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         int radio_enabled;
 284         unsigned long beacon_int; /* in jiffies unit */
 285         unsigned int rx_filter;
 286         int started;
 287         struct timer_list beacon_timer;
 288         enum ps_mode {
 289                 PS_DISABLED, PS_ENABLED, PS_AUTO_POLL, PS_MANUAL_POLL
 290         } ps;
 291         bool ps_poll_pending;
 292         struct dentry *debugfs;
 293         struct dentry *debugfs_ps;
 294 };
 295
 296
 297 struct hwsim_radiotap_hdr {
 298         struct ieee80211_radiotap_header hdr;
 299         u8 rt_flags;
 300         u8 rt_rate;
 301         __le16 rt_channel;
 302         __le16 rt_chbitmask;
 303 } __attribute__ ((packed));
 304
 305
 306 static int hwsim_mon_xmit(struct sk_buff *skb, struct net_device *dev)
 307 {
 308         /* TODO: allow packet injection */
 309         dev_kfree_skb(skb);
 310         return 0;
 311 }
 312
 313
 314 static void mac80211_hwsim_monitor_rx(struct ieee80211_hw *hw,
 315                                       struct sk_buff *tx_skb)
 316 {
 317         struct mac80211_hwsim_data *data = hw->priv;
 318         struct sk_buff *skb;
 319         struct hwsim_radiotap_hdr *hdr;
 320         u16 flags;
 321         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_skb);
 322         struct ieee80211_rate *txrate = ieee80211_get_tx_rate(hw, info);
 323
 324         if (!netif_running(hwsim_mon))
 325                 return;
 326
 327         skb = skb_copy_expand(tx_skb, sizeof(*hdr), 0, GFP_ATOMIC);
 328         if (skb == NULL)
 329                 return;
 330
 331         hdr = (struct hwsim_radiotap_hdr *) skb_push(skb, sizeof(*hdr));
 332         hdr->hdr.it_version = PKTHDR_RADIOTAP_VERSION;
 333         hdr->hdr.it_pad = 0;
 334         hdr->hdr.it_len = cpu_to_le16(sizeof(*hdr));
 335         hdr->hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
 336                                           (1 << IEEE80211_RADIOTAP_RATE) |
 337                                           (1 << IEEE80211_RADIOTAP_CHANNEL));
 338         hdr->rt_flags = 0;
 339         hdr->rt_rate = txrate->bitrate / 5;
 340         hdr->rt_channel = cpu_to_le16(data->channel->center_freq);
 341         flags = IEEE80211_CHAN_2GHZ;
 342         if (txrate->flags & IEEE80211_RATE_ERP_G)
 343                 flags |= IEEE80211_CHAN_OFDM;
 344         else
 345                 flags |= IEEE80211_CHAN_CCK;
 346         hdr->rt_chbitmask = cpu_to_le16(flags);
 347
 348         skb->dev = hwsim_mon;
 349         skb_set_mac_header(skb, 0);
 350         skb->ip_summed = CHECKSUM_UNNECESSARY;
 351         skb->pkt_type = PACKET_OTHERHOST;
 352         skb->protocol = htons(ETH_P_802_2);
 353         memset(skb->cb, 0, sizeof(skb->cb));
 354         netif_rx(skb);
 355 }
 356
 357
 358 static bool hwsim_ps_rx_ok(struct mac80211_hwsim_data *data,
 359                            struct sk_buff *skb)
 360 {
 361         switch (data->ps) {
 362         case PS_DISABLED:
 363                 return true;
 364         case PS_ENABLED:
 365                 return false;
 366         case PS_AUTO_POLL:
 367                 /* TODO: accept (some) Beacons by default and other frames only
 368                  * if pending PS-Poll has been sent */
 369                 return true;
 370         case PS_MANUAL_POLL:
 371                 /* Allow unicast frames to own address if there is a pending
 372                  * PS-Poll */
 373                 if (data->ps_poll_pending &&
 374                     memcmp(data->hw->wiphy->perm_addr, skb->data + 4,
 375                            ETH_ALEN) == 0) {
 376                         data->ps_poll_pending = false;
 377                         return true;
 378                 }
 379                 return false;
 380         }
 381
 382         return true;
 383 }
 384
 385
 386 static bool mac80211_hwsim_tx_frame(struct ieee80211_hw *hw,
 387                                     struct sk_buff *skb)
 388 {
 389         struct mac80211_hwsim_data *data = hw->priv, *data2;
 390         bool ack = false;
 391         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 392         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 393         struct ieee80211_rx_status rx_status;
 394
 395         memset(&rx_status, 0, sizeof(rx_status));
 396         /* TODO: set mactime */
 397         rx_status.freq = data->channel->center_freq;
 398         rx_status.band = data->channel->band;
 399         rx_status.rate_idx = info->control.rates[0].idx;
 400         /* TODO: simulate signal strength (and optional packet drop) */
 401
 402         if (data->ps != PS_DISABLED)
 403                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 404
 405         /* Copy skb to all enabled radios that are on the current frequency */
 406         spin_lock(&hwsim_radio_lock);
 407         list_for_each_entry(data2, &hwsim_radios, list) {
 408                 struct sk_buff *nskb;
 409
 410                 if (data == data2)
 411                         continue;
 412
 413                 if (!data2->started || !data2->radio_enabled ||
 414                     !hwsim_ps_rx_ok(data2, skb) ||
 415                     data->channel->center_freq != data2->channel->center_freq)
 416                         continue;
 417
 418                 nskb = skb_copy(skb, GFP_ATOMIC);
 419                 if (nskb == NULL)
 420                         continue;
 421
 422                 if (memcmp(hdr->addr1, data2->hw->wiphy->perm_addr,
 423                            ETH_ALEN) == 0)
 424                         ack = true;
 425                 ieee80211_rx_irqsafe(data2->hw, nskb, &rx_status);
 426         }
 427         spin_unlock(&hwsim_radio_lock);
 428
 429         return ack;
 430 }
 431
 432
 433 static int mac80211_hwsim_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 434 {
 435         struct mac80211_hwsim_data *data = hw->priv;
 436         bool ack;
 437         struct ieee80211_tx_info *txi;
 438
 439         mac80211_hwsim_monitor_rx(hw, skb);
 440
 441         if (skb->len < 10) {
 442                 /* Should not happen; just a sanity check for addr1 use */
 443                 dev_kfree_skb(skb);
 444                 return NETDEV_TX_OK;
 445         }
 446
 447         if (!data->radio_enabled) {
 448                 printk(KERN_DEBUG "%s: dropped TX frame since radio "
 449                        "disabled\n", wiphy_name(hw->wiphy));
 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 || !data->radio_enabled)
 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 radio_enabled=%d beacon_int=%d)\n",
 557                wiphy_name(hw->wiphy), __func__,
 558                conf->channel->center_freq, conf->radio_enabled,
 559                conf->beacon_int);
 560
 561         data->channel = conf->channel;
 562         data->radio_enabled = conf->radio_enabled;
 563         data->beacon_int = 1024 * conf->beacon_int / 1000 * HZ / 1000;
 564         if (data->beacon_int < 1)
 565                 data->beacon_int = 1;
 566
 567         if (!data->started || !data->radio_enabled)
 568                 del_timer(&data->beacon_timer);
 569         else
 570                 mod_timer(&data->beacon_timer, jiffies + data->beacon_int);
 571
 572         return 0;
 573 }
 574
 575
 576 static void mac80211_hwsim_configure_filter(struct ieee80211_hw *hw,
 577                                             unsigned int changed_flags,
 578                                             unsigned int *total_flags,
 579                                             int mc_count,
 580                                             struct dev_addr_list *mc_list)
 581 {
 582         struct mac80211_hwsim_data *data = hw->priv;
 583
 584         printk(KERN_DEBUG "%s:%s\n", wiphy_name(hw->wiphy), __func__);
 585
 586         data->rx_filter = 0;
 587         if (*total_flags & FIF_PROMISC_IN_BSS)
 588                 data->rx_filter |= FIF_PROMISC_IN_BSS;
 589         if (*total_flags & FIF_ALLMULTI)
 590                 data->rx_filter |= FIF_ALLMULTI;
 591
 592         *total_flags = data->rx_filter;
 593 }
 594
 595 static int mac80211_hwsim_config_interface(struct ieee80211_hw *hw,
 596                                            struct ieee80211_vif *vif,
 597                                            struct ieee80211_if_conf *conf)
 598 {
 599         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 600
 601         hwsim_check_magic(vif);
 602         if (conf->changed & IEEE80211_IFCC_BSSID) {
 603                 DECLARE_MAC_BUF(mac);
 604                 printk(KERN_DEBUG "%s:%s: BSSID changed: %pM\n",
 605                        wiphy_name(hw->wiphy), __func__,
 606                        conf->bssid);
 607                 memcpy(vp->bssid, conf->bssid, ETH_ALEN);
 608         }
 609         return 0;
 610 }
 611
 612 static void mac80211_hwsim_bss_info_changed(struct ieee80211_hw *hw,
 613                                             struct ieee80211_vif *vif,
 614                                             struct ieee80211_bss_conf *info,
 615                                             u32 changed)
 616 {
 617         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 618
 619         hwsim_check_magic(vif);
 620
 621         printk(KERN_DEBUG "%s:%s(changed=0x%x)\n",
 622                wiphy_name(hw->wiphy), __func__, changed);
 623
 624         if (changed & BSS_CHANGED_ASSOC) {
 625                 printk(KERN_DEBUG "  %s: ASSOC: assoc=%d aid=%d\n",
 626                        wiphy_name(hw->wiphy), info->assoc, info->aid);
 627                 vp->assoc = info->assoc;
 628                 vp->aid = info->aid;
 629         }
 630
 631         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
 632                 printk(KERN_DEBUG "  %s: ERP_CTS_PROT: %d\n",
 633                        wiphy_name(hw->wiphy), info->use_cts_prot);
 634         }
 635
 636         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
 637                 printk(KERN_DEBUG "  %s: ERP_PREAMBLE: %d\n",
 638                        wiphy_name(hw->wiphy), info->use_short_preamble);
 639         }
 640
 641         if (changed & BSS_CHANGED_ERP_SLOT) {
 642                 printk(KERN_DEBUG "  %s: ERP_SLOT: %d\n",
 643                        wiphy_name(hw->wiphy), info->use_short_slot);
 644         }
 645
 646         if (changed & BSS_CHANGED_HT) {
 647                 printk(KERN_DEBUG "  %s: HT: op_mode=0x%x\n",
 648                        wiphy_name(hw->wiphy),
 649                        info->ht.operation_mode);
 650         }
 651
 652         if (changed & BSS_CHANGED_BASIC_RATES) {
 653                 printk(KERN_DEBUG "  %s: BASIC_RATES: 0x%llx\n",
 654                        wiphy_name(hw->wiphy),
 655                        (unsigned long long) info->basic_rates);
 656         }
 657 }
 658
 659 static void mac80211_hwsim_sta_notify(struct ieee80211_hw *hw,
 660                                       struct ieee80211_vif *vif,
 661                                       enum sta_notify_cmd cmd,
 662                                       struct ieee80211_sta *sta)
 663 {
 664         hwsim_check_magic(vif);
 665         switch (cmd) {
 666         case STA_NOTIFY_ADD:
 667                 hwsim_set_sta_magic(sta);
 668                 break;
 669         case STA_NOTIFY_REMOVE:
 670                 hwsim_clear_sta_magic(sta);
 671                 break;
 672         case STA_NOTIFY_SLEEP:
 673         case STA_NOTIFY_AWAKE:
 674                 /* TODO: make good use of these flags */
 675                 break;
 676         }
 677 }
 678
 679 static int mac80211_hwsim_set_tim(struct ieee80211_hw *hw,
 680                                   struct ieee80211_sta *sta,
 681                                   bool set)
 682 {
 683         hwsim_check_sta_magic(sta);
 684         return 0;
 685 }
 686
 687 static int mac80211_hwsim_conf_tx(
 688         struct ieee80211_hw *hw, u16 queue,
 689         const struct ieee80211_tx_queue_params *params)
 690 {
 691         printk(KERN_DEBUG "%s:%s (queue=%d txop=%d cw_min=%d cw_max=%d "
 692                "aifs=%d)\n",
 693                wiphy_name(hw->wiphy), __func__, queue,
 694                params->txop, params->cw_min, params->cw_max, params->aifs);
 695         return 0;
 696 }
 697
 698 static const struct ieee80211_ops mac80211_hwsim_ops =
 699 {
 700         .tx = mac80211_hwsim_tx,
 701         .start = mac80211_hwsim_start,
 702         .stop = mac80211_hwsim_stop,
 703         .add_interface = mac80211_hwsim_add_interface,
 704         .remove_interface = mac80211_hwsim_remove_interface,
 705         .config = mac80211_hwsim_config,
 706         .configure_filter = mac80211_hwsim_configure_filter,
 707         .config_interface = mac80211_hwsim_config_interface,
 708         .bss_info_changed = mac80211_hwsim_bss_info_changed,
 709         .sta_notify = mac80211_hwsim_sta_notify,
 710         .set_tim = mac80211_hwsim_set_tim,
 711         .conf_tx = mac80211_hwsim_conf_tx,
 712 };
 713
 714
 715 static void mac80211_hwsim_free(void)
 716 {
 717         struct list_head tmplist, *i, *tmp;
 718         struct mac80211_hwsim_data *data;
 719
 720         INIT_LIST_HEAD(&tmplist);
 721
 722         spin_lock_bh(&hwsim_radio_lock);
 723         list_for_each_safe(i, tmp, &hwsim_radios)
 724                 list_move(i, &tmplist);
 725         spin_unlock_bh(&hwsim_radio_lock);
 726
 727         list_for_each_entry(data, &tmplist, list) {
 728                 debugfs_remove(data->debugfs_ps);
 729                 debugfs_remove(data->debugfs);
 730                 ieee80211_unregister_hw(data->hw);
 731                 device_unregister(data->dev);
 732                 ieee80211_free_hw(data->hw);
 733         }
 734         class_destroy(hwsim_class);
 735 }
 736
 737
 738 static struct device_driver mac80211_hwsim_driver = {
 739         .name = "mac80211_hwsim"
 740 };
 741
 742 static const struct net_device_ops hwsim_netdev_ops = {
 743         .ndo_start_xmit         = hwsim_mon_xmit,
 744         .ndo_change_mtu         = eth_change_mtu,
 745         .ndo_set_mac_address    = eth_mac_addr,
 746         .ndo_validate_addr      = eth_validate_addr,
 747 };
 748
 749 static void hwsim_mon_setup(struct net_device *dev)
 750 {
 751         dev->netdev_ops = &hwsim_netdev_ops;
 752         dev->destructor = free_netdev;
 753         ether_setup(dev);
 754         dev->tx_queue_len = 0;
 755         dev->type = ARPHRD_IEEE80211_RADIOTAP;
 756         memset(dev->dev_addr, 0, ETH_ALEN);
 757         dev->dev_addr[0] = 0x12;
 758 }
 759
 760
 761 static void hwsim_send_ps_poll(void *dat, u8 *mac, struct ieee80211_vif *vif)
 762 {
 763         struct mac80211_hwsim_data *data = dat;
 764         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 765         DECLARE_MAC_BUF(buf);
 766         struct sk_buff *skb;
 767         struct ieee80211_pspoll *pspoll;
 768
 769         if (!vp->assoc)
 770                 return;
 771
 772         printk(KERN_DEBUG "%s:%s: send PS-Poll to %pM for aid %d\n",
 773                wiphy_name(data->hw->wiphy), __func__, vp->bssid, vp->aid);
 774
 775         skb = dev_alloc_skb(sizeof(*pspoll));
 776         if (!skb)
 777                 return;
 778         pspoll = (void *) skb_put(skb, sizeof(*pspoll));
 779         pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
 780                                             IEEE80211_STYPE_PSPOLL |
 781                                             IEEE80211_FCTL_PM);
 782         pspoll->aid = cpu_to_le16(0xc000 | vp->aid);
 783         memcpy(pspoll->bssid, vp->bssid, ETH_ALEN);
 784         memcpy(pspoll->ta, mac, ETH_ALEN);
 785         if (data->radio_enabled &&
 786             !mac80211_hwsim_tx_frame(data->hw, skb))
 787                 printk(KERN_DEBUG "%s: PS-Poll frame not ack'ed\n", __func__);
 788         dev_kfree_skb(skb);
 789 }
 790
 791
 792 static void hwsim_send_nullfunc(struct mac80211_hwsim_data *data, u8 *mac,
 793                                 struct ieee80211_vif *vif, int ps)
 794 {
 795         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 796         DECLARE_MAC_BUF(buf);
 797         struct sk_buff *skb;
 798         struct ieee80211_hdr *hdr;
 799
 800         if (!vp->assoc)
 801                 return;
 802
 803         printk(KERN_DEBUG "%s:%s: send data::nullfunc to %pM ps=%d\n",
 804                wiphy_name(data->hw->wiphy), __func__, vp->bssid, ps);
 805
 806         skb = dev_alloc_skb(sizeof(*hdr));
 807         if (!skb)
 808                 return;
 809         hdr = (void *) skb_put(skb, sizeof(*hdr) - ETH_ALEN);
 810         hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
 811                                          IEEE80211_STYPE_NULLFUNC |
 812                                          (ps ? IEEE80211_FCTL_PM : 0));
 813         hdr->duration_id = cpu_to_le16(0);
 814         memcpy(hdr->addr1, vp->bssid, ETH_ALEN);
 815         memcpy(hdr->addr2, mac, ETH_ALEN);
 816         memcpy(hdr->addr3, vp->bssid, ETH_ALEN);
 817         if (data->radio_enabled &&
 818             !mac80211_hwsim_tx_frame(data->hw, skb))
 819                 printk(KERN_DEBUG "%s: nullfunc frame not ack'ed\n", __func__);
 820         dev_kfree_skb(skb);
 821 }
 822
 823
 824 static void hwsim_send_nullfunc_ps(void *dat, u8 *mac,
 825                                    struct ieee80211_vif *vif)
 826 {
 827         struct mac80211_hwsim_data *data = dat;
 828         hwsim_send_nullfunc(data, mac, vif, 1);
 829 }
 830
 831
 832 static void hwsim_send_nullfunc_no_ps(void *dat, u8 *mac,
 833                                       struct ieee80211_vif *vif)
 834 {
 835         struct mac80211_hwsim_data *data = dat;
 836         hwsim_send_nullfunc(data, mac, vif, 0);
 837 }
 838
 839
 840 static int hwsim_fops_ps_read(void *dat, u64 *val)
 841 {
 842         struct mac80211_hwsim_data *data = dat;
 843         *val = data->ps;
 844         return 0;
 845 }
 846
 847 static int hwsim_fops_ps_write(void *dat, u64 val)
 848 {
 849         struct mac80211_hwsim_data *data = dat;
 850         enum ps_mode old_ps;
 851
 852         if (val != PS_DISABLED && val != PS_ENABLED && val != PS_AUTO_POLL &&
 853             val != PS_MANUAL_POLL)
 854                 return -EINVAL;
 855
 856         old_ps = data->ps;
 857         data->ps = val;
 858
 859         if (val == PS_MANUAL_POLL) {
 860                 ieee80211_iterate_active_interfaces(data->hw,
 861                                                     hwsim_send_ps_poll, data);
 862                 data->ps_poll_pending = true;
 863         } else if (old_ps == PS_DISABLED && val != PS_DISABLED) {
 864                 ieee80211_iterate_active_interfaces(data->hw,
 865                                                     hwsim_send_nullfunc_ps,
 866                                                     data);
 867         } else if (old_ps != PS_DISABLED && val == PS_DISABLED) {
 868                 ieee80211_iterate_active_interfaces(data->hw,
 869                                                     hwsim_send_nullfunc_no_ps,
 870                                                     data);
 871         }
 872
 873         return 0;
 874 }
 875
 876 DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_ps, hwsim_fops_ps_read, hwsim_fops_ps_write,
 877                         "%llu\n");
 878
 879
 880 static int __init init_mac80211_hwsim(void)
 881 {
 882         int i, err = 0;
 883         u8 addr[ETH_ALEN];
 884         struct mac80211_hwsim_data *data;
 885         struct ieee80211_hw *hw;
 886         enum ieee80211_band band;
 887
 888         if (radios < 1 || radios > 100)
 889                 return -EINVAL;
 890
 891         spin_lock_init(&hwsim_radio_lock);
 892         INIT_LIST_HEAD(&hwsim_radios);
 893
 894         hwsim_class = class_create(THIS_MODULE, "mac80211_hwsim");
 895         if (IS_ERR(hwsim_class))
 896                 return PTR_ERR(hwsim_class);
 897
 898         memset(addr, 0, ETH_ALEN);
 899         addr[0] = 0x02;
 900
 901         for (i = 0; i < radios; i++) {
 902                 printk(KERN_DEBUG "mac80211_hwsim: Initializing radio %d\n",
 903                        i);
 904                 hw = ieee80211_alloc_hw(sizeof(*data), &mac80211_hwsim_ops);
 905                 if (!hw) {
 906                         printk(KERN_DEBUG "mac80211_hwsim: ieee80211_alloc_hw "
 907                                "failed\n");
 908                         err = -ENOMEM;
 909                         goto failed;
 910                 }
 911                 data = hw->priv;
 912                 data->hw = hw;
 913
 914                 data->dev = device_create(hwsim_class, NULL, 0, hw,
 915                                           "hwsim%d", i);
 916                 if (IS_ERR(data->dev)) {
 917                         printk(KERN_DEBUG
 918                                "mac80211_hwsim: device_create "
 919                                "failed (%ld)\n", PTR_ERR(data->dev));
 920                         err = -ENOMEM;
 921                         goto failed_drvdata;
 922                 }
 923                 data->dev->driver = &mac80211_hwsim_driver;
 924
 925                 SET_IEEE80211_DEV(hw, data->dev);
 926                 addr[3] = i >> 8;
 927                 addr[4] = i;
 928                 SET_IEEE80211_PERM_ADDR(hw, addr);
 929
 930                 hw->channel_change_time = 1;
 931                 hw->queues = 4;
 932                 hw->wiphy->interface_modes =
 933                         BIT(NL80211_IFTYPE_STATION) |
 934                         BIT(NL80211_IFTYPE_AP) |
 935                         BIT(NL80211_IFTYPE_MESH_POINT);
 936
 937                 hw->flags = IEEE80211_HW_MFP_CAPABLE;
 938
 939                 /* ask mac80211 to reserve space for magic */
 940                 hw->vif_data_size = sizeof(struct hwsim_vif_priv);
 941                 hw->sta_data_size = sizeof(struct hwsim_sta_priv);
 942
 943                 memcpy(data->channels_2ghz, hwsim_channels_2ghz,
 944                         sizeof(hwsim_channels_2ghz));
 945                 memcpy(data->channels_5ghz, hwsim_channels_5ghz,
 946                         sizeof(hwsim_channels_5ghz));
 947                 memcpy(data->rates, hwsim_rates, sizeof(hwsim_rates));
 948
 949                 for (band = IEEE80211_BAND_2GHZ; band < IEEE80211_NUM_BANDS; band++) {
 950                         struct ieee80211_supported_band *sband = &data->bands[band];
 951                         switch (band) {
 952                         case IEEE80211_BAND_2GHZ:
 953                                 sband->channels = data->channels_2ghz;
 954                                 sband->n_channels =
 955                                         ARRAY_SIZE(hwsim_channels_2ghz);
 956                                 break;
 957                         case IEEE80211_BAND_5GHZ:
 958                                 sband->channels = data->channels_5ghz;
 959                                 sband->n_channels =
 960                                         ARRAY_SIZE(hwsim_channels_5ghz);
 961                                 break;
 962                         default:
 963                                 break;
 964                         }
 965
 966                         sband->bitrates = data->rates;
 967                         sband->n_bitrates = ARRAY_SIZE(hwsim_rates);
 968
 969                         sband->ht_cap.ht_supported = true;
 970                         sband->ht_cap.cap = IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
 971                                 IEEE80211_HT_CAP_GRN_FLD |
 972                                 IEEE80211_HT_CAP_SGI_40 |
 973                                 IEEE80211_HT_CAP_DSSSCCK40;
 974                         sband->ht_cap.ampdu_factor = 0x3;
 975                         sband->ht_cap.ampdu_density = 0x6;
 976                         memset(&sband->ht_cap.mcs, 0,
 977                                sizeof(sband->ht_cap.mcs));
 978                         sband->ht_cap.mcs.rx_mask[0] = 0xff;
 979                         sband->ht_cap.mcs.rx_mask[1] = 0xff;
 980                         sband->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
 981
 982                         hw->wiphy->bands[band] = sband;
 983                 }
 984
 985                 /* Work to be done prior to ieee80211_register_hw() */
 986                 switch (regtest) {
 987                 case HWSIM_REGTEST_DISABLED:
 988                 case HWSIM_REGTEST_DRIVER_REG_FOLLOW:
 989                 case HWSIM_REGTEST_DRIVER_REG_ALL:
 990                 case HWSIM_REGTEST_DIFF_COUNTRY:
 991                         /*
 992                          * Nothing to be done for driver regulatory domain
 993                          * hints prior to ieee80211_register_hw()
 994                          */
 995                         break;
 996                 case HWSIM_REGTEST_WORLD_ROAM:
 997                         if (i == 0) {
 998                                 hw->wiphy->custom_regulatory = true;
 999                                 wiphy_apply_custom_regulatory(hw->wiphy,
1000                                         &hwsim_world_regdom_custom_01);
1001                         }
1002                         break;
1003                 case HWSIM_REGTEST_CUSTOM_WORLD:
1004                         hw->wiphy->custom_regulatory = true;
1005                         wiphy_apply_custom_regulatory(hw->wiphy,
1006                                 &hwsim_world_regdom_custom_01);
1007                         break;
1008                 case HWSIM_REGTEST_CUSTOM_WORLD_2:
1009                         if (i == 0) {
1010                                 hw->wiphy->custom_regulatory = true;
1011                                 wiphy_apply_custom_regulatory(hw->wiphy,
1012                                         &hwsim_world_regdom_custom_01);
1013                         } else if (i == 1) {
1014                                 hw->wiphy->custom_regulatory = true;
1015                                 wiphy_apply_custom_regulatory(hw->wiphy,
1016                                         &hwsim_world_regdom_custom_02);
1017                         }
1018                         break;
1019                 case HWSIM_REGTEST_STRICT_ALL:
1020                         hw->wiphy->strict_regulatory = true;
1021                         break;
1022                 case HWSIM_REGTEST_STRICT_FOLLOW:
1023                 case HWSIM_REGTEST_STRICT_AND_DRIVER_REG:
1024                         if (i == 0)
1025                                 hw->wiphy->strict_regulatory = true;
1026                         break;
1027                 case HWSIM_REGTEST_ALL:
1028                         if (i == 0) {
1029                                 hw->wiphy->custom_regulatory = true;
1030                                 wiphy_apply_custom_regulatory(hw->wiphy,
1031                                         &hwsim_world_regdom_custom_01);
1032                         } else if (i == 1) {
1033                                 hw->wiphy->custom_regulatory = true;
1034                                 wiphy_apply_custom_regulatory(hw->wiphy,
1035                                         &hwsim_world_regdom_custom_02);
1036                         } else if (i == 4)
1037                                 hw->wiphy->strict_regulatory = true;
1038                         break;
1039                 default:
1040                         break;
1041                 }
1042
1043                 /* give the regulatory workqueue a chance to run */
1044                 if (regtest)
1045                         schedule_timeout_interruptible(1);
1046                 err = ieee80211_register_hw(hw);
1047                 if (err < 0) {
1048                         printk(KERN_DEBUG "mac80211_hwsim: "
1049                                "ieee80211_register_hw failed (%d)\n", err);
1050                         goto failed_hw;
1051                 }
1052
1053                 /* Work to be done after to ieee80211_register_hw() */
1054                 switch (regtest) {
1055                 case HWSIM_REGTEST_WORLD_ROAM:
1056                 case HWSIM_REGTEST_DISABLED:
1057                         break;
1058                 case HWSIM_REGTEST_DRIVER_REG_FOLLOW:
1059                         if (!i)
1060                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
1061                         break;
1062                 case HWSIM_REGTEST_DRIVER_REG_ALL:
1063                 case HWSIM_REGTEST_STRICT_ALL:
1064                         regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
1065                         break;
1066                 case HWSIM_REGTEST_DIFF_COUNTRY:
1067                         if (i < ARRAY_SIZE(hwsim_alpha2s))
1068                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[i]);
1069                         break;
1070                 case HWSIM_REGTEST_CUSTOM_WORLD:
1071                 case HWSIM_REGTEST_CUSTOM_WORLD_2:
1072                         /*
1073                          * Nothing to be done for custom world regulatory
1074                          * domains after to ieee80211_register_hw
1075                          */
1076                         break;
1077                 case HWSIM_REGTEST_STRICT_FOLLOW:
1078                         if (i == 0)
1079                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
1080                         break;
1081                 case HWSIM_REGTEST_STRICT_AND_DRIVER_REG:
1082                         if (i == 0)
1083                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
1084                         else if (i == 1)
1085                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[1]);
1086                         break;
1087                 case HWSIM_REGTEST_ALL:
1088                         if (i == 2)
1089                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
1090                         else if (i == 3)
1091                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[1]);
1092                         else if (i == 4)
1093                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[2]);
1094                         break;
1095                 default:
1096                         break;
1097                 }
1098
1099                 printk(KERN_DEBUG "%s: hwaddr %pM registered\n",
1100                        wiphy_name(hw->wiphy),
1101                        hw->wiphy->perm_addr);
1102
1103                 data->debugfs = debugfs_create_dir("hwsim",
1104                                                    hw->wiphy->debugfsdir);
1105                 data->debugfs_ps = debugfs_create_file("ps", 0666,
1106                                                        data->debugfs, data,
1107                                                        &hwsim_fops_ps);
1108
1109                 setup_timer(&data->beacon_timer, mac80211_hwsim_beacon,
1110                             (unsigned long) hw);
1111
1112                 list_add_tail(&data->list, &hwsim_radios);
1113         }
1114
1115         hwsim_mon = alloc_netdev(0, "hwsim%d", hwsim_mon_setup);
1116         if (hwsim_mon == NULL)
1117                 goto failed;
1118
1119         rtnl_lock();
1120
1121         err = dev_alloc_name(hwsim_mon, hwsim_mon->name);
1122         if (err < 0)
1123                 goto failed_mon;
1124
1125
1126         err = register_netdevice(hwsim_mon);
1127         if (err < 0)
1128                 goto failed_mon;
1129
1130         rtnl_unlock();
1131
1132         return 0;
1133
1134 failed_mon:
1135         rtnl_unlock();
1136         free_netdev(hwsim_mon);
1137         mac80211_hwsim_free();
1138         return err;
1139
1140 failed_hw:
1141         device_unregister(data->dev);
1142 failed_drvdata:
1143         ieee80211_free_hw(hw);
1144 failed:
1145         mac80211_hwsim_free();
1146         return err;
1147 }
1148
1149
1150 static void __exit exit_mac80211_hwsim(void)
1151 {
1152         printk(KERN_DEBUG "mac80211_hwsim: unregister radios\n");
1153
1154         unregister_netdev(hwsim_mon);
1155         mac80211_hwsim_free();
1156 }
1157
1158
1159 module_init(init_mac80211_hwsim);
1160 module_exit(exit_mac80211_hwsim);