mac80211: clean up beacon interval settings
[linux-2.6.git] / 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  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License version 2 as
7  * published by the Free Software Foundation.
8  */
9
10 /*
11  * TODO:
12  * - IBSS mode simulation (Beacon transmission with competition for "air time")
13  * - RX filtering based on filter configuration (data->rx_filter)
14  */
15
16 #include <linux/list.h>
17 #include <linux/spinlock.h>
18 #include <net/mac80211.h>
19 #include <net/ieee80211_radiotap.h>
20 #include <linux/if_arp.h>
21 #include <linux/rtnetlink.h>
22 #include <linux/etherdevice.h>
23 #include <linux/debugfs.h>
24
25 MODULE_AUTHOR("Jouni Malinen");
26 MODULE_DESCRIPTION("Software simulator of 802.11 radio(s) for mac80211");
27 MODULE_LICENSE("GPL");
28
29 static int radios = 2;
30 module_param(radios, int, 0444);
31 MODULE_PARM_DESC(radios, "Number of simulated radios");
32
33 /**
34  * enum hwsim_regtest - the type of regulatory tests we offer
35  *
36  * These are the different values you can use for the regtest
37  * module parameter. This is useful to help test world roaming
38  * and the driver regulatory_hint() call and combinations of these.
39  * If you want to do specific alpha2 regulatory domain tests simply
40  * use the userspace regulatory request as that will be respected as
41  * well without the need of this module parameter. This is designed
42  * only for testing the driver regulatory request, world roaming
43  * and all possible combinations.
44  *
45  * @HWSIM_REGTEST_DISABLED: No regulatory tests are performed,
46  *      this is the default value.
47  * @HWSIM_REGTEST_DRIVER_REG_FOLLOW: Used for testing the driver regulatory
48  *      hint, only one driver regulatory hint will be sent as such the
49  *      secondary radios are expected to follow.
50  * @HWSIM_REGTEST_DRIVER_REG_ALL: Used for testing the driver regulatory
51  *      request with all radios reporting the same regulatory domain.
52  * @HWSIM_REGTEST_DIFF_COUNTRY: Used for testing the drivers calling
53  *      different regulatory domains requests. Expected behaviour is for
54  *      an intersection to occur but each device will still use their
55  *      respective regulatory requested domains. Subsequent radios will
56  *      use the resulting intersection.
57  * @HWSIM_REGTEST_WORLD_ROAM: Used for testing the world roaming. We acomplish
58  *      this by using a custom beacon-capable regulatory domain for the first
59  *      radio. All other device world roam.
60  * @HWSIM_REGTEST_CUSTOM_WORLD: Used for testing the custom world regulatory
61  *      domain requests. All radios will adhere to this custom world regulatory
62  *      domain.
63  * @HWSIM_REGTEST_CUSTOM_WORLD_2: Used for testing 2 custom world regulatory
64  *      domain requests. The first radio will adhere to the first custom world
65  *      regulatory domain, the second one to the second custom world regulatory
66  *      domain. All other devices will world roam.
67  * @HWSIM_REGTEST_STRICT_FOLLOW_: Used for testing strict regulatory domain
68  *      settings, only the first radio will send a regulatory domain request
69  *      and use strict settings. The rest of the radios are expected to follow.
70  * @HWSIM_REGTEST_STRICT_ALL: Used for testing strict regulatory domain
71  *      settings. All radios will adhere to this.
72  * @HWSIM_REGTEST_STRICT_AND_DRIVER_REG: Used for testing strict regulatory
73  *      domain settings, combined with secondary driver regulatory domain
74  *      settings. The first radio will get a strict regulatory domain setting
75  *      using the first driver regulatory request and the second radio will use
76  *      non-strict settings using the second driver regulatory request. All
77  *      other devices should follow the intersection created between the
78  *      first two.
79  * @HWSIM_REGTEST_ALL: Used for testing every possible mix. You will need
80  *      at least 6 radios for a complete test. We will test in this order:
81  *      1 - driver custom world regulatory domain
82  *      2 - second custom world regulatory domain
83  *      3 - first driver regulatory domain request
84  *      4 - second driver regulatory domain request
85  *      5 - strict regulatory domain settings using the third driver regulatory
86  *          domain request
87  *      6 and on - should follow the intersection of the 3rd, 4rth and 5th radio
88  *                 regulatory requests.
89  */
90 enum hwsim_regtest {
91         HWSIM_REGTEST_DISABLED = 0,
92         HWSIM_REGTEST_DRIVER_REG_FOLLOW = 1,
93         HWSIM_REGTEST_DRIVER_REG_ALL = 2,
94         HWSIM_REGTEST_DIFF_COUNTRY = 3,
95         HWSIM_REGTEST_WORLD_ROAM = 4,
96         HWSIM_REGTEST_CUSTOM_WORLD = 5,
97         HWSIM_REGTEST_CUSTOM_WORLD_2 = 6,
98         HWSIM_REGTEST_STRICT_FOLLOW = 7,
99         HWSIM_REGTEST_STRICT_ALL = 8,
100         HWSIM_REGTEST_STRICT_AND_DRIVER_REG = 9,
101         HWSIM_REGTEST_ALL = 10,
102 };
103
104 /* Set to one of the HWSIM_REGTEST_* values above */
105 static int regtest = HWSIM_REGTEST_DISABLED;
106 module_param(regtest, int, 0444);
107 MODULE_PARM_DESC(regtest, "The type of regulatory test we want to run");
108
109 static const char *hwsim_alpha2s[] = {
110         "FI",
111         "AL",
112         "US",
113         "DE",
114         "JP",
115         "AL",
116 };
117
118 static const struct ieee80211_regdomain hwsim_world_regdom_custom_01 = {
119         .n_reg_rules = 4,
120         .alpha2 =  "99",
121         .reg_rules = {
122                 REG_RULE(2412-10, 2462+10, 40, 0, 20, 0),
123                 REG_RULE(2484-10, 2484+10, 40, 0, 20, 0),
124                 REG_RULE(5150-10, 5240+10, 40, 0, 30, 0),
125                 REG_RULE(5745-10, 5825+10, 40, 0, 30, 0),
126         }
127 };
128
129 static const struct ieee80211_regdomain hwsim_world_regdom_custom_02 = {
130         .n_reg_rules = 2,
131         .alpha2 =  "99",
132         .reg_rules = {
133                 REG_RULE(2412-10, 2462+10, 40, 0, 20, 0),
134                 REG_RULE(5725-10, 5850+10, 40, 0, 30,
135                         NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS),
136         }
137 };
138
139 struct hwsim_vif_priv {
140         u32 magic;
141         u8 bssid[ETH_ALEN];
142         bool assoc;
143         u16 aid;
144 };
145
146 #define HWSIM_VIF_MAGIC 0x69537748
147
148 static inline void hwsim_check_magic(struct ieee80211_vif *vif)
149 {
150         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
151         WARN_ON(vp->magic != HWSIM_VIF_MAGIC);
152 }
153
154 static inline void hwsim_set_magic(struct ieee80211_vif *vif)
155 {
156         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
157         vp->magic = HWSIM_VIF_MAGIC;
158 }
159
160 static inline void hwsim_clear_magic(struct ieee80211_vif *vif)
161 {
162         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
163         vp->magic = 0;
164 }
165
166 struct hwsim_sta_priv {
167         u32 magic;
168 };
169
170 #define HWSIM_STA_MAGIC 0x6d537748
171
172 static inline void hwsim_check_sta_magic(struct ieee80211_sta *sta)
173 {
174         struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
175         WARN_ON(sp->magic != HWSIM_STA_MAGIC);
176 }
177
178 static inline void hwsim_set_sta_magic(struct ieee80211_sta *sta)
179 {
180         struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
181         sp->magic = HWSIM_STA_MAGIC;
182 }
183
184 static inline void hwsim_clear_sta_magic(struct ieee80211_sta *sta)
185 {
186         struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
187         sp->magic = 0;
188 }
189
190 static struct class *hwsim_class;
191
192 static struct net_device *hwsim_mon; /* global monitor netdev */
193
194 #define CHAN2G(_freq)  { \
195         .band = IEEE80211_BAND_2GHZ, \
196         .center_freq = (_freq), \
197         .hw_value = (_freq), \
198         .max_power = 20, \
199 }
200
201 #define CHAN5G(_freq) { \
202         .band = IEEE80211_BAND_5GHZ, \
203         .center_freq = (_freq), \
204         .hw_value = (_freq), \
205         .max_power = 20, \
206 }
207
208 static const struct ieee80211_channel hwsim_channels_2ghz[] = {
209         CHAN2G(2412), /* Channel 1 */
210         CHAN2G(2417), /* Channel 2 */
211         CHAN2G(2422), /* Channel 3 */
212         CHAN2G(2427), /* Channel 4 */
213         CHAN2G(2432), /* Channel 5 */
214         CHAN2G(2437), /* Channel 6 */
215         CHAN2G(2442), /* Channel 7 */
216         CHAN2G(2447), /* Channel 8 */
217         CHAN2G(2452), /* Channel 9 */
218         CHAN2G(2457), /* Channel 10 */
219         CHAN2G(2462), /* Channel 11 */
220         CHAN2G(2467), /* Channel 12 */
221         CHAN2G(2472), /* Channel 13 */
222         CHAN2G(2484), /* Channel 14 */
223 };
224
225 static const struct ieee80211_channel hwsim_channels_5ghz[] = {
226         CHAN5G(5180), /* Channel 36 */
227         CHAN5G(5200), /* Channel 40 */
228         CHAN5G(5220), /* Channel 44 */
229         CHAN5G(5240), /* Channel 48 */
230
231         CHAN5G(5260), /* Channel 52 */
232         CHAN5G(5280), /* Channel 56 */
233         CHAN5G(5300), /* Channel 60 */
234         CHAN5G(5320), /* Channel 64 */
235
236         CHAN5G(5500), /* Channel 100 */
237         CHAN5G(5520), /* Channel 104 */
238         CHAN5G(5540), /* Channel 108 */
239         CHAN5G(5560), /* Channel 112 */
240         CHAN5G(5580), /* Channel 116 */
241         CHAN5G(5600), /* Channel 120 */
242         CHAN5G(5620), /* Channel 124 */
243         CHAN5G(5640), /* Channel 128 */
244         CHAN5G(5660), /* Channel 132 */
245         CHAN5G(5680), /* Channel 136 */
246         CHAN5G(5700), /* Channel 140 */
247
248         CHAN5G(5745), /* Channel 149 */
249         CHAN5G(5765), /* Channel 153 */
250         CHAN5G(5785), /* Channel 157 */
251         CHAN5G(5805), /* Channel 161 */
252         CHAN5G(5825), /* Channel 165 */
253 };
254
255 static const struct ieee80211_rate hwsim_rates[] = {
256         { .bitrate = 10 },
257         { .bitrate = 20, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
258         { .bitrate = 55, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
259         { .bitrate = 110, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
260         { .bitrate = 60 },
261         { .bitrate = 90 },
262         { .bitrate = 120 },
263         { .bitrate = 180 },
264         { .bitrate = 240 },
265         { .bitrate = 360 },
266         { .bitrate = 480 },
267         { .bitrate = 540 }
268 };
269
270 static spinlock_t hwsim_radio_lock;
271 static struct list_head hwsim_radios;
272
273 struct mac80211_hwsim_data {
274         struct list_head list;
275         struct ieee80211_hw *hw;
276         struct device *dev;
277         struct ieee80211_supported_band bands[2];
278         struct ieee80211_channel channels_2ghz[ARRAY_SIZE(hwsim_channels_2ghz)];
279         struct ieee80211_channel channels_5ghz[ARRAY_SIZE(hwsim_channels_5ghz)];
280         struct ieee80211_rate rates[ARRAY_SIZE(hwsim_rates)];
281
282         struct ieee80211_channel *channel;
283         int radio_enabled;
284         unsigned long beacon_int; /* in jiffies unit */
285         unsigned int rx_filter;
286         int started;
287         struct timer_list beacon_timer;
288         enum ps_mode {
289                 PS_DISABLED, PS_ENABLED, PS_AUTO_POLL, PS_MANUAL_POLL
290         } ps;
291         bool ps_poll_pending;
292         struct dentry *debugfs;
293         struct dentry *debugfs_ps;
294 };
295
296
297 struct hwsim_radiotap_hdr {
298         struct ieee80211_radiotap_header hdr;
299         u8 rt_flags;
300         u8 rt_rate;
301         __le16 rt_channel;
302         __le16 rt_chbitmask;
303 } __attribute__ ((packed));
304
305
306 static int hwsim_mon_xmit(struct sk_buff *skb, struct net_device *dev)
307 {
308         /* TODO: allow packet injection */
309         dev_kfree_skb(skb);
310         return 0;
311 }
312
313
314 static void mac80211_hwsim_monitor_rx(struct ieee80211_hw *hw,
315                                       struct sk_buff *tx_skb)
316 {
317         struct mac80211_hwsim_data *data = hw->priv;
318         struct sk_buff *skb;
319         struct hwsim_radiotap_hdr *hdr;
320         u16 flags;
321         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_skb);
322         struct ieee80211_rate *txrate = ieee80211_get_tx_rate(hw, info);
323
324         if (!netif_running(hwsim_mon))
325                 return;
326
327         skb = skb_copy_expand(tx_skb, sizeof(*hdr), 0, GFP_ATOMIC);
328         if (skb == NULL)
329                 return;
330
331         hdr = (struct hwsim_radiotap_hdr *) skb_push(skb, sizeof(*hdr));
332         hdr->hdr.it_version = PKTHDR_RADIOTAP_VERSION;
333         hdr->hdr.it_pad = 0;
334         hdr->hdr.it_len = cpu_to_le16(sizeof(*hdr));
335         hdr->hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
336                                           (1 << IEEE80211_RADIOTAP_RATE) |
337                                           (1 << IEEE80211_RADIOTAP_CHANNEL));
338         hdr->rt_flags = 0;
339         hdr->rt_rate = txrate->bitrate / 5;
340         hdr->rt_channel = cpu_to_le16(data->channel->center_freq);
341         flags = IEEE80211_CHAN_2GHZ;
342         if (txrate->flags & IEEE80211_RATE_ERP_G)
343                 flags |= IEEE80211_CHAN_OFDM;
344         else
345                 flags |= IEEE80211_CHAN_CCK;
346         hdr->rt_chbitmask = cpu_to_le16(flags);
347
348         skb->dev = hwsim_mon;
349         skb_set_mac_header(skb, 0);
350         skb->ip_summed = CHECKSUM_UNNECESSARY;
351         skb->pkt_type = PACKET_OTHERHOST;
352         skb->protocol = htons(ETH_P_802_2);
353         memset(skb->cb, 0, sizeof(skb->cb));
354         netif_rx(skb);
355 }
356
357
358 static bool hwsim_ps_rx_ok(struct mac80211_hwsim_data *data,
359                            struct sk_buff *skb)
360 {
361         switch (data->ps) {
362         case PS_DISABLED:
363                 return true;
364         case PS_ENABLED:
365                 return false;
366         case PS_AUTO_POLL:
367                 /* TODO: accept (some) Beacons by default and other frames only
368                  * if pending PS-Poll has been sent */
369                 return true;
370         case PS_MANUAL_POLL:
371                 /* Allow unicast frames to own address if there is a pending
372                  * PS-Poll */
373                 if (data->ps_poll_pending &&
374                     memcmp(data->hw->wiphy->perm_addr, skb->data + 4,
375                            ETH_ALEN) == 0) {
376                         data->ps_poll_pending = false;
377                         return true;
378                 }
379                 return false;
380         }
381
382         return true;
383 }
384
385
386 static bool mac80211_hwsim_tx_frame(struct ieee80211_hw *hw,
387                                     struct sk_buff *skb)
388 {
389         struct mac80211_hwsim_data *data = hw->priv, *data2;
390         bool ack = false;
391         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
392         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
393         struct ieee80211_rx_status rx_status;
394
395         memset(&rx_status, 0, sizeof(rx_status));
396         /* TODO: set mactime */
397         rx_status.freq = data->channel->center_freq;
398         rx_status.band = data->channel->band;
399         rx_status.rate_idx = info->control.rates[0].idx;
400         /* TODO: simulate signal strength (and optional packet drop) */
401
402         if (data->ps != PS_DISABLED)
403                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
404
405         /* Copy skb to all enabled radios that are on the current frequency */
406         spin_lock(&hwsim_radio_lock);
407         list_for_each_entry(data2, &hwsim_radios, list) {
408                 struct sk_buff *nskb;
409
410                 if (data == data2)
411                         continue;
412
413                 if (!data2->started || !data2->radio_enabled ||
414                     !hwsim_ps_rx_ok(data2, skb) ||
415                     data->channel->center_freq != data2->channel->center_freq)
416                         continue;
417
418                 nskb = skb_copy(skb, GFP_ATOMIC);
419                 if (nskb == NULL)
420                         continue;
421
422                 if (memcmp(hdr->addr1, data2->hw->wiphy->perm_addr,
423                            ETH_ALEN) == 0)
424                         ack = true;
425                 ieee80211_rx_irqsafe(data2->hw, nskb, &rx_status);
426         }
427         spin_unlock(&hwsim_radio_lock);
428
429         return ack;
430 }
431
432
433 static int mac80211_hwsim_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
434 {
435         struct mac80211_hwsim_data *data = hw->priv;
436         bool ack;
437         struct ieee80211_tx_info *txi;
438
439         mac80211_hwsim_monitor_rx(hw, skb);
440
441         if (skb->len < 10) {
442                 /* Should not happen; just a sanity check for addr1 use */
443                 dev_kfree_skb(skb);
444                 return NETDEV_TX_OK;
445         }
446
447         if (!data->radio_enabled) {
448                 printk(KERN_DEBUG "%s: dropped TX frame since radio "
449                        "disabled\n", wiphy_name(hw->wiphy));
450                 dev_kfree_skb(skb);
451                 return NETDEV_TX_OK;
452         }
453
454         ack = mac80211_hwsim_tx_frame(hw, skb);
455
456         txi = IEEE80211_SKB_CB(skb);
457
458         if (txi->control.vif)
459                 hwsim_check_magic(txi->control.vif);
460         if (txi->control.sta)
461                 hwsim_check_sta_magic(txi->control.sta);
462
463         ieee80211_tx_info_clear_status(txi);
464         if (!(txi->flags & IEEE80211_TX_CTL_NO_ACK) && ack)
465                 txi->flags |= IEEE80211_TX_STAT_ACK;
466         ieee80211_tx_status_irqsafe(hw, skb);
467         return NETDEV_TX_OK;
468 }
469
470
471 static int mac80211_hwsim_start(struct ieee80211_hw *hw)
472 {
473         struct mac80211_hwsim_data *data = hw->priv;
474         printk(KERN_DEBUG "%s:%s\n", wiphy_name(hw->wiphy), __func__);
475         data->started = 1;
476         return 0;
477 }
478
479
480 static void mac80211_hwsim_stop(struct ieee80211_hw *hw)
481 {
482         struct mac80211_hwsim_data *data = hw->priv;
483         data->started = 0;
484         del_timer(&data->beacon_timer);
485         printk(KERN_DEBUG "%s:%s\n", wiphy_name(hw->wiphy), __func__);
486 }
487
488
489 static int mac80211_hwsim_add_interface(struct ieee80211_hw *hw,
490                                         struct ieee80211_if_init_conf *conf)
491 {
492         printk(KERN_DEBUG "%s:%s (type=%d mac_addr=%pM)\n",
493                wiphy_name(hw->wiphy), __func__, conf->type,
494                conf->mac_addr);
495         hwsim_set_magic(conf->vif);
496         return 0;
497 }
498
499
500 static void mac80211_hwsim_remove_interface(
501         struct ieee80211_hw *hw, struct ieee80211_if_init_conf *conf)
502 {
503         printk(KERN_DEBUG "%s:%s (type=%d mac_addr=%pM)\n",
504                wiphy_name(hw->wiphy), __func__, conf->type,
505                conf->mac_addr);
506         hwsim_check_magic(conf->vif);
507         hwsim_clear_magic(conf->vif);
508 }
509
510
511 static void mac80211_hwsim_beacon_tx(void *arg, u8 *mac,
512                                      struct ieee80211_vif *vif)
513 {
514         struct ieee80211_hw *hw = arg;
515         struct sk_buff *skb;
516         struct ieee80211_tx_info *info;
517
518         hwsim_check_magic(vif);
519
520         if (vif->type != NL80211_IFTYPE_AP &&
521             vif->type != NL80211_IFTYPE_MESH_POINT)
522                 return;
523
524         skb = ieee80211_beacon_get(hw, vif);
525         if (skb == NULL)
526                 return;
527         info = IEEE80211_SKB_CB(skb);
528
529         mac80211_hwsim_monitor_rx(hw, skb);
530         mac80211_hwsim_tx_frame(hw, skb);
531         dev_kfree_skb(skb);
532 }
533
534
535 static void mac80211_hwsim_beacon(unsigned long arg)
536 {
537         struct ieee80211_hw *hw = (struct ieee80211_hw *) arg;
538         struct mac80211_hwsim_data *data = hw->priv;
539
540         if (!data->started || !data->radio_enabled)
541                 return;
542
543         ieee80211_iterate_active_interfaces_atomic(
544                 hw, mac80211_hwsim_beacon_tx, hw);
545
546         data->beacon_timer.expires = jiffies + data->beacon_int;
547         add_timer(&data->beacon_timer);
548 }
549
550
551 static int mac80211_hwsim_config(struct ieee80211_hw *hw, u32 changed)
552 {
553         struct mac80211_hwsim_data *data = hw->priv;
554         struct ieee80211_conf *conf = &hw->conf;
555
556         printk(KERN_DEBUG "%s:%s (freq=%d radio_enabled=%d)\n",
557                wiphy_name(hw->wiphy), __func__,
558                conf->channel->center_freq, conf->radio_enabled);
559
560         data->channel = conf->channel;
561         data->radio_enabled = conf->radio_enabled;
562         if (!data->started || !data->radio_enabled || !data->beacon_int)
563                 del_timer(&data->beacon_timer);
564         else
565                 mod_timer(&data->beacon_timer, jiffies + data->beacon_int);
566
567         return 0;
568 }
569
570
571 static void mac80211_hwsim_configure_filter(struct ieee80211_hw *hw,
572                                             unsigned int changed_flags,
573                                             unsigned int *total_flags,
574                                             int mc_count,
575                                             struct dev_addr_list *mc_list)
576 {
577         struct mac80211_hwsim_data *data = hw->priv;
578
579         printk(KERN_DEBUG "%s:%s\n", wiphy_name(hw->wiphy), __func__);
580
581         data->rx_filter = 0;
582         if (*total_flags & FIF_PROMISC_IN_BSS)
583                 data->rx_filter |= FIF_PROMISC_IN_BSS;
584         if (*total_flags & FIF_ALLMULTI)
585                 data->rx_filter |= FIF_ALLMULTI;
586
587         *total_flags = data->rx_filter;
588 }
589
590 static int mac80211_hwsim_config_interface(struct ieee80211_hw *hw,
591                                            struct ieee80211_vif *vif,
592                                            struct ieee80211_if_conf *conf)
593 {
594         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
595
596         hwsim_check_magic(vif);
597         if (conf->changed & IEEE80211_IFCC_BSSID) {
598                 DECLARE_MAC_BUF(mac);
599                 printk(KERN_DEBUG "%s:%s: BSSID changed: %pM\n",
600                        wiphy_name(hw->wiphy), __func__,
601                        conf->bssid);
602                 memcpy(vp->bssid, conf->bssid, ETH_ALEN);
603         }
604         return 0;
605 }
606
607 static void mac80211_hwsim_bss_info_changed(struct ieee80211_hw *hw,
608                                             struct ieee80211_vif *vif,
609                                             struct ieee80211_bss_conf *info,
610                                             u32 changed)
611 {
612         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
613         struct mac80211_hwsim_data *data = hw->priv;
614
615         hwsim_check_magic(vif);
616
617         printk(KERN_DEBUG "%s:%s(changed=0x%x)\n",
618                wiphy_name(hw->wiphy), __func__, changed);
619
620         if (changed & BSS_CHANGED_ASSOC) {
621                 printk(KERN_DEBUG "  %s: ASSOC: assoc=%d aid=%d\n",
622                        wiphy_name(hw->wiphy), info->assoc, info->aid);
623                 vp->assoc = info->assoc;
624                 vp->aid = info->aid;
625         }
626
627         if (changed & BSS_CHANGED_BEACON_INT) {
628                 printk(KERN_DEBUG "  %s: BCNINT: %d\n",
629                        wiphy_name(hw->wiphy), info->beacon_int);
630                 data->beacon_int = 1024 * info->beacon_int / 1000 * HZ / 1000;
631                 if (WARN_ON(data->beacon_int))
632                         data->beacon_int = 1;
633         }
634
635         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
636                 printk(KERN_DEBUG "  %s: ERP_CTS_PROT: %d\n",
637                        wiphy_name(hw->wiphy), info->use_cts_prot);
638         }
639
640         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
641                 printk(KERN_DEBUG "  %s: ERP_PREAMBLE: %d\n",
642                        wiphy_name(hw->wiphy), info->use_short_preamble);
643         }
644
645         if (changed & BSS_CHANGED_ERP_SLOT) {
646                 printk(KERN_DEBUG "  %s: ERP_SLOT: %d\n",
647                        wiphy_name(hw->wiphy), info->use_short_slot);
648         }
649
650         if (changed & BSS_CHANGED_HT) {
651                 printk(KERN_DEBUG "  %s: HT: op_mode=0x%x\n",
652                        wiphy_name(hw->wiphy),
653                        info->ht.operation_mode);
654         }
655
656         if (changed & BSS_CHANGED_BASIC_RATES) {
657                 printk(KERN_DEBUG "  %s: BASIC_RATES: 0x%llx\n",
658                        wiphy_name(hw->wiphy),
659                        (unsigned long long) info->basic_rates);
660         }
661 }
662
663 static void mac80211_hwsim_sta_notify(struct ieee80211_hw *hw,
664                                       struct ieee80211_vif *vif,
665                                       enum sta_notify_cmd cmd,
666                                       struct ieee80211_sta *sta)
667 {
668         hwsim_check_magic(vif);
669         switch (cmd) {
670         case STA_NOTIFY_ADD:
671                 hwsim_set_sta_magic(sta);
672                 break;
673         case STA_NOTIFY_REMOVE:
674                 hwsim_clear_sta_magic(sta);
675                 break;
676         case STA_NOTIFY_SLEEP:
677         case STA_NOTIFY_AWAKE:
678                 /* TODO: make good use of these flags */
679                 break;
680         }
681 }
682
683 static int mac80211_hwsim_set_tim(struct ieee80211_hw *hw,
684                                   struct ieee80211_sta *sta,
685                                   bool set)
686 {
687         hwsim_check_sta_magic(sta);
688         return 0;
689 }
690
691 static int mac80211_hwsim_conf_tx(
692         struct ieee80211_hw *hw, u16 queue,
693         const struct ieee80211_tx_queue_params *params)
694 {
695         printk(KERN_DEBUG "%s:%s (queue=%d txop=%d cw_min=%d cw_max=%d "
696                "aifs=%d)\n",
697                wiphy_name(hw->wiphy), __func__, queue,
698                params->txop, params->cw_min, params->cw_max, params->aifs);
699         return 0;
700 }
701
702 static const struct ieee80211_ops mac80211_hwsim_ops =
703 {
704         .tx = mac80211_hwsim_tx,
705         .start = mac80211_hwsim_start,
706         .stop = mac80211_hwsim_stop,
707         .add_interface = mac80211_hwsim_add_interface,
708         .remove_interface = mac80211_hwsim_remove_interface,
709         .config = mac80211_hwsim_config,
710         .configure_filter = mac80211_hwsim_configure_filter,
711         .config_interface = mac80211_hwsim_config_interface,
712         .bss_info_changed = mac80211_hwsim_bss_info_changed,
713         .sta_notify = mac80211_hwsim_sta_notify,
714         .set_tim = mac80211_hwsim_set_tim,
715         .conf_tx = mac80211_hwsim_conf_tx,
716 };
717
718
719 static void mac80211_hwsim_free(void)
720 {
721         struct list_head tmplist, *i, *tmp;
722         struct mac80211_hwsim_data *data;
723
724         INIT_LIST_HEAD(&tmplist);
725
726         spin_lock_bh(&hwsim_radio_lock);
727         list_for_each_safe(i, tmp, &hwsim_radios)
728                 list_move(i, &tmplist);
729         spin_unlock_bh(&hwsim_radio_lock);
730
731         list_for_each_entry(data, &tmplist, list) {
732                 debugfs_remove(data->debugfs_ps);
733                 debugfs_remove(data->debugfs);
734                 ieee80211_unregister_hw(data->hw);
735                 device_unregister(data->dev);
736                 ieee80211_free_hw(data->hw);
737         }
738         class_destroy(hwsim_class);
739 }
740
741
742 static struct device_driver mac80211_hwsim_driver = {
743         .name = "mac80211_hwsim"
744 };
745
746 static const struct net_device_ops hwsim_netdev_ops = {
747         .ndo_start_xmit         = hwsim_mon_xmit,
748         .ndo_change_mtu         = eth_change_mtu,
749         .ndo_set_mac_address    = eth_mac_addr,
750         .ndo_validate_addr      = eth_validate_addr,
751 };
752
753 static void hwsim_mon_setup(struct net_device *dev)
754 {
755         dev->netdev_ops = &hwsim_netdev_ops;
756         dev->destructor = free_netdev;
757         ether_setup(dev);
758         dev->tx_queue_len = 0;
759         dev->type = ARPHRD_IEEE80211_RADIOTAP;
760         memset(dev->dev_addr, 0, ETH_ALEN);
761         dev->dev_addr[0] = 0x12;
762 }
763
764
765 static void hwsim_send_ps_poll(void *dat, u8 *mac, struct ieee80211_vif *vif)
766 {
767         struct mac80211_hwsim_data *data = dat;
768         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
769         DECLARE_MAC_BUF(buf);
770         struct sk_buff *skb;
771         struct ieee80211_pspoll *pspoll;
772
773         if (!vp->assoc)
774                 return;
775
776         printk(KERN_DEBUG "%s:%s: send PS-Poll to %pM for aid %d\n",
777                wiphy_name(data->hw->wiphy), __func__, vp->bssid, vp->aid);
778
779         skb = dev_alloc_skb(sizeof(*pspoll));
780         if (!skb)
781                 return;
782         pspoll = (void *) skb_put(skb, sizeof(*pspoll));
783         pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
784                                             IEEE80211_STYPE_PSPOLL |
785                                             IEEE80211_FCTL_PM);
786         pspoll->aid = cpu_to_le16(0xc000 | vp->aid);
787         memcpy(pspoll->bssid, vp->bssid, ETH_ALEN);
788         memcpy(pspoll->ta, mac, ETH_ALEN);
789         if (data->radio_enabled &&
790             !mac80211_hwsim_tx_frame(data->hw, skb))
791                 printk(KERN_DEBUG "%s: PS-Poll frame not ack'ed\n", __func__);
792         dev_kfree_skb(skb);
793 }
794
795
796 static void hwsim_send_nullfunc(struct mac80211_hwsim_data *data, u8 *mac,
797                                 struct ieee80211_vif *vif, int ps)
798 {
799         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
800         DECLARE_MAC_BUF(buf);
801         struct sk_buff *skb;
802         struct ieee80211_hdr *hdr;
803
804         if (!vp->assoc)
805                 return;
806
807         printk(KERN_DEBUG "%s:%s: send data::nullfunc to %pM ps=%d\n",
808                wiphy_name(data->hw->wiphy), __func__, vp->bssid, ps);
809
810         skb = dev_alloc_skb(sizeof(*hdr));
811         if (!skb)
812                 return;
813         hdr = (void *) skb_put(skb, sizeof(*hdr) - ETH_ALEN);
814         hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
815                                          IEEE80211_STYPE_NULLFUNC |
816                                          (ps ? IEEE80211_FCTL_PM : 0));
817         hdr->duration_id = cpu_to_le16(0);
818         memcpy(hdr->addr1, vp->bssid, ETH_ALEN);
819         memcpy(hdr->addr2, mac, ETH_ALEN);
820         memcpy(hdr->addr3, vp->bssid, ETH_ALEN);
821         if (data->radio_enabled &&
822             !mac80211_hwsim_tx_frame(data->hw, skb))
823                 printk(KERN_DEBUG "%s: nullfunc frame not ack'ed\n", __func__);
824         dev_kfree_skb(skb);
825 }
826
827
828 static void hwsim_send_nullfunc_ps(void *dat, u8 *mac,
829                                    struct ieee80211_vif *vif)
830 {
831         struct mac80211_hwsim_data *data = dat;
832         hwsim_send_nullfunc(data, mac, vif, 1);
833 }
834
835
836 static void hwsim_send_nullfunc_no_ps(void *dat, u8 *mac,
837                                       struct ieee80211_vif *vif)
838 {
839         struct mac80211_hwsim_data *data = dat;
840         hwsim_send_nullfunc(data, mac, vif, 0);
841 }
842
843
844 static int hwsim_fops_ps_read(void *dat, u64 *val)
845 {
846         struct mac80211_hwsim_data *data = dat;
847         *val = data->ps;
848         return 0;
849 }
850
851 static int hwsim_fops_ps_write(void *dat, u64 val)
852 {
853         struct mac80211_hwsim_data *data = dat;
854         enum ps_mode old_ps;
855
856         if (val != PS_DISABLED && val != PS_ENABLED && val != PS_AUTO_POLL &&
857             val != PS_MANUAL_POLL)
858                 return -EINVAL;
859
860         old_ps = data->ps;
861         data->ps = val;
862
863         if (val == PS_MANUAL_POLL) {
864                 ieee80211_iterate_active_interfaces(data->hw,
865                                                     hwsim_send_ps_poll, data);
866                 data->ps_poll_pending = true;
867         } else if (old_ps == PS_DISABLED && val != PS_DISABLED) {
868                 ieee80211_iterate_active_interfaces(data->hw,
869                                                     hwsim_send_nullfunc_ps,
870                                                     data);
871         } else if (old_ps != PS_DISABLED && val == PS_DISABLED) {
872                 ieee80211_iterate_active_interfaces(data->hw,
873                                                     hwsim_send_nullfunc_no_ps,
874                                                     data);
875         }
876
877         return 0;
878 }
879
880 DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_ps, hwsim_fops_ps_read, hwsim_fops_ps_write,
881                         "%llu\n");
882
883
884 static int __init init_mac80211_hwsim(void)
885 {
886         int i, err = 0;
887         u8 addr[ETH_ALEN];
888         struct mac80211_hwsim_data *data;
889         struct ieee80211_hw *hw;
890         enum ieee80211_band band;
891
892         if (radios < 1 || radios > 100)
893                 return -EINVAL;
894
895         spin_lock_init(&hwsim_radio_lock);
896         INIT_LIST_HEAD(&hwsim_radios);
897
898         hwsim_class = class_create(THIS_MODULE, "mac80211_hwsim");
899         if (IS_ERR(hwsim_class))
900                 return PTR_ERR(hwsim_class);
901
902         memset(addr, 0, ETH_ALEN);
903         addr[0] = 0x02;
904
905         for (i = 0; i < radios; i++) {
906                 printk(KERN_DEBUG "mac80211_hwsim: Initializing radio %d\n",
907                        i);
908                 hw = ieee80211_alloc_hw(sizeof(*data), &mac80211_hwsim_ops);
909                 if (!hw) {
910                         printk(KERN_DEBUG "mac80211_hwsim: ieee80211_alloc_hw "
911                                "failed\n");
912                         err = -ENOMEM;
913                         goto failed;
914                 }
915                 data = hw->priv;
916                 data->hw = hw;
917
918                 data->dev = device_create(hwsim_class, NULL, 0, hw,
919                                           "hwsim%d", i);
920                 if (IS_ERR(data->dev)) {
921                         printk(KERN_DEBUG
922                                "mac80211_hwsim: device_create "
923                                "failed (%ld)\n", PTR_ERR(data->dev));
924                         err = -ENOMEM;
925                         goto failed_drvdata;
926                 }
927                 data->dev->driver = &mac80211_hwsim_driver;
928
929                 SET_IEEE80211_DEV(hw, data->dev);
930                 addr[3] = i >> 8;
931                 addr[4] = i;
932                 SET_IEEE80211_PERM_ADDR(hw, addr);
933
934                 hw->channel_change_time = 1;
935                 hw->queues = 4;
936                 hw->wiphy->interface_modes =
937                         BIT(NL80211_IFTYPE_STATION) |
938                         BIT(NL80211_IFTYPE_AP) |
939                         BIT(NL80211_IFTYPE_MESH_POINT);
940
941                 hw->flags = IEEE80211_HW_MFP_CAPABLE;
942
943                 /* ask mac80211 to reserve space for magic */
944                 hw->vif_data_size = sizeof(struct hwsim_vif_priv);
945                 hw->sta_data_size = sizeof(struct hwsim_sta_priv);
946
947                 memcpy(data->channels_2ghz, hwsim_channels_2ghz,
948                         sizeof(hwsim_channels_2ghz));
949                 memcpy(data->channels_5ghz, hwsim_channels_5ghz,
950                         sizeof(hwsim_channels_5ghz));
951                 memcpy(data->rates, hwsim_rates, sizeof(hwsim_rates));
952
953                 for (band = IEEE80211_BAND_2GHZ; band < IEEE80211_NUM_BANDS; band++) {
954                         struct ieee80211_supported_band *sband = &data->bands[band];
955                         switch (band) {
956                         case IEEE80211_BAND_2GHZ:
957                                 sband->channels = data->channels_2ghz;
958                                 sband->n_channels =
959                                         ARRAY_SIZE(hwsim_channels_2ghz);
960                                 break;
961                         case IEEE80211_BAND_5GHZ:
962                                 sband->channels = data->channels_5ghz;
963                                 sband->n_channels =
964                                         ARRAY_SIZE(hwsim_channels_5ghz);
965                                 break;
966                         default:
967                                 break;
968                         }
969
970                         sband->bitrates = data->rates;
971                         sband->n_bitrates = ARRAY_SIZE(hwsim_rates);
972
973                         sband->ht_cap.ht_supported = true;
974                         sband->ht_cap.cap = IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
975                                 IEEE80211_HT_CAP_GRN_FLD |
976                                 IEEE80211_HT_CAP_SGI_40 |
977                                 IEEE80211_HT_CAP_DSSSCCK40;
978                         sband->ht_cap.ampdu_factor = 0x3;
979                         sband->ht_cap.ampdu_density = 0x6;
980                         memset(&sband->ht_cap.mcs, 0,
981                                sizeof(sband->ht_cap.mcs));
982                         sband->ht_cap.mcs.rx_mask[0] = 0xff;
983                         sband->ht_cap.mcs.rx_mask[1] = 0xff;
984                         sband->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
985
986                         hw->wiphy->bands[band] = sband;
987                 }
988
989                 /* Work to be done prior to ieee80211_register_hw() */
990                 switch (regtest) {
991                 case HWSIM_REGTEST_DISABLED:
992                 case HWSIM_REGTEST_DRIVER_REG_FOLLOW:
993                 case HWSIM_REGTEST_DRIVER_REG_ALL:
994                 case HWSIM_REGTEST_DIFF_COUNTRY:
995                         /*
996                          * Nothing to be done for driver regulatory domain
997                          * hints prior to ieee80211_register_hw()
998                          */
999                         break;
1000                 case HWSIM_REGTEST_WORLD_ROAM:
1001                         if (i == 0) {
1002                                 hw->wiphy->custom_regulatory = true;
1003                                 wiphy_apply_custom_regulatory(hw->wiphy,
1004                                         &hwsim_world_regdom_custom_01);
1005                         }
1006                         break;
1007                 case HWSIM_REGTEST_CUSTOM_WORLD:
1008                         hw->wiphy->custom_regulatory = true;
1009                         wiphy_apply_custom_regulatory(hw->wiphy,
1010                                 &hwsim_world_regdom_custom_01);
1011                         break;
1012                 case HWSIM_REGTEST_CUSTOM_WORLD_2:
1013                         if (i == 0) {
1014                                 hw->wiphy->custom_regulatory = true;
1015                                 wiphy_apply_custom_regulatory(hw->wiphy,
1016                                         &hwsim_world_regdom_custom_01);
1017                         } else if (i == 1) {
1018                                 hw->wiphy->custom_regulatory = true;
1019                                 wiphy_apply_custom_regulatory(hw->wiphy,
1020                                         &hwsim_world_regdom_custom_02);
1021                         }
1022                         break;
1023                 case HWSIM_REGTEST_STRICT_ALL:
1024                         hw->wiphy->strict_regulatory = true;
1025                         break;
1026                 case HWSIM_REGTEST_STRICT_FOLLOW:
1027                 case HWSIM_REGTEST_STRICT_AND_DRIVER_REG:
1028                         if (i == 0)
1029                                 hw->wiphy->strict_regulatory = true;
1030                         break;
1031                 case HWSIM_REGTEST_ALL:
1032                         if (i == 0) {
1033                                 hw->wiphy->custom_regulatory = true;
1034                                 wiphy_apply_custom_regulatory(hw->wiphy,
1035                                         &hwsim_world_regdom_custom_01);
1036                         } else if (i == 1) {
1037                                 hw->wiphy->custom_regulatory = true;
1038                                 wiphy_apply_custom_regulatory(hw->wiphy,
1039                                         &hwsim_world_regdom_custom_02);
1040                         } else if (i == 4)
1041                                 hw->wiphy->strict_regulatory = true;
1042                         break;
1043                 default:
1044                         break;
1045                 }
1046
1047                 /* give the regulatory workqueue a chance to run */
1048                 if (regtest)
1049                         schedule_timeout_interruptible(1);
1050                 err = ieee80211_register_hw(hw);
1051                 if (err < 0) {
1052                         printk(KERN_DEBUG "mac80211_hwsim: "
1053                                "ieee80211_register_hw failed (%d)\n", err);
1054                         goto failed_hw;
1055                 }
1056
1057                 /* Work to be done after to ieee80211_register_hw() */
1058                 switch (regtest) {
1059                 case HWSIM_REGTEST_WORLD_ROAM:
1060                 case HWSIM_REGTEST_DISABLED:
1061                         break;
1062                 case HWSIM_REGTEST_DRIVER_REG_FOLLOW:
1063                         if (!i)
1064                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
1065                         break;
1066                 case HWSIM_REGTEST_DRIVER_REG_ALL:
1067                 case HWSIM_REGTEST_STRICT_ALL:
1068                         regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
1069                         break;
1070                 case HWSIM_REGTEST_DIFF_COUNTRY:
1071                         if (i < ARRAY_SIZE(hwsim_alpha2s))
1072                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[i]);
1073                         break;
1074                 case HWSIM_REGTEST_CUSTOM_WORLD:
1075                 case HWSIM_REGTEST_CUSTOM_WORLD_2:
1076                         /*
1077                          * Nothing to be done for custom world regulatory
1078                          * domains after to ieee80211_register_hw
1079                          */
1080                         break;
1081                 case HWSIM_REGTEST_STRICT_FOLLOW:
1082                         if (i == 0)
1083                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
1084                         break;
1085                 case HWSIM_REGTEST_STRICT_AND_DRIVER_REG:
1086                         if (i == 0)
1087                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
1088                         else if (i == 1)
1089                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[1]);
1090                         break;
1091                 case HWSIM_REGTEST_ALL:
1092                         if (i == 2)
1093                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
1094                         else if (i == 3)
1095                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[1]);
1096                         else if (i == 4)
1097                                 regulatory_hint(hw->wiphy, hwsim_alpha2s[2]);
1098                         break;
1099                 default:
1100                         break;
1101                 }
1102
1103                 printk(KERN_DEBUG "%s: hwaddr %pM registered\n",
1104                        wiphy_name(hw->wiphy),
1105                        hw->wiphy->perm_addr);
1106
1107                 data->debugfs = debugfs_create_dir("hwsim",
1108                                                    hw->wiphy->debugfsdir);
1109                 data->debugfs_ps = debugfs_create_file("ps", 0666,
1110                                                        data->debugfs, data,
1111                                                        &hwsim_fops_ps);
1112
1113                 setup_timer(&data->beacon_timer, mac80211_hwsim_beacon,
1114                             (unsigned long) hw);
1115
1116                 list_add_tail(&data->list, &hwsim_radios);
1117         }
1118
1119         hwsim_mon = alloc_netdev(0, "hwsim%d", hwsim_mon_setup);
1120         if (hwsim_mon == NULL)
1121                 goto failed;
1122
1123         rtnl_lock();
1124
1125         err = dev_alloc_name(hwsim_mon, hwsim_mon->name);
1126         if (err < 0)
1127                 goto failed_mon;
1128
1129
1130         err = register_netdevice(hwsim_mon);
1131         if (err < 0)
1132                 goto failed_mon;
1133
1134         rtnl_unlock();
1135
1136         return 0;
1137
1138 failed_mon:
1139         rtnl_unlock();
1140         free_netdev(hwsim_mon);
1141         mac80211_hwsim_free();
1142         return err;
1143
1144 failed_hw:
1145         device_unregister(data->dev);
1146 failed_drvdata:
1147         ieee80211_free_hw(hw);
1148 failed:
1149         mac80211_hwsim_free();
1150         return err;
1151 }
1152
1153
1154 static void __exit exit_mac80211_hwsim(void)
1155 {
1156         printk(KERN_DEBUG "mac80211_hwsim: unregister radios\n");
1157
1158         unregister_netdev(hwsim_mon);
1159         mac80211_hwsim_free();
1160 }
1161
1162
1163 module_init(init_mac80211_hwsim);
1164 module_exit(exit_mac80211_hwsim);