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 ieee80211_channel *roc_chan;
 499         u32 roc_duration;
 500         struct delayed_work roc_start;
 501         struct delayed_work roc_done;
 502         struct delayed_work hw_scan;
 503         struct cfg80211_scan_request *hw_scan_request;
 504         struct ieee80211_vif *hw_scan_vif;
 505         int scan_chan_idx;
 506         u8 scan_addr[ETH_ALEN];
 507
 508         struct ieee80211_channel *channel;
 509         u64 beacon_int  /* beacon interval in us */;
 510         unsigned int rx_filter;
 511         bool started, idle, scanning;
 512         struct mutex mutex;
 513         struct tasklet_hrtimer beacon_timer;
 514         enum ps_mode {
 515                 PS_DISABLED, PS_ENABLED, PS_AUTO_POLL, PS_MANUAL_POLL
 516         } ps;
 517         bool ps_poll_pending;
 518         struct dentry *debugfs;
 519
 520         struct sk_buff_head pending;    /* packets pending */
 521         /*
 522          * Only radios in the same group can communicate together (the
 523          * channel has to match too). Each bit represents a group. A
 524          * radio can be in more than one group.
 525          */
 526         u64 group;
 527
 528         int power_level;
 529
 530         /* difference between this hw's clock and the real clock, in usecs */
 531         s64 tsf_offset;
 532         s64 bcn_delta;
 533         /* absolute beacon transmission time. Used to cover up "tx" delay. */
 534         u64 abs_bcn_ts;
 535
 536         /* Stats */
 537         u64 tx_pkts;
 538         u64 rx_pkts;
 539         u64 tx_bytes;
 540         u64 rx_bytes;
 541         u64 tx_dropped;
 542         u64 tx_failed;
 543 };
 544
 545
 546 struct hwsim_radiotap_hdr {
 547         struct ieee80211_radiotap_header hdr;
 548         __le64 rt_tsft;
 549         u8 rt_flags;
 550         u8 rt_rate;
 551         __le16 rt_channel;
 552         __le16 rt_chbitmask;
 553 } __packed;
 554
 555 struct hwsim_radiotap_ack_hdr {
 556         struct ieee80211_radiotap_header hdr;
 557         u8 rt_flags;
 558         u8 pad;
 559         __le16 rt_channel;
 560         __le16 rt_chbitmask;
 561 } __packed;
 562
 563 /* MAC80211_HWSIM netlinf family */
 564 static struct genl_family hwsim_genl_family = {
 565         .id = GENL_ID_GENERATE,
 566         .hdrsize = 0,
 567         .name = "MAC80211_HWSIM",
 568         .version = 1,
 569         .maxattr = HWSIM_ATTR_MAX,
 570 };
 571
 572 enum hwsim_multicast_groups {
 573         HWSIM_MCGRP_CONFIG,
 574 };
 575
 576 static const struct genl_multicast_group hwsim_mcgrps[] = {
 577         [HWSIM_MCGRP_CONFIG] = { .name = "config", },
 578 };
 579
 580 /* MAC80211_HWSIM netlink policy */
 581
 582 static const struct nla_policy hwsim_genl_policy[HWSIM_ATTR_MAX + 1] = {
 583         [HWSIM_ATTR_ADDR_RECEIVER] = { .type = NLA_UNSPEC, .len = ETH_ALEN },
 584         [HWSIM_ATTR_ADDR_TRANSMITTER] = { .type = NLA_UNSPEC, .len = ETH_ALEN },
 585         [HWSIM_ATTR_FRAME] = { .type = NLA_BINARY,
 586                                .len = IEEE80211_MAX_DATA_LEN },
 587         [HWSIM_ATTR_FLAGS] = { .type = NLA_U32 },
 588         [HWSIM_ATTR_RX_RATE] = { .type = NLA_U32 },
 589         [HWSIM_ATTR_SIGNAL] = { .type = NLA_U32 },
 590         [HWSIM_ATTR_TX_INFO] = { .type = NLA_UNSPEC,
 591                                  .len = IEEE80211_TX_MAX_RATES *
 592                                         sizeof(struct hwsim_tx_rate)},
 593         [HWSIM_ATTR_COOKIE] = { .type = NLA_U64 },
 594         [HWSIM_ATTR_CHANNELS] = { .type = NLA_U32 },
 595         [HWSIM_ATTR_RADIO_ID] = { .type = NLA_U32 },
 596         [HWSIM_ATTR_REG_HINT_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 597         [HWSIM_ATTR_REG_CUSTOM_REG] = { .type = NLA_U32 },
 598         [HWSIM_ATTR_REG_STRICT_REG] = { .type = NLA_FLAG },
 599         [HWSIM_ATTR_SUPPORT_P2P_DEVICE] = { .type = NLA_FLAG },
 600         [HWSIM_ATTR_DESTROY_RADIO_ON_CLOSE] = { .type = NLA_FLAG },
 601         [HWSIM_ATTR_RADIO_NAME] = { .type = NLA_STRING },
 602         [HWSIM_ATTR_NO_VIF] = { .type = NLA_FLAG },
 603         [HWSIM_ATTR_FREQ] = { .type = NLA_U32 },
 604 };
 605
 606 static void mac80211_hwsim_tx_frame(struct ieee80211_hw *hw,
 607                                     struct sk_buff *skb,
 608                                     struct ieee80211_channel *chan);
 609
 610 /* sysfs attributes */
 611 static void hwsim_send_ps_poll(void *dat, u8 *mac, struct ieee80211_vif *vif)
 612 {
 613         struct mac80211_hwsim_data *data = dat;
 614         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 615         struct sk_buff *skb;
 616         struct ieee80211_pspoll *pspoll;
 617
 618         if (!vp->assoc)
 619                 return;
 620
 621         wiphy_debug(data->hw->wiphy,
 622                     "%s: send PS-Poll to %pM for aid %d\n",
 623                     __func__, vp->bssid, vp->aid);
 624
 625         skb = dev_alloc_skb(sizeof(*pspoll));
 626         if (!skb)
 627                 return;
 628         pspoll = (void *) skb_put(skb, sizeof(*pspoll));
 629         pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
 630                                             IEEE80211_STYPE_PSPOLL |
 631                                             IEEE80211_FCTL_PM);
 632         pspoll->aid = cpu_to_le16(0xc000 | vp->aid);
 633         memcpy(pspoll->bssid, vp->bssid, ETH_ALEN);
 634         memcpy(pspoll->ta, mac, ETH_ALEN);
 635
 636         rcu_read_lock();
 637         mac80211_hwsim_tx_frame(data->hw, skb,
 638                                 rcu_dereference(vif->chanctx_conf)->def.chan);
 639         rcu_read_unlock();
 640 }
 641
 642 static void hwsim_send_nullfunc(struct mac80211_hwsim_data *data, u8 *mac,
 643                                 struct ieee80211_vif *vif, int ps)
 644 {
 645         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 646         struct sk_buff *skb;
 647         struct ieee80211_hdr *hdr;
 648
 649         if (!vp->assoc)
 650                 return;
 651
 652         wiphy_debug(data->hw->wiphy,
 653                     "%s: send data::nullfunc to %pM ps=%d\n",
 654                     __func__, vp->bssid, ps);
 655
 656         skb = dev_alloc_skb(sizeof(*hdr));
 657         if (!skb)
 658                 return;
 659         hdr = (void *) skb_put(skb, sizeof(*hdr) - ETH_ALEN);
 660         hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
 661                                          IEEE80211_STYPE_NULLFUNC |
 662                                          (ps ? IEEE80211_FCTL_PM : 0));
 663         hdr->duration_id = cpu_to_le16(0);
 664         memcpy(hdr->addr1, vp->bssid, ETH_ALEN);
 665         memcpy(hdr->addr2, mac, ETH_ALEN);
 666         memcpy(hdr->addr3, vp->bssid, ETH_ALEN);
 667
 668         rcu_read_lock();
 669         mac80211_hwsim_tx_frame(data->hw, skb,
 670                                 rcu_dereference(vif->chanctx_conf)->def.chan);
 671         rcu_read_unlock();
 672 }
 673
 674
 675 static void hwsim_send_nullfunc_ps(void *dat, u8 *mac,
 676                                    struct ieee80211_vif *vif)
 677 {
 678         struct mac80211_hwsim_data *data = dat;
 679         hwsim_send_nullfunc(data, mac, vif, 1);
 680 }
 681
 682 static void hwsim_send_nullfunc_no_ps(void *dat, u8 *mac,
 683                                       struct ieee80211_vif *vif)
 684 {
 685         struct mac80211_hwsim_data *data = dat;
 686         hwsim_send_nullfunc(data, mac, vif, 0);
 687 }
 688
 689 static int hwsim_fops_ps_read(void *dat, u64 *val)
 690 {
 691         struct mac80211_hwsim_data *data = dat;
 692         *val = data->ps;
 693         return 0;
 694 }
 695
 696 static int hwsim_fops_ps_write(void *dat, u64 val)
 697 {
 698         struct mac80211_hwsim_data *data = dat;
 699         enum ps_mode old_ps;
 700
 701         if (val != PS_DISABLED && val != PS_ENABLED && val != PS_AUTO_POLL &&
 702             val != PS_MANUAL_POLL)
 703                 return -EINVAL;
 704
 705         old_ps = data->ps;
 706         data->ps = val;
 707
 708         local_bh_disable();
 709         if (val == PS_MANUAL_POLL) {
 710                 ieee80211_iterate_active_interfaces_atomic(
 711                         data->hw, IEEE80211_IFACE_ITER_NORMAL,
 712                         hwsim_send_ps_poll, data);
 713                 data->ps_poll_pending = true;
 714         } else if (old_ps == PS_DISABLED && val != PS_DISABLED) {
 715                 ieee80211_iterate_active_interfaces_atomic(
 716                         data->hw, IEEE80211_IFACE_ITER_NORMAL,
 717                         hwsim_send_nullfunc_ps, data);
 718         } else if (old_ps != PS_DISABLED && val == PS_DISABLED) {
 719                 ieee80211_iterate_active_interfaces_atomic(
 720                         data->hw, IEEE80211_IFACE_ITER_NORMAL,
 721                         hwsim_send_nullfunc_no_ps, data);
 722         }
 723         local_bh_enable();
 724
 725         return 0;
 726 }
 727
 728 DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_ps, hwsim_fops_ps_read, hwsim_fops_ps_write,
 729                         "%llu\n");
 730
 731 static int hwsim_write_simulate_radar(void *dat, u64 val)
 732 {
 733         struct mac80211_hwsim_data *data = dat;
 734
 735         ieee80211_radar_detected(data->hw);
 736
 737         return 0;
 738 }
 739
 740 DEFINE_SIMPLE_ATTRIBUTE(hwsim_simulate_radar, NULL,
 741                         hwsim_write_simulate_radar, "%llu\n");
 742
 743 static int hwsim_fops_group_read(void *dat, u64 *val)
 744 {
 745         struct mac80211_hwsim_data *data = dat;
 746         *val = data->group;
 747         return 0;
 748 }
 749
 750 static int hwsim_fops_group_write(void *dat, u64 val)
 751 {
 752         struct mac80211_hwsim_data *data = dat;
 753         data->group = val;
 754         return 0;
 755 }
 756
 757 DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_group,
 758                         hwsim_fops_group_read, hwsim_fops_group_write,
 759                         "%llx\n");
 760
 761 static netdev_tx_t hwsim_mon_xmit(struct sk_buff *skb,
 762                                         struct net_device *dev)
 763 {
 764         /* TODO: allow packet injection */
 765         dev_kfree_skb(skb);
 766         return NETDEV_TX_OK;
 767 }
 768
 769 static inline u64 mac80211_hwsim_get_tsf_raw(void)
 770 {
 771         return ktime_to_us(ktime_get_real());
 772 }
 773
 774 static __le64 __mac80211_hwsim_get_tsf(struct mac80211_hwsim_data *data)
 775 {
 776         u64 now = mac80211_hwsim_get_tsf_raw();
 777         return cpu_to_le64(now + data->tsf_offset);
 778 }
 779
 780 static u64 mac80211_hwsim_get_tsf(struct ieee80211_hw *hw,
 781                                   struct ieee80211_vif *vif)
 782 {
 783         struct mac80211_hwsim_data *data = hw->priv;
 784         return le64_to_cpu(__mac80211_hwsim_get_tsf(data));
 785 }
 786
 787 static void mac80211_hwsim_set_tsf(struct ieee80211_hw *hw,
 788                 struct ieee80211_vif *vif, u64 tsf)
 789 {
 790         struct mac80211_hwsim_data *data = hw->priv;
 791         u64 now = mac80211_hwsim_get_tsf(hw, vif);
 792         u32 bcn_int = data->beacon_int;
 793         u64 delta = abs(tsf - now);
 794
 795         /* adjust after beaconing with new timestamp at old TBTT */
 796         if (tsf > now) {
 797                 data->tsf_offset += delta;
 798                 data->bcn_delta = do_div(delta, bcn_int);
 799         } else {
 800                 data->tsf_offset -= delta;
 801                 data->bcn_delta = -do_div(delta, bcn_int);
 802         }
 803 }
 804
 805 static void mac80211_hwsim_monitor_rx(struct ieee80211_hw *hw,
 806                                       struct sk_buff *tx_skb,
 807                                       struct ieee80211_channel *chan)
 808 {
 809         struct mac80211_hwsim_data *data = hw->priv;
 810         struct sk_buff *skb;
 811         struct hwsim_radiotap_hdr *hdr;
 812         u16 flags;
 813         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_skb);
 814         struct ieee80211_rate *txrate = ieee80211_get_tx_rate(hw, info);
 815
 816         if (!netif_running(hwsim_mon))
 817                 return;
 818
 819         skb = skb_copy_expand(tx_skb, sizeof(*hdr), 0, GFP_ATOMIC);
 820         if (skb == NULL)
 821                 return;
 822
 823         hdr = (struct hwsim_radiotap_hdr *) skb_push(skb, sizeof(*hdr));
 824         hdr->hdr.it_version = PKTHDR_RADIOTAP_VERSION;
 825         hdr->hdr.it_pad = 0;
 826         hdr->hdr.it_len = cpu_to_le16(sizeof(*hdr));
 827         hdr->hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
 828                                           (1 << IEEE80211_RADIOTAP_RATE) |
 829                                           (1 << IEEE80211_RADIOTAP_TSFT) |
 830                                           (1 << IEEE80211_RADIOTAP_CHANNEL));
 831         hdr->rt_tsft = __mac80211_hwsim_get_tsf(data);
 832         hdr->rt_flags = 0;
 833         hdr->rt_rate = txrate->bitrate / 5;
 834         hdr->rt_channel = cpu_to_le16(chan->center_freq);
 835         flags = IEEE80211_CHAN_2GHZ;
 836         if (txrate->flags & IEEE80211_RATE_ERP_G)
 837                 flags |= IEEE80211_CHAN_OFDM;
 838         else
 839                 flags |= IEEE80211_CHAN_CCK;
 840         hdr->rt_chbitmask = cpu_to_le16(flags);
 841
 842         skb->dev = hwsim_mon;
 843         skb_set_mac_header(skb, 0);
 844         skb->ip_summed = CHECKSUM_UNNECESSARY;
 845         skb->pkt_type = PACKET_OTHERHOST;
 846         skb->protocol = htons(ETH_P_802_2);
 847         memset(skb->cb, 0, sizeof(skb->cb));
 848         netif_rx(skb);
 849 }
 850
 851
 852 static void mac80211_hwsim_monitor_ack(struct ieee80211_channel *chan,
 853                                        const u8 *addr)
 854 {
 855         struct sk_buff *skb;
 856         struct hwsim_radiotap_ack_hdr *hdr;
 857         u16 flags;
 858         struct ieee80211_hdr *hdr11;
 859
 860         if (!netif_running(hwsim_mon))
 861                 return;
 862
 863         skb = dev_alloc_skb(100);
 864         if (skb == NULL)
 865                 return;
 866
 867         hdr = (struct hwsim_radiotap_ack_hdr *) skb_put(skb, sizeof(*hdr));
 868         hdr->hdr.it_version = PKTHDR_RADIOTAP_VERSION;
 869         hdr->hdr.it_pad = 0;
 870         hdr->hdr.it_len = cpu_to_le16(sizeof(*hdr));
 871         hdr->hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
 872                                           (1 << IEEE80211_RADIOTAP_CHANNEL));
 873         hdr->rt_flags = 0;
 874         hdr->pad = 0;
 875         hdr->rt_channel = cpu_to_le16(chan->center_freq);
 876         flags = IEEE80211_CHAN_2GHZ;
 877         hdr->rt_chbitmask = cpu_to_le16(flags);
 878
 879         hdr11 = (struct ieee80211_hdr *) skb_put(skb, 10);
 880         hdr11->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
 881                                            IEEE80211_STYPE_ACK);
 882         hdr11->duration_id = cpu_to_le16(0);
 883         memcpy(hdr11->addr1, addr, ETH_ALEN);
 884
 885         skb->dev = hwsim_mon;
 886         skb_set_mac_header(skb, 0);
 887         skb->ip_summed = CHECKSUM_UNNECESSARY;
 888         skb->pkt_type = PACKET_OTHERHOST;
 889         skb->protocol = htons(ETH_P_802_2);
 890         memset(skb->cb, 0, sizeof(skb->cb));
 891         netif_rx(skb);
 892 }
 893
 894 struct mac80211_hwsim_addr_match_data {
 895         u8 addr[ETH_ALEN];
 896         bool ret;
 897 };
 898
 899 static void mac80211_hwsim_addr_iter(void *data, u8 *mac,
 900                                      struct ieee80211_vif *vif)
 901 {
 902         struct mac80211_hwsim_addr_match_data *md = data;
 903
 904         if (memcmp(mac, md->addr, ETH_ALEN) == 0)
 905                 md->ret = true;
 906 }
 907
 908 static bool mac80211_hwsim_addr_match(struct mac80211_hwsim_data *data,
 909                                       const u8 *addr)
 910 {
 911         struct mac80211_hwsim_addr_match_data md = {
 912                 .ret = false,
 913         };
 914
 915         if (data->scanning && memcmp(addr, data->scan_addr, ETH_ALEN) == 0)
 916                 return true;
 917
 918         memcpy(md.addr, addr, ETH_ALEN);
 919
 920         ieee80211_iterate_active_interfaces_atomic(data->hw,
 921                                                    IEEE80211_IFACE_ITER_NORMAL,
 922                                                    mac80211_hwsim_addr_iter,
 923                                                    &md);
 924
 925         return md.ret;
 926 }
 927
 928 static bool hwsim_ps_rx_ok(struct mac80211_hwsim_data *data,
 929                            struct sk_buff *skb)
 930 {
 931         switch (data->ps) {
 932         case PS_DISABLED:
 933                 return true;
 934         case PS_ENABLED:
 935                 return false;
 936         case PS_AUTO_POLL:
 937                 /* TODO: accept (some) Beacons by default and other frames only
 938                  * if pending PS-Poll has been sent */
 939                 return true;
 940         case PS_MANUAL_POLL:
 941                 /* Allow unicast frames to own address if there is a pending
 942                  * PS-Poll */
 943                 if (data->ps_poll_pending &&
 944                     mac80211_hwsim_addr_match(data, skb->data + 4)) {
 945                         data->ps_poll_pending = false;
 946                         return true;
 947                 }
 948                 return false;
 949         }
 950
 951         return true;
 952 }
 953
 954 static void mac80211_hwsim_tx_frame_nl(struct ieee80211_hw *hw,
 955                                        struct sk_buff *my_skb,
 956                                        int dst_portid)
 957 {
 958         struct sk_buff *skb;
 959         struct mac80211_hwsim_data *data = hw->priv;
 960         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) my_skb->data;
 961         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(my_skb);
 962         void *msg_head;
 963         unsigned int hwsim_flags = 0;
 964         int i;
 965         struct hwsim_tx_rate tx_attempts[IEEE80211_TX_MAX_RATES];
 966
 967         if (data->ps != PS_DISABLED)
 968                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 969         /* If the queue contains MAX_QUEUE skb's drop some */
 970         if (skb_queue_len(&data->pending) >= MAX_QUEUE) {
 971                 /* Droping until WARN_QUEUE level */
 972                 while (skb_queue_len(&data->pending) >= WARN_QUEUE) {
 973                         ieee80211_free_txskb(hw, skb_dequeue(&data->pending));
 974                         data->tx_dropped++;
 975                 }
 976         }
 977
 978         skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_ATOMIC);
 979         if (skb == NULL)
 980                 goto nla_put_failure;
 981
 982         msg_head = genlmsg_put(skb, 0, 0, &hwsim_genl_family, 0,
 983                                HWSIM_CMD_FRAME);
 984         if (msg_head == NULL) {
 985                 printk(KERN_DEBUG "mac80211_hwsim: problem with msg_head\n");
 986                 goto nla_put_failure;
 987         }
 988
 989         if (nla_put(skb, HWSIM_ATTR_ADDR_TRANSMITTER, ETH_ALEN, hdr->addr2))
 990                 goto nla_put_failure;
 991
 992         /* We get the skb->data */
 993         if (nla_put(skb, HWSIM_ATTR_FRAME, my_skb->len, my_skb->data))
 994                 goto nla_put_failure;
 995
 996         /* We get the flags for this transmission, and we translate them to
 997            wmediumd flags  */
 998
 999         if (info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS)
1000                 hwsim_flags |= HWSIM_TX_CTL_REQ_TX_STATUS;
1001
1002         if (info->flags & IEEE80211_TX_CTL_NO_ACK)
1003                 hwsim_flags |= HWSIM_TX_CTL_NO_ACK;
1004
1005         if (nla_put_u32(skb, HWSIM_ATTR_FLAGS, hwsim_flags))
1006                 goto nla_put_failure;
1007
1008         if (nla_put_u32(skb, HWSIM_ATTR_FREQ, data->channel->center_freq))
1009                 goto nla_put_failure;
1010
1011         /* We get the tx control (rate and retries) info*/
1012
1013         for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
1014                 tx_attempts[i].idx = info->status.rates[i].idx;
1015                 tx_attempts[i].count = info->status.rates[i].count;
1016         }
1017
1018         if (nla_put(skb, HWSIM_ATTR_TX_INFO,
1019                     sizeof(struct hwsim_tx_rate)*IEEE80211_TX_MAX_RATES,
1020                     tx_attempts))
1021                 goto nla_put_failure;
1022
1023         /* We create a cookie to identify this skb */
1024         if (nla_put_u64(skb, HWSIM_ATTR_COOKIE, (unsigned long) my_skb))
1025                 goto nla_put_failure;
1026
1027         genlmsg_end(skb, msg_head);
1028         if (genlmsg_unicast(&init_net, skb, dst_portid))
1029                 goto err_free_txskb;
1030
1031         /* Enqueue the packet */
1032         skb_queue_tail(&data->pending, my_skb);
1033         data->tx_pkts++;
1034         data->tx_bytes += my_skb->len;
1035         return;
1036
1037 nla_put_failure:
1038         nlmsg_free(skb);
1039 err_free_txskb:
1040         printk(KERN_DEBUG "mac80211_hwsim: error occurred in %s\n", __func__);
1041         ieee80211_free_txskb(hw, my_skb);
1042         data->tx_failed++;
1043 }
1044
1045 static bool hwsim_chans_compat(struct ieee80211_channel *c1,
1046                                struct ieee80211_channel *c2)
1047 {
1048         if (!c1 || !c2)
1049                 return false;
1050
1051         return c1->center_freq == c2->center_freq;
1052 }
1053
1054 struct tx_iter_data {
1055         struct ieee80211_channel *channel;
1056         bool receive;
1057 };
1058
1059 static void mac80211_hwsim_tx_iter(void *_data, u8 *addr,
1060                                    struct ieee80211_vif *vif)
1061 {
1062         struct tx_iter_data *data = _data;
1063
1064         if (!vif->chanctx_conf)
1065                 return;
1066
1067         if (!hwsim_chans_compat(data->channel,
1068                                 rcu_dereference(vif->chanctx_conf)->def.chan))
1069                 return;
1070
1071         data->receive = true;
1072 }
1073
1074 static void mac80211_hwsim_add_vendor_rtap(struct sk_buff *skb)
1075 {
1076         /*
1077          * To enable this code, #define the HWSIM_RADIOTAP_OUI,
1078          * e.g. like this:
1079          * #define HWSIM_RADIOTAP_OUI "\x02\x00\x00"
1080          * (but you should use a valid OUI, not that)
1081          *
1082          * If anyone wants to 'donate' a radiotap OUI/subns code
1083          * please send a patch removing this #ifdef and changing
1084          * the values accordingly.
1085          */
1086 #ifdef HWSIM_RADIOTAP_OUI
1087         struct ieee80211_vendor_radiotap *rtap;
1088
1089         /*
1090          * Note that this code requires the headroom in the SKB
1091          * that was allocated earlier.
1092          */
1093         rtap = (void *)skb_push(skb, sizeof(*rtap) + 8 + 4);
1094         rtap->oui[0] = HWSIM_RADIOTAP_OUI[0];
1095         rtap->oui[1] = HWSIM_RADIOTAP_OUI[1];
1096         rtap->oui[2] = HWSIM_RADIOTAP_OUI[2];
1097         rtap->subns = 127;
1098
1099         /*
1100          * Radiotap vendor namespaces can (and should) also be
1101          * split into fields by using the standard radiotap
1102          * presence bitmap mechanism. Use just BIT(0) here for
1103          * the presence bitmap.
1104          */
1105         rtap->present = BIT(0);
1106         /* We have 8 bytes of (dummy) data */
1107         rtap->len = 8;
1108         /* For testing, also require it to be aligned */
1109         rtap->align = 8;
1110         /* And also test that padding works, 4 bytes */
1111         rtap->pad = 4;
1112         /* push the data */
1113         memcpy(rtap->data, "ABCDEFGH", 8);
1114         /* make sure to clear padding, mac80211 doesn't */
1115         memset(rtap->data + 8, 0, 4);
1116
1117         IEEE80211_SKB_RXCB(skb)->flag |= RX_FLAG_RADIOTAP_VENDOR_DATA;
1118 #endif
1119 }
1120
1121 static bool mac80211_hwsim_tx_frame_no_nl(struct ieee80211_hw *hw,
1122                                           struct sk_buff *skb,
1123                                           struct ieee80211_channel *chan)
1124 {
1125         struct mac80211_hwsim_data *data = hw->priv, *data2;
1126         bool ack = false;
1127         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1128         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1129         struct ieee80211_rx_status rx_status;
1130         u64 now;
1131
1132         memset(&rx_status, 0, sizeof(rx_status));
1133         rx_status.flag |= RX_FLAG_MACTIME_START;
1134         rx_status.freq = chan->center_freq;
1135         rx_status.band = chan->band;
1136         if (info->control.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) {
1137                 rx_status.rate_idx =
1138                         ieee80211_rate_get_vht_mcs(&info->control.rates[0]);
1139                 rx_status.vht_nss =
1140                         ieee80211_rate_get_vht_nss(&info->control.rates[0]);
1141                 rx_status.flag |= RX_FLAG_VHT;
1142         } else {
1143                 rx_status.rate_idx = info->control.rates[0].idx;
1144                 if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS)
1145                         rx_status.flag |= RX_FLAG_HT;
1146         }
1147         if (info->control.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
1148                 rx_status.flag |= RX_FLAG_40MHZ;
1149         if (info->control.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
1150                 rx_status.flag |= RX_FLAG_SHORT_GI;
1151         /* TODO: simulate real signal strength (and optional packet loss) */
1152         rx_status.signal = data->power_level - 50;
1153
1154         if (data->ps != PS_DISABLED)
1155                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
1156
1157         /* release the skb's source info */
1158         skb_orphan(skb);
1159         skb_dst_drop(skb);
1160         skb->mark = 0;
1161         secpath_reset(skb);
1162         nf_reset(skb);
1163
1164         /*
1165          * Get absolute mactime here so all HWs RX at the "same time", and
1166          * absolute TX time for beacon mactime so the timestamp matches.
1167          * Giving beacons a different mactime than non-beacons looks messy, but
1168          * it helps the Toffset be exact and a ~10us mactime discrepancy
1169          * probably doesn't really matter.
1170          */
1171         if (ieee80211_is_beacon(hdr->frame_control) ||
1172             ieee80211_is_probe_resp(hdr->frame_control))
1173                 now = data->abs_bcn_ts;
1174         else
1175                 now = mac80211_hwsim_get_tsf_raw();
1176
1177         /* Copy skb to all enabled radios that are on the current frequency */
1178         spin_lock(&hwsim_radio_lock);
1179         list_for_each_entry(data2, &hwsim_radios, list) {
1180                 struct sk_buff *nskb;
1181                 struct tx_iter_data tx_iter_data = {
1182                         .receive = false,
1183                         .channel = chan,
1184                 };
1185
1186                 if (data == data2)
1187                         continue;
1188
1189                 if (!data2->started || (data2->idle && !data2->tmp_chan) ||
1190                     !hwsim_ps_rx_ok(data2, skb))
1191                         continue;
1192
1193                 if (!(data->group & data2->group))
1194                         continue;
1195
1196                 if (!hwsim_chans_compat(chan, data2->tmp_chan) &&
1197                     !hwsim_chans_compat(chan, data2->channel)) {
1198                         ieee80211_iterate_active_interfaces_atomic(
1199                                 data2->hw, IEEE80211_IFACE_ITER_NORMAL,
1200                                 mac80211_hwsim_tx_iter, &tx_iter_data);
1201                         if (!tx_iter_data.receive)
1202                                 continue;
1203                 }
1204
1205                 /*
1206                  * reserve some space for our vendor and the normal
1207                  * radiotap header, since we're copying anyway
1208                  */
1209                 if (skb->len < PAGE_SIZE && paged_rx) {
1210                         struct page *page = alloc_page(GFP_ATOMIC);
1211
1212                         if (!page)
1213                                 continue;
1214
1215                         nskb = dev_alloc_skb(128);
1216                         if (!nskb) {
1217                                 __free_page(page);
1218                                 continue;
1219                         }
1220
1221                         memcpy(page_address(page), skb->data, skb->len);
1222                         skb_add_rx_frag(nskb, 0, page, 0, skb->len, skb->len);
1223                 } else {
1224                         nskb = skb_copy(skb, GFP_ATOMIC);
1225                         if (!nskb)
1226                                 continue;
1227                 }
1228
1229                 if (mac80211_hwsim_addr_match(data2, hdr->addr1))
1230                         ack = true;
1231
1232                 rx_status.mactime = now + data2->tsf_offset;
1233
1234                 memcpy(IEEE80211_SKB_RXCB(nskb), &rx_status, sizeof(rx_status));
1235
1236                 mac80211_hwsim_add_vendor_rtap(nskb);
1237
1238                 data2->rx_pkts++;
1239                 data2->rx_bytes += nskb->len;
1240                 ieee80211_rx_irqsafe(data2->hw, nskb);
1241         }
1242         spin_unlock(&hwsim_radio_lock);
1243
1244         return ack;
1245 }
1246
1247 static void mac80211_hwsim_tx(struct ieee80211_hw *hw,
1248                               struct ieee80211_tx_control *control,
1249                               struct sk_buff *skb)
1250 {
1251         struct mac80211_hwsim_data *data = hw->priv;
1252         struct ieee80211_tx_info *txi = IEEE80211_SKB_CB(skb);
1253         struct ieee80211_chanctx_conf *chanctx_conf;
1254         struct ieee80211_channel *channel;
1255         bool ack;
1256         u32 _portid;
1257
1258         if (WARN_ON(skb->len < 10)) {
1259                 /* Should not happen; just a sanity check for addr1 use */
1260                 ieee80211_free_txskb(hw, skb);
1261                 return;
1262         }
1263
1264         if (!data->use_chanctx) {
1265                 channel = data->channel;
1266         } else if (txi->hw_queue == 4) {
1267                 channel = data->tmp_chan;
1268         } else {
1269                 chanctx_conf = rcu_dereference(txi->control.vif->chanctx_conf);
1270                 if (chanctx_conf)
1271                         channel = chanctx_conf->def.chan;
1272                 else
1273                         channel = NULL;
1274         }
1275
1276         if (WARN(!channel, "TX w/o channel - queue = %d\n", txi->hw_queue)) {
1277                 ieee80211_free_txskb(hw, skb);
1278                 return;
1279         }
1280
1281         if (data->idle && !data->tmp_chan) {
1282                 wiphy_debug(hw->wiphy, "Trying to TX when idle - reject\n");
1283                 ieee80211_free_txskb(hw, skb);
1284                 return;
1285         }
1286
1287         if (txi->control.vif)
1288                 hwsim_check_magic(txi->control.vif);
1289         if (control->sta)
1290                 hwsim_check_sta_magic(control->sta);
1291
1292         if (ieee80211_hw_check(hw, SUPPORTS_RC_TABLE))
1293                 ieee80211_get_tx_rates(txi->control.vif, control->sta, skb,
1294                                        txi->control.rates,
1295                                        ARRAY_SIZE(txi->control.rates));
1296
1297         txi->rate_driver_data[0] = channel;
1298         mac80211_hwsim_monitor_rx(hw, skb, channel);
1299
1300         /* wmediumd mode check */
1301         _portid = ACCESS_ONCE(wmediumd_portid);
1302
1303         if (_portid)
1304                 return mac80211_hwsim_tx_frame_nl(hw, skb, _portid);
1305
1306         /* NO wmediumd detected, perfect medium simulation */
1307         data->tx_pkts++;
1308         data->tx_bytes += skb->len;
1309         ack = mac80211_hwsim_tx_frame_no_nl(hw, skb, channel);
1310
1311         if (ack && skb->len >= 16) {
1312                 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1313                 mac80211_hwsim_monitor_ack(channel, hdr->addr2);
1314         }
1315
1316         ieee80211_tx_info_clear_status(txi);
1317
1318         /* frame was transmitted at most favorable rate at first attempt */
1319         txi->control.rates[0].count = 1;
1320         txi->control.rates[1].idx = -1;
1321
1322         if (!(txi->flags & IEEE80211_TX_CTL_NO_ACK) && ack)
1323                 txi->flags |= IEEE80211_TX_STAT_ACK;
1324         ieee80211_tx_status_irqsafe(hw, skb);
1325 }
1326
1327
1328 static int mac80211_hwsim_start(struct ieee80211_hw *hw)
1329 {
1330         struct mac80211_hwsim_data *data = hw->priv;
1331         wiphy_debug(hw->wiphy, "%s\n", __func__);
1332         data->started = true;
1333         return 0;
1334 }
1335
1336
1337 static void mac80211_hwsim_stop(struct ieee80211_hw *hw)
1338 {
1339         struct mac80211_hwsim_data *data = hw->priv;
1340         data->started = false;
1341         tasklet_hrtimer_cancel(&data->beacon_timer);
1342         wiphy_debug(hw->wiphy, "%s\n", __func__);
1343 }
1344
1345
1346 static int mac80211_hwsim_add_interface(struct ieee80211_hw *hw,
1347                                         struct ieee80211_vif *vif)
1348 {
1349         wiphy_debug(hw->wiphy, "%s (type=%d mac_addr=%pM)\n",
1350                     __func__, ieee80211_vif_type_p2p(vif),
1351                     vif->addr);
1352         hwsim_set_magic(vif);
1353
1354         vif->cab_queue = 0;
1355         vif->hw_queue[IEEE80211_AC_VO] = 0;
1356         vif->hw_queue[IEEE80211_AC_VI] = 1;
1357         vif->hw_queue[IEEE80211_AC_BE] = 2;
1358         vif->hw_queue[IEEE80211_AC_BK] = 3;
1359
1360         return 0;
1361 }
1362
1363
1364 static int mac80211_hwsim_change_interface(struct ieee80211_hw *hw,
1365                                            struct ieee80211_vif *vif,
1366                                            enum nl80211_iftype newtype,
1367                                            bool newp2p)
1368 {
1369         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1370         wiphy_debug(hw->wiphy,
1371                     "%s (old type=%d, new type=%d, mac_addr=%pM)\n",
1372                     __func__, ieee80211_vif_type_p2p(vif),
1373                     newtype, vif->addr);
1374         hwsim_check_magic(vif);
1375
1376         /*
1377          * interface may change from non-AP to AP in
1378          * which case this needs to be set up again
1379          */
1380         vif->cab_queue = 0;
1381
1382         return 0;
1383 }
1384
1385 static void mac80211_hwsim_remove_interface(
1386         struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1387 {
1388         wiphy_debug(hw->wiphy, "%s (type=%d mac_addr=%pM)\n",
1389                     __func__, ieee80211_vif_type_p2p(vif),
1390                     vif->addr);
1391         hwsim_check_magic(vif);
1392         hwsim_clear_magic(vif);
1393 }
1394
1395 static void mac80211_hwsim_tx_frame(struct ieee80211_hw *hw,
1396                                     struct sk_buff *skb,
1397                                     struct ieee80211_channel *chan)
1398 {
1399         u32 _pid = ACCESS_ONCE(wmediumd_portid);
1400
1401         if (ieee80211_hw_check(hw, SUPPORTS_RC_TABLE)) {
1402                 struct ieee80211_tx_info *txi = IEEE80211_SKB_CB(skb);
1403                 ieee80211_get_tx_rates(txi->control.vif, NULL, skb,
1404                                        txi->control.rates,
1405                                        ARRAY_SIZE(txi->control.rates));
1406         }
1407
1408         mac80211_hwsim_monitor_rx(hw, skb, chan);
1409
1410         if (_pid)
1411                 return mac80211_hwsim_tx_frame_nl(hw, skb, _pid);
1412
1413         mac80211_hwsim_tx_frame_no_nl(hw, skb, chan);
1414         dev_kfree_skb(skb);
1415 }
1416
1417 static void mac80211_hwsim_beacon_tx(void *arg, u8 *mac,
1418                                      struct ieee80211_vif *vif)
1419 {
1420         struct mac80211_hwsim_data *data = arg;
1421         struct ieee80211_hw *hw = data->hw;
1422         struct ieee80211_tx_info *info;
1423         struct ieee80211_rate *txrate;
1424         struct ieee80211_mgmt *mgmt;
1425         struct sk_buff *skb;
1426
1427         hwsim_check_magic(vif);
1428
1429         if (vif->type != NL80211_IFTYPE_AP &&
1430             vif->type != NL80211_IFTYPE_MESH_POINT &&
1431             vif->type != NL80211_IFTYPE_ADHOC)
1432                 return;
1433
1434         skb = ieee80211_beacon_get(hw, vif);
1435         if (skb == NULL)
1436                 return;
1437         info = IEEE80211_SKB_CB(skb);
1438         if (ieee80211_hw_check(hw, SUPPORTS_RC_TABLE))
1439                 ieee80211_get_tx_rates(vif, NULL, skb,
1440                                        info->control.rates,
1441                                        ARRAY_SIZE(info->control.rates));
1442
1443         txrate = ieee80211_get_tx_rate(hw, info);
1444
1445         mgmt = (struct ieee80211_mgmt *) skb->data;
1446         /* fake header transmission time */
1447         data->abs_bcn_ts = mac80211_hwsim_get_tsf_raw();
1448         mgmt->u.beacon.timestamp = cpu_to_le64(data->abs_bcn_ts +
1449                                                data->tsf_offset +
1450                                                24 * 8 * 10 / txrate->bitrate);
1451
1452         mac80211_hwsim_tx_frame(hw, skb,
1453                                 rcu_dereference(vif->chanctx_conf)->def.chan);
1454
1455         if (vif->csa_active && ieee80211_csa_is_complete(vif))
1456                 ieee80211_csa_finish(vif);
1457 }
1458
1459 static enum hrtimer_restart
1460 mac80211_hwsim_beacon(struct hrtimer *timer)
1461 {
1462         struct mac80211_hwsim_data *data =
1463                 container_of(timer, struct mac80211_hwsim_data,
1464                              beacon_timer.timer);
1465         struct ieee80211_hw *hw = data->hw;
1466         u64 bcn_int = data->beacon_int;
1467         ktime_t next_bcn;
1468
1469         if (!data->started)
1470                 goto out;
1471
1472         ieee80211_iterate_active_interfaces_atomic(
1473                 hw, IEEE80211_IFACE_ITER_NORMAL,
1474                 mac80211_hwsim_beacon_tx, data);
1475
1476         /* beacon at new TBTT + beacon interval */
1477         if (data->bcn_delta) {
1478                 bcn_int -= data->bcn_delta;
1479                 data->bcn_delta = 0;
1480         }
1481
1482         next_bcn = ktime_add(hrtimer_get_expires(timer),
1483                              ns_to_ktime(bcn_int * 1000));
1484         tasklet_hrtimer_start(&data->beacon_timer, next_bcn, HRTIMER_MODE_ABS);
1485 out:
1486         return HRTIMER_NORESTART;
1487 }
1488
1489 static const char * const hwsim_chanwidths[] = {
1490         [NL80211_CHAN_WIDTH_20_NOHT] = "noht",
1491         [NL80211_CHAN_WIDTH_20] = "ht20",
1492         [NL80211_CHAN_WIDTH_40] = "ht40",
1493         [NL80211_CHAN_WIDTH_80] = "vht80",
1494         [NL80211_CHAN_WIDTH_80P80] = "vht80p80",
1495         [NL80211_CHAN_WIDTH_160] = "vht160",
1496 };
1497
1498 static int mac80211_hwsim_config(struct ieee80211_hw *hw, u32 changed)
1499 {
1500         struct mac80211_hwsim_data *data = hw->priv;
1501         struct ieee80211_conf *conf = &hw->conf;
1502         static const char *smps_modes[IEEE80211_SMPS_NUM_MODES] = {
1503                 [IEEE80211_SMPS_AUTOMATIC] = "auto",
1504                 [IEEE80211_SMPS_OFF] = "off",
1505                 [IEEE80211_SMPS_STATIC] = "static",
1506                 [IEEE80211_SMPS_DYNAMIC] = "dynamic",
1507         };
1508
1509         if (conf->chandef.chan)
1510                 wiphy_debug(hw->wiphy,
1511                             "%s (freq=%d(%d - %d)/%s idle=%d ps=%d smps=%s)\n",
1512                             __func__,
1513                             conf->chandef.chan->center_freq,
1514                             conf->chandef.center_freq1,
1515                             conf->chandef.center_freq2,
1516                             hwsim_chanwidths[conf->chandef.width],
1517                             !!(conf->flags & IEEE80211_CONF_IDLE),
1518                             !!(conf->flags & IEEE80211_CONF_PS),
1519                             smps_modes[conf->smps_mode]);
1520         else
1521                 wiphy_debug(hw->wiphy,
1522                             "%s (freq=0 idle=%d ps=%d smps=%s)\n",
1523                             __func__,
1524                             !!(conf->flags & IEEE80211_CONF_IDLE),
1525                             !!(conf->flags & IEEE80211_CONF_PS),
1526                             smps_modes[conf->smps_mode]);
1527
1528         data->idle = !!(conf->flags & IEEE80211_CONF_IDLE);
1529
1530         data->channel = conf->chandef.chan;
1531
1532         WARN_ON(data->channel && data->use_chanctx);
1533
1534         data->power_level = conf->power_level;
1535         if (!data->started || !data->beacon_int)
1536                 tasklet_hrtimer_cancel(&data->beacon_timer);
1537         else if (!hrtimer_is_queued(&data->beacon_timer.timer)) {
1538                 u64 tsf = mac80211_hwsim_get_tsf(hw, NULL);
1539                 u32 bcn_int = data->beacon_int;
1540                 u64 until_tbtt = bcn_int - do_div(tsf, bcn_int);
1541
1542                 tasklet_hrtimer_start(&data->beacon_timer,
1543                                       ns_to_ktime(until_tbtt * 1000),
1544                                       HRTIMER_MODE_REL);
1545         }
1546
1547         return 0;
1548 }
1549
1550
1551 static void mac80211_hwsim_configure_filter(struct ieee80211_hw *hw,
1552                                             unsigned int changed_flags,
1553                                             unsigned int *total_flags,u64 multicast)
1554 {
1555         struct mac80211_hwsim_data *data = hw->priv;
1556
1557         wiphy_debug(hw->wiphy, "%s\n", __func__);
1558
1559         data->rx_filter = 0;
1560         if (*total_flags & FIF_ALLMULTI)
1561                 data->rx_filter |= FIF_ALLMULTI;
1562
1563         *total_flags = data->rx_filter;
1564 }
1565
1566 static void mac80211_hwsim_bcn_en_iter(void *data, u8 *mac,
1567                                        struct ieee80211_vif *vif)
1568 {
1569         unsigned int *count = data;
1570         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
1571
1572         if (vp->bcn_en)
1573                 (*count)++;
1574 }
1575
1576 static void mac80211_hwsim_bss_info_changed(struct ieee80211_hw *hw,
1577                                             struct ieee80211_vif *vif,
1578                                             struct ieee80211_bss_conf *info,
1579                                             u32 changed)
1580 {
1581         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
1582         struct mac80211_hwsim_data *data = hw->priv;
1583
1584         hwsim_check_magic(vif);
1585
1586         wiphy_debug(hw->wiphy, "%s(changed=0x%x vif->addr=%pM)\n",
1587                     __func__, changed, vif->addr);
1588
1589         if (changed & BSS_CHANGED_BSSID) {
1590                 wiphy_debug(hw->wiphy, "%s: BSSID changed: %pM\n",
1591                             __func__, info->bssid);
1592                 memcpy(vp->bssid, info->bssid, ETH_ALEN);
1593         }
1594
1595         if (changed & BSS_CHANGED_ASSOC) {
1596                 wiphy_debug(hw->wiphy, "  ASSOC: assoc=%d aid=%d\n",
1597                             info->assoc, info->aid);
1598                 vp->assoc = info->assoc;
1599                 vp->aid = info->aid;
1600         }
1601
1602         if (changed & BSS_CHANGED_BEACON_ENABLED) {
1603                 wiphy_debug(hw->wiphy, "  BCN EN: %d (BI=%u)\n",
1604                             info->enable_beacon, info->beacon_int);
1605                 vp->bcn_en = info->enable_beacon;
1606                 if (data->started &&
1607                     !hrtimer_is_queued(&data->beacon_timer.timer) &&
1608                     info->enable_beacon) {
1609                         u64 tsf, until_tbtt;
1610                         u32 bcn_int;
1611                         data->beacon_int = info->beacon_int * 1024;
1612                         tsf = mac80211_hwsim_get_tsf(hw, vif);
1613                         bcn_int = data->beacon_int;
1614                         until_tbtt = bcn_int - do_div(tsf, bcn_int);
1615                         tasklet_hrtimer_start(&data->beacon_timer,
1616                                               ns_to_ktime(until_tbtt * 1000),
1617                                               HRTIMER_MODE_REL);
1618                 } else if (!info->enable_beacon) {
1619                         unsigned int count = 0;
1620                         ieee80211_iterate_active_interfaces_atomic(
1621                                 data->hw, IEEE80211_IFACE_ITER_NORMAL,
1622                                 mac80211_hwsim_bcn_en_iter, &count);
1623                         wiphy_debug(hw->wiphy, "  beaconing vifs remaining: %u",
1624                                     count);
1625                         if (count == 0) {
1626                                 tasklet_hrtimer_cancel(&data->beacon_timer);
1627                                 data->beacon_int = 0;
1628                         }
1629                 }
1630         }
1631
1632         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1633                 wiphy_debug(hw->wiphy, "  ERP_CTS_PROT: %d\n",
1634                             info->use_cts_prot);
1635         }
1636
1637         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1638                 wiphy_debug(hw->wiphy, "  ERP_PREAMBLE: %d\n",
1639                             info->use_short_preamble);
1640         }
1641
1642         if (changed & BSS_CHANGED_ERP_SLOT) {
1643                 wiphy_debug(hw->wiphy, "  ERP_SLOT: %d\n", info->use_short_slot);
1644         }
1645
1646         if (changed & BSS_CHANGED_HT) {
1647                 wiphy_debug(hw->wiphy, "  HT: op_mode=0x%x\n",
1648                             info->ht_operation_mode);
1649         }
1650
1651         if (changed & BSS_CHANGED_BASIC_RATES) {
1652                 wiphy_debug(hw->wiphy, "  BASIC_RATES: 0x%llx\n",
1653                             (unsigned long long) info->basic_rates);
1654         }
1655
1656         if (changed & BSS_CHANGED_TXPOWER)
1657                 wiphy_debug(hw->wiphy, "  TX Power: %d dBm\n", info->txpower);
1658 }
1659
1660 static int mac80211_hwsim_sta_add(struct ieee80211_hw *hw,
1661                                   struct ieee80211_vif *vif,
1662                                   struct ieee80211_sta *sta)
1663 {
1664         hwsim_check_magic(vif);
1665         hwsim_set_sta_magic(sta);
1666
1667         return 0;
1668 }
1669
1670 static int mac80211_hwsim_sta_remove(struct ieee80211_hw *hw,
1671                                      struct ieee80211_vif *vif,
1672                                      struct ieee80211_sta *sta)
1673 {
1674         hwsim_check_magic(vif);
1675         hwsim_clear_sta_magic(sta);
1676
1677         return 0;
1678 }
1679
1680 static void mac80211_hwsim_sta_notify(struct ieee80211_hw *hw,
1681                                       struct ieee80211_vif *vif,
1682                                       enum sta_notify_cmd cmd,
1683                                       struct ieee80211_sta *sta)
1684 {
1685         hwsim_check_magic(vif);
1686
1687         switch (cmd) {
1688         case STA_NOTIFY_SLEEP:
1689         case STA_NOTIFY_AWAKE:
1690                 /* TODO: make good use of these flags */
1691                 break;
1692         default:
1693                 WARN(1, "Invalid sta notify: %d\n", cmd);
1694                 break;
1695         }
1696 }
1697
1698 static int mac80211_hwsim_set_tim(struct ieee80211_hw *hw,
1699                                   struct ieee80211_sta *sta,
1700                                   bool set)
1701 {
1702         hwsim_check_sta_magic(sta);
1703         return 0;
1704 }
1705
1706 static int mac80211_hwsim_conf_tx(
1707         struct ieee80211_hw *hw,
1708         struct ieee80211_vif *vif, u16 queue,
1709         const struct ieee80211_tx_queue_params *params)
1710 {
1711         wiphy_debug(hw->wiphy,
1712                     "%s (queue=%d txop=%d cw_min=%d cw_max=%d aifs=%d)\n",
1713                     __func__, queue,
1714                     params->txop, params->cw_min,
1715                     params->cw_max, params->aifs);
1716         return 0;
1717 }
1718
1719 static int mac80211_hwsim_get_survey(
1720         struct ieee80211_hw *hw, int idx,
1721         struct survey_info *survey)
1722 {
1723         struct ieee80211_conf *conf = &hw->conf;
1724
1725         wiphy_debug(hw->wiphy, "%s (idx=%d)\n", __func__, idx);
1726
1727         if (idx != 0)
1728                 return -ENOENT;
1729
1730         /* Current channel */
1731         survey->channel = conf->chandef.chan;
1732
1733         /*
1734          * Magically conjured noise level --- this is only ok for simulated hardware.
1735          *
1736          * A real driver which cannot determine the real channel noise MUST NOT
1737          * report any noise, especially not a magically conjured one :-)
1738          */
1739         survey->filled = SURVEY_INFO_NOISE_DBM;
1740         survey->noise = -92;
1741
1742         return 0;
1743 }
1744
1745 #ifdef CONFIG_NL80211_TESTMODE
1746 /*
1747  * This section contains example code for using netlink
1748  * attributes with the testmode command in nl80211.
1749  */
1750
1751 /* These enums need to be kept in sync with userspace */
1752 enum hwsim_testmode_attr {
1753         __HWSIM_TM_ATTR_INVALID = 0,
1754         HWSIM_TM_ATTR_CMD       = 1,
1755         HWSIM_TM_ATTR_PS        = 2,
1756
1757         /* keep last */
1758         __HWSIM_TM_ATTR_AFTER_LAST,
1759         HWSIM_TM_ATTR_MAX       = __HWSIM_TM_ATTR_AFTER_LAST - 1
1760 };
1761
1762 enum hwsim_testmode_cmd {
1763         HWSIM_TM_CMD_SET_PS             = 0,
1764         HWSIM_TM_CMD_GET_PS             = 1,
1765         HWSIM_TM_CMD_STOP_QUEUES        = 2,
1766         HWSIM_TM_CMD_WAKE_QUEUES        = 3,
1767 };
1768
1769 static const struct nla_policy hwsim_testmode_policy[HWSIM_TM_ATTR_MAX + 1] = {
1770         [HWSIM_TM_ATTR_CMD] = { .type = NLA_U32 },
1771         [HWSIM_TM_ATTR_PS] = { .type = NLA_U32 },
1772 };
1773
1774 static int mac80211_hwsim_testmode_cmd(struct ieee80211_hw *hw,
1775                                        struct ieee80211_vif *vif,
1776                                        void *data, int len)
1777 {
1778         struct mac80211_hwsim_data *hwsim = hw->priv;
1779         struct nlattr *tb[HWSIM_TM_ATTR_MAX + 1];
1780         struct sk_buff *skb;
1781         int err, ps;
1782
1783         err = nla_parse(tb, HWSIM_TM_ATTR_MAX, data, len,
1784                         hwsim_testmode_policy);
1785         if (err)
1786                 return err;
1787
1788         if (!tb[HWSIM_TM_ATTR_CMD])
1789                 return -EINVAL;
1790
1791         switch (nla_get_u32(tb[HWSIM_TM_ATTR_CMD])) {
1792         case HWSIM_TM_CMD_SET_PS:
1793                 if (!tb[HWSIM_TM_ATTR_PS])
1794                         return -EINVAL;
1795                 ps = nla_get_u32(tb[HWSIM_TM_ATTR_PS]);
1796                 return hwsim_fops_ps_write(hwsim, ps);
1797         case HWSIM_TM_CMD_GET_PS:
1798                 skb = cfg80211_testmode_alloc_reply_skb(hw->wiphy,
1799                                                 nla_total_size(sizeof(u32)));
1800                 if (!skb)
1801                         return -ENOMEM;
1802                 if (nla_put_u32(skb, HWSIM_TM_ATTR_PS, hwsim->ps))
1803                         goto nla_put_failure;
1804                 return cfg80211_testmode_reply(skb);
1805         case HWSIM_TM_CMD_STOP_QUEUES:
1806                 ieee80211_stop_queues(hw);
1807                 return 0;
1808         case HWSIM_TM_CMD_WAKE_QUEUES:
1809                 ieee80211_wake_queues(hw);
1810                 return 0;
1811         default:
1812                 return -EOPNOTSUPP;
1813         }
1814
1815  nla_put_failure:
1816         kfree_skb(skb);
1817         return -ENOBUFS;
1818 }
1819 #endif
1820
1821 static int mac80211_hwsim_ampdu_action(struct ieee80211_hw *hw,
1822                                        struct ieee80211_vif *vif,
1823                                        enum ieee80211_ampdu_mlme_action action,
1824                                        struct ieee80211_sta *sta, u16 tid, u16 *ssn,
1825                                        u8 buf_size, bool amsdu)
1826 {
1827         switch (action) {
1828         case IEEE80211_AMPDU_TX_START:
1829                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1830                 break;
1831         case IEEE80211_AMPDU_TX_STOP_CONT:
1832         case IEEE80211_AMPDU_TX_STOP_FLUSH:
1833         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
1834                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1835                 break;
1836         case IEEE80211_AMPDU_TX_OPERATIONAL:
1837                 break;
1838         case IEEE80211_AMPDU_RX_START:
1839         case IEEE80211_AMPDU_RX_STOP:
1840                 break;
1841         default:
1842                 return -EOPNOTSUPP;
1843         }
1844
1845         return 0;
1846 }
1847
1848 static void mac80211_hwsim_flush(struct ieee80211_hw *hw,
1849                                  struct ieee80211_vif *vif,
1850                                  u32 queues, bool drop)
1851 {
1852         /* Not implemented, queues only on kernel side */
1853 }
1854
1855 static void hw_scan_work(struct work_struct *work)
1856 {
1857         struct mac80211_hwsim_data *hwsim =
1858                 container_of(work, struct mac80211_hwsim_data, hw_scan.work);
1859         struct cfg80211_scan_request *req = hwsim->hw_scan_request;
1860         int dwell, i;
1861
1862         mutex_lock(&hwsim->mutex);
1863         if (hwsim->scan_chan_idx >= req->n_channels) {
1864                 wiphy_debug(hwsim->hw->wiphy, "hw scan complete\n");
1865                 ieee80211_scan_completed(hwsim->hw, false);
1866                 hwsim->hw_scan_request = NULL;
1867                 hwsim->hw_scan_vif = NULL;
1868                 hwsim->tmp_chan = NULL;
1869                 mutex_unlock(&hwsim->mutex);
1870                 return;
1871         }
1872
1873         wiphy_debug(hwsim->hw->wiphy, "hw scan %d MHz\n",
1874                     req->channels[hwsim->scan_chan_idx]->center_freq);
1875
1876         hwsim->tmp_chan = req->channels[hwsim->scan_chan_idx];
1877         if (hwsim->tmp_chan->flags & (IEEE80211_CHAN_NO_IR |
1878                                       IEEE80211_CHAN_RADAR) ||
1879             !req->n_ssids) {
1880                 dwell = 120;
1881         } else {
1882                 dwell = 30;
1883                 /* send probes */
1884                 for (i = 0; i < req->n_ssids; i++) {
1885                         struct sk_buff *probe;
1886
1887                         probe = ieee80211_probereq_get(hwsim->hw,
1888                                                        hwsim->scan_addr,
1889                                                        req->ssids[i].ssid,
1890                                                        req->ssids[i].ssid_len,
1891                                                        req->ie_len);
1892                         if (!probe)
1893                                 continue;
1894
1895                         if (req->ie_len)
1896                                 memcpy(skb_put(probe, req->ie_len), req->ie,
1897                                        req->ie_len);
1898
1899                         local_bh_disable();
1900                         mac80211_hwsim_tx_frame(hwsim->hw, probe,
1901                                                 hwsim->tmp_chan);
1902                         local_bh_enable();
1903                 }
1904         }
1905         ieee80211_queue_delayed_work(hwsim->hw, &hwsim->hw_scan,
1906                                      msecs_to_jiffies(dwell));
1907         hwsim->scan_chan_idx++;
1908         mutex_unlock(&hwsim->mutex);
1909 }
1910
1911 static int mac80211_hwsim_hw_scan(struct ieee80211_hw *hw,
1912                                   struct ieee80211_vif *vif,
1913                                   struct ieee80211_scan_request *hw_req)
1914 {
1915         struct mac80211_hwsim_data *hwsim = hw->priv;
1916         struct cfg80211_scan_request *req = &hw_req->req;
1917
1918         mutex_lock(&hwsim->mutex);
1919         if (WARN_ON(hwsim->tmp_chan || hwsim->hw_scan_request)) {
1920                 mutex_unlock(&hwsim->mutex);
1921                 return -EBUSY;
1922         }
1923         hwsim->hw_scan_request = req;
1924         hwsim->hw_scan_vif = vif;
1925         hwsim->scan_chan_idx = 0;
1926         if (req->flags & NL80211_SCAN_FLAG_RANDOM_ADDR)
1927                 get_random_mask_addr(hwsim->scan_addr,
1928                                      hw_req->req.mac_addr,
1929                                      hw_req->req.mac_addr_mask);
1930         else
1931                 memcpy(hwsim->scan_addr, vif->addr, ETH_ALEN);
1932         mutex_unlock(&hwsim->mutex);
1933
1934         wiphy_debug(hw->wiphy, "hwsim hw_scan request\n");
1935
1936         ieee80211_queue_delayed_work(hwsim->hw, &hwsim->hw_scan, 0);
1937
1938         return 0;
1939 }
1940
1941 static void mac80211_hwsim_cancel_hw_scan(struct ieee80211_hw *hw,
1942                                           struct ieee80211_vif *vif)
1943 {
1944         struct mac80211_hwsim_data *hwsim = hw->priv;
1945
1946         wiphy_debug(hw->wiphy, "hwsim cancel_hw_scan\n");
1947
1948         cancel_delayed_work_sync(&hwsim->hw_scan);
1949
1950         mutex_lock(&hwsim->mutex);
1951         ieee80211_scan_completed(hwsim->hw, true);
1952         hwsim->tmp_chan = NULL;
1953         hwsim->hw_scan_request = NULL;
1954         hwsim->hw_scan_vif = NULL;
1955         mutex_unlock(&hwsim->mutex);
1956 }
1957
1958 static void mac80211_hwsim_sw_scan(struct ieee80211_hw *hw,
1959                                    struct ieee80211_vif *vif,
1960                                    const u8 *mac_addr)
1961 {
1962         struct mac80211_hwsim_data *hwsim = hw->priv;
1963
1964         mutex_lock(&hwsim->mutex);
1965
1966         if (hwsim->scanning) {
1967                 printk(KERN_DEBUG "two hwsim sw_scans detected!\n");
1968                 goto out;
1969         }
1970
1971         printk(KERN_DEBUG "hwsim sw_scan request, prepping stuff\n");
1972
1973         memcpy(hwsim->scan_addr, mac_addr, ETH_ALEN);
1974         hwsim->scanning = true;
1975
1976 out:
1977         mutex_unlock(&hwsim->mutex);
1978 }
1979
1980 static void mac80211_hwsim_sw_scan_complete(struct ieee80211_hw *hw,
1981                                             struct ieee80211_vif *vif)
1982 {
1983         struct mac80211_hwsim_data *hwsim = hw->priv;
1984
1985         mutex_lock(&hwsim->mutex);
1986
1987         printk(KERN_DEBUG "hwsim sw_scan_complete\n");
1988         hwsim->scanning = false;
1989         eth_zero_addr(hwsim->scan_addr);
1990
1991         mutex_unlock(&hwsim->mutex);
1992 }
1993
1994 static void hw_roc_start(struct work_struct *work)
1995 {
1996         struct mac80211_hwsim_data *hwsim =
1997                 container_of(work, struct mac80211_hwsim_data, roc_start.work);
1998
1999         mutex_lock(&hwsim->mutex);
2000
2001         wiphy_debug(hwsim->hw->wiphy, "hwsim ROC begins\n");
2002         hwsim->tmp_chan = hwsim->roc_chan;
2003         ieee80211_ready_on_channel(hwsim->hw);
2004
2005         ieee80211_queue_delayed_work(hwsim->hw, &hwsim->roc_done,
2006                                      msecs_to_jiffies(hwsim->roc_duration));
2007
2008         mutex_unlock(&hwsim->mutex);
2009 }
2010
2011 static void hw_roc_done(struct work_struct *work)
2012 {
2013         struct mac80211_hwsim_data *hwsim =
2014                 container_of(work, struct mac80211_hwsim_data, roc_done.work);
2015
2016         mutex_lock(&hwsim->mutex);
2017         ieee80211_remain_on_channel_expired(hwsim->hw);
2018         hwsim->tmp_chan = NULL;
2019         mutex_unlock(&hwsim->mutex);
2020
2021         wiphy_debug(hwsim->hw->wiphy, "hwsim ROC expired\n");
2022 }
2023
2024 static int mac80211_hwsim_roc(struct ieee80211_hw *hw,
2025                               struct ieee80211_vif *vif,
2026                               struct ieee80211_channel *chan,
2027                               int duration,
2028                               enum ieee80211_roc_type type)
2029 {
2030         struct mac80211_hwsim_data *hwsim = hw->priv;
2031
2032         mutex_lock(&hwsim->mutex);
2033         if (WARN_ON(hwsim->tmp_chan || hwsim->hw_scan_request)) {
2034                 mutex_unlock(&hwsim->mutex);
2035                 return -EBUSY;
2036         }
2037
2038         hwsim->roc_chan = chan;
2039         hwsim->roc_duration = duration;
2040         mutex_unlock(&hwsim->mutex);
2041
2042         wiphy_debug(hw->wiphy, "hwsim ROC (%d MHz, %d ms)\n",
2043                     chan->center_freq, duration);
2044         ieee80211_queue_delayed_work(hw, &hwsim->roc_start, HZ/50);
2045
2046         return 0;
2047 }
2048
2049 static int mac80211_hwsim_croc(struct ieee80211_hw *hw)
2050 {
2051         struct mac80211_hwsim_data *hwsim = hw->priv;
2052
2053         cancel_delayed_work_sync(&hwsim->roc_start);
2054         cancel_delayed_work_sync(&hwsim->roc_done);
2055
2056         mutex_lock(&hwsim->mutex);
2057         hwsim->tmp_chan = NULL;
2058         mutex_unlock(&hwsim->mutex);
2059
2060         wiphy_debug(hw->wiphy, "hwsim ROC canceled\n");
2061
2062         return 0;
2063 }
2064
2065 static int mac80211_hwsim_add_chanctx(struct ieee80211_hw *hw,
2066                                       struct ieee80211_chanctx_conf *ctx)
2067 {
2068         hwsim_set_chanctx_magic(ctx);
2069         wiphy_debug(hw->wiphy,
2070                     "add channel context control: %d MHz/width: %d/cfreqs:%d/%d MHz\n",
2071                     ctx->def.chan->center_freq, ctx->def.width,
2072                     ctx->def.center_freq1, ctx->def.center_freq2);
2073         return 0;
2074 }
2075
2076 static void mac80211_hwsim_remove_chanctx(struct ieee80211_hw *hw,
2077                                           struct ieee80211_chanctx_conf *ctx)
2078 {
2079         wiphy_debug(hw->wiphy,
2080                     "remove channel context control: %d MHz/width: %d/cfreqs:%d/%d MHz\n",
2081                     ctx->def.chan->center_freq, ctx->def.width,
2082                     ctx->def.center_freq1, ctx->def.center_freq2);
2083         hwsim_check_chanctx_magic(ctx);
2084         hwsim_clear_chanctx_magic(ctx);
2085 }
2086
2087 static void mac80211_hwsim_change_chanctx(struct ieee80211_hw *hw,
2088                                           struct ieee80211_chanctx_conf *ctx,
2089                                           u32 changed)
2090 {
2091         hwsim_check_chanctx_magic(ctx);
2092         wiphy_debug(hw->wiphy,
2093                     "change channel context control: %d MHz/width: %d/cfreqs:%d/%d MHz\n",
2094                     ctx->def.chan->center_freq, ctx->def.width,
2095                     ctx->def.center_freq1, ctx->def.center_freq2);
2096 }
2097
2098 static int mac80211_hwsim_assign_vif_chanctx(struct ieee80211_hw *hw,
2099                                              struct ieee80211_vif *vif,
2100                                              struct ieee80211_chanctx_conf *ctx)
2101 {
2102         hwsim_check_magic(vif);
2103         hwsim_check_chanctx_magic(ctx);
2104
2105         return 0;
2106 }
2107
2108 static void mac80211_hwsim_unassign_vif_chanctx(struct ieee80211_hw *hw,
2109                                                 struct ieee80211_vif *vif,
2110                                                 struct ieee80211_chanctx_conf *ctx)
2111 {
2112         hwsim_check_magic(vif);
2113         hwsim_check_chanctx_magic(ctx);
2114 }
2115
2116 static const char mac80211_hwsim_gstrings_stats[][ETH_GSTRING_LEN] = {
2117         "tx_pkts_nic",
2118         "tx_bytes_nic",
2119         "rx_pkts_nic",
2120         "rx_bytes_nic",
2121         "d_tx_dropped",
2122         "d_tx_failed",
2123         "d_ps_mode",
2124         "d_group",
2125         "d_tx_power",
2126 };
2127
2128 #define MAC80211_HWSIM_SSTATS_LEN ARRAY_SIZE(mac80211_hwsim_gstrings_stats)
2129
2130 static void mac80211_hwsim_get_et_strings(struct ieee80211_hw *hw,
2131                                           struct ieee80211_vif *vif,
2132                                           u32 sset, u8 *data)
2133 {
2134         if (sset == ETH_SS_STATS)
2135                 memcpy(data, *mac80211_hwsim_gstrings_stats,
2136                        sizeof(mac80211_hwsim_gstrings_stats));
2137 }
2138
2139 static int mac80211_hwsim_get_et_sset_count(struct ieee80211_hw *hw,
2140                                             struct ieee80211_vif *vif, int sset)
2141 {
2142         if (sset == ETH_SS_STATS)
2143                 return MAC80211_HWSIM_SSTATS_LEN;
2144         return 0;
2145 }
2146
2147 static void mac80211_hwsim_get_et_stats(struct ieee80211_hw *hw,
2148                                         struct ieee80211_vif *vif,
2149                                         struct ethtool_stats *stats, u64 *data)
2150 {
2151         struct mac80211_hwsim_data *ar = hw->priv;
2152         int i = 0;
2153
2154         data[i++] = ar->tx_pkts;
2155         data[i++] = ar->tx_bytes;
2156         data[i++] = ar->rx_pkts;
2157         data[i++] = ar->rx_bytes;
2158         data[i++] = ar->tx_dropped;
2159         data[i++] = ar->tx_failed;
2160         data[i++] = ar->ps;
2161         data[i++] = ar->group;
2162         data[i++] = ar->power_level;
2163
2164         WARN_ON(i != MAC80211_HWSIM_SSTATS_LEN);
2165 }
2166
2167 static const struct ieee80211_ops mac80211_hwsim_ops = {
2168         .tx = mac80211_hwsim_tx,
2169         .start = mac80211_hwsim_start,
2170         .stop = mac80211_hwsim_stop,
2171         .add_interface = mac80211_hwsim_add_interface,
2172         .change_interface = mac80211_hwsim_change_interface,
2173         .remove_interface = mac80211_hwsim_remove_interface,
2174         .config = mac80211_hwsim_config,
2175         .configure_filter = mac80211_hwsim_configure_filter,
2176         .bss_info_changed = mac80211_hwsim_bss_info_changed,
2177         .sta_add = mac80211_hwsim_sta_add,
2178         .sta_remove = mac80211_hwsim_sta_remove,
2179         .sta_notify = mac80211_hwsim_sta_notify,
2180         .set_tim = mac80211_hwsim_set_tim,
2181         .conf_tx = mac80211_hwsim_conf_tx,
2182         .get_survey = mac80211_hwsim_get_survey,
2183         CFG80211_TESTMODE_CMD(mac80211_hwsim_testmode_cmd)
2184         .ampdu_action = mac80211_hwsim_ampdu_action,
2185         .sw_scan_start = mac80211_hwsim_sw_scan,
2186         .sw_scan_complete = mac80211_hwsim_sw_scan_complete,
2187         .flush = mac80211_hwsim_flush,
2188         .get_tsf = mac80211_hwsim_get_tsf,
2189         .set_tsf = mac80211_hwsim_set_tsf,
2190         .get_et_sset_count = mac80211_hwsim_get_et_sset_count,
2191         .get_et_stats = mac80211_hwsim_get_et_stats,
2192         .get_et_strings = mac80211_hwsim_get_et_strings,
2193 };
2194
2195 static struct ieee80211_ops mac80211_hwsim_mchan_ops;
2196
2197 struct hwsim_new_radio_params {
2198         unsigned int channels;
2199         const char *reg_alpha2;
2200         const struct ieee80211_regdomain *regd;
2201         bool reg_strict;
2202         bool p2p_device;
2203         bool use_chanctx;
2204         bool destroy_on_close;
2205         const char *hwname;
2206         bool no_vif;
2207 };
2208
2209 static void hwsim_mcast_config_msg(struct sk_buff *mcast_skb,
2210                                    struct genl_info *info)
2211 {
2212         if (info)
2213                 genl_notify(&hwsim_genl_family, mcast_skb, info,
2214                             HWSIM_MCGRP_CONFIG, GFP_KERNEL);
2215         else
2216                 genlmsg_multicast(&hwsim_genl_family, mcast_skb, 0,
2217                                   HWSIM_MCGRP_CONFIG, GFP_KERNEL);
2218 }
2219
2220 static int append_radio_msg(struct sk_buff *skb, int id,
2221                             struct hwsim_new_radio_params *param)
2222 {
2223         int ret;
2224
2225         ret = nla_put_u32(skb, HWSIM_ATTR_RADIO_ID, id);
2226         if (ret < 0)
2227                 return ret;
2228
2229         if (param->channels) {
2230                 ret = nla_put_u32(skb, HWSIM_ATTR_CHANNELS, param->channels);
2231                 if (ret < 0)
2232                         return ret;
2233         }
2234
2235         if (param->reg_alpha2) {
2236                 ret = nla_put(skb, HWSIM_ATTR_REG_HINT_ALPHA2, 2,
2237                               param->reg_alpha2);
2238                 if (ret < 0)
2239                         return ret;
2240         }
2241
2242         if (param->regd) {
2243                 int i;
2244
2245                 for (i = 0; i < ARRAY_SIZE(hwsim_world_regdom_custom); i++) {
2246                         if (hwsim_world_regdom_custom[i] != param->regd)
2247                                 continue;
2248
2249                         ret = nla_put_u32(skb, HWSIM_ATTR_REG_CUSTOM_REG, i);
2250                         if (ret < 0)
2251                                 return ret;
2252                         break;
2253                 }
2254         }
2255
2256         if (param->reg_strict) {
2257                 ret = nla_put_flag(skb, HWSIM_ATTR_REG_STRICT_REG);
2258                 if (ret < 0)
2259                         return ret;
2260         }
2261
2262         if (param->p2p_device) {
2263                 ret = nla_put_flag(skb, HWSIM_ATTR_SUPPORT_P2P_DEVICE);
2264                 if (ret < 0)
2265                         return ret;
2266         }
2267
2268         if (param->use_chanctx) {
2269                 ret = nla_put_flag(skb, HWSIM_ATTR_USE_CHANCTX);
2270                 if (ret < 0)
2271                         return ret;
2272         }
2273
2274         if (param->hwname) {
2275                 ret = nla_put(skb, HWSIM_ATTR_RADIO_NAME,
2276                               strlen(param->hwname), param->hwname);
2277                 if (ret < 0)
2278                         return ret;
2279         }
2280
2281         return 0;
2282 }
2283
2284 static void hwsim_mcast_new_radio(int id, struct genl_info *info,
2285                                   struct hwsim_new_radio_params *param)
2286 {
2287         struct sk_buff *mcast_skb;
2288         void *data;
2289
2290         mcast_skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2291         if (!mcast_skb)
2292                 return;
2293
2294         data = genlmsg_put(mcast_skb, 0, 0, &hwsim_genl_family, 0,
2295                            HWSIM_CMD_NEW_RADIO);
2296         if (!data)
2297                 goto out_err;
2298
2299         if (append_radio_msg(mcast_skb, id, param) < 0)
2300                 goto out_err;
2301
2302         genlmsg_end(mcast_skb, data);
2303
2304         hwsim_mcast_config_msg(mcast_skb, info);
2305         return;
2306
2307 out_err:
2308         genlmsg_cancel(mcast_skb, data);
2309         nlmsg_free(mcast_skb);
2310 }
2311
2312 static int mac80211_hwsim_new_radio(struct genl_info *info,
2313                                     struct hwsim_new_radio_params *param)
2314 {
2315         int err;
2316         u8 addr[ETH_ALEN];
2317         struct mac80211_hwsim_data *data;
2318         struct ieee80211_hw *hw;
2319         enum ieee80211_band band;
2320         const struct ieee80211_ops *ops = &mac80211_hwsim_ops;
2321         int idx;
2322
2323         if (WARN_ON(param->channels > 1 && !param->use_chanctx))
2324                 return -EINVAL;
2325
2326         spin_lock_bh(&hwsim_radio_lock);
2327         idx = hwsim_radio_idx++;
2328         spin_unlock_bh(&hwsim_radio_lock);
2329
2330         if (param->use_chanctx)
2331                 ops = &mac80211_hwsim_mchan_ops;
2332         hw = ieee80211_alloc_hw_nm(sizeof(*data), ops, param->hwname);
2333         if (!hw) {
2334                 printk(KERN_DEBUG "mac80211_hwsim: ieee80211_alloc_hw failed\n");
2335                 err = -ENOMEM;
2336                 goto failed;
2337         }
2338         data = hw->priv;
2339         data->hw = hw;
2340
2341         data->dev = device_create(hwsim_class, NULL, 0, hw, "hwsim%d", idx);
2342         if (IS_ERR(data->dev)) {
2343                 printk(KERN_DEBUG
2344                        "mac80211_hwsim: device_create failed (%ld)\n",
2345                        PTR_ERR(data->dev));
2346                 err = -ENOMEM;
2347                 goto failed_drvdata;
2348         }
2349         data->dev->driver = &mac80211_hwsim_driver.driver;
2350         err = device_bind_driver(data->dev);
2351         if (err != 0) {
2352                 printk(KERN_DEBUG "mac80211_hwsim: device_bind_driver failed (%d)\n",
2353                        err);
2354                 goto failed_bind;
2355         }
2356
2357         skb_queue_head_init(&data->pending);
2358
2359         SET_IEEE80211_DEV(hw, data->dev);
2360         eth_zero_addr(addr);
2361         addr[0] = 0x02;
2362         addr[3] = idx >> 8;
2363         addr[4] = idx;
2364         memcpy(data->addresses[0].addr, addr, ETH_ALEN);
2365         memcpy(data->addresses[1].addr, addr, ETH_ALEN);
2366         data->addresses[1].addr[0] |= 0x40;
2367         hw->wiphy->n_addresses = 2;
2368         hw->wiphy->addresses = data->addresses;
2369
2370         data->channels = param->channels;
2371         data->use_chanctx = param->use_chanctx;
2372         data->idx = idx;
2373         data->destroy_on_close = param->destroy_on_close;
2374         if (info)
2375                 data->portid = info->snd_portid;
2376
2377         if (data->use_chanctx) {
2378                 hw->wiphy->max_scan_ssids = 255;
2379                 hw->wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
2380                 hw->wiphy->max_remain_on_channel_duration = 1000;
2381                 /* For channels > 1 DFS is not allowed */
2382                 hw->wiphy->n_iface_combinations = 1;
2383                 hw->wiphy->iface_combinations = &data->if_combination;
2384                 if (param->p2p_device)
2385                         data->if_combination = hwsim_if_comb_p2p_dev[0];
2386                 else
2387                         data->if_combination = hwsim_if_comb[0];
2388                 data->if_combination.num_different_channels = data->channels;
2389         } else if (param->p2p_device) {
2390                 hw->wiphy->iface_combinations = hwsim_if_comb_p2p_dev;
2391                 hw->wiphy->n_iface_combinations =
2392                         ARRAY_SIZE(hwsim_if_comb_p2p_dev);
2393         } else {
2394                 hw->wiphy->iface_combinations = hwsim_if_comb;
2395                 hw->wiphy->n_iface_combinations = ARRAY_SIZE(hwsim_if_comb);
2396         }
2397
2398         INIT_DELAYED_WORK(&data->roc_start, hw_roc_start);
2399         INIT_DELAYED_WORK(&data->roc_done, hw_roc_done);
2400         INIT_DELAYED_WORK(&data->hw_scan, hw_scan_work);
2401
2402         hw->queues = 5;
2403         hw->offchannel_tx_hw_queue = 4;
2404         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
2405                                      BIT(NL80211_IFTYPE_AP) |
2406                                      BIT(NL80211_IFTYPE_P2P_CLIENT) |
2407                                      BIT(NL80211_IFTYPE_P2P_GO) |
2408                                      BIT(NL80211_IFTYPE_ADHOC) |
2409                                      BIT(NL80211_IFTYPE_MESH_POINT);
2410
2411         if (param->p2p_device)
2412                 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_P2P_DEVICE);
2413
2414         ieee80211_hw_set(hw, SUPPORT_FAST_XMIT);
2415         ieee80211_hw_set(hw, CHANCTX_STA_CSA);
2416         ieee80211_hw_set(hw, SUPPORTS_HT_CCK_RATES);
2417         ieee80211_hw_set(hw, QUEUE_CONTROL);
2418         ieee80211_hw_set(hw, WANT_MONITOR_VIF);
2419         ieee80211_hw_set(hw, AMPDU_AGGREGATION);
2420         ieee80211_hw_set(hw, MFP_CAPABLE);
2421         ieee80211_hw_set(hw, SIGNAL_DBM);
2422         ieee80211_hw_set(hw, TDLS_WIDER_BW);
2423         if (rctbl)
2424                 ieee80211_hw_set(hw, SUPPORTS_RC_TABLE);
2425
2426         hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS |
2427                             WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL |
2428                             WIPHY_FLAG_AP_UAPSD |
2429                             WIPHY_FLAG_HAS_CHANNEL_SWITCH;
2430         hw->wiphy->features |= NL80211_FEATURE_ACTIVE_MONITOR |
2431                                NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE |
2432                                NL80211_FEATURE_STATIC_SMPS |
2433                                NL80211_FEATURE_DYNAMIC_SMPS |
2434                                NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR;
2435
2436         /* ask mac80211 to reserve space for magic */
2437         hw->vif_data_size = sizeof(struct hwsim_vif_priv);
2438         hw->sta_data_size = sizeof(struct hwsim_sta_priv);
2439         hw->chanctx_data_size = sizeof(struct hwsim_chanctx_priv);
2440
2441         memcpy(data->channels_2ghz, hwsim_channels_2ghz,
2442                 sizeof(hwsim_channels_2ghz));
2443         memcpy(data->channels_5ghz, hwsim_channels_5ghz,
2444                 sizeof(hwsim_channels_5ghz));
2445         memcpy(data->rates, hwsim_rates, sizeof(hwsim_rates));
2446
2447         for (band = IEEE80211_BAND_2GHZ; band < IEEE80211_NUM_BANDS; band++) {
2448                 struct ieee80211_supported_band *sband = &data->bands[band];
2449                 switch (band) {
2450                 case IEEE80211_BAND_2GHZ:
2451                         sband->channels = data->channels_2ghz;
2452                         sband->n_channels = ARRAY_SIZE(hwsim_channels_2ghz);
2453                         sband->bitrates = data->rates;
2454                         sband->n_bitrates = ARRAY_SIZE(hwsim_rates);
2455                         break;
2456                 case IEEE80211_BAND_5GHZ:
2457                         sband->channels = data->channels_5ghz;
2458                         sband->n_channels = ARRAY_SIZE(hwsim_channels_5ghz);
2459                         sband->bitrates = data->rates + 4;
2460                         sband->n_bitrates = ARRAY_SIZE(hwsim_rates) - 4;
2461
2462                         sband->vht_cap.vht_supported = true;
2463                         sband->vht_cap.cap =
2464                                 IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454 |
2465                                 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ |
2466                                 IEEE80211_VHT_CAP_RXLDPC |
2467                                 IEEE80211_VHT_CAP_SHORT_GI_80 |
2468                                 IEEE80211_VHT_CAP_SHORT_GI_160 |
2469                                 IEEE80211_VHT_CAP_TXSTBC |
2470                                 IEEE80211_VHT_CAP_RXSTBC_1 |
2471                                 IEEE80211_VHT_CAP_RXSTBC_2 |
2472                                 IEEE80211_VHT_CAP_RXSTBC_3 |
2473                                 IEEE80211_VHT_CAP_RXSTBC_4 |
2474                                 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
2475                         sband->vht_cap.vht_mcs.rx_mcs_map =
2476                                 cpu_to_le16(IEEE80211_VHT_MCS_SUPPORT_0_9 << 0 |
2477                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 2 |
2478                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 4 |
2479                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 6 |
2480                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 8 |
2481                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 10 |
2482                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 12 |
2483                                             IEEE80211_VHT_MCS_SUPPORT_0_9 << 14);
2484                         sband->vht_cap.vht_mcs.tx_mcs_map =
2485                                 sband->vht_cap.vht_mcs.rx_mcs_map;
2486                         break;
2487                 default:
2488                         continue;
2489                 }
2490
2491                 sband->ht_cap.ht_supported = true;
2492                 sband->ht_cap.cap = IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
2493                                     IEEE80211_HT_CAP_GRN_FLD |
2494                                     IEEE80211_HT_CAP_SGI_20 |
2495                                     IEEE80211_HT_CAP_SGI_40 |
2496                                     IEEE80211_HT_CAP_DSSSCCK40;
2497                 sband->ht_cap.ampdu_factor = 0x3;
2498                 sband->ht_cap.ampdu_density = 0x6;
2499                 memset(&sband->ht_cap.mcs, 0,
2500                        sizeof(sband->ht_cap.mcs));
2501                 sband->ht_cap.mcs.rx_mask[0] = 0xff;
2502                 sband->ht_cap.mcs.rx_mask[1] = 0xff;
2503                 sband->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
2504
2505                 hw->wiphy->bands[band] = sband;
2506         }
2507
2508         /* By default all radios belong to the first group */
2509         data->group = 1;
2510         mutex_init(&data->mutex);
2511
2512         /* Enable frame retransmissions for lossy channels */
2513         hw->max_rates = 4;
2514         hw->max_rate_tries = 11;
2515
2516         hw->wiphy->vendor_commands = mac80211_hwsim_vendor_commands;
2517         hw->wiphy->n_vendor_commands =
2518                 ARRAY_SIZE(mac80211_hwsim_vendor_commands);
2519         hw->wiphy->vendor_events = mac80211_hwsim_vendor_events;
2520         hw->wiphy->n_vendor_events = ARRAY_SIZE(mac80211_hwsim_vendor_events);
2521
2522         if (param->reg_strict)
2523                 hw->wiphy->regulatory_flags |= REGULATORY_STRICT_REG;
2524         if (param->regd) {
2525                 data->regd = param->regd;
2526                 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG;
2527                 wiphy_apply_custom_regulatory(hw->wiphy, param->regd);
2528                 /* give the regulatory workqueue a chance to run */
2529                 schedule_timeout_interruptible(1);
2530         }
2531
2532         if (param->no_vif)
2533                 ieee80211_hw_set(hw, NO_AUTO_VIF);
2534
2535         err = ieee80211_register_hw(hw);
2536         if (err < 0) {
2537                 printk(KERN_DEBUG "mac80211_hwsim: ieee80211_register_hw failed (%d)\n",
2538                        err);
2539                 goto failed_hw;
2540         }
2541
2542         wiphy_debug(hw->wiphy, "hwaddr %pM registered\n", hw->wiphy->perm_addr);
2543
2544         if (param->reg_alpha2) {
2545                 data->alpha2[0] = param->reg_alpha2[0];
2546                 data->alpha2[1] = param->reg_alpha2[1];
2547                 regulatory_hint(hw->wiphy, param->reg_alpha2);
2548         }
2549
2550         data->debugfs = debugfs_create_dir("hwsim", hw->wiphy->debugfsdir);
2551         debugfs_create_file("ps", 0666, data->debugfs, data, &hwsim_fops_ps);
2552         debugfs_create_file("group", 0666, data->debugfs, data,
2553                             &hwsim_fops_group);
2554         if (!data->use_chanctx)
2555                 debugfs_create_file("dfs_simulate_radar", 0222,
2556                                     data->debugfs,
2557                                     data, &hwsim_simulate_radar);
2558
2559         tasklet_hrtimer_init(&data->beacon_timer,
2560                              mac80211_hwsim_beacon,
2561                              CLOCK_MONOTONIC_RAW, HRTIMER_MODE_ABS);
2562
2563         spin_lock_bh(&hwsim_radio_lock);
2564         list_add_tail(&data->list, &hwsim_radios);
2565         spin_unlock_bh(&hwsim_radio_lock);
2566
2567         if (idx > 0)
2568                 hwsim_mcast_new_radio(idx, info, param);
2569
2570         return idx;
2571
2572 failed_hw:
2573         device_release_driver(data->dev);
2574 failed_bind:
2575         device_unregister(data->dev);
2576 failed_drvdata:
2577         ieee80211_free_hw(hw);
2578 failed:
2579         return err;
2580 }
2581
2582 static void hwsim_mcast_del_radio(int id, const char *hwname,
2583                                   struct genl_info *info)
2584 {
2585         struct sk_buff *skb;
2586         void *data;
2587         int ret;
2588
2589         skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
2590         if (!skb)
2591                 return;
2592
2593         data = genlmsg_put(skb, 0, 0, &hwsim_genl_family, 0,
2594                            HWSIM_CMD_DEL_RADIO);
2595         if (!data)
2596                 goto error;
2597
2598         ret = nla_put_u32(skb, HWSIM_ATTR_RADIO_ID, id);
2599         if (ret < 0)
2600                 goto error;
2601
2602         ret = nla_put(skb, HWSIM_ATTR_RADIO_NAME, strlen(hwname),
2603                       hwname);
2604         if (ret < 0)
2605                 goto error;
2606
2607         genlmsg_end(skb, data);
2608
2609         hwsim_mcast_config_msg(skb, info);
2610
2611         return;
2612
2613 error:
2614         nlmsg_free(skb);
2615 }
2616
2617 static void mac80211_hwsim_del_radio(struct mac80211_hwsim_data *data,
2618                                      const char *hwname,
2619                                      struct genl_info *info)
2620 {
2621         hwsim_mcast_del_radio(data->idx, hwname, info);
2622         debugfs_remove_recursive(data->debugfs);
2623         ieee80211_unregister_hw(data->hw);
2624         device_release_driver(data->dev);
2625         device_unregister(data->dev);
2626         ieee80211_free_hw(data->hw);
2627 }
2628
2629 static int mac80211_hwsim_get_radio(struct sk_buff *skb,
2630                                     struct mac80211_hwsim_data *data,
2631                                     u32 portid, u32 seq,
2632                                     struct netlink_callback *cb, int flags)
2633 {
2634         void *hdr;
2635         struct hwsim_new_radio_params param = { };
2636         int res = -EMSGSIZE;
2637
2638         hdr = genlmsg_put(skb, portid, seq, &hwsim_genl_family, flags,
2639                           HWSIM_CMD_GET_RADIO);
2640         if (!hdr)
2641                 return -EMSGSIZE;
2642
2643         if (cb)
2644                 genl_dump_check_consistent(cb, hdr, &hwsim_genl_family);
2645
2646         if (data->alpha2[0] && data->alpha2[1])
2647                 param.reg_alpha2 = data->alpha2;
2648
2649         param.reg_strict = !!(data->hw->wiphy->regulatory_flags &
2650                                         REGULATORY_STRICT_REG);
2651         param.p2p_device = !!(data->hw->wiphy->interface_modes &
2652                                         BIT(NL80211_IFTYPE_P2P_DEVICE));
2653         param.use_chanctx = data->use_chanctx;
2654         param.regd = data->regd;
2655         param.channels = data->channels;
2656         param.hwname = wiphy_name(data->hw->wiphy);
2657
2658         res = append_radio_msg(skb, data->idx, &param);
2659         if (res < 0)
2660                 goto out_err;
2661
2662         genlmsg_end(skb, hdr);
2663         return 0;
2664
2665 out_err:
2666         genlmsg_cancel(skb, hdr);
2667         return res;
2668 }
2669
2670 static void mac80211_hwsim_free(void)
2671 {
2672         struct mac80211_hwsim_data *data;
2673
2674         spin_lock_bh(&hwsim_radio_lock);
2675         while ((data = list_first_entry_or_null(&hwsim_radios,
2676                                                 struct mac80211_hwsim_data,
2677                                                 list))) {
2678                 list_del(&data->list);
2679                 spin_unlock_bh(&hwsim_radio_lock);
2680                 mac80211_hwsim_del_radio(data, wiphy_name(data->hw->wiphy),
2681                                          NULL);
2682                 spin_lock_bh(&hwsim_radio_lock);
2683         }
2684         spin_unlock_bh(&hwsim_radio_lock);
2685         class_destroy(hwsim_class);
2686 }
2687
2688 static const struct net_device_ops hwsim_netdev_ops = {
2689         .ndo_start_xmit         = hwsim_mon_xmit,
2690         .ndo_change_mtu         = eth_change_mtu,
2691         .ndo_set_mac_address    = eth_mac_addr,
2692         .ndo_validate_addr      = eth_validate_addr,
2693 };
2694
2695 static void hwsim_mon_setup(struct net_device *dev)
2696 {
2697         dev->netdev_ops = &hwsim_netdev_ops;
2698         dev->destructor = free_netdev;
2699         ether_setup(dev);
2700         dev->priv_flags |= IFF_NO_QUEUE;
2701         dev->type = ARPHRD_IEEE80211_RADIOTAP;
2702         eth_zero_addr(dev->dev_addr);
2703         dev->dev_addr[0] = 0x12;
2704 }
2705
2706 static struct mac80211_hwsim_data *get_hwsim_data_ref_from_addr(const u8 *addr)
2707 {
2708         struct mac80211_hwsim_data *data;
2709         bool _found = false;
2710
2711         spin_lock_bh(&hwsim_radio_lock);
2712         list_for_each_entry(data, &hwsim_radios, list) {
2713                 if (mac80211_hwsim_addr_match(data, addr)) {
2714                         _found = true;
2715                         break;
2716                 }
2717         }
2718         spin_unlock_bh(&hwsim_radio_lock);
2719
2720         if (!_found)
2721                 return NULL;
2722
2723         return data;
2724 }
2725
2726 static int hwsim_tx_info_frame_received_nl(struct sk_buff *skb_2,
2727                                            struct genl_info *info)
2728 {
2729
2730         struct ieee80211_hdr *hdr;
2731         struct mac80211_hwsim_data *data2;
2732         struct ieee80211_tx_info *txi;
2733         struct hwsim_tx_rate *tx_attempts;
2734         unsigned long ret_skb_ptr;
2735         struct sk_buff *skb, *tmp;
2736         const u8 *src;
2737         unsigned int hwsim_flags;
2738         int i;
2739         bool found = false;
2740
2741         if (info->snd_portid != wmediumd_portid)
2742                 return -EINVAL;
2743
2744         if (!info->attrs[HWSIM_ATTR_ADDR_TRANSMITTER] ||
2745             !info->attrs[HWSIM_ATTR_FLAGS] ||
2746             !info->attrs[HWSIM_ATTR_COOKIE] ||
2747             !info->attrs[HWSIM_ATTR_TX_INFO])
2748                 goto out;
2749
2750         src = (void *)nla_data(info->attrs[HWSIM_ATTR_ADDR_TRANSMITTER]);
2751         hwsim_flags = nla_get_u32(info->attrs[HWSIM_ATTR_FLAGS]);
2752         ret_skb_ptr = nla_get_u64(info->attrs[HWSIM_ATTR_COOKIE]);
2753
2754         data2 = get_hwsim_data_ref_from_addr(src);
2755         if (!data2)
2756                 goto out;
2757
2758         /* look for the skb matching the cookie passed back from user */
2759         skb_queue_walk_safe(&data2->pending, skb, tmp) {
2760                 if ((unsigned long)skb == ret_skb_ptr) {
2761                         skb_unlink(skb, &data2->pending);
2762                         found = true;
2763                         break;
2764                 }
2765         }
2766
2767         /* not found */
2768         if (!found)
2769                 goto out;
2770
2771         /* Tx info received because the frame was broadcasted on user space,
2772          so we get all the necessary info: tx attempts and skb control buff */
2773
2774         tx_attempts = (struct hwsim_tx_rate *)nla_data(
2775                        info->attrs[HWSIM_ATTR_TX_INFO]);
2776
2777         /* now send back TX status */
2778         txi = IEEE80211_SKB_CB(skb);
2779
2780         ieee80211_tx_info_clear_status(txi);
2781
2782         for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
2783                 txi->status.rates[i].idx = tx_attempts[i].idx;
2784                 txi->status.rates[i].count = tx_attempts[i].count;
2785                 /*txi->status.rates[i].flags = 0;*/
2786         }
2787
2788         txi->status.ack_signal = nla_get_u32(info->attrs[HWSIM_ATTR_SIGNAL]);
2789
2790         if (!(hwsim_flags & HWSIM_TX_CTL_NO_ACK) &&
2791            (hwsim_flags & HWSIM_TX_STAT_ACK)) {
2792                 if (skb->len >= 16) {
2793                         hdr = (struct ieee80211_hdr *) skb->data;
2794                         mac80211_hwsim_monitor_ack(data2->channel,
2795                                                    hdr->addr2);
2796                 }
2797                 txi->flags |= IEEE80211_TX_STAT_ACK;
2798         }
2799         ieee80211_tx_status_irqsafe(data2->hw, skb);
2800         return 0;
2801 out:
2802         return -EINVAL;
2803
2804 }
2805
2806 static int hwsim_cloned_frame_received_nl(struct sk_buff *skb_2,
2807                                           struct genl_info *info)
2808 {
2809         struct mac80211_hwsim_data *data2;
2810         struct ieee80211_rx_status rx_status;
2811         const u8 *dst;
2812         int frame_data_len;
2813         void *frame_data;
2814         struct sk_buff *skb = NULL;
2815
2816         if (info->snd_portid != wmediumd_portid)
2817                 return -EINVAL;
2818
2819         if (!info->attrs[HWSIM_ATTR_ADDR_RECEIVER] ||
2820             !info->attrs[HWSIM_ATTR_FRAME] ||
2821             !info->attrs[HWSIM_ATTR_RX_RATE] ||
2822             !info->attrs[HWSIM_ATTR_SIGNAL])
2823                 goto out;
2824
2825         dst = (void *)nla_data(info->attrs[HWSIM_ATTR_ADDR_RECEIVER]);
2826         frame_data_len = nla_len(info->attrs[HWSIM_ATTR_FRAME]);
2827         frame_data = (void *)nla_data(info->attrs[HWSIM_ATTR_FRAME]);
2828
2829         /* Allocate new skb here */
2830         skb = alloc_skb(frame_data_len, GFP_KERNEL);
2831         if (skb == NULL)
2832                 goto err;
2833
2834         if (frame_data_len > IEEE80211_MAX_DATA_LEN)
2835                 goto err;
2836
2837         /* Copy the data */
2838         memcpy(skb_put(skb, frame_data_len), frame_data, frame_data_len);
2839
2840         data2 = get_hwsim_data_ref_from_addr(dst);
2841         if (!data2)
2842                 goto out;
2843
2844         /* check if radio is configured properly */
2845
2846         if (data2->idle || !data2->started)
2847                 goto out;
2848
2849         /* A frame is received from user space */
2850         memset(&rx_status, 0, sizeof(rx_status));
2851         /* TODO: Check ATTR_FREQ if it exists, and maybe throw away off-channel
2852          * packets?
2853          */
2854         rx_status.freq = data2->channel->center_freq;
2855         rx_status.band = data2->channel->band;
2856         rx_status.rate_idx = nla_get_u32(info->attrs[HWSIM_ATTR_RX_RATE]);
2857         rx_status.signal = nla_get_u32(info->attrs[HWSIM_ATTR_SIGNAL]);
2858
2859         memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
2860         data2->rx_pkts++;
2861         data2->rx_bytes += skb->len;
2862         ieee80211_rx_irqsafe(data2->hw, skb);
2863
2864         return 0;
2865 err:
2866         printk(KERN_DEBUG "mac80211_hwsim: error occurred in %s\n", __func__);
2867 out:
2868         dev_kfree_skb(skb);
2869         return -EINVAL;
2870 }
2871
2872 static int hwsim_register_received_nl(struct sk_buff *skb_2,
2873                                       struct genl_info *info)
2874 {
2875         struct mac80211_hwsim_data *data;
2876         int chans = 1;
2877
2878         spin_lock_bh(&hwsim_radio_lock);
2879         list_for_each_entry(data, &hwsim_radios, list)
2880                 chans = max(chans, data->channels);
2881         spin_unlock_bh(&hwsim_radio_lock);
2882
2883         /* In the future we should revise the userspace API and allow it
2884          * to set a flag that it does support multi-channel, then we can
2885          * let this pass conditionally on the flag.
2886          * For current userspace, prohibit it since it won't work right.
2887          */
2888         if (chans > 1)
2889                 return -EOPNOTSUPP;
2890
2891         if (wmediumd_portid)
2892                 return -EBUSY;
2893
2894         wmediumd_portid = info->snd_portid;
2895
2896         printk(KERN_DEBUG "mac80211_hwsim: received a REGISTER, "
2897                "switching to wmediumd mode with pid %d\n", info->snd_portid);
2898
2899         return 0;
2900 }
2901
2902 static int hwsim_new_radio_nl(struct sk_buff *msg, struct genl_info *info)
2903 {
2904         struct hwsim_new_radio_params param = { 0 };
2905
2906         param.reg_strict = info->attrs[HWSIM_ATTR_REG_STRICT_REG];
2907         param.p2p_device = info->attrs[HWSIM_ATTR_SUPPORT_P2P_DEVICE];
2908         param.channels = channels;
2909         param.destroy_on_close =
2910                 info->attrs[HWSIM_ATTR_DESTROY_RADIO_ON_CLOSE];
2911
2912         if (info->attrs[HWSIM_ATTR_CHANNELS])
2913                 param.channels = nla_get_u32(info->attrs[HWSIM_ATTR_CHANNELS]);
2914
2915         if (info->attrs[HWSIM_ATTR_NO_VIF])
2916                 param.no_vif = true;
2917
2918         if (info->attrs[HWSIM_ATTR_RADIO_NAME])
2919                 param.hwname = nla_data(info->attrs[HWSIM_ATTR_RADIO_NAME]);
2920
2921         if (info->attrs[HWSIM_ATTR_USE_CHANCTX])
2922                 param.use_chanctx = true;
2923         else
2924                 param.use_chanctx = (param.channels > 1);
2925
2926         if (info->attrs[HWSIM_ATTR_REG_HINT_ALPHA2])
2927                 param.reg_alpha2 =
2928                         nla_data(info->attrs[HWSIM_ATTR_REG_HINT_ALPHA2]);
2929
2930         if (info->attrs[HWSIM_ATTR_REG_CUSTOM_REG]) {
2931                 u32 idx = nla_get_u32(info->attrs[HWSIM_ATTR_REG_CUSTOM_REG]);
2932
2933                 if (idx >= ARRAY_SIZE(hwsim_world_regdom_custom))
2934                         return -EINVAL;
2935                 param.regd = hwsim_world_regdom_custom[idx];
2936         }
2937
2938         return mac80211_hwsim_new_radio(info, &param);
2939 }
2940
2941 static int hwsim_del_radio_nl(struct sk_buff *msg, struct genl_info *info)
2942 {
2943         struct mac80211_hwsim_data *data;
2944         s64 idx = -1;
2945         const char *hwname = NULL;
2946
2947         if (info->attrs[HWSIM_ATTR_RADIO_ID])
2948                 idx = nla_get_u32(info->attrs[HWSIM_ATTR_RADIO_ID]);
2949         else if (info->attrs[HWSIM_ATTR_RADIO_NAME])
2950                 hwname = (void *)nla_data(info->attrs[HWSIM_ATTR_RADIO_NAME]);
2951         else
2952                 return -EINVAL;
2953
2954         spin_lock_bh(&hwsim_radio_lock);
2955         list_for_each_entry(data, &hwsim_radios, list) {
2956                 if (idx >= 0) {
2957                         if (data->idx != idx)
2958                                 continue;
2959                 } else {
2960                         if (strcmp(hwname, wiphy_name(data->hw->wiphy)))
2961                                 continue;
2962                 }
2963
2964                 list_del(&data->list);
2965                 spin_unlock_bh(&hwsim_radio_lock);
2966                 mac80211_hwsim_del_radio(data, wiphy_name(data->hw->wiphy),
2967                                          info);
2968                 return 0;
2969         }
2970         spin_unlock_bh(&hwsim_radio_lock);
2971
2972         return -ENODEV;
2973 }
2974
2975 static int hwsim_get_radio_nl(struct sk_buff *msg, struct genl_info *info)
2976 {
2977         struct mac80211_hwsim_data *data;
2978         struct sk_buff *skb;
2979         int idx, res = -ENODEV;
2980
2981         if (!info->attrs[HWSIM_ATTR_RADIO_ID])
2982                 return -EINVAL;
2983         idx = nla_get_u32(info->attrs[HWSIM_ATTR_RADIO_ID]);
2984
2985         spin_lock_bh(&hwsim_radio_lock);
2986         list_for_each_entry(data, &hwsim_radios, list) {
2987                 if (data->idx != idx)
2988                         continue;
2989
2990                 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2991                 if (!skb) {
2992                         res = -ENOMEM;
2993                         goto out_err;
2994                 }
2995
2996                 res = mac80211_hwsim_get_radio(skb, data, info->snd_portid,
2997                                                info->snd_seq, NULL, 0);
2998                 if (res < 0) {
2999                         nlmsg_free(skb);
3000                         goto out_err;
3001                 }
3002
3003                 genlmsg_reply(skb, info);
3004                 break;
3005         }
3006
3007 out_err:
3008         spin_unlock_bh(&hwsim_radio_lock);
3009
3010         return res;
3011 }
3012
3013 static int hwsim_dump_radio_nl(struct sk_buff *skb,
3014                                struct netlink_callback *cb)
3015 {
3016         int idx = cb->args[0];
3017         struct mac80211_hwsim_data *data = NULL;
3018         int res;
3019
3020         spin_lock_bh(&hwsim_radio_lock);
3021
3022         if (idx == hwsim_radio_idx)
3023                 goto done;
3024
3025         list_for_each_entry(data, &hwsim_radios, list) {
3026                 if (data->idx < idx)
3027                         continue;
3028
3029                 res = mac80211_hwsim_get_radio(skb, data,
3030                                                NETLINK_CB(cb->skb).portid,
3031                                                cb->nlh->nlmsg_seq, cb,
3032                                                NLM_F_MULTI);
3033                 if (res < 0)
3034                         break;
3035
3036                 idx = data->idx + 1;
3037         }
3038
3039         cb->args[0] = idx;
3040
3041 done:
3042         spin_unlock_bh(&hwsim_radio_lock);
3043         return skb->len;
3044 }
3045
3046 /* Generic Netlink operations array */
3047 static const struct genl_ops hwsim_ops[] = {
3048         {
3049                 .cmd = HWSIM_CMD_REGISTER,
3050                 .policy = hwsim_genl_policy,
3051                 .doit = hwsim_register_received_nl,
3052                 .flags = GENL_ADMIN_PERM,
3053         },
3054         {
3055                 .cmd = HWSIM_CMD_FRAME,
3056                 .policy = hwsim_genl_policy,
3057                 .doit = hwsim_cloned_frame_received_nl,
3058         },
3059         {
3060                 .cmd = HWSIM_CMD_TX_INFO_FRAME,
3061                 .policy = hwsim_genl_policy,
3062                 .doit = hwsim_tx_info_frame_received_nl,
3063         },
3064         {
3065                 .cmd = HWSIM_CMD_NEW_RADIO,
3066                 .policy = hwsim_genl_policy,
3067                 .doit = hwsim_new_radio_nl,
3068                 .flags = GENL_ADMIN_PERM,
3069         },
3070         {
3071                 .cmd = HWSIM_CMD_DEL_RADIO,
3072                 .policy = hwsim_genl_policy,
3073                 .doit = hwsim_del_radio_nl,
3074                 .flags = GENL_ADMIN_PERM,
3075         },
3076         {
3077                 .cmd = HWSIM_CMD_GET_RADIO,
3078                 .policy = hwsim_genl_policy,
3079                 .doit = hwsim_get_radio_nl,
3080                 .dumpit = hwsim_dump_radio_nl,
3081         },
3082 };
3083
3084 static void destroy_radio(struct work_struct *work)
3085 {
3086         struct mac80211_hwsim_data *data =
3087                 container_of(work, struct mac80211_hwsim_data, destroy_work);
3088
3089         mac80211_hwsim_del_radio(data, wiphy_name(data->hw->wiphy), NULL);
3090 }
3091
3092 static void remove_user_radios(u32 portid)
3093 {
3094         struct mac80211_hwsim_data *entry, *tmp;
3095
3096         spin_lock_bh(&hwsim_radio_lock);
3097         list_for_each_entry_safe(entry, tmp, &hwsim_radios, list) {
3098                 if (entry->destroy_on_close && entry->portid == portid) {
3099                         list_del(&entry->list);
3100                         INIT_WORK(&entry->destroy_work, destroy_radio);
3101                         schedule_work(&entry->destroy_work);
3102                 }
3103         }
3104         spin_unlock_bh(&hwsim_radio_lock);
3105 }
3106
3107 static int mac80211_hwsim_netlink_notify(struct notifier_block *nb,
3108                                          unsigned long state,
3109                                          void *_notify)
3110 {
3111         struct netlink_notify *notify = _notify;
3112
3113         if (state != NETLINK_URELEASE)
3114                 return NOTIFY_DONE;
3115
3116         remove_user_radios(notify->portid);
3117
3118         if (notify->portid == wmediumd_portid) {
3119                 printk(KERN_INFO "mac80211_hwsim: wmediumd released netlink"
3120                        " socket, switching to perfect channel medium\n");
3121                 wmediumd_portid = 0;
3122         }
3123         return NOTIFY_DONE;
3124
3125 }
3126
3127 static struct notifier_block hwsim_netlink_notifier = {
3128         .notifier_call = mac80211_hwsim_netlink_notify,
3129 };
3130
3131 static int hwsim_init_netlink(void)
3132 {
3133         int rc;
3134
3135         printk(KERN_INFO "mac80211_hwsim: initializing netlink\n");
3136
3137         rc = genl_register_family_with_ops_groups(&hwsim_genl_family,
3138                                                   hwsim_ops,
3139                                                   hwsim_mcgrps);
3140         if (rc)
3141                 goto failure;
3142
3143         rc = netlink_register_notifier(&hwsim_netlink_notifier);
3144         if (rc) {
3145                 genl_unregister_family(&hwsim_genl_family);
3146                 goto failure;
3147         }
3148
3149         return 0;
3150
3151 failure:
3152         printk(KERN_DEBUG "mac80211_hwsim: error occurred in %s\n", __func__);
3153         return -EINVAL;
3154 }
3155
3156 static void hwsim_exit_netlink(void)
3157 {
3158         /* unregister the notifier */
3159         netlink_unregister_notifier(&hwsim_netlink_notifier);
3160         /* unregister the family */
3161         genl_unregister_family(&hwsim_genl_family);
3162 }
3163
3164 static int __init init_mac80211_hwsim(void)
3165 {
3166         int i, err;
3167
3168         if (radios < 0 || radios > 100)
3169                 return -EINVAL;
3170
3171         if (channels < 1)
3172                 return -EINVAL;
3173
3174         mac80211_hwsim_mchan_ops = mac80211_hwsim_ops;
3175         mac80211_hwsim_mchan_ops.hw_scan = mac80211_hwsim_hw_scan;
3176         mac80211_hwsim_mchan_ops.cancel_hw_scan = mac80211_hwsim_cancel_hw_scan;
3177         mac80211_hwsim_mchan_ops.sw_scan_start = NULL;
3178         mac80211_hwsim_mchan_ops.sw_scan_complete = NULL;
3179         mac80211_hwsim_mchan_ops.remain_on_channel = mac80211_hwsim_roc;
3180         mac80211_hwsim_mchan_ops.cancel_remain_on_channel = mac80211_hwsim_croc;
3181         mac80211_hwsim_mchan_ops.add_chanctx = mac80211_hwsim_add_chanctx;
3182         mac80211_hwsim_mchan_ops.remove_chanctx = mac80211_hwsim_remove_chanctx;
3183         mac80211_hwsim_mchan_ops.change_chanctx = mac80211_hwsim_change_chanctx;
3184         mac80211_hwsim_mchan_ops.assign_vif_chanctx =
3185                 mac80211_hwsim_assign_vif_chanctx;
3186         mac80211_hwsim_mchan_ops.unassign_vif_chanctx =
3187                 mac80211_hwsim_unassign_vif_chanctx;
3188
3189         spin_lock_init(&hwsim_radio_lock);
3190         INIT_LIST_HEAD(&hwsim_radios);
3191
3192         err = platform_driver_register(&mac80211_hwsim_driver);
3193         if (err)
3194                 return err;
3195
3196         hwsim_class = class_create(THIS_MODULE, "mac80211_hwsim");
3197         if (IS_ERR(hwsim_class)) {
3198                 err = PTR_ERR(hwsim_class);
3199                 goto out_unregister_driver;
3200         }
3201
3202         err = hwsim_init_netlink();
3203         if (err < 0)
3204                 goto out_unregister_driver;
3205
3206         for (i = 0; i < radios; i++) {
3207                 struct hwsim_new_radio_params param = { 0 };
3208
3209                 param.channels = channels;
3210
3211                 switch (regtest) {
3212                 case HWSIM_REGTEST_DIFF_COUNTRY:
3213                         if (i < ARRAY_SIZE(hwsim_alpha2s))
3214                                 param.reg_alpha2 = hwsim_alpha2s[i];
3215                         break;
3216                 case HWSIM_REGTEST_DRIVER_REG_FOLLOW:
3217                         if (!i)
3218                                 param.reg_alpha2 = hwsim_alpha2s[0];
3219                         break;
3220                 case HWSIM_REGTEST_STRICT_ALL:
3221                         param.reg_strict = true;
3222                 case HWSIM_REGTEST_DRIVER_REG_ALL:
3223                         param.reg_alpha2 = hwsim_alpha2s[0];
3224                         break;
3225                 case HWSIM_REGTEST_WORLD_ROAM:
3226                         if (i == 0)
3227                                 param.regd = &hwsim_world_regdom_custom_01;
3228                         break;
3229                 case HWSIM_REGTEST_CUSTOM_WORLD:
3230                         param.regd = &hwsim_world_regdom_custom_01;
3231                         break;
3232                 case HWSIM_REGTEST_CUSTOM_WORLD_2:
3233                         if (i == 0)
3234                                 param.regd = &hwsim_world_regdom_custom_01;
3235                         else if (i == 1)
3236                                 param.regd = &hwsim_world_regdom_custom_02;
3237                         break;
3238                 case HWSIM_REGTEST_STRICT_FOLLOW:
3239                         if (i == 0) {
3240                                 param.reg_strict = true;
3241                                 param.reg_alpha2 = hwsim_alpha2s[0];
3242                         }
3243                         break;
3244                 case HWSIM_REGTEST_STRICT_AND_DRIVER_REG:
3245                         if (i == 0) {
3246                                 param.reg_strict = true;
3247                                 param.reg_alpha2 = hwsim_alpha2s[0];
3248                         } else if (i == 1) {
3249                                 param.reg_alpha2 = hwsim_alpha2s[1];
3250                         }
3251                         break;
3252                 case HWSIM_REGTEST_ALL:
3253                         switch (i) {
3254                         case 0:
3255                                 param.regd = &hwsim_world_regdom_custom_01;
3256                                 break;
3257                         case 1:
3258                                 param.regd = &hwsim_world_regdom_custom_02;
3259                                 break;
3260                         case 2:
3261                                 param.reg_alpha2 = hwsim_alpha2s[0];
3262                                 break;
3263                         case 3:
3264                                 param.reg_alpha2 = hwsim_alpha2s[1];
3265                                 break;
3266                         case 4:
3267                                 param.reg_strict = true;
3268                                 param.reg_alpha2 = hwsim_alpha2s[2];
3269                                 break;
3270                         }
3271                         break;
3272                 default:
3273                         break;
3274                 }
3275
3276                 param.p2p_device = support_p2p_device;
3277                 param.use_chanctx = channels > 1;
3278
3279                 err = mac80211_hwsim_new_radio(NULL, &param);
3280                 if (err < 0)
3281                         goto out_free_radios;
3282         }
3283
3284         hwsim_mon = alloc_netdev(0, "hwsim%d", NET_NAME_UNKNOWN,
3285                                  hwsim_mon_setup);
3286         if (hwsim_mon == NULL) {
3287                 err = -ENOMEM;
3288                 goto out_free_radios;
3289         }
3290
3291         rtnl_lock();
3292         err = dev_alloc_name(hwsim_mon, hwsim_mon->name);
3293         if (err < 0) {
3294                 rtnl_unlock();
3295                 goto out_free_radios;
3296         }
3297
3298         err = register_netdevice(hwsim_mon);
3299         if (err < 0) {
3300                 rtnl_unlock();
3301                 goto out_free_mon;
3302         }
3303         rtnl_unlock();
3304
3305         return 0;
3306
3307 out_free_mon:
3308         free_netdev(hwsim_mon);
3309 out_free_radios:
3310         mac80211_hwsim_free();
3311 out_unregister_driver:
3312         platform_driver_unregister(&mac80211_hwsim_driver);
3313         return err;
3314 }
3315 module_init(init_mac80211_hwsim);
3316
3317 static void __exit exit_mac80211_hwsim(void)
3318 {
3319         printk(KERN_DEBUG "mac80211_hwsim: unregister radios\n");
3320
3321         hwsim_exit_netlink();
3322
3323         mac80211_hwsim_free();
3324         unregister_netdev(hwsim_mon);
3325         platform_driver_unregister(&mac80211_hwsim_driver);
3326 }
3327 module_exit(exit_mac80211_hwsim);