drivers/net/wireless/mac80211_hwsim.c

   1 /*
   2  * mac80211_hwsim - software simulator of 802.11 radio(s) for mac80211
   3  * Copyright (c) 2008, Jouni Malinen <j@w1.fi>
   4  * Copyright (c) 2011, Javier Lopez <jlopex@gmail.com>
   5  * Copyright (c) 2016 - 2017 Intel Deutschland GmbH
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 /*
  13  * TODO:
  14  * - Add TSF sync and fix IBSS beacon transmission by adding
  15  *   competition for "air time" at TBTT
  16  * - RX filtering based on filter configuration (data->rx_filter)
  17  */
  18
  19 #include <linux/list.h>
  20 #include <linux/slab.h>
  21 #include <linux/spinlock.h>
  22 #include <net/dst.h>
  23 #include <net/xfrm.h>
  24 #include <net/mac80211.h>
  25 #include <net/ieee80211_radiotap.h>
  26 #include <linux/if_arp.h>
  27 #include <linux/rtnetlink.h>
  28 #include <linux/etherdevice.h>
  29 #include <linux/platform_device.h>
  30 #include <linux/debugfs.h>
  31 #include <linux/module.h>
  32 #include <linux/ktime.h>
  33 #include <net/genetlink.h>
  34 #include <net/net_namespace.h>
  35 #include <net/netns/generic.h>
  36 #include <linux/rhashtable.h>
  37 #include <linux/nospec.h>
  38 #include "mac80211_hwsim.h"
  39
  40 #define WARN_QUEUE 100
  41 #define MAX_QUEUE 200
  42
  43 MODULE_AUTHOR("Jouni Malinen");
  44 MODULE_DESCRIPTION("Software simulator of 802.11 radio(s) for mac80211");
  45 MODULE_LICENSE("GPL");
  46
  47 static int radios = 2;
  48 module_param(radios, int, 0444);
  49 MODULE_PARM_DESC(radios, "Number of simulated radios");
  50
  51 static int channels = 1;
  52 module_param(channels, int, 0444);
  53 MODULE_PARM_DESC(channels, "Number of concurrent channels");
  54
  55 static bool paged_rx = false;
  56 module_param(paged_rx, bool, 0644);
  57 MODULE_PARM_DESC(paged_rx, "Use paged SKBs for RX instead of linear ones");
  58
  59 static bool rctbl = false;
  60 module_param(rctbl, bool, 0444);
  61 MODULE_PARM_DESC(rctbl, "Handle rate control table");
  62
  63 static bool support_p2p_device = true;
  64 module_param(support_p2p_device, bool, 0444);
  65 MODULE_PARM_DESC(support_p2p_device, "Support P2P-Device interface type");
  66
  67 /**
  68  * enum hwsim_regtest - the type of regulatory tests we offer
  69  *
  70  * These are the different values you can use for the regtest
  71  * module parameter. This is useful to help test world roaming
  72  * and the driver regulatory_hint() call and combinations of these.
  73  * If you want to do specific alpha2 regulatory domain tests simply
  74  * use the userspace regulatory request as that will be respected as
  75  * well without the need of this module parameter. This is designed
  76  * only for testing the driver regulatory request, world roaming
  77  * and all possible combinations.
  78  *
  79  * @HWSIM_REGTEST_DISABLED: No regulatory tests are performed,
  80  *      this is the default value.
  81  * @HWSIM_REGTEST_DRIVER_REG_FOLLOW: Used for testing the driver regulatory
  82  *      hint, only one driver regulatory hint will be sent as such the
  83  *      secondary radios are expected to follow.
  84  * @HWSIM_REGTEST_DRIVER_REG_ALL: Used for testing the driver regulatory
  85  *      request with all radios reporting the same regulatory domain.
  86  * @HWSIM_REGTEST_DIFF_COUNTRY: Used for testing the drivers calling
  87  *      different regulatory domains requests. Expected behaviour is for
  88  *      an intersection to occur but each device will still use their
  89  *      respective regulatory requested domains. Subsequent radios will
  90  *      use the resulting intersection.
  91  * @HWSIM_REGTEST_WORLD_ROAM: Used for testing the world roaming. We accomplish
  92  *      this by using a custom beacon-capable regulatory domain for the first
  93  *      radio. All other device world roam.
  94  * @HWSIM_REGTEST_CUSTOM_WORLD: Used for testing the custom world regulatory
  95  *      domain requests. All radios will adhere to this custom world regulatory
  96  *      domain.
  97  * @HWSIM_REGTEST_CUSTOM_WORLD_2: Used for testing 2 custom world regulatory
  98  *      domain requests. The first radio will adhere to the first custom world
  99  *      regulatory domain, the second one to the second custom world regulatory
 100  *      domain. All other devices will world roam.
 101  * @HWSIM_REGTEST_STRICT_FOLLOW_: Used for testing strict regulatory domain
 102  *      settings, only the first radio will send a regulatory domain request
 103  *      and use strict settings. The rest of the radios are expected to follow.
 104  * @HWSIM_REGTEST_STRICT_ALL: Used for testing strict regulatory domain
 105  *      settings. All radios will adhere to this.
 106  * @HWSIM_REGTEST_STRICT_AND_DRIVER_REG: Used for testing strict regulatory
 107  *      domain settings, combined with secondary driver regulatory domain
 108  *      settings. The first radio will get a strict regulatory domain setting
 109  *      using the first driver regulatory request and the second radio will use
 110  *      non-strict settings using the second driver regulatory request. All
 111  *      other devices should follow the intersection created between the
 112  *      first two.
 113  * @HWSIM_REGTEST_ALL: Used for testing every possible mix. You will need
 114  *      at least 6 radios for a complete test. We will test in this order:
 115  *      1 - driver custom world regulatory domain
 116  *      2 - second custom world regulatory domain
 117  *      3 - first driver regulatory domain request
 118  *      4 - second driver regulatory domain request
 119  *      5 - strict regulatory domain settings using the third driver regulatory
 120  *          domain request
 121  *      6 and on - should follow the intersection of the 3rd, 4rth and 5th radio
 122  *                 regulatory requests.
 123  */
 124 enum hwsim_regtest {
 125         HWSIM_REGTEST_DISABLED = 0,
 126         HWSIM_REGTEST_DRIVER_REG_FOLLOW = 1,
 127         HWSIM_REGTEST_DRIVER_REG_ALL = 2,
 128         HWSIM_REGTEST_DIFF_COUNTRY = 3,
 129         HWSIM_REGTEST_WORLD_ROAM = 4,
 130         HWSIM_REGTEST_CUSTOM_WORLD = 5,
 131         HWSIM_REGTEST_CUSTOM_WORLD_2 = 6,
 132         HWSIM_REGTEST_STRICT_FOLLOW = 7,
 133         HWSIM_REGTEST_STRICT_ALL = 8,
 134         HWSIM_REGTEST_STRICT_AND_DRIVER_REG = 9,
 135         HWSIM_REGTEST_ALL = 10,
 136 };
 137
 138 /* Set to one of the HWSIM_REGTEST_* values above */
 139 static int regtest = HWSIM_REGTEST_DISABLED;
 140 module_param(regtest, int, 0444);
 141 MODULE_PARM_DESC(regtest, "The type of regulatory test we want to run");
 142
 143 static const char *hwsim_alpha2s[] = {
 144         "FI",
 145         "AL",
 146         "US",
 147         "DE",
 148         "JP",
 149         "AL",
 150 };
 151
 152 static const struct ieee80211_regdomain hwsim_world_regdom_custom_01 = {
 153         .n_reg_rules = 4,
 154         .alpha2 =  "99",
 155         .reg_rules = {
 156                 REG_RULE(2412-10, 2462+10, 40, 0, 20, 0),
 157                 REG_RULE(2484-10, 2484+10, 40, 0, 20, 0),
 158                 REG_RULE(5150-10, 5240+10, 40, 0, 30, 0),
 159                 REG_RULE(5745-10, 5825+10, 40, 0, 30, 0),
 160         }
 161 };
 162
 163 static const struct ieee80211_regdomain hwsim_world_regdom_custom_02 = {
 164         .n_reg_rules = 2,
 165         .alpha2 =  "99",
 166         .reg_rules = {
 167                 REG_RULE(2412-10, 2462+10, 40, 0, 20, 0),
 168                 REG_RULE(5725-10, 5850+10, 40, 0, 30,
 169                          NL80211_RRF_NO_IR),
 170         }
 171 };
 172
 173 static const struct ieee80211_regdomain *hwsim_world_regdom_custom[] = {
 174         &hwsim_world_regdom_custom_01,
 175         &hwsim_world_regdom_custom_02,
 176 };
 177
 178 struct hwsim_vif_priv {
 179         u32 magic;
 180         u8 bssid[ETH_ALEN];
 181         bool assoc;
 182         bool bcn_en;
 183         u16 aid;
 184 };
 185
 186 #define HWSIM_VIF_MAGIC 0x69537748
 187
 188 static inline void hwsim_check_magic(struct ieee80211_vif *vif)
 189 {
 190         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 191         WARN(vp->magic != HWSIM_VIF_MAGIC,
 192              "Invalid VIF (%p) magic %#x, %pM, %d/%d\n",
 193              vif, vp->magic, vif->addr, vif->type, vif->p2p);
 194 }
 195
 196 static inline void hwsim_set_magic(struct ieee80211_vif *vif)
 197 {
 198         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 199         vp->magic = HWSIM_VIF_MAGIC;
 200 }
 201
 202 static inline void hwsim_clear_magic(struct ieee80211_vif *vif)
 203 {
 204         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 205         vp->magic = 0;
 206 }
 207
 208 struct hwsim_sta_priv {
 209         u32 magic;
 210 };
 211
 212 #define HWSIM_STA_MAGIC 0x6d537749
 213
 214 static inline void hwsim_check_sta_magic(struct ieee80211_sta *sta)
 215 {
 216         struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
 217         WARN_ON(sp->magic != HWSIM_STA_MAGIC);
 218 }
 219
 220 static inline void hwsim_set_sta_magic(struct ieee80211_sta *sta)
 221 {
 222         struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
 223         sp->magic = HWSIM_STA_MAGIC;
 224 }
 225
 226 static inline void hwsim_clear_sta_magic(struct ieee80211_sta *sta)
 227 {
 228         struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
 229         sp->magic = 0;
 230 }
 231
 232 struct hwsim_chanctx_priv {
 233         u32 magic;
 234 };
 235
 236 #define HWSIM_CHANCTX_MAGIC 0x6d53774a
 237
 238 static inline void hwsim_check_chanctx_magic(struct ieee80211_chanctx_conf *c)
 239 {
 240         struct hwsim_chanctx_priv *cp = (void *)c->drv_priv;
 241         WARN_ON(cp->magic != HWSIM_CHANCTX_MAGIC);
 242 }
 243
 244 static inline void hwsim_set_chanctx_magic(struct ieee80211_chanctx_conf *c)
 245 {
 246         struct hwsim_chanctx_priv *cp = (void *)c->drv_priv;
 247         cp->magic = HWSIM_CHANCTX_MAGIC;
 248 }
 249
 250 static inline void hwsim_clear_chanctx_magic(struct ieee80211_chanctx_conf *c)
 251 {
 252         struct hwsim_chanctx_priv *cp = (void *)c->drv_priv;
 253         cp->magic = 0;
 254 }
 255
 256 static unsigned int hwsim_net_id;
 257
 258 static DEFINE_IDA(hwsim_netgroup_ida);
 259
 260 struct hwsim_net {
 261         int netgroup;
 262         u32 wmediumd;
 263 };
 264
 265 static inline int hwsim_net_get_netgroup(struct net *net)
 266 {
 267         struct hwsim_net *hwsim_net = net_generic(net, hwsim_net_id);
 268
 269         return hwsim_net->netgroup;
 270 }
 271
 272 static inline int hwsim_net_set_netgroup(struct net *net)
 273 {
 274         struct hwsim_net *hwsim_net = net_generic(net, hwsim_net_id);
 275
 276         hwsim_net->netgroup = ida_simple_get(&hwsim_netgroup_ida,
 277                                              0, 0, GFP_KERNEL);
 278         return hwsim_net->netgroup >= 0 ? 0 : -ENOMEM;
 279 }
 280
 281 static inline u32 hwsim_net_get_wmediumd(struct net *net)
 282 {
 283         struct hwsim_net *hwsim_net = net_generic(net, hwsim_net_id);
 284
 285         return hwsim_net->wmediumd;
 286 }
 287
 288 static inline void hwsim_net_set_wmediumd(struct net *net, u32 portid)
 289 {
 290         struct hwsim_net *hwsim_net = net_generic(net, hwsim_net_id);
 291
 292         hwsim_net->wmediumd = portid;
 293 }
 294
 295 static struct class *hwsim_class;
 296
 297 static struct net_device *hwsim_mon; /* global monitor netdev */
 298
 299 #define CHAN2G(_freq)  { \
 300         .band = NL80211_BAND_2GHZ, \
 301         .center_freq = (_freq), \
 302         .hw_value = (_freq), \
 303         .max_power = 20, \
 304 }
 305
 306 #define CHAN5G(_freq) { \
 307         .band = NL80211_BAND_5GHZ, \
 308         .center_freq = (_freq), \
 309         .hw_value = (_freq), \
 310         .max_power = 20, \
 311 }
 312
 313 static const struct ieee80211_channel hwsim_channels_2ghz[] = {
 314         CHAN2G(2412), /* Channel 1 */
 315         CHAN2G(2417), /* Channel 2 */
 316         CHAN2G(2422), /* Channel 3 */
 317         CHAN2G(2427), /* Channel 4 */
 318         CHAN2G(2432), /* Channel 5 */
 319         CHAN2G(2437), /* Channel 6 */
 320         CHAN2G(2442), /* Channel 7 */
 321         CHAN2G(2447), /* Channel 8 */
 322         CHAN2G(2452), /* Channel 9 */
 323         CHAN2G(2457), /* Channel 10 */
 324         CHAN2G(2462), /* Channel 11 */
 325         CHAN2G(2467), /* Channel 12 */
 326         CHAN2G(2472), /* Channel 13 */
 327         CHAN2G(2484), /* Channel 14 */
 328 };
 329
 330 static const struct ieee80211_channel hwsim_channels_5ghz[] = {
 331         CHAN5G(5180), /* Channel 36 */
 332         CHAN5G(5200), /* Channel 40 */
 333         CHAN5G(5220), /* Channel 44 */
 334         CHAN5G(5240), /* Channel 48 */
 335
 336         CHAN5G(5260), /* Channel 52 */
 337         CHAN5G(5280), /* Channel 56 */
 338         CHAN5G(5300), /* Channel 60 */
 339         CHAN5G(5320), /* Channel 64 */
 340
 341         CHAN5G(5500), /* Channel 100 */
 342         CHAN5G(5520), /* Channel 104 */
 343         CHAN5G(5540), /* Channel 108 */
 344         CHAN5G(5560), /* Channel 112 */
 345         CHAN5G(5580), /* Channel 116 */
 346         CHAN5G(5600), /* Channel 120 */
 347         CHAN5G(5620), /* Channel 124 */
 348         CHAN5G(5640), /* Channel 128 */
 349         CHAN5G(5660), /* Channel 132 */
 350         CHAN5G(5680), /* Channel 136 */
 351         CHAN5G(5700), /* Channel 140 */
 352
 353         CHAN5G(5745), /* Channel 149 */
 354         CHAN5G(5765), /* Channel 153 */
 355         CHAN5G(5785), /* Channel 157 */
 356         CHAN5G(5805), /* Channel 161 */
 357         CHAN5G(5825), /* Channel 165 */
 358         CHAN5G(5845), /* Channel 169 */
 359 };
 360
 361 static const struct ieee80211_rate hwsim_rates[] = {
 362         { .bitrate = 10 },
 363         { .bitrate = 20, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
 364         { .bitrate = 55, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
 365         { .bitrate = 110, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
 366         { .bitrate = 60 },
 367         { .bitrate = 90 },
 368         { .bitrate = 120 },
 369         { .bitrate = 180 },
 370         { .bitrate = 240 },
 371         { .bitrate = 360 },
 372         { .bitrate = 480 },
 373         { .bitrate = 540 }
 374 };
 375
 376 #define OUI_QCA 0x001374
 377 #define QCA_NL80211_SUBCMD_TEST 1
 378 enum qca_nl80211_vendor_subcmds {
 379         QCA_WLAN_VENDOR_ATTR_TEST = 8,
 380         QCA_WLAN_VENDOR_ATTR_MAX = QCA_WLAN_VENDOR_ATTR_TEST
 381 };
 382
 383 static const struct nla_policy
 384 hwsim_vendor_test_policy[QCA_WLAN_VENDOR_ATTR_MAX + 1] = {
 385         [QCA_WLAN_VENDOR_ATTR_MAX] = { .type = NLA_U32 },
 386 };
 387
 388 static int mac80211_hwsim_vendor_cmd_test(struct wiphy *wiphy,
 389                                           struct wireless_dev *wdev,
 390                                           const void *data, int data_len)
 391 {
 392         struct sk_buff *skb;
 393         struct nlattr *tb[QCA_WLAN_VENDOR_ATTR_MAX + 1];
 394         int err;
 395         u32 val;
 396
 397         err = nla_parse(tb, QCA_WLAN_VENDOR_ATTR_MAX, data, data_len,
 398                         hwsim_vendor_test_policy, NULL);
 399         if (err)
 400                 return err;
 401         if (!tb[QCA_WLAN_VENDOR_ATTR_TEST])
 402                 return -EINVAL;
 403         val = nla_get_u32(tb[QCA_WLAN_VENDOR_ATTR_TEST]);
 404         wiphy_dbg(wiphy, "%s: test=%u\n", __func__, val);
 405
 406         /* Send a vendor event as a test. Note that this would not normally be
 407          * done within a command handler, but rather, based on some other
 408          * trigger. For simplicity, this command is used to trigger the event
 409          * here.
 410          *
 411          * event_idx = 0 (index in mac80211_hwsim_vendor_commands)
 412          */
 413         skb = cfg80211_vendor_event_alloc(wiphy, wdev, 100, 0, GFP_KERNEL);
 414         if (skb) {
 415                 /* skb_put() or nla_put() will fill up data within
 416                  * NL80211_ATTR_VENDOR_DATA.
 417                  */
 418
 419                 /* Add vendor data */
 420                 nla_put_u32(skb, QCA_WLAN_VENDOR_ATTR_TEST, val + 1);
 421
 422                 /* Send the event - this will call nla_nest_end() */
 423                 cfg80211_vendor_event(skb, GFP_KERNEL);
 424         }
 425
 426         /* Send a response to the command */
 427         skb = cfg80211_vendor_cmd_alloc_reply_skb(wiphy, 10);
 428         if (!skb)
 429                 return -ENOMEM;
 430
 431         /* skb_put() or nla_put() will fill up data within
 432          * NL80211_ATTR_VENDOR_DATA
 433          */
 434         nla_put_u32(skb, QCA_WLAN_VENDOR_ATTR_TEST, val + 2);
 435
 436         return cfg80211_vendor_cmd_reply(skb);
 437 }
 438
 439 static struct wiphy_vendor_command mac80211_hwsim_vendor_commands[] = {
 440         {
 441                 .info = { .vendor_id = OUI_QCA,
 442                           .subcmd = QCA_NL80211_SUBCMD_TEST },
 443                 .flags = WIPHY_VENDOR_CMD_NEED_NETDEV,
 444                 .doit = mac80211_hwsim_vendor_cmd_test,
 445         }
 446 };
 447
 448 /* Advertise support vendor specific events */
 449 static const struct nl80211_vendor_cmd_info mac80211_hwsim_vendor_events[] = {
 450         { .vendor_id = OUI_QCA, .subcmd = 1 },
 451 };
 452
 453 static const struct ieee80211_iface_limit hwsim_if_limits[] = {
 454         { .max = 1, .types = BIT(NL80211_IFTYPE_ADHOC) },
 455         { .max = 2048,  .types = BIT(NL80211_IFTYPE_STATION) |
 456                                  BIT(NL80211_IFTYPE_P2P_CLIENT) |
 457 #ifdef CONFIG_MAC80211_MESH
 458                                  BIT(NL80211_IFTYPE_MESH_POINT) |
 459 #endif
 460                                  BIT(NL80211_IFTYPE_AP) |
 461                                  BIT(NL80211_IFTYPE_P2P_GO) },
 462         /* must be last, see hwsim_if_comb */
 463         { .max = 1, .types = BIT(NL80211_IFTYPE_P2P_DEVICE) }
 464 };
 465
 466 static const struct ieee80211_iface_combination hwsim_if_comb[] = {
 467         {
 468                 .limits = hwsim_if_limits,
 469                 /* remove the last entry which is P2P_DEVICE */
 470                 .n_limits = ARRAY_SIZE(hwsim_if_limits) - 1,
 471                 .max_interfaces = 2048,
 472                 .num_different_channels = 1,
 473                 .radar_detect_widths = BIT(NL80211_CHAN_WIDTH_20_NOHT) |
 474                                        BIT(NL80211_CHAN_WIDTH_20) |
 475                                        BIT(NL80211_CHAN_WIDTH_40) |
 476                                        BIT(NL80211_CHAN_WIDTH_80) |
 477                                        BIT(NL80211_CHAN_WIDTH_160),
 478         },
 479 };
 480
 481 static const struct ieee80211_iface_combination hwsim_if_comb_p2p_dev[] = {
 482         {
 483                 .limits = hwsim_if_limits,
 484                 .n_limits = ARRAY_SIZE(hwsim_if_limits),
 485                 .max_interfaces = 2048,
 486                 .num_different_channels = 1,
 487                 .radar_detect_widths = BIT(NL80211_CHAN_WIDTH_20_NOHT) |
 488                                        BIT(NL80211_CHAN_WIDTH_20) |
 489                                        BIT(NL80211_CHAN_WIDTH_40) |
 490                                        BIT(NL80211_CHAN_WIDTH_80) |
 491                                        BIT(NL80211_CHAN_WIDTH_160),
 492         },
 493 };
 494
 495 static spinlock_t hwsim_radio_lock;
 496 static LIST_HEAD(hwsim_radios);
 497 static struct workqueue_struct *hwsim_wq;
 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_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_GRP_ADDR_MULTI_STA_BA_DL_MU |
2538                                 IEEE80211_HE_MAC_CAP3_OMI_CONTROL |
2539                                 IEEE80211_HE_MAC_CAP3_MAX_A_AMPDU_LEN_EXP_VHT_2,
2540                         .mac_cap_info[4] = IEEE80211_HE_MAC_CAP4_AMDSU_IN_AMPDU,
2541                         .phy_cap_info[0] =
2542                                 IEEE80211_HE_PHY_CAP0_DUAL_BAND,
2543                         .phy_cap_info[1] =
2544                                 IEEE80211_HE_PHY_CAP1_PREAMBLE_PUNC_RX_MASK |
2545                                 IEEE80211_HE_PHY_CAP1_DEVICE_CLASS_A |
2546                                 IEEE80211_HE_PHY_CAP1_LDPC_CODING_IN_PAYLOAD |
2547                                 IEEE80211_HE_PHY_CAP1_MIDAMBLE_RX_MAX_NSTS,
2548                         .phy_cap_info[2] =
2549                                 IEEE80211_HE_PHY_CAP2_NDP_4x_LTF_AND_3_2US |
2550                                 IEEE80211_HE_PHY_CAP2_STBC_TX_UNDER_80MHZ |
2551                                 IEEE80211_HE_PHY_CAP2_STBC_RX_UNDER_80MHZ |
2552                                 IEEE80211_HE_PHY_CAP2_UL_MU_FULL_MU_MIMO |
2553                                 IEEE80211_HE_PHY_CAP2_UL_MU_PARTIAL_MU_MIMO,
2554
2555                         /* Leave all the other PHY capability bytes unset, as
2556                          * DCM, beam forming, RU and PPE threshold information
2557                          * are not supported
2558                          */
2559                 },
2560                 .he_mcs_nss_supp = {
2561                         .rx_mcs_80 = cpu_to_le16(0xfffa),
2562                         .tx_mcs_80 = cpu_to_le16(0xfffa),
2563                         .rx_mcs_160 = cpu_to_le16(0xffff),
2564                         .tx_mcs_160 = cpu_to_le16(0xffff),
2565                         .rx_mcs_80p80 = cpu_to_le16(0xffff),
2566                         .tx_mcs_80p80 = cpu_to_le16(0xffff),
2567                 },
2568         },
2569 };
2570
2571 static const struct ieee80211_sband_iftype_data he_capa_5ghz = {
2572         /* TODO: should we support other types, e.g., P2P?*/
2573         .types_mask = BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_AP),
2574         .he_cap = {
2575                 .has_he = true,
2576                 .he_cap_elem = {
2577                         .mac_cap_info[0] =
2578                                 IEEE80211_HE_MAC_CAP0_HTC_HE,
2579                         .mac_cap_info[1] =
2580                                 IEEE80211_HE_MAC_CAP1_TF_MAC_PAD_DUR_16US |
2581                                 IEEE80211_HE_MAC_CAP1_MULTI_TID_AGG_QOS_8,
2582                         .mac_cap_info[2] =
2583                                 IEEE80211_HE_MAC_CAP2_BSR |
2584                                 IEEE80211_HE_MAC_CAP2_MU_CASCADING |
2585                                 IEEE80211_HE_MAC_CAP2_ACK_EN,
2586                         .mac_cap_info[3] =
2587                                 IEEE80211_HE_MAC_CAP3_GRP_ADDR_MULTI_STA_BA_DL_MU |
2588                                 IEEE80211_HE_MAC_CAP3_OMI_CONTROL |
2589                                 IEEE80211_HE_MAC_CAP3_MAX_A_AMPDU_LEN_EXP_VHT_2,
2590                         .mac_cap_info[4] = IEEE80211_HE_MAC_CAP4_AMDSU_IN_AMPDU,
2591                         .phy_cap_info[0] =
2592                                 IEEE80211_HE_PHY_CAP0_DUAL_BAND |
2593                                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G |
2594                                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G |
2595                                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G,
2596                         .phy_cap_info[1] =
2597                                 IEEE80211_HE_PHY_CAP1_PREAMBLE_PUNC_RX_MASK |
2598                                 IEEE80211_HE_PHY_CAP1_DEVICE_CLASS_A |
2599                                 IEEE80211_HE_PHY_CAP1_LDPC_CODING_IN_PAYLOAD |
2600                                 IEEE80211_HE_PHY_CAP1_MIDAMBLE_RX_MAX_NSTS,
2601                         .phy_cap_info[2] =
2602                                 IEEE80211_HE_PHY_CAP2_NDP_4x_LTF_AND_3_2US |
2603                                 IEEE80211_HE_PHY_CAP2_STBC_TX_UNDER_80MHZ |
2604                                 IEEE80211_HE_PHY_CAP2_STBC_RX_UNDER_80MHZ |
2605                                 IEEE80211_HE_PHY_CAP2_UL_MU_FULL_MU_MIMO |
2606                                 IEEE80211_HE_PHY_CAP2_UL_MU_PARTIAL_MU_MIMO,
2607
2608                         /* Leave all the other PHY capability bytes unset, as
2609                          * DCM, beam forming, RU and PPE threshold information
2610                          * are not supported
2611                          */
2612                 },
2613                 .he_mcs_nss_supp = {
2614                         .rx_mcs_80 = cpu_to_le16(0xfffa),
2615                         .tx_mcs_80 = cpu_to_le16(0xfffa),
2616                         .rx_mcs_160 = cpu_to_le16(0xfffa),
2617                         .tx_mcs_160 = cpu_to_le16(0xfffa),
2618                         .rx_mcs_80p80 = cpu_to_le16(0xfffa),
2619                         .tx_mcs_80p80 = cpu_to_le16(0xfffa),
2620                 },
2621         },
2622 };
2623
2624 static void mac80211_hswim_he_capab(struct ieee80211_supported_band *sband)
2625 {
2626         if (sband->band == NL80211_BAND_2GHZ)
2627                 sband->iftype_data =
2628                         (struct ieee80211_sband_iftype_data *)&he_capa_2ghz;
2629         else if (sband->band == NL80211_BAND_5GHZ)
2630                 sband->iftype_data =
2631                         (struct ieee80211_sband_iftype_data *)&he_capa_5ghz;
2632         else
2633                 return;
2634
2635         sband->n_iftype_data = 1;
2636 }
2637
2638 static int mac80211_hwsim_new_radio(struct genl_info *info,
2639                                     struct hwsim_new_radio_params *param)
2640 {
2641         int err;
2642         u8 addr[ETH_ALEN];
2643         struct mac80211_hwsim_data *data;
2644         struct ieee80211_hw *hw;
2645         enum nl80211_band band;
2646         const struct ieee80211_ops *ops = &mac80211_hwsim_ops;
2647         struct net *net;
2648         int idx;
2649
2650         if (WARN_ON(param->channels > 1 && !param->use_chanctx))
2651                 return -EINVAL;
2652
2653         spin_lock_bh(&hwsim_radio_lock);
2654         idx = hwsim_radio_idx++;
2655         spin_unlock_bh(&hwsim_radio_lock);
2656
2657         if (param->use_chanctx)
2658                 ops = &mac80211_hwsim_mchan_ops;
2659         hw = ieee80211_alloc_hw_nm(sizeof(*data), ops, param->hwname);
2660         if (!hw) {
2661                 pr_debug("mac80211_hwsim: ieee80211_alloc_hw failed\n");
2662                 err = -ENOMEM;
2663                 goto failed;
2664         }
2665
2666         /* ieee80211_alloc_hw_nm may have used a default name */
2667         param->hwname = wiphy_name(hw->wiphy);
2668
2669         if (info)
2670                 net = genl_info_net(info);
2671         else
2672                 net = &init_net;
2673         wiphy_net_set(hw->wiphy, net);
2674
2675         data = hw->priv;
2676         data->hw = hw;
2677
2678         data->dev = device_create(hwsim_class, NULL, 0, hw, "hwsim%d", idx);
2679         if (IS_ERR(data->dev)) {
2680                 printk(KERN_DEBUG
2681                        "mac80211_hwsim: device_create failed (%ld)\n",
2682                        PTR_ERR(data->dev));
2683                 err = -ENOMEM;
2684                 goto failed_drvdata;
2685         }
2686         data->dev->driver = &mac80211_hwsim_driver.driver;
2687         err = device_bind_driver(data->dev);
2688         if (err != 0) {
2689                 pr_debug("mac80211_hwsim: device_bind_driver failed (%d)\n",
2690                        err);
2691                 goto failed_bind;
2692         }
2693
2694         skb_queue_head_init(&data->pending);
2695
2696         SET_IEEE80211_DEV(hw, data->dev);
2697         if (!param->perm_addr) {
2698                 eth_zero_addr(addr);
2699                 addr[0] = 0x02;
2700                 addr[3] = idx >> 8;
2701                 addr[4] = idx;
2702                 memcpy(data->addresses[0].addr, addr, ETH_ALEN);
2703                 /* Why need here second address ? */
2704                 memcpy(data->addresses[1].addr, addr, ETH_ALEN);
2705                 data->addresses[1].addr[0] |= 0x40;
2706                 hw->wiphy->n_addresses = 2;
2707                 hw->wiphy->addresses = data->addresses;
2708                 /* possible address clash is checked at hash table insertion */
2709         } else {
2710                 memcpy(data->addresses[0].addr, param->perm_addr, ETH_ALEN);
2711                 /* compatibility with automatically generated mac addr */
2712                 memcpy(data->addresses[1].addr, param->perm_addr, ETH_ALEN);
2713                 hw->wiphy->n_addresses = 2;
2714                 hw->wiphy->addresses = data->addresses;
2715         }
2716
2717         data->channels = param->channels;
2718         data->use_chanctx = param->use_chanctx;
2719         data->idx = idx;
2720         data->destroy_on_close = param->destroy_on_close;
2721         if (info)
2722                 data->portid = info->snd_portid;
2723
2724         if (data->use_chanctx) {
2725                 hw->wiphy->max_scan_ssids = 255;
2726                 hw->wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
2727                 hw->wiphy->max_remain_on_channel_duration = 1000;
2728                 hw->wiphy->iface_combinations = &data->if_combination;
2729                 if (param->p2p_device)
2730                         data->if_combination = hwsim_if_comb_p2p_dev[0];
2731                 else
2732                         data->if_combination = hwsim_if_comb[0];
2733                 hw->wiphy->n_iface_combinations = 1;
2734                 /* For channels > 1 DFS is not allowed */
2735                 data->if_combination.radar_detect_widths = 0;
2736                 data->if_combination.num_different_channels = data->channels;
2737         } else if (param->p2p_device) {
2738                 hw->wiphy->iface_combinations = hwsim_if_comb_p2p_dev;
2739                 hw->wiphy->n_iface_combinations =
2740                         ARRAY_SIZE(hwsim_if_comb_p2p_dev);
2741         } else {
2742                 hw->wiphy->iface_combinations = hwsim_if_comb;
2743                 hw->wiphy->n_iface_combinations = ARRAY_SIZE(hwsim_if_comb);
2744         }
2745
2746         INIT_DELAYED_WORK(&data->roc_start, hw_roc_start);
2747         INIT_DELAYED_WORK(&data->roc_done, hw_roc_done);
2748         INIT_DELAYED_WORK(&data->hw_scan, hw_scan_work);
2749
2750         hw->queues = 5;
2751         hw->offchannel_tx_hw_queue = 4;
2752         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
2753                                      BIT(NL80211_IFTYPE_AP) |
2754                                      BIT(NL80211_IFTYPE_P2P_CLIENT) |
2755                                      BIT(NL80211_IFTYPE_P2P_GO) |
2756                                      BIT(NL80211_IFTYPE_ADHOC) |
2757                                      BIT(NL80211_IFTYPE_MESH_POINT);
2758
2759         if (param->p2p_device)
2760                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_P2P_DEVICE);
2761
2762         ieee80211_hw_set(hw, SUPPORT_FAST_XMIT);
2763         ieee80211_hw_set(hw, CHANCTX_STA_CSA);
2764         ieee80211_hw_set(hw, SUPPORTS_HT_CCK_RATES);
2765         ieee80211_hw_set(hw, QUEUE_CONTROL);
2766         ieee80211_hw_set(hw, WANT_MONITOR_VIF);
2767         ieee80211_hw_set(hw, AMPDU_AGGREGATION);
2768         ieee80211_hw_set(hw, MFP_CAPABLE);
2769         ieee80211_hw_set(hw, SIGNAL_DBM);
2770         ieee80211_hw_set(hw, SUPPORTS_PS);
2771         ieee80211_hw_set(hw, TDLS_WIDER_BW);
2772         if (rctbl)
2773                 ieee80211_hw_set(hw, SUPPORTS_RC_TABLE);
2774
2775         hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS |
2776                             WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL |
2777                             WIPHY_FLAG_AP_UAPSD |
2778                             WIPHY_FLAG_HAS_CHANNEL_SWITCH;
2779         hw->wiphy->features |= NL80211_FEATURE_ACTIVE_MONITOR |
2780                                NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE |
2781                                NL80211_FEATURE_STATIC_SMPS |
2782                                NL80211_FEATURE_DYNAMIC_SMPS |
2783                                NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR;
2784         wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_VHT_IBSS);
2785
2786         /* ask mac80211 to reserve space for magic */
2787         hw->vif_data_size = sizeof(struct hwsim_vif_priv);
2788         hw->sta_data_size = sizeof(struct hwsim_sta_priv);
2789         hw->chanctx_data_size = sizeof(struct hwsim_chanctx_priv);
2790
2791         memcpy(data->channels_2ghz, hwsim_channels_2ghz,
2792                 sizeof(hwsim_channels_2ghz));
2793         memcpy(data->channels_5ghz, hwsim_channels_5ghz,
2794                 sizeof(hwsim_channels_5ghz));
2795         memcpy(data->rates, hwsim_rates, sizeof(hwsim_rates));
2796
2797         for (band = NL80211_BAND_2GHZ; band < NUM_NL80211_BANDS; band++) {
2798                 struct ieee80211_supported_band *sband = &data->bands[band];
2799
2800                 sband->band = band;
2801
2802                 switch (band) {
2803                 case NL80211_BAND_2GHZ:
2804                         sband->channels = data->channels_2ghz;
2805                         sband->n_channels = ARRAY_SIZE(hwsim_channels_2ghz);
2806                         sband->bitrates = data->rates;
2807                         sband->n_bitrates = ARRAY_SIZE(hwsim_rates);
2808                         break;
2809                 case NL80211_BAND_5GHZ:
2810                         sband->channels = data->channels_5ghz;
2811                         sband->n_channels = ARRAY_SIZE(hwsim_channels_5ghz);
2812                         sband->bitrates = data->rates + 4;
2813                         sband->n_bitrates = ARRAY_SIZE(hwsim_rates) - 4;
2814
2815                         sband->vht_cap.vht_supported = true;
2816                         sband->vht_cap.cap =
2817                                 IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454 |
2818                                 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ |
2819                                 IEEE80211_VHT_CAP_RXLDPC |
2820                                 IEEE80211_VHT_CAP_SHORT_GI_80 |
2821                                 IEEE80211_VHT_CAP_SHORT_GI_160 |
2822                                 IEEE80211_VHT_CAP_TXSTBC |
2823                                 IEEE80211_VHT_CAP_RXSTBC_4 |
2824                                 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
2825                         sband->vht_cap.vht_mcs.rx_mcs_map =
2826                                 cpu_to_le16(IEEE80211_VHT_MCS_SUPPORT_0_9 << 0 |
2827                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 2 |
2828                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 4 |
2829                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 6 |
2830                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 8 |
2831                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 10 |
2832                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 12 |
2833                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 14);
2834                         sband->vht_cap.vht_mcs.tx_mcs_map =
2835                                 sband->vht_cap.vht_mcs.rx_mcs_map;
2836                         break;
2837                 default:
2838                         continue;
2839                 }
2840
2841                 sband->ht_cap.ht_supported = true;
2842                 sband->ht_cap.cap = IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
2843                                     IEEE80211_HT_CAP_GRN_FLD |
2844                                     IEEE80211_HT_CAP_SGI_20 |
2845                                     IEEE80211_HT_CAP_SGI_40 |
2846                                     IEEE80211_HT_CAP_DSSSCCK40;
2847                 sband->ht_cap.ampdu_factor = 0x3;
2848                 sband->ht_cap.ampdu_density = 0x6;
2849                 memset(&sband->ht_cap.mcs, 0,
2850                        sizeof(sband->ht_cap.mcs));
2851                 sband->ht_cap.mcs.rx_mask[0] = 0xff;
2852                 sband->ht_cap.mcs.rx_mask[1] = 0xff;
2853                 sband->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
2854
2855                 mac80211_hswim_he_capab(sband);
2856
2857                 hw->wiphy->bands[band] = sband;
2858         }
2859
2860         /* By default all radios belong to the first group */
2861         data->group = 1;
2862         mutex_init(&data->mutex);
2863
2864         data->netgroup = hwsim_net_get_netgroup(net);
2865         data->wmediumd = hwsim_net_get_wmediumd(net);
2866
2867         /* Enable frame retransmissions for lossy channels */
2868         hw->max_rates = 4;
2869         hw->max_rate_tries = 11;
2870
2871         hw->wiphy->vendor_commands = mac80211_hwsim_vendor_commands;
2872         hw->wiphy->n_vendor_commands =
2873                 ARRAY_SIZE(mac80211_hwsim_vendor_commands);
2874         hw->wiphy->vendor_events = mac80211_hwsim_vendor_events;
2875         hw->wiphy->n_vendor_events = ARRAY_SIZE(mac80211_hwsim_vendor_events);
2876
2877         if (param->reg_strict)
2878                 hw->wiphy->regulatory_flags |= REGULATORY_STRICT_REG;
2879         if (param->regd) {
2880                 data->regd = param->regd;
2881                 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG;
2882                 wiphy_apply_custom_regulatory(hw->wiphy, param->regd);
2883                 /* give the regulatory workqueue a chance to run */
2884                 schedule_timeout_interruptible(1);
2885         }
2886
2887         if (param->no_vif)
2888                 ieee80211_hw_set(hw, NO_AUTO_VIF);
2889
2890         wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
2891
2892         tasklet_hrtimer_init(&data->beacon_timer,
2893                              mac80211_hwsim_beacon,
2894                              CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2895
2896         err = ieee80211_register_hw(hw);
2897         if (err < 0) {
2898                 pr_debug("mac80211_hwsim: ieee80211_register_hw failed (%d)\n",
2899                        err);
2900                 goto failed_hw;
2901         }
2902
2903         wiphy_dbg(hw->wiphy, "hwaddr %pM registered\n", hw->wiphy->perm_addr);
2904
2905         if (param->reg_alpha2) {
2906                 data->alpha2[0] = param->reg_alpha2[0];
2907                 data->alpha2[1] = param->reg_alpha2[1];
2908                 regulatory_hint(hw->wiphy, param->reg_alpha2);
2909         }
2910
2911         data->debugfs = debugfs_create_dir("hwsim", hw->wiphy->debugfsdir);
2912         debugfs_create_file("ps", 0666, data->debugfs, data, &hwsim_fops_ps);
2913         debugfs_create_file("group", 0666, data->debugfs, data,
2914                             &hwsim_fops_group);
2915         if (!data->use_chanctx)
2916                 debugfs_create_file("dfs_simulate_radar", 0222,
2917                                     data->debugfs,
2918                                     data, &hwsim_simulate_radar);
2919
2920         spin_lock_bh(&hwsim_radio_lock);
2921         err = rhashtable_insert_fast(&hwsim_radios_rht, &data->rht,
2922                                      hwsim_rht_params);
2923         if (err < 0) {
2924                 if (info) {
2925                         GENL_SET_ERR_MSG(info, "perm addr already present");
2926                         NL_SET_BAD_ATTR(info->extack,
2927                                         info->attrs[HWSIM_ATTR_PERM_ADDR]);
2928                 }
2929                 spin_unlock_bh(&hwsim_radio_lock);
2930                 goto failed_final_insert;
2931         }
2932
2933         list_add_tail(&data->list, &hwsim_radios);
2934         hwsim_radios_generation++;
2935         spin_unlock_bh(&hwsim_radio_lock);
2936
2937         hwsim_mcast_new_radio(idx, info, param);
2938
2939         return idx;
2940
2941 failed_final_insert:
2942         debugfs_remove_recursive(data->debugfs);
2943         ieee80211_unregister_hw(data->hw);
2944 failed_hw:
2945         device_release_driver(data->dev);
2946 failed_bind:
2947         device_unregister(data->dev);
2948 failed_drvdata:
2949         ieee80211_free_hw(hw);
2950 failed:
2951         return err;
2952 }
2953
2954 static void hwsim_mcast_del_radio(int id, const char *hwname,
2955                                   struct genl_info *info)
2956 {
2957         struct sk_buff *skb;
2958         void *data;
2959         int ret;
2960
2961         skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2962         if (!skb)
2963                 return;
2964
2965         data = genlmsg_put(skb, 0, 0, &hwsim_genl_family, 0,
2966                            HWSIM_CMD_DEL_RADIO);
2967         if (!data)
2968                 goto error;
2969
2970         ret = nla_put_u32(skb, HWSIM_ATTR_RADIO_ID, id);
2971         if (ret < 0)
2972                 goto error;
2973
2974         ret = nla_put(skb, HWSIM_ATTR_RADIO_NAME, strlen(hwname),
2975                       hwname);
2976         if (ret < 0)
2977                 goto error;
2978
2979         genlmsg_end(skb, data);
2980
2981         hwsim_mcast_config_msg(skb, info);
2982
2983         return;
2984
2985 error:
2986         nlmsg_free(skb);
2987 }
2988
2989 static void mac80211_hwsim_del_radio(struct mac80211_hwsim_data *data,
2990                                      const char *hwname,
2991                                      struct genl_info *info)
2992 {
2993         hwsim_mcast_del_radio(data->idx, hwname, info);
2994         debugfs_remove_recursive(data->debugfs);
2995         ieee80211_unregister_hw(data->hw);
2996         device_release_driver(data->dev);
2997         device_unregister(data->dev);
2998         ieee80211_free_hw(data->hw);
2999 }
3000
3001 static int mac80211_hwsim_get_radio(struct sk_buff *skb,
3002                                     struct mac80211_hwsim_data *data,
3003                                     u32 portid, u32 seq,
3004                                     struct netlink_callback *cb, int flags)
3005 {
3006         void *hdr;
3007         struct hwsim_new_radio_params param = { };
3008         int res = -EMSGSIZE;
3009
3010         hdr = genlmsg_put(skb, portid, seq, &hwsim_genl_family, flags,
3011                           HWSIM_CMD_GET_RADIO);
3012         if (!hdr)
3013                 return -EMSGSIZE;
3014
3015         if (cb)
3016                 genl_dump_check_consistent(cb, hdr);
3017
3018         if (data->alpha2[0] && data->alpha2[1])
3019                 param.reg_alpha2 = data->alpha2;
3020
3021         param.reg_strict = !!(data->hw->wiphy->regulatory_flags &
3022                                         REGULATORY_STRICT_REG);
3023         param.p2p_device = !!(data->hw->wiphy->interface_modes &
3024                                         BIT(NL80211_IFTYPE_P2P_DEVICE));
3025         param.use_chanctx = data->use_chanctx;
3026         param.regd = data->regd;
3027         param.channels = data->channels;
3028         param.hwname = wiphy_name(data->hw->wiphy);
3029
3030         res = append_radio_msg(skb, data->idx, &param);
3031         if (res < 0)
3032                 goto out_err;
3033
3034         genlmsg_end(skb, hdr);
3035         return 0;
3036
3037 out_err:
3038         genlmsg_cancel(skb, hdr);
3039         return res;
3040 }
3041
3042 static void mac80211_hwsim_free(void)
3043 {
3044         struct mac80211_hwsim_data *data;
3045
3046         spin_lock_bh(&hwsim_radio_lock);
3047         while ((data = list_first_entry_or_null(&hwsim_radios,
3048                                                 struct mac80211_hwsim_data,
3049                                                 list))) {
3050                 list_del(&data->list);
3051                 spin_unlock_bh(&hwsim_radio_lock);
3052                 mac80211_hwsim_del_radio(data, wiphy_name(data->hw->wiphy),
3053                                          NULL);
3054                 spin_lock_bh(&hwsim_radio_lock);
3055         }
3056         spin_unlock_bh(&hwsim_radio_lock);
3057         class_destroy(hwsim_class);
3058 }
3059
3060 static const struct net_device_ops hwsim_netdev_ops = {
3061         .ndo_start_xmit         = hwsim_mon_xmit,
3062         .ndo_set_mac_address    = eth_mac_addr,
3063         .ndo_validate_addr      = eth_validate_addr,
3064 };
3065
3066 static void hwsim_mon_setup(struct net_device *dev)
3067 {
3068         dev->netdev_ops = &hwsim_netdev_ops;
3069         dev->needs_free_netdev = true;
3070         ether_setup(dev);
3071         dev->priv_flags |= IFF_NO_QUEUE;
3072         dev->type = ARPHRD_IEEE80211_RADIOTAP;
3073         eth_zero_addr(dev->dev_addr);
3074         dev->dev_addr[0] = 0x12;
3075 }
3076
3077 static struct mac80211_hwsim_data *get_hwsim_data_ref_from_addr(const u8 *addr)
3078 {
3079         return rhashtable_lookup_fast(&hwsim_radios_rht,
3080                                       addr,
3081                                       hwsim_rht_params);
3082 }
3083
3084 static void hwsim_register_wmediumd(struct net *net, u32 portid)
3085 {
3086         struct mac80211_hwsim_data *data;
3087
3088         hwsim_net_set_wmediumd(net, portid);
3089
3090         spin_lock_bh(&hwsim_radio_lock);
3091         list_for_each_entry(data, &hwsim_radios, list) {
3092                 if (data->netgroup == hwsim_net_get_netgroup(net))
3093                         data->wmediumd = portid;
3094         }
3095         spin_unlock_bh(&hwsim_radio_lock);
3096 }
3097
3098 static int hwsim_tx_info_frame_received_nl(struct sk_buff *skb_2,
3099                                            struct genl_info *info)
3100 {
3101
3102         struct ieee80211_hdr *hdr;
3103         struct mac80211_hwsim_data *data2;
3104         struct ieee80211_tx_info *txi;
3105         struct hwsim_tx_rate *tx_attempts;
3106         u64 ret_skb_cookie;
3107         struct sk_buff *skb, *tmp;
3108         const u8 *src;
3109         unsigned int hwsim_flags;
3110         int i;
3111         bool found = false;
3112
3113         if (!info->attrs[HWSIM_ATTR_ADDR_TRANSMITTER] ||
3114             !info->attrs[HWSIM_ATTR_FLAGS] ||
3115             !info->attrs[HWSIM_ATTR_COOKIE] ||
3116             !info->attrs[HWSIM_ATTR_SIGNAL] ||
3117             !info->attrs[HWSIM_ATTR_TX_INFO])
3118                 goto out;
3119
3120         src = (void *)nla_data(info->attrs[HWSIM_ATTR_ADDR_TRANSMITTER]);
3121         hwsim_flags = nla_get_u32(info->attrs[HWSIM_ATTR_FLAGS]);
3122         ret_skb_cookie = nla_get_u64(info->attrs[HWSIM_ATTR_COOKIE]);
3123
3124         data2 = get_hwsim_data_ref_from_addr(src);
3125         if (!data2)
3126                 goto out;
3127
3128         if (hwsim_net_get_netgroup(genl_info_net(info)) != data2->netgroup)
3129                 goto out;
3130
3131         if (info->snd_portid != data2->wmediumd)
3132                 goto out;
3133
3134         /* look for the skb matching the cookie passed back from user */
3135         skb_queue_walk_safe(&data2->pending, skb, tmp) {
3136                 u64 skb_cookie;
3137
3138                 txi = IEEE80211_SKB_CB(skb);
3139                 skb_cookie = (u64)(uintptr_t)txi->rate_driver_data[0];
3140
3141                 if (skb_cookie == ret_skb_cookie) {
3142                         skb_unlink(skb, &data2->pending);
3143                         found = true;
3144                         break;
3145                 }
3146         }
3147
3148         /* not found */
3149         if (!found)
3150                 goto out;
3151
3152         /* Tx info received because the frame was broadcasted on user space,
3153          so we get all the necessary info: tx attempts and skb control buff */
3154
3155         tx_attempts = (struct hwsim_tx_rate *)nla_data(
3156                        info->attrs[HWSIM_ATTR_TX_INFO]);
3157
3158         /* now send back TX status */
3159         txi = IEEE80211_SKB_CB(skb);
3160
3161         ieee80211_tx_info_clear_status(txi);
3162
3163         for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
3164                 txi->status.rates[i].idx = tx_attempts[i].idx;
3165                 txi->status.rates[i].count = tx_attempts[i].count;
3166         }
3167
3168         txi->status.ack_signal = nla_get_u32(info->attrs[HWSIM_ATTR_SIGNAL]);
3169
3170         if (!(hwsim_flags & HWSIM_TX_CTL_NO_ACK) &&
3171            (hwsim_flags & HWSIM_TX_STAT_ACK)) {
3172                 if (skb->len >= 16) {
3173                         hdr = (struct ieee80211_hdr *) skb->data;
3174                         mac80211_hwsim_monitor_ack(data2->channel,
3175                                                    hdr->addr2);
3176                 }
3177                 txi->flags |= IEEE80211_TX_STAT_ACK;
3178         }
3179         ieee80211_tx_status_irqsafe(data2->hw, skb);
3180         return 0;
3181 out:
3182         return -EINVAL;
3183
3184 }
3185
3186 static int hwsim_cloned_frame_received_nl(struct sk_buff *skb_2,
3187                                           struct genl_info *info)
3188 {
3189         struct mac80211_hwsim_data *data2;
3190         struct ieee80211_rx_status rx_status;
3191         const u8 *dst;
3192         int frame_data_len;
3193         void *frame_data;
3194         struct sk_buff *skb = NULL;
3195
3196         if (!info->attrs[HWSIM_ATTR_ADDR_RECEIVER] ||
3197             !info->attrs[HWSIM_ATTR_FRAME] ||
3198             !info->attrs[HWSIM_ATTR_RX_RATE] ||
3199             !info->attrs[HWSIM_ATTR_SIGNAL])
3200                 goto out;
3201
3202         dst = (void *)nla_data(info->attrs[HWSIM_ATTR_ADDR_RECEIVER]);
3203         frame_data_len = nla_len(info->attrs[HWSIM_ATTR_FRAME]);
3204         frame_data = (void *)nla_data(info->attrs[HWSIM_ATTR_FRAME]);
3205
3206         /* Allocate new skb here */
3207         skb = alloc_skb(frame_data_len, GFP_KERNEL);
3208         if (skb == NULL)
3209                 goto err;
3210
3211         if (frame_data_len > IEEE80211_MAX_DATA_LEN)
3212                 goto err;
3213
3214         /* Copy the data */
3215         skb_put_data(skb, frame_data, frame_data_len);
3216
3217         data2 = get_hwsim_data_ref_from_addr(dst);
3218         if (!data2)
3219                 goto out;
3220
3221         if (hwsim_net_get_netgroup(genl_info_net(info)) != data2->netgroup)
3222                 goto out;
3223
3224         if (info->snd_portid != data2->wmediumd)
3225                 goto out;
3226
3227         /* check if radio is configured properly */
3228
3229         if (data2->idle || !data2->started)
3230                 goto out;
3231
3232         /* A frame is received from user space */
3233         memset(&rx_status, 0, sizeof(rx_status));
3234         if (info->attrs[HWSIM_ATTR_FREQ]) {
3235                 /* throw away off-channel packets, but allow both the temporary
3236                  * ("hw" scan/remain-on-channel) and regular channel, since the
3237                  * internal datapath also allows this
3238                  */
3239                 mutex_lock(&data2->mutex);
3240                 rx_status.freq = nla_get_u32(info->attrs[HWSIM_ATTR_FREQ]);
3241
3242                 if (rx_status.freq != data2->channel->center_freq &&
3243                     (!data2->tmp_chan ||
3244                      rx_status.freq != data2->tmp_chan->center_freq)) {
3245                         mutex_unlock(&data2->mutex);
3246                         goto out;
3247                 }
3248                 mutex_unlock(&data2->mutex);
3249         } else {
3250                 rx_status.freq = data2->channel->center_freq;
3251         }
3252
3253         rx_status.band = data2->channel->band;
3254         rx_status.rate_idx = nla_get_u32(info->attrs[HWSIM_ATTR_RX_RATE]);
3255         rx_status.signal = nla_get_u32(info->attrs[HWSIM_ATTR_SIGNAL]);
3256
3257         memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
3258         data2->rx_pkts++;
3259         data2->rx_bytes += skb->len;
3260         ieee80211_rx_irqsafe(data2->hw, skb);
3261
3262         return 0;
3263 err:
3264         pr_debug("mac80211_hwsim: error occurred in %s\n", __func__);
3265 out:
3266         dev_kfree_skb(skb);
3267         return -EINVAL;
3268 }
3269
3270 static int hwsim_register_received_nl(struct sk_buff *skb_2,
3271                                       struct genl_info *info)
3272 {
3273         struct net *net = genl_info_net(info);
3274         struct mac80211_hwsim_data *data;
3275         int chans = 1;
3276
3277         spin_lock_bh(&hwsim_radio_lock);
3278         list_for_each_entry(data, &hwsim_radios, list)
3279                 chans = max(chans, data->channels);
3280         spin_unlock_bh(&hwsim_radio_lock);
3281
3282         /* In the future we should revise the userspace API and allow it
3283          * to set a flag that it does support multi-channel, then we can
3284          * let this pass conditionally on the flag.
3285          * For current userspace, prohibit it since it won't work right.
3286          */
3287         if (chans > 1)
3288                 return -EOPNOTSUPP;
3289
3290         if (hwsim_net_get_wmediumd(net))
3291                 return -EBUSY;
3292
3293         hwsim_register_wmediumd(net, info->snd_portid);
3294
3295         pr_debug("mac80211_hwsim: received a REGISTER, "
3296                "switching to wmediumd mode with pid %d\n", info->snd_portid);
3297
3298         return 0;
3299 }
3300
3301 static int hwsim_new_radio_nl(struct sk_buff *msg, struct genl_info *info)
3302 {
3303         struct hwsim_new_radio_params param = { 0 };
3304         const char *hwname = NULL;
3305         int ret;
3306
3307         param.reg_strict = info->attrs[HWSIM_ATTR_REG_STRICT_REG];
3308         param.p2p_device = info->attrs[HWSIM_ATTR_SUPPORT_P2P_DEVICE];
3309         param.channels = channels;
3310         param.destroy_on_close =
3311                 info->attrs[HWSIM_ATTR_DESTROY_RADIO_ON_CLOSE];
3312
3313         if (info->attrs[HWSIM_ATTR_CHANNELS])
3314                 param.channels = nla_get_u32(info->attrs[HWSIM_ATTR_CHANNELS]);
3315
3316         if (param.channels < 1) {
3317                 GENL_SET_ERR_MSG(info, "must have at least one channel");
3318                 return -EINVAL;
3319         }
3320
3321         if (param.channels > CFG80211_MAX_NUM_DIFFERENT_CHANNELS) {
3322                 GENL_SET_ERR_MSG(info, "too many channels specified");
3323                 return -EINVAL;
3324         }
3325
3326         if (info->attrs[HWSIM_ATTR_NO_VIF])
3327                 param.no_vif = true;
3328
3329         if (info->attrs[HWSIM_ATTR_RADIO_NAME]) {
3330                 hwname = kstrndup((char *)nla_data(info->attrs[HWSIM_ATTR_RADIO_NAME]),
3331                                   nla_len(info->attrs[HWSIM_ATTR_RADIO_NAME]),
3332                                   GFP_KERNEL);
3333                 if (!hwname)
3334                         return -ENOMEM;
3335                 param.hwname = hwname;
3336         }
3337
3338         if (info->attrs[HWSIM_ATTR_USE_CHANCTX])
3339                 param.use_chanctx = true;
3340         else
3341                 param.use_chanctx = (param.channels > 1);
3342
3343         if (info->attrs[HWSIM_ATTR_REG_HINT_ALPHA2])
3344                 param.reg_alpha2 =
3345                         nla_data(info->attrs[HWSIM_ATTR_REG_HINT_ALPHA2]);
3346
3347         if (info->attrs[HWSIM_ATTR_REG_CUSTOM_REG]) {
3348                 u32 idx = nla_get_u32(info->attrs[HWSIM_ATTR_REG_CUSTOM_REG]);
3349
3350                 if (idx >= ARRAY_SIZE(hwsim_world_regdom_custom)) {
3351                         kfree(hwname);
3352                         return -EINVAL;
3353                 }
3354
3355                 idx = array_index_nospec(idx,
3356                                          ARRAY_SIZE(hwsim_world_regdom_custom));
3357                 param.regd = hwsim_world_regdom_custom[idx];
3358         }
3359
3360         if (info->attrs[HWSIM_ATTR_PERM_ADDR]) {
3361                 if (!is_valid_ether_addr(
3362                                 nla_data(info->attrs[HWSIM_ATTR_PERM_ADDR]))) {
3363                         GENL_SET_ERR_MSG(info,"MAC is no valid source addr");
3364                         NL_SET_BAD_ATTR(info->extack,
3365                                         info->attrs[HWSIM_ATTR_PERM_ADDR]);
3366                         kfree(hwname);
3367                         return -EINVAL;
3368                 }
3369
3370
3371                 param.perm_addr = nla_data(info->attrs[HWSIM_ATTR_PERM_ADDR]);
3372         }
3373
3374         ret = mac80211_hwsim_new_radio(info, &param);
3375         kfree(hwname);
3376         return ret;
3377 }
3378
3379 static int hwsim_del_radio_nl(struct sk_buff *msg, struct genl_info *info)
3380 {
3381         struct mac80211_hwsim_data *data;
3382         s64 idx = -1;
3383         const char *hwname = NULL;
3384
3385         if (info->attrs[HWSIM_ATTR_RADIO_ID]) {
3386                 idx = nla_get_u32(info->attrs[HWSIM_ATTR_RADIO_ID]);
3387         } else if (info->attrs[HWSIM_ATTR_RADIO_NAME]) {
3388                 hwname = kstrndup((char *)nla_data(info->attrs[HWSIM_ATTR_RADIO_NAME]),
3389                                   nla_len(info->attrs[HWSIM_ATTR_RADIO_NAME]),
3390                                   GFP_KERNEL);
3391                 if (!hwname)
3392                         return -ENOMEM;
3393         } else
3394                 return -EINVAL;
3395
3396         spin_lock_bh(&hwsim_radio_lock);
3397         list_for_each_entry(data, &hwsim_radios, list) {
3398                 if (idx >= 0) {
3399                         if (data->idx != idx)
3400                                 continue;
3401                 } else {
3402                         if (!hwname ||
3403                             strcmp(hwname, wiphy_name(data->hw->wiphy)))
3404                                 continue;
3405                 }
3406
3407                 if (!net_eq(wiphy_net(data->hw->wiphy), genl_info_net(info)))
3408                         continue;
3409
3410                 list_del(&data->list);
3411                 rhashtable_remove_fast(&hwsim_radios_rht, &data->rht,
3412                                        hwsim_rht_params);
3413                 hwsim_radios_generation++;
3414                 spin_unlock_bh(&hwsim_radio_lock);
3415                 mac80211_hwsim_del_radio(data, wiphy_name(data->hw->wiphy),
3416                                          info);
3417                 kfree(hwname);
3418                 return 0;
3419         }
3420         spin_unlock_bh(&hwsim_radio_lock);
3421
3422         kfree(hwname);
3423         return -ENODEV;
3424 }
3425
3426 static int hwsim_get_radio_nl(struct sk_buff *msg, struct genl_info *info)
3427 {
3428         struct mac80211_hwsim_data *data;
3429         struct sk_buff *skb;
3430         int idx, res = -ENODEV;
3431
3432         if (!info->attrs[HWSIM_ATTR_RADIO_ID])
3433                 return -EINVAL;
3434         idx = nla_get_u32(info->attrs[HWSIM_ATTR_RADIO_ID]);
3435
3436         spin_lock_bh(&hwsim_radio_lock);
3437         list_for_each_entry(data, &hwsim_radios, list) {
3438                 if (data->idx != idx)
3439                         continue;
3440
3441                 if (!net_eq(wiphy_net(data->hw->wiphy), genl_info_net(info)))
3442                         continue;
3443
3444                 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
3445                 if (!skb) {
3446                         res = -ENOMEM;
3447                         goto out_err;
3448                 }
3449
3450                 res = mac80211_hwsim_get_radio(skb, data, info->snd_portid,
3451                                                info->snd_seq, NULL, 0);
3452                 if (res < 0) {
3453                         nlmsg_free(skb);
3454                         goto out_err;
3455                 }
3456
3457                 res = genlmsg_reply(skb, info);
3458                 break;
3459         }
3460
3461 out_err:
3462         spin_unlock_bh(&hwsim_radio_lock);
3463
3464         return res;
3465 }
3466
3467 static int hwsim_dump_radio_nl(struct sk_buff *skb,
3468                                struct netlink_callback *cb)
3469 {
3470         int last_idx = cb->args[0] - 1;
3471         struct mac80211_hwsim_data *data = NULL;
3472         int res = 0;
3473         void *hdr;
3474
3475         spin_lock_bh(&hwsim_radio_lock);
3476         cb->seq = hwsim_radios_generation;
3477
3478         if (last_idx >= hwsim_radio_idx-1)
3479                 goto done;
3480
3481         list_for_each_entry(data, &hwsim_radios, list) {
3482                 if (data->idx <= last_idx)
3483                         continue;
3484
3485                 if (!net_eq(wiphy_net(data->hw->wiphy), sock_net(skb->sk)))
3486                         continue;
3487
3488                 res = mac80211_hwsim_get_radio(skb, data,
3489                                                NETLINK_CB(cb->skb).portid,
3490                                                cb->nlh->nlmsg_seq, cb,
3491                                                NLM_F_MULTI);
3492                 if (res < 0)
3493                         break;
3494
3495                 last_idx = data->idx;
3496         }
3497
3498         cb->args[0] = last_idx + 1;
3499
3500         /* list changed, but no new element sent, set interrupted flag */
3501         if (skb->len == 0 && cb->prev_seq && cb->seq != cb->prev_seq) {
3502                 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid,
3503                                   cb->nlh->nlmsg_seq, &hwsim_genl_family,
3504                                   NLM_F_MULTI, HWSIM_CMD_GET_RADIO);
3505                 if (hdr) {
3506                         genl_dump_check_consistent(cb, hdr);
3507                         genlmsg_end(skb, hdr);
3508                 } else {
3509                         res = -EMSGSIZE;
3510                 }
3511         }
3512
3513 done:
3514         spin_unlock_bh(&hwsim_radio_lock);
3515         return res ?: skb->len;
3516 }
3517
3518 /* Generic Netlink operations array */
3519 static const struct genl_ops hwsim_ops[] = {
3520         {
3521                 .cmd = HWSIM_CMD_REGISTER,
3522                 .policy = hwsim_genl_policy,
3523                 .doit = hwsim_register_received_nl,
3524                 .flags = GENL_UNS_ADMIN_PERM,
3525         },
3526         {
3527                 .cmd = HWSIM_CMD_FRAME,
3528                 .policy = hwsim_genl_policy,
3529                 .doit = hwsim_cloned_frame_received_nl,
3530         },
3531         {
3532                 .cmd = HWSIM_CMD_TX_INFO_FRAME,
3533                 .policy = hwsim_genl_policy,
3534                 .doit = hwsim_tx_info_frame_received_nl,
3535         },
3536         {
3537                 .cmd = HWSIM_CMD_NEW_RADIO,
3538                 .policy = hwsim_genl_policy,
3539                 .doit = hwsim_new_radio_nl,
3540                 .flags = GENL_UNS_ADMIN_PERM,
3541         },
3542         {
3543                 .cmd = HWSIM_CMD_DEL_RADIO,
3544                 .policy = hwsim_genl_policy,
3545                 .doit = hwsim_del_radio_nl,
3546                 .flags = GENL_UNS_ADMIN_PERM,
3547         },
3548         {
3549                 .cmd = HWSIM_CMD_GET_RADIO,
3550                 .policy = hwsim_genl_policy,
3551                 .doit = hwsim_get_radio_nl,
3552                 .dumpit = hwsim_dump_radio_nl,
3553         },
3554 };
3555
3556 static struct genl_family hwsim_genl_family __ro_after_init = {
3557         .name = "MAC80211_HWSIM",
3558         .version = 1,
3559         .maxattr = HWSIM_ATTR_MAX,
3560         .netnsok = true,
3561         .module = THIS_MODULE,
3562         .ops = hwsim_ops,
3563         .n_ops = ARRAY_SIZE(hwsim_ops),
3564         .mcgrps = hwsim_mcgrps,
3565         .n_mcgrps = ARRAY_SIZE(hwsim_mcgrps),
3566 };
3567
3568 static void remove_user_radios(u32 portid)
3569 {
3570         struct mac80211_hwsim_data *entry, *tmp;
3571         LIST_HEAD(list);
3572
3573         spin_lock_bh(&hwsim_radio_lock);
3574         list_for_each_entry_safe(entry, tmp, &hwsim_radios, list) {
3575                 if (entry->destroy_on_close && entry->portid == portid) {
3576                         list_move(&entry->list, &list);
3577                         rhashtable_remove_fast(&hwsim_radios_rht, &entry->rht,
3578                                                hwsim_rht_params);
3579                         hwsim_radios_generation++;
3580                 }
3581         }
3582         spin_unlock_bh(&hwsim_radio_lock);
3583
3584         list_for_each_entry_safe(entry, tmp, &list, list) {
3585                 list_del(&entry->list);
3586                 mac80211_hwsim_del_radio(entry, wiphy_name(entry->hw->wiphy),
3587                                          NULL);
3588         }
3589 }
3590
3591 static int mac80211_hwsim_netlink_notify(struct notifier_block *nb,
3592                                          unsigned long state,
3593                                          void *_notify)
3594 {
3595         struct netlink_notify *notify = _notify;
3596
3597         if (state != NETLINK_URELEASE)
3598                 return NOTIFY_DONE;
3599
3600         remove_user_radios(notify->portid);
3601
3602         if (notify->portid == hwsim_net_get_wmediumd(notify->net)) {
3603                 printk(KERN_INFO "mac80211_hwsim: wmediumd released netlink"
3604                        " socket, switching to perfect channel medium\n");
3605                 hwsim_register_wmediumd(notify->net, 0);
3606         }
3607         return NOTIFY_DONE;
3608
3609 }
3610
3611 static struct notifier_block hwsim_netlink_notifier = {
3612         .notifier_call = mac80211_hwsim_netlink_notify,
3613 };
3614
3615 static int __init hwsim_init_netlink(void)
3616 {
3617         int rc;
3618
3619         printk(KERN_INFO "mac80211_hwsim: initializing netlink\n");
3620
3621         rc = genl_register_family(&hwsim_genl_family);
3622         if (rc)
3623                 goto failure;
3624
3625         rc = netlink_register_notifier(&hwsim_netlink_notifier);
3626         if (rc) {
3627                 genl_unregister_family(&hwsim_genl_family);
3628                 goto failure;
3629         }
3630
3631         return 0;
3632
3633 failure:
3634         pr_debug("mac80211_hwsim: error occurred in %s\n", __func__);
3635         return -EINVAL;
3636 }
3637
3638 static __net_init int hwsim_init_net(struct net *net)
3639 {
3640         return hwsim_net_set_netgroup(net);
3641 }
3642
3643 static void __net_exit hwsim_exit_net(struct net *net)
3644 {
3645         struct mac80211_hwsim_data *data, *tmp;
3646         LIST_HEAD(list);
3647
3648         spin_lock_bh(&hwsim_radio_lock);
3649         list_for_each_entry_safe(data, tmp, &hwsim_radios, list) {
3650                 if (!net_eq(wiphy_net(data->hw->wiphy), net))
3651                         continue;
3652
3653                 /* Radios created in init_net are returned to init_net. */
3654                 if (data->netgroup == hwsim_net_get_netgroup(&init_net))
3655                         continue;
3656
3657                 list_move(&data->list, &list);
3658                 rhashtable_remove_fast(&hwsim_radios_rht, &data->rht,
3659                                        hwsim_rht_params);
3660                 hwsim_radios_generation++;
3661         }
3662         spin_unlock_bh(&hwsim_radio_lock);
3663
3664         list_for_each_entry_safe(data, tmp, &list, list) {
3665                 list_del(&data->list);
3666                 mac80211_hwsim_del_radio(data,
3667                                          wiphy_name(data->hw->wiphy),
3668                                          NULL);
3669         }
3670
3671         ida_simple_remove(&hwsim_netgroup_ida, hwsim_net_get_netgroup(net));
3672 }
3673
3674 static struct pernet_operations hwsim_net_ops = {
3675         .init = hwsim_init_net,
3676         .exit = hwsim_exit_net,
3677         .id   = &hwsim_net_id,
3678         .size = sizeof(struct hwsim_net),
3679 };
3680
3681 static void hwsim_exit_netlink(void)
3682 {
3683         /* unregister the notifier */
3684         netlink_unregister_notifier(&hwsim_netlink_notifier);
3685         /* unregister the family */
3686         genl_unregister_family(&hwsim_genl_family);
3687 }
3688
3689 static int __init init_mac80211_hwsim(void)
3690 {
3691         int i, err;
3692
3693         if (radios < 0 || radios > 100)
3694                 return -EINVAL;
3695
3696         if (channels < 1)
3697                 return -EINVAL;
3698
3699         spin_lock_init(&hwsim_radio_lock);
3700
3701         hwsim_wq = alloc_workqueue("hwsim_wq", 0, 0);
3702         if (!hwsim_wq)
3703                 return -ENOMEM;
3704
3705         err = rhashtable_init(&hwsim_radios_rht, &hwsim_rht_params);
3706         if (err)
3707                 goto out_free_wq;
3708
3709         err = register_pernet_device(&hwsim_net_ops);
3710         if (err)
3711                 goto out_free_rht;
3712
3713         err = platform_driver_register(&mac80211_hwsim_driver);
3714         if (err)
3715                 goto out_unregister_pernet;
3716
3717         err = hwsim_init_netlink();
3718         if (err)
3719                 goto out_unregister_driver;
3720
3721         hwsim_class = class_create(THIS_MODULE, "mac80211_hwsim");
3722         if (IS_ERR(hwsim_class)) {
3723                 err = PTR_ERR(hwsim_class);
3724                 goto out_exit_netlink;
3725         }
3726
3727         for (i = 0; i < radios; i++) {
3728                 struct hwsim_new_radio_params param = { 0 };
3729
3730                 param.channels = channels;
3731
3732                 switch (regtest) {
3733                 case HWSIM_REGTEST_DIFF_COUNTRY:
3734                         if (i < ARRAY_SIZE(hwsim_alpha2s))
3735                                 param.reg_alpha2 = hwsim_alpha2s[i];
3736                         break;
3737                 case HWSIM_REGTEST_DRIVER_REG_FOLLOW:
3738                         if (!i)
3739                                 param.reg_alpha2 = hwsim_alpha2s[0];
3740                         break;
3741                 case HWSIM_REGTEST_STRICT_ALL:
3742                         param.reg_strict = true;
3743                 case HWSIM_REGTEST_DRIVER_REG_ALL:
3744                         param.reg_alpha2 = hwsim_alpha2s[0];
3745                         break;
3746                 case HWSIM_REGTEST_WORLD_ROAM:
3747                         if (i == 0)
3748                                 param.regd = &hwsim_world_regdom_custom_01;
3749                         break;
3750                 case HWSIM_REGTEST_CUSTOM_WORLD:
3751                         param.regd = &hwsim_world_regdom_custom_01;
3752                         break;
3753                 case HWSIM_REGTEST_CUSTOM_WORLD_2:
3754                         if (i == 0)
3755                                 param.regd = &hwsim_world_regdom_custom_01;
3756                         else if (i == 1)
3757                                 param.regd = &hwsim_world_regdom_custom_02;
3758                         break;
3759                 case HWSIM_REGTEST_STRICT_FOLLOW:
3760                         if (i == 0) {
3761                                 param.reg_strict = true;
3762                                 param.reg_alpha2 = hwsim_alpha2s[0];
3763                         }
3764                         break;
3765                 case HWSIM_REGTEST_STRICT_AND_DRIVER_REG:
3766                         if (i == 0) {
3767                                 param.reg_strict = true;
3768                                 param.reg_alpha2 = hwsim_alpha2s[0];
3769                         } else if (i == 1) {
3770                                 param.reg_alpha2 = hwsim_alpha2s[1];
3771                         }
3772                         break;
3773                 case HWSIM_REGTEST_ALL:
3774                         switch (i) {
3775                         case 0:
3776                                 param.regd = &hwsim_world_regdom_custom_01;
3777                                 break;
3778                         case 1:
3779                                 param.regd = &hwsim_world_regdom_custom_02;
3780                                 break;
3781                         case 2:
3782                                 param.reg_alpha2 = hwsim_alpha2s[0];
3783                                 break;
3784                         case 3:
3785                                 param.reg_alpha2 = hwsim_alpha2s[1];
3786                                 break;
3787                         case 4:
3788                                 param.reg_strict = true;
3789                                 param.reg_alpha2 = hwsim_alpha2s[2];
3790                                 break;
3791                         }
3792                         break;
3793                 default:
3794                         break;
3795                 }
3796
3797                 param.p2p_device = support_p2p_device;
3798                 param.use_chanctx = channels > 1;
3799
3800                 err = mac80211_hwsim_new_radio(NULL, &param);
3801                 if (err < 0)
3802                         goto out_free_radios;
3803         }
3804
3805         hwsim_mon = alloc_netdev(0, "hwsim%d", NET_NAME_UNKNOWN,
3806                                  hwsim_mon_setup);
3807         if (hwsim_mon == NULL) {
3808                 err = -ENOMEM;
3809                 goto out_free_radios;
3810         }
3811
3812         rtnl_lock();
3813         err = dev_alloc_name(hwsim_mon, hwsim_mon->name);
3814         if (err < 0) {
3815                 rtnl_unlock();
3816                 goto out_free_radios;
3817         }
3818
3819         err = register_netdevice(hwsim_mon);
3820         if (err < 0) {
3821                 rtnl_unlock();
3822                 goto out_free_mon;
3823         }
3824         rtnl_unlock();
3825
3826         return 0;
3827
3828 out_free_mon:
3829         free_netdev(hwsim_mon);
3830 out_free_radios:
3831         mac80211_hwsim_free();
3832 out_exit_netlink:
3833         hwsim_exit_netlink();
3834 out_unregister_driver:
3835         platform_driver_unregister(&mac80211_hwsim_driver);
3836 out_unregister_pernet:
3837         unregister_pernet_device(&hwsim_net_ops);
3838 out_free_rht:
3839         rhashtable_destroy(&hwsim_radios_rht);
3840 out_free_wq:
3841         destroy_workqueue(hwsim_wq);
3842         return err;
3843 }
3844 module_init(init_mac80211_hwsim);
3845
3846 static void __exit exit_mac80211_hwsim(void)
3847 {
3848         pr_debug("mac80211_hwsim: unregister radios\n");
3849
3850         hwsim_exit_netlink();
3851
3852         mac80211_hwsim_free();
3853         flush_workqueue(hwsim_wq);
3854
3855         rhashtable_destroy(&hwsim_radios_rht);
3856         unregister_netdev(hwsim_mon);
3857         platform_driver_unregister(&mac80211_hwsim_driver);
3858         unregister_pernet_device(&hwsim_net_ops);
3859         destroy_workqueue(hwsim_wq);
3860 }
3861 module_exit(exit_mac80211_hwsim);