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Commit | Line | Data |
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571ecf67 JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
84040805 | 5 | * Copyright 2007-2010 Johannes Berg <johannes@sipsolutions.net> |
571ecf67 JB |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | ||
ab46623e | 12 | #include <linux/jiffies.h> |
5a0e3ad6 | 13 | #include <linux/slab.h> |
571ecf67 JB |
14 | #include <linux/kernel.h> |
15 | #include <linux/skbuff.h> | |
16 | #include <linux/netdevice.h> | |
17 | #include <linux/etherdevice.h> | |
d4e46a3d | 18 | #include <linux/rcupdate.h> |
bc3b2d7f | 19 | #include <linux/export.h> |
571ecf67 JB |
20 | #include <net/mac80211.h> |
21 | #include <net/ieee80211_radiotap.h> | |
d26ad377 | 22 | #include <asm/unaligned.h> |
571ecf67 JB |
23 | |
24 | #include "ieee80211_i.h" | |
24487981 | 25 | #include "driver-ops.h" |
2c8dccc7 | 26 | #include "led.h" |
33b64eb2 | 27 | #include "mesh.h" |
571ecf67 JB |
28 | #include "wep.h" |
29 | #include "wpa.h" | |
30 | #include "tkip.h" | |
31 | #include "wme.h" | |
1d8d3dec | 32 | #include "rate.h" |
571ecf67 | 33 | |
b2e7771e JB |
34 | /* |
35 | * monitor mode reception | |
36 | * | |
37 | * This function cleans up the SKB, i.e. it removes all the stuff | |
38 | * only useful for monitoring. | |
39 | */ | |
40 | static struct sk_buff *remove_monitor_info(struct ieee80211_local *local, | |
0869aea0 | 41 | struct sk_buff *skb) |
b2e7771e | 42 | { |
90b9e446 JB |
43 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
44 | ||
b2e7771e JB |
45 | if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) { |
46 | if (likely(skb->len > FCS_LEN)) | |
e3cf8b3f | 47 | __pskb_trim(skb, skb->len - FCS_LEN); |
b2e7771e JB |
48 | else { |
49 | /* driver bug */ | |
50 | WARN_ON(1); | |
51 | dev_kfree_skb(skb); | |
0624760c | 52 | return NULL; |
b2e7771e JB |
53 | } |
54 | } | |
55 | ||
90b9e446 JB |
56 | if (status->vendor_radiotap_len) |
57 | __pskb_pull(skb, status->vendor_radiotap_len); | |
58 | ||
b2e7771e JB |
59 | return skb; |
60 | } | |
61 | ||
1df332e8 | 62 | static inline int should_drop_frame(struct sk_buff *skb, int present_fcs_len) |
b2e7771e | 63 | { |
f1d58c25 | 64 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
605f1a5b JB |
65 | struct ieee80211_hdr *hdr; |
66 | ||
67 | hdr = (void *)(skb->data + status->vendor_radiotap_len); | |
b2e7771e | 68 | |
4c298677 JB |
69 | if (status->flag & (RX_FLAG_FAILED_FCS_CRC | |
70 | RX_FLAG_FAILED_PLCP_CRC | | |
71 | RX_FLAG_AMPDU_IS_ZEROLEN)) | |
b2e7771e | 72 | return 1; |
605f1a5b JB |
73 | if (unlikely(skb->len < 16 + present_fcs_len + |
74 | status->vendor_radiotap_len)) | |
b2e7771e | 75 | return 1; |
87228f57 HH |
76 | if (ieee80211_is_ctl(hdr->frame_control) && |
77 | !ieee80211_is_pspoll(hdr->frame_control) && | |
78 | !ieee80211_is_back_req(hdr->frame_control)) | |
b2e7771e JB |
79 | return 1; |
80 | return 0; | |
81 | } | |
82 | ||
601ae7f2 | 83 | static int |
90b9e446 JB |
84 | ieee80211_rx_radiotap_space(struct ieee80211_local *local, |
85 | struct ieee80211_rx_status *status) | |
601ae7f2 BR |
86 | { |
87 | int len; | |
88 | ||
89 | /* always present fields */ | |
a144f378 | 90 | len = sizeof(struct ieee80211_radiotap_header) + 8; |
601ae7f2 | 91 | |
a144f378 | 92 | /* allocate extra bitmaps */ |
90b9e446 JB |
93 | if (status->vendor_radiotap_len) |
94 | len += 4; | |
a144f378 JB |
95 | if (status->chains) |
96 | len += 4 * hweight8(status->chains); | |
90b9e446 JB |
97 | |
98 | if (ieee80211_have_rx_timestamp(status)) { | |
99 | len = ALIGN(len, 8); | |
601ae7f2 | 100 | len += 8; |
90b9e446 | 101 | } |
7fee5372 | 102 | if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) |
601ae7f2 | 103 | len += 1; |
601ae7f2 | 104 | |
a144f378 JB |
105 | /* antenna field, if we don't have per-chain info */ |
106 | if (!status->chains) | |
107 | len += 1; | |
108 | ||
90b9e446 JB |
109 | /* padding for RX_FLAGS if necessary */ |
110 | len = ALIGN(len, 2); | |
601ae7f2 | 111 | |
6d744bac JB |
112 | if (status->flag & RX_FLAG_HT) /* HT info */ |
113 | len += 3; | |
114 | ||
4c298677 | 115 | if (status->flag & RX_FLAG_AMPDU_DETAILS) { |
90b9e446 | 116 | len = ALIGN(len, 4); |
4c298677 JB |
117 | len += 8; |
118 | } | |
119 | ||
51648921 JB |
120 | if (status->flag & RX_FLAG_VHT) { |
121 | len = ALIGN(len, 2); | |
122 | len += 12; | |
123 | } | |
124 | ||
a144f378 JB |
125 | if (status->chains) { |
126 | /* antenna and antenna signal fields */ | |
127 | len += 2 * hweight8(status->chains); | |
128 | } | |
129 | ||
90b9e446 JB |
130 | if (status->vendor_radiotap_len) { |
131 | if (WARN_ON_ONCE(status->vendor_radiotap_align == 0)) | |
132 | status->vendor_radiotap_align = 1; | |
133 | /* align standard part of vendor namespace */ | |
134 | len = ALIGN(len, 2); | |
135 | /* allocate standard part of vendor namespace */ | |
136 | len += 6; | |
137 | /* align vendor-defined part */ | |
138 | len = ALIGN(len, status->vendor_radiotap_align); | |
139 | /* vendor-defined part is already in skb */ | |
140 | } | |
141 | ||
601ae7f2 BR |
142 | return len; |
143 | } | |
144 | ||
00ea6deb | 145 | /* |
601ae7f2 BR |
146 | * ieee80211_add_rx_radiotap_header - add radiotap header |
147 | * | |
148 | * add a radiotap header containing all the fields which the hardware provided. | |
149 | */ | |
150 | static void | |
151 | ieee80211_add_rx_radiotap_header(struct ieee80211_local *local, | |
152 | struct sk_buff *skb, | |
601ae7f2 | 153 | struct ieee80211_rate *rate, |
973ef21a | 154 | int rtap_len, bool has_fcs) |
601ae7f2 | 155 | { |
f1d58c25 | 156 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
601ae7f2 BR |
157 | struct ieee80211_radiotap_header *rthdr; |
158 | unsigned char *pos; | |
a144f378 JB |
159 | __le32 *it_present; |
160 | u32 it_present_val; | |
6a86b9c7 | 161 | u16 rx_flags = 0; |
a5e70697 | 162 | u16 channel_flags = 0; |
a144f378 JB |
163 | int mpdulen, chain; |
164 | unsigned long chains = status->chains; | |
f4bda337 TP |
165 | |
166 | mpdulen = skb->len; | |
167 | if (!(has_fcs && (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS))) | |
168 | mpdulen += FCS_LEN; | |
601ae7f2 BR |
169 | |
170 | rthdr = (struct ieee80211_radiotap_header *)skb_push(skb, rtap_len); | |
171 | memset(rthdr, 0, rtap_len); | |
a144f378 | 172 | it_present = &rthdr->it_present; |
601ae7f2 BR |
173 | |
174 | /* radiotap header, set always present flags */ | |
90b9e446 | 175 | rthdr->it_len = cpu_to_le16(rtap_len + status->vendor_radiotap_len); |
a144f378 JB |
176 | it_present_val = BIT(IEEE80211_RADIOTAP_FLAGS) | |
177 | BIT(IEEE80211_RADIOTAP_CHANNEL) | | |
178 | BIT(IEEE80211_RADIOTAP_RX_FLAGS); | |
179 | ||
180 | if (!status->chains) | |
181 | it_present_val |= BIT(IEEE80211_RADIOTAP_ANTENNA); | |
182 | ||
183 | for_each_set_bit(chain, &chains, IEEE80211_MAX_CHAINS) { | |
184 | it_present_val |= | |
185 | BIT(IEEE80211_RADIOTAP_EXT) | | |
186 | BIT(IEEE80211_RADIOTAP_RADIOTAP_NAMESPACE); | |
187 | put_unaligned_le32(it_present_val, it_present); | |
188 | it_present++; | |
189 | it_present_val = BIT(IEEE80211_RADIOTAP_ANTENNA) | | |
190 | BIT(IEEE80211_RADIOTAP_DBM_ANTSIGNAL); | |
191 | } | |
601ae7f2 | 192 | |
90b9e446 | 193 | if (status->vendor_radiotap_len) { |
a144f378 JB |
194 | it_present_val |= BIT(IEEE80211_RADIOTAP_VENDOR_NAMESPACE) | |
195 | BIT(IEEE80211_RADIOTAP_EXT); | |
196 | put_unaligned_le32(it_present_val, it_present); | |
197 | it_present++; | |
198 | it_present_val = status->vendor_radiotap_bitmap; | |
90b9e446 JB |
199 | } |
200 | ||
a144f378 JB |
201 | put_unaligned_le32(it_present_val, it_present); |
202 | ||
203 | pos = (void *)(it_present + 1); | |
204 | ||
601ae7f2 BR |
205 | /* the order of the following fields is important */ |
206 | ||
207 | /* IEEE80211_RADIOTAP_TSFT */ | |
f4bda337 | 208 | if (ieee80211_have_rx_timestamp(status)) { |
90b9e446 JB |
209 | /* padding */ |
210 | while ((pos - (u8 *)rthdr) & 7) | |
211 | *pos++ = 0; | |
f4bda337 TP |
212 | put_unaligned_le64( |
213 | ieee80211_calculate_rx_timestamp(local, status, | |
214 | mpdulen, 0), | |
215 | pos); | |
1df332e8 | 216 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_TSFT); |
601ae7f2 BR |
217 | pos += 8; |
218 | } | |
219 | ||
220 | /* IEEE80211_RADIOTAP_FLAGS */ | |
973ef21a | 221 | if (has_fcs && (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS)) |
601ae7f2 | 222 | *pos |= IEEE80211_RADIOTAP_F_FCS; |
aae89831 JB |
223 | if (status->flag & (RX_FLAG_FAILED_FCS_CRC | RX_FLAG_FAILED_PLCP_CRC)) |
224 | *pos |= IEEE80211_RADIOTAP_F_BADFCS; | |
b4f28bbb BR |
225 | if (status->flag & RX_FLAG_SHORTPRE) |
226 | *pos |= IEEE80211_RADIOTAP_F_SHORTPRE; | |
601ae7f2 BR |
227 | pos++; |
228 | ||
229 | /* IEEE80211_RADIOTAP_RATE */ | |
5614618e | 230 | if (!rate || status->flag & (RX_FLAG_HT | RX_FLAG_VHT)) { |
0fb8ca45 | 231 | /* |
f8d1ccf1 | 232 | * Without rate information don't add it. If we have, |
38f37be2 | 233 | * MCS information is a separate field in radiotap, |
73b48099 JB |
234 | * added below. The byte here is needed as padding |
235 | * for the channel though, so initialise it to 0. | |
0fb8ca45 JM |
236 | */ |
237 | *pos = 0; | |
8d6f658e | 238 | } else { |
2103dec1 | 239 | int shift = 0; |
ebe6c7ba | 240 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE); |
2103dec1 SW |
241 | if (status->flag & RX_FLAG_10MHZ) |
242 | shift = 1; | |
243 | else if (status->flag & RX_FLAG_5MHZ) | |
244 | shift = 2; | |
245 | *pos = DIV_ROUND_UP(rate->bitrate, 5 * (1 << shift)); | |
8d6f658e | 246 | } |
601ae7f2 BR |
247 | pos++; |
248 | ||
249 | /* IEEE80211_RADIOTAP_CHANNEL */ | |
6a86b9c7 | 250 | put_unaligned_le16(status->freq, pos); |
601ae7f2 | 251 | pos += 2; |
a5e70697 SW |
252 | if (status->flag & RX_FLAG_10MHZ) |
253 | channel_flags |= IEEE80211_CHAN_HALF; | |
254 | else if (status->flag & RX_FLAG_5MHZ) | |
255 | channel_flags |= IEEE80211_CHAN_QUARTER; | |
256 | ||
601ae7f2 | 257 | if (status->band == IEEE80211_BAND_5GHZ) |
a5e70697 | 258 | channel_flags |= IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ; |
5614618e | 259 | else if (status->flag & (RX_FLAG_HT | RX_FLAG_VHT)) |
a5e70697 | 260 | channel_flags |= IEEE80211_CHAN_DYN | IEEE80211_CHAN_2GHZ; |
f8d1ccf1 | 261 | else if (rate && rate->flags & IEEE80211_RATE_ERP_G) |
a5e70697 | 262 | channel_flags |= IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ; |
f8d1ccf1 | 263 | else if (rate) |
a5e70697 | 264 | channel_flags |= IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ; |
f8d1ccf1 | 265 | else |
a5e70697 SW |
266 | channel_flags |= IEEE80211_CHAN_2GHZ; |
267 | put_unaligned_le16(channel_flags, pos); | |
601ae7f2 BR |
268 | pos += 2; |
269 | ||
270 | /* IEEE80211_RADIOTAP_DBM_ANTSIGNAL */ | |
fe8431f8 FF |
271 | if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM && |
272 | !(status->flag & RX_FLAG_NO_SIGNAL_VAL)) { | |
601ae7f2 BR |
273 | *pos = status->signal; |
274 | rthdr->it_present |= | |
275 | cpu_to_le32(1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL); | |
276 | pos++; | |
277 | } | |
278 | ||
601ae7f2 BR |
279 | /* IEEE80211_RADIOTAP_LOCK_QUALITY is missing */ |
280 | ||
a144f378 JB |
281 | if (!status->chains) { |
282 | /* IEEE80211_RADIOTAP_ANTENNA */ | |
283 | *pos = status->antenna; | |
284 | pos++; | |
285 | } | |
601ae7f2 | 286 | |
601ae7f2 BR |
287 | /* IEEE80211_RADIOTAP_DB_ANTNOISE is not used */ |
288 | ||
289 | /* IEEE80211_RADIOTAP_RX_FLAGS */ | |
290 | /* ensure 2 byte alignment for the 2 byte field as required */ | |
6a86b9c7 | 291 | if ((pos - (u8 *)rthdr) & 1) |
90b9e446 | 292 | *pos++ = 0; |
aae89831 | 293 | if (status->flag & RX_FLAG_FAILED_PLCP_CRC) |
6a86b9c7 JB |
294 | rx_flags |= IEEE80211_RADIOTAP_F_RX_BADPLCP; |
295 | put_unaligned_le16(rx_flags, pos); | |
601ae7f2 | 296 | pos += 2; |
6d744bac JB |
297 | |
298 | if (status->flag & RX_FLAG_HT) { | |
786677d1 OR |
299 | unsigned int stbc; |
300 | ||
6d744bac | 301 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS); |
ac55d2fe | 302 | *pos++ = local->hw.radiotap_mcs_details; |
6d744bac JB |
303 | *pos = 0; |
304 | if (status->flag & RX_FLAG_SHORT_GI) | |
305 | *pos |= IEEE80211_RADIOTAP_MCS_SGI; | |
306 | if (status->flag & RX_FLAG_40MHZ) | |
307 | *pos |= IEEE80211_RADIOTAP_MCS_BW_40; | |
ac55d2fe JB |
308 | if (status->flag & RX_FLAG_HT_GF) |
309 | *pos |= IEEE80211_RADIOTAP_MCS_FMT_GF; | |
786677d1 OR |
310 | stbc = (status->flag & RX_FLAG_STBC_MASK) >> RX_FLAG_STBC_SHIFT; |
311 | *pos |= stbc << IEEE80211_RADIOTAP_MCS_STBC_SHIFT; | |
6d744bac JB |
312 | pos++; |
313 | *pos++ = status->rate_idx; | |
314 | } | |
4c298677 JB |
315 | |
316 | if (status->flag & RX_FLAG_AMPDU_DETAILS) { | |
317 | u16 flags = 0; | |
318 | ||
319 | /* ensure 4 byte alignment */ | |
320 | while ((pos - (u8 *)rthdr) & 3) | |
321 | pos++; | |
322 | rthdr->it_present |= | |
323 | cpu_to_le32(1 << IEEE80211_RADIOTAP_AMPDU_STATUS); | |
324 | put_unaligned_le32(status->ampdu_reference, pos); | |
325 | pos += 4; | |
326 | if (status->flag & RX_FLAG_AMPDU_REPORT_ZEROLEN) | |
327 | flags |= IEEE80211_RADIOTAP_AMPDU_REPORT_ZEROLEN; | |
328 | if (status->flag & RX_FLAG_AMPDU_IS_ZEROLEN) | |
329 | flags |= IEEE80211_RADIOTAP_AMPDU_IS_ZEROLEN; | |
330 | if (status->flag & RX_FLAG_AMPDU_LAST_KNOWN) | |
331 | flags |= IEEE80211_RADIOTAP_AMPDU_LAST_KNOWN; | |
332 | if (status->flag & RX_FLAG_AMPDU_IS_LAST) | |
333 | flags |= IEEE80211_RADIOTAP_AMPDU_IS_LAST; | |
334 | if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_ERROR) | |
335 | flags |= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_ERR; | |
336 | if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_KNOWN) | |
337 | flags |= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_KNOWN; | |
338 | put_unaligned_le16(flags, pos); | |
339 | pos += 2; | |
340 | if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_KNOWN) | |
341 | *pos++ = status->ampdu_delimiter_crc; | |
342 | else | |
343 | *pos++ = 0; | |
344 | *pos++ = 0; | |
345 | } | |
90b9e446 | 346 | |
51648921 JB |
347 | if (status->flag & RX_FLAG_VHT) { |
348 | u16 known = local->hw.radiotap_vht_details; | |
349 | ||
350 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT); | |
351 | /* known field - how to handle 80+80? */ | |
352 | if (status->flag & RX_FLAG_80P80MHZ) | |
353 | known &= ~IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH; | |
354 | put_unaligned_le16(known, pos); | |
355 | pos += 2; | |
356 | /* flags */ | |
357 | if (status->flag & RX_FLAG_SHORT_GI) | |
358 | *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI; | |
359 | pos++; | |
360 | /* bandwidth */ | |
361 | if (status->flag & RX_FLAG_80MHZ) | |
362 | *pos++ = 4; | |
363 | else if (status->flag & RX_FLAG_80P80MHZ) | |
364 | *pos++ = 0; /* marked not known above */ | |
365 | else if (status->flag & RX_FLAG_160MHZ) | |
366 | *pos++ = 11; | |
367 | else if (status->flag & RX_FLAG_40MHZ) | |
368 | *pos++ = 1; | |
369 | else /* 20 MHz */ | |
370 | *pos++ = 0; | |
371 | /* MCS/NSS */ | |
372 | *pos = (status->rate_idx << 4) | status->vht_nss; | |
373 | pos += 4; | |
374 | /* coding field */ | |
375 | pos++; | |
376 | /* group ID */ | |
377 | pos++; | |
378 | /* partial_aid */ | |
379 | pos += 2; | |
380 | } | |
381 | ||
a144f378 JB |
382 | for_each_set_bit(chain, &chains, IEEE80211_MAX_CHAINS) { |
383 | *pos++ = status->chain_signal[chain]; | |
384 | *pos++ = chain; | |
385 | } | |
386 | ||
90b9e446 JB |
387 | if (status->vendor_radiotap_len) { |
388 | /* ensure 2 byte alignment for the vendor field as required */ | |
389 | if ((pos - (u8 *)rthdr) & 1) | |
390 | *pos++ = 0; | |
391 | *pos++ = status->vendor_radiotap_oui[0]; | |
392 | *pos++ = status->vendor_radiotap_oui[1]; | |
393 | *pos++ = status->vendor_radiotap_oui[2]; | |
394 | *pos++ = status->vendor_radiotap_subns; | |
395 | put_unaligned_le16(status->vendor_radiotap_len, pos); | |
396 | pos += 2; | |
397 | /* align the actual payload as requested */ | |
398 | while ((pos - (u8 *)rthdr) & (status->vendor_radiotap_align - 1)) | |
399 | *pos++ = 0; | |
400 | } | |
601ae7f2 BR |
401 | } |
402 | ||
b2e7771e JB |
403 | /* |
404 | * This function copies a received frame to all monitor interfaces and | |
405 | * returns a cleaned-up SKB that no longer includes the FCS nor the | |
406 | * radiotap header the driver might have added. | |
407 | */ | |
408 | static struct sk_buff * | |
409 | ieee80211_rx_monitor(struct ieee80211_local *local, struct sk_buff *origskb, | |
8318d78a | 410 | struct ieee80211_rate *rate) |
b2e7771e | 411 | { |
f1d58c25 | 412 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(origskb); |
b2e7771e | 413 | struct ieee80211_sub_if_data *sdata; |
293702a3 | 414 | int needed_headroom; |
b2e7771e JB |
415 | struct sk_buff *skb, *skb2; |
416 | struct net_device *prev_dev = NULL; | |
417 | int present_fcs_len = 0; | |
b2e7771e JB |
418 | |
419 | /* | |
420 | * First, we may need to make a copy of the skb because | |
421 | * (1) we need to modify it for radiotap (if not present), and | |
422 | * (2) the other RX handlers will modify the skb we got. | |
423 | * | |
424 | * We don't need to, of course, if we aren't going to return | |
425 | * the SKB because it has a bad FCS/PLCP checksum. | |
426 | */ | |
0869aea0 | 427 | |
b2e7771e JB |
428 | if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) |
429 | present_fcs_len = FCS_LEN; | |
430 | ||
605f1a5b JB |
431 | /* ensure hdr->frame_control and vendor radiotap data are in skb head */ |
432 | if (!pskb_may_pull(origskb, 2 + status->vendor_radiotap_len)) { | |
e3cf8b3f ZY |
433 | dev_kfree_skb(origskb); |
434 | return NULL; | |
435 | } | |
436 | ||
b2e7771e | 437 | if (!local->monitors) { |
0869aea0 | 438 | if (should_drop_frame(origskb, present_fcs_len)) { |
b2e7771e JB |
439 | dev_kfree_skb(origskb); |
440 | return NULL; | |
441 | } | |
442 | ||
0869aea0 | 443 | return remove_monitor_info(local, origskb); |
b2e7771e JB |
444 | } |
445 | ||
751413ea HS |
446 | /* room for the radiotap header based on driver features */ |
447 | needed_headroom = ieee80211_rx_radiotap_space(local, status); | |
448 | ||
0869aea0 | 449 | if (should_drop_frame(origskb, present_fcs_len)) { |
b2e7771e JB |
450 | /* only need to expand headroom if necessary */ |
451 | skb = origskb; | |
452 | origskb = NULL; | |
453 | ||
454 | /* | |
455 | * This shouldn't trigger often because most devices have an | |
456 | * RX header they pull before we get here, and that should | |
457 | * be big enough for our radiotap information. We should | |
458 | * probably export the length to drivers so that we can have | |
459 | * them allocate enough headroom to start with. | |
460 | */ | |
461 | if (skb_headroom(skb) < needed_headroom && | |
c49e5ea3 | 462 | pskb_expand_head(skb, needed_headroom, 0, GFP_ATOMIC)) { |
b2e7771e JB |
463 | dev_kfree_skb(skb); |
464 | return NULL; | |
465 | } | |
466 | } else { | |
467 | /* | |
468 | * Need to make a copy and possibly remove radiotap header | |
469 | * and FCS from the original. | |
470 | */ | |
471 | skb = skb_copy_expand(origskb, needed_headroom, 0, GFP_ATOMIC); | |
472 | ||
0869aea0 | 473 | origskb = remove_monitor_info(local, origskb); |
b2e7771e JB |
474 | |
475 | if (!skb) | |
476 | return origskb; | |
477 | } | |
478 | ||
0869aea0 | 479 | /* prepend radiotap information */ |
973ef21a FF |
480 | ieee80211_add_rx_radiotap_header(local, skb, rate, needed_headroom, |
481 | true); | |
b2e7771e | 482 | |
ce3edf6d | 483 | skb_reset_mac_header(skb); |
b2e7771e JB |
484 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
485 | skb->pkt_type = PACKET_OTHERHOST; | |
486 | skb->protocol = htons(ETH_P_802_2); | |
487 | ||
488 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
05c914fe | 489 | if (sdata->vif.type != NL80211_IFTYPE_MONITOR) |
b2e7771e JB |
490 | continue; |
491 | ||
3d30d949 MW |
492 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) |
493 | continue; | |
494 | ||
9607e6b6 | 495 | if (!ieee80211_sdata_running(sdata)) |
47846c9b JB |
496 | continue; |
497 | ||
b2e7771e JB |
498 | if (prev_dev) { |
499 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
500 | if (skb2) { | |
501 | skb2->dev = prev_dev; | |
5548a8a1 | 502 | netif_receive_skb(skb2); |
b2e7771e JB |
503 | } |
504 | } | |
505 | ||
506 | prev_dev = sdata->dev; | |
507 | sdata->dev->stats.rx_packets++; | |
508 | sdata->dev->stats.rx_bytes += skb->len; | |
509 | } | |
510 | ||
511 | if (prev_dev) { | |
512 | skb->dev = prev_dev; | |
5548a8a1 | 513 | netif_receive_skb(skb); |
b2e7771e JB |
514 | } else |
515 | dev_kfree_skb(skb); | |
516 | ||
517 | return origskb; | |
518 | } | |
519 | ||
5cf121c3 | 520 | static void ieee80211_parse_qos(struct ieee80211_rx_data *rx) |
6e0d114d | 521 | { |
238f74a2 | 522 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
554891e6 | 523 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
9e26297a | 524 | int tid, seqno_idx, security_idx; |
6e0d114d JB |
525 | |
526 | /* does the frame have a qos control field? */ | |
238f74a2 HH |
527 | if (ieee80211_is_data_qos(hdr->frame_control)) { |
528 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
6e0d114d | 529 | /* frame has qos control */ |
238f74a2 | 530 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; |
04b7dcf9 | 531 | if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) |
554891e6 | 532 | status->rx_flags |= IEEE80211_RX_AMSDU; |
9e26297a JB |
533 | |
534 | seqno_idx = tid; | |
535 | security_idx = tid; | |
6e0d114d | 536 | } else { |
1411f9b5 JB |
537 | /* |
538 | * IEEE 802.11-2007, 7.1.3.4.1 ("Sequence Number field"): | |
539 | * | |
540 | * Sequence numbers for management frames, QoS data | |
541 | * frames with a broadcast/multicast address in the | |
542 | * Address 1 field, and all non-QoS data frames sent | |
543 | * by QoS STAs are assigned using an additional single | |
544 | * modulo-4096 counter, [...] | |
545 | * | |
546 | * We also use that counter for non-QoS STAs. | |
547 | */ | |
5a306f58 | 548 | seqno_idx = IEEE80211_NUM_TIDS; |
9e26297a JB |
549 | security_idx = 0; |
550 | if (ieee80211_is_mgmt(hdr->frame_control)) | |
5a306f58 | 551 | security_idx = IEEE80211_NUM_TIDS; |
9e26297a | 552 | tid = 0; |
6e0d114d | 553 | } |
52865dfd | 554 | |
9e26297a JB |
555 | rx->seqno_idx = seqno_idx; |
556 | rx->security_idx = security_idx; | |
6e0d114d JB |
557 | /* Set skb->priority to 1d tag if highest order bit of TID is not set. |
558 | * For now, set skb->priority to 0 for other cases. */ | |
559 | rx->skb->priority = (tid > 7) ? 0 : tid; | |
38f3714d | 560 | } |
6e0d114d | 561 | |
d1c3a37c JB |
562 | /** |
563 | * DOC: Packet alignment | |
564 | * | |
565 | * Drivers always need to pass packets that are aligned to two-byte boundaries | |
566 | * to the stack. | |
567 | * | |
568 | * Additionally, should, if possible, align the payload data in a way that | |
569 | * guarantees that the contained IP header is aligned to a four-byte | |
570 | * boundary. In the case of regular frames, this simply means aligning the | |
571 | * payload to a four-byte boundary (because either the IP header is directly | |
572 | * contained, or IV/RFC1042 headers that have a length divisible by four are | |
59d9cb07 KV |
573 | * in front of it). If the payload data is not properly aligned and the |
574 | * architecture doesn't support efficient unaligned operations, mac80211 | |
575 | * will align the data. | |
d1c3a37c JB |
576 | * |
577 | * With A-MSDU frames, however, the payload data address must yield two modulo | |
578 | * four because there are 14-byte 802.3 headers within the A-MSDU frames that | |
579 | * push the IP header further back to a multiple of four again. Thankfully, the | |
580 | * specs were sane enough this time around to require padding each A-MSDU | |
581 | * subframe to a length that is a multiple of four. | |
582 | * | |
25985edc | 583 | * Padding like Atheros hardware adds which is between the 802.11 header and |
d1c3a37c JB |
584 | * the payload is not supported, the driver is required to move the 802.11 |
585 | * header to be directly in front of the payload in that case. | |
586 | */ | |
587 | static void ieee80211_verify_alignment(struct ieee80211_rx_data *rx) | |
38f3714d | 588 | { |
59d9cb07 KV |
589 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
590 | WARN_ONCE((unsigned long)rx->skb->data & 1, | |
591 | "unaligned packet at 0x%p\n", rx->skb->data); | |
d1c3a37c | 592 | #endif |
6e0d114d JB |
593 | } |
594 | ||
6368e4b1 | 595 | |
571ecf67 JB |
596 | /* rx handlers */ |
597 | ||
3cfcf6ac JM |
598 | static int ieee80211_is_unicast_robust_mgmt_frame(struct sk_buff *skb) |
599 | { | |
600 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
601 | ||
602 | if (skb->len < 24 || is_multicast_ether_addr(hdr->addr1)) | |
603 | return 0; | |
604 | ||
605 | return ieee80211_is_robust_mgmt_frame(hdr); | |
606 | } | |
607 | ||
608 | ||
609 | static int ieee80211_is_multicast_robust_mgmt_frame(struct sk_buff *skb) | |
610 | { | |
611 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
612 | ||
613 | if (skb->len < 24 || !is_multicast_ether_addr(hdr->addr1)) | |
614 | return 0; | |
615 | ||
616 | return ieee80211_is_robust_mgmt_frame(hdr); | |
617 | } | |
618 | ||
619 | ||
620 | /* Get the BIP key index from MMIE; return -1 if this is not a BIP frame */ | |
621 | static int ieee80211_get_mmie_keyidx(struct sk_buff *skb) | |
622 | { | |
623 | struct ieee80211_mgmt *hdr = (struct ieee80211_mgmt *) skb->data; | |
624 | struct ieee80211_mmie *mmie; | |
625 | ||
1df332e8 | 626 | if (skb->len < 24 + sizeof(*mmie) || !is_multicast_ether_addr(hdr->da)) |
3cfcf6ac JM |
627 | return -1; |
628 | ||
629 | if (!ieee80211_is_robust_mgmt_frame((struct ieee80211_hdr *) hdr)) | |
630 | return -1; /* not a robust management frame */ | |
631 | ||
632 | mmie = (struct ieee80211_mmie *) | |
633 | (skb->data + skb->len - sizeof(*mmie)); | |
634 | if (mmie->element_id != WLAN_EID_MMIE || | |
635 | mmie->length != sizeof(*mmie) - 2) | |
636 | return -1; | |
637 | ||
638 | return le16_to_cpu(mmie->key_id); | |
639 | } | |
640 | ||
2475b1cc MS |
641 | static int iwl80211_get_cs_keyid(const struct ieee80211_cipher_scheme *cs, |
642 | struct sk_buff *skb) | |
643 | { | |
644 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
645 | __le16 fc; | |
646 | int hdrlen; | |
647 | u8 keyid; | |
648 | ||
649 | fc = hdr->frame_control; | |
650 | hdrlen = ieee80211_hdrlen(fc); | |
651 | ||
652 | if (skb->len < hdrlen + cs->hdr_len) | |
653 | return -EINVAL; | |
654 | ||
655 | skb_copy_bits(skb, hdrlen + cs->key_idx_off, &keyid, 1); | |
656 | keyid &= cs->key_idx_mask; | |
657 | keyid >>= cs->key_idx_shift; | |
658 | ||
659 | return keyid; | |
660 | } | |
661 | ||
1df332e8 | 662 | static ieee80211_rx_result ieee80211_rx_mesh_check(struct ieee80211_rx_data *rx) |
33b64eb2 | 663 | { |
a7767f95 | 664 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
47846c9b | 665 | char *dev_addr = rx->sdata->vif.addr; |
d6d1a5a7 | 666 | |
a7767f95 | 667 | if (ieee80211_is_data(hdr->frame_control)) { |
3c5772a5 JC |
668 | if (is_multicast_ether_addr(hdr->addr1)) { |
669 | if (ieee80211_has_tods(hdr->frame_control) || | |
1df332e8 | 670 | !ieee80211_has_fromds(hdr->frame_control)) |
3c5772a5 | 671 | return RX_DROP_MONITOR; |
b203ca39 | 672 | if (ether_addr_equal(hdr->addr3, dev_addr)) |
3c5772a5 JC |
673 | return RX_DROP_MONITOR; |
674 | } else { | |
675 | if (!ieee80211_has_a4(hdr->frame_control)) | |
676 | return RX_DROP_MONITOR; | |
b203ca39 | 677 | if (ether_addr_equal(hdr->addr4, dev_addr)) |
3c5772a5 JC |
678 | return RX_DROP_MONITOR; |
679 | } | |
33b64eb2 LCC |
680 | } |
681 | ||
682 | /* If there is not an established peer link and this is not a peer link | |
683 | * establisment frame, beacon or probe, drop the frame. | |
684 | */ | |
685 | ||
57cf8043 | 686 | if (!rx->sta || sta_plink_state(rx->sta) != NL80211_PLINK_ESTAB) { |
33b64eb2 | 687 | struct ieee80211_mgmt *mgmt; |
d6d1a5a7 | 688 | |
a7767f95 | 689 | if (!ieee80211_is_mgmt(hdr->frame_control)) |
33b64eb2 LCC |
690 | return RX_DROP_MONITOR; |
691 | ||
a7767f95 | 692 | if (ieee80211_is_action(hdr->frame_control)) { |
d3aaec8a | 693 | u8 category; |
9b395bc3 JB |
694 | |
695 | /* make sure category field is present */ | |
696 | if (rx->skb->len < IEEE80211_MIN_ACTION_SIZE) | |
697 | return RX_DROP_MONITOR; | |
698 | ||
33b64eb2 | 699 | mgmt = (struct ieee80211_mgmt *)hdr; |
d3aaec8a JC |
700 | category = mgmt->u.action.category; |
701 | if (category != WLAN_CATEGORY_MESH_ACTION && | |
1df332e8 | 702 | category != WLAN_CATEGORY_SELF_PROTECTED) |
33b64eb2 | 703 | return RX_DROP_MONITOR; |
33b64eb2 | 704 | return RX_CONTINUE; |
33b64eb2 LCC |
705 | } |
706 | ||
a7767f95 HH |
707 | if (ieee80211_is_probe_req(hdr->frame_control) || |
708 | ieee80211_is_probe_resp(hdr->frame_control) || | |
71839121 JC |
709 | ieee80211_is_beacon(hdr->frame_control) || |
710 | ieee80211_is_auth(hdr->frame_control)) | |
a7767f95 HH |
711 | return RX_CONTINUE; |
712 | ||
713 | return RX_DROP_MONITOR; | |
a7767f95 HH |
714 | } |
715 | ||
902acc78 JB |
716 | return RX_CONTINUE; |
717 | } | |
33b64eb2 | 718 | |
d3b2fb53 | 719 | static void ieee80211_release_reorder_frame(struct ieee80211_sub_if_data *sdata, |
1edfb1af | 720 | struct tid_ampdu_rx *tid_agg_rx, |
f9e124fb CL |
721 | int index, |
722 | struct sk_buff_head *frames) | |
1edfb1af | 723 | { |
1edfb1af | 724 | struct sk_buff *skb = tid_agg_rx->reorder_buf[index]; |
4cfda47b | 725 | struct ieee80211_rx_status *status; |
1edfb1af | 726 | |
dd318575 JB |
727 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
728 | ||
1edfb1af JB |
729 | if (!skb) |
730 | goto no_frame; | |
731 | ||
071d9ac2 | 732 | /* release the frame from the reorder ring buffer */ |
1edfb1af JB |
733 | tid_agg_rx->stored_mpdu_num--; |
734 | tid_agg_rx->reorder_buf[index] = NULL; | |
4cfda47b CL |
735 | status = IEEE80211_SKB_RXCB(skb); |
736 | status->rx_flags |= IEEE80211_RX_DEFERRED_RELEASE; | |
f9e124fb | 737 | __skb_queue_tail(frames, skb); |
1edfb1af JB |
738 | |
739 | no_frame: | |
9a886586 | 740 | tid_agg_rx->head_seq_num = ieee80211_sn_inc(tid_agg_rx->head_seq_num); |
1edfb1af JB |
741 | } |
742 | ||
d3b2fb53 | 743 | static void ieee80211_release_reorder_frames(struct ieee80211_sub_if_data *sdata, |
1edfb1af | 744 | struct tid_ampdu_rx *tid_agg_rx, |
f9e124fb CL |
745 | u16 head_seq_num, |
746 | struct sk_buff_head *frames) | |
1edfb1af JB |
747 | { |
748 | int index; | |
749 | ||
dd318575 JB |
750 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
751 | ||
9a886586 | 752 | while (ieee80211_sn_less(tid_agg_rx->head_seq_num, head_seq_num)) { |
2e3049b7 | 753 | index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
f9e124fb CL |
754 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, index, |
755 | frames); | |
1edfb1af JB |
756 | } |
757 | } | |
758 | ||
759 | /* | |
760 | * Timeout (in jiffies) for skb's that are waiting in the RX reorder buffer. If | |
761 | * the skb was added to the buffer longer than this time ago, the earlier | |
762 | * frames that have not yet been received are assumed to be lost and the skb | |
763 | * can be released for processing. This may also release other skb's from the | |
764 | * reorder buffer if there are no additional gaps between the frames. | |
2bff8ebf CL |
765 | * |
766 | * Callers must hold tid_agg_rx->reorder_lock. | |
1edfb1af JB |
767 | */ |
768 | #define HT_RX_REORDER_BUF_TIMEOUT (HZ / 10) | |
769 | ||
d3b2fb53 | 770 | static void ieee80211_sta_reorder_release(struct ieee80211_sub_if_data *sdata, |
f9e124fb CL |
771 | struct tid_ampdu_rx *tid_agg_rx, |
772 | struct sk_buff_head *frames) | |
aa0c8636 | 773 | { |
2bff8ebf | 774 | int index, j; |
aa0c8636 | 775 | |
dd318575 JB |
776 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
777 | ||
aa0c8636 | 778 | /* release the buffer until next missing frame */ |
2e3049b7 | 779 | index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
aa0c8636 | 780 | if (!tid_agg_rx->reorder_buf[index] && |
07ae2dfc | 781 | tid_agg_rx->stored_mpdu_num) { |
aa0c8636 CL |
782 | /* |
783 | * No buffers ready to be released, but check whether any | |
784 | * frames in the reorder buffer have timed out. | |
785 | */ | |
aa0c8636 CL |
786 | int skipped = 1; |
787 | for (j = (index + 1) % tid_agg_rx->buf_size; j != index; | |
788 | j = (j + 1) % tid_agg_rx->buf_size) { | |
789 | if (!tid_agg_rx->reorder_buf[j]) { | |
790 | skipped++; | |
791 | continue; | |
792 | } | |
499fe9a4 DH |
793 | if (skipped && |
794 | !time_after(jiffies, tid_agg_rx->reorder_time[j] + | |
aa0c8636 | 795 | HT_RX_REORDER_BUF_TIMEOUT)) |
2bff8ebf | 796 | goto set_release_timer; |
aa0c8636 | 797 | |
bdcbd8e0 JB |
798 | ht_dbg_ratelimited(sdata, |
799 | "release an RX reorder frame due to timeout on earlier frames\n"); | |
f9e124fb CL |
800 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, j, |
801 | frames); | |
aa0c8636 CL |
802 | |
803 | /* | |
804 | * Increment the head seq# also for the skipped slots. | |
805 | */ | |
806 | tid_agg_rx->head_seq_num = | |
9a886586 JB |
807 | (tid_agg_rx->head_seq_num + |
808 | skipped) & IEEE80211_SN_MASK; | |
aa0c8636 CL |
809 | skipped = 0; |
810 | } | |
811 | } else while (tid_agg_rx->reorder_buf[index]) { | |
f9e124fb CL |
812 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, index, |
813 | frames); | |
2e3049b7 | 814 | index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
aa0c8636 | 815 | } |
2bff8ebf CL |
816 | |
817 | if (tid_agg_rx->stored_mpdu_num) { | |
2e3049b7 | 818 | j = index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
2bff8ebf CL |
819 | |
820 | for (; j != (index - 1) % tid_agg_rx->buf_size; | |
821 | j = (j + 1) % tid_agg_rx->buf_size) { | |
822 | if (tid_agg_rx->reorder_buf[j]) | |
823 | break; | |
824 | } | |
825 | ||
826 | set_release_timer: | |
827 | ||
828 | mod_timer(&tid_agg_rx->reorder_timer, | |
334df731 | 829 | tid_agg_rx->reorder_time[j] + 1 + |
2bff8ebf CL |
830 | HT_RX_REORDER_BUF_TIMEOUT); |
831 | } else { | |
832 | del_timer(&tid_agg_rx->reorder_timer); | |
833 | } | |
aa0c8636 CL |
834 | } |
835 | ||
1edfb1af JB |
836 | /* |
837 | * As this function belongs to the RX path it must be under | |
838 | * rcu_read_lock protection. It returns false if the frame | |
839 | * can be processed immediately, true if it was consumed. | |
840 | */ | |
d3b2fb53 | 841 | static bool ieee80211_sta_manage_reorder_buf(struct ieee80211_sub_if_data *sdata, |
1edfb1af | 842 | struct tid_ampdu_rx *tid_agg_rx, |
f9e124fb CL |
843 | struct sk_buff *skb, |
844 | struct sk_buff_head *frames) | |
1edfb1af JB |
845 | { |
846 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
847 | u16 sc = le16_to_cpu(hdr->seq_ctrl); | |
848 | u16 mpdu_seq_num = (sc & IEEE80211_SCTL_SEQ) >> 4; | |
849 | u16 head_seq_num, buf_size; | |
850 | int index; | |
2bff8ebf | 851 | bool ret = true; |
1edfb1af | 852 | |
dd318575 JB |
853 | spin_lock(&tid_agg_rx->reorder_lock); |
854 | ||
1edfb1af JB |
855 | buf_size = tid_agg_rx->buf_size; |
856 | head_seq_num = tid_agg_rx->head_seq_num; | |
857 | ||
858 | /* frame with out of date sequence number */ | |
9a886586 | 859 | if (ieee80211_sn_less(mpdu_seq_num, head_seq_num)) { |
1edfb1af | 860 | dev_kfree_skb(skb); |
2bff8ebf | 861 | goto out; |
1edfb1af JB |
862 | } |
863 | ||
864 | /* | |
865 | * If frame the sequence number exceeds our buffering window | |
866 | * size release some previous frames to make room for this one. | |
867 | */ | |
9a886586 JB |
868 | if (!ieee80211_sn_less(mpdu_seq_num, head_seq_num + buf_size)) { |
869 | head_seq_num = ieee80211_sn_inc( | |
870 | ieee80211_sn_sub(mpdu_seq_num, buf_size)); | |
1edfb1af | 871 | /* release stored frames up to new head to stack */ |
d3b2fb53 | 872 | ieee80211_release_reorder_frames(sdata, tid_agg_rx, |
f9e124fb | 873 | head_seq_num, frames); |
1edfb1af JB |
874 | } |
875 | ||
876 | /* Now the new frame is always in the range of the reordering buffer */ | |
877 | ||
2e3049b7 | 878 | index = mpdu_seq_num % tid_agg_rx->buf_size; |
1edfb1af JB |
879 | |
880 | /* check if we already stored this frame */ | |
881 | if (tid_agg_rx->reorder_buf[index]) { | |
882 | dev_kfree_skb(skb); | |
2bff8ebf | 883 | goto out; |
1edfb1af JB |
884 | } |
885 | ||
886 | /* | |
887 | * If the current MPDU is in the right order and nothing else | |
888 | * is stored we can process it directly, no need to buffer it. | |
c835b214 JB |
889 | * If it is first but there's something stored, we may be able |
890 | * to release frames after this one. | |
1edfb1af JB |
891 | */ |
892 | if (mpdu_seq_num == tid_agg_rx->head_seq_num && | |
893 | tid_agg_rx->stored_mpdu_num == 0) { | |
9a886586 JB |
894 | tid_agg_rx->head_seq_num = |
895 | ieee80211_sn_inc(tid_agg_rx->head_seq_num); | |
2bff8ebf CL |
896 | ret = false; |
897 | goto out; | |
1edfb1af JB |
898 | } |
899 | ||
900 | /* put the frame in the reordering buffer */ | |
901 | tid_agg_rx->reorder_buf[index] = skb; | |
902 | tid_agg_rx->reorder_time[index] = jiffies; | |
903 | tid_agg_rx->stored_mpdu_num++; | |
f9e124fb | 904 | ieee80211_sta_reorder_release(sdata, tid_agg_rx, frames); |
1edfb1af | 905 | |
2bff8ebf CL |
906 | out: |
907 | spin_unlock(&tid_agg_rx->reorder_lock); | |
908 | return ret; | |
1edfb1af JB |
909 | } |
910 | ||
911 | /* | |
912 | * Reorder MPDUs from A-MPDUs, keeping them on a buffer. Returns | |
913 | * true if the MPDU was buffered, false if it should be processed. | |
914 | */ | |
f9e124fb CL |
915 | static void ieee80211_rx_reorder_ampdu(struct ieee80211_rx_data *rx, |
916 | struct sk_buff_head *frames) | |
1edfb1af | 917 | { |
2569a826 JB |
918 | struct sk_buff *skb = rx->skb; |
919 | struct ieee80211_local *local = rx->local; | |
1edfb1af | 920 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
660c6a44 | 921 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
2569a826 | 922 | struct sta_info *sta = rx->sta; |
1edfb1af JB |
923 | struct tid_ampdu_rx *tid_agg_rx; |
924 | u16 sc; | |
6cc00d54 | 925 | u8 tid, ack_policy; |
1edfb1af | 926 | |
051a41fa JB |
927 | if (!ieee80211_is_data_qos(hdr->frame_control) || |
928 | is_multicast_ether_addr(hdr->addr1)) | |
2569a826 | 929 | goto dont_reorder; |
1edfb1af JB |
930 | |
931 | /* | |
932 | * filter the QoS data rx stream according to | |
933 | * STA/TID and check if this STA/TID is on aggregation | |
934 | */ | |
935 | ||
1edfb1af | 936 | if (!sta) |
2569a826 | 937 | goto dont_reorder; |
1edfb1af | 938 | |
6cc00d54 TP |
939 | ack_policy = *ieee80211_get_qos_ctl(hdr) & |
940 | IEEE80211_QOS_CTL_ACK_POLICY_MASK; | |
1edfb1af JB |
941 | tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; |
942 | ||
a87f736d JB |
943 | tid_agg_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]); |
944 | if (!tid_agg_rx) | |
945 | goto dont_reorder; | |
1edfb1af JB |
946 | |
947 | /* qos null data frames are excluded */ | |
948 | if (unlikely(hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_NULLFUNC))) | |
a87f736d | 949 | goto dont_reorder; |
1edfb1af | 950 | |
6cc00d54 TP |
951 | /* not part of a BA session */ |
952 | if (ack_policy != IEEE80211_QOS_CTL_ACK_POLICY_BLOCKACK && | |
953 | ack_policy != IEEE80211_QOS_CTL_ACK_POLICY_NORMAL) | |
954 | goto dont_reorder; | |
955 | ||
660c6a44 TP |
956 | /* not actually part of this BA session */ |
957 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) | |
958 | goto dont_reorder; | |
959 | ||
1edfb1af JB |
960 | /* new, potentially un-ordered, ampdu frame - process it */ |
961 | ||
962 | /* reset session timer */ | |
963 | if (tid_agg_rx->timeout) | |
12d3952f | 964 | tid_agg_rx->last_rx = jiffies; |
1edfb1af JB |
965 | |
966 | /* if this mpdu is fragmented - terminate rx aggregation session */ | |
967 | sc = le16_to_cpu(hdr->seq_ctrl); | |
968 | if (sc & IEEE80211_SCTL_FRAG) { | |
c1475ca9 | 969 | skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; |
344eec67 JB |
970 | skb_queue_tail(&rx->sdata->skb_queue, skb); |
971 | ieee80211_queue_work(&local->hw, &rx->sdata->work); | |
2569a826 | 972 | return; |
1edfb1af JB |
973 | } |
974 | ||
a87f736d JB |
975 | /* |
976 | * No locking needed -- we will only ever process one | |
977 | * RX packet at a time, and thus own tid_agg_rx. All | |
978 | * other code manipulating it needs to (and does) make | |
979 | * sure that we cannot get to it any more before doing | |
980 | * anything with it. | |
981 | */ | |
f9e124fb CL |
982 | if (ieee80211_sta_manage_reorder_buf(rx->sdata, tid_agg_rx, skb, |
983 | frames)) | |
2569a826 JB |
984 | return; |
985 | ||
986 | dont_reorder: | |
f9e124fb | 987 | __skb_queue_tail(frames, skb); |
1edfb1af | 988 | } |
33b64eb2 | 989 | |
49461622 | 990 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 991 | ieee80211_rx_h_check(struct ieee80211_rx_data *rx) |
571ecf67 | 992 | { |
a7767f95 | 993 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
554891e6 | 994 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
571ecf67 | 995 | |
6b0f3274 JB |
996 | /* |
997 | * Drop duplicate 802.11 retransmissions | |
998 | * (IEEE 802.11-2012: 9.3.2.10 "Duplicate detection and recovery") | |
999 | */ | |
1000 | if (rx->skb->len >= 24 && rx->sta && | |
1001 | !ieee80211_is_ctl(hdr->frame_control) && | |
1002 | !ieee80211_is_qos_nullfunc(hdr->frame_control) && | |
1003 | !is_multicast_ether_addr(hdr->addr1)) { | |
a7767f95 | 1004 | if (unlikely(ieee80211_has_retry(hdr->frame_control) && |
9e26297a | 1005 | rx->sta->last_seq_ctrl[rx->seqno_idx] == |
571ecf67 | 1006 | hdr->seq_ctrl)) { |
554891e6 | 1007 | if (status->rx_flags & IEEE80211_RX_RA_MATCH) { |
571ecf67 JB |
1008 | rx->local->dot11FrameDuplicateCount++; |
1009 | rx->sta->num_duplicates++; | |
1010 | } | |
b1f93314 | 1011 | return RX_DROP_UNUSABLE; |
0cfcefef | 1012 | } else if (!(status->flag & RX_FLAG_AMSDU_MORE)) { |
9e26297a | 1013 | rx->sta->last_seq_ctrl[rx->seqno_idx] = hdr->seq_ctrl; |
0cfcefef | 1014 | } |
571ecf67 JB |
1015 | } |
1016 | ||
571ecf67 JB |
1017 | if (unlikely(rx->skb->len < 16)) { |
1018 | I802_DEBUG_INC(rx->local->rx_handlers_drop_short); | |
e4c26add | 1019 | return RX_DROP_MONITOR; |
571ecf67 JB |
1020 | } |
1021 | ||
571ecf67 JB |
1022 | /* Drop disallowed frame classes based on STA auth/assoc state; |
1023 | * IEEE 802.11, Chap 5.5. | |
1024 | * | |
ccd7b362 JB |
1025 | * mac80211 filters only based on association state, i.e. it drops |
1026 | * Class 3 frames from not associated stations. hostapd sends | |
571ecf67 JB |
1027 | * deauth/disassoc frames when needed. In addition, hostapd is |
1028 | * responsible for filtering on both auth and assoc states. | |
1029 | */ | |
33b64eb2 | 1030 | |
902acc78 | 1031 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) |
33b64eb2 | 1032 | return ieee80211_rx_mesh_check(rx); |
33b64eb2 | 1033 | |
a7767f95 HH |
1034 | if (unlikely((ieee80211_is_data(hdr->frame_control) || |
1035 | ieee80211_is_pspoll(hdr->frame_control)) && | |
05c914fe | 1036 | rx->sdata->vif.type != NL80211_IFTYPE_ADHOC && |
1be7fe8d | 1037 | rx->sdata->vif.type != NL80211_IFTYPE_WDS && |
c2c98fde | 1038 | (!rx->sta || !test_sta_flag(rx->sta, WLAN_STA_ASSOC)))) { |
7852e361 JB |
1039 | /* |
1040 | * accept port control frames from the AP even when it's not | |
1041 | * yet marked ASSOC to prevent a race where we don't set the | |
1042 | * assoc bit quickly enough before it sends the first frame | |
1043 | */ | |
1044 | if (rx->sta && rx->sdata->vif.type == NL80211_IFTYPE_STATION && | |
2a33bee2 | 1045 | ieee80211_is_data_present(hdr->frame_control)) { |
6dbda2d0 JB |
1046 | unsigned int hdrlen; |
1047 | __be16 ethertype; | |
1048 | ||
1049 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
1050 | ||
1051 | if (rx->skb->len < hdrlen + 8) | |
1052 | return RX_DROP_MONITOR; | |
1053 | ||
1054 | skb_copy_bits(rx->skb, hdrlen + 6, ðertype, 2); | |
1055 | if (ethertype == rx->sdata->control_port_protocol) | |
2a33bee2 GE |
1056 | return RX_CONTINUE; |
1057 | } | |
21fc7560 JB |
1058 | |
1059 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP && | |
1060 | cfg80211_rx_spurious_frame(rx->sdata->dev, | |
1061 | hdr->addr2, | |
1062 | GFP_ATOMIC)) | |
1063 | return RX_DROP_UNUSABLE; | |
1064 | ||
e4c26add | 1065 | return RX_DROP_MONITOR; |
2a33bee2 | 1066 | } |
571ecf67 | 1067 | |
9ae54c84 | 1068 | return RX_CONTINUE; |
570bd537 JB |
1069 | } |
1070 | ||
1071 | ||
572e0012 KV |
1072 | static ieee80211_rx_result debug_noinline |
1073 | ieee80211_rx_h_check_more_data(struct ieee80211_rx_data *rx) | |
1074 | { | |
1075 | struct ieee80211_local *local; | |
1076 | struct ieee80211_hdr *hdr; | |
1077 | struct sk_buff *skb; | |
1078 | ||
1079 | local = rx->local; | |
1080 | skb = rx->skb; | |
1081 | hdr = (struct ieee80211_hdr *) skb->data; | |
1082 | ||
1083 | if (!local->pspolling) | |
1084 | return RX_CONTINUE; | |
1085 | ||
1086 | if (!ieee80211_has_fromds(hdr->frame_control)) | |
1087 | /* this is not from AP */ | |
1088 | return RX_CONTINUE; | |
1089 | ||
1090 | if (!ieee80211_is_data(hdr->frame_control)) | |
1091 | return RX_CONTINUE; | |
1092 | ||
1093 | if (!ieee80211_has_moredata(hdr->frame_control)) { | |
1094 | /* AP has no more frames buffered for us */ | |
1095 | local->pspolling = false; | |
1096 | return RX_CONTINUE; | |
1097 | } | |
1098 | ||
1099 | /* more data bit is set, let's request a new frame from the AP */ | |
1100 | ieee80211_send_pspoll(local, rx->sdata); | |
1101 | ||
1102 | return RX_CONTINUE; | |
1103 | } | |
1104 | ||
d012a605 | 1105 | static void sta_ps_start(struct sta_info *sta) |
571ecf67 | 1106 | { |
133b8226 | 1107 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
4571d3bf | 1108 | struct ieee80211_local *local = sdata->local; |
d012a605 | 1109 | struct ps_data *ps; |
0795af57 | 1110 | |
d012a605 MP |
1111 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || |
1112 | sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
1113 | ps = &sdata->bss->ps; | |
1114 | else | |
1115 | return; | |
1116 | ||
1117 | atomic_inc(&ps->num_sta_ps); | |
c2c98fde | 1118 | set_sta_flag(sta, WLAN_STA_PS_STA); |
d057e5a3 AN |
1119 | if (!(local->hw.flags & IEEE80211_HW_AP_LINK_PS)) |
1120 | drv_sta_notify(local, sdata, STA_NOTIFY_SLEEP, &sta->sta); | |
bdcbd8e0 JB |
1121 | ps_dbg(sdata, "STA %pM aid %d enters power save mode\n", |
1122 | sta->sta.addr, sta->sta.aid); | |
571ecf67 JB |
1123 | } |
1124 | ||
d012a605 | 1125 | static void sta_ps_end(struct sta_info *sta) |
571ecf67 | 1126 | { |
bdcbd8e0 JB |
1127 | ps_dbg(sta->sdata, "STA %pM aid %d exits power save mode\n", |
1128 | sta->sta.addr, sta->sta.aid); | |
004c872e | 1129 | |
c2c98fde | 1130 | if (test_sta_flag(sta, WLAN_STA_PS_DRIVER)) { |
bdcbd8e0 JB |
1131 | ps_dbg(sta->sdata, "STA %pM aid %d driver-ps-blocked\n", |
1132 | sta->sta.addr, sta->sta.aid); | |
af818581 JB |
1133 | return; |
1134 | } | |
1135 | ||
1136 | ieee80211_sta_ps_deliver_wakeup(sta); | |
571ecf67 JB |
1137 | } |
1138 | ||
d057e5a3 AN |
1139 | int ieee80211_sta_ps_transition(struct ieee80211_sta *sta, bool start) |
1140 | { | |
1141 | struct sta_info *sta_inf = container_of(sta, struct sta_info, sta); | |
1142 | bool in_ps; | |
1143 | ||
1144 | WARN_ON(!(sta_inf->local->hw.flags & IEEE80211_HW_AP_LINK_PS)); | |
1145 | ||
1146 | /* Don't let the same PS state be set twice */ | |
c2c98fde | 1147 | in_ps = test_sta_flag(sta_inf, WLAN_STA_PS_STA); |
d057e5a3 AN |
1148 | if ((start && in_ps) || (!start && !in_ps)) |
1149 | return -EINVAL; | |
1150 | ||
1151 | if (start) | |
d012a605 | 1152 | sta_ps_start(sta_inf); |
d057e5a3 | 1153 | else |
d012a605 | 1154 | sta_ps_end(sta_inf); |
d057e5a3 AN |
1155 | |
1156 | return 0; | |
1157 | } | |
1158 | EXPORT_SYMBOL(ieee80211_sta_ps_transition); | |
1159 | ||
47086fc5 JB |
1160 | static ieee80211_rx_result debug_noinline |
1161 | ieee80211_rx_h_uapsd_and_pspoll(struct ieee80211_rx_data *rx) | |
1162 | { | |
1163 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
1164 | struct ieee80211_hdr *hdr = (void *)rx->skb->data; | |
1165 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); | |
1166 | int tid, ac; | |
1167 | ||
1168 | if (!rx->sta || !(status->rx_flags & IEEE80211_RX_RA_MATCH)) | |
1169 | return RX_CONTINUE; | |
1170 | ||
1171 | if (sdata->vif.type != NL80211_IFTYPE_AP && | |
1172 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN) | |
1173 | return RX_CONTINUE; | |
1174 | ||
1175 | /* | |
1176 | * The device handles station powersave, so don't do anything about | |
1177 | * uAPSD and PS-Poll frames (the latter shouldn't even come up from | |
1178 | * it to mac80211 since they're handled.) | |
1179 | */ | |
1180 | if (sdata->local->hw.flags & IEEE80211_HW_AP_LINK_PS) | |
1181 | return RX_CONTINUE; | |
1182 | ||
1183 | /* | |
1184 | * Don't do anything if the station isn't already asleep. In | |
1185 | * the uAPSD case, the station will probably be marked asleep, | |
1186 | * in the PS-Poll case the station must be confused ... | |
1187 | */ | |
c2c98fde | 1188 | if (!test_sta_flag(rx->sta, WLAN_STA_PS_STA)) |
47086fc5 JB |
1189 | return RX_CONTINUE; |
1190 | ||
1191 | if (unlikely(ieee80211_is_pspoll(hdr->frame_control))) { | |
c2c98fde JB |
1192 | if (!test_sta_flag(rx->sta, WLAN_STA_SP)) { |
1193 | if (!test_sta_flag(rx->sta, WLAN_STA_PS_DRIVER)) | |
deeaee19 JB |
1194 | ieee80211_sta_ps_deliver_poll_response(rx->sta); |
1195 | else | |
c2c98fde | 1196 | set_sta_flag(rx->sta, WLAN_STA_PSPOLL); |
deeaee19 | 1197 | } |
47086fc5 JB |
1198 | |
1199 | /* Free PS Poll skb here instead of returning RX_DROP that would | |
1200 | * count as an dropped frame. */ | |
1201 | dev_kfree_skb(rx->skb); | |
1202 | ||
1203 | return RX_QUEUED; | |
1204 | } else if (!ieee80211_has_morefrags(hdr->frame_control) && | |
1205 | !(status->rx_flags & IEEE80211_RX_DEFERRED_RELEASE) && | |
1206 | ieee80211_has_pm(hdr->frame_control) && | |
1207 | (ieee80211_is_data_qos(hdr->frame_control) || | |
1208 | ieee80211_is_qos_nullfunc(hdr->frame_control))) { | |
1209 | tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; | |
1210 | ac = ieee802_1d_to_ac[tid & 7]; | |
1211 | ||
1212 | /* | |
1213 | * If this AC is not trigger-enabled do nothing. | |
1214 | * | |
1215 | * NB: This could/should check a separate bitmap of trigger- | |
1216 | * enabled queues, but for now we only implement uAPSD w/o | |
1217 | * TSPEC changes to the ACs, so they're always the same. | |
1218 | */ | |
1219 | if (!(rx->sta->sta.uapsd_queues & BIT(ac))) | |
1220 | return RX_CONTINUE; | |
1221 | ||
1222 | /* if we are in a service period, do nothing */ | |
c2c98fde | 1223 | if (test_sta_flag(rx->sta, WLAN_STA_SP)) |
47086fc5 JB |
1224 | return RX_CONTINUE; |
1225 | ||
c2c98fde | 1226 | if (!test_sta_flag(rx->sta, WLAN_STA_PS_DRIVER)) |
47086fc5 JB |
1227 | ieee80211_sta_ps_deliver_uapsd(rx->sta); |
1228 | else | |
c2c98fde | 1229 | set_sta_flag(rx->sta, WLAN_STA_UAPSD); |
47086fc5 JB |
1230 | } |
1231 | ||
1232 | return RX_CONTINUE; | |
1233 | } | |
1234 | ||
49461622 | 1235 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 1236 | ieee80211_rx_h_sta_process(struct ieee80211_rx_data *rx) |
571ecf67 JB |
1237 | { |
1238 | struct sta_info *sta = rx->sta; | |
eb9fb5b8 JB |
1239 | struct sk_buff *skb = rx->skb; |
1240 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
1241 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
ef0621e8 | 1242 | int i; |
571ecf67 JB |
1243 | |
1244 | if (!sta) | |
9ae54c84 | 1245 | return RX_CONTINUE; |
571ecf67 | 1246 | |
b291ba11 JB |
1247 | /* |
1248 | * Update last_rx only for IBSS packets which are for the current | |
e584da5e AQ |
1249 | * BSSID and for station already AUTHORIZED to avoid keeping the |
1250 | * current IBSS network alive in cases where other STAs start | |
1251 | * using different BSSID. This will also give the station another | |
1252 | * chance to restart the authentication/authorization in case | |
1253 | * something went wrong the first time. | |
b291ba11 | 1254 | */ |
05c914fe | 1255 | if (rx->sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
71364716 | 1256 | u8 *bssid = ieee80211_get_bssid(hdr, rx->skb->len, |
05c914fe | 1257 | NL80211_IFTYPE_ADHOC); |
e584da5e AQ |
1258 | if (ether_addr_equal(bssid, rx->sdata->u.ibss.bssid) && |
1259 | test_sta_flag(sta, WLAN_STA_AUTHORIZED)) { | |
571ecf67 | 1260 | sta->last_rx = jiffies; |
3af6334c FF |
1261 | if (ieee80211_is_data(hdr->frame_control)) { |
1262 | sta->last_rx_rate_idx = status->rate_idx; | |
1263 | sta->last_rx_rate_flag = status->flag; | |
5614618e | 1264 | sta->last_rx_rate_vht_nss = status->vht_nss; |
3af6334c FF |
1265 | } |
1266 | } | |
b291ba11 JB |
1267 | } else if (!is_multicast_ether_addr(hdr->addr1)) { |
1268 | /* | |
33b64eb2 LCC |
1269 | * Mesh beacons will update last_rx when if they are found to |
1270 | * match the current local configuration when processed. | |
571ecf67 | 1271 | */ |
b291ba11 | 1272 | sta->last_rx = jiffies; |
3af6334c FF |
1273 | if (ieee80211_is_data(hdr->frame_control)) { |
1274 | sta->last_rx_rate_idx = status->rate_idx; | |
1275 | sta->last_rx_rate_flag = status->flag; | |
5614618e | 1276 | sta->last_rx_rate_vht_nss = status->vht_nss; |
3af6334c | 1277 | } |
571ecf67 JB |
1278 | } |
1279 | ||
554891e6 | 1280 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
9ae54c84 | 1281 | return RX_CONTINUE; |
571ecf67 | 1282 | |
3cf335d5 KV |
1283 | if (rx->sdata->vif.type == NL80211_IFTYPE_STATION) |
1284 | ieee80211_sta_rx_notify(rx->sdata, hdr); | |
1285 | ||
571ecf67 JB |
1286 | sta->rx_fragments++; |
1287 | sta->rx_bytes += rx->skb->len; | |
fe8431f8 FF |
1288 | if (!(status->flag & RX_FLAG_NO_SIGNAL_VAL)) { |
1289 | sta->last_signal = status->signal; | |
1290 | ewma_add(&sta->avg_signal, -status->signal); | |
1291 | } | |
571ecf67 | 1292 | |
ef0621e8 FF |
1293 | if (status->chains) { |
1294 | sta->chains = status->chains; | |
1295 | for (i = 0; i < ARRAY_SIZE(status->chain_signal); i++) { | |
1296 | int signal = status->chain_signal[i]; | |
1297 | ||
1298 | if (!(status->chains & BIT(i))) | |
1299 | continue; | |
1300 | ||
1301 | sta->chain_signal_last[i] = signal; | |
1302 | ewma_add(&sta->chain_signal_avg[i], -signal); | |
1303 | } | |
1304 | } | |
1305 | ||
72eaa43a JB |
1306 | /* |
1307 | * Change STA power saving mode only at the end of a frame | |
1308 | * exchange sequence. | |
1309 | */ | |
d057e5a3 AN |
1310 | if (!(sta->local->hw.flags & IEEE80211_HW_AP_LINK_PS) && |
1311 | !ieee80211_has_morefrags(hdr->frame_control) && | |
4cfda47b | 1312 | !(status->rx_flags & IEEE80211_RX_DEFERRED_RELEASE) && |
05c914fe JB |
1313 | (rx->sdata->vif.type == NL80211_IFTYPE_AP || |
1314 | rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN)) { | |
c2c98fde | 1315 | if (test_sta_flag(sta, WLAN_STA_PS_STA)) { |
72eaa43a JB |
1316 | /* |
1317 | * Ignore doze->wake transitions that are | |
1318 | * indicated by non-data frames, the standard | |
1319 | * is unclear here, but for example going to | |
1320 | * PS mode and then scanning would cause a | |
1321 | * doze->wake transition for the probe request, | |
1322 | * and that is clearly undesirable. | |
1323 | */ | |
1324 | if (ieee80211_is_data(hdr->frame_control) && | |
1325 | !ieee80211_has_pm(hdr->frame_control)) | |
d012a605 | 1326 | sta_ps_end(sta); |
72eaa43a JB |
1327 | } else { |
1328 | if (ieee80211_has_pm(hdr->frame_control)) | |
d012a605 | 1329 | sta_ps_start(sta); |
72eaa43a | 1330 | } |
571ecf67 JB |
1331 | } |
1332 | ||
3f52b7e3 MP |
1333 | /* mesh power save support */ |
1334 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) | |
1335 | ieee80211_mps_rx_h_sta_process(sta, hdr); | |
1336 | ||
22403def JB |
1337 | /* |
1338 | * Drop (qos-)data::nullfunc frames silently, since they | |
1339 | * are used only to control station power saving mode. | |
1340 | */ | |
1341 | if (ieee80211_is_nullfunc(hdr->frame_control) || | |
1342 | ieee80211_is_qos_nullfunc(hdr->frame_control)) { | |
571ecf67 | 1343 | I802_DEBUG_INC(rx->local->rx_handlers_drop_nullfunc); |
d524215f FF |
1344 | |
1345 | /* | |
1346 | * If we receive a 4-addr nullfunc frame from a STA | |
e7f4a940 JB |
1347 | * that was not moved to a 4-addr STA vlan yet send |
1348 | * the event to userspace and for older hostapd drop | |
1349 | * the frame to the monitor interface. | |
d524215f FF |
1350 | */ |
1351 | if (ieee80211_has_a4(hdr->frame_control) && | |
1352 | (rx->sdata->vif.type == NL80211_IFTYPE_AP || | |
1353 | (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
e7f4a940 JB |
1354 | !rx->sdata->u.vlan.sta))) { |
1355 | if (!test_and_set_sta_flag(sta, WLAN_STA_4ADDR_EVENT)) | |
1356 | cfg80211_rx_unexpected_4addr_frame( | |
1357 | rx->sdata->dev, sta->sta.addr, | |
1358 | GFP_ATOMIC); | |
d524215f | 1359 | return RX_DROP_MONITOR; |
e7f4a940 | 1360 | } |
22403def JB |
1361 | /* |
1362 | * Update counter and free packet here to avoid | |
1363 | * counting this as a dropped packed. | |
1364 | */ | |
571ecf67 JB |
1365 | sta->rx_packets++; |
1366 | dev_kfree_skb(rx->skb); | |
9ae54c84 | 1367 | return RX_QUEUED; |
571ecf67 JB |
1368 | } |
1369 | ||
9ae54c84 | 1370 | return RX_CONTINUE; |
571ecf67 JB |
1371 | } /* ieee80211_rx_h_sta_process */ |
1372 | ||
86c228a7 JA |
1373 | static ieee80211_rx_result debug_noinline |
1374 | ieee80211_rx_h_decrypt(struct ieee80211_rx_data *rx) | |
1375 | { | |
1376 | struct sk_buff *skb = rx->skb; | |
1377 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
1378 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
1379 | int keyidx; | |
1380 | int hdrlen; | |
1381 | ieee80211_rx_result result = RX_DROP_UNUSABLE; | |
1382 | struct ieee80211_key *sta_ptk = NULL; | |
1383 | int mmie_keyidx = -1; | |
1384 | __le16 fc; | |
2475b1cc | 1385 | const struct ieee80211_cipher_scheme *cs = NULL; |
86c228a7 JA |
1386 | |
1387 | /* | |
1388 | * Key selection 101 | |
1389 | * | |
1390 | * There are four types of keys: | |
1391 | * - GTK (group keys) | |
1392 | * - IGTK (group keys for management frames) | |
1393 | * - PTK (pairwise keys) | |
1394 | * - STK (station-to-station pairwise keys) | |
1395 | * | |
1396 | * When selecting a key, we have to distinguish between multicast | |
1397 | * (including broadcast) and unicast frames, the latter can only | |
1398 | * use PTKs and STKs while the former always use GTKs and IGTKs. | |
1399 | * Unless, of course, actual WEP keys ("pre-RSNA") are used, then | |
1400 | * unicast frames can also use key indices like GTKs. Hence, if we | |
1401 | * don't have a PTK/STK we check the key index for a WEP key. | |
1402 | * | |
1403 | * Note that in a regular BSS, multicast frames are sent by the | |
1404 | * AP only, associated stations unicast the frame to the AP first | |
1405 | * which then multicasts it on their behalf. | |
1406 | * | |
1407 | * There is also a slight problem in IBSS mode: GTKs are negotiated | |
1408 | * with each station, that is something we don't currently handle. | |
1409 | * The spec seems to expect that one negotiates the same key with | |
1410 | * every station but there's no such requirement; VLANs could be | |
1411 | * possible. | |
1412 | */ | |
1413 | ||
1414 | /* | |
1415 | * No point in finding a key and decrypting if the frame is neither | |
1416 | * addressed to us nor a multicast frame. | |
1417 | */ | |
1418 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) | |
1419 | return RX_CONTINUE; | |
1420 | ||
1421 | /* start without a key */ | |
1422 | rx->key = NULL; | |
2475b1cc | 1423 | fc = hdr->frame_control; |
86c228a7 | 1424 | |
2475b1cc MS |
1425 | if (rx->sta) { |
1426 | int keyid = rx->sta->ptk_idx; | |
86c228a7 | 1427 | |
2475b1cc MS |
1428 | if (ieee80211_has_protected(fc) && rx->sta->cipher_scheme) { |
1429 | cs = rx->sta->cipher_scheme; | |
1430 | keyid = iwl80211_get_cs_keyid(cs, rx->skb); | |
1431 | if (unlikely(keyid < 0)) | |
1432 | return RX_DROP_UNUSABLE; | |
1433 | } | |
1434 | sta_ptk = rcu_dereference(rx->sta->ptk[keyid]); | |
1435 | } | |
86c228a7 JA |
1436 | |
1437 | if (!ieee80211_has_protected(fc)) | |
1438 | mmie_keyidx = ieee80211_get_mmie_keyidx(rx->skb); | |
1439 | ||
1440 | if (!is_multicast_ether_addr(hdr->addr1) && sta_ptk) { | |
1441 | rx->key = sta_ptk; | |
1442 | if ((status->flag & RX_FLAG_DECRYPTED) && | |
1443 | (status->flag & RX_FLAG_IV_STRIPPED)) | |
1444 | return RX_CONTINUE; | |
1445 | /* Skip decryption if the frame is not protected. */ | |
1446 | if (!ieee80211_has_protected(fc)) | |
1447 | return RX_CONTINUE; | |
1448 | } else if (mmie_keyidx >= 0) { | |
1449 | /* Broadcast/multicast robust management frame / BIP */ | |
1450 | if ((status->flag & RX_FLAG_DECRYPTED) && | |
1451 | (status->flag & RX_FLAG_IV_STRIPPED)) | |
1452 | return RX_CONTINUE; | |
1453 | ||
1454 | if (mmie_keyidx < NUM_DEFAULT_KEYS || | |
1455 | mmie_keyidx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS) | |
1456 | return RX_DROP_MONITOR; /* unexpected BIP keyidx */ | |
1457 | if (rx->sta) | |
1458 | rx->key = rcu_dereference(rx->sta->gtk[mmie_keyidx]); | |
1459 | if (!rx->key) | |
1460 | rx->key = rcu_dereference(rx->sdata->keys[mmie_keyidx]); | |
1461 | } else if (!ieee80211_has_protected(fc)) { | |
1462 | /* | |
1463 | * The frame was not protected, so skip decryption. However, we | |
1464 | * need to set rx->key if there is a key that could have been | |
1465 | * used so that the frame may be dropped if encryption would | |
1466 | * have been expected. | |
1467 | */ | |
1468 | struct ieee80211_key *key = NULL; | |
1469 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
1470 | int i; | |
1471 | ||
1472 | if (ieee80211_is_mgmt(fc) && | |
1473 | is_multicast_ether_addr(hdr->addr1) && | |
1474 | (key = rcu_dereference(rx->sdata->default_mgmt_key))) | |
1475 | rx->key = key; | |
1476 | else { | |
1477 | if (rx->sta) { | |
1478 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) { | |
1479 | key = rcu_dereference(rx->sta->gtk[i]); | |
1480 | if (key) | |
1481 | break; | |
1482 | } | |
1483 | } | |
1484 | if (!key) { | |
1485 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) { | |
1486 | key = rcu_dereference(sdata->keys[i]); | |
1487 | if (key) | |
1488 | break; | |
1489 | } | |
1490 | } | |
1491 | if (key) | |
1492 | rx->key = key; | |
1493 | } | |
1494 | return RX_CONTINUE; | |
1495 | } else { | |
1496 | u8 keyid; | |
2475b1cc | 1497 | |
86c228a7 JA |
1498 | /* |
1499 | * The device doesn't give us the IV so we won't be | |
1500 | * able to look up the key. That's ok though, we | |
1501 | * don't need to decrypt the frame, we just won't | |
1502 | * be able to keep statistics accurate. | |
1503 | * Except for key threshold notifications, should | |
1504 | * we somehow allow the driver to tell us which key | |
1505 | * the hardware used if this flag is set? | |
1506 | */ | |
1507 | if ((status->flag & RX_FLAG_DECRYPTED) && | |
1508 | (status->flag & RX_FLAG_IV_STRIPPED)) | |
1509 | return RX_CONTINUE; | |
1510 | ||
1511 | hdrlen = ieee80211_hdrlen(fc); | |
1512 | ||
2475b1cc MS |
1513 | if (cs) { |
1514 | keyidx = iwl80211_get_cs_keyid(cs, rx->skb); | |
86c228a7 | 1515 | |
2475b1cc MS |
1516 | if (unlikely(keyidx < 0)) |
1517 | return RX_DROP_UNUSABLE; | |
1518 | } else { | |
1519 | if (rx->skb->len < 8 + hdrlen) | |
1520 | return RX_DROP_UNUSABLE; /* TODO: count this? */ | |
1521 | /* | |
1522 | * no need to call ieee80211_wep_get_keyidx, | |
1523 | * it verifies a bunch of things we've done already | |
1524 | */ | |
1525 | skb_copy_bits(rx->skb, hdrlen + 3, &keyid, 1); | |
1526 | keyidx = keyid >> 6; | |
1527 | } | |
86c228a7 JA |
1528 | |
1529 | /* check per-station GTK first, if multicast packet */ | |
1530 | if (is_multicast_ether_addr(hdr->addr1) && rx->sta) | |
1531 | rx->key = rcu_dereference(rx->sta->gtk[keyidx]); | |
1532 | ||
1533 | /* if not found, try default key */ | |
1534 | if (!rx->key) { | |
1535 | rx->key = rcu_dereference(rx->sdata->keys[keyidx]); | |
1536 | ||
1537 | /* | |
1538 | * RSNA-protected unicast frames should always be | |
1539 | * sent with pairwise or station-to-station keys, | |
1540 | * but for WEP we allow using a key index as well. | |
1541 | */ | |
1542 | if (rx->key && | |
1543 | rx->key->conf.cipher != WLAN_CIPHER_SUITE_WEP40 && | |
1544 | rx->key->conf.cipher != WLAN_CIPHER_SUITE_WEP104 && | |
1545 | !is_multicast_ether_addr(hdr->addr1)) | |
1546 | rx->key = NULL; | |
1547 | } | |
1548 | } | |
1549 | ||
1550 | if (rx->key) { | |
1551 | if (unlikely(rx->key->flags & KEY_FLAG_TAINTED)) | |
1552 | return RX_DROP_MONITOR; | |
1553 | ||
1554 | rx->key->tx_rx_count++; | |
1555 | /* TODO: add threshold stuff again */ | |
1556 | } else { | |
1557 | return RX_DROP_MONITOR; | |
1558 | } | |
1559 | ||
1560 | switch (rx->key->conf.cipher) { | |
1561 | case WLAN_CIPHER_SUITE_WEP40: | |
1562 | case WLAN_CIPHER_SUITE_WEP104: | |
1563 | result = ieee80211_crypto_wep_decrypt(rx); | |
1564 | break; | |
1565 | case WLAN_CIPHER_SUITE_TKIP: | |
1566 | result = ieee80211_crypto_tkip_decrypt(rx); | |
1567 | break; | |
1568 | case WLAN_CIPHER_SUITE_CCMP: | |
1569 | result = ieee80211_crypto_ccmp_decrypt(rx); | |
1570 | break; | |
1571 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
1572 | result = ieee80211_crypto_aes_cmac_decrypt(rx); | |
1573 | break; | |
1574 | default: | |
2475b1cc | 1575 | result = ieee80211_crypto_hw_decrypt(rx); |
86c228a7 JA |
1576 | } |
1577 | ||
1578 | /* the hdr variable is invalid after the decrypt handlers */ | |
1579 | ||
1580 | /* either the frame has been decrypted or will be dropped */ | |
1581 | status->flag |= RX_FLAG_DECRYPTED; | |
1582 | ||
1583 | return result; | |
1584 | } | |
1585 | ||
571ecf67 JB |
1586 | static inline struct ieee80211_fragment_entry * |
1587 | ieee80211_reassemble_add(struct ieee80211_sub_if_data *sdata, | |
1588 | unsigned int frag, unsigned int seq, int rx_queue, | |
1589 | struct sk_buff **skb) | |
1590 | { | |
1591 | struct ieee80211_fragment_entry *entry; | |
571ecf67 | 1592 | |
571ecf67 JB |
1593 | entry = &sdata->fragments[sdata->fragment_next++]; |
1594 | if (sdata->fragment_next >= IEEE80211_FRAGMENT_MAX) | |
1595 | sdata->fragment_next = 0; | |
1596 | ||
bdcbd8e0 | 1597 | if (!skb_queue_empty(&entry->skb_list)) |
571ecf67 | 1598 | __skb_queue_purge(&entry->skb_list); |
571ecf67 JB |
1599 | |
1600 | __skb_queue_tail(&entry->skb_list, *skb); /* no need for locking */ | |
1601 | *skb = NULL; | |
1602 | entry->first_frag_time = jiffies; | |
1603 | entry->seq = seq; | |
1604 | entry->rx_queue = rx_queue; | |
1605 | entry->last_frag = frag; | |
1606 | entry->ccmp = 0; | |
1607 | entry->extra_len = 0; | |
1608 | ||
1609 | return entry; | |
1610 | } | |
1611 | ||
1612 | static inline struct ieee80211_fragment_entry * | |
1613 | ieee80211_reassemble_find(struct ieee80211_sub_if_data *sdata, | |
b73d70ad | 1614 | unsigned int frag, unsigned int seq, |
571ecf67 JB |
1615 | int rx_queue, struct ieee80211_hdr *hdr) |
1616 | { | |
1617 | struct ieee80211_fragment_entry *entry; | |
1618 | int i, idx; | |
1619 | ||
1620 | idx = sdata->fragment_next; | |
1621 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) { | |
1622 | struct ieee80211_hdr *f_hdr; | |
571ecf67 JB |
1623 | |
1624 | idx--; | |
1625 | if (idx < 0) | |
1626 | idx = IEEE80211_FRAGMENT_MAX - 1; | |
1627 | ||
1628 | entry = &sdata->fragments[idx]; | |
1629 | if (skb_queue_empty(&entry->skb_list) || entry->seq != seq || | |
1630 | entry->rx_queue != rx_queue || | |
1631 | entry->last_frag + 1 != frag) | |
1632 | continue; | |
1633 | ||
b73d70ad | 1634 | f_hdr = (struct ieee80211_hdr *)entry->skb_list.next->data; |
571ecf67 | 1635 | |
b73d70ad HH |
1636 | /* |
1637 | * Check ftype and addresses are equal, else check next fragment | |
1638 | */ | |
1639 | if (((hdr->frame_control ^ f_hdr->frame_control) & | |
1640 | cpu_to_le16(IEEE80211_FCTL_FTYPE)) || | |
b203ca39 JP |
1641 | !ether_addr_equal(hdr->addr1, f_hdr->addr1) || |
1642 | !ether_addr_equal(hdr->addr2, f_hdr->addr2)) | |
571ecf67 JB |
1643 | continue; |
1644 | ||
ab46623e | 1645 | if (time_after(jiffies, entry->first_frag_time + 2 * HZ)) { |
571ecf67 JB |
1646 | __skb_queue_purge(&entry->skb_list); |
1647 | continue; | |
1648 | } | |
1649 | return entry; | |
1650 | } | |
1651 | ||
1652 | return NULL; | |
1653 | } | |
1654 | ||
49461622 | 1655 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 1656 | ieee80211_rx_h_defragment(struct ieee80211_rx_data *rx) |
571ecf67 JB |
1657 | { |
1658 | struct ieee80211_hdr *hdr; | |
1659 | u16 sc; | |
358c8d9d | 1660 | __le16 fc; |
571ecf67 JB |
1661 | unsigned int frag, seq; |
1662 | struct ieee80211_fragment_entry *entry; | |
1663 | struct sk_buff *skb; | |
554891e6 | 1664 | struct ieee80211_rx_status *status; |
571ecf67 | 1665 | |
b73d70ad | 1666 | hdr = (struct ieee80211_hdr *)rx->skb->data; |
358c8d9d | 1667 | fc = hdr->frame_control; |
f7fbf70e JC |
1668 | |
1669 | if (ieee80211_is_ctl(fc)) | |
1670 | return RX_CONTINUE; | |
1671 | ||
571ecf67 JB |
1672 | sc = le16_to_cpu(hdr->seq_ctrl); |
1673 | frag = sc & IEEE80211_SCTL_FRAG; | |
1674 | ||
358c8d9d | 1675 | if (likely((!ieee80211_has_morefrags(fc) && frag == 0) || |
571ecf67 JB |
1676 | is_multicast_ether_addr(hdr->addr1))) { |
1677 | /* not fragmented */ | |
1678 | goto out; | |
1679 | } | |
1680 | I802_DEBUG_INC(rx->local->rx_handlers_fragments); | |
1681 | ||
e3cf8b3f ZY |
1682 | if (skb_linearize(rx->skb)) |
1683 | return RX_DROP_UNUSABLE; | |
1684 | ||
058897a4 AK |
1685 | /* |
1686 | * skb_linearize() might change the skb->data and | |
1687 | * previously cached variables (in this case, hdr) need to | |
1688 | * be refreshed with the new data. | |
1689 | */ | |
1690 | hdr = (struct ieee80211_hdr *)rx->skb->data; | |
571ecf67 JB |
1691 | seq = (sc & IEEE80211_SCTL_SEQ) >> 4; |
1692 | ||
1693 | if (frag == 0) { | |
1694 | /* This is the first fragment of a new frame. */ | |
1695 | entry = ieee80211_reassemble_add(rx->sdata, frag, seq, | |
9e26297a | 1696 | rx->seqno_idx, &(rx->skb)); |
97359d12 | 1697 | if (rx->key && rx->key->conf.cipher == WLAN_CIPHER_SUITE_CCMP && |
358c8d9d | 1698 | ieee80211_has_protected(fc)) { |
9e26297a | 1699 | int queue = rx->security_idx; |
571ecf67 JB |
1700 | /* Store CCMP PN so that we can verify that the next |
1701 | * fragment has a sequential PN value. */ | |
1702 | entry->ccmp = 1; | |
1703 | memcpy(entry->last_pn, | |
9190252c | 1704 | rx->key->u.ccmp.rx_pn[queue], |
4325f6ca | 1705 | IEEE80211_CCMP_PN_LEN); |
571ecf67 | 1706 | } |
9ae54c84 | 1707 | return RX_QUEUED; |
571ecf67 JB |
1708 | } |
1709 | ||
1710 | /* This is a fragment for a frame that should already be pending in | |
1711 | * fragment cache. Add this fragment to the end of the pending entry. | |
1712 | */ | |
9e26297a JB |
1713 | entry = ieee80211_reassemble_find(rx->sdata, frag, seq, |
1714 | rx->seqno_idx, hdr); | |
571ecf67 JB |
1715 | if (!entry) { |
1716 | I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag); | |
e4c26add | 1717 | return RX_DROP_MONITOR; |
571ecf67 JB |
1718 | } |
1719 | ||
1720 | /* Verify that MPDUs within one MSDU have sequential PN values. | |
1721 | * (IEEE 802.11i, 8.3.3.4.5) */ | |
1722 | if (entry->ccmp) { | |
1723 | int i; | |
4325f6ca | 1724 | u8 pn[IEEE80211_CCMP_PN_LEN], *rpn; |
9190252c | 1725 | int queue; |
97359d12 | 1726 | if (!rx->key || rx->key->conf.cipher != WLAN_CIPHER_SUITE_CCMP) |
e4c26add | 1727 | return RX_DROP_UNUSABLE; |
4325f6ca JB |
1728 | memcpy(pn, entry->last_pn, IEEE80211_CCMP_PN_LEN); |
1729 | for (i = IEEE80211_CCMP_PN_LEN - 1; i >= 0; i--) { | |
571ecf67 JB |
1730 | pn[i]++; |
1731 | if (pn[i]) | |
1732 | break; | |
1733 | } | |
9e26297a | 1734 | queue = rx->security_idx; |
9190252c | 1735 | rpn = rx->key->u.ccmp.rx_pn[queue]; |
4325f6ca | 1736 | if (memcmp(pn, rpn, IEEE80211_CCMP_PN_LEN)) |
e4c26add | 1737 | return RX_DROP_UNUSABLE; |
4325f6ca | 1738 | memcpy(entry->last_pn, pn, IEEE80211_CCMP_PN_LEN); |
571ecf67 JB |
1739 | } |
1740 | ||
358c8d9d | 1741 | skb_pull(rx->skb, ieee80211_hdrlen(fc)); |
571ecf67 JB |
1742 | __skb_queue_tail(&entry->skb_list, rx->skb); |
1743 | entry->last_frag = frag; | |
1744 | entry->extra_len += rx->skb->len; | |
358c8d9d | 1745 | if (ieee80211_has_morefrags(fc)) { |
571ecf67 | 1746 | rx->skb = NULL; |
9ae54c84 | 1747 | return RX_QUEUED; |
571ecf67 JB |
1748 | } |
1749 | ||
1750 | rx->skb = __skb_dequeue(&entry->skb_list); | |
1751 | if (skb_tailroom(rx->skb) < entry->extra_len) { | |
1752 | I802_DEBUG_INC(rx->local->rx_expand_skb_head2); | |
1753 | if (unlikely(pskb_expand_head(rx->skb, 0, entry->extra_len, | |
1754 | GFP_ATOMIC))) { | |
1755 | I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag); | |
1756 | __skb_queue_purge(&entry->skb_list); | |
e4c26add | 1757 | return RX_DROP_UNUSABLE; |
571ecf67 JB |
1758 | } |
1759 | } | |
1760 | while ((skb = __skb_dequeue(&entry->skb_list))) { | |
1761 | memcpy(skb_put(rx->skb, skb->len), skb->data, skb->len); | |
1762 | dev_kfree_skb(skb); | |
1763 | } | |
1764 | ||
1765 | /* Complete frame has been reassembled - process it now */ | |
554891e6 JB |
1766 | status = IEEE80211_SKB_RXCB(rx->skb); |
1767 | status->rx_flags |= IEEE80211_RX_FRAGMENTED; | |
571ecf67 JB |
1768 | |
1769 | out: | |
1770 | if (rx->sta) | |
1771 | rx->sta->rx_packets++; | |
1772 | if (is_multicast_ether_addr(hdr->addr1)) | |
1773 | rx->local->dot11MulticastReceivedFrameCount++; | |
1774 | else | |
1775 | ieee80211_led_rx(rx->local); | |
9ae54c84 | 1776 | return RX_CONTINUE; |
571ecf67 JB |
1777 | } |
1778 | ||
1df332e8 | 1779 | static int ieee80211_802_1x_port_control(struct ieee80211_rx_data *rx) |
571ecf67 | 1780 | { |
1df332e8 | 1781 | if (unlikely(!rx->sta || !test_sta_flag(rx->sta, WLAN_STA_AUTHORIZED))) |
76ee65bf | 1782 | return -EACCES; |
571ecf67 | 1783 | |
76ee65bf | 1784 | return 0; |
571ecf67 JB |
1785 | } |
1786 | ||
1df332e8 | 1787 | static int ieee80211_drop_unencrypted(struct ieee80211_rx_data *rx, __le16 fc) |
571ecf67 | 1788 | { |
eb9fb5b8 JB |
1789 | struct sk_buff *skb = rx->skb; |
1790 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
1791 | ||
3017b80b | 1792 | /* |
7848ba7d JB |
1793 | * Pass through unencrypted frames if the hardware has |
1794 | * decrypted them already. | |
3017b80b | 1795 | */ |
eb9fb5b8 | 1796 | if (status->flag & RX_FLAG_DECRYPTED) |
76ee65bf | 1797 | return 0; |
571ecf67 JB |
1798 | |
1799 | /* Drop unencrypted frames if key is set. */ | |
358c8d9d HH |
1800 | if (unlikely(!ieee80211_has_protected(fc) && |
1801 | !ieee80211_is_nullfunc(fc) && | |
f2ca3ea4 | 1802 | ieee80211_is_data(fc) && |
b3fc9c6c | 1803 | (rx->key || rx->sdata->drop_unencrypted))) |
76ee65bf | 1804 | return -EACCES; |
bef5d1c7 JB |
1805 | |
1806 | return 0; | |
1807 | } | |
1808 | ||
1df332e8 | 1809 | static int ieee80211_drop_unencrypted_mgmt(struct ieee80211_rx_data *rx) |
bef5d1c7 JB |
1810 | { |
1811 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; | |
e3efca0a | 1812 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
bef5d1c7 | 1813 | __le16 fc = hdr->frame_control; |
bef5d1c7 | 1814 | |
e3efca0a JM |
1815 | /* |
1816 | * Pass through unencrypted frames if the hardware has | |
1817 | * decrypted them already. | |
1818 | */ | |
1819 | if (status->flag & RX_FLAG_DECRYPTED) | |
1820 | return 0; | |
bef5d1c7 | 1821 | |
c2c98fde | 1822 | if (rx->sta && test_sta_flag(rx->sta, WLAN_STA_MFP)) { |
d211e90e JM |
1823 | if (unlikely(!ieee80211_has_protected(fc) && |
1824 | ieee80211_is_unicast_robust_mgmt_frame(rx->skb) && | |
cf4e594e | 1825 | rx->key)) { |
6ff57cf8 JB |
1826 | if (ieee80211_is_deauth(fc) || |
1827 | ieee80211_is_disassoc(fc)) | |
1828 | cfg80211_rx_unprot_mlme_mgmt(rx->sdata->dev, | |
1829 | rx->skb->data, | |
1830 | rx->skb->len); | |
f2ca3ea4 | 1831 | return -EACCES; |
cf4e594e | 1832 | } |
f2ca3ea4 | 1833 | /* BIP does not use Protected field, so need to check MMIE */ |
f64f9e71 | 1834 | if (unlikely(ieee80211_is_multicast_robust_mgmt_frame(rx->skb) && |
cf4e594e | 1835 | ieee80211_get_mmie_keyidx(rx->skb) < 0)) { |
6ff57cf8 JB |
1836 | if (ieee80211_is_deauth(fc) || |
1837 | ieee80211_is_disassoc(fc)) | |
1838 | cfg80211_rx_unprot_mlme_mgmt(rx->sdata->dev, | |
1839 | rx->skb->data, | |
1840 | rx->skb->len); | |
f2ca3ea4 | 1841 | return -EACCES; |
cf4e594e | 1842 | } |
f2ca3ea4 JM |
1843 | /* |
1844 | * When using MFP, Action frames are not allowed prior to | |
1845 | * having configured keys. | |
1846 | */ | |
1847 | if (unlikely(ieee80211_is_action(fc) && !rx->key && | |
1848 | ieee80211_is_robust_mgmt_frame( | |
1849 | (struct ieee80211_hdr *) rx->skb->data))) | |
1850 | return -EACCES; | |
1851 | } | |
b3fc9c6c | 1852 | |
76ee65bf | 1853 | return 0; |
571ecf67 JB |
1854 | } |
1855 | ||
76ee65bf | 1856 | static int |
4114fa21 | 1857 | __ieee80211_data_to_8023(struct ieee80211_rx_data *rx, bool *port_control) |
571ecf67 | 1858 | { |
eb9fb5b8 | 1859 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
f14543ee | 1860 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
fbb327c5 FF |
1861 | bool check_port_control = false; |
1862 | struct ethhdr *ehdr; | |
1863 | int ret; | |
f14543ee | 1864 | |
4114fa21 | 1865 | *port_control = false; |
9bc383de JB |
1866 | if (ieee80211_has_a4(hdr->frame_control) && |
1867 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN && !sdata->u.vlan.sta) | |
f14543ee | 1868 | return -1; |
9bc383de | 1869 | |
fbb327c5 FF |
1870 | if (sdata->vif.type == NL80211_IFTYPE_STATION && |
1871 | !!sdata->u.mgd.use_4addr != !!ieee80211_has_a4(hdr->frame_control)) { | |
1872 | ||
1873 | if (!sdata->u.mgd.use_4addr) | |
1874 | return -1; | |
1875 | else | |
1876 | check_port_control = true; | |
1877 | } | |
1878 | ||
9bc383de | 1879 | if (is_multicast_ether_addr(hdr->addr1) && |
fbb327c5 | 1880 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN && sdata->u.vlan.sta) |
f14543ee | 1881 | return -1; |
571ecf67 | 1882 | |
fbb327c5 | 1883 | ret = ieee80211_data_to_8023(rx->skb, sdata->vif.addr, sdata->vif.type); |
4114fa21 | 1884 | if (ret < 0) |
fbb327c5 FF |
1885 | return ret; |
1886 | ||
1887 | ehdr = (struct ethhdr *) rx->skb->data; | |
4114fa21 FF |
1888 | if (ehdr->h_proto == rx->sdata->control_port_protocol) |
1889 | *port_control = true; | |
1890 | else if (check_port_control) | |
fbb327c5 FF |
1891 | return -1; |
1892 | ||
1893 | return 0; | |
76ee65bf | 1894 | } |
571ecf67 | 1895 | |
ce3edf6d JB |
1896 | /* |
1897 | * requires that rx->skb is a frame with ethernet header | |
1898 | */ | |
358c8d9d | 1899 | static bool ieee80211_frame_allowed(struct ieee80211_rx_data *rx, __le16 fc) |
ce3edf6d | 1900 | { |
c97c23e3 | 1901 | static const u8 pae_group_addr[ETH_ALEN] __aligned(2) |
ce3edf6d JB |
1902 | = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x03 }; |
1903 | struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data; | |
1904 | ||
1905 | /* | |
1906 | * Allow EAPOL frames to us/the PAE group address regardless | |
1907 | * of whether the frame was encrypted or not. | |
1908 | */ | |
a621fa4d | 1909 | if (ehdr->h_proto == rx->sdata->control_port_protocol && |
3bc7945e JP |
1910 | (ether_addr_equal(ehdr->h_dest, rx->sdata->vif.addr) || |
1911 | ether_addr_equal(ehdr->h_dest, pae_group_addr))) | |
ce3edf6d JB |
1912 | return true; |
1913 | ||
1914 | if (ieee80211_802_1x_port_control(rx) || | |
358c8d9d | 1915 | ieee80211_drop_unencrypted(rx, fc)) |
ce3edf6d JB |
1916 | return false; |
1917 | ||
1918 | return true; | |
1919 | } | |
1920 | ||
1921 | /* | |
1922 | * requires that rx->skb is a frame with ethernet header | |
1923 | */ | |
76ee65bf | 1924 | static void |
5cf121c3 | 1925 | ieee80211_deliver_skb(struct ieee80211_rx_data *rx) |
76ee65bf | 1926 | { |
eb9fb5b8 JB |
1927 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
1928 | struct net_device *dev = sdata->dev; | |
76ee65bf | 1929 | struct sk_buff *skb, *xmit_skb; |
ce3edf6d JB |
1930 | struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data; |
1931 | struct sta_info *dsta; | |
554891e6 | 1932 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
571ecf67 | 1933 | |
76ee65bf RR |
1934 | skb = rx->skb; |
1935 | xmit_skb = NULL; | |
571ecf67 | 1936 | |
05c914fe JB |
1937 | if ((sdata->vif.type == NL80211_IFTYPE_AP || |
1938 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) && | |
213cd118 | 1939 | !(sdata->flags & IEEE80211_SDATA_DONT_BRIDGE_PACKETS) && |
554891e6 | 1940 | (status->rx_flags & IEEE80211_RX_RA_MATCH) && |
9bc383de | 1941 | (sdata->vif.type != NL80211_IFTYPE_AP_VLAN || !sdata->u.vlan.sta)) { |
ce3edf6d JB |
1942 | if (is_multicast_ether_addr(ehdr->h_dest)) { |
1943 | /* | |
1944 | * send multicast frames both to higher layers in | |
1945 | * local net stack and back to the wireless medium | |
1946 | */ | |
76ee65bf | 1947 | xmit_skb = skb_copy(skb, GFP_ATOMIC); |
e87cc472 | 1948 | if (!xmit_skb) |
bdcbd8e0 | 1949 | net_info_ratelimited("%s: failed to clone multicast frame\n", |
e87cc472 | 1950 | dev->name); |
571ecf67 | 1951 | } else { |
abe60632 JB |
1952 | dsta = sta_info_get(sdata, skb->data); |
1953 | if (dsta) { | |
ce3edf6d JB |
1954 | /* |
1955 | * The destination station is associated to | |
1956 | * this AP (in this VLAN), so send the frame | |
1957 | * directly to it and do not pass it to local | |
1958 | * net stack. | |
571ecf67 | 1959 | */ |
76ee65bf | 1960 | xmit_skb = skb; |
571ecf67 JB |
1961 | skb = NULL; |
1962 | } | |
571ecf67 JB |
1963 | } |
1964 | } | |
1965 | ||
59d9cb07 | 1966 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS |
9e890a1f JB |
1967 | if (skb) { |
1968 | /* 'align' will only take the values 0 or 2 here since all | |
1969 | * frames are required to be aligned to 2-byte boundaries | |
1970 | * when being passed to mac80211; the code here works just | |
1971 | * as well if that isn't true, but mac80211 assumes it can | |
1972 | * access fields as 2-byte aligned (e.g. for ether_addr_equal) | |
d1c3a37c | 1973 | */ |
9e890a1f JB |
1974 | int align; |
1975 | ||
1976 | align = (unsigned long)(skb->data + sizeof(struct ethhdr)) & 3; | |
d1c3a37c JB |
1977 | if (align) { |
1978 | if (WARN_ON(skb_headroom(skb) < 3)) { | |
1979 | dev_kfree_skb(skb); | |
1980 | skb = NULL; | |
1981 | } else { | |
1982 | u8 *data = skb->data; | |
8ce0b589 ZY |
1983 | size_t len = skb_headlen(skb); |
1984 | skb->data -= align; | |
1985 | memmove(skb->data, data, len); | |
1986 | skb_set_tail_pointer(skb, len); | |
d1c3a37c JB |
1987 | } |
1988 | } | |
9e890a1f | 1989 | } |
d1c3a37c JB |
1990 | #endif |
1991 | ||
9e890a1f JB |
1992 | if (skb) { |
1993 | /* deliver to local stack */ | |
1994 | skb->protocol = eth_type_trans(skb, dev); | |
1995 | memset(skb->cb, 0, sizeof(skb->cb)); | |
1996 | netif_receive_skb(skb); | |
571ecf67 JB |
1997 | } |
1998 | ||
76ee65bf | 1999 | if (xmit_skb) { |
aef6c928 HS |
2000 | /* |
2001 | * Send to wireless media and increase priority by 256 to | |
2002 | * keep the received priority instead of reclassifying | |
2003 | * the frame (see cfg80211_classify8021d). | |
2004 | */ | |
2005 | xmit_skb->priority += 256; | |
f831e909 | 2006 | xmit_skb->protocol = htons(ETH_P_802_3); |
ce3edf6d JB |
2007 | skb_reset_network_header(xmit_skb); |
2008 | skb_reset_mac_header(xmit_skb); | |
76ee65bf | 2009 | dev_queue_xmit(xmit_skb); |
571ecf67 | 2010 | } |
76ee65bf RR |
2011 | } |
2012 | ||
49461622 | 2013 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 2014 | ieee80211_rx_h_amsdu(struct ieee80211_rx_data *rx) |
fd4c7f2f | 2015 | { |
eb9fb5b8 | 2016 | struct net_device *dev = rx->sdata->dev; |
eaf85ca7 | 2017 | struct sk_buff *skb = rx->skb; |
358c8d9d HH |
2018 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
2019 | __le16 fc = hdr->frame_control; | |
eaf85ca7 | 2020 | struct sk_buff_head frame_list; |
554891e6 | 2021 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
fd4c7f2f | 2022 | |
358c8d9d | 2023 | if (unlikely(!ieee80211_is_data(fc))) |
9ae54c84 | 2024 | return RX_CONTINUE; |
fd4c7f2f | 2025 | |
358c8d9d | 2026 | if (unlikely(!ieee80211_is_data_present(fc))) |
e4c26add | 2027 | return RX_DROP_MONITOR; |
fd4c7f2f | 2028 | |
554891e6 | 2029 | if (!(status->rx_flags & IEEE80211_RX_AMSDU)) |
9ae54c84 | 2030 | return RX_CONTINUE; |
fd4c7f2f | 2031 | |
eaf85ca7 ZY |
2032 | if (ieee80211_has_a4(hdr->frame_control) && |
2033 | rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
2034 | !rx->sdata->u.vlan.sta) | |
e4c26add | 2035 | return RX_DROP_UNUSABLE; |
fd4c7f2f | 2036 | |
eaf85ca7 ZY |
2037 | if (is_multicast_ether_addr(hdr->addr1) && |
2038 | ((rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
2039 | rx->sdata->u.vlan.sta) || | |
2040 | (rx->sdata->vif.type == NL80211_IFTYPE_STATION && | |
2041 | rx->sdata->u.mgd.use_4addr))) | |
e4c26add | 2042 | return RX_DROP_UNUSABLE; |
fd4c7f2f | 2043 | |
eaf85ca7 ZY |
2044 | skb->dev = dev; |
2045 | __skb_queue_head_init(&frame_list); | |
fd4c7f2f | 2046 | |
e3cf8b3f ZY |
2047 | if (skb_linearize(skb)) |
2048 | return RX_DROP_UNUSABLE; | |
2049 | ||
eaf85ca7 ZY |
2050 | ieee80211_amsdu_to_8023s(skb, &frame_list, dev->dev_addr, |
2051 | rx->sdata->vif.type, | |
8b3becad | 2052 | rx->local->hw.extra_tx_headroom, true); |
fd4c7f2f | 2053 | |
eaf85ca7 ZY |
2054 | while (!skb_queue_empty(&frame_list)) { |
2055 | rx->skb = __skb_dequeue(&frame_list); | |
fd4c7f2f | 2056 | |
358c8d9d | 2057 | if (!ieee80211_frame_allowed(rx, fc)) { |
eaf85ca7 | 2058 | dev_kfree_skb(rx->skb); |
ce3edf6d JB |
2059 | continue; |
2060 | } | |
eaf85ca7 ZY |
2061 | dev->stats.rx_packets++; |
2062 | dev->stats.rx_bytes += rx->skb->len; | |
fd4c7f2f RR |
2063 | |
2064 | ieee80211_deliver_skb(rx); | |
2065 | } | |
2066 | ||
9ae54c84 | 2067 | return RX_QUEUED; |
fd4c7f2f RR |
2068 | } |
2069 | ||
bf94e17b | 2070 | #ifdef CONFIG_MAC80211_MESH |
b0dee578 | 2071 | static ieee80211_rx_result |
e32f85f7 LCC |
2072 | ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx) |
2073 | { | |
30789eb6 TP |
2074 | struct ieee80211_hdr *fwd_hdr, *hdr; |
2075 | struct ieee80211_tx_info *info; | |
e32f85f7 | 2076 | struct ieee80211s_hdr *mesh_hdr; |
e32f85f7 | 2077 | struct sk_buff *skb = rx->skb, *fwd_skb; |
3b8d81e0 | 2078 | struct ieee80211_local *local = rx->local; |
eb9fb5b8 | 2079 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
554891e6 | 2080 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
30789eb6 | 2081 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
30789eb6 | 2082 | u16 q, hdrlen; |
e32f85f7 LCC |
2083 | |
2084 | hdr = (struct ieee80211_hdr *) skb->data; | |
2085 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
9b395bc3 JB |
2086 | |
2087 | /* make sure fixed part of mesh header is there, also checks skb len */ | |
2088 | if (!pskb_may_pull(rx->skb, hdrlen + 6)) | |
2089 | return RX_DROP_MONITOR; | |
2090 | ||
2091 | mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen); | |
2092 | ||
2093 | /* make sure full mesh header is there, also checks skb len */ | |
2094 | if (!pskb_may_pull(rx->skb, | |
2095 | hdrlen + ieee80211_get_mesh_hdrlen(mesh_hdr))) | |
2096 | return RX_DROP_MONITOR; | |
2097 | ||
2098 | /* reload pointers */ | |
2099 | hdr = (struct ieee80211_hdr *) skb->data; | |
e32f85f7 LCC |
2100 | mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen); |
2101 | ||
2157fdd6 TP |
2102 | /* frame is in RMC, don't forward */ |
2103 | if (ieee80211_is_data(hdr->frame_control) && | |
2104 | is_multicast_ether_addr(hdr->addr1) && | |
bf7cd94d | 2105 | mesh_rmc_check(rx->sdata, hdr->addr3, mesh_hdr)) |
2157fdd6 TP |
2106 | return RX_DROP_MONITOR; |
2107 | ||
555cb715 JC |
2108 | if (!ieee80211_is_data(hdr->frame_control) || |
2109 | !(status->rx_flags & IEEE80211_RX_RA_MATCH)) | |
e32f85f7 LCC |
2110 | return RX_CONTINUE; |
2111 | ||
2112 | if (!mesh_hdr->ttl) | |
e32f85f7 LCC |
2113 | return RX_DROP_MONITOR; |
2114 | ||
43b7b314 | 2115 | if (mesh_hdr->flags & MESH_FLAGS_AE) { |
79617dee | 2116 | struct mesh_path *mppath; |
43b7b314 JC |
2117 | char *proxied_addr; |
2118 | char *mpp_addr; | |
2119 | ||
2120 | if (is_multicast_ether_addr(hdr->addr1)) { | |
2121 | mpp_addr = hdr->addr3; | |
2122 | proxied_addr = mesh_hdr->eaddr1; | |
9b395bc3 JB |
2123 | } else if (mesh_hdr->flags & MESH_FLAGS_AE_A5_A6) { |
2124 | /* has_a4 already checked in ieee80211_rx_mesh_check */ | |
43b7b314 JC |
2125 | mpp_addr = hdr->addr4; |
2126 | proxied_addr = mesh_hdr->eaddr2; | |
9b395bc3 JB |
2127 | } else { |
2128 | return RX_DROP_MONITOR; | |
43b7b314 | 2129 | } |
79617dee | 2130 | |
79617dee | 2131 | rcu_read_lock(); |
bf7cd94d | 2132 | mppath = mpp_path_lookup(sdata, proxied_addr); |
79617dee | 2133 | if (!mppath) { |
bf7cd94d | 2134 | mpp_path_add(sdata, proxied_addr, mpp_addr); |
79617dee Y |
2135 | } else { |
2136 | spin_lock_bh(&mppath->state_lock); | |
b203ca39 | 2137 | if (!ether_addr_equal(mppath->mpp, mpp_addr)) |
43b7b314 | 2138 | memcpy(mppath->mpp, mpp_addr, ETH_ALEN); |
79617dee Y |
2139 | spin_unlock_bh(&mppath->state_lock); |
2140 | } | |
2141 | rcu_read_unlock(); | |
2142 | } | |
2143 | ||
3c5772a5 JC |
2144 | /* Frame has reached destination. Don't forward */ |
2145 | if (!is_multicast_ether_addr(hdr->addr1) && | |
b203ca39 | 2146 | ether_addr_equal(sdata->vif.addr, hdr->addr3)) |
e32f85f7 LCC |
2147 | return RX_CONTINUE; |
2148 | ||
00e96dec | 2149 | q = ieee80211_select_queue_80211(sdata, skb, hdr); |
d3c1597b | 2150 | if (ieee80211_queue_stopped(&local->hw, q)) { |
30789eb6 | 2151 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_congestion); |
d3c1597b TP |
2152 | return RX_DROP_MONITOR; |
2153 | } | |
2154 | skb_set_queue_mapping(skb, q); | |
e32f85f7 | 2155 | |
30789eb6 TP |
2156 | if (!--mesh_hdr->ttl) { |
2157 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_ttl); | |
2ac64cd1 | 2158 | goto out; |
30789eb6 TP |
2159 | } |
2160 | ||
d665508b CYY |
2161 | if (!ifmsh->mshcfg.dot11MeshForwarding) |
2162 | goto out; | |
2163 | ||
30789eb6 TP |
2164 | fwd_skb = skb_copy(skb, GFP_ATOMIC); |
2165 | if (!fwd_skb) { | |
bdcbd8e0 | 2166 | net_info_ratelimited("%s: failed to clone mesh frame\n", |
e87cc472 | 2167 | sdata->name); |
30789eb6 TP |
2168 | goto out; |
2169 | } | |
2170 | ||
2171 | fwd_hdr = (struct ieee80211_hdr *) fwd_skb->data; | |
9d6d6f49 | 2172 | fwd_hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_RETRY); |
30789eb6 TP |
2173 | info = IEEE80211_SKB_CB(fwd_skb); |
2174 | memset(info, 0, sizeof(*info)); | |
2175 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; | |
2176 | info->control.vif = &rx->sdata->vif; | |
2177 | info->control.jiffies = jiffies; | |
2178 | if (is_multicast_ether_addr(fwd_hdr->addr1)) { | |
2179 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_mcast); | |
2180 | memcpy(fwd_hdr->addr2, sdata->vif.addr, ETH_ALEN); | |
3f52b7e3 MP |
2181 | /* update power mode indication when forwarding */ |
2182 | ieee80211_mps_set_frame_flags(sdata, NULL, fwd_hdr); | |
bf7cd94d | 2183 | } else if (!mesh_nexthop_lookup(sdata, fwd_skb)) { |
3f52b7e3 | 2184 | /* mesh power mode flags updated in mesh_nexthop_lookup */ |
30789eb6 TP |
2185 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_unicast); |
2186 | } else { | |
2187 | /* unable to resolve next hop */ | |
bf7cd94d | 2188 | mesh_path_error_tx(sdata, ifmsh->mshcfg.element_ttl, |
f63f8421 CYY |
2189 | fwd_hdr->addr3, 0, |
2190 | WLAN_REASON_MESH_PATH_NOFORWARD, | |
2191 | fwd_hdr->addr2); | |
30789eb6 | 2192 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_no_route); |
74b8cc3d | 2193 | kfree_skb(fwd_skb); |
30789eb6 | 2194 | return RX_DROP_MONITOR; |
e32f85f7 LCC |
2195 | } |
2196 | ||
30789eb6 TP |
2197 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_frames); |
2198 | ieee80211_add_pending_skb(local, fwd_skb); | |
b51aff05 | 2199 | out: |
3c5772a5 | 2200 | if (is_multicast_ether_addr(hdr->addr1) || |
eb9fb5b8 | 2201 | sdata->dev->flags & IFF_PROMISC) |
e32f85f7 LCC |
2202 | return RX_CONTINUE; |
2203 | else | |
2204 | return RX_DROP_MONITOR; | |
2205 | } | |
bf94e17b | 2206 | #endif |
e32f85f7 | 2207 | |
49461622 | 2208 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 2209 | ieee80211_rx_h_data(struct ieee80211_rx_data *rx) |
76ee65bf | 2210 | { |
eb9fb5b8 | 2211 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
e15276a4 | 2212 | struct ieee80211_local *local = rx->local; |
eb9fb5b8 | 2213 | struct net_device *dev = sdata->dev; |
358c8d9d HH |
2214 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
2215 | __le16 fc = hdr->frame_control; | |
4114fa21 | 2216 | bool port_control; |
ce3edf6d | 2217 | int err; |
76ee65bf | 2218 | |
358c8d9d | 2219 | if (unlikely(!ieee80211_is_data(hdr->frame_control))) |
9ae54c84 | 2220 | return RX_CONTINUE; |
76ee65bf | 2221 | |
358c8d9d | 2222 | if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) |
e4c26add | 2223 | return RX_DROP_MONITOR; |
76ee65bf | 2224 | |
f14543ee | 2225 | /* |
e7f4a940 JB |
2226 | * Send unexpected-4addr-frame event to hostapd. For older versions, |
2227 | * also drop the frame to cooked monitor interfaces. | |
f14543ee FF |
2228 | */ |
2229 | if (ieee80211_has_a4(hdr->frame_control) && | |
e7f4a940 JB |
2230 | sdata->vif.type == NL80211_IFTYPE_AP) { |
2231 | if (rx->sta && | |
2232 | !test_and_set_sta_flag(rx->sta, WLAN_STA_4ADDR_EVENT)) | |
2233 | cfg80211_rx_unexpected_4addr_frame( | |
2234 | rx->sdata->dev, rx->sta->sta.addr, GFP_ATOMIC); | |
f14543ee | 2235 | return RX_DROP_MONITOR; |
e7f4a940 | 2236 | } |
f14543ee | 2237 | |
4114fa21 | 2238 | err = __ieee80211_data_to_8023(rx, &port_control); |
76ee65bf | 2239 | if (unlikely(err)) |
e4c26add | 2240 | return RX_DROP_UNUSABLE; |
76ee65bf | 2241 | |
358c8d9d | 2242 | if (!ieee80211_frame_allowed(rx, fc)) |
e4c26add | 2243 | return RX_DROP_MONITOR; |
ce3edf6d | 2244 | |
4114fa21 FF |
2245 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && |
2246 | unlikely(port_control) && sdata->bss) { | |
2247 | sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, | |
2248 | u.ap); | |
2249 | dev = sdata->dev; | |
2250 | rx->sdata = sdata; | |
2251 | } | |
2252 | ||
76ee65bf RR |
2253 | rx->skb->dev = dev; |
2254 | ||
2255 | dev->stats.rx_packets++; | |
2256 | dev->stats.rx_bytes += rx->skb->len; | |
2257 | ||
08ca944e | 2258 | if (local->ps_sdata && local->hw.conf.dynamic_ps_timeout > 0 && |
8c99f691 RM |
2259 | !is_multicast_ether_addr( |
2260 | ((struct ethhdr *)rx->skb->data)->h_dest) && | |
2261 | (!local->scanning && | |
2262 | !test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state))) { | |
e15276a4 VN |
2263 | mod_timer(&local->dynamic_ps_timer, jiffies + |
2264 | msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout)); | |
2265 | } | |
2266 | ||
76ee65bf | 2267 | ieee80211_deliver_skb(rx); |
571ecf67 | 2268 | |
9ae54c84 | 2269 | return RX_QUEUED; |
571ecf67 JB |
2270 | } |
2271 | ||
49461622 | 2272 | static ieee80211_rx_result debug_noinline |
f9e124fb | 2273 | ieee80211_rx_h_ctrl(struct ieee80211_rx_data *rx, struct sk_buff_head *frames) |
71364716 | 2274 | { |
71364716 | 2275 | struct sk_buff *skb = rx->skb; |
a7767f95 | 2276 | struct ieee80211_bar *bar = (struct ieee80211_bar *)skb->data; |
71364716 RR |
2277 | struct tid_ampdu_rx *tid_agg_rx; |
2278 | u16 start_seq_num; | |
2279 | u16 tid; | |
2280 | ||
a7767f95 | 2281 | if (likely(!ieee80211_is_ctl(bar->frame_control))) |
9ae54c84 | 2282 | return RX_CONTINUE; |
71364716 | 2283 | |
a7767f95 | 2284 | if (ieee80211_is_back_req(bar->frame_control)) { |
8ae5977f JB |
2285 | struct { |
2286 | __le16 control, start_seq_num; | |
2287 | } __packed bar_data; | |
2288 | ||
71364716 | 2289 | if (!rx->sta) |
a02ae758 | 2290 | return RX_DROP_MONITOR; |
8ae5977f JB |
2291 | |
2292 | if (skb_copy_bits(skb, offsetof(struct ieee80211_bar, control), | |
2293 | &bar_data, sizeof(bar_data))) | |
2294 | return RX_DROP_MONITOR; | |
2295 | ||
8ae5977f | 2296 | tid = le16_to_cpu(bar_data.control) >> 12; |
a87f736d JB |
2297 | |
2298 | tid_agg_rx = rcu_dereference(rx->sta->ampdu_mlme.tid_rx[tid]); | |
2299 | if (!tid_agg_rx) | |
a02ae758 | 2300 | return RX_DROP_MONITOR; |
71364716 | 2301 | |
8ae5977f | 2302 | start_seq_num = le16_to_cpu(bar_data.start_seq_num) >> 4; |
71364716 RR |
2303 | |
2304 | /* reset session timer */ | |
20ad19d0 JB |
2305 | if (tid_agg_rx->timeout) |
2306 | mod_timer(&tid_agg_rx->session_timer, | |
2307 | TU_TO_EXP_TIME(tid_agg_rx->timeout)); | |
71364716 | 2308 | |
dd318575 | 2309 | spin_lock(&tid_agg_rx->reorder_lock); |
a02ae758 | 2310 | /* release stored frames up to start of BAR */ |
d3b2fb53 | 2311 | ieee80211_release_reorder_frames(rx->sdata, tid_agg_rx, |
f9e124fb | 2312 | start_seq_num, frames); |
dd318575 JB |
2313 | spin_unlock(&tid_agg_rx->reorder_lock); |
2314 | ||
a02ae758 JB |
2315 | kfree_skb(skb); |
2316 | return RX_QUEUED; | |
71364716 RR |
2317 | } |
2318 | ||
08daecae JB |
2319 | /* |
2320 | * After this point, we only want management frames, | |
2321 | * so we can drop all remaining control frames to | |
2322 | * cooked monitor interfaces. | |
2323 | */ | |
2324 | return RX_DROP_MONITOR; | |
71364716 RR |
2325 | } |
2326 | ||
f4f727a6 JM |
2327 | static void ieee80211_process_sa_query_req(struct ieee80211_sub_if_data *sdata, |
2328 | struct ieee80211_mgmt *mgmt, | |
2329 | size_t len) | |
fea14732 JM |
2330 | { |
2331 | struct ieee80211_local *local = sdata->local; | |
2332 | struct sk_buff *skb; | |
2333 | struct ieee80211_mgmt *resp; | |
2334 | ||
b203ca39 | 2335 | if (!ether_addr_equal(mgmt->da, sdata->vif.addr)) { |
fea14732 JM |
2336 | /* Not to own unicast address */ |
2337 | return; | |
2338 | } | |
2339 | ||
b203ca39 JP |
2340 | if (!ether_addr_equal(mgmt->sa, sdata->u.mgd.bssid) || |
2341 | !ether_addr_equal(mgmt->bssid, sdata->u.mgd.bssid)) { | |
77fdaa12 | 2342 | /* Not from the current AP or not associated yet. */ |
fea14732 JM |
2343 | return; |
2344 | } | |
2345 | ||
2346 | if (len < 24 + 1 + sizeof(resp->u.action.u.sa_query)) { | |
2347 | /* Too short SA Query request frame */ | |
2348 | return; | |
2349 | } | |
2350 | ||
2351 | skb = dev_alloc_skb(sizeof(*resp) + local->hw.extra_tx_headroom); | |
2352 | if (skb == NULL) | |
2353 | return; | |
2354 | ||
2355 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2356 | resp = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
2357 | memset(resp, 0, 24); | |
2358 | memcpy(resp->da, mgmt->sa, ETH_ALEN); | |
47846c9b | 2359 | memcpy(resp->sa, sdata->vif.addr, ETH_ALEN); |
46900298 | 2360 | memcpy(resp->bssid, sdata->u.mgd.bssid, ETH_ALEN); |
fea14732 JM |
2361 | resp->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
2362 | IEEE80211_STYPE_ACTION); | |
2363 | skb_put(skb, 1 + sizeof(resp->u.action.u.sa_query)); | |
2364 | resp->u.action.category = WLAN_CATEGORY_SA_QUERY; | |
2365 | resp->u.action.u.sa_query.action = WLAN_ACTION_SA_QUERY_RESPONSE; | |
2366 | memcpy(resp->u.action.u.sa_query.trans_id, | |
2367 | mgmt->u.action.u.sa_query.trans_id, | |
2368 | WLAN_SA_QUERY_TR_ID_LEN); | |
2369 | ||
62ae67be | 2370 | ieee80211_tx_skb(sdata, skb); |
fea14732 JM |
2371 | } |
2372 | ||
2e161f78 JB |
2373 | static ieee80211_rx_result debug_noinline |
2374 | ieee80211_rx_h_mgmt_check(struct ieee80211_rx_data *rx) | |
2375 | { | |
2376 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; | |
554891e6 | 2377 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
2e161f78 JB |
2378 | |
2379 | /* | |
2380 | * From here on, look only at management frames. | |
2381 | * Data and control frames are already handled, | |
2382 | * and unknown (reserved) frames are useless. | |
2383 | */ | |
2384 | if (rx->skb->len < 24) | |
2385 | return RX_DROP_MONITOR; | |
2386 | ||
2387 | if (!ieee80211_is_mgmt(mgmt->frame_control)) | |
2388 | return RX_DROP_MONITOR; | |
2389 | ||
ee971924 JB |
2390 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP && |
2391 | ieee80211_is_beacon(mgmt->frame_control) && | |
2392 | !(rx->flags & IEEE80211_RX_BEACON_REPORTED)) { | |
804483e9 JB |
2393 | int sig = 0; |
2394 | ||
2395 | if (rx->local->hw.flags & IEEE80211_HW_SIGNAL_DBM) | |
2396 | sig = status->signal; | |
2397 | ||
ee971924 JB |
2398 | cfg80211_report_obss_beacon(rx->local->hw.wiphy, |
2399 | rx->skb->data, rx->skb->len, | |
37c73b5f | 2400 | status->freq, sig); |
ee971924 JB |
2401 | rx->flags |= IEEE80211_RX_BEACON_REPORTED; |
2402 | } | |
2403 | ||
554891e6 | 2404 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
2e161f78 JB |
2405 | return RX_DROP_MONITOR; |
2406 | ||
2407 | if (ieee80211_drop_unencrypted_mgmt(rx)) | |
2408 | return RX_DROP_UNUSABLE; | |
2409 | ||
2410 | return RX_CONTINUE; | |
2411 | } | |
2412 | ||
de1ede7a JB |
2413 | static ieee80211_rx_result debug_noinline |
2414 | ieee80211_rx_h_action(struct ieee80211_rx_data *rx) | |
2415 | { | |
2416 | struct ieee80211_local *local = rx->local; | |
eb9fb5b8 | 2417 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
de1ede7a | 2418 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; |
554891e6 | 2419 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
de1ede7a JB |
2420 | int len = rx->skb->len; |
2421 | ||
2422 | if (!ieee80211_is_action(mgmt->frame_control)) | |
2423 | return RX_CONTINUE; | |
2424 | ||
026331c4 JM |
2425 | /* drop too small frames */ |
2426 | if (len < IEEE80211_MIN_ACTION_SIZE) | |
84040805 | 2427 | return RX_DROP_UNUSABLE; |
de1ede7a | 2428 | |
815b8092 | 2429 | if (!rx->sta && mgmt->u.action.category != WLAN_CATEGORY_PUBLIC && |
cd7760e6 SW |
2430 | mgmt->u.action.category != WLAN_CATEGORY_SELF_PROTECTED && |
2431 | mgmt->u.action.category != WLAN_CATEGORY_SPECTRUM_MGMT) | |
84040805 | 2432 | return RX_DROP_UNUSABLE; |
de1ede7a | 2433 | |
554891e6 | 2434 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
84040805 | 2435 | return RX_DROP_UNUSABLE; |
97ebe12a | 2436 | |
de1ede7a | 2437 | switch (mgmt->u.action.category) { |
1d8d3dec JB |
2438 | case WLAN_CATEGORY_HT: |
2439 | /* reject HT action frames from stations not supporting HT */ | |
2440 | if (!rx->sta->sta.ht_cap.ht_supported) | |
2441 | goto invalid; | |
2442 | ||
2443 | if (sdata->vif.type != NL80211_IFTYPE_STATION && | |
2444 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && | |
2445 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && | |
2446 | sdata->vif.type != NL80211_IFTYPE_AP && | |
2447 | sdata->vif.type != NL80211_IFTYPE_ADHOC) | |
2448 | break; | |
2449 | ||
ec61cd63 | 2450 | /* verify action & smps_control/chanwidth are present */ |
1d8d3dec JB |
2451 | if (len < IEEE80211_MIN_ACTION_SIZE + 2) |
2452 | goto invalid; | |
2453 | ||
2454 | switch (mgmt->u.action.u.ht_smps.action) { | |
2455 | case WLAN_HT_ACTION_SMPS: { | |
2456 | struct ieee80211_supported_band *sband; | |
af0ed69b | 2457 | enum ieee80211_smps_mode smps_mode; |
1d8d3dec JB |
2458 | |
2459 | /* convert to HT capability */ | |
2460 | switch (mgmt->u.action.u.ht_smps.smps_control) { | |
2461 | case WLAN_HT_SMPS_CONTROL_DISABLED: | |
af0ed69b | 2462 | smps_mode = IEEE80211_SMPS_OFF; |
1d8d3dec JB |
2463 | break; |
2464 | case WLAN_HT_SMPS_CONTROL_STATIC: | |
af0ed69b | 2465 | smps_mode = IEEE80211_SMPS_STATIC; |
1d8d3dec JB |
2466 | break; |
2467 | case WLAN_HT_SMPS_CONTROL_DYNAMIC: | |
af0ed69b | 2468 | smps_mode = IEEE80211_SMPS_DYNAMIC; |
1d8d3dec JB |
2469 | break; |
2470 | default: | |
2471 | goto invalid; | |
2472 | } | |
1d8d3dec JB |
2473 | |
2474 | /* if no change do nothing */ | |
af0ed69b | 2475 | if (rx->sta->sta.smps_mode == smps_mode) |
1d8d3dec | 2476 | goto handled; |
af0ed69b | 2477 | rx->sta->sta.smps_mode = smps_mode; |
1d8d3dec JB |
2478 | |
2479 | sband = rx->local->hw.wiphy->bands[status->band]; | |
2480 | ||
64f68e5d JB |
2481 | rate_control_rate_update(local, sband, rx->sta, |
2482 | IEEE80211_RC_SMPS_CHANGED); | |
1d8d3dec JB |
2483 | goto handled; |
2484 | } | |
ec61cd63 JB |
2485 | case WLAN_HT_ACTION_NOTIFY_CHANWIDTH: { |
2486 | struct ieee80211_supported_band *sband; | |
2487 | u8 chanwidth = mgmt->u.action.u.ht_notify_cw.chanwidth; | |
e1a0c6b3 | 2488 | enum ieee80211_sta_rx_bandwidth new_bw; |
ec61cd63 JB |
2489 | |
2490 | /* If it doesn't support 40 MHz it can't change ... */ | |
e1a0c6b3 JB |
2491 | if (!(rx->sta->sta.ht_cap.cap & |
2492 | IEEE80211_HT_CAP_SUP_WIDTH_20_40)) | |
ec61cd63 JB |
2493 | goto handled; |
2494 | ||
e1a0c6b3 JB |
2495 | if (chanwidth == IEEE80211_HT_CHANWIDTH_20MHZ) |
2496 | new_bw = IEEE80211_STA_RX_BW_20; | |
2497 | else | |
2498 | new_bw = ieee80211_sta_cur_vht_bw(rx->sta); | |
ec61cd63 | 2499 | |
e1a0c6b3 | 2500 | if (rx->sta->sta.bandwidth == new_bw) |
ec61cd63 JB |
2501 | goto handled; |
2502 | ||
ec61cd63 JB |
2503 | sband = rx->local->hw.wiphy->bands[status->band]; |
2504 | ||
2505 | rate_control_rate_update(local, sband, rx->sta, | |
2506 | IEEE80211_RC_BW_CHANGED); | |
2507 | goto handled; | |
2508 | } | |
1d8d3dec JB |
2509 | default: |
2510 | goto invalid; | |
2511 | } | |
2512 | ||
0af83d3d | 2513 | break; |
1b3a2e49 JB |
2514 | case WLAN_CATEGORY_PUBLIC: |
2515 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2516 | goto invalid; | |
2517 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
2518 | break; | |
2519 | if (!rx->sta) | |
2520 | break; | |
2521 | if (!ether_addr_equal(mgmt->bssid, sdata->u.mgd.bssid)) | |
2522 | break; | |
2523 | if (mgmt->u.action.u.ext_chan_switch.action_code != | |
2524 | WLAN_PUB_ACTION_EXT_CHANSW_ANN) | |
2525 | break; | |
2526 | if (len < offsetof(struct ieee80211_mgmt, | |
2527 | u.action.u.ext_chan_switch.variable)) | |
2528 | goto invalid; | |
2529 | goto queue; | |
0af83d3d JB |
2530 | case WLAN_CATEGORY_VHT: |
2531 | if (sdata->vif.type != NL80211_IFTYPE_STATION && | |
2532 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && | |
2533 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && | |
2534 | sdata->vif.type != NL80211_IFTYPE_AP && | |
2535 | sdata->vif.type != NL80211_IFTYPE_ADHOC) | |
2536 | break; | |
2537 | ||
2538 | /* verify action code is present */ | |
2539 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2540 | goto invalid; | |
2541 | ||
2542 | switch (mgmt->u.action.u.vht_opmode_notif.action_code) { | |
2543 | case WLAN_VHT_ACTION_OPMODE_NOTIF: { | |
2544 | u8 opmode; | |
2545 | ||
2546 | /* verify opmode is present */ | |
2547 | if (len < IEEE80211_MIN_ACTION_SIZE + 2) | |
2548 | goto invalid; | |
2549 | ||
2550 | opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode; | |
2551 | ||
2552 | ieee80211_vht_handle_opmode(rx->sdata, rx->sta, | |
bee7f586 JB |
2553 | opmode, status->band, |
2554 | false); | |
0af83d3d JB |
2555 | goto handled; |
2556 | } | |
2557 | default: | |
2558 | break; | |
2559 | } | |
1d8d3dec | 2560 | break; |
de1ede7a | 2561 | case WLAN_CATEGORY_BACK: |
8abd3f9b | 2562 | if (sdata->vif.type != NL80211_IFTYPE_STATION && |
ae2772b3 | 2563 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && |
8abd3f9b | 2564 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && |
13c40c54 AS |
2565 | sdata->vif.type != NL80211_IFTYPE_AP && |
2566 | sdata->vif.type != NL80211_IFTYPE_ADHOC) | |
84040805 | 2567 | break; |
8abd3f9b | 2568 | |
026331c4 JM |
2569 | /* verify action_code is present */ |
2570 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2571 | break; | |
2572 | ||
de1ede7a JB |
2573 | switch (mgmt->u.action.u.addba_req.action_code) { |
2574 | case WLAN_ACTION_ADDBA_REQ: | |
2575 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2576 | sizeof(mgmt->u.action.u.addba_req))) | |
bed7ee6e JB |
2577 | goto invalid; |
2578 | break; | |
de1ede7a JB |
2579 | case WLAN_ACTION_ADDBA_RESP: |
2580 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2581 | sizeof(mgmt->u.action.u.addba_resp))) | |
bed7ee6e JB |
2582 | goto invalid; |
2583 | break; | |
de1ede7a JB |
2584 | case WLAN_ACTION_DELBA: |
2585 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2586 | sizeof(mgmt->u.action.u.delba))) | |
bed7ee6e JB |
2587 | goto invalid; |
2588 | break; | |
2589 | default: | |
2590 | goto invalid; | |
de1ede7a | 2591 | } |
bed7ee6e | 2592 | |
8b58ff83 | 2593 | goto queue; |
39192c0b | 2594 | case WLAN_CATEGORY_SPECTRUM_MGMT: |
026331c4 JM |
2595 | /* verify action_code is present */ |
2596 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2597 | break; | |
2598 | ||
39192c0b JB |
2599 | switch (mgmt->u.action.u.measurement.action_code) { |
2600 | case WLAN_ACTION_SPCT_MSR_REQ: | |
cd7760e6 SW |
2601 | if (status->band != IEEE80211_BAND_5GHZ) |
2602 | break; | |
2603 | ||
39192c0b JB |
2604 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
2605 | sizeof(mgmt->u.action.u.measurement))) | |
84040805 | 2606 | break; |
cd7760e6 SW |
2607 | |
2608 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
2609 | break; | |
2610 | ||
39192c0b | 2611 | ieee80211_process_measurement_req(sdata, mgmt, len); |
84040805 | 2612 | goto handled; |
cd7760e6 SW |
2613 | case WLAN_ACTION_SPCT_CHL_SWITCH: { |
2614 | u8 *bssid; | |
2615 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2616 | sizeof(mgmt->u.action.u.chan_switch))) | |
84040805 | 2617 | break; |
cc32abd4 | 2618 | |
cd7760e6 | 2619 | if (sdata->vif.type != NL80211_IFTYPE_STATION && |
b8456a14 CYY |
2620 | sdata->vif.type != NL80211_IFTYPE_ADHOC && |
2621 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT) | |
cd7760e6 SW |
2622 | break; |
2623 | ||
2624 | if (sdata->vif.type == NL80211_IFTYPE_STATION) | |
2625 | bssid = sdata->u.mgd.bssid; | |
2626 | else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) | |
2627 | bssid = sdata->u.ibss.bssid; | |
b8456a14 CYY |
2628 | else if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) |
2629 | bssid = mgmt->sa; | |
cd7760e6 SW |
2630 | else |
2631 | break; | |
2632 | ||
2633 | if (!ether_addr_equal(mgmt->bssid, bssid)) | |
84040805 | 2634 | break; |
c481ec97 | 2635 | |
8b58ff83 | 2636 | goto queue; |
cd7760e6 | 2637 | } |
39192c0b JB |
2638 | } |
2639 | break; | |
fea14732 JM |
2640 | case WLAN_CATEGORY_SA_QUERY: |
2641 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2642 | sizeof(mgmt->u.action.u.sa_query))) | |
84040805 JB |
2643 | break; |
2644 | ||
fea14732 JM |
2645 | switch (mgmt->u.action.u.sa_query.action) { |
2646 | case WLAN_ACTION_SA_QUERY_REQUEST: | |
2647 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
84040805 | 2648 | break; |
fea14732 | 2649 | ieee80211_process_sa_query_req(sdata, mgmt, len); |
84040805 | 2650 | goto handled; |
fea14732 JM |
2651 | } |
2652 | break; | |
8db09850 | 2653 | case WLAN_CATEGORY_SELF_PROTECTED: |
9b395bc3 JB |
2654 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
2655 | sizeof(mgmt->u.action.u.self_prot.action_code))) | |
2656 | break; | |
2657 | ||
8db09850 TP |
2658 | switch (mgmt->u.action.u.self_prot.action_code) { |
2659 | case WLAN_SP_MESH_PEERING_OPEN: | |
2660 | case WLAN_SP_MESH_PEERING_CLOSE: | |
2661 | case WLAN_SP_MESH_PEERING_CONFIRM: | |
2662 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
2663 | goto invalid; | |
a6dad6a2 | 2664 | if (sdata->u.mesh.user_mpm) |
8db09850 TP |
2665 | /* userspace handles this frame */ |
2666 | break; | |
2667 | goto queue; | |
2668 | case WLAN_SP_MGK_INFORM: | |
2669 | case WLAN_SP_MGK_ACK: | |
2670 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
2671 | goto invalid; | |
2672 | break; | |
2673 | } | |
2674 | break; | |
d3aaec8a | 2675 | case WLAN_CATEGORY_MESH_ACTION: |
9b395bc3 JB |
2676 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
2677 | sizeof(mgmt->u.action.u.mesh_action.action_code))) | |
2678 | break; | |
2679 | ||
77a121c3 JB |
2680 | if (!ieee80211_vif_is_mesh(&sdata->vif)) |
2681 | break; | |
25d49e4d | 2682 | if (mesh_action_is_path_sel(mgmt) && |
1df332e8 | 2683 | !mesh_path_sel_is_hwmp(sdata)) |
c7108a71 JC |
2684 | break; |
2685 | goto queue; | |
84040805 | 2686 | } |
026331c4 | 2687 | |
2e161f78 JB |
2688 | return RX_CONTINUE; |
2689 | ||
bed7ee6e | 2690 | invalid: |
554891e6 | 2691 | status->rx_flags |= IEEE80211_RX_MALFORMED_ACTION_FRM; |
2e161f78 JB |
2692 | /* will return in the next handlers */ |
2693 | return RX_CONTINUE; | |
2694 | ||
2695 | handled: | |
2696 | if (rx->sta) | |
2697 | rx->sta->rx_packets++; | |
2698 | dev_kfree_skb(rx->skb); | |
2699 | return RX_QUEUED; | |
2700 | ||
2701 | queue: | |
2702 | rx->skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; | |
2703 | skb_queue_tail(&sdata->skb_queue, rx->skb); | |
2704 | ieee80211_queue_work(&local->hw, &sdata->work); | |
2705 | if (rx->sta) | |
2706 | rx->sta->rx_packets++; | |
2707 | return RX_QUEUED; | |
2708 | } | |
2709 | ||
2710 | static ieee80211_rx_result debug_noinline | |
2711 | ieee80211_rx_h_userspace_mgmt(struct ieee80211_rx_data *rx) | |
2712 | { | |
554891e6 | 2713 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
804483e9 | 2714 | int sig = 0; |
2e161f78 JB |
2715 | |
2716 | /* skip known-bad action frames and return them in the next handler */ | |
554891e6 | 2717 | if (status->rx_flags & IEEE80211_RX_MALFORMED_ACTION_FRM) |
2e161f78 | 2718 | return RX_CONTINUE; |
d7907448 | 2719 | |
026331c4 JM |
2720 | /* |
2721 | * Getting here means the kernel doesn't know how to handle | |
2722 | * it, but maybe userspace does ... include returned frames | |
2723 | * so userspace can register for those to know whether ones | |
2724 | * it transmitted were processed or returned. | |
2725 | */ | |
026331c4 | 2726 | |
804483e9 JB |
2727 | if (rx->local->hw.flags & IEEE80211_HW_SIGNAL_DBM) |
2728 | sig = status->signal; | |
2729 | ||
71bbc994 | 2730 | if (cfg80211_rx_mgmt(&rx->sdata->wdev, status->freq, sig, |
19504cf5 | 2731 | rx->skb->data, rx->skb->len, 0, GFP_ATOMIC)) { |
2e161f78 JB |
2732 | if (rx->sta) |
2733 | rx->sta->rx_packets++; | |
2734 | dev_kfree_skb(rx->skb); | |
2735 | return RX_QUEUED; | |
2736 | } | |
2737 | ||
2e161f78 JB |
2738 | return RX_CONTINUE; |
2739 | } | |
2740 | ||
2741 | static ieee80211_rx_result debug_noinline | |
2742 | ieee80211_rx_h_action_return(struct ieee80211_rx_data *rx) | |
2743 | { | |
2744 | struct ieee80211_local *local = rx->local; | |
2745 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; | |
2746 | struct sk_buff *nskb; | |
2747 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
554891e6 | 2748 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
2e161f78 JB |
2749 | |
2750 | if (!ieee80211_is_action(mgmt->frame_control)) | |
2751 | return RX_CONTINUE; | |
2752 | ||
2753 | /* | |
2754 | * For AP mode, hostapd is responsible for handling any action | |
2755 | * frames that we didn't handle, including returning unknown | |
2756 | * ones. For all other modes we will return them to the sender, | |
2757 | * setting the 0x80 bit in the action category, as required by | |
4b5ebccc | 2758 | * 802.11-2012 9.24.4. |
2e161f78 JB |
2759 | * Newer versions of hostapd shall also use the management frame |
2760 | * registration mechanisms, but older ones still use cooked | |
2761 | * monitor interfaces so push all frames there. | |
2762 | */ | |
554891e6 | 2763 | if (!(status->rx_flags & IEEE80211_RX_MALFORMED_ACTION_FRM) && |
2e161f78 JB |
2764 | (sdata->vif.type == NL80211_IFTYPE_AP || |
2765 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN)) | |
2766 | return RX_DROP_MONITOR; | |
026331c4 | 2767 | |
4b5ebccc JB |
2768 | if (is_multicast_ether_addr(mgmt->da)) |
2769 | return RX_DROP_MONITOR; | |
2770 | ||
84040805 JB |
2771 | /* do not return rejected action frames */ |
2772 | if (mgmt->u.action.category & 0x80) | |
2773 | return RX_DROP_UNUSABLE; | |
2774 | ||
2775 | nskb = skb_copy_expand(rx->skb, local->hw.extra_tx_headroom, 0, | |
2776 | GFP_ATOMIC); | |
2777 | if (nskb) { | |
292b4df6 | 2778 | struct ieee80211_mgmt *nmgmt = (void *)nskb->data; |
84040805 | 2779 | |
292b4df6 JL |
2780 | nmgmt->u.action.category |= 0x80; |
2781 | memcpy(nmgmt->da, nmgmt->sa, ETH_ALEN); | |
2782 | memcpy(nmgmt->sa, rx->sdata->vif.addr, ETH_ALEN); | |
84040805 JB |
2783 | |
2784 | memset(nskb->cb, 0, sizeof(nskb->cb)); | |
2785 | ||
07e5a5f5 JB |
2786 | if (rx->sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) { |
2787 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(nskb); | |
2788 | ||
2789 | info->flags = IEEE80211_TX_CTL_TX_OFFCHAN | | |
2790 | IEEE80211_TX_INTFL_OFFCHAN_TX_OK | | |
2791 | IEEE80211_TX_CTL_NO_CCK_RATE; | |
2792 | if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) | |
2793 | info->hw_queue = | |
2794 | local->hw.offchannel_tx_hw_queue; | |
2795 | } | |
2796 | ||
2797 | __ieee80211_tx_skb_tid_band(rx->sdata, nskb, 7, | |
2798 | status->band); | |
de1ede7a | 2799 | } |
39192c0b JB |
2800 | dev_kfree_skb(rx->skb); |
2801 | return RX_QUEUED; | |
de1ede7a JB |
2802 | } |
2803 | ||
49461622 | 2804 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 2805 | ieee80211_rx_h_mgmt(struct ieee80211_rx_data *rx) |
571ecf67 | 2806 | { |
eb9fb5b8 | 2807 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
77a121c3 JB |
2808 | struct ieee80211_mgmt *mgmt = (void *)rx->skb->data; |
2809 | __le16 stype; | |
571ecf67 | 2810 | |
77a121c3 | 2811 | stype = mgmt->frame_control & cpu_to_le16(IEEE80211_FCTL_STYPE); |
472dbc45 | 2812 | |
77a121c3 JB |
2813 | if (!ieee80211_vif_is_mesh(&sdata->vif) && |
2814 | sdata->vif.type != NL80211_IFTYPE_ADHOC && | |
2815 | sdata->vif.type != NL80211_IFTYPE_STATION) | |
2816 | return RX_DROP_MONITOR; | |
472dbc45 | 2817 | |
77a121c3 | 2818 | switch (stype) { |
66e67e41 | 2819 | case cpu_to_le16(IEEE80211_STYPE_AUTH): |
77a121c3 JB |
2820 | case cpu_to_le16(IEEE80211_STYPE_BEACON): |
2821 | case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP): | |
2822 | /* process for all: mesh, mlme, ibss */ | |
2823 | break; | |
66e67e41 JB |
2824 | case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP): |
2825 | case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP): | |
77a121c3 JB |
2826 | case cpu_to_le16(IEEE80211_STYPE_DEAUTH): |
2827 | case cpu_to_le16(IEEE80211_STYPE_DISASSOC): | |
2c31333a CL |
2828 | if (is_multicast_ether_addr(mgmt->da) && |
2829 | !is_broadcast_ether_addr(mgmt->da)) | |
2830 | return RX_DROP_MONITOR; | |
2831 | ||
77a121c3 JB |
2832 | /* process only for station */ |
2833 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
2834 | return RX_DROP_MONITOR; | |
2835 | break; | |
2836 | case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ): | |
9fb04b50 TP |
2837 | /* process only for ibss and mesh */ |
2838 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC && | |
2839 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT) | |
77a121c3 JB |
2840 | return RX_DROP_MONITOR; |
2841 | break; | |
2842 | default: | |
2843 | return RX_DROP_MONITOR; | |
2844 | } | |
f9d540ee | 2845 | |
77a121c3 | 2846 | /* queue up frame and kick off work to process it */ |
c1475ca9 | 2847 | rx->skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; |
77a121c3 JB |
2848 | skb_queue_tail(&sdata->skb_queue, rx->skb); |
2849 | ieee80211_queue_work(&rx->local->hw, &sdata->work); | |
8b58ff83 JB |
2850 | if (rx->sta) |
2851 | rx->sta->rx_packets++; | |
46900298 | 2852 | |
77a121c3 | 2853 | return RX_QUEUED; |
571ecf67 JB |
2854 | } |
2855 | ||
5cf121c3 | 2856 | /* TODO: use IEEE80211_RX_FRAGMENTED */ |
5f0b7de5 JB |
2857 | static void ieee80211_rx_cooked_monitor(struct ieee80211_rx_data *rx, |
2858 | struct ieee80211_rate *rate) | |
3d30d949 MW |
2859 | { |
2860 | struct ieee80211_sub_if_data *sdata; | |
2861 | struct ieee80211_local *local = rx->local; | |
3d30d949 MW |
2862 | struct sk_buff *skb = rx->skb, *skb2; |
2863 | struct net_device *prev_dev = NULL; | |
eb9fb5b8 | 2864 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
293702a3 | 2865 | int needed_headroom; |
3d30d949 | 2866 | |
554891e6 JB |
2867 | /* |
2868 | * If cooked monitor has been processed already, then | |
2869 | * don't do it again. If not, set the flag. | |
2870 | */ | |
2871 | if (rx->flags & IEEE80211_RX_CMNTR) | |
7c1e1831 | 2872 | goto out_free_skb; |
554891e6 | 2873 | rx->flags |= IEEE80211_RX_CMNTR; |
7c1e1831 | 2874 | |
152c477a JB |
2875 | /* If there are no cooked monitor interfaces, just free the SKB */ |
2876 | if (!local->cooked_mntrs) | |
2877 | goto out_free_skb; | |
2878 | ||
293702a3 | 2879 | /* room for the radiotap header based on driver features */ |
90b9e446 | 2880 | needed_headroom = ieee80211_rx_radiotap_space(local, status); |
3d30d949 | 2881 | |
293702a3 JB |
2882 | if (skb_headroom(skb) < needed_headroom && |
2883 | pskb_expand_head(skb, needed_headroom, 0, GFP_ATOMIC)) | |
2884 | goto out_free_skb; | |
3d30d949 | 2885 | |
293702a3 | 2886 | /* prepend radiotap information */ |
973ef21a FF |
2887 | ieee80211_add_rx_radiotap_header(local, skb, rate, needed_headroom, |
2888 | false); | |
3d30d949 MW |
2889 | |
2890 | skb_set_mac_header(skb, 0); | |
2891 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
2892 | skb->pkt_type = PACKET_OTHERHOST; | |
2893 | skb->protocol = htons(ETH_P_802_2); | |
2894 | ||
2895 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
9607e6b6 | 2896 | if (!ieee80211_sdata_running(sdata)) |
3d30d949 MW |
2897 | continue; |
2898 | ||
05c914fe | 2899 | if (sdata->vif.type != NL80211_IFTYPE_MONITOR || |
3d30d949 MW |
2900 | !(sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES)) |
2901 | continue; | |
2902 | ||
2903 | if (prev_dev) { | |
2904 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
2905 | if (skb2) { | |
2906 | skb2->dev = prev_dev; | |
5548a8a1 | 2907 | netif_receive_skb(skb2); |
3d30d949 MW |
2908 | } |
2909 | } | |
2910 | ||
2911 | prev_dev = sdata->dev; | |
2912 | sdata->dev->stats.rx_packets++; | |
2913 | sdata->dev->stats.rx_bytes += skb->len; | |
2914 | } | |
2915 | ||
2916 | if (prev_dev) { | |
2917 | skb->dev = prev_dev; | |
5548a8a1 | 2918 | netif_receive_skb(skb); |
554891e6 JB |
2919 | return; |
2920 | } | |
3d30d949 MW |
2921 | |
2922 | out_free_skb: | |
2923 | dev_kfree_skb(skb); | |
2924 | } | |
2925 | ||
aa0c8636 CL |
2926 | static void ieee80211_rx_handlers_result(struct ieee80211_rx_data *rx, |
2927 | ieee80211_rx_result res) | |
2928 | { | |
2929 | switch (res) { | |
2930 | case RX_DROP_MONITOR: | |
2931 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_drop); | |
2932 | if (rx->sta) | |
2933 | rx->sta->rx_dropped++; | |
2934 | /* fall through */ | |
2935 | case RX_CONTINUE: { | |
2936 | struct ieee80211_rate *rate = NULL; | |
2937 | struct ieee80211_supported_band *sband; | |
2938 | struct ieee80211_rx_status *status; | |
2939 | ||
2940 | status = IEEE80211_SKB_RXCB((rx->skb)); | |
2941 | ||
2942 | sband = rx->local->hw.wiphy->bands[status->band]; | |
5614618e JB |
2943 | if (!(status->flag & RX_FLAG_HT) && |
2944 | !(status->flag & RX_FLAG_VHT)) | |
aa0c8636 CL |
2945 | rate = &sband->bitrates[status->rate_idx]; |
2946 | ||
2947 | ieee80211_rx_cooked_monitor(rx, rate); | |
2948 | break; | |
2949 | } | |
2950 | case RX_DROP_UNUSABLE: | |
2951 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_drop); | |
2952 | if (rx->sta) | |
2953 | rx->sta->rx_dropped++; | |
2954 | dev_kfree_skb(rx->skb); | |
2955 | break; | |
2956 | case RX_QUEUED: | |
2957 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_queued); | |
2958 | break; | |
2959 | } | |
2960 | } | |
571ecf67 | 2961 | |
f9e124fb CL |
2962 | static void ieee80211_rx_handlers(struct ieee80211_rx_data *rx, |
2963 | struct sk_buff_head *frames) | |
58905290 | 2964 | { |
58905290 | 2965 | ieee80211_rx_result res = RX_DROP_MONITOR; |
aa0c8636 | 2966 | struct sk_buff *skb; |
8944b79f | 2967 | |
e32f85f7 LCC |
2968 | #define CALL_RXH(rxh) \ |
2969 | do { \ | |
2970 | res = rxh(rx); \ | |
2971 | if (res != RX_CONTINUE) \ | |
2569a826 | 2972 | goto rxh_next; \ |
e32f85f7 | 2973 | } while (0); |
49461622 | 2974 | |
f9e124fb | 2975 | spin_lock_bh(&rx->local->rx_path_lock); |
24a8fdad | 2976 | |
f9e124fb | 2977 | while ((skb = __skb_dequeue(frames))) { |
2569a826 JB |
2978 | /* |
2979 | * all the other fields are valid across frames | |
2980 | * that belong to an aMPDU since they are on the | |
2981 | * same TID from the same station | |
2982 | */ | |
2983 | rx->skb = skb; | |
2984 | ||
2569a826 | 2985 | CALL_RXH(ieee80211_rx_h_check_more_data) |
47086fc5 | 2986 | CALL_RXH(ieee80211_rx_h_uapsd_and_pspoll) |
2569a826 | 2987 | CALL_RXH(ieee80211_rx_h_sta_process) |
86c228a7 | 2988 | CALL_RXH(ieee80211_rx_h_decrypt) |
2569a826 | 2989 | CALL_RXH(ieee80211_rx_h_defragment) |
2569a826 JB |
2990 | CALL_RXH(ieee80211_rx_h_michael_mic_verify) |
2991 | /* must be after MMIC verify so header is counted in MPDU mic */ | |
bf94e17b | 2992 | #ifdef CONFIG_MAC80211_MESH |
aa0c8636 | 2993 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) |
2569a826 | 2994 | CALL_RXH(ieee80211_rx_h_mesh_fwding); |
bf94e17b | 2995 | #endif |
2154c81c | 2996 | CALL_RXH(ieee80211_rx_h_amsdu) |
2569a826 | 2997 | CALL_RXH(ieee80211_rx_h_data) |
f9e124fb CL |
2998 | |
2999 | /* special treatment -- needs the queue */ | |
3000 | res = ieee80211_rx_h_ctrl(rx, frames); | |
3001 | if (res != RX_CONTINUE) | |
3002 | goto rxh_next; | |
3003 | ||
2e161f78 | 3004 | CALL_RXH(ieee80211_rx_h_mgmt_check) |
2569a826 | 3005 | CALL_RXH(ieee80211_rx_h_action) |
2e161f78 JB |
3006 | CALL_RXH(ieee80211_rx_h_userspace_mgmt) |
3007 | CALL_RXH(ieee80211_rx_h_action_return) | |
2569a826 | 3008 | CALL_RXH(ieee80211_rx_h_mgmt) |
49461622 | 3009 | |
aa0c8636 CL |
3010 | rxh_next: |
3011 | ieee80211_rx_handlers_result(rx, res); | |
f9e124fb | 3012 | |
49461622 | 3013 | #undef CALL_RXH |
aa0c8636 | 3014 | } |
24a8fdad | 3015 | |
f9e124fb | 3016 | spin_unlock_bh(&rx->local->rx_path_lock); |
aa0c8636 CL |
3017 | } |
3018 | ||
4406c376 | 3019 | static void ieee80211_invoke_rx_handlers(struct ieee80211_rx_data *rx) |
aa0c8636 | 3020 | { |
f9e124fb | 3021 | struct sk_buff_head reorder_release; |
aa0c8636 CL |
3022 | ieee80211_rx_result res = RX_DROP_MONITOR; |
3023 | ||
f9e124fb CL |
3024 | __skb_queue_head_init(&reorder_release); |
3025 | ||
aa0c8636 CL |
3026 | #define CALL_RXH(rxh) \ |
3027 | do { \ | |
3028 | res = rxh(rx); \ | |
3029 | if (res != RX_CONTINUE) \ | |
3030 | goto rxh_next; \ | |
3031 | } while (0); | |
3032 | ||
aa0c8636 CL |
3033 | CALL_RXH(ieee80211_rx_h_check) |
3034 | ||
f9e124fb | 3035 | ieee80211_rx_reorder_ampdu(rx, &reorder_release); |
aa0c8636 | 3036 | |
f9e124fb | 3037 | ieee80211_rx_handlers(rx, &reorder_release); |
aa0c8636 | 3038 | return; |
49461622 | 3039 | |
2569a826 | 3040 | rxh_next: |
aa0c8636 CL |
3041 | ieee80211_rx_handlers_result(rx, res); |
3042 | ||
3043 | #undef CALL_RXH | |
58905290 JB |
3044 | } |
3045 | ||
2bff8ebf | 3046 | /* |
dd318575 JB |
3047 | * This function makes calls into the RX path, therefore |
3048 | * it has to be invoked under RCU read lock. | |
2bff8ebf CL |
3049 | */ |
3050 | void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid) | |
3051 | { | |
f9e124fb | 3052 | struct sk_buff_head frames; |
554891e6 JB |
3053 | struct ieee80211_rx_data rx = { |
3054 | .sta = sta, | |
3055 | .sdata = sta->sdata, | |
3056 | .local = sta->local, | |
9e26297a JB |
3057 | /* This is OK -- must be QoS data frame */ |
3058 | .security_idx = tid, | |
3059 | .seqno_idx = tid, | |
fcf8bd3b | 3060 | .flags = 0, |
554891e6 | 3061 | }; |
2c15a0cf CL |
3062 | struct tid_ampdu_rx *tid_agg_rx; |
3063 | ||
3064 | tid_agg_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]); | |
3065 | if (!tid_agg_rx) | |
3066 | return; | |
2bff8ebf | 3067 | |
f9e124fb CL |
3068 | __skb_queue_head_init(&frames); |
3069 | ||
2c15a0cf | 3070 | spin_lock(&tid_agg_rx->reorder_lock); |
f9e124fb | 3071 | ieee80211_sta_reorder_release(sta->sdata, tid_agg_rx, &frames); |
2c15a0cf | 3072 | spin_unlock(&tid_agg_rx->reorder_lock); |
2bff8ebf | 3073 | |
f9e124fb | 3074 | ieee80211_rx_handlers(&rx, &frames); |
2bff8ebf CL |
3075 | } |
3076 | ||
571ecf67 JB |
3077 | /* main receive path */ |
3078 | ||
20b01f80 | 3079 | static int prepare_for_handlers(struct ieee80211_rx_data *rx, |
23a24def JB |
3080 | struct ieee80211_hdr *hdr) |
3081 | { | |
20b01f80 | 3082 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
eb9fb5b8 JB |
3083 | struct sk_buff *skb = rx->skb; |
3084 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
3085 | u8 *bssid = ieee80211_get_bssid(hdr, skb->len, sdata->vif.type); | |
23a24def JB |
3086 | int multicast = is_multicast_ether_addr(hdr->addr1); |
3087 | ||
51fb61e7 | 3088 | switch (sdata->vif.type) { |
05c914fe | 3089 | case NL80211_IFTYPE_STATION: |
9bc383de | 3090 | if (!bssid && !sdata->u.mgd.use_4addr) |
23a24def | 3091 | return 0; |
77fdaa12 | 3092 | if (!multicast && |
b203ca39 | 3093 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) { |
4f312336 FF |
3094 | if (!(sdata->dev->flags & IFF_PROMISC) || |
3095 | sdata->u.mgd.use_4addr) | |
23a24def | 3096 | return 0; |
554891e6 | 3097 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
23a24def JB |
3098 | } |
3099 | break; | |
05c914fe | 3100 | case NL80211_IFTYPE_ADHOC: |
23a24def JB |
3101 | if (!bssid) |
3102 | return 0; | |
6329b8d9 FF |
3103 | if (ether_addr_equal(sdata->vif.addr, hdr->addr2) || |
3104 | ether_addr_equal(sdata->u.ibss.bssid, hdr->addr2)) | |
3105 | return 0; | |
a7767f95 | 3106 | if (ieee80211_is_beacon(hdr->frame_control)) { |
9d9bf77d | 3107 | return 1; |
d48b2968 JB |
3108 | } else if (!ieee80211_bssid_match(bssid, sdata->u.ibss.bssid)) { |
3109 | return 0; | |
23a24def | 3110 | } else if (!multicast && |
b203ca39 | 3111 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) { |
4150c572 | 3112 | if (!(sdata->dev->flags & IFF_PROMISC)) |
23a24def | 3113 | return 0; |
554891e6 | 3114 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
0fb8ca45 JM |
3115 | } else if (!rx->sta) { |
3116 | int rate_idx; | |
5614618e JB |
3117 | if (status->flag & (RX_FLAG_HT | RX_FLAG_VHT)) |
3118 | rate_idx = 0; /* TODO: HT/VHT rates */ | |
0fb8ca45 | 3119 | else |
eb9fb5b8 | 3120 | rate_idx = status->rate_idx; |
8bf11d8d JB |
3121 | ieee80211_ibss_rx_no_sta(sdata, bssid, hdr->addr2, |
3122 | BIT(rate_idx)); | |
0fb8ca45 | 3123 | } |
23a24def | 3124 | break; |
05c914fe | 3125 | case NL80211_IFTYPE_MESH_POINT: |
6032f934 | 3126 | if (!multicast && |
b203ca39 | 3127 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) { |
6032f934 JB |
3128 | if (!(sdata->dev->flags & IFF_PROMISC)) |
3129 | return 0; | |
3130 | ||
554891e6 | 3131 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
6032f934 JB |
3132 | } |
3133 | break; | |
05c914fe JB |
3134 | case NL80211_IFTYPE_AP_VLAN: |
3135 | case NL80211_IFTYPE_AP: | |
23a24def | 3136 | if (!bssid) { |
b203ca39 | 3137 | if (!ether_addr_equal(sdata->vif.addr, hdr->addr1)) |
23a24def | 3138 | return 0; |
f142c6b9 | 3139 | } else if (!ieee80211_bssid_match(bssid, sdata->vif.addr)) { |
3df6eaea JB |
3140 | /* |
3141 | * Accept public action frames even when the | |
3142 | * BSSID doesn't match, this is used for P2P | |
3143 | * and location updates. Note that mac80211 | |
3144 | * itself never looks at these frames. | |
3145 | */ | |
2b9ccd4e JB |
3146 | if (!multicast && |
3147 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) | |
3148 | return 0; | |
d48b2968 | 3149 | if (ieee80211_is_public_action(hdr, skb->len)) |
3df6eaea | 3150 | return 1; |
d48b2968 | 3151 | if (!ieee80211_is_beacon(hdr->frame_control)) |
23a24def | 3152 | return 0; |
554891e6 | 3153 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
23a24def | 3154 | } |
23a24def | 3155 | break; |
05c914fe | 3156 | case NL80211_IFTYPE_WDS: |
a7767f95 | 3157 | if (bssid || !ieee80211_is_data(hdr->frame_control)) |
23a24def | 3158 | return 0; |
b203ca39 | 3159 | if (!ether_addr_equal(sdata->u.wds.remote_addr, hdr->addr2)) |
23a24def JB |
3160 | return 0; |
3161 | break; | |
f142c6b9 JB |
3162 | case NL80211_IFTYPE_P2P_DEVICE: |
3163 | if (!ieee80211_is_public_action(hdr, skb->len) && | |
3164 | !ieee80211_is_probe_req(hdr->frame_control) && | |
3165 | !ieee80211_is_probe_resp(hdr->frame_control) && | |
3166 | !ieee80211_is_beacon(hdr->frame_control)) | |
3167 | return 0; | |
1b737f88 JB |
3168 | if (!ether_addr_equal(sdata->vif.addr, hdr->addr1) && |
3169 | !multicast) | |
f142c6b9 JB |
3170 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
3171 | break; | |
2ca27bcf | 3172 | default: |
fb1c1cd6 | 3173 | /* should never get here */ |
f142c6b9 | 3174 | WARN_ON_ONCE(1); |
fb1c1cd6 | 3175 | break; |
23a24def JB |
3176 | } |
3177 | ||
3178 | return 1; | |
3179 | } | |
3180 | ||
4406c376 JB |
3181 | /* |
3182 | * This function returns whether or not the SKB | |
3183 | * was destined for RX processing or not, which, | |
3184 | * if consume is true, is equivalent to whether | |
3185 | * or not the skb was consumed. | |
3186 | */ | |
3187 | static bool ieee80211_prepare_and_rx_handle(struct ieee80211_rx_data *rx, | |
3188 | struct sk_buff *skb, bool consume) | |
3189 | { | |
3190 | struct ieee80211_local *local = rx->local; | |
3191 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
3192 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
3193 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
4406c376 JB |
3194 | |
3195 | rx->skb = skb; | |
554891e6 | 3196 | status->rx_flags |= IEEE80211_RX_RA_MATCH; |
4406c376 | 3197 | |
40791942 | 3198 | if (!prepare_for_handlers(rx, hdr)) |
4406c376 JB |
3199 | return false; |
3200 | ||
4406c376 JB |
3201 | if (!consume) { |
3202 | skb = skb_copy(skb, GFP_ATOMIC); | |
3203 | if (!skb) { | |
3204 | if (net_ratelimit()) | |
3205 | wiphy_debug(local->hw.wiphy, | |
b305dae4 | 3206 | "failed to copy skb for %s\n", |
4406c376 JB |
3207 | sdata->name); |
3208 | return true; | |
3209 | } | |
3210 | ||
3211 | rx->skb = skb; | |
3212 | } | |
3213 | ||
3214 | ieee80211_invoke_rx_handlers(rx); | |
3215 | return true; | |
3216 | } | |
3217 | ||
571ecf67 | 3218 | /* |
6368e4b1 RR |
3219 | * This is the actual Rx frames handler. as it blongs to Rx path it must |
3220 | * be called with rcu_read_lock protection. | |
571ecf67 | 3221 | */ |
71ebb4aa | 3222 | static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw, |
071d9ac2 | 3223 | struct sk_buff *skb) |
571ecf67 JB |
3224 | { |
3225 | struct ieee80211_local *local = hw_to_local(hw); | |
3226 | struct ieee80211_sub_if_data *sdata; | |
571ecf67 | 3227 | struct ieee80211_hdr *hdr; |
e3cf8b3f | 3228 | __le16 fc; |
5cf121c3 | 3229 | struct ieee80211_rx_data rx; |
4406c376 | 3230 | struct ieee80211_sub_if_data *prev; |
56af3268 | 3231 | struct sta_info *sta, *tmp, *prev_sta; |
e3cf8b3f | 3232 | int err = 0; |
571ecf67 | 3233 | |
e3cf8b3f | 3234 | fc = ((struct ieee80211_hdr *)skb->data)->frame_control; |
571ecf67 JB |
3235 | memset(&rx, 0, sizeof(rx)); |
3236 | rx.skb = skb; | |
3237 | rx.local = local; | |
72abd81b | 3238 | |
e3cf8b3f | 3239 | if (ieee80211_is_data(fc) || ieee80211_is_mgmt(fc)) |
571ecf67 | 3240 | local->dot11ReceivedFragmentCount++; |
571ecf67 | 3241 | |
4a4f1a58 JB |
3242 | if (ieee80211_is_mgmt(fc)) { |
3243 | /* drop frame if too short for header */ | |
3244 | if (skb->len < ieee80211_hdrlen(fc)) | |
3245 | err = -ENOBUFS; | |
3246 | else | |
3247 | err = skb_linearize(skb); | |
3248 | } else { | |
e3cf8b3f | 3249 | err = !pskb_may_pull(skb, ieee80211_hdrlen(fc)); |
4a4f1a58 | 3250 | } |
e3cf8b3f ZY |
3251 | |
3252 | if (err) { | |
3253 | dev_kfree_skb(skb); | |
3254 | return; | |
3255 | } | |
3256 | ||
3257 | hdr = (struct ieee80211_hdr *)skb->data; | |
38f3714d | 3258 | ieee80211_parse_qos(&rx); |
d1c3a37c | 3259 | ieee80211_verify_alignment(&rx); |
38f3714d | 3260 | |
d48b2968 JB |
3261 | if (unlikely(ieee80211_is_probe_resp(hdr->frame_control) || |
3262 | ieee80211_is_beacon(hdr->frame_control))) | |
3263 | ieee80211_scan_rx(local, skb); | |
3264 | ||
e3cf8b3f | 3265 | if (ieee80211_is_data(fc)) { |
56af3268 | 3266 | prev_sta = NULL; |
4406c376 | 3267 | |
7852e361 | 3268 | for_each_sta_info(local, hdr->addr2, sta, tmp) { |
56af3268 BG |
3269 | if (!prev_sta) { |
3270 | prev_sta = sta; | |
3271 | continue; | |
3272 | } | |
3273 | ||
3274 | rx.sta = prev_sta; | |
3275 | rx.sdata = prev_sta->sdata; | |
4406c376 | 3276 | ieee80211_prepare_and_rx_handle(&rx, skb, false); |
abe60632 | 3277 | |
56af3268 | 3278 | prev_sta = sta; |
4406c376 | 3279 | } |
56af3268 BG |
3280 | |
3281 | if (prev_sta) { | |
3282 | rx.sta = prev_sta; | |
3283 | rx.sdata = prev_sta->sdata; | |
3284 | ||
4406c376 | 3285 | if (ieee80211_prepare_and_rx_handle(&rx, skb, true)) |
56af3268 | 3286 | return; |
8e26d5ad | 3287 | goto out; |
56af3268 | 3288 | } |
4406c376 JB |
3289 | } |
3290 | ||
4b0dd98e | 3291 | prev = NULL; |
b2e7771e | 3292 | |
4b0dd98e JB |
3293 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
3294 | if (!ieee80211_sdata_running(sdata)) | |
3295 | continue; | |
340e11f3 | 3296 | |
4b0dd98e JB |
3297 | if (sdata->vif.type == NL80211_IFTYPE_MONITOR || |
3298 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
3299 | continue; | |
340e11f3 | 3300 | |
4b0dd98e JB |
3301 | /* |
3302 | * frame is destined for this interface, but if it's | |
3303 | * not also for the previous one we handle that after | |
3304 | * the loop to avoid copying the SKB once too much | |
3305 | */ | |
4bb29f8c | 3306 | |
4b0dd98e | 3307 | if (!prev) { |
abe60632 | 3308 | prev = sdata; |
4b0dd98e | 3309 | continue; |
340e11f3 | 3310 | } |
4bb29f8c | 3311 | |
7852e361 | 3312 | rx.sta = sta_info_get_bss(prev, hdr->addr2); |
4b0dd98e JB |
3313 | rx.sdata = prev; |
3314 | ieee80211_prepare_and_rx_handle(&rx, skb, false); | |
4bb29f8c | 3315 | |
4b0dd98e JB |
3316 | prev = sdata; |
3317 | } | |
3318 | ||
3319 | if (prev) { | |
7852e361 | 3320 | rx.sta = sta_info_get_bss(prev, hdr->addr2); |
4b0dd98e | 3321 | rx.sdata = prev; |
4406c376 | 3322 | |
4b0dd98e JB |
3323 | if (ieee80211_prepare_and_rx_handle(&rx, skb, true)) |
3324 | return; | |
571ecf67 | 3325 | } |
4406c376 | 3326 | |
8e26d5ad | 3327 | out: |
4406c376 | 3328 | dev_kfree_skb(skb); |
571ecf67 | 3329 | } |
6368e4b1 RR |
3330 | |
3331 | /* | |
3332 | * This is the receive path handler. It is called by a low level driver when an | |
3333 | * 802.11 MPDU is received from the hardware. | |
3334 | */ | |
103bf9f7 | 3335 | void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb) |
6368e4b1 RR |
3336 | { |
3337 | struct ieee80211_local *local = hw_to_local(hw); | |
8318d78a JB |
3338 | struct ieee80211_rate *rate = NULL; |
3339 | struct ieee80211_supported_band *sband; | |
f1d58c25 | 3340 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
8318d78a | 3341 | |
d20ef63d JB |
3342 | WARN_ON_ONCE(softirq_count() == 0); |
3343 | ||
444e3803 | 3344 | if (WARN_ON(status->band >= IEEE80211_NUM_BANDS)) |
77a980dc | 3345 | goto drop; |
8318d78a JB |
3346 | |
3347 | sband = local->hw.wiphy->bands[status->band]; | |
77a980dc JB |
3348 | if (WARN_ON(!sband)) |
3349 | goto drop; | |
8318d78a | 3350 | |
89c3a8ac JB |
3351 | /* |
3352 | * If we're suspending, it is possible although not too likely | |
3353 | * that we'd be receiving frames after having already partially | |
3354 | * quiesced the stack. We can't process such frames then since | |
3355 | * that might, for example, cause stations to be added or other | |
3356 | * driver callbacks be invoked. | |
3357 | */ | |
77a980dc JB |
3358 | if (unlikely(local->quiescing || local->suspended)) |
3359 | goto drop; | |
89c3a8ac | 3360 | |
04800ada AN |
3361 | /* We might be during a HW reconfig, prevent Rx for the same reason */ |
3362 | if (unlikely(local->in_reconfig)) | |
3363 | goto drop; | |
3364 | ||
ea77f12f JB |
3365 | /* |
3366 | * The same happens when we're not even started, | |
3367 | * but that's worth a warning. | |
3368 | */ | |
77a980dc JB |
3369 | if (WARN_ON(!local->started)) |
3370 | goto drop; | |
ea77f12f | 3371 | |
fc885189 | 3372 | if (likely(!(status->flag & RX_FLAG_FAILED_PLCP_CRC))) { |
e5d6eb83 | 3373 | /* |
fc885189 JB |
3374 | * Validate the rate, unless a PLCP error means that |
3375 | * we probably can't have a valid rate here anyway. | |
e5d6eb83 | 3376 | */ |
fc885189 JB |
3377 | |
3378 | if (status->flag & RX_FLAG_HT) { | |
3379 | /* | |
3380 | * rate_idx is MCS index, which can be [0-76] | |
3381 | * as documented on: | |
3382 | * | |
3383 | * http://wireless.kernel.org/en/developers/Documentation/ieee80211/802.11n | |
3384 | * | |
3385 | * Anything else would be some sort of driver or | |
3386 | * hardware error. The driver should catch hardware | |
3387 | * errors. | |
3388 | */ | |
444e3803 | 3389 | if (WARN(status->rate_idx > 76, |
fc885189 JB |
3390 | "Rate marked as an HT rate but passed " |
3391 | "status->rate_idx is not " | |
3392 | "an MCS index [0-76]: %d (0x%02x)\n", | |
3393 | status->rate_idx, | |
3394 | status->rate_idx)) | |
3395 | goto drop; | |
5614618e JB |
3396 | } else if (status->flag & RX_FLAG_VHT) { |
3397 | if (WARN_ONCE(status->rate_idx > 9 || | |
3398 | !status->vht_nss || | |
3399 | status->vht_nss > 8, | |
3400 | "Rate marked as a VHT rate but data is invalid: MCS: %d, NSS: %d\n", | |
3401 | status->rate_idx, status->vht_nss)) | |
3402 | goto drop; | |
fc885189 | 3403 | } else { |
444e3803 | 3404 | if (WARN_ON(status->rate_idx >= sband->n_bitrates)) |
fc885189 JB |
3405 | goto drop; |
3406 | rate = &sband->bitrates[status->rate_idx]; | |
3407 | } | |
0fb8ca45 | 3408 | } |
6368e4b1 | 3409 | |
554891e6 JB |
3410 | status->rx_flags = 0; |
3411 | ||
6368e4b1 RR |
3412 | /* |
3413 | * key references and virtual interfaces are protected using RCU | |
3414 | * and this requires that we are in a read-side RCU section during | |
3415 | * receive processing | |
3416 | */ | |
3417 | rcu_read_lock(); | |
3418 | ||
3419 | /* | |
3420 | * Frames with failed FCS/PLCP checksum are not returned, | |
3421 | * all other frames are returned without radiotap header | |
3422 | * if it was previously present. | |
3423 | * Also, frames with less than 16 bytes are dropped. | |
3424 | */ | |
f1d58c25 | 3425 | skb = ieee80211_rx_monitor(local, skb, rate); |
6368e4b1 RR |
3426 | if (!skb) { |
3427 | rcu_read_unlock(); | |
3428 | return; | |
3429 | } | |
3430 | ||
e1e54068 JB |
3431 | ieee80211_tpt_led_trig_rx(local, |
3432 | ((struct ieee80211_hdr *)skb->data)->frame_control, | |
3433 | skb->len); | |
071d9ac2 | 3434 | __ieee80211_rx_handle_packet(hw, skb); |
6368e4b1 RR |
3435 | |
3436 | rcu_read_unlock(); | |
77a980dc JB |
3437 | |
3438 | return; | |
3439 | drop: | |
3440 | kfree_skb(skb); | |
6368e4b1 | 3441 | } |
103bf9f7 | 3442 | EXPORT_SYMBOL(ieee80211_rx); |
571ecf67 JB |
3443 | |
3444 | /* This is a version of the rx handler that can be called from hard irq | |
3445 | * context. Post the skb on the queue and schedule the tasklet */ | |
f1d58c25 | 3446 | void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb) |
571ecf67 JB |
3447 | { |
3448 | struct ieee80211_local *local = hw_to_local(hw); | |
3449 | ||
3450 | BUILD_BUG_ON(sizeof(struct ieee80211_rx_status) > sizeof(skb->cb)); | |
3451 | ||
571ecf67 JB |
3452 | skb->pkt_type = IEEE80211_RX_MSG; |
3453 | skb_queue_tail(&local->skb_queue, skb); | |
3454 | tasklet_schedule(&local->tasklet); | |
3455 | } | |
3456 | EXPORT_SYMBOL(ieee80211_rx_irqsafe); |