2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
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.
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>
28 #include "ieee80211_common.h"
29 #include "ieee80211_i.h"
30 #include "ieee80211_rate.h"
36 #include "ieee80211_led.h"
37 #include "ieee80211_cfg.h"
39 #include "debugfs_netdev.h"
40 #include "debugfs_key.h"
42 /* privid for wiphys to determine whether they belong to us or not */
43 void *mac80211_wiphy_privid
= &mac80211_wiphy_privid
;
45 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
46 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */
47 static const unsigned char rfc1042_header
[] =
48 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
50 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
51 static const unsigned char bridge_tunnel_header
[] =
52 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
54 /* No encapsulation header if EtherType < 0x600 (=length) */
55 static const unsigned char eapol_header
[] =
56 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00, 0x88, 0x8e };
59 static inline void ieee80211_include_sequence(struct ieee80211_sub_if_data
*sdata
,
60 struct ieee80211_hdr
*hdr
)
62 /* Set the sequence number for this frame. */
63 hdr
->seq_ctrl
= cpu_to_le16(sdata
->sequence
);
65 /* Increase the sequence number. */
66 sdata
->sequence
= (sdata
->sequence
+ 0x10) & IEEE80211_SCTL_SEQ
;
69 struct ieee80211_key_conf
*
70 ieee80211_key_data2conf(struct ieee80211_local
*local
,
71 const struct ieee80211_key
*data
)
73 struct ieee80211_key_conf
*conf
;
75 conf
= kmalloc(sizeof(*conf
) + data
->keylen
, GFP_ATOMIC
);
79 conf
->hw_key_idx
= data
->hw_key_idx
;
80 conf
->alg
= data
->alg
;
81 conf
->keylen
= data
->keylen
;
83 if (data
->force_sw_encrypt
)
84 conf
->flags
|= IEEE80211_KEY_FORCE_SW_ENCRYPT
;
85 conf
->keyidx
= data
->keyidx
;
86 if (data
->default_tx_key
)
87 conf
->flags
|= IEEE80211_KEY_DEFAULT_TX_KEY
;
88 if (local
->default_wep_only
)
89 conf
->flags
|= IEEE80211_KEY_DEFAULT_WEP_ONLY
;
90 memcpy(conf
->key
, data
->key
, data
->keylen
);
95 struct ieee80211_key
*ieee80211_key_alloc(struct ieee80211_sub_if_data
*sdata
,
96 int idx
, size_t key_len
, gfp_t flags
)
98 struct ieee80211_key
*key
;
100 key
= kzalloc(sizeof(struct ieee80211_key
) + key_len
, flags
);
103 kref_init(&key
->kref
);
107 static void ieee80211_key_release(struct kref
*kref
)
109 struct ieee80211_key
*key
;
111 key
= container_of(kref
, struct ieee80211_key
, kref
);
112 if (key
->alg
== ALG_CCMP
)
113 ieee80211_aes_key_free(key
->u
.ccmp
.tfm
);
114 ieee80211_debugfs_key_remove(key
);
118 void ieee80211_key_free(struct ieee80211_key
*key
)
121 kref_put(&key
->kref
, ieee80211_key_release
);
124 static int rate_list_match(const int *rate_list
, int rate
)
131 for (i
= 0; rate_list
[i
] >= 0; i
++)
132 if (rate_list
[i
] == rate
)
139 void ieee80211_prepare_rates(struct ieee80211_local
*local
,
140 struct ieee80211_hw_mode
*mode
)
144 for (i
= 0; i
< mode
->num_rates
; i
++) {
145 struct ieee80211_rate
*rate
= &mode
->rates
[i
];
147 rate
->flags
&= ~(IEEE80211_RATE_SUPPORTED
|
148 IEEE80211_RATE_BASIC
);
150 if (local
->supp_rates
[mode
->mode
]) {
151 if (!rate_list_match(local
->supp_rates
[mode
->mode
],
156 rate
->flags
|= IEEE80211_RATE_SUPPORTED
;
158 /* Use configured basic rate set if it is available. If not,
159 * use defaults that are sane for most cases. */
160 if (local
->basic_rates
[mode
->mode
]) {
161 if (rate_list_match(local
->basic_rates
[mode
->mode
],
163 rate
->flags
|= IEEE80211_RATE_BASIC
;
164 } else switch (mode
->mode
) {
165 case MODE_IEEE80211A
:
166 if (rate
->rate
== 60 || rate
->rate
== 120 ||
168 rate
->flags
|= IEEE80211_RATE_BASIC
;
170 case MODE_IEEE80211B
:
171 if (rate
->rate
== 10 || rate
->rate
== 20)
172 rate
->flags
|= IEEE80211_RATE_BASIC
;
174 case MODE_ATHEROS_TURBO
:
175 if (rate
->rate
== 120 || rate
->rate
== 240 ||
177 rate
->flags
|= IEEE80211_RATE_BASIC
;
179 case MODE_IEEE80211G
:
180 if (rate
->rate
== 10 || rate
->rate
== 20 ||
181 rate
->rate
== 55 || rate
->rate
== 110)
182 rate
->flags
|= IEEE80211_RATE_BASIC
;
186 /* Set ERP and MANDATORY flags based on phymode */
187 switch (mode
->mode
) {
188 case MODE_IEEE80211A
:
189 if (rate
->rate
== 60 || rate
->rate
== 120 ||
191 rate
->flags
|= IEEE80211_RATE_MANDATORY
;
193 case MODE_IEEE80211B
:
194 if (rate
->rate
== 10)
195 rate
->flags
|= IEEE80211_RATE_MANDATORY
;
197 case MODE_ATHEROS_TURBO
:
199 case MODE_IEEE80211G
:
200 if (rate
->rate
== 10 || rate
->rate
== 20 ||
201 rate
->rate
== 55 || rate
->rate
== 110 ||
202 rate
->rate
== 60 || rate
->rate
== 120 ||
204 rate
->flags
|= IEEE80211_RATE_MANDATORY
;
207 if (ieee80211_is_erp_rate(mode
->mode
, rate
->rate
))
208 rate
->flags
|= IEEE80211_RATE_ERP
;
213 static void ieee80211_key_threshold_notify(struct net_device
*dev
,
214 struct ieee80211_key
*key
,
215 struct sta_info
*sta
)
217 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
219 struct ieee80211_msg_key_notification
*msg
;
221 /* if no one will get it anyway, don't even allocate it.
222 * unlikely because this is only relevant for APs
223 * where the device must be open... */
224 if (unlikely(!local
->apdev
))
227 skb
= dev_alloc_skb(sizeof(struct ieee80211_frame_info
) +
228 sizeof(struct ieee80211_msg_key_notification
));
232 skb_reserve(skb
, sizeof(struct ieee80211_frame_info
));
233 msg
= (struct ieee80211_msg_key_notification
*)
234 skb_put(skb
, sizeof(struct ieee80211_msg_key_notification
));
235 msg
->tx_rx_count
= key
->tx_rx_count
;
236 memcpy(msg
->ifname
, dev
->name
, IFNAMSIZ
);
238 memcpy(msg
->addr
, sta
->addr
, ETH_ALEN
);
240 memset(msg
->addr
, 0xff, ETH_ALEN
);
242 key
->tx_rx_count
= 0;
244 ieee80211_rx_mgmt(local
, skb
, NULL
,
245 ieee80211_msg_key_threshold_notification
);
249 static u8
* ieee80211_get_bssid(struct ieee80211_hdr
*hdr
, size_t len
)
256 fc
= le16_to_cpu(hdr
->frame_control
);
258 switch (fc
& IEEE80211_FCTL_FTYPE
) {
259 case IEEE80211_FTYPE_DATA
:
260 switch (fc
& (IEEE80211_FCTL_TODS
| IEEE80211_FCTL_FROMDS
)) {
261 case IEEE80211_FCTL_TODS
:
263 case (IEEE80211_FCTL_TODS
| IEEE80211_FCTL_FROMDS
):
265 case IEEE80211_FCTL_FROMDS
:
271 case IEEE80211_FTYPE_MGMT
:
273 case IEEE80211_FTYPE_CTL
:
274 if ((fc
& IEEE80211_FCTL_STYPE
) == IEEE80211_STYPE_PSPOLL
)
283 int ieee80211_get_hdrlen(u16 fc
)
287 switch (fc
& IEEE80211_FCTL_FTYPE
) {
288 case IEEE80211_FTYPE_DATA
:
289 if ((fc
& IEEE80211_FCTL_FROMDS
) && (fc
& IEEE80211_FCTL_TODS
))
290 hdrlen
= 30; /* Addr4 */
292 * The QoS Control field is two bytes and its presence is
293 * indicated by the IEEE80211_STYPE_QOS_DATA bit. Add 2 to
294 * hdrlen if that bit is set.
295 * This works by masking out the bit and shifting it to
296 * bit position 1 so the result has the value 0 or 2.
298 hdrlen
+= (fc
& IEEE80211_STYPE_QOS_DATA
)
299 >> (ilog2(IEEE80211_STYPE_QOS_DATA
)-1);
301 case IEEE80211_FTYPE_CTL
:
303 * ACK and CTS are 10 bytes, all others 16. To see how
304 * to get this condition consider
305 * subtype mask: 0b0000000011110000 (0x00F0)
306 * ACK subtype: 0b0000000011010000 (0x00D0)
307 * CTS subtype: 0b0000000011000000 (0x00C0)
308 * bits that matter: ^^^ (0x00E0)
309 * value of those: 0b0000000011000000 (0x00C0)
311 if ((fc
& 0xE0) == 0xC0)
320 EXPORT_SYMBOL(ieee80211_get_hdrlen
);
322 int ieee80211_get_hdrlen_from_skb(const struct sk_buff
*skb
)
324 const struct ieee80211_hdr
*hdr
= (const struct ieee80211_hdr
*) skb
->data
;
327 if (unlikely(skb
->len
< 10))
329 hdrlen
= ieee80211_get_hdrlen(le16_to_cpu(hdr
->frame_control
));
330 if (unlikely(hdrlen
> skb
->len
))
334 EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb
);
336 static int ieee80211_get_radiotap_len(struct sk_buff
*skb
)
338 struct ieee80211_radiotap_header
*hdr
=
339 (struct ieee80211_radiotap_header
*) skb
->data
;
341 return le16_to_cpu(hdr
->it_len
);
344 #ifdef CONFIG_MAC80211_LOWTX_FRAME_DUMP
345 static void ieee80211_dump_frame(const char *ifname
, const char *title
,
346 const struct sk_buff
*skb
)
348 const struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
352 printk(KERN_DEBUG
"%s: %s (len=%d)", ifname
, title
, skb
->len
);
358 fc
= le16_to_cpu(hdr
->frame_control
);
359 hdrlen
= ieee80211_get_hdrlen(fc
);
360 if (hdrlen
> skb
->len
)
363 printk(" FC=0x%04x DUR=0x%04x",
364 fc
, le16_to_cpu(hdr
->duration_id
));
366 printk(" A1=" MAC_FMT
, MAC_ARG(hdr
->addr1
));
368 printk(" A2=" MAC_FMT
, MAC_ARG(hdr
->addr2
));
370 printk(" A3=" MAC_FMT
, MAC_ARG(hdr
->addr3
));
372 printk(" A4=" MAC_FMT
, MAC_ARG(hdr
->addr4
));
375 #else /* CONFIG_MAC80211_LOWTX_FRAME_DUMP */
376 static inline void ieee80211_dump_frame(const char *ifname
, const char *title
,
380 #endif /* CONFIG_MAC80211_LOWTX_FRAME_DUMP */
383 static int ieee80211_is_eapol(const struct sk_buff
*skb
)
385 const struct ieee80211_hdr
*hdr
;
389 if (unlikely(skb
->len
< 10))
392 hdr
= (const struct ieee80211_hdr
*) skb
->data
;
393 fc
= le16_to_cpu(hdr
->frame_control
);
395 if (unlikely(!WLAN_FC_DATA_PRESENT(fc
)))
398 hdrlen
= ieee80211_get_hdrlen(fc
);
400 if (unlikely(skb
->len
>= hdrlen
+ sizeof(eapol_header
) &&
401 memcmp(skb
->data
+ hdrlen
, eapol_header
,
402 sizeof(eapol_header
)) == 0))
409 static ieee80211_txrx_result
410 ieee80211_tx_h_rate_ctrl(struct ieee80211_txrx_data
*tx
)
412 struct rate_control_extra extra
;
414 memset(&extra
, 0, sizeof(extra
));
415 extra
.mode
= tx
->u
.tx
.mode
;
416 extra
.mgmt_data
= tx
->sdata
&&
417 tx
->sdata
->type
== IEEE80211_IF_TYPE_MGMT
;
418 extra
.ethertype
= tx
->ethertype
;
420 tx
->u
.tx
.rate
= rate_control_get_rate(tx
->local
, tx
->dev
, tx
->skb
,
422 if (unlikely(extra
.probe
!= NULL
)) {
423 tx
->u
.tx
.control
->flags
|= IEEE80211_TXCTL_RATE_CTRL_PROBE
;
424 tx
->u
.tx
.probe_last_frag
= 1;
425 tx
->u
.tx
.control
->alt_retry_rate
= tx
->u
.tx
.rate
->val
;
426 tx
->u
.tx
.rate
= extra
.probe
;
428 tx
->u
.tx
.control
->alt_retry_rate
= -1;
432 if (tx
->u
.tx
.mode
->mode
== MODE_IEEE80211G
&&
433 tx
->local
->cts_protect_erp_frames
&& tx
->fragmented
&&
435 tx
->u
.tx
.last_frag_rate
= tx
->u
.tx
.rate
;
436 tx
->u
.tx
.probe_last_frag
= extra
.probe
? 1 : 0;
438 tx
->u
.tx
.rate
= extra
.nonerp
;
439 tx
->u
.tx
.control
->rate
= extra
.nonerp
;
440 tx
->u
.tx
.control
->flags
&= ~IEEE80211_TXCTL_RATE_CTRL_PROBE
;
442 tx
->u
.tx
.last_frag_rate
= tx
->u
.tx
.rate
;
443 tx
->u
.tx
.control
->rate
= tx
->u
.tx
.rate
;
445 tx
->u
.tx
.control
->tx_rate
= tx
->u
.tx
.rate
->val
;
446 if ((tx
->u
.tx
.rate
->flags
& IEEE80211_RATE_PREAMBLE2
) &&
447 tx
->local
->short_preamble
&&
448 (!tx
->sta
|| (tx
->sta
->flags
& WLAN_STA_SHORT_PREAMBLE
))) {
449 tx
->u
.tx
.short_preamble
= 1;
450 tx
->u
.tx
.control
->tx_rate
= tx
->u
.tx
.rate
->val2
;
453 return TXRX_CONTINUE
;
457 static ieee80211_txrx_result
458 ieee80211_tx_h_select_key(struct ieee80211_txrx_data
*tx
)
461 tx
->u
.tx
.control
->key_idx
= tx
->sta
->key_idx_compression
;
463 tx
->u
.tx
.control
->key_idx
= HW_KEY_IDX_INVALID
;
465 if (unlikely(tx
->u
.tx
.control
->flags
& IEEE80211_TXCTL_DO_NOT_ENCRYPT
))
467 else if (tx
->sta
&& tx
->sta
->key
)
468 tx
->key
= tx
->sta
->key
;
469 else if (tx
->sdata
->default_key
)
470 tx
->key
= tx
->sdata
->default_key
;
471 else if (tx
->sdata
->drop_unencrypted
&&
472 !(tx
->sdata
->eapol
&& ieee80211_is_eapol(tx
->skb
))) {
473 I802_DEBUG_INC(tx
->local
->tx_handlers_drop_unencrypted
);
479 tx
->key
->tx_rx_count
++;
480 if (unlikely(tx
->local
->key_tx_rx_threshold
&&
481 tx
->key
->tx_rx_count
>
482 tx
->local
->key_tx_rx_threshold
)) {
483 ieee80211_key_threshold_notify(tx
->dev
, tx
->key
,
488 return TXRX_CONTINUE
;
492 static ieee80211_txrx_result
493 ieee80211_tx_h_fragment(struct ieee80211_txrx_data
*tx
)
495 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) tx
->skb
->data
;
496 size_t hdrlen
, per_fragm
, num_fragm
, payload_len
, left
;
497 struct sk_buff
**frags
, *first
, *frag
;
501 int frag_threshold
= tx
->local
->fragmentation_threshold
;
504 return TXRX_CONTINUE
;
508 hdrlen
= ieee80211_get_hdrlen(tx
->fc
);
509 payload_len
= first
->len
- hdrlen
;
510 per_fragm
= frag_threshold
- hdrlen
- FCS_LEN
;
511 num_fragm
= (payload_len
+ per_fragm
- 1) / per_fragm
;
513 frags
= kzalloc(num_fragm
* sizeof(struct sk_buff
*), GFP_ATOMIC
);
517 hdr
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_MOREFRAGS
);
518 seq
= le16_to_cpu(hdr
->seq_ctrl
) & IEEE80211_SCTL_SEQ
;
519 pos
= first
->data
+ hdrlen
+ per_fragm
;
520 left
= payload_len
- per_fragm
;
521 for (i
= 0; i
< num_fragm
- 1; i
++) {
522 struct ieee80211_hdr
*fhdr
;
528 /* reserve enough extra head and tail room for possible
531 dev_alloc_skb(tx
->local
->hw
.extra_tx_headroom
+
533 IEEE80211_ENCRYPT_HEADROOM
+
534 IEEE80211_ENCRYPT_TAILROOM
);
537 /* Make sure that all fragments use the same priority so
538 * that they end up using the same TX queue */
539 frag
->priority
= first
->priority
;
540 skb_reserve(frag
, tx
->local
->hw
.extra_tx_headroom
+
541 IEEE80211_ENCRYPT_HEADROOM
);
542 fhdr
= (struct ieee80211_hdr
*) skb_put(frag
, hdrlen
);
543 memcpy(fhdr
, first
->data
, hdrlen
);
544 if (i
== num_fragm
- 2)
545 fhdr
->frame_control
&= cpu_to_le16(~IEEE80211_FCTL_MOREFRAGS
);
546 fhdr
->seq_ctrl
= cpu_to_le16(seq
| ((i
+ 1) & IEEE80211_SCTL_FRAG
));
547 copylen
= left
> per_fragm
? per_fragm
: left
;
548 memcpy(skb_put(frag
, copylen
), pos
, copylen
);
553 skb_trim(first
, hdrlen
+ per_fragm
);
555 tx
->u
.tx
.num_extra_frag
= num_fragm
- 1;
556 tx
->u
.tx
.extra_frag
= frags
;
558 return TXRX_CONTINUE
;
561 printk(KERN_DEBUG
"%s: failed to fragment frame\n", tx
->dev
->name
);
563 for (i
= 0; i
< num_fragm
- 1; i
++)
565 dev_kfree_skb(frags
[i
]);
568 I802_DEBUG_INC(tx
->local
->tx_handlers_drop_fragment
);
573 static int wep_encrypt_skb(struct ieee80211_txrx_data
*tx
, struct sk_buff
*skb
)
575 if (tx
->key
->force_sw_encrypt
) {
576 if (ieee80211_wep_encrypt(tx
->local
, skb
, tx
->key
))
579 tx
->u
.tx
.control
->key_idx
= tx
->key
->hw_key_idx
;
580 if (tx
->local
->hw
.flags
& IEEE80211_HW_WEP_INCLUDE_IV
) {
581 if (ieee80211_wep_add_iv(tx
->local
, skb
, tx
->key
) ==
590 void ieee80211_tx_set_iswep(struct ieee80211_txrx_data
*tx
)
592 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) tx
->skb
->data
;
594 hdr
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PROTECTED
);
595 if (tx
->u
.tx
.extra_frag
) {
596 struct ieee80211_hdr
*fhdr
;
598 for (i
= 0; i
< tx
->u
.tx
.num_extra_frag
; i
++) {
599 fhdr
= (struct ieee80211_hdr
*)
600 tx
->u
.tx
.extra_frag
[i
]->data
;
601 fhdr
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_PROTECTED
);
607 static ieee80211_txrx_result
608 ieee80211_tx_h_wep_encrypt(struct ieee80211_txrx_data
*tx
)
610 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) tx
->skb
->data
;
613 fc
= le16_to_cpu(hdr
->frame_control
);
615 if (!tx
->key
|| tx
->key
->alg
!= ALG_WEP
||
616 ((fc
& IEEE80211_FCTL_FTYPE
) != IEEE80211_FTYPE_DATA
&&
617 ((fc
& IEEE80211_FCTL_FTYPE
) != IEEE80211_FTYPE_MGMT
||
618 (fc
& IEEE80211_FCTL_STYPE
) != IEEE80211_STYPE_AUTH
)))
619 return TXRX_CONTINUE
;
621 tx
->u
.tx
.control
->iv_len
= WEP_IV_LEN
;
622 tx
->u
.tx
.control
->icv_len
= WEP_ICV_LEN
;
623 ieee80211_tx_set_iswep(tx
);
625 if (wep_encrypt_skb(tx
, tx
->skb
) < 0) {
626 I802_DEBUG_INC(tx
->local
->tx_handlers_drop_wep
);
630 if (tx
->u
.tx
.extra_frag
) {
632 for (i
= 0; i
< tx
->u
.tx
.num_extra_frag
; i
++) {
633 if (wep_encrypt_skb(tx
, tx
->u
.tx
.extra_frag
[i
]) < 0) {
634 I802_DEBUG_INC(tx
->local
->
635 tx_handlers_drop_wep
);
641 return TXRX_CONTINUE
;
645 static int ieee80211_frame_duration(struct ieee80211_local
*local
, size_t len
,
646 int rate
, int erp
, int short_preamble
)
650 /* calculate duration (in microseconds, rounded up to next higher
651 * integer if it includes a fractional microsecond) to send frame of
652 * len bytes (does not include FCS) at the given rate. Duration will
655 * rate is in 100 kbps, so divident is multiplied by 10 in the
656 * DIV_ROUND_UP() operations.
659 if (local
->hw
.conf
.phymode
== MODE_IEEE80211A
|| erp
||
660 local
->hw
.conf
.phymode
== MODE_ATHEROS_TURBO
) {
664 * N_DBPS = DATARATE x 4
665 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
666 * (16 = SIGNAL time, 6 = tail bits)
667 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
670 * 802.11a - 17.5.2: aSIFSTime = 16 usec
671 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
672 * signal ext = 6 usec
674 /* FIX: Atheros Turbo may have different (shorter) duration? */
675 dur
= 16; /* SIFS + signal ext */
676 dur
+= 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */
677 dur
+= 4; /* 17.3.2.3: T_SIGNAL = 4 usec */
678 dur
+= 4 * DIV_ROUND_UP((16 + 8 * (len
+ 4) + 6) * 10,
679 4 * rate
); /* T_SYM x N_SYM */
682 * 802.11b or 802.11g with 802.11b compatibility:
683 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
684 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
686 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
687 * aSIFSTime = 10 usec
688 * aPreambleLength = 144 usec or 72 usec with short preamble
689 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
691 dur
= 10; /* aSIFSTime = 10 usec */
692 dur
+= short_preamble
? (72 + 24) : (144 + 48);
694 dur
+= DIV_ROUND_UP(8 * (len
+ 4) * 10, rate
);
701 /* Exported duration function for driver use */
702 __le16
ieee80211_generic_frame_duration(struct ieee80211_hw
*hw
,
703 size_t frame_len
, int rate
)
705 struct ieee80211_local
*local
= hw_to_local(hw
);
709 erp
= ieee80211_is_erp_rate(hw
->conf
.phymode
, rate
);
710 dur
= ieee80211_frame_duration(local
, frame_len
, rate
,
711 erp
, local
->short_preamble
);
713 return cpu_to_le16(dur
);
715 EXPORT_SYMBOL(ieee80211_generic_frame_duration
);
718 static u16
ieee80211_duration(struct ieee80211_txrx_data
*tx
, int group_addr
,
721 int rate
, mrate
, erp
, dur
, i
;
722 struct ieee80211_rate
*txrate
= tx
->u
.tx
.rate
;
723 struct ieee80211_local
*local
= tx
->local
;
724 struct ieee80211_hw_mode
*mode
= tx
->u
.tx
.mode
;
726 erp
= txrate
->flags
& IEEE80211_RATE_ERP
;
729 * data and mgmt (except PS Poll):
730 * - during CFP: 32768
731 * - during contention period:
732 * if addr1 is group address: 0
733 * if more fragments = 0 and addr1 is individual address: time to
734 * transmit one ACK plus SIFS
735 * if more fragments = 1 and addr1 is individual address: time to
736 * transmit next fragment plus 2 x ACK plus 3 x SIFS
739 * - control response frame (CTS or ACK) shall be transmitted using the
740 * same rate as the immediately previous frame in the frame exchange
741 * sequence, if this rate belongs to the PHY mandatory rates, or else
742 * at the highest possible rate belonging to the PHY rates in the
746 if ((tx
->fc
& IEEE80211_FCTL_FTYPE
) == IEEE80211_FTYPE_CTL
) {
747 /* TODO: These control frames are not currently sent by
748 * 80211.o, but should they be implemented, this function
749 * needs to be updated to support duration field calculation.
751 * RTS: time needed to transmit pending data/mgmt frame plus
752 * one CTS frame plus one ACK frame plus 3 x SIFS
753 * CTS: duration of immediately previous RTS minus time
754 * required to transmit CTS and its SIFS
755 * ACK: 0 if immediately previous directed data/mgmt had
756 * more=0, with more=1 duration in ACK frame is duration
757 * from previous frame minus time needed to transmit ACK
759 * PS Poll: BIT(15) | BIT(14) | aid
765 if (0 /* FIX: data/mgmt during CFP */)
768 if (group_addr
) /* Group address as the destination - no ACK */
771 /* Individual destination address:
772 * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes)
773 * CTS and ACK frames shall be transmitted using the highest rate in
774 * basic rate set that is less than or equal to the rate of the
775 * immediately previous frame and that is using the same modulation
776 * (CCK or OFDM). If no basic rate set matches with these requirements,
777 * the highest mandatory rate of the PHY that is less than or equal to
778 * the rate of the previous frame is used.
779 * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps
782 mrate
= 10; /* use 1 Mbps if everything fails */
783 for (i
= 0; i
< mode
->num_rates
; i
++) {
784 struct ieee80211_rate
*r
= &mode
->rates
[i
];
785 if (r
->rate
> txrate
->rate
)
788 if (IEEE80211_RATE_MODULATION(txrate
->flags
) !=
789 IEEE80211_RATE_MODULATION(r
->flags
))
792 if (r
->flags
& IEEE80211_RATE_BASIC
)
794 else if (r
->flags
& IEEE80211_RATE_MANDATORY
)
798 /* No matching basic rate found; use highest suitable mandatory
803 /* Time needed to transmit ACK
804 * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up
805 * to closest integer */
807 dur
= ieee80211_frame_duration(local
, 10, rate
, erp
,
808 local
->short_preamble
);
811 /* Frame is fragmented: duration increases with time needed to
812 * transmit next fragment plus ACK and 2 x SIFS. */
813 dur
*= 2; /* ACK + SIFS */
815 dur
+= ieee80211_frame_duration(local
, next_frag_len
,
817 local
->short_preamble
);
824 static ieee80211_txrx_result
825 ieee80211_tx_h_misc(struct ieee80211_txrx_data
*tx
)
827 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) tx
->skb
->data
;
829 struct ieee80211_tx_control
*control
= tx
->u
.tx
.control
;
830 struct ieee80211_hw_mode
*mode
= tx
->u
.tx
.mode
;
832 if (!is_multicast_ether_addr(hdr
->addr1
)) {
833 if (tx
->skb
->len
+ FCS_LEN
> tx
->local
->rts_threshold
&&
834 tx
->local
->rts_threshold
< IEEE80211_MAX_RTS_THRESHOLD
) {
835 control
->flags
|= IEEE80211_TXCTL_USE_RTS_CTS
;
836 control
->retry_limit
=
837 tx
->local
->long_retry_limit
;
839 control
->retry_limit
=
840 tx
->local
->short_retry_limit
;
843 control
->retry_limit
= 1;
846 if (tx
->fragmented
) {
847 /* Do not use multiple retry rates when sending fragmented
849 * TODO: The last fragment could still use multiple retry
851 control
->alt_retry_rate
= -1;
854 /* Use CTS protection for unicast frames sent using extended rates if
855 * there are associated non-ERP stations and RTS/CTS is not configured
857 if (mode
->mode
== MODE_IEEE80211G
&&
858 (tx
->u
.tx
.rate
->flags
& IEEE80211_RATE_ERP
) &&
860 tx
->local
->cts_protect_erp_frames
&&
861 !(control
->flags
& IEEE80211_TXCTL_USE_RTS_CTS
))
862 control
->flags
|= IEEE80211_TXCTL_USE_CTS_PROTECT
;
864 /* Setup duration field for the first fragment of the frame. Duration
865 * for remaining fragments will be updated when they are being sent
866 * to low-level driver in ieee80211_tx(). */
867 dur
= ieee80211_duration(tx
, is_multicast_ether_addr(hdr
->addr1
),
868 tx
->fragmented
? tx
->u
.tx
.extra_frag
[0]->len
:
870 hdr
->duration_id
= cpu_to_le16(dur
);
872 if ((control
->flags
& IEEE80211_TXCTL_USE_RTS_CTS
) ||
873 (control
->flags
& IEEE80211_TXCTL_USE_CTS_PROTECT
)) {
874 struct ieee80211_rate
*rate
;
876 /* Do not use multiple retry rates when using RTS/CTS */
877 control
->alt_retry_rate
= -1;
879 /* Use min(data rate, max base rate) as CTS/RTS rate */
880 rate
= tx
->u
.tx
.rate
;
881 while (rate
> mode
->rates
&&
882 !(rate
->flags
& IEEE80211_RATE_BASIC
))
885 control
->rts_cts_rate
= rate
->val
;
886 control
->rts_rate
= rate
;
890 tx
->sta
->tx_packets
++;
891 tx
->sta
->tx_fragments
++;
892 tx
->sta
->tx_bytes
+= tx
->skb
->len
;
893 if (tx
->u
.tx
.extra_frag
) {
895 tx
->sta
->tx_fragments
+= tx
->u
.tx
.num_extra_frag
;
896 for (i
= 0; i
< tx
->u
.tx
.num_extra_frag
; i
++) {
898 tx
->u
.tx
.extra_frag
[i
]->len
;
903 return TXRX_CONTINUE
;
907 static ieee80211_txrx_result
908 ieee80211_tx_h_check_assoc(struct ieee80211_txrx_data
*tx
)
910 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
911 struct sk_buff
*skb
= tx
->skb
;
912 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
913 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
916 if (unlikely(tx
->local
->sta_scanning
!= 0) &&
917 ((tx
->fc
& IEEE80211_FCTL_FTYPE
) != IEEE80211_FTYPE_MGMT
||
918 (tx
->fc
& IEEE80211_FCTL_STYPE
) != IEEE80211_STYPE_PROBE_REQ
))
921 if (tx
->u
.tx
.ps_buffered
)
922 return TXRX_CONTINUE
;
924 sta_flags
= tx
->sta
? tx
->sta
->flags
: 0;
926 if (likely(tx
->u
.tx
.unicast
)) {
927 if (unlikely(!(sta_flags
& WLAN_STA_ASSOC
) &&
928 tx
->sdata
->type
!= IEEE80211_IF_TYPE_IBSS
&&
929 (tx
->fc
& IEEE80211_FCTL_FTYPE
) == IEEE80211_FTYPE_DATA
)) {
930 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
931 printk(KERN_DEBUG
"%s: dropped data frame to not "
932 "associated station " MAC_FMT
"\n",
933 tx
->dev
->name
, MAC_ARG(hdr
->addr1
));
934 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
935 I802_DEBUG_INC(tx
->local
->tx_handlers_drop_not_assoc
);
939 if (unlikely((tx
->fc
& IEEE80211_FCTL_FTYPE
) == IEEE80211_FTYPE_DATA
&&
940 tx
->local
->num_sta
== 0 &&
941 !tx
->local
->allow_broadcast_always
&&
942 tx
->sdata
->type
!= IEEE80211_IF_TYPE_IBSS
)) {
944 * No associated STAs - no need to send multicast
949 return TXRX_CONTINUE
;
952 if (unlikely(!tx
->u
.tx
.mgmt_interface
&& tx
->sdata
->ieee802_1x
&&
953 !(sta_flags
& WLAN_STA_AUTHORIZED
))) {
954 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
955 printk(KERN_DEBUG
"%s: dropped frame to " MAC_FMT
956 " (unauthorized port)\n", tx
->dev
->name
,
957 MAC_ARG(hdr
->addr1
));
959 I802_DEBUG_INC(tx
->local
->tx_handlers_drop_unauth_port
);
963 return TXRX_CONTINUE
;
966 static ieee80211_txrx_result
967 ieee80211_tx_h_sequence(struct ieee80211_txrx_data
*tx
)
969 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)tx
->skb
->data
;
971 if (ieee80211_get_hdrlen(le16_to_cpu(hdr
->frame_control
)) >= 24)
972 ieee80211_include_sequence(tx
->sdata
, hdr
);
974 return TXRX_CONTINUE
;
977 /* This function is called whenever the AP is about to exceed the maximum limit
978 * of buffered frames for power saving STAs. This situation should not really
979 * happen often during normal operation, so dropping the oldest buffered packet
980 * from each queue should be OK to make some room for new frames. */
981 static void purge_old_ps_buffers(struct ieee80211_local
*local
)
983 int total
= 0, purged
= 0;
985 struct ieee80211_sub_if_data
*sdata
;
986 struct sta_info
*sta
;
988 read_lock(&local
->sub_if_lock
);
989 list_for_each_entry(sdata
, &local
->sub_if_list
, list
) {
990 struct ieee80211_if_ap
*ap
;
991 if (sdata
->dev
== local
->mdev
||
992 sdata
->type
!= IEEE80211_IF_TYPE_AP
)
995 skb
= skb_dequeue(&ap
->ps_bc_buf
);
1000 total
+= skb_queue_len(&ap
->ps_bc_buf
);
1002 read_unlock(&local
->sub_if_lock
);
1004 spin_lock_bh(&local
->sta_lock
);
1005 list_for_each_entry(sta
, &local
->sta_list
, list
) {
1006 skb
= skb_dequeue(&sta
->ps_tx_buf
);
1011 total
+= skb_queue_len(&sta
->ps_tx_buf
);
1013 spin_unlock_bh(&local
->sta_lock
);
1015 local
->total_ps_buffered
= total
;
1016 printk(KERN_DEBUG
"%s: PS buffers full - purged %d frames\n",
1017 local
->mdev
->name
, purged
);
1021 static inline ieee80211_txrx_result
1022 ieee80211_tx_h_multicast_ps_buf(struct ieee80211_txrx_data
*tx
)
1024 /* broadcast/multicast frame */
1025 /* If any of the associated stations is in power save mode,
1026 * the frame is buffered to be sent after DTIM beacon frame */
1027 if ((tx
->local
->hw
.flags
& IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING
) &&
1028 tx
->sdata
->type
!= IEEE80211_IF_TYPE_WDS
&&
1029 tx
->sdata
->bss
&& atomic_read(&tx
->sdata
->bss
->num_sta_ps
) &&
1030 !(tx
->fc
& IEEE80211_FCTL_ORDER
)) {
1031 if (tx
->local
->total_ps_buffered
>= TOTAL_MAX_TX_BUFFER
)
1032 purge_old_ps_buffers(tx
->local
);
1033 if (skb_queue_len(&tx
->sdata
->bss
->ps_bc_buf
) >=
1035 if (net_ratelimit()) {
1036 printk(KERN_DEBUG
"%s: BC TX buffer full - "
1037 "dropping the oldest frame\n",
1040 dev_kfree_skb(skb_dequeue(&tx
->sdata
->bss
->ps_bc_buf
));
1042 tx
->local
->total_ps_buffered
++;
1043 skb_queue_tail(&tx
->sdata
->bss
->ps_bc_buf
, tx
->skb
);
1047 return TXRX_CONTINUE
;
1051 static inline ieee80211_txrx_result
1052 ieee80211_tx_h_unicast_ps_buf(struct ieee80211_txrx_data
*tx
)
1054 struct sta_info
*sta
= tx
->sta
;
1056 if (unlikely(!sta
||
1057 ((tx
->fc
& IEEE80211_FCTL_FTYPE
) == IEEE80211_FTYPE_MGMT
&&
1058 (tx
->fc
& IEEE80211_FCTL_STYPE
) == IEEE80211_STYPE_PROBE_RESP
)))
1059 return TXRX_CONTINUE
;
1061 if (unlikely((sta
->flags
& WLAN_STA_PS
) && !sta
->pspoll
)) {
1062 struct ieee80211_tx_packet_data
*pkt_data
;
1063 #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
1064 printk(KERN_DEBUG
"STA " MAC_FMT
" aid %d: PS buffer (entries "
1066 MAC_ARG(sta
->addr
), sta
->aid
,
1067 skb_queue_len(&sta
->ps_tx_buf
));
1068 #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
1069 sta
->flags
|= WLAN_STA_TIM
;
1070 if (tx
->local
->total_ps_buffered
>= TOTAL_MAX_TX_BUFFER
)
1071 purge_old_ps_buffers(tx
->local
);
1072 if (skb_queue_len(&sta
->ps_tx_buf
) >= STA_MAX_TX_BUFFER
) {
1073 struct sk_buff
*old
= skb_dequeue(&sta
->ps_tx_buf
);
1074 if (net_ratelimit()) {
1075 printk(KERN_DEBUG
"%s: STA " MAC_FMT
" TX "
1076 "buffer full - dropping oldest frame\n",
1077 tx
->dev
->name
, MAC_ARG(sta
->addr
));
1081 tx
->local
->total_ps_buffered
++;
1082 /* Queue frame to be sent after STA sends an PS Poll frame */
1083 if (skb_queue_empty(&sta
->ps_tx_buf
)) {
1084 if (tx
->local
->ops
->set_tim
)
1085 tx
->local
->ops
->set_tim(local_to_hw(tx
->local
),
1088 bss_tim_set(tx
->local
, tx
->sdata
->bss
, sta
->aid
);
1090 pkt_data
= (struct ieee80211_tx_packet_data
*)tx
->skb
->cb
;
1091 pkt_data
->jiffies
= jiffies
;
1092 skb_queue_tail(&sta
->ps_tx_buf
, tx
->skb
);
1095 #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
1096 else if (unlikely(sta
->flags
& WLAN_STA_PS
)) {
1097 printk(KERN_DEBUG
"%s: STA " MAC_FMT
" in PS mode, but pspoll "
1098 "set -> send frame\n", tx
->dev
->name
,
1099 MAC_ARG(sta
->addr
));
1101 #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
1104 return TXRX_CONTINUE
;
1108 static ieee80211_txrx_result
1109 ieee80211_tx_h_ps_buf(struct ieee80211_txrx_data
*tx
)
1111 if (unlikely(tx
->u
.tx
.ps_buffered
))
1112 return TXRX_CONTINUE
;
1114 if (tx
->u
.tx
.unicast
)
1115 return ieee80211_tx_h_unicast_ps_buf(tx
);
1117 return ieee80211_tx_h_multicast_ps_buf(tx
);
1122 __ieee80211_tx_prepare(struct ieee80211_txrx_data
*tx
,
1123 struct sk_buff
*skb
,
1124 struct net_device
*dev
,
1125 struct ieee80211_tx_control
*control
)
1127 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
1128 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
1131 memset(tx
, 0, sizeof(*tx
));
1133 tx
->dev
= dev
; /* use original interface */
1135 tx
->sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1136 tx
->sta
= sta_info_get(local
, hdr
->addr1
);
1137 tx
->fc
= le16_to_cpu(hdr
->frame_control
);
1138 control
->power_level
= local
->hw
.conf
.power_level
;
1139 tx
->u
.tx
.control
= control
;
1140 tx
->u
.tx
.unicast
= !is_multicast_ether_addr(hdr
->addr1
);
1141 if (is_multicast_ether_addr(hdr
->addr1
))
1142 control
->flags
|= IEEE80211_TXCTL_NO_ACK
;
1144 control
->flags
&= ~IEEE80211_TXCTL_NO_ACK
;
1145 tx
->fragmented
= local
->fragmentation_threshold
<
1146 IEEE80211_MAX_FRAG_THRESHOLD
&& tx
->u
.tx
.unicast
&&
1147 skb
->len
+ FCS_LEN
> local
->fragmentation_threshold
&&
1148 (!local
->ops
->set_frag_threshold
);
1150 control
->flags
|= IEEE80211_TXCTL_CLEAR_DST_MASK
;
1151 else if (tx
->sta
->clear_dst_mask
) {
1152 control
->flags
|= IEEE80211_TXCTL_CLEAR_DST_MASK
;
1153 tx
->sta
->clear_dst_mask
= 0;
1155 control
->antenna_sel_tx
= local
->hw
.conf
.antenna_sel_tx
;
1156 if (local
->sta_antenna_sel
!= STA_ANTENNA_SEL_AUTO
&& tx
->sta
)
1157 control
->antenna_sel_tx
= tx
->sta
->antenna_sel_tx
;
1158 hdrlen
= ieee80211_get_hdrlen(tx
->fc
);
1159 if (skb
->len
> hdrlen
+ sizeof(rfc1042_header
) + 2) {
1160 u8
*pos
= &skb
->data
[hdrlen
+ sizeof(rfc1042_header
)];
1161 tx
->ethertype
= (pos
[0] << 8) | pos
[1];
1163 control
->flags
|= IEEE80211_TXCTL_FIRST_FRAGMENT
;
1167 static int inline is_ieee80211_device(struct net_device
*dev
,
1168 struct net_device
*master
)
1170 return (wdev_priv(dev
->ieee80211_ptr
) ==
1171 wdev_priv(master
->ieee80211_ptr
));
1174 /* Device in tx->dev has a reference added; use dev_put(tx->dev) when
1175 * finished with it. */
1176 static int inline ieee80211_tx_prepare(struct ieee80211_txrx_data
*tx
,
1177 struct sk_buff
*skb
,
1178 struct net_device
*mdev
,
1179 struct ieee80211_tx_control
*control
)
1181 struct ieee80211_tx_packet_data
*pkt_data
;
1182 struct net_device
*dev
;
1184 pkt_data
= (struct ieee80211_tx_packet_data
*)skb
->cb
;
1185 dev
= dev_get_by_index(pkt_data
->ifindex
);
1186 if (unlikely(dev
&& !is_ieee80211_device(dev
, mdev
))) {
1192 __ieee80211_tx_prepare(tx
, skb
, dev
, control
);
1196 static inline int __ieee80211_queue_stopped(const struct ieee80211_local
*local
,
1199 return test_bit(IEEE80211_LINK_STATE_XOFF
, &local
->state
[queue
]);
1202 static inline int __ieee80211_queue_pending(const struct ieee80211_local
*local
,
1205 return test_bit(IEEE80211_LINK_STATE_PENDING
, &local
->state
[queue
]);
1208 #define IEEE80211_TX_OK 0
1209 #define IEEE80211_TX_AGAIN 1
1210 #define IEEE80211_TX_FRAG_AGAIN 2
1212 static int __ieee80211_tx(struct ieee80211_local
*local
, struct sk_buff
*skb
,
1213 struct ieee80211_txrx_data
*tx
)
1215 struct ieee80211_tx_control
*control
= tx
->u
.tx
.control
;
1218 if (!ieee80211_qdisc_installed(local
->mdev
) &&
1219 __ieee80211_queue_stopped(local
, 0)) {
1220 netif_stop_queue(local
->mdev
);
1221 return IEEE80211_TX_AGAIN
;
1224 ieee80211_dump_frame(local
->mdev
->name
, "TX to low-level driver", skb
);
1225 ret
= local
->ops
->tx(local_to_hw(local
), skb
, control
);
1227 return IEEE80211_TX_AGAIN
;
1228 local
->mdev
->trans_start
= jiffies
;
1229 ieee80211_led_tx(local
, 1);
1231 if (tx
->u
.tx
.extra_frag
) {
1232 control
->flags
&= ~(IEEE80211_TXCTL_USE_RTS_CTS
|
1233 IEEE80211_TXCTL_USE_CTS_PROTECT
|
1234 IEEE80211_TXCTL_CLEAR_DST_MASK
|
1235 IEEE80211_TXCTL_FIRST_FRAGMENT
);
1236 for (i
= 0; i
< tx
->u
.tx
.num_extra_frag
; i
++) {
1237 if (!tx
->u
.tx
.extra_frag
[i
])
1239 if (__ieee80211_queue_stopped(local
, control
->queue
))
1240 return IEEE80211_TX_FRAG_AGAIN
;
1241 if (i
== tx
->u
.tx
.num_extra_frag
) {
1242 control
->tx_rate
= tx
->u
.tx
.last_frag_hwrate
;
1243 control
->rate
= tx
->u
.tx
.last_frag_rate
;
1244 if (tx
->u
.tx
.probe_last_frag
)
1246 IEEE80211_TXCTL_RATE_CTRL_PROBE
;
1249 ~IEEE80211_TXCTL_RATE_CTRL_PROBE
;
1252 ieee80211_dump_frame(local
->mdev
->name
,
1253 "TX to low-level driver",
1254 tx
->u
.tx
.extra_frag
[i
]);
1255 ret
= local
->ops
->tx(local_to_hw(local
),
1256 tx
->u
.tx
.extra_frag
[i
],
1259 return IEEE80211_TX_FRAG_AGAIN
;
1260 local
->mdev
->trans_start
= jiffies
;
1261 ieee80211_led_tx(local
, 1);
1262 tx
->u
.tx
.extra_frag
[i
] = NULL
;
1264 kfree(tx
->u
.tx
.extra_frag
);
1265 tx
->u
.tx
.extra_frag
= NULL
;
1267 return IEEE80211_TX_OK
;
1270 static int ieee80211_tx(struct net_device
*dev
, struct sk_buff
*skb
,
1271 struct ieee80211_tx_control
*control
, int mgmt
)
1273 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
1274 struct sta_info
*sta
;
1275 ieee80211_tx_handler
*handler
;
1276 struct ieee80211_txrx_data tx
;
1277 ieee80211_txrx_result res
= TXRX_DROP
;
1280 WARN_ON(__ieee80211_queue_pending(local
, control
->queue
));
1282 if (unlikely(skb
->len
< 10)) {
1287 __ieee80211_tx_prepare(&tx
, skb
, dev
, control
);
1289 tx
.u
.tx
.mgmt_interface
= mgmt
;
1290 tx
.u
.tx
.mode
= local
->hw
.conf
.mode
;
1292 for (handler
= local
->tx_handlers
; *handler
!= NULL
; handler
++) {
1293 res
= (*handler
)(&tx
);
1294 if (res
!= TXRX_CONTINUE
)
1298 skb
= tx
.skb
; /* handlers are allowed to change skb */
1303 if (unlikely(res
== TXRX_DROP
)) {
1304 I802_DEBUG_INC(local
->tx_handlers_drop
);
1308 if (unlikely(res
== TXRX_QUEUED
)) {
1309 I802_DEBUG_INC(local
->tx_handlers_queued
);
1313 if (tx
.u
.tx
.extra_frag
) {
1314 for (i
= 0; i
< tx
.u
.tx
.num_extra_frag
; i
++) {
1316 struct ieee80211_hdr
*hdr
=
1317 (struct ieee80211_hdr
*)
1318 tx
.u
.tx
.extra_frag
[i
]->data
;
1320 if (i
+ 1 < tx
.u
.tx
.num_extra_frag
) {
1321 next_len
= tx
.u
.tx
.extra_frag
[i
+ 1]->len
;
1324 tx
.u
.tx
.rate
= tx
.u
.tx
.last_frag_rate
;
1325 tx
.u
.tx
.last_frag_hwrate
= tx
.u
.tx
.rate
->val
;
1327 dur
= ieee80211_duration(&tx
, 0, next_len
);
1328 hdr
->duration_id
= cpu_to_le16(dur
);
1333 ret
= __ieee80211_tx(local
, skb
, &tx
);
1335 struct ieee80211_tx_stored_packet
*store
=
1336 &local
->pending_packet
[control
->queue
];
1338 if (ret
== IEEE80211_TX_FRAG_AGAIN
)
1340 set_bit(IEEE80211_LINK_STATE_PENDING
,
1341 &local
->state
[control
->queue
]);
1343 /* When the driver gets out of buffers during sending of
1344 * fragments and calls ieee80211_stop_queue, there is
1345 * a small window between IEEE80211_LINK_STATE_XOFF and
1346 * IEEE80211_LINK_STATE_PENDING flags are set. If a buffer
1347 * gets available in that window (i.e. driver calls
1348 * ieee80211_wake_queue), we would end up with ieee80211_tx
1349 * called with IEEE80211_LINK_STATE_PENDING. Prevent this by
1350 * continuing transmitting here when that situation is
1351 * possible to have happened. */
1352 if (!__ieee80211_queue_stopped(local
, control
->queue
)) {
1353 clear_bit(IEEE80211_LINK_STATE_PENDING
,
1354 &local
->state
[control
->queue
]);
1357 memcpy(&store
->control
, control
,
1358 sizeof(struct ieee80211_tx_control
));
1360 store
->extra_frag
= tx
.u
.tx
.extra_frag
;
1361 store
->num_extra_frag
= tx
.u
.tx
.num_extra_frag
;
1362 store
->last_frag_hwrate
= tx
.u
.tx
.last_frag_hwrate
;
1363 store
->last_frag_rate
= tx
.u
.tx
.last_frag_rate
;
1364 store
->last_frag_rate_ctrl_probe
= tx
.u
.tx
.probe_last_frag
;
1371 for (i
= 0; i
< tx
.u
.tx
.num_extra_frag
; i
++)
1372 if (tx
.u
.tx
.extra_frag
[i
])
1373 dev_kfree_skb(tx
.u
.tx
.extra_frag
[i
]);
1374 kfree(tx
.u
.tx
.extra_frag
);
1378 static void ieee80211_tx_pending(unsigned long data
)
1380 struct ieee80211_local
*local
= (struct ieee80211_local
*)data
;
1381 struct net_device
*dev
= local
->mdev
;
1382 struct ieee80211_tx_stored_packet
*store
;
1383 struct ieee80211_txrx_data tx
;
1384 int i
, ret
, reschedule
= 0;
1386 netif_tx_lock_bh(dev
);
1387 for (i
= 0; i
< local
->hw
.queues
; i
++) {
1388 if (__ieee80211_queue_stopped(local
, i
))
1390 if (!__ieee80211_queue_pending(local
, i
)) {
1394 store
= &local
->pending_packet
[i
];
1395 tx
.u
.tx
.control
= &store
->control
;
1396 tx
.u
.tx
.extra_frag
= store
->extra_frag
;
1397 tx
.u
.tx
.num_extra_frag
= store
->num_extra_frag
;
1398 tx
.u
.tx
.last_frag_hwrate
= store
->last_frag_hwrate
;
1399 tx
.u
.tx
.last_frag_rate
= store
->last_frag_rate
;
1400 tx
.u
.tx
.probe_last_frag
= store
->last_frag_rate_ctrl_probe
;
1401 ret
= __ieee80211_tx(local
, store
->skb
, &tx
);
1403 if (ret
== IEEE80211_TX_FRAG_AGAIN
)
1406 clear_bit(IEEE80211_LINK_STATE_PENDING
,
1411 netif_tx_unlock_bh(dev
);
1413 if (!ieee80211_qdisc_installed(dev
)) {
1414 if (!__ieee80211_queue_stopped(local
, 0))
1415 netif_wake_queue(dev
);
1417 netif_schedule(dev
);
1421 static void ieee80211_clear_tx_pending(struct ieee80211_local
*local
)
1424 struct ieee80211_tx_stored_packet
*store
;
1426 for (i
= 0; i
< local
->hw
.queues
; i
++) {
1427 if (!__ieee80211_queue_pending(local
, i
))
1429 store
= &local
->pending_packet
[i
];
1430 kfree_skb(store
->skb
);
1431 for (j
= 0; j
< store
->num_extra_frag
; j
++)
1432 kfree_skb(store
->extra_frag
[j
]);
1433 kfree(store
->extra_frag
);
1434 clear_bit(IEEE80211_LINK_STATE_PENDING
, &local
->state
[i
]);
1438 static int ieee80211_master_start_xmit(struct sk_buff
*skb
,
1439 struct net_device
*dev
)
1441 struct ieee80211_tx_control control
;
1442 struct ieee80211_tx_packet_data
*pkt_data
;
1443 struct net_device
*odev
= NULL
;
1444 struct ieee80211_sub_if_data
*osdata
;
1449 * copy control out of the skb so other people can use skb->cb
1451 pkt_data
= (struct ieee80211_tx_packet_data
*)skb
->cb
;
1452 memset(&control
, 0, sizeof(struct ieee80211_tx_control
));
1454 if (pkt_data
->ifindex
)
1455 odev
= dev_get_by_index(pkt_data
->ifindex
);
1456 if (unlikely(odev
&& !is_ieee80211_device(odev
, dev
))) {
1460 if (unlikely(!odev
)) {
1461 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1462 printk(KERN_DEBUG
"%s: Discarded packet with nonexistent "
1463 "originating device\n", dev
->name
);
1468 osdata
= IEEE80211_DEV_TO_SUB_IF(odev
);
1470 headroom
= osdata
->local
->hw
.extra_tx_headroom
+
1471 IEEE80211_ENCRYPT_HEADROOM
;
1472 if (skb_headroom(skb
) < headroom
) {
1473 if (pskb_expand_head(skb
, headroom
, 0, GFP_ATOMIC
)) {
1479 control
.ifindex
= odev
->ifindex
;
1480 control
.type
= osdata
->type
;
1481 if (pkt_data
->req_tx_status
)
1482 control
.flags
|= IEEE80211_TXCTL_REQ_TX_STATUS
;
1483 if (pkt_data
->do_not_encrypt
)
1484 control
.flags
|= IEEE80211_TXCTL_DO_NOT_ENCRYPT
;
1485 if (pkt_data
->requeue
)
1486 control
.flags
|= IEEE80211_TXCTL_REQUEUE
;
1487 control
.queue
= pkt_data
->queue
;
1489 ret
= ieee80211_tx(odev
, skb
, &control
,
1490 control
.type
== IEEE80211_IF_TYPE_MGMT
);
1498 * ieee80211_subif_start_xmit - netif start_xmit function for Ethernet-type
1499 * subinterfaces (wlan#, WDS, and VLAN interfaces)
1500 * @skb: packet to be sent
1501 * @dev: incoming interface
1503 * Returns: 0 on success (and frees skb in this case) or 1 on failure (skb will
1504 * not be freed, and caller is responsible for either retrying later or freeing
1507 * This function takes in an Ethernet header and encapsulates it with suitable
1508 * IEEE 802.11 header based on which interface the packet is coming in. The
1509 * encapsulated packet will then be passed to master interface, wlan#.11, for
1510 * transmission (through low-level driver).
1512 static int ieee80211_subif_start_xmit(struct sk_buff
*skb
,
1513 struct net_device
*dev
)
1515 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
1516 struct ieee80211_tx_packet_data
*pkt_data
;
1517 struct ieee80211_sub_if_data
*sdata
;
1518 int ret
= 1, head_need
;
1519 u16 ethertype
, hdrlen
, fc
;
1520 struct ieee80211_hdr hdr
;
1521 const u8
*encaps_data
;
1522 int encaps_len
, skip_header_bytes
;
1523 int nh_pos
, h_pos
, no_encrypt
= 0;
1524 struct sta_info
*sta
;
1526 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1527 if (unlikely(skb
->len
< ETH_HLEN
)) {
1528 printk(KERN_DEBUG
"%s: short skb (len=%d)\n",
1529 dev
->name
, skb
->len
);
1534 nh_pos
= skb_network_header(skb
) - skb
->data
;
1535 h_pos
= skb_transport_header(skb
) - skb
->data
;
1537 /* convert Ethernet header to proper 802.11 header (based on
1538 * operation mode) */
1539 ethertype
= (skb
->data
[12] << 8) | skb
->data
[13];
1540 /* TODO: handling for 802.1x authorized/unauthorized port */
1541 fc
= IEEE80211_FTYPE_DATA
| IEEE80211_STYPE_DATA
;
1543 if (likely(sdata
->type
== IEEE80211_IF_TYPE_AP
||
1544 sdata
->type
== IEEE80211_IF_TYPE_VLAN
)) {
1545 fc
|= IEEE80211_FCTL_FROMDS
;
1547 memcpy(hdr
.addr1
, skb
->data
, ETH_ALEN
);
1548 memcpy(hdr
.addr2
, dev
->dev_addr
, ETH_ALEN
);
1549 memcpy(hdr
.addr3
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
1551 } else if (sdata
->type
== IEEE80211_IF_TYPE_WDS
) {
1552 fc
|= IEEE80211_FCTL_FROMDS
| IEEE80211_FCTL_TODS
;
1554 memcpy(hdr
.addr1
, sdata
->u
.wds
.remote_addr
, ETH_ALEN
);
1555 memcpy(hdr
.addr2
, dev
->dev_addr
, ETH_ALEN
);
1556 memcpy(hdr
.addr3
, skb
->data
, ETH_ALEN
);
1557 memcpy(hdr
.addr4
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
1559 } else if (sdata
->type
== IEEE80211_IF_TYPE_STA
) {
1560 fc
|= IEEE80211_FCTL_TODS
;
1562 memcpy(hdr
.addr1
, sdata
->u
.sta
.bssid
, ETH_ALEN
);
1563 memcpy(hdr
.addr2
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
1564 memcpy(hdr
.addr3
, skb
->data
, ETH_ALEN
);
1566 } else if (sdata
->type
== IEEE80211_IF_TYPE_IBSS
) {
1568 memcpy(hdr
.addr1
, skb
->data
, ETH_ALEN
);
1569 memcpy(hdr
.addr2
, skb
->data
+ ETH_ALEN
, ETH_ALEN
);
1570 memcpy(hdr
.addr3
, sdata
->u
.sta
.bssid
, ETH_ALEN
);
1577 /* receiver is QoS enabled, use a QoS type frame */
1578 sta
= sta_info_get(local
, hdr
.addr1
);
1580 if (sta
->flags
& WLAN_STA_WME
) {
1581 fc
|= IEEE80211_STYPE_QOS_DATA
;
1587 hdr
.frame_control
= cpu_to_le16(fc
);
1588 hdr
.duration_id
= 0;
1591 skip_header_bytes
= ETH_HLEN
;
1592 if (ethertype
== ETH_P_AARP
|| ethertype
== ETH_P_IPX
) {
1593 encaps_data
= bridge_tunnel_header
;
1594 encaps_len
= sizeof(bridge_tunnel_header
);
1595 skip_header_bytes
-= 2;
1596 } else if (ethertype
>= 0x600) {
1597 encaps_data
= rfc1042_header
;
1598 encaps_len
= sizeof(rfc1042_header
);
1599 skip_header_bytes
-= 2;
1605 skb_pull(skb
, skip_header_bytes
);
1606 nh_pos
-= skip_header_bytes
;
1607 h_pos
-= skip_header_bytes
;
1609 /* TODO: implement support for fragments so that there is no need to
1610 * reallocate and copy payload; it might be enough to support one
1611 * extra fragment that would be copied in the beginning of the frame
1612 * data.. anyway, it would be nice to include this into skb structure
1615 * There are few options for this:
1616 * use skb->cb as an extra space for 802.11 header
1617 * allocate new buffer if not enough headroom
1618 * make sure that there is enough headroom in every skb by increasing
1619 * build in headroom in __dev_alloc_skb() (linux/skbuff.h) and
1620 * alloc_skb() (net/core/skbuff.c)
1622 head_need
= hdrlen
+ encaps_len
+ local
->hw
.extra_tx_headroom
;
1623 head_need
-= skb_headroom(skb
);
1625 /* We are going to modify skb data, so make a copy of it if happens to
1626 * be cloned. This could happen, e.g., with Linux bridge code passing
1627 * us broadcast frames. */
1629 if (head_need
> 0 || skb_cloned(skb
)) {
1631 printk(KERN_DEBUG
"%s: need to reallocate buffer for %d bytes "
1632 "of headroom\n", dev
->name
, head_need
);
1635 if (skb_cloned(skb
))
1636 I802_DEBUG_INC(local
->tx_expand_skb_head_cloned
);
1638 I802_DEBUG_INC(local
->tx_expand_skb_head
);
1639 /* Since we have to reallocate the buffer, make sure that there
1640 * is enough room for possible WEP IV/ICV and TKIP (8 bytes
1641 * before payload and 12 after). */
1642 if (pskb_expand_head(skb
, (head_need
> 0 ? head_need
+ 8 : 8),
1644 printk(KERN_DEBUG
"%s: failed to reallocate TX buffer"
1651 memcpy(skb_push(skb
, encaps_len
), encaps_data
, encaps_len
);
1652 nh_pos
+= encaps_len
;
1653 h_pos
+= encaps_len
;
1655 memcpy(skb_push(skb
, hdrlen
), &hdr
, hdrlen
);
1659 pkt_data
= (struct ieee80211_tx_packet_data
*)skb
->cb
;
1660 memset(pkt_data
, 0, sizeof(struct ieee80211_tx_packet_data
));
1661 pkt_data
->ifindex
= sdata
->dev
->ifindex
;
1662 pkt_data
->mgmt_iface
= (sdata
->type
== IEEE80211_IF_TYPE_MGMT
);
1663 pkt_data
->do_not_encrypt
= no_encrypt
;
1665 skb
->dev
= local
->mdev
;
1666 sdata
->stats
.tx_packets
++;
1667 sdata
->stats
.tx_bytes
+= skb
->len
;
1669 /* Update skb pointers to various headers since this modified frame
1670 * is going to go through Linux networking code that may potentially
1671 * need things like pointer to IP header. */
1672 skb_set_mac_header(skb
, 0);
1673 skb_set_network_header(skb
, nh_pos
);
1674 skb_set_transport_header(skb
, h_pos
);
1676 dev
->trans_start
= jiffies
;
1677 dev_queue_xmit(skb
);
1690 * This is the transmit routine for the 802.11 type interfaces
1691 * called by upper layers of the linux networking
1692 * stack when it has a frame to transmit
1695 ieee80211_mgmt_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
1697 struct ieee80211_sub_if_data
*sdata
;
1698 struct ieee80211_tx_packet_data
*pkt_data
;
1699 struct ieee80211_hdr
*hdr
;
1702 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1704 if (skb
->len
< 10) {
1709 if (skb_headroom(skb
) < sdata
->local
->hw
.extra_tx_headroom
) {
1710 if (pskb_expand_head(skb
,
1711 sdata
->local
->hw
.extra_tx_headroom
, 0, GFP_ATOMIC
)) {
1717 hdr
= (struct ieee80211_hdr
*) skb
->data
;
1718 fc
= le16_to_cpu(hdr
->frame_control
);
1720 pkt_data
= (struct ieee80211_tx_packet_data
*) skb
->cb
;
1721 memset(pkt_data
, 0, sizeof(struct ieee80211_tx_packet_data
));
1722 pkt_data
->ifindex
= sdata
->dev
->ifindex
;
1723 pkt_data
->mgmt_iface
= (sdata
->type
== IEEE80211_IF_TYPE_MGMT
);
1725 skb
->priority
= 20; /* use hardcoded priority for mgmt TX queue */
1726 skb
->dev
= sdata
->local
->mdev
;
1729 * We're using the protocol field of the the frame control header
1730 * to request TX callback for hostapd. BIT(1) is checked.
1732 if ((fc
& BIT(1)) == BIT(1)) {
1733 pkt_data
->req_tx_status
= 1;
1735 hdr
->frame_control
= cpu_to_le16(fc
);
1738 pkt_data
->do_not_encrypt
= !(fc
& IEEE80211_FCTL_PROTECTED
);
1740 sdata
->stats
.tx_packets
++;
1741 sdata
->stats
.tx_bytes
+= skb
->len
;
1743 dev_queue_xmit(skb
);
1749 static void ieee80211_beacon_add_tim(struct ieee80211_local
*local
,
1750 struct ieee80211_if_ap
*bss
,
1751 struct sk_buff
*skb
)
1755 int i
, have_bits
= 0, n1
, n2
;
1757 /* Generate bitmap for TIM only if there are any STAs in power save
1759 spin_lock_bh(&local
->sta_lock
);
1760 if (atomic_read(&bss
->num_sta_ps
) > 0)
1761 /* in the hope that this is faster than
1762 * checking byte-for-byte */
1763 have_bits
= !bitmap_empty((unsigned long*)bss
->tim
,
1764 IEEE80211_MAX_AID
+1);
1766 if (bss
->dtim_count
== 0)
1767 bss
->dtim_count
= bss
->dtim_period
- 1;
1771 tim
= pos
= (u8
*) skb_put(skb
, 6);
1772 *pos
++ = WLAN_EID_TIM
;
1774 *pos
++ = bss
->dtim_count
;
1775 *pos
++ = bss
->dtim_period
;
1777 if (bss
->dtim_count
== 0 && !skb_queue_empty(&bss
->ps_bc_buf
))
1781 /* Find largest even number N1 so that bits numbered 1 through
1782 * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits
1783 * (N2 + 1) x 8 through 2007 are 0. */
1785 for (i
= 0; i
< IEEE80211_MAX_TIM_LEN
; i
++) {
1792 for (i
= IEEE80211_MAX_TIM_LEN
- 1; i
>= n1
; i
--) {
1799 /* Bitmap control */
1801 /* Part Virt Bitmap */
1802 memcpy(pos
, bss
->tim
+ n1
, n2
- n1
+ 1);
1804 tim
[1] = n2
- n1
+ 4;
1805 skb_put(skb
, n2
- n1
);
1807 *pos
++ = aid0
; /* Bitmap control */
1808 *pos
++ = 0; /* Part Virt Bitmap */
1810 spin_unlock_bh(&local
->sta_lock
);
1814 struct sk_buff
* ieee80211_beacon_get(struct ieee80211_hw
*hw
, int if_id
,
1815 struct ieee80211_tx_control
*control
)
1817 struct ieee80211_local
*local
= hw_to_local(hw
);
1818 struct sk_buff
*skb
;
1819 struct net_device
*bdev
;
1820 struct ieee80211_sub_if_data
*sdata
= NULL
;
1821 struct ieee80211_if_ap
*ap
= NULL
;
1822 struct ieee80211_rate
*rate
;
1823 struct rate_control_extra extra
;
1824 u8
*b_head
, *b_tail
;
1827 bdev
= dev_get_by_index(if_id
);
1829 sdata
= IEEE80211_DEV_TO_SUB_IF(bdev
);
1834 if (!ap
|| sdata
->type
!= IEEE80211_IF_TYPE_AP
||
1836 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1837 if (net_ratelimit())
1838 printk(KERN_DEBUG
"no beacon data avail for idx=%d "
1839 "(%s)\n", if_id
, bdev
? bdev
->name
: "N/A");
1840 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
1844 /* Assume we are generating the normal beacon locally */
1845 b_head
= ap
->beacon_head
;
1846 b_tail
= ap
->beacon_tail
;
1847 bh_len
= ap
->beacon_head_len
;
1848 bt_len
= ap
->beacon_tail_len
;
1850 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+
1851 bh_len
+ bt_len
+ 256 /* maximum TIM len */);
1855 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
1856 memcpy(skb_put(skb
, bh_len
), b_head
, bh_len
);
1858 ieee80211_include_sequence(sdata
, (struct ieee80211_hdr
*)skb
->data
);
1860 ieee80211_beacon_add_tim(local
, ap
, skb
);
1863 memcpy(skb_put(skb
, bt_len
), b_tail
, bt_len
);
1867 memset(&extra
, 0, sizeof(extra
));
1868 extra
.mode
= local
->oper_hw_mode
;
1870 rate
= rate_control_get_rate(local
, local
->mdev
, skb
, &extra
);
1872 if (net_ratelimit()) {
1873 printk(KERN_DEBUG
"%s: ieee80211_beacon_get: no rate "
1874 "found\n", local
->mdev
->name
);
1880 control
->tx_rate
= (local
->short_preamble
&&
1881 (rate
->flags
& IEEE80211_RATE_PREAMBLE2
)) ?
1882 rate
->val2
: rate
->val
;
1883 control
->antenna_sel_tx
= local
->hw
.conf
.antenna_sel_tx
;
1884 control
->power_level
= local
->hw
.conf
.power_level
;
1885 control
->flags
|= IEEE80211_TXCTL_NO_ACK
;
1886 control
->retry_limit
= 1;
1887 control
->flags
|= IEEE80211_TXCTL_CLEAR_DST_MASK
;
1893 EXPORT_SYMBOL(ieee80211_beacon_get
);
1895 __le16
ieee80211_rts_duration(struct ieee80211_hw
*hw
,
1897 const struct ieee80211_tx_control
*frame_txctl
)
1899 struct ieee80211_local
*local
= hw_to_local(hw
);
1900 struct ieee80211_rate
*rate
;
1901 int short_preamble
= local
->short_preamble
;
1905 rate
= frame_txctl
->rts_rate
;
1906 erp
= !!(rate
->flags
& IEEE80211_RATE_ERP
);
1909 dur
= ieee80211_frame_duration(local
, 10, rate
->rate
,
1910 erp
, short_preamble
);
1911 /* Data frame duration */
1912 dur
+= ieee80211_frame_duration(local
, frame_len
, rate
->rate
,
1913 erp
, short_preamble
);
1915 dur
+= ieee80211_frame_duration(local
, 10, rate
->rate
,
1916 erp
, short_preamble
);
1918 return cpu_to_le16(dur
);
1920 EXPORT_SYMBOL(ieee80211_rts_duration
);
1923 __le16
ieee80211_ctstoself_duration(struct ieee80211_hw
*hw
,
1925 const struct ieee80211_tx_control
*frame_txctl
)
1927 struct ieee80211_local
*local
= hw_to_local(hw
);
1928 struct ieee80211_rate
*rate
;
1929 int short_preamble
= local
->short_preamble
;
1933 rate
= frame_txctl
->rts_rate
;
1934 erp
= !!(rate
->flags
& IEEE80211_RATE_ERP
);
1936 /* Data frame duration */
1937 dur
= ieee80211_frame_duration(local
, frame_len
, rate
->rate
,
1938 erp
, short_preamble
);
1939 if (!(frame_txctl
->flags
& IEEE80211_TXCTL_NO_ACK
)) {
1941 dur
+= ieee80211_frame_duration(local
, 10, rate
->rate
,
1942 erp
, short_preamble
);
1945 return cpu_to_le16(dur
);
1947 EXPORT_SYMBOL(ieee80211_ctstoself_duration
);
1949 void ieee80211_rts_get(struct ieee80211_hw
*hw
,
1950 const void *frame
, size_t frame_len
,
1951 const struct ieee80211_tx_control
*frame_txctl
,
1952 struct ieee80211_rts
*rts
)
1954 const struct ieee80211_hdr
*hdr
= frame
;
1957 fctl
= IEEE80211_FTYPE_CTL
| IEEE80211_STYPE_RTS
;
1958 rts
->frame_control
= cpu_to_le16(fctl
);
1959 rts
->duration
= ieee80211_rts_duration(hw
, frame_len
, frame_txctl
);
1960 memcpy(rts
->ra
, hdr
->addr1
, sizeof(rts
->ra
));
1961 memcpy(rts
->ta
, hdr
->addr2
, sizeof(rts
->ta
));
1963 EXPORT_SYMBOL(ieee80211_rts_get
);
1965 void ieee80211_ctstoself_get(struct ieee80211_hw
*hw
,
1966 const void *frame
, size_t frame_len
,
1967 const struct ieee80211_tx_control
*frame_txctl
,
1968 struct ieee80211_cts
*cts
)
1970 const struct ieee80211_hdr
*hdr
= frame
;
1973 fctl
= IEEE80211_FTYPE_CTL
| IEEE80211_STYPE_CTS
;
1974 cts
->frame_control
= cpu_to_le16(fctl
);
1975 cts
->duration
= ieee80211_ctstoself_duration(hw
, frame_len
, frame_txctl
);
1976 memcpy(cts
->ra
, hdr
->addr1
, sizeof(cts
->ra
));
1978 EXPORT_SYMBOL(ieee80211_ctstoself_get
);
1981 ieee80211_get_buffered_bc(struct ieee80211_hw
*hw
, int if_id
,
1982 struct ieee80211_tx_control
*control
)
1984 struct ieee80211_local
*local
= hw_to_local(hw
);
1985 struct sk_buff
*skb
;
1986 struct sta_info
*sta
;
1987 ieee80211_tx_handler
*handler
;
1988 struct ieee80211_txrx_data tx
;
1989 ieee80211_txrx_result res
= TXRX_DROP
;
1990 struct net_device
*bdev
;
1991 struct ieee80211_sub_if_data
*sdata
;
1992 struct ieee80211_if_ap
*bss
= NULL
;
1994 bdev
= dev_get_by_index(if_id
);
1996 sdata
= IEEE80211_DEV_TO_SUB_IF(bdev
);
2000 if (!bss
|| sdata
->type
!= IEEE80211_IF_TYPE_AP
|| !bss
->beacon_head
)
2003 if (bss
->dtim_count
!= 0)
2004 return NULL
; /* send buffered bc/mc only after DTIM beacon */
2005 memset(control
, 0, sizeof(*control
));
2007 skb
= skb_dequeue(&bss
->ps_bc_buf
);
2010 local
->total_ps_buffered
--;
2012 if (!skb_queue_empty(&bss
->ps_bc_buf
) && skb
->len
>= 2) {
2013 struct ieee80211_hdr
*hdr
=
2014 (struct ieee80211_hdr
*) skb
->data
;
2015 /* more buffered multicast/broadcast frames ==> set
2016 * MoreData flag in IEEE 802.11 header to inform PS
2018 hdr
->frame_control
|=
2019 cpu_to_le16(IEEE80211_FCTL_MOREDATA
);
2022 if (ieee80211_tx_prepare(&tx
, skb
, local
->mdev
, control
) == 0)
2024 dev_kfree_skb_any(skb
);
2027 tx
.u
.tx
.ps_buffered
= 1;
2029 for (handler
= local
->tx_handlers
; *handler
!= NULL
; handler
++) {
2030 res
= (*handler
)(&tx
);
2031 if (res
== TXRX_DROP
|| res
== TXRX_QUEUED
)
2035 skb
= tx
.skb
; /* handlers are allowed to change skb */
2037 if (res
== TXRX_DROP
) {
2038 I802_DEBUG_INC(local
->tx_handlers_drop
);
2041 } else if (res
== TXRX_QUEUED
) {
2042 I802_DEBUG_INC(local
->tx_handlers_queued
);
2051 EXPORT_SYMBOL(ieee80211_get_buffered_bc
);
2053 static int __ieee80211_if_config(struct net_device
*dev
,
2054 struct sk_buff
*beacon
,
2055 struct ieee80211_tx_control
*control
)
2057 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
2058 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
2059 struct ieee80211_if_conf conf
;
2060 static u8 scan_bssid
[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
2062 if (!local
->ops
->config_interface
|| !netif_running(dev
))
2065 memset(&conf
, 0, sizeof(conf
));
2066 conf
.type
= sdata
->type
;
2067 if (sdata
->type
== IEEE80211_IF_TYPE_STA
||
2068 sdata
->type
== IEEE80211_IF_TYPE_IBSS
) {
2069 if (local
->sta_scanning
&&
2070 local
->scan_dev
== dev
)
2071 conf
.bssid
= scan_bssid
;
2073 conf
.bssid
= sdata
->u
.sta
.bssid
;
2074 conf
.ssid
= sdata
->u
.sta
.ssid
;
2075 conf
.ssid_len
= sdata
->u
.sta
.ssid_len
;
2076 conf
.generic_elem
= sdata
->u
.sta
.extra_ie
;
2077 conf
.generic_elem_len
= sdata
->u
.sta
.extra_ie_len
;
2078 } else if (sdata
->type
== IEEE80211_IF_TYPE_AP
) {
2079 conf
.ssid
= sdata
->u
.ap
.ssid
;
2080 conf
.ssid_len
= sdata
->u
.ap
.ssid_len
;
2081 conf
.generic_elem
= sdata
->u
.ap
.generic_elem
;
2082 conf
.generic_elem_len
= sdata
->u
.ap
.generic_elem_len
;
2083 conf
.beacon
= beacon
;
2084 conf
.beacon_control
= control
;
2086 return local
->ops
->config_interface(local_to_hw(local
),
2087 dev
->ifindex
, &conf
);
2090 int ieee80211_if_config(struct net_device
*dev
)
2092 return __ieee80211_if_config(dev
, NULL
, NULL
);
2095 int ieee80211_if_config_beacon(struct net_device
*dev
)
2097 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
2098 struct ieee80211_tx_control control
;
2099 struct sk_buff
*skb
;
2101 if (!(local
->hw
.flags
& IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE
))
2103 skb
= ieee80211_beacon_get(local_to_hw(local
), dev
->ifindex
, &control
);
2106 return __ieee80211_if_config(dev
, skb
, &control
);
2109 int ieee80211_hw_config(struct ieee80211_local
*local
)
2111 struct ieee80211_hw_mode
*mode
;
2112 struct ieee80211_channel
*chan
;
2115 if (local
->sta_scanning
) {
2116 chan
= local
->scan_channel
;
2117 mode
= local
->scan_hw_mode
;
2119 chan
= local
->oper_channel
;
2120 mode
= local
->oper_hw_mode
;
2123 local
->hw
.conf
.channel
= chan
->chan
;
2124 local
->hw
.conf
.channel_val
= chan
->val
;
2125 local
->hw
.conf
.power_level
= chan
->power_level
;
2126 local
->hw
.conf
.freq
= chan
->freq
;
2127 local
->hw
.conf
.phymode
= mode
->mode
;
2128 local
->hw
.conf
.antenna_max
= chan
->antenna_max
;
2129 local
->hw
.conf
.chan
= chan
;
2130 local
->hw
.conf
.mode
= mode
;
2132 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2133 printk(KERN_DEBUG
"HW CONFIG: channel=%d freq=%d "
2134 "phymode=%d\n", local
->hw
.conf
.channel
, local
->hw
.conf
.freq
,
2135 local
->hw
.conf
.phymode
);
2136 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
2138 if (local
->ops
->config
)
2139 ret
= local
->ops
->config(local_to_hw(local
), &local
->hw
.conf
);
2145 static int ieee80211_change_mtu(struct net_device
*dev
, int new_mtu
)
2147 /* FIX: what would be proper limits for MTU?
2148 * This interface uses 802.3 frames. */
2149 if (new_mtu
< 256 || new_mtu
> IEEE80211_MAX_DATA_LEN
- 24 - 6) {
2150 printk(KERN_WARNING
"%s: invalid MTU %d\n",
2151 dev
->name
, new_mtu
);
2155 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2156 printk(KERN_DEBUG
"%s: setting MTU %d\n", dev
->name
, new_mtu
);
2157 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
2163 static int ieee80211_change_mtu_apdev(struct net_device
*dev
, int new_mtu
)
2165 /* FIX: what would be proper limits for MTU?
2166 * This interface uses 802.11 frames. */
2167 if (new_mtu
< 256 || new_mtu
> IEEE80211_MAX_DATA_LEN
) {
2168 printk(KERN_WARNING
"%s: invalid MTU %d\n",
2169 dev
->name
, new_mtu
);
2173 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2174 printk(KERN_DEBUG
"%s: setting MTU %d\n", dev
->name
, new_mtu
);
2175 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
2180 enum netif_tx_lock_class
{
2185 static inline void netif_tx_lock_nested(struct net_device
*dev
, int subclass
)
2187 spin_lock_nested(&dev
->_xmit_lock
, subclass
);
2188 dev
->xmit_lock_owner
= smp_processor_id();
2191 static void ieee80211_set_multicast_list(struct net_device
*dev
)
2193 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
2194 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
2195 unsigned short flags
;
2197 netif_tx_lock_nested(local
->mdev
, TX_LOCK_MASTER
);
2198 if (((dev
->flags
& IFF_ALLMULTI
) != 0) ^ (sdata
->allmulti
!= 0)) {
2199 if (sdata
->allmulti
) {
2200 sdata
->allmulti
= 0;
2201 local
->iff_allmultis
--;
2203 sdata
->allmulti
= 1;
2204 local
->iff_allmultis
++;
2207 if (((dev
->flags
& IFF_PROMISC
) != 0) ^ (sdata
->promisc
!= 0)) {
2208 if (sdata
->promisc
) {
2210 local
->iff_promiscs
--;
2213 local
->iff_promiscs
++;
2216 if (dev
->mc_count
!= sdata
->mc_count
) {
2217 local
->mc_count
= local
->mc_count
- sdata
->mc_count
+
2219 sdata
->mc_count
= dev
->mc_count
;
2221 if (local
->ops
->set_multicast_list
) {
2222 flags
= local
->mdev
->flags
;
2223 if (local
->iff_allmultis
)
2224 flags
|= IFF_ALLMULTI
;
2225 if (local
->iff_promiscs
)
2226 flags
|= IFF_PROMISC
;
2227 read_lock(&local
->sub_if_lock
);
2228 local
->ops
->set_multicast_list(local_to_hw(local
), flags
,
2230 read_unlock(&local
->sub_if_lock
);
2232 netif_tx_unlock(local
->mdev
);
2235 struct dev_mc_list
*ieee80211_get_mc_list_item(struct ieee80211_hw
*hw
,
2236 struct dev_mc_list
*prev
,
2239 struct ieee80211_local
*local
= hw_to_local(hw
);
2240 struct ieee80211_sub_if_data
*sdata
= *ptr
;
2241 struct dev_mc_list
*mc
;
2247 if (!prev
|| !prev
->next
) {
2249 sdata
= list_entry(sdata
->list
.next
,
2250 struct ieee80211_sub_if_data
, list
);
2252 sdata
= list_entry(local
->sub_if_list
.next
,
2253 struct ieee80211_sub_if_data
, list
);
2254 if (&sdata
->list
!= &local
->sub_if_list
)
2255 mc
= sdata
->dev
->mc_list
;
2264 EXPORT_SYMBOL(ieee80211_get_mc_list_item
);
2266 static struct net_device_stats
*ieee80211_get_stats(struct net_device
*dev
)
2268 struct ieee80211_sub_if_data
*sdata
;
2269 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
2270 return &(sdata
->stats
);
2273 static void ieee80211_if_shutdown(struct net_device
*dev
)
2275 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
2276 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
2279 switch (sdata
->type
) {
2280 case IEEE80211_IF_TYPE_STA
:
2281 case IEEE80211_IF_TYPE_IBSS
:
2282 sdata
->u
.sta
.state
= IEEE80211_DISABLED
;
2283 del_timer_sync(&sdata
->u
.sta
.timer
);
2284 skb_queue_purge(&sdata
->u
.sta
.skb_queue
);
2285 if (!local
->ops
->hw_scan
&&
2286 local
->scan_dev
== sdata
->dev
) {
2287 local
->sta_scanning
= 0;
2288 cancel_delayed_work(&local
->scan_work
);
2290 flush_workqueue(local
->hw
.workqueue
);
2295 static inline int identical_mac_addr_allowed(int type1
, int type2
)
2297 return (type1
== IEEE80211_IF_TYPE_MNTR
||
2298 type2
== IEEE80211_IF_TYPE_MNTR
||
2299 (type1
== IEEE80211_IF_TYPE_AP
&&
2300 type2
== IEEE80211_IF_TYPE_WDS
) ||
2301 (type1
== IEEE80211_IF_TYPE_WDS
&&
2302 (type2
== IEEE80211_IF_TYPE_WDS
||
2303 type2
== IEEE80211_IF_TYPE_AP
)) ||
2304 (type1
== IEEE80211_IF_TYPE_AP
&&
2305 type2
== IEEE80211_IF_TYPE_VLAN
) ||
2306 (type1
== IEEE80211_IF_TYPE_VLAN
&&
2307 (type2
== IEEE80211_IF_TYPE_AP
||
2308 type2
== IEEE80211_IF_TYPE_VLAN
)));
2311 static int ieee80211_master_open(struct net_device
*dev
)
2313 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
2314 struct ieee80211_sub_if_data
*sdata
;
2315 int res
= -EOPNOTSUPP
;
2317 read_lock(&local
->sub_if_lock
);
2318 list_for_each_entry(sdata
, &local
->sub_if_list
, list
) {
2319 if (sdata
->dev
!= dev
&& netif_running(sdata
->dev
)) {
2324 read_unlock(&local
->sub_if_lock
);
2328 static int ieee80211_master_stop(struct net_device
*dev
)
2330 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
2331 struct ieee80211_sub_if_data
*sdata
;
2333 read_lock(&local
->sub_if_lock
);
2334 list_for_each_entry(sdata
, &local
->sub_if_list
, list
)
2335 if (sdata
->dev
!= dev
&& netif_running(sdata
->dev
))
2336 dev_close(sdata
->dev
);
2337 read_unlock(&local
->sub_if_lock
);
2342 static int ieee80211_mgmt_open(struct net_device
*dev
)
2344 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
2346 if (!netif_running(local
->mdev
))
2351 static int ieee80211_mgmt_stop(struct net_device
*dev
)
2356 /* Check if running monitor interfaces should go to a "soft monitor" mode
2357 * and switch them if necessary. */
2358 static inline void ieee80211_start_soft_monitor(struct ieee80211_local
*local
)
2360 struct ieee80211_if_init_conf conf
;
2362 if (local
->open_count
&& local
->open_count
== local
->monitors
&&
2363 !(local
->hw
.flags
& IEEE80211_HW_MONITOR_DURING_OPER
) &&
2364 local
->ops
->remove_interface
) {
2366 conf
.type
= IEEE80211_IF_TYPE_MNTR
;
2367 conf
.mac_addr
= NULL
;
2368 local
->ops
->remove_interface(local_to_hw(local
), &conf
);
2372 /* Check if running monitor interfaces should go to a "hard monitor" mode
2373 * and switch them if necessary. */
2374 static void ieee80211_start_hard_monitor(struct ieee80211_local
*local
)
2376 struct ieee80211_if_init_conf conf
;
2378 if (local
->open_count
&& local
->open_count
== local
->monitors
&&
2379 !(local
->hw
.flags
& IEEE80211_HW_MONITOR_DURING_OPER
) &&
2380 local
->ops
->add_interface
) {
2382 conf
.type
= IEEE80211_IF_TYPE_MNTR
;
2383 conf
.mac_addr
= NULL
;
2384 local
->ops
->add_interface(local_to_hw(local
), &conf
);
2388 static int ieee80211_open(struct net_device
*dev
)
2390 struct ieee80211_sub_if_data
*sdata
, *nsdata
;
2391 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
2392 struct ieee80211_if_init_conf conf
;
2395 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
2396 read_lock(&local
->sub_if_lock
);
2397 list_for_each_entry(nsdata
, &local
->sub_if_list
, list
) {
2398 struct net_device
*ndev
= nsdata
->dev
;
2400 if (ndev
!= dev
&& ndev
!= local
->mdev
&& netif_running(ndev
) &&
2401 compare_ether_addr(dev
->dev_addr
, ndev
->dev_addr
) == 0 &&
2402 !identical_mac_addr_allowed(sdata
->type
, nsdata
->type
)) {
2403 read_unlock(&local
->sub_if_lock
);
2407 read_unlock(&local
->sub_if_lock
);
2409 if (sdata
->type
== IEEE80211_IF_TYPE_WDS
&&
2410 is_zero_ether_addr(sdata
->u
.wds
.remote_addr
))
2413 if (sdata
->type
== IEEE80211_IF_TYPE_MNTR
&& local
->open_count
&&
2414 !(local
->hw
.flags
& IEEE80211_HW_MONITOR_DURING_OPER
)) {
2415 /* run the interface in a "soft monitor" mode */
2417 local
->open_count
++;
2418 local
->hw
.conf
.flags
|= IEEE80211_CONF_RADIOTAP
;
2421 ieee80211_start_soft_monitor(local
);
2423 if (local
->ops
->add_interface
) {
2424 conf
.if_id
= dev
->ifindex
;
2425 conf
.type
= sdata
->type
;
2426 conf
.mac_addr
= dev
->dev_addr
;
2427 res
= local
->ops
->add_interface(local_to_hw(local
), &conf
);
2429 if (sdata
->type
== IEEE80211_IF_TYPE_MNTR
)
2430 ieee80211_start_hard_monitor(local
);
2434 if (sdata
->type
!= IEEE80211_IF_TYPE_STA
)
2436 if (local
->open_count
> 0)
2440 if (local
->open_count
== 0) {
2442 tasklet_enable(&local
->tx_pending_tasklet
);
2443 tasklet_enable(&local
->tasklet
);
2444 if (local
->ops
->open
)
2445 res
= local
->ops
->open(local_to_hw(local
));
2447 res
= dev_open(local
->mdev
);
2449 if (local
->ops
->stop
)
2450 local
->ops
->stop(local_to_hw(local
));
2452 res
= ieee80211_hw_config(local
);
2453 if (res
&& local
->ops
->stop
)
2454 local
->ops
->stop(local_to_hw(local
));
2455 else if (!res
&& local
->apdev
)
2456 dev_open(local
->apdev
);
2460 if (local
->ops
->remove_interface
)
2461 local
->ops
->remove_interface(local_to_hw(local
),
2466 local
->open_count
++;
2468 if (sdata
->type
== IEEE80211_IF_TYPE_MNTR
) {
2470 local
->hw
.conf
.flags
|= IEEE80211_CONF_RADIOTAP
;
2472 ieee80211_if_config(dev
);
2474 if (sdata
->type
== IEEE80211_IF_TYPE_STA
&&
2475 !local
->user_space_mlme
)
2476 netif_carrier_off(dev
);
2478 netif_carrier_on(dev
);
2480 netif_start_queue(dev
);
2485 static int ieee80211_stop(struct net_device
*dev
)
2487 struct ieee80211_sub_if_data
*sdata
;
2488 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
2490 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
2492 if (sdata
->type
== IEEE80211_IF_TYPE_MNTR
&&
2493 local
->open_count
> 1 &&
2494 !(local
->hw
.flags
& IEEE80211_HW_MONITOR_DURING_OPER
)) {
2495 /* remove "soft monitor" interface */
2496 local
->open_count
--;
2498 if (!local
->monitors
)
2499 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_RADIOTAP
;
2503 netif_stop_queue(dev
);
2504 ieee80211_if_shutdown(dev
);
2506 if (sdata
->type
== IEEE80211_IF_TYPE_MNTR
) {
2508 if (!local
->monitors
)
2509 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_RADIOTAP
;
2512 local
->open_count
--;
2513 if (local
->open_count
== 0) {
2514 if (netif_running(local
->mdev
))
2515 dev_close(local
->mdev
);
2517 dev_close(local
->apdev
);
2518 if (local
->ops
->stop
)
2519 local
->ops
->stop(local_to_hw(local
));
2520 tasklet_disable(&local
->tx_pending_tasklet
);
2521 tasklet_disable(&local
->tasklet
);
2523 if (local
->ops
->remove_interface
) {
2524 struct ieee80211_if_init_conf conf
;
2526 conf
.if_id
= dev
->ifindex
;
2527 conf
.type
= sdata
->type
;
2528 conf
.mac_addr
= dev
->dev_addr
;
2529 local
->ops
->remove_interface(local_to_hw(local
), &conf
);
2532 ieee80211_start_hard_monitor(local
);
2538 static int header_parse_80211(struct sk_buff
*skb
, unsigned char *haddr
)
2540 memcpy(haddr
, skb_mac_header(skb
) + 10, ETH_ALEN
); /* addr2 */
2544 static inline int ieee80211_bssid_match(const u8
*raddr
, const u8
*addr
)
2546 return compare_ether_addr(raddr
, addr
) == 0 ||
2547 is_broadcast_ether_addr(raddr
);
2551 static ieee80211_txrx_result
2552 ieee80211_rx_h_data(struct ieee80211_txrx_data
*rx
)
2554 struct net_device
*dev
= rx
->dev
;
2555 struct ieee80211_local
*local
= rx
->local
;
2556 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) rx
->skb
->data
;
2557 u16 fc
, hdrlen
, ethertype
;
2561 struct sk_buff
*skb
= rx
->skb
, *skb2
;
2562 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
2565 if (unlikely((fc
& IEEE80211_FCTL_FTYPE
) != IEEE80211_FTYPE_DATA
))
2566 return TXRX_CONTINUE
;
2568 if (unlikely(!WLAN_FC_DATA_PRESENT(fc
)))
2571 hdrlen
= ieee80211_get_hdrlen(fc
);
2573 /* convert IEEE 802.11 header + possible LLC headers into Ethernet
2575 * IEEE 802.11 address fields:
2576 * ToDS FromDS Addr1 Addr2 Addr3 Addr4
2577 * 0 0 DA SA BSSID n/a
2578 * 0 1 DA BSSID SA n/a
2579 * 1 0 BSSID SA DA n/a
2583 switch (fc
& (IEEE80211_FCTL_TODS
| IEEE80211_FCTL_FROMDS
)) {
2584 case IEEE80211_FCTL_TODS
:
2586 memcpy(dst
, hdr
->addr3
, ETH_ALEN
);
2587 memcpy(src
, hdr
->addr2
, ETH_ALEN
);
2589 if (unlikely(sdata
->type
!= IEEE80211_IF_TYPE_AP
&&
2590 sdata
->type
!= IEEE80211_IF_TYPE_VLAN
)) {
2591 printk(KERN_DEBUG
"%s: dropped ToDS frame (BSSID="
2592 MAC_FMT
" SA=" MAC_FMT
" DA=" MAC_FMT
")\n",
2593 dev
->name
, MAC_ARG(hdr
->addr1
),
2594 MAC_ARG(hdr
->addr2
), MAC_ARG(hdr
->addr3
));
2598 case (IEEE80211_FCTL_TODS
| IEEE80211_FCTL_FROMDS
):
2600 memcpy(dst
, hdr
->addr3
, ETH_ALEN
);
2601 memcpy(src
, hdr
->addr4
, ETH_ALEN
);
2603 if (unlikely(sdata
->type
!= IEEE80211_IF_TYPE_WDS
)) {
2604 printk(KERN_DEBUG
"%s: dropped FromDS&ToDS frame (RA="
2605 MAC_FMT
" TA=" MAC_FMT
" DA=" MAC_FMT
" SA="
2607 rx
->dev
->name
, MAC_ARG(hdr
->addr1
),
2608 MAC_ARG(hdr
->addr2
), MAC_ARG(hdr
->addr3
),
2609 MAC_ARG(hdr
->addr4
));
2613 case IEEE80211_FCTL_FROMDS
:
2615 memcpy(dst
, hdr
->addr1
, ETH_ALEN
);
2616 memcpy(src
, hdr
->addr3
, ETH_ALEN
);
2618 if (sdata
->type
!= IEEE80211_IF_TYPE_STA
) {
2624 memcpy(dst
, hdr
->addr1
, ETH_ALEN
);
2625 memcpy(src
, hdr
->addr2
, ETH_ALEN
);
2627 if (sdata
->type
!= IEEE80211_IF_TYPE_IBSS
) {
2628 if (net_ratelimit()) {
2629 printk(KERN_DEBUG
"%s: dropped IBSS frame (DA="
2630 MAC_FMT
" SA=" MAC_FMT
" BSSID=" MAC_FMT
2632 dev
->name
, MAC_ARG(hdr
->addr1
),
2633 MAC_ARG(hdr
->addr2
),
2634 MAC_ARG(hdr
->addr3
));
2641 payload
= skb
->data
+ hdrlen
;
2643 if (unlikely(skb
->len
- hdrlen
< 8)) {
2644 if (net_ratelimit()) {
2645 printk(KERN_DEBUG
"%s: RX too short data frame "
2646 "payload\n", dev
->name
);
2651 ethertype
= (payload
[6] << 8) | payload
[7];
2653 if (likely((compare_ether_addr(payload
, rfc1042_header
) == 0 &&
2654 ethertype
!= ETH_P_AARP
&& ethertype
!= ETH_P_IPX
) ||
2655 compare_ether_addr(payload
, bridge_tunnel_header
) == 0)) {
2656 /* remove RFC1042 or Bridge-Tunnel encapsulation and
2657 * replace EtherType */
2658 skb_pull(skb
, hdrlen
+ 6);
2659 memcpy(skb_push(skb
, ETH_ALEN
), src
, ETH_ALEN
);
2660 memcpy(skb_push(skb
, ETH_ALEN
), dst
, ETH_ALEN
);
2662 struct ethhdr
*ehdr
;
2664 skb_pull(skb
, hdrlen
);
2665 len
= htons(skb
->len
);
2666 ehdr
= (struct ethhdr
*) skb_push(skb
, sizeof(struct ethhdr
));
2667 memcpy(ehdr
->h_dest
, dst
, ETH_ALEN
);
2668 memcpy(ehdr
->h_source
, src
, ETH_ALEN
);
2669 ehdr
->h_proto
= len
;
2675 sdata
->stats
.rx_packets
++;
2676 sdata
->stats
.rx_bytes
+= skb
->len
;
2678 if (local
->bridge_packets
&& (sdata
->type
== IEEE80211_IF_TYPE_AP
2679 || sdata
->type
== IEEE80211_IF_TYPE_VLAN
) && rx
->u
.rx
.ra_match
) {
2680 if (is_multicast_ether_addr(skb
->data
)) {
2681 /* send multicast frames both to higher layers in
2682 * local net stack and back to the wireless media */
2683 skb2
= skb_copy(skb
, GFP_ATOMIC
);
2685 printk(KERN_DEBUG
"%s: failed to clone "
2686 "multicast frame\n", dev
->name
);
2688 struct sta_info
*dsta
;
2689 dsta
= sta_info_get(local
, skb
->data
);
2690 if (dsta
&& !dsta
->dev
) {
2691 printk(KERN_DEBUG
"Station with null dev "
2693 } else if (dsta
&& dsta
->dev
== dev
) {
2694 /* Destination station is associated to this
2695 * AP, so send the frame directly to it and
2696 * do not pass the frame to local net stack.
2707 /* deliver to local stack */
2708 skb
->protocol
= eth_type_trans(skb
, dev
);
2709 memset(skb
->cb
, 0, sizeof(skb
->cb
));
2714 /* send to wireless media */
2715 skb2
->protocol
= __constant_htons(ETH_P_802_3
);
2716 skb_set_network_header(skb2
, 0);
2717 skb_set_mac_header(skb2
, 0);
2718 dev_queue_xmit(skb2
);
2725 static struct ieee80211_rate
*
2726 ieee80211_get_rate(struct ieee80211_local
*local
, int phymode
, int hw_rate
)
2728 struct ieee80211_hw_mode
*mode
;
2731 list_for_each_entry(mode
, &local
->modes_list
, list
) {
2732 if (mode
->mode
!= phymode
)
2734 for (r
= 0; r
< mode
->num_rates
; r
++) {
2735 struct ieee80211_rate
*rate
= &mode
->rates
[r
];
2736 if (rate
->val
== hw_rate
||
2737 (rate
->flags
& IEEE80211_RATE_PREAMBLE2
&&
2738 rate
->val2
== hw_rate
))
2747 ieee80211_fill_frame_info(struct ieee80211_local
*local
,
2748 struct ieee80211_frame_info
*fi
,
2749 struct ieee80211_rx_status
*status
)
2753 struct ieee80211_rate
*rate
;
2755 jiffies_to_timespec(jiffies
, &ts
);
2756 fi
->hosttime
= cpu_to_be64((u64
) ts
.tv_sec
* 1000000 +
2758 fi
->mactime
= cpu_to_be64(status
->mactime
);
2759 switch (status
->phymode
) {
2760 case MODE_IEEE80211A
:
2761 fi
->phytype
= htonl(ieee80211_phytype_ofdm_dot11_a
);
2763 case MODE_IEEE80211B
:
2764 fi
->phytype
= htonl(ieee80211_phytype_dsss_dot11_b
);
2766 case MODE_IEEE80211G
:
2767 fi
->phytype
= htonl(ieee80211_phytype_pbcc_dot11_g
);
2769 case MODE_ATHEROS_TURBO
:
2771 htonl(ieee80211_phytype_dsss_dot11_turbo
);
2774 fi
->phytype
= htonl(0xAAAAAAAA);
2777 fi
->channel
= htonl(status
->channel
);
2778 rate
= ieee80211_get_rate(local
, status
->phymode
,
2781 fi
->datarate
= htonl(rate
->rate
);
2782 if (rate
->flags
& IEEE80211_RATE_PREAMBLE2
) {
2783 if (status
->rate
== rate
->val
)
2784 fi
->preamble
= htonl(2); /* long */
2785 else if (status
->rate
== rate
->val2
)
2786 fi
->preamble
= htonl(1); /* short */
2788 fi
->preamble
= htonl(0);
2790 fi
->datarate
= htonl(0);
2791 fi
->preamble
= htonl(0);
2794 fi
->antenna
= htonl(status
->antenna
);
2795 fi
->priority
= htonl(0xffffffff); /* no clue */
2796 fi
->ssi_type
= htonl(ieee80211_ssi_raw
);
2797 fi
->ssi_signal
= htonl(status
->ssi
);
2798 fi
->ssi_noise
= 0x00000000;
2801 /* clear everything because we really don't know.
2802 * the msg_type field isn't present on monitor frames
2803 * so we don't know whether it will be present or not,
2804 * but it's ok to not clear it since it'll be assigned
2806 memset(fi
, 0, sizeof(*fi
) - sizeof(fi
->msg_type
));
2808 fi
->ssi_type
= htonl(ieee80211_ssi_none
);
2810 fi
->version
= htonl(IEEE80211_FI_VERSION
);
2811 fi
->length
= cpu_to_be32(sizeof(*fi
) - sizeof(fi
->msg_type
));
2814 /* this routine is actually not just for this, but also
2815 * for pushing fake 'management' frames into userspace.
2816 * it shall be replaced by a netlink-based system. */
2818 ieee80211_rx_mgmt(struct ieee80211_local
*local
, struct sk_buff
*skb
,
2819 struct ieee80211_rx_status
*status
, u32 msg_type
)
2821 struct ieee80211_frame_info
*fi
;
2822 const size_t hlen
= sizeof(struct ieee80211_frame_info
);
2823 struct ieee80211_sub_if_data
*sdata
;
2825 skb
->dev
= local
->apdev
;
2827 sdata
= IEEE80211_DEV_TO_SUB_IF(local
->apdev
);
2829 if (skb_headroom(skb
) < hlen
) {
2830 I802_DEBUG_INC(local
->rx_expand_skb_head
);
2831 if (pskb_expand_head(skb
, hlen
, 0, GFP_ATOMIC
)) {
2837 fi
= (struct ieee80211_frame_info
*) skb_push(skb
, hlen
);
2839 ieee80211_fill_frame_info(local
, fi
, status
);
2840 fi
->msg_type
= htonl(msg_type
);
2842 sdata
->stats
.rx_packets
++;
2843 sdata
->stats
.rx_bytes
+= skb
->len
;
2845 skb_set_mac_header(skb
, 0);
2846 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
2847 skb
->pkt_type
= PACKET_OTHERHOST
;
2848 skb
->protocol
= htons(ETH_P_802_2
);
2849 memset(skb
->cb
, 0, sizeof(skb
->cb
));
2854 ieee80211_rx_monitor(struct net_device
*dev
, struct sk_buff
*skb
,
2855 struct ieee80211_rx_status
*status
)
2857 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
2858 struct ieee80211_sub_if_data
*sdata
;
2859 struct ieee80211_rate
*rate
;
2860 struct ieee80211_rtap_hdr
{
2861 struct ieee80211_radiotap_header hdr
;
2867 } __attribute__ ((packed
)) *rthdr
;
2871 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
2873 if (status
->flag
& RX_FLAG_RADIOTAP
)
2876 if (skb_headroom(skb
) < sizeof(*rthdr
)) {
2877 I802_DEBUG_INC(local
->rx_expand_skb_head
);
2878 if (pskb_expand_head(skb
, sizeof(*rthdr
), 0, GFP_ATOMIC
)) {
2884 rthdr
= (struct ieee80211_rtap_hdr
*) skb_push(skb
, sizeof(*rthdr
));
2885 memset(rthdr
, 0, sizeof(*rthdr
));
2886 rthdr
->hdr
.it_len
= cpu_to_le16(sizeof(*rthdr
));
2887 rthdr
->hdr
.it_present
=
2888 cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS
) |
2889 (1 << IEEE80211_RADIOTAP_RATE
) |
2890 (1 << IEEE80211_RADIOTAP_CHANNEL
) |
2891 (1 << IEEE80211_RADIOTAP_DB_ANTSIGNAL
));
2892 rthdr
->flags
= local
->hw
.flags
& IEEE80211_HW_RX_INCLUDES_FCS
?
2893 IEEE80211_RADIOTAP_F_FCS
: 0;
2894 rate
= ieee80211_get_rate(local
, status
->phymode
, status
->rate
);
2896 rthdr
->rate
= rate
->rate
/ 5;
2897 rthdr
->chan_freq
= cpu_to_le16(status
->freq
);
2899 status
->phymode
== MODE_IEEE80211A
?
2900 cpu_to_le16(IEEE80211_CHAN_OFDM
| IEEE80211_CHAN_5GHZ
) :
2901 cpu_to_le16(IEEE80211_CHAN_DYN
| IEEE80211_CHAN_2GHZ
);
2902 rthdr
->antsignal
= status
->ssi
;
2905 sdata
->stats
.rx_packets
++;
2906 sdata
->stats
.rx_bytes
+= skb
->len
;
2908 skb_set_mac_header(skb
, 0);
2909 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
2910 skb
->pkt_type
= PACKET_OTHERHOST
;
2911 skb
->protocol
= htons(ETH_P_802_2
);
2912 memset(skb
->cb
, 0, sizeof(skb
->cb
));
2916 int ieee80211_radar_status(struct ieee80211_hw
*hw
, int channel
,
2917 int radar
, int radar_type
)
2919 struct sk_buff
*skb
;
2920 struct ieee80211_radar_info
*msg
;
2921 struct ieee80211_local
*local
= hw_to_local(hw
);
2926 skb
= dev_alloc_skb(sizeof(struct ieee80211_frame_info
) +
2927 sizeof(struct ieee80211_radar_info
));
2931 skb_reserve(skb
, sizeof(struct ieee80211_frame_info
));
2933 msg
= (struct ieee80211_radar_info
*)
2934 skb_put(skb
, sizeof(struct ieee80211_radar_info
));
2935 msg
->channel
= channel
;
2937 msg
->radar_type
= radar_type
;
2939 ieee80211_rx_mgmt(local
, skb
, NULL
, ieee80211_msg_radar
);
2942 EXPORT_SYMBOL(ieee80211_radar_status
);
2944 int ieee80211_set_aid_for_sta(struct ieee80211_hw
*hw
, u8
*peer_address
,
2947 struct sk_buff
*skb
;
2948 struct ieee80211_msg_set_aid_for_sta
*msg
;
2949 struct ieee80211_local
*local
= hw_to_local(hw
);
2951 /* unlikely because if this event only happens for APs,
2952 * which require an open ap device. */
2953 if (unlikely(!local
->apdev
))
2956 skb
= dev_alloc_skb(sizeof(struct ieee80211_frame_info
) +
2957 sizeof(struct ieee80211_msg_set_aid_for_sta
));
2961 skb_reserve(skb
, sizeof(struct ieee80211_frame_info
));
2963 msg
= (struct ieee80211_msg_set_aid_for_sta
*)
2964 skb_put(skb
, sizeof(struct ieee80211_msg_set_aid_for_sta
));
2965 memcpy(msg
->sta_address
, peer_address
, ETH_ALEN
);
2968 ieee80211_rx_mgmt(local
, skb
, NULL
, ieee80211_msg_set_aid_for_sta
);
2971 EXPORT_SYMBOL(ieee80211_set_aid_for_sta
);
2973 static void ap_sta_ps_start(struct net_device
*dev
, struct sta_info
*sta
)
2975 struct ieee80211_sub_if_data
*sdata
;
2976 sdata
= IEEE80211_DEV_TO_SUB_IF(sta
->dev
);
2979 atomic_inc(&sdata
->bss
->num_sta_ps
);
2980 sta
->flags
|= WLAN_STA_PS
;
2982 #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
2983 printk(KERN_DEBUG
"%s: STA " MAC_FMT
" aid %d enters power "
2984 "save mode\n", dev
->name
, MAC_ARG(sta
->addr
), sta
->aid
);
2985 #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
2989 static int ap_sta_ps_end(struct net_device
*dev
, struct sta_info
*sta
)
2991 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
2992 struct sk_buff
*skb
;
2994 struct ieee80211_sub_if_data
*sdata
;
2995 struct ieee80211_tx_packet_data
*pkt_data
;
2997 sdata
= IEEE80211_DEV_TO_SUB_IF(sta
->dev
);
2999 atomic_dec(&sdata
->bss
->num_sta_ps
);
3000 sta
->flags
&= ~(WLAN_STA_PS
| WLAN_STA_TIM
);
3002 if (!skb_queue_empty(&sta
->ps_tx_buf
)) {
3003 if (local
->ops
->set_tim
)
3004 local
->ops
->set_tim(local_to_hw(local
), sta
->aid
, 0);
3006 bss_tim_clear(local
, sdata
->bss
, sta
->aid
);
3008 #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
3009 printk(KERN_DEBUG
"%s: STA " MAC_FMT
" aid %d exits power "
3010 "save mode\n", dev
->name
, MAC_ARG(sta
->addr
), sta
->aid
);
3011 #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
3012 /* Send all buffered frames to the station */
3013 while ((skb
= skb_dequeue(&sta
->tx_filtered
)) != NULL
) {
3014 pkt_data
= (struct ieee80211_tx_packet_data
*) skb
->cb
;
3016 pkt_data
->requeue
= 1;
3017 dev_queue_xmit(skb
);
3019 while ((skb
= skb_dequeue(&sta
->ps_tx_buf
)) != NULL
) {
3020 pkt_data
= (struct ieee80211_tx_packet_data
*) skb
->cb
;
3021 local
->total_ps_buffered
--;
3023 #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
3024 printk(KERN_DEBUG
"%s: STA " MAC_FMT
" aid %d send PS frame "
3025 "since STA not sleeping anymore\n", dev
->name
,
3026 MAC_ARG(sta
->addr
), sta
->aid
);
3027 #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
3028 pkt_data
->requeue
= 1;
3029 dev_queue_xmit(skb
);
3036 static ieee80211_txrx_result
3037 ieee80211_rx_h_ps_poll(struct ieee80211_txrx_data
*rx
)
3039 struct sk_buff
*skb
;
3040 int no_pending_pkts
;
3042 if (likely(!rx
->sta
||
3043 (rx
->fc
& IEEE80211_FCTL_FTYPE
) != IEEE80211_FTYPE_CTL
||
3044 (rx
->fc
& IEEE80211_FCTL_STYPE
) != IEEE80211_STYPE_PSPOLL
||
3045 !rx
->u
.rx
.ra_match
))
3046 return TXRX_CONTINUE
;
3048 skb
= skb_dequeue(&rx
->sta
->tx_filtered
);
3050 skb
= skb_dequeue(&rx
->sta
->ps_tx_buf
);
3052 rx
->local
->total_ps_buffered
--;
3054 no_pending_pkts
= skb_queue_empty(&rx
->sta
->tx_filtered
) &&
3055 skb_queue_empty(&rx
->sta
->ps_tx_buf
);
3058 struct ieee80211_hdr
*hdr
=
3059 (struct ieee80211_hdr
*) skb
->data
;
3061 /* tell TX path to send one frame even though the STA may
3062 * still remain is PS mode after this frame exchange */
3063 rx
->sta
->pspoll
= 1;
3065 #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
3066 printk(KERN_DEBUG
"STA " MAC_FMT
" aid %d: PS Poll (entries "
3068 MAC_ARG(rx
->sta
->addr
), rx
->sta
->aid
,
3069 skb_queue_len(&rx
->sta
->ps_tx_buf
));
3070 #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
3072 /* Use MoreData flag to indicate whether there are more
3073 * buffered frames for this STA */
3074 if (no_pending_pkts
) {
3075 hdr
->frame_control
&= cpu_to_le16(~IEEE80211_FCTL_MOREDATA
);
3076 rx
->sta
->flags
&= ~WLAN_STA_TIM
;
3078 hdr
->frame_control
|= cpu_to_le16(IEEE80211_FCTL_MOREDATA
);
3080 dev_queue_xmit(skb
);
3082 if (no_pending_pkts
) {
3083 if (rx
->local
->ops
->set_tim
)
3084 rx
->local
->ops
->set_tim(local_to_hw(rx
->local
),
3087 bss_tim_clear(rx
->local
, rx
->sdata
->bss
, rx
->sta
->aid
);
3089 #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG
3090 } else if (!rx
->u
.rx
.sent_ps_buffered
) {
3091 printk(KERN_DEBUG
"%s: STA " MAC_FMT
" sent PS Poll even "
3092 "though there is no buffered frames for it\n",
3093 rx
->dev
->name
, MAC_ARG(rx
->sta
->addr
));
3094 #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */
3098 /* Free PS Poll skb here instead of returning TXRX_DROP that would
3099 * count as an dropped frame. */
3100 dev_kfree_skb(rx
->skb
);
3106 static inline struct ieee80211_fragment_entry
*
3107 ieee80211_reassemble_add(struct ieee80211_sub_if_data
*sdata
,
3108 unsigned int frag
, unsigned int seq
, int rx_queue
,
3109 struct sk_buff
**skb
)
3111 struct ieee80211_fragment_entry
*entry
;
3114 idx
= sdata
->fragment_next
;
3115 entry
= &sdata
->fragments
[sdata
->fragment_next
++];
3116 if (sdata
->fragment_next
>= IEEE80211_FRAGMENT_MAX
)
3117 sdata
->fragment_next
= 0;
3119 if (!skb_queue_empty(&entry
->skb_list
)) {
3120 #ifdef CONFIG_MAC80211_DEBUG
3121 struct ieee80211_hdr
*hdr
=
3122 (struct ieee80211_hdr
*) entry
->skb_list
.next
->data
;
3123 printk(KERN_DEBUG
"%s: RX reassembly removed oldest "
3124 "fragment entry (idx=%d age=%lu seq=%d last_frag=%d "
3125 "addr1=" MAC_FMT
" addr2=" MAC_FMT
"\n",
3126 sdata
->dev
->name
, idx
,
3127 jiffies
- entry
->first_frag_time
, entry
->seq
,
3128 entry
->last_frag
, MAC_ARG(hdr
->addr1
),
3129 MAC_ARG(hdr
->addr2
));
3130 #endif /* CONFIG_MAC80211_DEBUG */
3131 __skb_queue_purge(&entry
->skb_list
);
3134 __skb_queue_tail(&entry
->skb_list
, *skb
); /* no need for locking */
3136 entry
->first_frag_time
= jiffies
;
3138 entry
->rx_queue
= rx_queue
;
3139 entry
->last_frag
= frag
;
3141 entry
->extra_len
= 0;
3147 static inline struct ieee80211_fragment_entry
*
3148 ieee80211_reassemble_find(struct ieee80211_sub_if_data
*sdata
,
3149 u16 fc
, unsigned int frag
, unsigned int seq
,
3150 int rx_queue
, struct ieee80211_hdr
*hdr
)
3152 struct ieee80211_fragment_entry
*entry
;
3155 idx
= sdata
->fragment_next
;
3156 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++) {
3157 struct ieee80211_hdr
*f_hdr
;
3162 idx
= IEEE80211_FRAGMENT_MAX
- 1;
3164 entry
= &sdata
->fragments
[idx
];
3165 if (skb_queue_empty(&entry
->skb_list
) || entry
->seq
!= seq
||
3166 entry
->rx_queue
!= rx_queue
||
3167 entry
->last_frag
+ 1 != frag
)
3170 f_hdr
= (struct ieee80211_hdr
*) entry
->skb_list
.next
->data
;
3171 f_fc
= le16_to_cpu(f_hdr
->frame_control
);
3173 if ((fc
& IEEE80211_FCTL_FTYPE
) != (f_fc
& IEEE80211_FCTL_FTYPE
) ||
3174 compare_ether_addr(hdr
->addr1
, f_hdr
->addr1
) != 0 ||
3175 compare_ether_addr(hdr
->addr2
, f_hdr
->addr2
) != 0)
3178 if (entry
->first_frag_time
+ 2 * HZ
< jiffies
) {
3179 __skb_queue_purge(&entry
->skb_list
);
3189 static ieee80211_txrx_result
3190 ieee80211_rx_h_defragment(struct ieee80211_txrx_data
*rx
)
3192 struct ieee80211_hdr
*hdr
;
3194 unsigned int frag
, seq
;
3195 struct ieee80211_fragment_entry
*entry
;
3196 struct sk_buff
*skb
;
3198 hdr
= (struct ieee80211_hdr
*) rx
->skb
->data
;
3199 sc
= le16_to_cpu(hdr
->seq_ctrl
);
3200 frag
= sc
& IEEE80211_SCTL_FRAG
;
3202 if (likely((!(rx
->fc
& IEEE80211_FCTL_MOREFRAGS
) && frag
== 0) ||
3203 (rx
->skb
)->len
< 24 ||
3204 is_multicast_ether_addr(hdr
->addr1
))) {
3205 /* not fragmented */
3208 I802_DEBUG_INC(rx
->local
->rx_handlers_fragments
);
3210 seq
= (sc
& IEEE80211_SCTL_SEQ
) >> 4;
3213 /* This is the first fragment of a new frame. */
3214 entry
= ieee80211_reassemble_add(rx
->sdata
, frag
, seq
,
3215 rx
->u
.rx
.queue
, &(rx
->skb
));
3216 if (rx
->key
&& rx
->key
->alg
== ALG_CCMP
&&
3217 (rx
->fc
& IEEE80211_FCTL_PROTECTED
)) {
3218 /* Store CCMP PN so that we can verify that the next
3219 * fragment has a sequential PN value. */
3221 memcpy(entry
->last_pn
,
3222 rx
->key
->u
.ccmp
.rx_pn
[rx
->u
.rx
.queue
],
3228 /* This is a fragment for a frame that should already be pending in
3229 * fragment cache. Add this fragment to the end of the pending entry.
3231 entry
= ieee80211_reassemble_find(rx
->sdata
, rx
->fc
, frag
, seq
,
3232 rx
->u
.rx
.queue
, hdr
);
3234 I802_DEBUG_INC(rx
->local
->rx_handlers_drop_defrag
);
3238 /* Verify that MPDUs within one MSDU have sequential PN values.
3239 * (IEEE 802.11i, 8.3.3.4.5) */
3242 u8 pn
[CCMP_PN_LEN
], *rpn
;
3243 if (!rx
->key
|| rx
->key
->alg
!= ALG_CCMP
)
3245 memcpy(pn
, entry
->last_pn
, CCMP_PN_LEN
);
3246 for (i
= CCMP_PN_LEN
- 1; i
>= 0; i
--) {
3251 rpn
= rx
->key
->u
.ccmp
.rx_pn
[rx
->u
.rx
.queue
];
3252 if (memcmp(pn
, rpn
, CCMP_PN_LEN
) != 0) {
3253 printk(KERN_DEBUG
"%s: defrag: CCMP PN not sequential"
3254 " A2=" MAC_FMT
" PN=%02x%02x%02x%02x%02x%02x "
3255 "(expected %02x%02x%02x%02x%02x%02x)\n",
3256 rx
->dev
->name
, MAC_ARG(hdr
->addr2
),
3257 rpn
[0], rpn
[1], rpn
[2], rpn
[3], rpn
[4], rpn
[5],
3258 pn
[0], pn
[1], pn
[2], pn
[3], pn
[4], pn
[5]);
3261 memcpy(entry
->last_pn
, pn
, CCMP_PN_LEN
);
3264 skb_pull(rx
->skb
, ieee80211_get_hdrlen(rx
->fc
));
3265 __skb_queue_tail(&entry
->skb_list
, rx
->skb
);
3266 entry
->last_frag
= frag
;
3267 entry
->extra_len
+= rx
->skb
->len
;
3268 if (rx
->fc
& IEEE80211_FCTL_MOREFRAGS
) {
3273 rx
->skb
= __skb_dequeue(&entry
->skb_list
);
3274 if (skb_tailroom(rx
->skb
) < entry
->extra_len
) {
3275 I802_DEBUG_INC(rx
->local
->rx_expand_skb_head2
);
3276 if (unlikely(pskb_expand_head(rx
->skb
, 0, entry
->extra_len
,
3278 I802_DEBUG_INC(rx
->local
->rx_handlers_drop_defrag
);
3279 __skb_queue_purge(&entry
->skb_list
);
3283 while ((skb
= __skb_dequeue(&entry
->skb_list
))) {
3284 memcpy(skb_put(rx
->skb
, skb
->len
), skb
->data
, skb
->len
);
3288 /* Complete frame has been reassembled - process it now */
3293 rx
->sta
->rx_packets
++;
3294 if (is_multicast_ether_addr(hdr
->addr1
))
3295 rx
->local
->dot11MulticastReceivedFrameCount
++;
3297 ieee80211_led_rx(rx
->local
);
3298 return TXRX_CONTINUE
;
3302 static ieee80211_txrx_result
3303 ieee80211_rx_h_monitor(struct ieee80211_txrx_data
*rx
)
3305 if (rx
->sdata
->type
== IEEE80211_IF_TYPE_MNTR
) {
3306 ieee80211_rx_monitor(rx
->dev
, rx
->skb
, rx
->u
.rx
.status
);
3310 if (rx
->u
.rx
.status
->flag
& RX_FLAG_RADIOTAP
)
3311 skb_pull(rx
->skb
, ieee80211_get_radiotap_len(rx
->skb
));
3313 return TXRX_CONTINUE
;
3317 static ieee80211_txrx_result
3318 ieee80211_rx_h_check(struct ieee80211_txrx_data
*rx
)
3320 struct ieee80211_hdr
*hdr
;
3322 hdr
= (struct ieee80211_hdr
*) rx
->skb
->data
;
3324 /* Drop duplicate 802.11 retransmissions (IEEE 802.11 Chap. 9.2.9) */
3325 if (rx
->sta
&& !is_multicast_ether_addr(hdr
->addr1
)) {
3326 if (unlikely(rx
->fc
& IEEE80211_FCTL_RETRY
&&
3327 rx
->sta
->last_seq_ctrl
[rx
->u
.rx
.queue
] ==
3329 if (rx
->u
.rx
.ra_match
) {
3330 rx
->local
->dot11FrameDuplicateCount
++;
3331 rx
->sta
->num_duplicates
++;
3335 rx
->sta
->last_seq_ctrl
[rx
->u
.rx
.queue
] = hdr
->seq_ctrl
;
3338 if ((rx
->local
->hw
.flags
& IEEE80211_HW_RX_INCLUDES_FCS
) &&
3339 rx
->skb
->len
> FCS_LEN
)
3340 skb_trim(rx
->skb
, rx
->skb
->len
- FCS_LEN
);
3342 if (unlikely(rx
->skb
->len
< 16)) {
3343 I802_DEBUG_INC(rx
->local
->rx_handlers_drop_short
);
3347 if (!rx
->u
.rx
.ra_match
)
3348 rx
->skb
->pkt_type
= PACKET_OTHERHOST
;
3349 else if (compare_ether_addr(rx
->dev
->dev_addr
, hdr
->addr1
) == 0)
3350 rx
->skb
->pkt_type
= PACKET_HOST
;
3351 else if (is_multicast_ether_addr(hdr
->addr1
)) {
3352 if (is_broadcast_ether_addr(hdr
->addr1
))
3353 rx
->skb
->pkt_type
= PACKET_BROADCAST
;
3355 rx
->skb
->pkt_type
= PACKET_MULTICAST
;
3357 rx
->skb
->pkt_type
= PACKET_OTHERHOST
;
3359 /* Drop disallowed frame classes based on STA auth/assoc state;
3360 * IEEE 802.11, Chap 5.5.
3362 * 80211.o does filtering only based on association state, i.e., it
3363 * drops Class 3 frames from not associated stations. hostapd sends
3364 * deauth/disassoc frames when needed. In addition, hostapd is
3365 * responsible for filtering on both auth and assoc states.
3367 if (unlikely(((rx
->fc
& IEEE80211_FCTL_FTYPE
) == IEEE80211_FTYPE_DATA
||
3368 ((rx
->fc
& IEEE80211_FCTL_FTYPE
) == IEEE80211_FTYPE_CTL
&&
3369 (rx
->fc
& IEEE80211_FCTL_STYPE
) == IEEE80211_STYPE_PSPOLL
)) &&
3370 rx
->sdata
->type
!= IEEE80211_IF_TYPE_IBSS
&&
3371 (!rx
->sta
|| !(rx
->sta
->flags
& WLAN_STA_ASSOC
)))) {
3372 if ((!(rx
->fc
& IEEE80211_FCTL_FROMDS
) &&
3373 !(rx
->fc
& IEEE80211_FCTL_TODS
) &&
3374 (rx
->fc
& IEEE80211_FCTL_FTYPE
) == IEEE80211_FTYPE_DATA
)
3375 || !rx
->u
.rx
.ra_match
) {
3376 /* Drop IBSS frames and frames for other hosts
3381 if (!rx
->local
->apdev
)
3384 ieee80211_rx_mgmt(rx
->local
, rx
->skb
, rx
->u
.rx
.status
,
3385 ieee80211_msg_sta_not_assoc
);
3389 if (rx
->sdata
->type
== IEEE80211_IF_TYPE_STA
)
3394 if (rx
->sta
&& rx
->sta
->key
&& always_sta_key
) {
3395 rx
->key
= rx
->sta
->key
;
3397 if (rx
->sta
&& rx
->sta
->key
)
3398 rx
->key
= rx
->sta
->key
;
3400 rx
->key
= rx
->sdata
->default_key
;
3402 if ((rx
->local
->hw
.flags
& IEEE80211_HW_WEP_INCLUDE_IV
) &&
3403 rx
->fc
& IEEE80211_FCTL_PROTECTED
) {
3404 int keyidx
= ieee80211_wep_get_keyidx(rx
->skb
);
3406 if (keyidx
>= 0 && keyidx
< NUM_DEFAULT_KEYS
&&
3407 (!rx
->sta
|| !rx
->sta
->key
|| keyidx
> 0))
3408 rx
->key
= rx
->sdata
->keys
[keyidx
];
3411 if (!rx
->u
.rx
.ra_match
)
3413 printk(KERN_DEBUG
"%s: RX WEP frame with "
3414 "unknown keyidx %d (A1=" MAC_FMT
" A2="
3415 MAC_FMT
" A3=" MAC_FMT
")\n",
3416 rx
->dev
->name
, keyidx
,
3417 MAC_ARG(hdr
->addr1
),
3418 MAC_ARG(hdr
->addr2
),
3419 MAC_ARG(hdr
->addr3
));
3420 if (!rx
->local
->apdev
)
3423 rx
->local
, rx
->skb
, rx
->u
.rx
.status
,
3424 ieee80211_msg_wep_frame_unknown_key
);
3430 if (rx
->fc
& IEEE80211_FCTL_PROTECTED
&& rx
->key
&& rx
->u
.rx
.ra_match
) {
3431 rx
->key
->tx_rx_count
++;
3432 if (unlikely(rx
->local
->key_tx_rx_threshold
&&
3433 rx
->key
->tx_rx_count
>
3434 rx
->local
->key_tx_rx_threshold
)) {
3435 ieee80211_key_threshold_notify(rx
->dev
, rx
->key
,
3440 return TXRX_CONTINUE
;
3444 static ieee80211_txrx_result
3445 ieee80211_rx_h_sta_process(struct ieee80211_txrx_data
*rx
)
3447 struct sta_info
*sta
= rx
->sta
;
3448 struct net_device
*dev
= rx
->dev
;
3449 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) rx
->skb
->data
;
3452 return TXRX_CONTINUE
;
3454 /* Update last_rx only for IBSS packets which are for the current
3455 * BSSID to avoid keeping the current IBSS network alive in cases where
3456 * other STAs are using different BSSID. */
3457 if (rx
->sdata
->type
== IEEE80211_IF_TYPE_IBSS
) {
3458 u8
*bssid
= ieee80211_get_bssid(hdr
, rx
->skb
->len
);
3459 if (compare_ether_addr(bssid
, rx
->sdata
->u
.sta
.bssid
) == 0)
3460 sta
->last_rx
= jiffies
;
3462 if (!is_multicast_ether_addr(hdr
->addr1
) ||
3463 rx
->sdata
->type
== IEEE80211_IF_TYPE_STA
) {
3464 /* Update last_rx only for unicast frames in order to prevent
3465 * the Probe Request frames (the only broadcast frames from a
3466 * STA in infrastructure mode) from keeping a connection alive.
3468 sta
->last_rx
= jiffies
;
3471 if (!rx
->u
.rx
.ra_match
)
3472 return TXRX_CONTINUE
;
3474 sta
->rx_fragments
++;
3475 sta
->rx_bytes
+= rx
->skb
->len
;
3476 sta
->last_rssi
= (sta
->last_rssi
* 15 +
3477 rx
->u
.rx
.status
->ssi
) / 16;
3478 sta
->last_signal
= (sta
->last_signal
* 15 +
3479 rx
->u
.rx
.status
->signal
) / 16;
3480 sta
->last_noise
= (sta
->last_noise
* 15 +
3481 rx
->u
.rx
.status
->noise
) / 16;
3483 if (!(rx
->fc
& IEEE80211_FCTL_MOREFRAGS
)) {
3484 /* Change STA power saving mode only in the end of a frame
3485 * exchange sequence */
3486 if ((sta
->flags
& WLAN_STA_PS
) && !(rx
->fc
& IEEE80211_FCTL_PM
))
3487 rx
->u
.rx
.sent_ps_buffered
+= ap_sta_ps_end(dev
, sta
);
3488 else if (!(sta
->flags
& WLAN_STA_PS
) &&
3489 (rx
->fc
& IEEE80211_FCTL_PM
))
3490 ap_sta_ps_start(dev
, sta
);
3493 /* Drop data::nullfunc frames silently, since they are used only to
3494 * control station power saving mode. */
3495 if ((rx
->fc
& IEEE80211_FCTL_FTYPE
) == IEEE80211_FTYPE_DATA
&&
3496 (rx
->fc
& IEEE80211_FCTL_STYPE
) == IEEE80211_STYPE_NULLFUNC
) {
3497 I802_DEBUG_INC(rx
->local
->rx_handlers_drop_nullfunc
);
3498 /* Update counter and free packet here to avoid counting this
3499 * as a dropped packed. */
3501 dev_kfree_skb(rx
->skb
);
3505 return TXRX_CONTINUE
;
3506 } /* ieee80211_rx_h_sta_process */
3509 static ieee80211_txrx_result
3510 ieee80211_rx_h_wep_weak_iv_detection(struct ieee80211_txrx_data
*rx
)
3512 if (!rx
->sta
|| !(rx
->fc
& IEEE80211_FCTL_PROTECTED
) ||
3513 (rx
->fc
& IEEE80211_FCTL_FTYPE
) != IEEE80211_FTYPE_DATA
||
3514 !rx
->key
|| rx
->key
->alg
!= ALG_WEP
|| !rx
->u
.rx
.ra_match
)
3515 return TXRX_CONTINUE
;
3517 /* Check for weak IVs, if hwaccel did not remove IV from the frame */
3518 if ((rx
->local
->hw
.flags
& IEEE80211_HW_WEP_INCLUDE_IV
) ||
3519 rx
->key
->force_sw_encrypt
) {
3520 u8
*iv
= ieee80211_wep_is_weak_iv(rx
->skb
, rx
->key
);
3522 rx
->sta
->wep_weak_iv_count
++;
3526 return TXRX_CONTINUE
;
3530 static ieee80211_txrx_result
3531 ieee80211_rx_h_wep_decrypt(struct ieee80211_txrx_data
*rx
)
3533 /* If the device handles decryption totally, skip this test */
3534 if (rx
->local
->hw
.flags
& IEEE80211_HW_DEVICE_HIDES_WEP
)
3535 return TXRX_CONTINUE
;
3537 if ((rx
->key
&& rx
->key
->alg
!= ALG_WEP
) ||
3538 !(rx
->fc
& IEEE80211_FCTL_PROTECTED
) ||
3539 ((rx
->fc
& IEEE80211_FCTL_FTYPE
) != IEEE80211_FTYPE_DATA
&&
3540 ((rx
->fc
& IEEE80211_FCTL_FTYPE
) != IEEE80211_FTYPE_MGMT
||
3541 (rx
->fc
& IEEE80211_FCTL_STYPE
) != IEEE80211_STYPE_AUTH
)))
3542 return TXRX_CONTINUE
;
3545 printk(KERN_DEBUG
"%s: RX WEP frame, but no key set\n",
3550 if (!(rx
->u
.rx
.status
->flag
& RX_FLAG_DECRYPTED
) ||
3551 rx
->key
->force_sw_encrypt
) {
3552 if (ieee80211_wep_decrypt(rx
->local
, rx
->skb
, rx
->key
)) {
3553 printk(KERN_DEBUG
"%s: RX WEP frame, decrypt "
3554 "failed\n", rx
->dev
->name
);
3557 } else if (rx
->local
->hw
.flags
& IEEE80211_HW_WEP_INCLUDE_IV
) {
3558 ieee80211_wep_remove_iv(rx
->local
, rx
->skb
, rx
->key
);
3560 skb_trim(rx
->skb
, rx
->skb
->len
- 4);
3563 return TXRX_CONTINUE
;
3567 static ieee80211_txrx_result
3568 ieee80211_rx_h_802_1x_pae(struct ieee80211_txrx_data
*rx
)
3570 if (rx
->sdata
->eapol
&& ieee80211_is_eapol(rx
->skb
) &&
3571 rx
->sdata
->type
!= IEEE80211_IF_TYPE_STA
&& rx
->u
.rx
.ra_match
) {
3572 /* Pass both encrypted and unencrypted EAPOL frames to user
3573 * space for processing. */
3574 if (!rx
->local
->apdev
)
3576 ieee80211_rx_mgmt(rx
->local
, rx
->skb
, rx
->u
.rx
.status
,
3577 ieee80211_msg_normal
);
3581 if (unlikely(rx
->sdata
->ieee802_1x
&&
3582 (rx
->fc
& IEEE80211_FCTL_FTYPE
) == IEEE80211_FTYPE_DATA
&&
3583 (rx
->fc
& IEEE80211_FCTL_STYPE
) != IEEE80211_STYPE_NULLFUNC
&&
3584 (!rx
->sta
|| !(rx
->sta
->flags
& WLAN_STA_AUTHORIZED
)) &&
3585 !ieee80211_is_eapol(rx
->skb
))) {
3586 #ifdef CONFIG_MAC80211_DEBUG
3587 struct ieee80211_hdr
*hdr
=
3588 (struct ieee80211_hdr
*) rx
->skb
->data
;
3589 printk(KERN_DEBUG
"%s: dropped frame from " MAC_FMT
3590 " (unauthorized port)\n", rx
->dev
->name
,
3591 MAC_ARG(hdr
->addr2
));
3592 #endif /* CONFIG_MAC80211_DEBUG */
3596 return TXRX_CONTINUE
;
3600 static ieee80211_txrx_result
3601 ieee80211_rx_h_drop_unencrypted(struct ieee80211_txrx_data
*rx
)
3603 /* If the device handles decryption totally, skip this test */
3604 if (rx
->local
->hw
.flags
& IEEE80211_HW_DEVICE_HIDES_WEP
)
3605 return TXRX_CONTINUE
;
3607 /* Drop unencrypted frames if key is set. */
3608 if (unlikely(!(rx
->fc
& IEEE80211_FCTL_PROTECTED
) &&
3609 (rx
->fc
& IEEE80211_FCTL_FTYPE
) == IEEE80211_FTYPE_DATA
&&
3610 (rx
->fc
& IEEE80211_FCTL_STYPE
) != IEEE80211_STYPE_NULLFUNC
&&
3611 (rx
->key
|| rx
->sdata
->drop_unencrypted
) &&
3612 (rx
->sdata
->eapol
== 0 ||
3613 !ieee80211_is_eapol(rx
->skb
)))) {
3614 printk(KERN_DEBUG
"%s: RX non-WEP frame, but expected "
3615 "encryption\n", rx
->dev
->name
);
3618 return TXRX_CONTINUE
;
3622 static ieee80211_txrx_result
3623 ieee80211_rx_h_mgmt(struct ieee80211_txrx_data
*rx
)
3625 struct ieee80211_sub_if_data
*sdata
;
3627 if (!rx
->u
.rx
.ra_match
)
3630 sdata
= IEEE80211_DEV_TO_SUB_IF(rx
->dev
);
3631 if ((sdata
->type
== IEEE80211_IF_TYPE_STA
||
3632 sdata
->type
== IEEE80211_IF_TYPE_IBSS
) &&
3633 !rx
->local
->user_space_mlme
) {
3634 ieee80211_sta_rx_mgmt(rx
->dev
, rx
->skb
, rx
->u
.rx
.status
);
3636 /* Management frames are sent to hostapd for processing */
3637 if (!rx
->local
->apdev
)
3639 ieee80211_rx_mgmt(rx
->local
, rx
->skb
, rx
->u
.rx
.status
,
3640 ieee80211_msg_normal
);
3646 static ieee80211_txrx_result
3647 ieee80211_rx_h_passive_scan(struct ieee80211_txrx_data
*rx
)
3649 struct ieee80211_local
*local
= rx
->local
;
3650 struct sk_buff
*skb
= rx
->skb
;
3652 if (unlikely(local
->sta_scanning
!= 0)) {
3653 ieee80211_sta_rx_scan(rx
->dev
, skb
, rx
->u
.rx
.status
);
3657 if (unlikely(rx
->u
.rx
.in_scan
)) {
3658 /* scanning finished during invoking of handlers */
3659 I802_DEBUG_INC(local
->rx_handlers_drop_passive_scan
);
3663 return TXRX_CONTINUE
;
3667 static void ieee80211_rx_michael_mic_report(struct net_device
*dev
,
3668 struct ieee80211_hdr
*hdr
,
3669 struct sta_info
*sta
,
3670 struct ieee80211_txrx_data
*rx
)
3674 hdrlen
= ieee80211_get_hdrlen_from_skb(rx
->skb
);
3675 if (rx
->skb
->len
>= hdrlen
+ 4)
3676 keyidx
= rx
->skb
->data
[hdrlen
+ 3] >> 6;
3680 /* TODO: verify that this is not triggered by fragmented
3681 * frames (hw does not verify MIC for them). */
3682 printk(KERN_DEBUG
"%s: TKIP hwaccel reported Michael MIC "
3683 "failure from " MAC_FMT
" to " MAC_FMT
" keyidx=%d\n",
3684 dev
->name
, MAC_ARG(hdr
->addr2
), MAC_ARG(hdr
->addr1
), keyidx
);
3687 /* Some hardware versions seem to generate incorrect
3688 * Michael MIC reports; ignore them to avoid triggering
3689 * countermeasures. */
3690 printk(KERN_DEBUG
"%s: ignored spurious Michael MIC "
3691 "error for unknown address " MAC_FMT
"\n",
3692 dev
->name
, MAC_ARG(hdr
->addr2
));
3696 if (!(rx
->fc
& IEEE80211_FCTL_PROTECTED
)) {
3697 printk(KERN_DEBUG
"%s: ignored spurious Michael MIC "
3698 "error for a frame with no ISWEP flag (src "
3699 MAC_FMT
")\n", dev
->name
, MAC_ARG(hdr
->addr2
));
3703 if ((rx
->local
->hw
.flags
& IEEE80211_HW_WEP_INCLUDE_IV
) &&
3704 rx
->sdata
->type
== IEEE80211_IF_TYPE_AP
) {
3705 keyidx
= ieee80211_wep_get_keyidx(rx
->skb
);
3706 /* AP with Pairwise keys support should never receive Michael
3707 * MIC errors for non-zero keyidx because these are reserved
3708 * for group keys and only the AP is sending real multicast
3711 printk(KERN_DEBUG
"%s: ignored Michael MIC error for "
3712 "a frame with non-zero keyidx (%d) (src " MAC_FMT
3713 ")\n", dev
->name
, keyidx
, MAC_ARG(hdr
->addr2
));
3718 if ((rx
->fc
& IEEE80211_FCTL_FTYPE
) != IEEE80211_FTYPE_DATA
&&
3719 ((rx
->fc
& IEEE80211_FCTL_FTYPE
) != IEEE80211_FTYPE_MGMT
||
3720 (rx
->fc
& IEEE80211_FCTL_STYPE
) != IEEE80211_STYPE_AUTH
)) {
3721 printk(KERN_DEBUG
"%s: ignored spurious Michael MIC "
3722 "error for a frame that cannot be encrypted "
3723 "(fc=0x%04x) (src " MAC_FMT
")\n",
3724 dev
->name
, rx
->fc
, MAC_ARG(hdr
->addr2
));
3729 union iwreq_data wrqu
;
3730 char *buf
= kmalloc(128, GFP_ATOMIC
);
3734 /* TODO: needed parameters: count, key type, TSC */
3735 sprintf(buf
, "MLME-MICHAELMICFAILURE.indication("
3736 "keyid=%d %scast addr=" MAC_FMT
")",
3737 keyidx
, hdr
->addr1
[0] & 0x01 ? "broad" : "uni",
3738 MAC_ARG(hdr
->addr2
));
3739 memset(&wrqu
, 0, sizeof(wrqu
));
3740 wrqu
.data
.length
= strlen(buf
);
3741 wireless_send_event(rx
->dev
, IWEVCUSTOM
, &wrqu
, buf
);
3745 /* TODO: consider verifying the MIC error report with software
3746 * implementation if we get too many spurious reports from the
3748 if (!rx
->local
->apdev
)
3750 ieee80211_rx_mgmt(rx
->local
, rx
->skb
, rx
->u
.rx
.status
,
3751 ieee80211_msg_michael_mic_failure
);
3755 dev_kfree_skb(rx
->skb
);
3759 static inline ieee80211_txrx_result
__ieee80211_invoke_rx_handlers(
3760 struct ieee80211_local
*local
,
3761 ieee80211_rx_handler
*handlers
,
3762 struct ieee80211_txrx_data
*rx
,
3763 struct sta_info
*sta
)
3765 ieee80211_rx_handler
*handler
;
3766 ieee80211_txrx_result res
= TXRX_DROP
;
3768 for (handler
= handlers
; *handler
!= NULL
; handler
++) {
3769 res
= (*handler
)(rx
);
3770 if (res
!= TXRX_CONTINUE
) {
3771 if (res
== TXRX_DROP
) {
3772 I802_DEBUG_INC(local
->rx_handlers_drop
);
3776 if (res
== TXRX_QUEUED
)
3777 I802_DEBUG_INC(local
->rx_handlers_queued
);
3782 if (res
== TXRX_DROP
) {
3783 dev_kfree_skb(rx
->skb
);
3788 static inline void ieee80211_invoke_rx_handlers(struct ieee80211_local
*local
,
3789 ieee80211_rx_handler
*handlers
,
3790 struct ieee80211_txrx_data
*rx
,
3791 struct sta_info
*sta
)
3793 if (__ieee80211_invoke_rx_handlers(local
, handlers
, rx
, sta
) ==
3795 dev_kfree_skb(rx
->skb
);
3799 * This is the receive path handler. It is called by a low level driver when an
3800 * 802.11 MPDU is received from the hardware.
3802 void __ieee80211_rx(struct ieee80211_hw
*hw
, struct sk_buff
*skb
,
3803 struct ieee80211_rx_status
*status
)
3805 struct ieee80211_local
*local
= hw_to_local(hw
);
3806 struct ieee80211_sub_if_data
*sdata
;
3807 struct sta_info
*sta
;
3808 struct ieee80211_hdr
*hdr
;
3809 struct ieee80211_txrx_data rx
;
3812 int radiotap_len
= 0;
3814 if (status
->flag
& RX_FLAG_RADIOTAP
) {
3815 radiotap_len
= ieee80211_get_radiotap_len(skb
);
3816 skb_pull(skb
, radiotap_len
);
3819 hdr
= (struct ieee80211_hdr
*) skb
->data
;
3820 memset(&rx
, 0, sizeof(rx
));
3824 rx
.u
.rx
.status
= status
;
3825 rx
.fc
= skb
->len
>= 2 ? le16_to_cpu(hdr
->frame_control
) : 0;
3826 type
= rx
.fc
& IEEE80211_FCTL_FTYPE
;
3827 if (type
== IEEE80211_FTYPE_DATA
|| type
== IEEE80211_FTYPE_MGMT
)
3828 local
->dot11ReceivedFragmentCount
++;
3829 multicast
= is_multicast_ether_addr(hdr
->addr1
);
3832 sta
= rx
.sta
= sta_info_get(local
, hdr
->addr2
);
3834 sta
= rx
.sta
= NULL
;
3838 rx
.sdata
= IEEE80211_DEV_TO_SUB_IF(rx
.dev
);
3841 if ((status
->flag
& RX_FLAG_MMIC_ERROR
)) {
3842 ieee80211_rx_michael_mic_report(local
->mdev
, hdr
, sta
, &rx
);
3846 if (unlikely(local
->sta_scanning
))
3847 rx
.u
.rx
.in_scan
= 1;
3849 if (__ieee80211_invoke_rx_handlers(local
, local
->rx_pre_handlers
, &rx
,
3850 sta
) != TXRX_CONTINUE
)
3854 skb_push(skb
, radiotap_len
);
3855 if (sta
&& !sta
->assoc_ap
&& !(sta
->flags
& WLAN_STA_WDS
) &&
3856 !local
->iff_promiscs
&& !multicast
) {
3857 rx
.u
.rx
.ra_match
= 1;
3858 ieee80211_invoke_rx_handlers(local
, local
->rx_handlers
, &rx
,
3861 struct ieee80211_sub_if_data
*prev
= NULL
;
3862 struct sk_buff
*skb_new
;
3863 u8
*bssid
= ieee80211_get_bssid(hdr
, skb
->len
- radiotap_len
);
3865 read_lock(&local
->sub_if_lock
);
3866 list_for_each_entry(sdata
, &local
->sub_if_list
, list
) {
3867 rx
.u
.rx
.ra_match
= 1;
3868 switch (sdata
->type
) {
3869 case IEEE80211_IF_TYPE_STA
:
3872 if (!ieee80211_bssid_match(bssid
,
3873 sdata
->u
.sta
.bssid
)) {
3874 if (!rx
.u
.rx
.in_scan
)
3876 rx
.u
.rx
.ra_match
= 0;
3877 } else if (!multicast
&&
3878 compare_ether_addr(sdata
->dev
->dev_addr
,
3880 if (!sdata
->promisc
)
3882 rx
.u
.rx
.ra_match
= 0;
3885 case IEEE80211_IF_TYPE_IBSS
:
3888 if (!ieee80211_bssid_match(bssid
,
3889 sdata
->u
.sta
.bssid
)) {
3890 if (!rx
.u
.rx
.in_scan
)
3892 rx
.u
.rx
.ra_match
= 0;
3893 } else if (!multicast
&&
3894 compare_ether_addr(sdata
->dev
->dev_addr
,
3896 if (!sdata
->promisc
)
3898 rx
.u
.rx
.ra_match
= 0;
3901 ieee80211_ibss_add_sta(sdata
->dev
,
3905 case IEEE80211_IF_TYPE_AP
:
3907 if (compare_ether_addr(sdata
->dev
->dev_addr
,
3910 } else if (!ieee80211_bssid_match(bssid
,
3911 sdata
->dev
->dev_addr
)) {
3912 if (!rx
.u
.rx
.in_scan
)
3914 rx
.u
.rx
.ra_match
= 0;
3916 if (sdata
->dev
== local
->mdev
&&
3918 /* do not receive anything via
3919 * master device when not scanning */
3922 case IEEE80211_IF_TYPE_WDS
:
3924 (rx
.fc
& IEEE80211_FCTL_FTYPE
) != IEEE80211_FTYPE_DATA
)
3926 if (compare_ether_addr(sdata
->u
.wds
.remote_addr
,
3933 skb_new
= skb_copy(skb
, GFP_ATOMIC
);
3935 if (net_ratelimit())
3936 printk(KERN_DEBUG
"%s: failed to copy "
3937 "multicast frame for %s",
3938 local
->mdev
->name
, prev
->dev
->name
);
3944 ieee80211_invoke_rx_handlers(local
,
3954 ieee80211_invoke_rx_handlers(local
, local
->rx_handlers
,
3958 read_unlock(&local
->sub_if_lock
);
3965 EXPORT_SYMBOL(__ieee80211_rx
);
3967 static ieee80211_txrx_result
3968 ieee80211_tx_h_load_stats(struct ieee80211_txrx_data
*tx
)
3970 struct ieee80211_local
*local
= tx
->local
;
3971 struct ieee80211_hw_mode
*mode
= tx
->u
.tx
.mode
;
3972 struct sk_buff
*skb
= tx
->skb
;
3973 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
3974 u32 load
= 0, hdrtime
;
3976 /* TODO: this could be part of tx_status handling, so that the number
3977 * of retries would be known; TX rate should in that case be stored
3978 * somewhere with the packet */
3980 /* Estimate total channel use caused by this frame */
3982 /* 1 bit at 1 Mbit/s takes 1 usec; in channel_use values,
3983 * 1 usec = 1/8 * (1080 / 10) = 13.5 */
3985 if (mode
->mode
== MODE_IEEE80211A
||
3986 mode
->mode
== MODE_ATHEROS_TURBO
||
3987 mode
->mode
== MODE_ATHEROS_TURBOG
||
3988 (mode
->mode
== MODE_IEEE80211G
&&
3989 tx
->u
.tx
.rate
->flags
& IEEE80211_RATE_ERP
))
3990 hdrtime
= CHAN_UTIL_HDR_SHORT
;
3992 hdrtime
= CHAN_UTIL_HDR_LONG
;
3995 if (!is_multicast_ether_addr(hdr
->addr1
))
3998 if (tx
->u
.tx
.control
->flags
& IEEE80211_TXCTL_USE_RTS_CTS
)
3999 load
+= 2 * hdrtime
;
4000 else if (tx
->u
.tx
.control
->flags
& IEEE80211_TXCTL_USE_CTS_PROTECT
)
4003 load
+= skb
->len
* tx
->u
.tx
.rate
->rate_inv
;
4005 if (tx
->u
.tx
.extra_frag
) {
4007 for (i
= 0; i
< tx
->u
.tx
.num_extra_frag
; i
++) {
4008 load
+= 2 * hdrtime
;
4009 load
+= tx
->u
.tx
.extra_frag
[i
]->len
*
4010 tx
->u
.tx
.rate
->rate
;
4014 /* Divide channel_use by 8 to avoid wrapping around the counter */
4015 load
>>= CHAN_UTIL_SHIFT
;
4016 local
->channel_use_raw
+= load
;
4018 tx
->sta
->channel_use_raw
+= load
;
4019 tx
->sdata
->channel_use_raw
+= load
;
4021 return TXRX_CONTINUE
;
4025 static ieee80211_txrx_result
4026 ieee80211_rx_h_load_stats(struct ieee80211_txrx_data
*rx
)
4028 struct ieee80211_local
*local
= rx
->local
;
4029 struct sk_buff
*skb
= rx
->skb
;
4030 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
4031 u32 load
= 0, hdrtime
;
4032 struct ieee80211_rate
*rate
;
4033 struct ieee80211_hw_mode
*mode
= local
->hw
.conf
.mode
;
4036 /* Estimate total channel use caused by this frame */
4038 if (unlikely(mode
->num_rates
< 0))
4039 return TXRX_CONTINUE
;
4041 rate
= &mode
->rates
[0];
4042 for (i
= 0; i
< mode
->num_rates
; i
++) {
4043 if (mode
->rates
[i
].val
== rx
->u
.rx
.status
->rate
) {
4044 rate
= &mode
->rates
[i
];
4049 /* 1 bit at 1 Mbit/s takes 1 usec; in channel_use values,
4050 * 1 usec = 1/8 * (1080 / 10) = 13.5 */
4052 if (mode
->mode
== MODE_IEEE80211A
||
4053 mode
->mode
== MODE_ATHEROS_TURBO
||
4054 mode
->mode
== MODE_ATHEROS_TURBOG
||
4055 (mode
->mode
== MODE_IEEE80211G
&&
4056 rate
->flags
& IEEE80211_RATE_ERP
))
4057 hdrtime
= CHAN_UTIL_HDR_SHORT
;
4059 hdrtime
= CHAN_UTIL_HDR_LONG
;
4062 if (!is_multicast_ether_addr(hdr
->addr1
))
4065 load
+= skb
->len
* rate
->rate_inv
;
4067 /* Divide channel_use by 8 to avoid wrapping around the counter */
4068 load
>>= CHAN_UTIL_SHIFT
;
4069 local
->channel_use_raw
+= load
;
4071 rx
->sta
->channel_use_raw
+= load
;
4072 rx
->u
.rx
.load
= load
;
4074 return TXRX_CONTINUE
;
4077 static ieee80211_txrx_result
4078 ieee80211_rx_h_if_stats(struct ieee80211_txrx_data
*rx
)
4080 rx
->sdata
->channel_use_raw
+= rx
->u
.rx
.load
;
4081 return TXRX_CONTINUE
;
4084 static void ieee80211_stat_refresh(unsigned long data
)
4086 struct ieee80211_local
*local
= (struct ieee80211_local
*) data
;
4087 struct sta_info
*sta
;
4088 struct ieee80211_sub_if_data
*sdata
;
4090 if (!local
->stat_time
)
4093 /* go through all stations */
4094 spin_lock_bh(&local
->sta_lock
);
4095 list_for_each_entry(sta
, &local
->sta_list
, list
) {
4096 sta
->channel_use
= (sta
->channel_use_raw
/ local
->stat_time
) /
4098 sta
->channel_use_raw
= 0;
4100 spin_unlock_bh(&local
->sta_lock
);
4102 /* go through all subinterfaces */
4103 read_lock(&local
->sub_if_lock
);
4104 list_for_each_entry(sdata
, &local
->sub_if_list
, list
) {
4105 sdata
->channel_use
= (sdata
->channel_use_raw
/
4106 local
->stat_time
) / CHAN_UTIL_PER_10MS
;
4107 sdata
->channel_use_raw
= 0;
4109 read_unlock(&local
->sub_if_lock
);
4111 /* hardware interface */
4112 local
->channel_use
= (local
->channel_use_raw
/
4113 local
->stat_time
) / CHAN_UTIL_PER_10MS
;
4114 local
->channel_use_raw
= 0;
4116 local
->stat_timer
.expires
= jiffies
+ HZ
* local
->stat_time
/ 100;
4117 add_timer(&local
->stat_timer
);
4121 /* This is a version of the rx handler that can be called from hard irq
4122 * context. Post the skb on the queue and schedule the tasklet */
4123 void ieee80211_rx_irqsafe(struct ieee80211_hw
*hw
, struct sk_buff
*skb
,
4124 struct ieee80211_rx_status
*status
)
4126 struct ieee80211_local
*local
= hw_to_local(hw
);
4128 BUILD_BUG_ON(sizeof(struct ieee80211_rx_status
) > sizeof(skb
->cb
));
4130 skb
->dev
= local
->mdev
;
4131 /* copy status into skb->cb for use by tasklet */
4132 memcpy(skb
->cb
, status
, sizeof(*status
));
4133 skb
->pkt_type
= IEEE80211_RX_MSG
;
4134 skb_queue_tail(&local
->skb_queue
, skb
);
4135 tasklet_schedule(&local
->tasklet
);
4137 EXPORT_SYMBOL(ieee80211_rx_irqsafe
);
4139 void ieee80211_tx_status_irqsafe(struct ieee80211_hw
*hw
,
4140 struct sk_buff
*skb
,
4141 struct ieee80211_tx_status
*status
)
4143 struct ieee80211_local
*local
= hw_to_local(hw
);
4144 struct ieee80211_tx_status
*saved
;
4147 skb
->dev
= local
->mdev
;
4148 saved
= kmalloc(sizeof(struct ieee80211_tx_status
), GFP_ATOMIC
);
4149 if (unlikely(!saved
)) {
4150 if (net_ratelimit())
4151 printk(KERN_WARNING
"%s: Not enough memory, "
4152 "dropping tx status", skb
->dev
->name
);
4153 /* should be dev_kfree_skb_irq, but due to this function being
4154 * named _irqsafe instead of just _irq we can't be sure that
4155 * people won't call it from non-irq contexts */
4156 dev_kfree_skb_any(skb
);
4159 memcpy(saved
, status
, sizeof(struct ieee80211_tx_status
));
4160 /* copy pointer to saved status into skb->cb for use by tasklet */
4161 memcpy(skb
->cb
, &saved
, sizeof(saved
));
4163 skb
->pkt_type
= IEEE80211_TX_STATUS_MSG
;
4164 skb_queue_tail(status
->control
.flags
& IEEE80211_TXCTL_REQ_TX_STATUS
?
4165 &local
->skb_queue
: &local
->skb_queue_unreliable
, skb
);
4166 tmp
= skb_queue_len(&local
->skb_queue
) +
4167 skb_queue_len(&local
->skb_queue_unreliable
);
4168 while (tmp
> IEEE80211_IRQSAFE_QUEUE_LIMIT
&&
4169 (skb
= skb_dequeue(&local
->skb_queue_unreliable
))) {
4170 memcpy(&saved
, skb
->cb
, sizeof(saved
));
4172 dev_kfree_skb_irq(skb
);
4174 I802_DEBUG_INC(local
->tx_status_drop
);
4176 tasklet_schedule(&local
->tasklet
);
4178 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe
);
4180 static void ieee80211_tasklet_handler(unsigned long data
)
4182 struct ieee80211_local
*local
= (struct ieee80211_local
*) data
;
4183 struct sk_buff
*skb
;
4184 struct ieee80211_rx_status rx_status
;
4185 struct ieee80211_tx_status
*tx_status
;
4187 while ((skb
= skb_dequeue(&local
->skb_queue
)) ||
4188 (skb
= skb_dequeue(&local
->skb_queue_unreliable
))) {
4189 switch (skb
->pkt_type
) {
4190 case IEEE80211_RX_MSG
:
4191 /* status is in skb->cb */
4192 memcpy(&rx_status
, skb
->cb
, sizeof(rx_status
));
4193 /* Clear skb->type in order to not confuse kernel
4196 __ieee80211_rx(local_to_hw(local
), skb
, &rx_status
);
4198 case IEEE80211_TX_STATUS_MSG
:
4199 /* get pointer to saved status out of skb->cb */
4200 memcpy(&tx_status
, skb
->cb
, sizeof(tx_status
));
4202 ieee80211_tx_status(local_to_hw(local
),
4206 default: /* should never get here! */
4207 printk(KERN_ERR
"%s: Unknown message type (%d)\n",
4208 local
->mdev
->name
, skb
->pkt_type
);
4216 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
4217 * make a prepared TX frame (one that has been given to hw) to look like brand
4218 * new IEEE 802.11 frame that is ready to go through TX processing again.
4219 * Also, tx_packet_data in cb is restored from tx_control. */
4220 static void ieee80211_remove_tx_extra(struct ieee80211_local
*local
,
4221 struct ieee80211_key
*key
,
4222 struct sk_buff
*skb
,
4223 struct ieee80211_tx_control
*control
)
4225 int hdrlen
, iv_len
, mic_len
;
4226 struct ieee80211_tx_packet_data
*pkt_data
;
4228 pkt_data
= (struct ieee80211_tx_packet_data
*)skb
->cb
;
4229 pkt_data
->ifindex
= control
->ifindex
;
4230 pkt_data
->mgmt_iface
= (control
->type
== IEEE80211_IF_TYPE_MGMT
);
4231 pkt_data
->req_tx_status
= !!(control
->flags
& IEEE80211_TXCTL_REQ_TX_STATUS
);
4232 pkt_data
->do_not_encrypt
= !!(control
->flags
& IEEE80211_TXCTL_DO_NOT_ENCRYPT
);
4233 pkt_data
->requeue
= !!(control
->flags
& IEEE80211_TXCTL_REQUEUE
);
4234 pkt_data
->queue
= control
->queue
;
4236 hdrlen
= ieee80211_get_hdrlen_from_skb(skb
);
4243 iv_len
= WEP_IV_LEN
;
4244 mic_len
= WEP_ICV_LEN
;
4247 iv_len
= TKIP_IV_LEN
;
4248 mic_len
= TKIP_ICV_LEN
;
4251 iv_len
= CCMP_HDR_LEN
;
4252 mic_len
= CCMP_MIC_LEN
;
4258 if (skb
->len
>= mic_len
&& key
->force_sw_encrypt
)
4259 skb_trim(skb
, skb
->len
- mic_len
);
4260 if (skb
->len
>= iv_len
&& skb
->len
> hdrlen
) {
4261 memmove(skb
->data
+ iv_len
, skb
->data
, hdrlen
);
4262 skb_pull(skb
, iv_len
);
4267 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
4268 u16 fc
= le16_to_cpu(hdr
->frame_control
);
4269 if ((fc
& 0x8C) == 0x88) /* QoS Control Field */ {
4270 fc
&= ~IEEE80211_STYPE_QOS_DATA
;
4271 hdr
->frame_control
= cpu_to_le16(fc
);
4272 memmove(skb
->data
+ 2, skb
->data
, hdrlen
- 2);
4279 void ieee80211_tx_status(struct ieee80211_hw
*hw
, struct sk_buff
*skb
,
4280 struct ieee80211_tx_status
*status
)
4282 struct sk_buff
*skb2
;
4283 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*) skb
->data
;
4284 struct ieee80211_local
*local
= hw_to_local(hw
);
4290 "%s: ieee80211_tx_status called with NULL status\n",
4296 if (status
->excessive_retries
) {
4297 struct sta_info
*sta
;
4298 sta
= sta_info_get(local
, hdr
->addr1
);
4300 if (sta
->flags
& WLAN_STA_PS
) {
4301 /* The STA is in power save mode, so assume
4302 * that this TX packet failed because of that.
4304 status
->excessive_retries
= 0;
4305 status
->flags
|= IEEE80211_TX_STATUS_TX_FILTERED
;
4311 if (status
->flags
& IEEE80211_TX_STATUS_TX_FILTERED
) {
4312 struct sta_info
*sta
;
4313 sta
= sta_info_get(local
, hdr
->addr1
);
4315 sta
->tx_filtered_count
++;
4317 /* Clear the TX filter mask for this STA when sending
4318 * the next packet. If the STA went to power save mode,
4319 * this will happen when it is waking up for the next
4321 sta
->clear_dst_mask
= 1;
4323 /* TODO: Is the WLAN_STA_PS flag always set here or is
4324 * the race between RX and TX status causing some
4325 * packets to be filtered out before 80211.o gets an
4326 * update for PS status? This seems to be the case, so
4327 * no changes are likely to be needed. */
4328 if (sta
->flags
& WLAN_STA_PS
&&
4329 skb_queue_len(&sta
->tx_filtered
) <
4330 STA_MAX_TX_BUFFER
) {
4331 ieee80211_remove_tx_extra(local
, sta
->key
,
4334 skb_queue_tail(&sta
->tx_filtered
, skb
);
4335 } else if (!(sta
->flags
& WLAN_STA_PS
) &&
4336 !(status
->control
.flags
& IEEE80211_TXCTL_REQUEUE
)) {
4337 /* Software retry the packet once */
4338 status
->control
.flags
|= IEEE80211_TXCTL_REQUEUE
;
4339 ieee80211_remove_tx_extra(local
, sta
->key
,
4342 dev_queue_xmit(skb
);
4344 if (net_ratelimit()) {
4345 printk(KERN_DEBUG
"%s: dropped TX "
4346 "filtered frame queue_len=%d "
4351 !!(sta
->flags
& WLAN_STA_PS
),
4360 /* FIXME: STUPID to call this with both local and local->mdev */
4361 rate_control_tx_status(local
, local
->mdev
, skb
, status
);
4364 ieee80211_led_tx(local
, 0);
4367 * Fragments are passed to low-level drivers as separate skbs, so these
4368 * are actually fragments, not frames. Update frame counters only for
4369 * the first fragment of the frame. */
4371 frag
= le16_to_cpu(hdr
->seq_ctrl
) & IEEE80211_SCTL_FRAG
;
4372 type
= le16_to_cpu(hdr
->frame_control
) & IEEE80211_FCTL_FTYPE
;
4374 if (status
->flags
& IEEE80211_TX_STATUS_ACK
) {
4376 local
->dot11TransmittedFrameCount
++;
4377 if (is_multicast_ether_addr(hdr
->addr1
))
4378 local
->dot11MulticastTransmittedFrameCount
++;
4379 if (status
->retry_count
> 0)
4380 local
->dot11RetryCount
++;
4381 if (status
->retry_count
> 1)
4382 local
->dot11MultipleRetryCount
++;
4385 /* This counter shall be incremented for an acknowledged MPDU
4386 * with an individual address in the address 1 field or an MPDU
4387 * with a multicast address in the address 1 field of type Data
4389 if (!is_multicast_ether_addr(hdr
->addr1
) ||
4390 type
== IEEE80211_FTYPE_DATA
||
4391 type
== IEEE80211_FTYPE_MGMT
)
4392 local
->dot11TransmittedFragmentCount
++;
4395 local
->dot11FailedCount
++;
4398 if (!(status
->control
.flags
& IEEE80211_TXCTL_REQ_TX_STATUS
)
4399 || unlikely(!local
->apdev
)) {
4404 msg_type
= (status
->flags
& IEEE80211_TX_STATUS_ACK
) ?
4405 ieee80211_msg_tx_callback_ack
: ieee80211_msg_tx_callback_fail
;
4407 /* skb was the original skb used for TX. Clone it and give the clone
4408 * to netif_rx(). Free original skb. */
4409 skb2
= skb_copy(skb
, GFP_ATOMIC
);
4417 /* Send frame to hostapd */
4418 ieee80211_rx_mgmt(local
, skb
, NULL
, msg_type
);
4420 EXPORT_SYMBOL(ieee80211_tx_status
);
4422 /* TODO: implement register/unregister functions for adding TX/RX handlers
4423 * into ordered list */
4425 /* rx_pre handlers don't have dev and sdata fields available in
4426 * ieee80211_txrx_data */
4427 static ieee80211_rx_handler ieee80211_rx_pre_handlers
[] =
4429 ieee80211_rx_h_parse_qos
,
4430 ieee80211_rx_h_load_stats
,
4434 static ieee80211_rx_handler ieee80211_rx_handlers
[] =
4436 ieee80211_rx_h_if_stats
,
4437 ieee80211_rx_h_monitor
,
4438 ieee80211_rx_h_passive_scan
,
4439 ieee80211_rx_h_check
,
4440 ieee80211_rx_h_sta_process
,
4441 ieee80211_rx_h_ccmp_decrypt
,
4442 ieee80211_rx_h_tkip_decrypt
,
4443 ieee80211_rx_h_wep_weak_iv_detection
,
4444 ieee80211_rx_h_wep_decrypt
,
4445 ieee80211_rx_h_defragment
,
4446 ieee80211_rx_h_ps_poll
,
4447 ieee80211_rx_h_michael_mic_verify
,
4448 /* this must be after decryption - so header is counted in MPDU mic
4449 * must be before pae and data, so QOS_DATA format frames
4450 * are not passed to user space by these functions
4452 ieee80211_rx_h_remove_qos_control
,
4453 ieee80211_rx_h_802_1x_pae
,
4454 ieee80211_rx_h_drop_unencrypted
,
4455 ieee80211_rx_h_data
,
4456 ieee80211_rx_h_mgmt
,
4460 static ieee80211_tx_handler ieee80211_tx_handlers
[] =
4462 ieee80211_tx_h_check_assoc
,
4463 ieee80211_tx_h_sequence
,
4464 ieee80211_tx_h_ps_buf
,
4465 ieee80211_tx_h_select_key
,
4466 ieee80211_tx_h_michael_mic_add
,
4467 ieee80211_tx_h_fragment
,
4468 ieee80211_tx_h_tkip_encrypt
,
4469 ieee80211_tx_h_ccmp_encrypt
,
4470 ieee80211_tx_h_wep_encrypt
,
4471 ieee80211_tx_h_rate_ctrl
,
4472 ieee80211_tx_h_misc
,
4473 ieee80211_tx_h_load_stats
,
4478 int ieee80211_if_update_wds(struct net_device
*dev
, u8
*remote_addr
)
4480 struct ieee80211_local
*local
= wdev_priv(dev
->ieee80211_ptr
);
4481 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
4482 struct sta_info
*sta
;
4484 if (compare_ether_addr(remote_addr
, sdata
->u
.wds
.remote_addr
) == 0)
4487 /* Create STA entry for the new peer */
4488 sta
= sta_info_add(local
, dev
, remote_addr
, GFP_KERNEL
);
4493 /* Remove STA entry for the old peer */
4494 sta
= sta_info_get(local
, sdata
->u
.wds
.remote_addr
);
4497 sta_info_free(sta
, 0);
4499 printk(KERN_DEBUG
"%s: could not find STA entry for WDS link "
4500 "peer " MAC_FMT
"\n",
4501 dev
->name
, MAC_ARG(sdata
->u
.wds
.remote_addr
));
4504 /* Update WDS link data */
4505 memcpy(&sdata
->u
.wds
.remote_addr
, remote_addr
, ETH_ALEN
);
4510 /* Must not be called for mdev and apdev */
4511 void ieee80211_if_setup(struct net_device
*dev
)
4514 dev
->hard_start_xmit
= ieee80211_subif_start_xmit
;
4515 dev
->wireless_handlers
= &ieee80211_iw_handler_def
;
4516 dev
->set_multicast_list
= ieee80211_set_multicast_list
;
4517 dev
->change_mtu
= ieee80211_change_mtu
;
4518 dev
->get_stats
= ieee80211_get_stats
;
4519 dev
->open
= ieee80211_open
;
4520 dev
->stop
= ieee80211_stop
;
4521 dev
->uninit
= ieee80211_if_reinit
;
4522 dev
->destructor
= ieee80211_if_free
;
4525 void ieee80211_if_mgmt_setup(struct net_device
*dev
)
4528 dev
->hard_start_xmit
= ieee80211_mgmt_start_xmit
;
4529 dev
->change_mtu
= ieee80211_change_mtu_apdev
;
4530 dev
->get_stats
= ieee80211_get_stats
;
4531 dev
->open
= ieee80211_mgmt_open
;
4532 dev
->stop
= ieee80211_mgmt_stop
;
4533 dev
->type
= ARPHRD_IEEE80211_PRISM
;
4534 dev
->hard_header_parse
= header_parse_80211
;
4535 dev
->uninit
= ieee80211_if_reinit
;
4536 dev
->destructor
= ieee80211_if_free
;
4539 int ieee80211_init_rate_ctrl_alg(struct ieee80211_local
*local
,
4542 struct rate_control_ref
*ref
, *old
;
4545 if (local
->open_count
|| netif_running(local
->mdev
) ||
4546 (local
->apdev
&& netif_running(local
->apdev
)))
4549 ref
= rate_control_alloc(name
, local
);
4551 printk(KERN_WARNING
"%s: Failed to select rate control "
4552 "algorithm\n", local
->mdev
->name
);
4556 old
= local
->rate_ctrl
;
4557 local
->rate_ctrl
= ref
;
4559 rate_control_put(old
);
4560 sta_info_flush(local
, NULL
);
4563 printk(KERN_DEBUG
"%s: Selected rate control "
4564 "algorithm '%s'\n", local
->mdev
->name
,
4571 static void rate_control_deinitialize(struct ieee80211_local
*local
)
4573 struct rate_control_ref
*ref
;
4575 ref
= local
->rate_ctrl
;
4576 local
->rate_ctrl
= NULL
;
4577 rate_control_put(ref
);
4580 struct ieee80211_hw
*ieee80211_alloc_hw(size_t priv_data_len
,
4581 const struct ieee80211_ops
*ops
)
4583 struct net_device
*mdev
;
4584 struct ieee80211_local
*local
;
4585 struct ieee80211_sub_if_data
*sdata
;
4587 struct wiphy
*wiphy
;
4589 /* Ensure 32-byte alignment of our private data and hw private data.
4590 * We use the wiphy priv data for both our ieee80211_local and for
4591 * the driver's private data
4593 * In memory it'll be like this:
4595 * +-------------------------+
4597 * +-------------------------+
4598 * | struct ieee80211_local |
4599 * +-------------------------+
4600 * | driver's private data |
4601 * +-------------------------+
4604 priv_size
= ((sizeof(struct ieee80211_local
) +
4605 NETDEV_ALIGN_CONST
) & ~NETDEV_ALIGN_CONST
) +
4608 wiphy
= wiphy_new(&mac80211_config_ops
, priv_size
);
4613 wiphy
->privid
= mac80211_wiphy_privid
;
4615 local
= wiphy_priv(wiphy
);
4616 local
->hw
.wiphy
= wiphy
;
4618 local
->hw
.priv
= (char *)local
+
4619 ((sizeof(struct ieee80211_local
) +
4620 NETDEV_ALIGN_CONST
) & ~NETDEV_ALIGN_CONST
);
4624 /* for now, mdev needs sub_if_data :/ */
4625 mdev
= alloc_netdev(sizeof(struct ieee80211_sub_if_data
),
4626 "wmaster%d", ether_setup
);
4632 sdata
= IEEE80211_DEV_TO_SUB_IF(mdev
);
4633 mdev
->ieee80211_ptr
= &sdata
->wdev
;
4634 sdata
->wdev
.wiphy
= wiphy
;
4636 local
->hw
.queues
= 1; /* default */
4639 local
->rx_pre_handlers
= ieee80211_rx_pre_handlers
;
4640 local
->rx_handlers
= ieee80211_rx_handlers
;
4641 local
->tx_handlers
= ieee80211_tx_handlers
;
4643 local
->bridge_packets
= 1;
4645 local
->rts_threshold
= IEEE80211_MAX_RTS_THRESHOLD
;
4646 local
->fragmentation_threshold
= IEEE80211_MAX_FRAG_THRESHOLD
;
4647 local
->short_retry_limit
= 7;
4648 local
->long_retry_limit
= 4;
4649 local
->hw
.conf
.radio_enabled
= 1;
4650 local
->rate_ctrl_num_up
= RATE_CONTROL_NUM_UP
;
4651 local
->rate_ctrl_num_down
= RATE_CONTROL_NUM_DOWN
;
4653 local
->enabled_modes
= (unsigned int) -1;
4655 INIT_LIST_HEAD(&local
->modes_list
);
4657 rwlock_init(&local
->sub_if_lock
);
4658 INIT_LIST_HEAD(&local
->sub_if_list
);
4660 INIT_DELAYED_WORK(&local
->scan_work
, ieee80211_sta_scan_work
);
4661 init_timer(&local
->stat_timer
);
4662 local
->stat_timer
.function
= ieee80211_stat_refresh
;
4663 local
->stat_timer
.data
= (unsigned long) local
;
4664 ieee80211_rx_bss_list_init(mdev
);
4666 sta_info_init(local
);
4668 mdev
->hard_start_xmit
= ieee80211_master_start_xmit
;
4669 mdev
->open
= ieee80211_master_open
;
4670 mdev
->stop
= ieee80211_master_stop
;
4671 mdev
->type
= ARPHRD_IEEE80211
;
4672 mdev
->hard_header_parse
= header_parse_80211
;
4674 sdata
->type
= IEEE80211_IF_TYPE_AP
;
4676 sdata
->local
= local
;
4677 sdata
->u
.ap
.force_unicast_rateidx
= -1;
4678 sdata
->u
.ap
.max_ratectrl_rateidx
= -1;
4679 ieee80211_if_sdata_init(sdata
);
4680 list_add_tail(&sdata
->list
, &local
->sub_if_list
);
4682 tasklet_init(&local
->tx_pending_tasklet
, ieee80211_tx_pending
,
4683 (unsigned long)local
);
4684 tasklet_disable(&local
->tx_pending_tasklet
);
4686 tasklet_init(&local
->tasklet
,
4687 ieee80211_tasklet_handler
,
4688 (unsigned long) local
);
4689 tasklet_disable(&local
->tasklet
);
4691 skb_queue_head_init(&local
->skb_queue
);
4692 skb_queue_head_init(&local
->skb_queue_unreliable
);
4694 return local_to_hw(local
);
4696 EXPORT_SYMBOL(ieee80211_alloc_hw
);
4698 int ieee80211_register_hw(struct ieee80211_hw
*hw
)
4700 struct ieee80211_local
*local
= hw_to_local(hw
);
4704 result
= wiphy_register(local
->hw
.wiphy
);
4708 name
= wiphy_dev(local
->hw
.wiphy
)->driver
->name
;
4709 local
->hw
.workqueue
= create_singlethread_workqueue(name
);
4710 if (!local
->hw
.workqueue
) {
4712 goto fail_workqueue
;
4715 debugfs_hw_add(local
);
4717 local
->hw
.conf
.beacon_int
= 1000;
4719 local
->wstats_flags
|= local
->hw
.max_rssi
?
4720 IW_QUAL_LEVEL_UPDATED
: IW_QUAL_LEVEL_INVALID
;
4721 local
->wstats_flags
|= local
->hw
.max_signal
?
4722 IW_QUAL_QUAL_UPDATED
: IW_QUAL_QUAL_INVALID
;
4723 local
->wstats_flags
|= local
->hw
.max_noise
?
4724 IW_QUAL_NOISE_UPDATED
: IW_QUAL_NOISE_INVALID
;
4725 if (local
->hw
.max_rssi
< 0 || local
->hw
.max_noise
< 0)
4726 local
->wstats_flags
|= IW_QUAL_DBM
;
4728 result
= sta_info_start(local
);
4733 result
= dev_alloc_name(local
->mdev
, local
->mdev
->name
);
4737 memcpy(local
->mdev
->dev_addr
, local
->hw
.wiphy
->perm_addr
, ETH_ALEN
);
4738 SET_NETDEV_DEV(local
->mdev
, wiphy_dev(local
->hw
.wiphy
));
4740 result
= register_netdevice(local
->mdev
);
4744 ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local
->mdev
));
4746 result
= ieee80211_init_rate_ctrl_alg(local
, NULL
);
4748 printk(KERN_DEBUG
"%s: Failed to initialize rate control "
4749 "algorithm\n", local
->mdev
->name
);
4753 result
= ieee80211_wep_init(local
);
4756 printk(KERN_DEBUG
"%s: Failed to initialize wep\n",
4761 ieee80211_install_qdisc(local
->mdev
);
4763 /* add one default STA interface */
4764 result
= ieee80211_if_add(local
->mdev
, "wlan%d", NULL
,
4765 IEEE80211_IF_TYPE_STA
);
4767 printk(KERN_WARNING
"%s: Failed to add default virtual iface\n",
4770 local
->reg_state
= IEEE80211_DEV_REGISTERED
;
4773 ieee80211_led_init(local
);
4778 rate_control_deinitialize(local
);
4780 ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local
->mdev
));
4781 unregister_netdevice(local
->mdev
);
4784 sta_info_stop(local
);
4786 debugfs_hw_del(local
);
4787 destroy_workqueue(local
->hw
.workqueue
);
4789 wiphy_unregister(local
->hw
.wiphy
);
4792 EXPORT_SYMBOL(ieee80211_register_hw
);
4794 int ieee80211_register_hwmode(struct ieee80211_hw
*hw
,
4795 struct ieee80211_hw_mode
*mode
)
4797 struct ieee80211_local
*local
= hw_to_local(hw
);
4798 struct ieee80211_rate
*rate
;
4801 INIT_LIST_HEAD(&mode
->list
);
4802 list_add_tail(&mode
->list
, &local
->modes_list
);
4804 local
->hw_modes
|= (1 << mode
->mode
);
4805 for (i
= 0; i
< mode
->num_rates
; i
++) {
4806 rate
= &(mode
->rates
[i
]);
4807 rate
->rate_inv
= CHAN_UTIL_RATE_LCM
/ rate
->rate
;
4809 ieee80211_prepare_rates(local
, mode
);
4811 if (!local
->oper_hw_mode
) {
4812 /* Default to this mode */
4813 local
->hw
.conf
.phymode
= mode
->mode
;
4814 local
->oper_hw_mode
= local
->scan_hw_mode
= mode
;
4815 local
->oper_channel
= local
->scan_channel
= &mode
->channels
[0];
4816 local
->hw
.conf
.mode
= local
->oper_hw_mode
;
4817 local
->hw
.conf
.chan
= local
->oper_channel
;
4820 if (!(hw
->flags
& IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED
))
4821 ieee80211_init_client(local
->mdev
);
4825 EXPORT_SYMBOL(ieee80211_register_hwmode
);
4827 void ieee80211_unregister_hw(struct ieee80211_hw
*hw
)
4829 struct ieee80211_local
*local
= hw_to_local(hw
);
4830 struct ieee80211_sub_if_data
*sdata
, *tmp
;
4831 struct list_head tmp_list
;
4834 tasklet_kill(&local
->tx_pending_tasklet
);
4835 tasklet_kill(&local
->tasklet
);
4839 BUG_ON(local
->reg_state
!= IEEE80211_DEV_REGISTERED
);
4841 local
->reg_state
= IEEE80211_DEV_UNREGISTERED
;
4843 ieee80211_if_del_mgmt(local
);
4845 write_lock_bh(&local
->sub_if_lock
);
4846 list_replace_init(&local
->sub_if_list
, &tmp_list
);
4847 write_unlock_bh(&local
->sub_if_lock
);
4849 list_for_each_entry_safe(sdata
, tmp
, &tmp_list
, list
)
4850 __ieee80211_if_del(local
, sdata
);
4854 if (local
->stat_time
)
4855 del_timer_sync(&local
->stat_timer
);
4857 ieee80211_rx_bss_list_deinit(local
->mdev
);
4858 ieee80211_clear_tx_pending(local
);
4859 sta_info_stop(local
);
4860 rate_control_deinitialize(local
);
4861 debugfs_hw_del(local
);
4863 for (i
= 0; i
< NUM_IEEE80211_MODES
; i
++) {
4864 kfree(local
->supp_rates
[i
]);
4865 kfree(local
->basic_rates
[i
]);
4868 if (skb_queue_len(&local
->skb_queue
)
4869 || skb_queue_len(&local
->skb_queue_unreliable
))
4870 printk(KERN_WARNING
"%s: skb_queue not empty\n",
4872 skb_queue_purge(&local
->skb_queue
);
4873 skb_queue_purge(&local
->skb_queue_unreliable
);
4875 destroy_workqueue(local
->hw
.workqueue
);
4876 wiphy_unregister(local
->hw
.wiphy
);
4877 ieee80211_wep_free(local
);
4878 ieee80211_led_exit(local
);
4880 EXPORT_SYMBOL(ieee80211_unregister_hw
);
4882 void ieee80211_free_hw(struct ieee80211_hw
*hw
)
4884 struct ieee80211_local
*local
= hw_to_local(hw
);
4886 ieee80211_if_free(local
->mdev
);
4887 wiphy_free(local
->hw
.wiphy
);
4889 EXPORT_SYMBOL(ieee80211_free_hw
);
4891 void ieee80211_wake_queue(struct ieee80211_hw
*hw
, int queue
)
4893 struct ieee80211_local
*local
= hw_to_local(hw
);
4895 if (test_and_clear_bit(IEEE80211_LINK_STATE_XOFF
,
4896 &local
->state
[queue
])) {
4897 if (test_bit(IEEE80211_LINK_STATE_PENDING
,
4898 &local
->state
[queue
]))
4899 tasklet_schedule(&local
->tx_pending_tasklet
);
4901 if (!ieee80211_qdisc_installed(local
->mdev
)) {
4903 netif_wake_queue(local
->mdev
);
4905 __netif_schedule(local
->mdev
);
4908 EXPORT_SYMBOL(ieee80211_wake_queue
);
4910 void ieee80211_stop_queue(struct ieee80211_hw
*hw
, int queue
)
4912 struct ieee80211_local
*local
= hw_to_local(hw
);
4914 if (!ieee80211_qdisc_installed(local
->mdev
) && queue
== 0)
4915 netif_stop_queue(local
->mdev
);
4916 set_bit(IEEE80211_LINK_STATE_XOFF
, &local
->state
[queue
]);
4918 EXPORT_SYMBOL(ieee80211_stop_queue
);
4920 void ieee80211_start_queues(struct ieee80211_hw
*hw
)
4922 struct ieee80211_local
*local
= hw_to_local(hw
);
4925 for (i
= 0; i
< local
->hw
.queues
; i
++)
4926 clear_bit(IEEE80211_LINK_STATE_XOFF
, &local
->state
[i
]);
4927 if (!ieee80211_qdisc_installed(local
->mdev
))
4928 netif_start_queue(local
->mdev
);
4930 EXPORT_SYMBOL(ieee80211_start_queues
);
4932 void ieee80211_stop_queues(struct ieee80211_hw
*hw
)
4936 for (i
= 0; i
< hw
->queues
; i
++)
4937 ieee80211_stop_queue(hw
, i
);
4939 EXPORT_SYMBOL(ieee80211_stop_queues
);
4941 void ieee80211_wake_queues(struct ieee80211_hw
*hw
)
4945 for (i
= 0; i
< hw
->queues
; i
++)
4946 ieee80211_wake_queue(hw
, i
);
4948 EXPORT_SYMBOL(ieee80211_wake_queues
);
4950 struct net_device_stats
*ieee80211_dev_stats(struct net_device
*dev
)
4952 struct ieee80211_sub_if_data
*sdata
;
4953 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
4954 return &sdata
->stats
;
4957 static int __init
ieee80211_init(void)
4959 struct sk_buff
*skb
;
4962 BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data
) > sizeof(skb
->cb
));
4964 ret
= ieee80211_wme_register();
4966 printk(KERN_DEBUG
"ieee80211_init: failed to "
4967 "initialize WME (err=%d)\n", ret
);
4971 ieee80211_debugfs_netdev_init();
4977 static void __exit
ieee80211_exit(void)
4979 ieee80211_wme_unregister();
4980 ieee80211_debugfs_netdev_exit();
4984 module_init(ieee80211_init
);
4985 module_exit(ieee80211_exit
);
4987 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
4988 MODULE_LICENSE("GPL");