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Merge branch 'bkl-removal' of git://git.lwn.net/linux-2.6
[linux-2.6-omap-h63xx.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  * - IEEE 802.11a and 802.11n modes
14  * - RX filtering based on filter configuration (data->rx_filter)
15  */
16
17 #include <linux/list.h>
18 #include <linux/spinlock.h>
19 #include <net/mac80211.h>
20 #include <net/ieee80211_radiotap.h>
21 #include <linux/if_arp.h>
22 #include <linux/rtnetlink.h>
23 #include <linux/etherdevice.h>
24 #include <linux/debugfs.h>
25
26 MODULE_AUTHOR("Jouni Malinen");
27 MODULE_DESCRIPTION("Software simulator of 802.11 radio(s) for mac80211");
28 MODULE_LICENSE("GPL");
29
30 static int radios = 2;
31 module_param(radios, int, 0444);
32 MODULE_PARM_DESC(radios, "Number of simulated radios");
33
34 struct hwsim_vif_priv {
35         u32 magic;
36         u8 bssid[ETH_ALEN];
37         bool assoc;
38         u16 aid;
39 };
40
41 #define HWSIM_VIF_MAGIC 0x69537748
42
43 static inline void hwsim_check_magic(struct ieee80211_vif *vif)
44 {
45         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
46         WARN_ON(vp->magic != HWSIM_VIF_MAGIC);
47 }
48
49 static inline void hwsim_set_magic(struct ieee80211_vif *vif)
50 {
51         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
52         vp->magic = HWSIM_VIF_MAGIC;
53 }
54
55 static inline void hwsim_clear_magic(struct ieee80211_vif *vif)
56 {
57         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
58         vp->magic = 0;
59 }
60
61 struct hwsim_sta_priv {
62         u32 magic;
63 };
64
65 #define HWSIM_STA_MAGIC 0x6d537748
66
67 static inline void hwsim_check_sta_magic(struct ieee80211_sta *sta)
68 {
69         struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
70         WARN_ON(sp->magic != HWSIM_STA_MAGIC);
71 }
72
73 static inline void hwsim_set_sta_magic(struct ieee80211_sta *sta)
74 {
75         struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
76         sp->magic = HWSIM_STA_MAGIC;
77 }
78
79 static inline void hwsim_clear_sta_magic(struct ieee80211_sta *sta)
80 {
81         struct hwsim_sta_priv *sp = (void *)sta->drv_priv;
82         sp->magic = 0;
83 }
84
85 static struct class *hwsim_class;
86
87 static struct net_device *hwsim_mon; /* global monitor netdev */
88
89
90 static const struct ieee80211_channel hwsim_channels[] = {
91         { .center_freq = 2412 },
92         { .center_freq = 2417 },
93         { .center_freq = 2422 },
94         { .center_freq = 2427 },
95         { .center_freq = 2432 },
96         { .center_freq = 2437 },
97         { .center_freq = 2442 },
98         { .center_freq = 2447 },
99         { .center_freq = 2452 },
100         { .center_freq = 2457 },
101         { .center_freq = 2462 },
102         { .center_freq = 2467 },
103         { .center_freq = 2472 },
104         { .center_freq = 2484 },
105 };
106
107 static const struct ieee80211_rate hwsim_rates[] = {
108         { .bitrate = 10 },
109         { .bitrate = 20, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
110         { .bitrate = 55, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
111         { .bitrate = 110, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
112         { .bitrate = 60 },
113         { .bitrate = 90 },
114         { .bitrate = 120 },
115         { .bitrate = 180 },
116         { .bitrate = 240 },
117         { .bitrate = 360 },
118         { .bitrate = 480 },
119         { .bitrate = 540 }
120 };
121
122 static spinlock_t hwsim_radio_lock;
123 static struct list_head hwsim_radios;
124
125 struct mac80211_hwsim_data {
126         struct list_head list;
127         struct ieee80211_hw *hw;
128         struct device *dev;
129         struct ieee80211_supported_band band;
130         struct ieee80211_channel channels[ARRAY_SIZE(hwsim_channels)];
131         struct ieee80211_rate rates[ARRAY_SIZE(hwsim_rates)];
132
133         struct ieee80211_channel *channel;
134         int radio_enabled;
135         unsigned long beacon_int; /* in jiffies unit */
136         unsigned int rx_filter;
137         int started;
138         struct timer_list beacon_timer;
139         enum ps_mode {
140                 PS_DISABLED, PS_ENABLED, PS_AUTO_POLL, PS_MANUAL_POLL
141         } ps;
142         bool ps_poll_pending;
143         struct dentry *debugfs;
144         struct dentry *debugfs_ps;
145 };
146
147
148 struct hwsim_radiotap_hdr {
149         struct ieee80211_radiotap_header hdr;
150         u8 rt_flags;
151         u8 rt_rate;
152         __le16 rt_channel;
153         __le16 rt_chbitmask;
154 } __attribute__ ((packed));
155
156
157 static int hwsim_mon_xmit(struct sk_buff *skb, struct net_device *dev)
158 {
159         /* TODO: allow packet injection */
160         dev_kfree_skb(skb);
161         return 0;
162 }
163
164
165 static void mac80211_hwsim_monitor_rx(struct ieee80211_hw *hw,
166                                       struct sk_buff *tx_skb)
167 {
168         struct mac80211_hwsim_data *data = hw->priv;
169         struct sk_buff *skb;
170         struct hwsim_radiotap_hdr *hdr;
171         u16 flags;
172         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_skb);
173         struct ieee80211_rate *txrate = ieee80211_get_tx_rate(hw, info);
174
175         if (!netif_running(hwsim_mon))
176                 return;
177
178         skb = skb_copy_expand(tx_skb, sizeof(*hdr), 0, GFP_ATOMIC);
179         if (skb == NULL)
180                 return;
181
182         hdr = (struct hwsim_radiotap_hdr *) skb_push(skb, sizeof(*hdr));
183         hdr->hdr.it_version = PKTHDR_RADIOTAP_VERSION;
184         hdr->hdr.it_pad = 0;
185         hdr->hdr.it_len = cpu_to_le16(sizeof(*hdr));
186         hdr->hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) |
187                                           (1 << IEEE80211_RADIOTAP_RATE) |
188                                           (1 << IEEE80211_RADIOTAP_CHANNEL));
189         hdr->rt_flags = 0;
190         hdr->rt_rate = txrate->bitrate / 5;
191         hdr->rt_channel = cpu_to_le16(data->channel->center_freq);
192         flags = IEEE80211_CHAN_2GHZ;
193         if (txrate->flags & IEEE80211_RATE_ERP_G)
194                 flags |= IEEE80211_CHAN_OFDM;
195         else
196                 flags |= IEEE80211_CHAN_CCK;
197         hdr->rt_chbitmask = cpu_to_le16(flags);
198
199         skb->dev = hwsim_mon;
200         skb_set_mac_header(skb, 0);
201         skb->ip_summed = CHECKSUM_UNNECESSARY;
202         skb->pkt_type = PACKET_OTHERHOST;
203         skb->protocol = htons(ETH_P_802_2);
204         memset(skb->cb, 0, sizeof(skb->cb));
205         netif_rx(skb);
206 }
207
208
209 static bool hwsim_ps_rx_ok(struct mac80211_hwsim_data *data,
210                            struct sk_buff *skb)
211 {
212         switch (data->ps) {
213         case PS_DISABLED:
214                 return true;
215         case PS_ENABLED:
216                 return false;
217         case PS_AUTO_POLL:
218                 /* TODO: accept (some) Beacons by default and other frames only
219                  * if pending PS-Poll has been sent */
220                 return true;
221         case PS_MANUAL_POLL:
222                 /* Allow unicast frames to own address if there is a pending
223                  * PS-Poll */
224                 if (data->ps_poll_pending &&
225                     memcmp(data->hw->wiphy->perm_addr, skb->data + 4,
226                            ETH_ALEN) == 0) {
227                         data->ps_poll_pending = false;
228                         return true;
229                 }
230                 return false;
231         }
232
233         return true;
234 }
235
236
237 static bool mac80211_hwsim_tx_frame(struct ieee80211_hw *hw,
238                                     struct sk_buff *skb)
239 {
240         struct mac80211_hwsim_data *data = hw->priv, *data2;
241         bool ack = false;
242         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
243         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
244         struct ieee80211_rx_status rx_status;
245
246         memset(&rx_status, 0, sizeof(rx_status));
247         /* TODO: set mactime */
248         rx_status.freq = data->channel->center_freq;
249         rx_status.band = data->channel->band;
250         rx_status.rate_idx = info->control.rates[0].idx;
251         /* TODO: simulate signal strength (and optional packet drop) */
252
253         if (data->ps != PS_DISABLED)
254                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
255
256         /* Copy skb to all enabled radios that are on the current frequency */
257         spin_lock(&hwsim_radio_lock);
258         list_for_each_entry(data2, &hwsim_radios, list) {
259                 struct sk_buff *nskb;
260
261                 if (data == data2)
262                         continue;
263
264                 if (!data2->started || !data2->radio_enabled ||
265                     !hwsim_ps_rx_ok(data2, skb) ||
266                     data->channel->center_freq != data2->channel->center_freq)
267                         continue;
268
269                 nskb = skb_copy(skb, GFP_ATOMIC);
270                 if (nskb == NULL)
271                         continue;
272
273                 if (memcmp(hdr->addr1, data2->hw->wiphy->perm_addr,
274                            ETH_ALEN) == 0)
275                         ack = true;
276                 ieee80211_rx_irqsafe(data2->hw, nskb, &rx_status);
277         }
278         spin_unlock(&hwsim_radio_lock);
279
280         return ack;
281 }
282
283
284 static int mac80211_hwsim_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
285 {
286         struct mac80211_hwsim_data *data = hw->priv;
287         bool ack;
288         struct ieee80211_tx_info *txi;
289
290         mac80211_hwsim_monitor_rx(hw, skb);
291
292         if (skb->len < 10) {
293                 /* Should not happen; just a sanity check for addr1 use */
294                 dev_kfree_skb(skb);
295                 return NETDEV_TX_OK;
296         }
297
298         if (!data->radio_enabled) {
299                 printk(KERN_DEBUG "%s: dropped TX frame since radio "
300                        "disabled\n", wiphy_name(hw->wiphy));
301                 dev_kfree_skb(skb);
302                 return NETDEV_TX_OK;
303         }
304
305         ack = mac80211_hwsim_tx_frame(hw, skb);
306
307         txi = IEEE80211_SKB_CB(skb);
308
309         if (txi->control.vif)
310                 hwsim_check_magic(txi->control.vif);
311         if (txi->control.sta)
312                 hwsim_check_sta_magic(txi->control.sta);
313
314         ieee80211_tx_info_clear_status(txi);
315         if (!(txi->flags & IEEE80211_TX_CTL_NO_ACK) && ack)
316                 txi->flags |= IEEE80211_TX_STAT_ACK;
317         ieee80211_tx_status_irqsafe(hw, skb);
318         return NETDEV_TX_OK;
319 }
320
321
322 static int mac80211_hwsim_start(struct ieee80211_hw *hw)
323 {
324         struct mac80211_hwsim_data *data = hw->priv;
325         printk(KERN_DEBUG "%s:%s\n", wiphy_name(hw->wiphy), __func__);
326         data->started = 1;
327         return 0;
328 }
329
330
331 static void mac80211_hwsim_stop(struct ieee80211_hw *hw)
332 {
333         struct mac80211_hwsim_data *data = hw->priv;
334         data->started = 0;
335         del_timer(&data->beacon_timer);
336         printk(KERN_DEBUG "%s:%s\n", wiphy_name(hw->wiphy), __func__);
337 }
338
339
340 static int mac80211_hwsim_add_interface(struct ieee80211_hw *hw,
341                                         struct ieee80211_if_init_conf *conf)
342 {
343         printk(KERN_DEBUG "%s:%s (type=%d mac_addr=%pM)\n",
344                wiphy_name(hw->wiphy), __func__, conf->type,
345                conf->mac_addr);
346         hwsim_set_magic(conf->vif);
347         return 0;
348 }
349
350
351 static void mac80211_hwsim_remove_interface(
352         struct ieee80211_hw *hw, struct ieee80211_if_init_conf *conf)
353 {
354         printk(KERN_DEBUG "%s:%s (type=%d mac_addr=%pM)\n",
355                wiphy_name(hw->wiphy), __func__, conf->type,
356                conf->mac_addr);
357         hwsim_check_magic(conf->vif);
358         hwsim_clear_magic(conf->vif);
359 }
360
361
362 static void mac80211_hwsim_beacon_tx(void *arg, u8 *mac,
363                                      struct ieee80211_vif *vif)
364 {
365         struct ieee80211_hw *hw = arg;
366         struct sk_buff *skb;
367         struct ieee80211_tx_info *info;
368
369         hwsim_check_magic(vif);
370
371         if (vif->type != NL80211_IFTYPE_AP &&
372             vif->type != NL80211_IFTYPE_MESH_POINT)
373                 return;
374
375         skb = ieee80211_beacon_get(hw, vif);
376         if (skb == NULL)
377                 return;
378         info = IEEE80211_SKB_CB(skb);
379
380         mac80211_hwsim_monitor_rx(hw, skb);
381         mac80211_hwsim_tx_frame(hw, skb);
382         dev_kfree_skb(skb);
383 }
384
385
386 static void mac80211_hwsim_beacon(unsigned long arg)
387 {
388         struct ieee80211_hw *hw = (struct ieee80211_hw *) arg;
389         struct mac80211_hwsim_data *data = hw->priv;
390
391         if (!data->started || !data->radio_enabled)
392                 return;
393
394         ieee80211_iterate_active_interfaces_atomic(
395                 hw, mac80211_hwsim_beacon_tx, hw);
396
397         data->beacon_timer.expires = jiffies + data->beacon_int;
398         add_timer(&data->beacon_timer);
399 }
400
401
402 static int mac80211_hwsim_config(struct ieee80211_hw *hw, u32 changed)
403 {
404         struct mac80211_hwsim_data *data = hw->priv;
405         struct ieee80211_conf *conf = &hw->conf;
406
407         printk(KERN_DEBUG "%s:%s (freq=%d radio_enabled=%d beacon_int=%d)\n",
408                wiphy_name(hw->wiphy), __func__,
409                conf->channel->center_freq, conf->radio_enabled,
410                conf->beacon_int);
411
412         data->channel = conf->channel;
413         data->radio_enabled = conf->radio_enabled;
414         data->beacon_int = 1024 * conf->beacon_int / 1000 * HZ / 1000;
415         if (data->beacon_int < 1)
416                 data->beacon_int = 1;
417
418         if (!data->started || !data->radio_enabled)
419                 del_timer(&data->beacon_timer);
420         else
421                 mod_timer(&data->beacon_timer, jiffies + data->beacon_int);
422
423         return 0;
424 }
425
426
427 static void mac80211_hwsim_configure_filter(struct ieee80211_hw *hw,
428                                             unsigned int changed_flags,
429                                             unsigned int *total_flags,
430                                             int mc_count,
431                                             struct dev_addr_list *mc_list)
432 {
433         struct mac80211_hwsim_data *data = hw->priv;
434
435         printk(KERN_DEBUG "%s:%s\n", wiphy_name(hw->wiphy), __func__);
436
437         data->rx_filter = 0;
438         if (*total_flags & FIF_PROMISC_IN_BSS)
439                 data->rx_filter |= FIF_PROMISC_IN_BSS;
440         if (*total_flags & FIF_ALLMULTI)
441                 data->rx_filter |= FIF_ALLMULTI;
442
443         *total_flags = data->rx_filter;
444 }
445
446 static int mac80211_hwsim_config_interface(struct ieee80211_hw *hw,
447                                            struct ieee80211_vif *vif,
448                                            struct ieee80211_if_conf *conf)
449 {
450         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
451
452         hwsim_check_magic(vif);
453         if (conf->changed & IEEE80211_IFCC_BSSID) {
454                 DECLARE_MAC_BUF(mac);
455                 printk(KERN_DEBUG "%s:%s: BSSID changed: %pM\n",
456                        wiphy_name(hw->wiphy), __func__,
457                        conf->bssid);
458                 memcpy(vp->bssid, conf->bssid, ETH_ALEN);
459         }
460         return 0;
461 }
462
463 static void mac80211_hwsim_bss_info_changed(struct ieee80211_hw *hw,
464                                             struct ieee80211_vif *vif,
465                                             struct ieee80211_bss_conf *info,
466                                             u32 changed)
467 {
468         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
469
470         hwsim_check_magic(vif);
471
472         printk(KERN_DEBUG "%s:%s(changed=0x%x)\n",
473                wiphy_name(hw->wiphy), __func__, changed);
474
475         if (changed & BSS_CHANGED_ASSOC) {
476                 printk(KERN_DEBUG "  %s: ASSOC: assoc=%d aid=%d\n",
477                        wiphy_name(hw->wiphy), info->assoc, info->aid);
478                 vp->assoc = info->assoc;
479                 vp->aid = info->aid;
480         }
481
482         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
483                 printk(KERN_DEBUG "  %s: ERP_CTS_PROT: %d\n",
484                        wiphy_name(hw->wiphy), info->use_cts_prot);
485         }
486
487         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
488                 printk(KERN_DEBUG "  %s: ERP_PREAMBLE: %d\n",
489                        wiphy_name(hw->wiphy), info->use_short_preamble);
490         }
491
492         if (changed & BSS_CHANGED_ERP_SLOT) {
493                 printk(KERN_DEBUG "  %s: ERP_SLOT: %d\n",
494                        wiphy_name(hw->wiphy), info->use_short_slot);
495         }
496
497         if (changed & BSS_CHANGED_HT) {
498                 printk(KERN_DEBUG "  %s: HT: op_mode=0x%x\n",
499                        wiphy_name(hw->wiphy),
500                        info->ht.operation_mode);
501         }
502
503         if (changed & BSS_CHANGED_BASIC_RATES) {
504                 printk(KERN_DEBUG "  %s: BASIC_RATES: 0x%llx\n",
505                        wiphy_name(hw->wiphy),
506                        (unsigned long long) info->basic_rates);
507         }
508 }
509
510 static void mac80211_hwsim_sta_notify(struct ieee80211_hw *hw,
511                                       struct ieee80211_vif *vif,
512                                       enum sta_notify_cmd cmd,
513                                       struct ieee80211_sta *sta)
514 {
515         hwsim_check_magic(vif);
516         switch (cmd) {
517         case STA_NOTIFY_ADD:
518                 hwsim_set_sta_magic(sta);
519                 break;
520         case STA_NOTIFY_REMOVE:
521                 hwsim_clear_sta_magic(sta);
522                 break;
523         case STA_NOTIFY_SLEEP:
524         case STA_NOTIFY_AWAKE:
525                 /* TODO: make good use of these flags */
526                 break;
527         }
528 }
529
530 static int mac80211_hwsim_set_tim(struct ieee80211_hw *hw,
531                                   struct ieee80211_sta *sta,
532                                   bool set)
533 {
534         hwsim_check_sta_magic(sta);
535         return 0;
536 }
537
538 static int mac80211_hwsim_conf_tx(
539         struct ieee80211_hw *hw, u16 queue,
540         const struct ieee80211_tx_queue_params *params)
541 {
542         printk(KERN_DEBUG "%s:%s (queue=%d txop=%d cw_min=%d cw_max=%d "
543                "aifs=%d)\n",
544                wiphy_name(hw->wiphy), __func__, queue,
545                params->txop, params->cw_min, params->cw_max, params->aifs);
546         return 0;
547 }
548
549 static const struct ieee80211_ops mac80211_hwsim_ops =
550 {
551         .tx = mac80211_hwsim_tx,
552         .start = mac80211_hwsim_start,
553         .stop = mac80211_hwsim_stop,
554         .add_interface = mac80211_hwsim_add_interface,
555         .remove_interface = mac80211_hwsim_remove_interface,
556         .config = mac80211_hwsim_config,
557         .configure_filter = mac80211_hwsim_configure_filter,
558         .config_interface = mac80211_hwsim_config_interface,
559         .bss_info_changed = mac80211_hwsim_bss_info_changed,
560         .sta_notify = mac80211_hwsim_sta_notify,
561         .set_tim = mac80211_hwsim_set_tim,
562         .conf_tx = mac80211_hwsim_conf_tx,
563 };
564
565
566 static void mac80211_hwsim_free(void)
567 {
568         struct list_head tmplist, *i, *tmp;
569         struct mac80211_hwsim_data *data;
570
571         INIT_LIST_HEAD(&tmplist);
572
573         spin_lock_bh(&hwsim_radio_lock);
574         list_for_each_safe(i, tmp, &hwsim_radios)
575                 list_move(i, &tmplist);
576         spin_unlock_bh(&hwsim_radio_lock);
577
578         list_for_each_entry(data, &tmplist, list) {
579                 debugfs_remove(data->debugfs_ps);
580                 debugfs_remove(data->debugfs);
581                 ieee80211_unregister_hw(data->hw);
582                 device_unregister(data->dev);
583                 ieee80211_free_hw(data->hw);
584         }
585         class_destroy(hwsim_class);
586 }
587
588
589 static struct device_driver mac80211_hwsim_driver = {
590         .name = "mac80211_hwsim"
591 };
592
593
594 static void hwsim_mon_setup(struct net_device *dev)
595 {
596         dev->hard_start_xmit = hwsim_mon_xmit;
597         dev->destructor = free_netdev;
598         ether_setup(dev);
599         dev->tx_queue_len = 0;
600         dev->type = ARPHRD_IEEE80211_RADIOTAP;
601         memset(dev->dev_addr, 0, ETH_ALEN);
602         dev->dev_addr[0] = 0x12;
603 }
604
605
606 static void hwsim_send_ps_poll(void *dat, u8 *mac, struct ieee80211_vif *vif)
607 {
608         struct mac80211_hwsim_data *data = dat;
609         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
610         DECLARE_MAC_BUF(buf);
611         struct sk_buff *skb;
612         struct ieee80211_pspoll *pspoll;
613
614         if (!vp->assoc)
615                 return;
616
617         printk(KERN_DEBUG "%s:%s: send PS-Poll to %pM for aid %d\n",
618                wiphy_name(data->hw->wiphy), __func__, vp->bssid, vp->aid);
619
620         skb = dev_alloc_skb(sizeof(*pspoll));
621         if (!skb)
622                 return;
623         pspoll = (void *) skb_put(skb, sizeof(*pspoll));
624         pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
625                                             IEEE80211_STYPE_PSPOLL |
626                                             IEEE80211_FCTL_PM);
627         pspoll->aid = cpu_to_le16(0xc000 | vp->aid);
628         memcpy(pspoll->bssid, vp->bssid, ETH_ALEN);
629         memcpy(pspoll->ta, mac, ETH_ALEN);
630         if (data->radio_enabled &&
631             !mac80211_hwsim_tx_frame(data->hw, skb))
632                 printk(KERN_DEBUG "%s: PS-Poll frame not ack'ed\n", __func__);
633         dev_kfree_skb(skb);
634 }
635
636
637 static void hwsim_send_nullfunc(struct mac80211_hwsim_data *data, u8 *mac,
638                                 struct ieee80211_vif *vif, int ps)
639 {
640         struct hwsim_vif_priv *vp = (void *)vif->drv_priv;
641         DECLARE_MAC_BUF(buf);
642         struct sk_buff *skb;
643         struct ieee80211_hdr *hdr;
644
645         if (!vp->assoc)
646                 return;
647
648         printk(KERN_DEBUG "%s:%s: send data::nullfunc to %pM ps=%d\n",
649                wiphy_name(data->hw->wiphy), __func__, vp->bssid, ps);
650
651         skb = dev_alloc_skb(sizeof(*hdr));
652         if (!skb)
653                 return;
654         hdr = (void *) skb_put(skb, sizeof(*hdr) - ETH_ALEN);
655         hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
656                                          IEEE80211_STYPE_NULLFUNC |
657                                          (ps ? IEEE80211_FCTL_PM : 0));
658         hdr->duration_id = cpu_to_le16(0);
659         memcpy(hdr->addr1, vp->bssid, ETH_ALEN);
660         memcpy(hdr->addr2, mac, ETH_ALEN);
661         memcpy(hdr->addr3, vp->bssid, ETH_ALEN);
662         if (data->radio_enabled &&
663             !mac80211_hwsim_tx_frame(data->hw, skb))
664                 printk(KERN_DEBUG "%s: nullfunc frame not ack'ed\n", __func__);
665         dev_kfree_skb(skb);
666 }
667
668
669 static void hwsim_send_nullfunc_ps(void *dat, u8 *mac,
670                                    struct ieee80211_vif *vif)
671 {
672         struct mac80211_hwsim_data *data = dat;
673         hwsim_send_nullfunc(data, mac, vif, 1);
674 }
675
676
677 static void hwsim_send_nullfunc_no_ps(void *dat, u8 *mac,
678                                       struct ieee80211_vif *vif)
679 {
680         struct mac80211_hwsim_data *data = dat;
681         hwsim_send_nullfunc(data, mac, vif, 0);
682 }
683
684
685 static int hwsim_fops_ps_read(void *dat, u64 *val)
686 {
687         struct mac80211_hwsim_data *data = dat;
688         *val = data->ps;
689         return 0;
690 }
691
692 static int hwsim_fops_ps_write(void *dat, u64 val)
693 {
694         struct mac80211_hwsim_data *data = dat;
695         enum ps_mode old_ps;
696
697         if (val != PS_DISABLED && val != PS_ENABLED && val != PS_AUTO_POLL &&
698             val != PS_MANUAL_POLL)
699                 return -EINVAL;
700
701         old_ps = data->ps;
702         data->ps = val;
703
704         if (val == PS_MANUAL_POLL) {
705                 ieee80211_iterate_active_interfaces(data->hw,
706                                                     hwsim_send_ps_poll, data);
707                 data->ps_poll_pending = true;
708         } else if (old_ps == PS_DISABLED && val != PS_DISABLED) {
709                 ieee80211_iterate_active_interfaces(data->hw,
710                                                     hwsim_send_nullfunc_ps,
711                                                     data);
712         } else if (old_ps != PS_DISABLED && val == PS_DISABLED) {
713                 ieee80211_iterate_active_interfaces(data->hw,
714                                                     hwsim_send_nullfunc_no_ps,
715                                                     data);
716         }
717
718         return 0;
719 }
720
721 DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_ps, hwsim_fops_ps_read, hwsim_fops_ps_write,
722                         "%llu\n");
723
724
725 static int __init init_mac80211_hwsim(void)
726 {
727         int i, err = 0;
728         u8 addr[ETH_ALEN];
729         struct mac80211_hwsim_data *data;
730         struct ieee80211_hw *hw;
731
732         if (radios < 1 || radios > 100)
733                 return -EINVAL;
734
735         spin_lock_init(&hwsim_radio_lock);
736         INIT_LIST_HEAD(&hwsim_radios);
737
738         hwsim_class = class_create(THIS_MODULE, "mac80211_hwsim");
739         if (IS_ERR(hwsim_class))
740                 return PTR_ERR(hwsim_class);
741
742         memset(addr, 0, ETH_ALEN);
743         addr[0] = 0x02;
744
745         for (i = 0; i < radios; i++) {
746                 printk(KERN_DEBUG "mac80211_hwsim: Initializing radio %d\n",
747                        i);
748                 hw = ieee80211_alloc_hw(sizeof(*data), &mac80211_hwsim_ops);
749                 if (!hw) {
750                         printk(KERN_DEBUG "mac80211_hwsim: ieee80211_alloc_hw "
751                                "failed\n");
752                         err = -ENOMEM;
753                         goto failed;
754                 }
755                 data = hw->priv;
756                 data->hw = hw;
757
758                 data->dev = device_create(hwsim_class, NULL, 0, hw,
759                                           "hwsim%d", i);
760                 if (IS_ERR(data->dev)) {
761                         printk(KERN_DEBUG
762                                "mac80211_hwsim: device_create "
763                                "failed (%ld)\n", PTR_ERR(data->dev));
764                         err = -ENOMEM;
765                         goto failed_drvdata;
766                 }
767                 data->dev->driver = &mac80211_hwsim_driver;
768
769                 SET_IEEE80211_DEV(hw, data->dev);
770                 addr[3] = i >> 8;
771                 addr[4] = i;
772                 SET_IEEE80211_PERM_ADDR(hw, addr);
773
774                 hw->channel_change_time = 1;
775                 hw->queues = 4;
776                 hw->wiphy->interface_modes =
777                         BIT(NL80211_IFTYPE_STATION) |
778                         BIT(NL80211_IFTYPE_AP) |
779                         BIT(NL80211_IFTYPE_MESH_POINT);
780                 hw->ampdu_queues = 1;
781
782                 /* ask mac80211 to reserve space for magic */
783                 hw->vif_data_size = sizeof(struct hwsim_vif_priv);
784                 hw->sta_data_size = sizeof(struct hwsim_sta_priv);
785
786                 memcpy(data->channels, hwsim_channels, sizeof(hwsim_channels));
787                 memcpy(data->rates, hwsim_rates, sizeof(hwsim_rates));
788                 data->band.channels = data->channels;
789                 data->band.n_channels = ARRAY_SIZE(hwsim_channels);
790                 data->band.bitrates = data->rates;
791                 data->band.n_bitrates = ARRAY_SIZE(hwsim_rates);
792                 data->band.ht_cap.ht_supported = true;
793                 data->band.ht_cap.cap = IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
794                         IEEE80211_HT_CAP_GRN_FLD |
795                         IEEE80211_HT_CAP_SGI_40 |
796                         IEEE80211_HT_CAP_DSSSCCK40;
797                 data->band.ht_cap.ampdu_factor = 0x3;
798                 data->band.ht_cap.ampdu_density = 0x6;
799                 memset(&data->band.ht_cap.mcs, 0,
800                        sizeof(data->band.ht_cap.mcs));
801                 data->band.ht_cap.mcs.rx_mask[0] = 0xff;
802                 data->band.ht_cap.mcs.rx_mask[1] = 0xff;
803                 data->band.ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
804                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &data->band;
805
806                 err = ieee80211_register_hw(hw);
807                 if (err < 0) {
808                         printk(KERN_DEBUG "mac80211_hwsim: "
809                                "ieee80211_register_hw failed (%d)\n", err);
810                         goto failed_hw;
811                 }
812
813                 printk(KERN_DEBUG "%s: hwaddr %pM registered\n",
814                        wiphy_name(hw->wiphy),
815                        hw->wiphy->perm_addr);
816
817                 data->debugfs = debugfs_create_dir("hwsim",
818                                                    hw->wiphy->debugfsdir);
819                 data->debugfs_ps = debugfs_create_file("ps", 0666,
820                                                        data->debugfs, data,
821                                                        &hwsim_fops_ps);
822
823                 setup_timer(&data->beacon_timer, mac80211_hwsim_beacon,
824                             (unsigned long) hw);
825
826                 list_add_tail(&data->list, &hwsim_radios);
827         }
828
829         hwsim_mon = alloc_netdev(0, "hwsim%d", hwsim_mon_setup);
830         if (hwsim_mon == NULL)
831                 goto failed;
832
833         rtnl_lock();
834
835         err = dev_alloc_name(hwsim_mon, hwsim_mon->name);
836         if (err < 0)
837                 goto failed_mon;
838
839
840         err = register_netdevice(hwsim_mon);
841         if (err < 0)
842                 goto failed_mon;
843
844         rtnl_unlock();
845
846         return 0;
847
848 failed_mon:
849         rtnl_unlock();
850         free_netdev(hwsim_mon);
851         mac80211_hwsim_free();
852         return err;
853
854 failed_hw:
855         device_unregister(data->dev);
856 failed_drvdata:
857         ieee80211_free_hw(hw);
858 failed:
859         mac80211_hwsim_free();
860         return err;
861 }
862
863
864 static void __exit exit_mac80211_hwsim(void)
865 {
866         printk(KERN_DEBUG "mac80211_hwsim: unregister radios\n");
867
868         unregister_netdev(hwsim_mon);
869         mac80211_hwsim_free();
870 }
871
872
873 module_init(init_mac80211_hwsim);
874 module_exit(exit_mac80211_hwsim);