drivers/net/wireless/mac80211_hwsim.c

   1 /*
   2  * mac80211_hwsim - software simulator of 802.11 radio(s) for mac80211
   3  * Copyright (c) 2008, Jouni Malinen <j@w1.fi>
   4  * Copyright (c) 2011, Javier Lopez <jlopex@gmail.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 /*
  12  * TODO:
  13  * - Add TSF sync and fix IBSS beacon transmission by adding
  14  *   competition for "air time" at TBTT
  15  * - RX filtering based on filter configuration (data->rx_filter)
  16  */
  17
  18 #include <linux/list.h>
  19 #include <linux/slab.h>
  20 #include <linux/spinlock.h>
  21 #include <net/dst.h>
  22 #include <net/xfrm.h>
  23 #include <net/mac80211.h>
  24 #include <net/ieee80211_radiotap.h>
  25 #include <linux/if_arp.h>
  26 #include <linux/rtnetlink.h>
  27 #include <linux/etherdevice.h>
  28 #include <linux/platform_device.h>
  29 #include <linux/debugfs.h>
  30 #include <linux/module.h>
  31 #include <linux/ktime.h>
  32 #include <net/genetlink.h>
  33 #include <net/net_namespace.h>
  34 #include <net/netns/generic.h>
  35 #include "mac80211_hwsim.h"
  36
  37 #define WARN_QUEUE 100
  38 #define MAX_QUEUE 200
  39
  40 MODULE_AUTHOR("Jouni Malinen");
  41 MODULE_DESCRIPTION("Software simulator of 802.11 radio(s) for mac80211");
  42 MODULE_LICENSE("GPL");
  43
  44 static int radios = 2;
  45 module_param(radios, int, 0444);
  46 MODULE_PARM_DESC(radios, "Number of simulated radios");
  47
  48 static int channels = 1;
  49 module_param(channels, int, 0444);
  50 MODULE_PARM_DESC(channels, "Number of concurrent channels");
  51
  52 static bool paged_rx = false;
  53 module_param(paged_rx, bool, 0644);
  54 MODULE_PARM_DESC(paged_rx, "Use paged SKBs for RX instead of linear ones");
  55
  56 static bool rctbl = false;
  57 module_param(rctbl, bool, 0444);
  58 MODULE_PARM_DESC(rctbl, "Handle rate control table");
  59
  60 static bool support_p2p_device = true;
  61 module_param(support_p2p_device, bool, 0444);
  62 MODULE_PARM_DESC(support_p2p_device, "Support P2P-Device interface type");
  63
  64 /**
  65  * enum hwsim_regtest - the type of regulatory tests we offer
  66  *
  67  * These are the different values you can use for the regtest
  68  * module parameter. This is useful to help test world roaming
  69  * and the driver regulatory_hint() call and combinations of these.
  70  * If you want to do specific alpha2 regulatory domain tests simply
  71  * use the userspace regulatory request as that will be respected as
  72  * well without the need of this module parameter. This is designed
  73  * only for testing the driver regulatory request, world roaming
  74  * and all possible combinations.
  75  *
  76  * @HWSIM_REGTEST_DISABLED: No regulatory tests are performed,
  77  *      this is the default value.
  78  * @HWSIM_REGTEST_DRIVER_REG_FOLLOW: Used for testing the driver regulatory
  79  *      hint, only one driver regulatory hint will be sent as such the
  80  *      secondary radios are expected to follow.
  81  * @HWSIM_REGTEST_DRIVER_REG_ALL: Used for testing the driver regulatory
  82  *      request with all radios reporting the same regulatory domain.
  83  * @HWSIM_REGTEST_DIFF_COUNTRY: Used for testing the drivers calling
  84  *      different regulatory domains requests. Expected behaviour is for
  85  *      an intersection to occur but each device will still use their
  86  *      respective regulatory requested domains. Subsequent radios will
  87  *      use the resulting intersection.
  88  * @HWSIM_REGTEST_WORLD_ROAM: Used for testing the world roaming. We accomplish
  89  *      this by using a custom beacon-capable regulatory domain for the first
  90  *      radio. All other device world roam.
  91  * @HWSIM_REGTEST_CUSTOM_WORLD: Used for testing the custom world regulatory
  92  *      domain requests. All radios will adhere to this custom world regulatory
  93  *      domain.
  94  * @HWSIM_REGTEST_CUSTOM_WORLD_2: Used for testing 2 custom world regulatory
  95  *      domain requests. The first radio will adhere to the first custom world
  96  *      regulatory domain, the second one to the second custom world regulatory
  97  *      domain. All other devices will world roam.
  98  * @HWSIM_REGTEST_STRICT_FOLLOW_: Used for testing strict regulatory domain
  99  *      settings, only the first radio will send a regulatory domain request
 100  *      and use strict settings. The rest of the radios are expected to follow.
 101  * @HWSIM_REGTEST_STRICT_ALL: Used for testing strict regulatory domain
 102  *      settings. All radios will adhere to this.
 103  * @HWSIM_REGTEST_STRICT_AND_DRIVER_REG: Used for testing strict regulatory
 104  *      domain settings, combined with secondary driver regulatory domain
 105  *      settings. The first radio will get a strict regulatory domain setting
 106  *      using the first driver regulatory request and the second radio will use
 107  *      non-strict settings using the second driver regulatory request. All
 108  *      other devices should follow the intersection created between the
 109  *      first two.
 110  * @HWSIM_REGTEST_ALL: Used for testing every possible mix. You will need
 111  *      at least 6 radios for a complete test. We will test in this order:
 112  *      1 - driver custom world regulatory domain
 113  *      2 - second custom world regulatory domain
 114  *      3 - first driver regulatory domain request
 115  *      4 - second driver regulatory domain request
 116  *      5 - strict regulatory domain settings using the third driver regulatory
 117  *          domain request
 118  *      6 and on - should follow the intersection of the 3rd, 4rth and 5th radio
 119  *                 regulatory requests.
 120  */
 121 enum hwsim_regtest {
 122         HWSIM_REGTEST_DISABLED = 0,
 123         HWSIM_REGTEST_DRIVER_REG_FOLLOW = 1,
 124         HWSIM_REGTEST_DRIVER_REG_ALL = 2,
 125         HWSIM_REGTEST_DIFF_COUNTRY = 3,
 126         HWSIM_REGTEST_WORLD_ROAM = 4,
 127         HWSIM_REGTEST_CUSTOM_WORLD = 5,
 128         HWSIM_REGTEST_CUSTOM_WORLD_2 = 6,
 129         HWSIM_REGTEST_STRICT_FOLLOW = 7,
 130         HWSIM_REGTEST_STRICT_ALL = 8,
 131         HWSIM_REGTEST_STRICT_AND_DRIVER_REG = 9,
 132         HWSIM_REGTEST_ALL = 10,
 133 };
 134
 135 /* Set to one of the HWSIM_REGTEST_* values above */
 136 static int regtest = HWSIM_REGTEST_DISABLED;
 137 module_param(regtest, int, 0444);
 138 MODULE_PARM_DESC(regtest, "The type of regulatory test we want to run");
 139
 140 static const char *hwsim_alpha2s[] = {
 141         "FI",
 142         "AL",
 143         "US",
 144         "DE",
 145         "JP",
 146         "AL",
 147 };
 148
 149 static const struct ieee80211_regdomain hwsim_world_regdom_custom_01 = {
 150         .n_reg_rules = 4,
 151         .alpha2 =  "99",
 152         .reg_rules = {
 153                 REG_RULE(2412-10, 2462+10, 40, 0, 20, 0),
 154                 REG_RULE(2484-10, 2484+10, 40, 0, 20, 0),
 155                 REG_RULE(5150-10, 5240+10, 40, 0, 30, 0),
 156                 REG_RULE(5745-10, 5825+10, 40, 0, 30, 0),
 157         }
 158 };
 159
 160 static const struct ieee80211_regdomain hwsim_world_regdom_custom_02 = {
 161         .n_reg_rules = 2,
 162         .alpha2 =  "99",
 163         .reg_rules = {
 164                 REG_RULE(2412-10, 2462+10, 40, 0, 20, 0),
 165                 REG_RULE(5725-10, 5850+10, 40, 0, 30,
 166                          NL80211_RRF_NO_IR),
 167         }
 168 };
 169
 170 static const struct ieee80211_regdomain *hwsim_world_regdom_custom[] = {
 171         &hwsim_world_regdom_custom_01,
 172         &hwsim_world_regdom_custom_02,
 173 };
 174
 175 struct hwsim_vif_priv {
 176         u32 magic;
 177         u8 bssid[ETH_ALEN];
 178         bool assoc;
 179         bool bcn_en;
 180         u16 aid;
 181 };
 182
 183 #define HWSIM_VIF_MAGIC 0x69537748
 184
 185 static inline void hwsim_check_magic(struct ieee80211_vif *vif)
 186 {
 187         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 188         WARN(vp->magic != HWSIM_VIF_MAGIC,
 189              "Invalid VIF (%p) magic %#x, %pM, %d/%d\n",
 190              vif, vp->magic, vif->addr, vif->type, vif->p2p);
 191 }
 192
 193 static inline void hwsim_set_magic(struct ieee80211_vif *vif)
 194 {
 195         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 196         vp->magic = HWSIM_VIF_MAGIC;
 197 }
 198
 199 static inline void hwsim_clear_magic(struct ieee80211_vif *vif)
 200 {
 201         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 202         vp->magic = 0;
 203 }
 204
 205 struct hwsim_sta_priv {
 206         u32 magic;
 207 };
 208
 209 #define HWSIM_STA_MAGIC 0x6d537749
 210
 211 static inline void hwsim_check_sta_magic(struct ieee80211_sta *sta)
 212 {
 213         struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
 214         WARN_ON(sp->magic != HWSIM_STA_MAGIC);
 215 }
 216
 217 static inline void hwsim_set_sta_magic(struct ieee80211_sta *sta)
 218 {
 219         struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
 220         sp->magic = HWSIM_STA_MAGIC;
 221 }
 222
 223 static inline void hwsim_clear_sta_magic(struct ieee80211_sta *sta)
 224 {
 225         struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
 226         sp->magic = 0;
 227 }
 228
 229 struct hwsim_chanctx_priv {
 230         u32 magic;
 231 };
 232
 233 #define HWSIM_CHANCTX_MAGIC 0x6d53774a
 234
 235 static inline void hwsim_check_chanctx_magic(struct ieee80211_chanctx_conf *c)
 236 {
 237         struct hwsim_chanctx_priv *cp = (void *)c->drv_priv;
 238         WARN_ON(cp->magic != HWSIM_CHANCTX_MAGIC);
 239 }
 240
 241 static inline void hwsim_set_chanctx_magic(struct ieee80211_chanctx_conf *c)
 242 {
 243         struct hwsim_chanctx_priv *cp = (void *)c->drv_priv;
 244         cp->magic = HWSIM_CHANCTX_MAGIC;
 245 }
 246
 247 static inline void hwsim_clear_chanctx_magic(struct ieee80211_chanctx_conf *c)
 248 {
 249         struct hwsim_chanctx_priv *cp = (void *)c->drv_priv;
 250         cp->magic = 0;
 251 }
 252
 253 static unsigned int hwsim_net_id;
 254
 255 static int hwsim_netgroup;
 256
 257 struct hwsim_net {
 258         int netgroup;
 259         u32 wmediumd;
 260 };
 261
 262 static inline int hwsim_net_get_netgroup(struct net *net)
 263 {
 264         struct hwsim_net *hwsim_net = net_generic(net, hwsim_net_id);
 265
 266         return hwsim_net->netgroup;
 267 }
 268
 269 static inline void hwsim_net_set_netgroup(struct net *net)
 270 {
 271         struct hwsim_net *hwsim_net = net_generic(net, hwsim_net_id);
 272
 273         hwsim_net->netgroup = hwsim_netgroup++;
 274 }
 275
 276 static inline u32 hwsim_net_get_wmediumd(struct net *net)
 277 {
 278         struct hwsim_net *hwsim_net = net_generic(net, hwsim_net_id);
 279
 280         return hwsim_net->wmediumd;
 281 }
 282
 283 static inline void hwsim_net_set_wmediumd(struct net *net, u32 portid)
 284 {
 285         struct hwsim_net *hwsim_net = net_generic(net, hwsim_net_id);
 286
 287         hwsim_net->wmediumd = portid;
 288 }
 289
 290 static struct class *hwsim_class;
 291
 292 static struct net_device *hwsim_mon; /* global monitor netdev */
 293
 294 #define CHAN2G(_freq)  { \
 295         .band = NL80211_BAND_2GHZ, \
 296         .center_freq = (_freq), \
 297         .hw_value = (_freq), \
 298         .max_power = 20, \
 299 }
 300
 301 #define CHAN5G(_freq) { \
 302         .band = NL80211_BAND_5GHZ, \
 303         .center_freq = (_freq), \
 304         .hw_value = (_freq), \
 305         .max_power = 20, \
 306 }
 307
 308 static const struct ieee80211_channel hwsim_channels_2ghz[] = {
 309         CHAN2G(2412), /* Channel 1 */
 310         CHAN2G(2417), /* Channel 2 */
 311         CHAN2G(2422), /* Channel 3 */
 312         CHAN2G(2427), /* Channel 4 */
 313         CHAN2G(2432), /* Channel 5 */
 314         CHAN2G(2437), /* Channel 6 */
 315         CHAN2G(2442), /* Channel 7 */
 316         CHAN2G(2447), /* Channel 8 */
 317         CHAN2G(2452), /* Channel 9 */
 318         CHAN2G(2457), /* Channel 10 */
 319         CHAN2G(2462), /* Channel 11 */
 320         CHAN2G(2467), /* Channel 12 */
 321         CHAN2G(2472), /* Channel 13 */
 322         CHAN2G(2484), /* Channel 14 */
 323 };
 324
 325 static const struct ieee80211_channel hwsim_channels_5ghz[] = {
 326         CHAN5G(5180), /* Channel 36 */
 327         CHAN5G(5200), /* Channel 40 */
 328         CHAN5G(5220), /* Channel 44 */
 329         CHAN5G(5240), /* Channel 48 */
 330
 331         CHAN5G(5260), /* Channel 52 */
 332         CHAN5G(5280), /* Channel 56 */
 333         CHAN5G(5300), /* Channel 60 */
 334         CHAN5G(5320), /* Channel 64 */
 335
 336         CHAN5G(5500), /* Channel 100 */
 337         CHAN5G(5520), /* Channel 104 */
 338         CHAN5G(5540), /* Channel 108 */
 339         CHAN5G(5560), /* Channel 112 */
 340         CHAN5G(5580), /* Channel 116 */
 341         CHAN5G(5600), /* Channel 120 */
 342         CHAN5G(5620), /* Channel 124 */
 343         CHAN5G(5640), /* Channel 128 */
 344         CHAN5G(5660), /* Channel 132 */
 345         CHAN5G(5680), /* Channel 136 */
 346         CHAN5G(5700), /* Channel 140 */
 347
 348         CHAN5G(5745), /* Channel 149 */
 349         CHAN5G(5765), /* Channel 153 */
 350         CHAN5G(5785), /* Channel 157 */
 351         CHAN5G(5805), /* Channel 161 */
 352         CHAN5G(5825), /* Channel 165 */
 353         CHAN5G(5845), /* Channel 169 */
 354 };
 355
 356 static const struct ieee80211_rate hwsim_rates[] = {
 357         { .bitrate = 10 },
 358         { .bitrate = 20, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
 359         { .bitrate = 55, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
 360         { .bitrate = 110, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
 361         { .bitrate = 60 },
 362         { .bitrate = 90 },
 363         { .bitrate = 120 },
 364         { .bitrate = 180 },
 365         { .bitrate = 240 },
 366         { .bitrate = 360 },
 367         { .bitrate = 480 },
 368         { .bitrate = 540 }
 369 };
 370
 371 #define OUI_QCA 0x001374
 372 #define QCA_NL80211_SUBCMD_TEST 1
 373 enum qca_nl80211_vendor_subcmds {
 374         QCA_WLAN_VENDOR_ATTR_TEST = 8,
 375         QCA_WLAN_VENDOR_ATTR_MAX = QCA_WLAN_VENDOR_ATTR_TEST
 376 };
 377
 378 static const struct nla_policy
 379 hwsim_vendor_test_policy[QCA_WLAN_VENDOR_ATTR_MAX + 1] = {
 380         [QCA_WLAN_VENDOR_ATTR_MAX] = { .type = NLA_U32 },
 381 };
 382
 383 static int mac80211_hwsim_vendor_cmd_test(struct wiphy *wiphy,
 384                                           struct wireless_dev *wdev,
 385                                           const void *data, int data_len)
 386 {
 387         struct sk_buff *skb;
 388         struct nlattr *tb[QCA_WLAN_VENDOR_ATTR_MAX + 1];
 389         int err;
 390         u32 val;
 391
 392         err = nla_parse(tb, QCA_WLAN_VENDOR_ATTR_MAX, data, data_len,
 393                         hwsim_vendor_test_policy, NULL);
 394         if (err)
 395                 return err;
 396         if (!tb[QCA_WLAN_VENDOR_ATTR_TEST])
 397                 return -EINVAL;
 398         val = nla_get_u32(tb[QCA_WLAN_VENDOR_ATTR_TEST]);
 399         wiphy_debug(wiphy, "%s: test=%u\n", __func__, val);
 400
 401         /* Send a vendor event as a test. Note that this would not normally be
 402          * done within a command handler, but rather, based on some other
 403          * trigger. For simplicity, this command is used to trigger the event
 404          * here.
 405          *
 406          * event_idx = 0 (index in mac80211_hwsim_vendor_commands)
 407          */
 408         skb = cfg80211_vendor_event_alloc(wiphy, wdev, 100, 0, GFP_KERNEL);
 409         if (skb) {
 410                 /* skb_put() or nla_put() will fill up data within
 411                  * NL80211_ATTR_VENDOR_DATA.
 412                  */
 413
 414                 /* Add vendor data */
 415                 nla_put_u32(skb, QCA_WLAN_VENDOR_ATTR_TEST, val + 1);
 416
 417                 /* Send the event - this will call nla_nest_end() */
 418                 cfg80211_vendor_event(skb, GFP_KERNEL);
 419         }
 420
 421         /* Send a response to the command */
 422         skb = cfg80211_vendor_cmd_alloc_reply_skb(wiphy, 10);
 423         if (!skb)
 424                 return -ENOMEM;
 425
 426         /* skb_put() or nla_put() will fill up data within
 427          * NL80211_ATTR_VENDOR_DATA
 428          */
 429         nla_put_u32(skb, QCA_WLAN_VENDOR_ATTR_TEST, val + 2);
 430
 431         return cfg80211_vendor_cmd_reply(skb);
 432 }
 433
 434 static struct wiphy_vendor_command mac80211_hwsim_vendor_commands[] = {
 435         {
 436                 .info = { .vendor_id = OUI_QCA,
 437                           .subcmd = QCA_NL80211_SUBCMD_TEST },
 438                 .flags = WIPHY_VENDOR_CMD_NEED_NETDEV,
 439                 .doit = mac80211_hwsim_vendor_cmd_test,
 440         }
 441 };
 442
 443 /* Advertise support vendor specific events */
 444 static const struct nl80211_vendor_cmd_info mac80211_hwsim_vendor_events[] = {
 445         { .vendor_id = OUI_QCA, .subcmd = 1 },
 446 };
 447
 448 static const struct ieee80211_iface_limit hwsim_if_limits[] = {
 449         { .max = 1, .types = BIT(NL80211_IFTYPE_ADHOC) },
 450         { .max = 2048,  .types = BIT(NL80211_IFTYPE_STATION) |
 451                                  BIT(NL80211_IFTYPE_P2P_CLIENT) |
 452 #ifdef CONFIG_MAC80211_MESH
 453                                  BIT(NL80211_IFTYPE_MESH_POINT) |
 454 #endif
 455                                  BIT(NL80211_IFTYPE_AP) |
 456                                  BIT(NL80211_IFTYPE_P2P_GO) },
 457         /* must be last, see hwsim_if_comb */
 458         { .max = 1, .types = BIT(NL80211_IFTYPE_P2P_DEVICE) }
 459 };
 460
 461 static const struct ieee80211_iface_combination hwsim_if_comb[] = {
 462         {
 463                 .limits = hwsim_if_limits,
 464                 /* remove the last entry which is P2P_DEVICE */
 465                 .n_limits = ARRAY_SIZE(hwsim_if_limits) - 1,
 466                 .max_interfaces = 2048,
 467                 .num_different_channels = 1,
 468                 .radar_detect_widths = BIT(NL80211_CHAN_WIDTH_20_NOHT) |
 469                                        BIT(NL80211_CHAN_WIDTH_20) |
 470                                        BIT(NL80211_CHAN_WIDTH_40) |
 471                                        BIT(NL80211_CHAN_WIDTH_80) |
 472                                        BIT(NL80211_CHAN_WIDTH_160),
 473         },
 474 };
 475
 476 static const struct ieee80211_iface_combination hwsim_if_comb_p2p_dev[] = {
 477         {
 478                 .limits = hwsim_if_limits,
 479                 .n_limits = ARRAY_SIZE(hwsim_if_limits),
 480                 .max_interfaces = 2048,
 481                 .num_different_channels = 1,
 482                 .radar_detect_widths = BIT(NL80211_CHAN_WIDTH_20_NOHT) |
 483                                        BIT(NL80211_CHAN_WIDTH_20) |
 484                                        BIT(NL80211_CHAN_WIDTH_40) |
 485                                        BIT(NL80211_CHAN_WIDTH_80) |
 486                                        BIT(NL80211_CHAN_WIDTH_160),
 487         },
 488 };
 489
 490 static spinlock_t hwsim_radio_lock;
 491 static LIST_HEAD(hwsim_radios);
 492 static int hwsim_radio_idx;
 493
 494 static struct platform_driver mac80211_hwsim_driver = {
 495         .driver = {
 496                 .name = "mac80211_hwsim",
 497         },
 498 };
 499
 500 struct mac80211_hwsim_data {
 501         struct list_head list;
 502         struct ieee80211_hw *hw;
 503         struct device *dev;
 504         struct ieee80211_supported_band bands[NUM_NL80211_BANDS];
 505         struct ieee80211_channel channels_2ghz[ARRAY_SIZE(hwsim_channels_2ghz)];
 506         struct ieee80211_channel channels_5ghz[ARRAY_SIZE(hwsim_channels_5ghz)];
 507         struct ieee80211_rate rates[ARRAY_SIZE(hwsim_rates)];
 508         struct ieee80211_iface_combination if_combination;
 509
 510         struct mac_address addresses[2];
 511         int channels, idx;
 512         bool use_chanctx;
 513         bool destroy_on_close;
 514         struct work_struct destroy_work;
 515         u32 portid;
 516         char alpha2[2];
 517         const struct ieee80211_regdomain *regd;
 518
 519         struct ieee80211_channel *tmp_chan;
 520         struct ieee80211_channel *roc_chan;
 521         u32 roc_duration;
 522         struct delayed_work roc_start;
 523         struct delayed_work roc_done;
 524         struct delayed_work hw_scan;
 525         struct cfg80211_scan_request *hw_scan_request;
 526         struct ieee80211_vif *hw_scan_vif;
 527         int scan_chan_idx;
 528         u8 scan_addr[ETH_ALEN];
 529         struct {
 530                 struct ieee80211_channel *channel;
 531                 unsigned long next_start, start, end;
 532         } survey_data[ARRAY_SIZE(hwsim_channels_2ghz) +
 533                       ARRAY_SIZE(hwsim_channels_5ghz)];
 534
 535         struct ieee80211_channel *channel;
 536         u64 beacon_int  /* beacon interval in us */;
 537         unsigned int rx_filter;
 538         bool started, idle, scanning;
 539         struct mutex mutex;
 540         struct tasklet_hrtimer beacon_timer;
 541         enum ps_mode {
 542                 PS_DISABLED, PS_ENABLED, PS_AUTO_POLL, PS_MANUAL_POLL
 543         } ps;
 544         bool ps_poll_pending;
 545         struct dentry *debugfs;
 546
 547         uintptr_t pending_cookie;
 548         struct sk_buff_head pending;    /* packets pending */
 549         /*
 550          * Only radios in the same group can communicate together (the
 551          * channel has to match too). Each bit represents a group. A
 552          * radio can be in more than one group.
 553          */
 554         u64 group;
 555
 556         /* group shared by radios created in the same netns */
 557         int netgroup;
 558         /* wmediumd portid responsible for netgroup of this radio */
 559         u32 wmediumd;
 560
 561         /* difference between this hw's clock and the real clock, in usecs */
 562         s64 tsf_offset;
 563         s64 bcn_delta;
 564         /* absolute beacon transmission time. Used to cover up "tx" delay. */
 565         u64 abs_bcn_ts;
 566
 567         /* Stats */
 568         u64 tx_pkts;
 569         u64 rx_pkts;
 570         u64 tx_bytes;
 571         u64 rx_bytes;
 572         u64 tx_dropped;
 573         u64 tx_failed;
 574 };
 575
 576
 577 struct hwsim_radiotap_hdr {
 578         struct ieee80211_radiotap_header hdr;
 579         __le64 rt_tsft;
 580         u8 rt_flags;
 581         u8 rt_rate;
 582         __le16 rt_channel;
 583         __le16 rt_chbitmask;
 584 } __packed;
 585
 586 struct hwsim_radiotap_ack_hdr {
 587         struct ieee80211_radiotap_header hdr;
 588         u8 rt_flags;
 589         u8 pad;
 590         __le16 rt_channel;
 591         __le16 rt_chbitmask;
 592 } __packed;
 593
 594 /* MAC80211_HWSIM netlink family */
 595 static struct genl_family hwsim_genl_family;
 596
 597 enum hwsim_multicast_groups {
 598         HWSIM_MCGRP_CONFIG,
 599 };
 600
 601 static const struct genl_multicast_group hwsim_mcgrps[] = {
 602         [HWSIM_MCGRP_CONFIG] = { .name = "config", },
 603 };
 604
 605 /* MAC80211_HWSIM netlink policy */
 606
 607 static const struct nla_policy hwsim_genl_policy[HWSIM_ATTR_MAX + 1] = {
 608         [HWSIM_ATTR_ADDR_RECEIVER] = { .type = NLA_UNSPEC, .len = ETH_ALEN },
 609         [HWSIM_ATTR_ADDR_TRANSMITTER] = { .type = NLA_UNSPEC, .len = ETH_ALEN },
 610         [HWSIM_ATTR_FRAME] = { .type = NLA_BINARY,
 611                                .len = IEEE80211_MAX_DATA_LEN },
 612         [HWSIM_ATTR_FLAGS] = { .type = NLA_U32 },
 613         [HWSIM_ATTR_RX_RATE] = { .type = NLA_U32 },
 614         [HWSIM_ATTR_SIGNAL] = { .type = NLA_U32 },
 615         [HWSIM_ATTR_TX_INFO] = { .type = NLA_UNSPEC,
 616                                  .len = IEEE80211_TX_MAX_RATES *
 617                                         sizeof(struct hwsim_tx_rate)},
 618         [HWSIM_ATTR_COOKIE] = { .type = NLA_U64 },
 619         [HWSIM_ATTR_CHANNELS] = { .type = NLA_U32 },
 620         [HWSIM_ATTR_RADIO_ID] = { .type = NLA_U32 },
 621         [HWSIM_ATTR_REG_HINT_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 622         [HWSIM_ATTR_REG_CUSTOM_REG] = { .type = NLA_U32 },
 623         [HWSIM_ATTR_REG_STRICT_REG] = { .type = NLA_FLAG },
 624         [HWSIM_ATTR_SUPPORT_P2P_DEVICE] = { .type = NLA_FLAG },
 625         [HWSIM_ATTR_DESTROY_RADIO_ON_CLOSE] = { .type = NLA_FLAG },
 626         [HWSIM_ATTR_RADIO_NAME] = { .type = NLA_STRING },
 627         [HWSIM_ATTR_NO_VIF] = { .type = NLA_FLAG },
 628         [HWSIM_ATTR_FREQ] = { .type = NLA_U32 },
 629 };
 630
 631 static void mac80211_hwsim_tx_frame(struct ieee80211_hw *hw,
 632                                     struct sk_buff *skb,
 633                                     struct ieee80211_channel *chan);
 634
 635 /* sysfs attributes */
 636 static void hwsim_send_ps_poll(void *dat, u8 *mac, struct ieee80211_vif *vif)
 637 {
 638         struct mac80211_hwsim_data *data = dat;
 639         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 640         struct sk_buff *skb;
 641         struct ieee80211_pspoll *pspoll;
 642
 643         if (!vp->assoc)
 644                 return;
 645
 646         wiphy_debug(data->hw->wiphy,
 647                     "%s: send PS-Poll to %pM for aid %d\n",
 648                     __func__, vp->bssid, vp->aid);
 649
 650         skb = dev_alloc_skb(sizeof(*pspoll));
 651         if (!skb)
 652                 return;
 653         pspoll = skb_put(skb, sizeof(*pspoll));
 654         pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
 655                                             IEEE80211_STYPE_PSPOLL |
 656                                             IEEE80211_FCTL_PM);
 657         pspoll->aid = cpu_to_le16(0xc000 | vp->aid);
 658         memcpy(pspoll->bssid, vp->bssid, ETH_ALEN);
 659         memcpy(pspoll->ta, mac, ETH_ALEN);
 660
 661         rcu_read_lock();
 662         mac80211_hwsim_tx_frame(data->hw, skb,
 663                                 rcu_dereference(vif->chanctx_conf)->def.chan);
 664         rcu_read_unlock();
 665 }
 666
 667 static void hwsim_send_nullfunc(struct mac80211_hwsim_data *data, u8 *mac,
 668                                 struct ieee80211_vif *vif, int ps)
 669 {
 670         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 671         struct sk_buff *skb;
 672         struct ieee80211_hdr *hdr;
 673         struct ieee80211_tx_info *cb;
 674
 675         if (!vp->assoc)
 676                 return;
 677
 678         wiphy_debug(data->hw->wiphy,
 679                     "%s: send data::nullfunc to %pM ps=%d\n",
 680                     __func__, vp->bssid, ps);
 681
 682         skb = dev_alloc_skb(sizeof(*hdr));
 683         if (!skb)
 684                 return;
 685         hdr = skb_put(skb, sizeof(*hdr) - ETH_ALEN);
 686         hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
 687                                          IEEE80211_STYPE_NULLFUNC |
 688                                          (ps ? IEEE80211_FCTL_PM : 0));
 689         hdr->duration_id = cpu_to_le16(0);
 690         memcpy(hdr->addr1, vp->bssid, ETH_ALEN);
 691         memcpy(hdr->addr2, mac, ETH_ALEN);
 692         memcpy(hdr->addr3, vp->bssid, ETH_ALEN);
 693
 694         cb = IEEE80211_SKB_CB(skb);
 695         cb->control.rates[0].count = 1;
 696         cb->control.rates[1].idx = -1;
 697
 698         rcu_read_lock();
 699         mac80211_hwsim_tx_frame(data->hw, skb,
 700                                 rcu_dereference(vif->chanctx_conf)->def.chan);
 701         rcu_read_unlock();
 702 }
 703
 704
 705 static void hwsim_send_nullfunc_ps(void *dat, u8 *mac,
 706                                    struct ieee80211_vif *vif)
 707 {
 708         struct mac80211_hwsim_data *data = dat;
 709         hwsim_send_nullfunc(data, mac, vif, 1);
 710 }
 711
 712 static void hwsim_send_nullfunc_no_ps(void *dat, u8 *mac,
 713                                       struct ieee80211_vif *vif)
 714 {
 715         struct mac80211_hwsim_data *data = dat;
 716         hwsim_send_nullfunc(data, mac, vif, 0);
 717 }
 718
 719 static int hwsim_fops_ps_read(void *dat, u64 *val)
 720 {
 721         struct mac80211_hwsim_data *data = dat;
 722         *val = data->ps;
 723         return 0;
 724 }
 725
 726 static int hwsim_fops_ps_write(void *dat, u64 val)
 727 {
 728         struct mac80211_hwsim_data *data = dat;
 729         enum ps_mode old_ps;
 730
 731         if (val != PS_DISABLED && val != PS_ENABLED && val != PS_AUTO_POLL &&
 732             val != PS_MANUAL_POLL)
 733                 return -EINVAL;
 734
 735         if (val == PS_MANUAL_POLL) {
 736                 if (data->ps != PS_ENABLED)
 737                         return -EINVAL;
 738                 local_bh_disable();
 739                 ieee80211_iterate_active_interfaces_atomic(
 740                         data->hw, IEEE80211_IFACE_ITER_NORMAL,
 741                         hwsim_send_ps_poll, data);
 742                 local_bh_enable();
 743                 return 0;
 744         }
 745         old_ps = data->ps;
 746         data->ps = val;
 747
 748         local_bh_disable();
 749         if (old_ps == PS_DISABLED && val != PS_DISABLED) {
 750                 ieee80211_iterate_active_interfaces_atomic(
 751                         data->hw, IEEE80211_IFACE_ITER_NORMAL,
 752                         hwsim_send_nullfunc_ps, data);
 753         } else if (old_ps != PS_DISABLED && val == PS_DISABLED) {
 754                 ieee80211_iterate_active_interfaces_atomic(
 755                         data->hw, IEEE80211_IFACE_ITER_NORMAL,
 756                         hwsim_send_nullfunc_no_ps, data);
 757         }
 758         local_bh_enable();
 759
 760         return 0;
 761 }
 762
 763 DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_ps, hwsim_fops_ps_read, hwsim_fops_ps_write,
 764                         "%llu\n");
 765
 766 static int hwsim_write_simulate_radar(void *dat, u64 val)
 767 {
 768         struct mac80211_hwsim_data *data = dat;
 769
 770         ieee80211_radar_detected(data->hw);
 771
 772         return 0;
 773 }
 774
 775 DEFINE_SIMPLE_ATTRIBUTE(hwsim_simulate_radar, NULL,
 776                         hwsim_write_simulate_radar, "%llu\n");
 777
 778 static int hwsim_fops_group_read(void *dat, u64 *val)
 779 {
 780         struct mac80211_hwsim_data *data = dat;
 781         *val = data->group;
 782         return 0;
 783 }
 784
 785 static int hwsim_fops_group_write(void *dat, u64 val)
 786 {
 787         struct mac80211_hwsim_data *data = dat;
 788         data->group = val;
 789         return 0;
 790 }
 791
 792 DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_group,
 793                         hwsim_fops_group_read, hwsim_fops_group_write,
 794                         "%llx\n");
 795
 796 static netdev_tx_t hwsim_mon_xmit(struct sk_buff *skb,
 797                                         struct net_device *dev)
 798 {
 799         /* TODO: allow packet injection */
 800         dev_kfree_skb(skb);
 801         return NETDEV_TX_OK;
 802 }
 803
 804 static inline u64 mac80211_hwsim_get_tsf_raw(void)
 805 {
 806         return ktime_to_us(ktime_get_real());
 807 }
 808
 809 static __le64 __mac80211_hwsim_get_tsf(struct mac80211_hwsim_data *data)
 810 {
 811         u64 now = mac80211_hwsim_get_tsf_raw();
 812         return cpu_to_le64(now + data->tsf_offset);
 813 }
 814
 815 static u64 mac80211_hwsim_get_tsf(struct ieee80211_hw *hw,
 816                                   struct ieee80211_vif *vif)
 817 {
 818         struct mac80211_hwsim_data *data = hw->priv;
 819         return le64_to_cpu(__mac80211_hwsim_get_tsf(data));
 820 }
 821
 822 static void mac80211_hwsim_set_tsf(struct ieee80211_hw *hw,
 823                 struct ieee80211_vif *vif, u64 tsf)
 824 {
 825         struct mac80211_hwsim_data *data = hw->priv;
 826         u64 now = mac80211_hwsim_get_tsf(hw, vif);
 827         u32 bcn_int = data->beacon_int;
 828         u64 delta = abs(tsf - now);
 829
 830         /* adjust after beaconing with new timestamp at old TBTT */
 831         if (tsf > now) {
 832                 data->tsf_offset += delta;
 833                 data->bcn_delta = do_div(delta, bcn_int);
 834         } else {
 835                 data->tsf_offset -= delta;
 836                 data->bcn_delta = -(s64)do_div(delta, bcn_int);
 837         }
 838 }
 839
 840 static void mac80211_hwsim_monitor_rx(struct ieee80211_hw *hw,
 841                                       struct sk_buff *tx_skb,
 842                                       struct ieee80211_channel *chan)
 843 {
 844         struct mac80211_hwsim_data *data = hw->priv;
 845         struct sk_buff *skb;
 846         struct hwsim_radiotap_hdr *hdr;
 847         u16 flags;
 848         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_skb);
 849         struct ieee80211_rate *txrate = ieee80211_get_tx_rate(hw, info);
 850
 851         if (WARN_ON(!txrate))
 852                 return;
 853
 854         if (!netif_running(hwsim_mon))
 855                 return;
 856
 857         skb = skb_copy_expand(tx_skb, sizeof(*hdr), 0, GFP_ATOMIC);
 858         if (skb == NULL)
 859                 return;
 860
 861         hdr = skb_push(skb, sizeof(*hdr));
 862         hdr->hdr.it_version = PKTHDR_RADIOTAP_VERSION;
 863         hdr->hdr.it_pad = 0;
 864         hdr->hdr.it_len = cpu_to_le16(sizeof(*hdr));
 865         hdr->hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
 866                                           (1 << IEEE80211_RADIOTAP_RATE) |
 867                                           (1 << IEEE80211_RADIOTAP_TSFT) |
 868                                           (1 << IEEE80211_RADIOTAP_CHANNEL));
 869         hdr->rt_tsft = __mac80211_hwsim_get_tsf(data);
 870         hdr->rt_flags = 0;
 871         hdr->rt_rate = txrate->bitrate / 5;
 872         hdr->rt_channel = cpu_to_le16(chan->center_freq);
 873         flags = IEEE80211_CHAN_2GHZ;
 874         if (txrate->flags & IEEE80211_RATE_ERP_G)
 875                 flags |= IEEE80211_CHAN_OFDM;
 876         else
 877                 flags |= IEEE80211_CHAN_CCK;
 878         hdr->rt_chbitmask = cpu_to_le16(flags);
 879
 880         skb->dev = hwsim_mon;
 881         skb_reset_mac_header(skb);
 882         skb->ip_summed = CHECKSUM_UNNECESSARY;
 883         skb->pkt_type = PACKET_OTHERHOST;
 884         skb->protocol = htons(ETH_P_802_2);
 885         memset(skb->cb, 0, sizeof(skb->cb));
 886         netif_rx(skb);
 887 }
 888
 889
 890 static void mac80211_hwsim_monitor_ack(struct ieee80211_channel *chan,
 891                                        const u8 *addr)
 892 {
 893         struct sk_buff *skb;
 894         struct hwsim_radiotap_ack_hdr *hdr;
 895         u16 flags;
 896         struct ieee80211_hdr *hdr11;
 897
 898         if (!netif_running(hwsim_mon))
 899                 return;
 900
 901         skb = dev_alloc_skb(100);
 902         if (skb == NULL)
 903                 return;
 904
 905         hdr = skb_put(skb, sizeof(*hdr));
 906         hdr->hdr.it_version = PKTHDR_RADIOTAP_VERSION;
 907         hdr->hdr.it_pad = 0;
 908         hdr->hdr.it_len = cpu_to_le16(sizeof(*hdr));
 909         hdr->hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
 910                                           (1 << IEEE80211_RADIOTAP_CHANNEL));
 911         hdr->rt_flags = 0;
 912         hdr->pad = 0;
 913         hdr->rt_channel = cpu_to_le16(chan->center_freq);
 914         flags = IEEE80211_CHAN_2GHZ;
 915         hdr->rt_chbitmask = cpu_to_le16(flags);
 916
 917         hdr11 = skb_put(skb, 10);
 918         hdr11->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
 919                                            IEEE80211_STYPE_ACK);
 920         hdr11->duration_id = cpu_to_le16(0);
 921         memcpy(hdr11->addr1, addr, ETH_ALEN);
 922
 923         skb->dev = hwsim_mon;
 924         skb_reset_mac_header(skb);
 925         skb->ip_summed = CHECKSUM_UNNECESSARY;
 926         skb->pkt_type = PACKET_OTHERHOST;
 927         skb->protocol = htons(ETH_P_802_2);
 928         memset(skb->cb, 0, sizeof(skb->cb));
 929         netif_rx(skb);
 930 }
 931
 932 struct mac80211_hwsim_addr_match_data {
 933         u8 addr[ETH_ALEN];
 934         bool ret;
 935 };
 936
 937 static void mac80211_hwsim_addr_iter(void *data, u8 *mac,
 938                                      struct ieee80211_vif *vif)
 939 {
 940         struct mac80211_hwsim_addr_match_data *md = data;
 941
 942         if (memcmp(mac, md->addr, ETH_ALEN) == 0)
 943                 md->ret = true;
 944 }
 945
 946 static bool mac80211_hwsim_addr_match(struct mac80211_hwsim_data *data,
 947                                       const u8 *addr)
 948 {
 949         struct mac80211_hwsim_addr_match_data md = {
 950                 .ret = false,
 951         };
 952
 953         if (data->scanning && memcmp(addr, data->scan_addr, ETH_ALEN) == 0)
 954                 return true;
 955
 956         memcpy(md.addr, addr, ETH_ALEN);
 957
 958         ieee80211_iterate_active_interfaces_atomic(data->hw,
 959                                                    IEEE80211_IFACE_ITER_NORMAL,
 960                                                    mac80211_hwsim_addr_iter,
 961                                                    &md);
 962
 963         return md.ret;
 964 }
 965
 966 static bool hwsim_ps_rx_ok(struct mac80211_hwsim_data *data,
 967                            struct sk_buff *skb)
 968 {
 969         switch (data->ps) {
 970         case PS_DISABLED:
 971                 return true;
 972         case PS_ENABLED:
 973                 return false;
 974         case PS_AUTO_POLL:
 975                 /* TODO: accept (some) Beacons by default and other frames only
 976                  * if pending PS-Poll has been sent */
 977                 return true;
 978         case PS_MANUAL_POLL:
 979                 /* Allow unicast frames to own address if there is a pending
 980                  * PS-Poll */
 981                 if (data->ps_poll_pending &&
 982                     mac80211_hwsim_addr_match(data, skb->data + 4)) {
 983                         data->ps_poll_pending = false;
 984                         return true;
 985                 }
 986                 return false;
 987         }
 988
 989         return true;
 990 }
 991
 992 static int hwsim_unicast_netgroup(struct mac80211_hwsim_data *data,
 993                                   struct sk_buff *skb, int portid)
 994 {
 995         struct net *net;
 996         bool found = false;
 997         int res = -ENOENT;
 998
 999         rcu_read_lock();
1000         for_each_net_rcu(net) {
1001                 if (data->netgroup == hwsim_net_get_netgroup(net)) {
1002                         res = genlmsg_unicast(net, skb, portid);
1003                         found = true;
1004                         break;
1005                 }
1006         }
1007         rcu_read_unlock();
1008
1009         if (!found)
1010                 nlmsg_free(skb);
1011
1012         return res;
1013 }
1014
1015 static void mac80211_hwsim_tx_frame_nl(struct ieee80211_hw *hw,
1016                                        struct sk_buff *my_skb,
1017                                        int dst_portid)
1018 {
1019         struct sk_buff *skb;
1020         struct mac80211_hwsim_data *data = hw->priv;
1021         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) my_skb->data;
1022         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(my_skb);
1023         void *msg_head;
1024         unsigned int hwsim_flags = 0;
1025         int i;
1026         struct hwsim_tx_rate tx_attempts[IEEE80211_TX_MAX_RATES];
1027         uintptr_t cookie;
1028
1029         if (data->ps != PS_DISABLED)
1030                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1031         /* If the queue contains MAX_QUEUE skb's drop some */
1032         if (skb_queue_len(&data->pending) >= MAX_QUEUE) {
1033                 /* Droping until WARN_QUEUE level */
1034                 while (skb_queue_len(&data->pending) >= WARN_QUEUE) {
1035                         ieee80211_free_txskb(hw, skb_dequeue(&data->pending));
1036                         data->tx_dropped++;
1037                 }
1038         }
1039
1040         skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1041         if (skb == NULL)
1042                 goto nla_put_failure;
1043
1044         msg_head = genlmsg_put(skb, 0, 0, &hwsim_genl_family, 0,
1045                                HWSIM_CMD_FRAME);
1046         if (msg_head == NULL) {
1047                 printk(KERN_DEBUG "mac80211_hwsim: problem with msg_head\n");
1048                 goto nla_put_failure;
1049         }
1050
1051         if (nla_put(skb, HWSIM_ATTR_ADDR_TRANSMITTER,
1052                     ETH_ALEN, data->addresses[1].addr))
1053                 goto nla_put_failure;
1054
1055         /* We get the skb->data */
1056         if (nla_put(skb, HWSIM_ATTR_FRAME, my_skb->len, my_skb->data))
1057                 goto nla_put_failure;
1058
1059         /* We get the flags for this transmission, and we translate them to
1060            wmediumd flags  */
1061
1062         if (info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS)
1063                 hwsim_flags |= HWSIM_TX_CTL_REQ_TX_STATUS;
1064
1065         if (info->flags & IEEE80211_TX_CTL_NO_ACK)
1066                 hwsim_flags |= HWSIM_TX_CTL_NO_ACK;
1067
1068         if (nla_put_u32(skb, HWSIM_ATTR_FLAGS, hwsim_flags))
1069                 goto nla_put_failure;
1070
1071         if (nla_put_u32(skb, HWSIM_ATTR_FREQ, data->channel->center_freq))
1072                 goto nla_put_failure;
1073
1074         /* We get the tx control (rate and retries) info*/
1075
1076         for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
1077                 tx_attempts[i].idx = info->status.rates[i].idx;
1078                 tx_attempts[i].count = info->status.rates[i].count;
1079         }
1080
1081         if (nla_put(skb, HWSIM_ATTR_TX_INFO,
1082                     sizeof(struct hwsim_tx_rate)*IEEE80211_TX_MAX_RATES,
1083                     tx_attempts))
1084                 goto nla_put_failure;
1085
1086         /* We create a cookie to identify this skb */
1087         data->pending_cookie++;
1088         cookie = data->pending_cookie;
1089         info->rate_driver_data[0] = (void *)cookie;
1090         if (nla_put_u64_64bit(skb, HWSIM_ATTR_COOKIE, cookie, HWSIM_ATTR_PAD))
1091                 goto nla_put_failure;
1092
1093         genlmsg_end(skb, msg_head);
1094         if (hwsim_unicast_netgroup(data, skb, dst_portid))
1095                 goto err_free_txskb;
1096
1097         /* Enqueue the packet */
1098         skb_queue_tail(&data->pending, my_skb);
1099         data->tx_pkts++;
1100         data->tx_bytes += my_skb->len;
1101         return;
1102
1103 nla_put_failure:
1104         nlmsg_free(skb);
1105 err_free_txskb:
1106         printk(KERN_DEBUG "mac80211_hwsim: error occurred in %s\n", __func__);
1107         ieee80211_free_txskb(hw, my_skb);
1108         data->tx_failed++;
1109 }
1110
1111 static bool hwsim_chans_compat(struct ieee80211_channel *c1,
1112                                struct ieee80211_channel *c2)
1113 {
1114         if (!c1 || !c2)
1115                 return false;
1116
1117         return c1->center_freq == c2->center_freq;
1118 }
1119
1120 struct tx_iter_data {
1121         struct ieee80211_channel *channel;
1122         bool receive;
1123 };
1124
1125 static void mac80211_hwsim_tx_iter(void *_data, u8 *addr,
1126                                    struct ieee80211_vif *vif)
1127 {
1128         struct tx_iter_data *data = _data;
1129
1130         if (!vif->chanctx_conf)
1131                 return;
1132
1133         if (!hwsim_chans_compat(data->channel,
1134                                 rcu_dereference(vif->chanctx_conf)->def.chan))
1135                 return;
1136
1137         data->receive = true;
1138 }
1139
1140 static void mac80211_hwsim_add_vendor_rtap(struct sk_buff *skb)
1141 {
1142         /*
1143          * To enable this code, #define the HWSIM_RADIOTAP_OUI,
1144          * e.g. like this:
1145          * #define HWSIM_RADIOTAP_OUI "\x02\x00\x00"
1146          * (but you should use a valid OUI, not that)
1147          *
1148          * If anyone wants to 'donate' a radiotap OUI/subns code
1149          * please send a patch removing this #ifdef and changing
1150          * the values accordingly.
1151          */
1152 #ifdef HWSIM_RADIOTAP_OUI
1153         struct ieee80211_vendor_radiotap *rtap;
1154
1155         /*
1156          * Note that this code requires the headroom in the SKB
1157          * that was allocated earlier.
1158          */
1159         rtap = skb_push(skb, sizeof(*rtap) + 8 + 4);
1160         rtap->oui[0] = HWSIM_RADIOTAP_OUI[0];
1161         rtap->oui[1] = HWSIM_RADIOTAP_OUI[1];
1162         rtap->oui[2] = HWSIM_RADIOTAP_OUI[2];
1163         rtap->subns = 127;
1164
1165         /*
1166          * Radiotap vendor namespaces can (and should) also be
1167          * split into fields by using the standard radiotap
1168          * presence bitmap mechanism. Use just BIT(0) here for
1169          * the presence bitmap.
1170          */
1171         rtap->present = BIT(0);
1172         /* We have 8 bytes of (dummy) data */
1173         rtap->len = 8;
1174         /* For testing, also require it to be aligned */
1175         rtap->align = 8;
1176         /* And also test that padding works, 4 bytes */
1177         rtap->pad = 4;
1178         /* push the data */
1179         memcpy(rtap->data, "ABCDEFGH", 8);
1180         /* make sure to clear padding, mac80211 doesn't */
1181         memset(rtap->data + 8, 0, 4);
1182
1183         IEEE80211_SKB_RXCB(skb)->flag |= RX_FLAG_RADIOTAP_VENDOR_DATA;
1184 #endif
1185 }
1186
1187 static bool mac80211_hwsim_tx_frame_no_nl(struct ieee80211_hw *hw,
1188                                           struct sk_buff *skb,
1189                                           struct ieee80211_channel *chan)
1190 {
1191         struct mac80211_hwsim_data *data = hw->priv, *data2;
1192         bool ack = false;
1193         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1194         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1195         struct ieee80211_rx_status rx_status;
1196         u64 now;
1197
1198         memset(&rx_status, 0, sizeof(rx_status));
1199         rx_status.flag |= RX_FLAG_MACTIME_START;
1200         rx_status.freq = chan->center_freq;
1201         rx_status.band = chan->band;
1202         if (info->control.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) {
1203                 rx_status.rate_idx =
1204                         ieee80211_rate_get_vht_mcs(&info->control.rates[0]);
1205                 rx_status.nss =
1206                         ieee80211_rate_get_vht_nss(&info->control.rates[0]);
1207                 rx_status.encoding = RX_ENC_VHT;
1208         } else {
1209                 rx_status.rate_idx = info->control.rates[0].idx;
1210                 if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS)
1211                         rx_status.encoding = RX_ENC_HT;
1212         }
1213         if (info->control.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
1214                 rx_status.bw = RATE_INFO_BW_40;
1215         else if (info->control.rates[0].flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
1216                 rx_status.bw = RATE_INFO_BW_80;
1217         else if (info->control.rates[0].flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
1218                 rx_status.bw = RATE_INFO_BW_160;
1219         else
1220                 rx_status.bw = RATE_INFO_BW_20;
1221         if (info->control.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
1222                 rx_status.enc_flags |= RX_ENC_FLAG_SHORT_GI;
1223         /* TODO: simulate real signal strength (and optional packet loss) */
1224         rx_status.signal = -50;
1225         if (info->control.vif)
1226                 rx_status.signal += info->control.vif->bss_conf.txpower;
1227
1228         if (data->ps != PS_DISABLED)
1229                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1230
1231         /* release the skb's source info */
1232         skb_orphan(skb);
1233         skb_dst_drop(skb);
1234         skb->mark = 0;
1235         secpath_reset(skb);
1236         nf_reset(skb);
1237
1238         /*
1239          * Get absolute mactime here so all HWs RX at the "same time", and
1240          * absolute TX time for beacon mactime so the timestamp matches.
1241          * Giving beacons a different mactime than non-beacons looks messy, but
1242          * it helps the Toffset be exact and a ~10us mactime discrepancy
1243          * probably doesn't really matter.
1244          */
1245         if (ieee80211_is_beacon(hdr->frame_control) ||
1246             ieee80211_is_probe_resp(hdr->frame_control))
1247                 now = data->abs_bcn_ts;
1248         else
1249                 now = mac80211_hwsim_get_tsf_raw();
1250
1251         /* Copy skb to all enabled radios that are on the current frequency */
1252         spin_lock(&hwsim_radio_lock);
1253         list_for_each_entry(data2, &hwsim_radios, list) {
1254                 struct sk_buff *nskb;
1255                 struct tx_iter_data tx_iter_data = {
1256                         .receive = false,
1257                         .channel = chan,
1258                 };
1259
1260                 if (data == data2)
1261                         continue;
1262
1263                 if (!data2->started || (data2->idle && !data2->tmp_chan) ||
1264                     !hwsim_ps_rx_ok(data2, skb))
1265                         continue;
1266
1267                 if (!(data->group & data2->group))
1268                         continue;
1269
1270                 if (data->netgroup != data2->netgroup)
1271                         continue;
1272
1273                 if (!hwsim_chans_compat(chan, data2->tmp_chan) &&
1274                     !hwsim_chans_compat(chan, data2->channel)) {
1275                         ieee80211_iterate_active_interfaces_atomic(
1276                                 data2->hw, IEEE80211_IFACE_ITER_NORMAL,
1277                                 mac80211_hwsim_tx_iter, &tx_iter_data);
1278                         if (!tx_iter_data.receive)
1279                                 continue;
1280                 }
1281
1282                 /*
1283                  * reserve some space for our vendor and the normal
1284                  * radiotap header, since we're copying anyway
1285                  */
1286                 if (skb->len < PAGE_SIZE && paged_rx) {
1287                         struct page *page = alloc_page(GFP_ATOMIC);
1288
1289                         if (!page)
1290                                 continue;
1291
1292                         nskb = dev_alloc_skb(128);
1293                         if (!nskb) {
1294                                 __free_page(page);
1295                                 continue;
1296                         }
1297
1298                         memcpy(page_address(page), skb->data, skb->len);
1299                         skb_add_rx_frag(nskb, 0, page, 0, skb->len, skb->len);
1300                 } else {
1301                         nskb = skb_copy(skb, GFP_ATOMIC);
1302                         if (!nskb)
1303                                 continue;
1304                 }
1305
1306                 if (mac80211_hwsim_addr_match(data2, hdr->addr1))
1307                         ack = true;
1308
1309                 rx_status.mactime = now + data2->tsf_offset;
1310
1311                 memcpy(IEEE80211_SKB_RXCB(nskb), &rx_status, sizeof(rx_status));
1312
1313                 mac80211_hwsim_add_vendor_rtap(nskb);
1314
1315                 data2->rx_pkts++;
1316                 data2->rx_bytes += nskb->len;
1317                 ieee80211_rx_irqsafe(data2->hw, nskb);
1318         }
1319         spin_unlock(&hwsim_radio_lock);
1320
1321         return ack;
1322 }
1323
1324 static void mac80211_hwsim_tx(struct ieee80211_hw *hw,
1325                               struct ieee80211_tx_control *control,
1326                               struct sk_buff *skb)
1327 {
1328         struct mac80211_hwsim_data *data = hw->priv;
1329         struct ieee80211_tx_info *txi = IEEE80211_SKB_CB(skb);
1330         struct ieee80211_hdr *hdr = (void *)skb->data;
1331         struct ieee80211_chanctx_conf *chanctx_conf;
1332         struct ieee80211_channel *channel;
1333         bool ack;
1334         u32 _portid;
1335
1336         if (WARN_ON(skb->len < 10)) {
1337                 /* Should not happen; just a sanity check for addr1 use */
1338                 ieee80211_free_txskb(hw, skb);
1339                 return;
1340         }
1341
1342         if (!data->use_chanctx) {
1343                 channel = data->channel;
1344         } else if (txi->hw_queue == 4) {
1345                 channel = data->tmp_chan;
1346         } else {
1347                 chanctx_conf = rcu_dereference(txi->control.vif->chanctx_conf);
1348                 if (chanctx_conf)
1349                         channel = chanctx_conf->def.chan;
1350                 else
1351                         channel = NULL;
1352         }
1353
1354         if (WARN(!channel, "TX w/o channel - queue = %d\n", txi->hw_queue)) {
1355                 ieee80211_free_txskb(hw, skb);
1356                 return;
1357         }
1358
1359         if (data->idle && !data->tmp_chan) {
1360                 wiphy_debug(hw->wiphy, "Trying to TX when idle - reject\n");
1361                 ieee80211_free_txskb(hw, skb);
1362                 return;
1363         }
1364
1365         if (txi->control.vif)
1366                 hwsim_check_magic(txi->control.vif);
1367         if (control->sta)
1368                 hwsim_check_sta_magic(control->sta);
1369
1370         if (ieee80211_hw_check(hw, SUPPORTS_RC_TABLE))
1371                 ieee80211_get_tx_rates(txi->control.vif, control->sta, skb,
1372                                        txi->control.rates,
1373                                        ARRAY_SIZE(txi->control.rates));
1374
1375         if (skb->len >= 24 + 8 &&
1376             ieee80211_is_probe_resp(hdr->frame_control)) {
1377                 /* fake header transmission time */
1378                 struct ieee80211_mgmt *mgmt;
1379                 struct ieee80211_rate *txrate;
1380                 u64 ts;
1381
1382                 mgmt = (struct ieee80211_mgmt *)skb->data;
1383                 txrate = ieee80211_get_tx_rate(hw, txi);
1384                 ts = mac80211_hwsim_get_tsf_raw();
1385                 mgmt->u.probe_resp.timestamp =
1386                         cpu_to_le64(ts + data->tsf_offset +
1387                                     24 * 8 * 10 / txrate->bitrate);
1388         }
1389
1390         mac80211_hwsim_monitor_rx(hw, skb, channel);
1391
1392         /* wmediumd mode check */
1393         _portid = ACCESS_ONCE(data->wmediumd);
1394
1395         if (_portid)
1396                 return mac80211_hwsim_tx_frame_nl(hw, skb, _portid);
1397
1398         /* NO wmediumd detected, perfect medium simulation */
1399         data->tx_pkts++;
1400         data->tx_bytes += skb->len;
1401         ack = mac80211_hwsim_tx_frame_no_nl(hw, skb, channel);
1402
1403         if (ack && skb->len >= 16)
1404                 mac80211_hwsim_monitor_ack(channel, hdr->addr2);
1405
1406         ieee80211_tx_info_clear_status(txi);
1407
1408         /* frame was transmitted at most favorable rate at first attempt */
1409         txi->control.rates[0].count = 1;
1410         txi->control.rates[1].idx = -1;
1411
1412         if (!(txi->flags & IEEE80211_TX_CTL_NO_ACK) && ack)
1413                 txi->flags |= IEEE80211_TX_STAT_ACK;
1414         ieee80211_tx_status_irqsafe(hw, skb);
1415 }
1416
1417
1418 static int mac80211_hwsim_start(struct ieee80211_hw *hw)
1419 {
1420         struct mac80211_hwsim_data *data = hw->priv;
1421         wiphy_debug(hw->wiphy, "%s\n", __func__);
1422         data->started = true;
1423         return 0;
1424 }
1425
1426
1427 static void mac80211_hwsim_stop(struct ieee80211_hw *hw)
1428 {
1429         struct mac80211_hwsim_data *data = hw->priv;
1430         data->started = false;
1431         tasklet_hrtimer_cancel(&data->beacon_timer);
1432         wiphy_debug(hw->wiphy, "%s\n", __func__);
1433 }
1434
1435
1436 static int mac80211_hwsim_add_interface(struct ieee80211_hw *hw,
1437                                         struct ieee80211_vif *vif)
1438 {
1439         wiphy_debug(hw->wiphy, "%s (type=%d mac_addr=%pM)\n",
1440                     __func__, ieee80211_vif_type_p2p(vif),
1441                     vif->addr);
1442         hwsim_set_magic(vif);
1443
1444         vif->cab_queue = 0;
1445         vif->hw_queue[IEEE80211_AC_VO] = 0;
1446         vif->hw_queue[IEEE80211_AC_VI] = 1;
1447         vif->hw_queue[IEEE80211_AC_BE] = 2;
1448         vif->hw_queue[IEEE80211_AC_BK] = 3;
1449
1450         return 0;
1451 }
1452
1453
1454 static int mac80211_hwsim_change_interface(struct ieee80211_hw *hw,
1455                                            struct ieee80211_vif *vif,
1456                                            enum nl80211_iftype newtype,
1457                                            bool newp2p)
1458 {
1459         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1460         wiphy_debug(hw->wiphy,
1461                     "%s (old type=%d, new type=%d, mac_addr=%pM)\n",
1462                     __func__, ieee80211_vif_type_p2p(vif),
1463                     newtype, vif->addr);
1464         hwsim_check_magic(vif);
1465
1466         /*
1467          * interface may change from non-AP to AP in
1468          * which case this needs to be set up again
1469          */
1470         vif->cab_queue = 0;
1471
1472         return 0;
1473 }
1474
1475 static void mac80211_hwsim_remove_interface(
1476         struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1477 {
1478         wiphy_debug(hw->wiphy, "%s (type=%d mac_addr=%pM)\n",
1479                     __func__, ieee80211_vif_type_p2p(vif),
1480                     vif->addr);
1481         hwsim_check_magic(vif);
1482         hwsim_clear_magic(vif);
1483 }
1484
1485 static void mac80211_hwsim_tx_frame(struct ieee80211_hw *hw,
1486                                     struct sk_buff *skb,
1487                                     struct ieee80211_channel *chan)
1488 {
1489         struct mac80211_hwsim_data *data = hw->priv;
1490         u32 _pid = ACCESS_ONCE(data->wmediumd);
1491
1492         if (ieee80211_hw_check(hw, SUPPORTS_RC_TABLE)) {
1493                 struct ieee80211_tx_info *txi = IEEE80211_SKB_CB(skb);
1494                 ieee80211_get_tx_rates(txi->control.vif, NULL, skb,
1495                                        txi->control.rates,
1496                                        ARRAY_SIZE(txi->control.rates));
1497         }
1498
1499         mac80211_hwsim_monitor_rx(hw, skb, chan);
1500
1501         if (_pid)
1502                 return mac80211_hwsim_tx_frame_nl(hw, skb, _pid);
1503
1504         mac80211_hwsim_tx_frame_no_nl(hw, skb, chan);
1505         dev_kfree_skb(skb);
1506 }
1507
1508 static void mac80211_hwsim_beacon_tx(void *arg, u8 *mac,
1509                                      struct ieee80211_vif *vif)
1510 {
1511         struct mac80211_hwsim_data *data = arg;
1512         struct ieee80211_hw *hw = data->hw;
1513         struct ieee80211_tx_info *info;
1514         struct ieee80211_rate *txrate;
1515         struct ieee80211_mgmt *mgmt;
1516         struct sk_buff *skb;
1517
1518         hwsim_check_magic(vif);
1519
1520         if (vif->type != NL80211_IFTYPE_AP &&
1521             vif->type != NL80211_IFTYPE_MESH_POINT &&
1522             vif->type != NL80211_IFTYPE_ADHOC)
1523                 return;
1524
1525         skb = ieee80211_beacon_get(hw, vif);
1526         if (skb == NULL)
1527                 return;
1528         info = IEEE80211_SKB_CB(skb);
1529         if (ieee80211_hw_check(hw, SUPPORTS_RC_TABLE))
1530                 ieee80211_get_tx_rates(vif, NULL, skb,
1531                                        info->control.rates,
1532                                        ARRAY_SIZE(info->control.rates));
1533
1534         txrate = ieee80211_get_tx_rate(hw, info);
1535
1536         mgmt = (struct ieee80211_mgmt *) skb->data;
1537         /* fake header transmission time */
1538         data->abs_bcn_ts = mac80211_hwsim_get_tsf_raw();
1539         mgmt->u.beacon.timestamp = cpu_to_le64(data->abs_bcn_ts +
1540                                                data->tsf_offset +
1541                                                24 * 8 * 10 / txrate->bitrate);
1542
1543         mac80211_hwsim_tx_frame(hw, skb,
1544                                 rcu_dereference(vif->chanctx_conf)->def.chan);
1545
1546         if (vif->csa_active && ieee80211_csa_is_complete(vif))
1547                 ieee80211_csa_finish(vif);
1548 }
1549
1550 static enum hrtimer_restart
1551 mac80211_hwsim_beacon(struct hrtimer *timer)
1552 {
1553         struct mac80211_hwsim_data *data =
1554                 container_of(timer, struct mac80211_hwsim_data,
1555                              beacon_timer.timer);
1556         struct ieee80211_hw *hw = data->hw;
1557         u64 bcn_int = data->beacon_int;
1558         ktime_t next_bcn;
1559
1560         if (!data->started)
1561                 goto out;
1562
1563         ieee80211_iterate_active_interfaces_atomic(
1564                 hw, IEEE80211_IFACE_ITER_NORMAL,
1565                 mac80211_hwsim_beacon_tx, data);
1566
1567         /* beacon at new TBTT + beacon interval */
1568         if (data->bcn_delta) {
1569                 bcn_int -= data->bcn_delta;
1570                 data->bcn_delta = 0;
1571         }
1572
1573         next_bcn = ktime_add(hrtimer_get_expires(timer),
1574                              ns_to_ktime(bcn_int * 1000));
1575         tasklet_hrtimer_start(&data->beacon_timer, next_bcn, HRTIMER_MODE_ABS);
1576 out:
1577         return HRTIMER_NORESTART;
1578 }
1579
1580 static const char * const hwsim_chanwidths[] = {
1581         [NL80211_CHAN_WIDTH_20_NOHT] = "noht",
1582         [NL80211_CHAN_WIDTH_20] = "ht20",
1583         [NL80211_CHAN_WIDTH_40] = "ht40",
1584         [NL80211_CHAN_WIDTH_80] = "vht80",
1585         [NL80211_CHAN_WIDTH_80P80] = "vht80p80",
1586         [NL80211_CHAN_WIDTH_160] = "vht160",
1587 };
1588
1589 static int mac80211_hwsim_config(struct ieee80211_hw *hw, u32 changed)
1590 {
1591         struct mac80211_hwsim_data *data = hw->priv;
1592         struct ieee80211_conf *conf = &hw->conf;
1593         static const char *smps_modes[IEEE80211_SMPS_NUM_MODES] = {
1594                 [IEEE80211_SMPS_AUTOMATIC] = "auto",
1595                 [IEEE80211_SMPS_OFF] = "off",
1596                 [IEEE80211_SMPS_STATIC] = "static",
1597                 [IEEE80211_SMPS_DYNAMIC] = "dynamic",
1598         };
1599         int idx;
1600
1601         if (conf->chandef.chan)
1602                 wiphy_debug(hw->wiphy,
1603                             "%s (freq=%d(%d - %d)/%s idle=%d ps=%d smps=%s)\n",
1604                             __func__,
1605                             conf->chandef.chan->center_freq,
1606                             conf->chandef.center_freq1,
1607                             conf->chandef.center_freq2,
1608                             hwsim_chanwidths[conf->chandef.width],
1609                             !!(conf->flags & IEEE80211_CONF_IDLE),
1610                             !!(conf->flags & IEEE80211_CONF_PS),
1611                             smps_modes[conf->smps_mode]);
1612         else
1613                 wiphy_debug(hw->wiphy,
1614                             "%s (freq=0 idle=%d ps=%d smps=%s)\n",
1615                             __func__,
1616                             !!(conf->flags & IEEE80211_CONF_IDLE),
1617                             !!(conf->flags & IEEE80211_CONF_PS),
1618                             smps_modes[conf->smps_mode]);
1619
1620         data->idle = !!(conf->flags & IEEE80211_CONF_IDLE);
1621
1622         WARN_ON(conf->chandef.chan && data->use_chanctx);
1623
1624         mutex_lock(&data->mutex);
1625         if (data->scanning && conf->chandef.chan) {
1626                 for (idx = 0; idx < ARRAY_SIZE(data->survey_data); idx++) {
1627                         if (data->survey_data[idx].channel == data->channel) {
1628                                 data->survey_data[idx].start =
1629                                         data->survey_data[idx].next_start;
1630                                 data->survey_data[idx].end = jiffies;
1631                                 break;
1632                         }
1633                 }
1634
1635                 data->channel = conf->chandef.chan;
1636
1637                 for (idx = 0; idx < ARRAY_SIZE(data->survey_data); idx++) {
1638                         if (data->survey_data[idx].channel &&
1639                             data->survey_data[idx].channel != data->channel)
1640                                 continue;
1641                         data->survey_data[idx].channel = data->channel;
1642                         data->survey_data[idx].next_start = jiffies;
1643                         break;
1644                 }
1645         } else {
1646                 data->channel = conf->chandef.chan;
1647         }
1648         mutex_unlock(&data->mutex);
1649
1650         if (!data->started || !data->beacon_int)
1651                 tasklet_hrtimer_cancel(&data->beacon_timer);
1652         else if (!hrtimer_is_queued(&data->beacon_timer.timer)) {
1653                 u64 tsf = mac80211_hwsim_get_tsf(hw, NULL);
1654                 u32 bcn_int = data->beacon_int;
1655                 u64 until_tbtt = bcn_int - do_div(tsf, bcn_int);
1656
1657                 tasklet_hrtimer_start(&data->beacon_timer,
1658                                       ns_to_ktime(until_tbtt * 1000),
1659                                       HRTIMER_MODE_REL);
1660         }
1661
1662         return 0;
1663 }
1664
1665
1666 static void mac80211_hwsim_configure_filter(struct ieee80211_hw *hw,
1667                                             unsigned int changed_flags,
1668                                             unsigned int *total_flags,u64 multicast)
1669 {
1670         struct mac80211_hwsim_data *data = hw->priv;
1671
1672         wiphy_debug(hw->wiphy, "%s\n", __func__);
1673
1674         data->rx_filter = 0;
1675         if (*total_flags & FIF_ALLMULTI)
1676                 data->rx_filter |= FIF_ALLMULTI;
1677
1678         *total_flags = data->rx_filter;
1679 }
1680
1681 static void mac80211_hwsim_bcn_en_iter(void *data, u8 *mac,
1682                                        struct ieee80211_vif *vif)
1683 {
1684         unsigned int *count = data;
1685         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
1686
1687         if (vp->bcn_en)
1688                 (*count)++;
1689 }
1690
1691 static void mac80211_hwsim_bss_info_changed(struct ieee80211_hw *hw,
1692                                             struct ieee80211_vif *vif,
1693                                             struct ieee80211_bss_conf *info,
1694                                             u32 changed)
1695 {
1696         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
1697         struct mac80211_hwsim_data *data = hw->priv;
1698
1699         hwsim_check_magic(vif);
1700
1701         wiphy_debug(hw->wiphy, "%s(changed=0x%x vif->addr=%pM)\n",
1702                     __func__, changed, vif->addr);
1703
1704         if (changed & BSS_CHANGED_BSSID) {
1705                 wiphy_debug(hw->wiphy, "%s: BSSID changed: %pM\n",
1706                             __func__, info->bssid);
1707                 memcpy(vp->bssid, info->bssid, ETH_ALEN);
1708         }
1709
1710         if (changed & BSS_CHANGED_ASSOC) {
1711                 wiphy_debug(hw->wiphy, "  ASSOC: assoc=%d aid=%d\n",
1712                             info->assoc, info->aid);
1713                 vp->assoc = info->assoc;
1714                 vp->aid = info->aid;
1715         }
1716
1717         if (changed & BSS_CHANGED_BEACON_ENABLED) {
1718                 wiphy_debug(hw->wiphy, "  BCN EN: %d (BI=%u)\n",
1719                             info->enable_beacon, info->beacon_int);
1720                 vp->bcn_en = info->enable_beacon;
1721                 if (data->started &&
1722                     !hrtimer_is_queued(&data->beacon_timer.timer) &&
1723                     info->enable_beacon) {
1724                         u64 tsf, until_tbtt;
1725                         u32 bcn_int;
1726                         data->beacon_int = info->beacon_int * 1024;
1727                         tsf = mac80211_hwsim_get_tsf(hw, vif);
1728                         bcn_int = data->beacon_int;
1729                         until_tbtt = bcn_int - do_div(tsf, bcn_int);
1730                         tasklet_hrtimer_start(&data->beacon_timer,
1731                                               ns_to_ktime(until_tbtt * 1000),
1732                                               HRTIMER_MODE_REL);
1733                 } else if (!info->enable_beacon) {
1734                         unsigned int count = 0;
1735                         ieee80211_iterate_active_interfaces_atomic(
1736                                 data->hw, IEEE80211_IFACE_ITER_NORMAL,
1737                                 mac80211_hwsim_bcn_en_iter, &count);
1738                         wiphy_debug(hw->wiphy, "  beaconing vifs remaining: %u",
1739                                     count);
1740                         if (count == 0) {
1741                                 tasklet_hrtimer_cancel(&data->beacon_timer);
1742                                 data->beacon_int = 0;
1743                         }
1744                 }
1745         }
1746
1747         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1748                 wiphy_debug(hw->wiphy, "  ERP_CTS_PROT: %d\n",
1749                             info->use_cts_prot);
1750         }
1751
1752         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1753                 wiphy_debug(hw->wiphy, "  ERP_PREAMBLE: %d\n",
1754                             info->use_short_preamble);
1755         }
1756
1757         if (changed & BSS_CHANGED_ERP_SLOT) {
1758                 wiphy_debug(hw->wiphy, "  ERP_SLOT: %d\n", info->use_short_slot);
1759         }
1760
1761         if (changed & BSS_CHANGED_HT) {
1762                 wiphy_debug(hw->wiphy, "  HT: op_mode=0x%x\n",
1763                             info->ht_operation_mode);
1764         }
1765
1766         if (changed & BSS_CHANGED_BASIC_RATES) {
1767                 wiphy_debug(hw->wiphy, "  BASIC_RATES: 0x%llx\n",
1768                             (unsigned long long) info->basic_rates);
1769         }
1770
1771         if (changed & BSS_CHANGED_TXPOWER)
1772                 wiphy_debug(hw->wiphy, "  TX Power: %d dBm\n", info->txpower);
1773 }
1774
1775 static int mac80211_hwsim_sta_add(struct ieee80211_hw *hw,
1776                                   struct ieee80211_vif *vif,
1777                                   struct ieee80211_sta *sta)
1778 {
1779         hwsim_check_magic(vif);
1780         hwsim_set_sta_magic(sta);
1781
1782         return 0;
1783 }
1784
1785 static int mac80211_hwsim_sta_remove(struct ieee80211_hw *hw,
1786                                      struct ieee80211_vif *vif,
1787                                      struct ieee80211_sta *sta)
1788 {
1789         hwsim_check_magic(vif);
1790         hwsim_clear_sta_magic(sta);
1791
1792         return 0;
1793 }
1794
1795 static void mac80211_hwsim_sta_notify(struct ieee80211_hw *hw,
1796                                       struct ieee80211_vif *vif,
1797                                       enum sta_notify_cmd cmd,
1798                                       struct ieee80211_sta *sta)
1799 {
1800         hwsim_check_magic(vif);
1801
1802         switch (cmd) {
1803         case STA_NOTIFY_SLEEP:
1804         case STA_NOTIFY_AWAKE:
1805                 /* TODO: make good use of these flags */
1806                 break;
1807         default:
1808                 WARN(1, "Invalid sta notify: %d\n", cmd);
1809                 break;
1810         }
1811 }
1812
1813 static int mac80211_hwsim_set_tim(struct ieee80211_hw *hw,
1814                                   struct ieee80211_sta *sta,
1815                                   bool set)
1816 {
1817         hwsim_check_sta_magic(sta);
1818         return 0;
1819 }
1820
1821 static int mac80211_hwsim_conf_tx(
1822         struct ieee80211_hw *hw,
1823         struct ieee80211_vif *vif, u16 queue,
1824         const struct ieee80211_tx_queue_params *params)
1825 {
1826         wiphy_debug(hw->wiphy,
1827                     "%s (queue=%d txop=%d cw_min=%d cw_max=%d aifs=%d)\n",
1828                     __func__, queue,
1829                     params->txop, params->cw_min,
1830                     params->cw_max, params->aifs);
1831         return 0;
1832 }
1833
1834 static int mac80211_hwsim_get_survey(struct ieee80211_hw *hw, int idx,
1835                                      struct survey_info *survey)
1836 {
1837         struct mac80211_hwsim_data *hwsim = hw->priv;
1838
1839         if (idx < 0 || idx >= ARRAY_SIZE(hwsim->survey_data))
1840                 return -ENOENT;
1841
1842         mutex_lock(&hwsim->mutex);
1843         survey->channel = hwsim->survey_data[idx].channel;
1844         if (!survey->channel) {
1845                 mutex_unlock(&hwsim->mutex);
1846                 return -ENOENT;
1847         }
1848
1849         /*
1850          * Magically conjured dummy values --- this is only ok for simulated hardware.
1851          *
1852          * A real driver which cannot determine real values noise MUST NOT
1853          * report any, especially not a magically conjured ones :-)
1854          */
1855         survey->filled = SURVEY_INFO_NOISE_DBM |
1856                          SURVEY_INFO_TIME |
1857                          SURVEY_INFO_TIME_BUSY;
1858         survey->noise = -92;
1859         survey->time =
1860                 jiffies_to_msecs(hwsim->survey_data[idx].end -
1861                                  hwsim->survey_data[idx].start);
1862         /* report 12.5% of channel time is used */
1863         survey->time_busy = survey->time/8;
1864         mutex_unlock(&hwsim->mutex);
1865
1866         return 0;
1867 }
1868
1869 #ifdef CONFIG_NL80211_TESTMODE
1870 /*
1871  * This section contains example code for using netlink
1872  * attributes with the testmode command in nl80211.
1873  */
1874
1875 /* These enums need to be kept in sync with userspace */
1876 enum hwsim_testmode_attr {
1877         __HWSIM_TM_ATTR_INVALID = 0,
1878         HWSIM_TM_ATTR_CMD       = 1,
1879         HWSIM_TM_ATTR_PS        = 2,
1880
1881         /* keep last */
1882         __HWSIM_TM_ATTR_AFTER_LAST,
1883         HWSIM_TM_ATTR_MAX       = __HWSIM_TM_ATTR_AFTER_LAST - 1
1884 };
1885
1886 enum hwsim_testmode_cmd {
1887         HWSIM_TM_CMD_SET_PS             = 0,
1888         HWSIM_TM_CMD_GET_PS             = 1,
1889         HWSIM_TM_CMD_STOP_QUEUES        = 2,
1890         HWSIM_TM_CMD_WAKE_QUEUES        = 3,
1891 };
1892
1893 static const struct nla_policy hwsim_testmode_policy[HWSIM_TM_ATTR_MAX + 1] = {
1894         [HWSIM_TM_ATTR_CMD] = { .type = NLA_U32 },
1895         [HWSIM_TM_ATTR_PS] = { .type = NLA_U32 },
1896 };
1897
1898 static int mac80211_hwsim_testmode_cmd(struct ieee80211_hw *hw,
1899                                        struct ieee80211_vif *vif,
1900                                        void *data, int len)
1901 {
1902         struct mac80211_hwsim_data *hwsim = hw->priv;
1903         struct nlattr *tb[HWSIM_TM_ATTR_MAX + 1];
1904         struct sk_buff *skb;
1905         int err, ps;
1906
1907         err = nla_parse(tb, HWSIM_TM_ATTR_MAX, data, len,
1908                         hwsim_testmode_policy, NULL);
1909         if (err)
1910                 return err;
1911
1912         if (!tb[HWSIM_TM_ATTR_CMD])
1913                 return -EINVAL;
1914
1915         switch (nla_get_u32(tb[HWSIM_TM_ATTR_CMD])) {
1916         case HWSIM_TM_CMD_SET_PS:
1917                 if (!tb[HWSIM_TM_ATTR_PS])
1918                         return -EINVAL;
1919                 ps = nla_get_u32(tb[HWSIM_TM_ATTR_PS]);
1920                 return hwsim_fops_ps_write(hwsim, ps);
1921         case HWSIM_TM_CMD_GET_PS:
1922                 skb = cfg80211_testmode_alloc_reply_skb(hw->wiphy,
1923                                                 nla_total_size(sizeof(u32)));
1924                 if (!skb)
1925                         return -ENOMEM;
1926                 if (nla_put_u32(skb, HWSIM_TM_ATTR_PS, hwsim->ps))
1927                         goto nla_put_failure;
1928                 return cfg80211_testmode_reply(skb);
1929         case HWSIM_TM_CMD_STOP_QUEUES:
1930                 ieee80211_stop_queues(hw);
1931                 return 0;
1932         case HWSIM_TM_CMD_WAKE_QUEUES:
1933                 ieee80211_wake_queues(hw);
1934                 return 0;
1935         default:
1936                 return -EOPNOTSUPP;
1937         }
1938
1939  nla_put_failure:
1940         kfree_skb(skb);
1941         return -ENOBUFS;
1942 }
1943 #endif
1944
1945 static int mac80211_hwsim_ampdu_action(struct ieee80211_hw *hw,
1946                                        struct ieee80211_vif *vif,
1947                                        struct ieee80211_ampdu_params *params)
1948 {
1949         struct ieee80211_sta *sta = params->sta;
1950         enum ieee80211_ampdu_mlme_action action = params->action;
1951         u16 tid = params->tid;
1952
1953         switch (action) {
1954         case IEEE80211_AMPDU_TX_START:
1955                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1956                 break;
1957         case IEEE80211_AMPDU_TX_STOP_CONT:
1958         case IEEE80211_AMPDU_TX_STOP_FLUSH:
1959         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
1960                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1961                 break;
1962         case IEEE80211_AMPDU_TX_OPERATIONAL:
1963                 break;
1964         case IEEE80211_AMPDU_RX_START:
1965         case IEEE80211_AMPDU_RX_STOP:
1966                 break;
1967         default:
1968                 return -EOPNOTSUPP;
1969         }
1970
1971         return 0;
1972 }
1973
1974 static void mac80211_hwsim_flush(struct ieee80211_hw *hw,
1975                                  struct ieee80211_vif *vif,
1976                                  u32 queues, bool drop)
1977 {
1978         /* Not implemented, queues only on kernel side */
1979 }
1980
1981 static void hw_scan_work(struct work_struct *work)
1982 {
1983         struct mac80211_hwsim_data *hwsim =
1984                 container_of(work, struct mac80211_hwsim_data, hw_scan.work);
1985         struct cfg80211_scan_request *req = hwsim->hw_scan_request;
1986         int dwell, i;
1987
1988         mutex_lock(&hwsim->mutex);
1989         if (hwsim->scan_chan_idx >= req->n_channels) {
1990                 struct cfg80211_scan_info info = {
1991                         .aborted = false,
1992                 };
1993
1994                 wiphy_debug(hwsim->hw->wiphy, "hw scan complete\n");
1995                 ieee80211_scan_completed(hwsim->hw, &info);
1996                 hwsim->hw_scan_request = NULL;
1997                 hwsim->hw_scan_vif = NULL;
1998                 hwsim->tmp_chan = NULL;
1999                 mutex_unlock(&hwsim->mutex);
2000                 return;
2001         }
2002
2003         wiphy_debug(hwsim->hw->wiphy, "hw scan %d MHz\n",
2004                     req->channels[hwsim->scan_chan_idx]->center_freq);
2005
2006         hwsim->tmp_chan = req->channels[hwsim->scan_chan_idx];
2007         if (hwsim->tmp_chan->flags & (IEEE80211_CHAN_NO_IR |
2008                                       IEEE80211_CHAN_RADAR) ||
2009             !req->n_ssids) {
2010                 dwell = 120;
2011         } else {
2012                 dwell = 30;
2013                 /* send probes */
2014                 for (i = 0; i < req->n_ssids; i++) {
2015                         struct sk_buff *probe;
2016                         struct ieee80211_mgmt *mgmt;
2017
2018                         probe = ieee80211_probereq_get(hwsim->hw,
2019                                                        hwsim->scan_addr,
2020                                                        req->ssids[i].ssid,
2021                                                        req->ssids[i].ssid_len,
2022                                                        req->ie_len);
2023                         if (!probe)
2024                                 continue;
2025
2026                         mgmt = (struct ieee80211_mgmt *) probe->data;
2027                         memcpy(mgmt->da, req->bssid, ETH_ALEN);
2028                         memcpy(mgmt->bssid, req->bssid, ETH_ALEN);
2029
2030                         if (req->ie_len)
2031                                 skb_put_data(probe, req->ie, req->ie_len);
2032
2033                         rcu_read_lock();
2034                         if (!ieee80211_tx_prepare_skb(hwsim->hw,
2035                                                       hwsim->hw_scan_vif,
2036                                                       probe,
2037                                                       hwsim->tmp_chan->band,
2038                                                       NULL)) {
2039                                 rcu_read_unlock();
2040                                 kfree_skb(probe);
2041                                 continue;
2042                         }
2043
2044                         local_bh_disable();
2045                         mac80211_hwsim_tx_frame(hwsim->hw, probe,
2046                                                 hwsim->tmp_chan);
2047                         rcu_read_unlock();
2048                         local_bh_enable();
2049                 }
2050         }
2051         ieee80211_queue_delayed_work(hwsim->hw, &hwsim->hw_scan,
2052                                      msecs_to_jiffies(dwell));
2053         hwsim->survey_data[hwsim->scan_chan_idx].channel = hwsim->tmp_chan;
2054         hwsim->survey_data[hwsim->scan_chan_idx].start = jiffies;
2055         hwsim->survey_data[hwsim->scan_chan_idx].end =
2056                 jiffies + msecs_to_jiffies(dwell);
2057         hwsim->scan_chan_idx++;
2058         mutex_unlock(&hwsim->mutex);
2059 }
2060
2061 static int mac80211_hwsim_hw_scan(struct ieee80211_hw *hw,
2062                                   struct ieee80211_vif *vif,
2063                                   struct ieee80211_scan_request *hw_req)
2064 {
2065         struct mac80211_hwsim_data *hwsim = hw->priv;
2066         struct cfg80211_scan_request *req = &hw_req->req;
2067
2068         mutex_lock(&hwsim->mutex);
2069         if (WARN_ON(hwsim->tmp_chan || hwsim->hw_scan_request)) {
2070                 mutex_unlock(&hwsim->mutex);
2071                 return -EBUSY;
2072         }
2073         hwsim->hw_scan_request = req;
2074         hwsim->hw_scan_vif = vif;
2075         hwsim->scan_chan_idx = 0;
2076         if (req->flags & NL80211_SCAN_FLAG_RANDOM_ADDR)
2077                 get_random_mask_addr(hwsim->scan_addr,
2078                                      hw_req->req.mac_addr,
2079                                      hw_req->req.mac_addr_mask);
2080         else
2081                 memcpy(hwsim->scan_addr, vif->addr, ETH_ALEN);
2082         memset(hwsim->survey_data, 0, sizeof(hwsim->survey_data));
2083         mutex_unlock(&hwsim->mutex);
2084
2085         wiphy_debug(hw->wiphy, "hwsim hw_scan request\n");
2086
2087         ieee80211_queue_delayed_work(hwsim->hw, &hwsim->hw_scan, 0);
2088
2089         return 0;
2090 }
2091
2092 static void mac80211_hwsim_cancel_hw_scan(struct ieee80211_hw *hw,
2093                                           struct ieee80211_vif *vif)
2094 {
2095         struct mac80211_hwsim_data *hwsim = hw->priv;
2096         struct cfg80211_scan_info info = {
2097                 .aborted = true,
2098         };
2099
2100         wiphy_debug(hw->wiphy, "hwsim cancel_hw_scan\n");
2101
2102         cancel_delayed_work_sync(&hwsim->hw_scan);
2103
2104         mutex_lock(&hwsim->mutex);
2105         ieee80211_scan_completed(hwsim->hw, &info);
2106         hwsim->tmp_chan = NULL;
2107         hwsim->hw_scan_request = NULL;
2108         hwsim->hw_scan_vif = NULL;
2109         mutex_unlock(&hwsim->mutex);
2110 }
2111
2112 static void mac80211_hwsim_sw_scan(struct ieee80211_hw *hw,
2113                                    struct ieee80211_vif *vif,
2114                                    const u8 *mac_addr)
2115 {
2116         struct mac80211_hwsim_data *hwsim = hw->priv;
2117
2118         mutex_lock(&hwsim->mutex);
2119
2120         if (hwsim->scanning) {
2121                 printk(KERN_DEBUG "two hwsim sw_scans detected!\n");
2122                 goto out;
2123         }
2124
2125         printk(KERN_DEBUG "hwsim sw_scan request, prepping stuff\n");
2126
2127         memcpy(hwsim->scan_addr, mac_addr, ETH_ALEN);
2128         hwsim->scanning = true;
2129         memset(hwsim->survey_data, 0, sizeof(hwsim->survey_data));
2130
2131 out:
2132         mutex_unlock(&hwsim->mutex);
2133 }
2134
2135 static void mac80211_hwsim_sw_scan_complete(struct ieee80211_hw *hw,
2136                                             struct ieee80211_vif *vif)
2137 {
2138         struct mac80211_hwsim_data *hwsim = hw->priv;
2139
2140         mutex_lock(&hwsim->mutex);
2141
2142         printk(KERN_DEBUG "hwsim sw_scan_complete\n");
2143         hwsim->scanning = false;
2144         eth_zero_addr(hwsim->scan_addr);
2145
2146         mutex_unlock(&hwsim->mutex);
2147 }
2148
2149 static void hw_roc_start(struct work_struct *work)
2150 {
2151         struct mac80211_hwsim_data *hwsim =
2152                 container_of(work, struct mac80211_hwsim_data, roc_start.work);
2153
2154         mutex_lock(&hwsim->mutex);
2155
2156         wiphy_debug(hwsim->hw->wiphy, "hwsim ROC begins\n");
2157         hwsim->tmp_chan = hwsim->roc_chan;
2158         ieee80211_ready_on_channel(hwsim->hw);
2159
2160         ieee80211_queue_delayed_work(hwsim->hw, &hwsim->roc_done,
2161                                      msecs_to_jiffies(hwsim->roc_duration));
2162
2163         mutex_unlock(&hwsim->mutex);
2164 }
2165
2166 static void hw_roc_done(struct work_struct *work)
2167 {
2168         struct mac80211_hwsim_data *hwsim =
2169                 container_of(work, struct mac80211_hwsim_data, roc_done.work);
2170
2171         mutex_lock(&hwsim->mutex);
2172         ieee80211_remain_on_channel_expired(hwsim->hw);
2173         hwsim->tmp_chan = NULL;
2174         mutex_unlock(&hwsim->mutex);
2175
2176         wiphy_debug(hwsim->hw->wiphy, "hwsim ROC expired\n");
2177 }
2178
2179 static int mac80211_hwsim_roc(struct ieee80211_hw *hw,
2180                               struct ieee80211_vif *vif,
2181                               struct ieee80211_channel *chan,
2182                               int duration,
2183                               enum ieee80211_roc_type type)
2184 {
2185         struct mac80211_hwsim_data *hwsim = hw->priv;
2186
2187         mutex_lock(&hwsim->mutex);
2188         if (WARN_ON(hwsim->tmp_chan || hwsim->hw_scan_request)) {
2189                 mutex_unlock(&hwsim->mutex);
2190                 return -EBUSY;
2191         }
2192
2193         hwsim->roc_chan = chan;
2194         hwsim->roc_duration = duration;
2195         mutex_unlock(&hwsim->mutex);
2196
2197         wiphy_debug(hw->wiphy, "hwsim ROC (%d MHz, %d ms)\n",
2198                     chan->center_freq, duration);
2199         ieee80211_queue_delayed_work(hw, &hwsim->roc_start, HZ/50);
2200
2201         return 0;
2202 }
2203
2204 static int mac80211_hwsim_croc(struct ieee80211_hw *hw)
2205 {
2206         struct mac80211_hwsim_data *hwsim = hw->priv;
2207
2208         cancel_delayed_work_sync(&hwsim->roc_start);
2209         cancel_delayed_work_sync(&hwsim->roc_done);
2210
2211         mutex_lock(&hwsim->mutex);
2212         hwsim->tmp_chan = NULL;
2213         mutex_unlock(&hwsim->mutex);
2214
2215         wiphy_debug(hw->wiphy, "hwsim ROC canceled\n");
2216
2217         return 0;
2218 }
2219
2220 static int mac80211_hwsim_add_chanctx(struct ieee80211_hw *hw,
2221                                       struct ieee80211_chanctx_conf *ctx)
2222 {
2223         hwsim_set_chanctx_magic(ctx);
2224         wiphy_debug(hw->wiphy,
2225                     "add channel context control: %d MHz/width: %d/cfreqs:%d/%d MHz\n",
2226                     ctx->def.chan->center_freq, ctx->def.width,
2227                     ctx->def.center_freq1, ctx->def.center_freq2);
2228         return 0;
2229 }
2230
2231 static void mac80211_hwsim_remove_chanctx(struct ieee80211_hw *hw,
2232                                           struct ieee80211_chanctx_conf *ctx)
2233 {
2234         wiphy_debug(hw->wiphy,
2235                     "remove channel context control: %d MHz/width: %d/cfreqs:%d/%d MHz\n",
2236                     ctx->def.chan->center_freq, ctx->def.width,
2237                     ctx->def.center_freq1, ctx->def.center_freq2);
2238         hwsim_check_chanctx_magic(ctx);
2239         hwsim_clear_chanctx_magic(ctx);
2240 }
2241
2242 static void mac80211_hwsim_change_chanctx(struct ieee80211_hw *hw,
2243                                           struct ieee80211_chanctx_conf *ctx,
2244                                           u32 changed)
2245 {
2246         hwsim_check_chanctx_magic(ctx);
2247         wiphy_debug(hw->wiphy,
2248                     "change channel context control: %d MHz/width: %d/cfreqs:%d/%d MHz\n",
2249                     ctx->def.chan->center_freq, ctx->def.width,
2250                     ctx->def.center_freq1, ctx->def.center_freq2);
2251 }
2252
2253 static int mac80211_hwsim_assign_vif_chanctx(struct ieee80211_hw *hw,
2254                                              struct ieee80211_vif *vif,
2255                                              struct ieee80211_chanctx_conf *ctx)
2256 {
2257         hwsim_check_magic(vif);
2258         hwsim_check_chanctx_magic(ctx);
2259
2260         return 0;
2261 }
2262
2263 static void mac80211_hwsim_unassign_vif_chanctx(struct ieee80211_hw *hw,
2264                                                 struct ieee80211_vif *vif,
2265                                                 struct ieee80211_chanctx_conf *ctx)
2266 {
2267         hwsim_check_magic(vif);
2268         hwsim_check_chanctx_magic(ctx);
2269 }
2270
2271 static const char mac80211_hwsim_gstrings_stats[][ETH_GSTRING_LEN] = {
2272         "tx_pkts_nic",
2273         "tx_bytes_nic",
2274         "rx_pkts_nic",
2275         "rx_bytes_nic",
2276         "d_tx_dropped",
2277         "d_tx_failed",
2278         "d_ps_mode",
2279         "d_group",
2280 };
2281
2282 #define MAC80211_HWSIM_SSTATS_LEN ARRAY_SIZE(mac80211_hwsim_gstrings_stats)
2283
2284 static void mac80211_hwsim_get_et_strings(struct ieee80211_hw *hw,
2285                                           struct ieee80211_vif *vif,
2286                                           u32 sset, u8 *data)
2287 {
2288         if (sset == ETH_SS_STATS)
2289                 memcpy(data, *mac80211_hwsim_gstrings_stats,
2290                        sizeof(mac80211_hwsim_gstrings_stats));
2291 }
2292
2293 static int mac80211_hwsim_get_et_sset_count(struct ieee80211_hw *hw,
2294                                             struct ieee80211_vif *vif, int sset)
2295 {
2296         if (sset == ETH_SS_STATS)
2297                 return MAC80211_HWSIM_SSTATS_LEN;
2298         return 0;
2299 }
2300
2301 static void mac80211_hwsim_get_et_stats(struct ieee80211_hw *hw,
2302                                         struct ieee80211_vif *vif,
2303                                         struct ethtool_stats *stats, u64 *data)
2304 {
2305         struct mac80211_hwsim_data *ar = hw->priv;
2306         int i = 0;
2307
2308         data[i++] = ar->tx_pkts;
2309         data[i++] = ar->tx_bytes;
2310         data[i++] = ar->rx_pkts;
2311         data[i++] = ar->rx_bytes;
2312         data[i++] = ar->tx_dropped;
2313         data[i++] = ar->tx_failed;
2314         data[i++] = ar->ps;
2315         data[i++] = ar->group;
2316
2317         WARN_ON(i != MAC80211_HWSIM_SSTATS_LEN);
2318 }
2319
2320 #define HWSIM_COMMON_OPS                                        \
2321         .tx = mac80211_hwsim_tx,                                \
2322         .start = mac80211_hwsim_start,                          \
2323         .stop = mac80211_hwsim_stop,                            \
2324         .add_interface = mac80211_hwsim_add_interface,          \
2325         .change_interface = mac80211_hwsim_change_interface,    \
2326         .remove_interface = mac80211_hwsim_remove_interface,    \
2327         .config = mac80211_hwsim_config,                        \
2328         .configure_filter = mac80211_hwsim_configure_filter,    \
2329         .bss_info_changed = mac80211_hwsim_bss_info_changed,    \
2330         .sta_add = mac80211_hwsim_sta_add,                      \
2331         .sta_remove = mac80211_hwsim_sta_remove,                \
2332         .sta_notify = mac80211_hwsim_sta_notify,                \
2333         .set_tim = mac80211_hwsim_set_tim,                      \
2334         .conf_tx = mac80211_hwsim_conf_tx,                      \
2335         .get_survey = mac80211_hwsim_get_survey,                \
2336         CFG80211_TESTMODE_CMD(mac80211_hwsim_testmode_cmd)      \
2337         .ampdu_action = mac80211_hwsim_ampdu_action,            \
2338         .flush = mac80211_hwsim_flush,                          \
2339         .get_tsf = mac80211_hwsim_get_tsf,                      \
2340         .set_tsf = mac80211_hwsim_set_tsf,                      \
2341         .get_et_sset_count = mac80211_hwsim_get_et_sset_count,  \
2342         .get_et_stats = mac80211_hwsim_get_et_stats,            \
2343         .get_et_strings = mac80211_hwsim_get_et_strings,
2344
2345 static const struct ieee80211_ops mac80211_hwsim_ops = {
2346         HWSIM_COMMON_OPS
2347         .sw_scan_start = mac80211_hwsim_sw_scan,
2348         .sw_scan_complete = mac80211_hwsim_sw_scan_complete,
2349 };
2350
2351 static const struct ieee80211_ops mac80211_hwsim_mchan_ops = {
2352         HWSIM_COMMON_OPS
2353         .hw_scan = mac80211_hwsim_hw_scan,
2354         .cancel_hw_scan = mac80211_hwsim_cancel_hw_scan,
2355         .sw_scan_start = NULL,
2356         .sw_scan_complete = NULL,
2357         .remain_on_channel = mac80211_hwsim_roc,
2358         .cancel_remain_on_channel = mac80211_hwsim_croc,
2359         .add_chanctx = mac80211_hwsim_add_chanctx,
2360         .remove_chanctx = mac80211_hwsim_remove_chanctx,
2361         .change_chanctx = mac80211_hwsim_change_chanctx,
2362         .assign_vif_chanctx = mac80211_hwsim_assign_vif_chanctx,
2363         .unassign_vif_chanctx = mac80211_hwsim_unassign_vif_chanctx,
2364 };
2365
2366 struct hwsim_new_radio_params {
2367         unsigned int channels;
2368         const char *reg_alpha2;
2369         const struct ieee80211_regdomain *regd;
2370         bool reg_strict;
2371         bool p2p_device;
2372         bool use_chanctx;
2373         bool destroy_on_close;
2374         const char *hwname;
2375         bool no_vif;
2376 };
2377
2378 static void hwsim_mcast_config_msg(struct sk_buff *mcast_skb,
2379                                    struct genl_info *info)
2380 {
2381         if (info)
2382                 genl_notify(&hwsim_genl_family, mcast_skb, info,
2383                             HWSIM_MCGRP_CONFIG, GFP_KERNEL);
2384         else
2385                 genlmsg_multicast(&hwsim_genl_family, mcast_skb, 0,
2386                                   HWSIM_MCGRP_CONFIG, GFP_KERNEL);
2387 }
2388
2389 static int append_radio_msg(struct sk_buff *skb, int id,
2390                             struct hwsim_new_radio_params *param)
2391 {
2392         int ret;
2393
2394         ret = nla_put_u32(skb, HWSIM_ATTR_RADIO_ID, id);
2395         if (ret < 0)
2396                 return ret;
2397
2398         if (param->channels) {
2399                 ret = nla_put_u32(skb, HWSIM_ATTR_CHANNELS, param->channels);
2400                 if (ret < 0)
2401                         return ret;
2402         }
2403
2404         if (param->reg_alpha2) {
2405                 ret = nla_put(skb, HWSIM_ATTR_REG_HINT_ALPHA2, 2,
2406                               param->reg_alpha2);
2407                 if (ret < 0)
2408                         return ret;
2409         }
2410
2411         if (param->regd) {
2412                 int i;
2413
2414                 for (i = 0; i < ARRAY_SIZE(hwsim_world_regdom_custom); i++) {
2415                         if (hwsim_world_regdom_custom[i] != param->regd)
2416                                 continue;
2417
2418                         ret = nla_put_u32(skb, HWSIM_ATTR_REG_CUSTOM_REG, i);
2419                         if (ret < 0)
2420                                 return ret;
2421                         break;
2422                 }
2423         }
2424
2425         if (param->reg_strict) {
2426                 ret = nla_put_flag(skb, HWSIM_ATTR_REG_STRICT_REG);
2427                 if (ret < 0)
2428                         return ret;
2429         }
2430
2431         if (param->p2p_device) {
2432                 ret = nla_put_flag(skb, HWSIM_ATTR_SUPPORT_P2P_DEVICE);
2433                 if (ret < 0)
2434                         return ret;
2435         }
2436
2437         if (param->use_chanctx) {
2438                 ret = nla_put_flag(skb, HWSIM_ATTR_USE_CHANCTX);
2439                 if (ret < 0)
2440                         return ret;
2441         }
2442
2443         if (param->hwname) {
2444                 ret = nla_put(skb, HWSIM_ATTR_RADIO_NAME,
2445                               strlen(param->hwname), param->hwname);
2446                 if (ret < 0)
2447                         return ret;
2448         }
2449
2450         return 0;
2451 }
2452
2453 static void hwsim_mcast_new_radio(int id, struct genl_info *info,
2454                                   struct hwsim_new_radio_params *param)
2455 {
2456         struct sk_buff *mcast_skb;
2457         void *data;
2458
2459         mcast_skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2460         if (!mcast_skb)
2461                 return;
2462
2463         data = genlmsg_put(mcast_skb, 0, 0, &hwsim_genl_family, 0,
2464                            HWSIM_CMD_NEW_RADIO);
2465         if (!data)
2466                 goto out_err;
2467
2468         if (append_radio_msg(mcast_skb, id, param) < 0)
2469                 goto out_err;
2470
2471         genlmsg_end(mcast_skb, data);
2472
2473         hwsim_mcast_config_msg(mcast_skb, info);
2474         return;
2475
2476 out_err:
2477         genlmsg_cancel(mcast_skb, data);
2478         nlmsg_free(mcast_skb);
2479 }
2480
2481 static int mac80211_hwsim_new_radio(struct genl_info *info,
2482                                     struct hwsim_new_radio_params *param)
2483 {
2484         int err;
2485         u8 addr[ETH_ALEN];
2486         struct mac80211_hwsim_data *data;
2487         struct ieee80211_hw *hw;
2488         enum nl80211_band band;
2489         const struct ieee80211_ops *ops = &mac80211_hwsim_ops;
2490         struct net *net;
2491         int idx;
2492
2493         if (WARN_ON(param->channels > 1 && !param->use_chanctx))
2494                 return -EINVAL;
2495
2496         spin_lock_bh(&hwsim_radio_lock);
2497         idx = hwsim_radio_idx++;
2498         spin_unlock_bh(&hwsim_radio_lock);
2499
2500         if (param->use_chanctx)
2501                 ops = &mac80211_hwsim_mchan_ops;
2502         hw = ieee80211_alloc_hw_nm(sizeof(*data), ops, param->hwname);
2503         if (!hw) {
2504                 printk(KERN_DEBUG "mac80211_hwsim: ieee80211_alloc_hw failed\n");
2505                 err = -ENOMEM;
2506                 goto failed;
2507         }
2508
2509         /* ieee80211_alloc_hw_nm may have used a default name */
2510         param->hwname = wiphy_name(hw->wiphy);
2511
2512         if (info)
2513                 net = genl_info_net(info);
2514         else
2515                 net = &init_net;
2516         wiphy_net_set(hw->wiphy, net);
2517
2518         data = hw->priv;
2519         data->hw = hw;
2520
2521         data->dev = device_create(hwsim_class, NULL, 0, hw, "hwsim%d", idx);
2522         if (IS_ERR(data->dev)) {
2523                 printk(KERN_DEBUG
2524                        "mac80211_hwsim: device_create failed (%ld)\n",
2525                        PTR_ERR(data->dev));
2526                 err = -ENOMEM;
2527                 goto failed_drvdata;
2528         }
2529         data->dev->driver = &mac80211_hwsim_driver.driver;
2530         err = device_bind_driver(data->dev);
2531         if (err != 0) {
2532                 printk(KERN_DEBUG "mac80211_hwsim: device_bind_driver failed (%d)\n",
2533                        err);
2534                 goto failed_bind;
2535         }
2536
2537         skb_queue_head_init(&data->pending);
2538
2539         SET_IEEE80211_DEV(hw, data->dev);
2540         eth_zero_addr(addr);
2541         addr[0] = 0x02;
2542         addr[3] = idx >> 8;
2543         addr[4] = idx;
2544         memcpy(data->addresses[0].addr, addr, ETH_ALEN);
2545         memcpy(data->addresses[1].addr, addr, ETH_ALEN);
2546         data->addresses[1].addr[0] |= 0x40;
2547         hw->wiphy->n_addresses = 2;
2548         hw->wiphy->addresses = data->addresses;
2549
2550         data->channels = param->channels;
2551         data->use_chanctx = param->use_chanctx;
2552         data->idx = idx;
2553         data->destroy_on_close = param->destroy_on_close;
2554         if (info)
2555                 data->portid = info->snd_portid;
2556
2557         if (data->use_chanctx) {
2558                 hw->wiphy->max_scan_ssids = 255;
2559                 hw->wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
2560                 hw->wiphy->max_remain_on_channel_duration = 1000;
2561                 hw->wiphy->iface_combinations = &data->if_combination;
2562                 if (param->p2p_device)
2563                         data->if_combination = hwsim_if_comb_p2p_dev[0];
2564                 else
2565                         data->if_combination = hwsim_if_comb[0];
2566                 hw->wiphy->n_iface_combinations = 1;
2567                 /* For channels > 1 DFS is not allowed */
2568                 data->if_combination.radar_detect_widths = 0;
2569                 data->if_combination.num_different_channels = data->channels;
2570         } else if (param->p2p_device) {
2571                 hw->wiphy->iface_combinations = hwsim_if_comb_p2p_dev;
2572                 hw->wiphy->n_iface_combinations =
2573                         ARRAY_SIZE(hwsim_if_comb_p2p_dev);
2574         } else {
2575                 hw->wiphy->iface_combinations = hwsim_if_comb;
2576                 hw->wiphy->n_iface_combinations = ARRAY_SIZE(hwsim_if_comb);
2577         }
2578
2579         INIT_DELAYED_WORK(&data->roc_start, hw_roc_start);
2580         INIT_DELAYED_WORK(&data->roc_done, hw_roc_done);
2581         INIT_DELAYED_WORK(&data->hw_scan, hw_scan_work);
2582
2583         hw->queues = 5;
2584         hw->offchannel_tx_hw_queue = 4;
2585         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
2586                                      BIT(NL80211_IFTYPE_AP) |
2587                                      BIT(NL80211_IFTYPE_P2P_CLIENT) |
2588                                      BIT(NL80211_IFTYPE_P2P_GO) |
2589                                      BIT(NL80211_IFTYPE_ADHOC) |
2590                                      BIT(NL80211_IFTYPE_MESH_POINT);
2591
2592         if (param->p2p_device)
2593                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_P2P_DEVICE);
2594
2595         ieee80211_hw_set(hw, SUPPORT_FAST_XMIT);
2596         ieee80211_hw_set(hw, CHANCTX_STA_CSA);
2597         ieee80211_hw_set(hw, SUPPORTS_HT_CCK_RATES);
2598         ieee80211_hw_set(hw, QUEUE_CONTROL);
2599         ieee80211_hw_set(hw, WANT_MONITOR_VIF);
2600         ieee80211_hw_set(hw, AMPDU_AGGREGATION);
2601         ieee80211_hw_set(hw, MFP_CAPABLE);
2602         ieee80211_hw_set(hw, SIGNAL_DBM);
2603         ieee80211_hw_set(hw, TDLS_WIDER_BW);
2604         if (rctbl)
2605                 ieee80211_hw_set(hw, SUPPORTS_RC_TABLE);
2606
2607         hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS |
2608                             WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL |
2609                             WIPHY_FLAG_AP_UAPSD |
2610                             WIPHY_FLAG_HAS_CHANNEL_SWITCH;
2611         hw->wiphy->features |= NL80211_FEATURE_ACTIVE_MONITOR |
2612                                NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE |
2613                                NL80211_FEATURE_STATIC_SMPS |
2614                                NL80211_FEATURE_DYNAMIC_SMPS |
2615                                NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR;
2616         wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_VHT_IBSS);
2617
2618         /* ask mac80211 to reserve space for magic */
2619         hw->vif_data_size = sizeof(struct hwsim_vif_priv);
2620         hw->sta_data_size = sizeof(struct hwsim_sta_priv);
2621         hw->chanctx_data_size = sizeof(struct hwsim_chanctx_priv);
2622
2623         memcpy(data->channels_2ghz, hwsim_channels_2ghz,
2624                 sizeof(hwsim_channels_2ghz));
2625         memcpy(data->channels_5ghz, hwsim_channels_5ghz,
2626                 sizeof(hwsim_channels_5ghz));
2627         memcpy(data->rates, hwsim_rates, sizeof(hwsim_rates));
2628
2629         for (band = NL80211_BAND_2GHZ; band < NUM_NL80211_BANDS; band++) {
2630                 struct ieee80211_supported_band *sband = &data->bands[band];
2631                 switch (band) {
2632                 case NL80211_BAND_2GHZ:
2633                         sband->channels = data->channels_2ghz;
2634                         sband->n_channels = ARRAY_SIZE(hwsim_channels_2ghz);
2635                         sband->bitrates = data->rates;
2636                         sband->n_bitrates = ARRAY_SIZE(hwsim_rates);
2637                         break;
2638                 case NL80211_BAND_5GHZ:
2639                         sband->channels = data->channels_5ghz;
2640                         sband->n_channels = ARRAY_SIZE(hwsim_channels_5ghz);
2641                         sband->bitrates = data->rates + 4;
2642                         sband->n_bitrates = ARRAY_SIZE(hwsim_rates) - 4;
2643
2644                         sband->vht_cap.vht_supported = true;
2645                         sband->vht_cap.cap =
2646                                 IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454 |
2647                                 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ |
2648                                 IEEE80211_VHT_CAP_RXLDPC |
2649                                 IEEE80211_VHT_CAP_SHORT_GI_80 |
2650                                 IEEE80211_VHT_CAP_SHORT_GI_160 |
2651                                 IEEE80211_VHT_CAP_TXSTBC |
2652                                 IEEE80211_VHT_CAP_RXSTBC_4 |
2653                                 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
2654                         sband->vht_cap.vht_mcs.rx_mcs_map =
2655                                 cpu_to_le16(IEEE80211_VHT_MCS_SUPPORT_0_9 << 0 |
2656                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 2 |
2657                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 4 |
2658                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 6 |
2659                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 8 |
2660                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 10 |
2661                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 12 |
2662                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 14);
2663                         sband->vht_cap.vht_mcs.tx_mcs_map =
2664                                 sband->vht_cap.vht_mcs.rx_mcs_map;
2665                         break;
2666                 default:
2667                         continue;
2668                 }
2669
2670                 sband->ht_cap.ht_supported = true;
2671                 sband->ht_cap.cap = IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
2672                                     IEEE80211_HT_CAP_GRN_FLD |
2673                                     IEEE80211_HT_CAP_SGI_20 |
2674                                     IEEE80211_HT_CAP_SGI_40 |
2675                                     IEEE80211_HT_CAP_DSSSCCK40;
2676                 sband->ht_cap.ampdu_factor = 0x3;
2677                 sband->ht_cap.ampdu_density = 0x6;
2678                 memset(&sband->ht_cap.mcs, 0,
2679                        sizeof(sband->ht_cap.mcs));
2680                 sband->ht_cap.mcs.rx_mask[0] = 0xff;
2681                 sband->ht_cap.mcs.rx_mask[1] = 0xff;
2682                 sband->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
2683
2684                 hw->wiphy->bands[band] = sband;
2685         }
2686
2687         /* By default all radios belong to the first group */
2688         data->group = 1;
2689         mutex_init(&data->mutex);
2690
2691         data->netgroup = hwsim_net_get_netgroup(net);
2692
2693         /* Enable frame retransmissions for lossy channels */
2694         hw->max_rates = 4;
2695         hw->max_rate_tries = 11;
2696
2697         hw->wiphy->vendor_commands = mac80211_hwsim_vendor_commands;
2698         hw->wiphy->n_vendor_commands =
2699                 ARRAY_SIZE(mac80211_hwsim_vendor_commands);
2700         hw->wiphy->vendor_events = mac80211_hwsim_vendor_events;
2701         hw->wiphy->n_vendor_events = ARRAY_SIZE(mac80211_hwsim_vendor_events);
2702
2703         if (param->reg_strict)
2704                 hw->wiphy->regulatory_flags |= REGULATORY_STRICT_REG;
2705         if (param->regd) {
2706                 data->regd = param->regd;
2707                 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG;
2708                 wiphy_apply_custom_regulatory(hw->wiphy, param->regd);
2709                 /* give the regulatory workqueue a chance to run */
2710                 schedule_timeout_interruptible(1);
2711         }
2712
2713         if (param->no_vif)
2714                 ieee80211_hw_set(hw, NO_AUTO_VIF);
2715
2716         wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
2717
2718         tasklet_hrtimer_init(&data->beacon_timer,
2719                              mac80211_hwsim_beacon,
2720                              CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2721
2722         err = ieee80211_register_hw(hw);
2723         if (err < 0) {
2724                 printk(KERN_DEBUG "mac80211_hwsim: ieee80211_register_hw failed (%d)\n",
2725                        err);
2726                 goto failed_hw;
2727         }
2728
2729         wiphy_debug(hw->wiphy, "hwaddr %pM registered\n", hw->wiphy->perm_addr);
2730
2731         if (param->reg_alpha2) {
2732                 data->alpha2[0] = param->reg_alpha2[0];
2733                 data->alpha2[1] = param->reg_alpha2[1];
2734                 regulatory_hint(hw->wiphy, param->reg_alpha2);
2735         }
2736
2737         data->debugfs = debugfs_create_dir("hwsim", hw->wiphy->debugfsdir);
2738         debugfs_create_file("ps", 0666, data->debugfs, data, &hwsim_fops_ps);
2739         debugfs_create_file("group", 0666, data->debugfs, data,
2740                             &hwsim_fops_group);
2741         if (!data->use_chanctx)
2742                 debugfs_create_file("dfs_simulate_radar", 0222,
2743                                     data->debugfs,
2744                                     data, &hwsim_simulate_radar);
2745
2746         spin_lock_bh(&hwsim_radio_lock);
2747         list_add_tail(&data->list, &hwsim_radios);
2748         spin_unlock_bh(&hwsim_radio_lock);
2749
2750         hwsim_mcast_new_radio(idx, info, param);
2751
2752         return idx;
2753
2754 failed_hw:
2755         device_release_driver(data->dev);
2756 failed_bind:
2757         device_unregister(data->dev);
2758 failed_drvdata:
2759         ieee80211_free_hw(hw);
2760 failed:
2761         return err;
2762 }
2763
2764 static void hwsim_mcast_del_radio(int id, const char *hwname,
2765                                   struct genl_info *info)
2766 {
2767         struct sk_buff *skb;
2768         void *data;
2769         int ret;
2770
2771         skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2772         if (!skb)
2773                 return;
2774
2775         data = genlmsg_put(skb, 0, 0, &hwsim_genl_family, 0,
2776                            HWSIM_CMD_DEL_RADIO);
2777         if (!data)
2778                 goto error;
2779
2780         ret = nla_put_u32(skb, HWSIM_ATTR_RADIO_ID, id);
2781         if (ret < 0)
2782                 goto error;
2783
2784         ret = nla_put(skb, HWSIM_ATTR_RADIO_NAME, strlen(hwname),
2785                       hwname);
2786         if (ret < 0)
2787                 goto error;
2788
2789         genlmsg_end(skb, data);
2790
2791         hwsim_mcast_config_msg(skb, info);
2792
2793         return;
2794
2795 error:
2796         nlmsg_free(skb);
2797 }
2798
2799 static void mac80211_hwsim_del_radio(struct mac80211_hwsim_data *data,
2800                                      const char *hwname,
2801                                      struct genl_info *info)
2802 {
2803         hwsim_mcast_del_radio(data->idx, hwname, info);
2804         debugfs_remove_recursive(data->debugfs);
2805         ieee80211_unregister_hw(data->hw);
2806         device_release_driver(data->dev);
2807         device_unregister(data->dev);
2808         ieee80211_free_hw(data->hw);
2809 }
2810
2811 static int mac80211_hwsim_get_radio(struct sk_buff *skb,
2812                                     struct mac80211_hwsim_data *data,
2813                                     u32 portid, u32 seq,
2814                                     struct netlink_callback *cb, int flags)
2815 {
2816         void *hdr;
2817         struct hwsim_new_radio_params param = { };
2818         int res = -EMSGSIZE;
2819
2820         hdr = genlmsg_put(skb, portid, seq, &hwsim_genl_family, flags,
2821                           HWSIM_CMD_GET_RADIO);
2822         if (!hdr)
2823                 return -EMSGSIZE;
2824
2825         if (cb)
2826                 genl_dump_check_consistent(cb, hdr, &hwsim_genl_family);
2827
2828         if (data->alpha2[0] && data->alpha2[1])
2829                 param.reg_alpha2 = data->alpha2;
2830
2831         param.reg_strict = !!(data->hw->wiphy->regulatory_flags &
2832                                         REGULATORY_STRICT_REG);
2833         param.p2p_device = !!(data->hw->wiphy->interface_modes &
2834                                         BIT(NL80211_IFTYPE_P2P_DEVICE));
2835         param.use_chanctx = data->use_chanctx;
2836         param.regd = data->regd;
2837         param.channels = data->channels;
2838         param.hwname = wiphy_name(data->hw->wiphy);
2839
2840         res = append_radio_msg(skb, data->idx, &param);
2841         if (res < 0)
2842                 goto out_err;
2843
2844         genlmsg_end(skb, hdr);
2845         return 0;
2846
2847 out_err:
2848         genlmsg_cancel(skb, hdr);
2849         return res;
2850 }
2851
2852 static void mac80211_hwsim_free(void)
2853 {
2854         struct mac80211_hwsim_data *data;
2855
2856         spin_lock_bh(&hwsim_radio_lock);
2857         while ((data = list_first_entry_or_null(&hwsim_radios,
2858                                                 struct mac80211_hwsim_data,
2859                                                 list))) {
2860                 list_del(&data->list);
2861                 spin_unlock_bh(&hwsim_radio_lock);
2862                 mac80211_hwsim_del_radio(data, wiphy_name(data->hw->wiphy),
2863                                          NULL);
2864                 spin_lock_bh(&hwsim_radio_lock);
2865         }
2866         spin_unlock_bh(&hwsim_radio_lock);
2867         class_destroy(hwsim_class);
2868 }
2869
2870 static const struct net_device_ops hwsim_netdev_ops = {
2871         .ndo_start_xmit         = hwsim_mon_xmit,
2872         .ndo_set_mac_address    = eth_mac_addr,
2873         .ndo_validate_addr      = eth_validate_addr,
2874 };
2875
2876 static void hwsim_mon_setup(struct net_device *dev)
2877 {
2878         dev->netdev_ops = &hwsim_netdev_ops;
2879         dev->needs_free_netdev = true;
2880         ether_setup(dev);
2881         dev->priv_flags |= IFF_NO_QUEUE;
2882         dev->type = ARPHRD_IEEE80211_RADIOTAP;
2883         eth_zero_addr(dev->dev_addr);
2884         dev->dev_addr[0] = 0x12;
2885 }
2886
2887 static struct mac80211_hwsim_data *get_hwsim_data_ref_from_addr(const u8 *addr)
2888 {
2889         struct mac80211_hwsim_data *data;
2890         bool _found = false;
2891
2892         spin_lock_bh(&hwsim_radio_lock);
2893         list_for_each_entry(data, &hwsim_radios, list) {
2894                 if (memcmp(data->addresses[1].addr, addr, ETH_ALEN) == 0) {
2895                         _found = true;
2896                         break;
2897                 }
2898         }
2899         spin_unlock_bh(&hwsim_radio_lock);
2900
2901         if (!_found)
2902                 return NULL;
2903
2904         return data;
2905 }
2906
2907 static void hwsim_register_wmediumd(struct net *net, u32 portid)
2908 {
2909         struct mac80211_hwsim_data *data;
2910
2911         hwsim_net_set_wmediumd(net, portid);
2912
2913         spin_lock_bh(&hwsim_radio_lock);
2914         list_for_each_entry(data, &hwsim_radios, list) {
2915                 if (data->netgroup == hwsim_net_get_netgroup(net))
2916                         data->wmediumd = portid;
2917         }
2918         spin_unlock_bh(&hwsim_radio_lock);
2919 }
2920
2921 static int hwsim_tx_info_frame_received_nl(struct sk_buff *skb_2,
2922                                            struct genl_info *info)
2923 {
2924
2925         struct ieee80211_hdr *hdr;
2926         struct mac80211_hwsim_data *data2;
2927         struct ieee80211_tx_info *txi;
2928         struct hwsim_tx_rate *tx_attempts;
2929         u64 ret_skb_cookie;
2930         struct sk_buff *skb, *tmp;
2931         const u8 *src;
2932         unsigned int hwsim_flags;
2933         int i;
2934         bool found = false;
2935
2936         if (!info->attrs[HWSIM_ATTR_ADDR_TRANSMITTER] ||
2937             !info->attrs[HWSIM_ATTR_FLAGS] ||
2938             !info->attrs[HWSIM_ATTR_COOKIE] ||
2939             !info->attrs[HWSIM_ATTR_SIGNAL] ||
2940             !info->attrs[HWSIM_ATTR_TX_INFO])
2941                 goto out;
2942
2943         src = (void *)nla_data(info->attrs[HWSIM_ATTR_ADDR_TRANSMITTER]);
2944         hwsim_flags = nla_get_u32(info->attrs[HWSIM_ATTR_FLAGS]);
2945         ret_skb_cookie = nla_get_u64(info->attrs[HWSIM_ATTR_COOKIE]);
2946
2947         data2 = get_hwsim_data_ref_from_addr(src);
2948         if (!data2)
2949                 goto out;
2950
2951         if (hwsim_net_get_netgroup(genl_info_net(info)) != data2->netgroup)
2952                 goto out;
2953
2954         if (info->snd_portid != data2->wmediumd)
2955                 goto out;
2956
2957         /* look for the skb matching the cookie passed back from user */
2958         skb_queue_walk_safe(&data2->pending, skb, tmp) {
2959                 u64 skb_cookie;
2960
2961                 txi = IEEE80211_SKB_CB(skb);
2962                 skb_cookie = (u64)(uintptr_t)txi->rate_driver_data[0];
2963
2964                 if (skb_cookie == ret_skb_cookie) {
2965                         skb_unlink(skb, &data2->pending);
2966                         found = true;
2967                         break;
2968                 }
2969         }
2970
2971         /* not found */
2972         if (!found)
2973                 goto out;
2974
2975         /* Tx info received because the frame was broadcasted on user space,
2976          so we get all the necessary info: tx attempts and skb control buff */
2977
2978         tx_attempts = (struct hwsim_tx_rate *)nla_data(
2979                        info->attrs[HWSIM_ATTR_TX_INFO]);
2980
2981         /* now send back TX status */
2982         txi = IEEE80211_SKB_CB(skb);
2983
2984         ieee80211_tx_info_clear_status(txi);
2985
2986         for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
2987                 txi->status.rates[i].idx = tx_attempts[i].idx;
2988                 txi->status.rates[i].count = tx_attempts[i].count;
2989                 /*txi->status.rates[i].flags = 0;*/
2990         }
2991
2992         txi->status.ack_signal = nla_get_u32(info->attrs[HWSIM_ATTR_SIGNAL]);
2993
2994         if (!(hwsim_flags & HWSIM_TX_CTL_NO_ACK) &&
2995            (hwsim_flags & HWSIM_TX_STAT_ACK)) {
2996                 if (skb->len >= 16) {
2997                         hdr = (struct ieee80211_hdr *) skb->data;
2998                         mac80211_hwsim_monitor_ack(data2->channel,
2999                                                    hdr->addr2);
3000                 }
3001                 txi->flags |= IEEE80211_TX_STAT_ACK;
3002         }
3003
3004         if (hwsim_flags & HWSIM_TX_CTL_NO_ACK)
3005                 txi->flags |= IEEE80211_TX_STAT_NOACK_TRANSMITTED;
3006
3007         ieee80211_tx_status_irqsafe(data2->hw, skb);
3008         return 0;
3009 out:
3010         return -EINVAL;
3011
3012 }
3013
3014 static int hwsim_cloned_frame_received_nl(struct sk_buff *skb_2,
3015                                           struct genl_info *info)
3016 {
3017         struct mac80211_hwsim_data *data2;
3018         struct ieee80211_rx_status rx_status;
3019         const u8 *dst;
3020         int frame_data_len;
3021         void *frame_data;
3022         struct sk_buff *skb = NULL;
3023
3024         if (!info->attrs[HWSIM_ATTR_ADDR_RECEIVER] ||
3025             !info->attrs[HWSIM_ATTR_FRAME] ||
3026             !info->attrs[HWSIM_ATTR_RX_RATE] ||
3027             !info->attrs[HWSIM_ATTR_SIGNAL])
3028                 goto out;
3029
3030         dst = (void *)nla_data(info->attrs[HWSIM_ATTR_ADDR_RECEIVER]);
3031         frame_data_len = nla_len(info->attrs[HWSIM_ATTR_FRAME]);
3032         frame_data = (void *)nla_data(info->attrs[HWSIM_ATTR_FRAME]);
3033
3034         /* Allocate new skb here */
3035         skb = alloc_skb(frame_data_len, GFP_KERNEL);
3036         if (skb == NULL)
3037                 goto err;
3038
3039         if (frame_data_len > IEEE80211_MAX_DATA_LEN)
3040                 goto err;
3041
3042         /* Copy the data */
3043         skb_put_data(skb, frame_data, frame_data_len);
3044
3045         data2 = get_hwsim_data_ref_from_addr(dst);
3046         if (!data2)
3047                 goto out;
3048
3049         if (hwsim_net_get_netgroup(genl_info_net(info)) != data2->netgroup)
3050                 goto out;
3051
3052         if (info->snd_portid != data2->wmediumd)
3053                 goto out;
3054
3055         /* check if radio is configured properly */
3056
3057         if (data2->idle || !data2->started)
3058                 goto out;
3059
3060         /* A frame is received from user space */
3061         memset(&rx_status, 0, sizeof(rx_status));
3062         if (info->attrs[HWSIM_ATTR_FREQ]) {
3063                 /* throw away off-channel packets, but allow both the temporary
3064                  * ("hw" scan/remain-on-channel) and regular channel, since the
3065                  * internal datapath also allows this
3066                  */
3067                 mutex_lock(&data2->mutex);
3068                 rx_status.freq = nla_get_u32(info->attrs[HWSIM_ATTR_FREQ]);
3069
3070                 if (rx_status.freq != data2->channel->center_freq &&
3071                     (!data2->tmp_chan ||
3072                      rx_status.freq != data2->tmp_chan->center_freq)) {
3073                         mutex_unlock(&data2->mutex);
3074                         goto out;
3075                 }
3076                 mutex_unlock(&data2->mutex);
3077         } else {
3078                 rx_status.freq = data2->channel->center_freq;
3079         }
3080
3081         rx_status.band = data2->channel->band;
3082         rx_status.rate_idx = nla_get_u32(info->attrs[HWSIM_ATTR_RX_RATE]);
3083         if (rx_status.rate_idx >= data2->hw->wiphy->bands[rx_status.band]->n_bitrates)
3084                 goto out;
3085         rx_status.signal = nla_get_u32(info->attrs[HWSIM_ATTR_SIGNAL]);
3086
3087         memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
3088         data2->rx_pkts++;
3089         data2->rx_bytes += skb->len;
3090         ieee80211_rx_irqsafe(data2->hw, skb);
3091
3092         return 0;
3093 err:
3094         printk(KERN_DEBUG "mac80211_hwsim: error occurred in %s\n", __func__);
3095 out:
3096         dev_kfree_skb(skb);
3097         return -EINVAL;
3098 }
3099
3100 static int hwsim_register_received_nl(struct sk_buff *skb_2,
3101                                       struct genl_info *info)
3102 {
3103         struct net *net = genl_info_net(info);
3104         struct mac80211_hwsim_data *data;
3105         int chans = 1;
3106
3107         spin_lock_bh(&hwsim_radio_lock);
3108         list_for_each_entry(data, &hwsim_radios, list)
3109                 chans = max(chans, data->channels);
3110         spin_unlock_bh(&hwsim_radio_lock);
3111
3112         /* In the future we should revise the userspace API and allow it
3113          * to set a flag that it does support multi-channel, then we can
3114          * let this pass conditionally on the flag.
3115          * For current userspace, prohibit it since it won't work right.
3116          */
3117         if (chans > 1)
3118                 return -EOPNOTSUPP;
3119
3120         if (hwsim_net_get_wmediumd(net))
3121                 return -EBUSY;
3122
3123         hwsim_register_wmediumd(net, info->snd_portid);
3124
3125         printk(KERN_DEBUG "mac80211_hwsim: received a REGISTER, "
3126                "switching to wmediumd mode with pid %d\n", info->snd_portid);
3127
3128         return 0;
3129 }
3130
3131 static int hwsim_new_radio_nl(struct sk_buff *msg, struct genl_info *info)
3132 {
3133         struct hwsim_new_radio_params param = { 0 };
3134         const char *hwname = NULL;
3135         int ret;
3136
3137         param.reg_strict = info->attrs[HWSIM_ATTR_REG_STRICT_REG];
3138         param.p2p_device = info->attrs[HWSIM_ATTR_SUPPORT_P2P_DEVICE];
3139         param.channels = channels;
3140         param.destroy_on_close =
3141                 info->attrs[HWSIM_ATTR_DESTROY_RADIO_ON_CLOSE];
3142
3143         if (info->attrs[HWSIM_ATTR_CHANNELS])
3144                 param.channels = nla_get_u32(info->attrs[HWSIM_ATTR_CHANNELS]);
3145
3146         if (param.channels < 1) {
3147                 GENL_SET_ERR_MSG(info, "must have at least one channel");
3148                 return -EINVAL;
3149         }
3150
3151         if (param.channels > CFG80211_MAX_NUM_DIFFERENT_CHANNELS) {
3152                 GENL_SET_ERR_MSG(info, "too many channels specified");
3153                 return -EINVAL;
3154         }
3155
3156         if (info->attrs[HWSIM_ATTR_NO_VIF])
3157                 param.no_vif = true;
3158
3159         if (info->attrs[HWSIM_ATTR_RADIO_NAME]) {
3160                 hwname = kstrndup((char *)nla_data(info->attrs[HWSIM_ATTR_RADIO_NAME]),
3161                                   nla_len(info->attrs[HWSIM_ATTR_RADIO_NAME]),
3162                                   GFP_KERNEL);
3163                 if (!hwname)
3164                         return -ENOMEM;
3165                 param.hwname = hwname;
3166         }
3167
3168         if (info->attrs[HWSIM_ATTR_USE_CHANCTX])
3169                 param.use_chanctx = true;
3170         else
3171                 param.use_chanctx = (param.channels > 1);
3172
3173         if (info->attrs[HWSIM_ATTR_REG_HINT_ALPHA2])
3174                 param.reg_alpha2 =
3175                         nla_data(info->attrs[HWSIM_ATTR_REG_HINT_ALPHA2]);
3176
3177         if (info->attrs[HWSIM_ATTR_REG_CUSTOM_REG]) {
3178                 u32 idx = nla_get_u32(info->attrs[HWSIM_ATTR_REG_CUSTOM_REG]);
3179
3180                 if (idx >= ARRAY_SIZE(hwsim_world_regdom_custom)) {
3181                         kfree(hwname);
3182                         return -EINVAL;
3183                 }
3184                 param.regd = hwsim_world_regdom_custom[idx];
3185         }
3186
3187         ret = mac80211_hwsim_new_radio(info, &param);
3188         kfree(hwname);
3189         return ret;
3190 }
3191
3192 static int hwsim_del_radio_nl(struct sk_buff *msg, struct genl_info *info)
3193 {
3194         struct mac80211_hwsim_data *data;
3195         s64 idx = -1;
3196         const char *hwname = NULL;
3197
3198         if (info->attrs[HWSIM_ATTR_RADIO_ID]) {
3199                 idx = nla_get_u32(info->attrs[HWSIM_ATTR_RADIO_ID]);
3200         } else if (info->attrs[HWSIM_ATTR_RADIO_NAME]) {
3201                 hwname = kstrndup((char *)nla_data(info->attrs[HWSIM_ATTR_RADIO_NAME]),
3202                                   nla_len(info->attrs[HWSIM_ATTR_RADIO_NAME]),
3203                                   GFP_KERNEL);
3204                 if (!hwname)
3205                         return -ENOMEM;
3206         } else
3207                 return -EINVAL;
3208
3209         spin_lock_bh(&hwsim_radio_lock);
3210         list_for_each_entry(data, &hwsim_radios, list) {
3211                 if (idx >= 0) {
3212                         if (data->idx != idx)
3213                                 continue;
3214                 } else {
3215                         if (!hwname ||
3216                             strcmp(hwname, wiphy_name(data->hw->wiphy)))
3217                                 continue;
3218                 }
3219
3220                 if (!net_eq(wiphy_net(data->hw->wiphy), genl_info_net(info)))
3221                         continue;
3222
3223                 list_del(&data->list);
3224                 spin_unlock_bh(&hwsim_radio_lock);
3225                 mac80211_hwsim_del_radio(data, wiphy_name(data->hw->wiphy),
3226                                          info);
3227                 kfree(hwname);
3228                 return 0;
3229         }
3230         spin_unlock_bh(&hwsim_radio_lock);
3231
3232         kfree(hwname);
3233         return -ENODEV;
3234 }
3235
3236 static int hwsim_get_radio_nl(struct sk_buff *msg, struct genl_info *info)
3237 {
3238         struct mac80211_hwsim_data *data;
3239         struct sk_buff *skb;
3240         int idx, res = -ENODEV;
3241
3242         if (!info->attrs[HWSIM_ATTR_RADIO_ID])
3243                 return -EINVAL;
3244         idx = nla_get_u32(info->attrs[HWSIM_ATTR_RADIO_ID]);
3245
3246         spin_lock_bh(&hwsim_radio_lock);
3247         list_for_each_entry(data, &hwsim_radios, list) {
3248                 if (data->idx != idx)
3249                         continue;
3250
3251                 if (!net_eq(wiphy_net(data->hw->wiphy), genl_info_net(info)))
3252                         continue;
3253
3254                 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
3255                 if (!skb) {
3256                         res = -ENOMEM;
3257                         goto out_err;
3258                 }
3259
3260                 res = mac80211_hwsim_get_radio(skb, data, info->snd_portid,
3261                                                info->snd_seq, NULL, 0);
3262                 if (res < 0) {
3263                         nlmsg_free(skb);
3264                         goto out_err;
3265                 }
3266
3267                 res = genlmsg_reply(skb, info);
3268                 break;
3269         }
3270
3271 out_err:
3272         spin_unlock_bh(&hwsim_radio_lock);
3273
3274         return res;
3275 }
3276
3277 static int hwsim_dump_radio_nl(struct sk_buff *skb,
3278                                struct netlink_callback *cb)
3279 {
3280         int idx = cb->args[0];
3281         struct mac80211_hwsim_data *data = NULL;
3282         int res;
3283
3284         spin_lock_bh(&hwsim_radio_lock);
3285
3286         if (idx == hwsim_radio_idx)
3287                 goto done;
3288
3289         list_for_each_entry(data, &hwsim_radios, list) {
3290                 if (data->idx < idx)
3291                         continue;
3292
3293                 if (!net_eq(wiphy_net(data->hw->wiphy), sock_net(skb->sk)))
3294                         continue;
3295
3296                 res = mac80211_hwsim_get_radio(skb, data,
3297                                                NETLINK_CB(cb->skb).portid,
3298                                                cb->nlh->nlmsg_seq, cb,
3299                                                NLM_F_MULTI);
3300                 if (res < 0)
3301                         break;
3302
3303                 idx = data->idx + 1;
3304         }
3305
3306         cb->args[0] = idx;
3307
3308 done:
3309         spin_unlock_bh(&hwsim_radio_lock);
3310         return skb->len;
3311 }
3312
3313 /* Generic Netlink operations array */
3314 static const struct genl_ops hwsim_ops[] = {
3315         {
3316                 .cmd = HWSIM_CMD_REGISTER,
3317                 .policy = hwsim_genl_policy,
3318                 .doit = hwsim_register_received_nl,
3319                 .flags = GENL_UNS_ADMIN_PERM,
3320         },
3321         {
3322                 .cmd = HWSIM_CMD_FRAME,
3323                 .policy = hwsim_genl_policy,
3324                 .doit = hwsim_cloned_frame_received_nl,
3325         },
3326         {
3327                 .cmd = HWSIM_CMD_TX_INFO_FRAME,
3328                 .policy = hwsim_genl_policy,
3329                 .doit = hwsim_tx_info_frame_received_nl,
3330         },
3331         {
3332                 .cmd = HWSIM_CMD_NEW_RADIO,
3333                 .policy = hwsim_genl_policy,
3334                 .doit = hwsim_new_radio_nl,
3335                 .flags = GENL_UNS_ADMIN_PERM,
3336         },
3337         {
3338                 .cmd = HWSIM_CMD_DEL_RADIO,
3339                 .policy = hwsim_genl_policy,
3340                 .doit = hwsim_del_radio_nl,
3341                 .flags = GENL_UNS_ADMIN_PERM,
3342         },
3343         {
3344                 .cmd = HWSIM_CMD_GET_RADIO,
3345                 .policy = hwsim_genl_policy,
3346                 .doit = hwsim_get_radio_nl,
3347                 .dumpit = hwsim_dump_radio_nl,
3348         },
3349 };
3350
3351 static struct genl_family hwsim_genl_family __ro_after_init = {
3352         .name = "MAC80211_HWSIM",
3353         .version = 1,
3354         .maxattr = HWSIM_ATTR_MAX,
3355         .netnsok = true,
3356         .module = THIS_MODULE,
3357         .ops = hwsim_ops,
3358         .n_ops = ARRAY_SIZE(hwsim_ops),
3359         .mcgrps = hwsim_mcgrps,
3360         .n_mcgrps = ARRAY_SIZE(hwsim_mcgrps),
3361 };
3362
3363 static void destroy_radio(struct work_struct *work)
3364 {
3365         struct mac80211_hwsim_data *data =
3366                 container_of(work, struct mac80211_hwsim_data, destroy_work);
3367
3368         mac80211_hwsim_del_radio(data, wiphy_name(data->hw->wiphy), NULL);
3369 }
3370
3371 static void remove_user_radios(u32 portid)
3372 {
3373         struct mac80211_hwsim_data *entry, *tmp;
3374
3375         spin_lock_bh(&hwsim_radio_lock);
3376         list_for_each_entry_safe(entry, tmp, &hwsim_radios, list) {
3377                 if (entry->destroy_on_close && entry->portid == portid) {
3378                         list_del(&entry->list);
3379                         INIT_WORK(&entry->destroy_work, destroy_radio);
3380                         schedule_work(&entry->destroy_work);
3381                 }
3382         }
3383         spin_unlock_bh(&hwsim_radio_lock);
3384 }
3385
3386 static int mac80211_hwsim_netlink_notify(struct notifier_block *nb,
3387                                          unsigned long state,
3388                                          void *_notify)
3389 {
3390         struct netlink_notify *notify = _notify;
3391
3392         if (state != NETLINK_URELEASE)
3393                 return NOTIFY_DONE;
3394
3395         remove_user_radios(notify->portid);
3396
3397         if (notify->portid == hwsim_net_get_wmediumd(notify->net)) {
3398                 printk(KERN_INFO "mac80211_hwsim: wmediumd released netlink"
3399                        " socket, switching to perfect channel medium\n");
3400                 hwsim_register_wmediumd(notify->net, 0);
3401         }
3402         return NOTIFY_DONE;
3403
3404 }
3405
3406 static struct notifier_block hwsim_netlink_notifier = {
3407         .notifier_call = mac80211_hwsim_netlink_notify,
3408 };
3409
3410 static int __init hwsim_init_netlink(void)
3411 {
3412         int rc;
3413
3414         printk(KERN_INFO "mac80211_hwsim: initializing netlink\n");
3415
3416         rc = genl_register_family(&hwsim_genl_family);
3417         if (rc)
3418                 goto failure;
3419
3420         rc = netlink_register_notifier(&hwsim_netlink_notifier);
3421         if (rc) {
3422                 genl_unregister_family(&hwsim_genl_family);
3423                 goto failure;
3424         }
3425
3426         return 0;
3427
3428 failure:
3429         printk(KERN_DEBUG "mac80211_hwsim: error occurred in %s\n", __func__);
3430         return -EINVAL;
3431 }
3432
3433 static __net_init int hwsim_init_net(struct net *net)
3434 {
3435         hwsim_net_set_netgroup(net);
3436
3437         return 0;
3438 }
3439
3440 static void __net_exit hwsim_exit_net(struct net *net)
3441 {
3442         struct mac80211_hwsim_data *data, *tmp;
3443
3444         spin_lock_bh(&hwsim_radio_lock);
3445         list_for_each_entry_safe(data, tmp, &hwsim_radios, list) {
3446                 if (!net_eq(wiphy_net(data->hw->wiphy), net))
3447                         continue;
3448
3449                 /* Radios created in init_net are returned to init_net. */
3450                 if (data->netgroup == hwsim_net_get_netgroup(&init_net))
3451                         continue;
3452
3453                 list_del(&data->list);
3454                 spin_unlock_bh(&hwsim_radio_lock);
3455                 mac80211_hwsim_del_radio(data, wiphy_name(data->hw->wiphy),
3456                                          NULL);
3457                 spin_lock_bh(&hwsim_radio_lock);
3458
3459         }
3460         spin_unlock_bh(&hwsim_radio_lock);
3461 }
3462
3463 static struct pernet_operations hwsim_net_ops = {
3464         .init = hwsim_init_net,
3465         .exit = hwsim_exit_net,
3466         .id   = &hwsim_net_id,
3467         .size = sizeof(struct hwsim_net),
3468 };
3469
3470 static void hwsim_exit_netlink(void)
3471 {
3472         /* unregister the notifier */
3473         netlink_unregister_notifier(&hwsim_netlink_notifier);
3474         /* unregister the family */
3475         genl_unregister_family(&hwsim_genl_family);
3476 }
3477
3478 static int __init init_mac80211_hwsim(void)
3479 {
3480         int i, err;
3481
3482         if (radios < 0 || radios > 100)
3483                 return -EINVAL;
3484
3485         if (channels < 1)
3486                 return -EINVAL;
3487
3488         spin_lock_init(&hwsim_radio_lock);
3489
3490         err = register_pernet_device(&hwsim_net_ops);
3491         if (err)
3492                 return err;
3493
3494         err = platform_driver_register(&mac80211_hwsim_driver);
3495         if (err)
3496                 goto out_unregister_pernet;
3497
3498         err = hwsim_init_netlink();
3499         if (err)
3500                 goto out_unregister_driver;
3501
3502         hwsim_class = class_create(THIS_MODULE, "mac80211_hwsim");
3503         if (IS_ERR(hwsim_class)) {
3504                 err = PTR_ERR(hwsim_class);
3505                 goto out_exit_netlink;
3506         }
3507
3508         for (i = 0; i < radios; i++) {
3509                 struct hwsim_new_radio_params param = { 0 };
3510
3511                 param.channels = channels;
3512
3513                 switch (regtest) {
3514                 case HWSIM_REGTEST_DIFF_COUNTRY:
3515                         if (i < ARRAY_SIZE(hwsim_alpha2s))
3516                                 param.reg_alpha2 = hwsim_alpha2s[i];
3517                         break;
3518                 case HWSIM_REGTEST_DRIVER_REG_FOLLOW:
3519                         if (!i)
3520                                 param.reg_alpha2 = hwsim_alpha2s[0];
3521                         break;
3522                 case HWSIM_REGTEST_STRICT_ALL:
3523                         param.reg_strict = true;
3524                 case HWSIM_REGTEST_DRIVER_REG_ALL:
3525                         param.reg_alpha2 = hwsim_alpha2s[0];
3526                         break;
3527                 case HWSIM_REGTEST_WORLD_ROAM:
3528                         if (i == 0)
3529                                 param.regd = &hwsim_world_regdom_custom_01;
3530                         break;
3531                 case HWSIM_REGTEST_CUSTOM_WORLD:
3532                         param.regd = &hwsim_world_regdom_custom_01;
3533                         break;
3534                 case HWSIM_REGTEST_CUSTOM_WORLD_2:
3535                         if (i == 0)
3536                                 param.regd = &hwsim_world_regdom_custom_01;
3537                         else if (i == 1)
3538                                 param.regd = &hwsim_world_regdom_custom_02;
3539                         break;
3540                 case HWSIM_REGTEST_STRICT_FOLLOW:
3541                         if (i == 0) {
3542                                 param.reg_strict = true;
3543                                 param.reg_alpha2 = hwsim_alpha2s[0];
3544                         }
3545                         break;
3546                 case HWSIM_REGTEST_STRICT_AND_DRIVER_REG:
3547                         if (i == 0) {
3548                                 param.reg_strict = true;
3549                                 param.reg_alpha2 = hwsim_alpha2s[0];
3550                         } else if (i == 1) {
3551                                 param.reg_alpha2 = hwsim_alpha2s[1];
3552                         }
3553                         break;
3554                 case HWSIM_REGTEST_ALL:
3555                         switch (i) {
3556                         case 0:
3557                                 param.regd = &hwsim_world_regdom_custom_01;
3558                                 break;
3559                         case 1:
3560                                 param.regd = &hwsim_world_regdom_custom_02;
3561                                 break;
3562                         case 2:
3563                                 param.reg_alpha2 = hwsim_alpha2s[0];
3564                                 break;
3565                         case 3:
3566                                 param.reg_alpha2 = hwsim_alpha2s[1];
3567                                 break;
3568                         case 4:
3569                                 param.reg_strict = true;
3570                                 param.reg_alpha2 = hwsim_alpha2s[2];
3571                                 break;
3572                         }
3573                         break;
3574                 default:
3575                         break;
3576                 }
3577
3578                 param.p2p_device = support_p2p_device;
3579                 param.use_chanctx = channels > 1;
3580
3581                 err = mac80211_hwsim_new_radio(NULL, &param);
3582                 if (err < 0)
3583                         goto out_free_radios;
3584         }
3585
3586         hwsim_mon = alloc_netdev(0, "hwsim%d", NET_NAME_UNKNOWN,
3587                                  hwsim_mon_setup);
3588         if (hwsim_mon == NULL) {
3589                 err = -ENOMEM;
3590                 goto out_free_radios;
3591         }
3592
3593         rtnl_lock();
3594         err = dev_alloc_name(hwsim_mon, hwsim_mon->name);
3595         if (err < 0) {
3596                 rtnl_unlock();
3597                 goto out_free_radios;
3598         }
3599
3600         err = register_netdevice(hwsim_mon);
3601         if (err < 0) {
3602                 rtnl_unlock();
3603                 goto out_free_mon;
3604         }
3605         rtnl_unlock();
3606
3607         return 0;
3608
3609 out_free_mon:
3610         free_netdev(hwsim_mon);
3611 out_free_radios:
3612         mac80211_hwsim_free();
3613 out_exit_netlink:
3614         hwsim_exit_netlink();
3615 out_unregister_driver:
3616         platform_driver_unregister(&mac80211_hwsim_driver);
3617 out_unregister_pernet:
3618         unregister_pernet_device(&hwsim_net_ops);
3619         return err;
3620 }
3621 module_init(init_mac80211_hwsim);
3622
3623 static void __exit exit_mac80211_hwsim(void)
3624 {
3625         printk(KERN_DEBUG "mac80211_hwsim: unregister radios\n");
3626
3627         hwsim_exit_netlink();
3628
3629         mac80211_hwsim_free();
3630         unregister_netdev(hwsim_mon);
3631         platform_driver_unregister(&mac80211_hwsim_driver);
3632         unregister_pernet_device(&hwsim_net_ops);
3633 }
3634 module_exit(exit_mac80211_hwsim);