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mac80211_hwsim: Group radios
[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 * Only radios in the same group can communicate together (the
297 * channel has to match too). Each bit represents a group. A
298 * radio can be in more then one group.
299 */
300 u64 group;
301 struct dentry *debugfs_group;
302 };
303
304
305 struct hwsim_radiotap_hdr {
306 struct ieee80211_radiotap_header hdr;
307 u8 rt_flags;
308 u8 rt_rate;
309 __le16 rt_channel;
310 __le16 rt_chbitmask;
311 } __attribute__ ((packed));
312
313
314 static int hwsim_mon_xmit(struct sk_buff *skb, struct net_device *dev)
315 {
316 /* TODO: allow packet injection */
317 dev_kfree_skb(skb);
318 return 0;
319 }
320
321
322 static void mac80211_hwsim_monitor_rx(struct ieee80211_hw *hw,
323 struct sk_buff *tx_skb)
324 {
325 struct mac80211_hwsim_data *data = hw->priv;
326 struct sk_buff *skb;
327 struct hwsim_radiotap_hdr *hdr;
328 u16 flags;
329 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_skb);
330 struct ieee80211_rate *txrate = ieee80211_get_tx_rate(hw, info);
331
332 if (!netif_running(hwsim_mon))
333 return;
334
335 skb = skb_copy_expand(tx_skb, sizeof(*hdr), 0, GFP_ATOMIC);
336 if (skb == NULL)
337 return;
338
339 hdr = (struct hwsim_radiotap_hdr *) skb_push(skb, sizeof(*hdr));
340 hdr->hdr.it_version = PKTHDR_RADIOTAP_VERSION;
341 hdr->hdr.it_pad = 0;
342 hdr->hdr.it_len = cpu_to_le16(sizeof(*hdr));
343 hdr->hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
344 (1 << IEEE80211_RADIOTAP_RATE) |
345 (1 << IEEE80211_RADIOTAP_CHANNEL));
346 hdr->rt_flags = 0;
347 hdr->rt_rate = txrate->bitrate / 5;
348 hdr->rt_channel = cpu_to_le16(data->channel->center_freq);
349 flags = IEEE80211_CHAN_2GHZ;
350 if (txrate->flags & IEEE80211_RATE_ERP_G)
351 flags |= IEEE80211_CHAN_OFDM;
352 else
353 flags |= IEEE80211_CHAN_CCK;
354 hdr->rt_chbitmask = cpu_to_le16(flags);
355
356 skb->dev = hwsim_mon;
357 skb_set_mac_header(skb, 0);
358 skb->ip_summed = CHECKSUM_UNNECESSARY;
359 skb->pkt_type = PACKET_OTHERHOST;
360 skb->protocol = htons(ETH_P_802_2);
361 memset(skb->cb, 0, sizeof(skb->cb));
362 netif_rx(skb);
363 }
364
365
366 static bool hwsim_ps_rx_ok(struct mac80211_hwsim_data *data,
367 struct sk_buff *skb)
368 {
369 switch (data->ps) {
370 case PS_DISABLED:
371 return true;
372 case PS_ENABLED:
373 return false;
374 case PS_AUTO_POLL:
375 /* TODO: accept (some) Beacons by default and other frames only
376 * if pending PS-Poll has been sent */
377 return true;
378 case PS_MANUAL_POLL:
379 /* Allow unicast frames to own address if there is a pending
380 * PS-Poll */
381 if (data->ps_poll_pending &&
382 memcmp(data->hw->wiphy->perm_addr, skb->data + 4,
383 ETH_ALEN) == 0) {
384 data->ps_poll_pending = false;
385 return true;
386 }
387 return false;
388 }
389
390 return true;
391 }
392
393
394 static bool mac80211_hwsim_tx_frame(struct ieee80211_hw *hw,
395 struct sk_buff *skb)
396 {
397 struct mac80211_hwsim_data *data = hw->priv, *data2;
398 bool ack = false;
399 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
400 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
401 struct ieee80211_rx_status rx_status;
402
403 memset(&rx_status, 0, sizeof(rx_status));
404 /* TODO: set mactime */
405 rx_status.freq = data->channel->center_freq;
406 rx_status.band = data->channel->band;
407 rx_status.rate_idx = info->control.rates[0].idx;
408 /* TODO: simulate signal strength (and optional packet drop) */
409
410 if (data->ps != PS_DISABLED)
411 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
412
413 /* Copy skb to all enabled radios that are on the current frequency */
414 spin_lock(&hwsim_radio_lock);
415 list_for_each_entry(data2, &hwsim_radios, list) {
416 struct sk_buff *nskb;
417
418 if (data == data2)
419 continue;
420
421 if (!data2->started || !data2->radio_enabled ||
422 !hwsim_ps_rx_ok(data2, skb) ||
423 data->channel->center_freq != data2->channel->center_freq ||
424 !(data->group & data2->group))
425 continue;
426
427 nskb = skb_copy(skb, GFP_ATOMIC);
428 if (nskb == NULL)
429 continue;
430
431 if (memcmp(hdr->addr1, data2->hw->wiphy->perm_addr,
432 ETH_ALEN) == 0)
433 ack = true;
434 ieee80211_rx_irqsafe(data2->hw, nskb, &rx_status);
435 }
436 spin_unlock(&hwsim_radio_lock);
437
438 return ack;
439 }
440
441
442 static int mac80211_hwsim_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
443 {
444 struct mac80211_hwsim_data *data = hw->priv;
445 bool ack;
446 struct ieee80211_tx_info *txi;
447
448 mac80211_hwsim_monitor_rx(hw, skb);
449
450 if (skb->len < 10) {
451 /* Should not happen; just a sanity check for addr1 use */
452 dev_kfree_skb(skb);
453 return NETDEV_TX_OK;
454 }
455
456 if (!data->radio_enabled) {
457 printk(KERN_DEBUG "%s: dropped TX frame since radio "
458 "disabled\n", wiphy_name(hw->wiphy));
459 dev_kfree_skb(skb);
460 return NETDEV_TX_OK;
461 }
462
463 ack = mac80211_hwsim_tx_frame(hw, skb);
464
465 txi = IEEE80211_SKB_CB(skb);
466
467 if (txi->control.vif)
468 hwsim_check_magic(txi->control.vif);
469 if (txi->control.sta)
470 hwsim_check_sta_magic(txi->control.sta);
471
472 ieee80211_tx_info_clear_status(txi);
473 if (!(txi->flags & IEEE80211_TX_CTL_NO_ACK) && ack)
474 txi->flags |= IEEE80211_TX_STAT_ACK;
475 ieee80211_tx_status_irqsafe(hw, skb);
476 return NETDEV_TX_OK;
477 }
478
479
480 static int mac80211_hwsim_start(struct ieee80211_hw *hw)
481 {
482 struct mac80211_hwsim_data *data = hw->priv;
483 printk(KERN_DEBUG "%s:%s\n", wiphy_name(hw->wiphy), __func__);
484 data->started = 1;
485 return 0;
486 }
487
488
489 static void mac80211_hwsim_stop(struct ieee80211_hw *hw)
490 {
491 struct mac80211_hwsim_data *data = hw->priv;
492 data->started = 0;
493 del_timer(&data->beacon_timer);
494 printk(KERN_DEBUG "%s:%s\n", wiphy_name(hw->wiphy), __func__);
495 }
496
497
498 static int mac80211_hwsim_add_interface(struct ieee80211_hw *hw,
499 struct ieee80211_if_init_conf *conf)
500 {
501 printk(KERN_DEBUG "%s:%s (type=%d mac_addr=%pM)\n",
502 wiphy_name(hw->wiphy), __func__, conf->type,
503 conf->mac_addr);
504 hwsim_set_magic(conf->vif);
505 return 0;
506 }
507
508
509 static void mac80211_hwsim_remove_interface(
510 struct ieee80211_hw *hw, struct ieee80211_if_init_conf *conf)
511 {
512 printk(KERN_DEBUG "%s:%s (type=%d mac_addr=%pM)\n",
513 wiphy_name(hw->wiphy), __func__, conf->type,
514 conf->mac_addr);
515 hwsim_check_magic(conf->vif);
516 hwsim_clear_magic(conf->vif);
517 }
518
519
520 static void mac80211_hwsim_beacon_tx(void *arg, u8 *mac,
521 struct ieee80211_vif *vif)
522 {
523 struct ieee80211_hw *hw = arg;
524 struct sk_buff *skb;
525 struct ieee80211_tx_info *info;
526
527 hwsim_check_magic(vif);
528
529 if (vif->type != NL80211_IFTYPE_AP &&
530 vif->type != NL80211_IFTYPE_MESH_POINT)
531 return;
532
533 skb = ieee80211_beacon_get(hw, vif);
534 if (skb == NULL)
535 return;
536 info = IEEE80211_SKB_CB(skb);
537
538 mac80211_hwsim_monitor_rx(hw, skb);
539 mac80211_hwsim_tx_frame(hw, skb);
540 dev_kfree_skb(skb);
541 }
542
543
544 static void mac80211_hwsim_beacon(unsigned long arg)
545 {
546 struct ieee80211_hw *hw = (struct ieee80211_hw *) arg;
547 struct mac80211_hwsim_data *data = hw->priv;
548
549 if (!data->started || !data->radio_enabled)
550 return;
551
552 ieee80211_iterate_active_interfaces_atomic(
553 hw, mac80211_hwsim_beacon_tx, hw);
554
555 data->beacon_timer.expires = jiffies + data->beacon_int;
556 add_timer(&data->beacon_timer);
557 }
558
559
560 static int mac80211_hwsim_config(struct ieee80211_hw *hw, u32 changed)
561 {
562 struct mac80211_hwsim_data *data = hw->priv;
563 struct ieee80211_conf *conf = &hw->conf;
564
565 printk(KERN_DEBUG "%s:%s (freq=%d radio_enabled=%d idle=%d ps=%d)\n",
566 wiphy_name(hw->wiphy), __func__,
567 conf->channel->center_freq, conf->radio_enabled,
568 !!(conf->flags & IEEE80211_CONF_IDLE),
569 !!(conf->flags & IEEE80211_CONF_PS));
570
571 data->channel = conf->channel;
572 data->radio_enabled = conf->radio_enabled;
573 if (!data->started || !data->radio_enabled || !data->beacon_int)
574 del_timer(&data->beacon_timer);
575 else
576 mod_timer(&data->beacon_timer, jiffies + data->beacon_int);
577
578 return 0;
579 }
580
581
582 static void mac80211_hwsim_configure_filter(struct ieee80211_hw *hw,
583 unsigned int changed_flags,
584 unsigned int *total_flags,
585 int mc_count,
586 struct dev_addr_list *mc_list)
587 {
588 struct mac80211_hwsim_data *data = hw->priv;
589
590 printk(KERN_DEBUG "%s:%s\n", wiphy_name(hw->wiphy), __func__);
591
592 data->rx_filter = 0;
593 if (*total_flags & FIF_PROMISC_IN_BSS)
594 data->rx_filter |= FIF_PROMISC_IN_BSS;
595 if (*total_flags & FIF_ALLMULTI)
596 data->rx_filter |= FIF_ALLMULTI;
597
598 *total_flags = data->rx_filter;
599 }
600
601 static void mac80211_hwsim_bss_info_changed(struct ieee80211_hw *hw,
602 struct ieee80211_vif *vif,
603 struct ieee80211_bss_conf *info,
604 u32 changed)
605 {
606 struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
607 struct mac80211_hwsim_data *data = hw->priv;
608
609 hwsim_check_magic(vif);
610
611 printk(KERN_DEBUG "%s:%s(changed=0x%x)\n",
612 wiphy_name(hw->wiphy), __func__, changed);
613
614 if (changed & BSS_CHANGED_BSSID) {
615 printk(KERN_DEBUG "%s:%s: BSSID changed: %pM\n",
616 wiphy_name(hw->wiphy), __func__,
617 info->bssid);
618 memcpy(vp->bssid, info->bssid, ETH_ALEN);
619 }
620
621 if (changed & BSS_CHANGED_ASSOC) {
622 printk(KERN_DEBUG " %s: ASSOC: assoc=%d aid=%d\n",
623 wiphy_name(hw->wiphy), info->assoc, info->aid);
624 vp->assoc = info->assoc;
625 vp->aid = info->aid;
626 }
627
628 if (changed & BSS_CHANGED_BEACON_INT) {
629 printk(KERN_DEBUG " %s: BCNINT: %d\n",
630 wiphy_name(hw->wiphy), info->beacon_int);
631 data->beacon_int = 1024 * info->beacon_int / 1000 * HZ / 1000;
632 if (WARN_ON(!data->beacon_int))
633 data->beacon_int = 1;
634 }
635
636 if (changed & BSS_CHANGED_ERP_CTS_PROT) {
637 printk(KERN_DEBUG " %s: ERP_CTS_PROT: %d\n",
638 wiphy_name(hw->wiphy), info->use_cts_prot);
639 }
640
641 if (changed & BSS_CHANGED_ERP_PREAMBLE) {
642 printk(KERN_DEBUG " %s: ERP_PREAMBLE: %d\n",
643 wiphy_name(hw->wiphy), info->use_short_preamble);
644 }
645
646 if (changed & BSS_CHANGED_ERP_SLOT) {
647 printk(KERN_DEBUG " %s: ERP_SLOT: %d\n",
648 wiphy_name(hw->wiphy), info->use_short_slot);
649 }
650
651 if (changed & BSS_CHANGED_HT) {
652 printk(KERN_DEBUG " %s: HT: op_mode=0x%x\n",
653 wiphy_name(hw->wiphy),
654 info->ht_operation_mode);
655 }
656
657 if (changed & BSS_CHANGED_BASIC_RATES) {
658 printk(KERN_DEBUG " %s: BASIC_RATES: 0x%llx\n",
659 wiphy_name(hw->wiphy),
660 (unsigned long long) info->basic_rates);
661 }
662 }
663
664 static void mac80211_hwsim_sta_notify(struct ieee80211_hw *hw,
665 struct ieee80211_vif *vif,
666 enum sta_notify_cmd cmd,
667 struct ieee80211_sta *sta)
668 {
669 hwsim_check_magic(vif);
670 switch (cmd) {
671 case STA_NOTIFY_ADD:
672 hwsim_set_sta_magic(sta);
673 break;
674 case STA_NOTIFY_REMOVE:
675 hwsim_clear_sta_magic(sta);
676 break;
677 case STA_NOTIFY_SLEEP:
678 case STA_NOTIFY_AWAKE:
679 /* TODO: make good use of these flags */
680 break;
681 }
682 }
683
684 static int mac80211_hwsim_set_tim(struct ieee80211_hw *hw,
685 struct ieee80211_sta *sta,
686 bool set)
687 {
688 hwsim_check_sta_magic(sta);
689 return 0;
690 }
691
692 static int mac80211_hwsim_conf_tx(
693 struct ieee80211_hw *hw, u16 queue,
694 const struct ieee80211_tx_queue_params *params)
695 {
696 printk(KERN_DEBUG "%s:%s (queue=%d txop=%d cw_min=%d cw_max=%d "
697 "aifs=%d)\n",
698 wiphy_name(hw->wiphy), __func__, queue,
699 params->txop, params->cw_min, params->cw_max, params->aifs);
700 return 0;
701 }
702
703 static const struct ieee80211_ops mac80211_hwsim_ops =
704 {
705 .tx = mac80211_hwsim_tx,
706 .start = mac80211_hwsim_start,
707 .stop = mac80211_hwsim_stop,
708 .add_interface = mac80211_hwsim_add_interface,
709 .remove_interface = mac80211_hwsim_remove_interface,
710 .config = mac80211_hwsim_config,
711 .configure_filter = mac80211_hwsim_configure_filter,
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_group);
733 debugfs_remove(data->debugfs_ps);
734 debugfs_remove(data->debugfs);
735 ieee80211_unregister_hw(data->hw);
736 device_unregister(data->dev);
737 ieee80211_free_hw(data->hw);
738 }
739 class_destroy(hwsim_class);
740 }
741
742
743 static struct device_driver mac80211_hwsim_driver = {
744 .name = "mac80211_hwsim"
745 };
746
747 static const struct net_device_ops hwsim_netdev_ops = {
748 .ndo_start_xmit = hwsim_mon_xmit,
749 .ndo_change_mtu = eth_change_mtu,
750 .ndo_set_mac_address = eth_mac_addr,
751 .ndo_validate_addr = eth_validate_addr,
752 };
753
754 static void hwsim_mon_setup(struct net_device *dev)
755 {
756 dev->netdev_ops = &hwsim_netdev_ops;
757 dev->destructor = free_netdev;
758 ether_setup(dev);
759 dev->tx_queue_len = 0;
760 dev->type = ARPHRD_IEEE80211_RADIOTAP;
761 memset(dev->dev_addr, 0, ETH_ALEN);
762 dev->dev_addr[0] = 0x12;
763 }
764
765
766 static void hwsim_send_ps_poll(void *dat, u8 *mac, struct ieee80211_vif *vif)
767 {
768 struct mac80211_hwsim_data *data = dat;
769 struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
770 DECLARE_MAC_BUF(buf);
771 struct sk_buff *skb;
772 struct ieee80211_pspoll *pspoll;
773
774 if (!vp->assoc)
775 return;
776
777 printk(KERN_DEBUG "%s:%s: send PS-Poll to %pM for aid %d\n",
778 wiphy_name(data->hw->wiphy), __func__, vp->bssid, vp->aid);
779
780 skb = dev_alloc_skb(sizeof(*pspoll));
781 if (!skb)
782 return;
783 pspoll = (void *) skb_put(skb, sizeof(*pspoll));
784 pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
785 IEEE80211_STYPE_PSPOLL |
786 IEEE80211_FCTL_PM);
787 pspoll->aid = cpu_to_le16(0xc000 | vp->aid);
788 memcpy(pspoll->bssid, vp->bssid, ETH_ALEN);
789 memcpy(pspoll->ta, mac, ETH_ALEN);
790 if (data->radio_enabled &&
791 !mac80211_hwsim_tx_frame(data->hw, skb))
792 printk(KERN_DEBUG "%s: PS-Poll frame not ack'ed\n", __func__);
793 dev_kfree_skb(skb);
794 }
795
796
797 static void hwsim_send_nullfunc(struct mac80211_hwsim_data *data, u8 *mac,
798 struct ieee80211_vif *vif, int ps)
799 {
800 struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
801 DECLARE_MAC_BUF(buf);
802 struct sk_buff *skb;
803 struct ieee80211_hdr *hdr;
804
805 if (!vp->assoc)
806 return;
807
808 printk(KERN_DEBUG "%s:%s: send data::nullfunc to %pM ps=%d\n",
809 wiphy_name(data->hw->wiphy), __func__, vp->bssid, ps);
810
811 skb = dev_alloc_skb(sizeof(*hdr));
812 if (!skb)
813 return;
814 hdr = (void *) skb_put(skb, sizeof(*hdr) - ETH_ALEN);
815 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
816 IEEE80211_STYPE_NULLFUNC |
817 (ps ? IEEE80211_FCTL_PM : 0));
818 hdr->duration_id = cpu_to_le16(0);
819 memcpy(hdr->addr1, vp->bssid, ETH_ALEN);
820 memcpy(hdr->addr2, mac, ETH_ALEN);
821 memcpy(hdr->addr3, vp->bssid, ETH_ALEN);
822 if (data->radio_enabled &&
823 !mac80211_hwsim_tx_frame(data->hw, skb))
824 printk(KERN_DEBUG "%s: nullfunc frame not ack'ed\n", __func__);
825 dev_kfree_skb(skb);
826 }
827
828
829 static void hwsim_send_nullfunc_ps(void *dat, u8 *mac,
830 struct ieee80211_vif *vif)
831 {
832 struct mac80211_hwsim_data *data = dat;
833 hwsim_send_nullfunc(data, mac, vif, 1);
834 }
835
836
837 static void hwsim_send_nullfunc_no_ps(void *dat, u8 *mac,
838 struct ieee80211_vif *vif)
839 {
840 struct mac80211_hwsim_data *data = dat;
841 hwsim_send_nullfunc(data, mac, vif, 0);
842 }
843
844
845 static int hwsim_fops_ps_read(void *dat, u64 *val)
846 {
847 struct mac80211_hwsim_data *data = dat;
848 *val = data->ps;
849 return 0;
850 }
851
852 static int hwsim_fops_ps_write(void *dat, u64 val)
853 {
854 struct mac80211_hwsim_data *data = dat;
855 enum ps_mode old_ps;
856
857 if (val != PS_DISABLED && val != PS_ENABLED && val != PS_AUTO_POLL &&
858 val != PS_MANUAL_POLL)
859 return -EINVAL;
860
861 old_ps = data->ps;
862 data->ps = val;
863
864 if (val == PS_MANUAL_POLL) {
865 ieee80211_iterate_active_interfaces(data->hw,
866 hwsim_send_ps_poll, data);
867 data->ps_poll_pending = true;
868 } else if (old_ps == PS_DISABLED && val != PS_DISABLED) {
869 ieee80211_iterate_active_interfaces(data->hw,
870 hwsim_send_nullfunc_ps,
871 data);
872 } else if (old_ps != PS_DISABLED && val == PS_DISABLED) {
873 ieee80211_iterate_active_interfaces(data->hw,
874 hwsim_send_nullfunc_no_ps,
875 data);
876 }
877
878 return 0;
879 }
880
881 DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_ps, hwsim_fops_ps_read, hwsim_fops_ps_write,
882 "%llu\n");
883
884
885 static int hwsim_fops_group_read(void *dat, u64 *val)
886 {
887 struct mac80211_hwsim_data *data = dat;
888 *val = data->group;
889 return 0;
890 }
891
892 static int hwsim_fops_group_write(void *dat, u64 val)
893 {
894 struct mac80211_hwsim_data *data = dat;
895 data->group = val;
896 return 0;
897 }
898
899 DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_group,
900 hwsim_fops_group_read, hwsim_fops_group_write,
901 "%llx\n");
902
903 static int __init init_mac80211_hwsim(void)
904 {
905 int i, err = 0;
906 u8 addr[ETH_ALEN];
907 struct mac80211_hwsim_data *data;
908 struct ieee80211_hw *hw;
909 enum ieee80211_band band;
910
911 if (radios < 1 || radios > 100)
912 return -EINVAL;
913
914 spin_lock_init(&hwsim_radio_lock);
915 INIT_LIST_HEAD(&hwsim_radios);
916
917 hwsim_class = class_create(THIS_MODULE, "mac80211_hwsim");
918 if (IS_ERR(hwsim_class))
919 return PTR_ERR(hwsim_class);
920
921 memset(addr, 0, ETH_ALEN);
922 addr[0] = 0x02;
923
924 for (i = 0; i < radios; i++) {
925 printk(KERN_DEBUG "mac80211_hwsim: Initializing radio %d\n",
926 i);
927 hw = ieee80211_alloc_hw(sizeof(*data), &mac80211_hwsim_ops);
928 if (!hw) {
929 printk(KERN_DEBUG "mac80211_hwsim: ieee80211_alloc_hw "
930 "failed\n");
931 err = -ENOMEM;
932 goto failed;
933 }
934 data = hw->priv;
935 data->hw = hw;
936
937 data->dev = device_create(hwsim_class, NULL, 0, hw,
938 "hwsim%d", i);
939 if (IS_ERR(data->dev)) {
940 printk(KERN_DEBUG
941 "mac80211_hwsim: device_create "
942 "failed (%ld)\n", PTR_ERR(data->dev));
943 err = -ENOMEM;
944 goto failed_drvdata;
945 }
946 data->dev->driver = &mac80211_hwsim_driver;
947
948 SET_IEEE80211_DEV(hw, data->dev);
949 addr[3] = i >> 8;
950 addr[4] = i;
951 SET_IEEE80211_PERM_ADDR(hw, addr);
952
953 hw->channel_change_time = 1;
954 hw->queues = 4;
955 hw->wiphy->interface_modes =
956 BIT(NL80211_IFTYPE_STATION) |
957 BIT(NL80211_IFTYPE_AP) |
958 BIT(NL80211_IFTYPE_MESH_POINT);
959
960 hw->flags = IEEE80211_HW_MFP_CAPABLE;
961
962 /* ask mac80211 to reserve space for magic */
963 hw->vif_data_size = sizeof(struct hwsim_vif_priv);
964 hw->sta_data_size = sizeof(struct hwsim_sta_priv);
965
966 memcpy(data->channels_2ghz, hwsim_channels_2ghz,
967 sizeof(hwsim_channels_2ghz));
968 memcpy(data->channels_5ghz, hwsim_channels_5ghz,
969 sizeof(hwsim_channels_5ghz));
970 memcpy(data->rates, hwsim_rates, sizeof(hwsim_rates));
971
972 for (band = IEEE80211_BAND_2GHZ; band < IEEE80211_NUM_BANDS; band++) {
973 struct ieee80211_supported_band *sband = &data->bands[band];
974 switch (band) {
975 case IEEE80211_BAND_2GHZ:
976 sband->channels = data->channels_2ghz;
977 sband->n_channels =
978 ARRAY_SIZE(hwsim_channels_2ghz);
979 break;
980 case IEEE80211_BAND_5GHZ:
981 sband->channels = data->channels_5ghz;
982 sband->n_channels =
983 ARRAY_SIZE(hwsim_channels_5ghz);
984 break;
985 default:
986 break;
987 }
988
989 sband->bitrates = data->rates;
990 sband->n_bitrates = ARRAY_SIZE(hwsim_rates);
991
992 sband->ht_cap.ht_supported = true;
993 sband->ht_cap.cap = IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
994 IEEE80211_HT_CAP_GRN_FLD |
995 IEEE80211_HT_CAP_SGI_40 |
996 IEEE80211_HT_CAP_DSSSCCK40;
997 sband->ht_cap.ampdu_factor = 0x3;
998 sband->ht_cap.ampdu_density = 0x6;
999 memset(&sband->ht_cap.mcs, 0,
1000 sizeof(sband->ht_cap.mcs));
1001 sband->ht_cap.mcs.rx_mask[0] = 0xff;
1002 sband->ht_cap.mcs.rx_mask[1] = 0xff;
1003 sband->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
1004
1005 hw->wiphy->bands[band] = sband;
1006 }
1007 /* By default all radios are belonging to the first group */
1008 data->group = 1;
1009
1010 /* Work to be done prior to ieee80211_register_hw() */
1011 switch (regtest) {
1012 case HWSIM_REGTEST_DISABLED:
1013 case HWSIM_REGTEST_DRIVER_REG_FOLLOW:
1014 case HWSIM_REGTEST_DRIVER_REG_ALL:
1015 case HWSIM_REGTEST_DIFF_COUNTRY:
1016 /*
1017 * Nothing to be done for driver regulatory domain
1018 * hints prior to ieee80211_register_hw()
1019 */
1020 break;
1021 case HWSIM_REGTEST_WORLD_ROAM:
1022 if (i == 0) {
1023 hw->wiphy->custom_regulatory = true;
1024 wiphy_apply_custom_regulatory(hw->wiphy,
1025 &hwsim_world_regdom_custom_01);
1026 }
1027 break;
1028 case HWSIM_REGTEST_CUSTOM_WORLD:
1029 hw->wiphy->custom_regulatory = true;
1030 wiphy_apply_custom_regulatory(hw->wiphy,
1031 &hwsim_world_regdom_custom_01);
1032 break;
1033 case HWSIM_REGTEST_CUSTOM_WORLD_2:
1034 if (i == 0) {
1035 hw->wiphy->custom_regulatory = true;
1036 wiphy_apply_custom_regulatory(hw->wiphy,
1037 &hwsim_world_regdom_custom_01);
1038 } else if (i == 1) {
1039 hw->wiphy->custom_regulatory = true;
1040 wiphy_apply_custom_regulatory(hw->wiphy,
1041 &hwsim_world_regdom_custom_02);
1042 }
1043 break;
1044 case HWSIM_REGTEST_STRICT_ALL:
1045 hw->wiphy->strict_regulatory = true;
1046 break;
1047 case HWSIM_REGTEST_STRICT_FOLLOW:
1048 case HWSIM_REGTEST_STRICT_AND_DRIVER_REG:
1049 if (i == 0)
1050 hw->wiphy->strict_regulatory = true;
1051 break;
1052 case HWSIM_REGTEST_ALL:
1053 if (i == 0) {
1054 hw->wiphy->custom_regulatory = true;
1055 wiphy_apply_custom_regulatory(hw->wiphy,
1056 &hwsim_world_regdom_custom_01);
1057 } else if (i == 1) {
1058 hw->wiphy->custom_regulatory = true;
1059 wiphy_apply_custom_regulatory(hw->wiphy,
1060 &hwsim_world_regdom_custom_02);
1061 } else if (i == 4)
1062 hw->wiphy->strict_regulatory = true;
1063 break;
1064 default:
1065 break;
1066 }
1067
1068 /* give the regulatory workqueue a chance to run */
1069 if (regtest)
1070 schedule_timeout_interruptible(1);
1071 err = ieee80211_register_hw(hw);
1072 if (err < 0) {
1073 printk(KERN_DEBUG "mac80211_hwsim: "
1074 "ieee80211_register_hw failed (%d)\n", err);
1075 goto failed_hw;
1076 }
1077
1078 /* Work to be done after to ieee80211_register_hw() */
1079 switch (regtest) {
1080 case HWSIM_REGTEST_WORLD_ROAM:
1081 case HWSIM_REGTEST_DISABLED:
1082 break;
1083 case HWSIM_REGTEST_DRIVER_REG_FOLLOW:
1084 if (!i)
1085 regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
1086 break;
1087 case HWSIM_REGTEST_DRIVER_REG_ALL:
1088 case HWSIM_REGTEST_STRICT_ALL:
1089 regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
1090 break;
1091 case HWSIM_REGTEST_DIFF_COUNTRY:
1092 if (i < ARRAY_SIZE(hwsim_alpha2s))
1093 regulatory_hint(hw->wiphy, hwsim_alpha2s[i]);
1094 break;
1095 case HWSIM_REGTEST_CUSTOM_WORLD:
1096 case HWSIM_REGTEST_CUSTOM_WORLD_2:
1097 /*
1098 * Nothing to be done for custom world regulatory
1099 * domains after to ieee80211_register_hw
1100 */
1101 break;
1102 case HWSIM_REGTEST_STRICT_FOLLOW:
1103 if (i == 0)
1104 regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
1105 break;
1106 case HWSIM_REGTEST_STRICT_AND_DRIVER_REG:
1107 if (i == 0)
1108 regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
1109 else if (i == 1)
1110 regulatory_hint(hw->wiphy, hwsim_alpha2s[1]);
1111 break;
1112 case HWSIM_REGTEST_ALL:
1113 if (i == 2)
1114 regulatory_hint(hw->wiphy, hwsim_alpha2s[0]);
1115 else if (i == 3)
1116 regulatory_hint(hw->wiphy, hwsim_alpha2s[1]);
1117 else if (i == 4)
1118 regulatory_hint(hw->wiphy, hwsim_alpha2s[2]);
1119 break;
1120 default:
1121 break;
1122 }
1123
1124 printk(KERN_DEBUG "%s: hwaddr %pM registered\n",
1125 wiphy_name(hw->wiphy),
1126 hw->wiphy->perm_addr);
1127
1128 data->debugfs = debugfs_create_dir("hwsim",
1129 hw->wiphy->debugfsdir);
1130 data->debugfs_ps = debugfs_create_file("ps", 0666,
1131 data->debugfs, data,
1132 &hwsim_fops_ps);
1133 data->debugfs_group = debugfs_create_file("group", 0666,
1134 data->debugfs, data,
1135 &hwsim_fops_group);
1136
1137 setup_timer(&data->beacon_timer, mac80211_hwsim_beacon,
1138 (unsigned long) hw);
1139
1140 list_add_tail(&data->list, &hwsim_radios);
1141 }
1142
1143 hwsim_mon = alloc_netdev(0, "hwsim%d", hwsim_mon_setup);
1144 if (hwsim_mon == NULL)
1145 goto failed;
1146
1147 rtnl_lock();
1148
1149 err = dev_alloc_name(hwsim_mon, hwsim_mon->name);
1150 if (err < 0)
1151 goto failed_mon;
1152
1153
1154 err = register_netdevice(hwsim_mon);
1155 if (err < 0)
1156 goto failed_mon;
1157
1158 rtnl_unlock();
1159
1160 return 0;
1161
1162 failed_mon:
1163 rtnl_unlock();
1164 free_netdev(hwsim_mon);
1165 mac80211_hwsim_free();
1166 return err;
1167
1168 failed_hw:
1169 device_unregister(data->dev);
1170 failed_drvdata:
1171 ieee80211_free_hw(hw);
1172 failed:
1173 mac80211_hwsim_free();
1174 return err;
1175 }
1176
1177
1178 static void __exit exit_mac80211_hwsim(void)
1179 {
1180 printk(KERN_DEBUG "mac80211_hwsim: unregister radios\n");
1181
1182 unregister_netdev(hwsim_mon);
1183 mac80211_hwsim_free();
1184 }
1185
1186
1187 module_init(init_mac80211_hwsim);
1188 module_exit(exit_mac80211_hwsim);
Linux kernel - Deliverables
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