drivers/net/wireless/mac80211_hwsim.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * mac80211_hwsim - software simulator of 802.11 radio(s) for mac80211
   4  * Copyright (c) 2008, Jouni Malinen <j@w1.fi>
   5  * Copyright (c) 2011, Javier Lopez <jlopex@gmail.com>
   6  * Copyright (c) 2016 - 2017 Intel Deutschland GmbH
   7  * Copyright (C) 2018 Intel Corporation
   8  */
   9
  10 /*
  11  * TODO:
  12  * - Add TSF sync and fix IBSS beacon transmission by adding
  13  *   competition for "air time" at TBTT
  14  * - RX filtering based on filter configuration (data->rx_filter)
  15  */
  16
  17 #include <linux/list.h>
  18 #include <linux/slab.h>
  19 #include <linux/spinlock.h>
  20 #include <net/dst.h>
  21 #include <net/xfrm.h>
  22 #include <net/mac80211.h>
  23 #include <net/ieee80211_radiotap.h>
  24 #include <linux/if_arp.h>
  25 #include <linux/rtnetlink.h>
  26 #include <linux/etherdevice.h>
  27 #include <linux/platform_device.h>
  28 #include <linux/debugfs.h>
  29 #include <linux/module.h>
  30 #include <linux/ktime.h>
  31 #include <net/genetlink.h>
  32 #include <net/net_namespace.h>
  33 #include <net/netns/generic.h>
  34 #include <linux/rhashtable.h>
  35 #include <linux/nospec.h>
  36 #include "mac80211_hwsim.h"
  37
  38 #define WARN_QUEUE 100
  39 #define MAX_QUEUE 200
  40
  41 MODULE_AUTHOR("Jouni Malinen");
  42 MODULE_DESCRIPTION("Software simulator of 802.11 radio(s) for mac80211");
  43 MODULE_LICENSE("GPL");
  44
  45 static int radios = 2;
  46 module_param(radios, int, 0444);
  47 MODULE_PARM_DESC(radios, "Number of simulated radios");
  48
  49 static int channels = 1;
  50 module_param(channels, int, 0444);
  51 MODULE_PARM_DESC(channels, "Number of concurrent channels");
  52
  53 static bool paged_rx = false;
  54 module_param(paged_rx, bool, 0644);
  55 MODULE_PARM_DESC(paged_rx, "Use paged SKBs for RX instead of linear ones");
  56
  57 static bool rctbl = false;
  58 module_param(rctbl, bool, 0444);
  59 MODULE_PARM_DESC(rctbl, "Handle rate control table");
  60
  61 static bool support_p2p_device = true;
  62 module_param(support_p2p_device, bool, 0444);
  63 MODULE_PARM_DESC(support_p2p_device, "Support P2P-Device interface type");
  64
  65 /**
  66  * enum hwsim_regtest - the type of regulatory tests we offer
  67  *
  68  * These are the different values you can use for the regtest
  69  * module parameter. This is useful to help test world roaming
  70  * and the driver regulatory_hint() call and combinations of these.
  71  * If you want to do specific alpha2 regulatory domain tests simply
  72  * use the userspace regulatory request as that will be respected as
  73  * well without the need of this module parameter. This is designed
  74  * only for testing the driver regulatory request, world roaming
  75  * and all possible combinations.
  76  *
  77  * @HWSIM_REGTEST_DISABLED: No regulatory tests are performed,
  78  *      this is the default value.
  79  * @HWSIM_REGTEST_DRIVER_REG_FOLLOW: Used for testing the driver regulatory
  80  *      hint, only one driver regulatory hint will be sent as such the
  81  *      secondary radios are expected to follow.
  82  * @HWSIM_REGTEST_DRIVER_REG_ALL: Used for testing the driver regulatory
  83  *      request with all radios reporting the same regulatory domain.
  84  * @HWSIM_REGTEST_DIFF_COUNTRY: Used for testing the drivers calling
  85  *      different regulatory domains requests. Expected behaviour is for
  86  *      an intersection to occur but each device will still use their
  87  *      respective regulatory requested domains. Subsequent radios will
  88  *      use the resulting intersection.
  89  * @HWSIM_REGTEST_WORLD_ROAM: Used for testing the world roaming. We accomplish
  90  *      this by using a custom beacon-capable regulatory domain for the first
  91  *      radio. All other device world roam.
  92  * @HWSIM_REGTEST_CUSTOM_WORLD: Used for testing the custom world regulatory
  93  *      domain requests. All radios will adhere to this custom world regulatory
  94  *      domain.
  95  * @HWSIM_REGTEST_CUSTOM_WORLD_2: Used for testing 2 custom world regulatory
  96  *      domain requests. The first radio will adhere to the first custom world
  97  *      regulatory domain, the second one to the second custom world regulatory
  98  *      domain. All other devices will world roam.
  99  * @HWSIM_REGTEST_STRICT_FOLLOW_: Used for testing strict regulatory domain
 100  *      settings, only the first radio will send a regulatory domain request
 101  *      and use strict settings. The rest of the radios are expected to follow.
 102  * @HWSIM_REGTEST_STRICT_ALL: Used for testing strict regulatory domain
 103  *      settings. All radios will adhere to this.
 104  * @HWSIM_REGTEST_STRICT_AND_DRIVER_REG: Used for testing strict regulatory
 105  *      domain settings, combined with secondary driver regulatory domain
 106  *      settings. The first radio will get a strict regulatory domain setting
 107  *      using the first driver regulatory request and the second radio will use
 108  *      non-strict settings using the second driver regulatory request. All
 109  *      other devices should follow the intersection created between the
 110  *      first two.
 111  * @HWSIM_REGTEST_ALL: Used for testing every possible mix. You will need
 112  *      at least 6 radios for a complete test. We will test in this order:
 113  *      1 - driver custom world regulatory domain
 114  *      2 - second custom world regulatory domain
 115  *      3 - first driver regulatory domain request
 116  *      4 - second driver regulatory domain request
 117  *      5 - strict regulatory domain settings using the third driver regulatory
 118  *          domain request
 119  *      6 and on - should follow the intersection of the 3rd, 4rth and 5th radio
 120  *                 regulatory requests.
 121  */
 122 enum hwsim_regtest {
 123         HWSIM_REGTEST_DISABLED = 0,
 124         HWSIM_REGTEST_DRIVER_REG_FOLLOW = 1,
 125         HWSIM_REGTEST_DRIVER_REG_ALL = 2,
 126         HWSIM_REGTEST_DIFF_COUNTRY = 3,
 127         HWSIM_REGTEST_WORLD_ROAM = 4,
 128         HWSIM_REGTEST_CUSTOM_WORLD = 5,
 129         HWSIM_REGTEST_CUSTOM_WORLD_2 = 6,
 130         HWSIM_REGTEST_STRICT_FOLLOW = 7,
 131         HWSIM_REGTEST_STRICT_ALL = 8,
 132         HWSIM_REGTEST_STRICT_AND_DRIVER_REG = 9,
 133         HWSIM_REGTEST_ALL = 10,
 134 };
 135
 136 /* Set to one of the HWSIM_REGTEST_* values above */
 137 static int regtest = HWSIM_REGTEST_DISABLED;
 138 module_param(regtest, int, 0444);
 139 MODULE_PARM_DESC(regtest, "The type of regulatory test we want to run");
 140
 141 static const char *hwsim_alpha2s[] = {
 142         "FI",
 143         "AL",
 144         "US",
 145         "DE",
 146         "JP",
 147         "AL",
 148 };
 149
 150 static const struct ieee80211_regdomain hwsim_world_regdom_custom_01 = {
 151         .n_reg_rules = 4,
 152         .alpha2 =  "99",
 153         .reg_rules = {
 154                 REG_RULE(2412-10, 2462+10, 40, 0, 20, 0),
 155                 REG_RULE(2484-10, 2484+10, 40, 0, 20, 0),
 156                 REG_RULE(5150-10, 5240+10, 40, 0, 30, 0),
 157                 REG_RULE(5745-10, 5825+10, 40, 0, 30, 0),
 158         }
 159 };
 160
 161 static const struct ieee80211_regdomain hwsim_world_regdom_custom_02 = {
 162         .n_reg_rules = 2,
 163         .alpha2 =  "99",
 164         .reg_rules = {
 165                 REG_RULE(2412-10, 2462+10, 40, 0, 20, 0),
 166                 REG_RULE(5725-10, 5850+10, 40, 0, 30,
 167                          NL80211_RRF_NO_IR),
 168         }
 169 };
 170
 171 static const struct ieee80211_regdomain *hwsim_world_regdom_custom[] = {
 172         &hwsim_world_regdom_custom_01,
 173         &hwsim_world_regdom_custom_02,
 174 };
 175
 176 struct hwsim_vif_priv {
 177         u32 magic;
 178         u8 bssid[ETH_ALEN];
 179         bool assoc;
 180         bool bcn_en;
 181         u16 aid;
 182 };
 183
 184 #define HWSIM_VIF_MAGIC 0x69537748
 185
 186 static inline void hwsim_check_magic(struct ieee80211_vif *vif)
 187 {
 188         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 189         WARN(vp->magic != HWSIM_VIF_MAGIC,
 190              "Invalid VIF (%p) magic %#x, %pM, %d/%d\n",
 191              vif, vp->magic, vif->addr, vif->type, vif->p2p);
 192 }
 193
 194 static inline void hwsim_set_magic(struct ieee80211_vif *vif)
 195 {
 196         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 197         vp->magic = HWSIM_VIF_MAGIC;
 198 }
 199
 200 static inline void hwsim_clear_magic(struct ieee80211_vif *vif)
 201 {
 202         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 203         vp->magic = 0;
 204 }
 205
 206 struct hwsim_sta_priv {
 207         u32 magic;
 208 };
 209
 210 #define HWSIM_STA_MAGIC 0x6d537749
 211
 212 static inline void hwsim_check_sta_magic(struct ieee80211_sta *sta)
 213 {
 214         struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
 215         WARN_ON(sp->magic != HWSIM_STA_MAGIC);
 216 }
 217
 218 static inline void hwsim_set_sta_magic(struct ieee80211_sta *sta)
 219 {
 220         struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
 221         sp->magic = HWSIM_STA_MAGIC;
 222 }
 223
 224 static inline void hwsim_clear_sta_magic(struct ieee80211_sta *sta)
 225 {
 226         struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
 227         sp->magic = 0;
 228 }
 229
 230 struct hwsim_chanctx_priv {
 231         u32 magic;
 232 };
 233
 234 #define HWSIM_CHANCTX_MAGIC 0x6d53774a
 235
 236 static inline void hwsim_check_chanctx_magic(struct ieee80211_chanctx_conf *c)
 237 {
 238         struct hwsim_chanctx_priv *cp = (void *)c->drv_priv;
 239         WARN_ON(cp->magic != HWSIM_CHANCTX_MAGIC);
 240 }
 241
 242 static inline void hwsim_set_chanctx_magic(struct ieee80211_chanctx_conf *c)
 243 {
 244         struct hwsim_chanctx_priv *cp = (void *)c->drv_priv;
 245         cp->magic = HWSIM_CHANCTX_MAGIC;
 246 }
 247
 248 static inline void hwsim_clear_chanctx_magic(struct ieee80211_chanctx_conf *c)
 249 {
 250         struct hwsim_chanctx_priv *cp = (void *)c->drv_priv;
 251         cp->magic = 0;
 252 }
 253
 254 static unsigned int hwsim_net_id;
 255
 256 static DEFINE_IDA(hwsim_netgroup_ida);
 257
 258 struct hwsim_net {
 259         int netgroup;
 260         u32 wmediumd;
 261 };
 262
 263 static inline int hwsim_net_get_netgroup(struct net *net)
 264 {
 265         struct hwsim_net *hwsim_net = net_generic(net, hwsim_net_id);
 266
 267         return hwsim_net->netgroup;
 268 }
 269
 270 static inline int hwsim_net_set_netgroup(struct net *net)
 271 {
 272         struct hwsim_net *hwsim_net = net_generic(net, hwsim_net_id);
 273
 274         hwsim_net->netgroup = ida_simple_get(&hwsim_netgroup_ida,
 275                                              0, 0, GFP_KERNEL);
 276         return hwsim_net->netgroup >= 0 ? 0 : -ENOMEM;
 277 }
 278
 279 static inline u32 hwsim_net_get_wmediumd(struct net *net)
 280 {
 281         struct hwsim_net *hwsim_net = net_generic(net, hwsim_net_id);
 282
 283         return hwsim_net->wmediumd;
 284 }
 285
 286 static inline void hwsim_net_set_wmediumd(struct net *net, u32 portid)
 287 {
 288         struct hwsim_net *hwsim_net = net_generic(net, hwsim_net_id);
 289
 290         hwsim_net->wmediumd = portid;
 291 }
 292
 293 static struct class *hwsim_class;
 294
 295 static struct net_device *hwsim_mon; /* global monitor netdev */
 296
 297 #define CHAN2G(_freq)  { \
 298         .band = NL80211_BAND_2GHZ, \
 299         .center_freq = (_freq), \
 300         .hw_value = (_freq), \
 301         .max_power = 20, \
 302 }
 303
 304 #define CHAN5G(_freq) { \
 305         .band = NL80211_BAND_5GHZ, \
 306         .center_freq = (_freq), \
 307         .hw_value = (_freq), \
 308         .max_power = 20, \
 309 }
 310
 311 static const struct ieee80211_channel hwsim_channels_2ghz[] = {
 312         CHAN2G(2412), /* Channel 1 */
 313         CHAN2G(2417), /* Channel 2 */
 314         CHAN2G(2422), /* Channel 3 */
 315         CHAN2G(2427), /* Channel 4 */
 316         CHAN2G(2432), /* Channel 5 */
 317         CHAN2G(2437), /* Channel 6 */
 318         CHAN2G(2442), /* Channel 7 */
 319         CHAN2G(2447), /* Channel 8 */
 320         CHAN2G(2452), /* Channel 9 */
 321         CHAN2G(2457), /* Channel 10 */
 322         CHAN2G(2462), /* Channel 11 */
 323         CHAN2G(2467), /* Channel 12 */
 324         CHAN2G(2472), /* Channel 13 */
 325         CHAN2G(2484), /* Channel 14 */
 326 };
 327
 328 static const struct ieee80211_channel hwsim_channels_5ghz[] = {
 329         CHAN5G(5180), /* Channel 36 */
 330         CHAN5G(5200), /* Channel 40 */
 331         CHAN5G(5220), /* Channel 44 */
 332         CHAN5G(5240), /* Channel 48 */
 333
 334         CHAN5G(5260), /* Channel 52 */
 335         CHAN5G(5280), /* Channel 56 */
 336         CHAN5G(5300), /* Channel 60 */
 337         CHAN5G(5320), /* Channel 64 */
 338
 339         CHAN5G(5500), /* Channel 100 */
 340         CHAN5G(5520), /* Channel 104 */
 341         CHAN5G(5540), /* Channel 108 */
 342         CHAN5G(5560), /* Channel 112 */
 343         CHAN5G(5580), /* Channel 116 */
 344         CHAN5G(5600), /* Channel 120 */
 345         CHAN5G(5620), /* Channel 124 */
 346         CHAN5G(5640), /* Channel 128 */
 347         CHAN5G(5660), /* Channel 132 */
 348         CHAN5G(5680), /* Channel 136 */
 349         CHAN5G(5700), /* Channel 140 */
 350
 351         CHAN5G(5745), /* Channel 149 */
 352         CHAN5G(5765), /* Channel 153 */
 353         CHAN5G(5785), /* Channel 157 */
 354         CHAN5G(5805), /* Channel 161 */
 355         CHAN5G(5825), /* Channel 165 */
 356         CHAN5G(5845), /* Channel 169 */
 357 };
 358
 359 static const struct ieee80211_rate hwsim_rates[] = {
 360         { .bitrate = 10 },
 361         { .bitrate = 20, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
 362         { .bitrate = 55, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
 363         { .bitrate = 110, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
 364         { .bitrate = 60 },
 365         { .bitrate = 90 },
 366         { .bitrate = 120 },
 367         { .bitrate = 180 },
 368         { .bitrate = 240 },
 369         { .bitrate = 360 },
 370         { .bitrate = 480 },
 371         { .bitrate = 540 }
 372 };
 373
 374 static const u32 hwsim_ciphers[] = {
 375         WLAN_CIPHER_SUITE_WEP40,
 376         WLAN_CIPHER_SUITE_WEP104,
 377         WLAN_CIPHER_SUITE_TKIP,
 378         WLAN_CIPHER_SUITE_CCMP,
 379         WLAN_CIPHER_SUITE_CCMP_256,
 380         WLAN_CIPHER_SUITE_GCMP,
 381         WLAN_CIPHER_SUITE_GCMP_256,
 382         WLAN_CIPHER_SUITE_AES_CMAC,
 383         WLAN_CIPHER_SUITE_BIP_CMAC_256,
 384         WLAN_CIPHER_SUITE_BIP_GMAC_128,
 385         WLAN_CIPHER_SUITE_BIP_GMAC_256,
 386 };
 387
 388 #define OUI_QCA 0x001374
 389 #define QCA_NL80211_SUBCMD_TEST 1
 390 enum qca_nl80211_vendor_subcmds {
 391         QCA_WLAN_VENDOR_ATTR_TEST = 8,
 392         QCA_WLAN_VENDOR_ATTR_MAX = QCA_WLAN_VENDOR_ATTR_TEST
 393 };
 394
 395 static const struct nla_policy
 396 hwsim_vendor_test_policy[QCA_WLAN_VENDOR_ATTR_MAX + 1] = {
 397         [QCA_WLAN_VENDOR_ATTR_MAX] = { .type = NLA_U32 },
 398 };
 399
 400 static int mac80211_hwsim_vendor_cmd_test(struct wiphy *wiphy,
 401                                           struct wireless_dev *wdev,
 402                                           const void *data, int data_len)
 403 {
 404         struct sk_buff *skb;
 405         struct nlattr *tb[QCA_WLAN_VENDOR_ATTR_MAX + 1];
 406         int err;
 407         u32 val;
 408
 409         err = nla_parse_deprecated(tb, QCA_WLAN_VENDOR_ATTR_MAX, data,
 410                                    data_len, hwsim_vendor_test_policy, NULL);
 411         if (err)
 412                 return err;
 413         if (!tb[QCA_WLAN_VENDOR_ATTR_TEST])
 414                 return -EINVAL;
 415         val = nla_get_u32(tb[QCA_WLAN_VENDOR_ATTR_TEST]);
 416         wiphy_dbg(wiphy, "%s: test=%u\n", __func__, val);
 417
 418         /* Send a vendor event as a test. Note that this would not normally be
 419          * done within a command handler, but rather, based on some other
 420          * trigger. For simplicity, this command is used to trigger the event
 421          * here.
 422          *
 423          * event_idx = 0 (index in mac80211_hwsim_vendor_commands)
 424          */
 425         skb = cfg80211_vendor_event_alloc(wiphy, wdev, 100, 0, GFP_KERNEL);
 426         if (skb) {
 427                 /* skb_put() or nla_put() will fill up data within
 428                  * NL80211_ATTR_VENDOR_DATA.
 429                  */
 430
 431                 /* Add vendor data */
 432                 nla_put_u32(skb, QCA_WLAN_VENDOR_ATTR_TEST, val + 1);
 433
 434                 /* Send the event - this will call nla_nest_end() */
 435                 cfg80211_vendor_event(skb, GFP_KERNEL);
 436         }
 437
 438         /* Send a response to the command */
 439         skb = cfg80211_vendor_cmd_alloc_reply_skb(wiphy, 10);
 440         if (!skb)
 441                 return -ENOMEM;
 442
 443         /* skb_put() or nla_put() will fill up data within
 444          * NL80211_ATTR_VENDOR_DATA
 445          */
 446         nla_put_u32(skb, QCA_WLAN_VENDOR_ATTR_TEST, val + 2);
 447
 448         return cfg80211_vendor_cmd_reply(skb);
 449 }
 450
 451 static struct wiphy_vendor_command mac80211_hwsim_vendor_commands[] = {
 452         {
 453                 .info = { .vendor_id = OUI_QCA,
 454                           .subcmd = QCA_NL80211_SUBCMD_TEST },
 455                 .flags = WIPHY_VENDOR_CMD_NEED_NETDEV,
 456                 .doit = mac80211_hwsim_vendor_cmd_test,
 457                 .policy = hwsim_vendor_test_policy,
 458                 .maxattr = QCA_WLAN_VENDOR_ATTR_MAX,
 459         }
 460 };
 461
 462 /* Advertise support vendor specific events */
 463 static const struct nl80211_vendor_cmd_info mac80211_hwsim_vendor_events[] = {
 464         { .vendor_id = OUI_QCA, .subcmd = 1 },
 465 };
 466
 467 static spinlock_t hwsim_radio_lock;
 468 static LIST_HEAD(hwsim_radios);
 469 static struct rhashtable hwsim_radios_rht;
 470 static int hwsim_radio_idx;
 471 static int hwsim_radios_generation = 1;
 472
 473 static struct platform_driver mac80211_hwsim_driver = {
 474         .driver = {
 475                 .name = "mac80211_hwsim",
 476         },
 477 };
 478
 479 struct mac80211_hwsim_data {
 480         struct list_head list;
 481         struct rhash_head rht;
 482         struct ieee80211_hw *hw;
 483         struct device *dev;
 484         struct ieee80211_supported_band bands[NUM_NL80211_BANDS];
 485         struct ieee80211_channel channels_2ghz[ARRAY_SIZE(hwsim_channels_2ghz)];
 486         struct ieee80211_channel channels_5ghz[ARRAY_SIZE(hwsim_channels_5ghz)];
 487         struct ieee80211_rate rates[ARRAY_SIZE(hwsim_rates)];
 488         struct ieee80211_iface_combination if_combination;
 489         struct ieee80211_iface_limit if_limits[3];
 490         int n_if_limits;
 491
 492         u32 ciphers[ARRAY_SIZE(hwsim_ciphers)];
 493
 494         struct mac_address addresses[2];
 495         int channels, idx;
 496         bool use_chanctx;
 497         bool destroy_on_close;
 498         u32 portid;
 499         char alpha2[2];
 500         const struct ieee80211_regdomain *regd;
 501
 502         struct ieee80211_channel *tmp_chan;
 503         struct ieee80211_channel *roc_chan;
 504         u32 roc_duration;
 505         struct delayed_work roc_start;
 506         struct delayed_work roc_done;
 507         struct delayed_work hw_scan;
 508         struct cfg80211_scan_request *hw_scan_request;
 509         struct ieee80211_vif *hw_scan_vif;
 510         int scan_chan_idx;
 511         u8 scan_addr[ETH_ALEN];
 512         struct {
 513                 struct ieee80211_channel *channel;
 514                 unsigned long next_start, start, end;
 515         } survey_data[ARRAY_SIZE(hwsim_channels_2ghz) +
 516                       ARRAY_SIZE(hwsim_channels_5ghz)];
 517
 518         struct ieee80211_channel *channel;
 519         u64 beacon_int  /* beacon interval in us */;
 520         unsigned int rx_filter;
 521         bool started, idle, scanning;
 522         struct mutex mutex;
 523         struct hrtimer beacon_timer;
 524         enum ps_mode {
 525                 PS_DISABLED, PS_ENABLED, PS_AUTO_POLL, PS_MANUAL_POLL
 526         } ps;
 527         bool ps_poll_pending;
 528         struct dentry *debugfs;
 529
 530         uintptr_t pending_cookie;
 531         struct sk_buff_head pending;    /* packets pending */
 532         /*
 533          * Only radios in the same group can communicate together (the
 534          * channel has to match too). Each bit represents a group. A
 535          * radio can be in more than one group.
 536          */
 537         u64 group;
 538
 539         /* group shared by radios created in the same netns */
 540         int netgroup;
 541         /* wmediumd portid responsible for netgroup of this radio */
 542         u32 wmediumd;
 543
 544         /* difference between this hw's clock and the real clock, in usecs */
 545         s64 tsf_offset;
 546         s64 bcn_delta;
 547         /* absolute beacon transmission time. Used to cover up "tx" delay. */
 548         u64 abs_bcn_ts;
 549
 550         /* Stats */
 551         u64 tx_pkts;
 552         u64 rx_pkts;
 553         u64 tx_bytes;
 554         u64 rx_bytes;
 555         u64 tx_dropped;
 556         u64 tx_failed;
 557 };
 558
 559 static const struct rhashtable_params hwsim_rht_params = {
 560         .nelem_hint = 2,
 561         .automatic_shrinking = true,
 562         .key_len = ETH_ALEN,
 563         .key_offset = offsetof(struct mac80211_hwsim_data, addresses[1]),
 564         .head_offset = offsetof(struct mac80211_hwsim_data, rht),
 565 };
 566
 567 struct hwsim_radiotap_hdr {
 568         struct ieee80211_radiotap_header hdr;
 569         __le64 rt_tsft;
 570         u8 rt_flags;
 571         u8 rt_rate;
 572         __le16 rt_channel;
 573         __le16 rt_chbitmask;
 574 } __packed;
 575
 576 struct hwsim_radiotap_ack_hdr {
 577         struct ieee80211_radiotap_header hdr;
 578         u8 rt_flags;
 579         u8 pad;
 580         __le16 rt_channel;
 581         __le16 rt_chbitmask;
 582 } __packed;
 583
 584 /* MAC80211_HWSIM netlink family */
 585 static struct genl_family hwsim_genl_family;
 586
 587 enum hwsim_multicast_groups {
 588         HWSIM_MCGRP_CONFIG,
 589 };
 590
 591 static const struct genl_multicast_group hwsim_mcgrps[] = {
 592         [HWSIM_MCGRP_CONFIG] = { .name = "config", },
 593 };
 594
 595 /* MAC80211_HWSIM netlink policy */
 596
 597 static const struct nla_policy hwsim_genl_policy[HWSIM_ATTR_MAX + 1] = {
 598         [HWSIM_ATTR_ADDR_RECEIVER] = { .type = NLA_UNSPEC, .len = ETH_ALEN },
 599         [HWSIM_ATTR_ADDR_TRANSMITTER] = { .type = NLA_UNSPEC, .len = ETH_ALEN },
 600         [HWSIM_ATTR_FRAME] = { .type = NLA_BINARY,
 601                                .len = IEEE80211_MAX_DATA_LEN },
 602         [HWSIM_ATTR_FLAGS] = { .type = NLA_U32 },
 603         [HWSIM_ATTR_RX_RATE] = { .type = NLA_U32 },
 604         [HWSIM_ATTR_SIGNAL] = { .type = NLA_U32 },
 605         [HWSIM_ATTR_TX_INFO] = { .type = NLA_UNSPEC,
 606                                  .len = IEEE80211_TX_MAX_RATES *
 607                                         sizeof(struct hwsim_tx_rate)},
 608         [HWSIM_ATTR_COOKIE] = { .type = NLA_U64 },
 609         [HWSIM_ATTR_CHANNELS] = { .type = NLA_U32 },
 610         [HWSIM_ATTR_RADIO_ID] = { .type = NLA_U32 },
 611         [HWSIM_ATTR_REG_HINT_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 612         [HWSIM_ATTR_REG_CUSTOM_REG] = { .type = NLA_U32 },
 613         [HWSIM_ATTR_REG_STRICT_REG] = { .type = NLA_FLAG },
 614         [HWSIM_ATTR_SUPPORT_P2P_DEVICE] = { .type = NLA_FLAG },
 615         [HWSIM_ATTR_DESTROY_RADIO_ON_CLOSE] = { .type = NLA_FLAG },
 616         [HWSIM_ATTR_RADIO_NAME] = { .type = NLA_STRING },
 617         [HWSIM_ATTR_NO_VIF] = { .type = NLA_FLAG },
 618         [HWSIM_ATTR_FREQ] = { .type = NLA_U32 },
 619         [HWSIM_ATTR_PERM_ADDR] = { .type = NLA_UNSPEC, .len = ETH_ALEN },
 620         [HWSIM_ATTR_IFTYPE_SUPPORT] = { .type = NLA_U32 },
 621         [HWSIM_ATTR_CIPHER_SUPPORT] = { .type = NLA_BINARY },
 622 };
 623
 624 static void mac80211_hwsim_tx_frame(struct ieee80211_hw *hw,
 625                                     struct sk_buff *skb,
 626                                     struct ieee80211_channel *chan);
 627
 628 /* sysfs attributes */
 629 static void hwsim_send_ps_poll(void *dat, u8 *mac, struct ieee80211_vif *vif)
 630 {
 631         struct mac80211_hwsim_data *data = dat;
 632         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 633         struct sk_buff *skb;
 634         struct ieee80211_pspoll *pspoll;
 635
 636         if (!vp->assoc)
 637                 return;
 638
 639         wiphy_dbg(data->hw->wiphy,
 640                   "%s: send PS-Poll to %pM for aid %d\n",
 641                   __func__, vp->bssid, vp->aid);
 642
 643         skb = dev_alloc_skb(sizeof(*pspoll));
 644         if (!skb)
 645                 return;
 646         pspoll = skb_put(skb, sizeof(*pspoll));
 647         pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
 648                                             IEEE80211_STYPE_PSPOLL |
 649                                             IEEE80211_FCTL_PM);
 650         pspoll->aid = cpu_to_le16(0xc000 | vp->aid);
 651         memcpy(pspoll->bssid, vp->bssid, ETH_ALEN);
 652         memcpy(pspoll->ta, mac, ETH_ALEN);
 653
 654         rcu_read_lock();
 655         mac80211_hwsim_tx_frame(data->hw, skb,
 656                                 rcu_dereference(vif->chanctx_conf)->def.chan);
 657         rcu_read_unlock();
 658 }
 659
 660 static void hwsim_send_nullfunc(struct mac80211_hwsim_data *data, u8 *mac,
 661                                 struct ieee80211_vif *vif, int ps)
 662 {
 663         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 664         struct sk_buff *skb;
 665         struct ieee80211_hdr *hdr;
 666
 667         if (!vp->assoc)
 668                 return;
 669
 670         wiphy_dbg(data->hw->wiphy,
 671                   "%s: send data::nullfunc to %pM ps=%d\n",
 672                   __func__, vp->bssid, ps);
 673
 674         skb = dev_alloc_skb(sizeof(*hdr));
 675         if (!skb)
 676                 return;
 677         hdr = skb_put(skb, sizeof(*hdr) - ETH_ALEN);
 678         hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
 679                                          IEEE80211_STYPE_NULLFUNC |
 680                                          IEEE80211_FCTL_TODS |
 681                                          (ps ? IEEE80211_FCTL_PM : 0));
 682         hdr->duration_id = cpu_to_le16(0);
 683         memcpy(hdr->addr1, vp->bssid, ETH_ALEN);
 684         memcpy(hdr->addr2, mac, ETH_ALEN);
 685         memcpy(hdr->addr3, vp->bssid, ETH_ALEN);
 686
 687         rcu_read_lock();
 688         mac80211_hwsim_tx_frame(data->hw, skb,
 689                                 rcu_dereference(vif->chanctx_conf)->def.chan);
 690         rcu_read_unlock();
 691 }
 692
 693
 694 static void hwsim_send_nullfunc_ps(void *dat, u8 *mac,
 695                                    struct ieee80211_vif *vif)
 696 {
 697         struct mac80211_hwsim_data *data = dat;
 698         hwsim_send_nullfunc(data, mac, vif, 1);
 699 }
 700
 701 static void hwsim_send_nullfunc_no_ps(void *dat, u8 *mac,
 702                                       struct ieee80211_vif *vif)
 703 {
 704         struct mac80211_hwsim_data *data = dat;
 705         hwsim_send_nullfunc(data, mac, vif, 0);
 706 }
 707
 708 static int hwsim_fops_ps_read(void *dat, u64 *val)
 709 {
 710         struct mac80211_hwsim_data *data = dat;
 711         *val = data->ps;
 712         return 0;
 713 }
 714
 715 static int hwsim_fops_ps_write(void *dat, u64 val)
 716 {
 717         struct mac80211_hwsim_data *data = dat;
 718         enum ps_mode old_ps;
 719
 720         if (val != PS_DISABLED && val != PS_ENABLED && val != PS_AUTO_POLL &&
 721             val != PS_MANUAL_POLL)
 722                 return -EINVAL;
 723
 724         if (val == PS_MANUAL_POLL) {
 725                 if (data->ps != PS_ENABLED)
 726                         return -EINVAL;
 727                 local_bh_disable();
 728                 ieee80211_iterate_active_interfaces_atomic(
 729                         data->hw, IEEE80211_IFACE_ITER_NORMAL,
 730                         hwsim_send_ps_poll, data);
 731                 local_bh_enable();
 732                 return 0;
 733         }
 734         old_ps = data->ps;
 735         data->ps = val;
 736
 737         local_bh_disable();
 738         if (old_ps == PS_DISABLED && val != PS_DISABLED) {
 739                 ieee80211_iterate_active_interfaces_atomic(
 740                         data->hw, IEEE80211_IFACE_ITER_NORMAL,
 741                         hwsim_send_nullfunc_ps, data);
 742         } else if (old_ps != PS_DISABLED && val == PS_DISABLED) {
 743                 ieee80211_iterate_active_interfaces_atomic(
 744                         data->hw, IEEE80211_IFACE_ITER_NORMAL,
 745                         hwsim_send_nullfunc_no_ps, data);
 746         }
 747         local_bh_enable();
 748
 749         return 0;
 750 }
 751
 752 DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_ps, hwsim_fops_ps_read, hwsim_fops_ps_write,
 753                         "%llu\n");
 754
 755 static int hwsim_write_simulate_radar(void *dat, u64 val)
 756 {
 757         struct mac80211_hwsim_data *data = dat;
 758
 759         ieee80211_radar_detected(data->hw);
 760
 761         return 0;
 762 }
 763
 764 DEFINE_SIMPLE_ATTRIBUTE(hwsim_simulate_radar, NULL,
 765                         hwsim_write_simulate_radar, "%llu\n");
 766
 767 static int hwsim_fops_group_read(void *dat, u64 *val)
 768 {
 769         struct mac80211_hwsim_data *data = dat;
 770         *val = data->group;
 771         return 0;
 772 }
 773
 774 static int hwsim_fops_group_write(void *dat, u64 val)
 775 {
 776         struct mac80211_hwsim_data *data = dat;
 777         data->group = val;
 778         return 0;
 779 }
 780
 781 DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_group,
 782                         hwsim_fops_group_read, hwsim_fops_group_write,
 783                         "%llx\n");
 784
 785 static netdev_tx_t hwsim_mon_xmit(struct sk_buff *skb,
 786                                         struct net_device *dev)
 787 {
 788         /* TODO: allow packet injection */
 789         dev_kfree_skb(skb);
 790         return NETDEV_TX_OK;
 791 }
 792
 793 static inline u64 mac80211_hwsim_get_tsf_raw(void)
 794 {
 795         return ktime_to_us(ktime_get_real());
 796 }
 797
 798 static __le64 __mac80211_hwsim_get_tsf(struct mac80211_hwsim_data *data)
 799 {
 800         u64 now = mac80211_hwsim_get_tsf_raw();
 801         return cpu_to_le64(now + data->tsf_offset);
 802 }
 803
 804 static u64 mac80211_hwsim_get_tsf(struct ieee80211_hw *hw,
 805                                   struct ieee80211_vif *vif)
 806 {
 807         struct mac80211_hwsim_data *data = hw->priv;
 808         return le64_to_cpu(__mac80211_hwsim_get_tsf(data));
 809 }
 810
 811 static void mac80211_hwsim_set_tsf(struct ieee80211_hw *hw,
 812                 struct ieee80211_vif *vif, u64 tsf)
 813 {
 814         struct mac80211_hwsim_data *data = hw->priv;
 815         u64 now = mac80211_hwsim_get_tsf(hw, vif);
 816         u32 bcn_int = data->beacon_int;
 817         u64 delta = abs(tsf - now);
 818
 819         /* adjust after beaconing with new timestamp at old TBTT */
 820         if (tsf > now) {
 821                 data->tsf_offset += delta;
 822                 data->bcn_delta = do_div(delta, bcn_int);
 823         } else {
 824                 data->tsf_offset -= delta;
 825                 data->bcn_delta = -(s64)do_div(delta, bcn_int);
 826         }
 827 }
 828
 829 static void mac80211_hwsim_monitor_rx(struct ieee80211_hw *hw,
 830                                       struct sk_buff *tx_skb,
 831                                       struct ieee80211_channel *chan)
 832 {
 833         struct mac80211_hwsim_data *data = hw->priv;
 834         struct sk_buff *skb;
 835         struct hwsim_radiotap_hdr *hdr;
 836         u16 flags;
 837         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_skb);
 838         struct ieee80211_rate *txrate = ieee80211_get_tx_rate(hw, info);
 839
 840         if (WARN_ON(!txrate))
 841                 return;
 842
 843         if (!netif_running(hwsim_mon))
 844                 return;
 845
 846         skb = skb_copy_expand(tx_skb, sizeof(*hdr), 0, GFP_ATOMIC);
 847         if (skb == NULL)
 848                 return;
 849
 850         hdr = skb_push(skb, sizeof(*hdr));
 851         hdr->hdr.it_version = PKTHDR_RADIOTAP_VERSION;
 852         hdr->hdr.it_pad = 0;
 853         hdr->hdr.it_len = cpu_to_le16(sizeof(*hdr));
 854         hdr->hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
 855                                           (1 << IEEE80211_RADIOTAP_RATE) |
 856                                           (1 << IEEE80211_RADIOTAP_TSFT) |
 857                                           (1 << IEEE80211_RADIOTAP_CHANNEL));
 858         hdr->rt_tsft = __mac80211_hwsim_get_tsf(data);
 859         hdr->rt_flags = 0;
 860         hdr->rt_rate = txrate->bitrate / 5;
 861         hdr->rt_channel = cpu_to_le16(chan->center_freq);
 862         flags = IEEE80211_CHAN_2GHZ;
 863         if (txrate->flags & IEEE80211_RATE_ERP_G)
 864                 flags |= IEEE80211_CHAN_OFDM;
 865         else
 866                 flags |= IEEE80211_CHAN_CCK;
 867         hdr->rt_chbitmask = cpu_to_le16(flags);
 868
 869         skb->dev = hwsim_mon;
 870         skb_reset_mac_header(skb);
 871         skb->ip_summed = CHECKSUM_UNNECESSARY;
 872         skb->pkt_type = PACKET_OTHERHOST;
 873         skb->protocol = htons(ETH_P_802_2);
 874         memset(skb->cb, 0, sizeof(skb->cb));
 875         netif_rx(skb);
 876 }
 877
 878
 879 static void mac80211_hwsim_monitor_ack(struct ieee80211_channel *chan,
 880                                        const u8 *addr)
 881 {
 882         struct sk_buff *skb;
 883         struct hwsim_radiotap_ack_hdr *hdr;
 884         u16 flags;
 885         struct ieee80211_hdr *hdr11;
 886
 887         if (!netif_running(hwsim_mon))
 888                 return;
 889
 890         skb = dev_alloc_skb(100);
 891         if (skb == NULL)
 892                 return;
 893
 894         hdr = skb_put(skb, sizeof(*hdr));
 895         hdr->hdr.it_version = PKTHDR_RADIOTAP_VERSION;
 896         hdr->hdr.it_pad = 0;
 897         hdr->hdr.it_len = cpu_to_le16(sizeof(*hdr));
 898         hdr->hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
 899                                           (1 << IEEE80211_RADIOTAP_CHANNEL));
 900         hdr->rt_flags = 0;
 901         hdr->pad = 0;
 902         hdr->rt_channel = cpu_to_le16(chan->center_freq);
 903         flags = IEEE80211_CHAN_2GHZ;
 904         hdr->rt_chbitmask = cpu_to_le16(flags);
 905
 906         hdr11 = skb_put(skb, 10);
 907         hdr11->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
 908                                            IEEE80211_STYPE_ACK);
 909         hdr11->duration_id = cpu_to_le16(0);
 910         memcpy(hdr11->addr1, addr, ETH_ALEN);
 911
 912         skb->dev = hwsim_mon;
 913         skb_reset_mac_header(skb);
 914         skb->ip_summed = CHECKSUM_UNNECESSARY;
 915         skb->pkt_type = PACKET_OTHERHOST;
 916         skb->protocol = htons(ETH_P_802_2);
 917         memset(skb->cb, 0, sizeof(skb->cb));
 918         netif_rx(skb);
 919 }
 920
 921 struct mac80211_hwsim_addr_match_data {
 922         u8 addr[ETH_ALEN];
 923         bool ret;
 924 };
 925
 926 static void mac80211_hwsim_addr_iter(void *data, u8 *mac,
 927                                      struct ieee80211_vif *vif)
 928 {
 929         struct mac80211_hwsim_addr_match_data *md = data;
 930
 931         if (memcmp(mac, md->addr, ETH_ALEN) == 0)
 932                 md->ret = true;
 933 }
 934
 935 static bool mac80211_hwsim_addr_match(struct mac80211_hwsim_data *data,
 936                                       const u8 *addr)
 937 {
 938         struct mac80211_hwsim_addr_match_data md = {
 939                 .ret = false,
 940         };
 941
 942         if (data->scanning && memcmp(addr, data->scan_addr, ETH_ALEN) == 0)
 943                 return true;
 944
 945         memcpy(md.addr, addr, ETH_ALEN);
 946
 947         ieee80211_iterate_active_interfaces_atomic(data->hw,
 948                                                    IEEE80211_IFACE_ITER_NORMAL,
 949                                                    mac80211_hwsim_addr_iter,
 950                                                    &md);
 951
 952         return md.ret;
 953 }
 954
 955 static bool hwsim_ps_rx_ok(struct mac80211_hwsim_data *data,
 956                            struct sk_buff *skb)
 957 {
 958         switch (data->ps) {
 959         case PS_DISABLED:
 960                 return true;
 961         case PS_ENABLED:
 962                 return false;
 963         case PS_AUTO_POLL:
 964                 /* TODO: accept (some) Beacons by default and other frames only
 965                  * if pending PS-Poll has been sent */
 966                 return true;
 967         case PS_MANUAL_POLL:
 968                 /* Allow unicast frames to own address if there is a pending
 969                  * PS-Poll */
 970                 if (data->ps_poll_pending &&
 971                     mac80211_hwsim_addr_match(data, skb->data + 4)) {
 972                         data->ps_poll_pending = false;
 973                         return true;
 974                 }
 975                 return false;
 976         }
 977
 978         return true;
 979 }
 980
 981 static int hwsim_unicast_netgroup(struct mac80211_hwsim_data *data,
 982                                   struct sk_buff *skb, int portid)
 983 {
 984         struct net *net;
 985         bool found = false;
 986         int res = -ENOENT;
 987
 988         rcu_read_lock();
 989         for_each_net_rcu(net) {
 990                 if (data->netgroup == hwsim_net_get_netgroup(net)) {
 991                         res = genlmsg_unicast(net, skb, portid);
 992                         found = true;
 993                         break;
 994                 }
 995         }
 996         rcu_read_unlock();
 997
 998         if (!found)
 999                 nlmsg_free(skb);
1000
1001         return res;
1002 }
1003
1004 static inline u16 trans_tx_rate_flags_ieee2hwsim(struct ieee80211_tx_rate *rate)
1005 {
1006         u16 result = 0;
1007
1008         if (rate->flags & IEEE80211_TX_RC_USE_RTS_CTS)
1009                 result |= MAC80211_HWSIM_TX_RC_USE_RTS_CTS;
1010         if (rate->flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
1011                 result |= MAC80211_HWSIM_TX_RC_USE_CTS_PROTECT;
1012         if (rate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
1013                 result |= MAC80211_HWSIM_TX_RC_USE_SHORT_PREAMBLE;
1014         if (rate->flags & IEEE80211_TX_RC_MCS)
1015                 result |= MAC80211_HWSIM_TX_RC_MCS;
1016         if (rate->flags & IEEE80211_TX_RC_GREEN_FIELD)
1017                 result |= MAC80211_HWSIM_TX_RC_GREEN_FIELD;
1018         if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
1019                 result |= MAC80211_HWSIM_TX_RC_40_MHZ_WIDTH;
1020         if (rate->flags & IEEE80211_TX_RC_DUP_DATA)
1021                 result |= MAC80211_HWSIM_TX_RC_DUP_DATA;
1022         if (rate->flags & IEEE80211_TX_RC_SHORT_GI)
1023                 result |= MAC80211_HWSIM_TX_RC_SHORT_GI;
1024         if (rate->flags & IEEE80211_TX_RC_VHT_MCS)
1025                 result |= MAC80211_HWSIM_TX_RC_VHT_MCS;
1026         if (rate->flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
1027                 result |= MAC80211_HWSIM_TX_RC_80_MHZ_WIDTH;
1028         if (rate->flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
1029                 result |= MAC80211_HWSIM_TX_RC_160_MHZ_WIDTH;
1030
1031         return result;
1032 }
1033
1034 static void mac80211_hwsim_tx_frame_nl(struct ieee80211_hw *hw,
1035                                        struct sk_buff *my_skb,
1036                                        int dst_portid)
1037 {
1038         struct sk_buff *skb;
1039         struct mac80211_hwsim_data *data = hw->priv;
1040         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) my_skb->data;
1041         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(my_skb);
1042         void *msg_head;
1043         unsigned int hwsim_flags = 0;
1044         int i;
1045         struct hwsim_tx_rate tx_attempts[IEEE80211_TX_MAX_RATES];
1046         struct hwsim_tx_rate_flag tx_attempts_flags[IEEE80211_TX_MAX_RATES];
1047         uintptr_t cookie;
1048
1049         if (data->ps != PS_DISABLED)
1050                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1051         /* If the queue contains MAX_QUEUE skb's drop some */
1052         if (skb_queue_len(&data->pending) >= MAX_QUEUE) {
1053                 /* Droping until WARN_QUEUE level */
1054                 while (skb_queue_len(&data->pending) >= WARN_QUEUE) {
1055                         ieee80211_free_txskb(hw, skb_dequeue(&data->pending));
1056                         data->tx_dropped++;
1057                 }
1058         }
1059
1060         skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1061         if (skb == NULL)
1062                 goto nla_put_failure;
1063
1064         msg_head = genlmsg_put(skb, 0, 0, &hwsim_genl_family, 0,
1065                                HWSIM_CMD_FRAME);
1066         if (msg_head == NULL) {
1067                 pr_debug("mac80211_hwsim: problem with msg_head\n");
1068                 goto nla_put_failure;
1069         }
1070
1071         if (nla_put(skb, HWSIM_ATTR_ADDR_TRANSMITTER,
1072                     ETH_ALEN, data->addresses[1].addr))
1073                 goto nla_put_failure;
1074
1075         /* We get the skb->data */
1076         if (nla_put(skb, HWSIM_ATTR_FRAME, my_skb->len, my_skb->data))
1077                 goto nla_put_failure;
1078
1079         /* We get the flags for this transmission, and we translate them to
1080            wmediumd flags  */
1081
1082         if (info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS)
1083                 hwsim_flags |= HWSIM_TX_CTL_REQ_TX_STATUS;
1084
1085         if (info->flags & IEEE80211_TX_CTL_NO_ACK)
1086                 hwsim_flags |= HWSIM_TX_CTL_NO_ACK;
1087
1088         if (nla_put_u32(skb, HWSIM_ATTR_FLAGS, hwsim_flags))
1089                 goto nla_put_failure;
1090
1091         if (nla_put_u32(skb, HWSIM_ATTR_FREQ, data->channel->center_freq))
1092                 goto nla_put_failure;
1093
1094         /* We get the tx control (rate and retries) info*/
1095
1096         for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
1097                 tx_attempts[i].idx = info->status.rates[i].idx;
1098                 tx_attempts_flags[i].idx = info->status.rates[i].idx;
1099                 tx_attempts[i].count = info->status.rates[i].count;
1100                 tx_attempts_flags[i].flags =
1101                                 trans_tx_rate_flags_ieee2hwsim(
1102                                                 &info->status.rates[i]);
1103         }
1104
1105         if (nla_put(skb, HWSIM_ATTR_TX_INFO,
1106                     sizeof(struct hwsim_tx_rate)*IEEE80211_TX_MAX_RATES,
1107                     tx_attempts))
1108                 goto nla_put_failure;
1109
1110         if (nla_put(skb, HWSIM_ATTR_TX_INFO_FLAGS,
1111                     sizeof(struct hwsim_tx_rate_flag) * IEEE80211_TX_MAX_RATES,
1112                     tx_attempts_flags))
1113                 goto nla_put_failure;
1114
1115         /* We create a cookie to identify this skb */
1116         data->pending_cookie++;
1117         cookie = data->pending_cookie;
1118         info->rate_driver_data[0] = (void *)cookie;
1119         if (nla_put_u64_64bit(skb, HWSIM_ATTR_COOKIE, cookie, HWSIM_ATTR_PAD))
1120                 goto nla_put_failure;
1121
1122         genlmsg_end(skb, msg_head);
1123         if (hwsim_unicast_netgroup(data, skb, dst_portid))
1124                 goto err_free_txskb;
1125
1126         /* Enqueue the packet */
1127         skb_queue_tail(&data->pending, my_skb);
1128         data->tx_pkts++;
1129         data->tx_bytes += my_skb->len;
1130         return;
1131
1132 nla_put_failure:
1133         nlmsg_free(skb);
1134 err_free_txskb:
1135         pr_debug("mac80211_hwsim: error occurred in %s\n", __func__);
1136         ieee80211_free_txskb(hw, my_skb);
1137         data->tx_failed++;
1138 }
1139
1140 static bool hwsim_chans_compat(struct ieee80211_channel *c1,
1141                                struct ieee80211_channel *c2)
1142 {
1143         if (!c1 || !c2)
1144                 return false;
1145
1146         return c1->center_freq == c2->center_freq;
1147 }
1148
1149 struct tx_iter_data {
1150         struct ieee80211_channel *channel;
1151         bool receive;
1152 };
1153
1154 static void mac80211_hwsim_tx_iter(void *_data, u8 *addr,
1155                                    struct ieee80211_vif *vif)
1156 {
1157         struct tx_iter_data *data = _data;
1158
1159         if (!vif->chanctx_conf)
1160                 return;
1161
1162         if (!hwsim_chans_compat(data->channel,
1163                                 rcu_dereference(vif->chanctx_conf)->def.chan))
1164                 return;
1165
1166         data->receive = true;
1167 }
1168
1169 static void mac80211_hwsim_add_vendor_rtap(struct sk_buff *skb)
1170 {
1171         /*
1172          * To enable this code, #define the HWSIM_RADIOTAP_OUI,
1173          * e.g. like this:
1174          * #define HWSIM_RADIOTAP_OUI "\x02\x00\x00"
1175          * (but you should use a valid OUI, not that)
1176          *
1177          * If anyone wants to 'donate' a radiotap OUI/subns code
1178          * please send a patch removing this #ifdef and changing
1179          * the values accordingly.
1180          */
1181 #ifdef HWSIM_RADIOTAP_OUI
1182         struct ieee80211_vendor_radiotap *rtap;
1183
1184         /*
1185          * Note that this code requires the headroom in the SKB
1186          * that was allocated earlier.
1187          */
1188         rtap = skb_push(skb, sizeof(*rtap) + 8 + 4);
1189         rtap->oui[0] = HWSIM_RADIOTAP_OUI[0];
1190         rtap->oui[1] = HWSIM_RADIOTAP_OUI[1];
1191         rtap->oui[2] = HWSIM_RADIOTAP_OUI[2];
1192         rtap->subns = 127;
1193
1194         /*
1195          * Radiotap vendor namespaces can (and should) also be
1196          * split into fields by using the standard radiotap
1197          * presence bitmap mechanism. Use just BIT(0) here for
1198          * the presence bitmap.
1199          */
1200         rtap->present = BIT(0);
1201         /* We have 8 bytes of (dummy) data */
1202         rtap->len = 8;
1203         /* For testing, also require it to be aligned */
1204         rtap->align = 8;
1205         /* And also test that padding works, 4 bytes */
1206         rtap->pad = 4;
1207         /* push the data */
1208         memcpy(rtap->data, "ABCDEFGH", 8);
1209         /* make sure to clear padding, mac80211 doesn't */
1210         memset(rtap->data + 8, 0, 4);
1211
1212         IEEE80211_SKB_RXCB(skb)->flag |= RX_FLAG_RADIOTAP_VENDOR_DATA;
1213 #endif
1214 }
1215
1216 static bool mac80211_hwsim_tx_frame_no_nl(struct ieee80211_hw *hw,
1217                                           struct sk_buff *skb,
1218                                           struct ieee80211_channel *chan)
1219 {
1220         struct mac80211_hwsim_data *data = hw->priv, *data2;
1221         bool ack = false;
1222         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1223         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1224         struct ieee80211_rx_status rx_status;
1225         u64 now;
1226
1227         memset(&rx_status, 0, sizeof(rx_status));
1228         rx_status.flag |= RX_FLAG_MACTIME_START;
1229         rx_status.freq = chan->center_freq;
1230         rx_status.band = chan->band;
1231         if (info->control.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) {
1232                 rx_status.rate_idx =
1233                         ieee80211_rate_get_vht_mcs(&info->control.rates[0]);
1234                 rx_status.nss =
1235                         ieee80211_rate_get_vht_nss(&info->control.rates[0]);
1236                 rx_status.encoding = RX_ENC_VHT;
1237         } else {
1238                 rx_status.rate_idx = info->control.rates[0].idx;
1239                 if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS)
1240                         rx_status.encoding = RX_ENC_HT;
1241         }
1242         if (info->control.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
1243                 rx_status.bw = RATE_INFO_BW_40;
1244         else if (info->control.rates[0].flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
1245                 rx_status.bw = RATE_INFO_BW_80;
1246         else if (info->control.rates[0].flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
1247                 rx_status.bw = RATE_INFO_BW_160;
1248         else
1249                 rx_status.bw = RATE_INFO_BW_20;
1250         if (info->control.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
1251                 rx_status.enc_flags |= RX_ENC_FLAG_SHORT_GI;
1252         /* TODO: simulate real signal strength (and optional packet loss) */
1253         rx_status.signal = -50;
1254         if (info->control.vif)
1255                 rx_status.signal += info->control.vif->bss_conf.txpower;
1256
1257         if (data->ps != PS_DISABLED)
1258                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1259
1260         /* release the skb's source info */
1261         skb_orphan(skb);
1262         skb_dst_drop(skb);
1263         skb->mark = 0;
1264         secpath_reset(skb);
1265         nf_reset(skb);
1266
1267         /*
1268          * Get absolute mactime here so all HWs RX at the "same time", and
1269          * absolute TX time for beacon mactime so the timestamp matches.
1270          * Giving beacons a different mactime than non-beacons looks messy, but
1271          * it helps the Toffset be exact and a ~10us mactime discrepancy
1272          * probably doesn't really matter.
1273          */
1274         if (ieee80211_is_beacon(hdr->frame_control) ||
1275             ieee80211_is_probe_resp(hdr->frame_control)) {
1276                 rx_status.boottime_ns = ktime_get_boottime_ns();
1277                 now = data->abs_bcn_ts;
1278         } else {
1279                 now = mac80211_hwsim_get_tsf_raw();
1280         }
1281
1282         /* Copy skb to all enabled radios that are on the current frequency */
1283         spin_lock(&hwsim_radio_lock);
1284         list_for_each_entry(data2, &hwsim_radios, list) {
1285                 struct sk_buff *nskb;
1286                 struct tx_iter_data tx_iter_data = {
1287                         .receive = false,
1288                         .channel = chan,
1289                 };
1290
1291                 if (data == data2)
1292                         continue;
1293
1294                 if (!data2->started || (data2->idle && !data2->tmp_chan) ||
1295                     !hwsim_ps_rx_ok(data2, skb))
1296                         continue;
1297
1298                 if (!(data->group & data2->group))
1299                         continue;
1300
1301                 if (data->netgroup != data2->netgroup)
1302                         continue;
1303
1304                 if (!hwsim_chans_compat(chan, data2->tmp_chan) &&
1305                     !hwsim_chans_compat(chan, data2->channel)) {
1306                         ieee80211_iterate_active_interfaces_atomic(
1307                                 data2->hw, IEEE80211_IFACE_ITER_NORMAL,
1308                                 mac80211_hwsim_tx_iter, &tx_iter_data);
1309                         if (!tx_iter_data.receive)
1310                                 continue;
1311                 }
1312
1313                 /*
1314                  * reserve some space for our vendor and the normal
1315                  * radiotap header, since we're copying anyway
1316                  */
1317                 if (skb->len < PAGE_SIZE && paged_rx) {
1318                         struct page *page = alloc_page(GFP_ATOMIC);
1319
1320                         if (!page)
1321                                 continue;
1322
1323                         nskb = dev_alloc_skb(128);
1324                         if (!nskb) {
1325                                 __free_page(page);
1326                                 continue;
1327                         }
1328
1329                         memcpy(page_address(page), skb->data, skb->len);
1330                         skb_add_rx_frag(nskb, 0, page, 0, skb->len, skb->len);
1331                 } else {
1332                         nskb = skb_copy(skb, GFP_ATOMIC);
1333                         if (!nskb)
1334                                 continue;
1335                 }
1336
1337                 if (mac80211_hwsim_addr_match(data2, hdr->addr1))
1338                         ack = true;
1339
1340                 rx_status.mactime = now + data2->tsf_offset;
1341
1342                 memcpy(IEEE80211_SKB_RXCB(nskb), &rx_status, sizeof(rx_status));
1343
1344                 mac80211_hwsim_add_vendor_rtap(nskb);
1345
1346                 data2->rx_pkts++;
1347                 data2->rx_bytes += nskb->len;
1348                 ieee80211_rx_irqsafe(data2->hw, nskb);
1349         }
1350         spin_unlock(&hwsim_radio_lock);
1351
1352         return ack;
1353 }
1354
1355 static void mac80211_hwsim_tx(struct ieee80211_hw *hw,
1356                               struct ieee80211_tx_control *control,
1357                               struct sk_buff *skb)
1358 {
1359         struct mac80211_hwsim_data *data = hw->priv;
1360         struct ieee80211_tx_info *txi = IEEE80211_SKB_CB(skb);
1361         struct ieee80211_hdr *hdr = (void *)skb->data;
1362         struct ieee80211_chanctx_conf *chanctx_conf;
1363         struct ieee80211_channel *channel;
1364         bool ack;
1365         u32 _portid;
1366
1367         if (WARN_ON(skb->len < 10)) {
1368                 /* Should not happen; just a sanity check for addr1 use */
1369                 ieee80211_free_txskb(hw, skb);
1370                 return;
1371         }
1372
1373         if (!data->use_chanctx) {
1374                 channel = data->channel;
1375         } else if (txi->hw_queue == 4) {
1376                 channel = data->tmp_chan;
1377         } else {
1378                 chanctx_conf = rcu_dereference(txi->control.vif->chanctx_conf);
1379                 if (chanctx_conf)
1380                         channel = chanctx_conf->def.chan;
1381                 else
1382                         channel = NULL;
1383         }
1384
1385         if (WARN(!channel, "TX w/o channel - queue = %d\n", txi->hw_queue)) {
1386                 ieee80211_free_txskb(hw, skb);
1387                 return;
1388         }
1389
1390         if (data->idle && !data->tmp_chan) {
1391                 wiphy_dbg(hw->wiphy, "Trying to TX when idle - reject\n");
1392                 ieee80211_free_txskb(hw, skb);
1393                 return;
1394         }
1395
1396         if (txi->control.vif)
1397                 hwsim_check_magic(txi->control.vif);
1398         if (control->sta)
1399                 hwsim_check_sta_magic(control->sta);
1400
1401         if (ieee80211_hw_check(hw, SUPPORTS_RC_TABLE))
1402                 ieee80211_get_tx_rates(txi->control.vif, control->sta, skb,
1403                                        txi->control.rates,
1404                                        ARRAY_SIZE(txi->control.rates));
1405
1406         if (skb->len >= 24 + 8 &&
1407             ieee80211_is_probe_resp(hdr->frame_control)) {
1408                 /* fake header transmission time */
1409                 struct ieee80211_mgmt *mgmt;
1410                 struct ieee80211_rate *txrate;
1411                 u64 ts;
1412
1413                 mgmt = (struct ieee80211_mgmt *)skb->data;
1414                 txrate = ieee80211_get_tx_rate(hw, txi);
1415                 ts = mac80211_hwsim_get_tsf_raw();
1416                 mgmt->u.probe_resp.timestamp =
1417                         cpu_to_le64(ts + data->tsf_offset +
1418                                     24 * 8 * 10 / txrate->bitrate);
1419         }
1420
1421         mac80211_hwsim_monitor_rx(hw, skb, channel);
1422
1423         /* wmediumd mode check */
1424         _portid = READ_ONCE(data->wmediumd);
1425
1426         if (_portid)
1427                 return mac80211_hwsim_tx_frame_nl(hw, skb, _portid);
1428
1429         /* NO wmediumd detected, perfect medium simulation */
1430         data->tx_pkts++;
1431         data->tx_bytes += skb->len;
1432         ack = mac80211_hwsim_tx_frame_no_nl(hw, skb, channel);
1433
1434         if (ack && skb->len >= 16)
1435                 mac80211_hwsim_monitor_ack(channel, hdr->addr2);
1436
1437         ieee80211_tx_info_clear_status(txi);
1438
1439         /* frame was transmitted at most favorable rate at first attempt */
1440         txi->control.rates[0].count = 1;
1441         txi->control.rates[1].idx = -1;
1442
1443         if (!(txi->flags & IEEE80211_TX_CTL_NO_ACK) && ack)
1444                 txi->flags |= IEEE80211_TX_STAT_ACK;
1445         ieee80211_tx_status_irqsafe(hw, skb);
1446 }
1447
1448
1449 static int mac80211_hwsim_start(struct ieee80211_hw *hw)
1450 {
1451         struct mac80211_hwsim_data *data = hw->priv;
1452         wiphy_dbg(hw->wiphy, "%s\n", __func__);
1453         data->started = true;
1454         return 0;
1455 }
1456
1457
1458 static void mac80211_hwsim_stop(struct ieee80211_hw *hw)
1459 {
1460         struct mac80211_hwsim_data *data = hw->priv;
1461         data->started = false;
1462         hrtimer_cancel(&data->beacon_timer);
1463         wiphy_dbg(hw->wiphy, "%s\n", __func__);
1464 }
1465
1466
1467 static int mac80211_hwsim_add_interface(struct ieee80211_hw *hw,
1468                                         struct ieee80211_vif *vif)
1469 {
1470         wiphy_dbg(hw->wiphy, "%s (type=%d mac_addr=%pM)\n",
1471                   __func__, ieee80211_vif_type_p2p(vif),
1472                   vif->addr);
1473         hwsim_set_magic(vif);
1474
1475         vif->cab_queue = 0;
1476         vif->hw_queue[IEEE80211_AC_VO] = 0;
1477         vif->hw_queue[IEEE80211_AC_VI] = 1;
1478         vif->hw_queue[IEEE80211_AC_BE] = 2;
1479         vif->hw_queue[IEEE80211_AC_BK] = 3;
1480
1481         return 0;
1482 }
1483
1484
1485 static int mac80211_hwsim_change_interface(struct ieee80211_hw *hw,
1486                                            struct ieee80211_vif *vif,
1487                                            enum nl80211_iftype newtype,
1488                                            bool newp2p)
1489 {
1490         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1491         wiphy_dbg(hw->wiphy,
1492                   "%s (old type=%d, new type=%d, mac_addr=%pM)\n",
1493                   __func__, ieee80211_vif_type_p2p(vif),
1494                     newtype, vif->addr);
1495         hwsim_check_magic(vif);
1496
1497         /*
1498          * interface may change from non-AP to AP in
1499          * which case this needs to be set up again
1500          */
1501         vif->cab_queue = 0;
1502
1503         return 0;
1504 }
1505
1506 static void mac80211_hwsim_remove_interface(
1507         struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1508 {
1509         wiphy_dbg(hw->wiphy, "%s (type=%d mac_addr=%pM)\n",
1510                   __func__, ieee80211_vif_type_p2p(vif),
1511                   vif->addr);
1512         hwsim_check_magic(vif);
1513         hwsim_clear_magic(vif);
1514 }
1515
1516 static void mac80211_hwsim_tx_frame(struct ieee80211_hw *hw,
1517                                     struct sk_buff *skb,
1518                                     struct ieee80211_channel *chan)
1519 {
1520         struct mac80211_hwsim_data *data = hw->priv;
1521         u32 _pid = READ_ONCE(data->wmediumd);
1522
1523         if (ieee80211_hw_check(hw, SUPPORTS_RC_TABLE)) {
1524                 struct ieee80211_tx_info *txi = IEEE80211_SKB_CB(skb);
1525                 ieee80211_get_tx_rates(txi->control.vif, NULL, skb,
1526                                        txi->control.rates,
1527                                        ARRAY_SIZE(txi->control.rates));
1528         }
1529
1530         mac80211_hwsim_monitor_rx(hw, skb, chan);
1531
1532         if (_pid)
1533                 return mac80211_hwsim_tx_frame_nl(hw, skb, _pid);
1534
1535         mac80211_hwsim_tx_frame_no_nl(hw, skb, chan);
1536         dev_kfree_skb(skb);
1537 }
1538
1539 static void mac80211_hwsim_beacon_tx(void *arg, u8 *mac,
1540                                      struct ieee80211_vif *vif)
1541 {
1542         struct mac80211_hwsim_data *data = arg;
1543         struct ieee80211_hw *hw = data->hw;
1544         struct ieee80211_tx_info *info;
1545         struct ieee80211_rate *txrate;
1546         struct ieee80211_mgmt *mgmt;
1547         struct sk_buff *skb;
1548
1549         hwsim_check_magic(vif);
1550
1551         if (vif->type != NL80211_IFTYPE_AP &&
1552             vif->type != NL80211_IFTYPE_MESH_POINT &&
1553             vif->type != NL80211_IFTYPE_ADHOC)
1554                 return;
1555
1556         skb = ieee80211_beacon_get(hw, vif);
1557         if (skb == NULL)
1558                 return;
1559         info = IEEE80211_SKB_CB(skb);
1560         if (ieee80211_hw_check(hw, SUPPORTS_RC_TABLE))
1561                 ieee80211_get_tx_rates(vif, NULL, skb,
1562                                        info->control.rates,
1563                                        ARRAY_SIZE(info->control.rates));
1564
1565         txrate = ieee80211_get_tx_rate(hw, info);
1566
1567         mgmt = (struct ieee80211_mgmt *) skb->data;
1568         /* fake header transmission time */
1569         data->abs_bcn_ts = mac80211_hwsim_get_tsf_raw();
1570         mgmt->u.beacon.timestamp = cpu_to_le64(data->abs_bcn_ts +
1571                                                data->tsf_offset +
1572                                                24 * 8 * 10 / txrate->bitrate);
1573
1574         mac80211_hwsim_tx_frame(hw, skb,
1575                                 rcu_dereference(vif->chanctx_conf)->def.chan);
1576
1577         if (vif->csa_active && ieee80211_csa_is_complete(vif))
1578                 ieee80211_csa_finish(vif);
1579 }
1580
1581 static enum hrtimer_restart
1582 mac80211_hwsim_beacon(struct hrtimer *timer)
1583 {
1584         struct mac80211_hwsim_data *data =
1585                 container_of(timer, struct mac80211_hwsim_data, beacon_timer);
1586         struct ieee80211_hw *hw = data->hw;
1587         u64 bcn_int = data->beacon_int;
1588
1589         if (!data->started)
1590                 return HRTIMER_NORESTART;
1591
1592         ieee80211_iterate_active_interfaces_atomic(
1593                 hw, IEEE80211_IFACE_ITER_NORMAL,
1594                 mac80211_hwsim_beacon_tx, data);
1595
1596         /* beacon at new TBTT + beacon interval */
1597         if (data->bcn_delta) {
1598                 bcn_int -= data->bcn_delta;
1599                 data->bcn_delta = 0;
1600         }
1601         hrtimer_forward(&data->beacon_timer, hrtimer_get_expires(timer),
1602                         ns_to_ktime(bcn_int * NSEC_PER_USEC));
1603         return HRTIMER_RESTART;
1604 }
1605
1606 static const char * const hwsim_chanwidths[] = {
1607         [NL80211_CHAN_WIDTH_20_NOHT] = "noht",
1608         [NL80211_CHAN_WIDTH_20] = "ht20",
1609         [NL80211_CHAN_WIDTH_40] = "ht40",
1610         [NL80211_CHAN_WIDTH_80] = "vht80",
1611         [NL80211_CHAN_WIDTH_80P80] = "vht80p80",
1612         [NL80211_CHAN_WIDTH_160] = "vht160",
1613 };
1614
1615 static int mac80211_hwsim_config(struct ieee80211_hw *hw, u32 changed)
1616 {
1617         struct mac80211_hwsim_data *data = hw->priv;
1618         struct ieee80211_conf *conf = &hw->conf;
1619         static const char *smps_modes[IEEE80211_SMPS_NUM_MODES] = {
1620                 [IEEE80211_SMPS_AUTOMATIC] = "auto",
1621                 [IEEE80211_SMPS_OFF] = "off",
1622                 [IEEE80211_SMPS_STATIC] = "static",
1623                 [IEEE80211_SMPS_DYNAMIC] = "dynamic",
1624         };
1625         int idx;
1626
1627         if (conf->chandef.chan)
1628                 wiphy_dbg(hw->wiphy,
1629                           "%s (freq=%d(%d - %d)/%s idle=%d ps=%d smps=%s)\n",
1630                           __func__,
1631                           conf->chandef.chan->center_freq,
1632                           conf->chandef.center_freq1,
1633                           conf->chandef.center_freq2,
1634                           hwsim_chanwidths[conf->chandef.width],
1635                           !!(conf->flags & IEEE80211_CONF_IDLE),
1636                           !!(conf->flags & IEEE80211_CONF_PS),
1637                           smps_modes[conf->smps_mode]);
1638         else
1639                 wiphy_dbg(hw->wiphy,
1640                           "%s (freq=0 idle=%d ps=%d smps=%s)\n",
1641                           __func__,
1642                           !!(conf->flags & IEEE80211_CONF_IDLE),
1643                           !!(conf->flags & IEEE80211_CONF_PS),
1644                           smps_modes[conf->smps_mode]);
1645
1646         data->idle = !!(conf->flags & IEEE80211_CONF_IDLE);
1647
1648         WARN_ON(conf->chandef.chan && data->use_chanctx);
1649
1650         mutex_lock(&data->mutex);
1651         if (data->scanning && conf->chandef.chan) {
1652                 for (idx = 0; idx < ARRAY_SIZE(data->survey_data); idx++) {
1653                         if (data->survey_data[idx].channel == data->channel) {
1654                                 data->survey_data[idx].start =
1655                                         data->survey_data[idx].next_start;
1656                                 data->survey_data[idx].end = jiffies;
1657                                 break;
1658                         }
1659                 }
1660
1661                 data->channel = conf->chandef.chan;
1662
1663                 for (idx = 0; idx < ARRAY_SIZE(data->survey_data); idx++) {
1664                         if (data->survey_data[idx].channel &&
1665                             data->survey_data[idx].channel != data->channel)
1666                                 continue;
1667                         data->survey_data[idx].channel = data->channel;
1668                         data->survey_data[idx].next_start = jiffies;
1669                         break;
1670                 }
1671         } else {
1672                 data->channel = conf->chandef.chan;
1673         }
1674         mutex_unlock(&data->mutex);
1675
1676         if (!data->started || !data->beacon_int)
1677                 hrtimer_cancel(&data->beacon_timer);
1678         else if (!hrtimer_is_queued(&data->beacon_timer)) {
1679                 u64 tsf = mac80211_hwsim_get_tsf(hw, NULL);
1680                 u32 bcn_int = data->beacon_int;
1681                 u64 until_tbtt = bcn_int - do_div(tsf, bcn_int);
1682
1683                 hrtimer_start(&data->beacon_timer,
1684                               ns_to_ktime(until_tbtt * NSEC_PER_USEC),
1685                               HRTIMER_MODE_REL_SOFT);
1686         }
1687
1688         return 0;
1689 }
1690
1691
1692 static void mac80211_hwsim_configure_filter(struct ieee80211_hw *hw,
1693                                             unsigned int changed_flags,
1694                                             unsigned int *total_flags,u64 multicast)
1695 {
1696         struct mac80211_hwsim_data *data = hw->priv;
1697
1698         wiphy_dbg(hw->wiphy, "%s\n", __func__);
1699
1700         data->rx_filter = 0;
1701         if (*total_flags & FIF_ALLMULTI)
1702                 data->rx_filter |= FIF_ALLMULTI;
1703
1704         *total_flags = data->rx_filter;
1705 }
1706
1707 static void mac80211_hwsim_bcn_en_iter(void *data, u8 *mac,
1708                                        struct ieee80211_vif *vif)
1709 {
1710         unsigned int *count = data;
1711         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
1712
1713         if (vp->bcn_en)
1714                 (*count)++;
1715 }
1716
1717 static void mac80211_hwsim_bss_info_changed(struct ieee80211_hw *hw,
1718                                             struct ieee80211_vif *vif,
1719                                             struct ieee80211_bss_conf *info,
1720                                             u32 changed)
1721 {
1722         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
1723         struct mac80211_hwsim_data *data = hw->priv;
1724
1725         hwsim_check_magic(vif);
1726
1727         wiphy_dbg(hw->wiphy, "%s(changed=0x%x vif->addr=%pM)\n",
1728                   __func__, changed, vif->addr);
1729
1730         if (changed & BSS_CHANGED_BSSID) {
1731                 wiphy_dbg(hw->wiphy, "%s: BSSID changed: %pM\n",
1732                           __func__, info->bssid);
1733                 memcpy(vp->bssid, info->bssid, ETH_ALEN);
1734         }
1735
1736         if (changed & BSS_CHANGED_ASSOC) {
1737                 wiphy_dbg(hw->wiphy, "  ASSOC: assoc=%d aid=%d\n",
1738                           info->assoc, info->aid);
1739                 vp->assoc = info->assoc;
1740                 vp->aid = info->aid;
1741         }
1742
1743         if (changed & BSS_CHANGED_BEACON_ENABLED) {
1744                 wiphy_dbg(hw->wiphy, "  BCN EN: %d (BI=%u)\n",
1745                           info->enable_beacon, info->beacon_int);
1746                 vp->bcn_en = info->enable_beacon;
1747                 if (data->started &&
1748                     !hrtimer_is_queued(&data->beacon_timer) &&
1749                     info->enable_beacon) {
1750                         u64 tsf, until_tbtt;
1751                         u32 bcn_int;
1752                         data->beacon_int = info->beacon_int * 1024;
1753                         tsf = mac80211_hwsim_get_tsf(hw, vif);
1754                         bcn_int = data->beacon_int;
1755                         until_tbtt = bcn_int - do_div(tsf, bcn_int);
1756
1757                         hrtimer_start(&data->beacon_timer,
1758                                       ns_to_ktime(until_tbtt * NSEC_PER_USEC),
1759                                       HRTIMER_MODE_REL_SOFT);
1760                 } else if (!info->enable_beacon) {
1761                         unsigned int count = 0;
1762                         ieee80211_iterate_active_interfaces_atomic(
1763                                 data->hw, IEEE80211_IFACE_ITER_NORMAL,
1764                                 mac80211_hwsim_bcn_en_iter, &count);
1765                         wiphy_dbg(hw->wiphy, "  beaconing vifs remaining: %u",
1766                                   count);
1767                         if (count == 0) {
1768                                 hrtimer_cancel(&data->beacon_timer);
1769                                 data->beacon_int = 0;
1770                         }
1771                 }
1772         }
1773
1774         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1775                 wiphy_dbg(hw->wiphy, "  ERP_CTS_PROT: %d\n",
1776                           info->use_cts_prot);
1777         }
1778
1779         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1780                 wiphy_dbg(hw->wiphy, "  ERP_PREAMBLE: %d\n",
1781                           info->use_short_preamble);
1782         }
1783
1784         if (changed & BSS_CHANGED_ERP_SLOT) {
1785                 wiphy_dbg(hw->wiphy, "  ERP_SLOT: %d\n", info->use_short_slot);
1786         }
1787
1788         if (changed & BSS_CHANGED_HT) {
1789                 wiphy_dbg(hw->wiphy, "  HT: op_mode=0x%x\n",
1790                           info->ht_operation_mode);
1791         }
1792
1793         if (changed & BSS_CHANGED_BASIC_RATES) {
1794                 wiphy_dbg(hw->wiphy, "  BASIC_RATES: 0x%llx\n",
1795                           (unsigned long long) info->basic_rates);
1796         }
1797
1798         if (changed & BSS_CHANGED_TXPOWER)
1799                 wiphy_dbg(hw->wiphy, "  TX Power: %d dBm\n", info->txpower);
1800 }
1801
1802 static int mac80211_hwsim_sta_add(struct ieee80211_hw *hw,
1803                                   struct ieee80211_vif *vif,
1804                                   struct ieee80211_sta *sta)
1805 {
1806         hwsim_check_magic(vif);
1807         hwsim_set_sta_magic(sta);
1808
1809         return 0;
1810 }
1811
1812 static int mac80211_hwsim_sta_remove(struct ieee80211_hw *hw,
1813                                      struct ieee80211_vif *vif,
1814                                      struct ieee80211_sta *sta)
1815 {
1816         hwsim_check_magic(vif);
1817         hwsim_clear_sta_magic(sta);
1818
1819         return 0;
1820 }
1821
1822 static void mac80211_hwsim_sta_notify(struct ieee80211_hw *hw,
1823                                       struct ieee80211_vif *vif,
1824                                       enum sta_notify_cmd cmd,
1825                                       struct ieee80211_sta *sta)
1826 {
1827         hwsim_check_magic(vif);
1828
1829         switch (cmd) {
1830         case STA_NOTIFY_SLEEP:
1831         case STA_NOTIFY_AWAKE:
1832                 /* TODO: make good use of these flags */
1833                 break;
1834         default:
1835                 WARN(1, "Invalid sta notify: %d\n", cmd);
1836                 break;
1837         }
1838 }
1839
1840 static int mac80211_hwsim_set_tim(struct ieee80211_hw *hw,
1841                                   struct ieee80211_sta *sta,
1842                                   bool set)
1843 {
1844         hwsim_check_sta_magic(sta);
1845         return 0;
1846 }
1847
1848 static int mac80211_hwsim_conf_tx(
1849         struct ieee80211_hw *hw,
1850         struct ieee80211_vif *vif, u16 queue,
1851         const struct ieee80211_tx_queue_params *params)
1852 {
1853         wiphy_dbg(hw->wiphy,
1854                   "%s (queue=%d txop=%d cw_min=%d cw_max=%d aifs=%d)\n",
1855                   __func__, queue,
1856                   params->txop, params->cw_min,
1857                   params->cw_max, params->aifs);
1858         return 0;
1859 }
1860
1861 static int mac80211_hwsim_get_survey(struct ieee80211_hw *hw, int idx,
1862                                      struct survey_info *survey)
1863 {
1864         struct mac80211_hwsim_data *hwsim = hw->priv;
1865
1866         if (idx < 0 || idx >= ARRAY_SIZE(hwsim->survey_data))
1867                 return -ENOENT;
1868
1869         mutex_lock(&hwsim->mutex);
1870         survey->channel = hwsim->survey_data[idx].channel;
1871         if (!survey->channel) {
1872                 mutex_unlock(&hwsim->mutex);
1873                 return -ENOENT;
1874         }
1875
1876         /*
1877          * Magically conjured dummy values --- this is only ok for simulated hardware.
1878          *
1879          * A real driver which cannot determine real values noise MUST NOT
1880          * report any, especially not a magically conjured ones :-)
1881          */
1882         survey->filled = SURVEY_INFO_NOISE_DBM |
1883                          SURVEY_INFO_TIME |
1884                          SURVEY_INFO_TIME_BUSY;
1885         survey->noise = -92;
1886         survey->time =
1887                 jiffies_to_msecs(hwsim->survey_data[idx].end -
1888                                  hwsim->survey_data[idx].start);
1889         /* report 12.5% of channel time is used */
1890         survey->time_busy = survey->time/8;
1891         mutex_unlock(&hwsim->mutex);
1892
1893         return 0;
1894 }
1895
1896 #ifdef CONFIG_NL80211_TESTMODE
1897 /*
1898  * This section contains example code for using netlink
1899  * attributes with the testmode command in nl80211.
1900  */
1901
1902 /* These enums need to be kept in sync with userspace */
1903 enum hwsim_testmode_attr {
1904         __HWSIM_TM_ATTR_INVALID = 0,
1905         HWSIM_TM_ATTR_CMD       = 1,
1906         HWSIM_TM_ATTR_PS        = 2,
1907
1908         /* keep last */
1909         __HWSIM_TM_ATTR_AFTER_LAST,
1910         HWSIM_TM_ATTR_MAX       = __HWSIM_TM_ATTR_AFTER_LAST - 1
1911 };
1912
1913 enum hwsim_testmode_cmd {
1914         HWSIM_TM_CMD_SET_PS             = 0,
1915         HWSIM_TM_CMD_GET_PS             = 1,
1916         HWSIM_TM_CMD_STOP_QUEUES        = 2,
1917         HWSIM_TM_CMD_WAKE_QUEUES        = 3,
1918 };
1919
1920 static const struct nla_policy hwsim_testmode_policy[HWSIM_TM_ATTR_MAX + 1] = {
1921         [HWSIM_TM_ATTR_CMD] = { .type = NLA_U32 },
1922         [HWSIM_TM_ATTR_PS] = { .type = NLA_U32 },
1923 };
1924
1925 static int mac80211_hwsim_testmode_cmd(struct ieee80211_hw *hw,
1926                                        struct ieee80211_vif *vif,
1927                                        void *data, int len)
1928 {
1929         struct mac80211_hwsim_data *hwsim = hw->priv;
1930         struct nlattr *tb[HWSIM_TM_ATTR_MAX + 1];
1931         struct sk_buff *skb;
1932         int err, ps;
1933
1934         err = nla_parse_deprecated(tb, HWSIM_TM_ATTR_MAX, data, len,
1935                                    hwsim_testmode_policy, NULL);
1936         if (err)
1937                 return err;
1938
1939         if (!tb[HWSIM_TM_ATTR_CMD])
1940                 return -EINVAL;
1941
1942         switch (nla_get_u32(tb[HWSIM_TM_ATTR_CMD])) {
1943         case HWSIM_TM_CMD_SET_PS:
1944                 if (!tb[HWSIM_TM_ATTR_PS])
1945                         return -EINVAL;
1946                 ps = nla_get_u32(tb[HWSIM_TM_ATTR_PS]);
1947                 return hwsim_fops_ps_write(hwsim, ps);
1948         case HWSIM_TM_CMD_GET_PS:
1949                 skb = cfg80211_testmode_alloc_reply_skb(hw->wiphy,
1950                                                 nla_total_size(sizeof(u32)));
1951                 if (!skb)
1952                         return -ENOMEM;
1953                 if (nla_put_u32(skb, HWSIM_TM_ATTR_PS, hwsim->ps))
1954                         goto nla_put_failure;
1955                 return cfg80211_testmode_reply(skb);
1956         case HWSIM_TM_CMD_STOP_QUEUES:
1957                 ieee80211_stop_queues(hw);
1958                 return 0;
1959         case HWSIM_TM_CMD_WAKE_QUEUES:
1960                 ieee80211_wake_queues(hw);
1961                 return 0;
1962         default:
1963                 return -EOPNOTSUPP;
1964         }
1965
1966  nla_put_failure:
1967         kfree_skb(skb);
1968         return -ENOBUFS;
1969 }
1970 #endif
1971
1972 static int mac80211_hwsim_ampdu_action(struct ieee80211_hw *hw,
1973                                        struct ieee80211_vif *vif,
1974                                        struct ieee80211_ampdu_params *params)
1975 {
1976         struct ieee80211_sta *sta = params->sta;
1977         enum ieee80211_ampdu_mlme_action action = params->action;
1978         u16 tid = params->tid;
1979
1980         switch (action) {
1981         case IEEE80211_AMPDU_TX_START:
1982                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1983                 break;
1984         case IEEE80211_AMPDU_TX_STOP_CONT:
1985         case IEEE80211_AMPDU_TX_STOP_FLUSH:
1986         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
1987                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1988                 break;
1989         case IEEE80211_AMPDU_TX_OPERATIONAL:
1990                 break;
1991         case IEEE80211_AMPDU_RX_START:
1992         case IEEE80211_AMPDU_RX_STOP:
1993                 break;
1994         default:
1995                 return -EOPNOTSUPP;
1996         }
1997
1998         return 0;
1999 }
2000
2001 static void mac80211_hwsim_flush(struct ieee80211_hw *hw,
2002                                  struct ieee80211_vif *vif,
2003                                  u32 queues, bool drop)
2004 {
2005         /* Not implemented, queues only on kernel side */
2006 }
2007
2008 static void hw_scan_work(struct work_struct *work)
2009 {
2010         struct mac80211_hwsim_data *hwsim =
2011                 container_of(work, struct mac80211_hwsim_data, hw_scan.work);
2012         struct cfg80211_scan_request *req = hwsim->hw_scan_request;
2013         int dwell, i;
2014
2015         mutex_lock(&hwsim->mutex);
2016         if (hwsim->scan_chan_idx >= req->n_channels) {
2017                 struct cfg80211_scan_info info = {
2018                         .aborted = false,
2019                 };
2020
2021                 wiphy_dbg(hwsim->hw->wiphy, "hw scan complete\n");
2022                 ieee80211_scan_completed(hwsim->hw, &info);
2023                 hwsim->hw_scan_request = NULL;
2024                 hwsim->hw_scan_vif = NULL;
2025                 hwsim->tmp_chan = NULL;
2026                 mutex_unlock(&hwsim->mutex);
2027                 return;
2028         }
2029
2030         wiphy_dbg(hwsim->hw->wiphy, "hw scan %d MHz\n",
2031                   req->channels[hwsim->scan_chan_idx]->center_freq);
2032
2033         hwsim->tmp_chan = req->channels[hwsim->scan_chan_idx];
2034         if (hwsim->tmp_chan->flags & (IEEE80211_CHAN_NO_IR |
2035                                       IEEE80211_CHAN_RADAR) ||
2036             !req->n_ssids) {
2037                 dwell = 120;
2038         } else {
2039                 dwell = 30;
2040                 /* send probes */
2041                 for (i = 0; i < req->n_ssids; i++) {
2042                         struct sk_buff *probe;
2043                         struct ieee80211_mgmt *mgmt;
2044
2045                         probe = ieee80211_probereq_get(hwsim->hw,
2046                                                        hwsim->scan_addr,
2047                                                        req->ssids[i].ssid,
2048                                                        req->ssids[i].ssid_len,
2049                                                        req->ie_len);
2050                         if (!probe)
2051                                 continue;
2052
2053                         mgmt = (struct ieee80211_mgmt *) probe->data;
2054                         memcpy(mgmt->da, req->bssid, ETH_ALEN);
2055                         memcpy(mgmt->bssid, req->bssid, ETH_ALEN);
2056
2057                         if (req->ie_len)
2058                                 skb_put_data(probe, req->ie, req->ie_len);
2059
2060                         local_bh_disable();
2061                         mac80211_hwsim_tx_frame(hwsim->hw, probe,
2062                                                 hwsim->tmp_chan);
2063                         local_bh_enable();
2064                 }
2065         }
2066         ieee80211_queue_delayed_work(hwsim->hw, &hwsim->hw_scan,
2067                                      msecs_to_jiffies(dwell));
2068         hwsim->survey_data[hwsim->scan_chan_idx].channel = hwsim->tmp_chan;
2069         hwsim->survey_data[hwsim->scan_chan_idx].start = jiffies;
2070         hwsim->survey_data[hwsim->scan_chan_idx].end =
2071                 jiffies + msecs_to_jiffies(dwell);
2072         hwsim->scan_chan_idx++;
2073         mutex_unlock(&hwsim->mutex);
2074 }
2075
2076 static int mac80211_hwsim_hw_scan(struct ieee80211_hw *hw,
2077                                   struct ieee80211_vif *vif,
2078                                   struct ieee80211_scan_request *hw_req)
2079 {
2080         struct mac80211_hwsim_data *hwsim = hw->priv;
2081         struct cfg80211_scan_request *req = &hw_req->req;
2082
2083         mutex_lock(&hwsim->mutex);
2084         if (WARN_ON(hwsim->tmp_chan || hwsim->hw_scan_request)) {
2085                 mutex_unlock(&hwsim->mutex);
2086                 return -EBUSY;
2087         }
2088         hwsim->hw_scan_request = req;
2089         hwsim->hw_scan_vif = vif;
2090         hwsim->scan_chan_idx = 0;
2091         if (req->flags & NL80211_SCAN_FLAG_RANDOM_ADDR)
2092                 get_random_mask_addr(hwsim->scan_addr,
2093                                      hw_req->req.mac_addr,
2094                                      hw_req->req.mac_addr_mask);
2095         else
2096                 memcpy(hwsim->scan_addr, vif->addr, ETH_ALEN);
2097         memset(hwsim->survey_data, 0, sizeof(hwsim->survey_data));
2098         mutex_unlock(&hwsim->mutex);
2099
2100         wiphy_dbg(hw->wiphy, "hwsim hw_scan request\n");
2101
2102         ieee80211_queue_delayed_work(hwsim->hw, &hwsim->hw_scan, 0);
2103
2104         return 0;
2105 }
2106
2107 static void mac80211_hwsim_cancel_hw_scan(struct ieee80211_hw *hw,
2108                                           struct ieee80211_vif *vif)
2109 {
2110         struct mac80211_hwsim_data *hwsim = hw->priv;
2111         struct cfg80211_scan_info info = {
2112                 .aborted = true,
2113         };
2114
2115         wiphy_dbg(hw->wiphy, "hwsim cancel_hw_scan\n");
2116
2117         cancel_delayed_work_sync(&hwsim->hw_scan);
2118
2119         mutex_lock(&hwsim->mutex);
2120         ieee80211_scan_completed(hwsim->hw, &info);
2121         hwsim->tmp_chan = NULL;
2122         hwsim->hw_scan_request = NULL;
2123         hwsim->hw_scan_vif = NULL;
2124         mutex_unlock(&hwsim->mutex);
2125 }
2126
2127 static void mac80211_hwsim_sw_scan(struct ieee80211_hw *hw,
2128                                    struct ieee80211_vif *vif,
2129                                    const u8 *mac_addr)
2130 {
2131         struct mac80211_hwsim_data *hwsim = hw->priv;
2132
2133         mutex_lock(&hwsim->mutex);
2134
2135         if (hwsim->scanning) {
2136                 pr_debug("two hwsim sw_scans detected!\n");
2137                 goto out;
2138         }
2139
2140         pr_debug("hwsim sw_scan request, prepping stuff\n");
2141
2142         memcpy(hwsim->scan_addr, mac_addr, ETH_ALEN);
2143         hwsim->scanning = true;
2144         memset(hwsim->survey_data, 0, sizeof(hwsim->survey_data));
2145
2146 out:
2147         mutex_unlock(&hwsim->mutex);
2148 }
2149
2150 static void mac80211_hwsim_sw_scan_complete(struct ieee80211_hw *hw,
2151                                             struct ieee80211_vif *vif)
2152 {
2153         struct mac80211_hwsim_data *hwsim = hw->priv;
2154
2155         mutex_lock(&hwsim->mutex);
2156
2157         pr_debug("hwsim sw_scan_complete\n");
2158         hwsim->scanning = false;
2159         eth_zero_addr(hwsim->scan_addr);
2160
2161         mutex_unlock(&hwsim->mutex);
2162 }
2163
2164 static void hw_roc_start(struct work_struct *work)
2165 {
2166         struct mac80211_hwsim_data *hwsim =
2167                 container_of(work, struct mac80211_hwsim_data, roc_start.work);
2168
2169         mutex_lock(&hwsim->mutex);
2170
2171         wiphy_dbg(hwsim->hw->wiphy, "hwsim ROC begins\n");
2172         hwsim->tmp_chan = hwsim->roc_chan;
2173         ieee80211_ready_on_channel(hwsim->hw);
2174
2175         ieee80211_queue_delayed_work(hwsim->hw, &hwsim->roc_done,
2176                                      msecs_to_jiffies(hwsim->roc_duration));
2177
2178         mutex_unlock(&hwsim->mutex);
2179 }
2180
2181 static void hw_roc_done(struct work_struct *work)
2182 {
2183         struct mac80211_hwsim_data *hwsim =
2184                 container_of(work, struct mac80211_hwsim_data, roc_done.work);
2185
2186         mutex_lock(&hwsim->mutex);
2187         ieee80211_remain_on_channel_expired(hwsim->hw);
2188         hwsim->tmp_chan = NULL;
2189         mutex_unlock(&hwsim->mutex);
2190
2191         wiphy_dbg(hwsim->hw->wiphy, "hwsim ROC expired\n");
2192 }
2193
2194 static int mac80211_hwsim_roc(struct ieee80211_hw *hw,
2195                               struct ieee80211_vif *vif,
2196                               struct ieee80211_channel *chan,
2197                               int duration,
2198                               enum ieee80211_roc_type type)
2199 {
2200         struct mac80211_hwsim_data *hwsim = hw->priv;
2201
2202         mutex_lock(&hwsim->mutex);
2203         if (WARN_ON(hwsim->tmp_chan || hwsim->hw_scan_request)) {
2204                 mutex_unlock(&hwsim->mutex);
2205                 return -EBUSY;
2206         }
2207
2208         hwsim->roc_chan = chan;
2209         hwsim->roc_duration = duration;
2210         mutex_unlock(&hwsim->mutex);
2211
2212         wiphy_dbg(hw->wiphy, "hwsim ROC (%d MHz, %d ms)\n",
2213                   chan->center_freq, duration);
2214         ieee80211_queue_delayed_work(hw, &hwsim->roc_start, HZ/50);
2215
2216         return 0;
2217 }
2218
2219 static int mac80211_hwsim_croc(struct ieee80211_hw *hw)
2220 {
2221         struct mac80211_hwsim_data *hwsim = hw->priv;
2222
2223         cancel_delayed_work_sync(&hwsim->roc_start);
2224         cancel_delayed_work_sync(&hwsim->roc_done);
2225
2226         mutex_lock(&hwsim->mutex);
2227         hwsim->tmp_chan = NULL;
2228         mutex_unlock(&hwsim->mutex);
2229
2230         wiphy_dbg(hw->wiphy, "hwsim ROC canceled\n");
2231
2232         return 0;
2233 }
2234
2235 static int mac80211_hwsim_add_chanctx(struct ieee80211_hw *hw,
2236                                       struct ieee80211_chanctx_conf *ctx)
2237 {
2238         hwsim_set_chanctx_magic(ctx);
2239         wiphy_dbg(hw->wiphy,
2240                   "add channel context control: %d MHz/width: %d/cfreqs:%d/%d MHz\n",
2241                   ctx->def.chan->center_freq, ctx->def.width,
2242                   ctx->def.center_freq1, ctx->def.center_freq2);
2243         return 0;
2244 }
2245
2246 static void mac80211_hwsim_remove_chanctx(struct ieee80211_hw *hw,
2247                                           struct ieee80211_chanctx_conf *ctx)
2248 {
2249         wiphy_dbg(hw->wiphy,
2250                   "remove channel context control: %d MHz/width: %d/cfreqs:%d/%d MHz\n",
2251                   ctx->def.chan->center_freq, ctx->def.width,
2252                   ctx->def.center_freq1, ctx->def.center_freq2);
2253         hwsim_check_chanctx_magic(ctx);
2254         hwsim_clear_chanctx_magic(ctx);
2255 }
2256
2257 static void mac80211_hwsim_change_chanctx(struct ieee80211_hw *hw,
2258                                           struct ieee80211_chanctx_conf *ctx,
2259                                           u32 changed)
2260 {
2261         hwsim_check_chanctx_magic(ctx);
2262         wiphy_dbg(hw->wiphy,
2263                   "change channel context control: %d MHz/width: %d/cfreqs:%d/%d MHz\n",
2264                   ctx->def.chan->center_freq, ctx->def.width,
2265                   ctx->def.center_freq1, ctx->def.center_freq2);
2266 }
2267
2268 static int mac80211_hwsim_assign_vif_chanctx(struct ieee80211_hw *hw,
2269                                              struct ieee80211_vif *vif,
2270                                              struct ieee80211_chanctx_conf *ctx)
2271 {
2272         hwsim_check_magic(vif);
2273         hwsim_check_chanctx_magic(ctx);
2274
2275         return 0;
2276 }
2277
2278 static void mac80211_hwsim_unassign_vif_chanctx(struct ieee80211_hw *hw,
2279                                                 struct ieee80211_vif *vif,
2280                                                 struct ieee80211_chanctx_conf *ctx)
2281 {
2282         hwsim_check_magic(vif);
2283         hwsim_check_chanctx_magic(ctx);
2284 }
2285
2286 static const char mac80211_hwsim_gstrings_stats[][ETH_GSTRING_LEN] = {
2287         "tx_pkts_nic",
2288         "tx_bytes_nic",
2289         "rx_pkts_nic",
2290         "rx_bytes_nic",
2291         "d_tx_dropped",
2292         "d_tx_failed",
2293         "d_ps_mode",
2294         "d_group",
2295 };
2296
2297 #define MAC80211_HWSIM_SSTATS_LEN ARRAY_SIZE(mac80211_hwsim_gstrings_stats)
2298
2299 static void mac80211_hwsim_get_et_strings(struct ieee80211_hw *hw,
2300                                           struct ieee80211_vif *vif,
2301                                           u32 sset, u8 *data)
2302 {
2303         if (sset == ETH_SS_STATS)
2304                 memcpy(data, *mac80211_hwsim_gstrings_stats,
2305                        sizeof(mac80211_hwsim_gstrings_stats));
2306 }
2307
2308 static int mac80211_hwsim_get_et_sset_count(struct ieee80211_hw *hw,
2309                                             struct ieee80211_vif *vif, int sset)
2310 {
2311         if (sset == ETH_SS_STATS)
2312                 return MAC80211_HWSIM_SSTATS_LEN;
2313         return 0;
2314 }
2315
2316 static void mac80211_hwsim_get_et_stats(struct ieee80211_hw *hw,
2317                                         struct ieee80211_vif *vif,
2318                                         struct ethtool_stats *stats, u64 *data)
2319 {
2320         struct mac80211_hwsim_data *ar = hw->priv;
2321         int i = 0;
2322
2323         data[i++] = ar->tx_pkts;
2324         data[i++] = ar->tx_bytes;
2325         data[i++] = ar->rx_pkts;
2326         data[i++] = ar->rx_bytes;
2327         data[i++] = ar->tx_dropped;
2328         data[i++] = ar->tx_failed;
2329         data[i++] = ar->ps;
2330         data[i++] = ar->group;
2331
2332         WARN_ON(i != MAC80211_HWSIM_SSTATS_LEN);
2333 }
2334
2335 #define HWSIM_COMMON_OPS                                        \
2336         .tx = mac80211_hwsim_tx,                                \
2337         .start = mac80211_hwsim_start,                          \
2338         .stop = mac80211_hwsim_stop,                            \
2339         .add_interface = mac80211_hwsim_add_interface,          \
2340         .change_interface = mac80211_hwsim_change_interface,    \
2341         .remove_interface = mac80211_hwsim_remove_interface,    \
2342         .config = mac80211_hwsim_config,                        \
2343         .configure_filter = mac80211_hwsim_configure_filter,    \
2344         .bss_info_changed = mac80211_hwsim_bss_info_changed,    \
2345         .sta_add = mac80211_hwsim_sta_add,                      \
2346         .sta_remove = mac80211_hwsim_sta_remove,                \
2347         .sta_notify = mac80211_hwsim_sta_notify,                \
2348         .set_tim = mac80211_hwsim_set_tim,                      \
2349         .conf_tx = mac80211_hwsim_conf_tx,                      \
2350         .get_survey = mac80211_hwsim_get_survey,                \
2351         CFG80211_TESTMODE_CMD(mac80211_hwsim_testmode_cmd)      \
2352         .ampdu_action = mac80211_hwsim_ampdu_action,            \
2353         .flush = mac80211_hwsim_flush,                          \
2354         .get_tsf = mac80211_hwsim_get_tsf,                      \
2355         .set_tsf = mac80211_hwsim_set_tsf,                      \
2356         .get_et_sset_count = mac80211_hwsim_get_et_sset_count,  \
2357         .get_et_stats = mac80211_hwsim_get_et_stats,            \
2358         .get_et_strings = mac80211_hwsim_get_et_strings,
2359
2360 static const struct ieee80211_ops mac80211_hwsim_ops = {
2361         HWSIM_COMMON_OPS
2362         .sw_scan_start = mac80211_hwsim_sw_scan,
2363         .sw_scan_complete = mac80211_hwsim_sw_scan_complete,
2364 };
2365
2366 static const struct ieee80211_ops mac80211_hwsim_mchan_ops = {
2367         HWSIM_COMMON_OPS
2368         .hw_scan = mac80211_hwsim_hw_scan,
2369         .cancel_hw_scan = mac80211_hwsim_cancel_hw_scan,
2370         .sw_scan_start = NULL,
2371         .sw_scan_complete = NULL,
2372         .remain_on_channel = mac80211_hwsim_roc,
2373         .cancel_remain_on_channel = mac80211_hwsim_croc,
2374         .add_chanctx = mac80211_hwsim_add_chanctx,
2375         .remove_chanctx = mac80211_hwsim_remove_chanctx,
2376         .change_chanctx = mac80211_hwsim_change_chanctx,
2377         .assign_vif_chanctx = mac80211_hwsim_assign_vif_chanctx,
2378         .unassign_vif_chanctx = mac80211_hwsim_unassign_vif_chanctx,
2379 };
2380
2381 struct hwsim_new_radio_params {
2382         unsigned int channels;
2383         const char *reg_alpha2;
2384         const struct ieee80211_regdomain *regd;
2385         bool reg_strict;
2386         bool p2p_device;
2387         bool use_chanctx;
2388         bool destroy_on_close;
2389         const char *hwname;
2390         bool no_vif;
2391         const u8 *perm_addr;
2392         u32 iftypes;
2393         u32 *ciphers;
2394         u8 n_ciphers;
2395 };
2396
2397 static void hwsim_mcast_config_msg(struct sk_buff *mcast_skb,
2398                                    struct genl_info *info)
2399 {
2400         if (info)
2401                 genl_notify(&hwsim_genl_family, mcast_skb, info,
2402                             HWSIM_MCGRP_CONFIG, GFP_KERNEL);
2403         else
2404                 genlmsg_multicast(&hwsim_genl_family, mcast_skb, 0,
2405                                   HWSIM_MCGRP_CONFIG, GFP_KERNEL);
2406 }
2407
2408 static int append_radio_msg(struct sk_buff *skb, int id,
2409                             struct hwsim_new_radio_params *param)
2410 {
2411         int ret;
2412
2413         ret = nla_put_u32(skb, HWSIM_ATTR_RADIO_ID, id);
2414         if (ret < 0)
2415                 return ret;
2416
2417         if (param->channels) {
2418                 ret = nla_put_u32(skb, HWSIM_ATTR_CHANNELS, param->channels);
2419                 if (ret < 0)
2420                         return ret;
2421         }
2422
2423         if (param->reg_alpha2) {
2424                 ret = nla_put(skb, HWSIM_ATTR_REG_HINT_ALPHA2, 2,
2425                               param->reg_alpha2);
2426                 if (ret < 0)
2427                         return ret;
2428         }
2429
2430         if (param->regd) {
2431                 int i;
2432
2433                 for (i = 0; i < ARRAY_SIZE(hwsim_world_regdom_custom); i++) {
2434                         if (hwsim_world_regdom_custom[i] != param->regd)
2435                                 continue;
2436
2437                         ret = nla_put_u32(skb, HWSIM_ATTR_REG_CUSTOM_REG, i);
2438                         if (ret < 0)
2439                                 return ret;
2440                         break;
2441                 }
2442         }
2443
2444         if (param->reg_strict) {
2445                 ret = nla_put_flag(skb, HWSIM_ATTR_REG_STRICT_REG);
2446                 if (ret < 0)
2447                         return ret;
2448         }
2449
2450         if (param->p2p_device) {
2451                 ret = nla_put_flag(skb, HWSIM_ATTR_SUPPORT_P2P_DEVICE);
2452                 if (ret < 0)
2453                         return ret;
2454         }
2455
2456         if (param->use_chanctx) {
2457                 ret = nla_put_flag(skb, HWSIM_ATTR_USE_CHANCTX);
2458                 if (ret < 0)
2459                         return ret;
2460         }
2461
2462         if (param->hwname) {
2463                 ret = nla_put(skb, HWSIM_ATTR_RADIO_NAME,
2464                               strlen(param->hwname), param->hwname);
2465                 if (ret < 0)
2466                         return ret;
2467         }
2468
2469         return 0;
2470 }
2471
2472 static void hwsim_mcast_new_radio(int id, struct genl_info *info,
2473                                   struct hwsim_new_radio_params *param)
2474 {
2475         struct sk_buff *mcast_skb;
2476         void *data;
2477
2478         mcast_skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2479         if (!mcast_skb)
2480                 return;
2481
2482         data = genlmsg_put(mcast_skb, 0, 0, &hwsim_genl_family, 0,
2483                            HWSIM_CMD_NEW_RADIO);
2484         if (!data)
2485                 goto out_err;
2486
2487         if (append_radio_msg(mcast_skb, id, param) < 0)
2488                 goto out_err;
2489
2490         genlmsg_end(mcast_skb, data);
2491
2492         hwsim_mcast_config_msg(mcast_skb, info);
2493         return;
2494
2495 out_err:
2496         nlmsg_free(mcast_skb);
2497 }
2498
2499 static const struct ieee80211_sband_iftype_data he_capa_2ghz = {
2500         /* TODO: should we support other types, e.g., P2P?*/
2501         .types_mask = BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_AP),
2502         .he_cap = {
2503                 .has_he = true,
2504                 .he_cap_elem = {
2505                         .mac_cap_info[0] =
2506                                 IEEE80211_HE_MAC_CAP0_HTC_HE,
2507                         .mac_cap_info[1] =
2508                                 IEEE80211_HE_MAC_CAP1_TF_MAC_PAD_DUR_16US |
2509                                 IEEE80211_HE_MAC_CAP1_MULTI_TID_AGG_RX_QOS_8,
2510                         .mac_cap_info[2] =
2511                                 IEEE80211_HE_MAC_CAP2_BSR |
2512                                 IEEE80211_HE_MAC_CAP2_MU_CASCADING |
2513                                 IEEE80211_HE_MAC_CAP2_ACK_EN,
2514                         .mac_cap_info[3] =
2515                                 IEEE80211_HE_MAC_CAP3_OMI_CONTROL |
2516                                 IEEE80211_HE_MAC_CAP3_MAX_AMPDU_LEN_EXP_VHT_2,
2517                         .mac_cap_info[4] = IEEE80211_HE_MAC_CAP4_AMDSU_IN_AMPDU,
2518                         .phy_cap_info[1] =
2519                                 IEEE80211_HE_PHY_CAP1_PREAMBLE_PUNC_RX_MASK |
2520                                 IEEE80211_HE_PHY_CAP1_DEVICE_CLASS_A |
2521                                 IEEE80211_HE_PHY_CAP1_LDPC_CODING_IN_PAYLOAD |
2522                                 IEEE80211_HE_PHY_CAP1_MIDAMBLE_RX_TX_MAX_NSTS,
2523                         .phy_cap_info[2] =
2524                                 IEEE80211_HE_PHY_CAP2_NDP_4x_LTF_AND_3_2US |
2525                                 IEEE80211_HE_PHY_CAP2_STBC_TX_UNDER_80MHZ |
2526                                 IEEE80211_HE_PHY_CAP2_STBC_RX_UNDER_80MHZ |
2527                                 IEEE80211_HE_PHY_CAP2_UL_MU_FULL_MU_MIMO |
2528                                 IEEE80211_HE_PHY_CAP2_UL_MU_PARTIAL_MU_MIMO,
2529
2530                         /* Leave all the other PHY capability bytes unset, as
2531                          * DCM, beam forming, RU and PPE threshold information
2532                          * are not supported
2533                          */
2534                 },
2535                 .he_mcs_nss_supp = {
2536                         .rx_mcs_80 = cpu_to_le16(0xfffa),
2537                         .tx_mcs_80 = cpu_to_le16(0xfffa),
2538                         .rx_mcs_160 = cpu_to_le16(0xffff),
2539                         .tx_mcs_160 = cpu_to_le16(0xffff),
2540                         .rx_mcs_80p80 = cpu_to_le16(0xffff),
2541                         .tx_mcs_80p80 = cpu_to_le16(0xffff),
2542                 },
2543         },
2544 };
2545
2546 static const struct ieee80211_sband_iftype_data he_capa_5ghz = {
2547         /* TODO: should we support other types, e.g., P2P?*/
2548         .types_mask = BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_AP),
2549         .he_cap = {
2550                 .has_he = true,
2551                 .he_cap_elem = {
2552                         .mac_cap_info[0] =
2553                                 IEEE80211_HE_MAC_CAP0_HTC_HE,
2554                         .mac_cap_info[1] =
2555                                 IEEE80211_HE_MAC_CAP1_TF_MAC_PAD_DUR_16US |
2556                                 IEEE80211_HE_MAC_CAP1_MULTI_TID_AGG_RX_QOS_8,
2557                         .mac_cap_info[2] =
2558                                 IEEE80211_HE_MAC_CAP2_BSR |
2559                                 IEEE80211_HE_MAC_CAP2_MU_CASCADING |
2560                                 IEEE80211_HE_MAC_CAP2_ACK_EN,
2561                         .mac_cap_info[3] =
2562                                 IEEE80211_HE_MAC_CAP3_OMI_CONTROL |
2563                                 IEEE80211_HE_MAC_CAP3_MAX_AMPDU_LEN_EXP_VHT_2,
2564                         .mac_cap_info[4] = IEEE80211_HE_MAC_CAP4_AMDSU_IN_AMPDU,
2565                         .phy_cap_info[0] =
2566                                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G |
2567                                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G |
2568                                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G,
2569                         .phy_cap_info[1] =
2570                                 IEEE80211_HE_PHY_CAP1_PREAMBLE_PUNC_RX_MASK |
2571                                 IEEE80211_HE_PHY_CAP1_DEVICE_CLASS_A |
2572                                 IEEE80211_HE_PHY_CAP1_LDPC_CODING_IN_PAYLOAD |
2573                                 IEEE80211_HE_PHY_CAP1_MIDAMBLE_RX_TX_MAX_NSTS,
2574                         .phy_cap_info[2] =
2575                                 IEEE80211_HE_PHY_CAP2_NDP_4x_LTF_AND_3_2US |
2576                                 IEEE80211_HE_PHY_CAP2_STBC_TX_UNDER_80MHZ |
2577                                 IEEE80211_HE_PHY_CAP2_STBC_RX_UNDER_80MHZ |
2578                                 IEEE80211_HE_PHY_CAP2_UL_MU_FULL_MU_MIMO |
2579                                 IEEE80211_HE_PHY_CAP2_UL_MU_PARTIAL_MU_MIMO,
2580
2581                         /* Leave all the other PHY capability bytes unset, as
2582                          * DCM, beam forming, RU and PPE threshold information
2583                          * are not supported
2584                          */
2585                 },
2586                 .he_mcs_nss_supp = {
2587                         .rx_mcs_80 = cpu_to_le16(0xfffa),
2588                         .tx_mcs_80 = cpu_to_le16(0xfffa),
2589                         .rx_mcs_160 = cpu_to_le16(0xfffa),
2590                         .tx_mcs_160 = cpu_to_le16(0xfffa),
2591                         .rx_mcs_80p80 = cpu_to_le16(0xfffa),
2592                         .tx_mcs_80p80 = cpu_to_le16(0xfffa),
2593                 },
2594         },
2595 };
2596
2597 static void mac80211_hswim_he_capab(struct ieee80211_supported_band *sband)
2598 {
2599         if (sband->band == NL80211_BAND_2GHZ)
2600                 sband->iftype_data =
2601                         (struct ieee80211_sband_iftype_data *)&he_capa_2ghz;
2602         else if (sband->band == NL80211_BAND_5GHZ)
2603                 sband->iftype_data =
2604                         (struct ieee80211_sband_iftype_data *)&he_capa_5ghz;
2605         else
2606                 return;
2607
2608         sband->n_iftype_data = 1;
2609 }
2610
2611 #ifdef CONFIG_MAC80211_MESH
2612 #define HWSIM_MESH_BIT BIT(NL80211_IFTYPE_MESH_POINT)
2613 #else
2614 #define HWSIM_MESH_BIT 0
2615 #endif
2616
2617 #define HWSIM_DEFAULT_IF_LIMIT \
2618         (BIT(NL80211_IFTYPE_STATION) | \
2619          BIT(NL80211_IFTYPE_P2P_CLIENT) | \
2620          BIT(NL80211_IFTYPE_AP) | \
2621          BIT(NL80211_IFTYPE_P2P_GO) | \
2622          HWSIM_MESH_BIT)
2623
2624 #define HWSIM_IFTYPE_SUPPORT_MASK \
2625         (BIT(NL80211_IFTYPE_STATION) | \
2626          BIT(NL80211_IFTYPE_AP) | \
2627          BIT(NL80211_IFTYPE_P2P_CLIENT) | \
2628          BIT(NL80211_IFTYPE_P2P_GO) | \
2629          BIT(NL80211_IFTYPE_ADHOC) | \
2630          BIT(NL80211_IFTYPE_MESH_POINT))
2631
2632 static int mac80211_hwsim_new_radio(struct genl_info *info,
2633                                     struct hwsim_new_radio_params *param)
2634 {
2635         int err;
2636         u8 addr[ETH_ALEN];
2637         struct mac80211_hwsim_data *data;
2638         struct ieee80211_hw *hw;
2639         enum nl80211_band band;
2640         const struct ieee80211_ops *ops = &mac80211_hwsim_ops;
2641         struct net *net;
2642         int idx, i;
2643         int n_limits = 0;
2644
2645         if (WARN_ON(param->channels > 1 && !param->use_chanctx))
2646                 return -EINVAL;
2647
2648         spin_lock_bh(&hwsim_radio_lock);
2649         idx = hwsim_radio_idx++;
2650         spin_unlock_bh(&hwsim_radio_lock);
2651
2652         if (param->use_chanctx)
2653                 ops = &mac80211_hwsim_mchan_ops;
2654         hw = ieee80211_alloc_hw_nm(sizeof(*data), ops, param->hwname);
2655         if (!hw) {
2656                 pr_debug("mac80211_hwsim: ieee80211_alloc_hw failed\n");
2657                 err = -ENOMEM;
2658                 goto failed;
2659         }
2660
2661         /* ieee80211_alloc_hw_nm may have used a default name */
2662         param->hwname = wiphy_name(hw->wiphy);
2663
2664         if (info)
2665                 net = genl_info_net(info);
2666         else
2667                 net = &init_net;
2668         wiphy_net_set(hw->wiphy, net);
2669
2670         data = hw->priv;
2671         data->hw = hw;
2672
2673         data->dev = device_create(hwsim_class, NULL, 0, hw, "hwsim%d", idx);
2674         if (IS_ERR(data->dev)) {
2675                 printk(KERN_DEBUG
2676                        "mac80211_hwsim: device_create failed (%ld)\n",
2677                        PTR_ERR(data->dev));
2678                 err = -ENOMEM;
2679                 goto failed_drvdata;
2680         }
2681         data->dev->driver = &mac80211_hwsim_driver.driver;
2682         err = device_bind_driver(data->dev);
2683         if (err != 0) {
2684                 pr_debug("mac80211_hwsim: device_bind_driver failed (%d)\n",
2685                        err);
2686                 goto failed_bind;
2687         }
2688
2689         skb_queue_head_init(&data->pending);
2690
2691         SET_IEEE80211_DEV(hw, data->dev);
2692         if (!param->perm_addr) {
2693                 eth_zero_addr(addr);
2694                 addr[0] = 0x02;
2695                 addr[3] = idx >> 8;
2696                 addr[4] = idx;
2697                 memcpy(data->addresses[0].addr, addr, ETH_ALEN);
2698                 /* Why need here second address ? */
2699                 memcpy(data->addresses[1].addr, addr, ETH_ALEN);
2700                 data->addresses[1].addr[0] |= 0x40;
2701                 hw->wiphy->n_addresses = 2;
2702                 hw->wiphy->addresses = data->addresses;
2703                 /* possible address clash is checked at hash table insertion */
2704         } else {
2705                 memcpy(data->addresses[0].addr, param->perm_addr, ETH_ALEN);
2706                 /* compatibility with automatically generated mac addr */
2707                 memcpy(data->addresses[1].addr, param->perm_addr, ETH_ALEN);
2708                 hw->wiphy->n_addresses = 2;
2709                 hw->wiphy->addresses = data->addresses;
2710         }
2711
2712         data->channels = param->channels;
2713         data->use_chanctx = param->use_chanctx;
2714         data->idx = idx;
2715         data->destroy_on_close = param->destroy_on_close;
2716         if (info)
2717                 data->portid = info->snd_portid;
2718
2719         /* setup interface limits, only on interface types we support */
2720         if (param->iftypes & BIT(NL80211_IFTYPE_ADHOC)) {
2721                 data->if_limits[n_limits].max = 1;
2722                 data->if_limits[n_limits].types = BIT(NL80211_IFTYPE_ADHOC);
2723                 n_limits++;
2724         }
2725
2726         if (param->iftypes & HWSIM_DEFAULT_IF_LIMIT) {
2727                 data->if_limits[n_limits].max = 2048;
2728                 /*
2729                  * For this case, we may only support a subset of
2730                  * HWSIM_DEFAULT_IF_LIMIT, therefore we only want to add the
2731                  * bits that both param->iftype & HWSIM_DEFAULT_IF_LIMIT have.
2732                  */
2733                 data->if_limits[n_limits].types =
2734                                         HWSIM_DEFAULT_IF_LIMIT & param->iftypes;
2735                 n_limits++;
2736         }
2737
2738         if (param->iftypes & BIT(NL80211_IFTYPE_P2P_DEVICE)) {
2739                 data->if_limits[n_limits].max = 1;
2740                 data->if_limits[n_limits].types =
2741                                                 BIT(NL80211_IFTYPE_P2P_DEVICE);
2742                 n_limits++;
2743         }
2744
2745         if (data->use_chanctx) {
2746                 hw->wiphy->max_scan_ssids = 255;
2747                 hw->wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
2748                 hw->wiphy->max_remain_on_channel_duration = 1000;
2749                 data->if_combination.radar_detect_widths = 0;
2750                 data->if_combination.num_different_channels = data->channels;
2751         } else {
2752                 data->if_combination.num_different_channels = 1;
2753                 data->if_combination.radar_detect_widths =
2754                                         BIT(NL80211_CHAN_WIDTH_20_NOHT) |
2755                                         BIT(NL80211_CHAN_WIDTH_20) |
2756                                         BIT(NL80211_CHAN_WIDTH_40) |
2757                                         BIT(NL80211_CHAN_WIDTH_80) |
2758                                         BIT(NL80211_CHAN_WIDTH_160);
2759         }
2760
2761         if (!n_limits) {
2762                 err = -EINVAL;
2763                 goto failed_hw;
2764         }
2765
2766         data->if_combination.max_interfaces = 0;
2767         for (i = 0; i < n_limits; i++)
2768                 data->if_combination.max_interfaces +=
2769                         data->if_limits[i].max;
2770
2771         data->if_combination.n_limits = n_limits;
2772         data->if_combination.limits = data->if_limits;
2773
2774         /*
2775          * If we actually were asked to support combinations,
2776          * advertise them - if there's only a single thing like
2777          * only IBSS then don't advertise it as combinations.
2778          */
2779         if (data->if_combination.max_interfaces > 1) {
2780                 hw->wiphy->iface_combinations = &data->if_combination;
2781                 hw->wiphy->n_iface_combinations = 1;
2782         }
2783
2784         if (param->ciphers) {
2785                 memcpy(data->ciphers, param->ciphers,
2786                        param->n_ciphers * sizeof(u32));
2787                 hw->wiphy->cipher_suites = data->ciphers;
2788                 hw->wiphy->n_cipher_suites = param->n_ciphers;
2789         }
2790
2791         INIT_DELAYED_WORK(&data->roc_start, hw_roc_start);
2792         INIT_DELAYED_WORK(&data->roc_done, hw_roc_done);
2793         INIT_DELAYED_WORK(&data->hw_scan, hw_scan_work);
2794
2795         hw->queues = 5;
2796         hw->offchannel_tx_hw_queue = 4;
2797
2798         ieee80211_hw_set(hw, SUPPORT_FAST_XMIT);
2799         ieee80211_hw_set(hw, CHANCTX_STA_CSA);
2800         ieee80211_hw_set(hw, SUPPORTS_HT_CCK_RATES);
2801         ieee80211_hw_set(hw, QUEUE_CONTROL);
2802         ieee80211_hw_set(hw, WANT_MONITOR_VIF);
2803         ieee80211_hw_set(hw, AMPDU_AGGREGATION);
2804         ieee80211_hw_set(hw, MFP_CAPABLE);
2805         ieee80211_hw_set(hw, SIGNAL_DBM);
2806         ieee80211_hw_set(hw, SUPPORTS_PS);
2807         ieee80211_hw_set(hw, TDLS_WIDER_BW);
2808
2809         /* We only have SW crypto and only implement the A-MPDU API
2810          * (but don't really build A-MPDUs) so can have extended key
2811          * support
2812          */
2813         ieee80211_hw_set(hw, EXT_KEY_ID_NATIVE);
2814         if (rctbl)
2815                 ieee80211_hw_set(hw, SUPPORTS_RC_TABLE);
2816         ieee80211_hw_set(hw, SUPPORTS_MULTI_BSSID);
2817
2818         hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS |
2819                             WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL |
2820                             WIPHY_FLAG_AP_UAPSD |
2821                             WIPHY_FLAG_HAS_CHANNEL_SWITCH;
2822         hw->wiphy->features |= NL80211_FEATURE_ACTIVE_MONITOR |
2823                                NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE |
2824                                NL80211_FEATURE_STATIC_SMPS |
2825                                NL80211_FEATURE_DYNAMIC_SMPS |
2826                                NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR;
2827         wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_VHT_IBSS);
2828
2829         hw->wiphy->interface_modes = param->iftypes;
2830
2831         /* ask mac80211 to reserve space for magic */
2832         hw->vif_data_size = sizeof(struct hwsim_vif_priv);
2833         hw->sta_data_size = sizeof(struct hwsim_sta_priv);
2834         hw->chanctx_data_size = sizeof(struct hwsim_chanctx_priv);
2835
2836         memcpy(data->channels_2ghz, hwsim_channels_2ghz,
2837                 sizeof(hwsim_channels_2ghz));
2838         memcpy(data->channels_5ghz, hwsim_channels_5ghz,
2839                 sizeof(hwsim_channels_5ghz));
2840         memcpy(data->rates, hwsim_rates, sizeof(hwsim_rates));
2841
2842         for (band = NL80211_BAND_2GHZ; band < NUM_NL80211_BANDS; band++) {
2843                 struct ieee80211_supported_band *sband = &data->bands[band];
2844
2845                 sband->band = band;
2846
2847                 switch (band) {
2848                 case NL80211_BAND_2GHZ:
2849                         sband->channels = data->channels_2ghz;
2850                         sband->n_channels = ARRAY_SIZE(hwsim_channels_2ghz);
2851                         sband->bitrates = data->rates;
2852                         sband->n_bitrates = ARRAY_SIZE(hwsim_rates);
2853                         break;
2854                 case NL80211_BAND_5GHZ:
2855                         sband->channels = data->channels_5ghz;
2856                         sband->n_channels = ARRAY_SIZE(hwsim_channels_5ghz);
2857                         sband->bitrates = data->rates + 4;
2858                         sband->n_bitrates = ARRAY_SIZE(hwsim_rates) - 4;
2859
2860                         sband->vht_cap.vht_supported = true;
2861                         sband->vht_cap.cap =
2862                                 IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454 |
2863                                 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ |
2864                                 IEEE80211_VHT_CAP_RXLDPC |
2865                                 IEEE80211_VHT_CAP_SHORT_GI_80 |
2866                                 IEEE80211_VHT_CAP_SHORT_GI_160 |
2867                                 IEEE80211_VHT_CAP_TXSTBC |
2868                                 IEEE80211_VHT_CAP_RXSTBC_4 |
2869                                 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
2870                         sband->vht_cap.vht_mcs.rx_mcs_map =
2871                                 cpu_to_le16(IEEE80211_VHT_MCS_SUPPORT_0_9 << 0 |
2872                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 2 |
2873                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 4 |
2874                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 6 |
2875                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 8 |
2876                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 10 |
2877                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 12 |
2878                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 14);
2879                         sband->vht_cap.vht_mcs.tx_mcs_map =
2880                                 sband->vht_cap.vht_mcs.rx_mcs_map;
2881                         break;
2882                 default:
2883                         continue;
2884                 }
2885
2886                 sband->ht_cap.ht_supported = true;
2887                 sband->ht_cap.cap = IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
2888                                     IEEE80211_HT_CAP_GRN_FLD |
2889                                     IEEE80211_HT_CAP_SGI_20 |
2890                                     IEEE80211_HT_CAP_SGI_40 |
2891                                     IEEE80211_HT_CAP_DSSSCCK40;
2892                 sband->ht_cap.ampdu_factor = 0x3;
2893                 sband->ht_cap.ampdu_density = 0x6;
2894                 memset(&sband->ht_cap.mcs, 0,
2895                        sizeof(sband->ht_cap.mcs));
2896                 sband->ht_cap.mcs.rx_mask[0] = 0xff;
2897                 sband->ht_cap.mcs.rx_mask[1] = 0xff;
2898                 sband->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
2899
2900                 mac80211_hswim_he_capab(sband);
2901
2902                 hw->wiphy->bands[band] = sband;
2903         }
2904
2905         /* By default all radios belong to the first group */
2906         data->group = 1;
2907         mutex_init(&data->mutex);
2908
2909         data->netgroup = hwsim_net_get_netgroup(net);
2910         data->wmediumd = hwsim_net_get_wmediumd(net);
2911
2912         /* Enable frame retransmissions for lossy channels */
2913         hw->max_rates = 4;
2914         hw->max_rate_tries = 11;
2915
2916         hw->wiphy->vendor_commands = mac80211_hwsim_vendor_commands;
2917         hw->wiphy->n_vendor_commands =
2918                 ARRAY_SIZE(mac80211_hwsim_vendor_commands);
2919         hw->wiphy->vendor_events = mac80211_hwsim_vendor_events;
2920         hw->wiphy->n_vendor_events = ARRAY_SIZE(mac80211_hwsim_vendor_events);
2921
2922         if (param->reg_strict)
2923                 hw->wiphy->regulatory_flags |= REGULATORY_STRICT_REG;
2924         if (param->regd) {
2925                 data->regd = param->regd;
2926                 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG;
2927                 wiphy_apply_custom_regulatory(hw->wiphy, param->regd);
2928                 /* give the regulatory workqueue a chance to run */
2929                 schedule_timeout_interruptible(1);
2930         }
2931
2932         if (param->no_vif)
2933                 ieee80211_hw_set(hw, NO_AUTO_VIF);
2934
2935         wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
2936
2937         hrtimer_init(&data->beacon_timer, CLOCK_MONOTONIC,
2938                      HRTIMER_MODE_ABS_SOFT);
2939         data->beacon_timer.function = mac80211_hwsim_beacon;
2940
2941         err = ieee80211_register_hw(hw);
2942         if (err < 0) {
2943                 pr_debug("mac80211_hwsim: ieee80211_register_hw failed (%d)\n",
2944                        err);
2945                 goto failed_hw;
2946         }
2947
2948         wiphy_dbg(hw->wiphy, "hwaddr %pM registered\n", hw->wiphy->perm_addr);
2949
2950         if (param->reg_alpha2) {
2951                 data->alpha2[0] = param->reg_alpha2[0];
2952                 data->alpha2[1] = param->reg_alpha2[1];
2953                 regulatory_hint(hw->wiphy, param->reg_alpha2);
2954         }
2955
2956         data->debugfs = debugfs_create_dir("hwsim", hw->wiphy->debugfsdir);
2957         debugfs_create_file("ps", 0666, data->debugfs, data, &hwsim_fops_ps);
2958         debugfs_create_file("group", 0666, data->debugfs, data,
2959                             &hwsim_fops_group);
2960         if (!data->use_chanctx)
2961                 debugfs_create_file("dfs_simulate_radar", 0222,
2962                                     data->debugfs,
2963                                     data, &hwsim_simulate_radar);
2964
2965         spin_lock_bh(&hwsim_radio_lock);
2966         err = rhashtable_insert_fast(&hwsim_radios_rht, &data->rht,
2967                                      hwsim_rht_params);
2968         if (err < 0) {
2969                 if (info) {
2970                         GENL_SET_ERR_MSG(info, "perm addr already present");
2971                         NL_SET_BAD_ATTR(info->extack,
2972                                         info->attrs[HWSIM_ATTR_PERM_ADDR]);
2973                 }
2974                 spin_unlock_bh(&hwsim_radio_lock);
2975                 goto failed_final_insert;
2976         }
2977
2978         list_add_tail(&data->list, &hwsim_radios);
2979         hwsim_radios_generation++;
2980         spin_unlock_bh(&hwsim_radio_lock);
2981
2982         hwsim_mcast_new_radio(idx, info, param);
2983
2984         return idx;
2985
2986 failed_final_insert:
2987         debugfs_remove_recursive(data->debugfs);
2988         ieee80211_unregister_hw(data->hw);
2989 failed_hw:
2990         device_release_driver(data->dev);
2991 failed_bind:
2992         device_unregister(data->dev);
2993 failed_drvdata:
2994         ieee80211_free_hw(hw);
2995 failed:
2996         return err;
2997 }
2998
2999 static void hwsim_mcast_del_radio(int id, const char *hwname,
3000                                   struct genl_info *info)
3001 {
3002         struct sk_buff *skb;
3003         void *data;
3004         int ret;
3005
3006         skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
3007         if (!skb)
3008                 return;
3009
3010         data = genlmsg_put(skb, 0, 0, &hwsim_genl_family, 0,
3011                            HWSIM_CMD_DEL_RADIO);
3012         if (!data)
3013                 goto error;
3014
3015         ret = nla_put_u32(skb, HWSIM_ATTR_RADIO_ID, id);
3016         if (ret < 0)
3017                 goto error;
3018
3019         ret = nla_put(skb, HWSIM_ATTR_RADIO_NAME, strlen(hwname),
3020                       hwname);
3021         if (ret < 0)
3022                 goto error;
3023
3024         genlmsg_end(skb, data);
3025
3026         hwsim_mcast_config_msg(skb, info);
3027
3028         return;
3029
3030 error:
3031         nlmsg_free(skb);
3032 }
3033
3034 static void mac80211_hwsim_del_radio(struct mac80211_hwsim_data *data,
3035                                      const char *hwname,
3036                                      struct genl_info *info)
3037 {
3038         hwsim_mcast_del_radio(data->idx, hwname, info);
3039         debugfs_remove_recursive(data->debugfs);
3040         ieee80211_unregister_hw(data->hw);
3041         device_release_driver(data->dev);
3042         device_unregister(data->dev);
3043         ieee80211_free_hw(data->hw);
3044 }
3045
3046 static int mac80211_hwsim_get_radio(struct sk_buff *skb,
3047                                     struct mac80211_hwsim_data *data,
3048                                     u32 portid, u32 seq,
3049                                     struct netlink_callback *cb, int flags)
3050 {
3051         void *hdr;
3052         struct hwsim_new_radio_params param = { };
3053         int res = -EMSGSIZE;
3054
3055         hdr = genlmsg_put(skb, portid, seq, &hwsim_genl_family, flags,
3056                           HWSIM_CMD_GET_RADIO);
3057         if (!hdr)
3058                 return -EMSGSIZE;
3059
3060         if (cb)
3061                 genl_dump_check_consistent(cb, hdr);
3062
3063         if (data->alpha2[0] && data->alpha2[1])
3064                 param.reg_alpha2 = data->alpha2;
3065
3066         param.reg_strict = !!(data->hw->wiphy->regulatory_flags &
3067                                         REGULATORY_STRICT_REG);
3068         param.p2p_device = !!(data->hw->wiphy->interface_modes &
3069                                         BIT(NL80211_IFTYPE_P2P_DEVICE));
3070         param.use_chanctx = data->use_chanctx;
3071         param.regd = data->regd;
3072         param.channels = data->channels;
3073         param.hwname = wiphy_name(data->hw->wiphy);
3074
3075         res = append_radio_msg(skb, data->idx, &param);
3076         if (res < 0)
3077                 goto out_err;
3078
3079         genlmsg_end(skb, hdr);
3080         return 0;
3081
3082 out_err:
3083         genlmsg_cancel(skb, hdr);
3084         return res;
3085 }
3086
3087 static void mac80211_hwsim_free(void)
3088 {
3089         struct mac80211_hwsim_data *data;
3090
3091         spin_lock_bh(&hwsim_radio_lock);
3092         while ((data = list_first_entry_or_null(&hwsim_radios,
3093                                                 struct mac80211_hwsim_data,
3094                                                 list))) {
3095                 list_del(&data->list);
3096                 spin_unlock_bh(&hwsim_radio_lock);
3097                 mac80211_hwsim_del_radio(data, wiphy_name(data->hw->wiphy),
3098                                          NULL);
3099                 spin_lock_bh(&hwsim_radio_lock);
3100         }
3101         spin_unlock_bh(&hwsim_radio_lock);
3102         class_destroy(hwsim_class);
3103 }
3104
3105 static const struct net_device_ops hwsim_netdev_ops = {
3106         .ndo_start_xmit         = hwsim_mon_xmit,
3107         .ndo_set_mac_address    = eth_mac_addr,
3108         .ndo_validate_addr      = eth_validate_addr,
3109 };
3110
3111 static void hwsim_mon_setup(struct net_device *dev)
3112 {
3113         dev->netdev_ops = &hwsim_netdev_ops;
3114         dev->needs_free_netdev = true;
3115         ether_setup(dev);
3116         dev->priv_flags |= IFF_NO_QUEUE;
3117         dev->type = ARPHRD_IEEE80211_RADIOTAP;
3118         eth_zero_addr(dev->dev_addr);
3119         dev->dev_addr[0] = 0x12;
3120 }
3121
3122 static struct mac80211_hwsim_data *get_hwsim_data_ref_from_addr(const u8 *addr)
3123 {
3124         return rhashtable_lookup_fast(&hwsim_radios_rht,
3125                                       addr,
3126                                       hwsim_rht_params);
3127 }
3128
3129 static void hwsim_register_wmediumd(struct net *net, u32 portid)
3130 {
3131         struct mac80211_hwsim_data *data;
3132
3133         hwsim_net_set_wmediumd(net, portid);
3134
3135         spin_lock_bh(&hwsim_radio_lock);
3136         list_for_each_entry(data, &hwsim_radios, list) {
3137                 if (data->netgroup == hwsim_net_get_netgroup(net))
3138                         data->wmediumd = portid;
3139         }
3140         spin_unlock_bh(&hwsim_radio_lock);
3141 }
3142
3143 static int hwsim_tx_info_frame_received_nl(struct sk_buff *skb_2,
3144                                            struct genl_info *info)
3145 {
3146
3147         struct ieee80211_hdr *hdr;
3148         struct mac80211_hwsim_data *data2;
3149         struct ieee80211_tx_info *txi;
3150         struct hwsim_tx_rate *tx_attempts;
3151         u64 ret_skb_cookie;
3152         struct sk_buff *skb, *tmp;
3153         const u8 *src;
3154         unsigned int hwsim_flags;
3155         int i;
3156         bool found = false;
3157
3158         if (!info->attrs[HWSIM_ATTR_ADDR_TRANSMITTER] ||
3159             !info->attrs[HWSIM_ATTR_FLAGS] ||
3160             !info->attrs[HWSIM_ATTR_COOKIE] ||
3161             !info->attrs[HWSIM_ATTR_SIGNAL] ||
3162             !info->attrs[HWSIM_ATTR_TX_INFO])
3163                 goto out;
3164
3165         src = (void *)nla_data(info->attrs[HWSIM_ATTR_ADDR_TRANSMITTER]);
3166         hwsim_flags = nla_get_u32(info->attrs[HWSIM_ATTR_FLAGS]);
3167         ret_skb_cookie = nla_get_u64(info->attrs[HWSIM_ATTR_COOKIE]);
3168
3169         data2 = get_hwsim_data_ref_from_addr(src);
3170         if (!data2)
3171                 goto out;
3172
3173         if (hwsim_net_get_netgroup(genl_info_net(info)) != data2->netgroup)
3174                 goto out;
3175
3176         if (info->snd_portid != data2->wmediumd)
3177                 goto out;
3178
3179         /* look for the skb matching the cookie passed back from user */
3180         skb_queue_walk_safe(&data2->pending, skb, tmp) {
3181                 u64 skb_cookie;
3182
3183                 txi = IEEE80211_SKB_CB(skb);
3184                 skb_cookie = (u64)(uintptr_t)txi->rate_driver_data[0];
3185
3186                 if (skb_cookie == ret_skb_cookie) {
3187                         skb_unlink(skb, &data2->pending);
3188                         found = true;
3189                         break;
3190                 }
3191         }
3192
3193         /* not found */
3194         if (!found)
3195                 goto out;
3196
3197         /* Tx info received because the frame was broadcasted on user space,
3198          so we get all the necessary info: tx attempts and skb control buff */
3199
3200         tx_attempts = (struct hwsim_tx_rate *)nla_data(
3201                        info->attrs[HWSIM_ATTR_TX_INFO]);
3202
3203         /* now send back TX status */
3204         txi = IEEE80211_SKB_CB(skb);
3205
3206         ieee80211_tx_info_clear_status(txi);
3207
3208         for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
3209                 txi->status.rates[i].idx = tx_attempts[i].idx;
3210                 txi->status.rates[i].count = tx_attempts[i].count;
3211         }
3212
3213         txi->status.ack_signal = nla_get_u32(info->attrs[HWSIM_ATTR_SIGNAL]);
3214
3215         if (!(hwsim_flags & HWSIM_TX_CTL_NO_ACK) &&
3216            (hwsim_flags & HWSIM_TX_STAT_ACK)) {
3217                 if (skb->len >= 16) {
3218                         hdr = (struct ieee80211_hdr *) skb->data;
3219                         mac80211_hwsim_monitor_ack(data2->channel,
3220                                                    hdr->addr2);
3221                 }
3222                 txi->flags |= IEEE80211_TX_STAT_ACK;
3223         }
3224         ieee80211_tx_status_irqsafe(data2->hw, skb);
3225         return 0;
3226 out:
3227         return -EINVAL;
3228
3229 }
3230
3231 static int hwsim_cloned_frame_received_nl(struct sk_buff *skb_2,
3232                                           struct genl_info *info)
3233 {
3234         struct mac80211_hwsim_data *data2;
3235         struct ieee80211_rx_status rx_status;
3236         const u8 *dst;
3237         int frame_data_len;
3238         void *frame_data;
3239         struct sk_buff *skb = NULL;
3240
3241         if (!info->attrs[HWSIM_ATTR_ADDR_RECEIVER] ||
3242             !info->attrs[HWSIM_ATTR_FRAME] ||
3243             !info->attrs[HWSIM_ATTR_RX_RATE] ||
3244             !info->attrs[HWSIM_ATTR_SIGNAL])
3245                 goto out;
3246
3247         dst = (void *)nla_data(info->attrs[HWSIM_ATTR_ADDR_RECEIVER]);
3248         frame_data_len = nla_len(info->attrs[HWSIM_ATTR_FRAME]);
3249         frame_data = (void *)nla_data(info->attrs[HWSIM_ATTR_FRAME]);
3250
3251         /* Allocate new skb here */
3252         skb = alloc_skb(frame_data_len, GFP_KERNEL);
3253         if (skb == NULL)
3254                 goto err;
3255
3256         if (frame_data_len > IEEE80211_MAX_DATA_LEN)
3257                 goto err;
3258
3259         /* Copy the data */
3260         skb_put_data(skb, frame_data, frame_data_len);
3261
3262         data2 = get_hwsim_data_ref_from_addr(dst);
3263         if (!data2)
3264                 goto out;
3265
3266         if (hwsim_net_get_netgroup(genl_info_net(info)) != data2->netgroup)
3267                 goto out;
3268
3269         if (info->snd_portid != data2->wmediumd)
3270                 goto out;
3271
3272         /* check if radio is configured properly */
3273
3274         if (data2->idle || !data2->started)
3275                 goto out;
3276
3277         /* A frame is received from user space */
3278         memset(&rx_status, 0, sizeof(rx_status));
3279         if (info->attrs[HWSIM_ATTR_FREQ]) {
3280                 /* throw away off-channel packets, but allow both the temporary
3281                  * ("hw" scan/remain-on-channel) and regular channel, since the
3282                  * internal datapath also allows this
3283                  */
3284                 mutex_lock(&data2->mutex);
3285                 rx_status.freq = nla_get_u32(info->attrs[HWSIM_ATTR_FREQ]);
3286
3287                 if (rx_status.freq != data2->channel->center_freq &&
3288                     (!data2->tmp_chan ||
3289                      rx_status.freq != data2->tmp_chan->center_freq)) {
3290                         mutex_unlock(&data2->mutex);
3291                         goto out;
3292                 }
3293                 mutex_unlock(&data2->mutex);
3294         } else {
3295                 rx_status.freq = data2->channel->center_freq;
3296         }
3297
3298         rx_status.band = data2->channel->band;
3299         rx_status.rate_idx = nla_get_u32(info->attrs[HWSIM_ATTR_RX_RATE]);
3300         rx_status.signal = nla_get_u32(info->attrs[HWSIM_ATTR_SIGNAL]);
3301
3302         memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
3303         data2->rx_pkts++;
3304         data2->rx_bytes += skb->len;
3305         ieee80211_rx_irqsafe(data2->hw, skb);
3306
3307         return 0;
3308 err:
3309         pr_debug("mac80211_hwsim: error occurred in %s\n", __func__);
3310 out:
3311         dev_kfree_skb(skb);
3312         return -EINVAL;
3313 }
3314
3315 static int hwsim_register_received_nl(struct sk_buff *skb_2,
3316                                       struct genl_info *info)
3317 {
3318         struct net *net = genl_info_net(info);
3319         struct mac80211_hwsim_data *data;
3320         int chans = 1;
3321
3322         spin_lock_bh(&hwsim_radio_lock);
3323         list_for_each_entry(data, &hwsim_radios, list)
3324                 chans = max(chans, data->channels);
3325         spin_unlock_bh(&hwsim_radio_lock);
3326
3327         /* In the future we should revise the userspace API and allow it
3328          * to set a flag that it does support multi-channel, then we can
3329          * let this pass conditionally on the flag.
3330          * For current userspace, prohibit it since it won't work right.
3331          */
3332         if (chans > 1)
3333                 return -EOPNOTSUPP;
3334
3335         if (hwsim_net_get_wmediumd(net))
3336                 return -EBUSY;
3337
3338         hwsim_register_wmediumd(net, info->snd_portid);
3339
3340         pr_debug("mac80211_hwsim: received a REGISTER, "
3341                "switching to wmediumd mode with pid %d\n", info->snd_portid);
3342
3343         return 0;
3344 }
3345
3346 /* ensures ciphers only include ciphers listed in 'hwsim_ciphers' array */
3347 static bool hwsim_known_ciphers(const u32 *ciphers, int n_ciphers)
3348 {
3349         int i;
3350
3351         for (i = 0; i < n_ciphers; i++) {
3352                 int j;
3353                 int found = 0;
3354
3355                 for (j = 0; j < ARRAY_SIZE(hwsim_ciphers); j++) {
3356                         if (ciphers[i] == hwsim_ciphers[j]) {
3357                                 found = 1;
3358                                 break;
3359                         }
3360                 }
3361
3362                 if (!found)
3363                         return false;
3364         }
3365
3366         return true;
3367 }
3368
3369 static int hwsim_new_radio_nl(struct sk_buff *msg, struct genl_info *info)
3370 {
3371         struct hwsim_new_radio_params param = { 0 };
3372         const char *hwname = NULL;
3373         int ret;
3374
3375         param.reg_strict = info->attrs[HWSIM_ATTR_REG_STRICT_REG];
3376         param.p2p_device = info->attrs[HWSIM_ATTR_SUPPORT_P2P_DEVICE];
3377         param.channels = channels;
3378         param.destroy_on_close =
3379                 info->attrs[HWSIM_ATTR_DESTROY_RADIO_ON_CLOSE];
3380
3381         if (info->attrs[HWSIM_ATTR_CHANNELS])
3382                 param.channels = nla_get_u32(info->attrs[HWSIM_ATTR_CHANNELS]);
3383
3384         if (param.channels < 1) {
3385                 GENL_SET_ERR_MSG(info, "must have at least one channel");
3386                 return -EINVAL;
3387         }
3388
3389         if (param.channels > CFG80211_MAX_NUM_DIFFERENT_CHANNELS) {
3390                 GENL_SET_ERR_MSG(info, "too many channels specified");
3391                 return -EINVAL;
3392         }
3393
3394         if (info->attrs[HWSIM_ATTR_NO_VIF])
3395                 param.no_vif = true;
3396
3397         if (info->attrs[HWSIM_ATTR_USE_CHANCTX])
3398                 param.use_chanctx = true;
3399         else
3400                 param.use_chanctx = (param.channels > 1);
3401
3402         if (info->attrs[HWSIM_ATTR_REG_HINT_ALPHA2])
3403                 param.reg_alpha2 =
3404                         nla_data(info->attrs[HWSIM_ATTR_REG_HINT_ALPHA2]);
3405
3406         if (info->attrs[HWSIM_ATTR_REG_CUSTOM_REG]) {
3407                 u32 idx = nla_get_u32(info->attrs[HWSIM_ATTR_REG_CUSTOM_REG]);
3408
3409                 if (idx >= ARRAY_SIZE(hwsim_world_regdom_custom))
3410                         return -EINVAL;
3411
3412                 idx = array_index_nospec(idx,
3413                                          ARRAY_SIZE(hwsim_world_regdom_custom));
3414                 param.regd = hwsim_world_regdom_custom[idx];
3415         }
3416
3417         if (info->attrs[HWSIM_ATTR_PERM_ADDR]) {
3418                 if (!is_valid_ether_addr(
3419                                 nla_data(info->attrs[HWSIM_ATTR_PERM_ADDR]))) {
3420                         GENL_SET_ERR_MSG(info,"MAC is no valid source addr");
3421                         NL_SET_BAD_ATTR(info->extack,
3422                                         info->attrs[HWSIM_ATTR_PERM_ADDR]);
3423                         return -EINVAL;
3424                 }
3425
3426                 param.perm_addr = nla_data(info->attrs[HWSIM_ATTR_PERM_ADDR]);
3427         }
3428
3429         if (info->attrs[HWSIM_ATTR_IFTYPE_SUPPORT]) {
3430                 param.iftypes =
3431                         nla_get_u32(info->attrs[HWSIM_ATTR_IFTYPE_SUPPORT]);
3432
3433                 if (param.iftypes & ~HWSIM_IFTYPE_SUPPORT_MASK) {
3434                         NL_SET_ERR_MSG_ATTR(info->extack,
3435                                             info->attrs[HWSIM_ATTR_IFTYPE_SUPPORT],
3436                                             "cannot support more iftypes than kernel");
3437                         return -EINVAL;
3438                 }
3439         } else {
3440                 param.iftypes = HWSIM_IFTYPE_SUPPORT_MASK;
3441         }
3442
3443         /* ensure both flag and iftype support is honored */
3444         if (param.p2p_device ||
3445             param.iftypes & BIT(NL80211_IFTYPE_P2P_DEVICE)) {
3446                 param.iftypes |= BIT(NL80211_IFTYPE_P2P_DEVICE);
3447                 param.p2p_device = true;
3448         }
3449
3450         if (info->attrs[HWSIM_ATTR_CIPHER_SUPPORT]) {
3451                 u32 len = nla_len(info->attrs[HWSIM_ATTR_CIPHER_SUPPORT]);
3452
3453                 param.ciphers =
3454                         nla_data(info->attrs[HWSIM_ATTR_CIPHER_SUPPORT]);
3455
3456                 if (len % sizeof(u32)) {
3457                         NL_SET_ERR_MSG_ATTR(info->extack,
3458                                             info->attrs[HWSIM_ATTR_CIPHER_SUPPORT],
3459                                             "bad cipher list length");
3460                         return -EINVAL;
3461                 }
3462
3463                 param.n_ciphers = len / sizeof(u32);
3464
3465                 if (param.n_ciphers > ARRAY_SIZE(hwsim_ciphers)) {
3466                         NL_SET_ERR_MSG_ATTR(info->extack,
3467                                             info->attrs[HWSIM_ATTR_CIPHER_SUPPORT],
3468                                             "too many ciphers specified");
3469                         return -EINVAL;
3470                 }
3471
3472                 if (!hwsim_known_ciphers(param.ciphers, param.n_ciphers)) {
3473                         NL_SET_ERR_MSG_ATTR(info->extack,
3474                                             info->attrs[HWSIM_ATTR_CIPHER_SUPPORT],
3475                                             "unsupported ciphers specified");
3476                         return -EINVAL;
3477                 }
3478         }
3479
3480         if (info->attrs[HWSIM_ATTR_RADIO_NAME]) {
3481                 hwname = kasprintf(GFP_KERNEL, "%.*s",
3482                                    nla_len(info->attrs[HWSIM_ATTR_RADIO_NAME]),
3483                                    (char *)nla_data(info->attrs[HWSIM_ATTR_RADIO_NAME]));
3484                 if (!hwname)
3485                         return -ENOMEM;
3486                 param.hwname = hwname;
3487         }
3488
3489         ret = mac80211_hwsim_new_radio(info, &param);
3490         kfree(hwname);
3491         return ret;
3492 }
3493
3494 static int hwsim_del_radio_nl(struct sk_buff *msg, struct genl_info *info)
3495 {
3496         struct mac80211_hwsim_data *data;
3497         s64 idx = -1;
3498         const char *hwname = NULL;
3499
3500         if (info->attrs[HWSIM_ATTR_RADIO_ID]) {
3501                 idx = nla_get_u32(info->attrs[HWSIM_ATTR_RADIO_ID]);
3502         } else if (info->attrs[HWSIM_ATTR_RADIO_NAME]) {
3503                 hwname = kasprintf(GFP_KERNEL, "%.*s",
3504                                    nla_len(info->attrs[HWSIM_ATTR_RADIO_NAME]),
3505                                    (char *)nla_data(info->attrs[HWSIM_ATTR_RADIO_NAME]));
3506                 if (!hwname)
3507                         return -ENOMEM;
3508         } else
3509                 return -EINVAL;
3510
3511         spin_lock_bh(&hwsim_radio_lock);
3512         list_for_each_entry(data, &hwsim_radios, list) {
3513                 if (idx >= 0) {
3514                         if (data->idx != idx)
3515                                 continue;
3516                 } else {
3517                         if (!hwname ||
3518                             strcmp(hwname, wiphy_name(data->hw->wiphy)))
3519                                 continue;
3520                 }
3521
3522                 if (!net_eq(wiphy_net(data->hw->wiphy), genl_info_net(info)))
3523                         continue;
3524
3525                 list_del(&data->list);
3526                 rhashtable_remove_fast(&hwsim_radios_rht, &data->rht,
3527                                        hwsim_rht_params);
3528                 hwsim_radios_generation++;
3529                 spin_unlock_bh(&hwsim_radio_lock);
3530                 mac80211_hwsim_del_radio(data, wiphy_name(data->hw->wiphy),
3531                                          info);
3532                 kfree(hwname);
3533                 return 0;
3534         }
3535         spin_unlock_bh(&hwsim_radio_lock);
3536
3537         kfree(hwname);
3538         return -ENODEV;
3539 }
3540
3541 static int hwsim_get_radio_nl(struct sk_buff *msg, struct genl_info *info)
3542 {
3543         struct mac80211_hwsim_data *data;
3544         struct sk_buff *skb;
3545         int idx, res = -ENODEV;
3546
3547         if (!info->attrs[HWSIM_ATTR_RADIO_ID])
3548                 return -EINVAL;
3549         idx = nla_get_u32(info->attrs[HWSIM_ATTR_RADIO_ID]);
3550
3551         spin_lock_bh(&hwsim_radio_lock);
3552         list_for_each_entry(data, &hwsim_radios, list) {
3553                 if (data->idx != idx)
3554                         continue;
3555
3556                 if (!net_eq(wiphy_net(data->hw->wiphy), genl_info_net(info)))
3557                         continue;
3558
3559                 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
3560                 if (!skb) {
3561                         res = -ENOMEM;
3562                         goto out_err;
3563                 }
3564
3565                 res = mac80211_hwsim_get_radio(skb, data, info->snd_portid,
3566                                                info->snd_seq, NULL, 0);
3567                 if (res < 0) {
3568                         nlmsg_free(skb);
3569                         goto out_err;
3570                 }
3571
3572                 res = genlmsg_reply(skb, info);
3573                 break;
3574         }
3575
3576 out_err:
3577         spin_unlock_bh(&hwsim_radio_lock);
3578
3579         return res;
3580 }
3581
3582 static int hwsim_dump_radio_nl(struct sk_buff *skb,
3583                                struct netlink_callback *cb)
3584 {
3585         int last_idx = cb->args[0] - 1;
3586         struct mac80211_hwsim_data *data = NULL;
3587         int res = 0;
3588         void *hdr;
3589
3590         spin_lock_bh(&hwsim_radio_lock);
3591         cb->seq = hwsim_radios_generation;
3592
3593         if (last_idx >= hwsim_radio_idx-1)
3594                 goto done;
3595
3596         list_for_each_entry(data, &hwsim_radios, list) {
3597                 if (data->idx <= last_idx)
3598                         continue;
3599
3600                 if (!net_eq(wiphy_net(data->hw->wiphy), sock_net(skb->sk)))
3601                         continue;
3602
3603                 res = mac80211_hwsim_get_radio(skb, data,
3604                                                NETLINK_CB(cb->skb).portid,
3605                                                cb->nlh->nlmsg_seq, cb,
3606                                                NLM_F_MULTI);
3607                 if (res < 0)
3608                         break;
3609
3610                 last_idx = data->idx;
3611         }
3612
3613         cb->args[0] = last_idx + 1;
3614
3615         /* list changed, but no new element sent, set interrupted flag */
3616         if (skb->len == 0 && cb->prev_seq && cb->seq != cb->prev_seq) {
3617                 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid,
3618                                   cb->nlh->nlmsg_seq, &hwsim_genl_family,
3619                                   NLM_F_MULTI, HWSIM_CMD_GET_RADIO);
3620                 if (hdr) {
3621                         genl_dump_check_consistent(cb, hdr);
3622                         genlmsg_end(skb, hdr);
3623                 } else {
3624                         res = -EMSGSIZE;
3625                 }
3626         }
3627
3628 done:
3629         spin_unlock_bh(&hwsim_radio_lock);
3630         return res ?: skb->len;
3631 }
3632
3633 /* Generic Netlink operations array */
3634 static const struct genl_ops hwsim_ops[] = {
3635         {
3636                 .cmd = HWSIM_CMD_REGISTER,
3637                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3638                 .doit = hwsim_register_received_nl,
3639                 .flags = GENL_UNS_ADMIN_PERM,
3640         },
3641         {
3642                 .cmd = HWSIM_CMD_FRAME,
3643                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3644                 .doit = hwsim_cloned_frame_received_nl,
3645         },
3646         {
3647                 .cmd = HWSIM_CMD_TX_INFO_FRAME,
3648                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3649                 .doit = hwsim_tx_info_frame_received_nl,
3650         },
3651         {
3652                 .cmd = HWSIM_CMD_NEW_RADIO,
3653                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3654                 .doit = hwsim_new_radio_nl,
3655                 .flags = GENL_UNS_ADMIN_PERM,
3656         },
3657         {
3658                 .cmd = HWSIM_CMD_DEL_RADIO,
3659                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3660                 .doit = hwsim_del_radio_nl,
3661                 .flags = GENL_UNS_ADMIN_PERM,
3662         },
3663         {
3664                 .cmd = HWSIM_CMD_GET_RADIO,
3665                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3666                 .doit = hwsim_get_radio_nl,
3667                 .dumpit = hwsim_dump_radio_nl,
3668         },
3669 };
3670
3671 static struct genl_family hwsim_genl_family __ro_after_init = {
3672         .name = "MAC80211_HWSIM",
3673         .version = 1,
3674         .maxattr = HWSIM_ATTR_MAX,
3675         .policy = hwsim_genl_policy,
3676         .netnsok = true,
3677         .module = THIS_MODULE,
3678         .ops = hwsim_ops,
3679         .n_ops = ARRAY_SIZE(hwsim_ops),
3680         .mcgrps = hwsim_mcgrps,
3681         .n_mcgrps = ARRAY_SIZE(hwsim_mcgrps),
3682 };
3683
3684 static void remove_user_radios(u32 portid)
3685 {
3686         struct mac80211_hwsim_data *entry, *tmp;
3687         LIST_HEAD(list);
3688
3689         spin_lock_bh(&hwsim_radio_lock);
3690         list_for_each_entry_safe(entry, tmp, &hwsim_radios, list) {
3691                 if (entry->destroy_on_close && entry->portid == portid) {
3692                         list_move(&entry->list, &list);
3693                         rhashtable_remove_fast(&hwsim_radios_rht, &entry->rht,
3694                                                hwsim_rht_params);
3695                         hwsim_radios_generation++;
3696                 }
3697         }
3698         spin_unlock_bh(&hwsim_radio_lock);
3699
3700         list_for_each_entry_safe(entry, tmp, &list, list) {
3701                 list_del(&entry->list);
3702                 mac80211_hwsim_del_radio(entry, wiphy_name(entry->hw->wiphy),
3703                                          NULL);
3704         }
3705 }
3706
3707 static int mac80211_hwsim_netlink_notify(struct notifier_block *nb,
3708                                          unsigned long state,
3709                                          void *_notify)
3710 {
3711         struct netlink_notify *notify = _notify;
3712
3713         if (state != NETLINK_URELEASE)
3714                 return NOTIFY_DONE;
3715
3716         remove_user_radios(notify->portid);
3717
3718         if (notify->portid == hwsim_net_get_wmediumd(notify->net)) {
3719                 printk(KERN_INFO "mac80211_hwsim: wmediumd released netlink"
3720                        " socket, switching to perfect channel medium\n");
3721                 hwsim_register_wmediumd(notify->net, 0);
3722         }
3723         return NOTIFY_DONE;
3724
3725 }
3726
3727 static struct notifier_block hwsim_netlink_notifier = {
3728         .notifier_call = mac80211_hwsim_netlink_notify,
3729 };
3730
3731 static int __init hwsim_init_netlink(void)
3732 {
3733         int rc;
3734
3735         printk(KERN_INFO "mac80211_hwsim: initializing netlink\n");
3736
3737         rc = genl_register_family(&hwsim_genl_family);
3738         if (rc)
3739                 goto failure;
3740
3741         rc = netlink_register_notifier(&hwsim_netlink_notifier);
3742         if (rc) {
3743                 genl_unregister_family(&hwsim_genl_family);
3744                 goto failure;
3745         }
3746
3747         return 0;
3748
3749 failure:
3750         pr_debug("mac80211_hwsim: error occurred in %s\n", __func__);
3751         return -EINVAL;
3752 }
3753
3754 static __net_init int hwsim_init_net(struct net *net)
3755 {
3756         return hwsim_net_set_netgroup(net);
3757 }
3758
3759 static void __net_exit hwsim_exit_net(struct net *net)
3760 {
3761         struct mac80211_hwsim_data *data, *tmp;
3762         LIST_HEAD(list);
3763
3764         spin_lock_bh(&hwsim_radio_lock);
3765         list_for_each_entry_safe(data, tmp, &hwsim_radios, list) {
3766                 if (!net_eq(wiphy_net(data->hw->wiphy), net))
3767                         continue;
3768
3769                 /* Radios created in init_net are returned to init_net. */
3770                 if (data->netgroup == hwsim_net_get_netgroup(&init_net))
3771                         continue;
3772
3773                 list_move(&data->list, &list);
3774                 rhashtable_remove_fast(&hwsim_radios_rht, &data->rht,
3775                                        hwsim_rht_params);
3776                 hwsim_radios_generation++;
3777         }
3778         spin_unlock_bh(&hwsim_radio_lock);
3779
3780         list_for_each_entry_safe(data, tmp, &list, list) {
3781                 list_del(&data->list);
3782                 mac80211_hwsim_del_radio(data,
3783                                          wiphy_name(data->hw->wiphy),
3784                                          NULL);
3785         }
3786
3787         ida_simple_remove(&hwsim_netgroup_ida, hwsim_net_get_netgroup(net));
3788 }
3789
3790 static struct pernet_operations hwsim_net_ops = {
3791         .init = hwsim_init_net,
3792         .exit = hwsim_exit_net,
3793         .id   = &hwsim_net_id,
3794         .size = sizeof(struct hwsim_net),
3795 };
3796
3797 static void hwsim_exit_netlink(void)
3798 {
3799         /* unregister the notifier */
3800         netlink_unregister_notifier(&hwsim_netlink_notifier);
3801         /* unregister the family */
3802         genl_unregister_family(&hwsim_genl_family);
3803 }
3804
3805 static int __init init_mac80211_hwsim(void)
3806 {
3807         int i, err;
3808
3809         if (radios < 0 || radios > 100)
3810                 return -EINVAL;
3811
3812         if (channels < 1)
3813                 return -EINVAL;
3814
3815         spin_lock_init(&hwsim_radio_lock);
3816
3817         err = rhashtable_init(&hwsim_radios_rht, &hwsim_rht_params);
3818         if (err)
3819                 return err;
3820
3821         err = register_pernet_device(&hwsim_net_ops);
3822         if (err)
3823                 goto out_free_rht;
3824
3825         err = platform_driver_register(&mac80211_hwsim_driver);
3826         if (err)
3827                 goto out_unregister_pernet;
3828
3829         err = hwsim_init_netlink();
3830         if (err)
3831                 goto out_unregister_driver;
3832
3833         hwsim_class = class_create(THIS_MODULE, "mac80211_hwsim");
3834         if (IS_ERR(hwsim_class)) {
3835                 err = PTR_ERR(hwsim_class);
3836                 goto out_exit_netlink;
3837         }
3838
3839         for (i = 0; i < radios; i++) {
3840                 struct hwsim_new_radio_params param = { 0 };
3841
3842                 param.channels = channels;
3843
3844                 switch (regtest) {
3845                 case HWSIM_REGTEST_DIFF_COUNTRY:
3846                         if (i < ARRAY_SIZE(hwsim_alpha2s))
3847                                 param.reg_alpha2 = hwsim_alpha2s[i];
3848                         break;
3849                 case HWSIM_REGTEST_DRIVER_REG_FOLLOW:
3850                         if (!i)
3851                                 param.reg_alpha2 = hwsim_alpha2s[0];
3852                         break;
3853                 case HWSIM_REGTEST_STRICT_ALL:
3854                         param.reg_strict = true;
3855                         /* fall through */
3856                 case HWSIM_REGTEST_DRIVER_REG_ALL:
3857                         param.reg_alpha2 = hwsim_alpha2s[0];
3858                         break;
3859                 case HWSIM_REGTEST_WORLD_ROAM:
3860                         if (i == 0)
3861                                 param.regd = &hwsim_world_regdom_custom_01;
3862                         break;
3863                 case HWSIM_REGTEST_CUSTOM_WORLD:
3864                         param.regd = &hwsim_world_regdom_custom_01;
3865                         break;
3866                 case HWSIM_REGTEST_CUSTOM_WORLD_2:
3867                         if (i == 0)
3868                                 param.regd = &hwsim_world_regdom_custom_01;
3869                         else if (i == 1)
3870                                 param.regd = &hwsim_world_regdom_custom_02;
3871                         break;
3872                 case HWSIM_REGTEST_STRICT_FOLLOW:
3873                         if (i == 0) {
3874                                 param.reg_strict = true;
3875                                 param.reg_alpha2 = hwsim_alpha2s[0];
3876                         }
3877                         break;
3878                 case HWSIM_REGTEST_STRICT_AND_DRIVER_REG:
3879                         if (i == 0) {
3880                                 param.reg_strict = true;
3881                                 param.reg_alpha2 = hwsim_alpha2s[0];
3882                         } else if (i == 1) {
3883                                 param.reg_alpha2 = hwsim_alpha2s[1];
3884                         }
3885                         break;
3886                 case HWSIM_REGTEST_ALL:
3887                         switch (i) {
3888                         case 0:
3889                                 param.regd = &hwsim_world_regdom_custom_01;
3890                                 break;
3891                         case 1:
3892                                 param.regd = &hwsim_world_regdom_custom_02;
3893                                 break;
3894                         case 2:
3895                                 param.reg_alpha2 = hwsim_alpha2s[0];
3896                                 break;
3897                         case 3:
3898                                 param.reg_alpha2 = hwsim_alpha2s[1];
3899                                 break;
3900                         case 4:
3901                                 param.reg_strict = true;
3902                                 param.reg_alpha2 = hwsim_alpha2s[2];
3903                                 break;
3904                         }
3905                         break;
3906                 default:
3907                         break;
3908                 }
3909
3910                 param.p2p_device = support_p2p_device;
3911                 param.use_chanctx = channels > 1;
3912                 param.iftypes = HWSIM_IFTYPE_SUPPORT_MASK;
3913                 if (param.p2p_device)
3914                         param.iftypes |= BIT(NL80211_IFTYPE_P2P_DEVICE);
3915
3916                 err = mac80211_hwsim_new_radio(NULL, &param);
3917                 if (err < 0)
3918                         goto out_free_radios;
3919         }
3920
3921         hwsim_mon = alloc_netdev(0, "hwsim%d", NET_NAME_UNKNOWN,
3922                                  hwsim_mon_setup);
3923         if (hwsim_mon == NULL) {
3924                 err = -ENOMEM;
3925                 goto out_free_radios;
3926         }
3927
3928         rtnl_lock();
3929         err = dev_alloc_name(hwsim_mon, hwsim_mon->name);
3930         if (err < 0) {
3931                 rtnl_unlock();
3932                 goto out_free_radios;
3933         }
3934
3935         err = register_netdevice(hwsim_mon);
3936         if (err < 0) {
3937                 rtnl_unlock();
3938                 goto out_free_mon;
3939         }
3940         rtnl_unlock();
3941
3942         return 0;
3943
3944 out_free_mon:
3945         free_netdev(hwsim_mon);
3946 out_free_radios:
3947         mac80211_hwsim_free();
3948 out_exit_netlink:
3949         hwsim_exit_netlink();
3950 out_unregister_driver:
3951         platform_driver_unregister(&mac80211_hwsim_driver);
3952 out_unregister_pernet:
3953         unregister_pernet_device(&hwsim_net_ops);
3954 out_free_rht:
3955         rhashtable_destroy(&hwsim_radios_rht);
3956         return err;
3957 }
3958 module_init(init_mac80211_hwsim);
3959
3960 static void __exit exit_mac80211_hwsim(void)
3961 {
3962         pr_debug("mac80211_hwsim: unregister radios\n");
3963
3964         hwsim_exit_netlink();
3965
3966         mac80211_hwsim_free();
3967
3968         rhashtable_destroy(&hwsim_radios_rht);
3969         unregister_netdev(hwsim_mon);
3970         platform_driver_unregister(&mac80211_hwsim_driver);
3971         unregister_pernet_device(&hwsim_net_ops);
3972 }
3973 module_exit(exit_mac80211_hwsim);