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f0706e82 JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
10 | ||
11 | #include <net/mac80211.h> | |
12 | #include <net/ieee80211_radiotap.h> | |
13 | #include <linux/module.h> | |
14 | #include <linux/init.h> | |
15 | #include <linux/netdevice.h> | |
16 | #include <linux/types.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/skbuff.h> | |
19 | #include <linux/etherdevice.h> | |
20 | #include <linux/if_arp.h> | |
21 | #include <linux/wireless.h> | |
22 | #include <linux/rtnetlink.h> | |
23 | #include <net/iw_handler.h> | |
24 | #include <linux/compiler.h> | |
25 | #include <linux/bitmap.h> | |
26 | #include <net/cfg80211.h> | |
27 | ||
28 | #include "ieee80211_common.h" | |
29 | #include "ieee80211_i.h" | |
30 | #include "ieee80211_rate.h" | |
31 | #include "wep.h" | |
32 | #include "wpa.h" | |
33 | #include "tkip.h" | |
34 | #include "wme.h" | |
35 | #include "aes_ccm.h" | |
36 | #include "ieee80211_led.h" | |
37 | #include "ieee80211_cfg.h" | |
e9f207f0 JB |
38 | #include "debugfs.h" |
39 | #include "debugfs_netdev.h" | |
40 | #include "debugfs_key.h" | |
f0706e82 JB |
41 | |
42 | /* privid for wiphys to determine whether they belong to us or not */ | |
43 | void *mac80211_wiphy_privid = &mac80211_wiphy_privid; | |
44 | ||
45 | /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */ | |
46 | /* Ethernet-II snap header (RFC1042 for most EtherTypes) */ | |
47 | static const unsigned char rfc1042_header[] = | |
48 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 }; | |
49 | ||
50 | /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */ | |
51 | static const unsigned char bridge_tunnel_header[] = | |
52 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 }; | |
53 | ||
54 | /* No encapsulation header if EtherType < 0x600 (=length) */ | |
55 | static const unsigned char eapol_header[] = | |
56 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00, 0x88, 0x8e }; | |
57 | ||
58 | ||
59 | static inline void ieee80211_include_sequence(struct ieee80211_sub_if_data *sdata, | |
60 | struct ieee80211_hdr *hdr) | |
61 | { | |
62 | /* Set the sequence number for this frame. */ | |
63 | hdr->seq_ctrl = cpu_to_le16(sdata->sequence); | |
64 | ||
65 | /* Increase the sequence number. */ | |
66 | sdata->sequence = (sdata->sequence + 0x10) & IEEE80211_SCTL_SEQ; | |
67 | } | |
68 | ||
69 | struct ieee80211_key_conf * | |
70 | ieee80211_key_data2conf(struct ieee80211_local *local, | |
71 | const struct ieee80211_key *data) | |
72 | { | |
73 | struct ieee80211_key_conf *conf; | |
74 | ||
75 | conf = kmalloc(sizeof(*conf) + data->keylen, GFP_ATOMIC); | |
76 | if (!conf) | |
77 | return NULL; | |
78 | ||
79 | conf->hw_key_idx = data->hw_key_idx; | |
80 | conf->alg = data->alg; | |
81 | conf->keylen = data->keylen; | |
82 | conf->flags = 0; | |
83 | if (data->force_sw_encrypt) | |
84 | conf->flags |= IEEE80211_KEY_FORCE_SW_ENCRYPT; | |
85 | conf->keyidx = data->keyidx; | |
86 | if (data->default_tx_key) | |
87 | conf->flags |= IEEE80211_KEY_DEFAULT_TX_KEY; | |
88 | if (local->default_wep_only) | |
89 | conf->flags |= IEEE80211_KEY_DEFAULT_WEP_ONLY; | |
90 | memcpy(conf->key, data->key, data->keylen); | |
91 | ||
92 | return conf; | |
93 | } | |
94 | ||
95 | struct ieee80211_key *ieee80211_key_alloc(struct ieee80211_sub_if_data *sdata, | |
96 | int idx, size_t key_len, gfp_t flags) | |
97 | { | |
98 | struct ieee80211_key *key; | |
99 | ||
100 | key = kzalloc(sizeof(struct ieee80211_key) + key_len, flags); | |
101 | if (!key) | |
102 | return NULL; | |
103 | kref_init(&key->kref); | |
104 | return key; | |
105 | } | |
106 | ||
107 | static void ieee80211_key_release(struct kref *kref) | |
108 | { | |
109 | struct ieee80211_key *key; | |
110 | ||
111 | key = container_of(kref, struct ieee80211_key, kref); | |
112 | if (key->alg == ALG_CCMP) | |
113 | ieee80211_aes_key_free(key->u.ccmp.tfm); | |
e9f207f0 | 114 | ieee80211_debugfs_key_remove(key); |
f0706e82 JB |
115 | kfree(key); |
116 | } | |
117 | ||
118 | void ieee80211_key_free(struct ieee80211_key *key) | |
119 | { | |
120 | if (key) | |
121 | kref_put(&key->kref, ieee80211_key_release); | |
122 | } | |
123 | ||
124 | static int rate_list_match(const int *rate_list, int rate) | |
125 | { | |
126 | int i; | |
127 | ||
128 | if (!rate_list) | |
129 | return 0; | |
130 | ||
131 | for (i = 0; rate_list[i] >= 0; i++) | |
132 | if (rate_list[i] == rate) | |
133 | return 1; | |
134 | ||
135 | return 0; | |
136 | } | |
137 | ||
138 | ||
139 | void ieee80211_prepare_rates(struct ieee80211_local *local, | |
140 | struct ieee80211_hw_mode *mode) | |
141 | { | |
142 | int i; | |
143 | ||
144 | for (i = 0; i < mode->num_rates; i++) { | |
145 | struct ieee80211_rate *rate = &mode->rates[i]; | |
146 | ||
147 | rate->flags &= ~(IEEE80211_RATE_SUPPORTED | | |
148 | IEEE80211_RATE_BASIC); | |
149 | ||
150 | if (local->supp_rates[mode->mode]) { | |
151 | if (!rate_list_match(local->supp_rates[mode->mode], | |
152 | rate->rate)) | |
153 | continue; | |
154 | } | |
155 | ||
156 | rate->flags |= IEEE80211_RATE_SUPPORTED; | |
157 | ||
158 | /* Use configured basic rate set if it is available. If not, | |
159 | * use defaults that are sane for most cases. */ | |
160 | if (local->basic_rates[mode->mode]) { | |
161 | if (rate_list_match(local->basic_rates[mode->mode], | |
162 | rate->rate)) | |
163 | rate->flags |= IEEE80211_RATE_BASIC; | |
164 | } else switch (mode->mode) { | |
165 | case MODE_IEEE80211A: | |
166 | if (rate->rate == 60 || rate->rate == 120 || | |
167 | rate->rate == 240) | |
168 | rate->flags |= IEEE80211_RATE_BASIC; | |
169 | break; | |
170 | case MODE_IEEE80211B: | |
171 | if (rate->rate == 10 || rate->rate == 20) | |
172 | rate->flags |= IEEE80211_RATE_BASIC; | |
173 | break; | |
174 | case MODE_ATHEROS_TURBO: | |
175 | if (rate->rate == 120 || rate->rate == 240 || | |
176 | rate->rate == 480) | |
177 | rate->flags |= IEEE80211_RATE_BASIC; | |
178 | break; | |
179 | case MODE_IEEE80211G: | |
180 | if (rate->rate == 10 || rate->rate == 20 || | |
181 | rate->rate == 55 || rate->rate == 110) | |
182 | rate->flags |= IEEE80211_RATE_BASIC; | |
183 | break; | |
184 | } | |
185 | ||
186 | /* Set ERP and MANDATORY flags based on phymode */ | |
187 | switch (mode->mode) { | |
188 | case MODE_IEEE80211A: | |
189 | if (rate->rate == 60 || rate->rate == 120 || | |
190 | rate->rate == 240) | |
191 | rate->flags |= IEEE80211_RATE_MANDATORY; | |
192 | break; | |
193 | case MODE_IEEE80211B: | |
194 | if (rate->rate == 10) | |
195 | rate->flags |= IEEE80211_RATE_MANDATORY; | |
196 | break; | |
197 | case MODE_ATHEROS_TURBO: | |
198 | break; | |
199 | case MODE_IEEE80211G: | |
200 | if (rate->rate == 10 || rate->rate == 20 || | |
201 | rate->rate == 55 || rate->rate == 110 || | |
202 | rate->rate == 60 || rate->rate == 120 || | |
203 | rate->rate == 240) | |
204 | rate->flags |= IEEE80211_RATE_MANDATORY; | |
205 | break; | |
206 | } | |
207 | if (ieee80211_is_erp_rate(mode->mode, rate->rate)) | |
208 | rate->flags |= IEEE80211_RATE_ERP; | |
209 | } | |
210 | } | |
211 | ||
212 | ||
213 | static void ieee80211_key_threshold_notify(struct net_device *dev, | |
214 | struct ieee80211_key *key, | |
215 | struct sta_info *sta) | |
216 | { | |
217 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
218 | struct sk_buff *skb; | |
219 | struct ieee80211_msg_key_notification *msg; | |
220 | ||
221 | /* if no one will get it anyway, don't even allocate it. | |
222 | * unlikely because this is only relevant for APs | |
223 | * where the device must be open... */ | |
224 | if (unlikely(!local->apdev)) | |
225 | return; | |
226 | ||
227 | skb = dev_alloc_skb(sizeof(struct ieee80211_frame_info) + | |
228 | sizeof(struct ieee80211_msg_key_notification)); | |
229 | if (!skb) | |
230 | return; | |
231 | ||
232 | skb_reserve(skb, sizeof(struct ieee80211_frame_info)); | |
233 | msg = (struct ieee80211_msg_key_notification *) | |
234 | skb_put(skb, sizeof(struct ieee80211_msg_key_notification)); | |
235 | msg->tx_rx_count = key->tx_rx_count; | |
236 | memcpy(msg->ifname, dev->name, IFNAMSIZ); | |
237 | if (sta) | |
238 | memcpy(msg->addr, sta->addr, ETH_ALEN); | |
239 | else | |
240 | memset(msg->addr, 0xff, ETH_ALEN); | |
241 | ||
242 | key->tx_rx_count = 0; | |
243 | ||
244 | ieee80211_rx_mgmt(local, skb, NULL, | |
245 | ieee80211_msg_key_threshold_notification); | |
246 | } | |
247 | ||
248 | ||
249 | static u8 * ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len) | |
250 | { | |
251 | u16 fc; | |
252 | ||
253 | if (len < 24) | |
254 | return NULL; | |
255 | ||
256 | fc = le16_to_cpu(hdr->frame_control); | |
257 | ||
258 | switch (fc & IEEE80211_FCTL_FTYPE) { | |
259 | case IEEE80211_FTYPE_DATA: | |
260 | switch (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) { | |
261 | case IEEE80211_FCTL_TODS: | |
262 | return hdr->addr1; | |
263 | case (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS): | |
264 | return NULL; | |
265 | case IEEE80211_FCTL_FROMDS: | |
266 | return hdr->addr2; | |
267 | case 0: | |
268 | return hdr->addr3; | |
269 | } | |
270 | break; | |
271 | case IEEE80211_FTYPE_MGMT: | |
272 | return hdr->addr3; | |
273 | case IEEE80211_FTYPE_CTL: | |
274 | if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PSPOLL) | |
275 | return hdr->addr1; | |
276 | else | |
277 | return NULL; | |
278 | } | |
279 | ||
280 | return NULL; | |
281 | } | |
282 | ||
283 | int ieee80211_get_hdrlen(u16 fc) | |
284 | { | |
285 | int hdrlen = 24; | |
286 | ||
287 | switch (fc & IEEE80211_FCTL_FTYPE) { | |
288 | case IEEE80211_FTYPE_DATA: | |
289 | if ((fc & IEEE80211_FCTL_FROMDS) && (fc & IEEE80211_FCTL_TODS)) | |
290 | hdrlen = 30; /* Addr4 */ | |
291 | /* | |
292 | * The QoS Control field is two bytes and its presence is | |
293 | * indicated by the IEEE80211_STYPE_QOS_DATA bit. Add 2 to | |
294 | * hdrlen if that bit is set. | |
295 | * This works by masking out the bit and shifting it to | |
296 | * bit position 1 so the result has the value 0 or 2. | |
297 | */ | |
298 | hdrlen += (fc & IEEE80211_STYPE_QOS_DATA) | |
299 | >> (ilog2(IEEE80211_STYPE_QOS_DATA)-1); | |
300 | break; | |
301 | case IEEE80211_FTYPE_CTL: | |
302 | /* | |
303 | * ACK and CTS are 10 bytes, all others 16. To see how | |
304 | * to get this condition consider | |
305 | * subtype mask: 0b0000000011110000 (0x00F0) | |
306 | * ACK subtype: 0b0000000011010000 (0x00D0) | |
307 | * CTS subtype: 0b0000000011000000 (0x00C0) | |
308 | * bits that matter: ^^^ (0x00E0) | |
309 | * value of those: 0b0000000011000000 (0x00C0) | |
310 | */ | |
311 | if ((fc & 0xE0) == 0xC0) | |
312 | hdrlen = 10; | |
313 | else | |
314 | hdrlen = 16; | |
315 | break; | |
316 | } | |
317 | ||
318 | return hdrlen; | |
319 | } | |
320 | EXPORT_SYMBOL(ieee80211_get_hdrlen); | |
321 | ||
322 | int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb) | |
323 | { | |
324 | const struct ieee80211_hdr *hdr = (const struct ieee80211_hdr *) skb->data; | |
325 | int hdrlen; | |
326 | ||
327 | if (unlikely(skb->len < 10)) | |
328 | return 0; | |
329 | hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_control)); | |
330 | if (unlikely(hdrlen > skb->len)) | |
331 | return 0; | |
332 | return hdrlen; | |
333 | } | |
334 | EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb); | |
335 | ||
336 | static int ieee80211_get_radiotap_len(struct sk_buff *skb) | |
337 | { | |
338 | struct ieee80211_radiotap_header *hdr = | |
339 | (struct ieee80211_radiotap_header *) skb->data; | |
340 | ||
341 | return le16_to_cpu(hdr->it_len); | |
342 | } | |
343 | ||
344 | #ifdef CONFIG_MAC80211_LOWTX_FRAME_DUMP | |
345 | static void ieee80211_dump_frame(const char *ifname, const char *title, | |
346 | const struct sk_buff *skb) | |
347 | { | |
348 | const struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
349 | u16 fc; | |
350 | int hdrlen; | |
351 | ||
352 | printk(KERN_DEBUG "%s: %s (len=%d)", ifname, title, skb->len); | |
353 | if (skb->len < 4) { | |
354 | printk("\n"); | |
355 | return; | |
356 | } | |
357 | ||
358 | fc = le16_to_cpu(hdr->frame_control); | |
359 | hdrlen = ieee80211_get_hdrlen(fc); | |
360 | if (hdrlen > skb->len) | |
361 | hdrlen = skb->len; | |
362 | if (hdrlen >= 4) | |
363 | printk(" FC=0x%04x DUR=0x%04x", | |
364 | fc, le16_to_cpu(hdr->duration_id)); | |
365 | if (hdrlen >= 10) | |
366 | printk(" A1=" MAC_FMT, MAC_ARG(hdr->addr1)); | |
367 | if (hdrlen >= 16) | |
368 | printk(" A2=" MAC_FMT, MAC_ARG(hdr->addr2)); | |
369 | if (hdrlen >= 24) | |
370 | printk(" A3=" MAC_FMT, MAC_ARG(hdr->addr3)); | |
371 | if (hdrlen >= 30) | |
372 | printk(" A4=" MAC_FMT, MAC_ARG(hdr->addr4)); | |
373 | printk("\n"); | |
374 | } | |
375 | #else /* CONFIG_MAC80211_LOWTX_FRAME_DUMP */ | |
376 | static inline void ieee80211_dump_frame(const char *ifname, const char *title, | |
377 | struct sk_buff *skb) | |
378 | { | |
379 | } | |
380 | #endif /* CONFIG_MAC80211_LOWTX_FRAME_DUMP */ | |
381 | ||
382 | ||
383 | static int ieee80211_is_eapol(const struct sk_buff *skb) | |
384 | { | |
385 | const struct ieee80211_hdr *hdr; | |
386 | u16 fc; | |
387 | int hdrlen; | |
388 | ||
389 | if (unlikely(skb->len < 10)) | |
390 | return 0; | |
391 | ||
392 | hdr = (const struct ieee80211_hdr *) skb->data; | |
393 | fc = le16_to_cpu(hdr->frame_control); | |
394 | ||
395 | if (unlikely(!WLAN_FC_DATA_PRESENT(fc))) | |
396 | return 0; | |
397 | ||
398 | hdrlen = ieee80211_get_hdrlen(fc); | |
399 | ||
400 | if (unlikely(skb->len >= hdrlen + sizeof(eapol_header) && | |
401 | memcmp(skb->data + hdrlen, eapol_header, | |
402 | sizeof(eapol_header)) == 0)) | |
403 | return 1; | |
404 | ||
405 | return 0; | |
406 | } | |
407 | ||
408 | ||
409 | static ieee80211_txrx_result | |
410 | ieee80211_tx_h_rate_ctrl(struct ieee80211_txrx_data *tx) | |
411 | { | |
412 | struct rate_control_extra extra; | |
413 | ||
414 | memset(&extra, 0, sizeof(extra)); | |
415 | extra.mode = tx->u.tx.mode; | |
416 | extra.mgmt_data = tx->sdata && | |
417 | tx->sdata->type == IEEE80211_IF_TYPE_MGMT; | |
418 | extra.ethertype = tx->ethertype; | |
419 | ||
420 | tx->u.tx.rate = rate_control_get_rate(tx->local, tx->dev, tx->skb, | |
421 | &extra); | |
422 | if (unlikely(extra.probe != NULL)) { | |
423 | tx->u.tx.control->flags |= IEEE80211_TXCTL_RATE_CTRL_PROBE; | |
424 | tx->u.tx.probe_last_frag = 1; | |
425 | tx->u.tx.control->alt_retry_rate = tx->u.tx.rate->val; | |
426 | tx->u.tx.rate = extra.probe; | |
427 | } else { | |
428 | tx->u.tx.control->alt_retry_rate = -1; | |
429 | } | |
430 | if (!tx->u.tx.rate) | |
431 | return TXRX_DROP; | |
432 | if (tx->u.tx.mode->mode == MODE_IEEE80211G && | |
433 | tx->local->cts_protect_erp_frames && tx->fragmented && | |
434 | extra.nonerp) { | |
435 | tx->u.tx.last_frag_rate = tx->u.tx.rate; | |
436 | tx->u.tx.probe_last_frag = extra.probe ? 1 : 0; | |
437 | ||
438 | tx->u.tx.rate = extra.nonerp; | |
439 | tx->u.tx.control->rate = extra.nonerp; | |
440 | tx->u.tx.control->flags &= ~IEEE80211_TXCTL_RATE_CTRL_PROBE; | |
441 | } else { | |
442 | tx->u.tx.last_frag_rate = tx->u.tx.rate; | |
443 | tx->u.tx.control->rate = tx->u.tx.rate; | |
444 | } | |
445 | tx->u.tx.control->tx_rate = tx->u.tx.rate->val; | |
446 | if ((tx->u.tx.rate->flags & IEEE80211_RATE_PREAMBLE2) && | |
447 | tx->local->short_preamble && | |
448 | (!tx->sta || (tx->sta->flags & WLAN_STA_SHORT_PREAMBLE))) { | |
449 | tx->u.tx.short_preamble = 1; | |
450 | tx->u.tx.control->tx_rate = tx->u.tx.rate->val2; | |
451 | } | |
452 | ||
453 | return TXRX_CONTINUE; | |
454 | } | |
455 | ||
456 | ||
457 | static ieee80211_txrx_result | |
458 | ieee80211_tx_h_select_key(struct ieee80211_txrx_data *tx) | |
459 | { | |
460 | if (tx->sta) | |
461 | tx->u.tx.control->key_idx = tx->sta->key_idx_compression; | |
462 | else | |
463 | tx->u.tx.control->key_idx = HW_KEY_IDX_INVALID; | |
464 | ||
465 | if (unlikely(tx->u.tx.control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT)) | |
466 | tx->key = NULL; | |
467 | else if (tx->sta && tx->sta->key) | |
468 | tx->key = tx->sta->key; | |
469 | else if (tx->sdata->default_key) | |
470 | tx->key = tx->sdata->default_key; | |
471 | else if (tx->sdata->drop_unencrypted && | |
472 | !(tx->sdata->eapol && ieee80211_is_eapol(tx->skb))) { | |
473 | I802_DEBUG_INC(tx->local->tx_handlers_drop_unencrypted); | |
474 | return TXRX_DROP; | |
475 | } else | |
476 | tx->key = NULL; | |
477 | ||
478 | if (tx->key) { | |
479 | tx->key->tx_rx_count++; | |
480 | if (unlikely(tx->local->key_tx_rx_threshold && | |
481 | tx->key->tx_rx_count > | |
482 | tx->local->key_tx_rx_threshold)) { | |
483 | ieee80211_key_threshold_notify(tx->dev, tx->key, | |
484 | tx->sta); | |
485 | } | |
486 | } | |
487 | ||
488 | return TXRX_CONTINUE; | |
489 | } | |
490 | ||
491 | ||
492 | static ieee80211_txrx_result | |
493 | ieee80211_tx_h_fragment(struct ieee80211_txrx_data *tx) | |
494 | { | |
495 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data; | |
496 | size_t hdrlen, per_fragm, num_fragm, payload_len, left; | |
497 | struct sk_buff **frags, *first, *frag; | |
498 | int i; | |
499 | u16 seq; | |
500 | u8 *pos; | |
501 | int frag_threshold = tx->local->fragmentation_threshold; | |
502 | ||
503 | if (!tx->fragmented) | |
504 | return TXRX_CONTINUE; | |
505 | ||
506 | first = tx->skb; | |
507 | ||
508 | hdrlen = ieee80211_get_hdrlen(tx->fc); | |
509 | payload_len = first->len - hdrlen; | |
510 | per_fragm = frag_threshold - hdrlen - FCS_LEN; | |
511 | num_fragm = (payload_len + per_fragm - 1) / per_fragm; | |
512 | ||
513 | frags = kzalloc(num_fragm * sizeof(struct sk_buff *), GFP_ATOMIC); | |
514 | if (!frags) | |
515 | goto fail; | |
516 | ||
517 | hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_MOREFRAGS); | |
518 | seq = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_SEQ; | |
519 | pos = first->data + hdrlen + per_fragm; | |
520 | left = payload_len - per_fragm; | |
521 | for (i = 0; i < num_fragm - 1; i++) { | |
522 | struct ieee80211_hdr *fhdr; | |
523 | size_t copylen; | |
524 | ||
525 | if (left <= 0) | |
526 | goto fail; | |
527 | ||
528 | /* reserve enough extra head and tail room for possible | |
529 | * encryption */ | |
530 | frag = frags[i] = | |
531 | dev_alloc_skb(tx->local->hw.extra_tx_headroom + | |
532 | frag_threshold + | |
533 | IEEE80211_ENCRYPT_HEADROOM + | |
534 | IEEE80211_ENCRYPT_TAILROOM); | |
535 | if (!frag) | |
536 | goto fail; | |
537 | /* Make sure that all fragments use the same priority so | |
538 | * that they end up using the same TX queue */ | |
539 | frag->priority = first->priority; | |
540 | skb_reserve(frag, tx->local->hw.extra_tx_headroom + | |
541 | IEEE80211_ENCRYPT_HEADROOM); | |
542 | fhdr = (struct ieee80211_hdr *) skb_put(frag, hdrlen); | |
543 | memcpy(fhdr, first->data, hdrlen); | |
544 | if (i == num_fragm - 2) | |
545 | fhdr->frame_control &= cpu_to_le16(~IEEE80211_FCTL_MOREFRAGS); | |
546 | fhdr->seq_ctrl = cpu_to_le16(seq | ((i + 1) & IEEE80211_SCTL_FRAG)); | |
547 | copylen = left > per_fragm ? per_fragm : left; | |
548 | memcpy(skb_put(frag, copylen), pos, copylen); | |
549 | ||
550 | pos += copylen; | |
551 | left -= copylen; | |
552 | } | |
553 | skb_trim(first, hdrlen + per_fragm); | |
554 | ||
555 | tx->u.tx.num_extra_frag = num_fragm - 1; | |
556 | tx->u.tx.extra_frag = frags; | |
557 | ||
558 | return TXRX_CONTINUE; | |
559 | ||
560 | fail: | |
561 | printk(KERN_DEBUG "%s: failed to fragment frame\n", tx->dev->name); | |
562 | if (frags) { | |
563 | for (i = 0; i < num_fragm - 1; i++) | |
564 | if (frags[i]) | |
565 | dev_kfree_skb(frags[i]); | |
566 | kfree(frags); | |
567 | } | |
568 | I802_DEBUG_INC(tx->local->tx_handlers_drop_fragment); | |
569 | return TXRX_DROP; | |
570 | } | |
571 | ||
572 | ||
573 | static int wep_encrypt_skb(struct ieee80211_txrx_data *tx, struct sk_buff *skb) | |
574 | { | |
575 | if (tx->key->force_sw_encrypt) { | |
576 | if (ieee80211_wep_encrypt(tx->local, skb, tx->key)) | |
577 | return -1; | |
578 | } else { | |
579 | tx->u.tx.control->key_idx = tx->key->hw_key_idx; | |
580 | if (tx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) { | |
581 | if (ieee80211_wep_add_iv(tx->local, skb, tx->key) == | |
582 | NULL) | |
583 | return -1; | |
584 | } | |
585 | } | |
586 | return 0; | |
587 | } | |
588 | ||
589 | ||
590 | void ieee80211_tx_set_iswep(struct ieee80211_txrx_data *tx) | |
591 | { | |
592 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data; | |
593 | ||
594 | hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
595 | if (tx->u.tx.extra_frag) { | |
596 | struct ieee80211_hdr *fhdr; | |
597 | int i; | |
598 | for (i = 0; i < tx->u.tx.num_extra_frag; i++) { | |
599 | fhdr = (struct ieee80211_hdr *) | |
600 | tx->u.tx.extra_frag[i]->data; | |
601 | fhdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
602 | } | |
603 | } | |
604 | } | |
605 | ||
606 | ||
607 | static ieee80211_txrx_result | |
608 | ieee80211_tx_h_wep_encrypt(struct ieee80211_txrx_data *tx) | |
609 | { | |
610 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data; | |
611 | u16 fc; | |
612 | ||
613 | fc = le16_to_cpu(hdr->frame_control); | |
614 | ||
615 | if (!tx->key || tx->key->alg != ALG_WEP || | |
616 | ((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA && | |
617 | ((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT || | |
618 | (fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_AUTH))) | |
619 | return TXRX_CONTINUE; | |
620 | ||
621 | tx->u.tx.control->iv_len = WEP_IV_LEN; | |
622 | tx->u.tx.control->icv_len = WEP_ICV_LEN; | |
623 | ieee80211_tx_set_iswep(tx); | |
624 | ||
625 | if (wep_encrypt_skb(tx, tx->skb) < 0) { | |
626 | I802_DEBUG_INC(tx->local->tx_handlers_drop_wep); | |
627 | return TXRX_DROP; | |
628 | } | |
629 | ||
630 | if (tx->u.tx.extra_frag) { | |
631 | int i; | |
632 | for (i = 0; i < tx->u.tx.num_extra_frag; i++) { | |
633 | if (wep_encrypt_skb(tx, tx->u.tx.extra_frag[i]) < 0) { | |
634 | I802_DEBUG_INC(tx->local-> | |
635 | tx_handlers_drop_wep); | |
636 | return TXRX_DROP; | |
637 | } | |
638 | } | |
639 | } | |
640 | ||
641 | return TXRX_CONTINUE; | |
642 | } | |
643 | ||
644 | ||
645 | static int ieee80211_frame_duration(struct ieee80211_local *local, size_t len, | |
646 | int rate, int erp, int short_preamble) | |
647 | { | |
648 | int dur; | |
649 | ||
650 | /* calculate duration (in microseconds, rounded up to next higher | |
651 | * integer if it includes a fractional microsecond) to send frame of | |
652 | * len bytes (does not include FCS) at the given rate. Duration will | |
653 | * also include SIFS. | |
654 | * | |
655 | * rate is in 100 kbps, so divident is multiplied by 10 in the | |
656 | * DIV_ROUND_UP() operations. | |
657 | */ | |
658 | ||
659 | if (local->hw.conf.phymode == MODE_IEEE80211A || erp || | |
660 | local->hw.conf.phymode == MODE_ATHEROS_TURBO) { | |
661 | /* | |
662 | * OFDM: | |
663 | * | |
664 | * N_DBPS = DATARATE x 4 | |
665 | * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS) | |
666 | * (16 = SIGNAL time, 6 = tail bits) | |
667 | * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext | |
668 | * | |
669 | * T_SYM = 4 usec | |
670 | * 802.11a - 17.5.2: aSIFSTime = 16 usec | |
671 | * 802.11g - 19.8.4: aSIFSTime = 10 usec + | |
672 | * signal ext = 6 usec | |
673 | */ | |
674 | /* FIX: Atheros Turbo may have different (shorter) duration? */ | |
675 | dur = 16; /* SIFS + signal ext */ | |
676 | dur += 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */ | |
677 | dur += 4; /* 17.3.2.3: T_SIGNAL = 4 usec */ | |
678 | dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10, | |
679 | 4 * rate); /* T_SYM x N_SYM */ | |
680 | } else { | |
681 | /* | |
682 | * 802.11b or 802.11g with 802.11b compatibility: | |
683 | * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime + | |
684 | * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0. | |
685 | * | |
686 | * 802.11 (DS): 15.3.3, 802.11b: 18.3.4 | |
687 | * aSIFSTime = 10 usec | |
688 | * aPreambleLength = 144 usec or 72 usec with short preamble | |
689 | * aPLCPHeaderLength = 48 usec or 24 usec with short preamble | |
690 | */ | |
691 | dur = 10; /* aSIFSTime = 10 usec */ | |
692 | dur += short_preamble ? (72 + 24) : (144 + 48); | |
693 | ||
694 | dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate); | |
695 | } | |
696 | ||
697 | return dur; | |
698 | } | |
699 | ||
700 | ||
701 | /* Exported duration function for driver use */ | |
702 | __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, | |
703 | size_t frame_len, int rate) | |
704 | { | |
705 | struct ieee80211_local *local = hw_to_local(hw); | |
706 | u16 dur; | |
707 | int erp; | |
708 | ||
709 | erp = ieee80211_is_erp_rate(hw->conf.phymode, rate); | |
710 | dur = ieee80211_frame_duration(local, frame_len, rate, | |
711 | erp, local->short_preamble); | |
712 | ||
713 | return cpu_to_le16(dur); | |
714 | } | |
715 | EXPORT_SYMBOL(ieee80211_generic_frame_duration); | |
716 | ||
717 | ||
718 | static u16 ieee80211_duration(struct ieee80211_txrx_data *tx, int group_addr, | |
719 | int next_frag_len) | |
720 | { | |
721 | int rate, mrate, erp, dur, i; | |
722 | struct ieee80211_rate *txrate = tx->u.tx.rate; | |
723 | struct ieee80211_local *local = tx->local; | |
724 | struct ieee80211_hw_mode *mode = tx->u.tx.mode; | |
725 | ||
726 | erp = txrate->flags & IEEE80211_RATE_ERP; | |
727 | ||
728 | /* | |
729 | * data and mgmt (except PS Poll): | |
730 | * - during CFP: 32768 | |
731 | * - during contention period: | |
732 | * if addr1 is group address: 0 | |
733 | * if more fragments = 0 and addr1 is individual address: time to | |
734 | * transmit one ACK plus SIFS | |
735 | * if more fragments = 1 and addr1 is individual address: time to | |
736 | * transmit next fragment plus 2 x ACK plus 3 x SIFS | |
737 | * | |
738 | * IEEE 802.11, 9.6: | |
739 | * - control response frame (CTS or ACK) shall be transmitted using the | |
740 | * same rate as the immediately previous frame in the frame exchange | |
741 | * sequence, if this rate belongs to the PHY mandatory rates, or else | |
742 | * at the highest possible rate belonging to the PHY rates in the | |
743 | * BSSBasicRateSet | |
744 | */ | |
745 | ||
746 | if ((tx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL) { | |
747 | /* TODO: These control frames are not currently sent by | |
748 | * 80211.o, but should they be implemented, this function | |
749 | * needs to be updated to support duration field calculation. | |
750 | * | |
751 | * RTS: time needed to transmit pending data/mgmt frame plus | |
752 | * one CTS frame plus one ACK frame plus 3 x SIFS | |
753 | * CTS: duration of immediately previous RTS minus time | |
754 | * required to transmit CTS and its SIFS | |
755 | * ACK: 0 if immediately previous directed data/mgmt had | |
756 | * more=0, with more=1 duration in ACK frame is duration | |
757 | * from previous frame minus time needed to transmit ACK | |
758 | * and its SIFS | |
759 | * PS Poll: BIT(15) | BIT(14) | aid | |
760 | */ | |
761 | return 0; | |
762 | } | |
763 | ||
764 | /* data/mgmt */ | |
765 | if (0 /* FIX: data/mgmt during CFP */) | |
766 | return 32768; | |
767 | ||
768 | if (group_addr) /* Group address as the destination - no ACK */ | |
769 | return 0; | |
770 | ||
771 | /* Individual destination address: | |
772 | * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes) | |
773 | * CTS and ACK frames shall be transmitted using the highest rate in | |
774 | * basic rate set that is less than or equal to the rate of the | |
775 | * immediately previous frame and that is using the same modulation | |
776 | * (CCK or OFDM). If no basic rate set matches with these requirements, | |
777 | * the highest mandatory rate of the PHY that is less than or equal to | |
778 | * the rate of the previous frame is used. | |
779 | * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps | |
780 | */ | |
781 | rate = -1; | |
782 | mrate = 10; /* use 1 Mbps if everything fails */ | |
783 | for (i = 0; i < mode->num_rates; i++) { | |
784 | struct ieee80211_rate *r = &mode->rates[i]; | |
785 | if (r->rate > txrate->rate) | |
786 | break; | |
787 | ||
788 | if (IEEE80211_RATE_MODULATION(txrate->flags) != | |
789 | IEEE80211_RATE_MODULATION(r->flags)) | |
790 | continue; | |
791 | ||
792 | if (r->flags & IEEE80211_RATE_BASIC) | |
793 | rate = r->rate; | |
794 | else if (r->flags & IEEE80211_RATE_MANDATORY) | |
795 | mrate = r->rate; | |
796 | } | |
797 | if (rate == -1) { | |
798 | /* No matching basic rate found; use highest suitable mandatory | |
799 | * PHY rate */ | |
800 | rate = mrate; | |
801 | } | |
802 | ||
803 | /* Time needed to transmit ACK | |
804 | * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up | |
805 | * to closest integer */ | |
806 | ||
807 | dur = ieee80211_frame_duration(local, 10, rate, erp, | |
808 | local->short_preamble); | |
809 | ||
810 | if (next_frag_len) { | |
811 | /* Frame is fragmented: duration increases with time needed to | |
812 | * transmit next fragment plus ACK and 2 x SIFS. */ | |
813 | dur *= 2; /* ACK + SIFS */ | |
814 | /* next fragment */ | |
815 | dur += ieee80211_frame_duration(local, next_frag_len, | |
816 | txrate->rate, erp, | |
817 | local->short_preamble); | |
818 | } | |
819 | ||
820 | return dur; | |
821 | } | |
822 | ||
823 | ||
824 | static ieee80211_txrx_result | |
825 | ieee80211_tx_h_misc(struct ieee80211_txrx_data *tx) | |
826 | { | |
827 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data; | |
828 | u16 dur; | |
829 | struct ieee80211_tx_control *control = tx->u.tx.control; | |
830 | struct ieee80211_hw_mode *mode = tx->u.tx.mode; | |
831 | ||
832 | if (!is_multicast_ether_addr(hdr->addr1)) { | |
833 | if (tx->skb->len + FCS_LEN > tx->local->rts_threshold && | |
834 | tx->local->rts_threshold < IEEE80211_MAX_RTS_THRESHOLD) { | |
835 | control->flags |= IEEE80211_TXCTL_USE_RTS_CTS; | |
836 | control->retry_limit = | |
837 | tx->local->long_retry_limit; | |
838 | } else { | |
839 | control->retry_limit = | |
840 | tx->local->short_retry_limit; | |
841 | } | |
842 | } else { | |
843 | control->retry_limit = 1; | |
844 | } | |
845 | ||
846 | if (tx->fragmented) { | |
847 | /* Do not use multiple retry rates when sending fragmented | |
848 | * frames. | |
849 | * TODO: The last fragment could still use multiple retry | |
850 | * rates. */ | |
851 | control->alt_retry_rate = -1; | |
852 | } | |
853 | ||
854 | /* Use CTS protection for unicast frames sent using extended rates if | |
855 | * there are associated non-ERP stations and RTS/CTS is not configured | |
856 | * for the frame. */ | |
857 | if (mode->mode == MODE_IEEE80211G && | |
858 | (tx->u.tx.rate->flags & IEEE80211_RATE_ERP) && | |
859 | tx->u.tx.unicast && | |
860 | tx->local->cts_protect_erp_frames && | |
861 | !(control->flags & IEEE80211_TXCTL_USE_RTS_CTS)) | |
862 | control->flags |= IEEE80211_TXCTL_USE_CTS_PROTECT; | |
863 | ||
864 | /* Setup duration field for the first fragment of the frame. Duration | |
865 | * for remaining fragments will be updated when they are being sent | |
866 | * to low-level driver in ieee80211_tx(). */ | |
867 | dur = ieee80211_duration(tx, is_multicast_ether_addr(hdr->addr1), | |
868 | tx->fragmented ? tx->u.tx.extra_frag[0]->len : | |
869 | 0); | |
870 | hdr->duration_id = cpu_to_le16(dur); | |
871 | ||
872 | if ((control->flags & IEEE80211_TXCTL_USE_RTS_CTS) || | |
873 | (control->flags & IEEE80211_TXCTL_USE_CTS_PROTECT)) { | |
874 | struct ieee80211_rate *rate; | |
875 | ||
876 | /* Do not use multiple retry rates when using RTS/CTS */ | |
877 | control->alt_retry_rate = -1; | |
878 | ||
879 | /* Use min(data rate, max base rate) as CTS/RTS rate */ | |
880 | rate = tx->u.tx.rate; | |
881 | while (rate > mode->rates && | |
882 | !(rate->flags & IEEE80211_RATE_BASIC)) | |
883 | rate--; | |
884 | ||
885 | control->rts_cts_rate = rate->val; | |
886 | control->rts_rate = rate; | |
887 | } | |
888 | ||
889 | if (tx->sta) { | |
890 | tx->sta->tx_packets++; | |
891 | tx->sta->tx_fragments++; | |
892 | tx->sta->tx_bytes += tx->skb->len; | |
893 | if (tx->u.tx.extra_frag) { | |
894 | int i; | |
895 | tx->sta->tx_fragments += tx->u.tx.num_extra_frag; | |
896 | for (i = 0; i < tx->u.tx.num_extra_frag; i++) { | |
897 | tx->sta->tx_bytes += | |
898 | tx->u.tx.extra_frag[i]->len; | |
899 | } | |
900 | } | |
901 | } | |
902 | ||
903 | return TXRX_CONTINUE; | |
904 | } | |
905 | ||
906 | ||
907 | static ieee80211_txrx_result | |
908 | ieee80211_tx_h_check_assoc(struct ieee80211_txrx_data *tx) | |
909 | { | |
910 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
911 | struct sk_buff *skb = tx->skb; | |
912 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
913 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ | |
914 | u32 sta_flags; | |
915 | ||
916 | if (unlikely(tx->local->sta_scanning != 0) && | |
917 | ((tx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT || | |
918 | (tx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_PROBE_REQ)) | |
919 | return TXRX_DROP; | |
920 | ||
921 | if (tx->u.tx.ps_buffered) | |
922 | return TXRX_CONTINUE; | |
923 | ||
924 | sta_flags = tx->sta ? tx->sta->flags : 0; | |
925 | ||
926 | if (likely(tx->u.tx.unicast)) { | |
927 | if (unlikely(!(sta_flags & WLAN_STA_ASSOC) && | |
928 | tx->sdata->type != IEEE80211_IF_TYPE_IBSS && | |
929 | (tx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA)) { | |
930 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
931 | printk(KERN_DEBUG "%s: dropped data frame to not " | |
932 | "associated station " MAC_FMT "\n", | |
933 | tx->dev->name, MAC_ARG(hdr->addr1)); | |
934 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ | |
935 | I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc); | |
936 | return TXRX_DROP; | |
937 | } | |
938 | } else { | |
939 | if (unlikely((tx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA && | |
940 | tx->local->num_sta == 0 && | |
941 | !tx->local->allow_broadcast_always && | |
942 | tx->sdata->type != IEEE80211_IF_TYPE_IBSS)) { | |
943 | /* | |
944 | * No associated STAs - no need to send multicast | |
945 | * frames. | |
946 | */ | |
947 | return TXRX_DROP; | |
948 | } | |
949 | return TXRX_CONTINUE; | |
950 | } | |
951 | ||
952 | if (unlikely(!tx->u.tx.mgmt_interface && tx->sdata->ieee802_1x && | |
953 | !(sta_flags & WLAN_STA_AUTHORIZED))) { | |
954 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
955 | printk(KERN_DEBUG "%s: dropped frame to " MAC_FMT | |
956 | " (unauthorized port)\n", tx->dev->name, | |
957 | MAC_ARG(hdr->addr1)); | |
958 | #endif | |
959 | I802_DEBUG_INC(tx->local->tx_handlers_drop_unauth_port); | |
960 | return TXRX_DROP; | |
961 | } | |
962 | ||
963 | return TXRX_CONTINUE; | |
964 | } | |
965 | ||
966 | static ieee80211_txrx_result | |
967 | ieee80211_tx_h_sequence(struct ieee80211_txrx_data *tx) | |
968 | { | |
969 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; | |
970 | ||
971 | if (ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_control)) >= 24) | |
972 | ieee80211_include_sequence(tx->sdata, hdr); | |
973 | ||
974 | return TXRX_CONTINUE; | |
975 | } | |
976 | ||
977 | /* This function is called whenever the AP is about to exceed the maximum limit | |
978 | * of buffered frames for power saving STAs. This situation should not really | |
979 | * happen often during normal operation, so dropping the oldest buffered packet | |
980 | * from each queue should be OK to make some room for new frames. */ | |
981 | static void purge_old_ps_buffers(struct ieee80211_local *local) | |
982 | { | |
983 | int total = 0, purged = 0; | |
984 | struct sk_buff *skb; | |
985 | struct ieee80211_sub_if_data *sdata; | |
986 | struct sta_info *sta; | |
987 | ||
988 | read_lock(&local->sub_if_lock); | |
989 | list_for_each_entry(sdata, &local->sub_if_list, list) { | |
990 | struct ieee80211_if_ap *ap; | |
991 | if (sdata->dev == local->mdev || | |
992 | sdata->type != IEEE80211_IF_TYPE_AP) | |
993 | continue; | |
994 | ap = &sdata->u.ap; | |
995 | skb = skb_dequeue(&ap->ps_bc_buf); | |
996 | if (skb) { | |
997 | purged++; | |
998 | dev_kfree_skb(skb); | |
999 | } | |
1000 | total += skb_queue_len(&ap->ps_bc_buf); | |
1001 | } | |
1002 | read_unlock(&local->sub_if_lock); | |
1003 | ||
1004 | spin_lock_bh(&local->sta_lock); | |
1005 | list_for_each_entry(sta, &local->sta_list, list) { | |
1006 | skb = skb_dequeue(&sta->ps_tx_buf); | |
1007 | if (skb) { | |
1008 | purged++; | |
1009 | dev_kfree_skb(skb); | |
1010 | } | |
1011 | total += skb_queue_len(&sta->ps_tx_buf); | |
1012 | } | |
1013 | spin_unlock_bh(&local->sta_lock); | |
1014 | ||
1015 | local->total_ps_buffered = total; | |
1016 | printk(KERN_DEBUG "%s: PS buffers full - purged %d frames\n", | |
1017 | local->mdev->name, purged); | |
1018 | } | |
1019 | ||
1020 | ||
1021 | static inline ieee80211_txrx_result | |
1022 | ieee80211_tx_h_multicast_ps_buf(struct ieee80211_txrx_data *tx) | |
1023 | { | |
1024 | /* broadcast/multicast frame */ | |
1025 | /* If any of the associated stations is in power save mode, | |
1026 | * the frame is buffered to be sent after DTIM beacon frame */ | |
1027 | if ((tx->local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING) && | |
1028 | tx->sdata->type != IEEE80211_IF_TYPE_WDS && | |
1029 | tx->sdata->bss && atomic_read(&tx->sdata->bss->num_sta_ps) && | |
1030 | !(tx->fc & IEEE80211_FCTL_ORDER)) { | |
1031 | if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER) | |
1032 | purge_old_ps_buffers(tx->local); | |
1033 | if (skb_queue_len(&tx->sdata->bss->ps_bc_buf) >= | |
1034 | AP_MAX_BC_BUFFER) { | |
1035 | if (net_ratelimit()) { | |
1036 | printk(KERN_DEBUG "%s: BC TX buffer full - " | |
1037 | "dropping the oldest frame\n", | |
1038 | tx->dev->name); | |
1039 | } | |
1040 | dev_kfree_skb(skb_dequeue(&tx->sdata->bss->ps_bc_buf)); | |
1041 | } else | |
1042 | tx->local->total_ps_buffered++; | |
1043 | skb_queue_tail(&tx->sdata->bss->ps_bc_buf, tx->skb); | |
1044 | return TXRX_QUEUED; | |
1045 | } | |
1046 | ||
1047 | return TXRX_CONTINUE; | |
1048 | } | |
1049 | ||
1050 | ||
1051 | static inline ieee80211_txrx_result | |
1052 | ieee80211_tx_h_unicast_ps_buf(struct ieee80211_txrx_data *tx) | |
1053 | { | |
1054 | struct sta_info *sta = tx->sta; | |
1055 | ||
1056 | if (unlikely(!sta || | |
1057 | ((tx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT && | |
1058 | (tx->fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP))) | |
1059 | return TXRX_CONTINUE; | |
1060 | ||
1061 | if (unlikely((sta->flags & WLAN_STA_PS) && !sta->pspoll)) { | |
1062 | struct ieee80211_tx_packet_data *pkt_data; | |
1063 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG | |
1064 | printk(KERN_DEBUG "STA " MAC_FMT " aid %d: PS buffer (entries " | |
1065 | "before %d)\n", | |
1066 | MAC_ARG(sta->addr), sta->aid, | |
1067 | skb_queue_len(&sta->ps_tx_buf)); | |
1068 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ | |
1069 | sta->flags |= WLAN_STA_TIM; | |
1070 | if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER) | |
1071 | purge_old_ps_buffers(tx->local); | |
1072 | if (skb_queue_len(&sta->ps_tx_buf) >= STA_MAX_TX_BUFFER) { | |
1073 | struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf); | |
1074 | if (net_ratelimit()) { | |
1075 | printk(KERN_DEBUG "%s: STA " MAC_FMT " TX " | |
1076 | "buffer full - dropping oldest frame\n", | |
1077 | tx->dev->name, MAC_ARG(sta->addr)); | |
1078 | } | |
1079 | dev_kfree_skb(old); | |
1080 | } else | |
1081 | tx->local->total_ps_buffered++; | |
1082 | /* Queue frame to be sent after STA sends an PS Poll frame */ | |
1083 | if (skb_queue_empty(&sta->ps_tx_buf)) { | |
1084 | if (tx->local->ops->set_tim) | |
1085 | tx->local->ops->set_tim(local_to_hw(tx->local), | |
1086 | sta->aid, 1); | |
1087 | if (tx->sdata->bss) | |
1088 | bss_tim_set(tx->local, tx->sdata->bss, sta->aid); | |
1089 | } | |
1090 | pkt_data = (struct ieee80211_tx_packet_data *)tx->skb->cb; | |
1091 | pkt_data->jiffies = jiffies; | |
1092 | skb_queue_tail(&sta->ps_tx_buf, tx->skb); | |
1093 | return TXRX_QUEUED; | |
1094 | } | |
1095 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG | |
1096 | else if (unlikely(sta->flags & WLAN_STA_PS)) { | |
1097 | printk(KERN_DEBUG "%s: STA " MAC_FMT " in PS mode, but pspoll " | |
1098 | "set -> send frame\n", tx->dev->name, | |
1099 | MAC_ARG(sta->addr)); | |
1100 | } | |
1101 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ | |
1102 | sta->pspoll = 0; | |
1103 | ||
1104 | return TXRX_CONTINUE; | |
1105 | } | |
1106 | ||
1107 | ||
1108 | static ieee80211_txrx_result | |
1109 | ieee80211_tx_h_ps_buf(struct ieee80211_txrx_data *tx) | |
1110 | { | |
1111 | if (unlikely(tx->u.tx.ps_buffered)) | |
1112 | return TXRX_CONTINUE; | |
1113 | ||
1114 | if (tx->u.tx.unicast) | |
1115 | return ieee80211_tx_h_unicast_ps_buf(tx); | |
1116 | else | |
1117 | return ieee80211_tx_h_multicast_ps_buf(tx); | |
1118 | } | |
1119 | ||
1120 | ||
1121 | static void inline | |
1122 | __ieee80211_tx_prepare(struct ieee80211_txrx_data *tx, | |
1123 | struct sk_buff *skb, | |
1124 | struct net_device *dev, | |
1125 | struct ieee80211_tx_control *control) | |
1126 | { | |
1127 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1128 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
1129 | int hdrlen; | |
1130 | ||
1131 | memset(tx, 0, sizeof(*tx)); | |
1132 | tx->skb = skb; | |
1133 | tx->dev = dev; /* use original interface */ | |
1134 | tx->local = local; | |
1135 | tx->sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1136 | tx->sta = sta_info_get(local, hdr->addr1); | |
1137 | tx->fc = le16_to_cpu(hdr->frame_control); | |
1138 | control->power_level = local->hw.conf.power_level; | |
1139 | tx->u.tx.control = control; | |
1140 | tx->u.tx.unicast = !is_multicast_ether_addr(hdr->addr1); | |
1141 | if (is_multicast_ether_addr(hdr->addr1)) | |
1142 | control->flags |= IEEE80211_TXCTL_NO_ACK; | |
1143 | else | |
1144 | control->flags &= ~IEEE80211_TXCTL_NO_ACK; | |
1145 | tx->fragmented = local->fragmentation_threshold < | |
1146 | IEEE80211_MAX_FRAG_THRESHOLD && tx->u.tx.unicast && | |
1147 | skb->len + FCS_LEN > local->fragmentation_threshold && | |
1148 | (!local->ops->set_frag_threshold); | |
1149 | if (!tx->sta) | |
1150 | control->flags |= IEEE80211_TXCTL_CLEAR_DST_MASK; | |
1151 | else if (tx->sta->clear_dst_mask) { | |
1152 | control->flags |= IEEE80211_TXCTL_CLEAR_DST_MASK; | |
1153 | tx->sta->clear_dst_mask = 0; | |
1154 | } | |
1155 | control->antenna_sel_tx = local->hw.conf.antenna_sel_tx; | |
1156 | if (local->sta_antenna_sel != STA_ANTENNA_SEL_AUTO && tx->sta) | |
1157 | control->antenna_sel_tx = tx->sta->antenna_sel_tx; | |
1158 | hdrlen = ieee80211_get_hdrlen(tx->fc); | |
1159 | if (skb->len > hdrlen + sizeof(rfc1042_header) + 2) { | |
1160 | u8 *pos = &skb->data[hdrlen + sizeof(rfc1042_header)]; | |
1161 | tx->ethertype = (pos[0] << 8) | pos[1]; | |
1162 | } | |
1163 | control->flags |= IEEE80211_TXCTL_FIRST_FRAGMENT; | |
1164 | ||
1165 | } | |
1166 | ||
1167 | static int inline is_ieee80211_device(struct net_device *dev, | |
1168 | struct net_device *master) | |
1169 | { | |
1170 | return (wdev_priv(dev->ieee80211_ptr) == | |
1171 | wdev_priv(master->ieee80211_ptr)); | |
1172 | } | |
1173 | ||
1174 | /* Device in tx->dev has a reference added; use dev_put(tx->dev) when | |
1175 | * finished with it. */ | |
1176 | static int inline ieee80211_tx_prepare(struct ieee80211_txrx_data *tx, | |
1177 | struct sk_buff *skb, | |
1178 | struct net_device *mdev, | |
1179 | struct ieee80211_tx_control *control) | |
1180 | { | |
1181 | struct ieee80211_tx_packet_data *pkt_data; | |
1182 | struct net_device *dev; | |
1183 | ||
1184 | pkt_data = (struct ieee80211_tx_packet_data *)skb->cb; | |
1185 | dev = dev_get_by_index(pkt_data->ifindex); | |
1186 | if (unlikely(dev && !is_ieee80211_device(dev, mdev))) { | |
1187 | dev_put(dev); | |
1188 | dev = NULL; | |
1189 | } | |
1190 | if (unlikely(!dev)) | |
1191 | return -ENODEV; | |
1192 | __ieee80211_tx_prepare(tx, skb, dev, control); | |
1193 | return 0; | |
1194 | } | |
1195 | ||
1196 | static inline int __ieee80211_queue_stopped(const struct ieee80211_local *local, | |
1197 | int queue) | |
1198 | { | |
1199 | return test_bit(IEEE80211_LINK_STATE_XOFF, &local->state[queue]); | |
1200 | } | |
1201 | ||
1202 | static inline int __ieee80211_queue_pending(const struct ieee80211_local *local, | |
1203 | int queue) | |
1204 | { | |
1205 | return test_bit(IEEE80211_LINK_STATE_PENDING, &local->state[queue]); | |
1206 | } | |
1207 | ||
1208 | #define IEEE80211_TX_OK 0 | |
1209 | #define IEEE80211_TX_AGAIN 1 | |
1210 | #define IEEE80211_TX_FRAG_AGAIN 2 | |
1211 | ||
1212 | static int __ieee80211_tx(struct ieee80211_local *local, struct sk_buff *skb, | |
1213 | struct ieee80211_txrx_data *tx) | |
1214 | { | |
1215 | struct ieee80211_tx_control *control = tx->u.tx.control; | |
1216 | int ret, i; | |
1217 | ||
1218 | if (!ieee80211_qdisc_installed(local->mdev) && | |
1219 | __ieee80211_queue_stopped(local, 0)) { | |
1220 | netif_stop_queue(local->mdev); | |
1221 | return IEEE80211_TX_AGAIN; | |
1222 | } | |
1223 | if (skb) { | |
1224 | ieee80211_dump_frame(local->mdev->name, "TX to low-level driver", skb); | |
1225 | ret = local->ops->tx(local_to_hw(local), skb, control); | |
1226 | if (ret) | |
1227 | return IEEE80211_TX_AGAIN; | |
1228 | local->mdev->trans_start = jiffies; | |
1229 | ieee80211_led_tx(local, 1); | |
1230 | } | |
1231 | if (tx->u.tx.extra_frag) { | |
1232 | control->flags &= ~(IEEE80211_TXCTL_USE_RTS_CTS | | |
1233 | IEEE80211_TXCTL_USE_CTS_PROTECT | | |
1234 | IEEE80211_TXCTL_CLEAR_DST_MASK | | |
1235 | IEEE80211_TXCTL_FIRST_FRAGMENT); | |
1236 | for (i = 0; i < tx->u.tx.num_extra_frag; i++) { | |
1237 | if (!tx->u.tx.extra_frag[i]) | |
1238 | continue; | |
1239 | if (__ieee80211_queue_stopped(local, control->queue)) | |
1240 | return IEEE80211_TX_FRAG_AGAIN; | |
1241 | if (i == tx->u.tx.num_extra_frag) { | |
1242 | control->tx_rate = tx->u.tx.last_frag_hwrate; | |
1243 | control->rate = tx->u.tx.last_frag_rate; | |
1244 | if (tx->u.tx.probe_last_frag) | |
1245 | control->flags |= | |
1246 | IEEE80211_TXCTL_RATE_CTRL_PROBE; | |
1247 | else | |
1248 | control->flags &= | |
1249 | ~IEEE80211_TXCTL_RATE_CTRL_PROBE; | |
1250 | } | |
1251 | ||
1252 | ieee80211_dump_frame(local->mdev->name, | |
1253 | "TX to low-level driver", | |
1254 | tx->u.tx.extra_frag[i]); | |
1255 | ret = local->ops->tx(local_to_hw(local), | |
1256 | tx->u.tx.extra_frag[i], | |
1257 | control); | |
1258 | if (ret) | |
1259 | return IEEE80211_TX_FRAG_AGAIN; | |
1260 | local->mdev->trans_start = jiffies; | |
1261 | ieee80211_led_tx(local, 1); | |
1262 | tx->u.tx.extra_frag[i] = NULL; | |
1263 | } | |
1264 | kfree(tx->u.tx.extra_frag); | |
1265 | tx->u.tx.extra_frag = NULL; | |
1266 | } | |
1267 | return IEEE80211_TX_OK; | |
1268 | } | |
1269 | ||
1270 | static int ieee80211_tx(struct net_device *dev, struct sk_buff *skb, | |
1271 | struct ieee80211_tx_control *control, int mgmt) | |
1272 | { | |
1273 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1274 | struct sta_info *sta; | |
1275 | ieee80211_tx_handler *handler; | |
1276 | struct ieee80211_txrx_data tx; | |
1277 | ieee80211_txrx_result res = TXRX_DROP; | |
1278 | int ret, i; | |
1279 | ||
1280 | WARN_ON(__ieee80211_queue_pending(local, control->queue)); | |
1281 | ||
1282 | if (unlikely(skb->len < 10)) { | |
1283 | dev_kfree_skb(skb); | |
1284 | return 0; | |
1285 | } | |
1286 | ||
1287 | __ieee80211_tx_prepare(&tx, skb, dev, control); | |
1288 | sta = tx.sta; | |
1289 | tx.u.tx.mgmt_interface = mgmt; | |
1290 | tx.u.tx.mode = local->hw.conf.mode; | |
1291 | ||
1292 | for (handler = local->tx_handlers; *handler != NULL; handler++) { | |
1293 | res = (*handler)(&tx); | |
1294 | if (res != TXRX_CONTINUE) | |
1295 | break; | |
1296 | } | |
1297 | ||
1298 | skb = tx.skb; /* handlers are allowed to change skb */ | |
1299 | ||
1300 | if (sta) | |
1301 | sta_info_put(sta); | |
1302 | ||
1303 | if (unlikely(res == TXRX_DROP)) { | |
1304 | I802_DEBUG_INC(local->tx_handlers_drop); | |
1305 | goto drop; | |
1306 | } | |
1307 | ||
1308 | if (unlikely(res == TXRX_QUEUED)) { | |
1309 | I802_DEBUG_INC(local->tx_handlers_queued); | |
1310 | return 0; | |
1311 | } | |
1312 | ||
1313 | if (tx.u.tx.extra_frag) { | |
1314 | for (i = 0; i < tx.u.tx.num_extra_frag; i++) { | |
1315 | int next_len, dur; | |
1316 | struct ieee80211_hdr *hdr = | |
1317 | (struct ieee80211_hdr *) | |
1318 | tx.u.tx.extra_frag[i]->data; | |
1319 | ||
1320 | if (i + 1 < tx.u.tx.num_extra_frag) { | |
1321 | next_len = tx.u.tx.extra_frag[i + 1]->len; | |
1322 | } else { | |
1323 | next_len = 0; | |
1324 | tx.u.tx.rate = tx.u.tx.last_frag_rate; | |
1325 | tx.u.tx.last_frag_hwrate = tx.u.tx.rate->val; | |
1326 | } | |
1327 | dur = ieee80211_duration(&tx, 0, next_len); | |
1328 | hdr->duration_id = cpu_to_le16(dur); | |
1329 | } | |
1330 | } | |
1331 | ||
1332 | retry: | |
1333 | ret = __ieee80211_tx(local, skb, &tx); | |
1334 | if (ret) { | |
1335 | struct ieee80211_tx_stored_packet *store = | |
1336 | &local->pending_packet[control->queue]; | |
1337 | ||
1338 | if (ret == IEEE80211_TX_FRAG_AGAIN) | |
1339 | skb = NULL; | |
1340 | set_bit(IEEE80211_LINK_STATE_PENDING, | |
1341 | &local->state[control->queue]); | |
1342 | smp_mb(); | |
1343 | /* When the driver gets out of buffers during sending of | |
1344 | * fragments and calls ieee80211_stop_queue, there is | |
1345 | * a small window between IEEE80211_LINK_STATE_XOFF and | |
1346 | * IEEE80211_LINK_STATE_PENDING flags are set. If a buffer | |
1347 | * gets available in that window (i.e. driver calls | |
1348 | * ieee80211_wake_queue), we would end up with ieee80211_tx | |
1349 | * called with IEEE80211_LINK_STATE_PENDING. Prevent this by | |
1350 | * continuing transmitting here when that situation is | |
1351 | * possible to have happened. */ | |
1352 | if (!__ieee80211_queue_stopped(local, control->queue)) { | |
1353 | clear_bit(IEEE80211_LINK_STATE_PENDING, | |
1354 | &local->state[control->queue]); | |
1355 | goto retry; | |
1356 | } | |
1357 | memcpy(&store->control, control, | |
1358 | sizeof(struct ieee80211_tx_control)); | |
1359 | store->skb = skb; | |
1360 | store->extra_frag = tx.u.tx.extra_frag; | |
1361 | store->num_extra_frag = tx.u.tx.num_extra_frag; | |
1362 | store->last_frag_hwrate = tx.u.tx.last_frag_hwrate; | |
1363 | store->last_frag_rate = tx.u.tx.last_frag_rate; | |
1364 | store->last_frag_rate_ctrl_probe = tx.u.tx.probe_last_frag; | |
1365 | } | |
1366 | return 0; | |
1367 | ||
1368 | drop: | |
1369 | if (skb) | |
1370 | dev_kfree_skb(skb); | |
1371 | for (i = 0; i < tx.u.tx.num_extra_frag; i++) | |
1372 | if (tx.u.tx.extra_frag[i]) | |
1373 | dev_kfree_skb(tx.u.tx.extra_frag[i]); | |
1374 | kfree(tx.u.tx.extra_frag); | |
1375 | return 0; | |
1376 | } | |
1377 | ||
1378 | static void ieee80211_tx_pending(unsigned long data) | |
1379 | { | |
1380 | struct ieee80211_local *local = (struct ieee80211_local *)data; | |
1381 | struct net_device *dev = local->mdev; | |
1382 | struct ieee80211_tx_stored_packet *store; | |
1383 | struct ieee80211_txrx_data tx; | |
1384 | int i, ret, reschedule = 0; | |
1385 | ||
1386 | netif_tx_lock_bh(dev); | |
1387 | for (i = 0; i < local->hw.queues; i++) { | |
1388 | if (__ieee80211_queue_stopped(local, i)) | |
1389 | continue; | |
1390 | if (!__ieee80211_queue_pending(local, i)) { | |
1391 | reschedule = 1; | |
1392 | continue; | |
1393 | } | |
1394 | store = &local->pending_packet[i]; | |
1395 | tx.u.tx.control = &store->control; | |
1396 | tx.u.tx.extra_frag = store->extra_frag; | |
1397 | tx.u.tx.num_extra_frag = store->num_extra_frag; | |
1398 | tx.u.tx.last_frag_hwrate = store->last_frag_hwrate; | |
1399 | tx.u.tx.last_frag_rate = store->last_frag_rate; | |
1400 | tx.u.tx.probe_last_frag = store->last_frag_rate_ctrl_probe; | |
1401 | ret = __ieee80211_tx(local, store->skb, &tx); | |
1402 | if (ret) { | |
1403 | if (ret == IEEE80211_TX_FRAG_AGAIN) | |
1404 | store->skb = NULL; | |
1405 | } else { | |
1406 | clear_bit(IEEE80211_LINK_STATE_PENDING, | |
1407 | &local->state[i]); | |
1408 | reschedule = 1; | |
1409 | } | |
1410 | } | |
1411 | netif_tx_unlock_bh(dev); | |
1412 | if (reschedule) { | |
1413 | if (!ieee80211_qdisc_installed(dev)) { | |
1414 | if (!__ieee80211_queue_stopped(local, 0)) | |
1415 | netif_wake_queue(dev); | |
1416 | } else | |
1417 | netif_schedule(dev); | |
1418 | } | |
1419 | } | |
1420 | ||
1421 | static void ieee80211_clear_tx_pending(struct ieee80211_local *local) | |
1422 | { | |
1423 | int i, j; | |
1424 | struct ieee80211_tx_stored_packet *store; | |
1425 | ||
1426 | for (i = 0; i < local->hw.queues; i++) { | |
1427 | if (!__ieee80211_queue_pending(local, i)) | |
1428 | continue; | |
1429 | store = &local->pending_packet[i]; | |
1430 | kfree_skb(store->skb); | |
1431 | for (j = 0; j < store->num_extra_frag; j++) | |
1432 | kfree_skb(store->extra_frag[j]); | |
1433 | kfree(store->extra_frag); | |
1434 | clear_bit(IEEE80211_LINK_STATE_PENDING, &local->state[i]); | |
1435 | } | |
1436 | } | |
1437 | ||
1438 | static int ieee80211_master_start_xmit(struct sk_buff *skb, | |
1439 | struct net_device *dev) | |
1440 | { | |
1441 | struct ieee80211_tx_control control; | |
1442 | struct ieee80211_tx_packet_data *pkt_data; | |
1443 | struct net_device *odev = NULL; | |
1444 | struct ieee80211_sub_if_data *osdata; | |
1445 | int headroom; | |
1446 | int ret; | |
1447 | ||
1448 | /* | |
1449 | * copy control out of the skb so other people can use skb->cb | |
1450 | */ | |
1451 | pkt_data = (struct ieee80211_tx_packet_data *)skb->cb; | |
1452 | memset(&control, 0, sizeof(struct ieee80211_tx_control)); | |
1453 | ||
1454 | if (pkt_data->ifindex) | |
1455 | odev = dev_get_by_index(pkt_data->ifindex); | |
1456 | if (unlikely(odev && !is_ieee80211_device(odev, dev))) { | |
1457 | dev_put(odev); | |
1458 | odev = NULL; | |
1459 | } | |
1460 | if (unlikely(!odev)) { | |
1461 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
1462 | printk(KERN_DEBUG "%s: Discarded packet with nonexistent " | |
1463 | "originating device\n", dev->name); | |
1464 | #endif | |
1465 | dev_kfree_skb(skb); | |
1466 | return 0; | |
1467 | } | |
1468 | osdata = IEEE80211_DEV_TO_SUB_IF(odev); | |
1469 | ||
1470 | headroom = osdata->local->hw.extra_tx_headroom + | |
1471 | IEEE80211_ENCRYPT_HEADROOM; | |
1472 | if (skb_headroom(skb) < headroom) { | |
1473 | if (pskb_expand_head(skb, headroom, 0, GFP_ATOMIC)) { | |
1474 | dev_kfree_skb(skb); | |
1475 | return 0; | |
1476 | } | |
1477 | } | |
1478 | ||
1479 | control.ifindex = odev->ifindex; | |
1480 | control.type = osdata->type; | |
1481 | if (pkt_data->req_tx_status) | |
1482 | control.flags |= IEEE80211_TXCTL_REQ_TX_STATUS; | |
1483 | if (pkt_data->do_not_encrypt) | |
1484 | control.flags |= IEEE80211_TXCTL_DO_NOT_ENCRYPT; | |
1485 | if (pkt_data->requeue) | |
1486 | control.flags |= IEEE80211_TXCTL_REQUEUE; | |
1487 | control.queue = pkt_data->queue; | |
1488 | ||
1489 | ret = ieee80211_tx(odev, skb, &control, | |
1490 | control.type == IEEE80211_IF_TYPE_MGMT); | |
1491 | dev_put(odev); | |
1492 | ||
1493 | return ret; | |
1494 | } | |
1495 | ||
1496 | ||
1497 | /** | |
1498 | * ieee80211_subif_start_xmit - netif start_xmit function for Ethernet-type | |
1499 | * subinterfaces (wlan#, WDS, and VLAN interfaces) | |
1500 | * @skb: packet to be sent | |
1501 | * @dev: incoming interface | |
1502 | * | |
1503 | * Returns: 0 on success (and frees skb in this case) or 1 on failure (skb will | |
1504 | * not be freed, and caller is responsible for either retrying later or freeing | |
1505 | * skb). | |
1506 | * | |
1507 | * This function takes in an Ethernet header and encapsulates it with suitable | |
1508 | * IEEE 802.11 header based on which interface the packet is coming in. The | |
1509 | * encapsulated packet will then be passed to master interface, wlan#.11, for | |
1510 | * transmission (through low-level driver). | |
1511 | */ | |
1512 | static int ieee80211_subif_start_xmit(struct sk_buff *skb, | |
1513 | struct net_device *dev) | |
1514 | { | |
1515 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1516 | struct ieee80211_tx_packet_data *pkt_data; | |
1517 | struct ieee80211_sub_if_data *sdata; | |
1518 | int ret = 1, head_need; | |
1519 | u16 ethertype, hdrlen, fc; | |
1520 | struct ieee80211_hdr hdr; | |
1521 | const u8 *encaps_data; | |
1522 | int encaps_len, skip_header_bytes; | |
1523 | int nh_pos, h_pos, no_encrypt = 0; | |
1524 | struct sta_info *sta; | |
1525 | ||
1526 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1527 | if (unlikely(skb->len < ETH_HLEN)) { | |
1528 | printk(KERN_DEBUG "%s: short skb (len=%d)\n", | |
1529 | dev->name, skb->len); | |
1530 | ret = 0; | |
1531 | goto fail; | |
1532 | } | |
1533 | ||
1534 | nh_pos = skb_network_header(skb) - skb->data; | |
1535 | h_pos = skb_transport_header(skb) - skb->data; | |
1536 | ||
1537 | /* convert Ethernet header to proper 802.11 header (based on | |
1538 | * operation mode) */ | |
1539 | ethertype = (skb->data[12] << 8) | skb->data[13]; | |
1540 | /* TODO: handling for 802.1x authorized/unauthorized port */ | |
1541 | fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA; | |
1542 | ||
1543 | if (likely(sdata->type == IEEE80211_IF_TYPE_AP || | |
1544 | sdata->type == IEEE80211_IF_TYPE_VLAN)) { | |
1545 | fc |= IEEE80211_FCTL_FROMDS; | |
1546 | /* DA BSSID SA */ | |
1547 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
1548 | memcpy(hdr.addr2, dev->dev_addr, ETH_ALEN); | |
1549 | memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN); | |
1550 | hdrlen = 24; | |
1551 | } else if (sdata->type == IEEE80211_IF_TYPE_WDS) { | |
1552 | fc |= IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS; | |
1553 | /* RA TA DA SA */ | |
1554 | memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN); | |
1555 | memcpy(hdr.addr2, dev->dev_addr, ETH_ALEN); | |
1556 | memcpy(hdr.addr3, skb->data, ETH_ALEN); | |
1557 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
1558 | hdrlen = 30; | |
1559 | } else if (sdata->type == IEEE80211_IF_TYPE_STA) { | |
1560 | fc |= IEEE80211_FCTL_TODS; | |
1561 | /* BSSID SA DA */ | |
1562 | memcpy(hdr.addr1, sdata->u.sta.bssid, ETH_ALEN); | |
1563 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
1564 | memcpy(hdr.addr3, skb->data, ETH_ALEN); | |
1565 | hdrlen = 24; | |
1566 | } else if (sdata->type == IEEE80211_IF_TYPE_IBSS) { | |
1567 | /* DA SA BSSID */ | |
1568 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
1569 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
1570 | memcpy(hdr.addr3, sdata->u.sta.bssid, ETH_ALEN); | |
1571 | hdrlen = 24; | |
1572 | } else { | |
1573 | ret = 0; | |
1574 | goto fail; | |
1575 | } | |
1576 | ||
1577 | /* receiver is QoS enabled, use a QoS type frame */ | |
1578 | sta = sta_info_get(local, hdr.addr1); | |
1579 | if (sta) { | |
1580 | if (sta->flags & WLAN_STA_WME) { | |
1581 | fc |= IEEE80211_STYPE_QOS_DATA; | |
1582 | hdrlen += 2; | |
1583 | } | |
1584 | sta_info_put(sta); | |
1585 | } | |
1586 | ||
1587 | hdr.frame_control = cpu_to_le16(fc); | |
1588 | hdr.duration_id = 0; | |
1589 | hdr.seq_ctrl = 0; | |
1590 | ||
1591 | skip_header_bytes = ETH_HLEN; | |
1592 | if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) { | |
1593 | encaps_data = bridge_tunnel_header; | |
1594 | encaps_len = sizeof(bridge_tunnel_header); | |
1595 | skip_header_bytes -= 2; | |
1596 | } else if (ethertype >= 0x600) { | |
1597 | encaps_data = rfc1042_header; | |
1598 | encaps_len = sizeof(rfc1042_header); | |
1599 | skip_header_bytes -= 2; | |
1600 | } else { | |
1601 | encaps_data = NULL; | |
1602 | encaps_len = 0; | |
1603 | } | |
1604 | ||
1605 | skb_pull(skb, skip_header_bytes); | |
1606 | nh_pos -= skip_header_bytes; | |
1607 | h_pos -= skip_header_bytes; | |
1608 | ||
1609 | /* TODO: implement support for fragments so that there is no need to | |
1610 | * reallocate and copy payload; it might be enough to support one | |
1611 | * extra fragment that would be copied in the beginning of the frame | |
1612 | * data.. anyway, it would be nice to include this into skb structure | |
1613 | * somehow | |
1614 | * | |
1615 | * There are few options for this: | |
1616 | * use skb->cb as an extra space for 802.11 header | |
1617 | * allocate new buffer if not enough headroom | |
1618 | * make sure that there is enough headroom in every skb by increasing | |
1619 | * build in headroom in __dev_alloc_skb() (linux/skbuff.h) and | |
1620 | * alloc_skb() (net/core/skbuff.c) | |
1621 | */ | |
1622 | head_need = hdrlen + encaps_len + local->hw.extra_tx_headroom; | |
1623 | head_need -= skb_headroom(skb); | |
1624 | ||
1625 | /* We are going to modify skb data, so make a copy of it if happens to | |
1626 | * be cloned. This could happen, e.g., with Linux bridge code passing | |
1627 | * us broadcast frames. */ | |
1628 | ||
1629 | if (head_need > 0 || skb_cloned(skb)) { | |
1630 | #if 0 | |
1631 | printk(KERN_DEBUG "%s: need to reallocate buffer for %d bytes " | |
1632 | "of headroom\n", dev->name, head_need); | |
1633 | #endif | |
1634 | ||
1635 | if (skb_cloned(skb)) | |
1636 | I802_DEBUG_INC(local->tx_expand_skb_head_cloned); | |
1637 | else | |
1638 | I802_DEBUG_INC(local->tx_expand_skb_head); | |
1639 | /* Since we have to reallocate the buffer, make sure that there | |
1640 | * is enough room for possible WEP IV/ICV and TKIP (8 bytes | |
1641 | * before payload and 12 after). */ | |
1642 | if (pskb_expand_head(skb, (head_need > 0 ? head_need + 8 : 8), | |
1643 | 12, GFP_ATOMIC)) { | |
1644 | printk(KERN_DEBUG "%s: failed to reallocate TX buffer" | |
1645 | "\n", dev->name); | |
1646 | goto fail; | |
1647 | } | |
1648 | } | |
1649 | ||
1650 | if (encaps_data) { | |
1651 | memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len); | |
1652 | nh_pos += encaps_len; | |
1653 | h_pos += encaps_len; | |
1654 | } | |
1655 | memcpy(skb_push(skb, hdrlen), &hdr, hdrlen); | |
1656 | nh_pos += hdrlen; | |
1657 | h_pos += hdrlen; | |
1658 | ||
1659 | pkt_data = (struct ieee80211_tx_packet_data *)skb->cb; | |
1660 | memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data)); | |
1661 | pkt_data->ifindex = sdata->dev->ifindex; | |
1662 | pkt_data->mgmt_iface = (sdata->type == IEEE80211_IF_TYPE_MGMT); | |
1663 | pkt_data->do_not_encrypt = no_encrypt; | |
1664 | ||
1665 | skb->dev = local->mdev; | |
1666 | sdata->stats.tx_packets++; | |
1667 | sdata->stats.tx_bytes += skb->len; | |
1668 | ||
1669 | /* Update skb pointers to various headers since this modified frame | |
1670 | * is going to go through Linux networking code that may potentially | |
1671 | * need things like pointer to IP header. */ | |
1672 | skb_set_mac_header(skb, 0); | |
1673 | skb_set_network_header(skb, nh_pos); | |
1674 | skb_set_transport_header(skb, h_pos); | |
1675 | ||
1676 | dev->trans_start = jiffies; | |
1677 | dev_queue_xmit(skb); | |
1678 | ||
1679 | return 0; | |
1680 | ||
1681 | fail: | |
1682 | if (!ret) | |
1683 | dev_kfree_skb(skb); | |
1684 | ||
1685 | return ret; | |
1686 | } | |
1687 | ||
1688 | ||
1689 | /* | |
1690 | * This is the transmit routine for the 802.11 type interfaces | |
1691 | * called by upper layers of the linux networking | |
1692 | * stack when it has a frame to transmit | |
1693 | */ | |
1694 | static int | |
1695 | ieee80211_mgmt_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
1696 | { | |
1697 | struct ieee80211_sub_if_data *sdata; | |
1698 | struct ieee80211_tx_packet_data *pkt_data; | |
1699 | struct ieee80211_hdr *hdr; | |
1700 | u16 fc; | |
1701 | ||
1702 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1703 | ||
1704 | if (skb->len < 10) { | |
1705 | dev_kfree_skb(skb); | |
1706 | return 0; | |
1707 | } | |
1708 | ||
1709 | if (skb_headroom(skb) < sdata->local->hw.extra_tx_headroom) { | |
1710 | if (pskb_expand_head(skb, | |
1711 | sdata->local->hw.extra_tx_headroom, 0, GFP_ATOMIC)) { | |
1712 | dev_kfree_skb(skb); | |
1713 | return 0; | |
1714 | } | |
1715 | } | |
1716 | ||
1717 | hdr = (struct ieee80211_hdr *) skb->data; | |
1718 | fc = le16_to_cpu(hdr->frame_control); | |
1719 | ||
1720 | pkt_data = (struct ieee80211_tx_packet_data *) skb->cb; | |
1721 | memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data)); | |
1722 | pkt_data->ifindex = sdata->dev->ifindex; | |
1723 | pkt_data->mgmt_iface = (sdata->type == IEEE80211_IF_TYPE_MGMT); | |
1724 | ||
1725 | skb->priority = 20; /* use hardcoded priority for mgmt TX queue */ | |
1726 | skb->dev = sdata->local->mdev; | |
1727 | ||
1728 | /* | |
1729 | * We're using the protocol field of the the frame control header | |
1730 | * to request TX callback for hostapd. BIT(1) is checked. | |
1731 | */ | |
1732 | if ((fc & BIT(1)) == BIT(1)) { | |
1733 | pkt_data->req_tx_status = 1; | |
1734 | fc &= ~BIT(1); | |
1735 | hdr->frame_control = cpu_to_le16(fc); | |
1736 | } | |
1737 | ||
1738 | pkt_data->do_not_encrypt = !(fc & IEEE80211_FCTL_PROTECTED); | |
1739 | ||
1740 | sdata->stats.tx_packets++; | |
1741 | sdata->stats.tx_bytes += skb->len; | |
1742 | ||
1743 | dev_queue_xmit(skb); | |
1744 | ||
1745 | return 0; | |
1746 | } | |
1747 | ||
1748 | ||
1749 | static void ieee80211_beacon_add_tim(struct ieee80211_local *local, | |
1750 | struct ieee80211_if_ap *bss, | |
1751 | struct sk_buff *skb) | |
1752 | { | |
1753 | u8 *pos, *tim; | |
1754 | int aid0 = 0; | |
1755 | int i, have_bits = 0, n1, n2; | |
1756 | ||
1757 | /* Generate bitmap for TIM only if there are any STAs in power save | |
1758 | * mode. */ | |
1759 | spin_lock_bh(&local->sta_lock); | |
1760 | if (atomic_read(&bss->num_sta_ps) > 0) | |
1761 | /* in the hope that this is faster than | |
1762 | * checking byte-for-byte */ | |
1763 | have_bits = !bitmap_empty((unsigned long*)bss->tim, | |
1764 | IEEE80211_MAX_AID+1); | |
1765 | ||
1766 | if (bss->dtim_count == 0) | |
1767 | bss->dtim_count = bss->dtim_period - 1; | |
1768 | else | |
1769 | bss->dtim_count--; | |
1770 | ||
1771 | tim = pos = (u8 *) skb_put(skb, 6); | |
1772 | *pos++ = WLAN_EID_TIM; | |
1773 | *pos++ = 4; | |
1774 | *pos++ = bss->dtim_count; | |
1775 | *pos++ = bss->dtim_period; | |
1776 | ||
1777 | if (bss->dtim_count == 0 && !skb_queue_empty(&bss->ps_bc_buf)) | |
1778 | aid0 = 1; | |
1779 | ||
1780 | if (have_bits) { | |
1781 | /* Find largest even number N1 so that bits numbered 1 through | |
1782 | * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits | |
1783 | * (N2 + 1) x 8 through 2007 are 0. */ | |
1784 | n1 = 0; | |
1785 | for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) { | |
1786 | if (bss->tim[i]) { | |
1787 | n1 = i & 0xfe; | |
1788 | break; | |
1789 | } | |
1790 | } | |
1791 | n2 = n1; | |
1792 | for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) { | |
1793 | if (bss->tim[i]) { | |
1794 | n2 = i; | |
1795 | break; | |
1796 | } | |
1797 | } | |
1798 | ||
1799 | /* Bitmap control */ | |
1800 | *pos++ = n1 | aid0; | |
1801 | /* Part Virt Bitmap */ | |
1802 | memcpy(pos, bss->tim + n1, n2 - n1 + 1); | |
1803 | ||
1804 | tim[1] = n2 - n1 + 4; | |
1805 | skb_put(skb, n2 - n1); | |
1806 | } else { | |
1807 | *pos++ = aid0; /* Bitmap control */ | |
1808 | *pos++ = 0; /* Part Virt Bitmap */ | |
1809 | } | |
1810 | spin_unlock_bh(&local->sta_lock); | |
1811 | } | |
1812 | ||
1813 | ||
1814 | struct sk_buff * ieee80211_beacon_get(struct ieee80211_hw *hw, int if_id, | |
1815 | struct ieee80211_tx_control *control) | |
1816 | { | |
1817 | struct ieee80211_local *local = hw_to_local(hw); | |
1818 | struct sk_buff *skb; | |
1819 | struct net_device *bdev; | |
1820 | struct ieee80211_sub_if_data *sdata = NULL; | |
1821 | struct ieee80211_if_ap *ap = NULL; | |
1822 | struct ieee80211_rate *rate; | |
1823 | struct rate_control_extra extra; | |
1824 | u8 *b_head, *b_tail; | |
1825 | int bh_len, bt_len; | |
1826 | ||
1827 | bdev = dev_get_by_index(if_id); | |
1828 | if (bdev) { | |
1829 | sdata = IEEE80211_DEV_TO_SUB_IF(bdev); | |
1830 | ap = &sdata->u.ap; | |
1831 | dev_put(bdev); | |
1832 | } | |
1833 | ||
1834 | if (!ap || sdata->type != IEEE80211_IF_TYPE_AP || | |
1835 | !ap->beacon_head) { | |
1836 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
1837 | if (net_ratelimit()) | |
1838 | printk(KERN_DEBUG "no beacon data avail for idx=%d " | |
1839 | "(%s)\n", if_id, bdev ? bdev->name : "N/A"); | |
1840 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ | |
1841 | return NULL; | |
1842 | } | |
1843 | ||
1844 | /* Assume we are generating the normal beacon locally */ | |
1845 | b_head = ap->beacon_head; | |
1846 | b_tail = ap->beacon_tail; | |
1847 | bh_len = ap->beacon_head_len; | |
1848 | bt_len = ap->beacon_tail_len; | |
1849 | ||
1850 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + | |
1851 | bh_len + bt_len + 256 /* maximum TIM len */); | |
1852 | if (!skb) | |
1853 | return NULL; | |
1854 | ||
1855 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
1856 | memcpy(skb_put(skb, bh_len), b_head, bh_len); | |
1857 | ||
1858 | ieee80211_include_sequence(sdata, (struct ieee80211_hdr *)skb->data); | |
1859 | ||
1860 | ieee80211_beacon_add_tim(local, ap, skb); | |
1861 | ||
1862 | if (b_tail) { | |
1863 | memcpy(skb_put(skb, bt_len), b_tail, bt_len); | |
1864 | } | |
1865 | ||
1866 | if (control) { | |
1867 | memset(&extra, 0, sizeof(extra)); | |
1868 | extra.mode = local->oper_hw_mode; | |
1869 | ||
1870 | rate = rate_control_get_rate(local, local->mdev, skb, &extra); | |
1871 | if (!rate) { | |
1872 | if (net_ratelimit()) { | |
1873 | printk(KERN_DEBUG "%s: ieee80211_beacon_get: no rate " | |
1874 | "found\n", local->mdev->name); | |
1875 | } | |
1876 | dev_kfree_skb(skb); | |
1877 | return NULL; | |
1878 | } | |
1879 | ||
1880 | control->tx_rate = (local->short_preamble && | |
1881 | (rate->flags & IEEE80211_RATE_PREAMBLE2)) ? | |
1882 | rate->val2 : rate->val; | |
1883 | control->antenna_sel_tx = local->hw.conf.antenna_sel_tx; | |
1884 | control->power_level = local->hw.conf.power_level; | |
1885 | control->flags |= IEEE80211_TXCTL_NO_ACK; | |
1886 | control->retry_limit = 1; | |
1887 | control->flags |= IEEE80211_TXCTL_CLEAR_DST_MASK; | |
1888 | } | |
1889 | ||
1890 | ap->num_beacons++; | |
1891 | return skb; | |
1892 | } | |
1893 | EXPORT_SYMBOL(ieee80211_beacon_get); | |
1894 | ||
1895 | __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, | |
1896 | size_t frame_len, | |
1897 | const struct ieee80211_tx_control *frame_txctl) | |
1898 | { | |
1899 | struct ieee80211_local *local = hw_to_local(hw); | |
1900 | struct ieee80211_rate *rate; | |
1901 | int short_preamble = local->short_preamble; | |
1902 | int erp; | |
1903 | u16 dur; | |
1904 | ||
1905 | rate = frame_txctl->rts_rate; | |
1906 | erp = !!(rate->flags & IEEE80211_RATE_ERP); | |
1907 | ||
1908 | /* CTS duration */ | |
1909 | dur = ieee80211_frame_duration(local, 10, rate->rate, | |
1910 | erp, short_preamble); | |
1911 | /* Data frame duration */ | |
1912 | dur += ieee80211_frame_duration(local, frame_len, rate->rate, | |
1913 | erp, short_preamble); | |
1914 | /* ACK duration */ | |
1915 | dur += ieee80211_frame_duration(local, 10, rate->rate, | |
1916 | erp, short_preamble); | |
1917 | ||
1918 | return cpu_to_le16(dur); | |
1919 | } | |
1920 | EXPORT_SYMBOL(ieee80211_rts_duration); | |
1921 | ||
1922 | ||
1923 | __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, | |
1924 | size_t frame_len, | |
1925 | const struct ieee80211_tx_control *frame_txctl) | |
1926 | { | |
1927 | struct ieee80211_local *local = hw_to_local(hw); | |
1928 | struct ieee80211_rate *rate; | |
1929 | int short_preamble = local->short_preamble; | |
1930 | int erp; | |
1931 | u16 dur; | |
1932 | ||
1933 | rate = frame_txctl->rts_rate; | |
1934 | erp = !!(rate->flags & IEEE80211_RATE_ERP); | |
1935 | ||
1936 | /* Data frame duration */ | |
1937 | dur = ieee80211_frame_duration(local, frame_len, rate->rate, | |
1938 | erp, short_preamble); | |
1939 | if (!(frame_txctl->flags & IEEE80211_TXCTL_NO_ACK)) { | |
1940 | /* ACK duration */ | |
1941 | dur += ieee80211_frame_duration(local, 10, rate->rate, | |
1942 | erp, short_preamble); | |
1943 | } | |
1944 | ||
1945 | return cpu_to_le16(dur); | |
1946 | } | |
1947 | EXPORT_SYMBOL(ieee80211_ctstoself_duration); | |
1948 | ||
1949 | void ieee80211_rts_get(struct ieee80211_hw *hw, | |
1950 | const void *frame, size_t frame_len, | |
1951 | const struct ieee80211_tx_control *frame_txctl, | |
1952 | struct ieee80211_rts *rts) | |
1953 | { | |
1954 | const struct ieee80211_hdr *hdr = frame; | |
1955 | u16 fctl; | |
1956 | ||
1957 | fctl = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS; | |
1958 | rts->frame_control = cpu_to_le16(fctl); | |
1959 | rts->duration = ieee80211_rts_duration(hw, frame_len, frame_txctl); | |
1960 | memcpy(rts->ra, hdr->addr1, sizeof(rts->ra)); | |
1961 | memcpy(rts->ta, hdr->addr2, sizeof(rts->ta)); | |
1962 | } | |
1963 | EXPORT_SYMBOL(ieee80211_rts_get); | |
1964 | ||
1965 | void ieee80211_ctstoself_get(struct ieee80211_hw *hw, | |
1966 | const void *frame, size_t frame_len, | |
1967 | const struct ieee80211_tx_control *frame_txctl, | |
1968 | struct ieee80211_cts *cts) | |
1969 | { | |
1970 | const struct ieee80211_hdr *hdr = frame; | |
1971 | u16 fctl; | |
1972 | ||
1973 | fctl = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS; | |
1974 | cts->frame_control = cpu_to_le16(fctl); | |
1975 | cts->duration = ieee80211_ctstoself_duration(hw, frame_len, frame_txctl); | |
1976 | memcpy(cts->ra, hdr->addr1, sizeof(cts->ra)); | |
1977 | } | |
1978 | EXPORT_SYMBOL(ieee80211_ctstoself_get); | |
1979 | ||
1980 | struct sk_buff * | |
1981 | ieee80211_get_buffered_bc(struct ieee80211_hw *hw, int if_id, | |
1982 | struct ieee80211_tx_control *control) | |
1983 | { | |
1984 | struct ieee80211_local *local = hw_to_local(hw); | |
1985 | struct sk_buff *skb; | |
1986 | struct sta_info *sta; | |
1987 | ieee80211_tx_handler *handler; | |
1988 | struct ieee80211_txrx_data tx; | |
1989 | ieee80211_txrx_result res = TXRX_DROP; | |
1990 | struct net_device *bdev; | |
1991 | struct ieee80211_sub_if_data *sdata; | |
1992 | struct ieee80211_if_ap *bss = NULL; | |
1993 | ||
1994 | bdev = dev_get_by_index(if_id); | |
1995 | if (bdev) { | |
1996 | sdata = IEEE80211_DEV_TO_SUB_IF(bdev); | |
1997 | bss = &sdata->u.ap; | |
1998 | dev_put(bdev); | |
1999 | } | |
2000 | if (!bss || sdata->type != IEEE80211_IF_TYPE_AP || !bss->beacon_head) | |
2001 | return NULL; | |
2002 | ||
2003 | if (bss->dtim_count != 0) | |
2004 | return NULL; /* send buffered bc/mc only after DTIM beacon */ | |
2005 | memset(control, 0, sizeof(*control)); | |
2006 | while (1) { | |
2007 | skb = skb_dequeue(&bss->ps_bc_buf); | |
2008 | if (!skb) | |
2009 | return NULL; | |
2010 | local->total_ps_buffered--; | |
2011 | ||
2012 | if (!skb_queue_empty(&bss->ps_bc_buf) && skb->len >= 2) { | |
2013 | struct ieee80211_hdr *hdr = | |
2014 | (struct ieee80211_hdr *) skb->data; | |
2015 | /* more buffered multicast/broadcast frames ==> set | |
2016 | * MoreData flag in IEEE 802.11 header to inform PS | |
2017 | * STAs */ | |
2018 | hdr->frame_control |= | |
2019 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
2020 | } | |
2021 | ||
2022 | if (ieee80211_tx_prepare(&tx, skb, local->mdev, control) == 0) | |
2023 | break; | |
2024 | dev_kfree_skb_any(skb); | |
2025 | } | |
2026 | sta = tx.sta; | |
2027 | tx.u.tx.ps_buffered = 1; | |
2028 | ||
2029 | for (handler = local->tx_handlers; *handler != NULL; handler++) { | |
2030 | res = (*handler)(&tx); | |
2031 | if (res == TXRX_DROP || res == TXRX_QUEUED) | |
2032 | break; | |
2033 | } | |
2034 | dev_put(tx.dev); | |
2035 | skb = tx.skb; /* handlers are allowed to change skb */ | |
2036 | ||
2037 | if (res == TXRX_DROP) { | |
2038 | I802_DEBUG_INC(local->tx_handlers_drop); | |
2039 | dev_kfree_skb(skb); | |
2040 | skb = NULL; | |
2041 | } else if (res == TXRX_QUEUED) { | |
2042 | I802_DEBUG_INC(local->tx_handlers_queued); | |
2043 | skb = NULL; | |
2044 | } | |
2045 | ||
2046 | if (sta) | |
2047 | sta_info_put(sta); | |
2048 | ||
2049 | return skb; | |
2050 | } | |
2051 | EXPORT_SYMBOL(ieee80211_get_buffered_bc); | |
2052 | ||
2053 | static int __ieee80211_if_config(struct net_device *dev, | |
2054 | struct sk_buff *beacon, | |
2055 | struct ieee80211_tx_control *control) | |
2056 | { | |
2057 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2058 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2059 | struct ieee80211_if_conf conf; | |
2060 | static u8 scan_bssid[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; | |
2061 | ||
2062 | if (!local->ops->config_interface || !netif_running(dev)) | |
2063 | return 0; | |
2064 | ||
2065 | memset(&conf, 0, sizeof(conf)); | |
2066 | conf.type = sdata->type; | |
2067 | if (sdata->type == IEEE80211_IF_TYPE_STA || | |
2068 | sdata->type == IEEE80211_IF_TYPE_IBSS) { | |
2069 | if (local->sta_scanning && | |
2070 | local->scan_dev == dev) | |
2071 | conf.bssid = scan_bssid; | |
2072 | else | |
2073 | conf.bssid = sdata->u.sta.bssid; | |
2074 | conf.ssid = sdata->u.sta.ssid; | |
2075 | conf.ssid_len = sdata->u.sta.ssid_len; | |
2076 | conf.generic_elem = sdata->u.sta.extra_ie; | |
2077 | conf.generic_elem_len = sdata->u.sta.extra_ie_len; | |
2078 | } else if (sdata->type == IEEE80211_IF_TYPE_AP) { | |
2079 | conf.ssid = sdata->u.ap.ssid; | |
2080 | conf.ssid_len = sdata->u.ap.ssid_len; | |
2081 | conf.generic_elem = sdata->u.ap.generic_elem; | |
2082 | conf.generic_elem_len = sdata->u.ap.generic_elem_len; | |
2083 | conf.beacon = beacon; | |
2084 | conf.beacon_control = control; | |
2085 | } | |
2086 | return local->ops->config_interface(local_to_hw(local), | |
2087 | dev->ifindex, &conf); | |
2088 | } | |
2089 | ||
2090 | int ieee80211_if_config(struct net_device *dev) | |
2091 | { | |
2092 | return __ieee80211_if_config(dev, NULL, NULL); | |
2093 | } | |
2094 | ||
2095 | int ieee80211_if_config_beacon(struct net_device *dev) | |
2096 | { | |
2097 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2098 | struct ieee80211_tx_control control; | |
2099 | struct sk_buff *skb; | |
2100 | ||
2101 | if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE)) | |
2102 | return 0; | |
2103 | skb = ieee80211_beacon_get(local_to_hw(local), dev->ifindex, &control); | |
2104 | if (!skb) | |
2105 | return -ENOMEM; | |
2106 | return __ieee80211_if_config(dev, skb, &control); | |
2107 | } | |
2108 | ||
2109 | int ieee80211_hw_config(struct ieee80211_local *local) | |
2110 | { | |
2111 | struct ieee80211_hw_mode *mode; | |
2112 | struct ieee80211_channel *chan; | |
2113 | int ret = 0; | |
2114 | ||
2115 | if (local->sta_scanning) { | |
2116 | chan = local->scan_channel; | |
2117 | mode = local->scan_hw_mode; | |
2118 | } else { | |
2119 | chan = local->oper_channel; | |
2120 | mode = local->oper_hw_mode; | |
2121 | } | |
2122 | ||
2123 | local->hw.conf.channel = chan->chan; | |
2124 | local->hw.conf.channel_val = chan->val; | |
2125 | local->hw.conf.power_level = chan->power_level; | |
2126 | local->hw.conf.freq = chan->freq; | |
2127 | local->hw.conf.phymode = mode->mode; | |
2128 | local->hw.conf.antenna_max = chan->antenna_max; | |
2129 | local->hw.conf.chan = chan; | |
2130 | local->hw.conf.mode = mode; | |
2131 | ||
2132 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
2133 | printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d " | |
2134 | "phymode=%d\n", local->hw.conf.channel, local->hw.conf.freq, | |
2135 | local->hw.conf.phymode); | |
2136 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ | |
2137 | ||
2138 | if (local->ops->config) | |
2139 | ret = local->ops->config(local_to_hw(local), &local->hw.conf); | |
2140 | ||
2141 | return ret; | |
2142 | } | |
2143 | ||
2144 | ||
2145 | static int ieee80211_change_mtu(struct net_device *dev, int new_mtu) | |
2146 | { | |
2147 | /* FIX: what would be proper limits for MTU? | |
2148 | * This interface uses 802.3 frames. */ | |
2149 | if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6) { | |
2150 | printk(KERN_WARNING "%s: invalid MTU %d\n", | |
2151 | dev->name, new_mtu); | |
2152 | return -EINVAL; | |
2153 | } | |
2154 | ||
2155 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
2156 | printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu); | |
2157 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ | |
2158 | dev->mtu = new_mtu; | |
2159 | return 0; | |
2160 | } | |
2161 | ||
2162 | ||
2163 | static int ieee80211_change_mtu_apdev(struct net_device *dev, int new_mtu) | |
2164 | { | |
2165 | /* FIX: what would be proper limits for MTU? | |
2166 | * This interface uses 802.11 frames. */ | |
2167 | if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN) { | |
2168 | printk(KERN_WARNING "%s: invalid MTU %d\n", | |
2169 | dev->name, new_mtu); | |
2170 | return -EINVAL; | |
2171 | } | |
2172 | ||
2173 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
2174 | printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu); | |
2175 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ | |
2176 | dev->mtu = new_mtu; | |
2177 | return 0; | |
2178 | } | |
2179 | ||
2180 | enum netif_tx_lock_class { | |
2181 | TX_LOCK_NORMAL, | |
2182 | TX_LOCK_MASTER, | |
2183 | }; | |
2184 | ||
2185 | static inline void netif_tx_lock_nested(struct net_device *dev, int subclass) | |
2186 | { | |
2187 | spin_lock_nested(&dev->_xmit_lock, subclass); | |
2188 | dev->xmit_lock_owner = smp_processor_id(); | |
2189 | } | |
2190 | ||
2191 | static void ieee80211_set_multicast_list(struct net_device *dev) | |
2192 | { | |
2193 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2194 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2195 | unsigned short flags; | |
2196 | ||
2197 | netif_tx_lock_nested(local->mdev, TX_LOCK_MASTER); | |
2198 | if (((dev->flags & IFF_ALLMULTI) != 0) ^ (sdata->allmulti != 0)) { | |
2199 | if (sdata->allmulti) { | |
2200 | sdata->allmulti = 0; | |
2201 | local->iff_allmultis--; | |
2202 | } else { | |
2203 | sdata->allmulti = 1; | |
2204 | local->iff_allmultis++; | |
2205 | } | |
2206 | } | |
2207 | if (((dev->flags & IFF_PROMISC) != 0) ^ (sdata->promisc != 0)) { | |
2208 | if (sdata->promisc) { | |
2209 | sdata->promisc = 0; | |
2210 | local->iff_promiscs--; | |
2211 | } else { | |
2212 | sdata->promisc = 1; | |
2213 | local->iff_promiscs++; | |
2214 | } | |
2215 | } | |
2216 | if (dev->mc_count != sdata->mc_count) { | |
2217 | local->mc_count = local->mc_count - sdata->mc_count + | |
2218 | dev->mc_count; | |
2219 | sdata->mc_count = dev->mc_count; | |
2220 | } | |
2221 | if (local->ops->set_multicast_list) { | |
2222 | flags = local->mdev->flags; | |
2223 | if (local->iff_allmultis) | |
2224 | flags |= IFF_ALLMULTI; | |
2225 | if (local->iff_promiscs) | |
2226 | flags |= IFF_PROMISC; | |
2227 | read_lock(&local->sub_if_lock); | |
2228 | local->ops->set_multicast_list(local_to_hw(local), flags, | |
2229 | local->mc_count); | |
2230 | read_unlock(&local->sub_if_lock); | |
2231 | } | |
2232 | netif_tx_unlock(local->mdev); | |
2233 | } | |
2234 | ||
2235 | struct dev_mc_list *ieee80211_get_mc_list_item(struct ieee80211_hw *hw, | |
2236 | struct dev_mc_list *prev, | |
2237 | void **ptr) | |
2238 | { | |
2239 | struct ieee80211_local *local = hw_to_local(hw); | |
2240 | struct ieee80211_sub_if_data *sdata = *ptr; | |
2241 | struct dev_mc_list *mc; | |
2242 | ||
2243 | if (!prev) { | |
2244 | WARN_ON(sdata); | |
2245 | sdata = NULL; | |
2246 | } | |
2247 | if (!prev || !prev->next) { | |
2248 | if (sdata) | |
2249 | sdata = list_entry(sdata->list.next, | |
2250 | struct ieee80211_sub_if_data, list); | |
2251 | else | |
2252 | sdata = list_entry(local->sub_if_list.next, | |
2253 | struct ieee80211_sub_if_data, list); | |
2254 | if (&sdata->list != &local->sub_if_list) | |
2255 | mc = sdata->dev->mc_list; | |
2256 | else | |
2257 | mc = NULL; | |
2258 | } else | |
2259 | mc = prev->next; | |
2260 | ||
2261 | *ptr = sdata; | |
2262 | return mc; | |
2263 | } | |
2264 | EXPORT_SYMBOL(ieee80211_get_mc_list_item); | |
2265 | ||
2266 | static struct net_device_stats *ieee80211_get_stats(struct net_device *dev) | |
2267 | { | |
2268 | struct ieee80211_sub_if_data *sdata; | |
2269 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2270 | return &(sdata->stats); | |
2271 | } | |
2272 | ||
2273 | static void ieee80211_if_shutdown(struct net_device *dev) | |
2274 | { | |
2275 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2276 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2277 | ||
2278 | ASSERT_RTNL(); | |
2279 | switch (sdata->type) { | |
2280 | case IEEE80211_IF_TYPE_STA: | |
2281 | case IEEE80211_IF_TYPE_IBSS: | |
2282 | sdata->u.sta.state = IEEE80211_DISABLED; | |
2283 | del_timer_sync(&sdata->u.sta.timer); | |
2284 | skb_queue_purge(&sdata->u.sta.skb_queue); | |
2285 | if (!local->ops->hw_scan && | |
2286 | local->scan_dev == sdata->dev) { | |
2287 | local->sta_scanning = 0; | |
2288 | cancel_delayed_work(&local->scan_work); | |
2289 | } | |
2290 | flush_workqueue(local->hw.workqueue); | |
2291 | break; | |
2292 | } | |
2293 | } | |
2294 | ||
2295 | static inline int identical_mac_addr_allowed(int type1, int type2) | |
2296 | { | |
2297 | return (type1 == IEEE80211_IF_TYPE_MNTR || | |
2298 | type2 == IEEE80211_IF_TYPE_MNTR || | |
2299 | (type1 == IEEE80211_IF_TYPE_AP && | |
2300 | type2 == IEEE80211_IF_TYPE_WDS) || | |
2301 | (type1 == IEEE80211_IF_TYPE_WDS && | |
2302 | (type2 == IEEE80211_IF_TYPE_WDS || | |
2303 | type2 == IEEE80211_IF_TYPE_AP)) || | |
2304 | (type1 == IEEE80211_IF_TYPE_AP && | |
2305 | type2 == IEEE80211_IF_TYPE_VLAN) || | |
2306 | (type1 == IEEE80211_IF_TYPE_VLAN && | |
2307 | (type2 == IEEE80211_IF_TYPE_AP || | |
2308 | type2 == IEEE80211_IF_TYPE_VLAN))); | |
2309 | } | |
2310 | ||
2311 | static int ieee80211_master_open(struct net_device *dev) | |
2312 | { | |
2313 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2314 | struct ieee80211_sub_if_data *sdata; | |
2315 | int res = -EOPNOTSUPP; | |
2316 | ||
2317 | read_lock(&local->sub_if_lock); | |
2318 | list_for_each_entry(sdata, &local->sub_if_list, list) { | |
2319 | if (sdata->dev != dev && netif_running(sdata->dev)) { | |
2320 | res = 0; | |
2321 | break; | |
2322 | } | |
2323 | } | |
2324 | read_unlock(&local->sub_if_lock); | |
2325 | return res; | |
2326 | } | |
2327 | ||
2328 | static int ieee80211_master_stop(struct net_device *dev) | |
2329 | { | |
2330 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2331 | struct ieee80211_sub_if_data *sdata; | |
2332 | ||
2333 | read_lock(&local->sub_if_lock); | |
2334 | list_for_each_entry(sdata, &local->sub_if_list, list) | |
2335 | if (sdata->dev != dev && netif_running(sdata->dev)) | |
2336 | dev_close(sdata->dev); | |
2337 | read_unlock(&local->sub_if_lock); | |
2338 | ||
2339 | return 0; | |
2340 | } | |
2341 | ||
2342 | static int ieee80211_mgmt_open(struct net_device *dev) | |
2343 | { | |
2344 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2345 | ||
2346 | if (!netif_running(local->mdev)) | |
2347 | return -EOPNOTSUPP; | |
2348 | return 0; | |
2349 | } | |
2350 | ||
2351 | static int ieee80211_mgmt_stop(struct net_device *dev) | |
2352 | { | |
2353 | return 0; | |
2354 | } | |
2355 | ||
2356 | /* Check if running monitor interfaces should go to a "soft monitor" mode | |
2357 | * and switch them if necessary. */ | |
2358 | static inline void ieee80211_start_soft_monitor(struct ieee80211_local *local) | |
2359 | { | |
2360 | struct ieee80211_if_init_conf conf; | |
2361 | ||
2362 | if (local->open_count && local->open_count == local->monitors && | |
2363 | !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER) && | |
2364 | local->ops->remove_interface) { | |
2365 | conf.if_id = -1; | |
2366 | conf.type = IEEE80211_IF_TYPE_MNTR; | |
2367 | conf.mac_addr = NULL; | |
2368 | local->ops->remove_interface(local_to_hw(local), &conf); | |
2369 | } | |
2370 | } | |
2371 | ||
2372 | /* Check if running monitor interfaces should go to a "hard monitor" mode | |
2373 | * and switch them if necessary. */ | |
2374 | static void ieee80211_start_hard_monitor(struct ieee80211_local *local) | |
2375 | { | |
2376 | struct ieee80211_if_init_conf conf; | |
2377 | ||
2378 | if (local->open_count && local->open_count == local->monitors && | |
2379 | !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER) && | |
2380 | local->ops->add_interface) { | |
2381 | conf.if_id = -1; | |
2382 | conf.type = IEEE80211_IF_TYPE_MNTR; | |
2383 | conf.mac_addr = NULL; | |
2384 | local->ops->add_interface(local_to_hw(local), &conf); | |
2385 | } | |
2386 | } | |
2387 | ||
2388 | static int ieee80211_open(struct net_device *dev) | |
2389 | { | |
2390 | struct ieee80211_sub_if_data *sdata, *nsdata; | |
2391 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2392 | struct ieee80211_if_init_conf conf; | |
2393 | int res; | |
2394 | ||
2395 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2396 | read_lock(&local->sub_if_lock); | |
2397 | list_for_each_entry(nsdata, &local->sub_if_list, list) { | |
2398 | struct net_device *ndev = nsdata->dev; | |
2399 | ||
2400 | if (ndev != dev && ndev != local->mdev && netif_running(ndev) && | |
2401 | compare_ether_addr(dev->dev_addr, ndev->dev_addr) == 0 && | |
2402 | !identical_mac_addr_allowed(sdata->type, nsdata->type)) { | |
2403 | read_unlock(&local->sub_if_lock); | |
2404 | return -ENOTUNIQ; | |
2405 | } | |
2406 | } | |
2407 | read_unlock(&local->sub_if_lock); | |
2408 | ||
2409 | if (sdata->type == IEEE80211_IF_TYPE_WDS && | |
2410 | is_zero_ether_addr(sdata->u.wds.remote_addr)) | |
2411 | return -ENOLINK; | |
2412 | ||
2413 | if (sdata->type == IEEE80211_IF_TYPE_MNTR && local->open_count && | |
2414 | !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) { | |
2415 | /* run the interface in a "soft monitor" mode */ | |
2416 | local->monitors++; | |
2417 | local->open_count++; | |
2418 | local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP; | |
2419 | return 0; | |
2420 | } | |
2421 | ieee80211_start_soft_monitor(local); | |
2422 | ||
2423 | if (local->ops->add_interface) { | |
2424 | conf.if_id = dev->ifindex; | |
2425 | conf.type = sdata->type; | |
2426 | conf.mac_addr = dev->dev_addr; | |
2427 | res = local->ops->add_interface(local_to_hw(local), &conf); | |
2428 | if (res) { | |
2429 | if (sdata->type == IEEE80211_IF_TYPE_MNTR) | |
2430 | ieee80211_start_hard_monitor(local); | |
2431 | return res; | |
2432 | } | |
2433 | } else { | |
2434 | if (sdata->type != IEEE80211_IF_TYPE_STA) | |
2435 | return -EOPNOTSUPP; | |
2436 | if (local->open_count > 0) | |
2437 | return -ENOBUFS; | |
2438 | } | |
2439 | ||
2440 | if (local->open_count == 0) { | |
2441 | res = 0; | |
2442 | tasklet_enable(&local->tx_pending_tasklet); | |
2443 | tasklet_enable(&local->tasklet); | |
2444 | if (local->ops->open) | |
2445 | res = local->ops->open(local_to_hw(local)); | |
2446 | if (res == 0) { | |
2447 | res = dev_open(local->mdev); | |
2448 | if (res) { | |
2449 | if (local->ops->stop) | |
2450 | local->ops->stop(local_to_hw(local)); | |
2451 | } else { | |
2452 | res = ieee80211_hw_config(local); | |
2453 | if (res && local->ops->stop) | |
2454 | local->ops->stop(local_to_hw(local)); | |
2455 | else if (!res && local->apdev) | |
2456 | dev_open(local->apdev); | |
2457 | } | |
2458 | } | |
2459 | if (res) { | |
2460 | if (local->ops->remove_interface) | |
2461 | local->ops->remove_interface(local_to_hw(local), | |
2462 | &conf); | |
2463 | return res; | |
2464 | } | |
2465 | } | |
2466 | local->open_count++; | |
2467 | ||
2468 | if (sdata->type == IEEE80211_IF_TYPE_MNTR) { | |
2469 | local->monitors++; | |
2470 | local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP; | |
2471 | } else | |
2472 | ieee80211_if_config(dev); | |
2473 | ||
2474 | if (sdata->type == IEEE80211_IF_TYPE_STA && | |
2475 | !local->user_space_mlme) | |
2476 | netif_carrier_off(dev); | |
2477 | ||
2478 | netif_start_queue(dev); | |
2479 | return 0; | |
2480 | } | |
2481 | ||
2482 | ||
2483 | static int ieee80211_stop(struct net_device *dev) | |
2484 | { | |
2485 | struct ieee80211_sub_if_data *sdata; | |
2486 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2487 | ||
2488 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2489 | ||
2490 | if (sdata->type == IEEE80211_IF_TYPE_MNTR && | |
2491 | local->open_count > 1 && | |
2492 | !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) { | |
2493 | /* remove "soft monitor" interface */ | |
2494 | local->open_count--; | |
2495 | local->monitors--; | |
2496 | if (!local->monitors) | |
2497 | local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP; | |
2498 | return 0; | |
2499 | } | |
2500 | ||
2501 | netif_stop_queue(dev); | |
2502 | ieee80211_if_shutdown(dev); | |
2503 | ||
2504 | if (sdata->type == IEEE80211_IF_TYPE_MNTR) { | |
2505 | local->monitors--; | |
2506 | if (!local->monitors) | |
2507 | local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP; | |
2508 | } | |
2509 | ||
2510 | local->open_count--; | |
2511 | if (local->open_count == 0) { | |
2512 | if (netif_running(local->mdev)) | |
2513 | dev_close(local->mdev); | |
2514 | if (local->apdev) | |
2515 | dev_close(local->apdev); | |
2516 | if (local->ops->stop) | |
2517 | local->ops->stop(local_to_hw(local)); | |
2518 | tasklet_disable(&local->tx_pending_tasklet); | |
2519 | tasklet_disable(&local->tasklet); | |
2520 | } | |
2521 | if (local->ops->remove_interface) { | |
2522 | struct ieee80211_if_init_conf conf; | |
2523 | ||
2524 | conf.if_id = dev->ifindex; | |
2525 | conf.type = sdata->type; | |
2526 | conf.mac_addr = dev->dev_addr; | |
2527 | local->ops->remove_interface(local_to_hw(local), &conf); | |
2528 | } | |
2529 | ||
2530 | ieee80211_start_hard_monitor(local); | |
2531 | ||
2532 | return 0; | |
2533 | } | |
2534 | ||
2535 | ||
2536 | static int header_parse_80211(struct sk_buff *skb, unsigned char *haddr) | |
2537 | { | |
2538 | memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */ | |
2539 | return ETH_ALEN; | |
2540 | } | |
2541 | ||
2542 | static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr) | |
2543 | { | |
2544 | return compare_ether_addr(raddr, addr) == 0 || | |
2545 | is_broadcast_ether_addr(raddr); | |
2546 | } | |
2547 | ||
2548 | ||
2549 | static ieee80211_txrx_result | |
2550 | ieee80211_rx_h_data(struct ieee80211_txrx_data *rx) | |
2551 | { | |
2552 | struct net_device *dev = rx->dev; | |
2553 | struct ieee80211_local *local = rx->local; | |
2554 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) rx->skb->data; | |
2555 | u16 fc, hdrlen, ethertype; | |
2556 | u8 *payload; | |
2557 | u8 dst[ETH_ALEN]; | |
2558 | u8 src[ETH_ALEN]; | |
2559 | struct sk_buff *skb = rx->skb, *skb2; | |
2560 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2561 | ||
2562 | fc = rx->fc; | |
2563 | if (unlikely((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA)) | |
2564 | return TXRX_CONTINUE; | |
2565 | ||
2566 | if (unlikely(!WLAN_FC_DATA_PRESENT(fc))) | |
2567 | return TXRX_DROP; | |
2568 | ||
2569 | hdrlen = ieee80211_get_hdrlen(fc); | |
2570 | ||
2571 | /* convert IEEE 802.11 header + possible LLC headers into Ethernet | |
2572 | * header | |
2573 | * IEEE 802.11 address fields: | |
2574 | * ToDS FromDS Addr1 Addr2 Addr3 Addr4 | |
2575 | * 0 0 DA SA BSSID n/a | |
2576 | * 0 1 DA BSSID SA n/a | |
2577 | * 1 0 BSSID SA DA n/a | |
2578 | * 1 1 RA TA DA SA | |
2579 | */ | |
2580 | ||
2581 | switch (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) { | |
2582 | case IEEE80211_FCTL_TODS: | |
2583 | /* BSSID SA DA */ | |
2584 | memcpy(dst, hdr->addr3, ETH_ALEN); | |
2585 | memcpy(src, hdr->addr2, ETH_ALEN); | |
2586 | ||
2587 | if (unlikely(sdata->type != IEEE80211_IF_TYPE_AP && | |
2588 | sdata->type != IEEE80211_IF_TYPE_VLAN)) { | |
2589 | printk(KERN_DEBUG "%s: dropped ToDS frame (BSSID=" | |
2590 | MAC_FMT " SA=" MAC_FMT " DA=" MAC_FMT ")\n", | |
2591 | dev->name, MAC_ARG(hdr->addr1), | |
2592 | MAC_ARG(hdr->addr2), MAC_ARG(hdr->addr3)); | |
2593 | return TXRX_DROP; | |
2594 | } | |
2595 | break; | |
2596 | case (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS): | |
2597 | /* RA TA DA SA */ | |
2598 | memcpy(dst, hdr->addr3, ETH_ALEN); | |
2599 | memcpy(src, hdr->addr4, ETH_ALEN); | |
2600 | ||
2601 | if (unlikely(sdata->type != IEEE80211_IF_TYPE_WDS)) { | |
2602 | printk(KERN_DEBUG "%s: dropped FromDS&ToDS frame (RA=" | |
2603 | MAC_FMT " TA=" MAC_FMT " DA=" MAC_FMT " SA=" | |
2604 | MAC_FMT ")\n", | |
2605 | rx->dev->name, MAC_ARG(hdr->addr1), | |
2606 | MAC_ARG(hdr->addr2), MAC_ARG(hdr->addr3), | |
2607 | MAC_ARG(hdr->addr4)); | |
2608 | return TXRX_DROP; | |
2609 | } | |
2610 | break; | |
2611 | case IEEE80211_FCTL_FROMDS: | |
2612 | /* DA BSSID SA */ | |
2613 | memcpy(dst, hdr->addr1, ETH_ALEN); | |
2614 | memcpy(src, hdr->addr3, ETH_ALEN); | |
2615 | ||
2616 | if (sdata->type != IEEE80211_IF_TYPE_STA) { | |
2617 | return TXRX_DROP; | |
2618 | } | |
2619 | break; | |
2620 | case 0: | |
2621 | /* DA SA BSSID */ | |
2622 | memcpy(dst, hdr->addr1, ETH_ALEN); | |
2623 | memcpy(src, hdr->addr2, ETH_ALEN); | |
2624 | ||
2625 | if (sdata->type != IEEE80211_IF_TYPE_IBSS) { | |
2626 | if (net_ratelimit()) { | |
2627 | printk(KERN_DEBUG "%s: dropped IBSS frame (DA=" | |
2628 | MAC_FMT " SA=" MAC_FMT " BSSID=" MAC_FMT | |
2629 | ")\n", | |
2630 | dev->name, MAC_ARG(hdr->addr1), | |
2631 | MAC_ARG(hdr->addr2), | |
2632 | MAC_ARG(hdr->addr3)); | |
2633 | } | |
2634 | return TXRX_DROP; | |
2635 | } | |
2636 | break; | |
2637 | } | |
2638 | ||
2639 | payload = skb->data + hdrlen; | |
2640 | ||
2641 | if (unlikely(skb->len - hdrlen < 8)) { | |
2642 | if (net_ratelimit()) { | |
2643 | printk(KERN_DEBUG "%s: RX too short data frame " | |
2644 | "payload\n", dev->name); | |
2645 | } | |
2646 | return TXRX_DROP; | |
2647 | } | |
2648 | ||
2649 | ethertype = (payload[6] << 8) | payload[7]; | |
2650 | ||
2651 | if (likely((compare_ether_addr(payload, rfc1042_header) == 0 && | |
2652 | ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || | |
2653 | compare_ether_addr(payload, bridge_tunnel_header) == 0)) { | |
2654 | /* remove RFC1042 or Bridge-Tunnel encapsulation and | |
2655 | * replace EtherType */ | |
2656 | skb_pull(skb, hdrlen + 6); | |
2657 | memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN); | |
2658 | memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN); | |
2659 | } else { | |
2660 | struct ethhdr *ehdr; | |
2661 | __be16 len; | |
2662 | skb_pull(skb, hdrlen); | |
2663 | len = htons(skb->len); | |
2664 | ehdr = (struct ethhdr *) skb_push(skb, sizeof(struct ethhdr)); | |
2665 | memcpy(ehdr->h_dest, dst, ETH_ALEN); | |
2666 | memcpy(ehdr->h_source, src, ETH_ALEN); | |
2667 | ehdr->h_proto = len; | |
2668 | } | |
2669 | skb->dev = dev; | |
2670 | ||
2671 | skb2 = NULL; | |
2672 | ||
2673 | sdata->stats.rx_packets++; | |
2674 | sdata->stats.rx_bytes += skb->len; | |
2675 | ||
2676 | if (local->bridge_packets && (sdata->type == IEEE80211_IF_TYPE_AP | |
2677 | || sdata->type == IEEE80211_IF_TYPE_VLAN) && rx->u.rx.ra_match) { | |
2678 | if (is_multicast_ether_addr(skb->data)) { | |
2679 | /* send multicast frames both to higher layers in | |
2680 | * local net stack and back to the wireless media */ | |
2681 | skb2 = skb_copy(skb, GFP_ATOMIC); | |
2682 | if (!skb2) | |
2683 | printk(KERN_DEBUG "%s: failed to clone " | |
2684 | "multicast frame\n", dev->name); | |
2685 | } else { | |
2686 | struct sta_info *dsta; | |
2687 | dsta = sta_info_get(local, skb->data); | |
2688 | if (dsta && !dsta->dev) { | |
2689 | printk(KERN_DEBUG "Station with null dev " | |
2690 | "structure!\n"); | |
2691 | } else if (dsta && dsta->dev == dev) { | |
2692 | /* Destination station is associated to this | |
2693 | * AP, so send the frame directly to it and | |
2694 | * do not pass the frame to local net stack. | |
2695 | */ | |
2696 | skb2 = skb; | |
2697 | skb = NULL; | |
2698 | } | |
2699 | if (dsta) | |
2700 | sta_info_put(dsta); | |
2701 | } | |
2702 | } | |
2703 | ||
2704 | if (skb) { | |
2705 | /* deliver to local stack */ | |
2706 | skb->protocol = eth_type_trans(skb, dev); | |
2707 | memset(skb->cb, 0, sizeof(skb->cb)); | |
2708 | netif_rx(skb); | |
2709 | } | |
2710 | ||
2711 | if (skb2) { | |
2712 | /* send to wireless media */ | |
2713 | skb2->protocol = __constant_htons(ETH_P_802_3); | |
2714 | skb_set_network_header(skb2, 0); | |
2715 | skb_set_mac_header(skb2, 0); | |
2716 | dev_queue_xmit(skb2); | |
2717 | } | |
2718 | ||
2719 | return TXRX_QUEUED; | |
2720 | } | |
2721 | ||
2722 | ||
2723 | static struct ieee80211_rate * | |
2724 | ieee80211_get_rate(struct ieee80211_local *local, int phymode, int hw_rate) | |
2725 | { | |
2726 | struct ieee80211_hw_mode *mode; | |
2727 | int r; | |
2728 | ||
2729 | list_for_each_entry(mode, &local->modes_list, list) { | |
2730 | if (mode->mode != phymode) | |
2731 | continue; | |
2732 | for (r = 0; r < mode->num_rates; r++) { | |
2733 | struct ieee80211_rate *rate = &mode->rates[r]; | |
2734 | if (rate->val == hw_rate || | |
2735 | (rate->flags & IEEE80211_RATE_PREAMBLE2 && | |
2736 | rate->val2 == hw_rate)) | |
2737 | return rate; | |
2738 | } | |
2739 | } | |
2740 | ||
2741 | return NULL; | |
2742 | } | |
2743 | ||
2744 | static void | |
2745 | ieee80211_fill_frame_info(struct ieee80211_local *local, | |
2746 | struct ieee80211_frame_info *fi, | |
2747 | struct ieee80211_rx_status *status) | |
2748 | { | |
2749 | if (status) { | |
2750 | struct timespec ts; | |
2751 | struct ieee80211_rate *rate; | |
2752 | ||
2753 | jiffies_to_timespec(jiffies, &ts); | |
2754 | fi->hosttime = cpu_to_be64((u64) ts.tv_sec * 1000000 + | |
2755 | ts.tv_nsec / 1000); | |
2756 | fi->mactime = cpu_to_be64(status->mactime); | |
2757 | switch (status->phymode) { | |
2758 | case MODE_IEEE80211A: | |
2759 | fi->phytype = htonl(ieee80211_phytype_ofdm_dot11_a); | |
2760 | break; | |
2761 | case MODE_IEEE80211B: | |
2762 | fi->phytype = htonl(ieee80211_phytype_dsss_dot11_b); | |
2763 | break; | |
2764 | case MODE_IEEE80211G: | |
2765 | fi->phytype = htonl(ieee80211_phytype_pbcc_dot11_g); | |
2766 | break; | |
2767 | case MODE_ATHEROS_TURBO: | |
2768 | fi->phytype = | |
2769 | htonl(ieee80211_phytype_dsss_dot11_turbo); | |
2770 | break; | |
2771 | default: | |
2772 | fi->phytype = htonl(0xAAAAAAAA); | |
2773 | break; | |
2774 | } | |
2775 | fi->channel = htonl(status->channel); | |
2776 | rate = ieee80211_get_rate(local, status->phymode, | |
2777 | status->rate); | |
2778 | if (rate) { | |
2779 | fi->datarate = htonl(rate->rate); | |
2780 | if (rate->flags & IEEE80211_RATE_PREAMBLE2) { | |
2781 | if (status->rate == rate->val) | |
2782 | fi->preamble = htonl(2); /* long */ | |
2783 | else if (status->rate == rate->val2) | |
2784 | fi->preamble = htonl(1); /* short */ | |
2785 | } else | |
2786 | fi->preamble = htonl(0); | |
2787 | } else { | |
2788 | fi->datarate = htonl(0); | |
2789 | fi->preamble = htonl(0); | |
2790 | } | |
2791 | ||
2792 | fi->antenna = htonl(status->antenna); | |
2793 | fi->priority = htonl(0xffffffff); /* no clue */ | |
2794 | fi->ssi_type = htonl(ieee80211_ssi_raw); | |
2795 | fi->ssi_signal = htonl(status->ssi); | |
2796 | fi->ssi_noise = 0x00000000; | |
2797 | fi->encoding = 0; | |
2798 | } else { | |
2799 | /* clear everything because we really don't know. | |
2800 | * the msg_type field isn't present on monitor frames | |
2801 | * so we don't know whether it will be present or not, | |
2802 | * but it's ok to not clear it since it'll be assigned | |
2803 | * anyway */ | |
2804 | memset(fi, 0, sizeof(*fi) - sizeof(fi->msg_type)); | |
2805 | ||
2806 | fi->ssi_type = htonl(ieee80211_ssi_none); | |
2807 | } | |
2808 | fi->version = htonl(IEEE80211_FI_VERSION); | |
2809 | fi->length = cpu_to_be32(sizeof(*fi) - sizeof(fi->msg_type)); | |
2810 | } | |
2811 | ||
2812 | /* this routine is actually not just for this, but also | |
2813 | * for pushing fake 'management' frames into userspace. | |
2814 | * it shall be replaced by a netlink-based system. */ | |
2815 | void | |
2816 | ieee80211_rx_mgmt(struct ieee80211_local *local, struct sk_buff *skb, | |
2817 | struct ieee80211_rx_status *status, u32 msg_type) | |
2818 | { | |
2819 | struct ieee80211_frame_info *fi; | |
2820 | const size_t hlen = sizeof(struct ieee80211_frame_info); | |
2821 | struct ieee80211_sub_if_data *sdata; | |
2822 | ||
2823 | skb->dev = local->apdev; | |
2824 | ||
2825 | sdata = IEEE80211_DEV_TO_SUB_IF(local->apdev); | |
2826 | ||
2827 | if (skb_headroom(skb) < hlen) { | |
2828 | I802_DEBUG_INC(local->rx_expand_skb_head); | |
2829 | if (pskb_expand_head(skb, hlen, 0, GFP_ATOMIC)) { | |
2830 | dev_kfree_skb(skb); | |
2831 | return; | |
2832 | } | |
2833 | } | |
2834 | ||
2835 | fi = (struct ieee80211_frame_info *) skb_push(skb, hlen); | |
2836 | ||
2837 | ieee80211_fill_frame_info(local, fi, status); | |
2838 | fi->msg_type = htonl(msg_type); | |
2839 | ||
2840 | sdata->stats.rx_packets++; | |
2841 | sdata->stats.rx_bytes += skb->len; | |
2842 | ||
2843 | skb_set_mac_header(skb, 0); | |
2844 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
2845 | skb->pkt_type = PACKET_OTHERHOST; | |
2846 | skb->protocol = htons(ETH_P_802_2); | |
2847 | memset(skb->cb, 0, sizeof(skb->cb)); | |
2848 | netif_rx(skb); | |
2849 | } | |
2850 | ||
2851 | static void | |
2852 | ieee80211_rx_monitor(struct net_device *dev, struct sk_buff *skb, | |
2853 | struct ieee80211_rx_status *status) | |
2854 | { | |
2855 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2856 | struct ieee80211_sub_if_data *sdata; | |
2857 | struct ieee80211_rate *rate; | |
2858 | struct ieee80211_rtap_hdr { | |
2859 | struct ieee80211_radiotap_header hdr; | |
2860 | u8 flags; | |
2861 | u8 rate; | |
2862 | __le16 chan_freq; | |
2863 | __le16 chan_flags; | |
2864 | u8 antsignal; | |
2865 | } __attribute__ ((packed)) *rthdr; | |
2866 | ||
2867 | skb->dev = dev; | |
2868 | ||
2869 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2870 | ||
2871 | if (status->flag & RX_FLAG_RADIOTAP) | |
2872 | goto out; | |
2873 | ||
2874 | if (skb_headroom(skb) < sizeof(*rthdr)) { | |
2875 | I802_DEBUG_INC(local->rx_expand_skb_head); | |
2876 | if (pskb_expand_head(skb, sizeof(*rthdr), 0, GFP_ATOMIC)) { | |
2877 | dev_kfree_skb(skb); | |
2878 | return; | |
2879 | } | |
2880 | } | |
2881 | ||
2882 | rthdr = (struct ieee80211_rtap_hdr *) skb_push(skb, sizeof(*rthdr)); | |
2883 | memset(rthdr, 0, sizeof(*rthdr)); | |
2884 | rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr)); | |
2885 | rthdr->hdr.it_present = | |
2886 | cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) | | |
2887 | (1 << IEEE80211_RADIOTAP_RATE) | | |
2888 | (1 << IEEE80211_RADIOTAP_CHANNEL) | | |
2889 | (1 << IEEE80211_RADIOTAP_DB_ANTSIGNAL)); | |
2890 | rthdr->flags = local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS ? | |
2891 | IEEE80211_RADIOTAP_F_FCS : 0; | |
2892 | rate = ieee80211_get_rate(local, status->phymode, status->rate); | |
2893 | if (rate) | |
2894 | rthdr->rate = rate->rate / 5; | |
2895 | rthdr->chan_freq = cpu_to_le16(status->freq); | |
2896 | rthdr->chan_flags = | |
2897 | status->phymode == MODE_IEEE80211A ? | |
2898 | cpu_to_le16(IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ) : | |
2899 | cpu_to_le16(IEEE80211_CHAN_DYN | IEEE80211_CHAN_2GHZ); | |
2900 | rthdr->antsignal = status->ssi; | |
2901 | ||
2902 | out: | |
2903 | sdata->stats.rx_packets++; | |
2904 | sdata->stats.rx_bytes += skb->len; | |
2905 | ||
2906 | skb_set_mac_header(skb, 0); | |
2907 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
2908 | skb->pkt_type = PACKET_OTHERHOST; | |
2909 | skb->protocol = htons(ETH_P_802_2); | |
2910 | memset(skb->cb, 0, sizeof(skb->cb)); | |
2911 | netif_rx(skb); | |
2912 | } | |
2913 | ||
2914 | int ieee80211_radar_status(struct ieee80211_hw *hw, int channel, | |
2915 | int radar, int radar_type) | |
2916 | { | |
2917 | struct sk_buff *skb; | |
2918 | struct ieee80211_radar_info *msg; | |
2919 | struct ieee80211_local *local = hw_to_local(hw); | |
2920 | ||
2921 | if (!local->apdev) | |
2922 | return 0; | |
2923 | ||
2924 | skb = dev_alloc_skb(sizeof(struct ieee80211_frame_info) + | |
2925 | sizeof(struct ieee80211_radar_info)); | |
2926 | ||
2927 | if (!skb) | |
2928 | return -ENOMEM; | |
2929 | skb_reserve(skb, sizeof(struct ieee80211_frame_info)); | |
2930 | ||
2931 | msg = (struct ieee80211_radar_info *) | |
2932 | skb_put(skb, sizeof(struct ieee80211_radar_info)); | |
2933 | msg->channel = channel; | |
2934 | msg->radar = radar; | |
2935 | msg->radar_type = radar_type; | |
2936 | ||
2937 | ieee80211_rx_mgmt(local, skb, NULL, ieee80211_msg_radar); | |
2938 | return 0; | |
2939 | } | |
2940 | EXPORT_SYMBOL(ieee80211_radar_status); | |
2941 | ||
2942 | int ieee80211_set_aid_for_sta(struct ieee80211_hw *hw, u8 *peer_address, | |
2943 | u16 aid) | |
2944 | { | |
2945 | struct sk_buff *skb; | |
2946 | struct ieee80211_msg_set_aid_for_sta *msg; | |
2947 | struct ieee80211_local *local = hw_to_local(hw); | |
2948 | ||
2949 | /* unlikely because if this event only happens for APs, | |
2950 | * which require an open ap device. */ | |
2951 | if (unlikely(!local->apdev)) | |
2952 | return 0; | |
2953 | ||
2954 | skb = dev_alloc_skb(sizeof(struct ieee80211_frame_info) + | |
2955 | sizeof(struct ieee80211_msg_set_aid_for_sta)); | |
2956 | ||
2957 | if (!skb) | |
2958 | return -ENOMEM; | |
2959 | skb_reserve(skb, sizeof(struct ieee80211_frame_info)); | |
2960 | ||
2961 | msg = (struct ieee80211_msg_set_aid_for_sta *) | |
2962 | skb_put(skb, sizeof(struct ieee80211_msg_set_aid_for_sta)); | |
2963 | memcpy(msg->sta_address, peer_address, ETH_ALEN); | |
2964 | msg->aid = aid; | |
2965 | ||
2966 | ieee80211_rx_mgmt(local, skb, NULL, ieee80211_msg_set_aid_for_sta); | |
2967 | return 0; | |
2968 | } | |
2969 | EXPORT_SYMBOL(ieee80211_set_aid_for_sta); | |
2970 | ||
2971 | static void ap_sta_ps_start(struct net_device *dev, struct sta_info *sta) | |
2972 | { | |
2973 | struct ieee80211_sub_if_data *sdata; | |
2974 | sdata = IEEE80211_DEV_TO_SUB_IF(sta->dev); | |
2975 | ||
2976 | if (sdata->bss) | |
2977 | atomic_inc(&sdata->bss->num_sta_ps); | |
2978 | sta->flags |= WLAN_STA_PS; | |
2979 | sta->pspoll = 0; | |
2980 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG | |
2981 | printk(KERN_DEBUG "%s: STA " MAC_FMT " aid %d enters power " | |
2982 | "save mode\n", dev->name, MAC_ARG(sta->addr), sta->aid); | |
2983 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ | |
2984 | } | |
2985 | ||
2986 | ||
2987 | static int ap_sta_ps_end(struct net_device *dev, struct sta_info *sta) | |
2988 | { | |
2989 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2990 | struct sk_buff *skb; | |
2991 | int sent = 0; | |
2992 | struct ieee80211_sub_if_data *sdata; | |
2993 | struct ieee80211_tx_packet_data *pkt_data; | |
2994 | ||
2995 | sdata = IEEE80211_DEV_TO_SUB_IF(sta->dev); | |
2996 | if (sdata->bss) | |
2997 | atomic_dec(&sdata->bss->num_sta_ps); | |
2998 | sta->flags &= ~(WLAN_STA_PS | WLAN_STA_TIM); | |
2999 | sta->pspoll = 0; | |
3000 | if (!skb_queue_empty(&sta->ps_tx_buf)) { | |
3001 | if (local->ops->set_tim) | |
3002 | local->ops->set_tim(local_to_hw(local), sta->aid, 0); | |
3003 | if (sdata->bss) | |
3004 | bss_tim_clear(local, sdata->bss, sta->aid); | |
3005 | } | |
3006 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG | |
3007 | printk(KERN_DEBUG "%s: STA " MAC_FMT " aid %d exits power " | |
3008 | "save mode\n", dev->name, MAC_ARG(sta->addr), sta->aid); | |
3009 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ | |
3010 | /* Send all buffered frames to the station */ | |
3011 | while ((skb = skb_dequeue(&sta->tx_filtered)) != NULL) { | |
3012 | pkt_data = (struct ieee80211_tx_packet_data *) skb->cb; | |
3013 | sent++; | |
3014 | pkt_data->requeue = 1; | |
3015 | dev_queue_xmit(skb); | |
3016 | } | |
3017 | while ((skb = skb_dequeue(&sta->ps_tx_buf)) != NULL) { | |
3018 | pkt_data = (struct ieee80211_tx_packet_data *) skb->cb; | |
3019 | local->total_ps_buffered--; | |
3020 | sent++; | |
3021 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG | |
3022 | printk(KERN_DEBUG "%s: STA " MAC_FMT " aid %d send PS frame " | |
3023 | "since STA not sleeping anymore\n", dev->name, | |
3024 | MAC_ARG(sta->addr), sta->aid); | |
3025 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ | |
3026 | pkt_data->requeue = 1; | |
3027 | dev_queue_xmit(skb); | |
3028 | } | |
3029 | ||
3030 | return sent; | |
3031 | } | |
3032 | ||
3033 | ||
3034 | static ieee80211_txrx_result | |
3035 | ieee80211_rx_h_ps_poll(struct ieee80211_txrx_data *rx) | |
3036 | { | |
3037 | struct sk_buff *skb; | |
3038 | int no_pending_pkts; | |
3039 | ||
3040 | if (likely(!rx->sta || | |
3041 | (rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_CTL || | |
3042 | (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_PSPOLL || | |
3043 | !rx->u.rx.ra_match)) | |
3044 | return TXRX_CONTINUE; | |
3045 | ||
3046 | skb = skb_dequeue(&rx->sta->tx_filtered); | |
3047 | if (!skb) { | |
3048 | skb = skb_dequeue(&rx->sta->ps_tx_buf); | |
3049 | if (skb) | |
3050 | rx->local->total_ps_buffered--; | |
3051 | } | |
3052 | no_pending_pkts = skb_queue_empty(&rx->sta->tx_filtered) && | |
3053 | skb_queue_empty(&rx->sta->ps_tx_buf); | |
3054 | ||
3055 | if (skb) { | |
3056 | struct ieee80211_hdr *hdr = | |
3057 | (struct ieee80211_hdr *) skb->data; | |
3058 | ||
3059 | /* tell TX path to send one frame even though the STA may | |
3060 | * still remain is PS mode after this frame exchange */ | |
3061 | rx->sta->pspoll = 1; | |
3062 | ||
3063 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG | |
3064 | printk(KERN_DEBUG "STA " MAC_FMT " aid %d: PS Poll (entries " | |
3065 | "after %d)\n", | |
3066 | MAC_ARG(rx->sta->addr), rx->sta->aid, | |
3067 | skb_queue_len(&rx->sta->ps_tx_buf)); | |
3068 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ | |
3069 | ||
3070 | /* Use MoreData flag to indicate whether there are more | |
3071 | * buffered frames for this STA */ | |
3072 | if (no_pending_pkts) { | |
3073 | hdr->frame_control &= cpu_to_le16(~IEEE80211_FCTL_MOREDATA); | |
3074 | rx->sta->flags &= ~WLAN_STA_TIM; | |
3075 | } else | |
3076 | hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
3077 | ||
3078 | dev_queue_xmit(skb); | |
3079 | ||
3080 | if (no_pending_pkts) { | |
3081 | if (rx->local->ops->set_tim) | |
3082 | rx->local->ops->set_tim(local_to_hw(rx->local), | |
3083 | rx->sta->aid, 0); | |
3084 | if (rx->sdata->bss) | |
3085 | bss_tim_clear(rx->local, rx->sdata->bss, rx->sta->aid); | |
3086 | } | |
3087 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG | |
3088 | } else if (!rx->u.rx.sent_ps_buffered) { | |
3089 | printk(KERN_DEBUG "%s: STA " MAC_FMT " sent PS Poll even " | |
3090 | "though there is no buffered frames for it\n", | |
3091 | rx->dev->name, MAC_ARG(rx->sta->addr)); | |
3092 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ | |
3093 | ||
3094 | } | |
3095 | ||
3096 | /* Free PS Poll skb here instead of returning TXRX_DROP that would | |
3097 | * count as an dropped frame. */ | |
3098 | dev_kfree_skb(rx->skb); | |
3099 | ||
3100 | return TXRX_QUEUED; | |
3101 | } | |
3102 | ||
3103 | ||
3104 | static inline struct ieee80211_fragment_entry * | |
3105 | ieee80211_reassemble_add(struct ieee80211_sub_if_data *sdata, | |
3106 | unsigned int frag, unsigned int seq, int rx_queue, | |
3107 | struct sk_buff **skb) | |
3108 | { | |
3109 | struct ieee80211_fragment_entry *entry; | |
3110 | int idx; | |
3111 | ||
3112 | idx = sdata->fragment_next; | |
3113 | entry = &sdata->fragments[sdata->fragment_next++]; | |
3114 | if (sdata->fragment_next >= IEEE80211_FRAGMENT_MAX) | |
3115 | sdata->fragment_next = 0; | |
3116 | ||
3117 | if (!skb_queue_empty(&entry->skb_list)) { | |
3118 | #ifdef CONFIG_MAC80211_DEBUG | |
3119 | struct ieee80211_hdr *hdr = | |
3120 | (struct ieee80211_hdr *) entry->skb_list.next->data; | |
3121 | printk(KERN_DEBUG "%s: RX reassembly removed oldest " | |
3122 | "fragment entry (idx=%d age=%lu seq=%d last_frag=%d " | |
3123 | "addr1=" MAC_FMT " addr2=" MAC_FMT "\n", | |
3124 | sdata->dev->name, idx, | |
3125 | jiffies - entry->first_frag_time, entry->seq, | |
3126 | entry->last_frag, MAC_ARG(hdr->addr1), | |
3127 | MAC_ARG(hdr->addr2)); | |
3128 | #endif /* CONFIG_MAC80211_DEBUG */ | |
3129 | __skb_queue_purge(&entry->skb_list); | |
3130 | } | |
3131 | ||
3132 | __skb_queue_tail(&entry->skb_list, *skb); /* no need for locking */ | |
3133 | *skb = NULL; | |
3134 | entry->first_frag_time = jiffies; | |
3135 | entry->seq = seq; | |
3136 | entry->rx_queue = rx_queue; | |
3137 | entry->last_frag = frag; | |
3138 | entry->ccmp = 0; | |
3139 | entry->extra_len = 0; | |
3140 | ||
3141 | return entry; | |
3142 | } | |
3143 | ||
3144 | ||
3145 | static inline struct ieee80211_fragment_entry * | |
3146 | ieee80211_reassemble_find(struct ieee80211_sub_if_data *sdata, | |
3147 | u16 fc, unsigned int frag, unsigned int seq, | |
3148 | int rx_queue, struct ieee80211_hdr *hdr) | |
3149 | { | |
3150 | struct ieee80211_fragment_entry *entry; | |
3151 | int i, idx; | |
3152 | ||
3153 | idx = sdata->fragment_next; | |
3154 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) { | |
3155 | struct ieee80211_hdr *f_hdr; | |
3156 | u16 f_fc; | |
3157 | ||
3158 | idx--; | |
3159 | if (idx < 0) | |
3160 | idx = IEEE80211_FRAGMENT_MAX - 1; | |
3161 | ||
3162 | entry = &sdata->fragments[idx]; | |
3163 | if (skb_queue_empty(&entry->skb_list) || entry->seq != seq || | |
3164 | entry->rx_queue != rx_queue || | |
3165 | entry->last_frag + 1 != frag) | |
3166 | continue; | |
3167 | ||
3168 | f_hdr = (struct ieee80211_hdr *) entry->skb_list.next->data; | |
3169 | f_fc = le16_to_cpu(f_hdr->frame_control); | |
3170 | ||
3171 | if ((fc & IEEE80211_FCTL_FTYPE) != (f_fc & IEEE80211_FCTL_FTYPE) || | |
3172 | compare_ether_addr(hdr->addr1, f_hdr->addr1) != 0 || | |
3173 | compare_ether_addr(hdr->addr2, f_hdr->addr2) != 0) | |
3174 | continue; | |
3175 | ||
3176 | if (entry->first_frag_time + 2 * HZ < jiffies) { | |
3177 | __skb_queue_purge(&entry->skb_list); | |
3178 | continue; | |
3179 | } | |
3180 | return entry; | |
3181 | } | |
3182 | ||
3183 | return NULL; | |
3184 | } | |
3185 | ||
3186 | ||
3187 | static ieee80211_txrx_result | |
3188 | ieee80211_rx_h_defragment(struct ieee80211_txrx_data *rx) | |
3189 | { | |
3190 | struct ieee80211_hdr *hdr; | |
3191 | u16 sc; | |
3192 | unsigned int frag, seq; | |
3193 | struct ieee80211_fragment_entry *entry; | |
3194 | struct sk_buff *skb; | |
3195 | ||
3196 | hdr = (struct ieee80211_hdr *) rx->skb->data; | |
3197 | sc = le16_to_cpu(hdr->seq_ctrl); | |
3198 | frag = sc & IEEE80211_SCTL_FRAG; | |
3199 | ||
3200 | if (likely((!(rx->fc & IEEE80211_FCTL_MOREFRAGS) && frag == 0) || | |
3201 | (rx->skb)->len < 24 || | |
3202 | is_multicast_ether_addr(hdr->addr1))) { | |
3203 | /* not fragmented */ | |
3204 | goto out; | |
3205 | } | |
3206 | I802_DEBUG_INC(rx->local->rx_handlers_fragments); | |
3207 | ||
3208 | seq = (sc & IEEE80211_SCTL_SEQ) >> 4; | |
3209 | ||
3210 | if (frag == 0) { | |
3211 | /* This is the first fragment of a new frame. */ | |
3212 | entry = ieee80211_reassemble_add(rx->sdata, frag, seq, | |
3213 | rx->u.rx.queue, &(rx->skb)); | |
3214 | if (rx->key && rx->key->alg == ALG_CCMP && | |
3215 | (rx->fc & IEEE80211_FCTL_PROTECTED)) { | |
3216 | /* Store CCMP PN so that we can verify that the next | |
3217 | * fragment has a sequential PN value. */ | |
3218 | entry->ccmp = 1; | |
3219 | memcpy(entry->last_pn, | |
3220 | rx->key->u.ccmp.rx_pn[rx->u.rx.queue], | |
3221 | CCMP_PN_LEN); | |
3222 | } | |
3223 | return TXRX_QUEUED; | |
3224 | } | |
3225 | ||
3226 | /* This is a fragment for a frame that should already be pending in | |
3227 | * fragment cache. Add this fragment to the end of the pending entry. | |
3228 | */ | |
3229 | entry = ieee80211_reassemble_find(rx->sdata, rx->fc, frag, seq, | |
3230 | rx->u.rx.queue, hdr); | |
3231 | if (!entry) { | |
3232 | I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag); | |
3233 | return TXRX_DROP; | |
3234 | } | |
3235 | ||
3236 | /* Verify that MPDUs within one MSDU have sequential PN values. | |
3237 | * (IEEE 802.11i, 8.3.3.4.5) */ | |
3238 | if (entry->ccmp) { | |
3239 | int i; | |
3240 | u8 pn[CCMP_PN_LEN], *rpn; | |
3241 | if (!rx->key || rx->key->alg != ALG_CCMP) | |
3242 | return TXRX_DROP; | |
3243 | memcpy(pn, entry->last_pn, CCMP_PN_LEN); | |
3244 | for (i = CCMP_PN_LEN - 1; i >= 0; i--) { | |
3245 | pn[i]++; | |
3246 | if (pn[i]) | |
3247 | break; | |
3248 | } | |
3249 | rpn = rx->key->u.ccmp.rx_pn[rx->u.rx.queue]; | |
3250 | if (memcmp(pn, rpn, CCMP_PN_LEN) != 0) { | |
3251 | printk(KERN_DEBUG "%s: defrag: CCMP PN not sequential" | |
3252 | " A2=" MAC_FMT " PN=%02x%02x%02x%02x%02x%02x " | |
3253 | "(expected %02x%02x%02x%02x%02x%02x)\n", | |
3254 | rx->dev->name, MAC_ARG(hdr->addr2), | |
3255 | rpn[0], rpn[1], rpn[2], rpn[3], rpn[4], rpn[5], | |
3256 | pn[0], pn[1], pn[2], pn[3], pn[4], pn[5]); | |
3257 | return TXRX_DROP; | |
3258 | } | |
3259 | memcpy(entry->last_pn, pn, CCMP_PN_LEN); | |
3260 | } | |
3261 | ||
3262 | skb_pull(rx->skb, ieee80211_get_hdrlen(rx->fc)); | |
3263 | __skb_queue_tail(&entry->skb_list, rx->skb); | |
3264 | entry->last_frag = frag; | |
3265 | entry->extra_len += rx->skb->len; | |
3266 | if (rx->fc & IEEE80211_FCTL_MOREFRAGS) { | |
3267 | rx->skb = NULL; | |
3268 | return TXRX_QUEUED; | |
3269 | } | |
3270 | ||
3271 | rx->skb = __skb_dequeue(&entry->skb_list); | |
3272 | if (skb_tailroom(rx->skb) < entry->extra_len) { | |
3273 | I802_DEBUG_INC(rx->local->rx_expand_skb_head2); | |
3274 | if (unlikely(pskb_expand_head(rx->skb, 0, entry->extra_len, | |
3275 | GFP_ATOMIC))) { | |
3276 | I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag); | |
3277 | __skb_queue_purge(&entry->skb_list); | |
3278 | return TXRX_DROP; | |
3279 | } | |
3280 | } | |
3281 | while ((skb = __skb_dequeue(&entry->skb_list))) | |
3282 | memcpy(skb_put(rx->skb, skb->len), skb->data, skb->len); | |
3283 | ||
3284 | /* Complete frame has been reassembled - process it now */ | |
3285 | rx->fragmented = 1; | |
3286 | ||
3287 | out: | |
3288 | if (rx->sta) | |
3289 | rx->sta->rx_packets++; | |
3290 | if (is_multicast_ether_addr(hdr->addr1)) | |
3291 | rx->local->dot11MulticastReceivedFrameCount++; | |
3292 | else | |
3293 | ieee80211_led_rx(rx->local); | |
3294 | return TXRX_CONTINUE; | |
3295 | } | |
3296 | ||
3297 | ||
3298 | static ieee80211_txrx_result | |
3299 | ieee80211_rx_h_monitor(struct ieee80211_txrx_data *rx) | |
3300 | { | |
3301 | if (rx->sdata->type == IEEE80211_IF_TYPE_MNTR) { | |
3302 | ieee80211_rx_monitor(rx->dev, rx->skb, rx->u.rx.status); | |
3303 | return TXRX_QUEUED; | |
3304 | } | |
3305 | ||
3306 | if (rx->u.rx.status->flag & RX_FLAG_RADIOTAP) | |
3307 | skb_pull(rx->skb, ieee80211_get_radiotap_len(rx->skb)); | |
3308 | ||
3309 | return TXRX_CONTINUE; | |
3310 | } | |
3311 | ||
3312 | ||
3313 | static ieee80211_txrx_result | |
3314 | ieee80211_rx_h_check(struct ieee80211_txrx_data *rx) | |
3315 | { | |
3316 | struct ieee80211_hdr *hdr; | |
3317 | int always_sta_key; | |
3318 | hdr = (struct ieee80211_hdr *) rx->skb->data; | |
3319 | ||
3320 | /* Drop duplicate 802.11 retransmissions (IEEE 802.11 Chap. 9.2.9) */ | |
3321 | if (rx->sta && !is_multicast_ether_addr(hdr->addr1)) { | |
3322 | if (unlikely(rx->fc & IEEE80211_FCTL_RETRY && | |
3323 | rx->sta->last_seq_ctrl[rx->u.rx.queue] == | |
3324 | hdr->seq_ctrl)) { | |
3325 | if (rx->u.rx.ra_match) { | |
3326 | rx->local->dot11FrameDuplicateCount++; | |
3327 | rx->sta->num_duplicates++; | |
3328 | } | |
3329 | return TXRX_DROP; | |
3330 | } else | |
3331 | rx->sta->last_seq_ctrl[rx->u.rx.queue] = hdr->seq_ctrl; | |
3332 | } | |
3333 | ||
3334 | if ((rx->local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) && | |
3335 | rx->skb->len > FCS_LEN) | |
3336 | skb_trim(rx->skb, rx->skb->len - FCS_LEN); | |
3337 | ||
3338 | if (unlikely(rx->skb->len < 16)) { | |
3339 | I802_DEBUG_INC(rx->local->rx_handlers_drop_short); | |
3340 | return TXRX_DROP; | |
3341 | } | |
3342 | ||
3343 | if (!rx->u.rx.ra_match) | |
3344 | rx->skb->pkt_type = PACKET_OTHERHOST; | |
3345 | else if (compare_ether_addr(rx->dev->dev_addr, hdr->addr1) == 0) | |
3346 | rx->skb->pkt_type = PACKET_HOST; | |
3347 | else if (is_multicast_ether_addr(hdr->addr1)) { | |
3348 | if (is_broadcast_ether_addr(hdr->addr1)) | |
3349 | rx->skb->pkt_type = PACKET_BROADCAST; | |
3350 | else | |
3351 | rx->skb->pkt_type = PACKET_MULTICAST; | |
3352 | } else | |
3353 | rx->skb->pkt_type = PACKET_OTHERHOST; | |
3354 | ||
3355 | /* Drop disallowed frame classes based on STA auth/assoc state; | |
3356 | * IEEE 802.11, Chap 5.5. | |
3357 | * | |
3358 | * 80211.o does filtering only based on association state, i.e., it | |
3359 | * drops Class 3 frames from not associated stations. hostapd sends | |
3360 | * deauth/disassoc frames when needed. In addition, hostapd is | |
3361 | * responsible for filtering on both auth and assoc states. | |
3362 | */ | |
3363 | if (unlikely(((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA || | |
3364 | ((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL && | |
3365 | (rx->fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PSPOLL)) && | |
3366 | rx->sdata->type != IEEE80211_IF_TYPE_IBSS && | |
3367 | (!rx->sta || !(rx->sta->flags & WLAN_STA_ASSOC)))) { | |
3368 | if ((!(rx->fc & IEEE80211_FCTL_FROMDS) && | |
3369 | !(rx->fc & IEEE80211_FCTL_TODS) && | |
3370 | (rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) | |
3371 | || !rx->u.rx.ra_match) { | |
3372 | /* Drop IBSS frames and frames for other hosts | |
3373 | * silently. */ | |
3374 | return TXRX_DROP; | |
3375 | } | |
3376 | ||
3377 | if (!rx->local->apdev) | |
3378 | return TXRX_DROP; | |
3379 | ||
3380 | ieee80211_rx_mgmt(rx->local, rx->skb, rx->u.rx.status, | |
3381 | ieee80211_msg_sta_not_assoc); | |
3382 | return TXRX_QUEUED; | |
3383 | } | |
3384 | ||
3385 | if (rx->sdata->type == IEEE80211_IF_TYPE_STA) | |
3386 | always_sta_key = 0; | |
3387 | else | |
3388 | always_sta_key = 1; | |
3389 | ||
3390 | if (rx->sta && rx->sta->key && always_sta_key) { | |
3391 | rx->key = rx->sta->key; | |
3392 | } else { | |
3393 | if (rx->sta && rx->sta->key) | |
3394 | rx->key = rx->sta->key; | |
3395 | else | |
3396 | rx->key = rx->sdata->default_key; | |
3397 | ||
3398 | if ((rx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) && | |
3399 | rx->fc & IEEE80211_FCTL_PROTECTED) { | |
3400 | int keyidx = ieee80211_wep_get_keyidx(rx->skb); | |
3401 | ||
3402 | if (keyidx >= 0 && keyidx < NUM_DEFAULT_KEYS && | |
3403 | (!rx->sta || !rx->sta->key || keyidx > 0)) | |
3404 | rx->key = rx->sdata->keys[keyidx]; | |
3405 | ||
3406 | if (!rx->key) { | |
3407 | if (!rx->u.rx.ra_match) | |
3408 | return TXRX_DROP; | |
3409 | printk(KERN_DEBUG "%s: RX WEP frame with " | |
3410 | "unknown keyidx %d (A1=" MAC_FMT " A2=" | |
3411 | MAC_FMT " A3=" MAC_FMT ")\n", | |
3412 | rx->dev->name, keyidx, | |
3413 | MAC_ARG(hdr->addr1), | |
3414 | MAC_ARG(hdr->addr2), | |
3415 | MAC_ARG(hdr->addr3)); | |
3416 | if (!rx->local->apdev) | |
3417 | return TXRX_DROP; | |
3418 | ieee80211_rx_mgmt( | |
3419 | rx->local, rx->skb, rx->u.rx.status, | |
3420 | ieee80211_msg_wep_frame_unknown_key); | |
3421 | return TXRX_QUEUED; | |
3422 | } | |
3423 | } | |
3424 | } | |
3425 | ||
3426 | if (rx->fc & IEEE80211_FCTL_PROTECTED && rx->key && rx->u.rx.ra_match) { | |
3427 | rx->key->tx_rx_count++; | |
3428 | if (unlikely(rx->local->key_tx_rx_threshold && | |
3429 | rx->key->tx_rx_count > | |
3430 | rx->local->key_tx_rx_threshold)) { | |
3431 | ieee80211_key_threshold_notify(rx->dev, rx->key, | |
3432 | rx->sta); | |
3433 | } | |
3434 | } | |
3435 | ||
3436 | return TXRX_CONTINUE; | |
3437 | } | |
3438 | ||
3439 | ||
3440 | static ieee80211_txrx_result | |
3441 | ieee80211_rx_h_sta_process(struct ieee80211_txrx_data *rx) | |
3442 | { | |
3443 | struct sta_info *sta = rx->sta; | |
3444 | struct net_device *dev = rx->dev; | |
3445 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) rx->skb->data; | |
3446 | ||
3447 | if (!sta) | |
3448 | return TXRX_CONTINUE; | |
3449 | ||
3450 | /* Update last_rx only for IBSS packets which are for the current | |
3451 | * BSSID to avoid keeping the current IBSS network alive in cases where | |
3452 | * other STAs are using different BSSID. */ | |
3453 | if (rx->sdata->type == IEEE80211_IF_TYPE_IBSS) { | |
3454 | u8 *bssid = ieee80211_get_bssid(hdr, rx->skb->len); | |
3455 | if (compare_ether_addr(bssid, rx->sdata->u.sta.bssid) == 0) | |
3456 | sta->last_rx = jiffies; | |
3457 | } else | |
3458 | if (!is_multicast_ether_addr(hdr->addr1) || | |
3459 | rx->sdata->type == IEEE80211_IF_TYPE_STA) { | |
3460 | /* Update last_rx only for unicast frames in order to prevent | |
3461 | * the Probe Request frames (the only broadcast frames from a | |
3462 | * STA in infrastructure mode) from keeping a connection alive. | |
3463 | */ | |
3464 | sta->last_rx = jiffies; | |
3465 | } | |
3466 | ||
3467 | if (!rx->u.rx.ra_match) | |
3468 | return TXRX_CONTINUE; | |
3469 | ||
3470 | sta->rx_fragments++; | |
3471 | sta->rx_bytes += rx->skb->len; | |
3472 | sta->last_rssi = (sta->last_rssi * 15 + | |
3473 | rx->u.rx.status->ssi) / 16; | |
3474 | sta->last_signal = (sta->last_signal * 15 + | |
3475 | rx->u.rx.status->signal) / 16; | |
3476 | sta->last_noise = (sta->last_noise * 15 + | |
3477 | rx->u.rx.status->noise) / 16; | |
3478 | ||
3479 | if (!(rx->fc & IEEE80211_FCTL_MOREFRAGS)) { | |
3480 | /* Change STA power saving mode only in the end of a frame | |
3481 | * exchange sequence */ | |
3482 | if ((sta->flags & WLAN_STA_PS) && !(rx->fc & IEEE80211_FCTL_PM)) | |
3483 | rx->u.rx.sent_ps_buffered += ap_sta_ps_end(dev, sta); | |
3484 | else if (!(sta->flags & WLAN_STA_PS) && | |
3485 | (rx->fc & IEEE80211_FCTL_PM)) | |
3486 | ap_sta_ps_start(dev, sta); | |
3487 | } | |
3488 | ||
3489 | /* Drop data::nullfunc frames silently, since they are used only to | |
3490 | * control station power saving mode. */ | |
3491 | if ((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA && | |
3492 | (rx->fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_NULLFUNC) { | |
3493 | I802_DEBUG_INC(rx->local->rx_handlers_drop_nullfunc); | |
3494 | /* Update counter and free packet here to avoid counting this | |
3495 | * as a dropped packed. */ | |
3496 | sta->rx_packets++; | |
3497 | dev_kfree_skb(rx->skb); | |
3498 | return TXRX_QUEUED; | |
3499 | } | |
3500 | ||
3501 | return TXRX_CONTINUE; | |
3502 | } /* ieee80211_rx_h_sta_process */ | |
3503 | ||
3504 | ||
3505 | static ieee80211_txrx_result | |
3506 | ieee80211_rx_h_wep_weak_iv_detection(struct ieee80211_txrx_data *rx) | |
3507 | { | |
3508 | if (!rx->sta || !(rx->fc & IEEE80211_FCTL_PROTECTED) || | |
3509 | (rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA || | |
3510 | !rx->key || rx->key->alg != ALG_WEP || !rx->u.rx.ra_match) | |
3511 | return TXRX_CONTINUE; | |
3512 | ||
3513 | /* Check for weak IVs, if hwaccel did not remove IV from the frame */ | |
3514 | if ((rx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) || | |
3515 | rx->key->force_sw_encrypt) { | |
3516 | u8 *iv = ieee80211_wep_is_weak_iv(rx->skb, rx->key); | |
3517 | if (iv) { | |
3518 | rx->sta->wep_weak_iv_count++; | |
3519 | } | |
3520 | } | |
3521 | ||
3522 | return TXRX_CONTINUE; | |
3523 | } | |
3524 | ||
3525 | ||
3526 | static ieee80211_txrx_result | |
3527 | ieee80211_rx_h_wep_decrypt(struct ieee80211_txrx_data *rx) | |
3528 | { | |
3529 | /* If the device handles decryption totally, skip this test */ | |
3530 | if (rx->local->hw.flags & IEEE80211_HW_DEVICE_HIDES_WEP) | |
3531 | return TXRX_CONTINUE; | |
3532 | ||
3533 | if ((rx->key && rx->key->alg != ALG_WEP) || | |
3534 | !(rx->fc & IEEE80211_FCTL_PROTECTED) || | |
3535 | ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA && | |
3536 | ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT || | |
3537 | (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_AUTH))) | |
3538 | return TXRX_CONTINUE; | |
3539 | ||
3540 | if (!rx->key) { | |
3541 | printk(KERN_DEBUG "%s: RX WEP frame, but no key set\n", | |
3542 | rx->dev->name); | |
3543 | return TXRX_DROP; | |
3544 | } | |
3545 | ||
3546 | if (!(rx->u.rx.status->flag & RX_FLAG_DECRYPTED) || | |
3547 | rx->key->force_sw_encrypt) { | |
3548 | if (ieee80211_wep_decrypt(rx->local, rx->skb, rx->key)) { | |
3549 | printk(KERN_DEBUG "%s: RX WEP frame, decrypt " | |
3550 | "failed\n", rx->dev->name); | |
3551 | return TXRX_DROP; | |
3552 | } | |
3553 | } else if (rx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) { | |
3554 | ieee80211_wep_remove_iv(rx->local, rx->skb, rx->key); | |
3555 | /* remove ICV */ | |
3556 | skb_trim(rx->skb, rx->skb->len - 4); | |
3557 | } | |
3558 | ||
3559 | return TXRX_CONTINUE; | |
3560 | } | |
3561 | ||
3562 | ||
3563 | static ieee80211_txrx_result | |
3564 | ieee80211_rx_h_802_1x_pae(struct ieee80211_txrx_data *rx) | |
3565 | { | |
3566 | if (rx->sdata->eapol && ieee80211_is_eapol(rx->skb) && | |
3567 | rx->sdata->type != IEEE80211_IF_TYPE_STA && rx->u.rx.ra_match) { | |
3568 | /* Pass both encrypted and unencrypted EAPOL frames to user | |
3569 | * space for processing. */ | |
3570 | if (!rx->local->apdev) | |
3571 | return TXRX_DROP; | |
3572 | ieee80211_rx_mgmt(rx->local, rx->skb, rx->u.rx.status, | |
3573 | ieee80211_msg_normal); | |
3574 | return TXRX_QUEUED; | |
3575 | } | |
3576 | ||
3577 | if (unlikely(rx->sdata->ieee802_1x && | |
3578 | (rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA && | |
3579 | (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_NULLFUNC && | |
3580 | (!rx->sta || !(rx->sta->flags & WLAN_STA_AUTHORIZED)) && | |
3581 | !ieee80211_is_eapol(rx->skb))) { | |
3582 | #ifdef CONFIG_MAC80211_DEBUG | |
3583 | struct ieee80211_hdr *hdr = | |
3584 | (struct ieee80211_hdr *) rx->skb->data; | |
3585 | printk(KERN_DEBUG "%s: dropped frame from " MAC_FMT | |
3586 | " (unauthorized port)\n", rx->dev->name, | |
3587 | MAC_ARG(hdr->addr2)); | |
3588 | #endif /* CONFIG_MAC80211_DEBUG */ | |
3589 | return TXRX_DROP; | |
3590 | } | |
3591 | ||
3592 | return TXRX_CONTINUE; | |
3593 | } | |
3594 | ||
3595 | ||
3596 | static ieee80211_txrx_result | |
3597 | ieee80211_rx_h_drop_unencrypted(struct ieee80211_txrx_data *rx) | |
3598 | { | |
3599 | /* If the device handles decryption totally, skip this test */ | |
3600 | if (rx->local->hw.flags & IEEE80211_HW_DEVICE_HIDES_WEP) | |
3601 | return TXRX_CONTINUE; | |
3602 | ||
3603 | /* Drop unencrypted frames if key is set. */ | |
3604 | if (unlikely(!(rx->fc & IEEE80211_FCTL_PROTECTED) && | |
3605 | (rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA && | |
3606 | (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_NULLFUNC && | |
3607 | (rx->key || rx->sdata->drop_unencrypted) && | |
3608 | (rx->sdata->eapol == 0 || | |
3609 | !ieee80211_is_eapol(rx->skb)))) { | |
3610 | printk(KERN_DEBUG "%s: RX non-WEP frame, but expected " | |
3611 | "encryption\n", rx->dev->name); | |
3612 | return TXRX_DROP; | |
3613 | } | |
3614 | return TXRX_CONTINUE; | |
3615 | } | |
3616 | ||
3617 | ||
3618 | static ieee80211_txrx_result | |
3619 | ieee80211_rx_h_mgmt(struct ieee80211_txrx_data *rx) | |
3620 | { | |
3621 | struct ieee80211_sub_if_data *sdata; | |
3622 | ||
3623 | if (!rx->u.rx.ra_match) | |
3624 | return TXRX_DROP; | |
3625 | ||
3626 | sdata = IEEE80211_DEV_TO_SUB_IF(rx->dev); | |
3627 | if ((sdata->type == IEEE80211_IF_TYPE_STA || | |
3628 | sdata->type == IEEE80211_IF_TYPE_IBSS) && | |
3629 | !rx->local->user_space_mlme) { | |
3630 | ieee80211_sta_rx_mgmt(rx->dev, rx->skb, rx->u.rx.status); | |
3631 | } else { | |
3632 | /* Management frames are sent to hostapd for processing */ | |
3633 | if (!rx->local->apdev) | |
3634 | return TXRX_DROP; | |
3635 | ieee80211_rx_mgmt(rx->local, rx->skb, rx->u.rx.status, | |
3636 | ieee80211_msg_normal); | |
3637 | } | |
3638 | return TXRX_QUEUED; | |
3639 | } | |
3640 | ||
3641 | ||
3642 | static ieee80211_txrx_result | |
3643 | ieee80211_rx_h_passive_scan(struct ieee80211_txrx_data *rx) | |
3644 | { | |
3645 | struct ieee80211_local *local = rx->local; | |
3646 | struct sk_buff *skb = rx->skb; | |
3647 | ||
3648 | if (unlikely(local->sta_scanning != 0)) { | |
3649 | ieee80211_sta_rx_scan(rx->dev, skb, rx->u.rx.status); | |
3650 | return TXRX_QUEUED; | |
3651 | } | |
3652 | ||
3653 | if (unlikely(rx->u.rx.in_scan)) { | |
3654 | /* scanning finished during invoking of handlers */ | |
3655 | I802_DEBUG_INC(local->rx_handlers_drop_passive_scan); | |
3656 | return TXRX_DROP; | |
3657 | } | |
3658 | ||
3659 | return TXRX_CONTINUE; | |
3660 | } | |
3661 | ||
3662 | ||
3663 | static void ieee80211_rx_michael_mic_report(struct net_device *dev, | |
3664 | struct ieee80211_hdr *hdr, | |
3665 | struct sta_info *sta, | |
3666 | struct ieee80211_txrx_data *rx) | |
3667 | { | |
3668 | int keyidx, hdrlen; | |
3669 | ||
3670 | hdrlen = ieee80211_get_hdrlen_from_skb(rx->skb); | |
3671 | if (rx->skb->len >= hdrlen + 4) | |
3672 | keyidx = rx->skb->data[hdrlen + 3] >> 6; | |
3673 | else | |
3674 | keyidx = -1; | |
3675 | ||
3676 | /* TODO: verify that this is not triggered by fragmented | |
3677 | * frames (hw does not verify MIC for them). */ | |
3678 | printk(KERN_DEBUG "%s: TKIP hwaccel reported Michael MIC " | |
3679 | "failure from " MAC_FMT " to " MAC_FMT " keyidx=%d\n", | |
3680 | dev->name, MAC_ARG(hdr->addr2), MAC_ARG(hdr->addr1), keyidx); | |
3681 | ||
3682 | if (!sta) { | |
3683 | /* Some hardware versions seem to generate incorrect | |
3684 | * Michael MIC reports; ignore them to avoid triggering | |
3685 | * countermeasures. */ | |
3686 | printk(KERN_DEBUG "%s: ignored spurious Michael MIC " | |
3687 | "error for unknown address " MAC_FMT "\n", | |
3688 | dev->name, MAC_ARG(hdr->addr2)); | |
3689 | goto ignore; | |
3690 | } | |
3691 | ||
3692 | if (!(rx->fc & IEEE80211_FCTL_PROTECTED)) { | |
3693 | printk(KERN_DEBUG "%s: ignored spurious Michael MIC " | |
3694 | "error for a frame with no ISWEP flag (src " | |
3695 | MAC_FMT ")\n", dev->name, MAC_ARG(hdr->addr2)); | |
3696 | goto ignore; | |
3697 | } | |
3698 | ||
3699 | if ((rx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) && | |
3700 | rx->sdata->type == IEEE80211_IF_TYPE_AP) { | |
3701 | keyidx = ieee80211_wep_get_keyidx(rx->skb); | |
3702 | /* AP with Pairwise keys support should never receive Michael | |
3703 | * MIC errors for non-zero keyidx because these are reserved | |
3704 | * for group keys and only the AP is sending real multicast | |
3705 | * frames in BSS. */ | |
3706 | if (keyidx) { | |
3707 | printk(KERN_DEBUG "%s: ignored Michael MIC error for " | |
3708 | "a frame with non-zero keyidx (%d) (src " MAC_FMT | |
3709 | ")\n", dev->name, keyidx, MAC_ARG(hdr->addr2)); | |
3710 | goto ignore; | |
3711 | } | |
3712 | } | |
3713 | ||
3714 | if ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA && | |
3715 | ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT || | |
3716 | (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_AUTH)) { | |
3717 | printk(KERN_DEBUG "%s: ignored spurious Michael MIC " | |
3718 | "error for a frame that cannot be encrypted " | |
3719 | "(fc=0x%04x) (src " MAC_FMT ")\n", | |
3720 | dev->name, rx->fc, MAC_ARG(hdr->addr2)); | |
3721 | goto ignore; | |
3722 | } | |
3723 | ||
3724 | do { | |
3725 | union iwreq_data wrqu; | |
3726 | char *buf = kmalloc(128, GFP_ATOMIC); | |
3727 | if (!buf) | |
3728 | break; | |
3729 | ||
3730 | /* TODO: needed parameters: count, key type, TSC */ | |
3731 | sprintf(buf, "MLME-MICHAELMICFAILURE.indication(" | |
3732 | "keyid=%d %scast addr=" MAC_FMT ")", | |
3733 | keyidx, hdr->addr1[0] & 0x01 ? "broad" : "uni", | |
3734 | MAC_ARG(hdr->addr2)); | |
3735 | memset(&wrqu, 0, sizeof(wrqu)); | |
3736 | wrqu.data.length = strlen(buf); | |
3737 | wireless_send_event(rx->dev, IWEVCUSTOM, &wrqu, buf); | |
3738 | kfree(buf); | |
3739 | } while (0); | |
3740 | ||
3741 | /* TODO: consider verifying the MIC error report with software | |
3742 | * implementation if we get too many spurious reports from the | |
3743 | * hardware. */ | |
3744 | if (!rx->local->apdev) | |
3745 | goto ignore; | |
3746 | ieee80211_rx_mgmt(rx->local, rx->skb, rx->u.rx.status, | |
3747 | ieee80211_msg_michael_mic_failure); | |
3748 | return; | |
3749 | ||
3750 | ignore: | |
3751 | dev_kfree_skb(rx->skb); | |
3752 | rx->skb = NULL; | |
3753 | } | |
3754 | ||
3755 | static inline ieee80211_txrx_result __ieee80211_invoke_rx_handlers( | |
3756 | struct ieee80211_local *local, | |
3757 | ieee80211_rx_handler *handlers, | |
3758 | struct ieee80211_txrx_data *rx, | |
3759 | struct sta_info *sta) | |
3760 | { | |
3761 | ieee80211_rx_handler *handler; | |
3762 | ieee80211_txrx_result res = TXRX_DROP; | |
3763 | ||
3764 | for (handler = handlers; *handler != NULL; handler++) { | |
3765 | res = (*handler)(rx); | |
3766 | if (res != TXRX_CONTINUE) { | |
3767 | if (res == TXRX_DROP) { | |
3768 | I802_DEBUG_INC(local->rx_handlers_drop); | |
3769 | if (sta) | |
3770 | sta->rx_dropped++; | |
3771 | } | |
3772 | if (res == TXRX_QUEUED) | |
3773 | I802_DEBUG_INC(local->rx_handlers_queued); | |
3774 | break; | |
3775 | } | |
3776 | } | |
3777 | ||
3778 | if (res == TXRX_DROP) { | |
3779 | dev_kfree_skb(rx->skb); | |
3780 | } | |
3781 | return res; | |
3782 | } | |
3783 | ||
3784 | static inline void ieee80211_invoke_rx_handlers(struct ieee80211_local *local, | |
3785 | ieee80211_rx_handler *handlers, | |
3786 | struct ieee80211_txrx_data *rx, | |
3787 | struct sta_info *sta) | |
3788 | { | |
3789 | if (__ieee80211_invoke_rx_handlers(local, handlers, rx, sta) == | |
3790 | TXRX_CONTINUE) | |
3791 | dev_kfree_skb(rx->skb); | |
3792 | } | |
3793 | ||
3794 | /* | |
3795 | * This is the receive path handler. It is called by a low level driver when an | |
3796 | * 802.11 MPDU is received from the hardware. | |
3797 | */ | |
3798 | void __ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb, | |
3799 | struct ieee80211_rx_status *status) | |
3800 | { | |
3801 | struct ieee80211_local *local = hw_to_local(hw); | |
3802 | struct ieee80211_sub_if_data *sdata; | |
3803 | struct sta_info *sta; | |
3804 | struct ieee80211_hdr *hdr; | |
3805 | struct ieee80211_txrx_data rx; | |
3806 | u16 type; | |
3807 | int multicast; | |
3808 | int radiotap_len = 0; | |
3809 | ||
3810 | if (status->flag & RX_FLAG_RADIOTAP) { | |
3811 | radiotap_len = ieee80211_get_radiotap_len(skb); | |
3812 | skb_pull(skb, radiotap_len); | |
3813 | } | |
3814 | ||
3815 | hdr = (struct ieee80211_hdr *) skb->data; | |
3816 | memset(&rx, 0, sizeof(rx)); | |
3817 | rx.skb = skb; | |
3818 | rx.local = local; | |
3819 | ||
3820 | rx.u.rx.status = status; | |
3821 | rx.fc = skb->len >= 2 ? le16_to_cpu(hdr->frame_control) : 0; | |
3822 | type = rx.fc & IEEE80211_FCTL_FTYPE; | |
3823 | if (type == IEEE80211_FTYPE_DATA || type == IEEE80211_FTYPE_MGMT) | |
3824 | local->dot11ReceivedFragmentCount++; | |
3825 | multicast = is_multicast_ether_addr(hdr->addr1); | |
3826 | ||
3827 | if (skb->len >= 16) | |
3828 | sta = rx.sta = sta_info_get(local, hdr->addr2); | |
3829 | else | |
3830 | sta = rx.sta = NULL; | |
3831 | ||
3832 | if (sta) { | |
3833 | rx.dev = sta->dev; | |
3834 | rx.sdata = IEEE80211_DEV_TO_SUB_IF(rx.dev); | |
3835 | } | |
3836 | ||
3837 | if ((status->flag & RX_FLAG_MMIC_ERROR)) { | |
3838 | ieee80211_rx_michael_mic_report(local->mdev, hdr, sta, &rx); | |
3839 | goto end; | |
3840 | } | |
3841 | ||
3842 | if (unlikely(local->sta_scanning)) | |
3843 | rx.u.rx.in_scan = 1; | |
3844 | ||
3845 | if (__ieee80211_invoke_rx_handlers(local, local->rx_pre_handlers, &rx, | |
3846 | sta) != TXRX_CONTINUE) | |
3847 | goto end; | |
3848 | skb = rx.skb; | |
3849 | ||
3850 | skb_push(skb, radiotap_len); | |
3851 | if (sta && !sta->assoc_ap && !(sta->flags & WLAN_STA_WDS) && | |
3852 | !local->iff_promiscs && !multicast) { | |
3853 | rx.u.rx.ra_match = 1; | |
3854 | ieee80211_invoke_rx_handlers(local, local->rx_handlers, &rx, | |
3855 | sta); | |
3856 | } else { | |
3857 | struct ieee80211_sub_if_data *prev = NULL; | |
3858 | struct sk_buff *skb_new; | |
3859 | u8 *bssid = ieee80211_get_bssid(hdr, skb->len - radiotap_len); | |
3860 | ||
3861 | read_lock(&local->sub_if_lock); | |
3862 | list_for_each_entry(sdata, &local->sub_if_list, list) { | |
3863 | rx.u.rx.ra_match = 1; | |
3864 | switch (sdata->type) { | |
3865 | case IEEE80211_IF_TYPE_STA: | |
3866 | if (!bssid) | |
3867 | continue; | |
3868 | if (!ieee80211_bssid_match(bssid, | |
3869 | sdata->u.sta.bssid)) { | |
3870 | if (!rx.u.rx.in_scan) | |
3871 | continue; | |
3872 | rx.u.rx.ra_match = 0; | |
3873 | } else if (!multicast && | |
3874 | compare_ether_addr(sdata->dev->dev_addr, | |
3875 | hdr->addr1) != 0) { | |
3876 | if (!sdata->promisc) | |
3877 | continue; | |
3878 | rx.u.rx.ra_match = 0; | |
3879 | } | |
3880 | break; | |
3881 | case IEEE80211_IF_TYPE_IBSS: | |
3882 | if (!bssid) | |
3883 | continue; | |
3884 | if (!ieee80211_bssid_match(bssid, | |
3885 | sdata->u.sta.bssid)) { | |
3886 | if (!rx.u.rx.in_scan) | |
3887 | continue; | |
3888 | rx.u.rx.ra_match = 0; | |
3889 | } else if (!multicast && | |
3890 | compare_ether_addr(sdata->dev->dev_addr, | |
3891 | hdr->addr1) != 0) { | |
3892 | if (!sdata->promisc) | |
3893 | continue; | |
3894 | rx.u.rx.ra_match = 0; | |
3895 | } else if (!sta) | |
3896 | sta = rx.sta = | |
3897 | ieee80211_ibss_add_sta(sdata->dev, | |
3898 | skb, bssid, | |
3899 | hdr->addr2); | |
3900 | break; | |
3901 | case IEEE80211_IF_TYPE_AP: | |
3902 | if (!bssid) { | |
3903 | if (compare_ether_addr(sdata->dev->dev_addr, | |
3904 | hdr->addr1) != 0) | |
3905 | continue; | |
3906 | } else if (!ieee80211_bssid_match(bssid, | |
3907 | sdata->dev->dev_addr)) { | |
3908 | if (!rx.u.rx.in_scan) | |
3909 | continue; | |
3910 | rx.u.rx.ra_match = 0; | |
3911 | } | |
3912 | if (sdata->dev == local->mdev && | |
3913 | !rx.u.rx.in_scan) | |
3914 | /* do not receive anything via | |
3915 | * master device when not scanning */ | |
3916 | continue; | |
3917 | break; | |
3918 | case IEEE80211_IF_TYPE_WDS: | |
3919 | if (bssid || | |
3920 | (rx.fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) | |
3921 | continue; | |
3922 | if (compare_ether_addr(sdata->u.wds.remote_addr, | |
3923 | hdr->addr2) != 0) | |
3924 | continue; | |
3925 | break; | |
3926 | } | |
3927 | ||
3928 | if (prev) { | |
3929 | skb_new = skb_copy(skb, GFP_ATOMIC); | |
3930 | if (!skb_new) { | |
3931 | if (net_ratelimit()) | |
3932 | printk(KERN_DEBUG "%s: failed to copy " | |
3933 | "multicast frame for %s", | |
3934 | local->mdev->name, prev->dev->name); | |
3935 | continue; | |
3936 | } | |
3937 | rx.skb = skb_new; | |
3938 | rx.dev = prev->dev; | |
3939 | rx.sdata = prev; | |
3940 | ieee80211_invoke_rx_handlers(local, | |
3941 | local->rx_handlers, | |
3942 | &rx, sta); | |
3943 | } | |
3944 | prev = sdata; | |
3945 | } | |
3946 | if (prev) { | |
3947 | rx.skb = skb; | |
3948 | rx.dev = prev->dev; | |
3949 | rx.sdata = prev; | |
3950 | ieee80211_invoke_rx_handlers(local, local->rx_handlers, | |
3951 | &rx, sta); | |
3952 | } else | |
3953 | dev_kfree_skb(skb); | |
3954 | read_unlock(&local->sub_if_lock); | |
3955 | } | |
3956 | ||
3957 | end: | |
3958 | if (sta) | |
3959 | sta_info_put(sta); | |
3960 | } | |
3961 | EXPORT_SYMBOL(__ieee80211_rx); | |
3962 | ||
3963 | static ieee80211_txrx_result | |
3964 | ieee80211_tx_h_load_stats(struct ieee80211_txrx_data *tx) | |
3965 | { | |
3966 | struct ieee80211_local *local = tx->local; | |
3967 | struct ieee80211_hw_mode *mode = tx->u.tx.mode; | |
3968 | struct sk_buff *skb = tx->skb; | |
3969 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
3970 | u32 load = 0, hdrtime; | |
3971 | ||
3972 | /* TODO: this could be part of tx_status handling, so that the number | |
3973 | * of retries would be known; TX rate should in that case be stored | |
3974 | * somewhere with the packet */ | |
3975 | ||
3976 | /* Estimate total channel use caused by this frame */ | |
3977 | ||
3978 | /* 1 bit at 1 Mbit/s takes 1 usec; in channel_use values, | |
3979 | * 1 usec = 1/8 * (1080 / 10) = 13.5 */ | |
3980 | ||
3981 | if (mode->mode == MODE_IEEE80211A || | |
3982 | mode->mode == MODE_ATHEROS_TURBO || | |
3983 | mode->mode == MODE_ATHEROS_TURBOG || | |
3984 | (mode->mode == MODE_IEEE80211G && | |
3985 | tx->u.tx.rate->flags & IEEE80211_RATE_ERP)) | |
3986 | hdrtime = CHAN_UTIL_HDR_SHORT; | |
3987 | else | |
3988 | hdrtime = CHAN_UTIL_HDR_LONG; | |
3989 | ||
3990 | load = hdrtime; | |
3991 | if (!is_multicast_ether_addr(hdr->addr1)) | |
3992 | load += hdrtime; | |
3993 | ||
3994 | if (tx->u.tx.control->flags & IEEE80211_TXCTL_USE_RTS_CTS) | |
3995 | load += 2 * hdrtime; | |
3996 | else if (tx->u.tx.control->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) | |
3997 | load += hdrtime; | |
3998 | ||
3999 | load += skb->len * tx->u.tx.rate->rate_inv; | |
4000 | ||
4001 | if (tx->u.tx.extra_frag) { | |
4002 | int i; | |
4003 | for (i = 0; i < tx->u.tx.num_extra_frag; i++) { | |
4004 | load += 2 * hdrtime; | |
4005 | load += tx->u.tx.extra_frag[i]->len * | |
4006 | tx->u.tx.rate->rate; | |
4007 | } | |
4008 | } | |
4009 | ||
4010 | /* Divide channel_use by 8 to avoid wrapping around the counter */ | |
4011 | load >>= CHAN_UTIL_SHIFT; | |
4012 | local->channel_use_raw += load; | |
4013 | if (tx->sta) | |
4014 | tx->sta->channel_use_raw += load; | |
4015 | tx->sdata->channel_use_raw += load; | |
4016 | ||
4017 | return TXRX_CONTINUE; | |
4018 | } | |
4019 | ||
4020 | ||
4021 | static ieee80211_txrx_result | |
4022 | ieee80211_rx_h_load_stats(struct ieee80211_txrx_data *rx) | |
4023 | { | |
4024 | struct ieee80211_local *local = rx->local; | |
4025 | struct sk_buff *skb = rx->skb; | |
4026 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
4027 | u32 load = 0, hdrtime; | |
4028 | struct ieee80211_rate *rate; | |
4029 | struct ieee80211_hw_mode *mode = local->hw.conf.mode; | |
4030 | int i; | |
4031 | ||
4032 | /* Estimate total channel use caused by this frame */ | |
4033 | ||
4034 | if (unlikely(mode->num_rates < 0)) | |
4035 | return TXRX_CONTINUE; | |
4036 | ||
4037 | rate = &mode->rates[0]; | |
4038 | for (i = 0; i < mode->num_rates; i++) { | |
4039 | if (mode->rates[i].val == rx->u.rx.status->rate) { | |
4040 | rate = &mode->rates[i]; | |
4041 | break; | |
4042 | } | |
4043 | } | |
4044 | ||
4045 | /* 1 bit at 1 Mbit/s takes 1 usec; in channel_use values, | |
4046 | * 1 usec = 1/8 * (1080 / 10) = 13.5 */ | |
4047 | ||
4048 | if (mode->mode == MODE_IEEE80211A || | |
4049 | mode->mode == MODE_ATHEROS_TURBO || | |
4050 | mode->mode == MODE_ATHEROS_TURBOG || | |
4051 | (mode->mode == MODE_IEEE80211G && | |
4052 | rate->flags & IEEE80211_RATE_ERP)) | |
4053 | hdrtime = CHAN_UTIL_HDR_SHORT; | |
4054 | else | |
4055 | hdrtime = CHAN_UTIL_HDR_LONG; | |
4056 | ||
4057 | load = hdrtime; | |
4058 | if (!is_multicast_ether_addr(hdr->addr1)) | |
4059 | load += hdrtime; | |
4060 | ||
4061 | load += skb->len * rate->rate_inv; | |
4062 | ||
4063 | /* Divide channel_use by 8 to avoid wrapping around the counter */ | |
4064 | load >>= CHAN_UTIL_SHIFT; | |
4065 | local->channel_use_raw += load; | |
4066 | if (rx->sta) | |
4067 | rx->sta->channel_use_raw += load; | |
4068 | rx->u.rx.load = load; | |
4069 | ||
4070 | return TXRX_CONTINUE; | |
4071 | } | |
4072 | ||
4073 | static ieee80211_txrx_result | |
4074 | ieee80211_rx_h_if_stats(struct ieee80211_txrx_data *rx) | |
4075 | { | |
4076 | rx->sdata->channel_use_raw += rx->u.rx.load; | |
4077 | return TXRX_CONTINUE; | |
4078 | } | |
4079 | ||
4080 | static void ieee80211_stat_refresh(unsigned long data) | |
4081 | { | |
4082 | struct ieee80211_local *local = (struct ieee80211_local *) data; | |
4083 | struct sta_info *sta; | |
4084 | struct ieee80211_sub_if_data *sdata; | |
4085 | ||
4086 | if (!local->stat_time) | |
4087 | return; | |
4088 | ||
4089 | /* go through all stations */ | |
4090 | spin_lock_bh(&local->sta_lock); | |
4091 | list_for_each_entry(sta, &local->sta_list, list) { | |
4092 | sta->channel_use = (sta->channel_use_raw / local->stat_time) / | |
4093 | CHAN_UTIL_PER_10MS; | |
4094 | sta->channel_use_raw = 0; | |
4095 | } | |
4096 | spin_unlock_bh(&local->sta_lock); | |
4097 | ||
4098 | /* go through all subinterfaces */ | |
4099 | read_lock(&local->sub_if_lock); | |
4100 | list_for_each_entry(sdata, &local->sub_if_list, list) { | |
4101 | sdata->channel_use = (sdata->channel_use_raw / | |
4102 | local->stat_time) / CHAN_UTIL_PER_10MS; | |
4103 | sdata->channel_use_raw = 0; | |
4104 | } | |
4105 | read_unlock(&local->sub_if_lock); | |
4106 | ||
4107 | /* hardware interface */ | |
4108 | local->channel_use = (local->channel_use_raw / | |
4109 | local->stat_time) / CHAN_UTIL_PER_10MS; | |
4110 | local->channel_use_raw = 0; | |
4111 | ||
4112 | local->stat_timer.expires = jiffies + HZ * local->stat_time / 100; | |
4113 | add_timer(&local->stat_timer); | |
4114 | } | |
4115 | ||
4116 | ||
4117 | /* This is a version of the rx handler that can be called from hard irq | |
4118 | * context. Post the skb on the queue and schedule the tasklet */ | |
4119 | void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb, | |
4120 | struct ieee80211_rx_status *status) | |
4121 | { | |
4122 | struct ieee80211_local *local = hw_to_local(hw); | |
4123 | ||
4124 | BUILD_BUG_ON(sizeof(struct ieee80211_rx_status) > sizeof(skb->cb)); | |
4125 | ||
4126 | skb->dev = local->mdev; | |
4127 | /* copy status into skb->cb for use by tasklet */ | |
4128 | memcpy(skb->cb, status, sizeof(*status)); | |
4129 | skb->pkt_type = IEEE80211_RX_MSG; | |
4130 | skb_queue_tail(&local->skb_queue, skb); | |
4131 | tasklet_schedule(&local->tasklet); | |
4132 | } | |
4133 | EXPORT_SYMBOL(ieee80211_rx_irqsafe); | |
4134 | ||
4135 | void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, | |
4136 | struct sk_buff *skb, | |
4137 | struct ieee80211_tx_status *status) | |
4138 | { | |
4139 | struct ieee80211_local *local = hw_to_local(hw); | |
4140 | struct ieee80211_tx_status *saved; | |
4141 | int tmp; | |
4142 | ||
4143 | skb->dev = local->mdev; | |
4144 | saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC); | |
4145 | if (unlikely(!saved)) { | |
4146 | if (net_ratelimit()) | |
4147 | printk(KERN_WARNING "%s: Not enough memory, " | |
4148 | "dropping tx status", skb->dev->name); | |
4149 | /* should be dev_kfree_skb_irq, but due to this function being | |
4150 | * named _irqsafe instead of just _irq we can't be sure that | |
4151 | * people won't call it from non-irq contexts */ | |
4152 | dev_kfree_skb_any(skb); | |
4153 | return; | |
4154 | } | |
4155 | memcpy(saved, status, sizeof(struct ieee80211_tx_status)); | |
4156 | /* copy pointer to saved status into skb->cb for use by tasklet */ | |
4157 | memcpy(skb->cb, &saved, sizeof(saved)); | |
4158 | ||
4159 | skb->pkt_type = IEEE80211_TX_STATUS_MSG; | |
4160 | skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ? | |
4161 | &local->skb_queue : &local->skb_queue_unreliable, skb); | |
4162 | tmp = skb_queue_len(&local->skb_queue) + | |
4163 | skb_queue_len(&local->skb_queue_unreliable); | |
4164 | while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT && | |
4165 | (skb = skb_dequeue(&local->skb_queue_unreliable))) { | |
4166 | memcpy(&saved, skb->cb, sizeof(saved)); | |
4167 | kfree(saved); | |
4168 | dev_kfree_skb_irq(skb); | |
4169 | tmp--; | |
4170 | I802_DEBUG_INC(local->tx_status_drop); | |
4171 | } | |
4172 | tasklet_schedule(&local->tasklet); | |
4173 | } | |
4174 | EXPORT_SYMBOL(ieee80211_tx_status_irqsafe); | |
4175 | ||
4176 | static void ieee80211_tasklet_handler(unsigned long data) | |
4177 | { | |
4178 | struct ieee80211_local *local = (struct ieee80211_local *) data; | |
4179 | struct sk_buff *skb; | |
4180 | struct ieee80211_rx_status rx_status; | |
4181 | struct ieee80211_tx_status *tx_status; | |
4182 | ||
4183 | while ((skb = skb_dequeue(&local->skb_queue)) || | |
4184 | (skb = skb_dequeue(&local->skb_queue_unreliable))) { | |
4185 | switch (skb->pkt_type) { | |
4186 | case IEEE80211_RX_MSG: | |
4187 | /* status is in skb->cb */ | |
4188 | memcpy(&rx_status, skb->cb, sizeof(rx_status)); | |
4189 | /* Clear skb->type in order to not confuse kernel | |
4190 | * netstack. */ | |
4191 | skb->pkt_type = 0; | |
4192 | __ieee80211_rx(local_to_hw(local), skb, &rx_status); | |
4193 | break; | |
4194 | case IEEE80211_TX_STATUS_MSG: | |
4195 | /* get pointer to saved status out of skb->cb */ | |
4196 | memcpy(&tx_status, skb->cb, sizeof(tx_status)); | |
4197 | skb->pkt_type = 0; | |
4198 | ieee80211_tx_status(local_to_hw(local), | |
4199 | skb, tx_status); | |
4200 | kfree(tx_status); | |
4201 | break; | |
4202 | default: /* should never get here! */ | |
4203 | printk(KERN_ERR "%s: Unknown message type (%d)\n", | |
4204 | local->mdev->name, skb->pkt_type); | |
4205 | dev_kfree_skb(skb); | |
4206 | break; | |
4207 | } | |
4208 | } | |
4209 | } | |
4210 | ||
4211 | ||
4212 | /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to | |
4213 | * make a prepared TX frame (one that has been given to hw) to look like brand | |
4214 | * new IEEE 802.11 frame that is ready to go through TX processing again. | |
4215 | * Also, tx_packet_data in cb is restored from tx_control. */ | |
4216 | static void ieee80211_remove_tx_extra(struct ieee80211_local *local, | |
4217 | struct ieee80211_key *key, | |
4218 | struct sk_buff *skb, | |
4219 | struct ieee80211_tx_control *control) | |
4220 | { | |
4221 | int hdrlen, iv_len, mic_len; | |
4222 | struct ieee80211_tx_packet_data *pkt_data; | |
4223 | ||
4224 | pkt_data = (struct ieee80211_tx_packet_data *)skb->cb; | |
4225 | pkt_data->ifindex = control->ifindex; | |
4226 | pkt_data->mgmt_iface = (control->type == IEEE80211_IF_TYPE_MGMT); | |
4227 | pkt_data->req_tx_status = !!(control->flags & IEEE80211_TXCTL_REQ_TX_STATUS); | |
4228 | pkt_data->do_not_encrypt = !!(control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT); | |
4229 | pkt_data->requeue = !!(control->flags & IEEE80211_TXCTL_REQUEUE); | |
4230 | pkt_data->queue = control->queue; | |
4231 | ||
4232 | hdrlen = ieee80211_get_hdrlen_from_skb(skb); | |
4233 | ||
4234 | if (!key) | |
4235 | goto no_key; | |
4236 | ||
4237 | switch (key->alg) { | |
4238 | case ALG_WEP: | |
4239 | iv_len = WEP_IV_LEN; | |
4240 | mic_len = WEP_ICV_LEN; | |
4241 | break; | |
4242 | case ALG_TKIP: | |
4243 | iv_len = TKIP_IV_LEN; | |
4244 | mic_len = TKIP_ICV_LEN; | |
4245 | break; | |
4246 | case ALG_CCMP: | |
4247 | iv_len = CCMP_HDR_LEN; | |
4248 | mic_len = CCMP_MIC_LEN; | |
4249 | break; | |
4250 | default: | |
4251 | goto no_key; | |
4252 | } | |
4253 | ||
4254 | if (skb->len >= mic_len && key->force_sw_encrypt) | |
4255 | skb_trim(skb, skb->len - mic_len); | |
4256 | if (skb->len >= iv_len && skb->len > hdrlen) { | |
4257 | memmove(skb->data + iv_len, skb->data, hdrlen); | |
4258 | skb_pull(skb, iv_len); | |
4259 | } | |
4260 | ||
4261 | no_key: | |
4262 | { | |
4263 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
4264 | u16 fc = le16_to_cpu(hdr->frame_control); | |
4265 | if ((fc & 0x8C) == 0x88) /* QoS Control Field */ { | |
4266 | fc &= ~IEEE80211_STYPE_QOS_DATA; | |
4267 | hdr->frame_control = cpu_to_le16(fc); | |
4268 | memmove(skb->data + 2, skb->data, hdrlen - 2); | |
4269 | skb_pull(skb, 2); | |
4270 | } | |
4271 | } | |
4272 | } | |
4273 | ||
4274 | ||
4275 | void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb, | |
4276 | struct ieee80211_tx_status *status) | |
4277 | { | |
4278 | struct sk_buff *skb2; | |
4279 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
4280 | struct ieee80211_local *local = hw_to_local(hw); | |
4281 | u16 frag, type; | |
4282 | u32 msg_type; | |
4283 | ||
4284 | if (!status) { | |
4285 | printk(KERN_ERR | |
4286 | "%s: ieee80211_tx_status called with NULL status\n", | |
4287 | local->mdev->name); | |
4288 | dev_kfree_skb(skb); | |
4289 | return; | |
4290 | } | |
4291 | ||
4292 | if (status->excessive_retries) { | |
4293 | struct sta_info *sta; | |
4294 | sta = sta_info_get(local, hdr->addr1); | |
4295 | if (sta) { | |
4296 | if (sta->flags & WLAN_STA_PS) { | |
4297 | /* The STA is in power save mode, so assume | |
4298 | * that this TX packet failed because of that. | |
4299 | */ | |
4300 | status->excessive_retries = 0; | |
4301 | status->flags |= IEEE80211_TX_STATUS_TX_FILTERED; | |
4302 | } | |
4303 | sta_info_put(sta); | |
4304 | } | |
4305 | } | |
4306 | ||
4307 | if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) { | |
4308 | struct sta_info *sta; | |
4309 | sta = sta_info_get(local, hdr->addr1); | |
4310 | if (sta) { | |
4311 | sta->tx_filtered_count++; | |
4312 | ||
4313 | /* Clear the TX filter mask for this STA when sending | |
4314 | * the next packet. If the STA went to power save mode, | |
4315 | * this will happen when it is waking up for the next | |
4316 | * time. */ | |
4317 | sta->clear_dst_mask = 1; | |
4318 | ||
4319 | /* TODO: Is the WLAN_STA_PS flag always set here or is | |
4320 | * the race between RX and TX status causing some | |
4321 | * packets to be filtered out before 80211.o gets an | |
4322 | * update for PS status? This seems to be the case, so | |
4323 | * no changes are likely to be needed. */ | |
4324 | if (sta->flags & WLAN_STA_PS && | |
4325 | skb_queue_len(&sta->tx_filtered) < | |
4326 | STA_MAX_TX_BUFFER) { | |
4327 | ieee80211_remove_tx_extra(local, sta->key, | |
4328 | skb, | |
4329 | &status->control); | |
4330 | skb_queue_tail(&sta->tx_filtered, skb); | |
4331 | } else if (!(sta->flags & WLAN_STA_PS) && | |
4332 | !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) { | |
4333 | /* Software retry the packet once */ | |
4334 | status->control.flags |= IEEE80211_TXCTL_REQUEUE; | |
4335 | ieee80211_remove_tx_extra(local, sta->key, | |
4336 | skb, | |
4337 | &status->control); | |
4338 | dev_queue_xmit(skb); | |
4339 | } else { | |
4340 | if (net_ratelimit()) { | |
4341 | printk(KERN_DEBUG "%s: dropped TX " | |
4342 | "filtered frame queue_len=%d " | |
4343 | "PS=%d @%lu\n", | |
4344 | local->mdev->name, | |
4345 | skb_queue_len( | |
4346 | &sta->tx_filtered), | |
4347 | !!(sta->flags & WLAN_STA_PS), | |
4348 | jiffies); | |
4349 | } | |
4350 | dev_kfree_skb(skb); | |
4351 | } | |
4352 | sta_info_put(sta); | |
4353 | return; | |
4354 | } | |
4355 | } else { | |
4356 | /* FIXME: STUPID to call this with both local and local->mdev */ | |
4357 | rate_control_tx_status(local, local->mdev, skb, status); | |
4358 | } | |
4359 | ||
4360 | ieee80211_led_tx(local, 0); | |
4361 | ||
4362 | /* SNMP counters | |
4363 | * Fragments are passed to low-level drivers as separate skbs, so these | |
4364 | * are actually fragments, not frames. Update frame counters only for | |
4365 | * the first fragment of the frame. */ | |
4366 | ||
4367 | frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG; | |
4368 | type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE; | |
4369 | ||
4370 | if (status->flags & IEEE80211_TX_STATUS_ACK) { | |
4371 | if (frag == 0) { | |
4372 | local->dot11TransmittedFrameCount++; | |
4373 | if (is_multicast_ether_addr(hdr->addr1)) | |
4374 | local->dot11MulticastTransmittedFrameCount++; | |
4375 | if (status->retry_count > 0) | |
4376 | local->dot11RetryCount++; | |
4377 | if (status->retry_count > 1) | |
4378 | local->dot11MultipleRetryCount++; | |
4379 | } | |
4380 | ||
4381 | /* This counter shall be incremented for an acknowledged MPDU | |
4382 | * with an individual address in the address 1 field or an MPDU | |
4383 | * with a multicast address in the address 1 field of type Data | |
4384 | * or Management. */ | |
4385 | if (!is_multicast_ether_addr(hdr->addr1) || | |
4386 | type == IEEE80211_FTYPE_DATA || | |
4387 | type == IEEE80211_FTYPE_MGMT) | |
4388 | local->dot11TransmittedFragmentCount++; | |
4389 | } else { | |
4390 | if (frag == 0) | |
4391 | local->dot11FailedCount++; | |
4392 | } | |
4393 | ||
4394 | if (!(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS) | |
4395 | || unlikely(!local->apdev)) { | |
4396 | dev_kfree_skb(skb); | |
4397 | return; | |
4398 | } | |
4399 | ||
4400 | msg_type = (status->flags & IEEE80211_TX_STATUS_ACK) ? | |
4401 | ieee80211_msg_tx_callback_ack : ieee80211_msg_tx_callback_fail; | |
4402 | ||
4403 | /* skb was the original skb used for TX. Clone it and give the clone | |
4404 | * to netif_rx(). Free original skb. */ | |
4405 | skb2 = skb_copy(skb, GFP_ATOMIC); | |
4406 | if (!skb2) { | |
4407 | dev_kfree_skb(skb); | |
4408 | return; | |
4409 | } | |
4410 | dev_kfree_skb(skb); | |
4411 | skb = skb2; | |
4412 | ||
4413 | /* Send frame to hostapd */ | |
4414 | ieee80211_rx_mgmt(local, skb, NULL, msg_type); | |
4415 | } | |
4416 | EXPORT_SYMBOL(ieee80211_tx_status); | |
4417 | ||
4418 | /* TODO: implement register/unregister functions for adding TX/RX handlers | |
4419 | * into ordered list */ | |
4420 | ||
4421 | /* rx_pre handlers don't have dev and sdata fields available in | |
4422 | * ieee80211_txrx_data */ | |
4423 | static ieee80211_rx_handler ieee80211_rx_pre_handlers[] = | |
4424 | { | |
4425 | ieee80211_rx_h_parse_qos, | |
4426 | ieee80211_rx_h_load_stats, | |
4427 | NULL | |
4428 | }; | |
4429 | ||
4430 | static ieee80211_rx_handler ieee80211_rx_handlers[] = | |
4431 | { | |
4432 | ieee80211_rx_h_if_stats, | |
4433 | ieee80211_rx_h_monitor, | |
4434 | ieee80211_rx_h_passive_scan, | |
4435 | ieee80211_rx_h_check, | |
4436 | ieee80211_rx_h_sta_process, | |
4437 | ieee80211_rx_h_ccmp_decrypt, | |
4438 | ieee80211_rx_h_tkip_decrypt, | |
4439 | ieee80211_rx_h_wep_weak_iv_detection, | |
4440 | ieee80211_rx_h_wep_decrypt, | |
4441 | ieee80211_rx_h_defragment, | |
4442 | ieee80211_rx_h_ps_poll, | |
4443 | ieee80211_rx_h_michael_mic_verify, | |
4444 | /* this must be after decryption - so header is counted in MPDU mic | |
4445 | * must be before pae and data, so QOS_DATA format frames | |
4446 | * are not passed to user space by these functions | |
4447 | */ | |
4448 | ieee80211_rx_h_remove_qos_control, | |
4449 | ieee80211_rx_h_802_1x_pae, | |
4450 | ieee80211_rx_h_drop_unencrypted, | |
4451 | ieee80211_rx_h_data, | |
4452 | ieee80211_rx_h_mgmt, | |
4453 | NULL | |
4454 | }; | |
4455 | ||
4456 | static ieee80211_tx_handler ieee80211_tx_handlers[] = | |
4457 | { | |
4458 | ieee80211_tx_h_check_assoc, | |
4459 | ieee80211_tx_h_sequence, | |
4460 | ieee80211_tx_h_ps_buf, | |
4461 | ieee80211_tx_h_select_key, | |
4462 | ieee80211_tx_h_michael_mic_add, | |
4463 | ieee80211_tx_h_fragment, | |
4464 | ieee80211_tx_h_tkip_encrypt, | |
4465 | ieee80211_tx_h_ccmp_encrypt, | |
4466 | ieee80211_tx_h_wep_encrypt, | |
4467 | ieee80211_tx_h_rate_ctrl, | |
4468 | ieee80211_tx_h_misc, | |
4469 | ieee80211_tx_h_load_stats, | |
4470 | NULL | |
4471 | }; | |
4472 | ||
4473 | ||
4474 | int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr) | |
4475 | { | |
4476 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
4477 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
4478 | struct sta_info *sta; | |
4479 | ||
4480 | if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0) | |
4481 | return 0; | |
4482 | ||
4483 | /* Create STA entry for the new peer */ | |
4484 | sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL); | |
4485 | if (!sta) | |
4486 | return -ENOMEM; | |
4487 | sta_info_put(sta); | |
4488 | ||
4489 | /* Remove STA entry for the old peer */ | |
4490 | sta = sta_info_get(local, sdata->u.wds.remote_addr); | |
4491 | if (sta) { | |
4492 | sta_info_put(sta); | |
4493 | sta_info_free(sta, 0); | |
4494 | } else { | |
4495 | printk(KERN_DEBUG "%s: could not find STA entry for WDS link " | |
4496 | "peer " MAC_FMT "\n", | |
4497 | dev->name, MAC_ARG(sdata->u.wds.remote_addr)); | |
4498 | } | |
4499 | ||
4500 | /* Update WDS link data */ | |
4501 | memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN); | |
4502 | ||
4503 | return 0; | |
4504 | } | |
4505 | ||
4506 | /* Must not be called for mdev and apdev */ | |
4507 | void ieee80211_if_setup(struct net_device *dev) | |
4508 | { | |
4509 | ether_setup(dev); | |
4510 | dev->hard_start_xmit = ieee80211_subif_start_xmit; | |
4511 | dev->wireless_handlers = &ieee80211_iw_handler_def; | |
4512 | dev->set_multicast_list = ieee80211_set_multicast_list; | |
4513 | dev->change_mtu = ieee80211_change_mtu; | |
4514 | dev->get_stats = ieee80211_get_stats; | |
4515 | dev->open = ieee80211_open; | |
4516 | dev->stop = ieee80211_stop; | |
4517 | dev->uninit = ieee80211_if_reinit; | |
4518 | dev->destructor = ieee80211_if_free; | |
4519 | } | |
4520 | ||
4521 | void ieee80211_if_mgmt_setup(struct net_device *dev) | |
4522 | { | |
4523 | ether_setup(dev); | |
4524 | dev->hard_start_xmit = ieee80211_mgmt_start_xmit; | |
4525 | dev->change_mtu = ieee80211_change_mtu_apdev; | |
4526 | dev->get_stats = ieee80211_get_stats; | |
4527 | dev->open = ieee80211_mgmt_open; | |
4528 | dev->stop = ieee80211_mgmt_stop; | |
4529 | dev->type = ARPHRD_IEEE80211_PRISM; | |
4530 | dev->hard_header_parse = header_parse_80211; | |
4531 | dev->uninit = ieee80211_if_reinit; | |
4532 | dev->destructor = ieee80211_if_free; | |
4533 | } | |
4534 | ||
4535 | int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local, | |
4536 | const char *name) | |
4537 | { | |
4538 | struct rate_control_ref *ref, *old; | |
4539 | ||
4540 | ASSERT_RTNL(); | |
4541 | if (local->open_count || netif_running(local->mdev) || | |
4542 | (local->apdev && netif_running(local->apdev))) | |
4543 | return -EBUSY; | |
4544 | ||
4545 | ref = rate_control_alloc(name, local); | |
4546 | if (!ref) { | |
4547 | printk(KERN_WARNING "%s: Failed to select rate control " | |
4548 | "algorithm\n", local->mdev->name); | |
4549 | return -ENOENT; | |
4550 | } | |
4551 | ||
4552 | old = local->rate_ctrl; | |
4553 | local->rate_ctrl = ref; | |
4554 | if (old) { | |
4555 | rate_control_put(old); | |
4556 | sta_info_flush(local, NULL); | |
4557 | } | |
4558 | ||
4559 | printk(KERN_DEBUG "%s: Selected rate control " | |
4560 | "algorithm '%s'\n", local->mdev->name, | |
4561 | ref->ops->name); | |
4562 | ||
4563 | ||
4564 | return 0; | |
4565 | } | |
4566 | ||
4567 | static void rate_control_deinitialize(struct ieee80211_local *local) | |
4568 | { | |
4569 | struct rate_control_ref *ref; | |
4570 | ||
4571 | ref = local->rate_ctrl; | |
4572 | local->rate_ctrl = NULL; | |
4573 | rate_control_put(ref); | |
4574 | } | |
4575 | ||
4576 | struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, | |
4577 | const struct ieee80211_ops *ops) | |
4578 | { | |
4579 | struct net_device *mdev; | |
4580 | struct ieee80211_local *local; | |
4581 | struct ieee80211_sub_if_data *sdata; | |
4582 | int priv_size; | |
4583 | struct wiphy *wiphy; | |
4584 | ||
4585 | /* Ensure 32-byte alignment of our private data and hw private data. | |
4586 | * We use the wiphy priv data for both our ieee80211_local and for | |
4587 | * the driver's private data | |
4588 | * | |
4589 | * In memory it'll be like this: | |
4590 | * | |
4591 | * +-------------------------+ | |
4592 | * | struct wiphy | | |
4593 | * +-------------------------+ | |
4594 | * | struct ieee80211_local | | |
4595 | * +-------------------------+ | |
4596 | * | driver's private data | | |
4597 | * +-------------------------+ | |
4598 | * | |
4599 | */ | |
4600 | priv_size = ((sizeof(struct ieee80211_local) + | |
4601 | NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) + | |
4602 | priv_data_len; | |
4603 | ||
4604 | wiphy = wiphy_new(&mac80211_config_ops, priv_size); | |
4605 | ||
4606 | if (!wiphy) | |
4607 | return NULL; | |
4608 | ||
4609 | wiphy->privid = mac80211_wiphy_privid; | |
4610 | ||
4611 | local = wiphy_priv(wiphy); | |
4612 | local->hw.wiphy = wiphy; | |
4613 | ||
4614 | local->hw.priv = (char *)local + | |
4615 | ((sizeof(struct ieee80211_local) + | |
4616 | NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST); | |
4617 | ||
4618 | local->ops = ops; | |
4619 | ||
4620 | /* for now, mdev needs sub_if_data :/ */ | |
4621 | mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data), | |
4622 | "wmaster%d", ether_setup); | |
4623 | if (!mdev) { | |
4624 | wiphy_free(wiphy); | |
4625 | return NULL; | |
4626 | } | |
4627 | ||
4628 | sdata = IEEE80211_DEV_TO_SUB_IF(mdev); | |
4629 | mdev->ieee80211_ptr = &sdata->wdev; | |
4630 | sdata->wdev.wiphy = wiphy; | |
4631 | ||
4632 | local->hw.queues = 1; /* default */ | |
4633 | ||
4634 | local->mdev = mdev; | |
4635 | local->rx_pre_handlers = ieee80211_rx_pre_handlers; | |
4636 | local->rx_handlers = ieee80211_rx_handlers; | |
4637 | local->tx_handlers = ieee80211_tx_handlers; | |
4638 | ||
4639 | local->bridge_packets = 1; | |
4640 | ||
4641 | local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD; | |
4642 | local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD; | |
4643 | local->short_retry_limit = 7; | |
4644 | local->long_retry_limit = 4; | |
4645 | local->hw.conf.radio_enabled = 1; | |
4646 | local->rate_ctrl_num_up = RATE_CONTROL_NUM_UP; | |
4647 | local->rate_ctrl_num_down = RATE_CONTROL_NUM_DOWN; | |
4648 | ||
4649 | local->enabled_modes = (unsigned int) -1; | |
4650 | ||
4651 | INIT_LIST_HEAD(&local->modes_list); | |
4652 | ||
4653 | rwlock_init(&local->sub_if_lock); | |
4654 | INIT_LIST_HEAD(&local->sub_if_list); | |
4655 | ||
4656 | INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work); | |
4657 | init_timer(&local->stat_timer); | |
4658 | local->stat_timer.function = ieee80211_stat_refresh; | |
4659 | local->stat_timer.data = (unsigned long) local; | |
4660 | ieee80211_rx_bss_list_init(mdev); | |
4661 | ||
4662 | sta_info_init(local); | |
4663 | ||
4664 | mdev->hard_start_xmit = ieee80211_master_start_xmit; | |
4665 | mdev->open = ieee80211_master_open; | |
4666 | mdev->stop = ieee80211_master_stop; | |
4667 | mdev->type = ARPHRD_IEEE80211; | |
4668 | mdev->hard_header_parse = header_parse_80211; | |
4669 | ||
4670 | sdata->type = IEEE80211_IF_TYPE_AP; | |
4671 | sdata->dev = mdev; | |
4672 | sdata->local = local; | |
4673 | sdata->u.ap.force_unicast_rateidx = -1; | |
4674 | sdata->u.ap.max_ratectrl_rateidx = -1; | |
4675 | ieee80211_if_sdata_init(sdata); | |
4676 | list_add_tail(&sdata->list, &local->sub_if_list); | |
4677 | ||
4678 | tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, | |
4679 | (unsigned long)local); | |
4680 | tasklet_disable(&local->tx_pending_tasklet); | |
4681 | ||
4682 | tasklet_init(&local->tasklet, | |
4683 | ieee80211_tasklet_handler, | |
4684 | (unsigned long) local); | |
4685 | tasklet_disable(&local->tasklet); | |
4686 | ||
4687 | skb_queue_head_init(&local->skb_queue); | |
4688 | skb_queue_head_init(&local->skb_queue_unreliable); | |
4689 | ||
4690 | return local_to_hw(local); | |
4691 | } | |
4692 | EXPORT_SYMBOL(ieee80211_alloc_hw); | |
4693 | ||
4694 | int ieee80211_register_hw(struct ieee80211_hw *hw) | |
4695 | { | |
4696 | struct ieee80211_local *local = hw_to_local(hw); | |
4697 | const char *name; | |
4698 | int result; | |
4699 | ||
4700 | result = wiphy_register(local->hw.wiphy); | |
4701 | if (result < 0) | |
4702 | return result; | |
4703 | ||
4704 | name = wiphy_dev(local->hw.wiphy)->driver->name; | |
4705 | local->hw.workqueue = create_singlethread_workqueue(name); | |
4706 | if (!local->hw.workqueue) { | |
4707 | result = -ENOMEM; | |
4708 | goto fail_workqueue; | |
4709 | } | |
4710 | ||
e9f207f0 JB |
4711 | debugfs_hw_add(local); |
4712 | ||
f0706e82 JB |
4713 | local->hw.conf.beacon_int = 1000; |
4714 | ||
4715 | local->wstats_flags |= local->hw.max_rssi ? | |
4716 | IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID; | |
4717 | local->wstats_flags |= local->hw.max_signal ? | |
4718 | IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID; | |
4719 | local->wstats_flags |= local->hw.max_noise ? | |
4720 | IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID; | |
4721 | if (local->hw.max_rssi < 0 || local->hw.max_noise < 0) | |
4722 | local->wstats_flags |= IW_QUAL_DBM; | |
4723 | ||
4724 | result = sta_info_start(local); | |
4725 | if (result < 0) | |
4726 | goto fail_sta_info; | |
4727 | ||
4728 | rtnl_lock(); | |
4729 | result = dev_alloc_name(local->mdev, local->mdev->name); | |
4730 | if (result < 0) | |
4731 | goto fail_dev; | |
4732 | ||
4733 | memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN); | |
4734 | SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy)); | |
4735 | ||
4736 | result = register_netdevice(local->mdev); | |
4737 | if (result < 0) | |
4738 | goto fail_dev; | |
4739 | ||
e9f207f0 JB |
4740 | ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev)); |
4741 | ||
f0706e82 JB |
4742 | result = ieee80211_init_rate_ctrl_alg(local, NULL); |
4743 | if (result < 0) { | |
4744 | printk(KERN_DEBUG "%s: Failed to initialize rate control " | |
4745 | "algorithm\n", local->mdev->name); | |
4746 | goto fail_rate; | |
4747 | } | |
4748 | ||
4749 | result = ieee80211_wep_init(local); | |
4750 | ||
4751 | if (result < 0) { | |
4752 | printk(KERN_DEBUG "%s: Failed to initialize wep\n", | |
4753 | local->mdev->name); | |
4754 | goto fail_wep; | |
4755 | } | |
4756 | ||
4757 | ieee80211_install_qdisc(local->mdev); | |
4758 | ||
4759 | /* add one default STA interface */ | |
4760 | result = ieee80211_if_add(local->mdev, "wlan%d", NULL, | |
4761 | IEEE80211_IF_TYPE_STA); | |
4762 | if (result) | |
4763 | printk(KERN_WARNING "%s: Failed to add default virtual iface\n", | |
4764 | local->mdev->name); | |
4765 | ||
4766 | local->reg_state = IEEE80211_DEV_REGISTERED; | |
4767 | rtnl_unlock(); | |
4768 | ||
4769 | ieee80211_led_init(local); | |
4770 | ||
4771 | return 0; | |
4772 | ||
4773 | fail_wep: | |
4774 | rate_control_deinitialize(local); | |
4775 | fail_rate: | |
e9f207f0 | 4776 | ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev)); |
f0706e82 JB |
4777 | unregister_netdevice(local->mdev); |
4778 | fail_dev: | |
4779 | rtnl_unlock(); | |
4780 | sta_info_stop(local); | |
4781 | fail_sta_info: | |
e9f207f0 | 4782 | debugfs_hw_del(local); |
f0706e82 JB |
4783 | destroy_workqueue(local->hw.workqueue); |
4784 | fail_workqueue: | |
4785 | wiphy_unregister(local->hw.wiphy); | |
4786 | return result; | |
4787 | } | |
4788 | EXPORT_SYMBOL(ieee80211_register_hw); | |
4789 | ||
4790 | int ieee80211_register_hwmode(struct ieee80211_hw *hw, | |
4791 | struct ieee80211_hw_mode *mode) | |
4792 | { | |
4793 | struct ieee80211_local *local = hw_to_local(hw); | |
4794 | struct ieee80211_rate *rate; | |
4795 | int i; | |
4796 | ||
4797 | INIT_LIST_HEAD(&mode->list); | |
4798 | list_add_tail(&mode->list, &local->modes_list); | |
4799 | ||
4800 | local->hw_modes |= (1 << mode->mode); | |
4801 | for (i = 0; i < mode->num_rates; i++) { | |
4802 | rate = &(mode->rates[i]); | |
4803 | rate->rate_inv = CHAN_UTIL_RATE_LCM / rate->rate; | |
4804 | } | |
4805 | ieee80211_prepare_rates(local, mode); | |
4806 | ||
4807 | if (!local->oper_hw_mode) { | |
4808 | /* Default to this mode */ | |
4809 | local->hw.conf.phymode = mode->mode; | |
4810 | local->oper_hw_mode = local->scan_hw_mode = mode; | |
4811 | local->oper_channel = local->scan_channel = &mode->channels[0]; | |
4812 | local->hw.conf.mode = local->oper_hw_mode; | |
4813 | local->hw.conf.chan = local->oper_channel; | |
4814 | } | |
4815 | ||
4816 | if (!(hw->flags & IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED)) | |
4817 | ieee80211_init_client(local->mdev); | |
4818 | ||
4819 | return 0; | |
4820 | } | |
4821 | EXPORT_SYMBOL(ieee80211_register_hwmode); | |
4822 | ||
4823 | void ieee80211_unregister_hw(struct ieee80211_hw *hw) | |
4824 | { | |
4825 | struct ieee80211_local *local = hw_to_local(hw); | |
4826 | struct ieee80211_sub_if_data *sdata, *tmp; | |
4827 | struct list_head tmp_list; | |
4828 | int i; | |
4829 | ||
4830 | tasklet_kill(&local->tx_pending_tasklet); | |
4831 | tasklet_kill(&local->tasklet); | |
4832 | ||
4833 | rtnl_lock(); | |
4834 | ||
4835 | BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED); | |
4836 | ||
4837 | local->reg_state = IEEE80211_DEV_UNREGISTERED; | |
4838 | if (local->apdev) | |
4839 | ieee80211_if_del_mgmt(local); | |
4840 | ||
4841 | write_lock_bh(&local->sub_if_lock); | |
4842 | list_replace_init(&local->sub_if_list, &tmp_list); | |
4843 | write_unlock_bh(&local->sub_if_lock); | |
4844 | ||
4845 | list_for_each_entry_safe(sdata, tmp, &tmp_list, list) | |
4846 | __ieee80211_if_del(local, sdata); | |
4847 | ||
4848 | rtnl_unlock(); | |
4849 | ||
4850 | if (local->stat_time) | |
4851 | del_timer_sync(&local->stat_timer); | |
4852 | ||
4853 | ieee80211_rx_bss_list_deinit(local->mdev); | |
4854 | ieee80211_clear_tx_pending(local); | |
4855 | sta_info_stop(local); | |
4856 | rate_control_deinitialize(local); | |
e9f207f0 | 4857 | debugfs_hw_del(local); |
f0706e82 JB |
4858 | |
4859 | for (i = 0; i < NUM_IEEE80211_MODES; i++) { | |
4860 | kfree(local->supp_rates[i]); | |
4861 | kfree(local->basic_rates[i]); | |
4862 | } | |
4863 | ||
4864 | if (skb_queue_len(&local->skb_queue) | |
4865 | || skb_queue_len(&local->skb_queue_unreliable)) | |
4866 | printk(KERN_WARNING "%s: skb_queue not empty\n", | |
4867 | local->mdev->name); | |
4868 | skb_queue_purge(&local->skb_queue); | |
4869 | skb_queue_purge(&local->skb_queue_unreliable); | |
4870 | ||
4871 | destroy_workqueue(local->hw.workqueue); | |
4872 | wiphy_unregister(local->hw.wiphy); | |
4873 | ieee80211_wep_free(local); | |
4874 | ieee80211_led_exit(local); | |
4875 | } | |
4876 | EXPORT_SYMBOL(ieee80211_unregister_hw); | |
4877 | ||
4878 | void ieee80211_free_hw(struct ieee80211_hw *hw) | |
4879 | { | |
4880 | struct ieee80211_local *local = hw_to_local(hw); | |
4881 | ||
4882 | ieee80211_if_free(local->mdev); | |
4883 | wiphy_free(local->hw.wiphy); | |
4884 | } | |
4885 | EXPORT_SYMBOL(ieee80211_free_hw); | |
4886 | ||
4887 | void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue) | |
4888 | { | |
4889 | struct ieee80211_local *local = hw_to_local(hw); | |
4890 | ||
4891 | if (test_and_clear_bit(IEEE80211_LINK_STATE_XOFF, | |
4892 | &local->state[queue])) { | |
4893 | if (test_bit(IEEE80211_LINK_STATE_PENDING, | |
4894 | &local->state[queue])) | |
4895 | tasklet_schedule(&local->tx_pending_tasklet); | |
4896 | else | |
4897 | if (!ieee80211_qdisc_installed(local->mdev)) { | |
4898 | if (queue == 0) | |
4899 | netif_wake_queue(local->mdev); | |
4900 | } else | |
4901 | __netif_schedule(local->mdev); | |
4902 | } | |
4903 | } | |
4904 | EXPORT_SYMBOL(ieee80211_wake_queue); | |
4905 | ||
4906 | void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue) | |
4907 | { | |
4908 | struct ieee80211_local *local = hw_to_local(hw); | |
4909 | ||
4910 | if (!ieee80211_qdisc_installed(local->mdev) && queue == 0) | |
4911 | netif_stop_queue(local->mdev); | |
4912 | set_bit(IEEE80211_LINK_STATE_XOFF, &local->state[queue]); | |
4913 | } | |
4914 | EXPORT_SYMBOL(ieee80211_stop_queue); | |
4915 | ||
4916 | void ieee80211_start_queues(struct ieee80211_hw *hw) | |
4917 | { | |
4918 | struct ieee80211_local *local = hw_to_local(hw); | |
4919 | int i; | |
4920 | ||
4921 | for (i = 0; i < local->hw.queues; i++) | |
4922 | clear_bit(IEEE80211_LINK_STATE_XOFF, &local->state[i]); | |
4923 | if (!ieee80211_qdisc_installed(local->mdev)) | |
4924 | netif_start_queue(local->mdev); | |
4925 | } | |
4926 | EXPORT_SYMBOL(ieee80211_start_queues); | |
4927 | ||
4928 | void ieee80211_stop_queues(struct ieee80211_hw *hw) | |
4929 | { | |
4930 | int i; | |
4931 | ||
4932 | for (i = 0; i < hw->queues; i++) | |
4933 | ieee80211_stop_queue(hw, i); | |
4934 | } | |
4935 | EXPORT_SYMBOL(ieee80211_stop_queues); | |
4936 | ||
4937 | void ieee80211_wake_queues(struct ieee80211_hw *hw) | |
4938 | { | |
4939 | int i; | |
4940 | ||
4941 | for (i = 0; i < hw->queues; i++) | |
4942 | ieee80211_wake_queue(hw, i); | |
4943 | } | |
4944 | EXPORT_SYMBOL(ieee80211_wake_queues); | |
4945 | ||
4946 | struct net_device_stats *ieee80211_dev_stats(struct net_device *dev) | |
4947 | { | |
4948 | struct ieee80211_sub_if_data *sdata; | |
4949 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
4950 | return &sdata->stats; | |
4951 | } | |
4952 | ||
4953 | static int __init ieee80211_init(void) | |
4954 | { | |
4955 | struct sk_buff *skb; | |
4956 | int ret; | |
4957 | ||
4958 | BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb)); | |
4959 | ||
4960 | ret = ieee80211_wme_register(); | |
4961 | if (ret) { | |
4962 | printk(KERN_DEBUG "ieee80211_init: failed to " | |
4963 | "initialize WME (err=%d)\n", ret); | |
4964 | return ret; | |
4965 | } | |
4966 | ||
e9f207f0 JB |
4967 | ieee80211_debugfs_netdev_init(); |
4968 | ||
f0706e82 JB |
4969 | return 0; |
4970 | } | |
4971 | ||
4972 | ||
4973 | static void __exit ieee80211_exit(void) | |
4974 | { | |
4975 | ieee80211_wme_unregister(); | |
e9f207f0 | 4976 | ieee80211_debugfs_netdev_exit(); |
f0706e82 JB |
4977 | } |
4978 | ||
4979 | ||
4980 | module_init(ieee80211_init); | |
4981 | module_exit(ieee80211_exit); | |
4982 | ||
4983 | MODULE_DESCRIPTION("IEEE 802.11 subsystem"); | |
4984 | MODULE_LICENSE("GPL"); |