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 <net/net_namespace.h>
  34 #include <net/netns/generic.h>
  35 #include "mac80211_hwsim.h"
  36
  37 #define WARN_QUEUE 100
  38 #define MAX_QUEUE 200
  39
  40 MODULE_AUTHOR("Jouni Malinen");
  41 MODULE_DESCRIPTION("Software simulator of 802.11 radio(s) for mac80211");
  42 MODULE_LICENSE("GPL");
  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 static bool support_p2p_device = true;
  61 module_param(support_p2p_device, bool, 0444);
  62 MODULE_PARM_DESC(support_p2p_device, "Support P2P-Device interface type");
  63
  64 /**
  65  * enum hwsim_regtest - the type of regulatory tests we offer
  66  *
  67  * These are the different values you can use for the regtest
  68  * module parameter. This is useful to help test world roaming
  69  * and the driver regulatory_hint() call and combinations of these.
  70  * If you want to do specific alpha2 regulatory domain tests simply
  71  * use the userspace regulatory request as that will be respected as
  72  * well without the need of this module parameter. This is designed
  73  * only for testing the driver regulatory request, world roaming
  74  * and all possible combinations.
  75  *
  76  * @HWSIM_REGTEST_DISABLED: No regulatory tests are performed,
  77  *      this is the default value.
  78  * @HWSIM_REGTEST_DRIVER_REG_FOLLOW: Used for testing the driver regulatory
  79  *      hint, only one driver regulatory hint will be sent as such the
  80  *      secondary radios are expected to follow.
  81  * @HWSIM_REGTEST_DRIVER_REG_ALL: Used for testing the driver regulatory
  82  *      request with all radios reporting the same regulatory domain.
  83  * @HWSIM_REGTEST_DIFF_COUNTRY: Used for testing the drivers calling
  84  *      different regulatory domains requests. Expected behaviour is for
  85  *      an intersection to occur but each device will still use their
  86  *      respective regulatory requested domains. Subsequent radios will
  87  *      use the resulting intersection.
  88  * @HWSIM_REGTEST_WORLD_ROAM: Used for testing the world roaming. We accomplish
  89  *      this by using a custom beacon-capable regulatory domain for the first
  90  *      radio. All other device world roam.
  91  * @HWSIM_REGTEST_CUSTOM_WORLD: Used for testing the custom world regulatory
  92  *      domain requests. All radios will adhere to this custom world regulatory
  93  *      domain.
  94  * @HWSIM_REGTEST_CUSTOM_WORLD_2: Used for testing 2 custom world regulatory
  95  *      domain requests. The first radio will adhere to the first custom world
  96  *      regulatory domain, the second one to the second custom world regulatory
  97  *      domain. All other devices will world roam.
  98  * @HWSIM_REGTEST_STRICT_FOLLOW_: Used for testing strict regulatory domain
  99  *      settings, only the first radio will send a regulatory domain request
 100  *      and use strict settings. The rest of the radios are expected to follow.
 101  * @HWSIM_REGTEST_STRICT_ALL: Used for testing strict regulatory domain
 102  *      settings. All radios will adhere to this.
 103  * @HWSIM_REGTEST_STRICT_AND_DRIVER_REG: Used for testing strict regulatory
 104  *      domain settings, combined with secondary driver regulatory domain
 105  *      settings. The first radio will get a strict regulatory domain setting
 106  *      using the first driver regulatory request and the second radio will use
 107  *      non-strict settings using the second driver regulatory request. All
 108  *      other devices should follow the intersection created between the
 109  *      first two.
 110  * @HWSIM_REGTEST_ALL: Used for testing every possible mix. You will need
 111  *      at least 6 radios for a complete test. We will test in this order:
 112  *      1 - driver custom world regulatory domain
 113  *      2 - second custom world regulatory domain
 114  *      3 - first driver regulatory domain request
 115  *      4 - second driver regulatory domain request
 116  *      5 - strict regulatory domain settings using the third driver regulatory
 117  *          domain request
 118  *      6 and on - should follow the intersection of the 3rd, 4rth and 5th radio
 119  *                 regulatory requests.
 120  */
 121 enum hwsim_regtest {
 122         HWSIM_REGTEST_DISABLED = 0,
 123         HWSIM_REGTEST_DRIVER_REG_FOLLOW = 1,
 124         HWSIM_REGTEST_DRIVER_REG_ALL = 2,
 125         HWSIM_REGTEST_DIFF_COUNTRY = 3,
 126         HWSIM_REGTEST_WORLD_ROAM = 4,
 127         HWSIM_REGTEST_CUSTOM_WORLD = 5,
 128         HWSIM_REGTEST_CUSTOM_WORLD_2 = 6,
 129         HWSIM_REGTEST_STRICT_FOLLOW = 7,
 130         HWSIM_REGTEST_STRICT_ALL = 8,
 131         HWSIM_REGTEST_STRICT_AND_DRIVER_REG = 9,
 132         HWSIM_REGTEST_ALL = 10,
 133 };
 134
 135 /* Set to one of the HWSIM_REGTEST_* values above */
 136 static int regtest = HWSIM_REGTEST_DISABLED;
 137 module_param(regtest, int, 0444);
 138 MODULE_PARM_DESC(regtest, "The type of regulatory test we want to run");
 139
 140 static const char *hwsim_alpha2s[] = {
 141         "FI",
 142         "AL",
 143         "US",
 144         "DE",
 145         "JP",
 146         "AL",
 147 };
 148
 149 static const struct ieee80211_regdomain hwsim_world_regdom_custom_01 = {
 150         .n_reg_rules = 4,
 151         .alpha2 =  "99",
 152         .reg_rules = {
 153                 REG_RULE(2412-10, 2462+10, 40, 0, 20, 0),
 154                 REG_RULE(2484-10, 2484+10, 40, 0, 20, 0),
 155                 REG_RULE(5150-10, 5240+10, 40, 0, 30, 0),
 156                 REG_RULE(5745-10, 5825+10, 40, 0, 30, 0),
 157         }
 158 };
 159
 160 static const struct ieee80211_regdomain hwsim_world_regdom_custom_02 = {
 161         .n_reg_rules = 2,
 162         .alpha2 =  "99",
 163         .reg_rules = {
 164                 REG_RULE(2412-10, 2462+10, 40, 0, 20, 0),
 165                 REG_RULE(5725-10, 5850+10, 40, 0, 30,
 166                          NL80211_RRF_NO_IR),
 167         }
 168 };
 169
 170 static const struct ieee80211_regdomain *hwsim_world_regdom_custom[] = {
 171         &hwsim_world_regdom_custom_01,
 172         &hwsim_world_regdom_custom_02,
 173 };
 174
 175 struct hwsim_vif_priv {
 176         u32 magic;
 177         u8 bssid[ETH_ALEN];
 178         bool assoc;
 179         bool bcn_en;
 180         u16 aid;
 181 };
 182
 183 #define HWSIM_VIF_MAGIC 0x69537748
 184
 185 static inline void hwsim_check_magic(struct ieee80211_vif *vif)
 186 {
 187         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 188         WARN(vp->magic != HWSIM_VIF_MAGIC,
 189              "Invalid VIF (%p) magic %#x, %pM, %d/%d\n",
 190              vif, vp->magic, vif->addr, vif->type, vif->p2p);
 191 }
 192
 193 static inline void hwsim_set_magic(struct ieee80211_vif *vif)
 194 {
 195         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 196         vp->magic = HWSIM_VIF_MAGIC;
 197 }
 198
 199 static inline void hwsim_clear_magic(struct ieee80211_vif *vif)
 200 {
 201         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 202         vp->magic = 0;
 203 }
 204
 205 struct hwsim_sta_priv {
 206         u32 magic;
 207 };
 208
 209 #define HWSIM_STA_MAGIC 0x6d537749
 210
 211 static inline void hwsim_check_sta_magic(struct ieee80211_sta *sta)
 212 {
 213         struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
 214         WARN_ON(sp->magic != HWSIM_STA_MAGIC);
 215 }
 216
 217 static inline void hwsim_set_sta_magic(struct ieee80211_sta *sta)
 218 {
 219         struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
 220         sp->magic = HWSIM_STA_MAGIC;
 221 }
 222
 223 static inline void hwsim_clear_sta_magic(struct ieee80211_sta *sta)
 224 {
 225         struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
 226         sp->magic = 0;
 227 }
 228
 229 struct hwsim_chanctx_priv {
 230         u32 magic;
 231 };
 232
 233 #define HWSIM_CHANCTX_MAGIC 0x6d53774a
 234
 235 static inline void hwsim_check_chanctx_magic(struct ieee80211_chanctx_conf *c)
 236 {
 237         struct hwsim_chanctx_priv *cp = (void *)c->drv_priv;
 238         WARN_ON(cp->magic != HWSIM_CHANCTX_MAGIC);
 239 }
 240
 241 static inline void hwsim_set_chanctx_magic(struct ieee80211_chanctx_conf *c)
 242 {
 243         struct hwsim_chanctx_priv *cp = (void *)c->drv_priv;
 244         cp->magic = HWSIM_CHANCTX_MAGIC;
 245 }
 246
 247 static inline void hwsim_clear_chanctx_magic(struct ieee80211_chanctx_conf *c)
 248 {
 249         struct hwsim_chanctx_priv *cp = (void *)c->drv_priv;
 250         cp->magic = 0;
 251 }
 252
 253 static unsigned int hwsim_net_id;
 254
 255 static int hwsim_netgroup;
 256
 257 struct hwsim_net {
 258         int netgroup;
 259         u32 wmediumd;
 260 };
 261
 262 static inline int hwsim_net_get_netgroup(struct net *net)
 263 {
 264         struct hwsim_net *hwsim_net = net_generic(net, hwsim_net_id);
 265
 266         return hwsim_net->netgroup;
 267 }
 268
 269 static inline void hwsim_net_set_netgroup(struct net *net)
 270 {
 271         struct hwsim_net *hwsim_net = net_generic(net, hwsim_net_id);
 272
 273         hwsim_net->netgroup = hwsim_netgroup++;
 274 }
 275
 276 static inline u32 hwsim_net_get_wmediumd(struct net *net)
 277 {
 278         struct hwsim_net *hwsim_net = net_generic(net, hwsim_net_id);
 279
 280         return hwsim_net->wmediumd;
 281 }
 282
 283 static inline void hwsim_net_set_wmediumd(struct net *net, u32 portid)
 284 {
 285         struct hwsim_net *hwsim_net = net_generic(net, hwsim_net_id);
 286
 287         hwsim_net->wmediumd = portid;
 288 }
 289
 290 static struct class *hwsim_class;
 291
 292 static struct net_device *hwsim_mon; /* global monitor netdev */
 293
 294 #define CHAN2G(_freq)  { \
 295         .band = NL80211_BAND_2GHZ, \
 296         .center_freq = (_freq), \
 297         .hw_value = (_freq), \
 298         .max_power = 20, \
 299 }
 300
 301 #define CHAN5G(_freq) { \
 302         .band = NL80211_BAND_5GHZ, \
 303         .center_freq = (_freq), \
 304         .hw_value = (_freq), \
 305         .max_power = 20, \
 306 }
 307
 308 static const struct ieee80211_channel hwsim_channels_2ghz[] = {
 309         CHAN2G(2412), /* Channel 1 */
 310         CHAN2G(2417), /* Channel 2 */
 311         CHAN2G(2422), /* Channel 3 */
 312         CHAN2G(2427), /* Channel 4 */
 313         CHAN2G(2432), /* Channel 5 */
 314         CHAN2G(2437), /* Channel 6 */
 315         CHAN2G(2442), /* Channel 7 */
 316         CHAN2G(2447), /* Channel 8 */
 317         CHAN2G(2452), /* Channel 9 */
 318         CHAN2G(2457), /* Channel 10 */
 319         CHAN2G(2462), /* Channel 11 */
 320         CHAN2G(2467), /* Channel 12 */
 321         CHAN2G(2472), /* Channel 13 */
 322         CHAN2G(2484), /* Channel 14 */
 323 };
 324
 325 static const struct ieee80211_channel hwsim_channels_5ghz[] = {
 326         CHAN5G(5180), /* Channel 36 */
 327         CHAN5G(5200), /* Channel 40 */
 328         CHAN5G(5220), /* Channel 44 */
 329         CHAN5G(5240), /* Channel 48 */
 330
 331         CHAN5G(5260), /* Channel 52 */
 332         CHAN5G(5280), /* Channel 56 */
 333         CHAN5G(5300), /* Channel 60 */
 334         CHAN5G(5320), /* Channel 64 */
 335
 336         CHAN5G(5500), /* Channel 100 */
 337         CHAN5G(5520), /* Channel 104 */
 338         CHAN5G(5540), /* Channel 108 */
 339         CHAN5G(5560), /* Channel 112 */
 340         CHAN5G(5580), /* Channel 116 */
 341         CHAN5G(5600), /* Channel 120 */
 342         CHAN5G(5620), /* Channel 124 */
 343         CHAN5G(5640), /* Channel 128 */
 344         CHAN5G(5660), /* Channel 132 */
 345         CHAN5G(5680), /* Channel 136 */
 346         CHAN5G(5700), /* Channel 140 */
 347
 348         CHAN5G(5745), /* Channel 149 */
 349         CHAN5G(5765), /* Channel 153 */
 350         CHAN5G(5785), /* Channel 157 */
 351         CHAN5G(5805), /* Channel 161 */
 352         CHAN5G(5825), /* Channel 165 */
 353         CHAN5G(5845), /* Channel 169 */
 354 };
 355
 356 static const struct ieee80211_rate hwsim_rates[] = {
 357         { .bitrate = 10 },
 358         { .bitrate = 20, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
 359         { .bitrate = 55, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
 360         { .bitrate = 110, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
 361         { .bitrate = 60 },
 362         { .bitrate = 90 },
 363         { .bitrate = 120 },
 364         { .bitrate = 180 },
 365         { .bitrate = 240 },
 366         { .bitrate = 360 },
 367         { .bitrate = 480 },
 368         { .bitrate = 540 }
 369 };
 370
 371 #define OUI_QCA 0x001374
 372 #define QCA_NL80211_SUBCMD_TEST 1
 373 enum qca_nl80211_vendor_subcmds {
 374         QCA_WLAN_VENDOR_ATTR_TEST = 8,
 375         QCA_WLAN_VENDOR_ATTR_MAX = QCA_WLAN_VENDOR_ATTR_TEST
 376 };
 377
 378 static const struct nla_policy
 379 hwsim_vendor_test_policy[QCA_WLAN_VENDOR_ATTR_MAX + 1] = {
 380         [QCA_WLAN_VENDOR_ATTR_MAX] = { .type = NLA_U32 },
 381 };
 382
 383 static int mac80211_hwsim_vendor_cmd_test(struct wiphy *wiphy,
 384                                           struct wireless_dev *wdev,
 385                                           const void *data, int data_len)
 386 {
 387         struct sk_buff *skb;
 388         struct nlattr *tb[QCA_WLAN_VENDOR_ATTR_MAX + 1];
 389         int err;
 390         u32 val;
 391
 392         err = nla_parse(tb, QCA_WLAN_VENDOR_ATTR_MAX, data, data_len,
 393                         hwsim_vendor_test_policy, NULL);
 394         if (err)
 395                 return err;
 396         if (!tb[QCA_WLAN_VENDOR_ATTR_TEST])
 397                 return -EINVAL;
 398         val = nla_get_u32(tb[QCA_WLAN_VENDOR_ATTR_TEST]);
 399         wiphy_dbg(wiphy, "%s: test=%u\n", __func__, val);
 400
 401         /* Send a vendor event as a test. Note that this would not normally be
 402          * done within a command handler, but rather, based on some other
 403          * trigger. For simplicity, this command is used to trigger the event
 404          * here.
 405          *
 406          * event_idx = 0 (index in mac80211_hwsim_vendor_commands)
 407          */
 408         skb = cfg80211_vendor_event_alloc(wiphy, wdev, 100, 0, GFP_KERNEL);
 409         if (skb) {
 410                 /* skb_put() or nla_put() will fill up data within
 411                  * NL80211_ATTR_VENDOR_DATA.
 412                  */
 413
 414                 /* Add vendor data */
 415                 nla_put_u32(skb, QCA_WLAN_VENDOR_ATTR_TEST, val + 1);
 416
 417                 /* Send the event - this will call nla_nest_end() */
 418                 cfg80211_vendor_event(skb, GFP_KERNEL);
 419         }
 420
 421         /* Send a response to the command */
 422         skb = cfg80211_vendor_cmd_alloc_reply_skb(wiphy, 10);
 423         if (!skb)
 424                 return -ENOMEM;
 425
 426         /* skb_put() or nla_put() will fill up data within
 427          * NL80211_ATTR_VENDOR_DATA
 428          */
 429         nla_put_u32(skb, QCA_WLAN_VENDOR_ATTR_TEST, val + 2);
 430
 431         return cfg80211_vendor_cmd_reply(skb);
 432 }
 433
 434 static struct wiphy_vendor_command mac80211_hwsim_vendor_commands[] = {
 435         {
 436                 .info = { .vendor_id = OUI_QCA,
 437                           .subcmd = QCA_NL80211_SUBCMD_TEST },
 438                 .flags = WIPHY_VENDOR_CMD_NEED_NETDEV,
 439                 .doit = mac80211_hwsim_vendor_cmd_test,
 440         }
 441 };
 442
 443 /* Advertise support vendor specific events */
 444 static const struct nl80211_vendor_cmd_info mac80211_hwsim_vendor_events[] = {
 445         { .vendor_id = OUI_QCA, .subcmd = 1 },
 446 };
 447
 448 static const struct ieee80211_iface_limit hwsim_if_limits[] = {
 449         { .max = 1, .types = BIT(NL80211_IFTYPE_ADHOC) },
 450         { .max = 2048,  .types = BIT(NL80211_IFTYPE_STATION) |
 451                                  BIT(NL80211_IFTYPE_P2P_CLIENT) |
 452 #ifdef CONFIG_MAC80211_MESH
 453                                  BIT(NL80211_IFTYPE_MESH_POINT) |
 454 #endif
 455                                  BIT(NL80211_IFTYPE_AP) |
 456                                  BIT(NL80211_IFTYPE_P2P_GO) },
 457         /* must be last, see hwsim_if_comb */
 458         { .max = 1, .types = BIT(NL80211_IFTYPE_P2P_DEVICE) }
 459 };
 460
 461 static const struct ieee80211_iface_combination hwsim_if_comb[] = {
 462         {
 463                 .limits = hwsim_if_limits,
 464                 /* remove the last entry which is P2P_DEVICE */
 465                 .n_limits = ARRAY_SIZE(hwsim_if_limits) - 1,
 466                 .max_interfaces = 2048,
 467                 .num_different_channels = 1,
 468                 .radar_detect_widths = BIT(NL80211_CHAN_WIDTH_20_NOHT) |
 469                                        BIT(NL80211_CHAN_WIDTH_20) |
 470                                        BIT(NL80211_CHAN_WIDTH_40) |
 471                                        BIT(NL80211_CHAN_WIDTH_80) |
 472                                        BIT(NL80211_CHAN_WIDTH_160),
 473         },
 474 };
 475
 476 static const struct ieee80211_iface_combination hwsim_if_comb_p2p_dev[] = {
 477         {
 478                 .limits = hwsim_if_limits,
 479                 .n_limits = ARRAY_SIZE(hwsim_if_limits),
 480                 .max_interfaces = 2048,
 481                 .num_different_channels = 1,
 482                 .radar_detect_widths = BIT(NL80211_CHAN_WIDTH_20_NOHT) |
 483                                        BIT(NL80211_CHAN_WIDTH_20) |
 484                                        BIT(NL80211_CHAN_WIDTH_40) |
 485                                        BIT(NL80211_CHAN_WIDTH_80) |
 486                                        BIT(NL80211_CHAN_WIDTH_160),
 487         },
 488 };
 489
 490 static spinlock_t hwsim_radio_lock;
 491 static LIST_HEAD(hwsim_radios);
 492 static struct workqueue_struct *hwsim_wq;
 493 static int hwsim_radio_idx;
 494
 495 static struct platform_driver mac80211_hwsim_driver = {
 496         .driver = {
 497                 .name = "mac80211_hwsim",
 498         },
 499 };
 500
 501 struct mac80211_hwsim_data {
 502         struct list_head list;
 503         struct ieee80211_hw *hw;
 504         struct device *dev;
 505         struct ieee80211_supported_band bands[NUM_NL80211_BANDS];
 506         struct ieee80211_channel channels_2ghz[ARRAY_SIZE(hwsim_channels_2ghz)];
 507         struct ieee80211_channel channels_5ghz[ARRAY_SIZE(hwsim_channels_5ghz)];
 508         struct ieee80211_rate rates[ARRAY_SIZE(hwsim_rates)];
 509         struct ieee80211_iface_combination if_combination;
 510
 511         struct mac_address addresses[2];
 512         int channels, idx;
 513         bool use_chanctx;
 514         bool destroy_on_close;
 515         struct work_struct destroy_work;
 516         u32 portid;
 517         char alpha2[2];
 518         const struct ieee80211_regdomain *regd;
 519
 520         struct ieee80211_channel *tmp_chan;
 521         struct ieee80211_channel *roc_chan;
 522         u32 roc_duration;
 523         struct delayed_work roc_start;
 524         struct delayed_work roc_done;
 525         struct delayed_work hw_scan;
 526         struct cfg80211_scan_request *hw_scan_request;
 527         struct ieee80211_vif *hw_scan_vif;
 528         int scan_chan_idx;
 529         u8 scan_addr[ETH_ALEN];
 530         struct {
 531                 struct ieee80211_channel *channel;
 532                 unsigned long next_start, start, end;
 533         } survey_data[ARRAY_SIZE(hwsim_channels_2ghz) +
 534                       ARRAY_SIZE(hwsim_channels_5ghz)];
 535
 536         struct ieee80211_channel *channel;
 537         u64 beacon_int  /* beacon interval in us */;
 538         unsigned int rx_filter;
 539         bool started, idle, scanning;
 540         struct mutex mutex;
 541         struct tasklet_hrtimer beacon_timer;
 542         enum ps_mode {
 543                 PS_DISABLED, PS_ENABLED, PS_AUTO_POLL, PS_MANUAL_POLL
 544         } ps;
 545         bool ps_poll_pending;
 546         struct dentry *debugfs;
 547
 548         uintptr_t pending_cookie;
 549         struct sk_buff_head pending;    /* packets pending */
 550         /*
 551          * Only radios in the same group can communicate together (the
 552          * channel has to match too). Each bit represents a group. A
 553          * radio can be in more than one group.
 554          */
 555         u64 group;
 556
 557         /* group shared by radios created in the same netns */
 558         int netgroup;
 559         /* wmediumd portid responsible for netgroup of this radio */
 560         u32 wmediumd;
 561
 562         /* difference between this hw's clock and the real clock, in usecs */
 563         s64 tsf_offset;
 564         s64 bcn_delta;
 565         /* absolute beacon transmission time. Used to cover up "tx" delay. */
 566         u64 abs_bcn_ts;
 567
 568         /* Stats */
 569         u64 tx_pkts;
 570         u64 rx_pkts;
 571         u64 tx_bytes;
 572         u64 rx_bytes;
 573         u64 tx_dropped;
 574         u64 tx_failed;
 575 };
 576
 577
 578 struct hwsim_radiotap_hdr {
 579         struct ieee80211_radiotap_header hdr;
 580         __le64 rt_tsft;
 581         u8 rt_flags;
 582         u8 rt_rate;
 583         __le16 rt_channel;
 584         __le16 rt_chbitmask;
 585 } __packed;
 586
 587 struct hwsim_radiotap_ack_hdr {
 588         struct ieee80211_radiotap_header hdr;
 589         u8 rt_flags;
 590         u8 pad;
 591         __le16 rt_channel;
 592         __le16 rt_chbitmask;
 593 } __packed;
 594
 595 /* MAC80211_HWSIM netlink family */
 596 static struct genl_family hwsim_genl_family;
 597
 598 enum hwsim_multicast_groups {
 599         HWSIM_MCGRP_CONFIG,
 600 };
 601
 602 static const struct genl_multicast_group hwsim_mcgrps[] = {
 603         [HWSIM_MCGRP_CONFIG] = { .name = "config", },
 604 };
 605
 606 /* MAC80211_HWSIM netlink policy */
 607
 608 static const struct nla_policy hwsim_genl_policy[HWSIM_ATTR_MAX + 1] = {
 609         [HWSIM_ATTR_ADDR_RECEIVER] = { .type = NLA_UNSPEC, .len = ETH_ALEN },
 610         [HWSIM_ATTR_ADDR_TRANSMITTER] = { .type = NLA_UNSPEC, .len = ETH_ALEN },
 611         [HWSIM_ATTR_FRAME] = { .type = NLA_BINARY,
 612                                .len = IEEE80211_MAX_DATA_LEN },
 613         [HWSIM_ATTR_FLAGS] = { .type = NLA_U32 },
 614         [HWSIM_ATTR_RX_RATE] = { .type = NLA_U32 },
 615         [HWSIM_ATTR_SIGNAL] = { .type = NLA_U32 },
 616         [HWSIM_ATTR_TX_INFO] = { .type = NLA_UNSPEC,
 617                                  .len = IEEE80211_TX_MAX_RATES *
 618                                         sizeof(struct hwsim_tx_rate)},
 619         [HWSIM_ATTR_COOKIE] = { .type = NLA_U64 },
 620         [HWSIM_ATTR_CHANNELS] = { .type = NLA_U32 },
 621         [HWSIM_ATTR_RADIO_ID] = { .type = NLA_U32 },
 622         [HWSIM_ATTR_REG_HINT_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 623         [HWSIM_ATTR_REG_CUSTOM_REG] = { .type = NLA_U32 },
 624         [HWSIM_ATTR_REG_STRICT_REG] = { .type = NLA_FLAG },
 625         [HWSIM_ATTR_SUPPORT_P2P_DEVICE] = { .type = NLA_FLAG },
 626         [HWSIM_ATTR_DESTROY_RADIO_ON_CLOSE] = { .type = NLA_FLAG },
 627         [HWSIM_ATTR_RADIO_NAME] = { .type = NLA_STRING },
 628         [HWSIM_ATTR_NO_VIF] = { .type = NLA_FLAG },
 629         [HWSIM_ATTR_FREQ] = { .type = NLA_U32 },
 630 };
 631
 632 static void mac80211_hwsim_tx_frame(struct ieee80211_hw *hw,
 633                                     struct sk_buff *skb,
 634                                     struct ieee80211_channel *chan);
 635
 636 /* sysfs attributes */
 637 static void hwsim_send_ps_poll(void *dat, u8 *mac, struct ieee80211_vif *vif)
 638 {
 639         struct mac80211_hwsim_data *data = dat;
 640         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 641         struct sk_buff *skb;
 642         struct ieee80211_pspoll *pspoll;
 643
 644         if (!vp->assoc)
 645                 return;
 646
 647         wiphy_dbg(data->hw->wiphy,
 648                   "%s: send PS-Poll to %pM for aid %d\n",
 649                   __func__, vp->bssid, vp->aid);
 650
 651         skb = dev_alloc_skb(sizeof(*pspoll));
 652         if (!skb)
 653                 return;
 654         pspoll = skb_put(skb, sizeof(*pspoll));
 655         pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
 656                                             IEEE80211_STYPE_PSPOLL |
 657                                             IEEE80211_FCTL_PM);
 658         pspoll->aid = cpu_to_le16(0xc000 | vp->aid);
 659         memcpy(pspoll->bssid, vp->bssid, ETH_ALEN);
 660         memcpy(pspoll->ta, mac, ETH_ALEN);
 661
 662         rcu_read_lock();
 663         mac80211_hwsim_tx_frame(data->hw, skb,
 664                                 rcu_dereference(vif->chanctx_conf)->def.chan);
 665         rcu_read_unlock();
 666 }
 667
 668 static void hwsim_send_nullfunc(struct mac80211_hwsim_data *data, u8 *mac,
 669                                 struct ieee80211_vif *vif, int ps)
 670 {
 671         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 672         struct sk_buff *skb;
 673         struct ieee80211_hdr *hdr;
 674
 675         if (!vp->assoc)
 676                 return;
 677
 678         wiphy_dbg(data->hw->wiphy,
 679                   "%s: send data::nullfunc to %pM ps=%d\n",
 680                   __func__, vp->bssid, ps);
 681
 682         skb = dev_alloc_skb(sizeof(*hdr));
 683         if (!skb)
 684                 return;
 685         hdr = skb_put(skb, sizeof(*hdr) - ETH_ALEN);
 686         hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
 687                                          IEEE80211_STYPE_NULLFUNC |
 688                                          IEEE80211_FCTL_TODS |
 689                                          (ps ? IEEE80211_FCTL_PM : 0));
 690         hdr->duration_id = cpu_to_le16(0);
 691         memcpy(hdr->addr1, vp->bssid, ETH_ALEN);
 692         memcpy(hdr->addr2, mac, ETH_ALEN);
 693         memcpy(hdr->addr3, vp->bssid, ETH_ALEN);
 694
 695         rcu_read_lock();
 696         mac80211_hwsim_tx_frame(data->hw, skb,
 697                                 rcu_dereference(vif->chanctx_conf)->def.chan);
 698         rcu_read_unlock();
 699 }
 700
 701
 702 static void hwsim_send_nullfunc_ps(void *dat, u8 *mac,
 703                                    struct ieee80211_vif *vif)
 704 {
 705         struct mac80211_hwsim_data *data = dat;
 706         hwsim_send_nullfunc(data, mac, vif, 1);
 707 }
 708
 709 static void hwsim_send_nullfunc_no_ps(void *dat, u8 *mac,
 710                                       struct ieee80211_vif *vif)
 711 {
 712         struct mac80211_hwsim_data *data = dat;
 713         hwsim_send_nullfunc(data, mac, vif, 0);
 714 }
 715
 716 static int hwsim_fops_ps_read(void *dat, u64 *val)
 717 {
 718         struct mac80211_hwsim_data *data = dat;
 719         *val = data->ps;
 720         return 0;
 721 }
 722
 723 static int hwsim_fops_ps_write(void *dat, u64 val)
 724 {
 725         struct mac80211_hwsim_data *data = dat;
 726         enum ps_mode old_ps;
 727
 728         if (val != PS_DISABLED && val != PS_ENABLED && val != PS_AUTO_POLL &&
 729             val != PS_MANUAL_POLL)
 730                 return -EINVAL;
 731
 732         old_ps = data->ps;
 733         data->ps = val;
 734
 735         local_bh_disable();
 736         if (val == PS_MANUAL_POLL) {
 737                 ieee80211_iterate_active_interfaces_atomic(
 738                         data->hw, IEEE80211_IFACE_ITER_NORMAL,
 739                         hwsim_send_ps_poll, data);
 740                 data->ps_poll_pending = true;
 741         } else if (old_ps == PS_DISABLED && val != PS_DISABLED) {
 742                 ieee80211_iterate_active_interfaces_atomic(
 743                         data->hw, IEEE80211_IFACE_ITER_NORMAL,
 744                         hwsim_send_nullfunc_ps, data);
 745         } else if (old_ps != PS_DISABLED && val == PS_DISABLED) {
 746                 ieee80211_iterate_active_interfaces_atomic(
 747                         data->hw, IEEE80211_IFACE_ITER_NORMAL,
 748                         hwsim_send_nullfunc_no_ps, data);
 749         }
 750         local_bh_enable();
 751
 752         return 0;
 753 }
 754
 755 DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_ps, hwsim_fops_ps_read, hwsim_fops_ps_write,
 756                         "%llu\n");
 757
 758 static int hwsim_write_simulate_radar(void *dat, u64 val)
 759 {
 760         struct mac80211_hwsim_data *data = dat;
 761
 762         ieee80211_radar_detected(data->hw);
 763
 764         return 0;
 765 }
 766
 767 DEFINE_SIMPLE_ATTRIBUTE(hwsim_simulate_radar, NULL,
 768                         hwsim_write_simulate_radar, "%llu\n");
 769
 770 static int hwsim_fops_group_read(void *dat, u64 *val)
 771 {
 772         struct mac80211_hwsim_data *data = dat;
 773         *val = data->group;
 774         return 0;
 775 }
 776
 777 static int hwsim_fops_group_write(void *dat, u64 val)
 778 {
 779         struct mac80211_hwsim_data *data = dat;
 780         data->group = val;
 781         return 0;
 782 }
 783
 784 DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_group,
 785                         hwsim_fops_group_read, hwsim_fops_group_write,
 786                         "%llx\n");
 787
 788 static netdev_tx_t hwsim_mon_xmit(struct sk_buff *skb,
 789                                         struct net_device *dev)
 790 {
 791         /* TODO: allow packet injection */
 792         dev_kfree_skb(skb);
 793         return NETDEV_TX_OK;
 794 }
 795
 796 static inline u64 mac80211_hwsim_get_tsf_raw(void)
 797 {
 798         return ktime_to_us(ktime_get_real());
 799 }
 800
 801 static __le64 __mac80211_hwsim_get_tsf(struct mac80211_hwsim_data *data)
 802 {
 803         u64 now = mac80211_hwsim_get_tsf_raw();
 804         return cpu_to_le64(now + data->tsf_offset);
 805 }
 806
 807 static u64 mac80211_hwsim_get_tsf(struct ieee80211_hw *hw,
 808                                   struct ieee80211_vif *vif)
 809 {
 810         struct mac80211_hwsim_data *data = hw->priv;
 811         return le64_to_cpu(__mac80211_hwsim_get_tsf(data));
 812 }
 813
 814 static void mac80211_hwsim_set_tsf(struct ieee80211_hw *hw,
 815                 struct ieee80211_vif *vif, u64 tsf)
 816 {
 817         struct mac80211_hwsim_data *data = hw->priv;
 818         u64 now = mac80211_hwsim_get_tsf(hw, vif);
 819         u32 bcn_int = data->beacon_int;
 820         u64 delta = abs(tsf - now);
 821
 822         /* adjust after beaconing with new timestamp at old TBTT */
 823         if (tsf > now) {
 824                 data->tsf_offset += delta;
 825                 data->bcn_delta = do_div(delta, bcn_int);
 826         } else {
 827                 data->tsf_offset -= delta;
 828                 data->bcn_delta = -(s64)do_div(delta, bcn_int);
 829         }
 830 }
 831
 832 static void mac80211_hwsim_monitor_rx(struct ieee80211_hw *hw,
 833                                       struct sk_buff *tx_skb,
 834                                       struct ieee80211_channel *chan)
 835 {
 836         struct mac80211_hwsim_data *data = hw->priv;
 837         struct sk_buff *skb;
 838         struct hwsim_radiotap_hdr *hdr;
 839         u16 flags;
 840         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_skb);
 841         struct ieee80211_rate *txrate = ieee80211_get_tx_rate(hw, info);
 842
 843         if (WARN_ON(!txrate))
 844                 return;
 845
 846         if (!netif_running(hwsim_mon))
 847                 return;
 848
 849         skb = skb_copy_expand(tx_skb, sizeof(*hdr), 0, GFP_ATOMIC);
 850         if (skb == NULL)
 851                 return;
 852
 853         hdr = skb_push(skb, sizeof(*hdr));
 854         hdr->hdr.it_version = PKTHDR_RADIOTAP_VERSION;
 855         hdr->hdr.it_pad = 0;
 856         hdr->hdr.it_len = cpu_to_le16(sizeof(*hdr));
 857         hdr->hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
 858                                           (1 << IEEE80211_RADIOTAP_RATE) |
 859                                           (1 << IEEE80211_RADIOTAP_TSFT) |
 860                                           (1 << IEEE80211_RADIOTAP_CHANNEL));
 861         hdr->rt_tsft = __mac80211_hwsim_get_tsf(data);
 862         hdr->rt_flags = 0;
 863         hdr->rt_rate = txrate->bitrate / 5;
 864         hdr->rt_channel = cpu_to_le16(chan->center_freq);
 865         flags = IEEE80211_CHAN_2GHZ;
 866         if (txrate->flags & IEEE80211_RATE_ERP_G)
 867                 flags |= IEEE80211_CHAN_OFDM;
 868         else
 869                 flags |= IEEE80211_CHAN_CCK;
 870         hdr->rt_chbitmask = cpu_to_le16(flags);
 871
 872         skb->dev = hwsim_mon;
 873         skb_reset_mac_header(skb);
 874         skb->ip_summed = CHECKSUM_UNNECESSARY;
 875         skb->pkt_type = PACKET_OTHERHOST;
 876         skb->protocol = htons(ETH_P_802_2);
 877         memset(skb->cb, 0, sizeof(skb->cb));
 878         netif_rx(skb);
 879 }
 880
 881
 882 static void mac80211_hwsim_monitor_ack(struct ieee80211_channel *chan,
 883                                        const u8 *addr)
 884 {
 885         struct sk_buff *skb;
 886         struct hwsim_radiotap_ack_hdr *hdr;
 887         u16 flags;
 888         struct ieee80211_hdr *hdr11;
 889
 890         if (!netif_running(hwsim_mon))
 891                 return;
 892
 893         skb = dev_alloc_skb(100);
 894         if (skb == NULL)
 895                 return;
 896
 897         hdr = skb_put(skb, sizeof(*hdr));
 898         hdr->hdr.it_version = PKTHDR_RADIOTAP_VERSION;
 899         hdr->hdr.it_pad = 0;
 900         hdr->hdr.it_len = cpu_to_le16(sizeof(*hdr));
 901         hdr->hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
 902                                           (1 << IEEE80211_RADIOTAP_CHANNEL));
 903         hdr->rt_flags = 0;
 904         hdr->pad = 0;
 905         hdr->rt_channel = cpu_to_le16(chan->center_freq);
 906         flags = IEEE80211_CHAN_2GHZ;
 907         hdr->rt_chbitmask = cpu_to_le16(flags);
 908
 909         hdr11 = skb_put(skb, 10);
 910         hdr11->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
 911                                            IEEE80211_STYPE_ACK);
 912         hdr11->duration_id = cpu_to_le16(0);
 913         memcpy(hdr11->addr1, addr, ETH_ALEN);
 914
 915         skb->dev = hwsim_mon;
 916         skb_reset_mac_header(skb);
 917         skb->ip_summed = CHECKSUM_UNNECESSARY;
 918         skb->pkt_type = PACKET_OTHERHOST;
 919         skb->protocol = htons(ETH_P_802_2);
 920         memset(skb->cb, 0, sizeof(skb->cb));
 921         netif_rx(skb);
 922 }
 923
 924 struct mac80211_hwsim_addr_match_data {
 925         u8 addr[ETH_ALEN];
 926         bool ret;
 927 };
 928
 929 static void mac80211_hwsim_addr_iter(void *data, u8 *mac,
 930                                      struct ieee80211_vif *vif)
 931 {
 932         struct mac80211_hwsim_addr_match_data *md = data;
 933
 934         if (memcmp(mac, md->addr, ETH_ALEN) == 0)
 935                 md->ret = true;
 936 }
 937
 938 static bool mac80211_hwsim_addr_match(struct mac80211_hwsim_data *data,
 939                                       const u8 *addr)
 940 {
 941         struct mac80211_hwsim_addr_match_data md = {
 942                 .ret = false,
 943         };
 944
 945         if (data->scanning && memcmp(addr, data->scan_addr, ETH_ALEN) == 0)
 946                 return true;
 947
 948         memcpy(md.addr, addr, ETH_ALEN);
 949
 950         ieee80211_iterate_active_interfaces_atomic(data->hw,
 951                                                    IEEE80211_IFACE_ITER_NORMAL,
 952                                                    mac80211_hwsim_addr_iter,
 953                                                    &md);
 954
 955         return md.ret;
 956 }
 957
 958 static bool hwsim_ps_rx_ok(struct mac80211_hwsim_data *data,
 959                            struct sk_buff *skb)
 960 {
 961         switch (data->ps) {
 962         case PS_DISABLED:
 963                 return true;
 964         case PS_ENABLED:
 965                 return false;
 966         case PS_AUTO_POLL:
 967                 /* TODO: accept (some) Beacons by default and other frames only
 968                  * if pending PS-Poll has been sent */
 969                 return true;
 970         case PS_MANUAL_POLL:
 971                 /* Allow unicast frames to own address if there is a pending
 972                  * PS-Poll */
 973                 if (data->ps_poll_pending &&
 974                     mac80211_hwsim_addr_match(data, skb->data + 4)) {
 975                         data->ps_poll_pending = false;
 976                         return true;
 977                 }
 978                 return false;
 979         }
 980
 981         return true;
 982 }
 983
 984 static int hwsim_unicast_netgroup(struct mac80211_hwsim_data *data,
 985                                   struct sk_buff *skb, int portid)
 986 {
 987         struct net *net;
 988         bool found = false;
 989         int res = -ENOENT;
 990
 991         rcu_read_lock();
 992         for_each_net_rcu(net) {
 993                 if (data->netgroup == hwsim_net_get_netgroup(net)) {
 994                         res = genlmsg_unicast(net, skb, portid);
 995                         found = true;
 996                         break;
 997                 }
 998         }
 999         rcu_read_unlock();
1000
1001         if (!found)
1002                 nlmsg_free(skb);
1003
1004         return res;
1005 }
1006
1007 static void mac80211_hwsim_tx_frame_nl(struct ieee80211_hw *hw,
1008                                        struct sk_buff *my_skb,
1009                                        int dst_portid)
1010 {
1011         struct sk_buff *skb;
1012         struct mac80211_hwsim_data *data = hw->priv;
1013         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) my_skb->data;
1014         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(my_skb);
1015         void *msg_head;
1016         unsigned int hwsim_flags = 0;
1017         int i;
1018         struct hwsim_tx_rate tx_attempts[IEEE80211_TX_MAX_RATES];
1019         uintptr_t cookie;
1020
1021         if (data->ps != PS_DISABLED)
1022                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1023         /* If the queue contains MAX_QUEUE skb's drop some */
1024         if (skb_queue_len(&data->pending) >= MAX_QUEUE) {
1025                 /* Droping until WARN_QUEUE level */
1026                 while (skb_queue_len(&data->pending) >= WARN_QUEUE) {
1027                         ieee80211_free_txskb(hw, skb_dequeue(&data->pending));
1028                         data->tx_dropped++;
1029                 }
1030         }
1031
1032         skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1033         if (skb == NULL)
1034                 goto nla_put_failure;
1035
1036         msg_head = genlmsg_put(skb, 0, 0, &hwsim_genl_family, 0,
1037                                HWSIM_CMD_FRAME);
1038         if (msg_head == NULL) {
1039                 pr_debug("mac80211_hwsim: problem with msg_head\n");
1040                 goto nla_put_failure;
1041         }
1042
1043         if (nla_put(skb, HWSIM_ATTR_ADDR_TRANSMITTER,
1044                     ETH_ALEN, data->addresses[1].addr))
1045                 goto nla_put_failure;
1046
1047         /* We get the skb->data */
1048         if (nla_put(skb, HWSIM_ATTR_FRAME, my_skb->len, my_skb->data))
1049                 goto nla_put_failure;
1050
1051         /* We get the flags for this transmission, and we translate them to
1052            wmediumd flags  */
1053
1054         if (info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS)
1055                 hwsim_flags |= HWSIM_TX_CTL_REQ_TX_STATUS;
1056
1057         if (info->flags & IEEE80211_TX_CTL_NO_ACK)
1058                 hwsim_flags |= HWSIM_TX_CTL_NO_ACK;
1059
1060         if (nla_put_u32(skb, HWSIM_ATTR_FLAGS, hwsim_flags))
1061                 goto nla_put_failure;
1062
1063         if (nla_put_u32(skb, HWSIM_ATTR_FREQ, data->channel->center_freq))
1064                 goto nla_put_failure;
1065
1066         /* We get the tx control (rate and retries) info*/
1067
1068         for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
1069                 tx_attempts[i].idx = info->status.rates[i].idx;
1070                 tx_attempts[i].count = info->status.rates[i].count;
1071         }
1072
1073         if (nla_put(skb, HWSIM_ATTR_TX_INFO,
1074                     sizeof(struct hwsim_tx_rate)*IEEE80211_TX_MAX_RATES,
1075                     tx_attempts))
1076                 goto nla_put_failure;
1077
1078         /* We create a cookie to identify this skb */
1079         data->pending_cookie++;
1080         cookie = data->pending_cookie;
1081         info->rate_driver_data[0] = (void *)cookie;
1082         if (nla_put_u64_64bit(skb, HWSIM_ATTR_COOKIE, cookie, HWSIM_ATTR_PAD))
1083                 goto nla_put_failure;
1084
1085         genlmsg_end(skb, msg_head);
1086         if (hwsim_unicast_netgroup(data, skb, dst_portid))
1087                 goto err_free_txskb;
1088
1089         /* Enqueue the packet */
1090         skb_queue_tail(&data->pending, my_skb);
1091         data->tx_pkts++;
1092         data->tx_bytes += my_skb->len;
1093         return;
1094
1095 nla_put_failure:
1096         nlmsg_free(skb);
1097 err_free_txskb:
1098         pr_debug("mac80211_hwsim: error occurred in %s\n", __func__);
1099         ieee80211_free_txskb(hw, my_skb);
1100         data->tx_failed++;
1101 }
1102
1103 static bool hwsim_chans_compat(struct ieee80211_channel *c1,
1104                                struct ieee80211_channel *c2)
1105 {
1106         if (!c1 || !c2)
1107                 return false;
1108
1109         return c1->center_freq == c2->center_freq;
1110 }
1111
1112 struct tx_iter_data {
1113         struct ieee80211_channel *channel;
1114         bool receive;
1115 };
1116
1117 static void mac80211_hwsim_tx_iter(void *_data, u8 *addr,
1118                                    struct ieee80211_vif *vif)
1119 {
1120         struct tx_iter_data *data = _data;
1121
1122         if (!vif->chanctx_conf)
1123                 return;
1124
1125         if (!hwsim_chans_compat(data->channel,
1126                                 rcu_dereference(vif->chanctx_conf)->def.chan))
1127                 return;
1128
1129         data->receive = true;
1130 }
1131
1132 static void mac80211_hwsim_add_vendor_rtap(struct sk_buff *skb)
1133 {
1134         /*
1135          * To enable this code, #define the HWSIM_RADIOTAP_OUI,
1136          * e.g. like this:
1137          * #define HWSIM_RADIOTAP_OUI "\x02\x00\x00"
1138          * (but you should use a valid OUI, not that)
1139          *
1140          * If anyone wants to 'donate' a radiotap OUI/subns code
1141          * please send a patch removing this #ifdef and changing
1142          * the values accordingly.
1143          */
1144 #ifdef HWSIM_RADIOTAP_OUI
1145         struct ieee80211_vendor_radiotap *rtap;
1146
1147         /*
1148          * Note that this code requires the headroom in the SKB
1149          * that was allocated earlier.
1150          */
1151         rtap = skb_push(skb, sizeof(*rtap) + 8 + 4);
1152         rtap->oui[0] = HWSIM_RADIOTAP_OUI[0];
1153         rtap->oui[1] = HWSIM_RADIOTAP_OUI[1];
1154         rtap->oui[2] = HWSIM_RADIOTAP_OUI[2];
1155         rtap->subns = 127;
1156
1157         /*
1158          * Radiotap vendor namespaces can (and should) also be
1159          * split into fields by using the standard radiotap
1160          * presence bitmap mechanism. Use just BIT(0) here for
1161          * the presence bitmap.
1162          */
1163         rtap->present = BIT(0);
1164         /* We have 8 bytes of (dummy) data */
1165         rtap->len = 8;
1166         /* For testing, also require it to be aligned */
1167         rtap->align = 8;
1168         /* And also test that padding works, 4 bytes */
1169         rtap->pad = 4;
1170         /* push the data */
1171         memcpy(rtap->data, "ABCDEFGH", 8);
1172         /* make sure to clear padding, mac80211 doesn't */
1173         memset(rtap->data + 8, 0, 4);
1174
1175         IEEE80211_SKB_RXCB(skb)->flag |= RX_FLAG_RADIOTAP_VENDOR_DATA;
1176 #endif
1177 }
1178
1179 static bool mac80211_hwsim_tx_frame_no_nl(struct ieee80211_hw *hw,
1180                                           struct sk_buff *skb,
1181                                           struct ieee80211_channel *chan)
1182 {
1183         struct mac80211_hwsim_data *data = hw->priv, *data2;
1184         bool ack = false;
1185         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1186         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1187         struct ieee80211_rx_status rx_status;
1188         u64 now;
1189
1190         memset(&rx_status, 0, sizeof(rx_status));
1191         rx_status.flag |= RX_FLAG_MACTIME_START;
1192         rx_status.freq = chan->center_freq;
1193         rx_status.band = chan->band;
1194         if (info->control.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) {
1195                 rx_status.rate_idx =
1196                         ieee80211_rate_get_vht_mcs(&info->control.rates[0]);
1197                 rx_status.nss =
1198                         ieee80211_rate_get_vht_nss(&info->control.rates[0]);
1199                 rx_status.encoding = RX_ENC_VHT;
1200         } else {
1201                 rx_status.rate_idx = info->control.rates[0].idx;
1202                 if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS)
1203                         rx_status.encoding = RX_ENC_HT;
1204         }
1205         if (info->control.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
1206                 rx_status.bw = RATE_INFO_BW_40;
1207         else if (info->control.rates[0].flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
1208                 rx_status.bw = RATE_INFO_BW_80;
1209         else if (info->control.rates[0].flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
1210                 rx_status.bw = RATE_INFO_BW_160;
1211         else
1212                 rx_status.bw = RATE_INFO_BW_20;
1213         if (info->control.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
1214                 rx_status.enc_flags |= RX_ENC_FLAG_SHORT_GI;
1215         /* TODO: simulate real signal strength (and optional packet loss) */
1216         rx_status.signal = -50;
1217         if (info->control.vif)
1218                 rx_status.signal += info->control.vif->bss_conf.txpower;
1219
1220         if (data->ps != PS_DISABLED)
1221                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1222
1223         /* release the skb's source info */
1224         skb_orphan(skb);
1225         skb_dst_drop(skb);
1226         skb->mark = 0;
1227         secpath_reset(skb);
1228         nf_reset(skb);
1229
1230         /*
1231          * Get absolute mactime here so all HWs RX at the "same time", and
1232          * absolute TX time for beacon mactime so the timestamp matches.
1233          * Giving beacons a different mactime than non-beacons looks messy, but
1234          * it helps the Toffset be exact and a ~10us mactime discrepancy
1235          * probably doesn't really matter.
1236          */
1237         if (ieee80211_is_beacon(hdr->frame_control) ||
1238             ieee80211_is_probe_resp(hdr->frame_control))
1239                 now = data->abs_bcn_ts;
1240         else
1241                 now = mac80211_hwsim_get_tsf_raw();
1242
1243         /* Copy skb to all enabled radios that are on the current frequency */
1244         spin_lock(&hwsim_radio_lock);
1245         list_for_each_entry(data2, &hwsim_radios, list) {
1246                 struct sk_buff *nskb;
1247                 struct tx_iter_data tx_iter_data = {
1248                         .receive = false,
1249                         .channel = chan,
1250                 };
1251
1252                 if (data == data2)
1253                         continue;
1254
1255                 if (!data2->started || (data2->idle && !data2->tmp_chan) ||
1256                     !hwsim_ps_rx_ok(data2, skb))
1257                         continue;
1258
1259                 if (!(data->group & data2->group))
1260                         continue;
1261
1262                 if (data->netgroup != data2->netgroup)
1263                         continue;
1264
1265                 if (!hwsim_chans_compat(chan, data2->tmp_chan) &&
1266                     !hwsim_chans_compat(chan, data2->channel)) {
1267                         ieee80211_iterate_active_interfaces_atomic(
1268                                 data2->hw, IEEE80211_IFACE_ITER_NORMAL,
1269                                 mac80211_hwsim_tx_iter, &tx_iter_data);
1270                         if (!tx_iter_data.receive)
1271                                 continue;
1272                 }
1273
1274                 /*
1275                  * reserve some space for our vendor and the normal
1276                  * radiotap header, since we're copying anyway
1277                  */
1278                 if (skb->len < PAGE_SIZE && paged_rx) {
1279                         struct page *page = alloc_page(GFP_ATOMIC);
1280
1281                         if (!page)
1282                                 continue;
1283
1284                         nskb = dev_alloc_skb(128);
1285                         if (!nskb) {
1286                                 __free_page(page);
1287                                 continue;
1288                         }
1289
1290                         memcpy(page_address(page), skb->data, skb->len);
1291                         skb_add_rx_frag(nskb, 0, page, 0, skb->len, skb->len);
1292                 } else {
1293                         nskb = skb_copy(skb, GFP_ATOMIC);
1294                         if (!nskb)
1295                                 continue;
1296                 }
1297
1298                 if (mac80211_hwsim_addr_match(data2, hdr->addr1))
1299                         ack = true;
1300
1301                 rx_status.mactime = now + data2->tsf_offset;
1302
1303                 memcpy(IEEE80211_SKB_RXCB(nskb), &rx_status, sizeof(rx_status));
1304
1305                 mac80211_hwsim_add_vendor_rtap(nskb);
1306
1307                 data2->rx_pkts++;
1308                 data2->rx_bytes += nskb->len;
1309                 ieee80211_rx_irqsafe(data2->hw, nskb);
1310         }
1311         spin_unlock(&hwsim_radio_lock);
1312
1313         return ack;
1314 }
1315
1316 static void mac80211_hwsim_tx(struct ieee80211_hw *hw,
1317                               struct ieee80211_tx_control *control,
1318                               struct sk_buff *skb)
1319 {
1320         struct mac80211_hwsim_data *data = hw->priv;
1321         struct ieee80211_tx_info *txi = IEEE80211_SKB_CB(skb);
1322         struct ieee80211_hdr *hdr = (void *)skb->data;
1323         struct ieee80211_chanctx_conf *chanctx_conf;
1324         struct ieee80211_channel *channel;
1325         bool ack;
1326         u32 _portid;
1327
1328         if (WARN_ON(skb->len < 10)) {
1329                 /* Should not happen; just a sanity check for addr1 use */
1330                 ieee80211_free_txskb(hw, skb);
1331                 return;
1332         }
1333
1334         if (!data->use_chanctx) {
1335                 channel = data->channel;
1336         } else if (txi->hw_queue == 4) {
1337                 channel = data->tmp_chan;
1338         } else {
1339                 chanctx_conf = rcu_dereference(txi->control.vif->chanctx_conf);
1340                 if (chanctx_conf)
1341                         channel = chanctx_conf->def.chan;
1342                 else
1343                         channel = NULL;
1344         }
1345
1346         if (WARN(!channel, "TX w/o channel - queue = %d\n", txi->hw_queue)) {
1347                 ieee80211_free_txskb(hw, skb);
1348                 return;
1349         }
1350
1351         if (data->idle && !data->tmp_chan) {
1352                 wiphy_dbg(hw->wiphy, "Trying to TX when idle - reject\n");
1353                 ieee80211_free_txskb(hw, skb);
1354                 return;
1355         }
1356
1357         if (txi->control.vif)
1358                 hwsim_check_magic(txi->control.vif);
1359         if (control->sta)
1360                 hwsim_check_sta_magic(control->sta);
1361
1362         if (ieee80211_hw_check(hw, SUPPORTS_RC_TABLE))
1363                 ieee80211_get_tx_rates(txi->control.vif, control->sta, skb,
1364                                        txi->control.rates,
1365                                        ARRAY_SIZE(txi->control.rates));
1366
1367         if (skb->len >= 24 + 8 &&
1368             ieee80211_is_probe_resp(hdr->frame_control)) {
1369                 /* fake header transmission time */
1370                 struct ieee80211_mgmt *mgmt;
1371                 struct ieee80211_rate *txrate;
1372                 u64 ts;
1373
1374                 mgmt = (struct ieee80211_mgmt *)skb->data;
1375                 txrate = ieee80211_get_tx_rate(hw, txi);
1376                 ts = mac80211_hwsim_get_tsf_raw();
1377                 mgmt->u.probe_resp.timestamp =
1378                         cpu_to_le64(ts + data->tsf_offset +
1379                                     24 * 8 * 10 / txrate->bitrate);
1380         }
1381
1382         mac80211_hwsim_monitor_rx(hw, skb, channel);
1383
1384         /* wmediumd mode check */
1385         _portid = READ_ONCE(data->wmediumd);
1386
1387         if (_portid)
1388                 return mac80211_hwsim_tx_frame_nl(hw, skb, _portid);
1389
1390         /* NO wmediumd detected, perfect medium simulation */
1391         data->tx_pkts++;
1392         data->tx_bytes += skb->len;
1393         ack = mac80211_hwsim_tx_frame_no_nl(hw, skb, channel);
1394
1395         if (ack && skb->len >= 16)
1396                 mac80211_hwsim_monitor_ack(channel, hdr->addr2);
1397
1398         ieee80211_tx_info_clear_status(txi);
1399
1400         /* frame was transmitted at most favorable rate at first attempt */
1401         txi->control.rates[0].count = 1;
1402         txi->control.rates[1].idx = -1;
1403
1404         if (!(txi->flags & IEEE80211_TX_CTL_NO_ACK) && ack)
1405                 txi->flags |= IEEE80211_TX_STAT_ACK;
1406         ieee80211_tx_status_irqsafe(hw, skb);
1407 }
1408
1409
1410 static int mac80211_hwsim_start(struct ieee80211_hw *hw)
1411 {
1412         struct mac80211_hwsim_data *data = hw->priv;
1413         wiphy_dbg(hw->wiphy, "%s\n", __func__);
1414         data->started = true;
1415         return 0;
1416 }
1417
1418
1419 static void mac80211_hwsim_stop(struct ieee80211_hw *hw)
1420 {
1421         struct mac80211_hwsim_data *data = hw->priv;
1422         data->started = false;
1423         tasklet_hrtimer_cancel(&data->beacon_timer);
1424         wiphy_dbg(hw->wiphy, "%s\n", __func__);
1425 }
1426
1427
1428 static int mac80211_hwsim_add_interface(struct ieee80211_hw *hw,
1429                                         struct ieee80211_vif *vif)
1430 {
1431         wiphy_dbg(hw->wiphy, "%s (type=%d mac_addr=%pM)\n",
1432                   __func__, ieee80211_vif_type_p2p(vif),
1433                   vif->addr);
1434         hwsim_set_magic(vif);
1435
1436         vif->cab_queue = 0;
1437         vif->hw_queue[IEEE80211_AC_VO] = 0;
1438         vif->hw_queue[IEEE80211_AC_VI] = 1;
1439         vif->hw_queue[IEEE80211_AC_BE] = 2;
1440         vif->hw_queue[IEEE80211_AC_BK] = 3;
1441
1442         return 0;
1443 }
1444
1445
1446 static int mac80211_hwsim_change_interface(struct ieee80211_hw *hw,
1447                                            struct ieee80211_vif *vif,
1448                                            enum nl80211_iftype newtype,
1449                                            bool newp2p)
1450 {
1451         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1452         wiphy_dbg(hw->wiphy,
1453                   "%s (old type=%d, new type=%d, mac_addr=%pM)\n",
1454                   __func__, ieee80211_vif_type_p2p(vif),
1455                     newtype, vif->addr);
1456         hwsim_check_magic(vif);
1457
1458         /*
1459          * interface may change from non-AP to AP in
1460          * which case this needs to be set up again
1461          */
1462         vif->cab_queue = 0;
1463
1464         return 0;
1465 }
1466
1467 static void mac80211_hwsim_remove_interface(
1468         struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1469 {
1470         wiphy_dbg(hw->wiphy, "%s (type=%d mac_addr=%pM)\n",
1471                   __func__, ieee80211_vif_type_p2p(vif),
1472                   vif->addr);
1473         hwsim_check_magic(vif);
1474         hwsim_clear_magic(vif);
1475 }
1476
1477 static void mac80211_hwsim_tx_frame(struct ieee80211_hw *hw,
1478                                     struct sk_buff *skb,
1479                                     struct ieee80211_channel *chan)
1480 {
1481         struct mac80211_hwsim_data *data = hw->priv;
1482         u32 _pid = READ_ONCE(data->wmediumd);
1483
1484         if (ieee80211_hw_check(hw, SUPPORTS_RC_TABLE)) {
1485                 struct ieee80211_tx_info *txi = IEEE80211_SKB_CB(skb);
1486                 ieee80211_get_tx_rates(txi->control.vif, NULL, skb,
1487                                        txi->control.rates,
1488                                        ARRAY_SIZE(txi->control.rates));
1489         }
1490
1491         mac80211_hwsim_monitor_rx(hw, skb, chan);
1492
1493         if (_pid)
1494                 return mac80211_hwsim_tx_frame_nl(hw, skb, _pid);
1495
1496         mac80211_hwsim_tx_frame_no_nl(hw, skb, chan);
1497         dev_kfree_skb(skb);
1498 }
1499
1500 static void mac80211_hwsim_beacon_tx(void *arg, u8 *mac,
1501                                      struct ieee80211_vif *vif)
1502 {
1503         struct mac80211_hwsim_data *data = arg;
1504         struct ieee80211_hw *hw = data->hw;
1505         struct ieee80211_tx_info *info;
1506         struct ieee80211_rate *txrate;
1507         struct ieee80211_mgmt *mgmt;
1508         struct sk_buff *skb;
1509
1510         hwsim_check_magic(vif);
1511
1512         if (vif->type != NL80211_IFTYPE_AP &&
1513             vif->type != NL80211_IFTYPE_MESH_POINT &&
1514             vif->type != NL80211_IFTYPE_ADHOC)
1515                 return;
1516
1517         skb = ieee80211_beacon_get(hw, vif);
1518         if (skb == NULL)
1519                 return;
1520         info = IEEE80211_SKB_CB(skb);
1521         if (ieee80211_hw_check(hw, SUPPORTS_RC_TABLE))
1522                 ieee80211_get_tx_rates(vif, NULL, skb,
1523                                        info->control.rates,
1524                                        ARRAY_SIZE(info->control.rates));
1525
1526         txrate = ieee80211_get_tx_rate(hw, info);
1527
1528         mgmt = (struct ieee80211_mgmt *) skb->data;
1529         /* fake header transmission time */
1530         data->abs_bcn_ts = mac80211_hwsim_get_tsf_raw();
1531         mgmt->u.beacon.timestamp = cpu_to_le64(data->abs_bcn_ts +
1532                                                data->tsf_offset +
1533                                                24 * 8 * 10 / txrate->bitrate);
1534
1535         mac80211_hwsim_tx_frame(hw, skb,
1536                                 rcu_dereference(vif->chanctx_conf)->def.chan);
1537
1538         if (vif->csa_active && ieee80211_csa_is_complete(vif))
1539                 ieee80211_csa_finish(vif);
1540 }
1541
1542 static enum hrtimer_restart
1543 mac80211_hwsim_beacon(struct hrtimer *timer)
1544 {
1545         struct mac80211_hwsim_data *data =
1546                 container_of(timer, struct mac80211_hwsim_data,
1547                              beacon_timer.timer);
1548         struct ieee80211_hw *hw = data->hw;
1549         u64 bcn_int = data->beacon_int;
1550         ktime_t next_bcn;
1551
1552         if (!data->started)
1553                 goto out;
1554
1555         ieee80211_iterate_active_interfaces_atomic(
1556                 hw, IEEE80211_IFACE_ITER_NORMAL,
1557                 mac80211_hwsim_beacon_tx, data);
1558
1559         /* beacon at new TBTT + beacon interval */
1560         if (data->bcn_delta) {
1561                 bcn_int -= data->bcn_delta;
1562                 data->bcn_delta = 0;
1563         }
1564
1565         next_bcn = ktime_add(hrtimer_get_expires(timer),
1566                              ns_to_ktime(bcn_int * 1000));
1567         tasklet_hrtimer_start(&data->beacon_timer, next_bcn, HRTIMER_MODE_ABS);
1568 out:
1569         return HRTIMER_NORESTART;
1570 }
1571
1572 static const char * const hwsim_chanwidths[] = {
1573         [NL80211_CHAN_WIDTH_20_NOHT] = "noht",
1574         [NL80211_CHAN_WIDTH_20] = "ht20",
1575         [NL80211_CHAN_WIDTH_40] = "ht40",
1576         [NL80211_CHAN_WIDTH_80] = "vht80",
1577         [NL80211_CHAN_WIDTH_80P80] = "vht80p80",
1578         [NL80211_CHAN_WIDTH_160] = "vht160",
1579 };
1580
1581 static int mac80211_hwsim_config(struct ieee80211_hw *hw, u32 changed)
1582 {
1583         struct mac80211_hwsim_data *data = hw->priv;
1584         struct ieee80211_conf *conf = &hw->conf;
1585         static const char *smps_modes[IEEE80211_SMPS_NUM_MODES] = {
1586                 [IEEE80211_SMPS_AUTOMATIC] = "auto",
1587                 [IEEE80211_SMPS_OFF] = "off",
1588                 [IEEE80211_SMPS_STATIC] = "static",
1589                 [IEEE80211_SMPS_DYNAMIC] = "dynamic",
1590         };
1591         int idx;
1592
1593         if (conf->chandef.chan)
1594                 wiphy_dbg(hw->wiphy,
1595                           "%s (freq=%d(%d - %d)/%s idle=%d ps=%d smps=%s)\n",
1596                           __func__,
1597                           conf->chandef.chan->center_freq,
1598                           conf->chandef.center_freq1,
1599                           conf->chandef.center_freq2,
1600                           hwsim_chanwidths[conf->chandef.width],
1601                           !!(conf->flags & IEEE80211_CONF_IDLE),
1602                           !!(conf->flags & IEEE80211_CONF_PS),
1603                           smps_modes[conf->smps_mode]);
1604         else
1605                 wiphy_dbg(hw->wiphy,
1606                           "%s (freq=0 idle=%d ps=%d smps=%s)\n",
1607                           __func__,
1608                           !!(conf->flags & IEEE80211_CONF_IDLE),
1609                           !!(conf->flags & IEEE80211_CONF_PS),
1610                           smps_modes[conf->smps_mode]);
1611
1612         data->idle = !!(conf->flags & IEEE80211_CONF_IDLE);
1613
1614         WARN_ON(conf->chandef.chan && data->use_chanctx);
1615
1616         mutex_lock(&data->mutex);
1617         if (data->scanning && conf->chandef.chan) {
1618                 for (idx = 0; idx < ARRAY_SIZE(data->survey_data); idx++) {
1619                         if (data->survey_data[idx].channel == data->channel) {
1620                                 data->survey_data[idx].start =
1621                                         data->survey_data[idx].next_start;
1622                                 data->survey_data[idx].end = jiffies;
1623                                 break;
1624                         }
1625                 }
1626
1627                 data->channel = conf->chandef.chan;
1628
1629                 for (idx = 0; idx < ARRAY_SIZE(data->survey_data); idx++) {
1630                         if (data->survey_data[idx].channel &&
1631                             data->survey_data[idx].channel != data->channel)
1632                                 continue;
1633                         data->survey_data[idx].channel = data->channel;
1634                         data->survey_data[idx].next_start = jiffies;
1635                         break;
1636                 }
1637         } else {
1638                 data->channel = conf->chandef.chan;
1639         }
1640         mutex_unlock(&data->mutex);
1641
1642         if (!data->started || !data->beacon_int)
1643                 tasklet_hrtimer_cancel(&data->beacon_timer);
1644         else if (!hrtimer_is_queued(&data->beacon_timer.timer)) {
1645                 u64 tsf = mac80211_hwsim_get_tsf(hw, NULL);
1646                 u32 bcn_int = data->beacon_int;
1647                 u64 until_tbtt = bcn_int - do_div(tsf, bcn_int);
1648
1649                 tasklet_hrtimer_start(&data->beacon_timer,
1650                                       ns_to_ktime(until_tbtt * 1000),
1651                                       HRTIMER_MODE_REL);
1652         }
1653
1654         return 0;
1655 }
1656
1657
1658 static void mac80211_hwsim_configure_filter(struct ieee80211_hw *hw,
1659                                             unsigned int changed_flags,
1660                                             unsigned int *total_flags,u64 multicast)
1661 {
1662         struct mac80211_hwsim_data *data = hw->priv;
1663
1664         wiphy_dbg(hw->wiphy, "%s\n", __func__);
1665
1666         data->rx_filter = 0;
1667         if (*total_flags & FIF_ALLMULTI)
1668                 data->rx_filter |= FIF_ALLMULTI;
1669
1670         *total_flags = data->rx_filter;
1671 }
1672
1673 static void mac80211_hwsim_bcn_en_iter(void *data, u8 *mac,
1674                                        struct ieee80211_vif *vif)
1675 {
1676         unsigned int *count = data;
1677         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
1678
1679         if (vp->bcn_en)
1680                 (*count)++;
1681 }
1682
1683 static void mac80211_hwsim_bss_info_changed(struct ieee80211_hw *hw,
1684                                             struct ieee80211_vif *vif,
1685                                             struct ieee80211_bss_conf *info,
1686                                             u32 changed)
1687 {
1688         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
1689         struct mac80211_hwsim_data *data = hw->priv;
1690
1691         hwsim_check_magic(vif);
1692
1693         wiphy_dbg(hw->wiphy, "%s(changed=0x%x vif->addr=%pM)\n",
1694                   __func__, changed, vif->addr);
1695
1696         if (changed & BSS_CHANGED_BSSID) {
1697                 wiphy_dbg(hw->wiphy, "%s: BSSID changed: %pM\n",
1698                           __func__, info->bssid);
1699                 memcpy(vp->bssid, info->bssid, ETH_ALEN);
1700         }
1701
1702         if (changed & BSS_CHANGED_ASSOC) {
1703                 wiphy_dbg(hw->wiphy, "  ASSOC: assoc=%d aid=%d\n",
1704                           info->assoc, info->aid);
1705                 vp->assoc = info->assoc;
1706                 vp->aid = info->aid;
1707         }
1708
1709         if (changed & BSS_CHANGED_BEACON_ENABLED) {
1710                 wiphy_dbg(hw->wiphy, "  BCN EN: %d (BI=%u)\n",
1711                           info->enable_beacon, info->beacon_int);
1712                 vp->bcn_en = info->enable_beacon;
1713                 if (data->started &&
1714                     !hrtimer_is_queued(&data->beacon_timer.timer) &&
1715                     info->enable_beacon) {
1716                         u64 tsf, until_tbtt;
1717                         u32 bcn_int;
1718                         data->beacon_int = info->beacon_int * 1024;
1719                         tsf = mac80211_hwsim_get_tsf(hw, vif);
1720                         bcn_int = data->beacon_int;
1721                         until_tbtt = bcn_int - do_div(tsf, bcn_int);
1722                         tasklet_hrtimer_start(&data->beacon_timer,
1723                                               ns_to_ktime(until_tbtt * 1000),
1724                                               HRTIMER_MODE_REL);
1725                 } else if (!info->enable_beacon) {
1726                         unsigned int count = 0;
1727                         ieee80211_iterate_active_interfaces_atomic(
1728                                 data->hw, IEEE80211_IFACE_ITER_NORMAL,
1729                                 mac80211_hwsim_bcn_en_iter, &count);
1730                         wiphy_dbg(hw->wiphy, "  beaconing vifs remaining: %u",
1731                                   count);
1732                         if (count == 0) {
1733                                 tasklet_hrtimer_cancel(&data->beacon_timer);
1734                                 data->beacon_int = 0;
1735                         }
1736                 }
1737         }
1738
1739         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1740                 wiphy_dbg(hw->wiphy, "  ERP_CTS_PROT: %d\n",
1741                           info->use_cts_prot);
1742         }
1743
1744         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1745                 wiphy_dbg(hw->wiphy, "  ERP_PREAMBLE: %d\n",
1746                           info->use_short_preamble);
1747         }
1748
1749         if (changed & BSS_CHANGED_ERP_SLOT) {
1750                 wiphy_dbg(hw->wiphy, "  ERP_SLOT: %d\n", info->use_short_slot);
1751         }
1752
1753         if (changed & BSS_CHANGED_HT) {
1754                 wiphy_dbg(hw->wiphy, "  HT: op_mode=0x%x\n",
1755                           info->ht_operation_mode);
1756         }
1757
1758         if (changed & BSS_CHANGED_BASIC_RATES) {
1759                 wiphy_dbg(hw->wiphy, "  BASIC_RATES: 0x%llx\n",
1760                           (unsigned long long) info->basic_rates);
1761         }
1762
1763         if (changed & BSS_CHANGED_TXPOWER)
1764                 wiphy_dbg(hw->wiphy, "  TX Power: %d dBm\n", info->txpower);
1765 }
1766
1767 static int mac80211_hwsim_sta_add(struct ieee80211_hw *hw,
1768                                   struct ieee80211_vif *vif,
1769                                   struct ieee80211_sta *sta)
1770 {
1771         hwsim_check_magic(vif);
1772         hwsim_set_sta_magic(sta);
1773
1774         return 0;
1775 }
1776
1777 static int mac80211_hwsim_sta_remove(struct ieee80211_hw *hw,
1778                                      struct ieee80211_vif *vif,
1779                                      struct ieee80211_sta *sta)
1780 {
1781         hwsim_check_magic(vif);
1782         hwsim_clear_sta_magic(sta);
1783
1784         return 0;
1785 }
1786
1787 static void mac80211_hwsim_sta_notify(struct ieee80211_hw *hw,
1788                                       struct ieee80211_vif *vif,
1789                                       enum sta_notify_cmd cmd,
1790                                       struct ieee80211_sta *sta)
1791 {
1792         hwsim_check_magic(vif);
1793
1794         switch (cmd) {
1795         case STA_NOTIFY_SLEEP:
1796         case STA_NOTIFY_AWAKE:
1797                 /* TODO: make good use of these flags */
1798                 break;
1799         default:
1800                 WARN(1, "Invalid sta notify: %d\n", cmd);
1801                 break;
1802         }
1803 }
1804
1805 static int mac80211_hwsim_set_tim(struct ieee80211_hw *hw,
1806                                   struct ieee80211_sta *sta,
1807                                   bool set)
1808 {
1809         hwsim_check_sta_magic(sta);
1810         return 0;
1811 }
1812
1813 static int mac80211_hwsim_conf_tx(
1814         struct ieee80211_hw *hw,
1815         struct ieee80211_vif *vif, u16 queue,
1816         const struct ieee80211_tx_queue_params *params)
1817 {
1818         wiphy_dbg(hw->wiphy,
1819                   "%s (queue=%d txop=%d cw_min=%d cw_max=%d aifs=%d)\n",
1820                   __func__, queue,
1821                   params->txop, params->cw_min,
1822                   params->cw_max, params->aifs);
1823         return 0;
1824 }
1825
1826 static int mac80211_hwsim_get_survey(struct ieee80211_hw *hw, int idx,
1827                                      struct survey_info *survey)
1828 {
1829         struct mac80211_hwsim_data *hwsim = hw->priv;
1830
1831         if (idx < 0 || idx >= ARRAY_SIZE(hwsim->survey_data))
1832                 return -ENOENT;
1833
1834         mutex_lock(&hwsim->mutex);
1835         survey->channel = hwsim->survey_data[idx].channel;
1836         if (!survey->channel) {
1837                 mutex_unlock(&hwsim->mutex);
1838                 return -ENOENT;
1839         }
1840
1841         /*
1842          * Magically conjured dummy values --- this is only ok for simulated hardware.
1843          *
1844          * A real driver which cannot determine real values noise MUST NOT
1845          * report any, especially not a magically conjured ones :-)
1846          */
1847         survey->filled = SURVEY_INFO_NOISE_DBM |
1848                          SURVEY_INFO_TIME |
1849                          SURVEY_INFO_TIME_BUSY;
1850         survey->noise = -92;
1851         survey->time =
1852                 jiffies_to_msecs(hwsim->survey_data[idx].end -
1853                                  hwsim->survey_data[idx].start);
1854         /* report 12.5% of channel time is used */
1855         survey->time_busy = survey->time/8;
1856         mutex_unlock(&hwsim->mutex);
1857
1858         return 0;
1859 }
1860
1861 #ifdef CONFIG_NL80211_TESTMODE
1862 /*
1863  * This section contains example code for using netlink
1864  * attributes with the testmode command in nl80211.
1865  */
1866
1867 /* These enums need to be kept in sync with userspace */
1868 enum hwsim_testmode_attr {
1869         __HWSIM_TM_ATTR_INVALID = 0,
1870         HWSIM_TM_ATTR_CMD       = 1,
1871         HWSIM_TM_ATTR_PS        = 2,
1872
1873         /* keep last */
1874         __HWSIM_TM_ATTR_AFTER_LAST,
1875         HWSIM_TM_ATTR_MAX       = __HWSIM_TM_ATTR_AFTER_LAST - 1
1876 };
1877
1878 enum hwsim_testmode_cmd {
1879         HWSIM_TM_CMD_SET_PS             = 0,
1880         HWSIM_TM_CMD_GET_PS             = 1,
1881         HWSIM_TM_CMD_STOP_QUEUES        = 2,
1882         HWSIM_TM_CMD_WAKE_QUEUES        = 3,
1883 };
1884
1885 static const struct nla_policy hwsim_testmode_policy[HWSIM_TM_ATTR_MAX + 1] = {
1886         [HWSIM_TM_ATTR_CMD] = { .type = NLA_U32 },
1887         [HWSIM_TM_ATTR_PS] = { .type = NLA_U32 },
1888 };
1889
1890 static int mac80211_hwsim_testmode_cmd(struct ieee80211_hw *hw,
1891                                        struct ieee80211_vif *vif,
1892                                        void *data, int len)
1893 {
1894         struct mac80211_hwsim_data *hwsim = hw->priv;
1895         struct nlattr *tb[HWSIM_TM_ATTR_MAX + 1];
1896         struct sk_buff *skb;
1897         int err, ps;
1898
1899         err = nla_parse(tb, HWSIM_TM_ATTR_MAX, data, len,
1900                         hwsim_testmode_policy, NULL);
1901         if (err)
1902                 return err;
1903
1904         if (!tb[HWSIM_TM_ATTR_CMD])
1905                 return -EINVAL;
1906
1907         switch (nla_get_u32(tb[HWSIM_TM_ATTR_CMD])) {
1908         case HWSIM_TM_CMD_SET_PS:
1909                 if (!tb[HWSIM_TM_ATTR_PS])
1910                         return -EINVAL;
1911                 ps = nla_get_u32(tb[HWSIM_TM_ATTR_PS]);
1912                 return hwsim_fops_ps_write(hwsim, ps);
1913         case HWSIM_TM_CMD_GET_PS:
1914                 skb = cfg80211_testmode_alloc_reply_skb(hw->wiphy,
1915                                                 nla_total_size(sizeof(u32)));
1916                 if (!skb)
1917                         return -ENOMEM;
1918                 if (nla_put_u32(skb, HWSIM_TM_ATTR_PS, hwsim->ps))
1919                         goto nla_put_failure;
1920                 return cfg80211_testmode_reply(skb);
1921         case HWSIM_TM_CMD_STOP_QUEUES:
1922                 ieee80211_stop_queues(hw);
1923                 return 0;
1924         case HWSIM_TM_CMD_WAKE_QUEUES:
1925                 ieee80211_wake_queues(hw);
1926                 return 0;
1927         default:
1928                 return -EOPNOTSUPP;
1929         }
1930
1931  nla_put_failure:
1932         kfree_skb(skb);
1933         return -ENOBUFS;
1934 }
1935 #endif
1936
1937 static int mac80211_hwsim_ampdu_action(struct ieee80211_hw *hw,
1938                                        struct ieee80211_vif *vif,
1939                                        struct ieee80211_ampdu_params *params)
1940 {
1941         struct ieee80211_sta *sta = params->sta;
1942         enum ieee80211_ampdu_mlme_action action = params->action;
1943         u16 tid = params->tid;
1944
1945         switch (action) {
1946         case IEEE80211_AMPDU_TX_START:
1947                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1948                 break;
1949         case IEEE80211_AMPDU_TX_STOP_CONT:
1950         case IEEE80211_AMPDU_TX_STOP_FLUSH:
1951         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
1952                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1953                 break;
1954         case IEEE80211_AMPDU_TX_OPERATIONAL:
1955                 break;
1956         case IEEE80211_AMPDU_RX_START:
1957         case IEEE80211_AMPDU_RX_STOP:
1958                 break;
1959         default:
1960                 return -EOPNOTSUPP;
1961         }
1962
1963         return 0;
1964 }
1965
1966 static void mac80211_hwsim_flush(struct ieee80211_hw *hw,
1967                                  struct ieee80211_vif *vif,
1968                                  u32 queues, bool drop)
1969 {
1970         /* Not implemented, queues only on kernel side */
1971 }
1972
1973 static void hw_scan_work(struct work_struct *work)
1974 {
1975         struct mac80211_hwsim_data *hwsim =
1976                 container_of(work, struct mac80211_hwsim_data, hw_scan.work);
1977         struct cfg80211_scan_request *req = hwsim->hw_scan_request;
1978         int dwell, i;
1979
1980         mutex_lock(&hwsim->mutex);
1981         if (hwsim->scan_chan_idx >= req->n_channels) {
1982                 struct cfg80211_scan_info info = {
1983                         .aborted = false,
1984                 };
1985
1986                 wiphy_dbg(hwsim->hw->wiphy, "hw scan complete\n");
1987                 ieee80211_scan_completed(hwsim->hw, &info);
1988                 hwsim->hw_scan_request = NULL;
1989                 hwsim->hw_scan_vif = NULL;
1990                 hwsim->tmp_chan = NULL;
1991                 mutex_unlock(&hwsim->mutex);
1992                 return;
1993         }
1994
1995         wiphy_dbg(hwsim->hw->wiphy, "hw scan %d MHz\n",
1996                   req->channels[hwsim->scan_chan_idx]->center_freq);
1997
1998         hwsim->tmp_chan = req->channels[hwsim->scan_chan_idx];
1999         if (hwsim->tmp_chan->flags & (IEEE80211_CHAN_NO_IR |
2000                                       IEEE80211_CHAN_RADAR) ||
2001             !req->n_ssids) {
2002                 dwell = 120;
2003         } else {
2004                 dwell = 30;
2005                 /* send probes */
2006                 for (i = 0; i < req->n_ssids; i++) {
2007                         struct sk_buff *probe;
2008                         struct ieee80211_mgmt *mgmt;
2009
2010                         probe = ieee80211_probereq_get(hwsim->hw,
2011                                                        hwsim->scan_addr,
2012                                                        req->ssids[i].ssid,
2013                                                        req->ssids[i].ssid_len,
2014                                                        req->ie_len);
2015                         if (!probe)
2016                                 continue;
2017
2018                         mgmt = (struct ieee80211_mgmt *) probe->data;
2019                         memcpy(mgmt->da, req->bssid, ETH_ALEN);
2020                         memcpy(mgmt->bssid, req->bssid, ETH_ALEN);
2021
2022                         if (req->ie_len)
2023                                 skb_put_data(probe, req->ie, req->ie_len);
2024
2025                         local_bh_disable();
2026                         mac80211_hwsim_tx_frame(hwsim->hw, probe,
2027                                                 hwsim->tmp_chan);
2028                         local_bh_enable();
2029                 }
2030         }
2031         ieee80211_queue_delayed_work(hwsim->hw, &hwsim->hw_scan,
2032                                      msecs_to_jiffies(dwell));
2033         hwsim->survey_data[hwsim->scan_chan_idx].channel = hwsim->tmp_chan;
2034         hwsim->survey_data[hwsim->scan_chan_idx].start = jiffies;
2035         hwsim->survey_data[hwsim->scan_chan_idx].end =
2036                 jiffies + msecs_to_jiffies(dwell);
2037         hwsim->scan_chan_idx++;
2038         mutex_unlock(&hwsim->mutex);
2039 }
2040
2041 static int mac80211_hwsim_hw_scan(struct ieee80211_hw *hw,
2042                                   struct ieee80211_vif *vif,
2043                                   struct ieee80211_scan_request *hw_req)
2044 {
2045         struct mac80211_hwsim_data *hwsim = hw->priv;
2046         struct cfg80211_scan_request *req = &hw_req->req;
2047
2048         mutex_lock(&hwsim->mutex);
2049         if (WARN_ON(hwsim->tmp_chan || hwsim->hw_scan_request)) {
2050                 mutex_unlock(&hwsim->mutex);
2051                 return -EBUSY;
2052         }
2053         hwsim->hw_scan_request = req;
2054         hwsim->hw_scan_vif = vif;
2055         hwsim->scan_chan_idx = 0;
2056         if (req->flags & NL80211_SCAN_FLAG_RANDOM_ADDR)
2057                 get_random_mask_addr(hwsim->scan_addr,
2058                                      hw_req->req.mac_addr,
2059                                      hw_req->req.mac_addr_mask);
2060         else
2061                 memcpy(hwsim->scan_addr, vif->addr, ETH_ALEN);
2062         memset(hwsim->survey_data, 0, sizeof(hwsim->survey_data));
2063         mutex_unlock(&hwsim->mutex);
2064
2065         wiphy_dbg(hw->wiphy, "hwsim hw_scan request\n");
2066
2067         ieee80211_queue_delayed_work(hwsim->hw, &hwsim->hw_scan, 0);
2068
2069         return 0;
2070 }
2071
2072 static void mac80211_hwsim_cancel_hw_scan(struct ieee80211_hw *hw,
2073                                           struct ieee80211_vif *vif)
2074 {
2075         struct mac80211_hwsim_data *hwsim = hw->priv;
2076         struct cfg80211_scan_info info = {
2077                 .aborted = true,
2078         };
2079
2080         wiphy_dbg(hw->wiphy, "hwsim cancel_hw_scan\n");
2081
2082         cancel_delayed_work_sync(&hwsim->hw_scan);
2083
2084         mutex_lock(&hwsim->mutex);
2085         ieee80211_scan_completed(hwsim->hw, &info);
2086         hwsim->tmp_chan = NULL;
2087         hwsim->hw_scan_request = NULL;
2088         hwsim->hw_scan_vif = NULL;
2089         mutex_unlock(&hwsim->mutex);
2090 }
2091
2092 static void mac80211_hwsim_sw_scan(struct ieee80211_hw *hw,
2093                                    struct ieee80211_vif *vif,
2094                                    const u8 *mac_addr)
2095 {
2096         struct mac80211_hwsim_data *hwsim = hw->priv;
2097
2098         mutex_lock(&hwsim->mutex);
2099
2100         if (hwsim->scanning) {
2101                 pr_debug("two hwsim sw_scans detected!\n");
2102                 goto out;
2103         }
2104
2105         pr_debug("hwsim sw_scan request, prepping stuff\n");
2106
2107         memcpy(hwsim->scan_addr, mac_addr, ETH_ALEN);
2108         hwsim->scanning = true;
2109         memset(hwsim->survey_data, 0, sizeof(hwsim->survey_data));
2110
2111 out:
2112         mutex_unlock(&hwsim->mutex);
2113 }
2114
2115 static void mac80211_hwsim_sw_scan_complete(struct ieee80211_hw *hw,
2116                                             struct ieee80211_vif *vif)
2117 {
2118         struct mac80211_hwsim_data *hwsim = hw->priv;
2119
2120         mutex_lock(&hwsim->mutex);
2121
2122         pr_debug("hwsim sw_scan_complete\n");
2123         hwsim->scanning = false;
2124         eth_zero_addr(hwsim->scan_addr);
2125
2126         mutex_unlock(&hwsim->mutex);
2127 }
2128
2129 static void hw_roc_start(struct work_struct *work)
2130 {
2131         struct mac80211_hwsim_data *hwsim =
2132                 container_of(work, struct mac80211_hwsim_data, roc_start.work);
2133
2134         mutex_lock(&hwsim->mutex);
2135
2136         wiphy_dbg(hwsim->hw->wiphy, "hwsim ROC begins\n");
2137         hwsim->tmp_chan = hwsim->roc_chan;
2138         ieee80211_ready_on_channel(hwsim->hw);
2139
2140         ieee80211_queue_delayed_work(hwsim->hw, &hwsim->roc_done,
2141                                      msecs_to_jiffies(hwsim->roc_duration));
2142
2143         mutex_unlock(&hwsim->mutex);
2144 }
2145
2146 static void hw_roc_done(struct work_struct *work)
2147 {
2148         struct mac80211_hwsim_data *hwsim =
2149                 container_of(work, struct mac80211_hwsim_data, roc_done.work);
2150
2151         mutex_lock(&hwsim->mutex);
2152         ieee80211_remain_on_channel_expired(hwsim->hw);
2153         hwsim->tmp_chan = NULL;
2154         mutex_unlock(&hwsim->mutex);
2155
2156         wiphy_dbg(hwsim->hw->wiphy, "hwsim ROC expired\n");
2157 }
2158
2159 static int mac80211_hwsim_roc(struct ieee80211_hw *hw,
2160                               struct ieee80211_vif *vif,
2161                               struct ieee80211_channel *chan,
2162                               int duration,
2163                               enum ieee80211_roc_type type)
2164 {
2165         struct mac80211_hwsim_data *hwsim = hw->priv;
2166
2167         mutex_lock(&hwsim->mutex);
2168         if (WARN_ON(hwsim->tmp_chan || hwsim->hw_scan_request)) {
2169                 mutex_unlock(&hwsim->mutex);
2170                 return -EBUSY;
2171         }
2172
2173         hwsim->roc_chan = chan;
2174         hwsim->roc_duration = duration;
2175         mutex_unlock(&hwsim->mutex);
2176
2177         wiphy_dbg(hw->wiphy, "hwsim ROC (%d MHz, %d ms)\n",
2178                   chan->center_freq, duration);
2179         ieee80211_queue_delayed_work(hw, &hwsim->roc_start, HZ/50);
2180
2181         return 0;
2182 }
2183
2184 static int mac80211_hwsim_croc(struct ieee80211_hw *hw)
2185 {
2186         struct mac80211_hwsim_data *hwsim = hw->priv;
2187
2188         cancel_delayed_work_sync(&hwsim->roc_start);
2189         cancel_delayed_work_sync(&hwsim->roc_done);
2190
2191         mutex_lock(&hwsim->mutex);
2192         hwsim->tmp_chan = NULL;
2193         mutex_unlock(&hwsim->mutex);
2194
2195         wiphy_dbg(hw->wiphy, "hwsim ROC canceled\n");
2196
2197         return 0;
2198 }
2199
2200 static int mac80211_hwsim_add_chanctx(struct ieee80211_hw *hw,
2201                                       struct ieee80211_chanctx_conf *ctx)
2202 {
2203         hwsim_set_chanctx_magic(ctx);
2204         wiphy_dbg(hw->wiphy,
2205                   "add channel context control: %d MHz/width: %d/cfreqs:%d/%d MHz\n",
2206                   ctx->def.chan->center_freq, ctx->def.width,
2207                   ctx->def.center_freq1, ctx->def.center_freq2);
2208         return 0;
2209 }
2210
2211 static void mac80211_hwsim_remove_chanctx(struct ieee80211_hw *hw,
2212                                           struct ieee80211_chanctx_conf *ctx)
2213 {
2214         wiphy_dbg(hw->wiphy,
2215                   "remove channel context control: %d MHz/width: %d/cfreqs:%d/%d MHz\n",
2216                   ctx->def.chan->center_freq, ctx->def.width,
2217                   ctx->def.center_freq1, ctx->def.center_freq2);
2218         hwsim_check_chanctx_magic(ctx);
2219         hwsim_clear_chanctx_magic(ctx);
2220 }
2221
2222 static void mac80211_hwsim_change_chanctx(struct ieee80211_hw *hw,
2223                                           struct ieee80211_chanctx_conf *ctx,
2224                                           u32 changed)
2225 {
2226         hwsim_check_chanctx_magic(ctx);
2227         wiphy_dbg(hw->wiphy,
2228                   "change channel context control: %d MHz/width: %d/cfreqs:%d/%d MHz\n",
2229                   ctx->def.chan->center_freq, ctx->def.width,
2230                   ctx->def.center_freq1, ctx->def.center_freq2);
2231 }
2232
2233 static int mac80211_hwsim_assign_vif_chanctx(struct ieee80211_hw *hw,
2234                                              struct ieee80211_vif *vif,
2235                                              struct ieee80211_chanctx_conf *ctx)
2236 {
2237         hwsim_check_magic(vif);
2238         hwsim_check_chanctx_magic(ctx);
2239
2240         return 0;
2241 }
2242
2243 static void mac80211_hwsim_unassign_vif_chanctx(struct ieee80211_hw *hw,
2244                                                 struct ieee80211_vif *vif,
2245                                                 struct ieee80211_chanctx_conf *ctx)
2246 {
2247         hwsim_check_magic(vif);
2248         hwsim_check_chanctx_magic(ctx);
2249 }
2250
2251 static const char mac80211_hwsim_gstrings_stats[][ETH_GSTRING_LEN] = {
2252         "tx_pkts_nic",
2253         "tx_bytes_nic",
2254         "rx_pkts_nic",
2255         "rx_bytes_nic",
2256         "d_tx_dropped",
2257         "d_tx_failed",
2258         "d_ps_mode",
2259         "d_group",
2260 };
2261
2262 #define MAC80211_HWSIM_SSTATS_LEN ARRAY_SIZE(mac80211_hwsim_gstrings_stats)
2263
2264 static void mac80211_hwsim_get_et_strings(struct ieee80211_hw *hw,
2265                                           struct ieee80211_vif *vif,
2266                                           u32 sset, u8 *data)
2267 {
2268         if (sset == ETH_SS_STATS)
2269                 memcpy(data, *mac80211_hwsim_gstrings_stats,
2270                        sizeof(mac80211_hwsim_gstrings_stats));
2271 }
2272
2273 static int mac80211_hwsim_get_et_sset_count(struct ieee80211_hw *hw,
2274                                             struct ieee80211_vif *vif, int sset)
2275 {
2276         if (sset == ETH_SS_STATS)
2277                 return MAC80211_HWSIM_SSTATS_LEN;
2278         return 0;
2279 }
2280
2281 static void mac80211_hwsim_get_et_stats(struct ieee80211_hw *hw,
2282                                         struct ieee80211_vif *vif,
2283                                         struct ethtool_stats *stats, u64 *data)
2284 {
2285         struct mac80211_hwsim_data *ar = hw->priv;
2286         int i = 0;
2287
2288         data[i++] = ar->tx_pkts;
2289         data[i++] = ar->tx_bytes;
2290         data[i++] = ar->rx_pkts;
2291         data[i++] = ar->rx_bytes;
2292         data[i++] = ar->tx_dropped;
2293         data[i++] = ar->tx_failed;
2294         data[i++] = ar->ps;
2295         data[i++] = ar->group;
2296
2297         WARN_ON(i != MAC80211_HWSIM_SSTATS_LEN);
2298 }
2299
2300 #define HWSIM_COMMON_OPS                                        \
2301         .tx = mac80211_hwsim_tx,                                \
2302         .start = mac80211_hwsim_start,                          \
2303         .stop = mac80211_hwsim_stop,                            \
2304         .add_interface = mac80211_hwsim_add_interface,          \
2305         .change_interface = mac80211_hwsim_change_interface,    \
2306         .remove_interface = mac80211_hwsim_remove_interface,    \
2307         .config = mac80211_hwsim_config,                        \
2308         .configure_filter = mac80211_hwsim_configure_filter,    \
2309         .bss_info_changed = mac80211_hwsim_bss_info_changed,    \
2310         .sta_add = mac80211_hwsim_sta_add,                      \
2311         .sta_remove = mac80211_hwsim_sta_remove,                \
2312         .sta_notify = mac80211_hwsim_sta_notify,                \
2313         .set_tim = mac80211_hwsim_set_tim,                      \
2314         .conf_tx = mac80211_hwsim_conf_tx,                      \
2315         .get_survey = mac80211_hwsim_get_survey,                \
2316         CFG80211_TESTMODE_CMD(mac80211_hwsim_testmode_cmd)      \
2317         .ampdu_action = mac80211_hwsim_ampdu_action,            \
2318         .flush = mac80211_hwsim_flush,                          \
2319         .get_tsf = mac80211_hwsim_get_tsf,                      \
2320         .set_tsf = mac80211_hwsim_set_tsf,                      \
2321         .get_et_sset_count = mac80211_hwsim_get_et_sset_count,  \
2322         .get_et_stats = mac80211_hwsim_get_et_stats,            \
2323         .get_et_strings = mac80211_hwsim_get_et_strings,
2324
2325 static const struct ieee80211_ops mac80211_hwsim_ops = {
2326         HWSIM_COMMON_OPS
2327         .sw_scan_start = mac80211_hwsim_sw_scan,
2328         .sw_scan_complete = mac80211_hwsim_sw_scan_complete,
2329 };
2330
2331 static const struct ieee80211_ops mac80211_hwsim_mchan_ops = {
2332         HWSIM_COMMON_OPS
2333         .hw_scan = mac80211_hwsim_hw_scan,
2334         .cancel_hw_scan = mac80211_hwsim_cancel_hw_scan,
2335         .sw_scan_start = NULL,
2336         .sw_scan_complete = NULL,
2337         .remain_on_channel = mac80211_hwsim_roc,
2338         .cancel_remain_on_channel = mac80211_hwsim_croc,
2339         .add_chanctx = mac80211_hwsim_add_chanctx,
2340         .remove_chanctx = mac80211_hwsim_remove_chanctx,
2341         .change_chanctx = mac80211_hwsim_change_chanctx,
2342         .assign_vif_chanctx = mac80211_hwsim_assign_vif_chanctx,
2343         .unassign_vif_chanctx = mac80211_hwsim_unassign_vif_chanctx,
2344 };
2345
2346 struct hwsim_new_radio_params {
2347         unsigned int channels;
2348         const char *reg_alpha2;
2349         const struct ieee80211_regdomain *regd;
2350         bool reg_strict;
2351         bool p2p_device;
2352         bool use_chanctx;
2353         bool destroy_on_close;
2354         const char *hwname;
2355         bool no_vif;
2356 };
2357
2358 static void hwsim_mcast_config_msg(struct sk_buff *mcast_skb,
2359                                    struct genl_info *info)
2360 {
2361         if (info)
2362                 genl_notify(&hwsim_genl_family, mcast_skb, info,
2363                             HWSIM_MCGRP_CONFIG, GFP_KERNEL);
2364         else
2365                 genlmsg_multicast(&hwsim_genl_family, mcast_skb, 0,
2366                                   HWSIM_MCGRP_CONFIG, GFP_KERNEL);
2367 }
2368
2369 static int append_radio_msg(struct sk_buff *skb, int id,
2370                             struct hwsim_new_radio_params *param)
2371 {
2372         int ret;
2373
2374         ret = nla_put_u32(skb, HWSIM_ATTR_RADIO_ID, id);
2375         if (ret < 0)
2376                 return ret;
2377
2378         if (param->channels) {
2379                 ret = nla_put_u32(skb, HWSIM_ATTR_CHANNELS, param->channels);
2380                 if (ret < 0)
2381                         return ret;
2382         }
2383
2384         if (param->reg_alpha2) {
2385                 ret = nla_put(skb, HWSIM_ATTR_REG_HINT_ALPHA2, 2,
2386                               param->reg_alpha2);
2387                 if (ret < 0)
2388                         return ret;
2389         }
2390
2391         if (param->regd) {
2392                 int i;
2393
2394                 for (i = 0; i < ARRAY_SIZE(hwsim_world_regdom_custom); i++) {
2395                         if (hwsim_world_regdom_custom[i] != param->regd)
2396                                 continue;
2397
2398                         ret = nla_put_u32(skb, HWSIM_ATTR_REG_CUSTOM_REG, i);
2399                         if (ret < 0)
2400                                 return ret;
2401                         break;
2402                 }
2403         }
2404
2405         if (param->reg_strict) {
2406                 ret = nla_put_flag(skb, HWSIM_ATTR_REG_STRICT_REG);
2407                 if (ret < 0)
2408                         return ret;
2409         }
2410
2411         if (param->p2p_device) {
2412                 ret = nla_put_flag(skb, HWSIM_ATTR_SUPPORT_P2P_DEVICE);
2413                 if (ret < 0)
2414                         return ret;
2415         }
2416
2417         if (param->use_chanctx) {
2418                 ret = nla_put_flag(skb, HWSIM_ATTR_USE_CHANCTX);
2419                 if (ret < 0)
2420                         return ret;
2421         }
2422
2423         if (param->hwname) {
2424                 ret = nla_put(skb, HWSIM_ATTR_RADIO_NAME,
2425                               strlen(param->hwname), param->hwname);
2426                 if (ret < 0)
2427                         return ret;
2428         }
2429
2430         return 0;
2431 }
2432
2433 static void hwsim_mcast_new_radio(int id, struct genl_info *info,
2434                                   struct hwsim_new_radio_params *param)
2435 {
2436         struct sk_buff *mcast_skb;
2437         void *data;
2438
2439         mcast_skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2440         if (!mcast_skb)
2441                 return;
2442
2443         data = genlmsg_put(mcast_skb, 0, 0, &hwsim_genl_family, 0,
2444                            HWSIM_CMD_NEW_RADIO);
2445         if (!data)
2446                 goto out_err;
2447
2448         if (append_radio_msg(mcast_skb, id, param) < 0)
2449                 goto out_err;
2450
2451         genlmsg_end(mcast_skb, data);
2452
2453         hwsim_mcast_config_msg(mcast_skb, info);
2454         return;
2455
2456 out_err:
2457         genlmsg_cancel(mcast_skb, data);
2458         nlmsg_free(mcast_skb);
2459 }
2460
2461 static int mac80211_hwsim_new_radio(struct genl_info *info,
2462                                     struct hwsim_new_radio_params *param)
2463 {
2464         int err;
2465         u8 addr[ETH_ALEN];
2466         struct mac80211_hwsim_data *data;
2467         struct ieee80211_hw *hw;
2468         enum nl80211_band band;
2469         const struct ieee80211_ops *ops = &mac80211_hwsim_ops;
2470         struct net *net;
2471         int idx;
2472
2473         if (WARN_ON(param->channels > 1 && !param->use_chanctx))
2474                 return -EINVAL;
2475
2476         spin_lock_bh(&hwsim_radio_lock);
2477         idx = hwsim_radio_idx++;
2478         spin_unlock_bh(&hwsim_radio_lock);
2479
2480         if (param->use_chanctx)
2481                 ops = &mac80211_hwsim_mchan_ops;
2482         hw = ieee80211_alloc_hw_nm(sizeof(*data), ops, param->hwname);
2483         if (!hw) {
2484                 pr_debug("mac80211_hwsim: ieee80211_alloc_hw failed\n");
2485                 err = -ENOMEM;
2486                 goto failed;
2487         }
2488
2489         /* ieee80211_alloc_hw_nm may have used a default name */
2490         param->hwname = wiphy_name(hw->wiphy);
2491
2492         if (info)
2493                 net = genl_info_net(info);
2494         else
2495                 net = &init_net;
2496         wiphy_net_set(hw->wiphy, net);
2497
2498         data = hw->priv;
2499         data->hw = hw;
2500
2501         data->dev = device_create(hwsim_class, NULL, 0, hw, "hwsim%d", idx);
2502         if (IS_ERR(data->dev)) {
2503                 printk(KERN_DEBUG
2504                        "mac80211_hwsim: device_create failed (%ld)\n",
2505                        PTR_ERR(data->dev));
2506                 err = -ENOMEM;
2507                 goto failed_drvdata;
2508         }
2509         data->dev->driver = &mac80211_hwsim_driver.driver;
2510         err = device_bind_driver(data->dev);
2511         if (err != 0) {
2512                 pr_debug("mac80211_hwsim: device_bind_driver failed (%d)\n",
2513                        err);
2514                 goto failed_bind;
2515         }
2516
2517         skb_queue_head_init(&data->pending);
2518
2519         SET_IEEE80211_DEV(hw, data->dev);
2520         eth_zero_addr(addr);
2521         addr[0] = 0x02;
2522         addr[3] = idx >> 8;
2523         addr[4] = idx;
2524         memcpy(data->addresses[0].addr, addr, ETH_ALEN);
2525         memcpy(data->addresses[1].addr, addr, ETH_ALEN);
2526         data->addresses[1].addr[0] |= 0x40;
2527         hw->wiphy->n_addresses = 2;
2528         hw->wiphy->addresses = data->addresses;
2529
2530         data->channels = param->channels;
2531         data->use_chanctx = param->use_chanctx;
2532         data->idx = idx;
2533         data->destroy_on_close = param->destroy_on_close;
2534         if (info)
2535                 data->portid = info->snd_portid;
2536
2537         if (data->use_chanctx) {
2538                 hw->wiphy->max_scan_ssids = 255;
2539                 hw->wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
2540                 hw->wiphy->max_remain_on_channel_duration = 1000;
2541                 hw->wiphy->iface_combinations = &data->if_combination;
2542                 if (param->p2p_device)
2543                         data->if_combination = hwsim_if_comb_p2p_dev[0];
2544                 else
2545                         data->if_combination = hwsim_if_comb[0];
2546                 hw->wiphy->n_iface_combinations = 1;
2547                 /* For channels > 1 DFS is not allowed */
2548                 data->if_combination.radar_detect_widths = 0;
2549                 data->if_combination.num_different_channels = data->channels;
2550         } else if (param->p2p_device) {
2551                 hw->wiphy->iface_combinations = hwsim_if_comb_p2p_dev;
2552                 hw->wiphy->n_iface_combinations =
2553                         ARRAY_SIZE(hwsim_if_comb_p2p_dev);
2554         } else {
2555                 hw->wiphy->iface_combinations = hwsim_if_comb;
2556                 hw->wiphy->n_iface_combinations = ARRAY_SIZE(hwsim_if_comb);
2557         }
2558
2559         INIT_DELAYED_WORK(&data->roc_start, hw_roc_start);
2560         INIT_DELAYED_WORK(&data->roc_done, hw_roc_done);
2561         INIT_DELAYED_WORK(&data->hw_scan, hw_scan_work);
2562
2563         hw->queues = 5;
2564         hw->offchannel_tx_hw_queue = 4;
2565         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
2566                                      BIT(NL80211_IFTYPE_AP) |
2567                                      BIT(NL80211_IFTYPE_P2P_CLIENT) |
2568                                      BIT(NL80211_IFTYPE_P2P_GO) |
2569                                      BIT(NL80211_IFTYPE_ADHOC) |
2570                                      BIT(NL80211_IFTYPE_MESH_POINT);
2571
2572         if (param->p2p_device)
2573                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_P2P_DEVICE);
2574
2575         ieee80211_hw_set(hw, SUPPORT_FAST_XMIT);
2576         ieee80211_hw_set(hw, CHANCTX_STA_CSA);
2577         ieee80211_hw_set(hw, SUPPORTS_HT_CCK_RATES);
2578         ieee80211_hw_set(hw, QUEUE_CONTROL);
2579         ieee80211_hw_set(hw, WANT_MONITOR_VIF);
2580         ieee80211_hw_set(hw, AMPDU_AGGREGATION);
2581         ieee80211_hw_set(hw, MFP_CAPABLE);
2582         ieee80211_hw_set(hw, SIGNAL_DBM);
2583         ieee80211_hw_set(hw, TDLS_WIDER_BW);
2584         if (rctbl)
2585                 ieee80211_hw_set(hw, SUPPORTS_RC_TABLE);
2586
2587         hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS |
2588                             WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL |
2589                             WIPHY_FLAG_AP_UAPSD |
2590                             WIPHY_FLAG_HAS_CHANNEL_SWITCH;
2591         hw->wiphy->features |= NL80211_FEATURE_ACTIVE_MONITOR |
2592                                NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE |
2593                                NL80211_FEATURE_STATIC_SMPS |
2594                                NL80211_FEATURE_DYNAMIC_SMPS |
2595                                NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR;
2596         wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_VHT_IBSS);
2597
2598         /* ask mac80211 to reserve space for magic */
2599         hw->vif_data_size = sizeof(struct hwsim_vif_priv);
2600         hw->sta_data_size = sizeof(struct hwsim_sta_priv);
2601         hw->chanctx_data_size = sizeof(struct hwsim_chanctx_priv);
2602
2603         memcpy(data->channels_2ghz, hwsim_channels_2ghz,
2604                 sizeof(hwsim_channels_2ghz));
2605         memcpy(data->channels_5ghz, hwsim_channels_5ghz,
2606                 sizeof(hwsim_channels_5ghz));
2607         memcpy(data->rates, hwsim_rates, sizeof(hwsim_rates));
2608
2609         for (band = NL80211_BAND_2GHZ; band < NUM_NL80211_BANDS; band++) {
2610                 struct ieee80211_supported_band *sband = &data->bands[band];
2611                 switch (band) {
2612                 case NL80211_BAND_2GHZ:
2613                         sband->channels = data->channels_2ghz;
2614                         sband->n_channels = ARRAY_SIZE(hwsim_channels_2ghz);
2615                         sband->bitrates = data->rates;
2616                         sband->n_bitrates = ARRAY_SIZE(hwsim_rates);
2617                         break;
2618                 case NL80211_BAND_5GHZ:
2619                         sband->channels = data->channels_5ghz;
2620                         sband->n_channels = ARRAY_SIZE(hwsim_channels_5ghz);
2621                         sband->bitrates = data->rates + 4;
2622                         sband->n_bitrates = ARRAY_SIZE(hwsim_rates) - 4;
2623
2624                         sband->vht_cap.vht_supported = true;
2625                         sband->vht_cap.cap =
2626                                 IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454 |
2627                                 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ |
2628                                 IEEE80211_VHT_CAP_RXLDPC |
2629                                 IEEE80211_VHT_CAP_SHORT_GI_80 |
2630                                 IEEE80211_VHT_CAP_SHORT_GI_160 |
2631                                 IEEE80211_VHT_CAP_TXSTBC |
2632                                 IEEE80211_VHT_CAP_RXSTBC_1 |
2633                                 IEEE80211_VHT_CAP_RXSTBC_2 |
2634                                 IEEE80211_VHT_CAP_RXSTBC_3 |
2635                                 IEEE80211_VHT_CAP_RXSTBC_4 |
2636                                 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
2637                         sband->vht_cap.vht_mcs.rx_mcs_map =
2638                                 cpu_to_le16(IEEE80211_VHT_MCS_SUPPORT_0_9 << 0 |
2639                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 2 |
2640                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 4 |
2641                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 6 |
2642                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 8 |
2643                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 10 |
2644                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 12 |
2645                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 14);
2646                         sband->vht_cap.vht_mcs.tx_mcs_map =
2647                                 sband->vht_cap.vht_mcs.rx_mcs_map;
2648                         break;
2649                 default:
2650                         continue;
2651                 }
2652
2653                 sband->ht_cap.ht_supported = true;
2654                 sband->ht_cap.cap = IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
2655                                     IEEE80211_HT_CAP_GRN_FLD |
2656                                     IEEE80211_HT_CAP_SGI_20 |
2657                                     IEEE80211_HT_CAP_SGI_40 |
2658                                     IEEE80211_HT_CAP_DSSSCCK40;
2659                 sband->ht_cap.ampdu_factor = 0x3;
2660                 sband->ht_cap.ampdu_density = 0x6;
2661                 memset(&sband->ht_cap.mcs, 0,
2662                        sizeof(sband->ht_cap.mcs));
2663                 sband->ht_cap.mcs.rx_mask[0] = 0xff;
2664                 sband->ht_cap.mcs.rx_mask[1] = 0xff;
2665                 sband->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
2666
2667                 hw->wiphy->bands[band] = sband;
2668         }
2669
2670         /* By default all radios belong to the first group */
2671         data->group = 1;
2672         mutex_init(&data->mutex);
2673
2674         data->netgroup = hwsim_net_get_netgroup(net);
2675
2676         /* Enable frame retransmissions for lossy channels */
2677         hw->max_rates = 4;
2678         hw->max_rate_tries = 11;
2679
2680         hw->wiphy->vendor_commands = mac80211_hwsim_vendor_commands;
2681         hw->wiphy->n_vendor_commands =
2682                 ARRAY_SIZE(mac80211_hwsim_vendor_commands);
2683         hw->wiphy->vendor_events = mac80211_hwsim_vendor_events;
2684         hw->wiphy->n_vendor_events = ARRAY_SIZE(mac80211_hwsim_vendor_events);
2685
2686         if (param->reg_strict)
2687                 hw->wiphy->regulatory_flags |= REGULATORY_STRICT_REG;
2688         if (param->regd) {
2689                 data->regd = param->regd;
2690                 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG;
2691                 wiphy_apply_custom_regulatory(hw->wiphy, param->regd);
2692                 /* give the regulatory workqueue a chance to run */
2693                 schedule_timeout_interruptible(1);
2694         }
2695
2696         if (param->no_vif)
2697                 ieee80211_hw_set(hw, NO_AUTO_VIF);
2698
2699         wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
2700
2701         err = ieee80211_register_hw(hw);
2702         if (err < 0) {
2703                 pr_debug("mac80211_hwsim: ieee80211_register_hw failed (%d)\n",
2704                        err);
2705                 goto failed_hw;
2706         }
2707
2708         wiphy_dbg(hw->wiphy, "hwaddr %pM registered\n", hw->wiphy->perm_addr);
2709
2710         if (param->reg_alpha2) {
2711                 data->alpha2[0] = param->reg_alpha2[0];
2712                 data->alpha2[1] = param->reg_alpha2[1];
2713                 regulatory_hint(hw->wiphy, param->reg_alpha2);
2714         }
2715
2716         data->debugfs = debugfs_create_dir("hwsim", hw->wiphy->debugfsdir);
2717         debugfs_create_file("ps", 0666, data->debugfs, data, &hwsim_fops_ps);
2718         debugfs_create_file("group", 0666, data->debugfs, data,
2719                             &hwsim_fops_group);
2720         if (!data->use_chanctx)
2721                 debugfs_create_file("dfs_simulate_radar", 0222,
2722                                     data->debugfs,
2723                                     data, &hwsim_simulate_radar);
2724
2725         tasklet_hrtimer_init(&data->beacon_timer,
2726                              mac80211_hwsim_beacon,
2727                              CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2728
2729         spin_lock_bh(&hwsim_radio_lock);
2730         list_add_tail(&data->list, &hwsim_radios);
2731         spin_unlock_bh(&hwsim_radio_lock);
2732
2733         if (idx > 0)
2734                 hwsim_mcast_new_radio(idx, info, param);
2735
2736         return idx;
2737
2738 failed_hw:
2739         device_release_driver(data->dev);
2740 failed_bind:
2741         device_unregister(data->dev);
2742 failed_drvdata:
2743         ieee80211_free_hw(hw);
2744 failed:
2745         return err;
2746 }
2747
2748 static void hwsim_mcast_del_radio(int id, const char *hwname,
2749                                   struct genl_info *info)
2750 {
2751         struct sk_buff *skb;
2752         void *data;
2753         int ret;
2754
2755         skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2756         if (!skb)
2757                 return;
2758
2759         data = genlmsg_put(skb, 0, 0, &hwsim_genl_family, 0,
2760                            HWSIM_CMD_DEL_RADIO);
2761         if (!data)
2762                 goto error;
2763
2764         ret = nla_put_u32(skb, HWSIM_ATTR_RADIO_ID, id);
2765         if (ret < 0)
2766                 goto error;
2767
2768         ret = nla_put(skb, HWSIM_ATTR_RADIO_NAME, strlen(hwname),
2769                       hwname);
2770         if (ret < 0)
2771                 goto error;
2772
2773         genlmsg_end(skb, data);
2774
2775         hwsim_mcast_config_msg(skb, info);
2776
2777         return;
2778
2779 error:
2780         nlmsg_free(skb);
2781 }
2782
2783 static void mac80211_hwsim_del_radio(struct mac80211_hwsim_data *data,
2784                                      const char *hwname,
2785                                      struct genl_info *info)
2786 {
2787         hwsim_mcast_del_radio(data->idx, hwname, info);
2788         debugfs_remove_recursive(data->debugfs);
2789         ieee80211_unregister_hw(data->hw);
2790         device_release_driver(data->dev);
2791         device_unregister(data->dev);
2792         ieee80211_free_hw(data->hw);
2793 }
2794
2795 static int mac80211_hwsim_get_radio(struct sk_buff *skb,
2796                                     struct mac80211_hwsim_data *data,
2797                                     u32 portid, u32 seq,
2798                                     struct netlink_callback *cb, int flags)
2799 {
2800         void *hdr;
2801         struct hwsim_new_radio_params param = { };
2802         int res = -EMSGSIZE;
2803
2804         hdr = genlmsg_put(skb, portid, seq, &hwsim_genl_family, flags,
2805                           HWSIM_CMD_GET_RADIO);
2806         if (!hdr)
2807                 return -EMSGSIZE;
2808
2809         if (cb)
2810                 genl_dump_check_consistent(cb, hdr);
2811
2812         if (data->alpha2[0] && data->alpha2[1])
2813                 param.reg_alpha2 = data->alpha2;
2814
2815         param.reg_strict = !!(data->hw->wiphy->regulatory_flags &
2816                                         REGULATORY_STRICT_REG);
2817         param.p2p_device = !!(data->hw->wiphy->interface_modes &
2818                                         BIT(NL80211_IFTYPE_P2P_DEVICE));
2819         param.use_chanctx = data->use_chanctx;
2820         param.regd = data->regd;
2821         param.channels = data->channels;
2822         param.hwname = wiphy_name(data->hw->wiphy);
2823
2824         res = append_radio_msg(skb, data->idx, &param);
2825         if (res < 0)
2826                 goto out_err;
2827
2828         genlmsg_end(skb, hdr);
2829         return 0;
2830
2831 out_err:
2832         genlmsg_cancel(skb, hdr);
2833         return res;
2834 }
2835
2836 static void mac80211_hwsim_free(void)
2837 {
2838         struct mac80211_hwsim_data *data;
2839
2840         spin_lock_bh(&hwsim_radio_lock);
2841         while ((data = list_first_entry_or_null(&hwsim_radios,
2842                                                 struct mac80211_hwsim_data,
2843                                                 list))) {
2844                 list_del(&data->list);
2845                 spin_unlock_bh(&hwsim_radio_lock);
2846                 mac80211_hwsim_del_radio(data, wiphy_name(data->hw->wiphy),
2847                                          NULL);
2848                 spin_lock_bh(&hwsim_radio_lock);
2849         }
2850         spin_unlock_bh(&hwsim_radio_lock);
2851         class_destroy(hwsim_class);
2852 }
2853
2854 static const struct net_device_ops hwsim_netdev_ops = {
2855         .ndo_start_xmit         = hwsim_mon_xmit,
2856         .ndo_set_mac_address    = eth_mac_addr,
2857         .ndo_validate_addr      = eth_validate_addr,
2858 };
2859
2860 static void hwsim_mon_setup(struct net_device *dev)
2861 {
2862         dev->netdev_ops = &hwsim_netdev_ops;
2863         dev->needs_free_netdev = true;
2864         ether_setup(dev);
2865         dev->priv_flags |= IFF_NO_QUEUE;
2866         dev->type = ARPHRD_IEEE80211_RADIOTAP;
2867         eth_zero_addr(dev->dev_addr);
2868         dev->dev_addr[0] = 0x12;
2869 }
2870
2871 static struct mac80211_hwsim_data *get_hwsim_data_ref_from_addr(const u8 *addr)
2872 {
2873         struct mac80211_hwsim_data *data;
2874         bool _found = false;
2875
2876         spin_lock_bh(&hwsim_radio_lock);
2877         list_for_each_entry(data, &hwsim_radios, list) {
2878                 if (memcmp(data->addresses[1].addr, addr, ETH_ALEN) == 0) {
2879                         _found = true;
2880                         break;
2881                 }
2882         }
2883         spin_unlock_bh(&hwsim_radio_lock);
2884
2885         if (!_found)
2886                 return NULL;
2887
2888         return data;
2889 }
2890
2891 static void hwsim_register_wmediumd(struct net *net, u32 portid)
2892 {
2893         struct mac80211_hwsim_data *data;
2894
2895         hwsim_net_set_wmediumd(net, portid);
2896
2897         spin_lock_bh(&hwsim_radio_lock);
2898         list_for_each_entry(data, &hwsim_radios, list) {
2899                 if (data->netgroup == hwsim_net_get_netgroup(net))
2900                         data->wmediumd = portid;
2901         }
2902         spin_unlock_bh(&hwsim_radio_lock);
2903 }
2904
2905 static int hwsim_tx_info_frame_received_nl(struct sk_buff *skb_2,
2906                                            struct genl_info *info)
2907 {
2908
2909         struct ieee80211_hdr *hdr;
2910         struct mac80211_hwsim_data *data2;
2911         struct ieee80211_tx_info *txi;
2912         struct hwsim_tx_rate *tx_attempts;
2913         u64 ret_skb_cookie;
2914         struct sk_buff *skb, *tmp;
2915         const u8 *src;
2916         unsigned int hwsim_flags;
2917         int i;
2918         bool found = false;
2919
2920         if (!info->attrs[HWSIM_ATTR_ADDR_TRANSMITTER] ||
2921             !info->attrs[HWSIM_ATTR_FLAGS] ||
2922             !info->attrs[HWSIM_ATTR_COOKIE] ||
2923             !info->attrs[HWSIM_ATTR_SIGNAL] ||
2924             !info->attrs[HWSIM_ATTR_TX_INFO])
2925                 goto out;
2926
2927         src = (void *)nla_data(info->attrs[HWSIM_ATTR_ADDR_TRANSMITTER]);
2928         hwsim_flags = nla_get_u32(info->attrs[HWSIM_ATTR_FLAGS]);
2929         ret_skb_cookie = nla_get_u64(info->attrs[HWSIM_ATTR_COOKIE]);
2930
2931         data2 = get_hwsim_data_ref_from_addr(src);
2932         if (!data2)
2933                 goto out;
2934
2935         if (hwsim_net_get_netgroup(genl_info_net(info)) != data2->netgroup)
2936                 goto out;
2937
2938         if (info->snd_portid != data2->wmediumd)
2939                 goto out;
2940
2941         /* look for the skb matching the cookie passed back from user */
2942         skb_queue_walk_safe(&data2->pending, skb, tmp) {
2943                 u64 skb_cookie;
2944
2945                 txi = IEEE80211_SKB_CB(skb);
2946                 skb_cookie = (u64)(uintptr_t)txi->rate_driver_data[0];
2947
2948                 if (skb_cookie == ret_skb_cookie) {
2949                         skb_unlink(skb, &data2->pending);
2950                         found = true;
2951                         break;
2952                 }
2953         }
2954
2955         /* not found */
2956         if (!found)
2957                 goto out;
2958
2959         /* Tx info received because the frame was broadcasted on user space,
2960          so we get all the necessary info: tx attempts and skb control buff */
2961
2962         tx_attempts = (struct hwsim_tx_rate *)nla_data(
2963                        info->attrs[HWSIM_ATTR_TX_INFO]);
2964
2965         /* now send back TX status */
2966         txi = IEEE80211_SKB_CB(skb);
2967
2968         ieee80211_tx_info_clear_status(txi);
2969
2970         for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
2971                 txi->status.rates[i].idx = tx_attempts[i].idx;
2972                 txi->status.rates[i].count = tx_attempts[i].count;
2973                 /*txi->status.rates[i].flags = 0;*/
2974         }
2975
2976         txi->status.ack_signal = nla_get_u32(info->attrs[HWSIM_ATTR_SIGNAL]);
2977
2978         if (!(hwsim_flags & HWSIM_TX_CTL_NO_ACK) &&
2979            (hwsim_flags & HWSIM_TX_STAT_ACK)) {
2980                 if (skb->len >= 16) {
2981                         hdr = (struct ieee80211_hdr *) skb->data;
2982                         mac80211_hwsim_monitor_ack(data2->channel,
2983                                                    hdr->addr2);
2984                 }
2985                 txi->flags |= IEEE80211_TX_STAT_ACK;
2986         }
2987         ieee80211_tx_status_irqsafe(data2->hw, skb);
2988         return 0;
2989 out:
2990         return -EINVAL;
2991
2992 }
2993
2994 static int hwsim_cloned_frame_received_nl(struct sk_buff *skb_2,
2995                                           struct genl_info *info)
2996 {
2997         struct mac80211_hwsim_data *data2;
2998         struct ieee80211_rx_status rx_status;
2999         const u8 *dst;
3000         int frame_data_len;
3001         void *frame_data;
3002         struct sk_buff *skb = NULL;
3003
3004         if (!info->attrs[HWSIM_ATTR_ADDR_RECEIVER] ||
3005             !info->attrs[HWSIM_ATTR_FRAME] ||
3006             !info->attrs[HWSIM_ATTR_RX_RATE] ||
3007             !info->attrs[HWSIM_ATTR_SIGNAL])
3008                 goto out;
3009
3010         dst = (void *)nla_data(info->attrs[HWSIM_ATTR_ADDR_RECEIVER]);
3011         frame_data_len = nla_len(info->attrs[HWSIM_ATTR_FRAME]);
3012         frame_data = (void *)nla_data(info->attrs[HWSIM_ATTR_FRAME]);
3013
3014         /* Allocate new skb here */
3015         skb = alloc_skb(frame_data_len, GFP_KERNEL);
3016         if (skb == NULL)
3017                 goto err;
3018
3019         if (frame_data_len > IEEE80211_MAX_DATA_LEN)
3020                 goto err;
3021
3022         /* Copy the data */
3023         skb_put_data(skb, frame_data, frame_data_len);
3024
3025         data2 = get_hwsim_data_ref_from_addr(dst);
3026         if (!data2)
3027                 goto out;
3028
3029         if (hwsim_net_get_netgroup(genl_info_net(info)) != data2->netgroup)
3030                 goto out;
3031
3032         if (info->snd_portid != data2->wmediumd)
3033                 goto out;
3034
3035         /* check if radio is configured properly */
3036
3037         if (data2->idle || !data2->started)
3038                 goto out;
3039
3040         /* A frame is received from user space */
3041         memset(&rx_status, 0, sizeof(rx_status));
3042         if (info->attrs[HWSIM_ATTR_FREQ]) {
3043                 /* throw away off-channel packets, but allow both the temporary
3044                  * ("hw" scan/remain-on-channel) and regular channel, since the
3045                  * internal datapath also allows this
3046                  */
3047                 mutex_lock(&data2->mutex);
3048                 rx_status.freq = nla_get_u32(info->attrs[HWSIM_ATTR_FREQ]);
3049
3050                 if (rx_status.freq != data2->channel->center_freq &&
3051                     (!data2->tmp_chan ||
3052                      rx_status.freq != data2->tmp_chan->center_freq)) {
3053                         mutex_unlock(&data2->mutex);
3054                         goto out;
3055                 }
3056                 mutex_unlock(&data2->mutex);
3057         } else {
3058                 rx_status.freq = data2->channel->center_freq;
3059         }
3060
3061         rx_status.band = data2->channel->band;
3062         rx_status.rate_idx = nla_get_u32(info->attrs[HWSIM_ATTR_RX_RATE]);
3063         rx_status.signal = nla_get_u32(info->attrs[HWSIM_ATTR_SIGNAL]);
3064
3065         memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
3066         data2->rx_pkts++;
3067         data2->rx_bytes += skb->len;
3068         ieee80211_rx_irqsafe(data2->hw, skb);
3069
3070         return 0;
3071 err:
3072         pr_debug("mac80211_hwsim: error occurred in %s\n", __func__);
3073 out:
3074         dev_kfree_skb(skb);
3075         return -EINVAL;
3076 }
3077
3078 static int hwsim_register_received_nl(struct sk_buff *skb_2,
3079                                       struct genl_info *info)
3080 {
3081         struct net *net = genl_info_net(info);
3082         struct mac80211_hwsim_data *data;
3083         int chans = 1;
3084
3085         spin_lock_bh(&hwsim_radio_lock);
3086         list_for_each_entry(data, &hwsim_radios, list)
3087                 chans = max(chans, data->channels);
3088         spin_unlock_bh(&hwsim_radio_lock);
3089
3090         /* In the future we should revise the userspace API and allow it
3091          * to set a flag that it does support multi-channel, then we can
3092          * let this pass conditionally on the flag.
3093          * For current userspace, prohibit it since it won't work right.
3094          */
3095         if (chans > 1)
3096                 return -EOPNOTSUPP;
3097
3098         if (hwsim_net_get_wmediumd(net))
3099                 return -EBUSY;
3100
3101         hwsim_register_wmediumd(net, info->snd_portid);
3102
3103         pr_debug("mac80211_hwsim: received a REGISTER, "
3104                "switching to wmediumd mode with pid %d\n", info->snd_portid);
3105
3106         return 0;
3107 }
3108
3109 static int hwsim_new_radio_nl(struct sk_buff *msg, struct genl_info *info)
3110 {
3111         struct hwsim_new_radio_params param = { 0 };
3112         const char *hwname = NULL;
3113         int ret;
3114
3115         param.reg_strict = info->attrs[HWSIM_ATTR_REG_STRICT_REG];
3116         param.p2p_device = info->attrs[HWSIM_ATTR_SUPPORT_P2P_DEVICE];
3117         param.channels = channels;
3118         param.destroy_on_close =
3119                 info->attrs[HWSIM_ATTR_DESTROY_RADIO_ON_CLOSE];
3120
3121         if (info->attrs[HWSIM_ATTR_CHANNELS])
3122                 param.channels = nla_get_u32(info->attrs[HWSIM_ATTR_CHANNELS]);
3123
3124         if (param.channels > CFG80211_MAX_NUM_DIFFERENT_CHANNELS) {
3125                 GENL_SET_ERR_MSG(info, "too many channels specified");
3126                 return -EINVAL;
3127         }
3128
3129         if (info->attrs[HWSIM_ATTR_NO_VIF])
3130                 param.no_vif = true;
3131
3132         if (info->attrs[HWSIM_ATTR_RADIO_NAME]) {
3133                 hwname = kasprintf(GFP_KERNEL, "%.*s",
3134                                    nla_len(info->attrs[HWSIM_ATTR_RADIO_NAME]),
3135                                    (char *)nla_data(info->attrs[HWSIM_ATTR_RADIO_NAME]));
3136                 if (!hwname)
3137                         return -ENOMEM;
3138                 param.hwname = hwname;
3139         }
3140
3141         if (info->attrs[HWSIM_ATTR_USE_CHANCTX])
3142                 param.use_chanctx = true;
3143         else
3144                 param.use_chanctx = (param.channels > 1);
3145
3146         if (info->attrs[HWSIM_ATTR_REG_HINT_ALPHA2])
3147                 param.reg_alpha2 =
3148                         nla_data(info->attrs[HWSIM_ATTR_REG_HINT_ALPHA2]);
3149
3150         if (info->attrs[HWSIM_ATTR_REG_CUSTOM_REG]) {
3151                 u32 idx = nla_get_u32(info->attrs[HWSIM_ATTR_REG_CUSTOM_REG]);
3152
3153                 if (idx >= ARRAY_SIZE(hwsim_world_regdom_custom))
3154                         return -EINVAL;
3155                 param.regd = hwsim_world_regdom_custom[idx];
3156         }
3157
3158         ret = mac80211_hwsim_new_radio(info, &param);
3159         kfree(hwname);
3160         return ret;
3161 }
3162
3163 static int hwsim_del_radio_nl(struct sk_buff *msg, struct genl_info *info)
3164 {
3165         struct mac80211_hwsim_data *data;
3166         s64 idx = -1;
3167         const char *hwname = NULL;
3168
3169         if (info->attrs[HWSIM_ATTR_RADIO_ID]) {
3170                 idx = nla_get_u32(info->attrs[HWSIM_ATTR_RADIO_ID]);
3171         } else if (info->attrs[HWSIM_ATTR_RADIO_NAME]) {
3172                 hwname = kasprintf(GFP_KERNEL, "%.*s",
3173                                    nla_len(info->attrs[HWSIM_ATTR_RADIO_NAME]),
3174                                    (char *)nla_data(info->attrs[HWSIM_ATTR_RADIO_NAME]));
3175                 if (!hwname)
3176                         return -ENOMEM;
3177         } else
3178                 return -EINVAL;
3179
3180         spin_lock_bh(&hwsim_radio_lock);
3181         list_for_each_entry(data, &hwsim_radios, list) {
3182                 if (idx >= 0) {
3183                         if (data->idx != idx)
3184                                 continue;
3185                 } else {
3186                         if (!hwname ||
3187                             strcmp(hwname, wiphy_name(data->hw->wiphy)))
3188                                 continue;
3189                 }
3190
3191                 if (!net_eq(wiphy_net(data->hw->wiphy), genl_info_net(info)))
3192                         continue;
3193
3194                 list_del(&data->list);
3195                 spin_unlock_bh(&hwsim_radio_lock);
3196                 mac80211_hwsim_del_radio(data, wiphy_name(data->hw->wiphy),
3197                                          info);
3198                 kfree(hwname);
3199                 return 0;
3200         }
3201         spin_unlock_bh(&hwsim_radio_lock);
3202
3203         kfree(hwname);
3204         return -ENODEV;
3205 }
3206
3207 static int hwsim_get_radio_nl(struct sk_buff *msg, struct genl_info *info)
3208 {
3209         struct mac80211_hwsim_data *data;
3210         struct sk_buff *skb;
3211         int idx, res = -ENODEV;
3212
3213         if (!info->attrs[HWSIM_ATTR_RADIO_ID])
3214                 return -EINVAL;
3215         idx = nla_get_u32(info->attrs[HWSIM_ATTR_RADIO_ID]);
3216
3217         spin_lock_bh(&hwsim_radio_lock);
3218         list_for_each_entry(data, &hwsim_radios, list) {
3219                 if (data->idx != idx)
3220                         continue;
3221
3222                 if (!net_eq(wiphy_net(data->hw->wiphy), genl_info_net(info)))
3223                         continue;
3224
3225                 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
3226                 if (!skb) {
3227                         res = -ENOMEM;
3228                         goto out_err;
3229                 }
3230
3231                 res = mac80211_hwsim_get_radio(skb, data, info->snd_portid,
3232                                                info->snd_seq, NULL, 0);
3233                 if (res < 0) {
3234                         nlmsg_free(skb);
3235                         goto out_err;
3236                 }
3237
3238                 genlmsg_reply(skb, info);
3239                 break;
3240         }
3241
3242 out_err:
3243         spin_unlock_bh(&hwsim_radio_lock);
3244
3245         return res;
3246 }
3247
3248 static int hwsim_dump_radio_nl(struct sk_buff *skb,
3249                                struct netlink_callback *cb)
3250 {
3251         int idx = cb->args[0];
3252         struct mac80211_hwsim_data *data = NULL;
3253         int res;
3254
3255         spin_lock_bh(&hwsim_radio_lock);
3256
3257         if (idx == hwsim_radio_idx)
3258                 goto done;
3259
3260         list_for_each_entry(data, &hwsim_radios, list) {
3261                 if (data->idx < idx)
3262                         continue;
3263
3264                 if (!net_eq(wiphy_net(data->hw->wiphy), sock_net(skb->sk)))
3265                         continue;
3266
3267                 res = mac80211_hwsim_get_radio(skb, data,
3268                                                NETLINK_CB(cb->skb).portid,
3269                                                cb->nlh->nlmsg_seq, cb,
3270                                                NLM_F_MULTI);
3271                 if (res < 0)
3272                         break;
3273
3274                 idx = data->idx + 1;
3275         }
3276
3277         cb->args[0] = idx;
3278
3279 done:
3280         spin_unlock_bh(&hwsim_radio_lock);
3281         return skb->len;
3282 }
3283
3284 /* Generic Netlink operations array */
3285 static const struct genl_ops hwsim_ops[] = {
3286         {
3287                 .cmd = HWSIM_CMD_REGISTER,
3288                 .policy = hwsim_genl_policy,
3289                 .doit = hwsim_register_received_nl,
3290                 .flags = GENL_UNS_ADMIN_PERM,
3291         },
3292         {
3293                 .cmd = HWSIM_CMD_FRAME,
3294                 .policy = hwsim_genl_policy,
3295                 .doit = hwsim_cloned_frame_received_nl,
3296         },
3297         {
3298                 .cmd = HWSIM_CMD_TX_INFO_FRAME,
3299                 .policy = hwsim_genl_policy,
3300                 .doit = hwsim_tx_info_frame_received_nl,
3301         },
3302         {
3303                 .cmd = HWSIM_CMD_NEW_RADIO,
3304                 .policy = hwsim_genl_policy,
3305                 .doit = hwsim_new_radio_nl,
3306                 .flags = GENL_UNS_ADMIN_PERM,
3307         },
3308         {
3309                 .cmd = HWSIM_CMD_DEL_RADIO,
3310                 .policy = hwsim_genl_policy,
3311                 .doit = hwsim_del_radio_nl,
3312                 .flags = GENL_UNS_ADMIN_PERM,
3313         },
3314         {
3315                 .cmd = HWSIM_CMD_GET_RADIO,
3316                 .policy = hwsim_genl_policy,
3317                 .doit = hwsim_get_radio_nl,
3318                 .dumpit = hwsim_dump_radio_nl,
3319         },
3320 };
3321
3322 static struct genl_family hwsim_genl_family __ro_after_init = {
3323         .name = "MAC80211_HWSIM",
3324         .version = 1,
3325         .maxattr = HWSIM_ATTR_MAX,
3326         .netnsok = true,
3327         .module = THIS_MODULE,
3328         .ops = hwsim_ops,
3329         .n_ops = ARRAY_SIZE(hwsim_ops),
3330         .mcgrps = hwsim_mcgrps,
3331         .n_mcgrps = ARRAY_SIZE(hwsim_mcgrps),
3332 };
3333
3334 static void destroy_radio(struct work_struct *work)
3335 {
3336         struct mac80211_hwsim_data *data =
3337                 container_of(work, struct mac80211_hwsim_data, destroy_work);
3338
3339         mac80211_hwsim_del_radio(data, wiphy_name(data->hw->wiphy), NULL);
3340 }
3341
3342 static void remove_user_radios(u32 portid)
3343 {
3344         struct mac80211_hwsim_data *entry, *tmp;
3345
3346         spin_lock_bh(&hwsim_radio_lock);
3347         list_for_each_entry_safe(entry, tmp, &hwsim_radios, list) {
3348                 if (entry->destroy_on_close && entry->portid == portid) {
3349                         list_del(&entry->list);
3350                         INIT_WORK(&entry->destroy_work, destroy_radio);
3351                         queue_work(hwsim_wq, &entry->destroy_work);
3352                 }
3353         }
3354         spin_unlock_bh(&hwsim_radio_lock);
3355 }
3356
3357 static int mac80211_hwsim_netlink_notify(struct notifier_block *nb,
3358                                          unsigned long state,
3359                                          void *_notify)
3360 {
3361         struct netlink_notify *notify = _notify;
3362
3363         if (state != NETLINK_URELEASE)
3364                 return NOTIFY_DONE;
3365
3366         remove_user_radios(notify->portid);
3367
3368         if (notify->portid == hwsim_net_get_wmediumd(notify->net)) {
3369                 printk(KERN_INFO "mac80211_hwsim: wmediumd released netlink"
3370                        " socket, switching to perfect channel medium\n");
3371                 hwsim_register_wmediumd(notify->net, 0);
3372         }
3373         return NOTIFY_DONE;
3374
3375 }
3376
3377 static struct notifier_block hwsim_netlink_notifier = {
3378         .notifier_call = mac80211_hwsim_netlink_notify,
3379 };
3380
3381 static int __init hwsim_init_netlink(void)
3382 {
3383         int rc;
3384
3385         printk(KERN_INFO "mac80211_hwsim: initializing netlink\n");
3386
3387         rc = genl_register_family(&hwsim_genl_family);
3388         if (rc)
3389                 goto failure;
3390
3391         rc = netlink_register_notifier(&hwsim_netlink_notifier);
3392         if (rc) {
3393                 genl_unregister_family(&hwsim_genl_family);
3394                 goto failure;
3395         }
3396
3397         return 0;
3398
3399 failure:
3400         pr_debug("mac80211_hwsim: error occurred in %s\n", __func__);
3401         return -EINVAL;
3402 }
3403
3404 static __net_init int hwsim_init_net(struct net *net)
3405 {
3406         hwsim_net_set_netgroup(net);
3407
3408         return 0;
3409 }
3410
3411 static void __net_exit hwsim_exit_net(struct net *net)
3412 {
3413         struct mac80211_hwsim_data *data, *tmp;
3414
3415         spin_lock_bh(&hwsim_radio_lock);
3416         list_for_each_entry_safe(data, tmp, &hwsim_radios, list) {
3417                 if (!net_eq(wiphy_net(data->hw->wiphy), net))
3418                         continue;
3419
3420                 /* Radios created in init_net are returned to init_net. */
3421                 if (data->netgroup == hwsim_net_get_netgroup(&init_net))
3422                         continue;
3423
3424                 list_del(&data->list);
3425                 INIT_WORK(&data->destroy_work, destroy_radio);
3426                 queue_work(hwsim_wq, &data->destroy_work);
3427         }
3428         spin_unlock_bh(&hwsim_radio_lock);
3429 }
3430
3431 static struct pernet_operations hwsim_net_ops = {
3432         .init = hwsim_init_net,
3433         .exit = hwsim_exit_net,
3434         .id   = &hwsim_net_id,
3435         .size = sizeof(struct hwsim_net),
3436 };
3437
3438 static void hwsim_exit_netlink(void)
3439 {
3440         /* unregister the notifier */
3441         netlink_unregister_notifier(&hwsim_netlink_notifier);
3442         /* unregister the family */
3443         genl_unregister_family(&hwsim_genl_family);
3444 }
3445
3446 static int __init init_mac80211_hwsim(void)
3447 {
3448         int i, err;
3449
3450         if (radios < 0 || radios > 100)
3451                 return -EINVAL;
3452
3453         if (channels < 1)
3454                 return -EINVAL;
3455
3456         spin_lock_init(&hwsim_radio_lock);
3457
3458         hwsim_wq = alloc_workqueue("hwsim_wq",WQ_MEM_RECLAIM,0);
3459         if (!hwsim_wq)
3460                 return -ENOMEM;
3461
3462         err = register_pernet_device(&hwsim_net_ops);
3463         if (err)
3464                 return err;
3465
3466         err = platform_driver_register(&mac80211_hwsim_driver);
3467         if (err)
3468                 goto out_unregister_pernet;
3469
3470         hwsim_class = class_create(THIS_MODULE, "mac80211_hwsim");
3471         if (IS_ERR(hwsim_class)) {
3472                 err = PTR_ERR(hwsim_class);
3473                 goto out_unregister_driver;
3474         }
3475
3476         err = hwsim_init_netlink();
3477         if (err < 0)
3478                 goto out_unregister_driver;
3479
3480         for (i = 0; i < radios; i++) {
3481                 struct hwsim_new_radio_params param = { 0 };
3482
3483                 param.channels = channels;
3484
3485                 switch (regtest) {
3486                 case HWSIM_REGTEST_DIFF_COUNTRY:
3487                         if (i < ARRAY_SIZE(hwsim_alpha2s))
3488                                 param.reg_alpha2 = hwsim_alpha2s[i];
3489                         break;
3490                 case HWSIM_REGTEST_DRIVER_REG_FOLLOW:
3491                         if (!i)
3492                                 param.reg_alpha2 = hwsim_alpha2s[0];
3493                         break;
3494                 case HWSIM_REGTEST_STRICT_ALL:
3495                         param.reg_strict = true;
3496                 case HWSIM_REGTEST_DRIVER_REG_ALL:
3497                         param.reg_alpha2 = hwsim_alpha2s[0];
3498                         break;
3499                 case HWSIM_REGTEST_WORLD_ROAM:
3500                         if (i == 0)
3501                                 param.regd = &hwsim_world_regdom_custom_01;
3502                         break;
3503                 case HWSIM_REGTEST_CUSTOM_WORLD:
3504                         param.regd = &hwsim_world_regdom_custom_01;
3505                         break;
3506                 case HWSIM_REGTEST_CUSTOM_WORLD_2:
3507                         if (i == 0)
3508                                 param.regd = &hwsim_world_regdom_custom_01;
3509                         else if (i == 1)
3510                                 param.regd = &hwsim_world_regdom_custom_02;
3511                         break;
3512                 case HWSIM_REGTEST_STRICT_FOLLOW:
3513                         if (i == 0) {
3514                                 param.reg_strict = true;
3515                                 param.reg_alpha2 = hwsim_alpha2s[0];
3516                         }
3517                         break;
3518                 case HWSIM_REGTEST_STRICT_AND_DRIVER_REG:
3519                         if (i == 0) {
3520                                 param.reg_strict = true;
3521                                 param.reg_alpha2 = hwsim_alpha2s[0];
3522                         } else if (i == 1) {
3523                                 param.reg_alpha2 = hwsim_alpha2s[1];
3524                         }
3525                         break;
3526                 case HWSIM_REGTEST_ALL:
3527                         switch (i) {
3528                         case 0:
3529                                 param.regd = &hwsim_world_regdom_custom_01;
3530                                 break;
3531                         case 1:
3532                                 param.regd = &hwsim_world_regdom_custom_02;
3533                                 break;
3534                         case 2:
3535                                 param.reg_alpha2 = hwsim_alpha2s[0];
3536                                 break;
3537                         case 3:
3538                                 param.reg_alpha2 = hwsim_alpha2s[1];
3539                                 break;
3540                         case 4:
3541                                 param.reg_strict = true;
3542                                 param.reg_alpha2 = hwsim_alpha2s[2];
3543                                 break;
3544                         }
3545                         break;
3546                 default:
3547                         break;
3548                 }
3549
3550                 param.p2p_device = support_p2p_device;
3551                 param.use_chanctx = channels > 1;
3552
3553                 err = mac80211_hwsim_new_radio(NULL, &param);
3554                 if (err < 0)
3555                         goto out_free_radios;
3556         }
3557
3558         hwsim_mon = alloc_netdev(0, "hwsim%d", NET_NAME_UNKNOWN,
3559                                  hwsim_mon_setup);
3560         if (hwsim_mon == NULL) {
3561                 err = -ENOMEM;
3562                 goto out_free_radios;
3563         }
3564
3565         rtnl_lock();
3566         err = dev_alloc_name(hwsim_mon, hwsim_mon->name);
3567         if (err < 0) {
3568                 rtnl_unlock();
3569                 goto out_free_radios;
3570         }
3571
3572         err = register_netdevice(hwsim_mon);
3573         if (err < 0) {
3574                 rtnl_unlock();
3575                 goto out_free_mon;
3576         }
3577         rtnl_unlock();
3578
3579         return 0;
3580
3581 out_free_mon:
3582         free_netdev(hwsim_mon);
3583 out_free_radios:
3584         mac80211_hwsim_free();
3585 out_unregister_driver:
3586         platform_driver_unregister(&mac80211_hwsim_driver);
3587 out_unregister_pernet:
3588         unregister_pernet_device(&hwsim_net_ops);
3589         return err;
3590 }
3591 module_init(init_mac80211_hwsim);
3592
3593 static void __exit exit_mac80211_hwsim(void)
3594 {
3595         pr_debug("mac80211_hwsim: unregister radios\n");
3596
3597         hwsim_exit_netlink();
3598
3599         mac80211_hwsim_free();
3600         flush_workqueue(hwsim_wq);
3601
3602         unregister_netdev(hwsim_mon);
3603         platform_driver_unregister(&mac80211_hwsim_driver);
3604         unregister_pernet_device(&hwsim_net_ops);
3605         destroy_workqueue(hwsim_wq);
3606 }
3607 module_exit(exit_mac80211_hwsim);