kernel/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 "mac80211_hwsim.h"
  34
  35 #define WARN_QUEUE 100
  36 #define MAX_QUEUE 200
  37
  38 MODULE_AUTHOR("Jouni Malinen");
  39 MODULE_DESCRIPTION("Software simulator of 802.11 radio(s) for mac80211");
  40 MODULE_LICENSE("GPL");
  41
  42 static u32 wmediumd_portid;
  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 struct class *hwsim_class;
 254
 255 static struct net_device *hwsim_mon; /* global monitor netdev */
 256
 257 #define CHAN2G(_freq)  { \
 258         .band = IEEE80211_BAND_2GHZ, \
 259         .center_freq = (_freq), \
 260         .hw_value = (_freq), \
 261         .max_power = 20, \
 262 }
 263
 264 #define CHAN5G(_freq) { \
 265         .band = IEEE80211_BAND_5GHZ, \
 266         .center_freq = (_freq), \
 267         .hw_value = (_freq), \
 268         .max_power = 20, \
 269 }
 270
 271 static const struct ieee80211_channel hwsim_channels_2ghz[] = {
 272         CHAN2G(2412), /* Channel 1 */
 273         CHAN2G(2417), /* Channel 2 */
 274         CHAN2G(2422), /* Channel 3 */
 275         CHAN2G(2427), /* Channel 4 */
 276         CHAN2G(2432), /* Channel 5 */
 277         CHAN2G(2437), /* Channel 6 */
 278         CHAN2G(2442), /* Channel 7 */
 279         CHAN2G(2447), /* Channel 8 */
 280         CHAN2G(2452), /* Channel 9 */
 281         CHAN2G(2457), /* Channel 10 */
 282         CHAN2G(2462), /* Channel 11 */
 283         CHAN2G(2467), /* Channel 12 */
 284         CHAN2G(2472), /* Channel 13 */
 285         CHAN2G(2484), /* Channel 14 */
 286 };
 287
 288 static const struct ieee80211_channel hwsim_channels_5ghz[] = {
 289         CHAN5G(5180), /* Channel 36 */
 290         CHAN5G(5200), /* Channel 40 */
 291         CHAN5G(5220), /* Channel 44 */
 292         CHAN5G(5240), /* Channel 48 */
 293
 294         CHAN5G(5260), /* Channel 52 */
 295         CHAN5G(5280), /* Channel 56 */
 296         CHAN5G(5300), /* Channel 60 */
 297         CHAN5G(5320), /* Channel 64 */
 298
 299         CHAN5G(5500), /* Channel 100 */
 300         CHAN5G(5520), /* Channel 104 */
 301         CHAN5G(5540), /* Channel 108 */
 302         CHAN5G(5560), /* Channel 112 */
 303         CHAN5G(5580), /* Channel 116 */
 304         CHAN5G(5600), /* Channel 120 */
 305         CHAN5G(5620), /* Channel 124 */
 306         CHAN5G(5640), /* Channel 128 */
 307         CHAN5G(5660), /* Channel 132 */
 308         CHAN5G(5680), /* Channel 136 */
 309         CHAN5G(5700), /* Channel 140 */
 310
 311         CHAN5G(5745), /* Channel 149 */
 312         CHAN5G(5765), /* Channel 153 */
 313         CHAN5G(5785), /* Channel 157 */
 314         CHAN5G(5805), /* Channel 161 */
 315         CHAN5G(5825), /* Channel 165 */
 316 };
 317
 318 static const struct ieee80211_rate hwsim_rates[] = {
 319         { .bitrate = 10 },
 320         { .bitrate = 20, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
 321         { .bitrate = 55, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
 322         { .bitrate = 110, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
 323         { .bitrate = 60 },
 324         { .bitrate = 90 },
 325         { .bitrate = 120 },
 326         { .bitrate = 180 },
 327         { .bitrate = 240 },
 328         { .bitrate = 360 },
 329         { .bitrate = 480 },
 330         { .bitrate = 540 }
 331 };
 332
 333 #define OUI_QCA 0x001374
 334 #define QCA_NL80211_SUBCMD_TEST 1
 335 enum qca_nl80211_vendor_subcmds {
 336         QCA_WLAN_VENDOR_ATTR_TEST = 8,
 337         QCA_WLAN_VENDOR_ATTR_MAX = QCA_WLAN_VENDOR_ATTR_TEST
 338 };
 339
 340 static const struct nla_policy
 341 hwsim_vendor_test_policy[QCA_WLAN_VENDOR_ATTR_MAX + 1] = {
 342         [QCA_WLAN_VENDOR_ATTR_MAX] = { .type = NLA_U32 },
 343 };
 344
 345 static int mac80211_hwsim_vendor_cmd_test(struct wiphy *wiphy,
 346                                           struct wireless_dev *wdev,
 347                                           const void *data, int data_len)
 348 {
 349         struct sk_buff *skb;
 350         struct nlattr *tb[QCA_WLAN_VENDOR_ATTR_MAX + 1];
 351         int err;
 352         u32 val;
 353
 354         err = nla_parse(tb, QCA_WLAN_VENDOR_ATTR_MAX, data, data_len,
 355                         hwsim_vendor_test_policy);
 356         if (err)
 357                 return err;
 358         if (!tb[QCA_WLAN_VENDOR_ATTR_TEST])
 359                 return -EINVAL;
 360         val = nla_get_u32(tb[QCA_WLAN_VENDOR_ATTR_TEST]);
 361         wiphy_debug(wiphy, "%s: test=%u\n", __func__, val);
 362
 363         /* Send a vendor event as a test. Note that this would not normally be
 364          * done within a command handler, but rather, based on some other
 365          * trigger. For simplicity, this command is used to trigger the event
 366          * here.
 367          *
 368          * event_idx = 0 (index in mac80211_hwsim_vendor_commands)
 369          */
 370         skb = cfg80211_vendor_event_alloc(wiphy, wdev, 100, 0, GFP_KERNEL);
 371         if (skb) {
 372                 /* skb_put() or nla_put() will fill up data within
 373                  * NL80211_ATTR_VENDOR_DATA.
 374                  */
 375
 376                 /* Add vendor data */
 377                 nla_put_u32(skb, QCA_WLAN_VENDOR_ATTR_TEST, val + 1);
 378
 379                 /* Send the event - this will call nla_nest_end() */
 380                 cfg80211_vendor_event(skb, GFP_KERNEL);
 381         }
 382
 383         /* Send a response to the command */
 384         skb = cfg80211_vendor_cmd_alloc_reply_skb(wiphy, 10);
 385         if (!skb)
 386                 return -ENOMEM;
 387
 388         /* skb_put() or nla_put() will fill up data within
 389          * NL80211_ATTR_VENDOR_DATA
 390          */
 391         nla_put_u32(skb, QCA_WLAN_VENDOR_ATTR_TEST, val + 2);
 392
 393         return cfg80211_vendor_cmd_reply(skb);
 394 }
 395
 396 static struct wiphy_vendor_command mac80211_hwsim_vendor_commands[] = {
 397         {
 398                 .info = { .vendor_id = OUI_QCA,
 399                           .subcmd = QCA_NL80211_SUBCMD_TEST },
 400                 .flags = WIPHY_VENDOR_CMD_NEED_NETDEV,
 401                 .doit = mac80211_hwsim_vendor_cmd_test,
 402         }
 403 };
 404
 405 /* Advertise support vendor specific events */
 406 static const struct nl80211_vendor_cmd_info mac80211_hwsim_vendor_events[] = {
 407         { .vendor_id = OUI_QCA, .subcmd = 1 },
 408 };
 409
 410 static const struct ieee80211_iface_limit hwsim_if_limits[] = {
 411         { .max = 1, .types = BIT(NL80211_IFTYPE_ADHOC) },
 412         { .max = 2048,  .types = BIT(NL80211_IFTYPE_STATION) |
 413                                  BIT(NL80211_IFTYPE_P2P_CLIENT) |
 414 #ifdef CONFIG_MAC80211_MESH
 415                                  BIT(NL80211_IFTYPE_MESH_POINT) |
 416 #endif
 417                                  BIT(NL80211_IFTYPE_AP) |
 418                                  BIT(NL80211_IFTYPE_P2P_GO) },
 419         /* must be last, see hwsim_if_comb */
 420         { .max = 1, .types = BIT(NL80211_IFTYPE_P2P_DEVICE) }
 421 };
 422
 423 static const struct ieee80211_iface_limit hwsim_if_dfs_limits[] = {
 424         { .max = 8, .types = BIT(NL80211_IFTYPE_AP) },
 425 };
 426
 427 static const struct ieee80211_iface_combination hwsim_if_comb[] = {
 428         {
 429                 .limits = hwsim_if_limits,
 430                 /* remove the last entry which is P2P_DEVICE */
 431                 .n_limits = ARRAY_SIZE(hwsim_if_limits) - 1,
 432                 .max_interfaces = 2048,
 433                 .num_different_channels = 1,
 434         },
 435         {
 436                 .limits = hwsim_if_dfs_limits,
 437                 .n_limits = ARRAY_SIZE(hwsim_if_dfs_limits),
 438                 .max_interfaces = 8,
 439                 .num_different_channels = 1,
 440                 .radar_detect_widths = BIT(NL80211_CHAN_WIDTH_20_NOHT) |
 441                                        BIT(NL80211_CHAN_WIDTH_20) |
 442                                        BIT(NL80211_CHAN_WIDTH_40) |
 443                                        BIT(NL80211_CHAN_WIDTH_80) |
 444                                        BIT(NL80211_CHAN_WIDTH_160),
 445         }
 446 };
 447
 448 static const struct ieee80211_iface_combination hwsim_if_comb_p2p_dev[] = {
 449         {
 450                 .limits = hwsim_if_limits,
 451                 .n_limits = ARRAY_SIZE(hwsim_if_limits),
 452                 .max_interfaces = 2048,
 453                 .num_different_channels = 1,
 454         },
 455         {
 456                 .limits = hwsim_if_dfs_limits,
 457                 .n_limits = ARRAY_SIZE(hwsim_if_dfs_limits),
 458                 .max_interfaces = 8,
 459                 .num_different_channels = 1,
 460                 .radar_detect_widths = BIT(NL80211_CHAN_WIDTH_20_NOHT) |
 461                                        BIT(NL80211_CHAN_WIDTH_20) |
 462                                        BIT(NL80211_CHAN_WIDTH_40) |
 463                                        BIT(NL80211_CHAN_WIDTH_80) |
 464                                        BIT(NL80211_CHAN_WIDTH_160),
 465         }
 466 };
 467
 468 static spinlock_t hwsim_radio_lock;
 469 static struct list_head hwsim_radios;
 470 static int hwsim_radio_idx;
 471
 472 static struct platform_driver mac80211_hwsim_driver = {
 473         .driver = {
 474                 .name = "mac80211_hwsim",
 475         },
 476 };
 477
 478 struct mac80211_hwsim_data {
 479         struct list_head list;
 480         struct ieee80211_hw *hw;
 481         struct device *dev;
 482         struct ieee80211_supported_band bands[IEEE80211_NUM_BANDS];
 483         struct ieee80211_channel channels_2ghz[ARRAY_SIZE(hwsim_channels_2ghz)];
 484         struct ieee80211_channel channels_5ghz[ARRAY_SIZE(hwsim_channels_5ghz)];
 485         struct ieee80211_rate rates[ARRAY_SIZE(hwsim_rates)];
 486         struct ieee80211_iface_combination if_combination;
 487
 488         struct mac_address addresses[2];
 489         int channels, idx;
 490         bool use_chanctx;
 491         bool destroy_on_close;
 492         struct work_struct destroy_work;
 493         u32 portid;
 494         char alpha2[2];
 495         const struct ieee80211_regdomain *regd;
 496
 497         struct ieee80211_channel *tmp_chan;
 498         struct delayed_work roc_done;
 499         struct delayed_work hw_scan;
 500         struct cfg80211_scan_request *hw_scan_request;
 501         struct ieee80211_vif *hw_scan_vif;
 502         int scan_chan_idx;
 503         u8 scan_addr[ETH_ALEN];
 504
 505         struct ieee80211_channel *channel;
 506         u64 beacon_int  /* beacon interval in us */;
 507         unsigned int rx_filter;
 508         bool started, idle, scanning;
 509         struct mutex mutex;
 510         struct tasklet_hrtimer beacon_timer;
 511         enum ps_mode {
 512                 PS_DISABLED, PS_ENABLED, PS_AUTO_POLL, PS_MANUAL_POLL
 513         } ps;
 514         bool ps_poll_pending;
 515         struct dentry *debugfs;
 516
 517         struct sk_buff_head pending;    /* packets pending */
 518         /*
 519          * Only radios in the same group can communicate together (the
 520          * channel has to match too). Each bit represents a group. A
 521          * radio can be in more than one group.
 522          */
 523         u64 group;
 524
 525         int power_level;
 526
 527         /* difference between this hw's clock and the real clock, in usecs */
 528         s64 tsf_offset;
 529         s64 bcn_delta;
 530         /* absolute beacon transmission time. Used to cover up "tx" delay. */
 531         u64 abs_bcn_ts;
 532
 533         /* Stats */
 534         u64 tx_pkts;
 535         u64 rx_pkts;
 536         u64 tx_bytes;
 537         u64 rx_bytes;
 538         u64 tx_dropped;
 539         u64 tx_failed;
 540 };
 541
 542
 543 struct hwsim_radiotap_hdr {
 544         struct ieee80211_radiotap_header hdr;
 545         __le64 rt_tsft;
 546         u8 rt_flags;
 547         u8 rt_rate;
 548         __le16 rt_channel;
 549         __le16 rt_chbitmask;
 550 } __packed;
 551
 552 struct hwsim_radiotap_ack_hdr {
 553         struct ieee80211_radiotap_header hdr;
 554         u8 rt_flags;
 555         u8 pad;
 556         __le16 rt_channel;
 557         __le16 rt_chbitmask;
 558 } __packed;
 559
 560 /* MAC80211_HWSIM netlinf family */
 561 static struct genl_family hwsim_genl_family = {
 562         .id = GENL_ID_GENERATE,
 563         .hdrsize = 0,
 564         .name = "MAC80211_HWSIM",
 565         .version = 1,
 566         .maxattr = HWSIM_ATTR_MAX,
 567 };
 568
 569 enum hwsim_multicast_groups {
 570         HWSIM_MCGRP_CONFIG,
 571 };
 572
 573 static const struct genl_multicast_group hwsim_mcgrps[] = {
 574         [HWSIM_MCGRP_CONFIG] = { .name = "config", },
 575 };
 576
 577 /* MAC80211_HWSIM netlink policy */
 578
 579 static const struct nla_policy hwsim_genl_policy[HWSIM_ATTR_MAX + 1] = {
 580         [HWSIM_ATTR_ADDR_RECEIVER] = { .type = NLA_UNSPEC, .len = ETH_ALEN },
 581         [HWSIM_ATTR_ADDR_TRANSMITTER] = { .type = NLA_UNSPEC, .len = ETH_ALEN },
 582         [HWSIM_ATTR_FRAME] = { .type = NLA_BINARY,
 583                                .len = IEEE80211_MAX_DATA_LEN },
 584         [HWSIM_ATTR_FLAGS] = { .type = NLA_U32 },
 585         [HWSIM_ATTR_RX_RATE] = { .type = NLA_U32 },
 586         [HWSIM_ATTR_SIGNAL] = { .type = NLA_U32 },
 587         [HWSIM_ATTR_TX_INFO] = { .type = NLA_UNSPEC,
 588                                  .len = IEEE80211_TX_MAX_RATES *
 589                                         sizeof(struct hwsim_tx_rate)},
 590         [HWSIM_ATTR_COOKIE] = { .type = NLA_U64 },
 591         [HWSIM_ATTR_CHANNELS] = { .type = NLA_U32 },
 592         [HWSIM_ATTR_RADIO_ID] = { .type = NLA_U32 },
 593         [HWSIM_ATTR_REG_HINT_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 594         [HWSIM_ATTR_REG_CUSTOM_REG] = { .type = NLA_U32 },
 595         [HWSIM_ATTR_REG_STRICT_REG] = { .type = NLA_FLAG },
 596         [HWSIM_ATTR_SUPPORT_P2P_DEVICE] = { .type = NLA_FLAG },
 597         [HWSIM_ATTR_DESTROY_RADIO_ON_CLOSE] = { .type = NLA_FLAG },
 598         [HWSIM_ATTR_RADIO_NAME] = { .type = NLA_STRING },
 599         [HWSIM_ATTR_NO_VIF] = { .type = NLA_FLAG },
 600         [HWSIM_ATTR_FREQ] = { .type = NLA_U32 },
 601 };
 602
 603 static void mac80211_hwsim_tx_frame(struct ieee80211_hw *hw,
 604                                     struct sk_buff *skb,
 605                                     struct ieee80211_channel *chan);
 606
 607 /* sysfs attributes */
 608 static void hwsim_send_ps_poll(void *dat, u8 *mac, struct ieee80211_vif *vif)
 609 {
 610         struct mac80211_hwsim_data *data = dat;
 611         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 612         struct sk_buff *skb;
 613         struct ieee80211_pspoll *pspoll;
 614
 615         if (!vp->assoc)
 616                 return;
 617
 618         wiphy_debug(data->hw->wiphy,
 619                     "%s: send PS-Poll to %pM for aid %d\n",
 620                     __func__, vp->bssid, vp->aid);
 621
 622         skb = dev_alloc_skb(sizeof(*pspoll));
 623         if (!skb)
 624                 return;
 625         pspoll = (void *) skb_put(skb, sizeof(*pspoll));
 626         pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
 627                                             IEEE80211_STYPE_PSPOLL |
 628                                             IEEE80211_FCTL_PM);
 629         pspoll->aid = cpu_to_le16(0xc000 | vp->aid);
 630         memcpy(pspoll->bssid, vp->bssid, ETH_ALEN);
 631         memcpy(pspoll->ta, mac, ETH_ALEN);
 632
 633         rcu_read_lock();
 634         mac80211_hwsim_tx_frame(data->hw, skb,
 635                                 rcu_dereference(vif->chanctx_conf)->def.chan);
 636         rcu_read_unlock();
 637 }
 638
 639 static void hwsim_send_nullfunc(struct mac80211_hwsim_data *data, u8 *mac,
 640                                 struct ieee80211_vif *vif, int ps)
 641 {
 642         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 643         struct sk_buff *skb;
 644         struct ieee80211_hdr *hdr;
 645
 646         if (!vp->assoc)
 647                 return;
 648
 649         wiphy_debug(data->hw->wiphy,
 650                     "%s: send data::nullfunc to %pM ps=%d\n",
 651                     __func__, vp->bssid, ps);
 652
 653         skb = dev_alloc_skb(sizeof(*hdr));
 654         if (!skb)
 655                 return;
 656         hdr = (void *) skb_put(skb, sizeof(*hdr) - ETH_ALEN);
 657         hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
 658                                          IEEE80211_STYPE_NULLFUNC |
 659                                          (ps ? IEEE80211_FCTL_PM : 0));
 660         hdr->duration_id = cpu_to_le16(0);
 661         memcpy(hdr->addr1, vp->bssid, ETH_ALEN);
 662         memcpy(hdr->addr2, mac, ETH_ALEN);
 663         memcpy(hdr->addr3, vp->bssid, ETH_ALEN);
 664
 665         rcu_read_lock();
 666         mac80211_hwsim_tx_frame(data->hw, skb,
 667                                 rcu_dereference(vif->chanctx_conf)->def.chan);
 668         rcu_read_unlock();
 669 }
 670
 671
 672 static void hwsim_send_nullfunc_ps(void *dat, u8 *mac,
 673                                    struct ieee80211_vif *vif)
 674 {
 675         struct mac80211_hwsim_data *data = dat;
 676         hwsim_send_nullfunc(data, mac, vif, 1);
 677 }
 678
 679 static void hwsim_send_nullfunc_no_ps(void *dat, u8 *mac,
 680                                       struct ieee80211_vif *vif)
 681 {
 682         struct mac80211_hwsim_data *data = dat;
 683         hwsim_send_nullfunc(data, mac, vif, 0);
 684 }
 685
 686 static int hwsim_fops_ps_read(void *dat, u64 *val)
 687 {
 688         struct mac80211_hwsim_data *data = dat;
 689         *val = data->ps;
 690         return 0;
 691 }
 692
 693 static int hwsim_fops_ps_write(void *dat, u64 val)
 694 {
 695         struct mac80211_hwsim_data *data = dat;
 696         enum ps_mode old_ps;
 697
 698         if (val != PS_DISABLED && val != PS_ENABLED && val != PS_AUTO_POLL &&
 699             val != PS_MANUAL_POLL)
 700                 return -EINVAL;
 701
 702         old_ps = data->ps;
 703         data->ps = val;
 704
 705         local_bh_disable();
 706         if (val == PS_MANUAL_POLL) {
 707                 ieee80211_iterate_active_interfaces_atomic(
 708                         data->hw, IEEE80211_IFACE_ITER_NORMAL,
 709                         hwsim_send_ps_poll, data);
 710                 data->ps_poll_pending = true;
 711         } else if (old_ps == PS_DISABLED && val != PS_DISABLED) {
 712                 ieee80211_iterate_active_interfaces_atomic(
 713                         data->hw, IEEE80211_IFACE_ITER_NORMAL,
 714                         hwsim_send_nullfunc_ps, data);
 715         } else if (old_ps != PS_DISABLED && val == PS_DISABLED) {
 716                 ieee80211_iterate_active_interfaces_atomic(
 717                         data->hw, IEEE80211_IFACE_ITER_NORMAL,
 718                         hwsim_send_nullfunc_no_ps, data);
 719         }
 720         local_bh_enable();
 721
 722         return 0;
 723 }
 724
 725 DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_ps, hwsim_fops_ps_read, hwsim_fops_ps_write,
 726                         "%llu\n");
 727
 728 static int hwsim_write_simulate_radar(void *dat, u64 val)
 729 {
 730         struct mac80211_hwsim_data *data = dat;
 731
 732         ieee80211_radar_detected(data->hw);
 733
 734         return 0;
 735 }
 736
 737 DEFINE_SIMPLE_ATTRIBUTE(hwsim_simulate_radar, NULL,
 738                         hwsim_write_simulate_radar, "%llu\n");
 739
 740 static int hwsim_fops_group_read(void *dat, u64 *val)
 741 {
 742         struct mac80211_hwsim_data *data = dat;
 743         *val = data->group;
 744         return 0;
 745 }
 746
 747 static int hwsim_fops_group_write(void *dat, u64 val)
 748 {
 749         struct mac80211_hwsim_data *data = dat;
 750         data->group = val;
 751         return 0;
 752 }
 753
 754 DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_group,
 755                         hwsim_fops_group_read, hwsim_fops_group_write,
 756                         "%llx\n");
 757
 758 static netdev_tx_t hwsim_mon_xmit(struct sk_buff *skb,
 759                                         struct net_device *dev)
 760 {
 761         /* TODO: allow packet injection */
 762         dev_kfree_skb(skb);
 763         return NETDEV_TX_OK;
 764 }
 765
 766 static inline u64 mac80211_hwsim_get_tsf_raw(void)
 767 {
 768         return ktime_to_us(ktime_get_real());
 769 }
 770
 771 static __le64 __mac80211_hwsim_get_tsf(struct mac80211_hwsim_data *data)
 772 {
 773         u64 now = mac80211_hwsim_get_tsf_raw();
 774         return cpu_to_le64(now + data->tsf_offset);
 775 }
 776
 777 static u64 mac80211_hwsim_get_tsf(struct ieee80211_hw *hw,
 778                                   struct ieee80211_vif *vif)
 779 {
 780         struct mac80211_hwsim_data *data = hw->priv;
 781         return le64_to_cpu(__mac80211_hwsim_get_tsf(data));
 782 }
 783
 784 static void mac80211_hwsim_set_tsf(struct ieee80211_hw *hw,
 785                 struct ieee80211_vif *vif, u64 tsf)
 786 {
 787         struct mac80211_hwsim_data *data = hw->priv;
 788         u64 now = mac80211_hwsim_get_tsf(hw, vif);
 789         u32 bcn_int = data->beacon_int;
 790         u64 delta = abs64(tsf - now);
 791
 792         /* adjust after beaconing with new timestamp at old TBTT */
 793         if (tsf > now) {
 794                 data->tsf_offset += delta;
 795                 data->bcn_delta = do_div(delta, bcn_int);
 796         } else {
 797                 data->tsf_offset -= delta;
 798                 data->bcn_delta = -do_div(delta, bcn_int);
 799         }
 800 }
 801
 802 static void mac80211_hwsim_monitor_rx(struct ieee80211_hw *hw,
 803                                       struct sk_buff *tx_skb,
 804                                       struct ieee80211_channel *chan)
 805 {
 806         struct mac80211_hwsim_data *data = hw->priv;
 807         struct sk_buff *skb;
 808         struct hwsim_radiotap_hdr *hdr;
 809         u16 flags;
 810         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_skb);
 811         struct ieee80211_rate *txrate = ieee80211_get_tx_rate(hw, info);
 812
 813         if (!netif_running(hwsim_mon))
 814                 return;
 815
 816         skb = skb_copy_expand(tx_skb, sizeof(*hdr), 0, GFP_ATOMIC);
 817         if (skb == NULL)
 818                 return;
 819
 820         hdr = (struct hwsim_radiotap_hdr *) skb_push(skb, sizeof(*hdr));
 821         hdr->hdr.it_version = PKTHDR_RADIOTAP_VERSION;
 822         hdr->hdr.it_pad = 0;
 823         hdr->hdr.it_len = cpu_to_le16(sizeof(*hdr));
 824         hdr->hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
 825                                           (1 << IEEE80211_RADIOTAP_RATE) |
 826                                           (1 << IEEE80211_RADIOTAP_TSFT) |
 827                                           (1 << IEEE80211_RADIOTAP_CHANNEL));
 828         hdr->rt_tsft = __mac80211_hwsim_get_tsf(data);
 829         hdr->rt_flags = 0;
 830         hdr->rt_rate = txrate->bitrate / 5;
 831         hdr->rt_channel = cpu_to_le16(chan->center_freq);
 832         flags = IEEE80211_CHAN_2GHZ;
 833         if (txrate->flags & IEEE80211_RATE_ERP_G)
 834                 flags |= IEEE80211_CHAN_OFDM;
 835         else
 836                 flags |= IEEE80211_CHAN_CCK;
 837         hdr->rt_chbitmask = cpu_to_le16(flags);
 838
 839         skb->dev = hwsim_mon;
 840         skb_set_mac_header(skb, 0);
 841         skb->ip_summed = CHECKSUM_UNNECESSARY;
 842         skb->pkt_type = PACKET_OTHERHOST;
 843         skb->protocol = htons(ETH_P_802_2);
 844         memset(skb->cb, 0, sizeof(skb->cb));
 845         netif_rx(skb);
 846 }
 847
 848
 849 static void mac80211_hwsim_monitor_ack(struct ieee80211_channel *chan,
 850                                        const u8 *addr)
 851 {
 852         struct sk_buff *skb;
 853         struct hwsim_radiotap_ack_hdr *hdr;
 854         u16 flags;
 855         struct ieee80211_hdr *hdr11;
 856
 857         if (!netif_running(hwsim_mon))
 858                 return;
 859
 860         skb = dev_alloc_skb(100);
 861         if (skb == NULL)
 862                 return;
 863
 864         hdr = (struct hwsim_radiotap_ack_hdr *) skb_put(skb, sizeof(*hdr));
 865         hdr->hdr.it_version = PKTHDR_RADIOTAP_VERSION;
 866         hdr->hdr.it_pad = 0;
 867         hdr->hdr.it_len = cpu_to_le16(sizeof(*hdr));
 868         hdr->hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
 869                                           (1 << IEEE80211_RADIOTAP_CHANNEL));
 870         hdr->rt_flags = 0;
 871         hdr->pad = 0;
 872         hdr->rt_channel = cpu_to_le16(chan->center_freq);
 873         flags = IEEE80211_CHAN_2GHZ;
 874         hdr->rt_chbitmask = cpu_to_le16(flags);
 875
 876         hdr11 = (struct ieee80211_hdr *) skb_put(skb, 10);
 877         hdr11->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
 878                                            IEEE80211_STYPE_ACK);
 879         hdr11->duration_id = cpu_to_le16(0);
 880         memcpy(hdr11->addr1, addr, ETH_ALEN);
 881
 882         skb->dev = hwsim_mon;
 883         skb_set_mac_header(skb, 0);
 884         skb->ip_summed = CHECKSUM_UNNECESSARY;
 885         skb->pkt_type = PACKET_OTHERHOST;
 886         skb->protocol = htons(ETH_P_802_2);
 887         memset(skb->cb, 0, sizeof(skb->cb));
 888         netif_rx(skb);
 889 }
 890
 891 struct mac80211_hwsim_addr_match_data {
 892         u8 addr[ETH_ALEN];
 893         bool ret;
 894 };
 895
 896 static void mac80211_hwsim_addr_iter(void *data, u8 *mac,
 897                                      struct ieee80211_vif *vif)
 898 {
 899         struct mac80211_hwsim_addr_match_data *md = data;
 900
 901         if (memcmp(mac, md->addr, ETH_ALEN) == 0)
 902                 md->ret = true;
 903 }
 904
 905 static bool mac80211_hwsim_addr_match(struct mac80211_hwsim_data *data,
 906                                       const u8 *addr)
 907 {
 908         struct mac80211_hwsim_addr_match_data md = {
 909                 .ret = false,
 910         };
 911
 912         if (data->scanning && memcmp(addr, data->scan_addr, ETH_ALEN) == 0)
 913                 return true;
 914
 915         memcpy(md.addr, addr, ETH_ALEN);
 916
 917         ieee80211_iterate_active_interfaces_atomic(data->hw,
 918                                                    IEEE80211_IFACE_ITER_NORMAL,
 919                                                    mac80211_hwsim_addr_iter,
 920                                                    &md);
 921
 922         return md.ret;
 923 }
 924
 925 static bool hwsim_ps_rx_ok(struct mac80211_hwsim_data *data,
 926                            struct sk_buff *skb)
 927 {
 928         switch (data->ps) {
 929         case PS_DISABLED:
 930                 return true;
 931         case PS_ENABLED:
 932                 return false;
 933         case PS_AUTO_POLL:
 934                 /* TODO: accept (some) Beacons by default and other frames only
 935                  * if pending PS-Poll has been sent */
 936                 return true;
 937         case PS_MANUAL_POLL:
 938                 /* Allow unicast frames to own address if there is a pending
 939                  * PS-Poll */
 940                 if (data->ps_poll_pending &&
 941                     mac80211_hwsim_addr_match(data, skb->data + 4)) {
 942                         data->ps_poll_pending = false;
 943                         return true;
 944                 }
 945                 return false;
 946         }
 947
 948         return true;
 949 }
 950
 951 static void mac80211_hwsim_tx_frame_nl(struct ieee80211_hw *hw,
 952                                        struct sk_buff *my_skb,
 953                                        int dst_portid)
 954 {
 955         struct sk_buff *skb;
 956         struct mac80211_hwsim_data *data = hw->priv;
 957         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) my_skb->data;
 958         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(my_skb);
 959         void *msg_head;
 960         unsigned int hwsim_flags = 0;
 961         int i;
 962         struct hwsim_tx_rate tx_attempts[IEEE80211_TX_MAX_RATES];
 963
 964         if (data->ps != PS_DISABLED)
 965                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 966         /* If the queue contains MAX_QUEUE skb's drop some */
 967         if (skb_queue_len(&data->pending) >= MAX_QUEUE) {
 968                 /* Droping until WARN_QUEUE level */
 969                 while (skb_queue_len(&data->pending) >= WARN_QUEUE) {
 970                         ieee80211_free_txskb(hw, skb_dequeue(&data->pending));
 971                         data->tx_dropped++;
 972                 }
 973         }
 974
 975         skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_ATOMIC);
 976         if (skb == NULL)
 977                 goto nla_put_failure;
 978
 979         msg_head = genlmsg_put(skb, 0, 0, &hwsim_genl_family, 0,
 980                                HWSIM_CMD_FRAME);
 981         if (msg_head == NULL) {
 982                 printk(KERN_DEBUG "mac80211_hwsim: problem with msg_head\n");
 983                 goto nla_put_failure;
 984         }
 985
 986         if (nla_put(skb, HWSIM_ATTR_ADDR_TRANSMITTER, ETH_ALEN, hdr->addr2))
 987                 goto nla_put_failure;
 988
 989         /* We get the skb->data */
 990         if (nla_put(skb, HWSIM_ATTR_FRAME, my_skb->len, my_skb->data))
 991                 goto nla_put_failure;
 992
 993         /* We get the flags for this transmission, and we translate them to
 994            wmediumd flags  */
 995
 996         if (info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS)
 997                 hwsim_flags |= HWSIM_TX_CTL_REQ_TX_STATUS;
 998
 999         if (info->flags & IEEE80211_TX_CTL_NO_ACK)
1000                 hwsim_flags |= HWSIM_TX_CTL_NO_ACK;
1001
1002         if (nla_put_u32(skb, HWSIM_ATTR_FLAGS, hwsim_flags))
1003                 goto nla_put_failure;
1004
1005         if (nla_put_u32(skb, HWSIM_ATTR_FREQ, data->channel->center_freq))
1006                 goto nla_put_failure;
1007
1008         /* We get the tx control (rate and retries) info*/
1009
1010         for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
1011                 tx_attempts[i].idx = info->status.rates[i].idx;
1012                 tx_attempts[i].count = info->status.rates[i].count;
1013         }
1014
1015         if (nla_put(skb, HWSIM_ATTR_TX_INFO,
1016                     sizeof(struct hwsim_tx_rate)*IEEE80211_TX_MAX_RATES,
1017                     tx_attempts))
1018                 goto nla_put_failure;
1019
1020         /* We create a cookie to identify this skb */
1021         if (nla_put_u64(skb, HWSIM_ATTR_COOKIE, (unsigned long) my_skb))
1022                 goto nla_put_failure;
1023
1024         genlmsg_end(skb, msg_head);
1025         if (genlmsg_unicast(&init_net, skb, dst_portid))
1026                 goto err_free_txskb;
1027
1028         /* Enqueue the packet */
1029         skb_queue_tail(&data->pending, my_skb);
1030         data->tx_pkts++;
1031         data->tx_bytes += my_skb->len;
1032         return;
1033
1034 nla_put_failure:
1035         nlmsg_free(skb);
1036 err_free_txskb:
1037         printk(KERN_DEBUG "mac80211_hwsim: error occurred in %s\n", __func__);
1038         ieee80211_free_txskb(hw, my_skb);
1039         data->tx_failed++;
1040 }
1041
1042 static bool hwsim_chans_compat(struct ieee80211_channel *c1,
1043                                struct ieee80211_channel *c2)
1044 {
1045         if (!c1 || !c2)
1046                 return false;
1047
1048         return c1->center_freq == c2->center_freq;
1049 }
1050
1051 struct tx_iter_data {
1052         struct ieee80211_channel *channel;
1053         bool receive;
1054 };
1055
1056 static void mac80211_hwsim_tx_iter(void *_data, u8 *addr,
1057                                    struct ieee80211_vif *vif)
1058 {
1059         struct tx_iter_data *data = _data;
1060
1061         if (!vif->chanctx_conf)
1062                 return;
1063
1064         if (!hwsim_chans_compat(data->channel,
1065                                 rcu_dereference(vif->chanctx_conf)->def.chan))
1066                 return;
1067
1068         data->receive = true;
1069 }
1070
1071 static void mac80211_hwsim_add_vendor_rtap(struct sk_buff *skb)
1072 {
1073         /*
1074          * To enable this code, #define the HWSIM_RADIOTAP_OUI,
1075          * e.g. like this:
1076          * #define HWSIM_RADIOTAP_OUI "\x02\x00\x00"
1077          * (but you should use a valid OUI, not that)
1078          *
1079          * If anyone wants to 'donate' a radiotap OUI/subns code
1080          * please send a patch removing this #ifdef and changing
1081          * the values accordingly.
1082          */
1083 #ifdef HWSIM_RADIOTAP_OUI
1084         struct ieee80211_vendor_radiotap *rtap;
1085
1086         /*
1087          * Note that this code requires the headroom in the SKB
1088          * that was allocated earlier.
1089          */
1090         rtap = (void *)skb_push(skb, sizeof(*rtap) + 8 + 4);
1091         rtap->oui[0] = HWSIM_RADIOTAP_OUI[0];
1092         rtap->oui[1] = HWSIM_RADIOTAP_OUI[1];
1093         rtap->oui[2] = HWSIM_RADIOTAP_OUI[2];
1094         rtap->subns = 127;
1095
1096         /*
1097          * Radiotap vendor namespaces can (and should) also be
1098          * split into fields by using the standard radiotap
1099          * presence bitmap mechanism. Use just BIT(0) here for
1100          * the presence bitmap.
1101          */
1102         rtap->present = BIT(0);
1103         /* We have 8 bytes of (dummy) data */
1104         rtap->len = 8;
1105         /* For testing, also require it to be aligned */
1106         rtap->align = 8;
1107         /* And also test that padding works, 4 bytes */
1108         rtap->pad = 4;
1109         /* push the data */
1110         memcpy(rtap->data, "ABCDEFGH", 8);
1111         /* make sure to clear padding, mac80211 doesn't */
1112         memset(rtap->data + 8, 0, 4);
1113
1114         IEEE80211_SKB_RXCB(skb)->flag |= RX_FLAG_RADIOTAP_VENDOR_DATA;
1115 #endif
1116 }
1117
1118 static bool mac80211_hwsim_tx_frame_no_nl(struct ieee80211_hw *hw,
1119                                           struct sk_buff *skb,
1120                                           struct ieee80211_channel *chan)
1121 {
1122         struct mac80211_hwsim_data *data = hw->priv, *data2;
1123         bool ack = false;
1124         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1125         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1126         struct ieee80211_rx_status rx_status;
1127         u64 now;
1128
1129         memset(&rx_status, 0, sizeof(rx_status));
1130         rx_status.flag |= RX_FLAG_MACTIME_START;
1131         rx_status.freq = chan->center_freq;
1132         rx_status.band = chan->band;
1133         if (info->control.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) {
1134                 rx_status.rate_idx =
1135                         ieee80211_rate_get_vht_mcs(&info->control.rates[0]);
1136                 rx_status.vht_nss =
1137                         ieee80211_rate_get_vht_nss(&info->control.rates[0]);
1138                 rx_status.flag |= RX_FLAG_VHT;
1139         } else {
1140                 rx_status.rate_idx = info->control.rates[0].idx;
1141                 if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS)
1142                         rx_status.flag |= RX_FLAG_HT;
1143         }
1144         if (info->control.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
1145                 rx_status.flag |= RX_FLAG_40MHZ;
1146         if (info->control.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
1147                 rx_status.flag |= RX_FLAG_SHORT_GI;
1148         /* TODO: simulate real signal strength (and optional packet loss) */
1149         rx_status.signal = data->power_level - 50;
1150
1151         if (data->ps != PS_DISABLED)
1152                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1153
1154         /* release the skb's source info */
1155         skb_orphan(skb);
1156         skb_dst_drop(skb);
1157         skb->mark = 0;
1158         secpath_reset(skb);
1159         nf_reset(skb);
1160
1161         /*
1162          * Get absolute mactime here so all HWs RX at the "same time", and
1163          * absolute TX time for beacon mactime so the timestamp matches.
1164          * Giving beacons a different mactime than non-beacons looks messy, but
1165          * it helps the Toffset be exact and a ~10us mactime discrepancy
1166          * probably doesn't really matter.
1167          */
1168         if (ieee80211_is_beacon(hdr->frame_control) ||
1169             ieee80211_is_probe_resp(hdr->frame_control))
1170                 now = data->abs_bcn_ts;
1171         else
1172                 now = mac80211_hwsim_get_tsf_raw();
1173
1174         /* Copy skb to all enabled radios that are on the current frequency */
1175         spin_lock(&hwsim_radio_lock);
1176         list_for_each_entry(data2, &hwsim_radios, list) {
1177                 struct sk_buff *nskb;
1178                 struct tx_iter_data tx_iter_data = {
1179                         .receive = false,
1180                         .channel = chan,
1181                 };
1182
1183                 if (data == data2)
1184                         continue;
1185
1186                 if (!data2->started || (data2->idle && !data2->tmp_chan) ||
1187                     !hwsim_ps_rx_ok(data2, skb))
1188                         continue;
1189
1190                 if (!(data->group & data2->group))
1191                         continue;
1192
1193                 if (!hwsim_chans_compat(chan, data2->tmp_chan) &&
1194                     !hwsim_chans_compat(chan, data2->channel)) {
1195                         ieee80211_iterate_active_interfaces_atomic(
1196                                 data2->hw, IEEE80211_IFACE_ITER_NORMAL,
1197                                 mac80211_hwsim_tx_iter, &tx_iter_data);
1198                         if (!tx_iter_data.receive)
1199                                 continue;
1200                 }
1201
1202                 /*
1203                  * reserve some space for our vendor and the normal
1204                  * radiotap header, since we're copying anyway
1205                  */
1206                 if (skb->len < PAGE_SIZE && paged_rx) {
1207                         struct page *page = alloc_page(GFP_ATOMIC);
1208
1209                         if (!page)
1210                                 continue;
1211
1212                         nskb = dev_alloc_skb(128);
1213                         if (!nskb) {
1214                                 __free_page(page);
1215                                 continue;
1216                         }
1217
1218                         memcpy(page_address(page), skb->data, skb->len);
1219                         skb_add_rx_frag(nskb, 0, page, 0, skb->len, skb->len);
1220                 } else {
1221                         nskb = skb_copy(skb, GFP_ATOMIC);
1222                         if (!nskb)
1223                                 continue;
1224                 }
1225
1226                 if (mac80211_hwsim_addr_match(data2, hdr->addr1))
1227                         ack = true;
1228
1229                 rx_status.mactime = now + data2->tsf_offset;
1230
1231                 memcpy(IEEE80211_SKB_RXCB(nskb), &rx_status, sizeof(rx_status));
1232
1233                 mac80211_hwsim_add_vendor_rtap(nskb);
1234
1235                 data2->rx_pkts++;
1236                 data2->rx_bytes += nskb->len;
1237                 ieee80211_rx_irqsafe(data2->hw, nskb);
1238         }
1239         spin_unlock(&hwsim_radio_lock);
1240
1241         return ack;
1242 }
1243
1244 static void mac80211_hwsim_tx(struct ieee80211_hw *hw,
1245                               struct ieee80211_tx_control *control,
1246                               struct sk_buff *skb)
1247 {
1248         struct mac80211_hwsim_data *data = hw->priv;
1249         struct ieee80211_tx_info *txi = IEEE80211_SKB_CB(skb);
1250         struct ieee80211_chanctx_conf *chanctx_conf;
1251         struct ieee80211_channel *channel;
1252         bool ack;
1253         u32 _portid;
1254
1255         if (WARN_ON(skb->len < 10)) {
1256                 /* Should not happen; just a sanity check for addr1 use */
1257                 ieee80211_free_txskb(hw, skb);
1258                 return;
1259         }
1260
1261         if (!data->use_chanctx) {
1262                 channel = data->channel;
1263         } else if (txi->hw_queue == 4) {
1264                 channel = data->tmp_chan;
1265         } else {
1266                 chanctx_conf = rcu_dereference(txi->control.vif->chanctx_conf);
1267                 if (chanctx_conf)
1268                         channel = chanctx_conf->def.chan;
1269                 else
1270                         channel = NULL;
1271         }
1272
1273         if (WARN(!channel, "TX w/o channel - queue = %d\n", txi->hw_queue)) {
1274                 ieee80211_free_txskb(hw, skb);
1275                 return;
1276         }
1277
1278         if (data->idle && !data->tmp_chan) {
1279                 wiphy_debug(hw->wiphy, "Trying to TX when idle - reject\n");
1280                 ieee80211_free_txskb(hw, skb);
1281                 return;
1282         }
1283
1284         if (txi->control.vif)
1285                 hwsim_check_magic(txi->control.vif);
1286         if (control->sta)
1287                 hwsim_check_sta_magic(control->sta);
1288
1289         if (hw->flags & IEEE80211_HW_SUPPORTS_RC_TABLE)
1290                 ieee80211_get_tx_rates(txi->control.vif, control->sta, skb,
1291                                        txi->control.rates,
1292                                        ARRAY_SIZE(txi->control.rates));
1293
1294         txi->rate_driver_data[0] = channel;
1295         mac80211_hwsim_monitor_rx(hw, skb, channel);
1296
1297         /* wmediumd mode check */
1298         _portid = ACCESS_ONCE(wmediumd_portid);
1299
1300         if (_portid)
1301                 return mac80211_hwsim_tx_frame_nl(hw, skb, _portid);
1302
1303         /* NO wmediumd detected, perfect medium simulation */
1304         data->tx_pkts++;
1305         data->tx_bytes += skb->len;
1306         ack = mac80211_hwsim_tx_frame_no_nl(hw, skb, channel);
1307
1308         if (ack && skb->len >= 16) {
1309                 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1310                 mac80211_hwsim_monitor_ack(channel, hdr->addr2);
1311         }
1312
1313         ieee80211_tx_info_clear_status(txi);
1314
1315         /* frame was transmitted at most favorable rate at first attempt */
1316         txi->control.rates[0].count = 1;
1317         txi->control.rates[1].idx = -1;
1318
1319         if (!(txi->flags & IEEE80211_TX_CTL_NO_ACK) && ack)
1320                 txi->flags |= IEEE80211_TX_STAT_ACK;
1321         ieee80211_tx_status_irqsafe(hw, skb);
1322 }
1323
1324
1325 static int mac80211_hwsim_start(struct ieee80211_hw *hw)
1326 {
1327         struct mac80211_hwsim_data *data = hw->priv;
1328         wiphy_debug(hw->wiphy, "%s\n", __func__);
1329         data->started = true;
1330         return 0;
1331 }
1332
1333
1334 static void mac80211_hwsim_stop(struct ieee80211_hw *hw)
1335 {
1336         struct mac80211_hwsim_data *data = hw->priv;
1337         data->started = false;
1338         tasklet_hrtimer_cancel(&data->beacon_timer);
1339         wiphy_debug(hw->wiphy, "%s\n", __func__);
1340 }
1341
1342
1343 static int mac80211_hwsim_add_interface(struct ieee80211_hw *hw,
1344                                         struct ieee80211_vif *vif)
1345 {
1346         wiphy_debug(hw->wiphy, "%s (type=%d mac_addr=%pM)\n",
1347                     __func__, ieee80211_vif_type_p2p(vif),
1348                     vif->addr);
1349         hwsim_set_magic(vif);
1350
1351         vif->cab_queue = 0;
1352         vif->hw_queue[IEEE80211_AC_VO] = 0;
1353         vif->hw_queue[IEEE80211_AC_VI] = 1;
1354         vif->hw_queue[IEEE80211_AC_BE] = 2;
1355         vif->hw_queue[IEEE80211_AC_BK] = 3;
1356
1357         return 0;
1358 }
1359
1360
1361 static int mac80211_hwsim_change_interface(struct ieee80211_hw *hw,
1362                                            struct ieee80211_vif *vif,
1363                                            enum nl80211_iftype newtype,
1364                                            bool newp2p)
1365 {
1366         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1367         wiphy_debug(hw->wiphy,
1368                     "%s (old type=%d, new type=%d, mac_addr=%pM)\n",
1369                     __func__, ieee80211_vif_type_p2p(vif),
1370                     newtype, vif->addr);
1371         hwsim_check_magic(vif);
1372
1373         /*
1374          * interface may change from non-AP to AP in
1375          * which case this needs to be set up again
1376          */
1377         vif->cab_queue = 0;
1378
1379         return 0;
1380 }
1381
1382 static void mac80211_hwsim_remove_interface(
1383         struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1384 {
1385         wiphy_debug(hw->wiphy, "%s (type=%d mac_addr=%pM)\n",
1386                     __func__, ieee80211_vif_type_p2p(vif),
1387                     vif->addr);
1388         hwsim_check_magic(vif);
1389         hwsim_clear_magic(vif);
1390 }
1391
1392 static void mac80211_hwsim_tx_frame(struct ieee80211_hw *hw,
1393                                     struct sk_buff *skb,
1394                                     struct ieee80211_channel *chan)
1395 {
1396         u32 _pid = ACCESS_ONCE(wmediumd_portid);
1397
1398         if (hw->flags & IEEE80211_HW_SUPPORTS_RC_TABLE) {
1399                 struct ieee80211_tx_info *txi = IEEE80211_SKB_CB(skb);
1400                 ieee80211_get_tx_rates(txi->control.vif, NULL, skb,
1401                                        txi->control.rates,
1402                                        ARRAY_SIZE(txi->control.rates));
1403         }
1404
1405         mac80211_hwsim_monitor_rx(hw, skb, chan);
1406
1407         if (_pid)
1408                 return mac80211_hwsim_tx_frame_nl(hw, skb, _pid);
1409
1410         mac80211_hwsim_tx_frame_no_nl(hw, skb, chan);
1411         dev_kfree_skb(skb);
1412 }
1413
1414 static void mac80211_hwsim_beacon_tx(void *arg, u8 *mac,
1415                                      struct ieee80211_vif *vif)
1416 {
1417         struct mac80211_hwsim_data *data = arg;
1418         struct ieee80211_hw *hw = data->hw;
1419         struct ieee80211_tx_info *info;
1420         struct ieee80211_rate *txrate;
1421         struct ieee80211_mgmt *mgmt;
1422         struct sk_buff *skb;
1423
1424         hwsim_check_magic(vif);
1425
1426         if (vif->type != NL80211_IFTYPE_AP &&
1427             vif->type != NL80211_IFTYPE_MESH_POINT &&
1428             vif->type != NL80211_IFTYPE_ADHOC)
1429                 return;
1430
1431         skb = ieee80211_beacon_get(hw, vif);
1432         if (skb == NULL)
1433                 return;
1434         info = IEEE80211_SKB_CB(skb);
1435         if (hw->flags & IEEE80211_HW_SUPPORTS_RC_TABLE)
1436                 ieee80211_get_tx_rates(vif, NULL, skb,
1437                                        info->control.rates,
1438                                        ARRAY_SIZE(info->control.rates));
1439
1440         txrate = ieee80211_get_tx_rate(hw, info);
1441
1442         mgmt = (struct ieee80211_mgmt *) skb->data;
1443         /* fake header transmission time */
1444         data->abs_bcn_ts = mac80211_hwsim_get_tsf_raw();
1445         mgmt->u.beacon.timestamp = cpu_to_le64(data->abs_bcn_ts +
1446                                                data->tsf_offset +
1447                                                24 * 8 * 10 / txrate->bitrate);
1448
1449         mac80211_hwsim_tx_frame(hw, skb,
1450                                 rcu_dereference(vif->chanctx_conf)->def.chan);
1451
1452         if (vif->csa_active && ieee80211_csa_is_complete(vif))
1453                 ieee80211_csa_finish(vif);
1454 }
1455
1456 static enum hrtimer_restart
1457 mac80211_hwsim_beacon(struct hrtimer *timer)
1458 {
1459         struct mac80211_hwsim_data *data =
1460                 container_of(timer, struct mac80211_hwsim_data,
1461                              beacon_timer.timer);
1462         struct ieee80211_hw *hw = data->hw;
1463         u64 bcn_int = data->beacon_int;
1464         ktime_t next_bcn;
1465
1466         if (!data->started)
1467                 goto out;
1468
1469         ieee80211_iterate_active_interfaces_atomic(
1470                 hw, IEEE80211_IFACE_ITER_NORMAL,
1471                 mac80211_hwsim_beacon_tx, data);
1472
1473         /* beacon at new TBTT + beacon interval */
1474         if (data->bcn_delta) {
1475                 bcn_int -= data->bcn_delta;
1476                 data->bcn_delta = 0;
1477         }
1478
1479         next_bcn = ktime_add(hrtimer_get_expires(timer),
1480                              ns_to_ktime(bcn_int * 1000));
1481         tasklet_hrtimer_start(&data->beacon_timer, next_bcn, HRTIMER_MODE_ABS);
1482 out:
1483         return HRTIMER_NORESTART;
1484 }
1485
1486 static const char * const hwsim_chanwidths[] = {
1487         [NL80211_CHAN_WIDTH_20_NOHT] = "noht",
1488         [NL80211_CHAN_WIDTH_20] = "ht20",
1489         [NL80211_CHAN_WIDTH_40] = "ht40",
1490         [NL80211_CHAN_WIDTH_80] = "vht80",
1491         [NL80211_CHAN_WIDTH_80P80] = "vht80p80",
1492         [NL80211_CHAN_WIDTH_160] = "vht160",
1493 };
1494
1495 static int mac80211_hwsim_config(struct ieee80211_hw *hw, u32 changed)
1496 {
1497         struct mac80211_hwsim_data *data = hw->priv;
1498         struct ieee80211_conf *conf = &hw->conf;
1499         static const char *smps_modes[IEEE80211_SMPS_NUM_MODES] = {
1500                 [IEEE80211_SMPS_AUTOMATIC] = "auto",
1501                 [IEEE80211_SMPS_OFF] = "off",
1502                 [IEEE80211_SMPS_STATIC] = "static",
1503                 [IEEE80211_SMPS_DYNAMIC] = "dynamic",
1504         };
1505
1506         if (conf->chandef.chan)
1507                 wiphy_debug(hw->wiphy,
1508                             "%s (freq=%d(%d - %d)/%s idle=%d ps=%d smps=%s)\n",
1509                             __func__,
1510                             conf->chandef.chan->center_freq,
1511                             conf->chandef.center_freq1,
1512                             conf->chandef.center_freq2,
1513                             hwsim_chanwidths[conf->chandef.width],
1514                             !!(conf->flags & IEEE80211_CONF_IDLE),
1515                             !!(conf->flags & IEEE80211_CONF_PS),
1516                             smps_modes[conf->smps_mode]);
1517         else
1518                 wiphy_debug(hw->wiphy,
1519                             "%s (freq=0 idle=%d ps=%d smps=%s)\n",
1520                             __func__,
1521                             !!(conf->flags & IEEE80211_CONF_IDLE),
1522                             !!(conf->flags & IEEE80211_CONF_PS),
1523                             smps_modes[conf->smps_mode]);
1524
1525         data->idle = !!(conf->flags & IEEE80211_CONF_IDLE);
1526
1527         data->channel = conf->chandef.chan;
1528
1529         WARN_ON(data->channel && data->use_chanctx);
1530
1531         data->power_level = conf->power_level;
1532         if (!data->started || !data->beacon_int)
1533                 tasklet_hrtimer_cancel(&data->beacon_timer);
1534         else if (!hrtimer_is_queued(&data->beacon_timer.timer)) {
1535                 u64 tsf = mac80211_hwsim_get_tsf(hw, NULL);
1536                 u32 bcn_int = data->beacon_int;
1537                 u64 until_tbtt = bcn_int - do_div(tsf, bcn_int);
1538
1539                 tasklet_hrtimer_start(&data->beacon_timer,
1540                                       ns_to_ktime(until_tbtt * 1000),
1541                                       HRTIMER_MODE_REL);
1542         }
1543
1544         return 0;
1545 }
1546
1547
1548 static void mac80211_hwsim_configure_filter(struct ieee80211_hw *hw,
1549                                             unsigned int changed_flags,
1550                                             unsigned int *total_flags,u64 multicast)
1551 {
1552         struct mac80211_hwsim_data *data = hw->priv;
1553
1554         wiphy_debug(hw->wiphy, "%s\n", __func__);
1555
1556         data->rx_filter = 0;
1557         if (*total_flags & FIF_PROMISC_IN_BSS)
1558                 data->rx_filter |= FIF_PROMISC_IN_BSS;
1559         if (*total_flags & FIF_ALLMULTI)
1560                 data->rx_filter |= FIF_ALLMULTI;
1561
1562         *total_flags = data->rx_filter;
1563 }
1564
1565 static void mac80211_hwsim_bcn_en_iter(void *data, u8 *mac,
1566                                        struct ieee80211_vif *vif)
1567 {
1568         unsigned int *count = data;
1569         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
1570
1571         if (vp->bcn_en)
1572                 (*count)++;
1573 }
1574
1575 static void mac80211_hwsim_bss_info_changed(struct ieee80211_hw *hw,
1576                                             struct ieee80211_vif *vif,
1577                                             struct ieee80211_bss_conf *info,
1578                                             u32 changed)
1579 {
1580         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
1581         struct mac80211_hwsim_data *data = hw->priv;
1582
1583         hwsim_check_magic(vif);
1584
1585         wiphy_debug(hw->wiphy, "%s(changed=0x%x vif->addr=%pM)\n",
1586                     __func__, changed, vif->addr);
1587
1588         if (changed & BSS_CHANGED_BSSID) {
1589                 wiphy_debug(hw->wiphy, "%s: BSSID changed: %pM\n",
1590                             __func__, info->bssid);
1591                 memcpy(vp->bssid, info->bssid, ETH_ALEN);
1592         }
1593
1594         if (changed & BSS_CHANGED_ASSOC) {
1595                 wiphy_debug(hw->wiphy, "  ASSOC: assoc=%d aid=%d\n",
1596                             info->assoc, info->aid);
1597                 vp->assoc = info->assoc;
1598                 vp->aid = info->aid;
1599         }
1600
1601         if (changed & BSS_CHANGED_BEACON_ENABLED) {
1602                 wiphy_debug(hw->wiphy, "  BCN EN: %d (BI=%u)\n",
1603                             info->enable_beacon, info->beacon_int);
1604                 vp->bcn_en = info->enable_beacon;
1605                 if (data->started &&
1606                     !hrtimer_is_queued(&data->beacon_timer.timer) &&
1607                     info->enable_beacon) {
1608                         u64 tsf, until_tbtt;
1609                         u32 bcn_int;
1610                         data->beacon_int = info->beacon_int * 1024;
1611                         tsf = mac80211_hwsim_get_tsf(hw, vif);
1612                         bcn_int = data->beacon_int;
1613                         until_tbtt = bcn_int - do_div(tsf, bcn_int);
1614                         tasklet_hrtimer_start(&data->beacon_timer,
1615                                               ns_to_ktime(until_tbtt * 1000),
1616                                               HRTIMER_MODE_REL);
1617                 } else if (!info->enable_beacon) {
1618                         unsigned int count = 0;
1619                         ieee80211_iterate_active_interfaces_atomic(
1620                                 data->hw, IEEE80211_IFACE_ITER_NORMAL,
1621                                 mac80211_hwsim_bcn_en_iter, &count);
1622                         wiphy_debug(hw->wiphy, "  beaconing vifs remaining: %u",
1623                                     count);
1624                         if (count == 0) {
1625                                 tasklet_hrtimer_cancel(&data->beacon_timer);
1626                                 data->beacon_int = 0;
1627                         }
1628                 }
1629         }
1630
1631         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1632                 wiphy_debug(hw->wiphy, "  ERP_CTS_PROT: %d\n",
1633                             info->use_cts_prot);
1634         }
1635
1636         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1637                 wiphy_debug(hw->wiphy, "  ERP_PREAMBLE: %d\n",
1638                             info->use_short_preamble);
1639         }
1640
1641         if (changed & BSS_CHANGED_ERP_SLOT) {
1642                 wiphy_debug(hw->wiphy, "  ERP_SLOT: %d\n", info->use_short_slot);
1643         }
1644
1645         if (changed & BSS_CHANGED_HT) {
1646                 wiphy_debug(hw->wiphy, "  HT: op_mode=0x%x\n",
1647                             info->ht_operation_mode);
1648         }
1649
1650         if (changed & BSS_CHANGED_BASIC_RATES) {
1651                 wiphy_debug(hw->wiphy, "  BASIC_RATES: 0x%llx\n",
1652                             (unsigned long long) info->basic_rates);
1653         }
1654
1655         if (changed & BSS_CHANGED_TXPOWER)
1656                 wiphy_debug(hw->wiphy, "  TX Power: %d dBm\n", info->txpower);
1657 }
1658
1659 static int mac80211_hwsim_sta_add(struct ieee80211_hw *hw,
1660                                   struct ieee80211_vif *vif,
1661                                   struct ieee80211_sta *sta)
1662 {
1663         hwsim_check_magic(vif);
1664         hwsim_set_sta_magic(sta);
1665
1666         return 0;
1667 }
1668
1669 static int mac80211_hwsim_sta_remove(struct ieee80211_hw *hw,
1670                                      struct ieee80211_vif *vif,
1671                                      struct ieee80211_sta *sta)
1672 {
1673         hwsim_check_magic(vif);
1674         hwsim_clear_sta_magic(sta);
1675
1676         return 0;
1677 }
1678
1679 static void mac80211_hwsim_sta_notify(struct ieee80211_hw *hw,
1680                                       struct ieee80211_vif *vif,
1681                                       enum sta_notify_cmd cmd,
1682                                       struct ieee80211_sta *sta)
1683 {
1684         hwsim_check_magic(vif);
1685
1686         switch (cmd) {
1687         case STA_NOTIFY_SLEEP:
1688         case STA_NOTIFY_AWAKE:
1689                 /* TODO: make good use of these flags */
1690                 break;
1691         default:
1692                 WARN(1, "Invalid sta notify: %d\n", cmd);
1693                 break;
1694         }
1695 }
1696
1697 static int mac80211_hwsim_set_tim(struct ieee80211_hw *hw,
1698                                   struct ieee80211_sta *sta,
1699                                   bool set)
1700 {
1701         hwsim_check_sta_magic(sta);
1702         return 0;
1703 }
1704
1705 static int mac80211_hwsim_conf_tx(
1706         struct ieee80211_hw *hw,
1707         struct ieee80211_vif *vif, u16 queue,
1708         const struct ieee80211_tx_queue_params *params)
1709 {
1710         wiphy_debug(hw->wiphy,
1711                     "%s (queue=%d txop=%d cw_min=%d cw_max=%d aifs=%d)\n",
1712                     __func__, queue,
1713                     params->txop, params->cw_min,
1714                     params->cw_max, params->aifs);
1715         return 0;
1716 }
1717
1718 static int mac80211_hwsim_get_survey(
1719         struct ieee80211_hw *hw, int idx,
1720         struct survey_info *survey)
1721 {
1722         struct ieee80211_conf *conf = &hw->conf;
1723
1724         wiphy_debug(hw->wiphy, "%s (idx=%d)\n", __func__, idx);
1725
1726         if (idx != 0)
1727                 return -ENOENT;
1728
1729         /* Current channel */
1730         survey->channel = conf->chandef.chan;
1731
1732         /*
1733          * Magically conjured noise level --- this is only ok for simulated hardware.
1734          *
1735          * A real driver which cannot determine the real channel noise MUST NOT
1736          * report any noise, especially not a magically conjured one :-)
1737          */
1738         survey->filled = SURVEY_INFO_NOISE_DBM;
1739         survey->noise = -92;
1740
1741         return 0;
1742 }
1743
1744 #ifdef CONFIG_NL80211_TESTMODE
1745 /*
1746  * This section contains example code for using netlink
1747  * attributes with the testmode command in nl80211.
1748  */
1749
1750 /* These enums need to be kept in sync with userspace */
1751 enum hwsim_testmode_attr {
1752         __HWSIM_TM_ATTR_INVALID = 0,
1753         HWSIM_TM_ATTR_CMD       = 1,
1754         HWSIM_TM_ATTR_PS        = 2,
1755
1756         /* keep last */
1757         __HWSIM_TM_ATTR_AFTER_LAST,
1758         HWSIM_TM_ATTR_MAX       = __HWSIM_TM_ATTR_AFTER_LAST - 1
1759 };
1760
1761 enum hwsim_testmode_cmd {
1762         HWSIM_TM_CMD_SET_PS             = 0,
1763         HWSIM_TM_CMD_GET_PS             = 1,
1764         HWSIM_TM_CMD_STOP_QUEUES        = 2,
1765         HWSIM_TM_CMD_WAKE_QUEUES        = 3,
1766 };
1767
1768 static const struct nla_policy hwsim_testmode_policy[HWSIM_TM_ATTR_MAX + 1] = {
1769         [HWSIM_TM_ATTR_CMD] = { .type = NLA_U32 },
1770         [HWSIM_TM_ATTR_PS] = { .type = NLA_U32 },
1771 };
1772
1773 static int mac80211_hwsim_testmode_cmd(struct ieee80211_hw *hw,
1774                                        struct ieee80211_vif *vif,
1775                                        void *data, int len)
1776 {
1777         struct mac80211_hwsim_data *hwsim = hw->priv;
1778         struct nlattr *tb[HWSIM_TM_ATTR_MAX + 1];
1779         struct sk_buff *skb;
1780         int err, ps;
1781
1782         err = nla_parse(tb, HWSIM_TM_ATTR_MAX, data, len,
1783                         hwsim_testmode_policy);
1784         if (err)
1785                 return err;
1786
1787         if (!tb[HWSIM_TM_ATTR_CMD])
1788                 return -EINVAL;
1789
1790         switch (nla_get_u32(tb[HWSIM_TM_ATTR_CMD])) {
1791         case HWSIM_TM_CMD_SET_PS:
1792                 if (!tb[HWSIM_TM_ATTR_PS])
1793                         return -EINVAL;
1794                 ps = nla_get_u32(tb[HWSIM_TM_ATTR_PS]);
1795                 return hwsim_fops_ps_write(hwsim, ps);
1796         case HWSIM_TM_CMD_GET_PS:
1797                 skb = cfg80211_testmode_alloc_reply_skb(hw->wiphy,
1798                                                 nla_total_size(sizeof(u32)));
1799                 if (!skb)
1800                         return -ENOMEM;
1801                 if (nla_put_u32(skb, HWSIM_TM_ATTR_PS, hwsim->ps))
1802                         goto nla_put_failure;
1803                 return cfg80211_testmode_reply(skb);
1804         case HWSIM_TM_CMD_STOP_QUEUES:
1805                 ieee80211_stop_queues(hw);
1806                 return 0;
1807         case HWSIM_TM_CMD_WAKE_QUEUES:
1808                 ieee80211_wake_queues(hw);
1809                 return 0;
1810         default:
1811                 return -EOPNOTSUPP;
1812         }
1813
1814  nla_put_failure:
1815         kfree_skb(skb);
1816         return -ENOBUFS;
1817 }
1818 #endif
1819
1820 static int mac80211_hwsim_ampdu_action(struct ieee80211_hw *hw,
1821                                        struct ieee80211_vif *vif,
1822                                        enum ieee80211_ampdu_mlme_action action,
1823                                        struct ieee80211_sta *sta, u16 tid, u16 *ssn,
1824                                        u8 buf_size)
1825 {
1826         switch (action) {
1827         case IEEE80211_AMPDU_TX_START:
1828                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1829                 break;
1830         case IEEE80211_AMPDU_TX_STOP_CONT:
1831         case IEEE80211_AMPDU_TX_STOP_FLUSH:
1832         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
1833                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1834                 break;
1835         case IEEE80211_AMPDU_TX_OPERATIONAL:
1836                 break;
1837         case IEEE80211_AMPDU_RX_START:
1838         case IEEE80211_AMPDU_RX_STOP:
1839                 break;
1840         default:
1841                 return -EOPNOTSUPP;
1842         }
1843
1844         return 0;
1845 }
1846
1847 static void mac80211_hwsim_flush(struct ieee80211_hw *hw,
1848                                  struct ieee80211_vif *vif,
1849                                  u32 queues, bool drop)
1850 {
1851         /* Not implemented, queues only on kernel side */
1852 }
1853
1854 static void hw_scan_work(struct work_struct *work)
1855 {
1856         struct mac80211_hwsim_data *hwsim =
1857                 container_of(work, struct mac80211_hwsim_data, hw_scan.work);
1858         struct cfg80211_scan_request *req = hwsim->hw_scan_request;
1859         int dwell, i;
1860
1861         mutex_lock(&hwsim->mutex);
1862         if (hwsim->scan_chan_idx >= req->n_channels) {
1863                 wiphy_debug(hwsim->hw->wiphy, "hw scan complete\n");
1864                 ieee80211_scan_completed(hwsim->hw, false);
1865                 hwsim->hw_scan_request = NULL;
1866                 hwsim->hw_scan_vif = NULL;
1867                 hwsim->tmp_chan = NULL;
1868                 mutex_unlock(&hwsim->mutex);
1869                 return;
1870         }
1871
1872         wiphy_debug(hwsim->hw->wiphy, "hw scan %d MHz\n",
1873                     req->channels[hwsim->scan_chan_idx]->center_freq);
1874
1875         hwsim->tmp_chan = req->channels[hwsim->scan_chan_idx];
1876         if (hwsim->tmp_chan->flags & IEEE80211_CHAN_NO_IR ||
1877             !req->n_ssids) {
1878                 dwell = 120;
1879         } else {
1880                 dwell = 30;
1881                 /* send probes */
1882                 for (i = 0; i < req->n_ssids; i++) {
1883                         struct sk_buff *probe;
1884
1885                         probe = ieee80211_probereq_get(hwsim->hw,
1886                                                        hwsim->scan_addr,
1887                                                        req->ssids[i].ssid,
1888                                                        req->ssids[i].ssid_len,
1889                                                        req->ie_len);
1890                         if (!probe)
1891                                 continue;
1892
1893                         if (req->ie_len)
1894                                 memcpy(skb_put(probe, req->ie_len), req->ie,
1895                                        req->ie_len);
1896
1897                         local_bh_disable();
1898                         mac80211_hwsim_tx_frame(hwsim->hw, probe,
1899                                                 hwsim->tmp_chan);
1900                         local_bh_enable();
1901                 }
1902         }
1903         ieee80211_queue_delayed_work(hwsim->hw, &hwsim->hw_scan,
1904                                      msecs_to_jiffies(dwell));
1905         hwsim->scan_chan_idx++;
1906         mutex_unlock(&hwsim->mutex);
1907 }
1908
1909 static int mac80211_hwsim_hw_scan(struct ieee80211_hw *hw,
1910                                   struct ieee80211_vif *vif,
1911                                   struct ieee80211_scan_request *hw_req)
1912 {
1913         struct mac80211_hwsim_data *hwsim = hw->priv;
1914         struct cfg80211_scan_request *req = &hw_req->req;
1915
1916         mutex_lock(&hwsim->mutex);
1917         if (WARN_ON(hwsim->tmp_chan || hwsim->hw_scan_request)) {
1918                 mutex_unlock(&hwsim->mutex);
1919                 return -EBUSY;
1920         }
1921         hwsim->hw_scan_request = req;
1922         hwsim->hw_scan_vif = vif;
1923         hwsim->scan_chan_idx = 0;
1924         if (req->flags & NL80211_SCAN_FLAG_RANDOM_ADDR)
1925                 get_random_mask_addr(hwsim->scan_addr,
1926                                      hw_req->req.mac_addr,
1927                                      hw_req->req.mac_addr_mask);
1928         else
1929                 memcpy(hwsim->scan_addr, vif->addr, ETH_ALEN);
1930         mutex_unlock(&hwsim->mutex);
1931
1932         wiphy_debug(hw->wiphy, "hwsim hw_scan request\n");
1933
1934         ieee80211_queue_delayed_work(hwsim->hw, &hwsim->hw_scan, 0);
1935
1936         return 0;
1937 }
1938
1939 static void mac80211_hwsim_cancel_hw_scan(struct ieee80211_hw *hw,
1940                                           struct ieee80211_vif *vif)
1941 {
1942         struct mac80211_hwsim_data *hwsim = hw->priv;
1943
1944         wiphy_debug(hw->wiphy, "hwsim cancel_hw_scan\n");
1945
1946         cancel_delayed_work_sync(&hwsim->hw_scan);
1947
1948         mutex_lock(&hwsim->mutex);
1949         ieee80211_scan_completed(hwsim->hw, true);
1950         hwsim->tmp_chan = NULL;
1951         hwsim->hw_scan_request = NULL;
1952         hwsim->hw_scan_vif = NULL;
1953         mutex_unlock(&hwsim->mutex);
1954 }
1955
1956 static void mac80211_hwsim_sw_scan(struct ieee80211_hw *hw,
1957                                    struct ieee80211_vif *vif,
1958                                    const u8 *mac_addr)
1959 {
1960         struct mac80211_hwsim_data *hwsim = hw->priv;
1961
1962         mutex_lock(&hwsim->mutex);
1963
1964         if (hwsim->scanning) {
1965                 printk(KERN_DEBUG "two hwsim sw_scans detected!\n");
1966                 goto out;
1967         }
1968
1969         printk(KERN_DEBUG "hwsim sw_scan request, prepping stuff\n");
1970
1971         memcpy(hwsim->scan_addr, mac_addr, ETH_ALEN);
1972         hwsim->scanning = true;
1973
1974 out:
1975         mutex_unlock(&hwsim->mutex);
1976 }
1977
1978 static void mac80211_hwsim_sw_scan_complete(struct ieee80211_hw *hw,
1979                                             struct ieee80211_vif *vif)
1980 {
1981         struct mac80211_hwsim_data *hwsim = hw->priv;
1982
1983         mutex_lock(&hwsim->mutex);
1984
1985         printk(KERN_DEBUG "hwsim sw_scan_complete\n");
1986         hwsim->scanning = false;
1987         eth_zero_addr(hwsim->scan_addr);
1988
1989         mutex_unlock(&hwsim->mutex);
1990 }
1991
1992 static void hw_roc_done(struct work_struct *work)
1993 {
1994         struct mac80211_hwsim_data *hwsim =
1995                 container_of(work, struct mac80211_hwsim_data, roc_done.work);
1996
1997         mutex_lock(&hwsim->mutex);
1998         ieee80211_remain_on_channel_expired(hwsim->hw);
1999         hwsim->tmp_chan = NULL;
2000         mutex_unlock(&hwsim->mutex);
2001
2002         wiphy_debug(hwsim->hw->wiphy, "hwsim ROC expired\n");
2003 }
2004
2005 static int mac80211_hwsim_roc(struct ieee80211_hw *hw,
2006                               struct ieee80211_vif *vif,
2007                               struct ieee80211_channel *chan,
2008                               int duration,
2009                               enum ieee80211_roc_type type)
2010 {
2011         struct mac80211_hwsim_data *hwsim = hw->priv;
2012
2013         mutex_lock(&hwsim->mutex);
2014         if (WARN_ON(hwsim->tmp_chan || hwsim->hw_scan_request)) {
2015                 mutex_unlock(&hwsim->mutex);
2016                 return -EBUSY;
2017         }
2018
2019         hwsim->tmp_chan = chan;
2020         mutex_unlock(&hwsim->mutex);
2021
2022         wiphy_debug(hw->wiphy, "hwsim ROC (%d MHz, %d ms)\n",
2023                     chan->center_freq, duration);
2024
2025         ieee80211_ready_on_channel(hw);
2026
2027         ieee80211_queue_delayed_work(hw, &hwsim->roc_done,
2028                                      msecs_to_jiffies(duration));
2029         return 0;
2030 }
2031
2032 static int mac80211_hwsim_croc(struct ieee80211_hw *hw)
2033 {
2034         struct mac80211_hwsim_data *hwsim = hw->priv;
2035
2036         cancel_delayed_work_sync(&hwsim->roc_done);
2037
2038         mutex_lock(&hwsim->mutex);
2039         hwsim->tmp_chan = NULL;
2040         mutex_unlock(&hwsim->mutex);
2041
2042         wiphy_debug(hw->wiphy, "hwsim ROC canceled\n");
2043
2044         return 0;
2045 }
2046
2047 static int mac80211_hwsim_add_chanctx(struct ieee80211_hw *hw,
2048                                       struct ieee80211_chanctx_conf *ctx)
2049 {
2050         hwsim_set_chanctx_magic(ctx);
2051         wiphy_debug(hw->wiphy,
2052                     "add channel context control: %d MHz/width: %d/cfreqs:%d/%d MHz\n",
2053                     ctx->def.chan->center_freq, ctx->def.width,
2054                     ctx->def.center_freq1, ctx->def.center_freq2);
2055         return 0;
2056 }
2057
2058 static void mac80211_hwsim_remove_chanctx(struct ieee80211_hw *hw,
2059                                           struct ieee80211_chanctx_conf *ctx)
2060 {
2061         wiphy_debug(hw->wiphy,
2062                     "remove channel context control: %d MHz/width: %d/cfreqs:%d/%d MHz\n",
2063                     ctx->def.chan->center_freq, ctx->def.width,
2064                     ctx->def.center_freq1, ctx->def.center_freq2);
2065         hwsim_check_chanctx_magic(ctx);
2066         hwsim_clear_chanctx_magic(ctx);
2067 }
2068
2069 static void mac80211_hwsim_change_chanctx(struct ieee80211_hw *hw,
2070                                           struct ieee80211_chanctx_conf *ctx,
2071                                           u32 changed)
2072 {
2073         hwsim_check_chanctx_magic(ctx);
2074         wiphy_debug(hw->wiphy,
2075                     "change channel context control: %d MHz/width: %d/cfreqs:%d/%d MHz\n",
2076                     ctx->def.chan->center_freq, ctx->def.width,
2077                     ctx->def.center_freq1, ctx->def.center_freq2);
2078 }
2079
2080 static int mac80211_hwsim_assign_vif_chanctx(struct ieee80211_hw *hw,
2081                                              struct ieee80211_vif *vif,
2082                                              struct ieee80211_chanctx_conf *ctx)
2083 {
2084         hwsim_check_magic(vif);
2085         hwsim_check_chanctx_magic(ctx);
2086
2087         return 0;
2088 }
2089
2090 static void mac80211_hwsim_unassign_vif_chanctx(struct ieee80211_hw *hw,
2091                                                 struct ieee80211_vif *vif,
2092                                                 struct ieee80211_chanctx_conf *ctx)
2093 {
2094         hwsim_check_magic(vif);
2095         hwsim_check_chanctx_magic(ctx);
2096 }
2097
2098 static const char mac80211_hwsim_gstrings_stats[][ETH_GSTRING_LEN] = {
2099         "tx_pkts_nic",
2100         "tx_bytes_nic",
2101         "rx_pkts_nic",
2102         "rx_bytes_nic",
2103         "d_tx_dropped",
2104         "d_tx_failed",
2105         "d_ps_mode",
2106         "d_group",
2107         "d_tx_power",
2108 };
2109
2110 #define MAC80211_HWSIM_SSTATS_LEN ARRAY_SIZE(mac80211_hwsim_gstrings_stats)
2111
2112 static void mac80211_hwsim_get_et_strings(struct ieee80211_hw *hw,
2113                                           struct ieee80211_vif *vif,
2114                                           u32 sset, u8 *data)
2115 {
2116         if (sset == ETH_SS_STATS)
2117                 memcpy(data, *mac80211_hwsim_gstrings_stats,
2118                        sizeof(mac80211_hwsim_gstrings_stats));
2119 }
2120
2121 static int mac80211_hwsim_get_et_sset_count(struct ieee80211_hw *hw,
2122                                             struct ieee80211_vif *vif, int sset)
2123 {
2124         if (sset == ETH_SS_STATS)
2125                 return MAC80211_HWSIM_SSTATS_LEN;
2126         return 0;
2127 }
2128
2129 static void mac80211_hwsim_get_et_stats(struct ieee80211_hw *hw,
2130                                         struct ieee80211_vif *vif,
2131                                         struct ethtool_stats *stats, u64 *data)
2132 {
2133         struct mac80211_hwsim_data *ar = hw->priv;
2134         int i = 0;
2135
2136         data[i++] = ar->tx_pkts;
2137         data[i++] = ar->tx_bytes;
2138         data[i++] = ar->rx_pkts;
2139         data[i++] = ar->rx_bytes;
2140         data[i++] = ar->tx_dropped;
2141         data[i++] = ar->tx_failed;
2142         data[i++] = ar->ps;
2143         data[i++] = ar->group;
2144         data[i++] = ar->power_level;
2145
2146         WARN_ON(i != MAC80211_HWSIM_SSTATS_LEN);
2147 }
2148
2149 static const struct ieee80211_ops mac80211_hwsim_ops = {
2150         .tx = mac80211_hwsim_tx,
2151         .start = mac80211_hwsim_start,
2152         .stop = mac80211_hwsim_stop,
2153         .add_interface = mac80211_hwsim_add_interface,
2154         .change_interface = mac80211_hwsim_change_interface,
2155         .remove_interface = mac80211_hwsim_remove_interface,
2156         .config = mac80211_hwsim_config,
2157         .configure_filter = mac80211_hwsim_configure_filter,
2158         .bss_info_changed = mac80211_hwsim_bss_info_changed,
2159         .sta_add = mac80211_hwsim_sta_add,
2160         .sta_remove = mac80211_hwsim_sta_remove,
2161         .sta_notify = mac80211_hwsim_sta_notify,
2162         .set_tim = mac80211_hwsim_set_tim,
2163         .conf_tx = mac80211_hwsim_conf_tx,
2164         .get_survey = mac80211_hwsim_get_survey,
2165         CFG80211_TESTMODE_CMD(mac80211_hwsim_testmode_cmd)
2166         .ampdu_action = mac80211_hwsim_ampdu_action,
2167         .sw_scan_start = mac80211_hwsim_sw_scan,
2168         .sw_scan_complete = mac80211_hwsim_sw_scan_complete,
2169         .flush = mac80211_hwsim_flush,
2170         .get_tsf = mac80211_hwsim_get_tsf,
2171         .set_tsf = mac80211_hwsim_set_tsf,
2172         .get_et_sset_count = mac80211_hwsim_get_et_sset_count,
2173         .get_et_stats = mac80211_hwsim_get_et_stats,
2174         .get_et_strings = mac80211_hwsim_get_et_strings,
2175 };
2176
2177 static struct ieee80211_ops mac80211_hwsim_mchan_ops;
2178
2179 struct hwsim_new_radio_params {
2180         unsigned int channels;
2181         const char *reg_alpha2;
2182         const struct ieee80211_regdomain *regd;
2183         bool reg_strict;
2184         bool p2p_device;
2185         bool use_chanctx;
2186         bool destroy_on_close;
2187         const char *hwname;
2188         bool no_vif;
2189 };
2190
2191 static void hwsim_mcast_config_msg(struct sk_buff *mcast_skb,
2192                                    struct genl_info *info)
2193 {
2194         if (info)
2195                 genl_notify(&hwsim_genl_family, mcast_skb,
2196                             genl_info_net(info), info->snd_portid,
2197                             HWSIM_MCGRP_CONFIG, info->nlhdr, GFP_KERNEL);
2198         else
2199                 genlmsg_multicast(&hwsim_genl_family, mcast_skb, 0,
2200                                   HWSIM_MCGRP_CONFIG, GFP_KERNEL);
2201 }
2202
2203 static int append_radio_msg(struct sk_buff *skb, int id,
2204                             struct hwsim_new_radio_params *param)
2205 {
2206         int ret;
2207
2208         ret = nla_put_u32(skb, HWSIM_ATTR_RADIO_ID, id);
2209         if (ret < 0)
2210                 return ret;
2211
2212         if (param->channels) {
2213                 ret = nla_put_u32(skb, HWSIM_ATTR_CHANNELS, param->channels);
2214                 if (ret < 0)
2215                         return ret;
2216         }
2217
2218         if (param->reg_alpha2) {
2219                 ret = nla_put(skb, HWSIM_ATTR_REG_HINT_ALPHA2, 2,
2220                               param->reg_alpha2);
2221                 if (ret < 0)
2222                         return ret;
2223         }
2224
2225         if (param->regd) {
2226                 int i;
2227
2228                 for (i = 0; i < ARRAY_SIZE(hwsim_world_regdom_custom); i++) {
2229                         if (hwsim_world_regdom_custom[i] != param->regd)
2230                                 continue;
2231
2232                         ret = nla_put_u32(skb, HWSIM_ATTR_REG_CUSTOM_REG, i);
2233                         if (ret < 0)
2234                                 return ret;
2235                         break;
2236                 }
2237         }
2238
2239         if (param->reg_strict) {
2240                 ret = nla_put_flag(skb, HWSIM_ATTR_REG_STRICT_REG);
2241                 if (ret < 0)
2242                         return ret;
2243         }
2244
2245         if (param->p2p_device) {
2246                 ret = nla_put_flag(skb, HWSIM_ATTR_SUPPORT_P2P_DEVICE);
2247                 if (ret < 0)
2248                         return ret;
2249         }
2250
2251         if (param->use_chanctx) {
2252                 ret = nla_put_flag(skb, HWSIM_ATTR_USE_CHANCTX);
2253                 if (ret < 0)
2254                         return ret;
2255         }
2256
2257         if (param->hwname) {
2258                 ret = nla_put(skb, HWSIM_ATTR_RADIO_NAME,
2259                               strlen(param->hwname), param->hwname);
2260                 if (ret < 0)
2261                         return ret;
2262         }
2263
2264         return 0;
2265 }
2266
2267 static void hwsim_mcast_new_radio(int id, struct genl_info *info,
2268                                   struct hwsim_new_radio_params *param)
2269 {
2270         struct sk_buff *mcast_skb;
2271         void *data;
2272
2273         mcast_skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2274         if (!mcast_skb)
2275                 return;
2276
2277         data = genlmsg_put(mcast_skb, 0, 0, &hwsim_genl_family, 0,
2278                            HWSIM_CMD_NEW_RADIO);
2279         if (!data)
2280                 goto out_err;
2281
2282         if (append_radio_msg(mcast_skb, id, param) < 0)
2283                 goto out_err;
2284
2285         genlmsg_end(mcast_skb, data);
2286
2287         hwsim_mcast_config_msg(mcast_skb, info);
2288         return;
2289
2290 out_err:
2291         genlmsg_cancel(mcast_skb, data);
2292         nlmsg_free(mcast_skb);
2293 }
2294
2295 static int mac80211_hwsim_new_radio(struct genl_info *info,
2296                                     struct hwsim_new_radio_params *param)
2297 {
2298         int err;
2299         u8 addr[ETH_ALEN];
2300         struct mac80211_hwsim_data *data;
2301         struct ieee80211_hw *hw;
2302         enum ieee80211_band band;
2303         const struct ieee80211_ops *ops = &mac80211_hwsim_ops;
2304         int idx;
2305
2306         if (WARN_ON(param->channels > 1 && !param->use_chanctx))
2307                 return -EINVAL;
2308
2309         spin_lock_bh(&hwsim_radio_lock);
2310         idx = hwsim_radio_idx++;
2311         spin_unlock_bh(&hwsim_radio_lock);
2312
2313         if (param->use_chanctx)
2314                 ops = &mac80211_hwsim_mchan_ops;
2315         hw = ieee80211_alloc_hw_nm(sizeof(*data), ops, param->hwname);
2316         if (!hw) {
2317                 printk(KERN_DEBUG "mac80211_hwsim: ieee80211_alloc_hw failed\n");
2318                 err = -ENOMEM;
2319                 goto failed;
2320         }
2321         data = hw->priv;
2322         data->hw = hw;
2323
2324         data->dev = device_create(hwsim_class, NULL, 0, hw, "hwsim%d", idx);
2325         if (IS_ERR(data->dev)) {
2326                 printk(KERN_DEBUG
2327                        "mac80211_hwsim: device_create failed (%ld)\n",
2328                        PTR_ERR(data->dev));
2329                 err = -ENOMEM;
2330                 goto failed_drvdata;
2331         }
2332         data->dev->driver = &mac80211_hwsim_driver.driver;
2333         err = device_bind_driver(data->dev);
2334         if (err != 0) {
2335                 printk(KERN_DEBUG "mac80211_hwsim: device_bind_driver failed (%d)\n",
2336                        err);
2337                 goto failed_bind;
2338         }
2339
2340         skb_queue_head_init(&data->pending);
2341
2342         SET_IEEE80211_DEV(hw, data->dev);
2343         eth_zero_addr(addr);
2344         addr[0] = 0x02;
2345         addr[3] = idx >> 8;
2346         addr[4] = idx;
2347         memcpy(data->addresses[0].addr, addr, ETH_ALEN);
2348         memcpy(data->addresses[1].addr, addr, ETH_ALEN);
2349         data->addresses[1].addr[0] |= 0x40;
2350         hw->wiphy->n_addresses = 2;
2351         hw->wiphy->addresses = data->addresses;
2352
2353         data->channels = param->channels;
2354         data->use_chanctx = param->use_chanctx;
2355         data->idx = idx;
2356         data->destroy_on_close = param->destroy_on_close;
2357         if (info)
2358                 data->portid = info->snd_portid;
2359
2360         if (data->use_chanctx) {
2361                 hw->wiphy->max_scan_ssids = 255;
2362                 hw->wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
2363                 hw->wiphy->max_remain_on_channel_duration = 1000;
2364                 /* For channels > 1 DFS is not allowed */
2365                 hw->wiphy->n_iface_combinations = 1;
2366                 hw->wiphy->iface_combinations = &data->if_combination;
2367                 if (param->p2p_device)
2368                         data->if_combination = hwsim_if_comb_p2p_dev[0];
2369                 else
2370                         data->if_combination = hwsim_if_comb[0];
2371                 data->if_combination.num_different_channels = data->channels;
2372         } else if (param->p2p_device) {
2373                 hw->wiphy->iface_combinations = hwsim_if_comb_p2p_dev;
2374                 hw->wiphy->n_iface_combinations =
2375                         ARRAY_SIZE(hwsim_if_comb_p2p_dev);
2376         } else {
2377                 hw->wiphy->iface_combinations = hwsim_if_comb;
2378                 hw->wiphy->n_iface_combinations = ARRAY_SIZE(hwsim_if_comb);
2379         }
2380
2381         INIT_DELAYED_WORK(&data->roc_done, hw_roc_done);
2382         INIT_DELAYED_WORK(&data->hw_scan, hw_scan_work);
2383
2384         hw->queues = 5;
2385         hw->offchannel_tx_hw_queue = 4;
2386         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
2387                                      BIT(NL80211_IFTYPE_AP) |
2388                                      BIT(NL80211_IFTYPE_P2P_CLIENT) |
2389                                      BIT(NL80211_IFTYPE_P2P_GO) |
2390                                      BIT(NL80211_IFTYPE_ADHOC) |
2391                                      BIT(NL80211_IFTYPE_MESH_POINT);
2392
2393         if (param->p2p_device)
2394                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_P2P_DEVICE);
2395
2396         hw->flags = IEEE80211_HW_MFP_CAPABLE |
2397                     IEEE80211_HW_SIGNAL_DBM |
2398                     IEEE80211_HW_AMPDU_AGGREGATION |
2399                     IEEE80211_HW_WANT_MONITOR_VIF |
2400                     IEEE80211_HW_QUEUE_CONTROL |
2401                     IEEE80211_HW_SUPPORTS_HT_CCK_RATES |
2402                     IEEE80211_HW_CHANCTX_STA_CSA;
2403         if (rctbl)
2404                 hw->flags |= IEEE80211_HW_SUPPORTS_RC_TABLE;
2405
2406         hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS |
2407                             WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL |
2408                             WIPHY_FLAG_AP_UAPSD |
2409                             WIPHY_FLAG_HAS_CHANNEL_SWITCH;
2410         hw->wiphy->features |= NL80211_FEATURE_ACTIVE_MONITOR |
2411                                NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE |
2412                                NL80211_FEATURE_STATIC_SMPS |
2413                                NL80211_FEATURE_DYNAMIC_SMPS |
2414                                NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR;
2415
2416         /* ask mac80211 to reserve space for magic */
2417         hw->vif_data_size = sizeof(struct hwsim_vif_priv);
2418         hw->sta_data_size = sizeof(struct hwsim_sta_priv);
2419         hw->chanctx_data_size = sizeof(struct hwsim_chanctx_priv);
2420
2421         memcpy(data->channels_2ghz, hwsim_channels_2ghz,
2422                 sizeof(hwsim_channels_2ghz));
2423         memcpy(data->channels_5ghz, hwsim_channels_5ghz,
2424                 sizeof(hwsim_channels_5ghz));
2425         memcpy(data->rates, hwsim_rates, sizeof(hwsim_rates));
2426
2427         for (band = IEEE80211_BAND_2GHZ; band < IEEE80211_NUM_BANDS; band++) {
2428                 struct ieee80211_supported_band *sband = &data->bands[band];
2429                 switch (band) {
2430                 case IEEE80211_BAND_2GHZ:
2431                         sband->channels = data->channels_2ghz;
2432                         sband->n_channels = ARRAY_SIZE(hwsim_channels_2ghz);
2433                         sband->bitrates = data->rates;
2434                         sband->n_bitrates = ARRAY_SIZE(hwsim_rates);
2435                         break;
2436                 case IEEE80211_BAND_5GHZ:
2437                         sband->channels = data->channels_5ghz;
2438                         sband->n_channels = ARRAY_SIZE(hwsim_channels_5ghz);
2439                         sband->bitrates = data->rates + 4;
2440                         sband->n_bitrates = ARRAY_SIZE(hwsim_rates) - 4;
2441                         break;
2442                 default:
2443                         continue;
2444                 }
2445
2446                 sband->ht_cap.ht_supported = true;
2447                 sband->ht_cap.cap = IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
2448                                     IEEE80211_HT_CAP_GRN_FLD |
2449                                     IEEE80211_HT_CAP_SGI_20 |
2450                                     IEEE80211_HT_CAP_SGI_40 |
2451                                     IEEE80211_HT_CAP_DSSSCCK40;
2452                 sband->ht_cap.ampdu_factor = 0x3;
2453                 sband->ht_cap.ampdu_density = 0x6;
2454                 memset(&sband->ht_cap.mcs, 0,
2455                        sizeof(sband->ht_cap.mcs));
2456                 sband->ht_cap.mcs.rx_mask[0] = 0xff;
2457                 sband->ht_cap.mcs.rx_mask[1] = 0xff;
2458                 sband->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
2459
2460                 hw->wiphy->bands[band] = sband;
2461
2462                 sband->vht_cap.vht_supported = true;
2463                 sband->vht_cap.cap =
2464                         IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454 |
2465                         IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ |
2466                         IEEE80211_VHT_CAP_RXLDPC |
2467                         IEEE80211_VHT_CAP_SHORT_GI_80 |
2468                         IEEE80211_VHT_CAP_SHORT_GI_160 |
2469                         IEEE80211_VHT_CAP_TXSTBC |
2470                         IEEE80211_VHT_CAP_RXSTBC_1 |
2471                         IEEE80211_VHT_CAP_RXSTBC_2 |
2472                         IEEE80211_VHT_CAP_RXSTBC_3 |
2473                         IEEE80211_VHT_CAP_RXSTBC_4 |
2474                         IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
2475                 sband->vht_cap.vht_mcs.rx_mcs_map =
2476                         cpu_to_le16(IEEE80211_VHT_MCS_SUPPORT_0_8 << 0 |
2477                                     IEEE80211_VHT_MCS_SUPPORT_0_8 << 2 |
2478                                     IEEE80211_VHT_MCS_SUPPORT_0_9 << 4 |
2479                                     IEEE80211_VHT_MCS_SUPPORT_0_8 << 6 |
2480                                     IEEE80211_VHT_MCS_SUPPORT_0_8 << 8 |
2481                                     IEEE80211_VHT_MCS_SUPPORT_0_9 << 10 |
2482                                     IEEE80211_VHT_MCS_SUPPORT_0_9 << 12 |
2483                                     IEEE80211_VHT_MCS_SUPPORT_0_8 << 14);
2484                 sband->vht_cap.vht_mcs.tx_mcs_map =
2485                         sband->vht_cap.vht_mcs.rx_mcs_map;
2486         }
2487
2488         /* By default all radios belong to the first group */
2489         data->group = 1;
2490         mutex_init(&data->mutex);
2491
2492         /* Enable frame retransmissions for lossy channels */
2493         hw->max_rates = 4;
2494         hw->max_rate_tries = 11;
2495
2496         hw->wiphy->vendor_commands = mac80211_hwsim_vendor_commands;
2497         hw->wiphy->n_vendor_commands =
2498                 ARRAY_SIZE(mac80211_hwsim_vendor_commands);
2499         hw->wiphy->vendor_events = mac80211_hwsim_vendor_events;
2500         hw->wiphy->n_vendor_events = ARRAY_SIZE(mac80211_hwsim_vendor_events);
2501
2502         if (param->reg_strict)
2503                 hw->wiphy->regulatory_flags |= REGULATORY_STRICT_REG;
2504         if (param->regd) {
2505                 data->regd = param->regd;
2506                 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG;
2507                 wiphy_apply_custom_regulatory(hw->wiphy, param->regd);
2508                 /* give the regulatory workqueue a chance to run */
2509                 schedule_timeout_interruptible(1);
2510         }
2511
2512         if (param->no_vif)
2513                 hw->flags |= IEEE80211_HW_NO_AUTO_VIF;
2514
2515         err = ieee80211_register_hw(hw);
2516         if (err < 0) {
2517                 printk(KERN_DEBUG "mac80211_hwsim: ieee80211_register_hw failed (%d)\n",
2518                        err);
2519                 goto failed_hw;
2520         }
2521
2522         wiphy_debug(hw->wiphy, "hwaddr %pM registered\n", hw->wiphy->perm_addr);
2523
2524         if (param->reg_alpha2) {
2525                 data->alpha2[0] = param->reg_alpha2[0];
2526                 data->alpha2[1] = param->reg_alpha2[1];
2527                 regulatory_hint(hw->wiphy, param->reg_alpha2);
2528         }
2529
2530         data->debugfs = debugfs_create_dir("hwsim", hw->wiphy->debugfsdir);
2531         debugfs_create_file("ps", 0666, data->debugfs, data, &hwsim_fops_ps);
2532         debugfs_create_file("group", 0666, data->debugfs, data,
2533                             &hwsim_fops_group);
2534         if (!data->use_chanctx)
2535                 debugfs_create_file("dfs_simulate_radar", 0222,
2536                                     data->debugfs,
2537                                     data, &hwsim_simulate_radar);
2538
2539         tasklet_hrtimer_init(&data->beacon_timer,
2540                              mac80211_hwsim_beacon,
2541                              CLOCK_MONOTONIC_RAW, HRTIMER_MODE_ABS);
2542
2543         spin_lock_bh(&hwsim_radio_lock);
2544         list_add_tail(&data->list, &hwsim_radios);
2545         spin_unlock_bh(&hwsim_radio_lock);
2546
2547         if (idx > 0)
2548                 hwsim_mcast_new_radio(idx, info, param);
2549
2550         return idx;
2551
2552 failed_hw:
2553         device_release_driver(data->dev);
2554 failed_bind:
2555         device_unregister(data->dev);
2556 failed_drvdata:
2557         ieee80211_free_hw(hw);
2558 failed:
2559         return err;
2560 }
2561
2562 static void hwsim_mcast_del_radio(int id, const char *hwname,
2563                                   struct genl_info *info)
2564 {
2565         struct sk_buff *skb;
2566         void *data;
2567         int ret;
2568
2569         skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2570         if (!skb)
2571                 return;
2572
2573         data = genlmsg_put(skb, 0, 0, &hwsim_genl_family, 0,
2574                            HWSIM_CMD_DEL_RADIO);
2575         if (!data)
2576                 goto error;
2577
2578         ret = nla_put_u32(skb, HWSIM_ATTR_RADIO_ID, id);
2579         if (ret < 0)
2580                 goto error;
2581
2582         ret = nla_put(skb, HWSIM_ATTR_RADIO_NAME, strlen(hwname),
2583                       hwname);
2584         if (ret < 0)
2585                 goto error;
2586
2587         genlmsg_end(skb, data);
2588
2589         hwsim_mcast_config_msg(skb, info);
2590
2591         return;
2592
2593 error:
2594         nlmsg_free(skb);
2595 }
2596
2597 static void mac80211_hwsim_del_radio(struct mac80211_hwsim_data *data,
2598                                      const char *hwname,
2599                                      struct genl_info *info)
2600 {
2601         hwsim_mcast_del_radio(data->idx, hwname, info);
2602         debugfs_remove_recursive(data->debugfs);
2603         ieee80211_unregister_hw(data->hw);
2604         device_release_driver(data->dev);
2605         device_unregister(data->dev);
2606         ieee80211_free_hw(data->hw);
2607 }
2608
2609 static int mac80211_hwsim_get_radio(struct sk_buff *skb,
2610                                     struct mac80211_hwsim_data *data,
2611                                     u32 portid, u32 seq,
2612                                     struct netlink_callback *cb, int flags)
2613 {
2614         void *hdr;
2615         struct hwsim_new_radio_params param = { };
2616         int res = -EMSGSIZE;
2617
2618         hdr = genlmsg_put(skb, portid, seq, &hwsim_genl_family, flags,
2619                           HWSIM_CMD_GET_RADIO);
2620         if (!hdr)
2621                 return -EMSGSIZE;
2622
2623         if (cb)
2624                 genl_dump_check_consistent(cb, hdr, &hwsim_genl_family);
2625
2626         if (data->alpha2[0] && data->alpha2[1])
2627                 param.reg_alpha2 = data->alpha2;
2628
2629         param.reg_strict = !!(data->hw->wiphy->regulatory_flags &
2630                                         REGULATORY_STRICT_REG);
2631         param.p2p_device = !!(data->hw->wiphy->interface_modes &
2632                                         BIT(NL80211_IFTYPE_P2P_DEVICE));
2633         param.use_chanctx = data->use_chanctx;
2634         param.regd = data->regd;
2635         param.channels = data->channels;
2636         param.hwname = wiphy_name(data->hw->wiphy);
2637
2638         res = append_radio_msg(skb, data->idx, &param);
2639         if (res < 0)
2640                 goto out_err;
2641
2642         genlmsg_end(skb, hdr);
2643         return 0;
2644
2645 out_err:
2646         genlmsg_cancel(skb, hdr);
2647         return res;
2648 }
2649
2650 static void mac80211_hwsim_free(void)
2651 {
2652         struct mac80211_hwsim_data *data;
2653
2654         spin_lock_bh(&hwsim_radio_lock);
2655         while ((data = list_first_entry_or_null(&hwsim_radios,
2656                                                 struct mac80211_hwsim_data,
2657                                                 list))) {
2658                 list_del(&data->list);
2659                 spin_unlock_bh(&hwsim_radio_lock);
2660                 mac80211_hwsim_del_radio(data, wiphy_name(data->hw->wiphy),
2661                                          NULL);
2662                 spin_lock_bh(&hwsim_radio_lock);
2663         }
2664         spin_unlock_bh(&hwsim_radio_lock);
2665         class_destroy(hwsim_class);
2666 }
2667
2668 static const struct net_device_ops hwsim_netdev_ops = {
2669         .ndo_start_xmit         = hwsim_mon_xmit,
2670         .ndo_change_mtu         = eth_change_mtu,
2671         .ndo_set_mac_address    = eth_mac_addr,
2672         .ndo_validate_addr      = eth_validate_addr,
2673 };
2674
2675 static void hwsim_mon_setup(struct net_device *dev)
2676 {
2677         dev->netdev_ops = &hwsim_netdev_ops;
2678         dev->destructor = free_netdev;
2679         ether_setup(dev);
2680         dev->tx_queue_len = 0;
2681         dev->type = ARPHRD_IEEE80211_RADIOTAP;
2682         eth_zero_addr(dev->dev_addr);
2683         dev->dev_addr[0] = 0x12;
2684 }
2685
2686 static struct mac80211_hwsim_data *get_hwsim_data_ref_from_addr(const u8 *addr)
2687 {
2688         struct mac80211_hwsim_data *data;
2689         bool _found = false;
2690
2691         spin_lock_bh(&hwsim_radio_lock);
2692         list_for_each_entry(data, &hwsim_radios, list) {
2693                 if (mac80211_hwsim_addr_match(data, addr)) {
2694                         _found = true;
2695                         break;
2696                 }
2697         }
2698         spin_unlock_bh(&hwsim_radio_lock);
2699
2700         if (!_found)
2701                 return NULL;
2702
2703         return data;
2704 }
2705
2706 static int hwsim_tx_info_frame_received_nl(struct sk_buff *skb_2,
2707                                            struct genl_info *info)
2708 {
2709
2710         struct ieee80211_hdr *hdr;
2711         struct mac80211_hwsim_data *data2;
2712         struct ieee80211_tx_info *txi;
2713         struct hwsim_tx_rate *tx_attempts;
2714         unsigned long ret_skb_ptr;
2715         struct sk_buff *skb, *tmp;
2716         const u8 *src;
2717         unsigned int hwsim_flags;
2718         int i;
2719         bool found = false;
2720
2721         if (info->snd_portid != wmediumd_portid)
2722                 return -EINVAL;
2723
2724         if (!info->attrs[HWSIM_ATTR_ADDR_TRANSMITTER] ||
2725             !info->attrs[HWSIM_ATTR_FLAGS] ||
2726             !info->attrs[HWSIM_ATTR_COOKIE] ||
2727             !info->attrs[HWSIM_ATTR_TX_INFO])
2728                 goto out;
2729
2730         src = (void *)nla_data(info->attrs[HWSIM_ATTR_ADDR_TRANSMITTER]);
2731         hwsim_flags = nla_get_u32(info->attrs[HWSIM_ATTR_FLAGS]);
2732         ret_skb_ptr = nla_get_u64(info->attrs[HWSIM_ATTR_COOKIE]);
2733
2734         data2 = get_hwsim_data_ref_from_addr(src);
2735         if (!data2)
2736                 goto out;
2737
2738         /* look for the skb matching the cookie passed back from user */
2739         skb_queue_walk_safe(&data2->pending, skb, tmp) {
2740                 if ((unsigned long)skb == ret_skb_ptr) {
2741                         skb_unlink(skb, &data2->pending);
2742                         found = true;
2743                         break;
2744                 }
2745         }
2746
2747         /* not found */
2748         if (!found)
2749                 goto out;
2750
2751         /* Tx info received because the frame was broadcasted on user space,
2752          so we get all the necessary info: tx attempts and skb control buff */
2753
2754         tx_attempts = (struct hwsim_tx_rate *)nla_data(
2755                        info->attrs[HWSIM_ATTR_TX_INFO]);
2756
2757         /* now send back TX status */
2758         txi = IEEE80211_SKB_CB(skb);
2759
2760         ieee80211_tx_info_clear_status(txi);
2761
2762         for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
2763                 txi->status.rates[i].idx = tx_attempts[i].idx;
2764                 txi->status.rates[i].count = tx_attempts[i].count;
2765                 /*txi->status.rates[i].flags = 0;*/
2766         }
2767
2768         txi->status.ack_signal = nla_get_u32(info->attrs[HWSIM_ATTR_SIGNAL]);
2769
2770         if (!(hwsim_flags & HWSIM_TX_CTL_NO_ACK) &&
2771            (hwsim_flags & HWSIM_TX_STAT_ACK)) {
2772                 if (skb->len >= 16) {
2773                         hdr = (struct ieee80211_hdr *) skb->data;
2774                         mac80211_hwsim_monitor_ack(data2->channel,
2775                                                    hdr->addr2);
2776                 }
2777                 txi->flags |= IEEE80211_TX_STAT_ACK;
2778         }
2779         ieee80211_tx_status_irqsafe(data2->hw, skb);
2780         return 0;
2781 out:
2782         return -EINVAL;
2783
2784 }
2785
2786 static int hwsim_cloned_frame_received_nl(struct sk_buff *skb_2,
2787                                           struct genl_info *info)
2788 {
2789         struct mac80211_hwsim_data *data2;
2790         struct ieee80211_rx_status rx_status;
2791         const u8 *dst;
2792         int frame_data_len;
2793         void *frame_data;
2794         struct sk_buff *skb = NULL;
2795
2796         if (info->snd_portid != wmediumd_portid)
2797                 return -EINVAL;
2798
2799         if (!info->attrs[HWSIM_ATTR_ADDR_RECEIVER] ||
2800             !info->attrs[HWSIM_ATTR_FRAME] ||
2801             !info->attrs[HWSIM_ATTR_RX_RATE] ||
2802             !info->attrs[HWSIM_ATTR_SIGNAL])
2803                 goto out;
2804
2805         dst = (void *)nla_data(info->attrs[HWSIM_ATTR_ADDR_RECEIVER]);
2806         frame_data_len = nla_len(info->attrs[HWSIM_ATTR_FRAME]);
2807         frame_data = (void *)nla_data(info->attrs[HWSIM_ATTR_FRAME]);
2808
2809         /* Allocate new skb here */
2810         skb = alloc_skb(frame_data_len, GFP_KERNEL);
2811         if (skb == NULL)
2812                 goto err;
2813
2814         if (frame_data_len > IEEE80211_MAX_DATA_LEN)
2815                 goto err;
2816
2817         /* Copy the data */
2818         memcpy(skb_put(skb, frame_data_len), frame_data, frame_data_len);
2819
2820         data2 = get_hwsim_data_ref_from_addr(dst);
2821         if (!data2)
2822                 goto out;
2823
2824         /* check if radio is configured properly */
2825
2826         if (data2->idle || !data2->started)
2827                 goto out;
2828
2829         /* A frame is received from user space */
2830         memset(&rx_status, 0, sizeof(rx_status));
2831         /* TODO: Check ATTR_FREQ if it exists, and maybe throw away off-channel
2832          * packets?
2833          */
2834         rx_status.freq = data2->channel->center_freq;
2835         rx_status.band = data2->channel->band;
2836         rx_status.rate_idx = nla_get_u32(info->attrs[HWSIM_ATTR_RX_RATE]);
2837         rx_status.signal = nla_get_u32(info->attrs[HWSIM_ATTR_SIGNAL]);
2838
2839         memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
2840         data2->rx_pkts++;
2841         data2->rx_bytes += skb->len;
2842         ieee80211_rx_irqsafe(data2->hw, skb);
2843
2844         return 0;
2845 err:
2846         printk(KERN_DEBUG "mac80211_hwsim: error occurred in %s\n", __func__);
2847 out:
2848         dev_kfree_skb(skb);
2849         return -EINVAL;
2850 }
2851
2852 static int hwsim_register_received_nl(struct sk_buff *skb_2,
2853                                       struct genl_info *info)
2854 {
2855         struct mac80211_hwsim_data *data;
2856         int chans = 1;
2857
2858         spin_lock_bh(&hwsim_radio_lock);
2859         list_for_each_entry(data, &hwsim_radios, list)
2860                 chans = max(chans, data->channels);
2861         spin_unlock_bh(&hwsim_radio_lock);
2862
2863         /* In the future we should revise the userspace API and allow it
2864          * to set a flag that it does support multi-channel, then we can
2865          * let this pass conditionally on the flag.
2866          * For current userspace, prohibit it since it won't work right.
2867          */
2868         if (chans > 1)
2869                 return -EOPNOTSUPP;
2870
2871         if (wmediumd_portid)
2872                 return -EBUSY;
2873
2874         wmediumd_portid = info->snd_portid;
2875
2876         printk(KERN_DEBUG "mac80211_hwsim: received a REGISTER, "
2877                "switching to wmediumd mode with pid %d\n", info->snd_portid);
2878
2879         return 0;
2880 }
2881
2882 static int hwsim_new_radio_nl(struct sk_buff *msg, struct genl_info *info)
2883 {
2884         struct hwsim_new_radio_params param = { 0 };
2885
2886         param.reg_strict = info->attrs[HWSIM_ATTR_REG_STRICT_REG];
2887         param.p2p_device = info->attrs[HWSIM_ATTR_SUPPORT_P2P_DEVICE];
2888         param.channels = channels;
2889         param.destroy_on_close =
2890                 info->attrs[HWSIM_ATTR_DESTROY_RADIO_ON_CLOSE];
2891
2892         if (info->attrs[HWSIM_ATTR_CHANNELS])
2893                 param.channels = nla_get_u32(info->attrs[HWSIM_ATTR_CHANNELS]);
2894
2895         if (info->attrs[HWSIM_ATTR_NO_VIF])
2896                 param.no_vif = true;
2897
2898         if (info->attrs[HWSIM_ATTR_RADIO_NAME])
2899                 param.hwname = nla_data(info->attrs[HWSIM_ATTR_RADIO_NAME]);
2900
2901         if (info->attrs[HWSIM_ATTR_USE_CHANCTX])
2902                 param.use_chanctx = true;
2903         else
2904                 param.use_chanctx = (param.channels > 1);
2905
2906         if (info->attrs[HWSIM_ATTR_REG_HINT_ALPHA2])
2907                 param.reg_alpha2 =
2908                         nla_data(info->attrs[HWSIM_ATTR_REG_HINT_ALPHA2]);
2909
2910         if (info->attrs[HWSIM_ATTR_REG_CUSTOM_REG]) {
2911                 u32 idx = nla_get_u32(info->attrs[HWSIM_ATTR_REG_CUSTOM_REG]);
2912
2913                 if (idx >= ARRAY_SIZE(hwsim_world_regdom_custom))
2914                         return -EINVAL;
2915                 param.regd = hwsim_world_regdom_custom[idx];
2916         }
2917
2918         return mac80211_hwsim_new_radio(info, &param);
2919 }
2920
2921 static int hwsim_del_radio_nl(struct sk_buff *msg, struct genl_info *info)
2922 {
2923         struct mac80211_hwsim_data *data;
2924         s64 idx = -1;
2925         const char *hwname = NULL;
2926
2927         if (info->attrs[HWSIM_ATTR_RADIO_ID])
2928                 idx = nla_get_u32(info->attrs[HWSIM_ATTR_RADIO_ID]);
2929         else if (info->attrs[HWSIM_ATTR_RADIO_NAME])
2930                 hwname = (void *)nla_data(info->attrs[HWSIM_ATTR_RADIO_NAME]);
2931         else
2932                 return -EINVAL;
2933
2934         spin_lock_bh(&hwsim_radio_lock);
2935         list_for_each_entry(data, &hwsim_radios, list) {
2936                 if (idx >= 0) {
2937                         if (data->idx != idx)
2938                                 continue;
2939                 } else {
2940                         if (strcmp(hwname, wiphy_name(data->hw->wiphy)))
2941                                 continue;
2942                 }
2943
2944                 list_del(&data->list);
2945                 spin_unlock_bh(&hwsim_radio_lock);
2946                 mac80211_hwsim_del_radio(data, wiphy_name(data->hw->wiphy),
2947                                          info);
2948                 return 0;
2949         }
2950         spin_unlock_bh(&hwsim_radio_lock);
2951
2952         return -ENODEV;
2953 }
2954
2955 static int hwsim_get_radio_nl(struct sk_buff *msg, struct genl_info *info)
2956 {
2957         struct mac80211_hwsim_data *data;
2958         struct sk_buff *skb;
2959         int idx, res = -ENODEV;
2960
2961         if (!info->attrs[HWSIM_ATTR_RADIO_ID])
2962                 return -EINVAL;
2963         idx = nla_get_u32(info->attrs[HWSIM_ATTR_RADIO_ID]);
2964
2965         spin_lock_bh(&hwsim_radio_lock);
2966         list_for_each_entry(data, &hwsim_radios, list) {
2967                 if (data->idx != idx)
2968                         continue;
2969
2970                 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2971                 if (!skb) {
2972                         res = -ENOMEM;
2973                         goto out_err;
2974                 }
2975
2976                 res = mac80211_hwsim_get_radio(skb, data, info->snd_portid,
2977                                                info->snd_seq, NULL, 0);
2978                 if (res < 0) {
2979                         nlmsg_free(skb);
2980                         goto out_err;
2981                 }
2982
2983                 genlmsg_reply(skb, info);
2984                 break;
2985         }
2986
2987 out_err:
2988         spin_unlock_bh(&hwsim_radio_lock);
2989
2990         return res;
2991 }
2992
2993 static int hwsim_dump_radio_nl(struct sk_buff *skb,
2994                                struct netlink_callback *cb)
2995 {
2996         int idx = cb->args[0];
2997         struct mac80211_hwsim_data *data = NULL;
2998         int res;
2999
3000         spin_lock_bh(&hwsim_radio_lock);
3001
3002         if (idx == hwsim_radio_idx)
3003                 goto done;
3004
3005         list_for_each_entry(data, &hwsim_radios, list) {
3006                 if (data->idx < idx)
3007                         continue;
3008
3009                 res = mac80211_hwsim_get_radio(skb, data,
3010                                                NETLINK_CB(cb->skb).portid,
3011                                                cb->nlh->nlmsg_seq, cb,
3012                                                NLM_F_MULTI);
3013                 if (res < 0)
3014                         break;
3015
3016                 idx = data->idx + 1;
3017         }
3018
3019         cb->args[0] = idx;
3020
3021 done:
3022         spin_unlock_bh(&hwsim_radio_lock);
3023         return skb->len;
3024 }
3025
3026 /* Generic Netlink operations array */
3027 static const struct genl_ops hwsim_ops[] = {
3028         {
3029                 .cmd = HWSIM_CMD_REGISTER,
3030                 .policy = hwsim_genl_policy,
3031                 .doit = hwsim_register_received_nl,
3032                 .flags = GENL_ADMIN_PERM,
3033         },
3034         {
3035                 .cmd = HWSIM_CMD_FRAME,
3036                 .policy = hwsim_genl_policy,
3037                 .doit = hwsim_cloned_frame_received_nl,
3038         },
3039         {
3040                 .cmd = HWSIM_CMD_TX_INFO_FRAME,
3041                 .policy = hwsim_genl_policy,
3042                 .doit = hwsim_tx_info_frame_received_nl,
3043         },
3044         {
3045                 .cmd = HWSIM_CMD_NEW_RADIO,
3046                 .policy = hwsim_genl_policy,
3047                 .doit = hwsim_new_radio_nl,
3048                 .flags = GENL_ADMIN_PERM,
3049         },
3050         {
3051                 .cmd = HWSIM_CMD_DEL_RADIO,
3052                 .policy = hwsim_genl_policy,
3053                 .doit = hwsim_del_radio_nl,
3054                 .flags = GENL_ADMIN_PERM,
3055         },
3056         {
3057                 .cmd = HWSIM_CMD_GET_RADIO,
3058                 .policy = hwsim_genl_policy,
3059                 .doit = hwsim_get_radio_nl,
3060                 .dumpit = hwsim_dump_radio_nl,
3061         },
3062 };
3063
3064 static void destroy_radio(struct work_struct *work)
3065 {
3066         struct mac80211_hwsim_data *data =
3067                 container_of(work, struct mac80211_hwsim_data, destroy_work);
3068
3069         mac80211_hwsim_del_radio(data, wiphy_name(data->hw->wiphy), NULL);
3070 }
3071
3072 static void remove_user_radios(u32 portid)
3073 {
3074         struct mac80211_hwsim_data *entry, *tmp;
3075
3076         spin_lock_bh(&hwsim_radio_lock);
3077         list_for_each_entry_safe(entry, tmp, &hwsim_radios, list) {
3078                 if (entry->destroy_on_close && entry->portid == portid) {
3079                         list_del(&entry->list);
3080                         INIT_WORK(&entry->destroy_work, destroy_radio);
3081                         schedule_work(&entry->destroy_work);
3082                 }
3083         }
3084         spin_unlock_bh(&hwsim_radio_lock);
3085 }
3086
3087 static int mac80211_hwsim_netlink_notify(struct notifier_block *nb,
3088                                          unsigned long state,
3089                                          void *_notify)
3090 {
3091         struct netlink_notify *notify = _notify;
3092
3093         if (state != NETLINK_URELEASE)
3094                 return NOTIFY_DONE;
3095
3096         remove_user_radios(notify->portid);
3097
3098         if (notify->portid == wmediumd_portid) {
3099                 printk(KERN_INFO "mac80211_hwsim: wmediumd released netlink"
3100                        " socket, switching to perfect channel medium\n");
3101                 wmediumd_portid = 0;
3102         }
3103         return NOTIFY_DONE;
3104
3105 }
3106
3107 static struct notifier_block hwsim_netlink_notifier = {
3108         .notifier_call = mac80211_hwsim_netlink_notify,
3109 };
3110
3111 static int hwsim_init_netlink(void)
3112 {
3113         int rc;
3114
3115         printk(KERN_INFO "mac80211_hwsim: initializing netlink\n");
3116
3117         rc = genl_register_family_with_ops_groups(&hwsim_genl_family,
3118                                                   hwsim_ops,
3119                                                   hwsim_mcgrps);
3120         if (rc)
3121                 goto failure;
3122
3123         rc = netlink_register_notifier(&hwsim_netlink_notifier);
3124         if (rc)
3125                 goto failure;
3126
3127         return 0;
3128
3129 failure:
3130         printk(KERN_DEBUG "mac80211_hwsim: error occurred in %s\n", __func__);
3131         return -EINVAL;
3132 }
3133
3134 static void hwsim_exit_netlink(void)
3135 {
3136         /* unregister the notifier */
3137         netlink_unregister_notifier(&hwsim_netlink_notifier);
3138         /* unregister the family */
3139         genl_unregister_family(&hwsim_genl_family);
3140 }
3141
3142 static int __init init_mac80211_hwsim(void)
3143 {
3144         int i, err;
3145
3146         if (radios < 0 || radios > 100)
3147                 return -EINVAL;
3148
3149         if (channels < 1)
3150                 return -EINVAL;
3151
3152         mac80211_hwsim_mchan_ops = mac80211_hwsim_ops;
3153         mac80211_hwsim_mchan_ops.hw_scan = mac80211_hwsim_hw_scan;
3154         mac80211_hwsim_mchan_ops.cancel_hw_scan = mac80211_hwsim_cancel_hw_scan;
3155         mac80211_hwsim_mchan_ops.sw_scan_start = NULL;
3156         mac80211_hwsim_mchan_ops.sw_scan_complete = NULL;
3157         mac80211_hwsim_mchan_ops.remain_on_channel = mac80211_hwsim_roc;
3158         mac80211_hwsim_mchan_ops.cancel_remain_on_channel = mac80211_hwsim_croc;
3159         mac80211_hwsim_mchan_ops.add_chanctx = mac80211_hwsim_add_chanctx;
3160         mac80211_hwsim_mchan_ops.remove_chanctx = mac80211_hwsim_remove_chanctx;
3161         mac80211_hwsim_mchan_ops.change_chanctx = mac80211_hwsim_change_chanctx;
3162         mac80211_hwsim_mchan_ops.assign_vif_chanctx =
3163                 mac80211_hwsim_assign_vif_chanctx;
3164         mac80211_hwsim_mchan_ops.unassign_vif_chanctx =
3165                 mac80211_hwsim_unassign_vif_chanctx;
3166
3167         spin_lock_init(&hwsim_radio_lock);
3168         INIT_LIST_HEAD(&hwsim_radios);
3169
3170         err = platform_driver_register(&mac80211_hwsim_driver);
3171         if (err)
3172                 return err;
3173
3174         hwsim_class = class_create(THIS_MODULE, "mac80211_hwsim");
3175         if (IS_ERR(hwsim_class)) {
3176                 err = PTR_ERR(hwsim_class);
3177                 goto out_unregister_driver;
3178         }
3179
3180         err = hwsim_init_netlink();
3181         if (err < 0)
3182                 goto out_unregister_driver;
3183
3184         for (i = 0; i < radios; i++) {
3185                 struct hwsim_new_radio_params param = { 0 };
3186
3187                 param.channels = channels;
3188
3189                 switch (regtest) {
3190                 case HWSIM_REGTEST_DIFF_COUNTRY:
3191                         if (i < ARRAY_SIZE(hwsim_alpha2s))
3192                                 param.reg_alpha2 = hwsim_alpha2s[i];
3193                         break;
3194                 case HWSIM_REGTEST_DRIVER_REG_FOLLOW:
3195                         if (!i)
3196                                 param.reg_alpha2 = hwsim_alpha2s[0];
3197                         break;
3198                 case HWSIM_REGTEST_STRICT_ALL:
3199                         param.reg_strict = true;
3200                 case HWSIM_REGTEST_DRIVER_REG_ALL:
3201                         param.reg_alpha2 = hwsim_alpha2s[0];
3202                         break;
3203                 case HWSIM_REGTEST_WORLD_ROAM:
3204                         if (i == 0)
3205                                 param.regd = &hwsim_world_regdom_custom_01;
3206                         break;
3207                 case HWSIM_REGTEST_CUSTOM_WORLD:
3208                         param.regd = &hwsim_world_regdom_custom_01;
3209                         break;
3210                 case HWSIM_REGTEST_CUSTOM_WORLD_2:
3211                         if (i == 0)
3212                                 param.regd = &hwsim_world_regdom_custom_01;
3213                         else if (i == 1)
3214                                 param.regd = &hwsim_world_regdom_custom_02;
3215                         break;
3216                 case HWSIM_REGTEST_STRICT_FOLLOW:
3217                         if (i == 0) {
3218                                 param.reg_strict = true;
3219                                 param.reg_alpha2 = hwsim_alpha2s[0];
3220                         }
3221                         break;
3222                 case HWSIM_REGTEST_STRICT_AND_DRIVER_REG:
3223                         if (i == 0) {
3224                                 param.reg_strict = true;
3225                                 param.reg_alpha2 = hwsim_alpha2s[0];
3226                         } else if (i == 1) {
3227                                 param.reg_alpha2 = hwsim_alpha2s[1];
3228                         }
3229                         break;
3230                 case HWSIM_REGTEST_ALL:
3231                         switch (i) {
3232                         case 0:
3233                                 param.regd = &hwsim_world_regdom_custom_01;
3234                                 break;
3235                         case 1:
3236                                 param.regd = &hwsim_world_regdom_custom_02;
3237                                 break;
3238                         case 2:
3239                                 param.reg_alpha2 = hwsim_alpha2s[0];
3240                                 break;
3241                         case 3:
3242                                 param.reg_alpha2 = hwsim_alpha2s[1];
3243                                 break;
3244                         case 4:
3245                                 param.reg_strict = true;
3246                                 param.reg_alpha2 = hwsim_alpha2s[2];
3247                                 break;
3248                         }
3249                         break;
3250                 default:
3251                         break;
3252                 }
3253
3254                 param.p2p_device = support_p2p_device;
3255                 param.use_chanctx = channels > 1;
3256
3257                 err = mac80211_hwsim_new_radio(NULL, &param);
3258                 if (err < 0)
3259                         goto out_free_radios;
3260         }
3261
3262         hwsim_mon = alloc_netdev(0, "hwsim%d", NET_NAME_UNKNOWN,
3263                                  hwsim_mon_setup);
3264         if (hwsim_mon == NULL) {
3265                 err = -ENOMEM;
3266                 goto out_free_radios;
3267         }
3268
3269         rtnl_lock();
3270         err = dev_alloc_name(hwsim_mon, hwsim_mon->name);
3271         if (err < 0) {
3272                 rtnl_unlock();
3273                 goto out_free_radios;
3274         }
3275
3276         err = register_netdevice(hwsim_mon);
3277         if (err < 0) {
3278                 rtnl_unlock();
3279                 goto out_free_mon;
3280         }
3281         rtnl_unlock();
3282
3283         return 0;
3284
3285 out_free_mon:
3286         free_netdev(hwsim_mon);
3287 out_free_radios:
3288         mac80211_hwsim_free();
3289 out_unregister_driver:
3290         platform_driver_unregister(&mac80211_hwsim_driver);
3291         return err;
3292 }
3293 module_init(init_mac80211_hwsim);
3294
3295 static void __exit exit_mac80211_hwsim(void)
3296 {
3297         printk(KERN_DEBUG "mac80211_hwsim: unregister radios\n");
3298
3299         hwsim_exit_netlink();
3300
3301         mac80211_hwsim_free();
3302         unregister_netdev(hwsim_mon);
3303         platform_driver_unregister(&mac80211_hwsim_driver);
3304 }
3305 module_exit(exit_mac80211_hwsim);