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/debugfs.h>
  29 #include <linux/module.h>
  30 #include <linux/ktime.h>
  31 #include <net/genetlink.h>
  32 #include "mac80211_hwsim.h"
  33
  34 #define WARN_QUEUE 100
  35 #define MAX_QUEUE 200
  36
  37 MODULE_AUTHOR("Jouni Malinen");
  38 MODULE_DESCRIPTION("Software simulator of 802.11 radio(s) for mac80211");
  39 MODULE_LICENSE("GPL");
  40
  41 static u32 wmediumd_pid;
  42
  43 static int radios = 2;
  44 module_param(radios, int, 0444);
  45 MODULE_PARM_DESC(radios, "Number of simulated radios");
  46
  47 static bool fake_hw_scan;
  48 module_param(fake_hw_scan, bool, 0444);
  49 MODULE_PARM_DESC(fake_hw_scan, "Install fake (no-op) hw-scan handler");
  50
  51 /**
  52  * enum hwsim_regtest - the type of regulatory tests we offer
  53  *
  54  * These are the different values you can use for the regtest
  55  * module parameter. This is useful to help test world roaming
  56  * and the driver regulatory_hint() call and combinations of these.
  57  * If you want to do specific alpha2 regulatory domain tests simply
  58  * use the userspace regulatory request as that will be respected as
  59  * well without the need of this module parameter. This is designed
  60  * only for testing the driver regulatory request, world roaming
  61  * and all possible combinations.
  62  *
  63  * @HWSIM_REGTEST_DISABLED: No regulatory tests are performed,
  64  *      this is the default value.
  65  * @HWSIM_REGTEST_DRIVER_REG_FOLLOW: Used for testing the driver regulatory
  66  *      hint, only one driver regulatory hint will be sent as such the
  67  *      secondary radios are expected to follow.
  68  * @HWSIM_REGTEST_DRIVER_REG_ALL: Used for testing the driver regulatory
  69  *      request with all radios reporting the same regulatory domain.
  70  * @HWSIM_REGTEST_DIFF_COUNTRY: Used for testing the drivers calling
  71  *      different regulatory domains requests. Expected behaviour is for
  72  *      an intersection to occur but each device will still use their
  73  *      respective regulatory requested domains. Subsequent radios will
  74  *      use the resulting intersection.
  75  * @HWSIM_REGTEST_WORLD_ROAM: Used for testing the world roaming. We accomplish
  76  *      this by using a custom beacon-capable regulatory domain for the first
  77  *      radio. All other device world roam.
  78  * @HWSIM_REGTEST_CUSTOM_WORLD: Used for testing the custom world regulatory
  79  *      domain requests. All radios will adhere to this custom world regulatory
  80  *      domain.
  81  * @HWSIM_REGTEST_CUSTOM_WORLD_2: Used for testing 2 custom world regulatory
  82  *      domain requests. The first radio will adhere to the first custom world
  83  *      regulatory domain, the second one to the second custom world regulatory
  84  *      domain. All other devices will world roam.
  85  * @HWSIM_REGTEST_STRICT_FOLLOW_: Used for testing strict regulatory domain
  86  *      settings, only the first radio will send a regulatory domain request
  87  *      and use strict settings. The rest of the radios are expected to follow.
  88  * @HWSIM_REGTEST_STRICT_ALL: Used for testing strict regulatory domain
  89  *      settings. All radios will adhere to this.
  90  * @HWSIM_REGTEST_STRICT_AND_DRIVER_REG: Used for testing strict regulatory
  91  *      domain settings, combined with secondary driver regulatory domain
  92  *      settings. The first radio will get a strict regulatory domain setting
  93  *      using the first driver regulatory request and the second radio will use
  94  *      non-strict settings using the second driver regulatory request. All
  95  *      other devices should follow the intersection created between the
  96  *      first two.
  97  * @HWSIM_REGTEST_ALL: Used for testing every possible mix. You will need
  98  *      at least 6 radios for a complete test. We will test in this order:
  99  *      1 - driver custom world regulatory domain
 100  *      2 - second custom world regulatory domain
 101  *      3 - first driver regulatory domain request
 102  *      4 - second driver regulatory domain request
 103  *      5 - strict regulatory domain settings using the third driver regulatory
 104  *          domain request
 105  *      6 and on - should follow the intersection of the 3rd, 4rth and 5th radio
 106  *                 regulatory requests.
 107  */
 108 enum hwsim_regtest {
 109         HWSIM_REGTEST_DISABLED = 0,
 110         HWSIM_REGTEST_DRIVER_REG_FOLLOW = 1,
 111         HWSIM_REGTEST_DRIVER_REG_ALL = 2,
 112         HWSIM_REGTEST_DIFF_COUNTRY = 3,
 113         HWSIM_REGTEST_WORLD_ROAM = 4,
 114         HWSIM_REGTEST_CUSTOM_WORLD = 5,
 115         HWSIM_REGTEST_CUSTOM_WORLD_2 = 6,
 116         HWSIM_REGTEST_STRICT_FOLLOW = 7,
 117         HWSIM_REGTEST_STRICT_ALL = 8,
 118         HWSIM_REGTEST_STRICT_AND_DRIVER_REG = 9,
 119         HWSIM_REGTEST_ALL = 10,
 120 };
 121
 122 /* Set to one of the HWSIM_REGTEST_* values above */
 123 static int regtest = HWSIM_REGTEST_DISABLED;
 124 module_param(regtest, int, 0444);
 125 MODULE_PARM_DESC(regtest, "The type of regulatory test we want to run");
 126
 127 static const char *hwsim_alpha2s[] = {
 128         "FI",
 129         "AL",
 130         "US",
 131         "DE",
 132         "JP",
 133         "AL",
 134 };
 135
 136 static const struct ieee80211_regdomain hwsim_world_regdom_custom_01 = {
 137         .n_reg_rules = 4,
 138         .alpha2 =  "99",
 139         .reg_rules = {
 140                 REG_RULE(2412-10, 2462+10, 40, 0, 20, 0),
 141                 REG_RULE(2484-10, 2484+10, 40, 0, 20, 0),
 142                 REG_RULE(5150-10, 5240+10, 40, 0, 30, 0),
 143                 REG_RULE(5745-10, 5825+10, 40, 0, 30, 0),
 144         }
 145 };
 146
 147 static const struct ieee80211_regdomain hwsim_world_regdom_custom_02 = {
 148         .n_reg_rules = 2,
 149         .alpha2 =  "99",
 150         .reg_rules = {
 151                 REG_RULE(2412-10, 2462+10, 40, 0, 20, 0),
 152                 REG_RULE(5725-10, 5850+10, 40, 0, 30,
 153                         NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS),
 154         }
 155 };
 156
 157 struct hwsim_vif_priv {
 158         u32 magic;
 159         u8 bssid[ETH_ALEN];
 160         bool assoc;
 161         u16 aid;
 162 };
 163
 164 #define HWSIM_VIF_MAGIC 0x69537748
 165
 166 static inline void hwsim_check_magic(struct ieee80211_vif *vif)
 167 {
 168         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 169         WARN_ON(vp->magic != HWSIM_VIF_MAGIC);
 170 }
 171
 172 static inline void hwsim_set_magic(struct ieee80211_vif *vif)
 173 {
 174         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 175         vp->magic = HWSIM_VIF_MAGIC;
 176 }
 177
 178 static inline void hwsim_clear_magic(struct ieee80211_vif *vif)
 179 {
 180         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 181         vp->magic = 0;
 182 }
 183
 184 struct hwsim_sta_priv {
 185         u32 magic;
 186 };
 187
 188 #define HWSIM_STA_MAGIC 0x6d537748
 189
 190 static inline void hwsim_check_sta_magic(struct ieee80211_sta *sta)
 191 {
 192         struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
 193         WARN_ON(sp->magic != HWSIM_STA_MAGIC);
 194 }
 195
 196 static inline void hwsim_set_sta_magic(struct ieee80211_sta *sta)
 197 {
 198         struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
 199         sp->magic = HWSIM_STA_MAGIC;
 200 }
 201
 202 static inline void hwsim_clear_sta_magic(struct ieee80211_sta *sta)
 203 {
 204         struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
 205         sp->magic = 0;
 206 }
 207
 208 static struct class *hwsim_class;
 209
 210 static struct net_device *hwsim_mon; /* global monitor netdev */
 211
 212 #define CHAN2G(_freq)  { \
 213         .band = IEEE80211_BAND_2GHZ, \
 214         .center_freq = (_freq), \
 215         .hw_value = (_freq), \
 216         .max_power = 20, \
 217 }
 218
 219 #define CHAN5G(_freq) { \
 220         .band = IEEE80211_BAND_5GHZ, \
 221         .center_freq = (_freq), \
 222         .hw_value = (_freq), \
 223         .max_power = 20, \
 224 }
 225
 226 static const struct ieee80211_channel hwsim_channels_2ghz[] = {
 227         CHAN2G(2412), /* Channel 1 */
 228         CHAN2G(2417), /* Channel 2 */
 229         CHAN2G(2422), /* Channel 3 */
 230         CHAN2G(2427), /* Channel 4 */
 231         CHAN2G(2432), /* Channel 5 */
 232         CHAN2G(2437), /* Channel 6 */
 233         CHAN2G(2442), /* Channel 7 */
 234         CHAN2G(2447), /* Channel 8 */
 235         CHAN2G(2452), /* Channel 9 */
 236         CHAN2G(2457), /* Channel 10 */
 237         CHAN2G(2462), /* Channel 11 */
 238         CHAN2G(2467), /* Channel 12 */
 239         CHAN2G(2472), /* Channel 13 */
 240         CHAN2G(2484), /* Channel 14 */
 241 };
 242
 243 static const struct ieee80211_channel hwsim_channels_5ghz[] = {
 244         CHAN5G(5180), /* Channel 36 */
 245         CHAN5G(5200), /* Channel 40 */
 246         CHAN5G(5220), /* Channel 44 */
 247         CHAN5G(5240), /* Channel 48 */
 248
 249         CHAN5G(5260), /* Channel 52 */
 250         CHAN5G(5280), /* Channel 56 */
 251         CHAN5G(5300), /* Channel 60 */
 252         CHAN5G(5320), /* Channel 64 */
 253
 254         CHAN5G(5500), /* Channel 100 */
 255         CHAN5G(5520), /* Channel 104 */
 256         CHAN5G(5540), /* Channel 108 */
 257         CHAN5G(5560), /* Channel 112 */
 258         CHAN5G(5580), /* Channel 116 */
 259         CHAN5G(5600), /* Channel 120 */
 260         CHAN5G(5620), /* Channel 124 */
 261         CHAN5G(5640), /* Channel 128 */
 262         CHAN5G(5660), /* Channel 132 */
 263         CHAN5G(5680), /* Channel 136 */
 264         CHAN5G(5700), /* Channel 140 */
 265
 266         CHAN5G(5745), /* Channel 149 */
 267         CHAN5G(5765), /* Channel 153 */
 268         CHAN5G(5785), /* Channel 157 */
 269         CHAN5G(5805), /* Channel 161 */
 270         CHAN5G(5825), /* Channel 165 */
 271 };
 272
 273 static const struct ieee80211_rate hwsim_rates[] = {
 274         { .bitrate = 10 },
 275         { .bitrate = 20, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
 276         { .bitrate = 55, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
 277         { .bitrate = 110, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
 278         { .bitrate = 60 },
 279         { .bitrate = 90 },
 280         { .bitrate = 120 },
 281         { .bitrate = 180 },
 282         { .bitrate = 240 },
 283         { .bitrate = 360 },
 284         { .bitrate = 480 },
 285         { .bitrate = 540 }
 286 };
 287
 288 static spinlock_t hwsim_radio_lock;
 289 static struct list_head hwsim_radios;
 290
 291 struct mac80211_hwsim_data {
 292         struct list_head list;
 293         struct ieee80211_hw *hw;
 294         struct device *dev;
 295         struct ieee80211_supported_band bands[IEEE80211_NUM_BANDS];
 296         struct ieee80211_channel channels_2ghz[ARRAY_SIZE(hwsim_channels_2ghz)];
 297         struct ieee80211_channel channels_5ghz[ARRAY_SIZE(hwsim_channels_5ghz)];
 298         struct ieee80211_rate rates[ARRAY_SIZE(hwsim_rates)];
 299
 300         struct mac_address addresses[2];
 301
 302         struct ieee80211_channel *channel;
 303         unsigned long beacon_int; /* in jiffies unit */
 304         unsigned int rx_filter;
 305         bool started, idle, scanning;
 306         struct mutex mutex;
 307         struct timer_list beacon_timer;
 308         enum ps_mode {
 309                 PS_DISABLED, PS_ENABLED, PS_AUTO_POLL, PS_MANUAL_POLL
 310         } ps;
 311         bool ps_poll_pending;
 312         struct dentry *debugfs;
 313         struct dentry *debugfs_ps;
 314
 315         struct sk_buff_head pending;    /* packets pending */
 316         /*
 317          * Only radios in the same group can communicate together (the
 318          * channel has to match too). Each bit represents a group. A
 319          * radio can be in more then one group.
 320          */
 321         u64 group;
 322         struct dentry *debugfs_group;
 323
 324         int power_level;
 325
 326         /* difference between this hw's clock and the real clock, in usecs */
 327         u64 tsf_offset;
 328 };
 329
 330
 331 struct hwsim_radiotap_hdr {
 332         struct ieee80211_radiotap_header hdr;
 333         __le64 rt_tsft;
 334         u8 rt_flags;
 335         u8 rt_rate;
 336         __le16 rt_channel;
 337         __le16 rt_chbitmask;
 338 } __packed;
 339
 340 /* MAC80211_HWSIM netlinf family */
 341 static struct genl_family hwsim_genl_family = {
 342         .id = GENL_ID_GENERATE,
 343         .hdrsize = 0,
 344         .name = "MAC80211_HWSIM",
 345         .version = 1,
 346         .maxattr = HWSIM_ATTR_MAX,
 347 };
 348
 349 /* MAC80211_HWSIM netlink policy */
 350
 351 static struct nla_policy hwsim_genl_policy[HWSIM_ATTR_MAX + 1] = {
 352         [HWSIM_ATTR_ADDR_RECEIVER] = { .type = NLA_UNSPEC,
 353                                        .len = 6*sizeof(u8) },
 354         [HWSIM_ATTR_ADDR_TRANSMITTER] = { .type = NLA_UNSPEC,
 355                                           .len = 6*sizeof(u8) },
 356         [HWSIM_ATTR_FRAME] = { .type = NLA_BINARY,
 357                                .len = IEEE80211_MAX_DATA_LEN },
 358         [HWSIM_ATTR_FLAGS] = { .type = NLA_U32 },
 359         [HWSIM_ATTR_RX_RATE] = { .type = NLA_U32 },
 360         [HWSIM_ATTR_SIGNAL] = { .type = NLA_U32 },
 361         [HWSIM_ATTR_TX_INFO] = { .type = NLA_UNSPEC,
 362                                  .len = IEEE80211_TX_MAX_RATES*sizeof(
 363                                         struct hwsim_tx_rate)},
 364         [HWSIM_ATTR_COOKIE] = { .type = NLA_U64 },
 365 };
 366
 367 static netdev_tx_t hwsim_mon_xmit(struct sk_buff *skb,
 368                                         struct net_device *dev)
 369 {
 370         /* TODO: allow packet injection */
 371         dev_kfree_skb(skb);
 372         return NETDEV_TX_OK;
 373 }
 374
 375 static __le64 __mac80211_hwsim_get_tsf(struct mac80211_hwsim_data *data)
 376 {
 377         struct timeval tv = ktime_to_timeval(ktime_get_real());
 378         u64 now = tv.tv_sec * USEC_PER_SEC + tv.tv_usec;
 379         return cpu_to_le64(now + data->tsf_offset);
 380 }
 381
 382 static u64 mac80211_hwsim_get_tsf(struct ieee80211_hw *hw,
 383                 struct ieee80211_vif *vif)
 384 {
 385         struct mac80211_hwsim_data *data = hw->priv;
 386         return le64_to_cpu(__mac80211_hwsim_get_tsf(data));
 387 }
 388
 389 static void mac80211_hwsim_set_tsf(struct ieee80211_hw *hw,
 390                 struct ieee80211_vif *vif, u64 tsf)
 391 {
 392         struct mac80211_hwsim_data *data = hw->priv;
 393         struct timeval tv = ktime_to_timeval(ktime_get_real());
 394         u64 now = tv.tv_sec * USEC_PER_SEC + tv.tv_usec;
 395         data->tsf_offset = tsf - now;
 396 }
 397
 398 static void mac80211_hwsim_monitor_rx(struct ieee80211_hw *hw,
 399                                       struct sk_buff *tx_skb)
 400 {
 401         struct mac80211_hwsim_data *data = hw->priv;
 402         struct sk_buff *skb;
 403         struct hwsim_radiotap_hdr *hdr;
 404         u16 flags;
 405         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_skb);
 406         struct ieee80211_rate *txrate = ieee80211_get_tx_rate(hw, info);
 407
 408         if (!netif_running(hwsim_mon))
 409                 return;
 410
 411         skb = skb_copy_expand(tx_skb, sizeof(*hdr), 0, GFP_ATOMIC);
 412         if (skb == NULL)
 413                 return;
 414
 415         hdr = (struct hwsim_radiotap_hdr *) skb_push(skb, sizeof(*hdr));
 416         hdr->hdr.it_version = PKTHDR_RADIOTAP_VERSION;
 417         hdr->hdr.it_pad = 0;
 418         hdr->hdr.it_len = cpu_to_le16(sizeof(*hdr));
 419         hdr->hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
 420                                           (1 << IEEE80211_RADIOTAP_RATE) |
 421                                           (1 << IEEE80211_RADIOTAP_TSFT) |
 422                                           (1 << IEEE80211_RADIOTAP_CHANNEL));
 423         hdr->rt_tsft = __mac80211_hwsim_get_tsf(data);
 424         hdr->rt_flags = 0;
 425         hdr->rt_rate = txrate->bitrate / 5;
 426         hdr->rt_channel = cpu_to_le16(data->channel->center_freq);
 427         flags = IEEE80211_CHAN_2GHZ;
 428         if (txrate->flags & IEEE80211_RATE_ERP_G)
 429                 flags |= IEEE80211_CHAN_OFDM;
 430         else
 431                 flags |= IEEE80211_CHAN_CCK;
 432         hdr->rt_chbitmask = cpu_to_le16(flags);
 433
 434         skb->dev = hwsim_mon;
 435         skb_set_mac_header(skb, 0);
 436         skb->ip_summed = CHECKSUM_UNNECESSARY;
 437         skb->pkt_type = PACKET_OTHERHOST;
 438         skb->protocol = htons(ETH_P_802_2);
 439         memset(skb->cb, 0, sizeof(skb->cb));
 440         netif_rx(skb);
 441 }
 442
 443
 444 static void mac80211_hwsim_monitor_ack(struct ieee80211_hw *hw, const u8 *addr)
 445 {
 446         struct mac80211_hwsim_data *data = hw->priv;
 447         struct sk_buff *skb;
 448         struct hwsim_radiotap_hdr *hdr;
 449         u16 flags;
 450         struct ieee80211_hdr *hdr11;
 451
 452         if (!netif_running(hwsim_mon))
 453                 return;
 454
 455         skb = dev_alloc_skb(100);
 456         if (skb == NULL)
 457                 return;
 458
 459         hdr = (struct hwsim_radiotap_hdr *) skb_put(skb, sizeof(*hdr));
 460         hdr->hdr.it_version = PKTHDR_RADIOTAP_VERSION;
 461         hdr->hdr.it_pad = 0;
 462         hdr->hdr.it_len = cpu_to_le16(sizeof(*hdr));
 463         hdr->hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
 464                                           (1 << IEEE80211_RADIOTAP_CHANNEL));
 465         hdr->rt_flags = 0;
 466         hdr->rt_rate = 0;
 467         hdr->rt_channel = cpu_to_le16(data->channel->center_freq);
 468         flags = IEEE80211_CHAN_2GHZ;
 469         hdr->rt_chbitmask = cpu_to_le16(flags);
 470
 471         hdr11 = (struct ieee80211_hdr *) skb_put(skb, 10);
 472         hdr11->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
 473                                            IEEE80211_STYPE_ACK);
 474         hdr11->duration_id = cpu_to_le16(0);
 475         memcpy(hdr11->addr1, addr, ETH_ALEN);
 476
 477         skb->dev = hwsim_mon;
 478         skb_set_mac_header(skb, 0);
 479         skb->ip_summed = CHECKSUM_UNNECESSARY;
 480         skb->pkt_type = PACKET_OTHERHOST;
 481         skb->protocol = htons(ETH_P_802_2);
 482         memset(skb->cb, 0, sizeof(skb->cb));
 483         netif_rx(skb);
 484 }
 485
 486
 487 static bool hwsim_ps_rx_ok(struct mac80211_hwsim_data *data,
 488                            struct sk_buff *skb)
 489 {
 490         switch (data->ps) {
 491         case PS_DISABLED:
 492                 return true;
 493         case PS_ENABLED:
 494                 return false;
 495         case PS_AUTO_POLL:
 496                 /* TODO: accept (some) Beacons by default and other frames only
 497                  * if pending PS-Poll has been sent */
 498                 return true;
 499         case PS_MANUAL_POLL:
 500                 /* Allow unicast frames to own address if there is a pending
 501                  * PS-Poll */
 502                 if (data->ps_poll_pending &&
 503                     memcmp(data->hw->wiphy->perm_addr, skb->data + 4,
 504                            ETH_ALEN) == 0) {
 505                         data->ps_poll_pending = false;
 506                         return true;
 507                 }
 508                 return false;
 509         }
 510
 511         return true;
 512 }
 513
 514
 515 struct mac80211_hwsim_addr_match_data {
 516         bool ret;
 517         const u8 *addr;
 518 };
 519
 520 static void mac80211_hwsim_addr_iter(void *data, u8 *mac,
 521                                      struct ieee80211_vif *vif)
 522 {
 523         struct mac80211_hwsim_addr_match_data *md = data;
 524         if (memcmp(mac, md->addr, ETH_ALEN) == 0)
 525                 md->ret = true;
 526 }
 527
 528
 529 static bool mac80211_hwsim_addr_match(struct mac80211_hwsim_data *data,
 530                                       const u8 *addr)
 531 {
 532         struct mac80211_hwsim_addr_match_data md;
 533
 534         if (memcmp(addr, data->hw->wiphy->perm_addr, ETH_ALEN) == 0)
 535                 return true;
 536
 537         md.ret = false;
 538         md.addr = addr;
 539         ieee80211_iterate_active_interfaces_atomic(data->hw,
 540                                                    mac80211_hwsim_addr_iter,
 541                                                    &md);
 542
 543         return md.ret;
 544 }
 545
 546 static void mac80211_hwsim_tx_frame_nl(struct ieee80211_hw *hw,
 547                                        struct sk_buff *my_skb,
 548                                        int dst_pid)
 549 {
 550         struct sk_buff *skb;
 551         struct mac80211_hwsim_data *data = hw->priv;
 552         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) my_skb->data;
 553         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(my_skb);
 554         void *msg_head;
 555         unsigned int hwsim_flags = 0;
 556         int i;
 557         struct hwsim_tx_rate tx_attempts[IEEE80211_TX_MAX_RATES];
 558
 559         if (data->idle) {
 560                 wiphy_debug(hw->wiphy, "Trying to TX when idle - reject\n");
 561                 dev_kfree_skb(my_skb);
 562                 return;
 563         }
 564
 565         if (data->ps != PS_DISABLED)
 566                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 567         /* If the queue contains MAX_QUEUE skb's drop some */
 568         if (skb_queue_len(&data->pending) >= MAX_QUEUE) {
 569                 /* Droping until WARN_QUEUE level */
 570                 while (skb_queue_len(&data->pending) >= WARN_QUEUE)
 571                         skb_dequeue(&data->pending);
 572         }
 573
 574         skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_ATOMIC);
 575         if (skb == NULL)
 576                 goto nla_put_failure;
 577
 578         msg_head = genlmsg_put(skb, 0, 0, &hwsim_genl_family, 0,
 579                                HWSIM_CMD_FRAME);
 580         if (msg_head == NULL) {
 581                 printk(KERN_DEBUG "mac80211_hwsim: problem with msg_head\n");
 582                 goto nla_put_failure;
 583         }
 584
 585         if (nla_put(skb, HWSIM_ATTR_ADDR_TRANSMITTER,
 586                     sizeof(struct mac_address), data->addresses[1].addr))
 587                 goto nla_put_failure;
 588
 589         /* We get the skb->data */
 590         if (nla_put(skb, HWSIM_ATTR_FRAME, my_skb->len, my_skb->data))
 591                 goto nla_put_failure;
 592
 593         /* We get the flags for this transmission, and we translate them to
 594            wmediumd flags  */
 595
 596         if (info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS)
 597                 hwsim_flags |= HWSIM_TX_CTL_REQ_TX_STATUS;
 598
 599         if (info->flags & IEEE80211_TX_CTL_NO_ACK)
 600                 hwsim_flags |= HWSIM_TX_CTL_NO_ACK;
 601
 602         if (nla_put_u32(skb, HWSIM_ATTR_FLAGS, hwsim_flags))
 603                 goto nla_put_failure;
 604
 605         /* We get the tx control (rate and retries) info*/
 606
 607         for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
 608                 tx_attempts[i].idx = info->status.rates[i].idx;
 609                 tx_attempts[i].count = info->status.rates[i].count;
 610         }
 611
 612         if (nla_put(skb, HWSIM_ATTR_TX_INFO,
 613                     sizeof(struct hwsim_tx_rate)*IEEE80211_TX_MAX_RATES,
 614                     tx_attempts))
 615                 goto nla_put_failure;
 616
 617         /* We create a cookie to identify this skb */
 618         if (nla_put_u64(skb, HWSIM_ATTR_COOKIE, (unsigned long) my_skb))
 619                 goto nla_put_failure;
 620
 621         genlmsg_end(skb, msg_head);
 622         genlmsg_unicast(&init_net, skb, dst_pid);
 623
 624         /* Enqueue the packet */
 625         skb_queue_tail(&data->pending, my_skb);
 626         return;
 627
 628 nla_put_failure:
 629         printk(KERN_DEBUG "mac80211_hwsim: error occurred in %s\n", __func__);
 630 }
 631
 632 static bool mac80211_hwsim_tx_frame_no_nl(struct ieee80211_hw *hw,
 633                                           struct sk_buff *skb)
 634 {
 635         struct mac80211_hwsim_data *data = hw->priv, *data2;
 636         bool ack = false;
 637         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 638         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 639         struct ieee80211_rx_status rx_status;
 640         struct ieee80211_rate *txrate = ieee80211_get_tx_rate(hw, info);
 641
 642         if (data->idle) {
 643                 wiphy_debug(hw->wiphy, "Trying to TX when idle - reject\n");
 644                 return false;
 645         }
 646
 647         memset(&rx_status, 0, sizeof(rx_status));
 648         rx_status.flag |= RX_FLAG_MACTIME_MPDU;
 649         rx_status.freq = data->channel->center_freq;
 650         rx_status.band = data->channel->band;
 651         rx_status.rate_idx = info->control.rates[0].idx;
 652         if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS)
 653                 rx_status.flag |= RX_FLAG_HT;
 654         if (info->control.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
 655                 rx_status.flag |= RX_FLAG_40MHZ;
 656         if (info->control.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
 657                 rx_status.flag |= RX_FLAG_SHORT_GI;
 658         /* TODO: simulate real signal strength (and optional packet loss) */
 659         rx_status.signal = data->power_level - 50;
 660
 661         if (data->ps != PS_DISABLED)
 662                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 663
 664         /* release the skb's source info */
 665         skb_orphan(skb);
 666         skb_dst_drop(skb);
 667         skb->mark = 0;
 668         secpath_reset(skb);
 669         nf_reset(skb);
 670
 671         /* Copy skb to all enabled radios that are on the current frequency */
 672         spin_lock(&hwsim_radio_lock);
 673         list_for_each_entry(data2, &hwsim_radios, list) {
 674                 struct sk_buff *nskb;
 675                 struct ieee80211_mgmt *mgmt;
 676
 677                 if (data == data2)
 678                         continue;
 679
 680                 if (data2->idle || !data2->started ||
 681                     !hwsim_ps_rx_ok(data2, skb) || !data2->channel ||
 682                     data->channel->center_freq != data2->channel->center_freq ||
 683                     !(data->group & data2->group))
 684                         continue;
 685
 686                 nskb = skb_copy(skb, GFP_ATOMIC);
 687                 if (nskb == NULL)
 688                         continue;
 689
 690                 if (mac80211_hwsim_addr_match(data2, hdr->addr1))
 691                         ack = true;
 692
 693                 /* set bcn timestamp relative to receiver mactime */
 694                 rx_status.mactime =
 695                                 le64_to_cpu(__mac80211_hwsim_get_tsf(data2));
 696                 mgmt = (struct ieee80211_mgmt *) nskb->data;
 697                 if (ieee80211_is_beacon(mgmt->frame_control) ||
 698                     ieee80211_is_probe_resp(mgmt->frame_control))
 699                         mgmt->u.beacon.timestamp = cpu_to_le64(
 700                                 rx_status.mactime +
 701                                 (data->tsf_offset - data2->tsf_offset) +
 702                                 24 * 8 * 10 / txrate->bitrate);
 703
 704                 memcpy(IEEE80211_SKB_RXCB(nskb), &rx_status, sizeof(rx_status));
 705                 ieee80211_rx_irqsafe(data2->hw, nskb);
 706         }
 707         spin_unlock(&hwsim_radio_lock);
 708
 709         return ack;
 710 }
 711
 712 static void mac80211_hwsim_tx(struct ieee80211_hw *hw,
 713                               struct ieee80211_tx_control *control,
 714                               struct sk_buff *skb)
 715 {
 716         bool ack;
 717         struct ieee80211_tx_info *txi;
 718         u32 _pid;
 719
 720         mac80211_hwsim_monitor_rx(hw, skb);
 721
 722         if (skb->len < 10) {
 723                 /* Should not happen; just a sanity check for addr1 use */
 724                 dev_kfree_skb(skb);
 725                 return;
 726         }
 727
 728         /* wmediumd mode check */
 729         _pid = ACCESS_ONCE(wmediumd_pid);
 730
 731         if (_pid)
 732                 return mac80211_hwsim_tx_frame_nl(hw, skb, _pid);
 733
 734         /* NO wmediumd detected, perfect medium simulation */
 735         ack = mac80211_hwsim_tx_frame_no_nl(hw, skb);
 736
 737         if (ack && skb->len >= 16) {
 738                 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 739                 mac80211_hwsim_monitor_ack(hw, hdr->addr2);
 740         }
 741
 742         txi = IEEE80211_SKB_CB(skb);
 743
 744         if (txi->control.vif)
 745                 hwsim_check_magic(txi->control.vif);
 746         if (control->sta)
 747                 hwsim_check_sta_magic(control->sta);
 748
 749         ieee80211_tx_info_clear_status(txi);
 750
 751         /* frame was transmitted at most favorable rate at first attempt */
 752         txi->control.rates[0].count = 1;
 753         txi->control.rates[1].idx = -1;
 754
 755         if (!(txi->flags & IEEE80211_TX_CTL_NO_ACK) && ack)
 756                 txi->flags |= IEEE80211_TX_STAT_ACK;
 757         ieee80211_tx_status_irqsafe(hw, skb);
 758 }
 759
 760
 761 static int mac80211_hwsim_start(struct ieee80211_hw *hw)
 762 {
 763         struct mac80211_hwsim_data *data = hw->priv;
 764         wiphy_debug(hw->wiphy, "%s\n", __func__);
 765         data->started = true;
 766         return 0;
 767 }
 768
 769
 770 static void mac80211_hwsim_stop(struct ieee80211_hw *hw)
 771 {
 772         struct mac80211_hwsim_data *data = hw->priv;
 773         data->started = false;
 774         del_timer(&data->beacon_timer);
 775         wiphy_debug(hw->wiphy, "%s\n", __func__);
 776 }
 777
 778
 779 static int mac80211_hwsim_add_interface(struct ieee80211_hw *hw,
 780                                         struct ieee80211_vif *vif)
 781 {
 782         wiphy_debug(hw->wiphy, "%s (type=%d mac_addr=%pM)\n",
 783                     __func__, ieee80211_vif_type_p2p(vif),
 784                     vif->addr);
 785         hwsim_set_magic(vif);
 786         return 0;
 787 }
 788
 789
 790 static int mac80211_hwsim_change_interface(struct ieee80211_hw *hw,
 791                                            struct ieee80211_vif *vif,
 792                                            enum nl80211_iftype newtype,
 793                                            bool newp2p)
 794 {
 795         newtype = ieee80211_iftype_p2p(newtype, newp2p);
 796         wiphy_debug(hw->wiphy,
 797                     "%s (old type=%d, new type=%d, mac_addr=%pM)\n",
 798                     __func__, ieee80211_vif_type_p2p(vif),
 799                     newtype, vif->addr);
 800         hwsim_check_magic(vif);
 801
 802         return 0;
 803 }
 804
 805 static void mac80211_hwsim_remove_interface(
 806         struct ieee80211_hw *hw, struct ieee80211_vif *vif)
 807 {
 808         wiphy_debug(hw->wiphy, "%s (type=%d mac_addr=%pM)\n",
 809                     __func__, ieee80211_vif_type_p2p(vif),
 810                     vif->addr);
 811         hwsim_check_magic(vif);
 812         hwsim_clear_magic(vif);
 813 }
 814
 815
 816 static void mac80211_hwsim_beacon_tx(void *arg, u8 *mac,
 817                                      struct ieee80211_vif *vif)
 818 {
 819         struct ieee80211_hw *hw = arg;
 820         struct sk_buff *skb;
 821         struct ieee80211_tx_info *info;
 822         u32 _pid;
 823
 824         hwsim_check_magic(vif);
 825
 826         if (vif->type != NL80211_IFTYPE_AP &&
 827             vif->type != NL80211_IFTYPE_MESH_POINT &&
 828             vif->type != NL80211_IFTYPE_ADHOC)
 829                 return;
 830
 831         skb = ieee80211_beacon_get(hw, vif);
 832         if (skb == NULL)
 833                 return;
 834         info = IEEE80211_SKB_CB(skb);
 835
 836         mac80211_hwsim_monitor_rx(hw, skb);
 837
 838         /* wmediumd mode check */
 839         _pid = ACCESS_ONCE(wmediumd_pid);
 840
 841         if (_pid)
 842                 return mac80211_hwsim_tx_frame_nl(hw, skb, _pid);
 843
 844         mac80211_hwsim_tx_frame_no_nl(hw, skb);
 845         dev_kfree_skb(skb);
 846 }
 847
 848
 849 static void mac80211_hwsim_beacon(unsigned long arg)
 850 {
 851         struct ieee80211_hw *hw = (struct ieee80211_hw *) arg;
 852         struct mac80211_hwsim_data *data = hw->priv;
 853
 854         if (!data->started)
 855                 return;
 856
 857         ieee80211_iterate_active_interfaces_atomic(
 858                 hw, mac80211_hwsim_beacon_tx, hw);
 859
 860         data->beacon_timer.expires = jiffies + data->beacon_int;
 861         add_timer(&data->beacon_timer);
 862 }
 863
 864 static const char *hwsim_chantypes[] = {
 865         [NL80211_CHAN_NO_HT] = "noht",
 866         [NL80211_CHAN_HT20] = "ht20",
 867         [NL80211_CHAN_HT40MINUS] = "ht40-",
 868         [NL80211_CHAN_HT40PLUS] = "ht40+",
 869 };
 870
 871 static int mac80211_hwsim_config(struct ieee80211_hw *hw, u32 changed)
 872 {
 873         struct mac80211_hwsim_data *data = hw->priv;
 874         struct ieee80211_conf *conf = &hw->conf;
 875         static const char *smps_modes[IEEE80211_SMPS_NUM_MODES] = {
 876                 [IEEE80211_SMPS_AUTOMATIC] = "auto",
 877                 [IEEE80211_SMPS_OFF] = "off",
 878                 [IEEE80211_SMPS_STATIC] = "static",
 879                 [IEEE80211_SMPS_DYNAMIC] = "dynamic",
 880         };
 881
 882         wiphy_debug(hw->wiphy,
 883                     "%s (freq=%d/%s idle=%d ps=%d smps=%s)\n",
 884                     __func__,
 885                     conf->channel->center_freq,
 886                     hwsim_chantypes[conf->channel_type],
 887                     !!(conf->flags & IEEE80211_CONF_IDLE),
 888                     !!(conf->flags & IEEE80211_CONF_PS),
 889                     smps_modes[conf->smps_mode]);
 890
 891         data->idle = !!(conf->flags & IEEE80211_CONF_IDLE);
 892
 893         data->channel = conf->channel;
 894         data->power_level = conf->power_level;
 895         if (!data->started || !data->beacon_int)
 896                 del_timer(&data->beacon_timer);
 897         else
 898                 mod_timer(&data->beacon_timer, jiffies + data->beacon_int);
 899
 900         return 0;
 901 }
 902
 903
 904 static void mac80211_hwsim_configure_filter(struct ieee80211_hw *hw,
 905                                             unsigned int changed_flags,
 906                                             unsigned int *total_flags,u64 multicast)
 907 {
 908         struct mac80211_hwsim_data *data = hw->priv;
 909
 910         wiphy_debug(hw->wiphy, "%s\n", __func__);
 911
 912         data->rx_filter = 0;
 913         if (*total_flags & FIF_PROMISC_IN_BSS)
 914                 data->rx_filter |= FIF_PROMISC_IN_BSS;
 915         if (*total_flags & FIF_ALLMULTI)
 916                 data->rx_filter |= FIF_ALLMULTI;
 917
 918         *total_flags = data->rx_filter;
 919 }
 920
 921 static void mac80211_hwsim_bss_info_changed(struct ieee80211_hw *hw,
 922                                             struct ieee80211_vif *vif,
 923                                             struct ieee80211_bss_conf *info,
 924                                             u32 changed)
 925 {
 926         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
 927         struct mac80211_hwsim_data *data = hw->priv;
 928
 929         hwsim_check_magic(vif);
 930
 931         wiphy_debug(hw->wiphy, "%s(changed=0x%x)\n", __func__, changed);
 932
 933         if (changed & BSS_CHANGED_BSSID) {
 934                 wiphy_debug(hw->wiphy, "%s: BSSID changed: %pM\n",
 935                             __func__, info->bssid);
 936                 memcpy(vp->bssid, info->bssid, ETH_ALEN);
 937         }
 938
 939         if (changed & BSS_CHANGED_ASSOC) {
 940                 wiphy_debug(hw->wiphy, "  ASSOC: assoc=%d aid=%d\n",
 941                             info->assoc, info->aid);
 942                 vp->assoc = info->assoc;
 943                 vp->aid = info->aid;
 944         }
 945
 946         if (changed & BSS_CHANGED_BEACON_INT) {
 947                 wiphy_debug(hw->wiphy, "  BCNINT: %d\n", info->beacon_int);
 948                 data->beacon_int = 1024 * info->beacon_int / 1000 * HZ / 1000;
 949                 if (WARN_ON(!data->beacon_int))
 950                         data->beacon_int = 1;
 951                 if (data->started)
 952                         mod_timer(&data->beacon_timer,
 953                                   jiffies + data->beacon_int);
 954         }
 955
 956         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
 957                 wiphy_debug(hw->wiphy, "  ERP_CTS_PROT: %d\n",
 958                             info->use_cts_prot);
 959         }
 960
 961         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
 962                 wiphy_debug(hw->wiphy, "  ERP_PREAMBLE: %d\n",
 963                             info->use_short_preamble);
 964         }
 965
 966         if (changed & BSS_CHANGED_ERP_SLOT) {
 967                 wiphy_debug(hw->wiphy, "  ERP_SLOT: %d\n", info->use_short_slot);
 968         }
 969
 970         if (changed & BSS_CHANGED_HT) {
 971                 wiphy_debug(hw->wiphy, "  HT: op_mode=0x%x, chantype=%s\n",
 972                             info->ht_operation_mode,
 973                             hwsim_chantypes[info->channel_type]);
 974         }
 975
 976         if (changed & BSS_CHANGED_BASIC_RATES) {
 977                 wiphy_debug(hw->wiphy, "  BASIC_RATES: 0x%llx\n",
 978                             (unsigned long long) info->basic_rates);
 979         }
 980 }
 981
 982 static int mac80211_hwsim_sta_add(struct ieee80211_hw *hw,
 983                                   struct ieee80211_vif *vif,
 984                                   struct ieee80211_sta *sta)
 985 {
 986         hwsim_check_magic(vif);
 987         hwsim_set_sta_magic(sta);
 988
 989         return 0;
 990 }
 991
 992 static int mac80211_hwsim_sta_remove(struct ieee80211_hw *hw,
 993                                      struct ieee80211_vif *vif,
 994                                      struct ieee80211_sta *sta)
 995 {
 996         hwsim_check_magic(vif);
 997         hwsim_clear_sta_magic(sta);
 998
 999         return 0;
1000 }
1001
1002 static void mac80211_hwsim_sta_notify(struct ieee80211_hw *hw,
1003                                       struct ieee80211_vif *vif,
1004                                       enum sta_notify_cmd cmd,
1005                                       struct ieee80211_sta *sta)
1006 {
1007         hwsim_check_magic(vif);
1008
1009         switch (cmd) {
1010         case STA_NOTIFY_SLEEP:
1011         case STA_NOTIFY_AWAKE:
1012                 /* TODO: make good use of these flags */
1013                 break;
1014         default:
1015                 WARN(1, "Invalid sta notify: %d\n", cmd);
1016                 break;
1017         }
1018 }
1019
1020 static int mac80211_hwsim_set_tim(struct ieee80211_hw *hw,
1021                                   struct ieee80211_sta *sta,
1022                                   bool set)
1023 {
1024         hwsim_check_sta_magic(sta);
1025         return 0;
1026 }
1027
1028 static int mac80211_hwsim_conf_tx(
1029         struct ieee80211_hw *hw,
1030         struct ieee80211_vif *vif, u16 queue,
1031         const struct ieee80211_tx_queue_params *params)
1032 {
1033         wiphy_debug(hw->wiphy,
1034                     "%s (queue=%d txop=%d cw_min=%d cw_max=%d aifs=%d)\n",
1035                     __func__, queue,
1036                     params->txop, params->cw_min,
1037                     params->cw_max, params->aifs);
1038         return 0;
1039 }
1040
1041 static int mac80211_hwsim_get_survey(
1042         struct ieee80211_hw *hw, int idx,
1043         struct survey_info *survey)
1044 {
1045         struct ieee80211_conf *conf = &hw->conf;
1046
1047         wiphy_debug(hw->wiphy, "%s (idx=%d)\n", __func__, idx);
1048
1049         if (idx != 0)
1050                 return -ENOENT;
1051
1052         /* Current channel */
1053         survey->channel = conf->channel;
1054
1055         /*
1056          * Magically conjured noise level --- this is only ok for simulated hardware.
1057          *
1058          * A real driver which cannot determine the real channel noise MUST NOT
1059          * report any noise, especially not a magically conjured one :-)
1060          */
1061         survey->filled = SURVEY_INFO_NOISE_DBM;
1062         survey->noise = -92;
1063
1064         return 0;
1065 }
1066
1067 #ifdef CONFIG_NL80211_TESTMODE
1068 /*
1069  * This section contains example code for using netlink
1070  * attributes with the testmode command in nl80211.
1071  */
1072
1073 /* These enums need to be kept in sync with userspace */
1074 enum hwsim_testmode_attr {
1075         __HWSIM_TM_ATTR_INVALID = 0,
1076         HWSIM_TM_ATTR_CMD       = 1,
1077         HWSIM_TM_ATTR_PS        = 2,
1078
1079         /* keep last */
1080         __HWSIM_TM_ATTR_AFTER_LAST,
1081         HWSIM_TM_ATTR_MAX       = __HWSIM_TM_ATTR_AFTER_LAST - 1
1082 };
1083
1084 enum hwsim_testmode_cmd {
1085         HWSIM_TM_CMD_SET_PS             = 0,
1086         HWSIM_TM_CMD_GET_PS             = 1,
1087         HWSIM_TM_CMD_STOP_QUEUES        = 2,
1088         HWSIM_TM_CMD_WAKE_QUEUES        = 3,
1089 };
1090
1091 static const struct nla_policy hwsim_testmode_policy[HWSIM_TM_ATTR_MAX + 1] = {
1092         [HWSIM_TM_ATTR_CMD] = { .type = NLA_U32 },
1093         [HWSIM_TM_ATTR_PS] = { .type = NLA_U32 },
1094 };
1095
1096 static int hwsim_fops_ps_write(void *dat, u64 val);
1097
1098 static int mac80211_hwsim_testmode_cmd(struct ieee80211_hw *hw,
1099                                        void *data, int len)
1100 {
1101         struct mac80211_hwsim_data *hwsim = hw->priv;
1102         struct nlattr *tb[HWSIM_TM_ATTR_MAX + 1];
1103         struct sk_buff *skb;
1104         int err, ps;
1105
1106         err = nla_parse(tb, HWSIM_TM_ATTR_MAX, data, len,
1107                         hwsim_testmode_policy);
1108         if (err)
1109                 return err;
1110
1111         if (!tb[HWSIM_TM_ATTR_CMD])
1112                 return -EINVAL;
1113
1114         switch (nla_get_u32(tb[HWSIM_TM_ATTR_CMD])) {
1115         case HWSIM_TM_CMD_SET_PS:
1116                 if (!tb[HWSIM_TM_ATTR_PS])
1117                         return -EINVAL;
1118                 ps = nla_get_u32(tb[HWSIM_TM_ATTR_PS]);
1119                 return hwsim_fops_ps_write(hwsim, ps);
1120         case HWSIM_TM_CMD_GET_PS:
1121                 skb = cfg80211_testmode_alloc_reply_skb(hw->wiphy,
1122                                                 nla_total_size(sizeof(u32)));
1123                 if (!skb)
1124                         return -ENOMEM;
1125                 if (nla_put_u32(skb, HWSIM_TM_ATTR_PS, hwsim->ps))
1126                         goto nla_put_failure;
1127                 return cfg80211_testmode_reply(skb);
1128         case HWSIM_TM_CMD_STOP_QUEUES:
1129                 ieee80211_stop_queues(hw);
1130                 return 0;
1131         case HWSIM_TM_CMD_WAKE_QUEUES:
1132                 ieee80211_wake_queues(hw);
1133                 return 0;
1134         default:
1135                 return -EOPNOTSUPP;
1136         }
1137
1138  nla_put_failure:
1139         kfree_skb(skb);
1140         return -ENOBUFS;
1141 }
1142 #endif
1143
1144 static int mac80211_hwsim_ampdu_action(struct ieee80211_hw *hw,
1145                                        struct ieee80211_vif *vif,
1146                                        enum ieee80211_ampdu_mlme_action action,
1147                                        struct ieee80211_sta *sta, u16 tid, u16 *ssn,
1148                                        u8 buf_size)
1149 {
1150         switch (action) {
1151         case IEEE80211_AMPDU_TX_START:
1152                 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1153                 break;
1154         case IEEE80211_AMPDU_TX_STOP:
1155                 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1156                 break;
1157         case IEEE80211_AMPDU_TX_OPERATIONAL:
1158                 break;
1159         case IEEE80211_AMPDU_RX_START:
1160         case IEEE80211_AMPDU_RX_STOP:
1161                 break;
1162         default:
1163                 return -EOPNOTSUPP;
1164         }
1165
1166         return 0;
1167 }
1168
1169 static void mac80211_hwsim_flush(struct ieee80211_hw *hw, bool drop)
1170 {
1171         /* Not implemented, queues only on kernel side */
1172 }
1173
1174 struct hw_scan_done {
1175         struct delayed_work w;
1176         struct ieee80211_hw *hw;
1177 };
1178
1179 static void hw_scan_done(struct work_struct *work)
1180 {
1181         struct hw_scan_done *hsd =
1182                 container_of(work, struct hw_scan_done, w.work);
1183
1184         ieee80211_scan_completed(hsd->hw, false);
1185         kfree(hsd);
1186 }
1187
1188 static int mac80211_hwsim_hw_scan(struct ieee80211_hw *hw,
1189                                   struct ieee80211_vif *vif,
1190                                   struct cfg80211_scan_request *req)
1191 {
1192         struct hw_scan_done *hsd = kzalloc(sizeof(*hsd), GFP_KERNEL);
1193         int i;
1194
1195         if (!hsd)
1196                 return -ENOMEM;
1197
1198         hsd->hw = hw;
1199         INIT_DELAYED_WORK(&hsd->w, hw_scan_done);
1200
1201         printk(KERN_DEBUG "hwsim hw_scan request\n");
1202         for (i = 0; i < req->n_channels; i++)
1203                 printk(KERN_DEBUG "hwsim hw_scan freq %d\n",
1204                         req->channels[i]->center_freq);
1205         print_hex_dump(KERN_DEBUG, "scan IEs: ", DUMP_PREFIX_OFFSET,
1206                         16, 1, req->ie, req->ie_len, 1);
1207
1208         ieee80211_queue_delayed_work(hw, &hsd->w, 2 * HZ);
1209
1210         return 0;
1211 }
1212
1213 static void mac80211_hwsim_sw_scan(struct ieee80211_hw *hw)
1214 {
1215         struct mac80211_hwsim_data *hwsim = hw->priv;
1216
1217         mutex_lock(&hwsim->mutex);
1218
1219         if (hwsim->scanning) {
1220                 printk(KERN_DEBUG "two hwsim sw_scans detected!\n");
1221                 goto out;
1222         }
1223
1224         printk(KERN_DEBUG "hwsim sw_scan request, prepping stuff\n");
1225         hwsim->scanning = true;
1226
1227 out:
1228         mutex_unlock(&hwsim->mutex);
1229 }
1230
1231 static void mac80211_hwsim_sw_scan_complete(struct ieee80211_hw *hw)
1232 {
1233         struct mac80211_hwsim_data *hwsim = hw->priv;
1234
1235         mutex_lock(&hwsim->mutex);
1236
1237         printk(KERN_DEBUG "hwsim sw_scan_complete\n");
1238         hwsim->scanning = false;
1239
1240         mutex_unlock(&hwsim->mutex);
1241 }
1242
1243 static struct ieee80211_ops mac80211_hwsim_ops =
1244 {
1245         .tx = mac80211_hwsim_tx,
1246         .start = mac80211_hwsim_start,
1247         .stop = mac80211_hwsim_stop,
1248         .add_interface = mac80211_hwsim_add_interface,
1249         .change_interface = mac80211_hwsim_change_interface,
1250         .remove_interface = mac80211_hwsim_remove_interface,
1251         .config = mac80211_hwsim_config,
1252         .configure_filter = mac80211_hwsim_configure_filter,
1253         .bss_info_changed = mac80211_hwsim_bss_info_changed,
1254         .sta_add = mac80211_hwsim_sta_add,
1255         .sta_remove = mac80211_hwsim_sta_remove,
1256         .sta_notify = mac80211_hwsim_sta_notify,
1257         .set_tim = mac80211_hwsim_set_tim,
1258         .conf_tx = mac80211_hwsim_conf_tx,
1259         .get_survey = mac80211_hwsim_get_survey,
1260         CFG80211_TESTMODE_CMD(mac80211_hwsim_testmode_cmd)
1261         .ampdu_action = mac80211_hwsim_ampdu_action,
1262         .sw_scan_start = mac80211_hwsim_sw_scan,
1263         .sw_scan_complete = mac80211_hwsim_sw_scan_complete,
1264         .flush = mac80211_hwsim_flush,
1265         .get_tsf = mac80211_hwsim_get_tsf,
1266         .set_tsf = mac80211_hwsim_set_tsf,
1267 };
1268
1269
1270 static void mac80211_hwsim_free(void)
1271 {
1272         struct list_head tmplist, *i, *tmp;
1273         struct mac80211_hwsim_data *data, *tmpdata;
1274
1275         INIT_LIST_HEAD(&tmplist);
1276
1277         spin_lock_bh(&hwsim_radio_lock);
1278         list_for_each_safe(i, tmp, &hwsim_radios)
1279                 list_move(i, &tmplist);
1280         spin_unlock_bh(&hwsim_radio_lock);
1281
1282         list_for_each_entry_safe(data, tmpdata, &tmplist, list) {
1283                 debugfs_remove(data->debugfs_group);
1284                 debugfs_remove(data->debugfs_ps);
1285                 debugfs_remove(data->debugfs);
1286                 ieee80211_unregister_hw(data->hw);
1287                 device_unregister(data->dev);
1288                 ieee80211_free_hw(data->hw);
1289         }
1290         class_destroy(hwsim_class);
1291 }
1292
1293
1294 static struct device_driver mac80211_hwsim_driver = {
1295         .name = "mac80211_hwsim"
1296 };
1297
1298 static const struct net_device_ops hwsim_netdev_ops = {
1299         .ndo_start_xmit         = hwsim_mon_xmit,
1300         .ndo_change_mtu         = eth_change_mtu,
1301         .ndo_set_mac_address    = eth_mac_addr,
1302         .ndo_validate_addr      = eth_validate_addr,
1303 };
1304
1305 static void hwsim_mon_setup(struct net_device *dev)
1306 {
1307         dev->netdev_ops = &hwsim_netdev_ops;
1308         dev->destructor = free_netdev;
1309         ether_setup(dev);
1310         dev->tx_queue_len = 0;
1311         dev->type = ARPHRD_IEEE80211_RADIOTAP;
1312         memset(dev->dev_addr, 0, ETH_ALEN);
1313         dev->dev_addr[0] = 0x12;
1314 }
1315
1316
1317 static void hwsim_send_ps_poll(void *dat, u8 *mac, struct ieee80211_vif *vif)
1318 {
1319         struct mac80211_hwsim_data *data = dat;
1320         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
1321         struct sk_buff *skb;
1322         struct ieee80211_pspoll *pspoll;
1323         u32 _pid;
1324
1325         if (!vp->assoc)
1326                 return;
1327
1328         wiphy_debug(data->hw->wiphy,
1329                     "%s: send PS-Poll to %pM for aid %d\n",
1330                     __func__, vp->bssid, vp->aid);
1331
1332         skb = dev_alloc_skb(sizeof(*pspoll));
1333         if (!skb)
1334                 return;
1335         pspoll = (void *) skb_put(skb, sizeof(*pspoll));
1336         pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
1337                                             IEEE80211_STYPE_PSPOLL |
1338                                             IEEE80211_FCTL_PM);
1339         pspoll->aid = cpu_to_le16(0xc000 | vp->aid);
1340         memcpy(pspoll->bssid, vp->bssid, ETH_ALEN);
1341         memcpy(pspoll->ta, mac, ETH_ALEN);
1342
1343         /* wmediumd mode check */
1344         _pid = ACCESS_ONCE(wmediumd_pid);
1345
1346         if (_pid)
1347                 return mac80211_hwsim_tx_frame_nl(data->hw, skb, _pid);
1348
1349         if (!mac80211_hwsim_tx_frame_no_nl(data->hw, skb))
1350                 printk(KERN_DEBUG "%s: PS-poll frame not ack'ed\n", __func__);
1351         dev_kfree_skb(skb);
1352 }
1353
1354
1355 static void hwsim_send_nullfunc(struct mac80211_hwsim_data *data, u8 *mac,
1356                                 struct ieee80211_vif *vif, int ps)
1357 {
1358         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
1359         struct sk_buff *skb;
1360         struct ieee80211_hdr *hdr;
1361         u32 _pid;
1362
1363         if (!vp->assoc)
1364                 return;
1365
1366         wiphy_debug(data->hw->wiphy,
1367                     "%s: send data::nullfunc to %pM ps=%d\n",
1368                     __func__, vp->bssid, ps);
1369
1370         skb = dev_alloc_skb(sizeof(*hdr));
1371         if (!skb)
1372                 return;
1373         hdr = (void *) skb_put(skb, sizeof(*hdr) - ETH_ALEN);
1374         hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
1375                                          IEEE80211_STYPE_NULLFUNC |
1376                                          (ps ? IEEE80211_FCTL_PM : 0));
1377         hdr->duration_id = cpu_to_le16(0);
1378         memcpy(hdr->addr1, vp->bssid, ETH_ALEN);
1379         memcpy(hdr->addr2, mac, ETH_ALEN);
1380         memcpy(hdr->addr3, vp->bssid, ETH_ALEN);
1381
1382         /* wmediumd mode check */
1383         _pid = ACCESS_ONCE(wmediumd_pid);
1384
1385         if (_pid)
1386                 return mac80211_hwsim_tx_frame_nl(data->hw, skb, _pid);
1387
1388         if (!mac80211_hwsim_tx_frame_no_nl(data->hw, skb))
1389                 printk(KERN_DEBUG "%s: nullfunc frame not ack'ed\n", __func__);
1390         dev_kfree_skb(skb);
1391 }
1392
1393
1394 static void hwsim_send_nullfunc_ps(void *dat, u8 *mac,
1395                                    struct ieee80211_vif *vif)
1396 {
1397         struct mac80211_hwsim_data *data = dat;
1398         hwsim_send_nullfunc(data, mac, vif, 1);
1399 }
1400
1401
1402 static void hwsim_send_nullfunc_no_ps(void *dat, u8 *mac,
1403                                       struct ieee80211_vif *vif)
1404 {
1405         struct mac80211_hwsim_data *data = dat;
1406         hwsim_send_nullfunc(data, mac, vif, 0);
1407 }
1408
1409
1410 static int hwsim_fops_ps_read(void *dat, u64 *val)
1411 {
1412         struct mac80211_hwsim_data *data = dat;
1413         *val = data->ps;
1414         return 0;
1415 }
1416
1417 static int hwsim_fops_ps_write(void *dat, u64 val)
1418 {
1419         struct mac80211_hwsim_data *data = dat;
1420         enum ps_mode old_ps;
1421
1422         if (val != PS_DISABLED && val != PS_ENABLED && val != PS_AUTO_POLL &&
1423             val != PS_MANUAL_POLL)
1424                 return -EINVAL;
1425
1426         old_ps = data->ps;
1427         data->ps = val;
1428
1429         if (val == PS_MANUAL_POLL) {
1430                 ieee80211_iterate_active_interfaces(data->hw,
1431                                                     hwsim_send_ps_poll, data);
1432                 data->ps_poll_pending = true;
1433         } else if (old_ps == PS_DISABLED && val != PS_DISABLED) {
1434                 ieee80211_iterate_active_interfaces(data->hw,
1435                                                     hwsim_send_nullfunc_ps,
1436                                                     data);
1437         } else if (old_ps != PS_DISABLED && val == PS_DISABLED) {
1438                 ieee80211_iterate_active_interfaces(data->hw,
1439                                                     hwsim_send_nullfunc_no_ps,
1440                                                     data);
1441         }
1442
1443         return 0;
1444 }
1445
1446 DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_ps, hwsim_fops_ps_read, hwsim_fops_ps_write,
1447                         "%llu\n");
1448
1449
1450 static int hwsim_fops_group_read(void *dat, u64 *val)
1451 {
1452         struct mac80211_hwsim_data *data = dat;
1453         *val = data->group;
1454         return 0;
1455 }
1456
1457 static int hwsim_fops_group_write(void *dat, u64 val)
1458 {
1459         struct mac80211_hwsim_data *data = dat;
1460         data->group = val;
1461         return 0;
1462 }
1463
1464 DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_group,
1465                         hwsim_fops_group_read, hwsim_fops_group_write,
1466                         "%llx\n");
1467
1468 static struct mac80211_hwsim_data *get_hwsim_data_ref_from_addr(
1469                              struct mac_address *addr)
1470 {
1471         struct mac80211_hwsim_data *data;
1472         bool _found = false;
1473
1474         spin_lock_bh(&hwsim_radio_lock);
1475         list_for_each_entry(data, &hwsim_radios, list) {
1476                 if (memcmp(data->addresses[1].addr, addr,
1477                           sizeof(struct mac_address)) == 0) {
1478                         _found = true;
1479                         break;
1480                 }
1481         }
1482         spin_unlock_bh(&hwsim_radio_lock);
1483
1484         if (!_found)
1485                 return NULL;
1486
1487         return data;
1488 }
1489
1490 static int hwsim_tx_info_frame_received_nl(struct sk_buff *skb_2,
1491                                            struct genl_info *info)
1492 {
1493
1494         struct ieee80211_hdr *hdr;
1495         struct mac80211_hwsim_data *data2;
1496         struct ieee80211_tx_info *txi;
1497         struct hwsim_tx_rate *tx_attempts;
1498         unsigned long ret_skb_ptr;
1499         struct sk_buff *skb, *tmp;
1500         struct mac_address *src;
1501         unsigned int hwsim_flags;
1502
1503         int i;
1504         bool found = false;
1505
1506         if (!info->attrs[HWSIM_ATTR_ADDR_TRANSMITTER] ||
1507            !info->attrs[HWSIM_ATTR_FLAGS] ||
1508            !info->attrs[HWSIM_ATTR_COOKIE] ||
1509            !info->attrs[HWSIM_ATTR_TX_INFO])
1510                 goto out;
1511
1512         src = (struct mac_address *)nla_data(
1513                                    info->attrs[HWSIM_ATTR_ADDR_TRANSMITTER]);
1514         hwsim_flags = nla_get_u32(info->attrs[HWSIM_ATTR_FLAGS]);
1515
1516         ret_skb_ptr = nla_get_u64(info->attrs[HWSIM_ATTR_COOKIE]);
1517
1518         data2 = get_hwsim_data_ref_from_addr(src);
1519
1520         if (data2 == NULL)
1521                 goto out;
1522
1523         /* look for the skb matching the cookie passed back from user */
1524         skb_queue_walk_safe(&data2->pending, skb, tmp) {
1525                 if ((unsigned long)skb == ret_skb_ptr) {
1526                         skb_unlink(skb, &data2->pending);
1527                         found = true;
1528                         break;
1529                 }
1530         }
1531
1532         /* not found */
1533         if (!found)
1534                 goto out;
1535
1536         /* Tx info received because the frame was broadcasted on user space,
1537          so we get all the necessary info: tx attempts and skb control buff */
1538
1539         tx_attempts = (struct hwsim_tx_rate *)nla_data(
1540                        info->attrs[HWSIM_ATTR_TX_INFO]);
1541
1542         /* now send back TX status */
1543         txi = IEEE80211_SKB_CB(skb);
1544
1545         ieee80211_tx_info_clear_status(txi);
1546
1547         for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
1548                 txi->status.rates[i].idx = tx_attempts[i].idx;
1549                 txi->status.rates[i].count = tx_attempts[i].count;
1550                 /*txi->status.rates[i].flags = 0;*/
1551         }
1552
1553         txi->status.ack_signal = nla_get_u32(info->attrs[HWSIM_ATTR_SIGNAL]);
1554
1555         if (!(hwsim_flags & HWSIM_TX_CTL_NO_ACK) &&
1556            (hwsim_flags & HWSIM_TX_STAT_ACK)) {
1557                 if (skb->len >= 16) {
1558                         hdr = (struct ieee80211_hdr *) skb->data;
1559                         mac80211_hwsim_monitor_ack(data2->hw, hdr->addr2);
1560                 }
1561                 txi->flags |= IEEE80211_TX_STAT_ACK;
1562         }
1563         ieee80211_tx_status_irqsafe(data2->hw, skb);
1564         return 0;
1565 out:
1566         return -EINVAL;
1567
1568 }
1569
1570 static int hwsim_cloned_frame_received_nl(struct sk_buff *skb_2,
1571                                           struct genl_info *info)
1572 {
1573
1574         struct mac80211_hwsim_data  *data2;
1575         struct ieee80211_rx_status rx_status;
1576         struct mac_address *dst;
1577         int frame_data_len;
1578         char *frame_data;
1579         struct sk_buff *skb = NULL;
1580
1581         if (!info->attrs[HWSIM_ATTR_ADDR_RECEIVER] ||
1582            !info->attrs[HWSIM_ATTR_FRAME] ||
1583            !info->attrs[HWSIM_ATTR_RX_RATE] ||
1584            !info->attrs[HWSIM_ATTR_SIGNAL])
1585                 goto out;
1586
1587         dst = (struct mac_address *)nla_data(
1588                                    info->attrs[HWSIM_ATTR_ADDR_RECEIVER]);
1589
1590         frame_data_len = nla_len(info->attrs[HWSIM_ATTR_FRAME]);
1591         frame_data = (char *)nla_data(info->attrs[HWSIM_ATTR_FRAME]);
1592
1593         /* Allocate new skb here */
1594         skb = alloc_skb(frame_data_len, GFP_KERNEL);
1595         if (skb == NULL)
1596                 goto err;
1597
1598         if (frame_data_len <= IEEE80211_MAX_DATA_LEN) {
1599                 /* Copy the data */
1600                 memcpy(skb_put(skb, frame_data_len), frame_data,
1601                        frame_data_len);
1602         } else
1603                 goto err;
1604
1605         data2 = get_hwsim_data_ref_from_addr(dst);
1606
1607         if (data2 == NULL)
1608                 goto out;
1609
1610         /* check if radio is configured properly */
1611
1612         if (data2->idle || !data2->started || !data2->channel)
1613                 goto out;
1614
1615         /*A frame is received from user space*/
1616         memset(&rx_status, 0, sizeof(rx_status));
1617         rx_status.freq = data2->channel->center_freq;
1618         rx_status.band = data2->channel->band;
1619         rx_status.rate_idx = nla_get_u32(info->attrs[HWSIM_ATTR_RX_RATE]);
1620         rx_status.signal = nla_get_u32(info->attrs[HWSIM_ATTR_SIGNAL]);
1621
1622         memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
1623         ieee80211_rx_irqsafe(data2->hw, skb);
1624
1625         return 0;
1626 err:
1627         printk(KERN_DEBUG "mac80211_hwsim: error occurred in %s\n", __func__);
1628         goto out;
1629 out:
1630         dev_kfree_skb(skb);
1631         return -EINVAL;
1632 }
1633
1634 static int hwsim_register_received_nl(struct sk_buff *skb_2,
1635                                       struct genl_info *info)
1636 {
1637         if (info == NULL)
1638                 goto out;
1639
1640         wmediumd_pid = info->snd_pid;
1641
1642         printk(KERN_DEBUG "mac80211_hwsim: received a REGISTER, "
1643                "switching to wmediumd mode with pid %d\n", info->snd_pid);
1644
1645         return 0;
1646 out:
1647         printk(KERN_DEBUG "mac80211_hwsim: error occurred in %s\n", __func__);
1648         return -EINVAL;
1649 }
1650
1651 /* Generic Netlink operations array */
1652 static struct genl_ops hwsim_ops[] = {
1653         {
1654                 .cmd = HWSIM_CMD_REGISTER,
1655                 .policy = hwsim_genl_policy,
1656                 .doit = hwsim_register_received_nl,
1657                 .flags = GENL_ADMIN_PERM,
1658         },
1659         {
1660                 .cmd = HWSIM_CMD_FRAME,
1661                 .policy = hwsim_genl_policy,
1662                 .doit = hwsim_cloned_frame_received_nl,
1663         },
1664         {
1665                 .cmd = HWSIM_CMD_TX_INFO_FRAME,
1666                 .policy = hwsim_genl_policy,
1667                 .doit = hwsim_tx_info_frame_received_nl,
1668         },
1669 };
1670
1671 static int mac80211_hwsim_netlink_notify(struct notifier_block *nb,
1672                                          unsigned long state,
1673                                          void *_notify)
1674 {
1675         struct netlink_notify *notify = _notify;
1676
1677         if (state != NETLINK_URELEASE)
1678                 return NOTIFY_DONE;
1679
1680         if (notify->pid == wmediumd_pid) {
1681                 printk(KERN_INFO "mac80211_hwsim: wmediumd released netlink"
1682                        " socket, switching to perfect channel medium\n");
1683                 wmediumd_pid = 0;
1684         }
1685         return NOTIFY_DONE;
1686
1687 }
1688
1689 static struct notifier_block hwsim_netlink_notifier = {
1690         .notifier_call = mac80211_hwsim_netlink_notify,
1691 };
1692
1693 static int hwsim_init_netlink(void)
1694 {
1695         int rc;
1696         printk(KERN_INFO "mac80211_hwsim: initializing netlink\n");
1697
1698         rc = genl_register_family_with_ops(&hwsim_genl_family,
1699                 hwsim_ops, ARRAY_SIZE(hwsim_ops));
1700         if (rc)
1701                 goto failure;
1702
1703         rc = netlink_register_notifier(&hwsim_netlink_notifier);
1704         if (rc)
1705                 goto failure;
1706
1707         return 0;
1708
1709 failure:
1710         printk(KERN_DEBUG "mac80211_hwsim: error occurred in %s\n", __func__);
1711         return -EINVAL;
1712 }
1713
1714 static void hwsim_exit_netlink(void)
1715 {
1716         int ret;
1717
1718         printk(KERN_INFO "mac80211_hwsim: closing netlink\n");
1719         /* unregister the notifier */
1720         netlink_unregister_notifier(&hwsim_netlink_notifier);
1721         /* unregister the family */
1722         ret = genl_unregister_family(&hwsim_genl_family);
1723         if (ret)
1724                 printk(KERN_DEBUG "mac80211_hwsim: "
1725                        "unregister family %i\n", ret);
1726 }
1727
1728 static const struct ieee80211_iface_limit hwsim_if_limits[] = {
1729         { .max = 1, .types = BIT(NL80211_IFTYPE_ADHOC) },
1730         { .max = 2048,  .types = BIT(NL80211_IFTYPE_STATION) |
1731                                  BIT(NL80211_IFTYPE_P2P_CLIENT) |
1732 #ifdef CONFIG_MAC80211_MESH
1733                                  BIT(NL80211_IFTYPE_MESH_POINT) |
1734 #endif
1735                                  BIT(NL80211_IFTYPE_AP) |
1736                                  BIT(NL80211_IFTYPE_P2P_GO) },
1737         { .max = 1, .types = BIT(NL80211_IFTYPE_P2P_DEVICE) },
1738 };
1739
1740 static const struct ieee80211_iface_combination hwsim_if_comb = {
1741         .limits = hwsim_if_limits,
1742         .n_limits = ARRAY_SIZE(hwsim_if_limits),
1743         .max_interfaces = 2048,
1744         .num_different_channels = 1,
1745 };
1746
1747 static int __init init_mac80211_hwsim(void)
1748 {
1749         int i, err = 0;
1750         u8 addr[ETH_ALEN];
1751         struct mac80211_hwsim_data *data;
1752         struct ieee80211_hw *hw;
1753         enum ieee80211_band band;
1754
1755         if (radios < 1 || radios > 100)
1756                 return -EINVAL;
1757
1758         if (fake_hw_scan) {
1759                 mac80211_hwsim_ops.hw_scan = mac80211_hwsim_hw_scan;
1760                 mac80211_hwsim_ops.sw_scan_start = NULL;
1761                 mac80211_hwsim_ops.sw_scan_complete = NULL;
1762         }
1763
1764         spin_lock_init(&hwsim_radio_lock);
1765         INIT_LIST_HEAD(&hwsim_radios);
1766
1767         hwsim_class = class_create(THIS_MODULE, "mac80211_hwsim");
1768         if (IS_ERR(hwsim_class))
1769                 return PTR_ERR(hwsim_class);
1770
1771         memset(addr, 0, ETH_ALEN);
1772         addr[0] = 0x02;
1773
1774         for (i = 0; i < radios; i++) {
1775                 printk(KERN_DEBUG "mac80211_hwsim: Initializing radio %d\n",
1776                        i);
1777                 hw = ieee80211_alloc_hw(sizeof(*data), &mac80211_hwsim_ops);
1778                 if (!hw) {
1779                         printk(KERN_DEBUG "mac80211_hwsim: ieee80211_alloc_hw "
1780                                "failed\n");
1781                         err = -ENOMEM;
1782                         goto failed;
1783                 }
1784                 data = hw->priv;
1785                 data->hw = hw;
1786
1787                 data->dev = device_create(hwsim_class, NULL, 0, hw,
1788                                           "hwsim%d", i);
1789                 if (IS_ERR(data->dev)) {
1790                         printk(KERN_DEBUG
1791                                "mac80211_hwsim: device_create "
1792                                "failed (%ld)\n", PTR_ERR(data->dev));
1793                         err = -ENOMEM;
1794                         goto failed_drvdata;
1795                 }
1796                 data->dev->driver = &mac80211_hwsim_driver;
1797                 skb_queue_head_init(&data->pending);
1798
1799                 SET_IEEE80211_DEV(hw, data->dev);
1800                 addr[3] = i >> 8;
1801                 addr[4] = i;
1802                 memcpy(data->addresses[0].addr, addr, ETH_ALEN);
1803                 memcpy(data->addresses[1].addr, addr, ETH_ALEN);
1804                 data->addresses[1].addr[0] |= 0x40;
1805                 hw->wiphy->n_addresses = 2;
1806                 hw->wiphy->addresses = data->addresses;
1807
1808                 hw->wiphy->iface_combinations = &hwsim_if_comb;
1809                 hw->wiphy->n_iface_combinations = 1;
1810
1811                 if (fake_hw_scan) {
1812                         hw->wiphy->max_scan_ssids = 255;
1813                         hw->wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
1814                 }
1815
1816                 hw->channel_change_time = 1;
1817                 hw->queues = 4;
1818                 hw->wiphy->interface_modes =
1819                         BIT(NL80211_IFTYPE_STATION) |
1820                         BIT(NL80211_IFTYPE_AP) |
1821                         BIT(NL80211_IFTYPE_P2P_CLIENT) |
1822                         BIT(NL80211_IFTYPE_P2P_GO) |
1823                         BIT(NL80211_IFTYPE_ADHOC) |
1824                         BIT(NL80211_IFTYPE_MESH_POINT) |
1825                         BIT(NL80211_IFTYPE_P2P_DEVICE);
1826
1827                 hw->flags = IEEE80211_HW_MFP_CAPABLE |
1828                             IEEE80211_HW_SIGNAL_DBM |
1829                             IEEE80211_HW_SUPPORTS_STATIC_SMPS |
1830                             IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
1831                             IEEE80211_HW_AMPDU_AGGREGATION |
1832                             IEEE80211_HW_WANT_MONITOR_VIF;
1833
1834                 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS |
1835                                     WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
1836
1837                 /* ask mac80211 to reserve space for magic */
1838                 hw->vif_data_size = sizeof(struct hwsim_vif_priv);
1839                 hw->sta_data_size = sizeof(struct hwsim_sta_priv);
1840
1841                 memcpy(data->channels_2ghz, hwsim_channels_2ghz,
1842                         sizeof(hwsim_channels_2ghz));
1843                 memcpy(data->channels_5ghz, hwsim_channels_5ghz,
1844                         sizeof(hwsim_channels_5ghz));
1845                 memcpy(data->rates, hwsim_rates, sizeof(hwsim_rates));
1846
1847                 for (band = IEEE80211_BAND_2GHZ; band < IEEE80211_NUM_BANDS; band++) {
1848                         struct ieee80211_supported_band *sband = &data->bands[band];
1849                         switch (band) {
1850                         case IEEE80211_BAND_2GHZ:
1851                                 sband->channels = data->channels_2ghz;
1852                                 sband->n_channels =
1853                                         ARRAY_SIZE(hwsim_channels_2ghz);
1854                                 sband->bitrates = data->rates;
1855                                 sband->n_bitrates = ARRAY_SIZE(hwsim_rates);
1856                                 break;
1857                         case IEEE80211_BAND_5GHZ:
1858                                 sband->channels = data->channels_5ghz;
1859                                 sband->n_channels =
1860                                         ARRAY_SIZE(hwsim_channels_5ghz);
1861                                 sband->bitrates = data->rates + 4;
1862                                 sband->n_bitrates = ARRAY_SIZE(hwsim_rates) - 4;
1863                                 break;
1864                         default:
1865                                 continue;
1866                         }
1867
1868                         sband->ht_cap.ht_supported = true;
1869                         sband->ht_cap.cap = IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
1870                                 IEEE80211_HT_CAP_GRN_FLD |
1871                                 IEEE80211_HT_CAP_SGI_40 |
1872                                 IEEE80211_HT_CAP_DSSSCCK40;
1873                         sband->ht_cap.ampdu_factor = 0x3;
1874                         sband->ht_cap.ampdu_density = 0x6;
1875                         memset(&sband->ht_cap.mcs, 0,
1876                                sizeof(sband->ht_cap.mcs));
1877                         sband->ht_cap.mcs.rx_mask[0] = 0xff;
1878                         sband->ht_cap.mcs.rx_mask[1] = 0xff;
1879                         sband->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
1880
1881                         hw->wiphy->bands[band] = sband;
1882                 }
1883                 /* By default all radios are belonging to the first group */
1884                 data->group = 1;
1885                 mutex_init(&data->mutex);
1886
1887                 /* Enable frame retransmissions for lossy channels */
1888                 hw->max_rates = 4;
1889                 hw->max_rate_tries = 11;
1890
1891                 /* Work to be done prior to ieee80211_register_hw() */
1892                 switch (regtest) {
1893                 case HWSIM_REGTEST_DISABLED:
1894                 case HWSIM_REGTEST_DRIVER_REG_FOLLOW:
1895                 case HWSIM_REGTEST_DRIVER_REG_ALL:
1896                 case HWSIM_REGTEST_DIFF_COUNTRY:
1897                         /*
1898                          * Nothing to be done for driver regulatory domain
1899                          * hints prior to ieee80211_register_hw()
1900                          */
1901                         break;
1902                 case HWSIM_REGTEST_WORLD_ROAM:
1903                         if (i == 0) {
1904                                 hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY;
1905                                 wiphy_apply_custom_regulatory(hw->wiphy,
1906                                         &hwsim_world_regdom_custom_01);
1907                         }
1908                         break;
1909                 case HWSIM_REGTEST_CUSTOM_WORLD:
1910                         hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY;
1911                         wiphy_apply_custom_regulatory(hw->wiphy,
1912                                 &hwsim_world_regdom_custom_01);
1913                         break;
1914                 case HWSIM_REGTEST_CUSTOM_WORLD_2:
1915                         if (i == 0) {
1916                                 hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY;
1917                                 wiphy_apply_custom_regulatory(hw->wiphy,
1918                                         &hwsim_world_regdom_custom_01);
1919                         } else if (i == 1) {
1920                                 hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY;
1921                                 wiphy_apply_custom_regulatory(hw->wiphy,
1922                                         &hwsim_world_regdom_custom_02);
1923                         }
1924                         break;
1925                 case HWSIM_REGTEST_STRICT_ALL:
1926                         hw->wiphy->flags |= WIPHY_FLAG_STRICT_REGULATORY;
1927                         break;
1928                 case HWSIM_REGTEST_STRICT_FOLLOW:
1929                 case HWSIM_REGTEST_STRICT_AND_DRIVER_REG:
1930                         if (i == 0)
1931                                 hw->wiphy->flags |= WIPHY_FLAG_STRICT_REGULATORY;
1932                         break;
1933                 case HWSIM_REGTEST_ALL:
1934                         if (i == 0) {
1935                                 hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY;
1936                                 wiphy_apply_custom_regulatory(hw->wiphy,
1937                                         &hwsim_world_regdom_custom_01);
1938                         } else if (i == 1) {
1939                                 hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY;
1940                                 wiphy_apply_custom_regulatory(hw->wiphy,
1941                                         &hwsim_world_regdom_custom_02);
1942                         } else if (i == 4)
1943                                 hw->wiphy->flags |= WIPHY_FLAG_STRICT_REGULATORY;
1944                         break;
1945                 default:
1946                         break;
1947                 }
1948
1949                 /* give the regulatory workqueue a chance to run */
1950                 if (regtest)
1951                         schedule_timeout_interruptible(1);
1952                 err = ieee80211_register_hw(hw);
1953                 if (err < 0) {
1954                         printk(KERN_DEBUG "mac80211_hwsim: "
1955                                "ieee80211_register_hw failed (%d)\n", err);
1956                         goto failed_hw;
1957                 }
1958
1959                 /* Work to be done after to ieee80211_register_hw() */
1960                 switch (regtest) {
1961                 case HWSIM_REGTEST_WORLD_ROAM:
1962                 case HWSIM_REGTEST_DISABLED:
1963                         break;
1964                 case HWSIM_REGTEST_DRIVER_REG_FOLLOW:
1965                         if (!i)
1966                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
1967                         break;
1968                 case HWSIM_REGTEST_DRIVER_REG_ALL:
1969                 case HWSIM_REGTEST_STRICT_ALL:
1970                         regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
1971                         break;
1972                 case HWSIM_REGTEST_DIFF_COUNTRY:
1973                         if (i < ARRAY_SIZE(hwsim_alpha2s))
1974                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[i]);
1975                         break;
1976                 case HWSIM_REGTEST_CUSTOM_WORLD:
1977                 case HWSIM_REGTEST_CUSTOM_WORLD_2:
1978                         /*
1979                          * Nothing to be done for custom world regulatory
1980                          * domains after to ieee80211_register_hw
1981                          */
1982                         break;
1983                 case HWSIM_REGTEST_STRICT_FOLLOW:
1984                         if (i == 0)
1985                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
1986                         break;
1987                 case HWSIM_REGTEST_STRICT_AND_DRIVER_REG:
1988                         if (i == 0)
1989                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
1990                         else if (i == 1)
1991                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[1]);
1992                         break;
1993                 case HWSIM_REGTEST_ALL:
1994                         if (i == 2)
1995                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
1996                         else if (i == 3)
1997                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[1]);
1998                         else if (i == 4)
1999                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[2]);
2000                         break;
2001                 default:
2002                         break;
2003                 }
2004
2005                 wiphy_debug(hw->wiphy, "hwaddr %pm registered\n",
2006                             hw->wiphy->perm_addr);
2007
2008                 data->debugfs = debugfs_create_dir("hwsim",
2009                                                    hw->wiphy->debugfsdir);
2010                 data->debugfs_ps = debugfs_create_file("ps", 0666,
2011                                                        data->debugfs, data,
2012                                                        &hwsim_fops_ps);
2013                 data->debugfs_group = debugfs_create_file("group", 0666,
2014                                                         data->debugfs, data,
2015                                                         &hwsim_fops_group);
2016
2017                 setup_timer(&data->beacon_timer, mac80211_hwsim_beacon,
2018                             (unsigned long) hw);
2019
2020                 list_add_tail(&data->list, &hwsim_radios);
2021         }
2022
2023         hwsim_mon = alloc_netdev(0, "hwsim%d", hwsim_mon_setup);
2024         if (hwsim_mon == NULL)
2025                 goto failed;
2026
2027         rtnl_lock();
2028
2029         err = dev_alloc_name(hwsim_mon, hwsim_mon->name);
2030         if (err < 0)
2031                 goto failed_mon;
2032
2033
2034         err = register_netdevice(hwsim_mon);
2035         if (err < 0)
2036                 goto failed_mon;
2037
2038         rtnl_unlock();
2039
2040         err = hwsim_init_netlink();
2041         if (err < 0)
2042                 goto failed_nl;
2043
2044         return 0;
2045
2046 failed_nl:
2047         printk(KERN_DEBUG "mac_80211_hwsim: failed initializing netlink\n");
2048         return err;
2049
2050 failed_mon:
2051         rtnl_unlock();
2052         free_netdev(hwsim_mon);
2053         mac80211_hwsim_free();
2054         return err;
2055
2056 failed_hw:
2057         device_unregister(data->dev);
2058 failed_drvdata:
2059         ieee80211_free_hw(hw);
2060 failed:
2061         mac80211_hwsim_free();
2062         return err;
2063 }
2064
2065
2066 static void __exit exit_mac80211_hwsim(void)
2067 {
2068         printk(KERN_DEBUG "mac80211_hwsim: unregister radios\n");
2069
2070         hwsim_exit_netlink();
2071
2072         mac80211_hwsim_free();
2073         unregister_netdev(hwsim_mon);
2074 }
2075
2076
2077 module_init(init_mac80211_hwsim);
2078 module_exit(exit_mac80211_hwsim);