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         u64 delta = abs64(tsf - now);
 689
 690         /* adjust after beaconing with new timestamp at old TBTT */
 691         if (tsf > now) {
 692                 data->tsf_offset += delta;
 693                 data->bcn_delta = do_div(delta, bcn_int);
 694         } else {
 695                 data->tsf_offset -= delta;
 696                 data->bcn_delta = -do_div(delta, bcn_int);
 697         }
 698 }
 699
 700 static void mac80211_hwsim_monitor_rx(struct ieee80211_hw *hw,
 701                                       struct sk_buff *tx_skb,
 702                                       struct ieee80211_channel *chan)
 703 {
 704         struct mac80211_hwsim_data *data = hw->priv;
 705         struct sk_buff *skb;
 706         struct hwsim_radiotap_hdr *hdr;
 707         u16 flags;
 708         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_skb);
 709         struct ieee80211_rate *txrate = ieee80211_get_tx_rate(hw, info);
 710
 711         if (!netif_running(hwsim_mon))
 712                 return;
 713
 714         skb = skb_copy_expand(tx_skb, sizeof(*hdr), 0, GFP_ATOMIC);
 715         if (skb == NULL)
 716                 return;
 717
 718         hdr = (struct hwsim_radiotap_hdr *) skb_push(skb, sizeof(*hdr));
 719         hdr->hdr.it_version = PKTHDR_RADIOTAP_VERSION;
 720         hdr->hdr.it_pad = 0;
 721         hdr->hdr.it_len = cpu_to_le16(sizeof(*hdr));
 722         hdr->hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
 723                                           (1 << IEEE80211_RADIOTAP_RATE) |
 724                                           (1 << IEEE80211_RADIOTAP_TSFT) |
 725                                           (1 << IEEE80211_RADIOTAP_CHANNEL));
 726         hdr->rt_tsft = __mac80211_hwsim_get_tsf(data);
 727         hdr->rt_flags = 0;
 728         hdr->rt_rate = txrate->bitrate / 5;
 729         hdr->rt_channel = cpu_to_le16(chan->center_freq);
 730         flags = IEEE80211_CHAN_2GHZ;
 731         if (txrate->flags & IEEE80211_RATE_ERP_G)
 732                 flags |= IEEE80211_CHAN_OFDM;
 733         else
 734                 flags |= IEEE80211_CHAN_CCK;
 735         hdr->rt_chbitmask = cpu_to_le16(flags);
 736
 737         skb->dev = hwsim_mon;
 738         skb_set_mac_header(skb, 0);
 739         skb->ip_summed = CHECKSUM_UNNECESSARY;
 740         skb->pkt_type = PACKET_OTHERHOST;
 741         skb->protocol = htons(ETH_P_802_2);
 742         memset(skb->cb, 0, sizeof(skb->cb));
 743         netif_rx(skb);
 744 }
 745
 746
 747 static void mac80211_hwsim_monitor_ack(struct ieee80211_channel *chan,
 748                                        const u8 *addr)
 749 {
 750         struct sk_buff *skb;
 751         struct hwsim_radiotap_ack_hdr *hdr;
 752         u16 flags;
 753         struct ieee80211_hdr *hdr11;
 754
 755         if (!netif_running(hwsim_mon))
 756                 return;
 757
 758         skb = dev_alloc_skb(100);
 759         if (skb == NULL)
 760                 return;
 761
 762         hdr = (struct hwsim_radiotap_ack_hdr *) skb_put(skb, sizeof(*hdr));
 763         hdr->hdr.it_version = PKTHDR_RADIOTAP_VERSION;
 764         hdr->hdr.it_pad = 0;
 765         hdr->hdr.it_len = cpu_to_le16(sizeof(*hdr));
 766         hdr->hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
 767                                           (1 << IEEE80211_RADIOTAP_CHANNEL));
 768         hdr->rt_flags = 0;
 769         hdr->pad = 0;
 770         hdr->rt_channel = cpu_to_le16(chan->center_freq);
 771         flags = IEEE80211_CHAN_2GHZ;
 772         hdr->rt_chbitmask = cpu_to_le16(flags);
 773
 774         hdr11 = (struct ieee80211_hdr *) skb_put(skb, 10);
 775         hdr11->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
 776                                            IEEE80211_STYPE_ACK);
 777         hdr11->duration_id = cpu_to_le16(0);
 778         memcpy(hdr11->addr1, addr, ETH_ALEN);
 779
 780         skb->dev = hwsim_mon;
 781         skb_set_mac_header(skb, 0);
 782         skb->ip_summed = CHECKSUM_UNNECESSARY;
 783         skb->pkt_type = PACKET_OTHERHOST;
 784         skb->protocol = htons(ETH_P_802_2);
 785         memset(skb->cb, 0, sizeof(skb->cb));
 786         netif_rx(skb);
 787 }
 788
 789 struct mac80211_hwsim_addr_match_data {
 790         u8 addr[ETH_ALEN];
 791         bool ret;
 792 };
 793
 794 static void mac80211_hwsim_addr_iter(void *data, u8 *mac,
 795                                      struct ieee80211_vif *vif)
 796 {
 797         struct mac80211_hwsim_addr_match_data *md = data;
 798
 799         if (memcmp(mac, md->addr, ETH_ALEN) == 0)
 800                 md->ret = true;
 801 }
 802
 803 static bool mac80211_hwsim_addr_match(struct mac80211_hwsim_data *data,
 804                                       const u8 *addr)
 805 {
 806         struct mac80211_hwsim_addr_match_data md = {
 807                 .ret = false,
 808         };
 809
 810         memcpy(md.addr, addr, ETH_ALEN);
 811
 812         ieee80211_iterate_active_interfaces_atomic(data->hw,
 813                                                    IEEE80211_IFACE_ITER_NORMAL,
 814                                                    mac80211_hwsim_addr_iter,
 815                                                    &md);
 816
 817         return md.ret;
 818 }
 819
 820 static bool hwsim_ps_rx_ok(struct mac80211_hwsim_data *data,
 821                            struct sk_buff *skb)
 822 {
 823         switch (data->ps) {
 824         case PS_DISABLED:
 825                 return true;
 826         case PS_ENABLED:
 827                 return false;
 828         case PS_AUTO_POLL:
 829                 /* TODO: accept (some) Beacons by default and other frames only
 830                  * if pending PS-Poll has been sent */
 831                 return true;
 832         case PS_MANUAL_POLL:
 833                 /* Allow unicast frames to own address if there is a pending
 834                  * PS-Poll */
 835                 if (data->ps_poll_pending &&
 836                     mac80211_hwsim_addr_match(data, skb->data + 4)) {
 837                         data->ps_poll_pending = false;
 838                         return true;
 839                 }
 840                 return false;
 841         }
 842
 843         return true;
 844 }
 845
 846 static void mac80211_hwsim_tx_frame_nl(struct ieee80211_hw *hw,
 847                                        struct sk_buff *my_skb,
 848                                        int dst_portid)
 849 {
 850         struct sk_buff *skb;
 851         struct mac80211_hwsim_data *data = hw->priv;
 852         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) my_skb->data;
 853         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(my_skb);
 854         void *msg_head;
 855         unsigned int hwsim_flags = 0;
 856         int i;
 857         struct hwsim_tx_rate tx_attempts[IEEE80211_TX_MAX_RATES];
 858
 859         if (data->ps != PS_DISABLED)
 860                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 861         /* If the queue contains MAX_QUEUE skb's drop some */
 862         if (skb_queue_len(&data->pending) >= MAX_QUEUE) {
 863                 /* Droping until WARN_QUEUE level */
 864                 while (skb_queue_len(&data->pending) >= WARN_QUEUE)
 865                         skb_dequeue(&data->pending);
 866         }
 867
 868         skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_ATOMIC);
 869         if (skb == NULL)
 870                 goto nla_put_failure;
 871
 872         msg_head = genlmsg_put(skb, 0, 0, &hwsim_genl_family, 0,
 873                                HWSIM_CMD_FRAME);
 874         if (msg_head == NULL) {
 875                 printk(KERN_DEBUG "mac80211_hwsim: problem with msg_head\n");
 876                 goto nla_put_failure;
 877         }
 878
 879         if (nla_put(skb, HWSIM_ATTR_ADDR_TRANSMITTER,
 880                     ETH_ALEN, data->addresses[1].addr))
 881                 goto nla_put_failure;
 882
 883         /* We get the skb->data */
 884         if (nla_put(skb, HWSIM_ATTR_FRAME, my_skb->len, my_skb->data))
 885                 goto nla_put_failure;
 886
 887         /* We get the flags for this transmission, and we translate them to
 888            wmediumd flags  */
 889
 890         if (info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS)
 891                 hwsim_flags |= HWSIM_TX_CTL_REQ_TX_STATUS;
 892
 893         if (info->flags & IEEE80211_TX_CTL_NO_ACK)
 894                 hwsim_flags |= HWSIM_TX_CTL_NO_ACK;
 895
 896         if (nla_put_u32(skb, HWSIM_ATTR_FLAGS, hwsim_flags))
 897                 goto nla_put_failure;
 898
 899         /* We get the tx control (rate and retries) info*/
 900
 901         for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
 902                 tx_attempts[i].idx = info->status.rates[i].idx;
 903                 tx_attempts[i].count = info->status.rates[i].count;
 904         }
 905
 906         if (nla_put(skb, HWSIM_ATTR_TX_INFO,
 907                     sizeof(struct hwsim_tx_rate)*IEEE80211_TX_MAX_RATES,
 908                     tx_attempts))
 909                 goto nla_put_failure;
 910
 911         /* We create a cookie to identify this skb */
 912         if (nla_put_u64(skb, HWSIM_ATTR_COOKIE, (unsigned long) my_skb))
 913                 goto nla_put_failure;
 914
 915         genlmsg_end(skb, msg_head);
 916         genlmsg_unicast(&init_net, skb, dst_portid);
 917
 918         /* Enqueue the packet */
 919         skb_queue_tail(&data->pending, my_skb);
 920         return;
 921
 922 nla_put_failure:
 923         printk(KERN_DEBUG "mac80211_hwsim: error occurred in %s\n", __func__);
 924 }
 925
 926 static bool hwsim_chans_compat(struct ieee80211_channel *c1,
 927                                struct ieee80211_channel *c2)
 928 {
 929         if (!c1 || !c2)
 930                 return false;
 931
 932         return c1->center_freq == c2->center_freq;
 933 }
 934
 935 struct tx_iter_data {
 936         struct ieee80211_channel *channel;
 937         bool receive;
 938 };
 939
 940 static void mac80211_hwsim_tx_iter(void *_data, u8 *addr,
 941                                    struct ieee80211_vif *vif)
 942 {
 943         struct tx_iter_data *data = _data;
 944
 945         if (!vif->chanctx_conf)
 946                 return;
 947
 948         if (!hwsim_chans_compat(data->channel,
 949                                 rcu_dereference(vif->chanctx_conf)->def.chan))
 950                 return;
 951
 952         data->receive = true;
 953 }
 954
 955 static bool mac80211_hwsim_tx_frame_no_nl(struct ieee80211_hw *hw,
 956                                           struct sk_buff *skb,
 957                                           struct ieee80211_channel *chan)
 958 {
 959         struct mac80211_hwsim_data *data = hw->priv, *data2;
 960         bool ack = false;
 961         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 962         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 963         struct ieee80211_rx_status rx_status;
 964         u64 now;
 965
 966         memset(&rx_status, 0, sizeof(rx_status));
 967         rx_status.flag |= RX_FLAG_MACTIME_START;
 968         rx_status.freq = chan->center_freq;
 969         rx_status.band = chan->band;
 970         if (info->control.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) {
 971                 rx_status.rate_idx =
 972                         ieee80211_rate_get_vht_mcs(&info->control.rates[0]);
 973                 rx_status.vht_nss =
 974                         ieee80211_rate_get_vht_nss(&info->control.rates[0]);
 975                 rx_status.flag |= RX_FLAG_VHT;
 976         } else {
 977                 rx_status.rate_idx = info->control.rates[0].idx;
 978                 if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS)
 979                         rx_status.flag |= RX_FLAG_HT;
 980         }
 981         if (info->control.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
 982                 rx_status.flag |= RX_FLAG_40MHZ;
 983         if (info->control.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
 984                 rx_status.flag |= RX_FLAG_SHORT_GI;
 985         /* TODO: simulate real signal strength (and optional packet loss) */
 986         rx_status.signal = data->power_level - 50;
 987
 988         if (data->ps != PS_DISABLED)
 989                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 990
 991         /* release the skb's source info */
 992         skb_orphan(skb);
 993         skb_dst_drop(skb);
 994         skb->mark = 0;
 995         secpath_reset(skb);
 996         nf_reset(skb);
 997
 998         /*
 999          * Get absolute mactime here so all HWs RX at the "same time", and
1000          * absolute TX time for beacon mactime so the timestamp matches.
1001          * Giving beacons a different mactime than non-beacons looks messy, but
1002          * it helps the Toffset be exact and a ~10us mactime discrepancy
1003          * probably doesn't really matter.
1004          */
1005         if (ieee80211_is_beacon(hdr->frame_control) ||
1006             ieee80211_is_probe_resp(hdr->frame_control))
1007                 now = data->abs_bcn_ts;
1008         else
1009                 now = mac80211_hwsim_get_tsf_raw();
1010
1011         /* Copy skb to all enabled radios that are on the current frequency */
1012         spin_lock(&hwsim_radio_lock);
1013         list_for_each_entry(data2, &hwsim_radios, list) {
1014                 struct sk_buff *nskb;
1015                 struct tx_iter_data tx_iter_data = {
1016                         .receive = false,
1017                         .channel = chan,
1018                 };
1019
1020                 if (data == data2)
1021                         continue;
1022
1023                 if (!data2->started || (data2->idle && !data2->tmp_chan) ||
1024                     !hwsim_ps_rx_ok(data2, skb))
1025                         continue;
1026
1027                 if (!(data->group & data2->group))
1028                         continue;
1029
1030                 if (!hwsim_chans_compat(chan, data2->tmp_chan) &&
1031                     !hwsim_chans_compat(chan, data2->channel)) {
1032                         ieee80211_iterate_active_interfaces_atomic(
1033                                 data2->hw, IEEE80211_IFACE_ITER_NORMAL,
1034                                 mac80211_hwsim_tx_iter, &tx_iter_data);
1035                         if (!tx_iter_data.receive)
1036                                 continue;
1037                 }
1038
1039                 /*
1040                  * reserve some space for our vendor and the normal
1041                  * radiotap header, since we're copying anyway
1042                  */
1043                 if (skb->len < PAGE_SIZE && paged_rx) {
1044                         struct page *page = alloc_page(GFP_ATOMIC);
1045
1046                         if (!page)
1047                                 continue;
1048
1049                         nskb = dev_alloc_skb(128);
1050                         if (!nskb) {
1051                                 __free_page(page);
1052                                 continue;
1053                         }
1054
1055                         memcpy(page_address(page), skb->data, skb->len);
1056                         skb_add_rx_frag(nskb, 0, page, 0, skb->len, skb->len);
1057                 } else {
1058                         nskb = skb_copy(skb, GFP_ATOMIC);
1059                         if (!nskb)
1060                                 continue;
1061                 }
1062
1063                 if (mac80211_hwsim_addr_match(data2, hdr->addr1))
1064                         ack = true;
1065
1066                 rx_status.mactime = now + data2->tsf_offset;
1067
1068                 memcpy(IEEE80211_SKB_RXCB(nskb), &rx_status, sizeof(rx_status));
1069                 ieee80211_rx_irqsafe(data2->hw, nskb);
1070         }
1071         spin_unlock(&hwsim_radio_lock);
1072
1073         return ack;
1074 }
1075
1076 static void mac80211_hwsim_tx(struct ieee80211_hw *hw,
1077                               struct ieee80211_tx_control *control,
1078                               struct sk_buff *skb)
1079 {
1080         struct mac80211_hwsim_data *data = hw->priv;
1081         struct ieee80211_tx_info *txi = IEEE80211_SKB_CB(skb);
1082         struct ieee80211_chanctx_conf *chanctx_conf;
1083         struct ieee80211_channel *channel;
1084         bool ack;
1085         u32 _portid;
1086
1087         if (WARN_ON(skb->len < 10)) {
1088                 /* Should not happen; just a sanity check for addr1 use */
1089                 ieee80211_free_txskb(hw, skb);
1090                 return;
1091         }
1092
1093         if (!data->use_chanctx) {
1094                 channel = data->channel;
1095         } else if (txi->hw_queue == 4) {
1096                 channel = data->tmp_chan;
1097         } else {
1098                 chanctx_conf = rcu_dereference(txi->control.vif->chanctx_conf);
1099                 if (chanctx_conf)
1100                         channel = chanctx_conf->def.chan;
1101                 else
1102                         channel = NULL;
1103         }
1104
1105         if (WARN(!channel, "TX w/o channel - queue = %d\n", txi->hw_queue)) {
1106                 ieee80211_free_txskb(hw, skb);
1107                 return;
1108         }
1109
1110         if (data->idle && !data->tmp_chan) {
1111                 wiphy_debug(hw->wiphy, "Trying to TX when idle - reject\n");
1112                 ieee80211_free_txskb(hw, skb);
1113                 return;
1114         }
1115
1116         if (txi->control.vif)
1117                 hwsim_check_magic(txi->control.vif);
1118         if (control->sta)
1119                 hwsim_check_sta_magic(control->sta);
1120
1121         if (hw->flags & IEEE80211_HW_SUPPORTS_RC_TABLE)
1122                 ieee80211_get_tx_rates(txi->control.vif, control->sta, skb,
1123                                        txi->control.rates,
1124                                        ARRAY_SIZE(txi->control.rates));
1125
1126         txi->rate_driver_data[0] = channel;
1127         mac80211_hwsim_monitor_rx(hw, skb, channel);
1128
1129         /* wmediumd mode check */
1130         _portid = ACCESS_ONCE(wmediumd_portid);
1131
1132         if (_portid)
1133                 return mac80211_hwsim_tx_frame_nl(hw, skb, _portid);
1134
1135         /* NO wmediumd detected, perfect medium simulation */
1136         ack = mac80211_hwsim_tx_frame_no_nl(hw, skb, channel);
1137
1138         if (ack && skb->len >= 16) {
1139                 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1140                 mac80211_hwsim_monitor_ack(channel, hdr->addr2);
1141         }
1142
1143         ieee80211_tx_info_clear_status(txi);
1144
1145         /* frame was transmitted at most favorable rate at first attempt */
1146         txi->control.rates[0].count = 1;
1147         txi->control.rates[1].idx = -1;
1148
1149         if (!(txi->flags & IEEE80211_TX_CTL_NO_ACK) && ack)
1150                 txi->flags |= IEEE80211_TX_STAT_ACK;
1151         ieee80211_tx_status_irqsafe(hw, skb);
1152 }
1153
1154
1155 static int mac80211_hwsim_start(struct ieee80211_hw *hw)
1156 {
1157         struct mac80211_hwsim_data *data = hw->priv;
1158         wiphy_debug(hw->wiphy, "%s\n", __func__);
1159         data->started = true;
1160         return 0;
1161 }
1162
1163
1164 static void mac80211_hwsim_stop(struct ieee80211_hw *hw)
1165 {
1166         struct mac80211_hwsim_data *data = hw->priv;
1167         data->started = false;
1168         tasklet_hrtimer_cancel(&data->beacon_timer);
1169         wiphy_debug(hw->wiphy, "%s\n", __func__);
1170 }
1171
1172
1173 static int mac80211_hwsim_add_interface(struct ieee80211_hw *hw,
1174                                         struct ieee80211_vif *vif)
1175 {
1176         wiphy_debug(hw->wiphy, "%s (type=%d mac_addr=%pM)\n",
1177                     __func__, ieee80211_vif_type_p2p(vif),
1178                     vif->addr);
1179         hwsim_set_magic(vif);
1180
1181         vif->cab_queue = 0;
1182         vif->hw_queue[IEEE80211_AC_VO] = 0;
1183         vif->hw_queue[IEEE80211_AC_VI] = 1;
1184         vif->hw_queue[IEEE80211_AC_BE] = 2;
1185         vif->hw_queue[IEEE80211_AC_BK] = 3;
1186
1187         return 0;
1188 }
1189
1190
1191 static int mac80211_hwsim_change_interface(struct ieee80211_hw *hw,
1192                                            struct ieee80211_vif *vif,
1193                                            enum nl80211_iftype newtype,
1194                                            bool newp2p)
1195 {
1196         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1197         wiphy_debug(hw->wiphy,
1198                     "%s (old type=%d, new type=%d, mac_addr=%pM)\n",
1199                     __func__, ieee80211_vif_type_p2p(vif),
1200                     newtype, vif->addr);
1201         hwsim_check_magic(vif);
1202
1203         /*
1204          * interface may change from non-AP to AP in
1205          * which case this needs to be set up again
1206          */
1207         vif->cab_queue = 0;
1208
1209         return 0;
1210 }
1211
1212 static void mac80211_hwsim_remove_interface(
1213         struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1214 {
1215         wiphy_debug(hw->wiphy, "%s (type=%d mac_addr=%pM)\n",
1216                     __func__, ieee80211_vif_type_p2p(vif),
1217                     vif->addr);
1218         hwsim_check_magic(vif);
1219         hwsim_clear_magic(vif);
1220 }
1221
1222 static void mac80211_hwsim_tx_frame(struct ieee80211_hw *hw,
1223                                     struct sk_buff *skb,
1224                                     struct ieee80211_channel *chan)
1225 {
1226         u32 _pid = ACCESS_ONCE(wmediumd_portid);
1227
1228         if (hw->flags & IEEE80211_HW_SUPPORTS_RC_TABLE) {
1229                 struct ieee80211_tx_info *txi = IEEE80211_SKB_CB(skb);
1230                 ieee80211_get_tx_rates(txi->control.vif, NULL, skb,
1231                                        txi->control.rates,
1232                                        ARRAY_SIZE(txi->control.rates));
1233         }
1234
1235         mac80211_hwsim_monitor_rx(hw, skb, chan);
1236
1237         if (_pid)
1238                 return mac80211_hwsim_tx_frame_nl(hw, skb, _pid);
1239
1240         mac80211_hwsim_tx_frame_no_nl(hw, skb, chan);
1241         dev_kfree_skb(skb);
1242 }
1243
1244 static void mac80211_hwsim_beacon_tx(void *arg, u8 *mac,
1245                                      struct ieee80211_vif *vif)
1246 {
1247         struct mac80211_hwsim_data *data = arg;
1248         struct ieee80211_hw *hw = data->hw;
1249         struct ieee80211_tx_info *info;
1250         struct ieee80211_rate *txrate;
1251         struct ieee80211_mgmt *mgmt;
1252         struct sk_buff *skb;
1253
1254         hwsim_check_magic(vif);
1255
1256         if (vif->type != NL80211_IFTYPE_AP &&
1257             vif->type != NL80211_IFTYPE_MESH_POINT &&
1258             vif->type != NL80211_IFTYPE_ADHOC)
1259                 return;
1260
1261         skb = ieee80211_beacon_get(hw, vif);
1262         if (skb == NULL)
1263                 return;
1264         info = IEEE80211_SKB_CB(skb);
1265         if (hw->flags & IEEE80211_HW_SUPPORTS_RC_TABLE)
1266                 ieee80211_get_tx_rates(vif, NULL, skb,
1267                                        info->control.rates,
1268                                        ARRAY_SIZE(info->control.rates));
1269
1270         txrate = ieee80211_get_tx_rate(hw, info);
1271
1272         mgmt = (struct ieee80211_mgmt *) skb->data;
1273         /* fake header transmission time */
1274         data->abs_bcn_ts = mac80211_hwsim_get_tsf_raw();
1275         mgmt->u.beacon.timestamp = cpu_to_le64(data->abs_bcn_ts +
1276                                                data->tsf_offset +
1277                                                24 * 8 * 10 / txrate->bitrate);
1278
1279         mac80211_hwsim_tx_frame(hw, skb,
1280                                 rcu_dereference(vif->chanctx_conf)->def.chan);
1281
1282         if (vif->csa_active && ieee80211_csa_is_complete(vif))
1283                 ieee80211_csa_finish(vif);
1284 }
1285
1286 static enum hrtimer_restart
1287 mac80211_hwsim_beacon(struct hrtimer *timer)
1288 {
1289         struct mac80211_hwsim_data *data =
1290                 container_of(timer, struct mac80211_hwsim_data,
1291                              beacon_timer.timer);
1292         struct ieee80211_hw *hw = data->hw;
1293         u64 bcn_int = data->beacon_int;
1294         ktime_t next_bcn;
1295
1296         if (!data->started)
1297                 goto out;
1298
1299         ieee80211_iterate_active_interfaces_atomic(
1300                 hw, IEEE80211_IFACE_ITER_NORMAL,
1301                 mac80211_hwsim_beacon_tx, data);
1302
1303         /* beacon at new TBTT + beacon interval */
1304         if (data->bcn_delta) {
1305                 bcn_int -= data->bcn_delta;
1306                 data->bcn_delta = 0;
1307         }
1308
1309         next_bcn = ktime_add(hrtimer_get_expires(timer),
1310                              ns_to_ktime(bcn_int * 1000));
1311         tasklet_hrtimer_start(&data->beacon_timer, next_bcn, HRTIMER_MODE_ABS);
1312 out:
1313         return HRTIMER_NORESTART;
1314 }
1315
1316 static const char * const hwsim_chanwidths[] = {
1317         [NL80211_CHAN_WIDTH_20_NOHT] = "noht",
1318         [NL80211_CHAN_WIDTH_20] = "ht20",
1319         [NL80211_CHAN_WIDTH_40] = "ht40",
1320         [NL80211_CHAN_WIDTH_80] = "vht80",
1321         [NL80211_CHAN_WIDTH_80P80] = "vht80p80",
1322         [NL80211_CHAN_WIDTH_160] = "vht160",
1323 };
1324
1325 static int mac80211_hwsim_config(struct ieee80211_hw *hw, u32 changed)
1326 {
1327         struct mac80211_hwsim_data *data = hw->priv;
1328         struct ieee80211_conf *conf = &hw->conf;
1329         static const char *smps_modes[IEEE80211_SMPS_NUM_MODES] = {
1330                 [IEEE80211_SMPS_AUTOMATIC] = "auto",
1331                 [IEEE80211_SMPS_OFF] = "off",
1332                 [IEEE80211_SMPS_STATIC] = "static",
1333                 [IEEE80211_SMPS_DYNAMIC] = "dynamic",
1334         };
1335
1336         if (conf->chandef.chan)
1337                 wiphy_debug(hw->wiphy,
1338                             "%s (freq=%d(%d - %d)/%s idle=%d ps=%d smps=%s)\n",
1339                             __func__,
1340                             conf->chandef.chan->center_freq,
1341                             conf->chandef.center_freq1,
1342                             conf->chandef.center_freq2,
1343                             hwsim_chanwidths[conf->chandef.width],
1344                             !!(conf->flags & IEEE80211_CONF_IDLE),
1345                             !!(conf->flags & IEEE80211_CONF_PS),
1346                             smps_modes[conf->smps_mode]);
1347         else
1348                 wiphy_debug(hw->wiphy,
1349                             "%s (freq=0 idle=%d ps=%d smps=%s)\n",
1350                             __func__,
1351                             !!(conf->flags & IEEE80211_CONF_IDLE),
1352                             !!(conf->flags & IEEE80211_CONF_PS),
1353                             smps_modes[conf->smps_mode]);
1354
1355         data->idle = !!(conf->flags & IEEE80211_CONF_IDLE);
1356
1357         data->channel = conf->chandef.chan;
1358
1359         WARN_ON(data->channel && data->use_chanctx);
1360
1361         data->power_level = conf->power_level;
1362         if (!data->started || !data->beacon_int)
1363                 tasklet_hrtimer_cancel(&data->beacon_timer);
1364         else if (!hrtimer_is_queued(&data->beacon_timer.timer)) {
1365                 u64 tsf = mac80211_hwsim_get_tsf(hw, NULL);
1366                 u32 bcn_int = data->beacon_int;
1367                 u64 until_tbtt = bcn_int - do_div(tsf, bcn_int);
1368
1369                 tasklet_hrtimer_start(&data->beacon_timer,
1370                                       ns_to_ktime(until_tbtt * 1000),
1371                                       HRTIMER_MODE_REL);
1372         }
1373
1374         return 0;
1375 }
1376
1377
1378 static void mac80211_hwsim_configure_filter(struct ieee80211_hw *hw,
1379                                             unsigned int changed_flags,
1380                                             unsigned int *total_flags,u64 multicast)
1381 {
1382         struct mac80211_hwsim_data *data = hw->priv;
1383
1384         wiphy_debug(hw->wiphy, "%s\n", __func__);
1385
1386         data->rx_filter = 0;
1387         if (*total_flags & FIF_PROMISC_IN_BSS)
1388                 data->rx_filter |= FIF_PROMISC_IN_BSS;
1389         if (*total_flags & FIF_ALLMULTI)
1390                 data->rx_filter |= FIF_ALLMULTI;
1391
1392         *total_flags = data->rx_filter;
1393 }
1394
1395 static void mac80211_hwsim_bcn_en_iter(void *data, u8 *mac,
1396                                        struct ieee80211_vif *vif)
1397 {
1398         unsigned int *count = data;
1399         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
1400
1401         if (vp->bcn_en)
1402                 (*count)++;
1403 }
1404
1405 static void mac80211_hwsim_bss_info_changed(struct ieee80211_hw *hw,
1406                                             struct ieee80211_vif *vif,
1407                                             struct ieee80211_bss_conf *info,
1408                                             u32 changed)
1409 {
1410         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
1411         struct mac80211_hwsim_data *data = hw->priv;
1412
1413         hwsim_check_magic(vif);
1414
1415         wiphy_debug(hw->wiphy, "%s(changed=0x%x vif->addr=%pM)\n",
1416                     __func__, changed, vif->addr);
1417
1418         if (changed & BSS_CHANGED_BSSID) {
1419                 wiphy_debug(hw->wiphy, "%s: BSSID changed: %pM\n",
1420                             __func__, info->bssid);
1421                 memcpy(vp->bssid, info->bssid, ETH_ALEN);
1422         }
1423
1424         if (changed & BSS_CHANGED_ASSOC) {
1425                 wiphy_debug(hw->wiphy, "  ASSOC: assoc=%d aid=%d\n",
1426                             info->assoc, info->aid);
1427                 vp->assoc = info->assoc;
1428                 vp->aid = info->aid;
1429         }
1430
1431         if (changed & BSS_CHANGED_BEACON_INT) {
1432                 wiphy_debug(hw->wiphy, "  BCNINT: %d\n", info->beacon_int);
1433                 data->beacon_int = info->beacon_int * 1024;
1434         }
1435
1436         if (changed & BSS_CHANGED_BEACON_ENABLED) {
1437                 wiphy_debug(hw->wiphy, "  BCN EN: %d\n", info->enable_beacon);
1438                 vp->bcn_en = info->enable_beacon;
1439                 if (data->started &&
1440                     !hrtimer_is_queued(&data->beacon_timer.timer) &&
1441                     info->enable_beacon) {
1442                         u64 tsf, until_tbtt;
1443                         u32 bcn_int;
1444                         if (WARN_ON(!data->beacon_int))
1445                                 data->beacon_int = 1000 * 1024;
1446                         tsf = mac80211_hwsim_get_tsf(hw, vif);
1447                         bcn_int = data->beacon_int;
1448                         until_tbtt = bcn_int - do_div(tsf, bcn_int);
1449                         tasklet_hrtimer_start(&data->beacon_timer,
1450                                               ns_to_ktime(until_tbtt * 1000),
1451                                               HRTIMER_MODE_REL);
1452                 } else if (!info->enable_beacon) {
1453                         unsigned int count = 0;
1454                         ieee80211_iterate_active_interfaces_atomic(
1455                                 data->hw, IEEE80211_IFACE_ITER_NORMAL,
1456                                 mac80211_hwsim_bcn_en_iter, &count);
1457                         wiphy_debug(hw->wiphy, "  beaconing vifs remaining: %u",
1458                                     count);
1459                         if (count == 0)
1460                                 tasklet_hrtimer_cancel(&data->beacon_timer);
1461                 }
1462         }
1463
1464         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1465                 wiphy_debug(hw->wiphy, "  ERP_CTS_PROT: %d\n",
1466                             info->use_cts_prot);
1467         }
1468
1469         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1470                 wiphy_debug(hw->wiphy, "  ERP_PREAMBLE: %d\n",
1471                             info->use_short_preamble);
1472         }
1473
1474         if (changed & BSS_CHANGED_ERP_SLOT) {
1475                 wiphy_debug(hw->wiphy, "  ERP_SLOT: %d\n", info->use_short_slot);
1476         }
1477
1478         if (changed & BSS_CHANGED_HT) {
1479                 wiphy_debug(hw->wiphy, "  HT: op_mode=0x%x\n",
1480                             info->ht_operation_mode);
1481         }
1482
1483         if (changed & BSS_CHANGED_BASIC_RATES) {
1484                 wiphy_debug(hw->wiphy, "  BASIC_RATES: 0x%llx\n",
1485                             (unsigned long long) info->basic_rates);
1486         }
1487
1488         if (changed & BSS_CHANGED_TXPOWER)
1489                 wiphy_debug(hw->wiphy, "  TX Power: %d dBm\n", info->txpower);
1490 }
1491
1492 static int mac80211_hwsim_sta_add(struct ieee80211_hw *hw,
1493                                   struct ieee80211_vif *vif,
1494                                   struct ieee80211_sta *sta)
1495 {
1496         hwsim_check_magic(vif);
1497         hwsim_set_sta_magic(sta);
1498
1499         return 0;
1500 }
1501
1502 static int mac80211_hwsim_sta_remove(struct ieee80211_hw *hw,
1503                                      struct ieee80211_vif *vif,
1504                                      struct ieee80211_sta *sta)
1505 {
1506         hwsim_check_magic(vif);
1507         hwsim_clear_sta_magic(sta);
1508
1509         return 0;
1510 }
1511
1512 static void mac80211_hwsim_sta_notify(struct ieee80211_hw *hw,
1513                                       struct ieee80211_vif *vif,
1514                                       enum sta_notify_cmd cmd,
1515                                       struct ieee80211_sta *sta)
1516 {
1517         hwsim_check_magic(vif);
1518
1519         switch (cmd) {
1520         case STA_NOTIFY_SLEEP:
1521         case STA_NOTIFY_AWAKE:
1522                 /* TODO: make good use of these flags */
1523                 break;
1524         default:
1525                 WARN(1, "Invalid sta notify: %d\n", cmd);
1526                 break;
1527         }
1528 }
1529
1530 static int mac80211_hwsim_set_tim(struct ieee80211_hw *hw,
1531                                   struct ieee80211_sta *sta,
1532                                   bool set)
1533 {
1534         hwsim_check_sta_magic(sta);
1535         return 0;
1536 }
1537
1538 static int mac80211_hwsim_conf_tx(
1539         struct ieee80211_hw *hw,
1540         struct ieee80211_vif *vif, u16 queue,
1541         const struct ieee80211_tx_queue_params *params)
1542 {
1543         wiphy_debug(hw->wiphy,
1544                     "%s (queue=%d txop=%d cw_min=%d cw_max=%d aifs=%d)\n",
1545                     __func__, queue,
1546                     params->txop, params->cw_min,
1547                     params->cw_max, params->aifs);
1548         return 0;
1549 }
1550
1551 static int mac80211_hwsim_get_survey(
1552         struct ieee80211_hw *hw, int idx,
1553         struct survey_info *survey)
1554 {
1555         struct ieee80211_conf *conf = &hw->conf;
1556
1557         wiphy_debug(hw->wiphy, "%s (idx=%d)\n", __func__, idx);
1558
1559         if (idx != 0)
1560                 return -ENOENT;
1561
1562         /* Current channel */
1563         survey->channel = conf->chandef.chan;
1564
1565         /*
1566          * Magically conjured noise level --- this is only ok for simulated hardware.
1567          *
1568          * A real driver which cannot determine the real channel noise MUST NOT
1569          * report any noise, especially not a magically conjured one :-)
1570          */
1571         survey->filled = SURVEY_INFO_NOISE_DBM;
1572         survey->noise = -92;
1573
1574         return 0;
1575 }
1576
1577 #ifdef CONFIG_NL80211_TESTMODE
1578 /*
1579  * This section contains example code for using netlink
1580  * attributes with the testmode command in nl80211.
1581  */
1582
1583 /* These enums need to be kept in sync with userspace */
1584 enum hwsim_testmode_attr {
1585         __HWSIM_TM_ATTR_INVALID = 0,
1586         HWSIM_TM_ATTR_CMD       = 1,
1587         HWSIM_TM_ATTR_PS        = 2,
1588
1589         /* keep last */
1590         __HWSIM_TM_ATTR_AFTER_LAST,
1591         HWSIM_TM_ATTR_MAX       = __HWSIM_TM_ATTR_AFTER_LAST - 1
1592 };
1593
1594 enum hwsim_testmode_cmd {
1595         HWSIM_TM_CMD_SET_PS             = 0,
1596         HWSIM_TM_CMD_GET_PS             = 1,
1597         HWSIM_TM_CMD_STOP_QUEUES        = 2,
1598         HWSIM_TM_CMD_WAKE_QUEUES        = 3,
1599 };
1600
1601 static const struct nla_policy hwsim_testmode_policy[HWSIM_TM_ATTR_MAX + 1] = {
1602         [HWSIM_TM_ATTR_CMD] = { .type = NLA_U32 },
1603         [HWSIM_TM_ATTR_PS] = { .type = NLA_U32 },
1604 };
1605
1606 static int mac80211_hwsim_testmode_cmd(struct ieee80211_hw *hw,
1607                                        struct ieee80211_vif *vif,
1608                                        void *data, int len)
1609 {
1610         struct mac80211_hwsim_data *hwsim = hw->priv;
1611         struct nlattr *tb[HWSIM_TM_ATTR_MAX + 1];
1612         struct sk_buff *skb;
1613         int err, ps;
1614
1615         err = nla_parse(tb, HWSIM_TM_ATTR_MAX, data, len,
1616                         hwsim_testmode_policy);
1617         if (err)
1618                 return err;
1619
1620         if (!tb[HWSIM_TM_ATTR_CMD])
1621                 return -EINVAL;
1622
1623         switch (nla_get_u32(tb[HWSIM_TM_ATTR_CMD])) {
1624         case HWSIM_TM_CMD_SET_PS:
1625                 if (!tb[HWSIM_TM_ATTR_PS])
1626                         return -EINVAL;
1627                 ps = nla_get_u32(tb[HWSIM_TM_ATTR_PS]);
1628                 return hwsim_fops_ps_write(hwsim, ps);
1629         case HWSIM_TM_CMD_GET_PS:
1630                 skb = cfg80211_testmode_alloc_reply_skb(hw->wiphy,
1631                                                 nla_total_size(sizeof(u32)));
1632                 if (!skb)
1633                         return -ENOMEM;
1634                 if (nla_put_u32(skb, HWSIM_TM_ATTR_PS, hwsim->ps))
1635                         goto nla_put_failure;
1636                 return cfg80211_testmode_reply(skb);
1637         case HWSIM_TM_CMD_STOP_QUEUES:
1638                 ieee80211_stop_queues(hw);
1639                 return 0;
1640         case HWSIM_TM_CMD_WAKE_QUEUES:
1641                 ieee80211_wake_queues(hw);
1642                 return 0;
1643         default:
1644                 return -EOPNOTSUPP;
1645         }
1646
1647  nla_put_failure:
1648         kfree_skb(skb);
1649         return -ENOBUFS;
1650 }
1651 #endif
1652
1653 static int mac80211_hwsim_ampdu_action(struct ieee80211_hw *hw,
1654                                        struct ieee80211_vif *vif,
1655                                        enum ieee80211_ampdu_mlme_action action,
1656                                        struct ieee80211_sta *sta, u16 tid, u16 *ssn,
1657                                        u8 buf_size)
1658 {
1659         switch (action) {
1660         case IEEE80211_AMPDU_TX_START:
1661                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1662                 break;
1663         case IEEE80211_AMPDU_TX_STOP_CONT:
1664         case IEEE80211_AMPDU_TX_STOP_FLUSH:
1665         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
1666                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1667                 break;
1668         case IEEE80211_AMPDU_TX_OPERATIONAL:
1669                 break;
1670         case IEEE80211_AMPDU_RX_START:
1671         case IEEE80211_AMPDU_RX_STOP:
1672                 break;
1673         default:
1674                 return -EOPNOTSUPP;
1675         }
1676
1677         return 0;
1678 }
1679
1680 static void mac80211_hwsim_flush(struct ieee80211_hw *hw,
1681                                  struct ieee80211_vif *vif,
1682                                  u32 queues, bool drop)
1683 {
1684         /* Not implemented, queues only on kernel side */
1685 }
1686
1687 static void hw_scan_work(struct work_struct *work)
1688 {
1689         struct mac80211_hwsim_data *hwsim =
1690                 container_of(work, struct mac80211_hwsim_data, hw_scan.work);
1691         struct cfg80211_scan_request *req = hwsim->hw_scan_request;
1692         int dwell, i;
1693
1694         mutex_lock(&hwsim->mutex);
1695         if (hwsim->scan_chan_idx >= req->n_channels) {
1696                 wiphy_debug(hwsim->hw->wiphy, "hw scan complete\n");
1697                 ieee80211_scan_completed(hwsim->hw, false);
1698                 hwsim->hw_scan_request = NULL;
1699                 hwsim->hw_scan_vif = NULL;
1700                 hwsim->tmp_chan = NULL;
1701                 mutex_unlock(&hwsim->mutex);
1702                 return;
1703         }
1704
1705         wiphy_debug(hwsim->hw->wiphy, "hw scan %d MHz\n",
1706                     req->channels[hwsim->scan_chan_idx]->center_freq);
1707
1708         hwsim->tmp_chan = req->channels[hwsim->scan_chan_idx];
1709         if (hwsim->tmp_chan->flags & IEEE80211_CHAN_NO_IR ||
1710             !req->n_ssids) {
1711                 dwell = 120;
1712         } else {
1713                 dwell = 30;
1714                 /* send probes */
1715                 for (i = 0; i < req->n_ssids; i++) {
1716                         struct sk_buff *probe;
1717
1718                         probe = ieee80211_probereq_get(hwsim->hw,
1719                                                        hwsim->hw_scan_vif,
1720                                                        req->ssids[i].ssid,
1721                                                        req->ssids[i].ssid_len,
1722                                                        req->ie_len);
1723                         if (!probe)
1724                                 continue;
1725
1726                         if (req->ie_len)
1727                                 memcpy(skb_put(probe, req->ie_len), req->ie,
1728                                        req->ie_len);
1729
1730                         local_bh_disable();
1731                         mac80211_hwsim_tx_frame(hwsim->hw, probe,
1732                                                 hwsim->tmp_chan);
1733                         local_bh_enable();
1734                 }
1735         }
1736         ieee80211_queue_delayed_work(hwsim->hw, &hwsim->hw_scan,
1737                                      msecs_to_jiffies(dwell));
1738         hwsim->scan_chan_idx++;
1739         mutex_unlock(&hwsim->mutex);
1740 }
1741
1742 static int mac80211_hwsim_hw_scan(struct ieee80211_hw *hw,
1743                                   struct ieee80211_vif *vif,
1744                                   struct ieee80211_scan_request *hw_req)
1745 {
1746         struct mac80211_hwsim_data *hwsim = hw->priv;
1747         struct cfg80211_scan_request *req = &hw_req->req;
1748
1749         mutex_lock(&hwsim->mutex);
1750         if (WARN_ON(hwsim->tmp_chan || hwsim->hw_scan_request)) {
1751                 mutex_unlock(&hwsim->mutex);
1752                 return -EBUSY;
1753         }
1754         hwsim->hw_scan_request = req;
1755         hwsim->hw_scan_vif = vif;
1756         hwsim->scan_chan_idx = 0;
1757         mutex_unlock(&hwsim->mutex);
1758
1759         wiphy_debug(hw->wiphy, "hwsim hw_scan request\n");
1760
1761         ieee80211_queue_delayed_work(hwsim->hw, &hwsim->hw_scan, 0);
1762
1763         return 0;
1764 }
1765
1766 static void mac80211_hwsim_cancel_hw_scan(struct ieee80211_hw *hw,
1767                                           struct ieee80211_vif *vif)
1768 {
1769         struct mac80211_hwsim_data *hwsim = hw->priv;
1770
1771         wiphy_debug(hw->wiphy, "hwsim cancel_hw_scan\n");
1772
1773         cancel_delayed_work_sync(&hwsim->hw_scan);
1774
1775         mutex_lock(&hwsim->mutex);
1776         ieee80211_scan_completed(hwsim->hw, true);
1777         hwsim->tmp_chan = NULL;
1778         hwsim->hw_scan_request = NULL;
1779         hwsim->hw_scan_vif = NULL;
1780         mutex_unlock(&hwsim->mutex);
1781 }
1782
1783 static void mac80211_hwsim_sw_scan(struct ieee80211_hw *hw)
1784 {
1785         struct mac80211_hwsim_data *hwsim = hw->priv;
1786
1787         mutex_lock(&hwsim->mutex);
1788
1789         if (hwsim->scanning) {
1790                 printk(KERN_DEBUG "two hwsim sw_scans detected!\n");
1791                 goto out;
1792         }
1793
1794         printk(KERN_DEBUG "hwsim sw_scan request, prepping stuff\n");
1795         hwsim->scanning = true;
1796
1797 out:
1798         mutex_unlock(&hwsim->mutex);
1799 }
1800
1801 static void mac80211_hwsim_sw_scan_complete(struct ieee80211_hw *hw)
1802 {
1803         struct mac80211_hwsim_data *hwsim = hw->priv;
1804
1805         mutex_lock(&hwsim->mutex);
1806
1807         printk(KERN_DEBUG "hwsim sw_scan_complete\n");
1808         hwsim->scanning = false;
1809
1810         mutex_unlock(&hwsim->mutex);
1811 }
1812
1813 static void hw_roc_done(struct work_struct *work)
1814 {
1815         struct mac80211_hwsim_data *hwsim =
1816                 container_of(work, struct mac80211_hwsim_data, roc_done.work);
1817
1818         mutex_lock(&hwsim->mutex);
1819         ieee80211_remain_on_channel_expired(hwsim->hw);
1820         hwsim->tmp_chan = NULL;
1821         mutex_unlock(&hwsim->mutex);
1822
1823         wiphy_debug(hwsim->hw->wiphy, "hwsim ROC expired\n");
1824 }
1825
1826 static int mac80211_hwsim_roc(struct ieee80211_hw *hw,
1827                               struct ieee80211_vif *vif,
1828                               struct ieee80211_channel *chan,
1829                               int duration,
1830                               enum ieee80211_roc_type type)
1831 {
1832         struct mac80211_hwsim_data *hwsim = hw->priv;
1833
1834         mutex_lock(&hwsim->mutex);
1835         if (WARN_ON(hwsim->tmp_chan || hwsim->hw_scan_request)) {
1836                 mutex_unlock(&hwsim->mutex);
1837                 return -EBUSY;
1838         }
1839
1840         hwsim->tmp_chan = chan;
1841         mutex_unlock(&hwsim->mutex);
1842
1843         wiphy_debug(hw->wiphy, "hwsim ROC (%d MHz, %d ms)\n",
1844                     chan->center_freq, duration);
1845
1846         ieee80211_ready_on_channel(hw);
1847
1848         ieee80211_queue_delayed_work(hw, &hwsim->roc_done,
1849                                      msecs_to_jiffies(duration));
1850         return 0;
1851 }
1852
1853 static int mac80211_hwsim_croc(struct ieee80211_hw *hw)
1854 {
1855         struct mac80211_hwsim_data *hwsim = hw->priv;
1856
1857         cancel_delayed_work_sync(&hwsim->roc_done);
1858
1859         mutex_lock(&hwsim->mutex);
1860         hwsim->tmp_chan = NULL;
1861         mutex_unlock(&hwsim->mutex);
1862
1863         wiphy_debug(hw->wiphy, "hwsim ROC canceled\n");
1864
1865         return 0;
1866 }
1867
1868 static int mac80211_hwsim_add_chanctx(struct ieee80211_hw *hw,
1869                                       struct ieee80211_chanctx_conf *ctx)
1870 {
1871         hwsim_set_chanctx_magic(ctx);
1872         wiphy_debug(hw->wiphy,
1873                     "add channel context control: %d MHz/width: %d/cfreqs:%d/%d MHz\n",
1874                     ctx->def.chan->center_freq, ctx->def.width,
1875                     ctx->def.center_freq1, ctx->def.center_freq2);
1876         return 0;
1877 }
1878
1879 static void mac80211_hwsim_remove_chanctx(struct ieee80211_hw *hw,
1880                                           struct ieee80211_chanctx_conf *ctx)
1881 {
1882         wiphy_debug(hw->wiphy,
1883                     "remove channel context control: %d MHz/width: %d/cfreqs:%d/%d MHz\n",
1884                     ctx->def.chan->center_freq, ctx->def.width,
1885                     ctx->def.center_freq1, ctx->def.center_freq2);
1886         hwsim_check_chanctx_magic(ctx);
1887         hwsim_clear_chanctx_magic(ctx);
1888 }
1889
1890 static void mac80211_hwsim_change_chanctx(struct ieee80211_hw *hw,
1891                                           struct ieee80211_chanctx_conf *ctx,
1892                                           u32 changed)
1893 {
1894         hwsim_check_chanctx_magic(ctx);
1895         wiphy_debug(hw->wiphy,
1896                     "change channel context control: %d MHz/width: %d/cfreqs:%d/%d MHz\n",
1897                     ctx->def.chan->center_freq, ctx->def.width,
1898                     ctx->def.center_freq1, ctx->def.center_freq2);
1899 }
1900
1901 static int mac80211_hwsim_assign_vif_chanctx(struct ieee80211_hw *hw,
1902                                              struct ieee80211_vif *vif,
1903                                              struct ieee80211_chanctx_conf *ctx)
1904 {
1905         hwsim_check_magic(vif);
1906         hwsim_check_chanctx_magic(ctx);
1907
1908         return 0;
1909 }
1910
1911 static void mac80211_hwsim_unassign_vif_chanctx(struct ieee80211_hw *hw,
1912                                                 struct ieee80211_vif *vif,
1913                                                 struct ieee80211_chanctx_conf *ctx)
1914 {
1915         hwsim_check_magic(vif);
1916         hwsim_check_chanctx_magic(ctx);
1917 }
1918
1919 static const struct ieee80211_ops mac80211_hwsim_ops = {
1920         .tx = mac80211_hwsim_tx,
1921         .start = mac80211_hwsim_start,
1922         .stop = mac80211_hwsim_stop,
1923         .add_interface = mac80211_hwsim_add_interface,
1924         .change_interface = mac80211_hwsim_change_interface,
1925         .remove_interface = mac80211_hwsim_remove_interface,
1926         .config = mac80211_hwsim_config,
1927         .configure_filter = mac80211_hwsim_configure_filter,
1928         .bss_info_changed = mac80211_hwsim_bss_info_changed,
1929         .sta_add = mac80211_hwsim_sta_add,
1930         .sta_remove = mac80211_hwsim_sta_remove,
1931         .sta_notify = mac80211_hwsim_sta_notify,
1932         .set_tim = mac80211_hwsim_set_tim,
1933         .conf_tx = mac80211_hwsim_conf_tx,
1934         .get_survey = mac80211_hwsim_get_survey,
1935         CFG80211_TESTMODE_CMD(mac80211_hwsim_testmode_cmd)
1936         .ampdu_action = mac80211_hwsim_ampdu_action,
1937         .sw_scan_start = mac80211_hwsim_sw_scan,
1938         .sw_scan_complete = mac80211_hwsim_sw_scan_complete,
1939         .flush = mac80211_hwsim_flush,
1940         .get_tsf = mac80211_hwsim_get_tsf,
1941         .set_tsf = mac80211_hwsim_set_tsf,
1942 };
1943
1944 static struct ieee80211_ops mac80211_hwsim_mchan_ops;
1945
1946 static int mac80211_hwsim_create_radio(int channels, const char *reg_alpha2,
1947                                        const struct ieee80211_regdomain *regd,
1948                                        bool reg_strict, bool p2p_device,
1949                                        bool use_chanctx)
1950 {
1951         int err;
1952         u8 addr[ETH_ALEN];
1953         struct mac80211_hwsim_data *data;
1954         struct ieee80211_hw *hw;
1955         enum ieee80211_band band;
1956         const struct ieee80211_ops *ops = &mac80211_hwsim_ops;
1957         int idx;
1958
1959         if (WARN_ON(channels > 1 && !use_chanctx))
1960                 return -EINVAL;
1961
1962         spin_lock_bh(&hwsim_radio_lock);
1963         idx = hwsim_radio_idx++;
1964         spin_unlock_bh(&hwsim_radio_lock);
1965
1966         if (use_chanctx)
1967                 ops = &mac80211_hwsim_mchan_ops;
1968         hw = ieee80211_alloc_hw(sizeof(*data), ops);
1969         if (!hw) {
1970                 printk(KERN_DEBUG "mac80211_hwsim: ieee80211_alloc_hw failed\n");
1971                 err = -ENOMEM;
1972                 goto failed;
1973         }
1974         data = hw->priv;
1975         data->hw = hw;
1976
1977         data->dev = device_create(hwsim_class, NULL, 0, hw, "hwsim%d", idx);
1978         if (IS_ERR(data->dev)) {
1979                 printk(KERN_DEBUG
1980                        "mac80211_hwsim: device_create failed (%ld)\n",
1981                        PTR_ERR(data->dev));
1982                 err = -ENOMEM;
1983                 goto failed_drvdata;
1984         }
1985         data->dev->driver = &mac80211_hwsim_driver.driver;
1986         err = device_bind_driver(data->dev);
1987         if (err != 0) {
1988                 printk(KERN_DEBUG "mac80211_hwsim: device_bind_driver failed (%d)\n",
1989                        err);
1990                 goto failed_hw;
1991         }
1992
1993         skb_queue_head_init(&data->pending);
1994
1995         SET_IEEE80211_DEV(hw, data->dev);
1996         memset(addr, 0, ETH_ALEN);
1997         addr[0] = 0x02;
1998         addr[3] = idx >> 8;
1999         addr[4] = idx;
2000         memcpy(data->addresses[0].addr, addr, ETH_ALEN);
2001         memcpy(data->addresses[1].addr, addr, ETH_ALEN);
2002         data->addresses[1].addr[0] |= 0x40;
2003         hw->wiphy->n_addresses = 2;
2004         hw->wiphy->addresses = data->addresses;
2005
2006         data->channels = channels;
2007         data->use_chanctx = use_chanctx;
2008         data->idx = idx;
2009
2010         if (data->use_chanctx) {
2011                 hw->wiphy->max_scan_ssids = 255;
2012                 hw->wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
2013                 hw->wiphy->max_remain_on_channel_duration = 1000;
2014                 /* For channels > 1 DFS is not allowed */
2015                 hw->wiphy->n_iface_combinations = 1;
2016                 hw->wiphy->iface_combinations = &data->if_combination;
2017                 if (p2p_device)
2018                         data->if_combination = hwsim_if_comb_p2p_dev[0];
2019                 else
2020                         data->if_combination = hwsim_if_comb[0];
2021                 data->if_combination.num_different_channels = data->channels;
2022         } else if (p2p_device) {
2023                 hw->wiphy->iface_combinations = hwsim_if_comb_p2p_dev;
2024                 hw->wiphy->n_iface_combinations =
2025                         ARRAY_SIZE(hwsim_if_comb_p2p_dev);
2026         } else {
2027                 hw->wiphy->iface_combinations = hwsim_if_comb;
2028                 hw->wiphy->n_iface_combinations = ARRAY_SIZE(hwsim_if_comb);
2029         }
2030
2031         INIT_DELAYED_WORK(&data->roc_done, hw_roc_done);
2032         INIT_DELAYED_WORK(&data->hw_scan, hw_scan_work);
2033
2034         hw->queues = 5;
2035         hw->offchannel_tx_hw_queue = 4;
2036         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
2037                                      BIT(NL80211_IFTYPE_AP) |
2038                                      BIT(NL80211_IFTYPE_P2P_CLIENT) |
2039                                      BIT(NL80211_IFTYPE_P2P_GO) |
2040                                      BIT(NL80211_IFTYPE_ADHOC) |
2041                                      BIT(NL80211_IFTYPE_MESH_POINT);
2042
2043         if (p2p_device)
2044                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_P2P_DEVICE);
2045
2046         hw->flags = IEEE80211_HW_MFP_CAPABLE |
2047                     IEEE80211_HW_SIGNAL_DBM |
2048                     IEEE80211_HW_AMPDU_AGGREGATION |
2049                     IEEE80211_HW_WANT_MONITOR_VIF |
2050                     IEEE80211_HW_QUEUE_CONTROL |
2051                     IEEE80211_HW_SUPPORTS_HT_CCK_RATES |
2052                     IEEE80211_HW_CHANCTX_STA_CSA;
2053         if (rctbl)
2054                 hw->flags |= IEEE80211_HW_SUPPORTS_RC_TABLE;
2055
2056         hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS |
2057                             WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL |
2058                             WIPHY_FLAG_AP_UAPSD |
2059                             WIPHY_FLAG_HAS_CHANNEL_SWITCH;
2060         hw->wiphy->features |= NL80211_FEATURE_ACTIVE_MONITOR |
2061                                NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE |
2062                                NL80211_FEATURE_STATIC_SMPS |
2063                                NL80211_FEATURE_DYNAMIC_SMPS;
2064
2065         /* ask mac80211 to reserve space for magic */
2066         hw->vif_data_size = sizeof(struct hwsim_vif_priv);
2067         hw->sta_data_size = sizeof(struct hwsim_sta_priv);
2068         hw->chanctx_data_size = sizeof(struct hwsim_chanctx_priv);
2069
2070         memcpy(data->channels_2ghz, hwsim_channels_2ghz,
2071                 sizeof(hwsim_channels_2ghz));
2072         memcpy(data->channels_5ghz, hwsim_channels_5ghz,
2073                 sizeof(hwsim_channels_5ghz));
2074         memcpy(data->rates, hwsim_rates, sizeof(hwsim_rates));
2075
2076         for (band = IEEE80211_BAND_2GHZ; band < IEEE80211_NUM_BANDS; band++) {
2077                 struct ieee80211_supported_band *sband = &data->bands[band];
2078                 switch (band) {
2079                 case IEEE80211_BAND_2GHZ:
2080                         sband->channels = data->channels_2ghz;
2081                         sband->n_channels = ARRAY_SIZE(hwsim_channels_2ghz);
2082                         sband->bitrates = data->rates;
2083                         sband->n_bitrates = ARRAY_SIZE(hwsim_rates);
2084                         break;
2085                 case IEEE80211_BAND_5GHZ:
2086                         sband->channels = data->channels_5ghz;
2087                         sband->n_channels = ARRAY_SIZE(hwsim_channels_5ghz);
2088                         sband->bitrates = data->rates + 4;
2089                         sband->n_bitrates = ARRAY_SIZE(hwsim_rates) - 4;
2090                         break;
2091                 default:
2092                         continue;
2093                 }
2094
2095                 sband->ht_cap.ht_supported = true;
2096                 sband->ht_cap.cap = IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
2097                                     IEEE80211_HT_CAP_GRN_FLD |
2098                                     IEEE80211_HT_CAP_SGI_40 |
2099                                     IEEE80211_HT_CAP_DSSSCCK40;
2100                 sband->ht_cap.ampdu_factor = 0x3;
2101                 sband->ht_cap.ampdu_density = 0x6;
2102                 memset(&sband->ht_cap.mcs, 0,
2103                        sizeof(sband->ht_cap.mcs));
2104                 sband->ht_cap.mcs.rx_mask[0] = 0xff;
2105                 sband->ht_cap.mcs.rx_mask[1] = 0xff;
2106                 sband->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
2107
2108                 hw->wiphy->bands[band] = sband;
2109
2110                 sband->vht_cap.vht_supported = true;
2111                 sband->vht_cap.cap =
2112                         IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454 |
2113                         IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ |
2114                         IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ |
2115                         IEEE80211_VHT_CAP_RXLDPC |
2116                         IEEE80211_VHT_CAP_SHORT_GI_80 |
2117                         IEEE80211_VHT_CAP_SHORT_GI_160 |
2118                         IEEE80211_VHT_CAP_TXSTBC |
2119                         IEEE80211_VHT_CAP_RXSTBC_1 |
2120                         IEEE80211_VHT_CAP_RXSTBC_2 |
2121                         IEEE80211_VHT_CAP_RXSTBC_3 |
2122                         IEEE80211_VHT_CAP_RXSTBC_4 |
2123                         IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
2124                 sband->vht_cap.vht_mcs.rx_mcs_map =
2125                         cpu_to_le16(IEEE80211_VHT_MCS_SUPPORT_0_8 << 0 |
2126                                     IEEE80211_VHT_MCS_SUPPORT_0_8 << 2 |
2127                                     IEEE80211_VHT_MCS_SUPPORT_0_9 << 4 |
2128                                     IEEE80211_VHT_MCS_SUPPORT_0_8 << 6 |
2129                                     IEEE80211_VHT_MCS_SUPPORT_0_8 << 8 |
2130                                     IEEE80211_VHT_MCS_SUPPORT_0_9 << 10 |
2131                                     IEEE80211_VHT_MCS_SUPPORT_0_9 << 12 |
2132                                     IEEE80211_VHT_MCS_SUPPORT_0_8 << 14);
2133                 sband->vht_cap.vht_mcs.tx_mcs_map =
2134                         sband->vht_cap.vht_mcs.rx_mcs_map;
2135         }
2136
2137         /* By default all radios belong to the first group */
2138         data->group = 1;
2139         mutex_init(&data->mutex);
2140
2141         /* Enable frame retransmissions for lossy channels */
2142         hw->max_rates = 4;
2143         hw->max_rate_tries = 11;
2144
2145         if (reg_strict)
2146                 hw->wiphy->regulatory_flags |= REGULATORY_STRICT_REG;
2147         if (regd) {
2148                 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG;
2149                 wiphy_apply_custom_regulatory(hw->wiphy, regd);
2150                 /* give the regulatory workqueue a chance to run */
2151                 schedule_timeout_interruptible(1);
2152         }
2153
2154         err = ieee80211_register_hw(hw);
2155         if (err < 0) {
2156                 printk(KERN_DEBUG "mac80211_hwsim: ieee80211_register_hw failed (%d)\n",
2157                        err);
2158                 goto failed_hw;
2159         }
2160
2161         wiphy_debug(hw->wiphy, "hwaddr %pM registered\n", hw->wiphy->perm_addr);
2162
2163         if (reg_alpha2)
2164                 regulatory_hint(hw->wiphy, reg_alpha2);
2165
2166         data->debugfs = debugfs_create_dir("hwsim", hw->wiphy->debugfsdir);
2167         debugfs_create_file("ps", 0666, data->debugfs, data, &hwsim_fops_ps);
2168         debugfs_create_file("group", 0666, data->debugfs, data,
2169                             &hwsim_fops_group);
2170         if (!data->use_chanctx)
2171                 debugfs_create_file("dfs_simulate_radar", 0222,
2172                                     data->debugfs,
2173                                     data, &hwsim_simulate_radar);
2174
2175         tasklet_hrtimer_init(&data->beacon_timer,
2176                              mac80211_hwsim_beacon,
2177                              CLOCK_MONOTONIC_RAW, HRTIMER_MODE_ABS);
2178
2179         spin_lock_bh(&hwsim_radio_lock);
2180         list_add_tail(&data->list, &hwsim_radios);
2181         spin_unlock_bh(&hwsim_radio_lock);
2182
2183         return idx;
2184
2185 failed_hw:
2186         device_unregister(data->dev);
2187 failed_drvdata:
2188         ieee80211_free_hw(hw);
2189 failed:
2190         return err;
2191 }
2192
2193 static void mac80211_hwsim_destroy_radio(struct mac80211_hwsim_data *data)
2194 {
2195         debugfs_remove_recursive(data->debugfs);
2196         ieee80211_unregister_hw(data->hw);
2197         device_release_driver(data->dev);
2198         device_unregister(data->dev);
2199         ieee80211_free_hw(data->hw);
2200 }
2201
2202 static void mac80211_hwsim_free(void)
2203 {
2204         struct mac80211_hwsim_data *data;
2205
2206         spin_lock_bh(&hwsim_radio_lock);
2207         while ((data = list_first_entry_or_null(&hwsim_radios,
2208                                                 struct mac80211_hwsim_data,
2209                                                 list))) {
2210                 list_del(&data->list);
2211                 spin_unlock_bh(&hwsim_radio_lock);
2212                 mac80211_hwsim_destroy_radio(data);
2213                 spin_lock_bh(&hwsim_radio_lock);
2214         }
2215         spin_unlock_bh(&hwsim_radio_lock);
2216         class_destroy(hwsim_class);
2217 }
2218
2219 static const struct net_device_ops hwsim_netdev_ops = {
2220         .ndo_start_xmit         = hwsim_mon_xmit,
2221         .ndo_change_mtu         = eth_change_mtu,
2222         .ndo_set_mac_address    = eth_mac_addr,
2223         .ndo_validate_addr      = eth_validate_addr,
2224 };
2225
2226 static void hwsim_mon_setup(struct net_device *dev)
2227 {
2228         dev->netdev_ops = &hwsim_netdev_ops;
2229         dev->destructor = free_netdev;
2230         ether_setup(dev);
2231         dev->tx_queue_len = 0;
2232         dev->type = ARPHRD_IEEE80211_RADIOTAP;
2233         memset(dev->dev_addr, 0, ETH_ALEN);
2234         dev->dev_addr[0] = 0x12;
2235 }
2236
2237 static struct mac80211_hwsim_data *get_hwsim_data_ref_from_addr(const u8 *addr)
2238 {
2239         struct mac80211_hwsim_data *data;
2240         bool _found = false;
2241
2242         spin_lock_bh(&hwsim_radio_lock);
2243         list_for_each_entry(data, &hwsim_radios, list) {
2244                 if (memcmp(data->addresses[1].addr, addr, ETH_ALEN) == 0) {
2245                         _found = true;
2246                         break;
2247                 }
2248         }
2249         spin_unlock_bh(&hwsim_radio_lock);
2250
2251         if (!_found)
2252                 return NULL;
2253
2254         return data;
2255 }
2256
2257 static int hwsim_tx_info_frame_received_nl(struct sk_buff *skb_2,
2258                                            struct genl_info *info)
2259 {
2260
2261         struct ieee80211_hdr *hdr;
2262         struct mac80211_hwsim_data *data2;
2263         struct ieee80211_tx_info *txi;
2264         struct hwsim_tx_rate *tx_attempts;
2265         unsigned long ret_skb_ptr;
2266         struct sk_buff *skb, *tmp;
2267         const u8 *src;
2268         unsigned int hwsim_flags;
2269         int i;
2270         bool found = false;
2271
2272         if (info->snd_portid != wmediumd_portid)
2273                 return -EINVAL;
2274
2275         if (!info->attrs[HWSIM_ATTR_ADDR_TRANSMITTER] ||
2276             !info->attrs[HWSIM_ATTR_FLAGS] ||
2277             !info->attrs[HWSIM_ATTR_COOKIE] ||
2278             !info->attrs[HWSIM_ATTR_TX_INFO])
2279                 goto out;
2280
2281         src = (void *)nla_data(info->attrs[HWSIM_ATTR_ADDR_TRANSMITTER]);
2282         hwsim_flags = nla_get_u32(info->attrs[HWSIM_ATTR_FLAGS]);
2283         ret_skb_ptr = nla_get_u64(info->attrs[HWSIM_ATTR_COOKIE]);
2284
2285         data2 = get_hwsim_data_ref_from_addr(src);
2286         if (!data2)
2287                 goto out;
2288
2289         /* look for the skb matching the cookie passed back from user */
2290         skb_queue_walk_safe(&data2->pending, skb, tmp) {
2291                 if ((unsigned long)skb == ret_skb_ptr) {
2292                         skb_unlink(skb, &data2->pending);
2293                         found = true;
2294                         break;
2295                 }
2296         }
2297
2298         /* not found */
2299         if (!found)
2300                 goto out;
2301
2302         /* Tx info received because the frame was broadcasted on user space,
2303          so we get all the necessary info: tx attempts and skb control buff */
2304
2305         tx_attempts = (struct hwsim_tx_rate *)nla_data(
2306                        info->attrs[HWSIM_ATTR_TX_INFO]);
2307
2308         /* now send back TX status */
2309         txi = IEEE80211_SKB_CB(skb);
2310
2311         ieee80211_tx_info_clear_status(txi);
2312
2313         for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
2314                 txi->status.rates[i].idx = tx_attempts[i].idx;
2315                 txi->status.rates[i].count = tx_attempts[i].count;
2316                 /*txi->status.rates[i].flags = 0;*/
2317         }
2318
2319         txi->status.ack_signal = nla_get_u32(info->attrs[HWSIM_ATTR_SIGNAL]);
2320
2321         if (!(hwsim_flags & HWSIM_TX_CTL_NO_ACK) &&
2322            (hwsim_flags & HWSIM_TX_STAT_ACK)) {
2323                 if (skb->len >= 16) {
2324                         hdr = (struct ieee80211_hdr *) skb->data;
2325                         mac80211_hwsim_monitor_ack(data2->channel,
2326                                                    hdr->addr2);
2327                 }
2328                 txi->flags |= IEEE80211_TX_STAT_ACK;
2329         }
2330         ieee80211_tx_status_irqsafe(data2->hw, skb);
2331         return 0;
2332 out:
2333         return -EINVAL;
2334
2335 }
2336
2337 static int hwsim_cloned_frame_received_nl(struct sk_buff *skb_2,
2338                                           struct genl_info *info)
2339 {
2340
2341         struct mac80211_hwsim_data *data2;
2342         struct ieee80211_rx_status rx_status;
2343         const u8 *dst;
2344         int frame_data_len;
2345         void *frame_data;
2346         struct sk_buff *skb = NULL;
2347
2348         if (info->snd_portid != wmediumd_portid)
2349                 return -EINVAL;
2350
2351         if (!info->attrs[HWSIM_ATTR_ADDR_RECEIVER] ||
2352             !info->attrs[HWSIM_ATTR_FRAME] ||
2353             !info->attrs[HWSIM_ATTR_RX_RATE] ||
2354             !info->attrs[HWSIM_ATTR_SIGNAL])
2355                 goto out;
2356
2357         dst = (void *)nla_data(info->attrs[HWSIM_ATTR_ADDR_RECEIVER]);
2358         frame_data_len = nla_len(info->attrs[HWSIM_ATTR_FRAME]);
2359         frame_data = (void *)nla_data(info->attrs[HWSIM_ATTR_FRAME]);
2360
2361         /* Allocate new skb here */
2362         skb = alloc_skb(frame_data_len, GFP_KERNEL);
2363         if (skb == NULL)
2364                 goto err;
2365
2366         if (frame_data_len > IEEE80211_MAX_DATA_LEN)
2367                 goto err;
2368
2369         /* Copy the data */
2370         memcpy(skb_put(skb, frame_data_len), frame_data, frame_data_len);
2371
2372         data2 = get_hwsim_data_ref_from_addr(dst);
2373         if (!data2)
2374                 goto out;
2375
2376         /* check if radio is configured properly */
2377
2378         if (data2->idle || !data2->started)
2379                 goto out;
2380
2381         /* A frame is received from user space */
2382         memset(&rx_status, 0, sizeof(rx_status));
2383         rx_status.freq = data2->channel->center_freq;
2384         rx_status.band = data2->channel->band;
2385         rx_status.rate_idx = nla_get_u32(info->attrs[HWSIM_ATTR_RX_RATE]);
2386         rx_status.signal = nla_get_u32(info->attrs[HWSIM_ATTR_SIGNAL]);
2387
2388         memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
2389         ieee80211_rx_irqsafe(data2->hw, skb);
2390
2391         return 0;
2392 err:
2393         printk(KERN_DEBUG "mac80211_hwsim: error occurred in %s\n", __func__);
2394         goto out;
2395 out:
2396         dev_kfree_skb(skb);
2397         return -EINVAL;
2398 }
2399
2400 static int hwsim_register_received_nl(struct sk_buff *skb_2,
2401                                       struct genl_info *info)
2402 {
2403         struct mac80211_hwsim_data *data;
2404         int chans = 1;
2405
2406         spin_lock_bh(&hwsim_radio_lock);
2407         list_for_each_entry(data, &hwsim_radios, list)
2408                 chans = max(chans, data->channels);
2409         spin_unlock_bh(&hwsim_radio_lock);
2410
2411         /* In the future we should revise the userspace API and allow it
2412          * to set a flag that it does support multi-channel, then we can
2413          * let this pass conditionally on the flag.
2414          * For current userspace, prohibit it since it won't work right.
2415          */
2416         if (chans > 1)
2417                 return -EOPNOTSUPP;
2418
2419         if (wmediumd_portid)
2420                 return -EBUSY;
2421
2422         wmediumd_portid = info->snd_portid;
2423
2424         printk(KERN_DEBUG "mac80211_hwsim: received a REGISTER, "
2425                "switching to wmediumd mode with pid %d\n", info->snd_portid);
2426
2427         return 0;
2428 }
2429
2430 static int hwsim_create_radio_nl(struct sk_buff *msg, struct genl_info *info)
2431 {
2432         unsigned int chans = channels;
2433         const char *alpha2 = NULL;
2434         const struct ieee80211_regdomain *regd = NULL;
2435         bool reg_strict = info->attrs[HWSIM_ATTR_REG_STRICT_REG];
2436         bool p2p_device = info->attrs[HWSIM_ATTR_SUPPORT_P2P_DEVICE];
2437         bool use_chanctx;
2438
2439         if (info->attrs[HWSIM_ATTR_CHANNELS])
2440                 chans = nla_get_u32(info->attrs[HWSIM_ATTR_CHANNELS]);
2441
2442         if (info->attrs[HWSIM_ATTR_USE_CHANCTX])
2443                 use_chanctx = true;
2444         else
2445                 use_chanctx = (chans > 1);
2446
2447         if (info->attrs[HWSIM_ATTR_REG_HINT_ALPHA2])
2448                 alpha2 = nla_data(info->attrs[HWSIM_ATTR_REG_HINT_ALPHA2]);
2449
2450         if (info->attrs[HWSIM_ATTR_REG_CUSTOM_REG]) {
2451                 u32 idx = nla_get_u32(info->attrs[HWSIM_ATTR_REG_CUSTOM_REG]);
2452
2453                 if (idx >= ARRAY_SIZE(hwsim_world_regdom_custom))
2454                         return -EINVAL;
2455                 regd = hwsim_world_regdom_custom[idx];
2456         }
2457
2458         return mac80211_hwsim_create_radio(chans, alpha2, regd, reg_strict,
2459                                            p2p_device, use_chanctx);
2460 }
2461
2462 static int hwsim_destroy_radio_nl(struct sk_buff *msg, struct genl_info *info)
2463 {
2464         struct mac80211_hwsim_data *data;
2465         int idx;
2466
2467         if (!info->attrs[HWSIM_ATTR_RADIO_ID])
2468                 return -EINVAL;
2469         idx = nla_get_u32(info->attrs[HWSIM_ATTR_RADIO_ID]);
2470
2471         spin_lock_bh(&hwsim_radio_lock);
2472         list_for_each_entry(data, &hwsim_radios, list) {
2473                 if (data->idx != idx)
2474                         continue;
2475                 list_del(&data->list);
2476                 spin_unlock_bh(&hwsim_radio_lock);
2477                 mac80211_hwsim_destroy_radio(data);
2478                 return 0;
2479         }
2480         spin_unlock_bh(&hwsim_radio_lock);
2481
2482         return -ENODEV;
2483 }
2484
2485 /* Generic Netlink operations array */
2486 static const struct genl_ops hwsim_ops[] = {
2487         {
2488                 .cmd = HWSIM_CMD_REGISTER,
2489                 .policy = hwsim_genl_policy,
2490                 .doit = hwsim_register_received_nl,
2491                 .flags = GENL_ADMIN_PERM,
2492         },
2493         {
2494                 .cmd = HWSIM_CMD_FRAME,
2495                 .policy = hwsim_genl_policy,
2496                 .doit = hwsim_cloned_frame_received_nl,
2497         },
2498         {
2499                 .cmd = HWSIM_CMD_TX_INFO_FRAME,
2500                 .policy = hwsim_genl_policy,
2501                 .doit = hwsim_tx_info_frame_received_nl,
2502         },
2503         {
2504                 .cmd = HWSIM_CMD_CREATE_RADIO,
2505                 .policy = hwsim_genl_policy,
2506                 .doit = hwsim_create_radio_nl,
2507                 .flags = GENL_ADMIN_PERM,
2508         },
2509         {
2510                 .cmd = HWSIM_CMD_DESTROY_RADIO,
2511                 .policy = hwsim_genl_policy,
2512                 .doit = hwsim_destroy_radio_nl,
2513                 .flags = GENL_ADMIN_PERM,
2514         },
2515 };
2516
2517 static int mac80211_hwsim_netlink_notify(struct notifier_block *nb,
2518                                          unsigned long state,
2519                                          void *_notify)
2520 {
2521         struct netlink_notify *notify = _notify;
2522
2523         if (state != NETLINK_URELEASE)
2524                 return NOTIFY_DONE;
2525
2526         if (notify->portid == wmediumd_portid) {
2527                 printk(KERN_INFO "mac80211_hwsim: wmediumd released netlink"
2528                        " socket, switching to perfect channel medium\n");
2529                 wmediumd_portid = 0;
2530         }
2531         return NOTIFY_DONE;
2532
2533 }
2534
2535 static struct notifier_block hwsim_netlink_notifier = {
2536         .notifier_call = mac80211_hwsim_netlink_notify,
2537 };
2538
2539 static int hwsim_init_netlink(void)
2540 {
2541         int rc;
2542
2543         printk(KERN_INFO "mac80211_hwsim: initializing netlink\n");
2544
2545         rc = genl_register_family_with_ops(&hwsim_genl_family, hwsim_ops);
2546         if (rc)
2547                 goto failure;
2548
2549         rc = netlink_register_notifier(&hwsim_netlink_notifier);
2550         if (rc)
2551                 goto failure;
2552
2553         return 0;
2554
2555 failure:
2556         printk(KERN_DEBUG "mac80211_hwsim: error occurred in %s\n", __func__);
2557         return -EINVAL;
2558 }
2559
2560 static void hwsim_exit_netlink(void)
2561 {
2562         /* unregister the notifier */
2563         netlink_unregister_notifier(&hwsim_netlink_notifier);
2564         /* unregister the family */
2565         genl_unregister_family(&hwsim_genl_family);
2566 }
2567
2568 static int __init init_mac80211_hwsim(void)
2569 {
2570         int i, err;
2571
2572         if (radios < 0 || radios > 100)
2573                 return -EINVAL;
2574
2575         if (channels < 1)
2576                 return -EINVAL;
2577
2578         mac80211_hwsim_mchan_ops = mac80211_hwsim_ops;
2579         mac80211_hwsim_mchan_ops.hw_scan = mac80211_hwsim_hw_scan;
2580         mac80211_hwsim_mchan_ops.cancel_hw_scan = mac80211_hwsim_cancel_hw_scan;
2581         mac80211_hwsim_mchan_ops.sw_scan_start = NULL;
2582         mac80211_hwsim_mchan_ops.sw_scan_complete = NULL;
2583         mac80211_hwsim_mchan_ops.remain_on_channel = mac80211_hwsim_roc;
2584         mac80211_hwsim_mchan_ops.cancel_remain_on_channel = mac80211_hwsim_croc;
2585         mac80211_hwsim_mchan_ops.add_chanctx = mac80211_hwsim_add_chanctx;
2586         mac80211_hwsim_mchan_ops.remove_chanctx = mac80211_hwsim_remove_chanctx;
2587         mac80211_hwsim_mchan_ops.change_chanctx = mac80211_hwsim_change_chanctx;
2588         mac80211_hwsim_mchan_ops.assign_vif_chanctx =
2589                 mac80211_hwsim_assign_vif_chanctx;
2590         mac80211_hwsim_mchan_ops.unassign_vif_chanctx =
2591                 mac80211_hwsim_unassign_vif_chanctx;
2592
2593         spin_lock_init(&hwsim_radio_lock);
2594         INIT_LIST_HEAD(&hwsim_radios);
2595
2596         err = platform_driver_register(&mac80211_hwsim_driver);
2597         if (err)
2598                 return err;
2599
2600         hwsim_class = class_create(THIS_MODULE, "mac80211_hwsim");
2601         if (IS_ERR(hwsim_class)) {
2602                 err = PTR_ERR(hwsim_class);
2603                 goto out_unregister_driver;
2604         }
2605
2606         for (i = 0; i < radios; i++) {
2607                 const char *reg_alpha2 = NULL;
2608                 const struct ieee80211_regdomain *regd = NULL;
2609                 bool reg_strict = false;
2610
2611                 switch (regtest) {
2612                 case HWSIM_REGTEST_DIFF_COUNTRY:
2613                         if (i < ARRAY_SIZE(hwsim_alpha2s))
2614                                 reg_alpha2 = hwsim_alpha2s[i];
2615                         break;
2616                 case HWSIM_REGTEST_DRIVER_REG_FOLLOW:
2617                         if (!i)
2618                                 reg_alpha2 = hwsim_alpha2s[0];
2619                         break;
2620                 case HWSIM_REGTEST_STRICT_ALL:
2621                         reg_strict = true;
2622                 case HWSIM_REGTEST_DRIVER_REG_ALL:
2623                         reg_alpha2 = hwsim_alpha2s[0];
2624                         break;
2625                 case HWSIM_REGTEST_WORLD_ROAM:
2626                         if (i == 0)
2627                                 regd = &hwsim_world_regdom_custom_01;
2628                         break;
2629                 case HWSIM_REGTEST_CUSTOM_WORLD:
2630                         regd = &hwsim_world_regdom_custom_01;
2631                         break;
2632                 case HWSIM_REGTEST_CUSTOM_WORLD_2:
2633                         if (i == 0)
2634                                 regd = &hwsim_world_regdom_custom_01;
2635                         else if (i == 1)
2636                                 regd = &hwsim_world_regdom_custom_02;
2637                         break;
2638                 case HWSIM_REGTEST_STRICT_FOLLOW:
2639                         if (i == 0) {
2640                                 reg_strict = true;
2641                                 reg_alpha2 = hwsim_alpha2s[0];
2642                         }
2643                         break;
2644                 case HWSIM_REGTEST_STRICT_AND_DRIVER_REG:
2645                         if (i == 0) {
2646                                 reg_strict = true;
2647                                 reg_alpha2 = hwsim_alpha2s[0];
2648                         } else if (i == 1) {
2649                                 reg_alpha2 = hwsim_alpha2s[1];
2650                         }
2651                         break;
2652                 case HWSIM_REGTEST_ALL:
2653                         switch (i) {
2654                         case 0:
2655                                 regd = &hwsim_world_regdom_custom_01;
2656                                 break;
2657                         case 1:
2658                                 regd = &hwsim_world_regdom_custom_02;
2659                                 break;
2660                         case 2:
2661                                 reg_alpha2 = hwsim_alpha2s[0];
2662                                 break;
2663                         case 3:
2664                                 reg_alpha2 = hwsim_alpha2s[1];
2665                                 break;
2666                         case 4:
2667                                 reg_strict = true;
2668                                 reg_alpha2 = hwsim_alpha2s[2];
2669                                 break;
2670                         }
2671                         break;
2672                 default:
2673                         break;
2674                 }
2675
2676                 err = mac80211_hwsim_create_radio(channels, reg_alpha2,
2677                                                   regd, reg_strict,
2678                                                   support_p2p_device,
2679                                                   channels > 1);
2680                 if (err < 0)
2681                         goto out_free_radios;
2682         }
2683
2684         hwsim_mon = alloc_netdev(0, "hwsim%d", NET_NAME_UNKNOWN,
2685                                  hwsim_mon_setup);
2686         if (hwsim_mon == NULL) {
2687                 err = -ENOMEM;
2688                 goto out_free_radios;
2689         }
2690
2691         rtnl_lock();
2692         err = dev_alloc_name(hwsim_mon, hwsim_mon->name);
2693         if (err < 0) {
2694                 rtnl_unlock();
2695                 goto out_free_radios;
2696         }
2697
2698         err = register_netdevice(hwsim_mon);
2699         if (err < 0) {
2700                 rtnl_unlock();
2701                 goto out_free_mon;
2702         }
2703         rtnl_unlock();
2704
2705         err = hwsim_init_netlink();
2706         if (err < 0)
2707                 goto out_free_mon;
2708
2709         return 0;
2710
2711 out_free_mon:
2712         free_netdev(hwsim_mon);
2713 out_free_radios:
2714         mac80211_hwsim_free();
2715 out_unregister_driver:
2716         platform_driver_unregister(&mac80211_hwsim_driver);
2717         return err;
2718 }
2719 module_init(init_mac80211_hwsim);
2720
2721 static void __exit exit_mac80211_hwsim(void)
2722 {
2723         printk(KERN_DEBUG "mac80211_hwsim: unregister radios\n");
2724
2725         hwsim_exit_netlink();
2726
2727         mac80211_hwsim_free();
2728         unregister_netdev(hwsim_mon);
2729         platform_driver_unregister(&mac80211_hwsim_driver);
2730 }
2731 module_exit(exit_mac80211_hwsim);