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 <[email protected]>
   4  * Copyright (c) 2011, Javier Lopez <[email protected]>
   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 <linux/rhashtable.h>
  36 #include "mac80211_hwsim.h"
  37
  38 #define WARN_QUEUE 100
  39 #define MAX_QUEUE 200
  40
  41 MODULE_AUTHOR("Jouni Malinen");
  42 MODULE_DESCRIPTION("Software simulator of 802.11 radio(s) for mac80211");
  43 MODULE_LICENSE("GPL");
  44
  45 static int radios = 2;
  46 module_param(radios, int, 0444);
  47 MODULE_PARM_DESC(radios, "Number of simulated radios");
  48
  49 static int channels = 1;
  50 module_param(channels, int, 0444);
  51 MODULE_PARM_DESC(channels, "Number of concurrent channels");
  52
  53 static bool paged_rx = false;
  54 module_param(paged_rx, bool, 0644);
  55 MODULE_PARM_DESC(paged_rx, "Use paged SKBs for RX instead of linear ones");
  56
  57 static bool rctbl = false;
  58 module_param(rctbl, bool, 0444);
  59 MODULE_PARM_DESC(rctbl, "Handle rate control table");
  60
  61 static bool support_p2p_device = true;
  62 module_param(support_p2p_device, bool, 0444);
  63 MODULE_PARM_DESC(support_p2p_device, "Support P2P-Device interface type");
  64
  65 /**
  66  * enum hwsim_regtest - the type of regulatory tests we offer
  67  *
  68  * These are the different values you can use for the regtest
  69  * module parameter. This is useful to help test world roaming
  70  * and the driver regulatory_hint() call and combinations of these.
  71  * If you want to do specific alpha2 regulatory domain tests simply
  72  * use the userspace regulatory request as that will be respected as
  73  * well without the need of this module parameter. This is designed
  74  * only for testing the driver regulatory request, world roaming
  75  * and all possible combinations.
  76  *
  77  * @HWSIM_REGTEST_DISABLED: No regulatory tests are performed,
  78  *      this is the default value.
  79  * @HWSIM_REGTEST_DRIVER_REG_FOLLOW: Used for testing the driver regulatory
  80  *      hint, only one driver regulatory hint will be sent as such the
  81  *      secondary radios are expected to follow.
  82  * @HWSIM_REGTEST_DRIVER_REG_ALL: Used for testing the driver regulatory
  83  *      request with all radios reporting the same regulatory domain.
  84  * @HWSIM_REGTEST_DIFF_COUNTRY: Used for testing the drivers calling
  85  *      different regulatory domains requests. Expected behaviour is for
  86  *      an intersection to occur but each device will still use their
  87  *      respective regulatory requested domains. Subsequent radios will
  88  *      use the resulting intersection.
  89  * @HWSIM_REGTEST_WORLD_ROAM: Used for testing the world roaming. We accomplish
  90  *      this by using a custom beacon-capable regulatory domain for the first
  91  *      radio. All other device world roam.
  92  * @HWSIM_REGTEST_CUSTOM_WORLD: Used for testing the custom world regulatory
  93  *      domain requests. All radios will adhere to this custom world regulatory
  94  *      domain.
  95  * @HWSIM_REGTEST_CUSTOM_WORLD_2: Used for testing 2 custom world regulatory
  96  *      domain requests. The first radio will adhere to the first custom world
  97  *      regulatory domain, the second one to the second custom world regulatory
  98  *      domain. All other devices will world roam.
  99  * @HWSIM_REGTEST_STRICT_FOLLOW_: Used for testing strict regulatory domain
 100  *      settings, only the first radio will send a regulatory domain request
 101  *      and use strict settings. The rest of the radios are expected to follow.
 102  * @HWSIM_REGTEST_STRICT_ALL: Used for testing strict regulatory domain
 103  *      settings. All radios will adhere to this.
 104  * @HWSIM_REGTEST_STRICT_AND_DRIVER_REG: Used for testing strict regulatory
 105  *      domain settings, combined with secondary driver regulatory domain
 106  *      settings. The first radio will get a strict regulatory domain setting
 107  *      using the first driver regulatory request and the second radio will use
 108  *      non-strict settings using the second driver regulatory request. All
 109  *      other devices should follow the intersection created between the
 110  *      first two.
 111  * @HWSIM_REGTEST_ALL: Used for testing every possible mix. You will need
 112  *      at least 6 radios for a complete test. We will test in this order:
 113  *      1 - driver custom world regulatory domain
 114  *      2 - second custom world regulatory domain
 115  *      3 - first driver regulatory domain request
 116  *      4 - second driver regulatory domain request
 117  *      5 - strict regulatory domain settings using the third driver regulatory
 118  *          domain request
 119  *      6 and on - should follow the intersection of the 3rd, 4rth and 5th radio
 120  *                 regulatory requests.
 121  */
 122 enum hwsim_regtest {
 123         HWSIM_REGTEST_DISABLED = 0,
 124         HWSIM_REGTEST_DRIVER_REG_FOLLOW = 1,
 125         HWSIM_REGTEST_DRIVER_REG_ALL = 2,
 126         HWSIM_REGTEST_DIFF_COUNTRY = 3,
 127         HWSIM_REGTEST_WORLD_ROAM = 4,
 128         HWSIM_REGTEST_CUSTOM_WORLD = 5,
 129         HWSIM_REGTEST_CUSTOM_WORLD_2 = 6,
 130         HWSIM_REGTEST_STRICT_FOLLOW = 7,
 131         HWSIM_REGTEST_STRICT_ALL = 8,
 132         HWSIM_REGTEST_STRICT_AND_DRIVER_REG = 9,
 133         HWSIM_REGTEST_ALL = 10,
 134 };
 135
 136 /* Set to one of the HWSIM_REGTEST_* values above */
 137 static int regtest = HWSIM_REGTEST_DISABLED;
 138 module_param(regtest, int, 0444);
 139 MODULE_PARM_DESC(regtest, "The type of regulatory test we want to run");
 140
 141 static const char *hwsim_alpha2s[] = {
 142         "FI",
 143         "AL",
 144         "US",
 145         "DE",
 146         "JP",
 147         "AL",
 148 };
 149
 150 static const struct ieee80211_regdomain hwsim_world_regdom_custom_01 = {
 151         .n_reg_rules = 4,
 152         .alpha2 =  "99",
 153         .reg_rules = {
 154                 REG_RULE(2412-10, 2462+10, 40, 0, 20, 0),
 155                 REG_RULE(2484-10, 2484+10, 40, 0, 20, 0),
 156                 REG_RULE(5150-10, 5240+10, 40, 0, 30, 0),
 157                 REG_RULE(5745-10, 5825+10, 40, 0, 30, 0),
 158         }
 159 };
 160
 161 static const struct ieee80211_regdomain hwsim_world_regdom_custom_02 = {
 162         .n_reg_rules = 2,
 163         .alpha2 =  "99",
 164         .reg_rules = {
 165                 REG_RULE(2412-10, 2462+10, 40, 0, 20, 0),
 166                 REG_RULE(5725-10, 5850+10, 40, 0, 30,
 167                          NL80211_RRF_NO_IR),
 168         }
 169 };
 170
 171 static const struct ieee80211_regdomain *hwsim_world_regdom_custom[] = {
 172         &hwsim_world_regdom_custom_01,
 173         &hwsim_world_regdom_custom_02,
 174 };
 175
 176 struct hwsim_vif_priv {
 177         u32 magic;
 178         u8 bssid[ETH_ALEN];
 179         bool assoc;
 180         bool bcn_en;
 181         u16 aid;
 182 };
 183
 184 #define HWSIM_VIF_MAGIC 0x69537748
 185
 186 static inline void hwsim_check_magic(struct ieee80211_vif *vif)
 187 {
 188         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 189         WARN(vp->magic != HWSIM_VIF_MAGIC,
 190              "Invalid VIF (%p) magic %#x, %pM, %d/%d\n",
 191              vif, vp->magic, vif->addr, vif->type, vif->p2p);
 192 }
 193
 194 static inline void hwsim_set_magic(struct ieee80211_vif *vif)
 195 {
 196         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 197         vp->magic = HWSIM_VIF_MAGIC;
 198 }
 199
 200 static inline void hwsim_clear_magic(struct ieee80211_vif *vif)
 201 {
 202         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 203         vp->magic = 0;
 204 }
 205
 206 struct hwsim_sta_priv {
 207         u32 magic;
 208 };
 209
 210 #define HWSIM_STA_MAGIC 0x6d537749
 211
 212 static inline void hwsim_check_sta_magic(struct ieee80211_sta *sta)
 213 {
 214         struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
 215         WARN_ON(sp->magic != HWSIM_STA_MAGIC);
 216 }
 217
 218 static inline void hwsim_set_sta_magic(struct ieee80211_sta *sta)
 219 {
 220         struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
 221         sp->magic = HWSIM_STA_MAGIC;
 222 }
 223
 224 static inline void hwsim_clear_sta_magic(struct ieee80211_sta *sta)
 225 {
 226         struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
 227         sp->magic = 0;
 228 }
 229
 230 struct hwsim_chanctx_priv {
 231         u32 magic;
 232 };
 233
 234 #define HWSIM_CHANCTX_MAGIC 0x6d53774a
 235
 236 static inline void hwsim_check_chanctx_magic(struct ieee80211_chanctx_conf *c)
 237 {
 238         struct hwsim_chanctx_priv *cp = (void *)c->drv_priv;
 239         WARN_ON(cp->magic != HWSIM_CHANCTX_MAGIC);
 240 }
 241
 242 static inline void hwsim_set_chanctx_magic(struct ieee80211_chanctx_conf *c)
 243 {
 244         struct hwsim_chanctx_priv *cp = (void *)c->drv_priv;
 245         cp->magic = HWSIM_CHANCTX_MAGIC;
 246 }
 247
 248 static inline void hwsim_clear_chanctx_magic(struct ieee80211_chanctx_conf *c)
 249 {
 250         struct hwsim_chanctx_priv *cp = (void *)c->drv_priv;
 251         cp->magic = 0;
 252 }
 253
 254 static unsigned int hwsim_net_id;
 255
 256 static int hwsim_netgroup;
 257
 258 struct hwsim_net {
 259         int netgroup;
 260         u32 wmediumd;
 261 };
 262
 263 static inline int hwsim_net_get_netgroup(struct net *net)
 264 {
 265         struct hwsim_net *hwsim_net = net_generic(net, hwsim_net_id);
 266
 267         return hwsim_net->netgroup;
 268 }
 269
 270 static inline void hwsim_net_set_netgroup(struct net *net)
 271 {
 272         struct hwsim_net *hwsim_net = net_generic(net, hwsim_net_id);
 273
 274         hwsim_net->netgroup = hwsim_netgroup++;
 275 }
 276
 277 static inline u32 hwsim_net_get_wmediumd(struct net *net)
 278 {
 279         struct hwsim_net *hwsim_net = net_generic(net, hwsim_net_id);
 280
 281         return hwsim_net->wmediumd;
 282 }
 283
 284 static inline void hwsim_net_set_wmediumd(struct net *net, u32 portid)
 285 {
 286         struct hwsim_net *hwsim_net = net_generic(net, hwsim_net_id);
 287
 288         hwsim_net->wmediumd = portid;
 289 }
 290
 291 static struct class *hwsim_class;
 292
 293 static struct net_device *hwsim_mon; /* global monitor netdev */
 294
 295 #define CHAN2G(_freq)  { \
 296         .band = NL80211_BAND_2GHZ, \
 297         .center_freq = (_freq), \
 298         .hw_value = (_freq), \
 299         .max_power = 20, \
 300 }
 301
 302 #define CHAN5G(_freq) { \
 303         .band = NL80211_BAND_5GHZ, \
 304         .center_freq = (_freq), \
 305         .hw_value = (_freq), \
 306         .max_power = 20, \
 307 }
 308
 309 static const struct ieee80211_channel hwsim_channels_2ghz[] = {
 310         CHAN2G(2412), /* Channel 1 */
 311         CHAN2G(2417), /* Channel 2 */
 312         CHAN2G(2422), /* Channel 3 */
 313         CHAN2G(2427), /* Channel 4 */
 314         CHAN2G(2432), /* Channel 5 */
 315         CHAN2G(2437), /* Channel 6 */
 316         CHAN2G(2442), /* Channel 7 */
 317         CHAN2G(2447), /* Channel 8 */
 318         CHAN2G(2452), /* Channel 9 */
 319         CHAN2G(2457), /* Channel 10 */
 320         CHAN2G(2462), /* Channel 11 */
 321         CHAN2G(2467), /* Channel 12 */
 322         CHAN2G(2472), /* Channel 13 */
 323         CHAN2G(2484), /* Channel 14 */
 324 };
 325
 326 static const struct ieee80211_channel hwsim_channels_5ghz[] = {
 327         CHAN5G(5180), /* Channel 36 */
 328         CHAN5G(5200), /* Channel 40 */
 329         CHAN5G(5220), /* Channel 44 */
 330         CHAN5G(5240), /* Channel 48 */
 331
 332         CHAN5G(5260), /* Channel 52 */
 333         CHAN5G(5280), /* Channel 56 */
 334         CHAN5G(5300), /* Channel 60 */
 335         CHAN5G(5320), /* Channel 64 */
 336
 337         CHAN5G(5500), /* Channel 100 */
 338         CHAN5G(5520), /* Channel 104 */
 339         CHAN5G(5540), /* Channel 108 */
 340         CHAN5G(5560), /* Channel 112 */
 341         CHAN5G(5580), /* Channel 116 */
 342         CHAN5G(5600), /* Channel 120 */
 343         CHAN5G(5620), /* Channel 124 */
 344         CHAN5G(5640), /* Channel 128 */
 345         CHAN5G(5660), /* Channel 132 */
 346         CHAN5G(5680), /* Channel 136 */
 347         CHAN5G(5700), /* Channel 140 */
 348
 349         CHAN5G(5745), /* Channel 149 */
 350         CHAN5G(5765), /* Channel 153 */
 351         CHAN5G(5785), /* Channel 157 */
 352         CHAN5G(5805), /* Channel 161 */
 353         CHAN5G(5825), /* Channel 165 */
 354         CHAN5G(5845), /* Channel 169 */
 355 };
 356
 357 static const struct ieee80211_rate hwsim_rates[] = {
 358         { .bitrate = 10 },
 359         { .bitrate = 20, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
 360         { .bitrate = 55, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
 361         { .bitrate = 110, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
 362         { .bitrate = 60 },
 363         { .bitrate = 90 },
 364         { .bitrate = 120 },
 365         { .bitrate = 180 },
 366         { .bitrate = 240 },
 367         { .bitrate = 360 },
 368         { .bitrate = 480 },
 369         { .bitrate = 540 }
 370 };
 371
 372 #define OUI_QCA 0x001374
 373 #define QCA_NL80211_SUBCMD_TEST 1
 374 enum qca_nl80211_vendor_subcmds {
 375         QCA_WLAN_VENDOR_ATTR_TEST = 8,
 376         QCA_WLAN_VENDOR_ATTR_MAX = QCA_WLAN_VENDOR_ATTR_TEST
 377 };
 378
 379 static const struct nla_policy
 380 hwsim_vendor_test_policy[QCA_WLAN_VENDOR_ATTR_MAX + 1] = {
 381         [QCA_WLAN_VENDOR_ATTR_MAX] = { .type = NLA_U32 },
 382 };
 383
 384 static int mac80211_hwsim_vendor_cmd_test(struct wiphy *wiphy,
 385                                           struct wireless_dev *wdev,
 386                                           const void *data, int data_len)
 387 {
 388         struct sk_buff *skb;
 389         struct nlattr *tb[QCA_WLAN_VENDOR_ATTR_MAX + 1];
 390         int err;
 391         u32 val;
 392
 393         err = nla_parse(tb, QCA_WLAN_VENDOR_ATTR_MAX, data, data_len,
 394                         hwsim_vendor_test_policy, NULL);
 395         if (err)
 396                 return err;
 397         if (!tb[QCA_WLAN_VENDOR_ATTR_TEST])
 398                 return -EINVAL;
 399         val = nla_get_u32(tb[QCA_WLAN_VENDOR_ATTR_TEST]);
 400         wiphy_dbg(wiphy, "%s: test=%u\n", __func__, val);
 401
 402         /* Send a vendor event as a test. Note that this would not normally be
 403          * done within a command handler, but rather, based on some other
 404          * trigger. For simplicity, this command is used to trigger the event
 405          * here.
 406          *
 407          * event_idx = 0 (index in mac80211_hwsim_vendor_commands)
 408          */
 409         skb = cfg80211_vendor_event_alloc(wiphy, wdev, 100, 0, GFP_KERNEL);
 410         if (skb) {
 411                 /* skb_put() or nla_put() will fill up data within
 412                  * NL80211_ATTR_VENDOR_DATA.
 413                  */
 414
 415                 /* Add vendor data */
 416                 nla_put_u32(skb, QCA_WLAN_VENDOR_ATTR_TEST, val + 1);
 417
 418                 /* Send the event - this will call nla_nest_end() */
 419                 cfg80211_vendor_event(skb, GFP_KERNEL);
 420         }
 421
 422         /* Send a response to the command */
 423         skb = cfg80211_vendor_cmd_alloc_reply_skb(wiphy, 10);
 424         if (!skb)
 425                 return -ENOMEM;
 426
 427         /* skb_put() or nla_put() will fill up data within
 428          * NL80211_ATTR_VENDOR_DATA
 429          */
 430         nla_put_u32(skb, QCA_WLAN_VENDOR_ATTR_TEST, val + 2);
 431
 432         return cfg80211_vendor_cmd_reply(skb);
 433 }
 434
 435 static struct wiphy_vendor_command mac80211_hwsim_vendor_commands[] = {
 436         {
 437                 .info = { .vendor_id = OUI_QCA,
 438                           .subcmd = QCA_NL80211_SUBCMD_TEST },
 439                 .flags = WIPHY_VENDOR_CMD_NEED_NETDEV,
 440                 .doit = mac80211_hwsim_vendor_cmd_test,
 441         }
 442 };
 443
 444 /* Advertise support vendor specific events */
 445 static const struct nl80211_vendor_cmd_info mac80211_hwsim_vendor_events[] = {
 446         { .vendor_id = OUI_QCA, .subcmd = 1 },
 447 };
 448
 449 static const struct ieee80211_iface_limit hwsim_if_limits[] = {
 450         { .max = 1, .types = BIT(NL80211_IFTYPE_ADHOC) },
 451         { .max = 2048,  .types = BIT(NL80211_IFTYPE_STATION) |
 452                                  BIT(NL80211_IFTYPE_P2P_CLIENT) |
 453 #ifdef CONFIG_MAC80211_MESH
 454                                  BIT(NL80211_IFTYPE_MESH_POINT) |
 455 #endif
 456                                  BIT(NL80211_IFTYPE_AP) |
 457                                  BIT(NL80211_IFTYPE_P2P_GO) },
 458         /* must be last, see hwsim_if_comb */
 459         { .max = 1, .types = BIT(NL80211_IFTYPE_P2P_DEVICE) }
 460 };
 461
 462 static const struct ieee80211_iface_combination hwsim_if_comb[] = {
 463         {
 464                 .limits = hwsim_if_limits,
 465                 /* remove the last entry which is P2P_DEVICE */
 466                 .n_limits = ARRAY_SIZE(hwsim_if_limits) - 1,
 467                 .max_interfaces = 2048,
 468                 .num_different_channels = 1,
 469                 .radar_detect_widths = BIT(NL80211_CHAN_WIDTH_20_NOHT) |
 470                                        BIT(NL80211_CHAN_WIDTH_20) |
 471                                        BIT(NL80211_CHAN_WIDTH_40) |
 472                                        BIT(NL80211_CHAN_WIDTH_80) |
 473                                        BIT(NL80211_CHAN_WIDTH_160),
 474         },
 475 };
 476
 477 static const struct ieee80211_iface_combination hwsim_if_comb_p2p_dev[] = {
 478         {
 479                 .limits = hwsim_if_limits,
 480                 .n_limits = ARRAY_SIZE(hwsim_if_limits),
 481                 .max_interfaces = 2048,
 482                 .num_different_channels = 1,
 483                 .radar_detect_widths = BIT(NL80211_CHAN_WIDTH_20_NOHT) |
 484                                        BIT(NL80211_CHAN_WIDTH_20) |
 485                                        BIT(NL80211_CHAN_WIDTH_40) |
 486                                        BIT(NL80211_CHAN_WIDTH_80) |
 487                                        BIT(NL80211_CHAN_WIDTH_160),
 488         },
 489 };
 490
 491 static spinlock_t hwsim_radio_lock;
 492 static LIST_HEAD(hwsim_radios);
 493 static struct workqueue_struct *hwsim_wq;
 494 static struct rhashtable hwsim_radios_rht;
 495 static int hwsim_radio_idx;
 496
 497 static struct platform_driver mac80211_hwsim_driver = {
 498         .driver = {
 499                 .name = "mac80211_hwsim",
 500         },
 501 };
 502
 503 struct mac80211_hwsim_data {
 504         struct list_head list;
 505         struct rhash_head rht;
 506         struct ieee80211_hw *hw;
 507         struct device *dev;
 508         struct ieee80211_supported_band bands[NUM_NL80211_BANDS];
 509         struct ieee80211_channel channels_2ghz[ARRAY_SIZE(hwsim_channels_2ghz)];
 510         struct ieee80211_channel channels_5ghz[ARRAY_SIZE(hwsim_channels_5ghz)];
 511         struct ieee80211_rate rates[ARRAY_SIZE(hwsim_rates)];
 512         struct ieee80211_iface_combination if_combination;
 513
 514         struct mac_address addresses[2];
 515         int channels, idx;
 516         bool use_chanctx;
 517         bool destroy_on_close;
 518         struct work_struct destroy_work;
 519         u32 portid;
 520         char alpha2[2];
 521         const struct ieee80211_regdomain *regd;
 522
 523         struct ieee80211_channel *tmp_chan;
 524         struct ieee80211_channel *roc_chan;
 525         u32 roc_duration;
 526         struct delayed_work roc_start;
 527         struct delayed_work roc_done;
 528         struct delayed_work hw_scan;
 529         struct cfg80211_scan_request *hw_scan_request;
 530         struct ieee80211_vif *hw_scan_vif;
 531         int scan_chan_idx;
 532         u8 scan_addr[ETH_ALEN];
 533         struct {
 534                 struct ieee80211_channel *channel;
 535                 unsigned long next_start, start, end;
 536         } survey_data[ARRAY_SIZE(hwsim_channels_2ghz) +
 537                       ARRAY_SIZE(hwsim_channels_5ghz)];
 538
 539         struct ieee80211_channel *channel;
 540         u64 beacon_int  /* beacon interval in us */;
 541         unsigned int rx_filter;
 542         bool started, idle, scanning;
 543         struct mutex mutex;
 544         struct tasklet_hrtimer beacon_timer;
 545         enum ps_mode {
 546                 PS_DISABLED, PS_ENABLED, PS_AUTO_POLL, PS_MANUAL_POLL
 547         } ps;
 548         bool ps_poll_pending;
 549         struct dentry *debugfs;
 550
 551         uintptr_t pending_cookie;
 552         struct sk_buff_head pending;    /* packets pending */
 553         /*
 554          * Only radios in the same group can communicate together (the
 555          * channel has to match too). Each bit represents a group. A
 556          * radio can be in more than one group.
 557          */
 558         u64 group;
 559
 560         /* group shared by radios created in the same netns */
 561         int netgroup;
 562         /* wmediumd portid responsible for netgroup of this radio */
 563         u32 wmediumd;
 564
 565         /* difference between this hw's clock and the real clock, in usecs */
 566         s64 tsf_offset;
 567         s64 bcn_delta;
 568         /* absolute beacon transmission time. Used to cover up "tx" delay. */
 569         u64 abs_bcn_ts;
 570
 571         /* Stats */
 572         u64 tx_pkts;
 573         u64 rx_pkts;
 574         u64 tx_bytes;
 575         u64 rx_bytes;
 576         u64 tx_dropped;
 577         u64 tx_failed;
 578 };
 579
 580 static const struct rhashtable_params hwsim_rht_params = {
 581         .nelem_hint = 2,
 582         .automatic_shrinking = true,
 583         .key_len = ETH_ALEN,
 584         .key_offset = offsetof(struct mac80211_hwsim_data, addresses[1]),
 585         .head_offset = offsetof(struct mac80211_hwsim_data, rht),
 586 };
 587
 588 struct hwsim_radiotap_hdr {
 589         struct ieee80211_radiotap_header hdr;
 590         __le64 rt_tsft;
 591         u8 rt_flags;
 592         u8 rt_rate;
 593         __le16 rt_channel;
 594         __le16 rt_chbitmask;
 595 } __packed;
 596
 597 struct hwsim_radiotap_ack_hdr {
 598         struct ieee80211_radiotap_header hdr;
 599         u8 rt_flags;
 600         u8 pad;
 601         __le16 rt_channel;
 602         __le16 rt_chbitmask;
 603 } __packed;
 604
 605 /* MAC80211_HWSIM netlink family */
 606 static struct genl_family hwsim_genl_family;
 607
 608 enum hwsim_multicast_groups {
 609         HWSIM_MCGRP_CONFIG,
 610 };
 611
 612 static const struct genl_multicast_group hwsim_mcgrps[] = {
 613         [HWSIM_MCGRP_CONFIG] = { .name = "config", },
 614 };
 615
 616 /* MAC80211_HWSIM netlink policy */
 617
 618 static const struct nla_policy hwsim_genl_policy[HWSIM_ATTR_MAX + 1] = {
 619         [HWSIM_ATTR_ADDR_RECEIVER] = { .type = NLA_UNSPEC, .len = ETH_ALEN },
 620         [HWSIM_ATTR_ADDR_TRANSMITTER] = { .type = NLA_UNSPEC, .len = ETH_ALEN },
 621         [HWSIM_ATTR_FRAME] = { .type = NLA_BINARY,
 622                                .len = IEEE80211_MAX_DATA_LEN },
 623         [HWSIM_ATTR_FLAGS] = { .type = NLA_U32 },
 624         [HWSIM_ATTR_RX_RATE] = { .type = NLA_U32 },
 625         [HWSIM_ATTR_SIGNAL] = { .type = NLA_U32 },
 626         [HWSIM_ATTR_TX_INFO] = { .type = NLA_UNSPEC,
 627                                  .len = IEEE80211_TX_MAX_RATES *
 628                                         sizeof(struct hwsim_tx_rate)},
 629         [HWSIM_ATTR_COOKIE] = { .type = NLA_U64 },
 630         [HWSIM_ATTR_CHANNELS] = { .type = NLA_U32 },
 631         [HWSIM_ATTR_RADIO_ID] = { .type = NLA_U32 },
 632         [HWSIM_ATTR_REG_HINT_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 633         [HWSIM_ATTR_REG_CUSTOM_REG] = { .type = NLA_U32 },
 634         [HWSIM_ATTR_REG_STRICT_REG] = { .type = NLA_FLAG },
 635         [HWSIM_ATTR_SUPPORT_P2P_DEVICE] = { .type = NLA_FLAG },
 636         [HWSIM_ATTR_DESTROY_RADIO_ON_CLOSE] = { .type = NLA_FLAG },
 637         [HWSIM_ATTR_RADIO_NAME] = { .type = NLA_STRING },
 638         [HWSIM_ATTR_NO_VIF] = { .type = NLA_FLAG },
 639         [HWSIM_ATTR_FREQ] = { .type = NLA_U32 },
 640 };
 641
 642 static void mac80211_hwsim_tx_frame(struct ieee80211_hw *hw,
 643                                     struct sk_buff *skb,
 644                                     struct ieee80211_channel *chan);
 645
 646 /* sysfs attributes */
 647 static void hwsim_send_ps_poll(void *dat, u8 *mac, struct ieee80211_vif *vif)
 648 {
 649         struct mac80211_hwsim_data *data = dat;
 650         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 651         struct sk_buff *skb;
 652         struct ieee80211_pspoll *pspoll;
 653
 654         if (!vp->assoc)
 655                 return;
 656
 657         wiphy_dbg(data->hw->wiphy,
 658                   "%s: send PS-Poll to %pM for aid %d\n",
 659                   __func__, vp->bssid, vp->aid);
 660
 661         skb = dev_alloc_skb(sizeof(*pspoll));
 662         if (!skb)
 663                 return;
 664         pspoll = skb_put(skb, sizeof(*pspoll));
 665         pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
 666                                             IEEE80211_STYPE_PSPOLL |
 667                                             IEEE80211_FCTL_PM);
 668         pspoll->aid = cpu_to_le16(0xc000 | vp->aid);
 669         memcpy(pspoll->bssid, vp->bssid, ETH_ALEN);
 670         memcpy(pspoll->ta, mac, ETH_ALEN);
 671
 672         rcu_read_lock();
 673         mac80211_hwsim_tx_frame(data->hw, skb,
 674                                 rcu_dereference(vif->chanctx_conf)->def.chan);
 675         rcu_read_unlock();
 676 }
 677
 678 static void hwsim_send_nullfunc(struct mac80211_hwsim_data *data, u8 *mac,
 679                                 struct ieee80211_vif *vif, int ps)
 680 {
 681         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 682         struct sk_buff *skb;
 683         struct ieee80211_hdr *hdr;
 684
 685         if (!vp->assoc)
 686                 return;
 687
 688         wiphy_dbg(data->hw->wiphy,
 689                   "%s: send data::nullfunc to %pM ps=%d\n",
 690                   __func__, vp->bssid, ps);
 691
 692         skb = dev_alloc_skb(sizeof(*hdr));
 693         if (!skb)
 694                 return;
 695         hdr = skb_put(skb, sizeof(*hdr) - ETH_ALEN);
 696         hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
 697                                          IEEE80211_STYPE_NULLFUNC |
 698                                          IEEE80211_FCTL_TODS |
 699                                          (ps ? IEEE80211_FCTL_PM : 0));
 700         hdr->duration_id = cpu_to_le16(0);
 701         memcpy(hdr->addr1, vp->bssid, ETH_ALEN);
 702         memcpy(hdr->addr2, mac, ETH_ALEN);
 703         memcpy(hdr->addr3, vp->bssid, ETH_ALEN);
 704
 705         rcu_read_lock();
 706         mac80211_hwsim_tx_frame(data->hw, skb,
 707                                 rcu_dereference(vif->chanctx_conf)->def.chan);
 708         rcu_read_unlock();
 709 }
 710
 711
 712 static void hwsim_send_nullfunc_ps(void *dat, u8 *mac,
 713                                    struct ieee80211_vif *vif)
 714 {
 715         struct mac80211_hwsim_data *data = dat;
 716         hwsim_send_nullfunc(data, mac, vif, 1);
 717 }
 718
 719 static void hwsim_send_nullfunc_no_ps(void *dat, u8 *mac,
 720                                       struct ieee80211_vif *vif)
 721 {
 722         struct mac80211_hwsim_data *data = dat;
 723         hwsim_send_nullfunc(data, mac, vif, 0);
 724 }
 725
 726 static int hwsim_fops_ps_read(void *dat, u64 *val)
 727 {
 728         struct mac80211_hwsim_data *data = dat;
 729         *val = data->ps;
 730         return 0;
 731 }
 732
 733 static int hwsim_fops_ps_write(void *dat, u64 val)
 734 {
 735         struct mac80211_hwsim_data *data = dat;
 736         enum ps_mode old_ps;
 737
 738         if (val != PS_DISABLED && val != PS_ENABLED && val != PS_AUTO_POLL &&
 739             val != PS_MANUAL_POLL)
 740                 return -EINVAL;
 741
 742         if (val == PS_MANUAL_POLL) {
 743                 if (data->ps != PS_ENABLED)
 744                         return -EINVAL;
 745                 local_bh_disable();
 746                 ieee80211_iterate_active_interfaces_atomic(
 747                         data->hw, IEEE80211_IFACE_ITER_NORMAL,
 748                         hwsim_send_ps_poll, data);
 749                 local_bh_enable();
 750                 return 0;
 751         }
 752         old_ps = data->ps;
 753         data->ps = val;
 754
 755         local_bh_disable();
 756         if (old_ps == PS_DISABLED && val != PS_DISABLED) {
 757                 ieee80211_iterate_active_interfaces_atomic(
 758                         data->hw, IEEE80211_IFACE_ITER_NORMAL,
 759                         hwsim_send_nullfunc_ps, data);
 760         } else if (old_ps != PS_DISABLED && val == PS_DISABLED) {
 761                 ieee80211_iterate_active_interfaces_atomic(
 762                         data->hw, IEEE80211_IFACE_ITER_NORMAL,
 763                         hwsim_send_nullfunc_no_ps, data);
 764         }
 765         local_bh_enable();
 766
 767         return 0;
 768 }
 769
 770 DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_ps, hwsim_fops_ps_read, hwsim_fops_ps_write,
 771                         "%llu\n");
 772
 773 static int hwsim_write_simulate_radar(void *dat, u64 val)
 774 {
 775         struct mac80211_hwsim_data *data = dat;
 776
 777         ieee80211_radar_detected(data->hw);
 778
 779         return 0;
 780 }
 781
 782 DEFINE_SIMPLE_ATTRIBUTE(hwsim_simulate_radar, NULL,
 783                         hwsim_write_simulate_radar, "%llu\n");
 784
 785 static int hwsim_fops_group_read(void *dat, u64 *val)
 786 {
 787         struct mac80211_hwsim_data *data = dat;
 788         *val = data->group;
 789         return 0;
 790 }
 791
 792 static int hwsim_fops_group_write(void *dat, u64 val)
 793 {
 794         struct mac80211_hwsim_data *data = dat;
 795         data->group = val;
 796         return 0;
 797 }
 798
 799 DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_group,
 800                         hwsim_fops_group_read, hwsim_fops_group_write,
 801                         "%llx\n");
 802
 803 static netdev_tx_t hwsim_mon_xmit(struct sk_buff *skb,
 804                                         struct net_device *dev)
 805 {
 806         /* TODO: allow packet injection */
 807         dev_kfree_skb(skb);
 808         return NETDEV_TX_OK;
 809 }
 810
 811 static inline u64 mac80211_hwsim_get_tsf_raw(void)
 812 {
 813         return ktime_to_us(ktime_get_real());
 814 }
 815
 816 static __le64 __mac80211_hwsim_get_tsf(struct mac80211_hwsim_data *data)
 817 {
 818         u64 now = mac80211_hwsim_get_tsf_raw();
 819         return cpu_to_le64(now + data->tsf_offset);
 820 }
 821
 822 static u64 mac80211_hwsim_get_tsf(struct ieee80211_hw *hw,
 823                                   struct ieee80211_vif *vif)
 824 {
 825         struct mac80211_hwsim_data *data = hw->priv;
 826         return le64_to_cpu(__mac80211_hwsim_get_tsf(data));
 827 }
 828
 829 static void mac80211_hwsim_set_tsf(struct ieee80211_hw *hw,
 830                 struct ieee80211_vif *vif, u64 tsf)
 831 {
 832         struct mac80211_hwsim_data *data = hw->priv;
 833         u64 now = mac80211_hwsim_get_tsf(hw, vif);
 834         u32 bcn_int = data->beacon_int;
 835         u64 delta = abs(tsf - now);
 836
 837         /* adjust after beaconing with new timestamp at old TBTT */
 838         if (tsf > now) {
 839                 data->tsf_offset += delta;
 840                 data->bcn_delta = do_div(delta, bcn_int);
 841         } else {
 842                 data->tsf_offset -= delta;
 843                 data->bcn_delta = -(s64)do_div(delta, bcn_int);
 844         }
 845 }
 846
 847 static void mac80211_hwsim_monitor_rx(struct ieee80211_hw *hw,
 848                                       struct sk_buff *tx_skb,
 849                                       struct ieee80211_channel *chan)
 850 {
 851         struct mac80211_hwsim_data *data = hw->priv;
 852         struct sk_buff *skb;
 853         struct hwsim_radiotap_hdr *hdr;
 854         u16 flags;
 855         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_skb);
 856         struct ieee80211_rate *txrate = ieee80211_get_tx_rate(hw, info);
 857
 858         if (WARN_ON(!txrate))
 859                 return;
 860
 861         if (!netif_running(hwsim_mon))
 862                 return;
 863
 864         skb = skb_copy_expand(tx_skb, sizeof(*hdr), 0, GFP_ATOMIC);
 865         if (skb == NULL)
 866                 return;
 867
 868         hdr = skb_push(skb, sizeof(*hdr));
 869         hdr->hdr.it_version = PKTHDR_RADIOTAP_VERSION;
 870         hdr->hdr.it_pad = 0;
 871         hdr->hdr.it_len = cpu_to_le16(sizeof(*hdr));
 872         hdr->hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
 873                                           (1 << IEEE80211_RADIOTAP_RATE) |
 874                                           (1 << IEEE80211_RADIOTAP_TSFT) |
 875                                           (1 << IEEE80211_RADIOTAP_CHANNEL));
 876         hdr->rt_tsft = __mac80211_hwsim_get_tsf(data);
 877         hdr->rt_flags = 0;
 878         hdr->rt_rate = txrate->bitrate / 5;
 879         hdr->rt_channel = cpu_to_le16(chan->center_freq);
 880         flags = IEEE80211_CHAN_2GHZ;
 881         if (txrate->flags & IEEE80211_RATE_ERP_G)
 882                 flags |= IEEE80211_CHAN_OFDM;
 883         else
 884                 flags |= IEEE80211_CHAN_CCK;
 885         hdr->rt_chbitmask = cpu_to_le16(flags);
 886
 887         skb->dev = hwsim_mon;
 888         skb_reset_mac_header(skb);
 889         skb->ip_summed = CHECKSUM_UNNECESSARY;
 890         skb->pkt_type = PACKET_OTHERHOST;
 891         skb->protocol = htons(ETH_P_802_2);
 892         memset(skb->cb, 0, sizeof(skb->cb));
 893         netif_rx(skb);
 894 }
 895
 896
 897 static void mac80211_hwsim_monitor_ack(struct ieee80211_channel *chan,
 898                                        const u8 *addr)
 899 {
 900         struct sk_buff *skb;
 901         struct hwsim_radiotap_ack_hdr *hdr;
 902         u16 flags;
 903         struct ieee80211_hdr *hdr11;
 904
 905         if (!netif_running(hwsim_mon))
 906                 return;
 907
 908         skb = dev_alloc_skb(100);
 909         if (skb == NULL)
 910                 return;
 911
 912         hdr = skb_put(skb, sizeof(*hdr));
 913         hdr->hdr.it_version = PKTHDR_RADIOTAP_VERSION;
 914         hdr->hdr.it_pad = 0;
 915         hdr->hdr.it_len = cpu_to_le16(sizeof(*hdr));
 916         hdr->hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
 917                                           (1 << IEEE80211_RADIOTAP_CHANNEL));
 918         hdr->rt_flags = 0;
 919         hdr->pad = 0;
 920         hdr->rt_channel = cpu_to_le16(chan->center_freq);
 921         flags = IEEE80211_CHAN_2GHZ;
 922         hdr->rt_chbitmask = cpu_to_le16(flags);
 923
 924         hdr11 = skb_put(skb, 10);
 925         hdr11->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
 926                                            IEEE80211_STYPE_ACK);
 927         hdr11->duration_id = cpu_to_le16(0);
 928         memcpy(hdr11->addr1, addr, ETH_ALEN);
 929
 930         skb->dev = hwsim_mon;
 931         skb_reset_mac_header(skb);
 932         skb->ip_summed = CHECKSUM_UNNECESSARY;
 933         skb->pkt_type = PACKET_OTHERHOST;
 934         skb->protocol = htons(ETH_P_802_2);
 935         memset(skb->cb, 0, sizeof(skb->cb));
 936         netif_rx(skb);
 937 }
 938
 939 struct mac80211_hwsim_addr_match_data {
 940         u8 addr[ETH_ALEN];
 941         bool ret;
 942 };
 943
 944 static void mac80211_hwsim_addr_iter(void *data, u8 *mac,
 945                                      struct ieee80211_vif *vif)
 946 {
 947         struct mac80211_hwsim_addr_match_data *md = data;
 948
 949         if (memcmp(mac, md->addr, ETH_ALEN) == 0)
 950                 md->ret = true;
 951 }
 952
 953 static bool mac80211_hwsim_addr_match(struct mac80211_hwsim_data *data,
 954                                       const u8 *addr)
 955 {
 956         struct mac80211_hwsim_addr_match_data md = {
 957                 .ret = false,
 958         };
 959
 960         if (data->scanning && memcmp(addr, data->scan_addr, ETH_ALEN) == 0)
 961                 return true;
 962
 963         memcpy(md.addr, addr, ETH_ALEN);
 964
 965         ieee80211_iterate_active_interfaces_atomic(data->hw,
 966                                                    IEEE80211_IFACE_ITER_NORMAL,
 967                                                    mac80211_hwsim_addr_iter,
 968                                                    &md);
 969
 970         return md.ret;
 971 }
 972
 973 static bool hwsim_ps_rx_ok(struct mac80211_hwsim_data *data,
 974                            struct sk_buff *skb)
 975 {
 976         switch (data->ps) {
 977         case PS_DISABLED:
 978                 return true;
 979         case PS_ENABLED:
 980                 return false;
 981         case PS_AUTO_POLL:
 982                 /* TODO: accept (some) Beacons by default and other frames only
 983                  * if pending PS-Poll has been sent */
 984                 return true;
 985         case PS_MANUAL_POLL:
 986                 /* Allow unicast frames to own address if there is a pending
 987                  * PS-Poll */
 988                 if (data->ps_poll_pending &&
 989                     mac80211_hwsim_addr_match(data, skb->data + 4)) {
 990                         data->ps_poll_pending = false;
 991                         return true;
 992                 }
 993                 return false;
 994         }
 995
 996         return true;
 997 }
 998
 999 static int hwsim_unicast_netgroup(struct mac80211_hwsim_data *data,
1000                                   struct sk_buff *skb, int portid)
1001 {
1002         struct net *net;
1003         bool found = false;
1004         int res = -ENOENT;
1005
1006         rcu_read_lock();
1007         for_each_net_rcu(net) {
1008                 if (data->netgroup == hwsim_net_get_netgroup(net)) {
1009                         res = genlmsg_unicast(net, skb, portid);
1010                         found = true;
1011                         break;
1012                 }
1013         }
1014         rcu_read_unlock();
1015
1016         if (!found)
1017                 nlmsg_free(skb);
1018
1019         return res;
1020 }
1021
1022 static inline u16 trans_tx_rate_flags_ieee2hwsim(struct ieee80211_tx_rate *rate)
1023 {
1024         u16 result = 0;
1025
1026         if (rate->flags & IEEE80211_TX_RC_USE_RTS_CTS)
1027                 result |= MAC80211_HWSIM_TX_RC_USE_RTS_CTS;
1028         if (rate->flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
1029                 result |= MAC80211_HWSIM_TX_RC_USE_CTS_PROTECT;
1030         if (rate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
1031                 result |= MAC80211_HWSIM_TX_RC_USE_SHORT_PREAMBLE;
1032         if (rate->flags & IEEE80211_TX_RC_MCS)
1033                 result |= MAC80211_HWSIM_TX_RC_MCS;
1034         if (rate->flags & IEEE80211_TX_RC_GREEN_FIELD)
1035                 result |= MAC80211_HWSIM_TX_RC_GREEN_FIELD;
1036         if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
1037                 result |= MAC80211_HWSIM_TX_RC_40_MHZ_WIDTH;
1038         if (rate->flags & IEEE80211_TX_RC_DUP_DATA)
1039                 result |= MAC80211_HWSIM_TX_RC_DUP_DATA;
1040         if (rate->flags & IEEE80211_TX_RC_SHORT_GI)
1041                 result |= MAC80211_HWSIM_TX_RC_SHORT_GI;
1042         if (rate->flags & IEEE80211_TX_RC_VHT_MCS)
1043                 result |= MAC80211_HWSIM_TX_RC_VHT_MCS;
1044         if (rate->flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
1045                 result |= MAC80211_HWSIM_TX_RC_80_MHZ_WIDTH;
1046         if (rate->flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
1047                 result |= MAC80211_HWSIM_TX_RC_160_MHZ_WIDTH;
1048
1049         return result;
1050 }
1051
1052 static void mac80211_hwsim_tx_frame_nl(struct ieee80211_hw *hw,
1053                                        struct sk_buff *my_skb,
1054                                        int dst_portid)
1055 {
1056         struct sk_buff *skb;
1057         struct mac80211_hwsim_data *data = hw->priv;
1058         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) my_skb->data;
1059         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(my_skb);
1060         void *msg_head;
1061         unsigned int hwsim_flags = 0;
1062         int i;
1063         struct hwsim_tx_rate tx_attempts[IEEE80211_TX_MAX_RATES];
1064         struct hwsim_tx_rate_flag tx_attempts_flags[IEEE80211_TX_MAX_RATES];
1065         uintptr_t cookie;
1066
1067         if (data->ps != PS_DISABLED)
1068                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1069         /* If the queue contains MAX_QUEUE skb's drop some */
1070         if (skb_queue_len(&data->pending) >= MAX_QUEUE) {
1071                 /* Droping until WARN_QUEUE level */
1072                 while (skb_queue_len(&data->pending) >= WARN_QUEUE) {
1073                         ieee80211_free_txskb(hw, skb_dequeue(&data->pending));
1074                         data->tx_dropped++;
1075                 }
1076         }
1077
1078         skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1079         if (skb == NULL)
1080                 goto nla_put_failure;
1081
1082         msg_head = genlmsg_put(skb, 0, 0, &hwsim_genl_family, 0,
1083                                HWSIM_CMD_FRAME);
1084         if (msg_head == NULL) {
1085                 pr_debug("mac80211_hwsim: problem with msg_head\n");
1086                 goto nla_put_failure;
1087         }
1088
1089         if (nla_put(skb, HWSIM_ATTR_ADDR_TRANSMITTER,
1090                     ETH_ALEN, data->addresses[1].addr))
1091                 goto nla_put_failure;
1092
1093         /* We get the skb->data */
1094         if (nla_put(skb, HWSIM_ATTR_FRAME, my_skb->len, my_skb->data))
1095                 goto nla_put_failure;
1096
1097         /* We get the flags for this transmission, and we translate them to
1098            wmediumd flags  */
1099
1100         if (info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS)
1101                 hwsim_flags |= HWSIM_TX_CTL_REQ_TX_STATUS;
1102
1103         if (info->flags & IEEE80211_TX_CTL_NO_ACK)
1104                 hwsim_flags |= HWSIM_TX_CTL_NO_ACK;
1105
1106         if (nla_put_u32(skb, HWSIM_ATTR_FLAGS, hwsim_flags))
1107                 goto nla_put_failure;
1108
1109         if (nla_put_u32(skb, HWSIM_ATTR_FREQ, data->channel->center_freq))
1110                 goto nla_put_failure;
1111
1112         /* We get the tx control (rate and retries) info*/
1113
1114         for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
1115                 tx_attempts[i].idx = info->status.rates[i].idx;
1116                 tx_attempts_flags[i].idx = info->status.rates[i].idx;
1117                 tx_attempts[i].count = info->status.rates[i].count;
1118                 tx_attempts_flags[i].flags =
1119                                 trans_tx_rate_flags_ieee2hwsim(
1120                                                 &info->status.rates[i]);
1121         }
1122
1123         if (nla_put(skb, HWSIM_ATTR_TX_INFO,
1124                     sizeof(struct hwsim_tx_rate)*IEEE80211_TX_MAX_RATES,
1125                     tx_attempts))
1126                 goto nla_put_failure;
1127
1128         if (nla_put(skb, HWSIM_ATTR_TX_INFO_FLAGS,
1129                     sizeof(struct hwsim_tx_rate_flag) * IEEE80211_TX_MAX_RATES,
1130                     tx_attempts_flags))
1131                 goto nla_put_failure;
1132
1133         /* We create a cookie to identify this skb */
1134         data->pending_cookie++;
1135         cookie = data->pending_cookie;
1136         info->rate_driver_data[0] = (void *)cookie;
1137         if (nla_put_u64_64bit(skb, HWSIM_ATTR_COOKIE, cookie, HWSIM_ATTR_PAD))
1138                 goto nla_put_failure;
1139
1140         genlmsg_end(skb, msg_head);
1141         if (hwsim_unicast_netgroup(data, skb, dst_portid))
1142                 goto err_free_txskb;
1143
1144         /* Enqueue the packet */
1145         skb_queue_tail(&data->pending, my_skb);
1146         data->tx_pkts++;
1147         data->tx_bytes += my_skb->len;
1148         return;
1149
1150 nla_put_failure:
1151         nlmsg_free(skb);
1152 err_free_txskb:
1153         pr_debug("mac80211_hwsim: error occurred in %s\n", __func__);
1154         ieee80211_free_txskb(hw, my_skb);
1155         data->tx_failed++;
1156 }
1157
1158 static bool hwsim_chans_compat(struct ieee80211_channel *c1,
1159                                struct ieee80211_channel *c2)
1160 {
1161         if (!c1 || !c2)
1162                 return false;
1163
1164         return c1->center_freq == c2->center_freq;
1165 }
1166
1167 struct tx_iter_data {
1168         struct ieee80211_channel *channel;
1169         bool receive;
1170 };
1171
1172 static void mac80211_hwsim_tx_iter(void *_data, u8 *addr,
1173                                    struct ieee80211_vif *vif)
1174 {
1175         struct tx_iter_data *data = _data;
1176
1177         if (!vif->chanctx_conf)
1178                 return;
1179
1180         if (!hwsim_chans_compat(data->channel,
1181                                 rcu_dereference(vif->chanctx_conf)->def.chan))
1182                 return;
1183
1184         data->receive = true;
1185 }
1186
1187 static void mac80211_hwsim_add_vendor_rtap(struct sk_buff *skb)
1188 {
1189         /*
1190          * To enable this code, #define the HWSIM_RADIOTAP_OUI,
1191          * e.g. like this:
1192          * #define HWSIM_RADIOTAP_OUI "\x02\x00\x00"
1193          * (but you should use a valid OUI, not that)
1194          *
1195          * If anyone wants to 'donate' a radiotap OUI/subns code
1196          * please send a patch removing this #ifdef and changing
1197          * the values accordingly.
1198          */
1199 #ifdef HWSIM_RADIOTAP_OUI
1200         struct ieee80211_vendor_radiotap *rtap;
1201
1202         /*
1203          * Note that this code requires the headroom in the SKB
1204          * that was allocated earlier.
1205          */
1206         rtap = skb_push(skb, sizeof(*rtap) + 8 + 4);
1207         rtap->oui[0] = HWSIM_RADIOTAP_OUI[0];
1208         rtap->oui[1] = HWSIM_RADIOTAP_OUI[1];
1209         rtap->oui[2] = HWSIM_RADIOTAP_OUI[2];
1210         rtap->subns = 127;
1211
1212         /*
1213          * Radiotap vendor namespaces can (and should) also be
1214          * split into fields by using the standard radiotap
1215          * presence bitmap mechanism. Use just BIT(0) here for
1216          * the presence bitmap.
1217          */
1218         rtap->present = BIT(0);
1219         /* We have 8 bytes of (dummy) data */
1220         rtap->len = 8;
1221         /* For testing, also require it to be aligned */
1222         rtap->align = 8;
1223         /* And also test that padding works, 4 bytes */
1224         rtap->pad = 4;
1225         /* push the data */
1226         memcpy(rtap->data, "ABCDEFGH", 8);
1227         /* make sure to clear padding, mac80211 doesn't */
1228         memset(rtap->data + 8, 0, 4);
1229
1230         IEEE80211_SKB_RXCB(skb)->flag |= RX_FLAG_RADIOTAP_VENDOR_DATA;
1231 #endif
1232 }
1233
1234 static bool mac80211_hwsim_tx_frame_no_nl(struct ieee80211_hw *hw,
1235                                           struct sk_buff *skb,
1236                                           struct ieee80211_channel *chan)
1237 {
1238         struct mac80211_hwsim_data *data = hw->priv, *data2;
1239         bool ack = false;
1240         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1241         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1242         struct ieee80211_rx_status rx_status;
1243         u64 now;
1244
1245         memset(&rx_status, 0, sizeof(rx_status));
1246         rx_status.flag |= RX_FLAG_MACTIME_START;
1247         rx_status.freq = chan->center_freq;
1248         rx_status.band = chan->band;
1249         if (info->control.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) {
1250                 rx_status.rate_idx =
1251                         ieee80211_rate_get_vht_mcs(&info->control.rates[0]);
1252                 rx_status.nss =
1253                         ieee80211_rate_get_vht_nss(&info->control.rates[0]);
1254                 rx_status.encoding = RX_ENC_VHT;
1255         } else {
1256                 rx_status.rate_idx = info->control.rates[0].idx;
1257                 if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS)
1258                         rx_status.encoding = RX_ENC_HT;
1259         }
1260         if (info->control.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
1261                 rx_status.bw = RATE_INFO_BW_40;
1262         else if (info->control.rates[0].flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
1263                 rx_status.bw = RATE_INFO_BW_80;
1264         else if (info->control.rates[0].flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
1265                 rx_status.bw = RATE_INFO_BW_160;
1266         else
1267                 rx_status.bw = RATE_INFO_BW_20;
1268         if (info->control.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
1269                 rx_status.enc_flags |= RX_ENC_FLAG_SHORT_GI;
1270         /* TODO: simulate real signal strength (and optional packet loss) */
1271         rx_status.signal = -50;
1272         if (info->control.vif)
1273                 rx_status.signal += info->control.vif->bss_conf.txpower;
1274
1275         if (data->ps != PS_DISABLED)
1276                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1277
1278         /* release the skb's source info */
1279         skb_orphan(skb);
1280         skb_dst_drop(skb);
1281         skb->mark = 0;
1282         secpath_reset(skb);
1283         nf_reset(skb);
1284
1285         /*
1286          * Get absolute mactime here so all HWs RX at the "same time", and
1287          * absolute TX time for beacon mactime so the timestamp matches.
1288          * Giving beacons a different mactime than non-beacons looks messy, but
1289          * it helps the Toffset be exact and a ~10us mactime discrepancy
1290          * probably doesn't really matter.
1291          */
1292         if (ieee80211_is_beacon(hdr->frame_control) ||
1293             ieee80211_is_probe_resp(hdr->frame_control))
1294                 now = data->abs_bcn_ts;
1295         else
1296                 now = mac80211_hwsim_get_tsf_raw();
1297
1298         /* Copy skb to all enabled radios that are on the current frequency */
1299         spin_lock(&hwsim_radio_lock);
1300         list_for_each_entry(data2, &hwsim_radios, list) {
1301                 struct sk_buff *nskb;
1302                 struct tx_iter_data tx_iter_data = {
1303                         .receive = false,
1304                         .channel = chan,
1305                 };
1306
1307                 if (data == data2)
1308                         continue;
1309
1310                 if (!data2->started || (data2->idle && !data2->tmp_chan) ||
1311                     !hwsim_ps_rx_ok(data2, skb))
1312                         continue;
1313
1314                 if (!(data->group & data2->group))
1315                         continue;
1316
1317                 if (data->netgroup != data2->netgroup)
1318                         continue;
1319
1320                 if (!hwsim_chans_compat(chan, data2->tmp_chan) &&
1321                     !hwsim_chans_compat(chan, data2->channel)) {
1322                         ieee80211_iterate_active_interfaces_atomic(
1323                                 data2->hw, IEEE80211_IFACE_ITER_NORMAL,
1324                                 mac80211_hwsim_tx_iter, &tx_iter_data);
1325                         if (!tx_iter_data.receive)
1326                                 continue;
1327                 }
1328
1329                 /*
1330                  * reserve some space for our vendor and the normal
1331                  * radiotap header, since we're copying anyway
1332                  */
1333                 if (skb->len < PAGE_SIZE && paged_rx) {
1334                         struct page *page = alloc_page(GFP_ATOMIC);
1335
1336                         if (!page)
1337                                 continue;
1338
1339                         nskb = dev_alloc_skb(128);
1340                         if (!nskb) {
1341                                 __free_page(page);
1342                                 continue;
1343                         }
1344
1345                         memcpy(page_address(page), skb->data, skb->len);
1346                         skb_add_rx_frag(nskb, 0, page, 0, skb->len, skb->len);
1347                 } else {
1348                         nskb = skb_copy(skb, GFP_ATOMIC);
1349                         if (!nskb)
1350                                 continue;
1351                 }
1352
1353                 if (mac80211_hwsim_addr_match(data2, hdr->addr1))
1354                         ack = true;
1355
1356                 rx_status.mactime = now + data2->tsf_offset;
1357
1358                 memcpy(IEEE80211_SKB_RXCB(nskb), &rx_status, sizeof(rx_status));
1359
1360                 mac80211_hwsim_add_vendor_rtap(nskb);
1361
1362                 data2->rx_pkts++;
1363                 data2->rx_bytes += nskb->len;
1364                 ieee80211_rx_irqsafe(data2->hw, nskb);
1365         }
1366         spin_unlock(&hwsim_radio_lock);
1367
1368         return ack;
1369 }
1370
1371 static void mac80211_hwsim_tx(struct ieee80211_hw *hw,
1372                               struct ieee80211_tx_control *control,
1373                               struct sk_buff *skb)
1374 {
1375         struct mac80211_hwsim_data *data = hw->priv;
1376         struct ieee80211_tx_info *txi = IEEE80211_SKB_CB(skb);
1377         struct ieee80211_hdr *hdr = (void *)skb->data;
1378         struct ieee80211_chanctx_conf *chanctx_conf;
1379         struct ieee80211_channel *channel;
1380         bool ack;
1381         u32 _portid;
1382
1383         if (WARN_ON(skb->len < 10)) {
1384                 /* Should not happen; just a sanity check for addr1 use */
1385                 ieee80211_free_txskb(hw, skb);
1386                 return;
1387         }
1388
1389         if (!data->use_chanctx) {
1390                 channel = data->channel;
1391         } else if (txi->hw_queue == 4) {
1392                 channel = data->tmp_chan;
1393         } else {
1394                 chanctx_conf = rcu_dereference(txi->control.vif->chanctx_conf);
1395                 if (chanctx_conf)
1396                         channel = chanctx_conf->def.chan;
1397                 else
1398                         channel = NULL;
1399         }
1400
1401         if (WARN(!channel, "TX w/o channel - queue = %d\n", txi->hw_queue)) {
1402                 ieee80211_free_txskb(hw, skb);
1403                 return;
1404         }
1405
1406         if (data->idle && !data->tmp_chan) {
1407                 wiphy_dbg(hw->wiphy, "Trying to TX when idle - reject\n");
1408                 ieee80211_free_txskb(hw, skb);
1409                 return;
1410         }
1411
1412         if (txi->control.vif)
1413                 hwsim_check_magic(txi->control.vif);
1414         if (control->sta)
1415                 hwsim_check_sta_magic(control->sta);
1416
1417         if (ieee80211_hw_check(hw, SUPPORTS_RC_TABLE))
1418                 ieee80211_get_tx_rates(txi->control.vif, control->sta, skb,
1419                                        txi->control.rates,
1420                                        ARRAY_SIZE(txi->control.rates));
1421
1422         if (skb->len >= 24 + 8 &&
1423             ieee80211_is_probe_resp(hdr->frame_control)) {
1424                 /* fake header transmission time */
1425                 struct ieee80211_mgmt *mgmt;
1426                 struct ieee80211_rate *txrate;
1427                 u64 ts;
1428
1429                 mgmt = (struct ieee80211_mgmt *)skb->data;
1430                 txrate = ieee80211_get_tx_rate(hw, txi);
1431                 ts = mac80211_hwsim_get_tsf_raw();
1432                 mgmt->u.probe_resp.timestamp =
1433                         cpu_to_le64(ts + data->tsf_offset +
1434                                     24 * 8 * 10 / txrate->bitrate);
1435         }
1436
1437         mac80211_hwsim_monitor_rx(hw, skb, channel);
1438
1439         /* wmediumd mode check */
1440         _portid = READ_ONCE(data->wmediumd);
1441
1442         if (_portid)
1443                 return mac80211_hwsim_tx_frame_nl(hw, skb, _portid);
1444
1445         /* NO wmediumd detected, perfect medium simulation */
1446         data->tx_pkts++;
1447         data->tx_bytes += skb->len;
1448         ack = mac80211_hwsim_tx_frame_no_nl(hw, skb, channel);
1449
1450         if (ack && skb->len >= 16)
1451                 mac80211_hwsim_monitor_ack(channel, hdr->addr2);
1452
1453         ieee80211_tx_info_clear_status(txi);
1454
1455         /* frame was transmitted at most favorable rate at first attempt */
1456         txi->control.rates[0].count = 1;
1457         txi->control.rates[1].idx = -1;
1458
1459         if (!(txi->flags & IEEE80211_TX_CTL_NO_ACK) && ack)
1460                 txi->flags |= IEEE80211_TX_STAT_ACK;
1461         ieee80211_tx_status_irqsafe(hw, skb);
1462 }
1463
1464
1465 static int mac80211_hwsim_start(struct ieee80211_hw *hw)
1466 {
1467         struct mac80211_hwsim_data *data = hw->priv;
1468         wiphy_dbg(hw->wiphy, "%s\n", __func__);
1469         data->started = true;
1470         return 0;
1471 }
1472
1473
1474 static void mac80211_hwsim_stop(struct ieee80211_hw *hw)
1475 {
1476         struct mac80211_hwsim_data *data = hw->priv;
1477         data->started = false;
1478         tasklet_hrtimer_cancel(&data->beacon_timer);
1479         wiphy_dbg(hw->wiphy, "%s\n", __func__);
1480 }
1481
1482
1483 static int mac80211_hwsim_add_interface(struct ieee80211_hw *hw,
1484                                         struct ieee80211_vif *vif)
1485 {
1486         wiphy_dbg(hw->wiphy, "%s (type=%d mac_addr=%pM)\n",
1487                   __func__, ieee80211_vif_type_p2p(vif),
1488                   vif->addr);
1489         hwsim_set_magic(vif);
1490
1491         vif->cab_queue = 0;
1492         vif->hw_queue[IEEE80211_AC_VO] = 0;
1493         vif->hw_queue[IEEE80211_AC_VI] = 1;
1494         vif->hw_queue[IEEE80211_AC_BE] = 2;
1495         vif->hw_queue[IEEE80211_AC_BK] = 3;
1496
1497         return 0;
1498 }
1499
1500
1501 static int mac80211_hwsim_change_interface(struct ieee80211_hw *hw,
1502                                            struct ieee80211_vif *vif,
1503                                            enum nl80211_iftype newtype,
1504                                            bool newp2p)
1505 {
1506         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1507         wiphy_dbg(hw->wiphy,
1508                   "%s (old type=%d, new type=%d, mac_addr=%pM)\n",
1509                   __func__, ieee80211_vif_type_p2p(vif),
1510                     newtype, vif->addr);
1511         hwsim_check_magic(vif);
1512
1513         /*
1514          * interface may change from non-AP to AP in
1515          * which case this needs to be set up again
1516          */
1517         vif->cab_queue = 0;
1518
1519         return 0;
1520 }
1521
1522 static void mac80211_hwsim_remove_interface(
1523         struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1524 {
1525         wiphy_dbg(hw->wiphy, "%s (type=%d mac_addr=%pM)\n",
1526                   __func__, ieee80211_vif_type_p2p(vif),
1527                   vif->addr);
1528         hwsim_check_magic(vif);
1529         hwsim_clear_magic(vif);
1530 }
1531
1532 static void mac80211_hwsim_tx_frame(struct ieee80211_hw *hw,
1533                                     struct sk_buff *skb,
1534                                     struct ieee80211_channel *chan)
1535 {
1536         struct mac80211_hwsim_data *data = hw->priv;
1537         u32 _pid = READ_ONCE(data->wmediumd);
1538
1539         if (ieee80211_hw_check(hw, SUPPORTS_RC_TABLE)) {
1540                 struct ieee80211_tx_info *txi = IEEE80211_SKB_CB(skb);
1541                 ieee80211_get_tx_rates(txi->control.vif, NULL, skb,
1542                                        txi->control.rates,
1543                                        ARRAY_SIZE(txi->control.rates));
1544         }
1545
1546         mac80211_hwsim_monitor_rx(hw, skb, chan);
1547
1548         if (_pid)
1549                 return mac80211_hwsim_tx_frame_nl(hw, skb, _pid);
1550
1551         mac80211_hwsim_tx_frame_no_nl(hw, skb, chan);
1552         dev_kfree_skb(skb);
1553 }
1554
1555 static void mac80211_hwsim_beacon_tx(void *arg, u8 *mac,
1556                                      struct ieee80211_vif *vif)
1557 {
1558         struct mac80211_hwsim_data *data = arg;
1559         struct ieee80211_hw *hw = data->hw;
1560         struct ieee80211_tx_info *info;
1561         struct ieee80211_rate *txrate;
1562         struct ieee80211_mgmt *mgmt;
1563         struct sk_buff *skb;
1564
1565         hwsim_check_magic(vif);
1566
1567         if (vif->type != NL80211_IFTYPE_AP &&
1568             vif->type != NL80211_IFTYPE_MESH_POINT &&
1569             vif->type != NL80211_IFTYPE_ADHOC)
1570                 return;
1571
1572         skb = ieee80211_beacon_get(hw, vif);
1573         if (skb == NULL)
1574                 return;
1575         info = IEEE80211_SKB_CB(skb);
1576         if (ieee80211_hw_check(hw, SUPPORTS_RC_TABLE))
1577                 ieee80211_get_tx_rates(vif, NULL, skb,
1578                                        info->control.rates,
1579                                        ARRAY_SIZE(info->control.rates));
1580
1581         txrate = ieee80211_get_tx_rate(hw, info);
1582
1583         mgmt = (struct ieee80211_mgmt *) skb->data;
1584         /* fake header transmission time */
1585         data->abs_bcn_ts = mac80211_hwsim_get_tsf_raw();
1586         mgmt->u.beacon.timestamp = cpu_to_le64(data->abs_bcn_ts +
1587                                                data->tsf_offset +
1588                                                24 * 8 * 10 / txrate->bitrate);
1589
1590         mac80211_hwsim_tx_frame(hw, skb,
1591                                 rcu_dereference(vif->chanctx_conf)->def.chan);
1592
1593         if (vif->csa_active && ieee80211_csa_is_complete(vif))
1594                 ieee80211_csa_finish(vif);
1595 }
1596
1597 static enum hrtimer_restart
1598 mac80211_hwsim_beacon(struct hrtimer *timer)
1599 {
1600         struct mac80211_hwsim_data *data =
1601                 container_of(timer, struct mac80211_hwsim_data,
1602                              beacon_timer.timer);
1603         struct ieee80211_hw *hw = data->hw;
1604         u64 bcn_int = data->beacon_int;
1605         ktime_t next_bcn;
1606
1607         if (!data->started)
1608                 goto out;
1609
1610         ieee80211_iterate_active_interfaces_atomic(
1611                 hw, IEEE80211_IFACE_ITER_NORMAL,
1612                 mac80211_hwsim_beacon_tx, data);
1613
1614         /* beacon at new TBTT + beacon interval */
1615         if (data->bcn_delta) {
1616                 bcn_int -= data->bcn_delta;
1617                 data->bcn_delta = 0;
1618         }
1619
1620         next_bcn = ktime_add(hrtimer_get_expires(timer),
1621                              ns_to_ktime(bcn_int * 1000));
1622         tasklet_hrtimer_start(&data->beacon_timer, next_bcn, HRTIMER_MODE_ABS);
1623 out:
1624         return HRTIMER_NORESTART;
1625 }
1626
1627 static const char * const hwsim_chanwidths[] = {
1628         [NL80211_CHAN_WIDTH_20_NOHT] = "noht",
1629         [NL80211_CHAN_WIDTH_20] = "ht20",
1630         [NL80211_CHAN_WIDTH_40] = "ht40",
1631         [NL80211_CHAN_WIDTH_80] = "vht80",
1632         [NL80211_CHAN_WIDTH_80P80] = "vht80p80",
1633         [NL80211_CHAN_WIDTH_160] = "vht160",
1634 };
1635
1636 static int mac80211_hwsim_config(struct ieee80211_hw *hw, u32 changed)
1637 {
1638         struct mac80211_hwsim_data *data = hw->priv;
1639         struct ieee80211_conf *conf = &hw->conf;
1640         static const char *smps_modes[IEEE80211_SMPS_NUM_MODES] = {
1641                 [IEEE80211_SMPS_AUTOMATIC] = "auto",
1642                 [IEEE80211_SMPS_OFF] = "off",
1643                 [IEEE80211_SMPS_STATIC] = "static",
1644                 [IEEE80211_SMPS_DYNAMIC] = "dynamic",
1645         };
1646         int idx;
1647
1648         if (conf->chandef.chan)
1649                 wiphy_dbg(hw->wiphy,
1650                           "%s (freq=%d(%d - %d)/%s idle=%d ps=%d smps=%s)\n",
1651                           __func__,
1652                           conf->chandef.chan->center_freq,
1653                           conf->chandef.center_freq1,
1654                           conf->chandef.center_freq2,
1655                           hwsim_chanwidths[conf->chandef.width],
1656                           !!(conf->flags & IEEE80211_CONF_IDLE),
1657                           !!(conf->flags & IEEE80211_CONF_PS),
1658                           smps_modes[conf->smps_mode]);
1659         else
1660                 wiphy_dbg(hw->wiphy,
1661                           "%s (freq=0 idle=%d ps=%d smps=%s)\n",
1662                           __func__,
1663                           !!(conf->flags & IEEE80211_CONF_IDLE),
1664                           !!(conf->flags & IEEE80211_CONF_PS),
1665                           smps_modes[conf->smps_mode]);
1666
1667         data->idle = !!(conf->flags & IEEE80211_CONF_IDLE);
1668
1669         WARN_ON(conf->chandef.chan && data->use_chanctx);
1670
1671         mutex_lock(&data->mutex);
1672         if (data->scanning && conf->chandef.chan) {
1673                 for (idx = 0; idx < ARRAY_SIZE(data->survey_data); idx++) {
1674                         if (data->survey_data[idx].channel == data->channel) {
1675                                 data->survey_data[idx].start =
1676                                         data->survey_data[idx].next_start;
1677                                 data->survey_data[idx].end = jiffies;
1678                                 break;
1679                         }
1680                 }
1681
1682                 data->channel = conf->chandef.chan;
1683
1684                 for (idx = 0; idx < ARRAY_SIZE(data->survey_data); idx++) {
1685                         if (data->survey_data[idx].channel &&
1686                             data->survey_data[idx].channel != data->channel)
1687                                 continue;
1688                         data->survey_data[idx].channel = data->channel;
1689                         data->survey_data[idx].next_start = jiffies;
1690                         break;
1691                 }
1692         } else {
1693                 data->channel = conf->chandef.chan;
1694         }
1695         mutex_unlock(&data->mutex);
1696
1697         if (!data->started || !data->beacon_int)
1698                 tasklet_hrtimer_cancel(&data->beacon_timer);
1699         else if (!hrtimer_is_queued(&data->beacon_timer.timer)) {
1700                 u64 tsf = mac80211_hwsim_get_tsf(hw, NULL);
1701                 u32 bcn_int = data->beacon_int;
1702                 u64 until_tbtt = bcn_int - do_div(tsf, bcn_int);
1703
1704                 tasklet_hrtimer_start(&data->beacon_timer,
1705                                       ns_to_ktime(until_tbtt * 1000),
1706                                       HRTIMER_MODE_REL);
1707         }
1708
1709         return 0;
1710 }
1711
1712
1713 static void mac80211_hwsim_configure_filter(struct ieee80211_hw *hw,
1714                                             unsigned int changed_flags,
1715                                             unsigned int *total_flags,u64 multicast)
1716 {
1717         struct mac80211_hwsim_data *data = hw->priv;
1718
1719         wiphy_dbg(hw->wiphy, "%s\n", __func__);
1720
1721         data->rx_filter = 0;
1722         if (*total_flags & FIF_ALLMULTI)
1723                 data->rx_filter |= FIF_ALLMULTI;
1724
1725         *total_flags = data->rx_filter;
1726 }
1727
1728 static void mac80211_hwsim_bcn_en_iter(void *data, u8 *mac,
1729                                        struct ieee80211_vif *vif)
1730 {
1731         unsigned int *count = data;
1732         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
1733
1734         if (vp->bcn_en)
1735                 (*count)++;
1736 }
1737
1738 static void mac80211_hwsim_bss_info_changed(struct ieee80211_hw *hw,
1739                                             struct ieee80211_vif *vif,
1740                                             struct ieee80211_bss_conf *info,
1741                                             u32 changed)
1742 {
1743         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
1744         struct mac80211_hwsim_data *data = hw->priv;
1745
1746         hwsim_check_magic(vif);
1747
1748         wiphy_dbg(hw->wiphy, "%s(changed=0x%x vif->addr=%pM)\n",
1749                   __func__, changed, vif->addr);
1750
1751         if (changed & BSS_CHANGED_BSSID) {
1752                 wiphy_dbg(hw->wiphy, "%s: BSSID changed: %pM\n",
1753                           __func__, info->bssid);
1754                 memcpy(vp->bssid, info->bssid, ETH_ALEN);
1755         }
1756
1757         if (changed & BSS_CHANGED_ASSOC) {
1758                 wiphy_dbg(hw->wiphy, "  ASSOC: assoc=%d aid=%d\n",
1759                           info->assoc, info->aid);
1760                 vp->assoc = info->assoc;
1761                 vp->aid = info->aid;
1762         }
1763
1764         if (changed & BSS_CHANGED_BEACON_ENABLED) {
1765                 wiphy_dbg(hw->wiphy, "  BCN EN: %d (BI=%u)\n",
1766                           info->enable_beacon, info->beacon_int);
1767                 vp->bcn_en = info->enable_beacon;
1768                 if (data->started &&
1769                     !hrtimer_is_queued(&data->beacon_timer.timer) &&
1770                     info->enable_beacon) {
1771                         u64 tsf, until_tbtt;
1772                         u32 bcn_int;
1773                         data->beacon_int = info->beacon_int * 1024;
1774                         tsf = mac80211_hwsim_get_tsf(hw, vif);
1775                         bcn_int = data->beacon_int;
1776                         until_tbtt = bcn_int - do_div(tsf, bcn_int);
1777                         tasklet_hrtimer_start(&data->beacon_timer,
1778                                               ns_to_ktime(until_tbtt * 1000),
1779                                               HRTIMER_MODE_REL);
1780                 } else if (!info->enable_beacon) {
1781                         unsigned int count = 0;
1782                         ieee80211_iterate_active_interfaces_atomic(
1783                                 data->hw, IEEE80211_IFACE_ITER_NORMAL,
1784                                 mac80211_hwsim_bcn_en_iter, &count);
1785                         wiphy_dbg(hw->wiphy, "  beaconing vifs remaining: %u",
1786                                   count);
1787                         if (count == 0) {
1788                                 tasklet_hrtimer_cancel(&data->beacon_timer);
1789                                 data->beacon_int = 0;
1790                         }
1791                 }
1792         }
1793
1794         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1795                 wiphy_dbg(hw->wiphy, "  ERP_CTS_PROT: %d\n",
1796                           info->use_cts_prot);
1797         }
1798
1799         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1800                 wiphy_dbg(hw->wiphy, "  ERP_PREAMBLE: %d\n",
1801                           info->use_short_preamble);
1802         }
1803
1804         if (changed & BSS_CHANGED_ERP_SLOT) {
1805                 wiphy_dbg(hw->wiphy, "  ERP_SLOT: %d\n", info->use_short_slot);
1806         }
1807
1808         if (changed & BSS_CHANGED_HT) {
1809                 wiphy_dbg(hw->wiphy, "  HT: op_mode=0x%x\n",
1810                           info->ht_operation_mode);
1811         }
1812
1813         if (changed & BSS_CHANGED_BASIC_RATES) {
1814                 wiphy_dbg(hw->wiphy, "  BASIC_RATES: 0x%llx\n",
1815                           (unsigned long long) info->basic_rates);
1816         }
1817
1818         if (changed & BSS_CHANGED_TXPOWER)
1819                 wiphy_dbg(hw->wiphy, "  TX Power: %d dBm\n", info->txpower);
1820 }
1821
1822 static int mac80211_hwsim_sta_add(struct ieee80211_hw *hw,
1823                                   struct ieee80211_vif *vif,
1824                                   struct ieee80211_sta *sta)
1825 {
1826         hwsim_check_magic(vif);
1827         hwsim_set_sta_magic(sta);
1828
1829         return 0;
1830 }
1831
1832 static int mac80211_hwsim_sta_remove(struct ieee80211_hw *hw,
1833                                      struct ieee80211_vif *vif,
1834                                      struct ieee80211_sta *sta)
1835 {
1836         hwsim_check_magic(vif);
1837         hwsim_clear_sta_magic(sta);
1838
1839         return 0;
1840 }
1841
1842 static void mac80211_hwsim_sta_notify(struct ieee80211_hw *hw,
1843                                       struct ieee80211_vif *vif,
1844                                       enum sta_notify_cmd cmd,
1845                                       struct ieee80211_sta *sta)
1846 {
1847         hwsim_check_magic(vif);
1848
1849         switch (cmd) {
1850         case STA_NOTIFY_SLEEP:
1851         case STA_NOTIFY_AWAKE:
1852                 /* TODO: make good use of these flags */
1853                 break;
1854         default:
1855                 WARN(1, "Invalid sta notify: %d\n", cmd);
1856                 break;
1857         }
1858 }
1859
1860 static int mac80211_hwsim_set_tim(struct ieee80211_hw *hw,
1861                                   struct ieee80211_sta *sta,
1862                                   bool set)
1863 {
1864         hwsim_check_sta_magic(sta);
1865         return 0;
1866 }
1867
1868 static int mac80211_hwsim_conf_tx(
1869         struct ieee80211_hw *hw,
1870         struct ieee80211_vif *vif, u16 queue,
1871         const struct ieee80211_tx_queue_params *params)
1872 {
1873         wiphy_dbg(hw->wiphy,
1874                   "%s (queue=%d txop=%d cw_min=%d cw_max=%d aifs=%d)\n",
1875                   __func__, queue,
1876                   params->txop, params->cw_min,
1877                   params->cw_max, params->aifs);
1878         return 0;
1879 }
1880
1881 static int mac80211_hwsim_get_survey(struct ieee80211_hw *hw, int idx,
1882                                      struct survey_info *survey)
1883 {
1884         struct mac80211_hwsim_data *hwsim = hw->priv;
1885
1886         if (idx < 0 || idx >= ARRAY_SIZE(hwsim->survey_data))
1887                 return -ENOENT;
1888
1889         mutex_lock(&hwsim->mutex);
1890         survey->channel = hwsim->survey_data[idx].channel;
1891         if (!survey->channel) {
1892                 mutex_unlock(&hwsim->mutex);
1893                 return -ENOENT;
1894         }
1895
1896         /*
1897          * Magically conjured dummy values --- this is only ok for simulated hardware.
1898          *
1899          * A real driver which cannot determine real values noise MUST NOT
1900          * report any, especially not a magically conjured ones :-)
1901          */
1902         survey->filled = SURVEY_INFO_NOISE_DBM |
1903                          SURVEY_INFO_TIME |
1904                          SURVEY_INFO_TIME_BUSY;
1905         survey->noise = -92;
1906         survey->time =
1907                 jiffies_to_msecs(hwsim->survey_data[idx].end -
1908                                  hwsim->survey_data[idx].start);
1909         /* report 12.5% of channel time is used */
1910         survey->time_busy = survey->time/8;
1911         mutex_unlock(&hwsim->mutex);
1912
1913         return 0;
1914 }
1915
1916 #ifdef CONFIG_NL80211_TESTMODE
1917 /*
1918  * This section contains example code for using netlink
1919  * attributes with the testmode command in nl80211.
1920  */
1921
1922 /* These enums need to be kept in sync with userspace */
1923 enum hwsim_testmode_attr {
1924         __HWSIM_TM_ATTR_INVALID = 0,
1925         HWSIM_TM_ATTR_CMD       = 1,
1926         HWSIM_TM_ATTR_PS        = 2,
1927
1928         /* keep last */
1929         __HWSIM_TM_ATTR_AFTER_LAST,
1930         HWSIM_TM_ATTR_MAX       = __HWSIM_TM_ATTR_AFTER_LAST - 1
1931 };
1932
1933 enum hwsim_testmode_cmd {
1934         HWSIM_TM_CMD_SET_PS             = 0,
1935         HWSIM_TM_CMD_GET_PS             = 1,
1936         HWSIM_TM_CMD_STOP_QUEUES        = 2,
1937         HWSIM_TM_CMD_WAKE_QUEUES        = 3,
1938 };
1939
1940 static const struct nla_policy hwsim_testmode_policy[HWSIM_TM_ATTR_MAX + 1] = {
1941         [HWSIM_TM_ATTR_CMD] = { .type = NLA_U32 },
1942         [HWSIM_TM_ATTR_PS] = { .type = NLA_U32 },
1943 };
1944
1945 static int mac80211_hwsim_testmode_cmd(struct ieee80211_hw *hw,
1946                                        struct ieee80211_vif *vif,
1947                                        void *data, int len)
1948 {
1949         struct mac80211_hwsim_data *hwsim = hw->priv;
1950         struct nlattr *tb[HWSIM_TM_ATTR_MAX + 1];
1951         struct sk_buff *skb;
1952         int err, ps;
1953
1954         err = nla_parse(tb, HWSIM_TM_ATTR_MAX, data, len,
1955                         hwsim_testmode_policy, NULL);
1956         if (err)
1957                 return err;
1958
1959         if (!tb[HWSIM_TM_ATTR_CMD])
1960                 return -EINVAL;
1961
1962         switch (nla_get_u32(tb[HWSIM_TM_ATTR_CMD])) {
1963         case HWSIM_TM_CMD_SET_PS:
1964                 if (!tb[HWSIM_TM_ATTR_PS])
1965                         return -EINVAL;
1966                 ps = nla_get_u32(tb[HWSIM_TM_ATTR_PS]);
1967                 return hwsim_fops_ps_write(hwsim, ps);
1968         case HWSIM_TM_CMD_GET_PS:
1969                 skb = cfg80211_testmode_alloc_reply_skb(hw->wiphy,
1970                                                 nla_total_size(sizeof(u32)));
1971                 if (!skb)
1972                         return -ENOMEM;
1973                 if (nla_put_u32(skb, HWSIM_TM_ATTR_PS, hwsim->ps))
1974                         goto nla_put_failure;
1975                 return cfg80211_testmode_reply(skb);
1976         case HWSIM_TM_CMD_STOP_QUEUES:
1977                 ieee80211_stop_queues(hw);
1978                 return 0;
1979         case HWSIM_TM_CMD_WAKE_QUEUES:
1980                 ieee80211_wake_queues(hw);
1981                 return 0;
1982         default:
1983                 return -EOPNOTSUPP;
1984         }
1985
1986  nla_put_failure:
1987         kfree_skb(skb);
1988         return -ENOBUFS;
1989 }
1990 #endif
1991
1992 static int mac80211_hwsim_ampdu_action(struct ieee80211_hw *hw,
1993                                        struct ieee80211_vif *vif,
1994                                        struct ieee80211_ampdu_params *params)
1995 {
1996         struct ieee80211_sta *sta = params->sta;
1997         enum ieee80211_ampdu_mlme_action action = params->action;
1998         u16 tid = params->tid;
1999
2000         switch (action) {
2001         case IEEE80211_AMPDU_TX_START:
2002                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2003                 break;
2004         case IEEE80211_AMPDU_TX_STOP_CONT:
2005         case IEEE80211_AMPDU_TX_STOP_FLUSH:
2006         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
2007                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2008                 break;
2009         case IEEE80211_AMPDU_TX_OPERATIONAL:
2010                 break;
2011         case IEEE80211_AMPDU_RX_START:
2012         case IEEE80211_AMPDU_RX_STOP:
2013                 break;
2014         default:
2015                 return -EOPNOTSUPP;
2016         }
2017
2018         return 0;
2019 }
2020
2021 static void mac80211_hwsim_flush(struct ieee80211_hw *hw,
2022                                  struct ieee80211_vif *vif,
2023                                  u32 queues, bool drop)
2024 {
2025         /* Not implemented, queues only on kernel side */
2026 }
2027
2028 static void hw_scan_work(struct work_struct *work)
2029 {
2030         struct mac80211_hwsim_data *hwsim =
2031                 container_of(work, struct mac80211_hwsim_data, hw_scan.work);
2032         struct cfg80211_scan_request *req = hwsim->hw_scan_request;
2033         int dwell, i;
2034
2035         mutex_lock(&hwsim->mutex);
2036         if (hwsim->scan_chan_idx >= req->n_channels) {
2037                 struct cfg80211_scan_info info = {
2038                         .aborted = false,
2039                 };
2040
2041                 wiphy_dbg(hwsim->hw->wiphy, "hw scan complete\n");
2042                 ieee80211_scan_completed(hwsim->hw, &info);
2043                 hwsim->hw_scan_request = NULL;
2044                 hwsim->hw_scan_vif = NULL;
2045                 hwsim->tmp_chan = NULL;
2046                 mutex_unlock(&hwsim->mutex);
2047                 return;
2048         }
2049
2050         wiphy_dbg(hwsim->hw->wiphy, "hw scan %d MHz\n",
2051                   req->channels[hwsim->scan_chan_idx]->center_freq);
2052
2053         hwsim->tmp_chan = req->channels[hwsim->scan_chan_idx];
2054         if (hwsim->tmp_chan->flags & (IEEE80211_CHAN_NO_IR |
2055                                       IEEE80211_CHAN_RADAR) ||
2056             !req->n_ssids) {
2057                 dwell = 120;
2058         } else {
2059                 dwell = 30;
2060                 /* send probes */
2061                 for (i = 0; i < req->n_ssids; i++) {
2062                         struct sk_buff *probe;
2063                         struct ieee80211_mgmt *mgmt;
2064
2065                         probe = ieee80211_probereq_get(hwsim->hw,
2066                                                        hwsim->scan_addr,
2067                                                        req->ssids[i].ssid,
2068                                                        req->ssids[i].ssid_len,
2069                                                        req->ie_len);
2070                         if (!probe)
2071                                 continue;
2072
2073                         mgmt = (struct ieee80211_mgmt *) probe->data;
2074                         memcpy(mgmt->da, req->bssid, ETH_ALEN);
2075                         memcpy(mgmt->bssid, req->bssid, ETH_ALEN);
2076
2077                         if (req->ie_len)
2078                                 skb_put_data(probe, req->ie, req->ie_len);
2079
2080                         local_bh_disable();
2081                         mac80211_hwsim_tx_frame(hwsim->hw, probe,
2082                                                 hwsim->tmp_chan);
2083                         local_bh_enable();
2084                 }
2085         }
2086         ieee80211_queue_delayed_work(hwsim->hw, &hwsim->hw_scan,
2087                                      msecs_to_jiffies(dwell));
2088         hwsim->survey_data[hwsim->scan_chan_idx].channel = hwsim->tmp_chan;
2089         hwsim->survey_data[hwsim->scan_chan_idx].start = jiffies;
2090         hwsim->survey_data[hwsim->scan_chan_idx].end =
2091                 jiffies + msecs_to_jiffies(dwell);
2092         hwsim->scan_chan_idx++;
2093         mutex_unlock(&hwsim->mutex);
2094 }
2095
2096 static int mac80211_hwsim_hw_scan(struct ieee80211_hw *hw,
2097                                   struct ieee80211_vif *vif,
2098                                   struct ieee80211_scan_request *hw_req)
2099 {
2100         struct mac80211_hwsim_data *hwsim = hw->priv;
2101         struct cfg80211_scan_request *req = &hw_req->req;
2102
2103         mutex_lock(&hwsim->mutex);
2104         if (WARN_ON(hwsim->tmp_chan || hwsim->hw_scan_request)) {
2105                 mutex_unlock(&hwsim->mutex);
2106                 return -EBUSY;
2107         }
2108         hwsim->hw_scan_request = req;
2109         hwsim->hw_scan_vif = vif;
2110         hwsim->scan_chan_idx = 0;
2111         if (req->flags & NL80211_SCAN_FLAG_RANDOM_ADDR)
2112                 get_random_mask_addr(hwsim->scan_addr,
2113                                      hw_req->req.mac_addr,
2114                                      hw_req->req.mac_addr_mask);
2115         else
2116                 memcpy(hwsim->scan_addr, vif->addr, ETH_ALEN);
2117         memset(hwsim->survey_data, 0, sizeof(hwsim->survey_data));
2118         mutex_unlock(&hwsim->mutex);
2119
2120         wiphy_dbg(hw->wiphy, "hwsim hw_scan request\n");
2121
2122         ieee80211_queue_delayed_work(hwsim->hw, &hwsim->hw_scan, 0);
2123
2124         return 0;
2125 }
2126
2127 static void mac80211_hwsim_cancel_hw_scan(struct ieee80211_hw *hw,
2128                                           struct ieee80211_vif *vif)
2129 {
2130         struct mac80211_hwsim_data *hwsim = hw->priv;
2131         struct cfg80211_scan_info info = {
2132                 .aborted = true,
2133         };
2134
2135         wiphy_dbg(hw->wiphy, "hwsim cancel_hw_scan\n");
2136
2137         cancel_delayed_work_sync(&hwsim->hw_scan);
2138
2139         mutex_lock(&hwsim->mutex);
2140         ieee80211_scan_completed(hwsim->hw, &info);
2141         hwsim->tmp_chan = NULL;
2142         hwsim->hw_scan_request = NULL;
2143         hwsim->hw_scan_vif = NULL;
2144         mutex_unlock(&hwsim->mutex);
2145 }
2146
2147 static void mac80211_hwsim_sw_scan(struct ieee80211_hw *hw,
2148                                    struct ieee80211_vif *vif,
2149                                    const u8 *mac_addr)
2150 {
2151         struct mac80211_hwsim_data *hwsim = hw->priv;
2152
2153         mutex_lock(&hwsim->mutex);
2154
2155         if (hwsim->scanning) {
2156                 pr_debug("two hwsim sw_scans detected!\n");
2157                 goto out;
2158         }
2159
2160         pr_debug("hwsim sw_scan request, prepping stuff\n");
2161
2162         memcpy(hwsim->scan_addr, mac_addr, ETH_ALEN);
2163         hwsim->scanning = true;
2164         memset(hwsim->survey_data, 0, sizeof(hwsim->survey_data));
2165
2166 out:
2167         mutex_unlock(&hwsim->mutex);
2168 }
2169
2170 static void mac80211_hwsim_sw_scan_complete(struct ieee80211_hw *hw,
2171                                             struct ieee80211_vif *vif)
2172 {
2173         struct mac80211_hwsim_data *hwsim = hw->priv;
2174
2175         mutex_lock(&hwsim->mutex);
2176
2177         pr_debug("hwsim sw_scan_complete\n");
2178         hwsim->scanning = false;
2179         eth_zero_addr(hwsim->scan_addr);
2180
2181         mutex_unlock(&hwsim->mutex);
2182 }
2183
2184 static void hw_roc_start(struct work_struct *work)
2185 {
2186         struct mac80211_hwsim_data *hwsim =
2187                 container_of(work, struct mac80211_hwsim_data, roc_start.work);
2188
2189         mutex_lock(&hwsim->mutex);
2190
2191         wiphy_dbg(hwsim->hw->wiphy, "hwsim ROC begins\n");
2192         hwsim->tmp_chan = hwsim->roc_chan;
2193         ieee80211_ready_on_channel(hwsim->hw);
2194
2195         ieee80211_queue_delayed_work(hwsim->hw, &hwsim->roc_done,
2196                                      msecs_to_jiffies(hwsim->roc_duration));
2197
2198         mutex_unlock(&hwsim->mutex);
2199 }
2200
2201 static void hw_roc_done(struct work_struct *work)
2202 {
2203         struct mac80211_hwsim_data *hwsim =
2204                 container_of(work, struct mac80211_hwsim_data, roc_done.work);
2205
2206         mutex_lock(&hwsim->mutex);
2207         ieee80211_remain_on_channel_expired(hwsim->hw);
2208         hwsim->tmp_chan = NULL;
2209         mutex_unlock(&hwsim->mutex);
2210
2211         wiphy_dbg(hwsim->hw->wiphy, "hwsim ROC expired\n");
2212 }
2213
2214 static int mac80211_hwsim_roc(struct ieee80211_hw *hw,
2215                               struct ieee80211_vif *vif,
2216                               struct ieee80211_channel *chan,
2217                               int duration,
2218                               enum ieee80211_roc_type type)
2219 {
2220         struct mac80211_hwsim_data *hwsim = hw->priv;
2221
2222         mutex_lock(&hwsim->mutex);
2223         if (WARN_ON(hwsim->tmp_chan || hwsim->hw_scan_request)) {
2224                 mutex_unlock(&hwsim->mutex);
2225                 return -EBUSY;
2226         }
2227
2228         hwsim->roc_chan = chan;
2229         hwsim->roc_duration = duration;
2230         mutex_unlock(&hwsim->mutex);
2231
2232         wiphy_dbg(hw->wiphy, "hwsim ROC (%d MHz, %d ms)\n",
2233                   chan->center_freq, duration);
2234         ieee80211_queue_delayed_work(hw, &hwsim->roc_start, HZ/50);
2235
2236         return 0;
2237 }
2238
2239 static int mac80211_hwsim_croc(struct ieee80211_hw *hw)
2240 {
2241         struct mac80211_hwsim_data *hwsim = hw->priv;
2242
2243         cancel_delayed_work_sync(&hwsim->roc_start);
2244         cancel_delayed_work_sync(&hwsim->roc_done);
2245
2246         mutex_lock(&hwsim->mutex);
2247         hwsim->tmp_chan = NULL;
2248         mutex_unlock(&hwsim->mutex);
2249
2250         wiphy_dbg(hw->wiphy, "hwsim ROC canceled\n");
2251
2252         return 0;
2253 }
2254
2255 static int mac80211_hwsim_add_chanctx(struct ieee80211_hw *hw,
2256                                       struct ieee80211_chanctx_conf *ctx)
2257 {
2258         hwsim_set_chanctx_magic(ctx);
2259         wiphy_dbg(hw->wiphy,
2260                   "add channel context control: %d MHz/width: %d/cfreqs:%d/%d MHz\n",
2261                   ctx->def.chan->center_freq, ctx->def.width,
2262                   ctx->def.center_freq1, ctx->def.center_freq2);
2263         return 0;
2264 }
2265
2266 static void mac80211_hwsim_remove_chanctx(struct ieee80211_hw *hw,
2267                                           struct ieee80211_chanctx_conf *ctx)
2268 {
2269         wiphy_dbg(hw->wiphy,
2270                   "remove channel context control: %d MHz/width: %d/cfreqs:%d/%d MHz\n",
2271                   ctx->def.chan->center_freq, ctx->def.width,
2272                   ctx->def.center_freq1, ctx->def.center_freq2);
2273         hwsim_check_chanctx_magic(ctx);
2274         hwsim_clear_chanctx_magic(ctx);
2275 }
2276
2277 static void mac80211_hwsim_change_chanctx(struct ieee80211_hw *hw,
2278                                           struct ieee80211_chanctx_conf *ctx,
2279                                           u32 changed)
2280 {
2281         hwsim_check_chanctx_magic(ctx);
2282         wiphy_dbg(hw->wiphy,
2283                   "change channel context control: %d MHz/width: %d/cfreqs:%d/%d MHz\n",
2284                   ctx->def.chan->center_freq, ctx->def.width,
2285                   ctx->def.center_freq1, ctx->def.center_freq2);
2286 }
2287
2288 static int mac80211_hwsim_assign_vif_chanctx(struct ieee80211_hw *hw,
2289                                              struct ieee80211_vif *vif,
2290                                              struct ieee80211_chanctx_conf *ctx)
2291 {
2292         hwsim_check_magic(vif);
2293         hwsim_check_chanctx_magic(ctx);
2294
2295         return 0;
2296 }
2297
2298 static void mac80211_hwsim_unassign_vif_chanctx(struct ieee80211_hw *hw,
2299                                                 struct ieee80211_vif *vif,
2300                                                 struct ieee80211_chanctx_conf *ctx)
2301 {
2302         hwsim_check_magic(vif);
2303         hwsim_check_chanctx_magic(ctx);
2304 }
2305
2306 static const char mac80211_hwsim_gstrings_stats[][ETH_GSTRING_LEN] = {
2307         "tx_pkts_nic",
2308         "tx_bytes_nic",
2309         "rx_pkts_nic",
2310         "rx_bytes_nic",
2311         "d_tx_dropped",
2312         "d_tx_failed",
2313         "d_ps_mode",
2314         "d_group",
2315 };
2316
2317 #define MAC80211_HWSIM_SSTATS_LEN ARRAY_SIZE(mac80211_hwsim_gstrings_stats)
2318
2319 static void mac80211_hwsim_get_et_strings(struct ieee80211_hw *hw,
2320                                           struct ieee80211_vif *vif,
2321                                           u32 sset, u8 *data)
2322 {
2323         if (sset == ETH_SS_STATS)
2324                 memcpy(data, *mac80211_hwsim_gstrings_stats,
2325                        sizeof(mac80211_hwsim_gstrings_stats));
2326 }
2327
2328 static int mac80211_hwsim_get_et_sset_count(struct ieee80211_hw *hw,
2329                                             struct ieee80211_vif *vif, int sset)
2330 {
2331         if (sset == ETH_SS_STATS)
2332                 return MAC80211_HWSIM_SSTATS_LEN;
2333         return 0;
2334 }
2335
2336 static void mac80211_hwsim_get_et_stats(struct ieee80211_hw *hw,
2337                                         struct ieee80211_vif *vif,
2338                                         struct ethtool_stats *stats, u64 *data)
2339 {
2340         struct mac80211_hwsim_data *ar = hw->priv;
2341         int i = 0;
2342
2343         data[i++] = ar->tx_pkts;
2344         data[i++] = ar->tx_bytes;
2345         data[i++] = ar->rx_pkts;
2346         data[i++] = ar->rx_bytes;
2347         data[i++] = ar->tx_dropped;
2348         data[i++] = ar->tx_failed;
2349         data[i++] = ar->ps;
2350         data[i++] = ar->group;
2351
2352         WARN_ON(i != MAC80211_HWSIM_SSTATS_LEN);
2353 }
2354
2355 #define HWSIM_COMMON_OPS                                        \
2356         .tx = mac80211_hwsim_tx,                                \
2357         .start = mac80211_hwsim_start,                          \
2358         .stop = mac80211_hwsim_stop,                            \
2359         .add_interface = mac80211_hwsim_add_interface,          \
2360         .change_interface = mac80211_hwsim_change_interface,    \
2361         .remove_interface = mac80211_hwsim_remove_interface,    \
2362         .config = mac80211_hwsim_config,                        \
2363         .configure_filter = mac80211_hwsim_configure_filter,    \
2364         .bss_info_changed = mac80211_hwsim_bss_info_changed,    \
2365         .sta_add = mac80211_hwsim_sta_add,                      \
2366         .sta_remove = mac80211_hwsim_sta_remove,                \
2367         .sta_notify = mac80211_hwsim_sta_notify,                \
2368         .set_tim = mac80211_hwsim_set_tim,                      \
2369         .conf_tx = mac80211_hwsim_conf_tx,                      \
2370         .get_survey = mac80211_hwsim_get_survey,                \
2371         CFG80211_TESTMODE_CMD(mac80211_hwsim_testmode_cmd)      \
2372         .ampdu_action = mac80211_hwsim_ampdu_action,            \
2373         .flush = mac80211_hwsim_flush,                          \
2374         .get_tsf = mac80211_hwsim_get_tsf,                      \
2375         .set_tsf = mac80211_hwsim_set_tsf,                      \
2376         .get_et_sset_count = mac80211_hwsim_get_et_sset_count,  \
2377         .get_et_stats = mac80211_hwsim_get_et_stats,            \
2378         .get_et_strings = mac80211_hwsim_get_et_strings,
2379
2380 static const struct ieee80211_ops mac80211_hwsim_ops = {
2381         HWSIM_COMMON_OPS
2382         .sw_scan_start = mac80211_hwsim_sw_scan,
2383         .sw_scan_complete = mac80211_hwsim_sw_scan_complete,
2384 };
2385
2386 static const struct ieee80211_ops mac80211_hwsim_mchan_ops = {
2387         HWSIM_COMMON_OPS
2388         .hw_scan = mac80211_hwsim_hw_scan,
2389         .cancel_hw_scan = mac80211_hwsim_cancel_hw_scan,
2390         .sw_scan_start = NULL,
2391         .sw_scan_complete = NULL,
2392         .remain_on_channel = mac80211_hwsim_roc,
2393         .cancel_remain_on_channel = mac80211_hwsim_croc,
2394         .add_chanctx = mac80211_hwsim_add_chanctx,
2395         .remove_chanctx = mac80211_hwsim_remove_chanctx,
2396         .change_chanctx = mac80211_hwsim_change_chanctx,
2397         .assign_vif_chanctx = mac80211_hwsim_assign_vif_chanctx,
2398         .unassign_vif_chanctx = mac80211_hwsim_unassign_vif_chanctx,
2399 };
2400
2401 struct hwsim_new_radio_params {
2402         unsigned int channels;
2403         const char *reg_alpha2;
2404         const struct ieee80211_regdomain *regd;
2405         bool reg_strict;
2406         bool p2p_device;
2407         bool use_chanctx;
2408         bool destroy_on_close;
2409         const char *hwname;
2410         bool no_vif;
2411 };
2412
2413 static void hwsim_mcast_config_msg(struct sk_buff *mcast_skb,
2414                                    struct genl_info *info)
2415 {
2416         if (info)
2417                 genl_notify(&hwsim_genl_family, mcast_skb, info,
2418                             HWSIM_MCGRP_CONFIG, GFP_KERNEL);
2419         else
2420                 genlmsg_multicast(&hwsim_genl_family, mcast_skb, 0,
2421                                   HWSIM_MCGRP_CONFIG, GFP_KERNEL);
2422 }
2423
2424 static int append_radio_msg(struct sk_buff *skb, int id,
2425                             struct hwsim_new_radio_params *param)
2426 {
2427         int ret;
2428
2429         ret = nla_put_u32(skb, HWSIM_ATTR_RADIO_ID, id);
2430         if (ret < 0)
2431                 return ret;
2432
2433         if (param->channels) {
2434                 ret = nla_put_u32(skb, HWSIM_ATTR_CHANNELS, param->channels);
2435                 if (ret < 0)
2436                         return ret;
2437         }
2438
2439         if (param->reg_alpha2) {
2440                 ret = nla_put(skb, HWSIM_ATTR_REG_HINT_ALPHA2, 2,
2441                               param->reg_alpha2);
2442                 if (ret < 0)
2443                         return ret;
2444         }
2445
2446         if (param->regd) {
2447                 int i;
2448
2449                 for (i = 0; i < ARRAY_SIZE(hwsim_world_regdom_custom); i++) {
2450                         if (hwsim_world_regdom_custom[i] != param->regd)
2451                                 continue;
2452
2453                         ret = nla_put_u32(skb, HWSIM_ATTR_REG_CUSTOM_REG, i);
2454                         if (ret < 0)
2455                                 return ret;
2456                         break;
2457                 }
2458         }
2459
2460         if (param->reg_strict) {
2461                 ret = nla_put_flag(skb, HWSIM_ATTR_REG_STRICT_REG);
2462                 if (ret < 0)
2463                         return ret;
2464         }
2465
2466         if (param->p2p_device) {
2467                 ret = nla_put_flag(skb, HWSIM_ATTR_SUPPORT_P2P_DEVICE);
2468                 if (ret < 0)
2469                         return ret;
2470         }
2471
2472         if (param->use_chanctx) {
2473                 ret = nla_put_flag(skb, HWSIM_ATTR_USE_CHANCTX);
2474                 if (ret < 0)
2475                         return ret;
2476         }
2477
2478         if (param->hwname) {
2479                 ret = nla_put(skb, HWSIM_ATTR_RADIO_NAME,
2480                               strlen(param->hwname), param->hwname);
2481                 if (ret < 0)
2482                         return ret;
2483         }
2484
2485         return 0;
2486 }
2487
2488 static void hwsim_mcast_new_radio(int id, struct genl_info *info,
2489                                   struct hwsim_new_radio_params *param)
2490 {
2491         struct sk_buff *mcast_skb;
2492         void *data;
2493
2494         mcast_skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2495         if (!mcast_skb)
2496                 return;
2497
2498         data = genlmsg_put(mcast_skb, 0, 0, &hwsim_genl_family, 0,
2499                            HWSIM_CMD_NEW_RADIO);
2500         if (!data)
2501                 goto out_err;
2502
2503         if (append_radio_msg(mcast_skb, id, param) < 0)
2504                 goto out_err;
2505
2506         genlmsg_end(mcast_skb, data);
2507
2508         hwsim_mcast_config_msg(mcast_skb, info);
2509         return;
2510
2511 out_err:
2512         genlmsg_cancel(mcast_skb, data);
2513         nlmsg_free(mcast_skb);
2514 }
2515
2516 static int mac80211_hwsim_new_radio(struct genl_info *info,
2517                                     struct hwsim_new_radio_params *param)
2518 {
2519         int err;
2520         u8 addr[ETH_ALEN];
2521         struct mac80211_hwsim_data *data;
2522         struct ieee80211_hw *hw;
2523         enum nl80211_band band;
2524         const struct ieee80211_ops *ops = &mac80211_hwsim_ops;
2525         struct net *net;
2526         int idx;
2527
2528         if (WARN_ON(param->channels > 1 && !param->use_chanctx))
2529                 return -EINVAL;
2530
2531         spin_lock_bh(&hwsim_radio_lock);
2532         idx = hwsim_radio_idx++;
2533         spin_unlock_bh(&hwsim_radio_lock);
2534
2535         if (param->use_chanctx)
2536                 ops = &mac80211_hwsim_mchan_ops;
2537         hw = ieee80211_alloc_hw_nm(sizeof(*data), ops, param->hwname);
2538         if (!hw) {
2539                 pr_debug("mac80211_hwsim: ieee80211_alloc_hw failed\n");
2540                 err = -ENOMEM;
2541                 goto failed;
2542         }
2543
2544         /* ieee80211_alloc_hw_nm may have used a default name */
2545         param->hwname = wiphy_name(hw->wiphy);
2546
2547         if (info)
2548                 net = genl_info_net(info);
2549         else
2550                 net = &init_net;
2551         wiphy_net_set(hw->wiphy, net);
2552
2553         data = hw->priv;
2554         data->hw = hw;
2555
2556         data->dev = device_create(hwsim_class, NULL, 0, hw, "hwsim%d", idx);
2557         if (IS_ERR(data->dev)) {
2558                 printk(KERN_DEBUG
2559                        "mac80211_hwsim: device_create failed (%ld)\n",
2560                        PTR_ERR(data->dev));
2561                 err = -ENOMEM;
2562                 goto failed_drvdata;
2563         }
2564         data->dev->driver = &mac80211_hwsim_driver.driver;
2565         err = device_bind_driver(data->dev);
2566         if (err != 0) {
2567                 pr_debug("mac80211_hwsim: device_bind_driver failed (%d)\n",
2568                        err);
2569                 goto failed_bind;
2570         }
2571
2572         skb_queue_head_init(&data->pending);
2573
2574         SET_IEEE80211_DEV(hw, data->dev);
2575         eth_zero_addr(addr);
2576         addr[0] = 0x02;
2577         addr[3] = idx >> 8;
2578         addr[4] = idx;
2579         memcpy(data->addresses[0].addr, addr, ETH_ALEN);
2580         memcpy(data->addresses[1].addr, addr, ETH_ALEN);
2581         data->addresses[1].addr[0] |= 0x40;
2582         hw->wiphy->n_addresses = 2;
2583         hw->wiphy->addresses = data->addresses;
2584
2585         data->channels = param->channels;
2586         data->use_chanctx = param->use_chanctx;
2587         data->idx = idx;
2588         data->destroy_on_close = param->destroy_on_close;
2589         if (info)
2590                 data->portid = info->snd_portid;
2591
2592         if (data->use_chanctx) {
2593                 hw->wiphy->max_scan_ssids = 255;
2594                 hw->wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
2595                 hw->wiphy->max_remain_on_channel_duration = 1000;
2596                 hw->wiphy->iface_combinations = &data->if_combination;
2597                 if (param->p2p_device)
2598                         data->if_combination = hwsim_if_comb_p2p_dev[0];
2599                 else
2600                         data->if_combination = hwsim_if_comb[0];
2601                 hw->wiphy->n_iface_combinations = 1;
2602                 /* For channels > 1 DFS is not allowed */
2603                 data->if_combination.radar_detect_widths = 0;
2604                 data->if_combination.num_different_channels = data->channels;
2605         } else if (param->p2p_device) {
2606                 hw->wiphy->iface_combinations = hwsim_if_comb_p2p_dev;
2607                 hw->wiphy->n_iface_combinations =
2608                         ARRAY_SIZE(hwsim_if_comb_p2p_dev);
2609         } else {
2610                 hw->wiphy->iface_combinations = hwsim_if_comb;
2611                 hw->wiphy->n_iface_combinations = ARRAY_SIZE(hwsim_if_comb);
2612         }
2613
2614         INIT_DELAYED_WORK(&data->roc_start, hw_roc_start);
2615         INIT_DELAYED_WORK(&data->roc_done, hw_roc_done);
2616         INIT_DELAYED_WORK(&data->hw_scan, hw_scan_work);
2617
2618         hw->queues = 5;
2619         hw->offchannel_tx_hw_queue = 4;
2620         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
2621                                      BIT(NL80211_IFTYPE_AP) |
2622                                      BIT(NL80211_IFTYPE_P2P_CLIENT) |
2623                                      BIT(NL80211_IFTYPE_P2P_GO) |
2624                                      BIT(NL80211_IFTYPE_ADHOC) |
2625                                      BIT(NL80211_IFTYPE_MESH_POINT);
2626
2627         if (param->p2p_device)
2628                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_P2P_DEVICE);
2629
2630         ieee80211_hw_set(hw, SUPPORT_FAST_XMIT);
2631         ieee80211_hw_set(hw, CHANCTX_STA_CSA);
2632         ieee80211_hw_set(hw, SUPPORTS_HT_CCK_RATES);
2633         ieee80211_hw_set(hw, QUEUE_CONTROL);
2634         ieee80211_hw_set(hw, WANT_MONITOR_VIF);
2635         ieee80211_hw_set(hw, AMPDU_AGGREGATION);
2636         ieee80211_hw_set(hw, MFP_CAPABLE);
2637         ieee80211_hw_set(hw, SIGNAL_DBM);
2638         ieee80211_hw_set(hw, TDLS_WIDER_BW);
2639         if (rctbl)
2640                 ieee80211_hw_set(hw, SUPPORTS_RC_TABLE);
2641
2642         hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS |
2643                             WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL |
2644                             WIPHY_FLAG_AP_UAPSD |
2645                             WIPHY_FLAG_HAS_CHANNEL_SWITCH;
2646         hw->wiphy->features |= NL80211_FEATURE_ACTIVE_MONITOR |
2647                                NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE |
2648                                NL80211_FEATURE_STATIC_SMPS |
2649                                NL80211_FEATURE_DYNAMIC_SMPS |
2650                                NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR;
2651         wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_VHT_IBSS);
2652
2653         /* ask mac80211 to reserve space for magic */
2654         hw->vif_data_size = sizeof(struct hwsim_vif_priv);
2655         hw->sta_data_size = sizeof(struct hwsim_sta_priv);
2656         hw->chanctx_data_size = sizeof(struct hwsim_chanctx_priv);
2657
2658         memcpy(data->channels_2ghz, hwsim_channels_2ghz,
2659                 sizeof(hwsim_channels_2ghz));
2660         memcpy(data->channels_5ghz, hwsim_channels_5ghz,
2661                 sizeof(hwsim_channels_5ghz));
2662         memcpy(data->rates, hwsim_rates, sizeof(hwsim_rates));
2663
2664         for (band = NL80211_BAND_2GHZ; band < NUM_NL80211_BANDS; band++) {
2665                 struct ieee80211_supported_band *sband = &data->bands[band];
2666                 switch (band) {
2667                 case NL80211_BAND_2GHZ:
2668                         sband->channels = data->channels_2ghz;
2669                         sband->n_channels = ARRAY_SIZE(hwsim_channels_2ghz);
2670                         sband->bitrates = data->rates;
2671                         sband->n_bitrates = ARRAY_SIZE(hwsim_rates);
2672                         break;
2673                 case NL80211_BAND_5GHZ:
2674                         sband->channels = data->channels_5ghz;
2675                         sband->n_channels = ARRAY_SIZE(hwsim_channels_5ghz);
2676                         sband->bitrates = data->rates + 4;
2677                         sband->n_bitrates = ARRAY_SIZE(hwsim_rates) - 4;
2678
2679                         sband->vht_cap.vht_supported = true;
2680                         sband->vht_cap.cap =
2681                                 IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454 |
2682                                 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ |
2683                                 IEEE80211_VHT_CAP_RXLDPC |
2684                                 IEEE80211_VHT_CAP_SHORT_GI_80 |
2685                                 IEEE80211_VHT_CAP_SHORT_GI_160 |
2686                                 IEEE80211_VHT_CAP_TXSTBC |
2687                                 IEEE80211_VHT_CAP_RXSTBC_1 |
2688                                 IEEE80211_VHT_CAP_RXSTBC_2 |
2689                                 IEEE80211_VHT_CAP_RXSTBC_3 |
2690                                 IEEE80211_VHT_CAP_RXSTBC_4 |
2691                                 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
2692                         sband->vht_cap.vht_mcs.rx_mcs_map =
2693                                 cpu_to_le16(IEEE80211_VHT_MCS_SUPPORT_0_9 << 0 |
2694                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 2 |
2695                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 4 |
2696                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 6 |
2697                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 8 |
2698                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 10 |
2699                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 12 |
2700                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 14);
2701                         sband->vht_cap.vht_mcs.tx_mcs_map =
2702                                 sband->vht_cap.vht_mcs.rx_mcs_map;
2703                         break;
2704                 default:
2705                         continue;
2706                 }
2707
2708                 sband->ht_cap.ht_supported = true;
2709                 sband->ht_cap.cap = IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
2710                                     IEEE80211_HT_CAP_GRN_FLD |
2711                                     IEEE80211_HT_CAP_SGI_20 |
2712                                     IEEE80211_HT_CAP_SGI_40 |
2713                                     IEEE80211_HT_CAP_DSSSCCK40;
2714                 sband->ht_cap.ampdu_factor = 0x3;
2715                 sband->ht_cap.ampdu_density = 0x6;
2716                 memset(&sband->ht_cap.mcs, 0,
2717                        sizeof(sband->ht_cap.mcs));
2718                 sband->ht_cap.mcs.rx_mask[0] = 0xff;
2719                 sband->ht_cap.mcs.rx_mask[1] = 0xff;
2720                 sband->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
2721
2722                 hw->wiphy->bands[band] = sband;
2723         }
2724
2725         /* By default all radios belong to the first group */
2726         data->group = 1;
2727         mutex_init(&data->mutex);
2728
2729         data->netgroup = hwsim_net_get_netgroup(net);
2730
2731         /* Enable frame retransmissions for lossy channels */
2732         hw->max_rates = 4;
2733         hw->max_rate_tries = 11;
2734
2735         hw->wiphy->vendor_commands = mac80211_hwsim_vendor_commands;
2736         hw->wiphy->n_vendor_commands =
2737                 ARRAY_SIZE(mac80211_hwsim_vendor_commands);
2738         hw->wiphy->vendor_events = mac80211_hwsim_vendor_events;
2739         hw->wiphy->n_vendor_events = ARRAY_SIZE(mac80211_hwsim_vendor_events);
2740
2741         if (param->reg_strict)
2742                 hw->wiphy->regulatory_flags |= REGULATORY_STRICT_REG;
2743         if (param->regd) {
2744                 data->regd = param->regd;
2745                 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG;
2746                 wiphy_apply_custom_regulatory(hw->wiphy, param->regd);
2747                 /* give the regulatory workqueue a chance to run */
2748                 schedule_timeout_interruptible(1);
2749         }
2750
2751         if (param->no_vif)
2752                 ieee80211_hw_set(hw, NO_AUTO_VIF);
2753
2754         wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
2755
2756         err = ieee80211_register_hw(hw);
2757         if (err < 0) {
2758                 pr_debug("mac80211_hwsim: ieee80211_register_hw failed (%d)\n",
2759                        err);
2760                 goto failed_hw;
2761         }
2762
2763         wiphy_dbg(hw->wiphy, "hwaddr %pM registered\n", hw->wiphy->perm_addr);
2764
2765         if (param->reg_alpha2) {
2766                 data->alpha2[0] = param->reg_alpha2[0];
2767                 data->alpha2[1] = param->reg_alpha2[1];
2768                 regulatory_hint(hw->wiphy, param->reg_alpha2);
2769         }
2770
2771         data->debugfs = debugfs_create_dir("hwsim", hw->wiphy->debugfsdir);
2772         debugfs_create_file("ps", 0666, data->debugfs, data, &hwsim_fops_ps);
2773         debugfs_create_file("group", 0666, data->debugfs, data,
2774                             &hwsim_fops_group);
2775         if (!data->use_chanctx)
2776                 debugfs_create_file("dfs_simulate_radar", 0222,
2777                                     data->debugfs,
2778                                     data, &hwsim_simulate_radar);
2779
2780         tasklet_hrtimer_init(&data->beacon_timer,
2781                              mac80211_hwsim_beacon,
2782                              CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2783
2784         spin_lock_bh(&hwsim_radio_lock);
2785         err = rhashtable_insert_fast(&hwsim_radios_rht, &data->rht,
2786                                      hwsim_rht_params);
2787         if (err < 0) {
2788                 pr_debug("mac80211_hwsim: radio index %d already present\n",
2789                          idx);
2790                 spin_unlock_bh(&hwsim_radio_lock);
2791                 goto failed_final_insert;
2792         }
2793
2794         list_add_tail(&data->list, &hwsim_radios);
2795         spin_unlock_bh(&hwsim_radio_lock);
2796
2797         if (idx > 0)
2798                 hwsim_mcast_new_radio(idx, info, param);
2799
2800         return idx;
2801
2802 failed_final_insert:
2803         debugfs_remove_recursive(data->debugfs);
2804         ieee80211_unregister_hw(data->hw);
2805 failed_hw:
2806         device_release_driver(data->dev);
2807 failed_bind:
2808         device_unregister(data->dev);
2809 failed_drvdata:
2810         ieee80211_free_hw(hw);
2811 failed:
2812         return err;
2813 }
2814
2815 static void hwsim_mcast_del_radio(int id, const char *hwname,
2816                                   struct genl_info *info)
2817 {
2818         struct sk_buff *skb;
2819         void *data;
2820         int ret;
2821
2822         skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2823         if (!skb)
2824                 return;
2825
2826         data = genlmsg_put(skb, 0, 0, &hwsim_genl_family, 0,
2827                            HWSIM_CMD_DEL_RADIO);
2828         if (!data)
2829                 goto error;
2830
2831         ret = nla_put_u32(skb, HWSIM_ATTR_RADIO_ID, id);
2832         if (ret < 0)
2833                 goto error;
2834
2835         ret = nla_put(skb, HWSIM_ATTR_RADIO_NAME, strlen(hwname),
2836                       hwname);
2837         if (ret < 0)
2838                 goto error;
2839
2840         genlmsg_end(skb, data);
2841
2842         hwsim_mcast_config_msg(skb, info);
2843
2844         return;
2845
2846 error:
2847         nlmsg_free(skb);
2848 }
2849
2850 static void mac80211_hwsim_del_radio(struct mac80211_hwsim_data *data,
2851                                      const char *hwname,
2852                                      struct genl_info *info)
2853 {
2854         hwsim_mcast_del_radio(data->idx, hwname, info);
2855         debugfs_remove_recursive(data->debugfs);
2856         ieee80211_unregister_hw(data->hw);
2857         device_release_driver(data->dev);
2858         device_unregister(data->dev);
2859         ieee80211_free_hw(data->hw);
2860 }
2861
2862 static int mac80211_hwsim_get_radio(struct sk_buff *skb,
2863                                     struct mac80211_hwsim_data *data,
2864                                     u32 portid, u32 seq,
2865                                     struct netlink_callback *cb, int flags)
2866 {
2867         void *hdr;
2868         struct hwsim_new_radio_params param = { };
2869         int res = -EMSGSIZE;
2870
2871         hdr = genlmsg_put(skb, portid, seq, &hwsim_genl_family, flags,
2872                           HWSIM_CMD_GET_RADIO);
2873         if (!hdr)
2874                 return -EMSGSIZE;
2875
2876         if (cb)
2877                 genl_dump_check_consistent(cb, hdr);
2878
2879         if (data->alpha2[0] && data->alpha2[1])
2880                 param.reg_alpha2 = data->alpha2;
2881
2882         param.reg_strict = !!(data->hw->wiphy->regulatory_flags &
2883                                         REGULATORY_STRICT_REG);
2884         param.p2p_device = !!(data->hw->wiphy->interface_modes &
2885                                         BIT(NL80211_IFTYPE_P2P_DEVICE));
2886         param.use_chanctx = data->use_chanctx;
2887         param.regd = data->regd;
2888         param.channels = data->channels;
2889         param.hwname = wiphy_name(data->hw->wiphy);
2890
2891         res = append_radio_msg(skb, data->idx, &param);
2892         if (res < 0)
2893                 goto out_err;
2894
2895         genlmsg_end(skb, hdr);
2896         return 0;
2897
2898 out_err:
2899         genlmsg_cancel(skb, hdr);
2900         return res;
2901 }
2902
2903 static void mac80211_hwsim_free(void)
2904 {
2905         struct mac80211_hwsim_data *data;
2906
2907         spin_lock_bh(&hwsim_radio_lock);
2908         while ((data = list_first_entry_or_null(&hwsim_radios,
2909                                                 struct mac80211_hwsim_data,
2910                                                 list))) {
2911                 list_del(&data->list);
2912                 spin_unlock_bh(&hwsim_radio_lock);
2913                 mac80211_hwsim_del_radio(data, wiphy_name(data->hw->wiphy),
2914                                          NULL);
2915                 spin_lock_bh(&hwsim_radio_lock);
2916         }
2917         spin_unlock_bh(&hwsim_radio_lock);
2918         class_destroy(hwsim_class);
2919 }
2920
2921 static const struct net_device_ops hwsim_netdev_ops = {
2922         .ndo_start_xmit         = hwsim_mon_xmit,
2923         .ndo_set_mac_address    = eth_mac_addr,
2924         .ndo_validate_addr      = eth_validate_addr,
2925 };
2926
2927 static void hwsim_mon_setup(struct net_device *dev)
2928 {
2929         dev->netdev_ops = &hwsim_netdev_ops;
2930         dev->needs_free_netdev = true;
2931         ether_setup(dev);
2932         dev->priv_flags |= IFF_NO_QUEUE;
2933         dev->type = ARPHRD_IEEE80211_RADIOTAP;
2934         eth_zero_addr(dev->dev_addr);
2935         dev->dev_addr[0] = 0x12;
2936 }
2937
2938 static struct mac80211_hwsim_data *get_hwsim_data_ref_from_addr(const u8 *addr)
2939 {
2940         return rhashtable_lookup_fast(&hwsim_radios_rht,
2941                                       addr,
2942                                       hwsim_rht_params);
2943 }
2944
2945 static void hwsim_register_wmediumd(struct net *net, u32 portid)
2946 {
2947         struct mac80211_hwsim_data *data;
2948
2949         hwsim_net_set_wmediumd(net, portid);
2950
2951         spin_lock_bh(&hwsim_radio_lock);
2952         list_for_each_entry(data, &hwsim_radios, list) {
2953                 if (data->netgroup == hwsim_net_get_netgroup(net))
2954                         data->wmediumd = portid;
2955         }
2956         spin_unlock_bh(&hwsim_radio_lock);
2957 }
2958
2959 static int hwsim_tx_info_frame_received_nl(struct sk_buff *skb_2,
2960                                            struct genl_info *info)
2961 {
2962
2963         struct ieee80211_hdr *hdr;
2964         struct mac80211_hwsim_data *data2;
2965         struct ieee80211_tx_info *txi;
2966         struct hwsim_tx_rate *tx_attempts;
2967         u64 ret_skb_cookie;
2968         struct sk_buff *skb, *tmp;
2969         const u8 *src;
2970         unsigned int hwsim_flags;
2971         int i;
2972         bool found = false;
2973
2974         if (!info->attrs[HWSIM_ATTR_ADDR_TRANSMITTER] ||
2975             !info->attrs[HWSIM_ATTR_FLAGS] ||
2976             !info->attrs[HWSIM_ATTR_COOKIE] ||
2977             !info->attrs[HWSIM_ATTR_SIGNAL] ||
2978             !info->attrs[HWSIM_ATTR_TX_INFO])
2979                 goto out;
2980
2981         src = (void *)nla_data(info->attrs[HWSIM_ATTR_ADDR_TRANSMITTER]);
2982         hwsim_flags = nla_get_u32(info->attrs[HWSIM_ATTR_FLAGS]);
2983         ret_skb_cookie = nla_get_u64(info->attrs[HWSIM_ATTR_COOKIE]);
2984
2985         data2 = get_hwsim_data_ref_from_addr(src);
2986         if (!data2)
2987                 goto out;
2988
2989         if (hwsim_net_get_netgroup(genl_info_net(info)) != data2->netgroup)
2990                 goto out;
2991
2992         if (info->snd_portid != data2->wmediumd)
2993                 goto out;
2994
2995         /* look for the skb matching the cookie passed back from user */
2996         skb_queue_walk_safe(&data2->pending, skb, tmp) {
2997                 u64 skb_cookie;
2998
2999                 txi = IEEE80211_SKB_CB(skb);
3000                 skb_cookie = (u64)(uintptr_t)txi->rate_driver_data[0];
3001
3002                 if (skb_cookie == ret_skb_cookie) {
3003                         skb_unlink(skb, &data2->pending);
3004                         found = true;
3005                         break;
3006                 }
3007         }
3008
3009         /* not found */
3010         if (!found)
3011                 goto out;
3012
3013         /* Tx info received because the frame was broadcasted on user space,
3014          so we get all the necessary info: tx attempts and skb control buff */
3015
3016         tx_attempts = (struct hwsim_tx_rate *)nla_data(
3017                        info->attrs[HWSIM_ATTR_TX_INFO]);
3018
3019         /* now send back TX status */
3020         txi = IEEE80211_SKB_CB(skb);
3021
3022         ieee80211_tx_info_clear_status(txi);
3023
3024         for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
3025                 txi->status.rates[i].idx = tx_attempts[i].idx;
3026                 txi->status.rates[i].count = tx_attempts[i].count;
3027         }
3028
3029         txi->status.ack_signal = nla_get_u32(info->attrs[HWSIM_ATTR_SIGNAL]);
3030
3031         if (!(hwsim_flags & HWSIM_TX_CTL_NO_ACK) &&
3032            (hwsim_flags & HWSIM_TX_STAT_ACK)) {
3033                 if (skb->len >= 16) {
3034                         hdr = (struct ieee80211_hdr *) skb->data;
3035                         mac80211_hwsim_monitor_ack(data2->channel,
3036                                                    hdr->addr2);
3037                 }
3038                 txi->flags |= IEEE80211_TX_STAT_ACK;
3039         }
3040         ieee80211_tx_status_irqsafe(data2->hw, skb);
3041         return 0;
3042 out:
3043         return -EINVAL;
3044
3045 }
3046
3047 static int hwsim_cloned_frame_received_nl(struct sk_buff *skb_2,
3048                                           struct genl_info *info)
3049 {
3050         struct mac80211_hwsim_data *data2;
3051         struct ieee80211_rx_status rx_status;
3052         const u8 *dst;
3053         int frame_data_len;
3054         void *frame_data;
3055         struct sk_buff *skb = NULL;
3056
3057         if (!info->attrs[HWSIM_ATTR_ADDR_RECEIVER] ||
3058             !info->attrs[HWSIM_ATTR_FRAME] ||
3059             !info->attrs[HWSIM_ATTR_RX_RATE] ||
3060             !info->attrs[HWSIM_ATTR_SIGNAL])
3061                 goto out;
3062
3063         dst = (void *)nla_data(info->attrs[HWSIM_ATTR_ADDR_RECEIVER]);
3064         frame_data_len = nla_len(info->attrs[HWSIM_ATTR_FRAME]);
3065         frame_data = (void *)nla_data(info->attrs[HWSIM_ATTR_FRAME]);
3066
3067         /* Allocate new skb here */
3068         skb = alloc_skb(frame_data_len, GFP_KERNEL);
3069         if (skb == NULL)
3070                 goto err;
3071
3072         if (frame_data_len > IEEE80211_MAX_DATA_LEN)
3073                 goto err;
3074
3075         /* Copy the data */
3076         skb_put_data(skb, frame_data, frame_data_len);
3077
3078         data2 = get_hwsim_data_ref_from_addr(dst);
3079         if (!data2)
3080                 goto out;
3081
3082         if (hwsim_net_get_netgroup(genl_info_net(info)) != data2->netgroup)
3083                 goto out;
3084
3085         if (info->snd_portid != data2->wmediumd)
3086                 goto out;
3087
3088         /* check if radio is configured properly */
3089
3090         if (data2->idle || !data2->started)
3091                 goto out;
3092
3093         /* A frame is received from user space */
3094         memset(&rx_status, 0, sizeof(rx_status));
3095         if (info->attrs[HWSIM_ATTR_FREQ]) {
3096                 /* throw away off-channel packets, but allow both the temporary
3097                  * ("hw" scan/remain-on-channel) and regular channel, since the
3098                  * internal datapath also allows this
3099                  */
3100                 mutex_lock(&data2->mutex);
3101                 rx_status.freq = nla_get_u32(info->attrs[HWSIM_ATTR_FREQ]);
3102
3103                 if (rx_status.freq != data2->channel->center_freq &&
3104                     (!data2->tmp_chan ||
3105                      rx_status.freq != data2->tmp_chan->center_freq)) {
3106                         mutex_unlock(&data2->mutex);
3107                         goto out;
3108                 }
3109                 mutex_unlock(&data2->mutex);
3110         } else {
3111                 rx_status.freq = data2->channel->center_freq;
3112         }
3113
3114         rx_status.band = data2->channel->band;
3115         rx_status.rate_idx = nla_get_u32(info->attrs[HWSIM_ATTR_RX_RATE]);
3116         rx_status.signal = nla_get_u32(info->attrs[HWSIM_ATTR_SIGNAL]);
3117
3118         memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
3119         data2->rx_pkts++;
3120         data2->rx_bytes += skb->len;
3121         ieee80211_rx_irqsafe(data2->hw, skb);
3122
3123         return 0;
3124 err:
3125         pr_debug("mac80211_hwsim: error occurred in %s\n", __func__);
3126 out:
3127         dev_kfree_skb(skb);
3128         return -EINVAL;
3129 }
3130
3131 static int hwsim_register_received_nl(struct sk_buff *skb_2,
3132                                       struct genl_info *info)
3133 {
3134         struct net *net = genl_info_net(info);
3135         struct mac80211_hwsim_data *data;
3136         int chans = 1;
3137
3138         spin_lock_bh(&hwsim_radio_lock);
3139         list_for_each_entry(data, &hwsim_radios, list)
3140                 chans = max(chans, data->channels);
3141         spin_unlock_bh(&hwsim_radio_lock);
3142
3143         /* In the future we should revise the userspace API and allow it
3144          * to set a flag that it does support multi-channel, then we can
3145          * let this pass conditionally on the flag.
3146          * For current userspace, prohibit it since it won't work right.
3147          */
3148         if (chans > 1)
3149                 return -EOPNOTSUPP;
3150
3151         if (hwsim_net_get_wmediumd(net))
3152                 return -EBUSY;
3153
3154         hwsim_register_wmediumd(net, info->snd_portid);
3155
3156         pr_debug("mac80211_hwsim: received a REGISTER, "
3157                "switching to wmediumd mode with pid %d\n", info->snd_portid);
3158
3159         return 0;
3160 }
3161
3162 static int hwsim_new_radio_nl(struct sk_buff *msg, struct genl_info *info)
3163 {
3164         struct hwsim_new_radio_params param = { 0 };
3165         const char *hwname = NULL;
3166         int ret;
3167
3168         param.reg_strict = info->attrs[HWSIM_ATTR_REG_STRICT_REG];
3169         param.p2p_device = info->attrs[HWSIM_ATTR_SUPPORT_P2P_DEVICE];
3170         param.channels = channels;
3171         param.destroy_on_close =
3172                 info->attrs[HWSIM_ATTR_DESTROY_RADIO_ON_CLOSE];
3173
3174         if (info->attrs[HWSIM_ATTR_CHANNELS])
3175                 param.channels = nla_get_u32(info->attrs[HWSIM_ATTR_CHANNELS]);
3176
3177         if (param.channels > CFG80211_MAX_NUM_DIFFERENT_CHANNELS) {
3178                 GENL_SET_ERR_MSG(info, "too many channels specified");
3179                 return -EINVAL;
3180         }
3181
3182         if (info->attrs[HWSIM_ATTR_NO_VIF])
3183                 param.no_vif = true;
3184
3185         if (info->attrs[HWSIM_ATTR_RADIO_NAME]) {
3186                 hwname = kasprintf(GFP_KERNEL, "%.*s",
3187                                    nla_len(info->attrs[HWSIM_ATTR_RADIO_NAME]),
3188                                    (char *)nla_data(info->attrs[HWSIM_ATTR_RADIO_NAME]));
3189                 if (!hwname)
3190                         return -ENOMEM;
3191                 param.hwname = hwname;
3192         }
3193
3194         if (info->attrs[HWSIM_ATTR_USE_CHANCTX])
3195                 param.use_chanctx = true;
3196         else
3197                 param.use_chanctx = (param.channels > 1);
3198
3199         if (info->attrs[HWSIM_ATTR_REG_HINT_ALPHA2])
3200                 param.reg_alpha2 =
3201                         nla_data(info->attrs[HWSIM_ATTR_REG_HINT_ALPHA2]);
3202
3203         if (info->attrs[HWSIM_ATTR_REG_CUSTOM_REG]) {
3204                 u32 idx = nla_get_u32(info->attrs[HWSIM_ATTR_REG_CUSTOM_REG]);
3205
3206                 if (idx >= ARRAY_SIZE(hwsim_world_regdom_custom)) {
3207                         kfree(hwname);
3208                         return -EINVAL;
3209                 }
3210                 param.regd = hwsim_world_regdom_custom[idx];
3211         }
3212
3213         ret = mac80211_hwsim_new_radio(info, &param);
3214         kfree(hwname);
3215         return ret;
3216 }
3217
3218 static int hwsim_del_radio_nl(struct sk_buff *msg, struct genl_info *info)
3219 {
3220         struct mac80211_hwsim_data *data;
3221         s64 idx = -1;
3222         const char *hwname = NULL;
3223
3224         if (info->attrs[HWSIM_ATTR_RADIO_ID]) {
3225                 idx = nla_get_u32(info->attrs[HWSIM_ATTR_RADIO_ID]);
3226         } else if (info->attrs[HWSIM_ATTR_RADIO_NAME]) {
3227                 hwname = kasprintf(GFP_KERNEL, "%.*s",
3228                                    nla_len(info->attrs[HWSIM_ATTR_RADIO_NAME]),
3229                                    (char *)nla_data(info->attrs[HWSIM_ATTR_RADIO_NAME]));
3230                 if (!hwname)
3231                         return -ENOMEM;
3232         } else
3233                 return -EINVAL;
3234
3235         spin_lock_bh(&hwsim_radio_lock);
3236         list_for_each_entry(data, &hwsim_radios, list) {
3237                 if (idx >= 0) {
3238                         if (data->idx != idx)
3239                                 continue;
3240                 } else {
3241                         if (!hwname ||
3242                             strcmp(hwname, wiphy_name(data->hw->wiphy)))
3243                                 continue;
3244                 }
3245
3246                 if (!net_eq(wiphy_net(data->hw->wiphy), genl_info_net(info)))
3247                         continue;
3248
3249                 list_del(&data->list);
3250                 rhashtable_remove_fast(&hwsim_radios_rht, &data->rht,
3251                                        hwsim_rht_params);
3252                 spin_unlock_bh(&hwsim_radio_lock);
3253                 mac80211_hwsim_del_radio(data, wiphy_name(data->hw->wiphy),
3254                                          info);
3255                 kfree(hwname);
3256                 return 0;
3257         }
3258         spin_unlock_bh(&hwsim_radio_lock);
3259
3260         kfree(hwname);
3261         return -ENODEV;
3262 }
3263
3264 static int hwsim_get_radio_nl(struct sk_buff *msg, struct genl_info *info)
3265 {
3266         struct mac80211_hwsim_data *data;
3267         struct sk_buff *skb;
3268         int idx, res = -ENODEV;
3269
3270         if (!info->attrs[HWSIM_ATTR_RADIO_ID])
3271                 return -EINVAL;
3272         idx = nla_get_u32(info->attrs[HWSIM_ATTR_RADIO_ID]);
3273
3274         spin_lock_bh(&hwsim_radio_lock);
3275         list_for_each_entry(data, &hwsim_radios, list) {
3276                 if (data->idx != idx)
3277                         continue;
3278
3279                 if (!net_eq(wiphy_net(data->hw->wiphy), genl_info_net(info)))
3280                         continue;
3281
3282                 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
3283                 if (!skb) {
3284                         res = -ENOMEM;
3285                         goto out_err;
3286                 }
3287
3288                 res = mac80211_hwsim_get_radio(skb, data, info->snd_portid,
3289                                                info->snd_seq, NULL, 0);
3290                 if (res < 0) {
3291                         nlmsg_free(skb);
3292                         goto out_err;
3293                 }
3294
3295                 genlmsg_reply(skb, info);
3296                 break;
3297         }
3298
3299 out_err:
3300         spin_unlock_bh(&hwsim_radio_lock);
3301
3302         return res;
3303 }
3304
3305 static int hwsim_dump_radio_nl(struct sk_buff *skb,
3306                                struct netlink_callback *cb)
3307 {
3308         int idx = cb->args[0];
3309         struct mac80211_hwsim_data *data = NULL;
3310         int res;
3311
3312         spin_lock_bh(&hwsim_radio_lock);
3313
3314         if (idx == hwsim_radio_idx)
3315                 goto done;
3316
3317         list_for_each_entry(data, &hwsim_radios, list) {
3318                 if (data->idx < idx)
3319                         continue;
3320
3321                 if (!net_eq(wiphy_net(data->hw->wiphy), sock_net(skb->sk)))
3322                         continue;
3323
3324                 res = mac80211_hwsim_get_radio(skb, data,
3325                                                NETLINK_CB(cb->skb).portid,
3326                                                cb->nlh->nlmsg_seq, cb,
3327                                                NLM_F_MULTI);
3328                 if (res < 0)
3329                         break;
3330
3331                 idx = data->idx + 1;
3332         }
3333
3334         cb->args[0] = idx;
3335
3336 done:
3337         spin_unlock_bh(&hwsim_radio_lock);
3338         return skb->len;
3339 }
3340
3341 /* Generic Netlink operations array */
3342 static const struct genl_ops hwsim_ops[] = {
3343         {
3344                 .cmd = HWSIM_CMD_REGISTER,
3345                 .policy = hwsim_genl_policy,
3346                 .doit = hwsim_register_received_nl,
3347                 .flags = GENL_UNS_ADMIN_PERM,
3348         },
3349         {
3350                 .cmd = HWSIM_CMD_FRAME,
3351                 .policy = hwsim_genl_policy,
3352                 .doit = hwsim_cloned_frame_received_nl,
3353         },
3354         {
3355                 .cmd = HWSIM_CMD_TX_INFO_FRAME,
3356                 .policy = hwsim_genl_policy,
3357                 .doit = hwsim_tx_info_frame_received_nl,
3358         },
3359         {
3360                 .cmd = HWSIM_CMD_NEW_RADIO,
3361                 .policy = hwsim_genl_policy,
3362                 .doit = hwsim_new_radio_nl,
3363                 .flags = GENL_UNS_ADMIN_PERM,
3364         },
3365         {
3366                 .cmd = HWSIM_CMD_DEL_RADIO,
3367                 .policy = hwsim_genl_policy,
3368                 .doit = hwsim_del_radio_nl,
3369                 .flags = GENL_UNS_ADMIN_PERM,
3370         },
3371         {
3372                 .cmd = HWSIM_CMD_GET_RADIO,
3373                 .policy = hwsim_genl_policy,
3374                 .doit = hwsim_get_radio_nl,
3375                 .dumpit = hwsim_dump_radio_nl,
3376         },
3377 };
3378
3379 static struct genl_family hwsim_genl_family __ro_after_init = {
3380         .name = "MAC80211_HWSIM",
3381         .version = 1,
3382         .maxattr = HWSIM_ATTR_MAX,
3383         .netnsok = true,
3384         .module = THIS_MODULE,
3385         .ops = hwsim_ops,
3386         .n_ops = ARRAY_SIZE(hwsim_ops),
3387         .mcgrps = hwsim_mcgrps,
3388         .n_mcgrps = ARRAY_SIZE(hwsim_mcgrps),
3389 };
3390
3391 static void destroy_radio(struct work_struct *work)
3392 {
3393         struct mac80211_hwsim_data *data =
3394                 container_of(work, struct mac80211_hwsim_data, destroy_work);
3395
3396         mac80211_hwsim_del_radio(data, wiphy_name(data->hw->wiphy), NULL);
3397 }
3398
3399 static void remove_user_radios(u32 portid)
3400 {
3401         struct mac80211_hwsim_data *entry, *tmp;
3402
3403         spin_lock_bh(&hwsim_radio_lock);
3404         list_for_each_entry_safe(entry, tmp, &hwsim_radios, list) {
3405                 if (entry->destroy_on_close && entry->portid == portid) {
3406                         list_del(&entry->list);
3407                         rhashtable_remove_fast(&hwsim_radios_rht, &entry->rht,
3408                                                hwsim_rht_params);
3409                         INIT_WORK(&entry->destroy_work, destroy_radio);
3410                         queue_work(hwsim_wq, &entry->destroy_work);
3411                 }
3412         }
3413         spin_unlock_bh(&hwsim_radio_lock);
3414 }
3415
3416 static int mac80211_hwsim_netlink_notify(struct notifier_block *nb,
3417                                          unsigned long state,
3418                                          void *_notify)
3419 {
3420         struct netlink_notify *notify = _notify;
3421
3422         if (state != NETLINK_URELEASE)
3423                 return NOTIFY_DONE;
3424
3425         remove_user_radios(notify->portid);
3426
3427         if (notify->portid == hwsim_net_get_wmediumd(notify->net)) {
3428                 printk(KERN_INFO "mac80211_hwsim: wmediumd released netlink"
3429                        " socket, switching to perfect channel medium\n");
3430                 hwsim_register_wmediumd(notify->net, 0);
3431         }
3432         return NOTIFY_DONE;
3433
3434 }
3435
3436 static struct notifier_block hwsim_netlink_notifier = {
3437         .notifier_call = mac80211_hwsim_netlink_notify,
3438 };
3439
3440 static int __init hwsim_init_netlink(void)
3441 {
3442         int rc;
3443
3444         printk(KERN_INFO "mac80211_hwsim: initializing netlink\n");
3445
3446         rc = genl_register_family(&hwsim_genl_family);
3447         if (rc)
3448                 goto failure;
3449
3450         rc = netlink_register_notifier(&hwsim_netlink_notifier);
3451         if (rc) {
3452                 genl_unregister_family(&hwsim_genl_family);
3453                 goto failure;
3454         }
3455
3456         return 0;
3457
3458 failure:
3459         pr_debug("mac80211_hwsim: error occurred in %s\n", __func__);
3460         return -EINVAL;
3461 }
3462
3463 static __net_init int hwsim_init_net(struct net *net)
3464 {
3465         hwsim_net_set_netgroup(net);
3466
3467         return 0;
3468 }
3469
3470 static void __net_exit hwsim_exit_net(struct net *net)
3471 {
3472         struct mac80211_hwsim_data *data, *tmp;
3473
3474         spin_lock_bh(&hwsim_radio_lock);
3475         list_for_each_entry_safe(data, tmp, &hwsim_radios, list) {
3476                 if (!net_eq(wiphy_net(data->hw->wiphy), net))
3477                         continue;
3478
3479                 /* Radios created in init_net are returned to init_net. */
3480                 if (data->netgroup == hwsim_net_get_netgroup(&init_net))
3481                         continue;
3482
3483                 list_del(&data->list);
3484                 rhashtable_remove_fast(&hwsim_radios_rht, &data->rht,
3485                                        hwsim_rht_params);
3486                 INIT_WORK(&data->destroy_work, destroy_radio);
3487                 queue_work(hwsim_wq, &data->destroy_work);
3488         }
3489         spin_unlock_bh(&hwsim_radio_lock);
3490 }
3491
3492 static struct pernet_operations hwsim_net_ops = {
3493         .init = hwsim_init_net,
3494         .exit = hwsim_exit_net,
3495         .id   = &hwsim_net_id,
3496         .size = sizeof(struct hwsim_net),
3497 };
3498
3499 static void hwsim_exit_netlink(void)
3500 {
3501         /* unregister the notifier */
3502         netlink_unregister_notifier(&hwsim_netlink_notifier);
3503         /* unregister the family */
3504         genl_unregister_family(&hwsim_genl_family);
3505 }
3506
3507 static int __init init_mac80211_hwsim(void)
3508 {
3509         int i, err;
3510
3511         if (radios < 0 || radios > 100)
3512                 return -EINVAL;
3513
3514         if (channels < 1)
3515                 return -EINVAL;
3516
3517         spin_lock_init(&hwsim_radio_lock);
3518
3519         hwsim_wq = alloc_workqueue("hwsim_wq", 0, 0);
3520         if (!hwsim_wq)
3521                 return -ENOMEM;
3522         rhashtable_init(&hwsim_radios_rht, &hwsim_rht_params);
3523
3524         err = register_pernet_device(&hwsim_net_ops);
3525         if (err)
3526                 return err;
3527
3528         err = platform_driver_register(&mac80211_hwsim_driver);
3529         if (err)
3530                 goto out_unregister_pernet;
3531
3532         hwsim_class = class_create(THIS_MODULE, "mac80211_hwsim");
3533         if (IS_ERR(hwsim_class)) {
3534                 err = PTR_ERR(hwsim_class);
3535                 goto out_unregister_driver;
3536         }
3537
3538         err = hwsim_init_netlink();
3539         if (err < 0)
3540                 goto out_unregister_driver;
3541
3542         for (i = 0; i < radios; i++) {
3543                 struct hwsim_new_radio_params param = { 0 };
3544
3545                 param.channels = channels;
3546
3547                 switch (regtest) {
3548                 case HWSIM_REGTEST_DIFF_COUNTRY:
3549                         if (i < ARRAY_SIZE(hwsim_alpha2s))
3550                                 param.reg_alpha2 = hwsim_alpha2s[i];
3551                         break;
3552                 case HWSIM_REGTEST_DRIVER_REG_FOLLOW:
3553                         if (!i)
3554                                 param.reg_alpha2 = hwsim_alpha2s[0];
3555                         break;
3556                 case HWSIM_REGTEST_STRICT_ALL:
3557                         param.reg_strict = true;
3558                 case HWSIM_REGTEST_DRIVER_REG_ALL:
3559                         param.reg_alpha2 = hwsim_alpha2s[0];
3560                         break;
3561                 case HWSIM_REGTEST_WORLD_ROAM:
3562                         if (i == 0)
3563                                 param.regd = &hwsim_world_regdom_custom_01;
3564                         break;
3565                 case HWSIM_REGTEST_CUSTOM_WORLD:
3566                         param.regd = &hwsim_world_regdom_custom_01;
3567                         break;
3568                 case HWSIM_REGTEST_CUSTOM_WORLD_2:
3569                         if (i == 0)
3570                                 param.regd = &hwsim_world_regdom_custom_01;
3571                         else if (i == 1)
3572                                 param.regd = &hwsim_world_regdom_custom_02;
3573                         break;
3574                 case HWSIM_REGTEST_STRICT_FOLLOW:
3575                         if (i == 0) {
3576                                 param.reg_strict = true;
3577                                 param.reg_alpha2 = hwsim_alpha2s[0];
3578                         }
3579                         break;
3580                 case HWSIM_REGTEST_STRICT_AND_DRIVER_REG:
3581                         if (i == 0) {
3582                                 param.reg_strict = true;
3583                                 param.reg_alpha2 = hwsim_alpha2s[0];
3584                         } else if (i == 1) {
3585                                 param.reg_alpha2 = hwsim_alpha2s[1];
3586                         }
3587                         break;
3588                 case HWSIM_REGTEST_ALL:
3589                         switch (i) {
3590                         case 0:
3591                                 param.regd = &hwsim_world_regdom_custom_01;
3592                                 break;
3593                         case 1:
3594                                 param.regd = &hwsim_world_regdom_custom_02;
3595                                 break;
3596                         case 2:
3597                                 param.reg_alpha2 = hwsim_alpha2s[0];
3598                                 break;
3599                         case 3:
3600                                 param.reg_alpha2 = hwsim_alpha2s[1];
3601                                 break;
3602                         case 4:
3603                                 param.reg_strict = true;
3604                                 param.reg_alpha2 = hwsim_alpha2s[2];
3605                                 break;
3606                         }
3607                         break;
3608                 default:
3609                         break;
3610                 }
3611
3612                 param.p2p_device = support_p2p_device;
3613                 param.use_chanctx = channels > 1;
3614
3615                 err = mac80211_hwsim_new_radio(NULL, &param);
3616                 if (err < 0)
3617                         goto out_free_radios;
3618         }
3619
3620         hwsim_mon = alloc_netdev(0, "hwsim%d", NET_NAME_UNKNOWN,
3621                                  hwsim_mon_setup);
3622         if (hwsim_mon == NULL) {
3623                 err = -ENOMEM;
3624                 goto out_free_radios;
3625         }
3626
3627         rtnl_lock();
3628         err = dev_alloc_name(hwsim_mon, hwsim_mon->name);
3629         if (err < 0) {
3630                 rtnl_unlock();
3631                 goto out_free_radios;
3632         }
3633
3634         err = register_netdevice(hwsim_mon);
3635         if (err < 0) {
3636                 rtnl_unlock();
3637                 goto out_free_mon;
3638         }
3639         rtnl_unlock();
3640
3641         return 0;
3642
3643 out_free_mon:
3644         free_netdev(hwsim_mon);
3645 out_free_radios:
3646         mac80211_hwsim_free();
3647 out_unregister_driver:
3648         platform_driver_unregister(&mac80211_hwsim_driver);
3649 out_unregister_pernet:
3650         unregister_pernet_device(&hwsim_net_ops);
3651         return err;
3652 }
3653 module_init(init_mac80211_hwsim);
3654
3655 static void __exit exit_mac80211_hwsim(void)
3656 {
3657         pr_debug("mac80211_hwsim: unregister radios\n");
3658
3659         hwsim_exit_netlink();
3660
3661         mac80211_hwsim_free();
3662         flush_workqueue(hwsim_wq);
3663
3664         rhashtable_destroy(&hwsim_radios_rht);
3665         unregister_netdev(hwsim_mon);
3666         platform_driver_unregister(&mac80211_hwsim_driver);
3667         unregister_pernet_device(&hwsim_net_ops);
3668         destroy_workqueue(hwsim_wq);
3669 }
3670 module_exit(exit_mac80211_hwsim);