drivers/net/wireless/mac80211_hwsim.c

   1 /*
   2  * mac80211_hwsim - software simulator of 802.11 radio(s) for mac80211
   3  * Copyright (c) 2008, Jouni Malinen <j@w1.fi>
   4  * Copyright (c) 2011, Javier Lopez <jlopex@gmail.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 /*
  12  * TODO:
  13  * - Add TSF sync and fix IBSS beacon transmission by adding
  14  *   competition for "air time" at TBTT
  15  * - RX filtering based on filter configuration (data->rx_filter)
  16  */
  17
  18 #include <linux/list.h>
  19 #include <linux/slab.h>
  20 #include <linux/spinlock.h>
  21 #include <net/dst.h>
  22 #include <net/xfrm.h>
  23 #include <net/mac80211.h>
  24 #include <net/ieee80211_radiotap.h>
  25 #include <linux/if_arp.h>
  26 #include <linux/rtnetlink.h>
  27 #include <linux/etherdevice.h>
  28 #include <linux/platform_device.h>
  29 #include <linux/debugfs.h>
  30 #include <linux/module.h>
  31 #include <linux/ktime.h>
  32 #include <net/genetlink.h>
  33 #include <net/net_namespace.h>
  34 #include <net/netns/generic.h>
  35 #include <linux/rhashtable.h>
  36 #include "mac80211_hwsim.h"
  37
  38 #define WARN_QUEUE 100
  39 #define MAX_QUEUE 200
  40
  41 MODULE_AUTHOR("Jouni Malinen");
  42 MODULE_DESCRIPTION("Software simulator of 802.11 radio(s) for mac80211");
  43 MODULE_LICENSE("GPL");
  44
  45 static int radios = 2;
  46 module_param(radios, int, 0444);
  47 MODULE_PARM_DESC(radios, "Number of simulated radios");
  48
  49 static int channels = 1;
  50 module_param(channels, int, 0444);
  51 MODULE_PARM_DESC(channels, "Number of concurrent channels");
  52
  53 static bool paged_rx = false;
  54 module_param(paged_rx, bool, 0644);
  55 MODULE_PARM_DESC(paged_rx, "Use paged SKBs for RX instead of linear ones");
  56
  57 static bool rctbl = false;
  58 module_param(rctbl, bool, 0444);
  59 MODULE_PARM_DESC(rctbl, "Handle rate control table");
  60
  61 static bool support_p2p_device = true;
  62 module_param(support_p2p_device, bool, 0444);
  63 MODULE_PARM_DESC(support_p2p_device, "Support P2P-Device interface type");
  64
  65 /**
  66  * enum hwsim_regtest - the type of regulatory tests we offer
  67  *
  68  * These are the different values you can use for the regtest
  69  * module parameter. This is useful to help test world roaming
  70  * and the driver regulatory_hint() call and combinations of these.
  71  * If you want to do specific alpha2 regulatory domain tests simply
  72  * use the userspace regulatory request as that will be respected as
  73  * well without the need of this module parameter. This is designed
  74  * only for testing the driver regulatory request, world roaming
  75  * and all possible combinations.
  76  *
  77  * @HWSIM_REGTEST_DISABLED: No regulatory tests are performed,
  78  *      this is the default value.
  79  * @HWSIM_REGTEST_DRIVER_REG_FOLLOW: Used for testing the driver regulatory
  80  *      hint, only one driver regulatory hint will be sent as such the
  81  *      secondary radios are expected to follow.
  82  * @HWSIM_REGTEST_DRIVER_REG_ALL: Used for testing the driver regulatory
  83  *      request with all radios reporting the same regulatory domain.
  84  * @HWSIM_REGTEST_DIFF_COUNTRY: Used for testing the drivers calling
  85  *      different regulatory domains requests. Expected behaviour is for
  86  *      an intersection to occur but each device will still use their
  87  *      respective regulatory requested domains. Subsequent radios will
  88  *      use the resulting intersection.
  89  * @HWSIM_REGTEST_WORLD_ROAM: Used for testing the world roaming. We accomplish
  90  *      this by using a custom beacon-capable regulatory domain for the first
  91  *      radio. All other device world roam.
  92  * @HWSIM_REGTEST_CUSTOM_WORLD: Used for testing the custom world regulatory
  93  *      domain requests. All radios will adhere to this custom world regulatory
  94  *      domain.
  95  * @HWSIM_REGTEST_CUSTOM_WORLD_2: Used for testing 2 custom world regulatory
  96  *      domain requests. The first radio will adhere to the first custom world
  97  *      regulatory domain, the second one to the second custom world regulatory
  98  *      domain. All other devices will world roam.
  99  * @HWSIM_REGTEST_STRICT_FOLLOW_: Used for testing strict regulatory domain
 100  *      settings, only the first radio will send a regulatory domain request
 101  *      and use strict settings. The rest of the radios are expected to follow.
 102  * @HWSIM_REGTEST_STRICT_ALL: Used for testing strict regulatory domain
 103  *      settings. All radios will adhere to this.
 104  * @HWSIM_REGTEST_STRICT_AND_DRIVER_REG: Used for testing strict regulatory
 105  *      domain settings, combined with secondary driver regulatory domain
 106  *      settings. The first radio will get a strict regulatory domain setting
 107  *      using the first driver regulatory request and the second radio will use
 108  *      non-strict settings using the second driver regulatory request. All
 109  *      other devices should follow the intersection created between the
 110  *      first two.
 111  * @HWSIM_REGTEST_ALL: Used for testing every possible mix. You will need
 112  *      at least 6 radios for a complete test. We will test in this order:
 113  *      1 - driver custom world regulatory domain
 114  *      2 - second custom world regulatory domain
 115  *      3 - first driver regulatory domain request
 116  *      4 - second driver regulatory domain request
 117  *      5 - strict regulatory domain settings using the third driver regulatory
 118  *          domain request
 119  *      6 and on - should follow the intersection of the 3rd, 4rth and 5th radio
 120  *                 regulatory requests.
 121  */
 122 enum hwsim_regtest {
 123         HWSIM_REGTEST_DISABLED = 0,
 124         HWSIM_REGTEST_DRIVER_REG_FOLLOW = 1,
 125         HWSIM_REGTEST_DRIVER_REG_ALL = 2,
 126         HWSIM_REGTEST_DIFF_COUNTRY = 3,
 127         HWSIM_REGTEST_WORLD_ROAM = 4,
 128         HWSIM_REGTEST_CUSTOM_WORLD = 5,
 129         HWSIM_REGTEST_CUSTOM_WORLD_2 = 6,
 130         HWSIM_REGTEST_STRICT_FOLLOW = 7,
 131         HWSIM_REGTEST_STRICT_ALL = 8,
 132         HWSIM_REGTEST_STRICT_AND_DRIVER_REG = 9,
 133         HWSIM_REGTEST_ALL = 10,
 134 };
 135
 136 /* Set to one of the HWSIM_REGTEST_* values above */
 137 static int regtest = HWSIM_REGTEST_DISABLED;
 138 module_param(regtest, int, 0444);
 139 MODULE_PARM_DESC(regtest, "The type of regulatory test we want to run");
 140
 141 static const char *hwsim_alpha2s[] = {
 142         "FI",
 143         "AL",
 144         "US",
 145         "DE",
 146         "JP",
 147         "AL",
 148 };
 149
 150 static const struct ieee80211_regdomain hwsim_world_regdom_custom_01 = {
 151         .n_reg_rules = 4,
 152         .alpha2 =  "99",
 153         .reg_rules = {
 154                 REG_RULE(2412-10, 2462+10, 40, 0, 20, 0),
 155                 REG_RULE(2484-10, 2484+10, 40, 0, 20, 0),
 156                 REG_RULE(5150-10, 5240+10, 40, 0, 30, 0),
 157                 REG_RULE(5745-10, 5825+10, 40, 0, 30, 0),
 158         }
 159 };
 160
 161 static const struct ieee80211_regdomain hwsim_world_regdom_custom_02 = {
 162         .n_reg_rules = 2,
 163         .alpha2 =  "99",
 164         .reg_rules = {
 165                 REG_RULE(2412-10, 2462+10, 40, 0, 20, 0),
 166                 REG_RULE(5725-10, 5850+10, 40, 0, 30,
 167                          NL80211_RRF_NO_IR),
 168         }
 169 };
 170
 171 static const struct ieee80211_regdomain *hwsim_world_regdom_custom[] = {
 172         &hwsim_world_regdom_custom_01,
 173         &hwsim_world_regdom_custom_02,
 174 };
 175
 176 struct hwsim_vif_priv {
 177         u32 magic;
 178         u8 bssid[ETH_ALEN];
 179         bool assoc;
 180         bool bcn_en;
 181         u16 aid;
 182 };
 183
 184 #define HWSIM_VIF_MAGIC 0x69537748
 185
 186 static inline void hwsim_check_magic(struct ieee80211_vif *vif)
 187 {
 188         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 189         WARN(vp->magic != HWSIM_VIF_MAGIC,
 190              "Invalid VIF (%p) magic %#x, %pM, %d/%d\n",
 191              vif, vp->magic, vif->addr, vif->type, vif->p2p);
 192 }
 193
 194 static inline void hwsim_set_magic(struct ieee80211_vif *vif)
 195 {
 196         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 197         vp->magic = HWSIM_VIF_MAGIC;
 198 }
 199
 200 static inline void hwsim_clear_magic(struct ieee80211_vif *vif)
 201 {
 202         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 203         vp->magic = 0;
 204 }
 205
 206 struct hwsim_sta_priv {
 207         u32 magic;
 208 };
 209
 210 #define HWSIM_STA_MAGIC 0x6d537749
 211
 212 static inline void hwsim_check_sta_magic(struct ieee80211_sta *sta)
 213 {
 214         struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
 215         WARN_ON(sp->magic != HWSIM_STA_MAGIC);
 216 }
 217
 218 static inline void hwsim_set_sta_magic(struct ieee80211_sta *sta)
 219 {
 220         struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
 221         sp->magic = HWSIM_STA_MAGIC;
 222 }
 223
 224 static inline void hwsim_clear_sta_magic(struct ieee80211_sta *sta)
 225 {
 226         struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
 227         sp->magic = 0;
 228 }
 229
 230 struct hwsim_chanctx_priv {
 231         u32 magic;
 232 };
 233
 234 #define HWSIM_CHANCTX_MAGIC 0x6d53774a
 235
 236 static inline void hwsim_check_chanctx_magic(struct ieee80211_chanctx_conf *c)
 237 {
 238         struct hwsim_chanctx_priv *cp = (void *)c->drv_priv;
 239         WARN_ON(cp->magic != HWSIM_CHANCTX_MAGIC);
 240 }
 241
 242 static inline void hwsim_set_chanctx_magic(struct ieee80211_chanctx_conf *c)
 243 {
 244         struct hwsim_chanctx_priv *cp = (void *)c->drv_priv;
 245         cp->magic = HWSIM_CHANCTX_MAGIC;
 246 }
 247
 248 static inline void hwsim_clear_chanctx_magic(struct ieee80211_chanctx_conf *c)
 249 {
 250         struct hwsim_chanctx_priv *cp = (void *)c->drv_priv;
 251         cp->magic = 0;
 252 }
 253
 254 static unsigned int hwsim_net_id;
 255
 256 static 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 #define OUI_QCA 0x001374
 375 #define QCA_NL80211_SUBCMD_TEST 1
 376 enum qca_nl80211_vendor_subcmds {
 377         QCA_WLAN_VENDOR_ATTR_TEST = 8,
 378         QCA_WLAN_VENDOR_ATTR_MAX = QCA_WLAN_VENDOR_ATTR_TEST
 379 };
 380
 381 static const struct nla_policy
 382 hwsim_vendor_test_policy[QCA_WLAN_VENDOR_ATTR_MAX + 1] = {
 383         [QCA_WLAN_VENDOR_ATTR_MAX] = { .type = NLA_U32 },
 384 };
 385
 386 static int mac80211_hwsim_vendor_cmd_test(struct wiphy *wiphy,
 387                                           struct wireless_dev *wdev,
 388                                           const void *data, int data_len)
 389 {
 390         struct sk_buff *skb;
 391         struct nlattr *tb[QCA_WLAN_VENDOR_ATTR_MAX + 1];
 392         int err;
 393         u32 val;
 394
 395         err = nla_parse(tb, QCA_WLAN_VENDOR_ATTR_MAX, data, data_len,
 396                         hwsim_vendor_test_policy, NULL);
 397         if (err)
 398                 return err;
 399         if (!tb[QCA_WLAN_VENDOR_ATTR_TEST])
 400                 return -EINVAL;
 401         val = nla_get_u32(tb[QCA_WLAN_VENDOR_ATTR_TEST]);
 402         wiphy_dbg(wiphy, "%s: test=%u\n", __func__, val);
 403
 404         /* Send a vendor event as a test. Note that this would not normally be
 405          * done within a command handler, but rather, based on some other
 406          * trigger. For simplicity, this command is used to trigger the event
 407          * here.
 408          *
 409          * event_idx = 0 (index in mac80211_hwsim_vendor_commands)
 410          */
 411         skb = cfg80211_vendor_event_alloc(wiphy, wdev, 100, 0, GFP_KERNEL);
 412         if (skb) {
 413                 /* skb_put() or nla_put() will fill up data within
 414                  * NL80211_ATTR_VENDOR_DATA.
 415                  */
 416
 417                 /* Add vendor data */
 418                 nla_put_u32(skb, QCA_WLAN_VENDOR_ATTR_TEST, val + 1);
 419
 420                 /* Send the event - this will call nla_nest_end() */
 421                 cfg80211_vendor_event(skb, GFP_KERNEL);
 422         }
 423
 424         /* Send a response to the command */
 425         skb = cfg80211_vendor_cmd_alloc_reply_skb(wiphy, 10);
 426         if (!skb)
 427                 return -ENOMEM;
 428
 429         /* skb_put() or nla_put() will fill up data within
 430          * NL80211_ATTR_VENDOR_DATA
 431          */
 432         nla_put_u32(skb, QCA_WLAN_VENDOR_ATTR_TEST, val + 2);
 433
 434         return cfg80211_vendor_cmd_reply(skb);
 435 }
 436
 437 static struct wiphy_vendor_command mac80211_hwsim_vendor_commands[] = {
 438         {
 439                 .info = { .vendor_id = OUI_QCA,
 440                           .subcmd = QCA_NL80211_SUBCMD_TEST },
 441                 .flags = WIPHY_VENDOR_CMD_NEED_NETDEV,
 442                 .doit = mac80211_hwsim_vendor_cmd_test,
 443         }
 444 };
 445
 446 /* Advertise support vendor specific events */
 447 static const struct nl80211_vendor_cmd_info mac80211_hwsim_vendor_events[] = {
 448         { .vendor_id = OUI_QCA, .subcmd = 1 },
 449 };
 450
 451 static const struct ieee80211_iface_limit hwsim_if_limits[] = {
 452         { .max = 1, .types = BIT(NL80211_IFTYPE_ADHOC) },
 453         { .max = 2048,  .types = BIT(NL80211_IFTYPE_STATION) |
 454                                  BIT(NL80211_IFTYPE_P2P_CLIENT) |
 455 #ifdef CONFIG_MAC80211_MESH
 456                                  BIT(NL80211_IFTYPE_MESH_POINT) |
 457 #endif
 458                                  BIT(NL80211_IFTYPE_AP) |
 459                                  BIT(NL80211_IFTYPE_P2P_GO) },
 460         /* must be last, see hwsim_if_comb */
 461         { .max = 1, .types = BIT(NL80211_IFTYPE_P2P_DEVICE) }
 462 };
 463
 464 static const struct ieee80211_iface_combination hwsim_if_comb[] = {
 465         {
 466                 .limits = hwsim_if_limits,
 467                 /* remove the last entry which is P2P_DEVICE */
 468                 .n_limits = ARRAY_SIZE(hwsim_if_limits) - 1,
 469                 .max_interfaces = 2048,
 470                 .num_different_channels = 1,
 471                 .radar_detect_widths = BIT(NL80211_CHAN_WIDTH_20_NOHT) |
 472                                        BIT(NL80211_CHAN_WIDTH_20) |
 473                                        BIT(NL80211_CHAN_WIDTH_40) |
 474                                        BIT(NL80211_CHAN_WIDTH_80) |
 475                                        BIT(NL80211_CHAN_WIDTH_160),
 476         },
 477 };
 478
 479 static const struct ieee80211_iface_combination hwsim_if_comb_p2p_dev[] = {
 480         {
 481                 .limits = hwsim_if_limits,
 482                 .n_limits = ARRAY_SIZE(hwsim_if_limits),
 483                 .max_interfaces = 2048,
 484                 .num_different_channels = 1,
 485                 .radar_detect_widths = BIT(NL80211_CHAN_WIDTH_20_NOHT) |
 486                                        BIT(NL80211_CHAN_WIDTH_20) |
 487                                        BIT(NL80211_CHAN_WIDTH_40) |
 488                                        BIT(NL80211_CHAN_WIDTH_80) |
 489                                        BIT(NL80211_CHAN_WIDTH_160),
 490         },
 491 };
 492
 493 static spinlock_t hwsim_radio_lock;
 494 static LIST_HEAD(hwsim_radios);
 495 static struct workqueue_struct *hwsim_wq;
 496 static struct rhashtable hwsim_radios_rht;
 497 static int hwsim_radio_idx;
 498 static int hwsim_radios_generation = 1;
 499
 500 static struct platform_driver mac80211_hwsim_driver = {
 501         .driver = {
 502                 .name = "mac80211_hwsim",
 503         },
 504 };
 505
 506 struct mac80211_hwsim_data {
 507         struct list_head list;
 508         struct rhash_head rht;
 509         struct ieee80211_hw *hw;
 510         struct device *dev;
 511         struct ieee80211_supported_band bands[NUM_NL80211_BANDS];
 512         struct ieee80211_channel channels_2ghz[ARRAY_SIZE(hwsim_channels_2ghz)];
 513         struct ieee80211_channel channels_5ghz[ARRAY_SIZE(hwsim_channels_5ghz)];
 514         struct ieee80211_rate rates[ARRAY_SIZE(hwsim_rates)];
 515         struct ieee80211_iface_combination if_combination;
 516
 517         struct mac_address addresses[2];
 518         int channels, idx;
 519         bool use_chanctx;
 520         bool destroy_on_close;
 521         struct work_struct destroy_work;
 522         u32 portid;
 523         char alpha2[2];
 524         const struct ieee80211_regdomain *regd;
 525
 526         struct ieee80211_channel *tmp_chan;
 527         struct ieee80211_channel *roc_chan;
 528         u32 roc_duration;
 529         struct delayed_work roc_start;
 530         struct delayed_work roc_done;
 531         struct delayed_work hw_scan;
 532         struct cfg80211_scan_request *hw_scan_request;
 533         struct ieee80211_vif *hw_scan_vif;
 534         int scan_chan_idx;
 535         u8 scan_addr[ETH_ALEN];
 536         struct {
 537                 struct ieee80211_channel *channel;
 538                 unsigned long next_start, start, end;
 539         } survey_data[ARRAY_SIZE(hwsim_channels_2ghz) +
 540                       ARRAY_SIZE(hwsim_channels_5ghz)];
 541
 542         struct ieee80211_channel *channel;
 543         u64 beacon_int  /* beacon interval in us */;
 544         unsigned int rx_filter;
 545         bool started, idle, scanning;
 546         struct mutex mutex;
 547         struct tasklet_hrtimer beacon_timer;
 548         enum ps_mode {
 549                 PS_DISABLED, PS_ENABLED, PS_AUTO_POLL, PS_MANUAL_POLL
 550         } ps;
 551         bool ps_poll_pending;
 552         struct dentry *debugfs;
 553
 554         uintptr_t pending_cookie;
 555         struct sk_buff_head pending;    /* packets pending */
 556         /*
 557          * Only radios in the same group can communicate together (the
 558          * channel has to match too). Each bit represents a group. A
 559          * radio can be in more than one group.
 560          */
 561         u64 group;
 562
 563         /* group shared by radios created in the same netns */
 564         int netgroup;
 565         /* wmediumd portid responsible for netgroup of this radio */
 566         u32 wmediumd;
 567
 568         /* difference between this hw's clock and the real clock, in usecs */
 569         s64 tsf_offset;
 570         s64 bcn_delta;
 571         /* absolute beacon transmission time. Used to cover up "tx" delay. */
 572         u64 abs_bcn_ts;
 573
 574         /* Stats */
 575         u64 tx_pkts;
 576         u64 rx_pkts;
 577         u64 tx_bytes;
 578         u64 rx_bytes;
 579         u64 tx_dropped;
 580         u64 tx_failed;
 581 };
 582
 583 static const struct rhashtable_params hwsim_rht_params = {
 584         .nelem_hint = 2,
 585         .automatic_shrinking = true,
 586         .key_len = ETH_ALEN,
 587         .key_offset = offsetof(struct mac80211_hwsim_data, addresses[1]),
 588         .head_offset = offsetof(struct mac80211_hwsim_data, rht),
 589 };
 590
 591 struct hwsim_radiotap_hdr {
 592         struct ieee80211_radiotap_header hdr;
 593         __le64 rt_tsft;
 594         u8 rt_flags;
 595         u8 rt_rate;
 596         __le16 rt_channel;
 597         __le16 rt_chbitmask;
 598 } __packed;
 599
 600 struct hwsim_radiotap_ack_hdr {
 601         struct ieee80211_radiotap_header hdr;
 602         u8 rt_flags;
 603         u8 pad;
 604         __le16 rt_channel;
 605         __le16 rt_chbitmask;
 606 } __packed;
 607
 608 /* MAC80211_HWSIM netlink family */
 609 static struct genl_family hwsim_genl_family;
 610
 611 enum hwsim_multicast_groups {
 612         HWSIM_MCGRP_CONFIG,
 613 };
 614
 615 static const struct genl_multicast_group hwsim_mcgrps[] = {
 616         [HWSIM_MCGRP_CONFIG] = { .name = "config", },
 617 };
 618
 619 /* MAC80211_HWSIM netlink policy */
 620
 621 static const struct nla_policy hwsim_genl_policy[HWSIM_ATTR_MAX + 1] = {
 622         [HWSIM_ATTR_ADDR_RECEIVER] = { .type = NLA_UNSPEC, .len = ETH_ALEN },
 623         [HWSIM_ATTR_ADDR_TRANSMITTER] = { .type = NLA_UNSPEC, .len = ETH_ALEN },
 624         [HWSIM_ATTR_FRAME] = { .type = NLA_BINARY,
 625                                .len = IEEE80211_MAX_DATA_LEN },
 626         [HWSIM_ATTR_FLAGS] = { .type = NLA_U32 },
 627         [HWSIM_ATTR_RX_RATE] = { .type = NLA_U32 },
 628         [HWSIM_ATTR_SIGNAL] = { .type = NLA_U32 },
 629         [HWSIM_ATTR_TX_INFO] = { .type = NLA_UNSPEC,
 630                                  .len = IEEE80211_TX_MAX_RATES *
 631                                         sizeof(struct hwsim_tx_rate)},
 632         [HWSIM_ATTR_COOKIE] = { .type = NLA_U64 },
 633         [HWSIM_ATTR_CHANNELS] = { .type = NLA_U32 },
 634         [HWSIM_ATTR_RADIO_ID] = { .type = NLA_U32 },
 635         [HWSIM_ATTR_REG_HINT_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 636         [HWSIM_ATTR_REG_CUSTOM_REG] = { .type = NLA_U32 },
 637         [HWSIM_ATTR_REG_STRICT_REG] = { .type = NLA_FLAG },
 638         [HWSIM_ATTR_SUPPORT_P2P_DEVICE] = { .type = NLA_FLAG },
 639         [HWSIM_ATTR_DESTROY_RADIO_ON_CLOSE] = { .type = NLA_FLAG },
 640         [HWSIM_ATTR_RADIO_NAME] = { .type = NLA_STRING },
 641         [HWSIM_ATTR_NO_VIF] = { .type = NLA_FLAG },
 642         [HWSIM_ATTR_FREQ] = { .type = NLA_U32 },
 643         [HWSIM_ATTR_PERM_ADDR] = { .type = NLA_UNSPEC, .len = ETH_ALEN },
 644 };
 645
 646 static void mac80211_hwsim_tx_frame(struct ieee80211_hw *hw,
 647                                     struct sk_buff *skb,
 648                                     struct ieee80211_channel *chan);
 649
 650 /* sysfs attributes */
 651 static void hwsim_send_ps_poll(void *dat, u8 *mac, struct ieee80211_vif *vif)
 652 {
 653         struct mac80211_hwsim_data *data = dat;
 654         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 655         struct sk_buff *skb;
 656         struct ieee80211_pspoll *pspoll;
 657
 658         if (!vp->assoc)
 659                 return;
 660
 661         wiphy_dbg(data->hw->wiphy,
 662                   "%s: send PS-Poll to %pM for aid %d\n",
 663                   __func__, vp->bssid, vp->aid);
 664
 665         skb = dev_alloc_skb(sizeof(*pspoll));
 666         if (!skb)
 667                 return;
 668         pspoll = skb_put(skb, sizeof(*pspoll));
 669         pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
 670                                             IEEE80211_STYPE_PSPOLL |
 671                                             IEEE80211_FCTL_PM);
 672         pspoll->aid = cpu_to_le16(0xc000 | vp->aid);
 673         memcpy(pspoll->bssid, vp->bssid, ETH_ALEN);
 674         memcpy(pspoll->ta, mac, ETH_ALEN);
 675
 676         rcu_read_lock();
 677         mac80211_hwsim_tx_frame(data->hw, skb,
 678                                 rcu_dereference(vif->chanctx_conf)->def.chan);
 679         rcu_read_unlock();
 680 }
 681
 682 static void hwsim_send_nullfunc(struct mac80211_hwsim_data *data, u8 *mac,
 683                                 struct ieee80211_vif *vif, int ps)
 684 {
 685         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 686         struct sk_buff *skb;
 687         struct ieee80211_hdr *hdr;
 688
 689         if (!vp->assoc)
 690                 return;
 691
 692         wiphy_dbg(data->hw->wiphy,
 693                   "%s: send data::nullfunc to %pM ps=%d\n",
 694                   __func__, vp->bssid, ps);
 695
 696         skb = dev_alloc_skb(sizeof(*hdr));
 697         if (!skb)
 698                 return;
 699         hdr = skb_put(skb, sizeof(*hdr) - ETH_ALEN);
 700         hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
 701                                          IEEE80211_STYPE_NULLFUNC |
 702                                          IEEE80211_FCTL_TODS |
 703                                          (ps ? IEEE80211_FCTL_PM : 0));
 704         hdr->duration_id = cpu_to_le16(0);
 705         memcpy(hdr->addr1, vp->bssid, ETH_ALEN);
 706         memcpy(hdr->addr2, mac, ETH_ALEN);
 707         memcpy(hdr->addr3, vp->bssid, ETH_ALEN);
 708
 709         rcu_read_lock();
 710         mac80211_hwsim_tx_frame(data->hw, skb,
 711                                 rcu_dereference(vif->chanctx_conf)->def.chan);
 712         rcu_read_unlock();
 713 }
 714
 715
 716 static void hwsim_send_nullfunc_ps(void *dat, u8 *mac,
 717                                    struct ieee80211_vif *vif)
 718 {
 719         struct mac80211_hwsim_data *data = dat;
 720         hwsim_send_nullfunc(data, mac, vif, 1);
 721 }
 722
 723 static void hwsim_send_nullfunc_no_ps(void *dat, u8 *mac,
 724                                       struct ieee80211_vif *vif)
 725 {
 726         struct mac80211_hwsim_data *data = dat;
 727         hwsim_send_nullfunc(data, mac, vif, 0);
 728 }
 729
 730 static int hwsim_fops_ps_read(void *dat, u64 *val)
 731 {
 732         struct mac80211_hwsim_data *data = dat;
 733         *val = data->ps;
 734         return 0;
 735 }
 736
 737 static int hwsim_fops_ps_write(void *dat, u64 val)
 738 {
 739         struct mac80211_hwsim_data *data = dat;
 740         enum ps_mode old_ps;
 741
 742         if (val != PS_DISABLED && val != PS_ENABLED && val != PS_AUTO_POLL &&
 743             val != PS_MANUAL_POLL)
 744                 return -EINVAL;
 745
 746         if (val == PS_MANUAL_POLL) {
 747                 if (data->ps != PS_ENABLED)
 748                         return -EINVAL;
 749                 local_bh_disable();
 750                 ieee80211_iterate_active_interfaces_atomic(
 751                         data->hw, IEEE80211_IFACE_ITER_NORMAL,
 752                         hwsim_send_ps_poll, data);
 753                 local_bh_enable();
 754                 return 0;
 755         }
 756         old_ps = data->ps;
 757         data->ps = val;
 758
 759         local_bh_disable();
 760         if (old_ps == PS_DISABLED && val != PS_DISABLED) {
 761                 ieee80211_iterate_active_interfaces_atomic(
 762                         data->hw, IEEE80211_IFACE_ITER_NORMAL,
 763                         hwsim_send_nullfunc_ps, data);
 764         } else if (old_ps != PS_DISABLED && val == PS_DISABLED) {
 765                 ieee80211_iterate_active_interfaces_atomic(
 766                         data->hw, IEEE80211_IFACE_ITER_NORMAL,
 767                         hwsim_send_nullfunc_no_ps, data);
 768         }
 769         local_bh_enable();
 770
 771         return 0;
 772 }
 773
 774 DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_ps, hwsim_fops_ps_read, hwsim_fops_ps_write,
 775                         "%llu\n");
 776
 777 static int hwsim_write_simulate_radar(void *dat, u64 val)
 778 {
 779         struct mac80211_hwsim_data *data = dat;
 780
 781         ieee80211_radar_detected(data->hw);
 782
 783         return 0;
 784 }
 785
 786 DEFINE_SIMPLE_ATTRIBUTE(hwsim_simulate_radar, NULL,
 787                         hwsim_write_simulate_radar, "%llu\n");
 788
 789 static int hwsim_fops_group_read(void *dat, u64 *val)
 790 {
 791         struct mac80211_hwsim_data *data = dat;
 792         *val = data->group;
 793         return 0;
 794 }
 795
 796 static int hwsim_fops_group_write(void *dat, u64 val)
 797 {
 798         struct mac80211_hwsim_data *data = dat;
 799         data->group = val;
 800         return 0;
 801 }
 802
 803 DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_group,
 804                         hwsim_fops_group_read, hwsim_fops_group_write,
 805                         "%llx\n");
 806
 807 static netdev_tx_t hwsim_mon_xmit(struct sk_buff *skb,
 808                                         struct net_device *dev)
 809 {
 810         /* TODO: allow packet injection */
 811         dev_kfree_skb(skb);
 812         return NETDEV_TX_OK;
 813 }
 814
 815 static inline u64 mac80211_hwsim_get_tsf_raw(void)
 816 {
 817         return ktime_to_us(ktime_get_real());
 818 }
 819
 820 static __le64 __mac80211_hwsim_get_tsf(struct mac80211_hwsim_data *data)
 821 {
 822         u64 now = mac80211_hwsim_get_tsf_raw();
 823         return cpu_to_le64(now + data->tsf_offset);
 824 }
 825
 826 static u64 mac80211_hwsim_get_tsf(struct ieee80211_hw *hw,
 827                                   struct ieee80211_vif *vif)
 828 {
 829         struct mac80211_hwsim_data *data = hw->priv;
 830         return le64_to_cpu(__mac80211_hwsim_get_tsf(data));
 831 }
 832
 833 static void mac80211_hwsim_set_tsf(struct ieee80211_hw *hw,
 834                 struct ieee80211_vif *vif, u64 tsf)
 835 {
 836         struct mac80211_hwsim_data *data = hw->priv;
 837         u64 now = mac80211_hwsim_get_tsf(hw, vif);
 838         u32 bcn_int = data->beacon_int;
 839         u64 delta = abs(tsf - now);
 840
 841         /* adjust after beaconing with new timestamp at old TBTT */
 842         if (tsf > now) {
 843                 data->tsf_offset += delta;
 844                 data->bcn_delta = do_div(delta, bcn_int);
 845         } else {
 846                 data->tsf_offset -= delta;
 847                 data->bcn_delta = -(s64)do_div(delta, bcn_int);
 848         }
 849 }
 850
 851 static void mac80211_hwsim_monitor_rx(struct ieee80211_hw *hw,
 852                                       struct sk_buff *tx_skb,
 853                                       struct ieee80211_channel *chan)
 854 {
 855         struct mac80211_hwsim_data *data = hw->priv;
 856         struct sk_buff *skb;
 857         struct hwsim_radiotap_hdr *hdr;
 858         u16 flags;
 859         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_skb);
 860         struct ieee80211_rate *txrate = ieee80211_get_tx_rate(hw, info);
 861
 862         if (WARN_ON(!txrate))
 863                 return;
 864
 865         if (!netif_running(hwsim_mon))
 866                 return;
 867
 868         skb = skb_copy_expand(tx_skb, sizeof(*hdr), 0, GFP_ATOMIC);
 869         if (skb == NULL)
 870                 return;
 871
 872         hdr = skb_push(skb, sizeof(*hdr));
 873         hdr->hdr.it_version = PKTHDR_RADIOTAP_VERSION;
 874         hdr->hdr.it_pad = 0;
 875         hdr->hdr.it_len = cpu_to_le16(sizeof(*hdr));
 876         hdr->hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
 877                                           (1 << IEEE80211_RADIOTAP_RATE) |
 878                                           (1 << IEEE80211_RADIOTAP_TSFT) |
 879                                           (1 << IEEE80211_RADIOTAP_CHANNEL));
 880         hdr->rt_tsft = __mac80211_hwsim_get_tsf(data);
 881         hdr->rt_flags = 0;
 882         hdr->rt_rate = txrate->bitrate / 5;
 883         hdr->rt_channel = cpu_to_le16(chan->center_freq);
 884         flags = IEEE80211_CHAN_2GHZ;
 885         if (txrate->flags & IEEE80211_RATE_ERP_G)
 886                 flags |= IEEE80211_CHAN_OFDM;
 887         else
 888                 flags |= IEEE80211_CHAN_CCK;
 889         hdr->rt_chbitmask = cpu_to_le16(flags);
 890
 891         skb->dev = hwsim_mon;
 892         skb_reset_mac_header(skb);
 893         skb->ip_summed = CHECKSUM_UNNECESSARY;
 894         skb->pkt_type = PACKET_OTHERHOST;
 895         skb->protocol = htons(ETH_P_802_2);
 896         memset(skb->cb, 0, sizeof(skb->cb));
 897         netif_rx(skb);
 898 }
 899
 900
 901 static void mac80211_hwsim_monitor_ack(struct ieee80211_channel *chan,
 902                                        const u8 *addr)
 903 {
 904         struct sk_buff *skb;
 905         struct hwsim_radiotap_ack_hdr *hdr;
 906         u16 flags;
 907         struct ieee80211_hdr *hdr11;
 908
 909         if (!netif_running(hwsim_mon))
 910                 return;
 911
 912         skb = dev_alloc_skb(100);
 913         if (skb == NULL)
 914                 return;
 915
 916         hdr = skb_put(skb, sizeof(*hdr));
 917         hdr->hdr.it_version = PKTHDR_RADIOTAP_VERSION;
 918         hdr->hdr.it_pad = 0;
 919         hdr->hdr.it_len = cpu_to_le16(sizeof(*hdr));
 920         hdr->hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
 921                                           (1 << IEEE80211_RADIOTAP_CHANNEL));
 922         hdr->rt_flags = 0;
 923         hdr->pad = 0;
 924         hdr->rt_channel = cpu_to_le16(chan->center_freq);
 925         flags = IEEE80211_CHAN_2GHZ;
 926         hdr->rt_chbitmask = cpu_to_le16(flags);
 927
 928         hdr11 = skb_put(skb, 10);
 929         hdr11->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
 930                                            IEEE80211_STYPE_ACK);
 931         hdr11->duration_id = cpu_to_le16(0);
 932         memcpy(hdr11->addr1, addr, ETH_ALEN);
 933
 934         skb->dev = hwsim_mon;
 935         skb_reset_mac_header(skb);
 936         skb->ip_summed = CHECKSUM_UNNECESSARY;
 937         skb->pkt_type = PACKET_OTHERHOST;
 938         skb->protocol = htons(ETH_P_802_2);
 939         memset(skb->cb, 0, sizeof(skb->cb));
 940         netif_rx(skb);
 941 }
 942
 943 struct mac80211_hwsim_addr_match_data {
 944         u8 addr[ETH_ALEN];
 945         bool ret;
 946 };
 947
 948 static void mac80211_hwsim_addr_iter(void *data, u8 *mac,
 949                                      struct ieee80211_vif *vif)
 950 {
 951         struct mac80211_hwsim_addr_match_data *md = data;
 952
 953         if (memcmp(mac, md->addr, ETH_ALEN) == 0)
 954                 md->ret = true;
 955 }
 956
 957 static bool mac80211_hwsim_addr_match(struct mac80211_hwsim_data *data,
 958                                       const u8 *addr)
 959 {
 960         struct mac80211_hwsim_addr_match_data md = {
 961                 .ret = false,
 962         };
 963
 964         if (data->scanning && memcmp(addr, data->scan_addr, ETH_ALEN) == 0)
 965                 return true;
 966
 967         memcpy(md.addr, addr, ETH_ALEN);
 968
 969         ieee80211_iterate_active_interfaces_atomic(data->hw,
 970                                                    IEEE80211_IFACE_ITER_NORMAL,
 971                                                    mac80211_hwsim_addr_iter,
 972                                                    &md);
 973
 974         return md.ret;
 975 }
 976
 977 static bool hwsim_ps_rx_ok(struct mac80211_hwsim_data *data,
 978                            struct sk_buff *skb)
 979 {
 980         switch (data->ps) {
 981         case PS_DISABLED:
 982                 return true;
 983         case PS_ENABLED:
 984                 return false;
 985         case PS_AUTO_POLL:
 986                 /* TODO: accept (some) Beacons by default and other frames only
 987                  * if pending PS-Poll has been sent */
 988                 return true;
 989         case PS_MANUAL_POLL:
 990                 /* Allow unicast frames to own address if there is a pending
 991                  * PS-Poll */
 992                 if (data->ps_poll_pending &&
 993                     mac80211_hwsim_addr_match(data, skb->data + 4)) {
 994                         data->ps_poll_pending = false;
 995                         return true;
 996                 }
 997                 return false;
 998         }
 999
1000         return true;
1001 }
1002
1003 static int hwsim_unicast_netgroup(struct mac80211_hwsim_data *data,
1004                                   struct sk_buff *skb, int portid)
1005 {
1006         struct net *net;
1007         bool found = false;
1008         int res = -ENOENT;
1009
1010         rcu_read_lock();
1011         for_each_net_rcu(net) {
1012                 if (data->netgroup == hwsim_net_get_netgroup(net)) {
1013                         res = genlmsg_unicast(net, skb, portid);
1014                         found = true;
1015                         break;
1016                 }
1017         }
1018         rcu_read_unlock();
1019
1020         if (!found)
1021                 nlmsg_free(skb);
1022
1023         return res;
1024 }
1025
1026 static inline u16 trans_tx_rate_flags_ieee2hwsim(struct ieee80211_tx_rate *rate)
1027 {
1028         u16 result = 0;
1029
1030         if (rate->flags & IEEE80211_TX_RC_USE_RTS_CTS)
1031                 result |= MAC80211_HWSIM_TX_RC_USE_RTS_CTS;
1032         if (rate->flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
1033                 result |= MAC80211_HWSIM_TX_RC_USE_CTS_PROTECT;
1034         if (rate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
1035                 result |= MAC80211_HWSIM_TX_RC_USE_SHORT_PREAMBLE;
1036         if (rate->flags & IEEE80211_TX_RC_MCS)
1037                 result |= MAC80211_HWSIM_TX_RC_MCS;
1038         if (rate->flags & IEEE80211_TX_RC_GREEN_FIELD)
1039                 result |= MAC80211_HWSIM_TX_RC_GREEN_FIELD;
1040         if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
1041                 result |= MAC80211_HWSIM_TX_RC_40_MHZ_WIDTH;
1042         if (rate->flags & IEEE80211_TX_RC_DUP_DATA)
1043                 result |= MAC80211_HWSIM_TX_RC_DUP_DATA;
1044         if (rate->flags & IEEE80211_TX_RC_SHORT_GI)
1045                 result |= MAC80211_HWSIM_TX_RC_SHORT_GI;
1046         if (rate->flags & IEEE80211_TX_RC_VHT_MCS)
1047                 result |= MAC80211_HWSIM_TX_RC_VHT_MCS;
1048         if (rate->flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
1049                 result |= MAC80211_HWSIM_TX_RC_80_MHZ_WIDTH;
1050         if (rate->flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
1051                 result |= MAC80211_HWSIM_TX_RC_160_MHZ_WIDTH;
1052
1053         return result;
1054 }
1055
1056 static void mac80211_hwsim_tx_frame_nl(struct ieee80211_hw *hw,
1057                                        struct sk_buff *my_skb,
1058                                        int dst_portid)
1059 {
1060         struct sk_buff *skb;
1061         struct mac80211_hwsim_data *data = hw->priv;
1062         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) my_skb->data;
1063         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(my_skb);
1064         void *msg_head;
1065         unsigned int hwsim_flags = 0;
1066         int i;
1067         struct hwsim_tx_rate tx_attempts[IEEE80211_TX_MAX_RATES];
1068         struct hwsim_tx_rate_flag tx_attempts_flags[IEEE80211_TX_MAX_RATES];
1069         uintptr_t cookie;
1070
1071         if (data->ps != PS_DISABLED)
1072                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1073         /* If the queue contains MAX_QUEUE skb's drop some */
1074         if (skb_queue_len(&data->pending) >= MAX_QUEUE) {
1075                 /* Droping until WARN_QUEUE level */
1076                 while (skb_queue_len(&data->pending) >= WARN_QUEUE) {
1077                         ieee80211_free_txskb(hw, skb_dequeue(&data->pending));
1078                         data->tx_dropped++;
1079                 }
1080         }
1081
1082         skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1083         if (skb == NULL)
1084                 goto nla_put_failure;
1085
1086         msg_head = genlmsg_put(skb, 0, 0, &hwsim_genl_family, 0,
1087                                HWSIM_CMD_FRAME);
1088         if (msg_head == NULL) {
1089                 pr_debug("mac80211_hwsim: problem with msg_head\n");
1090                 goto nla_put_failure;
1091         }
1092
1093         if (nla_put(skb, HWSIM_ATTR_ADDR_TRANSMITTER,
1094                     ETH_ALEN, data->addresses[1].addr))
1095                 goto nla_put_failure;
1096
1097         /* We get the skb->data */
1098         if (nla_put(skb, HWSIM_ATTR_FRAME, my_skb->len, my_skb->data))
1099                 goto nla_put_failure;
1100
1101         /* We get the flags for this transmission, and we translate them to
1102            wmediumd flags  */
1103
1104         if (info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS)
1105                 hwsim_flags |= HWSIM_TX_CTL_REQ_TX_STATUS;
1106
1107         if (info->flags & IEEE80211_TX_CTL_NO_ACK)
1108                 hwsim_flags |= HWSIM_TX_CTL_NO_ACK;
1109
1110         if (nla_put_u32(skb, HWSIM_ATTR_FLAGS, hwsim_flags))
1111                 goto nla_put_failure;
1112
1113         if (nla_put_u32(skb, HWSIM_ATTR_FREQ, data->channel->center_freq))
1114                 goto nla_put_failure;
1115
1116         /* We get the tx control (rate and retries) info*/
1117
1118         for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
1119                 tx_attempts[i].idx = info->status.rates[i].idx;
1120                 tx_attempts_flags[i].idx = info->status.rates[i].idx;
1121                 tx_attempts[i].count = info->status.rates[i].count;
1122                 tx_attempts_flags[i].flags =
1123                                 trans_tx_rate_flags_ieee2hwsim(
1124                                                 &info->status.rates[i]);
1125         }
1126
1127         if (nla_put(skb, HWSIM_ATTR_TX_INFO,
1128                     sizeof(struct hwsim_tx_rate)*IEEE80211_TX_MAX_RATES,
1129                     tx_attempts))
1130                 goto nla_put_failure;
1131
1132         if (nla_put(skb, HWSIM_ATTR_TX_INFO_FLAGS,
1133                     sizeof(struct hwsim_tx_rate_flag) * IEEE80211_TX_MAX_RATES,
1134                     tx_attempts_flags))
1135                 goto nla_put_failure;
1136
1137         /* We create a cookie to identify this skb */
1138         data->pending_cookie++;
1139         cookie = data->pending_cookie;
1140         info->rate_driver_data[0] = (void *)cookie;
1141         if (nla_put_u64_64bit(skb, HWSIM_ATTR_COOKIE, cookie, HWSIM_ATTR_PAD))
1142                 goto nla_put_failure;
1143
1144         genlmsg_end(skb, msg_head);
1145         if (hwsim_unicast_netgroup(data, skb, dst_portid))
1146                 goto err_free_txskb;
1147
1148         /* Enqueue the packet */
1149         skb_queue_tail(&data->pending, my_skb);
1150         data->tx_pkts++;
1151         data->tx_bytes += my_skb->len;
1152         return;
1153
1154 nla_put_failure:
1155         nlmsg_free(skb);
1156 err_free_txskb:
1157         pr_debug("mac80211_hwsim: error occurred in %s\n", __func__);
1158         ieee80211_free_txskb(hw, my_skb);
1159         data->tx_failed++;
1160 }
1161
1162 static bool hwsim_chans_compat(struct ieee80211_channel *c1,
1163                                struct ieee80211_channel *c2)
1164 {
1165         if (!c1 || !c2)
1166                 return false;
1167
1168         return c1->center_freq == c2->center_freq;
1169 }
1170
1171 struct tx_iter_data {
1172         struct ieee80211_channel *channel;
1173         bool receive;
1174 };
1175
1176 static void mac80211_hwsim_tx_iter(void *_data, u8 *addr,
1177                                    struct ieee80211_vif *vif)
1178 {
1179         struct tx_iter_data *data = _data;
1180
1181         if (!vif->chanctx_conf)
1182                 return;
1183
1184         if (!hwsim_chans_compat(data->channel,
1185                                 rcu_dereference(vif->chanctx_conf)->def.chan))
1186                 return;
1187
1188         data->receive = true;
1189 }
1190
1191 static void mac80211_hwsim_add_vendor_rtap(struct sk_buff *skb)
1192 {
1193         /*
1194          * To enable this code, #define the HWSIM_RADIOTAP_OUI,
1195          * e.g. like this:
1196          * #define HWSIM_RADIOTAP_OUI "\x02\x00\x00"
1197          * (but you should use a valid OUI, not that)
1198          *
1199          * If anyone wants to 'donate' a radiotap OUI/subns code
1200          * please send a patch removing this #ifdef and changing
1201          * the values accordingly.
1202          */
1203 #ifdef HWSIM_RADIOTAP_OUI
1204         struct ieee80211_vendor_radiotap *rtap;
1205
1206         /*
1207          * Note that this code requires the headroom in the SKB
1208          * that was allocated earlier.
1209          */
1210         rtap = skb_push(skb, sizeof(*rtap) + 8 + 4);
1211         rtap->oui[0] = HWSIM_RADIOTAP_OUI[0];
1212         rtap->oui[1] = HWSIM_RADIOTAP_OUI[1];
1213         rtap->oui[2] = HWSIM_RADIOTAP_OUI[2];
1214         rtap->subns = 127;
1215
1216         /*
1217          * Radiotap vendor namespaces can (and should) also be
1218          * split into fields by using the standard radiotap
1219          * presence bitmap mechanism. Use just BIT(0) here for
1220          * the presence bitmap.
1221          */
1222         rtap->present = BIT(0);
1223         /* We have 8 bytes of (dummy) data */
1224         rtap->len = 8;
1225         /* For testing, also require it to be aligned */
1226         rtap->align = 8;
1227         /* And also test that padding works, 4 bytes */
1228         rtap->pad = 4;
1229         /* push the data */
1230         memcpy(rtap->data, "ABCDEFGH", 8);
1231         /* make sure to clear padding, mac80211 doesn't */
1232         memset(rtap->data + 8, 0, 4);
1233
1234         IEEE80211_SKB_RXCB(skb)->flag |= RX_FLAG_RADIOTAP_VENDOR_DATA;
1235 #endif
1236 }
1237
1238 static bool mac80211_hwsim_tx_frame_no_nl(struct ieee80211_hw *hw,
1239                                           struct sk_buff *skb,
1240                                           struct ieee80211_channel *chan)
1241 {
1242         struct mac80211_hwsim_data *data = hw->priv, *data2;
1243         bool ack = false;
1244         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1245         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1246         struct ieee80211_rx_status rx_status;
1247         u64 now;
1248
1249         memset(&rx_status, 0, sizeof(rx_status));
1250         rx_status.flag |= RX_FLAG_MACTIME_START;
1251         rx_status.freq = chan->center_freq;
1252         rx_status.band = chan->band;
1253         if (info->control.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) {
1254                 rx_status.rate_idx =
1255                         ieee80211_rate_get_vht_mcs(&info->control.rates[0]);
1256                 rx_status.nss =
1257                         ieee80211_rate_get_vht_nss(&info->control.rates[0]);
1258                 rx_status.encoding = RX_ENC_VHT;
1259         } else {
1260                 rx_status.rate_idx = info->control.rates[0].idx;
1261                 if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS)
1262                         rx_status.encoding = RX_ENC_HT;
1263         }
1264         if (info->control.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
1265                 rx_status.bw = RATE_INFO_BW_40;
1266         else if (info->control.rates[0].flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
1267                 rx_status.bw = RATE_INFO_BW_80;
1268         else if (info->control.rates[0].flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
1269                 rx_status.bw = RATE_INFO_BW_160;
1270         else
1271                 rx_status.bw = RATE_INFO_BW_20;
1272         if (info->control.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
1273                 rx_status.enc_flags |= RX_ENC_FLAG_SHORT_GI;
1274         /* TODO: simulate real signal strength (and optional packet loss) */
1275         rx_status.signal = -50;
1276         if (info->control.vif)
1277                 rx_status.signal += info->control.vif->bss_conf.txpower;
1278
1279         if (data->ps != PS_DISABLED)
1280                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1281
1282         /* release the skb's source info */
1283         skb_orphan(skb);
1284         skb_dst_drop(skb);
1285         skb->mark = 0;
1286         secpath_reset(skb);
1287         nf_reset(skb);
1288
1289         /*
1290          * Get absolute mactime here so all HWs RX at the "same time", and
1291          * absolute TX time for beacon mactime so the timestamp matches.
1292          * Giving beacons a different mactime than non-beacons looks messy, but
1293          * it helps the Toffset be exact and a ~10us mactime discrepancy
1294          * probably doesn't really matter.
1295          */
1296         if (ieee80211_is_beacon(hdr->frame_control) ||
1297             ieee80211_is_probe_resp(hdr->frame_control))
1298                 now = data->abs_bcn_ts;
1299         else
1300                 now = mac80211_hwsim_get_tsf_raw();
1301
1302         /* Copy skb to all enabled radios that are on the current frequency */
1303         spin_lock(&hwsim_radio_lock);
1304         list_for_each_entry(data2, &hwsim_radios, list) {
1305                 struct sk_buff *nskb;
1306                 struct tx_iter_data tx_iter_data = {
1307                         .receive = false,
1308                         .channel = chan,
1309                 };
1310
1311                 if (data == data2)
1312                         continue;
1313
1314                 if (!data2->started || (data2->idle && !data2->tmp_chan) ||
1315                     !hwsim_ps_rx_ok(data2, skb))
1316                         continue;
1317
1318                 if (!(data->group & data2->group))
1319                         continue;
1320
1321                 if (data->netgroup != data2->netgroup)
1322                         continue;
1323
1324                 if (!hwsim_chans_compat(chan, data2->tmp_chan) &&
1325                     !hwsim_chans_compat(chan, data2->channel)) {
1326                         ieee80211_iterate_active_interfaces_atomic(
1327                                 data2->hw, IEEE80211_IFACE_ITER_NORMAL,
1328                                 mac80211_hwsim_tx_iter, &tx_iter_data);
1329                         if (!tx_iter_data.receive)
1330                                 continue;
1331                 }
1332
1333                 /*
1334                  * reserve some space for our vendor and the normal
1335                  * radiotap header, since we're copying anyway
1336                  */
1337                 if (skb->len < PAGE_SIZE && paged_rx) {
1338                         struct page *page = alloc_page(GFP_ATOMIC);
1339
1340                         if (!page)
1341                                 continue;
1342
1343                         nskb = dev_alloc_skb(128);
1344                         if (!nskb) {
1345                                 __free_page(page);
1346                                 continue;
1347                         }
1348
1349                         memcpy(page_address(page), skb->data, skb->len);
1350                         skb_add_rx_frag(nskb, 0, page, 0, skb->len, skb->len);
1351                 } else {
1352                         nskb = skb_copy(skb, GFP_ATOMIC);
1353                         if (!nskb)
1354                                 continue;
1355                 }
1356
1357                 if (mac80211_hwsim_addr_match(data2, hdr->addr1))
1358                         ack = true;
1359
1360                 rx_status.mactime = now + data2->tsf_offset;
1361
1362                 memcpy(IEEE80211_SKB_RXCB(nskb), &rx_status, sizeof(rx_status));
1363
1364                 mac80211_hwsim_add_vendor_rtap(nskb);
1365
1366                 data2->rx_pkts++;
1367                 data2->rx_bytes += nskb->len;
1368                 ieee80211_rx_irqsafe(data2->hw, nskb);
1369         }
1370         spin_unlock(&hwsim_radio_lock);
1371
1372         return ack;
1373 }
1374
1375 static void mac80211_hwsim_tx(struct ieee80211_hw *hw,
1376                               struct ieee80211_tx_control *control,
1377                               struct sk_buff *skb)
1378 {
1379         struct mac80211_hwsim_data *data = hw->priv;
1380         struct ieee80211_tx_info *txi = IEEE80211_SKB_CB(skb);
1381         struct ieee80211_hdr *hdr = (void *)skb->data;
1382         struct ieee80211_chanctx_conf *chanctx_conf;
1383         struct ieee80211_channel *channel;
1384         bool ack;
1385         u32 _portid;
1386
1387         if (WARN_ON(skb->len < 10)) {
1388                 /* Should not happen; just a sanity check for addr1 use */
1389                 ieee80211_free_txskb(hw, skb);
1390                 return;
1391         }
1392
1393         if (!data->use_chanctx) {
1394                 channel = data->channel;
1395         } else if (txi->hw_queue == 4) {
1396                 channel = data->tmp_chan;
1397         } else {
1398                 chanctx_conf = rcu_dereference(txi->control.vif->chanctx_conf);
1399                 if (chanctx_conf)
1400                         channel = chanctx_conf->def.chan;
1401                 else
1402                         channel = NULL;
1403         }
1404
1405         if (WARN(!channel, "TX w/o channel - queue = %d\n", txi->hw_queue)) {
1406                 ieee80211_free_txskb(hw, skb);
1407                 return;
1408         }
1409
1410         if (data->idle && !data->tmp_chan) {
1411                 wiphy_dbg(hw->wiphy, "Trying to TX when idle - reject\n");
1412                 ieee80211_free_txskb(hw, skb);
1413                 return;
1414         }
1415
1416         if (txi->control.vif)
1417                 hwsim_check_magic(txi->control.vif);
1418         if (control->sta)
1419                 hwsim_check_sta_magic(control->sta);
1420
1421         if (ieee80211_hw_check(hw, SUPPORTS_RC_TABLE))
1422                 ieee80211_get_tx_rates(txi->control.vif, control->sta, skb,
1423                                        txi->control.rates,
1424                                        ARRAY_SIZE(txi->control.rates));
1425
1426         if (skb->len >= 24 + 8 &&
1427             ieee80211_is_probe_resp(hdr->frame_control)) {
1428                 /* fake header transmission time */
1429                 struct ieee80211_mgmt *mgmt;
1430                 struct ieee80211_rate *txrate;
1431                 u64 ts;
1432
1433                 mgmt = (struct ieee80211_mgmt *)skb->data;
1434                 txrate = ieee80211_get_tx_rate(hw, txi);
1435                 ts = mac80211_hwsim_get_tsf_raw();
1436                 mgmt->u.probe_resp.timestamp =
1437                         cpu_to_le64(ts + data->tsf_offset +
1438                                     24 * 8 * 10 / txrate->bitrate);
1439         }
1440
1441         mac80211_hwsim_monitor_rx(hw, skb, channel);
1442
1443         /* wmediumd mode check */
1444         _portid = READ_ONCE(data->wmediumd);
1445
1446         if (_portid)
1447                 return mac80211_hwsim_tx_frame_nl(hw, skb, _portid);
1448
1449         /* NO wmediumd detected, perfect medium simulation */
1450         data->tx_pkts++;
1451         data->tx_bytes += skb->len;
1452         ack = mac80211_hwsim_tx_frame_no_nl(hw, skb, channel);
1453
1454         if (ack && skb->len >= 16)
1455                 mac80211_hwsim_monitor_ack(channel, hdr->addr2);
1456
1457         ieee80211_tx_info_clear_status(txi);
1458
1459         /* frame was transmitted at most favorable rate at first attempt */
1460         txi->control.rates[0].count = 1;
1461         txi->control.rates[1].idx = -1;
1462
1463         if (!(txi->flags & IEEE80211_TX_CTL_NO_ACK) && ack)
1464                 txi->flags |= IEEE80211_TX_STAT_ACK;
1465         ieee80211_tx_status_irqsafe(hw, skb);
1466 }
1467
1468
1469 static int mac80211_hwsim_start(struct ieee80211_hw *hw)
1470 {
1471         struct mac80211_hwsim_data *data = hw->priv;
1472         wiphy_dbg(hw->wiphy, "%s\n", __func__);
1473         data->started = true;
1474         return 0;
1475 }
1476
1477
1478 static void mac80211_hwsim_stop(struct ieee80211_hw *hw)
1479 {
1480         struct mac80211_hwsim_data *data = hw->priv;
1481         data->started = false;
1482         tasklet_hrtimer_cancel(&data->beacon_timer);
1483         wiphy_dbg(hw->wiphy, "%s\n", __func__);
1484 }
1485
1486
1487 static int mac80211_hwsim_add_interface(struct ieee80211_hw *hw,
1488                                         struct ieee80211_vif *vif)
1489 {
1490         wiphy_dbg(hw->wiphy, "%s (type=%d mac_addr=%pM)\n",
1491                   __func__, ieee80211_vif_type_p2p(vif),
1492                   vif->addr);
1493         hwsim_set_magic(vif);
1494
1495         vif->cab_queue = 0;
1496         vif->hw_queue[IEEE80211_AC_VO] = 0;
1497         vif->hw_queue[IEEE80211_AC_VI] = 1;
1498         vif->hw_queue[IEEE80211_AC_BE] = 2;
1499         vif->hw_queue[IEEE80211_AC_BK] = 3;
1500
1501         return 0;
1502 }
1503
1504
1505 static int mac80211_hwsim_change_interface(struct ieee80211_hw *hw,
1506                                            struct ieee80211_vif *vif,
1507                                            enum nl80211_iftype newtype,
1508                                            bool newp2p)
1509 {
1510         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1511         wiphy_dbg(hw->wiphy,
1512                   "%s (old type=%d, new type=%d, mac_addr=%pM)\n",
1513                   __func__, ieee80211_vif_type_p2p(vif),
1514                     newtype, vif->addr);
1515         hwsim_check_magic(vif);
1516
1517         /*
1518          * interface may change from non-AP to AP in
1519          * which case this needs to be set up again
1520          */
1521         vif->cab_queue = 0;
1522
1523         return 0;
1524 }
1525
1526 static void mac80211_hwsim_remove_interface(
1527         struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1528 {
1529         wiphy_dbg(hw->wiphy, "%s (type=%d mac_addr=%pM)\n",
1530                   __func__, ieee80211_vif_type_p2p(vif),
1531                   vif->addr);
1532         hwsim_check_magic(vif);
1533         hwsim_clear_magic(vif);
1534 }
1535
1536 static void mac80211_hwsim_tx_frame(struct ieee80211_hw *hw,
1537                                     struct sk_buff *skb,
1538                                     struct ieee80211_channel *chan)
1539 {
1540         struct mac80211_hwsim_data *data = hw->priv;
1541         u32 _pid = READ_ONCE(data->wmediumd);
1542
1543         if (ieee80211_hw_check(hw, SUPPORTS_RC_TABLE)) {
1544                 struct ieee80211_tx_info *txi = IEEE80211_SKB_CB(skb);
1545                 ieee80211_get_tx_rates(txi->control.vif, NULL, skb,
1546                                        txi->control.rates,
1547                                        ARRAY_SIZE(txi->control.rates));
1548         }
1549
1550         mac80211_hwsim_monitor_rx(hw, skb, chan);
1551
1552         if (_pid)
1553                 return mac80211_hwsim_tx_frame_nl(hw, skb, _pid);
1554
1555         mac80211_hwsim_tx_frame_no_nl(hw, skb, chan);
1556         dev_kfree_skb(skb);
1557 }
1558
1559 static void mac80211_hwsim_beacon_tx(void *arg, u8 *mac,
1560                                      struct ieee80211_vif *vif)
1561 {
1562         struct mac80211_hwsim_data *data = arg;
1563         struct ieee80211_hw *hw = data->hw;
1564         struct ieee80211_tx_info *info;
1565         struct ieee80211_rate *txrate;
1566         struct ieee80211_mgmt *mgmt;
1567         struct sk_buff *skb;
1568
1569         hwsim_check_magic(vif);
1570
1571         if (vif->type != NL80211_IFTYPE_AP &&
1572             vif->type != NL80211_IFTYPE_MESH_POINT &&
1573             vif->type != NL80211_IFTYPE_ADHOC)
1574                 return;
1575
1576         skb = ieee80211_beacon_get(hw, vif);
1577         if (skb == NULL)
1578                 return;
1579         info = IEEE80211_SKB_CB(skb);
1580         if (ieee80211_hw_check(hw, SUPPORTS_RC_TABLE))
1581                 ieee80211_get_tx_rates(vif, NULL, skb,
1582                                        info->control.rates,
1583                                        ARRAY_SIZE(info->control.rates));
1584
1585         txrate = ieee80211_get_tx_rate(hw, info);
1586
1587         mgmt = (struct ieee80211_mgmt *) skb->data;
1588         /* fake header transmission time */
1589         data->abs_bcn_ts = mac80211_hwsim_get_tsf_raw();
1590         mgmt->u.beacon.timestamp = cpu_to_le64(data->abs_bcn_ts +
1591                                                data->tsf_offset +
1592                                                24 * 8 * 10 / txrate->bitrate);
1593
1594         mac80211_hwsim_tx_frame(hw, skb,
1595                                 rcu_dereference(vif->chanctx_conf)->def.chan);
1596
1597         if (vif->csa_active && ieee80211_csa_is_complete(vif))
1598                 ieee80211_csa_finish(vif);
1599 }
1600
1601 static enum hrtimer_restart
1602 mac80211_hwsim_beacon(struct hrtimer *timer)
1603 {
1604         struct mac80211_hwsim_data *data =
1605                 container_of(timer, struct mac80211_hwsim_data,
1606                              beacon_timer.timer);
1607         struct ieee80211_hw *hw = data->hw;
1608         u64 bcn_int = data->beacon_int;
1609         ktime_t next_bcn;
1610
1611         if (!data->started)
1612                 goto out;
1613
1614         ieee80211_iterate_active_interfaces_atomic(
1615                 hw, IEEE80211_IFACE_ITER_NORMAL,
1616                 mac80211_hwsim_beacon_tx, data);
1617
1618         /* beacon at new TBTT + beacon interval */
1619         if (data->bcn_delta) {
1620                 bcn_int -= data->bcn_delta;
1621                 data->bcn_delta = 0;
1622         }
1623
1624         next_bcn = ktime_add(hrtimer_get_expires(timer),
1625                              ns_to_ktime(bcn_int * 1000));
1626         tasklet_hrtimer_start(&data->beacon_timer, next_bcn, HRTIMER_MODE_ABS);
1627 out:
1628         return HRTIMER_NORESTART;
1629 }
1630
1631 static const char * const hwsim_chanwidths[] = {
1632         [NL80211_CHAN_WIDTH_20_NOHT] = "noht",
1633         [NL80211_CHAN_WIDTH_20] = "ht20",
1634         [NL80211_CHAN_WIDTH_40] = "ht40",
1635         [NL80211_CHAN_WIDTH_80] = "vht80",
1636         [NL80211_CHAN_WIDTH_80P80] = "vht80p80",
1637         [NL80211_CHAN_WIDTH_160] = "vht160",
1638 };
1639
1640 static int mac80211_hwsim_config(struct ieee80211_hw *hw, u32 changed)
1641 {
1642         struct mac80211_hwsim_data *data = hw->priv;
1643         struct ieee80211_conf *conf = &hw->conf;
1644         static const char *smps_modes[IEEE80211_SMPS_NUM_MODES] = {
1645                 [IEEE80211_SMPS_AUTOMATIC] = "auto",
1646                 [IEEE80211_SMPS_OFF] = "off",
1647                 [IEEE80211_SMPS_STATIC] = "static",
1648                 [IEEE80211_SMPS_DYNAMIC] = "dynamic",
1649         };
1650         int idx;
1651
1652         if (conf->chandef.chan)
1653                 wiphy_dbg(hw->wiphy,
1654                           "%s (freq=%d(%d - %d)/%s idle=%d ps=%d smps=%s)\n",
1655                           __func__,
1656                           conf->chandef.chan->center_freq,
1657                           conf->chandef.center_freq1,
1658                           conf->chandef.center_freq2,
1659                           hwsim_chanwidths[conf->chandef.width],
1660                           !!(conf->flags & IEEE80211_CONF_IDLE),
1661                           !!(conf->flags & IEEE80211_CONF_PS),
1662                           smps_modes[conf->smps_mode]);
1663         else
1664                 wiphy_dbg(hw->wiphy,
1665                           "%s (freq=0 idle=%d ps=%d smps=%s)\n",
1666                           __func__,
1667                           !!(conf->flags & IEEE80211_CONF_IDLE),
1668                           !!(conf->flags & IEEE80211_CONF_PS),
1669                           smps_modes[conf->smps_mode]);
1670
1671         data->idle = !!(conf->flags & IEEE80211_CONF_IDLE);
1672
1673         WARN_ON(conf->chandef.chan && data->use_chanctx);
1674
1675         mutex_lock(&data->mutex);
1676         if (data->scanning && conf->chandef.chan) {
1677                 for (idx = 0; idx < ARRAY_SIZE(data->survey_data); idx++) {
1678                         if (data->survey_data[idx].channel == data->channel) {
1679                                 data->survey_data[idx].start =
1680                                         data->survey_data[idx].next_start;
1681                                 data->survey_data[idx].end = jiffies;
1682                                 break;
1683                         }
1684                 }
1685
1686                 data->channel = conf->chandef.chan;
1687
1688                 for (idx = 0; idx < ARRAY_SIZE(data->survey_data); idx++) {
1689                         if (data->survey_data[idx].channel &&
1690                             data->survey_data[idx].channel != data->channel)
1691                                 continue;
1692                         data->survey_data[idx].channel = data->channel;
1693                         data->survey_data[idx].next_start = jiffies;
1694                         break;
1695                 }
1696         } else {
1697                 data->channel = conf->chandef.chan;
1698         }
1699         mutex_unlock(&data->mutex);
1700
1701         if (!data->started || !data->beacon_int)
1702                 tasklet_hrtimer_cancel(&data->beacon_timer);
1703         else if (!hrtimer_is_queued(&data->beacon_timer.timer)) {
1704                 u64 tsf = mac80211_hwsim_get_tsf(hw, NULL);
1705                 u32 bcn_int = data->beacon_int;
1706                 u64 until_tbtt = bcn_int - do_div(tsf, bcn_int);
1707
1708                 tasklet_hrtimer_start(&data->beacon_timer,
1709                                       ns_to_ktime(until_tbtt * 1000),
1710                                       HRTIMER_MODE_REL);
1711         }
1712
1713         return 0;
1714 }
1715
1716
1717 static void mac80211_hwsim_configure_filter(struct ieee80211_hw *hw,
1718                                             unsigned int changed_flags,
1719                                             unsigned int *total_flags,u64 multicast)
1720 {
1721         struct mac80211_hwsim_data *data = hw->priv;
1722
1723         wiphy_dbg(hw->wiphy, "%s\n", __func__);
1724
1725         data->rx_filter = 0;
1726         if (*total_flags & FIF_ALLMULTI)
1727                 data->rx_filter |= FIF_ALLMULTI;
1728
1729         *total_flags = data->rx_filter;
1730 }
1731
1732 static void mac80211_hwsim_bcn_en_iter(void *data, u8 *mac,
1733                                        struct ieee80211_vif *vif)
1734 {
1735         unsigned int *count = data;
1736         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
1737
1738         if (vp->bcn_en)
1739                 (*count)++;
1740 }
1741
1742 static void mac80211_hwsim_bss_info_changed(struct ieee80211_hw *hw,
1743                                             struct ieee80211_vif *vif,
1744                                             struct ieee80211_bss_conf *info,
1745                                             u32 changed)
1746 {
1747         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
1748         struct mac80211_hwsim_data *data = hw->priv;
1749
1750         hwsim_check_magic(vif);
1751
1752         wiphy_dbg(hw->wiphy, "%s(changed=0x%x vif->addr=%pM)\n",
1753                   __func__, changed, vif->addr);
1754
1755         if (changed & BSS_CHANGED_BSSID) {
1756                 wiphy_dbg(hw->wiphy, "%s: BSSID changed: %pM\n",
1757                           __func__, info->bssid);
1758                 memcpy(vp->bssid, info->bssid, ETH_ALEN);
1759         }
1760
1761         if (changed & BSS_CHANGED_ASSOC) {
1762                 wiphy_dbg(hw->wiphy, "  ASSOC: assoc=%d aid=%d\n",
1763                           info->assoc, info->aid);
1764                 vp->assoc = info->assoc;
1765                 vp->aid = info->aid;
1766         }
1767
1768         if (changed & BSS_CHANGED_BEACON_ENABLED) {
1769                 wiphy_dbg(hw->wiphy, "  BCN EN: %d (BI=%u)\n",
1770                           info->enable_beacon, info->beacon_int);
1771                 vp->bcn_en = info->enable_beacon;
1772                 if (data->started &&
1773                     !hrtimer_is_queued(&data->beacon_timer.timer) &&
1774                     info->enable_beacon) {
1775                         u64 tsf, until_tbtt;
1776                         u32 bcn_int;
1777                         data->beacon_int = info->beacon_int * 1024;
1778                         tsf = mac80211_hwsim_get_tsf(hw, vif);
1779                         bcn_int = data->beacon_int;
1780                         until_tbtt = bcn_int - do_div(tsf, bcn_int);
1781                         tasklet_hrtimer_start(&data->beacon_timer,
1782                                               ns_to_ktime(until_tbtt * 1000),
1783                                               HRTIMER_MODE_REL);
1784                 } else if (!info->enable_beacon) {
1785                         unsigned int count = 0;
1786                         ieee80211_iterate_active_interfaces_atomic(
1787                                 data->hw, IEEE80211_IFACE_ITER_NORMAL,
1788                                 mac80211_hwsim_bcn_en_iter, &count);
1789                         wiphy_dbg(hw->wiphy, "  beaconing vifs remaining: %u",
1790                                   count);
1791                         if (count == 0) {
1792                                 tasklet_hrtimer_cancel(&data->beacon_timer);
1793                                 data->beacon_int = 0;
1794                         }
1795                 }
1796         }
1797
1798         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1799                 wiphy_dbg(hw->wiphy, "  ERP_CTS_PROT: %d\n",
1800                           info->use_cts_prot);
1801         }
1802
1803         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1804                 wiphy_dbg(hw->wiphy, "  ERP_PREAMBLE: %d\n",
1805                           info->use_short_preamble);
1806         }
1807
1808         if (changed & BSS_CHANGED_ERP_SLOT) {
1809                 wiphy_dbg(hw->wiphy, "  ERP_SLOT: %d\n", info->use_short_slot);
1810         }
1811
1812         if (changed & BSS_CHANGED_HT) {
1813                 wiphy_dbg(hw->wiphy, "  HT: op_mode=0x%x\n",
1814                           info->ht_operation_mode);
1815         }
1816
1817         if (changed & BSS_CHANGED_BASIC_RATES) {
1818                 wiphy_dbg(hw->wiphy, "  BASIC_RATES: 0x%llx\n",
1819                           (unsigned long long) info->basic_rates);
1820         }
1821
1822         if (changed & BSS_CHANGED_TXPOWER)
1823                 wiphy_dbg(hw->wiphy, "  TX Power: %d dBm\n", info->txpower);
1824 }
1825
1826 static int mac80211_hwsim_sta_add(struct ieee80211_hw *hw,
1827                                   struct ieee80211_vif *vif,
1828                                   struct ieee80211_sta *sta)
1829 {
1830         hwsim_check_magic(vif);
1831         hwsim_set_sta_magic(sta);
1832
1833         return 0;
1834 }
1835
1836 static int mac80211_hwsim_sta_remove(struct ieee80211_hw *hw,
1837                                      struct ieee80211_vif *vif,
1838                                      struct ieee80211_sta *sta)
1839 {
1840         hwsim_check_magic(vif);
1841         hwsim_clear_sta_magic(sta);
1842
1843         return 0;
1844 }
1845
1846 static void mac80211_hwsim_sta_notify(struct ieee80211_hw *hw,
1847                                       struct ieee80211_vif *vif,
1848                                       enum sta_notify_cmd cmd,
1849                                       struct ieee80211_sta *sta)
1850 {
1851         hwsim_check_magic(vif);
1852
1853         switch (cmd) {
1854         case STA_NOTIFY_SLEEP:
1855         case STA_NOTIFY_AWAKE:
1856                 /* TODO: make good use of these flags */
1857                 break;
1858         default:
1859                 WARN(1, "Invalid sta notify: %d\n", cmd);
1860                 break;
1861         }
1862 }
1863
1864 static int mac80211_hwsim_set_tim(struct ieee80211_hw *hw,
1865                                   struct ieee80211_sta *sta,
1866                                   bool set)
1867 {
1868         hwsim_check_sta_magic(sta);
1869         return 0;
1870 }
1871
1872 static int mac80211_hwsim_conf_tx(
1873         struct ieee80211_hw *hw,
1874         struct ieee80211_vif *vif, u16 queue,
1875         const struct ieee80211_tx_queue_params *params)
1876 {
1877         wiphy_dbg(hw->wiphy,
1878                   "%s (queue=%d txop=%d cw_min=%d cw_max=%d aifs=%d)\n",
1879                   __func__, queue,
1880                   params->txop, params->cw_min,
1881                   params->cw_max, params->aifs);
1882         return 0;
1883 }
1884
1885 static int mac80211_hwsim_get_survey(struct ieee80211_hw *hw, int idx,
1886                                      struct survey_info *survey)
1887 {
1888         struct mac80211_hwsim_data *hwsim = hw->priv;
1889
1890         if (idx < 0 || idx >= ARRAY_SIZE(hwsim->survey_data))
1891                 return -ENOENT;
1892
1893         mutex_lock(&hwsim->mutex);
1894         survey->channel = hwsim->survey_data[idx].channel;
1895         if (!survey->channel) {
1896                 mutex_unlock(&hwsim->mutex);
1897                 return -ENOENT;
1898         }
1899
1900         /*
1901          * Magically conjured dummy values --- this is only ok for simulated hardware.
1902          *
1903          * A real driver which cannot determine real values noise MUST NOT
1904          * report any, especially not a magically conjured ones :-)
1905          */
1906         survey->filled = SURVEY_INFO_NOISE_DBM |
1907                          SURVEY_INFO_TIME |
1908                          SURVEY_INFO_TIME_BUSY;
1909         survey->noise = -92;
1910         survey->time =
1911                 jiffies_to_msecs(hwsim->survey_data[idx].end -
1912                                  hwsim->survey_data[idx].start);
1913         /* report 12.5% of channel time is used */
1914         survey->time_busy = survey->time/8;
1915         mutex_unlock(&hwsim->mutex);
1916
1917         return 0;
1918 }
1919
1920 #ifdef CONFIG_NL80211_TESTMODE
1921 /*
1922  * This section contains example code for using netlink
1923  * attributes with the testmode command in nl80211.
1924  */
1925
1926 /* These enums need to be kept in sync with userspace */
1927 enum hwsim_testmode_attr {
1928         __HWSIM_TM_ATTR_INVALID = 0,
1929         HWSIM_TM_ATTR_CMD       = 1,
1930         HWSIM_TM_ATTR_PS        = 2,
1931
1932         /* keep last */
1933         __HWSIM_TM_ATTR_AFTER_LAST,
1934         HWSIM_TM_ATTR_MAX       = __HWSIM_TM_ATTR_AFTER_LAST - 1
1935 };
1936
1937 enum hwsim_testmode_cmd {
1938         HWSIM_TM_CMD_SET_PS             = 0,
1939         HWSIM_TM_CMD_GET_PS             = 1,
1940         HWSIM_TM_CMD_STOP_QUEUES        = 2,
1941         HWSIM_TM_CMD_WAKE_QUEUES        = 3,
1942 };
1943
1944 static const struct nla_policy hwsim_testmode_policy[HWSIM_TM_ATTR_MAX + 1] = {
1945         [HWSIM_TM_ATTR_CMD] = { .type = NLA_U32 },
1946         [HWSIM_TM_ATTR_PS] = { .type = NLA_U32 },
1947 };
1948
1949 static int mac80211_hwsim_testmode_cmd(struct ieee80211_hw *hw,
1950                                        struct ieee80211_vif *vif,
1951                                        void *data, int len)
1952 {
1953         struct mac80211_hwsim_data *hwsim = hw->priv;
1954         struct nlattr *tb[HWSIM_TM_ATTR_MAX + 1];
1955         struct sk_buff *skb;
1956         int err, ps;
1957
1958         err = nla_parse(tb, HWSIM_TM_ATTR_MAX, data, len,
1959                         hwsim_testmode_policy, NULL);
1960         if (err)
1961                 return err;
1962
1963         if (!tb[HWSIM_TM_ATTR_CMD])
1964                 return -EINVAL;
1965
1966         switch (nla_get_u32(tb[HWSIM_TM_ATTR_CMD])) {
1967         case HWSIM_TM_CMD_SET_PS:
1968                 if (!tb[HWSIM_TM_ATTR_PS])
1969                         return -EINVAL;
1970                 ps = nla_get_u32(tb[HWSIM_TM_ATTR_PS]);
1971                 return hwsim_fops_ps_write(hwsim, ps);
1972         case HWSIM_TM_CMD_GET_PS:
1973                 skb = cfg80211_testmode_alloc_reply_skb(hw->wiphy,
1974                                                 nla_total_size(sizeof(u32)));
1975                 if (!skb)
1976                         return -ENOMEM;
1977                 if (nla_put_u32(skb, HWSIM_TM_ATTR_PS, hwsim->ps))
1978                         goto nla_put_failure;
1979                 return cfg80211_testmode_reply(skb);
1980         case HWSIM_TM_CMD_STOP_QUEUES:
1981                 ieee80211_stop_queues(hw);
1982                 return 0;
1983         case HWSIM_TM_CMD_WAKE_QUEUES:
1984                 ieee80211_wake_queues(hw);
1985                 return 0;
1986         default:
1987                 return -EOPNOTSUPP;
1988         }
1989
1990  nla_put_failure:
1991         kfree_skb(skb);
1992         return -ENOBUFS;
1993 }
1994 #endif
1995
1996 static int mac80211_hwsim_ampdu_action(struct ieee80211_hw *hw,
1997                                        struct ieee80211_vif *vif,
1998                                        struct ieee80211_ampdu_params *params)
1999 {
2000         struct ieee80211_sta *sta = params->sta;
2001         enum ieee80211_ampdu_mlme_action action = params->action;
2002         u16 tid = params->tid;
2003
2004         switch (action) {
2005         case IEEE80211_AMPDU_TX_START:
2006                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2007                 break;
2008         case IEEE80211_AMPDU_TX_STOP_CONT:
2009         case IEEE80211_AMPDU_TX_STOP_FLUSH:
2010         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
2011                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2012                 break;
2013         case IEEE80211_AMPDU_TX_OPERATIONAL:
2014                 break;
2015         case IEEE80211_AMPDU_RX_START:
2016         case IEEE80211_AMPDU_RX_STOP:
2017                 break;
2018         default:
2019                 return -EOPNOTSUPP;
2020         }
2021
2022         return 0;
2023 }
2024
2025 static void mac80211_hwsim_flush(struct ieee80211_hw *hw,
2026                                  struct ieee80211_vif *vif,
2027                                  u32 queues, bool drop)
2028 {
2029         /* Not implemented, queues only on kernel side */
2030 }
2031
2032 static void hw_scan_work(struct work_struct *work)
2033 {
2034         struct mac80211_hwsim_data *hwsim =
2035                 container_of(work, struct mac80211_hwsim_data, hw_scan.work);
2036         struct cfg80211_scan_request *req = hwsim->hw_scan_request;
2037         int dwell, i;
2038
2039         mutex_lock(&hwsim->mutex);
2040         if (hwsim->scan_chan_idx >= req->n_channels) {
2041                 struct cfg80211_scan_info info = {
2042                         .aborted = false,
2043                 };
2044
2045                 wiphy_dbg(hwsim->hw->wiphy, "hw scan complete\n");
2046                 ieee80211_scan_completed(hwsim->hw, &info);
2047                 hwsim->hw_scan_request = NULL;
2048                 hwsim->hw_scan_vif = NULL;
2049                 hwsim->tmp_chan = NULL;
2050                 mutex_unlock(&hwsim->mutex);
2051                 return;
2052         }
2053
2054         wiphy_dbg(hwsim->hw->wiphy, "hw scan %d MHz\n",
2055                   req->channels[hwsim->scan_chan_idx]->center_freq);
2056
2057         hwsim->tmp_chan = req->channels[hwsim->scan_chan_idx];
2058         if (hwsim->tmp_chan->flags & (IEEE80211_CHAN_NO_IR |
2059                                       IEEE80211_CHAN_RADAR) ||
2060             !req->n_ssids) {
2061                 dwell = 120;
2062         } else {
2063                 dwell = 30;
2064                 /* send probes */
2065                 for (i = 0; i < req->n_ssids; i++) {
2066                         struct sk_buff *probe;
2067                         struct ieee80211_mgmt *mgmt;
2068
2069                         probe = ieee80211_probereq_get(hwsim->hw,
2070                                                        hwsim->scan_addr,
2071                                                        req->ssids[i].ssid,
2072                                                        req->ssids[i].ssid_len,
2073                                                        req->ie_len);
2074                         if (!probe)
2075                                 continue;
2076
2077                         mgmt = (struct ieee80211_mgmt *) probe->data;
2078                         memcpy(mgmt->da, req->bssid, ETH_ALEN);
2079                         memcpy(mgmt->bssid, req->bssid, ETH_ALEN);
2080
2081                         if (req->ie_len)
2082                                 skb_put_data(probe, req->ie, req->ie_len);
2083
2084                         local_bh_disable();
2085                         mac80211_hwsim_tx_frame(hwsim->hw, probe,
2086                                                 hwsim->tmp_chan);
2087                         local_bh_enable();
2088                 }
2089         }
2090         ieee80211_queue_delayed_work(hwsim->hw, &hwsim->hw_scan,
2091                                      msecs_to_jiffies(dwell));
2092         hwsim->survey_data[hwsim->scan_chan_idx].channel = hwsim->tmp_chan;
2093         hwsim->survey_data[hwsim->scan_chan_idx].start = jiffies;
2094         hwsim->survey_data[hwsim->scan_chan_idx].end =
2095                 jiffies + msecs_to_jiffies(dwell);
2096         hwsim->scan_chan_idx++;
2097         mutex_unlock(&hwsim->mutex);
2098 }
2099
2100 static int mac80211_hwsim_hw_scan(struct ieee80211_hw *hw,
2101                                   struct ieee80211_vif *vif,
2102                                   struct ieee80211_scan_request *hw_req)
2103 {
2104         struct mac80211_hwsim_data *hwsim = hw->priv;
2105         struct cfg80211_scan_request *req = &hw_req->req;
2106
2107         mutex_lock(&hwsim->mutex);
2108         if (WARN_ON(hwsim->tmp_chan || hwsim->hw_scan_request)) {
2109                 mutex_unlock(&hwsim->mutex);
2110                 return -EBUSY;
2111         }
2112         hwsim->hw_scan_request = req;
2113         hwsim->hw_scan_vif = vif;
2114         hwsim->scan_chan_idx = 0;
2115         if (req->flags & NL80211_SCAN_FLAG_RANDOM_ADDR)
2116                 get_random_mask_addr(hwsim->scan_addr,
2117                                      hw_req->req.mac_addr,
2118                                      hw_req->req.mac_addr_mask);
2119         else
2120                 memcpy(hwsim->scan_addr, vif->addr, ETH_ALEN);
2121         memset(hwsim->survey_data, 0, sizeof(hwsim->survey_data));
2122         mutex_unlock(&hwsim->mutex);
2123
2124         wiphy_dbg(hw->wiphy, "hwsim hw_scan request\n");
2125
2126         ieee80211_queue_delayed_work(hwsim->hw, &hwsim->hw_scan, 0);
2127
2128         return 0;
2129 }
2130
2131 static void mac80211_hwsim_cancel_hw_scan(struct ieee80211_hw *hw,
2132                                           struct ieee80211_vif *vif)
2133 {
2134         struct mac80211_hwsim_data *hwsim = hw->priv;
2135         struct cfg80211_scan_info info = {
2136                 .aborted = true,
2137         };
2138
2139         wiphy_dbg(hw->wiphy, "hwsim cancel_hw_scan\n");
2140
2141         cancel_delayed_work_sync(&hwsim->hw_scan);
2142
2143         mutex_lock(&hwsim->mutex);
2144         ieee80211_scan_completed(hwsim->hw, &info);
2145         hwsim->tmp_chan = NULL;
2146         hwsim->hw_scan_request = NULL;
2147         hwsim->hw_scan_vif = NULL;
2148         mutex_unlock(&hwsim->mutex);
2149 }
2150
2151 static void mac80211_hwsim_sw_scan(struct ieee80211_hw *hw,
2152                                    struct ieee80211_vif *vif,
2153                                    const u8 *mac_addr)
2154 {
2155         struct mac80211_hwsim_data *hwsim = hw->priv;
2156
2157         mutex_lock(&hwsim->mutex);
2158
2159         if (hwsim->scanning) {
2160                 pr_debug("two hwsim sw_scans detected!\n");
2161                 goto out;
2162         }
2163
2164         pr_debug("hwsim sw_scan request, prepping stuff\n");
2165
2166         memcpy(hwsim->scan_addr, mac_addr, ETH_ALEN);
2167         hwsim->scanning = true;
2168         memset(hwsim->survey_data, 0, sizeof(hwsim->survey_data));
2169
2170 out:
2171         mutex_unlock(&hwsim->mutex);
2172 }
2173
2174 static void mac80211_hwsim_sw_scan_complete(struct ieee80211_hw *hw,
2175                                             struct ieee80211_vif *vif)
2176 {
2177         struct mac80211_hwsim_data *hwsim = hw->priv;
2178
2179         mutex_lock(&hwsim->mutex);
2180
2181         pr_debug("hwsim sw_scan_complete\n");
2182         hwsim->scanning = false;
2183         eth_zero_addr(hwsim->scan_addr);
2184
2185         mutex_unlock(&hwsim->mutex);
2186 }
2187
2188 static void hw_roc_start(struct work_struct *work)
2189 {
2190         struct mac80211_hwsim_data *hwsim =
2191                 container_of(work, struct mac80211_hwsim_data, roc_start.work);
2192
2193         mutex_lock(&hwsim->mutex);
2194
2195         wiphy_dbg(hwsim->hw->wiphy, "hwsim ROC begins\n");
2196         hwsim->tmp_chan = hwsim->roc_chan;
2197         ieee80211_ready_on_channel(hwsim->hw);
2198
2199         ieee80211_queue_delayed_work(hwsim->hw, &hwsim->roc_done,
2200                                      msecs_to_jiffies(hwsim->roc_duration));
2201
2202         mutex_unlock(&hwsim->mutex);
2203 }
2204
2205 static void hw_roc_done(struct work_struct *work)
2206 {
2207         struct mac80211_hwsim_data *hwsim =
2208                 container_of(work, struct mac80211_hwsim_data, roc_done.work);
2209
2210         mutex_lock(&hwsim->mutex);
2211         ieee80211_remain_on_channel_expired(hwsim->hw);
2212         hwsim->tmp_chan = NULL;
2213         mutex_unlock(&hwsim->mutex);
2214
2215         wiphy_dbg(hwsim->hw->wiphy, "hwsim ROC expired\n");
2216 }
2217
2218 static int mac80211_hwsim_roc(struct ieee80211_hw *hw,
2219                               struct ieee80211_vif *vif,
2220                               struct ieee80211_channel *chan,
2221                               int duration,
2222                               enum ieee80211_roc_type type)
2223 {
2224         struct mac80211_hwsim_data *hwsim = hw->priv;
2225
2226         mutex_lock(&hwsim->mutex);
2227         if (WARN_ON(hwsim->tmp_chan || hwsim->hw_scan_request)) {
2228                 mutex_unlock(&hwsim->mutex);
2229                 return -EBUSY;
2230         }
2231
2232         hwsim->roc_chan = chan;
2233         hwsim->roc_duration = duration;
2234         mutex_unlock(&hwsim->mutex);
2235
2236         wiphy_dbg(hw->wiphy, "hwsim ROC (%d MHz, %d ms)\n",
2237                   chan->center_freq, duration);
2238         ieee80211_queue_delayed_work(hw, &hwsim->roc_start, HZ/50);
2239
2240         return 0;
2241 }
2242
2243 static int mac80211_hwsim_croc(struct ieee80211_hw *hw)
2244 {
2245         struct mac80211_hwsim_data *hwsim = hw->priv;
2246
2247         cancel_delayed_work_sync(&hwsim->roc_start);
2248         cancel_delayed_work_sync(&hwsim->roc_done);
2249
2250         mutex_lock(&hwsim->mutex);
2251         hwsim->tmp_chan = NULL;
2252         mutex_unlock(&hwsim->mutex);
2253
2254         wiphy_dbg(hw->wiphy, "hwsim ROC canceled\n");
2255
2256         return 0;
2257 }
2258
2259 static int mac80211_hwsim_add_chanctx(struct ieee80211_hw *hw,
2260                                       struct ieee80211_chanctx_conf *ctx)
2261 {
2262         hwsim_set_chanctx_magic(ctx);
2263         wiphy_dbg(hw->wiphy,
2264                   "add channel context control: %d MHz/width: %d/cfreqs:%d/%d MHz\n",
2265                   ctx->def.chan->center_freq, ctx->def.width,
2266                   ctx->def.center_freq1, ctx->def.center_freq2);
2267         return 0;
2268 }
2269
2270 static void mac80211_hwsim_remove_chanctx(struct ieee80211_hw *hw,
2271                                           struct ieee80211_chanctx_conf *ctx)
2272 {
2273         wiphy_dbg(hw->wiphy,
2274                   "remove channel context control: %d MHz/width: %d/cfreqs:%d/%d MHz\n",
2275                   ctx->def.chan->center_freq, ctx->def.width,
2276                   ctx->def.center_freq1, ctx->def.center_freq2);
2277         hwsim_check_chanctx_magic(ctx);
2278         hwsim_clear_chanctx_magic(ctx);
2279 }
2280
2281 static void mac80211_hwsim_change_chanctx(struct ieee80211_hw *hw,
2282                                           struct ieee80211_chanctx_conf *ctx,
2283                                           u32 changed)
2284 {
2285         hwsim_check_chanctx_magic(ctx);
2286         wiphy_dbg(hw->wiphy,
2287                   "change channel context control: %d MHz/width: %d/cfreqs:%d/%d MHz\n",
2288                   ctx->def.chan->center_freq, ctx->def.width,
2289                   ctx->def.center_freq1, ctx->def.center_freq2);
2290 }
2291
2292 static int mac80211_hwsim_assign_vif_chanctx(struct ieee80211_hw *hw,
2293                                              struct ieee80211_vif *vif,
2294                                              struct ieee80211_chanctx_conf *ctx)
2295 {
2296         hwsim_check_magic(vif);
2297         hwsim_check_chanctx_magic(ctx);
2298
2299         return 0;
2300 }
2301
2302 static void mac80211_hwsim_unassign_vif_chanctx(struct ieee80211_hw *hw,
2303                                                 struct ieee80211_vif *vif,
2304                                                 struct ieee80211_chanctx_conf *ctx)
2305 {
2306         hwsim_check_magic(vif);
2307         hwsim_check_chanctx_magic(ctx);
2308 }
2309
2310 static const char mac80211_hwsim_gstrings_stats[][ETH_GSTRING_LEN] = {
2311         "tx_pkts_nic",
2312         "tx_bytes_nic",
2313         "rx_pkts_nic",
2314         "rx_bytes_nic",
2315         "d_tx_dropped",
2316         "d_tx_failed",
2317         "d_ps_mode",
2318         "d_group",
2319 };
2320
2321 #define MAC80211_HWSIM_SSTATS_LEN ARRAY_SIZE(mac80211_hwsim_gstrings_stats)
2322
2323 static void mac80211_hwsim_get_et_strings(struct ieee80211_hw *hw,
2324                                           struct ieee80211_vif *vif,
2325                                           u32 sset, u8 *data)
2326 {
2327         if (sset == ETH_SS_STATS)
2328                 memcpy(data, *mac80211_hwsim_gstrings_stats,
2329                        sizeof(mac80211_hwsim_gstrings_stats));
2330 }
2331
2332 static int mac80211_hwsim_get_et_sset_count(struct ieee80211_hw *hw,
2333                                             struct ieee80211_vif *vif, int sset)
2334 {
2335         if (sset == ETH_SS_STATS)
2336                 return MAC80211_HWSIM_SSTATS_LEN;
2337         return 0;
2338 }
2339
2340 static void mac80211_hwsim_get_et_stats(struct ieee80211_hw *hw,
2341                                         struct ieee80211_vif *vif,
2342                                         struct ethtool_stats *stats, u64 *data)
2343 {
2344         struct mac80211_hwsim_data *ar = hw->priv;
2345         int i = 0;
2346
2347         data[i++] = ar->tx_pkts;
2348         data[i++] = ar->tx_bytes;
2349         data[i++] = ar->rx_pkts;
2350         data[i++] = ar->rx_bytes;
2351         data[i++] = ar->tx_dropped;
2352         data[i++] = ar->tx_failed;
2353         data[i++] = ar->ps;
2354         data[i++] = ar->group;
2355
2356         WARN_ON(i != MAC80211_HWSIM_SSTATS_LEN);
2357 }
2358
2359 #define HWSIM_COMMON_OPS                                        \
2360         .tx = mac80211_hwsim_tx,                                \
2361         .start = mac80211_hwsim_start,                          \
2362         .stop = mac80211_hwsim_stop,                            \
2363         .add_interface = mac80211_hwsim_add_interface,          \
2364         .change_interface = mac80211_hwsim_change_interface,    \
2365         .remove_interface = mac80211_hwsim_remove_interface,    \
2366         .config = mac80211_hwsim_config,                        \
2367         .configure_filter = mac80211_hwsim_configure_filter,    \
2368         .bss_info_changed = mac80211_hwsim_bss_info_changed,    \
2369         .sta_add = mac80211_hwsim_sta_add,                      \
2370         .sta_remove = mac80211_hwsim_sta_remove,                \
2371         .sta_notify = mac80211_hwsim_sta_notify,                \
2372         .set_tim = mac80211_hwsim_set_tim,                      \
2373         .conf_tx = mac80211_hwsim_conf_tx,                      \
2374         .get_survey = mac80211_hwsim_get_survey,                \
2375         CFG80211_TESTMODE_CMD(mac80211_hwsim_testmode_cmd)      \
2376         .ampdu_action = mac80211_hwsim_ampdu_action,            \
2377         .flush = mac80211_hwsim_flush,                          \
2378         .get_tsf = mac80211_hwsim_get_tsf,                      \
2379         .set_tsf = mac80211_hwsim_set_tsf,                      \
2380         .get_et_sset_count = mac80211_hwsim_get_et_sset_count,  \
2381         .get_et_stats = mac80211_hwsim_get_et_stats,            \
2382         .get_et_strings = mac80211_hwsim_get_et_strings,
2383
2384 static const struct ieee80211_ops mac80211_hwsim_ops = {
2385         HWSIM_COMMON_OPS
2386         .sw_scan_start = mac80211_hwsim_sw_scan,
2387         .sw_scan_complete = mac80211_hwsim_sw_scan_complete,
2388 };
2389
2390 static const struct ieee80211_ops mac80211_hwsim_mchan_ops = {
2391         HWSIM_COMMON_OPS
2392         .hw_scan = mac80211_hwsim_hw_scan,
2393         .cancel_hw_scan = mac80211_hwsim_cancel_hw_scan,
2394         .sw_scan_start = NULL,
2395         .sw_scan_complete = NULL,
2396         .remain_on_channel = mac80211_hwsim_roc,
2397         .cancel_remain_on_channel = mac80211_hwsim_croc,
2398         .add_chanctx = mac80211_hwsim_add_chanctx,
2399         .remove_chanctx = mac80211_hwsim_remove_chanctx,
2400         .change_chanctx = mac80211_hwsim_change_chanctx,
2401         .assign_vif_chanctx = mac80211_hwsim_assign_vif_chanctx,
2402         .unassign_vif_chanctx = mac80211_hwsim_unassign_vif_chanctx,
2403 };
2404
2405 struct hwsim_new_radio_params {
2406         unsigned int channels;
2407         const char *reg_alpha2;
2408         const struct ieee80211_regdomain *regd;
2409         bool reg_strict;
2410         bool p2p_device;
2411         bool use_chanctx;
2412         bool destroy_on_close;
2413         const char *hwname;
2414         bool no_vif;
2415         const u8 *perm_addr;
2416 };
2417
2418 static void hwsim_mcast_config_msg(struct sk_buff *mcast_skb,
2419                                    struct genl_info *info)
2420 {
2421         if (info)
2422                 genl_notify(&hwsim_genl_family, mcast_skb, info,
2423                             HWSIM_MCGRP_CONFIG, GFP_KERNEL);
2424         else
2425                 genlmsg_multicast(&hwsim_genl_family, mcast_skb, 0,
2426                                   HWSIM_MCGRP_CONFIG, GFP_KERNEL);
2427 }
2428
2429 static int append_radio_msg(struct sk_buff *skb, int id,
2430                             struct hwsim_new_radio_params *param)
2431 {
2432         int ret;
2433
2434         ret = nla_put_u32(skb, HWSIM_ATTR_RADIO_ID, id);
2435         if (ret < 0)
2436                 return ret;
2437
2438         if (param->channels) {
2439                 ret = nla_put_u32(skb, HWSIM_ATTR_CHANNELS, param->channels);
2440                 if (ret < 0)
2441                         return ret;
2442         }
2443
2444         if (param->reg_alpha2) {
2445                 ret = nla_put(skb, HWSIM_ATTR_REG_HINT_ALPHA2, 2,
2446                               param->reg_alpha2);
2447                 if (ret < 0)
2448                         return ret;
2449         }
2450
2451         if (param->regd) {
2452                 int i;
2453
2454                 for (i = 0; i < ARRAY_SIZE(hwsim_world_regdom_custom); i++) {
2455                         if (hwsim_world_regdom_custom[i] != param->regd)
2456                                 continue;
2457
2458                         ret = nla_put_u32(skb, HWSIM_ATTR_REG_CUSTOM_REG, i);
2459                         if (ret < 0)
2460                                 return ret;
2461                         break;
2462                 }
2463         }
2464
2465         if (param->reg_strict) {
2466                 ret = nla_put_flag(skb, HWSIM_ATTR_REG_STRICT_REG);
2467                 if (ret < 0)
2468                         return ret;
2469         }
2470
2471         if (param->p2p_device) {
2472                 ret = nla_put_flag(skb, HWSIM_ATTR_SUPPORT_P2P_DEVICE);
2473                 if (ret < 0)
2474                         return ret;
2475         }
2476
2477         if (param->use_chanctx) {
2478                 ret = nla_put_flag(skb, HWSIM_ATTR_USE_CHANCTX);
2479                 if (ret < 0)
2480                         return ret;
2481         }
2482
2483         if (param->hwname) {
2484                 ret = nla_put(skb, HWSIM_ATTR_RADIO_NAME,
2485                               strlen(param->hwname), param->hwname);
2486                 if (ret < 0)
2487                         return ret;
2488         }
2489
2490         return 0;
2491 }
2492
2493 static void hwsim_mcast_new_radio(int id, struct genl_info *info,
2494                                   struct hwsim_new_radio_params *param)
2495 {
2496         struct sk_buff *mcast_skb;
2497         void *data;
2498
2499         mcast_skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2500         if (!mcast_skb)
2501                 return;
2502
2503         data = genlmsg_put(mcast_skb, 0, 0, &hwsim_genl_family, 0,
2504                            HWSIM_CMD_NEW_RADIO);
2505         if (!data)
2506                 goto out_err;
2507
2508         if (append_radio_msg(mcast_skb, id, param) < 0)
2509                 goto out_err;
2510
2511         genlmsg_end(mcast_skb, data);
2512
2513         hwsim_mcast_config_msg(mcast_skb, info);
2514         return;
2515
2516 out_err:
2517         nlmsg_free(mcast_skb);
2518 }
2519
2520 static int mac80211_hwsim_new_radio(struct genl_info *info,
2521                                     struct hwsim_new_radio_params *param)
2522 {
2523         int err;
2524         u8 addr[ETH_ALEN];
2525         struct mac80211_hwsim_data *data;
2526         struct ieee80211_hw *hw;
2527         enum nl80211_band band;
2528         const struct ieee80211_ops *ops = &mac80211_hwsim_ops;
2529         struct net *net;
2530         int idx;
2531
2532         if (WARN_ON(param->channels > 1 && !param->use_chanctx))
2533                 return -EINVAL;
2534
2535         spin_lock_bh(&hwsim_radio_lock);
2536         idx = hwsim_radio_idx++;
2537         spin_unlock_bh(&hwsim_radio_lock);
2538
2539         if (param->use_chanctx)
2540                 ops = &mac80211_hwsim_mchan_ops;
2541         hw = ieee80211_alloc_hw_nm(sizeof(*data), ops, param->hwname);
2542         if (!hw) {
2543                 pr_debug("mac80211_hwsim: ieee80211_alloc_hw failed\n");
2544                 err = -ENOMEM;
2545                 goto failed;
2546         }
2547
2548         /* ieee80211_alloc_hw_nm may have used a default name */
2549         param->hwname = wiphy_name(hw->wiphy);
2550
2551         if (info)
2552                 net = genl_info_net(info);
2553         else
2554                 net = &init_net;
2555         wiphy_net_set(hw->wiphy, net);
2556
2557         data = hw->priv;
2558         data->hw = hw;
2559
2560         data->dev = device_create(hwsim_class, NULL, 0, hw, "hwsim%d", idx);
2561         if (IS_ERR(data->dev)) {
2562                 printk(KERN_DEBUG
2563                        "mac80211_hwsim: device_create failed (%ld)\n",
2564                        PTR_ERR(data->dev));
2565                 err = -ENOMEM;
2566                 goto failed_drvdata;
2567         }
2568         data->dev->driver = &mac80211_hwsim_driver.driver;
2569         err = device_bind_driver(data->dev);
2570         if (err != 0) {
2571                 pr_debug("mac80211_hwsim: device_bind_driver failed (%d)\n",
2572                        err);
2573                 goto failed_bind;
2574         }
2575
2576         skb_queue_head_init(&data->pending);
2577
2578         SET_IEEE80211_DEV(hw, data->dev);
2579         if (!param->perm_addr) {
2580                 eth_zero_addr(addr);
2581                 addr[0] = 0x02;
2582                 addr[3] = idx >> 8;
2583                 addr[4] = idx;
2584                 memcpy(data->addresses[0].addr, addr, ETH_ALEN);
2585                 /* Why need here second address ? */
2586                 memcpy(data->addresses[1].addr, addr, ETH_ALEN);
2587                 data->addresses[1].addr[0] |= 0x40;
2588                 hw->wiphy->n_addresses = 2;
2589                 hw->wiphy->addresses = data->addresses;
2590                 /* possible address clash is checked at hash table insertion */
2591         } else {
2592                 memcpy(data->addresses[0].addr, param->perm_addr, ETH_ALEN);
2593                 /* compatibility with automatically generated mac addr */
2594                 memcpy(data->addresses[1].addr, param->perm_addr, ETH_ALEN);
2595                 hw->wiphy->n_addresses = 2;
2596                 hw->wiphy->addresses = data->addresses;
2597         }
2598
2599         data->channels = param->channels;
2600         data->use_chanctx = param->use_chanctx;
2601         data->idx = idx;
2602         data->destroy_on_close = param->destroy_on_close;
2603         if (info)
2604                 data->portid = info->snd_portid;
2605
2606         if (data->use_chanctx) {
2607                 hw->wiphy->max_scan_ssids = 255;
2608                 hw->wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
2609                 hw->wiphy->max_remain_on_channel_duration = 1000;
2610                 hw->wiphy->iface_combinations = &data->if_combination;
2611                 if (param->p2p_device)
2612                         data->if_combination = hwsim_if_comb_p2p_dev[0];
2613                 else
2614                         data->if_combination = hwsim_if_comb[0];
2615                 hw->wiphy->n_iface_combinations = 1;
2616                 /* For channels > 1 DFS is not allowed */
2617                 data->if_combination.radar_detect_widths = 0;
2618                 data->if_combination.num_different_channels = data->channels;
2619         } else if (param->p2p_device) {
2620                 hw->wiphy->iface_combinations = hwsim_if_comb_p2p_dev;
2621                 hw->wiphy->n_iface_combinations =
2622                         ARRAY_SIZE(hwsim_if_comb_p2p_dev);
2623         } else {
2624                 hw->wiphy->iface_combinations = hwsim_if_comb;
2625                 hw->wiphy->n_iface_combinations = ARRAY_SIZE(hwsim_if_comb);
2626         }
2627
2628         INIT_DELAYED_WORK(&data->roc_start, hw_roc_start);
2629         INIT_DELAYED_WORK(&data->roc_done, hw_roc_done);
2630         INIT_DELAYED_WORK(&data->hw_scan, hw_scan_work);
2631
2632         hw->queues = 5;
2633         hw->offchannel_tx_hw_queue = 4;
2634         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
2635                                      BIT(NL80211_IFTYPE_AP) |
2636                                      BIT(NL80211_IFTYPE_P2P_CLIENT) |
2637                                      BIT(NL80211_IFTYPE_P2P_GO) |
2638                                      BIT(NL80211_IFTYPE_ADHOC) |
2639                                      BIT(NL80211_IFTYPE_MESH_POINT);
2640
2641         if (param->p2p_device)
2642                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_P2P_DEVICE);
2643
2644         ieee80211_hw_set(hw, SUPPORT_FAST_XMIT);
2645         ieee80211_hw_set(hw, CHANCTX_STA_CSA);
2646         ieee80211_hw_set(hw, SUPPORTS_HT_CCK_RATES);
2647         ieee80211_hw_set(hw, QUEUE_CONTROL);
2648         ieee80211_hw_set(hw, WANT_MONITOR_VIF);
2649         ieee80211_hw_set(hw, AMPDU_AGGREGATION);
2650         ieee80211_hw_set(hw, MFP_CAPABLE);
2651         ieee80211_hw_set(hw, SIGNAL_DBM);
2652         ieee80211_hw_set(hw, SUPPORTS_PS);
2653         ieee80211_hw_set(hw, TDLS_WIDER_BW);
2654         if (rctbl)
2655                 ieee80211_hw_set(hw, SUPPORTS_RC_TABLE);
2656
2657         hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS |
2658                             WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL |
2659                             WIPHY_FLAG_AP_UAPSD |
2660                             WIPHY_FLAG_HAS_CHANNEL_SWITCH;
2661         hw->wiphy->features |= NL80211_FEATURE_ACTIVE_MONITOR |
2662                                NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE |
2663                                NL80211_FEATURE_STATIC_SMPS |
2664                                NL80211_FEATURE_DYNAMIC_SMPS |
2665                                NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR;
2666         wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_VHT_IBSS);
2667
2668         /* ask mac80211 to reserve space for magic */
2669         hw->vif_data_size = sizeof(struct hwsim_vif_priv);
2670         hw->sta_data_size = sizeof(struct hwsim_sta_priv);
2671         hw->chanctx_data_size = sizeof(struct hwsim_chanctx_priv);
2672
2673         memcpy(data->channels_2ghz, hwsim_channels_2ghz,
2674                 sizeof(hwsim_channels_2ghz));
2675         memcpy(data->channels_5ghz, hwsim_channels_5ghz,
2676                 sizeof(hwsim_channels_5ghz));
2677         memcpy(data->rates, hwsim_rates, sizeof(hwsim_rates));
2678
2679         for (band = NL80211_BAND_2GHZ; band < NUM_NL80211_BANDS; band++) {
2680                 struct ieee80211_supported_band *sband = &data->bands[band];
2681                 switch (band) {
2682                 case NL80211_BAND_2GHZ:
2683                         sband->channels = data->channels_2ghz;
2684                         sband->n_channels = ARRAY_SIZE(hwsim_channels_2ghz);
2685                         sband->bitrates = data->rates;
2686                         sband->n_bitrates = ARRAY_SIZE(hwsim_rates);
2687                         break;
2688                 case NL80211_BAND_5GHZ:
2689                         sband->channels = data->channels_5ghz;
2690                         sband->n_channels = ARRAY_SIZE(hwsim_channels_5ghz);
2691                         sband->bitrates = data->rates + 4;
2692                         sband->n_bitrates = ARRAY_SIZE(hwsim_rates) - 4;
2693
2694                         sband->vht_cap.vht_supported = true;
2695                         sband->vht_cap.cap =
2696                                 IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454 |
2697                                 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ |
2698                                 IEEE80211_VHT_CAP_RXLDPC |
2699                                 IEEE80211_VHT_CAP_SHORT_GI_80 |
2700                                 IEEE80211_VHT_CAP_SHORT_GI_160 |
2701                                 IEEE80211_VHT_CAP_TXSTBC |
2702                                 IEEE80211_VHT_CAP_RXSTBC_1 |
2703                                 IEEE80211_VHT_CAP_RXSTBC_2 |
2704                                 IEEE80211_VHT_CAP_RXSTBC_3 |
2705                                 IEEE80211_VHT_CAP_RXSTBC_4 |
2706                                 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
2707                         sband->vht_cap.vht_mcs.rx_mcs_map =
2708                                 cpu_to_le16(IEEE80211_VHT_MCS_SUPPORT_0_9 << 0 |
2709                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 2 |
2710                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 4 |
2711                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 6 |
2712                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 8 |
2713                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 10 |
2714                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 12 |
2715                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 14);
2716                         sband->vht_cap.vht_mcs.tx_mcs_map =
2717                                 sband->vht_cap.vht_mcs.rx_mcs_map;
2718                         break;
2719                 default:
2720                         continue;
2721                 }
2722
2723                 sband->ht_cap.ht_supported = true;
2724                 sband->ht_cap.cap = IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
2725                                     IEEE80211_HT_CAP_GRN_FLD |
2726                                     IEEE80211_HT_CAP_SGI_20 |
2727                                     IEEE80211_HT_CAP_SGI_40 |
2728                                     IEEE80211_HT_CAP_DSSSCCK40;
2729                 sband->ht_cap.ampdu_factor = 0x3;
2730                 sband->ht_cap.ampdu_density = 0x6;
2731                 memset(&sband->ht_cap.mcs, 0,
2732                        sizeof(sband->ht_cap.mcs));
2733                 sband->ht_cap.mcs.rx_mask[0] = 0xff;
2734                 sband->ht_cap.mcs.rx_mask[1] = 0xff;
2735                 sband->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
2736
2737                 hw->wiphy->bands[band] = sband;
2738         }
2739
2740         /* By default all radios belong to the first group */
2741         data->group = 1;
2742         mutex_init(&data->mutex);
2743
2744         data->netgroup = hwsim_net_get_netgroup(net);
2745         data->wmediumd = hwsim_net_get_wmediumd(net);
2746
2747         /* Enable frame retransmissions for lossy channels */
2748         hw->max_rates = 4;
2749         hw->max_rate_tries = 11;
2750
2751         hw->wiphy->vendor_commands = mac80211_hwsim_vendor_commands;
2752         hw->wiphy->n_vendor_commands =
2753                 ARRAY_SIZE(mac80211_hwsim_vendor_commands);
2754         hw->wiphy->vendor_events = mac80211_hwsim_vendor_events;
2755         hw->wiphy->n_vendor_events = ARRAY_SIZE(mac80211_hwsim_vendor_events);
2756
2757         if (param->reg_strict)
2758                 hw->wiphy->regulatory_flags |= REGULATORY_STRICT_REG;
2759         if (param->regd) {
2760                 data->regd = param->regd;
2761                 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG;
2762                 wiphy_apply_custom_regulatory(hw->wiphy, param->regd);
2763                 /* give the regulatory workqueue a chance to run */
2764                 schedule_timeout_interruptible(1);
2765         }
2766
2767         if (param->no_vif)
2768                 ieee80211_hw_set(hw, NO_AUTO_VIF);
2769
2770         wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
2771
2772         err = ieee80211_register_hw(hw);
2773         if (err < 0) {
2774                 pr_debug("mac80211_hwsim: ieee80211_register_hw failed (%d)\n",
2775                        err);
2776                 goto failed_hw;
2777         }
2778
2779         wiphy_dbg(hw->wiphy, "hwaddr %pM registered\n", hw->wiphy->perm_addr);
2780
2781         if (param->reg_alpha2) {
2782                 data->alpha2[0] = param->reg_alpha2[0];
2783                 data->alpha2[1] = param->reg_alpha2[1];
2784                 regulatory_hint(hw->wiphy, param->reg_alpha2);
2785         }
2786
2787         data->debugfs = debugfs_create_dir("hwsim", hw->wiphy->debugfsdir);
2788         debugfs_create_file("ps", 0666, data->debugfs, data, &hwsim_fops_ps);
2789         debugfs_create_file("group", 0666, data->debugfs, data,
2790                             &hwsim_fops_group);
2791         if (!data->use_chanctx)
2792                 debugfs_create_file("dfs_simulate_radar", 0222,
2793                                     data->debugfs,
2794                                     data, &hwsim_simulate_radar);
2795
2796         tasklet_hrtimer_init(&data->beacon_timer,
2797                              mac80211_hwsim_beacon,
2798                              CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2799
2800         spin_lock_bh(&hwsim_radio_lock);
2801         err = rhashtable_insert_fast(&hwsim_radios_rht, &data->rht,
2802                                      hwsim_rht_params);
2803         if (err < 0) {
2804                 if (info) {
2805                         GENL_SET_ERR_MSG(info, "perm addr already present");
2806                         NL_SET_BAD_ATTR(info->extack,
2807                                         info->attrs[HWSIM_ATTR_PERM_ADDR]);
2808                 }
2809                 spin_unlock_bh(&hwsim_radio_lock);
2810                 goto failed_final_insert;
2811         }
2812
2813         list_add_tail(&data->list, &hwsim_radios);
2814         hwsim_radios_generation++;
2815         spin_unlock_bh(&hwsim_radio_lock);
2816
2817         if (idx > 0)
2818                 hwsim_mcast_new_radio(idx, info, param);
2819
2820         return idx;
2821
2822 failed_final_insert:
2823         debugfs_remove_recursive(data->debugfs);
2824         ieee80211_unregister_hw(data->hw);
2825 failed_hw:
2826         device_release_driver(data->dev);
2827 failed_bind:
2828         device_unregister(data->dev);
2829 failed_drvdata:
2830         ieee80211_free_hw(hw);
2831 failed:
2832         return err;
2833 }
2834
2835 static void hwsim_mcast_del_radio(int id, const char *hwname,
2836                                   struct genl_info *info)
2837 {
2838         struct sk_buff *skb;
2839         void *data;
2840         int ret;
2841
2842         skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2843         if (!skb)
2844                 return;
2845
2846         data = genlmsg_put(skb, 0, 0, &hwsim_genl_family, 0,
2847                            HWSIM_CMD_DEL_RADIO);
2848         if (!data)
2849                 goto error;
2850
2851         ret = nla_put_u32(skb, HWSIM_ATTR_RADIO_ID, id);
2852         if (ret < 0)
2853                 goto error;
2854
2855         ret = nla_put(skb, HWSIM_ATTR_RADIO_NAME, strlen(hwname),
2856                       hwname);
2857         if (ret < 0)
2858                 goto error;
2859
2860         genlmsg_end(skb, data);
2861
2862         hwsim_mcast_config_msg(skb, info);
2863
2864         return;
2865
2866 error:
2867         nlmsg_free(skb);
2868 }
2869
2870 static void mac80211_hwsim_del_radio(struct mac80211_hwsim_data *data,
2871                                      const char *hwname,
2872                                      struct genl_info *info)
2873 {
2874         hwsim_mcast_del_radio(data->idx, hwname, info);
2875         debugfs_remove_recursive(data->debugfs);
2876         ieee80211_unregister_hw(data->hw);
2877         device_release_driver(data->dev);
2878         device_unregister(data->dev);
2879         ieee80211_free_hw(data->hw);
2880 }
2881
2882 static int mac80211_hwsim_get_radio(struct sk_buff *skb,
2883                                     struct mac80211_hwsim_data *data,
2884                                     u32 portid, u32 seq,
2885                                     struct netlink_callback *cb, int flags)
2886 {
2887         void *hdr;
2888         struct hwsim_new_radio_params param = { };
2889         int res = -EMSGSIZE;
2890
2891         hdr = genlmsg_put(skb, portid, seq, &hwsim_genl_family, flags,
2892                           HWSIM_CMD_GET_RADIO);
2893         if (!hdr)
2894                 return -EMSGSIZE;
2895
2896         if (cb)
2897                 genl_dump_check_consistent(cb, hdr);
2898
2899         if (data->alpha2[0] && data->alpha2[1])
2900                 param.reg_alpha2 = data->alpha2;
2901
2902         param.reg_strict = !!(data->hw->wiphy->regulatory_flags &
2903                                         REGULATORY_STRICT_REG);
2904         param.p2p_device = !!(data->hw->wiphy->interface_modes &
2905                                         BIT(NL80211_IFTYPE_P2P_DEVICE));
2906         param.use_chanctx = data->use_chanctx;
2907         param.regd = data->regd;
2908         param.channels = data->channels;
2909         param.hwname = wiphy_name(data->hw->wiphy);
2910
2911         res = append_radio_msg(skb, data->idx, &param);
2912         if (res < 0)
2913                 goto out_err;
2914
2915         genlmsg_end(skb, hdr);
2916         return 0;
2917
2918 out_err:
2919         genlmsg_cancel(skb, hdr);
2920         return res;
2921 }
2922
2923 static void mac80211_hwsim_free(void)
2924 {
2925         struct mac80211_hwsim_data *data;
2926
2927         spin_lock_bh(&hwsim_radio_lock);
2928         while ((data = list_first_entry_or_null(&hwsim_radios,
2929                                                 struct mac80211_hwsim_data,
2930                                                 list))) {
2931                 list_del(&data->list);
2932                 spin_unlock_bh(&hwsim_radio_lock);
2933                 mac80211_hwsim_del_radio(data, wiphy_name(data->hw->wiphy),
2934                                          NULL);
2935                 spin_lock_bh(&hwsim_radio_lock);
2936         }
2937         spin_unlock_bh(&hwsim_radio_lock);
2938         class_destroy(hwsim_class);
2939 }
2940
2941 static const struct net_device_ops hwsim_netdev_ops = {
2942         .ndo_start_xmit         = hwsim_mon_xmit,
2943         .ndo_set_mac_address    = eth_mac_addr,
2944         .ndo_validate_addr      = eth_validate_addr,
2945 };
2946
2947 static void hwsim_mon_setup(struct net_device *dev)
2948 {
2949         dev->netdev_ops = &hwsim_netdev_ops;
2950         dev->needs_free_netdev = true;
2951         ether_setup(dev);
2952         dev->priv_flags |= IFF_NO_QUEUE;
2953         dev->type = ARPHRD_IEEE80211_RADIOTAP;
2954         eth_zero_addr(dev->dev_addr);
2955         dev->dev_addr[0] = 0x12;
2956 }
2957
2958 static struct mac80211_hwsim_data *get_hwsim_data_ref_from_addr(const u8 *addr)
2959 {
2960         return rhashtable_lookup_fast(&hwsim_radios_rht,
2961                                       addr,
2962                                       hwsim_rht_params);
2963 }
2964
2965 static void hwsim_register_wmediumd(struct net *net, u32 portid)
2966 {
2967         struct mac80211_hwsim_data *data;
2968
2969         hwsim_net_set_wmediumd(net, portid);
2970
2971         spin_lock_bh(&hwsim_radio_lock);
2972         list_for_each_entry(data, &hwsim_radios, list) {
2973                 if (data->netgroup == hwsim_net_get_netgroup(net))
2974                         data->wmediumd = portid;
2975         }
2976         spin_unlock_bh(&hwsim_radio_lock);
2977 }
2978
2979 static int hwsim_tx_info_frame_received_nl(struct sk_buff *skb_2,
2980                                            struct genl_info *info)
2981 {
2982
2983         struct ieee80211_hdr *hdr;
2984         struct mac80211_hwsim_data *data2;
2985         struct ieee80211_tx_info *txi;
2986         struct hwsim_tx_rate *tx_attempts;
2987         u64 ret_skb_cookie;
2988         struct sk_buff *skb, *tmp;
2989         const u8 *src;
2990         unsigned int hwsim_flags;
2991         int i;
2992         bool found = false;
2993
2994         if (!info->attrs[HWSIM_ATTR_ADDR_TRANSMITTER] ||
2995             !info->attrs[HWSIM_ATTR_FLAGS] ||
2996             !info->attrs[HWSIM_ATTR_COOKIE] ||
2997             !info->attrs[HWSIM_ATTR_SIGNAL] ||
2998             !info->attrs[HWSIM_ATTR_TX_INFO])
2999                 goto out;
3000
3001         src = (void *)nla_data(info->attrs[HWSIM_ATTR_ADDR_TRANSMITTER]);
3002         hwsim_flags = nla_get_u32(info->attrs[HWSIM_ATTR_FLAGS]);
3003         ret_skb_cookie = nla_get_u64(info->attrs[HWSIM_ATTR_COOKIE]);
3004
3005         data2 = get_hwsim_data_ref_from_addr(src);
3006         if (!data2)
3007                 goto out;
3008
3009         if (hwsim_net_get_netgroup(genl_info_net(info)) != data2->netgroup)
3010                 goto out;
3011
3012         if (info->snd_portid != data2->wmediumd)
3013                 goto out;
3014
3015         /* look for the skb matching the cookie passed back from user */
3016         skb_queue_walk_safe(&data2->pending, skb, tmp) {
3017                 u64 skb_cookie;
3018
3019                 txi = IEEE80211_SKB_CB(skb);
3020                 skb_cookie = (u64)(uintptr_t)txi->rate_driver_data[0];
3021
3022                 if (skb_cookie == ret_skb_cookie) {
3023                         skb_unlink(skb, &data2->pending);
3024                         found = true;
3025                         break;
3026                 }
3027         }
3028
3029         /* not found */
3030         if (!found)
3031                 goto out;
3032
3033         /* Tx info received because the frame was broadcasted on user space,
3034          so we get all the necessary info: tx attempts and skb control buff */
3035
3036         tx_attempts = (struct hwsim_tx_rate *)nla_data(
3037                        info->attrs[HWSIM_ATTR_TX_INFO]);
3038
3039         /* now send back TX status */
3040         txi = IEEE80211_SKB_CB(skb);
3041
3042         ieee80211_tx_info_clear_status(txi);
3043
3044         for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
3045                 txi->status.rates[i].idx = tx_attempts[i].idx;
3046                 txi->status.rates[i].count = tx_attempts[i].count;
3047         }
3048
3049         txi->status.ack_signal = nla_get_u32(info->attrs[HWSIM_ATTR_SIGNAL]);
3050
3051         if (!(hwsim_flags & HWSIM_TX_CTL_NO_ACK) &&
3052            (hwsim_flags & HWSIM_TX_STAT_ACK)) {
3053                 if (skb->len >= 16) {
3054                         hdr = (struct ieee80211_hdr *) skb->data;
3055                         mac80211_hwsim_monitor_ack(data2->channel,
3056                                                    hdr->addr2);
3057                 }
3058                 txi->flags |= IEEE80211_TX_STAT_ACK;
3059         }
3060         ieee80211_tx_status_irqsafe(data2->hw, skb);
3061         return 0;
3062 out:
3063         return -EINVAL;
3064
3065 }
3066
3067 static int hwsim_cloned_frame_received_nl(struct sk_buff *skb_2,
3068                                           struct genl_info *info)
3069 {
3070         struct mac80211_hwsim_data *data2;
3071         struct ieee80211_rx_status rx_status;
3072         const u8 *dst;
3073         int frame_data_len;
3074         void *frame_data;
3075         struct sk_buff *skb = NULL;
3076
3077         if (!info->attrs[HWSIM_ATTR_ADDR_RECEIVER] ||
3078             !info->attrs[HWSIM_ATTR_FRAME] ||
3079             !info->attrs[HWSIM_ATTR_RX_RATE] ||
3080             !info->attrs[HWSIM_ATTR_SIGNAL])
3081                 goto out;
3082
3083         dst = (void *)nla_data(info->attrs[HWSIM_ATTR_ADDR_RECEIVER]);
3084         frame_data_len = nla_len(info->attrs[HWSIM_ATTR_FRAME]);
3085         frame_data = (void *)nla_data(info->attrs[HWSIM_ATTR_FRAME]);
3086
3087         /* Allocate new skb here */
3088         skb = alloc_skb(frame_data_len, GFP_KERNEL);
3089         if (skb == NULL)
3090                 goto err;
3091
3092         if (frame_data_len > IEEE80211_MAX_DATA_LEN)
3093                 goto err;
3094
3095         /* Copy the data */
3096         skb_put_data(skb, frame_data, frame_data_len);
3097
3098         data2 = get_hwsim_data_ref_from_addr(dst);
3099         if (!data2)
3100                 goto out;
3101
3102         if (hwsim_net_get_netgroup(genl_info_net(info)) != data2->netgroup)
3103                 goto out;
3104
3105         if (info->snd_portid != data2->wmediumd)
3106                 goto out;
3107
3108         /* check if radio is configured properly */
3109
3110         if (data2->idle || !data2->started)
3111                 goto out;
3112
3113         /* A frame is received from user space */
3114         memset(&rx_status, 0, sizeof(rx_status));
3115         if (info->attrs[HWSIM_ATTR_FREQ]) {
3116                 /* throw away off-channel packets, but allow both the temporary
3117                  * ("hw" scan/remain-on-channel) and regular channel, since the
3118                  * internal datapath also allows this
3119                  */
3120                 mutex_lock(&data2->mutex);
3121                 rx_status.freq = nla_get_u32(info->attrs[HWSIM_ATTR_FREQ]);
3122
3123                 if (rx_status.freq != data2->channel->center_freq &&
3124                     (!data2->tmp_chan ||
3125                      rx_status.freq != data2->tmp_chan->center_freq)) {
3126                         mutex_unlock(&data2->mutex);
3127                         goto out;
3128                 }
3129                 mutex_unlock(&data2->mutex);
3130         } else {
3131                 rx_status.freq = data2->channel->center_freq;
3132         }
3133
3134         rx_status.band = data2->channel->band;
3135         rx_status.rate_idx = nla_get_u32(info->attrs[HWSIM_ATTR_RX_RATE]);
3136         rx_status.signal = nla_get_u32(info->attrs[HWSIM_ATTR_SIGNAL]);
3137
3138         memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
3139         data2->rx_pkts++;
3140         data2->rx_bytes += skb->len;
3141         ieee80211_rx_irqsafe(data2->hw, skb);
3142
3143         return 0;
3144 err:
3145         pr_debug("mac80211_hwsim: error occurred in %s\n", __func__);
3146 out:
3147         dev_kfree_skb(skb);
3148         return -EINVAL;
3149 }
3150
3151 static int hwsim_register_received_nl(struct sk_buff *skb_2,
3152                                       struct genl_info *info)
3153 {
3154         struct net *net = genl_info_net(info);
3155         struct mac80211_hwsim_data *data;
3156         int chans = 1;
3157
3158         spin_lock_bh(&hwsim_radio_lock);
3159         list_for_each_entry(data, &hwsim_radios, list)
3160                 chans = max(chans, data->channels);
3161         spin_unlock_bh(&hwsim_radio_lock);
3162
3163         /* In the future we should revise the userspace API and allow it
3164          * to set a flag that it does support multi-channel, then we can
3165          * let this pass conditionally on the flag.
3166          * For current userspace, prohibit it since it won't work right.
3167          */
3168         if (chans > 1)
3169                 return -EOPNOTSUPP;
3170
3171         if (hwsim_net_get_wmediumd(net))
3172                 return -EBUSY;
3173
3174         hwsim_register_wmediumd(net, info->snd_portid);
3175
3176         pr_debug("mac80211_hwsim: received a REGISTER, "
3177                "switching to wmediumd mode with pid %d\n", info->snd_portid);
3178
3179         return 0;
3180 }
3181
3182 static int hwsim_new_radio_nl(struct sk_buff *msg, struct genl_info *info)
3183 {
3184         struct hwsim_new_radio_params param = { 0 };
3185         const char *hwname = NULL;
3186         int ret;
3187
3188         param.reg_strict = info->attrs[HWSIM_ATTR_REG_STRICT_REG];
3189         param.p2p_device = info->attrs[HWSIM_ATTR_SUPPORT_P2P_DEVICE];
3190         param.channels = channels;
3191         param.destroy_on_close =
3192                 info->attrs[HWSIM_ATTR_DESTROY_RADIO_ON_CLOSE];
3193
3194         if (info->attrs[HWSIM_ATTR_CHANNELS])
3195                 param.channels = nla_get_u32(info->attrs[HWSIM_ATTR_CHANNELS]);
3196
3197         if (param.channels > CFG80211_MAX_NUM_DIFFERENT_CHANNELS) {
3198                 GENL_SET_ERR_MSG(info, "too many channels specified");
3199                 return -EINVAL;
3200         }
3201
3202         if (info->attrs[HWSIM_ATTR_NO_VIF])
3203                 param.no_vif = true;
3204
3205         if (info->attrs[HWSIM_ATTR_RADIO_NAME]) {
3206                 hwname = kasprintf(GFP_KERNEL, "%.*s",
3207                                    nla_len(info->attrs[HWSIM_ATTR_RADIO_NAME]),
3208                                    (char *)nla_data(info->attrs[HWSIM_ATTR_RADIO_NAME]));
3209                 if (!hwname)
3210                         return -ENOMEM;
3211                 param.hwname = hwname;
3212         }
3213
3214         if (info->attrs[HWSIM_ATTR_USE_CHANCTX])
3215                 param.use_chanctx = true;
3216         else
3217                 param.use_chanctx = (param.channels > 1);
3218
3219         if (info->attrs[HWSIM_ATTR_REG_HINT_ALPHA2])
3220                 param.reg_alpha2 =
3221                         nla_data(info->attrs[HWSIM_ATTR_REG_HINT_ALPHA2]);
3222
3223         if (info->attrs[HWSIM_ATTR_REG_CUSTOM_REG]) {
3224                 u32 idx = nla_get_u32(info->attrs[HWSIM_ATTR_REG_CUSTOM_REG]);
3225
3226                 if (idx >= ARRAY_SIZE(hwsim_world_regdom_custom)) {
3227                         kfree(hwname);
3228                         return -EINVAL;
3229                 }
3230                 param.regd = hwsim_world_regdom_custom[idx];
3231         }
3232
3233         if (info->attrs[HWSIM_ATTR_PERM_ADDR]) {
3234                 if (!is_valid_ether_addr(
3235                                 nla_data(info->attrs[HWSIM_ATTR_PERM_ADDR]))) {
3236                         GENL_SET_ERR_MSG(info,"MAC is no valid source addr");
3237                         NL_SET_BAD_ATTR(info->extack,
3238                                         info->attrs[HWSIM_ATTR_PERM_ADDR]);
3239                         kfree(hwname);
3240                         return -EINVAL;
3241                 }
3242
3243
3244                 param.perm_addr = nla_data(info->attrs[HWSIM_ATTR_PERM_ADDR]);
3245         }
3246
3247         ret = mac80211_hwsim_new_radio(info, &param);
3248         kfree(hwname);
3249         return ret;
3250 }
3251
3252 static int hwsim_del_radio_nl(struct sk_buff *msg, struct genl_info *info)
3253 {
3254         struct mac80211_hwsim_data *data;
3255         s64 idx = -1;
3256         const char *hwname = NULL;
3257
3258         if (info->attrs[HWSIM_ATTR_RADIO_ID]) {
3259                 idx = nla_get_u32(info->attrs[HWSIM_ATTR_RADIO_ID]);
3260         } else if (info->attrs[HWSIM_ATTR_RADIO_NAME]) {
3261                 hwname = kasprintf(GFP_KERNEL, "%.*s",
3262                                    nla_len(info->attrs[HWSIM_ATTR_RADIO_NAME]),
3263                                    (char *)nla_data(info->attrs[HWSIM_ATTR_RADIO_NAME]));
3264                 if (!hwname)
3265                         return -ENOMEM;
3266         } else
3267                 return -EINVAL;
3268
3269         spin_lock_bh(&hwsim_radio_lock);
3270         list_for_each_entry(data, &hwsim_radios, list) {
3271                 if (idx >= 0) {
3272                         if (data->idx != idx)
3273                                 continue;
3274                 } else {
3275                         if (!hwname ||
3276                             strcmp(hwname, wiphy_name(data->hw->wiphy)))
3277                                 continue;
3278                 }
3279
3280                 if (!net_eq(wiphy_net(data->hw->wiphy), genl_info_net(info)))
3281                         continue;
3282
3283                 list_del(&data->list);
3284                 rhashtable_remove_fast(&hwsim_radios_rht, &data->rht,
3285                                        hwsim_rht_params);
3286                 hwsim_radios_generation++;
3287                 spin_unlock_bh(&hwsim_radio_lock);
3288                 mac80211_hwsim_del_radio(data, wiphy_name(data->hw->wiphy),
3289                                          info);
3290                 kfree(hwname);
3291                 return 0;
3292         }
3293         spin_unlock_bh(&hwsim_radio_lock);
3294
3295         kfree(hwname);
3296         return -ENODEV;
3297 }
3298
3299 static int hwsim_get_radio_nl(struct sk_buff *msg, struct genl_info *info)
3300 {
3301         struct mac80211_hwsim_data *data;
3302         struct sk_buff *skb;
3303         int idx, res = -ENODEV;
3304
3305         if (!info->attrs[HWSIM_ATTR_RADIO_ID])
3306                 return -EINVAL;
3307         idx = nla_get_u32(info->attrs[HWSIM_ATTR_RADIO_ID]);
3308
3309         spin_lock_bh(&hwsim_radio_lock);
3310         list_for_each_entry(data, &hwsim_radios, list) {
3311                 if (data->idx != idx)
3312                         continue;
3313
3314                 if (!net_eq(wiphy_net(data->hw->wiphy), genl_info_net(info)))
3315                         continue;
3316
3317                 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
3318                 if (!skb) {
3319                         res = -ENOMEM;
3320                         goto out_err;
3321                 }
3322
3323                 res = mac80211_hwsim_get_radio(skb, data, info->snd_portid,
3324                                                info->snd_seq, NULL, 0);
3325                 if (res < 0) {
3326                         nlmsg_free(skb);
3327                         goto out_err;
3328                 }
3329
3330                 genlmsg_reply(skb, info);
3331                 break;
3332         }
3333
3334 out_err:
3335         spin_unlock_bh(&hwsim_radio_lock);
3336
3337         return res;
3338 }
3339
3340 static int hwsim_dump_radio_nl(struct sk_buff *skb,
3341                                struct netlink_callback *cb)
3342 {
3343         int last_idx = cb->args[0] - 1;
3344         struct mac80211_hwsim_data *data = NULL;
3345         int res = 0;
3346         void *hdr;
3347
3348         spin_lock_bh(&hwsim_radio_lock);
3349         cb->seq = hwsim_radios_generation;
3350
3351         if (last_idx >= hwsim_radio_idx-1)
3352                 goto done;
3353
3354         list_for_each_entry(data, &hwsim_radios, list) {
3355                 if (data->idx <= last_idx)
3356                         continue;
3357
3358                 if (!net_eq(wiphy_net(data->hw->wiphy), sock_net(skb->sk)))
3359                         continue;
3360
3361                 res = mac80211_hwsim_get_radio(skb, data,
3362                                                NETLINK_CB(cb->skb).portid,
3363                                                cb->nlh->nlmsg_seq, cb,
3364                                                NLM_F_MULTI);
3365                 if (res < 0)
3366                         break;
3367
3368                 last_idx = data->idx;
3369         }
3370
3371         cb->args[0] = last_idx + 1;
3372
3373         /* list changed, but no new element sent, set interrupted flag */
3374         if (skb->len == 0 && cb->prev_seq && cb->seq != cb->prev_seq) {
3375                 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid,
3376                                   cb->nlh->nlmsg_seq, &hwsim_genl_family,
3377                                   NLM_F_MULTI, HWSIM_CMD_GET_RADIO);
3378                 if (!hdr)
3379                         res = -EMSGSIZE;
3380                 genl_dump_check_consistent(cb, hdr);
3381                 genlmsg_end(skb, hdr);
3382         }
3383
3384 done:
3385         spin_unlock_bh(&hwsim_radio_lock);
3386         return res ?: skb->len;
3387 }
3388
3389 /* Generic Netlink operations array */
3390 static const struct genl_ops hwsim_ops[] = {
3391         {
3392                 .cmd = HWSIM_CMD_REGISTER,
3393                 .policy = hwsim_genl_policy,
3394                 .doit = hwsim_register_received_nl,
3395                 .flags = GENL_UNS_ADMIN_PERM,
3396         },
3397         {
3398                 .cmd = HWSIM_CMD_FRAME,
3399                 .policy = hwsim_genl_policy,
3400                 .doit = hwsim_cloned_frame_received_nl,
3401         },
3402         {
3403                 .cmd = HWSIM_CMD_TX_INFO_FRAME,
3404                 .policy = hwsim_genl_policy,
3405                 .doit = hwsim_tx_info_frame_received_nl,
3406         },
3407         {
3408                 .cmd = HWSIM_CMD_NEW_RADIO,
3409                 .policy = hwsim_genl_policy,
3410                 .doit = hwsim_new_radio_nl,
3411                 .flags = GENL_UNS_ADMIN_PERM,
3412         },
3413         {
3414                 .cmd = HWSIM_CMD_DEL_RADIO,
3415                 .policy = hwsim_genl_policy,
3416                 .doit = hwsim_del_radio_nl,
3417                 .flags = GENL_UNS_ADMIN_PERM,
3418         },
3419         {
3420                 .cmd = HWSIM_CMD_GET_RADIO,
3421                 .policy = hwsim_genl_policy,
3422                 .doit = hwsim_get_radio_nl,
3423                 .dumpit = hwsim_dump_radio_nl,
3424         },
3425 };
3426
3427 static struct genl_family hwsim_genl_family __ro_after_init = {
3428         .name = "MAC80211_HWSIM",
3429         .version = 1,
3430         .maxattr = HWSIM_ATTR_MAX,
3431         .netnsok = true,
3432         .module = THIS_MODULE,
3433         .ops = hwsim_ops,
3434         .n_ops = ARRAY_SIZE(hwsim_ops),
3435         .mcgrps = hwsim_mcgrps,
3436         .n_mcgrps = ARRAY_SIZE(hwsim_mcgrps),
3437 };
3438
3439 static void destroy_radio(struct work_struct *work)
3440 {
3441         struct mac80211_hwsim_data *data =
3442                 container_of(work, struct mac80211_hwsim_data, destroy_work);
3443
3444         hwsim_radios_generation++;
3445         mac80211_hwsim_del_radio(data, wiphy_name(data->hw->wiphy), NULL);
3446 }
3447
3448 static void remove_user_radios(u32 portid)
3449 {
3450         struct mac80211_hwsim_data *entry, *tmp;
3451
3452         spin_lock_bh(&hwsim_radio_lock);
3453         list_for_each_entry_safe(entry, tmp, &hwsim_radios, list) {
3454                 if (entry->destroy_on_close && entry->portid == portid) {
3455                         list_del(&entry->list);
3456                         rhashtable_remove_fast(&hwsim_radios_rht, &entry->rht,
3457                                                hwsim_rht_params);
3458                         INIT_WORK(&entry->destroy_work, destroy_radio);
3459                         queue_work(hwsim_wq, &entry->destroy_work);
3460                 }
3461         }
3462         spin_unlock_bh(&hwsim_radio_lock);
3463 }
3464
3465 static int mac80211_hwsim_netlink_notify(struct notifier_block *nb,
3466                                          unsigned long state,
3467                                          void *_notify)
3468 {
3469         struct netlink_notify *notify = _notify;
3470
3471         if (state != NETLINK_URELEASE)
3472                 return NOTIFY_DONE;
3473
3474         remove_user_radios(notify->portid);
3475
3476         if (notify->portid == hwsim_net_get_wmediumd(notify->net)) {
3477                 printk(KERN_INFO "mac80211_hwsim: wmediumd released netlink"
3478                        " socket, switching to perfect channel medium\n");
3479                 hwsim_register_wmediumd(notify->net, 0);
3480         }
3481         return NOTIFY_DONE;
3482
3483 }
3484
3485 static struct notifier_block hwsim_netlink_notifier = {
3486         .notifier_call = mac80211_hwsim_netlink_notify,
3487 };
3488
3489 static int __init hwsim_init_netlink(void)
3490 {
3491         int rc;
3492
3493         printk(KERN_INFO "mac80211_hwsim: initializing netlink\n");
3494
3495         rc = genl_register_family(&hwsim_genl_family);
3496         if (rc)
3497                 goto failure;
3498
3499         rc = netlink_register_notifier(&hwsim_netlink_notifier);
3500         if (rc) {
3501                 genl_unregister_family(&hwsim_genl_family);
3502                 goto failure;
3503         }
3504
3505         return 0;
3506
3507 failure:
3508         pr_debug("mac80211_hwsim: error occurred in %s\n", __func__);
3509         return -EINVAL;
3510 }
3511
3512 static __net_init int hwsim_init_net(struct net *net)
3513 {
3514         return hwsim_net_set_netgroup(net);
3515 }
3516
3517 static void __net_exit hwsim_exit_net(struct net *net)
3518 {
3519         struct mac80211_hwsim_data *data, *tmp;
3520
3521         spin_lock_bh(&hwsim_radio_lock);
3522         list_for_each_entry_safe(data, tmp, &hwsim_radios, list) {
3523                 if (!net_eq(wiphy_net(data->hw->wiphy), net))
3524                         continue;
3525
3526                 /* Radios created in init_net are returned to init_net. */
3527                 if (data->netgroup == hwsim_net_get_netgroup(&init_net))
3528                         continue;
3529
3530                 list_del(&data->list);
3531                 rhashtable_remove_fast(&hwsim_radios_rht, &data->rht,
3532                                        hwsim_rht_params);
3533                 hwsim_radios_generation++;
3534                 spin_unlock_bh(&hwsim_radio_lock);
3535                 mac80211_hwsim_del_radio(data,
3536                                          wiphy_name(data->hw->wiphy),
3537                                          NULL);
3538                 spin_lock_bh(&hwsim_radio_lock);
3539         }
3540         spin_unlock_bh(&hwsim_radio_lock);
3541
3542         ida_simple_remove(&hwsim_netgroup_ida, hwsim_net_get_netgroup(net));
3543 }
3544
3545 static struct pernet_operations hwsim_net_ops = {
3546         .init = hwsim_init_net,
3547         .exit = hwsim_exit_net,
3548         .id   = &hwsim_net_id,
3549         .size = sizeof(struct hwsim_net),
3550 };
3551
3552 static void hwsim_exit_netlink(void)
3553 {
3554         /* unregister the notifier */
3555         netlink_unregister_notifier(&hwsim_netlink_notifier);
3556         /* unregister the family */
3557         genl_unregister_family(&hwsim_genl_family);
3558 }
3559
3560 static int __init init_mac80211_hwsim(void)
3561 {
3562         int i, err;
3563
3564         if (radios < 0 || radios > 100)
3565                 return -EINVAL;
3566
3567         if (channels < 1)
3568                 return -EINVAL;
3569
3570         spin_lock_init(&hwsim_radio_lock);
3571
3572         hwsim_wq = alloc_workqueue("hwsim_wq", 0, 0);
3573         if (!hwsim_wq)
3574                 return -ENOMEM;
3575
3576         err = rhashtable_init(&hwsim_radios_rht, &hwsim_rht_params);
3577         if (err)
3578                 goto out_free_wq;
3579
3580         err = register_pernet_device(&hwsim_net_ops);
3581         if (err)
3582                 goto out_free_rht;
3583
3584         err = platform_driver_register(&mac80211_hwsim_driver);
3585         if (err)
3586                 goto out_unregister_pernet;
3587
3588         hwsim_class = class_create(THIS_MODULE, "mac80211_hwsim");
3589         if (IS_ERR(hwsim_class)) {
3590                 err = PTR_ERR(hwsim_class);
3591                 goto out_unregister_driver;
3592         }
3593
3594         err = hwsim_init_netlink();
3595         if (err < 0)
3596                 goto out_unregister_driver;
3597
3598         for (i = 0; i < radios; i++) {
3599                 struct hwsim_new_radio_params param = { 0 };
3600
3601                 param.channels = channels;
3602
3603                 switch (regtest) {
3604                 case HWSIM_REGTEST_DIFF_COUNTRY:
3605                         if (i < ARRAY_SIZE(hwsim_alpha2s))
3606                                 param.reg_alpha2 = hwsim_alpha2s[i];
3607                         break;
3608                 case HWSIM_REGTEST_DRIVER_REG_FOLLOW:
3609                         if (!i)
3610                                 param.reg_alpha2 = hwsim_alpha2s[0];
3611                         break;
3612                 case HWSIM_REGTEST_STRICT_ALL:
3613                         param.reg_strict = true;
3614                 case HWSIM_REGTEST_DRIVER_REG_ALL:
3615                         param.reg_alpha2 = hwsim_alpha2s[0];
3616                         break;
3617                 case HWSIM_REGTEST_WORLD_ROAM:
3618                         if (i == 0)
3619                                 param.regd = &hwsim_world_regdom_custom_01;
3620                         break;
3621                 case HWSIM_REGTEST_CUSTOM_WORLD:
3622                         param.regd = &hwsim_world_regdom_custom_01;
3623                         break;
3624                 case HWSIM_REGTEST_CUSTOM_WORLD_2:
3625                         if (i == 0)
3626                                 param.regd = &hwsim_world_regdom_custom_01;
3627                         else if (i == 1)
3628                                 param.regd = &hwsim_world_regdom_custom_02;
3629                         break;
3630                 case HWSIM_REGTEST_STRICT_FOLLOW:
3631                         if (i == 0) {
3632                                 param.reg_strict = true;
3633                                 param.reg_alpha2 = hwsim_alpha2s[0];
3634                         }
3635                         break;
3636                 case HWSIM_REGTEST_STRICT_AND_DRIVER_REG:
3637                         if (i == 0) {
3638                                 param.reg_strict = true;
3639                                 param.reg_alpha2 = hwsim_alpha2s[0];
3640                         } else if (i == 1) {
3641                                 param.reg_alpha2 = hwsim_alpha2s[1];
3642                         }
3643                         break;
3644                 case HWSIM_REGTEST_ALL:
3645                         switch (i) {
3646                         case 0:
3647                                 param.regd = &hwsim_world_regdom_custom_01;
3648                                 break;
3649                         case 1:
3650                                 param.regd = &hwsim_world_regdom_custom_02;
3651                                 break;
3652                         case 2:
3653                                 param.reg_alpha2 = hwsim_alpha2s[0];
3654                                 break;
3655                         case 3:
3656                                 param.reg_alpha2 = hwsim_alpha2s[1];
3657                                 break;
3658                         case 4:
3659                                 param.reg_strict = true;
3660                                 param.reg_alpha2 = hwsim_alpha2s[2];
3661                                 break;
3662                         }
3663                         break;
3664                 default:
3665                         break;
3666                 }
3667
3668                 param.p2p_device = support_p2p_device;
3669                 param.use_chanctx = channels > 1;
3670
3671                 err = mac80211_hwsim_new_radio(NULL, &param);
3672                 if (err < 0)
3673                         goto out_free_radios;
3674         }
3675
3676         hwsim_mon = alloc_netdev(0, "hwsim%d", NET_NAME_UNKNOWN,
3677                                  hwsim_mon_setup);
3678         if (hwsim_mon == NULL) {
3679                 err = -ENOMEM;
3680                 goto out_free_radios;
3681         }
3682
3683         rtnl_lock();
3684         err = dev_alloc_name(hwsim_mon, hwsim_mon->name);
3685         if (err < 0) {
3686                 rtnl_unlock();
3687                 goto out_free_radios;
3688         }
3689
3690         err = register_netdevice(hwsim_mon);
3691         if (err < 0) {
3692                 rtnl_unlock();
3693                 goto out_free_mon;
3694         }
3695         rtnl_unlock();
3696
3697         return 0;
3698
3699 out_free_mon:
3700         free_netdev(hwsim_mon);
3701 out_free_radios:
3702         mac80211_hwsim_free();
3703 out_unregister_driver:
3704         platform_driver_unregister(&mac80211_hwsim_driver);
3705 out_unregister_pernet:
3706         unregister_pernet_device(&hwsim_net_ops);
3707 out_free_rht:
3708         rhashtable_destroy(&hwsim_radios_rht);
3709 out_free_wq:
3710         destroy_workqueue(hwsim_wq);
3711         return err;
3712 }
3713 module_init(init_mac80211_hwsim);
3714
3715 static void __exit exit_mac80211_hwsim(void)
3716 {
3717         pr_debug("mac80211_hwsim: unregister radios\n");
3718
3719         hwsim_exit_netlink();
3720
3721         mac80211_hwsim_free();
3722         flush_workqueue(hwsim_wq);
3723
3724         rhashtable_destroy(&hwsim_radios_rht);
3725         unregister_netdev(hwsim_mon);
3726         platform_driver_unregister(&mac80211_hwsim_driver);
3727         unregister_pernet_device(&hwsim_net_ops);
3728         destroy_workqueue(hwsim_wq);
3729 }
3730 module_exit(exit_mac80211_hwsim);