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/platform_device.h>
  29 #include <linux/debugfs.h>
  30 #include <linux/module.h>
  31 #include <linux/ktime.h>
  32 #include <net/genetlink.h>
  33 #include "mac80211_hwsim.h"
  34
  35 #define WARN_QUEUE 100
  36 #define MAX_QUEUE 200
  37
  38 MODULE_AUTHOR("Jouni Malinen");
  39 MODULE_DESCRIPTION("Software simulator of 802.11 radio(s) for mac80211");
  40 MODULE_LICENSE("GPL");
  41
  42 static u32 wmediumd_portid;
  43
  44 static int radios = 2;
  45 module_param(radios, int, 0444);
  46 MODULE_PARM_DESC(radios, "Number of simulated radios");
  47
  48 static int channels = 1;
  49 module_param(channels, int, 0444);
  50 MODULE_PARM_DESC(channels, "Number of concurrent channels");
  51
  52 static bool paged_rx = false;
  53 module_param(paged_rx, bool, 0644);
  54 MODULE_PARM_DESC(paged_rx, "Use paged SKBs for RX instead of linear ones");
  55
  56 static bool rctbl = false;
  57 module_param(rctbl, bool, 0444);
  58 MODULE_PARM_DESC(rctbl, "Handle rate control table");
  59
  60 /**
  61  * enum hwsim_regtest - the type of regulatory tests we offer
  62  *
  63  * These are the different values you can use for the regtest
  64  * module parameter. This is useful to help test world roaming
  65  * and the driver regulatory_hint() call and combinations of these.
  66  * If you want to do specific alpha2 regulatory domain tests simply
  67  * use the userspace regulatory request as that will be respected as
  68  * well without the need of this module parameter. This is designed
  69  * only for testing the driver regulatory request, world roaming
  70  * and all possible combinations.
  71  *
  72  * @HWSIM_REGTEST_DISABLED: No regulatory tests are performed,
  73  *      this is the default value.
  74  * @HWSIM_REGTEST_DRIVER_REG_FOLLOW: Used for testing the driver regulatory
  75  *      hint, only one driver regulatory hint will be sent as such the
  76  *      secondary radios are expected to follow.
  77  * @HWSIM_REGTEST_DRIVER_REG_ALL: Used for testing the driver regulatory
  78  *      request with all radios reporting the same regulatory domain.
  79  * @HWSIM_REGTEST_DIFF_COUNTRY: Used for testing the drivers calling
  80  *      different regulatory domains requests. Expected behaviour is for
  81  *      an intersection to occur but each device will still use their
  82  *      respective regulatory requested domains. Subsequent radios will
  83  *      use the resulting intersection.
  84  * @HWSIM_REGTEST_WORLD_ROAM: Used for testing the world roaming. We accomplish
  85  *      this by using a custom beacon-capable regulatory domain for the first
  86  *      radio. All other device world roam.
  87  * @HWSIM_REGTEST_CUSTOM_WORLD: Used for testing the custom world regulatory
  88  *      domain requests. All radios will adhere to this custom world regulatory
  89  *      domain.
  90  * @HWSIM_REGTEST_CUSTOM_WORLD_2: Used for testing 2 custom world regulatory
  91  *      domain requests. The first radio will adhere to the first custom world
  92  *      regulatory domain, the second one to the second custom world regulatory
  93  *      domain. All other devices will world roam.
  94  * @HWSIM_REGTEST_STRICT_FOLLOW_: Used for testing strict regulatory domain
  95  *      settings, only the first radio will send a regulatory domain request
  96  *      and use strict settings. The rest of the radios are expected to follow.
  97  * @HWSIM_REGTEST_STRICT_ALL: Used for testing strict regulatory domain
  98  *      settings. All radios will adhere to this.
  99  * @HWSIM_REGTEST_STRICT_AND_DRIVER_REG: Used for testing strict regulatory
 100  *      domain settings, combined with secondary driver regulatory domain
 101  *      settings. The first radio will get a strict regulatory domain setting
 102  *      using the first driver regulatory request and the second radio will use
 103  *      non-strict settings using the second driver regulatory request. All
 104  *      other devices should follow the intersection created between the
 105  *      first two.
 106  * @HWSIM_REGTEST_ALL: Used for testing every possible mix. You will need
 107  *      at least 6 radios for a complete test. We will test in this order:
 108  *      1 - driver custom world regulatory domain
 109  *      2 - second custom world regulatory domain
 110  *      3 - first driver regulatory domain request
 111  *      4 - second driver regulatory domain request
 112  *      5 - strict regulatory domain settings using the third driver regulatory
 113  *          domain request
 114  *      6 and on - should follow the intersection of the 3rd, 4rth and 5th radio
 115  *                 regulatory requests.
 116  */
 117 enum hwsim_regtest {
 118         HWSIM_REGTEST_DISABLED = 0,
 119         HWSIM_REGTEST_DRIVER_REG_FOLLOW = 1,
 120         HWSIM_REGTEST_DRIVER_REG_ALL = 2,
 121         HWSIM_REGTEST_DIFF_COUNTRY = 3,
 122         HWSIM_REGTEST_WORLD_ROAM = 4,
 123         HWSIM_REGTEST_CUSTOM_WORLD = 5,
 124         HWSIM_REGTEST_CUSTOM_WORLD_2 = 6,
 125         HWSIM_REGTEST_STRICT_FOLLOW = 7,
 126         HWSIM_REGTEST_STRICT_ALL = 8,
 127         HWSIM_REGTEST_STRICT_AND_DRIVER_REG = 9,
 128         HWSIM_REGTEST_ALL = 10,
 129 };
 130
 131 /* Set to one of the HWSIM_REGTEST_* values above */
 132 static int regtest = HWSIM_REGTEST_DISABLED;
 133 module_param(regtest, int, 0444);
 134 MODULE_PARM_DESC(regtest, "The type of regulatory test we want to run");
 135
 136 static const char *hwsim_alpha2s[] = {
 137         "FI",
 138         "AL",
 139         "US",
 140         "DE",
 141         "JP",
 142         "AL",
 143 };
 144
 145 static const struct ieee80211_regdomain hwsim_world_regdom_custom_01 = {
 146         .n_reg_rules = 4,
 147         .alpha2 =  "99",
 148         .reg_rules = {
 149                 REG_RULE(2412-10, 2462+10, 40, 0, 20, 0),
 150                 REG_RULE(2484-10, 2484+10, 40, 0, 20, 0),
 151                 REG_RULE(5150-10, 5240+10, 40, 0, 30, 0),
 152                 REG_RULE(5745-10, 5825+10, 40, 0, 30, 0),
 153         }
 154 };
 155
 156 static const struct ieee80211_regdomain hwsim_world_regdom_custom_02 = {
 157         .n_reg_rules = 2,
 158         .alpha2 =  "99",
 159         .reg_rules = {
 160                 REG_RULE(2412-10, 2462+10, 40, 0, 20, 0),
 161                 REG_RULE(5725-10, 5850+10, 40, 0, 30,
 162                          NL80211_RRF_NO_IR),
 163         }
 164 };
 165
 166 static const struct ieee80211_regdomain *hwsim_world_regdom_custom[] = {
 167         &hwsim_world_regdom_custom_01,
 168         &hwsim_world_regdom_custom_02,
 169 };
 170
 171 struct hwsim_vif_priv {
 172         u32 magic;
 173         u8 bssid[ETH_ALEN];
 174         bool assoc;
 175         bool bcn_en;
 176         u16 aid;
 177 };
 178
 179 #define HWSIM_VIF_MAGIC 0x69537748
 180
 181 static inline void hwsim_check_magic(struct ieee80211_vif *vif)
 182 {
 183         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 184         WARN(vp->magic != HWSIM_VIF_MAGIC,
 185              "Invalid VIF (%p) magic %#x, %pM, %d/%d\n",
 186              vif, vp->magic, vif->addr, vif->type, vif->p2p);
 187 }
 188
 189 static inline void hwsim_set_magic(struct ieee80211_vif *vif)
 190 {
 191         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 192         vp->magic = HWSIM_VIF_MAGIC;
 193 }
 194
 195 static inline void hwsim_clear_magic(struct ieee80211_vif *vif)
 196 {
 197         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 198         vp->magic = 0;
 199 }
 200
 201 struct hwsim_sta_priv {
 202         u32 magic;
 203 };
 204
 205 #define HWSIM_STA_MAGIC 0x6d537749
 206
 207 static inline void hwsim_check_sta_magic(struct ieee80211_sta *sta)
 208 {
 209         struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
 210         WARN_ON(sp->magic != HWSIM_STA_MAGIC);
 211 }
 212
 213 static inline void hwsim_set_sta_magic(struct ieee80211_sta *sta)
 214 {
 215         struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
 216         sp->magic = HWSIM_STA_MAGIC;
 217 }
 218
 219 static inline void hwsim_clear_sta_magic(struct ieee80211_sta *sta)
 220 {
 221         struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
 222         sp->magic = 0;
 223 }
 224
 225 struct hwsim_chanctx_priv {
 226         u32 magic;
 227 };
 228
 229 #define HWSIM_CHANCTX_MAGIC 0x6d53774a
 230
 231 static inline void hwsim_check_chanctx_magic(struct ieee80211_chanctx_conf *c)
 232 {
 233         struct hwsim_chanctx_priv *cp = (void *)c->drv_priv;
 234         WARN_ON(cp->magic != HWSIM_CHANCTX_MAGIC);
 235 }
 236
 237 static inline void hwsim_set_chanctx_magic(struct ieee80211_chanctx_conf *c)
 238 {
 239         struct hwsim_chanctx_priv *cp = (void *)c->drv_priv;
 240         cp->magic = HWSIM_CHANCTX_MAGIC;
 241 }
 242
 243 static inline void hwsim_clear_chanctx_magic(struct ieee80211_chanctx_conf *c)
 244 {
 245         struct hwsim_chanctx_priv *cp = (void *)c->drv_priv;
 246         cp->magic = 0;
 247 }
 248
 249 static struct class *hwsim_class;
 250
 251 static struct net_device *hwsim_mon; /* global monitor netdev */
 252
 253 #define CHAN2G(_freq)  { \
 254         .band = IEEE80211_BAND_2GHZ, \
 255         .center_freq = (_freq), \
 256         .hw_value = (_freq), \
 257         .max_power = 20, \
 258 }
 259
 260 #define CHAN5G(_freq) { \
 261         .band = IEEE80211_BAND_5GHZ, \
 262         .center_freq = (_freq), \
 263         .hw_value = (_freq), \
 264         .max_power = 20, \
 265 }
 266
 267 static const struct ieee80211_channel hwsim_channels_2ghz[] = {
 268         CHAN2G(2412), /* Channel 1 */
 269         CHAN2G(2417), /* Channel 2 */
 270         CHAN2G(2422), /* Channel 3 */
 271         CHAN2G(2427), /* Channel 4 */
 272         CHAN2G(2432), /* Channel 5 */
 273         CHAN2G(2437), /* Channel 6 */
 274         CHAN2G(2442), /* Channel 7 */
 275         CHAN2G(2447), /* Channel 8 */
 276         CHAN2G(2452), /* Channel 9 */
 277         CHAN2G(2457), /* Channel 10 */
 278         CHAN2G(2462), /* Channel 11 */
 279         CHAN2G(2467), /* Channel 12 */
 280         CHAN2G(2472), /* Channel 13 */
 281         CHAN2G(2484), /* Channel 14 */
 282 };
 283
 284 static const struct ieee80211_channel hwsim_channels_5ghz[] = {
 285         CHAN5G(5180), /* Channel 36 */
 286         CHAN5G(5200), /* Channel 40 */
 287         CHAN5G(5220), /* Channel 44 */
 288         CHAN5G(5240), /* Channel 48 */
 289
 290         CHAN5G(5260), /* Channel 52 */
 291         CHAN5G(5280), /* Channel 56 */
 292         CHAN5G(5300), /* Channel 60 */
 293         CHAN5G(5320), /* Channel 64 */
 294
 295         CHAN5G(5500), /* Channel 100 */
 296         CHAN5G(5520), /* Channel 104 */
 297         CHAN5G(5540), /* Channel 108 */
 298         CHAN5G(5560), /* Channel 112 */
 299         CHAN5G(5580), /* Channel 116 */
 300         CHAN5G(5600), /* Channel 120 */
 301         CHAN5G(5620), /* Channel 124 */
 302         CHAN5G(5640), /* Channel 128 */
 303         CHAN5G(5660), /* Channel 132 */
 304         CHAN5G(5680), /* Channel 136 */
 305         CHAN5G(5700), /* Channel 140 */
 306
 307         CHAN5G(5745), /* Channel 149 */
 308         CHAN5G(5765), /* Channel 153 */
 309         CHAN5G(5785), /* Channel 157 */
 310         CHAN5G(5805), /* Channel 161 */
 311         CHAN5G(5825), /* Channel 165 */
 312 };
 313
 314 static const struct ieee80211_rate hwsim_rates[] = {
 315         { .bitrate = 10 },
 316         { .bitrate = 20, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
 317         { .bitrate = 55, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
 318         { .bitrate = 110, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
 319         { .bitrate = 60 },
 320         { .bitrate = 90 },
 321         { .bitrate = 120 },
 322         { .bitrate = 180 },
 323         { .bitrate = 240 },
 324         { .bitrate = 360 },
 325         { .bitrate = 480 },
 326         { .bitrate = 540 }
 327 };
 328
 329 static const struct ieee80211_iface_limit hwsim_if_limits[] = {
 330         { .max = 1, .types = BIT(NL80211_IFTYPE_ADHOC) },
 331         { .max = 2048,  .types = BIT(NL80211_IFTYPE_STATION) |
 332                                  BIT(NL80211_IFTYPE_P2P_CLIENT) |
 333 #ifdef CONFIG_MAC80211_MESH
 334                                  BIT(NL80211_IFTYPE_MESH_POINT) |
 335 #endif
 336                                  BIT(NL80211_IFTYPE_AP) |
 337                                  BIT(NL80211_IFTYPE_P2P_GO) },
 338         { .max = 1, .types = BIT(NL80211_IFTYPE_P2P_DEVICE) },
 339 };
 340
 341 static const struct ieee80211_iface_limit hwsim_if_dfs_limits[] = {
 342         { .max = 8, .types = BIT(NL80211_IFTYPE_AP) },
 343 };
 344
 345 static const struct ieee80211_iface_combination hwsim_if_comb[] = {
 346         {
 347                 .limits = hwsim_if_limits,
 348                 .n_limits = ARRAY_SIZE(hwsim_if_limits),
 349                 .max_interfaces = 2048,
 350                 .num_different_channels = 1,
 351         },
 352         {
 353                 .limits = hwsim_if_dfs_limits,
 354                 .n_limits = ARRAY_SIZE(hwsim_if_dfs_limits),
 355                 .max_interfaces = 8,
 356                 .num_different_channels = 1,
 357                 .radar_detect_widths = BIT(NL80211_CHAN_WIDTH_20_NOHT) |
 358                                        BIT(NL80211_CHAN_WIDTH_20) |
 359                                        BIT(NL80211_CHAN_WIDTH_40) |
 360                                        BIT(NL80211_CHAN_WIDTH_80) |
 361                                        BIT(NL80211_CHAN_WIDTH_160),
 362         }
 363 };
 364
 365 static spinlock_t hwsim_radio_lock;
 366 static struct list_head hwsim_radios;
 367 static int hwsim_radio_idx;
 368
 369 static struct platform_driver mac80211_hwsim_driver = {
 370         .driver = {
 371                 .name = "mac80211_hwsim",
 372                 .owner = THIS_MODULE,
 373         },
 374 };
 375
 376 struct mac80211_hwsim_data {
 377         struct list_head list;
 378         struct ieee80211_hw *hw;
 379         struct device *dev;
 380         struct ieee80211_supported_band bands[IEEE80211_NUM_BANDS];
 381         struct ieee80211_channel channels_2ghz[ARRAY_SIZE(hwsim_channels_2ghz)];
 382         struct ieee80211_channel channels_5ghz[ARRAY_SIZE(hwsim_channels_5ghz)];
 383         struct ieee80211_rate rates[ARRAY_SIZE(hwsim_rates)];
 384         struct ieee80211_iface_combination if_combination;
 385
 386         struct mac_address addresses[2];
 387         int channels, idx;
 388
 389         struct ieee80211_channel *tmp_chan;
 390         struct delayed_work roc_done;
 391         struct delayed_work hw_scan;
 392         struct cfg80211_scan_request *hw_scan_request;
 393         struct ieee80211_vif *hw_scan_vif;
 394         int scan_chan_idx;
 395
 396         struct ieee80211_channel *channel;
 397         u64 beacon_int  /* beacon interval in us */;
 398         unsigned int rx_filter;
 399         bool started, idle, scanning;
 400         struct mutex mutex;
 401         struct tasklet_hrtimer beacon_timer;
 402         enum ps_mode {
 403                 PS_DISABLED, PS_ENABLED, PS_AUTO_POLL, PS_MANUAL_POLL
 404         } ps;
 405         bool ps_poll_pending;
 406         struct dentry *debugfs;
 407
 408         struct sk_buff_head pending;    /* packets pending */
 409         /*
 410          * Only radios in the same group can communicate together (the
 411          * channel has to match too). Each bit represents a group. A
 412          * radio can be in more then one group.
 413          */
 414         u64 group;
 415
 416         int power_level;
 417
 418         /* difference between this hw's clock and the real clock, in usecs */
 419         s64 tsf_offset;
 420         s64 bcn_delta;
 421         /* absolute beacon transmission time. Used to cover up "tx" delay. */
 422         u64 abs_bcn_ts;
 423 };
 424
 425
 426 struct hwsim_radiotap_hdr {
 427         struct ieee80211_radiotap_header hdr;
 428         __le64 rt_tsft;
 429         u8 rt_flags;
 430         u8 rt_rate;
 431         __le16 rt_channel;
 432         __le16 rt_chbitmask;
 433 } __packed;
 434
 435 struct hwsim_radiotap_ack_hdr {
 436         struct ieee80211_radiotap_header hdr;
 437         u8 rt_flags;
 438         u8 pad;
 439         __le16 rt_channel;
 440         __le16 rt_chbitmask;
 441 } __packed;
 442
 443 /* MAC80211_HWSIM netlinf family */
 444 static struct genl_family hwsim_genl_family = {
 445         .id = GENL_ID_GENERATE,
 446         .hdrsize = 0,
 447         .name = "MAC80211_HWSIM",
 448         .version = 1,
 449         .maxattr = HWSIM_ATTR_MAX,
 450 };
 451
 452 /* MAC80211_HWSIM netlink policy */
 453
 454 static struct nla_policy hwsim_genl_policy[HWSIM_ATTR_MAX + 1] = {
 455         [HWSIM_ATTR_ADDR_RECEIVER] = { .type = NLA_UNSPEC, .len = ETH_ALEN },
 456         [HWSIM_ATTR_ADDR_TRANSMITTER] = { .type = NLA_UNSPEC, .len = ETH_ALEN },
 457         [HWSIM_ATTR_FRAME] = { .type = NLA_BINARY,
 458                                .len = IEEE80211_MAX_DATA_LEN },
 459         [HWSIM_ATTR_FLAGS] = { .type = NLA_U32 },
 460         [HWSIM_ATTR_RX_RATE] = { .type = NLA_U32 },
 461         [HWSIM_ATTR_SIGNAL] = { .type = NLA_U32 },
 462         [HWSIM_ATTR_TX_INFO] = { .type = NLA_UNSPEC,
 463                                  .len = IEEE80211_TX_MAX_RATES *
 464                                         sizeof(struct hwsim_tx_rate)},
 465         [HWSIM_ATTR_COOKIE] = { .type = NLA_U64 },
 466         [HWSIM_ATTR_CHANNELS] = { .type = NLA_U32 },
 467         [HWSIM_ATTR_RADIO_ID] = { .type = NLA_U32 },
 468         [HWSIM_ATTR_REG_HINT_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 469         [HWSIM_ATTR_REG_CUSTOM_REG] = { .type = NLA_U32 },
 470         [HWSIM_ATTR_REG_STRICT_REG] = { .type = NLA_FLAG },
 471 };
 472
 473 static void mac80211_hwsim_tx_frame(struct ieee80211_hw *hw,
 474                                     struct sk_buff *skb,
 475                                     struct ieee80211_channel *chan);
 476
 477 /* sysfs attributes */
 478 static void hwsim_send_ps_poll(void *dat, u8 *mac, struct ieee80211_vif *vif)
 479 {
 480         struct mac80211_hwsim_data *data = dat;
 481         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 482         struct sk_buff *skb;
 483         struct ieee80211_pspoll *pspoll;
 484
 485         if (!vp->assoc)
 486                 return;
 487
 488         wiphy_debug(data->hw->wiphy,
 489                     "%s: send PS-Poll to %pM for aid %d\n",
 490                     __func__, vp->bssid, vp->aid);
 491
 492         skb = dev_alloc_skb(sizeof(*pspoll));
 493         if (!skb)
 494                 return;
 495         pspoll = (void *) skb_put(skb, sizeof(*pspoll));
 496         pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
 497                                             IEEE80211_STYPE_PSPOLL |
 498                                             IEEE80211_FCTL_PM);
 499         pspoll->aid = cpu_to_le16(0xc000 | vp->aid);
 500         memcpy(pspoll->bssid, vp->bssid, ETH_ALEN);
 501         memcpy(pspoll->ta, mac, ETH_ALEN);
 502
 503         rcu_read_lock();
 504         mac80211_hwsim_tx_frame(data->hw, skb,
 505                                 rcu_dereference(vif->chanctx_conf)->def.chan);
 506         rcu_read_unlock();
 507 }
 508
 509 static void hwsim_send_nullfunc(struct mac80211_hwsim_data *data, u8 *mac,
 510                                 struct ieee80211_vif *vif, int ps)
 511 {
 512         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 513         struct sk_buff *skb;
 514         struct ieee80211_hdr *hdr;
 515
 516         if (!vp->assoc)
 517                 return;
 518
 519         wiphy_debug(data->hw->wiphy,
 520                     "%s: send data::nullfunc to %pM ps=%d\n",
 521                     __func__, vp->bssid, ps);
 522
 523         skb = dev_alloc_skb(sizeof(*hdr));
 524         if (!skb)
 525                 return;
 526         hdr = (void *) skb_put(skb, sizeof(*hdr) - ETH_ALEN);
 527         hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
 528                                          IEEE80211_STYPE_NULLFUNC |
 529                                          (ps ? IEEE80211_FCTL_PM : 0));
 530         hdr->duration_id = cpu_to_le16(0);
 531         memcpy(hdr->addr1, vp->bssid, ETH_ALEN);
 532         memcpy(hdr->addr2, mac, ETH_ALEN);
 533         memcpy(hdr->addr3, vp->bssid, ETH_ALEN);
 534
 535         rcu_read_lock();
 536         mac80211_hwsim_tx_frame(data->hw, skb,
 537                                 rcu_dereference(vif->chanctx_conf)->def.chan);
 538         rcu_read_unlock();
 539 }
 540
 541
 542 static void hwsim_send_nullfunc_ps(void *dat, u8 *mac,
 543                                    struct ieee80211_vif *vif)
 544 {
 545         struct mac80211_hwsim_data *data = dat;
 546         hwsim_send_nullfunc(data, mac, vif, 1);
 547 }
 548
 549 static void hwsim_send_nullfunc_no_ps(void *dat, u8 *mac,
 550                                       struct ieee80211_vif *vif)
 551 {
 552         struct mac80211_hwsim_data *data = dat;
 553         hwsim_send_nullfunc(data, mac, vif, 0);
 554 }
 555
 556 static int hwsim_fops_ps_read(void *dat, u64 *val)
 557 {
 558         struct mac80211_hwsim_data *data = dat;
 559         *val = data->ps;
 560         return 0;
 561 }
 562
 563 static int hwsim_fops_ps_write(void *dat, u64 val)
 564 {
 565         struct mac80211_hwsim_data *data = dat;
 566         enum ps_mode old_ps;
 567
 568         if (val != PS_DISABLED && val != PS_ENABLED && val != PS_AUTO_POLL &&
 569             val != PS_MANUAL_POLL)
 570                 return -EINVAL;
 571
 572         old_ps = data->ps;
 573         data->ps = val;
 574
 575         if (val == PS_MANUAL_POLL) {
 576                 ieee80211_iterate_active_interfaces(data->hw,
 577                                                     IEEE80211_IFACE_ITER_NORMAL,
 578                                                     hwsim_send_ps_poll, data);
 579                 data->ps_poll_pending = true;
 580         } else if (old_ps == PS_DISABLED && val != PS_DISABLED) {
 581                 ieee80211_iterate_active_interfaces(data->hw,
 582                                                     IEEE80211_IFACE_ITER_NORMAL,
 583                                                     hwsim_send_nullfunc_ps,
 584                                                     data);
 585         } else if (old_ps != PS_DISABLED && val == PS_DISABLED) {
 586                 ieee80211_iterate_active_interfaces(data->hw,
 587                                                     IEEE80211_IFACE_ITER_NORMAL,
 588                                                     hwsim_send_nullfunc_no_ps,
 589                                                     data);
 590         }
 591
 592         return 0;
 593 }
 594
 595 DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_ps, hwsim_fops_ps_read, hwsim_fops_ps_write,
 596                         "%llu\n");
 597
 598 static int hwsim_write_simulate_radar(void *dat, u64 val)
 599 {
 600         struct mac80211_hwsim_data *data = dat;
 601
 602         ieee80211_radar_detected(data->hw);
 603
 604         return 0;
 605 }
 606
 607 DEFINE_SIMPLE_ATTRIBUTE(hwsim_simulate_radar, NULL,
 608                         hwsim_write_simulate_radar, "%llu\n");
 609
 610 static int hwsim_fops_group_read(void *dat, u64 *val)
 611 {
 612         struct mac80211_hwsim_data *data = dat;
 613         *val = data->group;
 614         return 0;
 615 }
 616
 617 static int hwsim_fops_group_write(void *dat, u64 val)
 618 {
 619         struct mac80211_hwsim_data *data = dat;
 620         data->group = val;
 621         return 0;
 622 }
 623
 624 DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_group,
 625                         hwsim_fops_group_read, hwsim_fops_group_write,
 626                         "%llx\n");
 627
 628 static netdev_tx_t hwsim_mon_xmit(struct sk_buff *skb,
 629                                         struct net_device *dev)
 630 {
 631         /* TODO: allow packet injection */
 632         dev_kfree_skb(skb);
 633         return NETDEV_TX_OK;
 634 }
 635
 636 static inline u64 mac80211_hwsim_get_tsf_raw(void)
 637 {
 638         return ktime_to_us(ktime_get_real());
 639 }
 640
 641 static __le64 __mac80211_hwsim_get_tsf(struct mac80211_hwsim_data *data)
 642 {
 643         u64 now = mac80211_hwsim_get_tsf_raw();
 644         return cpu_to_le64(now + data->tsf_offset);
 645 }
 646
 647 static u64 mac80211_hwsim_get_tsf(struct ieee80211_hw *hw,
 648                                   struct ieee80211_vif *vif)
 649 {
 650         struct mac80211_hwsim_data *data = hw->priv;
 651         return le64_to_cpu(__mac80211_hwsim_get_tsf(data));
 652 }
 653
 654 static void mac80211_hwsim_set_tsf(struct ieee80211_hw *hw,
 655                 struct ieee80211_vif *vif, u64 tsf)
 656 {
 657         struct mac80211_hwsim_data *data = hw->priv;
 658         u64 now = mac80211_hwsim_get_tsf(hw, vif);
 659         u32 bcn_int = data->beacon_int;
 660         s64 delta = tsf - now;
 661
 662         data->tsf_offset += delta;
 663         /* adjust after beaconing with new timestamp at old TBTT */
 664         data->bcn_delta = do_div(delta, bcn_int);
 665 }
 666
 667 static void mac80211_hwsim_monitor_rx(struct ieee80211_hw *hw,
 668                                       struct sk_buff *tx_skb,
 669                                       struct ieee80211_channel *chan)
 670 {
 671         struct mac80211_hwsim_data *data = hw->priv;
 672         struct sk_buff *skb;
 673         struct hwsim_radiotap_hdr *hdr;
 674         u16 flags;
 675         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_skb);
 676         struct ieee80211_rate *txrate = ieee80211_get_tx_rate(hw, info);
 677
 678         if (!netif_running(hwsim_mon))
 679                 return;
 680
 681         skb = skb_copy_expand(tx_skb, sizeof(*hdr), 0, GFP_ATOMIC);
 682         if (skb == NULL)
 683                 return;
 684
 685         hdr = (struct hwsim_radiotap_hdr *) skb_push(skb, sizeof(*hdr));
 686         hdr->hdr.it_version = PKTHDR_RADIOTAP_VERSION;
 687         hdr->hdr.it_pad = 0;
 688         hdr->hdr.it_len = cpu_to_le16(sizeof(*hdr));
 689         hdr->hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
 690                                           (1 << IEEE80211_RADIOTAP_RATE) |
 691                                           (1 << IEEE80211_RADIOTAP_TSFT) |
 692                                           (1 << IEEE80211_RADIOTAP_CHANNEL));
 693         hdr->rt_tsft = __mac80211_hwsim_get_tsf(data);
 694         hdr->rt_flags = 0;
 695         hdr->rt_rate = txrate->bitrate / 5;
 696         hdr->rt_channel = cpu_to_le16(chan->center_freq);
 697         flags = IEEE80211_CHAN_2GHZ;
 698         if (txrate->flags & IEEE80211_RATE_ERP_G)
 699                 flags |= IEEE80211_CHAN_OFDM;
 700         else
 701                 flags |= IEEE80211_CHAN_CCK;
 702         hdr->rt_chbitmask = cpu_to_le16(flags);
 703
 704         skb->dev = hwsim_mon;
 705         skb_set_mac_header(skb, 0);
 706         skb->ip_summed = CHECKSUM_UNNECESSARY;
 707         skb->pkt_type = PACKET_OTHERHOST;
 708         skb->protocol = htons(ETH_P_802_2);
 709         memset(skb->cb, 0, sizeof(skb->cb));
 710         netif_rx(skb);
 711 }
 712
 713
 714 static void mac80211_hwsim_monitor_ack(struct ieee80211_channel *chan,
 715                                        const u8 *addr)
 716 {
 717         struct sk_buff *skb;
 718         struct hwsim_radiotap_ack_hdr *hdr;
 719         u16 flags;
 720         struct ieee80211_hdr *hdr11;
 721
 722         if (!netif_running(hwsim_mon))
 723                 return;
 724
 725         skb = dev_alloc_skb(100);
 726         if (skb == NULL)
 727                 return;
 728
 729         hdr = (struct hwsim_radiotap_ack_hdr *) skb_put(skb, sizeof(*hdr));
 730         hdr->hdr.it_version = PKTHDR_RADIOTAP_VERSION;
 731         hdr->hdr.it_pad = 0;
 732         hdr->hdr.it_len = cpu_to_le16(sizeof(*hdr));
 733         hdr->hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
 734                                           (1 << IEEE80211_RADIOTAP_CHANNEL));
 735         hdr->rt_flags = 0;
 736         hdr->pad = 0;
 737         hdr->rt_channel = cpu_to_le16(chan->center_freq);
 738         flags = IEEE80211_CHAN_2GHZ;
 739         hdr->rt_chbitmask = cpu_to_le16(flags);
 740
 741         hdr11 = (struct ieee80211_hdr *) skb_put(skb, 10);
 742         hdr11->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
 743                                            IEEE80211_STYPE_ACK);
 744         hdr11->duration_id = cpu_to_le16(0);
 745         memcpy(hdr11->addr1, addr, ETH_ALEN);
 746
 747         skb->dev = hwsim_mon;
 748         skb_set_mac_header(skb, 0);
 749         skb->ip_summed = CHECKSUM_UNNECESSARY;
 750         skb->pkt_type = PACKET_OTHERHOST;
 751         skb->protocol = htons(ETH_P_802_2);
 752         memset(skb->cb, 0, sizeof(skb->cb));
 753         netif_rx(skb);
 754 }
 755
 756
 757 static bool hwsim_ps_rx_ok(struct mac80211_hwsim_data *data,
 758                            struct sk_buff *skb)
 759 {
 760         switch (data->ps) {
 761         case PS_DISABLED:
 762                 return true;
 763         case PS_ENABLED:
 764                 return false;
 765         case PS_AUTO_POLL:
 766                 /* TODO: accept (some) Beacons by default and other frames only
 767                  * if pending PS-Poll has been sent */
 768                 return true;
 769         case PS_MANUAL_POLL:
 770                 /* Allow unicast frames to own address if there is a pending
 771                  * PS-Poll */
 772                 if (data->ps_poll_pending &&
 773                     memcmp(data->hw->wiphy->perm_addr, skb->data + 4,
 774                            ETH_ALEN) == 0) {
 775                         data->ps_poll_pending = false;
 776                         return true;
 777                 }
 778                 return false;
 779         }
 780
 781         return true;
 782 }
 783
 784
 785 struct mac80211_hwsim_addr_match_data {
 786         bool ret;
 787         const u8 *addr;
 788 };
 789
 790 static void mac80211_hwsim_addr_iter(void *data, u8 *mac,
 791                                      struct ieee80211_vif *vif)
 792 {
 793         struct mac80211_hwsim_addr_match_data *md = data;
 794         if (memcmp(mac, md->addr, ETH_ALEN) == 0)
 795                 md->ret = true;
 796 }
 797
 798
 799 static bool mac80211_hwsim_addr_match(struct mac80211_hwsim_data *data,
 800                                       const u8 *addr)
 801 {
 802         struct mac80211_hwsim_addr_match_data md;
 803
 804         if (memcmp(addr, data->hw->wiphy->perm_addr, ETH_ALEN) == 0)
 805                 return true;
 806
 807         md.ret = false;
 808         md.addr = addr;
 809         ieee80211_iterate_active_interfaces_atomic(data->hw,
 810                                                    IEEE80211_IFACE_ITER_NORMAL,
 811                                                    mac80211_hwsim_addr_iter,
 812                                                    &md);
 813
 814         return md.ret;
 815 }
 816
 817 static void mac80211_hwsim_tx_frame_nl(struct ieee80211_hw *hw,
 818                                        struct sk_buff *my_skb,
 819                                        int dst_portid)
 820 {
 821         struct sk_buff *skb;
 822         struct mac80211_hwsim_data *data = hw->priv;
 823         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) my_skb->data;
 824         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(my_skb);
 825         void *msg_head;
 826         unsigned int hwsim_flags = 0;
 827         int i;
 828         struct hwsim_tx_rate tx_attempts[IEEE80211_TX_MAX_RATES];
 829
 830         if (data->ps != PS_DISABLED)
 831                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 832         /* If the queue contains MAX_QUEUE skb's drop some */
 833         if (skb_queue_len(&data->pending) >= MAX_QUEUE) {
 834                 /* Droping until WARN_QUEUE level */
 835                 while (skb_queue_len(&data->pending) >= WARN_QUEUE)
 836                         skb_dequeue(&data->pending);
 837         }
 838
 839         skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_ATOMIC);
 840         if (skb == NULL)
 841                 goto nla_put_failure;
 842
 843         msg_head = genlmsg_put(skb, 0, 0, &hwsim_genl_family, 0,
 844                                HWSIM_CMD_FRAME);
 845         if (msg_head == NULL) {
 846                 printk(KERN_DEBUG "mac80211_hwsim: problem with msg_head\n");
 847                 goto nla_put_failure;
 848         }
 849
 850         if (nla_put(skb, HWSIM_ATTR_ADDR_TRANSMITTER,
 851                     ETH_ALEN, data->addresses[1].addr))
 852                 goto nla_put_failure;
 853
 854         /* We get the skb->data */
 855         if (nla_put(skb, HWSIM_ATTR_FRAME, my_skb->len, my_skb->data))
 856                 goto nla_put_failure;
 857
 858         /* We get the flags for this transmission, and we translate them to
 859            wmediumd flags  */
 860
 861         if (info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS)
 862                 hwsim_flags |= HWSIM_TX_CTL_REQ_TX_STATUS;
 863
 864         if (info->flags & IEEE80211_TX_CTL_NO_ACK)
 865                 hwsim_flags |= HWSIM_TX_CTL_NO_ACK;
 866
 867         if (nla_put_u32(skb, HWSIM_ATTR_FLAGS, hwsim_flags))
 868                 goto nla_put_failure;
 869
 870         /* We get the tx control (rate and retries) info*/
 871
 872         for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
 873                 tx_attempts[i].idx = info->status.rates[i].idx;
 874                 tx_attempts[i].count = info->status.rates[i].count;
 875         }
 876
 877         if (nla_put(skb, HWSIM_ATTR_TX_INFO,
 878                     sizeof(struct hwsim_tx_rate)*IEEE80211_TX_MAX_RATES,
 879                     tx_attempts))
 880                 goto nla_put_failure;
 881
 882         /* We create a cookie to identify this skb */
 883         if (nla_put_u64(skb, HWSIM_ATTR_COOKIE, (unsigned long) my_skb))
 884                 goto nla_put_failure;
 885
 886         genlmsg_end(skb, msg_head);
 887         genlmsg_unicast(&init_net, skb, dst_portid);
 888
 889         /* Enqueue the packet */
 890         skb_queue_tail(&data->pending, my_skb);
 891         return;
 892
 893 nla_put_failure:
 894         printk(KERN_DEBUG "mac80211_hwsim: error occurred in %s\n", __func__);
 895 }
 896
 897 static bool hwsim_chans_compat(struct ieee80211_channel *c1,
 898                                struct ieee80211_channel *c2)
 899 {
 900         if (!c1 || !c2)
 901                 return false;
 902
 903         return c1->center_freq == c2->center_freq;
 904 }
 905
 906 struct tx_iter_data {
 907         struct ieee80211_channel *channel;
 908         bool receive;
 909 };
 910
 911 static void mac80211_hwsim_tx_iter(void *_data, u8 *addr,
 912                                    struct ieee80211_vif *vif)
 913 {
 914         struct tx_iter_data *data = _data;
 915
 916         if (!vif->chanctx_conf)
 917                 return;
 918
 919         if (!hwsim_chans_compat(data->channel,
 920                                 rcu_dereference(vif->chanctx_conf)->def.chan))
 921                 return;
 922
 923         data->receive = true;
 924 }
 925
 926 static bool mac80211_hwsim_tx_frame_no_nl(struct ieee80211_hw *hw,
 927                                           struct sk_buff *skb,
 928                                           struct ieee80211_channel *chan)
 929 {
 930         struct mac80211_hwsim_data *data = hw->priv, *data2;
 931         bool ack = false;
 932         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 933         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 934         struct ieee80211_rx_status rx_status;
 935         u64 now;
 936
 937         memset(&rx_status, 0, sizeof(rx_status));
 938         rx_status.flag |= RX_FLAG_MACTIME_START;
 939         rx_status.freq = chan->center_freq;
 940         rx_status.band = chan->band;
 941         if (info->control.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) {
 942                 rx_status.rate_idx =
 943                         ieee80211_rate_get_vht_mcs(&info->control.rates[0]);
 944                 rx_status.vht_nss =
 945                         ieee80211_rate_get_vht_nss(&info->control.rates[0]);
 946                 rx_status.flag |= RX_FLAG_VHT;
 947         } else {
 948                 rx_status.rate_idx = info->control.rates[0].idx;
 949                 if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS)
 950                         rx_status.flag |= RX_FLAG_HT;
 951         }
 952         if (info->control.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
 953                 rx_status.flag |= RX_FLAG_40MHZ;
 954         if (info->control.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
 955                 rx_status.flag |= RX_FLAG_SHORT_GI;
 956         /* TODO: simulate real signal strength (and optional packet loss) */
 957         rx_status.signal = data->power_level - 50;
 958
 959         if (data->ps != PS_DISABLED)
 960                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 961
 962         /* release the skb's source info */
 963         skb_orphan(skb);
 964         skb_dst_drop(skb);
 965         skb->mark = 0;
 966         secpath_reset(skb);
 967         nf_reset(skb);
 968
 969         /*
 970          * Get absolute mactime here so all HWs RX at the "same time", and
 971          * absolute TX time for beacon mactime so the timestamp matches.
 972          * Giving beacons a different mactime than non-beacons looks messy, but
 973          * it helps the Toffset be exact and a ~10us mactime discrepancy
 974          * probably doesn't really matter.
 975          */
 976         if (ieee80211_is_beacon(hdr->frame_control) ||
 977             ieee80211_is_probe_resp(hdr->frame_control))
 978                 now = data->abs_bcn_ts;
 979         else
 980                 now = mac80211_hwsim_get_tsf_raw();
 981
 982         /* Copy skb to all enabled radios that are on the current frequency */
 983         spin_lock(&hwsim_radio_lock);
 984         list_for_each_entry(data2, &hwsim_radios, list) {
 985                 struct sk_buff *nskb;
 986                 struct tx_iter_data tx_iter_data = {
 987                         .receive = false,
 988                         .channel = chan,
 989                 };
 990
 991                 if (data == data2)
 992                         continue;
 993
 994                 if (!data2->started || (data2->idle && !data2->tmp_chan) ||
 995                     !hwsim_ps_rx_ok(data2, skb))
 996                         continue;
 997
 998                 if (!(data->group & data2->group))
 999                         continue;
1000
1001                 if (!hwsim_chans_compat(chan, data2->tmp_chan) &&
1002                     !hwsim_chans_compat(chan, data2->channel)) {
1003                         ieee80211_iterate_active_interfaces_atomic(
1004                                 data2->hw, IEEE80211_IFACE_ITER_NORMAL,
1005                                 mac80211_hwsim_tx_iter, &tx_iter_data);
1006                         if (!tx_iter_data.receive)
1007                                 continue;
1008                 }
1009
1010                 /*
1011                  * reserve some space for our vendor and the normal
1012                  * radiotap header, since we're copying anyway
1013                  */
1014                 if (skb->len < PAGE_SIZE && paged_rx) {
1015                         struct page *page = alloc_page(GFP_ATOMIC);
1016
1017                         if (!page)
1018                                 continue;
1019
1020                         nskb = dev_alloc_skb(128);
1021                         if (!nskb) {
1022                                 __free_page(page);
1023                                 continue;
1024                         }
1025
1026                         memcpy(page_address(page), skb->data, skb->len);
1027                         skb_add_rx_frag(nskb, 0, page, 0, skb->len, skb->len);
1028                 } else {
1029                         nskb = skb_copy(skb, GFP_ATOMIC);
1030                         if (!nskb)
1031                                 continue;
1032                 }
1033
1034                 if (mac80211_hwsim_addr_match(data2, hdr->addr1))
1035                         ack = true;
1036
1037                 rx_status.mactime = now + data2->tsf_offset;
1038 #if 0
1039                 /*
1040                  * Don't enable this code by default as the OUI 00:00:00
1041                  * is registered to Xerox so we shouldn't use it here, it
1042                  * might find its way into pcap files.
1043                  * Note that this code requires the headroom in the SKB
1044                  * that was allocated earlier.
1045                  */
1046                 rx_status.vendor_radiotap_oui[0] = 0x00;
1047                 rx_status.vendor_radiotap_oui[1] = 0x00;
1048                 rx_status.vendor_radiotap_oui[2] = 0x00;
1049                 rx_status.vendor_radiotap_subns = 127;
1050                 /*
1051                  * Radiotap vendor namespaces can (and should) also be
1052                  * split into fields by using the standard radiotap
1053                  * presence bitmap mechanism. Use just BIT(0) here for
1054                  * the presence bitmap.
1055                  */
1056                 rx_status.vendor_radiotap_bitmap = BIT(0);
1057                 /* We have 8 bytes of (dummy) data */
1058                 rx_status.vendor_radiotap_len = 8;
1059                 /* For testing, also require it to be aligned */
1060                 rx_status.vendor_radiotap_align = 8;
1061                 /* push the data */
1062                 memcpy(skb_push(nskb, 8), "ABCDEFGH", 8);
1063 #endif
1064
1065                 memcpy(IEEE80211_SKB_RXCB(nskb), &rx_status, sizeof(rx_status));
1066                 ieee80211_rx_irqsafe(data2->hw, nskb);
1067         }
1068         spin_unlock(&hwsim_radio_lock);
1069
1070         return ack;
1071 }
1072
1073 static void mac80211_hwsim_tx(struct ieee80211_hw *hw,
1074                               struct ieee80211_tx_control *control,
1075                               struct sk_buff *skb)
1076 {
1077         struct mac80211_hwsim_data *data = hw->priv;
1078         struct ieee80211_tx_info *txi = IEEE80211_SKB_CB(skb);
1079         struct ieee80211_chanctx_conf *chanctx_conf;
1080         struct ieee80211_channel *channel;
1081         bool ack;
1082         u32 _portid;
1083
1084         if (WARN_ON(skb->len < 10)) {
1085                 /* Should not happen; just a sanity check for addr1 use */
1086                 ieee80211_free_txskb(hw, skb);
1087                 return;
1088         }
1089
1090         if (data->channels == 1) {
1091                 channel = data->channel;
1092         } else if (txi->hw_queue == 4) {
1093                 channel = data->tmp_chan;
1094         } else {
1095                 chanctx_conf = rcu_dereference(txi->control.vif->chanctx_conf);
1096                 if (chanctx_conf)
1097                         channel = chanctx_conf->def.chan;
1098                 else
1099                         channel = NULL;
1100         }
1101
1102         if (WARN(!channel, "TX w/o channel - queue = %d\n", txi->hw_queue)) {
1103                 ieee80211_free_txskb(hw, skb);
1104                 return;
1105         }
1106
1107         if (data->idle && !data->tmp_chan) {
1108                 wiphy_debug(hw->wiphy, "Trying to TX when idle - reject\n");
1109                 ieee80211_free_txskb(hw, skb);
1110                 return;
1111         }
1112
1113         if (txi->control.vif)
1114                 hwsim_check_magic(txi->control.vif);
1115         if (control->sta)
1116                 hwsim_check_sta_magic(control->sta);
1117
1118         if (hw->flags & IEEE80211_HW_SUPPORTS_RC_TABLE)
1119                 ieee80211_get_tx_rates(txi->control.vif, control->sta, skb,
1120                                        txi->control.rates,
1121                                        ARRAY_SIZE(txi->control.rates));
1122
1123         txi->rate_driver_data[0] = channel;
1124         mac80211_hwsim_monitor_rx(hw, skb, channel);
1125
1126         /* wmediumd mode check */
1127         _portid = ACCESS_ONCE(wmediumd_portid);
1128
1129         if (_portid)
1130                 return mac80211_hwsim_tx_frame_nl(hw, skb, _portid);
1131
1132         /* NO wmediumd detected, perfect medium simulation */
1133         ack = mac80211_hwsim_tx_frame_no_nl(hw, skb, channel);
1134
1135         if (ack && skb->len >= 16) {
1136                 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1137                 mac80211_hwsim_monitor_ack(channel, hdr->addr2);
1138         }
1139
1140         ieee80211_tx_info_clear_status(txi);
1141
1142         /* frame was transmitted at most favorable rate at first attempt */
1143         txi->control.rates[0].count = 1;
1144         txi->control.rates[1].idx = -1;
1145
1146         if (!(txi->flags & IEEE80211_TX_CTL_NO_ACK) && ack)
1147                 txi->flags |= IEEE80211_TX_STAT_ACK;
1148         ieee80211_tx_status_irqsafe(hw, skb);
1149 }
1150
1151
1152 static int mac80211_hwsim_start(struct ieee80211_hw *hw)
1153 {
1154         struct mac80211_hwsim_data *data = hw->priv;
1155         wiphy_debug(hw->wiphy, "%s\n", __func__);
1156         data->started = true;
1157         return 0;
1158 }
1159
1160
1161 static void mac80211_hwsim_stop(struct ieee80211_hw *hw)
1162 {
1163         struct mac80211_hwsim_data *data = hw->priv;
1164         data->started = false;
1165         tasklet_hrtimer_cancel(&data->beacon_timer);
1166         wiphy_debug(hw->wiphy, "%s\n", __func__);
1167 }
1168
1169
1170 static int mac80211_hwsim_add_interface(struct ieee80211_hw *hw,
1171                                         struct ieee80211_vif *vif)
1172 {
1173         wiphy_debug(hw->wiphy, "%s (type=%d mac_addr=%pM)\n",
1174                     __func__, ieee80211_vif_type_p2p(vif),
1175                     vif->addr);
1176         hwsim_set_magic(vif);
1177
1178         vif->cab_queue = 0;
1179         vif->hw_queue[IEEE80211_AC_VO] = 0;
1180         vif->hw_queue[IEEE80211_AC_VI] = 1;
1181         vif->hw_queue[IEEE80211_AC_BE] = 2;
1182         vif->hw_queue[IEEE80211_AC_BK] = 3;
1183
1184         return 0;
1185 }
1186
1187
1188 static int mac80211_hwsim_change_interface(struct ieee80211_hw *hw,
1189                                            struct ieee80211_vif *vif,
1190                                            enum nl80211_iftype newtype,
1191                                            bool newp2p)
1192 {
1193         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1194         wiphy_debug(hw->wiphy,
1195                     "%s (old type=%d, new type=%d, mac_addr=%pM)\n",
1196                     __func__, ieee80211_vif_type_p2p(vif),
1197                     newtype, vif->addr);
1198         hwsim_check_magic(vif);
1199
1200         /*
1201          * interface may change from non-AP to AP in
1202          * which case this needs to be set up again
1203          */
1204         vif->cab_queue = 0;
1205
1206         return 0;
1207 }
1208
1209 static void mac80211_hwsim_remove_interface(
1210         struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1211 {
1212         wiphy_debug(hw->wiphy, "%s (type=%d mac_addr=%pM)\n",
1213                     __func__, ieee80211_vif_type_p2p(vif),
1214                     vif->addr);
1215         hwsim_check_magic(vif);
1216         hwsim_clear_magic(vif);
1217 }
1218
1219 static void mac80211_hwsim_tx_frame(struct ieee80211_hw *hw,
1220                                     struct sk_buff *skb,
1221                                     struct ieee80211_channel *chan)
1222 {
1223         u32 _pid = ACCESS_ONCE(wmediumd_portid);
1224
1225         if (hw->flags & IEEE80211_HW_SUPPORTS_RC_TABLE) {
1226                 struct ieee80211_tx_info *txi = IEEE80211_SKB_CB(skb);
1227                 ieee80211_get_tx_rates(txi->control.vif, NULL, skb,
1228                                        txi->control.rates,
1229                                        ARRAY_SIZE(txi->control.rates));
1230         }
1231
1232         mac80211_hwsim_monitor_rx(hw, skb, chan);
1233
1234         if (_pid)
1235                 return mac80211_hwsim_tx_frame_nl(hw, skb, _pid);
1236
1237         mac80211_hwsim_tx_frame_no_nl(hw, skb, chan);
1238         dev_kfree_skb(skb);
1239 }
1240
1241 static void mac80211_hwsim_beacon_tx(void *arg, u8 *mac,
1242                                      struct ieee80211_vif *vif)
1243 {
1244         struct mac80211_hwsim_data *data = arg;
1245         struct ieee80211_hw *hw = data->hw;
1246         struct ieee80211_tx_info *info;
1247         struct ieee80211_rate *txrate;
1248         struct ieee80211_mgmt *mgmt;
1249         struct sk_buff *skb;
1250
1251         hwsim_check_magic(vif);
1252
1253         if (vif->type != NL80211_IFTYPE_AP &&
1254             vif->type != NL80211_IFTYPE_MESH_POINT &&
1255             vif->type != NL80211_IFTYPE_ADHOC)
1256                 return;
1257
1258         skb = ieee80211_beacon_get(hw, vif);
1259         if (skb == NULL)
1260                 return;
1261         info = IEEE80211_SKB_CB(skb);
1262         if (hw->flags & IEEE80211_HW_SUPPORTS_RC_TABLE)
1263                 ieee80211_get_tx_rates(vif, NULL, skb,
1264                                        info->control.rates,
1265                                        ARRAY_SIZE(info->control.rates));
1266
1267         txrate = ieee80211_get_tx_rate(hw, info);
1268
1269         mgmt = (struct ieee80211_mgmt *) skb->data;
1270         /* fake header transmission time */
1271         data->abs_bcn_ts = mac80211_hwsim_get_tsf_raw();
1272         mgmt->u.beacon.timestamp = cpu_to_le64(data->abs_bcn_ts +
1273                                                data->tsf_offset +
1274                                                24 * 8 * 10 / txrate->bitrate);
1275
1276         mac80211_hwsim_tx_frame(hw, skb,
1277                                 rcu_dereference(vif->chanctx_conf)->def.chan);
1278 }
1279
1280 static enum hrtimer_restart
1281 mac80211_hwsim_beacon(struct hrtimer *timer)
1282 {
1283         struct mac80211_hwsim_data *data =
1284                 container_of(timer, struct mac80211_hwsim_data,
1285                              beacon_timer.timer);
1286         struct ieee80211_hw *hw = data->hw;
1287         u64 bcn_int = data->beacon_int;
1288         ktime_t next_bcn;
1289
1290         if (!data->started)
1291                 goto out;
1292
1293         ieee80211_iterate_active_interfaces_atomic(
1294                 hw, IEEE80211_IFACE_ITER_NORMAL,
1295                 mac80211_hwsim_beacon_tx, data);
1296
1297         /* beacon at new TBTT + beacon interval */
1298         if (data->bcn_delta) {
1299                 bcn_int -= data->bcn_delta;
1300                 data->bcn_delta = 0;
1301         }
1302
1303         next_bcn = ktime_add(hrtimer_get_expires(timer),
1304                              ns_to_ktime(bcn_int * 1000));
1305         tasklet_hrtimer_start(&data->beacon_timer, next_bcn, HRTIMER_MODE_ABS);
1306 out:
1307         return HRTIMER_NORESTART;
1308 }
1309
1310 static const char * const hwsim_chanwidths[] = {
1311         [NL80211_CHAN_WIDTH_20_NOHT] = "noht",
1312         [NL80211_CHAN_WIDTH_20] = "ht20",
1313         [NL80211_CHAN_WIDTH_40] = "ht40",
1314         [NL80211_CHAN_WIDTH_80] = "vht80",
1315         [NL80211_CHAN_WIDTH_80P80] = "vht80p80",
1316         [NL80211_CHAN_WIDTH_160] = "vht160",
1317 };
1318
1319 static int mac80211_hwsim_config(struct ieee80211_hw *hw, u32 changed)
1320 {
1321         struct mac80211_hwsim_data *data = hw->priv;
1322         struct ieee80211_conf *conf = &hw->conf;
1323         static const char *smps_modes[IEEE80211_SMPS_NUM_MODES] = {
1324                 [IEEE80211_SMPS_AUTOMATIC] = "auto",
1325                 [IEEE80211_SMPS_OFF] = "off",
1326                 [IEEE80211_SMPS_STATIC] = "static",
1327                 [IEEE80211_SMPS_DYNAMIC] = "dynamic",
1328         };
1329
1330         if (conf->chandef.chan)
1331                 wiphy_debug(hw->wiphy,
1332                             "%s (freq=%d(%d - %d)/%s idle=%d ps=%d smps=%s)\n",
1333                             __func__,
1334                             conf->chandef.chan->center_freq,
1335                             conf->chandef.center_freq1,
1336                             conf->chandef.center_freq2,
1337                             hwsim_chanwidths[conf->chandef.width],
1338                             !!(conf->flags & IEEE80211_CONF_IDLE),
1339                             !!(conf->flags & IEEE80211_CONF_PS),
1340                             smps_modes[conf->smps_mode]);
1341         else
1342                 wiphy_debug(hw->wiphy,
1343                             "%s (freq=0 idle=%d ps=%d smps=%s)\n",
1344                             __func__,
1345                             !!(conf->flags & IEEE80211_CONF_IDLE),
1346                             !!(conf->flags & IEEE80211_CONF_PS),
1347                             smps_modes[conf->smps_mode]);
1348
1349         data->idle = !!(conf->flags & IEEE80211_CONF_IDLE);
1350
1351         data->channel = conf->chandef.chan;
1352
1353         WARN_ON(data->channel && data->channels > 1);
1354
1355         data->power_level = conf->power_level;
1356         if (!data->started || !data->beacon_int)
1357                 tasklet_hrtimer_cancel(&data->beacon_timer);
1358         else if (!hrtimer_is_queued(&data->beacon_timer.timer)) {
1359                 u64 tsf = mac80211_hwsim_get_tsf(hw, NULL);
1360                 u32 bcn_int = data->beacon_int;
1361                 u64 until_tbtt = bcn_int - do_div(tsf, bcn_int);
1362
1363                 tasklet_hrtimer_start(&data->beacon_timer,
1364                                       ns_to_ktime(until_tbtt * 1000),
1365                                       HRTIMER_MODE_REL);
1366         }
1367
1368         return 0;
1369 }
1370
1371
1372 static void mac80211_hwsim_configure_filter(struct ieee80211_hw *hw,
1373                                             unsigned int changed_flags,
1374                                             unsigned int *total_flags,u64 multicast)
1375 {
1376         struct mac80211_hwsim_data *data = hw->priv;
1377
1378         wiphy_debug(hw->wiphy, "%s\n", __func__);
1379
1380         data->rx_filter = 0;
1381         if (*total_flags & FIF_PROMISC_IN_BSS)
1382                 data->rx_filter |= FIF_PROMISC_IN_BSS;
1383         if (*total_flags & FIF_ALLMULTI)
1384                 data->rx_filter |= FIF_ALLMULTI;
1385
1386         *total_flags = data->rx_filter;
1387 }
1388
1389 static void mac80211_hwsim_bcn_en_iter(void *data, u8 *mac,
1390                                        struct ieee80211_vif *vif)
1391 {
1392         unsigned int *count = data;
1393         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
1394
1395         if (vp->bcn_en)
1396                 (*count)++;
1397 }
1398
1399 static void mac80211_hwsim_bss_info_changed(struct ieee80211_hw *hw,
1400                                             struct ieee80211_vif *vif,
1401                                             struct ieee80211_bss_conf *info,
1402                                             u32 changed)
1403 {
1404         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
1405         struct mac80211_hwsim_data *data = hw->priv;
1406
1407         hwsim_check_magic(vif);
1408
1409         wiphy_debug(hw->wiphy, "%s(changed=0x%x vif->addr=%pM)\n",
1410                     __func__, changed, vif->addr);
1411
1412         if (changed & BSS_CHANGED_BSSID) {
1413                 wiphy_debug(hw->wiphy, "%s: BSSID changed: %pM\n",
1414                             __func__, info->bssid);
1415                 memcpy(vp->bssid, info->bssid, ETH_ALEN);
1416         }
1417
1418         if (changed & BSS_CHANGED_ASSOC) {
1419                 wiphy_debug(hw->wiphy, "  ASSOC: assoc=%d aid=%d\n",
1420                             info->assoc, info->aid);
1421                 vp->assoc = info->assoc;
1422                 vp->aid = info->aid;
1423         }
1424
1425         if (changed & BSS_CHANGED_BEACON_INT) {
1426                 wiphy_debug(hw->wiphy, "  BCNINT: %d\n", info->beacon_int);
1427                 data->beacon_int = info->beacon_int * 1024;
1428         }
1429
1430         if (changed & BSS_CHANGED_BEACON_ENABLED) {
1431                 wiphy_debug(hw->wiphy, "  BCN EN: %d\n", info->enable_beacon);
1432                 vp->bcn_en = info->enable_beacon;
1433                 if (data->started &&
1434                     !hrtimer_is_queued(&data->beacon_timer.timer) &&
1435                     info->enable_beacon) {
1436                         u64 tsf, until_tbtt;
1437                         u32 bcn_int;
1438                         if (WARN_ON(!data->beacon_int))
1439                                 data->beacon_int = 1000 * 1024;
1440                         tsf = mac80211_hwsim_get_tsf(hw, vif);
1441                         bcn_int = data->beacon_int;
1442                         until_tbtt = bcn_int - do_div(tsf, bcn_int);
1443                         tasklet_hrtimer_start(&data->beacon_timer,
1444                                               ns_to_ktime(until_tbtt * 1000),
1445                                               HRTIMER_MODE_REL);
1446                 } else if (!info->enable_beacon) {
1447                         unsigned int count = 0;
1448                         ieee80211_iterate_active_interfaces_atomic(
1449                                 data->hw, IEEE80211_IFACE_ITER_NORMAL,
1450                                 mac80211_hwsim_bcn_en_iter, &count);
1451                         wiphy_debug(hw->wiphy, "  beaconing vifs remaining: %u",
1452                                     count);
1453                         if (count == 0)
1454                                 tasklet_hrtimer_cancel(&data->beacon_timer);
1455                 }
1456         }
1457
1458         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1459                 wiphy_debug(hw->wiphy, "  ERP_CTS_PROT: %d\n",
1460                             info->use_cts_prot);
1461         }
1462
1463         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1464                 wiphy_debug(hw->wiphy, "  ERP_PREAMBLE: %d\n",
1465                             info->use_short_preamble);
1466         }
1467
1468         if (changed & BSS_CHANGED_ERP_SLOT) {
1469                 wiphy_debug(hw->wiphy, "  ERP_SLOT: %d\n", info->use_short_slot);
1470         }
1471
1472         if (changed & BSS_CHANGED_HT) {
1473                 wiphy_debug(hw->wiphy, "  HT: op_mode=0x%x\n",
1474                             info->ht_operation_mode);
1475         }
1476
1477         if (changed & BSS_CHANGED_BASIC_RATES) {
1478                 wiphy_debug(hw->wiphy, "  BASIC_RATES: 0x%llx\n",
1479                             (unsigned long long) info->basic_rates);
1480         }
1481
1482         if (changed & BSS_CHANGED_TXPOWER)
1483                 wiphy_debug(hw->wiphy, "  TX Power: %d dBm\n", info->txpower);
1484 }
1485
1486 static int mac80211_hwsim_sta_add(struct ieee80211_hw *hw,
1487                                   struct ieee80211_vif *vif,
1488                                   struct ieee80211_sta *sta)
1489 {
1490         hwsim_check_magic(vif);
1491         hwsim_set_sta_magic(sta);
1492
1493         return 0;
1494 }
1495
1496 static int mac80211_hwsim_sta_remove(struct ieee80211_hw *hw,
1497                                      struct ieee80211_vif *vif,
1498                                      struct ieee80211_sta *sta)
1499 {
1500         hwsim_check_magic(vif);
1501         hwsim_clear_sta_magic(sta);
1502
1503         return 0;
1504 }
1505
1506 static void mac80211_hwsim_sta_notify(struct ieee80211_hw *hw,
1507                                       struct ieee80211_vif *vif,
1508                                       enum sta_notify_cmd cmd,
1509                                       struct ieee80211_sta *sta)
1510 {
1511         hwsim_check_magic(vif);
1512
1513         switch (cmd) {
1514         case STA_NOTIFY_SLEEP:
1515         case STA_NOTIFY_AWAKE:
1516                 /* TODO: make good use of these flags */
1517                 break;
1518         default:
1519                 WARN(1, "Invalid sta notify: %d\n", cmd);
1520                 break;
1521         }
1522 }
1523
1524 static int mac80211_hwsim_set_tim(struct ieee80211_hw *hw,
1525                                   struct ieee80211_sta *sta,
1526                                   bool set)
1527 {
1528         hwsim_check_sta_magic(sta);
1529         return 0;
1530 }
1531
1532 static int mac80211_hwsim_conf_tx(
1533         struct ieee80211_hw *hw,
1534         struct ieee80211_vif *vif, u16 queue,
1535         const struct ieee80211_tx_queue_params *params)
1536 {
1537         wiphy_debug(hw->wiphy,
1538                     "%s (queue=%d txop=%d cw_min=%d cw_max=%d aifs=%d)\n",
1539                     __func__, queue,
1540                     params->txop, params->cw_min,
1541                     params->cw_max, params->aifs);
1542         return 0;
1543 }
1544
1545 static int mac80211_hwsim_get_survey(
1546         struct ieee80211_hw *hw, int idx,
1547         struct survey_info *survey)
1548 {
1549         struct ieee80211_conf *conf = &hw->conf;
1550
1551         wiphy_debug(hw->wiphy, "%s (idx=%d)\n", __func__, idx);
1552
1553         if (idx != 0)
1554                 return -ENOENT;
1555
1556         /* Current channel */
1557         survey->channel = conf->chandef.chan;
1558
1559         /*
1560          * Magically conjured noise level --- this is only ok for simulated hardware.
1561          *
1562          * A real driver which cannot determine the real channel noise MUST NOT
1563          * report any noise, especially not a magically conjured one :-)
1564          */
1565         survey->filled = SURVEY_INFO_NOISE_DBM;
1566         survey->noise = -92;
1567
1568         return 0;
1569 }
1570
1571 #ifdef CONFIG_NL80211_TESTMODE
1572 /*
1573  * This section contains example code for using netlink
1574  * attributes with the testmode command in nl80211.
1575  */
1576
1577 /* These enums need to be kept in sync with userspace */
1578 enum hwsim_testmode_attr {
1579         __HWSIM_TM_ATTR_INVALID = 0,
1580         HWSIM_TM_ATTR_CMD       = 1,
1581         HWSIM_TM_ATTR_PS        = 2,
1582
1583         /* keep last */
1584         __HWSIM_TM_ATTR_AFTER_LAST,
1585         HWSIM_TM_ATTR_MAX       = __HWSIM_TM_ATTR_AFTER_LAST - 1
1586 };
1587
1588 enum hwsim_testmode_cmd {
1589         HWSIM_TM_CMD_SET_PS             = 0,
1590         HWSIM_TM_CMD_GET_PS             = 1,
1591         HWSIM_TM_CMD_STOP_QUEUES        = 2,
1592         HWSIM_TM_CMD_WAKE_QUEUES        = 3,
1593 };
1594
1595 static const struct nla_policy hwsim_testmode_policy[HWSIM_TM_ATTR_MAX + 1] = {
1596         [HWSIM_TM_ATTR_CMD] = { .type = NLA_U32 },
1597         [HWSIM_TM_ATTR_PS] = { .type = NLA_U32 },
1598 };
1599
1600 static int mac80211_hwsim_testmode_cmd(struct ieee80211_hw *hw,
1601                                        struct ieee80211_vif *vif,
1602                                        void *data, int len)
1603 {
1604         struct mac80211_hwsim_data *hwsim = hw->priv;
1605         struct nlattr *tb[HWSIM_TM_ATTR_MAX + 1];
1606         struct sk_buff *skb;
1607         int err, ps;
1608
1609         err = nla_parse(tb, HWSIM_TM_ATTR_MAX, data, len,
1610                         hwsim_testmode_policy);
1611         if (err)
1612                 return err;
1613
1614         if (!tb[HWSIM_TM_ATTR_CMD])
1615                 return -EINVAL;
1616
1617         switch (nla_get_u32(tb[HWSIM_TM_ATTR_CMD])) {
1618         case HWSIM_TM_CMD_SET_PS:
1619                 if (!tb[HWSIM_TM_ATTR_PS])
1620                         return -EINVAL;
1621                 ps = nla_get_u32(tb[HWSIM_TM_ATTR_PS]);
1622                 return hwsim_fops_ps_write(hwsim, ps);
1623         case HWSIM_TM_CMD_GET_PS:
1624                 skb = cfg80211_testmode_alloc_reply_skb(hw->wiphy,
1625                                                 nla_total_size(sizeof(u32)));
1626                 if (!skb)
1627                         return -ENOMEM;
1628                 if (nla_put_u32(skb, HWSIM_TM_ATTR_PS, hwsim->ps))
1629                         goto nla_put_failure;
1630                 return cfg80211_testmode_reply(skb);
1631         case HWSIM_TM_CMD_STOP_QUEUES:
1632                 ieee80211_stop_queues(hw);
1633                 return 0;
1634         case HWSIM_TM_CMD_WAKE_QUEUES:
1635                 ieee80211_wake_queues(hw);
1636                 return 0;
1637         default:
1638                 return -EOPNOTSUPP;
1639         }
1640
1641  nla_put_failure:
1642         kfree_skb(skb);
1643         return -ENOBUFS;
1644 }
1645 #endif
1646
1647 static int mac80211_hwsim_ampdu_action(struct ieee80211_hw *hw,
1648                                        struct ieee80211_vif *vif,
1649                                        enum ieee80211_ampdu_mlme_action action,
1650                                        struct ieee80211_sta *sta, u16 tid, u16 *ssn,
1651                                        u8 buf_size)
1652 {
1653         switch (action) {
1654         case IEEE80211_AMPDU_TX_START:
1655                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1656                 break;
1657         case IEEE80211_AMPDU_TX_STOP_CONT:
1658         case IEEE80211_AMPDU_TX_STOP_FLUSH:
1659         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
1660                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1661                 break;
1662         case IEEE80211_AMPDU_TX_OPERATIONAL:
1663                 break;
1664         case IEEE80211_AMPDU_RX_START:
1665         case IEEE80211_AMPDU_RX_STOP:
1666                 break;
1667         default:
1668                 return -EOPNOTSUPP;
1669         }
1670
1671         return 0;
1672 }
1673
1674 static void mac80211_hwsim_flush(struct ieee80211_hw *hw, u32 queues, bool drop)
1675 {
1676         /* Not implemented, queues only on kernel side */
1677 }
1678
1679 static void hw_scan_work(struct work_struct *work)
1680 {
1681         struct mac80211_hwsim_data *hwsim =
1682                 container_of(work, struct mac80211_hwsim_data, hw_scan.work);
1683         struct cfg80211_scan_request *req = hwsim->hw_scan_request;
1684         int dwell, i;
1685
1686         mutex_lock(&hwsim->mutex);
1687         if (hwsim->scan_chan_idx >= req->n_channels) {
1688                 wiphy_debug(hwsim->hw->wiphy, "hw scan complete\n");
1689                 ieee80211_scan_completed(hwsim->hw, false);
1690                 hwsim->hw_scan_request = NULL;
1691                 hwsim->hw_scan_vif = NULL;
1692                 hwsim->tmp_chan = NULL;
1693                 mutex_unlock(&hwsim->mutex);
1694                 return;
1695         }
1696
1697         wiphy_debug(hwsim->hw->wiphy, "hw scan %d MHz\n",
1698                     req->channels[hwsim->scan_chan_idx]->center_freq);
1699
1700         hwsim->tmp_chan = req->channels[hwsim->scan_chan_idx];
1701         if (hwsim->tmp_chan->flags & IEEE80211_CHAN_NO_IR ||
1702             !req->n_ssids) {
1703                 dwell = 120;
1704         } else {
1705                 dwell = 30;
1706                 /* send probes */
1707                 for (i = 0; i < req->n_ssids; i++) {
1708                         struct sk_buff *probe;
1709
1710                         probe = ieee80211_probereq_get(hwsim->hw,
1711                                                        hwsim->hw_scan_vif,
1712                                                        req->ssids[i].ssid,
1713                                                        req->ssids[i].ssid_len,
1714                                                        req->ie_len);
1715                         if (!probe)
1716                                 continue;
1717
1718                         if (req->ie_len)
1719                                 memcpy(skb_put(probe, req->ie_len), req->ie,
1720                                        req->ie_len);
1721
1722                         local_bh_disable();
1723                         mac80211_hwsim_tx_frame(hwsim->hw, probe,
1724                                                 hwsim->tmp_chan);
1725                         local_bh_enable();
1726                 }
1727         }
1728         ieee80211_queue_delayed_work(hwsim->hw, &hwsim->hw_scan,
1729                                      msecs_to_jiffies(dwell));
1730         hwsim->scan_chan_idx++;
1731         mutex_unlock(&hwsim->mutex);
1732 }
1733
1734 static int mac80211_hwsim_hw_scan(struct ieee80211_hw *hw,
1735                                   struct ieee80211_vif *vif,
1736                                   struct cfg80211_scan_request *req)
1737 {
1738         struct mac80211_hwsim_data *hwsim = hw->priv;
1739
1740         mutex_lock(&hwsim->mutex);
1741         if (WARN_ON(hwsim->tmp_chan || hwsim->hw_scan_request)) {
1742                 mutex_unlock(&hwsim->mutex);
1743                 return -EBUSY;
1744         }
1745         hwsim->hw_scan_request = req;
1746         hwsim->hw_scan_vif = vif;
1747         hwsim->scan_chan_idx = 0;
1748         mutex_unlock(&hwsim->mutex);
1749
1750         wiphy_debug(hw->wiphy, "hwsim hw_scan request\n");
1751
1752         ieee80211_queue_delayed_work(hwsim->hw, &hwsim->hw_scan, 0);
1753
1754         return 0;
1755 }
1756
1757 static void mac80211_hwsim_cancel_hw_scan(struct ieee80211_hw *hw,
1758                                           struct ieee80211_vif *vif)
1759 {
1760         struct mac80211_hwsim_data *hwsim = hw->priv;
1761
1762         wiphy_debug(hw->wiphy, "hwsim cancel_hw_scan\n");
1763
1764         cancel_delayed_work_sync(&hwsim->hw_scan);
1765
1766         mutex_lock(&hwsim->mutex);
1767         ieee80211_scan_completed(hwsim->hw, true);
1768         hwsim->tmp_chan = NULL;
1769         hwsim->hw_scan_request = NULL;
1770         hwsim->hw_scan_vif = NULL;
1771         mutex_unlock(&hwsim->mutex);
1772 }
1773
1774 static void mac80211_hwsim_sw_scan(struct ieee80211_hw *hw)
1775 {
1776         struct mac80211_hwsim_data *hwsim = hw->priv;
1777
1778         mutex_lock(&hwsim->mutex);
1779
1780         if (hwsim->scanning) {
1781                 printk(KERN_DEBUG "two hwsim sw_scans detected!\n");
1782                 goto out;
1783         }
1784
1785         printk(KERN_DEBUG "hwsim sw_scan request, prepping stuff\n");
1786         hwsim->scanning = true;
1787
1788 out:
1789         mutex_unlock(&hwsim->mutex);
1790 }
1791
1792 static void mac80211_hwsim_sw_scan_complete(struct ieee80211_hw *hw)
1793 {
1794         struct mac80211_hwsim_data *hwsim = hw->priv;
1795
1796         mutex_lock(&hwsim->mutex);
1797
1798         printk(KERN_DEBUG "hwsim sw_scan_complete\n");
1799         hwsim->scanning = false;
1800
1801         mutex_unlock(&hwsim->mutex);
1802 }
1803
1804 static void hw_roc_done(struct work_struct *work)
1805 {
1806         struct mac80211_hwsim_data *hwsim =
1807                 container_of(work, struct mac80211_hwsim_data, roc_done.work);
1808
1809         mutex_lock(&hwsim->mutex);
1810         ieee80211_remain_on_channel_expired(hwsim->hw);
1811         hwsim->tmp_chan = NULL;
1812         mutex_unlock(&hwsim->mutex);
1813
1814         wiphy_debug(hwsim->hw->wiphy, "hwsim ROC expired\n");
1815 }
1816
1817 static int mac80211_hwsim_roc(struct ieee80211_hw *hw,
1818                               struct ieee80211_vif *vif,
1819                               struct ieee80211_channel *chan,
1820                               int duration,
1821                               enum ieee80211_roc_type type)
1822 {
1823         struct mac80211_hwsim_data *hwsim = hw->priv;
1824
1825         mutex_lock(&hwsim->mutex);
1826         if (WARN_ON(hwsim->tmp_chan || hwsim->hw_scan_request)) {
1827                 mutex_unlock(&hwsim->mutex);
1828                 return -EBUSY;
1829         }
1830
1831         hwsim->tmp_chan = chan;
1832         mutex_unlock(&hwsim->mutex);
1833
1834         wiphy_debug(hw->wiphy, "hwsim ROC (%d MHz, %d ms)\n",
1835                     chan->center_freq, duration);
1836
1837         ieee80211_ready_on_channel(hw);
1838
1839         ieee80211_queue_delayed_work(hw, &hwsim->roc_done,
1840                                      msecs_to_jiffies(duration));
1841         return 0;
1842 }
1843
1844 static int mac80211_hwsim_croc(struct ieee80211_hw *hw)
1845 {
1846         struct mac80211_hwsim_data *hwsim = hw->priv;
1847
1848         cancel_delayed_work_sync(&hwsim->roc_done);
1849
1850         mutex_lock(&hwsim->mutex);
1851         hwsim->tmp_chan = NULL;
1852         mutex_unlock(&hwsim->mutex);
1853
1854         wiphy_debug(hw->wiphy, "hwsim ROC canceled\n");
1855
1856         return 0;
1857 }
1858
1859 static int mac80211_hwsim_add_chanctx(struct ieee80211_hw *hw,
1860                                       struct ieee80211_chanctx_conf *ctx)
1861 {
1862         hwsim_set_chanctx_magic(ctx);
1863         wiphy_debug(hw->wiphy,
1864                     "add channel context control: %d MHz/width: %d/cfreqs:%d/%d MHz\n",
1865                     ctx->def.chan->center_freq, ctx->def.width,
1866                     ctx->def.center_freq1, ctx->def.center_freq2);
1867         return 0;
1868 }
1869
1870 static void mac80211_hwsim_remove_chanctx(struct ieee80211_hw *hw,
1871                                           struct ieee80211_chanctx_conf *ctx)
1872 {
1873         wiphy_debug(hw->wiphy,
1874                     "remove channel context control: %d MHz/width: %d/cfreqs:%d/%d MHz\n",
1875                     ctx->def.chan->center_freq, ctx->def.width,
1876                     ctx->def.center_freq1, ctx->def.center_freq2);
1877         hwsim_check_chanctx_magic(ctx);
1878         hwsim_clear_chanctx_magic(ctx);
1879 }
1880
1881 static void mac80211_hwsim_change_chanctx(struct ieee80211_hw *hw,
1882                                           struct ieee80211_chanctx_conf *ctx,
1883                                           u32 changed)
1884 {
1885         hwsim_check_chanctx_magic(ctx);
1886         wiphy_debug(hw->wiphy,
1887                     "change channel context control: %d MHz/width: %d/cfreqs:%d/%d MHz\n",
1888                     ctx->def.chan->center_freq, ctx->def.width,
1889                     ctx->def.center_freq1, ctx->def.center_freq2);
1890 }
1891
1892 static int mac80211_hwsim_assign_vif_chanctx(struct ieee80211_hw *hw,
1893                                              struct ieee80211_vif *vif,
1894                                              struct ieee80211_chanctx_conf *ctx)
1895 {
1896         hwsim_check_magic(vif);
1897         hwsim_check_chanctx_magic(ctx);
1898
1899         return 0;
1900 }
1901
1902 static void mac80211_hwsim_unassign_vif_chanctx(struct ieee80211_hw *hw,
1903                                                 struct ieee80211_vif *vif,
1904                                                 struct ieee80211_chanctx_conf *ctx)
1905 {
1906         hwsim_check_magic(vif);
1907         hwsim_check_chanctx_magic(ctx);
1908 }
1909
1910 static const struct ieee80211_ops mac80211_hwsim_ops = {
1911         .tx = mac80211_hwsim_tx,
1912         .start = mac80211_hwsim_start,
1913         .stop = mac80211_hwsim_stop,
1914         .add_interface = mac80211_hwsim_add_interface,
1915         .change_interface = mac80211_hwsim_change_interface,
1916         .remove_interface = mac80211_hwsim_remove_interface,
1917         .config = mac80211_hwsim_config,
1918         .configure_filter = mac80211_hwsim_configure_filter,
1919         .bss_info_changed = mac80211_hwsim_bss_info_changed,
1920         .sta_add = mac80211_hwsim_sta_add,
1921         .sta_remove = mac80211_hwsim_sta_remove,
1922         .sta_notify = mac80211_hwsim_sta_notify,
1923         .set_tim = mac80211_hwsim_set_tim,
1924         .conf_tx = mac80211_hwsim_conf_tx,
1925         .get_survey = mac80211_hwsim_get_survey,
1926         CFG80211_TESTMODE_CMD(mac80211_hwsim_testmode_cmd)
1927         .ampdu_action = mac80211_hwsim_ampdu_action,
1928         .sw_scan_start = mac80211_hwsim_sw_scan,
1929         .sw_scan_complete = mac80211_hwsim_sw_scan_complete,
1930         .flush = mac80211_hwsim_flush,
1931         .get_tsf = mac80211_hwsim_get_tsf,
1932         .set_tsf = mac80211_hwsim_set_tsf,
1933 };
1934
1935 static struct ieee80211_ops mac80211_hwsim_mchan_ops;
1936
1937 static int mac80211_hwsim_create_radio(int channels, const char *reg_alpha2,
1938                                        const struct ieee80211_regdomain *regd,
1939                                        bool reg_strict)
1940 {
1941         int err;
1942         u8 addr[ETH_ALEN];
1943         struct mac80211_hwsim_data *data;
1944         struct ieee80211_hw *hw;
1945         enum ieee80211_band band;
1946         const struct ieee80211_ops *ops = &mac80211_hwsim_ops;
1947         int idx;
1948
1949         spin_lock_bh(&hwsim_radio_lock);
1950         idx = hwsim_radio_idx++;
1951         spin_unlock_bh(&hwsim_radio_lock);
1952
1953         if (channels > 1)
1954                 ops = &mac80211_hwsim_mchan_ops;
1955         hw = ieee80211_alloc_hw(sizeof(*data), ops);
1956         if (!hw) {
1957                 printk(KERN_DEBUG "mac80211_hwsim: ieee80211_alloc_hw failed\n");
1958                 err = -ENOMEM;
1959                 goto failed;
1960         }
1961         data = hw->priv;
1962         data->hw = hw;
1963
1964         data->dev = device_create(hwsim_class, NULL, 0, hw, "hwsim%d", idx);
1965         if (IS_ERR(data->dev)) {
1966                 printk(KERN_DEBUG
1967                        "mac80211_hwsim: device_create failed (%ld)\n",
1968                        PTR_ERR(data->dev));
1969                 err = -ENOMEM;
1970                 goto failed_drvdata;
1971         }
1972         data->dev->driver = &mac80211_hwsim_driver.driver;
1973         err = device_bind_driver(data->dev);
1974         if (err != 0) {
1975                 printk(KERN_DEBUG "mac80211_hwsim: device_bind_driver failed (%d)\n",
1976                        err);
1977                 goto failed_hw;
1978         }
1979
1980         skb_queue_head_init(&data->pending);
1981
1982         SET_IEEE80211_DEV(hw, data->dev);
1983         memset(addr, 0, ETH_ALEN);
1984         addr[0] = 0x02;
1985         addr[3] = idx >> 8;
1986         addr[4] = idx;
1987         memcpy(data->addresses[0].addr, addr, ETH_ALEN);
1988         memcpy(data->addresses[1].addr, addr, ETH_ALEN);
1989         data->addresses[1].addr[0] |= 0x40;
1990         hw->wiphy->n_addresses = 2;
1991         hw->wiphy->addresses = data->addresses;
1992
1993         data->channels = channels;
1994         data->idx = idx;
1995
1996         if (data->channels > 1) {
1997                 hw->wiphy->max_scan_ssids = 255;
1998                 hw->wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1999                 hw->wiphy->max_remain_on_channel_duration = 1000;
2000                 /* For channels > 1 DFS is not allowed */
2001                 hw->wiphy->n_iface_combinations = 1;
2002                 hw->wiphy->iface_combinations = &data->if_combination;
2003                 data->if_combination = hwsim_if_comb[0];
2004                 data->if_combination.num_different_channels = data->channels;
2005         } else {
2006                 hw->wiphy->iface_combinations = hwsim_if_comb;
2007                 hw->wiphy->n_iface_combinations = ARRAY_SIZE(hwsim_if_comb);
2008         }
2009
2010         INIT_DELAYED_WORK(&data->roc_done, hw_roc_done);
2011         INIT_DELAYED_WORK(&data->hw_scan, hw_scan_work);
2012
2013         hw->queues = 5;
2014         hw->offchannel_tx_hw_queue = 4;
2015         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
2016                                      BIT(NL80211_IFTYPE_AP) |
2017                                      BIT(NL80211_IFTYPE_P2P_CLIENT) |
2018                                      BIT(NL80211_IFTYPE_P2P_GO) |
2019                                      BIT(NL80211_IFTYPE_ADHOC) |
2020                                      BIT(NL80211_IFTYPE_MESH_POINT) |
2021                                      BIT(NL80211_IFTYPE_P2P_DEVICE);
2022
2023         hw->flags = IEEE80211_HW_MFP_CAPABLE |
2024                     IEEE80211_HW_SIGNAL_DBM |
2025                     IEEE80211_HW_SUPPORTS_STATIC_SMPS |
2026                     IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
2027                     IEEE80211_HW_AMPDU_AGGREGATION |
2028                     IEEE80211_HW_WANT_MONITOR_VIF |
2029                     IEEE80211_HW_QUEUE_CONTROL |
2030                     IEEE80211_HW_SUPPORTS_HT_CCK_RATES;
2031         if (rctbl)
2032                 hw->flags |= IEEE80211_HW_SUPPORTS_RC_TABLE;
2033
2034         hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS |
2035                             WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL |
2036                             WIPHY_FLAG_AP_UAPSD;
2037         hw->wiphy->features |= NL80211_FEATURE_ACTIVE_MONITOR;
2038
2039         /* ask mac80211 to reserve space for magic */
2040         hw->vif_data_size = sizeof(struct hwsim_vif_priv);
2041         hw->sta_data_size = sizeof(struct hwsim_sta_priv);
2042         hw->chanctx_data_size = sizeof(struct hwsim_chanctx_priv);
2043
2044         memcpy(data->channels_2ghz, hwsim_channels_2ghz,
2045                 sizeof(hwsim_channels_2ghz));
2046         memcpy(data->channels_5ghz, hwsim_channels_5ghz,
2047                 sizeof(hwsim_channels_5ghz));
2048         memcpy(data->rates, hwsim_rates, sizeof(hwsim_rates));
2049
2050         for (band = IEEE80211_BAND_2GHZ; band < IEEE80211_NUM_BANDS; band++) {
2051                 struct ieee80211_supported_band *sband = &data->bands[band];
2052                 switch (band) {
2053                 case IEEE80211_BAND_2GHZ:
2054                         sband->channels = data->channels_2ghz;
2055                         sband->n_channels = ARRAY_SIZE(hwsim_channels_2ghz);
2056                         sband->bitrates = data->rates;
2057                         sband->n_bitrates = ARRAY_SIZE(hwsim_rates);
2058                         break;
2059                 case IEEE80211_BAND_5GHZ:
2060                         sband->channels = data->channels_5ghz;
2061                         sband->n_channels = ARRAY_SIZE(hwsim_channels_5ghz);
2062                         sband->bitrates = data->rates + 4;
2063                         sband->n_bitrates = ARRAY_SIZE(hwsim_rates) - 4;
2064                         break;
2065                 default:
2066                         continue;
2067                 }
2068
2069                 sband->ht_cap.ht_supported = true;
2070                 sband->ht_cap.cap = IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
2071                                     IEEE80211_HT_CAP_GRN_FLD |
2072                                     IEEE80211_HT_CAP_SGI_40 |
2073                                     IEEE80211_HT_CAP_DSSSCCK40;
2074                 sband->ht_cap.ampdu_factor = 0x3;
2075                 sband->ht_cap.ampdu_density = 0x6;
2076                 memset(&sband->ht_cap.mcs, 0,
2077                        sizeof(sband->ht_cap.mcs));
2078                 sband->ht_cap.mcs.rx_mask[0] = 0xff;
2079                 sband->ht_cap.mcs.rx_mask[1] = 0xff;
2080                 sband->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
2081
2082                 hw->wiphy->bands[band] = sband;
2083
2084                 sband->vht_cap.vht_supported = true;
2085                 sband->vht_cap.cap =
2086                         IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454 |
2087                         IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ |
2088                         IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ |
2089                         IEEE80211_VHT_CAP_RXLDPC |
2090                         IEEE80211_VHT_CAP_SHORT_GI_80 |
2091                         IEEE80211_VHT_CAP_SHORT_GI_160 |
2092                         IEEE80211_VHT_CAP_TXSTBC |
2093                         IEEE80211_VHT_CAP_RXSTBC_1 |
2094                         IEEE80211_VHT_CAP_RXSTBC_2 |
2095                         IEEE80211_VHT_CAP_RXSTBC_3 |
2096                         IEEE80211_VHT_CAP_RXSTBC_4 |
2097                         IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
2098                 sband->vht_cap.vht_mcs.rx_mcs_map =
2099                         cpu_to_le16(IEEE80211_VHT_MCS_SUPPORT_0_8 << 0 |
2100                                     IEEE80211_VHT_MCS_SUPPORT_0_8 << 2 |
2101                                     IEEE80211_VHT_MCS_SUPPORT_0_9 << 4 |
2102                                     IEEE80211_VHT_MCS_SUPPORT_0_8 << 6 |
2103                                     IEEE80211_VHT_MCS_SUPPORT_0_8 << 8 |
2104                                     IEEE80211_VHT_MCS_SUPPORT_0_9 << 10 |
2105                                     IEEE80211_VHT_MCS_SUPPORT_0_9 << 12 |
2106                                     IEEE80211_VHT_MCS_SUPPORT_0_8 << 14);
2107                 sband->vht_cap.vht_mcs.tx_mcs_map =
2108                         sband->vht_cap.vht_mcs.rx_mcs_map;
2109         }
2110
2111         /* By default all radios belong to the first group */
2112         data->group = 1;
2113         mutex_init(&data->mutex);
2114
2115         /* Enable frame retransmissions for lossy channels */
2116         hw->max_rates = 4;
2117         hw->max_rate_tries = 11;
2118
2119         if (reg_strict)
2120                 hw->wiphy->regulatory_flags |= REGULATORY_STRICT_REG;
2121         if (regd) {
2122                 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG;
2123                 wiphy_apply_custom_regulatory(hw->wiphy, regd);
2124                 /* give the regulatory workqueue a chance to run */
2125                 schedule_timeout_interruptible(1);
2126         }
2127
2128         err = ieee80211_register_hw(hw);
2129         if (err < 0) {
2130                 printk(KERN_DEBUG "mac80211_hwsim: ieee80211_register_hw failed (%d)\n",
2131                        err);
2132                 goto failed_hw;
2133         }
2134
2135         wiphy_debug(hw->wiphy, "hwaddr %pM registered\n", hw->wiphy->perm_addr);
2136
2137         if (reg_alpha2)
2138                 regulatory_hint(hw->wiphy, reg_alpha2);
2139
2140         data->debugfs = debugfs_create_dir("hwsim", hw->wiphy->debugfsdir);
2141         debugfs_create_file("ps", 0666, data->debugfs, data, &hwsim_fops_ps);
2142         debugfs_create_file("group", 0666, data->debugfs, data,
2143                             &hwsim_fops_group);
2144         if (data->channels == 1)
2145                 debugfs_create_file("dfs_simulate_radar", 0222,
2146                                     data->debugfs,
2147                                     data, &hwsim_simulate_radar);
2148
2149         tasklet_hrtimer_init(&data->beacon_timer,
2150                              mac80211_hwsim_beacon,
2151                              CLOCK_MONOTONIC_RAW, HRTIMER_MODE_ABS);
2152
2153         spin_lock_bh(&hwsim_radio_lock);
2154         list_add_tail(&data->list, &hwsim_radios);
2155         spin_unlock_bh(&hwsim_radio_lock);
2156
2157         return idx;
2158
2159 failed_hw:
2160         device_unregister(data->dev);
2161 failed_drvdata:
2162         ieee80211_free_hw(hw);
2163 failed:
2164         return err;
2165 }
2166
2167 static void mac80211_hwsim_destroy_radio(struct mac80211_hwsim_data *data)
2168 {
2169         debugfs_remove_recursive(data->debugfs);
2170         ieee80211_unregister_hw(data->hw);
2171         device_release_driver(data->dev);
2172         device_unregister(data->dev);
2173         ieee80211_free_hw(data->hw);
2174 }
2175
2176 static void mac80211_hwsim_free(void)
2177 {
2178         struct mac80211_hwsim_data *data;
2179
2180         spin_lock_bh(&hwsim_radio_lock);
2181         while ((data = list_first_entry_or_null(&hwsim_radios,
2182                                                 struct mac80211_hwsim_data,
2183                                                 list))) {
2184                 list_del(&data->list);
2185                 spin_unlock_bh(&hwsim_radio_lock);
2186                 mac80211_hwsim_destroy_radio(data);
2187                 spin_lock_bh(&hwsim_radio_lock);
2188         }
2189         spin_unlock_bh(&hwsim_radio_lock);
2190         class_destroy(hwsim_class);
2191 }
2192
2193 static const struct net_device_ops hwsim_netdev_ops = {
2194         .ndo_start_xmit         = hwsim_mon_xmit,
2195         .ndo_change_mtu         = eth_change_mtu,
2196         .ndo_set_mac_address    = eth_mac_addr,
2197         .ndo_validate_addr      = eth_validate_addr,
2198 };
2199
2200 static void hwsim_mon_setup(struct net_device *dev)
2201 {
2202         dev->netdev_ops = &hwsim_netdev_ops;
2203         dev->destructor = free_netdev;
2204         ether_setup(dev);
2205         dev->tx_queue_len = 0;
2206         dev->type = ARPHRD_IEEE80211_RADIOTAP;
2207         memset(dev->dev_addr, 0, ETH_ALEN);
2208         dev->dev_addr[0] = 0x12;
2209 }
2210
2211 static struct mac80211_hwsim_data *get_hwsim_data_ref_from_addr(const u8 *addr)
2212 {
2213         struct mac80211_hwsim_data *data;
2214         bool _found = false;
2215
2216         spin_lock_bh(&hwsim_radio_lock);
2217         list_for_each_entry(data, &hwsim_radios, list) {
2218                 if (memcmp(data->addresses[1].addr, addr, ETH_ALEN) == 0) {
2219                         _found = true;
2220                         break;
2221                 }
2222         }
2223         spin_unlock_bh(&hwsim_radio_lock);
2224
2225         if (!_found)
2226                 return NULL;
2227
2228         return data;
2229 }
2230
2231 static int hwsim_tx_info_frame_received_nl(struct sk_buff *skb_2,
2232                                            struct genl_info *info)
2233 {
2234
2235         struct ieee80211_hdr *hdr;
2236         struct mac80211_hwsim_data *data2;
2237         struct ieee80211_tx_info *txi;
2238         struct hwsim_tx_rate *tx_attempts;
2239         unsigned long ret_skb_ptr;
2240         struct sk_buff *skb, *tmp;
2241         const u8 *src;
2242         unsigned int hwsim_flags;
2243         int i;
2244         bool found = false;
2245
2246         if (info->snd_portid != wmediumd_portid)
2247                 return -EINVAL;
2248
2249         if (!info->attrs[HWSIM_ATTR_ADDR_TRANSMITTER] ||
2250             !info->attrs[HWSIM_ATTR_FLAGS] ||
2251             !info->attrs[HWSIM_ATTR_COOKIE] ||
2252             !info->attrs[HWSIM_ATTR_TX_INFO])
2253                 goto out;
2254
2255         src = (void *)nla_data(info->attrs[HWSIM_ATTR_ADDR_TRANSMITTER]);
2256         hwsim_flags = nla_get_u32(info->attrs[HWSIM_ATTR_FLAGS]);
2257         ret_skb_ptr = nla_get_u64(info->attrs[HWSIM_ATTR_COOKIE]);
2258
2259         data2 = get_hwsim_data_ref_from_addr(src);
2260         if (!data2)
2261                 goto out;
2262
2263         /* look for the skb matching the cookie passed back from user */
2264         skb_queue_walk_safe(&data2->pending, skb, tmp) {
2265                 if ((unsigned long)skb == ret_skb_ptr) {
2266                         skb_unlink(skb, &data2->pending);
2267                         found = true;
2268                         break;
2269                 }
2270         }
2271
2272         /* not found */
2273         if (!found)
2274                 goto out;
2275
2276         /* Tx info received because the frame was broadcasted on user space,
2277          so we get all the necessary info: tx attempts and skb control buff */
2278
2279         tx_attempts = (struct hwsim_tx_rate *)nla_data(
2280                        info->attrs[HWSIM_ATTR_TX_INFO]);
2281
2282         /* now send back TX status */
2283         txi = IEEE80211_SKB_CB(skb);
2284
2285         ieee80211_tx_info_clear_status(txi);
2286
2287         for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
2288                 txi->status.rates[i].idx = tx_attempts[i].idx;
2289                 txi->status.rates[i].count = tx_attempts[i].count;
2290                 /*txi->status.rates[i].flags = 0;*/
2291         }
2292
2293         txi->status.ack_signal = nla_get_u32(info->attrs[HWSIM_ATTR_SIGNAL]);
2294
2295         if (!(hwsim_flags & HWSIM_TX_CTL_NO_ACK) &&
2296            (hwsim_flags & HWSIM_TX_STAT_ACK)) {
2297                 if (skb->len >= 16) {
2298                         hdr = (struct ieee80211_hdr *) skb->data;
2299                         mac80211_hwsim_monitor_ack(data2->channel,
2300                                                    hdr->addr2);
2301                 }
2302                 txi->flags |= IEEE80211_TX_STAT_ACK;
2303         }
2304         ieee80211_tx_status_irqsafe(data2->hw, skb);
2305         return 0;
2306 out:
2307         return -EINVAL;
2308
2309 }
2310
2311 static int hwsim_cloned_frame_received_nl(struct sk_buff *skb_2,
2312                                           struct genl_info *info)
2313 {
2314
2315         struct mac80211_hwsim_data *data2;
2316         struct ieee80211_rx_status rx_status;
2317         const u8 *dst;
2318         int frame_data_len;
2319         void *frame_data;
2320         struct sk_buff *skb = NULL;
2321
2322         if (info->snd_portid != wmediumd_portid)
2323                 return -EINVAL;
2324
2325         if (!info->attrs[HWSIM_ATTR_ADDR_RECEIVER] ||
2326             !info->attrs[HWSIM_ATTR_FRAME] ||
2327             !info->attrs[HWSIM_ATTR_RX_RATE] ||
2328             !info->attrs[HWSIM_ATTR_SIGNAL])
2329                 goto out;
2330
2331         dst = (void *)nla_data(info->attrs[HWSIM_ATTR_ADDR_RECEIVER]);
2332         frame_data_len = nla_len(info->attrs[HWSIM_ATTR_FRAME]);
2333         frame_data = (void *)nla_data(info->attrs[HWSIM_ATTR_FRAME]);
2334
2335         /* Allocate new skb here */
2336         skb = alloc_skb(frame_data_len, GFP_KERNEL);
2337         if (skb == NULL)
2338                 goto err;
2339
2340         if (frame_data_len > IEEE80211_MAX_DATA_LEN)
2341                 goto err;
2342
2343         /* Copy the data */
2344         memcpy(skb_put(skb, frame_data_len), frame_data, frame_data_len);
2345
2346         data2 = get_hwsim_data_ref_from_addr(dst);
2347         if (!data2)
2348                 goto out;
2349
2350         /* check if radio is configured properly */
2351
2352         if (data2->idle || !data2->started)
2353                 goto out;
2354
2355         /* A frame is received from user space */
2356         memset(&rx_status, 0, sizeof(rx_status));
2357         rx_status.freq = data2->channel->center_freq;
2358         rx_status.band = data2->channel->band;
2359         rx_status.rate_idx = nla_get_u32(info->attrs[HWSIM_ATTR_RX_RATE]);
2360         rx_status.signal = nla_get_u32(info->attrs[HWSIM_ATTR_SIGNAL]);
2361
2362         memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
2363         ieee80211_rx_irqsafe(data2->hw, skb);
2364
2365         return 0;
2366 err:
2367         printk(KERN_DEBUG "mac80211_hwsim: error occurred in %s\n", __func__);
2368         goto out;
2369 out:
2370         dev_kfree_skb(skb);
2371         return -EINVAL;
2372 }
2373
2374 static int hwsim_register_received_nl(struct sk_buff *skb_2,
2375                                       struct genl_info *info)
2376 {
2377         struct mac80211_hwsim_data *data;
2378         int chans = 1;
2379
2380         spin_lock_bh(&hwsim_radio_lock);
2381         list_for_each_entry(data, &hwsim_radios, list)
2382                 chans = max(chans, data->channels);
2383         spin_unlock_bh(&hwsim_radio_lock);
2384
2385         /* In the future we should revise the userspace API and allow it
2386          * to set a flag that it does support multi-channel, then we can
2387          * let this pass conditionally on the flag.
2388          * For current userspace, prohibit it since it won't work right.
2389          */
2390         if (chans > 1)
2391                 return -EOPNOTSUPP;
2392
2393         if (wmediumd_portid)
2394                 return -EBUSY;
2395
2396         wmediumd_portid = info->snd_portid;
2397
2398         printk(KERN_DEBUG "mac80211_hwsim: received a REGISTER, "
2399                "switching to wmediumd mode with pid %d\n", info->snd_portid);
2400
2401         return 0;
2402 }
2403
2404 static int hwsim_create_radio_nl(struct sk_buff *msg, struct genl_info *info)
2405 {
2406         unsigned int chans = channels;
2407         const char *alpha2 = NULL;
2408         const struct ieee80211_regdomain *regd = NULL;
2409         bool reg_strict = info->attrs[HWSIM_ATTR_REG_STRICT_REG];
2410
2411         if (info->attrs[HWSIM_ATTR_CHANNELS])
2412                 chans = nla_get_u32(info->attrs[HWSIM_ATTR_CHANNELS]);
2413
2414         if (info->attrs[HWSIM_ATTR_REG_HINT_ALPHA2])
2415                 alpha2 = nla_data(info->attrs[HWSIM_ATTR_REG_HINT_ALPHA2]);
2416
2417         if (info->attrs[HWSIM_ATTR_REG_CUSTOM_REG]) {
2418                 u32 idx = nla_get_u32(info->attrs[HWSIM_ATTR_REG_CUSTOM_REG]);
2419
2420                 if (idx >= ARRAY_SIZE(hwsim_world_regdom_custom))
2421                         return -EINVAL;
2422                 regd = hwsim_world_regdom_custom[idx];
2423         }
2424
2425         return mac80211_hwsim_create_radio(chans, alpha2, regd, reg_strict);
2426 }
2427
2428 static int hwsim_destroy_radio_nl(struct sk_buff *msg, struct genl_info *info)
2429 {
2430         struct mac80211_hwsim_data *data;
2431         int idx;
2432
2433         if (!info->attrs[HWSIM_ATTR_RADIO_ID])
2434                 return -EINVAL;
2435         idx = nla_get_u32(info->attrs[HWSIM_ATTR_RADIO_ID]);
2436
2437         spin_lock_bh(&hwsim_radio_lock);
2438         list_for_each_entry(data, &hwsim_radios, list) {
2439                 if (data->idx != idx)
2440                         continue;
2441                 list_del(&data->list);
2442                 spin_unlock_bh(&hwsim_radio_lock);
2443                 mac80211_hwsim_destroy_radio(data);
2444                 return 0;
2445         }
2446         spin_unlock_bh(&hwsim_radio_lock);
2447
2448         return -ENODEV;
2449 }
2450
2451 /* Generic Netlink operations array */
2452 static const struct genl_ops hwsim_ops[] = {
2453         {
2454                 .cmd = HWSIM_CMD_REGISTER,
2455                 .policy = hwsim_genl_policy,
2456                 .doit = hwsim_register_received_nl,
2457                 .flags = GENL_ADMIN_PERM,
2458         },
2459         {
2460                 .cmd = HWSIM_CMD_FRAME,
2461                 .policy = hwsim_genl_policy,
2462                 .doit = hwsim_cloned_frame_received_nl,
2463         },
2464         {
2465                 .cmd = HWSIM_CMD_TX_INFO_FRAME,
2466                 .policy = hwsim_genl_policy,
2467                 .doit = hwsim_tx_info_frame_received_nl,
2468         },
2469         {
2470                 .cmd = HWSIM_CMD_CREATE_RADIO,
2471                 .policy = hwsim_genl_policy,
2472                 .doit = hwsim_create_radio_nl,
2473                 .flags = GENL_ADMIN_PERM,
2474         },
2475         {
2476                 .cmd = HWSIM_CMD_DESTROY_RADIO,
2477                 .policy = hwsim_genl_policy,
2478                 .doit = hwsim_destroy_radio_nl,
2479                 .flags = GENL_ADMIN_PERM,
2480         },
2481 };
2482
2483 static int mac80211_hwsim_netlink_notify(struct notifier_block *nb,
2484                                          unsigned long state,
2485                                          void *_notify)
2486 {
2487         struct netlink_notify *notify = _notify;
2488
2489         if (state != NETLINK_URELEASE)
2490                 return NOTIFY_DONE;
2491
2492         if (notify->portid == wmediumd_portid) {
2493                 printk(KERN_INFO "mac80211_hwsim: wmediumd released netlink"
2494                        " socket, switching to perfect channel medium\n");
2495                 wmediumd_portid = 0;
2496         }
2497         return NOTIFY_DONE;
2498
2499 }
2500
2501 static struct notifier_block hwsim_netlink_notifier = {
2502         .notifier_call = mac80211_hwsim_netlink_notify,
2503 };
2504
2505 static int hwsim_init_netlink(void)
2506 {
2507         int rc;
2508
2509         printk(KERN_INFO "mac80211_hwsim: initializing netlink\n");
2510
2511         rc = genl_register_family_with_ops(&hwsim_genl_family, hwsim_ops);
2512         if (rc)
2513                 goto failure;
2514
2515         rc = netlink_register_notifier(&hwsim_netlink_notifier);
2516         if (rc)
2517                 goto failure;
2518
2519         return 0;
2520
2521 failure:
2522         printk(KERN_DEBUG "mac80211_hwsim: error occurred in %s\n", __func__);
2523         return -EINVAL;
2524 }
2525
2526 static void hwsim_exit_netlink(void)
2527 {
2528         /* unregister the notifier */
2529         netlink_unregister_notifier(&hwsim_netlink_notifier);
2530         /* unregister the family */
2531         genl_unregister_family(&hwsim_genl_family);
2532 }
2533
2534 static int __init init_mac80211_hwsim(void)
2535 {
2536         int i, err;
2537
2538         if (radios < 0 || radios > 100)
2539                 return -EINVAL;
2540
2541         if (channels < 1)
2542                 return -EINVAL;
2543
2544         mac80211_hwsim_mchan_ops = mac80211_hwsim_ops;
2545         mac80211_hwsim_mchan_ops.hw_scan = mac80211_hwsim_hw_scan;
2546         mac80211_hwsim_mchan_ops.cancel_hw_scan = mac80211_hwsim_cancel_hw_scan;
2547         mac80211_hwsim_mchan_ops.sw_scan_start = NULL;
2548         mac80211_hwsim_mchan_ops.sw_scan_complete = NULL;
2549         mac80211_hwsim_mchan_ops.remain_on_channel = mac80211_hwsim_roc;
2550         mac80211_hwsim_mchan_ops.cancel_remain_on_channel = mac80211_hwsim_croc;
2551         mac80211_hwsim_mchan_ops.add_chanctx = mac80211_hwsim_add_chanctx;
2552         mac80211_hwsim_mchan_ops.remove_chanctx = mac80211_hwsim_remove_chanctx;
2553         mac80211_hwsim_mchan_ops.change_chanctx = mac80211_hwsim_change_chanctx;
2554         mac80211_hwsim_mchan_ops.assign_vif_chanctx =
2555                 mac80211_hwsim_assign_vif_chanctx;
2556         mac80211_hwsim_mchan_ops.unassign_vif_chanctx =
2557                 mac80211_hwsim_unassign_vif_chanctx;
2558
2559         spin_lock_init(&hwsim_radio_lock);
2560         INIT_LIST_HEAD(&hwsim_radios);
2561
2562         err = platform_driver_register(&mac80211_hwsim_driver);
2563         if (err)
2564                 return err;
2565
2566         hwsim_class = class_create(THIS_MODULE, "mac80211_hwsim");
2567         if (IS_ERR(hwsim_class)) {
2568                 err = PTR_ERR(hwsim_class);
2569                 goto out_unregister_driver;
2570         }
2571
2572         for (i = 0; i < radios; i++) {
2573                 const char *reg_alpha2 = NULL;
2574                 const struct ieee80211_regdomain *regd = NULL;
2575                 bool reg_strict = false;
2576
2577                 switch (regtest) {
2578                 case HWSIM_REGTEST_DIFF_COUNTRY:
2579                         if (i < ARRAY_SIZE(hwsim_alpha2s))
2580                                 reg_alpha2 = hwsim_alpha2s[i];
2581                         break;
2582                 case HWSIM_REGTEST_DRIVER_REG_FOLLOW:
2583                         if (!i)
2584                                 reg_alpha2 = hwsim_alpha2s[0];
2585                         break;
2586                 case HWSIM_REGTEST_STRICT_ALL:
2587                         reg_strict = true;
2588                 case HWSIM_REGTEST_DRIVER_REG_ALL:
2589                         reg_alpha2 = hwsim_alpha2s[0];
2590                         break;
2591                 case HWSIM_REGTEST_WORLD_ROAM:
2592                         if (i == 0)
2593                                 regd = &hwsim_world_regdom_custom_01;
2594                         break;
2595                 case HWSIM_REGTEST_CUSTOM_WORLD:
2596                         regd = &hwsim_world_regdom_custom_01;
2597                         break;
2598                 case HWSIM_REGTEST_CUSTOM_WORLD_2:
2599                         if (i == 0)
2600                                 regd = &hwsim_world_regdom_custom_01;
2601                         else if (i == 1)
2602                                 regd = &hwsim_world_regdom_custom_02;
2603                         break;
2604                 case HWSIM_REGTEST_STRICT_FOLLOW:
2605                         if (i == 0) {
2606                                 reg_strict = true;
2607                                 reg_alpha2 = hwsim_alpha2s[0];
2608                         }
2609                         break;
2610                 case HWSIM_REGTEST_STRICT_AND_DRIVER_REG:
2611                         if (i == 0) {
2612                                 reg_strict = true;
2613                                 reg_alpha2 = hwsim_alpha2s[0];
2614                         } else if (i == 1) {
2615                                 reg_alpha2 = hwsim_alpha2s[1];
2616                         }
2617                         break;
2618                 case HWSIM_REGTEST_ALL:
2619                         switch (i) {
2620                         case 0:
2621                                 regd = &hwsim_world_regdom_custom_01;
2622                                 break;
2623                         case 1:
2624                                 regd = &hwsim_world_regdom_custom_02;
2625                                 break;
2626                         case 2:
2627                                 reg_alpha2 = hwsim_alpha2s[0];
2628                                 break;
2629                         case 3:
2630                                 reg_alpha2 = hwsim_alpha2s[1];
2631                                 break;
2632                         case 4:
2633                                 reg_strict = true;
2634                                 reg_alpha2 = hwsim_alpha2s[2];
2635                                 break;
2636                         }
2637                         break;
2638                 default:
2639                         break;
2640                 }
2641
2642                 err = mac80211_hwsim_create_radio(channels, reg_alpha2,
2643                                                   regd, reg_strict);
2644                 if (err < 0)
2645                         goto out_free_radios;
2646         }
2647
2648         hwsim_mon = alloc_netdev(0, "hwsim%d", hwsim_mon_setup);
2649         if (hwsim_mon == NULL) {
2650                 err = -ENOMEM;
2651                 goto out_free_radios;
2652         }
2653
2654         rtnl_lock();
2655         err = dev_alloc_name(hwsim_mon, hwsim_mon->name);
2656         if (err < 0) {
2657                 rtnl_unlock();
2658                 goto out_free_radios;
2659         }
2660
2661         err = register_netdevice(hwsim_mon);
2662         if (err < 0) {
2663                 rtnl_unlock();
2664                 goto out_free_mon;
2665         }
2666         rtnl_unlock();
2667
2668         err = hwsim_init_netlink();
2669         if (err < 0)
2670                 goto out_free_mon;
2671
2672         return 0;
2673
2674 out_free_mon:
2675         free_netdev(hwsim_mon);
2676 out_free_radios:
2677         mac80211_hwsim_free();
2678 out_unregister_driver:
2679         platform_driver_unregister(&mac80211_hwsim_driver);
2680         return err;
2681 }
2682 module_init(init_mac80211_hwsim);
2683
2684 static void __exit exit_mac80211_hwsim(void)
2685 {
2686         printk(KERN_DEBUG "mac80211_hwsim: unregister radios\n");
2687
2688         hwsim_exit_netlink();
2689
2690         mac80211_hwsim_free();
2691         unregister_netdev(hwsim_mon);
2692         platform_driver_unregister(&mac80211_hwsim_driver);
2693 }
2694 module_exit(exit_mac80211_hwsim);