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  * Copyright (c) 2011, Javier Lopez <jlopex@gmail.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 /*
  12  * TODO:
  13  * - Add TSF sync and fix IBSS beacon transmission by adding
  14  *   competition for "air time" at TBTT
  15  * - RX filtering based on filter configuration (data->rx_filter)
  16  */
  17
  18 #include <linux/list.h>
  19 #include <linux/slab.h>
  20 #include <linux/spinlock.h>
  21 #include <net/dst.h>
  22 #include <net/xfrm.h>
  23 #include <net/mac80211.h>
  24 #include <net/ieee80211_radiotap.h>
  25 #include <linux/if_arp.h>
  26 #include <linux/rtnetlink.h>
  27 #include <linux/etherdevice.h>
  28 #include <linux/debugfs.h>
  29 #include <linux/module.h>
  30 #include <linux/ktime.h>
  31 #include <net/genetlink.h>
  32 #include "mac80211_hwsim.h"
  33
  34 #define WARN_QUEUE 100
  35 #define MAX_QUEUE 200
  36
  37 MODULE_AUTHOR("Jouni Malinen");
  38 MODULE_DESCRIPTION("Software simulator of 802.11 radio(s) for mac80211");
  39 MODULE_LICENSE("GPL");
  40
  41 static u32 wmediumd_pid;
  42
  43 static int radios = 2;
  44 module_param(radios, int, 0444);
  45 MODULE_PARM_DESC(radios, "Number of simulated radios");
  46
  47 static bool fake_hw_scan;
  48 module_param(fake_hw_scan, bool, 0444);
  49 MODULE_PARM_DESC(fake_hw_scan, "Install fake (no-op) hw-scan handler");
  50
  51 /**
  52  * enum hwsim_regtest - the type of regulatory tests we offer
  53  *
  54  * These are the different values you can use for the regtest
  55  * module parameter. This is useful to help test world roaming
  56  * and the driver regulatory_hint() call and combinations of these.
  57  * If you want to do specific alpha2 regulatory domain tests simply
  58  * use the userspace regulatory request as that will be respected as
  59  * well without the need of this module parameter. This is designed
  60  * only for testing the driver regulatory request, world roaming
  61  * and all possible combinations.
  62  *
  63  * @HWSIM_REGTEST_DISABLED: No regulatory tests are performed,
  64  *      this is the default value.
  65  * @HWSIM_REGTEST_DRIVER_REG_FOLLOW: Used for testing the driver regulatory
  66  *      hint, only one driver regulatory hint will be sent as such the
  67  *      secondary radios are expected to follow.
  68  * @HWSIM_REGTEST_DRIVER_REG_ALL: Used for testing the driver regulatory
  69  *      request with all radios reporting the same regulatory domain.
  70  * @HWSIM_REGTEST_DIFF_COUNTRY: Used for testing the drivers calling
  71  *      different regulatory domains requests. Expected behaviour is for
  72  *      an intersection to occur but each device will still use their
  73  *      respective regulatory requested domains. Subsequent radios will
  74  *      use the resulting intersection.
  75  * @HWSIM_REGTEST_WORLD_ROAM: Used for testing the world roaming. We accomplish
  76  *      this by using a custom beacon-capable regulatory domain for the first
  77  *      radio. All other device world roam.
  78  * @HWSIM_REGTEST_CUSTOM_WORLD: Used for testing the custom world regulatory
  79  *      domain requests. All radios will adhere to this custom world regulatory
  80  *      domain.
  81  * @HWSIM_REGTEST_CUSTOM_WORLD_2: Used for testing 2 custom world regulatory
  82  *      domain requests. The first radio will adhere to the first custom world
  83  *      regulatory domain, the second one to the second custom world regulatory
  84  *      domain. All other devices will world roam.
  85  * @HWSIM_REGTEST_STRICT_FOLLOW_: Used for testing strict regulatory domain
  86  *      settings, only the first radio will send a regulatory domain request
  87  *      and use strict settings. The rest of the radios are expected to follow.
  88  * @HWSIM_REGTEST_STRICT_ALL: Used for testing strict regulatory domain
  89  *      settings. All radios will adhere to this.
  90  * @HWSIM_REGTEST_STRICT_AND_DRIVER_REG: Used for testing strict regulatory
  91  *      domain settings, combined with secondary driver regulatory domain
  92  *      settings. The first radio will get a strict regulatory domain setting
  93  *      using the first driver regulatory request and the second radio will use
  94  *      non-strict settings using the second driver regulatory request. All
  95  *      other devices should follow the intersection created between the
  96  *      first two.
  97  * @HWSIM_REGTEST_ALL: Used for testing every possible mix. You will need
  98  *      at least 6 radios for a complete test. We will test in this order:
  99  *      1 - driver custom world regulatory domain
 100  *      2 - second custom world regulatory domain
 101  *      3 - first driver regulatory domain request
 102  *      4 - second driver regulatory domain request
 103  *      5 - strict regulatory domain settings using the third driver regulatory
 104  *          domain request
 105  *      6 and on - should follow the intersection of the 3rd, 4rth and 5th radio
 106  *                 regulatory requests.
 107  */
 108 enum hwsim_regtest {
 109         HWSIM_REGTEST_DISABLED = 0,
 110         HWSIM_REGTEST_DRIVER_REG_FOLLOW = 1,
 111         HWSIM_REGTEST_DRIVER_REG_ALL = 2,
 112         HWSIM_REGTEST_DIFF_COUNTRY = 3,
 113         HWSIM_REGTEST_WORLD_ROAM = 4,
 114         HWSIM_REGTEST_CUSTOM_WORLD = 5,
 115         HWSIM_REGTEST_CUSTOM_WORLD_2 = 6,
 116         HWSIM_REGTEST_STRICT_FOLLOW = 7,
 117         HWSIM_REGTEST_STRICT_ALL = 8,
 118         HWSIM_REGTEST_STRICT_AND_DRIVER_REG = 9,
 119         HWSIM_REGTEST_ALL = 10,
 120 };
 121
 122 /* Set to one of the HWSIM_REGTEST_* values above */
 123 static int regtest = HWSIM_REGTEST_DISABLED;
 124 module_param(regtest, int, 0444);
 125 MODULE_PARM_DESC(regtest, "The type of regulatory test we want to run");
 126
 127 static const char *hwsim_alpha2s[] = {
 128         "FI",
 129         "AL",
 130         "US",
 131         "DE",
 132         "JP",
 133         "AL",
 134 };
 135
 136 static const struct ieee80211_regdomain hwsim_world_regdom_custom_01 = {
 137         .n_reg_rules = 4,
 138         .alpha2 =  "99",
 139         .reg_rules = {
 140                 REG_RULE(2412-10, 2462+10, 40, 0, 20, 0),
 141                 REG_RULE(2484-10, 2484+10, 40, 0, 20, 0),
 142                 REG_RULE(5150-10, 5240+10, 40, 0, 30, 0),
 143                 REG_RULE(5745-10, 5825+10, 40, 0, 30, 0),
 144         }
 145 };
 146
 147 static const struct ieee80211_regdomain hwsim_world_regdom_custom_02 = {
 148         .n_reg_rules = 2,
 149         .alpha2 =  "99",
 150         .reg_rules = {
 151                 REG_RULE(2412-10, 2462+10, 40, 0, 20, 0),
 152                 REG_RULE(5725-10, 5850+10, 40, 0, 30,
 153                         NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS),
 154         }
 155 };
 156
 157 struct hwsim_vif_priv {
 158         u32 magic;
 159         u8 bssid[ETH_ALEN];
 160         bool assoc;
 161         u16 aid;
 162 };
 163
 164 #define HWSIM_VIF_MAGIC 0x69537748
 165
 166 static inline void hwsim_check_magic(struct ieee80211_vif *vif)
 167 {
 168         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 169         WARN_ON(vp->magic != HWSIM_VIF_MAGIC);
 170 }
 171
 172 static inline void hwsim_set_magic(struct ieee80211_vif *vif)
 173 {
 174         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 175         vp->magic = HWSIM_VIF_MAGIC;
 176 }
 177
 178 static inline void hwsim_clear_magic(struct ieee80211_vif *vif)
 179 {
 180         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 181         vp->magic = 0;
 182 }
 183
 184 struct hwsim_sta_priv {
 185         u32 magic;
 186 };
 187
 188 #define HWSIM_STA_MAGIC 0x6d537748
 189
 190 static inline void hwsim_check_sta_magic(struct ieee80211_sta *sta)
 191 {
 192         struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
 193         WARN_ON(sp->magic != HWSIM_STA_MAGIC);
 194 }
 195
 196 static inline void hwsim_set_sta_magic(struct ieee80211_sta *sta)
 197 {
 198         struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
 199         sp->magic = HWSIM_STA_MAGIC;
 200 }
 201
 202 static inline void hwsim_clear_sta_magic(struct ieee80211_sta *sta)
 203 {
 204         struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
 205         sp->magic = 0;
 206 }
 207
 208 static struct class *hwsim_class;
 209
 210 static struct net_device *hwsim_mon; /* global monitor netdev */
 211
 212 #define CHAN2G(_freq)  { \
 213         .band = IEEE80211_BAND_2GHZ, \
 214         .center_freq = (_freq), \
 215         .hw_value = (_freq), \
 216         .max_power = 20, \
 217 }
 218
 219 #define CHAN5G(_freq) { \
 220         .band = IEEE80211_BAND_5GHZ, \
 221         .center_freq = (_freq), \
 222         .hw_value = (_freq), \
 223         .max_power = 20, \
 224 }
 225
 226 static const struct ieee80211_channel hwsim_channels_2ghz[] = {
 227         CHAN2G(2412), /* Channel 1 */
 228         CHAN2G(2417), /* Channel 2 */
 229         CHAN2G(2422), /* Channel 3 */
 230         CHAN2G(2427), /* Channel 4 */
 231         CHAN2G(2432), /* Channel 5 */
 232         CHAN2G(2437), /* Channel 6 */
 233         CHAN2G(2442), /* Channel 7 */
 234         CHAN2G(2447), /* Channel 8 */
 235         CHAN2G(2452), /* Channel 9 */
 236         CHAN2G(2457), /* Channel 10 */
 237         CHAN2G(2462), /* Channel 11 */
 238         CHAN2G(2467), /* Channel 12 */
 239         CHAN2G(2472), /* Channel 13 */
 240         CHAN2G(2484), /* Channel 14 */
 241 };
 242
 243 static const struct ieee80211_channel hwsim_channels_5ghz[] = {
 244         CHAN5G(5180), /* Channel 36 */
 245         CHAN5G(5200), /* Channel 40 */
 246         CHAN5G(5220), /* Channel 44 */
 247         CHAN5G(5240), /* Channel 48 */
 248
 249         CHAN5G(5260), /* Channel 52 */
 250         CHAN5G(5280), /* Channel 56 */
 251         CHAN5G(5300), /* Channel 60 */
 252         CHAN5G(5320), /* Channel 64 */
 253
 254         CHAN5G(5500), /* Channel 100 */
 255         CHAN5G(5520), /* Channel 104 */
 256         CHAN5G(5540), /* Channel 108 */
 257         CHAN5G(5560), /* Channel 112 */
 258         CHAN5G(5580), /* Channel 116 */
 259         CHAN5G(5600), /* Channel 120 */
 260         CHAN5G(5620), /* Channel 124 */
 261         CHAN5G(5640), /* Channel 128 */
 262         CHAN5G(5660), /* Channel 132 */
 263         CHAN5G(5680), /* Channel 136 */
 264         CHAN5G(5700), /* Channel 140 */
 265
 266         CHAN5G(5745), /* Channel 149 */
 267         CHAN5G(5765), /* Channel 153 */
 268         CHAN5G(5785), /* Channel 157 */
 269         CHAN5G(5805), /* Channel 161 */
 270         CHAN5G(5825), /* Channel 165 */
 271 };
 272
 273 static const struct ieee80211_rate hwsim_rates[] = {
 274         { .bitrate = 10 },
 275         { .bitrate = 20, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
 276         { .bitrate = 55, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
 277         { .bitrate = 110, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
 278         { .bitrate = 60 },
 279         { .bitrate = 90 },
 280         { .bitrate = 120 },
 281         { .bitrate = 180 },
 282         { .bitrate = 240 },
 283         { .bitrate = 360 },
 284         { .bitrate = 480 },
 285         { .bitrate = 540 }
 286 };
 287
 288 static spinlock_t hwsim_radio_lock;
 289 static struct list_head hwsim_radios;
 290
 291 struct mac80211_hwsim_data {
 292         struct list_head list;
 293         struct ieee80211_hw *hw;
 294         struct device *dev;
 295         struct ieee80211_supported_band bands[2];
 296         struct ieee80211_channel channels_2ghz[ARRAY_SIZE(hwsim_channels_2ghz)];
 297         struct ieee80211_channel channels_5ghz[ARRAY_SIZE(hwsim_channels_5ghz)];
 298         struct ieee80211_rate rates[ARRAY_SIZE(hwsim_rates)];
 299
 300         struct mac_address addresses[2];
 301
 302         struct ieee80211_channel *channel;
 303         unsigned long beacon_int; /* in jiffies unit */
 304         unsigned int rx_filter;
 305         bool started, idle, scanning;
 306         struct mutex mutex;
 307         struct timer_list beacon_timer;
 308         enum ps_mode {
 309                 PS_DISABLED, PS_ENABLED, PS_AUTO_POLL, PS_MANUAL_POLL
 310         } ps;
 311         bool ps_poll_pending;
 312         struct dentry *debugfs;
 313         struct dentry *debugfs_ps;
 314
 315         struct sk_buff_head pending;    /* packets pending */
 316         /*
 317          * Only radios in the same group can communicate together (the
 318          * channel has to match too). Each bit represents a group. A
 319          * radio can be in more then one group.
 320          */
 321         u64 group;
 322         struct dentry *debugfs_group;
 323
 324         int power_level;
 325
 326         /* difference between this hw's clock and the real clock, in usecs */
 327         u64 tsf_offset;
 328 };
 329
 330
 331 struct hwsim_radiotap_hdr {
 332         struct ieee80211_radiotap_header hdr;
 333         __le64 rt_tsft;
 334         u8 rt_flags;
 335         u8 rt_rate;
 336         __le16 rt_channel;
 337         __le16 rt_chbitmask;
 338 } __packed;
 339
 340 /* MAC80211_HWSIM netlinf family */
 341 static struct genl_family hwsim_genl_family = {
 342         .id = GENL_ID_GENERATE,
 343         .hdrsize = 0,
 344         .name = "MAC80211_HWSIM",
 345         .version = 1,
 346         .maxattr = HWSIM_ATTR_MAX,
 347 };
 348
 349 /* MAC80211_HWSIM netlink policy */
 350
 351 static struct nla_policy hwsim_genl_policy[HWSIM_ATTR_MAX + 1] = {
 352         [HWSIM_ATTR_ADDR_RECEIVER] = { .type = NLA_UNSPEC,
 353                                        .len = 6*sizeof(u8) },
 354         [HWSIM_ATTR_ADDR_TRANSMITTER] = { .type = NLA_UNSPEC,
 355                                           .len = 6*sizeof(u8) },
 356         [HWSIM_ATTR_FRAME] = { .type = NLA_BINARY,
 357                                .len = IEEE80211_MAX_DATA_LEN },
 358         [HWSIM_ATTR_FLAGS] = { .type = NLA_U32 },
 359         [HWSIM_ATTR_RX_RATE] = { .type = NLA_U32 },
 360         [HWSIM_ATTR_SIGNAL] = { .type = NLA_U32 },
 361         [HWSIM_ATTR_TX_INFO] = { .type = NLA_UNSPEC,
 362                                  .len = IEEE80211_TX_MAX_RATES*sizeof(
 363                                         struct hwsim_tx_rate)},
 364         [HWSIM_ATTR_COOKIE] = { .type = NLA_U64 },
 365 };
 366
 367 static netdev_tx_t hwsim_mon_xmit(struct sk_buff *skb,
 368                                         struct net_device *dev)
 369 {
 370         /* TODO: allow packet injection */
 371         dev_kfree_skb(skb);
 372         return NETDEV_TX_OK;
 373 }
 374
 375 static __le64 __mac80211_hwsim_get_tsf(struct mac80211_hwsim_data *data)
 376 {
 377         struct timeval tv = ktime_to_timeval(ktime_get_real());
 378         u64 now = tv.tv_sec * USEC_PER_SEC + tv.tv_usec;
 379         return cpu_to_le64(now + data->tsf_offset);
 380 }
 381
 382 static u64 mac80211_hwsim_get_tsf(struct ieee80211_hw *hw,
 383                 struct ieee80211_vif *vif)
 384 {
 385         struct mac80211_hwsim_data *data = hw->priv;
 386         return le64_to_cpu(__mac80211_hwsim_get_tsf(data));
 387 }
 388
 389 static void mac80211_hwsim_set_tsf(struct ieee80211_hw *hw,
 390                 struct ieee80211_vif *vif, u64 tsf)
 391 {
 392         struct mac80211_hwsim_data *data = hw->priv;
 393         struct timeval tv = ktime_to_timeval(ktime_get_real());
 394         u64 now = tv.tv_sec * USEC_PER_SEC + tv.tv_usec;
 395         data->tsf_offset = tsf - now;
 396 }
 397
 398 static void mac80211_hwsim_monitor_rx(struct ieee80211_hw *hw,
 399                                       struct sk_buff *tx_skb)
 400 {
 401         struct mac80211_hwsim_data *data = hw->priv;
 402         struct sk_buff *skb;
 403         struct hwsim_radiotap_hdr *hdr;
 404         u16 flags;
 405         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_skb);
 406         struct ieee80211_rate *txrate = ieee80211_get_tx_rate(hw, info);
 407
 408         if (!netif_running(hwsim_mon))
 409                 return;
 410
 411         skb = skb_copy_expand(tx_skb, sizeof(*hdr), 0, GFP_ATOMIC);
 412         if (skb == NULL)
 413                 return;
 414
 415         hdr = (struct hwsim_radiotap_hdr *) skb_push(skb, sizeof(*hdr));
 416         hdr->hdr.it_version = PKTHDR_RADIOTAP_VERSION;
 417         hdr->hdr.it_pad = 0;
 418         hdr->hdr.it_len = cpu_to_le16(sizeof(*hdr));
 419         hdr->hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
 420                                           (1 << IEEE80211_RADIOTAP_RATE) |
 421                                           (1 << IEEE80211_RADIOTAP_TSFT) |
 422                                           (1 << IEEE80211_RADIOTAP_CHANNEL));
 423         hdr->rt_tsft = __mac80211_hwsim_get_tsf(data);
 424         hdr->rt_flags = 0;
 425         hdr->rt_rate = txrate->bitrate / 5;
 426         hdr->rt_channel = cpu_to_le16(data->channel->center_freq);
 427         flags = IEEE80211_CHAN_2GHZ;
 428         if (txrate->flags & IEEE80211_RATE_ERP_G)
 429                 flags |= IEEE80211_CHAN_OFDM;
 430         else
 431                 flags |= IEEE80211_CHAN_CCK;
 432         hdr->rt_chbitmask = cpu_to_le16(flags);
 433
 434         skb->dev = hwsim_mon;
 435         skb_set_mac_header(skb, 0);
 436         skb->ip_summed = CHECKSUM_UNNECESSARY;
 437         skb->pkt_type = PACKET_OTHERHOST;
 438         skb->protocol = htons(ETH_P_802_2);
 439         memset(skb->cb, 0, sizeof(skb->cb));
 440         netif_rx(skb);
 441 }
 442
 443
 444 static void mac80211_hwsim_monitor_ack(struct ieee80211_hw *hw, const u8 *addr)
 445 {
 446         struct mac80211_hwsim_data *data = hw->priv;
 447         struct sk_buff *skb;
 448         struct hwsim_radiotap_hdr *hdr;
 449         u16 flags;
 450         struct ieee80211_hdr *hdr11;
 451
 452         if (!netif_running(hwsim_mon))
 453                 return;
 454
 455         skb = dev_alloc_skb(100);
 456         if (skb == NULL)
 457                 return;
 458
 459         hdr = (struct hwsim_radiotap_hdr *) skb_put(skb, sizeof(*hdr));
 460         hdr->hdr.it_version = PKTHDR_RADIOTAP_VERSION;
 461         hdr->hdr.it_pad = 0;
 462         hdr->hdr.it_len = cpu_to_le16(sizeof(*hdr));
 463         hdr->hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
 464                                           (1 << IEEE80211_RADIOTAP_CHANNEL));
 465         hdr->rt_flags = 0;
 466         hdr->rt_rate = 0;
 467         hdr->rt_channel = cpu_to_le16(data->channel->center_freq);
 468         flags = IEEE80211_CHAN_2GHZ;
 469         hdr->rt_chbitmask = cpu_to_le16(flags);
 470
 471         hdr11 = (struct ieee80211_hdr *) skb_put(skb, 10);
 472         hdr11->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
 473                                            IEEE80211_STYPE_ACK);
 474         hdr11->duration_id = cpu_to_le16(0);
 475         memcpy(hdr11->addr1, addr, ETH_ALEN);
 476
 477         skb->dev = hwsim_mon;
 478         skb_set_mac_header(skb, 0);
 479         skb->ip_summed = CHECKSUM_UNNECESSARY;
 480         skb->pkt_type = PACKET_OTHERHOST;
 481         skb->protocol = htons(ETH_P_802_2);
 482         memset(skb->cb, 0, sizeof(skb->cb));
 483         netif_rx(skb);
 484 }
 485
 486
 487 static bool hwsim_ps_rx_ok(struct mac80211_hwsim_data *data,
 488                            struct sk_buff *skb)
 489 {
 490         switch (data->ps) {
 491         case PS_DISABLED:
 492                 return true;
 493         case PS_ENABLED:
 494                 return false;
 495         case PS_AUTO_POLL:
 496                 /* TODO: accept (some) Beacons by default and other frames only
 497                  * if pending PS-Poll has been sent */
 498                 return true;
 499         case PS_MANUAL_POLL:
 500                 /* Allow unicast frames to own address if there is a pending
 501                  * PS-Poll */
 502                 if (data->ps_poll_pending &&
 503                     memcmp(data->hw->wiphy->perm_addr, skb->data + 4,
 504                            ETH_ALEN) == 0) {
 505                         data->ps_poll_pending = false;
 506                         return true;
 507                 }
 508                 return false;
 509         }
 510
 511         return true;
 512 }
 513
 514
 515 struct mac80211_hwsim_addr_match_data {
 516         bool ret;
 517         const u8 *addr;
 518 };
 519
 520 static void mac80211_hwsim_addr_iter(void *data, u8 *mac,
 521                                      struct ieee80211_vif *vif)
 522 {
 523         struct mac80211_hwsim_addr_match_data *md = data;
 524         if (memcmp(mac, md->addr, ETH_ALEN) == 0)
 525                 md->ret = true;
 526 }
 527
 528
 529 static bool mac80211_hwsim_addr_match(struct mac80211_hwsim_data *data,
 530                                       const u8 *addr)
 531 {
 532         struct mac80211_hwsim_addr_match_data md;
 533
 534         if (memcmp(addr, data->hw->wiphy->perm_addr, ETH_ALEN) == 0)
 535                 return true;
 536
 537         md.ret = false;
 538         md.addr = addr;
 539         ieee80211_iterate_active_interfaces_atomic(data->hw,
 540                                                    mac80211_hwsim_addr_iter,
 541                                                    &md);
 542
 543         return md.ret;
 544 }
 545
 546 static void mac80211_hwsim_tx_frame_nl(struct ieee80211_hw *hw,
 547                                        struct sk_buff *my_skb,
 548                                        int dst_pid)
 549 {
 550         struct sk_buff *skb;
 551         struct mac80211_hwsim_data *data = hw->priv;
 552         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) my_skb->data;
 553         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(my_skb);
 554         void *msg_head;
 555         unsigned int hwsim_flags = 0;
 556         int i;
 557         struct hwsim_tx_rate tx_attempts[IEEE80211_TX_MAX_RATES];
 558
 559         if (data->idle) {
 560                 wiphy_debug(hw->wiphy, "Trying to TX when idle - reject\n");
 561                 dev_kfree_skb(my_skb);
 562                 return;
 563         }
 564
 565         if (data->ps != PS_DISABLED)
 566                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 567         /* If the queue contains MAX_QUEUE skb's drop some */
 568         if (skb_queue_len(&data->pending) >= MAX_QUEUE) {
 569                 /* Droping until WARN_QUEUE level */
 570                 while (skb_queue_len(&data->pending) >= WARN_QUEUE)
 571                         skb_dequeue(&data->pending);
 572         }
 573
 574         skb = genlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
 575         if (skb == NULL)
 576                 goto nla_put_failure;
 577
 578         msg_head = genlmsg_put(skb, 0, 0, &hwsim_genl_family, 0,
 579                                HWSIM_CMD_FRAME);
 580         if (msg_head == NULL) {
 581                 printk(KERN_DEBUG "mac80211_hwsim: problem with msg_head\n");
 582                 goto nla_put_failure;
 583         }
 584
 585         if (nla_put(skb, HWSIM_ATTR_ADDR_TRANSMITTER,
 586                     sizeof(struct mac_address), data->addresses[1].addr))
 587                 goto nla_put_failure;
 588
 589         /* We get the skb->data */
 590         if (nla_put(skb, HWSIM_ATTR_FRAME, my_skb->len, my_skb->data))
 591                 goto nla_put_failure;
 592
 593         /* We get the flags for this transmission, and we translate them to
 594            wmediumd flags  */
 595
 596         if (info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS)
 597                 hwsim_flags |= HWSIM_TX_CTL_REQ_TX_STATUS;
 598
 599         if (info->flags & IEEE80211_TX_CTL_NO_ACK)
 600                 hwsim_flags |= HWSIM_TX_CTL_NO_ACK;
 601
 602         if (nla_put_u32(skb, HWSIM_ATTR_FLAGS, hwsim_flags))
 603                 goto nla_put_failure;
 604
 605         /* We get the tx control (rate and retries) info*/
 606
 607         for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
 608                 tx_attempts[i].idx = info->status.rates[i].idx;
 609                 tx_attempts[i].count = info->status.rates[i].count;
 610         }
 611
 612         if (nla_put(skb, HWSIM_ATTR_TX_INFO,
 613                     sizeof(struct hwsim_tx_rate)*IEEE80211_TX_MAX_RATES,
 614                     tx_attempts))
 615                 goto nla_put_failure;
 616
 617         /* We create a cookie to identify this skb */
 618         if (nla_put_u64(skb, HWSIM_ATTR_COOKIE, (unsigned long) my_skb))
 619                 goto nla_put_failure;
 620
 621         genlmsg_end(skb, msg_head);
 622         genlmsg_unicast(&init_net, skb, dst_pid);
 623
 624         /* Enqueue the packet */
 625         skb_queue_tail(&data->pending, my_skb);
 626         return;
 627
 628 nla_put_failure:
 629         printk(KERN_DEBUG "mac80211_hwsim: error occurred in %s\n", __func__);
 630 }
 631
 632 static bool mac80211_hwsim_tx_frame_no_nl(struct ieee80211_hw *hw,
 633                                           struct sk_buff *skb)
 634 {
 635         struct mac80211_hwsim_data *data = hw->priv, *data2;
 636         bool ack = false;
 637         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 638         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 639         struct ieee80211_rx_status rx_status;
 640         struct ieee80211_rate *txrate = ieee80211_get_tx_rate(hw, info);
 641
 642         if (data->idle) {
 643                 wiphy_debug(hw->wiphy, "Trying to TX when idle - reject\n");
 644                 return false;
 645         }
 646
 647         memset(&rx_status, 0, sizeof(rx_status));
 648         rx_status.flag |= RX_FLAG_MACTIME_MPDU;
 649         rx_status.freq = data->channel->center_freq;
 650         rx_status.band = data->channel->band;
 651         rx_status.rate_idx = info->control.rates[0].idx;
 652         if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS)
 653                 rx_status.flag |= RX_FLAG_HT;
 654         if (info->control.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
 655                 rx_status.flag |= RX_FLAG_40MHZ;
 656         if (info->control.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
 657                 rx_status.flag |= RX_FLAG_SHORT_GI;
 658         /* TODO: simulate real signal strength (and optional packet loss) */
 659         rx_status.signal = data->power_level - 50;
 660
 661         if (data->ps != PS_DISABLED)
 662                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 663
 664         /* release the skb's source info */
 665         skb_orphan(skb);
 666         skb_dst_drop(skb);
 667         skb->mark = 0;
 668         secpath_reset(skb);
 669         nf_reset(skb);
 670
 671         /* Copy skb to all enabled radios that are on the current frequency */
 672         spin_lock(&hwsim_radio_lock);
 673         list_for_each_entry(data2, &hwsim_radios, list) {
 674                 struct sk_buff *nskb;
 675                 struct ieee80211_mgmt *mgmt;
 676
 677                 if (data == data2)
 678                         continue;
 679
 680                 if (data2->idle || !data2->started ||
 681                     !hwsim_ps_rx_ok(data2, skb) || !data2->channel ||
 682                     data->channel->center_freq != data2->channel->center_freq ||
 683                     !(data->group & data2->group))
 684                         continue;
 685
 686                 nskb = skb_copy(skb, GFP_ATOMIC);
 687                 if (nskb == NULL)
 688                         continue;
 689
 690                 if (mac80211_hwsim_addr_match(data2, hdr->addr1))
 691                         ack = true;
 692
 693                 /* set bcn timestamp relative to receiver mactime */
 694                 rx_status.mactime =
 695                                 le64_to_cpu(__mac80211_hwsim_get_tsf(data2));
 696                 mgmt = (struct ieee80211_mgmt *) nskb->data;
 697                 if (ieee80211_is_beacon(mgmt->frame_control) ||
 698                     ieee80211_is_probe_resp(mgmt->frame_control))
 699                         mgmt->u.beacon.timestamp = cpu_to_le64(
 700                                 rx_status.mactime +
 701                                 (data->tsf_offset - data2->tsf_offset) +
 702                                 24 * 8 * 10 / txrate->bitrate);
 703
 704                 memcpy(IEEE80211_SKB_RXCB(nskb), &rx_status, sizeof(rx_status));
 705                 ieee80211_rx_irqsafe(data2->hw, nskb);
 706         }
 707         spin_unlock(&hwsim_radio_lock);
 708
 709         return ack;
 710 }
 711
 712 static void mac80211_hwsim_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 713 {
 714         bool ack;
 715         struct ieee80211_tx_info *txi;
 716         u32 _pid;
 717
 718         mac80211_hwsim_monitor_rx(hw, skb);
 719
 720         if (skb->len < 10) {
 721                 /* Should not happen; just a sanity check for addr1 use */
 722                 dev_kfree_skb(skb);
 723                 return;
 724         }
 725
 726         /* wmediumd mode check */
 727         _pid = ACCESS_ONCE(wmediumd_pid);
 728
 729         if (_pid)
 730                 return mac80211_hwsim_tx_frame_nl(hw, skb, _pid);
 731
 732         /* NO wmediumd detected, perfect medium simulation */
 733         ack = mac80211_hwsim_tx_frame_no_nl(hw, skb);
 734
 735         if (ack && skb->len >= 16) {
 736                 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 737                 mac80211_hwsim_monitor_ack(hw, hdr->addr2);
 738         }
 739
 740         txi = IEEE80211_SKB_CB(skb);
 741
 742         if (txi->control.vif)
 743                 hwsim_check_magic(txi->control.vif);
 744         if (txi->control.sta)
 745                 hwsim_check_sta_magic(txi->control.sta);
 746
 747         ieee80211_tx_info_clear_status(txi);
 748
 749         /* frame was transmitted at most favorable rate at first attempt */
 750         txi->control.rates[0].count = 1;
 751         txi->control.rates[1].idx = -1;
 752
 753         if (!(txi->flags & IEEE80211_TX_CTL_NO_ACK) && ack)
 754                 txi->flags |= IEEE80211_TX_STAT_ACK;
 755         ieee80211_tx_status_irqsafe(hw, skb);
 756 }
 757
 758
 759 static int mac80211_hwsim_start(struct ieee80211_hw *hw)
 760 {
 761         struct mac80211_hwsim_data *data = hw->priv;
 762         wiphy_debug(hw->wiphy, "%s\n", __func__);
 763         data->started = true;
 764         return 0;
 765 }
 766
 767
 768 static void mac80211_hwsim_stop(struct ieee80211_hw *hw)
 769 {
 770         struct mac80211_hwsim_data *data = hw->priv;
 771         data->started = false;
 772         del_timer(&data->beacon_timer);
 773         wiphy_debug(hw->wiphy, "%s\n", __func__);
 774 }
 775
 776
 777 static int mac80211_hwsim_add_interface(struct ieee80211_hw *hw,
 778                                         struct ieee80211_vif *vif)
 779 {
 780         wiphy_debug(hw->wiphy, "%s (type=%d mac_addr=%pM)\n",
 781                     __func__, ieee80211_vif_type_p2p(vif),
 782                     vif->addr);
 783         hwsim_set_magic(vif);
 784         return 0;
 785 }
 786
 787
 788 static int mac80211_hwsim_change_interface(struct ieee80211_hw *hw,
 789                                            struct ieee80211_vif *vif,
 790                                            enum nl80211_iftype newtype,
 791                                            bool newp2p)
 792 {
 793         newtype = ieee80211_iftype_p2p(newtype, newp2p);
 794         wiphy_debug(hw->wiphy,
 795                     "%s (old type=%d, new type=%d, mac_addr=%pM)\n",
 796                     __func__, ieee80211_vif_type_p2p(vif),
 797                     newtype, vif->addr);
 798         hwsim_check_magic(vif);
 799
 800         return 0;
 801 }
 802
 803 static void mac80211_hwsim_remove_interface(
 804         struct ieee80211_hw *hw, struct ieee80211_vif *vif)
 805 {
 806         wiphy_debug(hw->wiphy, "%s (type=%d mac_addr=%pM)\n",
 807                     __func__, ieee80211_vif_type_p2p(vif),
 808                     vif->addr);
 809         hwsim_check_magic(vif);
 810         hwsim_clear_magic(vif);
 811 }
 812
 813
 814 static void mac80211_hwsim_beacon_tx(void *arg, u8 *mac,
 815                                      struct ieee80211_vif *vif)
 816 {
 817         struct ieee80211_hw *hw = arg;
 818         struct sk_buff *skb;
 819         struct ieee80211_tx_info *info;
 820         u32 _pid;
 821
 822         hwsim_check_magic(vif);
 823
 824         if (vif->type != NL80211_IFTYPE_AP &&
 825             vif->type != NL80211_IFTYPE_MESH_POINT &&
 826             vif->type != NL80211_IFTYPE_ADHOC)
 827                 return;
 828
 829         skb = ieee80211_beacon_get(hw, vif);
 830         if (skb == NULL)
 831                 return;
 832         info = IEEE80211_SKB_CB(skb);
 833
 834         mac80211_hwsim_monitor_rx(hw, skb);
 835
 836         /* wmediumd mode check */
 837         _pid = ACCESS_ONCE(wmediumd_pid);
 838
 839         if (_pid)
 840                 return mac80211_hwsim_tx_frame_nl(hw, skb, _pid);
 841
 842         mac80211_hwsim_tx_frame_no_nl(hw, skb);
 843         dev_kfree_skb(skb);
 844 }
 845
 846
 847 static void mac80211_hwsim_beacon(unsigned long arg)
 848 {
 849         struct ieee80211_hw *hw = (struct ieee80211_hw *) arg;
 850         struct mac80211_hwsim_data *data = hw->priv;
 851
 852         if (!data->started)
 853                 return;
 854
 855         ieee80211_iterate_active_interfaces_atomic(
 856                 hw, mac80211_hwsim_beacon_tx, hw);
 857
 858         data->beacon_timer.expires = jiffies + data->beacon_int;
 859         add_timer(&data->beacon_timer);
 860 }
 861
 862 static const char *hwsim_chantypes[] = {
 863         [NL80211_CHAN_NO_HT] = "noht",
 864         [NL80211_CHAN_HT20] = "ht20",
 865         [NL80211_CHAN_HT40MINUS] = "ht40-",
 866         [NL80211_CHAN_HT40PLUS] = "ht40+",
 867 };
 868
 869 static int mac80211_hwsim_config(struct ieee80211_hw *hw, u32 changed)
 870 {
 871         struct mac80211_hwsim_data *data = hw->priv;
 872         struct ieee80211_conf *conf = &hw->conf;
 873         static const char *smps_modes[IEEE80211_SMPS_NUM_MODES] = {
 874                 [IEEE80211_SMPS_AUTOMATIC] = "auto",
 875                 [IEEE80211_SMPS_OFF] = "off",
 876                 [IEEE80211_SMPS_STATIC] = "static",
 877                 [IEEE80211_SMPS_DYNAMIC] = "dynamic",
 878         };
 879
 880         wiphy_debug(hw->wiphy,
 881                     "%s (freq=%d/%s idle=%d ps=%d smps=%s)\n",
 882                     __func__,
 883                     conf->channel->center_freq,
 884                     hwsim_chantypes[conf->channel_type],
 885                     !!(conf->flags & IEEE80211_CONF_IDLE),
 886                     !!(conf->flags & IEEE80211_CONF_PS),
 887                     smps_modes[conf->smps_mode]);
 888
 889         data->idle = !!(conf->flags & IEEE80211_CONF_IDLE);
 890
 891         data->channel = conf->channel;
 892         data->power_level = conf->power_level;
 893         if (!data->started || !data->beacon_int)
 894                 del_timer(&data->beacon_timer);
 895         else
 896                 mod_timer(&data->beacon_timer, jiffies + data->beacon_int);
 897
 898         return 0;
 899 }
 900
 901
 902 static void mac80211_hwsim_configure_filter(struct ieee80211_hw *hw,
 903                                             unsigned int changed_flags,
 904                                             unsigned int *total_flags,u64 multicast)
 905 {
 906         struct mac80211_hwsim_data *data = hw->priv;
 907
 908         wiphy_debug(hw->wiphy, "%s\n", __func__);
 909
 910         data->rx_filter = 0;
 911         if (*total_flags & FIF_PROMISC_IN_BSS)
 912                 data->rx_filter |= FIF_PROMISC_IN_BSS;
 913         if (*total_flags & FIF_ALLMULTI)
 914                 data->rx_filter |= FIF_ALLMULTI;
 915
 916         *total_flags = data->rx_filter;
 917 }
 918
 919 static void mac80211_hwsim_bss_info_changed(struct ieee80211_hw *hw,
 920                                             struct ieee80211_vif *vif,
 921                                             struct ieee80211_bss_conf *info,
 922                                             u32 changed)
 923 {
 924         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 925         struct mac80211_hwsim_data *data = hw->priv;
 926
 927         hwsim_check_magic(vif);
 928
 929         wiphy_debug(hw->wiphy, "%s(changed=0x%x)\n", __func__, changed);
 930
 931         if (changed & BSS_CHANGED_BSSID) {
 932                 wiphy_debug(hw->wiphy, "%s: BSSID changed: %pM\n",
 933                             __func__, info->bssid);
 934                 memcpy(vp->bssid, info->bssid, ETH_ALEN);
 935         }
 936
 937         if (changed & BSS_CHANGED_ASSOC) {
 938                 wiphy_debug(hw->wiphy, "  ASSOC: assoc=%d aid=%d\n",
 939                             info->assoc, info->aid);
 940                 vp->assoc = info->assoc;
 941                 vp->aid = info->aid;
 942         }
 943
 944         if (changed & BSS_CHANGED_BEACON_INT) {
 945                 wiphy_debug(hw->wiphy, "  BCNINT: %d\n", info->beacon_int);
 946                 data->beacon_int = 1024 * info->beacon_int / 1000 * HZ / 1000;
 947                 if (WARN_ON(!data->beacon_int))
 948                         data->beacon_int = 1;
 949                 if (data->started)
 950                         mod_timer(&data->beacon_timer,
 951                                   jiffies + data->beacon_int);
 952         }
 953
 954         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
 955                 wiphy_debug(hw->wiphy, "  ERP_CTS_PROT: %d\n",
 956                             info->use_cts_prot);
 957         }
 958
 959         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
 960                 wiphy_debug(hw->wiphy, "  ERP_PREAMBLE: %d\n",
 961                             info->use_short_preamble);
 962         }
 963
 964         if (changed & BSS_CHANGED_ERP_SLOT) {
 965                 wiphy_debug(hw->wiphy, "  ERP_SLOT: %d\n", info->use_short_slot);
 966         }
 967
 968         if (changed & BSS_CHANGED_HT) {
 969                 wiphy_debug(hw->wiphy, "  HT: op_mode=0x%x, chantype=%s\n",
 970                             info->ht_operation_mode,
 971                             hwsim_chantypes[info->channel_type]);
 972         }
 973
 974         if (changed & BSS_CHANGED_BASIC_RATES) {
 975                 wiphy_debug(hw->wiphy, "  BASIC_RATES: 0x%llx\n",
 976                             (unsigned long long) info->basic_rates);
 977         }
 978 }
 979
 980 static int mac80211_hwsim_sta_add(struct ieee80211_hw *hw,
 981                                   struct ieee80211_vif *vif,
 982                                   struct ieee80211_sta *sta)
 983 {
 984         hwsim_check_magic(vif);
 985         hwsim_set_sta_magic(sta);
 986
 987         return 0;
 988 }
 989
 990 static int mac80211_hwsim_sta_remove(struct ieee80211_hw *hw,
 991                                      struct ieee80211_vif *vif,
 992                                      struct ieee80211_sta *sta)
 993 {
 994         hwsim_check_magic(vif);
 995         hwsim_clear_sta_magic(sta);
 996
 997         return 0;
 998 }
 999
1000 static void mac80211_hwsim_sta_notify(struct ieee80211_hw *hw,
1001                                       struct ieee80211_vif *vif,
1002                                       enum sta_notify_cmd cmd,
1003                                       struct ieee80211_sta *sta)
1004 {
1005         hwsim_check_magic(vif);
1006
1007         switch (cmd) {
1008         case STA_NOTIFY_SLEEP:
1009         case STA_NOTIFY_AWAKE:
1010                 /* TODO: make good use of these flags */
1011                 break;
1012         default:
1013                 WARN(1, "Invalid sta notify: %d\n", cmd);
1014                 break;
1015         }
1016 }
1017
1018 static int mac80211_hwsim_set_tim(struct ieee80211_hw *hw,
1019                                   struct ieee80211_sta *sta,
1020                                   bool set)
1021 {
1022         hwsim_check_sta_magic(sta);
1023         return 0;
1024 }
1025
1026 static int mac80211_hwsim_conf_tx(
1027         struct ieee80211_hw *hw,
1028         struct ieee80211_vif *vif, u16 queue,
1029         const struct ieee80211_tx_queue_params *params)
1030 {
1031         wiphy_debug(hw->wiphy,
1032                     "%s (queue=%d txop=%d cw_min=%d cw_max=%d aifs=%d)\n",
1033                     __func__, queue,
1034                     params->txop, params->cw_min,
1035                     params->cw_max, params->aifs);
1036         return 0;
1037 }
1038
1039 static int mac80211_hwsim_get_survey(
1040         struct ieee80211_hw *hw, int idx,
1041         struct survey_info *survey)
1042 {
1043         struct ieee80211_conf *conf = &hw->conf;
1044
1045         wiphy_debug(hw->wiphy, "%s (idx=%d)\n", __func__, idx);
1046
1047         if (idx != 0)
1048                 return -ENOENT;
1049
1050         /* Current channel */
1051         survey->channel = conf->channel;
1052
1053         /*
1054          * Magically conjured noise level --- this is only ok for simulated hardware.
1055          *
1056          * A real driver which cannot determine the real channel noise MUST NOT
1057          * report any noise, especially not a magically conjured one :-)
1058          */
1059         survey->filled = SURVEY_INFO_NOISE_DBM;
1060         survey->noise = -92;
1061
1062         return 0;
1063 }
1064
1065 #ifdef CONFIG_NL80211_TESTMODE
1066 /*
1067  * This section contains example code for using netlink
1068  * attributes with the testmode command in nl80211.
1069  */
1070
1071 /* These enums need to be kept in sync with userspace */
1072 enum hwsim_testmode_attr {
1073         __HWSIM_TM_ATTR_INVALID = 0,
1074         HWSIM_TM_ATTR_CMD       = 1,
1075         HWSIM_TM_ATTR_PS        = 2,
1076
1077         /* keep last */
1078         __HWSIM_TM_ATTR_AFTER_LAST,
1079         HWSIM_TM_ATTR_MAX       = __HWSIM_TM_ATTR_AFTER_LAST - 1
1080 };
1081
1082 enum hwsim_testmode_cmd {
1083         HWSIM_TM_CMD_SET_PS             = 0,
1084         HWSIM_TM_CMD_GET_PS             = 1,
1085 };
1086
1087 static const struct nla_policy hwsim_testmode_policy[HWSIM_TM_ATTR_MAX + 1] = {
1088         [HWSIM_TM_ATTR_CMD] = { .type = NLA_U32 },
1089         [HWSIM_TM_ATTR_PS] = { .type = NLA_U32 },
1090 };
1091
1092 static int hwsim_fops_ps_write(void *dat, u64 val);
1093
1094 static int mac80211_hwsim_testmode_cmd(struct ieee80211_hw *hw,
1095                                        void *data, int len)
1096 {
1097         struct mac80211_hwsim_data *hwsim = hw->priv;
1098         struct nlattr *tb[HWSIM_TM_ATTR_MAX + 1];
1099         struct sk_buff *skb;
1100         int err, ps;
1101
1102         err = nla_parse(tb, HWSIM_TM_ATTR_MAX, data, len,
1103                         hwsim_testmode_policy);
1104         if (err)
1105                 return err;
1106
1107         if (!tb[HWSIM_TM_ATTR_CMD])
1108                 return -EINVAL;
1109
1110         switch (nla_get_u32(tb[HWSIM_TM_ATTR_CMD])) {
1111         case HWSIM_TM_CMD_SET_PS:
1112                 if (!tb[HWSIM_TM_ATTR_PS])
1113                         return -EINVAL;
1114                 ps = nla_get_u32(tb[HWSIM_TM_ATTR_PS]);
1115                 return hwsim_fops_ps_write(hwsim, ps);
1116         case HWSIM_TM_CMD_GET_PS:
1117                 skb = cfg80211_testmode_alloc_reply_skb(hw->wiphy,
1118                                                 nla_total_size(sizeof(u32)));
1119                 if (!skb)
1120                         return -ENOMEM;
1121                 if (nla_put_u32(skb, HWSIM_TM_ATTR_PS, hwsim->ps))
1122                         goto nla_put_failure;
1123                 return cfg80211_testmode_reply(skb);
1124         default:
1125                 return -EOPNOTSUPP;
1126         }
1127
1128  nla_put_failure:
1129         kfree_skb(skb);
1130         return -ENOBUFS;
1131 }
1132 #endif
1133
1134 static int mac80211_hwsim_ampdu_action(struct ieee80211_hw *hw,
1135                                        struct ieee80211_vif *vif,
1136                                        enum ieee80211_ampdu_mlme_action action,
1137                                        struct ieee80211_sta *sta, u16 tid, u16 *ssn,
1138                                        u8 buf_size)
1139 {
1140         switch (action) {
1141         case IEEE80211_AMPDU_TX_START:
1142                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1143                 break;
1144         case IEEE80211_AMPDU_TX_STOP:
1145                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1146                 break;
1147         case IEEE80211_AMPDU_TX_OPERATIONAL:
1148                 break;
1149         case IEEE80211_AMPDU_RX_START:
1150         case IEEE80211_AMPDU_RX_STOP:
1151                 break;
1152         default:
1153                 return -EOPNOTSUPP;
1154         }
1155
1156         return 0;
1157 }
1158
1159 static void mac80211_hwsim_flush(struct ieee80211_hw *hw, bool drop)
1160 {
1161         /* Not implemented, queues only on kernel side */
1162 }
1163
1164 struct hw_scan_done {
1165         struct delayed_work w;
1166         struct ieee80211_hw *hw;
1167 };
1168
1169 static void hw_scan_done(struct work_struct *work)
1170 {
1171         struct hw_scan_done *hsd =
1172                 container_of(work, struct hw_scan_done, w.work);
1173
1174         ieee80211_scan_completed(hsd->hw, false);
1175         kfree(hsd);
1176 }
1177
1178 static int mac80211_hwsim_hw_scan(struct ieee80211_hw *hw,
1179                                   struct ieee80211_vif *vif,
1180                                   struct cfg80211_scan_request *req)
1181 {
1182         struct hw_scan_done *hsd = kzalloc(sizeof(*hsd), GFP_KERNEL);
1183         int i;
1184
1185         if (!hsd)
1186                 return -ENOMEM;
1187
1188         hsd->hw = hw;
1189         INIT_DELAYED_WORK(&hsd->w, hw_scan_done);
1190
1191         printk(KERN_DEBUG "hwsim hw_scan request\n");
1192         for (i = 0; i < req->n_channels; i++)
1193                 printk(KERN_DEBUG "hwsim hw_scan freq %d\n",
1194                         req->channels[i]->center_freq);
1195         print_hex_dump(KERN_DEBUG, "scan IEs: ", DUMP_PREFIX_OFFSET,
1196                         16, 1, req->ie, req->ie_len, 1);
1197
1198         ieee80211_queue_delayed_work(hw, &hsd->w, 2 * HZ);
1199
1200         return 0;
1201 }
1202
1203 static void mac80211_hwsim_sw_scan(struct ieee80211_hw *hw)
1204 {
1205         struct mac80211_hwsim_data *hwsim = hw->priv;
1206
1207         mutex_lock(&hwsim->mutex);
1208
1209         if (hwsim->scanning) {
1210                 printk(KERN_DEBUG "two hwsim sw_scans detected!\n");
1211                 goto out;
1212         }
1213
1214         printk(KERN_DEBUG "hwsim sw_scan request, prepping stuff\n");
1215         hwsim->scanning = true;
1216
1217 out:
1218         mutex_unlock(&hwsim->mutex);
1219 }
1220
1221 static void mac80211_hwsim_sw_scan_complete(struct ieee80211_hw *hw)
1222 {
1223         struct mac80211_hwsim_data *hwsim = hw->priv;
1224
1225         mutex_lock(&hwsim->mutex);
1226
1227         printk(KERN_DEBUG "hwsim sw_scan_complete\n");
1228         hwsim->scanning = false;
1229
1230         mutex_unlock(&hwsim->mutex);
1231 }
1232
1233 static struct ieee80211_ops mac80211_hwsim_ops =
1234 {
1235         .tx = mac80211_hwsim_tx,
1236         .start = mac80211_hwsim_start,
1237         .stop = mac80211_hwsim_stop,
1238         .add_interface = mac80211_hwsim_add_interface,
1239         .change_interface = mac80211_hwsim_change_interface,
1240         .remove_interface = mac80211_hwsim_remove_interface,
1241         .config = mac80211_hwsim_config,
1242         .configure_filter = mac80211_hwsim_configure_filter,
1243         .bss_info_changed = mac80211_hwsim_bss_info_changed,
1244         .sta_add = mac80211_hwsim_sta_add,
1245         .sta_remove = mac80211_hwsim_sta_remove,
1246         .sta_notify = mac80211_hwsim_sta_notify,
1247         .set_tim = mac80211_hwsim_set_tim,
1248         .conf_tx = mac80211_hwsim_conf_tx,
1249         .get_survey = mac80211_hwsim_get_survey,
1250         CFG80211_TESTMODE_CMD(mac80211_hwsim_testmode_cmd)
1251         .ampdu_action = mac80211_hwsim_ampdu_action,
1252         .sw_scan_start = mac80211_hwsim_sw_scan,
1253         .sw_scan_complete = mac80211_hwsim_sw_scan_complete,
1254         .flush = mac80211_hwsim_flush,
1255         .get_tsf = mac80211_hwsim_get_tsf,
1256         .set_tsf = mac80211_hwsim_set_tsf,
1257 };
1258
1259
1260 static void mac80211_hwsim_free(void)
1261 {
1262         struct list_head tmplist, *i, *tmp;
1263         struct mac80211_hwsim_data *data, *tmpdata;
1264
1265         INIT_LIST_HEAD(&tmplist);
1266
1267         spin_lock_bh(&hwsim_radio_lock);
1268         list_for_each_safe(i, tmp, &hwsim_radios)
1269                 list_move(i, &tmplist);
1270         spin_unlock_bh(&hwsim_radio_lock);
1271
1272         list_for_each_entry_safe(data, tmpdata, &tmplist, list) {
1273                 debugfs_remove(data->debugfs_group);
1274                 debugfs_remove(data->debugfs_ps);
1275                 debugfs_remove(data->debugfs);
1276                 ieee80211_unregister_hw(data->hw);
1277                 device_unregister(data->dev);
1278                 ieee80211_free_hw(data->hw);
1279         }
1280         class_destroy(hwsim_class);
1281 }
1282
1283
1284 static struct device_driver mac80211_hwsim_driver = {
1285         .name = "mac80211_hwsim"
1286 };
1287
1288 static const struct net_device_ops hwsim_netdev_ops = {
1289         .ndo_start_xmit         = hwsim_mon_xmit,
1290         .ndo_change_mtu         = eth_change_mtu,
1291         .ndo_set_mac_address    = eth_mac_addr,
1292         .ndo_validate_addr      = eth_validate_addr,
1293 };
1294
1295 static void hwsim_mon_setup(struct net_device *dev)
1296 {
1297         dev->netdev_ops = &hwsim_netdev_ops;
1298         dev->destructor = free_netdev;
1299         ether_setup(dev);
1300         dev->tx_queue_len = 0;
1301         dev->type = ARPHRD_IEEE80211_RADIOTAP;
1302         memset(dev->dev_addr, 0, ETH_ALEN);
1303         dev->dev_addr[0] = 0x12;
1304 }
1305
1306
1307 static void hwsim_send_ps_poll(void *dat, u8 *mac, struct ieee80211_vif *vif)
1308 {
1309         struct mac80211_hwsim_data *data = dat;
1310         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
1311         struct sk_buff *skb;
1312         struct ieee80211_pspoll *pspoll;
1313         u32 _pid;
1314
1315         if (!vp->assoc)
1316                 return;
1317
1318         wiphy_debug(data->hw->wiphy,
1319                     "%s: send PS-Poll to %pM for aid %d\n",
1320                     __func__, vp->bssid, vp->aid);
1321
1322         skb = dev_alloc_skb(sizeof(*pspoll));
1323         if (!skb)
1324                 return;
1325         pspoll = (void *) skb_put(skb, sizeof(*pspoll));
1326         pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
1327                                             IEEE80211_STYPE_PSPOLL |
1328                                             IEEE80211_FCTL_PM);
1329         pspoll->aid = cpu_to_le16(0xc000 | vp->aid);
1330         memcpy(pspoll->bssid, vp->bssid, ETH_ALEN);
1331         memcpy(pspoll->ta, mac, ETH_ALEN);
1332
1333         /* wmediumd mode check */
1334         _pid = ACCESS_ONCE(wmediumd_pid);
1335
1336         if (_pid)
1337                 return mac80211_hwsim_tx_frame_nl(data->hw, skb, _pid);
1338
1339         if (!mac80211_hwsim_tx_frame_no_nl(data->hw, skb))
1340                 printk(KERN_DEBUG "%s: PS-poll frame not ack'ed\n", __func__);
1341         dev_kfree_skb(skb);
1342 }
1343
1344
1345 static void hwsim_send_nullfunc(struct mac80211_hwsim_data *data, u8 *mac,
1346                                 struct ieee80211_vif *vif, int ps)
1347 {
1348         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
1349         struct sk_buff *skb;
1350         struct ieee80211_hdr *hdr;
1351         u32 _pid;
1352
1353         if (!vp->assoc)
1354                 return;
1355
1356         wiphy_debug(data->hw->wiphy,
1357                     "%s: send data::nullfunc to %pM ps=%d\n",
1358                     __func__, vp->bssid, ps);
1359
1360         skb = dev_alloc_skb(sizeof(*hdr));
1361         if (!skb)
1362                 return;
1363         hdr = (void *) skb_put(skb, sizeof(*hdr) - ETH_ALEN);
1364         hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
1365                                          IEEE80211_STYPE_NULLFUNC |
1366                                          (ps ? IEEE80211_FCTL_PM : 0));
1367         hdr->duration_id = cpu_to_le16(0);
1368         memcpy(hdr->addr1, vp->bssid, ETH_ALEN);
1369         memcpy(hdr->addr2, mac, ETH_ALEN);
1370         memcpy(hdr->addr3, vp->bssid, ETH_ALEN);
1371
1372         /* wmediumd mode check */
1373         _pid = ACCESS_ONCE(wmediumd_pid);
1374
1375         if (_pid)
1376                 return mac80211_hwsim_tx_frame_nl(data->hw, skb, _pid);
1377
1378         if (!mac80211_hwsim_tx_frame_no_nl(data->hw, skb))
1379                 printk(KERN_DEBUG "%s: nullfunc frame not ack'ed\n", __func__);
1380         dev_kfree_skb(skb);
1381 }
1382
1383
1384 static void hwsim_send_nullfunc_ps(void *dat, u8 *mac,
1385                                    struct ieee80211_vif *vif)
1386 {
1387         struct mac80211_hwsim_data *data = dat;
1388         hwsim_send_nullfunc(data, mac, vif, 1);
1389 }
1390
1391
1392 static void hwsim_send_nullfunc_no_ps(void *dat, u8 *mac,
1393                                       struct ieee80211_vif *vif)
1394 {
1395         struct mac80211_hwsim_data *data = dat;
1396         hwsim_send_nullfunc(data, mac, vif, 0);
1397 }
1398
1399
1400 static int hwsim_fops_ps_read(void *dat, u64 *val)
1401 {
1402         struct mac80211_hwsim_data *data = dat;
1403         *val = data->ps;
1404         return 0;
1405 }
1406
1407 static int hwsim_fops_ps_write(void *dat, u64 val)
1408 {
1409         struct mac80211_hwsim_data *data = dat;
1410         enum ps_mode old_ps;
1411
1412         if (val != PS_DISABLED && val != PS_ENABLED && val != PS_AUTO_POLL &&
1413             val != PS_MANUAL_POLL)
1414                 return -EINVAL;
1415
1416         old_ps = data->ps;
1417         data->ps = val;
1418
1419         if (val == PS_MANUAL_POLL) {
1420                 ieee80211_iterate_active_interfaces(data->hw,
1421                                                     hwsim_send_ps_poll, data);
1422                 data->ps_poll_pending = true;
1423         } else if (old_ps == PS_DISABLED && val != PS_DISABLED) {
1424                 ieee80211_iterate_active_interfaces(data->hw,
1425                                                     hwsim_send_nullfunc_ps,
1426                                                     data);
1427         } else if (old_ps != PS_DISABLED && val == PS_DISABLED) {
1428                 ieee80211_iterate_active_interfaces(data->hw,
1429                                                     hwsim_send_nullfunc_no_ps,
1430                                                     data);
1431         }
1432
1433         return 0;
1434 }
1435
1436 DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_ps, hwsim_fops_ps_read, hwsim_fops_ps_write,
1437                         "%llu\n");
1438
1439
1440 static int hwsim_fops_group_read(void *dat, u64 *val)
1441 {
1442         struct mac80211_hwsim_data *data = dat;
1443         *val = data->group;
1444         return 0;
1445 }
1446
1447 static int hwsim_fops_group_write(void *dat, u64 val)
1448 {
1449         struct mac80211_hwsim_data *data = dat;
1450         data->group = val;
1451         return 0;
1452 }
1453
1454 DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_group,
1455                         hwsim_fops_group_read, hwsim_fops_group_write,
1456                         "%llx\n");
1457
1458 static struct mac80211_hwsim_data *get_hwsim_data_ref_from_addr(
1459                              struct mac_address *addr)
1460 {
1461         struct mac80211_hwsim_data *data;
1462         bool _found = false;
1463
1464         spin_lock_bh(&hwsim_radio_lock);
1465         list_for_each_entry(data, &hwsim_radios, list) {
1466                 if (memcmp(data->addresses[1].addr, addr,
1467                           sizeof(struct mac_address)) == 0) {
1468                         _found = true;
1469                         break;
1470                 }
1471         }
1472         spin_unlock_bh(&hwsim_radio_lock);
1473
1474         if (!_found)
1475                 return NULL;
1476
1477         return data;
1478 }
1479
1480 static int hwsim_tx_info_frame_received_nl(struct sk_buff *skb_2,
1481                                            struct genl_info *info)
1482 {
1483
1484         struct ieee80211_hdr *hdr;
1485         struct mac80211_hwsim_data *data2;
1486         struct ieee80211_tx_info *txi;
1487         struct hwsim_tx_rate *tx_attempts;
1488         unsigned long ret_skb_ptr;
1489         struct sk_buff *skb, *tmp;
1490         struct mac_address *src;
1491         unsigned int hwsim_flags;
1492
1493         int i;
1494         bool found = false;
1495
1496         if (!info->attrs[HWSIM_ATTR_ADDR_TRANSMITTER] ||
1497            !info->attrs[HWSIM_ATTR_FLAGS] ||
1498            !info->attrs[HWSIM_ATTR_COOKIE] ||
1499            !info->attrs[HWSIM_ATTR_TX_INFO])
1500                 goto out;
1501
1502         src = (struct mac_address *)nla_data(
1503                                    info->attrs[HWSIM_ATTR_ADDR_TRANSMITTER]);
1504         hwsim_flags = nla_get_u32(info->attrs[HWSIM_ATTR_FLAGS]);
1505
1506         ret_skb_ptr = nla_get_u64(info->attrs[HWSIM_ATTR_COOKIE]);
1507
1508         data2 = get_hwsim_data_ref_from_addr(src);
1509
1510         if (data2 == NULL)
1511                 goto out;
1512
1513         /* look for the skb matching the cookie passed back from user */
1514         skb_queue_walk_safe(&data2->pending, skb, tmp) {
1515                 if ((unsigned long)skb == ret_skb_ptr) {
1516                         skb_unlink(skb, &data2->pending);
1517                         found = true;
1518                         break;
1519                 }
1520         }
1521
1522         /* not found */
1523         if (!found)
1524                 goto out;
1525
1526         /* Tx info received because the frame was broadcasted on user space,
1527          so we get all the necessary info: tx attempts and skb control buff */
1528
1529         tx_attempts = (struct hwsim_tx_rate *)nla_data(
1530                        info->attrs[HWSIM_ATTR_TX_INFO]);
1531
1532         /* now send back TX status */
1533         txi = IEEE80211_SKB_CB(skb);
1534
1535         if (txi->control.vif)
1536                 hwsim_check_magic(txi->control.vif);
1537         if (txi->control.sta)
1538                 hwsim_check_sta_magic(txi->control.sta);
1539
1540         ieee80211_tx_info_clear_status(txi);
1541
1542         for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
1543                 txi->status.rates[i].idx = tx_attempts[i].idx;
1544                 txi->status.rates[i].count = tx_attempts[i].count;
1545                 /*txi->status.rates[i].flags = 0;*/
1546         }
1547
1548         txi->status.ack_signal = nla_get_u32(info->attrs[HWSIM_ATTR_SIGNAL]);
1549
1550         if (!(hwsim_flags & HWSIM_TX_CTL_NO_ACK) &&
1551            (hwsim_flags & HWSIM_TX_STAT_ACK)) {
1552                 if (skb->len >= 16) {
1553                         hdr = (struct ieee80211_hdr *) skb->data;
1554                         mac80211_hwsim_monitor_ack(data2->hw, hdr->addr2);
1555                 }
1556         }
1557         ieee80211_tx_status_irqsafe(data2->hw, skb);
1558         return 0;
1559 out:
1560         return -EINVAL;
1561
1562 }
1563
1564 static int hwsim_cloned_frame_received_nl(struct sk_buff *skb_2,
1565                                           struct genl_info *info)
1566 {
1567
1568         struct mac80211_hwsim_data  *data2;
1569         struct ieee80211_rx_status rx_status;
1570         struct mac_address *dst;
1571         int frame_data_len;
1572         char *frame_data;
1573         struct sk_buff *skb = NULL;
1574
1575         if (!info->attrs[HWSIM_ATTR_ADDR_RECEIVER] ||
1576            !info->attrs[HWSIM_ATTR_FRAME] ||
1577            !info->attrs[HWSIM_ATTR_RX_RATE] ||
1578            !info->attrs[HWSIM_ATTR_SIGNAL])
1579                 goto out;
1580
1581         dst = (struct mac_address *)nla_data(
1582                                    info->attrs[HWSIM_ATTR_ADDR_RECEIVER]);
1583
1584         frame_data_len = nla_len(info->attrs[HWSIM_ATTR_FRAME]);
1585         frame_data = (char *)nla_data(info->attrs[HWSIM_ATTR_FRAME]);
1586
1587         /* Allocate new skb here */
1588         skb = alloc_skb(frame_data_len, GFP_KERNEL);
1589         if (skb == NULL)
1590                 goto err;
1591
1592         if (frame_data_len <= IEEE80211_MAX_DATA_LEN) {
1593                 /* Copy the data */
1594                 memcpy(skb_put(skb, frame_data_len), frame_data,
1595                        frame_data_len);
1596         } else
1597                 goto err;
1598
1599         data2 = get_hwsim_data_ref_from_addr(dst);
1600
1601         if (data2 == NULL)
1602                 goto out;
1603
1604         /* check if radio is configured properly */
1605
1606         if (data2->idle || !data2->started || !data2->channel)
1607                 goto out;
1608
1609         /*A frame is received from user space*/
1610         memset(&rx_status, 0, sizeof(rx_status));
1611         rx_status.freq = data2->channel->center_freq;
1612         rx_status.band = data2->channel->band;
1613         rx_status.rate_idx = nla_get_u32(info->attrs[HWSIM_ATTR_RX_RATE]);
1614         rx_status.signal = nla_get_u32(info->attrs[HWSIM_ATTR_SIGNAL]);
1615
1616         memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
1617         ieee80211_rx_irqsafe(data2->hw, skb);
1618
1619         return 0;
1620 err:
1621         printk(KERN_DEBUG "mac80211_hwsim: error occurred in %s\n", __func__);
1622         goto out;
1623 out:
1624         dev_kfree_skb(skb);
1625         return -EINVAL;
1626 }
1627
1628 static int hwsim_register_received_nl(struct sk_buff *skb_2,
1629                                       struct genl_info *info)
1630 {
1631         if (info == NULL)
1632                 goto out;
1633
1634         wmediumd_pid = info->snd_pid;
1635
1636         printk(KERN_DEBUG "mac80211_hwsim: received a REGISTER, "
1637                "switching to wmediumd mode with pid %d\n", info->snd_pid);
1638
1639         return 0;
1640 out:
1641         printk(KERN_DEBUG "mac80211_hwsim: error occurred in %s\n", __func__);
1642         return -EINVAL;
1643 }
1644
1645 /* Generic Netlink operations array */
1646 static struct genl_ops hwsim_ops[] = {
1647         {
1648                 .cmd = HWSIM_CMD_REGISTER,
1649                 .policy = hwsim_genl_policy,
1650                 .doit = hwsim_register_received_nl,
1651                 .flags = GENL_ADMIN_PERM,
1652         },
1653         {
1654                 .cmd = HWSIM_CMD_FRAME,
1655                 .policy = hwsim_genl_policy,
1656                 .doit = hwsim_cloned_frame_received_nl,
1657         },
1658         {
1659                 .cmd = HWSIM_CMD_TX_INFO_FRAME,
1660                 .policy = hwsim_genl_policy,
1661                 .doit = hwsim_tx_info_frame_received_nl,
1662         },
1663 };
1664
1665 static int mac80211_hwsim_netlink_notify(struct notifier_block *nb,
1666                                          unsigned long state,
1667                                          void *_notify)
1668 {
1669         struct netlink_notify *notify = _notify;
1670
1671         if (state != NETLINK_URELEASE)
1672                 return NOTIFY_DONE;
1673
1674         if (notify->pid == wmediumd_pid) {
1675                 printk(KERN_INFO "mac80211_hwsim: wmediumd released netlink"
1676                        " socket, switching to perfect channel medium\n");
1677                 wmediumd_pid = 0;
1678         }
1679         return NOTIFY_DONE;
1680
1681 }
1682
1683 static struct notifier_block hwsim_netlink_notifier = {
1684         .notifier_call = mac80211_hwsim_netlink_notify,
1685 };
1686
1687 static int hwsim_init_netlink(void)
1688 {
1689         int rc;
1690         printk(KERN_INFO "mac80211_hwsim: initializing netlink\n");
1691
1692         rc = genl_register_family_with_ops(&hwsim_genl_family,
1693                 hwsim_ops, ARRAY_SIZE(hwsim_ops));
1694         if (rc)
1695                 goto failure;
1696
1697         rc = netlink_register_notifier(&hwsim_netlink_notifier);
1698         if (rc)
1699                 goto failure;
1700
1701         return 0;
1702
1703 failure:
1704         printk(KERN_DEBUG "mac80211_hwsim: error occurred in %s\n", __func__);
1705         return -EINVAL;
1706 }
1707
1708 static void hwsim_exit_netlink(void)
1709 {
1710         int ret;
1711
1712         printk(KERN_INFO "mac80211_hwsim: closing netlink\n");
1713         /* unregister the notifier */
1714         netlink_unregister_notifier(&hwsim_netlink_notifier);
1715         /* unregister the family */
1716         ret = genl_unregister_family(&hwsim_genl_family);
1717         if (ret)
1718                 printk(KERN_DEBUG "mac80211_hwsim: "
1719                        "unregister family %i\n", ret);
1720 }
1721
1722 static const struct ieee80211_iface_limit hwsim_if_limits[] = {
1723         { .max = 1, .types = BIT(NL80211_IFTYPE_ADHOC) },
1724         { .max = 2048,  .types = BIT(NL80211_IFTYPE_STATION) |
1725                                  BIT(NL80211_IFTYPE_P2P_CLIENT) |
1726 #ifdef CONFIG_MAC80211_MESH
1727                                  BIT(NL80211_IFTYPE_MESH_POINT) |
1728 #endif
1729                                  BIT(NL80211_IFTYPE_AP) |
1730                                  BIT(NL80211_IFTYPE_P2P_GO) },
1731 };
1732
1733 static const struct ieee80211_iface_combination hwsim_if_comb = {
1734         .limits = hwsim_if_limits,
1735         .n_limits = ARRAY_SIZE(hwsim_if_limits),
1736         .max_interfaces = 2048,
1737         .num_different_channels = 1,
1738 };
1739
1740 static int __init init_mac80211_hwsim(void)
1741 {
1742         int i, err = 0;
1743         u8 addr[ETH_ALEN];
1744         struct mac80211_hwsim_data *data;
1745         struct ieee80211_hw *hw;
1746         enum ieee80211_band band;
1747
1748         if (radios < 1 || radios > 100)
1749                 return -EINVAL;
1750
1751         if (fake_hw_scan) {
1752                 mac80211_hwsim_ops.hw_scan = mac80211_hwsim_hw_scan;
1753                 mac80211_hwsim_ops.sw_scan_start = NULL;
1754                 mac80211_hwsim_ops.sw_scan_complete = NULL;
1755         }
1756
1757         spin_lock_init(&hwsim_radio_lock);
1758         INIT_LIST_HEAD(&hwsim_radios);
1759
1760         hwsim_class = class_create(THIS_MODULE, "mac80211_hwsim");
1761         if (IS_ERR(hwsim_class))
1762                 return PTR_ERR(hwsim_class);
1763
1764         memset(addr, 0, ETH_ALEN);
1765         addr[0] = 0x02;
1766
1767         for (i = 0; i < radios; i++) {
1768                 printk(KERN_DEBUG "mac80211_hwsim: Initializing radio %d\n",
1769                        i);
1770                 hw = ieee80211_alloc_hw(sizeof(*data), &mac80211_hwsim_ops);
1771                 if (!hw) {
1772                         printk(KERN_DEBUG "mac80211_hwsim: ieee80211_alloc_hw "
1773                                "failed\n");
1774                         err = -ENOMEM;
1775                         goto failed;
1776                 }
1777                 data = hw->priv;
1778                 data->hw = hw;
1779
1780                 data->dev = device_create(hwsim_class, NULL, 0, hw,
1781                                           "hwsim%d", i);
1782                 if (IS_ERR(data->dev)) {
1783                         printk(KERN_DEBUG
1784                                "mac80211_hwsim: device_create "
1785                                "failed (%ld)\n", PTR_ERR(data->dev));
1786                         err = -ENOMEM;
1787                         goto failed_drvdata;
1788                 }
1789                 data->dev->driver = &mac80211_hwsim_driver;
1790                 skb_queue_head_init(&data->pending);
1791
1792                 SET_IEEE80211_DEV(hw, data->dev);
1793                 addr[3] = i >> 8;
1794                 addr[4] = i;
1795                 memcpy(data->addresses[0].addr, addr, ETH_ALEN);
1796                 memcpy(data->addresses[1].addr, addr, ETH_ALEN);
1797                 data->addresses[1].addr[0] |= 0x40;
1798                 hw->wiphy->n_addresses = 2;
1799                 hw->wiphy->addresses = data->addresses;
1800
1801                 hw->wiphy->iface_combinations = &hwsim_if_comb;
1802                 hw->wiphy->n_iface_combinations = 1;
1803
1804                 if (fake_hw_scan) {
1805                         hw->wiphy->max_scan_ssids = 255;
1806                         hw->wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1807                 }
1808
1809                 hw->channel_change_time = 1;
1810                 hw->queues = 4;
1811                 hw->wiphy->interface_modes =
1812                         BIT(NL80211_IFTYPE_STATION) |
1813                         BIT(NL80211_IFTYPE_AP) |
1814                         BIT(NL80211_IFTYPE_P2P_CLIENT) |
1815                         BIT(NL80211_IFTYPE_P2P_GO) |
1816                         BIT(NL80211_IFTYPE_ADHOC) |
1817                         BIT(NL80211_IFTYPE_MESH_POINT);
1818
1819                 hw->flags = IEEE80211_HW_MFP_CAPABLE |
1820                             IEEE80211_HW_SIGNAL_DBM |
1821                             IEEE80211_HW_SUPPORTS_STATIC_SMPS |
1822                             IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
1823                             IEEE80211_HW_AMPDU_AGGREGATION |
1824                             IEEE80211_HW_WANT_MONITOR_VIF;
1825
1826                 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS |
1827                                     WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
1828
1829                 /* ask mac80211 to reserve space for magic */
1830                 hw->vif_data_size = sizeof(struct hwsim_vif_priv);
1831                 hw->sta_data_size = sizeof(struct hwsim_sta_priv);
1832
1833                 memcpy(data->channels_2ghz, hwsim_channels_2ghz,
1834                         sizeof(hwsim_channels_2ghz));
1835                 memcpy(data->channels_5ghz, hwsim_channels_5ghz,
1836                         sizeof(hwsim_channels_5ghz));
1837                 memcpy(data->rates, hwsim_rates, sizeof(hwsim_rates));
1838
1839                 for (band = IEEE80211_BAND_2GHZ; band < IEEE80211_NUM_BANDS; band++) {
1840                         struct ieee80211_supported_band *sband = &data->bands[band];
1841                         switch (band) {
1842                         case IEEE80211_BAND_2GHZ:
1843                                 sband->channels = data->channels_2ghz;
1844                                 sband->n_channels =
1845                                         ARRAY_SIZE(hwsim_channels_2ghz);
1846                                 sband->bitrates = data->rates;
1847                                 sband->n_bitrates = ARRAY_SIZE(hwsim_rates);
1848                                 break;
1849                         case IEEE80211_BAND_5GHZ:
1850                                 sband->channels = data->channels_5ghz;
1851                                 sband->n_channels =
1852                                         ARRAY_SIZE(hwsim_channels_5ghz);
1853                                 sband->bitrates = data->rates + 4;
1854                                 sband->n_bitrates = ARRAY_SIZE(hwsim_rates) - 4;
1855                                 break;
1856                         default:
1857                                 break;
1858                         }
1859
1860                         sband->ht_cap.ht_supported = true;
1861                         sband->ht_cap.cap = IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
1862                                 IEEE80211_HT_CAP_GRN_FLD |
1863                                 IEEE80211_HT_CAP_SGI_40 |
1864                                 IEEE80211_HT_CAP_DSSSCCK40;
1865                         sband->ht_cap.ampdu_factor = 0x3;
1866                         sband->ht_cap.ampdu_density = 0x6;
1867                         memset(&sband->ht_cap.mcs, 0,
1868                                sizeof(sband->ht_cap.mcs));
1869                         sband->ht_cap.mcs.rx_mask[0] = 0xff;
1870                         sband->ht_cap.mcs.rx_mask[1] = 0xff;
1871                         sband->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
1872
1873                         hw->wiphy->bands[band] = sband;
1874                 }
1875                 /* By default all radios are belonging to the first group */
1876                 data->group = 1;
1877                 mutex_init(&data->mutex);
1878
1879                 /* Enable frame retransmissions for lossy channels */
1880                 hw->max_rates = 4;
1881                 hw->max_rate_tries = 11;
1882
1883                 /* Work to be done prior to ieee80211_register_hw() */
1884                 switch (regtest) {
1885                 case HWSIM_REGTEST_DISABLED:
1886                 case HWSIM_REGTEST_DRIVER_REG_FOLLOW:
1887                 case HWSIM_REGTEST_DRIVER_REG_ALL:
1888                 case HWSIM_REGTEST_DIFF_COUNTRY:
1889                         /*
1890                          * Nothing to be done for driver regulatory domain
1891                          * hints prior to ieee80211_register_hw()
1892                          */
1893                         break;
1894                 case HWSIM_REGTEST_WORLD_ROAM:
1895                         if (i == 0) {
1896                                 hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY;
1897                                 wiphy_apply_custom_regulatory(hw->wiphy,
1898                                         &hwsim_world_regdom_custom_01);
1899                         }
1900                         break;
1901                 case HWSIM_REGTEST_CUSTOM_WORLD:
1902                         hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY;
1903                         wiphy_apply_custom_regulatory(hw->wiphy,
1904                                 &hwsim_world_regdom_custom_01);
1905                         break;
1906                 case HWSIM_REGTEST_CUSTOM_WORLD_2:
1907                         if (i == 0) {
1908                                 hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY;
1909                                 wiphy_apply_custom_regulatory(hw->wiphy,
1910                                         &hwsim_world_regdom_custom_01);
1911                         } else if (i == 1) {
1912                                 hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY;
1913                                 wiphy_apply_custom_regulatory(hw->wiphy,
1914                                         &hwsim_world_regdom_custom_02);
1915                         }
1916                         break;
1917                 case HWSIM_REGTEST_STRICT_ALL:
1918                         hw->wiphy->flags |= WIPHY_FLAG_STRICT_REGULATORY;
1919                         break;
1920                 case HWSIM_REGTEST_STRICT_FOLLOW:
1921                 case HWSIM_REGTEST_STRICT_AND_DRIVER_REG:
1922                         if (i == 0)
1923                                 hw->wiphy->flags |= WIPHY_FLAG_STRICT_REGULATORY;
1924                         break;
1925                 case HWSIM_REGTEST_ALL:
1926                         if (i == 0) {
1927                                 hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY;
1928                                 wiphy_apply_custom_regulatory(hw->wiphy,
1929                                         &hwsim_world_regdom_custom_01);
1930                         } else if (i == 1) {
1931                                 hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY;
1932                                 wiphy_apply_custom_regulatory(hw->wiphy,
1933                                         &hwsim_world_regdom_custom_02);
1934                         } else if (i == 4)
1935                                 hw->wiphy->flags |= WIPHY_FLAG_STRICT_REGULATORY;
1936                         break;
1937                 default:
1938                         break;
1939                 }
1940
1941                 /* give the regulatory workqueue a chance to run */
1942                 if (regtest)
1943                         schedule_timeout_interruptible(1);
1944                 err = ieee80211_register_hw(hw);
1945                 if (err < 0) {
1946                         printk(KERN_DEBUG "mac80211_hwsim: "
1947                                "ieee80211_register_hw failed (%d)\n", err);
1948                         goto failed_hw;
1949                 }
1950
1951                 /* Work to be done after to ieee80211_register_hw() */
1952                 switch (regtest) {
1953                 case HWSIM_REGTEST_WORLD_ROAM:
1954                 case HWSIM_REGTEST_DISABLED:
1955                         break;
1956                 case HWSIM_REGTEST_DRIVER_REG_FOLLOW:
1957                         if (!i)
1958                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
1959                         break;
1960                 case HWSIM_REGTEST_DRIVER_REG_ALL:
1961                 case HWSIM_REGTEST_STRICT_ALL:
1962                         regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
1963                         break;
1964                 case HWSIM_REGTEST_DIFF_COUNTRY:
1965                         if (i < ARRAY_SIZE(hwsim_alpha2s))
1966                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[i]);
1967                         break;
1968                 case HWSIM_REGTEST_CUSTOM_WORLD:
1969                 case HWSIM_REGTEST_CUSTOM_WORLD_2:
1970                         /*
1971                          * Nothing to be done for custom world regulatory
1972                          * domains after to ieee80211_register_hw
1973                          */
1974                         break;
1975                 case HWSIM_REGTEST_STRICT_FOLLOW:
1976                         if (i == 0)
1977                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
1978                         break;
1979                 case HWSIM_REGTEST_STRICT_AND_DRIVER_REG:
1980                         if (i == 0)
1981                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
1982                         else if (i == 1)
1983                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[1]);
1984                         break;
1985                 case HWSIM_REGTEST_ALL:
1986                         if (i == 2)
1987                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
1988                         else if (i == 3)
1989                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[1]);
1990                         else if (i == 4)
1991                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[2]);
1992                         break;
1993                 default:
1994                         break;
1995                 }
1996
1997                 wiphy_debug(hw->wiphy, "hwaddr %pm registered\n",
1998                             hw->wiphy->perm_addr);
1999
2000                 data->debugfs = debugfs_create_dir("hwsim",
2001                                                    hw->wiphy->debugfsdir);
2002                 data->debugfs_ps = debugfs_create_file("ps", 0666,
2003                                                        data->debugfs, data,
2004                                                        &hwsim_fops_ps);
2005                 data->debugfs_group = debugfs_create_file("group", 0666,
2006                                                         data->debugfs, data,
2007                                                         &hwsim_fops_group);
2008
2009                 setup_timer(&data->beacon_timer, mac80211_hwsim_beacon,
2010                             (unsigned long) hw);
2011
2012                 list_add_tail(&data->list, &hwsim_radios);
2013         }
2014
2015         hwsim_mon = alloc_netdev(0, "hwsim%d", hwsim_mon_setup);
2016         if (hwsim_mon == NULL)
2017                 goto failed;
2018
2019         rtnl_lock();
2020
2021         err = dev_alloc_name(hwsim_mon, hwsim_mon->name);
2022         if (err < 0)
2023                 goto failed_mon;
2024
2025
2026         err = register_netdevice(hwsim_mon);
2027         if (err < 0)
2028                 goto failed_mon;
2029
2030         rtnl_unlock();
2031
2032         err = hwsim_init_netlink();
2033         if (err < 0)
2034                 goto failed_nl;
2035
2036         return 0;
2037
2038 failed_nl:
2039         printk(KERN_DEBUG "mac_80211_hwsim: failed initializing netlink\n");
2040         return err;
2041
2042 failed_mon:
2043         rtnl_unlock();
2044         free_netdev(hwsim_mon);
2045         mac80211_hwsim_free();
2046         return err;
2047
2048 failed_hw:
2049         device_unregister(data->dev);
2050 failed_drvdata:
2051         ieee80211_free_hw(hw);
2052 failed:
2053         mac80211_hwsim_free();
2054         return err;
2055 }
2056
2057
2058 static void __exit exit_mac80211_hwsim(void)
2059 {
2060         printk(KERN_DEBUG "mac80211_hwsim: unregister radios\n");
2061
2062         hwsim_exit_netlink();
2063
2064         mac80211_hwsim_free();
2065         unregister_netdev(hwsim_mon);
2066 }
2067
2068
2069 module_init(init_mac80211_hwsim);
2070 module_exit(exit_mac80211_hwsim);