drivers/net/wireless/mac80211_hwsim.c

   1 /*
   2  * mac80211_hwsim - software simulator of 802.11 radio(s) for mac80211
   3  * Copyright (c) 2008, Jouni Malinen <j@w1.fi>
   4  * Copyright (c) 2011, Javier Lopez <jlopex@gmail.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 /*
  12  * TODO:
  13  * - Add TSF sync and fix IBSS beacon transmission by adding
  14  *   competition for "air time" at TBTT
  15  * - RX filtering based on filter configuration (data->rx_filter)
  16  */
  17
  18 #include <linux/list.h>
  19 #include <linux/slab.h>
  20 #include <linux/spinlock.h>
  21 #include <net/dst.h>
  22 #include <net/xfrm.h>
  23 #include <net/mac80211.h>
  24 #include <net/ieee80211_radiotap.h>
  25 #include <linux/if_arp.h>
  26 #include <linux/rtnetlink.h>
  27 #include <linux/etherdevice.h>
  28 #include <linux/platform_device.h>
  29 #include <linux/debugfs.h>
  30 #include <linux/module.h>
  31 #include <linux/ktime.h>
  32 #include <net/genetlink.h>
  33 #include "mac80211_hwsim.h"
  34
  35 #define WARN_QUEUE 100
  36 #define MAX_QUEUE 200
  37
  38 MODULE_AUTHOR("Jouni Malinen");
  39 MODULE_DESCRIPTION("Software simulator of 802.11 radio(s) for mac80211");
  40 MODULE_LICENSE("GPL");
  41
  42 static u32 wmediumd_portid;
  43
  44 static int radios = 2;
  45 module_param(radios, int, 0444);
  46 MODULE_PARM_DESC(radios, "Number of simulated radios");
  47
  48 static int channels = 1;
  49 module_param(channels, int, 0444);
  50 MODULE_PARM_DESC(channels, "Number of concurrent channels");
  51
  52 static bool paged_rx = false;
  53 module_param(paged_rx, bool, 0644);
  54 MODULE_PARM_DESC(paged_rx, "Use paged SKBs for RX instead of linear ones");
  55
  56 static bool rctbl = false;
  57 module_param(rctbl, bool, 0444);
  58 MODULE_PARM_DESC(rctbl, "Handle rate control table");
  59
  60 static bool support_p2p_device = true;
  61 module_param(support_p2p_device, bool, 0444);
  62 MODULE_PARM_DESC(support_p2p_device, "Support P2P-Device interface type");
  63
  64 /**
  65  * enum hwsim_regtest - the type of regulatory tests we offer
  66  *
  67  * These are the different values you can use for the regtest
  68  * module parameter. This is useful to help test world roaming
  69  * and the driver regulatory_hint() call and combinations of these.
  70  * If you want to do specific alpha2 regulatory domain tests simply
  71  * use the userspace regulatory request as that will be respected as
  72  * well without the need of this module parameter. This is designed
  73  * only for testing the driver regulatory request, world roaming
  74  * and all possible combinations.
  75  *
  76  * @HWSIM_REGTEST_DISABLED: No regulatory tests are performed,
  77  *      this is the default value.
  78  * @HWSIM_REGTEST_DRIVER_REG_FOLLOW: Used for testing the driver regulatory
  79  *      hint, only one driver regulatory hint will be sent as such the
  80  *      secondary radios are expected to follow.
  81  * @HWSIM_REGTEST_DRIVER_REG_ALL: Used for testing the driver regulatory
  82  *      request with all radios reporting the same regulatory domain.
  83  * @HWSIM_REGTEST_DIFF_COUNTRY: Used for testing the drivers calling
  84  *      different regulatory domains requests. Expected behaviour is for
  85  *      an intersection to occur but each device will still use their
  86  *      respective regulatory requested domains. Subsequent radios will
  87  *      use the resulting intersection.
  88  * @HWSIM_REGTEST_WORLD_ROAM: Used for testing the world roaming. We accomplish
  89  *      this by using a custom beacon-capable regulatory domain for the first
  90  *      radio. All other device world roam.
  91  * @HWSIM_REGTEST_CUSTOM_WORLD: Used for testing the custom world regulatory
  92  *      domain requests. All radios will adhere to this custom world regulatory
  93  *      domain.
  94  * @HWSIM_REGTEST_CUSTOM_WORLD_2: Used for testing 2 custom world regulatory
  95  *      domain requests. The first radio will adhere to the first custom world
  96  *      regulatory domain, the second one to the second custom world regulatory
  97  *      domain. All other devices will world roam.
  98  * @HWSIM_REGTEST_STRICT_FOLLOW_: Used for testing strict regulatory domain
  99  *      settings, only the first radio will send a regulatory domain request
 100  *      and use strict settings. The rest of the radios are expected to follow.
 101  * @HWSIM_REGTEST_STRICT_ALL: Used for testing strict regulatory domain
 102  *      settings. All radios will adhere to this.
 103  * @HWSIM_REGTEST_STRICT_AND_DRIVER_REG: Used for testing strict regulatory
 104  *      domain settings, combined with secondary driver regulatory domain
 105  *      settings. The first radio will get a strict regulatory domain setting
 106  *      using the first driver regulatory request and the second radio will use
 107  *      non-strict settings using the second driver regulatory request. All
 108  *      other devices should follow the intersection created between the
 109  *      first two.
 110  * @HWSIM_REGTEST_ALL: Used for testing every possible mix. You will need
 111  *      at least 6 radios for a complete test. We will test in this order:
 112  *      1 - driver custom world regulatory domain
 113  *      2 - second custom world regulatory domain
 114  *      3 - first driver regulatory domain request
 115  *      4 - second driver regulatory domain request
 116  *      5 - strict regulatory domain settings using the third driver regulatory
 117  *          domain request
 118  *      6 and on - should follow the intersection of the 3rd, 4rth and 5th radio
 119  *                 regulatory requests.
 120  */
 121 enum hwsim_regtest {
 122         HWSIM_REGTEST_DISABLED = 0,
 123         HWSIM_REGTEST_DRIVER_REG_FOLLOW = 1,
 124         HWSIM_REGTEST_DRIVER_REG_ALL = 2,
 125         HWSIM_REGTEST_DIFF_COUNTRY = 3,
 126         HWSIM_REGTEST_WORLD_ROAM = 4,
 127         HWSIM_REGTEST_CUSTOM_WORLD = 5,
 128         HWSIM_REGTEST_CUSTOM_WORLD_2 = 6,
 129         HWSIM_REGTEST_STRICT_FOLLOW = 7,
 130         HWSIM_REGTEST_STRICT_ALL = 8,
 131         HWSIM_REGTEST_STRICT_AND_DRIVER_REG = 9,
 132         HWSIM_REGTEST_ALL = 10,
 133 };
 134
 135 /* Set to one of the HWSIM_REGTEST_* values above */
 136 static int regtest = HWSIM_REGTEST_DISABLED;
 137 module_param(regtest, int, 0444);
 138 MODULE_PARM_DESC(regtest, "The type of regulatory test we want to run");
 139
 140 static const char *hwsim_alpha2s[] = {
 141         "FI",
 142         "AL",
 143         "US",
 144         "DE",
 145         "JP",
 146         "AL",
 147 };
 148
 149 static const struct ieee80211_regdomain hwsim_world_regdom_custom_01 = {
 150         .n_reg_rules = 4,
 151         .alpha2 =  "99",
 152         .reg_rules = {
 153                 REG_RULE(2412-10, 2462+10, 40, 0, 20, 0),
 154                 REG_RULE(2484-10, 2484+10, 40, 0, 20, 0),
 155                 REG_RULE(5150-10, 5240+10, 40, 0, 30, 0),
 156                 REG_RULE(5745-10, 5825+10, 40, 0, 30, 0),
 157         }
 158 };
 159
 160 static const struct ieee80211_regdomain hwsim_world_regdom_custom_02 = {
 161         .n_reg_rules = 2,
 162         .alpha2 =  "99",
 163         .reg_rules = {
 164                 REG_RULE(2412-10, 2462+10, 40, 0, 20, 0),
 165                 REG_RULE(5725-10, 5850+10, 40, 0, 30,
 166                          NL80211_RRF_NO_IR),
 167         }
 168 };
 169
 170 static const struct ieee80211_regdomain *hwsim_world_regdom_custom[] = {
 171         &hwsim_world_regdom_custom_01,
 172         &hwsim_world_regdom_custom_02,
 173 };
 174
 175 struct hwsim_vif_priv {
 176         u32 magic;
 177         u8 bssid[ETH_ALEN];
 178         bool assoc;
 179         bool bcn_en;
 180         u16 aid;
 181 };
 182
 183 #define HWSIM_VIF_MAGIC 0x69537748
 184
 185 static inline void hwsim_check_magic(struct ieee80211_vif *vif)
 186 {
 187         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 188         WARN(vp->magic != HWSIM_VIF_MAGIC,
 189              "Invalid VIF (%p) magic %#x, %pM, %d/%d\n",
 190              vif, vp->magic, vif->addr, vif->type, vif->p2p);
 191 }
 192
 193 static inline void hwsim_set_magic(struct ieee80211_vif *vif)
 194 {
 195         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 196         vp->magic = HWSIM_VIF_MAGIC;
 197 }
 198
 199 static inline void hwsim_clear_magic(struct ieee80211_vif *vif)
 200 {
 201         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 202         vp->magic = 0;
 203 }
 204
 205 struct hwsim_sta_priv {
 206         u32 magic;
 207 };
 208
 209 #define HWSIM_STA_MAGIC 0x6d537749
 210
 211 static inline void hwsim_check_sta_magic(struct ieee80211_sta *sta)
 212 {
 213         struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
 214         WARN_ON(sp->magic != HWSIM_STA_MAGIC);
 215 }
 216
 217 static inline void hwsim_set_sta_magic(struct ieee80211_sta *sta)
 218 {
 219         struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
 220         sp->magic = HWSIM_STA_MAGIC;
 221 }
 222
 223 static inline void hwsim_clear_sta_magic(struct ieee80211_sta *sta)
 224 {
 225         struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
 226         sp->magic = 0;
 227 }
 228
 229 struct hwsim_chanctx_priv {
 230         u32 magic;
 231 };
 232
 233 #define HWSIM_CHANCTX_MAGIC 0x6d53774a
 234
 235 static inline void hwsim_check_chanctx_magic(struct ieee80211_chanctx_conf *c)
 236 {
 237         struct hwsim_chanctx_priv *cp = (void *)c->drv_priv;
 238         WARN_ON(cp->magic != HWSIM_CHANCTX_MAGIC);
 239 }
 240
 241 static inline void hwsim_set_chanctx_magic(struct ieee80211_chanctx_conf *c)
 242 {
 243         struct hwsim_chanctx_priv *cp = (void *)c->drv_priv;
 244         cp->magic = HWSIM_CHANCTX_MAGIC;
 245 }
 246
 247 static inline void hwsim_clear_chanctx_magic(struct ieee80211_chanctx_conf *c)
 248 {
 249         struct hwsim_chanctx_priv *cp = (void *)c->drv_priv;
 250         cp->magic = 0;
 251 }
 252
 253 static struct class *hwsim_class;
 254
 255 static struct net_device *hwsim_mon; /* global monitor netdev */
 256
 257 #define CHAN2G(_freq)  { \
 258         .band = IEEE80211_BAND_2GHZ, \
 259         .center_freq = (_freq), \
 260         .hw_value = (_freq), \
 261         .max_power = 20, \
 262 }
 263
 264 #define CHAN5G(_freq) { \
 265         .band = IEEE80211_BAND_5GHZ, \
 266         .center_freq = (_freq), \
 267         .hw_value = (_freq), \
 268         .max_power = 20, \
 269 }
 270
 271 static const struct ieee80211_channel hwsim_channels_2ghz[] = {
 272         CHAN2G(2412), /* Channel 1 */
 273         CHAN2G(2417), /* Channel 2 */
 274         CHAN2G(2422), /* Channel 3 */
 275         CHAN2G(2427), /* Channel 4 */
 276         CHAN2G(2432), /* Channel 5 */
 277         CHAN2G(2437), /* Channel 6 */
 278         CHAN2G(2442), /* Channel 7 */
 279         CHAN2G(2447), /* Channel 8 */
 280         CHAN2G(2452), /* Channel 9 */
 281         CHAN2G(2457), /* Channel 10 */
 282         CHAN2G(2462), /* Channel 11 */
 283         CHAN2G(2467), /* Channel 12 */
 284         CHAN2G(2472), /* Channel 13 */
 285         CHAN2G(2484), /* Channel 14 */
 286 };
 287
 288 static const struct ieee80211_channel hwsim_channels_5ghz[] = {
 289         CHAN5G(5180), /* Channel 36 */
 290         CHAN5G(5200), /* Channel 40 */
 291         CHAN5G(5220), /* Channel 44 */
 292         CHAN5G(5240), /* Channel 48 */
 293
 294         CHAN5G(5260), /* Channel 52 */
 295         CHAN5G(5280), /* Channel 56 */
 296         CHAN5G(5300), /* Channel 60 */
 297         CHAN5G(5320), /* Channel 64 */
 298
 299         CHAN5G(5500), /* Channel 100 */
 300         CHAN5G(5520), /* Channel 104 */
 301         CHAN5G(5540), /* Channel 108 */
 302         CHAN5G(5560), /* Channel 112 */
 303         CHAN5G(5580), /* Channel 116 */
 304         CHAN5G(5600), /* Channel 120 */
 305         CHAN5G(5620), /* Channel 124 */
 306         CHAN5G(5640), /* Channel 128 */
 307         CHAN5G(5660), /* Channel 132 */
 308         CHAN5G(5680), /* Channel 136 */
 309         CHAN5G(5700), /* Channel 140 */
 310
 311         CHAN5G(5745), /* Channel 149 */
 312         CHAN5G(5765), /* Channel 153 */
 313         CHAN5G(5785), /* Channel 157 */
 314         CHAN5G(5805), /* Channel 161 */
 315         CHAN5G(5825), /* Channel 165 */
 316 };
 317
 318 static const struct ieee80211_rate hwsim_rates[] = {
 319         { .bitrate = 10 },
 320         { .bitrate = 20, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
 321         { .bitrate = 55, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
 322         { .bitrate = 110, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
 323         { .bitrate = 60 },
 324         { .bitrate = 90 },
 325         { .bitrate = 120 },
 326         { .bitrate = 180 },
 327         { .bitrate = 240 },
 328         { .bitrate = 360 },
 329         { .bitrate = 480 },
 330         { .bitrate = 540 }
 331 };
 332
 333 #define OUI_QCA 0x001374
 334 #define QCA_NL80211_SUBCMD_TEST 1
 335 enum qca_nl80211_vendor_subcmds {
 336         QCA_WLAN_VENDOR_ATTR_TEST = 8,
 337         QCA_WLAN_VENDOR_ATTR_MAX = QCA_WLAN_VENDOR_ATTR_TEST
 338 };
 339
 340 static const struct nla_policy
 341 hwsim_vendor_test_policy[QCA_WLAN_VENDOR_ATTR_MAX + 1] = {
 342         [QCA_WLAN_VENDOR_ATTR_MAX] = { .type = NLA_U32 },
 343 };
 344
 345 static int mac80211_hwsim_vendor_cmd_test(struct wiphy *wiphy,
 346                                           struct wireless_dev *wdev,
 347                                           const void *data, int data_len)
 348 {
 349         struct sk_buff *skb;
 350         struct nlattr *tb[QCA_WLAN_VENDOR_ATTR_MAX + 1];
 351         int err;
 352         u32 val;
 353
 354         err = nla_parse(tb, QCA_WLAN_VENDOR_ATTR_MAX, data, data_len,
 355                         hwsim_vendor_test_policy);
 356         if (err)
 357                 return err;
 358         if (!tb[QCA_WLAN_VENDOR_ATTR_TEST])
 359                 return -EINVAL;
 360         val = nla_get_u32(tb[QCA_WLAN_VENDOR_ATTR_TEST]);
 361         wiphy_debug(wiphy, "%s: test=%u\n", __func__, val);
 362
 363         /* Send a vendor event as a test. Note that this would not normally be
 364          * done within a command handler, but rather, based on some other
 365          * trigger. For simplicity, this command is used to trigger the event
 366          * here.
 367          *
 368          * event_idx = 0 (index in mac80211_hwsim_vendor_commands)
 369          */
 370         skb = cfg80211_vendor_event_alloc(wiphy, wdev, 100, 0, GFP_KERNEL);
 371         if (skb) {
 372                 /* skb_put() or nla_put() will fill up data within
 373                  * NL80211_ATTR_VENDOR_DATA.
 374                  */
 375
 376                 /* Add vendor data */
 377                 nla_put_u32(skb, QCA_WLAN_VENDOR_ATTR_TEST, val + 1);
 378
 379                 /* Send the event - this will call nla_nest_end() */
 380                 cfg80211_vendor_event(skb, GFP_KERNEL);
 381         }
 382
 383         /* Send a response to the command */
 384         skb = cfg80211_vendor_cmd_alloc_reply_skb(wiphy, 10);
 385         if (!skb)
 386                 return -ENOMEM;
 387
 388         /* skb_put() or nla_put() will fill up data within
 389          * NL80211_ATTR_VENDOR_DATA
 390          */
 391         nla_put_u32(skb, QCA_WLAN_VENDOR_ATTR_TEST, val + 2);
 392
 393         return cfg80211_vendor_cmd_reply(skb);
 394 }
 395
 396 static struct wiphy_vendor_command mac80211_hwsim_vendor_commands[] = {
 397         {
 398                 .info = { .vendor_id = OUI_QCA,
 399                           .subcmd = QCA_NL80211_SUBCMD_TEST },
 400                 .flags = WIPHY_VENDOR_CMD_NEED_NETDEV,
 401                 .doit = mac80211_hwsim_vendor_cmd_test,
 402         }
 403 };
 404
 405 /* Advertise support vendor specific events */
 406 static const struct nl80211_vendor_cmd_info mac80211_hwsim_vendor_events[] = {
 407         { .vendor_id = OUI_QCA, .subcmd = 1 },
 408 };
 409
 410 static const struct ieee80211_iface_limit hwsim_if_limits[] = {
 411         { .max = 1, .types = BIT(NL80211_IFTYPE_ADHOC) },
 412         { .max = 2048,  .types = BIT(NL80211_IFTYPE_STATION) |
 413                                  BIT(NL80211_IFTYPE_P2P_CLIENT) |
 414 #ifdef CONFIG_MAC80211_MESH
 415                                  BIT(NL80211_IFTYPE_MESH_POINT) |
 416 #endif
 417                                  BIT(NL80211_IFTYPE_AP) |
 418                                  BIT(NL80211_IFTYPE_P2P_GO) },
 419         /* must be last, see hwsim_if_comb */
 420         { .max = 1, .types = BIT(NL80211_IFTYPE_P2P_DEVICE) }
 421 };
 422
 423 static const struct ieee80211_iface_limit hwsim_if_dfs_limits[] = {
 424         { .max = 8, .types = BIT(NL80211_IFTYPE_AP) },
 425 };
 426
 427 static const struct ieee80211_iface_combination hwsim_if_comb[] = {
 428         {
 429                 .limits = hwsim_if_limits,
 430                 /* remove the last entry which is P2P_DEVICE */
 431                 .n_limits = ARRAY_SIZE(hwsim_if_limits) - 1,
 432                 .max_interfaces = 2048,
 433                 .num_different_channels = 1,
 434         },
 435         {
 436                 .limits = hwsim_if_dfs_limits,
 437                 .n_limits = ARRAY_SIZE(hwsim_if_dfs_limits),
 438                 .max_interfaces = 8,
 439                 .num_different_channels = 1,
 440                 .radar_detect_widths = BIT(NL80211_CHAN_WIDTH_20_NOHT) |
 441                                        BIT(NL80211_CHAN_WIDTH_20) |
 442                                        BIT(NL80211_CHAN_WIDTH_40) |
 443                                        BIT(NL80211_CHAN_WIDTH_80) |
 444                                        BIT(NL80211_CHAN_WIDTH_160),
 445         }
 446 };
 447
 448 static const struct ieee80211_iface_combination hwsim_if_comb_p2p_dev[] = {
 449         {
 450                 .limits = hwsim_if_limits,
 451                 .n_limits = ARRAY_SIZE(hwsim_if_limits),
 452                 .max_interfaces = 2048,
 453                 .num_different_channels = 1,
 454         },
 455         {
 456                 .limits = hwsim_if_dfs_limits,
 457                 .n_limits = ARRAY_SIZE(hwsim_if_dfs_limits),
 458                 .max_interfaces = 8,
 459                 .num_different_channels = 1,
 460                 .radar_detect_widths = BIT(NL80211_CHAN_WIDTH_20_NOHT) |
 461                                        BIT(NL80211_CHAN_WIDTH_20) |
 462                                        BIT(NL80211_CHAN_WIDTH_40) |
 463                                        BIT(NL80211_CHAN_WIDTH_80) |
 464                                        BIT(NL80211_CHAN_WIDTH_160),
 465         }
 466 };
 467
 468 static spinlock_t hwsim_radio_lock;
 469 static struct list_head hwsim_radios;
 470 static int hwsim_radio_idx;
 471
 472 static struct platform_driver mac80211_hwsim_driver = {
 473         .driver = {
 474                 .name = "mac80211_hwsim",
 475         },
 476 };
 477
 478 struct mac80211_hwsim_data {
 479         struct list_head list;
 480         struct ieee80211_hw *hw;
 481         struct device *dev;
 482         struct ieee80211_supported_band bands[IEEE80211_NUM_BANDS];
 483         struct ieee80211_channel channels_2ghz[ARRAY_SIZE(hwsim_channels_2ghz)];
 484         struct ieee80211_channel channels_5ghz[ARRAY_SIZE(hwsim_channels_5ghz)];
 485         struct ieee80211_rate rates[ARRAY_SIZE(hwsim_rates)];
 486         struct ieee80211_iface_combination if_combination;
 487
 488         struct mac_address addresses[2];
 489         int channels, idx;
 490         bool use_chanctx;
 491         bool destroy_on_close;
 492         struct work_struct destroy_work;
 493         u32 portid;
 494         char alpha2[2];
 495         const struct ieee80211_regdomain *regd;
 496
 497         struct ieee80211_channel *tmp_chan;
 498         struct delayed_work roc_done;
 499         struct delayed_work hw_scan;
 500         struct cfg80211_scan_request *hw_scan_request;
 501         struct ieee80211_vif *hw_scan_vif;
 502         int scan_chan_idx;
 503         u8 scan_addr[ETH_ALEN];
 504
 505         struct ieee80211_channel *channel;
 506         u64 beacon_int  /* beacon interval in us */;
 507         unsigned int rx_filter;
 508         bool started, idle, scanning;
 509         struct mutex mutex;
 510         struct tasklet_hrtimer beacon_timer;
 511         enum ps_mode {
 512                 PS_DISABLED, PS_ENABLED, PS_AUTO_POLL, PS_MANUAL_POLL
 513         } ps;
 514         bool ps_poll_pending;
 515         struct dentry *debugfs;
 516
 517         struct sk_buff_head pending;    /* packets pending */
 518         /*
 519          * Only radios in the same group can communicate together (the
 520          * channel has to match too). Each bit represents a group. A
 521          * radio can be in more than one group.
 522          */
 523         u64 group;
 524
 525         int power_level;
 526
 527         /* difference between this hw's clock and the real clock, in usecs */
 528         s64 tsf_offset;
 529         s64 bcn_delta;
 530         /* absolute beacon transmission time. Used to cover up "tx" delay. */
 531         u64 abs_bcn_ts;
 532
 533         /* Stats */
 534         u64 tx_pkts;
 535         u64 rx_pkts;
 536         u64 tx_bytes;
 537         u64 rx_bytes;
 538         u64 tx_dropped;
 539         u64 tx_failed;
 540 };
 541
 542
 543 struct hwsim_radiotap_hdr {
 544         struct ieee80211_radiotap_header hdr;
 545         __le64 rt_tsft;
 546         u8 rt_flags;
 547         u8 rt_rate;
 548         __le16 rt_channel;
 549         __le16 rt_chbitmask;
 550 } __packed;
 551
 552 struct hwsim_radiotap_ack_hdr {
 553         struct ieee80211_radiotap_header hdr;
 554         u8 rt_flags;
 555         u8 pad;
 556         __le16 rt_channel;
 557         __le16 rt_chbitmask;
 558 } __packed;
 559
 560 /* MAC80211_HWSIM netlinf family */
 561 static struct genl_family hwsim_genl_family = {
 562         .id = GENL_ID_GENERATE,
 563         .hdrsize = 0,
 564         .name = "MAC80211_HWSIM",
 565         .version = 1,
 566         .maxattr = HWSIM_ATTR_MAX,
 567 };
 568
 569 enum hwsim_multicast_groups {
 570         HWSIM_MCGRP_CONFIG,
 571 };
 572
 573 static const struct genl_multicast_group hwsim_mcgrps[] = {
 574         [HWSIM_MCGRP_CONFIG] = { .name = "config", },
 575 };
 576
 577 /* MAC80211_HWSIM netlink policy */
 578
 579 static const struct nla_policy hwsim_genl_policy[HWSIM_ATTR_MAX + 1] = {
 580         [HWSIM_ATTR_ADDR_RECEIVER] = { .type = NLA_UNSPEC, .len = ETH_ALEN },
 581         [HWSIM_ATTR_ADDR_TRANSMITTER] = { .type = NLA_UNSPEC, .len = ETH_ALEN },
 582         [HWSIM_ATTR_FRAME] = { .type = NLA_BINARY,
 583                                .len = IEEE80211_MAX_DATA_LEN },
 584         [HWSIM_ATTR_FLAGS] = { .type = NLA_U32 },
 585         [HWSIM_ATTR_RX_RATE] = { .type = NLA_U32 },
 586         [HWSIM_ATTR_SIGNAL] = { .type = NLA_U32 },
 587         [HWSIM_ATTR_TX_INFO] = { .type = NLA_UNSPEC,
 588                                  .len = IEEE80211_TX_MAX_RATES *
 589                                         sizeof(struct hwsim_tx_rate)},
 590         [HWSIM_ATTR_COOKIE] = { .type = NLA_U64 },
 591         [HWSIM_ATTR_CHANNELS] = { .type = NLA_U32 },
 592         [HWSIM_ATTR_RADIO_ID] = { .type = NLA_U32 },
 593         [HWSIM_ATTR_REG_HINT_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 594         [HWSIM_ATTR_REG_CUSTOM_REG] = { .type = NLA_U32 },
 595         [HWSIM_ATTR_REG_STRICT_REG] = { .type = NLA_FLAG },
 596         [HWSIM_ATTR_SUPPORT_P2P_DEVICE] = { .type = NLA_FLAG },
 597         [HWSIM_ATTR_DESTROY_RADIO_ON_CLOSE] = { .type = NLA_FLAG },
 598         [HWSIM_ATTR_RADIO_NAME] = { .type = NLA_STRING },
 599         [HWSIM_ATTR_NO_VIF] = { .type = NLA_FLAG },
 600         [HWSIM_ATTR_FREQ] = { .type = NLA_U32 },
 601 };
 602
 603 static void mac80211_hwsim_tx_frame(struct ieee80211_hw *hw,
 604                                     struct sk_buff *skb,
 605                                     struct ieee80211_channel *chan);
 606
 607 /* sysfs attributes */
 608 static void hwsim_send_ps_poll(void *dat, u8 *mac, struct ieee80211_vif *vif)
 609 {
 610         struct mac80211_hwsim_data *data = dat;
 611         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 612         struct sk_buff *skb;
 613         struct ieee80211_pspoll *pspoll;
 614
 615         if (!vp->assoc)
 616                 return;
 617
 618         wiphy_debug(data->hw->wiphy,
 619                     "%s: send PS-Poll to %pM for aid %d\n",
 620                     __func__, vp->bssid, vp->aid);
 621
 622         skb = dev_alloc_skb(sizeof(*pspoll));
 623         if (!skb)
 624                 return;
 625         pspoll = (void *) skb_put(skb, sizeof(*pspoll));
 626         pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
 627                                             IEEE80211_STYPE_PSPOLL |
 628                                             IEEE80211_FCTL_PM);
 629         pspoll->aid = cpu_to_le16(0xc000 | vp->aid);
 630         memcpy(pspoll->bssid, vp->bssid, ETH_ALEN);
 631         memcpy(pspoll->ta, mac, ETH_ALEN);
 632
 633         rcu_read_lock();
 634         mac80211_hwsim_tx_frame(data->hw, skb,
 635                                 rcu_dereference(vif->chanctx_conf)->def.chan);
 636         rcu_read_unlock();
 637 }
 638
 639 static void hwsim_send_nullfunc(struct mac80211_hwsim_data *data, u8 *mac,
 640                                 struct ieee80211_vif *vif, int ps)
 641 {
 642         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 643         struct sk_buff *skb;
 644         struct ieee80211_hdr *hdr;
 645
 646         if (!vp->assoc)
 647                 return;
 648
 649         wiphy_debug(data->hw->wiphy,
 650                     "%s: send data::nullfunc to %pM ps=%d\n",
 651                     __func__, vp->bssid, ps);
 652
 653         skb = dev_alloc_skb(sizeof(*hdr));
 654         if (!skb)
 655                 return;
 656         hdr = (void *) skb_put(skb, sizeof(*hdr) - ETH_ALEN);
 657         hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
 658                                          IEEE80211_STYPE_NULLFUNC |
 659                                          (ps ? IEEE80211_FCTL_PM : 0));
 660         hdr->duration_id = cpu_to_le16(0);
 661         memcpy(hdr->addr1, vp->bssid, ETH_ALEN);
 662         memcpy(hdr->addr2, mac, ETH_ALEN);
 663         memcpy(hdr->addr3, vp->bssid, ETH_ALEN);
 664
 665         rcu_read_lock();
 666         mac80211_hwsim_tx_frame(data->hw, skb,
 667                                 rcu_dereference(vif->chanctx_conf)->def.chan);
 668         rcu_read_unlock();
 669 }
 670
 671
 672 static void hwsim_send_nullfunc_ps(void *dat, u8 *mac,
 673                                    struct ieee80211_vif *vif)
 674 {
 675         struct mac80211_hwsim_data *data = dat;
 676         hwsim_send_nullfunc(data, mac, vif, 1);
 677 }
 678
 679 static void hwsim_send_nullfunc_no_ps(void *dat, u8 *mac,
 680                                       struct ieee80211_vif *vif)
 681 {
 682         struct mac80211_hwsim_data *data = dat;
 683         hwsim_send_nullfunc(data, mac, vif, 0);
 684 }
 685
 686 static int hwsim_fops_ps_read(void *dat, u64 *val)
 687 {
 688         struct mac80211_hwsim_data *data = dat;
 689         *val = data->ps;
 690         return 0;
 691 }
 692
 693 static int hwsim_fops_ps_write(void *dat, u64 val)
 694 {
 695         struct mac80211_hwsim_data *data = dat;
 696         enum ps_mode old_ps;
 697
 698         if (val != PS_DISABLED && val != PS_ENABLED && val != PS_AUTO_POLL &&
 699             val != PS_MANUAL_POLL)
 700                 return -EINVAL;
 701
 702         old_ps = data->ps;
 703         data->ps = val;
 704
 705         local_bh_disable();
 706         if (val == PS_MANUAL_POLL) {
 707                 ieee80211_iterate_active_interfaces_atomic(
 708                         data->hw, IEEE80211_IFACE_ITER_NORMAL,
 709                         hwsim_send_ps_poll, data);
 710                 data->ps_poll_pending = true;
 711         } else if (old_ps == PS_DISABLED && val != PS_DISABLED) {
 712                 ieee80211_iterate_active_interfaces_atomic(
 713                         data->hw, IEEE80211_IFACE_ITER_NORMAL,
 714                         hwsim_send_nullfunc_ps, data);
 715         } else if (old_ps != PS_DISABLED && val == PS_DISABLED) {
 716                 ieee80211_iterate_active_interfaces_atomic(
 717                         data->hw, IEEE80211_IFACE_ITER_NORMAL,
 718                         hwsim_send_nullfunc_no_ps, data);
 719         }
 720         local_bh_enable();
 721
 722         return 0;
 723 }
 724
 725 DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_ps, hwsim_fops_ps_read, hwsim_fops_ps_write,
 726                         "%llu\n");
 727
 728 static int hwsim_write_simulate_radar(void *dat, u64 val)
 729 {
 730         struct mac80211_hwsim_data *data = dat;
 731
 732         ieee80211_radar_detected(data->hw);
 733
 734         return 0;
 735 }
 736
 737 DEFINE_SIMPLE_ATTRIBUTE(hwsim_simulate_radar, NULL,
 738                         hwsim_write_simulate_radar, "%llu\n");
 739
 740 static int hwsim_fops_group_read(void *dat, u64 *val)
 741 {
 742         struct mac80211_hwsim_data *data = dat;
 743         *val = data->group;
 744         return 0;
 745 }
 746
 747 static int hwsim_fops_group_write(void *dat, u64 val)
 748 {
 749         struct mac80211_hwsim_data *data = dat;
 750         data->group = val;
 751         return 0;
 752 }
 753
 754 DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_group,
 755                         hwsim_fops_group_read, hwsim_fops_group_write,
 756                         "%llx\n");
 757
 758 static netdev_tx_t hwsim_mon_xmit(struct sk_buff *skb,
 759                                         struct net_device *dev)
 760 {
 761         /* TODO: allow packet injection */
 762         dev_kfree_skb(skb);
 763         return NETDEV_TX_OK;
 764 }
 765
 766 static inline u64 mac80211_hwsim_get_tsf_raw(void)
 767 {
 768         return ktime_to_us(ktime_get_real());
 769 }
 770
 771 static __le64 __mac80211_hwsim_get_tsf(struct mac80211_hwsim_data *data)
 772 {
 773         u64 now = mac80211_hwsim_get_tsf_raw();
 774         return cpu_to_le64(now + data->tsf_offset);
 775 }
 776
 777 static u64 mac80211_hwsim_get_tsf(struct ieee80211_hw *hw,
 778                                   struct ieee80211_vif *vif)
 779 {
 780         struct mac80211_hwsim_data *data = hw->priv;
 781         return le64_to_cpu(__mac80211_hwsim_get_tsf(data));
 782 }
 783
 784 static void mac80211_hwsim_set_tsf(struct ieee80211_hw *hw,
 785                 struct ieee80211_vif *vif, u64 tsf)
 786 {
 787         struct mac80211_hwsim_data *data = hw->priv;
 788         u64 now = mac80211_hwsim_get_tsf(hw, vif);
 789         u32 bcn_int = data->beacon_int;
 790         u64 delta = abs64(tsf - now);
 791
 792         /* adjust after beaconing with new timestamp at old TBTT */
 793         if (tsf > now) {
 794                 data->tsf_offset += delta;
 795                 data->bcn_delta = do_div(delta, bcn_int);
 796         } else {
 797                 data->tsf_offset -= delta;
 798                 data->bcn_delta = -do_div(delta, bcn_int);
 799         }
 800 }
 801
 802 static void mac80211_hwsim_monitor_rx(struct ieee80211_hw *hw,
 803                                       struct sk_buff *tx_skb,
 804                                       struct ieee80211_channel *chan)
 805 {
 806         struct mac80211_hwsim_data *data = hw->priv;
 807         struct sk_buff *skb;
 808         struct hwsim_radiotap_hdr *hdr;
 809         u16 flags;
 810         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_skb);
 811         struct ieee80211_rate *txrate = ieee80211_get_tx_rate(hw, info);
 812
 813         if (!netif_running(hwsim_mon))
 814                 return;
 815
 816         skb = skb_copy_expand(tx_skb, sizeof(*hdr), 0, GFP_ATOMIC);
 817         if (skb == NULL)
 818                 return;
 819
 820         hdr = (struct hwsim_radiotap_hdr *) skb_push(skb, sizeof(*hdr));
 821         hdr->hdr.it_version = PKTHDR_RADIOTAP_VERSION;
 822         hdr->hdr.it_pad = 0;
 823         hdr->hdr.it_len = cpu_to_le16(sizeof(*hdr));
 824         hdr->hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
 825                                           (1 << IEEE80211_RADIOTAP_RATE) |
 826                                           (1 << IEEE80211_RADIOTAP_TSFT) |
 827                                           (1 << IEEE80211_RADIOTAP_CHANNEL));
 828         hdr->rt_tsft = __mac80211_hwsim_get_tsf(data);
 829         hdr->rt_flags = 0;
 830         hdr->rt_rate = txrate->bitrate / 5;
 831         hdr->rt_channel = cpu_to_le16(chan->center_freq);
 832         flags = IEEE80211_CHAN_2GHZ;
 833         if (txrate->flags & IEEE80211_RATE_ERP_G)
 834                 flags |= IEEE80211_CHAN_OFDM;
 835         else
 836                 flags |= IEEE80211_CHAN_CCK;
 837         hdr->rt_chbitmask = cpu_to_le16(flags);
 838
 839         skb->dev = hwsim_mon;
 840         skb_set_mac_header(skb, 0);
 841         skb->ip_summed = CHECKSUM_UNNECESSARY;
 842         skb->pkt_type = PACKET_OTHERHOST;
 843         skb->protocol = htons(ETH_P_802_2);
 844         memset(skb->cb, 0, sizeof(skb->cb));
 845         netif_rx(skb);
 846 }
 847
 848
 849 static void mac80211_hwsim_monitor_ack(struct ieee80211_channel *chan,
 850                                        const u8 *addr)
 851 {
 852         struct sk_buff *skb;
 853         struct hwsim_radiotap_ack_hdr *hdr;
 854         u16 flags;
 855         struct ieee80211_hdr *hdr11;
 856
 857         if (!netif_running(hwsim_mon))
 858                 return;
 859
 860         skb = dev_alloc_skb(100);
 861         if (skb == NULL)
 862                 return;
 863
 864         hdr = (struct hwsim_radiotap_ack_hdr *) skb_put(skb, sizeof(*hdr));
 865         hdr->hdr.it_version = PKTHDR_RADIOTAP_VERSION;
 866         hdr->hdr.it_pad = 0;
 867         hdr->hdr.it_len = cpu_to_le16(sizeof(*hdr));
 868         hdr->hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
 869                                           (1 << IEEE80211_RADIOTAP_CHANNEL));
 870         hdr->rt_flags = 0;
 871         hdr->pad = 0;
 872         hdr->rt_channel = cpu_to_le16(chan->center_freq);
 873         flags = IEEE80211_CHAN_2GHZ;
 874         hdr->rt_chbitmask = cpu_to_le16(flags);
 875
 876         hdr11 = (struct ieee80211_hdr *) skb_put(skb, 10);
 877         hdr11->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
 878                                            IEEE80211_STYPE_ACK);
 879         hdr11->duration_id = cpu_to_le16(0);
 880         memcpy(hdr11->addr1, addr, ETH_ALEN);
 881
 882         skb->dev = hwsim_mon;
 883         skb_set_mac_header(skb, 0);
 884         skb->ip_summed = CHECKSUM_UNNECESSARY;
 885         skb->pkt_type = PACKET_OTHERHOST;
 886         skb->protocol = htons(ETH_P_802_2);
 887         memset(skb->cb, 0, sizeof(skb->cb));
 888         netif_rx(skb);
 889 }
 890
 891 struct mac80211_hwsim_addr_match_data {
 892         u8 addr[ETH_ALEN];
 893         bool ret;
 894 };
 895
 896 static void mac80211_hwsim_addr_iter(void *data, u8 *mac,
 897                                      struct ieee80211_vif *vif)
 898 {
 899         struct mac80211_hwsim_addr_match_data *md = data;
 900
 901         if (memcmp(mac, md->addr, ETH_ALEN) == 0)
 902                 md->ret = true;
 903 }
 904
 905 static bool mac80211_hwsim_addr_match(struct mac80211_hwsim_data *data,
 906                                       const u8 *addr)
 907 {
 908         struct mac80211_hwsim_addr_match_data md = {
 909                 .ret = false,
 910         };
 911
 912         if (data->scanning && memcmp(addr, data->scan_addr, ETH_ALEN) == 0)
 913                 return true;
 914
 915         memcpy(md.addr, addr, ETH_ALEN);
 916
 917         ieee80211_iterate_active_interfaces_atomic(data->hw,
 918                                                    IEEE80211_IFACE_ITER_NORMAL,
 919                                                    mac80211_hwsim_addr_iter,
 920                                                    &md);
 921
 922         return md.ret;
 923 }
 924
 925 static bool hwsim_ps_rx_ok(struct mac80211_hwsim_data *data,
 926                            struct sk_buff *skb)
 927 {
 928         switch (data->ps) {
 929         case PS_DISABLED:
 930                 return true;
 931         case PS_ENABLED:
 932                 return false;
 933         case PS_AUTO_POLL:
 934                 /* TODO: accept (some) Beacons by default and other frames only
 935                  * if pending PS-Poll has been sent */
 936                 return true;
 937         case PS_MANUAL_POLL:
 938                 /* Allow unicast frames to own address if there is a pending
 939                  * PS-Poll */
 940                 if (data->ps_poll_pending &&
 941                     mac80211_hwsim_addr_match(data, skb->data + 4)) {
 942                         data->ps_poll_pending = false;
 943                         return true;
 944                 }
 945                 return false;
 946         }
 947
 948         return true;
 949 }
 950
 951 static void mac80211_hwsim_tx_frame_nl(struct ieee80211_hw *hw,
 952                                        struct sk_buff *my_skb,
 953                                        int dst_portid)
 954 {
 955         struct sk_buff *skb;
 956         struct mac80211_hwsim_data *data = hw->priv;
 957         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) my_skb->data;
 958         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(my_skb);
 959         void *msg_head;
 960         unsigned int hwsim_flags = 0;
 961         int i;
 962         struct hwsim_tx_rate tx_attempts[IEEE80211_TX_MAX_RATES];
 963
 964         if (data->ps != PS_DISABLED)
 965                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 966         /* If the queue contains MAX_QUEUE skb's drop some */
 967         if (skb_queue_len(&data->pending) >= MAX_QUEUE) {
 968                 /* Droping until WARN_QUEUE level */
 969                 while (skb_queue_len(&data->pending) >= WARN_QUEUE) {
 970                         ieee80211_free_txskb(hw, skb_dequeue(&data->pending));
 971                         data->tx_dropped++;
 972                 }
 973         }
 974
 975         skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_ATOMIC);
 976         if (skb == NULL)
 977                 goto nla_put_failure;
 978
 979         msg_head = genlmsg_put(skb, 0, 0, &hwsim_genl_family, 0,
 980                                HWSIM_CMD_FRAME);
 981         if (msg_head == NULL) {
 982                 printk(KERN_DEBUG "mac80211_hwsim: problem with msg_head\n");
 983                 goto nla_put_failure;
 984         }
 985
 986         if (nla_put(skb, HWSIM_ATTR_ADDR_TRANSMITTER, ETH_ALEN, hdr->addr2))
 987                 goto nla_put_failure;
 988
 989         /* We get the skb->data */
 990         if (nla_put(skb, HWSIM_ATTR_FRAME, my_skb->len, my_skb->data))
 991                 goto nla_put_failure;
 992
 993         /* We get the flags for this transmission, and we translate them to
 994            wmediumd flags  */
 995
 996         if (info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS)
 997                 hwsim_flags |= HWSIM_TX_CTL_REQ_TX_STATUS;
 998
 999         if (info->flags & IEEE80211_TX_CTL_NO_ACK)
1000                 hwsim_flags |= HWSIM_TX_CTL_NO_ACK;
1001
1002         if (nla_put_u32(skb, HWSIM_ATTR_FLAGS, hwsim_flags))
1003                 goto nla_put_failure;
1004
1005         if (nla_put_u32(skb, HWSIM_ATTR_FREQ, data->channel->center_freq))
1006                 goto nla_put_failure;
1007
1008         /* We get the tx control (rate and retries) info*/
1009
1010         for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
1011                 tx_attempts[i].idx = info->status.rates[i].idx;
1012                 tx_attempts[i].count = info->status.rates[i].count;
1013         }
1014
1015         if (nla_put(skb, HWSIM_ATTR_TX_INFO,
1016                     sizeof(struct hwsim_tx_rate)*IEEE80211_TX_MAX_RATES,
1017                     tx_attempts))
1018                 goto nla_put_failure;
1019
1020         /* We create a cookie to identify this skb */
1021         if (nla_put_u64(skb, HWSIM_ATTR_COOKIE, (unsigned long) my_skb))
1022                 goto nla_put_failure;
1023
1024         genlmsg_end(skb, msg_head);
1025         genlmsg_unicast(&init_net, skb, dst_portid);
1026
1027         /* Enqueue the packet */
1028         skb_queue_tail(&data->pending, my_skb);
1029         data->tx_pkts++;
1030         data->tx_bytes += my_skb->len;
1031         return;
1032
1033 nla_put_failure:
1034         printk(KERN_DEBUG "mac80211_hwsim: error occurred in %s\n", __func__);
1035         ieee80211_free_txskb(hw, my_skb);
1036         data->tx_failed++;
1037 }
1038
1039 static bool hwsim_chans_compat(struct ieee80211_channel *c1,
1040                                struct ieee80211_channel *c2)
1041 {
1042         if (!c1 || !c2)
1043                 return false;
1044
1045         return c1->center_freq == c2->center_freq;
1046 }
1047
1048 struct tx_iter_data {
1049         struct ieee80211_channel *channel;
1050         bool receive;
1051 };
1052
1053 static void mac80211_hwsim_tx_iter(void *_data, u8 *addr,
1054                                    struct ieee80211_vif *vif)
1055 {
1056         struct tx_iter_data *data = _data;
1057
1058         if (!vif->chanctx_conf)
1059                 return;
1060
1061         if (!hwsim_chans_compat(data->channel,
1062                                 rcu_dereference(vif->chanctx_conf)->def.chan))
1063                 return;
1064
1065         data->receive = true;
1066 }
1067
1068 static void mac80211_hwsim_add_vendor_rtap(struct sk_buff *skb)
1069 {
1070         /*
1071          * To enable this code, #define the HWSIM_RADIOTAP_OUI,
1072          * e.g. like this:
1073          * #define HWSIM_RADIOTAP_OUI "\x02\x00\x00"
1074          * (but you should use a valid OUI, not that)
1075          *
1076          * If anyone wants to 'donate' a radiotap OUI/subns code
1077          * please send a patch removing this #ifdef and changing
1078          * the values accordingly.
1079          */
1080 #ifdef HWSIM_RADIOTAP_OUI
1081         struct ieee80211_vendor_radiotap *rtap;
1082
1083         /*
1084          * Note that this code requires the headroom in the SKB
1085          * that was allocated earlier.
1086          */
1087         rtap = (void *)skb_push(skb, sizeof(*rtap) + 8 + 4);
1088         rtap->oui[0] = HWSIM_RADIOTAP_OUI[0];
1089         rtap->oui[1] = HWSIM_RADIOTAP_OUI[1];
1090         rtap->oui[2] = HWSIM_RADIOTAP_OUI[2];
1091         rtap->subns = 127;
1092
1093         /*
1094          * Radiotap vendor namespaces can (and should) also be
1095          * split into fields by using the standard radiotap
1096          * presence bitmap mechanism. Use just BIT(0) here for
1097          * the presence bitmap.
1098          */
1099         rtap->present = BIT(0);
1100         /* We have 8 bytes of (dummy) data */
1101         rtap->len = 8;
1102         /* For testing, also require it to be aligned */
1103         rtap->align = 8;
1104         /* And also test that padding works, 4 bytes */
1105         rtap->pad = 4;
1106         /* push the data */
1107         memcpy(rtap->data, "ABCDEFGH", 8);
1108         /* make sure to clear padding, mac80211 doesn't */
1109         memset(rtap->data + 8, 0, 4);
1110
1111         IEEE80211_SKB_RXCB(skb)->flag |= RX_FLAG_RADIOTAP_VENDOR_DATA;
1112 #endif
1113 }
1114
1115 static bool mac80211_hwsim_tx_frame_no_nl(struct ieee80211_hw *hw,
1116                                           struct sk_buff *skb,
1117                                           struct ieee80211_channel *chan)
1118 {
1119         struct mac80211_hwsim_data *data = hw->priv, *data2;
1120         bool ack = false;
1121         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1122         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1123         struct ieee80211_rx_status rx_status;
1124         u64 now;
1125
1126         memset(&rx_status, 0, sizeof(rx_status));
1127         rx_status.flag |= RX_FLAG_MACTIME_START;
1128         rx_status.freq = chan->center_freq;
1129         rx_status.band = chan->band;
1130         if (info->control.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) {
1131                 rx_status.rate_idx =
1132                         ieee80211_rate_get_vht_mcs(&info->control.rates[0]);
1133                 rx_status.vht_nss =
1134                         ieee80211_rate_get_vht_nss(&info->control.rates[0]);
1135                 rx_status.flag |= RX_FLAG_VHT;
1136         } else {
1137                 rx_status.rate_idx = info->control.rates[0].idx;
1138                 if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS)
1139                         rx_status.flag |= RX_FLAG_HT;
1140         }
1141         if (info->control.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
1142                 rx_status.flag |= RX_FLAG_40MHZ;
1143         if (info->control.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
1144                 rx_status.flag |= RX_FLAG_SHORT_GI;
1145         /* TODO: simulate real signal strength (and optional packet loss) */
1146         rx_status.signal = data->power_level - 50;
1147
1148         if (data->ps != PS_DISABLED)
1149                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1150
1151         /* release the skb's source info */
1152         skb_orphan(skb);
1153         skb_dst_drop(skb);
1154         skb->mark = 0;
1155         secpath_reset(skb);
1156         nf_reset(skb);
1157
1158         /*
1159          * Get absolute mactime here so all HWs RX at the "same time", and
1160          * absolute TX time for beacon mactime so the timestamp matches.
1161          * Giving beacons a different mactime than non-beacons looks messy, but
1162          * it helps the Toffset be exact and a ~10us mactime discrepancy
1163          * probably doesn't really matter.
1164          */
1165         if (ieee80211_is_beacon(hdr->frame_control) ||
1166             ieee80211_is_probe_resp(hdr->frame_control))
1167                 now = data->abs_bcn_ts;
1168         else
1169                 now = mac80211_hwsim_get_tsf_raw();
1170
1171         /* Copy skb to all enabled radios that are on the current frequency */
1172         spin_lock(&hwsim_radio_lock);
1173         list_for_each_entry(data2, &hwsim_radios, list) {
1174                 struct sk_buff *nskb;
1175                 struct tx_iter_data tx_iter_data = {
1176                         .receive = false,
1177                         .channel = chan,
1178                 };
1179
1180                 if (data == data2)
1181                         continue;
1182
1183                 if (!data2->started || (data2->idle && !data2->tmp_chan) ||
1184                     !hwsim_ps_rx_ok(data2, skb))
1185                         continue;
1186
1187                 if (!(data->group & data2->group))
1188                         continue;
1189
1190                 if (!hwsim_chans_compat(chan, data2->tmp_chan) &&
1191                     !hwsim_chans_compat(chan, data2->channel)) {
1192                         ieee80211_iterate_active_interfaces_atomic(
1193                                 data2->hw, IEEE80211_IFACE_ITER_NORMAL,
1194                                 mac80211_hwsim_tx_iter, &tx_iter_data);
1195                         if (!tx_iter_data.receive)
1196                                 continue;
1197                 }
1198
1199                 /*
1200                  * reserve some space for our vendor and the normal
1201                  * radiotap header, since we're copying anyway
1202                  */
1203                 if (skb->len < PAGE_SIZE && paged_rx) {
1204                         struct page *page = alloc_page(GFP_ATOMIC);
1205
1206                         if (!page)
1207                                 continue;
1208
1209                         nskb = dev_alloc_skb(128);
1210                         if (!nskb) {
1211                                 __free_page(page);
1212                                 continue;
1213                         }
1214
1215                         memcpy(page_address(page), skb->data, skb->len);
1216                         skb_add_rx_frag(nskb, 0, page, 0, skb->len, skb->len);
1217                 } else {
1218                         nskb = skb_copy(skb, GFP_ATOMIC);
1219                         if (!nskb)
1220                                 continue;
1221                 }
1222
1223                 if (mac80211_hwsim_addr_match(data2, hdr->addr1))
1224                         ack = true;
1225
1226                 rx_status.mactime = now + data2->tsf_offset;
1227
1228                 memcpy(IEEE80211_SKB_RXCB(nskb), &rx_status, sizeof(rx_status));
1229
1230                 mac80211_hwsim_add_vendor_rtap(nskb);
1231
1232                 data2->rx_pkts++;
1233                 data2->rx_bytes += nskb->len;
1234                 ieee80211_rx_irqsafe(data2->hw, nskb);
1235         }
1236         spin_unlock(&hwsim_radio_lock);
1237
1238         return ack;
1239 }
1240
1241 static void mac80211_hwsim_tx(struct ieee80211_hw *hw,
1242                               struct ieee80211_tx_control *control,
1243                               struct sk_buff *skb)
1244 {
1245         struct mac80211_hwsim_data *data = hw->priv;
1246         struct ieee80211_tx_info *txi = IEEE80211_SKB_CB(skb);
1247         struct ieee80211_chanctx_conf *chanctx_conf;
1248         struct ieee80211_channel *channel;
1249         bool ack;
1250         u32 _portid;
1251
1252         if (WARN_ON(skb->len < 10)) {
1253                 /* Should not happen; just a sanity check for addr1 use */
1254                 ieee80211_free_txskb(hw, skb);
1255                 return;
1256         }
1257
1258         if (!data->use_chanctx) {
1259                 channel = data->channel;
1260         } else if (txi->hw_queue == 4) {
1261                 channel = data->tmp_chan;
1262         } else {
1263                 chanctx_conf = rcu_dereference(txi->control.vif->chanctx_conf);
1264                 if (chanctx_conf)
1265                         channel = chanctx_conf->def.chan;
1266                 else
1267                         channel = NULL;
1268         }
1269
1270         if (WARN(!channel, "TX w/o channel - queue = %d\n", txi->hw_queue)) {
1271                 ieee80211_free_txskb(hw, skb);
1272                 return;
1273         }
1274
1275         if (data->idle && !data->tmp_chan) {
1276                 wiphy_debug(hw->wiphy, "Trying to TX when idle - reject\n");
1277                 ieee80211_free_txskb(hw, skb);
1278                 return;
1279         }
1280
1281         if (txi->control.vif)
1282                 hwsim_check_magic(txi->control.vif);
1283         if (control->sta)
1284                 hwsim_check_sta_magic(control->sta);
1285
1286         if (hw->flags & IEEE80211_HW_SUPPORTS_RC_TABLE)
1287                 ieee80211_get_tx_rates(txi->control.vif, control->sta, skb,
1288                                        txi->control.rates,
1289                                        ARRAY_SIZE(txi->control.rates));
1290
1291         txi->rate_driver_data[0] = channel;
1292         mac80211_hwsim_monitor_rx(hw, skb, channel);
1293
1294         /* wmediumd mode check */
1295         _portid = ACCESS_ONCE(wmediumd_portid);
1296
1297         if (_portid)
1298                 return mac80211_hwsim_tx_frame_nl(hw, skb, _portid);
1299
1300         /* NO wmediumd detected, perfect medium simulation */
1301         data->tx_pkts++;
1302         data->tx_bytes += skb->len;
1303         ack = mac80211_hwsim_tx_frame_no_nl(hw, skb, channel);
1304
1305         if (ack && skb->len >= 16) {
1306                 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1307                 mac80211_hwsim_monitor_ack(channel, hdr->addr2);
1308         }
1309
1310         ieee80211_tx_info_clear_status(txi);
1311
1312         /* frame was transmitted at most favorable rate at first attempt */
1313         txi->control.rates[0].count = 1;
1314         txi->control.rates[1].idx = -1;
1315
1316         if (!(txi->flags & IEEE80211_TX_CTL_NO_ACK) && ack)
1317                 txi->flags |= IEEE80211_TX_STAT_ACK;
1318         ieee80211_tx_status_irqsafe(hw, skb);
1319 }
1320
1321
1322 static int mac80211_hwsim_start(struct ieee80211_hw *hw)
1323 {
1324         struct mac80211_hwsim_data *data = hw->priv;
1325         wiphy_debug(hw->wiphy, "%s\n", __func__);
1326         data->started = true;
1327         return 0;
1328 }
1329
1330
1331 static void mac80211_hwsim_stop(struct ieee80211_hw *hw)
1332 {
1333         struct mac80211_hwsim_data *data = hw->priv;
1334         data->started = false;
1335         tasklet_hrtimer_cancel(&data->beacon_timer);
1336         wiphy_debug(hw->wiphy, "%s\n", __func__);
1337 }
1338
1339
1340 static int mac80211_hwsim_add_interface(struct ieee80211_hw *hw,
1341                                         struct ieee80211_vif *vif)
1342 {
1343         wiphy_debug(hw->wiphy, "%s (type=%d mac_addr=%pM)\n",
1344                     __func__, ieee80211_vif_type_p2p(vif),
1345                     vif->addr);
1346         hwsim_set_magic(vif);
1347
1348         vif->cab_queue = 0;
1349         vif->hw_queue[IEEE80211_AC_VO] = 0;
1350         vif->hw_queue[IEEE80211_AC_VI] = 1;
1351         vif->hw_queue[IEEE80211_AC_BE] = 2;
1352         vif->hw_queue[IEEE80211_AC_BK] = 3;
1353
1354         return 0;
1355 }
1356
1357
1358 static int mac80211_hwsim_change_interface(struct ieee80211_hw *hw,
1359                                            struct ieee80211_vif *vif,
1360                                            enum nl80211_iftype newtype,
1361                                            bool newp2p)
1362 {
1363         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1364         wiphy_debug(hw->wiphy,
1365                     "%s (old type=%d, new type=%d, mac_addr=%pM)\n",
1366                     __func__, ieee80211_vif_type_p2p(vif),
1367                     newtype, vif->addr);
1368         hwsim_check_magic(vif);
1369
1370         /*
1371          * interface may change from non-AP to AP in
1372          * which case this needs to be set up again
1373          */
1374         vif->cab_queue = 0;
1375
1376         return 0;
1377 }
1378
1379 static void mac80211_hwsim_remove_interface(
1380         struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1381 {
1382         wiphy_debug(hw->wiphy, "%s (type=%d mac_addr=%pM)\n",
1383                     __func__, ieee80211_vif_type_p2p(vif),
1384                     vif->addr);
1385         hwsim_check_magic(vif);
1386         hwsim_clear_magic(vif);
1387 }
1388
1389 static void mac80211_hwsim_tx_frame(struct ieee80211_hw *hw,
1390                                     struct sk_buff *skb,
1391                                     struct ieee80211_channel *chan)
1392 {
1393         u32 _pid = ACCESS_ONCE(wmediumd_portid);
1394
1395         if (hw->flags & IEEE80211_HW_SUPPORTS_RC_TABLE) {
1396                 struct ieee80211_tx_info *txi = IEEE80211_SKB_CB(skb);
1397                 ieee80211_get_tx_rates(txi->control.vif, NULL, skb,
1398                                        txi->control.rates,
1399                                        ARRAY_SIZE(txi->control.rates));
1400         }
1401
1402         mac80211_hwsim_monitor_rx(hw, skb, chan);
1403
1404         if (_pid)
1405                 return mac80211_hwsim_tx_frame_nl(hw, skb, _pid);
1406
1407         mac80211_hwsim_tx_frame_no_nl(hw, skb, chan);
1408         dev_kfree_skb(skb);
1409 }
1410
1411 static void mac80211_hwsim_beacon_tx(void *arg, u8 *mac,
1412                                      struct ieee80211_vif *vif)
1413 {
1414         struct mac80211_hwsim_data *data = arg;
1415         struct ieee80211_hw *hw = data->hw;
1416         struct ieee80211_tx_info *info;
1417         struct ieee80211_rate *txrate;
1418         struct ieee80211_mgmt *mgmt;
1419         struct sk_buff *skb;
1420
1421         hwsim_check_magic(vif);
1422
1423         if (vif->type != NL80211_IFTYPE_AP &&
1424             vif->type != NL80211_IFTYPE_MESH_POINT &&
1425             vif->type != NL80211_IFTYPE_ADHOC)
1426                 return;
1427
1428         skb = ieee80211_beacon_get(hw, vif);
1429         if (skb == NULL)
1430                 return;
1431         info = IEEE80211_SKB_CB(skb);
1432         if (hw->flags & IEEE80211_HW_SUPPORTS_RC_TABLE)
1433                 ieee80211_get_tx_rates(vif, NULL, skb,
1434                                        info->control.rates,
1435                                        ARRAY_SIZE(info->control.rates));
1436
1437         txrate = ieee80211_get_tx_rate(hw, info);
1438
1439         mgmt = (struct ieee80211_mgmt *) skb->data;
1440         /* fake header transmission time */
1441         data->abs_bcn_ts = mac80211_hwsim_get_tsf_raw();
1442         mgmt->u.beacon.timestamp = cpu_to_le64(data->abs_bcn_ts +
1443                                                data->tsf_offset +
1444                                                24 * 8 * 10 / txrate->bitrate);
1445
1446         mac80211_hwsim_tx_frame(hw, skb,
1447                                 rcu_dereference(vif->chanctx_conf)->def.chan);
1448
1449         if (vif->csa_active && ieee80211_csa_is_complete(vif))
1450                 ieee80211_csa_finish(vif);
1451 }
1452
1453 static enum hrtimer_restart
1454 mac80211_hwsim_beacon(struct hrtimer *timer)
1455 {
1456         struct mac80211_hwsim_data *data =
1457                 container_of(timer, struct mac80211_hwsim_data,
1458                              beacon_timer.timer);
1459         struct ieee80211_hw *hw = data->hw;
1460         u64 bcn_int = data->beacon_int;
1461         ktime_t next_bcn;
1462
1463         if (!data->started)
1464                 goto out;
1465
1466         ieee80211_iterate_active_interfaces_atomic(
1467                 hw, IEEE80211_IFACE_ITER_NORMAL,
1468                 mac80211_hwsim_beacon_tx, data);
1469
1470         /* beacon at new TBTT + beacon interval */
1471         if (data->bcn_delta) {
1472                 bcn_int -= data->bcn_delta;
1473                 data->bcn_delta = 0;
1474         }
1475
1476         next_bcn = ktime_add(hrtimer_get_expires(timer),
1477                              ns_to_ktime(bcn_int * 1000));
1478         tasklet_hrtimer_start(&data->beacon_timer, next_bcn, HRTIMER_MODE_ABS);
1479 out:
1480         return HRTIMER_NORESTART;
1481 }
1482
1483 static const char * const hwsim_chanwidths[] = {
1484         [NL80211_CHAN_WIDTH_20_NOHT] = "noht",
1485         [NL80211_CHAN_WIDTH_20] = "ht20",
1486         [NL80211_CHAN_WIDTH_40] = "ht40",
1487         [NL80211_CHAN_WIDTH_80] = "vht80",
1488         [NL80211_CHAN_WIDTH_80P80] = "vht80p80",
1489         [NL80211_CHAN_WIDTH_160] = "vht160",
1490 };
1491
1492 static int mac80211_hwsim_config(struct ieee80211_hw *hw, u32 changed)
1493 {
1494         struct mac80211_hwsim_data *data = hw->priv;
1495         struct ieee80211_conf *conf = &hw->conf;
1496         static const char *smps_modes[IEEE80211_SMPS_NUM_MODES] = {
1497                 [IEEE80211_SMPS_AUTOMATIC] = "auto",
1498                 [IEEE80211_SMPS_OFF] = "off",
1499                 [IEEE80211_SMPS_STATIC] = "static",
1500                 [IEEE80211_SMPS_DYNAMIC] = "dynamic",
1501         };
1502
1503         if (conf->chandef.chan)
1504                 wiphy_debug(hw->wiphy,
1505                             "%s (freq=%d(%d - %d)/%s idle=%d ps=%d smps=%s)\n",
1506                             __func__,
1507                             conf->chandef.chan->center_freq,
1508                             conf->chandef.center_freq1,
1509                             conf->chandef.center_freq2,
1510                             hwsim_chanwidths[conf->chandef.width],
1511                             !!(conf->flags & IEEE80211_CONF_IDLE),
1512                             !!(conf->flags & IEEE80211_CONF_PS),
1513                             smps_modes[conf->smps_mode]);
1514         else
1515                 wiphy_debug(hw->wiphy,
1516                             "%s (freq=0 idle=%d ps=%d smps=%s)\n",
1517                             __func__,
1518                             !!(conf->flags & IEEE80211_CONF_IDLE),
1519                             !!(conf->flags & IEEE80211_CONF_PS),
1520                             smps_modes[conf->smps_mode]);
1521
1522         data->idle = !!(conf->flags & IEEE80211_CONF_IDLE);
1523
1524         data->channel = conf->chandef.chan;
1525
1526         WARN_ON(data->channel && data->use_chanctx);
1527
1528         data->power_level = conf->power_level;
1529         if (!data->started || !data->beacon_int)
1530                 tasklet_hrtimer_cancel(&data->beacon_timer);
1531         else if (!hrtimer_is_queued(&data->beacon_timer.timer)) {
1532                 u64 tsf = mac80211_hwsim_get_tsf(hw, NULL);
1533                 u32 bcn_int = data->beacon_int;
1534                 u64 until_tbtt = bcn_int - do_div(tsf, bcn_int);
1535
1536                 tasklet_hrtimer_start(&data->beacon_timer,
1537                                       ns_to_ktime(until_tbtt * 1000),
1538                                       HRTIMER_MODE_REL);
1539         }
1540
1541         return 0;
1542 }
1543
1544
1545 static void mac80211_hwsim_configure_filter(struct ieee80211_hw *hw,
1546                                             unsigned int changed_flags,
1547                                             unsigned int *total_flags,u64 multicast)
1548 {
1549         struct mac80211_hwsim_data *data = hw->priv;
1550
1551         wiphy_debug(hw->wiphy, "%s\n", __func__);
1552
1553         data->rx_filter = 0;
1554         if (*total_flags & FIF_PROMISC_IN_BSS)
1555                 data->rx_filter |= FIF_PROMISC_IN_BSS;
1556         if (*total_flags & FIF_ALLMULTI)
1557                 data->rx_filter |= FIF_ALLMULTI;
1558
1559         *total_flags = data->rx_filter;
1560 }
1561
1562 static void mac80211_hwsim_bcn_en_iter(void *data, u8 *mac,
1563                                        struct ieee80211_vif *vif)
1564 {
1565         unsigned int *count = data;
1566         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
1567
1568         if (vp->bcn_en)
1569                 (*count)++;
1570 }
1571
1572 static void mac80211_hwsim_bss_info_changed(struct ieee80211_hw *hw,
1573                                             struct ieee80211_vif *vif,
1574                                             struct ieee80211_bss_conf *info,
1575                                             u32 changed)
1576 {
1577         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
1578         struct mac80211_hwsim_data *data = hw->priv;
1579
1580         hwsim_check_magic(vif);
1581
1582         wiphy_debug(hw->wiphy, "%s(changed=0x%x vif->addr=%pM)\n",
1583                     __func__, changed, vif->addr);
1584
1585         if (changed & BSS_CHANGED_BSSID) {
1586                 wiphy_debug(hw->wiphy, "%s: BSSID changed: %pM\n",
1587                             __func__, info->bssid);
1588                 memcpy(vp->bssid, info->bssid, ETH_ALEN);
1589         }
1590
1591         if (changed & BSS_CHANGED_ASSOC) {
1592                 wiphy_debug(hw->wiphy, "  ASSOC: assoc=%d aid=%d\n",
1593                             info->assoc, info->aid);
1594                 vp->assoc = info->assoc;
1595                 vp->aid = info->aid;
1596         }
1597
1598         if (changed & BSS_CHANGED_BEACON_ENABLED) {
1599                 wiphy_debug(hw->wiphy, "  BCN EN: %d (BI=%u)\n",
1600                             info->enable_beacon, info->beacon_int);
1601                 vp->bcn_en = info->enable_beacon;
1602                 if (data->started &&
1603                     !hrtimer_is_queued(&data->beacon_timer.timer) &&
1604                     info->enable_beacon) {
1605                         u64 tsf, until_tbtt;
1606                         u32 bcn_int;
1607                         data->beacon_int = info->beacon_int * 1024;
1608                         tsf = mac80211_hwsim_get_tsf(hw, vif);
1609                         bcn_int = data->beacon_int;
1610                         until_tbtt = bcn_int - do_div(tsf, bcn_int);
1611                         tasklet_hrtimer_start(&data->beacon_timer,
1612                                               ns_to_ktime(until_tbtt * 1000),
1613                                               HRTIMER_MODE_REL);
1614                 } else if (!info->enable_beacon) {
1615                         unsigned int count = 0;
1616                         ieee80211_iterate_active_interfaces_atomic(
1617                                 data->hw, IEEE80211_IFACE_ITER_NORMAL,
1618                                 mac80211_hwsim_bcn_en_iter, &count);
1619                         wiphy_debug(hw->wiphy, "  beaconing vifs remaining: %u",
1620                                     count);
1621                         if (count == 0) {
1622                                 tasklet_hrtimer_cancel(&data->beacon_timer);
1623                                 data->beacon_int = 0;
1624                         }
1625                 }
1626         }
1627
1628         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1629                 wiphy_debug(hw->wiphy, "  ERP_CTS_PROT: %d\n",
1630                             info->use_cts_prot);
1631         }
1632
1633         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1634                 wiphy_debug(hw->wiphy, "  ERP_PREAMBLE: %d\n",
1635                             info->use_short_preamble);
1636         }
1637
1638         if (changed & BSS_CHANGED_ERP_SLOT) {
1639                 wiphy_debug(hw->wiphy, "  ERP_SLOT: %d\n", info->use_short_slot);
1640         }
1641
1642         if (changed & BSS_CHANGED_HT) {
1643                 wiphy_debug(hw->wiphy, "  HT: op_mode=0x%x\n",
1644                             info->ht_operation_mode);
1645         }
1646
1647         if (changed & BSS_CHANGED_BASIC_RATES) {
1648                 wiphy_debug(hw->wiphy, "  BASIC_RATES: 0x%llx\n",
1649                             (unsigned long long) info->basic_rates);
1650         }
1651
1652         if (changed & BSS_CHANGED_TXPOWER)
1653                 wiphy_debug(hw->wiphy, "  TX Power: %d dBm\n", info->txpower);
1654 }
1655
1656 static int mac80211_hwsim_sta_add(struct ieee80211_hw *hw,
1657                                   struct ieee80211_vif *vif,
1658                                   struct ieee80211_sta *sta)
1659 {
1660         hwsim_check_magic(vif);
1661         hwsim_set_sta_magic(sta);
1662
1663         return 0;
1664 }
1665
1666 static int mac80211_hwsim_sta_remove(struct ieee80211_hw *hw,
1667                                      struct ieee80211_vif *vif,
1668                                      struct ieee80211_sta *sta)
1669 {
1670         hwsim_check_magic(vif);
1671         hwsim_clear_sta_magic(sta);
1672
1673         return 0;
1674 }
1675
1676 static void mac80211_hwsim_sta_notify(struct ieee80211_hw *hw,
1677                                       struct ieee80211_vif *vif,
1678                                       enum sta_notify_cmd cmd,
1679                                       struct ieee80211_sta *sta)
1680 {
1681         hwsim_check_magic(vif);
1682
1683         switch (cmd) {
1684         case STA_NOTIFY_SLEEP:
1685         case STA_NOTIFY_AWAKE:
1686                 /* TODO: make good use of these flags */
1687                 break;
1688         default:
1689                 WARN(1, "Invalid sta notify: %d\n", cmd);
1690                 break;
1691         }
1692 }
1693
1694 static int mac80211_hwsim_set_tim(struct ieee80211_hw *hw,
1695                                   struct ieee80211_sta *sta,
1696                                   bool set)
1697 {
1698         hwsim_check_sta_magic(sta);
1699         return 0;
1700 }
1701
1702 static int mac80211_hwsim_conf_tx(
1703         struct ieee80211_hw *hw,
1704         struct ieee80211_vif *vif, u16 queue,
1705         const struct ieee80211_tx_queue_params *params)
1706 {
1707         wiphy_debug(hw->wiphy,
1708                     "%s (queue=%d txop=%d cw_min=%d cw_max=%d aifs=%d)\n",
1709                     __func__, queue,
1710                     params->txop, params->cw_min,
1711                     params->cw_max, params->aifs);
1712         return 0;
1713 }
1714
1715 static int mac80211_hwsim_get_survey(
1716         struct ieee80211_hw *hw, int idx,
1717         struct survey_info *survey)
1718 {
1719         struct ieee80211_conf *conf = &hw->conf;
1720
1721         wiphy_debug(hw->wiphy, "%s (idx=%d)\n", __func__, idx);
1722
1723         if (idx != 0)
1724                 return -ENOENT;
1725
1726         /* Current channel */
1727         survey->channel = conf->chandef.chan;
1728
1729         /*
1730          * Magically conjured noise level --- this is only ok for simulated hardware.
1731          *
1732          * A real driver which cannot determine the real channel noise MUST NOT
1733          * report any noise, especially not a magically conjured one :-)
1734          */
1735         survey->filled = SURVEY_INFO_NOISE_DBM;
1736         survey->noise = -92;
1737
1738         return 0;
1739 }
1740
1741 #ifdef CONFIG_NL80211_TESTMODE
1742 /*
1743  * This section contains example code for using netlink
1744  * attributes with the testmode command in nl80211.
1745  */
1746
1747 /* These enums need to be kept in sync with userspace */
1748 enum hwsim_testmode_attr {
1749         __HWSIM_TM_ATTR_INVALID = 0,
1750         HWSIM_TM_ATTR_CMD       = 1,
1751         HWSIM_TM_ATTR_PS        = 2,
1752
1753         /* keep last */
1754         __HWSIM_TM_ATTR_AFTER_LAST,
1755         HWSIM_TM_ATTR_MAX       = __HWSIM_TM_ATTR_AFTER_LAST - 1
1756 };
1757
1758 enum hwsim_testmode_cmd {
1759         HWSIM_TM_CMD_SET_PS             = 0,
1760         HWSIM_TM_CMD_GET_PS             = 1,
1761         HWSIM_TM_CMD_STOP_QUEUES        = 2,
1762         HWSIM_TM_CMD_WAKE_QUEUES        = 3,
1763 };
1764
1765 static const struct nla_policy hwsim_testmode_policy[HWSIM_TM_ATTR_MAX + 1] = {
1766         [HWSIM_TM_ATTR_CMD] = { .type = NLA_U32 },
1767         [HWSIM_TM_ATTR_PS] = { .type = NLA_U32 },
1768 };
1769
1770 static int mac80211_hwsim_testmode_cmd(struct ieee80211_hw *hw,
1771                                        struct ieee80211_vif *vif,
1772                                        void *data, int len)
1773 {
1774         struct mac80211_hwsim_data *hwsim = hw->priv;
1775         struct nlattr *tb[HWSIM_TM_ATTR_MAX + 1];
1776         struct sk_buff *skb;
1777         int err, ps;
1778
1779         err = nla_parse(tb, HWSIM_TM_ATTR_MAX, data, len,
1780                         hwsim_testmode_policy);
1781         if (err)
1782                 return err;
1783
1784         if (!tb[HWSIM_TM_ATTR_CMD])
1785                 return -EINVAL;
1786
1787         switch (nla_get_u32(tb[HWSIM_TM_ATTR_CMD])) {
1788         case HWSIM_TM_CMD_SET_PS:
1789                 if (!tb[HWSIM_TM_ATTR_PS])
1790                         return -EINVAL;
1791                 ps = nla_get_u32(tb[HWSIM_TM_ATTR_PS]);
1792                 return hwsim_fops_ps_write(hwsim, ps);
1793         case HWSIM_TM_CMD_GET_PS:
1794                 skb = cfg80211_testmode_alloc_reply_skb(hw->wiphy,
1795                                                 nla_total_size(sizeof(u32)));
1796                 if (!skb)
1797                         return -ENOMEM;
1798                 if (nla_put_u32(skb, HWSIM_TM_ATTR_PS, hwsim->ps))
1799                         goto nla_put_failure;
1800                 return cfg80211_testmode_reply(skb);
1801         case HWSIM_TM_CMD_STOP_QUEUES:
1802                 ieee80211_stop_queues(hw);
1803                 return 0;
1804         case HWSIM_TM_CMD_WAKE_QUEUES:
1805                 ieee80211_wake_queues(hw);
1806                 return 0;
1807         default:
1808                 return -EOPNOTSUPP;
1809         }
1810
1811  nla_put_failure:
1812         kfree_skb(skb);
1813         return -ENOBUFS;
1814 }
1815 #endif
1816
1817 static int mac80211_hwsim_ampdu_action(struct ieee80211_hw *hw,
1818                                        struct ieee80211_vif *vif,
1819                                        enum ieee80211_ampdu_mlme_action action,
1820                                        struct ieee80211_sta *sta, u16 tid, u16 *ssn,
1821                                        u8 buf_size)
1822 {
1823         switch (action) {
1824         case IEEE80211_AMPDU_TX_START:
1825                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1826                 break;
1827         case IEEE80211_AMPDU_TX_STOP_CONT:
1828         case IEEE80211_AMPDU_TX_STOP_FLUSH:
1829         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
1830                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1831                 break;
1832         case IEEE80211_AMPDU_TX_OPERATIONAL:
1833                 break;
1834         case IEEE80211_AMPDU_RX_START:
1835         case IEEE80211_AMPDU_RX_STOP:
1836                 break;
1837         default:
1838                 return -EOPNOTSUPP;
1839         }
1840
1841         return 0;
1842 }
1843
1844 static void mac80211_hwsim_flush(struct ieee80211_hw *hw,
1845                                  struct ieee80211_vif *vif,
1846                                  u32 queues, bool drop)
1847 {
1848         /* Not implemented, queues only on kernel side */
1849 }
1850
1851 static void hw_scan_work(struct work_struct *work)
1852 {
1853         struct mac80211_hwsim_data *hwsim =
1854                 container_of(work, struct mac80211_hwsim_data, hw_scan.work);
1855         struct cfg80211_scan_request *req = hwsim->hw_scan_request;
1856         int dwell, i;
1857
1858         mutex_lock(&hwsim->mutex);
1859         if (hwsim->scan_chan_idx >= req->n_channels) {
1860                 wiphy_debug(hwsim->hw->wiphy, "hw scan complete\n");
1861                 ieee80211_scan_completed(hwsim->hw, false);
1862                 hwsim->hw_scan_request = NULL;
1863                 hwsim->hw_scan_vif = NULL;
1864                 hwsim->tmp_chan = NULL;
1865                 mutex_unlock(&hwsim->mutex);
1866                 return;
1867         }
1868
1869         wiphy_debug(hwsim->hw->wiphy, "hw scan %d MHz\n",
1870                     req->channels[hwsim->scan_chan_idx]->center_freq);
1871
1872         hwsim->tmp_chan = req->channels[hwsim->scan_chan_idx];
1873         if (hwsim->tmp_chan->flags & IEEE80211_CHAN_NO_IR ||
1874             !req->n_ssids) {
1875                 dwell = 120;
1876         } else {
1877                 dwell = 30;
1878                 /* send probes */
1879                 for (i = 0; i < req->n_ssids; i++) {
1880                         struct sk_buff *probe;
1881
1882                         probe = ieee80211_probereq_get(hwsim->hw,
1883                                                        hwsim->scan_addr,
1884                                                        req->ssids[i].ssid,
1885                                                        req->ssids[i].ssid_len,
1886                                                        req->ie_len);
1887                         if (!probe)
1888                                 continue;
1889
1890                         if (req->ie_len)
1891                                 memcpy(skb_put(probe, req->ie_len), req->ie,
1892                                        req->ie_len);
1893
1894                         local_bh_disable();
1895                         mac80211_hwsim_tx_frame(hwsim->hw, probe,
1896                                                 hwsim->tmp_chan);
1897                         local_bh_enable();
1898                 }
1899         }
1900         ieee80211_queue_delayed_work(hwsim->hw, &hwsim->hw_scan,
1901                                      msecs_to_jiffies(dwell));
1902         hwsim->scan_chan_idx++;
1903         mutex_unlock(&hwsim->mutex);
1904 }
1905
1906 static int mac80211_hwsim_hw_scan(struct ieee80211_hw *hw,
1907                                   struct ieee80211_vif *vif,
1908                                   struct ieee80211_scan_request *hw_req)
1909 {
1910         struct mac80211_hwsim_data *hwsim = hw->priv;
1911         struct cfg80211_scan_request *req = &hw_req->req;
1912
1913         mutex_lock(&hwsim->mutex);
1914         if (WARN_ON(hwsim->tmp_chan || hwsim->hw_scan_request)) {
1915                 mutex_unlock(&hwsim->mutex);
1916                 return -EBUSY;
1917         }
1918         hwsim->hw_scan_request = req;
1919         hwsim->hw_scan_vif = vif;
1920         hwsim->scan_chan_idx = 0;
1921         if (req->flags & NL80211_SCAN_FLAG_RANDOM_ADDR)
1922                 get_random_mask_addr(hwsim->scan_addr,
1923                                      hw_req->req.mac_addr,
1924                                      hw_req->req.mac_addr_mask);
1925         else
1926                 memcpy(hwsim->scan_addr, vif->addr, ETH_ALEN);
1927         mutex_unlock(&hwsim->mutex);
1928
1929         wiphy_debug(hw->wiphy, "hwsim hw_scan request\n");
1930
1931         ieee80211_queue_delayed_work(hwsim->hw, &hwsim->hw_scan, 0);
1932
1933         return 0;
1934 }
1935
1936 static void mac80211_hwsim_cancel_hw_scan(struct ieee80211_hw *hw,
1937                                           struct ieee80211_vif *vif)
1938 {
1939         struct mac80211_hwsim_data *hwsim = hw->priv;
1940
1941         wiphy_debug(hw->wiphy, "hwsim cancel_hw_scan\n");
1942
1943         cancel_delayed_work_sync(&hwsim->hw_scan);
1944
1945         mutex_lock(&hwsim->mutex);
1946         ieee80211_scan_completed(hwsim->hw, true);
1947         hwsim->tmp_chan = NULL;
1948         hwsim->hw_scan_request = NULL;
1949         hwsim->hw_scan_vif = NULL;
1950         mutex_unlock(&hwsim->mutex);
1951 }
1952
1953 static void mac80211_hwsim_sw_scan(struct ieee80211_hw *hw,
1954                                    struct ieee80211_vif *vif,
1955                                    const u8 *mac_addr)
1956 {
1957         struct mac80211_hwsim_data *hwsim = hw->priv;
1958
1959         mutex_lock(&hwsim->mutex);
1960
1961         if (hwsim->scanning) {
1962                 printk(KERN_DEBUG "two hwsim sw_scans detected!\n");
1963                 goto out;
1964         }
1965
1966         printk(KERN_DEBUG "hwsim sw_scan request, prepping stuff\n");
1967
1968         memcpy(hwsim->scan_addr, mac_addr, ETH_ALEN);
1969         hwsim->scanning = true;
1970
1971 out:
1972         mutex_unlock(&hwsim->mutex);
1973 }
1974
1975 static void mac80211_hwsim_sw_scan_complete(struct ieee80211_hw *hw,
1976                                             struct ieee80211_vif *vif)
1977 {
1978         struct mac80211_hwsim_data *hwsim = hw->priv;
1979
1980         mutex_lock(&hwsim->mutex);
1981
1982         printk(KERN_DEBUG "hwsim sw_scan_complete\n");
1983         hwsim->scanning = false;
1984         memset(hwsim->scan_addr, 0, ETH_ALEN);
1985
1986         mutex_unlock(&hwsim->mutex);
1987 }
1988
1989 static void hw_roc_done(struct work_struct *work)
1990 {
1991         struct mac80211_hwsim_data *hwsim =
1992                 container_of(work, struct mac80211_hwsim_data, roc_done.work);
1993
1994         mutex_lock(&hwsim->mutex);
1995         ieee80211_remain_on_channel_expired(hwsim->hw);
1996         hwsim->tmp_chan = NULL;
1997         mutex_unlock(&hwsim->mutex);
1998
1999         wiphy_debug(hwsim->hw->wiphy, "hwsim ROC expired\n");
2000 }
2001
2002 static int mac80211_hwsim_roc(struct ieee80211_hw *hw,
2003                               struct ieee80211_vif *vif,
2004                               struct ieee80211_channel *chan,
2005                               int duration,
2006                               enum ieee80211_roc_type type)
2007 {
2008         struct mac80211_hwsim_data *hwsim = hw->priv;
2009
2010         mutex_lock(&hwsim->mutex);
2011         if (WARN_ON(hwsim->tmp_chan || hwsim->hw_scan_request)) {
2012                 mutex_unlock(&hwsim->mutex);
2013                 return -EBUSY;
2014         }
2015
2016         hwsim->tmp_chan = chan;
2017         mutex_unlock(&hwsim->mutex);
2018
2019         wiphy_debug(hw->wiphy, "hwsim ROC (%d MHz, %d ms)\n",
2020                     chan->center_freq, duration);
2021
2022         ieee80211_ready_on_channel(hw);
2023
2024         ieee80211_queue_delayed_work(hw, &hwsim->roc_done,
2025                                      msecs_to_jiffies(duration));
2026         return 0;
2027 }
2028
2029 static int mac80211_hwsim_croc(struct ieee80211_hw *hw)
2030 {
2031         struct mac80211_hwsim_data *hwsim = hw->priv;
2032
2033         cancel_delayed_work_sync(&hwsim->roc_done);
2034
2035         mutex_lock(&hwsim->mutex);
2036         hwsim->tmp_chan = NULL;
2037         mutex_unlock(&hwsim->mutex);
2038
2039         wiphy_debug(hw->wiphy, "hwsim ROC canceled\n");
2040
2041         return 0;
2042 }
2043
2044 static int mac80211_hwsim_add_chanctx(struct ieee80211_hw *hw,
2045                                       struct ieee80211_chanctx_conf *ctx)
2046 {
2047         hwsim_set_chanctx_magic(ctx);
2048         wiphy_debug(hw->wiphy,
2049                     "add channel context control: %d MHz/width: %d/cfreqs:%d/%d MHz\n",
2050                     ctx->def.chan->center_freq, ctx->def.width,
2051                     ctx->def.center_freq1, ctx->def.center_freq2);
2052         return 0;
2053 }
2054
2055 static void mac80211_hwsim_remove_chanctx(struct ieee80211_hw *hw,
2056                                           struct ieee80211_chanctx_conf *ctx)
2057 {
2058         wiphy_debug(hw->wiphy,
2059                     "remove channel context control: %d MHz/width: %d/cfreqs:%d/%d MHz\n",
2060                     ctx->def.chan->center_freq, ctx->def.width,
2061                     ctx->def.center_freq1, ctx->def.center_freq2);
2062         hwsim_check_chanctx_magic(ctx);
2063         hwsim_clear_chanctx_magic(ctx);
2064 }
2065
2066 static void mac80211_hwsim_change_chanctx(struct ieee80211_hw *hw,
2067                                           struct ieee80211_chanctx_conf *ctx,
2068                                           u32 changed)
2069 {
2070         hwsim_check_chanctx_magic(ctx);
2071         wiphy_debug(hw->wiphy,
2072                     "change channel context control: %d MHz/width: %d/cfreqs:%d/%d MHz\n",
2073                     ctx->def.chan->center_freq, ctx->def.width,
2074                     ctx->def.center_freq1, ctx->def.center_freq2);
2075 }
2076
2077 static int mac80211_hwsim_assign_vif_chanctx(struct ieee80211_hw *hw,
2078                                              struct ieee80211_vif *vif,
2079                                              struct ieee80211_chanctx_conf *ctx)
2080 {
2081         hwsim_check_magic(vif);
2082         hwsim_check_chanctx_magic(ctx);
2083
2084         return 0;
2085 }
2086
2087 static void mac80211_hwsim_unassign_vif_chanctx(struct ieee80211_hw *hw,
2088                                                 struct ieee80211_vif *vif,
2089                                                 struct ieee80211_chanctx_conf *ctx)
2090 {
2091         hwsim_check_magic(vif);
2092         hwsim_check_chanctx_magic(ctx);
2093 }
2094
2095 static const char mac80211_hwsim_gstrings_stats[][ETH_GSTRING_LEN] = {
2096         "tx_pkts_nic",
2097         "tx_bytes_nic",
2098         "rx_pkts_nic",
2099         "rx_bytes_nic",
2100         "d_tx_dropped",
2101         "d_tx_failed",
2102         "d_ps_mode",
2103         "d_group",
2104         "d_tx_power",
2105 };
2106
2107 #define MAC80211_HWSIM_SSTATS_LEN ARRAY_SIZE(mac80211_hwsim_gstrings_stats)
2108
2109 static void mac80211_hwsim_get_et_strings(struct ieee80211_hw *hw,
2110                                           struct ieee80211_vif *vif,
2111                                           u32 sset, u8 *data)
2112 {
2113         if (sset == ETH_SS_STATS)
2114                 memcpy(data, *mac80211_hwsim_gstrings_stats,
2115                        sizeof(mac80211_hwsim_gstrings_stats));
2116 }
2117
2118 static int mac80211_hwsim_get_et_sset_count(struct ieee80211_hw *hw,
2119                                             struct ieee80211_vif *vif, int sset)
2120 {
2121         if (sset == ETH_SS_STATS)
2122                 return MAC80211_HWSIM_SSTATS_LEN;
2123         return 0;
2124 }
2125
2126 static void mac80211_hwsim_get_et_stats(struct ieee80211_hw *hw,
2127                                         struct ieee80211_vif *vif,
2128                                         struct ethtool_stats *stats, u64 *data)
2129 {
2130         struct mac80211_hwsim_data *ar = hw->priv;
2131         int i = 0;
2132
2133         data[i++] = ar->tx_pkts;
2134         data[i++] = ar->tx_bytes;
2135         data[i++] = ar->rx_pkts;
2136         data[i++] = ar->rx_bytes;
2137         data[i++] = ar->tx_dropped;
2138         data[i++] = ar->tx_failed;
2139         data[i++] = ar->ps;
2140         data[i++] = ar->group;
2141         data[i++] = ar->power_level;
2142
2143         WARN_ON(i != MAC80211_HWSIM_SSTATS_LEN);
2144 }
2145
2146 static const struct ieee80211_ops mac80211_hwsim_ops = {
2147         .tx = mac80211_hwsim_tx,
2148         .start = mac80211_hwsim_start,
2149         .stop = mac80211_hwsim_stop,
2150         .add_interface = mac80211_hwsim_add_interface,
2151         .change_interface = mac80211_hwsim_change_interface,
2152         .remove_interface = mac80211_hwsim_remove_interface,
2153         .config = mac80211_hwsim_config,
2154         .configure_filter = mac80211_hwsim_configure_filter,
2155         .bss_info_changed = mac80211_hwsim_bss_info_changed,
2156         .sta_add = mac80211_hwsim_sta_add,
2157         .sta_remove = mac80211_hwsim_sta_remove,
2158         .sta_notify = mac80211_hwsim_sta_notify,
2159         .set_tim = mac80211_hwsim_set_tim,
2160         .conf_tx = mac80211_hwsim_conf_tx,
2161         .get_survey = mac80211_hwsim_get_survey,
2162         CFG80211_TESTMODE_CMD(mac80211_hwsim_testmode_cmd)
2163         .ampdu_action = mac80211_hwsim_ampdu_action,
2164         .sw_scan_start = mac80211_hwsim_sw_scan,
2165         .sw_scan_complete = mac80211_hwsim_sw_scan_complete,
2166         .flush = mac80211_hwsim_flush,
2167         .get_tsf = mac80211_hwsim_get_tsf,
2168         .set_tsf = mac80211_hwsim_set_tsf,
2169         .get_et_sset_count = mac80211_hwsim_get_et_sset_count,
2170         .get_et_stats = mac80211_hwsim_get_et_stats,
2171         .get_et_strings = mac80211_hwsim_get_et_strings,
2172 };
2173
2174 static struct ieee80211_ops mac80211_hwsim_mchan_ops;
2175
2176 struct hwsim_new_radio_params {
2177         unsigned int channels;
2178         const char *reg_alpha2;
2179         const struct ieee80211_regdomain *regd;
2180         bool reg_strict;
2181         bool p2p_device;
2182         bool use_chanctx;
2183         bool destroy_on_close;
2184         const char *hwname;
2185         bool no_vif;
2186 };
2187
2188 static void hwsim_mcast_config_msg(struct sk_buff *mcast_skb,
2189                                    struct genl_info *info)
2190 {
2191         if (info)
2192                 genl_notify(&hwsim_genl_family, mcast_skb,
2193                             genl_info_net(info), info->snd_portid,
2194                             HWSIM_MCGRP_CONFIG, info->nlhdr, GFP_KERNEL);
2195         else
2196                 genlmsg_multicast(&hwsim_genl_family, mcast_skb, 0,
2197                                   HWSIM_MCGRP_CONFIG, GFP_KERNEL);
2198 }
2199
2200 static int append_radio_msg(struct sk_buff *skb, int id,
2201                             struct hwsim_new_radio_params *param)
2202 {
2203         int ret;
2204
2205         ret = nla_put_u32(skb, HWSIM_ATTR_RADIO_ID, id);
2206         if (ret < 0)
2207                 return ret;
2208
2209         if (param->channels) {
2210                 ret = nla_put_u32(skb, HWSIM_ATTR_CHANNELS, param->channels);
2211                 if (ret < 0)
2212                         return ret;
2213         }
2214
2215         if (param->reg_alpha2) {
2216                 ret = nla_put(skb, HWSIM_ATTR_REG_HINT_ALPHA2, 2,
2217                               param->reg_alpha2);
2218                 if (ret < 0)
2219                         return ret;
2220         }
2221
2222         if (param->regd) {
2223                 int i;
2224
2225                 for (i = 0; i < ARRAY_SIZE(hwsim_world_regdom_custom); i++) {
2226                         if (hwsim_world_regdom_custom[i] != param->regd)
2227                                 continue;
2228
2229                         ret = nla_put_u32(skb, HWSIM_ATTR_REG_CUSTOM_REG, i);
2230                         if (ret < 0)
2231                                 return ret;
2232                         break;
2233                 }
2234         }
2235
2236         if (param->reg_strict) {
2237                 ret = nla_put_flag(skb, HWSIM_ATTR_REG_STRICT_REG);
2238                 if (ret < 0)
2239                         return ret;
2240         }
2241
2242         if (param->p2p_device) {
2243                 ret = nla_put_flag(skb, HWSIM_ATTR_SUPPORT_P2P_DEVICE);
2244                 if (ret < 0)
2245                         return ret;
2246         }
2247
2248         if (param->use_chanctx) {
2249                 ret = nla_put_flag(skb, HWSIM_ATTR_USE_CHANCTX);
2250                 if (ret < 0)
2251                         return ret;
2252         }
2253
2254         if (param->hwname) {
2255                 ret = nla_put(skb, HWSIM_ATTR_RADIO_NAME,
2256                               strlen(param->hwname), param->hwname);
2257                 if (ret < 0)
2258                         return ret;
2259         }
2260
2261         return 0;
2262 }
2263
2264 static void hwsim_mcast_new_radio(int id, struct genl_info *info,
2265                                   struct hwsim_new_radio_params *param)
2266 {
2267         struct sk_buff *mcast_skb;
2268         void *data;
2269
2270         mcast_skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2271         if (!mcast_skb)
2272                 return;
2273
2274         data = genlmsg_put(mcast_skb, 0, 0, &hwsim_genl_family, 0,
2275                            HWSIM_CMD_NEW_RADIO);
2276         if (!data)
2277                 goto out_err;
2278
2279         if (append_radio_msg(mcast_skb, id, param) < 0)
2280                 goto out_err;
2281
2282         genlmsg_end(mcast_skb, data);
2283
2284         hwsim_mcast_config_msg(mcast_skb, info);
2285         return;
2286
2287 out_err:
2288         genlmsg_cancel(mcast_skb, data);
2289         nlmsg_free(mcast_skb);
2290 }
2291
2292 static int mac80211_hwsim_new_radio(struct genl_info *info,
2293                                     struct hwsim_new_radio_params *param)
2294 {
2295         int err;
2296         u8 addr[ETH_ALEN];
2297         struct mac80211_hwsim_data *data;
2298         struct ieee80211_hw *hw;
2299         enum ieee80211_band band;
2300         const struct ieee80211_ops *ops = &mac80211_hwsim_ops;
2301         int idx;
2302
2303         if (WARN_ON(param->channels > 1 && !param->use_chanctx))
2304                 return -EINVAL;
2305
2306         spin_lock_bh(&hwsim_radio_lock);
2307         idx = hwsim_radio_idx++;
2308         spin_unlock_bh(&hwsim_radio_lock);
2309
2310         if (param->use_chanctx)
2311                 ops = &mac80211_hwsim_mchan_ops;
2312         hw = ieee80211_alloc_hw_nm(sizeof(*data), ops, param->hwname);
2313         if (!hw) {
2314                 printk(KERN_DEBUG "mac80211_hwsim: ieee80211_alloc_hw failed\n");
2315                 err = -ENOMEM;
2316                 goto failed;
2317         }
2318         data = hw->priv;
2319         data->hw = hw;
2320
2321         data->dev = device_create(hwsim_class, NULL, 0, hw, "hwsim%d", idx);
2322         if (IS_ERR(data->dev)) {
2323                 printk(KERN_DEBUG
2324                        "mac80211_hwsim: device_create failed (%ld)\n",
2325                        PTR_ERR(data->dev));
2326                 err = -ENOMEM;
2327                 goto failed_drvdata;
2328         }
2329         data->dev->driver = &mac80211_hwsim_driver.driver;
2330         err = device_bind_driver(data->dev);
2331         if (err != 0) {
2332                 printk(KERN_DEBUG "mac80211_hwsim: device_bind_driver failed (%d)\n",
2333                        err);
2334                 goto failed_bind;
2335         }
2336
2337         skb_queue_head_init(&data->pending);
2338
2339         SET_IEEE80211_DEV(hw, data->dev);
2340         memset(addr, 0, ETH_ALEN);
2341         addr[0] = 0x02;
2342         addr[3] = idx >> 8;
2343         addr[4] = idx;
2344         memcpy(data->addresses[0].addr, addr, ETH_ALEN);
2345         memcpy(data->addresses[1].addr, addr, ETH_ALEN);
2346         data->addresses[1].addr[0] |= 0x40;
2347         hw->wiphy->n_addresses = 2;
2348         hw->wiphy->addresses = data->addresses;
2349
2350         data->channels = param->channels;
2351         data->use_chanctx = param->use_chanctx;
2352         data->idx = idx;
2353         data->destroy_on_close = param->destroy_on_close;
2354         if (info)
2355                 data->portid = info->snd_portid;
2356
2357         if (data->use_chanctx) {
2358                 hw->wiphy->max_scan_ssids = 255;
2359                 hw->wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
2360                 hw->wiphy->max_remain_on_channel_duration = 1000;
2361                 /* For channels > 1 DFS is not allowed */
2362                 hw->wiphy->n_iface_combinations = 1;
2363                 hw->wiphy->iface_combinations = &data->if_combination;
2364                 if (param->p2p_device)
2365                         data->if_combination = hwsim_if_comb_p2p_dev[0];
2366                 else
2367                         data->if_combination = hwsim_if_comb[0];
2368                 data->if_combination.num_different_channels = data->channels;
2369         } else if (param->p2p_device) {
2370                 hw->wiphy->iface_combinations = hwsim_if_comb_p2p_dev;
2371                 hw->wiphy->n_iface_combinations =
2372                         ARRAY_SIZE(hwsim_if_comb_p2p_dev);
2373         } else {
2374                 hw->wiphy->iface_combinations = hwsim_if_comb;
2375                 hw->wiphy->n_iface_combinations = ARRAY_SIZE(hwsim_if_comb);
2376         }
2377
2378         INIT_DELAYED_WORK(&data->roc_done, hw_roc_done);
2379         INIT_DELAYED_WORK(&data->hw_scan, hw_scan_work);
2380
2381         hw->queues = 5;
2382         hw->offchannel_tx_hw_queue = 4;
2383         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
2384                                      BIT(NL80211_IFTYPE_AP) |
2385                                      BIT(NL80211_IFTYPE_P2P_CLIENT) |
2386                                      BIT(NL80211_IFTYPE_P2P_GO) |
2387                                      BIT(NL80211_IFTYPE_ADHOC) |
2388                                      BIT(NL80211_IFTYPE_MESH_POINT);
2389
2390         if (param->p2p_device)
2391                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_P2P_DEVICE);
2392
2393         hw->flags = IEEE80211_HW_MFP_CAPABLE |
2394                     IEEE80211_HW_SIGNAL_DBM |
2395                     IEEE80211_HW_AMPDU_AGGREGATION |
2396                     IEEE80211_HW_WANT_MONITOR_VIF |
2397                     IEEE80211_HW_QUEUE_CONTROL |
2398                     IEEE80211_HW_SUPPORTS_HT_CCK_RATES |
2399                     IEEE80211_HW_CHANCTX_STA_CSA;
2400         if (rctbl)
2401                 hw->flags |= IEEE80211_HW_SUPPORTS_RC_TABLE;
2402
2403         hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS |
2404                             WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL |
2405                             WIPHY_FLAG_AP_UAPSD |
2406                             WIPHY_FLAG_HAS_CHANNEL_SWITCH;
2407         hw->wiphy->features |= NL80211_FEATURE_ACTIVE_MONITOR |
2408                                NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE |
2409                                NL80211_FEATURE_STATIC_SMPS |
2410                                NL80211_FEATURE_DYNAMIC_SMPS |
2411                                NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR;
2412
2413         /* ask mac80211 to reserve space for magic */
2414         hw->vif_data_size = sizeof(struct hwsim_vif_priv);
2415         hw->sta_data_size = sizeof(struct hwsim_sta_priv);
2416         hw->chanctx_data_size = sizeof(struct hwsim_chanctx_priv);
2417
2418         memcpy(data->channels_2ghz, hwsim_channels_2ghz,
2419                 sizeof(hwsim_channels_2ghz));
2420         memcpy(data->channels_5ghz, hwsim_channels_5ghz,
2421                 sizeof(hwsim_channels_5ghz));
2422         memcpy(data->rates, hwsim_rates, sizeof(hwsim_rates));
2423
2424         for (band = IEEE80211_BAND_2GHZ; band < IEEE80211_NUM_BANDS; band++) {
2425                 struct ieee80211_supported_band *sband = &data->bands[band];
2426                 switch (band) {
2427                 case IEEE80211_BAND_2GHZ:
2428                         sband->channels = data->channels_2ghz;
2429                         sband->n_channels = ARRAY_SIZE(hwsim_channels_2ghz);
2430                         sband->bitrates = data->rates;
2431                         sband->n_bitrates = ARRAY_SIZE(hwsim_rates);
2432                         break;
2433                 case IEEE80211_BAND_5GHZ:
2434                         sband->channels = data->channels_5ghz;
2435                         sband->n_channels = ARRAY_SIZE(hwsim_channels_5ghz);
2436                         sband->bitrates = data->rates + 4;
2437                         sband->n_bitrates = ARRAY_SIZE(hwsim_rates) - 4;
2438                         break;
2439                 default:
2440                         continue;
2441                 }
2442
2443                 sband->ht_cap.ht_supported = true;
2444                 sband->ht_cap.cap = IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
2445                                     IEEE80211_HT_CAP_GRN_FLD |
2446                                     IEEE80211_HT_CAP_SGI_20 |
2447                                     IEEE80211_HT_CAP_SGI_40 |
2448                                     IEEE80211_HT_CAP_DSSSCCK40;
2449                 sband->ht_cap.ampdu_factor = 0x3;
2450                 sband->ht_cap.ampdu_density = 0x6;
2451                 memset(&sband->ht_cap.mcs, 0,
2452                        sizeof(sband->ht_cap.mcs));
2453                 sband->ht_cap.mcs.rx_mask[0] = 0xff;
2454                 sband->ht_cap.mcs.rx_mask[1] = 0xff;
2455                 sband->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
2456
2457                 hw->wiphy->bands[band] = sband;
2458
2459                 sband->vht_cap.vht_supported = true;
2460                 sband->vht_cap.cap =
2461                         IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454 |
2462                         IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ |
2463                         IEEE80211_VHT_CAP_RXLDPC |
2464                         IEEE80211_VHT_CAP_SHORT_GI_80 |
2465                         IEEE80211_VHT_CAP_SHORT_GI_160 |
2466                         IEEE80211_VHT_CAP_TXSTBC |
2467                         IEEE80211_VHT_CAP_RXSTBC_1 |
2468                         IEEE80211_VHT_CAP_RXSTBC_2 |
2469                         IEEE80211_VHT_CAP_RXSTBC_3 |
2470                         IEEE80211_VHT_CAP_RXSTBC_4 |
2471                         IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
2472                 sband->vht_cap.vht_mcs.rx_mcs_map =
2473                         cpu_to_le16(IEEE80211_VHT_MCS_SUPPORT_0_8 << 0 |
2474                                     IEEE80211_VHT_MCS_SUPPORT_0_8 << 2 |
2475                                     IEEE80211_VHT_MCS_SUPPORT_0_9 << 4 |
2476                                     IEEE80211_VHT_MCS_SUPPORT_0_8 << 6 |
2477                                     IEEE80211_VHT_MCS_SUPPORT_0_8 << 8 |
2478                                     IEEE80211_VHT_MCS_SUPPORT_0_9 << 10 |
2479                                     IEEE80211_VHT_MCS_SUPPORT_0_9 << 12 |
2480                                     IEEE80211_VHT_MCS_SUPPORT_0_8 << 14);
2481                 sband->vht_cap.vht_mcs.tx_mcs_map =
2482                         sband->vht_cap.vht_mcs.rx_mcs_map;
2483         }
2484
2485         /* By default all radios belong to the first group */
2486         data->group = 1;
2487         mutex_init(&data->mutex);
2488
2489         /* Enable frame retransmissions for lossy channels */
2490         hw->max_rates = 4;
2491         hw->max_rate_tries = 11;
2492
2493         hw->wiphy->vendor_commands = mac80211_hwsim_vendor_commands;
2494         hw->wiphy->n_vendor_commands =
2495                 ARRAY_SIZE(mac80211_hwsim_vendor_commands);
2496         hw->wiphy->vendor_events = mac80211_hwsim_vendor_events;
2497         hw->wiphy->n_vendor_events = ARRAY_SIZE(mac80211_hwsim_vendor_events);
2498
2499         if (param->reg_strict)
2500                 hw->wiphy->regulatory_flags |= REGULATORY_STRICT_REG;
2501         if (param->regd) {
2502                 data->regd = param->regd;
2503                 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG;
2504                 wiphy_apply_custom_regulatory(hw->wiphy, param->regd);
2505                 /* give the regulatory workqueue a chance to run */
2506                 schedule_timeout_interruptible(1);
2507         }
2508
2509         if (param->no_vif)
2510                 hw->flags |= IEEE80211_HW_NO_AUTO_VIF;
2511
2512         err = ieee80211_register_hw(hw);
2513         if (err < 0) {
2514                 printk(KERN_DEBUG "mac80211_hwsim: ieee80211_register_hw failed (%d)\n",
2515                        err);
2516                 goto failed_hw;
2517         }
2518
2519         wiphy_debug(hw->wiphy, "hwaddr %pM registered\n", hw->wiphy->perm_addr);
2520
2521         if (param->reg_alpha2) {
2522                 data->alpha2[0] = param->reg_alpha2[0];
2523                 data->alpha2[1] = param->reg_alpha2[1];
2524                 regulatory_hint(hw->wiphy, param->reg_alpha2);
2525         }
2526
2527         data->debugfs = debugfs_create_dir("hwsim", hw->wiphy->debugfsdir);
2528         debugfs_create_file("ps", 0666, data->debugfs, data, &hwsim_fops_ps);
2529         debugfs_create_file("group", 0666, data->debugfs, data,
2530                             &hwsim_fops_group);
2531         if (!data->use_chanctx)
2532                 debugfs_create_file("dfs_simulate_radar", 0222,
2533                                     data->debugfs,
2534                                     data, &hwsim_simulate_radar);
2535
2536         tasklet_hrtimer_init(&data->beacon_timer,
2537                              mac80211_hwsim_beacon,
2538                              CLOCK_MONOTONIC_RAW, HRTIMER_MODE_ABS);
2539
2540         spin_lock_bh(&hwsim_radio_lock);
2541         list_add_tail(&data->list, &hwsim_radios);
2542         spin_unlock_bh(&hwsim_radio_lock);
2543
2544         if (idx > 0)
2545                 hwsim_mcast_new_radio(idx, info, param);
2546
2547         return idx;
2548
2549 failed_hw:
2550         device_release_driver(data->dev);
2551 failed_bind:
2552         device_unregister(data->dev);
2553 failed_drvdata:
2554         ieee80211_free_hw(hw);
2555 failed:
2556         return err;
2557 }
2558
2559 static void hwsim_mcast_del_radio(int id, const char *hwname,
2560                                   struct genl_info *info)
2561 {
2562         struct sk_buff *skb;
2563         void *data;
2564         int ret;
2565
2566         skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2567         if (!skb)
2568                 return;
2569
2570         data = genlmsg_put(skb, 0, 0, &hwsim_genl_family, 0,
2571                            HWSIM_CMD_DEL_RADIO);
2572         if (!data)
2573                 goto error;
2574
2575         ret = nla_put_u32(skb, HWSIM_ATTR_RADIO_ID, id);
2576         if (ret < 0)
2577                 goto error;
2578
2579         ret = nla_put(skb, HWSIM_ATTR_RADIO_NAME, strlen(hwname),
2580                       hwname);
2581         if (ret < 0)
2582                 goto error;
2583
2584         genlmsg_end(skb, data);
2585
2586         hwsim_mcast_config_msg(skb, info);
2587
2588         return;
2589
2590 error:
2591         nlmsg_free(skb);
2592 }
2593
2594 static void mac80211_hwsim_del_radio(struct mac80211_hwsim_data *data,
2595                                      const char *hwname,
2596                                      struct genl_info *info)
2597 {
2598         hwsim_mcast_del_radio(data->idx, hwname, info);
2599         debugfs_remove_recursive(data->debugfs);
2600         ieee80211_unregister_hw(data->hw);
2601         device_release_driver(data->dev);
2602         device_unregister(data->dev);
2603         ieee80211_free_hw(data->hw);
2604 }
2605
2606 static int mac80211_hwsim_get_radio(struct sk_buff *skb,
2607                                     struct mac80211_hwsim_data *data,
2608                                     u32 portid, u32 seq,
2609                                     struct netlink_callback *cb, int flags)
2610 {
2611         void *hdr;
2612         struct hwsim_new_radio_params param = { };
2613         int res = -EMSGSIZE;
2614
2615         hdr = genlmsg_put(skb, portid, seq, &hwsim_genl_family, flags,
2616                           HWSIM_CMD_GET_RADIO);
2617         if (!hdr)
2618                 return -EMSGSIZE;
2619
2620         if (cb)
2621                 genl_dump_check_consistent(cb, hdr, &hwsim_genl_family);
2622
2623         if (data->alpha2[0] && data->alpha2[1])
2624                 param.reg_alpha2 = data->alpha2;
2625
2626         param.reg_strict = !!(data->hw->wiphy->regulatory_flags &
2627                                         REGULATORY_STRICT_REG);
2628         param.p2p_device = !!(data->hw->wiphy->interface_modes &
2629                                         BIT(NL80211_IFTYPE_P2P_DEVICE));
2630         param.use_chanctx = data->use_chanctx;
2631         param.regd = data->regd;
2632         param.channels = data->channels;
2633         param.hwname = wiphy_name(data->hw->wiphy);
2634
2635         res = append_radio_msg(skb, data->idx, &param);
2636         if (res < 0)
2637                 goto out_err;
2638
2639         genlmsg_end(skb, hdr);
2640         return 0;
2641
2642 out_err:
2643         genlmsg_cancel(skb, hdr);
2644         return res;
2645 }
2646
2647 static void mac80211_hwsim_free(void)
2648 {
2649         struct mac80211_hwsim_data *data;
2650
2651         spin_lock_bh(&hwsim_radio_lock);
2652         while ((data = list_first_entry_or_null(&hwsim_radios,
2653                                                 struct mac80211_hwsim_data,
2654                                                 list))) {
2655                 list_del(&data->list);
2656                 spin_unlock_bh(&hwsim_radio_lock);
2657                 mac80211_hwsim_del_radio(data, wiphy_name(data->hw->wiphy),
2658                                          NULL);
2659                 spin_lock_bh(&hwsim_radio_lock);
2660         }
2661         spin_unlock_bh(&hwsim_radio_lock);
2662         class_destroy(hwsim_class);
2663 }
2664
2665 static const struct net_device_ops hwsim_netdev_ops = {
2666         .ndo_start_xmit         = hwsim_mon_xmit,
2667         .ndo_change_mtu         = eth_change_mtu,
2668         .ndo_set_mac_address    = eth_mac_addr,
2669         .ndo_validate_addr      = eth_validate_addr,
2670 };
2671
2672 static void hwsim_mon_setup(struct net_device *dev)
2673 {
2674         dev->netdev_ops = &hwsim_netdev_ops;
2675         dev->destructor = free_netdev;
2676         ether_setup(dev);
2677         dev->tx_queue_len = 0;
2678         dev->type = ARPHRD_IEEE80211_RADIOTAP;
2679         memset(dev->dev_addr, 0, ETH_ALEN);
2680         dev->dev_addr[0] = 0x12;
2681 }
2682
2683 static struct mac80211_hwsim_data *get_hwsim_data_ref_from_addr(const u8 *addr)
2684 {
2685         struct mac80211_hwsim_data *data;
2686         bool _found = false;
2687
2688         spin_lock_bh(&hwsim_radio_lock);
2689         list_for_each_entry(data, &hwsim_radios, list) {
2690                 if (mac80211_hwsim_addr_match(data, addr)) {
2691                         _found = true;
2692                         break;
2693                 }
2694         }
2695         spin_unlock_bh(&hwsim_radio_lock);
2696
2697         if (!_found)
2698                 return NULL;
2699
2700         return data;
2701 }
2702
2703 static int hwsim_tx_info_frame_received_nl(struct sk_buff *skb_2,
2704                                            struct genl_info *info)
2705 {
2706
2707         struct ieee80211_hdr *hdr;
2708         struct mac80211_hwsim_data *data2;
2709         struct ieee80211_tx_info *txi;
2710         struct hwsim_tx_rate *tx_attempts;
2711         unsigned long ret_skb_ptr;
2712         struct sk_buff *skb, *tmp;
2713         const u8 *src;
2714         unsigned int hwsim_flags;
2715         int i;
2716         bool found = false;
2717
2718         if (info->snd_portid != wmediumd_portid)
2719                 return -EINVAL;
2720
2721         if (!info->attrs[HWSIM_ATTR_ADDR_TRANSMITTER] ||
2722             !info->attrs[HWSIM_ATTR_FLAGS] ||
2723             !info->attrs[HWSIM_ATTR_COOKIE] ||
2724             !info->attrs[HWSIM_ATTR_TX_INFO])
2725                 goto out;
2726
2727         src = (void *)nla_data(info->attrs[HWSIM_ATTR_ADDR_TRANSMITTER]);
2728         hwsim_flags = nla_get_u32(info->attrs[HWSIM_ATTR_FLAGS]);
2729         ret_skb_ptr = nla_get_u64(info->attrs[HWSIM_ATTR_COOKIE]);
2730
2731         data2 = get_hwsim_data_ref_from_addr(src);
2732         if (!data2)
2733                 goto out;
2734
2735         /* look for the skb matching the cookie passed back from user */
2736         skb_queue_walk_safe(&data2->pending, skb, tmp) {
2737                 if ((unsigned long)skb == ret_skb_ptr) {
2738                         skb_unlink(skb, &data2->pending);
2739                         found = true;
2740                         break;
2741                 }
2742         }
2743
2744         /* not found */
2745         if (!found)
2746                 goto out;
2747
2748         /* Tx info received because the frame was broadcasted on user space,
2749          so we get all the necessary info: tx attempts and skb control buff */
2750
2751         tx_attempts = (struct hwsim_tx_rate *)nla_data(
2752                        info->attrs[HWSIM_ATTR_TX_INFO]);
2753
2754         /* now send back TX status */
2755         txi = IEEE80211_SKB_CB(skb);
2756
2757         ieee80211_tx_info_clear_status(txi);
2758
2759         for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
2760                 txi->status.rates[i].idx = tx_attempts[i].idx;
2761                 txi->status.rates[i].count = tx_attempts[i].count;
2762                 /*txi->status.rates[i].flags = 0;*/
2763         }
2764
2765         txi->status.ack_signal = nla_get_u32(info->attrs[HWSIM_ATTR_SIGNAL]);
2766
2767         if (!(hwsim_flags & HWSIM_TX_CTL_NO_ACK) &&
2768            (hwsim_flags & HWSIM_TX_STAT_ACK)) {
2769                 if (skb->len >= 16) {
2770                         hdr = (struct ieee80211_hdr *) skb->data;
2771                         mac80211_hwsim_monitor_ack(data2->channel,
2772                                                    hdr->addr2);
2773                 }
2774                 txi->flags |= IEEE80211_TX_STAT_ACK;
2775         }
2776         ieee80211_tx_status_irqsafe(data2->hw, skb);
2777         return 0;
2778 out:
2779         return -EINVAL;
2780
2781 }
2782
2783 static int hwsim_cloned_frame_received_nl(struct sk_buff *skb_2,
2784                                           struct genl_info *info)
2785 {
2786         struct mac80211_hwsim_data *data2;
2787         struct ieee80211_rx_status rx_status;
2788         const u8 *dst;
2789         int frame_data_len;
2790         void *frame_data;
2791         struct sk_buff *skb = NULL;
2792
2793         if (info->snd_portid != wmediumd_portid)
2794                 return -EINVAL;
2795
2796         if (!info->attrs[HWSIM_ATTR_ADDR_RECEIVER] ||
2797             !info->attrs[HWSIM_ATTR_FRAME] ||
2798             !info->attrs[HWSIM_ATTR_RX_RATE] ||
2799             !info->attrs[HWSIM_ATTR_SIGNAL])
2800                 goto out;
2801
2802         dst = (void *)nla_data(info->attrs[HWSIM_ATTR_ADDR_RECEIVER]);
2803         frame_data_len = nla_len(info->attrs[HWSIM_ATTR_FRAME]);
2804         frame_data = (void *)nla_data(info->attrs[HWSIM_ATTR_FRAME]);
2805
2806         /* Allocate new skb here */
2807         skb = alloc_skb(frame_data_len, GFP_KERNEL);
2808         if (skb == NULL)
2809                 goto err;
2810
2811         if (frame_data_len > IEEE80211_MAX_DATA_LEN)
2812                 goto err;
2813
2814         /* Copy the data */
2815         memcpy(skb_put(skb, frame_data_len), frame_data, frame_data_len);
2816
2817         data2 = get_hwsim_data_ref_from_addr(dst);
2818         if (!data2)
2819                 goto out;
2820
2821         /* check if radio is configured properly */
2822
2823         if (data2->idle || !data2->started)
2824                 goto out;
2825
2826         /* A frame is received from user space */
2827         memset(&rx_status, 0, sizeof(rx_status));
2828         /* TODO: Check ATTR_FREQ if it exists, and maybe throw away off-channel
2829          * packets?
2830          */
2831         rx_status.freq = data2->channel->center_freq;
2832         rx_status.band = data2->channel->band;
2833         rx_status.rate_idx = nla_get_u32(info->attrs[HWSIM_ATTR_RX_RATE]);
2834         rx_status.signal = nla_get_u32(info->attrs[HWSIM_ATTR_SIGNAL]);
2835
2836         memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
2837         data2->rx_pkts++;
2838         data2->rx_bytes += skb->len;
2839         ieee80211_rx_irqsafe(data2->hw, skb);
2840
2841         return 0;
2842 err:
2843         printk(KERN_DEBUG "mac80211_hwsim: error occurred in %s\n", __func__);
2844 out:
2845         dev_kfree_skb(skb);
2846         return -EINVAL;
2847 }
2848
2849 static int hwsim_register_received_nl(struct sk_buff *skb_2,
2850                                       struct genl_info *info)
2851 {
2852         struct mac80211_hwsim_data *data;
2853         int chans = 1;
2854
2855         spin_lock_bh(&hwsim_radio_lock);
2856         list_for_each_entry(data, &hwsim_radios, list)
2857                 chans = max(chans, data->channels);
2858         spin_unlock_bh(&hwsim_radio_lock);
2859
2860         /* In the future we should revise the userspace API and allow it
2861          * to set a flag that it does support multi-channel, then we can
2862          * let this pass conditionally on the flag.
2863          * For current userspace, prohibit it since it won't work right.
2864          */
2865         if (chans > 1)
2866                 return -EOPNOTSUPP;
2867
2868         if (wmediumd_portid)
2869                 return -EBUSY;
2870
2871         wmediumd_portid = info->snd_portid;
2872
2873         printk(KERN_DEBUG "mac80211_hwsim: received a REGISTER, "
2874                "switching to wmediumd mode with pid %d\n", info->snd_portid);
2875
2876         return 0;
2877 }
2878
2879 static int hwsim_new_radio_nl(struct sk_buff *msg, struct genl_info *info)
2880 {
2881         struct hwsim_new_radio_params param = { 0 };
2882
2883         param.reg_strict = info->attrs[HWSIM_ATTR_REG_STRICT_REG];
2884         param.p2p_device = info->attrs[HWSIM_ATTR_SUPPORT_P2P_DEVICE];
2885         param.channels = channels;
2886         param.destroy_on_close =
2887                 info->attrs[HWSIM_ATTR_DESTROY_RADIO_ON_CLOSE];
2888
2889         if (info->attrs[HWSIM_ATTR_CHANNELS])
2890                 param.channels = nla_get_u32(info->attrs[HWSIM_ATTR_CHANNELS]);
2891
2892         if (info->attrs[HWSIM_ATTR_NO_VIF])
2893                 param.no_vif = true;
2894
2895         if (info->attrs[HWSIM_ATTR_RADIO_NAME])
2896                 param.hwname = nla_data(info->attrs[HWSIM_ATTR_RADIO_NAME]);
2897
2898         if (info->attrs[HWSIM_ATTR_USE_CHANCTX])
2899                 param.use_chanctx = true;
2900         else
2901                 param.use_chanctx = (param.channels > 1);
2902
2903         if (info->attrs[HWSIM_ATTR_REG_HINT_ALPHA2])
2904                 param.reg_alpha2 =
2905                         nla_data(info->attrs[HWSIM_ATTR_REG_HINT_ALPHA2]);
2906
2907         if (info->attrs[HWSIM_ATTR_REG_CUSTOM_REG]) {
2908                 u32 idx = nla_get_u32(info->attrs[HWSIM_ATTR_REG_CUSTOM_REG]);
2909
2910                 if (idx >= ARRAY_SIZE(hwsim_world_regdom_custom))
2911                         return -EINVAL;
2912                 param.regd = hwsim_world_regdom_custom[idx];
2913         }
2914
2915         return mac80211_hwsim_new_radio(info, &param);
2916 }
2917
2918 static int hwsim_del_radio_nl(struct sk_buff *msg, struct genl_info *info)
2919 {
2920         struct mac80211_hwsim_data *data;
2921         s64 idx = -1;
2922         const char *hwname = NULL;
2923
2924         if (info->attrs[HWSIM_ATTR_RADIO_ID])
2925                 idx = nla_get_u32(info->attrs[HWSIM_ATTR_RADIO_ID]);
2926         else if (info->attrs[HWSIM_ATTR_RADIO_NAME])
2927                 hwname = (void *)nla_data(info->attrs[HWSIM_ATTR_RADIO_NAME]);
2928         else
2929                 return -EINVAL;
2930
2931         spin_lock_bh(&hwsim_radio_lock);
2932         list_for_each_entry(data, &hwsim_radios, list) {
2933                 if (idx >= 0) {
2934                         if (data->idx != idx)
2935                                 continue;
2936                 } else {
2937                         if (strcmp(hwname, wiphy_name(data->hw->wiphy)))
2938                                 continue;
2939                 }
2940
2941                 list_del(&data->list);
2942                 spin_unlock_bh(&hwsim_radio_lock);
2943                 mac80211_hwsim_del_radio(data, wiphy_name(data->hw->wiphy),
2944                                          info);
2945                 return 0;
2946         }
2947         spin_unlock_bh(&hwsim_radio_lock);
2948
2949         return -ENODEV;
2950 }
2951
2952 static int hwsim_get_radio_nl(struct sk_buff *msg, struct genl_info *info)
2953 {
2954         struct mac80211_hwsim_data *data;
2955         struct sk_buff *skb;
2956         int idx, res = -ENODEV;
2957
2958         if (!info->attrs[HWSIM_ATTR_RADIO_ID])
2959                 return -EINVAL;
2960         idx = nla_get_u32(info->attrs[HWSIM_ATTR_RADIO_ID]);
2961
2962         spin_lock_bh(&hwsim_radio_lock);
2963         list_for_each_entry(data, &hwsim_radios, list) {
2964                 if (data->idx != idx)
2965                         continue;
2966
2967                 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2968                 if (!skb) {
2969                         res = -ENOMEM;
2970                         goto out_err;
2971                 }
2972
2973                 res = mac80211_hwsim_get_radio(skb, data, info->snd_portid,
2974                                                info->snd_seq, NULL, 0);
2975                 if (res < 0) {
2976                         nlmsg_free(skb);
2977                         goto out_err;
2978                 }
2979
2980                 genlmsg_reply(skb, info);
2981                 break;
2982         }
2983
2984 out_err:
2985         spin_unlock_bh(&hwsim_radio_lock);
2986
2987         return res;
2988 }
2989
2990 static int hwsim_dump_radio_nl(struct sk_buff *skb,
2991                                struct netlink_callback *cb)
2992 {
2993         int idx = cb->args[0];
2994         struct mac80211_hwsim_data *data = NULL;
2995         int res;
2996
2997         spin_lock_bh(&hwsim_radio_lock);
2998
2999         if (idx == hwsim_radio_idx)
3000                 goto done;
3001
3002         list_for_each_entry(data, &hwsim_radios, list) {
3003                 if (data->idx < idx)
3004                         continue;
3005
3006                 res = mac80211_hwsim_get_radio(skb, data,
3007                                                NETLINK_CB(cb->skb).portid,
3008                                                cb->nlh->nlmsg_seq, cb,
3009                                                NLM_F_MULTI);
3010                 if (res < 0)
3011                         break;
3012
3013                 idx = data->idx + 1;
3014         }
3015
3016         cb->args[0] = idx;
3017
3018 done:
3019         spin_unlock_bh(&hwsim_radio_lock);
3020         return skb->len;
3021 }
3022
3023 /* Generic Netlink operations array */
3024 static const struct genl_ops hwsim_ops[] = {
3025         {
3026                 .cmd = HWSIM_CMD_REGISTER,
3027                 .policy = hwsim_genl_policy,
3028                 .doit = hwsim_register_received_nl,
3029                 .flags = GENL_ADMIN_PERM,
3030         },
3031         {
3032                 .cmd = HWSIM_CMD_FRAME,
3033                 .policy = hwsim_genl_policy,
3034                 .doit = hwsim_cloned_frame_received_nl,
3035         },
3036         {
3037                 .cmd = HWSIM_CMD_TX_INFO_FRAME,
3038                 .policy = hwsim_genl_policy,
3039                 .doit = hwsim_tx_info_frame_received_nl,
3040         },
3041         {
3042                 .cmd = HWSIM_CMD_NEW_RADIO,
3043                 .policy = hwsim_genl_policy,
3044                 .doit = hwsim_new_radio_nl,
3045                 .flags = GENL_ADMIN_PERM,
3046         },
3047         {
3048                 .cmd = HWSIM_CMD_DEL_RADIO,
3049                 .policy = hwsim_genl_policy,
3050                 .doit = hwsim_del_radio_nl,
3051                 .flags = GENL_ADMIN_PERM,
3052         },
3053         {
3054                 .cmd = HWSIM_CMD_GET_RADIO,
3055                 .policy = hwsim_genl_policy,
3056                 .doit = hwsim_get_radio_nl,
3057                 .dumpit = hwsim_dump_radio_nl,
3058         },
3059 };
3060
3061 static void destroy_radio(struct work_struct *work)
3062 {
3063         struct mac80211_hwsim_data *data =
3064                 container_of(work, struct mac80211_hwsim_data, destroy_work);
3065
3066         mac80211_hwsim_del_radio(data, wiphy_name(data->hw->wiphy), NULL);
3067 }
3068
3069 static void remove_user_radios(u32 portid)
3070 {
3071         struct mac80211_hwsim_data *entry, *tmp;
3072
3073         spin_lock_bh(&hwsim_radio_lock);
3074         list_for_each_entry_safe(entry, tmp, &hwsim_radios, list) {
3075                 if (entry->destroy_on_close && entry->portid == portid) {
3076                         list_del(&entry->list);
3077                         INIT_WORK(&entry->destroy_work, destroy_radio);
3078                         schedule_work(&entry->destroy_work);
3079                 }
3080         }
3081         spin_unlock_bh(&hwsim_radio_lock);
3082 }
3083
3084 static int mac80211_hwsim_netlink_notify(struct notifier_block *nb,
3085                                          unsigned long state,
3086                                          void *_notify)
3087 {
3088         struct netlink_notify *notify = _notify;
3089
3090         if (state != NETLINK_URELEASE)
3091                 return NOTIFY_DONE;
3092
3093         remove_user_radios(notify->portid);
3094
3095         if (notify->portid == wmediumd_portid) {
3096                 printk(KERN_INFO "mac80211_hwsim: wmediumd released netlink"
3097                        " socket, switching to perfect channel medium\n");
3098                 wmediumd_portid = 0;
3099         }
3100         return NOTIFY_DONE;
3101
3102 }
3103
3104 static struct notifier_block hwsim_netlink_notifier = {
3105         .notifier_call = mac80211_hwsim_netlink_notify,
3106 };
3107
3108 static int hwsim_init_netlink(void)
3109 {
3110         int rc;
3111
3112         printk(KERN_INFO "mac80211_hwsim: initializing netlink\n");
3113
3114         rc = genl_register_family_with_ops_groups(&hwsim_genl_family,
3115                                                   hwsim_ops,
3116                                                   hwsim_mcgrps);
3117         if (rc)
3118                 goto failure;
3119
3120         rc = netlink_register_notifier(&hwsim_netlink_notifier);
3121         if (rc)
3122                 goto failure;
3123
3124         return 0;
3125
3126 failure:
3127         printk(KERN_DEBUG "mac80211_hwsim: error occurred in %s\n", __func__);
3128         return -EINVAL;
3129 }
3130
3131 static void hwsim_exit_netlink(void)
3132 {
3133         /* unregister the notifier */
3134         netlink_unregister_notifier(&hwsim_netlink_notifier);
3135         /* unregister the family */
3136         genl_unregister_family(&hwsim_genl_family);
3137 }
3138
3139 static int __init init_mac80211_hwsim(void)
3140 {
3141         int i, err;
3142
3143         if (radios < 0 || radios > 100)
3144                 return -EINVAL;
3145
3146         if (channels < 1)
3147                 return -EINVAL;
3148
3149         mac80211_hwsim_mchan_ops = mac80211_hwsim_ops;
3150         mac80211_hwsim_mchan_ops.hw_scan = mac80211_hwsim_hw_scan;
3151         mac80211_hwsim_mchan_ops.cancel_hw_scan = mac80211_hwsim_cancel_hw_scan;
3152         mac80211_hwsim_mchan_ops.sw_scan_start = NULL;
3153         mac80211_hwsim_mchan_ops.sw_scan_complete = NULL;
3154         mac80211_hwsim_mchan_ops.remain_on_channel = mac80211_hwsim_roc;
3155         mac80211_hwsim_mchan_ops.cancel_remain_on_channel = mac80211_hwsim_croc;
3156         mac80211_hwsim_mchan_ops.add_chanctx = mac80211_hwsim_add_chanctx;
3157         mac80211_hwsim_mchan_ops.remove_chanctx = mac80211_hwsim_remove_chanctx;
3158         mac80211_hwsim_mchan_ops.change_chanctx = mac80211_hwsim_change_chanctx;
3159         mac80211_hwsim_mchan_ops.assign_vif_chanctx =
3160                 mac80211_hwsim_assign_vif_chanctx;
3161         mac80211_hwsim_mchan_ops.unassign_vif_chanctx =
3162                 mac80211_hwsim_unassign_vif_chanctx;
3163
3164         spin_lock_init(&hwsim_radio_lock);
3165         INIT_LIST_HEAD(&hwsim_radios);
3166
3167         err = platform_driver_register(&mac80211_hwsim_driver);
3168         if (err)
3169                 return err;
3170
3171         hwsim_class = class_create(THIS_MODULE, "mac80211_hwsim");
3172         if (IS_ERR(hwsim_class)) {
3173                 err = PTR_ERR(hwsim_class);
3174                 goto out_unregister_driver;
3175         }
3176
3177         err = hwsim_init_netlink();
3178         if (err < 0)
3179                 goto out_unregister_driver;
3180
3181         for (i = 0; i < radios; i++) {
3182                 struct hwsim_new_radio_params param = { 0 };
3183
3184                 param.channels = channels;
3185
3186                 switch (regtest) {
3187                 case HWSIM_REGTEST_DIFF_COUNTRY:
3188                         if (i < ARRAY_SIZE(hwsim_alpha2s))
3189                                 param.reg_alpha2 = hwsim_alpha2s[i];
3190                         break;
3191                 case HWSIM_REGTEST_DRIVER_REG_FOLLOW:
3192                         if (!i)
3193                                 param.reg_alpha2 = hwsim_alpha2s[0];
3194                         break;
3195                 case HWSIM_REGTEST_STRICT_ALL:
3196                         param.reg_strict = true;
3197                 case HWSIM_REGTEST_DRIVER_REG_ALL:
3198                         param.reg_alpha2 = hwsim_alpha2s[0];
3199                         break;
3200                 case HWSIM_REGTEST_WORLD_ROAM:
3201                         if (i == 0)
3202                                 param.regd = &hwsim_world_regdom_custom_01;
3203                         break;
3204                 case HWSIM_REGTEST_CUSTOM_WORLD:
3205                         param.regd = &hwsim_world_regdom_custom_01;
3206                         break;
3207                 case HWSIM_REGTEST_CUSTOM_WORLD_2:
3208                         if (i == 0)
3209                                 param.regd = &hwsim_world_regdom_custom_01;
3210                         else if (i == 1)
3211                                 param.regd = &hwsim_world_regdom_custom_02;
3212                         break;
3213                 case HWSIM_REGTEST_STRICT_FOLLOW:
3214                         if (i == 0) {
3215                                 param.reg_strict = true;
3216                                 param.reg_alpha2 = hwsim_alpha2s[0];
3217                         }
3218                         break;
3219                 case HWSIM_REGTEST_STRICT_AND_DRIVER_REG:
3220                         if (i == 0) {
3221                                 param.reg_strict = true;
3222                                 param.reg_alpha2 = hwsim_alpha2s[0];
3223                         } else if (i == 1) {
3224                                 param.reg_alpha2 = hwsim_alpha2s[1];
3225                         }
3226                         break;
3227                 case HWSIM_REGTEST_ALL:
3228                         switch (i) {
3229                         case 0:
3230                                 param.regd = &hwsim_world_regdom_custom_01;
3231                                 break;
3232                         case 1:
3233                                 param.regd = &hwsim_world_regdom_custom_02;
3234                                 break;
3235                         case 2:
3236                                 param.reg_alpha2 = hwsim_alpha2s[0];
3237                                 break;
3238                         case 3:
3239                                 param.reg_alpha2 = hwsim_alpha2s[1];
3240                                 break;
3241                         case 4:
3242                                 param.reg_strict = true;
3243                                 param.reg_alpha2 = hwsim_alpha2s[2];
3244                                 break;
3245                         }
3246                         break;
3247                 default:
3248                         break;
3249                 }
3250
3251                 param.p2p_device = support_p2p_device;
3252                 param.use_chanctx = channels > 1;
3253
3254                 err = mac80211_hwsim_new_radio(NULL, &param);
3255                 if (err < 0)
3256                         goto out_free_radios;
3257         }
3258
3259         hwsim_mon = alloc_netdev(0, "hwsim%d", NET_NAME_UNKNOWN,
3260                                  hwsim_mon_setup);
3261         if (hwsim_mon == NULL) {
3262                 err = -ENOMEM;
3263                 goto out_free_radios;
3264         }
3265
3266         rtnl_lock();
3267         err = dev_alloc_name(hwsim_mon, hwsim_mon->name);
3268         if (err < 0) {
3269                 rtnl_unlock();
3270                 goto out_free_radios;
3271         }
3272
3273         err = register_netdevice(hwsim_mon);
3274         if (err < 0) {
3275                 rtnl_unlock();
3276                 goto out_free_mon;
3277         }
3278         rtnl_unlock();
3279
3280         return 0;
3281
3282 out_free_mon:
3283         free_netdev(hwsim_mon);
3284 out_free_radios:
3285         mac80211_hwsim_free();
3286 out_unregister_driver:
3287         platform_driver_unregister(&mac80211_hwsim_driver);
3288         return err;
3289 }
3290 module_init(init_mac80211_hwsim);
3291
3292 static void __exit exit_mac80211_hwsim(void)
3293 {
3294         printk(KERN_DEBUG "mac80211_hwsim: unregister radios\n");
3295
3296         hwsim_exit_netlink();
3297
3298         mac80211_hwsim_free();
3299         unregister_netdev(hwsim_mon);
3300         platform_driver_unregister(&mac80211_hwsim_driver);
3301 }
3302 module_exit(exit_mac80211_hwsim);