(rx_status));
 727                         /* Clear skb->type in order to not confuse kernel
 728                          * netstack. */
 729                         skb->pkt_type = 0;
 730                         __ieee80211_rx(local_to_hw(local), skb, &rx_status);
 731                         break;
 732                 case IEEE80211_TX_STATUS_MSG:
 733                         /* get pointer to saved status out of skb->cb */
 734                         memcpy(&tx_status, skb->cb, sizeof(tx_status));
 735                         skb->pkt_type = 0;
 736                         ieee80211_tx_status(local_to_hw(local),
 737                                             skb, tx_status);
 738                         kfree(tx_status);
 739                         break;
 740                 default: /* should never get here! */
 741                         printk(KERN_ERR "%s: Unknown message type (%d)\n",
 742                                wiphy_name(local->hw.wiphy), skb->pkt_type);
 743                         dev_kfree_skb(skb);
 744                         break;
 745                 }
 746         }
 747 }
 748
 749 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
 750  * make a prepared TX frame (one that has been given to hw) to look like brand
 751  * new IEEE 802.11 frame that is ready to go through TX processing again.
 752  * Also, tx_packet_data in cb is restored from tx_control. */
 753 static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
 754                                       struct ieee80211_key *key,
 755                                       struct sk_buff *skb,
 756                                       struct ieee80211_tx_control *control)
 757 {
 758         int hdrlen, iv_len, mic_len;
 759         struct ieee80211_tx_packet_data *pkt_data;
 760
 761         pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
 762         pkt_data->ifindex = control->ifindex;
 763         pkt_data->flags = 0;
 764         if (control->flags & IEEE80211_TXCTL_REQ_TX_STATUS)
 765                 pkt_data->flags |= IEEE80211_TXPD_REQ_TX_STATUS;
 766         if (control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT)
 767                 pkt_data->flags |= IEEE80211_TXPD_DO_NOT_ENCRYPT;
 768         if (control->flags & IEEE80211_TXCTL_REQUEUE)
 769                 pkt_data->flags |= IEEE80211_TXPD_REQUEUE;
 770         if (control->type == IEEE80211_IF_TYPE_MGMT)
 771                 pkt_data->flags |= IEEE80211_TXPD_MGMT_IFACE;
 772         pkt_data->queue = control->queue;
 773
 774         hdrlen = ieee80211_get_hdrlen_from_skb(skb);
 775
 776         if (!key)
 777                 goto no_key;
 778
 779         switch (key->conf.alg) {
 780         case ALG_WEP:
 781                 iv_len = WEP_IV_LEN;
 782                 mic_len = WEP_ICV_LEN;
 783                 break;
 784         case ALG_TKIP:
 785                 iv_len = TKIP_IV_LEN;
 786                 mic_len = TKIP_ICV_LEN;
 787                 break;
 788         case ALG_CCMP:
 789                 iv_len = CCMP_HDR_LEN;
 790                 mic_len = CCMP_MIC_LEN;
 791                 break;
 792         default:
 793                 goto no_key;
 794         }
 795
 796         if (skb->len >= mic_len &&
 797             !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
 798                 skb_trim(skb, skb->len - mic_len);
 799         if (skb->len >= iv_len && skb->len > hdrlen) {
 800                 memmove(skb->data + iv_len, skb->data, hdrlen);
 801                 skb_pull(skb, iv_len);
 802         }
 803
 804 no_key:
 805         {
 806                 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 807                 u16 fc = le16_to_cpu(hdr->frame_control);
 808                 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
 809                         fc &= ~IEEE80211_STYPE_QOS_DATA;
 810                         hdr->frame_control = cpu_to_le16(fc);
 811                         memmove(skb->data + 2, skb->data, hdrlen - 2);
 812                         skb_pull(skb, 2);
 813                 }
 814         }
 815 }
 816
 817 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
 818                          struct ieee80211_tx_status *status)
 819 {
 820         struct sk_buff *skb2;
 821         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 822         struct ieee80211_local *local = hw_to_local(hw);
 823         u16 frag, type;
 824         u32 msg_type;
 825         struct ieee80211_tx_status_rtap_hdr *rthdr;
 826         struct ieee80211_sub_if_data *sdata;
 827         int monitors;
 828
 829         if (!status) {
 830                 printk(KERN_ERR
 831                        "%s: ieee80211_tx_status called with NULL status\n",
 832                        wiphy_name(local->hw.wiphy));
 833                 dev_kfree_skb(skb);
 834                 return;
 835         }
 836
 837         if (status->excessive_retries) {
 838                 struct sta_info *sta;
 839                 sta = sta_info_get(local, hdr->addr1);
 840                 if (sta) {
 841                         if (sta->flags & WLAN_STA_PS) {
 842                                 /* The STA is in power save mode, so assume
 843                                  * that this TX packet failed because of that.
 844                                  */
 845                                 status->excessive_retries = 0;
 846                                 status->flags |= IEEE80211_TX_STATUS_TX_FILTERED;
 847                         }
 848                         sta_info_put(sta);
 849                 }
 850         }
 851
 852         if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
 853                 struct sta_info *sta;
 854                 sta = sta_info_get(local, hdr->addr1);
 855                 if (sta) {
 856                         sta->tx_filtered_count++;
 857
 858                         /* Clear the TX filter mask for this STA when sending
 859                          * the next packet. If the STA went to power save mode,
 860                          * this will happen when it is waking up for the next
 861                          * time. */
 862                         sta->clear_dst_mask = 1;
 863
 864                         /* TODO: Is the WLAN_STA_PS flag always set here or is
 865                          * the race between RX and TX status causing some
 866                          * packets to be filtered out before 80211.o gets an
 867                          * update for PS status? This seems to be the case, so
 868                          * no changes are likely to be needed. */
 869                         if (sta->flags & WLAN_STA_PS &&
 870                             skb_queue_len(&sta->tx_filtered) <
 871                             STA_MAX_TX_BUFFER) {
 872                                 ieee80211_remove_tx_extra(local, sta->key,
 873                                                           skb,
 874                                                           &status->control);
 875                                 skb_queue_tail(&sta->tx_filtered, skb);
 876                         } else if (!(sta->flags & WLAN_STA_PS) &&
 877                                    !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) {
 878                                 /* Software retry the packet once */
 879                                 status->control.flags |= IEEE80211_TXCTL_REQUEUE;
 880                                 ieee80211_remove_tx_extra(local, sta->key,
 881                                                           skb,
 882                                                           &status->control);
 883                                 dev_queue_xmit(skb);
 884                         } else {
 885                                 if (net_ratelimit()) {
 886                                         printk(KERN_DEBUG "%s: dropped TX "
 887                                                "filtered frame queue_len=%d "
 888                                                "PS=%d @%lu\n",
 889                                                wiphy_name(local->hw.wiphy),
 890                                                skb_queue_len(
 891                                                        &sta->tx_filtered),
 892                                                !!(sta->flags & WLAN_STA_PS),
 893                                                jiffies);
 894                                 }
 895                                 dev_kfree_skb(skb);
 896                         }
 897                         sta_info_put(sta);
 898                         return;
 899                 }
 900         } else {
 901                 /* FIXME: STUPID to call this with both local and local->mdev */
 902                 rate_control_tx_status(local, local->mdev, skb, status);
 903         }
 904
 905         ieee80211_led_tx(local, 0);
 906
 907         /* SNMP counters
 908          * Fragments are passed to low-level drivers as separate skbs, so these
 909          * are actually fragments, not frames. Update frame counters only for
 910          * the first fragment of the frame. */
 911
 912         frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
 913         type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
 914
 915         if (status->flags & IEEE80211_TX_STATUS_ACK) {
 916                 if (frag == 0) {
 917                         local->dot11TransmittedFrameCount++;
 918                         if (is_multicast_ether_addr(hdr->addr1))
 919                                 local->dot11MulticastTransmittedFrameCount++;
 920                         if (status->retry_count > 0)
 921                                 local->dot11RetryCount++;
 922                         if (status->retry_count > 1)
 923                                 local->dot11MultipleRetryCount++;
 924                 }
 925
 926                 /* This counter shall be incremented for an acknowledged MPDU
 927                  * with an individual address in the address 1 field or an MPDU
 928                  * with a multicast address in the address 1 field of type Data
 929                  * or Management. */
 930                 if (!is_multicast_ether_addr(hdr->addr1) ||
 931                     type == IEEE80211_FTYPE_DATA ||
 932                     type == IEEE80211_FTYPE_MGMT)
 933                         local->dot11TransmittedFragmentCount++;
 934         } else {
 935                 if (frag == 0)
 936                         local->dot11FailedCount++;
 937         }
 938
 939         msg_type = (status->flags & IEEE80211_TX_STATUS_ACK) ?
 940                 ieee80211_msg_tx_callback_ack : ieee80211_msg_tx_callback_fail;
 941
 942         /* this was a transmitted frame, but now we want to reuse it */
 943         skb_orphan(skb);
 944
 945         if ((status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS) &&
 946             local->apdev) {
 947                 if (local->monitors) {
 948                         skb2 = skb_clone(skb, GFP_ATOMIC);
 949                 } else {
 950                         skb2 = skb;
 951                         skb = NULL;
 952                 }
 953
 954                 if (skb2)
 955                         /* Send frame to hostapd */
 956                         ieee80211_rx_mgmt(local, skb2, NULL, msg_type);
 957
 958                 if (!skb)
 959                         return;
 960         }
 961
 962         if (!local->monitors) {
 963                 dev_kfree_skb(skb);
 964                 return;
 965         }
 966
 967         /* send frame to monitor interfaces now */
 968
 969         if (skb_headroom(skb) < sizeof(*rthdr)) {
 970                 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
 971                 dev_kfree_skb(skb);
 972                 return;
 973         }
 974
 975         rthdr = (struct ieee80211_tx_status_rtap_hdr*)
 976                                 skb_push(skb, sizeof(*rthdr));
 977
 978         memset(rthdr, 0, sizeof(*rthdr));
 979         rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
 980         rthdr->hdr.it_present =
 981                 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
 982                             (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
 983
 984         if (!(status->flags & IEEE80211_TX_STATUS_ACK) &&
 985             !is_multicast_ether_addr(hdr->addr1))
 986                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
 987
 988         if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) &&
 989             (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT))
 990                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
 991         else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS)
 992                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
 993
 994         rthdr->data_retries = status->retry_count;
 995
 996         read_lock(&local->sub_if_lock);
 997         monitors = local->monitors;
 998         list_for_each_entry(sdata, &local->sub_if_list, list) {
 999                 /*
1000                  * Using the monitors counter is possibly racy, but
1001                  * if the value is wrong we simply either clone the skb
1002                  * once too much or forget sending it to one monitor iface
1003                  * The latter case isn't nice but fixing the race is much
1004                  * more complicated.
1005                  */
1006                 if (!monitors || !skb)
1007                         goto out;
1008
1009                 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
1010                         if (!netif_running(sdata->dev))
1011                                 continue;
1012                         monitors--;
1013                         if (monitors)
1014                                 skb2 = skb_clone(skb, GFP_KERNEL);
1015                         else
1016                                 skb2 = NULL;
1017                         skb->dev = sdata->dev;
1018                         /* XXX: is this sufficient for BPF? */
1019                         skb_set_mac_header(skb, 0);
1020                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1021                         skb->pkt_type = PACKET_OTHERHOST;
1022                         skb->protocol = htons(ETH_P_802_2);
1023                         memset(skb->cb, 0, sizeof(skb->cb));
1024                         netif_rx(skb);
1025                         skb = skb2;
1026                 }
1027         }
1028  out:
1029         read_unlock(&local->sub_if_lock);
1030         if (skb)
1031                 dev_kfree_skb(skb);
1032 }
1033 EXPORT_SYMBOL(ieee80211_tx_status);
1034
1035 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
1036                                         const struct ieee80211_ops *ops)
1037 {
1038         struct net_device *mdev;
1039         struct ieee80211_local *local;
1040         struct ieee80211_sub_if_data *sdata;
1041         int priv_size;
1042         struct wiphy *wiphy;
1043
1044         /* Ensure 32-byte alignment of our private data and hw private data.
1045          * We use the wiphy priv data for both our ieee80211_local and for
1046          * the driver's private data
1047          *
1048          * In memory it'll be like this:
1049          *
1050          * +-------------------------+
1051          * | struct wiphy           |
1052          * +-------------------------+
1053          * | struct ieee80211_local  |
1054          * +-------------------------+
1055          * | driver's private data   |
1056          * +-------------------------+
1057          *
1058          */
1059         priv_size = ((sizeof(struct ieee80211_local) +
1060                       NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1061                     priv_data_len;
1062
1063         wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1064
1065         if (!wiphy)
1066                 return NULL;
1067
1068         wiphy->privid = mac80211_wiphy_privid;
1069
1070         local = wiphy_priv(wiphy);
1071         local->hw.wiphy = wiphy;
1072
1073         local->hw.priv = (char *)local +
1074                          ((sizeof(struct ieee80211_local) +
1075                            NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1076
1077         BUG_ON(!ops->tx);
1078         BUG_ON(!ops->start);
1079         BUG_ON(!ops->stop);
1080         BUG_ON(!ops->config);
1081         BUG_ON(!ops->add_interface);
1082         BUG_ON(!ops->remove_interface);
1083         BUG_ON(!ops->configure_filter);
1084         local->ops = ops;
1085
1086         /* for now, mdev needs sub_if_data :/ */
1087         mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
1088                             "wmaster%d", ether_setup);
1089         if (!mdev) {
1090                 wiphy_free(wiphy);
1091                 return NULL;
1092         }
1093
1094         sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
1095         mdev->ieee80211_ptr = &sdata->wdev;
1096         sdata->wdev.wiphy = wiphy;
1097
1098         local->hw.queues = 1; /* default */
1099
1100         local->mdev = mdev;
1101         local->rx_pre_handlers = ieee80211_rx_pre_handlers;
1102         local->rx_handlers = ieee80211_rx_handlers;
1103         local->tx_handlers = ieee80211_tx_handlers;
1104
1105         local->bridge_packets = 1;
1106
1107         local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1108         local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1109         local->short_retry_limit = 7;
1110         local->long_retry_limit = 4;
1111         local->hw.conf.radio_enabled = 1;
1112
1113         local->enabled_modes = ~0;
1114
1115         INIT_LIST_HEAD(&local->modes_list);
1116
1117         rwlock_init(&local->sub_if_lock);
1118         INIT_LIST_HEAD(&local->sub_if_list);
1119
1120         INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
1121         ieee80211_rx_bss_list_init(mdev);
1122
1123         sta_info_init(local);
1124
1125         mdev->hard_start_xmit = ieee80211_master_start_xmit;
1126         mdev->open = ieee80211_master_open;
1127         mdev->stop = ieee80211_master_stop;
1128         mdev->type = ARPHRD_IEEE80211;
1129         mdev->header_ops = &ieee80211_header_ops;
1130         mdev->set_multicast_list = ieee80211_master_set_multicast_list;
1131
1132         sdata->type = IEEE80211_IF_TYPE_AP;
1133         sdata->dev = mdev;
1134         sdata->local = local;
1135         sdata->u.ap.force_unicast_rateidx = -1;
1136         sdata->u.ap.max_ratectrl_rateidx = -1;
1137         ieee80211_if_sdata_init(sdata);
1138         list_add_tail(&sdata->list, &local->sub_if_list);
1139
1140         tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1141                      (unsigned long)local);
1142         tasklet_disable(&local->tx_pending_tasklet);
1143
1144         tasklet_init(&local->tasklet,
1145                      ieee80211_tasklet_handler,
1146                      (unsigned long) local);
1147         tasklet_disable(&local->tasklet);
1148
1149         skb_queue_head_init(&local->skb_queue);
1150         skb_queue_head_init(&local->skb_queue_unreliable);
1151
1152         return local_to_hw(local);
1153 }
1154 EXPORT_SYMBOL(ieee80211_alloc_hw);
1155
1156 int ieee80211_register_hw(struct ieee80211_hw *hw)
1157 {
1158         struct ieee80211_local *local = hw_to_local(hw);
1159         const char *name;
1160         int result;
1161
1162         result = wiphy_register(local->hw.wiphy);
1163         if (result < 0)
1164                 return result;
1165
1166         name = wiphy_dev(local->hw.wiphy)->driver->name;
1167         local->hw.workqueue = create_singlethread_workqueue(name);
1168         if (!local->hw.workqueue) {
1169                 result = -ENOMEM;
1170                 goto fail_workqueue;
1171         }
1172
1173         /*
1174          * The hardware needs headroom for sending the frame,
1175          * and we need some headroom for passing the frame to monitor
1176          * interfaces, but never both at the same time.
1177          */
1178         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1179                                    sizeof(struct ieee80211_tx_status_rtap_hdr));
1180
1181         debugfs_hw_add(local);
1182
1183         local->hw.conf.beacon_int = 1000;
1184
1185         local->wstats_flags |= local->hw.max_rssi ?
1186                                IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID;
1187         local->wstats_flags |= local->hw.max_signal ?
1188                                IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1189         local->wstats_flags |= local->hw.max_noise ?
1190                                IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1191         if (local->hw.max_rssi < 0 || local->hw.max_noise < 0)
1192                 local->wstats_flags |= IW_QUAL_DBM;
1193
1194         result = sta_info_start(local);
1195         if (result < 0)
1196                 goto fail_sta_info;
1197
1198         rtnl_lock();
1199         result = dev_alloc_name(local->mdev, local->mdev->name);
1200         if (result < 0)
1201                 goto fail_dev;
1202
1203         memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1204         SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1205
1206         result = register_netdevice(local->mdev);
1207         if (result < 0)
1208                 goto fail_dev;
1209
1210         ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1211
1212         result = ieee80211_init_rate_ctrl_alg(local, NULL);
1213         if (result < 0) {
1214                 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1215                        "algorithm\n", wiphy_name(local->hw.wiphy));
1216                 goto fail_rate;
1217         }
1218
1219         result = ieee80211_wep_init(local);
1220
1221         if (result < 0) {
1222                 printk(KERN_DEBUG "%s: Failed to initialize wep\n",
1223                        wiphy_name(local->hw.wiphy));
1224                 goto fail_wep;
1225         }
1226
1227         ieee80211_install_qdisc(local->mdev);
1228
1229         /* add one default STA interface */
1230         result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
1231                                   IEEE80211_IF_TYPE_STA);
1232         if (result)
1233                 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1234                        wiphy_name(local->hw.wiphy));
1235
1236         local->reg_state = IEEE80211_DEV_REGISTERED;
1237         rtnl_unlock();
1238
1239         ieee80211_led_init(local);
1240
1241         return 0;
1242
1243 fail_wep:
1244         rate_control_deinitialize(local);
1245 fail_rate:
1246         ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1247         unregister_netdevice(local->mdev);
1248 fail_dev:
1249         rtnl_unlock();
1250         sta_info_stop(local);
1251 fail_sta_info:
1252         debugfs_hw_del(local);
1253         destroy_workqueue(local->hw.workqueue);
1254 fail_workqueue:
1255         wiphy_unregister(local->hw.wiphy);
1256         return result;
1257 }
1258 EXPORT_SYMBOL(ieee80211_register_hw);
1259
1260 int ieee80211_register_hwmode(struct ieee80211_hw *hw,
1261                               struct ieee80211_hw_mode *mode)
1262 {
1263         struct ieee80211_local *local = hw_to_local(hw);
1264         struct ieee80211_rate *rate;
1265         int i;
1266
1267         INIT_LIST_HEAD(&mode->list);
1268         list_add_tail(&mode->list, &local->modes_list);
1269
1270         local->hw_modes |= (1 << mode->mode);
1271         for (i = 0; i < mode->num_rates; i++) {
1272                 rate = &(mode->rates[i]);
1273                 rate->rate_inv = CHAN_UTIL_RATE_LCM / rate->rate;
1274         }
1275         ieee80211_prepare_rates(local, mode);
1276
1277         if (!local->oper_hw_mode) {
1278                 /* Default to this mode */
1279                 local->hw.conf.phymode = mode->mode;
1280                 local->oper_hw_mode = local->scan_hw_mode = mode;
1281                 local->oper_channel = local->scan_channel = &mode->channels[0];
1282                 local->hw.conf.mode = local->oper_hw_mode;
1283                 local->hw.conf.chan = local->oper_channel;
1284         }
1285
1286         if (!(hw->flags & IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED))
1287                 ieee80211_set_default_regdomain(mode);
1288
1289         return 0;
1290 }
1291 EXPORT_SYMBOL(ieee80211_register_hwmode);
1292
1293 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1294 {
1295         struct ieee80211_local *local = hw_to_local(hw);
1296         struct ieee80211_sub_if_data *sdata, *tmp;
1297         struct list_head tmp_list;
1298         int i;
1299
1300         tasklet_kill(&local->tx_pending_tasklet);
1301         tasklet_kill(&local->tasklet);
1302
1303         rtnl_lock();
1304
1305         BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
1306
1307         local->reg_state = IEEE80211_DEV_UNREGISTERED;
1308         if (local->apdev)
1309                 ieee80211_if_del_mgmt(local);
1310
1311         write_lock_bh(&local->sub_if_lock);
1312         list_replace_init(&local->sub_if_list, &tmp_list);
1313         write_unlock_bh(&local->sub_if_lock);
1314
1315         list_for_each_entry_safe(sdata, tmp, &tmp_list, list)
1316                 __ieee80211_if_del(local, sdata);
1317
1318         rtnl_unlock();
1319
1320         ieee80211_rx_bss_list_deinit(local->mdev);
1321         ieee80211_clear_tx_pending(local);
1322         sta_info_stop(local);
1323         rate_control_deinitialize(local);
1324         debugfs_hw_del(local);
1325
1326         for (i = 0; i < NUM_IEEE80211_MODES; i++) {
1327                 kfree(local->supp_rates[i]);
1328                 kfree(local->basic_rates[i]);
1329         }
1330
1331         if (skb_queue_len(&local->skb_queue)
1332                         || skb_queue_len(&local->skb_queue_unreliable))
1333                 printk(KERN_WARNING "%s: skb_queue not empty\n",
1334                        wiphy_name(local->hw.wiphy));
1335         skb_queue_purge(&local->skb_queue);
1336         skb_queue_purge(&local->skb_queue_unreliable);
1337
1338         destroy_workqueue(local->hw.workqueue);
1339         wiphy_unregister(local->hw.wiphy);
1340         ieee80211_wep_free(local);
1341         ieee80211_led_exit(local);
1342 }
1343 EXPORT_SYMBOL(ieee80211_unregister_hw);
1344
1345 void ieee80211_free_hw(struct ieee80211_hw *hw)
1346 {
1347         struct ieee80211_local *local = hw_to_local(hw);
1348
1349         ieee80211_if_free(local->mdev);
1350         wiphy_free(local->hw.wiphy);
1351 }
1352 EXPORT_SYMBOL(ieee80211_free_hw);
1353
1354 static int __init ieee80211_init(void)
1355 {
1356         struct sk_buff *skb;
1357         int ret;
1358
1359         BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb));
1360
1361         ret = ieee80211_wme_register();
1362         if (ret) {
1363                 printk(KERN_DEBUG "ieee80211_init: failed to "
1364                        "initialize WME (err=%d)\n", ret);
1365                 return ret;
1366         }
1367
1368         ieee80211_debugfs_netdev_init();
1369         ieee80211_regdomain_init();
1370
1371         return 0;
1372 }
1373
1374 static void __exit ieee80211_exit(void)
1375 {
1376         ieee80211_wme_unregister();
1377         ieee80211_debugfs_netdev_exit();
1378 }
1379
1380
1381 subsys_initcall(ieee80211_init);
1382 module_exit(ieee80211_exit);
1383
1384 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1385 MODULE_LICENSE("GPL");