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 static const struct ieee80211_iface_limit hwsim_if_limits[] = {
 334         { .max = 1, .types = BIT(NL80211_IFTYPE_ADHOC) },
 335         { .max = 2048,  .types = BIT(NL80211_IFTYPE_STATION) |
 336                                  BIT(NL80211_IFTYPE_P2P_CLIENT) |
 337 #ifdef CONFIG_MAC80211_MESH
 338                                  BIT(NL80211_IFTYPE_MESH_POINT) |
 339 #endif
 340                                  BIT(NL80211_IFTYPE_AP) |
 341                                  BIT(NL80211_IFTYPE_P2P_GO) },
 342         /* must be last, see hwsim_if_comb */
 343         { .max = 1, .types = BIT(NL80211_IFTYPE_P2P_DEVICE) }
 344 };
 345
 346 static const struct ieee80211_iface_limit hwsim_if_dfs_limits[] = {
 347         { .max = 8, .types = BIT(NL80211_IFTYPE_AP) },
 348 };
 349
 350 static const struct ieee80211_iface_combination hwsim_if_comb[] = {
 351         {
 352                 .limits = hwsim_if_limits,
 353                 /* remove the last entry which is P2P_DEVICE */
 354                 .n_limits = ARRAY_SIZE(hwsim_if_limits) - 1,
 355                 .max_interfaces = 2048,
 356                 .num_different_channels = 1,
 357         },
 358         {
 359                 .limits = hwsim_if_dfs_limits,
 360                 .n_limits = ARRAY_SIZE(hwsim_if_dfs_limits),
 361                 .max_interfaces = 8,
 362                 .num_different_channels = 1,
 363                 .radar_detect_widths = BIT(NL80211_CHAN_WIDTH_20_NOHT) |
 364                                        BIT(NL80211_CHAN_WIDTH_20) |
 365                                        BIT(NL80211_CHAN_WIDTH_40) |
 366                                        BIT(NL80211_CHAN_WIDTH_80) |
 367                                        BIT(NL80211_CHAN_WIDTH_160),
 368         }
 369 };
 370
 371 static const struct ieee80211_iface_combination hwsim_if_comb_p2p_dev[] = {
 372         {
 373                 .limits = hwsim_if_limits,
 374                 .n_limits = ARRAY_SIZE(hwsim_if_limits),
 375                 .max_interfaces = 2048,
 376                 .num_different_channels = 1,
 377         },
 378         {
 379                 .limits = hwsim_if_dfs_limits,
 380                 .n_limits = ARRAY_SIZE(hwsim_if_dfs_limits),
 381                 .max_interfaces = 8,
 382                 .num_different_channels = 1,
 383                 .radar_detect_widths = BIT(NL80211_CHAN_WIDTH_20_NOHT) |
 384                                        BIT(NL80211_CHAN_WIDTH_20) |
 385                                        BIT(NL80211_CHAN_WIDTH_40) |
 386                                        BIT(NL80211_CHAN_WIDTH_80) |
 387                                        BIT(NL80211_CHAN_WIDTH_160),
 388         }
 389 };
 390
 391 static spinlock_t hwsim_radio_lock;
 392 static struct list_head hwsim_radios;
 393 static int hwsim_radio_idx;
 394
 395 static struct platform_driver mac80211_hwsim_driver = {
 396         .driver = {
 397                 .name = "mac80211_hwsim",
 398                 .owner = THIS_MODULE,
 399         },
 400 };
 401
 402 struct mac80211_hwsim_data {
 403         struct list_head list;
 404         struct ieee80211_hw *hw;
 405         struct device *dev;
 406         struct ieee80211_supported_band bands[IEEE80211_NUM_BANDS];
 407         struct ieee80211_channel channels_2ghz[ARRAY_SIZE(hwsim_channels_2ghz)];
 408         struct ieee80211_channel channels_5ghz[ARRAY_SIZE(hwsim_channels_5ghz)];
 409         struct ieee80211_rate rates[ARRAY_SIZE(hwsim_rates)];
 410         struct ieee80211_iface_combination if_combination;
 411
 412         struct mac_address addresses[2];
 413         int channels, idx;
 414         bool use_chanctx;
 415
 416         struct ieee80211_channel *tmp_chan;
 417         struct delayed_work roc_done;
 418         struct delayed_work hw_scan;
 419         struct cfg80211_scan_request *hw_scan_request;
 420         struct ieee80211_vif *hw_scan_vif;
 421         int scan_chan_idx;
 422
 423         struct ieee80211_channel *channel;
 424         u64 beacon_int  /* beacon interval in us */;
 425         unsigned int rx_filter;
 426         bool started, idle, scanning;
 427         struct mutex mutex;
 428         struct tasklet_hrtimer beacon_timer;
 429         enum ps_mode {
 430                 PS_DISABLED, PS_ENABLED, PS_AUTO_POLL, PS_MANUAL_POLL
 431         } ps;
 432         bool ps_poll_pending;
 433         struct dentry *debugfs;
 434
 435         struct sk_buff_head pending;    /* packets pending */
 436         /*
 437          * Only radios in the same group can communicate together (the
 438          * channel has to match too). Each bit represents a group. A
 439          * radio can be in more then one group.
 440          */
 441         u64 group;
 442
 443         int power_level;
 444
 445         /* difference between this hw's clock and the real clock, in usecs */
 446         s64 tsf_offset;
 447         s64 bcn_delta;
 448         /* absolute beacon transmission time. Used to cover up "tx" delay. */
 449         u64 abs_bcn_ts;
 450 };
 451
 452
 453 struct hwsim_radiotap_hdr {
 454         struct ieee80211_radiotap_header hdr;
 455         __le64 rt_tsft;
 456         u8 rt_flags;
 457         u8 rt_rate;
 458         __le16 rt_channel;
 459         __le16 rt_chbitmask;
 460 } __packed;
 461
 462 struct hwsim_radiotap_ack_hdr {
 463         struct ieee80211_radiotap_header hdr;
 464         u8 rt_flags;
 465         u8 pad;
 466         __le16 rt_channel;
 467         __le16 rt_chbitmask;
 468 } __packed;
 469
 470 /* MAC80211_HWSIM netlinf family */
 471 static struct genl_family hwsim_genl_family = {
 472         .id = GENL_ID_GENERATE,
 473         .hdrsize = 0,
 474         .name = "MAC80211_HWSIM",
 475         .version = 1,
 476         .maxattr = HWSIM_ATTR_MAX,
 477 };
 478
 479 /* MAC80211_HWSIM netlink policy */
 480
 481 static const struct nla_policy hwsim_genl_policy[HWSIM_ATTR_MAX + 1] = {
 482         [HWSIM_ATTR_ADDR_RECEIVER] = { .type = NLA_UNSPEC, .len = ETH_ALEN },
 483         [HWSIM_ATTR_ADDR_TRANSMITTER] = { .type = NLA_UNSPEC, .len = ETH_ALEN },
 484         [HWSIM_ATTR_FRAME] = { .type = NLA_BINARY,
 485                                .len = IEEE80211_MAX_DATA_LEN },
 486         [HWSIM_ATTR_FLAGS] = { .type = NLA_U32 },
 487         [HWSIM_ATTR_RX_RATE] = { .type = NLA_U32 },
 488         [HWSIM_ATTR_SIGNAL] = { .type = NLA_U32 },
 489         [HWSIM_ATTR_TX_INFO] = { .type = NLA_UNSPEC,
 490                                  .len = IEEE80211_TX_MAX_RATES *
 491                                         sizeof(struct hwsim_tx_rate)},
 492         [HWSIM_ATTR_COOKIE] = { .type = NLA_U64 },
 493         [HWSIM_ATTR_CHANNELS] = { .type = NLA_U32 },
 494         [HWSIM_ATTR_RADIO_ID] = { .type = NLA_U32 },
 495         [HWSIM_ATTR_REG_HINT_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 496         [HWSIM_ATTR_REG_CUSTOM_REG] = { .type = NLA_U32 },
 497         [HWSIM_ATTR_REG_STRICT_REG] = { .type = NLA_FLAG },
 498         [HWSIM_ATTR_SUPPORT_P2P_DEVICE] = { .type = NLA_FLAG },
 499 };
 500
 501 static void mac80211_hwsim_tx_frame(struct ieee80211_hw *hw,
 502                                     struct sk_buff *skb,
 503                                     struct ieee80211_channel *chan);
 504
 505 /* sysfs attributes */
 506 static void hwsim_send_ps_poll(void *dat, u8 *mac, struct ieee80211_vif *vif)
 507 {
 508         struct mac80211_hwsim_data *data = dat;
 509         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 510         struct sk_buff *skb;
 511         struct ieee80211_pspoll *pspoll;
 512
 513         if (!vp->assoc)
 514                 return;
 515
 516         wiphy_debug(data->hw->wiphy,
 517                     "%s: send PS-Poll to %pM for aid %d\n",
 518                     __func__, vp->bssid, vp->aid);
 519
 520         skb = dev_alloc_skb(sizeof(*pspoll));
 521         if (!skb)
 522                 return;
 523         pspoll = (void *) skb_put(skb, sizeof(*pspoll));
 524         pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
 525                                             IEEE80211_STYPE_PSPOLL |
 526                                             IEEE80211_FCTL_PM);
 527         pspoll->aid = cpu_to_le16(0xc000 | vp->aid);
 528         memcpy(pspoll->bssid, vp->bssid, ETH_ALEN);
 529         memcpy(pspoll->ta, mac, ETH_ALEN);
 530
 531         rcu_read_lock();
 532         mac80211_hwsim_tx_frame(data->hw, skb,
 533                                 rcu_dereference(vif->chanctx_conf)->def.chan);
 534         rcu_read_unlock();
 535 }
 536
 537 static void hwsim_send_nullfunc(struct mac80211_hwsim_data *data, u8 *mac,
 538                                 struct ieee80211_vif *vif, int ps)
 539 {
 540         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 541         struct sk_buff *skb;
 542         struct ieee80211_hdr *hdr;
 543
 544         if (!vp->assoc)
 545                 return;
 546
 547         wiphy_debug(data->hw->wiphy,
 548                     "%s: send data::nullfunc to %pM ps=%d\n",
 549                     __func__, vp->bssid, ps);
 550
 551         skb = dev_alloc_skb(sizeof(*hdr));
 552         if (!skb)
 553                 return;
 554         hdr = (void *) skb_put(skb, sizeof(*hdr) - ETH_ALEN);
 555         hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
 556                                          IEEE80211_STYPE_NULLFUNC |
 557                                          (ps ? IEEE80211_FCTL_PM : 0));
 558         hdr->duration_id = cpu_to_le16(0);
 559         memcpy(hdr->addr1, vp->bssid, ETH_ALEN);
 560         memcpy(hdr->addr2, mac, ETH_ALEN);
 561         memcpy(hdr->addr3, vp->bssid, ETH_ALEN);
 562
 563         rcu_read_lock();
 564         mac80211_hwsim_tx_frame(data->hw, skb,
 565                                 rcu_dereference(vif->chanctx_conf)->def.chan);
 566         rcu_read_unlock();
 567 }
 568
 569
 570 static void hwsim_send_nullfunc_ps(void *dat, u8 *mac,
 571                                    struct ieee80211_vif *vif)
 572 {
 573         struct mac80211_hwsim_data *data = dat;
 574         hwsim_send_nullfunc(data, mac, vif, 1);
 575 }
 576
 577 static void hwsim_send_nullfunc_no_ps(void *dat, u8 *mac,
 578                                       struct ieee80211_vif *vif)
 579 {
 580         struct mac80211_hwsim_data *data = dat;
 581         hwsim_send_nullfunc(data, mac, vif, 0);
 582 }
 583
 584 static int hwsim_fops_ps_read(void *dat, u64 *val)
 585 {
 586         struct mac80211_hwsim_data *data = dat;
 587         *val = data->ps;
 588         return 0;
 589 }
 590
 591 static int hwsim_fops_ps_write(void *dat, u64 val)
 592 {
 593         struct mac80211_hwsim_data *data = dat;
 594         enum ps_mode old_ps;
 595
 596         if (val != PS_DISABLED && val != PS_ENABLED && val != PS_AUTO_POLL &&
 597             val != PS_MANUAL_POLL)
 598                 return -EINVAL;
 599
 600         old_ps = data->ps;
 601         data->ps = val;
 602
 603         if (val == PS_MANUAL_POLL) {
 604                 ieee80211_iterate_active_interfaces(data->hw,
 605                                                     IEEE80211_IFACE_ITER_NORMAL,
 606                                                     hwsim_send_ps_poll, data);
 607                 data->ps_poll_pending = true;
 608         } else if (old_ps == PS_DISABLED && val != PS_DISABLED) {
 609                 ieee80211_iterate_active_interfaces(data->hw,
 610                                                     IEEE80211_IFACE_ITER_NORMAL,
 611                                                     hwsim_send_nullfunc_ps,
 612                                                     data);
 613         } else if (old_ps != PS_DISABLED && val == PS_DISABLED) {
 614                 ieee80211_iterate_active_interfaces(data->hw,
 615                                                     IEEE80211_IFACE_ITER_NORMAL,
 616                                                     hwsim_send_nullfunc_no_ps,
 617                                                     data);
 618         }
 619
 620         return 0;
 621 }
 622
 623 DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_ps, hwsim_fops_ps_read, hwsim_fops_ps_write,
 624                         "%llu\n");
 625
 626 static int hwsim_write_simulate_radar(void *dat, u64 val)
 627 {
 628         struct mac80211_hwsim_data *data = dat;
 629
 630         ieee80211_radar_detected(data->hw);
 631
 632         return 0;
 633 }
 634
 635 DEFINE_SIMPLE_ATTRIBUTE(hwsim_simulate_radar, NULL,
 636                         hwsim_write_simulate_radar, "%llu\n");
 637
 638 static int hwsim_fops_group_read(void *dat, u64 *val)
 639 {
 640         struct mac80211_hwsim_data *data = dat;
 641         *val = data->group;
 642         return 0;
 643 }
 644
 645 static int hwsim_fops_group_write(void *dat, u64 val)
 646 {
 647         struct mac80211_hwsim_data *data = dat;
 648         data->group = val;
 649         return 0;
 650 }
 651
 652 DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_group,
 653                         hwsim_fops_group_read, hwsim_fops_group_write,
 654                         "%llx\n");
 655
 656 static netdev_tx_t hwsim_mon_xmit(struct sk_buff *skb,
 657                                         struct net_device *dev)
 658 {
 659         /* TODO: allow packet injection */
 660         dev_kfree_skb(skb);
 661         return NETDEV_TX_OK;
 662 }
 663
 664 static inline u64 mac80211_hwsim_get_tsf_raw(void)
 665 {
 666         return ktime_to_us(ktime_get_real());
 667 }
 668
 669 static __le64 __mac80211_hwsim_get_tsf(struct mac80211_hwsim_data *data)
 670 {
 671         u64 now = mac80211_hwsim_get_tsf_raw();
 672         return cpu_to_le64(now + data->tsf_offset);
 673 }
 674
 675 static u64 mac80211_hwsim_get_tsf(struct ieee80211_hw *hw,
 676                                   struct ieee80211_vif *vif)
 677 {
 678         struct mac80211_hwsim_data *data = hw->priv;
 679         return le64_to_cpu(__mac80211_hwsim_get_tsf(data));
 680 }
 681
 682 static void mac80211_hwsim_set_tsf(struct ieee80211_hw *hw,
 683                 struct ieee80211_vif *vif, u64 tsf)
 684 {
 685         struct mac80211_hwsim_data *data = hw->priv;
 686         u64 now = mac80211_hwsim_get_tsf(hw, vif);
 687         u32 bcn_int = data->beacon_int;
 688         s64 delta = tsf - now;
 689
 690         data->tsf_offset += delta;
 691         /* adjust after beaconing with new timestamp at old TBTT */
 692         data->bcn_delta = do_div(delta, bcn_int);
 693 }
 694
 695 static void mac80211_hwsim_monitor_rx(struct ieee80211_hw *hw,
 696                                       struct sk_buff *tx_skb,
 697                                       struct ieee80211_channel *chan)
 698 {
 699         struct mac80211_hwsim_data *data = hw->priv;
 700         struct sk_buff *skb;
 701         struct hwsim_radiotap_hdr *hdr;
 702         u16 flags;
 703         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_skb);
 704         struct ieee80211_rate *txrate = ieee80211_get_tx_rate(hw, info);
 705
 706         if (!netif_running(hwsim_mon))
 707                 return;
 708
 709         skb = skb_copy_expand(tx_skb, sizeof(*hdr), 0, GFP_ATOMIC);
 710         if (skb == NULL)
 711                 return;
 712
 713         hdr = (struct hwsim_radiotap_hdr *) skb_push(skb, sizeof(*hdr));
 714         hdr->hdr.it_version = PKTHDR_RADIOTAP_VERSION;
 715         hdr->hdr.it_pad = 0;
 716         hdr->hdr.it_len = cpu_to_le16(sizeof(*hdr));
 717         hdr->hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
 718                                           (1 << IEEE80211_RADIOTAP_RATE) |
 719                                           (1 << IEEE80211_RADIOTAP_TSFT) |
 720                                           (1 << IEEE80211_RADIOTAP_CHANNEL));
 721         hdr->rt_tsft = __mac80211_hwsim_get_tsf(data);
 722         hdr->rt_flags = 0;
 723         hdr->rt_rate = txrate->bitrate / 5;
 724         hdr->rt_channel = cpu_to_le16(chan->center_freq);
 725         flags = IEEE80211_CHAN_2GHZ;
 726         if (txrate->flags & IEEE80211_RATE_ERP_G)
 727                 flags |= IEEE80211_CHAN_OFDM;
 728         else
 729                 flags |= IEEE80211_CHAN_CCK;
 730         hdr->rt_chbitmask = cpu_to_le16(flags);
 731
 732         skb->dev = hwsim_mon;
 733         skb_set_mac_header(skb, 0);
 734         skb->ip_summed = CHECKSUM_UNNECESSARY;
 735         skb->pkt_type = PACKET_OTHERHOST;
 736         skb->protocol = htons(ETH_P_802_2);
 737         memset(skb->cb, 0, sizeof(skb->cb));
 738         netif_rx(skb);
 739 }
 740
 741
 742 static void mac80211_hwsim_monitor_ack(struct ieee80211_channel *chan,
 743                                        const u8 *addr)
 744 {
 745         struct sk_buff *skb;
 746         struct hwsim_radiotap_ack_hdr *hdr;
 747         u16 flags;
 748         struct ieee80211_hdr *hdr11;
 749
 750         if (!netif_running(hwsim_mon))
 751                 return;
 752
 753         skb = dev_alloc_skb(100);
 754         if (skb == NULL)
 755                 return;
 756
 757         hdr = (struct hwsim_radiotap_ack_hdr *) skb_put(skb, sizeof(*hdr));
 758         hdr->hdr.it_version = PKTHDR_RADIOTAP_VERSION;
 759         hdr->hdr.it_pad = 0;
 760         hdr->hdr.it_len = cpu_to_le16(sizeof(*hdr));
 761         hdr->hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
 762                                           (1 << IEEE80211_RADIOTAP_CHANNEL));
 763         hdr->rt_flags = 0;
 764         hdr->pad = 0;
 765         hdr->rt_channel = cpu_to_le16(chan->center_freq);
 766         flags = IEEE80211_CHAN_2GHZ;
 767         hdr->rt_chbitmask = cpu_to_le16(flags);
 768
 769         hdr11 = (struct ieee80211_hdr *) skb_put(skb, 10);
 770         hdr11->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
 771                                            IEEE80211_STYPE_ACK);
 772         hdr11->duration_id = cpu_to_le16(0);
 773         memcpy(hdr11->addr1, addr, ETH_ALEN);
 774
 775         skb->dev = hwsim_mon;
 776         skb_set_mac_header(skb, 0);
 777         skb->ip_summed = CHECKSUM_UNNECESSARY;
 778         skb->pkt_type = PACKET_OTHERHOST;
 779         skb->protocol = htons(ETH_P_802_2);
 780         memset(skb->cb, 0, sizeof(skb->cb));
 781         netif_rx(skb);
 782 }
 783
 784
 785 static bool hwsim_ps_rx_ok(struct mac80211_hwsim_data *data,
 786                            struct sk_buff *skb)
 787 {
 788         switch (data->ps) {
 789         case PS_DISABLED:
 790                 return true;
 791         case PS_ENABLED:
 792                 return false;
 793         case PS_AUTO_POLL:
 794                 /* TODO: accept (some) Beacons by default and other frames only
 795                  * if pending PS-Poll has been sent */
 796                 return true;
 797         case PS_MANUAL_POLL:
 798                 /* Allow unicast frames to own address if there is a pending
 799                  * PS-Poll */
 800                 if (data->ps_poll_pending &&
 801                     memcmp(data->hw->wiphy->perm_addr, skb->data + 4,
 802                            ETH_ALEN) == 0) {
 803                         data->ps_poll_pending = false;
 804                         return true;
 805                 }
 806                 return false;
 807         }
 808
 809         return true;
 810 }
 811
 812
 813 struct mac80211_hwsim_addr_match_data {
 814         bool ret;
 815         const u8 *addr;
 816 };
 817
 818 static void mac80211_hwsim_addr_iter(void *data, u8 *mac,
 819                                      struct ieee80211_vif *vif)
 820 {
 821         struct mac80211_hwsim_addr_match_data *md = data;
 822         if (memcmp(mac, md->addr, ETH_ALEN) == 0)
 823                 md->ret = true;
 824 }
 825
 826
 827 static bool mac80211_hwsim_addr_match(struct mac80211_hwsim_data *data,
 828                                       const u8 *addr)
 829 {
 830         struct mac80211_hwsim_addr_match_data md;
 831
 832         if (memcmp(addr, data->hw->wiphy->perm_addr, ETH_ALEN) == 0)
 833                 return true;
 834
 835         md.ret = false;
 836         md.addr = addr;
 837         ieee80211_iterate_active_interfaces_atomic(data->hw,
 838                                                    IEEE80211_IFACE_ITER_NORMAL,
 839                                                    mac80211_hwsim_addr_iter,
 840                                                    &md);
 841
 842         return md.ret;
 843 }
 844
 845 static void mac80211_hwsim_tx_frame_nl(struct ieee80211_hw *hw,
 846                                        struct sk_buff *my_skb,
 847                                        int dst_portid)
 848 {
 849         struct sk_buff *skb;
 850         struct mac80211_hwsim_data *data = hw->priv;
 851         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) my_skb->data;
 852         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(my_skb);
 853         void *msg_head;
 854         unsigned int hwsim_flags = 0;
 855         int i;
 856         struct hwsim_tx_rate tx_attempts[IEEE80211_TX_MAX_RATES];
 857
 858         if (data->ps != PS_DISABLED)
 859                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 860         /* If the queue contains MAX_QUEUE skb's drop some */
 861         if (skb_queue_len(&data->pending) >= MAX_QUEUE) {
 862                 /* Droping until WARN_QUEUE level */
 863                 while (skb_queue_len(&data->pending) >= WARN_QUEUE)
 864                         skb_dequeue(&data->pending);
 865         }
 866
 867         skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_ATOMIC);
 868         if (skb == NULL)
 869                 goto nla_put_failure;
 870
 871         msg_head = genlmsg_put(skb, 0, 0, &hwsim_genl_family, 0,
 872                                HWSIM_CMD_FRAME);
 873         if (msg_head == NULL) {
 874                 printk(KERN_DEBUG "mac80211_hwsim: problem with msg_head\n");
 875                 goto nla_put_failure;
 876         }
 877
 878         if (nla_put(skb, HWSIM_ATTR_ADDR_TRANSMITTER,
 879                     ETH_ALEN, data->addresses[1].addr))
 880                 goto nla_put_failure;
 881
 882         /* We get the skb->data */
 883         if (nla_put(skb, HWSIM_ATTR_FRAME, my_skb->len, my_skb->data))
 884                 goto nla_put_failure;
 885
 886         /* We get the flags for this transmission, and we translate them to
 887            wmediumd flags  */
 888
 889         if (info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS)
 890                 hwsim_flags |= HWSIM_TX_CTL_REQ_TX_STATUS;
 891
 892         if (info->flags & IEEE80211_TX_CTL_NO_ACK)
 893                 hwsim_flags |= HWSIM_TX_CTL_NO_ACK;
 894
 895         if (nla_put_u32(skb, HWSIM_ATTR_FLAGS, hwsim_flags))
 896                 goto nla_put_failure;
 897
 898         /* We get the tx control (rate and retries) info*/
 899
 900         for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
 901                 tx_attempts[i].idx = info->status.rates[i].idx;
 902                 tx_attempts[i].count = info->status.rates[i].count;
 903         }
 904
 905         if (nla_put(skb, HWSIM_ATTR_TX_INFO,
 906                     sizeof(struct hwsim_tx_rate)*IEEE80211_TX_MAX_RATES,
 907                     tx_attempts))
 908                 goto nla_put_failure;
 909
 910         /* We create a cookie to identify this skb */
 911         if (nla_put_u64(skb, HWSIM_ATTR_COOKIE, (unsigned long) my_skb))
 912                 goto nla_put_failure;
 913
 914         genlmsg_end(skb, msg_head);
 915         genlmsg_unicast(&init_net, skb, dst_portid);
 916
 917         /* Enqueue the packet */
 918         skb_queue_tail(&data->pending, my_skb);
 919         return;
 920
 921 nla_put_failure:
 922         printk(KERN_DEBUG "mac80211_hwsim: error occurred in %s\n", __func__);
 923 }
 924
 925 static bool hwsim_chans_compat(struct ieee80211_channel *c1,
 926                                struct ieee80211_channel *c2)
 927 {
 928         if (!c1 || !c2)
 929                 return false;
 930
 931         return c1->center_freq == c2->center_freq;
 932 }
 933
 934 struct tx_iter_data {
 935         struct ieee80211_channel *channel;
 936         bool receive;
 937 };
 938
 939 static void mac80211_hwsim_tx_iter(void *_data, u8 *addr,
 940                                    struct ieee80211_vif *vif)
 941 {
 942         struct tx_iter_data *data = _data;
 943
 944         if (!vif->chanctx_conf)
 945                 return;
 946
 947         if (!hwsim_chans_compat(data->channel,
 948                                 rcu_dereference(vif->chanctx_conf)->def.chan))
 949                 return;
 950
 951         data->receive = true;
 952 }
 953
 954 static bool mac80211_hwsim_tx_frame_no_nl(struct ieee80211_hw *hw,
 955                                           struct sk_buff *skb,
 956                                           struct ieee80211_channel *chan)
 957 {
 958         struct mac80211_hwsim_data *data = hw->priv, *data2;
 959         bool ack = false;
 960         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 961         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 962         struct ieee80211_rx_status rx_status;
 963         u64 now;
 964
 965         memset(&rx_status, 0, sizeof(rx_status));
 966         rx_status.flag |= RX_FLAG_MACTIME_START;
 967         rx_status.freq = chan->center_freq;
 968         rx_status.band = chan->band;
 969         if (info->control.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) {
 970                 rx_status.rate_idx =
 971                         ieee80211_rate_get_vht_mcs(&info->control.rates[0]);
 972                 rx_status.vht_nss =
 973                         ieee80211_rate_get_vht_nss(&info->control.rates[0]);
 974                 rx_status.flag |= RX_FLAG_VHT;
 975         } else {
 976                 rx_status.rate_idx = info->control.rates[0].idx;
 977                 if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS)
 978                         rx_status.flag |= RX_FLAG_HT;
 979         }
 980         if (info->control.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
 981                 rx_status.flag |= RX_FLAG_40MHZ;
 982         if (info->control.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
 983                 rx_status.flag |= RX_FLAG_SHORT_GI;
 984         /* TODO: simulate real signal strength (and optional packet loss) */
 985         rx_status.signal = data->power_level - 50;
 986
 987         if (data->ps != PS_DISABLED)
 988                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 989
 990         /* release the skb's source info */
 991         skb_orphan(skb);
 992         skb_dst_drop(skb);
 993         skb->mark = 0;
 994         secpath_reset(skb);
 995         nf_reset(skb);
 996
 997         /*
 998          * Get absolute mactime here so all HWs RX at the "same time", and
 999          * absolute TX time for beacon mactime so the timestamp matches.
1000          * Giving beacons a different mactime than non-beacons looks messy, but
1001          * it helps the Toffset be exact and a ~10us mactime discrepancy
1002          * probably doesn't really matter.
1003          */
1004         if (ieee80211_is_beacon(hdr->frame_control) ||
1005             ieee80211_is_probe_resp(hdr->frame_control))
1006                 now = data->abs_bcn_ts;
1007         else
1008                 now = mac80211_hwsim_get_tsf_raw();
1009
1010         /* Copy skb to all enabled radios that are on the current frequency */
1011         spin_lock(&hwsim_radio_lock);
1012         list_for_each_entry(data2, &hwsim_radios, list) {
1013                 struct sk_buff *nskb;
1014                 struct tx_iter_data tx_iter_data = {
1015                         .receive = false,
1016                         .channel = chan,
1017                 };
1018
1019                 if (data == data2)
1020                         continue;
1021
1022                 if (!data2->started || (data2->idle && !data2->tmp_chan) ||
1023                     !hwsim_ps_rx_ok(data2, skb))
1024                         continue;
1025
1026                 if (!(data->group & data2->group))
1027                         continue;
1028
1029                 if (!hwsim_chans_compat(chan, data2->tmp_chan) &&
1030                     !hwsim_chans_compat(chan, data2->channel)) {
1031                         ieee80211_iterate_active_interfaces_atomic(
1032                                 data2->hw, IEEE80211_IFACE_ITER_NORMAL,
1033                                 mac80211_hwsim_tx_iter, &tx_iter_data);
1034                         if (!tx_iter_data.receive)
1035                                 continue;
1036                 }
1037
1038                 /*
1039                  * reserve some space for our vendor and the normal
1040                  * radiotap header, since we're copying anyway
1041                  */
1042                 if (skb->len < PAGE_SIZE && paged_rx) {
1043                         struct page *page = alloc_page(GFP_ATOMIC);
1044
1045                         if (!page)
1046                                 continue;
1047
1048                         nskb = dev_alloc_skb(128);
1049                         if (!nskb) {
1050                                 __free_page(page);
1051                                 continue;
1052                         }
1053
1054                         memcpy(page_address(page), skb->data, skb->len);
1055                         skb_add_rx_frag(nskb, 0, page, 0, skb->len, skb->len);
1056                 } else {
1057                         nskb = skb_copy(skb, GFP_ATOMIC);
1058                         if (!nskb)
1059                                 continue;
1060                 }
1061
1062                 if (mac80211_hwsim_addr_match(data2, hdr->addr1))
1063                         ack = true;
1064
1065                 rx_status.mactime = now + data2->tsf_offset;
1066
1067                 memcpy(IEEE80211_SKB_RXCB(nskb), &rx_status, sizeof(rx_status));
1068                 ieee80211_rx_irqsafe(data2->hw, nskb);
1069         }
1070         spin_unlock(&hwsim_radio_lock);
1071
1072         return ack;
1073 }
1074
1075 static void mac80211_hwsim_tx(struct ieee80211_hw *hw,
1076                               struct ieee80211_tx_control *control,
1077                               struct sk_buff *skb)
1078 {
1079         struct mac80211_hwsim_data *data = hw->priv;
1080         struct ieee80211_tx_info *txi = IEEE80211_SKB_CB(skb);
1081         struct ieee80211_chanctx_conf *chanctx_conf;
1082         struct ieee80211_channel *channel;
1083         bool ack;
1084         u32 _portid;
1085
1086         if (WARN_ON(skb->len < 10)) {
1087                 /* Should not happen; just a sanity check for addr1 use */
1088                 ieee80211_free_txskb(hw, skb);
1089                 return;
1090         }
1091
1092         if (!data->use_chanctx) {
1093                 channel = data->channel;
1094         } else if (txi->hw_queue == 4) {
1095                 channel = data->tmp_chan;
1096         } else {
1097                 chanctx_conf = rcu_dereference(txi->control.vif->chanctx_conf);
1098                 if (chanctx_conf)
1099                         channel = chanctx_conf->def.chan;
1100                 else
1101                         channel = NULL;
1102         }
1103
1104         if (WARN(!channel, "TX w/o channel - queue = %d\n", txi->hw_queue)) {
1105                 ieee80211_free_txskb(hw, skb);
1106                 return;
1107         }
1108
1109         if (data->idle && !data->tmp_chan) {
1110                 wiphy_debug(hw->wiphy, "Trying to TX when idle - reject\n");
1111                 ieee80211_free_txskb(hw, skb);
1112                 return;
1113         }
1114
1115         if (txi->control.vif)
1116                 hwsim_check_magic(txi->control.vif);
1117         if (control->sta)
1118                 hwsim_check_sta_magic(control->sta);
1119
1120         if (hw->flags & IEEE80211_HW_SUPPORTS_RC_TABLE)
1121                 ieee80211_get_tx_rates(txi->control.vif, control->sta, skb,
1122                                        txi->control.rates,
1123                                        ARRAY_SIZE(txi->control.rates));
1124
1125         txi->rate_driver_data[0] = channel;
1126         mac80211_hwsim_monitor_rx(hw, skb, channel);
1127
1128         /* wmediumd mode check */
1129         _portid = ACCESS_ONCE(wmediumd_portid);
1130
1131         if (_portid)
1132                 return mac80211_hwsim_tx_frame_nl(hw, skb, _portid);
1133
1134         /* NO wmediumd detected, perfect medium simulation */
1135         ack = mac80211_hwsim_tx_frame_no_nl(hw, skb, channel);
1136
1137         if (ack && skb->len >= 16) {
1138                 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1139                 mac80211_hwsim_monitor_ack(channel, hdr->addr2);
1140         }
1141
1142         ieee80211_tx_info_clear_status(txi);
1143
1144         /* frame was transmitted at most favorable rate at first attempt */
1145         txi->control.rates[0].count = 1;
1146         txi->control.rates[1].idx = -1;
1147
1148         if (!(txi->flags & IEEE80211_TX_CTL_NO_ACK) && ack)
1149                 txi->flags |= IEEE80211_TX_STAT_ACK;
1150         ieee80211_tx_status_irqsafe(hw, skb);
1151 }
1152
1153
1154 static int mac80211_hwsim_start(struct ieee80211_hw *hw)
1155 {
1156         struct mac80211_hwsim_data *data = hw->priv;
1157         wiphy_debug(hw->wiphy, "%s\n", __func__);
1158         data->started = true;
1159         return 0;
1160 }
1161
1162
1163 static void mac80211_hwsim_stop(struct ieee80211_hw *hw)
1164 {
1165         struct mac80211_hwsim_data *data = hw->priv;
1166         data->started = false;
1167         tasklet_hrtimer_cancel(&data->beacon_timer);
1168         wiphy_debug(hw->wiphy, "%s\n", __func__);
1169 }
1170
1171
1172 static int mac80211_hwsim_add_interface(struct ieee80211_hw *hw,
1173                                         struct ieee80211_vif *vif)
1174 {
1175         wiphy_debug(hw->wiphy, "%s (type=%d mac_addr=%pM)\n",
1176                     __func__, ieee80211_vif_type_p2p(vif),
1177                     vif->addr);
1178         hwsim_set_magic(vif);
1179
1180         vif->cab_queue = 0;
1181         vif->hw_queue[IEEE80211_AC_VO] = 0;
1182         vif->hw_queue[IEEE80211_AC_VI] = 1;
1183         vif->hw_queue[IEEE80211_AC_BE] = 2;
1184         vif->hw_queue[IEEE80211_AC_BK] = 3;
1185
1186         return 0;
1187 }
1188
1189
1190 static int mac80211_hwsim_change_interface(struct ieee80211_hw *hw,
1191                                            struct ieee80211_vif *vif,
1192                                            enum nl80211_iftype newtype,
1193                                            bool newp2p)
1194 {
1195         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1196         wiphy_debug(hw->wiphy,
1197                     "%s (old type=%d, new type=%d, mac_addr=%pM)\n",
1198                     __func__, ieee80211_vif_type_p2p(vif),
1199                     newtype, vif->addr);
1200         hwsim_check_magic(vif);
1201
1202         /*
1203          * interface may change from non-AP to AP in
1204          * which case this needs to be set up again
1205          */
1206         vif->cab_queue = 0;
1207
1208         return 0;
1209 }
1210
1211 static void mac80211_hwsim_remove_interface(
1212         struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1213 {
1214         wiphy_debug(hw->wiphy, "%s (type=%d mac_addr=%pM)\n",
1215                     __func__, ieee80211_vif_type_p2p(vif),
1216                     vif->addr);
1217         hwsim_check_magic(vif);
1218         hwsim_clear_magic(vif);
1219 }
1220
1221 static void mac80211_hwsim_tx_frame(struct ieee80211_hw *hw,
1222                                     struct sk_buff *skb,
1223                                     struct ieee80211_channel *chan)
1224 {
1225         u32 _pid = ACCESS_ONCE(wmediumd_portid);
1226
1227         if (hw->flags & IEEE80211_HW_SUPPORTS_RC_TABLE) {
1228                 struct ieee80211_tx_info *txi = IEEE80211_SKB_CB(skb);
1229                 ieee80211_get_tx_rates(txi->control.vif, NULL, skb,
1230                                        txi->control.rates,
1231                                        ARRAY_SIZE(txi->control.rates));
1232         }
1233
1234         mac80211_hwsim_monitor_rx(hw, skb, chan);
1235
1236         if (_pid)
1237                 return mac80211_hwsim_tx_frame_nl(hw, skb, _pid);
1238
1239         mac80211_hwsim_tx_frame_no_nl(hw, skb, chan);
1240         dev_kfree_skb(skb);
1241 }
1242
1243 static void mac80211_hwsim_beacon_tx(void *arg, u8 *mac,
1244                                      struct ieee80211_vif *vif)
1245 {
1246         struct mac80211_hwsim_data *data = arg;
1247         struct ieee80211_hw *hw = data->hw;
1248         struct ieee80211_tx_info *info;
1249         struct ieee80211_rate *txrate;
1250         struct ieee80211_mgmt *mgmt;
1251         struct sk_buff *skb;
1252
1253         hwsim_check_magic(vif);
1254
1255         if (vif->type != NL80211_IFTYPE_AP &&
1256             vif->type != NL80211_IFTYPE_MESH_POINT &&
1257             vif->type != NL80211_IFTYPE_ADHOC)
1258                 return;
1259
1260         skb = ieee80211_beacon_get(hw, vif);
1261         if (skb == NULL)
1262                 return;
1263         info = IEEE80211_SKB_CB(skb);
1264         if (hw->flags & IEEE80211_HW_SUPPORTS_RC_TABLE)
1265                 ieee80211_get_tx_rates(vif, NULL, skb,
1266                                        info->control.rates,
1267                                        ARRAY_SIZE(info->control.rates));
1268
1269         txrate = ieee80211_get_tx_rate(hw, info);
1270
1271         mgmt = (struct ieee80211_mgmt *) skb->data;
1272         /* fake header transmission time */
1273         data->abs_bcn_ts = mac80211_hwsim_get_tsf_raw();
1274         mgmt->u.beacon.timestamp = cpu_to_le64(data->abs_bcn_ts +
1275                                                data->tsf_offset +
1276                                                24 * 8 * 10 / txrate->bitrate);
1277
1278         mac80211_hwsim_tx_frame(hw, skb,
1279                                 rcu_dereference(vif->chanctx_conf)->def.chan);
1280
1281         if (vif->csa_active && ieee80211_csa_is_complete(vif))
1282                 ieee80211_csa_finish(vif);
1283 }
1284
1285 static enum hrtimer_restart
1286 mac80211_hwsim_beacon(struct hrtimer *timer)
1287 {
1288         struct mac80211_hwsim_data *data =
1289                 container_of(timer, struct mac80211_hwsim_data,
1290                              beacon_timer.timer);
1291         struct ieee80211_hw *hw = data->hw;
1292         u64 bcn_int = data->beacon_int;
1293         ktime_t next_bcn;
1294
1295         if (!data->started)
1296                 goto out;
1297
1298         ieee80211_iterate_active_interfaces_atomic(
1299                 hw, IEEE80211_IFACE_ITER_NORMAL,
1300                 mac80211_hwsim_beacon_tx, data);
1301
1302         /* beacon at new TBTT + beacon interval */
1303         if (data->bcn_delta) {
1304                 bcn_int -= data->bcn_delta;
1305                 data->bcn_delta = 0;
1306         }
1307
1308         next_bcn = ktime_add(hrtimer_get_expires(timer),
1309                              ns_to_ktime(bcn_int * 1000));
1310         tasklet_hrtimer_start(&data->beacon_timer, next_bcn, HRTIMER_MODE_ABS);
1311 out:
1312         return HRTIMER_NORESTART;
1313 }
1314
1315 static const char * const hwsim_chanwidths[] = {
1316         [NL80211_CHAN_WIDTH_20_NOHT] = "noht",
1317         [NL80211_CHAN_WIDTH_20] = "ht20",
1318         [NL80211_CHAN_WIDTH_40] = "ht40",
1319         [NL80211_CHAN_WIDTH_80] = "vht80",
1320         [NL80211_CHAN_WIDTH_80P80] = "vht80p80",
1321         [NL80211_CHAN_WIDTH_160] = "vht160",
1322 };
1323
1324 static int mac80211_hwsim_config(struct ieee80211_hw *hw, u32 changed)
1325 {
1326         struct mac80211_hwsim_data *data = hw->priv;
1327         struct ieee80211_conf *conf = &hw->conf;
1328         static const char *smps_modes[IEEE80211_SMPS_NUM_MODES] = {
1329                 [IEEE80211_SMPS_AUTOMATIC] = "auto",
1330                 [IEEE80211_SMPS_OFF] = "off",
1331                 [IEEE80211_SMPS_STATIC] = "static",
1332                 [IEEE80211_SMPS_DYNAMIC] = "dynamic",
1333         };
1334
1335         if (conf->chandef.chan)
1336                 wiphy_debug(hw->wiphy,
1337                             "%s (freq=%d(%d - %d)/%s idle=%d ps=%d smps=%s)\n",
1338                             __func__,
1339                             conf->chandef.chan->center_freq,
1340                             conf->chandef.center_freq1,
1341                             conf->chandef.center_freq2,
1342                             hwsim_chanwidths[conf->chandef.width],
1343                             !!(conf->flags & IEEE80211_CONF_IDLE),
1344                             !!(conf->flags & IEEE80211_CONF_PS),
1345                             smps_modes[conf->smps_mode]);
1346         else
1347                 wiphy_debug(hw->wiphy,
1348                             "%s (freq=0 idle=%d ps=%d smps=%s)\n",
1349                             __func__,
1350                             !!(conf->flags & IEEE80211_CONF_IDLE),
1351                             !!(conf->flags & IEEE80211_CONF_PS),
1352                             smps_modes[conf->smps_mode]);
1353
1354         data->idle = !!(conf->flags & IEEE80211_CONF_IDLE);
1355
1356         data->channel = conf->chandef.chan;
1357
1358         WARN_ON(data->channel && data->use_chanctx);
1359
1360         data->power_level = conf->power_level;
1361         if (!data->started || !data->beacon_int)
1362                 tasklet_hrtimer_cancel(&data->beacon_timer);
1363         else if (!hrtimer_is_queued(&data->beacon_timer.timer)) {
1364                 u64 tsf = mac80211_hwsim_get_tsf(hw, NULL);
1365                 u32 bcn_int = data->beacon_int;
1366                 u64 until_tbtt = bcn_int - do_div(tsf, bcn_int);
1367
1368                 tasklet_hrtimer_start(&data->beacon_timer,
1369                                       ns_to_ktime(until_tbtt * 1000),
1370                                       HRTIMER_MODE_REL);
1371         }
1372
1373         return 0;
1374 }
1375
1376
1377 static void mac80211_hwsim_configure_filter(struct ieee80211_hw *hw,
1378                                             unsigned int changed_flags,
1379                                             unsigned int *total_flags,u64 multicast)
1380 {
1381         struct mac80211_hwsim_data *data = hw->priv;
1382
1383         wiphy_debug(hw->wiphy, "%s\n", __func__);
1384
1385         data->rx_filter = 0;
1386         if (*total_flags & FIF_PROMISC_IN_BSS)
1387                 data->rx_filter |= FIF_PROMISC_IN_BSS;
1388         if (*total_flags & FIF_ALLMULTI)
1389                 data->rx_filter |= FIF_ALLMULTI;
1390
1391         *total_flags = data->rx_filter;
1392 }
1393
1394 static void mac80211_hwsim_bcn_en_iter(void *data, u8 *mac,
1395                                        struct ieee80211_vif *vif)
1396 {
1397         unsigned int *count = data;
1398         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
1399
1400         if (vp->bcn_en)
1401                 (*count)++;
1402 }
1403
1404 static void mac80211_hwsim_bss_info_changed(struct ieee80211_hw *hw,
1405                                             struct ieee80211_vif *vif,
1406                                             struct ieee80211_bss_conf *info,
1407                                             u32 changed)
1408 {
1409         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
1410         struct mac80211_hwsim_data *data = hw->priv;
1411
1412         hwsim_check_magic(vif);
1413
1414         wiphy_debug(hw->wiphy, "%s(changed=0x%x vif->addr=%pM)\n",
1415                     __func__, changed, vif->addr);
1416
1417         if (changed & BSS_CHANGED_BSSID) {
1418                 wiphy_debug(hw->wiphy, "%s: BSSID changed: %pM\n",
1419                             __func__, info->bssid);
1420                 memcpy(vp->bssid, info->bssid, ETH_ALEN);
1421         }
1422
1423         if (changed & BSS_CHANGED_ASSOC) {
1424                 wiphy_debug(hw->wiphy, "  ASSOC: assoc=%d aid=%d\n",
1425                             info->assoc, info->aid);
1426                 vp->assoc = info->assoc;
1427                 vp->aid = info->aid;
1428         }
1429
1430         if (changed & BSS_CHANGED_BEACON_INT) {
1431                 wiphy_debug(hw->wiphy, "  BCNINT: %d\n", info->beacon_int);
1432                 data->beacon_int = info->beacon_int * 1024;
1433         }
1434
1435         if (changed & BSS_CHANGED_BEACON_ENABLED) {
1436                 wiphy_debug(hw->wiphy, "  BCN EN: %d\n", info->enable_beacon);
1437                 vp->bcn_en = info->enable_beacon;
1438                 if (data->started &&
1439                     !hrtimer_is_queued(&data->beacon_timer.timer) &&
1440                     info->enable_beacon) {
1441                         u64 tsf, until_tbtt;
1442                         u32 bcn_int;
1443                         if (WARN_ON(!data->beacon_int))
1444                                 data->beacon_int = 1000 * 1024;
1445                         tsf = mac80211_hwsim_get_tsf(hw, vif);
1446                         bcn_int = data->beacon_int;
1447                         until_tbtt = bcn_int - do_div(tsf, bcn_int);
1448                         tasklet_hrtimer_start(&data->beacon_timer,
1449                                               ns_to_ktime(until_tbtt * 1000),
1450                                               HRTIMER_MODE_REL);
1451                 } else if (!info->enable_beacon) {
1452                         unsigned int count = 0;
1453                         ieee80211_iterate_active_interfaces_atomic(
1454                                 data->hw, IEEE80211_IFACE_ITER_NORMAL,
1455                                 mac80211_hwsim_bcn_en_iter, &count);
1456                         wiphy_debug(hw->wiphy, "  beaconing vifs remaining: %u",
1457                                     count);
1458                         if (count == 0)
1459                                 tasklet_hrtimer_cancel(&data->beacon_timer);
1460                 }
1461         }
1462
1463         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1464                 wiphy_debug(hw->wiphy, "  ERP_CTS_PROT: %d\n",
1465                             info->use_cts_prot);
1466         }
1467
1468         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1469                 wiphy_debug(hw->wiphy, "  ERP_PREAMBLE: %d\n",
1470                             info->use_short_preamble);
1471         }
1472
1473         if (changed & BSS_CHANGED_ERP_SLOT) {
1474                 wiphy_debug(hw->wiphy, "  ERP_SLOT: %d\n", info->use_short_slot);
1475         }
1476
1477         if (changed & BSS_CHANGED_HT) {
1478                 wiphy_debug(hw->wiphy, "  HT: op_mode=0x%x\n",
1479                             info->ht_operation_mode);
1480         }
1481
1482         if (changed & BSS_CHANGED_BASIC_RATES) {
1483                 wiphy_debug(hw->wiphy, "  BASIC_RATES: 0x%llx\n",
1484                             (unsigned long long) info->basic_rates);
1485         }
1486
1487         if (changed & BSS_CHANGED_TXPOWER)
1488                 wiphy_debug(hw->wiphy, "  TX Power: %d dBm\n", info->txpower);
1489 }
1490
1491 static int mac80211_hwsim_sta_add(struct ieee80211_hw *hw,
1492                                   struct ieee80211_vif *vif,
1493                                   struct ieee80211_sta *sta)
1494 {
1495         hwsim_check_magic(vif);
1496         hwsim_set_sta_magic(sta);
1497
1498         return 0;
1499 }
1500
1501 static int mac80211_hwsim_sta_remove(struct ieee80211_hw *hw,
1502                                      struct ieee80211_vif *vif,
1503                                      struct ieee80211_sta *sta)
1504 {
1505         hwsim_check_magic(vif);
1506         hwsim_clear_sta_magic(sta);
1507
1508         return 0;
1509 }
1510
1511 static void mac80211_hwsim_sta_notify(struct ieee80211_hw *hw,
1512                                       struct ieee80211_vif *vif,
1513                                       enum sta_notify_cmd cmd,
1514                                       struct ieee80211_sta *sta)
1515 {
1516         hwsim_check_magic(vif);
1517
1518         switch (cmd) {
1519         case STA_NOTIFY_SLEEP:
1520         case STA_NOTIFY_AWAKE:
1521                 /* TODO: make good use of these flags */
1522                 break;
1523         default:
1524                 WARN(1, "Invalid sta notify: %d\n", cmd);
1525                 break;
1526         }
1527 }
1528
1529 static int mac80211_hwsim_set_tim(struct ieee80211_hw *hw,
1530                                   struct ieee80211_sta *sta,
1531                                   bool set)
1532 {
1533         hwsim_check_sta_magic(sta);
1534         return 0;
1535 }
1536
1537 static int mac80211_hwsim_conf_tx(
1538         struct ieee80211_hw *hw,
1539         struct ieee80211_vif *vif, u16 queue,
1540         const struct ieee80211_tx_queue_params *params)
1541 {
1542         wiphy_debug(hw->wiphy,
1543                     "%s (queue=%d txop=%d cw_min=%d cw_max=%d aifs=%d)\n",
1544                     __func__, queue,
1545                     params->txop, params->cw_min,
1546                     params->cw_max, params->aifs);
1547         return 0;
1548 }
1549
1550 static int mac80211_hwsim_get_survey(
1551         struct ieee80211_hw *hw, int idx,
1552         struct survey_info *survey)
1553 {
1554         struct ieee80211_conf *conf = &hw->conf;
1555
1556         wiphy_debug(hw->wiphy, "%s (idx=%d)\n", __func__, idx);
1557
1558         if (idx != 0)
1559                 return -ENOENT;
1560
1561         /* Current channel */
1562         survey->channel = conf->chandef.chan;
1563
1564         /*
1565          * Magically conjured noise level --- this is only ok for simulated hardware.
1566          *
1567          * A real driver which cannot determine the real channel noise MUST NOT
1568          * report any noise, especially not a magically conjured one :-)
1569          */
1570         survey->filled = SURVEY_INFO_NOISE_DBM;
1571         survey->noise = -92;
1572
1573         return 0;
1574 }
1575
1576 #ifdef CONFIG_NL80211_TESTMODE
1577 /*
1578  * This section contains example code for using netlink
1579  * attributes with the testmode command in nl80211.
1580  */
1581
1582 /* These enums need to be kept in sync with userspace */
1583 enum hwsim_testmode_attr {
1584         __HWSIM_TM_ATTR_INVALID = 0,
1585         HWSIM_TM_ATTR_CMD       = 1,
1586         HWSIM_TM_ATTR_PS        = 2,
1587
1588         /* keep last */
1589         __HWSIM_TM_ATTR_AFTER_LAST,
1590         HWSIM_TM_ATTR_MAX       = __HWSIM_TM_ATTR_AFTER_LAST - 1
1591 };
1592
1593 enum hwsim_testmode_cmd {
1594         HWSIM_TM_CMD_SET_PS             = 0,
1595         HWSIM_TM_CMD_GET_PS             = 1,
1596         HWSIM_TM_CMD_STOP_QUEUES        = 2,
1597         HWSIM_TM_CMD_WAKE_QUEUES        = 3,
1598 };
1599
1600 static const struct nla_policy hwsim_testmode_policy[HWSIM_TM_ATTR_MAX + 1] = {
1601         [HWSIM_TM_ATTR_CMD] = { .type = NLA_U32 },
1602         [HWSIM_TM_ATTR_PS] = { .type = NLA_U32 },
1603 };
1604
1605 static int mac80211_hwsim_testmode_cmd(struct ieee80211_hw *hw,
1606                                        struct ieee80211_vif *vif,
1607                                        void *data, int len)
1608 {
1609         struct mac80211_hwsim_data *hwsim = hw->priv;
1610         struct nlattr *tb[HWSIM_TM_ATTR_MAX + 1];
1611         struct sk_buff *skb;
1612         int err, ps;
1613
1614         err = nla_parse(tb, HWSIM_TM_ATTR_MAX, data, len,
1615                         hwsim_testmode_policy);
1616         if (err)
1617                 return err;
1618
1619         if (!tb[HWSIM_TM_ATTR_CMD])
1620                 return -EINVAL;
1621
1622         switch (nla_get_u32(tb[HWSIM_TM_ATTR_CMD])) {
1623         case HWSIM_TM_CMD_SET_PS:
1624                 if (!tb[HWSIM_TM_ATTR_PS])
1625                         return -EINVAL;
1626                 ps = nla_get_u32(tb[HWSIM_TM_ATTR_PS]);
1627                 return hwsim_fops_ps_write(hwsim, ps);
1628         case HWSIM_TM_CMD_GET_PS:
1629                 skb = cfg80211_testmode_alloc_reply_skb(hw->wiphy,
1630                                                 nla_total_size(sizeof(u32)));
1631                 if (!skb)
1632                         return -ENOMEM;
1633                 if (nla_put_u32(skb, HWSIM_TM_ATTR_PS, hwsim->ps))
1634                         goto nla_put_failure;
1635                 return cfg80211_testmode_reply(skb);
1636         case HWSIM_TM_CMD_STOP_QUEUES:
1637                 ieee80211_stop_queues(hw);
1638                 return 0;
1639         case HWSIM_TM_CMD_WAKE_QUEUES:
1640                 ieee80211_wake_queues(hw);
1641                 return 0;
1642         default:
1643                 return -EOPNOTSUPP;
1644         }
1645
1646  nla_put_failure:
1647         kfree_skb(skb);
1648         return -ENOBUFS;
1649 }
1650 #endif
1651
1652 static int mac80211_hwsim_ampdu_action(struct ieee80211_hw *hw,
1653                                        struct ieee80211_vif *vif,
1654                                        enum ieee80211_ampdu_mlme_action action,
1655                                        struct ieee80211_sta *sta, u16 tid, u16 *ssn,
1656                                        u8 buf_size)
1657 {
1658         switch (action) {
1659         case IEEE80211_AMPDU_TX_START:
1660                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1661                 break;
1662         case IEEE80211_AMPDU_TX_STOP_CONT:
1663         case IEEE80211_AMPDU_TX_STOP_FLUSH:
1664         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
1665                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1666                 break;
1667         case IEEE80211_AMPDU_TX_OPERATIONAL:
1668                 break;
1669         case IEEE80211_AMPDU_RX_START:
1670         case IEEE80211_AMPDU_RX_STOP:
1671                 break;
1672         default:
1673                 return -EOPNOTSUPP;
1674         }
1675
1676         return 0;
1677 }
1678
1679 static void mac80211_hwsim_flush(struct ieee80211_hw *hw, u32 queues, bool drop)
1680 {
1681         /* Not implemented, queues only on kernel side */
1682 }
1683
1684 static void hw_scan_work(struct work_struct *work)
1685 {
1686         struct mac80211_hwsim_data *hwsim =
1687                 container_of(work, struct mac80211_hwsim_data, hw_scan.work);
1688         struct cfg80211_scan_request *req = hwsim->hw_scan_request;
1689         int dwell, i;
1690
1691         mutex_lock(&hwsim->mutex);
1692         if (hwsim->scan_chan_idx >= req->n_channels) {
1693                 wiphy_debug(hwsim->hw->wiphy, "hw scan complete\n");
1694                 ieee80211_scan_completed(hwsim->hw, false);
1695                 hwsim->hw_scan_request = NULL;
1696                 hwsim->hw_scan_vif = NULL;
1697                 hwsim->tmp_chan = NULL;
1698                 mutex_unlock(&hwsim->mutex);
1699                 return;
1700         }
1701
1702         wiphy_debug(hwsim->hw->wiphy, "hw scan %d MHz\n",
1703                     req->channels[hwsim->scan_chan_idx]->center_freq);
1704
1705         hwsim->tmp_chan = req->channels[hwsim->scan_chan_idx];
1706         if (hwsim->tmp_chan->flags & IEEE80211_CHAN_NO_IR ||
1707             !req->n_ssids) {
1708                 dwell = 120;
1709         } else {
1710                 dwell = 30;
1711                 /* send probes */
1712                 for (i = 0; i < req->n_ssids; i++) {
1713                         struct sk_buff *probe;
1714
1715                         probe = ieee80211_probereq_get(hwsim->hw,
1716                                                        hwsim->hw_scan_vif,
1717                                                        req->ssids[i].ssid,
1718                                                        req->ssids[i].ssid_len,
1719                                                        req->ie_len);
1720                         if (!probe)
1721                                 continue;
1722
1723                         if (req->ie_len)
1724                                 memcpy(skb_put(probe, req->ie_len), req->ie,
1725                                        req->ie_len);
1726
1727                         local_bh_disable();
1728                         mac80211_hwsim_tx_frame(hwsim->hw, probe,
1729                                                 hwsim->tmp_chan);
1730                         local_bh_enable();
1731                 }
1732         }
1733         ieee80211_queue_delayed_work(hwsim->hw, &hwsim->hw_scan,
1734                                      msecs_to_jiffies(dwell));
1735         hwsim->scan_chan_idx++;
1736         mutex_unlock(&hwsim->mutex);
1737 }
1738
1739 static int mac80211_hwsim_hw_scan(struct ieee80211_hw *hw,
1740                                   struct ieee80211_vif *vif,
1741                                   struct cfg80211_scan_request *req)
1742 {
1743         struct mac80211_hwsim_data *hwsim = hw->priv;
1744
1745         mutex_lock(&hwsim->mutex);
1746         if (WARN_ON(hwsim->tmp_chan || hwsim->hw_scan_request)) {
1747                 mutex_unlock(&hwsim->mutex);
1748                 return -EBUSY;
1749         }
1750         hwsim->hw_scan_request = req;
1751         hwsim->hw_scan_vif = vif;
1752         hwsim->scan_chan_idx = 0;
1753         mutex_unlock(&hwsim->mutex);
1754
1755         wiphy_debug(hw->wiphy, "hwsim hw_scan request\n");
1756
1757         ieee80211_queue_delayed_work(hwsim->hw, &hwsim->hw_scan, 0);
1758
1759         return 0;
1760 }
1761
1762 static void mac80211_hwsim_cancel_hw_scan(struct ieee80211_hw *hw,
1763                                           struct ieee80211_vif *vif)
1764 {
1765         struct mac80211_hwsim_data *hwsim = hw->priv;
1766
1767         wiphy_debug(hw->wiphy, "hwsim cancel_hw_scan\n");
1768
1769         cancel_delayed_work_sync(&hwsim->hw_scan);
1770
1771         mutex_lock(&hwsim->mutex);
1772         ieee80211_scan_completed(hwsim->hw, true);
1773         hwsim->tmp_chan = NULL;
1774         hwsim->hw_scan_request = NULL;
1775         hwsim->hw_scan_vif = NULL;
1776         mutex_unlock(&hwsim->mutex);
1777 }
1778
1779 static void mac80211_hwsim_sw_scan(struct ieee80211_hw *hw)
1780 {
1781         struct mac80211_hwsim_data *hwsim = hw->priv;
1782
1783         mutex_lock(&hwsim->mutex);
1784
1785         if (hwsim->scanning) {
1786                 printk(KERN_DEBUG "two hwsim sw_scans detected!\n");
1787                 goto out;
1788         }
1789
1790         printk(KERN_DEBUG "hwsim sw_scan request, prepping stuff\n");
1791         hwsim->scanning = true;
1792
1793 out:
1794         mutex_unlock(&hwsim->mutex);
1795 }
1796
1797 static void mac80211_hwsim_sw_scan_complete(struct ieee80211_hw *hw)
1798 {
1799         struct mac80211_hwsim_data *hwsim = hw->priv;
1800
1801         mutex_lock(&hwsim->mutex);
1802
1803         printk(KERN_DEBUG "hwsim sw_scan_complete\n");
1804         hwsim->scanning = false;
1805
1806         mutex_unlock(&hwsim->mutex);
1807 }
1808
1809 static void hw_roc_done(struct work_struct *work)
1810 {
1811         struct mac80211_hwsim_data *hwsim =
1812                 container_of(work, struct mac80211_hwsim_data, roc_done.work);
1813
1814         mutex_lock(&hwsim->mutex);
1815         ieee80211_remain_on_channel_expired(hwsim->hw);
1816         hwsim->tmp_chan = NULL;
1817         mutex_unlock(&hwsim->mutex);
1818
1819         wiphy_debug(hwsim->hw->wiphy, "hwsim ROC expired\n");
1820 }
1821
1822 static int mac80211_hwsim_roc(struct ieee80211_hw *hw,
1823                               struct ieee80211_vif *vif,
1824                               struct ieee80211_channel *chan,
1825                               int duration,
1826                               enum ieee80211_roc_type type)
1827 {
1828         struct mac80211_hwsim_data *hwsim = hw->priv;
1829
1830         mutex_lock(&hwsim->mutex);
1831         if (WARN_ON(hwsim->tmp_chan || hwsim->hw_scan_request)) {
1832                 mutex_unlock(&hwsim->mutex);
1833                 return -EBUSY;
1834         }
1835
1836         hwsim->tmp_chan = chan;
1837         mutex_unlock(&hwsim->mutex);
1838
1839         wiphy_debug(hw->wiphy, "hwsim ROC (%d MHz, %d ms)\n",
1840                     chan->center_freq, duration);
1841
1842         ieee80211_ready_on_channel(hw);
1843
1844         ieee80211_queue_delayed_work(hw, &hwsim->roc_done,
1845                                      msecs_to_jiffies(duration));
1846         return 0;
1847 }
1848
1849 static int mac80211_hwsim_croc(struct ieee80211_hw *hw)
1850 {
1851         struct mac80211_hwsim_data *hwsim = hw->priv;
1852
1853         cancel_delayed_work_sync(&hwsim->roc_done);
1854
1855         mutex_lock(&hwsim->mutex);
1856         hwsim->tmp_chan = NULL;
1857         mutex_unlock(&hwsim->mutex);
1858
1859         wiphy_debug(hw->wiphy, "hwsim ROC canceled\n");
1860
1861         return 0;
1862 }
1863
1864 static int mac80211_hwsim_add_chanctx(struct ieee80211_hw *hw,
1865                                       struct ieee80211_chanctx_conf *ctx)
1866 {
1867         hwsim_set_chanctx_magic(ctx);
1868         wiphy_debug(hw->wiphy,
1869                     "add channel context control: %d MHz/width: %d/cfreqs:%d/%d MHz\n",
1870                     ctx->def.chan->center_freq, ctx->def.width,
1871                     ctx->def.center_freq1, ctx->def.center_freq2);
1872         return 0;
1873 }
1874
1875 static void mac80211_hwsim_remove_chanctx(struct ieee80211_hw *hw,
1876                                           struct ieee80211_chanctx_conf *ctx)
1877 {
1878         wiphy_debug(hw->wiphy,
1879                     "remove channel context control: %d MHz/width: %d/cfreqs:%d/%d MHz\n",
1880                     ctx->def.chan->center_freq, ctx->def.width,
1881                     ctx->def.center_freq1, ctx->def.center_freq2);
1882         hwsim_check_chanctx_magic(ctx);
1883         hwsim_clear_chanctx_magic(ctx);
1884 }
1885
1886 static void mac80211_hwsim_change_chanctx(struct ieee80211_hw *hw,
1887                                           struct ieee80211_chanctx_conf *ctx,
1888                                           u32 changed)
1889 {
1890         hwsim_check_chanctx_magic(ctx);
1891         wiphy_debug(hw->wiphy,
1892                     "change channel context control: %d MHz/width: %d/cfreqs:%d/%d MHz\n",
1893                     ctx->def.chan->center_freq, ctx->def.width,
1894                     ctx->def.center_freq1, ctx->def.center_freq2);
1895 }
1896
1897 static int mac80211_hwsim_assign_vif_chanctx(struct ieee80211_hw *hw,
1898                                              struct ieee80211_vif *vif,
1899                                              struct ieee80211_chanctx_conf *ctx)
1900 {
1901         hwsim_check_magic(vif);
1902         hwsim_check_chanctx_magic(ctx);
1903
1904         return 0;
1905 }
1906
1907 static void mac80211_hwsim_unassign_vif_chanctx(struct ieee80211_hw *hw,
1908                                                 struct ieee80211_vif *vif,
1909                                                 struct ieee80211_chanctx_conf *ctx)
1910 {
1911         hwsim_check_magic(vif);
1912         hwsim_check_chanctx_magic(ctx);
1913 }
1914
1915 static const struct ieee80211_ops mac80211_hwsim_ops = {
1916         .tx = mac80211_hwsim_tx,
1917         .start = mac80211_hwsim_start,
1918         .stop = mac80211_hwsim_stop,
1919         .add_interface = mac80211_hwsim_add_interface,
1920         .change_interface = mac80211_hwsim_change_interface,
1921         .remove_interface = mac80211_hwsim_remove_interface,
1922         .config = mac80211_hwsim_config,
1923         .configure_filter = mac80211_hwsim_configure_filter,
1924         .bss_info_changed = mac80211_hwsim_bss_info_changed,
1925         .sta_add = mac80211_hwsim_sta_add,
1926         .sta_remove = mac80211_hwsim_sta_remove,
1927         .sta_notify = mac80211_hwsim_sta_notify,
1928         .set_tim = mac80211_hwsim_set_tim,
1929         .conf_tx = mac80211_hwsim_conf_tx,
1930         .get_survey = mac80211_hwsim_get_survey,
1931         CFG80211_TESTMODE_CMD(mac80211_hwsim_testmode_cmd)
1932         .ampdu_action = mac80211_hwsim_ampdu_action,
1933         .sw_scan_start = mac80211_hwsim_sw_scan,
1934         .sw_scan_complete = mac80211_hwsim_sw_scan_complete,
1935         .flush = mac80211_hwsim_flush,
1936         .get_tsf = mac80211_hwsim_get_tsf,
1937         .set_tsf = mac80211_hwsim_set_tsf,
1938 };
1939
1940 static struct ieee80211_ops mac80211_hwsim_mchan_ops;
1941
1942 static int mac80211_hwsim_create_radio(int channels, const char *reg_alpha2,
1943                                        const struct ieee80211_regdomain *regd,
1944                                        bool reg_strict, bool p2p_device,
1945                                        bool use_chanctx)
1946 {
1947         int err;
1948         u8 addr[ETH_ALEN];
1949         struct mac80211_hwsim_data *data;
1950         struct ieee80211_hw *hw;
1951         enum ieee80211_band band;
1952         const struct ieee80211_ops *ops = &mac80211_hwsim_ops;
1953         int idx;
1954
1955         if (WARN_ON(channels > 1 && !use_chanctx))
1956                 return -EINVAL;
1957
1958         spin_lock_bh(&hwsim_radio_lock);
1959         idx = hwsim_radio_idx++;
1960         spin_unlock_bh(&hwsim_radio_lock);
1961
1962         if (use_chanctx)
1963                 ops = &mac80211_hwsim_mchan_ops;
1964         hw = ieee80211_alloc_hw(sizeof(*data), ops);
1965         if (!hw) {
1966                 printk(KERN_DEBUG "mac80211_hwsim: ieee80211_alloc_hw failed\n");
1967                 err = -ENOMEM;
1968                 goto failed;
1969         }
1970         data = hw->priv;
1971         data->hw = hw;
1972
1973         data->dev = device_create(hwsim_class, NULL, 0, hw, "hwsim%d", idx);
1974         if (IS_ERR(data->dev)) {
1975                 printk(KERN_DEBUG
1976                        "mac80211_hwsim: device_create failed (%ld)\n",
1977                        PTR_ERR(data->dev));
1978                 err = -ENOMEM;
1979                 goto failed_drvdata;
1980         }
1981         data->dev->driver = &mac80211_hwsim_driver.driver;
1982         err = device_bind_driver(data->dev);
1983         if (err != 0) {
1984                 printk(KERN_DEBUG "mac80211_hwsim: device_bind_driver failed (%d)\n",
1985                        err);
1986                 goto failed_hw;
1987         }
1988
1989         skb_queue_head_init(&data->pending);
1990
1991         SET_IEEE80211_DEV(hw, data->dev);
1992         memset(addr, 0, ETH_ALEN);
1993         addr[0] = 0x02;
1994         addr[3] = idx >> 8;
1995         addr[4] = idx;
1996         memcpy(data->addresses[0].addr, addr, ETH_ALEN);
1997         memcpy(data->addresses[1].addr, addr, ETH_ALEN);
1998         data->addresses[1].addr[0] |= 0x40;
1999         hw->wiphy->n_addresses = 2;
2000         hw->wiphy->addresses = data->addresses;
2001
2002         data->channels = channels;
2003         data->use_chanctx = use_chanctx;
2004         data->idx = idx;
2005
2006         if (data->use_chanctx) {
2007                 hw->wiphy->max_scan_ssids = 255;
2008                 hw->wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
2009                 hw->wiphy->max_remain_on_channel_duration = 1000;
2010                 /* For channels > 1 DFS is not allowed */
2011                 hw->wiphy->n_iface_combinations = 1;
2012                 hw->wiphy->iface_combinations = &data->if_combination;
2013                 if (p2p_device)
2014                         data->if_combination = hwsim_if_comb_p2p_dev[0];
2015                 else
2016                         data->if_combination = hwsim_if_comb[0];
2017                 data->if_combination.num_different_channels = data->channels;
2018         } else if (p2p_device) {
2019                 hw->wiphy->iface_combinations = hwsim_if_comb_p2p_dev;
2020                 hw->wiphy->n_iface_combinations =
2021                         ARRAY_SIZE(hwsim_if_comb_p2p_dev);
2022         } else {
2023                 hw->wiphy->iface_combinations = hwsim_if_comb;
2024                 hw->wiphy->n_iface_combinations = ARRAY_SIZE(hwsim_if_comb);
2025         }
2026
2027         INIT_DELAYED_WORK(&data->roc_done, hw_roc_done);
2028         INIT_DELAYED_WORK(&data->hw_scan, hw_scan_work);
2029
2030         hw->queues = 5;
2031         hw->offchannel_tx_hw_queue = 4;
2032         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
2033                                      BIT(NL80211_IFTYPE_AP) |
2034                                      BIT(NL80211_IFTYPE_P2P_CLIENT) |
2035                                      BIT(NL80211_IFTYPE_P2P_GO) |
2036                                      BIT(NL80211_IFTYPE_ADHOC) |
2037                                      BIT(NL80211_IFTYPE_MESH_POINT);
2038
2039         if (p2p_device)
2040                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_P2P_DEVICE);
2041
2042         hw->flags = IEEE80211_HW_MFP_CAPABLE |
2043                     IEEE80211_HW_SIGNAL_DBM |
2044                     IEEE80211_HW_SUPPORTS_STATIC_SMPS |
2045                     IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
2046                     IEEE80211_HW_AMPDU_AGGREGATION |
2047                     IEEE80211_HW_WANT_MONITOR_VIF |
2048                     IEEE80211_HW_QUEUE_CONTROL |
2049                     IEEE80211_HW_SUPPORTS_HT_CCK_RATES |
2050                     IEEE80211_HW_CHANCTX_STA_CSA;
2051         if (rctbl)
2052                 hw->flags |= IEEE80211_HW_SUPPORTS_RC_TABLE;
2053
2054         hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS |
2055                             WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL |
2056                             WIPHY_FLAG_AP_UAPSD |
2057                             WIPHY_FLAG_HAS_CHANNEL_SWITCH;
2058         hw->wiphy->features |= NL80211_FEATURE_ACTIVE_MONITOR;
2059
2060         /* ask mac80211 to reserve space for magic */
2061         hw->vif_data_size = sizeof(struct hwsim_vif_priv);
2062         hw->sta_data_size = sizeof(struct hwsim_sta_priv);
2063         hw->chanctx_data_size = sizeof(struct hwsim_chanctx_priv);
2064
2065         memcpy(data->channels_2ghz, hwsim_channels_2ghz,
2066                 sizeof(hwsim_channels_2ghz));
2067         memcpy(data->channels_5ghz, hwsim_channels_5ghz,
2068                 sizeof(hwsim_channels_5ghz));
2069         memcpy(data->rates, hwsim_rates, sizeof(hwsim_rates));
2070
2071         for (band = IEEE80211_BAND_2GHZ; band < IEEE80211_NUM_BANDS; band++) {
2072                 struct ieee80211_supported_band *sband = &data->bands[band];
2073                 switch (band) {
2074                 case IEEE80211_BAND_2GHZ:
2075                         sband->channels = data->channels_2ghz;
2076                         sband->n_channels = ARRAY_SIZE(hwsim_channels_2ghz);
2077                         sband->bitrates = data->rates;
2078                         sband->n_bitrates = ARRAY_SIZE(hwsim_rates);
2079                         break;
2080                 case IEEE80211_BAND_5GHZ:
2081                         sband->channels = data->channels_5ghz;
2082                         sband->n_channels = ARRAY_SIZE(hwsim_channels_5ghz);
2083                         sband->bitrates = data->rates + 4;
2084                         sband->n_bitrates = ARRAY_SIZE(hwsim_rates) - 4;
2085                         break;
2086                 default:
2087                         continue;
2088                 }
2089
2090                 sband->ht_cap.ht_supported = true;
2091                 sband->ht_cap.cap = IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
2092                                     IEEE80211_HT_CAP_GRN_FLD |
2093                                     IEEE80211_HT_CAP_SGI_40 |
2094                                     IEEE80211_HT_CAP_DSSSCCK40;
2095                 sband->ht_cap.ampdu_factor = 0x3;
2096                 sband->ht_cap.ampdu_density = 0x6;
2097                 memset(&sband->ht_cap.mcs, 0,
2098                        sizeof(sband->ht_cap.mcs));
2099                 sband->ht_cap.mcs.rx_mask[0] = 0xff;
2100                 sband->ht_cap.mcs.rx_mask[1] = 0xff;
2101                 sband->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
2102
2103                 hw->wiphy->bands[band] = sband;
2104
2105                 sband->vht_cap.vht_supported = true;
2106                 sband->vht_cap.cap =
2107                         IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454 |
2108                         IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ |
2109                         IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ |
2110                         IEEE80211_VHT_CAP_RXLDPC |
2111                         IEEE80211_VHT_CAP_SHORT_GI_80 |
2112                         IEEE80211_VHT_CAP_SHORT_GI_160 |
2113                         IEEE80211_VHT_CAP_TXSTBC |
2114                         IEEE80211_VHT_CAP_RXSTBC_1 |
2115                         IEEE80211_VHT_CAP_RXSTBC_2 |
2116                         IEEE80211_VHT_CAP_RXSTBC_3 |
2117                         IEEE80211_VHT_CAP_RXSTBC_4 |
2118                         IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
2119                 sband->vht_cap.vht_mcs.rx_mcs_map =
2120                         cpu_to_le16(IEEE80211_VHT_MCS_SUPPORT_0_8 << 0 |
2121                                     IEEE80211_VHT_MCS_SUPPORT_0_8 << 2 |
2122                                     IEEE80211_VHT_MCS_SUPPORT_0_9 << 4 |
2123                                     IEEE80211_VHT_MCS_SUPPORT_0_8 << 6 |
2124                                     IEEE80211_VHT_MCS_SUPPORT_0_8 << 8 |
2125                                     IEEE80211_VHT_MCS_SUPPORT_0_9 << 10 |
2126                                     IEEE80211_VHT_MCS_SUPPORT_0_9 << 12 |
2127                                     IEEE80211_VHT_MCS_SUPPORT_0_8 << 14);
2128                 sband->vht_cap.vht_mcs.tx_mcs_map =
2129                         sband->vht_cap.vht_mcs.rx_mcs_map;
2130         }
2131
2132         /* By default all radios belong to the first group */
2133         data->group = 1;
2134         mutex_init(&data->mutex);
2135
2136         /* Enable frame retransmissions for lossy channels */
2137         hw->max_rates = 4;
2138         hw->max_rate_tries = 11;
2139
2140         if (reg_strict)
2141                 hw->wiphy->regulatory_flags |= REGULATORY_STRICT_REG;
2142         if (regd) {
2143                 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG;
2144                 wiphy_apply_custom_regulatory(hw->wiphy, regd);
2145                 /* give the regulatory workqueue a chance to run */
2146                 schedule_timeout_interruptible(1);
2147         }
2148
2149         err = ieee80211_register_hw(hw);
2150         if (err < 0) {
2151                 printk(KERN_DEBUG "mac80211_hwsim: ieee80211_register_hw failed (%d)\n",
2152                        err);
2153                 goto failed_hw;
2154         }
2155
2156         wiphy_debug(hw->wiphy, "hwaddr %pM registered\n", hw->wiphy->perm_addr);
2157
2158         if (reg_alpha2)
2159                 regulatory_hint(hw->wiphy, reg_alpha2);
2160
2161         data->debugfs = debugfs_create_dir("hwsim", hw->wiphy->debugfsdir);
2162         debugfs_create_file("ps", 0666, data->debugfs, data, &hwsim_fops_ps);
2163         debugfs_create_file("group", 0666, data->debugfs, data,
2164                             &hwsim_fops_group);
2165         if (!data->use_chanctx)
2166                 debugfs_create_file("dfs_simulate_radar", 0222,
2167                                     data->debugfs,
2168                                     data, &hwsim_simulate_radar);
2169
2170         tasklet_hrtimer_init(&data->beacon_timer,
2171                              mac80211_hwsim_beacon,
2172                              CLOCK_MONOTONIC_RAW, HRTIMER_MODE_ABS);
2173
2174         spin_lock_bh(&hwsim_radio_lock);
2175         list_add_tail(&data->list, &hwsim_radios);
2176         spin_unlock_bh(&hwsim_radio_lock);
2177
2178         return idx;
2179
2180 failed_hw:
2181         device_unregister(data->dev);
2182 failed_drvdata:
2183         ieee80211_free_hw(hw);
2184 failed:
2185         return err;
2186 }
2187
2188 static void mac80211_hwsim_destroy_radio(struct mac80211_hwsim_data *data)
2189 {
2190         debugfs_remove_recursive(data->debugfs);
2191         ieee80211_unregister_hw(data->hw);
2192         device_release_driver(data->dev);
2193         device_unregister(data->dev);
2194         ieee80211_free_hw(data->hw);
2195 }
2196
2197 static void mac80211_hwsim_free(void)
2198 {
2199         struct mac80211_hwsim_data *data;
2200
2201         spin_lock_bh(&hwsim_radio_lock);
2202         while ((data = list_first_entry_or_null(&hwsim_radios,
2203                                                 struct mac80211_hwsim_data,
2204                                                 list))) {
2205                 list_del(&data->list);
2206                 spin_unlock_bh(&hwsim_radio_lock);
2207                 mac80211_hwsim_destroy_radio(data);
2208                 spin_lock_bh(&hwsim_radio_lock);
2209         }
2210         spin_unlock_bh(&hwsim_radio_lock);
2211         class_destroy(hwsim_class);
2212 }
2213
2214 static const struct net_device_ops hwsim_netdev_ops = {
2215         .ndo_start_xmit         = hwsim_mon_xmit,
2216         .ndo_change_mtu         = eth_change_mtu,
2217         .ndo_set_mac_address    = eth_mac_addr,
2218         .ndo_validate_addr      = eth_validate_addr,
2219 };
2220
2221 static void hwsim_mon_setup(struct net_device *dev)
2222 {
2223         dev->netdev_ops = &hwsim_netdev_ops;
2224         dev->destructor = free_netdev;
2225         ether_setup(dev);
2226         dev->tx_queue_len = 0;
2227         dev->type = ARPHRD_IEEE80211_RADIOTAP;
2228         memset(dev->dev_addr, 0, ETH_ALEN);
2229         dev->dev_addr[0] = 0x12;
2230 }
2231
2232 static struct mac80211_hwsim_data *get_hwsim_data_ref_from_addr(const u8 *addr)
2233 {
2234         struct mac80211_hwsim_data *data;
2235         bool _found = false;
2236
2237         spin_lock_bh(&hwsim_radio_lock);
2238         list_for_each_entry(data, &hwsim_radios, list) {
2239                 if (memcmp(data->addresses[1].addr, addr, ETH_ALEN) == 0) {
2240                         _found = true;
2241                         break;
2242                 }
2243         }
2244         spin_unlock_bh(&hwsim_radio_lock);
2245
2246         if (!_found)
2247                 return NULL;
2248
2249         return data;
2250 }
2251
2252 static int hwsim_tx_info_frame_received_nl(struct sk_buff *skb_2,
2253                                            struct genl_info *info)
2254 {
2255
2256         struct ieee80211_hdr *hdr;
2257         struct mac80211_hwsim_data *data2;
2258         struct ieee80211_tx_info *txi;
2259         struct hwsim_tx_rate *tx_attempts;
2260         unsigned long ret_skb_ptr;
2261         struct sk_buff *skb, *tmp;
2262         const u8 *src;
2263         unsigned int hwsim_flags;
2264         int i;
2265         bool found = false;
2266
2267         if (info->snd_portid != wmediumd_portid)
2268                 return -EINVAL;
2269
2270         if (!info->attrs[HWSIM_ATTR_ADDR_TRANSMITTER] ||
2271             !info->attrs[HWSIM_ATTR_FLAGS] ||
2272             !info->attrs[HWSIM_ATTR_COOKIE] ||
2273             !info->attrs[HWSIM_ATTR_TX_INFO])
2274                 goto out;
2275
2276         src = (void *)nla_data(info->attrs[HWSIM_ATTR_ADDR_TRANSMITTER]);
2277         hwsim_flags = nla_get_u32(info->attrs[HWSIM_ATTR_FLAGS]);
2278         ret_skb_ptr = nla_get_u64(info->attrs[HWSIM_ATTR_COOKIE]);
2279
2280         data2 = get_hwsim_data_ref_from_addr(src);
2281         if (!data2)
2282                 goto out;
2283
2284         /* look for the skb matching the cookie passed back from user */
2285         skb_queue_walk_safe(&data2->pending, skb, tmp) {
2286                 if ((unsigned long)skb == ret_skb_ptr) {
2287                         skb_unlink(skb, &data2->pending);
2288                         found = true;
2289                         break;
2290                 }
2291         }
2292
2293         /* not found */
2294         if (!found)
2295                 goto out;
2296
2297         /* Tx info received because the frame was broadcasted on user space,
2298          so we get all the necessary info: tx attempts and skb control buff */
2299
2300         tx_attempts = (struct hwsim_tx_rate *)nla_data(
2301                        info->attrs[HWSIM_ATTR_TX_INFO]);
2302
2303         /* now send back TX status */
2304         txi = IEEE80211_SKB_CB(skb);
2305
2306         ieee80211_tx_info_clear_status(txi);
2307
2308         for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
2309                 txi->status.rates[i].idx = tx_attempts[i].idx;
2310                 txi->status.rates[i].count = tx_attempts[i].count;
2311                 /*txi->status.rates[i].flags = 0;*/
2312         }
2313
2314         txi->status.ack_signal = nla_get_u32(info->attrs[HWSIM_ATTR_SIGNAL]);
2315
2316         if (!(hwsim_flags & HWSIM_TX_CTL_NO_ACK) &&
2317            (hwsim_flags & HWSIM_TX_STAT_ACK)) {
2318                 if (skb->len >= 16) {
2319                         hdr = (struct ieee80211_hdr *) skb->data;
2320                         mac80211_hwsim_monitor_ack(data2->channel,
2321                                                    hdr->addr2);
2322                 }
2323                 txi->flags |= IEEE80211_TX_STAT_ACK;
2324         }
2325         ieee80211_tx_status_irqsafe(data2->hw, skb);
2326         return 0;
2327 out:
2328         return -EINVAL;
2329
2330 }
2331
2332 static int hwsim_cloned_frame_received_nl(struct sk_buff *skb_2,
2333                                           struct genl_info *info)
2334 {
2335
2336         struct mac80211_hwsim_data *data2;
2337         struct ieee80211_rx_status rx_status;
2338         const u8 *dst;
2339         int frame_data_len;
2340         void *frame_data;
2341         struct sk_buff *skb = NULL;
2342
2343         if (info->snd_portid != wmediumd_portid)
2344                 return -EINVAL;
2345
2346         if (!info->attrs[HWSIM_ATTR_ADDR_RECEIVER] ||
2347             !info->attrs[HWSIM_ATTR_FRAME] ||
2348             !info->attrs[HWSIM_ATTR_RX_RATE] ||
2349             !info->attrs[HWSIM_ATTR_SIGNAL])
2350                 goto out;
2351
2352         dst = (void *)nla_data(info->attrs[HWSIM_ATTR_ADDR_RECEIVER]);
2353         frame_data_len = nla_len(info->attrs[HWSIM_ATTR_FRAME]);
2354         frame_data = (void *)nla_data(info->attrs[HWSIM_ATTR_FRAME]);
2355
2356         /* Allocate new skb here */
2357         skb = alloc_skb(frame_data_len, GFP_KERNEL);
2358         if (skb == NULL)
2359                 goto err;
2360
2361         if (frame_data_len > IEEE80211_MAX_DATA_LEN)
2362                 goto err;
2363
2364         /* Copy the data */
2365         memcpy(skb_put(skb, frame_data_len), frame_data, frame_data_len);
2366
2367         data2 = get_hwsim_data_ref_from_addr(dst);
2368         if (!data2)
2369                 goto out;
2370
2371         /* check if radio is configured properly */
2372
2373         if (data2->idle || !data2->started)
2374                 goto out;
2375
2376         /* A frame is received from user space */
2377         memset(&rx_status, 0, sizeof(rx_status));
2378         rx_status.freq = data2->channel->center_freq;
2379         rx_status.band = data2->channel->band;
2380         rx_status.rate_idx = nla_get_u32(info->attrs[HWSIM_ATTR_RX_RATE]);
2381         rx_status.signal = nla_get_u32(info->attrs[HWSIM_ATTR_SIGNAL]);
2382
2383         memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
2384         ieee80211_rx_irqsafe(data2->hw, skb);
2385
2386         return 0;
2387 err:
2388         printk(KERN_DEBUG "mac80211_hwsim: error occurred in %s\n", __func__);
2389         goto out;
2390 out:
2391         dev_kfree_skb(skb);
2392         return -EINVAL;
2393 }
2394
2395 static int hwsim_register_received_nl(struct sk_buff *skb_2,
2396                                       struct genl_info *info)
2397 {
2398         struct mac80211_hwsim_data *data;
2399         int chans = 1;
2400
2401         spin_lock_bh(&hwsim_radio_lock);
2402         list_for_each_entry(data, &hwsim_radios, list)
2403                 chans = max(chans, data->channels);
2404         spin_unlock_bh(&hwsim_radio_lock);
2405
2406         /* In the future we should revise the userspace API and allow it
2407          * to set a flag that it does support multi-channel, then we can
2408          * let this pass conditionally on the flag.
2409          * For current userspace, prohibit it since it won't work right.
2410          */
2411         if (chans > 1)
2412                 return -EOPNOTSUPP;
2413
2414         if (wmediumd_portid)
2415                 return -EBUSY;
2416
2417         wmediumd_portid = info->snd_portid;
2418
2419         printk(KERN_DEBUG "mac80211_hwsim: received a REGISTER, "
2420                "switching to wmediumd mode with pid %d\n", info->snd_portid);
2421
2422         return 0;
2423 }
2424
2425 static int hwsim_create_radio_nl(struct sk_buff *msg, struct genl_info *info)
2426 {
2427         unsigned int chans = channels;
2428         const char *alpha2 = NULL;
2429         const struct ieee80211_regdomain *regd = NULL;
2430         bool reg_strict = info->attrs[HWSIM_ATTR_REG_STRICT_REG];
2431         bool p2p_device = info->attrs[HWSIM_ATTR_SUPPORT_P2P_DEVICE];
2432         bool use_chanctx;
2433
2434         if (info->attrs[HWSIM_ATTR_CHANNELS])
2435                 chans = nla_get_u32(info->attrs[HWSIM_ATTR_CHANNELS]);
2436
2437         if (info->attrs[HWSIM_ATTR_USE_CHANCTX])
2438                 use_chanctx = true;
2439         else
2440                 use_chanctx = (chans > 1);
2441
2442         if (info->attrs[HWSIM_ATTR_REG_HINT_ALPHA2])
2443                 alpha2 = nla_data(info->attrs[HWSIM_ATTR_REG_HINT_ALPHA2]);
2444
2445         if (info->attrs[HWSIM_ATTR_REG_CUSTOM_REG]) {
2446                 u32 idx = nla_get_u32(info->attrs[HWSIM_ATTR_REG_CUSTOM_REG]);
2447
2448                 if (idx >= ARRAY_SIZE(hwsim_world_regdom_custom))
2449                         return -EINVAL;
2450                 regd = hwsim_world_regdom_custom[idx];
2451         }
2452
2453         return mac80211_hwsim_create_radio(chans, alpha2, regd, reg_strict,
2454                                            p2p_device, use_chanctx);
2455 }
2456
2457 static int hwsim_destroy_radio_nl(struct sk_buff *msg, struct genl_info *info)
2458 {
2459         struct mac80211_hwsim_data *data;
2460         int idx;
2461
2462         if (!info->attrs[HWSIM_ATTR_RADIO_ID])
2463                 return -EINVAL;
2464         idx = nla_get_u32(info->attrs[HWSIM_ATTR_RADIO_ID]);
2465
2466         spin_lock_bh(&hwsim_radio_lock);
2467         list_for_each_entry(data, &hwsim_radios, list) {
2468                 if (data->idx != idx)
2469                         continue;
2470                 list_del(&data->list);
2471                 spin_unlock_bh(&hwsim_radio_lock);
2472                 mac80211_hwsim_destroy_radio(data);
2473                 return 0;
2474         }
2475         spin_unlock_bh(&hwsim_radio_lock);
2476
2477         return -ENODEV;
2478 }
2479
2480 /* Generic Netlink operations array */
2481 static const struct genl_ops hwsim_ops[] = {
2482         {
2483                 .cmd = HWSIM_CMD_REGISTER,
2484                 .policy = hwsim_genl_policy,
2485                 .doit = hwsim_register_received_nl,
2486                 .flags = GENL_ADMIN_PERM,
2487         },
2488         {
2489                 .cmd = HWSIM_CMD_FRAME,
2490                 .policy = hwsim_genl_policy,
2491                 .doit = hwsim_cloned_frame_received_nl,
2492         },
2493         {
2494                 .cmd = HWSIM_CMD_TX_INFO_FRAME,
2495                 .policy = hwsim_genl_policy,
2496                 .doit = hwsim_tx_info_frame_received_nl,
2497         },
2498         {
2499                 .cmd = HWSIM_CMD_CREATE_RADIO,
2500                 .policy = hwsim_genl_policy,
2501                 .doit = hwsim_create_radio_nl,
2502                 .flags = GENL_ADMIN_PERM,
2503         },
2504         {
2505                 .cmd = HWSIM_CMD_DESTROY_RADIO,
2506                 .policy = hwsim_genl_policy,
2507                 .doit = hwsim_destroy_radio_nl,
2508                 .flags = GENL_ADMIN_PERM,
2509         },
2510 };
2511
2512 static int mac80211_hwsim_netlink_notify(struct notifier_block *nb,
2513                                          unsigned long state,
2514                                          void *_notify)
2515 {
2516         struct netlink_notify *notify = _notify;
2517
2518         if (state != NETLINK_URELEASE)
2519                 return NOTIFY_DONE;
2520
2521         if (notify->portid == wmediumd_portid) {
2522                 printk(KERN_INFO "mac80211_hwsim: wmediumd released netlink"
2523                        " socket, switching to perfect channel medium\n");
2524                 wmediumd_portid = 0;
2525         }
2526         return NOTIFY_DONE;
2527
2528 }
2529
2530 static struct notifier_block hwsim_netlink_notifier = {
2531         .notifier_call = mac80211_hwsim_netlink_notify,
2532 };
2533
2534 static int hwsim_init_netlink(void)
2535 {
2536         int rc;
2537
2538         printk(KERN_INFO "mac80211_hwsim: initializing netlink\n");
2539
2540         rc = genl_register_family_with_ops(&hwsim_genl_family, hwsim_ops);
2541         if (rc)
2542                 goto failure;
2543
2544         rc = netlink_register_notifier(&hwsim_netlink_notifier);
2545         if (rc)
2546                 goto failure;
2547
2548         return 0;
2549
2550 failure:
2551         printk(KERN_DEBUG "mac80211_hwsim: error occurred in %s\n", __func__);
2552         return -EINVAL;
2553 }
2554
2555 static void hwsim_exit_netlink(void)
2556 {
2557         /* unregister the notifier */
2558         netlink_unregister_notifier(&hwsim_netlink_notifier);
2559         /* unregister the family */
2560         genl_unregister_family(&hwsim_genl_family);
2561 }
2562
2563 static int __init init_mac80211_hwsim(void)
2564 {
2565         int i, err;
2566
2567         if (radios < 0 || radios > 100)
2568                 return -EINVAL;
2569
2570         if (channels < 1)
2571                 return -EINVAL;
2572
2573         mac80211_hwsim_mchan_ops = mac80211_hwsim_ops;
2574         mac80211_hwsim_mchan_ops.hw_scan = mac80211_hwsim_hw_scan;
2575         mac80211_hwsim_mchan_ops.cancel_hw_scan = mac80211_hwsim_cancel_hw_scan;
2576         mac80211_hwsim_mchan_ops.sw_scan_start = NULL;
2577         mac80211_hwsim_mchan_ops.sw_scan_complete = NULL;
2578         mac80211_hwsim_mchan_ops.remain_on_channel = mac80211_hwsim_roc;
2579         mac80211_hwsim_mchan_ops.cancel_remain_on_channel = mac80211_hwsim_croc;
2580         mac80211_hwsim_mchan_ops.add_chanctx = mac80211_hwsim_add_chanctx;
2581         mac80211_hwsim_mchan_ops.remove_chanctx = mac80211_hwsim_remove_chanctx;
2582         mac80211_hwsim_mchan_ops.change_chanctx = mac80211_hwsim_change_chanctx;
2583         mac80211_hwsim_mchan_ops.assign_vif_chanctx =
2584                 mac80211_hwsim_assign_vif_chanctx;
2585         mac80211_hwsim_mchan_ops.unassign_vif_chanctx =
2586                 mac80211_hwsim_unassign_vif_chanctx;
2587
2588         spin_lock_init(&hwsim_radio_lock);
2589         INIT_LIST_HEAD(&hwsim_radios);
2590
2591         err = platform_driver_register(&mac80211_hwsim_driver);
2592         if (err)
2593                 return err;
2594
2595         hwsim_class = class_create(THIS_MODULE, "mac80211_hwsim");
2596         if (IS_ERR(hwsim_class)) {
2597                 err = PTR_ERR(hwsim_class);
2598                 goto out_unregister_driver;
2599         }
2600
2601         for (i = 0; i < radios; i++) {
2602                 const char *reg_alpha2 = NULL;
2603                 const struct ieee80211_regdomain *regd = NULL;
2604                 bool reg_strict = false;
2605
2606                 switch (regtest) {
2607                 case HWSIM_REGTEST_DIFF_COUNTRY:
2608                         if (i < ARRAY_SIZE(hwsim_alpha2s))
2609                                 reg_alpha2 = hwsim_alpha2s[i];
2610                         break;
2611                 case HWSIM_REGTEST_DRIVER_REG_FOLLOW:
2612                         if (!i)
2613                                 reg_alpha2 = hwsim_alpha2s[0];
2614                         break;
2615                 case HWSIM_REGTEST_STRICT_ALL:
2616                         reg_strict = true;
2617                 case HWSIM_REGTEST_DRIVER_REG_ALL:
2618                         reg_alpha2 = hwsim_alpha2s[0];
2619                         break;
2620                 case HWSIM_REGTEST_WORLD_ROAM:
2621                         if (i == 0)
2622                                 regd = &hwsim_world_regdom_custom_01;
2623                         break;
2624                 case HWSIM_REGTEST_CUSTOM_WORLD:
2625                         regd = &hwsim_world_regdom_custom_01;
2626                         break;
2627                 case HWSIM_REGTEST_CUSTOM_WORLD_2:
2628                         if (i == 0)
2629                                 regd = &hwsim_world_regdom_custom_01;
2630                         else if (i == 1)
2631                                 regd = &hwsim_world_regdom_custom_02;
2632                         break;
2633                 case HWSIM_REGTEST_STRICT_FOLLOW:
2634                         if (i == 0) {
2635                                 reg_strict = true;
2636                                 reg_alpha2 = hwsim_alpha2s[0];
2637                         }
2638                         break;
2639                 case HWSIM_REGTEST_STRICT_AND_DRIVER_REG:
2640                         if (i == 0) {
2641                                 reg_strict = true;
2642                                 reg_alpha2 = hwsim_alpha2s[0];
2643                         } else if (i == 1) {
2644                                 reg_alpha2 = hwsim_alpha2s[1];
2645                         }
2646                         break;
2647                 case HWSIM_REGTEST_ALL:
2648                         switch (i) {
2649                         case 0:
2650                                 regd = &hwsim_world_regdom_custom_01;
2651                                 break;
2652                         case 1:
2653                                 regd = &hwsim_world_regdom_custom_02;
2654                                 break;
2655                         case 2:
2656                                 reg_alpha2 = hwsim_alpha2s[0];
2657                                 break;
2658                         case 3:
2659                                 reg_alpha2 = hwsim_alpha2s[1];
2660                                 break;
2661                         case 4:
2662                                 reg_strict = true;
2663                                 reg_alpha2 = hwsim_alpha2s[2];
2664                                 break;
2665                         }
2666                         break;
2667                 default:
2668                         break;
2669                 }
2670
2671                 err = mac80211_hwsim_create_radio(channels, reg_alpha2,
2672                                                   regd, reg_strict,
2673                                                   support_p2p_device,
2674                                                   channels > 1);
2675                 if (err < 0)
2676                         goto out_free_radios;
2677         }
2678
2679         hwsim_mon = alloc_netdev(0, "hwsim%d", hwsim_mon_setup);
2680         if (hwsim_mon == NULL) {
2681                 err = -ENOMEM;
2682                 goto out_free_radios;
2683         }
2684
2685         rtnl_lock();
2686         err = dev_alloc_name(hwsim_mon, hwsim_mon->name);
2687         if (err < 0) {
2688                 rtnl_unlock();
2689                 goto out_free_radios;
2690         }
2691
2692         err = register_netdevice(hwsim_mon);
2693         if (err < 0) {
2694                 rtnl_unlock();
2695                 goto out_free_mon;
2696         }
2697         rtnl_unlock();
2698
2699         err = hwsim_init_netlink();
2700         if (err < 0)
2701                 goto out_free_mon;
2702
2703         return 0;
2704
2705 out_free_mon:
2706         free_netdev(hwsim_mon);
2707 out_free_radios:
2708         mac80211_hwsim_free();
2709 out_unregister_driver:
2710         platform_driver_unregister(&mac80211_hwsim_driver);
2711         return err;
2712 }
2713 module_init(init_mac80211_hwsim);
2714
2715 static void __exit exit_mac80211_hwsim(void)
2716 {
2717         printk(KERN_DEBUG "mac80211_hwsim: unregister radios\n");
2718
2719         hwsim_exit_netlink();
2720
2721         mac80211_hwsim_free();
2722         unregister_netdev(hwsim_mon);
2723         platform_driver_unregister(&mac80211_hwsim_driver);
2724 }
2725 module_exit(exit_mac80211_hwsim);