drivers/net/wireless/mac80211_hwsim.c

   1 /*
   2  * mac80211_hwsim - software simulator of 802.11 radio(s) for mac80211
   3  * Copyright (c) 2008, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  */
   9
  10 /*
  11  * TODO:
  12  * - IBSS mode simulation (Beacon transmission with competition for "air time")
  13  * - RX filtering based on filter configuration (data->rx_filter)
  14  */
  15
  16 #include <linux/list.h>
  17 #include <linux/spinlock.h>
  18 #include <net/mac80211.h>
  19 #include <net/ieee80211_radiotap.h>
  20 #include <linux/if_arp.h>
  21 #include <linux/rtnetlink.h>
  22 #include <linux/etherdevice.h>
  23 #include <linux/debugfs.h>
  24
  25 MODULE_AUTHOR("Jouni Malinen");
  26 MODULE_DESCRIPTION("Software simulator of 802.11 radio(s) for mac80211");
  27 MODULE_LICENSE("GPL");
  28
  29 static int radios = 2;
  30 module_param(radios, int, 0444);
  31 MODULE_PARM_DESC(radios, "Number of simulated radios");
  32
  33 /**
  34  * enum hwsim_regtest - the type of regulatory tests we offer
  35  *
  36  * These are the different values you can use for the regtest
  37  * module parameter. This is useful to help test world roaming
  38  * and the driver regulatory_hint() call and combinations of these.
  39  * If you want to do specific alpha2 regulatory domain tests simply
  40  * use the userspace regulatory request as that will be respected as
  41  * well without the need of this module parameter. This is designed
  42  * only for testing the driver regulatory request, world roaming
  43  * and all possible combinations.
  44  *
  45  * @HWSIM_REGTEST_DISABLED: No regulatory tests are performed,
  46  *      this is the default value.
  47  * @HWSIM_REGTEST_DRIVER_REG_FOLLOW: Used for testing the driver regulatory
  48  *      hint, only one driver regulatory hint will be sent as such the
  49  *      secondary radios are expected to follow.
  50  * @HWSIM_REGTEST_DRIVER_REG_ALL: Used for testing the driver regulatory
  51  *      request with all radios reporting the same regulatory domain.
  52  * @HWSIM_REGTEST_DIFF_COUNTRY: Used for testing the drivers calling
  53  *      different regulatory domains requests. Expected behaviour is for
  54  *      an intersection to occur but each device will still use their
  55  *      respective regulatory requested domains. Subsequent radios will
  56  *      use the resulting intersection.
  57  * @HWSIM_REGTEST_WORLD_ROAM: Used for testing the world roaming. We acomplish
  58  *      this by using a custom beacon-capable regulatory domain for the first
  59  *      radio. All other device world roam.
  60  * @HWSIM_REGTEST_CUSTOM_WORLD: Used for testing the custom world regulatory
  61  *      domain requests. All radios will adhere to this custom world regulatory
  62  *      domain.
  63  * @HWSIM_REGTEST_CUSTOM_WORLD_2: Used for testing 2 custom world regulatory
  64  *      domain requests. The first radio will adhere to the first custom world
  65  *      regulatory domain, the second one to the second custom world regulatory
  66  *      domain. All other devices will world roam.
  67  * @HWSIM_REGTEST_STRICT_FOLLOW_: Used for testing strict regulatory domain
  68  *      settings, only the first radio will send a regulatory domain request
  69  *      and use strict settings. The rest of the radios are expected to follow.
  70  * @HWSIM_REGTEST_STRICT_ALL: Used for testing strict regulatory domain
  71  *      settings. All radios will adhere to this.
  72  * @HWSIM_REGTEST_STRICT_AND_DRIVER_REG: Used for testing strict regulatory
  73  *      domain settings, combined with secondary driver regulatory domain
  74  *      settings. The first radio will get a strict regulatory domain setting
  75  *      using the first driver regulatory request and the second radio will use
  76  *      non-strict settings using the second driver regulatory request. All
  77  *      other devices should follow the intersection created between the
  78  *      first two.
  79  * @HWSIM_REGTEST_ALL: Used for testing every possible mix. You will need
  80  *      at least 6 radios for a complete test. We will test in this order:
  81  *      1 - driver custom world regulatory domain
  82  *      2 - second custom world regulatory domain
  83  *      3 - first driver regulatory domain request
  84  *      4 - second driver regulatory domain request
  85  *      5 - strict regulatory domain settings using the third driver regulatory
  86  *          domain request
  87  *      6 and on - should follow the intersection of the 3rd, 4rth and 5th radio
  88  *                 regulatory requests.
  89  */
  90 enum hwsim_regtest {
  91         HWSIM_REGTEST_DISABLED = 0,
  92         HWSIM_REGTEST_DRIVER_REG_FOLLOW = 1,
  93         HWSIM_REGTEST_DRIVER_REG_ALL = 2,
  94         HWSIM_REGTEST_DIFF_COUNTRY = 3,
  95         HWSIM_REGTEST_WORLD_ROAM = 4,
  96         HWSIM_REGTEST_CUSTOM_WORLD = 5,
  97         HWSIM_REGTEST_CUSTOM_WORLD_2 = 6,
  98         HWSIM_REGTEST_STRICT_FOLLOW = 7,
  99         HWSIM_REGTEST_STRICT_ALL = 8,
 100         HWSIM_REGTEST_STRICT_AND_DRIVER_REG = 9,
 101         HWSIM_REGTEST_ALL = 10,
 102 };
 103
 104 /* Set to one of the HWSIM_REGTEST_* values above */
 105 static int regtest = HWSIM_REGTEST_DISABLED;
 106 module_param(regtest, int, 0444);
 107 MODULE_PARM_DESC(regtest, "The type of regulatory test we want to run");
 108
 109 static const char *hwsim_alpha2s[] = {
 110         "FI",
 111         "AL",
 112         "US",
 113         "DE",
 114         "JP",
 115         "AL",
 116 };
 117
 118 static const struct ieee80211_regdomain hwsim_world_regdom_custom_01 = {
 119         .n_reg_rules = 4,
 120         .alpha2 =  "99",
 121         .reg_rules = {
 122                 REG_RULE(2412-10, 2462+10, 40, 0, 20, 0),
 123                 REG_RULE(2484-10, 2484+10, 40, 0, 20, 0),
 124                 REG_RULE(5150-10, 5240+10, 40, 0, 30, 0),
 125                 REG_RULE(5745-10, 5825+10, 40, 0, 30, 0),
 126         }
 127 };
 128
 129 static const struct ieee80211_regdomain hwsim_world_regdom_custom_02 = {
 130         .n_reg_rules = 2,
 131         .alpha2 =  "99",
 132         .reg_rules = {
 133                 REG_RULE(2412-10, 2462+10, 40, 0, 20, 0),
 134                 REG_RULE(5725-10, 5850+10, 40, 0, 30,
 135                         NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS),
 136         }
 137 };
 138
 139 struct hwsim_vif_priv {
 140         u32 magic;
 141         u8 bssid[ETH_ALEN];
 142         bool assoc;
 143         u16 aid;
 144 };
 145
 146 #define HWSIM_VIF_MAGIC 0x69537748
 147
 148 static inline void hwsim_check_magic(struct ieee80211_vif *vif)
 149 {
 150         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 151         WARN_ON(vp->magic != HWSIM_VIF_MAGIC);
 152 }
 153
 154 static inline void hwsim_set_magic(struct ieee80211_vif *vif)
 155 {
 156         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 157         vp->magic = HWSIM_VIF_MAGIC;
 158 }
 159
 160 static inline void hwsim_clear_magic(struct ieee80211_vif *vif)
 161 {
 162         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 163         vp->magic = 0;
 164 }
 165
 166 struct hwsim_sta_priv {
 167         u32 magic;
 168 };
 169
 170 #define HWSIM_STA_MAGIC 0x6d537748
 171
 172 static inline void hwsim_check_sta_magic(struct ieee80211_sta *sta)
 173 {
 174         struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
 175         WARN_ON(sp->magic != HWSIM_STA_MAGIC);
 176 }
 177
 178 static inline void hwsim_set_sta_magic(struct ieee80211_sta *sta)
 179 {
 180         struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
 181         sp->magic = HWSIM_STA_MAGIC;
 182 }
 183
 184 static inline void hwsim_clear_sta_magic(struct ieee80211_sta *sta)
 185 {
 186         struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
 187         sp->magic = 0;
 188 }
 189
 190 static struct class *hwsim_class;
 191
 192 static struct net_device *hwsim_mon; /* global monitor netdev */
 193
 194 #define CHAN2G(_freq)  { \
 195         .band = IEEE80211_BAND_2GHZ, \
 196         .center_freq = (_freq), \
 197         .hw_value = (_freq), \
 198         .max_power = 20, \
 199 }
 200
 201 #define CHAN5G(_freq) { \
 202         .band = IEEE80211_BAND_5GHZ, \
 203         .center_freq = (_freq), \
 204         .hw_value = (_freq), \
 205         .max_power = 20, \
 206 }
 207
 208 static const struct ieee80211_channel hwsim_channels_2ghz[] = {
 209         CHAN2G(2412), /* Channel 1 */
 210         CHAN2G(2417), /* Channel 2 */
 211         CHAN2G(2422), /* Channel 3 */
 212         CHAN2G(2427), /* Channel 4 */
 213         CHAN2G(2432), /* Channel 5 */
 214         CHAN2G(2437), /* Channel 6 */
 215         CHAN2G(2442), /* Channel 7 */
 216         CHAN2G(2447), /* Channel 8 */
 217         CHAN2G(2452), /* Channel 9 */
 218         CHAN2G(2457), /* Channel 10 */
 219         CHAN2G(2462), /* Channel 11 */
 220         CHAN2G(2467), /* Channel 12 */
 221         CHAN2G(2472), /* Channel 13 */
 222         CHAN2G(2484), /* Channel 14 */
 223 };
 224
 225 static const struct ieee80211_channel hwsim_channels_5ghz[] = {
 226         CHAN5G(5180), /* Channel 36 */
 227         CHAN5G(5200), /* Channel 40 */
 228         CHAN5G(5220), /* Channel 44 */
 229         CHAN5G(5240), /* Channel 48 */
 230
 231         CHAN5G(5260), /* Channel 52 */
 232         CHAN5G(5280), /* Channel 56 */
 233         CHAN5G(5300), /* Channel 60 */
 234         CHAN5G(5320), /* Channel 64 */
 235
 236         CHAN5G(5500), /* Channel 100 */
 237         CHAN5G(5520), /* Channel 104 */
 238         CHAN5G(5540), /* Channel 108 */
 239         CHAN5G(5560), /* Channel 112 */
 240         CHAN5G(5580), /* Channel 116 */
 241         CHAN5G(5600), /* Channel 120 */
 242         CHAN5G(5620), /* Channel 124 */
 243         CHAN5G(5640), /* Channel 128 */
 244         CHAN5G(5660), /* Channel 132 */
 245         CHAN5G(5680), /* Channel 136 */
 246         CHAN5G(5700), /* Channel 140 */
 247
 248         CHAN5G(5745), /* Channel 149 */
 249         CHAN5G(5765), /* Channel 153 */
 250         CHAN5G(5785), /* Channel 157 */
 251         CHAN5G(5805), /* Channel 161 */
 252         CHAN5G(5825), /* Channel 165 */
 253 };
 254
 255 static const struct ieee80211_rate hwsim_rates[] = {
 256         { .bitrate = 10 },
 257         { .bitrate = 20, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
 258         { .bitrate = 55, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
 259         { .bitrate = 110, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
 260         { .bitrate = 60 },
 261         { .bitrate = 90 },
 262         { .bitrate = 120 },
 263         { .bitrate = 180 },
 264         { .bitrate = 240 },
 265         { .bitrate = 360 },
 266         { .bitrate = 480 },
 267         { .bitrate = 540 }
 268 };
 269
 270 static spinlock_t hwsim_radio_lock;
 271 static struct list_head hwsim_radios;
 272
 273 struct mac80211_hwsim_data {
 274         struct list_head list;
 275         struct ieee80211_hw *hw;
 276         struct device *dev;
 277         struct ieee80211_supported_band bands[2];
 278         struct ieee80211_channel channels_2ghz[ARRAY_SIZE(hwsim_channels_2ghz)];
 279         struct ieee80211_channel channels_5ghz[ARRAY_SIZE(hwsim_channels_5ghz)];
 280         struct ieee80211_rate rates[ARRAY_SIZE(hwsim_rates)];
 281
 282         struct ieee80211_channel *channel;
 283         unsigned long beacon_int; /* in jiffies unit */
 284         unsigned int rx_filter;
 285         int started;
 286         struct timer_list beacon_timer;
 287         enum ps_mode {
 288                 PS_DISABLED, PS_ENABLED, PS_AUTO_POLL, PS_MANUAL_POLL
 289         } ps;
 290         bool ps_poll_pending;
 291         struct dentry *debugfs;
 292         struct dentry *debugfs_ps;
 293
 294         /*
 295          * Only radios in the same group can communicate together (the
 296          * channel has to match too). Each bit represents a group. A
 297          * radio can be in more then one group.
 298          */
 299         u64 group;
 300         struct dentry *debugfs_group;
 301 };
 302
 303
 304 struct hwsim_radiotap_hdr {
 305         struct ieee80211_radiotap_header hdr;
 306         u8 rt_flags;
 307         u8 rt_rate;
 308         __le16 rt_channel;
 309         __le16 rt_chbitmask;
 310 } __attribute__ ((packed));
 311
 312
 313 static int hwsim_mon_xmit(struct sk_buff *skb, struct net_device *dev)
 314 {
 315         /* TODO: allow packet injection */
 316         dev_kfree_skb(skb);
 317         return 0;
 318 }
 319
 320
 321 static void mac80211_hwsim_monitor_rx(struct ieee80211_hw *hw,
 322                                       struct sk_buff *tx_skb)
 323 {
 324         struct mac80211_hwsim_data *data = hw->priv;
 325         struct sk_buff *skb;
 326         struct hwsim_radiotap_hdr *hdr;
 327         u16 flags;
 328         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_skb);
 329         struct ieee80211_rate *txrate = ieee80211_get_tx_rate(hw, info);
 330
 331         if (!netif_running(hwsim_mon))
 332                 return;
 333
 334         skb = skb_copy_expand(tx_skb, sizeof(*hdr), 0, GFP_ATOMIC);
 335         if (skb == NULL)
 336                 return;
 337
 338         hdr = (struct hwsim_radiotap_hdr *) skb_push(skb, sizeof(*hdr));
 339         hdr->hdr.it_version = PKTHDR_RADIOTAP_VERSION;
 340         hdr->hdr.it_pad = 0;
 341         hdr->hdr.it_len = cpu_to_le16(sizeof(*hdr));
 342         hdr->hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
 343                                           (1 << IEEE80211_RADIOTAP_RATE) |
 344                                           (1 << IEEE80211_RADIOTAP_CHANNEL));
 345         hdr->rt_flags = 0;
 346         hdr->rt_rate = txrate->bitrate / 5;
 347         hdr->rt_channel = cpu_to_le16(data->channel->center_freq);
 348         flags = IEEE80211_CHAN_2GHZ;
 349         if (txrate->flags & IEEE80211_RATE_ERP_G)
 350                 flags |= IEEE80211_CHAN_OFDM;
 351         else
 352                 flags |= IEEE80211_CHAN_CCK;
 353         hdr->rt_chbitmask = cpu_to_le16(flags);
 354
 355         skb->dev = hwsim_mon;
 356         skb_set_mac_header(skb, 0);
 357         skb->ip_summed = CHECKSUM_UNNECESSARY;
 358         skb->pkt_type = PACKET_OTHERHOST;
 359         skb->protocol = htons(ETH_P_802_2);
 360         memset(skb->cb, 0, sizeof(skb->cb));
 361         netif_rx(skb);
 362 }
 363
 364
 365 static bool hwsim_ps_rx_ok(struct mac80211_hwsim_data *data,
 366                            struct sk_buff *skb)
 367 {
 368         switch (data->ps) {
 369         case PS_DISABLED:
 370                 return true;
 371         case PS_ENABLED:
 372                 return false;
 373         case PS_AUTO_POLL:
 374                 /* TODO: accept (some) Beacons by default and other frames only
 375                  * if pending PS-Poll has been sent */
 376                 return true;
 377         case PS_MANUAL_POLL:
 378                 /* Allow unicast frames to own address if there is a pending
 379                  * PS-Poll */
 380                 if (data->ps_poll_pending &&
 381                     memcmp(data->hw->wiphy->perm_addr, skb->data + 4,
 382                            ETH_ALEN) == 0) {
 383                         data->ps_poll_pending = false;
 384                         return true;
 385                 }
 386                 return false;
 387         }
 388
 389         return true;
 390 }
 391
 392
 393 static bool mac80211_hwsim_tx_frame(struct ieee80211_hw *hw,
 394                                     struct sk_buff *skb)
 395 {
 396         struct mac80211_hwsim_data *data = hw->priv, *data2;
 397         bool ack = false;
 398         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 399         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 400         struct ieee80211_rx_status rx_status;
 401
 402         memset(&rx_status, 0, sizeof(rx_status));
 403         /* TODO: set mactime */
 404         rx_status.freq = data->channel->center_freq;
 405         rx_status.band = data->channel->band;
 406         rx_status.rate_idx = info->control.rates[0].idx;
 407         /* TODO: simulate signal strength (and optional packet drop) */
 408
 409         if (data->ps != PS_DISABLED)
 410                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 411
 412         /* Copy skb to all enabled radios that are on the current frequency */
 413         spin_lock(&hwsim_radio_lock);
 414         list_for_each_entry(data2, &hwsim_radios, list) {
 415                 struct sk_buff *nskb;
 416
 417                 if (data == data2)
 418                         continue;
 419
 420                 if (!data2->started || !hwsim_ps_rx_ok(data2, skb) ||
 421                     !data->channel || !data2->channel ||
 422                     data->channel->center_freq != data2->channel->center_freq ||
 423                     !(data->group & data2->group))
 424                         continue;
 425
 426                 nskb = skb_copy(skb, GFP_ATOMIC);
 427                 if (nskb == NULL)
 428                         continue;
 429
 430                 if (memcmp(hdr->addr1, data2->hw->wiphy->perm_addr,
 431                            ETH_ALEN) == 0)
 432                         ack = true;
 433                 ieee80211_rx_irqsafe(data2->hw, nskb, &rx_status);
 434         }
 435         spin_unlock(&hwsim_radio_lock);
 436
 437         return ack;
 438 }
 439
 440
 441 static int mac80211_hwsim_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 442 {
 443         bool ack;
 444         struct ieee80211_tx_info *txi;
 445
 446         mac80211_hwsim_monitor_rx(hw, skb);
 447
 448         if (skb->len < 10) {
 449                 /* Should not happen; just a sanity check for addr1 use */
 450                 dev_kfree_skb(skb);
 451                 return NETDEV_TX_OK;
 452         }
 453
 454         ack = mac80211_hwsim_tx_frame(hw, skb);
 455
 456         txi = IEEE80211_SKB_CB(skb);
 457
 458         if (txi->control.vif)
 459                 hwsim_check_magic(txi->control.vif);
 460         if (txi->control.sta)
 461                 hwsim_check_sta_magic(txi->control.sta);
 462
 463         ieee80211_tx_info_clear_status(txi);
 464         if (!(txi->flags & IEEE80211_TX_CTL_NO_ACK) && ack)
 465                 txi->flags |= IEEE80211_TX_STAT_ACK;
 466         ieee80211_tx_status_irqsafe(hw, skb);
 467         return NETDEV_TX_OK;
 468 }
 469
 470
 471 static int mac80211_hwsim_start(struct ieee80211_hw *hw)
 472 {
 473         struct mac80211_hwsim_data *data = hw->priv;
 474         printk(KERN_DEBUG "%s:%s\n", wiphy_name(hw->wiphy), __func__);
 475         data->started = 1;
 476         return 0;
 477 }
 478
 479
 480 static void mac80211_hwsim_stop(struct ieee80211_hw *hw)
 481 {
 482         struct mac80211_hwsim_data *data = hw->priv;
 483         data->started = 0;
 484         del_timer(&data->beacon_timer);
 485         printk(KERN_DEBUG "%s:%s\n", wiphy_name(hw->wiphy), __func__);
 486 }
 487
 488
 489 static int mac80211_hwsim_add_interface(struct ieee80211_hw *hw,
 490                                         struct ieee80211_if_init_conf *conf)
 491 {
 492         printk(KERN_DEBUG "%s:%s (type=%d mac_addr=%pM)\n",
 493                wiphy_name(hw->wiphy), __func__, conf->type,
 494                conf->mac_addr);
 495         hwsim_set_magic(conf->vif);
 496         return 0;
 497 }
 498
 499
 500 static void mac80211_hwsim_remove_interface(
 501         struct ieee80211_hw *hw, struct ieee80211_if_init_conf *conf)
 502 {
 503         printk(KERN_DEBUG "%s:%s (type=%d mac_addr=%pM)\n",
 504                wiphy_name(hw->wiphy), __func__, conf->type,
 505                conf->mac_addr);
 506         hwsim_check_magic(conf->vif);
 507         hwsim_clear_magic(conf->vif);
 508 }
 509
 510
 511 static void mac80211_hwsim_beacon_tx(void *arg, u8 *mac,
 512                                      struct ieee80211_vif *vif)
 513 {
 514         struct ieee80211_hw *hw = arg;
 515         struct sk_buff *skb;
 516         struct ieee80211_tx_info *info;
 517
 518         hwsim_check_magic(vif);
 519
 520         if (vif->type != NL80211_IFTYPE_AP &&
 521             vif->type != NL80211_IFTYPE_MESH_POINT)
 522                 return;
 523
 524         skb = ieee80211_beacon_get(hw, vif);
 525         if (skb == NULL)
 526                 return;
 527         info = IEEE80211_SKB_CB(skb);
 528
 529         mac80211_hwsim_monitor_rx(hw, skb);
 530         mac80211_hwsim_tx_frame(hw, skb);
 531         dev_kfree_skb(skb);
 532 }
 533
 534
 535 static void mac80211_hwsim_beacon(unsigned long arg)
 536 {
 537         struct ieee80211_hw *hw = (struct ieee80211_hw *) arg;
 538         struct mac80211_hwsim_data *data = hw->priv;
 539
 540         if (!data->started)
 541                 return;
 542
 543         ieee80211_iterate_active_interfaces_atomic(
 544                 hw, mac80211_hwsim_beacon_tx, hw);
 545
 546         data->beacon_timer.expires = jiffies + data->beacon_int;
 547         add_timer(&data->beacon_timer);
 548 }
 549
 550
 551 static int mac80211_hwsim_config(struct ieee80211_hw *hw, u32 changed)
 552 {
 553         struct mac80211_hwsim_data *data = hw->priv;
 554         struct ieee80211_conf *conf = &hw->conf;
 555
 556         printk(KERN_DEBUG "%s:%s (freq=%d idle=%d ps=%d)\n",
 557                wiphy_name(hw->wiphy), __func__,
 558                conf->channel->center_freq,
 559                !!(conf->flags & IEEE80211_CONF_IDLE),
 560                !!(conf->flags & IEEE80211_CONF_PS));
 561
 562         data->channel = conf->channel;
 563         if (!data->started || !data->beacon_int)
 564                 del_timer(&data->beacon_timer);
 565         else
 566                 mod_timer(&data->beacon_timer, jiffies + data->beacon_int);
 567
 568         return 0;
 569 }
 570
 571
 572 static void mac80211_hwsim_configure_filter(struct ieee80211_hw *hw,
 573                                             unsigned int changed_flags,
 574                                             unsigned int *total_flags,
 575                                             int mc_count,
 576                                             struct dev_addr_list *mc_list)
 577 {
 578         struct mac80211_hwsim_data *data = hw->priv;
 579
 580         printk(KERN_DEBUG "%s:%s\n", wiphy_name(hw->wiphy), __func__);
 581
 582         data->rx_filter = 0;
 583         if (*total_flags & FIF_PROMISC_IN_BSS)
 584                 data->rx_filter |= FIF_PROMISC_IN_BSS;
 585         if (*total_flags & FIF_ALLMULTI)
 586                 data->rx_filter |= FIF_ALLMULTI;
 587
 588         *total_flags = data->rx_filter;
 589 }
 590
 591 static void mac80211_hwsim_bss_info_changed(struct ieee80211_hw *hw,
 592                                             struct ieee80211_vif *vif,
 593                                             struct ieee80211_bss_conf *info,
 594                                             u32 changed)
 595 {
 596         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 597         struct mac80211_hwsim_data *data = hw->priv;
 598
 599         hwsim_check_magic(vif);
 600
 601         printk(KERN_DEBUG "%s:%s(changed=0x%x)\n",
 602                wiphy_name(hw->wiphy), __func__, changed);
 603
 604         if (changed & BSS_CHANGED_BSSID) {
 605                 printk(KERN_DEBUG "%s:%s: BSSID changed: %pM\n",
 606                        wiphy_name(hw->wiphy), __func__,
 607                        info->bssid);
 608                 memcpy(vp->bssid, info->bssid, ETH_ALEN);
 609         }
 610
 611         if (changed & BSS_CHANGED_ASSOC) {
 612                 printk(KERN_DEBUG "  %s: ASSOC: assoc=%d aid=%d\n",
 613                        wiphy_name(hw->wiphy), info->assoc, info->aid);
 614                 vp->assoc = info->assoc;
 615                 vp->aid = info->aid;
 616         }
 617
 618         if (changed & BSS_CHANGED_BEACON_INT) {
 619                 printk(KERN_DEBUG "  %s: BCNINT: %d\n",
 620                        wiphy_name(hw->wiphy), info->beacon_int);
 621                 data->beacon_int = 1024 * info->beacon_int / 1000 * HZ / 1000;
 622                 if (WARN_ON(!data->beacon_int))
 623                         data->beacon_int = 1;
 624         }
 625
 626         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
 627                 printk(KERN_DEBUG "  %s: ERP_CTS_PROT: %d\n",
 628                        wiphy_name(hw->wiphy), info->use_cts_prot);
 629         }
 630
 631         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
 632                 printk(KERN_DEBUG "  %s: ERP_PREAMBLE: %d\n",
 633                        wiphy_name(hw->wiphy), info->use_short_preamble);
 634         }
 635
 636         if (changed & BSS_CHANGED_ERP_SLOT) {
 637                 printk(KERN_DEBUG "  %s: ERP_SLOT: %d\n",
 638                        wiphy_name(hw->wiphy), info->use_short_slot);
 639         }
 640
 641         if (changed & BSS_CHANGED_HT) {
 642                 printk(KERN_DEBUG "  %s: HT: op_mode=0x%x\n",
 643                        wiphy_name(hw->wiphy),
 644                        info->ht_operation_mode);
 645         }
 646
 647         if (changed & BSS_CHANGED_BASIC_RATES) {
 648                 printk(KERN_DEBUG "  %s: BASIC_RATES: 0x%llx\n",
 649                        wiphy_name(hw->wiphy),
 650                        (unsigned long long) info->basic_rates);
 651         }
 652 }
 653
 654 static void mac80211_hwsim_sta_notify(struct ieee80211_hw *hw,
 655                                       struct ieee80211_vif *vif,
 656                                       enum sta_notify_cmd cmd,
 657                                       struct ieee80211_sta *sta)
 658 {
 659         hwsim_check_magic(vif);
 660         switch (cmd) {
 661         case STA_NOTIFY_ADD:
 662                 hwsim_set_sta_magic(sta);
 663                 break;
 664         case STA_NOTIFY_REMOVE:
 665                 hwsim_clear_sta_magic(sta);
 666                 break;
 667         case STA_NOTIFY_SLEEP:
 668         case STA_NOTIFY_AWAKE:
 669                 /* TODO: make good use of these flags */
 670                 break;
 671         }
 672 }
 673
 674 static int mac80211_hwsim_set_tim(struct ieee80211_hw *hw,
 675                                   struct ieee80211_sta *sta,
 676                                   bool set)
 677 {
 678         hwsim_check_sta_magic(sta);
 679         return 0;
 680 }
 681
 682 static int mac80211_hwsim_conf_tx(
 683         struct ieee80211_hw *hw, u16 queue,
 684         const struct ieee80211_tx_queue_params *params)
 685 {
 686         printk(KERN_DEBUG "%s:%s (queue=%d txop=%d cw_min=%d cw_max=%d "
 687                "aifs=%d)\n",
 688                wiphy_name(hw->wiphy), __func__, queue,
 689                params->txop, params->cw_min, params->cw_max, params->aifs);
 690         return 0;
 691 }
 692
 693 static const struct ieee80211_ops mac80211_hwsim_ops =
 694 {
 695         .tx = mac80211_hwsim_tx,
 696         .start = mac80211_hwsim_start,
 697         .stop = mac80211_hwsim_stop,
 698         .add_interface = mac80211_hwsim_add_interface,
 699         .remove_interface = mac80211_hwsim_remove_interface,
 700         .config = mac80211_hwsim_config,
 701         .configure_filter = mac80211_hwsim_configure_filter,
 702         .bss_info_changed = mac80211_hwsim_bss_info_changed,
 703         .sta_notify = mac80211_hwsim_sta_notify,
 704         .set_tim = mac80211_hwsim_set_tim,
 705         .conf_tx = mac80211_hwsim_conf_tx,
 706 };
 707
 708
 709 static void mac80211_hwsim_free(void)
 710 {
 711         struct list_head tmplist, *i, *tmp;
 712         struct mac80211_hwsim_data *data, *tmpdata;
 713
 714         INIT_LIST_HEAD(&tmplist);
 715
 716         spin_lock_bh(&hwsim_radio_lock);
 717         list_for_each_safe(i, tmp, &hwsim_radios)
 718                 list_move(i, &tmplist);
 719         spin_unlock_bh(&hwsim_radio_lock);
 720
 721         list_for_each_entry_safe(data, tmpdata, &tmplist, list) {
 722                 debugfs_remove(data->debugfs_group);
 723                 debugfs_remove(data->debugfs_ps);
 724                 debugfs_remove(data->debugfs);
 725                 ieee80211_unregister_hw(data->hw);
 726                 device_unregister(data->dev);
 727                 ieee80211_free_hw(data->hw);
 728         }
 729         class_destroy(hwsim_class);
 730 }
 731
 732
 733 static struct device_driver mac80211_hwsim_driver = {
 734         .name = "mac80211_hwsim"
 735 };
 736
 737 static const struct net_device_ops hwsim_netdev_ops = {
 738         .ndo_start_xmit         = hwsim_mon_xmit,
 739         .ndo_change_mtu         = eth_change_mtu,
 740         .ndo_set_mac_address    = eth_mac_addr,
 741         .ndo_validate_addr      = eth_validate_addr,
 742 };
 743
 744 static void hwsim_mon_setup(struct net_device *dev)
 745 {
 746         dev->netdev_ops = &hwsim_netdev_ops;
 747         dev->destructor = free_netdev;
 748         ether_setup(dev);
 749         dev->tx_queue_len = 0;
 750         dev->type = ARPHRD_IEEE80211_RADIOTAP;
 751         memset(dev->dev_addr, 0, ETH_ALEN);
 752         dev->dev_addr[0] = 0x12;
 753 }
 754
 755
 756 static void hwsim_send_ps_poll(void *dat, u8 *mac, struct ieee80211_vif *vif)
 757 {
 758         struct mac80211_hwsim_data *data = dat;
 759         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 760         DECLARE_MAC_BUF(buf);
 761         struct sk_buff *skb;
 762         struct ieee80211_pspoll *pspoll;
 763
 764         if (!vp->assoc)
 765                 return;
 766
 767         printk(KERN_DEBUG "%s:%s: send PS-Poll to %pM for aid %d\n",
 768                wiphy_name(data->hw->wiphy), __func__, vp->bssid, vp->aid);
 769
 770         skb = dev_alloc_skb(sizeof(*pspoll));
 771         if (!skb)
 772                 return;
 773         pspoll = (void *) skb_put(skb, sizeof(*pspoll));
 774         pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
 775                                             IEEE80211_STYPE_PSPOLL |
 776                                             IEEE80211_FCTL_PM);
 777         pspoll->aid = cpu_to_le16(0xc000 | vp->aid);
 778         memcpy(pspoll->bssid, vp->bssid, ETH_ALEN);
 779         memcpy(pspoll->ta, mac, ETH_ALEN);
 780         if (!mac80211_hwsim_tx_frame(data->hw, skb))
 781                 printk(KERN_DEBUG "%s: PS-Poll frame not ack'ed\n", __func__);
 782         dev_kfree_skb(skb);
 783 }
 784
 785
 786 static void hwsim_send_nullfunc(struct mac80211_hwsim_data *data, u8 *mac,
 787                                 struct ieee80211_vif *vif, int ps)
 788 {
 789         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 790         DECLARE_MAC_BUF(buf);
 791         struct sk_buff *skb;
 792         struct ieee80211_hdr *hdr;
 793
 794         if (!vp->assoc)
 795                 return;
 796
 797         printk(KERN_DEBUG "%s:%s: send data::nullfunc to %pM ps=%d\n",
 798                wiphy_name(data->hw->wiphy), __func__, vp->bssid, ps);
 799
 800         skb = dev_alloc_skb(sizeof(*hdr));
 801         if (!skb)
 802                 return;
 803         hdr = (void *) skb_put(skb, sizeof(*hdr) - ETH_ALEN);
 804         hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
 805                                          IEEE80211_STYPE_NULLFUNC |
 806                                          (ps ? IEEE80211_FCTL_PM : 0));
 807         hdr->duration_id = cpu_to_le16(0);
 808         memcpy(hdr->addr1, vp->bssid, ETH_ALEN);
 809         memcpy(hdr->addr2, mac, ETH_ALEN);
 810         memcpy(hdr->addr3, vp->bssid, ETH_ALEN);
 811         if (!mac80211_hwsim_tx_frame(data->hw, skb))
 812                 printk(KERN_DEBUG "%s: nullfunc frame not ack'ed\n", __func__);
 813         dev_kfree_skb(skb);
 814 }
 815
 816
 817 static void hwsim_send_nullfunc_ps(void *dat, u8 *mac,
 818                                    struct ieee80211_vif *vif)
 819 {
 820         struct mac80211_hwsim_data *data = dat;
 821         hwsim_send_nullfunc(data, mac, vif, 1);
 822 }
 823
 824
 825 static void hwsim_send_nullfunc_no_ps(void *dat, u8 *mac,
 826                                       struct ieee80211_vif *vif)
 827 {
 828         struct mac80211_hwsim_data *data = dat;
 829         hwsim_send_nullfunc(data, mac, vif, 0);
 830 }
 831
 832
 833 static int hwsim_fops_ps_read(void *dat, u64 *val)
 834 {
 835         struct mac80211_hwsim_data *data = dat;
 836         *val = data->ps;
 837         return 0;
 838 }
 839
 840 static int hwsim_fops_ps_write(void *dat, u64 val)
 841 {
 842         struct mac80211_hwsim_data *data = dat;
 843         enum ps_mode old_ps;
 844
 845         if (val != PS_DISABLED && val != PS_ENABLED && val != PS_AUTO_POLL &&
 846             val != PS_MANUAL_POLL)
 847                 return -EINVAL;
 848
 849         old_ps = data->ps;
 850         data->ps = val;
 851
 852         if (val == PS_MANUAL_POLL) {
 853                 ieee80211_iterate_active_interfaces(data->hw,
 854                                                     hwsim_send_ps_poll, data);
 855                 data->ps_poll_pending = true;
 856         } else if (old_ps == PS_DISABLED && val != PS_DISABLED) {
 857                 ieee80211_iterate_active_interfaces(data->hw,
 858                                                     hwsim_send_nullfunc_ps,
 859                                                     data);
 860         } else if (old_ps != PS_DISABLED && val == PS_DISABLED) {
 861                 ieee80211_iterate_active_interfaces(data->hw,
 862                                                     hwsim_send_nullfunc_no_ps,
 863                                                     data);
 864         }
 865
 866         return 0;
 867 }
 868
 869 DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_ps, hwsim_fops_ps_read, hwsim_fops_ps_write,
 870                         "%llu\n");
 871
 872
 873 static int hwsim_fops_group_read(void *dat, u64 *val)
 874 {
 875         struct mac80211_hwsim_data *data = dat;
 876         *val = data->group;
 877         return 0;
 878 }
 879
 880 static int hwsim_fops_group_write(void *dat, u64 val)
 881 {
 882         struct mac80211_hwsim_data *data = dat;
 883         data->group = val;
 884         return 0;
 885 }
 886
 887 DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_group,
 888                         hwsim_fops_group_read, hwsim_fops_group_write,
 889                         "%llx\n");
 890
 891 static int __init init_mac80211_hwsim(void)
 892 {
 893         int i, err = 0;
 894         u8 addr[ETH_ALEN];
 895         struct mac80211_hwsim_data *data;
 896         struct ieee80211_hw *hw;
 897         enum ieee80211_band band;
 898
 899         if (radios < 1 || radios > 100)
 900                 return -EINVAL;
 901
 902         spin_lock_init(&hwsim_radio_lock);
 903         INIT_LIST_HEAD(&hwsim_radios);
 904
 905         hwsim_class = class_create(THIS_MODULE, "mac80211_hwsim");
 906         if (IS_ERR(hwsim_class))
 907                 return PTR_ERR(hwsim_class);
 908
 909         memset(addr, 0, ETH_ALEN);
 910         addr[0] = 0x02;
 911
 912         for (i = 0; i < radios; i++) {
 913                 printk(KERN_DEBUG "mac80211_hwsim: Initializing radio %d\n",
 914                        i);
 915                 hw = ieee80211_alloc_hw(sizeof(*data), &mac80211_hwsim_ops);
 916                 if (!hw) {
 917                         printk(KERN_DEBUG "mac80211_hwsim: ieee80211_alloc_hw "
 918                                "failed\n");
 919                         err = -ENOMEM;
 920                         goto failed;
 921                 }
 922                 data = hw->priv;
 923                 data->hw = hw;
 924
 925                 data->dev = device_create(hwsim_class, NULL, 0, hw,
 926                                           "hwsim%d", i);
 927                 if (IS_ERR(data->dev)) {
 928                         printk(KERN_DEBUG
 929                                "mac80211_hwsim: device_create "
 930                                "failed (%ld)\n", PTR_ERR(data->dev));
 931                         err = -ENOMEM;
 932                         goto failed_drvdata;
 933                 }
 934                 data->dev->driver = &mac80211_hwsim_driver;
 935
 936                 SET_IEEE80211_DEV(hw, data->dev);
 937                 addr[3] = i >> 8;
 938                 addr[4] = i;
 939                 SET_IEEE80211_PERM_ADDR(hw, addr);
 940
 941                 hw->channel_change_time = 1;
 942                 hw->queues = 4;
 943                 hw->wiphy->interface_modes =
 944                         BIT(NL80211_IFTYPE_STATION) |
 945                         BIT(NL80211_IFTYPE_AP) |
 946                         BIT(NL80211_IFTYPE_MESH_POINT);
 947
 948                 hw->flags = IEEE80211_HW_MFP_CAPABLE;
 949
 950                 /* ask mac80211 to reserve space for magic */
 951                 hw->vif_data_size = sizeof(struct hwsim_vif_priv);
 952                 hw->sta_data_size = sizeof(struct hwsim_sta_priv);
 953
 954                 memcpy(data->channels_2ghz, hwsim_channels_2ghz,
 955                         sizeof(hwsim_channels_2ghz));
 956                 memcpy(data->channels_5ghz, hwsim_channels_5ghz,
 957                         sizeof(hwsim_channels_5ghz));
 958                 memcpy(data->rates, hwsim_rates, sizeof(hwsim_rates));
 959
 960                 for (band = IEEE80211_BAND_2GHZ; band < IEEE80211_NUM_BANDS; band++) {
 961                         struct ieee80211_supported_band *sband = &data->bands[band];
 962                         switch (band) {
 963                         case IEEE80211_BAND_2GHZ:
 964                                 sband->channels = data->channels_2ghz;
 965                                 sband->n_channels =
 966                                         ARRAY_SIZE(hwsim_channels_2ghz);
 967                                 break;
 968                         case IEEE80211_BAND_5GHZ:
 969                                 sband->channels = data->channels_5ghz;
 970                                 sband->n_channels =
 971                                         ARRAY_SIZE(hwsim_channels_5ghz);
 972                                 break;
 973                         default:
 974                                 break;
 975                         }
 976
 977                         sband->bitrates = data->rates;
 978                         sband->n_bitrates = ARRAY_SIZE(hwsim_rates);
 979
 980                         sband->ht_cap.ht_supported = true;
 981                         sband->ht_cap.cap = IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
 982                                 IEEE80211_HT_CAP_GRN_FLD |
 983                                 IEEE80211_HT_CAP_SGI_40 |
 984                                 IEEE80211_HT_CAP_DSSSCCK40;
 985                         sband->ht_cap.ampdu_factor = 0x3;
 986                         sband->ht_cap.ampdu_density = 0x6;
 987                         memset(&sband->ht_cap.mcs, 0,
 988                                sizeof(sband->ht_cap.mcs));
 989                         sband->ht_cap.mcs.rx_mask[0] = 0xff;
 990                         sband->ht_cap.mcs.rx_mask[1] = 0xff;
 991                         sband->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
 992
 993                         hw->wiphy->bands[band] = sband;
 994                 }
 995                 /* By default all radios are belonging to the first group */
 996                 data->group = 1;
 997
 998                 /* Work to be done prior to ieee80211_register_hw() */
 999                 switch (regtest) {
1000                 case HWSIM_REGTEST_DISABLED:
1001                 case HWSIM_REGTEST_DRIVER_REG_FOLLOW:
1002                 case HWSIM_REGTEST_DRIVER_REG_ALL:
1003                 case HWSIM_REGTEST_DIFF_COUNTRY:
1004                         /*
1005                          * Nothing to be done for driver regulatory domain
1006                          * hints prior to ieee80211_register_hw()
1007                          */
1008                         break;
1009                 case HWSIM_REGTEST_WORLD_ROAM:
1010                         if (i == 0) {
1011                                 hw->wiphy->custom_regulatory = true;
1012                                 wiphy_apply_custom_regulatory(hw->wiphy,
1013                                         &hwsim_world_regdom_custom_01);
1014                         }
1015                         break;
1016                 case HWSIM_REGTEST_CUSTOM_WORLD:
1017                         hw->wiphy->custom_regulatory = true;
1018                         wiphy_apply_custom_regulatory(hw->wiphy,
1019                                 &hwsim_world_regdom_custom_01);
1020                         break;
1021                 case HWSIM_REGTEST_CUSTOM_WORLD_2:
1022                         if (i == 0) {
1023                                 hw->wiphy->custom_regulatory = true;
1024                                 wiphy_apply_custom_regulatory(hw->wiphy,
1025                                         &hwsim_world_regdom_custom_01);
1026                         } else if (i == 1) {
1027                                 hw->wiphy->custom_regulatory = true;
1028                                 wiphy_apply_custom_regulatory(hw->wiphy,
1029                                         &hwsim_world_regdom_custom_02);
1030                         }
1031                         break;
1032                 case HWSIM_REGTEST_STRICT_ALL:
1033                         hw->wiphy->strict_regulatory = true;
1034                         break;
1035                 case HWSIM_REGTEST_STRICT_FOLLOW:
1036                 case HWSIM_REGTEST_STRICT_AND_DRIVER_REG:
1037                         if (i == 0)
1038                                 hw->wiphy->strict_regulatory = true;
1039                         break;
1040                 case HWSIM_REGTEST_ALL:
1041                         if (i == 0) {
1042                                 hw->wiphy->custom_regulatory = true;
1043                                 wiphy_apply_custom_regulatory(hw->wiphy,
1044                                         &hwsim_world_regdom_custom_01);
1045                         } else if (i == 1) {
1046                                 hw->wiphy->custom_regulatory = true;
1047                                 wiphy_apply_custom_regulatory(hw->wiphy,
1048                                         &hwsim_world_regdom_custom_02);
1049                         } else if (i == 4)
1050                                 hw->wiphy->strict_regulatory = true;
1051                         break;
1052                 default:
1053                         break;
1054                 }
1055
1056                 /* give the regulatory workqueue a chance to run */
1057                 if (regtest)
1058                         schedule_timeout_interruptible(1);
1059                 err = ieee80211_register_hw(hw);
1060                 if (err < 0) {
1061                         printk(KERN_DEBUG "mac80211_hwsim: "
1062                                "ieee80211_register_hw failed (%d)\n", err);
1063                         goto failed_hw;
1064                 }
1065
1066                 /* Work to be done after to ieee80211_register_hw() */
1067                 switch (regtest) {
1068                 case HWSIM_REGTEST_WORLD_ROAM:
1069                 case HWSIM_REGTEST_DISABLED:
1070                         break;
1071                 case HWSIM_REGTEST_DRIVER_REG_FOLLOW:
1072                         if (!i)
1073                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
1074                         break;
1075                 case HWSIM_REGTEST_DRIVER_REG_ALL:
1076                 case HWSIM_REGTEST_STRICT_ALL:
1077                         regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
1078                         break;
1079                 case HWSIM_REGTEST_DIFF_COUNTRY:
1080                         if (i < ARRAY_SIZE(hwsim_alpha2s))
1081                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[i]);
1082                         break;
1083                 case HWSIM_REGTEST_CUSTOM_WORLD:
1084                 case HWSIM_REGTEST_CUSTOM_WORLD_2:
1085                         /*
1086                          * Nothing to be done for custom world regulatory
1087                          * domains after to ieee80211_register_hw
1088                          */
1089                         break;
1090                 case HWSIM_REGTEST_STRICT_FOLLOW:
1091                         if (i == 0)
1092                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
1093                         break;
1094                 case HWSIM_REGTEST_STRICT_AND_DRIVER_REG:
1095                         if (i == 0)
1096                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
1097                         else if (i == 1)
1098                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[1]);
1099                         break;
1100                 case HWSIM_REGTEST_ALL:
1101                         if (i == 2)
1102                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
1103                         else if (i == 3)
1104                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[1]);
1105                         else if (i == 4)
1106                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[2]);
1107                         break;
1108                 default:
1109                         break;
1110                 }
1111
1112                 printk(KERN_DEBUG "%s: hwaddr %pM registered\n",
1113                        wiphy_name(hw->wiphy),
1114                        hw->wiphy->perm_addr);
1115
1116                 data->debugfs = debugfs_create_dir("hwsim",
1117                                                    hw->wiphy->debugfsdir);
1118                 data->debugfs_ps = debugfs_create_file("ps", 0666,
1119                                                        data->debugfs, data,
1120                                                        &hwsim_fops_ps);
1121                 data->debugfs_group = debugfs_create_file("group", 0666,
1122                                                         data->debugfs, data,
1123                                                         &hwsim_fops_group);
1124
1125                 setup_timer(&data->beacon_timer, mac80211_hwsim_beacon,
1126                             (unsigned long) hw);
1127
1128                 list_add_tail(&data->list, &hwsim_radios);
1129         }
1130
1131         hwsim_mon = alloc_netdev(0, "hwsim%d", hwsim_mon_setup);
1132         if (hwsim_mon == NULL)
1133                 goto failed;
1134
1135         rtnl_lock();
1136
1137         err = dev_alloc_name(hwsim_mon, hwsim_mon->name);
1138         if (err < 0)
1139                 goto failed_mon;
1140
1141
1142         err = register_netdevice(hwsim_mon);
1143         if (err < 0)
1144                 goto failed_mon;
1145
1146         rtnl_unlock();
1147
1148         return 0;
1149
1150 failed_mon:
1151         rtnl_unlock();
1152         free_netdev(hwsim_mon);
1153         mac80211_hwsim_free();
1154         return err;
1155
1156 failed_hw:
1157         device_unregister(data->dev);
1158 failed_drvdata:
1159         ieee80211_free_hw(hw);
1160 failed:
1161         mac80211_hwsim_free();
1162         return err;
1163 }
1164
1165
1166 static void __exit exit_mac80211_hwsim(void)
1167 {
1168         printk(KERN_DEBUG "mac80211_hwsim: unregister radios\n");
1169
1170         mac80211_hwsim_free();
1171         unregister_netdev(hwsim_mon);
1172 }
1173
1174
1175 module_init(init_mac80211_hwsim);
1176 module_exit(exit_mac80211_hwsim);