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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> |
d98ad83e | 6 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
571ecf67 JB |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | */ | |
12 | ||
ab46623e | 13 | #include <linux/jiffies.h> |
5a0e3ad6 | 14 | #include <linux/slab.h> |
571ecf67 JB |
15 | #include <linux/kernel.h> |
16 | #include <linux/skbuff.h> | |
17 | #include <linux/netdevice.h> | |
18 | #include <linux/etherdevice.h> | |
d4e46a3d | 19 | #include <linux/rcupdate.h> |
bc3b2d7f | 20 | #include <linux/export.h> |
571ecf67 JB |
21 | #include <net/mac80211.h> |
22 | #include <net/ieee80211_radiotap.h> | |
d26ad377 | 23 | #include <asm/unaligned.h> |
571ecf67 JB |
24 | |
25 | #include "ieee80211_i.h" | |
24487981 | 26 | #include "driver-ops.h" |
2c8dccc7 | 27 | #include "led.h" |
33b64eb2 | 28 | #include "mesh.h" |
571ecf67 JB |
29 | #include "wep.h" |
30 | #include "wpa.h" | |
31 | #include "tkip.h" | |
32 | #include "wme.h" | |
1d8d3dec | 33 | #include "rate.h" |
571ecf67 | 34 | |
b2e7771e JB |
35 | /* |
36 | * monitor mode reception | |
37 | * | |
38 | * This function cleans up the SKB, i.e. it removes all the stuff | |
39 | * only useful for monitoring. | |
40 | */ | |
41 | static struct sk_buff *remove_monitor_info(struct ieee80211_local *local, | |
0869aea0 | 42 | struct sk_buff *skb) |
b2e7771e | 43 | { |
b2e7771e JB |
44 | if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) { |
45 | if (likely(skb->len > FCS_LEN)) | |
e3cf8b3f | 46 | __pskb_trim(skb, skb->len - FCS_LEN); |
b2e7771e JB |
47 | else { |
48 | /* driver bug */ | |
49 | WARN_ON(1); | |
50 | dev_kfree_skb(skb); | |
0624760c | 51 | return NULL; |
b2e7771e JB |
52 | } |
53 | } | |
54 | ||
55 | return skb; | |
56 | } | |
57 | ||
6b59db7d | 58 | static inline bool should_drop_frame(struct sk_buff *skb, int present_fcs_len) |
b2e7771e | 59 | { |
f1d58c25 | 60 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
6b59db7d | 61 | struct ieee80211_hdr *hdr = (void *)skb->data; |
b2e7771e | 62 | |
4c298677 JB |
63 | if (status->flag & (RX_FLAG_FAILED_FCS_CRC | |
64 | RX_FLAG_FAILED_PLCP_CRC | | |
65 | RX_FLAG_AMPDU_IS_ZEROLEN)) | |
6b59db7d ZG |
66 | return true; |
67 | ||
0059b2b1 | 68 | if (unlikely(skb->len < 16 + present_fcs_len)) |
6b59db7d ZG |
69 | return true; |
70 | ||
87228f57 HH |
71 | if (ieee80211_is_ctl(hdr->frame_control) && |
72 | !ieee80211_is_pspoll(hdr->frame_control) && | |
73 | !ieee80211_is_back_req(hdr->frame_control)) | |
6b59db7d ZG |
74 | return true; |
75 | ||
76 | return false; | |
b2e7771e JB |
77 | } |
78 | ||
601ae7f2 | 79 | static int |
90b9e446 JB |
80 | ieee80211_rx_radiotap_space(struct ieee80211_local *local, |
81 | struct ieee80211_rx_status *status) | |
601ae7f2 BR |
82 | { |
83 | int len; | |
84 | ||
85 | /* always present fields */ | |
a144f378 | 86 | len = sizeof(struct ieee80211_radiotap_header) + 8; |
601ae7f2 | 87 | |
a144f378 | 88 | /* allocate extra bitmaps */ |
a144f378 JB |
89 | if (status->chains) |
90 | len += 4 * hweight8(status->chains); | |
90b9e446 JB |
91 | |
92 | if (ieee80211_have_rx_timestamp(status)) { | |
93 | len = ALIGN(len, 8); | |
601ae7f2 | 94 | len += 8; |
90b9e446 | 95 | } |
7fee5372 | 96 | if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) |
601ae7f2 | 97 | len += 1; |
601ae7f2 | 98 | |
a144f378 JB |
99 | /* antenna field, if we don't have per-chain info */ |
100 | if (!status->chains) | |
101 | len += 1; | |
102 | ||
90b9e446 JB |
103 | /* padding for RX_FLAGS if necessary */ |
104 | len = ALIGN(len, 2); | |
601ae7f2 | 105 | |
6d744bac JB |
106 | if (status->flag & RX_FLAG_HT) /* HT info */ |
107 | len += 3; | |
108 | ||
4c298677 | 109 | if (status->flag & RX_FLAG_AMPDU_DETAILS) { |
90b9e446 | 110 | len = ALIGN(len, 4); |
4c298677 JB |
111 | len += 8; |
112 | } | |
113 | ||
51648921 JB |
114 | if (status->flag & RX_FLAG_VHT) { |
115 | len = ALIGN(len, 2); | |
116 | len += 12; | |
117 | } | |
118 | ||
a144f378 JB |
119 | if (status->chains) { |
120 | /* antenna and antenna signal fields */ | |
121 | len += 2 * hweight8(status->chains); | |
122 | } | |
123 | ||
601ae7f2 BR |
124 | return len; |
125 | } | |
126 | ||
00ea6deb | 127 | /* |
601ae7f2 BR |
128 | * ieee80211_add_rx_radiotap_header - add radiotap header |
129 | * | |
130 | * add a radiotap header containing all the fields which the hardware provided. | |
131 | */ | |
132 | static void | |
133 | ieee80211_add_rx_radiotap_header(struct ieee80211_local *local, | |
134 | struct sk_buff *skb, | |
601ae7f2 | 135 | struct ieee80211_rate *rate, |
973ef21a | 136 | int rtap_len, bool has_fcs) |
601ae7f2 | 137 | { |
f1d58c25 | 138 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
601ae7f2 BR |
139 | struct ieee80211_radiotap_header *rthdr; |
140 | unsigned char *pos; | |
a144f378 JB |
141 | __le32 *it_present; |
142 | u32 it_present_val; | |
6a86b9c7 | 143 | u16 rx_flags = 0; |
a5e70697 | 144 | u16 channel_flags = 0; |
a144f378 JB |
145 | int mpdulen, chain; |
146 | unsigned long chains = status->chains; | |
f4bda337 TP |
147 | |
148 | mpdulen = skb->len; | |
149 | if (!(has_fcs && (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS))) | |
150 | mpdulen += FCS_LEN; | |
601ae7f2 BR |
151 | |
152 | rthdr = (struct ieee80211_radiotap_header *)skb_push(skb, rtap_len); | |
153 | memset(rthdr, 0, rtap_len); | |
a144f378 | 154 | it_present = &rthdr->it_present; |
601ae7f2 BR |
155 | |
156 | /* radiotap header, set always present flags */ | |
0059b2b1 | 157 | rthdr->it_len = cpu_to_le16(rtap_len); |
a144f378 JB |
158 | it_present_val = BIT(IEEE80211_RADIOTAP_FLAGS) | |
159 | BIT(IEEE80211_RADIOTAP_CHANNEL) | | |
160 | BIT(IEEE80211_RADIOTAP_RX_FLAGS); | |
161 | ||
162 | if (!status->chains) | |
163 | it_present_val |= BIT(IEEE80211_RADIOTAP_ANTENNA); | |
164 | ||
165 | for_each_set_bit(chain, &chains, IEEE80211_MAX_CHAINS) { | |
166 | it_present_val |= | |
167 | BIT(IEEE80211_RADIOTAP_EXT) | | |
168 | BIT(IEEE80211_RADIOTAP_RADIOTAP_NAMESPACE); | |
169 | put_unaligned_le32(it_present_val, it_present); | |
170 | it_present++; | |
171 | it_present_val = BIT(IEEE80211_RADIOTAP_ANTENNA) | | |
172 | BIT(IEEE80211_RADIOTAP_DBM_ANTSIGNAL); | |
173 | } | |
601ae7f2 | 174 | |
a144f378 JB |
175 | put_unaligned_le32(it_present_val, it_present); |
176 | ||
177 | pos = (void *)(it_present + 1); | |
178 | ||
601ae7f2 BR |
179 | /* the order of the following fields is important */ |
180 | ||
181 | /* IEEE80211_RADIOTAP_TSFT */ | |
f4bda337 | 182 | if (ieee80211_have_rx_timestamp(status)) { |
90b9e446 JB |
183 | /* padding */ |
184 | while ((pos - (u8 *)rthdr) & 7) | |
185 | *pos++ = 0; | |
f4bda337 TP |
186 | put_unaligned_le64( |
187 | ieee80211_calculate_rx_timestamp(local, status, | |
188 | mpdulen, 0), | |
189 | pos); | |
1df332e8 | 190 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_TSFT); |
601ae7f2 BR |
191 | pos += 8; |
192 | } | |
193 | ||
194 | /* IEEE80211_RADIOTAP_FLAGS */ | |
973ef21a | 195 | if (has_fcs && (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS)) |
601ae7f2 | 196 | *pos |= IEEE80211_RADIOTAP_F_FCS; |
aae89831 JB |
197 | if (status->flag & (RX_FLAG_FAILED_FCS_CRC | RX_FLAG_FAILED_PLCP_CRC)) |
198 | *pos |= IEEE80211_RADIOTAP_F_BADFCS; | |
b4f28bbb BR |
199 | if (status->flag & RX_FLAG_SHORTPRE) |
200 | *pos |= IEEE80211_RADIOTAP_F_SHORTPRE; | |
601ae7f2 BR |
201 | pos++; |
202 | ||
203 | /* IEEE80211_RADIOTAP_RATE */ | |
5614618e | 204 | if (!rate || status->flag & (RX_FLAG_HT | RX_FLAG_VHT)) { |
0fb8ca45 | 205 | /* |
f8d1ccf1 | 206 | * Without rate information don't add it. If we have, |
38f37be2 | 207 | * MCS information is a separate field in radiotap, |
73b48099 JB |
208 | * added below. The byte here is needed as padding |
209 | * for the channel though, so initialise it to 0. | |
0fb8ca45 JM |
210 | */ |
211 | *pos = 0; | |
8d6f658e | 212 | } else { |
2103dec1 | 213 | int shift = 0; |
ebe6c7ba | 214 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE); |
2103dec1 SW |
215 | if (status->flag & RX_FLAG_10MHZ) |
216 | shift = 1; | |
217 | else if (status->flag & RX_FLAG_5MHZ) | |
218 | shift = 2; | |
219 | *pos = DIV_ROUND_UP(rate->bitrate, 5 * (1 << shift)); | |
8d6f658e | 220 | } |
601ae7f2 BR |
221 | pos++; |
222 | ||
223 | /* IEEE80211_RADIOTAP_CHANNEL */ | |
6a86b9c7 | 224 | put_unaligned_le16(status->freq, pos); |
601ae7f2 | 225 | pos += 2; |
a5e70697 SW |
226 | if (status->flag & RX_FLAG_10MHZ) |
227 | channel_flags |= IEEE80211_CHAN_HALF; | |
228 | else if (status->flag & RX_FLAG_5MHZ) | |
229 | channel_flags |= IEEE80211_CHAN_QUARTER; | |
230 | ||
601ae7f2 | 231 | if (status->band == IEEE80211_BAND_5GHZ) |
a5e70697 | 232 | channel_flags |= IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ; |
5614618e | 233 | else if (status->flag & (RX_FLAG_HT | RX_FLAG_VHT)) |
a5e70697 | 234 | channel_flags |= IEEE80211_CHAN_DYN | IEEE80211_CHAN_2GHZ; |
f8d1ccf1 | 235 | else if (rate && rate->flags & IEEE80211_RATE_ERP_G) |
a5e70697 | 236 | channel_flags |= IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ; |
f8d1ccf1 | 237 | else if (rate) |
a5e70697 | 238 | channel_flags |= IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ; |
f8d1ccf1 | 239 | else |
a5e70697 SW |
240 | channel_flags |= IEEE80211_CHAN_2GHZ; |
241 | put_unaligned_le16(channel_flags, pos); | |
601ae7f2 BR |
242 | pos += 2; |
243 | ||
244 | /* IEEE80211_RADIOTAP_DBM_ANTSIGNAL */ | |
fe8431f8 FF |
245 | if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM && |
246 | !(status->flag & RX_FLAG_NO_SIGNAL_VAL)) { | |
601ae7f2 BR |
247 | *pos = status->signal; |
248 | rthdr->it_present |= | |
249 | cpu_to_le32(1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL); | |
250 | pos++; | |
251 | } | |
252 | ||
601ae7f2 BR |
253 | /* IEEE80211_RADIOTAP_LOCK_QUALITY is missing */ |
254 | ||
a144f378 JB |
255 | if (!status->chains) { |
256 | /* IEEE80211_RADIOTAP_ANTENNA */ | |
257 | *pos = status->antenna; | |
258 | pos++; | |
259 | } | |
601ae7f2 | 260 | |
601ae7f2 BR |
261 | /* IEEE80211_RADIOTAP_DB_ANTNOISE is not used */ |
262 | ||
263 | /* IEEE80211_RADIOTAP_RX_FLAGS */ | |
264 | /* ensure 2 byte alignment for the 2 byte field as required */ | |
6a86b9c7 | 265 | if ((pos - (u8 *)rthdr) & 1) |
90b9e446 | 266 | *pos++ = 0; |
aae89831 | 267 | if (status->flag & RX_FLAG_FAILED_PLCP_CRC) |
6a86b9c7 JB |
268 | rx_flags |= IEEE80211_RADIOTAP_F_RX_BADPLCP; |
269 | put_unaligned_le16(rx_flags, pos); | |
601ae7f2 | 270 | pos += 2; |
6d744bac JB |
271 | |
272 | if (status->flag & RX_FLAG_HT) { | |
786677d1 OR |
273 | unsigned int stbc; |
274 | ||
6d744bac | 275 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS); |
ac55d2fe | 276 | *pos++ = local->hw.radiotap_mcs_details; |
6d744bac JB |
277 | *pos = 0; |
278 | if (status->flag & RX_FLAG_SHORT_GI) | |
279 | *pos |= IEEE80211_RADIOTAP_MCS_SGI; | |
280 | if (status->flag & RX_FLAG_40MHZ) | |
281 | *pos |= IEEE80211_RADIOTAP_MCS_BW_40; | |
ac55d2fe JB |
282 | if (status->flag & RX_FLAG_HT_GF) |
283 | *pos |= IEEE80211_RADIOTAP_MCS_FMT_GF; | |
63c361f5 EG |
284 | if (status->flag & RX_FLAG_LDPC) |
285 | *pos |= IEEE80211_RADIOTAP_MCS_FEC_LDPC; | |
786677d1 OR |
286 | stbc = (status->flag & RX_FLAG_STBC_MASK) >> RX_FLAG_STBC_SHIFT; |
287 | *pos |= stbc << IEEE80211_RADIOTAP_MCS_STBC_SHIFT; | |
6d744bac JB |
288 | pos++; |
289 | *pos++ = status->rate_idx; | |
290 | } | |
4c298677 JB |
291 | |
292 | if (status->flag & RX_FLAG_AMPDU_DETAILS) { | |
293 | u16 flags = 0; | |
294 | ||
295 | /* ensure 4 byte alignment */ | |
296 | while ((pos - (u8 *)rthdr) & 3) | |
297 | pos++; | |
298 | rthdr->it_present |= | |
299 | cpu_to_le32(1 << IEEE80211_RADIOTAP_AMPDU_STATUS); | |
300 | put_unaligned_le32(status->ampdu_reference, pos); | |
301 | pos += 4; | |
302 | if (status->flag & RX_FLAG_AMPDU_REPORT_ZEROLEN) | |
303 | flags |= IEEE80211_RADIOTAP_AMPDU_REPORT_ZEROLEN; | |
304 | if (status->flag & RX_FLAG_AMPDU_IS_ZEROLEN) | |
305 | flags |= IEEE80211_RADIOTAP_AMPDU_IS_ZEROLEN; | |
306 | if (status->flag & RX_FLAG_AMPDU_LAST_KNOWN) | |
307 | flags |= IEEE80211_RADIOTAP_AMPDU_LAST_KNOWN; | |
308 | if (status->flag & RX_FLAG_AMPDU_IS_LAST) | |
309 | flags |= IEEE80211_RADIOTAP_AMPDU_IS_LAST; | |
310 | if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_ERROR) | |
311 | flags |= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_ERR; | |
312 | if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_KNOWN) | |
313 | flags |= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_KNOWN; | |
314 | put_unaligned_le16(flags, pos); | |
315 | pos += 2; | |
316 | if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_KNOWN) | |
317 | *pos++ = status->ampdu_delimiter_crc; | |
318 | else | |
319 | *pos++ = 0; | |
320 | *pos++ = 0; | |
321 | } | |
90b9e446 | 322 | |
51648921 JB |
323 | if (status->flag & RX_FLAG_VHT) { |
324 | u16 known = local->hw.radiotap_vht_details; | |
325 | ||
326 | rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT); | |
327 | /* known field - how to handle 80+80? */ | |
1b8d242a | 328 | if (status->vht_flag & RX_VHT_FLAG_80P80MHZ) |
51648921 JB |
329 | known &= ~IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH; |
330 | put_unaligned_le16(known, pos); | |
331 | pos += 2; | |
332 | /* flags */ | |
333 | if (status->flag & RX_FLAG_SHORT_GI) | |
334 | *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI; | |
63c361f5 EG |
335 | /* in VHT, STBC is binary */ |
336 | if (status->flag & RX_FLAG_STBC_MASK) | |
337 | *pos |= IEEE80211_RADIOTAP_VHT_FLAG_STBC; | |
fb378c23 EG |
338 | if (status->vht_flag & RX_VHT_FLAG_BF) |
339 | *pos |= IEEE80211_RADIOTAP_VHT_FLAG_BEAMFORMED; | |
51648921 JB |
340 | pos++; |
341 | /* bandwidth */ | |
1b8d242a | 342 | if (status->vht_flag & RX_VHT_FLAG_80MHZ) |
51648921 | 343 | *pos++ = 4; |
1b8d242a | 344 | else if (status->vht_flag & RX_VHT_FLAG_80P80MHZ) |
51648921 | 345 | *pos++ = 0; /* marked not known above */ |
1b8d242a | 346 | else if (status->vht_flag & RX_VHT_FLAG_160MHZ) |
51648921 JB |
347 | *pos++ = 11; |
348 | else if (status->flag & RX_FLAG_40MHZ) | |
349 | *pos++ = 1; | |
350 | else /* 20 MHz */ | |
351 | *pos++ = 0; | |
352 | /* MCS/NSS */ | |
353 | *pos = (status->rate_idx << 4) | status->vht_nss; | |
354 | pos += 4; | |
355 | /* coding field */ | |
63c361f5 EG |
356 | if (status->flag & RX_FLAG_LDPC) |
357 | *pos |= IEEE80211_RADIOTAP_CODING_LDPC_USER0; | |
51648921 JB |
358 | pos++; |
359 | /* group ID */ | |
360 | pos++; | |
361 | /* partial_aid */ | |
362 | pos += 2; | |
363 | } | |
364 | ||
a144f378 JB |
365 | for_each_set_bit(chain, &chains, IEEE80211_MAX_CHAINS) { |
366 | *pos++ = status->chain_signal[chain]; | |
367 | *pos++ = chain; | |
368 | } | |
601ae7f2 BR |
369 | } |
370 | ||
b2e7771e JB |
371 | /* |
372 | * This function copies a received frame to all monitor interfaces and | |
373 | * returns a cleaned-up SKB that no longer includes the FCS nor the | |
374 | * radiotap header the driver might have added. | |
375 | */ | |
376 | static struct sk_buff * | |
377 | ieee80211_rx_monitor(struct ieee80211_local *local, struct sk_buff *origskb, | |
8318d78a | 378 | struct ieee80211_rate *rate) |
b2e7771e | 379 | { |
f1d58c25 | 380 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(origskb); |
b2e7771e | 381 | struct ieee80211_sub_if_data *sdata; |
293702a3 | 382 | int needed_headroom; |
b2e7771e JB |
383 | struct sk_buff *skb, *skb2; |
384 | struct net_device *prev_dev = NULL; | |
385 | int present_fcs_len = 0; | |
b2e7771e JB |
386 | |
387 | /* | |
388 | * First, we may need to make a copy of the skb because | |
389 | * (1) we need to modify it for radiotap (if not present), and | |
390 | * (2) the other RX handlers will modify the skb we got. | |
391 | * | |
392 | * We don't need to, of course, if we aren't going to return | |
393 | * the SKB because it has a bad FCS/PLCP checksum. | |
394 | */ | |
0869aea0 | 395 | |
b2e7771e JB |
396 | if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) |
397 | present_fcs_len = FCS_LEN; | |
398 | ||
0059b2b1 EG |
399 | /* ensure hdr->frame_control is in skb head */ |
400 | if (!pskb_may_pull(origskb, 2)) { | |
e3cf8b3f ZY |
401 | dev_kfree_skb(origskb); |
402 | return NULL; | |
403 | } | |
404 | ||
b2e7771e | 405 | if (!local->monitors) { |
0869aea0 | 406 | if (should_drop_frame(origskb, present_fcs_len)) { |
b2e7771e JB |
407 | dev_kfree_skb(origskb); |
408 | return NULL; | |
409 | } | |
410 | ||
0869aea0 | 411 | return remove_monitor_info(local, origskb); |
b2e7771e JB |
412 | } |
413 | ||
751413ea HS |
414 | /* room for the radiotap header based on driver features */ |
415 | needed_headroom = ieee80211_rx_radiotap_space(local, status); | |
416 | ||
0869aea0 | 417 | if (should_drop_frame(origskb, present_fcs_len)) { |
b2e7771e JB |
418 | /* only need to expand headroom if necessary */ |
419 | skb = origskb; | |
420 | origskb = NULL; | |
421 | ||
422 | /* | |
423 | * This shouldn't trigger often because most devices have an | |
424 | * RX header they pull before we get here, and that should | |
425 | * be big enough for our radiotap information. We should | |
426 | * probably export the length to drivers so that we can have | |
427 | * them allocate enough headroom to start with. | |
428 | */ | |
429 | if (skb_headroom(skb) < needed_headroom && | |
c49e5ea3 | 430 | pskb_expand_head(skb, needed_headroom, 0, GFP_ATOMIC)) { |
b2e7771e JB |
431 | dev_kfree_skb(skb); |
432 | return NULL; | |
433 | } | |
434 | } else { | |
435 | /* | |
436 | * Need to make a copy and possibly remove radiotap header | |
437 | * and FCS from the original. | |
438 | */ | |
439 | skb = skb_copy_expand(origskb, needed_headroom, 0, GFP_ATOMIC); | |
440 | ||
0869aea0 | 441 | origskb = remove_monitor_info(local, origskb); |
b2e7771e JB |
442 | |
443 | if (!skb) | |
444 | return origskb; | |
445 | } | |
446 | ||
0869aea0 | 447 | /* prepend radiotap information */ |
973ef21a FF |
448 | ieee80211_add_rx_radiotap_header(local, skb, rate, needed_headroom, |
449 | true); | |
b2e7771e | 450 | |
ce3edf6d | 451 | skb_reset_mac_header(skb); |
b2e7771e JB |
452 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
453 | skb->pkt_type = PACKET_OTHERHOST; | |
454 | skb->protocol = htons(ETH_P_802_2); | |
455 | ||
456 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
05c914fe | 457 | if (sdata->vif.type != NL80211_IFTYPE_MONITOR) |
b2e7771e JB |
458 | continue; |
459 | ||
3d30d949 MW |
460 | if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) |
461 | continue; | |
462 | ||
9607e6b6 | 463 | if (!ieee80211_sdata_running(sdata)) |
47846c9b JB |
464 | continue; |
465 | ||
b2e7771e JB |
466 | if (prev_dev) { |
467 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
468 | if (skb2) { | |
469 | skb2->dev = prev_dev; | |
5548a8a1 | 470 | netif_receive_skb(skb2); |
b2e7771e JB |
471 | } |
472 | } | |
473 | ||
474 | prev_dev = sdata->dev; | |
475 | sdata->dev->stats.rx_packets++; | |
476 | sdata->dev->stats.rx_bytes += skb->len; | |
477 | } | |
478 | ||
479 | if (prev_dev) { | |
480 | skb->dev = prev_dev; | |
5548a8a1 | 481 | netif_receive_skb(skb); |
b2e7771e JB |
482 | } else |
483 | dev_kfree_skb(skb); | |
484 | ||
485 | return origskb; | |
486 | } | |
487 | ||
5cf121c3 | 488 | static void ieee80211_parse_qos(struct ieee80211_rx_data *rx) |
6e0d114d | 489 | { |
238f74a2 | 490 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
554891e6 | 491 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
9e26297a | 492 | int tid, seqno_idx, security_idx; |
6e0d114d JB |
493 | |
494 | /* does the frame have a qos control field? */ | |
238f74a2 HH |
495 | if (ieee80211_is_data_qos(hdr->frame_control)) { |
496 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
6e0d114d | 497 | /* frame has qos control */ |
238f74a2 | 498 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; |
04b7dcf9 | 499 | if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) |
554891e6 | 500 | status->rx_flags |= IEEE80211_RX_AMSDU; |
9e26297a JB |
501 | |
502 | seqno_idx = tid; | |
503 | security_idx = tid; | |
6e0d114d | 504 | } else { |
1411f9b5 JB |
505 | /* |
506 | * IEEE 802.11-2007, 7.1.3.4.1 ("Sequence Number field"): | |
507 | * | |
508 | * Sequence numbers for management frames, QoS data | |
509 | * frames with a broadcast/multicast address in the | |
510 | * Address 1 field, and all non-QoS data frames sent | |
511 | * by QoS STAs are assigned using an additional single | |
512 | * modulo-4096 counter, [...] | |
513 | * | |
514 | * We also use that counter for non-QoS STAs. | |
515 | */ | |
5a306f58 | 516 | seqno_idx = IEEE80211_NUM_TIDS; |
9e26297a JB |
517 | security_idx = 0; |
518 | if (ieee80211_is_mgmt(hdr->frame_control)) | |
5a306f58 | 519 | security_idx = IEEE80211_NUM_TIDS; |
9e26297a | 520 | tid = 0; |
6e0d114d | 521 | } |
52865dfd | 522 | |
9e26297a JB |
523 | rx->seqno_idx = seqno_idx; |
524 | rx->security_idx = security_idx; | |
6e0d114d JB |
525 | /* Set skb->priority to 1d tag if highest order bit of TID is not set. |
526 | * For now, set skb->priority to 0 for other cases. */ | |
527 | rx->skb->priority = (tid > 7) ? 0 : tid; | |
38f3714d | 528 | } |
6e0d114d | 529 | |
d1c3a37c JB |
530 | /** |
531 | * DOC: Packet alignment | |
532 | * | |
533 | * Drivers always need to pass packets that are aligned to two-byte boundaries | |
534 | * to the stack. | |
535 | * | |
536 | * Additionally, should, if possible, align the payload data in a way that | |
537 | * guarantees that the contained IP header is aligned to a four-byte | |
538 | * boundary. In the case of regular frames, this simply means aligning the | |
539 | * payload to a four-byte boundary (because either the IP header is directly | |
540 | * contained, or IV/RFC1042 headers that have a length divisible by four are | |
59d9cb07 KV |
541 | * in front of it). If the payload data is not properly aligned and the |
542 | * architecture doesn't support efficient unaligned operations, mac80211 | |
543 | * will align the data. | |
d1c3a37c JB |
544 | * |
545 | * With A-MSDU frames, however, the payload data address must yield two modulo | |
546 | * four because there are 14-byte 802.3 headers within the A-MSDU frames that | |
547 | * push the IP header further back to a multiple of four again. Thankfully, the | |
548 | * specs were sane enough this time around to require padding each A-MSDU | |
549 | * subframe to a length that is a multiple of four. | |
550 | * | |
25985edc | 551 | * Padding like Atheros hardware adds which is between the 802.11 header and |
d1c3a37c JB |
552 | * the payload is not supported, the driver is required to move the 802.11 |
553 | * header to be directly in front of the payload in that case. | |
554 | */ | |
555 | static void ieee80211_verify_alignment(struct ieee80211_rx_data *rx) | |
38f3714d | 556 | { |
59d9cb07 KV |
557 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
558 | WARN_ONCE((unsigned long)rx->skb->data & 1, | |
559 | "unaligned packet at 0x%p\n", rx->skb->data); | |
d1c3a37c | 560 | #endif |
6e0d114d JB |
561 | } |
562 | ||
6368e4b1 | 563 | |
571ecf67 JB |
564 | /* rx handlers */ |
565 | ||
3cfcf6ac JM |
566 | static int ieee80211_is_unicast_robust_mgmt_frame(struct sk_buff *skb) |
567 | { | |
568 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
569 | ||
d8ca16db | 570 | if (is_multicast_ether_addr(hdr->addr1)) |
3cfcf6ac JM |
571 | return 0; |
572 | ||
d8ca16db | 573 | return ieee80211_is_robust_mgmt_frame(skb); |
3cfcf6ac JM |
574 | } |
575 | ||
576 | ||
577 | static int ieee80211_is_multicast_robust_mgmt_frame(struct sk_buff *skb) | |
578 | { | |
579 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
580 | ||
d8ca16db | 581 | if (!is_multicast_ether_addr(hdr->addr1)) |
3cfcf6ac JM |
582 | return 0; |
583 | ||
d8ca16db | 584 | return ieee80211_is_robust_mgmt_frame(skb); |
3cfcf6ac JM |
585 | } |
586 | ||
587 | ||
588 | /* Get the BIP key index from MMIE; return -1 if this is not a BIP frame */ | |
589 | static int ieee80211_get_mmie_keyidx(struct sk_buff *skb) | |
590 | { | |
591 | struct ieee80211_mgmt *hdr = (struct ieee80211_mgmt *) skb->data; | |
592 | struct ieee80211_mmie *mmie; | |
593 | ||
1df332e8 | 594 | if (skb->len < 24 + sizeof(*mmie) || !is_multicast_ether_addr(hdr->da)) |
3cfcf6ac JM |
595 | return -1; |
596 | ||
d8ca16db | 597 | if (!ieee80211_is_robust_mgmt_frame(skb)) |
3cfcf6ac JM |
598 | return -1; /* not a robust management frame */ |
599 | ||
600 | mmie = (struct ieee80211_mmie *) | |
601 | (skb->data + skb->len - sizeof(*mmie)); | |
602 | if (mmie->element_id != WLAN_EID_MMIE || | |
603 | mmie->length != sizeof(*mmie) - 2) | |
604 | return -1; | |
605 | ||
606 | return le16_to_cpu(mmie->key_id); | |
607 | } | |
608 | ||
2475b1cc MS |
609 | static int iwl80211_get_cs_keyid(const struct ieee80211_cipher_scheme *cs, |
610 | struct sk_buff *skb) | |
611 | { | |
612 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
613 | __le16 fc; | |
614 | int hdrlen; | |
615 | u8 keyid; | |
616 | ||
617 | fc = hdr->frame_control; | |
618 | hdrlen = ieee80211_hdrlen(fc); | |
619 | ||
620 | if (skb->len < hdrlen + cs->hdr_len) | |
621 | return -EINVAL; | |
622 | ||
623 | skb_copy_bits(skb, hdrlen + cs->key_idx_off, &keyid, 1); | |
624 | keyid &= cs->key_idx_mask; | |
625 | keyid >>= cs->key_idx_shift; | |
626 | ||
627 | return keyid; | |
628 | } | |
629 | ||
1df332e8 | 630 | static ieee80211_rx_result ieee80211_rx_mesh_check(struct ieee80211_rx_data *rx) |
33b64eb2 | 631 | { |
a7767f95 | 632 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
47846c9b | 633 | char *dev_addr = rx->sdata->vif.addr; |
d6d1a5a7 | 634 | |
a7767f95 | 635 | if (ieee80211_is_data(hdr->frame_control)) { |
3c5772a5 JC |
636 | if (is_multicast_ether_addr(hdr->addr1)) { |
637 | if (ieee80211_has_tods(hdr->frame_control) || | |
1df332e8 | 638 | !ieee80211_has_fromds(hdr->frame_control)) |
3c5772a5 | 639 | return RX_DROP_MONITOR; |
b203ca39 | 640 | if (ether_addr_equal(hdr->addr3, dev_addr)) |
3c5772a5 JC |
641 | return RX_DROP_MONITOR; |
642 | } else { | |
643 | if (!ieee80211_has_a4(hdr->frame_control)) | |
644 | return RX_DROP_MONITOR; | |
b203ca39 | 645 | if (ether_addr_equal(hdr->addr4, dev_addr)) |
3c5772a5 JC |
646 | return RX_DROP_MONITOR; |
647 | } | |
33b64eb2 LCC |
648 | } |
649 | ||
650 | /* If there is not an established peer link and this is not a peer link | |
651 | * establisment frame, beacon or probe, drop the frame. | |
652 | */ | |
653 | ||
57cf8043 | 654 | if (!rx->sta || sta_plink_state(rx->sta) != NL80211_PLINK_ESTAB) { |
33b64eb2 | 655 | struct ieee80211_mgmt *mgmt; |
d6d1a5a7 | 656 | |
a7767f95 | 657 | if (!ieee80211_is_mgmt(hdr->frame_control)) |
33b64eb2 LCC |
658 | return RX_DROP_MONITOR; |
659 | ||
a7767f95 | 660 | if (ieee80211_is_action(hdr->frame_control)) { |
d3aaec8a | 661 | u8 category; |
9b395bc3 JB |
662 | |
663 | /* make sure category field is present */ | |
664 | if (rx->skb->len < IEEE80211_MIN_ACTION_SIZE) | |
665 | return RX_DROP_MONITOR; | |
666 | ||
33b64eb2 | 667 | mgmt = (struct ieee80211_mgmt *)hdr; |
d3aaec8a JC |
668 | category = mgmt->u.action.category; |
669 | if (category != WLAN_CATEGORY_MESH_ACTION && | |
1df332e8 | 670 | category != WLAN_CATEGORY_SELF_PROTECTED) |
33b64eb2 | 671 | return RX_DROP_MONITOR; |
33b64eb2 | 672 | return RX_CONTINUE; |
33b64eb2 LCC |
673 | } |
674 | ||
a7767f95 HH |
675 | if (ieee80211_is_probe_req(hdr->frame_control) || |
676 | ieee80211_is_probe_resp(hdr->frame_control) || | |
71839121 JC |
677 | ieee80211_is_beacon(hdr->frame_control) || |
678 | ieee80211_is_auth(hdr->frame_control)) | |
a7767f95 HH |
679 | return RX_CONTINUE; |
680 | ||
681 | return RX_DROP_MONITOR; | |
a7767f95 HH |
682 | } |
683 | ||
902acc78 JB |
684 | return RX_CONTINUE; |
685 | } | |
33b64eb2 | 686 | |
d3b2fb53 | 687 | static void ieee80211_release_reorder_frame(struct ieee80211_sub_if_data *sdata, |
1edfb1af | 688 | struct tid_ampdu_rx *tid_agg_rx, |
f9e124fb CL |
689 | int index, |
690 | struct sk_buff_head *frames) | |
1edfb1af | 691 | { |
83eb935e MK |
692 | struct sk_buff_head *skb_list = &tid_agg_rx->reorder_buf[index]; |
693 | struct sk_buff *skb; | |
4cfda47b | 694 | struct ieee80211_rx_status *status; |
1edfb1af | 695 | |
dd318575 JB |
696 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
697 | ||
83eb935e | 698 | if (skb_queue_empty(skb_list)) |
1edfb1af JB |
699 | goto no_frame; |
700 | ||
83eb935e MK |
701 | if (!ieee80211_rx_reorder_ready(skb_list)) { |
702 | __skb_queue_purge(skb_list); | |
703 | goto no_frame; | |
704 | } | |
705 | ||
706 | /* release frames from the reorder ring buffer */ | |
1edfb1af | 707 | tid_agg_rx->stored_mpdu_num--; |
83eb935e MK |
708 | while ((skb = __skb_dequeue(skb_list))) { |
709 | status = IEEE80211_SKB_RXCB(skb); | |
710 | status->rx_flags |= IEEE80211_RX_DEFERRED_RELEASE; | |
711 | __skb_queue_tail(frames, skb); | |
712 | } | |
1edfb1af JB |
713 | |
714 | no_frame: | |
9a886586 | 715 | tid_agg_rx->head_seq_num = ieee80211_sn_inc(tid_agg_rx->head_seq_num); |
1edfb1af JB |
716 | } |
717 | ||
d3b2fb53 | 718 | static void ieee80211_release_reorder_frames(struct ieee80211_sub_if_data *sdata, |
1edfb1af | 719 | struct tid_ampdu_rx *tid_agg_rx, |
f9e124fb CL |
720 | u16 head_seq_num, |
721 | struct sk_buff_head *frames) | |
1edfb1af JB |
722 | { |
723 | int index; | |
724 | ||
dd318575 JB |
725 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
726 | ||
9a886586 | 727 | while (ieee80211_sn_less(tid_agg_rx->head_seq_num, head_seq_num)) { |
2e3049b7 | 728 | index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
f9e124fb CL |
729 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, index, |
730 | frames); | |
1edfb1af JB |
731 | } |
732 | } | |
733 | ||
734 | /* | |
735 | * Timeout (in jiffies) for skb's that are waiting in the RX reorder buffer. If | |
736 | * the skb was added to the buffer longer than this time ago, the earlier | |
737 | * frames that have not yet been received are assumed to be lost and the skb | |
738 | * can be released for processing. This may also release other skb's from the | |
739 | * reorder buffer if there are no additional gaps between the frames. | |
2bff8ebf CL |
740 | * |
741 | * Callers must hold tid_agg_rx->reorder_lock. | |
1edfb1af JB |
742 | */ |
743 | #define HT_RX_REORDER_BUF_TIMEOUT (HZ / 10) | |
744 | ||
d3b2fb53 | 745 | static void ieee80211_sta_reorder_release(struct ieee80211_sub_if_data *sdata, |
f9e124fb CL |
746 | struct tid_ampdu_rx *tid_agg_rx, |
747 | struct sk_buff_head *frames) | |
aa0c8636 | 748 | { |
83eb935e | 749 | int index, i, j; |
aa0c8636 | 750 | |
dd318575 JB |
751 | lockdep_assert_held(&tid_agg_rx->reorder_lock); |
752 | ||
aa0c8636 | 753 | /* release the buffer until next missing frame */ |
2e3049b7 | 754 | index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
83eb935e | 755 | if (!ieee80211_rx_reorder_ready(&tid_agg_rx->reorder_buf[index]) && |
07ae2dfc | 756 | tid_agg_rx->stored_mpdu_num) { |
aa0c8636 CL |
757 | /* |
758 | * No buffers ready to be released, but check whether any | |
759 | * frames in the reorder buffer have timed out. | |
760 | */ | |
aa0c8636 CL |
761 | int skipped = 1; |
762 | for (j = (index + 1) % tid_agg_rx->buf_size; j != index; | |
763 | j = (j + 1) % tid_agg_rx->buf_size) { | |
83eb935e MK |
764 | if (!ieee80211_rx_reorder_ready( |
765 | &tid_agg_rx->reorder_buf[j])) { | |
aa0c8636 CL |
766 | skipped++; |
767 | continue; | |
768 | } | |
499fe9a4 DH |
769 | if (skipped && |
770 | !time_after(jiffies, tid_agg_rx->reorder_time[j] + | |
aa0c8636 | 771 | HT_RX_REORDER_BUF_TIMEOUT)) |
2bff8ebf | 772 | goto set_release_timer; |
aa0c8636 | 773 | |
83eb935e MK |
774 | /* don't leave incomplete A-MSDUs around */ |
775 | for (i = (index + 1) % tid_agg_rx->buf_size; i != j; | |
776 | i = (i + 1) % tid_agg_rx->buf_size) | |
777 | __skb_queue_purge(&tid_agg_rx->reorder_buf[i]); | |
778 | ||
bdcbd8e0 JB |
779 | ht_dbg_ratelimited(sdata, |
780 | "release an RX reorder frame due to timeout on earlier frames\n"); | |
f9e124fb CL |
781 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, j, |
782 | frames); | |
aa0c8636 CL |
783 | |
784 | /* | |
785 | * Increment the head seq# also for the skipped slots. | |
786 | */ | |
787 | tid_agg_rx->head_seq_num = | |
9a886586 JB |
788 | (tid_agg_rx->head_seq_num + |
789 | skipped) & IEEE80211_SN_MASK; | |
aa0c8636 CL |
790 | skipped = 0; |
791 | } | |
83eb935e MK |
792 | } else while (ieee80211_rx_reorder_ready( |
793 | &tid_agg_rx->reorder_buf[index])) { | |
f9e124fb CL |
794 | ieee80211_release_reorder_frame(sdata, tid_agg_rx, index, |
795 | frames); | |
2e3049b7 | 796 | index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
aa0c8636 | 797 | } |
2bff8ebf CL |
798 | |
799 | if (tid_agg_rx->stored_mpdu_num) { | |
2e3049b7 | 800 | j = index = tid_agg_rx->head_seq_num % tid_agg_rx->buf_size; |
2bff8ebf CL |
801 | |
802 | for (; j != (index - 1) % tid_agg_rx->buf_size; | |
803 | j = (j + 1) % tid_agg_rx->buf_size) { | |
83eb935e MK |
804 | if (ieee80211_rx_reorder_ready( |
805 | &tid_agg_rx->reorder_buf[j])) | |
2bff8ebf CL |
806 | break; |
807 | } | |
808 | ||
809 | set_release_timer: | |
810 | ||
811 | mod_timer(&tid_agg_rx->reorder_timer, | |
334df731 | 812 | tid_agg_rx->reorder_time[j] + 1 + |
2bff8ebf CL |
813 | HT_RX_REORDER_BUF_TIMEOUT); |
814 | } else { | |
815 | del_timer(&tid_agg_rx->reorder_timer); | |
816 | } | |
aa0c8636 CL |
817 | } |
818 | ||
1edfb1af JB |
819 | /* |
820 | * As this function belongs to the RX path it must be under | |
821 | * rcu_read_lock protection. It returns false if the frame | |
822 | * can be processed immediately, true if it was consumed. | |
823 | */ | |
d3b2fb53 | 824 | static bool ieee80211_sta_manage_reorder_buf(struct ieee80211_sub_if_data *sdata, |
1edfb1af | 825 | struct tid_ampdu_rx *tid_agg_rx, |
f9e124fb CL |
826 | struct sk_buff *skb, |
827 | struct sk_buff_head *frames) | |
1edfb1af JB |
828 | { |
829 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
83eb935e | 830 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
1edfb1af JB |
831 | u16 sc = le16_to_cpu(hdr->seq_ctrl); |
832 | u16 mpdu_seq_num = (sc & IEEE80211_SCTL_SEQ) >> 4; | |
833 | u16 head_seq_num, buf_size; | |
834 | int index; | |
2bff8ebf | 835 | bool ret = true; |
1edfb1af | 836 | |
dd318575 JB |
837 | spin_lock(&tid_agg_rx->reorder_lock); |
838 | ||
4549cf2b MK |
839 | /* |
840 | * Offloaded BA sessions have no known starting sequence number so pick | |
841 | * one from first Rxed frame for this tid after BA was started. | |
842 | */ | |
843 | if (unlikely(tid_agg_rx->auto_seq)) { | |
844 | tid_agg_rx->auto_seq = false; | |
845 | tid_agg_rx->ssn = mpdu_seq_num; | |
846 | tid_agg_rx->head_seq_num = mpdu_seq_num; | |
847 | } | |
848 | ||
1edfb1af JB |
849 | buf_size = tid_agg_rx->buf_size; |
850 | head_seq_num = tid_agg_rx->head_seq_num; | |
851 | ||
852 | /* frame with out of date sequence number */ | |
9a886586 | 853 | if (ieee80211_sn_less(mpdu_seq_num, head_seq_num)) { |
1edfb1af | 854 | dev_kfree_skb(skb); |
2bff8ebf | 855 | goto out; |
1edfb1af JB |
856 | } |
857 | ||
858 | /* | |
859 | * If frame the sequence number exceeds our buffering window | |
860 | * size release some previous frames to make room for this one. | |
861 | */ | |
9a886586 JB |
862 | if (!ieee80211_sn_less(mpdu_seq_num, head_seq_num + buf_size)) { |
863 | head_seq_num = ieee80211_sn_inc( | |
864 | ieee80211_sn_sub(mpdu_seq_num, buf_size)); | |
1edfb1af | 865 | /* release stored frames up to new head to stack */ |
d3b2fb53 | 866 | ieee80211_release_reorder_frames(sdata, tid_agg_rx, |
f9e124fb | 867 | head_seq_num, frames); |
1edfb1af JB |
868 | } |
869 | ||
870 | /* Now the new frame is always in the range of the reordering buffer */ | |
871 | ||
2e3049b7 | 872 | index = mpdu_seq_num % tid_agg_rx->buf_size; |
1edfb1af JB |
873 | |
874 | /* check if we already stored this frame */ | |
83eb935e | 875 | if (ieee80211_rx_reorder_ready(&tid_agg_rx->reorder_buf[index])) { |
1edfb1af | 876 | dev_kfree_skb(skb); |
2bff8ebf | 877 | goto out; |
1edfb1af JB |
878 | } |
879 | ||
880 | /* | |
881 | * If the current MPDU is in the right order and nothing else | |
882 | * is stored we can process it directly, no need to buffer it. | |
c835b214 JB |
883 | * If it is first but there's something stored, we may be able |
884 | * to release frames after this one. | |
1edfb1af JB |
885 | */ |
886 | if (mpdu_seq_num == tid_agg_rx->head_seq_num && | |
887 | tid_agg_rx->stored_mpdu_num == 0) { | |
83eb935e MK |
888 | if (!(status->flag & RX_FLAG_AMSDU_MORE)) |
889 | tid_agg_rx->head_seq_num = | |
890 | ieee80211_sn_inc(tid_agg_rx->head_seq_num); | |
2bff8ebf CL |
891 | ret = false; |
892 | goto out; | |
1edfb1af JB |
893 | } |
894 | ||
895 | /* put the frame in the reordering buffer */ | |
83eb935e MK |
896 | __skb_queue_tail(&tid_agg_rx->reorder_buf[index], skb); |
897 | if (!(status->flag & RX_FLAG_AMSDU_MORE)) { | |
898 | tid_agg_rx->reorder_time[index] = jiffies; | |
899 | tid_agg_rx->stored_mpdu_num++; | |
900 | ieee80211_sta_reorder_release(sdata, tid_agg_rx, frames); | |
901 | } | |
1edfb1af | 902 | |
2bff8ebf CL |
903 | out: |
904 | spin_unlock(&tid_agg_rx->reorder_lock); | |
905 | return ret; | |
1edfb1af JB |
906 | } |
907 | ||
908 | /* | |
909 | * Reorder MPDUs from A-MPDUs, keeping them on a buffer. Returns | |
910 | * true if the MPDU was buffered, false if it should be processed. | |
911 | */ | |
f9e124fb CL |
912 | static void ieee80211_rx_reorder_ampdu(struct ieee80211_rx_data *rx, |
913 | struct sk_buff_head *frames) | |
1edfb1af | 914 | { |
2569a826 JB |
915 | struct sk_buff *skb = rx->skb; |
916 | struct ieee80211_local *local = rx->local; | |
1edfb1af | 917 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
660c6a44 | 918 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
2569a826 | 919 | struct sta_info *sta = rx->sta; |
1edfb1af JB |
920 | struct tid_ampdu_rx *tid_agg_rx; |
921 | u16 sc; | |
6cc00d54 | 922 | u8 tid, ack_policy; |
1edfb1af | 923 | |
051a41fa JB |
924 | if (!ieee80211_is_data_qos(hdr->frame_control) || |
925 | is_multicast_ether_addr(hdr->addr1)) | |
2569a826 | 926 | goto dont_reorder; |
1edfb1af JB |
927 | |
928 | /* | |
929 | * filter the QoS data rx stream according to | |
930 | * STA/TID and check if this STA/TID is on aggregation | |
931 | */ | |
932 | ||
1edfb1af | 933 | if (!sta) |
2569a826 | 934 | goto dont_reorder; |
1edfb1af | 935 | |
6cc00d54 TP |
936 | ack_policy = *ieee80211_get_qos_ctl(hdr) & |
937 | IEEE80211_QOS_CTL_ACK_POLICY_MASK; | |
1edfb1af JB |
938 | tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; |
939 | ||
a87f736d JB |
940 | tid_agg_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]); |
941 | if (!tid_agg_rx) | |
942 | goto dont_reorder; | |
1edfb1af JB |
943 | |
944 | /* qos null data frames are excluded */ | |
945 | if (unlikely(hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_NULLFUNC))) | |
a87f736d | 946 | goto dont_reorder; |
1edfb1af | 947 | |
6cc00d54 TP |
948 | /* not part of a BA session */ |
949 | if (ack_policy != IEEE80211_QOS_CTL_ACK_POLICY_BLOCKACK && | |
950 | ack_policy != IEEE80211_QOS_CTL_ACK_POLICY_NORMAL) | |
951 | goto dont_reorder; | |
952 | ||
660c6a44 TP |
953 | /* not actually part of this BA session */ |
954 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) | |
955 | goto dont_reorder; | |
956 | ||
1edfb1af JB |
957 | /* new, potentially un-ordered, ampdu frame - process it */ |
958 | ||
959 | /* reset session timer */ | |
960 | if (tid_agg_rx->timeout) | |
12d3952f | 961 | tid_agg_rx->last_rx = jiffies; |
1edfb1af JB |
962 | |
963 | /* if this mpdu is fragmented - terminate rx aggregation session */ | |
964 | sc = le16_to_cpu(hdr->seq_ctrl); | |
965 | if (sc & IEEE80211_SCTL_FRAG) { | |
c1475ca9 | 966 | skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; |
344eec67 JB |
967 | skb_queue_tail(&rx->sdata->skb_queue, skb); |
968 | ieee80211_queue_work(&local->hw, &rx->sdata->work); | |
2569a826 | 969 | return; |
1edfb1af JB |
970 | } |
971 | ||
a87f736d JB |
972 | /* |
973 | * No locking needed -- we will only ever process one | |
974 | * RX packet at a time, and thus own tid_agg_rx. All | |
975 | * other code manipulating it needs to (and does) make | |
976 | * sure that we cannot get to it any more before doing | |
977 | * anything with it. | |
978 | */ | |
f9e124fb CL |
979 | if (ieee80211_sta_manage_reorder_buf(rx->sdata, tid_agg_rx, skb, |
980 | frames)) | |
2569a826 JB |
981 | return; |
982 | ||
983 | dont_reorder: | |
f9e124fb | 984 | __skb_queue_tail(frames, skb); |
1edfb1af | 985 | } |
33b64eb2 | 986 | |
49461622 | 987 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 988 | ieee80211_rx_h_check(struct ieee80211_rx_data *rx) |
571ecf67 | 989 | { |
a7767f95 | 990 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
554891e6 | 991 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
571ecf67 | 992 | |
6b0f3274 JB |
993 | /* |
994 | * Drop duplicate 802.11 retransmissions | |
995 | * (IEEE 802.11-2012: 9.3.2.10 "Duplicate detection and recovery") | |
996 | */ | |
997 | if (rx->skb->len >= 24 && rx->sta && | |
998 | !ieee80211_is_ctl(hdr->frame_control) && | |
999 | !ieee80211_is_qos_nullfunc(hdr->frame_control) && | |
1000 | !is_multicast_ether_addr(hdr->addr1)) { | |
a7767f95 | 1001 | if (unlikely(ieee80211_has_retry(hdr->frame_control) && |
9e26297a | 1002 | rx->sta->last_seq_ctrl[rx->seqno_idx] == |
571ecf67 | 1003 | hdr->seq_ctrl)) { |
554891e6 | 1004 | if (status->rx_flags & IEEE80211_RX_RA_MATCH) { |
571ecf67 JB |
1005 | rx->local->dot11FrameDuplicateCount++; |
1006 | rx->sta->num_duplicates++; | |
1007 | } | |
b1f93314 | 1008 | return RX_DROP_UNUSABLE; |
0cfcefef | 1009 | } else if (!(status->flag & RX_FLAG_AMSDU_MORE)) { |
9e26297a | 1010 | rx->sta->last_seq_ctrl[rx->seqno_idx] = hdr->seq_ctrl; |
0cfcefef | 1011 | } |
571ecf67 JB |
1012 | } |
1013 | ||
571ecf67 JB |
1014 | if (unlikely(rx->skb->len < 16)) { |
1015 | I802_DEBUG_INC(rx->local->rx_handlers_drop_short); | |
e4c26add | 1016 | return RX_DROP_MONITOR; |
571ecf67 JB |
1017 | } |
1018 | ||
571ecf67 JB |
1019 | /* Drop disallowed frame classes based on STA auth/assoc state; |
1020 | * IEEE 802.11, Chap 5.5. | |
1021 | * | |
ccd7b362 JB |
1022 | * mac80211 filters only based on association state, i.e. it drops |
1023 | * Class 3 frames from not associated stations. hostapd sends | |
571ecf67 JB |
1024 | * deauth/disassoc frames when needed. In addition, hostapd is |
1025 | * responsible for filtering on both auth and assoc states. | |
1026 | */ | |
33b64eb2 | 1027 | |
902acc78 | 1028 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) |
33b64eb2 | 1029 | return ieee80211_rx_mesh_check(rx); |
33b64eb2 | 1030 | |
a7767f95 HH |
1031 | if (unlikely((ieee80211_is_data(hdr->frame_control) || |
1032 | ieee80211_is_pspoll(hdr->frame_control)) && | |
05c914fe | 1033 | rx->sdata->vif.type != NL80211_IFTYPE_ADHOC && |
1be7fe8d | 1034 | rx->sdata->vif.type != NL80211_IFTYPE_WDS && |
239281f8 | 1035 | rx->sdata->vif.type != NL80211_IFTYPE_OCB && |
c2c98fde | 1036 | (!rx->sta || !test_sta_flag(rx->sta, WLAN_STA_ASSOC)))) { |
7852e361 JB |
1037 | /* |
1038 | * accept port control frames from the AP even when it's not | |
1039 | * yet marked ASSOC to prevent a race where we don't set the | |
1040 | * assoc bit quickly enough before it sends the first frame | |
1041 | */ | |
1042 | if (rx->sta && rx->sdata->vif.type == NL80211_IFTYPE_STATION && | |
2a33bee2 | 1043 | ieee80211_is_data_present(hdr->frame_control)) { |
6dbda2d0 JB |
1044 | unsigned int hdrlen; |
1045 | __be16 ethertype; | |
1046 | ||
1047 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
1048 | ||
1049 | if (rx->skb->len < hdrlen + 8) | |
1050 | return RX_DROP_MONITOR; | |
1051 | ||
1052 | skb_copy_bits(rx->skb, hdrlen + 6, ðertype, 2); | |
1053 | if (ethertype == rx->sdata->control_port_protocol) | |
2a33bee2 GE |
1054 | return RX_CONTINUE; |
1055 | } | |
21fc7560 JB |
1056 | |
1057 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP && | |
1058 | cfg80211_rx_spurious_frame(rx->sdata->dev, | |
1059 | hdr->addr2, | |
1060 | GFP_ATOMIC)) | |
1061 | return RX_DROP_UNUSABLE; | |
1062 | ||
e4c26add | 1063 | return RX_DROP_MONITOR; |
2a33bee2 | 1064 | } |
571ecf67 | 1065 | |
9ae54c84 | 1066 | return RX_CONTINUE; |
570bd537 JB |
1067 | } |
1068 | ||
1069 | ||
572e0012 KV |
1070 | static ieee80211_rx_result debug_noinline |
1071 | ieee80211_rx_h_check_more_data(struct ieee80211_rx_data *rx) | |
1072 | { | |
1073 | struct ieee80211_local *local; | |
1074 | struct ieee80211_hdr *hdr; | |
1075 | struct sk_buff *skb; | |
1076 | ||
1077 | local = rx->local; | |
1078 | skb = rx->skb; | |
1079 | hdr = (struct ieee80211_hdr *) skb->data; | |
1080 | ||
1081 | if (!local->pspolling) | |
1082 | return RX_CONTINUE; | |
1083 | ||
1084 | if (!ieee80211_has_fromds(hdr->frame_control)) | |
1085 | /* this is not from AP */ | |
1086 | return RX_CONTINUE; | |
1087 | ||
1088 | if (!ieee80211_is_data(hdr->frame_control)) | |
1089 | return RX_CONTINUE; | |
1090 | ||
1091 | if (!ieee80211_has_moredata(hdr->frame_control)) { | |
1092 | /* AP has no more frames buffered for us */ | |
1093 | local->pspolling = false; | |
1094 | return RX_CONTINUE; | |
1095 | } | |
1096 | ||
1097 | /* more data bit is set, let's request a new frame from the AP */ | |
1098 | ieee80211_send_pspoll(local, rx->sdata); | |
1099 | ||
1100 | return RX_CONTINUE; | |
1101 | } | |
1102 | ||
d012a605 | 1103 | static void sta_ps_start(struct sta_info *sta) |
571ecf67 | 1104 | { |
133b8226 | 1105 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
4571d3bf | 1106 | struct ieee80211_local *local = sdata->local; |
d012a605 | 1107 | struct ps_data *ps; |
0795af57 | 1108 | |
d012a605 MP |
1109 | if (sta->sdata->vif.type == NL80211_IFTYPE_AP || |
1110 | sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
1111 | ps = &sdata->bss->ps; | |
1112 | else | |
1113 | return; | |
1114 | ||
1115 | atomic_inc(&ps->num_sta_ps); | |
c2c98fde | 1116 | set_sta_flag(sta, WLAN_STA_PS_STA); |
d057e5a3 AN |
1117 | if (!(local->hw.flags & IEEE80211_HW_AP_LINK_PS)) |
1118 | drv_sta_notify(local, sdata, STA_NOTIFY_SLEEP, &sta->sta); | |
bdcbd8e0 JB |
1119 | ps_dbg(sdata, "STA %pM aid %d enters power save mode\n", |
1120 | sta->sta.addr, sta->sta.aid); | |
571ecf67 JB |
1121 | } |
1122 | ||
d012a605 | 1123 | static void sta_ps_end(struct sta_info *sta) |
571ecf67 | 1124 | { |
bdcbd8e0 JB |
1125 | ps_dbg(sta->sdata, "STA %pM aid %d exits power save mode\n", |
1126 | sta->sta.addr, sta->sta.aid); | |
004c872e | 1127 | |
c2c98fde | 1128 | if (test_sta_flag(sta, WLAN_STA_PS_DRIVER)) { |
e3685e03 JB |
1129 | /* |
1130 | * Clear the flag only if the other one is still set | |
1131 | * so that the TX path won't start TX'ing new frames | |
1132 | * directly ... In the case that the driver flag isn't | |
1133 | * set ieee80211_sta_ps_deliver_wakeup() will clear it. | |
1134 | */ | |
1135 | clear_sta_flag(sta, WLAN_STA_PS_STA); | |
bdcbd8e0 JB |
1136 | ps_dbg(sta->sdata, "STA %pM aid %d driver-ps-blocked\n", |
1137 | sta->sta.addr, sta->sta.aid); | |
af818581 JB |
1138 | return; |
1139 | } | |
1140 | ||
5ac2e350 JB |
1141 | set_sta_flag(sta, WLAN_STA_PS_DELIVER); |
1142 | clear_sta_flag(sta, WLAN_STA_PS_STA); | |
af818581 | 1143 | ieee80211_sta_ps_deliver_wakeup(sta); |
571ecf67 JB |
1144 | } |
1145 | ||
d057e5a3 AN |
1146 | int ieee80211_sta_ps_transition(struct ieee80211_sta *sta, bool start) |
1147 | { | |
1148 | struct sta_info *sta_inf = container_of(sta, struct sta_info, sta); | |
1149 | bool in_ps; | |
1150 | ||
1151 | WARN_ON(!(sta_inf->local->hw.flags & IEEE80211_HW_AP_LINK_PS)); | |
1152 | ||
1153 | /* Don't let the same PS state be set twice */ | |
c2c98fde | 1154 | in_ps = test_sta_flag(sta_inf, WLAN_STA_PS_STA); |
d057e5a3 AN |
1155 | if ((start && in_ps) || (!start && !in_ps)) |
1156 | return -EINVAL; | |
1157 | ||
1158 | if (start) | |
d012a605 | 1159 | sta_ps_start(sta_inf); |
d057e5a3 | 1160 | else |
d012a605 | 1161 | sta_ps_end(sta_inf); |
d057e5a3 AN |
1162 | |
1163 | return 0; | |
1164 | } | |
1165 | EXPORT_SYMBOL(ieee80211_sta_ps_transition); | |
1166 | ||
47086fc5 JB |
1167 | static ieee80211_rx_result debug_noinline |
1168 | ieee80211_rx_h_uapsd_and_pspoll(struct ieee80211_rx_data *rx) | |
1169 | { | |
1170 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
1171 | struct ieee80211_hdr *hdr = (void *)rx->skb->data; | |
1172 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); | |
1173 | int tid, ac; | |
1174 | ||
1175 | if (!rx->sta || !(status->rx_flags & IEEE80211_RX_RA_MATCH)) | |
1176 | return RX_CONTINUE; | |
1177 | ||
1178 | if (sdata->vif.type != NL80211_IFTYPE_AP && | |
1179 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN) | |
1180 | return RX_CONTINUE; | |
1181 | ||
1182 | /* | |
1183 | * The device handles station powersave, so don't do anything about | |
1184 | * uAPSD and PS-Poll frames (the latter shouldn't even come up from | |
1185 | * it to mac80211 since they're handled.) | |
1186 | */ | |
1187 | if (sdata->local->hw.flags & IEEE80211_HW_AP_LINK_PS) | |
1188 | return RX_CONTINUE; | |
1189 | ||
1190 | /* | |
1191 | * Don't do anything if the station isn't already asleep. In | |
1192 | * the uAPSD case, the station will probably be marked asleep, | |
1193 | * in the PS-Poll case the station must be confused ... | |
1194 | */ | |
c2c98fde | 1195 | if (!test_sta_flag(rx->sta, WLAN_STA_PS_STA)) |
47086fc5 JB |
1196 | return RX_CONTINUE; |
1197 | ||
1198 | if (unlikely(ieee80211_is_pspoll(hdr->frame_control))) { | |
c2c98fde JB |
1199 | if (!test_sta_flag(rx->sta, WLAN_STA_SP)) { |
1200 | if (!test_sta_flag(rx->sta, WLAN_STA_PS_DRIVER)) | |
deeaee19 JB |
1201 | ieee80211_sta_ps_deliver_poll_response(rx->sta); |
1202 | else | |
c2c98fde | 1203 | set_sta_flag(rx->sta, WLAN_STA_PSPOLL); |
deeaee19 | 1204 | } |
47086fc5 JB |
1205 | |
1206 | /* Free PS Poll skb here instead of returning RX_DROP that would | |
1207 | * count as an dropped frame. */ | |
1208 | dev_kfree_skb(rx->skb); | |
1209 | ||
1210 | return RX_QUEUED; | |
1211 | } else if (!ieee80211_has_morefrags(hdr->frame_control) && | |
1212 | !(status->rx_flags & IEEE80211_RX_DEFERRED_RELEASE) && | |
1213 | ieee80211_has_pm(hdr->frame_control) && | |
1214 | (ieee80211_is_data_qos(hdr->frame_control) || | |
1215 | ieee80211_is_qos_nullfunc(hdr->frame_control))) { | |
1216 | tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; | |
1217 | ac = ieee802_1d_to_ac[tid & 7]; | |
1218 | ||
1219 | /* | |
1220 | * If this AC is not trigger-enabled do nothing. | |
1221 | * | |
1222 | * NB: This could/should check a separate bitmap of trigger- | |
1223 | * enabled queues, but for now we only implement uAPSD w/o | |
1224 | * TSPEC changes to the ACs, so they're always the same. | |
1225 | */ | |
1226 | if (!(rx->sta->sta.uapsd_queues & BIT(ac))) | |
1227 | return RX_CONTINUE; | |
1228 | ||
1229 | /* if we are in a service period, do nothing */ | |
c2c98fde | 1230 | if (test_sta_flag(rx->sta, WLAN_STA_SP)) |
47086fc5 JB |
1231 | return RX_CONTINUE; |
1232 | ||
c2c98fde | 1233 | if (!test_sta_flag(rx->sta, WLAN_STA_PS_DRIVER)) |
47086fc5 JB |
1234 | ieee80211_sta_ps_deliver_uapsd(rx->sta); |
1235 | else | |
c2c98fde | 1236 | set_sta_flag(rx->sta, WLAN_STA_UAPSD); |
47086fc5 JB |
1237 | } |
1238 | ||
1239 | return RX_CONTINUE; | |
1240 | } | |
1241 | ||
49461622 | 1242 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 1243 | ieee80211_rx_h_sta_process(struct ieee80211_rx_data *rx) |
571ecf67 JB |
1244 | { |
1245 | struct sta_info *sta = rx->sta; | |
eb9fb5b8 JB |
1246 | struct sk_buff *skb = rx->skb; |
1247 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
1248 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
ef0621e8 | 1249 | int i; |
571ecf67 JB |
1250 | |
1251 | if (!sta) | |
9ae54c84 | 1252 | return RX_CONTINUE; |
571ecf67 | 1253 | |
b291ba11 JB |
1254 | /* |
1255 | * Update last_rx only for IBSS packets which are for the current | |
e584da5e AQ |
1256 | * BSSID and for station already AUTHORIZED to avoid keeping the |
1257 | * current IBSS network alive in cases where other STAs start | |
1258 | * using different BSSID. This will also give the station another | |
1259 | * chance to restart the authentication/authorization in case | |
1260 | * something went wrong the first time. | |
b291ba11 | 1261 | */ |
05c914fe | 1262 | if (rx->sdata->vif.type == NL80211_IFTYPE_ADHOC) { |
71364716 | 1263 | u8 *bssid = ieee80211_get_bssid(hdr, rx->skb->len, |
05c914fe | 1264 | NL80211_IFTYPE_ADHOC); |
e584da5e AQ |
1265 | if (ether_addr_equal(bssid, rx->sdata->u.ibss.bssid) && |
1266 | test_sta_flag(sta, WLAN_STA_AUTHORIZED)) { | |
571ecf67 | 1267 | sta->last_rx = jiffies; |
f4ebddf9 HR |
1268 | if (ieee80211_is_data(hdr->frame_control) && |
1269 | !is_multicast_ether_addr(hdr->addr1)) { | |
3af6334c FF |
1270 | sta->last_rx_rate_idx = status->rate_idx; |
1271 | sta->last_rx_rate_flag = status->flag; | |
1b8d242a | 1272 | sta->last_rx_rate_vht_flag = status->vht_flag; |
5614618e | 1273 | sta->last_rx_rate_vht_nss = status->vht_nss; |
3af6334c FF |
1274 | } |
1275 | } | |
239281f8 RL |
1276 | } else if (rx->sdata->vif.type == NL80211_IFTYPE_OCB) { |
1277 | u8 *bssid = ieee80211_get_bssid(hdr, rx->skb->len, | |
1278 | NL80211_IFTYPE_OCB); | |
1279 | /* OCB uses wild-card BSSID */ | |
1280 | if (is_broadcast_ether_addr(bssid)) | |
1281 | sta->last_rx = jiffies; | |
b291ba11 JB |
1282 | } else if (!is_multicast_ether_addr(hdr->addr1)) { |
1283 | /* | |
33b64eb2 LCC |
1284 | * Mesh beacons will update last_rx when if they are found to |
1285 | * match the current local configuration when processed. | |
571ecf67 | 1286 | */ |
b291ba11 | 1287 | sta->last_rx = jiffies; |
3af6334c FF |
1288 | if (ieee80211_is_data(hdr->frame_control)) { |
1289 | sta->last_rx_rate_idx = status->rate_idx; | |
1290 | sta->last_rx_rate_flag = status->flag; | |
b8ff416b | 1291 | sta->last_rx_rate_vht_flag = status->vht_flag; |
5614618e | 1292 | sta->last_rx_rate_vht_nss = status->vht_nss; |
3af6334c | 1293 | } |
571ecf67 JB |
1294 | } |
1295 | ||
554891e6 | 1296 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
9ae54c84 | 1297 | return RX_CONTINUE; |
571ecf67 | 1298 | |
3cf335d5 KV |
1299 | if (rx->sdata->vif.type == NL80211_IFTYPE_STATION) |
1300 | ieee80211_sta_rx_notify(rx->sdata, hdr); | |
1301 | ||
571ecf67 JB |
1302 | sta->rx_fragments++; |
1303 | sta->rx_bytes += rx->skb->len; | |
fe8431f8 FF |
1304 | if (!(status->flag & RX_FLAG_NO_SIGNAL_VAL)) { |
1305 | sta->last_signal = status->signal; | |
1306 | ewma_add(&sta->avg_signal, -status->signal); | |
1307 | } | |
571ecf67 | 1308 | |
ef0621e8 FF |
1309 | if (status->chains) { |
1310 | sta->chains = status->chains; | |
1311 | for (i = 0; i < ARRAY_SIZE(status->chain_signal); i++) { | |
1312 | int signal = status->chain_signal[i]; | |
1313 | ||
1314 | if (!(status->chains & BIT(i))) | |
1315 | continue; | |
1316 | ||
1317 | sta->chain_signal_last[i] = signal; | |
1318 | ewma_add(&sta->chain_signal_avg[i], -signal); | |
1319 | } | |
1320 | } | |
1321 | ||
72eaa43a JB |
1322 | /* |
1323 | * Change STA power saving mode only at the end of a frame | |
1324 | * exchange sequence. | |
1325 | */ | |
d057e5a3 AN |
1326 | if (!(sta->local->hw.flags & IEEE80211_HW_AP_LINK_PS) && |
1327 | !ieee80211_has_morefrags(hdr->frame_control) && | |
4cfda47b | 1328 | !(status->rx_flags & IEEE80211_RX_DEFERRED_RELEASE) && |
05c914fe | 1329 | (rx->sdata->vif.type == NL80211_IFTYPE_AP || |
b4ba544c JB |
1330 | rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) && |
1331 | /* PM bit is only checked in frames where it isn't reserved, | |
1332 | * in AP mode it's reserved in non-bufferable management frames | |
1333 | * (cf. IEEE 802.11-2012 8.2.4.1.7 Power Management field) | |
1334 | */ | |
1335 | (!ieee80211_is_mgmt(hdr->frame_control) || | |
1336 | ieee80211_is_bufferable_mmpdu(hdr->frame_control))) { | |
c2c98fde | 1337 | if (test_sta_flag(sta, WLAN_STA_PS_STA)) { |
b4ba544c | 1338 | if (!ieee80211_has_pm(hdr->frame_control)) |
d012a605 | 1339 | sta_ps_end(sta); |
72eaa43a JB |
1340 | } else { |
1341 | if (ieee80211_has_pm(hdr->frame_control)) | |
d012a605 | 1342 | sta_ps_start(sta); |
72eaa43a | 1343 | } |
571ecf67 JB |
1344 | } |
1345 | ||
3f52b7e3 MP |
1346 | /* mesh power save support */ |
1347 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) | |
1348 | ieee80211_mps_rx_h_sta_process(sta, hdr); | |
1349 | ||
22403def JB |
1350 | /* |
1351 | * Drop (qos-)data::nullfunc frames silently, since they | |
1352 | * are used only to control station power saving mode. | |
1353 | */ | |
1354 | if (ieee80211_is_nullfunc(hdr->frame_control) || | |
1355 | ieee80211_is_qos_nullfunc(hdr->frame_control)) { | |
571ecf67 | 1356 | I802_DEBUG_INC(rx->local->rx_handlers_drop_nullfunc); |
d524215f FF |
1357 | |
1358 | /* | |
1359 | * If we receive a 4-addr nullfunc frame from a STA | |
e7f4a940 JB |
1360 | * that was not moved to a 4-addr STA vlan yet send |
1361 | * the event to userspace and for older hostapd drop | |
1362 | * the frame to the monitor interface. | |
d524215f FF |
1363 | */ |
1364 | if (ieee80211_has_a4(hdr->frame_control) && | |
1365 | (rx->sdata->vif.type == NL80211_IFTYPE_AP || | |
1366 | (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
e7f4a940 JB |
1367 | !rx->sdata->u.vlan.sta))) { |
1368 | if (!test_and_set_sta_flag(sta, WLAN_STA_4ADDR_EVENT)) | |
1369 | cfg80211_rx_unexpected_4addr_frame( | |
1370 | rx->sdata->dev, sta->sta.addr, | |
1371 | GFP_ATOMIC); | |
d524215f | 1372 | return RX_DROP_MONITOR; |
e7f4a940 | 1373 | } |
22403def JB |
1374 | /* |
1375 | * Update counter and free packet here to avoid | |
1376 | * counting this as a dropped packed. | |
1377 | */ | |
571ecf67 JB |
1378 | sta->rx_packets++; |
1379 | dev_kfree_skb(rx->skb); | |
9ae54c84 | 1380 | return RX_QUEUED; |
571ecf67 JB |
1381 | } |
1382 | ||
9ae54c84 | 1383 | return RX_CONTINUE; |
571ecf67 JB |
1384 | } /* ieee80211_rx_h_sta_process */ |
1385 | ||
86c228a7 JA |
1386 | static ieee80211_rx_result debug_noinline |
1387 | ieee80211_rx_h_decrypt(struct ieee80211_rx_data *rx) | |
1388 | { | |
1389 | struct sk_buff *skb = rx->skb; | |
1390 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
1391 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
1392 | int keyidx; | |
1393 | int hdrlen; | |
1394 | ieee80211_rx_result result = RX_DROP_UNUSABLE; | |
1395 | struct ieee80211_key *sta_ptk = NULL; | |
1396 | int mmie_keyidx = -1; | |
1397 | __le16 fc; | |
2475b1cc | 1398 | const struct ieee80211_cipher_scheme *cs = NULL; |
86c228a7 JA |
1399 | |
1400 | /* | |
1401 | * Key selection 101 | |
1402 | * | |
1403 | * There are four types of keys: | |
1404 | * - GTK (group keys) | |
1405 | * - IGTK (group keys for management frames) | |
1406 | * - PTK (pairwise keys) | |
1407 | * - STK (station-to-station pairwise keys) | |
1408 | * | |
1409 | * When selecting a key, we have to distinguish between multicast | |
1410 | * (including broadcast) and unicast frames, the latter can only | |
1411 | * use PTKs and STKs while the former always use GTKs and IGTKs. | |
1412 | * Unless, of course, actual WEP keys ("pre-RSNA") are used, then | |
1413 | * unicast frames can also use key indices like GTKs. Hence, if we | |
1414 | * don't have a PTK/STK we check the key index for a WEP key. | |
1415 | * | |
1416 | * Note that in a regular BSS, multicast frames are sent by the | |
1417 | * AP only, associated stations unicast the frame to the AP first | |
1418 | * which then multicasts it on their behalf. | |
1419 | * | |
1420 | * There is also a slight problem in IBSS mode: GTKs are negotiated | |
1421 | * with each station, that is something we don't currently handle. | |
1422 | * The spec seems to expect that one negotiates the same key with | |
1423 | * every station but there's no such requirement; VLANs could be | |
1424 | * possible. | |
1425 | */ | |
1426 | ||
1427 | /* | |
1428 | * No point in finding a key and decrypting if the frame is neither | |
1429 | * addressed to us nor a multicast frame. | |
1430 | */ | |
1431 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) | |
1432 | return RX_CONTINUE; | |
1433 | ||
1434 | /* start without a key */ | |
1435 | rx->key = NULL; | |
2475b1cc | 1436 | fc = hdr->frame_control; |
86c228a7 | 1437 | |
2475b1cc MS |
1438 | if (rx->sta) { |
1439 | int keyid = rx->sta->ptk_idx; | |
86c228a7 | 1440 | |
2475b1cc MS |
1441 | if (ieee80211_has_protected(fc) && rx->sta->cipher_scheme) { |
1442 | cs = rx->sta->cipher_scheme; | |
1443 | keyid = iwl80211_get_cs_keyid(cs, rx->skb); | |
1444 | if (unlikely(keyid < 0)) | |
1445 | return RX_DROP_UNUSABLE; | |
1446 | } | |
1447 | sta_ptk = rcu_dereference(rx->sta->ptk[keyid]); | |
1448 | } | |
86c228a7 JA |
1449 | |
1450 | if (!ieee80211_has_protected(fc)) | |
1451 | mmie_keyidx = ieee80211_get_mmie_keyidx(rx->skb); | |
1452 | ||
1453 | if (!is_multicast_ether_addr(hdr->addr1) && sta_ptk) { | |
1454 | rx->key = sta_ptk; | |
1455 | if ((status->flag & RX_FLAG_DECRYPTED) && | |
1456 | (status->flag & RX_FLAG_IV_STRIPPED)) | |
1457 | return RX_CONTINUE; | |
1458 | /* Skip decryption if the frame is not protected. */ | |
1459 | if (!ieee80211_has_protected(fc)) | |
1460 | return RX_CONTINUE; | |
1461 | } else if (mmie_keyidx >= 0) { | |
1462 | /* Broadcast/multicast robust management frame / BIP */ | |
1463 | if ((status->flag & RX_FLAG_DECRYPTED) && | |
1464 | (status->flag & RX_FLAG_IV_STRIPPED)) | |
1465 | return RX_CONTINUE; | |
1466 | ||
1467 | if (mmie_keyidx < NUM_DEFAULT_KEYS || | |
1468 | mmie_keyidx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS) | |
1469 | return RX_DROP_MONITOR; /* unexpected BIP keyidx */ | |
1470 | if (rx->sta) | |
1471 | rx->key = rcu_dereference(rx->sta->gtk[mmie_keyidx]); | |
1472 | if (!rx->key) | |
1473 | rx->key = rcu_dereference(rx->sdata->keys[mmie_keyidx]); | |
1474 | } else if (!ieee80211_has_protected(fc)) { | |
1475 | /* | |
1476 | * The frame was not protected, so skip decryption. However, we | |
1477 | * need to set rx->key if there is a key that could have been | |
1478 | * used so that the frame may be dropped if encryption would | |
1479 | * have been expected. | |
1480 | */ | |
1481 | struct ieee80211_key *key = NULL; | |
1482 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
1483 | int i; | |
1484 | ||
1485 | if (ieee80211_is_mgmt(fc) && | |
1486 | is_multicast_ether_addr(hdr->addr1) && | |
1487 | (key = rcu_dereference(rx->sdata->default_mgmt_key))) | |
1488 | rx->key = key; | |
1489 | else { | |
1490 | if (rx->sta) { | |
1491 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) { | |
1492 | key = rcu_dereference(rx->sta->gtk[i]); | |
1493 | if (key) | |
1494 | break; | |
1495 | } | |
1496 | } | |
1497 | if (!key) { | |
1498 | for (i = 0; i < NUM_DEFAULT_KEYS; i++) { | |
1499 | key = rcu_dereference(sdata->keys[i]); | |
1500 | if (key) | |
1501 | break; | |
1502 | } | |
1503 | } | |
1504 | if (key) | |
1505 | rx->key = key; | |
1506 | } | |
1507 | return RX_CONTINUE; | |
1508 | } else { | |
1509 | u8 keyid; | |
2475b1cc | 1510 | |
86c228a7 JA |
1511 | /* |
1512 | * The device doesn't give us the IV so we won't be | |
1513 | * able to look up the key. That's ok though, we | |
1514 | * don't need to decrypt the frame, we just won't | |
1515 | * be able to keep statistics accurate. | |
1516 | * Except for key threshold notifications, should | |
1517 | * we somehow allow the driver to tell us which key | |
1518 | * the hardware used if this flag is set? | |
1519 | */ | |
1520 | if ((status->flag & RX_FLAG_DECRYPTED) && | |
1521 | (status->flag & RX_FLAG_IV_STRIPPED)) | |
1522 | return RX_CONTINUE; | |
1523 | ||
1524 | hdrlen = ieee80211_hdrlen(fc); | |
1525 | ||
2475b1cc MS |
1526 | if (cs) { |
1527 | keyidx = iwl80211_get_cs_keyid(cs, rx->skb); | |
86c228a7 | 1528 | |
2475b1cc MS |
1529 | if (unlikely(keyidx < 0)) |
1530 | return RX_DROP_UNUSABLE; | |
1531 | } else { | |
1532 | if (rx->skb->len < 8 + hdrlen) | |
1533 | return RX_DROP_UNUSABLE; /* TODO: count this? */ | |
1534 | /* | |
1535 | * no need to call ieee80211_wep_get_keyidx, | |
1536 | * it verifies a bunch of things we've done already | |
1537 | */ | |
1538 | skb_copy_bits(rx->skb, hdrlen + 3, &keyid, 1); | |
1539 | keyidx = keyid >> 6; | |
1540 | } | |
86c228a7 JA |
1541 | |
1542 | /* check per-station GTK first, if multicast packet */ | |
1543 | if (is_multicast_ether_addr(hdr->addr1) && rx->sta) | |
1544 | rx->key = rcu_dereference(rx->sta->gtk[keyidx]); | |
1545 | ||
1546 | /* if not found, try default key */ | |
1547 | if (!rx->key) { | |
1548 | rx->key = rcu_dereference(rx->sdata->keys[keyidx]); | |
1549 | ||
1550 | /* | |
1551 | * RSNA-protected unicast frames should always be | |
1552 | * sent with pairwise or station-to-station keys, | |
1553 | * but for WEP we allow using a key index as well. | |
1554 | */ | |
1555 | if (rx->key && | |
1556 | rx->key->conf.cipher != WLAN_CIPHER_SUITE_WEP40 && | |
1557 | rx->key->conf.cipher != WLAN_CIPHER_SUITE_WEP104 && | |
1558 | !is_multicast_ether_addr(hdr->addr1)) | |
1559 | rx->key = NULL; | |
1560 | } | |
1561 | } | |
1562 | ||
1563 | if (rx->key) { | |
1564 | if (unlikely(rx->key->flags & KEY_FLAG_TAINTED)) | |
1565 | return RX_DROP_MONITOR; | |
1566 | ||
1567 | rx->key->tx_rx_count++; | |
1568 | /* TODO: add threshold stuff again */ | |
1569 | } else { | |
1570 | return RX_DROP_MONITOR; | |
1571 | } | |
1572 | ||
1573 | switch (rx->key->conf.cipher) { | |
1574 | case WLAN_CIPHER_SUITE_WEP40: | |
1575 | case WLAN_CIPHER_SUITE_WEP104: | |
1576 | result = ieee80211_crypto_wep_decrypt(rx); | |
1577 | break; | |
1578 | case WLAN_CIPHER_SUITE_TKIP: | |
1579 | result = ieee80211_crypto_tkip_decrypt(rx); | |
1580 | break; | |
1581 | case WLAN_CIPHER_SUITE_CCMP: | |
1582 | result = ieee80211_crypto_ccmp_decrypt(rx); | |
1583 | break; | |
1584 | case WLAN_CIPHER_SUITE_AES_CMAC: | |
1585 | result = ieee80211_crypto_aes_cmac_decrypt(rx); | |
1586 | break; | |
1587 | default: | |
2475b1cc | 1588 | result = ieee80211_crypto_hw_decrypt(rx); |
86c228a7 JA |
1589 | } |
1590 | ||
1591 | /* the hdr variable is invalid after the decrypt handlers */ | |
1592 | ||
1593 | /* either the frame has been decrypted or will be dropped */ | |
1594 | status->flag |= RX_FLAG_DECRYPTED; | |
1595 | ||
1596 | return result; | |
1597 | } | |
1598 | ||
571ecf67 JB |
1599 | static inline struct ieee80211_fragment_entry * |
1600 | ieee80211_reassemble_add(struct ieee80211_sub_if_data *sdata, | |
1601 | unsigned int frag, unsigned int seq, int rx_queue, | |
1602 | struct sk_buff **skb) | |
1603 | { | |
1604 | struct ieee80211_fragment_entry *entry; | |
571ecf67 | 1605 | |
571ecf67 JB |
1606 | entry = &sdata->fragments[sdata->fragment_next++]; |
1607 | if (sdata->fragment_next >= IEEE80211_FRAGMENT_MAX) | |
1608 | sdata->fragment_next = 0; | |
1609 | ||
bdcbd8e0 | 1610 | if (!skb_queue_empty(&entry->skb_list)) |
571ecf67 | 1611 | __skb_queue_purge(&entry->skb_list); |
571ecf67 JB |
1612 | |
1613 | __skb_queue_tail(&entry->skb_list, *skb); /* no need for locking */ | |
1614 | *skb = NULL; | |
1615 | entry->first_frag_time = jiffies; | |
1616 | entry->seq = seq; | |
1617 | entry->rx_queue = rx_queue; | |
1618 | entry->last_frag = frag; | |
1619 | entry->ccmp = 0; | |
1620 | entry->extra_len = 0; | |
1621 | ||
1622 | return entry; | |
1623 | } | |
1624 | ||
1625 | static inline struct ieee80211_fragment_entry * | |
1626 | ieee80211_reassemble_find(struct ieee80211_sub_if_data *sdata, | |
b73d70ad | 1627 | unsigned int frag, unsigned int seq, |
571ecf67 JB |
1628 | int rx_queue, struct ieee80211_hdr *hdr) |
1629 | { | |
1630 | struct ieee80211_fragment_entry *entry; | |
1631 | int i, idx; | |
1632 | ||
1633 | idx = sdata->fragment_next; | |
1634 | for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++) { | |
1635 | struct ieee80211_hdr *f_hdr; | |
571ecf67 JB |
1636 | |
1637 | idx--; | |
1638 | if (idx < 0) | |
1639 | idx = IEEE80211_FRAGMENT_MAX - 1; | |
1640 | ||
1641 | entry = &sdata->fragments[idx]; | |
1642 | if (skb_queue_empty(&entry->skb_list) || entry->seq != seq || | |
1643 | entry->rx_queue != rx_queue || | |
1644 | entry->last_frag + 1 != frag) | |
1645 | continue; | |
1646 | ||
b73d70ad | 1647 | f_hdr = (struct ieee80211_hdr *)entry->skb_list.next->data; |
571ecf67 | 1648 | |
b73d70ad HH |
1649 | /* |
1650 | * Check ftype and addresses are equal, else check next fragment | |
1651 | */ | |
1652 | if (((hdr->frame_control ^ f_hdr->frame_control) & | |
1653 | cpu_to_le16(IEEE80211_FCTL_FTYPE)) || | |
b203ca39 JP |
1654 | !ether_addr_equal(hdr->addr1, f_hdr->addr1) || |
1655 | !ether_addr_equal(hdr->addr2, f_hdr->addr2)) | |
571ecf67 JB |
1656 | continue; |
1657 | ||
ab46623e | 1658 | if (time_after(jiffies, entry->first_frag_time + 2 * HZ)) { |
571ecf67 JB |
1659 | __skb_queue_purge(&entry->skb_list); |
1660 | continue; | |
1661 | } | |
1662 | return entry; | |
1663 | } | |
1664 | ||
1665 | return NULL; | |
1666 | } | |
1667 | ||
49461622 | 1668 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 1669 | ieee80211_rx_h_defragment(struct ieee80211_rx_data *rx) |
571ecf67 JB |
1670 | { |
1671 | struct ieee80211_hdr *hdr; | |
1672 | u16 sc; | |
358c8d9d | 1673 | __le16 fc; |
571ecf67 JB |
1674 | unsigned int frag, seq; |
1675 | struct ieee80211_fragment_entry *entry; | |
1676 | struct sk_buff *skb; | |
554891e6 | 1677 | struct ieee80211_rx_status *status; |
571ecf67 | 1678 | |
b73d70ad | 1679 | hdr = (struct ieee80211_hdr *)rx->skb->data; |
358c8d9d | 1680 | fc = hdr->frame_control; |
f7fbf70e JC |
1681 | |
1682 | if (ieee80211_is_ctl(fc)) | |
1683 | return RX_CONTINUE; | |
1684 | ||
571ecf67 JB |
1685 | sc = le16_to_cpu(hdr->seq_ctrl); |
1686 | frag = sc & IEEE80211_SCTL_FRAG; | |
1687 | ||
358c8d9d | 1688 | if (likely((!ieee80211_has_morefrags(fc) && frag == 0) || |
571ecf67 JB |
1689 | is_multicast_ether_addr(hdr->addr1))) { |
1690 | /* not fragmented */ | |
1691 | goto out; | |
1692 | } | |
1693 | I802_DEBUG_INC(rx->local->rx_handlers_fragments); | |
1694 | ||
e3cf8b3f ZY |
1695 | if (skb_linearize(rx->skb)) |
1696 | return RX_DROP_UNUSABLE; | |
1697 | ||
058897a4 AK |
1698 | /* |
1699 | * skb_linearize() might change the skb->data and | |
1700 | * previously cached variables (in this case, hdr) need to | |
1701 | * be refreshed with the new data. | |
1702 | */ | |
1703 | hdr = (struct ieee80211_hdr *)rx->skb->data; | |
571ecf67 JB |
1704 | seq = (sc & IEEE80211_SCTL_SEQ) >> 4; |
1705 | ||
1706 | if (frag == 0) { | |
1707 | /* This is the first fragment of a new frame. */ | |
1708 | entry = ieee80211_reassemble_add(rx->sdata, frag, seq, | |
9e26297a | 1709 | rx->seqno_idx, &(rx->skb)); |
97359d12 | 1710 | if (rx->key && rx->key->conf.cipher == WLAN_CIPHER_SUITE_CCMP && |
358c8d9d | 1711 | ieee80211_has_protected(fc)) { |
9e26297a | 1712 | int queue = rx->security_idx; |
571ecf67 JB |
1713 | /* Store CCMP PN so that we can verify that the next |
1714 | * fragment has a sequential PN value. */ | |
1715 | entry->ccmp = 1; | |
1716 | memcpy(entry->last_pn, | |
9190252c | 1717 | rx->key->u.ccmp.rx_pn[queue], |
4325f6ca | 1718 | IEEE80211_CCMP_PN_LEN); |
571ecf67 | 1719 | } |
9ae54c84 | 1720 | return RX_QUEUED; |
571ecf67 JB |
1721 | } |
1722 | ||
1723 | /* This is a fragment for a frame that should already be pending in | |
1724 | * fragment cache. Add this fragment to the end of the pending entry. | |
1725 | */ | |
9e26297a JB |
1726 | entry = ieee80211_reassemble_find(rx->sdata, frag, seq, |
1727 | rx->seqno_idx, hdr); | |
571ecf67 JB |
1728 | if (!entry) { |
1729 | I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag); | |
e4c26add | 1730 | return RX_DROP_MONITOR; |
571ecf67 JB |
1731 | } |
1732 | ||
1733 | /* Verify that MPDUs within one MSDU have sequential PN values. | |
1734 | * (IEEE 802.11i, 8.3.3.4.5) */ | |
1735 | if (entry->ccmp) { | |
1736 | int i; | |
4325f6ca | 1737 | u8 pn[IEEE80211_CCMP_PN_LEN], *rpn; |
9190252c | 1738 | int queue; |
97359d12 | 1739 | if (!rx->key || rx->key->conf.cipher != WLAN_CIPHER_SUITE_CCMP) |
e4c26add | 1740 | return RX_DROP_UNUSABLE; |
4325f6ca JB |
1741 | memcpy(pn, entry->last_pn, IEEE80211_CCMP_PN_LEN); |
1742 | for (i = IEEE80211_CCMP_PN_LEN - 1; i >= 0; i--) { | |
571ecf67 JB |
1743 | pn[i]++; |
1744 | if (pn[i]) | |
1745 | break; | |
1746 | } | |
9e26297a | 1747 | queue = rx->security_idx; |
9190252c | 1748 | rpn = rx->key->u.ccmp.rx_pn[queue]; |
4325f6ca | 1749 | if (memcmp(pn, rpn, IEEE80211_CCMP_PN_LEN)) |
e4c26add | 1750 | return RX_DROP_UNUSABLE; |
4325f6ca | 1751 | memcpy(entry->last_pn, pn, IEEE80211_CCMP_PN_LEN); |
571ecf67 JB |
1752 | } |
1753 | ||
358c8d9d | 1754 | skb_pull(rx->skb, ieee80211_hdrlen(fc)); |
571ecf67 JB |
1755 | __skb_queue_tail(&entry->skb_list, rx->skb); |
1756 | entry->last_frag = frag; | |
1757 | entry->extra_len += rx->skb->len; | |
358c8d9d | 1758 | if (ieee80211_has_morefrags(fc)) { |
571ecf67 | 1759 | rx->skb = NULL; |
9ae54c84 | 1760 | return RX_QUEUED; |
571ecf67 JB |
1761 | } |
1762 | ||
1763 | rx->skb = __skb_dequeue(&entry->skb_list); | |
1764 | if (skb_tailroom(rx->skb) < entry->extra_len) { | |
1765 | I802_DEBUG_INC(rx->local->rx_expand_skb_head2); | |
1766 | if (unlikely(pskb_expand_head(rx->skb, 0, entry->extra_len, | |
1767 | GFP_ATOMIC))) { | |
1768 | I802_DEBUG_INC(rx->local->rx_handlers_drop_defrag); | |
1769 | __skb_queue_purge(&entry->skb_list); | |
e4c26add | 1770 | return RX_DROP_UNUSABLE; |
571ecf67 JB |
1771 | } |
1772 | } | |
1773 | while ((skb = __skb_dequeue(&entry->skb_list))) { | |
1774 | memcpy(skb_put(rx->skb, skb->len), skb->data, skb->len); | |
1775 | dev_kfree_skb(skb); | |
1776 | } | |
1777 | ||
1778 | /* Complete frame has been reassembled - process it now */ | |
554891e6 JB |
1779 | status = IEEE80211_SKB_RXCB(rx->skb); |
1780 | status->rx_flags |= IEEE80211_RX_FRAGMENTED; | |
571ecf67 JB |
1781 | |
1782 | out: | |
1783 | if (rx->sta) | |
1784 | rx->sta->rx_packets++; | |
1785 | if (is_multicast_ether_addr(hdr->addr1)) | |
1786 | rx->local->dot11MulticastReceivedFrameCount++; | |
1787 | else | |
1788 | ieee80211_led_rx(rx->local); | |
9ae54c84 | 1789 | return RX_CONTINUE; |
571ecf67 JB |
1790 | } |
1791 | ||
1df332e8 | 1792 | static int ieee80211_802_1x_port_control(struct ieee80211_rx_data *rx) |
571ecf67 | 1793 | { |
1df332e8 | 1794 | if (unlikely(!rx->sta || !test_sta_flag(rx->sta, WLAN_STA_AUTHORIZED))) |
76ee65bf | 1795 | return -EACCES; |
571ecf67 | 1796 | |
76ee65bf | 1797 | return 0; |
571ecf67 JB |
1798 | } |
1799 | ||
1df332e8 | 1800 | static int ieee80211_drop_unencrypted(struct ieee80211_rx_data *rx, __le16 fc) |
571ecf67 | 1801 | { |
eb9fb5b8 JB |
1802 | struct sk_buff *skb = rx->skb; |
1803 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
1804 | ||
3017b80b | 1805 | /* |
7848ba7d JB |
1806 | * Pass through unencrypted frames if the hardware has |
1807 | * decrypted them already. | |
3017b80b | 1808 | */ |
eb9fb5b8 | 1809 | if (status->flag & RX_FLAG_DECRYPTED) |
76ee65bf | 1810 | return 0; |
571ecf67 JB |
1811 | |
1812 | /* Drop unencrypted frames if key is set. */ | |
358c8d9d HH |
1813 | if (unlikely(!ieee80211_has_protected(fc) && |
1814 | !ieee80211_is_nullfunc(fc) && | |
f2ca3ea4 | 1815 | ieee80211_is_data(fc) && |
b3fc9c6c | 1816 | (rx->key || rx->sdata->drop_unencrypted))) |
76ee65bf | 1817 | return -EACCES; |
bef5d1c7 JB |
1818 | |
1819 | return 0; | |
1820 | } | |
1821 | ||
1df332e8 | 1822 | static int ieee80211_drop_unencrypted_mgmt(struct ieee80211_rx_data *rx) |
bef5d1c7 JB |
1823 | { |
1824 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; | |
e3efca0a | 1825 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
bef5d1c7 | 1826 | __le16 fc = hdr->frame_control; |
bef5d1c7 | 1827 | |
e3efca0a JM |
1828 | /* |
1829 | * Pass through unencrypted frames if the hardware has | |
1830 | * decrypted them already. | |
1831 | */ | |
1832 | if (status->flag & RX_FLAG_DECRYPTED) | |
1833 | return 0; | |
bef5d1c7 | 1834 | |
c2c98fde | 1835 | if (rx->sta && test_sta_flag(rx->sta, WLAN_STA_MFP)) { |
d211e90e JM |
1836 | if (unlikely(!ieee80211_has_protected(fc) && |
1837 | ieee80211_is_unicast_robust_mgmt_frame(rx->skb) && | |
cf4e594e | 1838 | rx->key)) { |
6ff57cf8 JB |
1839 | if (ieee80211_is_deauth(fc) || |
1840 | ieee80211_is_disassoc(fc)) | |
1841 | cfg80211_rx_unprot_mlme_mgmt(rx->sdata->dev, | |
1842 | rx->skb->data, | |
1843 | rx->skb->len); | |
f2ca3ea4 | 1844 | return -EACCES; |
cf4e594e | 1845 | } |
f2ca3ea4 | 1846 | /* BIP does not use Protected field, so need to check MMIE */ |
f64f9e71 | 1847 | if (unlikely(ieee80211_is_multicast_robust_mgmt_frame(rx->skb) && |
cf4e594e | 1848 | ieee80211_get_mmie_keyidx(rx->skb) < 0)) { |
6ff57cf8 JB |
1849 | if (ieee80211_is_deauth(fc) || |
1850 | ieee80211_is_disassoc(fc)) | |
1851 | cfg80211_rx_unprot_mlme_mgmt(rx->sdata->dev, | |
1852 | rx->skb->data, | |
1853 | rx->skb->len); | |
f2ca3ea4 | 1854 | return -EACCES; |
cf4e594e | 1855 | } |
f2ca3ea4 JM |
1856 | /* |
1857 | * When using MFP, Action frames are not allowed prior to | |
1858 | * having configured keys. | |
1859 | */ | |
1860 | if (unlikely(ieee80211_is_action(fc) && !rx->key && | |
d8ca16db | 1861 | ieee80211_is_robust_mgmt_frame(rx->skb))) |
f2ca3ea4 JM |
1862 | return -EACCES; |
1863 | } | |
b3fc9c6c | 1864 | |
76ee65bf | 1865 | return 0; |
571ecf67 JB |
1866 | } |
1867 | ||
76ee65bf | 1868 | static int |
4114fa21 | 1869 | __ieee80211_data_to_8023(struct ieee80211_rx_data *rx, bool *port_control) |
571ecf67 | 1870 | { |
eb9fb5b8 | 1871 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
f14543ee | 1872 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
fbb327c5 FF |
1873 | bool check_port_control = false; |
1874 | struct ethhdr *ehdr; | |
1875 | int ret; | |
f14543ee | 1876 | |
4114fa21 | 1877 | *port_control = false; |
9bc383de JB |
1878 | if (ieee80211_has_a4(hdr->frame_control) && |
1879 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN && !sdata->u.vlan.sta) | |
f14543ee | 1880 | return -1; |
9bc383de | 1881 | |
fbb327c5 FF |
1882 | if (sdata->vif.type == NL80211_IFTYPE_STATION && |
1883 | !!sdata->u.mgd.use_4addr != !!ieee80211_has_a4(hdr->frame_control)) { | |
1884 | ||
1885 | if (!sdata->u.mgd.use_4addr) | |
1886 | return -1; | |
1887 | else | |
1888 | check_port_control = true; | |
1889 | } | |
1890 | ||
9bc383de | 1891 | if (is_multicast_ether_addr(hdr->addr1) && |
fbb327c5 | 1892 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN && sdata->u.vlan.sta) |
f14543ee | 1893 | return -1; |
571ecf67 | 1894 | |
fbb327c5 | 1895 | ret = ieee80211_data_to_8023(rx->skb, sdata->vif.addr, sdata->vif.type); |
4114fa21 | 1896 | if (ret < 0) |
fbb327c5 FF |
1897 | return ret; |
1898 | ||
1899 | ehdr = (struct ethhdr *) rx->skb->data; | |
4114fa21 FF |
1900 | if (ehdr->h_proto == rx->sdata->control_port_protocol) |
1901 | *port_control = true; | |
1902 | else if (check_port_control) | |
fbb327c5 FF |
1903 | return -1; |
1904 | ||
1905 | return 0; | |
76ee65bf | 1906 | } |
571ecf67 | 1907 | |
ce3edf6d JB |
1908 | /* |
1909 | * requires that rx->skb is a frame with ethernet header | |
1910 | */ | |
358c8d9d | 1911 | static bool ieee80211_frame_allowed(struct ieee80211_rx_data *rx, __le16 fc) |
ce3edf6d | 1912 | { |
c97c23e3 | 1913 | static const u8 pae_group_addr[ETH_ALEN] __aligned(2) |
ce3edf6d JB |
1914 | = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x03 }; |
1915 | struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data; | |
1916 | ||
1917 | /* | |
1918 | * Allow EAPOL frames to us/the PAE group address regardless | |
1919 | * of whether the frame was encrypted or not. | |
1920 | */ | |
a621fa4d | 1921 | if (ehdr->h_proto == rx->sdata->control_port_protocol && |
3bc7945e JP |
1922 | (ether_addr_equal(ehdr->h_dest, rx->sdata->vif.addr) || |
1923 | ether_addr_equal(ehdr->h_dest, pae_group_addr))) | |
ce3edf6d JB |
1924 | return true; |
1925 | ||
1926 | if (ieee80211_802_1x_port_control(rx) || | |
358c8d9d | 1927 | ieee80211_drop_unencrypted(rx, fc)) |
ce3edf6d JB |
1928 | return false; |
1929 | ||
1930 | return true; | |
1931 | } | |
1932 | ||
1933 | /* | |
1934 | * requires that rx->skb is a frame with ethernet header | |
1935 | */ | |
76ee65bf | 1936 | static void |
5cf121c3 | 1937 | ieee80211_deliver_skb(struct ieee80211_rx_data *rx) |
76ee65bf | 1938 | { |
eb9fb5b8 JB |
1939 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
1940 | struct net_device *dev = sdata->dev; | |
76ee65bf | 1941 | struct sk_buff *skb, *xmit_skb; |
ce3edf6d JB |
1942 | struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data; |
1943 | struct sta_info *dsta; | |
554891e6 | 1944 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
571ecf67 | 1945 | |
76ee65bf RR |
1946 | skb = rx->skb; |
1947 | xmit_skb = NULL; | |
571ecf67 | 1948 | |
05c914fe JB |
1949 | if ((sdata->vif.type == NL80211_IFTYPE_AP || |
1950 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) && | |
213cd118 | 1951 | !(sdata->flags & IEEE80211_SDATA_DONT_BRIDGE_PACKETS) && |
554891e6 | 1952 | (status->rx_flags & IEEE80211_RX_RA_MATCH) && |
9bc383de | 1953 | (sdata->vif.type != NL80211_IFTYPE_AP_VLAN || !sdata->u.vlan.sta)) { |
ce3edf6d JB |
1954 | if (is_multicast_ether_addr(ehdr->h_dest)) { |
1955 | /* | |
1956 | * send multicast frames both to higher layers in | |
1957 | * local net stack and back to the wireless medium | |
1958 | */ | |
76ee65bf | 1959 | xmit_skb = skb_copy(skb, GFP_ATOMIC); |
e87cc472 | 1960 | if (!xmit_skb) |
bdcbd8e0 | 1961 | net_info_ratelimited("%s: failed to clone multicast frame\n", |
e87cc472 | 1962 | dev->name); |
571ecf67 | 1963 | } else { |
abe60632 JB |
1964 | dsta = sta_info_get(sdata, skb->data); |
1965 | if (dsta) { | |
ce3edf6d JB |
1966 | /* |
1967 | * The destination station is associated to | |
1968 | * this AP (in this VLAN), so send the frame | |
1969 | * directly to it and do not pass it to local | |
1970 | * net stack. | |
571ecf67 | 1971 | */ |
76ee65bf | 1972 | xmit_skb = skb; |
571ecf67 JB |
1973 | skb = NULL; |
1974 | } | |
571ecf67 JB |
1975 | } |
1976 | } | |
1977 | ||
59d9cb07 | 1978 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS |
9e890a1f JB |
1979 | if (skb) { |
1980 | /* 'align' will only take the values 0 or 2 here since all | |
1981 | * frames are required to be aligned to 2-byte boundaries | |
1982 | * when being passed to mac80211; the code here works just | |
1983 | * as well if that isn't true, but mac80211 assumes it can | |
1984 | * access fields as 2-byte aligned (e.g. for ether_addr_equal) | |
d1c3a37c | 1985 | */ |
9e890a1f JB |
1986 | int align; |
1987 | ||
1988 | align = (unsigned long)(skb->data + sizeof(struct ethhdr)) & 3; | |
d1c3a37c JB |
1989 | if (align) { |
1990 | if (WARN_ON(skb_headroom(skb) < 3)) { | |
1991 | dev_kfree_skb(skb); | |
1992 | skb = NULL; | |
1993 | } else { | |
1994 | u8 *data = skb->data; | |
8ce0b589 ZY |
1995 | size_t len = skb_headlen(skb); |
1996 | skb->data -= align; | |
1997 | memmove(skb->data, data, len); | |
1998 | skb_set_tail_pointer(skb, len); | |
d1c3a37c JB |
1999 | } |
2000 | } | |
9e890a1f | 2001 | } |
d1c3a37c JB |
2002 | #endif |
2003 | ||
9e890a1f JB |
2004 | if (skb) { |
2005 | /* deliver to local stack */ | |
2006 | skb->protocol = eth_type_trans(skb, dev); | |
2007 | memset(skb->cb, 0, sizeof(skb->cb)); | |
06d181a8 JB |
2008 | if (rx->local->napi) |
2009 | napi_gro_receive(rx->local->napi, skb); | |
2010 | else | |
2011 | netif_receive_skb(skb); | |
571ecf67 JB |
2012 | } |
2013 | ||
76ee65bf | 2014 | if (xmit_skb) { |
aef6c928 HS |
2015 | /* |
2016 | * Send to wireless media and increase priority by 256 to | |
2017 | * keep the received priority instead of reclassifying | |
2018 | * the frame (see cfg80211_classify8021d). | |
2019 | */ | |
2020 | xmit_skb->priority += 256; | |
f831e909 | 2021 | xmit_skb->protocol = htons(ETH_P_802_3); |
ce3edf6d JB |
2022 | skb_reset_network_header(xmit_skb); |
2023 | skb_reset_mac_header(xmit_skb); | |
76ee65bf | 2024 | dev_queue_xmit(xmit_skb); |
571ecf67 | 2025 | } |
76ee65bf RR |
2026 | } |
2027 | ||
49461622 | 2028 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 2029 | ieee80211_rx_h_amsdu(struct ieee80211_rx_data *rx) |
fd4c7f2f | 2030 | { |
eb9fb5b8 | 2031 | struct net_device *dev = rx->sdata->dev; |
eaf85ca7 | 2032 | struct sk_buff *skb = rx->skb; |
358c8d9d HH |
2033 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
2034 | __le16 fc = hdr->frame_control; | |
eaf85ca7 | 2035 | struct sk_buff_head frame_list; |
554891e6 | 2036 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
fd4c7f2f | 2037 | |
358c8d9d | 2038 | if (unlikely(!ieee80211_is_data(fc))) |
9ae54c84 | 2039 | return RX_CONTINUE; |
fd4c7f2f | 2040 | |
358c8d9d | 2041 | if (unlikely(!ieee80211_is_data_present(fc))) |
e4c26add | 2042 | return RX_DROP_MONITOR; |
fd4c7f2f | 2043 | |
554891e6 | 2044 | if (!(status->rx_flags & IEEE80211_RX_AMSDU)) |
9ae54c84 | 2045 | return RX_CONTINUE; |
fd4c7f2f | 2046 | |
eaf85ca7 ZY |
2047 | if (ieee80211_has_a4(hdr->frame_control) && |
2048 | rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
2049 | !rx->sdata->u.vlan.sta) | |
e4c26add | 2050 | return RX_DROP_UNUSABLE; |
fd4c7f2f | 2051 | |
eaf85ca7 ZY |
2052 | if (is_multicast_ether_addr(hdr->addr1) && |
2053 | ((rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && | |
2054 | rx->sdata->u.vlan.sta) || | |
2055 | (rx->sdata->vif.type == NL80211_IFTYPE_STATION && | |
2056 | rx->sdata->u.mgd.use_4addr))) | |
e4c26add | 2057 | return RX_DROP_UNUSABLE; |
fd4c7f2f | 2058 | |
eaf85ca7 ZY |
2059 | skb->dev = dev; |
2060 | __skb_queue_head_init(&frame_list); | |
fd4c7f2f | 2061 | |
e3cf8b3f ZY |
2062 | if (skb_linearize(skb)) |
2063 | return RX_DROP_UNUSABLE; | |
2064 | ||
eaf85ca7 ZY |
2065 | ieee80211_amsdu_to_8023s(skb, &frame_list, dev->dev_addr, |
2066 | rx->sdata->vif.type, | |
8b3becad | 2067 | rx->local->hw.extra_tx_headroom, true); |
fd4c7f2f | 2068 | |
eaf85ca7 ZY |
2069 | while (!skb_queue_empty(&frame_list)) { |
2070 | rx->skb = __skb_dequeue(&frame_list); | |
fd4c7f2f | 2071 | |
358c8d9d | 2072 | if (!ieee80211_frame_allowed(rx, fc)) { |
eaf85ca7 | 2073 | dev_kfree_skb(rx->skb); |
ce3edf6d JB |
2074 | continue; |
2075 | } | |
eaf85ca7 ZY |
2076 | dev->stats.rx_packets++; |
2077 | dev->stats.rx_bytes += rx->skb->len; | |
fd4c7f2f RR |
2078 | |
2079 | ieee80211_deliver_skb(rx); | |
2080 | } | |
2081 | ||
9ae54c84 | 2082 | return RX_QUEUED; |
fd4c7f2f RR |
2083 | } |
2084 | ||
bf94e17b | 2085 | #ifdef CONFIG_MAC80211_MESH |
b0dee578 | 2086 | static ieee80211_rx_result |
e32f85f7 LCC |
2087 | ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx) |
2088 | { | |
30789eb6 TP |
2089 | struct ieee80211_hdr *fwd_hdr, *hdr; |
2090 | struct ieee80211_tx_info *info; | |
e32f85f7 | 2091 | struct ieee80211s_hdr *mesh_hdr; |
e32f85f7 | 2092 | struct sk_buff *skb = rx->skb, *fwd_skb; |
3b8d81e0 | 2093 | struct ieee80211_local *local = rx->local; |
eb9fb5b8 | 2094 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
554891e6 | 2095 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
30789eb6 | 2096 | struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; |
30789eb6 | 2097 | u16 q, hdrlen; |
e32f85f7 LCC |
2098 | |
2099 | hdr = (struct ieee80211_hdr *) skb->data; | |
2100 | hdrlen = ieee80211_hdrlen(hdr->frame_control); | |
9b395bc3 JB |
2101 | |
2102 | /* make sure fixed part of mesh header is there, also checks skb len */ | |
2103 | if (!pskb_may_pull(rx->skb, hdrlen + 6)) | |
2104 | return RX_DROP_MONITOR; | |
2105 | ||
2106 | mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen); | |
2107 | ||
2108 | /* make sure full mesh header is there, also checks skb len */ | |
2109 | if (!pskb_may_pull(rx->skb, | |
2110 | hdrlen + ieee80211_get_mesh_hdrlen(mesh_hdr))) | |
2111 | return RX_DROP_MONITOR; | |
2112 | ||
2113 | /* reload pointers */ | |
2114 | hdr = (struct ieee80211_hdr *) skb->data; | |
e32f85f7 LCC |
2115 | mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen); |
2116 | ||
2157fdd6 TP |
2117 | /* frame is in RMC, don't forward */ |
2118 | if (ieee80211_is_data(hdr->frame_control) && | |
2119 | is_multicast_ether_addr(hdr->addr1) && | |
bf7cd94d | 2120 | mesh_rmc_check(rx->sdata, hdr->addr3, mesh_hdr)) |
2157fdd6 TP |
2121 | return RX_DROP_MONITOR; |
2122 | ||
555cb715 JC |
2123 | if (!ieee80211_is_data(hdr->frame_control) || |
2124 | !(status->rx_flags & IEEE80211_RX_RA_MATCH)) | |
e32f85f7 LCC |
2125 | return RX_CONTINUE; |
2126 | ||
2127 | if (!mesh_hdr->ttl) | |
e32f85f7 LCC |
2128 | return RX_DROP_MONITOR; |
2129 | ||
43b7b314 | 2130 | if (mesh_hdr->flags & MESH_FLAGS_AE) { |
79617dee | 2131 | struct mesh_path *mppath; |
43b7b314 JC |
2132 | char *proxied_addr; |
2133 | char *mpp_addr; | |
2134 | ||
2135 | if (is_multicast_ether_addr(hdr->addr1)) { | |
2136 | mpp_addr = hdr->addr3; | |
2137 | proxied_addr = mesh_hdr->eaddr1; | |
9b395bc3 JB |
2138 | } else if (mesh_hdr->flags & MESH_FLAGS_AE_A5_A6) { |
2139 | /* has_a4 already checked in ieee80211_rx_mesh_check */ | |
43b7b314 JC |
2140 | mpp_addr = hdr->addr4; |
2141 | proxied_addr = mesh_hdr->eaddr2; | |
9b395bc3 JB |
2142 | } else { |
2143 | return RX_DROP_MONITOR; | |
43b7b314 | 2144 | } |
79617dee | 2145 | |
79617dee | 2146 | rcu_read_lock(); |
bf7cd94d | 2147 | mppath = mpp_path_lookup(sdata, proxied_addr); |
79617dee | 2148 | if (!mppath) { |
bf7cd94d | 2149 | mpp_path_add(sdata, proxied_addr, mpp_addr); |
79617dee Y |
2150 | } else { |
2151 | spin_lock_bh(&mppath->state_lock); | |
b203ca39 | 2152 | if (!ether_addr_equal(mppath->mpp, mpp_addr)) |
43b7b314 | 2153 | memcpy(mppath->mpp, mpp_addr, ETH_ALEN); |
79617dee Y |
2154 | spin_unlock_bh(&mppath->state_lock); |
2155 | } | |
2156 | rcu_read_unlock(); | |
2157 | } | |
2158 | ||
3c5772a5 JC |
2159 | /* Frame has reached destination. Don't forward */ |
2160 | if (!is_multicast_ether_addr(hdr->addr1) && | |
b203ca39 | 2161 | ether_addr_equal(sdata->vif.addr, hdr->addr3)) |
e32f85f7 LCC |
2162 | return RX_CONTINUE; |
2163 | ||
00e96dec | 2164 | q = ieee80211_select_queue_80211(sdata, skb, hdr); |
d3c1597b | 2165 | if (ieee80211_queue_stopped(&local->hw, q)) { |
30789eb6 | 2166 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_congestion); |
d3c1597b TP |
2167 | return RX_DROP_MONITOR; |
2168 | } | |
2169 | skb_set_queue_mapping(skb, q); | |
e32f85f7 | 2170 | |
30789eb6 TP |
2171 | if (!--mesh_hdr->ttl) { |
2172 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_ttl); | |
2ac64cd1 | 2173 | goto out; |
30789eb6 TP |
2174 | } |
2175 | ||
d665508b CYY |
2176 | if (!ifmsh->mshcfg.dot11MeshForwarding) |
2177 | goto out; | |
2178 | ||
30789eb6 TP |
2179 | fwd_skb = skb_copy(skb, GFP_ATOMIC); |
2180 | if (!fwd_skb) { | |
bdcbd8e0 | 2181 | net_info_ratelimited("%s: failed to clone mesh frame\n", |
e87cc472 | 2182 | sdata->name); |
30789eb6 TP |
2183 | goto out; |
2184 | } | |
2185 | ||
2186 | fwd_hdr = (struct ieee80211_hdr *) fwd_skb->data; | |
9d6d6f49 | 2187 | fwd_hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_RETRY); |
30789eb6 TP |
2188 | info = IEEE80211_SKB_CB(fwd_skb); |
2189 | memset(info, 0, sizeof(*info)); | |
2190 | info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING; | |
2191 | info->control.vif = &rx->sdata->vif; | |
2192 | info->control.jiffies = jiffies; | |
2193 | if (is_multicast_ether_addr(fwd_hdr->addr1)) { | |
2194 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_mcast); | |
2195 | memcpy(fwd_hdr->addr2, sdata->vif.addr, ETH_ALEN); | |
3f52b7e3 MP |
2196 | /* update power mode indication when forwarding */ |
2197 | ieee80211_mps_set_frame_flags(sdata, NULL, fwd_hdr); | |
bf7cd94d | 2198 | } else if (!mesh_nexthop_lookup(sdata, fwd_skb)) { |
3f52b7e3 | 2199 | /* mesh power mode flags updated in mesh_nexthop_lookup */ |
30789eb6 TP |
2200 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_unicast); |
2201 | } else { | |
2202 | /* unable to resolve next hop */ | |
bf7cd94d | 2203 | mesh_path_error_tx(sdata, ifmsh->mshcfg.element_ttl, |
f63f8421 CYY |
2204 | fwd_hdr->addr3, 0, |
2205 | WLAN_REASON_MESH_PATH_NOFORWARD, | |
2206 | fwd_hdr->addr2); | |
30789eb6 | 2207 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_no_route); |
74b8cc3d | 2208 | kfree_skb(fwd_skb); |
30789eb6 | 2209 | return RX_DROP_MONITOR; |
e32f85f7 LCC |
2210 | } |
2211 | ||
30789eb6 TP |
2212 | IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_frames); |
2213 | ieee80211_add_pending_skb(local, fwd_skb); | |
b51aff05 | 2214 | out: |
3c5772a5 | 2215 | if (is_multicast_ether_addr(hdr->addr1) || |
eb9fb5b8 | 2216 | sdata->dev->flags & IFF_PROMISC) |
e32f85f7 LCC |
2217 | return RX_CONTINUE; |
2218 | else | |
2219 | return RX_DROP_MONITOR; | |
2220 | } | |
bf94e17b | 2221 | #endif |
e32f85f7 | 2222 | |
49461622 | 2223 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 2224 | ieee80211_rx_h_data(struct ieee80211_rx_data *rx) |
76ee65bf | 2225 | { |
eb9fb5b8 | 2226 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
e15276a4 | 2227 | struct ieee80211_local *local = rx->local; |
eb9fb5b8 | 2228 | struct net_device *dev = sdata->dev; |
358c8d9d HH |
2229 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; |
2230 | __le16 fc = hdr->frame_control; | |
4114fa21 | 2231 | bool port_control; |
ce3edf6d | 2232 | int err; |
76ee65bf | 2233 | |
358c8d9d | 2234 | if (unlikely(!ieee80211_is_data(hdr->frame_control))) |
9ae54c84 | 2235 | return RX_CONTINUE; |
76ee65bf | 2236 | |
358c8d9d | 2237 | if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) |
e4c26add | 2238 | return RX_DROP_MONITOR; |
76ee65bf | 2239 | |
f14543ee | 2240 | /* |
e7f4a940 JB |
2241 | * Send unexpected-4addr-frame event to hostapd. For older versions, |
2242 | * also drop the frame to cooked monitor interfaces. | |
f14543ee FF |
2243 | */ |
2244 | if (ieee80211_has_a4(hdr->frame_control) && | |
e7f4a940 JB |
2245 | sdata->vif.type == NL80211_IFTYPE_AP) { |
2246 | if (rx->sta && | |
2247 | !test_and_set_sta_flag(rx->sta, WLAN_STA_4ADDR_EVENT)) | |
2248 | cfg80211_rx_unexpected_4addr_frame( | |
2249 | rx->sdata->dev, rx->sta->sta.addr, GFP_ATOMIC); | |
f14543ee | 2250 | return RX_DROP_MONITOR; |
e7f4a940 | 2251 | } |
f14543ee | 2252 | |
4114fa21 | 2253 | err = __ieee80211_data_to_8023(rx, &port_control); |
76ee65bf | 2254 | if (unlikely(err)) |
e4c26add | 2255 | return RX_DROP_UNUSABLE; |
76ee65bf | 2256 | |
358c8d9d | 2257 | if (!ieee80211_frame_allowed(rx, fc)) |
e4c26add | 2258 | return RX_DROP_MONITOR; |
ce3edf6d | 2259 | |
4114fa21 FF |
2260 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && |
2261 | unlikely(port_control) && sdata->bss) { | |
2262 | sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, | |
2263 | u.ap); | |
2264 | dev = sdata->dev; | |
2265 | rx->sdata = sdata; | |
2266 | } | |
2267 | ||
76ee65bf RR |
2268 | rx->skb->dev = dev; |
2269 | ||
2270 | dev->stats.rx_packets++; | |
2271 | dev->stats.rx_bytes += rx->skb->len; | |
2272 | ||
08ca944e | 2273 | if (local->ps_sdata && local->hw.conf.dynamic_ps_timeout > 0 && |
8c99f691 RM |
2274 | !is_multicast_ether_addr( |
2275 | ((struct ethhdr *)rx->skb->data)->h_dest) && | |
2276 | (!local->scanning && | |
2277 | !test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state))) { | |
e15276a4 VN |
2278 | mod_timer(&local->dynamic_ps_timer, jiffies + |
2279 | msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout)); | |
2280 | } | |
2281 | ||
76ee65bf | 2282 | ieee80211_deliver_skb(rx); |
571ecf67 | 2283 | |
9ae54c84 | 2284 | return RX_QUEUED; |
571ecf67 JB |
2285 | } |
2286 | ||
49461622 | 2287 | static ieee80211_rx_result debug_noinline |
f9e124fb | 2288 | ieee80211_rx_h_ctrl(struct ieee80211_rx_data *rx, struct sk_buff_head *frames) |
71364716 | 2289 | { |
71364716 | 2290 | struct sk_buff *skb = rx->skb; |
a7767f95 | 2291 | struct ieee80211_bar *bar = (struct ieee80211_bar *)skb->data; |
71364716 RR |
2292 | struct tid_ampdu_rx *tid_agg_rx; |
2293 | u16 start_seq_num; | |
2294 | u16 tid; | |
2295 | ||
a7767f95 | 2296 | if (likely(!ieee80211_is_ctl(bar->frame_control))) |
9ae54c84 | 2297 | return RX_CONTINUE; |
71364716 | 2298 | |
a7767f95 | 2299 | if (ieee80211_is_back_req(bar->frame_control)) { |
8ae5977f JB |
2300 | struct { |
2301 | __le16 control, start_seq_num; | |
2302 | } __packed bar_data; | |
2303 | ||
71364716 | 2304 | if (!rx->sta) |
a02ae758 | 2305 | return RX_DROP_MONITOR; |
8ae5977f JB |
2306 | |
2307 | if (skb_copy_bits(skb, offsetof(struct ieee80211_bar, control), | |
2308 | &bar_data, sizeof(bar_data))) | |
2309 | return RX_DROP_MONITOR; | |
2310 | ||
8ae5977f | 2311 | tid = le16_to_cpu(bar_data.control) >> 12; |
a87f736d JB |
2312 | |
2313 | tid_agg_rx = rcu_dereference(rx->sta->ampdu_mlme.tid_rx[tid]); | |
2314 | if (!tid_agg_rx) | |
a02ae758 | 2315 | return RX_DROP_MONITOR; |
71364716 | 2316 | |
8ae5977f | 2317 | start_seq_num = le16_to_cpu(bar_data.start_seq_num) >> 4; |
71364716 RR |
2318 | |
2319 | /* reset session timer */ | |
20ad19d0 JB |
2320 | if (tid_agg_rx->timeout) |
2321 | mod_timer(&tid_agg_rx->session_timer, | |
2322 | TU_TO_EXP_TIME(tid_agg_rx->timeout)); | |
71364716 | 2323 | |
dd318575 | 2324 | spin_lock(&tid_agg_rx->reorder_lock); |
a02ae758 | 2325 | /* release stored frames up to start of BAR */ |
d3b2fb53 | 2326 | ieee80211_release_reorder_frames(rx->sdata, tid_agg_rx, |
f9e124fb | 2327 | start_seq_num, frames); |
dd318575 JB |
2328 | spin_unlock(&tid_agg_rx->reorder_lock); |
2329 | ||
a02ae758 JB |
2330 | kfree_skb(skb); |
2331 | return RX_QUEUED; | |
71364716 RR |
2332 | } |
2333 | ||
08daecae JB |
2334 | /* |
2335 | * After this point, we only want management frames, | |
2336 | * so we can drop all remaining control frames to | |
2337 | * cooked monitor interfaces. | |
2338 | */ | |
2339 | return RX_DROP_MONITOR; | |
71364716 RR |
2340 | } |
2341 | ||
f4f727a6 JM |
2342 | static void ieee80211_process_sa_query_req(struct ieee80211_sub_if_data *sdata, |
2343 | struct ieee80211_mgmt *mgmt, | |
2344 | size_t len) | |
fea14732 JM |
2345 | { |
2346 | struct ieee80211_local *local = sdata->local; | |
2347 | struct sk_buff *skb; | |
2348 | struct ieee80211_mgmt *resp; | |
2349 | ||
b203ca39 | 2350 | if (!ether_addr_equal(mgmt->da, sdata->vif.addr)) { |
fea14732 JM |
2351 | /* Not to own unicast address */ |
2352 | return; | |
2353 | } | |
2354 | ||
b203ca39 JP |
2355 | if (!ether_addr_equal(mgmt->sa, sdata->u.mgd.bssid) || |
2356 | !ether_addr_equal(mgmt->bssid, sdata->u.mgd.bssid)) { | |
77fdaa12 | 2357 | /* Not from the current AP or not associated yet. */ |
fea14732 JM |
2358 | return; |
2359 | } | |
2360 | ||
2361 | if (len < 24 + 1 + sizeof(resp->u.action.u.sa_query)) { | |
2362 | /* Too short SA Query request frame */ | |
2363 | return; | |
2364 | } | |
2365 | ||
2366 | skb = dev_alloc_skb(sizeof(*resp) + local->hw.extra_tx_headroom); | |
2367 | if (skb == NULL) | |
2368 | return; | |
2369 | ||
2370 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
2371 | resp = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
2372 | memset(resp, 0, 24); | |
2373 | memcpy(resp->da, mgmt->sa, ETH_ALEN); | |
47846c9b | 2374 | memcpy(resp->sa, sdata->vif.addr, ETH_ALEN); |
46900298 | 2375 | memcpy(resp->bssid, sdata->u.mgd.bssid, ETH_ALEN); |
fea14732 JM |
2376 | resp->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
2377 | IEEE80211_STYPE_ACTION); | |
2378 | skb_put(skb, 1 + sizeof(resp->u.action.u.sa_query)); | |
2379 | resp->u.action.category = WLAN_CATEGORY_SA_QUERY; | |
2380 | resp->u.action.u.sa_query.action = WLAN_ACTION_SA_QUERY_RESPONSE; | |
2381 | memcpy(resp->u.action.u.sa_query.trans_id, | |
2382 | mgmt->u.action.u.sa_query.trans_id, | |
2383 | WLAN_SA_QUERY_TR_ID_LEN); | |
2384 | ||
62ae67be | 2385 | ieee80211_tx_skb(sdata, skb); |
fea14732 JM |
2386 | } |
2387 | ||
2e161f78 JB |
2388 | static ieee80211_rx_result debug_noinline |
2389 | ieee80211_rx_h_mgmt_check(struct ieee80211_rx_data *rx) | |
2390 | { | |
2391 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; | |
554891e6 | 2392 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
2e161f78 JB |
2393 | |
2394 | /* | |
2395 | * From here on, look only at management frames. | |
2396 | * Data and control frames are already handled, | |
2397 | * and unknown (reserved) frames are useless. | |
2398 | */ | |
2399 | if (rx->skb->len < 24) | |
2400 | return RX_DROP_MONITOR; | |
2401 | ||
2402 | if (!ieee80211_is_mgmt(mgmt->frame_control)) | |
2403 | return RX_DROP_MONITOR; | |
2404 | ||
ee971924 JB |
2405 | if (rx->sdata->vif.type == NL80211_IFTYPE_AP && |
2406 | ieee80211_is_beacon(mgmt->frame_control) && | |
2407 | !(rx->flags & IEEE80211_RX_BEACON_REPORTED)) { | |
804483e9 JB |
2408 | int sig = 0; |
2409 | ||
2410 | if (rx->local->hw.flags & IEEE80211_HW_SIGNAL_DBM) | |
2411 | sig = status->signal; | |
2412 | ||
ee971924 JB |
2413 | cfg80211_report_obss_beacon(rx->local->hw.wiphy, |
2414 | rx->skb->data, rx->skb->len, | |
37c73b5f | 2415 | status->freq, sig); |
ee971924 JB |
2416 | rx->flags |= IEEE80211_RX_BEACON_REPORTED; |
2417 | } | |
2418 | ||
554891e6 | 2419 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
2e161f78 JB |
2420 | return RX_DROP_MONITOR; |
2421 | ||
2422 | if (ieee80211_drop_unencrypted_mgmt(rx)) | |
2423 | return RX_DROP_UNUSABLE; | |
2424 | ||
2425 | return RX_CONTINUE; | |
2426 | } | |
2427 | ||
de1ede7a JB |
2428 | static ieee80211_rx_result debug_noinline |
2429 | ieee80211_rx_h_action(struct ieee80211_rx_data *rx) | |
2430 | { | |
2431 | struct ieee80211_local *local = rx->local; | |
eb9fb5b8 | 2432 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
de1ede7a | 2433 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; |
554891e6 | 2434 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
de1ede7a JB |
2435 | int len = rx->skb->len; |
2436 | ||
2437 | if (!ieee80211_is_action(mgmt->frame_control)) | |
2438 | return RX_CONTINUE; | |
2439 | ||
026331c4 JM |
2440 | /* drop too small frames */ |
2441 | if (len < IEEE80211_MIN_ACTION_SIZE) | |
84040805 | 2442 | return RX_DROP_UNUSABLE; |
de1ede7a | 2443 | |
815b8092 | 2444 | if (!rx->sta && mgmt->u.action.category != WLAN_CATEGORY_PUBLIC && |
cd7760e6 SW |
2445 | mgmt->u.action.category != WLAN_CATEGORY_SELF_PROTECTED && |
2446 | mgmt->u.action.category != WLAN_CATEGORY_SPECTRUM_MGMT) | |
84040805 | 2447 | return RX_DROP_UNUSABLE; |
de1ede7a | 2448 | |
554891e6 | 2449 | if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) |
84040805 | 2450 | return RX_DROP_UNUSABLE; |
97ebe12a | 2451 | |
de1ede7a | 2452 | switch (mgmt->u.action.category) { |
1d8d3dec JB |
2453 | case WLAN_CATEGORY_HT: |
2454 | /* reject HT action frames from stations not supporting HT */ | |
2455 | if (!rx->sta->sta.ht_cap.ht_supported) | |
2456 | goto invalid; | |
2457 | ||
2458 | if (sdata->vif.type != NL80211_IFTYPE_STATION && | |
2459 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && | |
2460 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && | |
2461 | sdata->vif.type != NL80211_IFTYPE_AP && | |
2462 | sdata->vif.type != NL80211_IFTYPE_ADHOC) | |
2463 | break; | |
2464 | ||
ec61cd63 | 2465 | /* verify action & smps_control/chanwidth are present */ |
1d8d3dec JB |
2466 | if (len < IEEE80211_MIN_ACTION_SIZE + 2) |
2467 | goto invalid; | |
2468 | ||
2469 | switch (mgmt->u.action.u.ht_smps.action) { | |
2470 | case WLAN_HT_ACTION_SMPS: { | |
2471 | struct ieee80211_supported_band *sband; | |
af0ed69b | 2472 | enum ieee80211_smps_mode smps_mode; |
1d8d3dec JB |
2473 | |
2474 | /* convert to HT capability */ | |
2475 | switch (mgmt->u.action.u.ht_smps.smps_control) { | |
2476 | case WLAN_HT_SMPS_CONTROL_DISABLED: | |
af0ed69b | 2477 | smps_mode = IEEE80211_SMPS_OFF; |
1d8d3dec JB |
2478 | break; |
2479 | case WLAN_HT_SMPS_CONTROL_STATIC: | |
af0ed69b | 2480 | smps_mode = IEEE80211_SMPS_STATIC; |
1d8d3dec JB |
2481 | break; |
2482 | case WLAN_HT_SMPS_CONTROL_DYNAMIC: | |
af0ed69b | 2483 | smps_mode = IEEE80211_SMPS_DYNAMIC; |
1d8d3dec JB |
2484 | break; |
2485 | default: | |
2486 | goto invalid; | |
2487 | } | |
1d8d3dec JB |
2488 | |
2489 | /* if no change do nothing */ | |
af0ed69b | 2490 | if (rx->sta->sta.smps_mode == smps_mode) |
1d8d3dec | 2491 | goto handled; |
af0ed69b | 2492 | rx->sta->sta.smps_mode = smps_mode; |
1d8d3dec JB |
2493 | |
2494 | sband = rx->local->hw.wiphy->bands[status->band]; | |
2495 | ||
64f68e5d JB |
2496 | rate_control_rate_update(local, sband, rx->sta, |
2497 | IEEE80211_RC_SMPS_CHANGED); | |
1d8d3dec JB |
2498 | goto handled; |
2499 | } | |
ec61cd63 JB |
2500 | case WLAN_HT_ACTION_NOTIFY_CHANWIDTH: { |
2501 | struct ieee80211_supported_band *sband; | |
2502 | u8 chanwidth = mgmt->u.action.u.ht_notify_cw.chanwidth; | |
e1a0c6b3 | 2503 | enum ieee80211_sta_rx_bandwidth new_bw; |
ec61cd63 JB |
2504 | |
2505 | /* If it doesn't support 40 MHz it can't change ... */ | |
e1a0c6b3 JB |
2506 | if (!(rx->sta->sta.ht_cap.cap & |
2507 | IEEE80211_HT_CAP_SUP_WIDTH_20_40)) | |
ec61cd63 JB |
2508 | goto handled; |
2509 | ||
e1a0c6b3 JB |
2510 | if (chanwidth == IEEE80211_HT_CHANWIDTH_20MHZ) |
2511 | new_bw = IEEE80211_STA_RX_BW_20; | |
2512 | else | |
2513 | new_bw = ieee80211_sta_cur_vht_bw(rx->sta); | |
ec61cd63 | 2514 | |
e1a0c6b3 | 2515 | if (rx->sta->sta.bandwidth == new_bw) |
ec61cd63 JB |
2516 | goto handled; |
2517 | ||
ec61cd63 JB |
2518 | sband = rx->local->hw.wiphy->bands[status->band]; |
2519 | ||
2520 | rate_control_rate_update(local, sband, rx->sta, | |
2521 | IEEE80211_RC_BW_CHANGED); | |
2522 | goto handled; | |
2523 | } | |
1d8d3dec JB |
2524 | default: |
2525 | goto invalid; | |
2526 | } | |
2527 | ||
0af83d3d | 2528 | break; |
1b3a2e49 JB |
2529 | case WLAN_CATEGORY_PUBLIC: |
2530 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2531 | goto invalid; | |
2532 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
2533 | break; | |
2534 | if (!rx->sta) | |
2535 | break; | |
2536 | if (!ether_addr_equal(mgmt->bssid, sdata->u.mgd.bssid)) | |
2537 | break; | |
2538 | if (mgmt->u.action.u.ext_chan_switch.action_code != | |
2539 | WLAN_PUB_ACTION_EXT_CHANSW_ANN) | |
2540 | break; | |
2541 | if (len < offsetof(struct ieee80211_mgmt, | |
2542 | u.action.u.ext_chan_switch.variable)) | |
2543 | goto invalid; | |
2544 | goto queue; | |
0af83d3d JB |
2545 | case WLAN_CATEGORY_VHT: |
2546 | if (sdata->vif.type != NL80211_IFTYPE_STATION && | |
2547 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && | |
2548 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && | |
2549 | sdata->vif.type != NL80211_IFTYPE_AP && | |
2550 | sdata->vif.type != NL80211_IFTYPE_ADHOC) | |
2551 | break; | |
2552 | ||
2553 | /* verify action code is present */ | |
2554 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2555 | goto invalid; | |
2556 | ||
2557 | switch (mgmt->u.action.u.vht_opmode_notif.action_code) { | |
2558 | case WLAN_VHT_ACTION_OPMODE_NOTIF: { | |
2559 | u8 opmode; | |
2560 | ||
2561 | /* verify opmode is present */ | |
2562 | if (len < IEEE80211_MIN_ACTION_SIZE + 2) | |
2563 | goto invalid; | |
2564 | ||
2565 | opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode; | |
2566 | ||
2567 | ieee80211_vht_handle_opmode(rx->sdata, rx->sta, | |
bee7f586 JB |
2568 | opmode, status->band, |
2569 | false); | |
0af83d3d JB |
2570 | goto handled; |
2571 | } | |
2572 | default: | |
2573 | break; | |
2574 | } | |
1d8d3dec | 2575 | break; |
de1ede7a | 2576 | case WLAN_CATEGORY_BACK: |
8abd3f9b | 2577 | if (sdata->vif.type != NL80211_IFTYPE_STATION && |
ae2772b3 | 2578 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && |
8abd3f9b | 2579 | sdata->vif.type != NL80211_IFTYPE_AP_VLAN && |
13c40c54 AS |
2580 | sdata->vif.type != NL80211_IFTYPE_AP && |
2581 | sdata->vif.type != NL80211_IFTYPE_ADHOC) | |
84040805 | 2582 | break; |
8abd3f9b | 2583 | |
026331c4 JM |
2584 | /* verify action_code is present */ |
2585 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2586 | break; | |
2587 | ||
de1ede7a JB |
2588 | switch (mgmt->u.action.u.addba_req.action_code) { |
2589 | case WLAN_ACTION_ADDBA_REQ: | |
2590 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2591 | sizeof(mgmt->u.action.u.addba_req))) | |
bed7ee6e JB |
2592 | goto invalid; |
2593 | break; | |
de1ede7a JB |
2594 | case WLAN_ACTION_ADDBA_RESP: |
2595 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2596 | sizeof(mgmt->u.action.u.addba_resp))) | |
bed7ee6e JB |
2597 | goto invalid; |
2598 | break; | |
de1ede7a JB |
2599 | case WLAN_ACTION_DELBA: |
2600 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2601 | sizeof(mgmt->u.action.u.delba))) | |
bed7ee6e JB |
2602 | goto invalid; |
2603 | break; | |
2604 | default: | |
2605 | goto invalid; | |
de1ede7a | 2606 | } |
bed7ee6e | 2607 | |
8b58ff83 | 2608 | goto queue; |
39192c0b | 2609 | case WLAN_CATEGORY_SPECTRUM_MGMT: |
026331c4 JM |
2610 | /* verify action_code is present */ |
2611 | if (len < IEEE80211_MIN_ACTION_SIZE + 1) | |
2612 | break; | |
2613 | ||
39192c0b JB |
2614 | switch (mgmt->u.action.u.measurement.action_code) { |
2615 | case WLAN_ACTION_SPCT_MSR_REQ: | |
cd7760e6 SW |
2616 | if (status->band != IEEE80211_BAND_5GHZ) |
2617 | break; | |
2618 | ||
39192c0b JB |
2619 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
2620 | sizeof(mgmt->u.action.u.measurement))) | |
84040805 | 2621 | break; |
cd7760e6 SW |
2622 | |
2623 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
2624 | break; | |
2625 | ||
39192c0b | 2626 | ieee80211_process_measurement_req(sdata, mgmt, len); |
84040805 | 2627 | goto handled; |
cd7760e6 SW |
2628 | case WLAN_ACTION_SPCT_CHL_SWITCH: { |
2629 | u8 *bssid; | |
2630 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2631 | sizeof(mgmt->u.action.u.chan_switch))) | |
84040805 | 2632 | break; |
cc32abd4 | 2633 | |
cd7760e6 | 2634 | if (sdata->vif.type != NL80211_IFTYPE_STATION && |
b8456a14 CYY |
2635 | sdata->vif.type != NL80211_IFTYPE_ADHOC && |
2636 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT) | |
cd7760e6 SW |
2637 | break; |
2638 | ||
2639 | if (sdata->vif.type == NL80211_IFTYPE_STATION) | |
2640 | bssid = sdata->u.mgd.bssid; | |
2641 | else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) | |
2642 | bssid = sdata->u.ibss.bssid; | |
b8456a14 CYY |
2643 | else if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) |
2644 | bssid = mgmt->sa; | |
cd7760e6 SW |
2645 | else |
2646 | break; | |
2647 | ||
2648 | if (!ether_addr_equal(mgmt->bssid, bssid)) | |
84040805 | 2649 | break; |
c481ec97 | 2650 | |
8b58ff83 | 2651 | goto queue; |
cd7760e6 | 2652 | } |
39192c0b JB |
2653 | } |
2654 | break; | |
fea14732 JM |
2655 | case WLAN_CATEGORY_SA_QUERY: |
2656 | if (len < (IEEE80211_MIN_ACTION_SIZE + | |
2657 | sizeof(mgmt->u.action.u.sa_query))) | |
84040805 JB |
2658 | break; |
2659 | ||
fea14732 JM |
2660 | switch (mgmt->u.action.u.sa_query.action) { |
2661 | case WLAN_ACTION_SA_QUERY_REQUEST: | |
2662 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
84040805 | 2663 | break; |
fea14732 | 2664 | ieee80211_process_sa_query_req(sdata, mgmt, len); |
84040805 | 2665 | goto handled; |
fea14732 JM |
2666 | } |
2667 | break; | |
8db09850 | 2668 | case WLAN_CATEGORY_SELF_PROTECTED: |
9b395bc3 JB |
2669 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
2670 | sizeof(mgmt->u.action.u.self_prot.action_code))) | |
2671 | break; | |
2672 | ||
8db09850 TP |
2673 | switch (mgmt->u.action.u.self_prot.action_code) { |
2674 | case WLAN_SP_MESH_PEERING_OPEN: | |
2675 | case WLAN_SP_MESH_PEERING_CLOSE: | |
2676 | case WLAN_SP_MESH_PEERING_CONFIRM: | |
2677 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
2678 | goto invalid; | |
a6dad6a2 | 2679 | if (sdata->u.mesh.user_mpm) |
8db09850 TP |
2680 | /* userspace handles this frame */ |
2681 | break; | |
2682 | goto queue; | |
2683 | case WLAN_SP_MGK_INFORM: | |
2684 | case WLAN_SP_MGK_ACK: | |
2685 | if (!ieee80211_vif_is_mesh(&sdata->vif)) | |
2686 | goto invalid; | |
2687 | break; | |
2688 | } | |
2689 | break; | |
d3aaec8a | 2690 | case WLAN_CATEGORY_MESH_ACTION: |
9b395bc3 JB |
2691 | if (len < (IEEE80211_MIN_ACTION_SIZE + |
2692 | sizeof(mgmt->u.action.u.mesh_action.action_code))) | |
2693 | break; | |
2694 | ||
77a121c3 JB |
2695 | if (!ieee80211_vif_is_mesh(&sdata->vif)) |
2696 | break; | |
25d49e4d | 2697 | if (mesh_action_is_path_sel(mgmt) && |
1df332e8 | 2698 | !mesh_path_sel_is_hwmp(sdata)) |
c7108a71 JC |
2699 | break; |
2700 | goto queue; | |
84040805 | 2701 | } |
026331c4 | 2702 | |
2e161f78 JB |
2703 | return RX_CONTINUE; |
2704 | ||
bed7ee6e | 2705 | invalid: |
554891e6 | 2706 | status->rx_flags |= IEEE80211_RX_MALFORMED_ACTION_FRM; |
2e161f78 JB |
2707 | /* will return in the next handlers */ |
2708 | return RX_CONTINUE; | |
2709 | ||
2710 | handled: | |
2711 | if (rx->sta) | |
2712 | rx->sta->rx_packets++; | |
2713 | dev_kfree_skb(rx->skb); | |
2714 | return RX_QUEUED; | |
2715 | ||
2716 | queue: | |
2717 | rx->skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; | |
2718 | skb_queue_tail(&sdata->skb_queue, rx->skb); | |
2719 | ieee80211_queue_work(&local->hw, &sdata->work); | |
2720 | if (rx->sta) | |
2721 | rx->sta->rx_packets++; | |
2722 | return RX_QUEUED; | |
2723 | } | |
2724 | ||
2725 | static ieee80211_rx_result debug_noinline | |
2726 | ieee80211_rx_h_userspace_mgmt(struct ieee80211_rx_data *rx) | |
2727 | { | |
554891e6 | 2728 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
804483e9 | 2729 | int sig = 0; |
2e161f78 JB |
2730 | |
2731 | /* skip known-bad action frames and return them in the next handler */ | |
554891e6 | 2732 | if (status->rx_flags & IEEE80211_RX_MALFORMED_ACTION_FRM) |
2e161f78 | 2733 | return RX_CONTINUE; |
d7907448 | 2734 | |
026331c4 JM |
2735 | /* |
2736 | * Getting here means the kernel doesn't know how to handle | |
2737 | * it, but maybe userspace does ... include returned frames | |
2738 | * so userspace can register for those to know whether ones | |
2739 | * it transmitted were processed or returned. | |
2740 | */ | |
026331c4 | 2741 | |
804483e9 JB |
2742 | if (rx->local->hw.flags & IEEE80211_HW_SIGNAL_DBM) |
2743 | sig = status->signal; | |
2744 | ||
71bbc994 | 2745 | if (cfg80211_rx_mgmt(&rx->sdata->wdev, status->freq, sig, |
970fdfa8 | 2746 | rx->skb->data, rx->skb->len, 0)) { |
2e161f78 JB |
2747 | if (rx->sta) |
2748 | rx->sta->rx_packets++; | |
2749 | dev_kfree_skb(rx->skb); | |
2750 | return RX_QUEUED; | |
2751 | } | |
2752 | ||
2e161f78 JB |
2753 | return RX_CONTINUE; |
2754 | } | |
2755 | ||
2756 | static ieee80211_rx_result debug_noinline | |
2757 | ieee80211_rx_h_action_return(struct ieee80211_rx_data *rx) | |
2758 | { | |
2759 | struct ieee80211_local *local = rx->local; | |
2760 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data; | |
2761 | struct sk_buff *nskb; | |
2762 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
554891e6 | 2763 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); |
2e161f78 JB |
2764 | |
2765 | if (!ieee80211_is_action(mgmt->frame_control)) | |
2766 | return RX_CONTINUE; | |
2767 | ||
2768 | /* | |
2769 | * For AP mode, hostapd is responsible for handling any action | |
2770 | * frames that we didn't handle, including returning unknown | |
2771 | * ones. For all other modes we will return them to the sender, | |
2772 | * setting the 0x80 bit in the action category, as required by | |
4b5ebccc | 2773 | * 802.11-2012 9.24.4. |
2e161f78 JB |
2774 | * Newer versions of hostapd shall also use the management frame |
2775 | * registration mechanisms, but older ones still use cooked | |
2776 | * monitor interfaces so push all frames there. | |
2777 | */ | |
554891e6 | 2778 | if (!(status->rx_flags & IEEE80211_RX_MALFORMED_ACTION_FRM) && |
2e161f78 JB |
2779 | (sdata->vif.type == NL80211_IFTYPE_AP || |
2780 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN)) | |
2781 | return RX_DROP_MONITOR; | |
026331c4 | 2782 | |
4b5ebccc JB |
2783 | if (is_multicast_ether_addr(mgmt->da)) |
2784 | return RX_DROP_MONITOR; | |
2785 | ||
84040805 JB |
2786 | /* do not return rejected action frames */ |
2787 | if (mgmt->u.action.category & 0x80) | |
2788 | return RX_DROP_UNUSABLE; | |
2789 | ||
2790 | nskb = skb_copy_expand(rx->skb, local->hw.extra_tx_headroom, 0, | |
2791 | GFP_ATOMIC); | |
2792 | if (nskb) { | |
292b4df6 | 2793 | struct ieee80211_mgmt *nmgmt = (void *)nskb->data; |
84040805 | 2794 | |
292b4df6 JL |
2795 | nmgmt->u.action.category |= 0x80; |
2796 | memcpy(nmgmt->da, nmgmt->sa, ETH_ALEN); | |
2797 | memcpy(nmgmt->sa, rx->sdata->vif.addr, ETH_ALEN); | |
84040805 JB |
2798 | |
2799 | memset(nskb->cb, 0, sizeof(nskb->cb)); | |
2800 | ||
07e5a5f5 JB |
2801 | if (rx->sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) { |
2802 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(nskb); | |
2803 | ||
2804 | info->flags = IEEE80211_TX_CTL_TX_OFFCHAN | | |
2805 | IEEE80211_TX_INTFL_OFFCHAN_TX_OK | | |
2806 | IEEE80211_TX_CTL_NO_CCK_RATE; | |
2807 | if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) | |
2808 | info->hw_queue = | |
2809 | local->hw.offchannel_tx_hw_queue; | |
2810 | } | |
2811 | ||
2812 | __ieee80211_tx_skb_tid_band(rx->sdata, nskb, 7, | |
2813 | status->band); | |
de1ede7a | 2814 | } |
39192c0b JB |
2815 | dev_kfree_skb(rx->skb); |
2816 | return RX_QUEUED; | |
de1ede7a JB |
2817 | } |
2818 | ||
49461622 | 2819 | static ieee80211_rx_result debug_noinline |
5cf121c3 | 2820 | ieee80211_rx_h_mgmt(struct ieee80211_rx_data *rx) |
571ecf67 | 2821 | { |
eb9fb5b8 | 2822 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
77a121c3 JB |
2823 | struct ieee80211_mgmt *mgmt = (void *)rx->skb->data; |
2824 | __le16 stype; | |
571ecf67 | 2825 | |
77a121c3 | 2826 | stype = mgmt->frame_control & cpu_to_le16(IEEE80211_FCTL_STYPE); |
472dbc45 | 2827 | |
77a121c3 JB |
2828 | if (!ieee80211_vif_is_mesh(&sdata->vif) && |
2829 | sdata->vif.type != NL80211_IFTYPE_ADHOC && | |
239281f8 | 2830 | sdata->vif.type != NL80211_IFTYPE_OCB && |
77a121c3 JB |
2831 | sdata->vif.type != NL80211_IFTYPE_STATION) |
2832 | return RX_DROP_MONITOR; | |
472dbc45 | 2833 | |
77a121c3 | 2834 | switch (stype) { |
66e67e41 | 2835 | case cpu_to_le16(IEEE80211_STYPE_AUTH): |
77a121c3 JB |
2836 | case cpu_to_le16(IEEE80211_STYPE_BEACON): |
2837 | case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP): | |
2838 | /* process for all: mesh, mlme, ibss */ | |
2839 | break; | |
66e67e41 JB |
2840 | case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP): |
2841 | case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP): | |
77a121c3 JB |
2842 | case cpu_to_le16(IEEE80211_STYPE_DEAUTH): |
2843 | case cpu_to_le16(IEEE80211_STYPE_DISASSOC): | |
2c31333a CL |
2844 | if (is_multicast_ether_addr(mgmt->da) && |
2845 | !is_broadcast_ether_addr(mgmt->da)) | |
2846 | return RX_DROP_MONITOR; | |
2847 | ||
77a121c3 JB |
2848 | /* process only for station */ |
2849 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
2850 | return RX_DROP_MONITOR; | |
2851 | break; | |
2852 | case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ): | |
9fb04b50 TP |
2853 | /* process only for ibss and mesh */ |
2854 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC && | |
2855 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT) | |
77a121c3 JB |
2856 | return RX_DROP_MONITOR; |
2857 | break; | |
2858 | default: | |
2859 | return RX_DROP_MONITOR; | |
2860 | } | |
f9d540ee | 2861 | |
77a121c3 | 2862 | /* queue up frame and kick off work to process it */ |
c1475ca9 | 2863 | rx->skb->pkt_type = IEEE80211_SDATA_QUEUE_TYPE_FRAME; |
77a121c3 JB |
2864 | skb_queue_tail(&sdata->skb_queue, rx->skb); |
2865 | ieee80211_queue_work(&rx->local->hw, &sdata->work); | |
8b58ff83 JB |
2866 | if (rx->sta) |
2867 | rx->sta->rx_packets++; | |
46900298 | 2868 | |
77a121c3 | 2869 | return RX_QUEUED; |
571ecf67 JB |
2870 | } |
2871 | ||
5cf121c3 | 2872 | /* TODO: use IEEE80211_RX_FRAGMENTED */ |
5f0b7de5 JB |
2873 | static void ieee80211_rx_cooked_monitor(struct ieee80211_rx_data *rx, |
2874 | struct ieee80211_rate *rate) | |
3d30d949 MW |
2875 | { |
2876 | struct ieee80211_sub_if_data *sdata; | |
2877 | struct ieee80211_local *local = rx->local; | |
3d30d949 MW |
2878 | struct sk_buff *skb = rx->skb, *skb2; |
2879 | struct net_device *prev_dev = NULL; | |
eb9fb5b8 | 2880 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
293702a3 | 2881 | int needed_headroom; |
3d30d949 | 2882 | |
554891e6 JB |
2883 | /* |
2884 | * If cooked monitor has been processed already, then | |
2885 | * don't do it again. If not, set the flag. | |
2886 | */ | |
2887 | if (rx->flags & IEEE80211_RX_CMNTR) | |
7c1e1831 | 2888 | goto out_free_skb; |
554891e6 | 2889 | rx->flags |= IEEE80211_RX_CMNTR; |
7c1e1831 | 2890 | |
152c477a JB |
2891 | /* If there are no cooked monitor interfaces, just free the SKB */ |
2892 | if (!local->cooked_mntrs) | |
2893 | goto out_free_skb; | |
2894 | ||
293702a3 | 2895 | /* room for the radiotap header based on driver features */ |
90b9e446 | 2896 | needed_headroom = ieee80211_rx_radiotap_space(local, status); |
3d30d949 | 2897 | |
293702a3 JB |
2898 | if (skb_headroom(skb) < needed_headroom && |
2899 | pskb_expand_head(skb, needed_headroom, 0, GFP_ATOMIC)) | |
2900 | goto out_free_skb; | |
3d30d949 | 2901 | |
293702a3 | 2902 | /* prepend radiotap information */ |
973ef21a FF |
2903 | ieee80211_add_rx_radiotap_header(local, skb, rate, needed_headroom, |
2904 | false); | |
3d30d949 MW |
2905 | |
2906 | skb_set_mac_header(skb, 0); | |
2907 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
2908 | skb->pkt_type = PACKET_OTHERHOST; | |
2909 | skb->protocol = htons(ETH_P_802_2); | |
2910 | ||
2911 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
9607e6b6 | 2912 | if (!ieee80211_sdata_running(sdata)) |
3d30d949 MW |
2913 | continue; |
2914 | ||
05c914fe | 2915 | if (sdata->vif.type != NL80211_IFTYPE_MONITOR || |
3d30d949 MW |
2916 | !(sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES)) |
2917 | continue; | |
2918 | ||
2919 | if (prev_dev) { | |
2920 | skb2 = skb_clone(skb, GFP_ATOMIC); | |
2921 | if (skb2) { | |
2922 | skb2->dev = prev_dev; | |
5548a8a1 | 2923 | netif_receive_skb(skb2); |
3d30d949 MW |
2924 | } |
2925 | } | |
2926 | ||
2927 | prev_dev = sdata->dev; | |
2928 | sdata->dev->stats.rx_packets++; | |
2929 | sdata->dev->stats.rx_bytes += skb->len; | |
2930 | } | |
2931 | ||
2932 | if (prev_dev) { | |
2933 | skb->dev = prev_dev; | |
5548a8a1 | 2934 | netif_receive_skb(skb); |
554891e6 JB |
2935 | return; |
2936 | } | |
3d30d949 MW |
2937 | |
2938 | out_free_skb: | |
2939 | dev_kfree_skb(skb); | |
2940 | } | |
2941 | ||
aa0c8636 CL |
2942 | static void ieee80211_rx_handlers_result(struct ieee80211_rx_data *rx, |
2943 | ieee80211_rx_result res) | |
2944 | { | |
2945 | switch (res) { | |
2946 | case RX_DROP_MONITOR: | |
2947 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_drop); | |
2948 | if (rx->sta) | |
2949 | rx->sta->rx_dropped++; | |
2950 | /* fall through */ | |
2951 | case RX_CONTINUE: { | |
2952 | struct ieee80211_rate *rate = NULL; | |
2953 | struct ieee80211_supported_band *sband; | |
2954 | struct ieee80211_rx_status *status; | |
2955 | ||
2956 | status = IEEE80211_SKB_RXCB((rx->skb)); | |
2957 | ||
2958 | sband = rx->local->hw.wiphy->bands[status->band]; | |
5614618e JB |
2959 | if (!(status->flag & RX_FLAG_HT) && |
2960 | !(status->flag & RX_FLAG_VHT)) | |
aa0c8636 CL |
2961 | rate = &sband->bitrates[status->rate_idx]; |
2962 | ||
2963 | ieee80211_rx_cooked_monitor(rx, rate); | |
2964 | break; | |
2965 | } | |
2966 | case RX_DROP_UNUSABLE: | |
2967 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_drop); | |
2968 | if (rx->sta) | |
2969 | rx->sta->rx_dropped++; | |
2970 | dev_kfree_skb(rx->skb); | |
2971 | break; | |
2972 | case RX_QUEUED: | |
2973 | I802_DEBUG_INC(rx->sdata->local->rx_handlers_queued); | |
2974 | break; | |
2975 | } | |
2976 | } | |
571ecf67 | 2977 | |
f9e124fb CL |
2978 | static void ieee80211_rx_handlers(struct ieee80211_rx_data *rx, |
2979 | struct sk_buff_head *frames) | |
58905290 | 2980 | { |
58905290 | 2981 | ieee80211_rx_result res = RX_DROP_MONITOR; |
aa0c8636 | 2982 | struct sk_buff *skb; |
8944b79f | 2983 | |
e32f85f7 LCC |
2984 | #define CALL_RXH(rxh) \ |
2985 | do { \ | |
2986 | res = rxh(rx); \ | |
2987 | if (res != RX_CONTINUE) \ | |
2569a826 | 2988 | goto rxh_next; \ |
e32f85f7 | 2989 | } while (0); |
49461622 | 2990 | |
f9e124fb | 2991 | spin_lock_bh(&rx->local->rx_path_lock); |
24a8fdad | 2992 | |
f9e124fb | 2993 | while ((skb = __skb_dequeue(frames))) { |
2569a826 JB |
2994 | /* |
2995 | * all the other fields are valid across frames | |
2996 | * that belong to an aMPDU since they are on the | |
2997 | * same TID from the same station | |
2998 | */ | |
2999 | rx->skb = skb; | |
3000 | ||
2569a826 | 3001 | CALL_RXH(ieee80211_rx_h_check_more_data) |
47086fc5 | 3002 | CALL_RXH(ieee80211_rx_h_uapsd_and_pspoll) |
2569a826 | 3003 | CALL_RXH(ieee80211_rx_h_sta_process) |
86c228a7 | 3004 | CALL_RXH(ieee80211_rx_h_decrypt) |
2569a826 | 3005 | CALL_RXH(ieee80211_rx_h_defragment) |
2569a826 JB |
3006 | CALL_RXH(ieee80211_rx_h_michael_mic_verify) |
3007 | /* must be after MMIC verify so header is counted in MPDU mic */ | |
bf94e17b | 3008 | #ifdef CONFIG_MAC80211_MESH |
aa0c8636 | 3009 | if (ieee80211_vif_is_mesh(&rx->sdata->vif)) |
2569a826 | 3010 | CALL_RXH(ieee80211_rx_h_mesh_fwding); |
bf94e17b | 3011 | #endif |
2154c81c | 3012 | CALL_RXH(ieee80211_rx_h_amsdu) |
2569a826 | 3013 | CALL_RXH(ieee80211_rx_h_data) |
f9e124fb CL |
3014 | |
3015 | /* special treatment -- needs the queue */ | |
3016 | res = ieee80211_rx_h_ctrl(rx, frames); | |
3017 | if (res != RX_CONTINUE) | |
3018 | goto rxh_next; | |
3019 | ||
2e161f78 | 3020 | CALL_RXH(ieee80211_rx_h_mgmt_check) |
2569a826 | 3021 | CALL_RXH(ieee80211_rx_h_action) |
2e161f78 JB |
3022 | CALL_RXH(ieee80211_rx_h_userspace_mgmt) |
3023 | CALL_RXH(ieee80211_rx_h_action_return) | |
2569a826 | 3024 | CALL_RXH(ieee80211_rx_h_mgmt) |
49461622 | 3025 | |
aa0c8636 CL |
3026 | rxh_next: |
3027 | ieee80211_rx_handlers_result(rx, res); | |
f9e124fb | 3028 | |
49461622 | 3029 | #undef CALL_RXH |
aa0c8636 | 3030 | } |
24a8fdad | 3031 | |
f9e124fb | 3032 | spin_unlock_bh(&rx->local->rx_path_lock); |
aa0c8636 CL |
3033 | } |
3034 | ||
4406c376 | 3035 | static void ieee80211_invoke_rx_handlers(struct ieee80211_rx_data *rx) |
aa0c8636 | 3036 | { |
f9e124fb | 3037 | struct sk_buff_head reorder_release; |
aa0c8636 CL |
3038 | ieee80211_rx_result res = RX_DROP_MONITOR; |
3039 | ||
f9e124fb CL |
3040 | __skb_queue_head_init(&reorder_release); |
3041 | ||
aa0c8636 CL |
3042 | #define CALL_RXH(rxh) \ |
3043 | do { \ | |
3044 | res = rxh(rx); \ | |
3045 | if (res != RX_CONTINUE) \ | |
3046 | goto rxh_next; \ | |
3047 | } while (0); | |
3048 | ||
aa0c8636 CL |
3049 | CALL_RXH(ieee80211_rx_h_check) |
3050 | ||
f9e124fb | 3051 | ieee80211_rx_reorder_ampdu(rx, &reorder_release); |
aa0c8636 | 3052 | |
f9e124fb | 3053 | ieee80211_rx_handlers(rx, &reorder_release); |
aa0c8636 | 3054 | return; |
49461622 | 3055 | |
2569a826 | 3056 | rxh_next: |
aa0c8636 CL |
3057 | ieee80211_rx_handlers_result(rx, res); |
3058 | ||
3059 | #undef CALL_RXH | |
58905290 JB |
3060 | } |
3061 | ||
2bff8ebf | 3062 | /* |
dd318575 JB |
3063 | * This function makes calls into the RX path, therefore |
3064 | * it has to be invoked under RCU read lock. | |
2bff8ebf CL |
3065 | */ |
3066 | void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid) | |
3067 | { | |
f9e124fb | 3068 | struct sk_buff_head frames; |
554891e6 JB |
3069 | struct ieee80211_rx_data rx = { |
3070 | .sta = sta, | |
3071 | .sdata = sta->sdata, | |
3072 | .local = sta->local, | |
9e26297a JB |
3073 | /* This is OK -- must be QoS data frame */ |
3074 | .security_idx = tid, | |
3075 | .seqno_idx = tid, | |
fcf8bd3b | 3076 | .flags = 0, |
554891e6 | 3077 | }; |
2c15a0cf CL |
3078 | struct tid_ampdu_rx *tid_agg_rx; |
3079 | ||
3080 | tid_agg_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]); | |
3081 | if (!tid_agg_rx) | |
3082 | return; | |
2bff8ebf | 3083 | |
f9e124fb CL |
3084 | __skb_queue_head_init(&frames); |
3085 | ||
2c15a0cf | 3086 | spin_lock(&tid_agg_rx->reorder_lock); |
f9e124fb | 3087 | ieee80211_sta_reorder_release(sta->sdata, tid_agg_rx, &frames); |
2c15a0cf | 3088 | spin_unlock(&tid_agg_rx->reorder_lock); |
2bff8ebf | 3089 | |
f9e124fb | 3090 | ieee80211_rx_handlers(&rx, &frames); |
2bff8ebf CL |
3091 | } |
3092 | ||
571ecf67 JB |
3093 | /* main receive path */ |
3094 | ||
3c2723f5 JB |
3095 | static bool prepare_for_handlers(struct ieee80211_rx_data *rx, |
3096 | struct ieee80211_hdr *hdr) | |
23a24def | 3097 | { |
20b01f80 | 3098 | struct ieee80211_sub_if_data *sdata = rx->sdata; |
eb9fb5b8 JB |
3099 | struct sk_buff *skb = rx->skb; |
3100 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
3101 | u8 *bssid = ieee80211_get_bssid(hdr, skb->len, sdata->vif.type); | |
23a24def JB |
3102 | int multicast = is_multicast_ether_addr(hdr->addr1); |
3103 | ||
51fb61e7 | 3104 | switch (sdata->vif.type) { |
05c914fe | 3105 | case NL80211_IFTYPE_STATION: |
9bc383de | 3106 | if (!bssid && !sdata->u.mgd.use_4addr) |
3c2723f5 | 3107 | return false; |
77fdaa12 | 3108 | if (!multicast && |
b203ca39 | 3109 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) { |
4f312336 FF |
3110 | if (!(sdata->dev->flags & IFF_PROMISC) || |
3111 | sdata->u.mgd.use_4addr) | |
3c2723f5 | 3112 | return false; |
554891e6 | 3113 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
23a24def JB |
3114 | } |
3115 | break; | |
05c914fe | 3116 | case NL80211_IFTYPE_ADHOC: |
23a24def | 3117 | if (!bssid) |
3c2723f5 | 3118 | return false; |
6329b8d9 FF |
3119 | if (ether_addr_equal(sdata->vif.addr, hdr->addr2) || |
3120 | ether_addr_equal(sdata->u.ibss.bssid, hdr->addr2)) | |
3c2723f5 | 3121 | return false; |
a7767f95 | 3122 | if (ieee80211_is_beacon(hdr->frame_control)) { |
3c2723f5 | 3123 | return true; |
d48b2968 | 3124 | } else if (!ieee80211_bssid_match(bssid, sdata->u.ibss.bssid)) { |
3c2723f5 | 3125 | return false; |
23a24def | 3126 | } else if (!multicast && |
b203ca39 | 3127 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) { |
4150c572 | 3128 | if (!(sdata->dev->flags & IFF_PROMISC)) |
3c2723f5 | 3129 | return false; |
554891e6 | 3130 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
0fb8ca45 JM |
3131 | } else if (!rx->sta) { |
3132 | int rate_idx; | |
5614618e JB |
3133 | if (status->flag & (RX_FLAG_HT | RX_FLAG_VHT)) |
3134 | rate_idx = 0; /* TODO: HT/VHT rates */ | |
0fb8ca45 | 3135 | else |
eb9fb5b8 | 3136 | rate_idx = status->rate_idx; |
8bf11d8d JB |
3137 | ieee80211_ibss_rx_no_sta(sdata, bssid, hdr->addr2, |
3138 | BIT(rate_idx)); | |
0fb8ca45 | 3139 | } |
23a24def | 3140 | break; |
239281f8 RL |
3141 | case NL80211_IFTYPE_OCB: |
3142 | if (!bssid) | |
3143 | return false; | |
3144 | if (ieee80211_is_beacon(hdr->frame_control)) { | |
3145 | return false; | |
3146 | } else if (!is_broadcast_ether_addr(bssid)) { | |
3147 | ocb_dbg(sdata, "BSSID mismatch in OCB mode!\n"); | |
3148 | return false; | |
3149 | } else if (!multicast && | |
3150 | !ether_addr_equal(sdata->dev->dev_addr, | |
3151 | hdr->addr1)) { | |
3152 | /* if we are in promisc mode we also accept | |
3153 | * packets not destined for us | |
3154 | */ | |
3155 | if (!(sdata->dev->flags & IFF_PROMISC)) | |
3156 | return false; | |
3157 | rx->flags &= ~IEEE80211_RX_RA_MATCH; | |
3158 | } else if (!rx->sta) { | |
3159 | int rate_idx; | |
3160 | if (status->flag & RX_FLAG_HT) | |
3161 | rate_idx = 0; /* TODO: HT rates */ | |
3162 | else | |
3163 | rate_idx = status->rate_idx; | |
3164 | ieee80211_ocb_rx_no_sta(sdata, bssid, hdr->addr2, | |
3165 | BIT(rate_idx)); | |
3166 | } | |
3167 | break; | |
05c914fe | 3168 | case NL80211_IFTYPE_MESH_POINT: |
6032f934 | 3169 | if (!multicast && |
b203ca39 | 3170 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) { |
6032f934 | 3171 | if (!(sdata->dev->flags & IFF_PROMISC)) |
3c2723f5 | 3172 | return false; |
6032f934 | 3173 | |
554891e6 | 3174 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
6032f934 JB |
3175 | } |
3176 | break; | |
05c914fe JB |
3177 | case NL80211_IFTYPE_AP_VLAN: |
3178 | case NL80211_IFTYPE_AP: | |
23a24def | 3179 | if (!bssid) { |
b203ca39 | 3180 | if (!ether_addr_equal(sdata->vif.addr, hdr->addr1)) |
3c2723f5 | 3181 | return false; |
f142c6b9 | 3182 | } else if (!ieee80211_bssid_match(bssid, sdata->vif.addr)) { |
3df6eaea JB |
3183 | /* |
3184 | * Accept public action frames even when the | |
3185 | * BSSID doesn't match, this is used for P2P | |
3186 | * and location updates. Note that mac80211 | |
3187 | * itself never looks at these frames. | |
3188 | */ | |
2b9ccd4e JB |
3189 | if (!multicast && |
3190 | !ether_addr_equal(sdata->vif.addr, hdr->addr1)) | |
3c2723f5 | 3191 | return false; |
d48b2968 | 3192 | if (ieee80211_is_public_action(hdr, skb->len)) |
3c2723f5 | 3193 | return true; |
d48b2968 | 3194 | if (!ieee80211_is_beacon(hdr->frame_control)) |
3c2723f5 | 3195 | return false; |
554891e6 | 3196 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
db8e1732 AN |
3197 | } else if (!ieee80211_has_tods(hdr->frame_control)) { |
3198 | /* ignore data frames to TDLS-peers */ | |
3199 | if (ieee80211_is_data(hdr->frame_control)) | |
3200 | return false; | |
3201 | /* ignore action frames to TDLS-peers */ | |
3202 | if (ieee80211_is_action(hdr->frame_control) && | |
3203 | !ether_addr_equal(bssid, hdr->addr1)) | |
3204 | return false; | |
23a24def | 3205 | } |
23a24def | 3206 | break; |
05c914fe | 3207 | case NL80211_IFTYPE_WDS: |
a7767f95 | 3208 | if (bssid || !ieee80211_is_data(hdr->frame_control)) |
3c2723f5 | 3209 | return false; |
b203ca39 | 3210 | if (!ether_addr_equal(sdata->u.wds.remote_addr, hdr->addr2)) |
3c2723f5 | 3211 | return false; |
23a24def | 3212 | break; |
f142c6b9 JB |
3213 | case NL80211_IFTYPE_P2P_DEVICE: |
3214 | if (!ieee80211_is_public_action(hdr, skb->len) && | |
3215 | !ieee80211_is_probe_req(hdr->frame_control) && | |
3216 | !ieee80211_is_probe_resp(hdr->frame_control) && | |
3217 | !ieee80211_is_beacon(hdr->frame_control)) | |
3c2723f5 | 3218 | return false; |
1b737f88 JB |
3219 | if (!ether_addr_equal(sdata->vif.addr, hdr->addr1) && |
3220 | !multicast) | |
f142c6b9 JB |
3221 | status->rx_flags &= ~IEEE80211_RX_RA_MATCH; |
3222 | break; | |
2ca27bcf | 3223 | default: |
fb1c1cd6 | 3224 | /* should never get here */ |
f142c6b9 | 3225 | WARN_ON_ONCE(1); |
fb1c1cd6 | 3226 | break; |
23a24def JB |
3227 | } |
3228 | ||
3c2723f5 | 3229 | return true; |
23a24def JB |
3230 | } |
3231 | ||
4406c376 JB |
3232 | /* |
3233 | * This function returns whether or not the SKB | |
3234 | * was destined for RX processing or not, which, | |
3235 | * if consume is true, is equivalent to whether | |
3236 | * or not the skb was consumed. | |
3237 | */ | |
3238 | static bool ieee80211_prepare_and_rx_handle(struct ieee80211_rx_data *rx, | |
3239 | struct sk_buff *skb, bool consume) | |
3240 | { | |
3241 | struct ieee80211_local *local = rx->local; | |
3242 | struct ieee80211_sub_if_data *sdata = rx->sdata; | |
3243 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
3244 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
4406c376 JB |
3245 | |
3246 | rx->skb = skb; | |
554891e6 | 3247 | status->rx_flags |= IEEE80211_RX_RA_MATCH; |
4406c376 | 3248 | |
40791942 | 3249 | if (!prepare_for_handlers(rx, hdr)) |
4406c376 JB |
3250 | return false; |
3251 | ||
4406c376 JB |
3252 | if (!consume) { |
3253 | skb = skb_copy(skb, GFP_ATOMIC); | |
3254 | if (!skb) { | |
3255 | if (net_ratelimit()) | |
3256 | wiphy_debug(local->hw.wiphy, | |
b305dae4 | 3257 | "failed to copy skb for %s\n", |
4406c376 JB |
3258 | sdata->name); |
3259 | return true; | |
3260 | } | |
3261 | ||
3262 | rx->skb = skb; | |
3263 | } | |
3264 | ||
3265 | ieee80211_invoke_rx_handlers(rx); | |
3266 | return true; | |
3267 | } | |
3268 | ||
571ecf67 | 3269 | /* |
6b59db7d | 3270 | * This is the actual Rx frames handler. as it belongs to Rx path it must |
6368e4b1 | 3271 | * be called with rcu_read_lock protection. |
571ecf67 | 3272 | */ |
71ebb4aa | 3273 | static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw, |
071d9ac2 | 3274 | struct sk_buff *skb) |
571ecf67 JB |
3275 | { |
3276 | struct ieee80211_local *local = hw_to_local(hw); | |
3277 | struct ieee80211_sub_if_data *sdata; | |
571ecf67 | 3278 | struct ieee80211_hdr *hdr; |
e3cf8b3f | 3279 | __le16 fc; |
5cf121c3 | 3280 | struct ieee80211_rx_data rx; |
4406c376 | 3281 | struct ieee80211_sub_if_data *prev; |
56af3268 | 3282 | struct sta_info *sta, *tmp, *prev_sta; |
e3cf8b3f | 3283 | int err = 0; |
571ecf67 | 3284 | |
e3cf8b3f | 3285 | fc = ((struct ieee80211_hdr *)skb->data)->frame_control; |
571ecf67 JB |
3286 | memset(&rx, 0, sizeof(rx)); |
3287 | rx.skb = skb; | |
3288 | rx.local = local; | |
72abd81b | 3289 | |
e3cf8b3f | 3290 | if (ieee80211_is_data(fc) || ieee80211_is_mgmt(fc)) |
571ecf67 | 3291 | local->dot11ReceivedFragmentCount++; |
571ecf67 | 3292 | |
4a4f1a58 JB |
3293 | if (ieee80211_is_mgmt(fc)) { |
3294 | /* drop frame if too short for header */ | |
3295 | if (skb->len < ieee80211_hdrlen(fc)) | |
3296 | err = -ENOBUFS; | |
3297 | else | |
3298 | err = skb_linearize(skb); | |
3299 | } else { | |
e3cf8b3f | 3300 | err = !pskb_may_pull(skb, ieee80211_hdrlen(fc)); |
4a4f1a58 | 3301 | } |
e3cf8b3f ZY |
3302 | |
3303 | if (err) { | |
3304 | dev_kfree_skb(skb); | |
3305 | return; | |
3306 | } | |
3307 | ||
3308 | hdr = (struct ieee80211_hdr *)skb->data; | |
38f3714d | 3309 | ieee80211_parse_qos(&rx); |
d1c3a37c | 3310 | ieee80211_verify_alignment(&rx); |
38f3714d | 3311 | |
d48b2968 JB |
3312 | if (unlikely(ieee80211_is_probe_resp(hdr->frame_control) || |
3313 | ieee80211_is_beacon(hdr->frame_control))) | |
3314 | ieee80211_scan_rx(local, skb); | |
3315 | ||
e3cf8b3f | 3316 | if (ieee80211_is_data(fc)) { |
56af3268 | 3317 | prev_sta = NULL; |
4406c376 | 3318 | |
7852e361 | 3319 | for_each_sta_info(local, hdr->addr2, sta, tmp) { |
56af3268 BG |
3320 | if (!prev_sta) { |
3321 | prev_sta = sta; | |
3322 | continue; | |
3323 | } | |
3324 | ||
3325 | rx.sta = prev_sta; | |
3326 | rx.sdata = prev_sta->sdata; | |
4406c376 | 3327 | ieee80211_prepare_and_rx_handle(&rx, skb, false); |
abe60632 | 3328 | |
56af3268 | 3329 | prev_sta = sta; |
4406c376 | 3330 | } |
56af3268 BG |
3331 | |
3332 | if (prev_sta) { | |
3333 | rx.sta = prev_sta; | |
3334 | rx.sdata = prev_sta->sdata; | |
3335 | ||
4406c376 | 3336 | if (ieee80211_prepare_and_rx_handle(&rx, skb, true)) |
56af3268 | 3337 | return; |
8e26d5ad | 3338 | goto out; |
56af3268 | 3339 | } |
4406c376 JB |
3340 | } |
3341 | ||
4b0dd98e | 3342 | prev = NULL; |
b2e7771e | 3343 | |
4b0dd98e JB |
3344 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
3345 | if (!ieee80211_sdata_running(sdata)) | |
3346 | continue; | |
340e11f3 | 3347 | |
4b0dd98e JB |
3348 | if (sdata->vif.type == NL80211_IFTYPE_MONITOR || |
3349 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) | |
3350 | continue; | |
340e11f3 | 3351 | |
4b0dd98e JB |
3352 | /* |
3353 | * frame is destined for this interface, but if it's | |
3354 | * not also for the previous one we handle that after | |
3355 | * the loop to avoid copying the SKB once too much | |
3356 | */ | |
4bb29f8c | 3357 | |
4b0dd98e | 3358 | if (!prev) { |
abe60632 | 3359 | prev = sdata; |
4b0dd98e | 3360 | continue; |
340e11f3 | 3361 | } |
4bb29f8c | 3362 | |
7852e361 | 3363 | rx.sta = sta_info_get_bss(prev, hdr->addr2); |
4b0dd98e JB |
3364 | rx.sdata = prev; |
3365 | ieee80211_prepare_and_rx_handle(&rx, skb, false); | |
4bb29f8c | 3366 | |
4b0dd98e JB |
3367 | prev = sdata; |
3368 | } | |
3369 | ||
3370 | if (prev) { | |
7852e361 | 3371 | rx.sta = sta_info_get_bss(prev, hdr->addr2); |
4b0dd98e | 3372 | rx.sdata = prev; |
4406c376 | 3373 | |
4b0dd98e JB |
3374 | if (ieee80211_prepare_and_rx_handle(&rx, skb, true)) |
3375 | return; | |
571ecf67 | 3376 | } |
4406c376 | 3377 | |
8e26d5ad | 3378 | out: |
4406c376 | 3379 | dev_kfree_skb(skb); |
571ecf67 | 3380 | } |
6368e4b1 RR |
3381 | |
3382 | /* | |
3383 | * This is the receive path handler. It is called by a low level driver when an | |
3384 | * 802.11 MPDU is received from the hardware. | |
3385 | */ | |
103bf9f7 | 3386 | void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb) |
6368e4b1 RR |
3387 | { |
3388 | struct ieee80211_local *local = hw_to_local(hw); | |
8318d78a JB |
3389 | struct ieee80211_rate *rate = NULL; |
3390 | struct ieee80211_supported_band *sband; | |
f1d58c25 | 3391 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); |
8318d78a | 3392 | |
d20ef63d JB |
3393 | WARN_ON_ONCE(softirq_count() == 0); |
3394 | ||
444e3803 | 3395 | if (WARN_ON(status->band >= IEEE80211_NUM_BANDS)) |
77a980dc | 3396 | goto drop; |
8318d78a JB |
3397 | |
3398 | sband = local->hw.wiphy->bands[status->band]; | |
77a980dc JB |
3399 | if (WARN_ON(!sband)) |
3400 | goto drop; | |
8318d78a | 3401 | |
89c3a8ac JB |
3402 | /* |
3403 | * If we're suspending, it is possible although not too likely | |
3404 | * that we'd be receiving frames after having already partially | |
3405 | * quiesced the stack. We can't process such frames then since | |
3406 | * that might, for example, cause stations to be added or other | |
3407 | * driver callbacks be invoked. | |
3408 | */ | |
77a980dc JB |
3409 | if (unlikely(local->quiescing || local->suspended)) |
3410 | goto drop; | |
89c3a8ac | 3411 | |
04800ada AN |
3412 | /* We might be during a HW reconfig, prevent Rx for the same reason */ |
3413 | if (unlikely(local->in_reconfig)) | |
3414 | goto drop; | |
3415 | ||
ea77f12f JB |
3416 | /* |
3417 | * The same happens when we're not even started, | |
3418 | * but that's worth a warning. | |
3419 | */ | |
77a980dc JB |
3420 | if (WARN_ON(!local->started)) |
3421 | goto drop; | |
ea77f12f | 3422 | |
fc885189 | 3423 | if (likely(!(status->flag & RX_FLAG_FAILED_PLCP_CRC))) { |
e5d6eb83 | 3424 | /* |
fc885189 JB |
3425 | * Validate the rate, unless a PLCP error means that |
3426 | * we probably can't have a valid rate here anyway. | |
e5d6eb83 | 3427 | */ |
fc885189 JB |
3428 | |
3429 | if (status->flag & RX_FLAG_HT) { | |
3430 | /* | |
3431 | * rate_idx is MCS index, which can be [0-76] | |
3432 | * as documented on: | |
3433 | * | |
3434 | * http://wireless.kernel.org/en/developers/Documentation/ieee80211/802.11n | |
3435 | * | |
3436 | * Anything else would be some sort of driver or | |
3437 | * hardware error. The driver should catch hardware | |
3438 | * errors. | |
3439 | */ | |
444e3803 | 3440 | if (WARN(status->rate_idx > 76, |
fc885189 JB |
3441 | "Rate marked as an HT rate but passed " |
3442 | "status->rate_idx is not " | |
3443 | "an MCS index [0-76]: %d (0x%02x)\n", | |
3444 | status->rate_idx, | |
3445 | status->rate_idx)) | |
3446 | goto drop; | |
5614618e JB |
3447 | } else if (status->flag & RX_FLAG_VHT) { |
3448 | if (WARN_ONCE(status->rate_idx > 9 || | |
3449 | !status->vht_nss || | |
3450 | status->vht_nss > 8, | |
3451 | "Rate marked as a VHT rate but data is invalid: MCS: %d, NSS: %d\n", | |
3452 | status->rate_idx, status->vht_nss)) | |
3453 | goto drop; | |
fc885189 | 3454 | } else { |
444e3803 | 3455 | if (WARN_ON(status->rate_idx >= sband->n_bitrates)) |
fc885189 JB |
3456 | goto drop; |
3457 | rate = &sband->bitrates[status->rate_idx]; | |
3458 | } | |
0fb8ca45 | 3459 | } |
6368e4b1 | 3460 | |
554891e6 JB |
3461 | status->rx_flags = 0; |
3462 | ||
6368e4b1 RR |
3463 | /* |
3464 | * key references and virtual interfaces are protected using RCU | |
3465 | * and this requires that we are in a read-side RCU section during | |
3466 | * receive processing | |
3467 | */ | |
3468 | rcu_read_lock(); | |
3469 | ||
3470 | /* | |
3471 | * Frames with failed FCS/PLCP checksum are not returned, | |
3472 | * all other frames are returned without radiotap header | |
3473 | * if it was previously present. | |
3474 | * Also, frames with less than 16 bytes are dropped. | |
3475 | */ | |
f1d58c25 | 3476 | skb = ieee80211_rx_monitor(local, skb, rate); |
6368e4b1 RR |
3477 | if (!skb) { |
3478 | rcu_read_unlock(); | |
3479 | return; | |
3480 | } | |
3481 | ||
e1e54068 JB |
3482 | ieee80211_tpt_led_trig_rx(local, |
3483 | ((struct ieee80211_hdr *)skb->data)->frame_control, | |
3484 | skb->len); | |
071d9ac2 | 3485 | __ieee80211_rx_handle_packet(hw, skb); |
6368e4b1 RR |
3486 | |
3487 | rcu_read_unlock(); | |
77a980dc JB |
3488 | |
3489 | return; | |
3490 | drop: | |
3491 | kfree_skb(skb); | |
6368e4b1 | 3492 | } |
103bf9f7 | 3493 | EXPORT_SYMBOL(ieee80211_rx); |
571ecf67 JB |
3494 | |
3495 | /* This is a version of the rx handler that can be called from hard irq | |
3496 | * context. Post the skb on the queue and schedule the tasklet */ | |
f1d58c25 | 3497 | void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb) |
571ecf67 JB |
3498 | { |
3499 | struct ieee80211_local *local = hw_to_local(hw); | |
3500 | ||
3501 | BUILD_BUG_ON(sizeof(struct ieee80211_rx_status) > sizeof(skb->cb)); | |
3502 | ||
571ecf67 JB |
3503 | skb->pkt_type = IEEE80211_RX_MSG; |
3504 | skb_queue_tail(&local->skb_queue, skb); | |
3505 | tasklet_schedule(&local->tasklet); | |
3506 | } | |
3507 | EXPORT_SYMBOL(ieee80211_rx_irqsafe); |