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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) */ | |
571ecf67 | 48 | const unsigned char rfc1042_header[] = |
f0706e82 JB |
49 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 }; |
50 | ||
51 | /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */ | |
571ecf67 | 52 | const unsigned char bridge_tunnel_header[] = |
f0706e82 JB |
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 | ||
571ecf67 JB |
225 | void ieee80211_key_threshold_notify(struct net_device *dev, |
226 | struct ieee80211_key *key, | |
227 | struct sta_info *sta) | |
f0706e82 JB |
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 | ||
571ecf67 | 261 | u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len) |
f0706e82 JB |
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 | ||
f0706e82 JB |
348 | |
349 | #ifdef CONFIG_MAC80211_LOWTX_FRAME_DUMP | |
350 | static void ieee80211_dump_frame(const char *ifname, const char *title, | |
351 | const struct sk_buff *skb) | |
352 | { | |
353 | const struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
354 | u16 fc; | |
355 | int hdrlen; | |
356 | ||
357 | printk(KERN_DEBUG "%s: %s (len=%d)", ifname, title, skb->len); | |
358 | if (skb->len < 4) { | |
359 | printk("\n"); | |
360 | return; | |
361 | } | |
362 | ||
363 | fc = le16_to_cpu(hdr->frame_control); | |
364 | hdrlen = ieee80211_get_hdrlen(fc); | |
365 | if (hdrlen > skb->len) | |
366 | hdrlen = skb->len; | |
367 | if (hdrlen >= 4) | |
368 | printk(" FC=0x%04x DUR=0x%04x", | |
369 | fc, le16_to_cpu(hdr->duration_id)); | |
370 | if (hdrlen >= 10) | |
371 | printk(" A1=" MAC_FMT, MAC_ARG(hdr->addr1)); | |
372 | if (hdrlen >= 16) | |
373 | printk(" A2=" MAC_FMT, MAC_ARG(hdr->addr2)); | |
374 | if (hdrlen >= 24) | |
375 | printk(" A3=" MAC_FMT, MAC_ARG(hdr->addr3)); | |
376 | if (hdrlen >= 30) | |
377 | printk(" A4=" MAC_FMT, MAC_ARG(hdr->addr4)); | |
378 | printk("\n"); | |
379 | } | |
380 | #else /* CONFIG_MAC80211_LOWTX_FRAME_DUMP */ | |
381 | static inline void ieee80211_dump_frame(const char *ifname, const char *title, | |
382 | struct sk_buff *skb) | |
383 | { | |
384 | } | |
385 | #endif /* CONFIG_MAC80211_LOWTX_FRAME_DUMP */ | |
386 | ||
387 | ||
571ecf67 | 388 | int ieee80211_is_eapol(const struct sk_buff *skb) |
f0706e82 JB |
389 | { |
390 | const struct ieee80211_hdr *hdr; | |
391 | u16 fc; | |
392 | int hdrlen; | |
393 | ||
394 | if (unlikely(skb->len < 10)) | |
395 | return 0; | |
396 | ||
397 | hdr = (const struct ieee80211_hdr *) skb->data; | |
398 | fc = le16_to_cpu(hdr->frame_control); | |
399 | ||
400 | if (unlikely(!WLAN_FC_DATA_PRESENT(fc))) | |
401 | return 0; | |
402 | ||
403 | hdrlen = ieee80211_get_hdrlen(fc); | |
404 | ||
405 | if (unlikely(skb->len >= hdrlen + sizeof(eapol_header) && | |
406 | memcmp(skb->data + hdrlen, eapol_header, | |
407 | sizeof(eapol_header)) == 0)) | |
408 | return 1; | |
409 | ||
410 | return 0; | |
411 | } | |
412 | ||
413 | ||
414 | static ieee80211_txrx_result | |
415 | ieee80211_tx_h_rate_ctrl(struct ieee80211_txrx_data *tx) | |
416 | { | |
417 | struct rate_control_extra extra; | |
418 | ||
419 | memset(&extra, 0, sizeof(extra)); | |
420 | extra.mode = tx->u.tx.mode; | |
421 | extra.mgmt_data = tx->sdata && | |
422 | tx->sdata->type == IEEE80211_IF_TYPE_MGMT; | |
423 | extra.ethertype = tx->ethertype; | |
424 | ||
425 | tx->u.tx.rate = rate_control_get_rate(tx->local, tx->dev, tx->skb, | |
426 | &extra); | |
427 | if (unlikely(extra.probe != NULL)) { | |
428 | tx->u.tx.control->flags |= IEEE80211_TXCTL_RATE_CTRL_PROBE; | |
429 | tx->u.tx.probe_last_frag = 1; | |
430 | tx->u.tx.control->alt_retry_rate = tx->u.tx.rate->val; | |
431 | tx->u.tx.rate = extra.probe; | |
432 | } else { | |
433 | tx->u.tx.control->alt_retry_rate = -1; | |
434 | } | |
435 | if (!tx->u.tx.rate) | |
436 | return TXRX_DROP; | |
437 | if (tx->u.tx.mode->mode == MODE_IEEE80211G && | |
63fc33ce | 438 | tx->sdata->use_protection && tx->fragmented && |
f0706e82 JB |
439 | extra.nonerp) { |
440 | tx->u.tx.last_frag_rate = tx->u.tx.rate; | |
441 | tx->u.tx.probe_last_frag = extra.probe ? 1 : 0; | |
442 | ||
443 | tx->u.tx.rate = extra.nonerp; | |
444 | tx->u.tx.control->rate = extra.nonerp; | |
445 | tx->u.tx.control->flags &= ~IEEE80211_TXCTL_RATE_CTRL_PROBE; | |
446 | } else { | |
447 | tx->u.tx.last_frag_rate = tx->u.tx.rate; | |
448 | tx->u.tx.control->rate = tx->u.tx.rate; | |
449 | } | |
450 | tx->u.tx.control->tx_rate = tx->u.tx.rate->val; | |
451 | if ((tx->u.tx.rate->flags & IEEE80211_RATE_PREAMBLE2) && | |
452 | tx->local->short_preamble && | |
453 | (!tx->sta || (tx->sta->flags & WLAN_STA_SHORT_PREAMBLE))) { | |
454 | tx->u.tx.short_preamble = 1; | |
455 | tx->u.tx.control->tx_rate = tx->u.tx.rate->val2; | |
456 | } | |
457 | ||
458 | return TXRX_CONTINUE; | |
459 | } | |
460 | ||
461 | ||
462 | static ieee80211_txrx_result | |
463 | ieee80211_tx_h_select_key(struct ieee80211_txrx_data *tx) | |
464 | { | |
465 | if (tx->sta) | |
466 | tx->u.tx.control->key_idx = tx->sta->key_idx_compression; | |
467 | else | |
468 | tx->u.tx.control->key_idx = HW_KEY_IDX_INVALID; | |
469 | ||
470 | if (unlikely(tx->u.tx.control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT)) | |
471 | tx->key = NULL; | |
472 | else if (tx->sta && tx->sta->key) | |
473 | tx->key = tx->sta->key; | |
474 | else if (tx->sdata->default_key) | |
475 | tx->key = tx->sdata->default_key; | |
476 | else if (tx->sdata->drop_unencrypted && | |
477 | !(tx->sdata->eapol && ieee80211_is_eapol(tx->skb))) { | |
478 | I802_DEBUG_INC(tx->local->tx_handlers_drop_unencrypted); | |
479 | return TXRX_DROP; | |
480 | } else | |
481 | tx->key = NULL; | |
482 | ||
483 | if (tx->key) { | |
484 | tx->key->tx_rx_count++; | |
485 | if (unlikely(tx->local->key_tx_rx_threshold && | |
486 | tx->key->tx_rx_count > | |
487 | tx->local->key_tx_rx_threshold)) { | |
488 | ieee80211_key_threshold_notify(tx->dev, tx->key, | |
489 | tx->sta); | |
490 | } | |
491 | } | |
492 | ||
493 | return TXRX_CONTINUE; | |
494 | } | |
495 | ||
496 | ||
497 | static ieee80211_txrx_result | |
498 | ieee80211_tx_h_fragment(struct ieee80211_txrx_data *tx) | |
499 | { | |
500 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data; | |
501 | size_t hdrlen, per_fragm, num_fragm, payload_len, left; | |
502 | struct sk_buff **frags, *first, *frag; | |
503 | int i; | |
504 | u16 seq; | |
505 | u8 *pos; | |
506 | int frag_threshold = tx->local->fragmentation_threshold; | |
507 | ||
508 | if (!tx->fragmented) | |
509 | return TXRX_CONTINUE; | |
510 | ||
511 | first = tx->skb; | |
512 | ||
513 | hdrlen = ieee80211_get_hdrlen(tx->fc); | |
514 | payload_len = first->len - hdrlen; | |
515 | per_fragm = frag_threshold - hdrlen - FCS_LEN; | |
516 | num_fragm = (payload_len + per_fragm - 1) / per_fragm; | |
517 | ||
518 | frags = kzalloc(num_fragm * sizeof(struct sk_buff *), GFP_ATOMIC); | |
519 | if (!frags) | |
520 | goto fail; | |
521 | ||
522 | hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_MOREFRAGS); | |
523 | seq = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_SEQ; | |
524 | pos = first->data + hdrlen + per_fragm; | |
525 | left = payload_len - per_fragm; | |
526 | for (i = 0; i < num_fragm - 1; i++) { | |
527 | struct ieee80211_hdr *fhdr; | |
528 | size_t copylen; | |
529 | ||
530 | if (left <= 0) | |
531 | goto fail; | |
532 | ||
533 | /* reserve enough extra head and tail room for possible | |
534 | * encryption */ | |
535 | frag = frags[i] = | |
b306f453 | 536 | dev_alloc_skb(tx->local->tx_headroom + |
f0706e82 JB |
537 | frag_threshold + |
538 | IEEE80211_ENCRYPT_HEADROOM + | |
539 | IEEE80211_ENCRYPT_TAILROOM); | |
540 | if (!frag) | |
541 | goto fail; | |
542 | /* Make sure that all fragments use the same priority so | |
543 | * that they end up using the same TX queue */ | |
544 | frag->priority = first->priority; | |
b306f453 JB |
545 | skb_reserve(frag, tx->local->tx_headroom + |
546 | IEEE80211_ENCRYPT_HEADROOM); | |
f0706e82 JB |
547 | fhdr = (struct ieee80211_hdr *) skb_put(frag, hdrlen); |
548 | memcpy(fhdr, first->data, hdrlen); | |
549 | if (i == num_fragm - 2) | |
550 | fhdr->frame_control &= cpu_to_le16(~IEEE80211_FCTL_MOREFRAGS); | |
551 | fhdr->seq_ctrl = cpu_to_le16(seq | ((i + 1) & IEEE80211_SCTL_FRAG)); | |
552 | copylen = left > per_fragm ? per_fragm : left; | |
553 | memcpy(skb_put(frag, copylen), pos, copylen); | |
554 | ||
555 | pos += copylen; | |
556 | left -= copylen; | |
557 | } | |
558 | skb_trim(first, hdrlen + per_fragm); | |
559 | ||
560 | tx->u.tx.num_extra_frag = num_fragm - 1; | |
561 | tx->u.tx.extra_frag = frags; | |
562 | ||
563 | return TXRX_CONTINUE; | |
564 | ||
565 | fail: | |
566 | printk(KERN_DEBUG "%s: failed to fragment frame\n", tx->dev->name); | |
567 | if (frags) { | |
568 | for (i = 0; i < num_fragm - 1; i++) | |
569 | if (frags[i]) | |
570 | dev_kfree_skb(frags[i]); | |
571 | kfree(frags); | |
572 | } | |
573 | I802_DEBUG_INC(tx->local->tx_handlers_drop_fragment); | |
574 | return TXRX_DROP; | |
575 | } | |
576 | ||
577 | ||
578 | static int wep_encrypt_skb(struct ieee80211_txrx_data *tx, struct sk_buff *skb) | |
579 | { | |
580 | if (tx->key->force_sw_encrypt) { | |
581 | if (ieee80211_wep_encrypt(tx->local, skb, tx->key)) | |
582 | return -1; | |
583 | } else { | |
584 | tx->u.tx.control->key_idx = tx->key->hw_key_idx; | |
585 | if (tx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) { | |
586 | if (ieee80211_wep_add_iv(tx->local, skb, tx->key) == | |
587 | NULL) | |
588 | return -1; | |
589 | } | |
590 | } | |
591 | return 0; | |
592 | } | |
593 | ||
594 | ||
595 | void ieee80211_tx_set_iswep(struct ieee80211_txrx_data *tx) | |
596 | { | |
597 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data; | |
598 | ||
599 | hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
600 | if (tx->u.tx.extra_frag) { | |
601 | struct ieee80211_hdr *fhdr; | |
602 | int i; | |
603 | for (i = 0; i < tx->u.tx.num_extra_frag; i++) { | |
604 | fhdr = (struct ieee80211_hdr *) | |
605 | tx->u.tx.extra_frag[i]->data; | |
606 | fhdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); | |
607 | } | |
608 | } | |
609 | } | |
610 | ||
611 | ||
612 | static ieee80211_txrx_result | |
613 | ieee80211_tx_h_wep_encrypt(struct ieee80211_txrx_data *tx) | |
614 | { | |
615 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data; | |
616 | u16 fc; | |
617 | ||
618 | fc = le16_to_cpu(hdr->frame_control); | |
619 | ||
620 | if (!tx->key || tx->key->alg != ALG_WEP || | |
621 | ((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA && | |
622 | ((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT || | |
623 | (fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_AUTH))) | |
624 | return TXRX_CONTINUE; | |
625 | ||
626 | tx->u.tx.control->iv_len = WEP_IV_LEN; | |
627 | tx->u.tx.control->icv_len = WEP_ICV_LEN; | |
628 | ieee80211_tx_set_iswep(tx); | |
629 | ||
630 | if (wep_encrypt_skb(tx, tx->skb) < 0) { | |
631 | I802_DEBUG_INC(tx->local->tx_handlers_drop_wep); | |
632 | return TXRX_DROP; | |
633 | } | |
634 | ||
635 | if (tx->u.tx.extra_frag) { | |
636 | int i; | |
637 | for (i = 0; i < tx->u.tx.num_extra_frag; i++) { | |
638 | if (wep_encrypt_skb(tx, tx->u.tx.extra_frag[i]) < 0) { | |
639 | I802_DEBUG_INC(tx->local-> | |
640 | tx_handlers_drop_wep); | |
641 | return TXRX_DROP; | |
642 | } | |
643 | } | |
644 | } | |
645 | ||
646 | return TXRX_CONTINUE; | |
647 | } | |
648 | ||
649 | ||
650 | static int ieee80211_frame_duration(struct ieee80211_local *local, size_t len, | |
651 | int rate, int erp, int short_preamble) | |
652 | { | |
653 | int dur; | |
654 | ||
655 | /* calculate duration (in microseconds, rounded up to next higher | |
656 | * integer if it includes a fractional microsecond) to send frame of | |
657 | * len bytes (does not include FCS) at the given rate. Duration will | |
658 | * also include SIFS. | |
659 | * | |
660 | * rate is in 100 kbps, so divident is multiplied by 10 in the | |
661 | * DIV_ROUND_UP() operations. | |
662 | */ | |
663 | ||
664 | if (local->hw.conf.phymode == MODE_IEEE80211A || erp || | |
665 | local->hw.conf.phymode == MODE_ATHEROS_TURBO) { | |
666 | /* | |
667 | * OFDM: | |
668 | * | |
669 | * N_DBPS = DATARATE x 4 | |
670 | * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS) | |
671 | * (16 = SIGNAL time, 6 = tail bits) | |
672 | * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext | |
673 | * | |
674 | * T_SYM = 4 usec | |
675 | * 802.11a - 17.5.2: aSIFSTime = 16 usec | |
676 | * 802.11g - 19.8.4: aSIFSTime = 10 usec + | |
677 | * signal ext = 6 usec | |
678 | */ | |
679 | /* FIX: Atheros Turbo may have different (shorter) duration? */ | |
680 | dur = 16; /* SIFS + signal ext */ | |
681 | dur += 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */ | |
682 | dur += 4; /* 17.3.2.3: T_SIGNAL = 4 usec */ | |
683 | dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10, | |
684 | 4 * rate); /* T_SYM x N_SYM */ | |
685 | } else { | |
686 | /* | |
687 | * 802.11b or 802.11g with 802.11b compatibility: | |
688 | * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime + | |
689 | * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0. | |
690 | * | |
691 | * 802.11 (DS): 15.3.3, 802.11b: 18.3.4 | |
692 | * aSIFSTime = 10 usec | |
693 | * aPreambleLength = 144 usec or 72 usec with short preamble | |
694 | * aPLCPHeaderLength = 48 usec or 24 usec with short preamble | |
695 | */ | |
696 | dur = 10; /* aSIFSTime = 10 usec */ | |
697 | dur += short_preamble ? (72 + 24) : (144 + 48); | |
698 | ||
699 | dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate); | |
700 | } | |
701 | ||
702 | return dur; | |
703 | } | |
704 | ||
705 | ||
706 | /* Exported duration function for driver use */ | |
707 | __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, | |
708 | size_t frame_len, int rate) | |
709 | { | |
710 | struct ieee80211_local *local = hw_to_local(hw); | |
711 | u16 dur; | |
712 | int erp; | |
713 | ||
714 | erp = ieee80211_is_erp_rate(hw->conf.phymode, rate); | |
715 | dur = ieee80211_frame_duration(local, frame_len, rate, | |
716 | erp, local->short_preamble); | |
717 | ||
718 | return cpu_to_le16(dur); | |
719 | } | |
720 | EXPORT_SYMBOL(ieee80211_generic_frame_duration); | |
721 | ||
722 | ||
723 | static u16 ieee80211_duration(struct ieee80211_txrx_data *tx, int group_addr, | |
724 | int next_frag_len) | |
725 | { | |
726 | int rate, mrate, erp, dur, i; | |
727 | struct ieee80211_rate *txrate = tx->u.tx.rate; | |
728 | struct ieee80211_local *local = tx->local; | |
729 | struct ieee80211_hw_mode *mode = tx->u.tx.mode; | |
730 | ||
731 | erp = txrate->flags & IEEE80211_RATE_ERP; | |
732 | ||
733 | /* | |
734 | * data and mgmt (except PS Poll): | |
735 | * - during CFP: 32768 | |
736 | * - during contention period: | |
737 | * if addr1 is group address: 0 | |
738 | * if more fragments = 0 and addr1 is individual address: time to | |
739 | * transmit one ACK plus SIFS | |
740 | * if more fragments = 1 and addr1 is individual address: time to | |
741 | * transmit next fragment plus 2 x ACK plus 3 x SIFS | |
742 | * | |
743 | * IEEE 802.11, 9.6: | |
744 | * - control response frame (CTS or ACK) shall be transmitted using the | |
745 | * same rate as the immediately previous frame in the frame exchange | |
746 | * sequence, if this rate belongs to the PHY mandatory rates, or else | |
747 | * at the highest possible rate belonging to the PHY rates in the | |
748 | * BSSBasicRateSet | |
749 | */ | |
750 | ||
751 | if ((tx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL) { | |
752 | /* TODO: These control frames are not currently sent by | |
753 | * 80211.o, but should they be implemented, this function | |
754 | * needs to be updated to support duration field calculation. | |
755 | * | |
756 | * RTS: time needed to transmit pending data/mgmt frame plus | |
757 | * one CTS frame plus one ACK frame plus 3 x SIFS | |
758 | * CTS: duration of immediately previous RTS minus time | |
759 | * required to transmit CTS and its SIFS | |
760 | * ACK: 0 if immediately previous directed data/mgmt had | |
761 | * more=0, with more=1 duration in ACK frame is duration | |
762 | * from previous frame minus time needed to transmit ACK | |
763 | * and its SIFS | |
764 | * PS Poll: BIT(15) | BIT(14) | aid | |
765 | */ | |
766 | return 0; | |
767 | } | |
768 | ||
769 | /* data/mgmt */ | |
770 | if (0 /* FIX: data/mgmt during CFP */) | |
771 | return 32768; | |
772 | ||
773 | if (group_addr) /* Group address as the destination - no ACK */ | |
774 | return 0; | |
775 | ||
776 | /* Individual destination address: | |
777 | * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes) | |
778 | * CTS and ACK frames shall be transmitted using the highest rate in | |
779 | * basic rate set that is less than or equal to the rate of the | |
780 | * immediately previous frame and that is using the same modulation | |
781 | * (CCK or OFDM). If no basic rate set matches with these requirements, | |
782 | * the highest mandatory rate of the PHY that is less than or equal to | |
783 | * the rate of the previous frame is used. | |
784 | * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps | |
785 | */ | |
786 | rate = -1; | |
787 | mrate = 10; /* use 1 Mbps if everything fails */ | |
788 | for (i = 0; i < mode->num_rates; i++) { | |
789 | struct ieee80211_rate *r = &mode->rates[i]; | |
790 | if (r->rate > txrate->rate) | |
791 | break; | |
792 | ||
793 | if (IEEE80211_RATE_MODULATION(txrate->flags) != | |
794 | IEEE80211_RATE_MODULATION(r->flags)) | |
795 | continue; | |
796 | ||
797 | if (r->flags & IEEE80211_RATE_BASIC) | |
798 | rate = r->rate; | |
799 | else if (r->flags & IEEE80211_RATE_MANDATORY) | |
800 | mrate = r->rate; | |
801 | } | |
802 | if (rate == -1) { | |
803 | /* No matching basic rate found; use highest suitable mandatory | |
804 | * PHY rate */ | |
805 | rate = mrate; | |
806 | } | |
807 | ||
808 | /* Time needed to transmit ACK | |
809 | * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up | |
810 | * to closest integer */ | |
811 | ||
812 | dur = ieee80211_frame_duration(local, 10, rate, erp, | |
813 | local->short_preamble); | |
814 | ||
815 | if (next_frag_len) { | |
816 | /* Frame is fragmented: duration increases with time needed to | |
817 | * transmit next fragment plus ACK and 2 x SIFS. */ | |
818 | dur *= 2; /* ACK + SIFS */ | |
819 | /* next fragment */ | |
820 | dur += ieee80211_frame_duration(local, next_frag_len, | |
821 | txrate->rate, erp, | |
822 | local->short_preamble); | |
823 | } | |
824 | ||
825 | return dur; | |
826 | } | |
827 | ||
828 | ||
829 | static ieee80211_txrx_result | |
830 | ieee80211_tx_h_misc(struct ieee80211_txrx_data *tx) | |
831 | { | |
832 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data; | |
833 | u16 dur; | |
834 | struct ieee80211_tx_control *control = tx->u.tx.control; | |
835 | struct ieee80211_hw_mode *mode = tx->u.tx.mode; | |
836 | ||
837 | if (!is_multicast_ether_addr(hdr->addr1)) { | |
838 | if (tx->skb->len + FCS_LEN > tx->local->rts_threshold && | |
839 | tx->local->rts_threshold < IEEE80211_MAX_RTS_THRESHOLD) { | |
840 | control->flags |= IEEE80211_TXCTL_USE_RTS_CTS; | |
841 | control->retry_limit = | |
842 | tx->local->long_retry_limit; | |
843 | } else { | |
844 | control->retry_limit = | |
845 | tx->local->short_retry_limit; | |
846 | } | |
847 | } else { | |
848 | control->retry_limit = 1; | |
849 | } | |
850 | ||
851 | if (tx->fragmented) { | |
852 | /* Do not use multiple retry rates when sending fragmented | |
853 | * frames. | |
854 | * TODO: The last fragment could still use multiple retry | |
855 | * rates. */ | |
856 | control->alt_retry_rate = -1; | |
857 | } | |
858 | ||
859 | /* Use CTS protection for unicast frames sent using extended rates if | |
860 | * there are associated non-ERP stations and RTS/CTS is not configured | |
861 | * for the frame. */ | |
862 | if (mode->mode == MODE_IEEE80211G && | |
863 | (tx->u.tx.rate->flags & IEEE80211_RATE_ERP) && | |
63fc33ce | 864 | tx->u.tx.unicast && tx->sdata->use_protection && |
f0706e82 JB |
865 | !(control->flags & IEEE80211_TXCTL_USE_RTS_CTS)) |
866 | control->flags |= IEEE80211_TXCTL_USE_CTS_PROTECT; | |
867 | ||
868 | /* Setup duration field for the first fragment of the frame. Duration | |
869 | * for remaining fragments will be updated when they are being sent | |
870 | * to low-level driver in ieee80211_tx(). */ | |
871 | dur = ieee80211_duration(tx, is_multicast_ether_addr(hdr->addr1), | |
872 | tx->fragmented ? tx->u.tx.extra_frag[0]->len : | |
873 | 0); | |
874 | hdr->duration_id = cpu_to_le16(dur); | |
875 | ||
876 | if ((control->flags & IEEE80211_TXCTL_USE_RTS_CTS) || | |
877 | (control->flags & IEEE80211_TXCTL_USE_CTS_PROTECT)) { | |
878 | struct ieee80211_rate *rate; | |
879 | ||
880 | /* Do not use multiple retry rates when using RTS/CTS */ | |
881 | control->alt_retry_rate = -1; | |
882 | ||
883 | /* Use min(data rate, max base rate) as CTS/RTS rate */ | |
884 | rate = tx->u.tx.rate; | |
885 | while (rate > mode->rates && | |
886 | !(rate->flags & IEEE80211_RATE_BASIC)) | |
887 | rate--; | |
888 | ||
889 | control->rts_cts_rate = rate->val; | |
890 | control->rts_rate = rate; | |
891 | } | |
892 | ||
893 | if (tx->sta) { | |
894 | tx->sta->tx_packets++; | |
895 | tx->sta->tx_fragments++; | |
896 | tx->sta->tx_bytes += tx->skb->len; | |
897 | if (tx->u.tx.extra_frag) { | |
898 | int i; | |
899 | tx->sta->tx_fragments += tx->u.tx.num_extra_frag; | |
900 | for (i = 0; i < tx->u.tx.num_extra_frag; i++) { | |
901 | tx->sta->tx_bytes += | |
902 | tx->u.tx.extra_frag[i]->len; | |
903 | } | |
904 | } | |
905 | } | |
906 | ||
907 | return TXRX_CONTINUE; | |
908 | } | |
909 | ||
910 | ||
911 | static ieee80211_txrx_result | |
912 | ieee80211_tx_h_check_assoc(struct ieee80211_txrx_data *tx) | |
913 | { | |
914 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
915 | struct sk_buff *skb = tx->skb; | |
916 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
917 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ | |
918 | u32 sta_flags; | |
919 | ||
920 | if (unlikely(tx->local->sta_scanning != 0) && | |
921 | ((tx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT || | |
922 | (tx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_PROBE_REQ)) | |
923 | return TXRX_DROP; | |
924 | ||
925 | if (tx->u.tx.ps_buffered) | |
926 | return TXRX_CONTINUE; | |
927 | ||
928 | sta_flags = tx->sta ? tx->sta->flags : 0; | |
929 | ||
930 | if (likely(tx->u.tx.unicast)) { | |
931 | if (unlikely(!(sta_flags & WLAN_STA_ASSOC) && | |
932 | tx->sdata->type != IEEE80211_IF_TYPE_IBSS && | |
933 | (tx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA)) { | |
934 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
935 | printk(KERN_DEBUG "%s: dropped data frame to not " | |
936 | "associated station " MAC_FMT "\n", | |
937 | tx->dev->name, MAC_ARG(hdr->addr1)); | |
938 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ | |
939 | I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc); | |
940 | return TXRX_DROP; | |
941 | } | |
942 | } else { | |
943 | if (unlikely((tx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA && | |
944 | tx->local->num_sta == 0 && | |
945 | !tx->local->allow_broadcast_always && | |
946 | tx->sdata->type != IEEE80211_IF_TYPE_IBSS)) { | |
947 | /* | |
948 | * No associated STAs - no need to send multicast | |
949 | * frames. | |
950 | */ | |
951 | return TXRX_DROP; | |
952 | } | |
953 | return TXRX_CONTINUE; | |
954 | } | |
955 | ||
956 | if (unlikely(!tx->u.tx.mgmt_interface && tx->sdata->ieee802_1x && | |
957 | !(sta_flags & WLAN_STA_AUTHORIZED))) { | |
958 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
959 | printk(KERN_DEBUG "%s: dropped frame to " MAC_FMT | |
960 | " (unauthorized port)\n", tx->dev->name, | |
961 | MAC_ARG(hdr->addr1)); | |
962 | #endif | |
963 | I802_DEBUG_INC(tx->local->tx_handlers_drop_unauth_port); | |
964 | return TXRX_DROP; | |
965 | } | |
966 | ||
967 | return TXRX_CONTINUE; | |
968 | } | |
969 | ||
970 | static ieee80211_txrx_result | |
971 | ieee80211_tx_h_sequence(struct ieee80211_txrx_data *tx) | |
972 | { | |
973 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; | |
974 | ||
975 | if (ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_control)) >= 24) | |
976 | ieee80211_include_sequence(tx->sdata, hdr); | |
977 | ||
978 | return TXRX_CONTINUE; | |
979 | } | |
980 | ||
981 | /* This function is called whenever the AP is about to exceed the maximum limit | |
982 | * of buffered frames for power saving STAs. This situation should not really | |
983 | * happen often during normal operation, so dropping the oldest buffered packet | |
984 | * from each queue should be OK to make some room for new frames. */ | |
985 | static void purge_old_ps_buffers(struct ieee80211_local *local) | |
986 | { | |
987 | int total = 0, purged = 0; | |
988 | struct sk_buff *skb; | |
989 | struct ieee80211_sub_if_data *sdata; | |
990 | struct sta_info *sta; | |
991 | ||
992 | read_lock(&local->sub_if_lock); | |
993 | list_for_each_entry(sdata, &local->sub_if_list, list) { | |
994 | struct ieee80211_if_ap *ap; | |
995 | if (sdata->dev == local->mdev || | |
996 | sdata->type != IEEE80211_IF_TYPE_AP) | |
997 | continue; | |
998 | ap = &sdata->u.ap; | |
999 | skb = skb_dequeue(&ap->ps_bc_buf); | |
1000 | if (skb) { | |
1001 | purged++; | |
1002 | dev_kfree_skb(skb); | |
1003 | } | |
1004 | total += skb_queue_len(&ap->ps_bc_buf); | |
1005 | } | |
1006 | read_unlock(&local->sub_if_lock); | |
1007 | ||
1008 | spin_lock_bh(&local->sta_lock); | |
1009 | list_for_each_entry(sta, &local->sta_list, list) { | |
1010 | skb = skb_dequeue(&sta->ps_tx_buf); | |
1011 | if (skb) { | |
1012 | purged++; | |
1013 | dev_kfree_skb(skb); | |
1014 | } | |
1015 | total += skb_queue_len(&sta->ps_tx_buf); | |
1016 | } | |
1017 | spin_unlock_bh(&local->sta_lock); | |
1018 | ||
1019 | local->total_ps_buffered = total; | |
1020 | printk(KERN_DEBUG "%s: PS buffers full - purged %d frames\n", | |
1021 | local->mdev->name, purged); | |
1022 | } | |
1023 | ||
1024 | ||
1025 | static inline ieee80211_txrx_result | |
1026 | ieee80211_tx_h_multicast_ps_buf(struct ieee80211_txrx_data *tx) | |
1027 | { | |
1028 | /* broadcast/multicast frame */ | |
1029 | /* If any of the associated stations is in power save mode, | |
1030 | * the frame is buffered to be sent after DTIM beacon frame */ | |
1031 | if ((tx->local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING) && | |
1032 | tx->sdata->type != IEEE80211_IF_TYPE_WDS && | |
1033 | tx->sdata->bss && atomic_read(&tx->sdata->bss->num_sta_ps) && | |
1034 | !(tx->fc & IEEE80211_FCTL_ORDER)) { | |
1035 | if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER) | |
1036 | purge_old_ps_buffers(tx->local); | |
1037 | if (skb_queue_len(&tx->sdata->bss->ps_bc_buf) >= | |
1038 | AP_MAX_BC_BUFFER) { | |
1039 | if (net_ratelimit()) { | |
1040 | printk(KERN_DEBUG "%s: BC TX buffer full - " | |
1041 | "dropping the oldest frame\n", | |
1042 | tx->dev->name); | |
1043 | } | |
1044 | dev_kfree_skb(skb_dequeue(&tx->sdata->bss->ps_bc_buf)); | |
1045 | } else | |
1046 | tx->local->total_ps_buffered++; | |
1047 | skb_queue_tail(&tx->sdata->bss->ps_bc_buf, tx->skb); | |
1048 | return TXRX_QUEUED; | |
1049 | } | |
1050 | ||
1051 | return TXRX_CONTINUE; | |
1052 | } | |
1053 | ||
1054 | ||
1055 | static inline ieee80211_txrx_result | |
1056 | ieee80211_tx_h_unicast_ps_buf(struct ieee80211_txrx_data *tx) | |
1057 | { | |
1058 | struct sta_info *sta = tx->sta; | |
1059 | ||
1060 | if (unlikely(!sta || | |
1061 | ((tx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT && | |
1062 | (tx->fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP))) | |
1063 | return TXRX_CONTINUE; | |
1064 | ||
1065 | if (unlikely((sta->flags & WLAN_STA_PS) && !sta->pspoll)) { | |
1066 | struct ieee80211_tx_packet_data *pkt_data; | |
1067 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG | |
1068 | printk(KERN_DEBUG "STA " MAC_FMT " aid %d: PS buffer (entries " | |
1069 | "before %d)\n", | |
1070 | MAC_ARG(sta->addr), sta->aid, | |
1071 | skb_queue_len(&sta->ps_tx_buf)); | |
1072 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ | |
1073 | sta->flags |= WLAN_STA_TIM; | |
1074 | if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER) | |
1075 | purge_old_ps_buffers(tx->local); | |
1076 | if (skb_queue_len(&sta->ps_tx_buf) >= STA_MAX_TX_BUFFER) { | |
1077 | struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf); | |
1078 | if (net_ratelimit()) { | |
1079 | printk(KERN_DEBUG "%s: STA " MAC_FMT " TX " | |
1080 | "buffer full - dropping oldest frame\n", | |
1081 | tx->dev->name, MAC_ARG(sta->addr)); | |
1082 | } | |
1083 | dev_kfree_skb(old); | |
1084 | } else | |
1085 | tx->local->total_ps_buffered++; | |
1086 | /* Queue frame to be sent after STA sends an PS Poll frame */ | |
1087 | if (skb_queue_empty(&sta->ps_tx_buf)) { | |
1088 | if (tx->local->ops->set_tim) | |
1089 | tx->local->ops->set_tim(local_to_hw(tx->local), | |
1090 | sta->aid, 1); | |
1091 | if (tx->sdata->bss) | |
1092 | bss_tim_set(tx->local, tx->sdata->bss, sta->aid); | |
1093 | } | |
1094 | pkt_data = (struct ieee80211_tx_packet_data *)tx->skb->cb; | |
1095 | pkt_data->jiffies = jiffies; | |
1096 | skb_queue_tail(&sta->ps_tx_buf, tx->skb); | |
1097 | return TXRX_QUEUED; | |
1098 | } | |
1099 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG | |
1100 | else if (unlikely(sta->flags & WLAN_STA_PS)) { | |
1101 | printk(KERN_DEBUG "%s: STA " MAC_FMT " in PS mode, but pspoll " | |
1102 | "set -> send frame\n", tx->dev->name, | |
1103 | MAC_ARG(sta->addr)); | |
1104 | } | |
1105 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ | |
1106 | sta->pspoll = 0; | |
1107 | ||
1108 | return TXRX_CONTINUE; | |
1109 | } | |
1110 | ||
1111 | ||
1112 | static ieee80211_txrx_result | |
1113 | ieee80211_tx_h_ps_buf(struct ieee80211_txrx_data *tx) | |
1114 | { | |
1115 | if (unlikely(tx->u.tx.ps_buffered)) | |
1116 | return TXRX_CONTINUE; | |
1117 | ||
1118 | if (tx->u.tx.unicast) | |
1119 | return ieee80211_tx_h_unicast_ps_buf(tx); | |
1120 | else | |
1121 | return ieee80211_tx_h_multicast_ps_buf(tx); | |
1122 | } | |
1123 | ||
1124 | ||
e4c967c6 AG |
1125 | /* |
1126 | * deal with packet injection down monitor interface | |
1127 | * with Radiotap Header -- only called for monitor mode interface | |
1128 | */ | |
1129 | ||
1130 | static ieee80211_txrx_result | |
1131 | __ieee80211_parse_tx_radiotap( | |
1132 | struct ieee80211_txrx_data *tx, | |
1133 | struct sk_buff *skb, struct ieee80211_tx_control *control) | |
1134 | { | |
1135 | /* | |
1136 | * this is the moment to interpret and discard the radiotap header that | |
1137 | * must be at the start of the packet injected in Monitor mode | |
1138 | * | |
1139 | * Need to take some care with endian-ness since radiotap | |
1140 | * args are little-endian | |
1141 | */ | |
1142 | ||
1143 | struct ieee80211_radiotap_iterator iterator; | |
1144 | struct ieee80211_radiotap_header *rthdr = | |
1145 | (struct ieee80211_radiotap_header *) skb->data; | |
1146 | struct ieee80211_hw_mode *mode = tx->local->hw.conf.mode; | |
1147 | int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len); | |
1148 | ||
1149 | /* | |
1150 | * default control situation for all injected packets | |
1151 | * FIXME: this does not suit all usage cases, expand to allow control | |
1152 | */ | |
1153 | ||
1154 | control->retry_limit = 1; /* no retry */ | |
1155 | control->key_idx = -1; /* no encryption key */ | |
1156 | control->flags &= ~(IEEE80211_TXCTL_USE_RTS_CTS | | |
1157 | IEEE80211_TXCTL_USE_CTS_PROTECT); | |
1158 | control->flags |= IEEE80211_TXCTL_DO_NOT_ENCRYPT | | |
1159 | IEEE80211_TXCTL_NO_ACK; | |
1160 | control->antenna_sel_tx = 0; /* default to default antenna */ | |
1161 | ||
1162 | /* | |
1163 | * for every radiotap entry that is present | |
1164 | * (ieee80211_radiotap_iterator_next returns -ENOENT when no more | |
1165 | * entries present, or -EINVAL on error) | |
1166 | */ | |
1167 | ||
1168 | while (!ret) { | |
1169 | int i, target_rate; | |
1170 | ||
1171 | ret = ieee80211_radiotap_iterator_next(&iterator); | |
1172 | ||
1173 | if (ret) | |
1174 | continue; | |
1175 | ||
1176 | /* see if this argument is something we can use */ | |
1177 | switch (iterator.this_arg_index) { | |
1178 | /* | |
1179 | * You must take care when dereferencing iterator.this_arg | |
1180 | * for multibyte types... the pointer is not aligned. Use | |
1181 | * get_unaligned((type *)iterator.this_arg) to dereference | |
1182 | * iterator.this_arg for type "type" safely on all arches. | |
1183 | */ | |
1184 | case IEEE80211_RADIOTAP_RATE: | |
1185 | /* | |
1186 | * radiotap rate u8 is in 500kbps units eg, 0x02=1Mbps | |
1187 | * ieee80211 rate int is in 100kbps units eg, 0x0a=1Mbps | |
1188 | */ | |
1189 | target_rate = (*iterator.this_arg) * 5; | |
1190 | for (i = 0; i < mode->num_rates; i++) { | |
1191 | struct ieee80211_rate *r = &mode->rates[i]; | |
1192 | ||
1193 | if (r->rate > target_rate) | |
1194 | continue; | |
1195 | ||
1196 | control->rate = r; | |
1197 | ||
1198 | if (r->flags & IEEE80211_RATE_PREAMBLE2) | |
1199 | control->tx_rate = r->val2; | |
1200 | else | |
1201 | control->tx_rate = r->val; | |
1202 | ||
1203 | /* end on exact match */ | |
1204 | if (r->rate == target_rate) | |
1205 | i = mode->num_rates; | |
1206 | } | |
1207 | break; | |
1208 | ||
1209 | case IEEE80211_RADIOTAP_ANTENNA: | |
1210 | /* | |
1211 | * radiotap uses 0 for 1st ant, mac80211 is 1 for | |
1212 | * 1st ant | |
1213 | */ | |
1214 | control->antenna_sel_tx = (*iterator.this_arg) + 1; | |
1215 | break; | |
1216 | ||
1217 | case IEEE80211_RADIOTAP_DBM_TX_POWER: | |
1218 | control->power_level = *iterator.this_arg; | |
1219 | break; | |
1220 | ||
1221 | case IEEE80211_RADIOTAP_FLAGS: | |
1222 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) { | |
1223 | /* | |
1224 | * this indicates that the skb we have been | |
1225 | * handed has the 32-bit FCS CRC at the end... | |
1226 | * we should react to that by snipping it off | |
1227 | * because it will be recomputed and added | |
1228 | * on transmission | |
1229 | */ | |
1230 | if (skb->len < (iterator.max_length + FCS_LEN)) | |
1231 | return TXRX_DROP; | |
1232 | ||
1233 | skb_trim(skb, skb->len - FCS_LEN); | |
1234 | } | |
1235 | break; | |
1236 | ||
1237 | default: | |
1238 | break; | |
1239 | } | |
1240 | } | |
1241 | ||
1242 | if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */ | |
1243 | return TXRX_DROP; | |
1244 | ||
1245 | /* | |
1246 | * remove the radiotap header | |
1247 | * iterator->max_length was sanity-checked against | |
1248 | * skb->len by iterator init | |
1249 | */ | |
1250 | skb_pull(skb, iterator.max_length); | |
1251 | ||
1252 | return TXRX_CONTINUE; | |
1253 | } | |
1254 | ||
1255 | ||
1256 | static ieee80211_txrx_result inline | |
f0706e82 JB |
1257 | __ieee80211_tx_prepare(struct ieee80211_txrx_data *tx, |
1258 | struct sk_buff *skb, | |
1259 | struct net_device *dev, | |
1260 | struct ieee80211_tx_control *control) | |
1261 | { | |
1262 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1263 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
e4c967c6 AG |
1264 | struct ieee80211_sub_if_data *sdata; |
1265 | ieee80211_txrx_result res = TXRX_CONTINUE; | |
1266 | ||
f0706e82 JB |
1267 | int hdrlen; |
1268 | ||
1269 | memset(tx, 0, sizeof(*tx)); | |
1270 | tx->skb = skb; | |
1271 | tx->dev = dev; /* use original interface */ | |
1272 | tx->local = local; | |
1273 | tx->sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1274 | tx->sta = sta_info_get(local, hdr->addr1); | |
1275 | tx->fc = le16_to_cpu(hdr->frame_control); | |
e4c967c6 AG |
1276 | |
1277 | /* | |
1278 | * set defaults for things that can be set by | |
1279 | * injected radiotap headers | |
1280 | */ | |
f0706e82 | 1281 | control->power_level = local->hw.conf.power_level; |
e4c967c6 AG |
1282 | control->antenna_sel_tx = local->hw.conf.antenna_sel_tx; |
1283 | if (local->sta_antenna_sel != STA_ANTENNA_SEL_AUTO && tx->sta) | |
1284 | control->antenna_sel_tx = tx->sta->antenna_sel_tx; | |
1285 | ||
1286 | /* process and remove the injection radiotap header */ | |
1287 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1288 | if (unlikely(sdata->type == IEEE80211_IF_TYPE_MNTR)) { | |
1289 | if (__ieee80211_parse_tx_radiotap(tx, skb, control) == | |
1290 | TXRX_DROP) { | |
1291 | return TXRX_DROP; | |
1292 | } | |
1293 | /* | |
1294 | * we removed the radiotap header after this point, | |
1295 | * we filled control with what we could use | |
1296 | * set to the actual ieee header now | |
1297 | */ | |
1298 | hdr = (struct ieee80211_hdr *) skb->data; | |
1299 | res = TXRX_QUEUED; /* indication it was monitor packet */ | |
1300 | } | |
1301 | ||
f0706e82 JB |
1302 | tx->u.tx.control = control; |
1303 | tx->u.tx.unicast = !is_multicast_ether_addr(hdr->addr1); | |
1304 | if (is_multicast_ether_addr(hdr->addr1)) | |
1305 | control->flags |= IEEE80211_TXCTL_NO_ACK; | |
1306 | else | |
1307 | control->flags &= ~IEEE80211_TXCTL_NO_ACK; | |
1308 | tx->fragmented = local->fragmentation_threshold < | |
1309 | IEEE80211_MAX_FRAG_THRESHOLD && tx->u.tx.unicast && | |
1310 | skb->len + FCS_LEN > local->fragmentation_threshold && | |
1311 | (!local->ops->set_frag_threshold); | |
1312 | if (!tx->sta) | |
1313 | control->flags |= IEEE80211_TXCTL_CLEAR_DST_MASK; | |
1314 | else if (tx->sta->clear_dst_mask) { | |
1315 | control->flags |= IEEE80211_TXCTL_CLEAR_DST_MASK; | |
1316 | tx->sta->clear_dst_mask = 0; | |
1317 | } | |
f0706e82 JB |
1318 | hdrlen = ieee80211_get_hdrlen(tx->fc); |
1319 | if (skb->len > hdrlen + sizeof(rfc1042_header) + 2) { | |
1320 | u8 *pos = &skb->data[hdrlen + sizeof(rfc1042_header)]; | |
1321 | tx->ethertype = (pos[0] << 8) | pos[1]; | |
1322 | } | |
1323 | control->flags |= IEEE80211_TXCTL_FIRST_FRAGMENT; | |
1324 | ||
e4c967c6 | 1325 | return res; |
f0706e82 JB |
1326 | } |
1327 | ||
1328 | static int inline is_ieee80211_device(struct net_device *dev, | |
1329 | struct net_device *master) | |
1330 | { | |
1331 | return (wdev_priv(dev->ieee80211_ptr) == | |
1332 | wdev_priv(master->ieee80211_ptr)); | |
1333 | } | |
1334 | ||
1335 | /* Device in tx->dev has a reference added; use dev_put(tx->dev) when | |
1336 | * finished with it. */ | |
1337 | static int inline ieee80211_tx_prepare(struct ieee80211_txrx_data *tx, | |
1338 | struct sk_buff *skb, | |
1339 | struct net_device *mdev, | |
1340 | struct ieee80211_tx_control *control) | |
1341 | { | |
1342 | struct ieee80211_tx_packet_data *pkt_data; | |
1343 | struct net_device *dev; | |
1344 | ||
1345 | pkt_data = (struct ieee80211_tx_packet_data *)skb->cb; | |
1346 | dev = dev_get_by_index(pkt_data->ifindex); | |
1347 | if (unlikely(dev && !is_ieee80211_device(dev, mdev))) { | |
1348 | dev_put(dev); | |
1349 | dev = NULL; | |
1350 | } | |
1351 | if (unlikely(!dev)) | |
1352 | return -ENODEV; | |
1353 | __ieee80211_tx_prepare(tx, skb, dev, control); | |
1354 | return 0; | |
1355 | } | |
1356 | ||
1357 | static inline int __ieee80211_queue_stopped(const struct ieee80211_local *local, | |
1358 | int queue) | |
1359 | { | |
1360 | return test_bit(IEEE80211_LINK_STATE_XOFF, &local->state[queue]); | |
1361 | } | |
1362 | ||
1363 | static inline int __ieee80211_queue_pending(const struct ieee80211_local *local, | |
1364 | int queue) | |
1365 | { | |
1366 | return test_bit(IEEE80211_LINK_STATE_PENDING, &local->state[queue]); | |
1367 | } | |
1368 | ||
1369 | #define IEEE80211_TX_OK 0 | |
1370 | #define IEEE80211_TX_AGAIN 1 | |
1371 | #define IEEE80211_TX_FRAG_AGAIN 2 | |
1372 | ||
1373 | static int __ieee80211_tx(struct ieee80211_local *local, struct sk_buff *skb, | |
1374 | struct ieee80211_txrx_data *tx) | |
1375 | { | |
1376 | struct ieee80211_tx_control *control = tx->u.tx.control; | |
1377 | int ret, i; | |
1378 | ||
1379 | if (!ieee80211_qdisc_installed(local->mdev) && | |
1380 | __ieee80211_queue_stopped(local, 0)) { | |
1381 | netif_stop_queue(local->mdev); | |
1382 | return IEEE80211_TX_AGAIN; | |
1383 | } | |
1384 | if (skb) { | |
1385 | ieee80211_dump_frame(local->mdev->name, "TX to low-level driver", skb); | |
1386 | ret = local->ops->tx(local_to_hw(local), skb, control); | |
1387 | if (ret) | |
1388 | return IEEE80211_TX_AGAIN; | |
1389 | local->mdev->trans_start = jiffies; | |
1390 | ieee80211_led_tx(local, 1); | |
1391 | } | |
1392 | if (tx->u.tx.extra_frag) { | |
1393 | control->flags &= ~(IEEE80211_TXCTL_USE_RTS_CTS | | |
1394 | IEEE80211_TXCTL_USE_CTS_PROTECT | | |
1395 | IEEE80211_TXCTL_CLEAR_DST_MASK | | |
1396 | IEEE80211_TXCTL_FIRST_FRAGMENT); | |
1397 | for (i = 0; i < tx->u.tx.num_extra_frag; i++) { | |
1398 | if (!tx->u.tx.extra_frag[i]) | |
1399 | continue; | |
1400 | if (__ieee80211_queue_stopped(local, control->queue)) | |
1401 | return IEEE80211_TX_FRAG_AGAIN; | |
1402 | if (i == tx->u.tx.num_extra_frag) { | |
1403 | control->tx_rate = tx->u.tx.last_frag_hwrate; | |
1404 | control->rate = tx->u.tx.last_frag_rate; | |
1405 | if (tx->u.tx.probe_last_frag) | |
1406 | control->flags |= | |
1407 | IEEE80211_TXCTL_RATE_CTRL_PROBE; | |
1408 | else | |
1409 | control->flags &= | |
1410 | ~IEEE80211_TXCTL_RATE_CTRL_PROBE; | |
1411 | } | |
1412 | ||
1413 | ieee80211_dump_frame(local->mdev->name, | |
1414 | "TX to low-level driver", | |
1415 | tx->u.tx.extra_frag[i]); | |
1416 | ret = local->ops->tx(local_to_hw(local), | |
1417 | tx->u.tx.extra_frag[i], | |
1418 | control); | |
1419 | if (ret) | |
1420 | return IEEE80211_TX_FRAG_AGAIN; | |
1421 | local->mdev->trans_start = jiffies; | |
1422 | ieee80211_led_tx(local, 1); | |
1423 | tx->u.tx.extra_frag[i] = NULL; | |
1424 | } | |
1425 | kfree(tx->u.tx.extra_frag); | |
1426 | tx->u.tx.extra_frag = NULL; | |
1427 | } | |
1428 | return IEEE80211_TX_OK; | |
1429 | } | |
1430 | ||
1431 | static int ieee80211_tx(struct net_device *dev, struct sk_buff *skb, | |
1432 | struct ieee80211_tx_control *control, int mgmt) | |
1433 | { | |
1434 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1435 | struct sta_info *sta; | |
1436 | ieee80211_tx_handler *handler; | |
1437 | struct ieee80211_txrx_data tx; | |
e4c967c6 | 1438 | ieee80211_txrx_result res = TXRX_DROP, res_prepare; |
f0706e82 JB |
1439 | int ret, i; |
1440 | ||
1441 | WARN_ON(__ieee80211_queue_pending(local, control->queue)); | |
1442 | ||
1443 | if (unlikely(skb->len < 10)) { | |
1444 | dev_kfree_skb(skb); | |
1445 | return 0; | |
1446 | } | |
1447 | ||
e4c967c6 AG |
1448 | res_prepare = __ieee80211_tx_prepare(&tx, skb, dev, control); |
1449 | ||
1450 | if (res_prepare == TXRX_DROP) { | |
1451 | dev_kfree_skb(skb); | |
1452 | return 0; | |
1453 | } | |
1454 | ||
f0706e82 JB |
1455 | sta = tx.sta; |
1456 | tx.u.tx.mgmt_interface = mgmt; | |
1457 | tx.u.tx.mode = local->hw.conf.mode; | |
1458 | ||
e4c967c6 AG |
1459 | if (res_prepare == TXRX_QUEUED) { /* if it was an injected packet */ |
1460 | res = TXRX_CONTINUE; | |
1461 | } else { | |
1462 | for (handler = local->tx_handlers; *handler != NULL; | |
1463 | handler++) { | |
1464 | res = (*handler)(&tx); | |
1465 | if (res != TXRX_CONTINUE) | |
1466 | break; | |
1467 | } | |
f0706e82 JB |
1468 | } |
1469 | ||
1470 | skb = tx.skb; /* handlers are allowed to change skb */ | |
1471 | ||
1472 | if (sta) | |
1473 | sta_info_put(sta); | |
1474 | ||
1475 | if (unlikely(res == TXRX_DROP)) { | |
1476 | I802_DEBUG_INC(local->tx_handlers_drop); | |
1477 | goto drop; | |
1478 | } | |
1479 | ||
1480 | if (unlikely(res == TXRX_QUEUED)) { | |
1481 | I802_DEBUG_INC(local->tx_handlers_queued); | |
1482 | return 0; | |
1483 | } | |
1484 | ||
1485 | if (tx.u.tx.extra_frag) { | |
1486 | for (i = 0; i < tx.u.tx.num_extra_frag; i++) { | |
1487 | int next_len, dur; | |
1488 | struct ieee80211_hdr *hdr = | |
1489 | (struct ieee80211_hdr *) | |
1490 | tx.u.tx.extra_frag[i]->data; | |
1491 | ||
1492 | if (i + 1 < tx.u.tx.num_extra_frag) { | |
1493 | next_len = tx.u.tx.extra_frag[i + 1]->len; | |
1494 | } else { | |
1495 | next_len = 0; | |
1496 | tx.u.tx.rate = tx.u.tx.last_frag_rate; | |
1497 | tx.u.tx.last_frag_hwrate = tx.u.tx.rate->val; | |
1498 | } | |
1499 | dur = ieee80211_duration(&tx, 0, next_len); | |
1500 | hdr->duration_id = cpu_to_le16(dur); | |
1501 | } | |
1502 | } | |
1503 | ||
1504 | retry: | |
1505 | ret = __ieee80211_tx(local, skb, &tx); | |
1506 | if (ret) { | |
1507 | struct ieee80211_tx_stored_packet *store = | |
1508 | &local->pending_packet[control->queue]; | |
1509 | ||
1510 | if (ret == IEEE80211_TX_FRAG_AGAIN) | |
1511 | skb = NULL; | |
1512 | set_bit(IEEE80211_LINK_STATE_PENDING, | |
1513 | &local->state[control->queue]); | |
1514 | smp_mb(); | |
1515 | /* When the driver gets out of buffers during sending of | |
1516 | * fragments and calls ieee80211_stop_queue, there is | |
1517 | * a small window between IEEE80211_LINK_STATE_XOFF and | |
1518 | * IEEE80211_LINK_STATE_PENDING flags are set. If a buffer | |
1519 | * gets available in that window (i.e. driver calls | |
1520 | * ieee80211_wake_queue), we would end up with ieee80211_tx | |
1521 | * called with IEEE80211_LINK_STATE_PENDING. Prevent this by | |
1522 | * continuing transmitting here when that situation is | |
1523 | * possible to have happened. */ | |
1524 | if (!__ieee80211_queue_stopped(local, control->queue)) { | |
1525 | clear_bit(IEEE80211_LINK_STATE_PENDING, | |
1526 | &local->state[control->queue]); | |
1527 | goto retry; | |
1528 | } | |
1529 | memcpy(&store->control, control, | |
1530 | sizeof(struct ieee80211_tx_control)); | |
1531 | store->skb = skb; | |
1532 | store->extra_frag = tx.u.tx.extra_frag; | |
1533 | store->num_extra_frag = tx.u.tx.num_extra_frag; | |
1534 | store->last_frag_hwrate = tx.u.tx.last_frag_hwrate; | |
1535 | store->last_frag_rate = tx.u.tx.last_frag_rate; | |
1536 | store->last_frag_rate_ctrl_probe = tx.u.tx.probe_last_frag; | |
1537 | } | |
1538 | return 0; | |
1539 | ||
1540 | drop: | |
1541 | if (skb) | |
1542 | dev_kfree_skb(skb); | |
1543 | for (i = 0; i < tx.u.tx.num_extra_frag; i++) | |
1544 | if (tx.u.tx.extra_frag[i]) | |
1545 | dev_kfree_skb(tx.u.tx.extra_frag[i]); | |
1546 | kfree(tx.u.tx.extra_frag); | |
1547 | return 0; | |
1548 | } | |
1549 | ||
1550 | static void ieee80211_tx_pending(unsigned long data) | |
1551 | { | |
1552 | struct ieee80211_local *local = (struct ieee80211_local *)data; | |
1553 | struct net_device *dev = local->mdev; | |
1554 | struct ieee80211_tx_stored_packet *store; | |
1555 | struct ieee80211_txrx_data tx; | |
1556 | int i, ret, reschedule = 0; | |
1557 | ||
1558 | netif_tx_lock_bh(dev); | |
1559 | for (i = 0; i < local->hw.queues; i++) { | |
1560 | if (__ieee80211_queue_stopped(local, i)) | |
1561 | continue; | |
1562 | if (!__ieee80211_queue_pending(local, i)) { | |
1563 | reschedule = 1; | |
1564 | continue; | |
1565 | } | |
1566 | store = &local->pending_packet[i]; | |
1567 | tx.u.tx.control = &store->control; | |
1568 | tx.u.tx.extra_frag = store->extra_frag; | |
1569 | tx.u.tx.num_extra_frag = store->num_extra_frag; | |
1570 | tx.u.tx.last_frag_hwrate = store->last_frag_hwrate; | |
1571 | tx.u.tx.last_frag_rate = store->last_frag_rate; | |
1572 | tx.u.tx.probe_last_frag = store->last_frag_rate_ctrl_probe; | |
1573 | ret = __ieee80211_tx(local, store->skb, &tx); | |
1574 | if (ret) { | |
1575 | if (ret == IEEE80211_TX_FRAG_AGAIN) | |
1576 | store->skb = NULL; | |
1577 | } else { | |
1578 | clear_bit(IEEE80211_LINK_STATE_PENDING, | |
1579 | &local->state[i]); | |
1580 | reschedule = 1; | |
1581 | } | |
1582 | } | |
1583 | netif_tx_unlock_bh(dev); | |
1584 | if (reschedule) { | |
1585 | if (!ieee80211_qdisc_installed(dev)) { | |
1586 | if (!__ieee80211_queue_stopped(local, 0)) | |
1587 | netif_wake_queue(dev); | |
1588 | } else | |
1589 | netif_schedule(dev); | |
1590 | } | |
1591 | } | |
1592 | ||
1593 | static void ieee80211_clear_tx_pending(struct ieee80211_local *local) | |
1594 | { | |
1595 | int i, j; | |
1596 | struct ieee80211_tx_stored_packet *store; | |
1597 | ||
1598 | for (i = 0; i < local->hw.queues; i++) { | |
1599 | if (!__ieee80211_queue_pending(local, i)) | |
1600 | continue; | |
1601 | store = &local->pending_packet[i]; | |
1602 | kfree_skb(store->skb); | |
1603 | for (j = 0; j < store->num_extra_frag; j++) | |
1604 | kfree_skb(store->extra_frag[j]); | |
1605 | kfree(store->extra_frag); | |
1606 | clear_bit(IEEE80211_LINK_STATE_PENDING, &local->state[i]); | |
1607 | } | |
1608 | } | |
1609 | ||
1610 | static int ieee80211_master_start_xmit(struct sk_buff *skb, | |
1611 | struct net_device *dev) | |
1612 | { | |
1613 | struct ieee80211_tx_control control; | |
1614 | struct ieee80211_tx_packet_data *pkt_data; | |
1615 | struct net_device *odev = NULL; | |
1616 | struct ieee80211_sub_if_data *osdata; | |
1617 | int headroom; | |
1618 | int ret; | |
1619 | ||
1620 | /* | |
1621 | * copy control out of the skb so other people can use skb->cb | |
1622 | */ | |
1623 | pkt_data = (struct ieee80211_tx_packet_data *)skb->cb; | |
1624 | memset(&control, 0, sizeof(struct ieee80211_tx_control)); | |
1625 | ||
1626 | if (pkt_data->ifindex) | |
1627 | odev = dev_get_by_index(pkt_data->ifindex); | |
1628 | if (unlikely(odev && !is_ieee80211_device(odev, dev))) { | |
1629 | dev_put(odev); | |
1630 | odev = NULL; | |
1631 | } | |
1632 | if (unlikely(!odev)) { | |
1633 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
1634 | printk(KERN_DEBUG "%s: Discarded packet with nonexistent " | |
1635 | "originating device\n", dev->name); | |
1636 | #endif | |
1637 | dev_kfree_skb(skb); | |
1638 | return 0; | |
1639 | } | |
1640 | osdata = IEEE80211_DEV_TO_SUB_IF(odev); | |
1641 | ||
b306f453 | 1642 | headroom = osdata->local->tx_headroom + IEEE80211_ENCRYPT_HEADROOM; |
f0706e82 JB |
1643 | if (skb_headroom(skb) < headroom) { |
1644 | if (pskb_expand_head(skb, headroom, 0, GFP_ATOMIC)) { | |
1645 | dev_kfree_skb(skb); | |
0e7088de | 1646 | dev_put(odev); |
f0706e82 JB |
1647 | return 0; |
1648 | } | |
1649 | } | |
1650 | ||
1651 | control.ifindex = odev->ifindex; | |
1652 | control.type = osdata->type; | |
1653 | if (pkt_data->req_tx_status) | |
1654 | control.flags |= IEEE80211_TXCTL_REQ_TX_STATUS; | |
1655 | if (pkt_data->do_not_encrypt) | |
1656 | control.flags |= IEEE80211_TXCTL_DO_NOT_ENCRYPT; | |
1657 | if (pkt_data->requeue) | |
1658 | control.flags |= IEEE80211_TXCTL_REQUEUE; | |
1659 | control.queue = pkt_data->queue; | |
1660 | ||
1661 | ret = ieee80211_tx(odev, skb, &control, | |
1662 | control.type == IEEE80211_IF_TYPE_MGMT); | |
1663 | dev_put(odev); | |
1664 | ||
1665 | return ret; | |
1666 | } | |
1667 | ||
1668 | ||
40f7cac9 JB |
1669 | int ieee80211_monitor_start_xmit(struct sk_buff *skb, |
1670 | struct net_device *dev) | |
1671 | { | |
1672 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1673 | struct ieee80211_tx_packet_data *pkt_data; | |
1674 | struct ieee80211_radiotap_header *prthdr = | |
1675 | (struct ieee80211_radiotap_header *)skb->data; | |
1676 | u16 len; | |
1677 | ||
1678 | /* | |
1679 | * there must be a radiotap header at the | |
1680 | * start in this case | |
1681 | */ | |
1682 | if (unlikely(prthdr->it_version)) { | |
1683 | /* only version 0 is supported */ | |
1684 | dev_kfree_skb(skb); | |
1685 | return NETDEV_TX_OK; | |
1686 | } | |
1687 | ||
1688 | skb->dev = local->mdev; | |
1689 | ||
1690 | pkt_data = (struct ieee80211_tx_packet_data *)skb->cb; | |
1691 | memset(pkt_data, 0, sizeof(*pkt_data)); | |
1692 | pkt_data->ifindex = dev->ifindex; | |
1693 | pkt_data->mgmt_iface = 0; | |
1694 | pkt_data->do_not_encrypt = 1; | |
1695 | ||
1696 | /* above needed because we set skb device to master */ | |
1697 | ||
1698 | /* | |
1699 | * fix up the pointers accounting for the radiotap | |
1700 | * header still being in there. We are being given | |
1701 | * a precooked IEEE80211 header so no need for | |
1702 | * normal processing | |
1703 | */ | |
1704 | len = le16_to_cpu(get_unaligned(&prthdr->it_len)); | |
1705 | skb_set_mac_header(skb, len); | |
1706 | skb_set_network_header(skb, len + sizeof(struct ieee80211_hdr)); | |
1707 | skb_set_transport_header(skb, len + sizeof(struct ieee80211_hdr)); | |
1708 | ||
1709 | /* | |
1710 | * pass the radiotap header up to | |
1711 | * the next stage intact | |
1712 | */ | |
1713 | dev_queue_xmit(skb); | |
1714 | ||
1715 | return NETDEV_TX_OK; | |
1716 | } | |
1717 | ||
1718 | ||
f0706e82 JB |
1719 | /** |
1720 | * ieee80211_subif_start_xmit - netif start_xmit function for Ethernet-type | |
1721 | * subinterfaces (wlan#, WDS, and VLAN interfaces) | |
1722 | * @skb: packet to be sent | |
1723 | * @dev: incoming interface | |
1724 | * | |
1725 | * Returns: 0 on success (and frees skb in this case) or 1 on failure (skb will | |
1726 | * not be freed, and caller is responsible for either retrying later or freeing | |
1727 | * skb). | |
1728 | * | |
1729 | * This function takes in an Ethernet header and encapsulates it with suitable | |
1730 | * IEEE 802.11 header based on which interface the packet is coming in. The | |
1731 | * encapsulated packet will then be passed to master interface, wlan#.11, for | |
1732 | * transmission (through low-level driver). | |
1733 | */ | |
40f7cac9 JB |
1734 | int ieee80211_subif_start_xmit(struct sk_buff *skb, |
1735 | struct net_device *dev) | |
f0706e82 JB |
1736 | { |
1737 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
1738 | struct ieee80211_tx_packet_data *pkt_data; | |
1739 | struct ieee80211_sub_if_data *sdata; | |
1740 | int ret = 1, head_need; | |
1741 | u16 ethertype, hdrlen, fc; | |
1742 | struct ieee80211_hdr hdr; | |
1743 | const u8 *encaps_data; | |
1744 | int encaps_len, skip_header_bytes; | |
1745 | int nh_pos, h_pos, no_encrypt = 0; | |
1746 | struct sta_info *sta; | |
1747 | ||
1748 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1749 | if (unlikely(skb->len < ETH_HLEN)) { | |
1750 | printk(KERN_DEBUG "%s: short skb (len=%d)\n", | |
1751 | dev->name, skb->len); | |
1752 | ret = 0; | |
1753 | goto fail; | |
1754 | } | |
1755 | ||
1756 | nh_pos = skb_network_header(skb) - skb->data; | |
1757 | h_pos = skb_transport_header(skb) - skb->data; | |
1758 | ||
1759 | /* convert Ethernet header to proper 802.11 header (based on | |
1760 | * operation mode) */ | |
1761 | ethertype = (skb->data[12] << 8) | skb->data[13]; | |
1762 | /* TODO: handling for 802.1x authorized/unauthorized port */ | |
1763 | fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA; | |
1764 | ||
1765 | if (likely(sdata->type == IEEE80211_IF_TYPE_AP || | |
1766 | sdata->type == IEEE80211_IF_TYPE_VLAN)) { | |
1767 | fc |= IEEE80211_FCTL_FROMDS; | |
1768 | /* DA BSSID SA */ | |
1769 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
1770 | memcpy(hdr.addr2, dev->dev_addr, ETH_ALEN); | |
1771 | memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN); | |
1772 | hdrlen = 24; | |
1773 | } else if (sdata->type == IEEE80211_IF_TYPE_WDS) { | |
1774 | fc |= IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS; | |
1775 | /* RA TA DA SA */ | |
1776 | memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN); | |
1777 | memcpy(hdr.addr2, dev->dev_addr, ETH_ALEN); | |
1778 | memcpy(hdr.addr3, skb->data, ETH_ALEN); | |
1779 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); | |
1780 | hdrlen = 30; | |
1781 | } else if (sdata->type == IEEE80211_IF_TYPE_STA) { | |
1782 | fc |= IEEE80211_FCTL_TODS; | |
1783 | /* BSSID SA DA */ | |
1784 | memcpy(hdr.addr1, sdata->u.sta.bssid, ETH_ALEN); | |
1785 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
1786 | memcpy(hdr.addr3, skb->data, ETH_ALEN); | |
1787 | hdrlen = 24; | |
1788 | } else if (sdata->type == IEEE80211_IF_TYPE_IBSS) { | |
1789 | /* DA SA BSSID */ | |
1790 | memcpy(hdr.addr1, skb->data, ETH_ALEN); | |
1791 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); | |
1792 | memcpy(hdr.addr3, sdata->u.sta.bssid, ETH_ALEN); | |
1793 | hdrlen = 24; | |
1794 | } else { | |
1795 | ret = 0; | |
1796 | goto fail; | |
1797 | } | |
1798 | ||
1799 | /* receiver is QoS enabled, use a QoS type frame */ | |
1800 | sta = sta_info_get(local, hdr.addr1); | |
1801 | if (sta) { | |
1802 | if (sta->flags & WLAN_STA_WME) { | |
1803 | fc |= IEEE80211_STYPE_QOS_DATA; | |
1804 | hdrlen += 2; | |
1805 | } | |
1806 | sta_info_put(sta); | |
1807 | } | |
1808 | ||
1809 | hdr.frame_control = cpu_to_le16(fc); | |
1810 | hdr.duration_id = 0; | |
1811 | hdr.seq_ctrl = 0; | |
1812 | ||
1813 | skip_header_bytes = ETH_HLEN; | |
1814 | if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) { | |
1815 | encaps_data = bridge_tunnel_header; | |
1816 | encaps_len = sizeof(bridge_tunnel_header); | |
1817 | skip_header_bytes -= 2; | |
1818 | } else if (ethertype >= 0x600) { | |
1819 | encaps_data = rfc1042_header; | |
1820 | encaps_len = sizeof(rfc1042_header); | |
1821 | skip_header_bytes -= 2; | |
1822 | } else { | |
1823 | encaps_data = NULL; | |
1824 | encaps_len = 0; | |
1825 | } | |
1826 | ||
1827 | skb_pull(skb, skip_header_bytes); | |
1828 | nh_pos -= skip_header_bytes; | |
1829 | h_pos -= skip_header_bytes; | |
1830 | ||
1831 | /* TODO: implement support for fragments so that there is no need to | |
1832 | * reallocate and copy payload; it might be enough to support one | |
1833 | * extra fragment that would be copied in the beginning of the frame | |
1834 | * data.. anyway, it would be nice to include this into skb structure | |
1835 | * somehow | |
1836 | * | |
1837 | * There are few options for this: | |
1838 | * use skb->cb as an extra space for 802.11 header | |
1839 | * allocate new buffer if not enough headroom | |
1840 | * make sure that there is enough headroom in every skb by increasing | |
1841 | * build in headroom in __dev_alloc_skb() (linux/skbuff.h) and | |
1842 | * alloc_skb() (net/core/skbuff.c) | |
1843 | */ | |
b306f453 | 1844 | head_need = hdrlen + encaps_len + local->tx_headroom; |
f0706e82 JB |
1845 | head_need -= skb_headroom(skb); |
1846 | ||
1847 | /* We are going to modify skb data, so make a copy of it if happens to | |
1848 | * be cloned. This could happen, e.g., with Linux bridge code passing | |
1849 | * us broadcast frames. */ | |
1850 | ||
1851 | if (head_need > 0 || skb_cloned(skb)) { | |
1852 | #if 0 | |
1853 | printk(KERN_DEBUG "%s: need to reallocate buffer for %d bytes " | |
1854 | "of headroom\n", dev->name, head_need); | |
1855 | #endif | |
1856 | ||
1857 | if (skb_cloned(skb)) | |
1858 | I802_DEBUG_INC(local->tx_expand_skb_head_cloned); | |
1859 | else | |
1860 | I802_DEBUG_INC(local->tx_expand_skb_head); | |
1861 | /* Since we have to reallocate the buffer, make sure that there | |
1862 | * is enough room for possible WEP IV/ICV and TKIP (8 bytes | |
1863 | * before payload and 12 after). */ | |
1864 | if (pskb_expand_head(skb, (head_need > 0 ? head_need + 8 : 8), | |
1865 | 12, GFP_ATOMIC)) { | |
1866 | printk(KERN_DEBUG "%s: failed to reallocate TX buffer" | |
1867 | "\n", dev->name); | |
1868 | goto fail; | |
1869 | } | |
1870 | } | |
1871 | ||
1872 | if (encaps_data) { | |
1873 | memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len); | |
1874 | nh_pos += encaps_len; | |
1875 | h_pos += encaps_len; | |
1876 | } | |
1877 | memcpy(skb_push(skb, hdrlen), &hdr, hdrlen); | |
1878 | nh_pos += hdrlen; | |
1879 | h_pos += hdrlen; | |
1880 | ||
1881 | pkt_data = (struct ieee80211_tx_packet_data *)skb->cb; | |
1882 | memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data)); | |
40f7cac9 | 1883 | pkt_data->ifindex = dev->ifindex; |
f0706e82 JB |
1884 | pkt_data->mgmt_iface = (sdata->type == IEEE80211_IF_TYPE_MGMT); |
1885 | pkt_data->do_not_encrypt = no_encrypt; | |
1886 | ||
1887 | skb->dev = local->mdev; | |
1888 | sdata->stats.tx_packets++; | |
1889 | sdata->stats.tx_bytes += skb->len; | |
1890 | ||
1891 | /* Update skb pointers to various headers since this modified frame | |
1892 | * is going to go through Linux networking code that may potentially | |
1893 | * need things like pointer to IP header. */ | |
1894 | skb_set_mac_header(skb, 0); | |
1895 | skb_set_network_header(skb, nh_pos); | |
1896 | skb_set_transport_header(skb, h_pos); | |
1897 | ||
1898 | dev->trans_start = jiffies; | |
1899 | dev_queue_xmit(skb); | |
1900 | ||
1901 | return 0; | |
1902 | ||
1903 | fail: | |
1904 | if (!ret) | |
1905 | dev_kfree_skb(skb); | |
1906 | ||
1907 | return ret; | |
1908 | } | |
1909 | ||
1910 | ||
1911 | /* | |
1912 | * This is the transmit routine for the 802.11 type interfaces | |
1913 | * called by upper layers of the linux networking | |
1914 | * stack when it has a frame to transmit | |
1915 | */ | |
1916 | static int | |
1917 | ieee80211_mgmt_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
1918 | { | |
1919 | struct ieee80211_sub_if_data *sdata; | |
1920 | struct ieee80211_tx_packet_data *pkt_data; | |
1921 | struct ieee80211_hdr *hdr; | |
1922 | u16 fc; | |
1923 | ||
1924 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1925 | ||
1926 | if (skb->len < 10) { | |
1927 | dev_kfree_skb(skb); | |
1928 | return 0; | |
1929 | } | |
1930 | ||
b306f453 JB |
1931 | if (skb_headroom(skb) < sdata->local->tx_headroom) { |
1932 | if (pskb_expand_head(skb, sdata->local->tx_headroom, | |
1933 | 0, GFP_ATOMIC)) { | |
f0706e82 JB |
1934 | dev_kfree_skb(skb); |
1935 | return 0; | |
1936 | } | |
1937 | } | |
1938 | ||
1939 | hdr = (struct ieee80211_hdr *) skb->data; | |
1940 | fc = le16_to_cpu(hdr->frame_control); | |
1941 | ||
1942 | pkt_data = (struct ieee80211_tx_packet_data *) skb->cb; | |
1943 | memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data)); | |
1944 | pkt_data->ifindex = sdata->dev->ifindex; | |
1945 | pkt_data->mgmt_iface = (sdata->type == IEEE80211_IF_TYPE_MGMT); | |
1946 | ||
1947 | skb->priority = 20; /* use hardcoded priority for mgmt TX queue */ | |
1948 | skb->dev = sdata->local->mdev; | |
1949 | ||
1950 | /* | |
1951 | * We're using the protocol field of the the frame control header | |
1952 | * to request TX callback for hostapd. BIT(1) is checked. | |
1953 | */ | |
1954 | if ((fc & BIT(1)) == BIT(1)) { | |
1955 | pkt_data->req_tx_status = 1; | |
1956 | fc &= ~BIT(1); | |
1957 | hdr->frame_control = cpu_to_le16(fc); | |
1958 | } | |
1959 | ||
1960 | pkt_data->do_not_encrypt = !(fc & IEEE80211_FCTL_PROTECTED); | |
1961 | ||
1962 | sdata->stats.tx_packets++; | |
1963 | sdata->stats.tx_bytes += skb->len; | |
1964 | ||
1965 | dev_queue_xmit(skb); | |
1966 | ||
1967 | return 0; | |
1968 | } | |
1969 | ||
1970 | ||
1971 | static void ieee80211_beacon_add_tim(struct ieee80211_local *local, | |
1972 | struct ieee80211_if_ap *bss, | |
1973 | struct sk_buff *skb) | |
1974 | { | |
1975 | u8 *pos, *tim; | |
1976 | int aid0 = 0; | |
1977 | int i, have_bits = 0, n1, n2; | |
1978 | ||
1979 | /* Generate bitmap for TIM only if there are any STAs in power save | |
1980 | * mode. */ | |
1981 | spin_lock_bh(&local->sta_lock); | |
1982 | if (atomic_read(&bss->num_sta_ps) > 0) | |
1983 | /* in the hope that this is faster than | |
1984 | * checking byte-for-byte */ | |
1985 | have_bits = !bitmap_empty((unsigned long*)bss->tim, | |
1986 | IEEE80211_MAX_AID+1); | |
1987 | ||
1988 | if (bss->dtim_count == 0) | |
1989 | bss->dtim_count = bss->dtim_period - 1; | |
1990 | else | |
1991 | bss->dtim_count--; | |
1992 | ||
1993 | tim = pos = (u8 *) skb_put(skb, 6); | |
1994 | *pos++ = WLAN_EID_TIM; | |
1995 | *pos++ = 4; | |
1996 | *pos++ = bss->dtim_count; | |
1997 | *pos++ = bss->dtim_period; | |
1998 | ||
1999 | if (bss->dtim_count == 0 && !skb_queue_empty(&bss->ps_bc_buf)) | |
2000 | aid0 = 1; | |
2001 | ||
2002 | if (have_bits) { | |
2003 | /* Find largest even number N1 so that bits numbered 1 through | |
2004 | * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits | |
2005 | * (N2 + 1) x 8 through 2007 are 0. */ | |
2006 | n1 = 0; | |
2007 | for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) { | |
2008 | if (bss->tim[i]) { | |
2009 | n1 = i & 0xfe; | |
2010 | break; | |
2011 | } | |
2012 | } | |
2013 | n2 = n1; | |
2014 | for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) { | |
2015 | if (bss->tim[i]) { | |
2016 | n2 = i; | |
2017 | break; | |
2018 | } | |
2019 | } | |
2020 | ||
2021 | /* Bitmap control */ | |
2022 | *pos++ = n1 | aid0; | |
2023 | /* Part Virt Bitmap */ | |
2024 | memcpy(pos, bss->tim + n1, n2 - n1 + 1); | |
2025 | ||
2026 | tim[1] = n2 - n1 + 4; | |
2027 | skb_put(skb, n2 - n1); | |
2028 | } else { | |
2029 | *pos++ = aid0; /* Bitmap control */ | |
2030 | *pos++ = 0; /* Part Virt Bitmap */ | |
2031 | } | |
2032 | spin_unlock_bh(&local->sta_lock); | |
2033 | } | |
2034 | ||
2035 | ||
2036 | struct sk_buff * ieee80211_beacon_get(struct ieee80211_hw *hw, int if_id, | |
2037 | struct ieee80211_tx_control *control) | |
2038 | { | |
2039 | struct ieee80211_local *local = hw_to_local(hw); | |
2040 | struct sk_buff *skb; | |
2041 | struct net_device *bdev; | |
2042 | struct ieee80211_sub_if_data *sdata = NULL; | |
2043 | struct ieee80211_if_ap *ap = NULL; | |
2044 | struct ieee80211_rate *rate; | |
2045 | struct rate_control_extra extra; | |
2046 | u8 *b_head, *b_tail; | |
2047 | int bh_len, bt_len; | |
2048 | ||
2049 | bdev = dev_get_by_index(if_id); | |
2050 | if (bdev) { | |
2051 | sdata = IEEE80211_DEV_TO_SUB_IF(bdev); | |
2052 | ap = &sdata->u.ap; | |
2053 | dev_put(bdev); | |
2054 | } | |
2055 | ||
2056 | if (!ap || sdata->type != IEEE80211_IF_TYPE_AP || | |
2057 | !ap->beacon_head) { | |
2058 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
2059 | if (net_ratelimit()) | |
2060 | printk(KERN_DEBUG "no beacon data avail for idx=%d " | |
2061 | "(%s)\n", if_id, bdev ? bdev->name : "N/A"); | |
2062 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ | |
2063 | return NULL; | |
2064 | } | |
2065 | ||
2066 | /* Assume we are generating the normal beacon locally */ | |
2067 | b_head = ap->beacon_head; | |
2068 | b_tail = ap->beacon_tail; | |
2069 | bh_len = ap->beacon_head_len; | |
2070 | bt_len = ap->beacon_tail_len; | |
2071 | ||
b306f453 | 2072 | skb = dev_alloc_skb(local->tx_headroom + |
f0706e82 JB |
2073 | bh_len + bt_len + 256 /* maximum TIM len */); |
2074 | if (!skb) | |
2075 | return NULL; | |
2076 | ||
b306f453 | 2077 | skb_reserve(skb, local->tx_headroom); |
f0706e82 JB |
2078 | memcpy(skb_put(skb, bh_len), b_head, bh_len); |
2079 | ||
2080 | ieee80211_include_sequence(sdata, (struct ieee80211_hdr *)skb->data); | |
2081 | ||
2082 | ieee80211_beacon_add_tim(local, ap, skb); | |
2083 | ||
2084 | if (b_tail) { | |
2085 | memcpy(skb_put(skb, bt_len), b_tail, bt_len); | |
2086 | } | |
2087 | ||
2088 | if (control) { | |
2089 | memset(&extra, 0, sizeof(extra)); | |
2090 | extra.mode = local->oper_hw_mode; | |
2091 | ||
2092 | rate = rate_control_get_rate(local, local->mdev, skb, &extra); | |
2093 | if (!rate) { | |
2094 | if (net_ratelimit()) { | |
2095 | printk(KERN_DEBUG "%s: ieee80211_beacon_get: no rate " | |
2096 | "found\n", local->mdev->name); | |
2097 | } | |
2098 | dev_kfree_skb(skb); | |
2099 | return NULL; | |
2100 | } | |
2101 | ||
2102 | control->tx_rate = (local->short_preamble && | |
2103 | (rate->flags & IEEE80211_RATE_PREAMBLE2)) ? | |
2104 | rate->val2 : rate->val; | |
2105 | control->antenna_sel_tx = local->hw.conf.antenna_sel_tx; | |
2106 | control->power_level = local->hw.conf.power_level; | |
2107 | control->flags |= IEEE80211_TXCTL_NO_ACK; | |
2108 | control->retry_limit = 1; | |
2109 | control->flags |= IEEE80211_TXCTL_CLEAR_DST_MASK; | |
2110 | } | |
2111 | ||
2112 | ap->num_beacons++; | |
2113 | return skb; | |
2114 | } | |
2115 | EXPORT_SYMBOL(ieee80211_beacon_get); | |
2116 | ||
2117 | __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, | |
2118 | size_t frame_len, | |
2119 | const struct ieee80211_tx_control *frame_txctl) | |
2120 | { | |
2121 | struct ieee80211_local *local = hw_to_local(hw); | |
2122 | struct ieee80211_rate *rate; | |
2123 | int short_preamble = local->short_preamble; | |
2124 | int erp; | |
2125 | u16 dur; | |
2126 | ||
2127 | rate = frame_txctl->rts_rate; | |
2128 | erp = !!(rate->flags & IEEE80211_RATE_ERP); | |
2129 | ||
2130 | /* CTS duration */ | |
2131 | dur = ieee80211_frame_duration(local, 10, rate->rate, | |
2132 | erp, short_preamble); | |
2133 | /* Data frame duration */ | |
2134 | dur += ieee80211_frame_duration(local, frame_len, rate->rate, | |
2135 | erp, short_preamble); | |
2136 | /* ACK duration */ | |
2137 | dur += ieee80211_frame_duration(local, 10, rate->rate, | |
2138 | erp, short_preamble); | |
2139 | ||
2140 | return cpu_to_le16(dur); | |
2141 | } | |
2142 | EXPORT_SYMBOL(ieee80211_rts_duration); | |
2143 | ||
2144 | ||
2145 | __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, | |
2146 | size_t frame_len, | |
2147 | const struct ieee80211_tx_control *frame_txctl) | |
2148 | { | |
2149 | struct ieee80211_local *local = hw_to_local(hw); | |
2150 | struct ieee80211_rate *rate; | |
2151 | int short_preamble = local->short_preamble; | |
2152 | int erp; | |
2153 | u16 dur; | |
2154 | ||
2155 | rate = frame_txctl->rts_rate; | |
2156 | erp = !!(rate->flags & IEEE80211_RATE_ERP); | |
2157 | ||
2158 | /* Data frame duration */ | |
2159 | dur = ieee80211_frame_duration(local, frame_len, rate->rate, | |
2160 | erp, short_preamble); | |
2161 | if (!(frame_txctl->flags & IEEE80211_TXCTL_NO_ACK)) { | |
2162 | /* ACK duration */ | |
2163 | dur += ieee80211_frame_duration(local, 10, rate->rate, | |
2164 | erp, short_preamble); | |
2165 | } | |
2166 | ||
2167 | return cpu_to_le16(dur); | |
2168 | } | |
2169 | EXPORT_SYMBOL(ieee80211_ctstoself_duration); | |
2170 | ||
2171 | void ieee80211_rts_get(struct ieee80211_hw *hw, | |
2172 | const void *frame, size_t frame_len, | |
2173 | const struct ieee80211_tx_control *frame_txctl, | |
2174 | struct ieee80211_rts *rts) | |
2175 | { | |
2176 | const struct ieee80211_hdr *hdr = frame; | |
2177 | u16 fctl; | |
2178 | ||
2179 | fctl = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS; | |
2180 | rts->frame_control = cpu_to_le16(fctl); | |
2181 | rts->duration = ieee80211_rts_duration(hw, frame_len, frame_txctl); | |
2182 | memcpy(rts->ra, hdr->addr1, sizeof(rts->ra)); | |
2183 | memcpy(rts->ta, hdr->addr2, sizeof(rts->ta)); | |
2184 | } | |
2185 | EXPORT_SYMBOL(ieee80211_rts_get); | |
2186 | ||
2187 | void ieee80211_ctstoself_get(struct ieee80211_hw *hw, | |
2188 | const void *frame, size_t frame_len, | |
2189 | const struct ieee80211_tx_control *frame_txctl, | |
2190 | struct ieee80211_cts *cts) | |
2191 | { | |
2192 | const struct ieee80211_hdr *hdr = frame; | |
2193 | u16 fctl; | |
2194 | ||
2195 | fctl = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS; | |
2196 | cts->frame_control = cpu_to_le16(fctl); | |
2197 | cts->duration = ieee80211_ctstoself_duration(hw, frame_len, frame_txctl); | |
2198 | memcpy(cts->ra, hdr->addr1, sizeof(cts->ra)); | |
2199 | } | |
2200 | EXPORT_SYMBOL(ieee80211_ctstoself_get); | |
2201 | ||
2202 | struct sk_buff * | |
2203 | ieee80211_get_buffered_bc(struct ieee80211_hw *hw, int if_id, | |
2204 | struct ieee80211_tx_control *control) | |
2205 | { | |
2206 | struct ieee80211_local *local = hw_to_local(hw); | |
2207 | struct sk_buff *skb; | |
2208 | struct sta_info *sta; | |
2209 | ieee80211_tx_handler *handler; | |
2210 | struct ieee80211_txrx_data tx; | |
2211 | ieee80211_txrx_result res = TXRX_DROP; | |
2212 | struct net_device *bdev; | |
2213 | struct ieee80211_sub_if_data *sdata; | |
2214 | struct ieee80211_if_ap *bss = NULL; | |
2215 | ||
2216 | bdev = dev_get_by_index(if_id); | |
2217 | if (bdev) { | |
2218 | sdata = IEEE80211_DEV_TO_SUB_IF(bdev); | |
2219 | bss = &sdata->u.ap; | |
2220 | dev_put(bdev); | |
2221 | } | |
2222 | if (!bss || sdata->type != IEEE80211_IF_TYPE_AP || !bss->beacon_head) | |
2223 | return NULL; | |
2224 | ||
2225 | if (bss->dtim_count != 0) | |
2226 | return NULL; /* send buffered bc/mc only after DTIM beacon */ | |
2227 | memset(control, 0, sizeof(*control)); | |
2228 | while (1) { | |
2229 | skb = skb_dequeue(&bss->ps_bc_buf); | |
2230 | if (!skb) | |
2231 | return NULL; | |
2232 | local->total_ps_buffered--; | |
2233 | ||
2234 | if (!skb_queue_empty(&bss->ps_bc_buf) && skb->len >= 2) { | |
2235 | struct ieee80211_hdr *hdr = | |
2236 | (struct ieee80211_hdr *) skb->data; | |
2237 | /* more buffered multicast/broadcast frames ==> set | |
2238 | * MoreData flag in IEEE 802.11 header to inform PS | |
2239 | * STAs */ | |
2240 | hdr->frame_control |= | |
2241 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); | |
2242 | } | |
2243 | ||
2244 | if (ieee80211_tx_prepare(&tx, skb, local->mdev, control) == 0) | |
2245 | break; | |
2246 | dev_kfree_skb_any(skb); | |
2247 | } | |
2248 | sta = tx.sta; | |
2249 | tx.u.tx.ps_buffered = 1; | |
2250 | ||
2251 | for (handler = local->tx_handlers; *handler != NULL; handler++) { | |
2252 | res = (*handler)(&tx); | |
2253 | if (res == TXRX_DROP || res == TXRX_QUEUED) | |
2254 | break; | |
2255 | } | |
2256 | dev_put(tx.dev); | |
2257 | skb = tx.skb; /* handlers are allowed to change skb */ | |
2258 | ||
2259 | if (res == TXRX_DROP) { | |
2260 | I802_DEBUG_INC(local->tx_handlers_drop); | |
2261 | dev_kfree_skb(skb); | |
2262 | skb = NULL; | |
2263 | } else if (res == TXRX_QUEUED) { | |
2264 | I802_DEBUG_INC(local->tx_handlers_queued); | |
2265 | skb = NULL; | |
2266 | } | |
2267 | ||
2268 | if (sta) | |
2269 | sta_info_put(sta); | |
2270 | ||
2271 | return skb; | |
2272 | } | |
2273 | EXPORT_SYMBOL(ieee80211_get_buffered_bc); | |
2274 | ||
2275 | static int __ieee80211_if_config(struct net_device *dev, | |
2276 | struct sk_buff *beacon, | |
2277 | struct ieee80211_tx_control *control) | |
2278 | { | |
2279 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2280 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2281 | struct ieee80211_if_conf conf; | |
2282 | static u8 scan_bssid[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; | |
2283 | ||
2284 | if (!local->ops->config_interface || !netif_running(dev)) | |
2285 | return 0; | |
2286 | ||
2287 | memset(&conf, 0, sizeof(conf)); | |
2288 | conf.type = sdata->type; | |
2289 | if (sdata->type == IEEE80211_IF_TYPE_STA || | |
2290 | sdata->type == IEEE80211_IF_TYPE_IBSS) { | |
2291 | if (local->sta_scanning && | |
2292 | local->scan_dev == dev) | |
2293 | conf.bssid = scan_bssid; | |
2294 | else | |
2295 | conf.bssid = sdata->u.sta.bssid; | |
2296 | conf.ssid = sdata->u.sta.ssid; | |
2297 | conf.ssid_len = sdata->u.sta.ssid_len; | |
2298 | conf.generic_elem = sdata->u.sta.extra_ie; | |
2299 | conf.generic_elem_len = sdata->u.sta.extra_ie_len; | |
2300 | } else if (sdata->type == IEEE80211_IF_TYPE_AP) { | |
2301 | conf.ssid = sdata->u.ap.ssid; | |
2302 | conf.ssid_len = sdata->u.ap.ssid_len; | |
2303 | conf.generic_elem = sdata->u.ap.generic_elem; | |
2304 | conf.generic_elem_len = sdata->u.ap.generic_elem_len; | |
2305 | conf.beacon = beacon; | |
2306 | conf.beacon_control = control; | |
2307 | } | |
2308 | return local->ops->config_interface(local_to_hw(local), | |
2309 | dev->ifindex, &conf); | |
2310 | } | |
2311 | ||
2312 | int ieee80211_if_config(struct net_device *dev) | |
2313 | { | |
2314 | return __ieee80211_if_config(dev, NULL, NULL); | |
2315 | } | |
2316 | ||
2317 | int ieee80211_if_config_beacon(struct net_device *dev) | |
2318 | { | |
2319 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2320 | struct ieee80211_tx_control control; | |
2321 | struct sk_buff *skb; | |
2322 | ||
2323 | if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE)) | |
2324 | return 0; | |
2325 | skb = ieee80211_beacon_get(local_to_hw(local), dev->ifindex, &control); | |
2326 | if (!skb) | |
2327 | return -ENOMEM; | |
2328 | return __ieee80211_if_config(dev, skb, &control); | |
2329 | } | |
2330 | ||
2331 | int ieee80211_hw_config(struct ieee80211_local *local) | |
2332 | { | |
2333 | struct ieee80211_hw_mode *mode; | |
2334 | struct ieee80211_channel *chan; | |
2335 | int ret = 0; | |
2336 | ||
2337 | if (local->sta_scanning) { | |
2338 | chan = local->scan_channel; | |
2339 | mode = local->scan_hw_mode; | |
2340 | } else { | |
2341 | chan = local->oper_channel; | |
2342 | mode = local->oper_hw_mode; | |
2343 | } | |
2344 | ||
2345 | local->hw.conf.channel = chan->chan; | |
2346 | local->hw.conf.channel_val = chan->val; | |
2347 | local->hw.conf.power_level = chan->power_level; | |
2348 | local->hw.conf.freq = chan->freq; | |
2349 | local->hw.conf.phymode = mode->mode; | |
2350 | local->hw.conf.antenna_max = chan->antenna_max; | |
2351 | local->hw.conf.chan = chan; | |
2352 | local->hw.conf.mode = mode; | |
2353 | ||
2354 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
2355 | printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d " | |
2356 | "phymode=%d\n", local->hw.conf.channel, local->hw.conf.freq, | |
2357 | local->hw.conf.phymode); | |
2358 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ | |
2359 | ||
2360 | if (local->ops->config) | |
2361 | ret = local->ops->config(local_to_hw(local), &local->hw.conf); | |
2362 | ||
2363 | return ret; | |
2364 | } | |
2365 | ||
2366 | ||
2367 | static int ieee80211_change_mtu(struct net_device *dev, int new_mtu) | |
2368 | { | |
2369 | /* FIX: what would be proper limits for MTU? | |
2370 | * This interface uses 802.3 frames. */ | |
2371 | if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6) { | |
2372 | printk(KERN_WARNING "%s: invalid MTU %d\n", | |
2373 | dev->name, new_mtu); | |
2374 | return -EINVAL; | |
2375 | } | |
2376 | ||
2377 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
2378 | printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu); | |
2379 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ | |
2380 | dev->mtu = new_mtu; | |
2381 | return 0; | |
2382 | } | |
2383 | ||
2384 | ||
2385 | static int ieee80211_change_mtu_apdev(struct net_device *dev, int new_mtu) | |
2386 | { | |
2387 | /* FIX: what would be proper limits for MTU? | |
2388 | * This interface uses 802.11 frames. */ | |
2389 | if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN) { | |
2390 | printk(KERN_WARNING "%s: invalid MTU %d\n", | |
2391 | dev->name, new_mtu); | |
2392 | return -EINVAL; | |
2393 | } | |
2394 | ||
2395 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG | |
2396 | printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu); | |
2397 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ | |
2398 | dev->mtu = new_mtu; | |
2399 | return 0; | |
2400 | } | |
2401 | ||
2402 | enum netif_tx_lock_class { | |
2403 | TX_LOCK_NORMAL, | |
2404 | TX_LOCK_MASTER, | |
2405 | }; | |
2406 | ||
2407 | static inline void netif_tx_lock_nested(struct net_device *dev, int subclass) | |
2408 | { | |
2409 | spin_lock_nested(&dev->_xmit_lock, subclass); | |
2410 | dev->xmit_lock_owner = smp_processor_id(); | |
2411 | } | |
2412 | ||
2413 | static void ieee80211_set_multicast_list(struct net_device *dev) | |
2414 | { | |
2415 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2416 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2417 | unsigned short flags; | |
2418 | ||
2419 | netif_tx_lock_nested(local->mdev, TX_LOCK_MASTER); | |
2420 | if (((dev->flags & IFF_ALLMULTI) != 0) ^ (sdata->allmulti != 0)) { | |
2421 | if (sdata->allmulti) { | |
2422 | sdata->allmulti = 0; | |
2423 | local->iff_allmultis--; | |
2424 | } else { | |
2425 | sdata->allmulti = 1; | |
2426 | local->iff_allmultis++; | |
2427 | } | |
2428 | } | |
2429 | if (((dev->flags & IFF_PROMISC) != 0) ^ (sdata->promisc != 0)) { | |
2430 | if (sdata->promisc) { | |
2431 | sdata->promisc = 0; | |
2432 | local->iff_promiscs--; | |
2433 | } else { | |
2434 | sdata->promisc = 1; | |
2435 | local->iff_promiscs++; | |
2436 | } | |
2437 | } | |
2438 | if (dev->mc_count != sdata->mc_count) { | |
2439 | local->mc_count = local->mc_count - sdata->mc_count + | |
2440 | dev->mc_count; | |
2441 | sdata->mc_count = dev->mc_count; | |
2442 | } | |
2443 | if (local->ops->set_multicast_list) { | |
2444 | flags = local->mdev->flags; | |
2445 | if (local->iff_allmultis) | |
2446 | flags |= IFF_ALLMULTI; | |
2447 | if (local->iff_promiscs) | |
2448 | flags |= IFF_PROMISC; | |
2449 | read_lock(&local->sub_if_lock); | |
2450 | local->ops->set_multicast_list(local_to_hw(local), flags, | |
2451 | local->mc_count); | |
2452 | read_unlock(&local->sub_if_lock); | |
2453 | } | |
2454 | netif_tx_unlock(local->mdev); | |
2455 | } | |
2456 | ||
2457 | struct dev_mc_list *ieee80211_get_mc_list_item(struct ieee80211_hw *hw, | |
2458 | struct dev_mc_list *prev, | |
2459 | void **ptr) | |
2460 | { | |
2461 | struct ieee80211_local *local = hw_to_local(hw); | |
2462 | struct ieee80211_sub_if_data *sdata = *ptr; | |
2463 | struct dev_mc_list *mc; | |
2464 | ||
2465 | if (!prev) { | |
2466 | WARN_ON(sdata); | |
2467 | sdata = NULL; | |
2468 | } | |
2469 | if (!prev || !prev->next) { | |
2470 | if (sdata) | |
2471 | sdata = list_entry(sdata->list.next, | |
2472 | struct ieee80211_sub_if_data, list); | |
2473 | else | |
2474 | sdata = list_entry(local->sub_if_list.next, | |
2475 | struct ieee80211_sub_if_data, list); | |
2476 | if (&sdata->list != &local->sub_if_list) | |
2477 | mc = sdata->dev->mc_list; | |
2478 | else | |
2479 | mc = NULL; | |
2480 | } else | |
2481 | mc = prev->next; | |
2482 | ||
2483 | *ptr = sdata; | |
2484 | return mc; | |
2485 | } | |
2486 | EXPORT_SYMBOL(ieee80211_get_mc_list_item); | |
2487 | ||
2488 | static struct net_device_stats *ieee80211_get_stats(struct net_device *dev) | |
2489 | { | |
2490 | struct ieee80211_sub_if_data *sdata; | |
2491 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2492 | return &(sdata->stats); | |
2493 | } | |
2494 | ||
2495 | static void ieee80211_if_shutdown(struct net_device *dev) | |
2496 | { | |
2497 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2498 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2499 | ||
2500 | ASSERT_RTNL(); | |
2501 | switch (sdata->type) { | |
2502 | case IEEE80211_IF_TYPE_STA: | |
2503 | case IEEE80211_IF_TYPE_IBSS: | |
2504 | sdata->u.sta.state = IEEE80211_DISABLED; | |
2505 | del_timer_sync(&sdata->u.sta.timer); | |
2506 | skb_queue_purge(&sdata->u.sta.skb_queue); | |
2507 | if (!local->ops->hw_scan && | |
2508 | local->scan_dev == sdata->dev) { | |
2509 | local->sta_scanning = 0; | |
2510 | cancel_delayed_work(&local->scan_work); | |
2511 | } | |
2512 | flush_workqueue(local->hw.workqueue); | |
2513 | break; | |
2514 | } | |
2515 | } | |
2516 | ||
2517 | static inline int identical_mac_addr_allowed(int type1, int type2) | |
2518 | { | |
2519 | return (type1 == IEEE80211_IF_TYPE_MNTR || | |
2520 | type2 == IEEE80211_IF_TYPE_MNTR || | |
2521 | (type1 == IEEE80211_IF_TYPE_AP && | |
2522 | type2 == IEEE80211_IF_TYPE_WDS) || | |
2523 | (type1 == IEEE80211_IF_TYPE_WDS && | |
2524 | (type2 == IEEE80211_IF_TYPE_WDS || | |
2525 | type2 == IEEE80211_IF_TYPE_AP)) || | |
2526 | (type1 == IEEE80211_IF_TYPE_AP && | |
2527 | type2 == IEEE80211_IF_TYPE_VLAN) || | |
2528 | (type1 == IEEE80211_IF_TYPE_VLAN && | |
2529 | (type2 == IEEE80211_IF_TYPE_AP || | |
2530 | type2 == IEEE80211_IF_TYPE_VLAN))); | |
2531 | } | |
2532 | ||
2533 | static int ieee80211_master_open(struct net_device *dev) | |
2534 | { | |
2535 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2536 | struct ieee80211_sub_if_data *sdata; | |
2537 | int res = -EOPNOTSUPP; | |
2538 | ||
2539 | read_lock(&local->sub_if_lock); | |
2540 | list_for_each_entry(sdata, &local->sub_if_list, list) { | |
2541 | if (sdata->dev != dev && netif_running(sdata->dev)) { | |
2542 | res = 0; | |
2543 | break; | |
2544 | } | |
2545 | } | |
2546 | read_unlock(&local->sub_if_lock); | |
2547 | return res; | |
2548 | } | |
2549 | ||
2550 | static int ieee80211_master_stop(struct net_device *dev) | |
2551 | { | |
2552 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2553 | struct ieee80211_sub_if_data *sdata; | |
2554 | ||
2555 | read_lock(&local->sub_if_lock); | |
2556 | list_for_each_entry(sdata, &local->sub_if_list, list) | |
2557 | if (sdata->dev != dev && netif_running(sdata->dev)) | |
2558 | dev_close(sdata->dev); | |
2559 | read_unlock(&local->sub_if_lock); | |
2560 | ||
2561 | return 0; | |
2562 | } | |
2563 | ||
2564 | static int ieee80211_mgmt_open(struct net_device *dev) | |
2565 | { | |
2566 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2567 | ||
2568 | if (!netif_running(local->mdev)) | |
2569 | return -EOPNOTSUPP; | |
2570 | return 0; | |
2571 | } | |
2572 | ||
2573 | static int ieee80211_mgmt_stop(struct net_device *dev) | |
2574 | { | |
2575 | return 0; | |
2576 | } | |
2577 | ||
2578 | /* Check if running monitor interfaces should go to a "soft monitor" mode | |
2579 | * and switch them if necessary. */ | |
2580 | static inline void ieee80211_start_soft_monitor(struct ieee80211_local *local) | |
2581 | { | |
2582 | struct ieee80211_if_init_conf conf; | |
2583 | ||
2584 | if (local->open_count && local->open_count == local->monitors && | |
2585 | !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER) && | |
2586 | local->ops->remove_interface) { | |
2587 | conf.if_id = -1; | |
2588 | conf.type = IEEE80211_IF_TYPE_MNTR; | |
2589 | conf.mac_addr = NULL; | |
2590 | local->ops->remove_interface(local_to_hw(local), &conf); | |
2591 | } | |
2592 | } | |
2593 | ||
2594 | /* Check if running monitor interfaces should go to a "hard monitor" mode | |
2595 | * and switch them if necessary. */ | |
2596 | static void ieee80211_start_hard_monitor(struct ieee80211_local *local) | |
2597 | { | |
2598 | struct ieee80211_if_init_conf conf; | |
2599 | ||
2600 | if (local->open_count && local->open_count == local->monitors && | |
4480f15c | 2601 | !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) { |
f0706e82 JB |
2602 | conf.if_id = -1; |
2603 | conf.type = IEEE80211_IF_TYPE_MNTR; | |
2604 | conf.mac_addr = NULL; | |
2605 | local->ops->add_interface(local_to_hw(local), &conf); | |
2606 | } | |
2607 | } | |
2608 | ||
2609 | static int ieee80211_open(struct net_device *dev) | |
2610 | { | |
2611 | struct ieee80211_sub_if_data *sdata, *nsdata; | |
2612 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2613 | struct ieee80211_if_init_conf conf; | |
2614 | int res; | |
2615 | ||
2616 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2617 | read_lock(&local->sub_if_lock); | |
2618 | list_for_each_entry(nsdata, &local->sub_if_list, list) { | |
2619 | struct net_device *ndev = nsdata->dev; | |
2620 | ||
2621 | if (ndev != dev && ndev != local->mdev && netif_running(ndev) && | |
2622 | compare_ether_addr(dev->dev_addr, ndev->dev_addr) == 0 && | |
2623 | !identical_mac_addr_allowed(sdata->type, nsdata->type)) { | |
2624 | read_unlock(&local->sub_if_lock); | |
2625 | return -ENOTUNIQ; | |
2626 | } | |
2627 | } | |
2628 | read_unlock(&local->sub_if_lock); | |
2629 | ||
2630 | if (sdata->type == IEEE80211_IF_TYPE_WDS && | |
2631 | is_zero_ether_addr(sdata->u.wds.remote_addr)) | |
2632 | return -ENOLINK; | |
2633 | ||
2634 | if (sdata->type == IEEE80211_IF_TYPE_MNTR && local->open_count && | |
2635 | !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) { | |
2636 | /* run the interface in a "soft monitor" mode */ | |
2637 | local->monitors++; | |
2638 | local->open_count++; | |
2639 | local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP; | |
2640 | return 0; | |
2641 | } | |
2642 | ieee80211_start_soft_monitor(local); | |
2643 | ||
4480f15c JB |
2644 | conf.if_id = dev->ifindex; |
2645 | conf.type = sdata->type; | |
2646 | conf.mac_addr = dev->dev_addr; | |
2647 | res = local->ops->add_interface(local_to_hw(local), &conf); | |
2648 | if (res) { | |
2649 | if (sdata->type == IEEE80211_IF_TYPE_MNTR) | |
2650 | ieee80211_start_hard_monitor(local); | |
2651 | return res; | |
f0706e82 JB |
2652 | } |
2653 | ||
2654 | if (local->open_count == 0) { | |
2655 | res = 0; | |
2656 | tasklet_enable(&local->tx_pending_tasklet); | |
2657 | tasklet_enable(&local->tasklet); | |
2658 | if (local->ops->open) | |
2659 | res = local->ops->open(local_to_hw(local)); | |
2660 | if (res == 0) { | |
2661 | res = dev_open(local->mdev); | |
2662 | if (res) { | |
2663 | if (local->ops->stop) | |
2664 | local->ops->stop(local_to_hw(local)); | |
2665 | } else { | |
2666 | res = ieee80211_hw_config(local); | |
2667 | if (res && local->ops->stop) | |
2668 | local->ops->stop(local_to_hw(local)); | |
2669 | else if (!res && local->apdev) | |
2670 | dev_open(local->apdev); | |
2671 | } | |
2672 | } | |
2673 | if (res) { | |
2674 | if (local->ops->remove_interface) | |
2675 | local->ops->remove_interface(local_to_hw(local), | |
2676 | &conf); | |
2677 | return res; | |
2678 | } | |
2679 | } | |
2680 | local->open_count++; | |
2681 | ||
2682 | if (sdata->type == IEEE80211_IF_TYPE_MNTR) { | |
2683 | local->monitors++; | |
2684 | local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP; | |
2685 | } else | |
2686 | ieee80211_if_config(dev); | |
2687 | ||
2688 | if (sdata->type == IEEE80211_IF_TYPE_STA && | |
2689 | !local->user_space_mlme) | |
2690 | netif_carrier_off(dev); | |
52fb24cd MW |
2691 | else |
2692 | netif_carrier_on(dev); | |
f0706e82 JB |
2693 | |
2694 | netif_start_queue(dev); | |
2695 | return 0; | |
2696 | } | |
2697 | ||
2698 | ||
2699 | static int ieee80211_stop(struct net_device *dev) | |
2700 | { | |
2701 | struct ieee80211_sub_if_data *sdata; | |
2702 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
2703 | ||
2704 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
2705 | ||
2706 | if (sdata->type == IEEE80211_IF_TYPE_MNTR && | |
2707 | local->open_count > 1 && | |
2708 | !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) { | |
2709 | /* remove "soft monitor" interface */ | |
2710 | local->open_count--; | |
2711 | local->monitors--; | |
2712 | if (!local->monitors) | |
2713 | local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP; | |
2714 | return 0; | |
2715 | } | |
2716 | ||
2717 | netif_stop_queue(dev); | |
2718 | ieee80211_if_shutdown(dev); | |
2719 | ||
2720 | if (sdata->type == IEEE80211_IF_TYPE_MNTR) { | |
2721 | local->monitors--; | |
2722 | if (!local->monitors) | |
2723 | local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP; | |
2724 | } | |
2725 | ||
2726 | local->open_count--; | |
2727 | if (local->open_count == 0) { | |
2728 | if (netif_running(local->mdev)) | |
2729 | dev_close(local->mdev); | |
2730 | if (local->apdev) | |
2731 | dev_close(local->apdev); | |
2732 | if (local->ops->stop) | |
2733 | local->ops->stop(local_to_hw(local)); | |
2734 | tasklet_disable(&local->tx_pending_tasklet); | |
2735 | tasklet_disable(&local->tasklet); | |
2736 | } | |
2737 | if (local->ops->remove_interface) { | |
2738 | struct ieee80211_if_init_conf conf; | |
2739 | ||
2740 | conf.if_id = dev->ifindex; | |
2741 | conf.type = sdata->type; | |
2742 | conf.mac_addr = dev->dev_addr; | |
2743 | local->ops->remove_interface(local_to_hw(local), &conf); | |
2744 | } | |
2745 | ||
2746 | ieee80211_start_hard_monitor(local); | |
2747 | ||
2748 | return 0; | |
2749 | } | |
2750 | ||
2751 | ||
2752 | static int header_parse_80211(struct sk_buff *skb, unsigned char *haddr) | |
2753 | { | |
2754 | memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */ | |
2755 | return ETH_ALEN; | |
2756 | } | |
2757 | ||
571ecf67 | 2758 | struct ieee80211_rate * |
f0706e82 JB |
2759 | ieee80211_get_rate(struct ieee80211_local *local, int phymode, int hw_rate) |
2760 | { | |
2761 | struct ieee80211_hw_mode *mode; | |
2762 | int r; | |
2763 | ||
2764 | list_for_each_entry(mode, &local->modes_list, list) { | |
2765 | if (mode->mode != phymode) | |
2766 | continue; | |
2767 | for (r = 0; r < mode->num_rates; r++) { | |
2768 | struct ieee80211_rate *rate = &mode->rates[r]; | |
2769 | if (rate->val == hw_rate || | |
2770 | (rate->flags & IEEE80211_RATE_PREAMBLE2 && | |
2771 | rate->val2 == hw_rate)) | |
2772 | return rate; | |
2773 | } | |
2774 | } | |
2775 | ||
2776 | return NULL; | |
2777 | } | |
2778 | ||
2779 | static void | |
2780 | ieee80211_fill_frame_info(struct ieee80211_local *local, | |
2781 | struct ieee80211_frame_info *fi, | |
2782 | struct ieee80211_rx_status *status) | |
2783 | { | |
2784 | if (status) { | |
2785 | struct timespec ts; | |
2786 | struct ieee80211_rate *rate; | |
2787 | ||
2788 | jiffies_to_timespec(jiffies, &ts); | |
2789 | fi->hosttime = cpu_to_be64((u64) ts.tv_sec * 1000000 + | |
2790 | ts.tv_nsec / 1000); | |
2791 | fi->mactime = cpu_to_be64(status->mactime); | |
2792 | switch (status->phymode) { | |
2793 | case MODE_IEEE80211A: | |
2794 | fi->phytype = htonl(ieee80211_phytype_ofdm_dot11_a); | |
2795 | break; | |
2796 | case MODE_IEEE80211B: | |
2797 | fi->phytype = htonl(ieee80211_phytype_dsss_dot11_b); | |
2798 | break; | |
2799 | case MODE_IEEE80211G: | |
2800 | fi->phytype = htonl(ieee80211_phytype_pbcc_dot11_g); | |
2801 | break; | |
2802 | case MODE_ATHEROS_TURBO: | |
2803 | fi->phytype = | |
2804 | htonl(ieee80211_phytype_dsss_dot11_turbo); | |
2805 | break; | |
2806 | default: | |
2807 | fi->phytype = htonl(0xAAAAAAAA); | |
2808 | break; | |
2809 | } | |
2810 | fi->channel = htonl(status->channel); | |
2811 | rate = ieee80211_get_rate(local, status->phymode, | |
2812 | status->rate); | |
2813 | if (rate) { | |
2814 | fi->datarate = htonl(rate->rate); | |
2815 | if (rate->flags & IEEE80211_RATE_PREAMBLE2) { | |
2816 | if (status->rate == rate->val) | |
2817 | fi->preamble = htonl(2); /* long */ | |
2818 | else if (status->rate == rate->val2) | |
2819 | fi->preamble = htonl(1); /* short */ | |
2820 | } else | |
2821 | fi->preamble = htonl(0); | |
2822 | } else { | |
2823 | fi->datarate = htonl(0); | |
2824 | fi->preamble = htonl(0); | |
2825 | } | |
2826 | ||
2827 | fi->antenna = htonl(status->antenna); | |
2828 | fi->priority = htonl(0xffffffff); /* no clue */ | |
2829 | fi->ssi_type = htonl(ieee80211_ssi_raw); | |
2830 | fi->ssi_signal = htonl(status->ssi); | |
2831 | fi->ssi_noise = 0x00000000; | |
2832 | fi->encoding = 0; | |
2833 | } else { | |
2834 | /* clear everything because we really don't know. | |
2835 | * the msg_type field isn't present on monitor frames | |
2836 | * so we don't know whether it will be present or not, | |
2837 | * but it's ok to not clear it since it'll be assigned | |
2838 | * anyway */ | |
2839 | memset(fi, 0, sizeof(*fi) - sizeof(fi->msg_type)); | |
2840 | ||
2841 | fi->ssi_type = htonl(ieee80211_ssi_none); | |
2842 | } | |
2843 | fi->version = htonl(IEEE80211_FI_VERSION); | |
2844 | fi->length = cpu_to_be32(sizeof(*fi) - sizeof(fi->msg_type)); | |
2845 | } | |
2846 | ||
2847 | /* this routine is actually not just for this, but also | |
2848 | * for pushing fake 'management' frames into userspace. | |
2849 | * it shall be replaced by a netlink-based system. */ | |
2850 | void | |
2851 | ieee80211_rx_mgmt(struct ieee80211_local *local, struct sk_buff *skb, | |
2852 | struct ieee80211_rx_status *status, u32 msg_type) | |
2853 | { | |
2854 | struct ieee80211_frame_info *fi; | |
2855 | const size_t hlen = sizeof(struct ieee80211_frame_info); | |
2856 | struct ieee80211_sub_if_data *sdata; | |
2857 | ||
2858 | skb->dev = local->apdev; | |
2859 | ||
2860 | sdata = IEEE80211_DEV_TO_SUB_IF(local->apdev); | |
2861 | ||
2862 | if (skb_headroom(skb) < hlen) { | |
2863 | I802_DEBUG_INC(local->rx_expand_skb_head); | |
2864 | if (pskb_expand_head(skb, hlen, 0, GFP_ATOMIC)) { | |
2865 | dev_kfree_skb(skb); | |
2866 | return; | |
2867 | } | |
2868 | } | |
2869 | ||
2870 | fi = (struct ieee80211_frame_info *) skb_push(skb, hlen); | |
2871 | ||
2872 | ieee80211_fill_frame_info(local, fi, status); | |
2873 | fi->msg_type = htonl(msg_type); | |
2874 | ||
2875 | sdata->stats.rx_packets++; | |
2876 | sdata->stats.rx_bytes += skb->len; | |
2877 | ||
2878 | skb_set_mac_header(skb, 0); | |
2879 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
2880 | skb->pkt_type = PACKET_OTHERHOST; | |
2881 | skb->protocol = htons(ETH_P_802_2); | |
2882 | memset(skb->cb, 0, sizeof(skb->cb)); | |
2883 | netif_rx(skb); | |
2884 | } | |
2885 | ||
f0706e82 JB |
2886 | int ieee80211_radar_status(struct ieee80211_hw *hw, int channel, |
2887 | int radar, int radar_type) | |
2888 | { | |
2889 | struct sk_buff *skb; | |
2890 | struct ieee80211_radar_info *msg; | |
2891 | struct ieee80211_local *local = hw_to_local(hw); | |
2892 | ||
2893 | if (!local->apdev) | |
2894 | return 0; | |
2895 | ||
2896 | skb = dev_alloc_skb(sizeof(struct ieee80211_frame_info) + | |
2897 | sizeof(struct ieee80211_radar_info)); | |
2898 | ||
2899 | if (!skb) | |
2900 | return -ENOMEM; | |
2901 | skb_reserve(skb, sizeof(struct ieee80211_frame_info)); | |
2902 | ||
2903 | msg = (struct ieee80211_radar_info *) | |
2904 | skb_put(skb, sizeof(struct ieee80211_radar_info)); | |
2905 | msg->channel = channel; | |
2906 | msg->radar = radar; | |
2907 | msg->radar_type = radar_type; | |
2908 | ||
2909 | ieee80211_rx_mgmt(local, skb, NULL, ieee80211_msg_radar); | |
2910 | return 0; | |
2911 | } | |
2912 | EXPORT_SYMBOL(ieee80211_radar_status); | |
2913 | ||
f0706e82 | 2914 | |
f0706e82 JB |
2915 | static ieee80211_txrx_result |
2916 | ieee80211_tx_h_load_stats(struct ieee80211_txrx_data *tx) | |
2917 | { | |
2918 | struct ieee80211_local *local = tx->local; | |
2919 | struct ieee80211_hw_mode *mode = tx->u.tx.mode; | |
2920 | struct sk_buff *skb = tx->skb; | |
2921 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
2922 | u32 load = 0, hdrtime; | |
2923 | ||
2924 | /* TODO: this could be part of tx_status handling, so that the number | |
2925 | * of retries would be known; TX rate should in that case be stored | |
2926 | * somewhere with the packet */ | |
2927 | ||
2928 | /* Estimate total channel use caused by this frame */ | |
2929 | ||
2930 | /* 1 bit at 1 Mbit/s takes 1 usec; in channel_use values, | |
2931 | * 1 usec = 1/8 * (1080 / 10) = 13.5 */ | |
2932 | ||
2933 | if (mode->mode == MODE_IEEE80211A || | |
2934 | mode->mode == MODE_ATHEROS_TURBO || | |
2935 | mode->mode == MODE_ATHEROS_TURBOG || | |
2936 | (mode->mode == MODE_IEEE80211G && | |
2937 | tx->u.tx.rate->flags & IEEE80211_RATE_ERP)) | |
2938 | hdrtime = CHAN_UTIL_HDR_SHORT; | |
2939 | else | |
2940 | hdrtime = CHAN_UTIL_HDR_LONG; | |
2941 | ||
2942 | load = hdrtime; | |
2943 | if (!is_multicast_ether_addr(hdr->addr1)) | |
2944 | load += hdrtime; | |
2945 | ||
2946 | if (tx->u.tx.control->flags & IEEE80211_TXCTL_USE_RTS_CTS) | |
2947 | load += 2 * hdrtime; | |
2948 | else if (tx->u.tx.control->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) | |
2949 | load += hdrtime; | |
2950 | ||
2951 | load += skb->len * tx->u.tx.rate->rate_inv; | |
2952 | ||
2953 | if (tx->u.tx.extra_frag) { | |
2954 | int i; | |
2955 | for (i = 0; i < tx->u.tx.num_extra_frag; i++) { | |
2956 | load += 2 * hdrtime; | |
2957 | load += tx->u.tx.extra_frag[i]->len * | |
2958 | tx->u.tx.rate->rate; | |
2959 | } | |
2960 | } | |
2961 | ||
2962 | /* Divide channel_use by 8 to avoid wrapping around the counter */ | |
2963 | load >>= CHAN_UTIL_SHIFT; | |
2964 | local->channel_use_raw += load; | |
2965 | if (tx->sta) | |
2966 | tx->sta->channel_use_raw += load; | |
2967 | tx->sdata->channel_use_raw += load; | |
2968 | ||
2969 | return TXRX_CONTINUE; | |
2970 | } | |
2971 | ||
2972 | ||
f0706e82 JB |
2973 | static void ieee80211_stat_refresh(unsigned long data) |
2974 | { | |
2975 | struct ieee80211_local *local = (struct ieee80211_local *) data; | |
2976 | struct sta_info *sta; | |
2977 | struct ieee80211_sub_if_data *sdata; | |
2978 | ||
2979 | if (!local->stat_time) | |
2980 | return; | |
2981 | ||
2982 | /* go through all stations */ | |
2983 | spin_lock_bh(&local->sta_lock); | |
2984 | list_for_each_entry(sta, &local->sta_list, list) { | |
2985 | sta->channel_use = (sta->channel_use_raw / local->stat_time) / | |
2986 | CHAN_UTIL_PER_10MS; | |
2987 | sta->channel_use_raw = 0; | |
2988 | } | |
2989 | spin_unlock_bh(&local->sta_lock); | |
2990 | ||
2991 | /* go through all subinterfaces */ | |
2992 | read_lock(&local->sub_if_lock); | |
2993 | list_for_each_entry(sdata, &local->sub_if_list, list) { | |
2994 | sdata->channel_use = (sdata->channel_use_raw / | |
2995 | local->stat_time) / CHAN_UTIL_PER_10MS; | |
2996 | sdata->channel_use_raw = 0; | |
2997 | } | |
2998 | read_unlock(&local->sub_if_lock); | |
2999 | ||
3000 | /* hardware interface */ | |
3001 | local->channel_use = (local->channel_use_raw / | |
3002 | local->stat_time) / CHAN_UTIL_PER_10MS; | |
3003 | local->channel_use_raw = 0; | |
3004 | ||
3005 | local->stat_timer.expires = jiffies + HZ * local->stat_time / 100; | |
3006 | add_timer(&local->stat_timer); | |
3007 | } | |
3008 | ||
3009 | ||
f0706e82 JB |
3010 | void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, |
3011 | struct sk_buff *skb, | |
3012 | struct ieee80211_tx_status *status) | |
3013 | { | |
3014 | struct ieee80211_local *local = hw_to_local(hw); | |
3015 | struct ieee80211_tx_status *saved; | |
3016 | int tmp; | |
3017 | ||
3018 | skb->dev = local->mdev; | |
3019 | saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC); | |
3020 | if (unlikely(!saved)) { | |
3021 | if (net_ratelimit()) | |
3022 | printk(KERN_WARNING "%s: Not enough memory, " | |
3023 | "dropping tx status", skb->dev->name); | |
3024 | /* should be dev_kfree_skb_irq, but due to this function being | |
3025 | * named _irqsafe instead of just _irq we can't be sure that | |
3026 | * people won't call it from non-irq contexts */ | |
3027 | dev_kfree_skb_any(skb); | |
3028 | return; | |
3029 | } | |
3030 | memcpy(saved, status, sizeof(struct ieee80211_tx_status)); | |
3031 | /* copy pointer to saved status into skb->cb for use by tasklet */ | |
3032 | memcpy(skb->cb, &saved, sizeof(saved)); | |
3033 | ||
3034 | skb->pkt_type = IEEE80211_TX_STATUS_MSG; | |
3035 | skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ? | |
3036 | &local->skb_queue : &local->skb_queue_unreliable, skb); | |
3037 | tmp = skb_queue_len(&local->skb_queue) + | |
3038 | skb_queue_len(&local->skb_queue_unreliable); | |
3039 | while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT && | |
3040 | (skb = skb_dequeue(&local->skb_queue_unreliable))) { | |
3041 | memcpy(&saved, skb->cb, sizeof(saved)); | |
3042 | kfree(saved); | |
3043 | dev_kfree_skb_irq(skb); | |
3044 | tmp--; | |
3045 | I802_DEBUG_INC(local->tx_status_drop); | |
3046 | } | |
3047 | tasklet_schedule(&local->tasklet); | |
3048 | } | |
3049 | EXPORT_SYMBOL(ieee80211_tx_status_irqsafe); | |
3050 | ||
3051 | static void ieee80211_tasklet_handler(unsigned long data) | |
3052 | { | |
3053 | struct ieee80211_local *local = (struct ieee80211_local *) data; | |
3054 | struct sk_buff *skb; | |
3055 | struct ieee80211_rx_status rx_status; | |
3056 | struct ieee80211_tx_status *tx_status; | |
3057 | ||
3058 | while ((skb = skb_dequeue(&local->skb_queue)) || | |
3059 | (skb = skb_dequeue(&local->skb_queue_unreliable))) { | |
3060 | switch (skb->pkt_type) { | |
3061 | case IEEE80211_RX_MSG: | |
3062 | /* status is in skb->cb */ | |
3063 | memcpy(&rx_status, skb->cb, sizeof(rx_status)); | |
3064 | /* Clear skb->type in order to not confuse kernel | |
3065 | * netstack. */ | |
3066 | skb->pkt_type = 0; | |
3067 | __ieee80211_rx(local_to_hw(local), skb, &rx_status); | |
3068 | break; | |
3069 | case IEEE80211_TX_STATUS_MSG: | |
3070 | /* get pointer to saved status out of skb->cb */ | |
3071 | memcpy(&tx_status, skb->cb, sizeof(tx_status)); | |
3072 | skb->pkt_type = 0; | |
3073 | ieee80211_tx_status(local_to_hw(local), | |
3074 | skb, tx_status); | |
3075 | kfree(tx_status); | |
3076 | break; | |
3077 | default: /* should never get here! */ | |
3078 | printk(KERN_ERR "%s: Unknown message type (%d)\n", | |
3079 | local->mdev->name, skb->pkt_type); | |
3080 | dev_kfree_skb(skb); | |
3081 | break; | |
3082 | } | |
3083 | } | |
3084 | } | |
3085 | ||
3086 | ||
3087 | /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to | |
3088 | * make a prepared TX frame (one that has been given to hw) to look like brand | |
3089 | * new IEEE 802.11 frame that is ready to go through TX processing again. | |
3090 | * Also, tx_packet_data in cb is restored from tx_control. */ | |
3091 | static void ieee80211_remove_tx_extra(struct ieee80211_local *local, | |
3092 | struct ieee80211_key *key, | |
3093 | struct sk_buff *skb, | |
3094 | struct ieee80211_tx_control *control) | |
3095 | { | |
3096 | int hdrlen, iv_len, mic_len; | |
3097 | struct ieee80211_tx_packet_data *pkt_data; | |
3098 | ||
3099 | pkt_data = (struct ieee80211_tx_packet_data *)skb->cb; | |
3100 | pkt_data->ifindex = control->ifindex; | |
3101 | pkt_data->mgmt_iface = (control->type == IEEE80211_IF_TYPE_MGMT); | |
3102 | pkt_data->req_tx_status = !!(control->flags & IEEE80211_TXCTL_REQ_TX_STATUS); | |
3103 | pkt_data->do_not_encrypt = !!(control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT); | |
3104 | pkt_data->requeue = !!(control->flags & IEEE80211_TXCTL_REQUEUE); | |
3105 | pkt_data->queue = control->queue; | |
3106 | ||
3107 | hdrlen = ieee80211_get_hdrlen_from_skb(skb); | |
3108 | ||
3109 | if (!key) | |
3110 | goto no_key; | |
3111 | ||
3112 | switch (key->alg) { | |
3113 | case ALG_WEP: | |
3114 | iv_len = WEP_IV_LEN; | |
3115 | mic_len = WEP_ICV_LEN; | |
3116 | break; | |
3117 | case ALG_TKIP: | |
3118 | iv_len = TKIP_IV_LEN; | |
3119 | mic_len = TKIP_ICV_LEN; | |
3120 | break; | |
3121 | case ALG_CCMP: | |
3122 | iv_len = CCMP_HDR_LEN; | |
3123 | mic_len = CCMP_MIC_LEN; | |
3124 | break; | |
3125 | default: | |
3126 | goto no_key; | |
3127 | } | |
3128 | ||
3129 | if (skb->len >= mic_len && key->force_sw_encrypt) | |
3130 | skb_trim(skb, skb->len - mic_len); | |
3131 | if (skb->len >= iv_len && skb->len > hdrlen) { | |
3132 | memmove(skb->data + iv_len, skb->data, hdrlen); | |
3133 | skb_pull(skb, iv_len); | |
3134 | } | |
3135 | ||
3136 | no_key: | |
3137 | { | |
3138 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
3139 | u16 fc = le16_to_cpu(hdr->frame_control); | |
3140 | if ((fc & 0x8C) == 0x88) /* QoS Control Field */ { | |
3141 | fc &= ~IEEE80211_STYPE_QOS_DATA; | |
3142 | hdr->frame_control = cpu_to_le16(fc); | |
3143 | memmove(skb->data + 2, skb->data, hdrlen - 2); | |
3144 | skb_pull(skb, 2); | |
3145 | } | |
3146 | } | |
3147 | } | |
3148 | ||
3149 | ||
3150 | void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb, | |
3151 | struct ieee80211_tx_status *status) | |
3152 | { | |
3153 | struct sk_buff *skb2; | |
3154 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
3155 | struct ieee80211_local *local = hw_to_local(hw); | |
3156 | u16 frag, type; | |
3157 | u32 msg_type; | |
b306f453 JB |
3158 | struct ieee80211_tx_status_rtap_hdr *rthdr; |
3159 | struct ieee80211_sub_if_data *sdata; | |
3160 | int monitors; | |
f0706e82 JB |
3161 | |
3162 | if (!status) { | |
3163 | printk(KERN_ERR | |
3164 | "%s: ieee80211_tx_status called with NULL status\n", | |
3165 | local->mdev->name); | |
3166 | dev_kfree_skb(skb); | |
3167 | return; | |
3168 | } | |
3169 | ||
3170 | if (status->excessive_retries) { | |
3171 | struct sta_info *sta; | |
3172 | sta = sta_info_get(local, hdr->addr1); | |
3173 | if (sta) { | |
3174 | if (sta->flags & WLAN_STA_PS) { | |
3175 | /* The STA is in power save mode, so assume | |
3176 | * that this TX packet failed because of that. | |
3177 | */ | |
3178 | status->excessive_retries = 0; | |
3179 | status->flags |= IEEE80211_TX_STATUS_TX_FILTERED; | |
3180 | } | |
3181 | sta_info_put(sta); | |
3182 | } | |
3183 | } | |
3184 | ||
3185 | if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) { | |
3186 | struct sta_info *sta; | |
3187 | sta = sta_info_get(local, hdr->addr1); | |
3188 | if (sta) { | |
3189 | sta->tx_filtered_count++; | |
3190 | ||
3191 | /* Clear the TX filter mask for this STA when sending | |
3192 | * the next packet. If the STA went to power save mode, | |
3193 | * this will happen when it is waking up for the next | |
3194 | * time. */ | |
3195 | sta->clear_dst_mask = 1; | |
3196 | ||
3197 | /* TODO: Is the WLAN_STA_PS flag always set here or is | |
3198 | * the race between RX and TX status causing some | |
3199 | * packets to be filtered out before 80211.o gets an | |
3200 | * update for PS status? This seems to be the case, so | |
3201 | * no changes are likely to be needed. */ | |
3202 | if (sta->flags & WLAN_STA_PS && | |
3203 | skb_queue_len(&sta->tx_filtered) < | |
3204 | STA_MAX_TX_BUFFER) { | |
3205 | ieee80211_remove_tx_extra(local, sta->key, | |
3206 | skb, | |
3207 | &status->control); | |
3208 | skb_queue_tail(&sta->tx_filtered, skb); | |
3209 | } else if (!(sta->flags & WLAN_STA_PS) && | |
3210 | !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) { | |
3211 | /* Software retry the packet once */ | |
3212 | status->control.flags |= IEEE80211_TXCTL_REQUEUE; | |
3213 | ieee80211_remove_tx_extra(local, sta->key, | |
3214 | skb, | |
3215 | &status->control); | |
3216 | dev_queue_xmit(skb); | |
3217 | } else { | |
3218 | if (net_ratelimit()) { | |
3219 | printk(KERN_DEBUG "%s: dropped TX " | |
3220 | "filtered frame queue_len=%d " | |
3221 | "PS=%d @%lu\n", | |
3222 | local->mdev->name, | |
3223 | skb_queue_len( | |
3224 | &sta->tx_filtered), | |
3225 | !!(sta->flags & WLAN_STA_PS), | |
3226 | jiffies); | |
3227 | } | |
3228 | dev_kfree_skb(skb); | |
3229 | } | |
3230 | sta_info_put(sta); | |
3231 | return; | |
3232 | } | |
3233 | } else { | |
3234 | /* FIXME: STUPID to call this with both local and local->mdev */ | |
3235 | rate_control_tx_status(local, local->mdev, skb, status); | |
3236 | } | |
3237 | ||
3238 | ieee80211_led_tx(local, 0); | |
3239 | ||
3240 | /* SNMP counters | |
3241 | * Fragments are passed to low-level drivers as separate skbs, so these | |
3242 | * are actually fragments, not frames. Update frame counters only for | |
3243 | * the first fragment of the frame. */ | |
3244 | ||
3245 | frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG; | |
3246 | type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE; | |
3247 | ||
3248 | if (status->flags & IEEE80211_TX_STATUS_ACK) { | |
3249 | if (frag == 0) { | |
3250 | local->dot11TransmittedFrameCount++; | |
3251 | if (is_multicast_ether_addr(hdr->addr1)) | |
3252 | local->dot11MulticastTransmittedFrameCount++; | |
3253 | if (status->retry_count > 0) | |
3254 | local->dot11RetryCount++; | |
3255 | if (status->retry_count > 1) | |
3256 | local->dot11MultipleRetryCount++; | |
3257 | } | |
3258 | ||
3259 | /* This counter shall be incremented for an acknowledged MPDU | |
3260 | * with an individual address in the address 1 field or an MPDU | |
3261 | * with a multicast address in the address 1 field of type Data | |
3262 | * or Management. */ | |
3263 | if (!is_multicast_ether_addr(hdr->addr1) || | |
3264 | type == IEEE80211_FTYPE_DATA || | |
3265 | type == IEEE80211_FTYPE_MGMT) | |
3266 | local->dot11TransmittedFragmentCount++; | |
3267 | } else { | |
3268 | if (frag == 0) | |
3269 | local->dot11FailedCount++; | |
3270 | } | |
3271 | ||
b306f453 JB |
3272 | msg_type = (status->flags & IEEE80211_TX_STATUS_ACK) ? |
3273 | ieee80211_msg_tx_callback_ack : ieee80211_msg_tx_callback_fail; | |
3274 | ||
3275 | /* this was a transmitted frame, but now we want to reuse it */ | |
3276 | skb_orphan(skb); | |
3277 | ||
3278 | if ((status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS) && | |
3279 | local->apdev) { | |
3280 | if (local->monitors) { | |
3281 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
3282 | } else { | |
3283 | skb2 = skb; | |
3284 | skb = NULL; | |
3285 | } | |
3286 | ||
3287 | if (skb2) | |
3288 | /* Send frame to hostapd */ | |
3289 | ieee80211_rx_mgmt(local, skb2, NULL, msg_type); | |
3290 | ||
3291 | if (!skb) | |
3292 | return; | |
3293 | } | |
3294 | ||
3295 | if (!local->monitors) { | |
f0706e82 JB |
3296 | dev_kfree_skb(skb); |
3297 | return; | |
3298 | } | |
3299 | ||
b306f453 | 3300 | /* send frame to monitor interfaces now */ |
f0706e82 | 3301 | |
b306f453 JB |
3302 | if (skb_headroom(skb) < sizeof(*rthdr)) { |
3303 | printk(KERN_ERR "ieee80211_tx_status: headroom too small\n"); | |
f0706e82 JB |
3304 | dev_kfree_skb(skb); |
3305 | return; | |
3306 | } | |
f0706e82 | 3307 | |
b306f453 JB |
3308 | rthdr = (struct ieee80211_tx_status_rtap_hdr*) |
3309 | skb_push(skb, sizeof(*rthdr)); | |
3310 | ||
3311 | memset(rthdr, 0, sizeof(*rthdr)); | |
3312 | rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr)); | |
3313 | rthdr->hdr.it_present = | |
3314 | cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) | | |
3315 | (1 << IEEE80211_RADIOTAP_DATA_RETRIES)); | |
3316 | ||
3317 | if (!(status->flags & IEEE80211_TX_STATUS_ACK) && | |
3318 | !is_multicast_ether_addr(hdr->addr1)) | |
3319 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL); | |
3320 | ||
3321 | if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) && | |
3322 | (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT)) | |
3323 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS); | |
3324 | else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) | |
3325 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS); | |
3326 | ||
3327 | rthdr->data_retries = status->retry_count; | |
3328 | ||
3329 | read_lock(&local->sub_if_lock); | |
3330 | monitors = local->monitors; | |
3331 | list_for_each_entry(sdata, &local->sub_if_list, list) { | |
3332 | /* | |
3333 | * Using the monitors counter is possibly racy, but | |
3334 | * if the value is wrong we simply either clone the skb | |
3335 | * once too much or forget sending it to one monitor iface | |
3336 | * The latter case isn't nice but fixing the race is much | |
3337 | * more complicated. | |
3338 | */ | |
3339 | if (!monitors || !skb) | |
3340 | goto out; | |
3341 | ||
3342 | if (sdata->type == IEEE80211_IF_TYPE_MNTR) { | |
3343 | if (!netif_running(sdata->dev)) | |
3344 | continue; | |
3345 | monitors--; | |
3346 | if (monitors) | |
3347 | skb2 = skb_clone(skb, GFP_KERNEL); | |
3348 | else | |
3349 | skb2 = NULL; | |
3350 | skb->dev = sdata->dev; | |
3351 | /* XXX: is this sufficient for BPF? */ | |
3352 | skb_set_mac_header(skb, 0); | |
3353 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
3354 | skb->pkt_type = PACKET_OTHERHOST; | |
3355 | skb->protocol = htons(ETH_P_802_2); | |
3356 | memset(skb->cb, 0, sizeof(skb->cb)); | |
3357 | netif_rx(skb); | |
3358 | skb = skb2; | |
b306f453 JB |
3359 | } |
3360 | } | |
3361 | out: | |
3362 | read_unlock(&local->sub_if_lock); | |
3363 | if (skb) | |
3364 | dev_kfree_skb(skb); | |
f0706e82 JB |
3365 | } |
3366 | EXPORT_SYMBOL(ieee80211_tx_status); | |
3367 | ||
3368 | /* TODO: implement register/unregister functions for adding TX/RX handlers | |
3369 | * into ordered list */ | |
3370 | ||
f0706e82 JB |
3371 | static ieee80211_tx_handler ieee80211_tx_handlers[] = |
3372 | { | |
3373 | ieee80211_tx_h_check_assoc, | |
3374 | ieee80211_tx_h_sequence, | |
3375 | ieee80211_tx_h_ps_buf, | |
3376 | ieee80211_tx_h_select_key, | |
3377 | ieee80211_tx_h_michael_mic_add, | |
3378 | ieee80211_tx_h_fragment, | |
3379 | ieee80211_tx_h_tkip_encrypt, | |
3380 | ieee80211_tx_h_ccmp_encrypt, | |
3381 | ieee80211_tx_h_wep_encrypt, | |
3382 | ieee80211_tx_h_rate_ctrl, | |
3383 | ieee80211_tx_h_misc, | |
3384 | ieee80211_tx_h_load_stats, | |
3385 | NULL | |
3386 | }; | |
3387 | ||
3388 | ||
3389 | int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr) | |
3390 | { | |
3391 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
3392 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
3393 | struct sta_info *sta; | |
3394 | ||
3395 | if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0) | |
3396 | return 0; | |
3397 | ||
3398 | /* Create STA entry for the new peer */ | |
3399 | sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL); | |
3400 | if (!sta) | |
3401 | return -ENOMEM; | |
3402 | sta_info_put(sta); | |
3403 | ||
3404 | /* Remove STA entry for the old peer */ | |
3405 | sta = sta_info_get(local, sdata->u.wds.remote_addr); | |
3406 | if (sta) { | |
3407 | sta_info_put(sta); | |
3408 | sta_info_free(sta, 0); | |
3409 | } else { | |
3410 | printk(KERN_DEBUG "%s: could not find STA entry for WDS link " | |
3411 | "peer " MAC_FMT "\n", | |
3412 | dev->name, MAC_ARG(sdata->u.wds.remote_addr)); | |
3413 | } | |
3414 | ||
3415 | /* Update WDS link data */ | |
3416 | memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN); | |
3417 | ||
3418 | return 0; | |
3419 | } | |
3420 | ||
3421 | /* Must not be called for mdev and apdev */ | |
3422 | void ieee80211_if_setup(struct net_device *dev) | |
3423 | { | |
3424 | ether_setup(dev); | |
3425 | dev->hard_start_xmit = ieee80211_subif_start_xmit; | |
3426 | dev->wireless_handlers = &ieee80211_iw_handler_def; | |
3427 | dev->set_multicast_list = ieee80211_set_multicast_list; | |
3428 | dev->change_mtu = ieee80211_change_mtu; | |
3429 | dev->get_stats = ieee80211_get_stats; | |
3430 | dev->open = ieee80211_open; | |
3431 | dev->stop = ieee80211_stop; | |
3432 | dev->uninit = ieee80211_if_reinit; | |
3433 | dev->destructor = ieee80211_if_free; | |
3434 | } | |
3435 | ||
3436 | void ieee80211_if_mgmt_setup(struct net_device *dev) | |
3437 | { | |
3438 | ether_setup(dev); | |
3439 | dev->hard_start_xmit = ieee80211_mgmt_start_xmit; | |
3440 | dev->change_mtu = ieee80211_change_mtu_apdev; | |
3441 | dev->get_stats = ieee80211_get_stats; | |
3442 | dev->open = ieee80211_mgmt_open; | |
3443 | dev->stop = ieee80211_mgmt_stop; | |
3444 | dev->type = ARPHRD_IEEE80211_PRISM; | |
3445 | dev->hard_header_parse = header_parse_80211; | |
3446 | dev->uninit = ieee80211_if_reinit; | |
3447 | dev->destructor = ieee80211_if_free; | |
3448 | } | |
3449 | ||
3450 | int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local, | |
3451 | const char *name) | |
3452 | { | |
3453 | struct rate_control_ref *ref, *old; | |
3454 | ||
3455 | ASSERT_RTNL(); | |
3456 | if (local->open_count || netif_running(local->mdev) || | |
3457 | (local->apdev && netif_running(local->apdev))) | |
3458 | return -EBUSY; | |
3459 | ||
3460 | ref = rate_control_alloc(name, local); | |
3461 | if (!ref) { | |
3462 | printk(KERN_WARNING "%s: Failed to select rate control " | |
3463 | "algorithm\n", local->mdev->name); | |
3464 | return -ENOENT; | |
3465 | } | |
3466 | ||
3467 | old = local->rate_ctrl; | |
3468 | local->rate_ctrl = ref; | |
3469 | if (old) { | |
3470 | rate_control_put(old); | |
3471 | sta_info_flush(local, NULL); | |
3472 | } | |
3473 | ||
3474 | printk(KERN_DEBUG "%s: Selected rate control " | |
3475 | "algorithm '%s'\n", local->mdev->name, | |
3476 | ref->ops->name); | |
3477 | ||
3478 | ||
3479 | return 0; | |
3480 | } | |
3481 | ||
3482 | static void rate_control_deinitialize(struct ieee80211_local *local) | |
3483 | { | |
3484 | struct rate_control_ref *ref; | |
3485 | ||
3486 | ref = local->rate_ctrl; | |
3487 | local->rate_ctrl = NULL; | |
3488 | rate_control_put(ref); | |
3489 | } | |
3490 | ||
3491 | struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, | |
3492 | const struct ieee80211_ops *ops) | |
3493 | { | |
3494 | struct net_device *mdev; | |
3495 | struct ieee80211_local *local; | |
3496 | struct ieee80211_sub_if_data *sdata; | |
3497 | int priv_size; | |
3498 | struct wiphy *wiphy; | |
3499 | ||
3500 | /* Ensure 32-byte alignment of our private data and hw private data. | |
3501 | * We use the wiphy priv data for both our ieee80211_local and for | |
3502 | * the driver's private data | |
3503 | * | |
3504 | * In memory it'll be like this: | |
3505 | * | |
3506 | * +-------------------------+ | |
3507 | * | struct wiphy | | |
3508 | * +-------------------------+ | |
3509 | * | struct ieee80211_local | | |
3510 | * +-------------------------+ | |
3511 | * | driver's private data | | |
3512 | * +-------------------------+ | |
3513 | * | |
3514 | */ | |
3515 | priv_size = ((sizeof(struct ieee80211_local) + | |
3516 | NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) + | |
3517 | priv_data_len; | |
3518 | ||
3519 | wiphy = wiphy_new(&mac80211_config_ops, priv_size); | |
3520 | ||
3521 | if (!wiphy) | |
3522 | return NULL; | |
3523 | ||
3524 | wiphy->privid = mac80211_wiphy_privid; | |
3525 | ||
3526 | local = wiphy_priv(wiphy); | |
3527 | local->hw.wiphy = wiphy; | |
3528 | ||
3529 | local->hw.priv = (char *)local + | |
3530 | ((sizeof(struct ieee80211_local) + | |
3531 | NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST); | |
3532 | ||
4480f15c JB |
3533 | BUG_ON(!ops->tx); |
3534 | BUG_ON(!ops->config); | |
3535 | BUG_ON(!ops->add_interface); | |
f0706e82 JB |
3536 | local->ops = ops; |
3537 | ||
3538 | /* for now, mdev needs sub_if_data :/ */ | |
3539 | mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data), | |
3540 | "wmaster%d", ether_setup); | |
3541 | if (!mdev) { | |
3542 | wiphy_free(wiphy); | |
3543 | return NULL; | |
3544 | } | |
3545 | ||
3546 | sdata = IEEE80211_DEV_TO_SUB_IF(mdev); | |
3547 | mdev->ieee80211_ptr = &sdata->wdev; | |
3548 | sdata->wdev.wiphy = wiphy; | |
3549 | ||
3550 | local->hw.queues = 1; /* default */ | |
3551 | ||
3552 | local->mdev = mdev; | |
3553 | local->rx_pre_handlers = ieee80211_rx_pre_handlers; | |
3554 | local->rx_handlers = ieee80211_rx_handlers; | |
3555 | local->tx_handlers = ieee80211_tx_handlers; | |
3556 | ||
3557 | local->bridge_packets = 1; | |
3558 | ||
3559 | local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD; | |
3560 | local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD; | |
3561 | local->short_retry_limit = 7; | |
3562 | local->long_retry_limit = 4; | |
3563 | local->hw.conf.radio_enabled = 1; | |
f0706e82 JB |
3564 | |
3565 | local->enabled_modes = (unsigned int) -1; | |
3566 | ||
3567 | INIT_LIST_HEAD(&local->modes_list); | |
3568 | ||
3569 | rwlock_init(&local->sub_if_lock); | |
3570 | INIT_LIST_HEAD(&local->sub_if_list); | |
3571 | ||
3572 | INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work); | |
3573 | init_timer(&local->stat_timer); | |
3574 | local->stat_timer.function = ieee80211_stat_refresh; | |
3575 | local->stat_timer.data = (unsigned long) local; | |
3576 | ieee80211_rx_bss_list_init(mdev); | |
3577 | ||
3578 | sta_info_init(local); | |
3579 | ||
3580 | mdev->hard_start_xmit = ieee80211_master_start_xmit; | |
3581 | mdev->open = ieee80211_master_open; | |
3582 | mdev->stop = ieee80211_master_stop; | |
3583 | mdev->type = ARPHRD_IEEE80211; | |
3584 | mdev->hard_header_parse = header_parse_80211; | |
3585 | ||
3586 | sdata->type = IEEE80211_IF_TYPE_AP; | |
3587 | sdata->dev = mdev; | |
3588 | sdata->local = local; | |
3589 | sdata->u.ap.force_unicast_rateidx = -1; | |
3590 | sdata->u.ap.max_ratectrl_rateidx = -1; | |
3591 | ieee80211_if_sdata_init(sdata); | |
3592 | list_add_tail(&sdata->list, &local->sub_if_list); | |
3593 | ||
3594 | tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, | |
3595 | (unsigned long)local); | |
3596 | tasklet_disable(&local->tx_pending_tasklet); | |
3597 | ||
3598 | tasklet_init(&local->tasklet, | |
3599 | ieee80211_tasklet_handler, | |
3600 | (unsigned long) local); | |
3601 | tasklet_disable(&local->tasklet); | |
3602 | ||
3603 | skb_queue_head_init(&local->skb_queue); | |
3604 | skb_queue_head_init(&local->skb_queue_unreliable); | |
3605 | ||
3606 | return local_to_hw(local); | |
3607 | } | |
3608 | EXPORT_SYMBOL(ieee80211_alloc_hw); | |
3609 | ||
3610 | int ieee80211_register_hw(struct ieee80211_hw *hw) | |
3611 | { | |
3612 | struct ieee80211_local *local = hw_to_local(hw); | |
3613 | const char *name; | |
3614 | int result; | |
3615 | ||
3616 | result = wiphy_register(local->hw.wiphy); | |
3617 | if (result < 0) | |
3618 | return result; | |
3619 | ||
3620 | name = wiphy_dev(local->hw.wiphy)->driver->name; | |
3621 | local->hw.workqueue = create_singlethread_workqueue(name); | |
3622 | if (!local->hw.workqueue) { | |
3623 | result = -ENOMEM; | |
3624 | goto fail_workqueue; | |
3625 | } | |
3626 | ||
b306f453 JB |
3627 | /* |
3628 | * The hardware needs headroom for sending the frame, | |
3629 | * and we need some headroom for passing the frame to monitor | |
3630 | * interfaces, but never both at the same time. | |
3631 | */ | |
33ccad35 JB |
3632 | local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, |
3633 | sizeof(struct ieee80211_tx_status_rtap_hdr)); | |
b306f453 | 3634 | |
e9f207f0 JB |
3635 | debugfs_hw_add(local); |
3636 | ||
f0706e82 JB |
3637 | local->hw.conf.beacon_int = 1000; |
3638 | ||
3639 | local->wstats_flags |= local->hw.max_rssi ? | |
3640 | IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID; | |
3641 | local->wstats_flags |= local->hw.max_signal ? | |
3642 | IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID; | |
3643 | local->wstats_flags |= local->hw.max_noise ? | |
3644 | IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID; | |
3645 | if (local->hw.max_rssi < 0 || local->hw.max_noise < 0) | |
3646 | local->wstats_flags |= IW_QUAL_DBM; | |
3647 | ||
3648 | result = sta_info_start(local); | |
3649 | if (result < 0) | |
3650 | goto fail_sta_info; | |
3651 | ||
3652 | rtnl_lock(); | |
3653 | result = dev_alloc_name(local->mdev, local->mdev->name); | |
3654 | if (result < 0) | |
3655 | goto fail_dev; | |
3656 | ||
3657 | memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN); | |
3658 | SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy)); | |
3659 | ||
3660 | result = register_netdevice(local->mdev); | |
3661 | if (result < 0) | |
3662 | goto fail_dev; | |
3663 | ||
e9f207f0 JB |
3664 | ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev)); |
3665 | ||
f0706e82 JB |
3666 | result = ieee80211_init_rate_ctrl_alg(local, NULL); |
3667 | if (result < 0) { | |
3668 | printk(KERN_DEBUG "%s: Failed to initialize rate control " | |
3669 | "algorithm\n", local->mdev->name); | |
3670 | goto fail_rate; | |
3671 | } | |
3672 | ||
3673 | result = ieee80211_wep_init(local); | |
3674 | ||
3675 | if (result < 0) { | |
3676 | printk(KERN_DEBUG "%s: Failed to initialize wep\n", | |
3677 | local->mdev->name); | |
3678 | goto fail_wep; | |
3679 | } | |
3680 | ||
3681 | ieee80211_install_qdisc(local->mdev); | |
3682 | ||
3683 | /* add one default STA interface */ | |
3684 | result = ieee80211_if_add(local->mdev, "wlan%d", NULL, | |
3685 | IEEE80211_IF_TYPE_STA); | |
3686 | if (result) | |
3687 | printk(KERN_WARNING "%s: Failed to add default virtual iface\n", | |
3688 | local->mdev->name); | |
3689 | ||
3690 | local->reg_state = IEEE80211_DEV_REGISTERED; | |
3691 | rtnl_unlock(); | |
3692 | ||
3693 | ieee80211_led_init(local); | |
3694 | ||
3695 | return 0; | |
3696 | ||
3697 | fail_wep: | |
3698 | rate_control_deinitialize(local); | |
3699 | fail_rate: | |
e9f207f0 | 3700 | ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev)); |
f0706e82 JB |
3701 | unregister_netdevice(local->mdev); |
3702 | fail_dev: | |
3703 | rtnl_unlock(); | |
3704 | sta_info_stop(local); | |
3705 | fail_sta_info: | |
e9f207f0 | 3706 | debugfs_hw_del(local); |
f0706e82 JB |
3707 | destroy_workqueue(local->hw.workqueue); |
3708 | fail_workqueue: | |
3709 | wiphy_unregister(local->hw.wiphy); | |
3710 | return result; | |
3711 | } | |
3712 | EXPORT_SYMBOL(ieee80211_register_hw); | |
3713 | ||
3714 | int ieee80211_register_hwmode(struct ieee80211_hw *hw, | |
3715 | struct ieee80211_hw_mode *mode) | |
3716 | { | |
3717 | struct ieee80211_local *local = hw_to_local(hw); | |
3718 | struct ieee80211_rate *rate; | |
3719 | int i; | |
3720 | ||
3721 | INIT_LIST_HEAD(&mode->list); | |
3722 | list_add_tail(&mode->list, &local->modes_list); | |
3723 | ||
3724 | local->hw_modes |= (1 << mode->mode); | |
3725 | for (i = 0; i < mode->num_rates; i++) { | |
3726 | rate = &(mode->rates[i]); | |
3727 | rate->rate_inv = CHAN_UTIL_RATE_LCM / rate->rate; | |
3728 | } | |
3729 | ieee80211_prepare_rates(local, mode); | |
3730 | ||
3731 | if (!local->oper_hw_mode) { | |
3732 | /* Default to this mode */ | |
3733 | local->hw.conf.phymode = mode->mode; | |
3734 | local->oper_hw_mode = local->scan_hw_mode = mode; | |
3735 | local->oper_channel = local->scan_channel = &mode->channels[0]; | |
3736 | local->hw.conf.mode = local->oper_hw_mode; | |
3737 | local->hw.conf.chan = local->oper_channel; | |
3738 | } | |
3739 | ||
3740 | if (!(hw->flags & IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED)) | |
fd8bacc9 | 3741 | ieee80211_set_default_regdomain(mode); |
f0706e82 JB |
3742 | |
3743 | return 0; | |
3744 | } | |
3745 | EXPORT_SYMBOL(ieee80211_register_hwmode); | |
3746 | ||
3747 | void ieee80211_unregister_hw(struct ieee80211_hw *hw) | |
3748 | { | |
3749 | struct ieee80211_local *local = hw_to_local(hw); | |
3750 | struct ieee80211_sub_if_data *sdata, *tmp; | |
3751 | struct list_head tmp_list; | |
3752 | int i; | |
3753 | ||
3754 | tasklet_kill(&local->tx_pending_tasklet); | |
3755 | tasklet_kill(&local->tasklet); | |
3756 | ||
3757 | rtnl_lock(); | |
3758 | ||
3759 | BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED); | |
3760 | ||
3761 | local->reg_state = IEEE80211_DEV_UNREGISTERED; | |
3762 | if (local->apdev) | |
3763 | ieee80211_if_del_mgmt(local); | |
3764 | ||
3765 | write_lock_bh(&local->sub_if_lock); | |
3766 | list_replace_init(&local->sub_if_list, &tmp_list); | |
3767 | write_unlock_bh(&local->sub_if_lock); | |
3768 | ||
3769 | list_for_each_entry_safe(sdata, tmp, &tmp_list, list) | |
3770 | __ieee80211_if_del(local, sdata); | |
3771 | ||
3772 | rtnl_unlock(); | |
3773 | ||
3774 | if (local->stat_time) | |
3775 | del_timer_sync(&local->stat_timer); | |
3776 | ||
3777 | ieee80211_rx_bss_list_deinit(local->mdev); | |
3778 | ieee80211_clear_tx_pending(local); | |
3779 | sta_info_stop(local); | |
3780 | rate_control_deinitialize(local); | |
e9f207f0 | 3781 | debugfs_hw_del(local); |
f0706e82 JB |
3782 | |
3783 | for (i = 0; i < NUM_IEEE80211_MODES; i++) { | |
3784 | kfree(local->supp_rates[i]); | |
3785 | kfree(local->basic_rates[i]); | |
3786 | } | |
3787 | ||
3788 | if (skb_queue_len(&local->skb_queue) | |
3789 | || skb_queue_len(&local->skb_queue_unreliable)) | |
3790 | printk(KERN_WARNING "%s: skb_queue not empty\n", | |
3791 | local->mdev->name); | |
3792 | skb_queue_purge(&local->skb_queue); | |
3793 | skb_queue_purge(&local->skb_queue_unreliable); | |
3794 | ||
3795 | destroy_workqueue(local->hw.workqueue); | |
3796 | wiphy_unregister(local->hw.wiphy); | |
3797 | ieee80211_wep_free(local); | |
3798 | ieee80211_led_exit(local); | |
3799 | } | |
3800 | EXPORT_SYMBOL(ieee80211_unregister_hw); | |
3801 | ||
3802 | void ieee80211_free_hw(struct ieee80211_hw *hw) | |
3803 | { | |
3804 | struct ieee80211_local *local = hw_to_local(hw); | |
3805 | ||
3806 | ieee80211_if_free(local->mdev); | |
3807 | wiphy_free(local->hw.wiphy); | |
3808 | } | |
3809 | EXPORT_SYMBOL(ieee80211_free_hw); | |
3810 | ||
3811 | void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue) | |
3812 | { | |
3813 | struct ieee80211_local *local = hw_to_local(hw); | |
3814 | ||
3815 | if (test_and_clear_bit(IEEE80211_LINK_STATE_XOFF, | |
3816 | &local->state[queue])) { | |
3817 | if (test_bit(IEEE80211_LINK_STATE_PENDING, | |
3818 | &local->state[queue])) | |
3819 | tasklet_schedule(&local->tx_pending_tasklet); | |
3820 | else | |
3821 | if (!ieee80211_qdisc_installed(local->mdev)) { | |
3822 | if (queue == 0) | |
3823 | netif_wake_queue(local->mdev); | |
3824 | } else | |
3825 | __netif_schedule(local->mdev); | |
3826 | } | |
3827 | } | |
3828 | EXPORT_SYMBOL(ieee80211_wake_queue); | |
3829 | ||
3830 | void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue) | |
3831 | { | |
3832 | struct ieee80211_local *local = hw_to_local(hw); | |
3833 | ||
3834 | if (!ieee80211_qdisc_installed(local->mdev) && queue == 0) | |
3835 | netif_stop_queue(local->mdev); | |
3836 | set_bit(IEEE80211_LINK_STATE_XOFF, &local->state[queue]); | |
3837 | } | |
3838 | EXPORT_SYMBOL(ieee80211_stop_queue); | |
3839 | ||
3840 | void ieee80211_start_queues(struct ieee80211_hw *hw) | |
3841 | { | |
3842 | struct ieee80211_local *local = hw_to_local(hw); | |
3843 | int i; | |
3844 | ||
3845 | for (i = 0; i < local->hw.queues; i++) | |
3846 | clear_bit(IEEE80211_LINK_STATE_XOFF, &local->state[i]); | |
3847 | if (!ieee80211_qdisc_installed(local->mdev)) | |
3848 | netif_start_queue(local->mdev); | |
3849 | } | |
3850 | EXPORT_SYMBOL(ieee80211_start_queues); | |
3851 | ||
3852 | void ieee80211_stop_queues(struct ieee80211_hw *hw) | |
3853 | { | |
3854 | int i; | |
3855 | ||
3856 | for (i = 0; i < hw->queues; i++) | |
3857 | ieee80211_stop_queue(hw, i); | |
3858 | } | |
3859 | EXPORT_SYMBOL(ieee80211_stop_queues); | |
3860 | ||
3861 | void ieee80211_wake_queues(struct ieee80211_hw *hw) | |
3862 | { | |
3863 | int i; | |
3864 | ||
3865 | for (i = 0; i < hw->queues; i++) | |
3866 | ieee80211_wake_queue(hw, i); | |
3867 | } | |
3868 | EXPORT_SYMBOL(ieee80211_wake_queues); | |
3869 | ||
3870 | struct net_device_stats *ieee80211_dev_stats(struct net_device *dev) | |
3871 | { | |
3872 | struct ieee80211_sub_if_data *sdata; | |
3873 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
3874 | return &sdata->stats; | |
3875 | } | |
3876 | ||
3877 | static int __init ieee80211_init(void) | |
3878 | { | |
3879 | struct sk_buff *skb; | |
3880 | int ret; | |
3881 | ||
3882 | BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb)); | |
3883 | ||
3884 | ret = ieee80211_wme_register(); | |
3885 | if (ret) { | |
3886 | printk(KERN_DEBUG "ieee80211_init: failed to " | |
3887 | "initialize WME (err=%d)\n", ret); | |
3888 | return ret; | |
3889 | } | |
3890 | ||
e9f207f0 | 3891 | ieee80211_debugfs_netdev_init(); |
fd8bacc9 | 3892 | ieee80211_regdomain_init(); |
e9f207f0 | 3893 | |
f0706e82 JB |
3894 | return 0; |
3895 | } | |
3896 | ||
3897 | ||
3898 | static void __exit ieee80211_exit(void) | |
3899 | { | |
3900 | ieee80211_wme_unregister(); | |
e9f207f0 | 3901 | ieee80211_debugfs_netdev_exit(); |
f0706e82 JB |
3902 | } |
3903 | ||
3904 | ||
ca9938fe | 3905 | subsys_initcall(ieee80211_init); |
f0706e82 JB |
3906 | module_exit(ieee80211_exit); |
3907 | ||
3908 | MODULE_DESCRIPTION("IEEE 802.11 subsystem"); | |
3909 | MODULE_LICENSE("GPL"); |