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) ||
 682                     !data->channel || !data2->channel ||
 683                     data->channel->center_freq != data2->channel->center_freq ||
 684                     !(data->group & data2->group))
 685                         continue;
 686
 687                 nskb = skb_copy(skb, GFP_ATOMIC);
 688                 if (nskb == NULL)
 689                         continue;
 690
 691                 if (mac80211_hwsim_addr_match(data2, hdr->addr1))
 692                         ack = true;
 693
 694                 /* set bcn timestamp relative to receiver mactime */
 695                 rx_status.mactime =
 696                                 le64_to_cpu(__mac80211_hwsim_get_tsf(data2));
 697                 mgmt = (struct ieee80211_mgmt *) nskb->data;
 698                 if (ieee80211_is_beacon(mgmt->frame_control) ||
 699                     ieee80211_is_probe_resp(mgmt->frame_control))
 700                         mgmt->u.beacon.timestamp = cpu_to_le64(
 701                                 rx_status.mactime +
 702                                 (data->tsf_offset - data2->tsf_offset) +
 703                                 24 * 8 * 10 / txrate->bitrate);
 704
 705                 memcpy(IEEE80211_SKB_RXCB(nskb), &rx_status, sizeof(rx_status));
 706                 ieee80211_rx_irqsafe(data2->hw, nskb);
 707         }
 708         spin_unlock(&hwsim_radio_lock);
 709
 710         return ack;
 711 }
 712
 713 static void mac80211_hwsim_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 714 {
 715         bool ack;
 716         struct ieee80211_tx_info *txi;
 717         u32 _pid;
 718
 719         mac80211_hwsim_monitor_rx(hw, skb);
 720
 721         if (skb->len < 10) {
 722                 /* Should not happen; just a sanity check for addr1 use */
 723                 dev_kfree_skb(skb);
 724                 return;
 725         }
 726
 727         /* wmediumd mode check */
 728         _pid = ACCESS_ONCE(wmediumd_pid);
 729
 730         if (_pid)
 731                 return mac80211_hwsim_tx_frame_nl(hw, skb, _pid);
 732
 733         /* NO wmediumd detected, perfect medium simulation */
 734         ack = mac80211_hwsim_tx_frame_no_nl(hw, skb);
 735
 736         if (ack && skb->len >= 16) {
 737                 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 738                 mac80211_hwsim_monitor_ack(hw, hdr->addr2);
 739         }
 740
 741         txi = IEEE80211_SKB_CB(skb);
 742
 743         if (txi->control.vif)
 744                 hwsim_check_magic(txi->control.vif);
 745         if (txi->control.sta)
 746                 hwsim_check_sta_magic(txi->control.sta);
 747
 748         ieee80211_tx_info_clear_status(txi);
 749
 750         /* frame was transmitted at most favorable rate at first attempt */
 751         txi->control.rates[0].count = 1;
 752         txi->control.rates[1].idx = -1;
 753
 754         if (!(txi->flags & IEEE80211_TX_CTL_NO_ACK) && ack)
 755                 txi->flags |= IEEE80211_TX_STAT_ACK;
 756         ieee80211_tx_status_irqsafe(hw, skb);
 757 }
 758
 759
 760 static int mac80211_hwsim_start(struct ieee80211_hw *hw)
 761 {
 762         struct mac80211_hwsim_data *data = hw->priv;
 763         wiphy_debug(hw->wiphy, "%s\n", __func__);
 764         data->started = true;
 765         return 0;
 766 }
 767
 768
 769 static void mac80211_hwsim_stop(struct ieee80211_hw *hw)
 770 {
 771         struct mac80211_hwsim_data *data = hw->priv;
 772         data->started = false;
 773         del_timer(&data->beacon_timer);
 774         wiphy_debug(hw->wiphy, "%s\n", __func__);
 775 }
 776
 777
 778 static int mac80211_hwsim_add_interface(struct ieee80211_hw *hw,
 779                                         struct ieee80211_vif *vif)
 780 {
 781         wiphy_debug(hw->wiphy, "%s (type=%d mac_addr=%pM)\n",
 782                     __func__, ieee80211_vif_type_p2p(vif),
 783                     vif->addr);
 784         hwsim_set_magic(vif);
 785         return 0;
 786 }
 787
 788
 789 static int mac80211_hwsim_change_interface(struct ieee80211_hw *hw,
 790                                            struct ieee80211_vif *vif,
 791                                            enum nl80211_iftype newtype,
 792                                            bool newp2p)
 793 {
 794         newtype = ieee80211_iftype_p2p(newtype, newp2p);
 795         wiphy_debug(hw->wiphy,
 796                     "%s (old type=%d, new type=%d, mac_addr=%pM)\n",
 797                     __func__, ieee80211_vif_type_p2p(vif),
 798                     newtype, vif->addr);
 799         hwsim_check_magic(vif);
 800
 801         return 0;
 802 }
 803
 804 static void mac80211_hwsim_remove_interface(
 805         struct ieee80211_hw *hw, struct ieee80211_vif *vif)
 806 {
 807         wiphy_debug(hw->wiphy, "%s (type=%d mac_addr=%pM)\n",
 808                     __func__, ieee80211_vif_type_p2p(vif),
 809                     vif->addr);
 810         hwsim_check_magic(vif);
 811         hwsim_clear_magic(vif);
 812 }
 813
 814
 815 static void mac80211_hwsim_beacon_tx(void *arg, u8 *mac,
 816                                      struct ieee80211_vif *vif)
 817 {
 818         struct ieee80211_hw *hw = arg;
 819         struct sk_buff *skb;
 820         struct ieee80211_tx_info *info;
 821         u32 _pid;
 822
 823         hwsim_check_magic(vif);
 824
 825         if (vif->type != NL80211_IFTYPE_AP &&
 826             vif->type != NL80211_IFTYPE_MESH_POINT &&
 827             vif->type != NL80211_IFTYPE_ADHOC)
 828                 return;
 829
 830         skb = ieee80211_beacon_get(hw, vif);
 831         if (skb == NULL)
 832                 return;
 833         info = IEEE80211_SKB_CB(skb);
 834
 835         mac80211_hwsim_monitor_rx(hw, skb);
 836
 837         /* wmediumd mode check */
 838         _pid = ACCESS_ONCE(wmediumd_pid);
 839
 840         if (_pid)
 841                 return mac80211_hwsim_tx_frame_nl(hw, skb, _pid);
 842
 843         mac80211_hwsim_tx_frame_no_nl(hw, skb);
 844         dev_kfree_skb(skb);
 845 }
 846
 847
 848 static void mac80211_hwsim_beacon(unsigned long arg)
 849 {
 850         struct ieee80211_hw *hw = (struct ieee80211_hw *) arg;
 851         struct mac80211_hwsim_data *data = hw->priv;
 852
 853         if (!data->started)
 854                 return;
 855
 856         ieee80211_iterate_active_interfaces_atomic(
 857                 hw, mac80211_hwsim_beacon_tx, hw);
 858
 859         data->beacon_timer.expires = jiffies + data->beacon_int;
 860         add_timer(&data->beacon_timer);
 861 }
 862
 863 static const char *hwsim_chantypes[] = {
 864         [NL80211_CHAN_NO_HT] = "noht",
 865         [NL80211_CHAN_HT20] = "ht20",
 866         [NL80211_CHAN_HT40MINUS] = "ht40-",
 867         [NL80211_CHAN_HT40PLUS] = "ht40+",
 868 };
 869
 870 static int mac80211_hwsim_config(struct ieee80211_hw *hw, u32 changed)
 871 {
 872         struct mac80211_hwsim_data *data = hw->priv;
 873         struct ieee80211_conf *conf = &hw->conf;
 874         static const char *smps_modes[IEEE80211_SMPS_NUM_MODES] = {
 875                 [IEEE80211_SMPS_AUTOMATIC] = "auto",
 876                 [IEEE80211_SMPS_OFF] = "off",
 877                 [IEEE80211_SMPS_STATIC] = "static",
 878                 [IEEE80211_SMPS_DYNAMIC] = "dynamic",
 879         };
 880
 881         wiphy_debug(hw->wiphy,
 882                     "%s (freq=%d/%s idle=%d ps=%d smps=%s)\n",
 883                     __func__,
 884                     conf->channel->center_freq,
 885                     hwsim_chantypes[conf->channel_type],
 886                     !!(conf->flags & IEEE80211_CONF_IDLE),
 887                     !!(conf->flags & IEEE80211_CONF_PS),
 888                     smps_modes[conf->smps_mode]);
 889
 890         data->idle = !!(conf->flags & IEEE80211_CONF_IDLE);
 891
 892         data->channel = conf->channel;
 893         data->power_level = conf->power_level;
 894         if (!data->started || !data->beacon_int)
 895                 del_timer(&data->beacon_timer);
 896         else
 897                 mod_timer(&data->beacon_timer, jiffies + data->beacon_int);
 898
 899         return 0;
 900 }
 901
 902
 903 static void mac80211_hwsim_configure_filter(struct ieee80211_hw *hw,
 904                                             unsigned int changed_flags,
 905                                             unsigned int *total_flags,u64 multicast)
 906 {
 907         struct mac80211_hwsim_data *data = hw->priv;
 908
 909         wiphy_debug(hw->wiphy, "%s\n", __func__);
 910
 911         data->rx_filter = 0;
 912         if (*total_flags & FIF_PROMISC_IN_BSS)
 913                 data->rx_filter |= FIF_PROMISC_IN_BSS;
 914         if (*total_flags & FIF_ALLMULTI)
 915                 data->rx_filter |= FIF_ALLMULTI;
 916
 917         *total_flags = data->rx_filter;
 918 }
 919
 920 static void mac80211_hwsim_bss_info_changed(struct ieee80211_hw *hw,
 921                                             struct ieee80211_vif *vif,
 922                                             struct ieee80211_bss_conf *info,
 923                                             u32 changed)
 924 {
 925         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 926         struct mac80211_hwsim_data *data = hw->priv;
 927
 928         hwsim_check_magic(vif);
 929
 930         wiphy_debug(hw->wiphy, "%s(changed=0x%x)\n", __func__, changed);
 931
 932         if (changed & BSS_CHANGED_BSSID) {
 933                 wiphy_debug(hw->wiphy, "%s: BSSID changed: %pM\n",
 934                             __func__, info->bssid);
 935                 memcpy(vp->bssid, info->bssid, ETH_ALEN);
 936         }
 937
 938         if (changed & BSS_CHANGED_ASSOC) {
 939                 wiphy_debug(hw->wiphy, "  ASSOC: assoc=%d aid=%d\n",
 940                             info->assoc, info->aid);
 941                 vp->assoc = info->assoc;
 942                 vp->aid = info->aid;
 943         }
 944
 945         if (changed & BSS_CHANGED_BEACON_INT) {
 946                 wiphy_debug(hw->wiphy, "  BCNINT: %d\n", info->beacon_int);
 947                 data->beacon_int = 1024 * info->beacon_int / 1000 * HZ / 1000;
 948                 if (WARN_ON(!data->beacon_int))
 949                         data->beacon_int = 1;
 950                 if (data->started)
 951                         mod_timer(&data->beacon_timer,
 952                                   jiffies + data->beacon_int);
 953         }
 954
 955         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
 956                 wiphy_debug(hw->wiphy, "  ERP_CTS_PROT: %d\n",
 957                             info->use_cts_prot);
 958         }
 959
 960         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
 961                 wiphy_debug(hw->wiphy, "  ERP_PREAMBLE: %d\n",
 962                             info->use_short_preamble);
 963         }
 964
 965         if (changed & BSS_CHANGED_ERP_SLOT) {
 966                 wiphy_debug(hw->wiphy, "  ERP_SLOT: %d\n", info->use_short_slot);
 967         }
 968
 969         if (changed & BSS_CHANGED_HT) {
 970                 wiphy_debug(hw->wiphy, "  HT: op_mode=0x%x, chantype=%s\n",
 971                             info->ht_operation_mode,
 972                             hwsim_chantypes[info->channel_type]);
 973         }
 974
 975         if (changed & BSS_CHANGED_BASIC_RATES) {
 976                 wiphy_debug(hw->wiphy, "  BASIC_RATES: 0x%llx\n",
 977                             (unsigned long long) info->basic_rates);
 978         }
 979 }
 980
 981 static int mac80211_hwsim_sta_add(struct ieee80211_hw *hw,
 982                                   struct ieee80211_vif *vif,
 983                                   struct ieee80211_sta *sta)
 984 {
 985         hwsim_check_magic(vif);
 986         hwsim_set_sta_magic(sta);
 987
 988         return 0;
 989 }
 990
 991 static int mac80211_hwsim_sta_remove(struct ieee80211_hw *hw,
 992                                      struct ieee80211_vif *vif,
 993                                      struct ieee80211_sta *sta)
 994 {
 995         hwsim_check_magic(vif);
 996         hwsim_clear_sta_magic(sta);
 997
 998         return 0;
 999 }
1000
1001 static void mac80211_hwsim_sta_notify(struct ieee80211_hw *hw,
1002                                       struct ieee80211_vif *vif,
1003                                       enum sta_notify_cmd cmd,
1004                                       struct ieee80211_sta *sta)
1005 {
1006         hwsim_check_magic(vif);
1007
1008         switch (cmd) {
1009         case STA_NOTIFY_SLEEP:
1010         case STA_NOTIFY_AWAKE:
1011                 /* TODO: make good use of these flags */
1012                 break;
1013         default:
1014                 WARN(1, "Invalid sta notify: %d\n", cmd);
1015                 break;
1016         }
1017 }
1018
1019 static int mac80211_hwsim_set_tim(struct ieee80211_hw *hw,
1020                                   struct ieee80211_sta *sta,
1021                                   bool set)
1022 {
1023         hwsim_check_sta_magic(sta);
1024         return 0;
1025 }
1026
1027 static int mac80211_hwsim_conf_tx(
1028         struct ieee80211_hw *hw,
1029         struct ieee80211_vif *vif, u16 queue,
1030         const struct ieee80211_tx_queue_params *params)
1031 {
1032         wiphy_debug(hw->wiphy,
1033                     "%s (queue=%d txop=%d cw_min=%d cw_max=%d aifs=%d)\n",
1034                     __func__, queue,
1035                     params->txop, params->cw_min,
1036                     params->cw_max, params->aifs);
1037         return 0;
1038 }
1039
1040 static int mac80211_hwsim_get_survey(
1041         struct ieee80211_hw *hw, int idx,
1042         struct survey_info *survey)
1043 {
1044         struct ieee80211_conf *conf = &hw->conf;
1045
1046         wiphy_debug(hw->wiphy, "%s (idx=%d)\n", __func__, idx);
1047
1048         if (idx != 0)
1049                 return -ENOENT;
1050
1051         /* Current channel */
1052         survey->channel = conf->channel;
1053
1054         /*
1055          * Magically conjured noise level --- this is only ok for simulated hardware.
1056          *
1057          * A real driver which cannot determine the real channel noise MUST NOT
1058          * report any noise, especially not a magically conjured one :-)
1059          */
1060         survey->filled = SURVEY_INFO_NOISE_DBM;
1061         survey->noise = -92;
1062
1063         return 0;
1064 }
1065
1066 #ifdef CONFIG_NL80211_TESTMODE
1067 /*
1068  * This section contains example code for using netlink
1069  * attributes with the testmode command in nl80211.
1070  */
1071
1072 /* These enums need to be kept in sync with userspace */
1073 enum hwsim_testmode_attr {
1074         __HWSIM_TM_ATTR_INVALID = 0,
1075         HWSIM_TM_ATTR_CMD       = 1,
1076         HWSIM_TM_ATTR_PS        = 2,
1077
1078         /* keep last */
1079         __HWSIM_TM_ATTR_AFTER_LAST,
1080         HWSIM_TM_ATTR_MAX       = __HWSIM_TM_ATTR_AFTER_LAST - 1
1081 };
1082
1083 enum hwsim_testmode_cmd {
1084         HWSIM_TM_CMD_SET_PS             = 0,
1085         HWSIM_TM_CMD_GET_PS             = 1,
1086 };
1087
1088 static const struct nla_policy hwsim_testmode_policy[HWSIM_TM_ATTR_MAX + 1] = {
1089         [HWSIM_TM_ATTR_CMD] = { .type = NLA_U32 },
1090         [HWSIM_TM_ATTR_PS] = { .type = NLA_U32 },
1091 };
1092
1093 static int hwsim_fops_ps_write(void *dat, u64 val);
1094
1095 static int mac80211_hwsim_testmode_cmd(struct ieee80211_hw *hw,
1096                                        void *data, int len)
1097 {
1098         struct mac80211_hwsim_data *hwsim = hw->priv;
1099         struct nlattr *tb[HWSIM_TM_ATTR_MAX + 1];
1100         struct sk_buff *skb;
1101         int err, ps;
1102
1103         err = nla_parse(tb, HWSIM_TM_ATTR_MAX, data, len,
1104                         hwsim_testmode_policy);
1105         if (err)
1106                 return err;
1107
1108         if (!tb[HWSIM_TM_ATTR_CMD])
1109                 return -EINVAL;
1110
1111         switch (nla_get_u32(tb[HWSIM_TM_ATTR_CMD])) {
1112         case HWSIM_TM_CMD_SET_PS:
1113                 if (!tb[HWSIM_TM_ATTR_PS])
1114                         return -EINVAL;
1115                 ps = nla_get_u32(tb[HWSIM_TM_ATTR_PS]);
1116                 return hwsim_fops_ps_write(hwsim, ps);
1117         case HWSIM_TM_CMD_GET_PS:
1118                 skb = cfg80211_testmode_alloc_reply_skb(hw->wiphy,
1119                                                 nla_total_size(sizeof(u32)));
1120                 if (!skb)
1121                         return -ENOMEM;
1122                 if (nla_put_u32(skb, HWSIM_TM_ATTR_PS, hwsim->ps))
1123                         goto nla_put_failure;
1124                 return cfg80211_testmode_reply(skb);
1125         default:
1126                 return -EOPNOTSUPP;
1127         }
1128
1129  nla_put_failure:
1130         kfree_skb(skb);
1131         return -ENOBUFS;
1132 }
1133 #endif
1134
1135 static int mac80211_hwsim_ampdu_action(struct ieee80211_hw *hw,
1136                                        struct ieee80211_vif *vif,
1137                                        enum ieee80211_ampdu_mlme_action action,
1138                                        struct ieee80211_sta *sta, u16 tid, u16 *ssn,
1139                                        u8 buf_size)
1140 {
1141         switch (action) {
1142         case IEEE80211_AMPDU_TX_START:
1143                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1144                 break;
1145         case IEEE80211_AMPDU_TX_STOP:
1146                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1147                 break;
1148         case IEEE80211_AMPDU_TX_OPERATIONAL:
1149                 break;
1150         case IEEE80211_AMPDU_RX_START:
1151         case IEEE80211_AMPDU_RX_STOP:
1152                 break;
1153         default:
1154                 return -EOPNOTSUPP;
1155         }
1156
1157         return 0;
1158 }
1159
1160 static void mac80211_hwsim_flush(struct ieee80211_hw *hw, bool drop)
1161 {
1162         /* Not implemented, queues only on kernel side */
1163 }
1164
1165 struct hw_scan_done {
1166         struct delayed_work w;
1167         struct ieee80211_hw *hw;
1168 };
1169
1170 static void hw_scan_done(struct work_struct *work)
1171 {
1172         struct hw_scan_done *hsd =
1173                 container_of(work, struct hw_scan_done, w.work);
1174
1175         ieee80211_scan_completed(hsd->hw, false);
1176         kfree(hsd);
1177 }
1178
1179 static int mac80211_hwsim_hw_scan(struct ieee80211_hw *hw,
1180                                   struct ieee80211_vif *vif,
1181                                   struct cfg80211_scan_request *req)
1182 {
1183         struct hw_scan_done *hsd = kzalloc(sizeof(*hsd), GFP_KERNEL);
1184         int i;
1185
1186         if (!hsd)
1187                 return -ENOMEM;
1188
1189         hsd->hw = hw;
1190         INIT_DELAYED_WORK(&hsd->w, hw_scan_done);
1191
1192         printk(KERN_DEBUG "hwsim hw_scan request\n");
1193         for (i = 0; i < req->n_channels; i++)
1194                 printk(KERN_DEBUG "hwsim hw_scan freq %d\n",
1195                         req->channels[i]->center_freq);
1196         print_hex_dump(KERN_DEBUG, "scan IEs: ", DUMP_PREFIX_OFFSET,
1197                         16, 1, req->ie, req->ie_len, 1);
1198
1199         ieee80211_queue_delayed_work(hw, &hsd->w, 2 * HZ);
1200
1201         return 0;
1202 }
1203
1204 static void mac80211_hwsim_sw_scan(struct ieee80211_hw *hw)
1205 {
1206         struct mac80211_hwsim_data *hwsim = hw->priv;
1207
1208         mutex_lock(&hwsim->mutex);
1209
1210         if (hwsim->scanning) {
1211                 printk(KERN_DEBUG "two hwsim sw_scans detected!\n");
1212                 goto out;
1213         }
1214
1215         printk(KERN_DEBUG "hwsim sw_scan request, prepping stuff\n");
1216         hwsim->scanning = true;
1217
1218 out:
1219         mutex_unlock(&hwsim->mutex);
1220 }
1221
1222 static void mac80211_hwsim_sw_scan_complete(struct ieee80211_hw *hw)
1223 {
1224         struct mac80211_hwsim_data *hwsim = hw->priv;
1225
1226         mutex_lock(&hwsim->mutex);
1227
1228         printk(KERN_DEBUG "hwsim sw_scan_complete\n");
1229         hwsim->scanning = false;
1230
1231         mutex_unlock(&hwsim->mutex);
1232 }
1233
1234 static struct ieee80211_ops mac80211_hwsim_ops =
1235 {
1236         .tx = mac80211_hwsim_tx,
1237         .start = mac80211_hwsim_start,
1238         .stop = mac80211_hwsim_stop,
1239         .add_interface = mac80211_hwsim_add_interface,
1240         .change_interface = mac80211_hwsim_change_interface,
1241         .remove_interface = mac80211_hwsim_remove_interface,
1242         .config = mac80211_hwsim_config,
1243         .configure_filter = mac80211_hwsim_configure_filter,
1244         .bss_info_changed = mac80211_hwsim_bss_info_changed,
1245         .sta_add = mac80211_hwsim_sta_add,
1246         .sta_remove = mac80211_hwsim_sta_remove,
1247         .sta_notify = mac80211_hwsim_sta_notify,
1248         .set_tim = mac80211_hwsim_set_tim,
1249         .conf_tx = mac80211_hwsim_conf_tx,
1250         .get_survey = mac80211_hwsim_get_survey,
1251         CFG80211_TESTMODE_CMD(mac80211_hwsim_testmode_cmd)
1252         .ampdu_action = mac80211_hwsim_ampdu_action,
1253         .sw_scan_start = mac80211_hwsim_sw_scan,
1254         .sw_scan_complete = mac80211_hwsim_sw_scan_complete,
1255         .flush = mac80211_hwsim_flush,
1256         .get_tsf = mac80211_hwsim_get_tsf,
1257         .set_tsf = mac80211_hwsim_set_tsf,
1258 };
1259
1260
1261 static void mac80211_hwsim_free(void)
1262 {
1263         struct list_head tmplist, *i, *tmp;
1264         struct mac80211_hwsim_data *data, *tmpdata;
1265
1266         INIT_LIST_HEAD(&tmplist);
1267
1268         spin_lock_bh(&hwsim_radio_lock);
1269         list_for_each_safe(i, tmp, &hwsim_radios)
1270                 list_move(i, &tmplist);
1271         spin_unlock_bh(&hwsim_radio_lock);
1272
1273         list_for_each_entry_safe(data, tmpdata, &tmplist, list) {
1274                 debugfs_remove(data->debugfs_group);
1275                 debugfs_remove(data->debugfs_ps);
1276                 debugfs_remove(data->debugfs);
1277                 ieee80211_unregister_hw(data->hw);
1278                 device_unregister(data->dev);
1279                 ieee80211_free_hw(data->hw);
1280         }
1281         class_destroy(hwsim_class);
1282 }
1283
1284
1285 static struct device_driver mac80211_hwsim_driver = {
1286         .name = "mac80211_hwsim"
1287 };
1288
1289 static const struct net_device_ops hwsim_netdev_ops = {
1290         .ndo_start_xmit         = hwsim_mon_xmit,
1291         .ndo_change_mtu         = eth_change_mtu,
1292         .ndo_set_mac_address    = eth_mac_addr,
1293         .ndo_validate_addr      = eth_validate_addr,
1294 };
1295
1296 static void hwsim_mon_setup(struct net_device *dev)
1297 {
1298         dev->netdev_ops = &hwsim_netdev_ops;
1299         dev->destructor = free_netdev;
1300         ether_setup(dev);
1301         dev->tx_queue_len = 0;
1302         dev->type = ARPHRD_IEEE80211_RADIOTAP;
1303         memset(dev->dev_addr, 0, ETH_ALEN);
1304         dev->dev_addr[0] = 0x12;
1305 }
1306
1307
1308 static void hwsim_send_ps_poll(void *dat, u8 *mac, struct ieee80211_vif *vif)
1309 {
1310         struct mac80211_hwsim_data *data = dat;
1311         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
1312         struct sk_buff *skb;
1313         struct ieee80211_pspoll *pspoll;
1314         u32 _pid;
1315
1316         if (!vp->assoc)
1317                 return;
1318
1319         wiphy_debug(data->hw->wiphy,
1320                     "%s: send PS-Poll to %pM for aid %d\n",
1321                     __func__, vp->bssid, vp->aid);
1322
1323         skb = dev_alloc_skb(sizeof(*pspoll));
1324         if (!skb)
1325                 return;
1326         pspoll = (void *) skb_put(skb, sizeof(*pspoll));
1327         pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
1328                                             IEEE80211_STYPE_PSPOLL |
1329                                             IEEE80211_FCTL_PM);
1330         pspoll->aid = cpu_to_le16(0xc000 | vp->aid);
1331         memcpy(pspoll->bssid, vp->bssid, ETH_ALEN);
1332         memcpy(pspoll->ta, mac, ETH_ALEN);
1333
1334         /* wmediumd mode check */
1335         _pid = ACCESS_ONCE(wmediumd_pid);
1336
1337         if (_pid)
1338                 return mac80211_hwsim_tx_frame_nl(data->hw, skb, _pid);
1339
1340         if (!mac80211_hwsim_tx_frame_no_nl(data->hw, skb))
1341                 printk(KERN_DEBUG "%s: PS-poll frame not ack'ed\n", __func__);
1342         dev_kfree_skb(skb);
1343 }
1344
1345
1346 static void hwsim_send_nullfunc(struct mac80211_hwsim_data *data, u8 *mac,
1347                                 struct ieee80211_vif *vif, int ps)
1348 {
1349         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
1350         struct sk_buff *skb;
1351         struct ieee80211_hdr *hdr;
1352         u32 _pid;
1353
1354         if (!vp->assoc)
1355                 return;
1356
1357         wiphy_debug(data->hw->wiphy,
1358                     "%s: send data::nullfunc to %pM ps=%d\n",
1359                     __func__, vp->bssid, ps);
1360
1361         skb = dev_alloc_skb(sizeof(*hdr));
1362         if (!skb)
1363                 return;
1364         hdr = (void *) skb_put(skb, sizeof(*hdr) - ETH_ALEN);
1365         hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
1366                                          IEEE80211_STYPE_NULLFUNC |
1367                                          (ps ? IEEE80211_FCTL_PM : 0));
1368         hdr->duration_id = cpu_to_le16(0);
1369         memcpy(hdr->addr1, vp->bssid, ETH_ALEN);
1370         memcpy(hdr->addr2, mac, ETH_ALEN);
1371         memcpy(hdr->addr3, vp->bssid, ETH_ALEN);
1372
1373         /* wmediumd mode check */
1374         _pid = ACCESS_ONCE(wmediumd_pid);
1375
1376         if (_pid)
1377                 return mac80211_hwsim_tx_frame_nl(data->hw, skb, _pid);
1378
1379         if (!mac80211_hwsim_tx_frame_no_nl(data->hw, skb))
1380                 printk(KERN_DEBUG "%s: nullfunc frame not ack'ed\n", __func__);
1381         dev_kfree_skb(skb);
1382 }
1383
1384
1385 static void hwsim_send_nullfunc_ps(void *dat, u8 *mac,
1386                                    struct ieee80211_vif *vif)
1387 {
1388         struct mac80211_hwsim_data *data = dat;
1389         hwsim_send_nullfunc(data, mac, vif, 1);
1390 }
1391
1392
1393 static void hwsim_send_nullfunc_no_ps(void *dat, u8 *mac,
1394                                       struct ieee80211_vif *vif)
1395 {
1396         struct mac80211_hwsim_data *data = dat;
1397         hwsim_send_nullfunc(data, mac, vif, 0);
1398 }
1399
1400
1401 static int hwsim_fops_ps_read(void *dat, u64 *val)
1402 {
1403         struct mac80211_hwsim_data *data = dat;
1404         *val = data->ps;
1405         return 0;
1406 }
1407
1408 static int hwsim_fops_ps_write(void *dat, u64 val)
1409 {
1410         struct mac80211_hwsim_data *data = dat;
1411         enum ps_mode old_ps;
1412
1413         if (val != PS_DISABLED && val != PS_ENABLED && val != PS_AUTO_POLL &&
1414             val != PS_MANUAL_POLL)
1415                 return -EINVAL;
1416
1417         old_ps = data->ps;
1418         data->ps = val;
1419
1420         if (val == PS_MANUAL_POLL) {
1421                 ieee80211_iterate_active_interfaces(data->hw,
1422                                                     hwsim_send_ps_poll, data);
1423                 data->ps_poll_pending = true;
1424         } else if (old_ps == PS_DISABLED && val != PS_DISABLED) {
1425                 ieee80211_iterate_active_interfaces(data->hw,
1426                                                     hwsim_send_nullfunc_ps,
1427                                                     data);
1428         } else if (old_ps != PS_DISABLED && val == PS_DISABLED) {
1429                 ieee80211_iterate_active_interfaces(data->hw,
1430                                                     hwsim_send_nullfunc_no_ps,
1431                                                     data);
1432         }
1433
1434         return 0;
1435 }
1436
1437 DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_ps, hwsim_fops_ps_read, hwsim_fops_ps_write,
1438                         "%llu\n");
1439
1440
1441 static int hwsim_fops_group_read(void *dat, u64 *val)
1442 {
1443         struct mac80211_hwsim_data *data = dat;
1444         *val = data->group;
1445         return 0;
1446 }
1447
1448 static int hwsim_fops_group_write(void *dat, u64 val)
1449 {
1450         struct mac80211_hwsim_data *data = dat;
1451         data->group = val;
1452         return 0;
1453 }
1454
1455 DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_group,
1456                         hwsim_fops_group_read, hwsim_fops_group_write,
1457                         "%llx\n");
1458
1459 static struct mac80211_hwsim_data *get_hwsim_data_ref_from_addr(
1460                              struct mac_address *addr)
1461 {
1462         struct mac80211_hwsim_data *data;
1463         bool _found = false;
1464
1465         spin_lock_bh(&hwsim_radio_lock);
1466         list_for_each_entry(data, &hwsim_radios, list) {
1467                 if (memcmp(data->addresses[1].addr, addr,
1468                           sizeof(struct mac_address)) == 0) {
1469                         _found = true;
1470                         break;
1471                 }
1472         }
1473         spin_unlock_bh(&hwsim_radio_lock);
1474
1475         if (!_found)
1476                 return NULL;
1477
1478         return data;
1479 }
1480
1481 static int hwsim_tx_info_frame_received_nl(struct sk_buff *skb_2,
1482                                            struct genl_info *info)
1483 {
1484
1485         struct ieee80211_hdr *hdr;
1486         struct mac80211_hwsim_data *data2;
1487         struct ieee80211_tx_info *txi;
1488         struct hwsim_tx_rate *tx_attempts;
1489         struct sk_buff __user *ret_skb;
1490         struct sk_buff *skb, *tmp;
1491         struct mac_address *src;
1492         unsigned int hwsim_flags;
1493
1494         int i;
1495         bool found = false;
1496
1497         if (!info->attrs[HWSIM_ATTR_ADDR_TRANSMITTER] ||
1498            !info->attrs[HWSIM_ATTR_FLAGS] ||
1499            !info->attrs[HWSIM_ATTR_COOKIE] ||
1500            !info->attrs[HWSIM_ATTR_TX_INFO])
1501                 goto out;
1502
1503         src = (struct mac_address *)nla_data(
1504                                    info->attrs[HWSIM_ATTR_ADDR_TRANSMITTER]);
1505         hwsim_flags = nla_get_u32(info->attrs[HWSIM_ATTR_FLAGS]);
1506
1507         ret_skb = (struct sk_buff __user *)
1508                   (unsigned long) nla_get_u64(info->attrs[HWSIM_ATTR_COOKIE]);
1509
1510         data2 = get_hwsim_data_ref_from_addr(src);
1511
1512         if (data2 == NULL)
1513                 goto out;
1514
1515         /* look for the skb matching the cookie passed back from user */
1516         skb_queue_walk_safe(&data2->pending, skb, tmp) {
1517                 if (skb == ret_skb) {
1518                         skb_unlink(skb, &data2->pending);
1519                         found = true;
1520                         break;
1521                 }
1522         }
1523
1524         /* not found */
1525         if (!found)
1526                 goto out;
1527
1528         /* Tx info received because the frame was broadcasted on user space,
1529          so we get all the necessary info: tx attempts and skb control buff */
1530
1531         tx_attempts = (struct hwsim_tx_rate *)nla_data(
1532                        info->attrs[HWSIM_ATTR_TX_INFO]);
1533
1534         /* now send back TX status */
1535         txi = IEEE80211_SKB_CB(skb);
1536
1537         if (txi->control.vif)
1538                 hwsim_check_magic(txi->control.vif);
1539         if (txi->control.sta)
1540                 hwsim_check_sta_magic(txi->control.sta);
1541
1542         ieee80211_tx_info_clear_status(txi);
1543
1544         for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
1545                 txi->status.rates[i].idx = tx_attempts[i].idx;
1546                 txi->status.rates[i].count = tx_attempts[i].count;
1547                 /*txi->status.rates[i].flags = 0;*/
1548         }
1549
1550         txi->status.ack_signal = nla_get_u32(info->attrs[HWSIM_ATTR_SIGNAL]);
1551
1552         if (!(hwsim_flags & HWSIM_TX_CTL_NO_ACK) &&
1553            (hwsim_flags & HWSIM_TX_STAT_ACK)) {
1554                 if (skb->len >= 16) {
1555                         hdr = (struct ieee80211_hdr *) skb->data;
1556                         mac80211_hwsim_monitor_ack(data2->hw, hdr->addr2);
1557                 }
1558                 txi->flags |= IEEE80211_TX_STAT_ACK;
1559         }
1560         ieee80211_tx_status_irqsafe(data2->hw, skb);
1561         return 0;
1562 out:
1563         return -EINVAL;
1564
1565 }
1566
1567 static int hwsim_cloned_frame_received_nl(struct sk_buff *skb_2,
1568                                           struct genl_info *info)
1569 {
1570
1571         struct mac80211_hwsim_data  *data2;
1572         struct ieee80211_rx_status rx_status;
1573         struct mac_address *dst;
1574         int frame_data_len;
1575         char *frame_data;
1576         struct sk_buff *skb = NULL;
1577
1578         if (!info->attrs[HWSIM_ATTR_ADDR_RECEIVER] ||
1579            !info->attrs[HWSIM_ATTR_FRAME] ||
1580            !info->attrs[HWSIM_ATTR_RX_RATE] ||
1581            !info->attrs[HWSIM_ATTR_SIGNAL])
1582                 goto out;
1583
1584         dst = (struct mac_address *)nla_data(
1585                                    info->attrs[HWSIM_ATTR_ADDR_RECEIVER]);
1586
1587         frame_data_len = nla_len(info->attrs[HWSIM_ATTR_FRAME]);
1588         frame_data = (char *)nla_data(info->attrs[HWSIM_ATTR_FRAME]);
1589
1590         /* Allocate new skb here */
1591         skb = alloc_skb(frame_data_len, GFP_KERNEL);
1592         if (skb == NULL)
1593                 goto err;
1594
1595         if (frame_data_len <= IEEE80211_MAX_DATA_LEN) {
1596                 /* Copy the data */
1597                 memcpy(skb_put(skb, frame_data_len), frame_data,
1598                        frame_data_len);
1599         } else
1600                 goto err;
1601
1602         data2 = get_hwsim_data_ref_from_addr(dst);
1603
1604         if (data2 == NULL)
1605                 goto out;
1606
1607         /* check if radio is configured properly */
1608
1609         if (data2->idle || !data2->started || !data2->channel)
1610                 goto out;
1611
1612         /*A frame is received from user space*/
1613         memset(&rx_status, 0, sizeof(rx_status));
1614         rx_status.freq = data2->channel->center_freq;
1615         rx_status.band = data2->channel->band;
1616         rx_status.rate_idx = nla_get_u32(info->attrs[HWSIM_ATTR_RX_RATE]);
1617         rx_status.signal = nla_get_u32(info->attrs[HWSIM_ATTR_SIGNAL]);
1618
1619         memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
1620         ieee80211_rx_irqsafe(data2->hw, skb);
1621
1622         return 0;
1623 err:
1624         printk(KERN_DEBUG "mac80211_hwsim: error occurred in %s\n", __func__);
1625         goto out;
1626 out:
1627         dev_kfree_skb(skb);
1628         return -EINVAL;
1629 }
1630
1631 static int hwsim_register_received_nl(struct sk_buff *skb_2,
1632                                       struct genl_info *info)
1633 {
1634         if (info == NULL)
1635                 goto out;
1636
1637         wmediumd_pid = info->snd_pid;
1638
1639         printk(KERN_DEBUG "mac80211_hwsim: received a REGISTER, "
1640                "switching to wmediumd mode with pid %d\n", info->snd_pid);
1641
1642         return 0;
1643 out:
1644         printk(KERN_DEBUG "mac80211_hwsim: error occurred in %s\n", __func__);
1645         return -EINVAL;
1646 }
1647
1648 /* Generic Netlink operations array */
1649 static struct genl_ops hwsim_ops[] = {
1650         {
1651                 .cmd = HWSIM_CMD_REGISTER,
1652                 .policy = hwsim_genl_policy,
1653                 .doit = hwsim_register_received_nl,
1654                 .flags = GENL_ADMIN_PERM,
1655         },
1656         {
1657                 .cmd = HWSIM_CMD_FRAME,
1658                 .policy = hwsim_genl_policy,
1659                 .doit = hwsim_cloned_frame_received_nl,
1660         },
1661         {
1662                 .cmd = HWSIM_CMD_TX_INFO_FRAME,
1663                 .policy = hwsim_genl_policy,
1664                 .doit = hwsim_tx_info_frame_received_nl,
1665         },
1666 };
1667
1668 static int mac80211_hwsim_netlink_notify(struct notifier_block *nb,
1669                                          unsigned long state,
1670                                          void *_notify)
1671 {
1672         struct netlink_notify *notify = _notify;
1673
1674         if (state != NETLINK_URELEASE)
1675                 return NOTIFY_DONE;
1676
1677         if (notify->pid == wmediumd_pid) {
1678                 printk(KERN_INFO "mac80211_hwsim: wmediumd released netlink"
1679                        " socket, switching to perfect channel medium\n");
1680                 wmediumd_pid = 0;
1681         }
1682         return NOTIFY_DONE;
1683
1684 }
1685
1686 static struct notifier_block hwsim_netlink_notifier = {
1687         .notifier_call = mac80211_hwsim_netlink_notify,
1688 };
1689
1690 static int hwsim_init_netlink(void)
1691 {
1692         int rc;
1693         printk(KERN_INFO "mac80211_hwsim: initializing netlink\n");
1694
1695         rc = genl_register_family_with_ops(&hwsim_genl_family,
1696                 hwsim_ops, ARRAY_SIZE(hwsim_ops));
1697         if (rc)
1698                 goto failure;
1699
1700         rc = netlink_register_notifier(&hwsim_netlink_notifier);
1701         if (rc)
1702                 goto failure;
1703
1704         return 0;
1705
1706 failure:
1707         printk(KERN_DEBUG "mac80211_hwsim: error occurred in %s\n", __func__);
1708         return -EINVAL;
1709 }
1710
1711 static void hwsim_exit_netlink(void)
1712 {
1713         int ret;
1714
1715         printk(KERN_INFO "mac80211_hwsim: closing netlink\n");
1716         /* unregister the notifier */
1717         netlink_unregister_notifier(&hwsim_netlink_notifier);
1718         /* unregister the family */
1719         ret = genl_unregister_family(&hwsim_genl_family);
1720         if (ret)
1721                 printk(KERN_DEBUG "mac80211_hwsim: "
1722                        "unregister family %i\n", ret);
1723 }
1724
1725 static const struct ieee80211_iface_limit hwsim_if_limits[] = {
1726         { .max = 1, .types = BIT(NL80211_IFTYPE_ADHOC) },
1727         { .max = 2048,  .types = BIT(NL80211_IFTYPE_STATION) |
1728                                  BIT(NL80211_IFTYPE_P2P_CLIENT) |
1729 #ifdef CONFIG_MAC80211_MESH
1730                                  BIT(NL80211_IFTYPE_MESH_POINT) |
1731 #endif
1732                                  BIT(NL80211_IFTYPE_AP) |
1733                                  BIT(NL80211_IFTYPE_P2P_GO) },
1734 };
1735
1736 static const struct ieee80211_iface_combination hwsim_if_comb = {
1737         .limits = hwsim_if_limits,
1738         .n_limits = ARRAY_SIZE(hwsim_if_limits),
1739         .max_interfaces = 2048,
1740         .num_different_channels = 1,
1741 };
1742
1743 static int __init init_mac80211_hwsim(void)
1744 {
1745         int i, err = 0;
1746         u8 addr[ETH_ALEN];
1747         struct mac80211_hwsim_data *data;
1748         struct ieee80211_hw *hw;
1749         enum ieee80211_band band;
1750
1751         if (radios < 1 || radios > 100)
1752                 return -EINVAL;
1753
1754         if (fake_hw_scan) {
1755                 mac80211_hwsim_ops.hw_scan = mac80211_hwsim_hw_scan;
1756                 mac80211_hwsim_ops.sw_scan_start = NULL;
1757                 mac80211_hwsim_ops.sw_scan_complete = NULL;
1758         }
1759
1760         spin_lock_init(&hwsim_radio_lock);
1761         INIT_LIST_HEAD(&hwsim_radios);
1762
1763         hwsim_class = class_create(THIS_MODULE, "mac80211_hwsim");
1764         if (IS_ERR(hwsim_class))
1765                 return PTR_ERR(hwsim_class);
1766
1767         memset(addr, 0, ETH_ALEN);
1768         addr[0] = 0x02;
1769
1770         for (i = 0; i < radios; i++) {
1771                 printk(KERN_DEBUG "mac80211_hwsim: Initializing radio %d\n",
1772                        i);
1773                 hw = ieee80211_alloc_hw(sizeof(*data), &mac80211_hwsim_ops);
1774                 if (!hw) {
1775                         printk(KERN_DEBUG "mac80211_hwsim: ieee80211_alloc_hw "
1776                                "failed\n");
1777                         err = -ENOMEM;
1778                         goto failed;
1779                 }
1780                 data = hw->priv;
1781                 data->hw = hw;
1782
1783                 data->dev = device_create(hwsim_class, NULL, 0, hw,
1784                                           "hwsim%d", i);
1785                 if (IS_ERR(data->dev)) {
1786                         printk(KERN_DEBUG
1787                                "mac80211_hwsim: device_create "
1788                                "failed (%ld)\n", PTR_ERR(data->dev));
1789                         err = -ENOMEM;
1790                         goto failed_drvdata;
1791                 }
1792                 data->dev->driver = &mac80211_hwsim_driver;
1793                 skb_queue_head_init(&data->pending);
1794
1795                 SET_IEEE80211_DEV(hw, data->dev);
1796                 addr[3] = i >> 8;
1797                 addr[4] = i;
1798                 memcpy(data->addresses[0].addr, addr, ETH_ALEN);
1799                 memcpy(data->addresses[1].addr, addr, ETH_ALEN);
1800                 data->addresses[1].addr[0] |= 0x40;
1801                 hw->wiphy->n_addresses = 2;
1802                 hw->wiphy->addresses = data->addresses;
1803
1804                 hw->wiphy->iface_combinations = &hwsim_if_comb;
1805                 hw->wiphy->n_iface_combinations = 1;
1806
1807                 if (fake_hw_scan) {
1808                         hw->wiphy->max_scan_ssids = 255;
1809                         hw->wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1810                 }
1811
1812                 hw->channel_change_time = 1;
1813                 hw->queues = 4;
1814                 hw->wiphy->interface_modes =
1815                         BIT(NL80211_IFTYPE_STATION) |
1816                         BIT(NL80211_IFTYPE_AP) |
1817                         BIT(NL80211_IFTYPE_P2P_CLIENT) |
1818                         BIT(NL80211_IFTYPE_P2P_GO) |
1819                         BIT(NL80211_IFTYPE_ADHOC) |
1820                         BIT(NL80211_IFTYPE_MESH_POINT);
1821
1822                 hw->flags = IEEE80211_HW_MFP_CAPABLE |
1823                             IEEE80211_HW_SIGNAL_DBM |
1824                             IEEE80211_HW_SUPPORTS_STATIC_SMPS |
1825                             IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
1826                             IEEE80211_HW_AMPDU_AGGREGATION |
1827                             IEEE80211_HW_WANT_MONITOR_VIF;
1828
1829                 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS |
1830                                     WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
1831
1832                 /* ask mac80211 to reserve space for magic */
1833                 hw->vif_data_size = sizeof(struct hwsim_vif_priv);
1834                 hw->sta_data_size = sizeof(struct hwsim_sta_priv);
1835
1836                 memcpy(data->channels_2ghz, hwsim_channels_2ghz,
1837                         sizeof(hwsim_channels_2ghz));
1838                 memcpy(data->channels_5ghz, hwsim_channels_5ghz,
1839                         sizeof(hwsim_channels_5ghz));
1840                 memcpy(data->rates, hwsim_rates, sizeof(hwsim_rates));
1841
1842                 for (band = IEEE80211_BAND_2GHZ; band < IEEE80211_NUM_BANDS; band++) {
1843                         struct ieee80211_supported_band *sband = &data->bands[band];
1844                         switch (band) {
1845                         case IEEE80211_BAND_2GHZ:
1846                                 sband->channels = data->channels_2ghz;
1847                                 sband->n_channels =
1848                                         ARRAY_SIZE(hwsim_channels_2ghz);
1849                                 sband->bitrates = data->rates;
1850                                 sband->n_bitrates = ARRAY_SIZE(hwsim_rates);
1851                                 break;
1852                         case IEEE80211_BAND_5GHZ:
1853                                 sband->channels = data->channels_5ghz;
1854                                 sband->n_channels =
1855                                         ARRAY_SIZE(hwsim_channels_5ghz);
1856                                 sband->bitrates = data->rates + 4;
1857                                 sband->n_bitrates = ARRAY_SIZE(hwsim_rates) - 4;
1858                                 break;
1859                         default:
1860                                 break;
1861                         }
1862
1863                         sband->ht_cap.ht_supported = true;
1864                         sband->ht_cap.cap = IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
1865                                 IEEE80211_HT_CAP_GRN_FLD |
1866                                 IEEE80211_HT_CAP_SGI_40 |
1867                                 IEEE80211_HT_CAP_DSSSCCK40;
1868                         sband->ht_cap.ampdu_factor = 0x3;
1869                         sband->ht_cap.ampdu_density = 0x6;
1870                         memset(&sband->ht_cap.mcs, 0,
1871                                sizeof(sband->ht_cap.mcs));
1872                         sband->ht_cap.mcs.rx_mask[0] = 0xff;
1873                         sband->ht_cap.mcs.rx_mask[1] = 0xff;
1874                         sband->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
1875
1876                         hw->wiphy->bands[band] = sband;
1877                 }
1878                 /* By default all radios are belonging to the first group */
1879                 data->group = 1;
1880                 mutex_init(&data->mutex);
1881
1882                 /* Enable frame retransmissions for lossy channels */
1883                 hw->max_rates = 4;
1884                 hw->max_rate_tries = 11;
1885
1886                 /* Work to be done prior to ieee80211_register_hw() */
1887                 switch (regtest) {
1888                 case HWSIM_REGTEST_DISABLED:
1889                 case HWSIM_REGTEST_DRIVER_REG_FOLLOW:
1890                 case HWSIM_REGTEST_DRIVER_REG_ALL:
1891                 case HWSIM_REGTEST_DIFF_COUNTRY:
1892                         /*
1893                          * Nothing to be done for driver regulatory domain
1894                          * hints prior to ieee80211_register_hw()
1895                          */
1896                         break;
1897                 case HWSIM_REGTEST_WORLD_ROAM:
1898                         if (i == 0) {
1899                                 hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY;
1900                                 wiphy_apply_custom_regulatory(hw->wiphy,
1901                                         &hwsim_world_regdom_custom_01);
1902                         }
1903                         break;
1904                 case HWSIM_REGTEST_CUSTOM_WORLD:
1905                         hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY;
1906                         wiphy_apply_custom_regulatory(hw->wiphy,
1907                                 &hwsim_world_regdom_custom_01);
1908                         break;
1909                 case HWSIM_REGTEST_CUSTOM_WORLD_2:
1910                         if (i == 0) {
1911                                 hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY;
1912                                 wiphy_apply_custom_regulatory(hw->wiphy,
1913                                         &hwsim_world_regdom_custom_01);
1914                         } else if (i == 1) {
1915                                 hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY;
1916                                 wiphy_apply_custom_regulatory(hw->wiphy,
1917                                         &hwsim_world_regdom_custom_02);
1918                         }
1919                         break;
1920                 case HWSIM_REGTEST_STRICT_ALL:
1921                         hw->wiphy->flags |= WIPHY_FLAG_STRICT_REGULATORY;
1922                         break;
1923                 case HWSIM_REGTEST_STRICT_FOLLOW:
1924                 case HWSIM_REGTEST_STRICT_AND_DRIVER_REG:
1925                         if (i == 0)
1926                                 hw->wiphy->flags |= WIPHY_FLAG_STRICT_REGULATORY;
1927                         break;
1928                 case HWSIM_REGTEST_ALL:
1929                         if (i == 0) {
1930                                 hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY;
1931                                 wiphy_apply_custom_regulatory(hw->wiphy,
1932                                         &hwsim_world_regdom_custom_01);
1933                         } else if (i == 1) {
1934                                 hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY;
1935                                 wiphy_apply_custom_regulatory(hw->wiphy,
1936                                         &hwsim_world_regdom_custom_02);
1937                         } else if (i == 4)
1938                                 hw->wiphy->flags |= WIPHY_FLAG_STRICT_REGULATORY;
1939                         break;
1940                 default:
1941                         break;
1942                 }
1943
1944                 /* give the regulatory workqueue a chance to run */
1945                 if (regtest)
1946                         schedule_timeout_interruptible(1);
1947                 err = ieee80211_register_hw(hw);
1948                 if (err < 0) {
1949                         printk(KERN_DEBUG "mac80211_hwsim: "
1950                                "ieee80211_register_hw failed (%d)\n", err);
1951                         goto failed_hw;
1952                 }
1953
1954                 /* Work to be done after to ieee80211_register_hw() */
1955                 switch (regtest) {
1956                 case HWSIM_REGTEST_WORLD_ROAM:
1957                 case HWSIM_REGTEST_DISABLED:
1958                         break;
1959                 case HWSIM_REGTEST_DRIVER_REG_FOLLOW:
1960                         if (!i)
1961                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
1962                         break;
1963                 case HWSIM_REGTEST_DRIVER_REG_ALL:
1964                 case HWSIM_REGTEST_STRICT_ALL:
1965                         regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
1966                         break;
1967                 case HWSIM_REGTEST_DIFF_COUNTRY:
1968                         if (i < ARRAY_SIZE(hwsim_alpha2s))
1969                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[i]);
1970                         break;
1971                 case HWSIM_REGTEST_CUSTOM_WORLD:
1972                 case HWSIM_REGTEST_CUSTOM_WORLD_2:
1973                         /*
1974                          * Nothing to be done for custom world regulatory
1975                          * domains after to ieee80211_register_hw
1976                          */
1977                         break;
1978                 case HWSIM_REGTEST_STRICT_FOLLOW:
1979                         if (i == 0)
1980                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
1981                         break;
1982                 case HWSIM_REGTEST_STRICT_AND_DRIVER_REG:
1983                         if (i == 0)
1984                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
1985                         else if (i == 1)
1986                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[1]);
1987                         break;
1988                 case HWSIM_REGTEST_ALL:
1989                         if (i == 2)
1990                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
1991                         else if (i == 3)
1992                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[1]);
1993                         else if (i == 4)
1994                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[2]);
1995                         break;
1996                 default:
1997                         break;
1998                 }
1999
2000                 wiphy_debug(hw->wiphy, "hwaddr %pm registered\n",
2001                             hw->wiphy->perm_addr);
2002
2003                 data->debugfs = debugfs_create_dir("hwsim",
2004                                                    hw->wiphy->debugfsdir);
2005                 data->debugfs_ps = debugfs_create_file("ps", 0666,
2006                                                        data->debugfs, data,
2007                                                        &hwsim_fops_ps);
2008                 data->debugfs_group = debugfs_create_file("group", 0666,
2009                                                         data->debugfs, data,
2010                                                         &hwsim_fops_group);
2011
2012                 setup_timer(&data->beacon_timer, mac80211_hwsim_beacon,
2013                             (unsigned long) hw);
2014
2015                 list_add_tail(&data->list, &hwsim_radios);
2016         }
2017
2018         hwsim_mon = alloc_netdev(0, "hwsim%d", hwsim_mon_setup);
2019         if (hwsim_mon == NULL)
2020                 goto failed;
2021
2022         rtnl_lock();
2023
2024         err = dev_alloc_name(hwsim_mon, hwsim_mon->name);
2025         if (err < 0)
2026                 goto failed_mon;
2027
2028
2029         err = register_netdevice(hwsim_mon);
2030         if (err < 0)
2031                 goto failed_mon;
2032
2033         rtnl_unlock();
2034
2035         err = hwsim_init_netlink();
2036         if (err < 0)
2037                 goto failed_nl;
2038
2039         return 0;
2040
2041 failed_nl:
2042         printk(KERN_DEBUG "mac_80211_hwsim: failed initializing netlink\n");
2043         return err;
2044
2045 failed_mon:
2046         rtnl_unlock();
2047         free_netdev(hwsim_mon);
2048         mac80211_hwsim_free();
2049         return err;
2050
2051 failed_hw:
2052         device_unregister(data->dev);
2053 failed_drvdata:
2054         ieee80211_free_hw(hw);
2055 failed:
2056         mac80211_hwsim_free();
2057         return err;
2058 }
2059
2060
2061 static void __exit exit_mac80211_hwsim(void)
2062 {
2063         printk(KERN_DEBUG "mac80211_hwsim: unregister radios\n");
2064
2065         hwsim_exit_netlink();
2066
2067         mac80211_hwsim_free();
2068         unregister_netdev(hwsim_mon);
2069 }
2070
2071
2072 module_init(init_mac80211_hwsim);
2073 module_exit(exit_mac80211_hwsim);