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Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux...
[deliverable/linux.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 beacon_int=%d)\n",
557 wiphy_name(hw->wiphy), __func__,
558 conf->channel->center_freq, conf->radio_enabled,
559 conf->beacon_int);
560
561 data->channel = conf->channel;
562 data->radio_enabled = conf->radio_enabled;
563 data->beacon_int = 1024 * conf->beacon_int / 1000 * HZ / 1000;
564 if (data->beacon_int < 1)
565 data->beacon_int = 1;
566
567 if (!data->started || !data->radio_enabled)
568 del_timer(&data->beacon_timer);
569 else
570 mod_timer(&data->beacon_timer, jiffies + data->beacon_int);
571
572 return 0;
573 }
574
575
576 static void mac80211_hwsim_configure_filter(struct ieee80211_hw *hw,
577 unsigned int changed_flags,
578 unsigned int *total_flags,
579 int mc_count,
580 struct dev_addr_list *mc_list)
581 {
582 struct mac80211_hwsim_data *data = hw->priv;
583
584 printk(KERN_DEBUG "%s:%s\n", wiphy_name(hw->wiphy), __func__);
585
586 data->rx_filter = 0;
587 if (*total_flags & FIF_PROMISC_IN_BSS)
588 data->rx_filter |= FIF_PROMISC_IN_BSS;
589 if (*total_flags & FIF_ALLMULTI)
590 data->rx_filter |= FIF_ALLMULTI;
591
592 *total_flags = data->rx_filter;
593 }
594
595 static int mac80211_hwsim_config_interface(struct ieee80211_hw *hw,
596 struct ieee80211_vif *vif,
597 struct ieee80211_if_conf *conf)
598 {
599 struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
600
601 hwsim_check_magic(vif);
602 if (conf->changed & IEEE80211_IFCC_BSSID) {
603 DECLARE_MAC_BUF(mac);
604 printk(KERN_DEBUG "%s:%s: BSSID changed: %pM\n",
605 wiphy_name(hw->wiphy), __func__,
606 conf->bssid);
607 memcpy(vp->bssid, conf->bssid, ETH_ALEN);
608 }
609 return 0;
610 }
611
612 static void mac80211_hwsim_bss_info_changed(struct ieee80211_hw *hw,
613 struct ieee80211_vif *vif,
614 struct ieee80211_bss_conf *info,
615 u32 changed)
616 {
617 struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
618
619 hwsim_check_magic(vif);
620
621 printk(KERN_DEBUG "%s:%s(changed=0x%x)\n",
622 wiphy_name(hw->wiphy), __func__, changed);
623
624 if (changed & BSS_CHANGED_ASSOC) {
625 printk(KERN_DEBUG " %s: ASSOC: assoc=%d aid=%d\n",
626 wiphy_name(hw->wiphy), info->assoc, info->aid);
627 vp->assoc = info->assoc;
628 vp->aid = info->aid;
629 }
630
631 if (changed & BSS_CHANGED_ERP_CTS_PROT) {
632 printk(KERN_DEBUG " %s: ERP_CTS_PROT: %d\n",
633 wiphy_name(hw->wiphy), info->use_cts_prot);
634 }
635
636 if (changed & BSS_CHANGED_ERP_PREAMBLE) {
637 printk(KERN_DEBUG " %s: ERP_PREAMBLE: %d\n",
638 wiphy_name(hw->wiphy), info->use_short_preamble);
639 }
640
641 if (changed & BSS_CHANGED_ERP_SLOT) {
642 printk(KERN_DEBUG " %s: ERP_SLOT: %d\n",
643 wiphy_name(hw->wiphy), info->use_short_slot);
644 }
645
646 if (changed & BSS_CHANGED_HT) {
647 printk(KERN_DEBUG " %s: HT: op_mode=0x%x\n",
648 wiphy_name(hw->wiphy),
649 info->ht.operation_mode);
650 }
651
652 if (changed & BSS_CHANGED_BASIC_RATES) {
653 printk(KERN_DEBUG " %s: BASIC_RATES: 0x%llx\n",
654 wiphy_name(hw->wiphy),
655 (unsigned long long) info->basic_rates);
656 }
657 }
658
659 static void mac80211_hwsim_sta_notify(struct ieee80211_hw *hw,
660 struct ieee80211_vif *vif,
661 enum sta_notify_cmd cmd,
662 struct ieee80211_sta *sta)
663 {
664 hwsim_check_magic(vif);
665 switch (cmd) {
666 case STA_NOTIFY_ADD:
667 hwsim_set_sta_magic(sta);
668 break;
669 case STA_NOTIFY_REMOVE:
670 hwsim_clear_sta_magic(sta);
671 break;
672 case STA_NOTIFY_SLEEP:
673 case STA_NOTIFY_AWAKE:
674 /* TODO: make good use of these flags */
675 break;
676 }
677 }
678
679 static int mac80211_hwsim_set_tim(struct ieee80211_hw *hw,
680 struct ieee80211_sta *sta,
681 bool set)
682 {
683 hwsim_check_sta_magic(sta);
684 return 0;
685 }
686
687 static int mac80211_hwsim_conf_tx(
688 struct ieee80211_hw *hw, u16 queue,
689 const struct ieee80211_tx_queue_params *params)
690 {
691 printk(KERN_DEBUG "%s:%s (queue=%d txop=%d cw_min=%d cw_max=%d "
692 "aifs=%d)\n",
693 wiphy_name(hw->wiphy), __func__, queue,
694 params->txop, params->cw_min, params->cw_max, params->aifs);
695 return 0;
696 }
697
698 static const struct ieee80211_ops mac80211_hwsim_ops =
699 {
700 .tx = mac80211_hwsim_tx,
701 .start = mac80211_hwsim_start,
702 .stop = mac80211_hwsim_stop,
703 .add_interface = mac80211_hwsim_add_interface,
704 .remove_interface = mac80211_hwsim_remove_interface,
705 .config = mac80211_hwsim_config,
706 .configure_filter = mac80211_hwsim_configure_filter,
707 .config_interface = mac80211_hwsim_config_interface,
708 .bss_info_changed = mac80211_hwsim_bss_info_changed,
709 .sta_notify = mac80211_hwsim_sta_notify,
710 .set_tim = mac80211_hwsim_set_tim,
711 .conf_tx = mac80211_hwsim_conf_tx,
712 };
713
714
715 static void mac80211_hwsim_free(void)
716 {
717 struct list_head tmplist, *i, *tmp;
718 struct mac80211_hwsim_data *data;
719
720 INIT_LIST_HEAD(&tmplist);
721
722 spin_lock_bh(&hwsim_radio_lock);
723 list_for_each_safe(i, tmp, &hwsim_radios)
724 list_move(i, &tmplist);
725 spin_unlock_bh(&hwsim_radio_lock);
726
727 list_for_each_entry(data, &tmplist, list) {
728 debugfs_remove(data->debugfs_ps);
729 debugfs_remove(data->debugfs);
730 ieee80211_unregister_hw(data->hw);
731 device_unregister(data->dev);
732 ieee80211_free_hw(data->hw);
733 }
734 class_destroy(hwsim_class);
735 }
736
737
738 static struct device_driver mac80211_hwsim_driver = {
739 .name = "mac80211_hwsim"
740 };
741
742 static const struct net_device_ops hwsim_netdev_ops = {
743 .ndo_start_xmit = hwsim_mon_xmit,
744 .ndo_change_mtu = eth_change_mtu,
745 .ndo_set_mac_address = eth_mac_addr,
746 .ndo_validate_addr = eth_validate_addr,
747 };
748
749 static void hwsim_mon_setup(struct net_device *dev)
750 {
751 dev->netdev_ops = &hwsim_netdev_ops;
752 dev->destructor = free_netdev;
753 ether_setup(dev);
754 dev->tx_queue_len = 0;
755 dev->type = ARPHRD_IEEE80211_RADIOTAP;
756 memset(dev->dev_addr, 0, ETH_ALEN);
757 dev->dev_addr[0] = 0x12;
758 }
759
760
761 static void hwsim_send_ps_poll(void *dat, u8 *mac, struct ieee80211_vif *vif)
762 {
763 struct mac80211_hwsim_data *data = dat;
764 struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
765 DECLARE_MAC_BUF(buf);
766 struct sk_buff *skb;
767 struct ieee80211_pspoll *pspoll;
768
769 if (!vp->assoc)
770 return;
771
772 printk(KERN_DEBUG "%s:%s: send PS-Poll to %pM for aid %d\n",
773 wiphy_name(data->hw->wiphy), __func__, vp->bssid, vp->aid);
774
775 skb = dev_alloc_skb(sizeof(*pspoll));
776 if (!skb)
777 return;
778 pspoll = (void *) skb_put(skb, sizeof(*pspoll));
779 pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
780 IEEE80211_STYPE_PSPOLL |
781 IEEE80211_FCTL_PM);
782 pspoll->aid = cpu_to_le16(0xc000 | vp->aid);
783 memcpy(pspoll->bssid, vp->bssid, ETH_ALEN);
784 memcpy(pspoll->ta, mac, ETH_ALEN);
785 if (data->radio_enabled &&
786 !mac80211_hwsim_tx_frame(data->hw, skb))
787 printk(KERN_DEBUG "%s: PS-Poll frame not ack'ed\n", __func__);
788 dev_kfree_skb(skb);
789 }
790
791
792 static void hwsim_send_nullfunc(struct mac80211_hwsim_data *data, u8 *mac,
793 struct ieee80211_vif *vif, int ps)
794 {
795 struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
796 DECLARE_MAC_BUF(buf);
797 struct sk_buff *skb;
798 struct ieee80211_hdr *hdr;
799
800 if (!vp->assoc)
801 return;
802
803 printk(KERN_DEBUG "%s:%s: send data::nullfunc to %pM ps=%d\n",
804 wiphy_name(data->hw->wiphy), __func__, vp->bssid, ps);
805
806 skb = dev_alloc_skb(sizeof(*hdr));
807 if (!skb)
808 return;
809 hdr = (void *) skb_put(skb, sizeof(*hdr) - ETH_ALEN);
810 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
811 IEEE80211_STYPE_NULLFUNC |
812 (ps ? IEEE80211_FCTL_PM : 0));
813 hdr->duration_id = cpu_to_le16(0);
814 memcpy(hdr->addr1, vp->bssid, ETH_ALEN);
815 memcpy(hdr->addr2, mac, ETH_ALEN);
816 memcpy(hdr->addr3, vp->bssid, ETH_ALEN);
817 if (data->radio_enabled &&
818 !mac80211_hwsim_tx_frame(data->hw, skb))
819 printk(KERN_DEBUG "%s: nullfunc frame not ack'ed\n", __func__);
820 dev_kfree_skb(skb);
821 }
822
823
824 static void hwsim_send_nullfunc_ps(void *dat, u8 *mac,
825 struct ieee80211_vif *vif)
826 {
827 struct mac80211_hwsim_data *data = dat;
828 hwsim_send_nullfunc(data, mac, vif, 1);
829 }
830
831
832 static void hwsim_send_nullfunc_no_ps(void *dat, u8 *mac,
833 struct ieee80211_vif *vif)
834 {
835 struct mac80211_hwsim_data *data = dat;
836 hwsim_send_nullfunc(data, mac, vif, 0);
837 }
838
839
840 static int hwsim_fops_ps_read(void *dat, u64 *val)
841 {
842 struct mac80211_hwsim_data *data = dat;
843 *val = data->ps;
844 return 0;
845 }
846
847 static int hwsim_fops_ps_write(void *dat, u64 val)
848 {
849 struct mac80211_hwsim_data *data = dat;
850 enum ps_mode old_ps;
851
852 if (val != PS_DISABLED && val != PS_ENABLED && val != PS_AUTO_POLL &&
853 val != PS_MANUAL_POLL)
854 return -EINVAL;
855
856 old_ps = data->ps;
857 data->ps = val;
858
859 if (val == PS_MANUAL_POLL) {
860 ieee80211_iterate_active_interfaces(data->hw,
861 hwsim_send_ps_poll, data);
862 data->ps_poll_pending = true;
863 } else if (old_ps == PS_DISABLED && val != PS_DISABLED) {
864 ieee80211_iterate_active_interfaces(data->hw,
865 hwsim_send_nullfunc_ps,
866 data);
867 } else if (old_ps != PS_DISABLED && val == PS_DISABLED) {
868 ieee80211_iterate_active_interfaces(data->hw,
869 hwsim_send_nullfunc_no_ps,
870 data);
871 }
872
873 return 0;
874 }
875
876 DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_ps, hwsim_fops_ps_read, hwsim_fops_ps_write,
877 "%llu\n");
878
879
880 static int __init init_mac80211_hwsim(void)
881 {
882 int i, err = 0;
883 u8 addr[ETH_ALEN];
884 struct mac80211_hwsim_data *data;
885 struct ieee80211_hw *hw;
886 enum ieee80211_band band;
887
888 if (radios < 1 || radios > 100)
889 return -EINVAL;
890
891 spin_lock_init(&hwsim_radio_lock);
892 INIT_LIST_HEAD(&hwsim_radios);
893
894 hwsim_class = class_create(THIS_MODULE, "mac80211_hwsim");
895 if (IS_ERR(hwsim_class))
896 return PTR_ERR(hwsim_class);
897
898 memset(addr, 0, ETH_ALEN);
899 addr[0] = 0x02;
900
901 for (i = 0; i < radios; i++) {
902 printk(KERN_DEBUG "mac80211_hwsim: Initializing radio %d\n",
903 i);
904 hw = ieee80211_alloc_hw(sizeof(*data), &mac80211_hwsim_ops);
905 if (!hw) {
906 printk(KERN_DEBUG "mac80211_hwsim: ieee80211_alloc_hw "
907 "failed\n");
908 err = -ENOMEM;
909 goto failed;
910 }
911 data = hw->priv;
912 data->hw = hw;
913
914 data->dev = device_create(hwsim_class, NULL, 0, hw,
915 "hwsim%d", i);
916 if (IS_ERR(data->dev)) {
917 printk(KERN_DEBUG
918 "mac80211_hwsim: device_create "
919 "failed (%ld)\n", PTR_ERR(data->dev));
920 err = -ENOMEM;
921 goto failed_drvdata;
922 }
923 data->dev->driver = &mac80211_hwsim_driver;
924
925 SET_IEEE80211_DEV(hw, data->dev);
926 addr[3] = i >> 8;
927 addr[4] = i;
928 SET_IEEE80211_PERM_ADDR(hw, addr);
929
930 hw->channel_change_time = 1;
931 hw->queues = 4;
932 hw->wiphy->interface_modes =
933 BIT(NL80211_IFTYPE_STATION) |
934 BIT(NL80211_IFTYPE_AP) |
935 BIT(NL80211_IFTYPE_MESH_POINT);
936
937 hw->flags = IEEE80211_HW_MFP_CAPABLE;
938
939 /* ask mac80211 to reserve space for magic */
940 hw->vif_data_size = sizeof(struct hwsim_vif_priv);
941 hw->sta_data_size = sizeof(struct hwsim_sta_priv);
942
943 memcpy(data->channels_2ghz, hwsim_channels_2ghz,
944 sizeof(hwsim_channels_2ghz));
945 memcpy(data->channels_5ghz, hwsim_channels_5ghz,
946 sizeof(hwsim_channels_5ghz));
947 memcpy(data->rates, hwsim_rates, sizeof(hwsim_rates));
948
949 for (band = IEEE80211_BAND_2GHZ; band < IEEE80211_NUM_BANDS; band++) {
950 struct ieee80211_supported_band *sband = &data->bands[band];
951 switch (band) {
952 case IEEE80211_BAND_2GHZ:
953 sband->channels = data->channels_2ghz;
954 sband->n_channels =
955 ARRAY_SIZE(hwsim_channels_2ghz);
956 break;
957 case IEEE80211_BAND_5GHZ:
958 sband->channels = data->channels_5ghz;
959 sband->n_channels =
960 ARRAY_SIZE(hwsim_channels_5ghz);
961 break;
962 default:
963 break;
964 }
965
966 sband->bitrates = data->rates;
967 sband->n_bitrates = ARRAY_SIZE(hwsim_rates);
968
969 sband->ht_cap.ht_supported = true;
970 sband->ht_cap.cap = IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
971 IEEE80211_HT_CAP_GRN_FLD |
972 IEEE80211_HT_CAP_SGI_40 |
973 IEEE80211_HT_CAP_DSSSCCK40;
974 sband->ht_cap.ampdu_factor = 0x3;
975 sband->ht_cap.ampdu_density = 0x6;
976 memset(&sband->ht_cap.mcs, 0,
977 sizeof(sband->ht_cap.mcs));
978 sband->ht_cap.mcs.rx_mask[0] = 0xff;
979 sband->ht_cap.mcs.rx_mask[1] = 0xff;
980 sband->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
981
982 hw->wiphy->bands[band] = sband;
983 }
984
985 /* Work to be done prior to ieee80211_register_hw() */
986 switch (regtest) {
987 case HWSIM_REGTEST_DISABLED:
988 case HWSIM_REGTEST_DRIVER_REG_FOLLOW:
989 case HWSIM_REGTEST_DRIVER_REG_ALL:
990 case HWSIM_REGTEST_DIFF_COUNTRY:
991 /*
992 * Nothing to be done for driver regulatory domain
993 * hints prior to ieee80211_register_hw()
994 */
995 break;
996 case HWSIM_REGTEST_WORLD_ROAM:
997 if (i == 0) {
998 hw->wiphy->custom_regulatory = true;
999 wiphy_apply_custom_regulatory(hw->wiphy,
1000 &hwsim_world_regdom_custom_01);
1001 }
1002 break;
1003 case HWSIM_REGTEST_CUSTOM_WORLD:
1004 hw->wiphy->custom_regulatory = true;
1005 wiphy_apply_custom_regulatory(hw->wiphy,
1006 &hwsim_world_regdom_custom_01);
1007 break;
1008 case HWSIM_REGTEST_CUSTOM_WORLD_2:
1009 if (i == 0) {
1010 hw->wiphy->custom_regulatory = true;
1011 wiphy_apply_custom_regulatory(hw->wiphy,
1012 &hwsim_world_regdom_custom_01);
1013 } else if (i == 1) {
1014 hw->wiphy->custom_regulatory = true;
1015 wiphy_apply_custom_regulatory(hw->wiphy,
1016 &hwsim_world_regdom_custom_02);
1017 }
1018 break;
1019 case HWSIM_REGTEST_STRICT_ALL:
1020 hw->wiphy->strict_regulatory = true;
1021 break;
1022 case HWSIM_REGTEST_STRICT_FOLLOW:
1023 case HWSIM_REGTEST_STRICT_AND_DRIVER_REG:
1024 if (i == 0)
1025 hw->wiphy->strict_regulatory = true;
1026 break;
1027 case HWSIM_REGTEST_ALL:
1028 if (i == 0) {
1029 hw->wiphy->custom_regulatory = true;
1030 wiphy_apply_custom_regulatory(hw->wiphy,
1031 &hwsim_world_regdom_custom_01);
1032 } else if (i == 1) {
1033 hw->wiphy->custom_regulatory = true;
1034 wiphy_apply_custom_regulatory(hw->wiphy,
1035 &hwsim_world_regdom_custom_02);
1036 } else if (i == 4)
1037 hw->wiphy->strict_regulatory = true;
1038 break;
1039 default:
1040 break;
1041 }
1042
1043 /* give the regulatory workqueue a chance to run */
1044 if (regtest)
1045 schedule_timeout_interruptible(1);
1046 err = ieee80211_register_hw(hw);
1047 if (err < 0) {
1048 printk(KERN_DEBUG "mac80211_hwsim: "
1049 "ieee80211_register_hw failed (%d)\n", err);
1050 goto failed_hw;
1051 }
1052
1053 /* Work to be done after to ieee80211_register_hw() */
1054 switch (regtest) {
1055 case HWSIM_REGTEST_WORLD_ROAM:
1056 case HWSIM_REGTEST_DISABLED:
1057 break;
1058 case HWSIM_REGTEST_DRIVER_REG_FOLLOW:
1059 if (!i)
1060 regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
1061 break;
1062 case HWSIM_REGTEST_DRIVER_REG_ALL:
1063 case HWSIM_REGTEST_STRICT_ALL:
1064 regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
1065 break;
1066 case HWSIM_REGTEST_DIFF_COUNTRY:
1067 if (i < ARRAY_SIZE(hwsim_alpha2s))
1068 regulatory_hint(hw->wiphy, hwsim_alpha2s[i]);
1069 break;
1070 case HWSIM_REGTEST_CUSTOM_WORLD:
1071 case HWSIM_REGTEST_CUSTOM_WORLD_2:
1072 /*
1073 * Nothing to be done for custom world regulatory
1074 * domains after to ieee80211_register_hw
1075 */
1076 break;
1077 case HWSIM_REGTEST_STRICT_FOLLOW:
1078 if (i == 0)
1079 regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
1080 break;
1081 case HWSIM_REGTEST_STRICT_AND_DRIVER_REG:
1082 if (i == 0)
1083 regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
1084 else if (i == 1)
1085 regulatory_hint(hw->wiphy, hwsim_alpha2s[1]);
1086 break;
1087 case HWSIM_REGTEST_ALL:
1088 if (i == 2)
1089 regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
1090 else if (i == 3)
1091 regulatory_hint(hw->wiphy, hwsim_alpha2s[1]);
1092 else if (i == 4)
1093 regulatory_hint(hw->wiphy, hwsim_alpha2s[2]);
1094 break;
1095 default:
1096 break;
1097 }
1098
1099 printk(KERN_DEBUG "%s: hwaddr %pM registered\n",
1100 wiphy_name(hw->wiphy),
1101 hw->wiphy->perm_addr);
1102
1103 data->debugfs = debugfs_create_dir("hwsim",
1104 hw->wiphy->debugfsdir);
1105 data->debugfs_ps = debugfs_create_file("ps", 0666,
1106 data->debugfs, data,
1107 &hwsim_fops_ps);
1108
1109 setup_timer(&data->beacon_timer, mac80211_hwsim_beacon,
1110 (unsigned long) hw);
1111
1112 list_add_tail(&data->list, &hwsim_radios);
1113 }
1114
1115 hwsim_mon = alloc_netdev(0, "hwsim%d", hwsim_mon_setup);
1116 if (hwsim_mon == NULL)
1117 goto failed;
1118
1119 rtnl_lock();
1120
1121 err = dev_alloc_name(hwsim_mon, hwsim_mon->name);
1122 if (err < 0)
1123 goto failed_mon;
1124
1125
1126 err = register_netdevice(hwsim_mon);
1127 if (err < 0)
1128 goto failed_mon;
1129
1130 rtnl_unlock();
1131
1132 return 0;
1133
1134 failed_mon:
1135 rtnl_unlock();
1136 free_netdev(hwsim_mon);
1137 mac80211_hwsim_free();
1138 return err;
1139
1140 failed_hw:
1141 device_unregister(data->dev);
1142 failed_drvdata:
1143 ieee80211_free_hw(hw);
1144 failed:
1145 mac80211_hwsim_free();
1146 return err;
1147 }
1148
1149
1150 static void __exit exit_mac80211_hwsim(void)
1151 {
1152 printk(KERN_DEBUG "mac80211_hwsim: unregister radios\n");
1153
1154 unregister_netdev(hwsim_mon);
1155 mac80211_hwsim_free();
1156 }
1157
1158
1159 module_init(init_mac80211_hwsim);
1160 module_exit(exit_mac80211_hwsim);
Linux kernel - Deliverables
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