Commit | Line | Data |
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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> | |
e4c967c6 | 27 | #include <asm/unaligned.h> |
f0706e82 JB |
28 | |
29 | #include "ieee80211_common.h" | |
30 | #include "ieee80211_i.h" | |
31 | #include "ieee80211_rate.h" | |
32 | #include "wep.h" | |
33 | #include "wpa.h" | |
34 | #include "tkip.h" | |
35 | #include "wme.h" | |
36 | #include "aes_ccm.h" | |
37 | #include "ieee80211_led.h" | |
38 | #include "ieee80211_cfg.h" | |
e9f207f0 JB |
39 | #include "debugfs.h" |
40 | #include "debugfs_netdev.h" | |
41 | #include "debugfs_key.h" | |
f0706e82 JB |
42 | |
43 | /* privid for wiphys to determine whether they belong to us or not */ | |
44 | void *mac80211_wiphy_privid = &mac80211_wiphy_privid; | |
45 | ||
46 | /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */ | |
47 | /* Ethernet-II snap header (RFC1042 for most EtherTypes) */ | |
48 | static const unsigned char rfc1042_header[] = | |
49 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 }; | |
50 | ||
51 | /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */ | |
52 | static const unsigned char bridge_tunnel_header[] = | |
53 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 }; | |
54 | ||
55 | /* No encapsulation header if EtherType < 0x600 (=length) */ | |
56 | static const unsigned char eapol_header[] = | |
57 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00, 0x88, 0x8e }; | |
58 | ||
59 | ||
b306f453 JB |
60 | /* |
61 | * For seeing transmitted packets on monitor interfaces | |
62 | * we have a radiotap header too. | |
63 | */ | |
64 | struct ieee80211_tx_status_rtap_hdr { | |
65 | struct ieee80211_radiotap_header hdr; | |
66 | __le16 tx_flags; | |
67 | u8 data_retries; | |
68 | } __attribute__ ((packed)); | |
69 | ||
70 | ||
f0706e82 JB |
71 | static inline void ieee80211_include_sequence(struct ieee80211_sub_if_data *sdata, |
72 | struct ieee80211_hdr *hdr) | |
73 | { | |
74 | /* Set the sequence number for this frame. */ | |
75 | hdr->seq_ctrl = cpu_to_le16(sdata->sequence); | |
76 | ||
77 | /* Increase the sequence number. */ | |
78 | sdata->sequence = (sdata->sequence + 0x10) & IEEE80211_SCTL_SEQ; | |
79 | } | |
80 | ||
81 | struct ieee80211_key_conf * | |
82 | ieee80211_key_data2conf(struct ieee80211_local *local, | |
83 | const struct ieee80211_key *data) | |
84 | { | |
85 | struct ieee80211_key_conf *conf; | |
86 | ||
87 | conf = kmalloc(sizeof(*conf) + data->keylen, GFP_ATOMIC); | |
88 | if (!conf) | |
89 | return NULL; | |
90 | ||
91 | conf->hw_key_idx = data->hw_key_idx; | |
92 | conf->alg = data->alg; | |
93 | conf->keylen = data->keylen; | |
94 | conf->flags = 0; | |
95 | if (data->force_sw_encrypt) | |
96 | conf->flags |= IEEE80211_KEY_FORCE_SW_ENCRYPT; | |
97 | conf->keyidx = data->keyidx; | |
98 | if (data->default_tx_key) | |
99 | conf->flags |= IEEE80211_KEY_DEFAULT_TX_KEY; | |
100 | if (local->default_wep_only) | |
101 | conf->flags |= IEEE80211_KEY_DEFAULT_WEP_ONLY; | |
102 | memcpy(conf->key, data->key, data->keylen); | |
103 | ||
104 | return conf; | |
105 | } | |
106 | ||
107 | struct ieee80211_key *ieee80211_key_alloc(struct ieee80211_sub_if_data *sdata, | |
108 | int idx, size_t key_len, gfp_t flags) | |
109 | { | |
110 | struct ieee80211_key *key; | |
111 | ||
112 | key = kzalloc(sizeof(struct ieee80211_key) + key_len, flags); | |
113 | if (!key) | |
114 | return NULL; | |
115 | kref_init(&key->kref); | |
116 | return key; | |
117 | } | |
118 | ||
119 | static void ieee80211_key_release(struct kref *kref) | |
120 | { | |
121 | struct ieee80211_key *key; | |
122 | ||
123 | key = container_of(kref, struct ieee80211_key, kref); | |
124 | if (key->alg == ALG_CCMP) | |
125 | ieee80211_aes_key_free(key->u.ccmp.tfm); | |
e9f207f0 | 126 | ieee80211_debugfs_key_remove(key); |
f0706e82 JB |
127 | kfree(key); |
128 | } | |
129 | ||
130 | void ieee80211_key_free(struct ieee80211_key *key) | |
131 | { | |
132 | if (key) | |
133 | kref_put(&key->kref, ieee80211_key_release); | |
134 | } | |
135 | ||
136 | static int rate_list_match(const int *rate_list, int rate) | |
137 | { | |
138 | int i; | |
139 | ||
140 | if (!rate_list) | |
141 | return 0; | |
142 | ||
143 | for (i = 0; rate_list[i] >= 0; i++) | |
144 | if (rate_list[i] == rate) | |
145 | return 1; | |
146 | ||
147 | return 0; | |
148 | } | |
149 | ||
150 | ||
151 | void ieee80211_prepare_rates(struct ieee80211_local *local, | |
152 | struct ieee80211_hw_mode *mode) | |
153 | { | |
154 | int i; | |
155 | ||
156 | for (i = 0; i < mode->num_rates; i++) { | |
157 | struct ieee80211_rate *rate = &mode->rates[i]; | |
158 | ||
159 | rate->flags &= ~(IEEE80211_RATE_SUPPORTED | | |
160 | IEEE80211_RATE_BASIC); | |
161 | ||
162 | if (local->supp_rates[mode->mode]) { | |
163 | if (!rate_list_match(local->supp_rates[mode->mode], | |
164 | rate->rate)) | |
165 | continue; | |
166 | } | |
167 | ||
168 | rate->flags |= IEEE80211_RATE_SUPPORTED; | |
169 | ||
170 | /* Use configured basic rate set if it is available. If not, | |
171 | * use defaults that are sane for most cases. */ | |
172 | if (local->basic_rates[mode->mode]) { | |
173 | if (rate_list_match(local->basic_rates[mode->mode], | |
174 | rate->rate)) | |
175 | rate->flags |= IEEE80211_RATE_BASIC; | |
176 | } else switch (mode->mode) { | |
177 | case MODE_IEEE80211A: | |
178 | if (rate->rate == 60 || rate->rate == 120 || | |
179 | rate->rate == 240) | |
180 | rate->flags |= IEEE80211_RATE_BASIC; | |
181 | break; | |
182 | case MODE_IEEE80211B: | |
183 | if (rate->rate == 10 || rate->rate == 20) | |
184 | rate->flags |= IEEE80211_RATE_BASIC; | |
185 | break; | |
186 | case MODE_ATHEROS_TURBO: | |
187 | if (rate->rate == 120 || rate->rate == 240 || | |
188 | rate->rate == 480) | |
189 | rate->flags |= IEEE80211_RATE_BASIC; | |
190 | break; | |
191 | case MODE_IEEE80211G: | |
192 | if (rate->rate == 10 || rate->rate == 20 || | |
193 | rate->rate == 55 || rate->rate == 110) | |
194 | rate->flags |= IEEE80211_RATE_BASIC; | |
195 | break; | |
196 | } | |
197 | ||
198 | /* Set ERP and MANDATORY flags based on phymode */ | |
199 | switch (mode->mode) { | |
200 | case MODE_IEEE80211A: | |
201 | if (rate->rate == 60 || rate->rate == 120 || | |
202 | rate->rate == 240) | |
203 | rate->flags |= IEEE80211_RATE_MANDATORY; | |
204 | break; | |
205 | case MODE_IEEE80211B: | |
206 | if (rate->rate == 10) | |
207 | rate->flags |= IEEE80211_RATE_MANDATORY; | |
208 | break; | |
209 | case MODE_ATHEROS_TURBO: | |
210 | break; | |
211 | case MODE_IEEE80211G: | |
212 | if (rate->rate == 10 || rate->rate == 20 || | |
213 | rate->rate == 55 || rate->rate == 110 || | |
214 | rate->rate == 60 || rate->rate == 120 || | |
215 | rate->rate == 240) | |
216 | rate->flags |= IEEE80211_RATE_MANDATORY; | |
217 | break; | |
218 | } | |
219 | if (ieee80211_is_erp_rate(mode->mode, rate->rate)) | |
220 | rate->flags |= IEEE80211_RATE_ERP; | |
221 | } | |
222 | } | |
223 | ||
224 | ||
225 | static void ieee80211_key_threshold_notify(struct net_device *dev, | |
226 | struct ieee80211_key *key, | |
227 | struct sta_info *sta) | |
228 | { | |
229 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
230 | struct sk_buff *skb; | |
231 | struct ieee80211_msg_key_notification *msg; | |
232 | ||
233 | /* if no one will get it anyway, don't even allocate it. | |
234 | * unlikely because this is only relevant for APs | |
235 | * where the device must be open... */ | |
236 | if (unlikely(!local->apdev)) | |
237 | return; | |
238 | ||
239 | skb = dev_alloc_skb(sizeof(struct ieee80211_frame_info) + | |
240 | sizeof(struct ieee80211_msg_key_notification)); | |
241 | if (!skb) | |
242 | return; | |
243 | ||
244 | skb_reserve(skb, sizeof(struct ieee80211_frame_info)); | |
245 | msg = (struct ieee80211_msg_key_notification *) | |
246 | skb_put(skb, sizeof(struct ieee80211_msg_key_notification)); | |
247 | msg->tx_rx_count = key->tx_rx_count; | |
248 | memcpy(msg->ifname, dev->name, IFNAMSIZ); | |
249 | if (sta) | |
250 | memcpy(msg->addr, sta->addr, ETH_ALEN); | |
251 | else | |
252 | memset(msg->addr, 0xff, ETH_ALEN); | |
253 | ||
254 | key->tx_rx_count = 0; | |
255 | ||
256 | ieee80211_rx_mgmt(local, skb, NULL, | |
257 | ieee80211_msg_key_threshold_notification); | |
258 | } | |
259 | ||
260 | ||
261 | static u8 * ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len) | |
262 | { | |
263 | u16 fc; | |
264 | ||
265 | if (len < 24) | |
266 | return NULL; | |
267 | ||
268 | fc = le16_to_cpu(hdr->frame_control); | |
269 | ||
270 | switch (fc & IEEE80211_FCTL_FTYPE) { | |
271 | case IEEE80211_FTYPE_DATA: | |
272 | switch (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) { | |
273 | case IEEE80211_FCTL_TODS: | |
274 | return hdr->addr1; | |
275 | case (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS): | |
276 | return NULL; | |
277 | case IEEE80211_FCTL_FROMDS: | |
278 | return hdr->addr2; | |
279 | case 0: | |
280 | return hdr->addr3; | |
281 | } | |
282 | break; | |
283 | case IEEE80211_FTYPE_MGMT: | |
284 | return hdr->addr3; | |
285 | case IEEE80211_FTYPE_CTL: | |
286 | if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PSPOLL) | |
287 | return hdr->addr1; | |
288 | else | |
289 | return NULL; | |
290 | } | |
291 | ||
292 | return NULL; | |
293 | } | |
294 | ||
295 | int ieee80211_get_hdrlen(u16 fc) | |
296 | { | |
297 | int hdrlen = 24; | |
298 | ||
299 | switch (fc & IEEE80211_FCTL_FTYPE) { | |
300 | case IEEE80211_FTYPE_DATA: | |
301 | if ((fc & IEEE80211_FCTL_FROMDS) && (fc & IEEE80211_FCTL_TODS)) | |
302 | hdrlen = 30; /* Addr4 */ | |
303 | /* | |
304 | * The QoS Control field is two bytes and its presence is | |
305 | * indicated by the IEEE80211_STYPE_QOS_DATA bit. Add 2 to | |
306 | * hdrlen if that bit is set. | |
307 | * This works by masking out the bit and shifting it to | |
308 | * bit position 1 so the result has the value 0 or 2. | |
309 | */ | |
310 | hdrlen += (fc & IEEE80211_STYPE_QOS_DATA) | |
311 | >> (ilog2(IEEE80211_STYPE_QOS_DATA)-1); | |
312 | break; | |
313 | case IEEE80211_FTYPE_CTL: | |
314 | /* | |
315 | * ACK and CTS are 10 bytes, all others 16. To see how | |
316 | * to get this condition consider | |
317 | * subtype mask: 0b0000000011110000 (0x00F0) | |
318 | * ACK subtype: 0b0000000011010000 (0x00D0) | |
319 | * CTS subtype: 0b0000000011000000 (0x00C0) | |
320 | * bits that matter: ^^^ (0x00E0) | |
321 | * value of those: 0b0000000011000000 (0x00C0) | |
322 | */ | |
323 | if ((fc & 0xE0) == 0xC0) | |
324 | hdrlen = 10; | |
325 | else | |
326 | hdrlen = 16; | |
327 | break; | |
328 | } | |
329 | ||
330 | return hdrlen; | |
331 | } | |
332 | EXPORT_SYMBOL(ieee80211_get_hdrlen); | |
333 | ||
334 | int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb) | |
335 | { | |
336 | const struct ieee80211_hdr *hdr = (const struct ieee80211_hdr *) skb->data; | |
337 | int hdrlen; | |
338 | ||
339 | if (unlikely(skb->len < 10)) | |
340 | return 0; | |
341 | hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_control)); | |
342 | if (unlikely(hdrlen > skb->len)) | |
343 | return 0; | |
344 | return hdrlen; | |
345 | } | |
346 | EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb); | |
347 | ||
348 | static int ieee80211_get_radiotap_len(struct sk_buff *skb) | |
349 | { | |
350 | struct ieee80211_radiotap_header *hdr = | |
351 | (struct ieee80211_radiotap_header *) skb->data; | |
352 | ||
353 | return le16_to_cpu(hdr->it_len); | |
354 | } | |
355 | ||
356 | #ifdef CONFIG_MAC80211_LOWTX_FRAME_DUMP | |
357 | static void ieee80211_dump_frame(const char *ifname, const char *title, | |
358 | const struct sk_buff *skb) | |
359 | { | |
360 | const struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
361 | u16 fc; | |
362 | int hdrlen; | |
363 | ||
364 | printk(KERN_DEBUG "%s: %s (len=%d)", ifname, title, skb->len); | |
365 | if (skb->len < 4) { | |
366 | printk("\n"); | |
367 | return; | |
368 | } | |
369 | ||
370 | fc = le16_to_cpu(hdr->frame_control); | |
371 | hdrlen = ieee80211_get_hdrlen(fc); | |
372 | if (hdrlen > skb->len) | |
373 | hdrlen = skb->len; | |
374 | if (hdrlen >= 4) | |
375 | printk(" FC=0x%04x DUR=0x%04x", | |
376 | fc, le16_to_cpu(hdr->duration_id)); | |
377 | if (hdrlen >= 10) | |
378 | printk(" A1=" MAC_FMT, MAC_ARG(hdr->addr1)); | |
379 | if (hdrlen >= 16) | |
380 | printk(" A2=" MAC_FMT, MAC_ARG(hdr->addr2)); | |
381 | if (hdrlen >= 24) | |
382 | printk(" A3=" MAC_FMT, MAC_ARG(hdr->addr3)); | |
383 | if (hdrlen >= 30) | |
384 | printk(" A4=" MAC_FMT, MAC_ARG(hdr->addr4)); | |
385 | printk("\n"); | |
386 | } | |
387 | #else /* CONFIG_MAC80211_LOWTX_FRAME_DUMP */ | |
388 | static inline void ieee80211_dump_frame(const char *ifname, const char *title, | |
389 | struct sk_buff *skb) | |
390 | { | |
391 | } | |
392 | #endif /* CONFIG_MAC80211_LOWTX_FRAME_DUMP */ | |
393 | ||
394 | ||
395 | static int ieee80211_is_eapol(const struct sk_buff *skb) | |
396 | { | |
397 | const struct ieee80211_hdr *hdr; | |
398 | u16 fc; | |
399 | int hdrlen; | |
400 | ||
401 | if (unlikely(skb->len < 10)) | |
402 | return 0; | |
403 | ||
404 | hdr = (const struct ieee80211_hdr *) skb->data; | |
405 | fc = le16_to_cpu(hdr->frame_control); | |
406 | ||
407 | if (unlikely(!WLAN_FC_DATA_PRESENT(fc))) | |
408 | return 0; | |
409 | ||
410 | hdrlen = ieee80211_get_hdrlen(fc); | |
411 | ||
412 | if (unlikely(skb->len >= hdrlen + sizeof(eapol_header) && | |
413 | memcmp(skb->data + hdrlen, eapol_header, | |
414 | sizeof(eapol_header)) == 0)) | |
415 | return 1; | |
416 | ||
417 | return 0; | |
418 | } | |
419 | ||
420 | ||
421 | static ieee80211_txrx_result | |
422 | ieee80211_tx_h_rate_ctrl(struct ieee80211_txrx_data *tx) | |
423 | { | |
424 | struct rate_control_extra extra; | |
425 | ||
426 | memset(&extra, 0, sizeof(extra)); | |
427 | extra.mode = tx->u.tx.mode; | |
428 | extra.mgmt_data = tx->sdata && | |
429 | tx->sdata->type == IEEE80211_IF_TYPE_MGMT; | |
430 | extra.ethertype = tx->ethertype; | |
431 | ||
432 | tx->u.tx.rate = rate_control_get_rate(tx->local, tx->dev, tx->skb, | |
433 | &extra); | |
434 | if (unlikely(extra.probe != NULL)) { | |
435 | tx->u.tx.control->flags |= IEEE80211_TXCTL_RATE_CTRL_PROBE; | |
436 | tx->u.tx.probe_last_frag = 1; | |
437 | tx->u.tx.control->alt_retry_rate = tx->u.tx.rate->val; | |
438 | tx->u.tx.rate = extra.probe; | |
439 | } else { | |
440 | tx->u.tx.control->alt_retry_rate = -1; | |
441 | } | |
442 | if (!tx->u.tx.rate) | |
443 | return TXRX_DROP; | |
444 | if (tx->u.tx.mode->mode == MODE_IEEE80211G && | |
63fc33ce | 445 | tx->sdata->use_protection && tx->fragmented && |
f0706e82 JB |
446 | extra.nonerp) { |
447 | tx->u.tx.last_frag_rate = tx->u.tx.rate; | |
448 | tx->u.tx.probe_last_frag = extra.probe ? 1 : 0; | |
449 | ||
450 | tx->u.tx.rate = extra.nonerp; | |
451 | tx->u.tx.control->rate = extra.nonerp; | |
452 | tx->u.tx.control->flags &= ~IEEE80211_TXCTL_RATE_CTRL_PROBE; | |
453 | } else { | |
454 | tx->u.tx.last_frag_rate = tx->u.tx.rate; | |
455 | tx->u.tx.control->rate = tx->u.tx.rate; | |
456 | } | |
457 | tx->u.tx.control->tx_rate = tx->u.tx.rate->val; | |
458 | if ((tx->u.tx.rate->flags & IEEE80211_RATE_PREAMBLE2) && | |
459 | tx->local->short_preamble && | |
460 | (!tx->sta || (tx->sta->flags & WLAN_STA_SHORT_PREAMBLE))) { | |
461 | tx->u.tx.short_preamble = 1; | |
462 | tx->u.tx.control->tx_rate = tx->u.tx.rate->val2; | |
463 | } | |
464 | ||
465 | return TXRX_CONTINUE; | |
466 | } | |
467 | ||
468 | ||
469 | static ieee80211_txrx_result | |
470 | ieee80211_tx_h_select_key(struct ieee80211_txrx_data *tx) | |
471 | { | |
472 | if (tx->sta) | |
473 | tx->u.tx.control->key_idx = tx->sta->key_idx_compression; | |
474 | else | |
475 | tx->u.tx.control->key_idx = HW_KEY_IDX_INVALID; | |
476 | ||
477 | if (unlikely(tx->u.tx.control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT)) | |
478 | tx->key = NULL; | |
479 | else if (tx->sta && tx->sta->key) | |
480 | tx->key = tx->sta->key; | |
481 | else if (tx->sdata->default_key) | |
482 | tx->key = tx->sdata->default_key; | |
483 | else if (tx->sdata->drop_unencrypted && | |
484 | !(tx->sdata->eapol && ieee80211_is_eapol(tx->skb))) { | |
485 | I802_DEBUG_INC(tx->local->tx_handlers_drop_unencrypted); | |
486 | return TXRX_DROP; | |
487 | } else | |
488 | tx->key = NULL; | |
489 | ||
490 | if (tx->key) { | |
491 | tx->key->tx_rx_count++; | |
492 | if (unlikely(tx->local->key_tx_rx_threshold && | |
493 | tx->key->tx_rx_count > | |
494 | tx->local->key_tx_rx_threshold)) { | |
495 | ieee80211_key_threshold_notify(tx->dev, tx->key, | |
496 | tx->sta); | |
497 | } | |
498 | } | |
499 | ||
500 | return TXRX_CONTINUE; | |
501 | } | |
502 | ||
503 | ||
504 | static ieee80211_txrx_result | |
505 | ieee80211_tx_h_fragment(struct ieee80211_txrx_data *tx) | |
506 | { | |
507 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data; | |
508 | size_t hdrlen, per_fragm, num_fragm, payload_len, left; | |
509 | struct sk_buff **frags, *first, *frag; | |
510 | int i; | |
511 | u16 seq; | |
512 | u8 *pos; | |
513 | int frag_threshold = tx->local->fragmentation_threshold; | |
514 | ||
515 | if (!tx->fragmented) | |
516 | return TXRX_CONTINUE; | |
517 | ||
518 | first = tx->skb; | |
519 | ||
520 | hdrlen = ieee80211_get_hdrlen(tx->fc); | |
521 | payload_len = first->len - hdrlen; | |
522 | per_fragm = frag_threshold - hdrlen - FCS_LEN; | |
523 | num_fragm = (payload_len + per_fragm - 1) / per_fragm; | |
524 | ||
525 | frags = kzalloc(num_fragm * sizeof(struct sk_buff *), GFP_ATOMIC); | |
526 | if (!frags) | |
527 | goto fail; | |
528 | ||
529 | hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_MOREFRAGS); | |
530 | seq = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_SEQ; | |
531 | pos = first->data + hdrlen + per_fragm; | |
532 | left = payload_len - per_fragm; | |
533 | for (i = 0; i < num_fragm - 1; i++) { | |
534 | struct ieee80211_hdr *fhdr; | |
535 | size_t copylen; | |
536 | ||
537 | if (left <= 0) | |
538 | goto fail; | |
539 | ||
540 | /* reserve enough extra head and tail room for possible | |
541 | * encryption */ | |
542 | frag = frags[i] = | |
b306f453 | 543 | dev_alloc_skb(tx->local->tx_headroom + |
f0706e82 JB |
544 | frag_threshold + |
545 | IEEE80211_ENCRYPT_HEADROOM + | |
546 | IEEE80211_ENCRYPT_TAILROOM); | |
547 | if (!frag) | |
548 | goto fail; | |
549 | /* Make sure that all fragments use the same priority so | |
550 | * that they end up using the same TX queue */ | |
551 | frag->priority = first->priority; | |
b306f453 JB |
552 | skb_reserve(frag, tx->local->tx_headroom + |
553 | IEEE80211_ENCRYPT_HEADROOM); | |
f0706e82 JB |
554 | fhdr = (struct ieee80211_hdr *) skb_put(frag, hdrlen); |
555 | memcpy(fhdr, first->data, hdrlen); | |
556 | if (i == num_fragm - 2) | |
557 | fhdr->frame_control &= cpu_to_le16(~IEEE80211_FCTL_MOREFRAGS); | |
558 | fhdr->seq_ctrl = cpu_to_le16(seq | ((i + 1) & IEEE80211_SCTL_FRAG)); | |
559 | copylen = left > per_fragm ? per_fragm : left; | |
560 | memcpy(skb_put(frag, copylen), pos, copylen); | |
561 | ||
562 | pos += copylen; | |
563 | left -= copylen; | |
564 | } | |
565 | skb_trim(first, hdrlen + per_fragm); | |
566 | ||
567 | tx->u.tx.num_extra_frag = num_fragm - 1; | |
568 | tx->u.tx.extra_frag = frags; | |
569 | ||
570 | return TXRX_CONTINUE; | |
571 | ||
572 | fail: | |
573 | printk(KERN_DEBUG "%s: failed to fragment frame\n", tx->dev->name); | |
574 | if (frags) { | |
575 | for (i = 0; i < num_fragm - 1; i++) | |
576 | if (frags[i]) | |
577 | dev_kfree_skb(frags[i]); | |
578 | kfree(frags); | |
579 | } | |
580 | I802_DEBUG_INC(tx->local->tx_handlers_drop_fragment); | |
581 | return TXRX_DROP; | |
582 | } | |
583 | ||
584 | ||
585 | static int wep_encrypt_skb(struct ieee80211_txrx_data *tx, struct sk_buff *skb) | |
586 | { | |
587 | if (tx->key->force_sw_encrypt) { | |
588 | if (ieee80211_wep_encrypt(tx->local, skb, tx->key)) | |
589 | return -1; | |
590 | } else { | |
591 | tx->u.tx.control->key_idx = tx->key->hw_key_idx; | |
592 | if (tx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) { | |
593 | if (ieee80211_wep_add_iv(tx->local, skb, tx->key) == | |
594 | NULL) | |
595 | return -1; | |
596 | } | |
597 | } | |
598 | return 0; | |
599 | } | |
600 | ||
601 | ||
602 | void ieee80211_tx_set_iswep(struct ieee80211_txrx_data *tx) | |
603 | { | |
604 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data; | |
605 | ||
606 | hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
607 | if (tx->u.tx.extra_frag) { | |
608 | struct ieee80211_hdr *fhdr; | |
609 | int i; | |
610 | for (i = 0; i < tx->u.tx.num_extra_frag; i++) { | |
611 | fhdr = (struct ieee80211_hdr *) | |
612 | tx->u.tx.extra_frag[i]->data; | |
613 | fhdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
614 | } | |
615 | } | |
616 | } | |
617 | ||
618 | ||
619 | static ieee80211_txrx_result | |
620 | ieee80211_tx_h_wep_encrypt(struct ieee80211_txrx_data *tx) | |
621 | { | |
622 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data; | |
623 | u16 fc; | |
624 | ||
625 | fc = le16_to_cpu(hdr->frame_control); | |
626 | ||
627 | if (!tx->key || tx->key->alg != ALG_WEP || | |
628 | ((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA && | |
629 | ((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT || | |
630 | (fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_AUTH))) | |
631 | return TXRX_CONTINUE; | |
632 | ||
633 | tx->u.tx.control->iv_len = WEP_IV_LEN; | |
634 | tx->u.tx.control->icv_len = WEP_ICV_LEN; | |
635 | ieee80211_tx_set_iswep(tx); | |
636 | ||
637 | if (wep_encrypt_skb(tx, tx->skb) < 0) { | |
638 | I802_DEBUG_INC(tx->local->tx_handlers_drop_wep); | |
639 | return TXRX_DROP; | |
640 | } | |
641 | ||
642 | if (tx->u.tx.extra_frag) { | |
643 | int i; | |
644 | for (i = 0; i < tx->u.tx.num_extra_frag; i++) { | |
645 | if (wep_encrypt_skb(tx, tx->u.tx.extra_frag[i]) < 0) { | |
646 | I802_DEBUG_INC(tx->local-> | |
647 | tx_handlers_drop_wep); | |
648 | return TXRX_DROP; | |
649 | } | |
650 | } | |
651 | } | |
652 | ||
653 | return TXRX_CONTINUE; | |
654 | } | |
655 | ||
656 | ||
657 | static int ieee80211_frame_duration(struct ieee80211_local *local, size_t len, | |
658 | int rate, int erp, int short_preamble) | |
659 | { | |
660 | int dur; | |
661 | ||
662 | /* calculate duration (in microseconds, rounded up to next higher | |
663 | * integer if it includes a fractional microsecond) to send frame of | |
664 | * len bytes (does not include FCS) at the given rate. Duration will | |
665 | * also include SIFS. | |
666 | * | |
667 | * rate is in 100 kbps, so divident is multiplied by 10 in the | |
668 | * DIV_ROUND_UP() operations. | |
669 | */ | |
670 | ||
671 | if (local->hw.conf.phymode == MODE_IEEE80211A || erp || | |
672 | local->hw.conf.phymode == MODE_ATHEROS_TURBO) { | |
673 | /* | |
674 | * OFDM: | |
675 | * | |
676 | * N_DBPS = DATARATE x 4 | |
677 | * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS) | |
678 | * (16 = SIGNAL time, 6 = tail bits) | |
679 | * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext | |
680 | * | |
681 | * T_SYM = 4 usec | |
682 | * 802.11a - 17.5.2: aSIFSTime = 16 usec | |
683 | * 802.11g - 19.8.4: aSIFSTime = 10 usec + | |
684 | * signal ext = 6 usec | |
685 | */ | |
686 | /* FIX: Atheros Turbo may have different (shorter) duration? */ | |
687 | dur = 16; /* SIFS + signal ext */ | |
688 | dur += 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */ | |
689 | dur += 4; /* 17.3.2.3: T_SIGNAL = 4 usec */ | |
690 | dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10, | |
691 | 4 * rate); /* T_SYM x N_SYM */ | |
692 | } else { | |
693 | /* | |
694 | * 802.11b or 802.11g with 802.11b compatibility: | |
695 | * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime + | |
696 | * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0. | |
697 | * | |
698 | * 802.11 (DS): 15.3.3, 802.11b: 18.3.4 | |
699 | * aSIFSTime = 10 usec | |
700 | * aPreambleLength = 144 usec or 72 usec with short preamble | |
701 | * aPLCPHeaderLength = 48 usec or 24 usec with short preamble | |
702 | */ | |
703 | dur = 10; /* aSIFSTime = 10 usec */ | |
704 | dur += short_preamble ? (72 + 24) : (144 + 48); | |
705 | ||
706 | dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate); | |
707 | } | |
708 | ||
709 | return dur; | |
710 | } | |
711 | ||
712 | ||
713 | /* Exported duration function for driver use */ | |
714 | __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, | |
715 | size_t frame_len, int rate) | |
716 | { | |
717 | struct ieee80211_local *local = hw_to_local(hw); | |
718 | u16 dur; | |
719 | int erp; | |
720 | ||
721 | erp = ieee80211_is_erp_rate(hw->conf.phymode, rate); | |
722 | dur = ieee80211_frame_duration(local, frame_len, rate, | |
723 | erp, local->short_preamble); | |
724 | ||
725 | return cpu_to_le16(dur); | |
726 | } | |
727 | EXPORT_SYMBOL(ieee80211_generic_frame_duration); | |
728 | ||
729 | ||
730 | static u16 ieee80211_duration(struct ieee80211_txrx_data *tx, int group_addr, | |
731 | int next_frag_len) | |
732 | { | |
733 | int rate, mrate, erp, dur, i; | |
734 | struct ieee80211_rate *txrate = tx->u.tx.rate; | |
735 | struct ieee80211_local *local = tx->local; | |
736 | struct ieee80211_hw_mode *mode = tx->u.tx.mode; | |
737 | ||
738 | erp = txrate->flags & IEEE80211_RATE_ERP; | |
739 | ||
740 | /* | |
741 | * data and mgmt (except PS Poll): | |
742 | * - during CFP: 32768 | |
743 | * - during contention period: | |
744 | * if addr1 is group address: 0 | |
745 | * if more fragments = 0 and addr1 is individual address: time to | |
746 | * transmit one ACK plus SIFS | |
747 | * if more fragments = 1 and addr1 is individual address: time to | |
748 | * transmit next fragment plus 2 x ACK plus 3 x SIFS | |
749 | * | |
750 | * IEEE 802.11, 9.6: | |
751 | * - control response frame (CTS or ACK) shall be transmitted using the | |
752 | * same rate as the immediately previous frame in the frame exchange | |
753 | * sequence, if this rate belongs to the PHY mandatory rates, or else | |
754 | * at the highest possible rate belonging to the PHY rates in the | |
755 | * BSSBasicRateSet | |
756 | */ | |
757 | ||
758 | if ((tx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL) { | |
759 | /* TODO: These control frames are not currently sent by | |
760 | * 80211.o, but should they be implemented, this function | |
761 | * needs to be updated to support duration field calculation. | |
762 | * | |
763 | * RTS: time needed to transmit pending data/mgmt frame plus | |
764 | * one CTS frame plus one ACK frame plus 3 x SIFS | |
765 | * CTS: duration of immediately previous RTS minus time | |
766 | * required to transmit CTS and its SIFS | |
767 | * ACK: 0 if immediately previous directed data/mgmt had | |
768 | * more=0, with more=1 duration in ACK frame is duration | |
769 | * from previous frame minus time needed to transmit ACK | |
770 | * and its SIFS | |
771 | * PS Poll: BIT(15) | BIT(14) | aid | |
772 | */ | |
773 | return 0; | |
774 | } | |
775 | ||
776 | /* data/mgmt */ | |
777 | if (0 /* FIX: data/mgmt during CFP */) | |
778 | return 32768; | |
779 | ||
780 | if (group_addr) /* Group address as the destination - no ACK */ | |
781 | return 0; | |
782 | ||
783 | /* Individual destination address: | |
784 | * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes) | |
785 | * CTS and ACK frames shall be transmitted using the highest rate in | |
786 | * basic rate set that is less than or equal to the rate of the | |
787 | * immediately previous frame and that is using the same modulation | |
788 | * (CCK or OFDM). If no basic rate set matches with these requirements, | |
789 | * the highest mandatory rate of the PHY that is less than or equal to | |
790 | * the rate of the previous frame is used. | |
791 | * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps | |
792 | */ | |
793 | rate = -1; | |
794 | mrate = 10; /* use 1 Mbps if everything fails */ | |
795 | for (i = 0; i < mode->num_rates; i++) { | |
796 | struct ieee80211_rate *r = &mode->rates[i]; | |
797 | if (r->rate > txrate->rate) | |
798 | break; | |
799 | ||
800 | if (IEEE80211_RATE_MODULATION(txrate->flags) != | |
801 | IEEE80211_RATE_MODULATION(r->flags)) | |
802 | continue; | |
803 | ||
804 | if (r->flags & IEEE80211_RATE_BASIC) | |
805 | rate = r->rate; | |
806 | else if (r->flags & IEEE80211_RATE_MANDATORY) | |
807 | mrate = r->rate; | |
808 | } | |
809 | if (rate == -1) { | |
810 | /* No matching basic rate found; use highest suitable mandatory | |
811 | * PHY rate */ | |
812 | rate = mrate; | |
813 | } | |
814 | ||
815 | /* Time needed to transmit ACK | |
816 | * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up | |
817 | * to closest integer */ | |
818 | ||
819 | dur = ieee80211_frame_duration(local, 10, rate, erp, | |
820 | local->short_preamble); | |
821 | ||
822 | if (next_frag_len) { | |
823 | /* Frame is fragmented: duration increases with time needed to | |
824 | * transmit next fragment plus ACK and 2 x SIFS. */ | |
825 | dur *= 2; /* ACK + SIFS */ | |
826 | /* next fragment */ | |
827 | dur += ieee80211_frame_duration(local, next_frag_len, | |
828 | txrate->rate, erp, | |
829 | local->short_preamble); | |
830 | } | |
831 | ||
832 | return dur; | |
833 | } | |
834 | ||
835 | ||
836 | static ieee80211_txrx_result | |
837 | ieee80211_tx_h_misc(struct ieee80211_txrx_data *tx) | |
838 | { | |
839 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data; | |
840 | u16 dur; | |
841 | struct ieee80211_tx_control *control = tx->u.tx.control; | |
842 | struct ieee80211_hw_mode *mode = tx->u.tx.mode; | |
843 | ||
844 | if (!is_multicast_ether_addr(hdr->addr1)) { | |
845 | if (tx->skb->len + FCS_LEN > tx->local->rts_threshold && | |
846 | tx->local->rts_threshold < IEEE80211_MAX_RTS_THRESHOLD) { | |
847 | control->flags |= IEEE80211_TXCTL_USE_RTS_CTS; | |
848 | control->retry_limit = | |
849 | tx->local->long_retry_limit; | |
850 | } else { | |
851 | control->retry_limit = | |
852 | tx->local->short_retry_limit; | |
853 | } | |
854 | } else { | |
855 | control->retry_limit = 1; | |
856 | } | |
857 | ||
858 | if (tx->fragmented) { | |
859 | /* Do not use multiple retry rates when sending fragmented | |
860 | * frames. | |
861 | * TODO: The last fragment could still use multiple retry | |
862 | * rates. */ | |
863 | control->alt_retry_rate = -1; | |
864 | } | |
865 | ||
866 | /* Use CTS protection for unicast frames sent using extended rates if | |
867 | * there are associated non-ERP stations and RTS/CTS is not configured | |
868 | * for the frame. */ | |
869 | if (mode->mode == MODE_IEEE80211G && | |
870 | (tx->u.tx.rate->flags & IEEE80211_RATE_ERP) && | |
63fc33ce | 871 | tx->u.tx.unicast && tx->sdata->use_protection && |
f0706e82 JB |
872 | !(control->flags & IEEE80211_TXCTL_USE_RTS_CTS)) |
873 | control->flags |= IEEE80211_TXCTL_USE_CTS_PROTECT; | |
874 | ||
875 | /* Setup duration field for the first fragment of the frame. Duration | |
876 | * for remaining fragments will be updated when they are being sent | |
877 | * to low-level driver in ieee80211_tx(). */ | |
878 | dur = ieee80211_duration(tx, is_multicast_ether_addr(hdr->addr1), | |
879 | tx->fragmented ? tx->u.tx.extra_frag[0]->len : | |
880 | 0); | |
881 | hdr->duration_id = cpu_to_le16(dur); | |
882 | ||
883 | if ((control->flags & IEEE80211_TXCTL_USE_RTS_CTS) || | |
884 | (control->flags & IEEE80211_TXCTL_USE_CTS_PROTECT)) { | |
885 | struct ieee80211_rate *rate; | |
886 | ||
887 | /* Do not use multiple retry rates when using RTS/CTS */ | |
888 | control->alt_retry_rate = -1; | |
889 | ||
890 | /* Use min(data rate, max base rate) as CTS/RTS rate */ | |
891 | rate = tx->u.tx.rate; | |
892 | while (rate > mode->rates && | |
893 | !(rate->flags & IEEE80211_RATE_BASIC)) | |
894 | rate--; | |
895 | ||
896 | control->rts_cts_rate = rate->val; | |
897 | control->rts_rate = rate; | |
898 | } | |
899 | ||
900 | if (tx->sta) { | |
901 | tx->sta->tx_packets++; | |
902 | tx->sta->tx_fragments++; | |
903 | tx->sta->tx_bytes += tx->skb->len; | |
904 | if (tx->u.tx.extra_frag) { | |
905 | int i; | |
906 | tx->sta->tx_fragments += tx->u.tx.num_extra_frag; | |
907 | for (i = 0; i < tx->u.tx.num_extra_frag; i++) { | |
908 | tx->sta->tx_bytes += | |
909 | tx->u.tx.extra_frag[i]->len; | |
910 | } | |
911 | } | |
912 | } | |
913 | ||
914 | return TXRX_CONTINUE; | |
915 | } | |
916 | ||
917 | ||
918 | static ieee80211_txrx_result | |
919 | ieee80211_tx_h_check_assoc(struct ieee80211_txrx_data *tx) | |
920 | { | |
921 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
922 | struct sk_buff *skb = tx->skb; | |
923 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
924 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ | |
925 | u32 sta_flags; | |
926 | ||
927 | if (unlikely(tx->local->sta_scanning != 0) && | |
928 | ((tx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT || | |
929 | (tx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_PROBE_REQ)) | |
930 | return TXRX_DROP; | |
931 | ||
932 | if (tx->u.tx.ps_buffered) | |
933 | return TXRX_CONTINUE; | |
934 | ||
935 | sta_flags = tx->sta ? tx->sta->flags : 0; | |
936 | ||
937 | if (likely(tx->u.tx.unicast)) { | |
938 | if (unlikely(!(sta_flags & WLAN_STA_ASSOC) && | |
939 | tx->sdata->type != IEEE80211_IF_TYPE_IBSS && | |
940 | (tx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA)) { | |
941 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
942 | printk(KERN_DEBUG "%s: dropped data frame to not " | |
943 | "associated station " MAC_FMT "\n", | |
944 | tx->dev->name, MAC_ARG(hdr->addr1)); | |
945 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ | |
946 | I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc); | |
947 | return TXRX_DROP; | |
948 | } | |
949 | } else { | |
950 | if (unlikely((tx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA && | |
951 | tx->local->num_sta == 0 && | |
952 | !tx->local->allow_broadcast_always && | |
953 | tx->sdata->type != IEEE80211_IF_TYPE_IBSS)) { | |
954 | /* | |
955 | * No associated STAs - no need to send multicast | |
956 | * frames. | |
957 | */ | |
958 | return TXRX_DROP; | |
959 | } | |
960 | return TXRX_CONTINUE; | |
961 | } | |
962 | ||
963 | if (unlikely(!tx->u.tx.mgmt_interface && tx->sdata->ieee802_1x && | |
964 | !(sta_flags & WLAN_STA_AUTHORIZED))) { | |
965 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
966 | printk(KERN_DEBUG "%s: dropped frame to " MAC_FMT | |
967 | " (unauthorized port)\n", tx->dev->name, | |
968 | MAC_ARG(hdr->addr1)); | |
969 | #endif | |
970 | I802_DEBUG_INC(tx->local->tx_handlers_drop_unauth_port); | |
971 | return TXRX_DROP; | |
972 | } | |
973 | ||
974 | return TXRX_CONTINUE; | |
975 | } | |
976 | ||
977 | static ieee80211_txrx_result | |
978 | ieee80211_tx_h_sequence(struct ieee80211_txrx_data *tx) | |
979 | { | |
980 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; | |
981 | ||
982 | if (ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_control)) >= 24) | |
983 | ieee80211_include_sequence(tx->sdata, hdr); | |
984 | ||
985 | return TXRX_CONTINUE; | |
986 | } | |
987 | ||
988 | /* This function is called whenever the AP is about to exceed the maximum limit | |
989 | * of buffered frames for power saving STAs. This situation should not really | |
990 | * happen often during normal operation, so dropping the oldest buffered packet | |
991 | * from each queue should be OK to make some room for new frames. */ | |
992 | static void purge_old_ps_buffers(struct ieee80211_local *local) | |
993 | { | |
994 | int total = 0, purged = 0; | |
995 | struct sk_buff *skb; | |
996 | struct ieee80211_sub_if_data *sdata; | |
997 | struct sta_info *sta; | |
998 | ||
999 | read_lock(&local->sub_if_lock); | |
1000 | list_for_each_entry(sdata, &local->sub_if_list, list) { | |
1001 | struct ieee80211_if_ap *ap; | |
1002 | if (sdata->dev == local->mdev || | |
1003 | sdata->type != IEEE80211_IF_TYPE_AP) | |
1004 | continue; | |
1005 | ap = &sdata->u.ap; | |
1006 | skb = skb_dequeue(&ap->ps_bc_buf); | |
1007 | if (skb) { | |
1008 | purged++; | |
1009 | dev_kfree_skb(skb); | |
1010 | } | |
1011 | total += skb_queue_len(&ap->ps_bc_buf); | |
1012 | } | |
1013 | read_unlock(&local->sub_if_lock); | |
1014 | ||
1015 | spin_lock_bh(&local->sta_lock); | |
1016 | list_for_each_entry(sta, &local->sta_list, list) { | |
1017 | skb = skb_dequeue(&sta->ps_tx_buf); | |
1018 | if (skb) { | |
1019 | purged++; | |
1020 | dev_kfree_skb(skb); | |
1021 | } | |
1022 | total += skb_queue_len(&sta->ps_tx_buf); | |
1023 | } | |
1024 | spin_unlock_bh(&local->sta_lock); | |
1025 | ||
1026 | local->total_ps_buffered = total; | |
1027 | printk(KERN_DEBUG "%s: PS buffers full - purged %d frames\n", | |
1028 | local->mdev->name, purged); | |
1029 | } | |
1030 | ||
1031 | ||
1032 | static inline ieee80211_txrx_result | |
1033 | ieee80211_tx_h_multicast_ps_buf(struct ieee80211_txrx_data *tx) | |
1034 | { | |
1035 | /* broadcast/multicast frame */ | |
1036 | /* If any of the associated stations is in power save mode, | |
1037 | * the frame is buffered to be sent after DTIM beacon frame */ | |
1038 | if ((tx->local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING) && | |
1039 | tx->sdata->type != IEEE80211_IF_TYPE_WDS && | |
1040 | tx->sdata->bss && atomic_read(&tx->sdata->bss->num_sta_ps) && | |
1041 | !(tx->fc & IEEE80211_FCTL_ORDER)) { | |
1042 | if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER) | |
1043 | purge_old_ps_buffers(tx->local); | |
1044 | if (skb_queue_len(&tx->sdata->bss->ps_bc_buf) >= | |
1045 | AP_MAX_BC_BUFFER) { | |
1046 | if (net_ratelimit()) { | |
1047 | printk(KERN_DEBUG "%s: BC TX buffer full - " | |
1048 | "dropping the oldest frame\n", | |
1049 | tx->dev->name); | |
1050 | } | |
1051 | dev_kfree_skb(skb_dequeue(&tx->sdata->bss->ps_bc_buf)); | |
1052 | } else | |
1053 | tx->local->total_ps_buffered++; | |
1054 | skb_queue_tail(&tx->sdata->bss->ps_bc_buf, tx->skb); | |
1055 | return TXRX_QUEUED; | |
1056 | } | |
1057 | ||
1058 | return TXRX_CONTINUE; | |
1059 | } | |
1060 | ||
1061 | ||
1062 | static inline ieee80211_txrx_result | |
1063 | ieee80211_tx_h_unicast_ps_buf(struct ieee80211_txrx_data *tx) | |
1064 | { | |
1065 | struct sta_info *sta = tx->sta; | |
1066 | ||
1067 | if (unlikely(!sta || | |
1068 | ((tx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT && | |
1069 | (tx->fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP))) | |
1070 | return TXRX_CONTINUE; | |
1071 | ||
1072 | if (unlikely((sta->flags & WLAN_STA_PS) && !sta->pspoll)) { | |
1073 | struct ieee80211_tx_packet_data *pkt_data; | |
1074 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG | |
1075 | printk(KERN_DEBUG "STA " MAC_FMT " aid %d: PS buffer (entries " | |
1076 | "before %d)\n", | |
1077 | MAC_ARG(sta->addr), sta->aid, | |
1078 | skb_queue_len(&sta->ps_tx_buf)); | |
1079 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ | |
1080 | sta->flags |= WLAN_STA_TIM; | |
1081 | if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER) | |
1082 | purge_old_ps_buffers(tx->local); | |
1083 | if (skb_queue_len(&sta->ps_tx_buf) >= STA_MAX_TX_BUFFER) { | |
1084 | struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf); | |
1085 | if (net_ratelimit()) { | |
1086 | printk(KERN_DEBUG "%s: STA " MAC_FMT " TX " | |
1087 | "buffer full - dropping oldest frame\n", | |
1088 | tx->dev->name, MAC_ARG(sta->addr)); | |
1089 | } | |
1090 | dev_kfree_skb(old); | |
1091 | } else | |
1092 | tx->local->total_ps_buffered++; | |
1093 | /* Queue frame to be sent after STA sends an PS Poll frame */ | |
1094 | if (skb_queue_empty(&sta->ps_tx_buf)) { | |
1095 | if (tx->local->ops->set_tim) | |
1096 | tx->local->ops->set_tim(local_to_hw(tx->local), | |
1097 | sta->aid, 1); | |
1098 | if (tx->sdata->bss) | |
1099 | bss_tim_set(tx->local, tx->sdata->bss, sta->aid); | |
1100 | } | |
1101 | pkt_data = (struct ieee80211_tx_packet_data *)tx->skb->cb; | |
1102 | pkt_data->jiffies = jiffies; | |
1103 | skb_queue_tail(&sta->ps_tx_buf, tx->skb); | |
1104 | return TXRX_QUEUED; | |
1105 | } | |
1106 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG | |
1107 | else if (unlikely(sta->flags & WLAN_STA_PS)) { | |
1108 | printk(KERN_DEBUG "%s: STA " MAC_FMT " in PS mode, but pspoll " | |
1109 | "set -> send frame\n", tx->dev->name, | |
1110 | MAC_ARG(sta->addr)); | |
1111 | } | |
1112 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ | |
1113 | sta->pspoll = 0; | |
1114 | ||
1115 | return TXRX_CONTINUE; | |
1116 | } | |
1117 | ||
1118 | ||
1119 | static ieee80211_txrx_result | |
1120 | ieee80211_tx_h_ps_buf(struct ieee80211_txrx_data *tx) | |
1121 | { | |
1122 | if (unlikely(tx->u.tx.ps_buffered)) | |
1123 | return TXRX_CONTINUE; | |
1124 | ||
1125 | if (tx->u.tx.unicast) | |
1126 | return ieee80211_tx_h_unicast_ps_buf(tx); | |
1127 | else | |
1128 | return ieee80211_tx_h_multicast_ps_buf(tx); | |
1129 | } | |
1130 | ||
1131 | ||
e4c967c6 AG |
1132 | /* |
1133 | * deal with packet injection down monitor interface | |
1134 | * with Radiotap Header -- only called for monitor mode interface | |
1135 | */ | |
1136 | ||
1137 | static ieee80211_txrx_result | |
1138 | __ieee80211_parse_tx_radiotap( | |
1139 | struct ieee80211_txrx_data *tx, | |
1140 | struct sk_buff *skb, struct ieee80211_tx_control *control) | |
1141 | { | |
1142 | /* | |
1143 | * this is the moment to interpret and discard the radiotap header that | |
1144 | * must be at the start of the packet injected in Monitor mode | |
1145 | * | |
1146 | * Need to take some care with endian-ness since radiotap | |
1147 | * args are little-endian | |
1148 | */ | |
1149 | ||
1150 | struct ieee80211_radiotap_iterator iterator; | |
1151 | struct ieee80211_radiotap_header *rthdr = | |
1152 | (struct ieee80211_radiotap_header *) skb->data; | |
1153 | struct ieee80211_hw_mode *mode = tx->local->hw.conf.mode; | |
1154 | int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len); | |
1155 | ||
1156 | /* | |
1157 | * default control situation for all injected packets | |
1158 | * FIXME: this does not suit all usage cases, expand to allow control | |
1159 | */ | |
1160 | ||
1161 | control->retry_limit = 1; /* no retry */ | |
1162 | control->key_idx = -1; /* no encryption key */ | |
1163 | control->flags &= ~(IEEE80211_TXCTL_USE_RTS_CTS | | |
1164 | IEEE80211_TXCTL_USE_CTS_PROTECT); | |
1165 | control->flags |= IEEE80211_TXCTL_DO_NOT_ENCRYPT | | |
1166 | IEEE80211_TXCTL_NO_ACK; | |
1167 | control->antenna_sel_tx = 0; /* default to default antenna */ | |
1168 | ||
1169 | /* | |
1170 | * for every radiotap entry that is present | |
1171 | * (ieee80211_radiotap_iterator_next returns -ENOENT when no more | |
1172 | * entries present, or -EINVAL on error) | |
1173 | */ | |
1174 | ||
1175 | while (!ret) { | |
1176 | int i, target_rate; | |
1177 | ||
1178 | ret = ieee80211_radiotap_iterator_next(&iterator); | |
1179 | ||
1180 | if (ret) | |
1181 | continue; | |
1182 | ||
1183 | /* see if this argument is something we can use */ | |
1184 | switch (iterator.this_arg_index) { | |
1185 | /* | |
1186 | * You must take care when dereferencing iterator.this_arg | |
1187 | * for multibyte types... the pointer is not aligned. Use | |
1188 | * get_unaligned((type *)iterator.this_arg) to dereference | |
1189 | * iterator.this_arg for type "type" safely on all arches. | |
1190 | */ | |
1191 | case IEEE80211_RADIOTAP_RATE: | |
1192 | /* | |
1193 | * radiotap rate u8 is in 500kbps units eg, 0x02=1Mbps | |
1194 | * ieee80211 rate int is in 100kbps units eg, 0x0a=1Mbps | |
1195 | */ | |
1196 | target_rate = (*iterator.this_arg) * 5; | |
1197 | for (i = 0; i < mode->num_rates; i++) { | |
1198 | struct ieee80211_rate *r = &mode->rates[i]; | |
1199 | ||
1200 | if (r->rate > target_rate) | |
1201 | continue; | |
1202 | ||
1203 | control->rate = r; | |
1204 | ||
1205 | if (r->flags & IEEE80211_RATE_PREAMBLE2) | |
1206 | control->tx_rate = r->val2; | |
1207 | else | |
1208 | control->tx_rate = r->val; | |
1209 | ||
1210 | /* end on exact match */ | |
1211 | if (r->rate == target_rate) | |
1212 | i = mode->num_rates; | |
1213 | } | |
1214 | break; | |
1215 | ||
1216 | case IEEE80211_RADIOTAP_ANTENNA: | |
1217 | /* | |
1218 | * radiotap uses 0 for 1st ant, mac80211 is 1 for | |
1219 | * 1st ant | |
1220 | */ | |
1221 | control->antenna_sel_tx = (*iterator.this_arg) + 1; | |
1222 | break; | |
1223 | ||
1224 | case IEEE80211_RADIOTAP_DBM_TX_POWER: | |
1225 | control->power_level = *iterator.this_arg; | |
1226 | break; | |
1227 | ||
1228 | case IEEE80211_RADIOTAP_FLAGS: | |
1229 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) { | |
1230 | /* | |
1231 | * this indicates that the skb we have been | |
1232 | * handed has the 32-bit FCS CRC at the end... | |
1233 | * we should react to that by snipping it off | |
1234 | * because it will be recomputed and added | |
1235 | * on transmission | |
1236 | */ | |
1237 | if (skb->len < (iterator.max_length + FCS_LEN)) | |
1238 | return TXRX_DROP; | |
1239 | ||
1240 | skb_trim(skb, skb->len - FCS_LEN); | |
1241 | } | |
1242 | break; | |
1243 | ||
1244 | default: | |
1245 | break; | |
1246 | } | |
1247 | } | |
1248 | ||
1249 | if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */ | |
1250 | return TXRX_DROP; | |
1251 | ||
1252 | /* | |
1253 | * remove the radiotap header | |
1254 | * iterator->max_length was sanity-checked against | |
1255 | * skb->len by iterator init | |
1256 | */ | |
1257 | skb_pull(skb, iterator.max_length); | |
1258 | ||
1259 | return TXRX_CONTINUE; | |
1260 | } | |
1261 | ||
1262 | ||
1263 | static ieee80211_txrx_result inline | |
f0706e82 JB |
1264 | __ieee80211_tx_prepare(struct ieee80211_txrx_data *tx, |
1265 | struct sk_buff *skb, | |
1266 | struct net_device *dev, | |
1267 | struct ieee80211_tx_control *control) | |
1268 | { | |
1269 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1270 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
e4c967c6 AG |
1271 | struct ieee80211_sub_if_data *sdata; |
1272 | ieee80211_txrx_result res = TXRX_CONTINUE; | |
1273 | ||
f0706e82 JB |
1274 | int hdrlen; |
1275 | ||
1276 | memset(tx, 0, sizeof(*tx)); | |
1277 | tx->skb = skb; | |
1278 | tx->dev = dev; /* use original interface */ | |
1279 | tx->local = local; | |
1280 | tx->sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1281 | tx->sta = sta_info_get(local, hdr->addr1); | |
1282 | tx->fc = le16_to_cpu(hdr->frame_control); | |
e4c967c6 AG |
1283 | |
1284 | /* | |
1285 | * set defaults for things that can be set by | |
1286 | * injected radiotap headers | |
1287 | */ | |
f0706e82 | 1288 | control->power_level = local->hw.conf.power_level; |
e4c967c6 AG |
1289 | control->antenna_sel_tx = local->hw.conf.antenna_sel_tx; |
1290 | if (local->sta_antenna_sel != STA_ANTENNA_SEL_AUTO && tx->sta) | |
1291 | control->antenna_sel_tx = tx->sta->antenna_sel_tx; | |
1292 | ||
1293 | /* process and remove the injection radiotap header */ | |
1294 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1295 | if (unlikely(sdata->type == IEEE80211_IF_TYPE_MNTR)) { | |
1296 | if (__ieee80211_parse_tx_radiotap(tx, skb, control) == | |
1297 | TXRX_DROP) { | |
1298 | return TXRX_DROP; | |
1299 | } | |
1300 | /* | |
1301 | * we removed the radiotap header after this point, | |
1302 | * we filled control with what we could use | |
1303 | * set to the actual ieee header now | |
1304 | */ | |
1305 | hdr = (struct ieee80211_hdr *) skb->data; | |
1306 | res = TXRX_QUEUED; /* indication it was monitor packet */ | |
1307 | } | |
1308 | ||
f0706e82 JB |
1309 | tx->u.tx.control = control; |
1310 | tx->u.tx.unicast = !is_multicast_ether_addr(hdr->addr1); | |
1311 | if (is_multicast_ether_addr(hdr->addr1)) | |
1312 | control->flags |= IEEE80211_TXCTL_NO_ACK; | |
1313 | else | |
1314 | control->flags &= ~IEEE80211_TXCTL_NO_ACK; | |
1315 | tx->fragmented = local->fragmentation_threshold < | |
1316 | IEEE80211_MAX_FRAG_THRESHOLD && tx->u.tx.unicast && | |
1317 | skb->len + FCS_LEN > local->fragmentation_threshold && | |
1318 | (!local->ops->set_frag_threshold); | |
1319 | if (!tx->sta) | |
1320 | control->flags |= IEEE80211_TXCTL_CLEAR_DST_MASK; | |
1321 | else if (tx->sta->clear_dst_mask) { | |
1322 | control->flags |= IEEE80211_TXCTL_CLEAR_DST_MASK; | |
1323 | tx->sta->clear_dst_mask = 0; | |
1324 | } | |
f0706e82 JB |
1325 | hdrlen = ieee80211_get_hdrlen(tx->fc); |
1326 | if (skb->len > hdrlen + sizeof(rfc1042_header) + 2) { | |
1327 | u8 *pos = &skb->data[hdrlen + sizeof(rfc1042_header)]; | |
1328 | tx->ethertype = (pos[0] << 8) | pos[1]; | |
1329 | } | |
1330 | control->flags |= IEEE80211_TXCTL_FIRST_FRAGMENT; | |
1331 | ||
e4c967c6 | 1332 | return res; |
f0706e82 JB |
1333 | } |
1334 | ||
1335 | static int inline is_ieee80211_device(struct net_device *dev, | |
1336 | struct net_device *master) | |
1337 | { | |
1338 | return (wdev_priv(dev->ieee80211_ptr) == | |
1339 | wdev_priv(master->ieee80211_ptr)); | |
1340 | } | |
1341 | ||
1342 | /* Device in tx->dev has a reference added; use dev_put(tx->dev) when | |
1343 | * finished with it. */ | |
1344 | static int inline ieee80211_tx_prepare(struct ieee80211_txrx_data *tx, | |
1345 | struct sk_buff *skb, | |
1346 | struct net_device *mdev, | |
1347 | struct ieee80211_tx_control *control) | |
1348 | { | |
1349 | struct ieee80211_tx_packet_data *pkt_data; | |
1350 | struct net_device *dev; | |
1351 | ||
1352 | pkt_data = (struct ieee80211_tx_packet_data *)skb->cb; | |
1353 | dev = dev_get_by_index(pkt_data->ifindex); | |
1354 | if (unlikely(dev && !is_ieee80211_device(dev, mdev))) { | |
1355 | dev_put(dev); | |
1356 | dev = NULL; | |
1357 | } | |
1358 | if (unlikely(!dev)) | |
1359 | return -ENODEV; | |
1360 | __ieee80211_tx_prepare(tx, skb, dev, control); | |
1361 | return 0; | |
1362 | } | |
1363 | ||
1364 | static inline int __ieee80211_queue_stopped(const struct ieee80211_local *local, | |
1365 | int queue) | |
1366 | { | |
1367 | return test_bit(IEEE80211_LINK_STATE_XOFF, &local->state[queue]); | |
1368 | } | |
1369 | ||
1370 | static inline int __ieee80211_queue_pending(const struct ieee80211_local *local, | |
1371 | int queue) | |
1372 | { | |
1373 | return test_bit(IEEE80211_LINK_STATE_PENDING, &local->state[queue]); | |
1374 | } | |
1375 | ||
1376 | #define IEEE80211_TX_OK 0 | |
1377 | #define IEEE80211_TX_AGAIN 1 | |
1378 | #define IEEE80211_TX_FRAG_AGAIN 2 | |
1379 | ||
1380 | static int __ieee80211_tx(struct ieee80211_local *local, struct sk_buff *skb, | |
1381 | struct ieee80211_txrx_data *tx) | |
1382 | { | |
1383 | struct ieee80211_tx_control *control = tx->u.tx.control; | |
1384 | int ret, i; | |
1385 | ||
1386 | if (!ieee80211_qdisc_installed(local->mdev) && | |
1387 | __ieee80211_queue_stopped(local, 0)) { | |
1388 | netif_stop_queue(local->mdev); | |
1389 | return IEEE80211_TX_AGAIN; | |
1390 | } | |
1391 | if (skb) { | |
1392 | ieee80211_dump_frame(local->mdev->name, "TX to low-level driver", skb); | |
1393 | ret = local->ops->tx(local_to_hw(local), skb, control); | |
1394 | if (ret) | |
1395 | return IEEE80211_TX_AGAIN; | |
1396 | local->mdev->trans_start = jiffies; | |
1397 | ieee80211_led_tx(local, 1); | |
1398 | } | |
1399 | if (tx->u.tx.extra_frag) { | |
1400 | control->flags &= ~(IEEE80211_TXCTL_USE_RTS_CTS | | |
1401 | IEEE80211_TXCTL_USE_CTS_PROTECT | | |
1402 | IEEE80211_TXCTL_CLEAR_DST_MASK | | |
1403 | IEEE80211_TXCTL_FIRST_FRAGMENT); | |
1404 | for (i = 0; i < tx->u.tx.num_extra_frag; i++) { | |
1405 | if (!tx->u.tx.extra_frag[i]) | |
1406 | continue; | |
1407 | if (__ieee80211_queue_stopped(local, control->queue)) | |
1408 | return IEEE80211_TX_FRAG_AGAIN; | |
1409 | if (i == tx->u.tx.num_extra_frag) { | |
1410 | control->tx_rate = tx->u.tx.last_frag_hwrate; | |
1411 | control->rate = tx->u.tx.last_frag_rate; | |
1412 | if (tx->u.tx.probe_last_frag) | |
1413 | control->flags |= | |
1414 | IEEE80211_TXCTL_RATE_CTRL_PROBE; | |
1415 | else | |
1416 | control->flags &= | |
1417 | ~IEEE80211_TXCTL_RATE_CTRL_PROBE; | |
1418 | } | |
1419 | ||
1420 | ieee80211_dump_frame(local->mdev->name, | |
1421 | "TX to low-level driver", | |
1422 | tx->u.tx.extra_frag[i]); | |
1423 | ret = local->ops->tx(local_to_hw(local), | |
1424 | tx->u.tx.extra_frag[i], | |
1425 | control); | |
1426 | if (ret) | |
1427 | return IEEE80211_TX_FRAG_AGAIN; | |
1428 | local->mdev->trans_start = jiffies; | |
1429 | ieee80211_led_tx(local, 1); | |
1430 | tx->u.tx.extra_frag[i] = NULL; | |
1431 | } | |
1432 | kfree(tx->u.tx.extra_frag); | |
1433 | tx->u.tx.extra_frag = NULL; | |
1434 | } | |
1435 | return IEEE80211_TX_OK; | |
1436 | } | |
1437 | ||
1438 | static int ieee80211_tx(struct net_device *dev, struct sk_buff *skb, | |
1439 | struct ieee80211_tx_control *control, int mgmt) | |
1440 | { | |
1441 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1442 | struct sta_info *sta; | |
1443 | ieee80211_tx_handler *handler; | |
1444 | struct ieee80211_txrx_data tx; | |
e4c967c6 | 1445 | ieee80211_txrx_result res = TXRX_DROP, res_prepare; |
f0706e82 JB |
1446 | int ret, i; |
1447 | ||
1448 | WARN_ON(__ieee80211_queue_pending(local, control->queue)); | |
1449 | ||
1450 | if (unlikely(skb->len < 10)) { | |
1451 | dev_kfree_skb(skb); | |
1452 | return 0; | |
1453 | } | |
1454 | ||
e4c967c6 AG |
1455 | res_prepare = __ieee80211_tx_prepare(&tx, skb, dev, control); |
1456 | ||
1457 | if (res_prepare == TXRX_DROP) { | |
1458 | dev_kfree_skb(skb); | |
1459 | return 0; | |
1460 | } | |
1461 | ||
f0706e82 JB |
1462 | sta = tx.sta; |
1463 | tx.u.tx.mgmt_interface = mgmt; | |
1464 | tx.u.tx.mode = local->hw.conf.mode; | |
1465 | ||
e4c967c6 AG |
1466 | if (res_prepare == TXRX_QUEUED) { /* if it was an injected packet */ |
1467 | res = TXRX_CONTINUE; | |
1468 | } else { | |
1469 | for (handler = local->tx_handlers; *handler != NULL; | |
1470 | handler++) { | |
1471 | res = (*handler)(&tx); | |
1472 | if (res != TXRX_CONTINUE) | |
1473 | break; | |
1474 | } | |
f0706e82 JB |
1475 | } |
1476 | ||
1477 | skb = tx.skb; /* handlers are allowed to change skb */ | |
1478 | ||
1479 | if (sta) | |
1480 | sta_info_put(sta); | |
1481 | ||
1482 | if (unlikely(res == TXRX_DROP)) { | |
1483 | I802_DEBUG_INC(local->tx_handlers_drop); | |
1484 | goto drop; | |
1485 | } | |
1486 | ||
1487 | if (unlikely(res == TXRX_QUEUED)) { | |
1488 | I802_DEBUG_INC(local->tx_handlers_queued); | |
1489 | return 0; | |
1490 | } | |
1491 | ||
1492 | if (tx.u.tx.extra_frag) { | |
1493 | for (i = 0; i < tx.u.tx.num_extra_frag; i++) { | |
1494 | int next_len, dur; | |
1495 | struct ieee80211_hdr *hdr = | |
1496 | (struct ieee80211_hdr *) | |
1497 | tx.u.tx.extra_frag[i]->data; | |
1498 | ||
1499 | if (i + 1 < tx.u.tx.num_extra_frag) { | |
1500 | next_len = tx.u.tx.extra_frag[i + 1]->len; | |
1501 | } else { | |
1502 | next_len = 0; | |
1503 | tx.u.tx.rate = tx.u.tx.last_frag_rate; | |
1504 | tx.u.tx.last_frag_hwrate = tx.u.tx.rate->val; | |
1505 | } | |
1506 | dur = ieee80211_duration(&tx, 0, next_len); | |
1507 | hdr->duration_id = cpu_to_le16(dur); | |
1508 | } | |
1509 | } | |
1510 | ||
1511 | retry: | |
1512 | ret = __ieee80211_tx(local, skb, &tx); | |
1513 | if (ret) { | |
1514 | struct ieee80211_tx_stored_packet *store = | |
1515 | &local->pending_packet[control->queue]; | |
1516 | ||
1517 | if (ret == IEEE80211_TX_FRAG_AGAIN) | |
1518 | skb = NULL; | |
1519 | set_bit(IEEE80211_LINK_STATE_PENDING, | |
1520 | &local->state[control->queue]); | |
1521 | smp_mb(); | |
1522 | /* When the driver gets out of buffers during sending of | |
1523 | * fragments and calls ieee80211_stop_queue, there is | |
1524 | * a small window between IEEE80211_LINK_STATE_XOFF and | |
1525 | * IEEE80211_LINK_STATE_PENDING flags are set. If a buffer | |
1526 | * gets available in that window (i.e. driver calls | |
1527 | * ieee80211_wake_queue), we would end up with ieee80211_tx | |
1528 | * called with IEEE80211_LINK_STATE_PENDING. Prevent this by | |
1529 | * continuing transmitting here when that situation is | |
1530 | * possible to have happened. */ | |
1531 | if (!__ieee80211_queue_stopped(local, control->queue)) { | |
1532 | clear_bit(IEEE80211_LINK_STATE_PENDING, | |
1533 | &local->state[control->queue]); | |
1534 | goto retry; | |
1535 | } | |
1536 | memcpy(&store->control, control, | |
1537 | sizeof(struct ieee80211_tx_control)); | |
1538 | store->skb = skb; | |
1539 | store->extra_frag = tx.u.tx.extra_frag; | |
1540 | store->num_extra_frag = tx.u.tx.num_extra_frag; | |
1541 | store->last_frag_hwrate = tx.u.tx.last_frag_hwrate; | |
1542 | store->last_frag_rate = tx.u.tx.last_frag_rate; | |
1543 | store->last_frag_rate_ctrl_probe = tx.u.tx.probe_last_frag; | |
1544 | } | |
1545 | return 0; | |
1546 | ||
1547 | drop: | |
1548 | if (skb) | |
1549 | dev_kfree_skb(skb); | |
1550 | for (i = 0; i < tx.u.tx.num_extra_frag; i++) | |
1551 | if (tx.u.tx.extra_frag[i]) | |
1552 | dev_kfree_skb(tx.u.tx.extra_frag[i]); | |
1553 | kfree(tx.u.tx.extra_frag); | |
1554 | return 0; | |
1555 | } | |
1556 | ||
1557 | static void ieee80211_tx_pending(unsigned long data) | |
1558 | { | |
1559 | struct ieee80211_local *local = (struct ieee80211_local *)data; | |
1560 | struct net_device *dev = local->mdev; | |
1561 | struct ieee80211_tx_stored_packet *store; | |
1562 | struct ieee80211_txrx_data tx; | |
1563 | int i, ret, reschedule = 0; | |
1564 | ||
1565 | netif_tx_lock_bh(dev); | |
1566 | for (i = 0; i < local->hw.queues; i++) { | |
1567 | if (__ieee80211_queue_stopped(local, i)) | |
1568 | continue; | |
1569 | if (!__ieee80211_queue_pending(local, i)) { | |
1570 | reschedule = 1; | |
1571 | continue; | |
1572 | } | |
1573 | store = &local->pending_packet[i]; | |
1574 | tx.u.tx.control = &store->control; | |
1575 | tx.u.tx.extra_frag = store->extra_frag; | |
1576 | tx.u.tx.num_extra_frag = store->num_extra_frag; | |
1577 | tx.u.tx.last_frag_hwrate = store->last_frag_hwrate; | |
1578 | tx.u.tx.last_frag_rate = store->last_frag_rate; | |
1579 | tx.u.tx.probe_last_frag = store->last_frag_rate_ctrl_probe; | |
1580 | ret = __ieee80211_tx(local, store->skb, &tx); | |
1581 | if (ret) { | |
1582 | if (ret == IEEE80211_TX_FRAG_AGAIN) | |
1583 | store->skb = NULL; | |
1584 | } else { | |
1585 | clear_bit(IEEE80211_LINK_STATE_PENDING, | |
1586 | &local->state[i]); | |
1587 | reschedule = 1; | |
1588 | } | |
1589 | } | |
1590 | netif_tx_unlock_bh(dev); | |
1591 | if (reschedule) { | |
1592 | if (!ieee80211_qdisc_installed(dev)) { | |
1593 | if (!__ieee80211_queue_stopped(local, 0)) | |
1594 | netif_wake_queue(dev); | |
1595 | } else | |
1596 | netif_schedule(dev); | |
1597 | } | |
1598 | } | |
1599 | ||
1600 | static void ieee80211_clear_tx_pending(struct ieee80211_local *local) | |
1601 | { | |
1602 | int i, j; | |
1603 | struct ieee80211_tx_stored_packet *store; | |
1604 | ||
1605 | for (i = 0; i < local->hw.queues; i++) { | |
1606 | if (!__ieee80211_queue_pending(local, i)) | |
1607 | continue; | |
1608 | store = &local->pending_packet[i]; | |
1609 | kfree_skb(store->skb); | |
1610 | for (j = 0; j < store->num_extra_frag; j++) | |
1611 | kfree_skb(store->extra_frag[j]); | |
1612 | kfree(store->extra_frag); | |
1613 | clear_bit(IEEE80211_LINK_STATE_PENDING, &local->state[i]); | |
1614 | } | |
1615 | } | |
1616 | ||
1617 | static int ieee80211_master_start_xmit(struct sk_buff *skb, | |
1618 | struct net_device *dev) | |
1619 | { | |
1620 | struct ieee80211_tx_control control; | |
1621 | struct ieee80211_tx_packet_data *pkt_data; | |
1622 | struct net_device *odev = NULL; | |
1623 | struct ieee80211_sub_if_data *osdata; | |
1624 | int headroom; | |
1625 | int ret; | |
1626 | ||
1627 | /* | |
1628 | * copy control out of the skb so other people can use skb->cb | |
1629 | */ | |
1630 | pkt_data = (struct ieee80211_tx_packet_data *)skb->cb; | |
1631 | memset(&control, 0, sizeof(struct ieee80211_tx_control)); | |
1632 | ||
1633 | if (pkt_data->ifindex) | |
1634 | odev = dev_get_by_index(pkt_data->ifindex); | |
1635 | if (unlikely(odev && !is_ieee80211_device(odev, dev))) { | |
1636 | dev_put(odev); | |
1637 | odev = NULL; | |
1638 | } | |
1639 | if (unlikely(!odev)) { | |
1640 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
1641 | printk(KERN_DEBUG "%s: Discarded packet with nonexistent " | |
1642 | "originating device\n", dev->name); | |
1643 | #endif | |
1644 | dev_kfree_skb(skb); | |
1645 | return 0; | |
1646 | } | |
1647 | osdata = IEEE80211_DEV_TO_SUB_IF(odev); | |
1648 | ||
b306f453 | 1649 | headroom = osdata->local->tx_headroom + IEEE80211_ENCRYPT_HEADROOM; |
f0706e82 JB |
1650 | if (skb_headroom(skb) < headroom) { |
1651 | if (pskb_expand_head(skb, headroom, 0, GFP_ATOMIC)) { | |
1652 | dev_kfree_skb(skb); | |
1653 | return 0; | |
1654 | } | |
1655 | } | |
1656 | ||
1657 | control.ifindex = odev->ifindex; | |
1658 | control.type = osdata->type; | |
1659 | if (pkt_data->req_tx_status) | |
1660 | control.flags |= IEEE80211_TXCTL_REQ_TX_STATUS; | |
1661 | if (pkt_data->do_not_encrypt) | |
1662 | control.flags |= IEEE80211_TXCTL_DO_NOT_ENCRYPT; | |
1663 | if (pkt_data->requeue) | |
1664 | control.flags |= IEEE80211_TXCTL_REQUEUE; | |
1665 | control.queue = pkt_data->queue; | |
1666 | ||
1667 | ret = ieee80211_tx(odev, skb, &control, | |
1668 | control.type == IEEE80211_IF_TYPE_MGMT); | |
1669 | dev_put(odev); | |
1670 | ||
1671 | return ret; | |
1672 | } | |
1673 | ||
1674 | ||
40f7cac9 JB |
1675 | int ieee80211_monitor_start_xmit(struct sk_buff *skb, |
1676 | struct net_device *dev) | |
1677 | { | |
1678 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1679 | struct ieee80211_tx_packet_data *pkt_data; | |
1680 | struct ieee80211_radiotap_header *prthdr = | |
1681 | (struct ieee80211_radiotap_header *)skb->data; | |
1682 | u16 len; | |
1683 | ||
1684 | /* | |
1685 | * there must be a radiotap header at the | |
1686 | * start in this case | |
1687 | */ | |
1688 | if (unlikely(prthdr->it_version)) { | |
1689 | /* only version 0 is supported */ | |
1690 | dev_kfree_skb(skb); | |
1691 | return NETDEV_TX_OK; | |
1692 | } | |
1693 | ||
1694 | skb->dev = local->mdev; | |
1695 | ||
1696 | pkt_data = (struct ieee80211_tx_packet_data *)skb->cb; | |
1697 | memset(pkt_data, 0, sizeof(*pkt_data)); | |
1698 | pkt_data->ifindex = dev->ifindex; | |
1699 | pkt_data->mgmt_iface = 0; | |
1700 | pkt_data->do_not_encrypt = 1; | |
1701 | ||
1702 | /* above needed because we set skb device to master */ | |
1703 | ||
1704 | /* | |
1705 | * fix up the pointers accounting for the radiotap | |
1706 | * header still being in there. We are being given | |
1707 | * a precooked IEEE80211 header so no need for | |
1708 | * normal processing | |
1709 | */ | |
1710 | len = le16_to_cpu(get_unaligned(&prthdr->it_len)); | |
1711 | skb_set_mac_header(skb, len); | |
1712 | skb_set_network_header(skb, len + sizeof(struct ieee80211_hdr)); | |
1713 | skb_set_transport_header(skb, len + sizeof(struct ieee80211_hdr)); | |
1714 | ||
1715 | /* | |
1716 | * pass the radiotap header up to | |
1717 | * the next stage intact | |
1718 | */ | |
1719 | dev_queue_xmit(skb); | |
1720 | ||
1721 | return NETDEV_TX_OK; | |
1722 | } | |
1723 | ||
1724 | ||
f0706e82 JB |
1725 | /** |
1726 | * ieee80211_subif_start_xmit - netif start_xmit function for Ethernet-type | |
1727 | * subinterfaces (wlan#, WDS, and VLAN interfaces) | |
1728 | * @skb: packet to be sent | |
1729 | * @dev: incoming interface | |
1730 | * | |
1731 | * Returns: 0 on success (and frees skb in this case) or 1 on failure (skb will | |
1732 | * not be freed, and caller is responsible for either retrying later or freeing | |
1733 | * skb). | |
1734 | * | |
1735 | * This function takes in an Ethernet header and encapsulates it with suitable | |
1736 | * IEEE 802.11 header based on which interface the packet is coming in. The | |
1737 | * encapsulated packet will then be passed to master interface, wlan#.11, for | |
1738 | * transmission (through low-level driver). | |
1739 | */ | |
40f7cac9 JB |
1740 | int ieee80211_subif_start_xmit(struct sk_buff *skb, |
1741 | struct net_device *dev) | |
f0706e82 JB |
1742 | { |
1743 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1744 | struct ieee80211_tx_packet_data *pkt_data; | |
1745 | struct ieee80211_sub_if_data *sdata; | |
1746 | int ret = 1, head_need; | |
1747 | u16 ethertype, hdrlen, fc; | |
1748 | struct ieee80211_hdr hdr; | |
1749 | const u8 *encaps_data; | |
1750 | int encaps_len, skip_header_bytes; | |
1751 | int nh_pos, h_pos, no_encrypt = 0; | |
1752 | struct sta_info *sta; | |
1753 | ||
1754 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1755 | if (unlikely(skb->len < ETH_HLEN)) { | |
1756 | printk(KERN_DEBUG "%s: short skb (len=%d)\n", | |
1757 | dev->name, skb->len); | |
1758 | ret = 0; | |
1759 | goto fail; | |
1760 | } | |
1761 | ||
1762 | nh_pos = skb_network_header(skb) - skb->data; | |
1763 | h_pos = skb_transport_header(skb) - skb->data; | |
1764 | ||
1765 | /* convert Ethernet header to proper 802.11 header (based on | |
1766 | * operation mode) */ | |
1767 | ethertype = (skb->data[12] << 8) | skb->data[13]; | |
1768 | /* TODO: handling for 802.1x authorized/unauthorized port */ | |
1769 | fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA; | |
1770 | ||
1771 | if (likely(sdata->type == IEEE80211_IF_TYPE_AP || | |
1772 | sdata->type == IEEE80211_IF_TYPE_VLAN)) { | |
1773 | fc |= IEEE80211_FCTL_FROMDS; | |
1774 | /* DA BSSID SA */ | |
1775 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
1776 | memcpy(hdr.addr2, dev->dev_addr, ETH_ALEN); | |
1777 | memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN); | |
1778 | hdrlen = 24; | |
1779 | } else if (sdata->type == IEEE80211_IF_TYPE_WDS) { | |
1780 | fc |= IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS; | |
1781 | /* RA TA DA SA */ | |
1782 | memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN); | |
1783 | memcpy(hdr.addr2, dev->dev_addr, ETH_ALEN); | |
1784 | memcpy(hdr.addr3, skb->data, ETH_ALEN); | |
1785 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
1786 | hdrlen = 30; | |
1787 | } else if (sdata->type == IEEE80211_IF_TYPE_STA) { | |
1788 | fc |= IEEE80211_FCTL_TODS; | |
1789 | /* BSSID SA DA */ | |
1790 | memcpy(hdr.addr1, sdata->u.sta.bssid, ETH_ALEN); | |
1791 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
1792 | memcpy(hdr.addr3, skb->data, ETH_ALEN); | |
1793 | hdrlen = 24; | |
1794 | } else if (sdata->type == IEEE80211_IF_TYPE_IBSS) { | |
1795 | /* DA SA BSSID */ | |
1796 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
1797 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
1798 | memcpy(hdr.addr3, sdata->u.sta.bssid, ETH_ALEN); | |
1799 | hdrlen = 24; | |
1800 | } else { | |
1801 | ret = 0; | |
1802 | goto fail; | |
1803 | } | |
1804 | ||
1805 | /* receiver is QoS enabled, use a QoS type frame */ | |
1806 | sta = sta_info_get(local, hdr.addr1); | |
1807 | if (sta) { | |
1808 | if (sta->flags & WLAN_STA_WME) { | |
1809 | fc |= IEEE80211_STYPE_QOS_DATA; | |
1810 | hdrlen += 2; | |
1811 | } | |
1812 | sta_info_put(sta); | |
1813 | } | |
1814 | ||
1815 | hdr.frame_control = cpu_to_le16(fc); | |
1816 | hdr.duration_id = 0; | |
1817 | hdr.seq_ctrl = 0; | |
1818 | ||
1819 | skip_header_bytes = ETH_HLEN; | |
1820 | if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) { | |
1821 | encaps_data = bridge_tunnel_header; | |
1822 | encaps_len = sizeof(bridge_tunnel_header); | |
1823 | skip_header_bytes -= 2; | |
1824 | } else if (ethertype >= 0x600) { | |
1825 | encaps_data = rfc1042_header; | |
1826 | encaps_len = sizeof(rfc1042_header); | |
1827 | skip_header_bytes -= 2; | |
1828 | } else { | |
1829 | encaps_data = NULL; | |
1830 | encaps_len = 0; | |
1831 | } | |
1832 | ||
1833 | skb_pull(skb, skip_header_bytes); | |
1834 | nh_pos -= skip_header_bytes; | |
1835 | h_pos -= skip_header_bytes; | |
1836 | ||
1837 | /* TODO: implement support for fragments so that there is no need to | |
1838 | * reallocate and copy payload; it might be enough to support one | |
1839 | * extra fragment that would be copied in the beginning of the frame | |
1840 | * data.. anyway, it would be nice to include this into skb structure | |
1841 | * somehow | |
1842 | * | |
1843 | * There are few options for this: | |
1844 | * use skb->cb as an extra space for 802.11 header | |
1845 | * allocate new buffer if not enough headroom | |
1846 | * make sure that there is enough headroom in every skb by increasing | |
1847 | * build in headroom in __dev_alloc_skb() (linux/skbuff.h) and | |
1848 | * alloc_skb() (net/core/skbuff.c) | |
1849 | */ | |
b306f453 | 1850 | head_need = hdrlen + encaps_len + local->tx_headroom; |
f0706e82 JB |
1851 | head_need -= skb_headroom(skb); |
1852 | ||
1853 | /* We are going to modify skb data, so make a copy of it if happens to | |
1854 | * be cloned. This could happen, e.g., with Linux bridge code passing | |
1855 | * us broadcast frames. */ | |
1856 | ||
1857 | if (head_need > 0 || skb_cloned(skb)) { | |
1858 | #if 0 | |
1859 | printk(KERN_DEBUG "%s: need to reallocate buffer for %d bytes " | |
1860 | "of headroom\n", dev->name, head_need); | |
1861 | #endif | |
1862 | ||
1863 | if (skb_cloned(skb)) | |
1864 | I802_DEBUG_INC(local->tx_expand_skb_head_cloned); | |
1865 | else | |
1866 | I802_DEBUG_INC(local->tx_expand_skb_head); | |
1867 | /* Since we have to reallocate the buffer, make sure that there | |
1868 | * is enough room for possible WEP IV/ICV and TKIP (8 bytes | |
1869 | * before payload and 12 after). */ | |
1870 | if (pskb_expand_head(skb, (head_need > 0 ? head_need + 8 : 8), | |
1871 | 12, GFP_ATOMIC)) { | |
1872 | printk(KERN_DEBUG "%s: failed to reallocate TX buffer" | |
1873 | "\n", dev->name); | |
1874 | goto fail; | |
1875 | } | |
1876 | } | |
1877 | ||
1878 | if (encaps_data) { | |
1879 | memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len); | |
1880 | nh_pos += encaps_len; | |
1881 | h_pos += encaps_len; | |
1882 | } | |
1883 | memcpy(skb_push(skb, hdrlen), &hdr, hdrlen); | |
1884 | nh_pos += hdrlen; | |
1885 | h_pos += hdrlen; | |
1886 | ||
1887 | pkt_data = (struct ieee80211_tx_packet_data *)skb->cb; | |
1888 | memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data)); | |
40f7cac9 | 1889 | pkt_data->ifindex = dev->ifindex; |
f0706e82 JB |
1890 | pkt_data->mgmt_iface = (sdata->type == IEEE80211_IF_TYPE_MGMT); |
1891 | pkt_data->do_not_encrypt = no_encrypt; | |
1892 | ||
1893 | skb->dev = local->mdev; | |
1894 | sdata->stats.tx_packets++; | |
1895 | sdata->stats.tx_bytes += skb->len; | |
1896 | ||
1897 | /* Update skb pointers to various headers since this modified frame | |
1898 | * is going to go through Linux networking code that may potentially | |
1899 | * need things like pointer to IP header. */ | |
1900 | skb_set_mac_header(skb, 0); | |
1901 | skb_set_network_header(skb, nh_pos); | |
1902 | skb_set_transport_header(skb, h_pos); | |
1903 | ||
1904 | dev->trans_start = jiffies; | |
1905 | dev_queue_xmit(skb); | |
1906 | ||
1907 | return 0; | |
1908 | ||
1909 | fail: | |
1910 | if (!ret) | |
1911 | dev_kfree_skb(skb); | |
1912 | ||
1913 | return ret; | |
1914 | } | |
1915 | ||
1916 | ||
1917 | /* | |
1918 | * This is the transmit routine for the 802.11 type interfaces | |
1919 | * called by upper layers of the linux networking | |
1920 | * stack when it has a frame to transmit | |
1921 | */ | |
1922 | static int | |
1923 | ieee80211_mgmt_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
1924 | { | |
1925 | struct ieee80211_sub_if_data *sdata; | |
1926 | struct ieee80211_tx_packet_data *pkt_data; | |
1927 | struct ieee80211_hdr *hdr; | |
1928 | u16 fc; | |
1929 | ||
1930 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1931 | ||
1932 | if (skb->len < 10) { | |
1933 | dev_kfree_skb(skb); | |
1934 | return 0; | |
1935 | } | |
1936 | ||
b306f453 JB |
1937 | if (skb_headroom(skb) < sdata->local->tx_headroom) { |
1938 | if (pskb_expand_head(skb, sdata->local->tx_headroom, | |
1939 | 0, GFP_ATOMIC)) { | |
f0706e82 JB |
1940 | dev_kfree_skb(skb); |
1941 | return 0; | |
1942 | } | |
1943 | } | |
1944 | ||
1945 | hdr = (struct ieee80211_hdr *) skb->data; | |
1946 | fc = le16_to_cpu(hdr->frame_control); | |
1947 | ||
1948 | pkt_data = (struct ieee80211_tx_packet_data *) skb->cb; | |
1949 | memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data)); | |
1950 | pkt_data->ifindex = sdata->dev->ifindex; | |
1951 | pkt_data->mgmt_iface = (sdata->type == IEEE80211_IF_TYPE_MGMT); | |
1952 | ||
1953 | skb->priority = 20; /* use hardcoded priority for mgmt TX queue */ | |
1954 | skb->dev = sdata->local->mdev; | |
1955 | ||
1956 | /* | |
1957 | * We're using the protocol field of the the frame control header | |
1958 | * to request TX callback for hostapd. BIT(1) is checked. | |
1959 | */ | |
1960 | if ((fc & BIT(1)) == BIT(1)) { | |
1961 | pkt_data->req_tx_status = 1; | |
1962 | fc &= ~BIT(1); | |
1963 | hdr->frame_control = cpu_to_le16(fc); | |
1964 | } | |
1965 | ||
1966 | pkt_data->do_not_encrypt = !(fc & IEEE80211_FCTL_PROTECTED); | |
1967 | ||
1968 | sdata->stats.tx_packets++; | |
1969 | sdata->stats.tx_bytes += skb->len; | |
1970 | ||
1971 | dev_queue_xmit(skb); | |
1972 | ||
1973 | return 0; | |
1974 | } | |
1975 | ||
1976 | ||
1977 | static void ieee80211_beacon_add_tim(struct ieee80211_local *local, | |
1978 | struct ieee80211_if_ap *bss, | |
1979 | struct sk_buff *skb) | |
1980 | { | |
1981 | u8 *pos, *tim; | |
1982 | int aid0 = 0; | |
1983 | int i, have_bits = 0, n1, n2; | |
1984 | ||
1985 | /* Generate bitmap for TIM only if there are any STAs in power save | |
1986 | * mode. */ | |
1987 | spin_lock_bh(&local->sta_lock); | |
1988 | if (atomic_read(&bss->num_sta_ps) > 0) | |
1989 | /* in the hope that this is faster than | |
1990 | * checking byte-for-byte */ | |
1991 | have_bits = !bitmap_empty((unsigned long*)bss->tim, | |
1992 | IEEE80211_MAX_AID+1); | |
1993 | ||
1994 | if (bss->dtim_count == 0) | |
1995 | bss->dtim_count = bss->dtim_period - 1; | |
1996 | else | |
1997 | bss->dtim_count--; | |
1998 | ||
1999 | tim = pos = (u8 *) skb_put(skb, 6); | |
2000 | *pos++ = WLAN_EID_TIM; | |
2001 | *pos++ = 4; | |
2002 | *pos++ = bss->dtim_count; | |
2003 | *pos++ = bss->dtim_period; | |
2004 | ||
2005 | if (bss->dtim_count == 0 && !skb_queue_empty(&bss->ps_bc_buf)) | |
2006 | aid0 = 1; | |
2007 | ||
2008 | if (have_bits) { | |
2009 | /* Find largest even number N1 so that bits numbered 1 through | |
2010 | * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits | |
2011 | * (N2 + 1) x 8 through 2007 are 0. */ | |
2012 | n1 = 0; | |
2013 | for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) { | |
2014 | if (bss->tim[i]) { | |
2015 | n1 = i & 0xfe; | |
2016 | break; | |
2017 | } | |
2018 | } | |
2019 | n2 = n1; | |
2020 | for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) { | |
2021 | if (bss->tim[i]) { | |
2022 | n2 = i; | |
2023 | break; | |
2024 | } | |
2025 | } | |
2026 | ||
2027 | /* Bitmap control */ | |
2028 | *pos++ = n1 | aid0; | |
2029 | /* Part Virt Bitmap */ | |
2030 | memcpy(pos, bss->tim + n1, n2 - n1 + 1); | |
2031 | ||
2032 | tim[1] = n2 - n1 + 4; | |
2033 | skb_put(skb, n2 - n1); | |
2034 | } else { | |
2035 | *pos++ = aid0; /* Bitmap control */ | |
2036 | *pos++ = 0; /* Part Virt Bitmap */ | |
2037 | } | |
2038 | spin_unlock_bh(&local->sta_lock); | |
2039 | } | |
2040 | ||
2041 | ||
2042 | struct sk_buff * ieee80211_beacon_get(struct ieee80211_hw *hw, int if_id, | |
2043 | struct ieee80211_tx_control *control) | |
2044 | { | |
2045 | struct ieee80211_local *local = hw_to_local(hw); | |
2046 | struct sk_buff *skb; | |
2047 | struct net_device *bdev; | |
2048 | struct ieee80211_sub_if_data *sdata = NULL; | |
2049 | struct ieee80211_if_ap *ap = NULL; | |
2050 | struct ieee80211_rate *rate; | |
2051 | struct rate_control_extra extra; | |
2052 | u8 *b_head, *b_tail; | |
2053 | int bh_len, bt_len; | |
2054 | ||
2055 | bdev = dev_get_by_index(if_id); | |
2056 | if (bdev) { | |
2057 | sdata = IEEE80211_DEV_TO_SUB_IF(bdev); | |
2058 | ap = &sdata->u.ap; | |
2059 | dev_put(bdev); | |
2060 | } | |
2061 | ||
2062 | if (!ap || sdata->type != IEEE80211_IF_TYPE_AP || | |
2063 | !ap->beacon_head) { | |
2064 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
2065 | if (net_ratelimit()) | |
2066 | printk(KERN_DEBUG "no beacon data avail for idx=%d " | |
2067 | "(%s)\n", if_id, bdev ? bdev->name : "N/A"); | |
2068 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ | |
2069 | return NULL; | |
2070 | } | |
2071 | ||
2072 | /* Assume we are generating the normal beacon locally */ | |
2073 | b_head = ap->beacon_head; | |
2074 | b_tail = ap->beacon_tail; | |
2075 | bh_len = ap->beacon_head_len; | |
2076 | bt_len = ap->beacon_tail_len; | |
2077 | ||
b306f453 | 2078 | skb = dev_alloc_skb(local->tx_headroom + |
f0706e82 JB |
2079 | bh_len + bt_len + 256 /* maximum TIM len */); |
2080 | if (!skb) | |
2081 | return NULL; | |
2082 | ||
b306f453 | 2083 | skb_reserve(skb, local->tx_headroom); |
f0706e82 JB |
2084 | memcpy(skb_put(skb, bh_len), b_head, bh_len); |
2085 | ||
2086 | ieee80211_include_sequence(sdata, (struct ieee80211_hdr *)skb->data); | |
2087 | ||
2088 | ieee80211_beacon_add_tim(local, ap, skb); | |
2089 | ||
2090 | if (b_tail) { | |
2091 | memcpy(skb_put(skb, bt_len), b_tail, bt_len); | |
2092 | } | |
2093 | ||
2094 | if (control) { | |
2095 | memset(&extra, 0, sizeof(extra)); | |
2096 | extra.mode = local->oper_hw_mode; | |
2097 | ||
2098 | rate = rate_control_get_rate(local, local->mdev, skb, &extra); | |
2099 | if (!rate) { | |
2100 | if (net_ratelimit()) { | |
2101 | printk(KERN_DEBUG "%s: ieee80211_beacon_get: no rate " | |
2102 | "found\n", local->mdev->name); | |
2103 | } | |
2104 | dev_kfree_skb(skb); | |
2105 | return NULL; | |
2106 | } | |
2107 | ||
2108 | control->tx_rate = (local->short_preamble && | |
2109 | (rate->flags & IEEE80211_RATE_PREAMBLE2)) ? | |
2110 | rate->val2 : rate->val; | |
2111 | control->antenna_sel_tx = local->hw.conf.antenna_sel_tx; | |
2112 | control->power_level = local->hw.conf.power_level; | |
2113 | control->flags |= IEEE80211_TXCTL_NO_ACK; | |
2114 | control->retry_limit = 1; | |
2115 | control->flags |= IEEE80211_TXCTL_CLEAR_DST_MASK; | |
2116 | } | |
2117 | ||
2118 | ap->num_beacons++; | |
2119 | return skb; | |
2120 | } | |
2121 | EXPORT_SYMBOL(ieee80211_beacon_get); | |
2122 | ||
2123 | __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, | |
2124 | size_t frame_len, | |
2125 | const struct ieee80211_tx_control *frame_txctl) | |
2126 | { | |
2127 | struct ieee80211_local *local = hw_to_local(hw); | |
2128 | struct ieee80211_rate *rate; | |
2129 | int short_preamble = local->short_preamble; | |
2130 | int erp; | |
2131 | u16 dur; | |
2132 | ||
2133 | rate = frame_txctl->rts_rate; | |
2134 | erp = !!(rate->flags & IEEE80211_RATE_ERP); | |
2135 | ||
2136 | /* CTS duration */ | |
2137 | dur = ieee80211_frame_duration(local, 10, rate->rate, | |
2138 | erp, short_preamble); | |
2139 | /* Data frame duration */ | |
2140 | dur += ieee80211_frame_duration(local, frame_len, rate->rate, | |
2141 | erp, short_preamble); | |
2142 | /* ACK duration */ | |
2143 | dur += ieee80211_frame_duration(local, 10, rate->rate, | |
2144 | erp, short_preamble); | |
2145 | ||
2146 | return cpu_to_le16(dur); | |
2147 | } | |
2148 | EXPORT_SYMBOL(ieee80211_rts_duration); | |
2149 | ||
2150 | ||
2151 | __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, | |
2152 | size_t frame_len, | |
2153 | const struct ieee80211_tx_control *frame_txctl) | |
2154 | { | |
2155 | struct ieee80211_local *local = hw_to_local(hw); | |
2156 | struct ieee80211_rate *rate; | |
2157 | int short_preamble = local->short_preamble; | |
2158 | int erp; | |
2159 | u16 dur; | |
2160 | ||
2161 | rate = frame_txctl->rts_rate; | |
2162 | erp = !!(rate->flags & IEEE80211_RATE_ERP); | |
2163 | ||
2164 | /* Data frame duration */ | |
2165 | dur = ieee80211_frame_duration(local, frame_len, rate->rate, | |
2166 | erp, short_preamble); | |
2167 | if (!(frame_txctl->flags & IEEE80211_TXCTL_NO_ACK)) { | |
2168 | /* ACK duration */ | |
2169 | dur += ieee80211_frame_duration(local, 10, rate->rate, | |
2170 | erp, short_preamble); | |
2171 | } | |
2172 | ||
2173 | return cpu_to_le16(dur); | |
2174 | } | |
2175 | EXPORT_SYMBOL(ieee80211_ctstoself_duration); | |
2176 | ||
2177 | void ieee80211_rts_get(struct ieee80211_hw *hw, | |
2178 | const void *frame, size_t frame_len, | |
2179 | const struct ieee80211_tx_control *frame_txctl, | |
2180 | struct ieee80211_rts *rts) | |
2181 | { | |
2182 | const struct ieee80211_hdr *hdr = frame; | |
2183 | u16 fctl; | |
2184 | ||
2185 | fctl = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS; | |
2186 | rts->frame_control = cpu_to_le16(fctl); | |
2187 | rts->duration = ieee80211_rts_duration(hw, frame_len, frame_txctl); | |
2188 | memcpy(rts->ra, hdr->addr1, sizeof(rts->ra)); | |
2189 | memcpy(rts->ta, hdr->addr2, sizeof(rts->ta)); | |
2190 | } | |
2191 | EXPORT_SYMBOL(ieee80211_rts_get); | |
2192 | ||
2193 | void ieee80211_ctstoself_get(struct ieee80211_hw *hw, | |
2194 | const void *frame, size_t frame_len, | |
2195 | const struct ieee80211_tx_control *frame_txctl, | |
2196 | struct ieee80211_cts *cts) | |
2197 | { | |
2198 | const struct ieee80211_hdr *hdr = frame; | |
2199 | u16 fctl; | |
2200 | ||
2201 | fctl = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS; | |
2202 | cts->frame_control = cpu_to_le16(fctl); | |
2203 | cts->duration = ieee80211_ctstoself_duration(hw, frame_len, frame_txctl); | |
2204 | memcpy(cts->ra, hdr->addr1, sizeof(cts->ra)); | |
2205 | } | |
2206 | EXPORT_SYMBOL(ieee80211_ctstoself_get); | |
2207 | ||
2208 | struct sk_buff * | |
2209 | ieee80211_get_buffered_bc(struct ieee80211_hw *hw, int if_id, | |
2210 | struct ieee80211_tx_control *control) | |
2211 | { | |
2212 | struct ieee80211_local *local = hw_to_local(hw); | |
2213 | struct sk_buff *skb; | |
2214 | struct sta_info *sta; | |
2215 | ieee80211_tx_handler *handler; | |
2216 | struct ieee80211_txrx_data tx; | |
2217 | ieee80211_txrx_result res = TXRX_DROP; | |
2218 | struct net_device *bdev; | |
2219 | struct ieee80211_sub_if_data *sdata; | |
2220 | struct ieee80211_if_ap *bss = NULL; | |
2221 | ||
2222 | bdev = dev_get_by_index(if_id); | |
2223 | if (bdev) { | |
2224 | sdata = IEEE80211_DEV_TO_SUB_IF(bdev); | |
2225 | bss = &sdata->u.ap; | |
2226 | dev_put(bdev); | |
2227 | } | |
2228 | if (!bss || sdata->type != IEEE80211_IF_TYPE_AP || !bss->beacon_head) | |
2229 | return NULL; | |
2230 | ||
2231 | if (bss->dtim_count != 0) | |
2232 | return NULL; /* send buffered bc/mc only after DTIM beacon */ | |
2233 | memset(control, 0, sizeof(*control)); | |
2234 | while (1) { | |
2235 | skb = skb_dequeue(&bss->ps_bc_buf); | |
2236 | if (!skb) | |
2237 | return NULL; | |
2238 | local->total_ps_buffered--; | |
2239 | ||
2240 | if (!skb_queue_empty(&bss->ps_bc_buf) && skb->len >= 2) { | |
2241 | struct ieee80211_hdr *hdr = | |
2242 | (struct ieee80211_hdr *) skb->data; | |
2243 | /* more buffered multicast/broadcast frames ==> set | |
2244 | * MoreData flag in IEEE 802.11 header to inform PS | |
2245 | * STAs */ | |
2246 | hdr->frame_control |= | |
2247 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
2248 | } | |
2249 | ||
2250 | if (ieee80211_tx_prepare(&tx, skb, local->mdev, control) == 0) | |
2251 | break; | |
2252 | dev_kfree_skb_any(skb); | |
2253 | } | |
2254 | sta = tx.sta; | |
2255 | tx.u.tx.ps_buffered = 1; | |
2256 | ||
2257 | for (handler = local->tx_handlers; *handler != NULL; handler++) { | |
2258 | res = (*handler)(&tx); | |
2259 | if (res == TXRX_DROP || res == TXRX_QUEUED) | |
2260 | break; | |
2261 | } | |
2262 | dev_put(tx.dev); | |
2263 | skb = tx.skb; /* handlers are allowed to change skb */ | |
2264 | ||
2265 | if (res == TXRX_DROP) { | |
2266 | I802_DEBUG_INC(local->tx_handlers_drop); | |
2267 | dev_kfree_skb(skb); | |
2268 | skb = NULL; | |
2269 | } else if (res == TXRX_QUEUED) { | |
2270 | I802_DEBUG_INC(local->tx_handlers_queued); | |
2271 | skb = NULL; | |
2272 | } | |
2273 | ||
2274 | if (sta) | |
2275 | sta_info_put(sta); | |
2276 | ||
2277 | return skb; | |
2278 | } | |
2279 | EXPORT_SYMBOL(ieee80211_get_buffered_bc); | |
2280 | ||
2281 | static int __ieee80211_if_config(struct net_device *dev, | |
2282 | struct sk_buff *beacon, | |
2283 | struct ieee80211_tx_control *control) | |
2284 | { | |
2285 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2286 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2287 | struct ieee80211_if_conf conf; | |
2288 | static u8 scan_bssid[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; | |
2289 | ||
2290 | if (!local->ops->config_interface || !netif_running(dev)) | |
2291 | return 0; | |
2292 | ||
2293 | memset(&conf, 0, sizeof(conf)); | |
2294 | conf.type = sdata->type; | |
2295 | if (sdata->type == IEEE80211_IF_TYPE_STA || | |
2296 | sdata->type == IEEE80211_IF_TYPE_IBSS) { | |
2297 | if (local->sta_scanning && | |
2298 | local->scan_dev == dev) | |
2299 | conf.bssid = scan_bssid; | |
2300 | else | |
2301 | conf.bssid = sdata->u.sta.bssid; | |
2302 | conf.ssid = sdata->u.sta.ssid; | |
2303 | conf.ssid_len = sdata->u.sta.ssid_len; | |
2304 | conf.generic_elem = sdata->u.sta.extra_ie; | |
2305 | conf.generic_elem_len = sdata->u.sta.extra_ie_len; | |
2306 | } else if (sdata->type == IEEE80211_IF_TYPE_AP) { | |
2307 | conf.ssid = sdata->u.ap.ssid; | |
2308 | conf.ssid_len = sdata->u.ap.ssid_len; | |
2309 | conf.generic_elem = sdata->u.ap.generic_elem; | |
2310 | conf.generic_elem_len = sdata->u.ap.generic_elem_len; | |
2311 | conf.beacon = beacon; | |
2312 | conf.beacon_control = control; | |
2313 | } | |
2314 | return local->ops->config_interface(local_to_hw(local), | |
2315 | dev->ifindex, &conf); | |
2316 | } | |
2317 | ||
2318 | int ieee80211_if_config(struct net_device *dev) | |
2319 | { | |
2320 | return __ieee80211_if_config(dev, NULL, NULL); | |
2321 | } | |
2322 | ||
2323 | int ieee80211_if_config_beacon(struct net_device *dev) | |
2324 | { | |
2325 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2326 | struct ieee80211_tx_control control; | |
2327 | struct sk_buff *skb; | |
2328 | ||
2329 | if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE)) | |
2330 | return 0; | |
2331 | skb = ieee80211_beacon_get(local_to_hw(local), dev->ifindex, &control); | |
2332 | if (!skb) | |
2333 | return -ENOMEM; | |
2334 | return __ieee80211_if_config(dev, skb, &control); | |
2335 | } | |
2336 | ||
2337 | int ieee80211_hw_config(struct ieee80211_local *local) | |
2338 | { | |
2339 | struct ieee80211_hw_mode *mode; | |
2340 | struct ieee80211_channel *chan; | |
2341 | int ret = 0; | |
2342 | ||
2343 | if (local->sta_scanning) { | |
2344 | chan = local->scan_channel; | |
2345 | mode = local->scan_hw_mode; | |
2346 | } else { | |
2347 | chan = local->oper_channel; | |
2348 | mode = local->oper_hw_mode; | |
2349 | } | |
2350 | ||
2351 | local->hw.conf.channel = chan->chan; | |
2352 | local->hw.conf.channel_val = chan->val; | |
2353 | local->hw.conf.power_level = chan->power_level; | |
2354 | local->hw.conf.freq = chan->freq; | |
2355 | local->hw.conf.phymode = mode->mode; | |
2356 | local->hw.conf.antenna_max = chan->antenna_max; | |
2357 | local->hw.conf.chan = chan; | |
2358 | local->hw.conf.mode = mode; | |
2359 | ||
2360 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
2361 | printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d " | |
2362 | "phymode=%d\n", local->hw.conf.channel, local->hw.conf.freq, | |
2363 | local->hw.conf.phymode); | |
2364 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ | |
2365 | ||
2366 | if (local->ops->config) | |
2367 | ret = local->ops->config(local_to_hw(local), &local->hw.conf); | |
2368 | ||
2369 | return ret; | |
2370 | } | |
2371 | ||
2372 | ||
2373 | static int ieee80211_change_mtu(struct net_device *dev, int new_mtu) | |
2374 | { | |
2375 | /* FIX: what would be proper limits for MTU? | |
2376 | * This interface uses 802.3 frames. */ | |
2377 | if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6) { | |
2378 | printk(KERN_WARNING "%s: invalid MTU %d\n", | |
2379 | dev->name, new_mtu); | |
2380 | return -EINVAL; | |
2381 | } | |
2382 | ||
2383 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
2384 | printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu); | |
2385 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ | |
2386 | dev->mtu = new_mtu; | |
2387 | return 0; | |
2388 | } | |
2389 | ||
2390 | ||
2391 | static int ieee80211_change_mtu_apdev(struct net_device *dev, int new_mtu) | |
2392 | { | |
2393 | /* FIX: what would be proper limits for MTU? | |
2394 | * This interface uses 802.11 frames. */ | |
2395 | if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN) { | |
2396 | printk(KERN_WARNING "%s: invalid MTU %d\n", | |
2397 | dev->name, new_mtu); | |
2398 | return -EINVAL; | |
2399 | } | |
2400 | ||
2401 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
2402 | printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu); | |
2403 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ | |
2404 | dev->mtu = new_mtu; | |
2405 | return 0; | |
2406 | } | |
2407 | ||
2408 | enum netif_tx_lock_class { | |
2409 | TX_LOCK_NORMAL, | |
2410 | TX_LOCK_MASTER, | |
2411 | }; | |
2412 | ||
2413 | static inline void netif_tx_lock_nested(struct net_device *dev, int subclass) | |
2414 | { | |
2415 | spin_lock_nested(&dev->_xmit_lock, subclass); | |
2416 | dev->xmit_lock_owner = smp_processor_id(); | |
2417 | } | |
2418 | ||
2419 | static void ieee80211_set_multicast_list(struct net_device *dev) | |
2420 | { | |
2421 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2422 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2423 | unsigned short flags; | |
2424 | ||
2425 | netif_tx_lock_nested(local->mdev, TX_LOCK_MASTER); | |
2426 | if (((dev->flags & IFF_ALLMULTI) != 0) ^ (sdata->allmulti != 0)) { | |
2427 | if (sdata->allmulti) { | |
2428 | sdata->allmulti = 0; | |
2429 | local->iff_allmultis--; | |
2430 | } else { | |
2431 | sdata->allmulti = 1; | |
2432 | local->iff_allmultis++; | |
2433 | } | |
2434 | } | |
2435 | if (((dev->flags & IFF_PROMISC) != 0) ^ (sdata->promisc != 0)) { | |
2436 | if (sdata->promisc) { | |
2437 | sdata->promisc = 0; | |
2438 | local->iff_promiscs--; | |
2439 | } else { | |
2440 | sdata->promisc = 1; | |
2441 | local->iff_promiscs++; | |
2442 | } | |
2443 | } | |
2444 | if (dev->mc_count != sdata->mc_count) { | |
2445 | local->mc_count = local->mc_count - sdata->mc_count + | |
2446 | dev->mc_count; | |
2447 | sdata->mc_count = dev->mc_count; | |
2448 | } | |
2449 | if (local->ops->set_multicast_list) { | |
2450 | flags = local->mdev->flags; | |
2451 | if (local->iff_allmultis) | |
2452 | flags |= IFF_ALLMULTI; | |
2453 | if (local->iff_promiscs) | |
2454 | flags |= IFF_PROMISC; | |
2455 | read_lock(&local->sub_if_lock); | |
2456 | local->ops->set_multicast_list(local_to_hw(local), flags, | |
2457 | local->mc_count); | |
2458 | read_unlock(&local->sub_if_lock); | |
2459 | } | |
2460 | netif_tx_unlock(local->mdev); | |
2461 | } | |
2462 | ||
2463 | struct dev_mc_list *ieee80211_get_mc_list_item(struct ieee80211_hw *hw, | |
2464 | struct dev_mc_list *prev, | |
2465 | void **ptr) | |
2466 | { | |
2467 | struct ieee80211_local *local = hw_to_local(hw); | |
2468 | struct ieee80211_sub_if_data *sdata = *ptr; | |
2469 | struct dev_mc_list *mc; | |
2470 | ||
2471 | if (!prev) { | |
2472 | WARN_ON(sdata); | |
2473 | sdata = NULL; | |
2474 | } | |
2475 | if (!prev || !prev->next) { | |
2476 | if (sdata) | |
2477 | sdata = list_entry(sdata->list.next, | |
2478 | struct ieee80211_sub_if_data, list); | |
2479 | else | |
2480 | sdata = list_entry(local->sub_if_list.next, | |
2481 | struct ieee80211_sub_if_data, list); | |
2482 | if (&sdata->list != &local->sub_if_list) | |
2483 | mc = sdata->dev->mc_list; | |
2484 | else | |
2485 | mc = NULL; | |
2486 | } else | |
2487 | mc = prev->next; | |
2488 | ||
2489 | *ptr = sdata; | |
2490 | return mc; | |
2491 | } | |
2492 | EXPORT_SYMBOL(ieee80211_get_mc_list_item); | |
2493 | ||
2494 | static struct net_device_stats *ieee80211_get_stats(struct net_device *dev) | |
2495 | { | |
2496 | struct ieee80211_sub_if_data *sdata; | |
2497 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2498 | return &(sdata->stats); | |
2499 | } | |
2500 | ||
2501 | static void ieee80211_if_shutdown(struct net_device *dev) | |
2502 | { | |
2503 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2504 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2505 | ||
2506 | ASSERT_RTNL(); | |
2507 | switch (sdata->type) { | |
2508 | case IEEE80211_IF_TYPE_STA: | |
2509 | case IEEE80211_IF_TYPE_IBSS: | |
2510 | sdata->u.sta.state = IEEE80211_DISABLED; | |
2511 | del_timer_sync(&sdata->u.sta.timer); | |
2512 | skb_queue_purge(&sdata->u.sta.skb_queue); | |
2513 | if (!local->ops->hw_scan && | |
2514 | local->scan_dev == sdata->dev) { | |
2515 | local->sta_scanning = 0; | |
2516 | cancel_delayed_work(&local->scan_work); | |
2517 | } | |
2518 | flush_workqueue(local->hw.workqueue); | |
2519 | break; | |
2520 | } | |
2521 | } | |
2522 | ||
2523 | static inline int identical_mac_addr_allowed(int type1, int type2) | |
2524 | { | |
2525 | return (type1 == IEEE80211_IF_TYPE_MNTR || | |
2526 | type2 == IEEE80211_IF_TYPE_MNTR || | |
2527 | (type1 == IEEE80211_IF_TYPE_AP && | |
2528 | type2 == IEEE80211_IF_TYPE_WDS) || | |
2529 | (type1 == IEEE80211_IF_TYPE_WDS && | |
2530 | (type2 == IEEE80211_IF_TYPE_WDS || | |
2531 | type2 == IEEE80211_IF_TYPE_AP)) || | |
2532 | (type1 == IEEE80211_IF_TYPE_AP && | |
2533 | type2 == IEEE80211_IF_TYPE_VLAN) || | |
2534 | (type1 == IEEE80211_IF_TYPE_VLAN && | |
2535 | (type2 == IEEE80211_IF_TYPE_AP || | |
2536 | type2 == IEEE80211_IF_TYPE_VLAN))); | |
2537 | } | |
2538 | ||
2539 | static int ieee80211_master_open(struct net_device *dev) | |
2540 | { | |
2541 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2542 | struct ieee80211_sub_if_data *sdata; | |
2543 | int res = -EOPNOTSUPP; | |
2544 | ||
2545 | read_lock(&local->sub_if_lock); | |
2546 | list_for_each_entry(sdata, &local->sub_if_list, list) { | |
2547 | if (sdata->dev != dev && netif_running(sdata->dev)) { | |
2548 | res = 0; | |
2549 | break; | |
2550 | } | |
2551 | } | |
2552 | read_unlock(&local->sub_if_lock); | |
2553 | return res; | |
2554 | } | |
2555 | ||
2556 | static int ieee80211_master_stop(struct net_device *dev) | |
2557 | { | |
2558 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2559 | struct ieee80211_sub_if_data *sdata; | |
2560 | ||
2561 | read_lock(&local->sub_if_lock); | |
2562 | list_for_each_entry(sdata, &local->sub_if_list, list) | |
2563 | if (sdata->dev != dev && netif_running(sdata->dev)) | |
2564 | dev_close(sdata->dev); | |
2565 | read_unlock(&local->sub_if_lock); | |
2566 | ||
2567 | return 0; | |
2568 | } | |
2569 | ||
2570 | static int ieee80211_mgmt_open(struct net_device *dev) | |
2571 | { | |
2572 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2573 | ||
2574 | if (!netif_running(local->mdev)) | |
2575 | return -EOPNOTSUPP; | |
2576 | return 0; | |
2577 | } | |
2578 | ||
2579 | static int ieee80211_mgmt_stop(struct net_device *dev) | |
2580 | { | |
2581 | return 0; | |
2582 | } | |
2583 | ||
2584 | /* Check if running monitor interfaces should go to a "soft monitor" mode | |
2585 | * and switch them if necessary. */ | |
2586 | static inline void ieee80211_start_soft_monitor(struct ieee80211_local *local) | |
2587 | { | |
2588 | struct ieee80211_if_init_conf conf; | |
2589 | ||
2590 | if (local->open_count && local->open_count == local->monitors && | |
2591 | !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER) && | |
2592 | local->ops->remove_interface) { | |
2593 | conf.if_id = -1; | |
2594 | conf.type = IEEE80211_IF_TYPE_MNTR; | |
2595 | conf.mac_addr = NULL; | |
2596 | local->ops->remove_interface(local_to_hw(local), &conf); | |
2597 | } | |
2598 | } | |
2599 | ||
2600 | /* Check if running monitor interfaces should go to a "hard monitor" mode | |
2601 | * and switch them if necessary. */ | |
2602 | static void ieee80211_start_hard_monitor(struct ieee80211_local *local) | |
2603 | { | |
2604 | struct ieee80211_if_init_conf conf; | |
2605 | ||
2606 | if (local->open_count && local->open_count == local->monitors && | |
4480f15c | 2607 | !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) { |
f0706e82 JB |
2608 | conf.if_id = -1; |
2609 | conf.type = IEEE80211_IF_TYPE_MNTR; | |
2610 | conf.mac_addr = NULL; | |
2611 | local->ops->add_interface(local_to_hw(local), &conf); | |
2612 | } | |
2613 | } | |
2614 | ||
2615 | static int ieee80211_open(struct net_device *dev) | |
2616 | { | |
2617 | struct ieee80211_sub_if_data *sdata, *nsdata; | |
2618 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2619 | struct ieee80211_if_init_conf conf; | |
2620 | int res; | |
2621 | ||
2622 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2623 | read_lock(&local->sub_if_lock); | |
2624 | list_for_each_entry(nsdata, &local->sub_if_list, list) { | |
2625 | struct net_device *ndev = nsdata->dev; | |
2626 | ||
2627 | if (ndev != dev && ndev != local->mdev && netif_running(ndev) && | |
2628 | compare_ether_addr(dev->dev_addr, ndev->dev_addr) == 0 && | |
2629 | !identical_mac_addr_allowed(sdata->type, nsdata->type)) { | |
2630 | read_unlock(&local->sub_if_lock); | |
2631 | return -ENOTUNIQ; | |
2632 | } | |
2633 | } | |
2634 | read_unlock(&local->sub_if_lock); | |
2635 | ||
2636 | if (sdata->type == IEEE80211_IF_TYPE_WDS && | |
2637 | is_zero_ether_addr(sdata->u.wds.remote_addr)) | |
2638 | return -ENOLINK; | |
2639 | ||
2640 | if (sdata->type == IEEE80211_IF_TYPE_MNTR && local->open_count && | |
2641 | !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) { | |
2642 | /* run the interface in a "soft monitor" mode */ | |
2643 | local->monitors++; | |
2644 | local->open_count++; | |
2645 | local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP; | |
2646 | return 0; | |
2647 | } | |
2648 | ieee80211_start_soft_monitor(local); | |
2649 | ||
4480f15c JB |
2650 | conf.if_id = dev->ifindex; |
2651 | conf.type = sdata->type; | |
2652 | conf.mac_addr = dev->dev_addr; | |
2653 | res = local->ops->add_interface(local_to_hw(local), &conf); | |
2654 | if (res) { | |
2655 | if (sdata->type == IEEE80211_IF_TYPE_MNTR) | |
2656 | ieee80211_start_hard_monitor(local); | |
2657 | return res; | |
f0706e82 JB |
2658 | } |
2659 | ||
2660 | if (local->open_count == 0) { | |
2661 | res = 0; | |
2662 | tasklet_enable(&local->tx_pending_tasklet); | |
2663 | tasklet_enable(&local->tasklet); | |
2664 | if (local->ops->open) | |
2665 | res = local->ops->open(local_to_hw(local)); | |
2666 | if (res == 0) { | |
2667 | res = dev_open(local->mdev); | |
2668 | if (res) { | |
2669 | if (local->ops->stop) | |
2670 | local->ops->stop(local_to_hw(local)); | |
2671 | } else { | |
2672 | res = ieee80211_hw_config(local); | |
2673 | if (res && local->ops->stop) | |
2674 | local->ops->stop(local_to_hw(local)); | |
2675 | else if (!res && local->apdev) | |
2676 | dev_open(local->apdev); | |
2677 | } | |
2678 | } | |
2679 | if (res) { | |
2680 | if (local->ops->remove_interface) | |
2681 | local->ops->remove_interface(local_to_hw(local), | |
2682 | &conf); | |
2683 | return res; | |
2684 | } | |
2685 | } | |
2686 | local->open_count++; | |
2687 | ||
2688 | if (sdata->type == IEEE80211_IF_TYPE_MNTR) { | |
2689 | local->monitors++; | |
2690 | local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP; | |
2691 | } else | |
2692 | ieee80211_if_config(dev); | |
2693 | ||
2694 | if (sdata->type == IEEE80211_IF_TYPE_STA && | |
2695 | !local->user_space_mlme) | |
2696 | netif_carrier_off(dev); | |
52fb24cd MW |
2697 | else |
2698 | netif_carrier_on(dev); | |
f0706e82 JB |
2699 | |
2700 | netif_start_queue(dev); | |
2701 | return 0; | |
2702 | } | |
2703 | ||
2704 | ||
2705 | static int ieee80211_stop(struct net_device *dev) | |
2706 | { | |
2707 | struct ieee80211_sub_if_data *sdata; | |
2708 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2709 | ||
2710 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2711 | ||
2712 | if (sdata->type == IEEE80211_IF_TYPE_MNTR && | |
2713 | local->open_count > 1 && | |
2714 | !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) { | |
2715 | /* remove "soft monitor" interface */ | |
2716 | local->open_count--; | |
2717 | local->monitors--; | |
2718 | if (!local->monitors) | |
2719 | local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP; | |
2720 | return 0; | |
2721 | } | |
2722 | ||
2723 | netif_stop_queue(dev); | |
2724 | ieee80211_if_shutdown(dev); | |
2725 | ||
2726 | if (sdata->type == IEEE80211_IF_TYPE_MNTR) { | |
2727 | local->monitors--; | |
2728 | if (!local->monitors) | |
2729 | local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP; | |
2730 | } | |
2731 | ||
2732 | local->open_count--; | |
2733 | if (local->open_count == 0) { | |
2734 | if (netif_running(local->mdev)) | |
2735 | dev_close(local->mdev); | |
2736 | if (local->apdev) | |
2737 | dev_close(local->apdev); | |
2738 | if (local->ops->stop) | |
2739 | local->ops->stop(local_to_hw(local)); | |
2740 | tasklet_disable(&local->tx_pending_tasklet); | |
2741 | tasklet_disable(&local->tasklet); | |
2742 | } | |
2743 | if (local->ops->remove_interface) { | |
2744 | struct ieee80211_if_init_conf conf; | |
2745 | ||
2746 | conf.if_id = dev->ifindex; | |
2747 | conf.type = sdata->type; | |
2748 | conf.mac_addr = dev->dev_addr; | |
2749 | local->ops->remove_interface(local_to_hw(local), &conf); | |
2750 | } | |
2751 | ||
2752 | ieee80211_start_hard_monitor(local); | |
2753 | ||
2754 | return 0; | |
2755 | } | |
2756 | ||
2757 | ||
2758 | static int header_parse_80211(struct sk_buff *skb, unsigned char *haddr) | |
2759 | { | |
2760 | memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */ | |
2761 | return ETH_ALEN; | |
2762 | } | |
2763 | ||
2764 | static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr) | |
2765 | { | |
2766 | return compare_ether_addr(raddr, addr) == 0 || | |
2767 | is_broadcast_ether_addr(raddr); | |
2768 | } | |
2769 | ||
2770 | ||
2771 | static ieee80211_txrx_result | |
2772 | ieee80211_rx_h_data(struct ieee80211_txrx_data *rx) | |
2773 | { | |
2774 | struct net_device *dev = rx->dev; | |
2775 | struct ieee80211_local *local = rx->local; | |
2776 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) rx->skb->data; | |
2777 | u16 fc, hdrlen, ethertype; | |
2778 | u8 *payload; | |
2779 | u8 dst[ETH_ALEN]; | |
2780 | u8 src[ETH_ALEN]; | |
2781 | struct sk_buff *skb = rx->skb, *skb2; | |
2782 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2783 | ||
2784 | fc = rx->fc; | |
2785 | if (unlikely((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA)) | |
2786 | return TXRX_CONTINUE; | |
2787 | ||
2788 | if (unlikely(!WLAN_FC_DATA_PRESENT(fc))) | |
2789 | return TXRX_DROP; | |
2790 | ||
2791 | hdrlen = ieee80211_get_hdrlen(fc); | |
2792 | ||
2793 | /* convert IEEE 802.11 header + possible LLC headers into Ethernet | |
2794 | * header | |
2795 | * IEEE 802.11 address fields: | |
2796 | * ToDS FromDS Addr1 Addr2 Addr3 Addr4 | |
2797 | * 0 0 DA SA BSSID n/a | |
2798 | * 0 1 DA BSSID SA n/a | |
2799 | * 1 0 BSSID SA DA n/a | |
2800 | * 1 1 RA TA DA SA | |
2801 | */ | |
2802 | ||
2803 | switch (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) { | |
2804 | case IEEE80211_FCTL_TODS: | |
2805 | /* BSSID SA DA */ | |
2806 | memcpy(dst, hdr->addr3, ETH_ALEN); | |
2807 | memcpy(src, hdr->addr2, ETH_ALEN); | |
2808 | ||
2809 | if (unlikely(sdata->type != IEEE80211_IF_TYPE_AP && | |
2810 | sdata->type != IEEE80211_IF_TYPE_VLAN)) { | |
2811 | printk(KERN_DEBUG "%s: dropped ToDS frame (BSSID=" | |
2812 | MAC_FMT " SA=" MAC_FMT " DA=" MAC_FMT ")\n", | |
2813 | dev->name, MAC_ARG(hdr->addr1), | |
2814 | MAC_ARG(hdr->addr2), MAC_ARG(hdr->addr3)); | |
2815 | return TXRX_DROP; | |
2816 | } | |
2817 | break; | |
2818 | case (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS): | |
2819 | /* RA TA DA SA */ | |
2820 | memcpy(dst, hdr->addr3, ETH_ALEN); | |
2821 | memcpy(src, hdr->addr4, ETH_ALEN); | |
2822 | ||
2823 | if (unlikely(sdata->type != IEEE80211_IF_TYPE_WDS)) { | |
2824 | printk(KERN_DEBUG "%s: dropped FromDS&ToDS frame (RA=" | |
2825 | MAC_FMT " TA=" MAC_FMT " DA=" MAC_FMT " SA=" | |
2826 | MAC_FMT ")\n", | |
2827 | rx->dev->name, MAC_ARG(hdr->addr1), | |
2828 | MAC_ARG(hdr->addr2), MAC_ARG(hdr->addr3), | |
2829 | MAC_ARG(hdr->addr4)); | |
2830 | return TXRX_DROP; | |
2831 | } | |
2832 | break; | |
2833 | case IEEE80211_FCTL_FROMDS: | |
2834 | /* DA BSSID SA */ | |
2835 | memcpy(dst, hdr->addr1, ETH_ALEN); | |
2836 | memcpy(src, hdr->addr3, ETH_ALEN); | |
2837 | ||
2838 | if (sdata->type != IEEE80211_IF_TYPE_STA) { | |
2839 | return TXRX_DROP; | |
2840 | } | |
2841 | break; | |
2842 | case 0: | |
2843 | /* DA SA BSSID */ | |
2844 | memcpy(dst, hdr->addr1, ETH_ALEN); | |
2845 | memcpy(src, hdr->addr2, ETH_ALEN); | |
2846 | ||
2847 | if (sdata->type != IEEE80211_IF_TYPE_IBSS) { | |
2848 | if (net_ratelimit()) { | |
2849 | printk(KERN_DEBUG "%s: dropped IBSS frame (DA=" | |
2850 | MAC_FMT " SA=" MAC_FMT " BSSID=" MAC_FMT | |
2851 | ")\n", | |
2852 | dev->name, MAC_ARG(hdr->addr1), | |
2853 | MAC_ARG(hdr->addr2), | |
2854 | MAC_ARG(hdr->addr3)); | |
2855 | } | |
2856 | return TXRX_DROP; | |
2857 | } | |
2858 | break; | |
2859 | } | |
2860 | ||
2861 | payload = skb->data + hdrlen; | |
2862 | ||
2863 | if (unlikely(skb->len - hdrlen < 8)) { | |
2864 | if (net_ratelimit()) { | |
2865 | printk(KERN_DEBUG "%s: RX too short data frame " | |
2866 | "payload\n", dev->name); | |
2867 | } | |
2868 | return TXRX_DROP; | |
2869 | } | |
2870 | ||
2871 | ethertype = (payload[6] << 8) | payload[7]; | |
2872 | ||
2873 | if (likely((compare_ether_addr(payload, rfc1042_header) == 0 && | |
2874 | ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || | |
2875 | compare_ether_addr(payload, bridge_tunnel_header) == 0)) { | |
2876 | /* remove RFC1042 or Bridge-Tunnel encapsulation and | |
2877 | * replace EtherType */ | |
2878 | skb_pull(skb, hdrlen + 6); | |
2879 | memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN); | |
2880 | memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN); | |
2881 | } else { | |
2882 | struct ethhdr *ehdr; | |
2883 | __be16 len; | |
2884 | skb_pull(skb, hdrlen); | |
2885 | len = htons(skb->len); | |
2886 | ehdr = (struct ethhdr *) skb_push(skb, sizeof(struct ethhdr)); | |
2887 | memcpy(ehdr->h_dest, dst, ETH_ALEN); | |
2888 | memcpy(ehdr->h_source, src, ETH_ALEN); | |
2889 | ehdr->h_proto = len; | |
2890 | } | |
2891 | skb->dev = dev; | |
2892 | ||
2893 | skb2 = NULL; | |
2894 | ||
2895 | sdata->stats.rx_packets++; | |
2896 | sdata->stats.rx_bytes += skb->len; | |
2897 | ||
2898 | if (local->bridge_packets && (sdata->type == IEEE80211_IF_TYPE_AP | |
2899 | || sdata->type == IEEE80211_IF_TYPE_VLAN) && rx->u.rx.ra_match) { | |
2900 | if (is_multicast_ether_addr(skb->data)) { | |
2901 | /* send multicast frames both to higher layers in | |
2902 | * local net stack and back to the wireless media */ | |
2903 | skb2 = skb_copy(skb, GFP_ATOMIC); | |
2904 | if (!skb2) | |
2905 | printk(KERN_DEBUG "%s: failed to clone " | |
2906 | "multicast frame\n", dev->name); | |
2907 | } else { | |
2908 | struct sta_info *dsta; | |
2909 | dsta = sta_info_get(local, skb->data); | |
2910 | if (dsta && !dsta->dev) { | |
2911 | printk(KERN_DEBUG "Station with null dev " | |
2912 | "structure!\n"); | |
2913 | } else if (dsta && dsta->dev == dev) { | |
2914 | /* Destination station is associated to this | |
2915 | * AP, so send the frame directly to it and | |
2916 | * do not pass the frame to local net stack. | |
2917 | */ | |
2918 | skb2 = skb; | |
2919 | skb = NULL; | |
2920 | } | |
2921 | if (dsta) | |
2922 | sta_info_put(dsta); | |
2923 | } | |
2924 | } | |
2925 | ||
2926 | if (skb) { | |
2927 | /* deliver to local stack */ | |
2928 | skb->protocol = eth_type_trans(skb, dev); | |
2929 | memset(skb->cb, 0, sizeof(skb->cb)); | |
2930 | netif_rx(skb); | |
2931 | } | |
2932 | ||
2933 | if (skb2) { | |
2934 | /* send to wireless media */ | |
2935 | skb2->protocol = __constant_htons(ETH_P_802_3); | |
2936 | skb_set_network_header(skb2, 0); | |
2937 | skb_set_mac_header(skb2, 0); | |
2938 | dev_queue_xmit(skb2); | |
2939 | } | |
2940 | ||
2941 | return TXRX_QUEUED; | |
2942 | } | |
2943 | ||
2944 | ||
2945 | static struct ieee80211_rate * | |
2946 | ieee80211_get_rate(struct ieee80211_local *local, int phymode, int hw_rate) | |
2947 | { | |
2948 | struct ieee80211_hw_mode *mode; | |
2949 | int r; | |
2950 | ||
2951 | list_for_each_entry(mode, &local->modes_list, list) { | |
2952 | if (mode->mode != phymode) | |
2953 | continue; | |
2954 | for (r = 0; r < mode->num_rates; r++) { | |
2955 | struct ieee80211_rate *rate = &mode->rates[r]; | |
2956 | if (rate->val == hw_rate || | |
2957 | (rate->flags & IEEE80211_RATE_PREAMBLE2 && | |
2958 | rate->val2 == hw_rate)) | |
2959 | return rate; | |
2960 | } | |
2961 | } | |
2962 | ||
2963 | return NULL; | |
2964 | } | |
2965 | ||
2966 | static void | |
2967 | ieee80211_fill_frame_info(struct ieee80211_local *local, | |
2968 | struct ieee80211_frame_info *fi, | |
2969 | struct ieee80211_rx_status *status) | |
2970 | { | |
2971 | if (status) { | |
2972 | struct timespec ts; | |
2973 | struct ieee80211_rate *rate; | |
2974 | ||
2975 | jiffies_to_timespec(jiffies, &ts); | |
2976 | fi->hosttime = cpu_to_be64((u64) ts.tv_sec * 1000000 + | |
2977 | ts.tv_nsec / 1000); | |
2978 | fi->mactime = cpu_to_be64(status->mactime); | |
2979 | switch (status->phymode) { | |
2980 | case MODE_IEEE80211A: | |
2981 | fi->phytype = htonl(ieee80211_phytype_ofdm_dot11_a); | |
2982 | break; | |
2983 | case MODE_IEEE80211B: | |
2984 | fi->phytype = htonl(ieee80211_phytype_dsss_dot11_b); | |
2985 | break; | |
2986 | case MODE_IEEE80211G: | |
2987 | fi->phytype = htonl(ieee80211_phytype_pbcc_dot11_g); | |
2988 | break; | |
2989 | case MODE_ATHEROS_TURBO: | |
2990 | fi->phytype = | |
2991 | htonl(ieee80211_phytype_dsss_dot11_turbo); | |
2992 | break; | |
2993 | default: | |
2994 | fi->phytype = htonl(0xAAAAAAAA); | |
2995 | break; | |
2996 | } | |
2997 | fi->channel = htonl(status->channel); | |
2998 | rate = ieee80211_get_rate(local, status->phymode, | |
2999 | status->rate); | |
3000 | if (rate) { | |
3001 | fi->datarate = htonl(rate->rate); | |
3002 | if (rate->flags & IEEE80211_RATE_PREAMBLE2) { | |
3003 | if (status->rate == rate->val) | |
3004 | fi->preamble = htonl(2); /* long */ | |
3005 | else if (status->rate == rate->val2) | |
3006 | fi->preamble = htonl(1); /* short */ | |
3007 | } else | |
3008 | fi->preamble = htonl(0); | |
3009 | } else { | |
3010 | fi->datarate = htonl(0); | |
3011 | fi->preamble = htonl(0); | |
3012 | } | |
3013 | ||
3014 | fi->antenna = htonl(status->antenna); | |
3015 | fi->priority = htonl(0xffffffff); /* no clue */ | |
3016 | fi->ssi_type = htonl(ieee80211_ssi_raw); | |
3017 | fi->ssi_signal = htonl(status->ssi); | |
3018 | fi->ssi_noise = 0x00000000; | |
3019 | fi->encoding = 0; | |
3020 | } else { | |
3021 | /* clear everything because we really don't know. | |
3022 | * the msg_type field isn't present on monitor frames | |
3023 | * so we don't know whether it will be present or not, | |
3024 | * but it's ok to not clear it since it'll be assigned | |
3025 | * anyway */ | |
3026 | memset(fi, 0, sizeof(*fi) - sizeof(fi->msg_type)); | |
3027 | ||
3028 | fi->ssi_type = htonl(ieee80211_ssi_none); | |
3029 | } | |
3030 | fi->version = htonl(IEEE80211_FI_VERSION); | |
3031 | fi->length = cpu_to_be32(sizeof(*fi) - sizeof(fi->msg_type)); | |
3032 | } | |
3033 | ||
3034 | /* this routine is actually not just for this, but also | |
3035 | * for pushing fake 'management' frames into userspace. | |
3036 | * it shall be replaced by a netlink-based system. */ | |
3037 | void | |
3038 | ieee80211_rx_mgmt(struct ieee80211_local *local, struct sk_buff *skb, | |
3039 | struct ieee80211_rx_status *status, u32 msg_type) | |
3040 | { | |
3041 | struct ieee80211_frame_info *fi; | |
3042 | const size_t hlen = sizeof(struct ieee80211_frame_info); | |
3043 | struct ieee80211_sub_if_data *sdata; | |
3044 | ||
3045 | skb->dev = local->apdev; | |
3046 | ||
3047 | sdata = IEEE80211_DEV_TO_SUB_IF(local->apdev); | |
3048 | ||
3049 | if (skb_headroom(skb) < hlen) { | |
3050 | I802_DEBUG_INC(local->rx_expand_skb_head); | |
3051 | if (pskb_expand_head(skb, hlen, 0, GFP_ATOMIC)) { | |
3052 | dev_kfree_skb(skb); | |
3053 | return; | |
3054 | } | |
3055 | } | |
3056 | ||
3057 | fi = (struct ieee80211_frame_info *) skb_push(skb, hlen); | |
3058 | ||
3059 | ieee80211_fill_frame_info(local, fi, status); | |
3060 | fi->msg_type = htonl(msg_type); | |
3061 | ||
3062 | sdata->stats.rx_packets++; | |
3063 | sdata->stats.rx_bytes += skb->len; | |
3064 | ||
3065 | skb_set_mac_header(skb, 0); | |
3066 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
3067 | skb->pkt_type = PACKET_OTHERHOST; | |
3068 | skb->protocol = htons(ETH_P_802_2); | |
3069 | memset(skb->cb, 0, sizeof(skb->cb)); | |
3070 | netif_rx(skb); | |
3071 | } | |
3072 | ||
3073 | static void | |
3074 | ieee80211_rx_monitor(struct net_device *dev, struct sk_buff *skb, | |
3075 | struct ieee80211_rx_status *status) | |
3076 | { | |
3077 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
3078 | struct ieee80211_sub_if_data *sdata; | |
3079 | struct ieee80211_rate *rate; | |
3080 | struct ieee80211_rtap_hdr { | |
3081 | struct ieee80211_radiotap_header hdr; | |
3082 | u8 flags; | |
3083 | u8 rate; | |
3084 | __le16 chan_freq; | |
3085 | __le16 chan_flags; | |
3086 | u8 antsignal; | |
3087 | } __attribute__ ((packed)) *rthdr; | |
3088 | ||
3089 | skb->dev = dev; | |
3090 | ||
3091 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
3092 | ||
3093 | if (status->flag & RX_FLAG_RADIOTAP) | |
3094 | goto out; | |
3095 | ||
3096 | if (skb_headroom(skb) < sizeof(*rthdr)) { | |
3097 | I802_DEBUG_INC(local->rx_expand_skb_head); | |
3098 | if (pskb_expand_head(skb, sizeof(*rthdr), 0, GFP_ATOMIC)) { | |
3099 | dev_kfree_skb(skb); | |
3100 | return; | |
3101 | } | |
3102 | } | |
3103 | ||
3104 | rthdr = (struct ieee80211_rtap_hdr *) skb_push(skb, sizeof(*rthdr)); | |
3105 | memset(rthdr, 0, sizeof(*rthdr)); | |
3106 | rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr)); | |
3107 | rthdr->hdr.it_present = | |
3108 | cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) | | |
3109 | (1 << IEEE80211_RADIOTAP_RATE) | | |
3110 | (1 << IEEE80211_RADIOTAP_CHANNEL) | | |
3111 | (1 << IEEE80211_RADIOTAP_DB_ANTSIGNAL)); | |
3112 | rthdr->flags = local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS ? | |
3113 | IEEE80211_RADIOTAP_F_FCS : 0; | |
3114 | rate = ieee80211_get_rate(local, status->phymode, status->rate); | |
3115 | if (rate) | |
3116 | rthdr->rate = rate->rate / 5; | |
3117 | rthdr->chan_freq = cpu_to_le16(status->freq); | |
3118 | rthdr->chan_flags = | |
3119 | status->phymode == MODE_IEEE80211A ? | |
3120 | cpu_to_le16(IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ) : | |
3121 | cpu_to_le16(IEEE80211_CHAN_DYN | IEEE80211_CHAN_2GHZ); | |
3122 | rthdr->antsignal = status->ssi; | |
3123 | ||
3124 | out: | |
3125 | sdata->stats.rx_packets++; | |
3126 | sdata->stats.rx_bytes += skb->len; | |
3127 | ||
3128 | skb_set_mac_header(skb, 0); | |
3129 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
3130 | skb->pkt_type = PACKET_OTHERHOST; | |
3131 | skb->protocol = htons(ETH_P_802_2); | |
3132 | memset(skb->cb, 0, sizeof(skb->cb)); | |
3133 | netif_rx(skb); | |
3134 | } | |
3135 | ||
3136 | int ieee80211_radar_status(struct ieee80211_hw *hw, int channel, | |
3137 | int radar, int radar_type) | |
3138 | { | |
3139 | struct sk_buff *skb; | |
3140 | struct ieee80211_radar_info *msg; | |
3141 | struct ieee80211_local *local = hw_to_local(hw); | |
3142 | ||
3143 | if (!local->apdev) | |
3144 | return 0; | |
3145 | ||
3146 | skb = dev_alloc_skb(sizeof(struct ieee80211_frame_info) + | |
3147 | sizeof(struct ieee80211_radar_info)); | |
3148 | ||
3149 | if (!skb) | |
3150 | return -ENOMEM; | |
3151 | skb_reserve(skb, sizeof(struct ieee80211_frame_info)); | |
3152 | ||
3153 | msg = (struct ieee80211_radar_info *) | |
3154 | skb_put(skb, sizeof(struct ieee80211_radar_info)); | |
3155 | msg->channel = channel; | |
3156 | msg->radar = radar; | |
3157 | msg->radar_type = radar_type; | |
3158 | ||
3159 | ieee80211_rx_mgmt(local, skb, NULL, ieee80211_msg_radar); | |
3160 | return 0; | |
3161 | } | |
3162 | EXPORT_SYMBOL(ieee80211_radar_status); | |
3163 | ||
f0706e82 JB |
3164 | |
3165 | static void ap_sta_ps_start(struct net_device *dev, struct sta_info *sta) | |
3166 | { | |
3167 | struct ieee80211_sub_if_data *sdata; | |
3168 | sdata = IEEE80211_DEV_TO_SUB_IF(sta->dev); | |
3169 | ||
3170 | if (sdata->bss) | |
3171 | atomic_inc(&sdata->bss->num_sta_ps); | |
3172 | sta->flags |= WLAN_STA_PS; | |
3173 | sta->pspoll = 0; | |
3174 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG | |
3175 | printk(KERN_DEBUG "%s: STA " MAC_FMT " aid %d enters power " | |
3176 | "save mode\n", dev->name, MAC_ARG(sta->addr), sta->aid); | |
3177 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ | |
3178 | } | |
3179 | ||
3180 | ||
3181 | static int ap_sta_ps_end(struct net_device *dev, struct sta_info *sta) | |
3182 | { | |
3183 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
3184 | struct sk_buff *skb; | |
3185 | int sent = 0; | |
3186 | struct ieee80211_sub_if_data *sdata; | |
3187 | struct ieee80211_tx_packet_data *pkt_data; | |
3188 | ||
3189 | sdata = IEEE80211_DEV_TO_SUB_IF(sta->dev); | |
3190 | if (sdata->bss) | |
3191 | atomic_dec(&sdata->bss->num_sta_ps); | |
3192 | sta->flags &= ~(WLAN_STA_PS | WLAN_STA_TIM); | |
3193 | sta->pspoll = 0; | |
3194 | if (!skb_queue_empty(&sta->ps_tx_buf)) { | |
3195 | if (local->ops->set_tim) | |
3196 | local->ops->set_tim(local_to_hw(local), sta->aid, 0); | |
3197 | if (sdata->bss) | |
3198 | bss_tim_clear(local, sdata->bss, sta->aid); | |
3199 | } | |
3200 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG | |
3201 | printk(KERN_DEBUG "%s: STA " MAC_FMT " aid %d exits power " | |
3202 | "save mode\n", dev->name, MAC_ARG(sta->addr), sta->aid); | |
3203 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ | |
3204 | /* Send all buffered frames to the station */ | |
3205 | while ((skb = skb_dequeue(&sta->tx_filtered)) != NULL) { | |
3206 | pkt_data = (struct ieee80211_tx_packet_data *) skb->cb; | |
3207 | sent++; | |
3208 | pkt_data->requeue = 1; | |
3209 | dev_queue_xmit(skb); | |
3210 | } | |
3211 | while ((skb = skb_dequeue(&sta->ps_tx_buf)) != NULL) { | |
3212 | pkt_data = (struct ieee80211_tx_packet_data *) skb->cb; | |
3213 | local->total_ps_buffered--; | |
3214 | sent++; | |
3215 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG | |
3216 | printk(KERN_DEBUG "%s: STA " MAC_FMT " aid %d send PS frame " | |
3217 | "since STA not sleeping anymore\n", dev->name, | |
3218 | MAC_ARG(sta->addr), sta->aid); | |
3219 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ | |
3220 | pkt_data->requeue = 1; | |
3221 | dev_queue_xmit(skb); | |
3222 | } | |
3223 | ||
3224 | return sent; | |
3225 | } | |
3226 | ||
3227 | ||
3228 | static ieee80211_txrx_result | |
3229 | ieee80211_rx_h_ps_poll(struct ieee80211_txrx_data *rx) | |
3230 | { | |
3231 | struct sk_buff *skb; | |
3232 | int no_pending_pkts; | |
3233 | ||
3234 | if (likely(!rx->sta || | |
3235 | (rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_CTL || | |
3236 | (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_PSPOLL || | |
3237 | !rx->u.rx.ra_match)) | |
3238 | return TXRX_CONTINUE; | |
3239 | ||
3240 | skb = skb_dequeue(&rx->sta->tx_filtered); | |
3241 | if (!skb) { | |
3242 | skb = skb_dequeue(&rx->sta->ps_tx_buf); | |
3243 | if (skb) | |
3244 | rx->local->total_ps_buffered--; | |
3245 | } | |
3246 | no_pending_pkts = skb_queue_empty(&rx->sta->tx_filtered) && | |
3247 | skb_queue_empty(&rx->sta->ps_tx_buf); | |
3248 | ||
3249 | if (skb) { | |
3250 | struct ieee80211_hdr *hdr = | |
3251 | (struct ieee80211_hdr *) skb->data; | |
3252 | ||
3253 | /* tell TX path to send one frame even though the STA may | |
3254 | * still remain is PS mode after this frame exchange */ | |
3255 | rx->sta->pspoll = 1; | |
3256 | ||
3257 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG | |
3258 | printk(KERN_DEBUG "STA " MAC_FMT " aid %d: PS Poll (entries " | |
3259 | "after %d)\n", | |
3260 | MAC_ARG(rx->sta->addr), rx->sta->aid, | |
3261 | skb_queue_len(&rx->sta->ps_tx_buf)); | |
3262 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ | |
3263 | ||
3264 | /* Use MoreData flag to indicate whether there are more | |
3265 | * buffered frames for this STA */ | |
3266 | if (no_pending_pkts) { | |
3267 | hdr->frame_control &= cpu_to_le16(~IEEE80211_FCTL_MOREDATA); | |
3268 | rx->sta->flags &= ~WLAN_STA_TIM; | |
3269 | } else | |
3270 | hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
3271 | ||
3272 | dev_queue_xmit(skb); | |
3273 | ||
3274 | if (no_pending_pkts) { | |
3275 | if (rx->local->ops->set_tim) | |
3276 | rx->local->ops->set_tim(local_to_hw(rx->local), | |
3277 | rx->sta->aid, 0); | |
3278 | if (rx->sdata->bss) | |
3279 | bss_tim_clear(rx->local, rx->sdata->bss, rx->sta->aid); | |
3280 | } | |
3281 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG | |
3282 | } else if (!rx->u.rx.sent_ps_buffered) { | |
3283 | printk(KERN_DEBUG "%s: STA " MAC_FMT " sent PS Poll even " | |
3284 | "though there is no buffered frames for it\n", | |
3285 | rx->dev->name, MAC_ARG(rx->sta->addr)); | |
3286 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ | |
3287 | ||
3288 | } | |
3289 | ||
3290 | /* Free PS Poll skb here instead of returning TXRX_DROP that would | |
3291 | * count as an dropped frame. */ | |
3292 | dev_kfree_skb(rx->skb); | |
3293 | ||
3294 | return TXRX_QUEUED; | |
3295 | } | |
3296 | ||
3297 | ||
3298 | static inline struct ieee80211_fragment_entry * | |
3299 | ieee80211_reassemble_add(struct ieee80211_sub_if_data *sdata, | |
3300 | unsigned int frag, unsigned int seq, int rx_queue, | |
3301 | struct sk_buff **skb) | |
3302 | { | |
3303 | struct ieee80211_fragment_entry *entry; | |
3304 | int idx; | |
3305 | ||
3306 | idx = sdata->fragment_next; | |
3307 | entry = &sdata->fragments[sdata->fragment_next++]; | |
3308 | if (sdata->fragment_next >= IEEE80211_FRAGMENT_MAX) | |
3309 | sdata->fragment_next = 0; | |
3310 | ||
3311 | if (!skb_queue_empty(&entry->skb_list)) { | |
3312 | #ifdef CONFIG_MAC80211_DEBUG | |
3313 | struct ieee80211_hdr *hdr = | |
3314 | (struct ieee80211_hdr *) entry->skb_list.next->data; | |
3315 | printk(KERN_DEBUG "%s: RX reassembly removed oldest " | |
3316 | "fragment entry (idx=%d age=%lu seq=%d last_frag=%d " | |
3317 | "addr1=" MAC_FMT " addr2=" MAC_FMT "\n", | |
3318 | sdata->dev->name, idx, | |
3319 | jiffies - entry->first_frag_time, entry->seq, | |
3320 | entry->last_frag, MAC_ARG(hdr->addr1), | |
3321 | MAC_ARG(hdr->addr2)); | |
3322 | #endif /* CONFIG_MAC80211_DEBUG */ | |
3323 | __skb_queue_purge(&entry->skb_list); | |
3324 | } | |
3325 | ||
3326 | __skb_queue_tail(&entry->skb_list, *skb); /* no need for locking */ | |
3327 | *skb = NULL; | |
3328 | entry->first_frag_time = jiffies; | |
3329 | entry->seq = seq; | |
3330 | entry->rx_queue = rx_queue; | |
3331 | entry->last_frag = frag; | |
3332 | entry->ccmp = 0; | |
3333 | entry->extra_len = 0; | |
3334 | ||
3335 | return entry; | |
3336 | } | |
3337 | ||
3338 | ||
3339 | static inline struct ieee80211_fragment_entry * | |
3340 | ieee80211_reassemble_find(struct ieee80211_sub_if_data *sdata, | |
3341 | u16 fc, unsigned int frag, unsigned int seq, | |
3342 | int rx_queue, struct ieee80211_hdr *hdr) | |
3343 | { | |
3344 | struct ieee80211_fragment_entry *entry; | |
3345 | int i, idx; | |
3346 | ||
3347 | idx = sdata->fragment_next; | |
3348 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) { | |
3349 | struct ieee80211_hdr *f_hdr; | |
3350 | u16 f_fc; | |
3351 | ||
3352 | idx--; | |
3353 | if (idx < 0) | |
3354 | idx = IEEE80211_FRAGMENT_MAX - 1; | |
3355 | ||
3356 | entry = &sdata->fragments[idx]; | |
3357 | if (skb_queue_empty(&entry->skb_list) || entry->seq != seq || | |
3358 | entry->rx_queue != rx_queue || | |
3359 | entry->last_frag + 1 != frag) | |
3360 | continue; | |
3361 | ||
3362 | f_hdr = (struct ieee80211_hdr *) entry->skb_list.next->data; | |
3363 | f_fc = le16_to_cpu(f_hdr->frame_control); | |
3364 | ||
3365 | if ((fc & IEEE80211_FCTL_FTYPE) != (f_fc & IEEE80211_FCTL_FTYPE) || | |
3366 | compare_ether_addr(hdr->addr1, f_hdr->addr1) != 0 || | |
3367 | compare_ether_addr(hdr->addr2, f_hdr->addr2) != 0) | |
3368 | continue; | |
3369 | ||
3370 | if (entry->first_frag_time + 2 * HZ < jiffies) { | |
3371 | __skb_queue_purge(&entry->skb_list); | |
3372 | continue; | |
3373 | } | |
3374 | return entry; | |
3375 | } | |
3376 | ||
3377 | return NULL; | |
3378 | } | |
3379 | ||
3380 | ||
3381 | static ieee80211_txrx_result | |
3382 | ieee80211_rx_h_defragment(struct ieee80211_txrx_data *rx) | |
3383 | { | |
3384 | struct ieee80211_hdr *hdr; | |
3385 | u16 sc; | |
3386 | unsigned int frag, seq; | |
3387 | struct ieee80211_fragment_entry *entry; | |
3388 | struct sk_buff *skb; | |
3389 | ||
3390 | hdr = (struct ieee80211_hdr *) rx->skb->data; | |
3391 | sc = le16_to_cpu(hdr->seq_ctrl); | |
3392 | frag = sc & IEEE80211_SCTL_FRAG; | |
3393 | ||
3394 | if (likely((!(rx->fc & IEEE80211_FCTL_MOREFRAGS) && frag == 0) || | |
3395 | (rx->skb)->len < 24 || | |
3396 | is_multicast_ether_addr(hdr->addr1))) { | |
3397 | /* not fragmented */ | |
3398 | goto out; | |
3399 | } | |
3400 | I802_DEBUG_INC(rx->local->rx_handlers_fragments); | |
3401 | ||
3402 | seq = (sc & IEEE80211_SCTL_SEQ) >> 4; | |
3403 | ||
3404 | if (frag == 0) { | |
3405 | /* This is the first fragment of a new frame. */ | |
3406 | entry = ieee80211_reassemble_add(rx->sdata, frag, seq, | |
3407 | rx->u.rx.queue, &(rx->skb)); | |
3408 | if (rx->key && rx->key->alg == ALG_CCMP && | |
3409 | (rx->fc & IEEE80211_FCTL_PROTECTED)) { | |
3410 | /* Store CCMP PN so that we can verify that the next | |
3411 | * fragment has a sequential PN value. */ | |
3412 | entry->ccmp = 1; | |
3413 | memcpy(entry->last_pn, | |
3414 | rx->key->u.ccmp.rx_pn[rx->u.rx.queue], | |
3415 | CCMP_PN_LEN); | |
3416 | } | |
3417 | return TXRX_QUEUED; | |
3418 | } | |
3419 | ||
3420 | /* This is a fragment for a frame that should already be pending in | |
3421 | * fragment cache. Add this fragment to the end of the pending entry. | |
3422 | */ | |
3423 | entry = ieee80211_reassemble_find(rx->sdata, rx->fc, frag, seq, | |
3424 | rx->u.rx.queue, hdr); | |
3425 | if (!entry) { | |
3426 | I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag); | |
3427 | return TXRX_DROP; | |
3428 | } | |
3429 | ||
3430 | /* Verify that MPDUs within one MSDU have sequential PN values. | |
3431 | * (IEEE 802.11i, 8.3.3.4.5) */ | |
3432 | if (entry->ccmp) { | |
3433 | int i; | |
3434 | u8 pn[CCMP_PN_LEN], *rpn; | |
3435 | if (!rx->key || rx->key->alg != ALG_CCMP) | |
3436 | return TXRX_DROP; | |
3437 | memcpy(pn, entry->last_pn, CCMP_PN_LEN); | |
3438 | for (i = CCMP_PN_LEN - 1; i >= 0; i--) { | |
3439 | pn[i]++; | |
3440 | if (pn[i]) | |
3441 | break; | |
3442 | } | |
3443 | rpn = rx->key->u.ccmp.rx_pn[rx->u.rx.queue]; | |
3444 | if (memcmp(pn, rpn, CCMP_PN_LEN) != 0) { | |
3445 | printk(KERN_DEBUG "%s: defrag: CCMP PN not sequential" | |
3446 | " A2=" MAC_FMT " PN=%02x%02x%02x%02x%02x%02x " | |
3447 | "(expected %02x%02x%02x%02x%02x%02x)\n", | |
3448 | rx->dev->name, MAC_ARG(hdr->addr2), | |
3449 | rpn[0], rpn[1], rpn[2], rpn[3], rpn[4], rpn[5], | |
3450 | pn[0], pn[1], pn[2], pn[3], pn[4], pn[5]); | |
3451 | return TXRX_DROP; | |
3452 | } | |
3453 | memcpy(entry->last_pn, pn, CCMP_PN_LEN); | |
3454 | } | |
3455 | ||
3456 | skb_pull(rx->skb, ieee80211_get_hdrlen(rx->fc)); | |
3457 | __skb_queue_tail(&entry->skb_list, rx->skb); | |
3458 | entry->last_frag = frag; | |
3459 | entry->extra_len += rx->skb->len; | |
3460 | if (rx->fc & IEEE80211_FCTL_MOREFRAGS) { | |
3461 | rx->skb = NULL; | |
3462 | return TXRX_QUEUED; | |
3463 | } | |
3464 | ||
3465 | rx->skb = __skb_dequeue(&entry->skb_list); | |
3466 | if (skb_tailroom(rx->skb) < entry->extra_len) { | |
3467 | I802_DEBUG_INC(rx->local->rx_expand_skb_head2); | |
3468 | if (unlikely(pskb_expand_head(rx->skb, 0, entry->extra_len, | |
3469 | GFP_ATOMIC))) { | |
3470 | I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag); | |
3471 | __skb_queue_purge(&entry->skb_list); | |
3472 | return TXRX_DROP; | |
3473 | } | |
3474 | } | |
e8fdeca2 | 3475 | while ((skb = __skb_dequeue(&entry->skb_list))) { |
f0706e82 | 3476 | memcpy(skb_put(rx->skb, skb->len), skb->data, skb->len); |
e8fdeca2 HL |
3477 | dev_kfree_skb(skb); |
3478 | } | |
f0706e82 JB |
3479 | |
3480 | /* Complete frame has been reassembled - process it now */ | |
3481 | rx->fragmented = 1; | |
3482 | ||
3483 | out: | |
3484 | if (rx->sta) | |
3485 | rx->sta->rx_packets++; | |
3486 | if (is_multicast_ether_addr(hdr->addr1)) | |
3487 | rx->local->dot11MulticastReceivedFrameCount++; | |
3488 | else | |
3489 | ieee80211_led_rx(rx->local); | |
3490 | return TXRX_CONTINUE; | |
3491 | } | |
3492 | ||
3493 | ||
3494 | static ieee80211_txrx_result | |
3495 | ieee80211_rx_h_monitor(struct ieee80211_txrx_data *rx) | |
3496 | { | |
3497 | if (rx->sdata->type == IEEE80211_IF_TYPE_MNTR) { | |
3498 | ieee80211_rx_monitor(rx->dev, rx->skb, rx->u.rx.status); | |
3499 | return TXRX_QUEUED; | |
3500 | } | |
3501 | ||
3502 | if (rx->u.rx.status->flag & RX_FLAG_RADIOTAP) | |
3503 | skb_pull(rx->skb, ieee80211_get_radiotap_len(rx->skb)); | |
3504 | ||
3505 | return TXRX_CONTINUE; | |
3506 | } | |
3507 | ||
3508 | ||
3509 | static ieee80211_txrx_result | |
3510 | ieee80211_rx_h_check(struct ieee80211_txrx_data *rx) | |
3511 | { | |
3512 | struct ieee80211_hdr *hdr; | |
3513 | int always_sta_key; | |
3514 | hdr = (struct ieee80211_hdr *) rx->skb->data; | |
3515 | ||
3516 | /* Drop duplicate 802.11 retransmissions (IEEE 802.11 Chap. 9.2.9) */ | |
3517 | if (rx->sta && !is_multicast_ether_addr(hdr->addr1)) { | |
3518 | if (unlikely(rx->fc & IEEE80211_FCTL_RETRY && | |
3519 | rx->sta->last_seq_ctrl[rx->u.rx.queue] == | |
3520 | hdr->seq_ctrl)) { | |
3521 | if (rx->u.rx.ra_match) { | |
3522 | rx->local->dot11FrameDuplicateCount++; | |
3523 | rx->sta->num_duplicates++; | |
3524 | } | |
3525 | return TXRX_DROP; | |
3526 | } else | |
3527 | rx->sta->last_seq_ctrl[rx->u.rx.queue] = hdr->seq_ctrl; | |
3528 | } | |
3529 | ||
3530 | if ((rx->local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) && | |
3531 | rx->skb->len > FCS_LEN) | |
3532 | skb_trim(rx->skb, rx->skb->len - FCS_LEN); | |
3533 | ||
3534 | if (unlikely(rx->skb->len < 16)) { | |
3535 | I802_DEBUG_INC(rx->local->rx_handlers_drop_short); | |
3536 | return TXRX_DROP; | |
3537 | } | |
3538 | ||
3539 | if (!rx->u.rx.ra_match) | |
3540 | rx->skb->pkt_type = PACKET_OTHERHOST; | |
3541 | else if (compare_ether_addr(rx->dev->dev_addr, hdr->addr1) == 0) | |
3542 | rx->skb->pkt_type = PACKET_HOST; | |
3543 | else if (is_multicast_ether_addr(hdr->addr1)) { | |
3544 | if (is_broadcast_ether_addr(hdr->addr1)) | |
3545 | rx->skb->pkt_type = PACKET_BROADCAST; | |
3546 | else | |
3547 | rx->skb->pkt_type = PACKET_MULTICAST; | |
3548 | } else | |
3549 | rx->skb->pkt_type = PACKET_OTHERHOST; | |
3550 | ||
3551 | /* Drop disallowed frame classes based on STA auth/assoc state; | |
3552 | * IEEE 802.11, Chap 5.5. | |
3553 | * | |
3554 | * 80211.o does filtering only based on association state, i.e., it | |
3555 | * drops Class 3 frames from not associated stations. hostapd sends | |
3556 | * deauth/disassoc frames when needed. In addition, hostapd is | |
3557 | * responsible for filtering on both auth and assoc states. | |
3558 | */ | |
3559 | if (unlikely(((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA || | |
3560 | ((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL && | |
3561 | (rx->fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PSPOLL)) && | |
3562 | rx->sdata->type != IEEE80211_IF_TYPE_IBSS && | |
3563 | (!rx->sta || !(rx->sta->flags & WLAN_STA_ASSOC)))) { | |
3564 | if ((!(rx->fc & IEEE80211_FCTL_FROMDS) && | |
3565 | !(rx->fc & IEEE80211_FCTL_TODS) && | |
3566 | (rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) | |
3567 | || !rx->u.rx.ra_match) { | |
3568 | /* Drop IBSS frames and frames for other hosts | |
3569 | * silently. */ | |
3570 | return TXRX_DROP; | |
3571 | } | |
3572 | ||
3573 | if (!rx->local->apdev) | |
3574 | return TXRX_DROP; | |
3575 | ||
3576 | ieee80211_rx_mgmt(rx->local, rx->skb, rx->u.rx.status, | |
3577 | ieee80211_msg_sta_not_assoc); | |
3578 | return TXRX_QUEUED; | |
3579 | } | |
3580 | ||
3581 | if (rx->sdata->type == IEEE80211_IF_TYPE_STA) | |
3582 | always_sta_key = 0; | |
3583 | else | |
3584 | always_sta_key = 1; | |
3585 | ||
3586 | if (rx->sta && rx->sta->key && always_sta_key) { | |
3587 | rx->key = rx->sta->key; | |
3588 | } else { | |
3589 | if (rx->sta && rx->sta->key) | |
3590 | rx->key = rx->sta->key; | |
3591 | else | |
3592 | rx->key = rx->sdata->default_key; | |
3593 | ||
3594 | if ((rx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) && | |
3595 | rx->fc & IEEE80211_FCTL_PROTECTED) { | |
3596 | int keyidx = ieee80211_wep_get_keyidx(rx->skb); | |
3597 | ||
3598 | if (keyidx >= 0 && keyidx < NUM_DEFAULT_KEYS && | |
3599 | (!rx->sta || !rx->sta->key || keyidx > 0)) | |
3600 | rx->key = rx->sdata->keys[keyidx]; | |
3601 | ||
3602 | if (!rx->key) { | |
3603 | if (!rx->u.rx.ra_match) | |
3604 | return TXRX_DROP; | |
3605 | printk(KERN_DEBUG "%s: RX WEP frame with " | |
3606 | "unknown keyidx %d (A1=" MAC_FMT " A2=" | |
3607 | MAC_FMT " A3=" MAC_FMT ")\n", | |
3608 | rx->dev->name, keyidx, | |
3609 | MAC_ARG(hdr->addr1), | |
3610 | MAC_ARG(hdr->addr2), | |
3611 | MAC_ARG(hdr->addr3)); | |
3612 | if (!rx->local->apdev) | |
3613 | return TXRX_DROP; | |
3614 | ieee80211_rx_mgmt( | |
3615 | rx->local, rx->skb, rx->u.rx.status, | |
3616 | ieee80211_msg_wep_frame_unknown_key); | |
3617 | return TXRX_QUEUED; | |
3618 | } | |
3619 | } | |
3620 | } | |
3621 | ||
3622 | if (rx->fc & IEEE80211_FCTL_PROTECTED && rx->key && rx->u.rx.ra_match) { | |
3623 | rx->key->tx_rx_count++; | |
3624 | if (unlikely(rx->local->key_tx_rx_threshold && | |
3625 | rx->key->tx_rx_count > | |
3626 | rx->local->key_tx_rx_threshold)) { | |
3627 | ieee80211_key_threshold_notify(rx->dev, rx->key, | |
3628 | rx->sta); | |
3629 | } | |
3630 | } | |
3631 | ||
3632 | return TXRX_CONTINUE; | |
3633 | } | |
3634 | ||
3635 | ||
3636 | static ieee80211_txrx_result | |
3637 | ieee80211_rx_h_sta_process(struct ieee80211_txrx_data *rx) | |
3638 | { | |
3639 | struct sta_info *sta = rx->sta; | |
3640 | struct net_device *dev = rx->dev; | |
3641 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) rx->skb->data; | |
3642 | ||
3643 | if (!sta) | |
3644 | return TXRX_CONTINUE; | |
3645 | ||
3646 | /* Update last_rx only for IBSS packets which are for the current | |
3647 | * BSSID to avoid keeping the current IBSS network alive in cases where | |
3648 | * other STAs are using different BSSID. */ | |
3649 | if (rx->sdata->type == IEEE80211_IF_TYPE_IBSS) { | |
3650 | u8 *bssid = ieee80211_get_bssid(hdr, rx->skb->len); | |
3651 | if (compare_ether_addr(bssid, rx->sdata->u.sta.bssid) == 0) | |
3652 | sta->last_rx = jiffies; | |
3653 | } else | |
3654 | if (!is_multicast_ether_addr(hdr->addr1) || | |
3655 | rx->sdata->type == IEEE80211_IF_TYPE_STA) { | |
3656 | /* Update last_rx only for unicast frames in order to prevent | |
3657 | * the Probe Request frames (the only broadcast frames from a | |
3658 | * STA in infrastructure mode) from keeping a connection alive. | |
3659 | */ | |
3660 | sta->last_rx = jiffies; | |
3661 | } | |
3662 | ||
3663 | if (!rx->u.rx.ra_match) | |
3664 | return TXRX_CONTINUE; | |
3665 | ||
3666 | sta->rx_fragments++; | |
3667 | sta->rx_bytes += rx->skb->len; | |
3668 | sta->last_rssi = (sta->last_rssi * 15 + | |
3669 | rx->u.rx.status->ssi) / 16; | |
3670 | sta->last_signal = (sta->last_signal * 15 + | |
3671 | rx->u.rx.status->signal) / 16; | |
3672 | sta->last_noise = (sta->last_noise * 15 + | |
3673 | rx->u.rx.status->noise) / 16; | |
3674 | ||
3675 | if (!(rx->fc & IEEE80211_FCTL_MOREFRAGS)) { | |
3676 | /* Change STA power saving mode only in the end of a frame | |
3677 | * exchange sequence */ | |
3678 | if ((sta->flags & WLAN_STA_PS) && !(rx->fc & IEEE80211_FCTL_PM)) | |
3679 | rx->u.rx.sent_ps_buffered += ap_sta_ps_end(dev, sta); | |
3680 | else if (!(sta->flags & WLAN_STA_PS) && | |
3681 | (rx->fc & IEEE80211_FCTL_PM)) | |
3682 | ap_sta_ps_start(dev, sta); | |
3683 | } | |
3684 | ||
3685 | /* Drop data::nullfunc frames silently, since they are used only to | |
3686 | * control station power saving mode. */ | |
3687 | if ((rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA && | |
3688 | (rx->fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_NULLFUNC) { | |
3689 | I802_DEBUG_INC(rx->local->rx_handlers_drop_nullfunc); | |
3690 | /* Update counter and free packet here to avoid counting this | |
3691 | * as a dropped packed. */ | |
3692 | sta->rx_packets++; | |
3693 | dev_kfree_skb(rx->skb); | |
3694 | return TXRX_QUEUED; | |
3695 | } | |
3696 | ||
3697 | return TXRX_CONTINUE; | |
3698 | } /* ieee80211_rx_h_sta_process */ | |
3699 | ||
3700 | ||
3701 | static ieee80211_txrx_result | |
3702 | ieee80211_rx_h_wep_weak_iv_detection(struct ieee80211_txrx_data *rx) | |
3703 | { | |
3704 | if (!rx->sta || !(rx->fc & IEEE80211_FCTL_PROTECTED) || | |
3705 | (rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA || | |
3706 | !rx->key || rx->key->alg != ALG_WEP || !rx->u.rx.ra_match) | |
3707 | return TXRX_CONTINUE; | |
3708 | ||
3709 | /* Check for weak IVs, if hwaccel did not remove IV from the frame */ | |
3710 | if ((rx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) || | |
3711 | rx->key->force_sw_encrypt) { | |
3712 | u8 *iv = ieee80211_wep_is_weak_iv(rx->skb, rx->key); | |
3713 | if (iv) { | |
3714 | rx->sta->wep_weak_iv_count++; | |
3715 | } | |
3716 | } | |
3717 | ||
3718 | return TXRX_CONTINUE; | |
3719 | } | |
3720 | ||
3721 | ||
3722 | static ieee80211_txrx_result | |
3723 | ieee80211_rx_h_wep_decrypt(struct ieee80211_txrx_data *rx) | |
3724 | { | |
3725 | /* If the device handles decryption totally, skip this test */ | |
3726 | if (rx->local->hw.flags & IEEE80211_HW_DEVICE_HIDES_WEP) | |
3727 | return TXRX_CONTINUE; | |
3728 | ||
3729 | if ((rx->key && rx->key->alg != ALG_WEP) || | |
3730 | !(rx->fc & IEEE80211_FCTL_PROTECTED) || | |
3731 | ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA && | |
3732 | ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT || | |
3733 | (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_AUTH))) | |
3734 | return TXRX_CONTINUE; | |
3735 | ||
3736 | if (!rx->key) { | |
3737 | printk(KERN_DEBUG "%s: RX WEP frame, but no key set\n", | |
3738 | rx->dev->name); | |
3739 | return TXRX_DROP; | |
3740 | } | |
3741 | ||
3742 | if (!(rx->u.rx.status->flag & RX_FLAG_DECRYPTED) || | |
3743 | rx->key->force_sw_encrypt) { | |
3744 | if (ieee80211_wep_decrypt(rx->local, rx->skb, rx->key)) { | |
3745 | printk(KERN_DEBUG "%s: RX WEP frame, decrypt " | |
3746 | "failed\n", rx->dev->name); | |
3747 | return TXRX_DROP; | |
3748 | } | |
3749 | } else if (rx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) { | |
3750 | ieee80211_wep_remove_iv(rx->local, rx->skb, rx->key); | |
3751 | /* remove ICV */ | |
3752 | skb_trim(rx->skb, rx->skb->len - 4); | |
3753 | } | |
3754 | ||
3755 | return TXRX_CONTINUE; | |
3756 | } | |
3757 | ||
3758 | ||
3759 | static ieee80211_txrx_result | |
3760 | ieee80211_rx_h_802_1x_pae(struct ieee80211_txrx_data *rx) | |
3761 | { | |
3762 | if (rx->sdata->eapol && ieee80211_is_eapol(rx->skb) && | |
3763 | rx->sdata->type != IEEE80211_IF_TYPE_STA && rx->u.rx.ra_match) { | |
3764 | /* Pass both encrypted and unencrypted EAPOL frames to user | |
3765 | * space for processing. */ | |
3766 | if (!rx->local->apdev) | |
3767 | return TXRX_DROP; | |
3768 | ieee80211_rx_mgmt(rx->local, rx->skb, rx->u.rx.status, | |
3769 | ieee80211_msg_normal); | |
3770 | return TXRX_QUEUED; | |
3771 | } | |
3772 | ||
3773 | if (unlikely(rx->sdata->ieee802_1x && | |
3774 | (rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA && | |
3775 | (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_NULLFUNC && | |
3776 | (!rx->sta || !(rx->sta->flags & WLAN_STA_AUTHORIZED)) && | |
3777 | !ieee80211_is_eapol(rx->skb))) { | |
3778 | #ifdef CONFIG_MAC80211_DEBUG | |
3779 | struct ieee80211_hdr *hdr = | |
3780 | (struct ieee80211_hdr *) rx->skb->data; | |
3781 | printk(KERN_DEBUG "%s: dropped frame from " MAC_FMT | |
3782 | " (unauthorized port)\n", rx->dev->name, | |
3783 | MAC_ARG(hdr->addr2)); | |
3784 | #endif /* CONFIG_MAC80211_DEBUG */ | |
3785 | return TXRX_DROP; | |
3786 | } | |
3787 | ||
3788 | return TXRX_CONTINUE; | |
3789 | } | |
3790 | ||
3791 | ||
3792 | static ieee80211_txrx_result | |
3793 | ieee80211_rx_h_drop_unencrypted(struct ieee80211_txrx_data *rx) | |
3794 | { | |
3795 | /* If the device handles decryption totally, skip this test */ | |
3796 | if (rx->local->hw.flags & IEEE80211_HW_DEVICE_HIDES_WEP) | |
3797 | return TXRX_CONTINUE; | |
3798 | ||
3799 | /* Drop unencrypted frames if key is set. */ | |
3800 | if (unlikely(!(rx->fc & IEEE80211_FCTL_PROTECTED) && | |
3801 | (rx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA && | |
3802 | (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_NULLFUNC && | |
3803 | (rx->key || rx->sdata->drop_unencrypted) && | |
3804 | (rx->sdata->eapol == 0 || | |
3805 | !ieee80211_is_eapol(rx->skb)))) { | |
3806 | printk(KERN_DEBUG "%s: RX non-WEP frame, but expected " | |
3807 | "encryption\n", rx->dev->name); | |
3808 | return TXRX_DROP; | |
3809 | } | |
3810 | return TXRX_CONTINUE; | |
3811 | } | |
3812 | ||
3813 | ||
3814 | static ieee80211_txrx_result | |
3815 | ieee80211_rx_h_mgmt(struct ieee80211_txrx_data *rx) | |
3816 | { | |
3817 | struct ieee80211_sub_if_data *sdata; | |
3818 | ||
3819 | if (!rx->u.rx.ra_match) | |
3820 | return TXRX_DROP; | |
3821 | ||
3822 | sdata = IEEE80211_DEV_TO_SUB_IF(rx->dev); | |
3823 | if ((sdata->type == IEEE80211_IF_TYPE_STA || | |
3824 | sdata->type == IEEE80211_IF_TYPE_IBSS) && | |
3825 | !rx->local->user_space_mlme) { | |
3826 | ieee80211_sta_rx_mgmt(rx->dev, rx->skb, rx->u.rx.status); | |
3827 | } else { | |
3828 | /* Management frames are sent to hostapd for processing */ | |
3829 | if (!rx->local->apdev) | |
3830 | return TXRX_DROP; | |
3831 | ieee80211_rx_mgmt(rx->local, rx->skb, rx->u.rx.status, | |
3832 | ieee80211_msg_normal); | |
3833 | } | |
3834 | return TXRX_QUEUED; | |
3835 | } | |
3836 | ||
3837 | ||
3838 | static ieee80211_txrx_result | |
3839 | ieee80211_rx_h_passive_scan(struct ieee80211_txrx_data *rx) | |
3840 | { | |
3841 | struct ieee80211_local *local = rx->local; | |
3842 | struct sk_buff *skb = rx->skb; | |
3843 | ||
3844 | if (unlikely(local->sta_scanning != 0)) { | |
3845 | ieee80211_sta_rx_scan(rx->dev, skb, rx->u.rx.status); | |
3846 | return TXRX_QUEUED; | |
3847 | } | |
3848 | ||
3849 | if (unlikely(rx->u.rx.in_scan)) { | |
3850 | /* scanning finished during invoking of handlers */ | |
3851 | I802_DEBUG_INC(local->rx_handlers_drop_passive_scan); | |
3852 | return TXRX_DROP; | |
3853 | } | |
3854 | ||
3855 | return TXRX_CONTINUE; | |
3856 | } | |
3857 | ||
3858 | ||
3859 | static void ieee80211_rx_michael_mic_report(struct net_device *dev, | |
3860 | struct ieee80211_hdr *hdr, | |
3861 | struct sta_info *sta, | |
3862 | struct ieee80211_txrx_data *rx) | |
3863 | { | |
3864 | int keyidx, hdrlen; | |
3865 | ||
3866 | hdrlen = ieee80211_get_hdrlen_from_skb(rx->skb); | |
3867 | if (rx->skb->len >= hdrlen + 4) | |
3868 | keyidx = rx->skb->data[hdrlen + 3] >> 6; | |
3869 | else | |
3870 | keyidx = -1; | |
3871 | ||
3872 | /* TODO: verify that this is not triggered by fragmented | |
3873 | * frames (hw does not verify MIC for them). */ | |
3874 | printk(KERN_DEBUG "%s: TKIP hwaccel reported Michael MIC " | |
3875 | "failure from " MAC_FMT " to " MAC_FMT " keyidx=%d\n", | |
3876 | dev->name, MAC_ARG(hdr->addr2), MAC_ARG(hdr->addr1), keyidx); | |
3877 | ||
3878 | if (!sta) { | |
3879 | /* Some hardware versions seem to generate incorrect | |
3880 | * Michael MIC reports; ignore them to avoid triggering | |
3881 | * countermeasures. */ | |
3882 | printk(KERN_DEBUG "%s: ignored spurious Michael MIC " | |
3883 | "error for unknown address " MAC_FMT "\n", | |
3884 | dev->name, MAC_ARG(hdr->addr2)); | |
3885 | goto ignore; | |
3886 | } | |
3887 | ||
3888 | if (!(rx->fc & IEEE80211_FCTL_PROTECTED)) { | |
3889 | printk(KERN_DEBUG "%s: ignored spurious Michael MIC " | |
3890 | "error for a frame with no ISWEP flag (src " | |
3891 | MAC_FMT ")\n", dev->name, MAC_ARG(hdr->addr2)); | |
3892 | goto ignore; | |
3893 | } | |
3894 | ||
3895 | if ((rx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) && | |
3896 | rx->sdata->type == IEEE80211_IF_TYPE_AP) { | |
3897 | keyidx = ieee80211_wep_get_keyidx(rx->skb); | |
3898 | /* AP with Pairwise keys support should never receive Michael | |
3899 | * MIC errors for non-zero keyidx because these are reserved | |
3900 | * for group keys and only the AP is sending real multicast | |
3901 | * frames in BSS. */ | |
3902 | if (keyidx) { | |
3903 | printk(KERN_DEBUG "%s: ignored Michael MIC error for " | |
3904 | "a frame with non-zero keyidx (%d) (src " MAC_FMT | |
3905 | ")\n", dev->name, keyidx, MAC_ARG(hdr->addr2)); | |
3906 | goto ignore; | |
3907 | } | |
3908 | } | |
3909 | ||
3910 | if ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA && | |
3911 | ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT || | |
3912 | (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_AUTH)) { | |
3913 | printk(KERN_DEBUG "%s: ignored spurious Michael MIC " | |
3914 | "error for a frame that cannot be encrypted " | |
3915 | "(fc=0x%04x) (src " MAC_FMT ")\n", | |
3916 | dev->name, rx->fc, MAC_ARG(hdr->addr2)); | |
3917 | goto ignore; | |
3918 | } | |
3919 | ||
3920 | do { | |
3921 | union iwreq_data wrqu; | |
3922 | char *buf = kmalloc(128, GFP_ATOMIC); | |
3923 | if (!buf) | |
3924 | break; | |
3925 | ||
3926 | /* TODO: needed parameters: count, key type, TSC */ | |
3927 | sprintf(buf, "MLME-MICHAELMICFAILURE.indication(" | |
3928 | "keyid=%d %scast addr=" MAC_FMT ")", | |
3929 | keyidx, hdr->addr1[0] & 0x01 ? "broad" : "uni", | |
3930 | MAC_ARG(hdr->addr2)); | |
3931 | memset(&wrqu, 0, sizeof(wrqu)); | |
3932 | wrqu.data.length = strlen(buf); | |
3933 | wireless_send_event(rx->dev, IWEVCUSTOM, &wrqu, buf); | |
3934 | kfree(buf); | |
3935 | } while (0); | |
3936 | ||
3937 | /* TODO: consider verifying the MIC error report with software | |
3938 | * implementation if we get too many spurious reports from the | |
3939 | * hardware. */ | |
3940 | if (!rx->local->apdev) | |
3941 | goto ignore; | |
3942 | ieee80211_rx_mgmt(rx->local, rx->skb, rx->u.rx.status, | |
3943 | ieee80211_msg_michael_mic_failure); | |
3944 | return; | |
3945 | ||
3946 | ignore: | |
3947 | dev_kfree_skb(rx->skb); | |
3948 | rx->skb = NULL; | |
3949 | } | |
3950 | ||
3951 | static inline ieee80211_txrx_result __ieee80211_invoke_rx_handlers( | |
3952 | struct ieee80211_local *local, | |
3953 | ieee80211_rx_handler *handlers, | |
3954 | struct ieee80211_txrx_data *rx, | |
3955 | struct sta_info *sta) | |
3956 | { | |
3957 | ieee80211_rx_handler *handler; | |
3958 | ieee80211_txrx_result res = TXRX_DROP; | |
3959 | ||
3960 | for (handler = handlers; *handler != NULL; handler++) { | |
3961 | res = (*handler)(rx); | |
3962 | if (res != TXRX_CONTINUE) { | |
3963 | if (res == TXRX_DROP) { | |
3964 | I802_DEBUG_INC(local->rx_handlers_drop); | |
3965 | if (sta) | |
3966 | sta->rx_dropped++; | |
3967 | } | |
3968 | if (res == TXRX_QUEUED) | |
3969 | I802_DEBUG_INC(local->rx_handlers_queued); | |
3970 | break; | |
3971 | } | |
3972 | } | |
3973 | ||
3974 | if (res == TXRX_DROP) { | |
3975 | dev_kfree_skb(rx->skb); | |
3976 | } | |
3977 | return res; | |
3978 | } | |
3979 | ||
3980 | static inline void ieee80211_invoke_rx_handlers(struct ieee80211_local *local, | |
3981 | ieee80211_rx_handler *handlers, | |
3982 | struct ieee80211_txrx_data *rx, | |
3983 | struct sta_info *sta) | |
3984 | { | |
3985 | if (__ieee80211_invoke_rx_handlers(local, handlers, rx, sta) == | |
3986 | TXRX_CONTINUE) | |
3987 | dev_kfree_skb(rx->skb); | |
3988 | } | |
3989 | ||
3990 | /* | |
3991 | * This is the receive path handler. It is called by a low level driver when an | |
3992 | * 802.11 MPDU is received from the hardware. | |
3993 | */ | |
3994 | void __ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb, | |
3995 | struct ieee80211_rx_status *status) | |
3996 | { | |
3997 | struct ieee80211_local *local = hw_to_local(hw); | |
3998 | struct ieee80211_sub_if_data *sdata; | |
3999 | struct sta_info *sta; | |
4000 | struct ieee80211_hdr *hdr; | |
4001 | struct ieee80211_txrx_data rx; | |
4002 | u16 type; | |
4003 | int multicast; | |
4004 | int radiotap_len = 0; | |
4005 | ||
4006 | if (status->flag & RX_FLAG_RADIOTAP) { | |
4007 | radiotap_len = ieee80211_get_radiotap_len(skb); | |
4008 | skb_pull(skb, radiotap_len); | |
4009 | } | |
4010 | ||
4011 | hdr = (struct ieee80211_hdr *) skb->data; | |
4012 | memset(&rx, 0, sizeof(rx)); | |
4013 | rx.skb = skb; | |
4014 | rx.local = local; | |
4015 | ||
4016 | rx.u.rx.status = status; | |
4017 | rx.fc = skb->len >= 2 ? le16_to_cpu(hdr->frame_control) : 0; | |
4018 | type = rx.fc & IEEE80211_FCTL_FTYPE; | |
4019 | if (type == IEEE80211_FTYPE_DATA || type == IEEE80211_FTYPE_MGMT) | |
4020 | local->dot11ReceivedFragmentCount++; | |
4021 | multicast = is_multicast_ether_addr(hdr->addr1); | |
4022 | ||
4023 | if (skb->len >= 16) | |
4024 | sta = rx.sta = sta_info_get(local, hdr->addr2); | |
4025 | else | |
4026 | sta = rx.sta = NULL; | |
4027 | ||
4028 | if (sta) { | |
4029 | rx.dev = sta->dev; | |
4030 | rx.sdata = IEEE80211_DEV_TO_SUB_IF(rx.dev); | |
4031 | } | |
4032 | ||
4033 | if ((status->flag & RX_FLAG_MMIC_ERROR)) { | |
4034 | ieee80211_rx_michael_mic_report(local->mdev, hdr, sta, &rx); | |
4035 | goto end; | |
4036 | } | |
4037 | ||
4038 | if (unlikely(local->sta_scanning)) | |
4039 | rx.u.rx.in_scan = 1; | |
4040 | ||
4041 | if (__ieee80211_invoke_rx_handlers(local, local->rx_pre_handlers, &rx, | |
4042 | sta) != TXRX_CONTINUE) | |
4043 | goto end; | |
4044 | skb = rx.skb; | |
4045 | ||
4046 | skb_push(skb, radiotap_len); | |
4047 | if (sta && !sta->assoc_ap && !(sta->flags & WLAN_STA_WDS) && | |
4048 | !local->iff_promiscs && !multicast) { | |
4049 | rx.u.rx.ra_match = 1; | |
4050 | ieee80211_invoke_rx_handlers(local, local->rx_handlers, &rx, | |
4051 | sta); | |
4052 | } else { | |
4053 | struct ieee80211_sub_if_data *prev = NULL; | |
4054 | struct sk_buff *skb_new; | |
4055 | u8 *bssid = ieee80211_get_bssid(hdr, skb->len - radiotap_len); | |
4056 | ||
4057 | read_lock(&local->sub_if_lock); | |
4058 | list_for_each_entry(sdata, &local->sub_if_list, list) { | |
4059 | rx.u.rx.ra_match = 1; | |
4060 | switch (sdata->type) { | |
4061 | case IEEE80211_IF_TYPE_STA: | |
4062 | if (!bssid) | |
4063 | continue; | |
4064 | if (!ieee80211_bssid_match(bssid, | |
4065 | sdata->u.sta.bssid)) { | |
4066 | if (!rx.u.rx.in_scan) | |
4067 | continue; | |
4068 | rx.u.rx.ra_match = 0; | |
4069 | } else if (!multicast && | |
4070 | compare_ether_addr(sdata->dev->dev_addr, | |
4071 | hdr->addr1) != 0) { | |
4072 | if (!sdata->promisc) | |
4073 | continue; | |
4074 | rx.u.rx.ra_match = 0; | |
4075 | } | |
4076 | break; | |
4077 | case IEEE80211_IF_TYPE_IBSS: | |
4078 | if (!bssid) | |
4079 | continue; | |
4080 | if (!ieee80211_bssid_match(bssid, | |
4081 | sdata->u.sta.bssid)) { | |
4082 | if (!rx.u.rx.in_scan) | |
4083 | continue; | |
4084 | rx.u.rx.ra_match = 0; | |
4085 | } else if (!multicast && | |
4086 | compare_ether_addr(sdata->dev->dev_addr, | |
4087 | hdr->addr1) != 0) { | |
4088 | if (!sdata->promisc) | |
4089 | continue; | |
4090 | rx.u.rx.ra_match = 0; | |
4091 | } else if (!sta) | |
4092 | sta = rx.sta = | |
4093 | ieee80211_ibss_add_sta(sdata->dev, | |
4094 | skb, bssid, | |
4095 | hdr->addr2); | |
4096 | break; | |
4097 | case IEEE80211_IF_TYPE_AP: | |
4098 | if (!bssid) { | |
4099 | if (compare_ether_addr(sdata->dev->dev_addr, | |
4100 | hdr->addr1) != 0) | |
4101 | continue; | |
4102 | } else if (!ieee80211_bssid_match(bssid, | |
4103 | sdata->dev->dev_addr)) { | |
4104 | if (!rx.u.rx.in_scan) | |
4105 | continue; | |
4106 | rx.u.rx.ra_match = 0; | |
4107 | } | |
4108 | if (sdata->dev == local->mdev && | |
4109 | !rx.u.rx.in_scan) | |
4110 | /* do not receive anything via | |
4111 | * master device when not scanning */ | |
4112 | continue; | |
4113 | break; | |
4114 | case IEEE80211_IF_TYPE_WDS: | |
4115 | if (bssid || | |
4116 | (rx.fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) | |
4117 | continue; | |
4118 | if (compare_ether_addr(sdata->u.wds.remote_addr, | |
4119 | hdr->addr2) != 0) | |
4120 | continue; | |
4121 | break; | |
4122 | } | |
4123 | ||
4124 | if (prev) { | |
4125 | skb_new = skb_copy(skb, GFP_ATOMIC); | |
4126 | if (!skb_new) { | |
4127 | if (net_ratelimit()) | |
4128 | printk(KERN_DEBUG "%s: failed to copy " | |
4129 | "multicast frame for %s", | |
4130 | local->mdev->name, prev->dev->name); | |
4131 | continue; | |
4132 | } | |
4133 | rx.skb = skb_new; | |
4134 | rx.dev = prev->dev; | |
4135 | rx.sdata = prev; | |
4136 | ieee80211_invoke_rx_handlers(local, | |
4137 | local->rx_handlers, | |
4138 | &rx, sta); | |
4139 | } | |
4140 | prev = sdata; | |
4141 | } | |
4142 | if (prev) { | |
4143 | rx.skb = skb; | |
4144 | rx.dev = prev->dev; | |
4145 | rx.sdata = prev; | |
4146 | ieee80211_invoke_rx_handlers(local, local->rx_handlers, | |
4147 | &rx, sta); | |
4148 | } else | |
4149 | dev_kfree_skb(skb); | |
4150 | read_unlock(&local->sub_if_lock); | |
4151 | } | |
4152 | ||
4153 | end: | |
4154 | if (sta) | |
4155 | sta_info_put(sta); | |
4156 | } | |
4157 | EXPORT_SYMBOL(__ieee80211_rx); | |
4158 | ||
4159 | static ieee80211_txrx_result | |
4160 | ieee80211_tx_h_load_stats(struct ieee80211_txrx_data *tx) | |
4161 | { | |
4162 | struct ieee80211_local *local = tx->local; | |
4163 | struct ieee80211_hw_mode *mode = tx->u.tx.mode; | |
4164 | struct sk_buff *skb = tx->skb; | |
4165 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
4166 | u32 load = 0, hdrtime; | |
4167 | ||
4168 | /* TODO: this could be part of tx_status handling, so that the number | |
4169 | * of retries would be known; TX rate should in that case be stored | |
4170 | * somewhere with the packet */ | |
4171 | ||
4172 | /* Estimate total channel use caused by this frame */ | |
4173 | ||
4174 | /* 1 bit at 1 Mbit/s takes 1 usec; in channel_use values, | |
4175 | * 1 usec = 1/8 * (1080 / 10) = 13.5 */ | |
4176 | ||
4177 | if (mode->mode == MODE_IEEE80211A || | |
4178 | mode->mode == MODE_ATHEROS_TURBO || | |
4179 | mode->mode == MODE_ATHEROS_TURBOG || | |
4180 | (mode->mode == MODE_IEEE80211G && | |
4181 | tx->u.tx.rate->flags & IEEE80211_RATE_ERP)) | |
4182 | hdrtime = CHAN_UTIL_HDR_SHORT; | |
4183 | else | |
4184 | hdrtime = CHAN_UTIL_HDR_LONG; | |
4185 | ||
4186 | load = hdrtime; | |
4187 | if (!is_multicast_ether_addr(hdr->addr1)) | |
4188 | load += hdrtime; | |
4189 | ||
4190 | if (tx->u.tx.control->flags & IEEE80211_TXCTL_USE_RTS_CTS) | |
4191 | load += 2 * hdrtime; | |
4192 | else if (tx->u.tx.control->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) | |
4193 | load += hdrtime; | |
4194 | ||
4195 | load += skb->len * tx->u.tx.rate->rate_inv; | |
4196 | ||
4197 | if (tx->u.tx.extra_frag) { | |
4198 | int i; | |
4199 | for (i = 0; i < tx->u.tx.num_extra_frag; i++) { | |
4200 | load += 2 * hdrtime; | |
4201 | load += tx->u.tx.extra_frag[i]->len * | |
4202 | tx->u.tx.rate->rate; | |
4203 | } | |
4204 | } | |
4205 | ||
4206 | /* Divide channel_use by 8 to avoid wrapping around the counter */ | |
4207 | load >>= CHAN_UTIL_SHIFT; | |
4208 | local->channel_use_raw += load; | |
4209 | if (tx->sta) | |
4210 | tx->sta->channel_use_raw += load; | |
4211 | tx->sdata->channel_use_raw += load; | |
4212 | ||
4213 | return TXRX_CONTINUE; | |
4214 | } | |
4215 | ||
4216 | ||
4217 | static ieee80211_txrx_result | |
4218 | ieee80211_rx_h_load_stats(struct ieee80211_txrx_data *rx) | |
4219 | { | |
4220 | struct ieee80211_local *local = rx->local; | |
4221 | struct sk_buff *skb = rx->skb; | |
4222 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
4223 | u32 load = 0, hdrtime; | |
4224 | struct ieee80211_rate *rate; | |
4225 | struct ieee80211_hw_mode *mode = local->hw.conf.mode; | |
4226 | int i; | |
4227 | ||
4228 | /* Estimate total channel use caused by this frame */ | |
4229 | ||
4230 | if (unlikely(mode->num_rates < 0)) | |
4231 | return TXRX_CONTINUE; | |
4232 | ||
4233 | rate = &mode->rates[0]; | |
4234 | for (i = 0; i < mode->num_rates; i++) { | |
4235 | if (mode->rates[i].val == rx->u.rx.status->rate) { | |
4236 | rate = &mode->rates[i]; | |
4237 | break; | |
4238 | } | |
4239 | } | |
4240 | ||
4241 | /* 1 bit at 1 Mbit/s takes 1 usec; in channel_use values, | |
4242 | * 1 usec = 1/8 * (1080 / 10) = 13.5 */ | |
4243 | ||
4244 | if (mode->mode == MODE_IEEE80211A || | |
4245 | mode->mode == MODE_ATHEROS_TURBO || | |
4246 | mode->mode == MODE_ATHEROS_TURBOG || | |
4247 | (mode->mode == MODE_IEEE80211G && | |
4248 | rate->flags & IEEE80211_RATE_ERP)) | |
4249 | hdrtime = CHAN_UTIL_HDR_SHORT; | |
4250 | else | |
4251 | hdrtime = CHAN_UTIL_HDR_LONG; | |
4252 | ||
4253 | load = hdrtime; | |
4254 | if (!is_multicast_ether_addr(hdr->addr1)) | |
4255 | load += hdrtime; | |
4256 | ||
4257 | load += skb->len * rate->rate_inv; | |
4258 | ||
4259 | /* Divide channel_use by 8 to avoid wrapping around the counter */ | |
4260 | load >>= CHAN_UTIL_SHIFT; | |
4261 | local->channel_use_raw += load; | |
4262 | if (rx->sta) | |
4263 | rx->sta->channel_use_raw += load; | |
4264 | rx->u.rx.load = load; | |
4265 | ||
4266 | return TXRX_CONTINUE; | |
4267 | } | |
4268 | ||
4269 | static ieee80211_txrx_result | |
4270 | ieee80211_rx_h_if_stats(struct ieee80211_txrx_data *rx) | |
4271 | { | |
4272 | rx->sdata->channel_use_raw += rx->u.rx.load; | |
4273 | return TXRX_CONTINUE; | |
4274 | } | |
4275 | ||
4276 | static void ieee80211_stat_refresh(unsigned long data) | |
4277 | { | |
4278 | struct ieee80211_local *local = (struct ieee80211_local *) data; | |
4279 | struct sta_info *sta; | |
4280 | struct ieee80211_sub_if_data *sdata; | |
4281 | ||
4282 | if (!local->stat_time) | |
4283 | return; | |
4284 | ||
4285 | /* go through all stations */ | |
4286 | spin_lock_bh(&local->sta_lock); | |
4287 | list_for_each_entry(sta, &local->sta_list, list) { | |
4288 | sta->channel_use = (sta->channel_use_raw / local->stat_time) / | |
4289 | CHAN_UTIL_PER_10MS; | |
4290 | sta->channel_use_raw = 0; | |
4291 | } | |
4292 | spin_unlock_bh(&local->sta_lock); | |
4293 | ||
4294 | /* go through all subinterfaces */ | |
4295 | read_lock(&local->sub_if_lock); | |
4296 | list_for_each_entry(sdata, &local->sub_if_list, list) { | |
4297 | sdata->channel_use = (sdata->channel_use_raw / | |
4298 | local->stat_time) / CHAN_UTIL_PER_10MS; | |
4299 | sdata->channel_use_raw = 0; | |
4300 | } | |
4301 | read_unlock(&local->sub_if_lock); | |
4302 | ||
4303 | /* hardware interface */ | |
4304 | local->channel_use = (local->channel_use_raw / | |
4305 | local->stat_time) / CHAN_UTIL_PER_10MS; | |
4306 | local->channel_use_raw = 0; | |
4307 | ||
4308 | local->stat_timer.expires = jiffies + HZ * local->stat_time / 100; | |
4309 | add_timer(&local->stat_timer); | |
4310 | } | |
4311 | ||
4312 | ||
4313 | /* This is a version of the rx handler that can be called from hard irq | |
4314 | * context. Post the skb on the queue and schedule the tasklet */ | |
4315 | void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb, | |
4316 | struct ieee80211_rx_status *status) | |
4317 | { | |
4318 | struct ieee80211_local *local = hw_to_local(hw); | |
4319 | ||
4320 | BUILD_BUG_ON(sizeof(struct ieee80211_rx_status) > sizeof(skb->cb)); | |
4321 | ||
4322 | skb->dev = local->mdev; | |
4323 | /* copy status into skb->cb for use by tasklet */ | |
4324 | memcpy(skb->cb, status, sizeof(*status)); | |
4325 | skb->pkt_type = IEEE80211_RX_MSG; | |
4326 | skb_queue_tail(&local->skb_queue, skb); | |
4327 | tasklet_schedule(&local->tasklet); | |
4328 | } | |
4329 | EXPORT_SYMBOL(ieee80211_rx_irqsafe); | |
4330 | ||
4331 | void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, | |
4332 | struct sk_buff *skb, | |
4333 | struct ieee80211_tx_status *status) | |
4334 | { | |
4335 | struct ieee80211_local *local = hw_to_local(hw); | |
4336 | struct ieee80211_tx_status *saved; | |
4337 | int tmp; | |
4338 | ||
4339 | skb->dev = local->mdev; | |
4340 | saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC); | |
4341 | if (unlikely(!saved)) { | |
4342 | if (net_ratelimit()) | |
4343 | printk(KERN_WARNING "%s: Not enough memory, " | |
4344 | "dropping tx status", skb->dev->name); | |
4345 | /* should be dev_kfree_skb_irq, but due to this function being | |
4346 | * named _irqsafe instead of just _irq we can't be sure that | |
4347 | * people won't call it from non-irq contexts */ | |
4348 | dev_kfree_skb_any(skb); | |
4349 | return; | |
4350 | } | |
4351 | memcpy(saved, status, sizeof(struct ieee80211_tx_status)); | |
4352 | /* copy pointer to saved status into skb->cb for use by tasklet */ | |
4353 | memcpy(skb->cb, &saved, sizeof(saved)); | |
4354 | ||
4355 | skb->pkt_type = IEEE80211_TX_STATUS_MSG; | |
4356 | skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ? | |
4357 | &local->skb_queue : &local->skb_queue_unreliable, skb); | |
4358 | tmp = skb_queue_len(&local->skb_queue) + | |
4359 | skb_queue_len(&local->skb_queue_unreliable); | |
4360 | while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT && | |
4361 | (skb = skb_dequeue(&local->skb_queue_unreliable))) { | |
4362 | memcpy(&saved, skb->cb, sizeof(saved)); | |
4363 | kfree(saved); | |
4364 | dev_kfree_skb_irq(skb); | |
4365 | tmp--; | |
4366 | I802_DEBUG_INC(local->tx_status_drop); | |
4367 | } | |
4368 | tasklet_schedule(&local->tasklet); | |
4369 | } | |
4370 | EXPORT_SYMBOL(ieee80211_tx_status_irqsafe); | |
4371 | ||
4372 | static void ieee80211_tasklet_handler(unsigned long data) | |
4373 | { | |
4374 | struct ieee80211_local *local = (struct ieee80211_local *) data; | |
4375 | struct sk_buff *skb; | |
4376 | struct ieee80211_rx_status rx_status; | |
4377 | struct ieee80211_tx_status *tx_status; | |
4378 | ||
4379 | while ((skb = skb_dequeue(&local->skb_queue)) || | |
4380 | (skb = skb_dequeue(&local->skb_queue_unreliable))) { | |
4381 | switch (skb->pkt_type) { | |
4382 | case IEEE80211_RX_MSG: | |
4383 | /* status is in skb->cb */ | |
4384 | memcpy(&rx_status, skb->cb, sizeof(rx_status)); | |
4385 | /* Clear skb->type in order to not confuse kernel | |
4386 | * netstack. */ | |
4387 | skb->pkt_type = 0; | |
4388 | __ieee80211_rx(local_to_hw(local), skb, &rx_status); | |
4389 | break; | |
4390 | case IEEE80211_TX_STATUS_MSG: | |
4391 | /* get pointer to saved status out of skb->cb */ | |
4392 | memcpy(&tx_status, skb->cb, sizeof(tx_status)); | |
4393 | skb->pkt_type = 0; | |
4394 | ieee80211_tx_status(local_to_hw(local), | |
4395 | skb, tx_status); | |
4396 | kfree(tx_status); | |
4397 | break; | |
4398 | default: /* should never get here! */ | |
4399 | printk(KERN_ERR "%s: Unknown message type (%d)\n", | |
4400 | local->mdev->name, skb->pkt_type); | |
4401 | dev_kfree_skb(skb); | |
4402 | break; | |
4403 | } | |
4404 | } | |
4405 | } | |
4406 | ||
4407 | ||
4408 | /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to | |
4409 | * make a prepared TX frame (one that has been given to hw) to look like brand | |
4410 | * new IEEE 802.11 frame that is ready to go through TX processing again. | |
4411 | * Also, tx_packet_data in cb is restored from tx_control. */ | |
4412 | static void ieee80211_remove_tx_extra(struct ieee80211_local *local, | |
4413 | struct ieee80211_key *key, | |
4414 | struct sk_buff *skb, | |
4415 | struct ieee80211_tx_control *control) | |
4416 | { | |
4417 | int hdrlen, iv_len, mic_len; | |
4418 | struct ieee80211_tx_packet_data *pkt_data; | |
4419 | ||
4420 | pkt_data = (struct ieee80211_tx_packet_data *)skb->cb; | |
4421 | pkt_data->ifindex = control->ifindex; | |
4422 | pkt_data->mgmt_iface = (control->type == IEEE80211_IF_TYPE_MGMT); | |
4423 | pkt_data->req_tx_status = !!(control->flags & IEEE80211_TXCTL_REQ_TX_STATUS); | |
4424 | pkt_data->do_not_encrypt = !!(control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT); | |
4425 | pkt_data->requeue = !!(control->flags & IEEE80211_TXCTL_REQUEUE); | |
4426 | pkt_data->queue = control->queue; | |
4427 | ||
4428 | hdrlen = ieee80211_get_hdrlen_from_skb(skb); | |
4429 | ||
4430 | if (!key) | |
4431 | goto no_key; | |
4432 | ||
4433 | switch (key->alg) { | |
4434 | case ALG_WEP: | |
4435 | iv_len = WEP_IV_LEN; | |
4436 | mic_len = WEP_ICV_LEN; | |
4437 | break; | |
4438 | case ALG_TKIP: | |
4439 | iv_len = TKIP_IV_LEN; | |
4440 | mic_len = TKIP_ICV_LEN; | |
4441 | break; | |
4442 | case ALG_CCMP: | |
4443 | iv_len = CCMP_HDR_LEN; | |
4444 | mic_len = CCMP_MIC_LEN; | |
4445 | break; | |
4446 | default: | |
4447 | goto no_key; | |
4448 | } | |
4449 | ||
4450 | if (skb->len >= mic_len && key->force_sw_encrypt) | |
4451 | skb_trim(skb, skb->len - mic_len); | |
4452 | if (skb->len >= iv_len && skb->len > hdrlen) { | |
4453 | memmove(skb->data + iv_len, skb->data, hdrlen); | |
4454 | skb_pull(skb, iv_len); | |
4455 | } | |
4456 | ||
4457 | no_key: | |
4458 | { | |
4459 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
4460 | u16 fc = le16_to_cpu(hdr->frame_control); | |
4461 | if ((fc & 0x8C) == 0x88) /* QoS Control Field */ { | |
4462 | fc &= ~IEEE80211_STYPE_QOS_DATA; | |
4463 | hdr->frame_control = cpu_to_le16(fc); | |
4464 | memmove(skb->data + 2, skb->data, hdrlen - 2); | |
4465 | skb_pull(skb, 2); | |
4466 | } | |
4467 | } | |
4468 | } | |
4469 | ||
4470 | ||
4471 | void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb, | |
4472 | struct ieee80211_tx_status *status) | |
4473 | { | |
4474 | struct sk_buff *skb2; | |
4475 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
4476 | struct ieee80211_local *local = hw_to_local(hw); | |
4477 | u16 frag, type; | |
4478 | u32 msg_type; | |
b306f453 JB |
4479 | struct ieee80211_tx_status_rtap_hdr *rthdr; |
4480 | struct ieee80211_sub_if_data *sdata; | |
4481 | int monitors; | |
f0706e82 JB |
4482 | |
4483 | if (!status) { | |
4484 | printk(KERN_ERR | |
4485 | "%s: ieee80211_tx_status called with NULL status\n", | |
4486 | local->mdev->name); | |
4487 | dev_kfree_skb(skb); | |
4488 | return; | |
4489 | } | |
4490 | ||
4491 | if (status->excessive_retries) { | |
4492 | struct sta_info *sta; | |
4493 | sta = sta_info_get(local, hdr->addr1); | |
4494 | if (sta) { | |
4495 | if (sta->flags & WLAN_STA_PS) { | |
4496 | /* The STA is in power save mode, so assume | |
4497 | * that this TX packet failed because of that. | |
4498 | */ | |
4499 | status->excessive_retries = 0; | |
4500 | status->flags |= IEEE80211_TX_STATUS_TX_FILTERED; | |
4501 | } | |
4502 | sta_info_put(sta); | |
4503 | } | |
4504 | } | |
4505 | ||
4506 | if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) { | |
4507 | struct sta_info *sta; | |
4508 | sta = sta_info_get(local, hdr->addr1); | |
4509 | if (sta) { | |
4510 | sta->tx_filtered_count++; | |
4511 | ||
4512 | /* Clear the TX filter mask for this STA when sending | |
4513 | * the next packet. If the STA went to power save mode, | |
4514 | * this will happen when it is waking up for the next | |
4515 | * time. */ | |
4516 | sta->clear_dst_mask = 1; | |
4517 | ||
4518 | /* TODO: Is the WLAN_STA_PS flag always set here or is | |
4519 | * the race between RX and TX status causing some | |
4520 | * packets to be filtered out before 80211.o gets an | |
4521 | * update for PS status? This seems to be the case, so | |
4522 | * no changes are likely to be needed. */ | |
4523 | if (sta->flags & WLAN_STA_PS && | |
4524 | skb_queue_len(&sta->tx_filtered) < | |
4525 | STA_MAX_TX_BUFFER) { | |
4526 | ieee80211_remove_tx_extra(local, sta->key, | |
4527 | skb, | |
4528 | &status->control); | |
4529 | skb_queue_tail(&sta->tx_filtered, skb); | |
4530 | } else if (!(sta->flags & WLAN_STA_PS) && | |
4531 | !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) { | |
4532 | /* Software retry the packet once */ | |
4533 | status->control.flags |= IEEE80211_TXCTL_REQUEUE; | |
4534 | ieee80211_remove_tx_extra(local, sta->key, | |
4535 | skb, | |
4536 | &status->control); | |
4537 | dev_queue_xmit(skb); | |
4538 | } else { | |
4539 | if (net_ratelimit()) { | |
4540 | printk(KERN_DEBUG "%s: dropped TX " | |
4541 | "filtered frame queue_len=%d " | |
4542 | "PS=%d @%lu\n", | |
4543 | local->mdev->name, | |
4544 | skb_queue_len( | |
4545 | &sta->tx_filtered), | |
4546 | !!(sta->flags & WLAN_STA_PS), | |
4547 | jiffies); | |
4548 | } | |
4549 | dev_kfree_skb(skb); | |
4550 | } | |
4551 | sta_info_put(sta); | |
4552 | return; | |
4553 | } | |
4554 | } else { | |
4555 | /* FIXME: STUPID to call this with both local and local->mdev */ | |
4556 | rate_control_tx_status(local, local->mdev, skb, status); | |
4557 | } | |
4558 | ||
4559 | ieee80211_led_tx(local, 0); | |
4560 | ||
4561 | /* SNMP counters | |
4562 | * Fragments are passed to low-level drivers as separate skbs, so these | |
4563 | * are actually fragments, not frames. Update frame counters only for | |
4564 | * the first fragment of the frame. */ | |
4565 | ||
4566 | frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG; | |
4567 | type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE; | |
4568 | ||
4569 | if (status->flags & IEEE80211_TX_STATUS_ACK) { | |
4570 | if (frag == 0) { | |
4571 | local->dot11TransmittedFrameCount++; | |
4572 | if (is_multicast_ether_addr(hdr->addr1)) | |
4573 | local->dot11MulticastTransmittedFrameCount++; | |
4574 | if (status->retry_count > 0) | |
4575 | local->dot11RetryCount++; | |
4576 | if (status->retry_count > 1) | |
4577 | local->dot11MultipleRetryCount++; | |
4578 | } | |
4579 | ||
4580 | /* This counter shall be incremented for an acknowledged MPDU | |
4581 | * with an individual address in the address 1 field or an MPDU | |
4582 | * with a multicast address in the address 1 field of type Data | |
4583 | * or Management. */ | |
4584 | if (!is_multicast_ether_addr(hdr->addr1) || | |
4585 | type == IEEE80211_FTYPE_DATA || | |
4586 | type == IEEE80211_FTYPE_MGMT) | |
4587 | local->dot11TransmittedFragmentCount++; | |
4588 | } else { | |
4589 | if (frag == 0) | |
4590 | local->dot11FailedCount++; | |
4591 | } | |
4592 | ||
b306f453 JB |
4593 | msg_type = (status->flags & IEEE80211_TX_STATUS_ACK) ? |
4594 | ieee80211_msg_tx_callback_ack : ieee80211_msg_tx_callback_fail; | |
4595 | ||
4596 | /* this was a transmitted frame, but now we want to reuse it */ | |
4597 | skb_orphan(skb); | |
4598 | ||
4599 | if ((status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS) && | |
4600 | local->apdev) { | |
4601 | if (local->monitors) { | |
4602 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
4603 | } else { | |
4604 | skb2 = skb; | |
4605 | skb = NULL; | |
4606 | } | |
4607 | ||
4608 | if (skb2) | |
4609 | /* Send frame to hostapd */ | |
4610 | ieee80211_rx_mgmt(local, skb2, NULL, msg_type); | |
4611 | ||
4612 | if (!skb) | |
4613 | return; | |
4614 | } | |
4615 | ||
4616 | if (!local->monitors) { | |
f0706e82 JB |
4617 | dev_kfree_skb(skb); |
4618 | return; | |
4619 | } | |
4620 | ||
b306f453 | 4621 | /* send frame to monitor interfaces now */ |
f0706e82 | 4622 | |
b306f453 JB |
4623 | if (skb_headroom(skb) < sizeof(*rthdr)) { |
4624 | printk(KERN_ERR "ieee80211_tx_status: headroom too small\n"); | |
f0706e82 JB |
4625 | dev_kfree_skb(skb); |
4626 | return; | |
4627 | } | |
f0706e82 | 4628 | |
b306f453 JB |
4629 | rthdr = (struct ieee80211_tx_status_rtap_hdr*) |
4630 | skb_push(skb, sizeof(*rthdr)); | |
4631 | ||
4632 | memset(rthdr, 0, sizeof(*rthdr)); | |
4633 | rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr)); | |
4634 | rthdr->hdr.it_present = | |
4635 | cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) | | |
4636 | (1 << IEEE80211_RADIOTAP_DATA_RETRIES)); | |
4637 | ||
4638 | if (!(status->flags & IEEE80211_TX_STATUS_ACK) && | |
4639 | !is_multicast_ether_addr(hdr->addr1)) | |
4640 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL); | |
4641 | ||
4642 | if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) && | |
4643 | (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT)) | |
4644 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS); | |
4645 | else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) | |
4646 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS); | |
4647 | ||
4648 | rthdr->data_retries = status->retry_count; | |
4649 | ||
4650 | read_lock(&local->sub_if_lock); | |
4651 | monitors = local->monitors; | |
4652 | list_for_each_entry(sdata, &local->sub_if_list, list) { | |
4653 | /* | |
4654 | * Using the monitors counter is possibly racy, but | |
4655 | * if the value is wrong we simply either clone the skb | |
4656 | * once too much or forget sending it to one monitor iface | |
4657 | * The latter case isn't nice but fixing the race is much | |
4658 | * more complicated. | |
4659 | */ | |
4660 | if (!monitors || !skb) | |
4661 | goto out; | |
4662 | ||
4663 | if (sdata->type == IEEE80211_IF_TYPE_MNTR) { | |
4664 | if (!netif_running(sdata->dev)) | |
4665 | continue; | |
4666 | monitors--; | |
4667 | if (monitors) | |
4668 | skb2 = skb_clone(skb, GFP_KERNEL); | |
4669 | else | |
4670 | skb2 = NULL; | |
4671 | skb->dev = sdata->dev; | |
4672 | /* XXX: is this sufficient for BPF? */ | |
4673 | skb_set_mac_header(skb, 0); | |
4674 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
4675 | skb->pkt_type = PACKET_OTHERHOST; | |
4676 | skb->protocol = htons(ETH_P_802_2); | |
4677 | memset(skb->cb, 0, sizeof(skb->cb)); | |
4678 | netif_rx(skb); | |
4679 | skb = skb2; | |
4680 | break; | |
4681 | } | |
4682 | } | |
4683 | out: | |
4684 | read_unlock(&local->sub_if_lock); | |
4685 | if (skb) | |
4686 | dev_kfree_skb(skb); | |
f0706e82 JB |
4687 | } |
4688 | EXPORT_SYMBOL(ieee80211_tx_status); | |
4689 | ||
4690 | /* TODO: implement register/unregister functions for adding TX/RX handlers | |
4691 | * into ordered list */ | |
4692 | ||
4693 | /* rx_pre handlers don't have dev and sdata fields available in | |
4694 | * ieee80211_txrx_data */ | |
4695 | static ieee80211_rx_handler ieee80211_rx_pre_handlers[] = | |
4696 | { | |
4697 | ieee80211_rx_h_parse_qos, | |
4698 | ieee80211_rx_h_load_stats, | |
4699 | NULL | |
4700 | }; | |
4701 | ||
4702 | static ieee80211_rx_handler ieee80211_rx_handlers[] = | |
4703 | { | |
4704 | ieee80211_rx_h_if_stats, | |
4705 | ieee80211_rx_h_monitor, | |
4706 | ieee80211_rx_h_passive_scan, | |
4707 | ieee80211_rx_h_check, | |
4708 | ieee80211_rx_h_sta_process, | |
4709 | ieee80211_rx_h_ccmp_decrypt, | |
4710 | ieee80211_rx_h_tkip_decrypt, | |
4711 | ieee80211_rx_h_wep_weak_iv_detection, | |
4712 | ieee80211_rx_h_wep_decrypt, | |
4713 | ieee80211_rx_h_defragment, | |
4714 | ieee80211_rx_h_ps_poll, | |
4715 | ieee80211_rx_h_michael_mic_verify, | |
4716 | /* this must be after decryption - so header is counted in MPDU mic | |
4717 | * must be before pae and data, so QOS_DATA format frames | |
4718 | * are not passed to user space by these functions | |
4719 | */ | |
4720 | ieee80211_rx_h_remove_qos_control, | |
4721 | ieee80211_rx_h_802_1x_pae, | |
4722 | ieee80211_rx_h_drop_unencrypted, | |
4723 | ieee80211_rx_h_data, | |
4724 | ieee80211_rx_h_mgmt, | |
4725 | NULL | |
4726 | }; | |
4727 | ||
4728 | static ieee80211_tx_handler ieee80211_tx_handlers[] = | |
4729 | { | |
4730 | ieee80211_tx_h_check_assoc, | |
4731 | ieee80211_tx_h_sequence, | |
4732 | ieee80211_tx_h_ps_buf, | |
4733 | ieee80211_tx_h_select_key, | |
4734 | ieee80211_tx_h_michael_mic_add, | |
4735 | ieee80211_tx_h_fragment, | |
4736 | ieee80211_tx_h_tkip_encrypt, | |
4737 | ieee80211_tx_h_ccmp_encrypt, | |
4738 | ieee80211_tx_h_wep_encrypt, | |
4739 | ieee80211_tx_h_rate_ctrl, | |
4740 | ieee80211_tx_h_misc, | |
4741 | ieee80211_tx_h_load_stats, | |
4742 | NULL | |
4743 | }; | |
4744 | ||
4745 | ||
4746 | int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr) | |
4747 | { | |
4748 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
4749 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
4750 | struct sta_info *sta; | |
4751 | ||
4752 | if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0) | |
4753 | return 0; | |
4754 | ||
4755 | /* Create STA entry for the new peer */ | |
4756 | sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL); | |
4757 | if (!sta) | |
4758 | return -ENOMEM; | |
4759 | sta_info_put(sta); | |
4760 | ||
4761 | /* Remove STA entry for the old peer */ | |
4762 | sta = sta_info_get(local, sdata->u.wds.remote_addr); | |
4763 | if (sta) { | |
4764 | sta_info_put(sta); | |
4765 | sta_info_free(sta, 0); | |
4766 | } else { | |
4767 | printk(KERN_DEBUG "%s: could not find STA entry for WDS link " | |
4768 | "peer " MAC_FMT "\n", | |
4769 | dev->name, MAC_ARG(sdata->u.wds.remote_addr)); | |
4770 | } | |
4771 | ||
4772 | /* Update WDS link data */ | |
4773 | memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN); | |
4774 | ||
4775 | return 0; | |
4776 | } | |
4777 | ||
4778 | /* Must not be called for mdev and apdev */ | |
4779 | void ieee80211_if_setup(struct net_device *dev) | |
4780 | { | |
4781 | ether_setup(dev); | |
4782 | dev->hard_start_xmit = ieee80211_subif_start_xmit; | |
4783 | dev->wireless_handlers = &ieee80211_iw_handler_def; | |
4784 | dev->set_multicast_list = ieee80211_set_multicast_list; | |
4785 | dev->change_mtu = ieee80211_change_mtu; | |
4786 | dev->get_stats = ieee80211_get_stats; | |
4787 | dev->open = ieee80211_open; | |
4788 | dev->stop = ieee80211_stop; | |
4789 | dev->uninit = ieee80211_if_reinit; | |
4790 | dev->destructor = ieee80211_if_free; | |
4791 | } | |
4792 | ||
4793 | void ieee80211_if_mgmt_setup(struct net_device *dev) | |
4794 | { | |
4795 | ether_setup(dev); | |
4796 | dev->hard_start_xmit = ieee80211_mgmt_start_xmit; | |
4797 | dev->change_mtu = ieee80211_change_mtu_apdev; | |
4798 | dev->get_stats = ieee80211_get_stats; | |
4799 | dev->open = ieee80211_mgmt_open; | |
4800 | dev->stop = ieee80211_mgmt_stop; | |
4801 | dev->type = ARPHRD_IEEE80211_PRISM; | |
4802 | dev->hard_header_parse = header_parse_80211; | |
4803 | dev->uninit = ieee80211_if_reinit; | |
4804 | dev->destructor = ieee80211_if_free; | |
4805 | } | |
4806 | ||
4807 | int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local, | |
4808 | const char *name) | |
4809 | { | |
4810 | struct rate_control_ref *ref, *old; | |
4811 | ||
4812 | ASSERT_RTNL(); | |
4813 | if (local->open_count || netif_running(local->mdev) || | |
4814 | (local->apdev && netif_running(local->apdev))) | |
4815 | return -EBUSY; | |
4816 | ||
4817 | ref = rate_control_alloc(name, local); | |
4818 | if (!ref) { | |
4819 | printk(KERN_WARNING "%s: Failed to select rate control " | |
4820 | "algorithm\n", local->mdev->name); | |
4821 | return -ENOENT; | |
4822 | } | |
4823 | ||
4824 | old = local->rate_ctrl; | |
4825 | local->rate_ctrl = ref; | |
4826 | if (old) { | |
4827 | rate_control_put(old); | |
4828 | sta_info_flush(local, NULL); | |
4829 | } | |
4830 | ||
4831 | printk(KERN_DEBUG "%s: Selected rate control " | |
4832 | "algorithm '%s'\n", local->mdev->name, | |
4833 | ref->ops->name); | |
4834 | ||
4835 | ||
4836 | return 0; | |
4837 | } | |
4838 | ||
4839 | static void rate_control_deinitialize(struct ieee80211_local *local) | |
4840 | { | |
4841 | struct rate_control_ref *ref; | |
4842 | ||
4843 | ref = local->rate_ctrl; | |
4844 | local->rate_ctrl = NULL; | |
4845 | rate_control_put(ref); | |
4846 | } | |
4847 | ||
4848 | struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, | |
4849 | const struct ieee80211_ops *ops) | |
4850 | { | |
4851 | struct net_device *mdev; | |
4852 | struct ieee80211_local *local; | |
4853 | struct ieee80211_sub_if_data *sdata; | |
4854 | int priv_size; | |
4855 | struct wiphy *wiphy; | |
4856 | ||
4857 | /* Ensure 32-byte alignment of our private data and hw private data. | |
4858 | * We use the wiphy priv data for both our ieee80211_local and for | |
4859 | * the driver's private data | |
4860 | * | |
4861 | * In memory it'll be like this: | |
4862 | * | |
4863 | * +-------------------------+ | |
4864 | * | struct wiphy | | |
4865 | * +-------------------------+ | |
4866 | * | struct ieee80211_local | | |
4867 | * +-------------------------+ | |
4868 | * | driver's private data | | |
4869 | * +-------------------------+ | |
4870 | * | |
4871 | */ | |
4872 | priv_size = ((sizeof(struct ieee80211_local) + | |
4873 | NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) + | |
4874 | priv_data_len; | |
4875 | ||
4876 | wiphy = wiphy_new(&mac80211_config_ops, priv_size); | |
4877 | ||
4878 | if (!wiphy) | |
4879 | return NULL; | |
4880 | ||
4881 | wiphy->privid = mac80211_wiphy_privid; | |
4882 | ||
4883 | local = wiphy_priv(wiphy); | |
4884 | local->hw.wiphy = wiphy; | |
4885 | ||
4886 | local->hw.priv = (char *)local + | |
4887 | ((sizeof(struct ieee80211_local) + | |
4888 | NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST); | |
4889 | ||
4480f15c JB |
4890 | BUG_ON(!ops->tx); |
4891 | BUG_ON(!ops->config); | |
4892 | BUG_ON(!ops->add_interface); | |
f0706e82 JB |
4893 | local->ops = ops; |
4894 | ||
4895 | /* for now, mdev needs sub_if_data :/ */ | |
4896 | mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data), | |
4897 | "wmaster%d", ether_setup); | |
4898 | if (!mdev) { | |
4899 | wiphy_free(wiphy); | |
4900 | return NULL; | |
4901 | } | |
4902 | ||
4903 | sdata = IEEE80211_DEV_TO_SUB_IF(mdev); | |
4904 | mdev->ieee80211_ptr = &sdata->wdev; | |
4905 | sdata->wdev.wiphy = wiphy; | |
4906 | ||
4907 | local->hw.queues = 1; /* default */ | |
4908 | ||
4909 | local->mdev = mdev; | |
4910 | local->rx_pre_handlers = ieee80211_rx_pre_handlers; | |
4911 | local->rx_handlers = ieee80211_rx_handlers; | |
4912 | local->tx_handlers = ieee80211_tx_handlers; | |
4913 | ||
4914 | local->bridge_packets = 1; | |
4915 | ||
4916 | local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD; | |
4917 | local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD; | |
4918 | local->short_retry_limit = 7; | |
4919 | local->long_retry_limit = 4; | |
4920 | local->hw.conf.radio_enabled = 1; | |
f0706e82 JB |
4921 | |
4922 | local->enabled_modes = (unsigned int) -1; | |
4923 | ||
4924 | INIT_LIST_HEAD(&local->modes_list); | |
4925 | ||
4926 | rwlock_init(&local->sub_if_lock); | |
4927 | INIT_LIST_HEAD(&local->sub_if_list); | |
4928 | ||
4929 | INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work); | |
4930 | init_timer(&local->stat_timer); | |
4931 | local->stat_timer.function = ieee80211_stat_refresh; | |
4932 | local->stat_timer.data = (unsigned long) local; | |
4933 | ieee80211_rx_bss_list_init(mdev); | |
4934 | ||
4935 | sta_info_init(local); | |
4936 | ||
4937 | mdev->hard_start_xmit = ieee80211_master_start_xmit; | |
4938 | mdev->open = ieee80211_master_open; | |
4939 | mdev->stop = ieee80211_master_stop; | |
4940 | mdev->type = ARPHRD_IEEE80211; | |
4941 | mdev->hard_header_parse = header_parse_80211; | |
4942 | ||
4943 | sdata->type = IEEE80211_IF_TYPE_AP; | |
4944 | sdata->dev = mdev; | |
4945 | sdata->local = local; | |
4946 | sdata->u.ap.force_unicast_rateidx = -1; | |
4947 | sdata->u.ap.max_ratectrl_rateidx = -1; | |
4948 | ieee80211_if_sdata_init(sdata); | |
4949 | list_add_tail(&sdata->list, &local->sub_if_list); | |
4950 | ||
4951 | tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, | |
4952 | (unsigned long)local); | |
4953 | tasklet_disable(&local->tx_pending_tasklet); | |
4954 | ||
4955 | tasklet_init(&local->tasklet, | |
4956 | ieee80211_tasklet_handler, | |
4957 | (unsigned long) local); | |
4958 | tasklet_disable(&local->tasklet); | |
4959 | ||
4960 | skb_queue_head_init(&local->skb_queue); | |
4961 | skb_queue_head_init(&local->skb_queue_unreliable); | |
4962 | ||
4963 | return local_to_hw(local); | |
4964 | } | |
4965 | EXPORT_SYMBOL(ieee80211_alloc_hw); | |
4966 | ||
4967 | int ieee80211_register_hw(struct ieee80211_hw *hw) | |
4968 | { | |
4969 | struct ieee80211_local *local = hw_to_local(hw); | |
4970 | const char *name; | |
4971 | int result; | |
4972 | ||
4973 | result = wiphy_register(local->hw.wiphy); | |
4974 | if (result < 0) | |
4975 | return result; | |
4976 | ||
4977 | name = wiphy_dev(local->hw.wiphy)->driver->name; | |
4978 | local->hw.workqueue = create_singlethread_workqueue(name); | |
4979 | if (!local->hw.workqueue) { | |
4980 | result = -ENOMEM; | |
4981 | goto fail_workqueue; | |
4982 | } | |
4983 | ||
b306f453 JB |
4984 | /* |
4985 | * The hardware needs headroom for sending the frame, | |
4986 | * and we need some headroom for passing the frame to monitor | |
4987 | * interfaces, but never both at the same time. | |
4988 | */ | |
4989 | local->tx_headroom = max(local->hw.extra_tx_headroom, | |
4990 | sizeof(struct ieee80211_tx_status_rtap_hdr)); | |
4991 | ||
e9f207f0 JB |
4992 | debugfs_hw_add(local); |
4993 | ||
f0706e82 JB |
4994 | local->hw.conf.beacon_int = 1000; |
4995 | ||
4996 | local->wstats_flags |= local->hw.max_rssi ? | |
4997 | IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID; | |
4998 | local->wstats_flags |= local->hw.max_signal ? | |
4999 | IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID; | |
5000 | local->wstats_flags |= local->hw.max_noise ? | |
5001 | IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID; | |
5002 | if (local->hw.max_rssi < 0 || local->hw.max_noise < 0) | |
5003 | local->wstats_flags |= IW_QUAL_DBM; | |
5004 | ||
5005 | result = sta_info_start(local); | |
5006 | if (result < 0) | |
5007 | goto fail_sta_info; | |
5008 | ||
5009 | rtnl_lock(); | |
5010 | result = dev_alloc_name(local->mdev, local->mdev->name); | |
5011 | if (result < 0) | |
5012 | goto fail_dev; | |
5013 | ||
5014 | memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN); | |
5015 | SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy)); | |
5016 | ||
5017 | result = register_netdevice(local->mdev); | |
5018 | if (result < 0) | |
5019 | goto fail_dev; | |
5020 | ||
e9f207f0 JB |
5021 | ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev)); |
5022 | ||
f0706e82 JB |
5023 | result = ieee80211_init_rate_ctrl_alg(local, NULL); |
5024 | if (result < 0) { | |
5025 | printk(KERN_DEBUG "%s: Failed to initialize rate control " | |
5026 | "algorithm\n", local->mdev->name); | |
5027 | goto fail_rate; | |
5028 | } | |
5029 | ||
5030 | result = ieee80211_wep_init(local); | |
5031 | ||
5032 | if (result < 0) { | |
5033 | printk(KERN_DEBUG "%s: Failed to initialize wep\n", | |
5034 | local->mdev->name); | |
5035 | goto fail_wep; | |
5036 | } | |
5037 | ||
5038 | ieee80211_install_qdisc(local->mdev); | |
5039 | ||
5040 | /* add one default STA interface */ | |
5041 | result = ieee80211_if_add(local->mdev, "wlan%d", NULL, | |
5042 | IEEE80211_IF_TYPE_STA); | |
5043 | if (result) | |
5044 | printk(KERN_WARNING "%s: Failed to add default virtual iface\n", | |
5045 | local->mdev->name); | |
5046 | ||
5047 | local->reg_state = IEEE80211_DEV_REGISTERED; | |
5048 | rtnl_unlock(); | |
5049 | ||
5050 | ieee80211_led_init(local); | |
5051 | ||
5052 | return 0; | |
5053 | ||
5054 | fail_wep: | |
5055 | rate_control_deinitialize(local); | |
5056 | fail_rate: | |
e9f207f0 | 5057 | ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev)); |
f0706e82 JB |
5058 | unregister_netdevice(local->mdev); |
5059 | fail_dev: | |
5060 | rtnl_unlock(); | |
5061 | sta_info_stop(local); | |
5062 | fail_sta_info: | |
e9f207f0 | 5063 | debugfs_hw_del(local); |
f0706e82 JB |
5064 | destroy_workqueue(local->hw.workqueue); |
5065 | fail_workqueue: | |
5066 | wiphy_unregister(local->hw.wiphy); | |
5067 | return result; | |
5068 | } | |
5069 | EXPORT_SYMBOL(ieee80211_register_hw); | |
5070 | ||
5071 | int ieee80211_register_hwmode(struct ieee80211_hw *hw, | |
5072 | struct ieee80211_hw_mode *mode) | |
5073 | { | |
5074 | struct ieee80211_local *local = hw_to_local(hw); | |
5075 | struct ieee80211_rate *rate; | |
5076 | int i; | |
5077 | ||
5078 | INIT_LIST_HEAD(&mode->list); | |
5079 | list_add_tail(&mode->list, &local->modes_list); | |
5080 | ||
5081 | local->hw_modes |= (1 << mode->mode); | |
5082 | for (i = 0; i < mode->num_rates; i++) { | |
5083 | rate = &(mode->rates[i]); | |
5084 | rate->rate_inv = CHAN_UTIL_RATE_LCM / rate->rate; | |
5085 | } | |
5086 | ieee80211_prepare_rates(local, mode); | |
5087 | ||
5088 | if (!local->oper_hw_mode) { | |
5089 | /* Default to this mode */ | |
5090 | local->hw.conf.phymode = mode->mode; | |
5091 | local->oper_hw_mode = local->scan_hw_mode = mode; | |
5092 | local->oper_channel = local->scan_channel = &mode->channels[0]; | |
5093 | local->hw.conf.mode = local->oper_hw_mode; | |
5094 | local->hw.conf.chan = local->oper_channel; | |
5095 | } | |
5096 | ||
5097 | if (!(hw->flags & IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED)) | |
fd8bacc9 | 5098 | ieee80211_set_default_regdomain(mode); |
f0706e82 JB |
5099 | |
5100 | return 0; | |
5101 | } | |
5102 | EXPORT_SYMBOL(ieee80211_register_hwmode); | |
5103 | ||
5104 | void ieee80211_unregister_hw(struct ieee80211_hw *hw) | |
5105 | { | |
5106 | struct ieee80211_local *local = hw_to_local(hw); | |
5107 | struct ieee80211_sub_if_data *sdata, *tmp; | |
5108 | struct list_head tmp_list; | |
5109 | int i; | |
5110 | ||
5111 | tasklet_kill(&local->tx_pending_tasklet); | |
5112 | tasklet_kill(&local->tasklet); | |
5113 | ||
5114 | rtnl_lock(); | |
5115 | ||
5116 | BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED); | |
5117 | ||
5118 | local->reg_state = IEEE80211_DEV_UNREGISTERED; | |
5119 | if (local->apdev) | |
5120 | ieee80211_if_del_mgmt(local); | |
5121 | ||
5122 | write_lock_bh(&local->sub_if_lock); | |
5123 | list_replace_init(&local->sub_if_list, &tmp_list); | |
5124 | write_unlock_bh(&local->sub_if_lock); | |
5125 | ||
5126 | list_for_each_entry_safe(sdata, tmp, &tmp_list, list) | |
5127 | __ieee80211_if_del(local, sdata); | |
5128 | ||
5129 | rtnl_unlock(); | |
5130 | ||
5131 | if (local->stat_time) | |
5132 | del_timer_sync(&local->stat_timer); | |
5133 | ||
5134 | ieee80211_rx_bss_list_deinit(local->mdev); | |
5135 | ieee80211_clear_tx_pending(local); | |
5136 | sta_info_stop(local); | |
5137 | rate_control_deinitialize(local); | |
e9f207f0 | 5138 | debugfs_hw_del(local); |
f0706e82 JB |
5139 | |
5140 | for (i = 0; i < NUM_IEEE80211_MODES; i++) { | |
5141 | kfree(local->supp_rates[i]); | |
5142 | kfree(local->basic_rates[i]); | |
5143 | } | |
5144 | ||
5145 | if (skb_queue_len(&local->skb_queue) | |
5146 | || skb_queue_len(&local->skb_queue_unreliable)) | |
5147 | printk(KERN_WARNING "%s: skb_queue not empty\n", | |
5148 | local->mdev->name); | |
5149 | skb_queue_purge(&local->skb_queue); | |
5150 | skb_queue_purge(&local->skb_queue_unreliable); | |
5151 | ||
5152 | destroy_workqueue(local->hw.workqueue); | |
5153 | wiphy_unregister(local->hw.wiphy); | |
5154 | ieee80211_wep_free(local); | |
5155 | ieee80211_led_exit(local); | |
5156 | } | |
5157 | EXPORT_SYMBOL(ieee80211_unregister_hw); | |
5158 | ||
5159 | void ieee80211_free_hw(struct ieee80211_hw *hw) | |
5160 | { | |
5161 | struct ieee80211_local *local = hw_to_local(hw); | |
5162 | ||
5163 | ieee80211_if_free(local->mdev); | |
5164 | wiphy_free(local->hw.wiphy); | |
5165 | } | |
5166 | EXPORT_SYMBOL(ieee80211_free_hw); | |
5167 | ||
5168 | void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue) | |
5169 | { | |
5170 | struct ieee80211_local *local = hw_to_local(hw); | |
5171 | ||
5172 | if (test_and_clear_bit(IEEE80211_LINK_STATE_XOFF, | |
5173 | &local->state[queue])) { | |
5174 | if (test_bit(IEEE80211_LINK_STATE_PENDING, | |
5175 | &local->state[queue])) | |
5176 | tasklet_schedule(&local->tx_pending_tasklet); | |
5177 | else | |
5178 | if (!ieee80211_qdisc_installed(local->mdev)) { | |
5179 | if (queue == 0) | |
5180 | netif_wake_queue(local->mdev); | |
5181 | } else | |
5182 | __netif_schedule(local->mdev); | |
5183 | } | |
5184 | } | |
5185 | EXPORT_SYMBOL(ieee80211_wake_queue); | |
5186 | ||
5187 | void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue) | |
5188 | { | |
5189 | struct ieee80211_local *local = hw_to_local(hw); | |
5190 | ||
5191 | if (!ieee80211_qdisc_installed(local->mdev) && queue == 0) | |
5192 | netif_stop_queue(local->mdev); | |
5193 | set_bit(IEEE80211_LINK_STATE_XOFF, &local->state[queue]); | |
5194 | } | |
5195 | EXPORT_SYMBOL(ieee80211_stop_queue); | |
5196 | ||
5197 | void ieee80211_start_queues(struct ieee80211_hw *hw) | |
5198 | { | |
5199 | struct ieee80211_local *local = hw_to_local(hw); | |
5200 | int i; | |
5201 | ||
5202 | for (i = 0; i < local->hw.queues; i++) | |
5203 | clear_bit(IEEE80211_LINK_STATE_XOFF, &local->state[i]); | |
5204 | if (!ieee80211_qdisc_installed(local->mdev)) | |
5205 | netif_start_queue(local->mdev); | |
5206 | } | |
5207 | EXPORT_SYMBOL(ieee80211_start_queues); | |
5208 | ||
5209 | void ieee80211_stop_queues(struct ieee80211_hw *hw) | |
5210 | { | |
5211 | int i; | |
5212 | ||
5213 | for (i = 0; i < hw->queues; i++) | |
5214 | ieee80211_stop_queue(hw, i); | |
5215 | } | |
5216 | EXPORT_SYMBOL(ieee80211_stop_queues); | |
5217 | ||
5218 | void ieee80211_wake_queues(struct ieee80211_hw *hw) | |
5219 | { | |
5220 | int i; | |
5221 | ||
5222 | for (i = 0; i < hw->queues; i++) | |
5223 | ieee80211_wake_queue(hw, i); | |
5224 | } | |
5225 | EXPORT_SYMBOL(ieee80211_wake_queues); | |
5226 | ||
5227 | struct net_device_stats *ieee80211_dev_stats(struct net_device *dev) | |
5228 | { | |
5229 | struct ieee80211_sub_if_data *sdata; | |
5230 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
5231 | return &sdata->stats; | |
5232 | } | |
5233 | ||
5234 | static int __init ieee80211_init(void) | |
5235 | { | |
5236 | struct sk_buff *skb; | |
5237 | int ret; | |
5238 | ||
5239 | BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb)); | |
5240 | ||
5241 | ret = ieee80211_wme_register(); | |
5242 | if (ret) { | |
5243 | printk(KERN_DEBUG "ieee80211_init: failed to " | |
5244 | "initialize WME (err=%d)\n", ret); | |
5245 | return ret; | |
5246 | } | |
5247 | ||
e9f207f0 | 5248 | ieee80211_debugfs_netdev_init(); |
fd8bacc9 | 5249 | ieee80211_regdomain_init(); |
e9f207f0 | 5250 | |
f0706e82 JB |
5251 | return 0; |
5252 | } | |
5253 | ||
5254 | ||
5255 | static void __exit ieee80211_exit(void) | |
5256 | { | |
5257 | ieee80211_wme_unregister(); | |
e9f207f0 | 5258 | ieee80211_debugfs_netdev_exit(); |
f0706e82 JB |
5259 | } |
5260 | ||
5261 | ||
5262 | module_init(ieee80211_init); | |
5263 | module_exit(ieee80211_exit); | |
5264 | ||
5265 | MODULE_DESCRIPTION("IEEE 802.11 subsystem"); | |
5266 | MODULE_LICENSE("GPL"); |