net/mac80211/ieee80211.c

   1 /*
   2  * Copyright 2002-2005, Instant802 Networks, Inc.
   3  * Copyright 2005-2006, Devicescape Software, Inc.
   4  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #include <net/mac80211.h>
  12 #include <net/ieee80211_radiotap.h>
  13 #include <linux/module.h>
  14 #include <linux/init.h>
  15 #include <linux/netdevice.h>
  16 #include <linux/types.h>
  17 #include <linux/slab.h>
  18 #include <linux/skbuff.h>
  19 #include <linux/etherdevice.h>
  20 #include <linux/if_arp.h>
  21 #include <linux/wireless.h>
  22 #include <linux/rtnetlink.h>
  23 #include <linux/bitmap.h>
  24 #include <net/cfg80211.h>
  25
  26 #include "ieee80211_common.h"
  27 #include "ieee80211_i.h"
  28 #include "ieee80211_rate.h"
  29 #include "wep.h"
  30 #include "wme.h"
  31 #include "aes_ccm.h"
  32 #include "ieee80211_led.h"
  33 #include "ieee80211_cfg.h"
  34 #include "debugfs.h"
  35 #include "debugfs_netdev.h"
  36
  37 /*
  38  * For seeing transmitted packets on monitor interfaces
  39  * we have a radiotap header too.
  40  */
  41 struct ieee80211_tx_status_rtap_hdr {
  42         struct ieee80211_radiotap_header hdr;
  43         __le16 tx_flags;
  44         u8 data_retries;
  45 } __attribute__ ((packed));
  46
  47 /* common interface routines */
  48
  49 static struct net_device_stats *ieee80211_get_stats(struct net_device *dev)
  50 {
  51         struct ieee80211_sub_if_data *sdata;
  52         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
  53         return &(sdata->stats);
  54 }
  55
  56 static int header_parse_80211(struct sk_buff *skb, unsigned char *haddr)
  57 {
  58         memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
  59         return ETH_ALEN;
  60 }
  61
  62 /* master interface */
  63
  64 static int ieee80211_master_open(struct net_device *dev)
  65 {
  66         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
  67         struct ieee80211_sub_if_data *sdata;
  68         int res = -EOPNOTSUPP;
  69
  70         read_lock(&local->sub_if_lock);
  71         list_for_each_entry(sdata, &local->sub_if_list, list) {
  72                 if (sdata->dev != dev && netif_running(sdata->dev)) {
  73                         res = 0;
  74                         break;
  75                 }
  76         }
  77         read_unlock(&local->sub_if_lock);
  78         return res;
  79 }
  80
  81 static int ieee80211_master_stop(struct net_device *dev)
  82 {
  83         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
  84         struct ieee80211_sub_if_data *sdata;
  85
  86         read_lock(&local->sub_if_lock);
  87         list_for_each_entry(sdata, &local->sub_if_list, list)
  88                 if (sdata->dev != dev && netif_running(sdata->dev))
  89                         dev_close(sdata->dev);
  90         read_unlock(&local->sub_if_lock);
  91
  92         return 0;
  93 }
  94
  95 /* management interface */
  96
  97 static void
  98 ieee80211_fill_frame_info(struct ieee80211_local *local,
  99                           struct ieee80211_frame_info *fi,
 100                           struct ieee80211_rx_status *status)
 101 {
 102         if (status) {
 103                 struct timespec ts;
 104                 struct ieee80211_rate *rate;
 105
 106                 jiffies_to_timespec(jiffies, &ts);
 107                 fi->hosttime = cpu_to_be64((u64) ts.tv_sec * 1000000 +
 108                                            ts.tv_nsec / 1000);
 109                 fi->mactime = cpu_to_be64(status->mactime);
 110                 switch (status->phymode) {
 111                 case MODE_IEEE80211A:
 112                         fi->phytype = htonl(ieee80211_phytype_ofdm_dot11_a);
 113                         break;
 114                 case MODE_IEEE80211B:
 115                         fi->phytype = htonl(ieee80211_phytype_dsss_dot11_b);
 116                         break;
 117                 case MODE_IEEE80211G:
 118                         fi->phytype = htonl(ieee80211_phytype_pbcc_dot11_g);
 119                         break;
 120                 case MODE_ATHEROS_TURBO:
 121                         fi->phytype =
 122                                 htonl(ieee80211_phytype_dsss_dot11_turbo);
 123                         break;
 124                 default:
 125                         fi->phytype = htonl(0xAAAAAAAA);
 126                         break;
 127                 }
 128                 fi->channel = htonl(status->channel);
 129                 rate = ieee80211_get_rate(local, status->phymode,
 130                                           status->rate);
 131                 if (rate) {
 132                         fi->datarate = htonl(rate->rate);
 133                         if (rate->flags & IEEE80211_RATE_PREAMBLE2) {
 134                                 if (status->rate == rate->val)
 135                                         fi->preamble = htonl(2); /* long */
 136                                 else if (status->rate == rate->val2)
 137                                         fi->preamble = htonl(1); /* short */
 138                         } else
 139                                 fi->preamble = htonl(0);
 140                 } else {
 141                         fi->datarate = htonl(0);
 142                         fi->preamble = htonl(0);
 143                 }
 144
 145                 fi->antenna = htonl(status->antenna);
 146                 fi->priority = htonl(0xffffffff); /* no clue */
 147                 fi->ssi_type = htonl(ieee80211_ssi_raw);
 148                 fi->ssi_signal = htonl(status->ssi);
 149                 fi->ssi_noise = 0x00000000;
 150                 fi->encoding = 0;
 151         } else {
 152                 /* clear everything because we really don't know.
 153                  * the msg_type field isn't present on monitor frames
 154                  * so we don't know whether it will be present or not,
 155                  * but it's ok to not clear it since it'll be assigned
 156                  * anyway */
 157                 memset(fi, 0, sizeof(*fi) - sizeof(fi->msg_type));
 158
 159                 fi->ssi_type = htonl(ieee80211_ssi_none);
 160         }
 161         fi->version = htonl(IEEE80211_FI_VERSION);
 162         fi->length = cpu_to_be32(sizeof(*fi) - sizeof(fi->msg_type));
 163 }
 164
 165 /* this routine is actually not just for this, but also
 166  * for pushing fake 'management' frames into userspace.
 167  * it shall be replaced by a netlink-based system. */
 168 void
 169 ieee80211_rx_mgmt(struct ieee80211_local *local, struct sk_buff *skb,
 170                   struct ieee80211_rx_status *status, u32 msg_type)
 171 {
 172         struct ieee80211_frame_info *fi;
 173         const size_t hlen = sizeof(struct ieee80211_frame_info);
 174         struct ieee80211_sub_if_data *sdata;
 175
 176         skb->dev = local->apdev;
 177
 178         sdata = IEEE80211_DEV_TO_SUB_IF(local->apdev);
 179
 180         if (skb_headroom(skb) < hlen) {
 181                 I802_DEBUG_INC(local->rx_expand_skb_head);
 182                 if (pskb_expand_head(skb, hlen, 0, GFP_ATOMIC)) {
 183                         dev_kfree_skb(skb);
 184                         return;
 185                 }
 186         }
 187
 188         fi = (struct ieee80211_frame_info *) skb_push(skb, hlen);
 189
 190         ieee80211_fill_frame_info(local, fi, status);
 191         fi->msg_type = htonl(msg_type);
 192
 193         sdata->stats.rx_packets++;
 194         sdata->stats.rx_bytes += skb->len;
 195
 196         skb_set_mac_header(skb, 0);
 197         skb->ip_summed = CHECKSUM_UNNECESSARY;
 198         skb->pkt_type = PACKET_OTHERHOST;
 199         skb->protocol = htons(ETH_P_802_2);
 200         memset(skb->cb, 0, sizeof(skb->cb));
 201         netif_rx(skb);
 202 }
 203
 204 int ieee80211_radar_status(struct ieee80211_hw *hw, int channel,
 205                            int radar, int radar_type)
 206 {
 207         struct sk_buff *skb;
 208         struct ieee80211_radar_info *msg;
 209         struct ieee80211_local *local = hw_to_local(hw);
 210
 211         if (!local->apdev)
 212                 return 0;
 213
 214         skb = dev_alloc_skb(sizeof(struct ieee80211_frame_info) +
 215                             sizeof(struct ieee80211_radar_info));
 216
 217         if (!skb)
 218                 return -ENOMEM;
 219         skb_reserve(skb, sizeof(struct ieee80211_frame_info));
 220
 221         msg = (struct ieee80211_radar_info *)
 222                 skb_put(skb, sizeof(struct ieee80211_radar_info));
 223         msg->channel = channel;
 224         msg->radar = radar;
 225         msg->radar_type = radar_type;
 226
 227         ieee80211_rx_mgmt(local, skb, NULL, ieee80211_msg_radar);
 228         return 0;
 229 }
 230 EXPORT_SYMBOL(ieee80211_radar_status);
 231
 232 void ieee80211_key_threshold_notify(struct net_device *dev,
 233                                     struct ieee80211_key *key,
 234                                     struct sta_info *sta)
 235 {
 236         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 237         struct sk_buff *skb;
 238         struct ieee80211_msg_key_notification *msg;
 239
 240         /* if no one will get it anyway, don't even allocate it.
 241          * unlikely because this is only relevant for APs
 242          * where the device must be open... */
 243         if (unlikely(!local->apdev))
 244                 return;
 245
 246         skb = dev_alloc_skb(sizeof(struct ieee80211_frame_info) +
 247                             sizeof(struct ieee80211_msg_key_notification));
 248         if (!skb)
 249                 return;
 250
 251         skb_reserve(skb, sizeof(struct ieee80211_frame_info));
 252         msg = (struct ieee80211_msg_key_notification *)
 253                 skb_put(skb, sizeof(struct ieee80211_msg_key_notification));
 254         msg->tx_rx_count = key->tx_rx_count;
 255         memcpy(msg->ifname, dev->name, IFNAMSIZ);
 256         if (sta)
 257                 memcpy(msg->addr, sta->addr, ETH_ALEN);
 258         else
 259                 memset(msg->addr, 0xff, ETH_ALEN);
 260
 261         key->tx_rx_count = 0;
 262
 263         ieee80211_rx_mgmt(local, skb, NULL,
 264                           ieee80211_msg_key_threshold_notification);
 265 }
 266
 267 static int ieee80211_mgmt_open(struct net_device *dev)
 268 {
 269         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 270
 271         if (!netif_running(local->mdev))
 272                 return -EOPNOTSUPP;
 273         return 0;
 274 }
 275
 276 static int ieee80211_mgmt_stop(struct net_device *dev)
 277 {
 278         return 0;
 279 }
 280
 281 static int ieee80211_change_mtu_apdev(struct net_device *dev, int new_mtu)
 282 {
 283         /* FIX: what would be proper limits for MTU?
 284          * This interface uses 802.11 frames. */
 285         if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN) {
 286                 printk(KERN_WARNING "%s: invalid MTU %d\n",
 287                        dev->name, new_mtu);
 288                 return -EINVAL;
 289         }
 290
 291 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 292         printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
 293 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
 294         dev->mtu = new_mtu;
 295         return 0;
 296 }
 297
 298 void ieee80211_if_mgmt_setup(struct net_device *dev)
 299 {
 300         ether_setup(dev);
 301         dev->hard_start_xmit = ieee80211_mgmt_start_xmit;
 302         dev->change_mtu = ieee80211_change_mtu_apdev;
 303         dev->get_stats = ieee80211_get_stats;
 304         dev->open = ieee80211_mgmt_open;
 305         dev->stop = ieee80211_mgmt_stop;
 306         dev->type = ARPHRD_IEEE80211_PRISM;
 307         dev->hard_header_parse = header_parse_80211;
 308         dev->uninit = ieee80211_if_reinit;
 309         dev->destructor = ieee80211_if_free;
 310 }
 311
 312 /* regular interfaces */
 313
 314 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
 315 {
 316         /* FIX: what would be proper limits for MTU?
 317          * This interface uses 802.3 frames. */
 318         if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6) {
 319                 printk(KERN_WARNING "%s: invalid MTU %d\n",
 320                        dev->name, new_mtu);
 321                 return -EINVAL;
 322         }
 323
 324 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 325         printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
 326 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
 327         dev->mtu = new_mtu;
 328         return 0;
 329 }
 330
 331 static inline int identical_mac_addr_allowed(int type1, int type2)
 332 {
 333         return (type1 == IEEE80211_IF_TYPE_MNTR ||
 334                 type2 == IEEE80211_IF_TYPE_MNTR ||
 335                 (type1 == IEEE80211_IF_TYPE_AP &&
 336                  type2 == IEEE80211_IF_TYPE_WDS) ||
 337                 (type1 == IEEE80211_IF_TYPE_WDS &&
 338                  (type2 == IEEE80211_IF_TYPE_WDS ||
 339                   type2 == IEEE80211_IF_TYPE_AP)) ||
 340                 (type1 == IEEE80211_IF_TYPE_AP &&
 341                  type2 == IEEE80211_IF_TYPE_VLAN) ||
 342                 (type1 == IEEE80211_IF_TYPE_VLAN &&
 343                  (type2 == IEEE80211_IF_TYPE_AP ||
 344                   type2 == IEEE80211_IF_TYPE_VLAN)));
 345 }
 346
 347 /* Check if running monitor interfaces should go to a "soft monitor" mode
 348  * and switch them if necessary. */
 349 static inline void ieee80211_start_soft_monitor(struct ieee80211_local *local)
 350 {
 351         struct ieee80211_if_init_conf conf;
 352
 353         if (local->open_count && local->open_count == local->monitors &&
 354             !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER) &&
 355             local->ops->remove_interface) {
 356                 conf.if_id = -1;
 357                 conf.type = IEEE80211_IF_TYPE_MNTR;
 358                 conf.mac_addr = NULL;
 359                 local->ops->remove_interface(local_to_hw(local), &conf);
 360         }
 361 }
 362
 363 /* Check if running monitor interfaces should go to a "hard monitor" mode
 364  * and switch them if necessary. */
 365 static void ieee80211_start_hard_monitor(struct ieee80211_local *local)
 366 {
 367         struct ieee80211_if_init_conf conf;
 368
 369         if (local->open_count && local->open_count == local->monitors &&
 370             !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
 371                 conf.if_id = -1;
 372                 conf.type = IEEE80211_IF_TYPE_MNTR;
 373                 conf.mac_addr = NULL;
 374                 local->ops->add_interface(local_to_hw(local), &conf);
 375         }
 376 }
 377
 378 static int ieee80211_open(struct net_device *dev)
 379 {
 380         struct ieee80211_sub_if_data *sdata, *nsdata;
 381         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 382         struct ieee80211_if_init_conf conf;
 383         int res;
 384
 385         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 386         read_lock(&local->sub_if_lock);
 387         list_for_each_entry(nsdata, &local->sub_if_list, list) {
 388                 struct net_device *ndev = nsdata->dev;
 389
 390                 if (ndev != dev && ndev != local->mdev && netif_running(ndev) &&
 391                     compare_ether_addr(dev->dev_addr, ndev->dev_addr) == 0 &&
 392                     !identical_mac_addr_allowed(sdata->type, nsdata->type)) {
 393                         read_unlock(&local->sub_if_lock);
 394                         return -ENOTUNIQ;
 395                 }
 396         }
 397         read_unlock(&local->sub_if_lock);
 398
 399         if (sdata->type == IEEE80211_IF_TYPE_WDS &&
 400             is_zero_ether_addr(sdata->u.wds.remote_addr))
 401                 return -ENOLINK;
 402
 403         if (sdata->type == IEEE80211_IF_TYPE_MNTR && local->open_count &&
 404             !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
 405                 /* run the interface in a "soft monitor" mode */
 406                 local->monitors++;
 407                 local->open_count++;
 408                 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
 409                 return 0;
 410         }
 411         ieee80211_start_soft_monitor(local);
 412
 413         conf.if_id = dev->ifindex;
 414         conf.type = sdata->type;
 415         conf.mac_addr = dev->dev_addr;
 416         res = local->ops->add_interface(local_to_hw(local), &conf);
 417         if (res) {
 418                 if (sdata->type == IEEE80211_IF_TYPE_MNTR)
 419                         ieee80211_start_hard_monitor(local);
 420                 return res;
 421         }
 422
 423         if (local->open_count == 0) {
 424                 res = 0;
 425                 tasklet_enable(&local->tx_pending_tasklet);
 426                 tasklet_enable(&local->tasklet);
 427                 if (local->ops->open)
 428                         res = local->ops->open(local_to_hw(local));
 429                 if (res == 0) {
 430                         res = dev_open(local->mdev);
 431                         if (res) {
 432                                 if (local->ops->stop)
 433                                         local->ops->stop(local_to_hw(local));
 434                         } else {
 435                                 res = ieee80211_hw_config(local);
 436                                 if (res && local->ops->stop)
 437                                         local->ops->stop(local_to_hw(local));
 438                                 else if (!res && local->apdev)
 439                                         dev_open(local->apdev);
 440                         }
 441                 }
 442                 if (res) {
 443                         if (local->ops->remove_interface)
 444                                 local->ops->remove_interface(local_to_hw(local),
 445                                                             &conf);
 446                         return res;
 447                 }
 448         }
 449         local->open_count++;
 450
 451         if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
 452                 local->monitors++;
 453                 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
 454         } else
 455                 ieee80211_if_config(dev);
 456
 457         if (sdata->type == IEEE80211_IF_TYPE_STA &&
 458             !local->user_space_mlme)
 459                 netif_carrier_off(dev);
 460         else
 461                 netif_carrier_on(dev);
 462
 463         netif_start_queue(dev);
 464         return 0;
 465 }
 466
 467 static void ieee80211_if_shutdown(struct net_device *dev)
 468 {
 469         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 470         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 471
 472         ASSERT_RTNL();
 473         switch (sdata->type) {
 474         case IEEE80211_IF_TYPE_STA:
 475         case IEEE80211_IF_TYPE_IBSS:
 476                 sdata->u.sta.state = IEEE80211_DISABLED;
 477                 del_timer_sync(&sdata->u.sta.timer);
 478                 skb_queue_purge(&sdata->u.sta.skb_queue);
 479                 if (!local->ops->hw_scan &&
 480                     local->scan_dev == sdata->dev) {
 481                         local->sta_scanning = 0;
 482                         cancel_delayed_work(&local->scan_work);
 483                 }
 484                 flush_workqueue(local->hw.workqueue);
 485                 break;
 486         }
 487 }
 488
 489 static int ieee80211_stop(struct net_device *dev)
 490 {
 491         struct ieee80211_sub_if_data *sdata;
 492         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 493
 494         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 495
 496         if (sdata->type == IEEE80211_IF_TYPE_MNTR &&
 497             local->open_count > 1 &&
 498             !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) {
 499                 /* remove "soft monitor" interface */
 500                 local->open_count--;
 501                 local->monitors--;
 502                 if (!local->monitors)
 503                         local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
 504                 return 0;
 505         }
 506
 507         netif_stop_queue(dev);
 508         ieee80211_if_shutdown(dev);
 509
 510         if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
 511                 local->monitors--;
 512                 if (!local->monitors)
 513                         local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
 514         }
 515
 516         local->open_count--;
 517         if (local->open_count == 0) {
 518                 if (netif_running(local->mdev))
 519                         dev_close(local->mdev);
 520                 if (local->apdev)
 521                         dev_close(local->apdev);
 522                 if (local->ops->stop)
 523                         local->ops->stop(local_to_hw(local));
 524                 tasklet_disable(&local->tx_pending_tasklet);
 525                 tasklet_disable(&local->tasklet);
 526         }
 527         if (local->ops->remove_interface) {
 528                 struct ieee80211_if_init_conf conf;
 529
 530                 conf.if_id = dev->ifindex;
 531                 conf.type = sdata->type;
 532                 conf.mac_addr = dev->dev_addr;
 533                 local->ops->remove_interface(local_to_hw(local), &conf);
 534         }
 535
 536         ieee80211_start_hard_monitor(local);
 537
 538         return 0;
 539 }
 540
 541 enum netif_tx_lock_class {
 542         TX_LOCK_NORMAL,
 543         TX_LOCK_MASTER,
 544 };
 545
 546 static inline void netif_tx_lock_nested(struct net_device *dev, int subclass)
 547 {
 548         spin_lock_nested(&dev->_xmit_lock, subclass);
 549         dev->xmit_lock_owner = smp_processor_id();
 550 }
 551
 552 static void ieee80211_set_multicast_list(struct net_device *dev)
 553 {
 554         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 555         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 556         unsigned short flags;
 557
 558         netif_tx_lock_nested(local->mdev, TX_LOCK_MASTER);
 559         if (((dev->flags & IFF_ALLMULTI) != 0) ^ (sdata->allmulti != 0)) {
 560                 if (sdata->allmulti) {
 561                         sdata->allmulti = 0;
 562                         local->iff_allmultis--;
 563                 } else {
 564                         sdata->allmulti = 1;
 565                         local->iff_allmultis++;
 566                 }
 567         }
 568         if (((dev->flags & IFF_PROMISC) != 0) ^ (sdata->promisc != 0)) {
 569                 if (sdata->promisc) {
 570                         sdata->promisc = 0;
 571                         local->iff_promiscs--;
 572                 } else {
 573                         sdata->promisc = 1;
 574                         local->iff_promiscs++;
 575                 }
 576         }
 577         if (dev->mc_count != sdata->mc_count) {
 578                 local->mc_count = local->mc_count - sdata->mc_count +
 579                                   dev->mc_count;
 580                 sdata->mc_count = dev->mc_count;
 581         }
 582         if (local->ops->set_multicast_list) {
 583                 flags = local->mdev->flags;
 584                 if (local->iff_allmultis)
 585                         flags |= IFF_ALLMULTI;
 586                 if (local->iff_promiscs)
 587                         flags |= IFF_PROMISC;
 588                 read_lock(&local->sub_if_lock);
 589                 local->ops->set_multicast_list(local_to_hw(local), flags,
 590                                               local->mc_count);
 591                 read_unlock(&local->sub_if_lock);
 592         }
 593         netif_tx_unlock(local->mdev);
 594 }
 595
 596 /* Must not be called for mdev and apdev */
 597 void ieee80211_if_setup(struct net_device *dev)
 598 {
 599         ether_setup(dev);
 600         dev->hard_start_xmit = ieee80211_subif_start_xmit;
 601         dev->wireless_handlers = &ieee80211_iw_handler_def;
 602         dev->set_multicast_list = ieee80211_set_multicast_list;
 603         dev->change_mtu = ieee80211_change_mtu;
 604         dev->get_stats = ieee80211_get_stats;
 605         dev->open = ieee80211_open;
 606         dev->stop = ieee80211_stop;
 607         dev->uninit = ieee80211_if_reinit;
 608         dev->destructor = ieee80211_if_free;
 609 }
 610
 611 /* WDS specialties */
 612
 613 int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr)
 614 {
 615         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 616         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 617         struct sta_info *sta;
 618
 619         if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0)
 620                 return 0;
 621
 622         /* Create STA entry for the new peer */
 623         sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL);
 624         if (!sta)
 625                 return -ENOMEM;
 626         sta_info_put(sta);
 627
 628         /* Remove STA entry for the old peer */
 629         sta = sta_info_get(local, sdata->u.wds.remote_addr);
 630         if (sta) {
 631                 sta_info_put(sta);
 632                 sta_info_free(sta, 0);
 633         } else {
 634                 printk(KERN_DEBUG "%s: could not find STA entry for WDS link "
 635                        "peer " MAC_FMT "\n",
 636                        dev->name, MAC_ARG(sdata->u.wds.remote_addr));
 637         }
 638
 639         /* Update WDS link data */
 640         memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN);
 641
 642         return 0;
 643 }
 644
 645 /* everything else */
 646
 647 static int __ieee80211_if_config(struct net_device *dev,
 648                                  struct sk_buff *beacon,
 649                                  struct ieee80211_tx_control *control)
 650 {
 651         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 652         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 653         struct ieee80211_if_conf conf;
 654         static u8 scan_bssid[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 655
 656         if (!local->ops->config_interface || !netif_running(dev))
 657                 return 0;
 658
 659         memset(&conf, 0, sizeof(conf));
 660         conf.type = sdata->type;
 661         if (sdata->type == IEEE80211_IF_TYPE_STA ||
 662             sdata->type == IEEE80211_IF_TYPE_IBSS) {
 663                 if (local->sta_scanning &&
 664                     local->scan_dev == dev)
 665                         conf.bssid = scan_bssid;
 666                 else
 667                         conf.bssid = sdata->u.sta.bssid;
 668                 conf.ssid = sdata->u.sta.ssid;
 669                 conf.ssid_len = sdata->u.sta.ssid_len;
 670                 conf.generic_elem = sdata->u.sta.extra_ie;
 671                 conf.generic_elem_len = sdata->u.sta.extra_ie_len;
 672         } else if (sdata->type == IEEE80211_IF_TYPE_AP) {
 673                 conf.ssid = sdata->u.ap.ssid;
 674                 conf.ssid_len = sdata->u.ap.ssid_len;
 675                 conf.generic_elem = sdata->u.ap.generic_elem;
 676                 conf.generic_elem_len = sdata->u.ap.generic_elem_len;
 677                 conf.beacon = beacon;
 678                 conf.beacon_control = control;
 679         }
 680         return local->ops->config_interface(local_to_hw(local),
 681                                            dev->ifindex, &conf);
 682 }
 683
 684 int ieee80211_if_config(struct net_device *dev)
 685 {
 686         return __ieee80211_if_config(dev, NULL, NULL);
 687 }
 688
 689 int ieee80211_if_config_beacon(struct net_device *dev)
 690 {
 691         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 692         struct ieee80211_tx_control control;
 693         struct sk_buff *skb;
 694
 695         if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
 696                 return 0;
 697         skb = ieee80211_beacon_get(local_to_hw(local), dev->ifindex, &control);
 698         if (!skb)
 699                 return -ENOMEM;
 700         return __ieee80211_if_config(dev, skb, &control);
 701 }
 702
 703 int ieee80211_hw_config(struct ieee80211_local *local)
 704 {
 705         struct ieee80211_hw_mode *mode;
 706         struct ieee80211_channel *chan;
 707         int ret = 0;
 708
 709         if (local->sta_scanning) {
 710                 chan = local->scan_channel;
 711                 mode = local->scan_hw_mode;
 712         } else {
 713                 chan = local->oper_channel;
 714                 mode = local->oper_hw_mode;
 715         }
 716
 717         local->hw.conf.channel = chan->chan;
 718         local->hw.conf.channel_val = chan->val;
 719         local->hw.conf.power_level = chan->power_level;
 720         local->hw.conf.freq = chan->freq;
 721         local->hw.conf.phymode = mode->mode;
 722         local->hw.conf.antenna_max = chan->antenna_max;
 723         local->hw.conf.chan = chan;
 724         local->hw.conf.mode = mode;
 725
 726 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
 727         printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d "
 728                "phymode=%d\n", local->hw.conf.channel, local->hw.conf.freq,
 729                local->hw.conf.phymode);
 730 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
 731
 732         if (local->ops->config)
 733                 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
 734
 735         return ret;
 736 }
 737
 738 struct dev_mc_list *ieee80211_get_mc_list_item(struct ieee80211_hw *hw,
 739                                                struct dev_mc_list *prev,
 740                                                void **ptr)
 741 {
 742         struct ieee80211_local *local = hw_to_local(hw);
 743         struct ieee80211_sub_if_data *sdata = *ptr;
 744         struct dev_mc_list *mc;
 745
 746         if (!prev) {
 747                 WARN_ON(sdata);
 748                 sdata = NULL;
 749         }
 750         if (!prev || !prev->next) {
 751                 if (sdata)
 752                         sdata = list_entry(sdata->list.next,
 753                                            struct ieee80211_sub_if_data, list);
 754                 else
 755                         sdata = list_entry(local->sub_if_list.next,
 756                                            struct ieee80211_sub_if_data, list);
 757                 if (&sdata->list != &local->sub_if_list)
 758                         mc = sdata->dev->mc_list;
 759                 else
 760                         mc = NULL;
 761         } else
 762                 mc = prev->next;
 763
 764         *ptr = sdata;
 765         return mc;
 766 }
 767 EXPORT_SYMBOL(ieee80211_get_mc_list_item);
 768
 769 static void ieee80211_stat_refresh(unsigned long data)
 770 {
 771         struct ieee80211_local *local = (struct ieee80211_local *) data;
 772         struct sta_info *sta;
 773         struct ieee80211_sub_if_data *sdata;
 774
 775         if (!local->stat_time)
 776                 return;
 777
 778         /* go through all stations */
 779         spin_lock_bh(&local->sta_lock);
 780         list_for_each_entry(sta, &local->sta_list, list) {
 781                 sta->channel_use = (sta->channel_use_raw / local->stat_time) /
 782                         CHAN_UTIL_PER_10MS;
 783                 sta->channel_use_raw = 0;
 784         }
 785         spin_unlock_bh(&local->sta_lock);
 786
 787         /* go through all subinterfaces */
 788         read_lock(&local->sub_if_lock);
 789         list_for_each_entry(sdata, &local->sub_if_list, list) {
 790                 sdata->channel_use = (sdata->channel_use_raw /
 791                                       local->stat_time) / CHAN_UTIL_PER_10MS;
 792                 sdata->channel_use_raw = 0;
 793         }
 794         read_unlock(&local->sub_if_lock);
 795
 796         /* hardware interface */
 797         local->channel_use = (local->channel_use_raw /
 798                               local->stat_time) / CHAN_UTIL_PER_10MS;
 799         local->channel_use_raw = 0;
 800
 801         local->stat_timer.expires = jiffies + HZ * local->stat_time / 100;
 802         add_timer(&local->stat_timer);
 803 }
 804
 805 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
 806                                  struct sk_buff *skb,
 807                                  struct ieee80211_tx_status *status)
 808 {
 809         struct ieee80211_local *local = hw_to_local(hw);
 810         struct ieee80211_tx_status *saved;
 811         int tmp;
 812
 813         skb->dev = local->mdev;
 814         saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC);
 815         if (unlikely(!saved)) {
 816                 if (net_ratelimit())
 817                         printk(KERN_WARNING "%s: Not enough memory, "
 818                                "dropping tx status", skb->dev->name);
 819                 /* should be dev_kfree_skb_irq, but due to this function being
 820                  * named _irqsafe instead of just _irq we can't be sure that
 821                  * people won't call it from non-irq contexts */
 822                 dev_kfree_skb_any(skb);
 823                 return;
 824         }
 825         memcpy(saved, status, sizeof(struct ieee80211_tx_status));
 826         /* copy pointer to saved status into skb->cb for use by tasklet */
 827         memcpy(skb->cb, &saved, sizeof(saved));
 828
 829         skb->pkt_type = IEEE80211_TX_STATUS_MSG;
 830         skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ?
 831                        &local->skb_queue : &local->skb_queue_unreliable, skb);
 832         tmp = skb_queue_len(&local->skb_queue) +
 833                 skb_queue_len(&local->skb_queue_unreliable);
 834         while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
 835                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 836                 memcpy(&saved, skb->cb, sizeof(saved));
 837                 kfree(saved);
 838                 dev_kfree_skb_irq(skb);
 839                 tmp--;
 840                 I802_DEBUG_INC(local->tx_status_drop);
 841         }
 842         tasklet_schedule(&local->tasklet);
 843 }
 844 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
 845
 846 static void ieee80211_tasklet_handler(unsigned long data)
 847 {
 848         struct ieee80211_local *local = (struct ieee80211_local *) data;
 849         struct sk_buff *skb;
 850         struct ieee80211_rx_status rx_status;
 851         struct ieee80211_tx_status *tx_status;
 852
 853         while ((skb = skb_dequeue(&local->skb_queue)) ||
 854                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
 855                 switch (skb->pkt_type) {
 856                 case IEEE80211_RX_MSG:
 857                         /* status is in skb->cb */
 858                         memcpy(&rx_status, skb->cb, sizeof(rx_status));
 859                         /* Clear skb->type in order to not confuse kernel
 860                          * netstack. */
 861                         skb->pkt_type = 0;
 862                         __ieee80211_rx(local_to_hw(local), skb, &rx_status);
 863                         break;
 864                 case IEEE80211_TX_STATUS_MSG:
 865                         /* get pointer to saved status out of skb->cb */
 866                         memcpy(&tx_status, skb->cb, sizeof(tx_status));
 867                         skb->pkt_type = 0;
 868                         ieee80211_tx_status(local_to_hw(local),
 869                                             skb, tx_status);
 870                         kfree(tx_status);
 871                         break;
 872                 default: /* should never get here! */
 873                         printk(KERN_ERR "%s: Unknown message type (%d)\n",
 874                                local->mdev->name, skb->pkt_type);
 875                         dev_kfree_skb(skb);
 876                         break;
 877                 }
 878         }
 879 }
 880
 881 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
 882  * make a prepared TX frame (one that has been given to hw) to look like brand
 883  * new IEEE 802.11 frame that is ready to go through TX processing again.
 884  * Also, tx_packet_data in cb is restored from tx_control. */
 885 static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
 886                                       struct ieee80211_key *key,
 887                                       struct sk_buff *skb,
 888                                       struct ieee80211_tx_control *control)
 889 {
 890         int hdrlen, iv_len, mic_len;
 891         struct ieee80211_tx_packet_data *pkt_data;
 892
 893         pkt_data = (struct ieee80211_tx_packet_data *)skb->cb;
 894         pkt_data->ifindex = control->ifindex;
 895         pkt_data->mgmt_iface = (control->type == IEEE80211_IF_TYPE_MGMT);
 896         pkt_data->req_tx_status = !!(control->flags & IEEE80211_TXCTL_REQ_TX_STATUS);
 897         pkt_data->do_not_encrypt = !!(control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT);
 898         pkt_data->requeue = !!(control->flags & IEEE80211_TXCTL_REQUEUE);
 899         pkt_data->queue = control->queue;
 900
 901         hdrlen = ieee80211_get_hdrlen_from_skb(skb);
 902
 903         if (!key)
 904                 goto no_key;
 905
 906         switch (key->alg) {
 907         case ALG_WEP:
 908                 iv_len = WEP_IV_LEN;
 909                 mic_len = WEP_ICV_LEN;
 910                 break;
 911         case ALG_TKIP:
 912                 iv_len = TKIP_IV_LEN;
 913                 mic_len = TKIP_ICV_LEN;
 914                 break;
 915         case ALG_CCMP:
 916                 iv_len = CCMP_HDR_LEN;
 917                 mic_len = CCMP_MIC_LEN;
 918                 break;
 919         default:
 920                 goto no_key;
 921         }
 922
 923         if (skb->len >= mic_len && key->force_sw_encrypt)
 924                 skb_trim(skb, skb->len - mic_len);
 925         if (skb->len >= iv_len && skb->len > hdrlen) {
 926                 memmove(skb->data + iv_len, skb->data, hdrlen);
 927                 skb_pull(skb, iv_len);
 928         }
 929
 930 no_key:
 931         {
 932                 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 933                 u16 fc = le16_to_cpu(hdr->frame_control);
 934                 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
 935                         fc &= ~IEEE80211_STYPE_QOS_DATA;
 936                         hdr->frame_control = cpu_to_le16(fc);
 937                         memmove(skb->data + 2, skb->data, hdrlen - 2);
 938                         skb_pull(skb, 2);
 939                 }
 940         }
 941 }
 942
 943 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
 944                          struct ieee80211_tx_status *status)
 945 {
 946         struct sk_buff *skb2;
 947         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 948         struct ieee80211_local *local = hw_to_local(hw);
 949         u16 frag, type;
 950         u32 msg_type;
 951         struct ieee80211_tx_status_rtap_hdr *rthdr;
 952         struct ieee80211_sub_if_data *sdata;
 953         int monitors;
 954
 955         if (!status) {
 956                 printk(KERN_ERR
 957                        "%s: ieee80211_tx_status called with NULL status\n",
 958                        local->mdev->name);
 959                 dev_kfree_skb(skb);
 960                 return;
 961         }
 962
 963         if (status->excessive_retries) {
 964                 struct sta_info *sta;
 965                 sta = sta_info_get(local, hdr->addr1);
 966                 if (sta) {
 967                         if (sta->flags & WLAN_STA_PS) {
 968                                 /* The STA is in power save mode, so assume
 969                                  * that this TX packet failed because of that.
 970                                  */
 971                                 status->excessive_retries = 0;
 972                                 status->flags |= IEEE80211_TX_STATUS_TX_FILTERED;
 973                         }
 974                         sta_info_put(sta);
 975                 }
 976         }
 977
 978         if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) {
 979                 struct sta_info *sta;
 980                 sta = sta_info_get(local, hdr->addr1);
 981                 if (sta) {
 982                         sta->tx_filtered_count++;
 983
 984                         /* Clear the TX filter mask for this STA when sending
 985                          * the next packet. If the STA went to power save mode,
 986                          * this will happen when it is waking up for the next
 987                          * time. */
 988                         sta->clear_dst_mask = 1;
 989
 990                         /* TODO: Is the WLAN_STA_PS flag always set here or is
 991                          * the race between RX and TX status causing some
 992                          * packets to be filtered out before 80211.o gets an
 993                          * update for PS status? This seems to be the case, so
 994                          * no changes are likely to be needed. */
 995                         if (sta->flags & WLAN_STA_PS &&
 996                             skb_queue_len(&sta->tx_filtered) <
 997                             STA_MAX_TX_BUFFER) {
 998                                 ieee80211_remove_tx_extra(local, sta->key,
 999                                                           skb,
1000                                                           &status->control);
1001                                 skb_queue_tail(&sta->tx_filtered, skb);
1002                         } else if (!(sta->flags & WLAN_STA_PS) &&
1003                                    !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) {
1004                                 /* Software retry the packet once */
1005                                 status->control.flags |= IEEE80211_TXCTL_REQUEUE;
1006                                 ieee80211_remove_tx_extra(local, sta->key,
1007                                                           skb,
1008                                                           &status->control);
1009                                 dev_queue_xmit(skb);
1010                         } else {
1011                                 if (net_ratelimit()) {
1012                                         printk(KERN_DEBUG "%s: dropped TX "
1013                                                "filtered frame queue_len=%d "
1014                                                "PS=%d @%lu\n",
1015                                                local->mdev->name,
1016                                                skb_queue_len(
1017                                                        &sta->tx_filtered),
1018                                                !!(sta->flags & WLAN_STA_PS),
1019                                                jiffies);
1020                                 }
1021                                 dev_kfree_skb(skb);
1022                         }
1023                         sta_info_put(sta);
1024                         return;
1025                 }
1026         } else {
1027                 /* FIXME: STUPID to call this with both local and local->mdev */
1028                 rate_control_tx_status(local, local->mdev, skb, status);
1029         }
1030
1031         ieee80211_led_tx(local, 0);
1032
1033         /* SNMP counters
1034          * Fragments are passed to low-level drivers as separate skbs, so these
1035          * are actually fragments, not frames. Update frame counters only for
1036          * the first fragment of the frame. */
1037
1038         frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
1039         type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
1040
1041         if (status->flags & IEEE80211_TX_STATUS_ACK) {
1042                 if (frag == 0) {
1043                         local->dot11TransmittedFrameCount++;
1044                         if (is_multicast_ether_addr(hdr->addr1))
1045                                 local->dot11MulticastTransmittedFrameCount++;
1046                         if (status->retry_count > 0)
1047                                 local->dot11RetryCount++;
1048                         if (status->retry_count > 1)
1049                                 local->dot11MultipleRetryCount++;
1050                 }
1051
1052                 /* This counter shall be incremented for an acknowledged MPDU
1053                  * with an individual address in the address 1 field or an MPDU
1054                  * with a multicast address in the address 1 field of type Data
1055                  * or Management. */
1056                 if (!is_multicast_ether_addr(hdr->addr1) ||
1057                     type == IEEE80211_FTYPE_DATA ||
1058                     type == IEEE80211_FTYPE_MGMT)
1059                         local->dot11TransmittedFragmentCount++;
1060         } else {
1061                 if (frag == 0)
1062                         local->dot11FailedCount++;
1063         }
1064
1065         msg_type = (status->flags & IEEE80211_TX_STATUS_ACK) ?
1066                 ieee80211_msg_tx_callback_ack : ieee80211_msg_tx_callback_fail;
1067
1068         /* this was a transmitted frame, but now we want to reuse it */
1069         skb_orphan(skb);
1070
1071         if ((status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS) &&
1072             local->apdev) {
1073                 if (local->monitors) {
1074                         skb2 = skb_clone(skb, GFP_ATOMIC);
1075                 } else {
1076                         skb2 = skb;
1077                         skb = NULL;
1078                 }
1079
1080                 if (skb2)
1081                         /* Send frame to hostapd */
1082                         ieee80211_rx_mgmt(local, skb2, NULL, msg_type);
1083
1084                 if (!skb)
1085                         return;
1086         }
1087
1088         if (!local->monitors) {
1089                 dev_kfree_skb(skb);
1090                 return;
1091         }
1092
1093         /* send frame to monitor interfaces now */
1094
1095         if (skb_headroom(skb) < sizeof(*rthdr)) {
1096                 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
1097                 dev_kfree_skb(skb);
1098                 return;
1099         }
1100
1101         rthdr = (struct ieee80211_tx_status_rtap_hdr*)
1102                                 skb_push(skb, sizeof(*rthdr));
1103
1104         memset(rthdr, 0, sizeof(*rthdr));
1105         rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
1106         rthdr->hdr.it_present =
1107                 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
1108                             (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
1109
1110         if (!(status->flags & IEEE80211_TX_STATUS_ACK) &&
1111             !is_multicast_ether_addr(hdr->addr1))
1112                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
1113
1114         if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) &&
1115             (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT))
1116                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
1117         else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS)
1118                 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
1119
1120         rthdr->data_retries = status->retry_count;
1121
1122         read_lock(&local->sub_if_lock);
1123         monitors = local->monitors;
1124         list_for_each_entry(sdata, &local->sub_if_list, list) {
1125                 /*
1126                  * Using the monitors counter is possibly racy, but
1127                  * if the value is wrong we simply either clone the skb
1128                  * once too much or forget sending it to one monitor iface
1129                  * The latter case isn't nice but fixing the race is much
1130                  * more complicated.
1131                  */
1132                 if (!monitors || !skb)
1133                         goto out;
1134
1135                 if (sdata->type == IEEE80211_IF_TYPE_MNTR) {
1136                         if (!netif_running(sdata->dev))
1137                                 continue;
1138                         monitors--;
1139                         if (monitors)
1140                                 skb2 = skb_clone(skb, GFP_KERNEL);
1141                         else
1142                                 skb2 = NULL;
1143                         skb->dev = sdata->dev;
1144                         /* XXX: is this sufficient for BPF? */
1145                         skb_set_mac_header(skb, 0);
1146                         skb->ip_summed = CHECKSUM_UNNECESSARY;
1147                         skb->pkt_type = PACKET_OTHERHOST;
1148                         skb->protocol = htons(ETH_P_802_2);
1149                         memset(skb->cb, 0, sizeof(skb->cb));
1150                         netif_rx(skb);
1151                         skb = skb2;
1152                 }
1153         }
1154  out:
1155         read_unlock(&local->sub_if_lock);
1156         if (skb)
1157                 dev_kfree_skb(skb);
1158 }
1159 EXPORT_SYMBOL(ieee80211_tx_status);
1160
1161 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
1162                                         const struct ieee80211_ops *ops)
1163 {
1164         struct net_device *mdev;
1165         struct ieee80211_local *local;
1166         struct ieee80211_sub_if_data *sdata;
1167         int priv_size;
1168         struct wiphy *wiphy;
1169
1170         /* Ensure 32-byte alignment of our private data and hw private data.
1171          * We use the wiphy priv data for both our ieee80211_local and for
1172          * the driver's private data
1173          *
1174          * In memory it'll be like this:
1175          *
1176          * +-------------------------+
1177          * | struct wiphy           |
1178          * +-------------------------+
1179          * | struct ieee80211_local  |
1180          * +-------------------------+
1181          * | driver's private data   |
1182          * +-------------------------+
1183          *
1184          */
1185         priv_size = ((sizeof(struct ieee80211_local) +
1186                       NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1187                     priv_data_len;
1188
1189         wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1190
1191         if (!wiphy)
1192                 return NULL;
1193
1194         wiphy->privid = mac80211_wiphy_privid;
1195
1196         local = wiphy_priv(wiphy);
1197         local->hw.wiphy = wiphy;
1198
1199         local->hw.priv = (char *)local +
1200                          ((sizeof(struct ieee80211_local) +
1201                            NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1202
1203         BUG_ON(!ops->tx);
1204         BUG_ON(!ops->config);
1205         BUG_ON(!ops->add_interface);
1206         local->ops = ops;
1207
1208         /* for now, mdev needs sub_if_data :/ */
1209         mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data),
1210                             "wmaster%d", ether_setup);
1211         if (!mdev) {
1212                 wiphy_free(wiphy);
1213                 return NULL;
1214         }
1215
1216         sdata = IEEE80211_DEV_TO_SUB_IF(mdev);
1217         mdev->ieee80211_ptr = &sdata->wdev;
1218         sdata->wdev.wiphy = wiphy;
1219
1220         local->hw.queues = 1; /* default */
1221
1222         local->mdev = mdev;
1223         local->rx_pre_handlers = ieee80211_rx_pre_handlers;
1224         local->rx_handlers = ieee80211_rx_handlers;
1225         local->tx_handlers = ieee80211_tx_handlers;
1226
1227         local->bridge_packets = 1;
1228
1229         local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1230         local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1231         local->short_retry_limit = 7;
1232         local->long_retry_limit = 4;
1233         local->hw.conf.radio_enabled = 1;
1234
1235         local->enabled_modes = (unsigned int) -1;
1236
1237         INIT_LIST_HEAD(&local->modes_list);
1238
1239         rwlock_init(&local->sub_if_lock);
1240         INIT_LIST_HEAD(&local->sub_if_list);
1241
1242         INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
1243         init_timer(&local->stat_timer);
1244         local->stat_timer.function = ieee80211_stat_refresh;
1245         local->stat_timer.data = (unsigned long) local;
1246         ieee80211_rx_bss_list_init(mdev);
1247
1248         sta_info_init(local);
1249
1250         mdev->hard_start_xmit = ieee80211_master_start_xmit;
1251         mdev->open = ieee80211_master_open;
1252         mdev->stop = ieee80211_master_stop;
1253         mdev->type = ARPHRD_IEEE80211;
1254         mdev->hard_header_parse = header_parse_80211;
1255
1256         sdata->type = IEEE80211_IF_TYPE_AP;
1257         sdata->dev = mdev;
1258         sdata->local = local;
1259         sdata->u.ap.force_unicast_rateidx = -1;
1260         sdata->u.ap.max_ratectrl_rateidx = -1;
1261         ieee80211_if_sdata_init(sdata);
1262         list_add_tail(&sdata->list, &local->sub_if_list);
1263
1264         tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1265                      (unsigned long)local);
1266         tasklet_disable(&local->tx_pending_tasklet);
1267
1268         tasklet_init(&local->tasklet,
1269                      ieee80211_tasklet_handler,
1270                      (unsigned long) local);
1271         tasklet_disable(&local->tasklet);
1272
1273         skb_queue_head_init(&local->skb_queue);
1274         skb_queue_head_init(&local->skb_queue_unreliable);
1275
1276         return local_to_hw(local);
1277 }
1278 EXPORT_SYMBOL(ieee80211_alloc_hw);
1279
1280 int ieee80211_register_hw(struct ieee80211_hw *hw)
1281 {
1282         struct ieee80211_local *local = hw_to_local(hw);
1283         const char *name;
1284         int result;
1285
1286         result = wiphy_register(local->hw.wiphy);
1287         if (result < 0)
1288                 return result;
1289
1290         name = wiphy_dev(local->hw.wiphy)->driver->name;
1291         local->hw.workqueue = create_singlethread_workqueue(name);
1292         if (!local->hw.workqueue) {
1293                 result = -ENOMEM;
1294                 goto fail_workqueue;
1295         }
1296
1297         /*
1298          * The hardware needs headroom for sending the frame,
1299          * and we need some headroom for passing the frame to monitor
1300          * interfaces, but never both at the same time.
1301          */
1302         local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1303                                    sizeof(struct ieee80211_tx_status_rtap_hdr));
1304
1305         debugfs_hw_add(local);
1306
1307         local->hw.conf.beacon_int = 1000;
1308
1309         local->wstats_flags |= local->hw.max_rssi ?
1310                                IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID;
1311         local->wstats_flags |= local->hw.max_signal ?
1312                                IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1313         local->wstats_flags |= local->hw.max_noise ?
1314                                IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1315         if (local->hw.max_rssi < 0 || local->hw.max_noise < 0)
1316                 local->wstats_flags |= IW_QUAL_DBM;
1317
1318         result = sta_info_start(local);
1319         if (result < 0)
1320                 goto fail_sta_info;
1321
1322         rtnl_lock();
1323         result = dev_alloc_name(local->mdev, local->mdev->name);
1324         if (result < 0)
1325                 goto fail_dev;
1326
1327         memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1328         SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1329
1330         result = register_netdevice(local->mdev);
1331         if (result < 0)
1332                 goto fail_dev;
1333
1334         ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1335
1336         result = ieee80211_init_rate_ctrl_alg(local, NULL);
1337         if (result < 0) {
1338                 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1339                        "algorithm\n", local->mdev->name);
1340                 goto fail_rate;
1341         }
1342
1343         result = ieee80211_wep_init(local);
1344
1345         if (result < 0) {
1346                 printk(KERN_DEBUG "%s: Failed to initialize wep\n",
1347                        local->mdev->name);
1348                 goto fail_wep;
1349         }
1350
1351         ieee80211_install_qdisc(local->mdev);
1352
1353         /* add one default STA interface */
1354         result = ieee80211_if_add(local->mdev, "wlan%d", NULL,
1355                                   IEEE80211_IF_TYPE_STA);
1356         if (result)
1357                 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1358                        local->mdev->name);
1359
1360         local->reg_state = IEEE80211_DEV_REGISTERED;
1361         rtnl_unlock();
1362
1363         ieee80211_led_init(local);
1364
1365         return 0;
1366
1367 fail_wep:
1368         rate_control_deinitialize(local);
1369 fail_rate:
1370         ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev));
1371         unregister_netdevice(local->mdev);
1372 fail_dev:
1373         rtnl_unlock();
1374         sta_info_stop(local);
1375 fail_sta_info:
1376         debugfs_hw_del(local);
1377         destroy_workqueue(local->hw.workqueue);
1378 fail_workqueue:
1379         wiphy_unregister(local->hw.wiphy);
1380         return result;
1381 }
1382 EXPORT_SYMBOL(ieee80211_register_hw);
1383
1384 int ieee80211_register_hwmode(struct ieee80211_hw *hw,
1385                               struct ieee80211_hw_mode *mode)
1386 {
1387         struct ieee80211_local *local = hw_to_local(hw);
1388         struct ieee80211_rate *rate;
1389         int i;
1390
1391         INIT_LIST_HEAD(&mode->list);
1392         list_add_tail(&mode->list, &local->modes_list);
1393
1394         local->hw_modes |= (1 << mode->mode);
1395         for (i = 0; i < mode->num_rates; i++) {
1396                 rate = &(mode->rates[i]);
1397                 rate->rate_inv = CHAN_UTIL_RATE_LCM / rate->rate;
1398         }
1399         ieee80211_prepare_rates(local, mode);
1400
1401         if (!local->oper_hw_mode) {
1402                 /* Default to this mode */
1403                 local->hw.conf.phymode = mode->mode;
1404                 local->oper_hw_mode = local->scan_hw_mode = mode;
1405                 local->oper_channel = local->scan_channel = &mode->channels[0];
1406                 local->hw.conf.mode = local->oper_hw_mode;
1407                 local->hw.conf.chan = local->oper_channel;
1408         }
1409
1410         if (!(hw->flags & IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED))
1411                 ieee80211_set_default_regdomain(mode);
1412
1413         return 0;
1414 }
1415 EXPORT_SYMBOL(ieee80211_register_hwmode);
1416
1417 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1418 {
1419         struct ieee80211_local *local = hw_to_local(hw);
1420         struct ieee80211_sub_if_data *sdata, *tmp;
1421         struct list_head tmp_list;
1422         int i;
1423
1424         tasklet_kill(&local->tx_pending_tasklet);
1425         tasklet_kill(&local->tasklet);
1426
1427         rtnl_lock();
1428
1429         BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
1430
1431         local->reg_state = IEEE80211_DEV_UNREGISTERED;
1432         if (local->apdev)
1433                 ieee80211_if_del_mgmt(local);
1434
1435         write_lock_bh(&local->sub_if_lock);
1436         list_replace_init(&local->sub_if_list, &tmp_list);
1437         write_unlock_bh(&local->sub_if_lock);
1438
1439         list_for_each_entry_safe(sdata, tmp, &tmp_list, list)
1440                 __ieee80211_if_del(local, sdata);
1441
1442         rtnl_unlock();
1443
1444         if (local->stat_time)
1445                 del_timer_sync(&local->stat_timer);
1446
1447         ieee80211_rx_bss_list_deinit(local->mdev);
1448         ieee80211_clear_tx_pending(local);
1449         sta_info_stop(local);
1450         rate_control_deinitialize(local);
1451         debugfs_hw_del(local);
1452
1453         for (i = 0; i < NUM_IEEE80211_MODES; i++) {
1454                 kfree(local->supp_rates[i]);
1455                 kfree(local->basic_rates[i]);
1456         }
1457
1458         if (skb_queue_len(&local->skb_queue)
1459                         || skb_queue_len(&local->skb_queue_unreliable))
1460                 printk(KERN_WARNING "%s: skb_queue not empty\n",
1461                        local->mdev->name);
1462         skb_queue_purge(&local->skb_queue);
1463         skb_queue_purge(&local->skb_queue_unreliable);
1464
1465         destroy_workqueue(local->hw.workqueue);
1466         wiphy_unregister(local->hw.wiphy);
1467         ieee80211_wep_free(local);
1468         ieee80211_led_exit(local);
1469 }
1470 EXPORT_SYMBOL(ieee80211_unregister_hw);
1471
1472 void ieee80211_free_hw(struct ieee80211_hw *hw)
1473 {
1474         struct ieee80211_local *local = hw_to_local(hw);
1475
1476         ieee80211_if_free(local->mdev);
1477         wiphy_free(local->hw.wiphy);
1478 }
1479 EXPORT_SYMBOL(ieee80211_free_hw);
1480
1481 struct net_device_stats *ieee80211_dev_stats(struct net_device *dev)
1482 {
1483         struct ieee80211_sub_if_data *sdata;
1484         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1485         return &sdata->stats;
1486 }
1487
1488 static int __init ieee80211_init(void)
1489 {
1490         struct sk_buff *skb;
1491         int ret;
1492
1493         BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb));
1494
1495         ret = ieee80211_wme_register();
1496         if (ret) {
1497                 printk(KERN_DEBUG "ieee80211_init: failed to "
1498                        "initialize WME (err=%d)\n", ret);
1499                 return ret;
1500         }
1501
1502         ieee80211_debugfs_netdev_init();
1503         ieee80211_regdomain_init();
1504
1505         return 0;
1506 }
1507
1508 static void __exit ieee80211_exit(void)
1509 {
1510         ieee80211_wme_unregister();
1511         ieee80211_debugfs_netdev_exit();
1512 }
1513
1514
1515 subsys_initcall(ieee80211_init);
1516 module_exit(ieee80211_exit);
1517
1518 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1519 MODULE_LICENSE("GPL");