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         if (val == PS_MANUAL_POLL) {
 703                 if (data->ps != PS_ENABLED)
 704                         return -EINVAL;
 705                 local_bh_disable();
 706                 ieee80211_iterate_active_interfaces_atomic(
 707                         data->hw, IEEE80211_IFACE_ITER_NORMAL,
 708                         hwsim_send_ps_poll, data);
 709                 local_bh_enable();
 710                 return 0;
 711         }
 712         old_ps = data->ps;
 713         data->ps = val;
 714
 715         local_bh_disable();
 716         if (old_ps == PS_DISABLED && val != PS_DISABLED) {
 717                 ieee80211_iterate_active_interfaces_atomic(
 718                         data->hw, IEEE80211_IFACE_ITER_NORMAL,
 719                         hwsim_send_nullfunc_ps, data);
 720         } else if (old_ps != PS_DISABLED && val == PS_DISABLED) {
 721                 ieee80211_iterate_active_interfaces_atomic(
 722                         data->hw, IEEE80211_IFACE_ITER_NORMAL,
 723                         hwsim_send_nullfunc_no_ps, data);
 724         }
 725         local_bh_enable();
 726
 727         return 0;
 728 }
 729
 730 DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_ps, hwsim_fops_ps_read, hwsim_fops_ps_write,
 731                         "%llu\n");
 732
 733 static int hwsim_write_simulate_radar(void *dat, u64 val)
 734 {
 735         struct mac80211_hwsim_data *data = dat;
 736
 737         ieee80211_radar_detected(data->hw);
 738
 739         return 0;
 740 }
 741
 742 DEFINE_SIMPLE_ATTRIBUTE(hwsim_simulate_radar, NULL,
 743                         hwsim_write_simulate_radar, "%llu\n");
 744
 745 static int hwsim_fops_group_read(void *dat, u64 *val)
 746 {
 747         struct mac80211_hwsim_data *data = dat;
 748         *val = data->group;
 749         return 0;
 750 }
 751
 752 static int hwsim_fops_group_write(void *dat, u64 val)
 753 {
 754         struct mac80211_hwsim_data *data = dat;
 755         data->group = val;
 756         return 0;
 757 }
 758
 759 DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_group,
 760                         hwsim_fops_group_read, hwsim_fops_group_write,
 761                         "%llx\n");
 762
 763 static netdev_tx_t hwsim_mon_xmit(struct sk_buff *skb,
 764                                         struct net_device *dev)
 765 {
 766         /* TODO: allow packet injection */
 767         dev_kfree_skb(skb);
 768         return NETDEV_TX_OK;
 769 }
 770
 771 static inline u64 mac80211_hwsim_get_tsf_raw(void)
 772 {
 773         return ktime_to_us(ktime_get_real());
 774 }
 775
 776 static __le64 __mac80211_hwsim_get_tsf(struct mac80211_hwsim_data *data)
 777 {
 778         u64 now = mac80211_hwsim_get_tsf_raw();
 779         return cpu_to_le64(now + data->tsf_offset);
 780 }
 781
 782 static u64 mac80211_hwsim_get_tsf(struct ieee80211_hw *hw,
 783                                   struct ieee80211_vif *vif)
 784 {
 785         struct mac80211_hwsim_data *data = hw->priv;
 786         return le64_to_cpu(__mac80211_hwsim_get_tsf(data));
 787 }
 788
 789 static void mac80211_hwsim_set_tsf(struct ieee80211_hw *hw,
 790                 struct ieee80211_vif *vif, u64 tsf)
 791 {
 792         struct mac80211_hwsim_data *data = hw->priv;
 793         u64 now = mac80211_hwsim_get_tsf(hw, vif);
 794         u32 bcn_int = data->beacon_int;
 795         u64 delta = abs(tsf - now);
 796
 797         /* adjust after beaconing with new timestamp at old TBTT */
 798         if (tsf > now) {
 799                 data->tsf_offset += delta;
 800                 data->bcn_delta = do_div(delta, bcn_int);
 801         } else {
 802                 data->tsf_offset -= delta;
 803                 data->bcn_delta = -do_div(delta, bcn_int);
 804         }
 805 }
 806
 807 static void mac80211_hwsim_monitor_rx(struct ieee80211_hw *hw,
 808                                       struct sk_buff *tx_skb,
 809                                       struct ieee80211_channel *chan)
 810 {
 811         struct mac80211_hwsim_data *data = hw->priv;
 812         struct sk_buff *skb;
 813         struct hwsim_radiotap_hdr *hdr;
 814         u16 flags;
 815         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_skb);
 816         struct ieee80211_rate *txrate = ieee80211_get_tx_rate(hw, info);
 817
 818         if (!netif_running(hwsim_mon))
 819                 return;
 820
 821         skb = skb_copy_expand(tx_skb, sizeof(*hdr), 0, GFP_ATOMIC);
 822         if (skb == NULL)
 823                 return;
 824
 825         hdr = (struct hwsim_radiotap_hdr *) skb_push(skb, sizeof(*hdr));
 826         hdr->hdr.it_version = PKTHDR_RADIOTAP_VERSION;
 827         hdr->hdr.it_pad = 0;
 828         hdr->hdr.it_len = cpu_to_le16(sizeof(*hdr));
 829         hdr->hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
 830                                           (1 << IEEE80211_RADIOTAP_RATE) |
 831                                           (1 << IEEE80211_RADIOTAP_TSFT) |
 832                                           (1 << IEEE80211_RADIOTAP_CHANNEL));
 833         hdr->rt_tsft = __mac80211_hwsim_get_tsf(data);
 834         hdr->rt_flags = 0;
 835         hdr->rt_rate = txrate->bitrate / 5;
 836         hdr->rt_channel = cpu_to_le16(chan->center_freq);
 837         flags = IEEE80211_CHAN_2GHZ;
 838         if (txrate->flags & IEEE80211_RATE_ERP_G)
 839                 flags |= IEEE80211_CHAN_OFDM;
 840         else
 841                 flags |= IEEE80211_CHAN_CCK;
 842         hdr->rt_chbitmask = cpu_to_le16(flags);
 843
 844         skb->dev = hwsim_mon;
 845         skb_set_mac_header(skb, 0);
 846         skb->ip_summed = CHECKSUM_UNNECESSARY;
 847         skb->pkt_type = PACKET_OTHERHOST;
 848         skb->protocol = htons(ETH_P_802_2);
 849         memset(skb->cb, 0, sizeof(skb->cb));
 850         netif_rx(skb);
 851 }
 852
 853
 854 static void mac80211_hwsim_monitor_ack(struct ieee80211_channel *chan,
 855                                        const u8 *addr)
 856 {
 857         struct sk_buff *skb;
 858         struct hwsim_radiotap_ack_hdr *hdr;
 859         u16 flags;
 860         struct ieee80211_hdr *hdr11;
 861
 862         if (!netif_running(hwsim_mon))
 863                 return;
 864
 865         skb = dev_alloc_skb(100);
 866         if (skb == NULL)
 867                 return;
 868
 869         hdr = (struct hwsim_radiotap_ack_hdr *) skb_put(skb, sizeof(*hdr));
 870         hdr->hdr.it_version = PKTHDR_RADIOTAP_VERSION;
 871         hdr->hdr.it_pad = 0;
 872         hdr->hdr.it_len = cpu_to_le16(sizeof(*hdr));
 873         hdr->hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
 874                                           (1 << IEEE80211_RADIOTAP_CHANNEL));
 875         hdr->rt_flags = 0;
 876         hdr->pad = 0;
 877         hdr->rt_channel = cpu_to_le16(chan->center_freq);
 878         flags = IEEE80211_CHAN_2GHZ;
 879         hdr->rt_chbitmask = cpu_to_le16(flags);
 880
 881         hdr11 = (struct ieee80211_hdr *) skb_put(skb, 10);
 882         hdr11->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
 883                                            IEEE80211_STYPE_ACK);
 884         hdr11->duration_id = cpu_to_le16(0);
 885         memcpy(hdr11->addr1, addr, ETH_ALEN);
 886
 887         skb->dev = hwsim_mon;
 888         skb_set_mac_header(skb, 0);
 889         skb->ip_summed = CHECKSUM_UNNECESSARY;
 890         skb->pkt_type = PACKET_OTHERHOST;
 891         skb->protocol = htons(ETH_P_802_2);
 892         memset(skb->cb, 0, sizeof(skb->cb));
 893         netif_rx(skb);
 894 }
 895
 896 struct mac80211_hwsim_addr_match_data {
 897         u8 addr[ETH_ALEN];
 898         bool ret;
 899 };
 900
 901 static void mac80211_hwsim_addr_iter(void *data, u8 *mac,
 902                                      struct ieee80211_vif *vif)
 903 {
 904         struct mac80211_hwsim_addr_match_data *md = data;
 905
 906         if (memcmp(mac, md->addr, ETH_ALEN) == 0)
 907                 md->ret = true;
 908 }
 909
 910 static bool mac80211_hwsim_addr_match(struct mac80211_hwsim_data *data,
 911                                       const u8 *addr)
 912 {
 913         struct mac80211_hwsim_addr_match_data md = {
 914                 .ret = false,
 915         };
 916
 917         if (data->scanning && memcmp(addr, data->scan_addr, ETH_ALEN) == 0)
 918                 return true;
 919
 920         memcpy(md.addr, addr, ETH_ALEN);
 921
 922         ieee80211_iterate_active_interfaces_atomic(data->hw,
 923                                                    IEEE80211_IFACE_ITER_NORMAL,
 924                                                    mac80211_hwsim_addr_iter,
 925                                                    &md);
 926
 927         return md.ret;
 928 }
 929
 930 static bool hwsim_ps_rx_ok(struct mac80211_hwsim_data *data,
 931                            struct sk_buff *skb)
 932 {
 933         switch (data->ps) {
 934         case PS_DISABLED:
 935                 return true;
 936         case PS_ENABLED:
 937                 return false;
 938         case PS_AUTO_POLL:
 939                 /* TODO: accept (some) Beacons by default and other frames only
 940                  * if pending PS-Poll has been sent */
 941                 return true;
 942         case PS_MANUAL_POLL:
 943                 /* Allow unicast frames to own address if there is a pending
 944                  * PS-Poll */
 945                 if (data->ps_poll_pending &&
 946                     mac80211_hwsim_addr_match(data, skb->data + 4)) {
 947                         data->ps_poll_pending = false;
 948                         return true;
 949                 }
 950                 return false;
 951         }
 952
 953         return true;
 954 }
 955
 956 static void mac80211_hwsim_tx_frame_nl(struct ieee80211_hw *hw,
 957                                        struct sk_buff *my_skb,
 958                                        int dst_portid)
 959 {
 960         struct sk_buff *skb;
 961         struct mac80211_hwsim_data *data = hw->priv;
 962         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) my_skb->data;
 963         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(my_skb);
 964         void *msg_head;
 965         unsigned int hwsim_flags = 0;
 966         int i;
 967         struct hwsim_tx_rate tx_attempts[IEEE80211_TX_MAX_RATES];
 968
 969         if (data->ps != PS_DISABLED)
 970                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 971         /* If the queue contains MAX_QUEUE skb's drop some */
 972         if (skb_queue_len(&data->pending) >= MAX_QUEUE) {
 973                 /* Droping until WARN_QUEUE level */
 974                 while (skb_queue_len(&data->pending) >= WARN_QUEUE) {
 975                         ieee80211_free_txskb(hw, skb_dequeue(&data->pending));
 976                         data->tx_dropped++;
 977                 }
 978         }
 979
 980         skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_ATOMIC);
 981         if (skb == NULL)
 982                 goto nla_put_failure;
 983
 984         msg_head = genlmsg_put(skb, 0, 0, &hwsim_genl_family, 0,
 985                                HWSIM_CMD_FRAME);
 986         if (msg_head == NULL) {
 987                 printk(KERN_DEBUG "mac80211_hwsim: problem with msg_head\n");
 988                 goto nla_put_failure;
 989         }
 990
 991         if (nla_put(skb, HWSIM_ATTR_ADDR_TRANSMITTER, ETH_ALEN, hdr->addr2))
 992                 goto nla_put_failure;
 993
 994         /* We get the skb->data */
 995         if (nla_put(skb, HWSIM_ATTR_FRAME, my_skb->len, my_skb->data))
 996                 goto nla_put_failure;
 997
 998         /* We get the flags for this transmission, and we translate them to
 999            wmediumd flags  */
1000
1001         if (info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS)
1002                 hwsim_flags |= HWSIM_TX_CTL_REQ_TX_STATUS;
1003
1004         if (info->flags & IEEE80211_TX_CTL_NO_ACK)
1005                 hwsim_flags |= HWSIM_TX_CTL_NO_ACK;
1006
1007         if (nla_put_u32(skb, HWSIM_ATTR_FLAGS, hwsim_flags))
1008                 goto nla_put_failure;
1009
1010         if (nla_put_u32(skb, HWSIM_ATTR_FREQ, data->channel->center_freq))
1011                 goto nla_put_failure;
1012
1013         /* We get the tx control (rate and retries) info*/
1014
1015         for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
1016                 tx_attempts[i].idx = info->status.rates[i].idx;
1017                 tx_attempts[i].count = info->status.rates[i].count;
1018         }
1019
1020         if (nla_put(skb, HWSIM_ATTR_TX_INFO,
1021                     sizeof(struct hwsim_tx_rate)*IEEE80211_TX_MAX_RATES,
1022                     tx_attempts))
1023                 goto nla_put_failure;
1024
1025         /* We create a cookie to identify this skb */
1026         if (nla_put_u64(skb, HWSIM_ATTR_COOKIE, (unsigned long) my_skb))
1027                 goto nla_put_failure;
1028
1029         genlmsg_end(skb, msg_head);
1030         if (genlmsg_unicast(&init_net, skb, dst_portid))
1031                 goto err_free_txskb;
1032
1033         /* Enqueue the packet */
1034         skb_queue_tail(&data->pending, my_skb);
1035         data->tx_pkts++;
1036         data->tx_bytes += my_skb->len;
1037         return;
1038
1039 nla_put_failure:
1040         nlmsg_free(skb);
1041 err_free_txskb:
1042         printk(KERN_DEBUG "mac80211_hwsim: error occurred in %s\n", __func__);
1043         ieee80211_free_txskb(hw, my_skb);
1044         data->tx_failed++;
1045 }
1046
1047 static bool hwsim_chans_compat(struct ieee80211_channel *c1,
1048                                struct ieee80211_channel *c2)
1049 {
1050         if (!c1 || !c2)
1051                 return false;
1052
1053         return c1->center_freq == c2->center_freq;
1054 }
1055
1056 struct tx_iter_data {
1057         struct ieee80211_channel *channel;
1058         bool receive;
1059 };
1060
1061 static void mac80211_hwsim_tx_iter(void *_data, u8 *addr,
1062                                    struct ieee80211_vif *vif)
1063 {
1064         struct tx_iter_data *data = _data;
1065
1066         if (!vif->chanctx_conf)
1067                 return;
1068
1069         if (!hwsim_chans_compat(data->channel,
1070                                 rcu_dereference(vif->chanctx_conf)->def.chan))
1071                 return;
1072
1073         data->receive = true;
1074 }
1075
1076 static void mac80211_hwsim_add_vendor_rtap(struct sk_buff *skb)
1077 {
1078         /*
1079          * To enable this code, #define the HWSIM_RADIOTAP_OUI,
1080          * e.g. like this:
1081          * #define HWSIM_RADIOTAP_OUI "\x02\x00\x00"
1082          * (but you should use a valid OUI, not that)
1083          *
1084          * If anyone wants to 'donate' a radiotap OUI/subns code
1085          * please send a patch removing this #ifdef and changing
1086          * the values accordingly.
1087          */
1088 #ifdef HWSIM_RADIOTAP_OUI
1089         struct ieee80211_vendor_radiotap *rtap;
1090
1091         /*
1092          * Note that this code requires the headroom in the SKB
1093          * that was allocated earlier.
1094          */
1095         rtap = (void *)skb_push(skb, sizeof(*rtap) + 8 + 4);
1096         rtap->oui[0] = HWSIM_RADIOTAP_OUI[0];
1097         rtap->oui[1] = HWSIM_RADIOTAP_OUI[1];
1098         rtap->oui[2] = HWSIM_RADIOTAP_OUI[2];
1099         rtap->subns = 127;
1100
1101         /*
1102          * Radiotap vendor namespaces can (and should) also be
1103          * split into fields by using the standard radiotap
1104          * presence bitmap mechanism. Use just BIT(0) here for
1105          * the presence bitmap.
1106          */
1107         rtap->present = BIT(0);
1108         /* We have 8 bytes of (dummy) data */
1109         rtap->len = 8;
1110         /* For testing, also require it to be aligned */
1111         rtap->align = 8;
1112         /* And also test that padding works, 4 bytes */
1113         rtap->pad = 4;
1114         /* push the data */
1115         memcpy(rtap->data, "ABCDEFGH", 8);
1116         /* make sure to clear padding, mac80211 doesn't */
1117         memset(rtap->data + 8, 0, 4);
1118
1119         IEEE80211_SKB_RXCB(skb)->flag |= RX_FLAG_RADIOTAP_VENDOR_DATA;
1120 #endif
1121 }
1122
1123 static bool mac80211_hwsim_tx_frame_no_nl(struct ieee80211_hw *hw,
1124                                           struct sk_buff *skb,
1125                                           struct ieee80211_channel *chan)
1126 {
1127         struct mac80211_hwsim_data *data = hw->priv, *data2;
1128         bool ack = false;
1129         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1130         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1131         struct ieee80211_rx_status rx_status;
1132         u64 now;
1133
1134         memset(&rx_status, 0, sizeof(rx_status));
1135         rx_status.flag |= RX_FLAG_MACTIME_START;
1136         rx_status.freq = chan->center_freq;
1137         rx_status.band = chan->band;
1138         if (info->control.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) {
1139                 rx_status.rate_idx =
1140                         ieee80211_rate_get_vht_mcs(&info->control.rates[0]);
1141                 rx_status.vht_nss =
1142                         ieee80211_rate_get_vht_nss(&info->control.rates[0]);
1143                 rx_status.flag |= RX_FLAG_VHT;
1144         } else {
1145                 rx_status.rate_idx = info->control.rates[0].idx;
1146                 if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS)
1147                         rx_status.flag |= RX_FLAG_HT;
1148         }
1149         if (info->control.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
1150                 rx_status.flag |= RX_FLAG_40MHZ;
1151         if (info->control.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
1152                 rx_status.flag |= RX_FLAG_SHORT_GI;
1153         /* TODO: simulate real signal strength (and optional packet loss) */
1154         rx_status.signal = data->power_level - 50;
1155
1156         if (data->ps != PS_DISABLED)
1157                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1158
1159         /* release the skb's source info */
1160         skb_orphan(skb);
1161         skb_dst_drop(skb);
1162         skb->mark = 0;
1163         secpath_reset(skb);
1164         nf_reset(skb);
1165
1166         /*
1167          * Get absolute mactime here so all HWs RX at the "same time", and
1168          * absolute TX time for beacon mactime so the timestamp matches.
1169          * Giving beacons a different mactime than non-beacons looks messy, but
1170          * it helps the Toffset be exact and a ~10us mactime discrepancy
1171          * probably doesn't really matter.
1172          */
1173         if (ieee80211_is_beacon(hdr->frame_control) ||
1174             ieee80211_is_probe_resp(hdr->frame_control))
1175                 now = data->abs_bcn_ts;
1176         else
1177                 now = mac80211_hwsim_get_tsf_raw();
1178
1179         /* Copy skb to all enabled radios that are on the current frequency */
1180         spin_lock(&hwsim_radio_lock);
1181         list_for_each_entry(data2, &hwsim_radios, list) {
1182                 struct sk_buff *nskb;
1183                 struct tx_iter_data tx_iter_data = {
1184                         .receive = false,
1185                         .channel = chan,
1186                 };
1187
1188                 if (data == data2)
1189                         continue;
1190
1191                 if (!data2->started || (data2->idle && !data2->tmp_chan) ||
1192                     !hwsim_ps_rx_ok(data2, skb))
1193                         continue;
1194
1195                 if (!(data->group & data2->group))
1196                         continue;
1197
1198                 if (!hwsim_chans_compat(chan, data2->tmp_chan) &&
1199                     !hwsim_chans_compat(chan, data2->channel)) {
1200                         ieee80211_iterate_active_interfaces_atomic(
1201                                 data2->hw, IEEE80211_IFACE_ITER_NORMAL,
1202                                 mac80211_hwsim_tx_iter, &tx_iter_data);
1203                         if (!tx_iter_data.receive)
1204                                 continue;
1205                 }
1206
1207                 /*
1208                  * reserve some space for our vendor and the normal
1209                  * radiotap header, since we're copying anyway
1210                  */
1211                 if (skb->len < PAGE_SIZE && paged_rx) {
1212                         struct page *page = alloc_page(GFP_ATOMIC);
1213
1214                         if (!page)
1215                                 continue;
1216
1217                         nskb = dev_alloc_skb(128);
1218                         if (!nskb) {
1219                                 __free_page(page);
1220                                 continue;
1221                         }
1222
1223                         memcpy(page_address(page), skb->data, skb->len);
1224                         skb_add_rx_frag(nskb, 0, page, 0, skb->len, skb->len);
1225                 } else {
1226                         nskb = skb_copy(skb, GFP_ATOMIC);
1227                         if (!nskb)
1228                                 continue;
1229                 }
1230
1231                 if (mac80211_hwsim_addr_match(data2, hdr->addr1))
1232                         ack = true;
1233
1234                 rx_status.mactime = now + data2->tsf_offset;
1235
1236                 memcpy(IEEE80211_SKB_RXCB(nskb), &rx_status, sizeof(rx_status));
1237
1238                 mac80211_hwsim_add_vendor_rtap(nskb);
1239
1240                 data2->rx_pkts++;
1241                 data2->rx_bytes += nskb->len;
1242                 ieee80211_rx_irqsafe(data2->hw, nskb);
1243         }
1244         spin_unlock(&hwsim_radio_lock);
1245
1246         return ack;
1247 }
1248
1249 static void mac80211_hwsim_tx(struct ieee80211_hw *hw,
1250                               struct ieee80211_tx_control *control,
1251                               struct sk_buff *skb)
1252 {
1253         struct mac80211_hwsim_data *data = hw->priv;
1254         struct ieee80211_tx_info *txi = IEEE80211_SKB_CB(skb);
1255         struct ieee80211_chanctx_conf *chanctx_conf;
1256         struct ieee80211_channel *channel;
1257         bool ack;
1258         u32 _portid;
1259
1260         if (WARN_ON(skb->len < 10)) {
1261                 /* Should not happen; just a sanity check for addr1 use */
1262                 ieee80211_free_txskb(hw, skb);
1263                 return;
1264         }
1265
1266         if (!data->use_chanctx) {
1267                 channel = data->channel;
1268         } else if (txi->hw_queue == 4) {
1269                 channel = data->tmp_chan;
1270         } else {
1271                 chanctx_conf = rcu_dereference(txi->control.vif->chanctx_conf);
1272                 if (chanctx_conf)
1273                         channel = chanctx_conf->def.chan;
1274                 else
1275                         channel = NULL;
1276         }
1277
1278         if (WARN(!channel, "TX w/o channel - queue = %d\n", txi->hw_queue)) {
1279                 ieee80211_free_txskb(hw, skb);
1280                 return;
1281         }
1282
1283         if (data->idle && !data->tmp_chan) {
1284                 wiphy_debug(hw->wiphy, "Trying to TX when idle - reject\n");
1285                 ieee80211_free_txskb(hw, skb);
1286                 return;
1287         }
1288
1289         if (txi->control.vif)
1290                 hwsim_check_magic(txi->control.vif);
1291         if (control->sta)
1292                 hwsim_check_sta_magic(control->sta);
1293
1294         if (ieee80211_hw_check(hw, SUPPORTS_RC_TABLE))
1295                 ieee80211_get_tx_rates(txi->control.vif, control->sta, skb,
1296                                        txi->control.rates,
1297                                        ARRAY_SIZE(txi->control.rates));
1298
1299         txi->rate_driver_data[0] = channel;
1300         mac80211_hwsim_monitor_rx(hw, skb, channel);
1301
1302         /* wmediumd mode check */
1303         _portid = ACCESS_ONCE(wmediumd_portid);
1304
1305         if (_portid)
1306                 return mac80211_hwsim_tx_frame_nl(hw, skb, _portid);
1307
1308         /* NO wmediumd detected, perfect medium simulation */
1309         data->tx_pkts++;
1310         data->tx_bytes += skb->len;
1311         ack = mac80211_hwsim_tx_frame_no_nl(hw, skb, channel);
1312
1313         if (ack && skb->len >= 16) {
1314                 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1315                 mac80211_hwsim_monitor_ack(channel, hdr->addr2);
1316         }
1317
1318         ieee80211_tx_info_clear_status(txi);
1319
1320         /* frame was transmitted at most favorable rate at first attempt */
1321         txi->control.rates[0].count = 1;
1322         txi->control.rates[1].idx = -1;
1323
1324         if (!(txi->flags & IEEE80211_TX_CTL_NO_ACK) && ack)
1325                 txi->flags |= IEEE80211_TX_STAT_ACK;
1326         ieee80211_tx_status_irqsafe(hw, skb);
1327 }
1328
1329
1330 static int mac80211_hwsim_start(struct ieee80211_hw *hw)
1331 {
1332         struct mac80211_hwsim_data *data = hw->priv;
1333         wiphy_debug(hw->wiphy, "%s\n", __func__);
1334         data->started = true;
1335         return 0;
1336 }
1337
1338
1339 static void mac80211_hwsim_stop(struct ieee80211_hw *hw)
1340 {
1341         struct mac80211_hwsim_data *data = hw->priv;
1342         data->started = false;
1343         tasklet_hrtimer_cancel(&data->beacon_timer);
1344         wiphy_debug(hw->wiphy, "%s\n", __func__);
1345 }
1346
1347
1348 static int mac80211_hwsim_add_interface(struct ieee80211_hw *hw,
1349                                         struct ieee80211_vif *vif)
1350 {
1351         wiphy_debug(hw->wiphy, "%s (type=%d mac_addr=%pM)\n",
1352                     __func__, ieee80211_vif_type_p2p(vif),
1353                     vif->addr);
1354         hwsim_set_magic(vif);
1355
1356         vif->cab_queue = 0;
1357         vif->hw_queue[IEEE80211_AC_VO] = 0;
1358         vif->hw_queue[IEEE80211_AC_VI] = 1;
1359         vif->hw_queue[IEEE80211_AC_BE] = 2;
1360         vif->hw_queue[IEEE80211_AC_BK] = 3;
1361
1362         return 0;
1363 }
1364
1365
1366 static int mac80211_hwsim_change_interface(struct ieee80211_hw *hw,
1367                                            struct ieee80211_vif *vif,
1368                                            enum nl80211_iftype newtype,
1369                                            bool newp2p)
1370 {
1371         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1372         wiphy_debug(hw->wiphy,
1373                     "%s (old type=%d, new type=%d, mac_addr=%pM)\n",
1374                     __func__, ieee80211_vif_type_p2p(vif),
1375                     newtype, vif->addr);
1376         hwsim_check_magic(vif);
1377
1378         /*
1379          * interface may change from non-AP to AP in
1380          * which case this needs to be set up again
1381          */
1382         vif->cab_queue = 0;
1383
1384         return 0;
1385 }
1386
1387 static void mac80211_hwsim_remove_interface(
1388         struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1389 {
1390         wiphy_debug(hw->wiphy, "%s (type=%d mac_addr=%pM)\n",
1391                     __func__, ieee80211_vif_type_p2p(vif),
1392                     vif->addr);
1393         hwsim_check_magic(vif);
1394         hwsim_clear_magic(vif);
1395 }
1396
1397 static void mac80211_hwsim_tx_frame(struct ieee80211_hw *hw,
1398                                     struct sk_buff *skb,
1399                                     struct ieee80211_channel *chan)
1400 {
1401         u32 _pid = ACCESS_ONCE(wmediumd_portid);
1402
1403         if (ieee80211_hw_check(hw, SUPPORTS_RC_TABLE)) {
1404                 struct ieee80211_tx_info *txi = IEEE80211_SKB_CB(skb);
1405                 ieee80211_get_tx_rates(txi->control.vif, NULL, skb,
1406                                        txi->control.rates,
1407                                        ARRAY_SIZE(txi->control.rates));
1408         }
1409
1410         mac80211_hwsim_monitor_rx(hw, skb, chan);
1411
1412         if (_pid)
1413                 return mac80211_hwsim_tx_frame_nl(hw, skb, _pid);
1414
1415         mac80211_hwsim_tx_frame_no_nl(hw, skb, chan);
1416         dev_kfree_skb(skb);
1417 }
1418
1419 static void mac80211_hwsim_beacon_tx(void *arg, u8 *mac,
1420                                      struct ieee80211_vif *vif)
1421 {
1422         struct mac80211_hwsim_data *data = arg;
1423         struct ieee80211_hw *hw = data->hw;
1424         struct ieee80211_tx_info *info;
1425         struct ieee80211_rate *txrate;
1426         struct ieee80211_mgmt *mgmt;
1427         struct sk_buff *skb;
1428
1429         hwsim_check_magic(vif);
1430
1431         if (vif->type != NL80211_IFTYPE_AP &&
1432             vif->type != NL80211_IFTYPE_MESH_POINT &&
1433             vif->type != NL80211_IFTYPE_ADHOC)
1434                 return;
1435
1436         skb = ieee80211_beacon_get(hw, vif);
1437         if (skb == NULL)
1438                 return;
1439         info = IEEE80211_SKB_CB(skb);
1440         if (ieee80211_hw_check(hw, SUPPORTS_RC_TABLE))
1441                 ieee80211_get_tx_rates(vif, NULL, skb,
1442                                        info->control.rates,
1443                                        ARRAY_SIZE(info->control.rates));
1444
1445         txrate = ieee80211_get_tx_rate(hw, info);
1446
1447         mgmt = (struct ieee80211_mgmt *) skb->data;
1448         /* fake header transmission time */
1449         data->abs_bcn_ts = mac80211_hwsim_get_tsf_raw();
1450         mgmt->u.beacon.timestamp = cpu_to_le64(data->abs_bcn_ts +
1451                                                data->tsf_offset +
1452                                                24 * 8 * 10 / txrate->bitrate);
1453
1454         mac80211_hwsim_tx_frame(hw, skb,
1455                                 rcu_dereference(vif->chanctx_conf)->def.chan);
1456
1457         if (vif->csa_active && ieee80211_csa_is_complete(vif))
1458                 ieee80211_csa_finish(vif);
1459 }
1460
1461 static enum hrtimer_restart
1462 mac80211_hwsim_beacon(struct hrtimer *timer)
1463 {
1464         struct mac80211_hwsim_data *data =
1465                 container_of(timer, struct mac80211_hwsim_data,
1466                              beacon_timer.timer);
1467         struct ieee80211_hw *hw = data->hw;
1468         u64 bcn_int = data->beacon_int;
1469         ktime_t next_bcn;
1470
1471         if (!data->started)
1472                 goto out;
1473
1474         ieee80211_iterate_active_interfaces_atomic(
1475                 hw, IEEE80211_IFACE_ITER_NORMAL,
1476                 mac80211_hwsim_beacon_tx, data);
1477
1478         /* beacon at new TBTT + beacon interval */
1479         if (data->bcn_delta) {
1480                 bcn_int -= data->bcn_delta;
1481                 data->bcn_delta = 0;
1482         }
1483
1484         next_bcn = ktime_add(hrtimer_get_expires(timer),
1485                              ns_to_ktime(bcn_int * 1000));
1486         tasklet_hrtimer_start(&data->beacon_timer, next_bcn, HRTIMER_MODE_ABS);
1487 out:
1488         return HRTIMER_NORESTART;
1489 }
1490
1491 static const char * const hwsim_chanwidths[] = {
1492         [NL80211_CHAN_WIDTH_20_NOHT] = "noht",
1493         [NL80211_CHAN_WIDTH_20] = "ht20",
1494         [NL80211_CHAN_WIDTH_40] = "ht40",
1495         [NL80211_CHAN_WIDTH_80] = "vht80",
1496         [NL80211_CHAN_WIDTH_80P80] = "vht80p80",
1497         [NL80211_CHAN_WIDTH_160] = "vht160",
1498 };
1499
1500 static int mac80211_hwsim_config(struct ieee80211_hw *hw, u32 changed)
1501 {
1502         struct mac80211_hwsim_data *data = hw->priv;
1503         struct ieee80211_conf *conf = &hw->conf;
1504         static const char *smps_modes[IEEE80211_SMPS_NUM_MODES] = {
1505                 [IEEE80211_SMPS_AUTOMATIC] = "auto",
1506                 [IEEE80211_SMPS_OFF] = "off",
1507                 [IEEE80211_SMPS_STATIC] = "static",
1508                 [IEEE80211_SMPS_DYNAMIC] = "dynamic",
1509         };
1510
1511         if (conf->chandef.chan)
1512                 wiphy_debug(hw->wiphy,
1513                             "%s (freq=%d(%d - %d)/%s idle=%d ps=%d smps=%s)\n",
1514                             __func__,
1515                             conf->chandef.chan->center_freq,
1516                             conf->chandef.center_freq1,
1517                             conf->chandef.center_freq2,
1518                             hwsim_chanwidths[conf->chandef.width],
1519                             !!(conf->flags & IEEE80211_CONF_IDLE),
1520                             !!(conf->flags & IEEE80211_CONF_PS),
1521                             smps_modes[conf->smps_mode]);
1522         else
1523                 wiphy_debug(hw->wiphy,
1524                             "%s (freq=0 idle=%d ps=%d smps=%s)\n",
1525                             __func__,
1526                             !!(conf->flags & IEEE80211_CONF_IDLE),
1527                             !!(conf->flags & IEEE80211_CONF_PS),
1528                             smps_modes[conf->smps_mode]);
1529
1530         data->idle = !!(conf->flags & IEEE80211_CONF_IDLE);
1531
1532         data->channel = conf->chandef.chan;
1533
1534         WARN_ON(data->channel && data->use_chanctx);
1535
1536         data->power_level = conf->power_level;
1537         if (!data->started || !data->beacon_int)
1538                 tasklet_hrtimer_cancel(&data->beacon_timer);
1539         else if (!hrtimer_is_queued(&data->beacon_timer.timer)) {
1540                 u64 tsf = mac80211_hwsim_get_tsf(hw, NULL);
1541                 u32 bcn_int = data->beacon_int;
1542                 u64 until_tbtt = bcn_int - do_div(tsf, bcn_int);
1543
1544                 tasklet_hrtimer_start(&data->beacon_timer,
1545                                       ns_to_ktime(until_tbtt * 1000),
1546                                       HRTIMER_MODE_REL);
1547         }
1548
1549         return 0;
1550 }
1551
1552
1553 static void mac80211_hwsim_configure_filter(struct ieee80211_hw *hw,
1554                                             unsigned int changed_flags,
1555                                             unsigned int *total_flags,u64 multicast)
1556 {
1557         struct mac80211_hwsim_data *data = hw->priv;
1558
1559         wiphy_debug(hw->wiphy, "%s\n", __func__);
1560
1561         data->rx_filter = 0;
1562         if (*total_flags & FIF_ALLMULTI)
1563                 data->rx_filter |= FIF_ALLMULTI;
1564
1565         *total_flags = data->rx_filter;
1566 }
1567
1568 static void mac80211_hwsim_bcn_en_iter(void *data, u8 *mac,
1569                                        struct ieee80211_vif *vif)
1570 {
1571         unsigned int *count = data;
1572         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
1573
1574         if (vp->bcn_en)
1575                 (*count)++;
1576 }
1577
1578 static void mac80211_hwsim_bss_info_changed(struct ieee80211_hw *hw,
1579                                             struct ieee80211_vif *vif,
1580                                             struct ieee80211_bss_conf *info,
1581                                             u32 changed)
1582 {
1583         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
1584         struct mac80211_hwsim_data *data = hw->priv;
1585
1586         hwsim_check_magic(vif);
1587
1588         wiphy_debug(hw->wiphy, "%s(changed=0x%x vif->addr=%pM)\n",
1589                     __func__, changed, vif->addr);
1590
1591         if (changed & BSS_CHANGED_BSSID) {
1592                 wiphy_debug(hw->wiphy, "%s: BSSID changed: %pM\n",
1593                             __func__, info->bssid);
1594                 memcpy(vp->bssid, info->bssid, ETH_ALEN);
1595         }
1596
1597         if (changed & BSS_CHANGED_ASSOC) {
1598                 wiphy_debug(hw->wiphy, "  ASSOC: assoc=%d aid=%d\n",
1599                             info->assoc, info->aid);
1600                 vp->assoc = info->assoc;
1601                 vp->aid = info->aid;
1602         }
1603
1604         if (changed & BSS_CHANGED_BEACON_ENABLED) {
1605                 wiphy_debug(hw->wiphy, "  BCN EN: %d (BI=%u)\n",
1606                             info->enable_beacon, info->beacon_int);
1607                 vp->bcn_en = info->enable_beacon;
1608                 if (data->started &&
1609                     !hrtimer_is_queued(&data->beacon_timer.timer) &&
1610                     info->enable_beacon) {
1611                         u64 tsf, until_tbtt;
1612                         u32 bcn_int;
1613                         data->beacon_int = info->beacon_int * 1024;
1614                         tsf = mac80211_hwsim_get_tsf(hw, vif);
1615                         bcn_int = data->beacon_int;
1616                         until_tbtt = bcn_int - do_div(tsf, bcn_int);
1617                         tasklet_hrtimer_start(&data->beacon_timer,
1618                                               ns_to_ktime(until_tbtt * 1000),
1619                                               HRTIMER_MODE_REL);
1620                 } else if (!info->enable_beacon) {
1621                         unsigned int count = 0;
1622                         ieee80211_iterate_active_interfaces_atomic(
1623                                 data->hw, IEEE80211_IFACE_ITER_NORMAL,
1624                                 mac80211_hwsim_bcn_en_iter, &count);
1625                         wiphy_debug(hw->wiphy, "  beaconing vifs remaining: %u",
1626                                     count);
1627                         if (count == 0) {
1628                                 tasklet_hrtimer_cancel(&data->beacon_timer);
1629                                 data->beacon_int = 0;
1630                         }
1631                 }
1632         }
1633
1634         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1635                 wiphy_debug(hw->wiphy, "  ERP_CTS_PROT: %d\n",
1636                             info->use_cts_prot);
1637         }
1638
1639         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1640                 wiphy_debug(hw->wiphy, "  ERP_PREAMBLE: %d\n",
1641                             info->use_short_preamble);
1642         }
1643
1644         if (changed & BSS_CHANGED_ERP_SLOT) {
1645                 wiphy_debug(hw->wiphy, "  ERP_SLOT: %d\n", info->use_short_slot);
1646         }
1647
1648         if (changed & BSS_CHANGED_HT) {
1649                 wiphy_debug(hw->wiphy, "  HT: op_mode=0x%x\n",
1650                             info->ht_operation_mode);
1651         }
1652
1653         if (changed & BSS_CHANGED_BASIC_RATES) {
1654                 wiphy_debug(hw->wiphy, "  BASIC_RATES: 0x%llx\n",
1655                             (unsigned long long) info->basic_rates);
1656         }
1657
1658         if (changed & BSS_CHANGED_TXPOWER)
1659                 wiphy_debug(hw->wiphy, "  TX Power: %d dBm\n", info->txpower);
1660 }
1661
1662 static int mac80211_hwsim_sta_add(struct ieee80211_hw *hw,
1663                                   struct ieee80211_vif *vif,
1664                                   struct ieee80211_sta *sta)
1665 {
1666         hwsim_check_magic(vif);
1667         hwsim_set_sta_magic(sta);
1668
1669         return 0;
1670 }
1671
1672 static int mac80211_hwsim_sta_remove(struct ieee80211_hw *hw,
1673                                      struct ieee80211_vif *vif,
1674                                      struct ieee80211_sta *sta)
1675 {
1676         hwsim_check_magic(vif);
1677         hwsim_clear_sta_magic(sta);
1678
1679         return 0;
1680 }
1681
1682 static void mac80211_hwsim_sta_notify(struct ieee80211_hw *hw,
1683                                       struct ieee80211_vif *vif,
1684                                       enum sta_notify_cmd cmd,
1685                                       struct ieee80211_sta *sta)
1686 {
1687         hwsim_check_magic(vif);
1688
1689         switch (cmd) {
1690         case STA_NOTIFY_SLEEP:
1691         case STA_NOTIFY_AWAKE:
1692                 /* TODO: make good use of these flags */
1693                 break;
1694         default:
1695                 WARN(1, "Invalid sta notify: %d\n", cmd);
1696                 break;
1697         }
1698 }
1699
1700 static int mac80211_hwsim_set_tim(struct ieee80211_hw *hw,
1701                                   struct ieee80211_sta *sta,
1702                                   bool set)
1703 {
1704         hwsim_check_sta_magic(sta);
1705         return 0;
1706 }
1707
1708 static int mac80211_hwsim_conf_tx(
1709         struct ieee80211_hw *hw,
1710         struct ieee80211_vif *vif, u16 queue,
1711         const struct ieee80211_tx_queue_params *params)
1712 {
1713         wiphy_debug(hw->wiphy,
1714                     "%s (queue=%d txop=%d cw_min=%d cw_max=%d aifs=%d)\n",
1715                     __func__, queue,
1716                     params->txop, params->cw_min,
1717                     params->cw_max, params->aifs);
1718         return 0;
1719 }
1720
1721 static int mac80211_hwsim_get_survey(
1722         struct ieee80211_hw *hw, int idx,
1723         struct survey_info *survey)
1724 {
1725         struct ieee80211_conf *conf = &hw->conf;
1726
1727         wiphy_debug(hw->wiphy, "%s (idx=%d)\n", __func__, idx);
1728
1729         if (idx != 0)
1730                 return -ENOENT;
1731
1732         /* Current channel */
1733         survey->channel = conf->chandef.chan;
1734
1735         /*
1736          * Magically conjured noise level --- this is only ok for simulated hardware.
1737          *
1738          * A real driver which cannot determine the real channel noise MUST NOT
1739          * report any noise, especially not a magically conjured one :-)
1740          */
1741         survey->filled = SURVEY_INFO_NOISE_DBM;
1742         survey->noise = -92;
1743
1744         return 0;
1745 }
1746
1747 #ifdef CONFIG_NL80211_TESTMODE
1748 /*
1749  * This section contains example code for using netlink
1750  * attributes with the testmode command in nl80211.
1751  */
1752
1753 /* These enums need to be kept in sync with userspace */
1754 enum hwsim_testmode_attr {
1755         __HWSIM_TM_ATTR_INVALID = 0,
1756         HWSIM_TM_ATTR_CMD       = 1,
1757         HWSIM_TM_ATTR_PS        = 2,
1758
1759         /* keep last */
1760         __HWSIM_TM_ATTR_AFTER_LAST,
1761         HWSIM_TM_ATTR_MAX       = __HWSIM_TM_ATTR_AFTER_LAST - 1
1762 };
1763
1764 enum hwsim_testmode_cmd {
1765         HWSIM_TM_CMD_SET_PS             = 0,
1766         HWSIM_TM_CMD_GET_PS             = 1,
1767         HWSIM_TM_CMD_STOP_QUEUES        = 2,
1768         HWSIM_TM_CMD_WAKE_QUEUES        = 3,
1769 };
1770
1771 static const struct nla_policy hwsim_testmode_policy[HWSIM_TM_ATTR_MAX + 1] = {
1772         [HWSIM_TM_ATTR_CMD] = { .type = NLA_U32 },
1773         [HWSIM_TM_ATTR_PS] = { .type = NLA_U32 },
1774 };
1775
1776 static int mac80211_hwsim_testmode_cmd(struct ieee80211_hw *hw,
1777                                        struct ieee80211_vif *vif,
1778                                        void *data, int len)
1779 {
1780         struct mac80211_hwsim_data *hwsim = hw->priv;
1781         struct nlattr *tb[HWSIM_TM_ATTR_MAX + 1];
1782         struct sk_buff *skb;
1783         int err, ps;
1784
1785         err = nla_parse(tb, HWSIM_TM_ATTR_MAX, data, len,
1786                         hwsim_testmode_policy);
1787         if (err)
1788                 return err;
1789
1790         if (!tb[HWSIM_TM_ATTR_CMD])
1791                 return -EINVAL;
1792
1793         switch (nla_get_u32(tb[HWSIM_TM_ATTR_CMD])) {
1794         case HWSIM_TM_CMD_SET_PS:
1795                 if (!tb[HWSIM_TM_ATTR_PS])
1796                         return -EINVAL;
1797                 ps = nla_get_u32(tb[HWSIM_TM_ATTR_PS]);
1798                 return hwsim_fops_ps_write(hwsim, ps);
1799         case HWSIM_TM_CMD_GET_PS:
1800                 skb = cfg80211_testmode_alloc_reply_skb(hw->wiphy,
1801                                                 nla_total_size(sizeof(u32)));
1802                 if (!skb)
1803                         return -ENOMEM;
1804                 if (nla_put_u32(skb, HWSIM_TM_ATTR_PS, hwsim->ps))
1805                         goto nla_put_failure;
1806                 return cfg80211_testmode_reply(skb);
1807         case HWSIM_TM_CMD_STOP_QUEUES:
1808                 ieee80211_stop_queues(hw);
1809                 return 0;
1810         case HWSIM_TM_CMD_WAKE_QUEUES:
1811                 ieee80211_wake_queues(hw);
1812                 return 0;
1813         default:
1814                 return -EOPNOTSUPP;
1815         }
1816
1817  nla_put_failure:
1818         kfree_skb(skb);
1819         return -ENOBUFS;
1820 }
1821 #endif
1822
1823 static int mac80211_hwsim_ampdu_action(struct ieee80211_hw *hw,
1824                                        struct ieee80211_vif *vif,
1825                                        struct ieee80211_ampdu_params *params)
1826 {
1827         struct ieee80211_sta *sta = params->sta;
1828         enum ieee80211_ampdu_mlme_action action = params->action;
1829         u16 tid = params->tid;
1830
1831         switch (action) {
1832         case IEEE80211_AMPDU_TX_START:
1833                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1834                 break;
1835         case IEEE80211_AMPDU_TX_STOP_CONT:
1836         case IEEE80211_AMPDU_TX_STOP_FLUSH:
1837         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
1838                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1839                 break;
1840         case IEEE80211_AMPDU_TX_OPERATIONAL:
1841                 break;
1842         case IEEE80211_AMPDU_RX_START:
1843         case IEEE80211_AMPDU_RX_STOP:
1844                 break;
1845         default:
1846                 return -EOPNOTSUPP;
1847         }
1848
1849         return 0;
1850 }
1851
1852 static void mac80211_hwsim_flush(struct ieee80211_hw *hw,
1853                                  struct ieee80211_vif *vif,
1854                                  u32 queues, bool drop)
1855 {
1856         /* Not implemented, queues only on kernel side */
1857 }
1858
1859 static void hw_scan_work(struct work_struct *work)
1860 {
1861         struct mac80211_hwsim_data *hwsim =
1862                 container_of(work, struct mac80211_hwsim_data, hw_scan.work);
1863         struct cfg80211_scan_request *req = hwsim->hw_scan_request;
1864         int dwell, i;
1865
1866         mutex_lock(&hwsim->mutex);
1867         if (hwsim->scan_chan_idx >= req->n_channels) {
1868                 wiphy_debug(hwsim->hw->wiphy, "hw scan complete\n");
1869                 ieee80211_scan_completed(hwsim->hw, false);
1870                 hwsim->hw_scan_request = NULL;
1871                 hwsim->hw_scan_vif = NULL;
1872                 hwsim->tmp_chan = NULL;
1873                 mutex_unlock(&hwsim->mutex);
1874                 return;
1875         }
1876
1877         wiphy_debug(hwsim->hw->wiphy, "hw scan %d MHz\n",
1878                     req->channels[hwsim->scan_chan_idx]->center_freq);
1879
1880         hwsim->tmp_chan = req->channels[hwsim->scan_chan_idx];
1881         if (hwsim->tmp_chan->flags & IEEE80211_CHAN_NO_IR ||
1882             !req->n_ssids) {
1883                 dwell = 120;
1884         } else {
1885                 dwell = 30;
1886                 /* send probes */
1887                 for (i = 0; i < req->n_ssids; i++) {
1888                         struct sk_buff *probe;
1889
1890                         probe = ieee80211_probereq_get(hwsim->hw,
1891                                                        hwsim->scan_addr,
1892                                                        req->ssids[i].ssid,
1893                                                        req->ssids[i].ssid_len,
1894                                                        req->ie_len);
1895                         if (!probe)
1896                                 continue;
1897
1898                         if (req->ie_len)
1899                                 memcpy(skb_put(probe, req->ie_len), req->ie,
1900                                        req->ie_len);
1901
1902                         local_bh_disable();
1903                         mac80211_hwsim_tx_frame(hwsim->hw, probe,
1904                                                 hwsim->tmp_chan);
1905                         local_bh_enable();
1906                 }
1907         }
1908         ieee80211_queue_delayed_work(hwsim->hw, &hwsim->hw_scan,
1909                                      msecs_to_jiffies(dwell));
1910         hwsim->scan_chan_idx++;
1911         mutex_unlock(&hwsim->mutex);
1912 }
1913
1914 static int mac80211_hwsim_hw_scan(struct ieee80211_hw *hw,
1915                                   struct ieee80211_vif *vif,
1916                                   struct ieee80211_scan_request *hw_req)
1917 {
1918         struct mac80211_hwsim_data *hwsim = hw->priv;
1919         struct cfg80211_scan_request *req = &hw_req->req;
1920
1921         mutex_lock(&hwsim->mutex);
1922         if (WARN_ON(hwsim->tmp_chan || hwsim->hw_scan_request)) {
1923                 mutex_unlock(&hwsim->mutex);
1924                 return -EBUSY;
1925         }
1926         hwsim->hw_scan_request = req;
1927         hwsim->hw_scan_vif = vif;
1928         hwsim->scan_chan_idx = 0;
1929         if (req->flags & NL80211_SCAN_FLAG_RANDOM_ADDR)
1930                 get_random_mask_addr(hwsim->scan_addr,
1931                                      hw_req->req.mac_addr,
1932                                      hw_req->req.mac_addr_mask);
1933         else
1934                 memcpy(hwsim->scan_addr, vif->addr, ETH_ALEN);
1935         mutex_unlock(&hwsim->mutex);
1936
1937         wiphy_debug(hw->wiphy, "hwsim hw_scan request\n");
1938
1939         ieee80211_queue_delayed_work(hwsim->hw, &hwsim->hw_scan, 0);
1940
1941         return 0;
1942 }
1943
1944 static void mac80211_hwsim_cancel_hw_scan(struct ieee80211_hw *hw,
1945                                           struct ieee80211_vif *vif)
1946 {
1947         struct mac80211_hwsim_data *hwsim = hw->priv;
1948
1949         wiphy_debug(hw->wiphy, "hwsim cancel_hw_scan\n");
1950
1951         cancel_delayed_work_sync(&hwsim->hw_scan);
1952
1953         mutex_lock(&hwsim->mutex);
1954         ieee80211_scan_completed(hwsim->hw, true);
1955         hwsim->tmp_chan = NULL;
1956         hwsim->hw_scan_request = NULL;
1957         hwsim->hw_scan_vif = NULL;
1958         mutex_unlock(&hwsim->mutex);
1959 }
1960
1961 static void mac80211_hwsim_sw_scan(struct ieee80211_hw *hw,
1962                                    struct ieee80211_vif *vif,
1963                                    const u8 *mac_addr)
1964 {
1965         struct mac80211_hwsim_data *hwsim = hw->priv;
1966
1967         mutex_lock(&hwsim->mutex);
1968
1969         if (hwsim->scanning) {
1970                 printk(KERN_DEBUG "two hwsim sw_scans detected!\n");
1971                 goto out;
1972         }
1973
1974         printk(KERN_DEBUG "hwsim sw_scan request, prepping stuff\n");
1975
1976         memcpy(hwsim->scan_addr, mac_addr, ETH_ALEN);
1977         hwsim->scanning = true;
1978
1979 out:
1980         mutex_unlock(&hwsim->mutex);
1981 }
1982
1983 static void mac80211_hwsim_sw_scan_complete(struct ieee80211_hw *hw,
1984                                             struct ieee80211_vif *vif)
1985 {
1986         struct mac80211_hwsim_data *hwsim = hw->priv;
1987
1988         mutex_lock(&hwsim->mutex);
1989
1990         printk(KERN_DEBUG "hwsim sw_scan_complete\n");
1991         hwsim->scanning = false;
1992         eth_zero_addr(hwsim->scan_addr);
1993
1994         mutex_unlock(&hwsim->mutex);
1995 }
1996
1997 static void hw_roc_done(struct work_struct *work)
1998 {
1999         struct mac80211_hwsim_data *hwsim =
2000                 container_of(work, struct mac80211_hwsim_data, roc_done.work);
2001
2002         mutex_lock(&hwsim->mutex);
2003         ieee80211_remain_on_channel_expired(hwsim->hw);
2004         hwsim->tmp_chan = NULL;
2005         mutex_unlock(&hwsim->mutex);
2006
2007         wiphy_debug(hwsim->hw->wiphy, "hwsim ROC expired\n");
2008 }
2009
2010 static int mac80211_hwsim_roc(struct ieee80211_hw *hw,
2011                               struct ieee80211_vif *vif,
2012                               struct ieee80211_channel *chan,
2013                               int duration,
2014                               enum ieee80211_roc_type type)
2015 {
2016         struct mac80211_hwsim_data *hwsim = hw->priv;
2017
2018         mutex_lock(&hwsim->mutex);
2019         if (WARN_ON(hwsim->tmp_chan || hwsim->hw_scan_request)) {
2020                 mutex_unlock(&hwsim->mutex);
2021                 return -EBUSY;
2022         }
2023
2024         hwsim->tmp_chan = chan;
2025         mutex_unlock(&hwsim->mutex);
2026
2027         wiphy_debug(hw->wiphy, "hwsim ROC (%d MHz, %d ms)\n",
2028                     chan->center_freq, duration);
2029
2030         ieee80211_ready_on_channel(hw);
2031
2032         ieee80211_queue_delayed_work(hw, &hwsim->roc_done,
2033                                      msecs_to_jiffies(duration));
2034         return 0;
2035 }
2036
2037 static int mac80211_hwsim_croc(struct ieee80211_hw *hw)
2038 {
2039         struct mac80211_hwsim_data *hwsim = hw->priv;
2040
2041         cancel_delayed_work_sync(&hwsim->roc_done);
2042
2043         mutex_lock(&hwsim->mutex);
2044         hwsim->tmp_chan = NULL;
2045         mutex_unlock(&hwsim->mutex);
2046
2047         wiphy_debug(hw->wiphy, "hwsim ROC canceled\n");
2048
2049         return 0;
2050 }
2051
2052 static int mac80211_hwsim_add_chanctx(struct ieee80211_hw *hw,
2053                                       struct ieee80211_chanctx_conf *ctx)
2054 {
2055         hwsim_set_chanctx_magic(ctx);
2056         wiphy_debug(hw->wiphy,
2057                     "add channel context control: %d MHz/width: %d/cfreqs:%d/%d MHz\n",
2058                     ctx->def.chan->center_freq, ctx->def.width,
2059                     ctx->def.center_freq1, ctx->def.center_freq2);
2060         return 0;
2061 }
2062
2063 static void mac80211_hwsim_remove_chanctx(struct ieee80211_hw *hw,
2064                                           struct ieee80211_chanctx_conf *ctx)
2065 {
2066         wiphy_debug(hw->wiphy,
2067                     "remove channel context control: %d MHz/width: %d/cfreqs:%d/%d MHz\n",
2068                     ctx->def.chan->center_freq, ctx->def.width,
2069                     ctx->def.center_freq1, ctx->def.center_freq2);
2070         hwsim_check_chanctx_magic(ctx);
2071         hwsim_clear_chanctx_magic(ctx);
2072 }
2073
2074 static void mac80211_hwsim_change_chanctx(struct ieee80211_hw *hw,
2075                                           struct ieee80211_chanctx_conf *ctx,
2076                                           u32 changed)
2077 {
2078         hwsim_check_chanctx_magic(ctx);
2079         wiphy_debug(hw->wiphy,
2080                     "change channel context control: %d MHz/width: %d/cfreqs:%d/%d MHz\n",
2081                     ctx->def.chan->center_freq, ctx->def.width,
2082                     ctx->def.center_freq1, ctx->def.center_freq2);
2083 }
2084
2085 static int mac80211_hwsim_assign_vif_chanctx(struct ieee80211_hw *hw,
2086                                              struct ieee80211_vif *vif,
2087                                              struct ieee80211_chanctx_conf *ctx)
2088 {
2089         hwsim_check_magic(vif);
2090         hwsim_check_chanctx_magic(ctx);
2091
2092         return 0;
2093 }
2094
2095 static void mac80211_hwsim_unassign_vif_chanctx(struct ieee80211_hw *hw,
2096                                                 struct ieee80211_vif *vif,
2097                                                 struct ieee80211_chanctx_conf *ctx)
2098 {
2099         hwsim_check_magic(vif);
2100         hwsim_check_chanctx_magic(ctx);
2101 }
2102
2103 static const char mac80211_hwsim_gstrings_stats[][ETH_GSTRING_LEN] = {
2104         "tx_pkts_nic",
2105         "tx_bytes_nic",
2106         "rx_pkts_nic",
2107         "rx_bytes_nic",
2108         "d_tx_dropped",
2109         "d_tx_failed",
2110         "d_ps_mode",
2111         "d_group",
2112         "d_tx_power",
2113 };
2114
2115 #define MAC80211_HWSIM_SSTATS_LEN ARRAY_SIZE(mac80211_hwsim_gstrings_stats)
2116
2117 static void mac80211_hwsim_get_et_strings(struct ieee80211_hw *hw,
2118                                           struct ieee80211_vif *vif,
2119                                           u32 sset, u8 *data)
2120 {
2121         if (sset == ETH_SS_STATS)
2122                 memcpy(data, *mac80211_hwsim_gstrings_stats,
2123                        sizeof(mac80211_hwsim_gstrings_stats));
2124 }
2125
2126 static int mac80211_hwsim_get_et_sset_count(struct ieee80211_hw *hw,
2127                                             struct ieee80211_vif *vif, int sset)
2128 {
2129         if (sset == ETH_SS_STATS)
2130                 return MAC80211_HWSIM_SSTATS_LEN;
2131         return 0;
2132 }
2133
2134 static void mac80211_hwsim_get_et_stats(struct ieee80211_hw *hw,
2135                                         struct ieee80211_vif *vif,
2136                                         struct ethtool_stats *stats, u64 *data)
2137 {
2138         struct mac80211_hwsim_data *ar = hw->priv;
2139         int i = 0;
2140
2141         data[i++] = ar->tx_pkts;
2142         data[i++] = ar->tx_bytes;
2143         data[i++] = ar->rx_pkts;
2144         data[i++] = ar->rx_bytes;
2145         data[i++] = ar->tx_dropped;
2146         data[i++] = ar->tx_failed;
2147         data[i++] = ar->ps;
2148         data[i++] = ar->group;
2149         data[i++] = ar->power_level;
2150
2151         WARN_ON(i != MAC80211_HWSIM_SSTATS_LEN);
2152 }
2153
2154 static const struct ieee80211_ops mac80211_hwsim_ops = {
2155         .tx = mac80211_hwsim_tx,
2156         .start = mac80211_hwsim_start,
2157         .stop = mac80211_hwsim_stop,
2158         .add_interface = mac80211_hwsim_add_interface,
2159         .change_interface = mac80211_hwsim_change_interface,
2160         .remove_interface = mac80211_hwsim_remove_interface,
2161         .config = mac80211_hwsim_config,
2162         .configure_filter = mac80211_hwsim_configure_filter,
2163         .bss_info_changed = mac80211_hwsim_bss_info_changed,
2164         .sta_add = mac80211_hwsim_sta_add,
2165         .sta_remove = mac80211_hwsim_sta_remove,
2166         .sta_notify = mac80211_hwsim_sta_notify,
2167         .set_tim = mac80211_hwsim_set_tim,
2168         .conf_tx = mac80211_hwsim_conf_tx,
2169         .get_survey = mac80211_hwsim_get_survey,
2170         CFG80211_TESTMODE_CMD(mac80211_hwsim_testmode_cmd)
2171         .ampdu_action = mac80211_hwsim_ampdu_action,
2172         .sw_scan_start = mac80211_hwsim_sw_scan,
2173         .sw_scan_complete = mac80211_hwsim_sw_scan_complete,
2174         .flush = mac80211_hwsim_flush,
2175         .get_tsf = mac80211_hwsim_get_tsf,
2176         .set_tsf = mac80211_hwsim_set_tsf,
2177         .get_et_sset_count = mac80211_hwsim_get_et_sset_count,
2178         .get_et_stats = mac80211_hwsim_get_et_stats,
2179         .get_et_strings = mac80211_hwsim_get_et_strings,
2180 };
2181
2182 static struct ieee80211_ops mac80211_hwsim_mchan_ops;
2183
2184 struct hwsim_new_radio_params {
2185         unsigned int channels;
2186         const char *reg_alpha2;
2187         const struct ieee80211_regdomain *regd;
2188         bool reg_strict;
2189         bool p2p_device;
2190         bool use_chanctx;
2191         bool destroy_on_close;
2192         const char *hwname;
2193         bool no_vif;
2194 };
2195
2196 static void hwsim_mcast_config_msg(struct sk_buff *mcast_skb,
2197                                    struct genl_info *info)
2198 {
2199         if (info)
2200                 genl_notify(&hwsim_genl_family, mcast_skb, info,
2201                             HWSIM_MCGRP_CONFIG, GFP_KERNEL);
2202         else
2203                 genlmsg_multicast(&hwsim_genl_family, mcast_skb, 0,
2204                                   HWSIM_MCGRP_CONFIG, GFP_KERNEL);
2205 }
2206
2207 static int append_radio_msg(struct sk_buff *skb, int id,
2208                             struct hwsim_new_radio_params *param)
2209 {
2210         int ret;
2211
2212         ret = nla_put_u32(skb, HWSIM_ATTR_RADIO_ID, id);
2213         if (ret < 0)
2214                 return ret;
2215
2216         if (param->channels) {
2217                 ret = nla_put_u32(skb, HWSIM_ATTR_CHANNELS, param->channels);
2218                 if (ret < 0)
2219                         return ret;
2220         }
2221
2222         if (param->reg_alpha2) {
2223                 ret = nla_put(skb, HWSIM_ATTR_REG_HINT_ALPHA2, 2,
2224                               param->reg_alpha2);
2225                 if (ret < 0)
2226                         return ret;
2227         }
2228
2229         if (param->regd) {
2230                 int i;
2231
2232                 for (i = 0; i < ARRAY_SIZE(hwsim_world_regdom_custom); i++) {
2233                         if (hwsim_world_regdom_custom[i] != param->regd)
2234                                 continue;
2235
2236                         ret = nla_put_u32(skb, HWSIM_ATTR_REG_CUSTOM_REG, i);
2237                         if (ret < 0)
2238                                 return ret;
2239                         break;
2240                 }
2241         }
2242
2243         if (param->reg_strict) {
2244                 ret = nla_put_flag(skb, HWSIM_ATTR_REG_STRICT_REG);
2245                 if (ret < 0)
2246                         return ret;
2247         }
2248
2249         if (param->p2p_device) {
2250                 ret = nla_put_flag(skb, HWSIM_ATTR_SUPPORT_P2P_DEVICE);
2251                 if (ret < 0)
2252                         return ret;
2253         }
2254
2255         if (param->use_chanctx) {
2256                 ret = nla_put_flag(skb, HWSIM_ATTR_USE_CHANCTX);
2257                 if (ret < 0)
2258                         return ret;
2259         }
2260
2261         if (param->hwname) {
2262                 ret = nla_put(skb, HWSIM_ATTR_RADIO_NAME,
2263                               strlen(param->hwname), param->hwname);
2264                 if (ret < 0)
2265                         return ret;
2266         }
2267
2268         return 0;
2269 }
2270
2271 static void hwsim_mcast_new_radio(int id, struct genl_info *info,
2272                                   struct hwsim_new_radio_params *param)
2273 {
2274         struct sk_buff *mcast_skb;
2275         void *data;
2276
2277         mcast_skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2278         if (!mcast_skb)
2279                 return;
2280
2281         data = genlmsg_put(mcast_skb, 0, 0, &hwsim_genl_family, 0,
2282                            HWSIM_CMD_NEW_RADIO);
2283         if (!data)
2284                 goto out_err;
2285
2286         if (append_radio_msg(mcast_skb, id, param) < 0)
2287                 goto out_err;
2288
2289         genlmsg_end(mcast_skb, data);
2290
2291         hwsim_mcast_config_msg(mcast_skb, info);
2292         return;
2293
2294 out_err:
2295         genlmsg_cancel(mcast_skb, data);
2296         nlmsg_free(mcast_skb);
2297 }
2298
2299 static int mac80211_hwsim_new_radio(struct genl_info *info,
2300                                     struct hwsim_new_radio_params *param)
2301 {
2302         int err;
2303         u8 addr[ETH_ALEN];
2304         struct mac80211_hwsim_data *data;
2305         struct ieee80211_hw *hw;
2306         enum ieee80211_band band;
2307         const struct ieee80211_ops *ops = &mac80211_hwsim_ops;
2308         int idx;
2309
2310         if (WARN_ON(param->channels > 1 && !param->use_chanctx))
2311                 return -EINVAL;
2312
2313         spin_lock_bh(&hwsim_radio_lock);
2314         idx = hwsim_radio_idx++;
2315         spin_unlock_bh(&hwsim_radio_lock);
2316
2317         if (param->use_chanctx)
2318                 ops = &mac80211_hwsim_mchan_ops;
2319         hw = ieee80211_alloc_hw_nm(sizeof(*data), ops, param->hwname);
2320         if (!hw) {
2321                 printk(KERN_DEBUG "mac80211_hwsim: ieee80211_alloc_hw failed\n");
2322                 err = -ENOMEM;
2323                 goto failed;
2324         }
2325         data = hw->priv;
2326         data->hw = hw;
2327
2328         data->dev = device_create(hwsim_class, NULL, 0, hw, "hwsim%d", idx);
2329         if (IS_ERR(data->dev)) {
2330                 printk(KERN_DEBUG
2331                        "mac80211_hwsim: device_create failed (%ld)\n",
2332                        PTR_ERR(data->dev));
2333                 err = -ENOMEM;
2334                 goto failed_drvdata;
2335         }
2336         data->dev->driver = &mac80211_hwsim_driver.driver;
2337         err = device_bind_driver(data->dev);
2338         if (err != 0) {
2339                 printk(KERN_DEBUG "mac80211_hwsim: device_bind_driver failed (%d)\n",
2340                        err);
2341                 goto failed_bind;
2342         }
2343
2344         skb_queue_head_init(&data->pending);
2345
2346         SET_IEEE80211_DEV(hw, data->dev);
2347         eth_zero_addr(addr);
2348         addr[0] = 0x02;
2349         addr[3] = idx >> 8;
2350         addr[4] = idx;
2351         memcpy(data->addresses[0].addr, addr, ETH_ALEN);
2352         memcpy(data->addresses[1].addr, addr, ETH_ALEN);
2353         data->addresses[1].addr[0] |= 0x40;
2354         hw->wiphy->n_addresses = 2;
2355         hw->wiphy->addresses = data->addresses;
2356
2357         data->channels = param->channels;
2358         data->use_chanctx = param->use_chanctx;
2359         data->idx = idx;
2360         data->destroy_on_close = param->destroy_on_close;
2361         if (info)
2362                 data->portid = info->snd_portid;
2363
2364         if (data->use_chanctx) {
2365                 hw->wiphy->max_scan_ssids = 255;
2366                 hw->wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
2367                 hw->wiphy->max_remain_on_channel_duration = 1000;
2368                 /* For channels > 1 DFS is not allowed */
2369                 hw->wiphy->n_iface_combinations = 1;
2370                 hw->wiphy->iface_combinations = &data->if_combination;
2371                 if (param->p2p_device)
2372                         data->if_combination = hwsim_if_comb_p2p_dev[0];
2373                 else
2374                         data->if_combination = hwsim_if_comb[0];
2375                 data->if_combination.num_different_channels = data->channels;
2376         } else if (param->p2p_device) {
2377                 hw->wiphy->iface_combinations = hwsim_if_comb_p2p_dev;
2378                 hw->wiphy->n_iface_combinations =
2379                         ARRAY_SIZE(hwsim_if_comb_p2p_dev);
2380         } else {
2381                 hw->wiphy->iface_combinations = hwsim_if_comb;
2382                 hw->wiphy->n_iface_combinations = ARRAY_SIZE(hwsim_if_comb);
2383         }
2384
2385         INIT_DELAYED_WORK(&data->roc_done, hw_roc_done);
2386         INIT_DELAYED_WORK(&data->hw_scan, hw_scan_work);
2387
2388         hw->queues = 5;
2389         hw->offchannel_tx_hw_queue = 4;
2390         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
2391                                      BIT(NL80211_IFTYPE_AP) |
2392                                      BIT(NL80211_IFTYPE_P2P_CLIENT) |
2393                                      BIT(NL80211_IFTYPE_P2P_GO) |
2394                                      BIT(NL80211_IFTYPE_ADHOC) |
2395                                      BIT(NL80211_IFTYPE_MESH_POINT);
2396
2397         if (param->p2p_device)
2398                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_P2P_DEVICE);
2399
2400         ieee80211_hw_set(hw, SUPPORT_FAST_XMIT);
2401         ieee80211_hw_set(hw, CHANCTX_STA_CSA);
2402         ieee80211_hw_set(hw, SUPPORTS_HT_CCK_RATES);
2403         ieee80211_hw_set(hw, QUEUE_CONTROL);
2404         ieee80211_hw_set(hw, WANT_MONITOR_VIF);
2405         ieee80211_hw_set(hw, AMPDU_AGGREGATION);
2406         ieee80211_hw_set(hw, MFP_CAPABLE);
2407         ieee80211_hw_set(hw, SIGNAL_DBM);
2408         ieee80211_hw_set(hw, TDLS_WIDER_BW);
2409         if (rctbl)
2410                 ieee80211_hw_set(hw, SUPPORTS_RC_TABLE);
2411
2412         hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS |
2413                             WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL |
2414                             WIPHY_FLAG_AP_UAPSD |
2415                             WIPHY_FLAG_HAS_CHANNEL_SWITCH;
2416         hw->wiphy->features |= NL80211_FEATURE_ACTIVE_MONITOR |
2417                                NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE |
2418                                NL80211_FEATURE_STATIC_SMPS |
2419                                NL80211_FEATURE_DYNAMIC_SMPS |
2420                                NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR;
2421
2422         /* ask mac80211 to reserve space for magic */
2423         hw->vif_data_size = sizeof(struct hwsim_vif_priv);
2424         hw->sta_data_size = sizeof(struct hwsim_sta_priv);
2425         hw->chanctx_data_size = sizeof(struct hwsim_chanctx_priv);
2426
2427         memcpy(data->channels_2ghz, hwsim_channels_2ghz,
2428                 sizeof(hwsim_channels_2ghz));
2429         memcpy(data->channels_5ghz, hwsim_channels_5ghz,
2430                 sizeof(hwsim_channels_5ghz));
2431         memcpy(data->rates, hwsim_rates, sizeof(hwsim_rates));
2432
2433         for (band = IEEE80211_BAND_2GHZ; band < IEEE80211_NUM_BANDS; band++) {
2434                 struct ieee80211_supported_band *sband = &data->bands[band];
2435                 switch (band) {
2436                 case IEEE80211_BAND_2GHZ:
2437                         sband->channels = data->channels_2ghz;
2438                         sband->n_channels = ARRAY_SIZE(hwsim_channels_2ghz);
2439                         sband->bitrates = data->rates;
2440                         sband->n_bitrates = ARRAY_SIZE(hwsim_rates);
2441                         break;
2442                 case IEEE80211_BAND_5GHZ:
2443                         sband->channels = data->channels_5ghz;
2444                         sband->n_channels = ARRAY_SIZE(hwsim_channels_5ghz);
2445                         sband->bitrates = data->rates + 4;
2446                         sband->n_bitrates = ARRAY_SIZE(hwsim_rates) - 4;
2447
2448                         sband->vht_cap.vht_supported = true;
2449                         sband->vht_cap.cap =
2450                                 IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454 |
2451                                 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ |
2452                                 IEEE80211_VHT_CAP_RXLDPC |
2453                                 IEEE80211_VHT_CAP_SHORT_GI_80 |
2454                                 IEEE80211_VHT_CAP_SHORT_GI_160 |
2455                                 IEEE80211_VHT_CAP_TXSTBC |
2456                                 IEEE80211_VHT_CAP_RXSTBC_4 |
2457                                 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
2458                         sband->vht_cap.vht_mcs.rx_mcs_map =
2459                                 cpu_to_le16(IEEE80211_VHT_MCS_SUPPORT_0_9 << 0 |
2460                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 2 |
2461                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 4 |
2462                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 6 |
2463                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 8 |
2464                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 10 |
2465                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 12 |
2466                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 14);
2467                         sband->vht_cap.vht_mcs.tx_mcs_map =
2468                                 sband->vht_cap.vht_mcs.rx_mcs_map;
2469                         break;
2470                 default:
2471                         continue;
2472                 }
2473
2474                 sband->ht_cap.ht_supported = true;
2475                 sband->ht_cap.cap = IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
2476                                     IEEE80211_HT_CAP_GRN_FLD |
2477                                     IEEE80211_HT_CAP_SGI_20 |
2478                                     IEEE80211_HT_CAP_SGI_40 |
2479                                     IEEE80211_HT_CAP_DSSSCCK40;
2480                 sband->ht_cap.ampdu_factor = 0x3;
2481                 sband->ht_cap.ampdu_density = 0x6;
2482                 memset(&sband->ht_cap.mcs, 0,
2483                        sizeof(sband->ht_cap.mcs));
2484                 sband->ht_cap.mcs.rx_mask[0] = 0xff;
2485                 sband->ht_cap.mcs.rx_mask[1] = 0xff;
2486                 sband->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
2487
2488                 hw->wiphy->bands[band] = sband;
2489         }
2490
2491         /* By default all radios belong to the first group */
2492         data->group = 1;
2493         mutex_init(&data->mutex);
2494
2495         /* Enable frame retransmissions for lossy channels */
2496         hw->max_rates = 4;
2497         hw->max_rate_tries = 11;
2498
2499         hw->wiphy->vendor_commands = mac80211_hwsim_vendor_commands;
2500         hw->wiphy->n_vendor_commands =
2501                 ARRAY_SIZE(mac80211_hwsim_vendor_commands);
2502         hw->wiphy->vendor_events = mac80211_hwsim_vendor_events;
2503         hw->wiphy->n_vendor_events = ARRAY_SIZE(mac80211_hwsim_vendor_events);
2504
2505         if (param->reg_strict)
2506                 hw->wiphy->regulatory_flags |= REGULATORY_STRICT_REG;
2507         if (param->regd) {
2508                 data->regd = param->regd;
2509                 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG;
2510                 wiphy_apply_custom_regulatory(hw->wiphy, param->regd);
2511                 /* give the regulatory workqueue a chance to run */
2512                 schedule_timeout_interruptible(1);
2513         }
2514
2515         if (param->no_vif)
2516                 ieee80211_hw_set(hw, NO_AUTO_VIF);
2517
2518         tasklet_hrtimer_init(&data->beacon_timer,
2519                              mac80211_hwsim_beacon,
2520                              CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2521
2522         err = ieee80211_register_hw(hw);
2523         if (err < 0) {
2524                 printk(KERN_DEBUG "mac80211_hwsim: ieee80211_register_hw failed (%d)\n",
2525                        err);
2526                 goto failed_hw;
2527         }
2528
2529         wiphy_debug(hw->wiphy, "hwaddr %pM registered\n", hw->wiphy->perm_addr);
2530
2531         if (param->reg_alpha2) {
2532                 data->alpha2[0] = param->reg_alpha2[0];
2533                 data->alpha2[1] = param->reg_alpha2[1];
2534                 regulatory_hint(hw->wiphy, param->reg_alpha2);
2535         }
2536
2537         data->debugfs = debugfs_create_dir("hwsim", hw->wiphy->debugfsdir);
2538         debugfs_create_file("ps", 0666, data->debugfs, data, &hwsim_fops_ps);
2539         debugfs_create_file("group", 0666, data->debugfs, data,
2540                             &hwsim_fops_group);
2541         if (!data->use_chanctx)
2542                 debugfs_create_file("dfs_simulate_radar", 0222,
2543                                     data->debugfs,
2544                                     data, &hwsim_simulate_radar);
2545
2546         spin_lock_bh(&hwsim_radio_lock);
2547         list_add_tail(&data->list, &hwsim_radios);
2548         spin_unlock_bh(&hwsim_radio_lock);
2549
2550         hwsim_mcast_new_radio(idx, info, param);
2551
2552         return idx;
2553
2554 failed_hw:
2555         device_release_driver(data->dev);
2556 failed_bind:
2557         device_unregister(data->dev);
2558 failed_drvdata:
2559         ieee80211_free_hw(hw);
2560 failed:
2561         return err;
2562 }
2563
2564 static void hwsim_mcast_del_radio(int id, const char *hwname,
2565                                   struct genl_info *info)
2566 {
2567         struct sk_buff *skb;
2568         void *data;
2569         int ret;
2570
2571         skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2572         if (!skb)
2573                 return;
2574
2575         data = genlmsg_put(skb, 0, 0, &hwsim_genl_family, 0,
2576                            HWSIM_CMD_DEL_RADIO);
2577         if (!data)
2578                 goto error;
2579
2580         ret = nla_put_u32(skb, HWSIM_ATTR_RADIO_ID, id);
2581         if (ret < 0)
2582                 goto error;
2583
2584         ret = nla_put(skb, HWSIM_ATTR_RADIO_NAME, strlen(hwname),
2585                       hwname);
2586         if (ret < 0)
2587                 goto error;
2588
2589         genlmsg_end(skb, data);
2590
2591         hwsim_mcast_config_msg(skb, info);
2592
2593         return;
2594
2595 error:
2596         nlmsg_free(skb);
2597 }
2598
2599 static void mac80211_hwsim_del_radio(struct mac80211_hwsim_data *data,
2600                                      const char *hwname,
2601                                      struct genl_info *info)
2602 {
2603         hwsim_mcast_del_radio(data->idx, hwname, info);
2604         debugfs_remove_recursive(data->debugfs);
2605         ieee80211_unregister_hw(data->hw);
2606         device_release_driver(data->dev);
2607         device_unregister(data->dev);
2608         ieee80211_free_hw(data->hw);
2609 }
2610
2611 static int mac80211_hwsim_get_radio(struct sk_buff *skb,
2612                                     struct mac80211_hwsim_data *data,
2613                                     u32 portid, u32 seq,
2614                                     struct netlink_callback *cb, int flags)
2615 {
2616         void *hdr;
2617         struct hwsim_new_radio_params param = { };
2618         int res = -EMSGSIZE;
2619
2620         hdr = genlmsg_put(skb, portid, seq, &hwsim_genl_family, flags,
2621                           HWSIM_CMD_GET_RADIO);
2622         if (!hdr)
2623                 return -EMSGSIZE;
2624
2625         if (cb)
2626                 genl_dump_check_consistent(cb, hdr, &hwsim_genl_family);
2627
2628         if (data->alpha2[0] && data->alpha2[1])
2629                 param.reg_alpha2 = data->alpha2;
2630
2631         param.reg_strict = !!(data->hw->wiphy->regulatory_flags &
2632                                         REGULATORY_STRICT_REG);
2633         param.p2p_device = !!(data->hw->wiphy->interface_modes &
2634                                         BIT(NL80211_IFTYPE_P2P_DEVICE));
2635         param.use_chanctx = data->use_chanctx;
2636         param.regd = data->regd;
2637         param.channels = data->channels;
2638         param.hwname = wiphy_name(data->hw->wiphy);
2639
2640         res = append_radio_msg(skb, data->idx, &param);
2641         if (res < 0)
2642                 goto out_err;
2643
2644         genlmsg_end(skb, hdr);
2645         return 0;
2646
2647 out_err:
2648         genlmsg_cancel(skb, hdr);
2649         return res;
2650 }
2651
2652 static void mac80211_hwsim_free(void)
2653 {
2654         struct mac80211_hwsim_data *data;
2655
2656         spin_lock_bh(&hwsim_radio_lock);
2657         while ((data = list_first_entry_or_null(&hwsim_radios,
2658                                                 struct mac80211_hwsim_data,
2659                                                 list))) {
2660                 list_del(&data->list);
2661                 spin_unlock_bh(&hwsim_radio_lock);
2662                 mac80211_hwsim_del_radio(data, wiphy_name(data->hw->wiphy),
2663                                          NULL);
2664                 spin_lock_bh(&hwsim_radio_lock);
2665         }
2666         spin_unlock_bh(&hwsim_radio_lock);
2667         class_destroy(hwsim_class);
2668 }
2669
2670 static const struct net_device_ops hwsim_netdev_ops = {
2671         .ndo_start_xmit         = hwsim_mon_xmit,
2672         .ndo_change_mtu         = eth_change_mtu,
2673         .ndo_set_mac_address    = eth_mac_addr,
2674         .ndo_validate_addr      = eth_validate_addr,
2675 };
2676
2677 static void hwsim_mon_setup(struct net_device *dev)
2678 {
2679         dev->netdev_ops = &hwsim_netdev_ops;
2680         dev->destructor = free_netdev;
2681         ether_setup(dev);
2682         dev->priv_flags |= IFF_NO_QUEUE;
2683         dev->type = ARPHRD_IEEE80211_RADIOTAP;
2684         eth_zero_addr(dev->dev_addr);
2685         dev->dev_addr[0] = 0x12;
2686 }
2687
2688 static struct mac80211_hwsim_data *get_hwsim_data_ref_from_addr(const u8 *addr)
2689 {
2690         struct mac80211_hwsim_data *data;
2691         bool _found = false;
2692
2693         spin_lock_bh(&hwsim_radio_lock);
2694         list_for_each_entry(data, &hwsim_radios, list) {
2695                 if (mac80211_hwsim_addr_match(data, addr)) {
2696                         _found = true;
2697                         break;
2698                 }
2699         }
2700         spin_unlock_bh(&hwsim_radio_lock);
2701
2702         if (!_found)
2703                 return NULL;
2704
2705         return data;
2706 }
2707
2708 static int hwsim_tx_info_frame_received_nl(struct sk_buff *skb_2,
2709                                            struct genl_info *info)
2710 {
2711
2712         struct ieee80211_hdr *hdr;
2713         struct mac80211_hwsim_data *data2;
2714         struct ieee80211_tx_info *txi;
2715         struct hwsim_tx_rate *tx_attempts;
2716         unsigned long ret_skb_ptr;
2717         struct sk_buff *skb, *tmp;
2718         const u8 *src;
2719         unsigned int hwsim_flags;
2720         int i;
2721         bool found = false;
2722
2723         if (info->snd_portid != wmediumd_portid)
2724                 return -EINVAL;
2725
2726         if (!info->attrs[HWSIM_ATTR_ADDR_TRANSMITTER] ||
2727             !info->attrs[HWSIM_ATTR_FLAGS] ||
2728             !info->attrs[HWSIM_ATTR_COOKIE] ||
2729             !info->attrs[HWSIM_ATTR_SIGNAL] ||
2730             !info->attrs[HWSIM_ATTR_TX_INFO])
2731                 goto out;
2732
2733         src = (void *)nla_data(info->attrs[HWSIM_ATTR_ADDR_TRANSMITTER]);
2734         hwsim_flags = nla_get_u32(info->attrs[HWSIM_ATTR_FLAGS]);
2735         ret_skb_ptr = nla_get_u64(info->attrs[HWSIM_ATTR_COOKIE]);
2736
2737         data2 = get_hwsim_data_ref_from_addr(src);
2738         if (!data2)
2739                 goto out;
2740
2741         /* look for the skb matching the cookie passed back from user */
2742         skb_queue_walk_safe(&data2->pending, skb, tmp) {
2743                 if ((unsigned long)skb == ret_skb_ptr) {
2744                         skb_unlink(skb, &data2->pending);
2745                         found = true;
2746                         break;
2747                 }
2748         }
2749
2750         /* not found */
2751         if (!found)
2752                 goto out;
2753
2754         /* Tx info received because the frame was broadcasted on user space,
2755          so we get all the necessary info: tx attempts and skb control buff */
2756
2757         tx_attempts = (struct hwsim_tx_rate *)nla_data(
2758                        info->attrs[HWSIM_ATTR_TX_INFO]);
2759
2760         /* now send back TX status */
2761         txi = IEEE80211_SKB_CB(skb);
2762
2763         ieee80211_tx_info_clear_status(txi);
2764
2765         for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
2766                 txi->status.rates[i].idx = tx_attempts[i].idx;
2767                 txi->status.rates[i].count = tx_attempts[i].count;
2768                 /*txi->status.rates[i].flags = 0;*/
2769         }
2770
2771         txi->status.ack_signal = nla_get_u32(info->attrs[HWSIM_ATTR_SIGNAL]);
2772
2773         if (!(hwsim_flags & HWSIM_TX_CTL_NO_ACK) &&
2774            (hwsim_flags & HWSIM_TX_STAT_ACK)) {
2775                 if (skb->len >= 16) {
2776                         hdr = (struct ieee80211_hdr *) skb->data;
2777                         mac80211_hwsim_monitor_ack(data2->channel,
2778                                                    hdr->addr2);
2779                 }
2780                 txi->flags |= IEEE80211_TX_STAT_ACK;
2781         }
2782         ieee80211_tx_status_irqsafe(data2->hw, skb);
2783         return 0;
2784 out:
2785         return -EINVAL;
2786
2787 }
2788
2789 static int hwsim_cloned_frame_received_nl(struct sk_buff *skb_2,
2790                                           struct genl_info *info)
2791 {
2792         struct mac80211_hwsim_data *data2;
2793         struct ieee80211_rx_status rx_status;
2794         const u8 *dst;
2795         int frame_data_len;
2796         void *frame_data;
2797         struct sk_buff *skb = NULL;
2798
2799         if (info->snd_portid != wmediumd_portid)
2800                 return -EINVAL;
2801
2802         if (!info->attrs[HWSIM_ATTR_ADDR_RECEIVER] ||
2803             !info->attrs[HWSIM_ATTR_FRAME] ||
2804             !info->attrs[HWSIM_ATTR_RX_RATE] ||
2805             !info->attrs[HWSIM_ATTR_SIGNAL])
2806                 goto out;
2807
2808         dst = (void *)nla_data(info->attrs[HWSIM_ATTR_ADDR_RECEIVER]);
2809         frame_data_len = nla_len(info->attrs[HWSIM_ATTR_FRAME]);
2810         frame_data = (void *)nla_data(info->attrs[HWSIM_ATTR_FRAME]);
2811
2812         /* Allocate new skb here */
2813         skb = alloc_skb(frame_data_len, GFP_KERNEL);
2814         if (skb == NULL)
2815                 goto err;
2816
2817         if (frame_data_len > IEEE80211_MAX_DATA_LEN)
2818                 goto err;
2819
2820         /* Copy the data */
2821         memcpy(skb_put(skb, frame_data_len), frame_data, frame_data_len);
2822
2823         data2 = get_hwsim_data_ref_from_addr(dst);
2824         if (!data2)
2825                 goto out;
2826
2827         /* check if radio is configured properly */
2828
2829         if (data2->idle || !data2->started)
2830                 goto out;
2831
2832         /* A frame is received from user space */
2833         memset(&rx_status, 0, sizeof(rx_status));
2834         /* TODO: Check ATTR_FREQ if it exists, and maybe throw away off-channel
2835          * packets?
2836          */
2837         rx_status.freq = data2->channel->center_freq;
2838         rx_status.band = data2->channel->band;
2839         rx_status.rate_idx = nla_get_u32(info->attrs[HWSIM_ATTR_RX_RATE]);
2840         rx_status.signal = nla_get_u32(info->attrs[HWSIM_ATTR_SIGNAL]);
2841
2842         memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
2843         data2->rx_pkts++;
2844         data2->rx_bytes += skb->len;
2845         ieee80211_rx_irqsafe(data2->hw, skb);
2846
2847         return 0;
2848 err:
2849         printk(KERN_DEBUG "mac80211_hwsim: error occurred in %s\n", __func__);
2850 out:
2851         dev_kfree_skb(skb);
2852         return -EINVAL;
2853 }
2854
2855 static int hwsim_register_received_nl(struct sk_buff *skb_2,
2856                                       struct genl_info *info)
2857 {
2858         struct mac80211_hwsim_data *data;
2859         int chans = 1;
2860
2861         spin_lock_bh(&hwsim_radio_lock);
2862         list_for_each_entry(data, &hwsim_radios, list)
2863                 chans = max(chans, data->channels);
2864         spin_unlock_bh(&hwsim_radio_lock);
2865
2866         /* In the future we should revise the userspace API and allow it
2867          * to set a flag that it does support multi-channel, then we can
2868          * let this pass conditionally on the flag.
2869          * For current userspace, prohibit it since it won't work right.
2870          */
2871         if (chans > 1)
2872                 return -EOPNOTSUPP;
2873
2874         if (wmediumd_portid)
2875                 return -EBUSY;
2876
2877         wmediumd_portid = info->snd_portid;
2878
2879         printk(KERN_DEBUG "mac80211_hwsim: received a REGISTER, "
2880                "switching to wmediumd mode with pid %d\n", info->snd_portid);
2881
2882         return 0;
2883 }
2884
2885 static int hwsim_new_radio_nl(struct sk_buff *msg, struct genl_info *info)
2886 {
2887         struct hwsim_new_radio_params param = { 0 };
2888         const char *hwname = NULL;
2889         int ret;
2890
2891         param.reg_strict = info->attrs[HWSIM_ATTR_REG_STRICT_REG];
2892         param.p2p_device = info->attrs[HWSIM_ATTR_SUPPORT_P2P_DEVICE];
2893         param.channels = channels;
2894         param.destroy_on_close =
2895                 info->attrs[HWSIM_ATTR_DESTROY_RADIO_ON_CLOSE];
2896
2897         if (info->attrs[HWSIM_ATTR_CHANNELS])
2898                 param.channels = nla_get_u32(info->attrs[HWSIM_ATTR_CHANNELS]);
2899
2900         if (info->attrs[HWSIM_ATTR_NO_VIF])
2901                 param.no_vif = true;
2902
2903         if (info->attrs[HWSIM_ATTR_RADIO_NAME]) {
2904                 hwname = kstrndup((char *)nla_data(info->attrs[HWSIM_ATTR_RADIO_NAME]),
2905                                   nla_len(info->attrs[HWSIM_ATTR_RADIO_NAME]),
2906                                   GFP_KERNEL);
2907                 if (!hwname)
2908                         return -ENOMEM;
2909                 param.hwname = hwname;
2910         }
2911
2912         if (info->attrs[HWSIM_ATTR_USE_CHANCTX])
2913                 param.use_chanctx = true;
2914         else
2915                 param.use_chanctx = (param.channels > 1);
2916
2917         if (info->attrs[HWSIM_ATTR_REG_HINT_ALPHA2])
2918                 param.reg_alpha2 =
2919                         nla_data(info->attrs[HWSIM_ATTR_REG_HINT_ALPHA2]);
2920
2921         if (info->attrs[HWSIM_ATTR_REG_CUSTOM_REG]) {
2922                 u32 idx = nla_get_u32(info->attrs[HWSIM_ATTR_REG_CUSTOM_REG]);
2923
2924                 if (idx >= ARRAY_SIZE(hwsim_world_regdom_custom)) {
2925                         kfree(hwname);
2926                         return -EINVAL;
2927                 }
2928                 param.regd = hwsim_world_regdom_custom[idx];
2929         }
2930
2931         ret = mac80211_hwsim_new_radio(info, &param);
2932         kfree(hwname);
2933         return ret;
2934 }
2935
2936 static int hwsim_del_radio_nl(struct sk_buff *msg, struct genl_info *info)
2937 {
2938         struct mac80211_hwsim_data *data;
2939         s64 idx = -1;
2940         const char *hwname = NULL;
2941
2942         if (info->attrs[HWSIM_ATTR_RADIO_ID]) {
2943                 idx = nla_get_u32(info->attrs[HWSIM_ATTR_RADIO_ID]);
2944         } else if (info->attrs[HWSIM_ATTR_RADIO_NAME]) {
2945                 hwname = kstrndup((char *)nla_data(info->attrs[HWSIM_ATTR_RADIO_NAME]),
2946                                   nla_len(info->attrs[HWSIM_ATTR_RADIO_NAME]),
2947                                   GFP_KERNEL);
2948                 if (!hwname)
2949                         return -ENOMEM;
2950         } else
2951                 return -EINVAL;
2952
2953         spin_lock_bh(&hwsim_radio_lock);
2954         list_for_each_entry(data, &hwsim_radios, list) {
2955                 if (idx >= 0) {
2956                         if (data->idx != idx)
2957                                 continue;
2958                 } else {
2959                         if (!hwname ||
2960                             strcmp(hwname, wiphy_name(data->hw->wiphy)))
2961                                 continue;
2962                 }
2963
2964                 list_del(&data->list);
2965                 spin_unlock_bh(&hwsim_radio_lock);
2966                 mac80211_hwsim_del_radio(data, wiphy_name(data->hw->wiphy),
2967                                          info);
2968                 kfree(hwname);
2969                 return 0;
2970         }
2971         spin_unlock_bh(&hwsim_radio_lock);
2972
2973         kfree(hwname);
2974         return -ENODEV;
2975 }
2976
2977 static int hwsim_get_radio_nl(struct sk_buff *msg, struct genl_info *info)
2978 {
2979         struct mac80211_hwsim_data *data;
2980         struct sk_buff *skb;
2981         int idx, res = -ENODEV;
2982
2983         if (!info->attrs[HWSIM_ATTR_RADIO_ID])
2984                 return -EINVAL;
2985         idx = nla_get_u32(info->attrs[HWSIM_ATTR_RADIO_ID]);
2986
2987         spin_lock_bh(&hwsim_radio_lock);
2988         list_for_each_entry(data, &hwsim_radios, list) {
2989                 if (data->idx != idx)
2990                         continue;
2991
2992                 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2993                 if (!skb) {
2994                         res = -ENOMEM;
2995                         goto out_err;
2996                 }
2997
2998                 res = mac80211_hwsim_get_radio(skb, data, info->snd_portid,
2999                                                info->snd_seq, NULL, 0);
3000                 if (res < 0) {
3001                         nlmsg_free(skb);
3002                         goto out_err;
3003                 }
3004
3005                 res = genlmsg_reply(skb, info);
3006                 break;
3007         }
3008
3009 out_err:
3010         spin_unlock_bh(&hwsim_radio_lock);
3011
3012         return res;
3013 }
3014
3015 static int hwsim_dump_radio_nl(struct sk_buff *skb,
3016                                struct netlink_callback *cb)
3017 {
3018         int idx = cb->args[0];
3019         struct mac80211_hwsim_data *data = NULL;
3020         int res;
3021
3022         spin_lock_bh(&hwsim_radio_lock);
3023
3024         if (idx == hwsim_radio_idx)
3025                 goto done;
3026
3027         list_for_each_entry(data, &hwsim_radios, list) {
3028                 if (data->idx < idx)
3029                         continue;
3030
3031                 res = mac80211_hwsim_get_radio(skb, data,
3032                                                NETLINK_CB(cb->skb).portid,
3033                                                cb->nlh->nlmsg_seq, cb,
3034                                                NLM_F_MULTI);
3035                 if (res < 0)
3036                         break;
3037
3038                 idx = data->idx + 1;
3039         }
3040
3041         cb->args[0] = idx;
3042
3043 done:
3044         spin_unlock_bh(&hwsim_radio_lock);
3045         return skb->len;
3046 }
3047
3048 /* Generic Netlink operations array */
3049 static const struct genl_ops hwsim_ops[] = {
3050         {
3051                 .cmd = HWSIM_CMD_REGISTER,
3052                 .policy = hwsim_genl_policy,
3053                 .doit = hwsim_register_received_nl,
3054                 .flags = GENL_ADMIN_PERM,
3055         },
3056         {
3057                 .cmd = HWSIM_CMD_FRAME,
3058                 .policy = hwsim_genl_policy,
3059                 .doit = hwsim_cloned_frame_received_nl,
3060         },
3061         {
3062                 .cmd = HWSIM_CMD_TX_INFO_FRAME,
3063                 .policy = hwsim_genl_policy,
3064                 .doit = hwsim_tx_info_frame_received_nl,
3065         },
3066         {
3067                 .cmd = HWSIM_CMD_NEW_RADIO,
3068                 .policy = hwsim_genl_policy,
3069                 .doit = hwsim_new_radio_nl,
3070                 .flags = GENL_ADMIN_PERM,
3071         },
3072         {
3073                 .cmd = HWSIM_CMD_DEL_RADIO,
3074                 .policy = hwsim_genl_policy,
3075                 .doit = hwsim_del_radio_nl,
3076                 .flags = GENL_ADMIN_PERM,
3077         },
3078         {
3079                 .cmd = HWSIM_CMD_GET_RADIO,
3080                 .policy = hwsim_genl_policy,
3081                 .doit = hwsim_get_radio_nl,
3082                 .dumpit = hwsim_dump_radio_nl,
3083         },
3084 };
3085
3086 static void destroy_radio(struct work_struct *work)
3087 {
3088         struct mac80211_hwsim_data *data =
3089                 container_of(work, struct mac80211_hwsim_data, destroy_work);
3090
3091         mac80211_hwsim_del_radio(data, wiphy_name(data->hw->wiphy), NULL);
3092 }
3093
3094 static void remove_user_radios(u32 portid)
3095 {
3096         struct mac80211_hwsim_data *entry, *tmp;
3097
3098         spin_lock_bh(&hwsim_radio_lock);
3099         list_for_each_entry_safe(entry, tmp, &hwsim_radios, list) {
3100                 if (entry->destroy_on_close && entry->portid == portid) {
3101                         list_del(&entry->list);
3102                         INIT_WORK(&entry->destroy_work, destroy_radio);
3103                         schedule_work(&entry->destroy_work);
3104                 }
3105         }
3106         spin_unlock_bh(&hwsim_radio_lock);
3107 }
3108
3109 static int mac80211_hwsim_netlink_notify(struct notifier_block *nb,
3110                                          unsigned long state,
3111                                          void *_notify)
3112 {
3113         struct netlink_notify *notify = _notify;
3114
3115         if (state != NETLINK_URELEASE)
3116                 return NOTIFY_DONE;
3117
3118         remove_user_radios(notify->portid);
3119
3120         if (notify->portid == wmediumd_portid) {
3121                 printk(KERN_INFO "mac80211_hwsim: wmediumd released netlink"
3122                        " socket, switching to perfect channel medium\n");
3123                 wmediumd_portid = 0;
3124         }
3125         return NOTIFY_DONE;
3126
3127 }
3128
3129 static struct notifier_block hwsim_netlink_notifier = {
3130         .notifier_call = mac80211_hwsim_netlink_notify,
3131 };
3132
3133 static int hwsim_init_netlink(void)
3134 {
3135         int rc;
3136
3137         printk(KERN_INFO "mac80211_hwsim: initializing netlink\n");
3138
3139         rc = genl_register_family_with_ops_groups(&hwsim_genl_family,
3140                                                   hwsim_ops,
3141                                                   hwsim_mcgrps);
3142         if (rc)
3143                 goto failure;
3144
3145         rc = netlink_register_notifier(&hwsim_netlink_notifier);
3146         if (rc) {
3147                 genl_unregister_family(&hwsim_genl_family);
3148                 goto failure;
3149         }
3150
3151         return 0;
3152
3153 failure:
3154         printk(KERN_DEBUG "mac80211_hwsim: error occurred in %s\n", __func__);
3155         return -EINVAL;
3156 }
3157
3158 static void hwsim_exit_netlink(void)
3159 {
3160         /* unregister the notifier */
3161         netlink_unregister_notifier(&hwsim_netlink_notifier);
3162         /* unregister the family */
3163         genl_unregister_family(&hwsim_genl_family);
3164 }
3165
3166 static int __init init_mac80211_hwsim(void)
3167 {
3168         int i, err;
3169
3170         if (radios < 0 || radios > 100)
3171                 return -EINVAL;
3172
3173         if (channels < 1)
3174                 return -EINVAL;
3175
3176         mac80211_hwsim_mchan_ops = mac80211_hwsim_ops;
3177         mac80211_hwsim_mchan_ops.hw_scan = mac80211_hwsim_hw_scan;
3178         mac80211_hwsim_mchan_ops.cancel_hw_scan = mac80211_hwsim_cancel_hw_scan;
3179         mac80211_hwsim_mchan_ops.sw_scan_start = NULL;
3180         mac80211_hwsim_mchan_ops.sw_scan_complete = NULL;
3181         mac80211_hwsim_mchan_ops.remain_on_channel = mac80211_hwsim_roc;
3182         mac80211_hwsim_mchan_ops.cancel_remain_on_channel = mac80211_hwsim_croc;
3183         mac80211_hwsim_mchan_ops.add_chanctx = mac80211_hwsim_add_chanctx;
3184         mac80211_hwsim_mchan_ops.remove_chanctx = mac80211_hwsim_remove_chanctx;
3185         mac80211_hwsim_mchan_ops.change_chanctx = mac80211_hwsim_change_chanctx;
3186         mac80211_hwsim_mchan_ops.assign_vif_chanctx =
3187                 mac80211_hwsim_assign_vif_chanctx;
3188         mac80211_hwsim_mchan_ops.unassign_vif_chanctx =
3189                 mac80211_hwsim_unassign_vif_chanctx;
3190
3191         spin_lock_init(&hwsim_radio_lock);
3192         INIT_LIST_HEAD(&hwsim_radios);
3193
3194         err = platform_driver_register(&mac80211_hwsim_driver);
3195         if (err)
3196                 return err;
3197
3198         err = hwsim_init_netlink();
3199         if (err)
3200                 goto out_unregister_driver;
3201
3202         hwsim_class = class_create(THIS_MODULE, "mac80211_hwsim");
3203         if (IS_ERR(hwsim_class)) {
3204                 err = PTR_ERR(hwsim_class);
3205                 goto out_exit_netlink;
3206         }
3207
3208         for (i = 0; i < radios; i++) {
3209                 struct hwsim_new_radio_params param = { 0 };
3210
3211                 param.channels = channels;
3212
3213                 switch (regtest) {
3214                 case HWSIM_REGTEST_DIFF_COUNTRY:
3215                         if (i < ARRAY_SIZE(hwsim_alpha2s))
3216                                 param.reg_alpha2 = hwsim_alpha2s[i];
3217                         break;
3218                 case HWSIM_REGTEST_DRIVER_REG_FOLLOW:
3219                         if (!i)
3220                                 param.reg_alpha2 = hwsim_alpha2s[0];
3221                         break;
3222                 case HWSIM_REGTEST_STRICT_ALL:
3223                         param.reg_strict = true;
3224                 case HWSIM_REGTEST_DRIVER_REG_ALL:
3225                         param.reg_alpha2 = hwsim_alpha2s[0];
3226                         break;
3227                 case HWSIM_REGTEST_WORLD_ROAM:
3228                         if (i == 0)
3229                                 param.regd = &hwsim_world_regdom_custom_01;
3230                         break;
3231                 case HWSIM_REGTEST_CUSTOM_WORLD:
3232                         param.regd = &hwsim_world_regdom_custom_01;
3233                         break;
3234                 case HWSIM_REGTEST_CUSTOM_WORLD_2:
3235                         if (i == 0)
3236                                 param.regd = &hwsim_world_regdom_custom_01;
3237                         else if (i == 1)
3238                                 param.regd = &hwsim_world_regdom_custom_02;
3239                         break;
3240                 case HWSIM_REGTEST_STRICT_FOLLOW:
3241                         if (i == 0) {
3242                                 param.reg_strict = true;
3243                                 param.reg_alpha2 = hwsim_alpha2s[0];
3244                         }
3245                         break;
3246                 case HWSIM_REGTEST_STRICT_AND_DRIVER_REG:
3247                         if (i == 0) {
3248                                 param.reg_strict = true;
3249                                 param.reg_alpha2 = hwsim_alpha2s[0];
3250                         } else if (i == 1) {
3251                                 param.reg_alpha2 = hwsim_alpha2s[1];
3252                         }
3253                         break;
3254                 case HWSIM_REGTEST_ALL:
3255                         switch (i) {
3256                         case 0:
3257                                 param.regd = &hwsim_world_regdom_custom_01;
3258                                 break;
3259                         case 1:
3260                                 param.regd = &hwsim_world_regdom_custom_02;
3261                                 break;
3262                         case 2:
3263                                 param.reg_alpha2 = hwsim_alpha2s[0];
3264                                 break;
3265                         case 3:
3266                                 param.reg_alpha2 = hwsim_alpha2s[1];
3267                                 break;
3268                         case 4:
3269                                 param.reg_strict = true;
3270                                 param.reg_alpha2 = hwsim_alpha2s[2];
3271                                 break;
3272                         }
3273                         break;
3274                 default:
3275                         break;
3276                 }
3277
3278                 param.p2p_device = support_p2p_device;
3279                 param.use_chanctx = channels > 1;
3280
3281                 err = mac80211_hwsim_new_radio(NULL, &param);
3282                 if (err < 0)
3283                         goto out_free_radios;
3284         }
3285
3286         hwsim_mon = alloc_netdev(0, "hwsim%d", NET_NAME_UNKNOWN,
3287                                  hwsim_mon_setup);
3288         if (hwsim_mon == NULL) {
3289                 err = -ENOMEM;
3290                 goto out_free_radios;
3291         }
3292
3293         rtnl_lock();
3294         err = dev_alloc_name(hwsim_mon, hwsim_mon->name);
3295         if (err < 0) {
3296                 rtnl_unlock();
3297                 goto out_free_radios;
3298         }
3299
3300         err = register_netdevice(hwsim_mon);
3301         if (err < 0) {
3302                 rtnl_unlock();
3303                 goto out_free_mon;
3304         }
3305         rtnl_unlock();
3306
3307         return 0;
3308
3309 out_free_mon:
3310         free_netdev(hwsim_mon);
3311 out_free_radios:
3312         mac80211_hwsim_free();
3313 out_exit_netlink:
3314         hwsim_exit_netlink();
3315 out_unregister_driver:
3316         platform_driver_unregister(&mac80211_hwsim_driver);
3317         return err;
3318 }
3319 module_init(init_mac80211_hwsim);
3320
3321 static void __exit exit_mac80211_hwsim(void)
3322 {
3323         printk(KERN_DEBUG "mac80211_hwsim: unregister radios\n");
3324
3325         hwsim_exit_netlink();
3326
3327         mac80211_hwsim_free();
3328         unregister_netdev(hwsim_mon);
3329         platform_driver_unregister(&mac80211_hwsim_driver);
3330 }
3331 module_exit(exit_mac80211_hwsim);