drivers/net/wireless/mac80211_hwsim.c

   1 /*
   2  * mac80211_hwsim - software simulator of 802.11 radio(s) for mac80211
   3  * Copyright (c) 2008, Jouni Malinen <[email protected]>
   4  * Copyright (c) 2011, Javier Lopez <[email protected]>
   5  * Copyright (c) 2016 - 2017 Intel Deutschland GmbH
   6  * Copyright (C) 2018 Intel Corporation
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12
  13 /*
  14  * TODO:
  15  * - Add TSF sync and fix IBSS beacon transmission by adding
  16  *   competition for "air time" at TBTT
  17  * - RX filtering based on filter configuration (data->rx_filter)
  18  */
  19
  20 #include <linux/list.h>
  21 #include <linux/slab.h>
  22 #include <linux/spinlock.h>
  23 #include <net/dst.h>
  24 #include <net/xfrm.h>
  25 #include <net/mac80211.h>
  26 #include <net/ieee80211_radiotap.h>
  27 #include <linux/if_arp.h>
  28 #include <linux/rtnetlink.h>
  29 #include <linux/etherdevice.h>
  30 #include <linux/platform_device.h>
  31 #include <linux/debugfs.h>
  32 #include <linux/module.h>
  33 #include <linux/ktime.h>
  34 #include <net/genetlink.h>
  35 #include <net/net_namespace.h>
  36 #include <net/netns/generic.h>
  37 #include <linux/rhashtable.h>
  38 #include <linux/nospec.h>
  39 #include "mac80211_hwsim.h"
  40
  41 #define WARN_QUEUE 100
  42 #define MAX_QUEUE 200
  43
  44 MODULE_AUTHOR("Jouni Malinen");
  45 MODULE_DESCRIPTION("Software simulator of 802.11 radio(s) for mac80211");
  46 MODULE_LICENSE("GPL");
  47
  48 static int radios = 2;
  49 module_param(radios, int, 0444);
  50 MODULE_PARM_DESC(radios, "Number of simulated radios");
  51
  52 static int channels = 1;
  53 module_param(channels, int, 0444);
  54 MODULE_PARM_DESC(channels, "Number of concurrent channels");
  55
  56 static bool paged_rx = false;
  57 module_param(paged_rx, bool, 0644);
  58 MODULE_PARM_DESC(paged_rx, "Use paged SKBs for RX instead of linear ones");
  59
  60 static bool rctbl = false;
  61 module_param(rctbl, bool, 0444);
  62 MODULE_PARM_DESC(rctbl, "Handle rate control table");
  63
  64 static bool support_p2p_device = true;
  65 module_param(support_p2p_device, bool, 0444);
  66 MODULE_PARM_DESC(support_p2p_device, "Support P2P-Device interface type");
  67
  68 /**
  69  * enum hwsim_regtest - the type of regulatory tests we offer
  70  *
  71  * These are the different values you can use for the regtest
  72  * module parameter. This is useful to help test world roaming
  73  * and the driver regulatory_hint() call and combinations of these.
  74  * If you want to do specific alpha2 regulatory domain tests simply
  75  * use the userspace regulatory request as that will be respected as
  76  * well without the need of this module parameter. This is designed
  77  * only for testing the driver regulatory request, world roaming
  78  * and all possible combinations.
  79  *
  80  * @HWSIM_REGTEST_DISABLED: No regulatory tests are performed,
  81  *      this is the default value.
  82  * @HWSIM_REGTEST_DRIVER_REG_FOLLOW: Used for testing the driver regulatory
  83  *      hint, only one driver regulatory hint will be sent as such the
  84  *      secondary radios are expected to follow.
  85  * @HWSIM_REGTEST_DRIVER_REG_ALL: Used for testing the driver regulatory
  86  *      request with all radios reporting the same regulatory domain.
  87  * @HWSIM_REGTEST_DIFF_COUNTRY: Used for testing the drivers calling
  88  *      different regulatory domains requests. Expected behaviour is for
  89  *      an intersection to occur but each device will still use their
  90  *      respective regulatory requested domains. Subsequent radios will
  91  *      use the resulting intersection.
  92  * @HWSIM_REGTEST_WORLD_ROAM: Used for testing the world roaming. We accomplish
  93  *      this by using a custom beacon-capable regulatory domain for the first
  94  *      radio. All other device world roam.
  95  * @HWSIM_REGTEST_CUSTOM_WORLD: Used for testing the custom world regulatory
  96  *      domain requests. All radios will adhere to this custom world regulatory
  97  *      domain.
  98  * @HWSIM_REGTEST_CUSTOM_WORLD_2: Used for testing 2 custom world regulatory
  99  *      domain requests. The first radio will adhere to the first custom world
 100  *      regulatory domain, the second one to the second custom world regulatory
 101  *      domain. All other devices will world roam.
 102  * @HWSIM_REGTEST_STRICT_FOLLOW_: Used for testing strict regulatory domain
 103  *      settings, only the first radio will send a regulatory domain request
 104  *      and use strict settings. The rest of the radios are expected to follow.
 105  * @HWSIM_REGTEST_STRICT_ALL: Used for testing strict regulatory domain
 106  *      settings. All radios will adhere to this.
 107  * @HWSIM_REGTEST_STRICT_AND_DRIVER_REG: Used for testing strict regulatory
 108  *      domain settings, combined with secondary driver regulatory domain
 109  *      settings. The first radio will get a strict regulatory domain setting
 110  *      using the first driver regulatory request and the second radio will use
 111  *      non-strict settings using the second driver regulatory request. All
 112  *      other devices should follow the intersection created between the
 113  *      first two.
 114  * @HWSIM_REGTEST_ALL: Used for testing every possible mix. You will need
 115  *      at least 6 radios for a complete test. We will test in this order:
 116  *      1 - driver custom world regulatory domain
 117  *      2 - second custom world regulatory domain
 118  *      3 - first driver regulatory domain request
 119  *      4 - second driver regulatory domain request
 120  *      5 - strict regulatory domain settings using the third driver regulatory
 121  *          domain request
 122  *      6 and on - should follow the intersection of the 3rd, 4rth and 5th radio
 123  *                 regulatory requests.
 124  */
 125 enum hwsim_regtest {
 126         HWSIM_REGTEST_DISABLED = 0,
 127         HWSIM_REGTEST_DRIVER_REG_FOLLOW = 1,
 128         HWSIM_REGTEST_DRIVER_REG_ALL = 2,
 129         HWSIM_REGTEST_DIFF_COUNTRY = 3,
 130         HWSIM_REGTEST_WORLD_ROAM = 4,
 131         HWSIM_REGTEST_CUSTOM_WORLD = 5,
 132         HWSIM_REGTEST_CUSTOM_WORLD_2 = 6,
 133         HWSIM_REGTEST_STRICT_FOLLOW = 7,
 134         HWSIM_REGTEST_STRICT_ALL = 8,
 135         HWSIM_REGTEST_STRICT_AND_DRIVER_REG = 9,
 136         HWSIM_REGTEST_ALL = 10,
 137 };
 138
 139 /* Set to one of the HWSIM_REGTEST_* values above */
 140 static int regtest = HWSIM_REGTEST_DISABLED;
 141 module_param(regtest, int, 0444);
 142 MODULE_PARM_DESC(regtest, "The type of regulatory test we want to run");
 143
 144 static const char *hwsim_alpha2s[] = {
 145         "FI",
 146         "AL",
 147         "US",
 148         "DE",
 149         "JP",
 150         "AL",
 151 };
 152
 153 static const struct ieee80211_regdomain hwsim_world_regdom_custom_01 = {
 154         .n_reg_rules = 4,
 155         .alpha2 =  "99",
 156         .reg_rules = {
 157                 REG_RULE(2412-10, 2462+10, 40, 0, 20, 0),
 158                 REG_RULE(2484-10, 2484+10, 40, 0, 20, 0),
 159                 REG_RULE(5150-10, 5240+10, 40, 0, 30, 0),
 160                 REG_RULE(5745-10, 5825+10, 40, 0, 30, 0),
 161         }
 162 };
 163
 164 static const struct ieee80211_regdomain hwsim_world_regdom_custom_02 = {
 165         .n_reg_rules = 2,
 166         .alpha2 =  "99",
 167         .reg_rules = {
 168                 REG_RULE(2412-10, 2462+10, 40, 0, 20, 0),
 169                 REG_RULE(5725-10, 5850+10, 40, 0, 30,
 170                          NL80211_RRF_NO_IR),
 171         }
 172 };
 173
 174 static const struct ieee80211_regdomain *hwsim_world_regdom_custom[] = {
 175         &hwsim_world_regdom_custom_01,
 176         &hwsim_world_regdom_custom_02,
 177 };
 178
 179 struct hwsim_vif_priv {
 180         u32 magic;
 181         u8 bssid[ETH_ALEN];
 182         bool assoc;
 183         bool bcn_en;
 184         u16 aid;
 185 };
 186
 187 #define HWSIM_VIF_MAGIC 0x69537748
 188
 189 static inline void hwsim_check_magic(struct ieee80211_vif *vif)
 190 {
 191         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 192         WARN(vp->magic != HWSIM_VIF_MAGIC,
 193              "Invalid VIF (%p) magic %#x, %pM, %d/%d\n",
 194              vif, vp->magic, vif->addr, vif->type, vif->p2p);
 195 }
 196
 197 static inline void hwsim_set_magic(struct ieee80211_vif *vif)
 198 {
 199         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 200         vp->magic = HWSIM_VIF_MAGIC;
 201 }
 202
 203 static inline void hwsim_clear_magic(struct ieee80211_vif *vif)
 204 {
 205         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 206         vp->magic = 0;
 207 }
 208
 209 struct hwsim_sta_priv {
 210         u32 magic;
 211 };
 212
 213 #define HWSIM_STA_MAGIC 0x6d537749
 214
 215 static inline void hwsim_check_sta_magic(struct ieee80211_sta *sta)
 216 {
 217         struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
 218         WARN_ON(sp->magic != HWSIM_STA_MAGIC);
 219 }
 220
 221 static inline void hwsim_set_sta_magic(struct ieee80211_sta *sta)
 222 {
 223         struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
 224         sp->magic = HWSIM_STA_MAGIC;
 225 }
 226
 227 static inline void hwsim_clear_sta_magic(struct ieee80211_sta *sta)
 228 {
 229         struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
 230         sp->magic = 0;
 231 }
 232
 233 struct hwsim_chanctx_priv {
 234         u32 magic;
 235 };
 236
 237 #define HWSIM_CHANCTX_MAGIC 0x6d53774a
 238
 239 static inline void hwsim_check_chanctx_magic(struct ieee80211_chanctx_conf *c)
 240 {
 241         struct hwsim_chanctx_priv *cp = (void *)c->drv_priv;
 242         WARN_ON(cp->magic != HWSIM_CHANCTX_MAGIC);
 243 }
 244
 245 static inline void hwsim_set_chanctx_magic(struct ieee80211_chanctx_conf *c)
 246 {
 247         struct hwsim_chanctx_priv *cp = (void *)c->drv_priv;
 248         cp->magic = HWSIM_CHANCTX_MAGIC;
 249 }
 250
 251 static inline void hwsim_clear_chanctx_magic(struct ieee80211_chanctx_conf *c)
 252 {
 253         struct hwsim_chanctx_priv *cp = (void *)c->drv_priv;
 254         cp->magic = 0;
 255 }
 256
 257 static unsigned int hwsim_net_id;
 258
 259 static DEFINE_IDA(hwsim_netgroup_ida);
 260
 261 struct hwsim_net {
 262         int netgroup;
 263         u32 wmediumd;
 264 };
 265
 266 static inline int hwsim_net_get_netgroup(struct net *net)
 267 {
 268         struct hwsim_net *hwsim_net = net_generic(net, hwsim_net_id);
 269
 270         return hwsim_net->netgroup;
 271 }
 272
 273 static inline int hwsim_net_set_netgroup(struct net *net)
 274 {
 275         struct hwsim_net *hwsim_net = net_generic(net, hwsim_net_id);
 276
 277         hwsim_net->netgroup = ida_simple_get(&hwsim_netgroup_ida,
 278                                              0, 0, GFP_KERNEL);
 279         return hwsim_net->netgroup >= 0 ? 0 : -ENOMEM;
 280 }
 281
 282 static inline u32 hwsim_net_get_wmediumd(struct net *net)
 283 {
 284         struct hwsim_net *hwsim_net = net_generic(net, hwsim_net_id);
 285
 286         return hwsim_net->wmediumd;
 287 }
 288
 289 static inline void hwsim_net_set_wmediumd(struct net *net, u32 portid)
 290 {
 291         struct hwsim_net *hwsim_net = net_generic(net, hwsim_net_id);
 292
 293         hwsim_net->wmediumd = portid;
 294 }
 295
 296 static struct class *hwsim_class;
 297
 298 static struct net_device *hwsim_mon; /* global monitor netdev */
 299
 300 #define CHAN2G(_freq)  { \
 301         .band = NL80211_BAND_2GHZ, \
 302         .center_freq = (_freq), \
 303         .hw_value = (_freq), \
 304         .max_power = 20, \
 305 }
 306
 307 #define CHAN5G(_freq) { \
 308         .band = NL80211_BAND_5GHZ, \
 309         .center_freq = (_freq), \
 310         .hw_value = (_freq), \
 311         .max_power = 20, \
 312 }
 313
 314 static const struct ieee80211_channel hwsim_channels_2ghz[] = {
 315         CHAN2G(2412), /* Channel 1 */
 316         CHAN2G(2417), /* Channel 2 */
 317         CHAN2G(2422), /* Channel 3 */
 318         CHAN2G(2427), /* Channel 4 */
 319         CHAN2G(2432), /* Channel 5 */
 320         CHAN2G(2437), /* Channel 6 */
 321         CHAN2G(2442), /* Channel 7 */
 322         CHAN2G(2447), /* Channel 8 */
 323         CHAN2G(2452), /* Channel 9 */
 324         CHAN2G(2457), /* Channel 10 */
 325         CHAN2G(2462), /* Channel 11 */
 326         CHAN2G(2467), /* Channel 12 */
 327         CHAN2G(2472), /* Channel 13 */
 328         CHAN2G(2484), /* Channel 14 */
 329 };
 330
 331 static const struct ieee80211_channel hwsim_channels_5ghz[] = {
 332         CHAN5G(5180), /* Channel 36 */
 333         CHAN5G(5200), /* Channel 40 */
 334         CHAN5G(5220), /* Channel 44 */
 335         CHAN5G(5240), /* Channel 48 */
 336
 337         CHAN5G(5260), /* Channel 52 */
 338         CHAN5G(5280), /* Channel 56 */
 339         CHAN5G(5300), /* Channel 60 */
 340         CHAN5G(5320), /* Channel 64 */
 341
 342         CHAN5G(5500), /* Channel 100 */
 343         CHAN5G(5520), /* Channel 104 */
 344         CHAN5G(5540), /* Channel 108 */
 345         CHAN5G(5560), /* Channel 112 */
 346         CHAN5G(5580), /* Channel 116 */
 347         CHAN5G(5600), /* Channel 120 */
 348         CHAN5G(5620), /* Channel 124 */
 349         CHAN5G(5640), /* Channel 128 */
 350         CHAN5G(5660), /* Channel 132 */
 351         CHAN5G(5680), /* Channel 136 */
 352         CHAN5G(5700), /* Channel 140 */
 353
 354         CHAN5G(5745), /* Channel 149 */
 355         CHAN5G(5765), /* Channel 153 */
 356         CHAN5G(5785), /* Channel 157 */
 357         CHAN5G(5805), /* Channel 161 */
 358         CHAN5G(5825), /* Channel 165 */
 359         CHAN5G(5845), /* Channel 169 */
 360 };
 361
 362 static const struct ieee80211_rate hwsim_rates[] = {
 363         { .bitrate = 10 },
 364         { .bitrate = 20, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
 365         { .bitrate = 55, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
 366         { .bitrate = 110, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
 367         { .bitrate = 60 },
 368         { .bitrate = 90 },
 369         { .bitrate = 120 },
 370         { .bitrate = 180 },
 371         { .bitrate = 240 },
 372         { .bitrate = 360 },
 373         { .bitrate = 480 },
 374         { .bitrate = 540 }
 375 };
 376
 377 #define OUI_QCA 0x001374
 378 #define QCA_NL80211_SUBCMD_TEST 1
 379 enum qca_nl80211_vendor_subcmds {
 380         QCA_WLAN_VENDOR_ATTR_TEST = 8,
 381         QCA_WLAN_VENDOR_ATTR_MAX = QCA_WLAN_VENDOR_ATTR_TEST
 382 };
 383
 384 static const struct nla_policy
 385 hwsim_vendor_test_policy[QCA_WLAN_VENDOR_ATTR_MAX + 1] = {
 386         [QCA_WLAN_VENDOR_ATTR_MAX] = { .type = NLA_U32 },
 387 };
 388
 389 static int mac80211_hwsim_vendor_cmd_test(struct wiphy *wiphy,
 390                                           struct wireless_dev *wdev,
 391                                           const void *data, int data_len)
 392 {
 393         struct sk_buff *skb;
 394         struct nlattr *tb[QCA_WLAN_VENDOR_ATTR_MAX + 1];
 395         int err;
 396         u32 val;
 397
 398         err = nla_parse(tb, QCA_WLAN_VENDOR_ATTR_MAX, data, data_len,
 399                         hwsim_vendor_test_policy, NULL);
 400         if (err)
 401                 return err;
 402         if (!tb[QCA_WLAN_VENDOR_ATTR_TEST])
 403                 return -EINVAL;
 404         val = nla_get_u32(tb[QCA_WLAN_VENDOR_ATTR_TEST]);
 405         wiphy_dbg(wiphy, "%s: test=%u\n", __func__, val);
 406
 407         /* Send a vendor event as a test. Note that this would not normally be
 408          * done within a command handler, but rather, based on some other
 409          * trigger. For simplicity, this command is used to trigger the event
 410          * here.
 411          *
 412          * event_idx = 0 (index in mac80211_hwsim_vendor_commands)
 413          */
 414         skb = cfg80211_vendor_event_alloc(wiphy, wdev, 100, 0, GFP_KERNEL);
 415         if (skb) {
 416                 /* skb_put() or nla_put() will fill up data within
 417                  * NL80211_ATTR_VENDOR_DATA.
 418                  */
 419
 420                 /* Add vendor data */
 421                 nla_put_u32(skb, QCA_WLAN_VENDOR_ATTR_TEST, val + 1);
 422
 423                 /* Send the event - this will call nla_nest_end() */
 424                 cfg80211_vendor_event(skb, GFP_KERNEL);
 425         }
 426
 427         /* Send a response to the command */
 428         skb = cfg80211_vendor_cmd_alloc_reply_skb(wiphy, 10);
 429         if (!skb)
 430                 return -ENOMEM;
 431
 432         /* skb_put() or nla_put() will fill up data within
 433          * NL80211_ATTR_VENDOR_DATA
 434          */
 435         nla_put_u32(skb, QCA_WLAN_VENDOR_ATTR_TEST, val + 2);
 436
 437         return cfg80211_vendor_cmd_reply(skb);
 438 }
 439
 440 static struct wiphy_vendor_command mac80211_hwsim_vendor_commands[] = {
 441         {
 442                 .info = { .vendor_id = OUI_QCA,
 443                           .subcmd = QCA_NL80211_SUBCMD_TEST },
 444                 .flags = WIPHY_VENDOR_CMD_NEED_NETDEV,
 445                 .doit = mac80211_hwsim_vendor_cmd_test,
 446         }
 447 };
 448
 449 /* Advertise support vendor specific events */
 450 static const struct nl80211_vendor_cmd_info mac80211_hwsim_vendor_events[] = {
 451         { .vendor_id = OUI_QCA, .subcmd = 1 },
 452 };
 453
 454 static const struct ieee80211_iface_limit hwsim_if_limits[] = {
 455         { .max = 1, .types = BIT(NL80211_IFTYPE_ADHOC) },
 456         { .max = 2048,  .types = BIT(NL80211_IFTYPE_STATION) |
 457                                  BIT(NL80211_IFTYPE_P2P_CLIENT) |
 458 #ifdef CONFIG_MAC80211_MESH
 459                                  BIT(NL80211_IFTYPE_MESH_POINT) |
 460 #endif
 461                                  BIT(NL80211_IFTYPE_AP) |
 462                                  BIT(NL80211_IFTYPE_P2P_GO) },
 463         /* must be last, see hwsim_if_comb */
 464         { .max = 1, .types = BIT(NL80211_IFTYPE_P2P_DEVICE) }
 465 };
 466
 467 static const struct ieee80211_iface_combination hwsim_if_comb[] = {
 468         {
 469                 .limits = hwsim_if_limits,
 470                 /* remove the last entry which is P2P_DEVICE */
 471                 .n_limits = ARRAY_SIZE(hwsim_if_limits) - 1,
 472                 .max_interfaces = 2048,
 473                 .num_different_channels = 1,
 474                 .radar_detect_widths = BIT(NL80211_CHAN_WIDTH_20_NOHT) |
 475                                        BIT(NL80211_CHAN_WIDTH_20) |
 476                                        BIT(NL80211_CHAN_WIDTH_40) |
 477                                        BIT(NL80211_CHAN_WIDTH_80) |
 478                                        BIT(NL80211_CHAN_WIDTH_160),
 479         },
 480 };
 481
 482 static const struct ieee80211_iface_combination hwsim_if_comb_p2p_dev[] = {
 483         {
 484                 .limits = hwsim_if_limits,
 485                 .n_limits = ARRAY_SIZE(hwsim_if_limits),
 486                 .max_interfaces = 2048,
 487                 .num_different_channels = 1,
 488                 .radar_detect_widths = BIT(NL80211_CHAN_WIDTH_20_NOHT) |
 489                                        BIT(NL80211_CHAN_WIDTH_20) |
 490                                        BIT(NL80211_CHAN_WIDTH_40) |
 491                                        BIT(NL80211_CHAN_WIDTH_80) |
 492                                        BIT(NL80211_CHAN_WIDTH_160),
 493         },
 494 };
 495
 496 static spinlock_t hwsim_radio_lock;
 497 static LIST_HEAD(hwsim_radios);
 498 static struct rhashtable hwsim_radios_rht;
 499 static int hwsim_radio_idx;
 500 static int hwsim_radios_generation = 1;
 501
 502 static struct platform_driver mac80211_hwsim_driver = {
 503         .driver = {
 504                 .name = "mac80211_hwsim",
 505         },
 506 };
 507
 508 struct mac80211_hwsim_data {
 509         struct list_head list;
 510         struct rhash_head rht;
 511         struct ieee80211_hw *hw;
 512         struct device *dev;
 513         struct ieee80211_supported_band bands[NUM_NL80211_BANDS];
 514         struct ieee80211_channel channels_2ghz[ARRAY_SIZE(hwsim_channels_2ghz)];
 515         struct ieee80211_channel channels_5ghz[ARRAY_SIZE(hwsim_channels_5ghz)];
 516         struct ieee80211_rate rates[ARRAY_SIZE(hwsim_rates)];
 517         struct ieee80211_iface_combination if_combination;
 518
 519         struct mac_address addresses[2];
 520         int channels, idx;
 521         bool use_chanctx;
 522         bool destroy_on_close;
 523         u32 portid;
 524         char alpha2[2];
 525         const struct ieee80211_regdomain *regd;
 526
 527         struct ieee80211_channel *tmp_chan;
 528         struct ieee80211_channel *roc_chan;
 529         u32 roc_duration;
 530         struct delayed_work roc_start;
 531         struct delayed_work roc_done;
 532         struct delayed_work hw_scan;
 533         struct cfg80211_scan_request *hw_scan_request;
 534         struct ieee80211_vif *hw_scan_vif;
 535         int scan_chan_idx;
 536         u8 scan_addr[ETH_ALEN];
 537         struct {
 538                 struct ieee80211_channel *channel;
 539                 unsigned long next_start, start, end;
 540         } survey_data[ARRAY_SIZE(hwsim_channels_2ghz) +
 541                       ARRAY_SIZE(hwsim_channels_5ghz)];
 542
 543         struct ieee80211_channel *channel;
 544         u64 beacon_int  /* beacon interval in us */;
 545         unsigned int rx_filter;
 546         bool started, idle, scanning;
 547         struct mutex mutex;
 548         struct tasklet_hrtimer beacon_timer;
 549         enum ps_mode {
 550                 PS_DISABLED, PS_ENABLED, PS_AUTO_POLL, PS_MANUAL_POLL
 551         } ps;
 552         bool ps_poll_pending;
 553         struct dentry *debugfs;
 554
 555         uintptr_t pending_cookie;
 556         struct sk_buff_head pending;    /* packets pending */
 557         /*
 558          * Only radios in the same group can communicate together (the
 559          * channel has to match too). Each bit represents a group. A
 560          * radio can be in more than one group.
 561          */
 562         u64 group;
 563
 564         /* group shared by radios created in the same netns */
 565         int netgroup;
 566         /* wmediumd portid responsible for netgroup of this radio */
 567         u32 wmediumd;
 568
 569         /* difference between this hw's clock and the real clock, in usecs */
 570         s64 tsf_offset;
 571         s64 bcn_delta;
 572         /* absolute beacon transmission time. Used to cover up "tx" delay. */
 573         u64 abs_bcn_ts;
 574
 575         /* Stats */
 576         u64 tx_pkts;
 577         u64 rx_pkts;
 578         u64 tx_bytes;
 579         u64 rx_bytes;
 580         u64 tx_dropped;
 581         u64 tx_failed;
 582 };
 583
 584 static const struct rhashtable_params hwsim_rht_params = {
 585         .nelem_hint = 2,
 586         .automatic_shrinking = true,
 587         .key_len = ETH_ALEN,
 588         .key_offset = offsetof(struct mac80211_hwsim_data, addresses[1]),
 589         .head_offset = offsetof(struct mac80211_hwsim_data, rht),
 590 };
 591
 592 struct hwsim_radiotap_hdr {
 593         struct ieee80211_radiotap_header hdr;
 594         __le64 rt_tsft;
 595         u8 rt_flags;
 596         u8 rt_rate;
 597         __le16 rt_channel;
 598         __le16 rt_chbitmask;
 599 } __packed;
 600
 601 struct hwsim_radiotap_ack_hdr {
 602         struct ieee80211_radiotap_header hdr;
 603         u8 rt_flags;
 604         u8 pad;
 605         __le16 rt_channel;
 606         __le16 rt_chbitmask;
 607 } __packed;
 608
 609 /* MAC80211_HWSIM netlink family */
 610 static struct genl_family hwsim_genl_family;
 611
 612 enum hwsim_multicast_groups {
 613         HWSIM_MCGRP_CONFIG,
 614 };
 615
 616 static const struct genl_multicast_group hwsim_mcgrps[] = {
 617         [HWSIM_MCGRP_CONFIG] = { .name = "config", },
 618 };
 619
 620 /* MAC80211_HWSIM netlink policy */
 621
 622 static const struct nla_policy hwsim_genl_policy[HWSIM_ATTR_MAX + 1] = {
 623         [HWSIM_ATTR_ADDR_RECEIVER] = { .type = NLA_UNSPEC, .len = ETH_ALEN },
 624         [HWSIM_ATTR_ADDR_TRANSMITTER] = { .type = NLA_UNSPEC, .len = ETH_ALEN },
 625         [HWSIM_ATTR_FRAME] = { .type = NLA_BINARY,
 626                                .len = IEEE80211_MAX_DATA_LEN },
 627         [HWSIM_ATTR_FLAGS] = { .type = NLA_U32 },
 628         [HWSIM_ATTR_RX_RATE] = { .type = NLA_U32 },
 629         [HWSIM_ATTR_SIGNAL] = { .type = NLA_U32 },
 630         [HWSIM_ATTR_TX_INFO] = { .type = NLA_UNSPEC,
 631                                  .len = IEEE80211_TX_MAX_RATES *
 632                                         sizeof(struct hwsim_tx_rate)},
 633         [HWSIM_ATTR_COOKIE] = { .type = NLA_U64 },
 634         [HWSIM_ATTR_CHANNELS] = { .type = NLA_U32 },
 635         [HWSIM_ATTR_RADIO_ID] = { .type = NLA_U32 },
 636         [HWSIM_ATTR_REG_HINT_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 637         [HWSIM_ATTR_REG_CUSTOM_REG] = { .type = NLA_U32 },
 638         [HWSIM_ATTR_REG_STRICT_REG] = { .type = NLA_FLAG },
 639         [HWSIM_ATTR_SUPPORT_P2P_DEVICE] = { .type = NLA_FLAG },
 640         [HWSIM_ATTR_DESTROY_RADIO_ON_CLOSE] = { .type = NLA_FLAG },
 641         [HWSIM_ATTR_RADIO_NAME] = { .type = NLA_STRING },
 642         [HWSIM_ATTR_NO_VIF] = { .type = NLA_FLAG },
 643         [HWSIM_ATTR_FREQ] = { .type = NLA_U32 },
 644         [HWSIM_ATTR_PERM_ADDR] = { .type = NLA_UNSPEC, .len = ETH_ALEN },
 645 };
 646
 647 static void mac80211_hwsim_tx_frame(struct ieee80211_hw *hw,
 648                                     struct sk_buff *skb,
 649                                     struct ieee80211_channel *chan);
 650
 651 /* sysfs attributes */
 652 static void hwsim_send_ps_poll(void *dat, u8 *mac, struct ieee80211_vif *vif)
 653 {
 654         struct mac80211_hwsim_data *data = dat;
 655         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 656         struct sk_buff *skb;
 657         struct ieee80211_pspoll *pspoll;
 658
 659         if (!vp->assoc)
 660                 return;
 661
 662         wiphy_dbg(data->hw->wiphy,
 663                   "%s: send PS-Poll to %pM for aid %d\n",
 664                   __func__, vp->bssid, vp->aid);
 665
 666         skb = dev_alloc_skb(sizeof(*pspoll));
 667         if (!skb)
 668                 return;
 669         pspoll = skb_put(skb, sizeof(*pspoll));
 670         pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
 671                                             IEEE80211_STYPE_PSPOLL |
 672                                             IEEE80211_FCTL_PM);
 673         pspoll->aid = cpu_to_le16(0xc000 | vp->aid);
 674         memcpy(pspoll->bssid, vp->bssid, ETH_ALEN);
 675         memcpy(pspoll->ta, mac, ETH_ALEN);
 676
 677         rcu_read_lock();
 678         mac80211_hwsim_tx_frame(data->hw, skb,
 679                                 rcu_dereference(vif->chanctx_conf)->def.chan);
 680         rcu_read_unlock();
 681 }
 682
 683 static void hwsim_send_nullfunc(struct mac80211_hwsim_data *data, u8 *mac,
 684                                 struct ieee80211_vif *vif, int ps)
 685 {
 686         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 687         struct sk_buff *skb;
 688         struct ieee80211_hdr *hdr;
 689
 690         if (!vp->assoc)
 691                 return;
 692
 693         wiphy_dbg(data->hw->wiphy,
 694                   "%s: send data::nullfunc to %pM ps=%d\n",
 695                   __func__, vp->bssid, ps);
 696
 697         skb = dev_alloc_skb(sizeof(*hdr));
 698         if (!skb)
 699                 return;
 700         hdr = skb_put(skb, sizeof(*hdr) - ETH_ALEN);
 701         hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
 702                                          IEEE80211_STYPE_NULLFUNC |
 703                                          IEEE80211_FCTL_TODS |
 704                                          (ps ? IEEE80211_FCTL_PM : 0));
 705         hdr->duration_id = cpu_to_le16(0);
 706         memcpy(hdr->addr1, vp->bssid, ETH_ALEN);
 707         memcpy(hdr->addr2, mac, ETH_ALEN);
 708         memcpy(hdr->addr3, vp->bssid, ETH_ALEN);
 709
 710         rcu_read_lock();
 711         mac80211_hwsim_tx_frame(data->hw, skb,
 712                                 rcu_dereference(vif->chanctx_conf)->def.chan);
 713         rcu_read_unlock();
 714 }
 715
 716
 717 static void hwsim_send_nullfunc_ps(void *dat, u8 *mac,
 718                                    struct ieee80211_vif *vif)
 719 {
 720         struct mac80211_hwsim_data *data = dat;
 721         hwsim_send_nullfunc(data, mac, vif, 1);
 722 }
 723
 724 static void hwsim_send_nullfunc_no_ps(void *dat, u8 *mac,
 725                                       struct ieee80211_vif *vif)
 726 {
 727         struct mac80211_hwsim_data *data = dat;
 728         hwsim_send_nullfunc(data, mac, vif, 0);
 729 }
 730
 731 static int hwsim_fops_ps_read(void *dat, u64 *val)
 732 {
 733         struct mac80211_hwsim_data *data = dat;
 734         *val = data->ps;
 735         return 0;
 736 }
 737
 738 static int hwsim_fops_ps_write(void *dat, u64 val)
 739 {
 740         struct mac80211_hwsim_data *data = dat;
 741         enum ps_mode old_ps;
 742
 743         if (val != PS_DISABLED && val != PS_ENABLED && val != PS_AUTO_POLL &&
 744             val != PS_MANUAL_POLL)
 745                 return -EINVAL;
 746
 747         if (val == PS_MANUAL_POLL) {
 748                 if (data->ps != PS_ENABLED)
 749                         return -EINVAL;
 750                 local_bh_disable();
 751                 ieee80211_iterate_active_interfaces_atomic(
 752                         data->hw, IEEE80211_IFACE_ITER_NORMAL,
 753                         hwsim_send_ps_poll, data);
 754                 local_bh_enable();
 755                 return 0;
 756         }
 757         old_ps = data->ps;
 758         data->ps = val;
 759
 760         local_bh_disable();
 761         if (old_ps == PS_DISABLED && val != PS_DISABLED) {
 762                 ieee80211_iterate_active_interfaces_atomic(
 763                         data->hw, IEEE80211_IFACE_ITER_NORMAL,
 764                         hwsim_send_nullfunc_ps, data);
 765         } else if (old_ps != PS_DISABLED && val == PS_DISABLED) {
 766                 ieee80211_iterate_active_interfaces_atomic(
 767                         data->hw, IEEE80211_IFACE_ITER_NORMAL,
 768                         hwsim_send_nullfunc_no_ps, data);
 769         }
 770         local_bh_enable();
 771
 772         return 0;
 773 }
 774
 775 DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_ps, hwsim_fops_ps_read, hwsim_fops_ps_write,
 776                         "%llu\n");
 777
 778 static int hwsim_write_simulate_radar(void *dat, u64 val)
 779 {
 780         struct mac80211_hwsim_data *data = dat;
 781
 782         ieee80211_radar_detected(data->hw);
 783
 784         return 0;
 785 }
 786
 787 DEFINE_SIMPLE_ATTRIBUTE(hwsim_simulate_radar, NULL,
 788                         hwsim_write_simulate_radar, "%llu\n");
 789
 790 static int hwsim_fops_group_read(void *dat, u64 *val)
 791 {
 792         struct mac80211_hwsim_data *data = dat;
 793         *val = data->group;
 794         return 0;
 795 }
 796
 797 static int hwsim_fops_group_write(void *dat, u64 val)
 798 {
 799         struct mac80211_hwsim_data *data = dat;
 800         data->group = val;
 801         return 0;
 802 }
 803
 804 DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_group,
 805                         hwsim_fops_group_read, hwsim_fops_group_write,
 806                         "%llx\n");
 807
 808 static netdev_tx_t hwsim_mon_xmit(struct sk_buff *skb,
 809                                         struct net_device *dev)
 810 {
 811         /* TODO: allow packet injection */
 812         dev_kfree_skb(skb);
 813         return NETDEV_TX_OK;
 814 }
 815
 816 static inline u64 mac80211_hwsim_get_tsf_raw(void)
 817 {
 818         return ktime_to_us(ktime_get_real());
 819 }
 820
 821 static __le64 __mac80211_hwsim_get_tsf(struct mac80211_hwsim_data *data)
 822 {
 823         u64 now = mac80211_hwsim_get_tsf_raw();
 824         return cpu_to_le64(now + data->tsf_offset);
 825 }
 826
 827 static u64 mac80211_hwsim_get_tsf(struct ieee80211_hw *hw,
 828                                   struct ieee80211_vif *vif)
 829 {
 830         struct mac80211_hwsim_data *data = hw->priv;
 831         return le64_to_cpu(__mac80211_hwsim_get_tsf(data));
 832 }
 833
 834 static void mac80211_hwsim_set_tsf(struct ieee80211_hw *hw,
 835                 struct ieee80211_vif *vif, u64 tsf)
 836 {
 837         struct mac80211_hwsim_data *data = hw->priv;
 838         u64 now = mac80211_hwsim_get_tsf(hw, vif);
 839         u32 bcn_int = data->beacon_int;
 840         u64 delta = abs(tsf - now);
 841
 842         /* adjust after beaconing with new timestamp at old TBTT */
 843         if (tsf > now) {
 844                 data->tsf_offset += delta;
 845                 data->bcn_delta = do_div(delta, bcn_int);
 846         } else {
 847                 data->tsf_offset -= delta;
 848                 data->bcn_delta = -(s64)do_div(delta, bcn_int);
 849         }
 850 }
 851
 852 static void mac80211_hwsim_monitor_rx(struct ieee80211_hw *hw,
 853                                       struct sk_buff *tx_skb,
 854                                       struct ieee80211_channel *chan)
 855 {
 856         struct mac80211_hwsim_data *data = hw->priv;
 857         struct sk_buff *skb;
 858         struct hwsim_radiotap_hdr *hdr;
 859         u16 flags;
 860         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_skb);
 861         struct ieee80211_rate *txrate = ieee80211_get_tx_rate(hw, info);
 862
 863         if (WARN_ON(!txrate))
 864                 return;
 865
 866         if (!netif_running(hwsim_mon))
 867                 return;
 868
 869         skb = skb_copy_expand(tx_skb, sizeof(*hdr), 0, GFP_ATOMIC);
 870         if (skb == NULL)
 871                 return;
 872
 873         hdr = skb_push(skb, sizeof(*hdr));
 874         hdr->hdr.it_version = PKTHDR_RADIOTAP_VERSION;
 875         hdr->hdr.it_pad = 0;
 876         hdr->hdr.it_len = cpu_to_le16(sizeof(*hdr));
 877         hdr->hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
 878                                           (1 << IEEE80211_RADIOTAP_RATE) |
 879                                           (1 << IEEE80211_RADIOTAP_TSFT) |
 880                                           (1 << IEEE80211_RADIOTAP_CHANNEL));
 881         hdr->rt_tsft = __mac80211_hwsim_get_tsf(data);
 882         hdr->rt_flags = 0;
 883         hdr->rt_rate = txrate->bitrate / 5;
 884         hdr->rt_channel = cpu_to_le16(chan->center_freq);
 885         flags = IEEE80211_CHAN_2GHZ;
 886         if (txrate->flags & IEEE80211_RATE_ERP_G)
 887                 flags |= IEEE80211_CHAN_OFDM;
 888         else
 889                 flags |= IEEE80211_CHAN_CCK;
 890         hdr->rt_chbitmask = cpu_to_le16(flags);
 891
 892         skb->dev = hwsim_mon;
 893         skb_reset_mac_header(skb);
 894         skb->ip_summed = CHECKSUM_UNNECESSARY;
 895         skb->pkt_type = PACKET_OTHERHOST;
 896         skb->protocol = htons(ETH_P_802_2);
 897         memset(skb->cb, 0, sizeof(skb->cb));
 898         netif_rx(skb);
 899 }
 900
 901
 902 static void mac80211_hwsim_monitor_ack(struct ieee80211_channel *chan,
 903                                        const u8 *addr)
 904 {
 905         struct sk_buff *skb;
 906         struct hwsim_radiotap_ack_hdr *hdr;
 907         u16 flags;
 908         struct ieee80211_hdr *hdr11;
 909
 910         if (!netif_running(hwsim_mon))
 911                 return;
 912
 913         skb = dev_alloc_skb(100);
 914         if (skb == NULL)
 915                 return;
 916
 917         hdr = skb_put(skb, sizeof(*hdr));
 918         hdr->hdr.it_version = PKTHDR_RADIOTAP_VERSION;
 919         hdr->hdr.it_pad = 0;
 920         hdr->hdr.it_len = cpu_to_le16(sizeof(*hdr));
 921         hdr->hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
 922                                           (1 << IEEE80211_RADIOTAP_CHANNEL));
 923         hdr->rt_flags = 0;
 924         hdr->pad = 0;
 925         hdr->rt_channel = cpu_to_le16(chan->center_freq);
 926         flags = IEEE80211_CHAN_2GHZ;
 927         hdr->rt_chbitmask = cpu_to_le16(flags);
 928
 929         hdr11 = skb_put(skb, 10);
 930         hdr11->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
 931                                            IEEE80211_STYPE_ACK);
 932         hdr11->duration_id = cpu_to_le16(0);
 933         memcpy(hdr11->addr1, addr, ETH_ALEN);
 934
 935         skb->dev = hwsim_mon;
 936         skb_reset_mac_header(skb);
 937         skb->ip_summed = CHECKSUM_UNNECESSARY;
 938         skb->pkt_type = PACKET_OTHERHOST;
 939         skb->protocol = htons(ETH_P_802_2);
 940         memset(skb->cb, 0, sizeof(skb->cb));
 941         netif_rx(skb);
 942 }
 943
 944 struct mac80211_hwsim_addr_match_data {
 945         u8 addr[ETH_ALEN];
 946         bool ret;
 947 };
 948
 949 static void mac80211_hwsim_addr_iter(void *data, u8 *mac,
 950                                      struct ieee80211_vif *vif)
 951 {
 952         struct mac80211_hwsim_addr_match_data *md = data;
 953
 954         if (memcmp(mac, md->addr, ETH_ALEN) == 0)
 955                 md->ret = true;
 956 }
 957
 958 static bool mac80211_hwsim_addr_match(struct mac80211_hwsim_data *data,
 959                                       const u8 *addr)
 960 {
 961         struct mac80211_hwsim_addr_match_data md = {
 962                 .ret = false,
 963         };
 964
 965         if (data->scanning && memcmp(addr, data->scan_addr, ETH_ALEN) == 0)
 966                 return true;
 967
 968         memcpy(md.addr, addr, ETH_ALEN);
 969
 970         ieee80211_iterate_active_interfaces_atomic(data->hw,
 971                                                    IEEE80211_IFACE_ITER_NORMAL,
 972                                                    mac80211_hwsim_addr_iter,
 973                                                    &md);
 974
 975         return md.ret;
 976 }
 977
 978 static bool hwsim_ps_rx_ok(struct mac80211_hwsim_data *data,
 979                            struct sk_buff *skb)
 980 {
 981         switch (data->ps) {
 982         case PS_DISABLED:
 983                 return true;
 984         case PS_ENABLED:
 985                 return false;
 986         case PS_AUTO_POLL:
 987                 /* TODO: accept (some) Beacons by default and other frames only
 988                  * if pending PS-Poll has been sent */
 989                 return true;
 990         case PS_MANUAL_POLL:
 991                 /* Allow unicast frames to own address if there is a pending
 992                  * PS-Poll */
 993                 if (data->ps_poll_pending &&
 994                     mac80211_hwsim_addr_match(data, skb->data + 4)) {
 995                         data->ps_poll_pending = false;
 996                         return true;
 997                 }
 998                 return false;
 999         }
1000
1001         return true;
1002 }
1003
1004 static int hwsim_unicast_netgroup(struct mac80211_hwsim_data *data,
1005                                   struct sk_buff *skb, int portid)
1006 {
1007         struct net *net;
1008         bool found = false;
1009         int res = -ENOENT;
1010
1011         rcu_read_lock();
1012         for_each_net_rcu(net) {
1013                 if (data->netgroup == hwsim_net_get_netgroup(net)) {
1014                         res = genlmsg_unicast(net, skb, portid);
1015                         found = true;
1016                         break;
1017                 }
1018         }
1019         rcu_read_unlock();
1020
1021         if (!found)
1022                 nlmsg_free(skb);
1023
1024         return res;
1025 }
1026
1027 static inline u16 trans_tx_rate_flags_ieee2hwsim(struct ieee80211_tx_rate *rate)
1028 {
1029         u16 result = 0;
1030
1031         if (rate->flags & IEEE80211_TX_RC_USE_RTS_CTS)
1032                 result |= MAC80211_HWSIM_TX_RC_USE_RTS_CTS;
1033         if (rate->flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
1034                 result |= MAC80211_HWSIM_TX_RC_USE_CTS_PROTECT;
1035         if (rate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
1036                 result |= MAC80211_HWSIM_TX_RC_USE_SHORT_PREAMBLE;
1037         if (rate->flags & IEEE80211_TX_RC_MCS)
1038                 result |= MAC80211_HWSIM_TX_RC_MCS;
1039         if (rate->flags & IEEE80211_TX_RC_GREEN_FIELD)
1040                 result |= MAC80211_HWSIM_TX_RC_GREEN_FIELD;
1041         if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
1042                 result |= MAC80211_HWSIM_TX_RC_40_MHZ_WIDTH;
1043         if (rate->flags & IEEE80211_TX_RC_DUP_DATA)
1044                 result |= MAC80211_HWSIM_TX_RC_DUP_DATA;
1045         if (rate->flags & IEEE80211_TX_RC_SHORT_GI)
1046                 result |= MAC80211_HWSIM_TX_RC_SHORT_GI;
1047         if (rate->flags & IEEE80211_TX_RC_VHT_MCS)
1048                 result |= MAC80211_HWSIM_TX_RC_VHT_MCS;
1049         if (rate->flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
1050                 result |= MAC80211_HWSIM_TX_RC_80_MHZ_WIDTH;
1051         if (rate->flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
1052                 result |= MAC80211_HWSIM_TX_RC_160_MHZ_WIDTH;
1053
1054         return result;
1055 }
1056
1057 static void mac80211_hwsim_tx_frame_nl(struct ieee80211_hw *hw,
1058                                        struct sk_buff *my_skb,
1059                                        int dst_portid)
1060 {
1061         struct sk_buff *skb;
1062         struct mac80211_hwsim_data *data = hw->priv;
1063         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) my_skb->data;
1064         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(my_skb);
1065         void *msg_head;
1066         unsigned int hwsim_flags = 0;
1067         int i;
1068         struct hwsim_tx_rate tx_attempts[IEEE80211_TX_MAX_RATES];
1069         struct hwsim_tx_rate_flag tx_attempts_flags[IEEE80211_TX_MAX_RATES];
1070         uintptr_t cookie;
1071
1072         if (data->ps != PS_DISABLED)
1073                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1074         /* If the queue contains MAX_QUEUE skb's drop some */
1075         if (skb_queue_len(&data->pending) >= MAX_QUEUE) {
1076                 /* Droping until WARN_QUEUE level */
1077                 while (skb_queue_len(&data->pending) >= WARN_QUEUE) {
1078                         ieee80211_free_txskb(hw, skb_dequeue(&data->pending));
1079                         data->tx_dropped++;
1080                 }
1081         }
1082
1083         skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1084         if (skb == NULL)
1085                 goto nla_put_failure;
1086
1087         msg_head = genlmsg_put(skb, 0, 0, &hwsim_genl_family, 0,
1088                                HWSIM_CMD_FRAME);
1089         if (msg_head == NULL) {
1090                 pr_debug("mac80211_hwsim: problem with msg_head\n");
1091                 goto nla_put_failure;
1092         }
1093
1094         if (nla_put(skb, HWSIM_ATTR_ADDR_TRANSMITTER,
1095                     ETH_ALEN, data->addresses[1].addr))
1096                 goto nla_put_failure;
1097
1098         /* We get the skb->data */
1099         if (nla_put(skb, HWSIM_ATTR_FRAME, my_skb->len, my_skb->data))
1100                 goto nla_put_failure;
1101
1102         /* We get the flags for this transmission, and we translate them to
1103            wmediumd flags  */
1104
1105         if (info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS)
1106                 hwsim_flags |= HWSIM_TX_CTL_REQ_TX_STATUS;
1107
1108         if (info->flags & IEEE80211_TX_CTL_NO_ACK)
1109                 hwsim_flags |= HWSIM_TX_CTL_NO_ACK;
1110
1111         if (nla_put_u32(skb, HWSIM_ATTR_FLAGS, hwsim_flags))
1112                 goto nla_put_failure;
1113
1114         if (nla_put_u32(skb, HWSIM_ATTR_FREQ, data->channel->center_freq))
1115                 goto nla_put_failure;
1116
1117         /* We get the tx control (rate and retries) info*/
1118
1119         for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
1120                 tx_attempts[i].idx = info->status.rates[i].idx;
1121                 tx_attempts_flags[i].idx = info->status.rates[i].idx;
1122                 tx_attempts[i].count = info->status.rates[i].count;
1123                 tx_attempts_flags[i].flags =
1124                                 trans_tx_rate_flags_ieee2hwsim(
1125                                                 &info->status.rates[i]);
1126         }
1127
1128         if (nla_put(skb, HWSIM_ATTR_TX_INFO,
1129                     sizeof(struct hwsim_tx_rate)*IEEE80211_TX_MAX_RATES,
1130                     tx_attempts))
1131                 goto nla_put_failure;
1132
1133         if (nla_put(skb, HWSIM_ATTR_TX_INFO_FLAGS,
1134                     sizeof(struct hwsim_tx_rate_flag) * IEEE80211_TX_MAX_RATES,
1135                     tx_attempts_flags))
1136                 goto nla_put_failure;
1137
1138         /* We create a cookie to identify this skb */
1139         data->pending_cookie++;
1140         cookie = data->pending_cookie;
1141         info->rate_driver_data[0] = (void *)cookie;
1142         if (nla_put_u64_64bit(skb, HWSIM_ATTR_COOKIE, cookie, HWSIM_ATTR_PAD))
1143                 goto nla_put_failure;
1144
1145         genlmsg_end(skb, msg_head);
1146         if (hwsim_unicast_netgroup(data, skb, dst_portid))
1147                 goto err_free_txskb;
1148
1149         /* Enqueue the packet */
1150         skb_queue_tail(&data->pending, my_skb);
1151         data->tx_pkts++;
1152         data->tx_bytes += my_skb->len;
1153         return;
1154
1155 nla_put_failure:
1156         nlmsg_free(skb);
1157 err_free_txskb:
1158         pr_debug("mac80211_hwsim: error occurred in %s\n", __func__);
1159         ieee80211_free_txskb(hw, my_skb);
1160         data->tx_failed++;
1161 }
1162
1163 static bool hwsim_chans_compat(struct ieee80211_channel *c1,
1164                                struct ieee80211_channel *c2)
1165 {
1166         if (!c1 || !c2)
1167                 return false;
1168
1169         return c1->center_freq == c2->center_freq;
1170 }
1171
1172 struct tx_iter_data {
1173         struct ieee80211_channel *channel;
1174         bool receive;
1175 };
1176
1177 static void mac80211_hwsim_tx_iter(void *_data, u8 *addr,
1178                                    struct ieee80211_vif *vif)
1179 {
1180         struct tx_iter_data *data = _data;
1181
1182         if (!vif->chanctx_conf)
1183                 return;
1184
1185         if (!hwsim_chans_compat(data->channel,
1186                                 rcu_dereference(vif->chanctx_conf)->def.chan))
1187                 return;
1188
1189         data->receive = true;
1190 }
1191
1192 static void mac80211_hwsim_add_vendor_rtap(struct sk_buff *skb)
1193 {
1194         /*
1195          * To enable this code, #define the HWSIM_RADIOTAP_OUI,
1196          * e.g. like this:
1197          * #define HWSIM_RADIOTAP_OUI "\x02\x00\x00"
1198          * (but you should use a valid OUI, not that)
1199          *
1200          * If anyone wants to 'donate' a radiotap OUI/subns code
1201          * please send a patch removing this #ifdef and changing
1202          * the values accordingly.
1203          */
1204 #ifdef HWSIM_RADIOTAP_OUI
1205         struct ieee80211_vendor_radiotap *rtap;
1206
1207         /*
1208          * Note that this code requires the headroom in the SKB
1209          * that was allocated earlier.
1210          */
1211         rtap = skb_push(skb, sizeof(*rtap) + 8 + 4);
1212         rtap->oui[0] = HWSIM_RADIOTAP_OUI[0];
1213         rtap->oui[1] = HWSIM_RADIOTAP_OUI[1];
1214         rtap->oui[2] = HWSIM_RADIOTAP_OUI[2];
1215         rtap->subns = 127;
1216
1217         /*
1218          * Radiotap vendor namespaces can (and should) also be
1219          * split into fields by using the standard radiotap
1220          * presence bitmap mechanism. Use just BIT(0) here for
1221          * the presence bitmap.
1222          */
1223         rtap->present = BIT(0);
1224         /* We have 8 bytes of (dummy) data */
1225         rtap->len = 8;
1226         /* For testing, also require it to be aligned */
1227         rtap->align = 8;
1228         /* And also test that padding works, 4 bytes */
1229         rtap->pad = 4;
1230         /* push the data */
1231         memcpy(rtap->data, "ABCDEFGH", 8);
1232         /* make sure to clear padding, mac80211 doesn't */
1233         memset(rtap->data + 8, 0, 4);
1234
1235         IEEE80211_SKB_RXCB(skb)->flag |= RX_FLAG_RADIOTAP_VENDOR_DATA;
1236 #endif
1237 }
1238
1239 static bool mac80211_hwsim_tx_frame_no_nl(struct ieee80211_hw *hw,
1240                                           struct sk_buff *skb,
1241                                           struct ieee80211_channel *chan)
1242 {
1243         struct mac80211_hwsim_data *data = hw->priv, *data2;
1244         bool ack = false;
1245         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1246         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1247         struct ieee80211_rx_status rx_status;
1248         u64 now;
1249
1250         memset(&rx_status, 0, sizeof(rx_status));
1251         rx_status.flag |= RX_FLAG_MACTIME_START;
1252         rx_status.freq = chan->center_freq;
1253         rx_status.band = chan->band;
1254         if (info->control.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) {
1255                 rx_status.rate_idx =
1256                         ieee80211_rate_get_vht_mcs(&info->control.rates[0]);
1257                 rx_status.nss =
1258                         ieee80211_rate_get_vht_nss(&info->control.rates[0]);
1259                 rx_status.encoding = RX_ENC_VHT;
1260         } else {
1261                 rx_status.rate_idx = info->control.rates[0].idx;
1262                 if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS)
1263                         rx_status.encoding = RX_ENC_HT;
1264         }
1265         if (info->control.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
1266                 rx_status.bw = RATE_INFO_BW_40;
1267         else if (info->control.rates[0].flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
1268                 rx_status.bw = RATE_INFO_BW_80;
1269         else if (info->control.rates[0].flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
1270                 rx_status.bw = RATE_INFO_BW_160;
1271         else
1272                 rx_status.bw = RATE_INFO_BW_20;
1273         if (info->control.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
1274                 rx_status.enc_flags |= RX_ENC_FLAG_SHORT_GI;
1275         /* TODO: simulate real signal strength (and optional packet loss) */
1276         rx_status.signal = -50;
1277         if (info->control.vif)
1278                 rx_status.signal += info->control.vif->bss_conf.txpower;
1279
1280         if (data->ps != PS_DISABLED)
1281                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1282
1283         /* release the skb's source info */
1284         skb_orphan(skb);
1285         skb_dst_drop(skb);
1286         skb->mark = 0;
1287         secpath_reset(skb);
1288         nf_reset(skb);
1289
1290         /*
1291          * Get absolute mactime here so all HWs RX at the "same time", and
1292          * absolute TX time for beacon mactime so the timestamp matches.
1293          * Giving beacons a different mactime than non-beacons looks messy, but
1294          * it helps the Toffset be exact and a ~10us mactime discrepancy
1295          * probably doesn't really matter.
1296          */
1297         if (ieee80211_is_beacon(hdr->frame_control) ||
1298             ieee80211_is_probe_resp(hdr->frame_control))
1299                 now = data->abs_bcn_ts;
1300         else
1301                 now = mac80211_hwsim_get_tsf_raw();
1302
1303         /* Copy skb to all enabled radios that are on the current frequency */
1304         spin_lock(&hwsim_radio_lock);
1305         list_for_each_entry(data2, &hwsim_radios, list) {
1306                 struct sk_buff *nskb;
1307                 struct tx_iter_data tx_iter_data = {
1308                         .receive = false,
1309                         .channel = chan,
1310                 };
1311
1312                 if (data == data2)
1313                         continue;
1314
1315                 if (!data2->started || (data2->idle && !data2->tmp_chan) ||
1316                     !hwsim_ps_rx_ok(data2, skb))
1317                         continue;
1318
1319                 if (!(data->group & data2->group))
1320                         continue;
1321
1322                 if (data->netgroup != data2->netgroup)
1323                         continue;
1324
1325                 if (!hwsim_chans_compat(chan, data2->tmp_chan) &&
1326                     !hwsim_chans_compat(chan, data2->channel)) {
1327                         ieee80211_iterate_active_interfaces_atomic(
1328                                 data2->hw, IEEE80211_IFACE_ITER_NORMAL,
1329                                 mac80211_hwsim_tx_iter, &tx_iter_data);
1330                         if (!tx_iter_data.receive)
1331                                 continue;
1332                 }
1333
1334                 /*
1335                  * reserve some space for our vendor and the normal
1336                  * radiotap header, since we're copying anyway
1337                  */
1338                 if (skb->len < PAGE_SIZE && paged_rx) {
1339                         struct page *page = alloc_page(GFP_ATOMIC);
1340
1341                         if (!page)
1342                                 continue;
1343
1344                         nskb = dev_alloc_skb(128);
1345                         if (!nskb) {
1346                                 __free_page(page);
1347                                 continue;
1348                         }
1349
1350                         memcpy(page_address(page), skb->data, skb->len);
1351                         skb_add_rx_frag(nskb, 0, page, 0, skb->len, skb->len);
1352                 } else {
1353                         nskb = skb_copy(skb, GFP_ATOMIC);
1354                         if (!nskb)
1355                                 continue;
1356                 }
1357
1358                 if (mac80211_hwsim_addr_match(data2, hdr->addr1))
1359                         ack = true;
1360
1361                 rx_status.mactime = now + data2->tsf_offset;
1362
1363                 memcpy(IEEE80211_SKB_RXCB(nskb), &rx_status, sizeof(rx_status));
1364
1365                 mac80211_hwsim_add_vendor_rtap(nskb);
1366
1367                 data2->rx_pkts++;
1368                 data2->rx_bytes += nskb->len;
1369                 ieee80211_rx_irqsafe(data2->hw, nskb);
1370         }
1371         spin_unlock(&hwsim_radio_lock);
1372
1373         return ack;
1374 }
1375
1376 static void mac80211_hwsim_tx(struct ieee80211_hw *hw,
1377                               struct ieee80211_tx_control *control,
1378                               struct sk_buff *skb)
1379 {
1380         struct mac80211_hwsim_data *data = hw->priv;
1381         struct ieee80211_tx_info *txi = IEEE80211_SKB_CB(skb);
1382         struct ieee80211_hdr *hdr = (void *)skb->data;
1383         struct ieee80211_chanctx_conf *chanctx_conf;
1384         struct ieee80211_channel *channel;
1385         bool ack;
1386         u32 _portid;
1387
1388         if (WARN_ON(skb->len < 10)) {
1389                 /* Should not happen; just a sanity check for addr1 use */
1390                 ieee80211_free_txskb(hw, skb);
1391                 return;
1392         }
1393
1394         if (!data->use_chanctx) {
1395                 channel = data->channel;
1396         } else if (txi->hw_queue == 4) {
1397                 channel = data->tmp_chan;
1398         } else {
1399                 chanctx_conf = rcu_dereference(txi->control.vif->chanctx_conf);
1400                 if (chanctx_conf)
1401                         channel = chanctx_conf->def.chan;
1402                 else
1403                         channel = NULL;
1404         }
1405
1406         if (WARN(!channel, "TX w/o channel - queue = %d\n", txi->hw_queue)) {
1407                 ieee80211_free_txskb(hw, skb);
1408                 return;
1409         }
1410
1411         if (data->idle && !data->tmp_chan) {
1412                 wiphy_dbg(hw->wiphy, "Trying to TX when idle - reject\n");
1413                 ieee80211_free_txskb(hw, skb);
1414                 return;
1415         }
1416
1417         if (txi->control.vif)
1418                 hwsim_check_magic(txi->control.vif);
1419         if (control->sta)
1420                 hwsim_check_sta_magic(control->sta);
1421
1422         if (ieee80211_hw_check(hw, SUPPORTS_RC_TABLE))
1423                 ieee80211_get_tx_rates(txi->control.vif, control->sta, skb,
1424                                        txi->control.rates,
1425                                        ARRAY_SIZE(txi->control.rates));
1426
1427         if (skb->len >= 24 + 8 &&
1428             ieee80211_is_probe_resp(hdr->frame_control)) {
1429                 /* fake header transmission time */
1430                 struct ieee80211_mgmt *mgmt;
1431                 struct ieee80211_rate *txrate;
1432                 u64 ts;
1433
1434                 mgmt = (struct ieee80211_mgmt *)skb->data;
1435                 txrate = ieee80211_get_tx_rate(hw, txi);
1436                 ts = mac80211_hwsim_get_tsf_raw();
1437                 mgmt->u.probe_resp.timestamp =
1438                         cpu_to_le64(ts + data->tsf_offset +
1439                                     24 * 8 * 10 / txrate->bitrate);
1440         }
1441
1442         mac80211_hwsim_monitor_rx(hw, skb, channel);
1443
1444         /* wmediumd mode check */
1445         _portid = READ_ONCE(data->wmediumd);
1446
1447         if (_portid)
1448                 return mac80211_hwsim_tx_frame_nl(hw, skb, _portid);
1449
1450         /* NO wmediumd detected, perfect medium simulation */
1451         data->tx_pkts++;
1452         data->tx_bytes += skb->len;
1453         ack = mac80211_hwsim_tx_frame_no_nl(hw, skb, channel);
1454
1455         if (ack && skb->len >= 16)
1456                 mac80211_hwsim_monitor_ack(channel, hdr->addr2);
1457
1458         ieee80211_tx_info_clear_status(txi);
1459
1460         /* frame was transmitted at most favorable rate at first attempt */
1461         txi->control.rates[0].count = 1;
1462         txi->control.rates[1].idx = -1;
1463
1464         if (!(txi->flags & IEEE80211_TX_CTL_NO_ACK) && ack)
1465                 txi->flags |= IEEE80211_TX_STAT_ACK;
1466         ieee80211_tx_status_irqsafe(hw, skb);
1467 }
1468
1469
1470 static int mac80211_hwsim_start(struct ieee80211_hw *hw)
1471 {
1472         struct mac80211_hwsim_data *data = hw->priv;
1473         wiphy_dbg(hw->wiphy, "%s\n", __func__);
1474         data->started = true;
1475         return 0;
1476 }
1477
1478
1479 static void mac80211_hwsim_stop(struct ieee80211_hw *hw)
1480 {
1481         struct mac80211_hwsim_data *data = hw->priv;
1482         data->started = false;
1483         tasklet_hrtimer_cancel(&data->beacon_timer);
1484         wiphy_dbg(hw->wiphy, "%s\n", __func__);
1485 }
1486
1487
1488 static int mac80211_hwsim_add_interface(struct ieee80211_hw *hw,
1489                                         struct ieee80211_vif *vif)
1490 {
1491         wiphy_dbg(hw->wiphy, "%s (type=%d mac_addr=%pM)\n",
1492                   __func__, ieee80211_vif_type_p2p(vif),
1493                   vif->addr);
1494         hwsim_set_magic(vif);
1495
1496         vif->cab_queue = 0;
1497         vif->hw_queue[IEEE80211_AC_VO] = 0;
1498         vif->hw_queue[IEEE80211_AC_VI] = 1;
1499         vif->hw_queue[IEEE80211_AC_BE] = 2;
1500         vif->hw_queue[IEEE80211_AC_BK] = 3;
1501
1502         return 0;
1503 }
1504
1505
1506 static int mac80211_hwsim_change_interface(struct ieee80211_hw *hw,
1507                                            struct ieee80211_vif *vif,
1508                                            enum nl80211_iftype newtype,
1509                                            bool newp2p)
1510 {
1511         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1512         wiphy_dbg(hw->wiphy,
1513                   "%s (old type=%d, new type=%d, mac_addr=%pM)\n",
1514                   __func__, ieee80211_vif_type_p2p(vif),
1515                     newtype, vif->addr);
1516         hwsim_check_magic(vif);
1517
1518         /*
1519          * interface may change from non-AP to AP in
1520          * which case this needs to be set up again
1521          */
1522         vif->cab_queue = 0;
1523
1524         return 0;
1525 }
1526
1527 static void mac80211_hwsim_remove_interface(
1528         struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1529 {
1530         wiphy_dbg(hw->wiphy, "%s (type=%d mac_addr=%pM)\n",
1531                   __func__, ieee80211_vif_type_p2p(vif),
1532                   vif->addr);
1533         hwsim_check_magic(vif);
1534         hwsim_clear_magic(vif);
1535 }
1536
1537 static void mac80211_hwsim_tx_frame(struct ieee80211_hw *hw,
1538                                     struct sk_buff *skb,
1539                                     struct ieee80211_channel *chan)
1540 {
1541         struct mac80211_hwsim_data *data = hw->priv;
1542         u32 _pid = READ_ONCE(data->wmediumd);
1543
1544         if (ieee80211_hw_check(hw, SUPPORTS_RC_TABLE)) {
1545                 struct ieee80211_tx_info *txi = IEEE80211_SKB_CB(skb);
1546                 ieee80211_get_tx_rates(txi->control.vif, NULL, skb,
1547                                        txi->control.rates,
1548                                        ARRAY_SIZE(txi->control.rates));
1549         }
1550
1551         mac80211_hwsim_monitor_rx(hw, skb, chan);
1552
1553         if (_pid)
1554                 return mac80211_hwsim_tx_frame_nl(hw, skb, _pid);
1555
1556         mac80211_hwsim_tx_frame_no_nl(hw, skb, chan);
1557         dev_kfree_skb(skb);
1558 }
1559
1560 static void mac80211_hwsim_beacon_tx(void *arg, u8 *mac,
1561                                      struct ieee80211_vif *vif)
1562 {
1563         struct mac80211_hwsim_data *data = arg;
1564         struct ieee80211_hw *hw = data->hw;
1565         struct ieee80211_tx_info *info;
1566         struct ieee80211_rate *txrate;
1567         struct ieee80211_mgmt *mgmt;
1568         struct sk_buff *skb;
1569
1570         hwsim_check_magic(vif);
1571
1572         if (vif->type != NL80211_IFTYPE_AP &&
1573             vif->type != NL80211_IFTYPE_MESH_POINT &&
1574             vif->type != NL80211_IFTYPE_ADHOC)
1575                 return;
1576
1577         skb = ieee80211_beacon_get(hw, vif);
1578         if (skb == NULL)
1579                 return;
1580         info = IEEE80211_SKB_CB(skb);
1581         if (ieee80211_hw_check(hw, SUPPORTS_RC_TABLE))
1582                 ieee80211_get_tx_rates(vif, NULL, skb,
1583                                        info->control.rates,
1584                                        ARRAY_SIZE(info->control.rates));
1585
1586         txrate = ieee80211_get_tx_rate(hw, info);
1587
1588         mgmt = (struct ieee80211_mgmt *) skb->data;
1589         /* fake header transmission time */
1590         data->abs_bcn_ts = mac80211_hwsim_get_tsf_raw();
1591         mgmt->u.beacon.timestamp = cpu_to_le64(data->abs_bcn_ts +
1592                                                data->tsf_offset +
1593                                                24 * 8 * 10 / txrate->bitrate);
1594
1595         mac80211_hwsim_tx_frame(hw, skb,
1596                                 rcu_dereference(vif->chanctx_conf)->def.chan);
1597
1598         if (vif->csa_active && ieee80211_csa_is_complete(vif))
1599                 ieee80211_csa_finish(vif);
1600 }
1601
1602 static enum hrtimer_restart
1603 mac80211_hwsim_beacon(struct hrtimer *timer)
1604 {
1605         struct mac80211_hwsim_data *data =
1606                 container_of(timer, struct mac80211_hwsim_data,
1607                              beacon_timer.timer);
1608         struct ieee80211_hw *hw = data->hw;
1609         u64 bcn_int = data->beacon_int;
1610         ktime_t next_bcn;
1611
1612         if (!data->started)
1613                 goto out;
1614
1615         ieee80211_iterate_active_interfaces_atomic(
1616                 hw, IEEE80211_IFACE_ITER_NORMAL,
1617                 mac80211_hwsim_beacon_tx, data);
1618
1619         /* beacon at new TBTT + beacon interval */
1620         if (data->bcn_delta) {
1621                 bcn_int -= data->bcn_delta;
1622                 data->bcn_delta = 0;
1623         }
1624
1625         next_bcn = ktime_add(hrtimer_get_expires(timer),
1626                              ns_to_ktime(bcn_int * 1000));
1627         tasklet_hrtimer_start(&data->beacon_timer, next_bcn, HRTIMER_MODE_ABS);
1628 out:
1629         return HRTIMER_NORESTART;
1630 }
1631
1632 static const char * const hwsim_chanwidths[] = {
1633         [NL80211_CHAN_WIDTH_20_NOHT] = "noht",
1634         [NL80211_CHAN_WIDTH_20] = "ht20",
1635         [NL80211_CHAN_WIDTH_40] = "ht40",
1636         [NL80211_CHAN_WIDTH_80] = "vht80",
1637         [NL80211_CHAN_WIDTH_80P80] = "vht80p80",
1638         [NL80211_CHAN_WIDTH_160] = "vht160",
1639 };
1640
1641 static int mac80211_hwsim_config(struct ieee80211_hw *hw, u32 changed)
1642 {
1643         struct mac80211_hwsim_data *data = hw->priv;
1644         struct ieee80211_conf *conf = &hw->conf;
1645         static const char *smps_modes[IEEE80211_SMPS_NUM_MODES] = {
1646                 [IEEE80211_SMPS_AUTOMATIC] = "auto",
1647                 [IEEE80211_SMPS_OFF] = "off",
1648                 [IEEE80211_SMPS_STATIC] = "static",
1649                 [IEEE80211_SMPS_DYNAMIC] = "dynamic",
1650         };
1651         int idx;
1652
1653         if (conf->chandef.chan)
1654                 wiphy_dbg(hw->wiphy,
1655                           "%s (freq=%d(%d - %d)/%s idle=%d ps=%d smps=%s)\n",
1656                           __func__,
1657                           conf->chandef.chan->center_freq,
1658                           conf->chandef.center_freq1,
1659                           conf->chandef.center_freq2,
1660                           hwsim_chanwidths[conf->chandef.width],
1661                           !!(conf->flags & IEEE80211_CONF_IDLE),
1662                           !!(conf->flags & IEEE80211_CONF_PS),
1663                           smps_modes[conf->smps_mode]);
1664         else
1665                 wiphy_dbg(hw->wiphy,
1666                           "%s (freq=0 idle=%d ps=%d smps=%s)\n",
1667                           __func__,
1668                           !!(conf->flags & IEEE80211_CONF_IDLE),
1669                           !!(conf->flags & IEEE80211_CONF_PS),
1670                           smps_modes[conf->smps_mode]);
1671
1672         data->idle = !!(conf->flags & IEEE80211_CONF_IDLE);
1673
1674         WARN_ON(conf->chandef.chan && data->use_chanctx);
1675
1676         mutex_lock(&data->mutex);
1677         if (data->scanning && conf->chandef.chan) {
1678                 for (idx = 0; idx < ARRAY_SIZE(data->survey_data); idx++) {
1679                         if (data->survey_data[idx].channel == data->channel) {
1680                                 data->survey_data[idx].start =
1681                                         data->survey_data[idx].next_start;
1682                                 data->survey_data[idx].end = jiffies;
1683                                 break;
1684                         }
1685                 }
1686
1687                 data->channel = conf->chandef.chan;
1688
1689                 for (idx = 0; idx < ARRAY_SIZE(data->survey_data); idx++) {
1690                         if (data->survey_data[idx].channel &&
1691                             data->survey_data[idx].channel != data->channel)
1692                                 continue;
1693                         data->survey_data[idx].channel = data->channel;
1694                         data->survey_data[idx].next_start = jiffies;
1695                         break;
1696                 }
1697         } else {
1698                 data->channel = conf->chandef.chan;
1699         }
1700         mutex_unlock(&data->mutex);
1701
1702         if (!data->started || !data->beacon_int)
1703                 tasklet_hrtimer_cancel(&data->beacon_timer);
1704         else if (!hrtimer_is_queued(&data->beacon_timer.timer)) {
1705                 u64 tsf = mac80211_hwsim_get_tsf(hw, NULL);
1706                 u32 bcn_int = data->beacon_int;
1707                 u64 until_tbtt = bcn_int - do_div(tsf, bcn_int);
1708
1709                 tasklet_hrtimer_start(&data->beacon_timer,
1710                                       ns_to_ktime(until_tbtt * 1000),
1711                                       HRTIMER_MODE_REL);
1712         }
1713
1714         return 0;
1715 }
1716
1717
1718 static void mac80211_hwsim_configure_filter(struct ieee80211_hw *hw,
1719                                             unsigned int changed_flags,
1720                                             unsigned int *total_flags,u64 multicast)
1721 {
1722         struct mac80211_hwsim_data *data = hw->priv;
1723
1724         wiphy_dbg(hw->wiphy, "%s\n", __func__);
1725
1726         data->rx_filter = 0;
1727         if (*total_flags & FIF_ALLMULTI)
1728                 data->rx_filter |= FIF_ALLMULTI;
1729
1730         *total_flags = data->rx_filter;
1731 }
1732
1733 static void mac80211_hwsim_bcn_en_iter(void *data, u8 *mac,
1734                                        struct ieee80211_vif *vif)
1735 {
1736         unsigned int *count = data;
1737         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
1738
1739         if (vp->bcn_en)
1740                 (*count)++;
1741 }
1742
1743 static void mac80211_hwsim_bss_info_changed(struct ieee80211_hw *hw,
1744                                             struct ieee80211_vif *vif,
1745                                             struct ieee80211_bss_conf *info,
1746                                             u32 changed)
1747 {
1748         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
1749         struct mac80211_hwsim_data *data = hw->priv;
1750
1751         hwsim_check_magic(vif);
1752
1753         wiphy_dbg(hw->wiphy, "%s(changed=0x%x vif->addr=%pM)\n",
1754                   __func__, changed, vif->addr);
1755
1756         if (changed & BSS_CHANGED_BSSID) {
1757                 wiphy_dbg(hw->wiphy, "%s: BSSID changed: %pM\n",
1758                           __func__, info->bssid);
1759                 memcpy(vp->bssid, info->bssid, ETH_ALEN);
1760         }
1761
1762         if (changed & BSS_CHANGED_ASSOC) {
1763                 wiphy_dbg(hw->wiphy, "  ASSOC: assoc=%d aid=%d\n",
1764                           info->assoc, info->aid);
1765                 vp->assoc = info->assoc;
1766                 vp->aid = info->aid;
1767         }
1768
1769         if (changed & BSS_CHANGED_BEACON_ENABLED) {
1770                 wiphy_dbg(hw->wiphy, "  BCN EN: %d (BI=%u)\n",
1771                           info->enable_beacon, info->beacon_int);
1772                 vp->bcn_en = info->enable_beacon;
1773                 if (data->started &&
1774                     !hrtimer_is_queued(&data->beacon_timer.timer) &&
1775                     info->enable_beacon) {
1776                         u64 tsf, until_tbtt;
1777                         u32 bcn_int;
1778                         data->beacon_int = info->beacon_int * 1024;
1779                         tsf = mac80211_hwsim_get_tsf(hw, vif);
1780                         bcn_int = data->beacon_int;
1781                         until_tbtt = bcn_int - do_div(tsf, bcn_int);
1782                         tasklet_hrtimer_start(&data->beacon_timer,
1783                                               ns_to_ktime(until_tbtt * 1000),
1784                                               HRTIMER_MODE_REL);
1785                 } else if (!info->enable_beacon) {
1786                         unsigned int count = 0;
1787                         ieee80211_iterate_active_interfaces_atomic(
1788                                 data->hw, IEEE80211_IFACE_ITER_NORMAL,
1789                                 mac80211_hwsim_bcn_en_iter, &count);
1790                         wiphy_dbg(hw->wiphy, "  beaconing vifs remaining: %u",
1791                                   count);
1792                         if (count == 0) {
1793                                 tasklet_hrtimer_cancel(&data->beacon_timer);
1794                                 data->beacon_int = 0;
1795                         }
1796                 }
1797         }
1798
1799         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1800                 wiphy_dbg(hw->wiphy, "  ERP_CTS_PROT: %d\n",
1801                           info->use_cts_prot);
1802         }
1803
1804         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1805                 wiphy_dbg(hw->wiphy, "  ERP_PREAMBLE: %d\n",
1806                           info->use_short_preamble);
1807         }
1808
1809         if (changed & BSS_CHANGED_ERP_SLOT) {
1810                 wiphy_dbg(hw->wiphy, "  ERP_SLOT: %d\n", info->use_short_slot);
1811         }
1812
1813         if (changed & BSS_CHANGED_HT) {
1814                 wiphy_dbg(hw->wiphy, "  HT: op_mode=0x%x\n",
1815                           info->ht_operation_mode);
1816         }
1817
1818         if (changed & BSS_CHANGED_BASIC_RATES) {
1819                 wiphy_dbg(hw->wiphy, "  BASIC_RATES: 0x%llx\n",
1820                           (unsigned long long) info->basic_rates);
1821         }
1822
1823         if (changed & BSS_CHANGED_TXPOWER)
1824                 wiphy_dbg(hw->wiphy, "  TX Power: %d dBm\n", info->txpower);
1825 }
1826
1827 static int mac80211_hwsim_sta_add(struct ieee80211_hw *hw,
1828                                   struct ieee80211_vif *vif,
1829                                   struct ieee80211_sta *sta)
1830 {
1831         hwsim_check_magic(vif);
1832         hwsim_set_sta_magic(sta);
1833
1834         return 0;
1835 }
1836
1837 static int mac80211_hwsim_sta_remove(struct ieee80211_hw *hw,
1838                                      struct ieee80211_vif *vif,
1839                                      struct ieee80211_sta *sta)
1840 {
1841         hwsim_check_magic(vif);
1842         hwsim_clear_sta_magic(sta);
1843
1844         return 0;
1845 }
1846
1847 static void mac80211_hwsim_sta_notify(struct ieee80211_hw *hw,
1848                                       struct ieee80211_vif *vif,
1849                                       enum sta_notify_cmd cmd,
1850                                       struct ieee80211_sta *sta)
1851 {
1852         hwsim_check_magic(vif);
1853
1854         switch (cmd) {
1855         case STA_NOTIFY_SLEEP:
1856         case STA_NOTIFY_AWAKE:
1857                 /* TODO: make good use of these flags */
1858                 break;
1859         default:
1860                 WARN(1, "Invalid sta notify: %d\n", cmd);
1861                 break;
1862         }
1863 }
1864
1865 static int mac80211_hwsim_set_tim(struct ieee80211_hw *hw,
1866                                   struct ieee80211_sta *sta,
1867                                   bool set)
1868 {
1869         hwsim_check_sta_magic(sta);
1870         return 0;
1871 }
1872
1873 static int mac80211_hwsim_conf_tx(
1874         struct ieee80211_hw *hw,
1875         struct ieee80211_vif *vif, u16 queue,
1876         const struct ieee80211_tx_queue_params *params)
1877 {
1878         wiphy_dbg(hw->wiphy,
1879                   "%s (queue=%d txop=%d cw_min=%d cw_max=%d aifs=%d)\n",
1880                   __func__, queue,
1881                   params->txop, params->cw_min,
1882                   params->cw_max, params->aifs);
1883         return 0;
1884 }
1885
1886 static int mac80211_hwsim_get_survey(struct ieee80211_hw *hw, int idx,
1887                                      struct survey_info *survey)
1888 {
1889         struct mac80211_hwsim_data *hwsim = hw->priv;
1890
1891         if (idx < 0 || idx >= ARRAY_SIZE(hwsim->survey_data))
1892                 return -ENOENT;
1893
1894         mutex_lock(&hwsim->mutex);
1895         survey->channel = hwsim->survey_data[idx].channel;
1896         if (!survey->channel) {
1897                 mutex_unlock(&hwsim->mutex);
1898                 return -ENOENT;
1899         }
1900
1901         /*
1902          * Magically conjured dummy values --- this is only ok for simulated hardware.
1903          *
1904          * A real driver which cannot determine real values noise MUST NOT
1905          * report any, especially not a magically conjured ones :-)
1906          */
1907         survey->filled = SURVEY_INFO_NOISE_DBM |
1908                          SURVEY_INFO_TIME |
1909                          SURVEY_INFO_TIME_BUSY;
1910         survey->noise = -92;
1911         survey->time =
1912                 jiffies_to_msecs(hwsim->survey_data[idx].end -
1913                                  hwsim->survey_data[idx].start);
1914         /* report 12.5% of channel time is used */
1915         survey->time_busy = survey->time/8;
1916         mutex_unlock(&hwsim->mutex);
1917
1918         return 0;
1919 }
1920
1921 #ifdef CONFIG_NL80211_TESTMODE
1922 /*
1923  * This section contains example code for using netlink
1924  * attributes with the testmode command in nl80211.
1925  */
1926
1927 /* These enums need to be kept in sync with userspace */
1928 enum hwsim_testmode_attr {
1929         __HWSIM_TM_ATTR_INVALID = 0,
1930         HWSIM_TM_ATTR_CMD       = 1,
1931         HWSIM_TM_ATTR_PS        = 2,
1932
1933         /* keep last */
1934         __HWSIM_TM_ATTR_AFTER_LAST,
1935         HWSIM_TM_ATTR_MAX       = __HWSIM_TM_ATTR_AFTER_LAST - 1
1936 };
1937
1938 enum hwsim_testmode_cmd {
1939         HWSIM_TM_CMD_SET_PS             = 0,
1940         HWSIM_TM_CMD_GET_PS             = 1,
1941         HWSIM_TM_CMD_STOP_QUEUES        = 2,
1942         HWSIM_TM_CMD_WAKE_QUEUES        = 3,
1943 };
1944
1945 static const struct nla_policy hwsim_testmode_policy[HWSIM_TM_ATTR_MAX + 1] = {
1946         [HWSIM_TM_ATTR_CMD] = { .type = NLA_U32 },
1947         [HWSIM_TM_ATTR_PS] = { .type = NLA_U32 },
1948 };
1949
1950 static int mac80211_hwsim_testmode_cmd(struct ieee80211_hw *hw,
1951                                        struct ieee80211_vif *vif,
1952                                        void *data, int len)
1953 {
1954         struct mac80211_hwsim_data *hwsim = hw->priv;
1955         struct nlattr *tb[HWSIM_TM_ATTR_MAX + 1];
1956         struct sk_buff *skb;
1957         int err, ps;
1958
1959         err = nla_parse(tb, HWSIM_TM_ATTR_MAX, data, len,
1960                         hwsim_testmode_policy, NULL);
1961         if (err)
1962                 return err;
1963
1964         if (!tb[HWSIM_TM_ATTR_CMD])
1965                 return -EINVAL;
1966
1967         switch (nla_get_u32(tb[HWSIM_TM_ATTR_CMD])) {
1968         case HWSIM_TM_CMD_SET_PS:
1969                 if (!tb[HWSIM_TM_ATTR_PS])
1970                         return -EINVAL;
1971                 ps = nla_get_u32(tb[HWSIM_TM_ATTR_PS]);
1972                 return hwsim_fops_ps_write(hwsim, ps);
1973         case HWSIM_TM_CMD_GET_PS:
1974                 skb = cfg80211_testmode_alloc_reply_skb(hw->wiphy,
1975                                                 nla_total_size(sizeof(u32)));
1976                 if (!skb)
1977                         return -ENOMEM;
1978                 if (nla_put_u32(skb, HWSIM_TM_ATTR_PS, hwsim->ps))
1979                         goto nla_put_failure;
1980                 return cfg80211_testmode_reply(skb);
1981         case HWSIM_TM_CMD_STOP_QUEUES:
1982                 ieee80211_stop_queues(hw);
1983                 return 0;
1984         case HWSIM_TM_CMD_WAKE_QUEUES:
1985                 ieee80211_wake_queues(hw);
1986                 return 0;
1987         default:
1988                 return -EOPNOTSUPP;
1989         }
1990
1991  nla_put_failure:
1992         kfree_skb(skb);
1993         return -ENOBUFS;
1994 }
1995 #endif
1996
1997 static int mac80211_hwsim_ampdu_action(struct ieee80211_hw *hw,
1998                                        struct ieee80211_vif *vif,
1999                                        struct ieee80211_ampdu_params *params)
2000 {
2001         struct ieee80211_sta *sta = params->sta;
2002         enum ieee80211_ampdu_mlme_action action = params->action;
2003         u16 tid = params->tid;
2004
2005         switch (action) {
2006         case IEEE80211_AMPDU_TX_START:
2007                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2008                 break;
2009         case IEEE80211_AMPDU_TX_STOP_CONT:
2010         case IEEE80211_AMPDU_TX_STOP_FLUSH:
2011         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
2012                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
2013                 break;
2014         case IEEE80211_AMPDU_TX_OPERATIONAL:
2015                 break;
2016         case IEEE80211_AMPDU_RX_START:
2017         case IEEE80211_AMPDU_RX_STOP:
2018                 break;
2019         default:
2020                 return -EOPNOTSUPP;
2021         }
2022
2023         return 0;
2024 }
2025
2026 static void mac80211_hwsim_flush(struct ieee80211_hw *hw,
2027                                  struct ieee80211_vif *vif,
2028                                  u32 queues, bool drop)
2029 {
2030         /* Not implemented, queues only on kernel side */
2031 }
2032
2033 static void hw_scan_work(struct work_struct *work)
2034 {
2035         struct mac80211_hwsim_data *hwsim =
2036                 container_of(work, struct mac80211_hwsim_data, hw_scan.work);
2037         struct cfg80211_scan_request *req = hwsim->hw_scan_request;
2038         int dwell, i;
2039
2040         mutex_lock(&hwsim->mutex);
2041         if (hwsim->scan_chan_idx >= req->n_channels) {
2042                 struct cfg80211_scan_info info = {
2043                         .aborted = false,
2044                 };
2045
2046                 wiphy_dbg(hwsim->hw->wiphy, "hw scan complete\n");
2047                 ieee80211_scan_completed(hwsim->hw, &info);
2048                 hwsim->hw_scan_request = NULL;
2049                 hwsim->hw_scan_vif = NULL;
2050                 hwsim->tmp_chan = NULL;
2051                 mutex_unlock(&hwsim->mutex);
2052                 return;
2053         }
2054
2055         wiphy_dbg(hwsim->hw->wiphy, "hw scan %d MHz\n",
2056                   req->channels[hwsim->scan_chan_idx]->center_freq);
2057
2058         hwsim->tmp_chan = req->channels[hwsim->scan_chan_idx];
2059         if (hwsim->tmp_chan->flags & (IEEE80211_CHAN_NO_IR |
2060                                       IEEE80211_CHAN_RADAR) ||
2061             !req->n_ssids) {
2062                 dwell = 120;
2063         } else {
2064                 dwell = 30;
2065                 /* send probes */
2066                 for (i = 0; i < req->n_ssids; i++) {
2067                         struct sk_buff *probe;
2068                         struct ieee80211_mgmt *mgmt;
2069
2070                         probe = ieee80211_probereq_get(hwsim->hw,
2071                                                        hwsim->scan_addr,
2072                                                        req->ssids[i].ssid,
2073                                                        req->ssids[i].ssid_len,
2074                                                        req->ie_len);
2075                         if (!probe)
2076                                 continue;
2077
2078                         mgmt = (struct ieee80211_mgmt *) probe->data;
2079                         memcpy(mgmt->da, req->bssid, ETH_ALEN);
2080                         memcpy(mgmt->bssid, req->bssid, ETH_ALEN);
2081
2082                         if (req->ie_len)
2083                                 skb_put_data(probe, req->ie, req->ie_len);
2084
2085                         local_bh_disable();
2086                         mac80211_hwsim_tx_frame(hwsim->hw, probe,
2087                                                 hwsim->tmp_chan);
2088                         local_bh_enable();
2089                 }
2090         }
2091         ieee80211_queue_delayed_work(hwsim->hw, &hwsim->hw_scan,
2092                                      msecs_to_jiffies(dwell));
2093         hwsim->survey_data[hwsim->scan_chan_idx].channel = hwsim->tmp_chan;
2094         hwsim->survey_data[hwsim->scan_chan_idx].start = jiffies;
2095         hwsim->survey_data[hwsim->scan_chan_idx].end =
2096                 jiffies + msecs_to_jiffies(dwell);
2097         hwsim->scan_chan_idx++;
2098         mutex_unlock(&hwsim->mutex);
2099 }
2100
2101 static int mac80211_hwsim_hw_scan(struct ieee80211_hw *hw,
2102                                   struct ieee80211_vif *vif,
2103                                   struct ieee80211_scan_request *hw_req)
2104 {
2105         struct mac80211_hwsim_data *hwsim = hw->priv;
2106         struct cfg80211_scan_request *req = &hw_req->req;
2107
2108         mutex_lock(&hwsim->mutex);
2109         if (WARN_ON(hwsim->tmp_chan || hwsim->hw_scan_request)) {
2110                 mutex_unlock(&hwsim->mutex);
2111                 return -EBUSY;
2112         }
2113         hwsim->hw_scan_request = req;
2114         hwsim->hw_scan_vif = vif;
2115         hwsim->scan_chan_idx = 0;
2116         if (req->flags & NL80211_SCAN_FLAG_RANDOM_ADDR)
2117                 get_random_mask_addr(hwsim->scan_addr,
2118                                      hw_req->req.mac_addr,
2119                                      hw_req->req.mac_addr_mask);
2120         else
2121                 memcpy(hwsim->scan_addr, vif->addr, ETH_ALEN);
2122         memset(hwsim->survey_data, 0, sizeof(hwsim->survey_data));
2123         mutex_unlock(&hwsim->mutex);
2124
2125         wiphy_dbg(hw->wiphy, "hwsim hw_scan request\n");
2126
2127         ieee80211_queue_delayed_work(hwsim->hw, &hwsim->hw_scan, 0);
2128
2129         return 0;
2130 }
2131
2132 static void mac80211_hwsim_cancel_hw_scan(struct ieee80211_hw *hw,
2133                                           struct ieee80211_vif *vif)
2134 {
2135         struct mac80211_hwsim_data *hwsim = hw->priv;
2136         struct cfg80211_scan_info info = {
2137                 .aborted = true,
2138         };
2139
2140         wiphy_dbg(hw->wiphy, "hwsim cancel_hw_scan\n");
2141
2142         cancel_delayed_work_sync(&hwsim->hw_scan);
2143
2144         mutex_lock(&hwsim->mutex);
2145         ieee80211_scan_completed(hwsim->hw, &info);
2146         hwsim->tmp_chan = NULL;
2147         hwsim->hw_scan_request = NULL;
2148         hwsim->hw_scan_vif = NULL;
2149         mutex_unlock(&hwsim->mutex);
2150 }
2151
2152 static void mac80211_hwsim_sw_scan(struct ieee80211_hw *hw,
2153                                    struct ieee80211_vif *vif,
2154                                    const u8 *mac_addr)
2155 {
2156         struct mac80211_hwsim_data *hwsim = hw->priv;
2157
2158         mutex_lock(&hwsim->mutex);
2159
2160         if (hwsim->scanning) {
2161                 pr_debug("two hwsim sw_scans detected!\n");
2162                 goto out;
2163         }
2164
2165         pr_debug("hwsim sw_scan request, prepping stuff\n");
2166
2167         memcpy(hwsim->scan_addr, mac_addr, ETH_ALEN);
2168         hwsim->scanning = true;
2169         memset(hwsim->survey_data, 0, sizeof(hwsim->survey_data));
2170
2171 out:
2172         mutex_unlock(&hwsim->mutex);
2173 }
2174
2175 static void mac80211_hwsim_sw_scan_complete(struct ieee80211_hw *hw,
2176                                             struct ieee80211_vif *vif)
2177 {
2178         struct mac80211_hwsim_data *hwsim = hw->priv;
2179
2180         mutex_lock(&hwsim->mutex);
2181
2182         pr_debug("hwsim sw_scan_complete\n");
2183         hwsim->scanning = false;
2184         eth_zero_addr(hwsim->scan_addr);
2185
2186         mutex_unlock(&hwsim->mutex);
2187 }
2188
2189 static void hw_roc_start(struct work_struct *work)
2190 {
2191         struct mac80211_hwsim_data *hwsim =
2192                 container_of(work, struct mac80211_hwsim_data, roc_start.work);
2193
2194         mutex_lock(&hwsim->mutex);
2195
2196         wiphy_dbg(hwsim->hw->wiphy, "hwsim ROC begins\n");
2197         hwsim->tmp_chan = hwsim->roc_chan;
2198         ieee80211_ready_on_channel(hwsim->hw);
2199
2200         ieee80211_queue_delayed_work(hwsim->hw, &hwsim->roc_done,
2201                                      msecs_to_jiffies(hwsim->roc_duration));
2202
2203         mutex_unlock(&hwsim->mutex);
2204 }
2205
2206 static void hw_roc_done(struct work_struct *work)
2207 {
2208         struct mac80211_hwsim_data *hwsim =
2209                 container_of(work, struct mac80211_hwsim_data, roc_done.work);
2210
2211         mutex_lock(&hwsim->mutex);
2212         ieee80211_remain_on_channel_expired(hwsim->hw);
2213         hwsim->tmp_chan = NULL;
2214         mutex_unlock(&hwsim->mutex);
2215
2216         wiphy_dbg(hwsim->hw->wiphy, "hwsim ROC expired\n");
2217 }
2218
2219 static int mac80211_hwsim_roc(struct ieee80211_hw *hw,
2220                               struct ieee80211_vif *vif,
2221                               struct ieee80211_channel *chan,
2222                               int duration,
2223                               enum ieee80211_roc_type type)
2224 {
2225         struct mac80211_hwsim_data *hwsim = hw->priv;
2226
2227         mutex_lock(&hwsim->mutex);
2228         if (WARN_ON(hwsim->tmp_chan || hwsim->hw_scan_request)) {
2229                 mutex_unlock(&hwsim->mutex);
2230                 return -EBUSY;
2231         }
2232
2233         hwsim->roc_chan = chan;
2234         hwsim->roc_duration = duration;
2235         mutex_unlock(&hwsim->mutex);
2236
2237         wiphy_dbg(hw->wiphy, "hwsim ROC (%d MHz, %d ms)\n",
2238                   chan->center_freq, duration);
2239         ieee80211_queue_delayed_work(hw, &hwsim->roc_start, HZ/50);
2240
2241         return 0;
2242 }
2243
2244 static int mac80211_hwsim_croc(struct ieee80211_hw *hw)
2245 {
2246         struct mac80211_hwsim_data *hwsim = hw->priv;
2247
2248         cancel_delayed_work_sync(&hwsim->roc_start);
2249         cancel_delayed_work_sync(&hwsim->roc_done);
2250
2251         mutex_lock(&hwsim->mutex);
2252         hwsim->tmp_chan = NULL;
2253         mutex_unlock(&hwsim->mutex);
2254
2255         wiphy_dbg(hw->wiphy, "hwsim ROC canceled\n");
2256
2257         return 0;
2258 }
2259
2260 static int mac80211_hwsim_add_chanctx(struct ieee80211_hw *hw,
2261                                       struct ieee80211_chanctx_conf *ctx)
2262 {
2263         hwsim_set_chanctx_magic(ctx);
2264         wiphy_dbg(hw->wiphy,
2265                   "add channel context control: %d MHz/width: %d/cfreqs:%d/%d MHz\n",
2266                   ctx->def.chan->center_freq, ctx->def.width,
2267                   ctx->def.center_freq1, ctx->def.center_freq2);
2268         return 0;
2269 }
2270
2271 static void mac80211_hwsim_remove_chanctx(struct ieee80211_hw *hw,
2272                                           struct ieee80211_chanctx_conf *ctx)
2273 {
2274         wiphy_dbg(hw->wiphy,
2275                   "remove channel context control: %d MHz/width: %d/cfreqs:%d/%d MHz\n",
2276                   ctx->def.chan->center_freq, ctx->def.width,
2277                   ctx->def.center_freq1, ctx->def.center_freq2);
2278         hwsim_check_chanctx_magic(ctx);
2279         hwsim_clear_chanctx_magic(ctx);
2280 }
2281
2282 static void mac80211_hwsim_change_chanctx(struct ieee80211_hw *hw,
2283                                           struct ieee80211_chanctx_conf *ctx,
2284                                           u32 changed)
2285 {
2286         hwsim_check_chanctx_magic(ctx);
2287         wiphy_dbg(hw->wiphy,
2288                   "change channel context control: %d MHz/width: %d/cfreqs:%d/%d MHz\n",
2289                   ctx->def.chan->center_freq, ctx->def.width,
2290                   ctx->def.center_freq1, ctx->def.center_freq2);
2291 }
2292
2293 static int mac80211_hwsim_assign_vif_chanctx(struct ieee80211_hw *hw,
2294                                              struct ieee80211_vif *vif,
2295                                              struct ieee80211_chanctx_conf *ctx)
2296 {
2297         hwsim_check_magic(vif);
2298         hwsim_check_chanctx_magic(ctx);
2299
2300         return 0;
2301 }
2302
2303 static void mac80211_hwsim_unassign_vif_chanctx(struct ieee80211_hw *hw,
2304                                                 struct ieee80211_vif *vif,
2305                                                 struct ieee80211_chanctx_conf *ctx)
2306 {
2307         hwsim_check_magic(vif);
2308         hwsim_check_chanctx_magic(ctx);
2309 }
2310
2311 static const char mac80211_hwsim_gstrings_stats[][ETH_GSTRING_LEN] = {
2312         "tx_pkts_nic",
2313         "tx_bytes_nic",
2314         "rx_pkts_nic",
2315         "rx_bytes_nic",
2316         "d_tx_dropped",
2317         "d_tx_failed",
2318         "d_ps_mode",
2319         "d_group",
2320 };
2321
2322 #define MAC80211_HWSIM_SSTATS_LEN ARRAY_SIZE(mac80211_hwsim_gstrings_stats)
2323
2324 static void mac80211_hwsim_get_et_strings(struct ieee80211_hw *hw,
2325                                           struct ieee80211_vif *vif,
2326                                           u32 sset, u8 *data)
2327 {
2328         if (sset == ETH_SS_STATS)
2329                 memcpy(data, *mac80211_hwsim_gstrings_stats,
2330                        sizeof(mac80211_hwsim_gstrings_stats));
2331 }
2332
2333 static int mac80211_hwsim_get_et_sset_count(struct ieee80211_hw *hw,
2334                                             struct ieee80211_vif *vif, int sset)
2335 {
2336         if (sset == ETH_SS_STATS)
2337                 return MAC80211_HWSIM_SSTATS_LEN;
2338         return 0;
2339 }
2340
2341 static void mac80211_hwsim_get_et_stats(struct ieee80211_hw *hw,
2342                                         struct ieee80211_vif *vif,
2343                                         struct ethtool_stats *stats, u64 *data)
2344 {
2345         struct mac80211_hwsim_data *ar = hw->priv;
2346         int i = 0;
2347
2348         data[i++] = ar->tx_pkts;
2349         data[i++] = ar->tx_bytes;
2350         data[i++] = ar->rx_pkts;
2351         data[i++] = ar->rx_bytes;
2352         data[i++] = ar->tx_dropped;
2353         data[i++] = ar->tx_failed;
2354         data[i++] = ar->ps;
2355         data[i++] = ar->group;
2356
2357         WARN_ON(i != MAC80211_HWSIM_SSTATS_LEN);
2358 }
2359
2360 #define HWSIM_COMMON_OPS                                        \
2361         .tx = mac80211_hwsim_tx,                                \
2362         .start = mac80211_hwsim_start,                          \
2363         .stop = mac80211_hwsim_stop,                            \
2364         .add_interface = mac80211_hwsim_add_interface,          \
2365         .change_interface = mac80211_hwsim_change_interface,    \
2366         .remove_interface = mac80211_hwsim_remove_interface,    \
2367         .config = mac80211_hwsim_config,                        \
2368         .configure_filter = mac80211_hwsim_configure_filter,    \
2369         .bss_info_changed = mac80211_hwsim_bss_info_changed,    \
2370         .sta_add = mac80211_hwsim_sta_add,                      \
2371         .sta_remove = mac80211_hwsim_sta_remove,                \
2372         .sta_notify = mac80211_hwsim_sta_notify,                \
2373         .set_tim = mac80211_hwsim_set_tim,                      \
2374         .conf_tx = mac80211_hwsim_conf_tx,                      \
2375         .get_survey = mac80211_hwsim_get_survey,                \
2376         CFG80211_TESTMODE_CMD(mac80211_hwsim_testmode_cmd)      \
2377         .ampdu_action = mac80211_hwsim_ampdu_action,            \
2378         .flush = mac80211_hwsim_flush,                          \
2379         .get_tsf = mac80211_hwsim_get_tsf,                      \
2380         .set_tsf = mac80211_hwsim_set_tsf,                      \
2381         .get_et_sset_count = mac80211_hwsim_get_et_sset_count,  \
2382         .get_et_stats = mac80211_hwsim_get_et_stats,            \
2383         .get_et_strings = mac80211_hwsim_get_et_strings,
2384
2385 static const struct ieee80211_ops mac80211_hwsim_ops = {
2386         HWSIM_COMMON_OPS
2387         .sw_scan_start = mac80211_hwsim_sw_scan,
2388         .sw_scan_complete = mac80211_hwsim_sw_scan_complete,
2389 };
2390
2391 static const struct ieee80211_ops mac80211_hwsim_mchan_ops = {
2392         HWSIM_COMMON_OPS
2393         .hw_scan = mac80211_hwsim_hw_scan,
2394         .cancel_hw_scan = mac80211_hwsim_cancel_hw_scan,
2395         .sw_scan_start = NULL,
2396         .sw_scan_complete = NULL,
2397         .remain_on_channel = mac80211_hwsim_roc,
2398         .cancel_remain_on_channel = mac80211_hwsim_croc,
2399         .add_chanctx = mac80211_hwsim_add_chanctx,
2400         .remove_chanctx = mac80211_hwsim_remove_chanctx,
2401         .change_chanctx = mac80211_hwsim_change_chanctx,
2402         .assign_vif_chanctx = mac80211_hwsim_assign_vif_chanctx,
2403         .unassign_vif_chanctx = mac80211_hwsim_unassign_vif_chanctx,
2404 };
2405
2406 struct hwsim_new_radio_params {
2407         unsigned int channels;
2408         const char *reg_alpha2;
2409         const struct ieee80211_regdomain *regd;
2410         bool reg_strict;
2411         bool p2p_device;
2412         bool use_chanctx;
2413         bool destroy_on_close;
2414         const char *hwname;
2415         bool no_vif;
2416         const u8 *perm_addr;
2417 };
2418
2419 static void hwsim_mcast_config_msg(struct sk_buff *mcast_skb,
2420                                    struct genl_info *info)
2421 {
2422         if (info)
2423                 genl_notify(&hwsim_genl_family, mcast_skb, info,
2424                             HWSIM_MCGRP_CONFIG, GFP_KERNEL);
2425         else
2426                 genlmsg_multicast(&hwsim_genl_family, mcast_skb, 0,
2427                                   HWSIM_MCGRP_CONFIG, GFP_KERNEL);
2428 }
2429
2430 static int append_radio_msg(struct sk_buff *skb, int id,
2431                             struct hwsim_new_radio_params *param)
2432 {
2433         int ret;
2434
2435         ret = nla_put_u32(skb, HWSIM_ATTR_RADIO_ID, id);
2436         if (ret < 0)
2437                 return ret;
2438
2439         if (param->channels) {
2440                 ret = nla_put_u32(skb, HWSIM_ATTR_CHANNELS, param->channels);
2441                 if (ret < 0)
2442                         return ret;
2443         }
2444
2445         if (param->reg_alpha2) {
2446                 ret = nla_put(skb, HWSIM_ATTR_REG_HINT_ALPHA2, 2,
2447                               param->reg_alpha2);
2448                 if (ret < 0)
2449                         return ret;
2450         }
2451
2452         if (param->regd) {
2453                 int i;
2454
2455                 for (i = 0; i < ARRAY_SIZE(hwsim_world_regdom_custom); i++) {
2456                         if (hwsim_world_regdom_custom[i] != param->regd)
2457                                 continue;
2458
2459                         ret = nla_put_u32(skb, HWSIM_ATTR_REG_CUSTOM_REG, i);
2460                         if (ret < 0)
2461                                 return ret;
2462                         break;
2463                 }
2464         }
2465
2466         if (param->reg_strict) {
2467                 ret = nla_put_flag(skb, HWSIM_ATTR_REG_STRICT_REG);
2468                 if (ret < 0)
2469                         return ret;
2470         }
2471
2472         if (param->p2p_device) {
2473                 ret = nla_put_flag(skb, HWSIM_ATTR_SUPPORT_P2P_DEVICE);
2474                 if (ret < 0)
2475                         return ret;
2476         }
2477
2478         if (param->use_chanctx) {
2479                 ret = nla_put_flag(skb, HWSIM_ATTR_USE_CHANCTX);
2480                 if (ret < 0)
2481                         return ret;
2482         }
2483
2484         if (param->hwname) {
2485                 ret = nla_put(skb, HWSIM_ATTR_RADIO_NAME,
2486                               strlen(param->hwname), param->hwname);
2487                 if (ret < 0)
2488                         return ret;
2489         }
2490
2491         return 0;
2492 }
2493
2494 static void hwsim_mcast_new_radio(int id, struct genl_info *info,
2495                                   struct hwsim_new_radio_params *param)
2496 {
2497         struct sk_buff *mcast_skb;
2498         void *data;
2499
2500         mcast_skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2501         if (!mcast_skb)
2502                 return;
2503
2504         data = genlmsg_put(mcast_skb, 0, 0, &hwsim_genl_family, 0,
2505                            HWSIM_CMD_NEW_RADIO);
2506         if (!data)
2507                 goto out_err;
2508
2509         if (append_radio_msg(mcast_skb, id, param) < 0)
2510                 goto out_err;
2511
2512         genlmsg_end(mcast_skb, data);
2513
2514         hwsim_mcast_config_msg(mcast_skb, info);
2515         return;
2516
2517 out_err:
2518         nlmsg_free(mcast_skb);
2519 }
2520
2521 static const struct ieee80211_sband_iftype_data he_capa_2ghz = {
2522         /* TODO: should we support other types, e.g., P2P?*/
2523         .types_mask = BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_AP),
2524         .he_cap = {
2525                 .has_he = true,
2526                 .he_cap_elem = {
2527                         .mac_cap_info[0] =
2528                                 IEEE80211_HE_MAC_CAP0_HTC_HE,
2529                         .mac_cap_info[1] =
2530                                 IEEE80211_HE_MAC_CAP1_TF_MAC_PAD_DUR_16US |
2531                                 IEEE80211_HE_MAC_CAP1_MULTI_TID_AGG_RX_QOS_8,
2532                         .mac_cap_info[2] =
2533                                 IEEE80211_HE_MAC_CAP2_BSR |
2534                                 IEEE80211_HE_MAC_CAP2_MU_CASCADING |
2535                                 IEEE80211_HE_MAC_CAP2_ACK_EN,
2536                         .mac_cap_info[3] =
2537                                 IEEE80211_HE_MAC_CAP3_OMI_CONTROL |
2538                                 IEEE80211_HE_MAC_CAP3_MAX_AMPDU_LEN_EXP_VHT_2,
2539                         .mac_cap_info[4] = IEEE80211_HE_MAC_CAP4_AMDSU_IN_AMPDU,
2540                         .phy_cap_info[1] =
2541                                 IEEE80211_HE_PHY_CAP1_PREAMBLE_PUNC_RX_MASK |
2542                                 IEEE80211_HE_PHY_CAP1_DEVICE_CLASS_A |
2543                                 IEEE80211_HE_PHY_CAP1_LDPC_CODING_IN_PAYLOAD |
2544                                 IEEE80211_HE_PHY_CAP1_MIDAMBLE_RX_TX_MAX_NSTS,
2545                         .phy_cap_info[2] =
2546                                 IEEE80211_HE_PHY_CAP2_NDP_4x_LTF_AND_3_2US |
2547                                 IEEE80211_HE_PHY_CAP2_STBC_TX_UNDER_80MHZ |
2548                                 IEEE80211_HE_PHY_CAP2_STBC_RX_UNDER_80MHZ |
2549                                 IEEE80211_HE_PHY_CAP2_UL_MU_FULL_MU_MIMO |
2550                                 IEEE80211_HE_PHY_CAP2_UL_MU_PARTIAL_MU_MIMO,
2551
2552                         /* Leave all the other PHY capability bytes unset, as
2553                          * DCM, beam forming, RU and PPE threshold information
2554                          * are not supported
2555                          */
2556                 },
2557                 .he_mcs_nss_supp = {
2558                         .rx_mcs_80 = cpu_to_le16(0xfffa),
2559                         .tx_mcs_80 = cpu_to_le16(0xfffa),
2560                         .rx_mcs_160 = cpu_to_le16(0xffff),
2561                         .tx_mcs_160 = cpu_to_le16(0xffff),
2562                         .rx_mcs_80p80 = cpu_to_le16(0xffff),
2563                         .tx_mcs_80p80 = cpu_to_le16(0xffff),
2564                 },
2565         },
2566 };
2567
2568 static const struct ieee80211_sband_iftype_data he_capa_5ghz = {
2569         /* TODO: should we support other types, e.g., P2P?*/
2570         .types_mask = BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_AP),
2571         .he_cap = {
2572                 .has_he = true,
2573                 .he_cap_elem = {
2574                         .mac_cap_info[0] =
2575                                 IEEE80211_HE_MAC_CAP0_HTC_HE,
2576                         .mac_cap_info[1] =
2577                                 IEEE80211_HE_MAC_CAP1_TF_MAC_PAD_DUR_16US |
2578                                 IEEE80211_HE_MAC_CAP1_MULTI_TID_AGG_RX_QOS_8,
2579                         .mac_cap_info[2] =
2580                                 IEEE80211_HE_MAC_CAP2_BSR |
2581                                 IEEE80211_HE_MAC_CAP2_MU_CASCADING |
2582                                 IEEE80211_HE_MAC_CAP2_ACK_EN,
2583                         .mac_cap_info[3] =
2584                                 IEEE80211_HE_MAC_CAP3_OMI_CONTROL |
2585                                 IEEE80211_HE_MAC_CAP3_MAX_AMPDU_LEN_EXP_VHT_2,
2586                         .mac_cap_info[4] = IEEE80211_HE_MAC_CAP4_AMDSU_IN_AMPDU,
2587                         .phy_cap_info[0] =
2588                                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G |
2589                                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G |
2590                                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G,
2591                         .phy_cap_info[1] =
2592                                 IEEE80211_HE_PHY_CAP1_PREAMBLE_PUNC_RX_MASK |
2593                                 IEEE80211_HE_PHY_CAP1_DEVICE_CLASS_A |
2594                                 IEEE80211_HE_PHY_CAP1_LDPC_CODING_IN_PAYLOAD |
2595                                 IEEE80211_HE_PHY_CAP1_MIDAMBLE_RX_TX_MAX_NSTS,
2596                         .phy_cap_info[2] =
2597                                 IEEE80211_HE_PHY_CAP2_NDP_4x_LTF_AND_3_2US |
2598                                 IEEE80211_HE_PHY_CAP2_STBC_TX_UNDER_80MHZ |
2599                                 IEEE80211_HE_PHY_CAP2_STBC_RX_UNDER_80MHZ |
2600                                 IEEE80211_HE_PHY_CAP2_UL_MU_FULL_MU_MIMO |
2601                                 IEEE80211_HE_PHY_CAP2_UL_MU_PARTIAL_MU_MIMO,
2602
2603                         /* Leave all the other PHY capability bytes unset, as
2604                          * DCM, beam forming, RU and PPE threshold information
2605                          * are not supported
2606                          */
2607                 },
2608                 .he_mcs_nss_supp = {
2609                         .rx_mcs_80 = cpu_to_le16(0xfffa),
2610                         .tx_mcs_80 = cpu_to_le16(0xfffa),
2611                         .rx_mcs_160 = cpu_to_le16(0xfffa),
2612                         .tx_mcs_160 = cpu_to_le16(0xfffa),
2613                         .rx_mcs_80p80 = cpu_to_le16(0xfffa),
2614                         .tx_mcs_80p80 = cpu_to_le16(0xfffa),
2615                 },
2616         },
2617 };
2618
2619 static void mac80211_hswim_he_capab(struct ieee80211_supported_band *sband)
2620 {
2621         if (sband->band == NL80211_BAND_2GHZ)
2622                 sband->iftype_data =
2623                         (struct ieee80211_sband_iftype_data *)&he_capa_2ghz;
2624         else if (sband->band == NL80211_BAND_5GHZ)
2625                 sband->iftype_data =
2626                         (struct ieee80211_sband_iftype_data *)&he_capa_5ghz;
2627         else
2628                 return;
2629
2630         sband->n_iftype_data = 1;
2631 }
2632
2633 static int mac80211_hwsim_new_radio(struct genl_info *info,
2634                                     struct hwsim_new_radio_params *param)
2635 {
2636         int err;
2637         u8 addr[ETH_ALEN];
2638         struct mac80211_hwsim_data *data;
2639         struct ieee80211_hw *hw;
2640         enum nl80211_band band;
2641         const struct ieee80211_ops *ops = &mac80211_hwsim_ops;
2642         struct net *net;
2643         int idx;
2644
2645         if (WARN_ON(param->channels > 1 && !param->use_chanctx))
2646                 return -EINVAL;
2647
2648         spin_lock_bh(&hwsim_radio_lock);
2649         idx = hwsim_radio_idx++;
2650         spin_unlock_bh(&hwsim_radio_lock);
2651
2652         if (param->use_chanctx)
2653                 ops = &mac80211_hwsim_mchan_ops;
2654         hw = ieee80211_alloc_hw_nm(sizeof(*data), ops, param->hwname);
2655         if (!hw) {
2656                 pr_debug("mac80211_hwsim: ieee80211_alloc_hw failed\n");
2657                 err = -ENOMEM;
2658                 goto failed;
2659         }
2660
2661         /* ieee80211_alloc_hw_nm may have used a default name */
2662         param->hwname = wiphy_name(hw->wiphy);
2663
2664         if (info)
2665                 net = genl_info_net(info);
2666         else
2667                 net = &init_net;
2668         wiphy_net_set(hw->wiphy, net);
2669
2670         data = hw->priv;
2671         data->hw = hw;
2672
2673         data->dev = device_create(hwsim_class, NULL, 0, hw, "hwsim%d", idx);
2674         if (IS_ERR(data->dev)) {
2675                 printk(KERN_DEBUG
2676                        "mac80211_hwsim: device_create failed (%ld)\n",
2677                        PTR_ERR(data->dev));
2678                 err = -ENOMEM;
2679                 goto failed_drvdata;
2680         }
2681         data->dev->driver = &mac80211_hwsim_driver.driver;
2682         err = device_bind_driver(data->dev);
2683         if (err != 0) {
2684                 pr_debug("mac80211_hwsim: device_bind_driver failed (%d)\n",
2685                        err);
2686                 goto failed_bind;
2687         }
2688
2689         skb_queue_head_init(&data->pending);
2690
2691         SET_IEEE80211_DEV(hw, data->dev);
2692         if (!param->perm_addr) {
2693                 eth_zero_addr(addr);
2694                 addr[0] = 0x02;
2695                 addr[3] = idx >> 8;
2696                 addr[4] = idx;
2697                 memcpy(data->addresses[0].addr, addr, ETH_ALEN);
2698                 /* Why need here second address ? */
2699                 memcpy(data->addresses[1].addr, addr, ETH_ALEN);
2700                 data->addresses[1].addr[0] |= 0x40;
2701                 hw->wiphy->n_addresses = 2;
2702                 hw->wiphy->addresses = data->addresses;
2703                 /* possible address clash is checked at hash table insertion */
2704         } else {
2705                 memcpy(data->addresses[0].addr, param->perm_addr, ETH_ALEN);
2706                 /* compatibility with automatically generated mac addr */
2707                 memcpy(data->addresses[1].addr, param->perm_addr, ETH_ALEN);
2708                 hw->wiphy->n_addresses = 2;
2709                 hw->wiphy->addresses = data->addresses;
2710         }
2711
2712         data->channels = param->channels;
2713         data->use_chanctx = param->use_chanctx;
2714         data->idx = idx;
2715         data->destroy_on_close = param->destroy_on_close;
2716         if (info)
2717                 data->portid = info->snd_portid;
2718
2719         if (data->use_chanctx) {
2720                 hw->wiphy->max_scan_ssids = 255;
2721                 hw->wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
2722                 hw->wiphy->max_remain_on_channel_duration = 1000;
2723                 hw->wiphy->iface_combinations = &data->if_combination;
2724                 if (param->p2p_device)
2725                         data->if_combination = hwsim_if_comb_p2p_dev[0];
2726                 else
2727                         data->if_combination = hwsim_if_comb[0];
2728                 hw->wiphy->n_iface_combinations = 1;
2729                 /* For channels > 1 DFS is not allowed */
2730                 data->if_combination.radar_detect_widths = 0;
2731                 data->if_combination.num_different_channels = data->channels;
2732         } else if (param->p2p_device) {
2733                 hw->wiphy->iface_combinations = hwsim_if_comb_p2p_dev;
2734                 hw->wiphy->n_iface_combinations =
2735                         ARRAY_SIZE(hwsim_if_comb_p2p_dev);
2736         } else {
2737                 hw->wiphy->iface_combinations = hwsim_if_comb;
2738                 hw->wiphy->n_iface_combinations = ARRAY_SIZE(hwsim_if_comb);
2739         }
2740
2741         INIT_DELAYED_WORK(&data->roc_start, hw_roc_start);
2742         INIT_DELAYED_WORK(&data->roc_done, hw_roc_done);
2743         INIT_DELAYED_WORK(&data->hw_scan, hw_scan_work);
2744
2745         hw->queues = 5;
2746         hw->offchannel_tx_hw_queue = 4;
2747         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
2748                                      BIT(NL80211_IFTYPE_AP) |
2749                                      BIT(NL80211_IFTYPE_P2P_CLIENT) |
2750                                      BIT(NL80211_IFTYPE_P2P_GO) |
2751                                      BIT(NL80211_IFTYPE_ADHOC) |
2752                                      BIT(NL80211_IFTYPE_MESH_POINT);
2753
2754         if (param->p2p_device)
2755                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_P2P_DEVICE);
2756
2757         ieee80211_hw_set(hw, SUPPORT_FAST_XMIT);
2758         ieee80211_hw_set(hw, CHANCTX_STA_CSA);
2759         ieee80211_hw_set(hw, SUPPORTS_HT_CCK_RATES);
2760         ieee80211_hw_set(hw, QUEUE_CONTROL);
2761         ieee80211_hw_set(hw, WANT_MONITOR_VIF);
2762         ieee80211_hw_set(hw, AMPDU_AGGREGATION);
2763         ieee80211_hw_set(hw, MFP_CAPABLE);
2764         ieee80211_hw_set(hw, SIGNAL_DBM);
2765         ieee80211_hw_set(hw, SUPPORTS_PS);
2766         ieee80211_hw_set(hw, TDLS_WIDER_BW);
2767         if (rctbl)
2768                 ieee80211_hw_set(hw, SUPPORTS_RC_TABLE);
2769
2770         hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS |
2771                             WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL |
2772                             WIPHY_FLAG_AP_UAPSD |
2773                             WIPHY_FLAG_HAS_CHANNEL_SWITCH;
2774         hw->wiphy->features |= NL80211_FEATURE_ACTIVE_MONITOR |
2775                                NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE |
2776                                NL80211_FEATURE_STATIC_SMPS |
2777                                NL80211_FEATURE_DYNAMIC_SMPS |
2778                                NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR;
2779         wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_VHT_IBSS);
2780
2781         /* ask mac80211 to reserve space for magic */
2782         hw->vif_data_size = sizeof(struct hwsim_vif_priv);
2783         hw->sta_data_size = sizeof(struct hwsim_sta_priv);
2784         hw->chanctx_data_size = sizeof(struct hwsim_chanctx_priv);
2785
2786         memcpy(data->channels_2ghz, hwsim_channels_2ghz,
2787                 sizeof(hwsim_channels_2ghz));
2788         memcpy(data->channels_5ghz, hwsim_channels_5ghz,
2789                 sizeof(hwsim_channels_5ghz));
2790         memcpy(data->rates, hwsim_rates, sizeof(hwsim_rates));
2791
2792         for (band = NL80211_BAND_2GHZ; band < NUM_NL80211_BANDS; band++) {
2793                 struct ieee80211_supported_band *sband = &data->bands[band];
2794
2795                 sband->band = band;
2796
2797                 switch (band) {
2798                 case NL80211_BAND_2GHZ:
2799                         sband->channels = data->channels_2ghz;
2800                         sband->n_channels = ARRAY_SIZE(hwsim_channels_2ghz);
2801                         sband->bitrates = data->rates;
2802                         sband->n_bitrates = ARRAY_SIZE(hwsim_rates);
2803                         break;
2804                 case NL80211_BAND_5GHZ:
2805                         sband->channels = data->channels_5ghz;
2806                         sband->n_channels = ARRAY_SIZE(hwsim_channels_5ghz);
2807                         sband->bitrates = data->rates + 4;
2808                         sband->n_bitrates = ARRAY_SIZE(hwsim_rates) - 4;
2809
2810                         sband->vht_cap.vht_supported = true;
2811                         sband->vht_cap.cap =
2812                                 IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454 |
2813                                 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ |
2814                                 IEEE80211_VHT_CAP_RXLDPC |
2815                                 IEEE80211_VHT_CAP_SHORT_GI_80 |
2816                                 IEEE80211_VHT_CAP_SHORT_GI_160 |
2817                                 IEEE80211_VHT_CAP_TXSTBC |
2818                                 IEEE80211_VHT_CAP_RXSTBC_4 |
2819                                 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
2820                         sband->vht_cap.vht_mcs.rx_mcs_map =
2821                                 cpu_to_le16(IEEE80211_VHT_MCS_SUPPORT_0_9 << 0 |
2822                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 2 |
2823                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 4 |
2824                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 6 |
2825                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 8 |
2826                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 10 |
2827                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 12 |
2828                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 14);
2829                         sband->vht_cap.vht_mcs.tx_mcs_map =
2830                                 sband->vht_cap.vht_mcs.rx_mcs_map;
2831                         break;
2832                 default:
2833                         continue;
2834                 }
2835
2836                 sband->ht_cap.ht_supported = true;
2837                 sband->ht_cap.cap = IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
2838                                     IEEE80211_HT_CAP_GRN_FLD |
2839                                     IEEE80211_HT_CAP_SGI_20 |
2840                                     IEEE80211_HT_CAP_SGI_40 |
2841                                     IEEE80211_HT_CAP_DSSSCCK40;
2842                 sband->ht_cap.ampdu_factor = 0x3;
2843                 sband->ht_cap.ampdu_density = 0x6;
2844                 memset(&sband->ht_cap.mcs, 0,
2845                        sizeof(sband->ht_cap.mcs));
2846                 sband->ht_cap.mcs.rx_mask[0] = 0xff;
2847                 sband->ht_cap.mcs.rx_mask[1] = 0xff;
2848                 sband->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
2849
2850                 mac80211_hswim_he_capab(sband);
2851
2852                 hw->wiphy->bands[band] = sband;
2853         }
2854
2855         /* By default all radios belong to the first group */
2856         data->group = 1;
2857         mutex_init(&data->mutex);
2858
2859         data->netgroup = hwsim_net_get_netgroup(net);
2860         data->wmediumd = hwsim_net_get_wmediumd(net);
2861
2862         /* Enable frame retransmissions for lossy channels */
2863         hw->max_rates = 4;
2864         hw->max_rate_tries = 11;
2865
2866         hw->wiphy->vendor_commands = mac80211_hwsim_vendor_commands;
2867         hw->wiphy->n_vendor_commands =
2868                 ARRAY_SIZE(mac80211_hwsim_vendor_commands);
2869         hw->wiphy->vendor_events = mac80211_hwsim_vendor_events;
2870         hw->wiphy->n_vendor_events = ARRAY_SIZE(mac80211_hwsim_vendor_events);
2871
2872         if (param->reg_strict)
2873                 hw->wiphy->regulatory_flags |= REGULATORY_STRICT_REG;
2874         if (param->regd) {
2875                 data->regd = param->regd;
2876                 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG;
2877                 wiphy_apply_custom_regulatory(hw->wiphy, param->regd);
2878                 /* give the regulatory workqueue a chance to run */
2879                 schedule_timeout_interruptible(1);
2880         }
2881
2882         if (param->no_vif)
2883                 ieee80211_hw_set(hw, NO_AUTO_VIF);
2884
2885         wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
2886
2887         err = ieee80211_register_hw(hw);
2888         if (err < 0) {
2889                 pr_debug("mac80211_hwsim: ieee80211_register_hw failed (%d)\n",
2890                        err);
2891                 goto failed_hw;
2892         }
2893
2894         wiphy_dbg(hw->wiphy, "hwaddr %pM registered\n", hw->wiphy->perm_addr);
2895
2896         if (param->reg_alpha2) {
2897                 data->alpha2[0] = param->reg_alpha2[0];
2898                 data->alpha2[1] = param->reg_alpha2[1];
2899                 regulatory_hint(hw->wiphy, param->reg_alpha2);
2900         }
2901
2902         data->debugfs = debugfs_create_dir("hwsim", hw->wiphy->debugfsdir);
2903         debugfs_create_file("ps", 0666, data->debugfs, data, &hwsim_fops_ps);
2904         debugfs_create_file("group", 0666, data->debugfs, data,
2905                             &hwsim_fops_group);
2906         if (!data->use_chanctx)
2907                 debugfs_create_file("dfs_simulate_radar", 0222,
2908                                     data->debugfs,
2909                                     data, &hwsim_simulate_radar);
2910
2911         tasklet_hrtimer_init(&data->beacon_timer,
2912                              mac80211_hwsim_beacon,
2913                              CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2914
2915         spin_lock_bh(&hwsim_radio_lock);
2916         err = rhashtable_insert_fast(&hwsim_radios_rht, &data->rht,
2917                                      hwsim_rht_params);
2918         if (err < 0) {
2919                 if (info) {
2920                         GENL_SET_ERR_MSG(info, "perm addr already present");
2921                         NL_SET_BAD_ATTR(info->extack,
2922                                         info->attrs[HWSIM_ATTR_PERM_ADDR]);
2923                 }
2924                 spin_unlock_bh(&hwsim_radio_lock);
2925                 goto failed_final_insert;
2926         }
2927
2928         list_add_tail(&data->list, &hwsim_radios);
2929         hwsim_radios_generation++;
2930         spin_unlock_bh(&hwsim_radio_lock);
2931
2932         hwsim_mcast_new_radio(idx, info, param);
2933
2934         return idx;
2935
2936 failed_final_insert:
2937         debugfs_remove_recursive(data->debugfs);
2938         ieee80211_unregister_hw(data->hw);
2939 failed_hw:
2940         device_release_driver(data->dev);
2941 failed_bind:
2942         device_unregister(data->dev);
2943 failed_drvdata:
2944         ieee80211_free_hw(hw);
2945 failed:
2946         return err;
2947 }
2948
2949 static void hwsim_mcast_del_radio(int id, const char *hwname,
2950                                   struct genl_info *info)
2951 {
2952         struct sk_buff *skb;
2953         void *data;
2954         int ret;
2955
2956         skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2957         if (!skb)
2958                 return;
2959
2960         data = genlmsg_put(skb, 0, 0, &hwsim_genl_family, 0,
2961                            HWSIM_CMD_DEL_RADIO);
2962         if (!data)
2963                 goto error;
2964
2965         ret = nla_put_u32(skb, HWSIM_ATTR_RADIO_ID, id);
2966         if (ret < 0)
2967                 goto error;
2968
2969         ret = nla_put(skb, HWSIM_ATTR_RADIO_NAME, strlen(hwname),
2970                       hwname);
2971         if (ret < 0)
2972                 goto error;
2973
2974         genlmsg_end(skb, data);
2975
2976         hwsim_mcast_config_msg(skb, info);
2977
2978         return;
2979
2980 error:
2981         nlmsg_free(skb);
2982 }
2983
2984 static void mac80211_hwsim_del_radio(struct mac80211_hwsim_data *data,
2985                                      const char *hwname,
2986                                      struct genl_info *info)
2987 {
2988         hwsim_mcast_del_radio(data->idx, hwname, info);
2989         debugfs_remove_recursive(data->debugfs);
2990         ieee80211_unregister_hw(data->hw);
2991         device_release_driver(data->dev);
2992         device_unregister(data->dev);
2993         ieee80211_free_hw(data->hw);
2994 }
2995
2996 static int mac80211_hwsim_get_radio(struct sk_buff *skb,
2997                                     struct mac80211_hwsim_data *data,
2998                                     u32 portid, u32 seq,
2999                                     struct netlink_callback *cb, int flags)
3000 {
3001         void *hdr;
3002         struct hwsim_new_radio_params param = { };
3003         int res = -EMSGSIZE;
3004
3005         hdr = genlmsg_put(skb, portid, seq, &hwsim_genl_family, flags,
3006                           HWSIM_CMD_GET_RADIO);
3007         if (!hdr)
3008                 return -EMSGSIZE;
3009
3010         if (cb)
3011                 genl_dump_check_consistent(cb, hdr);
3012
3013         if (data->alpha2[0] && data->alpha2[1])
3014                 param.reg_alpha2 = data->alpha2;
3015
3016         param.reg_strict = !!(data->hw->wiphy->regulatory_flags &
3017                                         REGULATORY_STRICT_REG);
3018         param.p2p_device = !!(data->hw->wiphy->interface_modes &
3019                                         BIT(NL80211_IFTYPE_P2P_DEVICE));
3020         param.use_chanctx = data->use_chanctx;
3021         param.regd = data->regd;
3022         param.channels = data->channels;
3023         param.hwname = wiphy_name(data->hw->wiphy);
3024
3025         res = append_radio_msg(skb, data->idx, &param);
3026         if (res < 0)
3027                 goto out_err;
3028
3029         genlmsg_end(skb, hdr);
3030         return 0;
3031
3032 out_err:
3033         genlmsg_cancel(skb, hdr);
3034         return res;
3035 }
3036
3037 static void mac80211_hwsim_free(void)
3038 {
3039         struct mac80211_hwsim_data *data;
3040
3041         spin_lock_bh(&hwsim_radio_lock);
3042         while ((data = list_first_entry_or_null(&hwsim_radios,
3043                                                 struct mac80211_hwsim_data,
3044                                                 list))) {
3045                 list_del(&data->list);
3046                 spin_unlock_bh(&hwsim_radio_lock);
3047                 mac80211_hwsim_del_radio(data, wiphy_name(data->hw->wiphy),
3048                                          NULL);
3049                 spin_lock_bh(&hwsim_radio_lock);
3050         }
3051         spin_unlock_bh(&hwsim_radio_lock);
3052         class_destroy(hwsim_class);
3053 }
3054
3055 static const struct net_device_ops hwsim_netdev_ops = {
3056         .ndo_start_xmit         = hwsim_mon_xmit,
3057         .ndo_set_mac_address    = eth_mac_addr,
3058         .ndo_validate_addr      = eth_validate_addr,
3059 };
3060
3061 static void hwsim_mon_setup(struct net_device *dev)
3062 {
3063         dev->netdev_ops = &hwsim_netdev_ops;
3064         dev->needs_free_netdev = true;
3065         ether_setup(dev);
3066         dev->priv_flags |= IFF_NO_QUEUE;
3067         dev->type = ARPHRD_IEEE80211_RADIOTAP;
3068         eth_zero_addr(dev->dev_addr);
3069         dev->dev_addr[0] = 0x12;
3070 }
3071
3072 static struct mac80211_hwsim_data *get_hwsim_data_ref_from_addr(const u8 *addr)
3073 {
3074         return rhashtable_lookup_fast(&hwsim_radios_rht,
3075                                       addr,
3076                                       hwsim_rht_params);
3077 }
3078
3079 static void hwsim_register_wmediumd(struct net *net, u32 portid)
3080 {
3081         struct mac80211_hwsim_data *data;
3082
3083         hwsim_net_set_wmediumd(net, portid);
3084
3085         spin_lock_bh(&hwsim_radio_lock);
3086         list_for_each_entry(data, &hwsim_radios, list) {
3087                 if (data->netgroup == hwsim_net_get_netgroup(net))
3088                         data->wmediumd = portid;
3089         }
3090         spin_unlock_bh(&hwsim_radio_lock);
3091 }
3092
3093 static int hwsim_tx_info_frame_received_nl(struct sk_buff *skb_2,
3094                                            struct genl_info *info)
3095 {
3096
3097         struct ieee80211_hdr *hdr;
3098         struct mac80211_hwsim_data *data2;
3099         struct ieee80211_tx_info *txi;
3100         struct hwsim_tx_rate *tx_attempts;
3101         u64 ret_skb_cookie;
3102         struct sk_buff *skb, *tmp;
3103         const u8 *src;
3104         unsigned int hwsim_flags;
3105         int i;
3106         bool found = false;
3107
3108         if (!info->attrs[HWSIM_ATTR_ADDR_TRANSMITTER] ||
3109             !info->attrs[HWSIM_ATTR_FLAGS] ||
3110             !info->attrs[HWSIM_ATTR_COOKIE] ||
3111             !info->attrs[HWSIM_ATTR_SIGNAL] ||
3112             !info->attrs[HWSIM_ATTR_TX_INFO])
3113                 goto out;
3114
3115         src = (void *)nla_data(info->attrs[HWSIM_ATTR_ADDR_TRANSMITTER]);
3116         hwsim_flags = nla_get_u32(info->attrs[HWSIM_ATTR_FLAGS]);
3117         ret_skb_cookie = nla_get_u64(info->attrs[HWSIM_ATTR_COOKIE]);
3118
3119         data2 = get_hwsim_data_ref_from_addr(src);
3120         if (!data2)
3121                 goto out;
3122
3123         if (hwsim_net_get_netgroup(genl_info_net(info)) != data2->netgroup)
3124                 goto out;
3125
3126         if (info->snd_portid != data2->wmediumd)
3127                 goto out;
3128
3129         /* look for the skb matching the cookie passed back from user */
3130         skb_queue_walk_safe(&data2->pending, skb, tmp) {
3131                 u64 skb_cookie;
3132
3133                 txi = IEEE80211_SKB_CB(skb);
3134                 skb_cookie = (u64)(uintptr_t)txi->rate_driver_data[0];
3135
3136                 if (skb_cookie == ret_skb_cookie) {
3137                         skb_unlink(skb, &data2->pending);
3138                         found = true;
3139                         break;
3140                 }
3141         }
3142
3143         /* not found */
3144         if (!found)
3145                 goto out;
3146
3147         /* Tx info received because the frame was broadcasted on user space,
3148          so we get all the necessary info: tx attempts and skb control buff */
3149
3150         tx_attempts = (struct hwsim_tx_rate *)nla_data(
3151                        info->attrs[HWSIM_ATTR_TX_INFO]);
3152
3153         /* now send back TX status */
3154         txi = IEEE80211_SKB_CB(skb);
3155
3156         ieee80211_tx_info_clear_status(txi);
3157
3158         for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
3159                 txi->status.rates[i].idx = tx_attempts[i].idx;
3160                 txi->status.rates[i].count = tx_attempts[i].count;
3161         }
3162
3163         txi->status.ack_signal = nla_get_u32(info->attrs[HWSIM_ATTR_SIGNAL]);
3164
3165         if (!(hwsim_flags & HWSIM_TX_CTL_NO_ACK) &&
3166            (hwsim_flags & HWSIM_TX_STAT_ACK)) {
3167                 if (skb->len >= 16) {
3168                         hdr = (struct ieee80211_hdr *) skb->data;
3169                         mac80211_hwsim_monitor_ack(data2->channel,
3170                                                    hdr->addr2);
3171                 }
3172                 txi->flags |= IEEE80211_TX_STAT_ACK;
3173         }
3174         ieee80211_tx_status_irqsafe(data2->hw, skb);
3175         return 0;
3176 out:
3177         return -EINVAL;
3178
3179 }
3180
3181 static int hwsim_cloned_frame_received_nl(struct sk_buff *skb_2,
3182                                           struct genl_info *info)
3183 {
3184         struct mac80211_hwsim_data *data2;
3185         struct ieee80211_rx_status rx_status;
3186         const u8 *dst;
3187         int frame_data_len;
3188         void *frame_data;
3189         struct sk_buff *skb = NULL;
3190
3191         if (!info->attrs[HWSIM_ATTR_ADDR_RECEIVER] ||
3192             !info->attrs[HWSIM_ATTR_FRAME] ||
3193             !info->attrs[HWSIM_ATTR_RX_RATE] ||
3194             !info->attrs[HWSIM_ATTR_SIGNAL])
3195                 goto out;
3196
3197         dst = (void *)nla_data(info->attrs[HWSIM_ATTR_ADDR_RECEIVER]);
3198         frame_data_len = nla_len(info->attrs[HWSIM_ATTR_FRAME]);
3199         frame_data = (void *)nla_data(info->attrs[HWSIM_ATTR_FRAME]);
3200
3201         /* Allocate new skb here */
3202         skb = alloc_skb(frame_data_len, GFP_KERNEL);
3203         if (skb == NULL)
3204                 goto err;
3205
3206         if (frame_data_len > IEEE80211_MAX_DATA_LEN)
3207                 goto err;
3208
3209         /* Copy the data */
3210         skb_put_data(skb, frame_data, frame_data_len);
3211
3212         data2 = get_hwsim_data_ref_from_addr(dst);
3213         if (!data2)
3214                 goto out;
3215
3216         if (hwsim_net_get_netgroup(genl_info_net(info)) != data2->netgroup)
3217                 goto out;
3218
3219         if (info->snd_portid != data2->wmediumd)
3220                 goto out;
3221
3222         /* check if radio is configured properly */
3223
3224         if (data2->idle || !data2->started)
3225                 goto out;
3226
3227         /* A frame is received from user space */
3228         memset(&rx_status, 0, sizeof(rx_status));
3229         if (info->attrs[HWSIM_ATTR_FREQ]) {
3230                 /* throw away off-channel packets, but allow both the temporary
3231                  * ("hw" scan/remain-on-channel) and regular channel, since the
3232                  * internal datapath also allows this
3233                  */
3234                 mutex_lock(&data2->mutex);
3235                 rx_status.freq = nla_get_u32(info->attrs[HWSIM_ATTR_FREQ]);
3236
3237                 if (rx_status.freq != data2->channel->center_freq &&
3238                     (!data2->tmp_chan ||
3239                      rx_status.freq != data2->tmp_chan->center_freq)) {
3240                         mutex_unlock(&data2->mutex);
3241                         goto out;
3242                 }
3243                 mutex_unlock(&data2->mutex);
3244         } else {
3245                 rx_status.freq = data2->channel->center_freq;
3246         }
3247
3248         rx_status.band = data2->channel->band;
3249         rx_status.rate_idx = nla_get_u32(info->attrs[HWSIM_ATTR_RX_RATE]);
3250         rx_status.signal = nla_get_u32(info->attrs[HWSIM_ATTR_SIGNAL]);
3251
3252         memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
3253         data2->rx_pkts++;
3254         data2->rx_bytes += skb->len;
3255         ieee80211_rx_irqsafe(data2->hw, skb);
3256
3257         return 0;
3258 err:
3259         pr_debug("mac80211_hwsim: error occurred in %s\n", __func__);
3260 out:
3261         dev_kfree_skb(skb);
3262         return -EINVAL;
3263 }
3264
3265 static int hwsim_register_received_nl(struct sk_buff *skb_2,
3266                                       struct genl_info *info)
3267 {
3268         struct net *net = genl_info_net(info);
3269         struct mac80211_hwsim_data *data;
3270         int chans = 1;
3271
3272         spin_lock_bh(&hwsim_radio_lock);
3273         list_for_each_entry(data, &hwsim_radios, list)
3274                 chans = max(chans, data->channels);
3275         spin_unlock_bh(&hwsim_radio_lock);
3276
3277         /* In the future we should revise the userspace API and allow it
3278          * to set a flag that it does support multi-channel, then we can
3279          * let this pass conditionally on the flag.
3280          * For current userspace, prohibit it since it won't work right.
3281          */
3282         if (chans > 1)
3283                 return -EOPNOTSUPP;
3284
3285         if (hwsim_net_get_wmediumd(net))
3286                 return -EBUSY;
3287
3288         hwsim_register_wmediumd(net, info->snd_portid);
3289
3290         pr_debug("mac80211_hwsim: received a REGISTER, "
3291                "switching to wmediumd mode with pid %d\n", info->snd_portid);
3292
3293         return 0;
3294 }
3295
3296 static int hwsim_new_radio_nl(struct sk_buff *msg, struct genl_info *info)
3297 {
3298         struct hwsim_new_radio_params param = { 0 };
3299         const char *hwname = NULL;
3300         int ret;
3301
3302         param.reg_strict = info->attrs[HWSIM_ATTR_REG_STRICT_REG];
3303         param.p2p_device = info->attrs[HWSIM_ATTR_SUPPORT_P2P_DEVICE];
3304         param.channels = channels;
3305         param.destroy_on_close =
3306                 info->attrs[HWSIM_ATTR_DESTROY_RADIO_ON_CLOSE];
3307
3308         if (info->attrs[HWSIM_ATTR_CHANNELS])
3309                 param.channels = nla_get_u32(info->attrs[HWSIM_ATTR_CHANNELS]);
3310
3311         if (param.channels < 1) {
3312                 GENL_SET_ERR_MSG(info, "must have at least one channel");
3313                 return -EINVAL;
3314         }
3315
3316         if (param.channels > CFG80211_MAX_NUM_DIFFERENT_CHANNELS) {
3317                 GENL_SET_ERR_MSG(info, "too many channels specified");
3318                 return -EINVAL;
3319         }
3320
3321         if (info->attrs[HWSIM_ATTR_NO_VIF])
3322                 param.no_vif = true;
3323
3324         if (info->attrs[HWSIM_ATTR_RADIO_NAME]) {
3325                 hwname = kasprintf(GFP_KERNEL, "%.*s",
3326                                    nla_len(info->attrs[HWSIM_ATTR_RADIO_NAME]),
3327                                    (char *)nla_data(info->attrs[HWSIM_ATTR_RADIO_NAME]));
3328                 if (!hwname)
3329                         return -ENOMEM;
3330                 param.hwname = hwname;
3331         }
3332
3333         if (info->attrs[HWSIM_ATTR_USE_CHANCTX])
3334                 param.use_chanctx = true;
3335         else
3336                 param.use_chanctx = (param.channels > 1);
3337
3338         if (info->attrs[HWSIM_ATTR_REG_HINT_ALPHA2])
3339                 param.reg_alpha2 =
3340                         nla_data(info->attrs[HWSIM_ATTR_REG_HINT_ALPHA2]);
3341
3342         if (info->attrs[HWSIM_ATTR_REG_CUSTOM_REG]) {
3343                 u32 idx = nla_get_u32(info->attrs[HWSIM_ATTR_REG_CUSTOM_REG]);
3344
3345                 if (idx >= ARRAY_SIZE(hwsim_world_regdom_custom)) {
3346                         kfree(hwname);
3347                         return -EINVAL;
3348                 }
3349
3350                 idx = array_index_nospec(idx,
3351                                          ARRAY_SIZE(hwsim_world_regdom_custom));
3352                 param.regd = hwsim_world_regdom_custom[idx];
3353         }
3354
3355         if (info->attrs[HWSIM_ATTR_PERM_ADDR]) {
3356                 if (!is_valid_ether_addr(
3357                                 nla_data(info->attrs[HWSIM_ATTR_PERM_ADDR]))) {
3358                         GENL_SET_ERR_MSG(info,"MAC is no valid source addr");
3359                         NL_SET_BAD_ATTR(info->extack,
3360                                         info->attrs[HWSIM_ATTR_PERM_ADDR]);
3361                         kfree(hwname);
3362                         return -EINVAL;
3363                 }
3364
3365
3366                 param.perm_addr = nla_data(info->attrs[HWSIM_ATTR_PERM_ADDR]);
3367         }
3368
3369         ret = mac80211_hwsim_new_radio(info, &param);
3370         kfree(hwname);
3371         return ret;
3372 }
3373
3374 static int hwsim_del_radio_nl(struct sk_buff *msg, struct genl_info *info)
3375 {
3376         struct mac80211_hwsim_data *data;
3377         s64 idx = -1;
3378         const char *hwname = NULL;
3379
3380         if (info->attrs[HWSIM_ATTR_RADIO_ID]) {
3381                 idx = nla_get_u32(info->attrs[HWSIM_ATTR_RADIO_ID]);
3382         } else if (info->attrs[HWSIM_ATTR_RADIO_NAME]) {
3383                 hwname = kasprintf(GFP_KERNEL, "%.*s",
3384                                    nla_len(info->attrs[HWSIM_ATTR_RADIO_NAME]),
3385                                    (char *)nla_data(info->attrs[HWSIM_ATTR_RADIO_NAME]));
3386                 if (!hwname)
3387                         return -ENOMEM;
3388         } else
3389                 return -EINVAL;
3390
3391         spin_lock_bh(&hwsim_radio_lock);
3392         list_for_each_entry(data, &hwsim_radios, list) {
3393                 if (idx >= 0) {
3394                         if (data->idx != idx)
3395                                 continue;
3396                 } else {
3397                         if (!hwname ||
3398                             strcmp(hwname, wiphy_name(data->hw->wiphy)))
3399                                 continue;
3400                 }
3401
3402                 if (!net_eq(wiphy_net(data->hw->wiphy), genl_info_net(info)))
3403                         continue;
3404
3405                 list_del(&data->list);
3406                 rhashtable_remove_fast(&hwsim_radios_rht, &data->rht,
3407                                        hwsim_rht_params);
3408                 hwsim_radios_generation++;
3409                 spin_unlock_bh(&hwsim_radio_lock);
3410                 mac80211_hwsim_del_radio(data, wiphy_name(data->hw->wiphy),
3411                                          info);
3412                 kfree(hwname);
3413                 return 0;
3414         }
3415         spin_unlock_bh(&hwsim_radio_lock);
3416
3417         kfree(hwname);
3418         return -ENODEV;
3419 }
3420
3421 static int hwsim_get_radio_nl(struct sk_buff *msg, struct genl_info *info)
3422 {
3423         struct mac80211_hwsim_data *data;
3424         struct sk_buff *skb;
3425         int idx, res = -ENODEV;
3426
3427         if (!info->attrs[HWSIM_ATTR_RADIO_ID])
3428                 return -EINVAL;
3429         idx = nla_get_u32(info->attrs[HWSIM_ATTR_RADIO_ID]);
3430
3431         spin_lock_bh(&hwsim_radio_lock);
3432         list_for_each_entry(data, &hwsim_radios, list) {
3433                 if (data->idx != idx)
3434                         continue;
3435
3436                 if (!net_eq(wiphy_net(data->hw->wiphy), genl_info_net(info)))
3437                         continue;
3438
3439                 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
3440                 if (!skb) {
3441                         res = -ENOMEM;
3442                         goto out_err;
3443                 }
3444
3445                 res = mac80211_hwsim_get_radio(skb, data, info->snd_portid,
3446                                                info->snd_seq, NULL, 0);
3447                 if (res < 0) {
3448                         nlmsg_free(skb);
3449                         goto out_err;
3450                 }
3451
3452                 genlmsg_reply(skb, info);
3453                 break;
3454         }
3455
3456 out_err:
3457         spin_unlock_bh(&hwsim_radio_lock);
3458
3459         return res;
3460 }
3461
3462 static int hwsim_dump_radio_nl(struct sk_buff *skb,
3463                                struct netlink_callback *cb)
3464 {
3465         int last_idx = cb->args[0] - 1;
3466         struct mac80211_hwsim_data *data = NULL;
3467         int res = 0;
3468         void *hdr;
3469
3470         spin_lock_bh(&hwsim_radio_lock);
3471         cb->seq = hwsim_radios_generation;
3472
3473         if (last_idx >= hwsim_radio_idx-1)
3474                 goto done;
3475
3476         list_for_each_entry(data, &hwsim_radios, list) {
3477                 if (data->idx <= last_idx)
3478                         continue;
3479
3480                 if (!net_eq(wiphy_net(data->hw->wiphy), sock_net(skb->sk)))
3481                         continue;
3482
3483                 res = mac80211_hwsim_get_radio(skb, data,
3484                                                NETLINK_CB(cb->skb).portid,
3485                                                cb->nlh->nlmsg_seq, cb,
3486                                                NLM_F_MULTI);
3487                 if (res < 0)
3488                         break;
3489
3490                 last_idx = data->idx;
3491         }
3492
3493         cb->args[0] = last_idx + 1;
3494
3495         /* list changed, but no new element sent, set interrupted flag */
3496         if (skb->len == 0 && cb->prev_seq && cb->seq != cb->prev_seq) {
3497                 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid,
3498                                   cb->nlh->nlmsg_seq, &hwsim_genl_family,
3499                                   NLM_F_MULTI, HWSIM_CMD_GET_RADIO);
3500                 if (!hdr)
3501                         res = -EMSGSIZE;
3502                 genl_dump_check_consistent(cb, hdr);
3503                 genlmsg_end(skb, hdr);
3504         }
3505
3506 done:
3507         spin_unlock_bh(&hwsim_radio_lock);
3508         return res ?: skb->len;
3509 }
3510
3511 /* Generic Netlink operations array */
3512 static const struct genl_ops hwsim_ops[] = {
3513         {
3514                 .cmd = HWSIM_CMD_REGISTER,
3515                 .policy = hwsim_genl_policy,
3516                 .doit = hwsim_register_received_nl,
3517                 .flags = GENL_UNS_ADMIN_PERM,
3518         },
3519         {
3520                 .cmd = HWSIM_CMD_FRAME,
3521                 .policy = hwsim_genl_policy,
3522                 .doit = hwsim_cloned_frame_received_nl,
3523         },
3524         {
3525                 .cmd = HWSIM_CMD_TX_INFO_FRAME,
3526                 .policy = hwsim_genl_policy,
3527                 .doit = hwsim_tx_info_frame_received_nl,
3528         },
3529         {
3530                 .cmd = HWSIM_CMD_NEW_RADIO,
3531                 .policy = hwsim_genl_policy,
3532                 .doit = hwsim_new_radio_nl,
3533                 .flags = GENL_UNS_ADMIN_PERM,
3534         },
3535         {
3536                 .cmd = HWSIM_CMD_DEL_RADIO,
3537                 .policy = hwsim_genl_policy,
3538                 .doit = hwsim_del_radio_nl,
3539                 .flags = GENL_UNS_ADMIN_PERM,
3540         },
3541         {
3542                 .cmd = HWSIM_CMD_GET_RADIO,
3543                 .policy = hwsim_genl_policy,
3544                 .doit = hwsim_get_radio_nl,
3545                 .dumpit = hwsim_dump_radio_nl,
3546         },
3547 };
3548
3549 static struct genl_family hwsim_genl_family __ro_after_init = {
3550         .name = "MAC80211_HWSIM",
3551         .version = 1,
3552         .maxattr = HWSIM_ATTR_MAX,
3553         .netnsok = true,
3554         .module = THIS_MODULE,
3555         .ops = hwsim_ops,
3556         .n_ops = ARRAY_SIZE(hwsim_ops),
3557         .mcgrps = hwsim_mcgrps,
3558         .n_mcgrps = ARRAY_SIZE(hwsim_mcgrps),
3559 };
3560
3561 static void remove_user_radios(u32 portid)
3562 {
3563         struct mac80211_hwsim_data *entry, *tmp;
3564         LIST_HEAD(list);
3565
3566         spin_lock_bh(&hwsim_radio_lock);
3567         list_for_each_entry_safe(entry, tmp, &hwsim_radios, list) {
3568                 if (entry->destroy_on_close && entry->portid == portid) {
3569                         list_move(&entry->list, &list);
3570                         rhashtable_remove_fast(&hwsim_radios_rht, &entry->rht,
3571                                                hwsim_rht_params);
3572                         hwsim_radios_generation++;
3573                 }
3574         }
3575         spin_unlock_bh(&hwsim_radio_lock);
3576
3577         list_for_each_entry_safe(entry, tmp, &list, list) {
3578                 list_del(&entry->list);
3579                 mac80211_hwsim_del_radio(entry, wiphy_name(entry->hw->wiphy),
3580                                          NULL);
3581         }
3582 }
3583
3584 static int mac80211_hwsim_netlink_notify(struct notifier_block *nb,
3585                                          unsigned long state,
3586                                          void *_notify)
3587 {
3588         struct netlink_notify *notify = _notify;
3589
3590         if (state != NETLINK_URELEASE)
3591                 return NOTIFY_DONE;
3592
3593         remove_user_radios(notify->portid);
3594
3595         if (notify->portid == hwsim_net_get_wmediumd(notify->net)) {
3596                 printk(KERN_INFO "mac80211_hwsim: wmediumd released netlink"
3597                        " socket, switching to perfect channel medium\n");
3598                 hwsim_register_wmediumd(notify->net, 0);
3599         }
3600         return NOTIFY_DONE;
3601
3602 }
3603
3604 static struct notifier_block hwsim_netlink_notifier = {
3605         .notifier_call = mac80211_hwsim_netlink_notify,
3606 };
3607
3608 static int __init hwsim_init_netlink(void)
3609 {
3610         int rc;
3611
3612         printk(KERN_INFO "mac80211_hwsim: initializing netlink\n");
3613
3614         rc = genl_register_family(&hwsim_genl_family);
3615         if (rc)
3616                 goto failure;
3617
3618         rc = netlink_register_notifier(&hwsim_netlink_notifier);
3619         if (rc) {
3620                 genl_unregister_family(&hwsim_genl_family);
3621                 goto failure;
3622         }
3623
3624         return 0;
3625
3626 failure:
3627         pr_debug("mac80211_hwsim: error occurred in %s\n", __func__);
3628         return -EINVAL;
3629 }
3630
3631 static __net_init int hwsim_init_net(struct net *net)
3632 {
3633         return hwsim_net_set_netgroup(net);
3634 }
3635
3636 static void __net_exit hwsim_exit_net(struct net *net)
3637 {
3638         struct mac80211_hwsim_data *data, *tmp;
3639         LIST_HEAD(list);
3640
3641         spin_lock_bh(&hwsim_radio_lock);
3642         list_for_each_entry_safe(data, tmp, &hwsim_radios, list) {
3643                 if (!net_eq(wiphy_net(data->hw->wiphy), net))
3644                         continue;
3645
3646                 /* Radios created in init_net are returned to init_net. */
3647                 if (data->netgroup == hwsim_net_get_netgroup(&init_net))
3648                         continue;
3649
3650                 list_move(&data->list, &list);
3651                 rhashtable_remove_fast(&hwsim_radios_rht, &data->rht,
3652                                        hwsim_rht_params);
3653                 hwsim_radios_generation++;
3654         }
3655         spin_unlock_bh(&hwsim_radio_lock);
3656
3657         list_for_each_entry_safe(data, tmp, &list, list) {
3658                 list_del(&data->list);
3659                 mac80211_hwsim_del_radio(data,
3660                                          wiphy_name(data->hw->wiphy),
3661                                          NULL);
3662         }
3663
3664         ida_simple_remove(&hwsim_netgroup_ida, hwsim_net_get_netgroup(net));
3665 }
3666
3667 static struct pernet_operations hwsim_net_ops = {
3668         .init = hwsim_init_net,
3669         .exit = hwsim_exit_net,
3670         .id   = &hwsim_net_id,
3671         .size = sizeof(struct hwsim_net),
3672 };
3673
3674 static void hwsim_exit_netlink(void)
3675 {
3676         /* unregister the notifier */
3677         netlink_unregister_notifier(&hwsim_netlink_notifier);
3678         /* unregister the family */
3679         genl_unregister_family(&hwsim_genl_family);
3680 }
3681
3682 static int __init init_mac80211_hwsim(void)
3683 {
3684         int i, err;
3685
3686         if (radios < 0 || radios > 100)
3687                 return -EINVAL;
3688
3689         if (channels < 1)
3690                 return -EINVAL;
3691
3692         spin_lock_init(&hwsim_radio_lock);
3693
3694         err = rhashtable_init(&hwsim_radios_rht, &hwsim_rht_params);
3695         if (err)
3696                 return err;
3697
3698         err = register_pernet_device(&hwsim_net_ops);
3699         if (err)
3700                 goto out_free_rht;
3701
3702         err = platform_driver_register(&mac80211_hwsim_driver);
3703         if (err)
3704                 goto out_unregister_pernet;
3705
3706         hwsim_class = class_create(THIS_MODULE, "mac80211_hwsim");
3707         if (IS_ERR(hwsim_class)) {
3708                 err = PTR_ERR(hwsim_class);
3709                 goto out_unregister_driver;
3710         }
3711
3712         err = hwsim_init_netlink();
3713         if (err < 0)
3714                 goto out_unregister_driver;
3715
3716         for (i = 0; i < radios; i++) {
3717                 struct hwsim_new_radio_params param = { 0 };
3718
3719                 param.channels = channels;
3720
3721                 switch (regtest) {
3722                 case HWSIM_REGTEST_DIFF_COUNTRY:
3723                         if (i < ARRAY_SIZE(hwsim_alpha2s))
3724                                 param.reg_alpha2 = hwsim_alpha2s[i];
3725                         break;
3726                 case HWSIM_REGTEST_DRIVER_REG_FOLLOW:
3727                         if (!i)
3728                                 param.reg_alpha2 = hwsim_alpha2s[0];
3729                         break;
3730                 case HWSIM_REGTEST_STRICT_ALL:
3731                         param.reg_strict = true;
3732                 case HWSIM_REGTEST_DRIVER_REG_ALL:
3733                         param.reg_alpha2 = hwsim_alpha2s[0];
3734                         break;
3735                 case HWSIM_REGTEST_WORLD_ROAM:
3736                         if (i == 0)
3737                                 param.regd = &hwsim_world_regdom_custom_01;
3738                         break;
3739                 case HWSIM_REGTEST_CUSTOM_WORLD:
3740                         param.regd = &hwsim_world_regdom_custom_01;
3741                         break;
3742                 case HWSIM_REGTEST_CUSTOM_WORLD_2:
3743                         if (i == 0)
3744                                 param.regd = &hwsim_world_regdom_custom_01;
3745                         else if (i == 1)
3746                                 param.regd = &hwsim_world_regdom_custom_02;
3747                         break;
3748                 case HWSIM_REGTEST_STRICT_FOLLOW:
3749                         if (i == 0) {
3750                                 param.reg_strict = true;
3751                                 param.reg_alpha2 = hwsim_alpha2s[0];
3752                         }
3753                         break;
3754                 case HWSIM_REGTEST_STRICT_AND_DRIVER_REG:
3755                         if (i == 0) {
3756                                 param.reg_strict = true;
3757                                 param.reg_alpha2 = hwsim_alpha2s[0];
3758                         } else if (i == 1) {
3759                                 param.reg_alpha2 = hwsim_alpha2s[1];
3760                         }
3761                         break;
3762                 case HWSIM_REGTEST_ALL:
3763                         switch (i) {
3764                         case 0:
3765                                 param.regd = &hwsim_world_regdom_custom_01;
3766                                 break;
3767                         case 1:
3768                                 param.regd = &hwsim_world_regdom_custom_02;
3769                                 break;
3770                         case 2:
3771                                 param.reg_alpha2 = hwsim_alpha2s[0];
3772                                 break;
3773                         case 3:
3774                                 param.reg_alpha2 = hwsim_alpha2s[1];
3775                                 break;
3776                         case 4:
3777                                 param.reg_strict = true;
3778                                 param.reg_alpha2 = hwsim_alpha2s[2];
3779                                 break;
3780                         }
3781                         break;
3782                 default:
3783                         break;
3784                 }
3785
3786                 param.p2p_device = support_p2p_device;
3787                 param.use_chanctx = channels > 1;
3788
3789                 err = mac80211_hwsim_new_radio(NULL, &param);
3790                 if (err < 0)
3791                         goto out_free_radios;
3792         }
3793
3794         hwsim_mon = alloc_netdev(0, "hwsim%d", NET_NAME_UNKNOWN,
3795                                  hwsim_mon_setup);
3796         if (hwsim_mon == NULL) {
3797                 err = -ENOMEM;
3798                 goto out_free_radios;
3799         }
3800
3801         rtnl_lock();
3802         err = dev_alloc_name(hwsim_mon, hwsim_mon->name);
3803         if (err < 0) {
3804                 rtnl_unlock();
3805                 goto out_free_radios;
3806         }
3807
3808         err = register_netdevice(hwsim_mon);
3809         if (err < 0) {
3810                 rtnl_unlock();
3811                 goto out_free_mon;
3812         }
3813         rtnl_unlock();
3814
3815         return 0;
3816
3817 out_free_mon:
3818         free_netdev(hwsim_mon);
3819 out_free_radios:
3820         mac80211_hwsim_free();
3821 out_unregister_driver:
3822         platform_driver_unregister(&mac80211_hwsim_driver);
3823 out_unregister_pernet:
3824         unregister_pernet_device(&hwsim_net_ops);
3825 out_free_rht:
3826         rhashtable_destroy(&hwsim_radios_rht);
3827         return err;
3828 }
3829 module_init(init_mac80211_hwsim);
3830
3831 static void __exit exit_mac80211_hwsim(void)
3832 {
3833         pr_debug("mac80211_hwsim: unregister radios\n");
3834
3835         hwsim_exit_netlink();
3836
3837         mac80211_hwsim_free();
3838
3839         rhashtable_destroy(&hwsim_radios_rht);
3840         unregister_netdev(hwsim_mon);
3841         platform_driver_unregister(&mac80211_hwsim_driver);
3842         unregister_pernet_device(&hwsim_net_ops);
3843 }
3844 module_exit(exit_mac80211_hwsim);