drivers/net/wireless/mac80211_hwsim.c

   1 /*
   2  * mac80211_hwsim - software simulator of 802.11 radio(s) for mac80211
   3  * Copyright (c) 2008, Jouni Malinen <j@w1.fi>
   4  * Copyright (c) 2011, Javier Lopez <jlopex@gmail.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 /*
  12  * TODO:
  13  * - Add TSF sync and fix IBSS beacon transmission by adding
  14  *   competition for "air time" at TBTT
  15  * - RX filtering based on filter configuration (data->rx_filter)
  16  */
  17
  18 #include <linux/list.h>
  19 #include <linux/slab.h>
  20 #include <linux/spinlock.h>
  21 #include <net/dst.h>
  22 #include <net/xfrm.h>
  23 #include <net/mac80211.h>
  24 #include <net/ieee80211_radiotap.h>
  25 #include <linux/if_arp.h>
  26 #include <linux/rtnetlink.h>
  27 #include <linux/etherdevice.h>
  28 #include <linux/platform_device.h>
  29 #include <linux/debugfs.h>
  30 #include <linux/module.h>
  31 #include <linux/ktime.h>
  32 #include <net/genetlink.h>
  33 #include <net/net_namespace.h>
  34 #include <net/netns/generic.h>
  35 #include "mac80211_hwsim.h"
  36
  37 #define WARN_QUEUE 100
  38 #define MAX_QUEUE 200
  39
  40 MODULE_AUTHOR("Jouni Malinen");
  41 MODULE_DESCRIPTION("Software simulator of 802.11 radio(s) for mac80211");
  42 MODULE_LICENSE("GPL");
  43
  44 static int radios = 2;
  45 module_param(radios, int, 0444);
  46 MODULE_PARM_DESC(radios, "Number of simulated radios");
  47
  48 static int channels = 1;
  49 module_param(channels, int, 0444);
  50 MODULE_PARM_DESC(channels, "Number of concurrent channels");
  51
  52 static bool paged_rx = false;
  53 module_param(paged_rx, bool, 0644);
  54 MODULE_PARM_DESC(paged_rx, "Use paged SKBs for RX instead of linear ones");
  55
  56 static bool rctbl = false;
  57 module_param(rctbl, bool, 0444);
  58 MODULE_PARM_DESC(rctbl, "Handle rate control table");
  59
  60 static bool support_p2p_device = true;
  61 module_param(support_p2p_device, bool, 0444);
  62 MODULE_PARM_DESC(support_p2p_device, "Support P2P-Device interface type");
  63
  64 /**
  65  * enum hwsim_regtest - the type of regulatory tests we offer
  66  *
  67  * These are the different values you can use for the regtest
  68  * module parameter. This is useful to help test world roaming
  69  * and the driver regulatory_hint() call and combinations of these.
  70  * If you want to do specific alpha2 regulatory domain tests simply
  71  * use the userspace regulatory request as that will be respected as
  72  * well without the need of this module parameter. This is designed
  73  * only for testing the driver regulatory request, world roaming
  74  * and all possible combinations.
  75  *
  76  * @HWSIM_REGTEST_DISABLED: No regulatory tests are performed,
  77  *      this is the default value.
  78  * @HWSIM_REGTEST_DRIVER_REG_FOLLOW: Used for testing the driver regulatory
  79  *      hint, only one driver regulatory hint will be sent as such the
  80  *      secondary radios are expected to follow.
  81  * @HWSIM_REGTEST_DRIVER_REG_ALL: Used for testing the driver regulatory
  82  *      request with all radios reporting the same regulatory domain.
  83  * @HWSIM_REGTEST_DIFF_COUNTRY: Used for testing the drivers calling
  84  *      different regulatory domains requests. Expected behaviour is for
  85  *      an intersection to occur but each device will still use their
  86  *      respective regulatory requested domains. Subsequent radios will
  87  *      use the resulting intersection.
  88  * @HWSIM_REGTEST_WORLD_ROAM: Used for testing the world roaming. We accomplish
  89  *      this by using a custom beacon-capable regulatory domain for the first
  90  *      radio. All other device world roam.
  91  * @HWSIM_REGTEST_CUSTOM_WORLD: Used for testing the custom world regulatory
  92  *      domain requests. All radios will adhere to this custom world regulatory
  93  *      domain.
  94  * @HWSIM_REGTEST_CUSTOM_WORLD_2: Used for testing 2 custom world regulatory
  95  *      domain requests. The first radio will adhere to the first custom world
  96  *      regulatory domain, the second one to the second custom world regulatory
  97  *      domain. All other devices will world roam.
  98  * @HWSIM_REGTEST_STRICT_FOLLOW_: Used for testing strict regulatory domain
  99  *      settings, only the first radio will send a regulatory domain request
 100  *      and use strict settings. The rest of the radios are expected to follow.
 101  * @HWSIM_REGTEST_STRICT_ALL: Used for testing strict regulatory domain
 102  *      settings. All radios will adhere to this.
 103  * @HWSIM_REGTEST_STRICT_AND_DRIVER_REG: Used for testing strict regulatory
 104  *      domain settings, combined with secondary driver regulatory domain
 105  *      settings. The first radio will get a strict regulatory domain setting
 106  *      using the first driver regulatory request and the second radio will use
 107  *      non-strict settings using the second driver regulatory request. All
 108  *      other devices should follow the intersection created between the
 109  *      first two.
 110  * @HWSIM_REGTEST_ALL: Used for testing every possible mix. You will need
 111  *      at least 6 radios for a complete test. We will test in this order:
 112  *      1 - driver custom world regulatory domain
 113  *      2 - second custom world regulatory domain
 114  *      3 - first driver regulatory domain request
 115  *      4 - second driver regulatory domain request
 116  *      5 - strict regulatory domain settings using the third driver regulatory
 117  *          domain request
 118  *      6 and on - should follow the intersection of the 3rd, 4rth and 5th radio
 119  *                 regulatory requests.
 120  */
 121 enum hwsim_regtest {
 122         HWSIM_REGTEST_DISABLED = 0,
 123         HWSIM_REGTEST_DRIVER_REG_FOLLOW = 1,
 124         HWSIM_REGTEST_DRIVER_REG_ALL = 2,
 125         HWSIM_REGTEST_DIFF_COUNTRY = 3,
 126         HWSIM_REGTEST_WORLD_ROAM = 4,
 127         HWSIM_REGTEST_CUSTOM_WORLD = 5,
 128         HWSIM_REGTEST_CUSTOM_WORLD_2 = 6,
 129         HWSIM_REGTEST_STRICT_FOLLOW = 7,
 130         HWSIM_REGTEST_STRICT_ALL = 8,
 131         HWSIM_REGTEST_STRICT_AND_DRIVER_REG = 9,
 132         HWSIM_REGTEST_ALL = 10,
 133 };
 134
 135 /* Set to one of the HWSIM_REGTEST_* values above */
 136 static int regtest = HWSIM_REGTEST_DISABLED;
 137 module_param(regtest, int, 0444);
 138 MODULE_PARM_DESC(regtest, "The type of regulatory test we want to run");
 139
 140 static const char *hwsim_alpha2s[] = {
 141         "FI",
 142         "AL",
 143         "US",
 144         "DE",
 145         "JP",
 146         "AL",
 147 };
 148
 149 static const struct ieee80211_regdomain hwsim_world_regdom_custom_01 = {
 150         .n_reg_rules = 4,
 151         .alpha2 =  "99",
 152         .reg_rules = {
 153                 REG_RULE(2412-10, 2462+10, 40, 0, 20, 0),
 154                 REG_RULE(2484-10, 2484+10, 40, 0, 20, 0),
 155                 REG_RULE(5150-10, 5240+10, 40, 0, 30, 0),
 156                 REG_RULE(5745-10, 5825+10, 40, 0, 30, 0),
 157         }
 158 };
 159
 160 static const struct ieee80211_regdomain hwsim_world_regdom_custom_02 = {
 161         .n_reg_rules = 2,
 162         .alpha2 =  "99",
 163         .reg_rules = {
 164                 REG_RULE(2412-10, 2462+10, 40, 0, 20, 0),
 165                 REG_RULE(5725-10, 5850+10, 40, 0, 30,
 166                          NL80211_RRF_NO_IR),
 167         }
 168 };
 169
 170 static const struct ieee80211_regdomain *hwsim_world_regdom_custom[] = {
 171         &hwsim_world_regdom_custom_01,
 172         &hwsim_world_regdom_custom_02,
 173 };
 174
 175 struct hwsim_vif_priv {
 176         u32 magic;
 177         u8 bssid[ETH_ALEN];
 178         bool assoc;
 179         bool bcn_en;
 180         u16 aid;
 181 };
 182
 183 #define HWSIM_VIF_MAGIC 0x69537748
 184
 185 static inline void hwsim_check_magic(struct ieee80211_vif *vif)
 186 {
 187         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 188         WARN(vp->magic != HWSIM_VIF_MAGIC,
 189              "Invalid VIF (%p) magic %#x, %pM, %d/%d\n",
 190              vif, vp->magic, vif->addr, vif->type, vif->p2p);
 191 }
 192
 193 static inline void hwsim_set_magic(struct ieee80211_vif *vif)
 194 {
 195         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 196         vp->magic = HWSIM_VIF_MAGIC;
 197 }
 198
 199 static inline void hwsim_clear_magic(struct ieee80211_vif *vif)
 200 {
 201         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 202         vp->magic = 0;
 203 }
 204
 205 struct hwsim_sta_priv {
 206         u32 magic;
 207 };
 208
 209 #define HWSIM_STA_MAGIC 0x6d537749
 210
 211 static inline void hwsim_check_sta_magic(struct ieee80211_sta *sta)
 212 {
 213         struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
 214         WARN_ON(sp->magic != HWSIM_STA_MAGIC);
 215 }
 216
 217 static inline void hwsim_set_sta_magic(struct ieee80211_sta *sta)
 218 {
 219         struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
 220         sp->magic = HWSIM_STA_MAGIC;
 221 }
 222
 223 static inline void hwsim_clear_sta_magic(struct ieee80211_sta *sta)
 224 {
 225         struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
 226         sp->magic = 0;
 227 }
 228
 229 struct hwsim_chanctx_priv {
 230         u32 magic;
 231 };
 232
 233 #define HWSIM_CHANCTX_MAGIC 0x6d53774a
 234
 235 static inline void hwsim_check_chanctx_magic(struct ieee80211_chanctx_conf *c)
 236 {
 237         struct hwsim_chanctx_priv *cp = (void *)c->drv_priv;
 238         WARN_ON(cp->magic != HWSIM_CHANCTX_MAGIC);
 239 }
 240
 241 static inline void hwsim_set_chanctx_magic(struct ieee80211_chanctx_conf *c)
 242 {
 243         struct hwsim_chanctx_priv *cp = (void *)c->drv_priv;
 244         cp->magic = HWSIM_CHANCTX_MAGIC;
 245 }
 246
 247 static inline void hwsim_clear_chanctx_magic(struct ieee80211_chanctx_conf *c)
 248 {
 249         struct hwsim_chanctx_priv *cp = (void *)c->drv_priv;
 250         cp->magic = 0;
 251 }
 252
 253 static unsigned int hwsim_net_id;
 254
 255 static int hwsim_netgroup;
 256
 257 struct hwsim_net {
 258         int netgroup;
 259         u32 wmediumd;
 260 };
 261
 262 static inline int hwsim_net_get_netgroup(struct net *net)
 263 {
 264         struct hwsim_net *hwsim_net = net_generic(net, hwsim_net_id);
 265
 266         return hwsim_net->netgroup;
 267 }
 268
 269 static inline void hwsim_net_set_netgroup(struct net *net)
 270 {
 271         struct hwsim_net *hwsim_net = net_generic(net, hwsim_net_id);
 272
 273         hwsim_net->netgroup = hwsim_netgroup++;
 274 }
 275
 276 static inline u32 hwsim_net_get_wmediumd(struct net *net)
 277 {
 278         struct hwsim_net *hwsim_net = net_generic(net, hwsim_net_id);
 279
 280         return hwsim_net->wmediumd;
 281 }
 282
 283 static inline void hwsim_net_set_wmediumd(struct net *net, u32 portid)
 284 {
 285         struct hwsim_net *hwsim_net = net_generic(net, hwsim_net_id);
 286
 287         hwsim_net->wmediumd = portid;
 288 }
 289
 290 static struct class *hwsim_class;
 291
 292 static struct net_device *hwsim_mon; /* global monitor netdev */
 293
 294 #define CHAN2G(_freq)  { \
 295         .band = NL80211_BAND_2GHZ, \
 296         .center_freq = (_freq), \
 297         .hw_value = (_freq), \
 298         .max_power = 20, \
 299 }
 300
 301 #define CHAN5G(_freq) { \
 302         .band = NL80211_BAND_5GHZ, \
 303         .center_freq = (_freq), \
 304         .hw_value = (_freq), \
 305         .max_power = 20, \
 306 }
 307
 308 static const struct ieee80211_channel hwsim_channels_2ghz[] = {
 309         CHAN2G(2412), /* Channel 1 */
 310         CHAN2G(2417), /* Channel 2 */
 311         CHAN2G(2422), /* Channel 3 */
 312         CHAN2G(2427), /* Channel 4 */
 313         CHAN2G(2432), /* Channel 5 */
 314         CHAN2G(2437), /* Channel 6 */
 315         CHAN2G(2442), /* Channel 7 */
 316         CHAN2G(2447), /* Channel 8 */
 317         CHAN2G(2452), /* Channel 9 */
 318         CHAN2G(2457), /* Channel 10 */
 319         CHAN2G(2462), /* Channel 11 */
 320         CHAN2G(2467), /* Channel 12 */
 321         CHAN2G(2472), /* Channel 13 */
 322         CHAN2G(2484), /* Channel 14 */
 323 };
 324
 325 static const struct ieee80211_channel hwsim_channels_5ghz[] = {
 326         CHAN5G(5180), /* Channel 36 */
 327         CHAN5G(5200), /* Channel 40 */
 328         CHAN5G(5220), /* Channel 44 */
 329         CHAN5G(5240), /* Channel 48 */
 330
 331         CHAN5G(5260), /* Channel 52 */
 332         CHAN5G(5280), /* Channel 56 */
 333         CHAN5G(5300), /* Channel 60 */
 334         CHAN5G(5320), /* Channel 64 */
 335
 336         CHAN5G(5500), /* Channel 100 */
 337         CHAN5G(5520), /* Channel 104 */
 338         CHAN5G(5540), /* Channel 108 */
 339         CHAN5G(5560), /* Channel 112 */
 340         CHAN5G(5580), /* Channel 116 */
 341         CHAN5G(5600), /* Channel 120 */
 342         CHAN5G(5620), /* Channel 124 */
 343         CHAN5G(5640), /* Channel 128 */
 344         CHAN5G(5660), /* Channel 132 */
 345         CHAN5G(5680), /* Channel 136 */
 346         CHAN5G(5700), /* Channel 140 */
 347
 348         CHAN5G(5745), /* Channel 149 */
 349         CHAN5G(5765), /* Channel 153 */
 350         CHAN5G(5785), /* Channel 157 */
 351         CHAN5G(5805), /* Channel 161 */
 352         CHAN5G(5825), /* Channel 165 */
 353         CHAN5G(5845), /* Channel 169 */
 354 };
 355
 356 static const struct ieee80211_rate hwsim_rates[] = {
 357         { .bitrate = 10 },
 358         { .bitrate = 20, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
 359         { .bitrate = 55, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
 360         { .bitrate = 110, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
 361         { .bitrate = 60 },
 362         { .bitrate = 90 },
 363         { .bitrate = 120 },
 364         { .bitrate = 180 },
 365         { .bitrate = 240 },
 366         { .bitrate = 360 },
 367         { .bitrate = 480 },
 368         { .bitrate = 540 }
 369 };
 370
 371 #define OUI_QCA 0x001374
 372 #define QCA_NL80211_SUBCMD_TEST 1
 373 enum qca_nl80211_vendor_subcmds {
 374         QCA_WLAN_VENDOR_ATTR_TEST = 8,
 375         QCA_WLAN_VENDOR_ATTR_MAX = QCA_WLAN_VENDOR_ATTR_TEST
 376 };
 377
 378 static const struct nla_policy
 379 hwsim_vendor_test_policy[QCA_WLAN_VENDOR_ATTR_MAX + 1] = {
 380         [QCA_WLAN_VENDOR_ATTR_MAX] = { .type = NLA_U32 },
 381 };
 382
 383 static int mac80211_hwsim_vendor_cmd_test(struct wiphy *wiphy,
 384                                           struct wireless_dev *wdev,
 385                                           const void *data, int data_len)
 386 {
 387         struct sk_buff *skb;
 388         struct nlattr *tb[QCA_WLAN_VENDOR_ATTR_MAX + 1];
 389         int err;
 390         u32 val;
 391
 392         err = nla_parse(tb, QCA_WLAN_VENDOR_ATTR_MAX, data, data_len,
 393                         hwsim_vendor_test_policy, NULL);
 394         if (err)
 395                 return err;
 396         if (!tb[QCA_WLAN_VENDOR_ATTR_TEST])
 397                 return -EINVAL;
 398         val = nla_get_u32(tb[QCA_WLAN_VENDOR_ATTR_TEST]);
 399         wiphy_dbg(wiphy, "%s: test=%u\n", __func__, val);
 400
 401         /* Send a vendor event as a test. Note that this would not normally be
 402          * done within a command handler, but rather, based on some other
 403          * trigger. For simplicity, this command is used to trigger the event
 404          * here.
 405          *
 406          * event_idx = 0 (index in mac80211_hwsim_vendor_commands)
 407          */
 408         skb = cfg80211_vendor_event_alloc(wiphy, wdev, 100, 0, GFP_KERNEL);
 409         if (skb) {
 410                 /* skb_put() or nla_put() will fill up data within
 411                  * NL80211_ATTR_VENDOR_DATA.
 412                  */
 413
 414                 /* Add vendor data */
 415                 nla_put_u32(skb, QCA_WLAN_VENDOR_ATTR_TEST, val + 1);
 416
 417                 /* Send the event - this will call nla_nest_end() */
 418                 cfg80211_vendor_event(skb, GFP_KERNEL);
 419         }
 420
 421         /* Send a response to the command */
 422         skb = cfg80211_vendor_cmd_alloc_reply_skb(wiphy, 10);
 423         if (!skb)
 424                 return -ENOMEM;
 425
 426         /* skb_put() or nla_put() will fill up data within
 427          * NL80211_ATTR_VENDOR_DATA
 428          */
 429         nla_put_u32(skb, QCA_WLAN_VENDOR_ATTR_TEST, val + 2);
 430
 431         return cfg80211_vendor_cmd_reply(skb);
 432 }
 433
 434 static struct wiphy_vendor_command mac80211_hwsim_vendor_commands[] = {
 435         {
 436                 .info = { .vendor_id = OUI_QCA,
 437                           .subcmd = QCA_NL80211_SUBCMD_TEST },
 438                 .flags = WIPHY_VENDOR_CMD_NEED_NETDEV,
 439                 .doit = mac80211_hwsim_vendor_cmd_test,
 440         }
 441 };
 442
 443 /* Advertise support vendor specific events */
 444 static const struct nl80211_vendor_cmd_info mac80211_hwsim_vendor_events[] = {
 445         { .vendor_id = OUI_QCA, .subcmd = 1 },
 446 };
 447
 448 static const struct ieee80211_iface_limit hwsim_if_limits[] = {
 449         { .max = 1, .types = BIT(NL80211_IFTYPE_ADHOC) },
 450         { .max = 2048,  .types = BIT(NL80211_IFTYPE_STATION) |
 451                                  BIT(NL80211_IFTYPE_P2P_CLIENT) |
 452 #ifdef CONFIG_MAC80211_MESH
 453                                  BIT(NL80211_IFTYPE_MESH_POINT) |
 454 #endif
 455                                  BIT(NL80211_IFTYPE_AP) |
 456                                  BIT(NL80211_IFTYPE_P2P_GO) },
 457         /* must be last, see hwsim_if_comb */
 458         { .max = 1, .types = BIT(NL80211_IFTYPE_P2P_DEVICE) }
 459 };
 460
 461 static const struct ieee80211_iface_combination hwsim_if_comb[] = {
 462         {
 463                 .limits = hwsim_if_limits,
 464                 /* remove the last entry which is P2P_DEVICE */
 465                 .n_limits = ARRAY_SIZE(hwsim_if_limits) - 1,
 466                 .max_interfaces = 2048,
 467                 .num_different_channels = 1,
 468                 .radar_detect_widths = BIT(NL80211_CHAN_WIDTH_20_NOHT) |
 469                                        BIT(NL80211_CHAN_WIDTH_20) |
 470                                        BIT(NL80211_CHAN_WIDTH_40) |
 471                                        BIT(NL80211_CHAN_WIDTH_80) |
 472                                        BIT(NL80211_CHAN_WIDTH_160),
 473         },
 474 };
 475
 476 static const struct ieee80211_iface_combination hwsim_if_comb_p2p_dev[] = {
 477         {
 478                 .limits = hwsim_if_limits,
 479                 .n_limits = ARRAY_SIZE(hwsim_if_limits),
 480                 .max_interfaces = 2048,
 481                 .num_different_channels = 1,
 482                 .radar_detect_widths = BIT(NL80211_CHAN_WIDTH_20_NOHT) |
 483                                        BIT(NL80211_CHAN_WIDTH_20) |
 484                                        BIT(NL80211_CHAN_WIDTH_40) |
 485                                        BIT(NL80211_CHAN_WIDTH_80) |
 486                                        BIT(NL80211_CHAN_WIDTH_160),
 487         },
 488 };
 489
 490 static spinlock_t hwsim_radio_lock;
 491 static LIST_HEAD(hwsim_radios);
 492 static int hwsim_radio_idx;
 493
 494 static struct platform_driver mac80211_hwsim_driver = {
 495         .driver = {
 496                 .name = "mac80211_hwsim",
 497         },
 498 };
 499
 500 struct mac80211_hwsim_data {
 501         struct list_head list;
 502         struct ieee80211_hw *hw;
 503         struct device *dev;
 504         struct ieee80211_supported_band bands[NUM_NL80211_BANDS];
 505         struct ieee80211_channel channels_2ghz[ARRAY_SIZE(hwsim_channels_2ghz)];
 506         struct ieee80211_channel channels_5ghz[ARRAY_SIZE(hwsim_channels_5ghz)];
 507         struct ieee80211_rate rates[ARRAY_SIZE(hwsim_rates)];
 508         struct ieee80211_iface_combination if_combination;
 509
 510         struct mac_address addresses[2];
 511         int channels, idx;
 512         bool use_chanctx;
 513         bool destroy_on_close;
 514         struct work_struct destroy_work;
 515         u32 portid;
 516         char alpha2[2];
 517         const struct ieee80211_regdomain *regd;
 518
 519         struct ieee80211_channel *tmp_chan;
 520         struct ieee80211_channel *roc_chan;
 521         u32 roc_duration;
 522         struct delayed_work roc_start;
 523         struct delayed_work roc_done;
 524         struct delayed_work hw_scan;
 525         struct cfg80211_scan_request *hw_scan_request;
 526         struct ieee80211_vif *hw_scan_vif;
 527         int scan_chan_idx;
 528         u8 scan_addr[ETH_ALEN];
 529         struct {
 530                 struct ieee80211_channel *channel;
 531                 unsigned long next_start, start, end;
 532         } survey_data[ARRAY_SIZE(hwsim_channels_2ghz) +
 533                       ARRAY_SIZE(hwsim_channels_5ghz)];
 534
 535         struct ieee80211_channel *channel;
 536         u64 beacon_int  /* beacon interval in us */;
 537         unsigned int rx_filter;
 538         bool started, idle, scanning;
 539         struct mutex mutex;
 540         struct tasklet_hrtimer beacon_timer;
 541         enum ps_mode {
 542                 PS_DISABLED, PS_ENABLED, PS_AUTO_POLL, PS_MANUAL_POLL
 543         } ps;
 544         bool ps_poll_pending;
 545         struct dentry *debugfs;
 546
 547         uintptr_t pending_cookie;
 548         struct sk_buff_head pending;    /* packets pending */
 549         /*
 550          * Only radios in the same group can communicate together (the
 551          * channel has to match too). Each bit represents a group. A
 552          * radio can be in more than one group.
 553          */
 554         u64 group;
 555
 556         /* group shared by radios created in the same netns */
 557         int netgroup;
 558         /* wmediumd portid responsible for netgroup of this radio */
 559         u32 wmediumd;
 560
 561         /* difference between this hw's clock and the real clock, in usecs */
 562         s64 tsf_offset;
 563         s64 bcn_delta;
 564         /* absolute beacon transmission time. Used to cover up "tx" delay. */
 565         u64 abs_bcn_ts;
 566
 567         /* Stats */
 568         u64 tx_pkts;
 569         u64 rx_pkts;
 570         u64 tx_bytes;
 571         u64 rx_bytes;
 572         u64 tx_dropped;
 573         u64 tx_failed;
 574 };
 575
 576
 577 struct hwsim_radiotap_hdr {
 578         struct ieee80211_radiotap_header hdr;
 579         __le64 rt_tsft;
 580         u8 rt_flags;
 581         u8 rt_rate;
 582         __le16 rt_channel;
 583         __le16 rt_chbitmask;
 584 } __packed;
 585
 586 struct hwsim_radiotap_ack_hdr {
 587         struct ieee80211_radiotap_header hdr;
 588         u8 rt_flags;
 589         u8 pad;
 590         __le16 rt_channel;
 591         __le16 rt_chbitmask;
 592 } __packed;
 593
 594 /* MAC80211_HWSIM netlink family */
 595 static struct genl_family hwsim_genl_family;
 596
 597 enum hwsim_multicast_groups {
 598         HWSIM_MCGRP_CONFIG,
 599 };
 600
 601 static const struct genl_multicast_group hwsim_mcgrps[] = {
 602         [HWSIM_MCGRP_CONFIG] = { .name = "config", },
 603 };
 604
 605 /* MAC80211_HWSIM netlink policy */
 606
 607 static const struct nla_policy hwsim_genl_policy[HWSIM_ATTR_MAX + 1] = {
 608         [HWSIM_ATTR_ADDR_RECEIVER] = { .type = NLA_UNSPEC, .len = ETH_ALEN },
 609         [HWSIM_ATTR_ADDR_TRANSMITTER] = { .type = NLA_UNSPEC, .len = ETH_ALEN },
 610         [HWSIM_ATTR_FRAME] = { .type = NLA_BINARY,
 611                                .len = IEEE80211_MAX_DATA_LEN },
 612         [HWSIM_ATTR_FLAGS] = { .type = NLA_U32 },
 613         [HWSIM_ATTR_RX_RATE] = { .type = NLA_U32 },
 614         [HWSIM_ATTR_SIGNAL] = { .type = NLA_U32 },
 615         [HWSIM_ATTR_TX_INFO] = { .type = NLA_UNSPEC,
 616                                  .len = IEEE80211_TX_MAX_RATES *
 617                                         sizeof(struct hwsim_tx_rate)},
 618         [HWSIM_ATTR_COOKIE] = { .type = NLA_U64 },
 619         [HWSIM_ATTR_CHANNELS] = { .type = NLA_U32 },
 620         [HWSIM_ATTR_RADIO_ID] = { .type = NLA_U32 },
 621         [HWSIM_ATTR_REG_HINT_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 622         [HWSIM_ATTR_REG_CUSTOM_REG] = { .type = NLA_U32 },
 623         [HWSIM_ATTR_REG_STRICT_REG] = { .type = NLA_FLAG },
 624         [HWSIM_ATTR_SUPPORT_P2P_DEVICE] = { .type = NLA_FLAG },
 625         [HWSIM_ATTR_DESTROY_RADIO_ON_CLOSE] = { .type = NLA_FLAG },
 626         [HWSIM_ATTR_RADIO_NAME] = { .type = NLA_STRING },
 627         [HWSIM_ATTR_NO_VIF] = { .type = NLA_FLAG },
 628         [HWSIM_ATTR_FREQ] = { .type = NLA_U32 },
 629 };
 630
 631 static void mac80211_hwsim_tx_frame(struct ieee80211_hw *hw,
 632                                     struct sk_buff *skb,
 633                                     struct ieee80211_channel *chan);
 634
 635 /* sysfs attributes */
 636 static void hwsim_send_ps_poll(void *dat, u8 *mac, struct ieee80211_vif *vif)
 637 {
 638         struct mac80211_hwsim_data *data = dat;
 639         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 640         struct sk_buff *skb;
 641         struct ieee80211_pspoll *pspoll;
 642
 643         if (!vp->assoc)
 644                 return;
 645
 646         wiphy_dbg(data->hw->wiphy,
 647                   "%s: send PS-Poll to %pM for aid %d\n",
 648                   __func__, vp->bssid, vp->aid);
 649
 650         skb = dev_alloc_skb(sizeof(*pspoll));
 651         if (!skb)
 652                 return;
 653         pspoll = skb_put(skb, sizeof(*pspoll));
 654         pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
 655                                             IEEE80211_STYPE_PSPOLL |
 656                                             IEEE80211_FCTL_PM);
 657         pspoll->aid = cpu_to_le16(0xc000 | vp->aid);
 658         memcpy(pspoll->bssid, vp->bssid, ETH_ALEN);
 659         memcpy(pspoll->ta, mac, ETH_ALEN);
 660
 661         rcu_read_lock();
 662         mac80211_hwsim_tx_frame(data->hw, skb,
 663                                 rcu_dereference(vif->chanctx_conf)->def.chan);
 664         rcu_read_unlock();
 665 }
 666
 667 static void hwsim_send_nullfunc(struct mac80211_hwsim_data *data, u8 *mac,
 668                                 struct ieee80211_vif *vif, int ps)
 669 {
 670         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 671         struct sk_buff *skb;
 672         struct ieee80211_hdr *hdr;
 673
 674         if (!vp->assoc)
 675                 return;
 676
 677         wiphy_dbg(data->hw->wiphy,
 678                   "%s: send data::nullfunc to %pM ps=%d\n",
 679                   __func__, vp->bssid, ps);
 680
 681         skb = dev_alloc_skb(sizeof(*hdr));
 682         if (!skb)
 683                 return;
 684         hdr = skb_put(skb, sizeof(*hdr) - ETH_ALEN);
 685         hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
 686                                          IEEE80211_STYPE_NULLFUNC |
 687                                          (ps ? IEEE80211_FCTL_PM : 0));
 688         hdr->duration_id = cpu_to_le16(0);
 689         memcpy(hdr->addr1, vp->bssid, ETH_ALEN);
 690         memcpy(hdr->addr2, mac, ETH_ALEN);
 691         memcpy(hdr->addr3, vp->bssid, ETH_ALEN);
 692
 693         rcu_read_lock();
 694         mac80211_hwsim_tx_frame(data->hw, skb,
 695                                 rcu_dereference(vif->chanctx_conf)->def.chan);
 696         rcu_read_unlock();
 697 }
 698
 699
 700 static void hwsim_send_nullfunc_ps(void *dat, u8 *mac,
 701                                    struct ieee80211_vif *vif)
 702 {
 703         struct mac80211_hwsim_data *data = dat;
 704         hwsim_send_nullfunc(data, mac, vif, 1);
 705 }
 706
 707 static void hwsim_send_nullfunc_no_ps(void *dat, u8 *mac,
 708                                       struct ieee80211_vif *vif)
 709 {
 710         struct mac80211_hwsim_data *data = dat;
 711         hwsim_send_nullfunc(data, mac, vif, 0);
 712 }
 713
 714 static int hwsim_fops_ps_read(void *dat, u64 *val)
 715 {
 716         struct mac80211_hwsim_data *data = dat;
 717         *val = data->ps;
 718         return 0;
 719 }
 720
 721 static int hwsim_fops_ps_write(void *dat, u64 val)
 722 {
 723         struct mac80211_hwsim_data *data = dat;
 724         enum ps_mode old_ps;
 725
 726         if (val != PS_DISABLED && val != PS_ENABLED && val != PS_AUTO_POLL &&
 727             val != PS_MANUAL_POLL)
 728                 return -EINVAL;
 729
 730         old_ps = data->ps;
 731         data->ps = val;
 732
 733         local_bh_disable();
 734         if (val == PS_MANUAL_POLL) {
 735                 ieee80211_iterate_active_interfaces_atomic(
 736                         data->hw, IEEE80211_IFACE_ITER_NORMAL,
 737                         hwsim_send_ps_poll, data);
 738                 data->ps_poll_pending = true;
 739         } else if (old_ps == PS_DISABLED && val != PS_DISABLED) {
 740                 ieee80211_iterate_active_interfaces_atomic(
 741                         data->hw, IEEE80211_IFACE_ITER_NORMAL,
 742                         hwsim_send_nullfunc_ps, data);
 743         } else if (old_ps != PS_DISABLED && val == PS_DISABLED) {
 744                 ieee80211_iterate_active_interfaces_atomic(
 745                         data->hw, IEEE80211_IFACE_ITER_NORMAL,
 746                         hwsim_send_nullfunc_no_ps, data);
 747         }
 748         local_bh_enable();
 749
 750         return 0;
 751 }
 752
 753 DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_ps, hwsim_fops_ps_read, hwsim_fops_ps_write,
 754                         "%llu\n");
 755
 756 static int hwsim_write_simulate_radar(void *dat, u64 val)
 757 {
 758         struct mac80211_hwsim_data *data = dat;
 759
 760         ieee80211_radar_detected(data->hw);
 761
 762         return 0;
 763 }
 764
 765 DEFINE_SIMPLE_ATTRIBUTE(hwsim_simulate_radar, NULL,
 766                         hwsim_write_simulate_radar, "%llu\n");
 767
 768 static int hwsim_fops_group_read(void *dat, u64 *val)
 769 {
 770         struct mac80211_hwsim_data *data = dat;
 771         *val = data->group;
 772         return 0;
 773 }
 774
 775 static int hwsim_fops_group_write(void *dat, u64 val)
 776 {
 777         struct mac80211_hwsim_data *data = dat;
 778         data->group = val;
 779         return 0;
 780 }
 781
 782 DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_group,
 783                         hwsim_fops_group_read, hwsim_fops_group_write,
 784                         "%llx\n");
 785
 786 static netdev_tx_t hwsim_mon_xmit(struct sk_buff *skb,
 787                                         struct net_device *dev)
 788 {
 789         /* TODO: allow packet injection */
 790         dev_kfree_skb(skb);
 791         return NETDEV_TX_OK;
 792 }
 793
 794 static inline u64 mac80211_hwsim_get_tsf_raw(void)
 795 {
 796         return ktime_to_us(ktime_get_real());
 797 }
 798
 799 static __le64 __mac80211_hwsim_get_tsf(struct mac80211_hwsim_data *data)
 800 {
 801         u64 now = mac80211_hwsim_get_tsf_raw();
 802         return cpu_to_le64(now + data->tsf_offset);
 803 }
 804
 805 static u64 mac80211_hwsim_get_tsf(struct ieee80211_hw *hw,
 806                                   struct ieee80211_vif *vif)
 807 {
 808         struct mac80211_hwsim_data *data = hw->priv;
 809         return le64_to_cpu(__mac80211_hwsim_get_tsf(data));
 810 }
 811
 812 static void mac80211_hwsim_set_tsf(struct ieee80211_hw *hw,
 813                 struct ieee80211_vif *vif, u64 tsf)
 814 {
 815         struct mac80211_hwsim_data *data = hw->priv;
 816         u64 now = mac80211_hwsim_get_tsf(hw, vif);
 817         u32 bcn_int = data->beacon_int;
 818         u64 delta = abs(tsf - now);
 819
 820         /* adjust after beaconing with new timestamp at old TBTT */
 821         if (tsf > now) {
 822                 data->tsf_offset += delta;
 823                 data->bcn_delta = do_div(delta, bcn_int);
 824         } else {
 825                 data->tsf_offset -= delta;
 826                 data->bcn_delta = -(s64)do_div(delta, bcn_int);
 827         }
 828 }
 829
 830 static void mac80211_hwsim_monitor_rx(struct ieee80211_hw *hw,
 831                                       struct sk_buff *tx_skb,
 832                                       struct ieee80211_channel *chan)
 833 {
 834         struct mac80211_hwsim_data *data = hw->priv;
 835         struct sk_buff *skb;
 836         struct hwsim_radiotap_hdr *hdr;
 837         u16 flags;
 838         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_skb);
 839         struct ieee80211_rate *txrate = ieee80211_get_tx_rate(hw, info);
 840
 841         if (WARN_ON(!txrate))
 842                 return;
 843
 844         if (!netif_running(hwsim_mon))
 845                 return;
 846
 847         skb = skb_copy_expand(tx_skb, sizeof(*hdr), 0, GFP_ATOMIC);
 848         if (skb == NULL)
 849                 return;
 850
 851         hdr = skb_push(skb, sizeof(*hdr));
 852         hdr->hdr.it_version = PKTHDR_RADIOTAP_VERSION;
 853         hdr->hdr.it_pad = 0;
 854         hdr->hdr.it_len = cpu_to_le16(sizeof(*hdr));
 855         hdr->hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
 856                                           (1 << IEEE80211_RADIOTAP_RATE) |
 857                                           (1 << IEEE80211_RADIOTAP_TSFT) |
 858                                           (1 << IEEE80211_RADIOTAP_CHANNEL));
 859         hdr->rt_tsft = __mac80211_hwsim_get_tsf(data);
 860         hdr->rt_flags = 0;
 861         hdr->rt_rate = txrate->bitrate / 5;
 862         hdr->rt_channel = cpu_to_le16(chan->center_freq);
 863         flags = IEEE80211_CHAN_2GHZ;
 864         if (txrate->flags & IEEE80211_RATE_ERP_G)
 865                 flags |= IEEE80211_CHAN_OFDM;
 866         else
 867                 flags |= IEEE80211_CHAN_CCK;
 868         hdr->rt_chbitmask = cpu_to_le16(flags);
 869
 870         skb->dev = hwsim_mon;
 871         skb_reset_mac_header(skb);
 872         skb->ip_summed = CHECKSUM_UNNECESSARY;
 873         skb->pkt_type = PACKET_OTHERHOST;
 874         skb->protocol = htons(ETH_P_802_2);
 875         memset(skb->cb, 0, sizeof(skb->cb));
 876         netif_rx(skb);
 877 }
 878
 879
 880 static void mac80211_hwsim_monitor_ack(struct ieee80211_channel *chan,
 881                                        const u8 *addr)
 882 {
 883         struct sk_buff *skb;
 884         struct hwsim_radiotap_ack_hdr *hdr;
 885         u16 flags;
 886         struct ieee80211_hdr *hdr11;
 887
 888         if (!netif_running(hwsim_mon))
 889                 return;
 890
 891         skb = dev_alloc_skb(100);
 892         if (skb == NULL)
 893                 return;
 894
 895         hdr = skb_put(skb, sizeof(*hdr));
 896         hdr->hdr.it_version = PKTHDR_RADIOTAP_VERSION;
 897         hdr->hdr.it_pad = 0;
 898         hdr->hdr.it_len = cpu_to_le16(sizeof(*hdr));
 899         hdr->hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
 900                                           (1 << IEEE80211_RADIOTAP_CHANNEL));
 901         hdr->rt_flags = 0;
 902         hdr->pad = 0;
 903         hdr->rt_channel = cpu_to_le16(chan->center_freq);
 904         flags = IEEE80211_CHAN_2GHZ;
 905         hdr->rt_chbitmask = cpu_to_le16(flags);
 906
 907         hdr11 = skb_put(skb, 10);
 908         hdr11->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
 909                                            IEEE80211_STYPE_ACK);
 910         hdr11->duration_id = cpu_to_le16(0);
 911         memcpy(hdr11->addr1, addr, ETH_ALEN);
 912
 913         skb->dev = hwsim_mon;
 914         skb_reset_mac_header(skb);
 915         skb->ip_summed = CHECKSUM_UNNECESSARY;
 916         skb->pkt_type = PACKET_OTHERHOST;
 917         skb->protocol = htons(ETH_P_802_2);
 918         memset(skb->cb, 0, sizeof(skb->cb));
 919         netif_rx(skb);
 920 }
 921
 922 struct mac80211_hwsim_addr_match_data {
 923         u8 addr[ETH_ALEN];
 924         bool ret;
 925 };
 926
 927 static void mac80211_hwsim_addr_iter(void *data, u8 *mac,
 928                                      struct ieee80211_vif *vif)
 929 {
 930         struct mac80211_hwsim_addr_match_data *md = data;
 931
 932         if (memcmp(mac, md->addr, ETH_ALEN) == 0)
 933                 md->ret = true;
 934 }
 935
 936 static bool mac80211_hwsim_addr_match(struct mac80211_hwsim_data *data,
 937                                       const u8 *addr)
 938 {
 939         struct mac80211_hwsim_addr_match_data md = {
 940                 .ret = false,
 941         };
 942
 943         if (data->scanning && memcmp(addr, data->scan_addr, ETH_ALEN) == 0)
 944                 return true;
 945
 946         memcpy(md.addr, addr, ETH_ALEN);
 947
 948         ieee80211_iterate_active_interfaces_atomic(data->hw,
 949                                                    IEEE80211_IFACE_ITER_NORMAL,
 950                                                    mac80211_hwsim_addr_iter,
 951                                                    &md);
 952
 953         return md.ret;
 954 }
 955
 956 static bool hwsim_ps_rx_ok(struct mac80211_hwsim_data *data,
 957                            struct sk_buff *skb)
 958 {
 959         switch (data->ps) {
 960         case PS_DISABLED:
 961                 return true;
 962         case PS_ENABLED:
 963                 return false;
 964         case PS_AUTO_POLL:
 965                 /* TODO: accept (some) Beacons by default and other frames only
 966                  * if pending PS-Poll has been sent */
 967                 return true;
 968         case PS_MANUAL_POLL:
 969                 /* Allow unicast frames to own address if there is a pending
 970                  * PS-Poll */
 971                 if (data->ps_poll_pending &&
 972                     mac80211_hwsim_addr_match(data, skb->data + 4)) {
 973                         data->ps_poll_pending = false;
 974                         return true;
 975                 }
 976                 return false;
 977         }
 978
 979         return true;
 980 }
 981
 982 static int hwsim_unicast_netgroup(struct mac80211_hwsim_data *data,
 983                                   struct sk_buff *skb, int portid)
 984 {
 985         struct net *net;
 986         bool found = false;
 987         int res = -ENOENT;
 988
 989         rcu_read_lock();
 990         for_each_net_rcu(net) {
 991                 if (data->netgroup == hwsim_net_get_netgroup(net)) {
 992                         res = genlmsg_unicast(net, skb, portid);
 993                         found = true;
 994                         break;
 995                 }
 996         }
 997         rcu_read_unlock();
 998
 999         if (!found)
1000                 nlmsg_free(skb);
1001
1002         return res;
1003 }
1004
1005 static void mac80211_hwsim_tx_frame_nl(struct ieee80211_hw *hw,
1006                                        struct sk_buff *my_skb,
1007                                        int dst_portid)
1008 {
1009         struct sk_buff *skb;
1010         struct mac80211_hwsim_data *data = hw->priv;
1011         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) my_skb->data;
1012         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(my_skb);
1013         void *msg_head;
1014         unsigned int hwsim_flags = 0;
1015         int i;
1016         struct hwsim_tx_rate tx_attempts[IEEE80211_TX_MAX_RATES];
1017         uintptr_t cookie;
1018
1019         if (data->ps != PS_DISABLED)
1020                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1021         /* If the queue contains MAX_QUEUE skb's drop some */
1022         if (skb_queue_len(&data->pending) >= MAX_QUEUE) {
1023                 /* Droping until WARN_QUEUE level */
1024                 while (skb_queue_len(&data->pending) >= WARN_QUEUE) {
1025                         ieee80211_free_txskb(hw, skb_dequeue(&data->pending));
1026                         data->tx_dropped++;
1027                 }
1028         }
1029
1030         skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1031         if (skb == NULL)
1032                 goto nla_put_failure;
1033
1034         msg_head = genlmsg_put(skb, 0, 0, &hwsim_genl_family, 0,
1035                                HWSIM_CMD_FRAME);
1036         if (msg_head == NULL) {
1037                 pr_debug("mac80211_hwsim: problem with msg_head\n");
1038                 goto nla_put_failure;
1039         }
1040
1041         if (nla_put(skb, HWSIM_ATTR_ADDR_TRANSMITTER,
1042                     ETH_ALEN, data->addresses[1].addr))
1043                 goto nla_put_failure;
1044
1045         /* We get the skb->data */
1046         if (nla_put(skb, HWSIM_ATTR_FRAME, my_skb->len, my_skb->data))
1047                 goto nla_put_failure;
1048
1049         /* We get the flags for this transmission, and we translate them to
1050            wmediumd flags  */
1051
1052         if (info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS)
1053                 hwsim_flags |= HWSIM_TX_CTL_REQ_TX_STATUS;
1054
1055         if (info->flags & IEEE80211_TX_CTL_NO_ACK)
1056                 hwsim_flags |= HWSIM_TX_CTL_NO_ACK;
1057
1058         if (nla_put_u32(skb, HWSIM_ATTR_FLAGS, hwsim_flags))
1059                 goto nla_put_failure;
1060
1061         if (nla_put_u32(skb, HWSIM_ATTR_FREQ, data->channel->center_freq))
1062                 goto nla_put_failure;
1063
1064         /* We get the tx control (rate and retries) info*/
1065
1066         for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
1067                 tx_attempts[i].idx = info->status.rates[i].idx;
1068                 tx_attempts[i].count = info->status.rates[i].count;
1069         }
1070
1071         if (nla_put(skb, HWSIM_ATTR_TX_INFO,
1072                     sizeof(struct hwsim_tx_rate)*IEEE80211_TX_MAX_RATES,
1073                     tx_attempts))
1074                 goto nla_put_failure;
1075
1076         /* We create a cookie to identify this skb */
1077         data->pending_cookie++;
1078         cookie = data->pending_cookie;
1079         info->rate_driver_data[0] = (void *)cookie;
1080         if (nla_put_u64_64bit(skb, HWSIM_ATTR_COOKIE, cookie, HWSIM_ATTR_PAD))
1081                 goto nla_put_failure;
1082
1083         genlmsg_end(skb, msg_head);
1084         if (hwsim_unicast_netgroup(data, skb, dst_portid))
1085                 goto err_free_txskb;
1086
1087         /* Enqueue the packet */
1088         skb_queue_tail(&data->pending, my_skb);
1089         data->tx_pkts++;
1090         data->tx_bytes += my_skb->len;
1091         return;
1092
1093 nla_put_failure:
1094         nlmsg_free(skb);
1095 err_free_txskb:
1096         pr_debug("mac80211_hwsim: error occurred in %s\n", __func__);
1097         ieee80211_free_txskb(hw, my_skb);
1098         data->tx_failed++;
1099 }
1100
1101 static bool hwsim_chans_compat(struct ieee80211_channel *c1,
1102                                struct ieee80211_channel *c2)
1103 {
1104         if (!c1 || !c2)
1105                 return false;
1106
1107         return c1->center_freq == c2->center_freq;
1108 }
1109
1110 struct tx_iter_data {
1111         struct ieee80211_channel *channel;
1112         bool receive;
1113 };
1114
1115 static void mac80211_hwsim_tx_iter(void *_data, u8 *addr,
1116                                    struct ieee80211_vif *vif)
1117 {
1118         struct tx_iter_data *data = _data;
1119
1120         if (!vif->chanctx_conf)
1121                 return;
1122
1123         if (!hwsim_chans_compat(data->channel,
1124                                 rcu_dereference(vif->chanctx_conf)->def.chan))
1125                 return;
1126
1127         data->receive = true;
1128 }
1129
1130 static void mac80211_hwsim_add_vendor_rtap(struct sk_buff *skb)
1131 {
1132         /*
1133          * To enable this code, #define the HWSIM_RADIOTAP_OUI,
1134          * e.g. like this:
1135          * #define HWSIM_RADIOTAP_OUI "\x02\x00\x00"
1136          * (but you should use a valid OUI, not that)
1137          *
1138          * If anyone wants to 'donate' a radiotap OUI/subns code
1139          * please send a patch removing this #ifdef and changing
1140          * the values accordingly.
1141          */
1142 #ifdef HWSIM_RADIOTAP_OUI
1143         struct ieee80211_vendor_radiotap *rtap;
1144
1145         /*
1146          * Note that this code requires the headroom in the SKB
1147          * that was allocated earlier.
1148          */
1149         rtap = skb_push(skb, sizeof(*rtap) + 8 + 4);
1150         rtap->oui[0] = HWSIM_RADIOTAP_OUI[0];
1151         rtap->oui[1] = HWSIM_RADIOTAP_OUI[1];
1152         rtap->oui[2] = HWSIM_RADIOTAP_OUI[2];
1153         rtap->subns = 127;
1154
1155         /*
1156          * Radiotap vendor namespaces can (and should) also be
1157          * split into fields by using the standard radiotap
1158          * presence bitmap mechanism. Use just BIT(0) here for
1159          * the presence bitmap.
1160          */
1161         rtap->present = BIT(0);
1162         /* We have 8 bytes of (dummy) data */
1163         rtap->len = 8;
1164         /* For testing, also require it to be aligned */
1165         rtap->align = 8;
1166         /* And also test that padding works, 4 bytes */
1167         rtap->pad = 4;
1168         /* push the data */
1169         memcpy(rtap->data, "ABCDEFGH", 8);
1170         /* make sure to clear padding, mac80211 doesn't */
1171         memset(rtap->data + 8, 0, 4);
1172
1173         IEEE80211_SKB_RXCB(skb)->flag |= RX_FLAG_RADIOTAP_VENDOR_DATA;
1174 #endif
1175 }
1176
1177 static bool mac80211_hwsim_tx_frame_no_nl(struct ieee80211_hw *hw,
1178                                           struct sk_buff *skb,
1179                                           struct ieee80211_channel *chan)
1180 {
1181         struct mac80211_hwsim_data *data = hw->priv, *data2;
1182         bool ack = false;
1183         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1184         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1185         struct ieee80211_rx_status rx_status;
1186         u64 now;
1187
1188         memset(&rx_status, 0, sizeof(rx_status));
1189         rx_status.flag |= RX_FLAG_MACTIME_START;
1190         rx_status.freq = chan->center_freq;
1191         rx_status.band = chan->band;
1192         if (info->control.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) {
1193                 rx_status.rate_idx =
1194                         ieee80211_rate_get_vht_mcs(&info->control.rates[0]);
1195                 rx_status.nss =
1196                         ieee80211_rate_get_vht_nss(&info->control.rates[0]);
1197                 rx_status.encoding = RX_ENC_VHT;
1198         } else {
1199                 rx_status.rate_idx = info->control.rates[0].idx;
1200                 if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS)
1201                         rx_status.encoding = RX_ENC_HT;
1202         }
1203         if (info->control.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
1204                 rx_status.bw = RATE_INFO_BW_40;
1205         else if (info->control.rates[0].flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
1206                 rx_status.bw = RATE_INFO_BW_80;
1207         else if (info->control.rates[0].flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
1208                 rx_status.bw = RATE_INFO_BW_160;
1209         else
1210                 rx_status.bw = RATE_INFO_BW_20;
1211         if (info->control.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
1212                 rx_status.enc_flags |= RX_ENC_FLAG_SHORT_GI;
1213         /* TODO: simulate real signal strength (and optional packet loss) */
1214         rx_status.signal = -50;
1215         if (info->control.vif)
1216                 rx_status.signal += info->control.vif->bss_conf.txpower;
1217
1218         if (data->ps != PS_DISABLED)
1219                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1220
1221         /* release the skb's source info */
1222         skb_orphan(skb);
1223         skb_dst_drop(skb);
1224         skb->mark = 0;
1225         secpath_reset(skb);
1226         nf_reset(skb);
1227
1228         /*
1229          * Get absolute mactime here so all HWs RX at the "same time", and
1230          * absolute TX time for beacon mactime so the timestamp matches.
1231          * Giving beacons a different mactime than non-beacons looks messy, but
1232          * it helps the Toffset be exact and a ~10us mactime discrepancy
1233          * probably doesn't really matter.
1234          */
1235         if (ieee80211_is_beacon(hdr->frame_control) ||
1236             ieee80211_is_probe_resp(hdr->frame_control))
1237                 now = data->abs_bcn_ts;
1238         else
1239                 now = mac80211_hwsim_get_tsf_raw();
1240
1241         /* Copy skb to all enabled radios that are on the current frequency */
1242         spin_lock(&hwsim_radio_lock);
1243         list_for_each_entry(data2, &hwsim_radios, list) {
1244                 struct sk_buff *nskb;
1245                 struct tx_iter_data tx_iter_data = {
1246                         .receive = false,
1247                         .channel = chan,
1248                 };
1249
1250                 if (data == data2)
1251                         continue;
1252
1253                 if (!data2->started || (data2->idle && !data2->tmp_chan) ||
1254                     !hwsim_ps_rx_ok(data2, skb))
1255                         continue;
1256
1257                 if (!(data->group & data2->group))
1258                         continue;
1259
1260                 if (data->netgroup != data2->netgroup)
1261                         continue;
1262
1263                 if (!hwsim_chans_compat(chan, data2->tmp_chan) &&
1264                     !hwsim_chans_compat(chan, data2->channel)) {
1265                         ieee80211_iterate_active_interfaces_atomic(
1266                                 data2->hw, IEEE80211_IFACE_ITER_NORMAL,
1267                                 mac80211_hwsim_tx_iter, &tx_iter_data);
1268                         if (!tx_iter_data.receive)
1269                                 continue;
1270                 }
1271
1272                 /*
1273                  * reserve some space for our vendor and the normal
1274                  * radiotap header, since we're copying anyway
1275                  */
1276                 if (skb->len < PAGE_SIZE && paged_rx) {
1277                         struct page *page = alloc_page(GFP_ATOMIC);
1278
1279                         if (!page)
1280                                 continue;
1281
1282                         nskb = dev_alloc_skb(128);
1283                         if (!nskb) {
1284                                 __free_page(page);
1285                                 continue;
1286                         }
1287
1288                         memcpy(page_address(page), skb->data, skb->len);
1289                         skb_add_rx_frag(nskb, 0, page, 0, skb->len, skb->len);
1290                 } else {
1291                         nskb = skb_copy(skb, GFP_ATOMIC);
1292                         if (!nskb)
1293                                 continue;
1294                 }
1295
1296                 if (mac80211_hwsim_addr_match(data2, hdr->addr1))
1297                         ack = true;
1298
1299                 rx_status.mactime = now + data2->tsf_offset;
1300
1301                 memcpy(IEEE80211_SKB_RXCB(nskb), &rx_status, sizeof(rx_status));
1302
1303                 mac80211_hwsim_add_vendor_rtap(nskb);
1304
1305                 data2->rx_pkts++;
1306                 data2->rx_bytes += nskb->len;
1307                 ieee80211_rx_irqsafe(data2->hw, nskb);
1308         }
1309         spin_unlock(&hwsim_radio_lock);
1310
1311         return ack;
1312 }
1313
1314 static void mac80211_hwsim_tx(struct ieee80211_hw *hw,
1315                               struct ieee80211_tx_control *control,
1316                               struct sk_buff *skb)
1317 {
1318         struct mac80211_hwsim_data *data = hw->priv;
1319         struct ieee80211_tx_info *txi = IEEE80211_SKB_CB(skb);
1320         struct ieee80211_hdr *hdr = (void *)skb->data;
1321         struct ieee80211_chanctx_conf *chanctx_conf;
1322         struct ieee80211_channel *channel;
1323         bool ack;
1324         u32 _portid;
1325
1326         if (WARN_ON(skb->len < 10)) {
1327                 /* Should not happen; just a sanity check for addr1 use */
1328                 ieee80211_free_txskb(hw, skb);
1329                 return;
1330         }
1331
1332         if (!data->use_chanctx) {
1333                 channel = data->channel;
1334         } else if (txi->hw_queue == 4) {
1335                 channel = data->tmp_chan;
1336         } else {
1337                 chanctx_conf = rcu_dereference(txi->control.vif->chanctx_conf);
1338                 if (chanctx_conf)
1339                         channel = chanctx_conf->def.chan;
1340                 else
1341                         channel = NULL;
1342         }
1343
1344         if (WARN(!channel, "TX w/o channel - queue = %d\n", txi->hw_queue)) {
1345                 ieee80211_free_txskb(hw, skb);
1346                 return;
1347         }
1348
1349         if (data->idle && !data->tmp_chan) {
1350                 wiphy_dbg(hw->wiphy, "Trying to TX when idle - reject\n");
1351                 ieee80211_free_txskb(hw, skb);
1352                 return;
1353         }
1354
1355         if (txi->control.vif)
1356                 hwsim_check_magic(txi->control.vif);
1357         if (control->sta)
1358                 hwsim_check_sta_magic(control->sta);
1359
1360         if (ieee80211_hw_check(hw, SUPPORTS_RC_TABLE))
1361                 ieee80211_get_tx_rates(txi->control.vif, control->sta, skb,
1362                                        txi->control.rates,
1363                                        ARRAY_SIZE(txi->control.rates));
1364
1365         if (skb->len >= 24 + 8 &&
1366             ieee80211_is_probe_resp(hdr->frame_control)) {
1367                 /* fake header transmission time */
1368                 struct ieee80211_mgmt *mgmt;
1369                 struct ieee80211_rate *txrate;
1370                 u64 ts;
1371
1372                 mgmt = (struct ieee80211_mgmt *)skb->data;
1373                 txrate = ieee80211_get_tx_rate(hw, txi);
1374                 ts = mac80211_hwsim_get_tsf_raw();
1375                 mgmt->u.probe_resp.timestamp =
1376                         cpu_to_le64(ts + data->tsf_offset +
1377                                     24 * 8 * 10 / txrate->bitrate);
1378         }
1379
1380         mac80211_hwsim_monitor_rx(hw, skb, channel);
1381
1382         /* wmediumd mode check */
1383         _portid = READ_ONCE(data->wmediumd);
1384
1385         if (_portid)
1386                 return mac80211_hwsim_tx_frame_nl(hw, skb, _portid);
1387
1388         /* NO wmediumd detected, perfect medium simulation */
1389         data->tx_pkts++;
1390         data->tx_bytes += skb->len;
1391         ack = mac80211_hwsim_tx_frame_no_nl(hw, skb, channel);
1392
1393         if (ack && skb->len >= 16)
1394                 mac80211_hwsim_monitor_ack(channel, hdr->addr2);
1395
1396         ieee80211_tx_info_clear_status(txi);
1397
1398         /* frame was transmitted at most favorable rate at first attempt */
1399         txi->control.rates[0].count = 1;
1400         txi->control.rates[1].idx = -1;
1401
1402         if (!(txi->flags & IEEE80211_TX_CTL_NO_ACK) && ack)
1403                 txi->flags |= IEEE80211_TX_STAT_ACK;
1404         ieee80211_tx_status_irqsafe(hw, skb);
1405 }
1406
1407
1408 static int mac80211_hwsim_start(struct ieee80211_hw *hw)
1409 {
1410         struct mac80211_hwsim_data *data = hw->priv;
1411         wiphy_dbg(hw->wiphy, "%s\n", __func__);
1412         data->started = true;
1413         return 0;
1414 }
1415
1416
1417 static void mac80211_hwsim_stop(struct ieee80211_hw *hw)
1418 {
1419         struct mac80211_hwsim_data *data = hw->priv;
1420         data->started = false;
1421         tasklet_hrtimer_cancel(&data->beacon_timer);
1422         wiphy_dbg(hw->wiphy, "%s\n", __func__);
1423 }
1424
1425
1426 static int mac80211_hwsim_add_interface(struct ieee80211_hw *hw,
1427                                         struct ieee80211_vif *vif)
1428 {
1429         wiphy_dbg(hw->wiphy, "%s (type=%d mac_addr=%pM)\n",
1430                   __func__, ieee80211_vif_type_p2p(vif),
1431                   vif->addr);
1432         hwsim_set_magic(vif);
1433
1434         vif->cab_queue = 0;
1435         vif->hw_queue[IEEE80211_AC_VO] = 0;
1436         vif->hw_queue[IEEE80211_AC_VI] = 1;
1437         vif->hw_queue[IEEE80211_AC_BE] = 2;
1438         vif->hw_queue[IEEE80211_AC_BK] = 3;
1439
1440         return 0;
1441 }
1442
1443
1444 static int mac80211_hwsim_change_interface(struct ieee80211_hw *hw,
1445                                            struct ieee80211_vif *vif,
1446                                            enum nl80211_iftype newtype,
1447                                            bool newp2p)
1448 {
1449         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1450         wiphy_dbg(hw->wiphy,
1451                   "%s (old type=%d, new type=%d, mac_addr=%pM)\n",
1452                   __func__, ieee80211_vif_type_p2p(vif),
1453                     newtype, vif->addr);
1454         hwsim_check_magic(vif);
1455
1456         /*
1457          * interface may change from non-AP to AP in
1458          * which case this needs to be set up again
1459          */
1460         vif->cab_queue = 0;
1461
1462         return 0;
1463 }
1464
1465 static void mac80211_hwsim_remove_interface(
1466         struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1467 {
1468         wiphy_dbg(hw->wiphy, "%s (type=%d mac_addr=%pM)\n",
1469                   __func__, ieee80211_vif_type_p2p(vif),
1470                   vif->addr);
1471         hwsim_check_magic(vif);
1472         hwsim_clear_magic(vif);
1473 }
1474
1475 static void mac80211_hwsim_tx_frame(struct ieee80211_hw *hw,
1476                                     struct sk_buff *skb,
1477                                     struct ieee80211_channel *chan)
1478 {
1479         struct mac80211_hwsim_data *data = hw->priv;
1480         u32 _pid = READ_ONCE(data->wmediumd);
1481
1482         if (ieee80211_hw_check(hw, SUPPORTS_RC_TABLE)) {
1483                 struct ieee80211_tx_info *txi = IEEE80211_SKB_CB(skb);
1484                 ieee80211_get_tx_rates(txi->control.vif, NULL, skb,
1485                                        txi->control.rates,
1486                                        ARRAY_SIZE(txi->control.rates));
1487         }
1488
1489         mac80211_hwsim_monitor_rx(hw, skb, chan);
1490
1491         if (_pid)
1492                 return mac80211_hwsim_tx_frame_nl(hw, skb, _pid);
1493
1494         mac80211_hwsim_tx_frame_no_nl(hw, skb, chan);
1495         dev_kfree_skb(skb);
1496 }
1497
1498 static void mac80211_hwsim_beacon_tx(void *arg, u8 *mac,
1499                                      struct ieee80211_vif *vif)
1500 {
1501         struct mac80211_hwsim_data *data = arg;
1502         struct ieee80211_hw *hw = data->hw;
1503         struct ieee80211_tx_info *info;
1504         struct ieee80211_rate *txrate;
1505         struct ieee80211_mgmt *mgmt;
1506         struct sk_buff *skb;
1507
1508         hwsim_check_magic(vif);
1509
1510         if (vif->type != NL80211_IFTYPE_AP &&
1511             vif->type != NL80211_IFTYPE_MESH_POINT &&
1512             vif->type != NL80211_IFTYPE_ADHOC)
1513                 return;
1514
1515         skb = ieee80211_beacon_get(hw, vif);
1516         if (skb == NULL)
1517                 return;
1518         info = IEEE80211_SKB_CB(skb);
1519         if (ieee80211_hw_check(hw, SUPPORTS_RC_TABLE))
1520                 ieee80211_get_tx_rates(vif, NULL, skb,
1521                                        info->control.rates,
1522                                        ARRAY_SIZE(info->control.rates));
1523
1524         txrate = ieee80211_get_tx_rate(hw, info);
1525
1526         mgmt = (struct ieee80211_mgmt *) skb->data;
1527         /* fake header transmission time */
1528         data->abs_bcn_ts = mac80211_hwsim_get_tsf_raw();
1529         mgmt->u.beacon.timestamp = cpu_to_le64(data->abs_bcn_ts +
1530                                                data->tsf_offset +
1531                                                24 * 8 * 10 / txrate->bitrate);
1532
1533         mac80211_hwsim_tx_frame(hw, skb,
1534                                 rcu_dereference(vif->chanctx_conf)->def.chan);
1535
1536         if (vif->csa_active && ieee80211_csa_is_complete(vif))
1537                 ieee80211_csa_finish(vif);
1538 }
1539
1540 static enum hrtimer_restart
1541 mac80211_hwsim_beacon(struct hrtimer *timer)
1542 {
1543         struct mac80211_hwsim_data *data =
1544                 container_of(timer, struct mac80211_hwsim_data,
1545                              beacon_timer.timer);
1546         struct ieee80211_hw *hw = data->hw;
1547         u64 bcn_int = data->beacon_int;
1548         ktime_t next_bcn;
1549
1550         if (!data->started)
1551                 goto out;
1552
1553         ieee80211_iterate_active_interfaces_atomic(
1554                 hw, IEEE80211_IFACE_ITER_NORMAL,
1555                 mac80211_hwsim_beacon_tx, data);
1556
1557         /* beacon at new TBTT + beacon interval */
1558         if (data->bcn_delta) {
1559                 bcn_int -= data->bcn_delta;
1560                 data->bcn_delta = 0;
1561         }
1562
1563         next_bcn = ktime_add(hrtimer_get_expires(timer),
1564                              ns_to_ktime(bcn_int * 1000));
1565         tasklet_hrtimer_start(&data->beacon_timer, next_bcn, HRTIMER_MODE_ABS);
1566 out:
1567         return HRTIMER_NORESTART;
1568 }
1569
1570 static const char * const hwsim_chanwidths[] = {
1571         [NL80211_CHAN_WIDTH_20_NOHT] = "noht",
1572         [NL80211_CHAN_WIDTH_20] = "ht20",
1573         [NL80211_CHAN_WIDTH_40] = "ht40",
1574         [NL80211_CHAN_WIDTH_80] = "vht80",
1575         [NL80211_CHAN_WIDTH_80P80] = "vht80p80",
1576         [NL80211_CHAN_WIDTH_160] = "vht160",
1577 };
1578
1579 static int mac80211_hwsim_config(struct ieee80211_hw *hw, u32 changed)
1580 {
1581         struct mac80211_hwsim_data *data = hw->priv;
1582         struct ieee80211_conf *conf = &hw->conf;
1583         static const char *smps_modes[IEEE80211_SMPS_NUM_MODES] = {
1584                 [IEEE80211_SMPS_AUTOMATIC] = "auto",
1585                 [IEEE80211_SMPS_OFF] = "off",
1586                 [IEEE80211_SMPS_STATIC] = "static",
1587                 [IEEE80211_SMPS_DYNAMIC] = "dynamic",
1588         };
1589         int idx;
1590
1591         if (conf->chandef.chan)
1592                 wiphy_dbg(hw->wiphy,
1593                           "%s (freq=%d(%d - %d)/%s idle=%d ps=%d smps=%s)\n",
1594                           __func__,
1595                           conf->chandef.chan->center_freq,
1596                           conf->chandef.center_freq1,
1597                           conf->chandef.center_freq2,
1598                           hwsim_chanwidths[conf->chandef.width],
1599                           !!(conf->flags & IEEE80211_CONF_IDLE),
1600                           !!(conf->flags & IEEE80211_CONF_PS),
1601                           smps_modes[conf->smps_mode]);
1602         else
1603                 wiphy_dbg(hw->wiphy,
1604                           "%s (freq=0 idle=%d ps=%d smps=%s)\n",
1605                           __func__,
1606                           !!(conf->flags & IEEE80211_CONF_IDLE),
1607                           !!(conf->flags & IEEE80211_CONF_PS),
1608                           smps_modes[conf->smps_mode]);
1609
1610         data->idle = !!(conf->flags & IEEE80211_CONF_IDLE);
1611
1612         WARN_ON(conf->chandef.chan && data->use_chanctx);
1613
1614         mutex_lock(&data->mutex);
1615         if (data->scanning && conf->chandef.chan) {
1616                 for (idx = 0; idx < ARRAY_SIZE(data->survey_data); idx++) {
1617                         if (data->survey_data[idx].channel == data->channel) {
1618                                 data->survey_data[idx].start =
1619                                         data->survey_data[idx].next_start;
1620                                 data->survey_data[idx].end = jiffies;
1621                                 break;
1622                         }
1623                 }
1624
1625                 data->channel = conf->chandef.chan;
1626
1627                 for (idx = 0; idx < ARRAY_SIZE(data->survey_data); idx++) {
1628                         if (data->survey_data[idx].channel &&
1629                             data->survey_data[idx].channel != data->channel)
1630                                 continue;
1631                         data->survey_data[idx].channel = data->channel;
1632                         data->survey_data[idx].next_start = jiffies;
1633                         break;
1634                 }
1635         } else {
1636                 data->channel = conf->chandef.chan;
1637         }
1638         mutex_unlock(&data->mutex);
1639
1640         if (!data->started || !data->beacon_int)
1641                 tasklet_hrtimer_cancel(&data->beacon_timer);
1642         else if (!hrtimer_is_queued(&data->beacon_timer.timer)) {
1643                 u64 tsf = mac80211_hwsim_get_tsf(hw, NULL);
1644                 u32 bcn_int = data->beacon_int;
1645                 u64 until_tbtt = bcn_int - do_div(tsf, bcn_int);
1646
1647                 tasklet_hrtimer_start(&data->beacon_timer,
1648                                       ns_to_ktime(until_tbtt * 1000),
1649                                       HRTIMER_MODE_REL);
1650         }
1651
1652         return 0;
1653 }
1654
1655
1656 static void mac80211_hwsim_configure_filter(struct ieee80211_hw *hw,
1657                                             unsigned int changed_flags,
1658                                             unsigned int *total_flags,u64 multicast)
1659 {
1660         struct mac80211_hwsim_data *data = hw->priv;
1661
1662         wiphy_dbg(hw->wiphy, "%s\n", __func__);
1663
1664         data->rx_filter = 0;
1665         if (*total_flags & FIF_ALLMULTI)
1666                 data->rx_filter |= FIF_ALLMULTI;
1667
1668         *total_flags = data->rx_filter;
1669 }
1670
1671 static void mac80211_hwsim_bcn_en_iter(void *data, u8 *mac,
1672                                        struct ieee80211_vif *vif)
1673 {
1674         unsigned int *count = data;
1675         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
1676
1677         if (vp->bcn_en)
1678                 (*count)++;
1679 }
1680
1681 static void mac80211_hwsim_bss_info_changed(struct ieee80211_hw *hw,
1682                                             struct ieee80211_vif *vif,
1683                                             struct ieee80211_bss_conf *info,
1684                                             u32 changed)
1685 {
1686         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
1687         struct mac80211_hwsim_data *data = hw->priv;
1688
1689         hwsim_check_magic(vif);
1690
1691         wiphy_dbg(hw->wiphy, "%s(changed=0x%x vif->addr=%pM)\n",
1692                   __func__, changed, vif->addr);
1693
1694         if (changed & BSS_CHANGED_BSSID) {
1695                 wiphy_dbg(hw->wiphy, "%s: BSSID changed: %pM\n",
1696                           __func__, info->bssid);
1697                 memcpy(vp->bssid, info->bssid, ETH_ALEN);
1698         }
1699
1700         if (changed & BSS_CHANGED_ASSOC) {
1701                 wiphy_dbg(hw->wiphy, "  ASSOC: assoc=%d aid=%d\n",
1702                           info->assoc, info->aid);
1703                 vp->assoc = info->assoc;
1704                 vp->aid = info->aid;
1705         }
1706
1707         if (changed & BSS_CHANGED_BEACON_ENABLED) {
1708                 wiphy_dbg(hw->wiphy, "  BCN EN: %d (BI=%u)\n",
1709                           info->enable_beacon, info->beacon_int);
1710                 vp->bcn_en = info->enable_beacon;
1711                 if (data->started &&
1712                     !hrtimer_is_queued(&data->beacon_timer.timer) &&
1713                     info->enable_beacon) {
1714                         u64 tsf, until_tbtt;
1715                         u32 bcn_int;
1716                         data->beacon_int = info->beacon_int * 1024;
1717                         tsf = mac80211_hwsim_get_tsf(hw, vif);
1718                         bcn_int = data->beacon_int;
1719                         until_tbtt = bcn_int - do_div(tsf, bcn_int);
1720                         tasklet_hrtimer_start(&data->beacon_timer,
1721                                               ns_to_ktime(until_tbtt * 1000),
1722                                               HRTIMER_MODE_REL);
1723                 } else if (!info->enable_beacon) {
1724                         unsigned int count = 0;
1725                         ieee80211_iterate_active_interfaces_atomic(
1726                                 data->hw, IEEE80211_IFACE_ITER_NORMAL,
1727                                 mac80211_hwsim_bcn_en_iter, &count);
1728                         wiphy_dbg(hw->wiphy, "  beaconing vifs remaining: %u",
1729                                   count);
1730                         if (count == 0) {
1731                                 tasklet_hrtimer_cancel(&data->beacon_timer);
1732                                 data->beacon_int = 0;
1733                         }
1734                 }
1735         }
1736
1737         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1738                 wiphy_dbg(hw->wiphy, "  ERP_CTS_PROT: %d\n",
1739                           info->use_cts_prot);
1740         }
1741
1742         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1743                 wiphy_dbg(hw->wiphy, "  ERP_PREAMBLE: %d\n",
1744                           info->use_short_preamble);
1745         }
1746
1747         if (changed & BSS_CHANGED_ERP_SLOT) {
1748                 wiphy_dbg(hw->wiphy, "  ERP_SLOT: %d\n", info->use_short_slot);
1749         }
1750
1751         if (changed & BSS_CHANGED_HT) {
1752                 wiphy_dbg(hw->wiphy, "  HT: op_mode=0x%x\n",
1753                           info->ht_operation_mode);
1754         }
1755
1756         if (changed & BSS_CHANGED_BASIC_RATES) {
1757                 wiphy_dbg(hw->wiphy, "  BASIC_RATES: 0x%llx\n",
1758                           (unsigned long long) info->basic_rates);
1759         }
1760
1761         if (changed & BSS_CHANGED_TXPOWER)
1762                 wiphy_dbg(hw->wiphy, "  TX Power: %d dBm\n", info->txpower);
1763 }
1764
1765 static int mac80211_hwsim_sta_add(struct ieee80211_hw *hw,
1766                                   struct ieee80211_vif *vif,
1767                                   struct ieee80211_sta *sta)
1768 {
1769         hwsim_check_magic(vif);
1770         hwsim_set_sta_magic(sta);
1771
1772         return 0;
1773 }
1774
1775 static int mac80211_hwsim_sta_remove(struct ieee80211_hw *hw,
1776                                      struct ieee80211_vif *vif,
1777                                      struct ieee80211_sta *sta)
1778 {
1779         hwsim_check_magic(vif);
1780         hwsim_clear_sta_magic(sta);
1781
1782         return 0;
1783 }
1784
1785 static void mac80211_hwsim_sta_notify(struct ieee80211_hw *hw,
1786                                       struct ieee80211_vif *vif,
1787                                       enum sta_notify_cmd cmd,
1788                                       struct ieee80211_sta *sta)
1789 {
1790         hwsim_check_magic(vif);
1791
1792         switch (cmd) {
1793         case STA_NOTIFY_SLEEP:
1794         case STA_NOTIFY_AWAKE:
1795                 /* TODO: make good use of these flags */
1796                 break;
1797         default:
1798                 WARN(1, "Invalid sta notify: %d\n", cmd);
1799                 break;
1800         }
1801 }
1802
1803 static int mac80211_hwsim_set_tim(struct ieee80211_hw *hw,
1804                                   struct ieee80211_sta *sta,
1805                                   bool set)
1806 {
1807         hwsim_check_sta_magic(sta);
1808         return 0;
1809 }
1810
1811 static int mac80211_hwsim_conf_tx(
1812         struct ieee80211_hw *hw,
1813         struct ieee80211_vif *vif, u16 queue,
1814         const struct ieee80211_tx_queue_params *params)
1815 {
1816         wiphy_dbg(hw->wiphy,
1817                   "%s (queue=%d txop=%d cw_min=%d cw_max=%d aifs=%d)\n",
1818                   __func__, queue,
1819                   params->txop, params->cw_min,
1820                   params->cw_max, params->aifs);
1821         return 0;
1822 }
1823
1824 static int mac80211_hwsim_get_survey(struct ieee80211_hw *hw, int idx,
1825                                      struct survey_info *survey)
1826 {
1827         struct mac80211_hwsim_data *hwsim = hw->priv;
1828
1829         if (idx < 0 || idx >= ARRAY_SIZE(hwsim->survey_data))
1830                 return -ENOENT;
1831
1832         mutex_lock(&hwsim->mutex);
1833         survey->channel = hwsim->survey_data[idx].channel;
1834         if (!survey->channel) {
1835                 mutex_unlock(&hwsim->mutex);
1836                 return -ENOENT;
1837         }
1838
1839         /*
1840          * Magically conjured dummy values --- this is only ok for simulated hardware.
1841          *
1842          * A real driver which cannot determine real values noise MUST NOT
1843          * report any, especially not a magically conjured ones :-)
1844          */
1845         survey->filled = SURVEY_INFO_NOISE_DBM |
1846                          SURVEY_INFO_TIME |
1847                          SURVEY_INFO_TIME_BUSY;
1848         survey->noise = -92;
1849         survey->time =
1850                 jiffies_to_msecs(hwsim->survey_data[idx].end -
1851                                  hwsim->survey_data[idx].start);
1852         /* report 12.5% of channel time is used */
1853         survey->time_busy = survey->time/8;
1854         mutex_unlock(&hwsim->mutex);
1855
1856         return 0;
1857 }
1858
1859 #ifdef CONFIG_NL80211_TESTMODE
1860 /*
1861  * This section contains example code for using netlink
1862  * attributes with the testmode command in nl80211.
1863  */
1864
1865 /* These enums need to be kept in sync with userspace */
1866 enum hwsim_testmode_attr {
1867         __HWSIM_TM_ATTR_INVALID = 0,
1868         HWSIM_TM_ATTR_CMD       = 1,
1869         HWSIM_TM_ATTR_PS        = 2,
1870
1871         /* keep last */
1872         __HWSIM_TM_ATTR_AFTER_LAST,
1873         HWSIM_TM_ATTR_MAX       = __HWSIM_TM_ATTR_AFTER_LAST - 1
1874 };
1875
1876 enum hwsim_testmode_cmd {
1877         HWSIM_TM_CMD_SET_PS             = 0,
1878         HWSIM_TM_CMD_GET_PS             = 1,
1879         HWSIM_TM_CMD_STOP_QUEUES        = 2,
1880         HWSIM_TM_CMD_WAKE_QUEUES        = 3,
1881 };
1882
1883 static const struct nla_policy hwsim_testmode_policy[HWSIM_TM_ATTR_MAX + 1] = {
1884         [HWSIM_TM_ATTR_CMD] = { .type = NLA_U32 },
1885         [HWSIM_TM_ATTR_PS] = { .type = NLA_U32 },
1886 };
1887
1888 static int mac80211_hwsim_testmode_cmd(struct ieee80211_hw *hw,
1889                                        struct ieee80211_vif *vif,
1890                                        void *data, int len)
1891 {
1892         struct mac80211_hwsim_data *hwsim = hw->priv;
1893         struct nlattr *tb[HWSIM_TM_ATTR_MAX + 1];
1894         struct sk_buff *skb;
1895         int err, ps;
1896
1897         err = nla_parse(tb, HWSIM_TM_ATTR_MAX, data, len,
1898                         hwsim_testmode_policy, NULL);
1899         if (err)
1900                 return err;
1901
1902         if (!tb[HWSIM_TM_ATTR_CMD])
1903                 return -EINVAL;
1904
1905         switch (nla_get_u32(tb[HWSIM_TM_ATTR_CMD])) {
1906         case HWSIM_TM_CMD_SET_PS:
1907                 if (!tb[HWSIM_TM_ATTR_PS])
1908                         return -EINVAL;
1909                 ps = nla_get_u32(tb[HWSIM_TM_ATTR_PS]);
1910                 return hwsim_fops_ps_write(hwsim, ps);
1911         case HWSIM_TM_CMD_GET_PS:
1912                 skb = cfg80211_testmode_alloc_reply_skb(hw->wiphy,
1913                                                 nla_total_size(sizeof(u32)));
1914                 if (!skb)
1915                         return -ENOMEM;
1916                 if (nla_put_u32(skb, HWSIM_TM_ATTR_PS, hwsim->ps))
1917                         goto nla_put_failure;
1918                 return cfg80211_testmode_reply(skb);
1919         case HWSIM_TM_CMD_STOP_QUEUES:
1920                 ieee80211_stop_queues(hw);
1921                 return 0;
1922         case HWSIM_TM_CMD_WAKE_QUEUES:
1923                 ieee80211_wake_queues(hw);
1924                 return 0;
1925         default:
1926                 return -EOPNOTSUPP;
1927         }
1928
1929  nla_put_failure:
1930         kfree_skb(skb);
1931         return -ENOBUFS;
1932 }
1933 #endif
1934
1935 static int mac80211_hwsim_ampdu_action(struct ieee80211_hw *hw,
1936                                        struct ieee80211_vif *vif,
1937                                        struct ieee80211_ampdu_params *params)
1938 {
1939         struct ieee80211_sta *sta = params->sta;
1940         enum ieee80211_ampdu_mlme_action action = params->action;
1941         u16 tid = params->tid;
1942
1943         switch (action) {
1944         case IEEE80211_AMPDU_TX_START:
1945                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1946                 break;
1947         case IEEE80211_AMPDU_TX_STOP_CONT:
1948         case IEEE80211_AMPDU_TX_STOP_FLUSH:
1949         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
1950                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1951                 break;
1952         case IEEE80211_AMPDU_TX_OPERATIONAL:
1953                 break;
1954         case IEEE80211_AMPDU_RX_START:
1955         case IEEE80211_AMPDU_RX_STOP:
1956                 break;
1957         default:
1958                 return -EOPNOTSUPP;
1959         }
1960
1961         return 0;
1962 }
1963
1964 static void mac80211_hwsim_flush(struct ieee80211_hw *hw,
1965                                  struct ieee80211_vif *vif,
1966                                  u32 queues, bool drop)
1967 {
1968         /* Not implemented, queues only on kernel side */
1969 }
1970
1971 static void hw_scan_work(struct work_struct *work)
1972 {
1973         struct mac80211_hwsim_data *hwsim =
1974                 container_of(work, struct mac80211_hwsim_data, hw_scan.work);
1975         struct cfg80211_scan_request *req = hwsim->hw_scan_request;
1976         int dwell, i;
1977
1978         mutex_lock(&hwsim->mutex);
1979         if (hwsim->scan_chan_idx >= req->n_channels) {
1980                 struct cfg80211_scan_info info = {
1981                         .aborted = false,
1982                 };
1983
1984                 wiphy_dbg(hwsim->hw->wiphy, "hw scan complete\n");
1985                 ieee80211_scan_completed(hwsim->hw, &info);
1986                 hwsim->hw_scan_request = NULL;
1987                 hwsim->hw_scan_vif = NULL;
1988                 hwsim->tmp_chan = NULL;
1989                 mutex_unlock(&hwsim->mutex);
1990                 return;
1991         }
1992
1993         wiphy_dbg(hwsim->hw->wiphy, "hw scan %d MHz\n",
1994                   req->channels[hwsim->scan_chan_idx]->center_freq);
1995
1996         hwsim->tmp_chan = req->channels[hwsim->scan_chan_idx];
1997         if (hwsim->tmp_chan->flags & (IEEE80211_CHAN_NO_IR |
1998                                       IEEE80211_CHAN_RADAR) ||
1999             !req->n_ssids) {
2000                 dwell = 120;
2001         } else {
2002                 dwell = 30;
2003                 /* send probes */
2004                 for (i = 0; i < req->n_ssids; i++) {
2005                         struct sk_buff *probe;
2006                         struct ieee80211_mgmt *mgmt;
2007
2008                         probe = ieee80211_probereq_get(hwsim->hw,
2009                                                        hwsim->scan_addr,
2010                                                        req->ssids[i].ssid,
2011                                                        req->ssids[i].ssid_len,
2012                                                        req->ie_len);
2013                         if (!probe)
2014                                 continue;
2015
2016                         mgmt = (struct ieee80211_mgmt *) probe->data;
2017                         memcpy(mgmt->da, req->bssid, ETH_ALEN);
2018                         memcpy(mgmt->bssid, req->bssid, ETH_ALEN);
2019
2020                         if (req->ie_len)
2021                                 skb_put_data(probe, req->ie, req->ie_len);
2022
2023                         local_bh_disable();
2024                         mac80211_hwsim_tx_frame(hwsim->hw, probe,
2025                                                 hwsim->tmp_chan);
2026                         local_bh_enable();
2027                 }
2028         }
2029         ieee80211_queue_delayed_work(hwsim->hw, &hwsim->hw_scan,
2030                                      msecs_to_jiffies(dwell));
2031         hwsim->survey_data[hwsim->scan_chan_idx].channel = hwsim->tmp_chan;
2032         hwsim->survey_data[hwsim->scan_chan_idx].start = jiffies;
2033         hwsim->survey_data[hwsim->scan_chan_idx].end =
2034                 jiffies + msecs_to_jiffies(dwell);
2035         hwsim->scan_chan_idx++;
2036         mutex_unlock(&hwsim->mutex);
2037 }
2038
2039 static int mac80211_hwsim_hw_scan(struct ieee80211_hw *hw,
2040                                   struct ieee80211_vif *vif,
2041                                   struct ieee80211_scan_request *hw_req)
2042 {
2043         struct mac80211_hwsim_data *hwsim = hw->priv;
2044         struct cfg80211_scan_request *req = &hw_req->req;
2045
2046         mutex_lock(&hwsim->mutex);
2047         if (WARN_ON(hwsim->tmp_chan || hwsim->hw_scan_request)) {
2048                 mutex_unlock(&hwsim->mutex);
2049                 return -EBUSY;
2050         }
2051         hwsim->hw_scan_request = req;
2052         hwsim->hw_scan_vif = vif;
2053         hwsim->scan_chan_idx = 0;
2054         if (req->flags & NL80211_SCAN_FLAG_RANDOM_ADDR)
2055                 get_random_mask_addr(hwsim->scan_addr,
2056                                      hw_req->req.mac_addr,
2057                                      hw_req->req.mac_addr_mask);
2058         else
2059                 memcpy(hwsim->scan_addr, vif->addr, ETH_ALEN);
2060         memset(hwsim->survey_data, 0, sizeof(hwsim->survey_data));
2061         mutex_unlock(&hwsim->mutex);
2062
2063         wiphy_dbg(hw->wiphy, "hwsim hw_scan request\n");
2064
2065         ieee80211_queue_delayed_work(hwsim->hw, &hwsim->hw_scan, 0);
2066
2067         return 0;
2068 }
2069
2070 static void mac80211_hwsim_cancel_hw_scan(struct ieee80211_hw *hw,
2071                                           struct ieee80211_vif *vif)
2072 {
2073         struct mac80211_hwsim_data *hwsim = hw->priv;
2074         struct cfg80211_scan_info info = {
2075                 .aborted = true,
2076         };
2077
2078         wiphy_dbg(hw->wiphy, "hwsim cancel_hw_scan\n");
2079
2080         cancel_delayed_work_sync(&hwsim->hw_scan);
2081
2082         mutex_lock(&hwsim->mutex);
2083         ieee80211_scan_completed(hwsim->hw, &info);
2084         hwsim->tmp_chan = NULL;
2085         hwsim->hw_scan_request = NULL;
2086         hwsim->hw_scan_vif = NULL;
2087         mutex_unlock(&hwsim->mutex);
2088 }
2089
2090 static void mac80211_hwsim_sw_scan(struct ieee80211_hw *hw,
2091                                    struct ieee80211_vif *vif,
2092                                    const u8 *mac_addr)
2093 {
2094         struct mac80211_hwsim_data *hwsim = hw->priv;
2095
2096         mutex_lock(&hwsim->mutex);
2097
2098         if (hwsim->scanning) {
2099                 pr_debug("two hwsim sw_scans detected!\n");
2100                 goto out;
2101         }
2102
2103         pr_debug("hwsim sw_scan request, prepping stuff\n");
2104
2105         memcpy(hwsim->scan_addr, mac_addr, ETH_ALEN);
2106         hwsim->scanning = true;
2107         memset(hwsim->survey_data, 0, sizeof(hwsim->survey_data));
2108
2109 out:
2110         mutex_unlock(&hwsim->mutex);
2111 }
2112
2113 static void mac80211_hwsim_sw_scan_complete(struct ieee80211_hw *hw,
2114                                             struct ieee80211_vif *vif)
2115 {
2116         struct mac80211_hwsim_data *hwsim = hw->priv;
2117
2118         mutex_lock(&hwsim->mutex);
2119
2120         pr_debug("hwsim sw_scan_complete\n");
2121         hwsim->scanning = false;
2122         eth_zero_addr(hwsim->scan_addr);
2123
2124         mutex_unlock(&hwsim->mutex);
2125 }
2126
2127 static void hw_roc_start(struct work_struct *work)
2128 {
2129         struct mac80211_hwsim_data *hwsim =
2130                 container_of(work, struct mac80211_hwsim_data, roc_start.work);
2131
2132         mutex_lock(&hwsim->mutex);
2133
2134         wiphy_dbg(hwsim->hw->wiphy, "hwsim ROC begins\n");
2135         hwsim->tmp_chan = hwsim->roc_chan;
2136         ieee80211_ready_on_channel(hwsim->hw);
2137
2138         ieee80211_queue_delayed_work(hwsim->hw, &hwsim->roc_done,
2139                                      msecs_to_jiffies(hwsim->roc_duration));
2140
2141         mutex_unlock(&hwsim->mutex);
2142 }
2143
2144 static void hw_roc_done(struct work_struct *work)
2145 {
2146         struct mac80211_hwsim_data *hwsim =
2147                 container_of(work, struct mac80211_hwsim_data, roc_done.work);
2148
2149         mutex_lock(&hwsim->mutex);
2150         ieee80211_remain_on_channel_expired(hwsim->hw);
2151         hwsim->tmp_chan = NULL;
2152         mutex_unlock(&hwsim->mutex);
2153
2154         wiphy_dbg(hwsim->hw->wiphy, "hwsim ROC expired\n");
2155 }
2156
2157 static int mac80211_hwsim_roc(struct ieee80211_hw *hw,
2158                               struct ieee80211_vif *vif,
2159                               struct ieee80211_channel *chan,
2160                               int duration,
2161                               enum ieee80211_roc_type type)
2162 {
2163         struct mac80211_hwsim_data *hwsim = hw->priv;
2164
2165         mutex_lock(&hwsim->mutex);
2166         if (WARN_ON(hwsim->tmp_chan || hwsim->hw_scan_request)) {
2167                 mutex_unlock(&hwsim->mutex);
2168                 return -EBUSY;
2169         }
2170
2171         hwsim->roc_chan = chan;
2172         hwsim->roc_duration = duration;
2173         mutex_unlock(&hwsim->mutex);
2174
2175         wiphy_dbg(hw->wiphy, "hwsim ROC (%d MHz, %d ms)\n",
2176                   chan->center_freq, duration);
2177         ieee80211_queue_delayed_work(hw, &hwsim->roc_start, HZ/50);
2178
2179         return 0;
2180 }
2181
2182 static int mac80211_hwsim_croc(struct ieee80211_hw *hw)
2183 {
2184         struct mac80211_hwsim_data *hwsim = hw->priv;
2185
2186         cancel_delayed_work_sync(&hwsim->roc_start);
2187         cancel_delayed_work_sync(&hwsim->roc_done);
2188
2189         mutex_lock(&hwsim->mutex);
2190         hwsim->tmp_chan = NULL;
2191         mutex_unlock(&hwsim->mutex);
2192
2193         wiphy_dbg(hw->wiphy, "hwsim ROC canceled\n");
2194
2195         return 0;
2196 }
2197
2198 static int mac80211_hwsim_add_chanctx(struct ieee80211_hw *hw,
2199                                       struct ieee80211_chanctx_conf *ctx)
2200 {
2201         hwsim_set_chanctx_magic(ctx);
2202         wiphy_dbg(hw->wiphy,
2203                   "add channel context control: %d MHz/width: %d/cfreqs:%d/%d MHz\n",
2204                   ctx->def.chan->center_freq, ctx->def.width,
2205                   ctx->def.center_freq1, ctx->def.center_freq2);
2206         return 0;
2207 }
2208
2209 static void mac80211_hwsim_remove_chanctx(struct ieee80211_hw *hw,
2210                                           struct ieee80211_chanctx_conf *ctx)
2211 {
2212         wiphy_dbg(hw->wiphy,
2213                   "remove channel context control: %d MHz/width: %d/cfreqs:%d/%d MHz\n",
2214                   ctx->def.chan->center_freq, ctx->def.width,
2215                   ctx->def.center_freq1, ctx->def.center_freq2);
2216         hwsim_check_chanctx_magic(ctx);
2217         hwsim_clear_chanctx_magic(ctx);
2218 }
2219
2220 static void mac80211_hwsim_change_chanctx(struct ieee80211_hw *hw,
2221                                           struct ieee80211_chanctx_conf *ctx,
2222                                           u32 changed)
2223 {
2224         hwsim_check_chanctx_magic(ctx);
2225         wiphy_dbg(hw->wiphy,
2226                   "change channel context control: %d MHz/width: %d/cfreqs:%d/%d MHz\n",
2227                   ctx->def.chan->center_freq, ctx->def.width,
2228                   ctx->def.center_freq1, ctx->def.center_freq2);
2229 }
2230
2231 static int mac80211_hwsim_assign_vif_chanctx(struct ieee80211_hw *hw,
2232                                              struct ieee80211_vif *vif,
2233                                              struct ieee80211_chanctx_conf *ctx)
2234 {
2235         hwsim_check_magic(vif);
2236         hwsim_check_chanctx_magic(ctx);
2237
2238         return 0;
2239 }
2240
2241 static void mac80211_hwsim_unassign_vif_chanctx(struct ieee80211_hw *hw,
2242                                                 struct ieee80211_vif *vif,
2243                                                 struct ieee80211_chanctx_conf *ctx)
2244 {
2245         hwsim_check_magic(vif);
2246         hwsim_check_chanctx_magic(ctx);
2247 }
2248
2249 static const char mac80211_hwsim_gstrings_stats[][ETH_GSTRING_LEN] = {
2250         "tx_pkts_nic",
2251         "tx_bytes_nic",
2252         "rx_pkts_nic",
2253         "rx_bytes_nic",
2254         "d_tx_dropped",
2255         "d_tx_failed",
2256         "d_ps_mode",
2257         "d_group",
2258 };
2259
2260 #define MAC80211_HWSIM_SSTATS_LEN ARRAY_SIZE(mac80211_hwsim_gstrings_stats)
2261
2262 static void mac80211_hwsim_get_et_strings(struct ieee80211_hw *hw,
2263                                           struct ieee80211_vif *vif,
2264                                           u32 sset, u8 *data)
2265 {
2266         if (sset == ETH_SS_STATS)
2267                 memcpy(data, *mac80211_hwsim_gstrings_stats,
2268                        sizeof(mac80211_hwsim_gstrings_stats));
2269 }
2270
2271 static int mac80211_hwsim_get_et_sset_count(struct ieee80211_hw *hw,
2272                                             struct ieee80211_vif *vif, int sset)
2273 {
2274         if (sset == ETH_SS_STATS)
2275                 return MAC80211_HWSIM_SSTATS_LEN;
2276         return 0;
2277 }
2278
2279 static void mac80211_hwsim_get_et_stats(struct ieee80211_hw *hw,
2280                                         struct ieee80211_vif *vif,
2281                                         struct ethtool_stats *stats, u64 *data)
2282 {
2283         struct mac80211_hwsim_data *ar = hw->priv;
2284         int i = 0;
2285
2286         data[i++] = ar->tx_pkts;
2287         data[i++] = ar->tx_bytes;
2288         data[i++] = ar->rx_pkts;
2289         data[i++] = ar->rx_bytes;
2290         data[i++] = ar->tx_dropped;
2291         data[i++] = ar->tx_failed;
2292         data[i++] = ar->ps;
2293         data[i++] = ar->group;
2294
2295         WARN_ON(i != MAC80211_HWSIM_SSTATS_LEN);
2296 }
2297
2298 #define HWSIM_COMMON_OPS                                        \
2299         .tx = mac80211_hwsim_tx,                                \
2300         .start = mac80211_hwsim_start,                          \
2301         .stop = mac80211_hwsim_stop,                            \
2302         .add_interface = mac80211_hwsim_add_interface,          \
2303         .change_interface = mac80211_hwsim_change_interface,    \
2304         .remove_interface = mac80211_hwsim_remove_interface,    \
2305         .config = mac80211_hwsim_config,                        \
2306         .configure_filter = mac80211_hwsim_configure_filter,    \
2307         .bss_info_changed = mac80211_hwsim_bss_info_changed,    \
2308         .sta_add = mac80211_hwsim_sta_add,                      \
2309         .sta_remove = mac80211_hwsim_sta_remove,                \
2310         .sta_notify = mac80211_hwsim_sta_notify,                \
2311         .set_tim = mac80211_hwsim_set_tim,                      \
2312         .conf_tx = mac80211_hwsim_conf_tx,                      \
2313         .get_survey = mac80211_hwsim_get_survey,                \
2314         CFG80211_TESTMODE_CMD(mac80211_hwsim_testmode_cmd)      \
2315         .ampdu_action = mac80211_hwsim_ampdu_action,            \
2316         .flush = mac80211_hwsim_flush,                          \
2317         .get_tsf = mac80211_hwsim_get_tsf,                      \
2318         .set_tsf = mac80211_hwsim_set_tsf,                      \
2319         .get_et_sset_count = mac80211_hwsim_get_et_sset_count,  \
2320         .get_et_stats = mac80211_hwsim_get_et_stats,            \
2321         .get_et_strings = mac80211_hwsim_get_et_strings,
2322
2323 static const struct ieee80211_ops mac80211_hwsim_ops = {
2324         HWSIM_COMMON_OPS
2325         .sw_scan_start = mac80211_hwsim_sw_scan,
2326         .sw_scan_complete = mac80211_hwsim_sw_scan_complete,
2327 };
2328
2329 static const struct ieee80211_ops mac80211_hwsim_mchan_ops = {
2330         HWSIM_COMMON_OPS
2331         .hw_scan = mac80211_hwsim_hw_scan,
2332         .cancel_hw_scan = mac80211_hwsim_cancel_hw_scan,
2333         .sw_scan_start = NULL,
2334         .sw_scan_complete = NULL,
2335         .remain_on_channel = mac80211_hwsim_roc,
2336         .cancel_remain_on_channel = mac80211_hwsim_croc,
2337         .add_chanctx = mac80211_hwsim_add_chanctx,
2338         .remove_chanctx = mac80211_hwsim_remove_chanctx,
2339         .change_chanctx = mac80211_hwsim_change_chanctx,
2340         .assign_vif_chanctx = mac80211_hwsim_assign_vif_chanctx,
2341         .unassign_vif_chanctx = mac80211_hwsim_unassign_vif_chanctx,
2342 };
2343
2344 struct hwsim_new_radio_params {
2345         unsigned int channels;
2346         const char *reg_alpha2;
2347         const struct ieee80211_regdomain *regd;
2348         bool reg_strict;
2349         bool p2p_device;
2350         bool use_chanctx;
2351         bool destroy_on_close;
2352         const char *hwname;
2353         bool no_vif;
2354 };
2355
2356 static void hwsim_mcast_config_msg(struct sk_buff *mcast_skb,
2357                                    struct genl_info *info)
2358 {
2359         if (info)
2360                 genl_notify(&hwsim_genl_family, mcast_skb, info,
2361                             HWSIM_MCGRP_CONFIG, GFP_KERNEL);
2362         else
2363                 genlmsg_multicast(&hwsim_genl_family, mcast_skb, 0,
2364                                   HWSIM_MCGRP_CONFIG, GFP_KERNEL);
2365 }
2366
2367 static int append_radio_msg(struct sk_buff *skb, int id,
2368                             struct hwsim_new_radio_params *param)
2369 {
2370         int ret;
2371
2372         ret = nla_put_u32(skb, HWSIM_ATTR_RADIO_ID, id);
2373         if (ret < 0)
2374                 return ret;
2375
2376         if (param->channels) {
2377                 ret = nla_put_u32(skb, HWSIM_ATTR_CHANNELS, param->channels);
2378                 if (ret < 0)
2379                         return ret;
2380         }
2381
2382         if (param->reg_alpha2) {
2383                 ret = nla_put(skb, HWSIM_ATTR_REG_HINT_ALPHA2, 2,
2384                               param->reg_alpha2);
2385                 if (ret < 0)
2386                         return ret;
2387         }
2388
2389         if (param->regd) {
2390                 int i;
2391
2392                 for (i = 0; i < ARRAY_SIZE(hwsim_world_regdom_custom); i++) {
2393                         if (hwsim_world_regdom_custom[i] != param->regd)
2394                                 continue;
2395
2396                         ret = nla_put_u32(skb, HWSIM_ATTR_REG_CUSTOM_REG, i);
2397                         if (ret < 0)
2398                                 return ret;
2399                         break;
2400                 }
2401         }
2402
2403         if (param->reg_strict) {
2404                 ret = nla_put_flag(skb, HWSIM_ATTR_REG_STRICT_REG);
2405                 if (ret < 0)
2406                         return ret;
2407         }
2408
2409         if (param->p2p_device) {
2410                 ret = nla_put_flag(skb, HWSIM_ATTR_SUPPORT_P2P_DEVICE);
2411                 if (ret < 0)
2412                         return ret;
2413         }
2414
2415         if (param->use_chanctx) {
2416                 ret = nla_put_flag(skb, HWSIM_ATTR_USE_CHANCTX);
2417                 if (ret < 0)
2418                         return ret;
2419         }
2420
2421         if (param->hwname) {
2422                 ret = nla_put(skb, HWSIM_ATTR_RADIO_NAME,
2423                               strlen(param->hwname), param->hwname);
2424                 if (ret < 0)
2425                         return ret;
2426         }
2427
2428         return 0;
2429 }
2430
2431 static void hwsim_mcast_new_radio(int id, struct genl_info *info,
2432                                   struct hwsim_new_radio_params *param)
2433 {
2434         struct sk_buff *mcast_skb;
2435         void *data;
2436
2437         mcast_skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2438         if (!mcast_skb)
2439                 return;
2440
2441         data = genlmsg_put(mcast_skb, 0, 0, &hwsim_genl_family, 0,
2442                            HWSIM_CMD_NEW_RADIO);
2443         if (!data)
2444                 goto out_err;
2445
2446         if (append_radio_msg(mcast_skb, id, param) < 0)
2447                 goto out_err;
2448
2449         genlmsg_end(mcast_skb, data);
2450
2451         hwsim_mcast_config_msg(mcast_skb, info);
2452         return;
2453
2454 out_err:
2455         genlmsg_cancel(mcast_skb, data);
2456         nlmsg_free(mcast_skb);
2457 }
2458
2459 static int mac80211_hwsim_new_radio(struct genl_info *info,
2460                                     struct hwsim_new_radio_params *param)
2461 {
2462         int err;
2463         u8 addr[ETH_ALEN];
2464         struct mac80211_hwsim_data *data;
2465         struct ieee80211_hw *hw;
2466         enum nl80211_band band;
2467         const struct ieee80211_ops *ops = &mac80211_hwsim_ops;
2468         struct net *net;
2469         int idx;
2470
2471         if (WARN_ON(param->channels > 1 && !param->use_chanctx))
2472                 return -EINVAL;
2473
2474         spin_lock_bh(&hwsim_radio_lock);
2475         idx = hwsim_radio_idx++;
2476         spin_unlock_bh(&hwsim_radio_lock);
2477
2478         if (param->use_chanctx)
2479                 ops = &mac80211_hwsim_mchan_ops;
2480         hw = ieee80211_alloc_hw_nm(sizeof(*data), ops, param->hwname);
2481         if (!hw) {
2482                 pr_debug("mac80211_hwsim: ieee80211_alloc_hw failed\n");
2483                 err = -ENOMEM;
2484                 goto failed;
2485         }
2486
2487         /* ieee80211_alloc_hw_nm may have used a default name */
2488         param->hwname = wiphy_name(hw->wiphy);
2489
2490         if (info)
2491                 net = genl_info_net(info);
2492         else
2493                 net = &init_net;
2494         wiphy_net_set(hw->wiphy, net);
2495
2496         data = hw->priv;
2497         data->hw = hw;
2498
2499         data->dev = device_create(hwsim_class, NULL, 0, hw, "hwsim%d", idx);
2500         if (IS_ERR(data->dev)) {
2501                 printk(KERN_DEBUG
2502                        "mac80211_hwsim: device_create failed (%ld)\n",
2503                        PTR_ERR(data->dev));
2504                 err = -ENOMEM;
2505                 goto failed_drvdata;
2506         }
2507         data->dev->driver = &mac80211_hwsim_driver.driver;
2508         err = device_bind_driver(data->dev);
2509         if (err != 0) {
2510                 pr_debug("mac80211_hwsim: device_bind_driver failed (%d)\n",
2511                        err);
2512                 goto failed_bind;
2513         }
2514
2515         skb_queue_head_init(&data->pending);
2516
2517         SET_IEEE80211_DEV(hw, data->dev);
2518         eth_zero_addr(addr);
2519         addr[0] = 0x02;
2520         addr[3] = idx >> 8;
2521         addr[4] = idx;
2522         memcpy(data->addresses[0].addr, addr, ETH_ALEN);
2523         memcpy(data->addresses[1].addr, addr, ETH_ALEN);
2524         data->addresses[1].addr[0] |= 0x40;
2525         hw->wiphy->n_addresses = 2;
2526         hw->wiphy->addresses = data->addresses;
2527
2528         data->channels = param->channels;
2529         data->use_chanctx = param->use_chanctx;
2530         data->idx = idx;
2531         data->destroy_on_close = param->destroy_on_close;
2532         if (info)
2533                 data->portid = info->snd_portid;
2534
2535         if (data->use_chanctx) {
2536                 hw->wiphy->max_scan_ssids = 255;
2537                 hw->wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
2538                 hw->wiphy->max_remain_on_channel_duration = 1000;
2539                 hw->wiphy->iface_combinations = &data->if_combination;
2540                 if (param->p2p_device)
2541                         data->if_combination = hwsim_if_comb_p2p_dev[0];
2542                 else
2543                         data->if_combination = hwsim_if_comb[0];
2544                 hw->wiphy->n_iface_combinations = 1;
2545                 /* For channels > 1 DFS is not allowed */
2546                 data->if_combination.radar_detect_widths = 0;
2547                 data->if_combination.num_different_channels = data->channels;
2548         } else if (param->p2p_device) {
2549                 hw->wiphy->iface_combinations = hwsim_if_comb_p2p_dev;
2550                 hw->wiphy->n_iface_combinations =
2551                         ARRAY_SIZE(hwsim_if_comb_p2p_dev);
2552         } else {
2553                 hw->wiphy->iface_combinations = hwsim_if_comb;
2554                 hw->wiphy->n_iface_combinations = ARRAY_SIZE(hwsim_if_comb);
2555         }
2556
2557         INIT_DELAYED_WORK(&data->roc_start, hw_roc_start);
2558         INIT_DELAYED_WORK(&data->roc_done, hw_roc_done);
2559         INIT_DELAYED_WORK(&data->hw_scan, hw_scan_work);
2560
2561         hw->queues = 5;
2562         hw->offchannel_tx_hw_queue = 4;
2563         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
2564                                      BIT(NL80211_IFTYPE_AP) |
2565                                      BIT(NL80211_IFTYPE_P2P_CLIENT) |
2566                                      BIT(NL80211_IFTYPE_P2P_GO) |
2567                                      BIT(NL80211_IFTYPE_ADHOC) |
2568                                      BIT(NL80211_IFTYPE_MESH_POINT);
2569
2570         if (param->p2p_device)
2571                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_P2P_DEVICE);
2572
2573         ieee80211_hw_set(hw, SUPPORT_FAST_XMIT);
2574         ieee80211_hw_set(hw, CHANCTX_STA_CSA);
2575         ieee80211_hw_set(hw, SUPPORTS_HT_CCK_RATES);
2576         ieee80211_hw_set(hw, QUEUE_CONTROL);
2577         ieee80211_hw_set(hw, WANT_MONITOR_VIF);
2578         ieee80211_hw_set(hw, AMPDU_AGGREGATION);
2579         ieee80211_hw_set(hw, MFP_CAPABLE);
2580         ieee80211_hw_set(hw, SIGNAL_DBM);
2581         ieee80211_hw_set(hw, TDLS_WIDER_BW);
2582         if (rctbl)
2583                 ieee80211_hw_set(hw, SUPPORTS_RC_TABLE);
2584
2585         hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS |
2586                             WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL |
2587                             WIPHY_FLAG_AP_UAPSD |
2588                             WIPHY_FLAG_HAS_CHANNEL_SWITCH;
2589         hw->wiphy->features |= NL80211_FEATURE_ACTIVE_MONITOR |
2590                                NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE |
2591                                NL80211_FEATURE_STATIC_SMPS |
2592                                NL80211_FEATURE_DYNAMIC_SMPS |
2593                                NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR;
2594         wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_VHT_IBSS);
2595
2596         /* ask mac80211 to reserve space for magic */
2597         hw->vif_data_size = sizeof(struct hwsim_vif_priv);
2598         hw->sta_data_size = sizeof(struct hwsim_sta_priv);
2599         hw->chanctx_data_size = sizeof(struct hwsim_chanctx_priv);
2600
2601         memcpy(data->channels_2ghz, hwsim_channels_2ghz,
2602                 sizeof(hwsim_channels_2ghz));
2603         memcpy(data->channels_5ghz, hwsim_channels_5ghz,
2604                 sizeof(hwsim_channels_5ghz));
2605         memcpy(data->rates, hwsim_rates, sizeof(hwsim_rates));
2606
2607         for (band = NL80211_BAND_2GHZ; band < NUM_NL80211_BANDS; band++) {
2608                 struct ieee80211_supported_band *sband = &data->bands[band];
2609                 switch (band) {
2610                 case NL80211_BAND_2GHZ:
2611                         sband->channels = data->channels_2ghz;
2612                         sband->n_channels = ARRAY_SIZE(hwsim_channels_2ghz);
2613                         sband->bitrates = data->rates;
2614                         sband->n_bitrates = ARRAY_SIZE(hwsim_rates);
2615                         break;
2616                 case NL80211_BAND_5GHZ:
2617                         sband->channels = data->channels_5ghz;
2618                         sband->n_channels = ARRAY_SIZE(hwsim_channels_5ghz);
2619                         sband->bitrates = data->rates + 4;
2620                         sband->n_bitrates = ARRAY_SIZE(hwsim_rates) - 4;
2621
2622                         sband->vht_cap.vht_supported = true;
2623                         sband->vht_cap.cap =
2624                                 IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454 |
2625                                 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ |
2626                                 IEEE80211_VHT_CAP_RXLDPC |
2627                                 IEEE80211_VHT_CAP_SHORT_GI_80 |
2628                                 IEEE80211_VHT_CAP_SHORT_GI_160 |
2629                                 IEEE80211_VHT_CAP_TXSTBC |
2630                                 IEEE80211_VHT_CAP_RXSTBC_1 |
2631                                 IEEE80211_VHT_CAP_RXSTBC_2 |
2632                                 IEEE80211_VHT_CAP_RXSTBC_3 |
2633                                 IEEE80211_VHT_CAP_RXSTBC_4 |
2634                                 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
2635                         sband->vht_cap.vht_mcs.rx_mcs_map =
2636                                 cpu_to_le16(IEEE80211_VHT_MCS_SUPPORT_0_9 << 0 |
2637                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 2 |
2638                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 4 |
2639                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 6 |
2640                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 8 |
2641                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 10 |
2642                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 12 |
2643                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 14);
2644                         sband->vht_cap.vht_mcs.tx_mcs_map =
2645                                 sband->vht_cap.vht_mcs.rx_mcs_map;
2646                         break;
2647                 default:
2648                         continue;
2649                 }
2650
2651                 sband->ht_cap.ht_supported = true;
2652                 sband->ht_cap.cap = IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
2653                                     IEEE80211_HT_CAP_GRN_FLD |
2654                                     IEEE80211_HT_CAP_SGI_20 |
2655                                     IEEE80211_HT_CAP_SGI_40 |
2656                                     IEEE80211_HT_CAP_DSSSCCK40;
2657                 sband->ht_cap.ampdu_factor = 0x3;
2658                 sband->ht_cap.ampdu_density = 0x6;
2659                 memset(&sband->ht_cap.mcs, 0,
2660                        sizeof(sband->ht_cap.mcs));
2661                 sband->ht_cap.mcs.rx_mask[0] = 0xff;
2662                 sband->ht_cap.mcs.rx_mask[1] = 0xff;
2663                 sband->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
2664
2665                 hw->wiphy->bands[band] = sband;
2666         }
2667
2668         /* By default all radios belong to the first group */
2669         data->group = 1;
2670         mutex_init(&data->mutex);
2671
2672         data->netgroup = hwsim_net_get_netgroup(net);
2673
2674         /* Enable frame retransmissions for lossy channels */
2675         hw->max_rates = 4;
2676         hw->max_rate_tries = 11;
2677
2678         hw->wiphy->vendor_commands = mac80211_hwsim_vendor_commands;
2679         hw->wiphy->n_vendor_commands =
2680                 ARRAY_SIZE(mac80211_hwsim_vendor_commands);
2681         hw->wiphy->vendor_events = mac80211_hwsim_vendor_events;
2682         hw->wiphy->n_vendor_events = ARRAY_SIZE(mac80211_hwsim_vendor_events);
2683
2684         if (param->reg_strict)
2685                 hw->wiphy->regulatory_flags |= REGULATORY_STRICT_REG;
2686         if (param->regd) {
2687                 data->regd = param->regd;
2688                 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG;
2689                 wiphy_apply_custom_regulatory(hw->wiphy, param->regd);
2690                 /* give the regulatory workqueue a chance to run */
2691                 schedule_timeout_interruptible(1);
2692         }
2693
2694         if (param->no_vif)
2695                 ieee80211_hw_set(hw, NO_AUTO_VIF);
2696
2697         wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
2698
2699         err = ieee80211_register_hw(hw);
2700         if (err < 0) {
2701                 pr_debug("mac80211_hwsim: ieee80211_register_hw failed (%d)\n",
2702                        err);
2703                 goto failed_hw;
2704         }
2705
2706         wiphy_dbg(hw->wiphy, "hwaddr %pM registered\n", hw->wiphy->perm_addr);
2707
2708         if (param->reg_alpha2) {
2709                 data->alpha2[0] = param->reg_alpha2[0];
2710                 data->alpha2[1] = param->reg_alpha2[1];
2711                 regulatory_hint(hw->wiphy, param->reg_alpha2);
2712         }
2713
2714         data->debugfs = debugfs_create_dir("hwsim", hw->wiphy->debugfsdir);
2715         debugfs_create_file("ps", 0666, data->debugfs, data, &hwsim_fops_ps);
2716         debugfs_create_file("group", 0666, data->debugfs, data,
2717                             &hwsim_fops_group);
2718         if (!data->use_chanctx)
2719                 debugfs_create_file("dfs_simulate_radar", 0222,
2720                                     data->debugfs,
2721                                     data, &hwsim_simulate_radar);
2722
2723         tasklet_hrtimer_init(&data->beacon_timer,
2724                              mac80211_hwsim_beacon,
2725                              CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2726
2727         spin_lock_bh(&hwsim_radio_lock);
2728         list_add_tail(&data->list, &hwsim_radios);
2729         spin_unlock_bh(&hwsim_radio_lock);
2730
2731         if (idx > 0)
2732                 hwsim_mcast_new_radio(idx, info, param);
2733
2734         return idx;
2735
2736 failed_hw:
2737         device_release_driver(data->dev);
2738 failed_bind:
2739         device_unregister(data->dev);
2740 failed_drvdata:
2741         ieee80211_free_hw(hw);
2742 failed:
2743         return err;
2744 }
2745
2746 static void hwsim_mcast_del_radio(int id, const char *hwname,
2747                                   struct genl_info *info)
2748 {
2749         struct sk_buff *skb;
2750         void *data;
2751         int ret;
2752
2753         skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2754         if (!skb)
2755                 return;
2756
2757         data = genlmsg_put(skb, 0, 0, &hwsim_genl_family, 0,
2758                            HWSIM_CMD_DEL_RADIO);
2759         if (!data)
2760                 goto error;
2761
2762         ret = nla_put_u32(skb, HWSIM_ATTR_RADIO_ID, id);
2763         if (ret < 0)
2764                 goto error;
2765
2766         ret = nla_put(skb, HWSIM_ATTR_RADIO_NAME, strlen(hwname),
2767                       hwname);
2768         if (ret < 0)
2769                 goto error;
2770
2771         genlmsg_end(skb, data);
2772
2773         hwsim_mcast_config_msg(skb, info);
2774
2775         return;
2776
2777 error:
2778         nlmsg_free(skb);
2779 }
2780
2781 static void mac80211_hwsim_del_radio(struct mac80211_hwsim_data *data,
2782                                      const char *hwname,
2783                                      struct genl_info *info)
2784 {
2785         hwsim_mcast_del_radio(data->idx, hwname, info);
2786         debugfs_remove_recursive(data->debugfs);
2787         ieee80211_unregister_hw(data->hw);
2788         device_release_driver(data->dev);
2789         device_unregister(data->dev);
2790         ieee80211_free_hw(data->hw);
2791 }
2792
2793 static int mac80211_hwsim_get_radio(struct sk_buff *skb,
2794                                     struct mac80211_hwsim_data *data,
2795                                     u32 portid, u32 seq,
2796                                     struct netlink_callback *cb, int flags)
2797 {
2798         void *hdr;
2799         struct hwsim_new_radio_params param = { };
2800         int res = -EMSGSIZE;
2801
2802         hdr = genlmsg_put(skb, portid, seq, &hwsim_genl_family, flags,
2803                           HWSIM_CMD_GET_RADIO);
2804         if (!hdr)
2805                 return -EMSGSIZE;
2806
2807         if (cb)
2808                 genl_dump_check_consistent(cb, hdr);
2809
2810         if (data->alpha2[0] && data->alpha2[1])
2811                 param.reg_alpha2 = data->alpha2;
2812
2813         param.reg_strict = !!(data->hw->wiphy->regulatory_flags &
2814                                         REGULATORY_STRICT_REG);
2815         param.p2p_device = !!(data->hw->wiphy->interface_modes &
2816                                         BIT(NL80211_IFTYPE_P2P_DEVICE));
2817         param.use_chanctx = data->use_chanctx;
2818         param.regd = data->regd;
2819         param.channels = data->channels;
2820         param.hwname = wiphy_name(data->hw->wiphy);
2821
2822         res = append_radio_msg(skb, data->idx, &param);
2823         if (res < 0)
2824                 goto out_err;
2825
2826         genlmsg_end(skb, hdr);
2827         return 0;
2828
2829 out_err:
2830         genlmsg_cancel(skb, hdr);
2831         return res;
2832 }
2833
2834 static void mac80211_hwsim_free(void)
2835 {
2836         struct mac80211_hwsim_data *data;
2837
2838         spin_lock_bh(&hwsim_radio_lock);
2839         while ((data = list_first_entry_or_null(&hwsim_radios,
2840                                                 struct mac80211_hwsim_data,
2841                                                 list))) {
2842                 list_del(&data->list);
2843                 spin_unlock_bh(&hwsim_radio_lock);
2844                 mac80211_hwsim_del_radio(data, wiphy_name(data->hw->wiphy),
2845                                          NULL);
2846                 spin_lock_bh(&hwsim_radio_lock);
2847         }
2848         spin_unlock_bh(&hwsim_radio_lock);
2849         class_destroy(hwsim_class);
2850 }
2851
2852 static const struct net_device_ops hwsim_netdev_ops = {
2853         .ndo_start_xmit         = hwsim_mon_xmit,
2854         .ndo_set_mac_address    = eth_mac_addr,
2855         .ndo_validate_addr      = eth_validate_addr,
2856 };
2857
2858 static void hwsim_mon_setup(struct net_device *dev)
2859 {
2860         dev->netdev_ops = &hwsim_netdev_ops;
2861         dev->needs_free_netdev = true;
2862         ether_setup(dev);
2863         dev->priv_flags |= IFF_NO_QUEUE;
2864         dev->type = ARPHRD_IEEE80211_RADIOTAP;
2865         eth_zero_addr(dev->dev_addr);
2866         dev->dev_addr[0] = 0x12;
2867 }
2868
2869 static struct mac80211_hwsim_data *get_hwsim_data_ref_from_addr(const u8 *addr)
2870 {
2871         struct mac80211_hwsim_data *data;
2872         bool _found = false;
2873
2874         spin_lock_bh(&hwsim_radio_lock);
2875         list_for_each_entry(data, &hwsim_radios, list) {
2876                 if (memcmp(data->addresses[1].addr, addr, ETH_ALEN) == 0) {
2877                         _found = true;
2878                         break;
2879                 }
2880         }
2881         spin_unlock_bh(&hwsim_radio_lock);
2882
2883         if (!_found)
2884                 return NULL;
2885
2886         return data;
2887 }
2888
2889 static void hwsim_register_wmediumd(struct net *net, u32 portid)
2890 {
2891         struct mac80211_hwsim_data *data;
2892
2893         hwsim_net_set_wmediumd(net, portid);
2894
2895         spin_lock_bh(&hwsim_radio_lock);
2896         list_for_each_entry(data, &hwsim_radios, list) {
2897                 if (data->netgroup == hwsim_net_get_netgroup(net))
2898                         data->wmediumd = portid;
2899         }
2900         spin_unlock_bh(&hwsim_radio_lock);
2901 }
2902
2903 static int hwsim_tx_info_frame_received_nl(struct sk_buff *skb_2,
2904                                            struct genl_info *info)
2905 {
2906
2907         struct ieee80211_hdr *hdr;
2908         struct mac80211_hwsim_data *data2;
2909         struct ieee80211_tx_info *txi;
2910         struct hwsim_tx_rate *tx_attempts;
2911         u64 ret_skb_cookie;
2912         struct sk_buff *skb, *tmp;
2913         const u8 *src;
2914         unsigned int hwsim_flags;
2915         int i;
2916         bool found = false;
2917
2918         if (!info->attrs[HWSIM_ATTR_ADDR_TRANSMITTER] ||
2919             !info->attrs[HWSIM_ATTR_FLAGS] ||
2920             !info->attrs[HWSIM_ATTR_COOKIE] ||
2921             !info->attrs[HWSIM_ATTR_SIGNAL] ||
2922             !info->attrs[HWSIM_ATTR_TX_INFO])
2923                 goto out;
2924
2925         src = (void *)nla_data(info->attrs[HWSIM_ATTR_ADDR_TRANSMITTER]);
2926         hwsim_flags = nla_get_u32(info->attrs[HWSIM_ATTR_FLAGS]);
2927         ret_skb_cookie = nla_get_u64(info->attrs[HWSIM_ATTR_COOKIE]);
2928
2929         data2 = get_hwsim_data_ref_from_addr(src);
2930         if (!data2)
2931                 goto out;
2932
2933         if (hwsim_net_get_netgroup(genl_info_net(info)) != data2->netgroup)
2934                 goto out;
2935
2936         if (info->snd_portid != data2->wmediumd)
2937                 goto out;
2938
2939         /* look for the skb matching the cookie passed back from user */
2940         skb_queue_walk_safe(&data2->pending, skb, tmp) {
2941                 u64 skb_cookie;
2942
2943                 txi = IEEE80211_SKB_CB(skb);
2944                 skb_cookie = (u64)(uintptr_t)txi->rate_driver_data[0];
2945
2946                 if (skb_cookie == ret_skb_cookie) {
2947                         skb_unlink(skb, &data2->pending);
2948                         found = true;
2949                         break;
2950                 }
2951         }
2952
2953         /* not found */
2954         if (!found)
2955                 goto out;
2956
2957         /* Tx info received because the frame was broadcasted on user space,
2958          so we get all the necessary info: tx attempts and skb control buff */
2959
2960         tx_attempts = (struct hwsim_tx_rate *)nla_data(
2961                        info->attrs[HWSIM_ATTR_TX_INFO]);
2962
2963         /* now send back TX status */
2964         txi = IEEE80211_SKB_CB(skb);
2965
2966         ieee80211_tx_info_clear_status(txi);
2967
2968         for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
2969                 txi->status.rates[i].idx = tx_attempts[i].idx;
2970                 txi->status.rates[i].count = tx_attempts[i].count;
2971                 /*txi->status.rates[i].flags = 0;*/
2972         }
2973
2974         txi->status.ack_signal = nla_get_u32(info->attrs[HWSIM_ATTR_SIGNAL]);
2975
2976         if (!(hwsim_flags & HWSIM_TX_CTL_NO_ACK) &&
2977            (hwsim_flags & HWSIM_TX_STAT_ACK)) {
2978                 if (skb->len >= 16) {
2979                         hdr = (struct ieee80211_hdr *) skb->data;
2980                         mac80211_hwsim_monitor_ack(data2->channel,
2981                                                    hdr->addr2);
2982                 }
2983                 txi->flags |= IEEE80211_TX_STAT_ACK;
2984         }
2985         ieee80211_tx_status_irqsafe(data2->hw, skb);
2986         return 0;
2987 out:
2988         return -EINVAL;
2989
2990 }
2991
2992 static int hwsim_cloned_frame_received_nl(struct sk_buff *skb_2,
2993                                           struct genl_info *info)
2994 {
2995         struct mac80211_hwsim_data *data2;
2996         struct ieee80211_rx_status rx_status;
2997         const u8 *dst;
2998         int frame_data_len;
2999         void *frame_data;
3000         struct sk_buff *skb = NULL;
3001
3002         if (!info->attrs[HWSIM_ATTR_ADDR_RECEIVER] ||
3003             !info->attrs[HWSIM_ATTR_FRAME] ||
3004             !info->attrs[HWSIM_ATTR_RX_RATE] ||
3005             !info->attrs[HWSIM_ATTR_SIGNAL])
3006                 goto out;
3007
3008         dst = (void *)nla_data(info->attrs[HWSIM_ATTR_ADDR_RECEIVER]);
3009         frame_data_len = nla_len(info->attrs[HWSIM_ATTR_FRAME]);
3010         frame_data = (void *)nla_data(info->attrs[HWSIM_ATTR_FRAME]);
3011
3012         /* Allocate new skb here */
3013         skb = alloc_skb(frame_data_len, GFP_KERNEL);
3014         if (skb == NULL)
3015                 goto err;
3016
3017         if (frame_data_len > IEEE80211_MAX_DATA_LEN)
3018                 goto err;
3019
3020         /* Copy the data */
3021         skb_put_data(skb, frame_data, frame_data_len);
3022
3023         data2 = get_hwsim_data_ref_from_addr(dst);
3024         if (!data2)
3025                 goto out;
3026
3027         if (hwsim_net_get_netgroup(genl_info_net(info)) != data2->netgroup)
3028                 goto out;
3029
3030         if (info->snd_portid != data2->wmediumd)
3031                 goto out;
3032
3033         /* check if radio is configured properly */
3034
3035         if (data2->idle || !data2->started)
3036                 goto out;
3037
3038         /* A frame is received from user space */
3039         memset(&rx_status, 0, sizeof(rx_status));
3040         if (info->attrs[HWSIM_ATTR_FREQ]) {
3041                 /* throw away off-channel packets, but allow both the temporary
3042                  * ("hw" scan/remain-on-channel) and regular channel, since the
3043                  * internal datapath also allows this
3044                  */
3045                 mutex_lock(&data2->mutex);
3046                 rx_status.freq = nla_get_u32(info->attrs[HWSIM_ATTR_FREQ]);
3047
3048                 if (rx_status.freq != data2->channel->center_freq &&
3049                     (!data2->tmp_chan ||
3050                      rx_status.freq != data2->tmp_chan->center_freq)) {
3051                         mutex_unlock(&data2->mutex);
3052                         goto out;
3053                 }
3054                 mutex_unlock(&data2->mutex);
3055         } else {
3056                 rx_status.freq = data2->channel->center_freq;
3057         }
3058
3059         rx_status.band = data2->channel->band;
3060         rx_status.rate_idx = nla_get_u32(info->attrs[HWSIM_ATTR_RX_RATE]);
3061         rx_status.signal = nla_get_u32(info->attrs[HWSIM_ATTR_SIGNAL]);
3062
3063         memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
3064         data2->rx_pkts++;
3065         data2->rx_bytes += skb->len;
3066         ieee80211_rx_irqsafe(data2->hw, skb);
3067
3068         return 0;
3069 err:
3070         pr_debug("mac80211_hwsim: error occurred in %s\n", __func__);
3071 out:
3072         dev_kfree_skb(skb);
3073         return -EINVAL;
3074 }
3075
3076 static int hwsim_register_received_nl(struct sk_buff *skb_2,
3077                                       struct genl_info *info)
3078 {
3079         struct net *net = genl_info_net(info);
3080         struct mac80211_hwsim_data *data;
3081         int chans = 1;
3082
3083         spin_lock_bh(&hwsim_radio_lock);
3084         list_for_each_entry(data, &hwsim_radios, list)
3085                 chans = max(chans, data->channels);
3086         spin_unlock_bh(&hwsim_radio_lock);
3087
3088         /* In the future we should revise the userspace API and allow it
3089          * to set a flag that it does support multi-channel, then we can
3090          * let this pass conditionally on the flag.
3091          * For current userspace, prohibit it since it won't work right.
3092          */
3093         if (chans > 1)
3094                 return -EOPNOTSUPP;
3095
3096         if (hwsim_net_get_wmediumd(net))
3097                 return -EBUSY;
3098
3099         hwsim_register_wmediumd(net, info->snd_portid);
3100
3101         pr_debug("mac80211_hwsim: received a REGISTER, "
3102                "switching to wmediumd mode with pid %d\n", info->snd_portid);
3103
3104         return 0;
3105 }
3106
3107 static int hwsim_new_radio_nl(struct sk_buff *msg, struct genl_info *info)
3108 {
3109         struct hwsim_new_radio_params param = { 0 };
3110         const char *hwname = NULL;
3111         int ret;
3112
3113         param.reg_strict = info->attrs[HWSIM_ATTR_REG_STRICT_REG];
3114         param.p2p_device = info->attrs[HWSIM_ATTR_SUPPORT_P2P_DEVICE];
3115         param.channels = channels;
3116         param.destroy_on_close =
3117                 info->attrs[HWSIM_ATTR_DESTROY_RADIO_ON_CLOSE];
3118
3119         if (info->attrs[HWSIM_ATTR_CHANNELS])
3120                 param.channels = nla_get_u32(info->attrs[HWSIM_ATTR_CHANNELS]);
3121
3122         if (info->attrs[HWSIM_ATTR_NO_VIF])
3123                 param.no_vif = true;
3124
3125         if (info->attrs[HWSIM_ATTR_RADIO_NAME]) {
3126                 hwname = kasprintf(GFP_KERNEL, "%.*s",
3127                                    nla_len(info->attrs[HWSIM_ATTR_RADIO_NAME]),
3128                                    (char *)nla_data(info->attrs[HWSIM_ATTR_RADIO_NAME]));
3129                 if (!hwname)
3130                         return -ENOMEM;
3131                 param.hwname = hwname;
3132         }
3133
3134         if (info->attrs[HWSIM_ATTR_USE_CHANCTX])
3135                 param.use_chanctx = true;
3136         else
3137                 param.use_chanctx = (param.channels > 1);
3138
3139         if (info->attrs[HWSIM_ATTR_REG_HINT_ALPHA2])
3140                 param.reg_alpha2 =
3141                         nla_data(info->attrs[HWSIM_ATTR_REG_HINT_ALPHA2]);
3142
3143         if (info->attrs[HWSIM_ATTR_REG_CUSTOM_REG]) {
3144                 u32 idx = nla_get_u32(info->attrs[HWSIM_ATTR_REG_CUSTOM_REG]);
3145
3146                 if (idx >= ARRAY_SIZE(hwsim_world_regdom_custom))
3147                         return -EINVAL;
3148                 param.regd = hwsim_world_regdom_custom[idx];
3149         }
3150
3151         ret = mac80211_hwsim_new_radio(info, &param);
3152         kfree(hwname);
3153         return ret;
3154 }
3155
3156 static int hwsim_del_radio_nl(struct sk_buff *msg, struct genl_info *info)
3157 {
3158         struct mac80211_hwsim_data *data;
3159         s64 idx = -1;
3160         const char *hwname = NULL;
3161
3162         if (info->attrs[HWSIM_ATTR_RADIO_ID]) {
3163                 idx = nla_get_u32(info->attrs[HWSIM_ATTR_RADIO_ID]);
3164         } else if (info->attrs[HWSIM_ATTR_RADIO_NAME]) {
3165                 hwname = kasprintf(GFP_KERNEL, "%.*s",
3166                                    nla_len(info->attrs[HWSIM_ATTR_RADIO_NAME]),
3167                                    (char *)nla_data(info->attrs[HWSIM_ATTR_RADIO_NAME]));
3168                 if (!hwname)
3169                         return -ENOMEM;
3170         } else
3171                 return -EINVAL;
3172
3173         spin_lock_bh(&hwsim_radio_lock);
3174         list_for_each_entry(data, &hwsim_radios, list) {
3175                 if (idx >= 0) {
3176                         if (data->idx != idx)
3177                                 continue;
3178                 } else {
3179                         if (!hwname ||
3180                             strcmp(hwname, wiphy_name(data->hw->wiphy)))
3181                                 continue;
3182                 }
3183
3184                 if (!net_eq(wiphy_net(data->hw->wiphy), genl_info_net(info)))
3185                         continue;
3186
3187                 list_del(&data->list);
3188                 spin_unlock_bh(&hwsim_radio_lock);
3189                 mac80211_hwsim_del_radio(data, wiphy_name(data->hw->wiphy),
3190                                          info);
3191                 kfree(hwname);
3192                 return 0;
3193         }
3194         spin_unlock_bh(&hwsim_radio_lock);
3195
3196         kfree(hwname);
3197         return -ENODEV;
3198 }
3199
3200 static int hwsim_get_radio_nl(struct sk_buff *msg, struct genl_info *info)
3201 {
3202         struct mac80211_hwsim_data *data;
3203         struct sk_buff *skb;
3204         int idx, res = -ENODEV;
3205
3206         if (!info->attrs[HWSIM_ATTR_RADIO_ID])
3207                 return -EINVAL;
3208         idx = nla_get_u32(info->attrs[HWSIM_ATTR_RADIO_ID]);
3209
3210         spin_lock_bh(&hwsim_radio_lock);
3211         list_for_each_entry(data, &hwsim_radios, list) {
3212                 if (data->idx != idx)
3213                         continue;
3214
3215                 if (!net_eq(wiphy_net(data->hw->wiphy), genl_info_net(info)))
3216                         continue;
3217
3218                 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3219                 if (!skb) {
3220                         res = -ENOMEM;
3221                         goto out_err;
3222                 }
3223
3224                 res = mac80211_hwsim_get_radio(skb, data, info->snd_portid,
3225                                                info->snd_seq, NULL, 0);
3226                 if (res < 0) {
3227                         nlmsg_free(skb);
3228                         goto out_err;
3229                 }
3230
3231                 genlmsg_reply(skb, info);
3232                 break;
3233         }
3234
3235 out_err:
3236         spin_unlock_bh(&hwsim_radio_lock);
3237
3238         return res;
3239 }
3240
3241 static int hwsim_dump_radio_nl(struct sk_buff *skb,
3242                                struct netlink_callback *cb)
3243 {
3244         int idx = cb->args[0];
3245         struct mac80211_hwsim_data *data = NULL;
3246         int res;
3247
3248         spin_lock_bh(&hwsim_radio_lock);
3249
3250         if (idx == hwsim_radio_idx)
3251                 goto done;
3252
3253         list_for_each_entry(data, &hwsim_radios, list) {
3254                 if (data->idx < idx)
3255                         continue;
3256
3257                 if (!net_eq(wiphy_net(data->hw->wiphy), sock_net(skb->sk)))
3258                         continue;
3259
3260                 res = mac80211_hwsim_get_radio(skb, data,
3261                                                NETLINK_CB(cb->skb).portid,
3262                                                cb->nlh->nlmsg_seq, cb,
3263                                                NLM_F_MULTI);
3264                 if (res < 0)
3265                         break;
3266
3267                 idx = data->idx + 1;
3268         }
3269
3270         cb->args[0] = idx;
3271
3272 done:
3273         spin_unlock_bh(&hwsim_radio_lock);
3274         return skb->len;
3275 }
3276
3277 /* Generic Netlink operations array */
3278 static const struct genl_ops hwsim_ops[] = {
3279         {
3280                 .cmd = HWSIM_CMD_REGISTER,
3281                 .policy = hwsim_genl_policy,
3282                 .doit = hwsim_register_received_nl,
3283                 .flags = GENL_UNS_ADMIN_PERM,
3284         },
3285         {
3286                 .cmd = HWSIM_CMD_FRAME,
3287                 .policy = hwsim_genl_policy,
3288                 .doit = hwsim_cloned_frame_received_nl,
3289         },
3290         {
3291                 .cmd = HWSIM_CMD_TX_INFO_FRAME,
3292                 .policy = hwsim_genl_policy,
3293                 .doit = hwsim_tx_info_frame_received_nl,
3294         },
3295         {
3296                 .cmd = HWSIM_CMD_NEW_RADIO,
3297                 .policy = hwsim_genl_policy,
3298                 .doit = hwsim_new_radio_nl,
3299                 .flags = GENL_UNS_ADMIN_PERM,
3300         },
3301         {
3302                 .cmd = HWSIM_CMD_DEL_RADIO,
3303                 .policy = hwsim_genl_policy,
3304                 .doit = hwsim_del_radio_nl,
3305                 .flags = GENL_UNS_ADMIN_PERM,
3306         },
3307         {
3308                 .cmd = HWSIM_CMD_GET_RADIO,
3309                 .policy = hwsim_genl_policy,
3310                 .doit = hwsim_get_radio_nl,
3311                 .dumpit = hwsim_dump_radio_nl,
3312         },
3313 };
3314
3315 static struct genl_family hwsim_genl_family __ro_after_init = {
3316         .name = "MAC80211_HWSIM",
3317         .version = 1,
3318         .maxattr = HWSIM_ATTR_MAX,
3319         .netnsok = true,
3320         .module = THIS_MODULE,
3321         .ops = hwsim_ops,
3322         .n_ops = ARRAY_SIZE(hwsim_ops),
3323         .mcgrps = hwsim_mcgrps,
3324         .n_mcgrps = ARRAY_SIZE(hwsim_mcgrps),
3325 };
3326
3327 static void destroy_radio(struct work_struct *work)
3328 {
3329         struct mac80211_hwsim_data *data =
3330                 container_of(work, struct mac80211_hwsim_data, destroy_work);
3331
3332         mac80211_hwsim_del_radio(data, wiphy_name(data->hw->wiphy), NULL);
3333 }
3334
3335 static void remove_user_radios(u32 portid)
3336 {
3337         struct mac80211_hwsim_data *entry, *tmp;
3338
3339         spin_lock_bh(&hwsim_radio_lock);
3340         list_for_each_entry_safe(entry, tmp, &hwsim_radios, list) {
3341                 if (entry->destroy_on_close && entry->portid == portid) {
3342                         list_del(&entry->list);
3343                         INIT_WORK(&entry->destroy_work, destroy_radio);
3344                         schedule_work(&entry->destroy_work);
3345                 }
3346         }
3347         spin_unlock_bh(&hwsim_radio_lock);
3348 }
3349
3350 static int mac80211_hwsim_netlink_notify(struct notifier_block *nb,
3351                                          unsigned long state,
3352                                          void *_notify)
3353 {
3354         struct netlink_notify *notify = _notify;
3355
3356         if (state != NETLINK_URELEASE)
3357                 return NOTIFY_DONE;
3358
3359         remove_user_radios(notify->portid);
3360
3361         if (notify->portid == hwsim_net_get_wmediumd(notify->net)) {
3362                 printk(KERN_INFO "mac80211_hwsim: wmediumd released netlink"
3363                        " socket, switching to perfect channel medium\n");
3364                 hwsim_register_wmediumd(notify->net, 0);
3365         }
3366         return NOTIFY_DONE;
3367
3368 }
3369
3370 static struct notifier_block hwsim_netlink_notifier = {
3371         .notifier_call = mac80211_hwsim_netlink_notify,
3372 };
3373
3374 static int __init hwsim_init_netlink(void)
3375 {
3376         int rc;
3377
3378         printk(KERN_INFO "mac80211_hwsim: initializing netlink\n");
3379
3380         rc = genl_register_family(&hwsim_genl_family);
3381         if (rc)
3382                 goto failure;
3383
3384         rc = netlink_register_notifier(&hwsim_netlink_notifier);
3385         if (rc) {
3386                 genl_unregister_family(&hwsim_genl_family);
3387                 goto failure;
3388         }
3389
3390         return 0;
3391
3392 failure:
3393         pr_debug("mac80211_hwsim: error occurred in %s\n", __func__);
3394         return -EINVAL;
3395 }
3396
3397 static __net_init int hwsim_init_net(struct net *net)
3398 {
3399         hwsim_net_set_netgroup(net);
3400
3401         return 0;
3402 }
3403
3404 static void __net_exit hwsim_exit_net(struct net *net)
3405 {
3406         struct mac80211_hwsim_data *data, *tmp;
3407
3408         spin_lock_bh(&hwsim_radio_lock);
3409         list_for_each_entry_safe(data, tmp, &hwsim_radios, list) {
3410                 if (!net_eq(wiphy_net(data->hw->wiphy), net))
3411                         continue;
3412
3413                 /* Radios created in init_net are returned to init_net. */
3414                 if (data->netgroup == hwsim_net_get_netgroup(&init_net))
3415                         continue;
3416
3417                 list_del(&data->list);
3418                 INIT_WORK(&data->destroy_work, destroy_radio);
3419                 schedule_work(&data->destroy_work);
3420         }
3421         spin_unlock_bh(&hwsim_radio_lock);
3422 }
3423
3424 static struct pernet_operations hwsim_net_ops = {
3425         .init = hwsim_init_net,
3426         .exit = hwsim_exit_net,
3427         .id   = &hwsim_net_id,
3428         .size = sizeof(struct hwsim_net),
3429 };
3430
3431 static void hwsim_exit_netlink(void)
3432 {
3433         /* unregister the notifier */
3434         netlink_unregister_notifier(&hwsim_netlink_notifier);
3435         /* unregister the family */
3436         genl_unregister_family(&hwsim_genl_family);
3437 }
3438
3439 static int __init init_mac80211_hwsim(void)
3440 {
3441         int i, err;
3442
3443         if (radios < 0 || radios > 100)
3444                 return -EINVAL;
3445
3446         if (channels < 1)
3447                 return -EINVAL;
3448
3449         spin_lock_init(&hwsim_radio_lock);
3450
3451         err = register_pernet_device(&hwsim_net_ops);
3452         if (err)
3453                 return err;
3454
3455         err = platform_driver_register(&mac80211_hwsim_driver);
3456         if (err)
3457                 goto out_unregister_pernet;
3458
3459         hwsim_class = class_create(THIS_MODULE, "mac80211_hwsim");
3460         if (IS_ERR(hwsim_class)) {
3461                 err = PTR_ERR(hwsim_class);
3462                 goto out_unregister_driver;
3463         }
3464
3465         err = hwsim_init_netlink();
3466         if (err < 0)
3467                 goto out_unregister_driver;
3468
3469         for (i = 0; i < radios; i++) {
3470                 struct hwsim_new_radio_params param = { 0 };
3471
3472                 param.channels = channels;
3473
3474                 switch (regtest) {
3475                 case HWSIM_REGTEST_DIFF_COUNTRY:
3476                         if (i < ARRAY_SIZE(hwsim_alpha2s))
3477                                 param.reg_alpha2 = hwsim_alpha2s[i];
3478                         break;
3479                 case HWSIM_REGTEST_DRIVER_REG_FOLLOW:
3480                         if (!i)
3481                                 param.reg_alpha2 = hwsim_alpha2s[0];
3482                         break;
3483                 case HWSIM_REGTEST_STRICT_ALL:
3484                         param.reg_strict = true;
3485                 case HWSIM_REGTEST_DRIVER_REG_ALL:
3486                         param.reg_alpha2 = hwsim_alpha2s[0];
3487                         break;
3488                 case HWSIM_REGTEST_WORLD_ROAM:
3489                         if (i == 0)
3490                                 param.regd = &hwsim_world_regdom_custom_01;
3491                         break;
3492                 case HWSIM_REGTEST_CUSTOM_WORLD:
3493                         param.regd = &hwsim_world_regdom_custom_01;
3494                         break;
3495                 case HWSIM_REGTEST_CUSTOM_WORLD_2:
3496                         if (i == 0)
3497                                 param.regd = &hwsim_world_regdom_custom_01;
3498                         else if (i == 1)
3499                                 param.regd = &hwsim_world_regdom_custom_02;
3500                         break;
3501                 case HWSIM_REGTEST_STRICT_FOLLOW:
3502                         if (i == 0) {
3503                                 param.reg_strict = true;
3504                                 param.reg_alpha2 = hwsim_alpha2s[0];
3505                         }
3506                         break;
3507                 case HWSIM_REGTEST_STRICT_AND_DRIVER_REG:
3508                         if (i == 0) {
3509                                 param.reg_strict = true;
3510                                 param.reg_alpha2 = hwsim_alpha2s[0];
3511                         } else if (i == 1) {
3512                                 param.reg_alpha2 = hwsim_alpha2s[1];
3513                         }
3514                         break;
3515                 case HWSIM_REGTEST_ALL:
3516                         switch (i) {
3517                         case 0:
3518                                 param.regd = &hwsim_world_regdom_custom_01;
3519                                 break;
3520                         case 1:
3521                                 param.regd = &hwsim_world_regdom_custom_02;
3522                                 break;
3523                         case 2:
3524                                 param.reg_alpha2 = hwsim_alpha2s[0];
3525                                 break;
3526                         case 3:
3527                                 param.reg_alpha2 = hwsim_alpha2s[1];
3528                                 break;
3529                         case 4:
3530                                 param.reg_strict = true;
3531                                 param.reg_alpha2 = hwsim_alpha2s[2];
3532                                 break;
3533                         }
3534                         break;
3535                 default:
3536                         break;
3537                 }
3538
3539                 param.p2p_device = support_p2p_device;
3540                 param.use_chanctx = channels > 1;
3541
3542                 err = mac80211_hwsim_new_radio(NULL, &param);
3543                 if (err < 0)
3544                         goto out_free_radios;
3545         }
3546
3547         hwsim_mon = alloc_netdev(0, "hwsim%d", NET_NAME_UNKNOWN,
3548                                  hwsim_mon_setup);
3549         if (hwsim_mon == NULL) {
3550                 err = -ENOMEM;
3551                 goto out_free_radios;
3552         }
3553
3554         rtnl_lock();
3555         err = dev_alloc_name(hwsim_mon, hwsim_mon->name);
3556         if (err < 0) {
3557                 rtnl_unlock();
3558                 goto out_free_radios;
3559         }
3560
3561         err = register_netdevice(hwsim_mon);
3562         if (err < 0) {
3563                 rtnl_unlock();
3564                 goto out_free_mon;
3565         }
3566         rtnl_unlock();
3567
3568         return 0;
3569
3570 out_free_mon:
3571         free_netdev(hwsim_mon);
3572 out_free_radios:
3573         mac80211_hwsim_free();
3574 out_unregister_driver:
3575         platform_driver_unregister(&mac80211_hwsim_driver);
3576 out_unregister_pernet:
3577         unregister_pernet_device(&hwsim_net_ops);
3578         return err;
3579 }
3580 module_init(init_mac80211_hwsim);
3581
3582 static void __exit exit_mac80211_hwsim(void)
3583 {
3584         pr_debug("mac80211_hwsim: unregister radios\n");
3585
3586         hwsim_exit_netlink();
3587
3588         mac80211_hwsim_free();
3589         unregister_netdev(hwsim_mon);
3590         platform_driver_unregister(&mac80211_hwsim_driver);
3591         unregister_pernet_device(&hwsim_net_ops);
3592 }
3593 module_exit(exit_mac80211_hwsim);